diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 0e55dfc..3926326 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -2,8 +2,8 @@
 <project version="4">
   <component name="ChangeListManager">
     <list default="true" id="a827305c-f450-4dd8-9234-28c4c187e3c8" name="Default" comment="">
+      <change beforePath="$PROJECT_DIR$/.gitignore" beforeDir="false" afterPath="$PROJECT_DIR$/.gitignore" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/README.rst" beforeDir="false" afterPath="$PROJECT_DIR$/README.rst" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
diff --git a/venv/bin/activate b/venv/bin/activate
deleted file mode 100644
index 6e04759..0000000
--- a/venv/bin/activate
+++ /dev/null
@@ -1,76 +0,0 @@
-# This file must be used with "source bin/activate" *from bash*
-# you cannot run it directly
-
-deactivate () {
-    # reset old environment variables
-    if [ -n "${_OLD_VIRTUAL_PATH:-}" ] ; then
-        PATH="${_OLD_VIRTUAL_PATH:-}"
-        export PATH
-        unset _OLD_VIRTUAL_PATH
-    fi
-    if [ -n "${_OLD_VIRTUAL_PYTHONHOME:-}" ] ; then
-        PYTHONHOME="${_OLD_VIRTUAL_PYTHONHOME:-}"
-        export PYTHONHOME
-        unset _OLD_VIRTUAL_PYTHONHOME
-    fi
-
-    # This should detect bash and zsh, which have a hash command that must
-    # be called to get it to forget past commands.  Without forgetting
-    # past commands the $PATH changes we made may not be respected
-    if [ -n "${BASH:-}" -o -n "${ZSH_VERSION:-}" ] ; then
-        hash -r
-    fi
-
-    if [ -n "${_OLD_VIRTUAL_PS1:-}" ] ; then
-        PS1="${_OLD_VIRTUAL_PS1:-}"
-        export PS1
-        unset _OLD_VIRTUAL_PS1
-    fi
-
-    unset VIRTUAL_ENV
-    if [ ! "${1:-}" = "nondestructive" ] ; then
-    # Self destruct!
-        unset -f deactivate
-    fi
-}
-
-# unset irrelevant variables
-deactivate nondestructive
-
-VIRTUAL_ENV="/home/mariusz/IdeaProjects/mopidy-radionet/venv"
-export VIRTUAL_ENV
-
-_OLD_VIRTUAL_PATH="$PATH"
-PATH="$VIRTUAL_ENV/bin:$PATH"
-export PATH
-
-# unset PYTHONHOME if set
-# this will fail if PYTHONHOME is set to the empty string (which is bad anyway)
-# could use `if (set -u; : $PYTHONHOME) ;` in bash
-if [ -n "${PYTHONHOME:-}" ] ; then
-    _OLD_VIRTUAL_PYTHONHOME="${PYTHONHOME:-}"
-    unset PYTHONHOME
-fi
-
-if [ -z "${VIRTUAL_ENV_DISABLE_PROMPT:-}" ] ; then
-    _OLD_VIRTUAL_PS1="${PS1:-}"
-    if [ "x(venv) " != x ] ; then
-	PS1="(venv) ${PS1:-}"
-    else
-    if [ "`basename \"$VIRTUAL_ENV\"`" = "__" ] ; then
-        # special case for Aspen magic directories
-        # see http://www.zetadev.com/software/aspen/
-        PS1="[`basename \`dirname \"$VIRTUAL_ENV\"\``] $PS1"
-    else
-        PS1="(`basename \"$VIRTUAL_ENV\"`)$PS1"
-    fi
-    fi
-    export PS1
-fi
-
-# This should detect bash and zsh, which have a hash command that must
-# be called to get it to forget past commands.  Without forgetting
-# past commands the $PATH changes we made may not be respected
-if [ -n "${BASH:-}" -o -n "${ZSH_VERSION:-}" ] ; then
-    hash -r
-fi
diff --git a/venv/bin/activate.csh b/venv/bin/activate.csh
deleted file mode 100644
index 2914e2d..0000000
--- a/venv/bin/activate.csh
+++ /dev/null
@@ -1,37 +0,0 @@
-# This file must be used with "source bin/activate.csh" *from csh*.
-# You cannot run it directly.
-# Created by Davide Di Blasi <davidedb@gmail.com>.
-# Ported to Python 3.3 venv by Andrew Svetlov <andrew.svetlov@gmail.com>
-
-alias deactivate 'test $?_OLD_VIRTUAL_PATH != 0 && setenv PATH "$_OLD_VIRTUAL_PATH" && unset _OLD_VIRTUAL_PATH; rehash; test $?_OLD_VIRTUAL_PROMPT != 0 && set prompt="$_OLD_VIRTUAL_PROMPT" && unset _OLD_VIRTUAL_PROMPT; unsetenv VIRTUAL_ENV; test "\!:*" != "nondestructive" && unalias deactivate'
-
-# Unset irrelevant variables.
-deactivate nondestructive
-
-setenv VIRTUAL_ENV "/home/mariusz/IdeaProjects/mopidy-radionet/venv"
-
-set _OLD_VIRTUAL_PATH="$PATH"
-setenv PATH "$VIRTUAL_ENV/bin:$PATH"
-
-
-set _OLD_VIRTUAL_PROMPT="$prompt"
-
-if (! "$?VIRTUAL_ENV_DISABLE_PROMPT") then
-    if ("venv" != "") then
-        set env_name = "venv"
-    else
-        if (`basename "VIRTUAL_ENV"` == "__") then
-            # special case for Aspen magic directories
-            # see http://www.zetadev.com/software/aspen/
-            set env_name = `basename \`dirname "$VIRTUAL_ENV"\``
-        else
-            set env_name = `basename "$VIRTUAL_ENV"`
-        endif
-    endif
-    set prompt = "[$env_name] $prompt"
-    unset env_name
-endif
-
-alias pydoc python -m pydoc
-
-rehash
diff --git a/venv/bin/activate.fish b/venv/bin/activate.fish
deleted file mode 100644
index 61c656d..0000000
--- a/venv/bin/activate.fish
+++ /dev/null
@@ -1,75 +0,0 @@
-# This file must be used with ". bin/activate.fish" *from fish* (http://fishshell.org)
-# you cannot run it directly
-
-function deactivate  -d "Exit virtualenv and return to normal shell environment"
-    # reset old environment variables
-    if test -n "$_OLD_VIRTUAL_PATH"
-        set -gx PATH $_OLD_VIRTUAL_PATH
-        set -e _OLD_VIRTUAL_PATH
-    end
-    if test -n "$_OLD_VIRTUAL_PYTHONHOME"
-        set -gx PYTHONHOME $_OLD_VIRTUAL_PYTHONHOME
-        set -e _OLD_VIRTUAL_PYTHONHOME
-    end
-
-    if test -n "$_OLD_FISH_PROMPT_OVERRIDE"
-        functions -e fish_prompt
-        set -e _OLD_FISH_PROMPT_OVERRIDE
-        functions -c _old_fish_prompt fish_prompt
-        functions -e _old_fish_prompt
-    end
-
-    set -e VIRTUAL_ENV
-    if test "$argv[1]" != "nondestructive"
-        # Self destruct!
-        functions -e deactivate
-    end
-end
-
-# unset irrelevant variables
-deactivate nondestructive
-
-set -gx VIRTUAL_ENV "/home/mariusz/IdeaProjects/mopidy-radionet/venv"
-
-set -gx _OLD_VIRTUAL_PATH $PATH
-set -gx PATH "$VIRTUAL_ENV/bin" $PATH
-
-# unset PYTHONHOME if set
-if set -q PYTHONHOME
-    set -gx _OLD_VIRTUAL_PYTHONHOME $PYTHONHOME
-    set -e PYTHONHOME
-end
-
-if test -z "$VIRTUAL_ENV_DISABLE_PROMPT"
-    # fish uses a function instead of an env var to generate the prompt.
-
-    # save the current fish_prompt function as the function _old_fish_prompt
-    functions -c fish_prompt _old_fish_prompt
-
-    # with the original prompt function renamed, we can override with our own.
-    function fish_prompt
-        # Save the return status of the last command
-        set -l old_status $status
-
-        # Prompt override?
-        if test -n "(venv) "
-            printf "%s%s" "(venv) " (set_color normal)
-        else
-            # ...Otherwise, prepend env
-            set -l _checkbase (basename "$VIRTUAL_ENV")
-            if test $_checkbase = "__"
-                # special case for Aspen magic directories
-                # see http://www.zetadev.com/software/aspen/
-                printf "%s[%s]%s " (set_color -b blue white) (basename (dirname "$VIRTUAL_ENV")) (set_color normal)
-            else
-                printf "%s(%s)%s" (set_color -b blue white) (basename "$VIRTUAL_ENV") (set_color normal)
-            end
-        end
-
-        # Restore the return status of the previous command.
-        echo "exit $old_status" | .
-        _old_fish_prompt
-    end
-
-    set -gx _OLD_FISH_PROMPT_OVERRIDE "$VIRTUAL_ENV"
-end
diff --git a/venv/bin/chardetect b/venv/bin/chardetect
deleted file mode 100755
index 3f12e57..0000000
--- a/venv/bin/chardetect
+++ /dev/null
@@ -1,10 +0,0 @@
-#!/home/mariusz/IdeaProjects/mopidy-radionet/venv/bin/python
-# -*- coding: utf-8 -*-
-import re
-import sys
-
-from chardet.cli.chardetect import main
-
-if __name__ == '__main__':
-    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
-    sys.exit(main())
diff --git a/venv/bin/easy_install b/venv/bin/easy_install
deleted file mode 100755
index c8ef04c..0000000
--- a/venv/bin/easy_install
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/home/mariusz/IdeaProjects/mopidy-radionet/venv/bin/python
-# EASY-INSTALL-ENTRY-SCRIPT: 'setuptools==40.8.0','console_scripts','easy_install'
-__requires__ = 'setuptools==40.8.0'
-import re
-import sys
-from pkg_resources import load_entry_point
-
-if __name__ == '__main__':
-    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
-    sys.exit(
-        load_entry_point('setuptools==40.8.0', 'console_scripts', 'easy_install')()
-    )
diff --git a/venv/bin/easy_install-3.7 b/venv/bin/easy_install-3.7
deleted file mode 100755
index 2c5c8ed..0000000
--- a/venv/bin/easy_install-3.7
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/home/mariusz/IdeaProjects/mopidy-radionet/venv/bin/python
-# EASY-INSTALL-ENTRY-SCRIPT: 'setuptools==40.8.0','console_scripts','easy_install-3.7'
-__requires__ = 'setuptools==40.8.0'
-import re
-import sys
-from pkg_resources import load_entry_point
-
-if __name__ == '__main__':
-    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
-    sys.exit(
-        load_entry_point('setuptools==40.8.0', 'console_scripts', 'easy_install-3.7')()
-    )
diff --git a/venv/bin/mopidy b/venv/bin/mopidy
deleted file mode 100755
index 6c233e8..0000000
--- a/venv/bin/mopidy
+++ /dev/null
@@ -1,10 +0,0 @@
-#!/home/mariusz/IdeaProjects/mopidy-radionet/venv/bin/python
-# -*- coding: utf-8 -*-
-import re
-import sys
-
-from mopidy.__main__ import main
-
-if __name__ == '__main__':
-    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
-    sys.exit(main())
diff --git a/venv/bin/pip b/venv/bin/pip
deleted file mode 100755
index 9b6a41d..0000000
--- a/venv/bin/pip
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/home/mariusz/IdeaProjects/mopidy-radionet/venv/bin/python
-# EASY-INSTALL-ENTRY-SCRIPT: 'pip==19.0.3','console_scripts','pip'
-__requires__ = 'pip==19.0.3'
-import re
-import sys
-from pkg_resources import load_entry_point
-
-if __name__ == '__main__':
-    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
-    sys.exit(
-        load_entry_point('pip==19.0.3', 'console_scripts', 'pip')()
-    )
diff --git a/venv/bin/pip3 b/venv/bin/pip3
deleted file mode 100755
index 84fd679..0000000
--- a/venv/bin/pip3
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/home/mariusz/IdeaProjects/mopidy-radionet/venv/bin/python
-# EASY-INSTALL-ENTRY-SCRIPT: 'pip==19.0.3','console_scripts','pip3'
-__requires__ = 'pip==19.0.3'
-import re
-import sys
-from pkg_resources import load_entry_point
-
-if __name__ == '__main__':
-    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
-    sys.exit(
-        load_entry_point('pip==19.0.3', 'console_scripts', 'pip3')()
-    )
diff --git a/venv/bin/pip3.7 b/venv/bin/pip3.7
deleted file mode 100755
index 8d254a8..0000000
--- a/venv/bin/pip3.7
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/home/mariusz/IdeaProjects/mopidy-radionet/venv/bin/python
-# EASY-INSTALL-ENTRY-SCRIPT: 'pip==19.0.3','console_scripts','pip3.7'
-__requires__ = 'pip==19.0.3'
-import re
-import sys
-from pkg_resources import load_entry_point
-
-if __name__ == '__main__':
-    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
-    sys.exit(
-        load_entry_point('pip==19.0.3', 'console_scripts', 'pip3.7')()
-    )
diff --git a/venv/bin/python b/venv/bin/python
deleted file mode 120000
index 940bee3..0000000
--- a/venv/bin/python
+++ /dev/null
@@ -1 +0,0 @@
-python3.7
\ No newline at end of file
diff --git a/venv/bin/python3 b/venv/bin/python3
deleted file mode 120000
index 940bee3..0000000
--- a/venv/bin/python3
+++ /dev/null
@@ -1 +0,0 @@
-python3.7
\ No newline at end of file
diff --git a/venv/bin/python3.7 b/venv/bin/python3.7
deleted file mode 120000
index f097b0e..0000000
--- a/venv/bin/python3.7
+++ /dev/null
@@ -1 +0,0 @@
-/usr/bin/python3.7
\ No newline at end of file
diff --git a/venv/lib/python3.7/site-packages/Mopidy-3.0.1.dist-info/INSTALLER b/venv/lib/python3.7/site-packages/Mopidy-3.0.1.dist-info/INSTALLER
deleted file mode 100644
index a1b589e..0000000
--- a/venv/lib/python3.7/site-packages/Mopidy-3.0.1.dist-info/INSTALLER
+++ /dev/null
@@ -1 +0,0 @@
-pip
diff --git a/venv/lib/python3.7/site-packages/Mopidy-3.0.1.dist-info/LICENSE b/venv/lib/python3.7/site-packages/Mopidy-3.0.1.dist-info/LICENSE
deleted file mode 100644
index d645695..0000000
--- a/venv/lib/python3.7/site-packages/Mopidy-3.0.1.dist-info/LICENSE
+++ /dev/null
@@ -1,202 +0,0 @@
-
-                                 Apache License
-                           Version 2.0, January 2004
-                        http://www.apache.org/licenses/
-
-   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
-
-   1. Definitions.
-
-      "License" shall mean the terms and conditions for use, reproduction,
-      and distribution as defined by Sections 1 through 9 of this document.
-
-      "Licensor" shall mean the copyright owner or entity authorized by
-      the copyright owner that is granting the License.
-
-      "Legal Entity" shall mean the union of the acting entity and all
-      other entities that control, are controlled by, or are under common
-      control with that entity. For the purposes of this definition,
-      "control" means (i) the power, direct or indirect, to cause the
-      direction or management of such entity, whether by contract or
-      otherwise, or (ii) ownership of fifty percent (50%) or more of the
-      outstanding shares, or (iii) beneficial ownership of such entity.
-
-      "You" (or "Your") shall mean an individual or Legal Entity
-      exercising permissions granted by this License.
-
-      "Source" form shall mean the preferred form for making modifications,
-      including but not limited to software source code, documentation
-      source, and configuration files.
-
-      "Object" form shall mean any form resulting from mechanical
-      transformation or translation of a Source form, including but
-      not limited to compiled object code, generated documentation,
-      and conversions to other media types.
-
-      "Work" shall mean the work of authorship, whether in Source or
-      Object form, made available under the License, as indicated by a
-      copyright notice that is included in or attached to the work
-      (an example is provided in the Appendix below).
-
-      "Derivative Works" shall mean any work, whether in Source or Object
-      form, that is based on (or derived from) the Work and for which the
-      editorial revisions, annotations, elaborations, or other modifications
-      represent, as a whole, an original work of authorship. For the purposes
-      of this License, Derivative Works shall not include works that remain
-      separable from, or merely link (or bind by name) to the interfaces of,
-      the Work and Derivative Works thereof.
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-      "Contribution" shall mean any work of authorship, including
-      the original version of the Work and any modifications or additions
-      to that Work or Derivative Works thereof, that is intentionally
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-      "Contributor" shall mean Licensor and any individual or Legal Entity
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-   5. Submission of Contributions. Unless You explicitly state otherwise,
-      any Contribution intentionally submitted for inclusion in the Work
-      by You to the Licensor shall be under the terms and conditions of
-      this License, without any additional terms or conditions.
-      Notwithstanding the above, nothing herein shall supersede or modify
-      the terms of any separate license agreement you may have executed
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-      agreed to in writing, Licensor provides the Work (and each
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-      whether in tort (including negligence), contract, or otherwise,
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-   END OF TERMS AND CONDITIONS
-
-   APPENDIX: How to apply the Apache License to your work.
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-      To apply the Apache License to your work, attach the following
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-   Licensed under the Apache License, Version 2.0 (the "License");
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-       http://www.apache.org/licenses/LICENSE-2.0
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-   distributed under the License is distributed on an "AS IS" BASIS,
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-   See the License for the specific language governing permissions and
-   limitations under the License.
diff --git a/venv/lib/python3.7/site-packages/Mopidy-3.0.1.dist-info/METADATA b/venv/lib/python3.7/site-packages/Mopidy-3.0.1.dist-info/METADATA
deleted file mode 100644
index 5566713..0000000
--- a/venv/lib/python3.7/site-packages/Mopidy-3.0.1.dist-info/METADATA
+++ /dev/null
@@ -1,159 +0,0 @@
-Metadata-Version: 2.1
-Name: Mopidy
-Version: 3.0.1
-Summary: Mopidy is an extensible music server written in Python
-Home-page: https://mopidy.com/
-Author: Stein Magnus Jodal
-Author-email: stein.magnus@jodal.no
-License: Apache License, Version 2.0
-Project-URL: Documentation, https://docs.mopidy.com/
-Project-URL: Discourse forum, https://discourse.mopidy.com/
-Project-URL: Zulip chat, https://mopidy.zulipchat.com/
-Project-URL: Source, https://github.com/mopidy/mopidy
-Project-URL: Issues, https://github.com/mopidy/mopidy/issues
-Platform: UNKNOWN
-Classifier: Development Status :: 5 - Production/Stable
-Classifier: Environment :: No Input/Output (Daemon)
-Classifier: Intended Audience :: End Users/Desktop
-Classifier: License :: OSI Approved :: Apache Software License
-Classifier: Operating System :: MacOS :: MacOS X
-Classifier: Operating System :: POSIX :: Linux
-Classifier: Programming Language :: Python :: 3
-Classifier: Programming Language :: Python :: 3.7
-Classifier: Programming Language :: Python :: 3.8
-Classifier: Topic :: Multimedia :: Sound/Audio :: Players
-Requires-Python: >=3.7
-Requires-Dist: Pykka (>=2.0.1)
-Requires-Dist: requests (>=2.0)
-Requires-Dist: setuptools
-Requires-Dist: tornado (>=4.4)
-Provides-Extra: dev
-Requires-Dist: pygraphviz ; extra == 'dev'
-Requires-Dist: sphinx ; extra == 'dev'
-Requires-Dist: sphinx-rtd-theme ; extra == 'dev'
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-Requires-Dist: flake8-import-order ; extra == 'dev'
-Requires-Dist: isort[pyproject] ; extra == 'dev'
-Requires-Dist: pep8-naming ; extra == 'dev'
-Requires-Dist: twine ; extra == 'dev'
-Requires-Dist: wheel ; extra == 'dev'
-Requires-Dist: pytest ; extra == 'dev'
-Requires-Dist: pytest-cov ; extra == 'dev'
-Requires-Dist: responses ; extra == 'dev'
-Provides-Extra: docs
-Requires-Dist: pygraphviz ; extra == 'docs'
-Requires-Dist: sphinx ; extra == 'docs'
-Requires-Dist: sphinx-rtd-theme ; extra == 'docs'
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-Requires-Dist: flake8 ; extra == 'lint'
-Requires-Dist: flake8-bugbear ; extra == 'lint'
-Requires-Dist: flake8-import-order ; extra == 'lint'
-Requires-Dist: isort[pyproject] ; extra == 'lint'
-Requires-Dist: pep8-naming ; extra == 'lint'
-Provides-Extra: release
-Requires-Dist: twine ; extra == 'release'
-Requires-Dist: wheel ; extra == 'release'
-Provides-Extra: test
-Requires-Dist: pytest ; extra == 'test'
-Requires-Dist: pytest-cov ; extra == 'test'
-Requires-Dist: responses ; extra == 'test'
-
-******
-Mopidy
-******
-
-`Mopidy`_ is an extensible music server written in Python.
-
-Mopidy plays music from local disk, Spotify, SoundCloud, Google Play Music, and
-more. You edit the playlist from any phone, tablet, or computer using a variety
-of MPD and web clients.
-
-**Stream music from the cloud**
-
-Vanilla Mopidy only plays music from files and radio streams.  Through
-`extensions`_, Mopidy can play music from cloud services like Spotify,
-SoundCloud, and Google Play Music.
-With Mopidy's extension support, backends for new music sources can be easily
-added.
-
-**Mopidy is just a server**
-
-Mopidy is a Python application that runs in a terminal or in the background on
-Linux computers or Macs that have network connectivity and audio output.
-Out of the box, Mopidy is an HTTP server. If you install the `Mopidy-MPD`_
-extension, it becomes an MPD server too. Many additional frontends for
-controlling Mopidy are available as extensions.
-
-**Pick your favorite client**
-
-You and the people around you can all connect their favorite MPD or web client
-to the Mopidy server to search for music and manage the playlist together.
-With a browser or MPD client, which is available for all popular operating
-systems, you can control the music from any phone, tablet, or computer.
-
-**Mopidy on Raspberry Pi**
-
-The `Raspberry Pi`_ is an popular device to run Mopidy on, either using
-Raspbian, Ubuntu, or Arch Linux.
-Pimoroni recommends Mopidy for use with their `Pirate Audio`_ audio gear for
-Raspberry Pi.
-Mopidy is also a significant building block in the `Pi Musicbox`_ integrated
-audio jukebox system for Raspberry Pi.
-
-**Mopidy is hackable**
-
-Mopidy's extension support and Python, JSON-RPC, and JavaScript APIs make
-Mopidy a perfect base for your projects.
-In one hack, a Raspberry Pi was embedded in an old cassette player. The buttons
-and volume control are wired up with GPIO on the Raspberry Pi, and is used to
-control playback through a custom Mopidy extension. The cassettes have NFC tags
-used to select playlists from Spotify.
-
-.. _Mopidy: https://mopidy.com/
-.. _extensions: https://mopidy.com/ext/
-.. _Mopidy-MPD: https://mopidy.com/ext/mpd/
-.. _Raspberry Pi: https://www.raspberrypi.org/
-.. _Pirate Audio: https://shop.pimoroni.com/collections/pirate-audio
-.. _Pi Musicbox: https://www.pimusicbox.com/
-
-
-**Getting started**
-
-To get started with Mopidy, begin by reading the
-`installation docs <https://docs.mopidy.com/en/latest/installation/>`_.
-
-
-**Project resources**
-
-- `Documentation <https://docs.mopidy.com/>`_
-- `Discourse forum <https://discourse.mopidy.com/>`_
-- `Zulip chat <https://mopidy.zulipchat.com/>`_
-- `Source code <https://github.com/mopidy/mopidy>`_
-- `Issue tracker <https://github.com/mopidy/mopidy/issues>`_
-
-.. image:: https://img.shields.io/pypi/v/Mopidy.svg?style=flat
-    :target: https://pypi.python.org/pypi/Mopidy/
-    :alt: Latest PyPI version
-
-.. image:: https://img.shields.io/circleci/project/github/mopidy/mopidy/develop.svg
-    :target: https://circleci.com/gh/mopidy/mopidy
-    :alt: CircleCI build status
-
-.. image:: https://img.shields.io/readthedocs/mopidy.svg
-    :target: https://docs.mopidy.com/
-    :alt: Read the Docs build status
-
-.. image:: https://img.shields.io/codecov/c/github/mopidy/mopidy/develop.svg
-    :target: https://codecov.io/gh/mopidy/mopidy
-    :alt: Test coverage
-
-.. image:: https://img.shields.io/badge/chat-on%20zulip-brightgreen
-    :target: https://mopidy.zulipchat.com/
-    :alt: Chat on Zulip
-
-
diff --git a/venv/lib/python3.7/site-packages/Mopidy-3.0.1.dist-info/RECORD b/venv/lib/python3.7/site-packages/Mopidy-3.0.1.dist-info/RECORD
deleted file mode 100644
index 1584786..0000000
--- a/venv/lib/python3.7/site-packages/Mopidy-3.0.1.dist-info/RECORD
+++ /dev/null
@@ -1,153 +0,0 @@
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-mopidy/softwaremixer/__init__.py,sha256=pjmfTdI0SKGBwHayIJceBfphElOVP--ef7N8Mm-g3dM,559
-mopidy/softwaremixer/__pycache__/__init__.cpython-37.pyc,,
-mopidy/softwaremixer/__pycache__/mixer.cpython-37.pyc,,
-mopidy/softwaremixer/ext.conf,sha256=nca74OmIqnsY32f6JIUQk2KVDfI3wqT4BCWjMILLq_M,31
-mopidy/softwaremixer/mixer.py,sha256=-nVWKWLw52xW4b4r6-_dgfkVdE8pntdlBnF4afx50sU,1599
-mopidy/stream/__init__.py,sha256=yZ66Ck3uGKSBfPnRa3uq7TRAVb0XowgAFUMqAbEv-QM,788
-mopidy/stream/__pycache__/__init__.cpython-37.pyc,,
-mopidy/stream/__pycache__/actor.cpython-37.pyc,,
-mopidy/stream/actor.py,sha256=Aa3D3DEYVQLaMmp9Hju-6_sUz171nnyLXnqbwx8t524,5982
-mopidy/stream/ext.conf,sha256=RjLTZNsyYLIkV0-4RNAbInbEIg2yMNlzJNWgtg5dP8U,127
-mopidy/zeroconf.py,sha256=T38d3Zg9F80UECpT_wgzW10wycNJrgVXZQoE6GgbUzU,4437
diff --git a/venv/lib/python3.7/site-packages/Mopidy-3.0.1.dist-info/WHEEL b/venv/lib/python3.7/site-packages/Mopidy-3.0.1.dist-info/WHEEL
deleted file mode 100644
index 3b5c403..0000000
--- a/venv/lib/python3.7/site-packages/Mopidy-3.0.1.dist-info/WHEEL
+++ /dev/null
@@ -1,5 +0,0 @@
-Wheel-Version: 1.0
-Generator: bdist_wheel (0.33.6)
-Root-Is-Purelib: true
-Tag: py3-none-any
-
diff --git a/venv/lib/python3.7/site-packages/Mopidy-3.0.1.dist-info/entry_points.txt b/venv/lib/python3.7/site-packages/Mopidy-3.0.1.dist-info/entry_points.txt
deleted file mode 100644
index 4a9520a..0000000
--- a/venv/lib/python3.7/site-packages/Mopidy-3.0.1.dist-info/entry_points.txt
+++ /dev/null
@@ -1,10 +0,0 @@
-[console_scripts]
-mopidy = mopidy.__main__:main
-
-[mopidy.ext]
-file = mopidy.file:Extension
-http = mopidy.http:Extension
-m3u = mopidy.m3u:Extension
-softwaremixer = mopidy.softwaremixer:Extension
-stream = mopidy.stream:Extension
-
diff --git a/venv/lib/python3.7/site-packages/Mopidy-3.0.1.dist-info/top_level.txt b/venv/lib/python3.7/site-packages/Mopidy-3.0.1.dist-info/top_level.txt
deleted file mode 100644
index 1cfd43c..0000000
--- a/venv/lib/python3.7/site-packages/Mopidy-3.0.1.dist-info/top_level.txt
+++ /dev/null
@@ -1 +0,0 @@
-mopidy
diff --git a/venv/lib/python3.7/site-packages/Pykka-2.0.2.dist-info/INSTALLER b/venv/lib/python3.7/site-packages/Pykka-2.0.2.dist-info/INSTALLER
deleted file mode 100644
index a1b589e..0000000
--- a/venv/lib/python3.7/site-packages/Pykka-2.0.2.dist-info/INSTALLER
+++ /dev/null
@@ -1 +0,0 @@
-pip
diff --git a/venv/lib/python3.7/site-packages/Pykka-2.0.2.dist-info/LICENSE b/venv/lib/python3.7/site-packages/Pykka-2.0.2.dist-info/LICENSE
deleted file mode 100644
index d645695..0000000
--- a/venv/lib/python3.7/site-packages/Pykka-2.0.2.dist-info/LICENSE
+++ /dev/null
@@ -1,202 +0,0 @@
-
-                                 Apache License
-                           Version 2.0, January 2004
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diff --git a/venv/lib/python3.7/site-packages/Pykka-2.0.2.dist-info/METADATA b/venv/lib/python3.7/site-packages/Pykka-2.0.2.dist-info/METADATA
deleted file mode 100644
index c24022a..0000000
--- a/venv/lib/python3.7/site-packages/Pykka-2.0.2.dist-info/METADATA
+++ /dev/null
@@ -1,89 +0,0 @@
-Metadata-Version: 2.1
-Name: Pykka
-Version: 2.0.2
-Summary: Pykka is a Python implementation of the actor model
-Home-page: https://www.pykka.org/
-Author: Stein Magnus Jodal
-Author-email: stein.magnus@jodal.no
-License: Apache License, Version 2.0
-Project-URL: Issues, https://github.com/jodal/pykka/issues
-Project-URL: Source, https://github.com/jodal/pykka
-Platform: UNKNOWN
-Classifier: Development Status :: 5 - Production/Stable
-Classifier: Intended Audience :: Developers
-Classifier: Topic :: Software Development :: Libraries
-Classifier: License :: OSI Approved :: Apache Software License
-Classifier: Programming Language :: Python :: 2
-Classifier: Programming Language :: Python :: 2.7
-Classifier: Programming Language :: Python :: 3
-Classifier: Programming Language :: Python :: 3.5
-Classifier: Programming Language :: Python :: 3.6
-Classifier: Programming Language :: Python :: 3.7
-Classifier: Programming Language :: Python :: Implementation :: CPython
-Classifier: Programming Language :: Python :: Implementation :: PyPy
-Requires-Python: >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*
-Provides-Extra: dev
-Requires-Dist: black ; extra == 'dev'
-Requires-Dist: check-manifest ; extra == 'dev'
-Requires-Dist: flake8 ; extra == 'dev'
-Requires-Dist: flake8-import-order ; extra == 'dev'
-Requires-Dist: pytest ; extra == 'dev'
-Requires-Dist: pytest-cov ; extra == 'dev'
-Requires-Dist: pytest-mock ; extra == 'dev'
-Requires-Dist: sphinx ; extra == 'dev'
-Requires-Dist: sphinx-rtd-theme ; extra == 'dev'
-Requires-Dist: tox ; extra == 'dev'
-Requires-Dist: twine ; extra == 'dev'
-Requires-Dist: wheel ; extra == 'dev'
-
-=====
-Pykka
-=====
-
-Pykka is a Python implementation of the `actor model
-<https://en.wikipedia.org/wiki/Actor_model>`_. The actor model introduces some
-simple rules to control the sharing of state and cooperation between execution
-units, which makes it easier to build concurrent applications.
-
-For details and code examples, see the `Pykka documentation
-<https://www.pykka.org/>`_.
-
-Pykka is available from PyPI. To install it, run::
-
-    pip install pykka
-
-Pykka works with CPython 2.7 and 3.5+, as well as PyPy 2.7 and 3.5+.
-
-
-License
-=======
-
-Pykka is copyright 2010-2019 Stein Magnus Jodal and contributors.
-Pykka is licensed under the `Apache License, Version 2.0
-<https://www.apache.org/licenses/LICENSE-2.0>`_.
-
-
-Project resources
-=================
-
-- `Documentation <https://www.pykka.org/>`_
-- `Source code <https://github.com/jodal/pykka>`_
-- `Issue tracker <https://github.com/jodal/pykka/issues>`_
-
-.. image:: https://img.shields.io/pypi/v/Pykka.svg
-    :target: https://pypi.org/project/Pykka/
-    :alt: Latest PyPI version
-
-.. image:: https://img.shields.io/circleci/project/github/jodal/pykka/develop.svg
-    :target: https://circleci.com/gh/jodal/pykka
-    :alt: CircleCI build status
-
-.. image:: https://img.shields.io/readthedocs/pykka.svg
-    :target: https://www.pykka.org/
-    :alt: Read the Docs build status
-
-.. image:: https://img.shields.io/codecov/c/github/jodal/pykka/develop.svg
-    :target: https://codecov.io/gh/jodal/pykka
-    :alt: Test coverage
-
-
diff --git a/venv/lib/python3.7/site-packages/Pykka-2.0.2.dist-info/RECORD b/venv/lib/python3.7/site-packages/Pykka-2.0.2.dist-info/RECORD
deleted file mode 100644
index 4b5a1b2..0000000
--- a/venv/lib/python3.7/site-packages/Pykka-2.0.2.dist-info/RECORD
+++ /dev/null
@@ -1,36 +0,0 @@
-Pykka-2.0.2.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
-Pykka-2.0.2.dist-info/LICENSE,sha256=z8d0m5b2O9McPEK1xHG_dWgUBT6EfBDz6wA0F7xSPTA,11358
-Pykka-2.0.2.dist-info/METADATA,sha256=121HFgIU2PAjqGj4z8-UmK0yQ_2qVFvXeRn-ZVQ2IsU,3099
-Pykka-2.0.2.dist-info/RECORD,,
-Pykka-2.0.2.dist-info/WHEEL,sha256=8zNYZbwQSXoB9IfXOjPfeNwvAsALAjffgk27FqvCWbo,110
-Pykka-2.0.2.dist-info/top_level.txt,sha256=Xf5RIn3WblO67T1uO2zFkPA12CFNMlUzevb5eNqrc_E,6
-pykka/__init__.py,sha256=hLvsSdf1cHFEKHmKgySzUmGZuaRw0-XuLst-3uF5H8o,772
-pykka/__pycache__/__init__.cpython-37.pyc,,
-pykka/__pycache__/_actor.cpython-37.pyc,,
-pykka/__pycache__/_envelope.cpython-37.pyc,,
-pykka/__pycache__/_exceptions.cpython-37.pyc,,
-pykka/__pycache__/_future.cpython-37.pyc,,
-pykka/__pycache__/_proxy.cpython-37.pyc,,
-pykka/__pycache__/_ref.cpython-37.pyc,,
-pykka/__pycache__/_registry.cpython-37.pyc,,
-pykka/__pycache__/_threading.cpython-37.pyc,,
-pykka/__pycache__/debug.cpython-37.pyc,,
-pykka/__pycache__/eventlet.cpython-37.pyc,,
-pykka/__pycache__/gevent.cpython-37.pyc,,
-pykka/__pycache__/messages.cpython-37.pyc,,
-pykka/_actor.py,sha256=uij2jPyOV0LmCN8wmTqPcOPkJxB00pWMYGx_gpRdAHU,12388
-pykka/_compat/__init__.py,sha256=4SVjOsf7daueyJWZsbK4FyQGDlidF_DADrMLQoB6m1c,870
-pykka/_compat/__pycache__/__init__.cpython-37.pyc,,
-pykka/_compat/__pycache__/await_py3.cpython-37.pyc,,
-pykka/_compat/await_py3.py,sha256=YGTNqd17xP9Z5zbhXnugToxDnnzlWC9coLtkQKh6YSY,134
-pykka/_envelope.py,sha256=ZzMVFoHO-Hon5WUkyIEufdAWz5JQnmbCM0FRP7Jws00,669
-pykka/_exceptions.py,sha256=iMwfs6ksm3Q7Rtp2YRFqD3446wr-BCGbPpwj9dbAEiI,244
-pykka/_future.py,sha256=gmyFODrnbiBIntk34FHqhVje4J2_koRyx6UAJsZAHE8,8592
-pykka/_proxy.py,sha256=VzZdDjsyfmOQTNXicrlpr7HIM3c2uxlS1Yva_Q7MDMY,11938
-pykka/_ref.py,sha256=CSDPAoOEYqXySbaqF_83TMNqmTzUkiMaCZFj200cuuc,5423
-pykka/_registry.py,sha256=4aUbla_aSyX8QSBYs_9B7z-xVCqgUwgkrdS_WCQMG2M,5335
-pykka/_threading.py,sha256=qJq553IbG3yzVmZ9F3K_jNydAoJth7kVNvO2QWwgWDU,3248
-pykka/debug.py,sha256=MJdGsnAirUXP2gxh1f4QWQSPEtNIzdND1Uu5K9yJAdc,2262
-pykka/eventlet.py,sha256=r7sxEswMGVutyTy-k9qYCh3SfSQnjM2Yz4Hhr8hNXCA,2572
-pykka/gevent.py,sha256=8HqYD7p4UJZsmCIvxmm0KnQzRAyHwwr0u7zNnmUymZk,2036
-pykka/messages.py,sha256=B55XhrPAf3Fti5hDc7jFcGlwtr-u0e201EAjXyorCxo,2562
diff --git a/venv/lib/python3.7/site-packages/Pykka-2.0.2.dist-info/WHEEL b/venv/lib/python3.7/site-packages/Pykka-2.0.2.dist-info/WHEEL
deleted file mode 100644
index 8b701e9..0000000
--- a/venv/lib/python3.7/site-packages/Pykka-2.0.2.dist-info/WHEEL
+++ /dev/null
@@ -1,6 +0,0 @@
-Wheel-Version: 1.0
-Generator: bdist_wheel (0.33.6)
-Root-Is-Purelib: true
-Tag: py2-none-any
-Tag: py3-none-any
-
diff --git a/venv/lib/python3.7/site-packages/Pykka-2.0.2.dist-info/top_level.txt b/venv/lib/python3.7/site-packages/Pykka-2.0.2.dist-info/top_level.txt
deleted file mode 100644
index 85e0d3e..0000000
--- a/venv/lib/python3.7/site-packages/Pykka-2.0.2.dist-info/top_level.txt
+++ /dev/null
@@ -1 +0,0 @@
-pykka
diff --git a/venv/lib/python3.7/site-packages/certifi-2019.11.28.dist-info/DESCRIPTION.rst b/venv/lib/python3.7/site-packages/certifi-2019.11.28.dist-info/DESCRIPTION.rst
deleted file mode 100644
index 0b0953d..0000000
--- a/venv/lib/python3.7/site-packages/certifi-2019.11.28.dist-info/DESCRIPTION.rst
+++ /dev/null
@@ -1,50 +0,0 @@
-Certifi: Python SSL Certificates
-================================
-
-`Certifi`_ is a carefully curated collection of Root Certificates for
-validating the trustworthiness of SSL certificates while verifying the identity
-of TLS hosts. It has been extracted from the `Requests`_ project.
-
-Installation
-------------
-
-``certifi`` is available on PyPI. Simply install it with ``pip``::
-
-    $ pip install certifi
-
-Usage
------
-
-To reference the installed certificate authority (CA) bundle, you can use the
-built-in function::
-
-    >>> import certifi
-
-    >>> certifi.where()
-    '/usr/local/lib/python2.7/site-packages/certifi/cacert.pem'
-
-Or from the command line::
-
-    $ python -m certifi
-    /usr/local/lib/python2.7/site-packages/certifi/cacert.pem
-
-Enjoy!
-
-1024-bit Root Certificates
-~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-Browsers and certificate authorities have concluded that 1024-bit keys are
-unacceptably weak for certificates, particularly root certificates. For this
-reason, Mozilla has removed any weak (i.e. 1024-bit key) certificate from its
-bundle, replacing it with an equivalent strong (i.e. 2048-bit or greater key)
-certificate from the same CA. Because Mozilla removed these certificates from
-its bundle, ``certifi`` removed them as well.
-
-In previous versions, ``certifi`` provided the ``certifi.old_where()`` function
-to intentionally re-add the 1024-bit roots back into your bundle. This was not
-recommended in production and therefore was removed at the end of 2018.
-
-.. _`Certifi`: https://certifi.io/en/latest/
-.. _`Requests`: http://docs.python-requests.org/en/latest/
-
-
diff --git a/venv/lib/python3.7/site-packages/certifi-2019.11.28.dist-info/INSTALLER b/venv/lib/python3.7/site-packages/certifi-2019.11.28.dist-info/INSTALLER
deleted file mode 100644
index a1b589e..0000000
--- a/venv/lib/python3.7/site-packages/certifi-2019.11.28.dist-info/INSTALLER
+++ /dev/null
@@ -1 +0,0 @@
-pip
diff --git a/venv/lib/python3.7/site-packages/certifi-2019.11.28.dist-info/METADATA b/venv/lib/python3.7/site-packages/certifi-2019.11.28.dist-info/METADATA
deleted file mode 100644
index bc0532f..0000000
--- a/venv/lib/python3.7/site-packages/certifi-2019.11.28.dist-info/METADATA
+++ /dev/null
@@ -1,74 +0,0 @@
-Metadata-Version: 2.0
-Name: certifi
-Version: 2019.11.28
-Summary: Python package for providing Mozilla's CA Bundle.
-Home-page: https://certifi.io/
-Author: Kenneth Reitz
-Author-email: me@kennethreitz.com
-License: MPL-2.0
-Platform: UNKNOWN
-Classifier: Development Status :: 5 - Production/Stable
-Classifier: Intended Audience :: Developers
-Classifier: License :: OSI Approved :: Mozilla Public License 2.0 (MPL 2.0)
-Classifier: Natural Language :: English
-Classifier: Programming Language :: Python
-Classifier: Programming Language :: Python :: 2
-Classifier: Programming Language :: Python :: 2.6
-Classifier: Programming Language :: Python :: 2.7
-Classifier: Programming Language :: Python :: 3
-Classifier: Programming Language :: Python :: 3.3
-Classifier: Programming Language :: Python :: 3.4
-Classifier: Programming Language :: Python :: 3.5
-Classifier: Programming Language :: Python :: 3.6
-Classifier: Programming Language :: Python :: 3.7
-
-Certifi: Python SSL Certificates
-================================
-
-`Certifi`_ is a carefully curated collection of Root Certificates for
-validating the trustworthiness of SSL certificates while verifying the identity
-of TLS hosts. It has been extracted from the `Requests`_ project.
-
-Installation
-------------
-
-``certifi`` is available on PyPI. Simply install it with ``pip``::
-
-    $ pip install certifi
-
-Usage
------
-
-To reference the installed certificate authority (CA) bundle, you can use the
-built-in function::
-
-    >>> import certifi
-
-    >>> certifi.where()
-    '/usr/local/lib/python2.7/site-packages/certifi/cacert.pem'
-
-Or from the command line::
-
-    $ python -m certifi
-    /usr/local/lib/python2.7/site-packages/certifi/cacert.pem
-
-Enjoy!
-
-1024-bit Root Certificates
-~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-Browsers and certificate authorities have concluded that 1024-bit keys are
-unacceptably weak for certificates, particularly root certificates. For this
-reason, Mozilla has removed any weak (i.e. 1024-bit key) certificate from its
-bundle, replacing it with an equivalent strong (i.e. 2048-bit or greater key)
-certificate from the same CA. Because Mozilla removed these certificates from
-its bundle, ``certifi`` removed them as well.
-
-In previous versions, ``certifi`` provided the ``certifi.old_where()`` function
-to intentionally re-add the 1024-bit roots back into your bundle. This was not
-recommended in production and therefore was removed at the end of 2018.
-
-.. _`Certifi`: https://certifi.io/en/latest/
-.. _`Requests`: http://docs.python-requests.org/en/latest/
-
-
diff --git a/venv/lib/python3.7/site-packages/certifi-2019.11.28.dist-info/RECORD b/venv/lib/python3.7/site-packages/certifi-2019.11.28.dist-info/RECORD
deleted file mode 100644
index 20931bd..0000000
--- a/venv/lib/python3.7/site-packages/certifi-2019.11.28.dist-info/RECORD
+++ /dev/null
@@ -1,14 +0,0 @@
-certifi-2019.11.28.dist-info/DESCRIPTION.rst,sha256=aLNHONztn2ZiBpSTivVFy6EDIWmuNYSsEQwx4NWbvB4,1580
-certifi-2019.11.28.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
-certifi-2019.11.28.dist-info/METADATA,sha256=CnYsfjDpEJJMNgBGSD2v_WN-PS-g4ZmIt1aiZ8UiRiE,2523
-certifi-2019.11.28.dist-info/RECORD,,
-certifi-2019.11.28.dist-info/WHEEL,sha256=5wvfB7GvgZAbKBSE9uX9Zbi6LCL-_KgezgHblXhCRnM,113
-certifi-2019.11.28.dist-info/metadata.json,sha256=9MSLVS0RruV3LnE_uHbsv6QHamn7Lq9GwQ_gZOrw4Mw,1023
-certifi-2019.11.28.dist-info/top_level.txt,sha256=KMu4vUCfsjLrkPbSNdgdekS-pVJzBAJFO__nI8NF6-U,8
-certifi/__init__.py,sha256=JVwzDhkMttyVVtfNDrU_i0v2a-WmtEBXq0Z8oz4Ghzk,52
-certifi/__main__.py,sha256=FiOYt1Fltst7wk9DRa6GCoBr8qBUxlNQu_MKJf04E6s,41
-certifi/__pycache__/__init__.cpython-37.pyc,,
-certifi/__pycache__/__main__.cpython-37.pyc,,
-certifi/__pycache__/core.cpython-37.pyc,,
-certifi/cacert.pem,sha256=cyvv5Jx1gHACNEj2GaOrsIj0Tk8FmSvHR42uhzvlatg,281457
-certifi/core.py,sha256=EuFc2BsToG5O1-qsx4BSjQ1r1-7WRtH87b1WflZOWhI,218
diff --git a/venv/lib/python3.7/site-packages/certifi-2019.11.28.dist-info/WHEEL b/venv/lib/python3.7/site-packages/certifi-2019.11.28.dist-info/WHEEL
deleted file mode 100644
index 7bf9daa..0000000
--- a/venv/lib/python3.7/site-packages/certifi-2019.11.28.dist-info/WHEEL
+++ /dev/null
@@ -1,6 +0,0 @@
-Wheel-Version: 1.0
-Generator: bdist_wheel (0.30.0.a0)
-Root-Is-Purelib: true
-Tag: py2-none-any
-Tag: py3-none-any
-
diff --git a/venv/lib/python3.7/site-packages/certifi-2019.11.28.dist-info/metadata.json b/venv/lib/python3.7/site-packages/certifi-2019.11.28.dist-info/metadata.json
deleted file mode 100644
index 3a14841..0000000
--- a/venv/lib/python3.7/site-packages/certifi-2019.11.28.dist-info/metadata.json
+++ /dev/null
@@ -1 +0,0 @@
-{"classifiers": ["Development Status :: 5 - Production/Stable", "Intended Audience :: Developers", "License :: OSI Approved :: Mozilla Public License 2.0 (MPL 2.0)", "Natural Language :: English", "Programming Language :: Python", "Programming Language :: Python :: 2", "Programming Language :: Python :: 2.6", "Programming Language :: Python :: 2.7", "Programming Language :: Python :: 3", "Programming Language :: Python :: 3.3", "Programming Language :: Python :: 3.4", "Programming Language :: Python :: 3.5", "Programming Language :: Python :: 3.6", "Programming Language :: Python :: 3.7"], "extensions": {"python.details": {"contacts": [{"email": "me@kennethreitz.com", "name": "Kenneth Reitz", "role": "author"}], "document_names": {"description": "DESCRIPTION.rst"}, "project_urls": {"Home": "https://certifi.io/"}}}, "generator": "bdist_wheel (0.30.0.a0)", "license": "MPL-2.0", "metadata_version": "2.0", "name": "certifi", "summary": "Python package for providing Mozilla's CA Bundle.", "version": "2019.11.28"}
\ No newline at end of file
diff --git a/venv/lib/python3.7/site-packages/certifi-2019.11.28.dist-info/top_level.txt b/venv/lib/python3.7/site-packages/certifi-2019.11.28.dist-info/top_level.txt
deleted file mode 100644
index 963eac5..0000000
--- a/venv/lib/python3.7/site-packages/certifi-2019.11.28.dist-info/top_level.txt
+++ /dev/null
@@ -1 +0,0 @@
-certifi
diff --git a/venv/lib/python3.7/site-packages/certifi/__init__.py b/venv/lib/python3.7/site-packages/certifi/__init__.py
deleted file mode 100644
index 0d59a05..0000000
--- a/venv/lib/python3.7/site-packages/certifi/__init__.py
+++ /dev/null
@@ -1,3 +0,0 @@
-from .core import where
-
-__version__ = "2019.11.28"
diff --git a/venv/lib/python3.7/site-packages/certifi/__main__.py b/venv/lib/python3.7/site-packages/certifi/__main__.py
deleted file mode 100644
index 5f1da0d..0000000
--- a/venv/lib/python3.7/site-packages/certifi/__main__.py
+++ /dev/null
@@ -1,2 +0,0 @@
-from certifi import where
-print(where())
diff --git a/venv/lib/python3.7/site-packages/certifi/cacert.pem b/venv/lib/python3.7/site-packages/certifi/cacert.pem
deleted file mode 100644
index a4758ef..0000000
--- a/venv/lib/python3.7/site-packages/certifi/cacert.pem
+++ /dev/null
@@ -1,4602 +0,0 @@
-
-# Issuer: CN=GlobalSign Root CA O=GlobalSign nv-sa OU=Root CA
-# Subject: CN=GlobalSign Root CA O=GlobalSign nv-sa OU=Root CA
-# Label: "GlobalSign Root CA"
-# Serial: 4835703278459707669005204
-# MD5 Fingerprint: 3e:45:52:15:09:51:92:e1:b7:5d:37:9f:b1:87:29:8a
-# SHA1 Fingerprint: b1:bc:96:8b:d4:f4:9d:62:2a:a8:9a:81:f2:15:01:52:a4:1d:82:9c
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=GlobalSign O=GlobalSign OU=GlobalSign Root CA - R2
-# Subject: CN=GlobalSign O=GlobalSign OU=GlobalSign Root CA - R2
-# Label: "GlobalSign Root CA - R2"
-# Serial: 4835703278459682885658125
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-
-# Issuer: CN=VeriSign Class 3 Public Primary Certification Authority - G3 O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 1999 VeriSign, Inc. - For authorized use only
-# Subject: CN=VeriSign Class 3 Public Primary Certification Authority - G3 O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 1999 VeriSign, Inc. - For authorized use only
-# Label: "Verisign Class 3 Public Primary Certification Authority - G3"
-# Serial: 206684696279472310254277870180966723415
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-
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-# Subject: CN=Entrust.net Certification Authority (2048) O=Entrust.net OU=www.entrust.net/CPS_2048 incorp. by ref. (limits liab.)/(c) 1999 Entrust.net Limited
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-
-# Issuer: CN=AAA Certificate Services O=Comodo CA Limited
-# Subject: CN=AAA Certificate Services O=Comodo CA Limited
-# Label: "Comodo AAA Services root"
-# Serial: 1
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------END CERTIFICATE-----
-
-# Issuer: CN=QuoVadis Root Certification Authority O=QuoVadis Limited OU=Root Certification Authority
-# Subject: CN=QuoVadis Root Certification Authority O=QuoVadis Limited OU=Root Certification Authority
-# Label: "QuoVadis Root CA"
-# Serial: 985026699
-# MD5 Fingerprint: 27:de:36:fe:72:b7:00:03:00:9d:f4:f0:1e:6c:04:24
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=QuoVadis Root CA 2 O=QuoVadis Limited
-# Subject: CN=QuoVadis Root CA 2 O=QuoVadis Limited
-# Label: "QuoVadis Root CA 2"
-# Serial: 1289
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=QuoVadis Root CA 3 O=QuoVadis Limited
-# Subject: CN=QuoVadis Root CA 3 O=QuoVadis Limited
-# Label: "QuoVadis Root CA 3"
-# Serial: 1478
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------BEGIN CERTIFICATE-----
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-# Issuer: O=Government Root Certification Authority
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-# Label: "Taiwan GRCA"
-# Serial: 42023070807708724159991140556527066870
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-# Issuer: CN=DigiCert Assured ID Root CA O=DigiCert Inc OU=www.digicert.com
-# Subject: CN=DigiCert Assured ID Root CA O=DigiCert Inc OU=www.digicert.com
-# Label: "DigiCert Assured ID Root CA"
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=DigiCert Global Root CA O=DigiCert Inc OU=www.digicert.com
-# Subject: CN=DigiCert Global Root CA O=DigiCert Inc OU=www.digicert.com
-# Label: "DigiCert Global Root CA"
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=DigiCert High Assurance EV Root CA O=DigiCert Inc OU=www.digicert.com
-# Subject: CN=DigiCert High Assurance EV Root CA O=DigiCert Inc OU=www.digicert.com
-# Label: "DigiCert High Assurance EV Root CA"
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=DST Root CA X3 O=Digital Signature Trust Co.
-# Subject: CN=DST Root CA X3 O=Digital Signature Trust Co.
-# Label: "DST Root CA X3"
-# Serial: 91299735575339953335919266965803778155
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=SwissSign Gold CA - G2 O=SwissSign AG
-# Subject: CN=SwissSign Gold CA - G2 O=SwissSign AG
-# Label: "SwissSign Gold CA - G2"
-# Serial: 13492815561806991280
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=SwissSign Silver CA - G2 O=SwissSign AG
-# Subject: CN=SwissSign Silver CA - G2 O=SwissSign AG
-# Label: "SwissSign Silver CA - G2"
-# Serial: 5700383053117599563
-# MD5 Fingerprint: e0:06:a1:c9:7d:cf:c9:fc:0d:c0:56:75:96:d8:62:13
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=GeoTrust Primary Certification Authority O=GeoTrust Inc.
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-# Subject: CN=thawte Primary Root CA O=thawte, Inc. OU=Certification Services Division/(c) 2006 thawte, Inc. - For authorized use only
-# Label: "thawte Primary Root CA"
-# Serial: 69529181992039203566298953787712940909
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-# Subject: CN=VeriSign Class 3 Public Primary Certification Authority - G5 O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 2006 VeriSign, Inc. - For authorized use only
-# Label: "VeriSign Class 3 Public Primary Certification Authority - G5"
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-# Issuer: CN=SecureTrust CA O=SecureTrust Corporation
-# Subject: CN=SecureTrust CA O=SecureTrust Corporation
-# Label: "SecureTrust CA"
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=Secure Global CA O=SecureTrust Corporation
-# Subject: CN=Secure Global CA O=SecureTrust Corporation
-# Label: "Secure Global CA"
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=COMODO Certification Authority O=COMODO CA Limited
-# Subject: CN=COMODO Certification Authority O=COMODO CA Limited
-# Label: "COMODO Certification Authority"
-# Serial: 104350513648249232941998508985834464573
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------BEGIN CERTIFICATE-----
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-# Subject: O=Chunghwa Telecom Co., Ltd. OU=ePKI Root Certification Authority
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------BEGIN CERTIFICATE-----
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-# Subject: CN=GeoTrust Primary Certification Authority - G3 O=GeoTrust Inc. OU=(c) 2008 GeoTrust Inc. - For authorized use only
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-# Subject: CN=thawte Primary Root CA - G2 O=thawte, Inc. OU=(c) 2007 thawte, Inc. - For authorized use only
-# Label: "thawte Primary Root CA - G2"
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-# Subject: CN=thawte Primary Root CA - G3 O=thawte, Inc. OU=Certification Services Division/(c) 2008 thawte, Inc. - For authorized use only
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-# Issuer: CN=GeoTrust Primary Certification Authority - G2 O=GeoTrust Inc. OU=(c) 2007 GeoTrust Inc. - For authorized use only
-# Subject: CN=GeoTrust Primary Certification Authority - G2 O=GeoTrust Inc. OU=(c) 2007 GeoTrust Inc. - For authorized use only
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-# Issuer: CN=VeriSign Universal Root Certification Authority O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 2008 VeriSign, Inc. - For authorized use only
-# Subject: CN=VeriSign Universal Root Certification Authority O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 2008 VeriSign, Inc. - For authorized use only
-# Label: "VeriSign Universal Root Certification Authority"
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------BEGIN CERTIFICATE-----
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-
-# Issuer: CN=VeriSign Class 3 Public Primary Certification Authority - G4 O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 2007 VeriSign, Inc. - For authorized use only
-# Subject: CN=VeriSign Class 3 Public Primary Certification Authority - G4 O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 2007 VeriSign, Inc. - For authorized use only
-# Label: "VeriSign Class 3 Public Primary Certification Authority - G4"
-# Serial: 63143484348153506665311985501458640051
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------BEGIN CERTIFICATE-----
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-# Subject: CN=NetLock Arany (Class Gold) F\u0151tan\xfas\xedtv\xe1ny O=NetLock Kft. OU=Tan\xfas\xedtv\xe1nykiad\xf3k (Certification Services)
-# Label: "NetLock Arany (Class Gold) F\u0151tan\xfas\xedtv\xe1ny"
-# Serial: 80544274841616
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------END CERTIFICATE-----
-
-# Issuer: CN=Staat der Nederlanden Root CA - G2 O=Staat der Nederlanden
-# Subject: CN=Staat der Nederlanden Root CA - G2 O=Staat der Nederlanden
-# Label: "Staat der Nederlanden Root CA - G2"
-# Serial: 10000012
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=Hongkong Post Root CA 1 O=Hongkong Post
-# Subject: CN=Hongkong Post Root CA 1 O=Hongkong Post
-# Label: "Hongkong Post Root CA 1"
-# Serial: 1000
-# MD5 Fingerprint: a8:0d:6f:39:78:b9:43:6d:77:42:6d:98:5a:cc:23:ca
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=SecureSign RootCA11 O=Japan Certification Services, Inc.
-# Subject: CN=SecureSign RootCA11 O=Japan Certification Services, Inc.
-# Label: "SecureSign RootCA11"
-# Serial: 1
-# MD5 Fingerprint: b7:52:74:e2:92:b4:80:93:f2:75:e4:cc:d7:f2:ea:26
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=Microsec e-Szigno Root CA 2009 O=Microsec Ltd.
-# Subject: CN=Microsec e-Szigno Root CA 2009 O=Microsec Ltd.
-# Label: "Microsec e-Szigno Root CA 2009"
-# Serial: 14014712776195784473
-# MD5 Fingerprint: f8:49:f4:03:bc:44:2d:83:be:48:69:7d:29:64:fc:b1
-# SHA1 Fingerprint: 89:df:74:fe:5c:f4:0f:4a:80:f9:e3:37:7d:54:da:91:e1:01:31:8e
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=Chambers of Commerce Root - 2008 O=AC Camerfirma S.A.
-# Subject: CN=Chambers of Commerce Root - 2008 O=AC Camerfirma S.A.
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-# Issuer: CN=Global Chambersign Root - 2008 O=AC Camerfirma S.A.
-# Subject: CN=Global Chambersign Root - 2008 O=AC Camerfirma S.A.
-# Label: "Global Chambersign Root - 2008"
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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------BEGIN CERTIFICATE-----
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------BEGIN CERTIFICATE-----
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-# SHA256 Fingerprint: 55:92:60:84:ec:96:3a:64:b9:6e:2a:be:01:ce:0b:a8:6a:64:fb:fe:bc:c7:aa:b5:af:c1:55:b3:7f:d7:60:66
------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: O=Trustis Limited OU=Trustis FPS Root CA
-# Subject: O=Trustis Limited OU=Trustis FPS Root CA
-# Label: "Trustis FPS Root CA"
-# Serial: 36053640375399034304724988975563710553
-# MD5 Fingerprint: 30:c9:e7:1e:6b:e6:14:eb:65:b2:16:69:20:31:67:4d
-# SHA1 Fingerprint: 3b:c0:38:0b:33:c3:f6:a6:0c:86:15:22:93:d9:df:f5:4b:81:c0:04
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=Buypass Class 2 Root CA O=Buypass AS-983163327
-# Subject: CN=Buypass Class 2 Root CA O=Buypass AS-983163327
-# Label: "Buypass Class 2 Root CA"
-# Serial: 2
-# MD5 Fingerprint: 46:a7:d2:fe:45:fb:64:5a:a8:59:90:9b:78:44:9b:29
-# SHA1 Fingerprint: 49:0a:75:74:de:87:0a:47:fe:58:ee:f6:c7:6b:eb:c6:0b:12:40:99
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=Buypass Class 3 Root CA O=Buypass AS-983163327
-# Subject: CN=Buypass Class 3 Root CA O=Buypass AS-983163327
-# Label: "Buypass Class 3 Root CA"
-# Serial: 2
-# MD5 Fingerprint: 3d:3b:18:9e:2c:64:5a:e8:d5:88:ce:0e:f9:37:c2:ec
-# SHA1 Fingerprint: da:fa:f7:fa:66:84:ec:06:8f:14:50:bd:c7:c2:81:a5:bc:a9:64:57
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=T-TeleSec GlobalRoot Class 3 O=T-Systems Enterprise Services GmbH OU=T-Systems Trust Center
-# Subject: CN=T-TeleSec GlobalRoot Class 3 O=T-Systems Enterprise Services GmbH OU=T-Systems Trust Center
-# Label: "T-TeleSec GlobalRoot Class 3"
-# Serial: 1
-# MD5 Fingerprint: ca:fb:40:a8:4e:39:92:8a:1d:fe:8e:2f:c4:27:ea:ef
-# SHA1 Fingerprint: 55:a6:72:3e:cb:f2:ec:cd:c3:23:74:70:19:9d:2a:be:11:e3:81:d1
-# SHA256 Fingerprint: fd:73:da:d3:1c:64:4f:f1:b4:3b:ef:0c:cd:da:96:71:0b:9c:d9:87:5e:ca:7e:31:70:7a:f3:e9:6d:52:2b:bd
------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=EE Certification Centre Root CA O=AS Sertifitseerimiskeskus
-# Subject: CN=EE Certification Centre Root CA O=AS Sertifitseerimiskeskus
-# Label: "EE Certification Centre Root CA"
-# Serial: 112324828676200291871926431888494945866
-# MD5 Fingerprint: 43:5e:88:d4:7d:1a:4a:7e:fd:84:2e:52:eb:01:d4:6f
-# SHA1 Fingerprint: c9:a8:b9:e7:55:80:5e:58:e3:53:77:a7:25:eb:af:c3:7b:27:cc:d7
-# SHA256 Fingerprint: 3e:84:ba:43:42:90:85:16:e7:75:73:c0:99:2f:09:79:ca:08:4e:46:85:68:1f:f1:95:cc:ba:8a:22:9b:8a:76
------BEGIN CERTIFICATE-----
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-# Issuer: CN=D-TRUST Root Class 3 CA 2 2009 O=D-Trust GmbH
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-# Issuer: CN=D-TRUST Root Class 3 CA 2 EV 2009 O=D-Trust GmbH
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=TWCA Global Root CA O=TAIWAN-CA OU=Root CA
-# Subject: CN=TWCA Global Root CA O=TAIWAN-CA OU=Root CA
-# Label: "TWCA Global Root CA"
-# Serial: 3262
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=TeliaSonera Root CA v1 O=TeliaSonera
-# Subject: CN=TeliaSonera Root CA v1 O=TeliaSonera
-# Label: "TeliaSonera Root CA v1"
-# Serial: 199041966741090107964904287217786801558
-# MD5 Fingerprint: 37:41:49:1b:18:56:9a:26:f5:ad:c2:66:fb:40:a5:4c
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Subject: CN=E-Tugra Certification Authority O=E-Tu\u011fra EBG Bili\u015fim Teknolojileri ve Hizmetleri A.\u015e. OU=E-Tugra Sertifikasyon Merkezi
-# Label: "E-Tugra Certification Authority"
-# Serial: 7667447206703254355
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=T-TeleSec GlobalRoot Class 2 O=T-Systems Enterprise Services GmbH OU=T-Systems Trust Center
-# Subject: CN=T-TeleSec GlobalRoot Class 2 O=T-Systems Enterprise Services GmbH OU=T-Systems Trust Center
-# Label: "T-TeleSec GlobalRoot Class 2"
-# Serial: 1
-# MD5 Fingerprint: 2b:9b:9e:e4:7b:6c:1f:00:72:1a:cc:c1:77:79:df:6a
-# SHA1 Fingerprint: 59:0d:2d:7d:88:4f:40:2e:61:7e:a5:62:32:17:65:cf:17:d8:94:e9
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=Atos TrustedRoot 2011 O=Atos
-# Subject: CN=Atos TrustedRoot 2011 O=Atos
-# Label: "Atos TrustedRoot 2011"
-# Serial: 6643877497813316402
-# MD5 Fingerprint: ae:b9:c4:32:4b:ac:7f:5d:66:cc:77:94:bb:2a:77:56
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-# SHA256 Fingerprint: f3:56:be:a2:44:b7:a9:1e:b3:5d:53:ca:9a:d7:86:4a:ce:01:8e:2d:35:d5:f8:f9:6d:df:68:a6:f4:1a:a4:74
------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=QuoVadis Root CA 1 G3 O=QuoVadis Limited
-# Subject: CN=QuoVadis Root CA 1 G3 O=QuoVadis Limited
-# Label: "QuoVadis Root CA 1 G3"
-# Serial: 687049649626669250736271037606554624078720034195
-# MD5 Fingerprint: a4:bc:5b:3f:fe:37:9a:fa:64:f0:e2:fa:05:3d:0b:ab
-# SHA1 Fingerprint: 1b:8e:ea:57:96:29:1a:c9:39:ea:b8:0a:81:1a:73:73:c0:93:79:67
-# SHA256 Fingerprint: 8a:86:6f:d1:b2:76:b5:7e:57:8e:92:1c:65:82:8a:2b:ed:58:e9:f2:f2:88:05:41:34:b7:f1:f4:bf:c9:cc:74
------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=QuoVadis Root CA 2 G3 O=QuoVadis Limited
-# Subject: CN=QuoVadis Root CA 2 G3 O=QuoVadis Limited
-# Label: "QuoVadis Root CA 2 G3"
-# Serial: 390156079458959257446133169266079962026824725800
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=QuoVadis Root CA 3 G3 O=QuoVadis Limited
-# Subject: CN=QuoVadis Root CA 3 G3 O=QuoVadis Limited
-# Label: "QuoVadis Root CA 3 G3"
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=DigiCert Assured ID Root G2 O=DigiCert Inc OU=www.digicert.com
-# Subject: CN=DigiCert Assured ID Root G2 O=DigiCert Inc OU=www.digicert.com
-# Label: "DigiCert Assured ID Root G2"
-# Serial: 15385348160840213938643033620894905419
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-# SHA1 Fingerprint: a1:4b:48:d9:43:ee:0a:0e:40:90:4f:3c:e0:a4:c0:91:93:51:5d:3f
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=DigiCert Assured ID Root G3 O=DigiCert Inc OU=www.digicert.com
-# Subject: CN=DigiCert Assured ID Root G3 O=DigiCert Inc OU=www.digicert.com
-# Label: "DigiCert Assured ID Root G3"
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=DigiCert Global Root G2 O=DigiCert Inc OU=www.digicert.com
-# Subject: CN=DigiCert Global Root G2 O=DigiCert Inc OU=www.digicert.com
-# Label: "DigiCert Global Root G2"
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=DigiCert Global Root G3 O=DigiCert Inc OU=www.digicert.com
-# Subject: CN=DigiCert Global Root G3 O=DigiCert Inc OU=www.digicert.com
-# Label: "DigiCert Global Root G3"
-# Serial: 7089244469030293291760083333884364146
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=DigiCert Trusted Root G4 O=DigiCert Inc OU=www.digicert.com
-# Subject: CN=DigiCert Trusted Root G4 O=DigiCert Inc OU=www.digicert.com
-# Label: "DigiCert Trusted Root G4"
-# Serial: 7451500558977370777930084869016614236
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=COMODO RSA Certification Authority O=COMODO CA Limited
-# Subject: CN=COMODO RSA Certification Authority O=COMODO CA Limited
-# Label: "COMODO RSA Certification Authority"
-# Serial: 101909084537582093308941363524873193117
-# MD5 Fingerprint: 1b:31:b0:71:40:36:cc:14:36:91:ad:c4:3e:fd:ec:18
-# SHA1 Fingerprint: af:e5:d2:44:a8:d1:19:42:30:ff:47:9f:e2:f8:97:bb:cd:7a:8c:b4
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=USERTrust RSA Certification Authority O=The USERTRUST Network
-# Subject: CN=USERTrust RSA Certification Authority O=The USERTRUST Network
-# Label: "USERTrust RSA Certification Authority"
-# Serial: 2645093764781058787591871645665788717
-# MD5 Fingerprint: 1b:fe:69:d1:91:b7:19:33:a3:72:a8:0f:e1:55:e5:b5
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=USERTrust ECC Certification Authority O=The USERTRUST Network
-# Subject: CN=USERTrust ECC Certification Authority O=The USERTRUST Network
-# Label: "USERTrust ECC Certification Authority"
-# Serial: 123013823720199481456569720443997572134
-# MD5 Fingerprint: fa:68:bc:d9:b5:7f:ad:fd:c9:1d:06:83:28:cc:24:c1
-# SHA1 Fingerprint: d1:cb:ca:5d:b2:d5:2a:7f:69:3b:67:4d:e5:f0:5a:1d:0c:95:7d:f0
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=GlobalSign O=GlobalSign OU=GlobalSign ECC Root CA - R4
-# Subject: CN=GlobalSign O=GlobalSign OU=GlobalSign ECC Root CA - R4
-# Label: "GlobalSign ECC Root CA - R4"
-# Serial: 14367148294922964480859022125800977897474
-# MD5 Fingerprint: 20:f0:27:68:d1:7e:a0:9d:0e:e6:2a:ca:df:5c:89:8e
-# SHA1 Fingerprint: 69:69:56:2e:40:80:f4:24:a1:e7:19:9f:14:ba:f3:ee:58:ab:6a:bb
-# SHA256 Fingerprint: be:c9:49:11:c2:95:56:76:db:6c:0a:55:09:86:d7:6e:3b:a0:05:66:7c:44:2c:97:62:b4:fb:b7:73:de:22:8c
------BEGIN CERTIFICATE-----
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-# Issuer: CN=GlobalSign O=GlobalSign OU=GlobalSign ECC Root CA - R5
-# Subject: CN=GlobalSign O=GlobalSign OU=GlobalSign ECC Root CA - R5
-# Label: "GlobalSign ECC Root CA - R5"
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=Staat der Nederlanden Root CA - G3 O=Staat der Nederlanden
-# Subject: CN=Staat der Nederlanden Root CA - G3 O=Staat der Nederlanden
-# Label: "Staat der Nederlanden Root CA - G3"
-# Serial: 10003001
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=Staat der Nederlanden EV Root CA O=Staat der Nederlanden
-# Subject: CN=Staat der Nederlanden EV Root CA O=Staat der Nederlanden
-# Label: "Staat der Nederlanden EV Root CA"
-# Serial: 10000013
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=IdenTrust Commercial Root CA 1 O=IdenTrust
-# Subject: CN=IdenTrust Commercial Root CA 1 O=IdenTrust
-# Label: "IdenTrust Commercial Root CA 1"
-# Serial: 13298821034946342390520003877796839426
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=IdenTrust Public Sector Root CA 1 O=IdenTrust
-# Subject: CN=IdenTrust Public Sector Root CA 1 O=IdenTrust
-# Label: "IdenTrust Public Sector Root CA 1"
-# Serial: 13298821034946342390521976156843933698
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=Entrust Root Certification Authority - G2 O=Entrust, Inc. OU=See www.entrust.net/legal-terms/(c) 2009 Entrust, Inc. - for authorized use only
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-# Label: "Entrust Root Certification Authority - G2"
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-# Issuer: CN=Certum Trusted Network CA 2 O=Unizeto Technologies S.A. OU=Certum Certification Authority
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------BEGIN CERTIFICATE-----
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-
-# Issuer: CN=Amazon Root CA 2 O=Amazon
-# Subject: CN=Amazon Root CA 2 O=Amazon
-# Label: "Amazon Root CA 2"
-# Serial: 143266982885963551818349160658925006970653239
-# MD5 Fingerprint: c8:e5:8d:ce:a8:42:e2:7a:c0:2a:5c:7c:9e:26:bf:66
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=Amazon Root CA 3 O=Amazon
-# Subject: CN=Amazon Root CA 3 O=Amazon
-# Label: "Amazon Root CA 3"
-# Serial: 143266986699090766294700635381230934788665930
-# MD5 Fingerprint: a0:d4:ef:0b:f7:b5:d8:49:95:2a:ec:f5:c4:fc:81:87
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=Amazon Root CA 4 O=Amazon
-# Subject: CN=Amazon Root CA 4 O=Amazon
-# Label: "Amazon Root CA 4"
-# Serial: 143266989758080763974105200630763877849284878
-# MD5 Fingerprint: 89:bc:27:d5:eb:17:8d:06:6a:69:d5:fd:89:47:b4:cd
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=LuxTrust Global Root 2 O=LuxTrust S.A.
-# Subject: CN=LuxTrust Global Root 2 O=LuxTrust S.A.
-# Label: "LuxTrust Global Root 2"
-# Serial: 59914338225734147123941058376788110305822489521
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=TUBITAK Kamu SM SSL Kok Sertifikasi - Surum 1 O=Turkiye Bilimsel ve Teknolojik Arastirma Kurumu - TUBITAK OU=Kamu Sertifikasyon Merkezi - Kamu SM
-# Subject: CN=TUBITAK Kamu SM SSL Kok Sertifikasi - Surum 1 O=Turkiye Bilimsel ve Teknolojik Arastirma Kurumu - TUBITAK OU=Kamu Sertifikasyon Merkezi - Kamu SM
-# Label: "TUBITAK Kamu SM SSL Kok Sertifikasi - Surum 1"
-# Serial: 1
-# MD5 Fingerprint: dc:00:81:dc:69:2f:3e:2f:b0:3b:f6:3d:5a:91:8e:49
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=GDCA TrustAUTH R5 ROOT O=GUANG DONG CERTIFICATE AUTHORITY CO.,LTD.
-# Subject: CN=GDCA TrustAUTH R5 ROOT O=GUANG DONG CERTIFICATE AUTHORITY CO.,LTD.
-# Label: "GDCA TrustAUTH R5 ROOT"
-# Serial: 9009899650740120186
-# MD5 Fingerprint: 63:cc:d9:3d:34:35:5c:6f:53:a3:e2:08:70:48:1f:b4
-# SHA1 Fingerprint: 0f:36:38:5b:81:1a:25:c3:9b:31:4e:83:ca:e9:34:66:70:cc:74:b4
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------BEGIN CERTIFICATE-----
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-# Subject: CN=TrustCor RootCert CA-1 O=TrustCor Systems S. de R.L. OU=TrustCor Certificate Authority
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-# Subject: CN=TrustCor RootCert CA-2 O=TrustCor Systems S. de R.L. OU=TrustCor Certificate Authority
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-# Issuer: CN=TrustCor ECA-1 O=TrustCor Systems S. de R.L. OU=TrustCor Certificate Authority
-# Subject: CN=TrustCor ECA-1 O=TrustCor Systems S. de R.L. OU=TrustCor Certificate Authority
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=SSL.com Root Certification Authority RSA O=SSL Corporation
-# Subject: CN=SSL.com Root Certification Authority RSA O=SSL Corporation
-# Label: "SSL.com Root Certification Authority RSA"
-# Serial: 8875640296558310041
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=SSL.com Root Certification Authority ECC O=SSL Corporation
-# Subject: CN=SSL.com Root Certification Authority ECC O=SSL Corporation
-# Label: "SSL.com Root Certification Authority ECC"
-# Serial: 8495723813297216424
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=SSL.com EV Root Certification Authority RSA R2 O=SSL Corporation
-# Subject: CN=SSL.com EV Root Certification Authority RSA R2 O=SSL Corporation
-# Label: "SSL.com EV Root Certification Authority RSA R2"
-# Serial: 6248227494352943350
-# MD5 Fingerprint: e1:1e:31:58:1a:ae:54:53:02:f6:17:6a:11:7b:4d:95
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-# SHA256 Fingerprint: 2e:7b:f1:6c:c2:24:85:a7:bb:e2:aa:86:96:75:07:61:b0:ae:39:be:3b:2f:e9:d0:cc:6d:4e:f7:34:91:42:5c
------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=SSL.com EV Root Certification Authority ECC O=SSL Corporation
-# Subject: CN=SSL.com EV Root Certification Authority ECC O=SSL Corporation
-# Label: "SSL.com EV Root Certification Authority ECC"
-# Serial: 3182246526754555285
-# MD5 Fingerprint: 59:53:22:65:83:42:01:54:c0:ce:42:b9:5a:7c:f2:90
-# SHA1 Fingerprint: 4c:dd:51:a3:d1:f5:20:32:14:b0:c6:c5:32:23:03:91:c7:46:42:6d
-# SHA256 Fingerprint: 22:a2:c1:f7:bd:ed:70:4c:c1:e7:01:b5:f4:08:c3:10:88:0f:e9:56:b5:de:2a:4a:44:f9:9c:87:3a:25:a7:c8
------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=GlobalSign O=GlobalSign OU=GlobalSign Root CA - R6
-# Subject: CN=GlobalSign O=GlobalSign OU=GlobalSign Root CA - R6
-# Label: "GlobalSign Root CA - R6"
-# Serial: 1417766617973444989252670301619537
-# MD5 Fingerprint: 4f:dd:07:e4:d4:22:64:39:1e:0c:37:42:ea:d1:c6:ae
-# SHA1 Fingerprint: 80:94:64:0e:b5:a7:a1:ca:11:9c:1f:dd:d5:9f:81:02:63:a7:fb:d1
-# SHA256 Fingerprint: 2c:ab:ea:fe:37:d0:6c:a2:2a:ba:73:91:c0:03:3d:25:98:29:52:c4:53:64:73:49:76:3a:3a:b5:ad:6c:cf:69
------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=OISTE WISeKey Global Root GC CA O=WISeKey OU=OISTE Foundation Endorsed
-# Subject: CN=OISTE WISeKey Global Root GC CA O=WISeKey OU=OISTE Foundation Endorsed
-# Label: "OISTE WISeKey Global Root GC CA"
-# Serial: 44084345621038548146064804565436152554
-# MD5 Fingerprint: a9:d6:b9:2d:2f:93:64:f8:a5:69:ca:91:e9:68:07:23
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=GTS Root R1 O=Google Trust Services LLC
-# Subject: CN=GTS Root R1 O=Google Trust Services LLC
-# Label: "GTS Root R1"
-# Serial: 146587175971765017618439757810265552097
-# MD5 Fingerprint: 82:1a:ef:d4:d2:4a:f2:9f:e2:3d:97:06:14:70:72:85
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=GTS Root R2 O=Google Trust Services LLC
-# Subject: CN=GTS Root R2 O=Google Trust Services LLC
-# Label: "GTS Root R2"
-# Serial: 146587176055767053814479386953112547951
-# MD5 Fingerprint: 44:ed:9a:0e:a4:09:3b:00:f2:ae:4c:a3:c6:61:b0:8b
-# SHA1 Fingerprint: d2:73:96:2a:2a:5e:39:9f:73:3f:e1:c7:1e:64:3f:03:38:34:fc:4d
-# SHA256 Fingerprint: c4:5d:7b:b0:8e:6d:67:e6:2e:42:35:11:0b:56:4e:5f:78:fd:92:ef:05:8c:84:0a:ea:4e:64:55:d7:58:5c:60
------BEGIN CERTIFICATE-----
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------BEGIN CERTIFICATE-----
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-# Subject: CN=Entrust Root Certification Authority - G4 O=Entrust, Inc. OU=See www.entrust.net/legal-terms/(c) 2015 Entrust, Inc. - for authorized use only
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-IQ6SwJAfzyBfyjs4x7dtOvPmRLgOMWuIjnDrnBdSqEGULoe256YSxXXfW8AKbnuk
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-n/PIjhs4ViFqUZPTkcpG2om3PVODLAgfi49T3f+sHw==
------END CERTIFICATE-----
diff --git a/venv/lib/python3.7/site-packages/certifi/core.py b/venv/lib/python3.7/site-packages/certifi/core.py
deleted file mode 100644
index 7271acf..0000000
--- a/venv/lib/python3.7/site-packages/certifi/core.py
+++ /dev/null
@@ -1,15 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-certifi.py
-~~~~~~~~~~
-
-This module returns the installation location of cacert.pem.
-"""
-import os
-
-
-def where():
-    f = os.path.dirname(__file__)
-
-    return os.path.join(f, 'cacert.pem')
diff --git a/venv/lib/python3.7/site-packages/chardet-3.0.4.dist-info/DESCRIPTION.rst b/venv/lib/python3.7/site-packages/chardet-3.0.4.dist-info/DESCRIPTION.rst
deleted file mode 100644
index c0f044d..0000000
--- a/venv/lib/python3.7/site-packages/chardet-3.0.4.dist-info/DESCRIPTION.rst
+++ /dev/null
@@ -1,70 +0,0 @@
-Chardet: The Universal Character Encoding Detector
---------------------------------------------------
-
-.. image:: https://img.shields.io/travis/chardet/chardet/stable.svg
-   :alt: Build status
-   :target: https://travis-ci.org/chardet/chardet
-
-.. image:: https://img.shields.io/coveralls/chardet/chardet/stable.svg
-   :target: https://coveralls.io/r/chardet/chardet
-
-.. image:: https://img.shields.io/pypi/v/chardet.svg
-   :target: https://warehouse.python.org/project/chardet/
-   :alt: Latest version on PyPI
-
-.. image:: https://img.shields.io/pypi/l/chardet.svg
-   :alt: License
-
-
-Detects
- - ASCII, UTF-8, UTF-16 (2 variants), UTF-32 (4 variants)
- - Big5, GB2312, EUC-TW, HZ-GB-2312, ISO-2022-CN (Traditional and Simplified Chinese)
- - EUC-JP, SHIFT_JIS, CP932, ISO-2022-JP (Japanese)
- - EUC-KR, ISO-2022-KR (Korean)
- - KOI8-R, MacCyrillic, IBM855, IBM866, ISO-8859-5, windows-1251 (Cyrillic)
- - ISO-8859-5, windows-1251 (Bulgarian)
- - ISO-8859-1, windows-1252 (Western European languages)
- - ISO-8859-7, windows-1253 (Greek)
- - ISO-8859-8, windows-1255 (Visual and Logical Hebrew)
- - TIS-620 (Thai)
-
-.. note::
-   Our ISO-8859-2 and windows-1250 (Hungarian) probers have been temporarily
-   disabled until we can retrain the models.
-
-Requires Python 2.6, 2.7, or 3.3+.
-
-Installation
-------------
-
-Install from `PyPI <https://pypi.python.org/pypi/chardet>`_::
-
-    pip install chardet
-
-Documentation
--------------
-
-For users, docs are now available at https://chardet.readthedocs.io/.
-
-Command-line Tool
------------------
-
-chardet comes with a command-line script which reports on the encodings of one
-or more files::
-
-    % chardetect somefile someotherfile
-    somefile: windows-1252 with confidence 0.5
-    someotherfile: ascii with confidence 1.0
-
-About
------
-
-This is a continuation of Mark Pilgrim's excellent chardet. Previously, two
-versions needed to be maintained: one that supported python 2.x and one that
-supported python 3.x.  We've recently merged with `Ian Cordasco <https://github.com/sigmavirus24>`_'s
-`charade <https://github.com/sigmavirus24/charade>`_ fork, so now we have one
-coherent version that works for Python 2.6+.
-
-:maintainer: Dan Blanchard
-
-
diff --git a/venv/lib/python3.7/site-packages/chardet-3.0.4.dist-info/INSTALLER b/venv/lib/python3.7/site-packages/chardet-3.0.4.dist-info/INSTALLER
deleted file mode 100644
index a1b589e..0000000
--- a/venv/lib/python3.7/site-packages/chardet-3.0.4.dist-info/INSTALLER
+++ /dev/null
@@ -1 +0,0 @@
-pip
diff --git a/venv/lib/python3.7/site-packages/chardet-3.0.4.dist-info/METADATA b/venv/lib/python3.7/site-packages/chardet-3.0.4.dist-info/METADATA
deleted file mode 100644
index 1427867..0000000
--- a/venv/lib/python3.7/site-packages/chardet-3.0.4.dist-info/METADATA
+++ /dev/null
@@ -1,96 +0,0 @@
-Metadata-Version: 2.0
-Name: chardet
-Version: 3.0.4
-Summary: Universal encoding detector for Python 2 and 3
-Home-page: https://github.com/chardet/chardet
-Author: Daniel Blanchard
-Author-email: dan.blanchard@gmail.com
-License: LGPL
-Keywords: encoding,i18n,xml
-Platform: UNKNOWN
-Classifier: Development Status :: 4 - Beta
-Classifier: Intended Audience :: Developers
-Classifier: License :: OSI Approved :: GNU Library or Lesser General Public License (LGPL)
-Classifier: Operating System :: OS Independent
-Classifier: Programming Language :: Python
-Classifier: Programming Language :: Python :: 2
-Classifier: Programming Language :: Python :: 2.6
-Classifier: Programming Language :: Python :: 2.7
-Classifier: Programming Language :: Python :: 3
-Classifier: Programming Language :: Python :: 3.3
-Classifier: Programming Language :: Python :: 3.4
-Classifier: Programming Language :: Python :: 3.5
-Classifier: Programming Language :: Python :: 3.6
-Classifier: Topic :: Software Development :: Libraries :: Python Modules
-Classifier: Topic :: Text Processing :: Linguistic
-
-Chardet: The Universal Character Encoding Detector
---------------------------------------------------
-
-.. image:: https://img.shields.io/travis/chardet/chardet/stable.svg
-   :alt: Build status
-   :target: https://travis-ci.org/chardet/chardet
-
-.. image:: https://img.shields.io/coveralls/chardet/chardet/stable.svg
-   :target: https://coveralls.io/r/chardet/chardet
-
-.. image:: https://img.shields.io/pypi/v/chardet.svg
-   :target: https://warehouse.python.org/project/chardet/
-   :alt: Latest version on PyPI
-
-.. image:: https://img.shields.io/pypi/l/chardet.svg
-   :alt: License
-
-
-Detects
- - ASCII, UTF-8, UTF-16 (2 variants), UTF-32 (4 variants)
- - Big5, GB2312, EUC-TW, HZ-GB-2312, ISO-2022-CN (Traditional and Simplified Chinese)
- - EUC-JP, SHIFT_JIS, CP932, ISO-2022-JP (Japanese)
- - EUC-KR, ISO-2022-KR (Korean)
- - KOI8-R, MacCyrillic, IBM855, IBM866, ISO-8859-5, windows-1251 (Cyrillic)
- - ISO-8859-5, windows-1251 (Bulgarian)
- - ISO-8859-1, windows-1252 (Western European languages)
- - ISO-8859-7, windows-1253 (Greek)
- - ISO-8859-8, windows-1255 (Visual and Logical Hebrew)
- - TIS-620 (Thai)
-
-.. note::
-   Our ISO-8859-2 and windows-1250 (Hungarian) probers have been temporarily
-   disabled until we can retrain the models.
-
-Requires Python 2.6, 2.7, or 3.3+.
-
-Installation
-------------
-
-Install from `PyPI <https://pypi.python.org/pypi/chardet>`_::
-
-    pip install chardet
-
-Documentation
--------------
-
-For users, docs are now available at https://chardet.readthedocs.io/.
-
-Command-line Tool
------------------
-
-chardet comes with a command-line script which reports on the encodings of one
-or more files::
-
-    % chardetect somefile someotherfile
-    somefile: windows-1252 with confidence 0.5
-    someotherfile: ascii with confidence 1.0
-
-About
------
-
-This is a continuation of Mark Pilgrim's excellent chardet. Previously, two
-versions needed to be maintained: one that supported python 2.x and one that
-supported python 3.x.  We've recently merged with `Ian Cordasco <https://github.com/sigmavirus24>`_'s
-`charade <https://github.com/sigmavirus24/charade>`_ fork, so now we have one
-coherent version that works for Python 2.6+.
-
-:maintainer: Dan Blanchard
-
-
diff --git a/venv/lib/python3.7/site-packages/chardet-3.0.4.dist-info/RECORD b/venv/lib/python3.7/site-packages/chardet-3.0.4.dist-info/RECORD
deleted file mode 100644
index 2740f3f..0000000
--- a/venv/lib/python3.7/site-packages/chardet-3.0.4.dist-info/RECORD
+++ /dev/null
@@ -1,91 +0,0 @@
-../../../bin/chardetect,sha256=jUNQauPaQnX5_WVyQ21crfNyR7-as49GxQ5AYwGcevc,266
-chardet-3.0.4.dist-info/DESCRIPTION.rst,sha256=PQ4sBsMyKFZkjC6QpmbpLn0UtCNyeb-ZqvCGEgyZMGk,2174
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-chardet-3.0.4.dist-info/entry_points.txt,sha256=fAMmhu5eJ-zAJ-smfqQwRClQ3-nozOCmvJ6-E8lgGJo,60
-chardet-3.0.4.dist-info/metadata.json,sha256=0htbRM18ujyGZDdfowgAqj6Hq2eQtwzwyhaEveKntgo,1375
-chardet-3.0.4.dist-info/top_level.txt,sha256=AowzBbZy4x8EirABDdJSLJZMkJ_53iIag8xfKR6D7kI,8
-chardet/__init__.py,sha256=YsP5wQlsHJ2auF1RZJfypiSrCA7_bQiRm3ES_NI76-Y,1559
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-chardet/__pycache__/chardistribution.cpython-37.pyc,,
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-chardet/__pycache__/codingstatemachine.cpython-37.pyc,,
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-chardet/__pycache__/cp949prober.cpython-37.pyc,,
-chardet/__pycache__/enums.cpython-37.pyc,,
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-chardet/__pycache__/euckrprober.cpython-37.pyc,,
-chardet/__pycache__/euctwfreq.cpython-37.pyc,,
-chardet/__pycache__/euctwprober.cpython-37.pyc,,
-chardet/__pycache__/gb2312freq.cpython-37.pyc,,
-chardet/__pycache__/gb2312prober.cpython-37.pyc,,
-chardet/__pycache__/hebrewprober.cpython-37.pyc,,
-chardet/__pycache__/jisfreq.cpython-37.pyc,,
-chardet/__pycache__/jpcntx.cpython-37.pyc,,
-chardet/__pycache__/langbulgarianmodel.cpython-37.pyc,,
-chardet/__pycache__/langcyrillicmodel.cpython-37.pyc,,
-chardet/__pycache__/langgreekmodel.cpython-37.pyc,,
-chardet/__pycache__/langhebrewmodel.cpython-37.pyc,,
-chardet/__pycache__/langhungarianmodel.cpython-37.pyc,,
-chardet/__pycache__/langthaimodel.cpython-37.pyc,,
-chardet/__pycache__/langturkishmodel.cpython-37.pyc,,
-chardet/__pycache__/latin1prober.cpython-37.pyc,,
-chardet/__pycache__/mbcharsetprober.cpython-37.pyc,,
-chardet/__pycache__/mbcsgroupprober.cpython-37.pyc,,
-chardet/__pycache__/mbcssm.cpython-37.pyc,,
-chardet/__pycache__/sbcharsetprober.cpython-37.pyc,,
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-chardet/__pycache__/universaldetector.cpython-37.pyc,,
-chardet/__pycache__/utf8prober.cpython-37.pyc,,
-chardet/__pycache__/version.cpython-37.pyc,,
-chardet/big5freq.py,sha256=D_zK5GyzoVsRes0HkLJziltFQX0bKCLOrFe9_xDvO_8,31254
-chardet/big5prober.py,sha256=kBxHbdetBpPe7xrlb-e990iot64g_eGSLd32lB7_h3M,1757
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-chardet/utf8prober.py,sha256=IdD8v3zWOsB8OLiyPi-y_fqwipRFxV9Nc1eKBLSuIEw,2766
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diff --git a/venv/lib/python3.7/site-packages/chardet-3.0.4.dist-info/WHEEL b/venv/lib/python3.7/site-packages/chardet-3.0.4.dist-info/WHEEL
deleted file mode 100644
index 8b6dd1b..0000000
--- a/venv/lib/python3.7/site-packages/chardet-3.0.4.dist-info/WHEEL
+++ /dev/null
@@ -1,6 +0,0 @@
-Wheel-Version: 1.0
-Generator: bdist_wheel (0.29.0)
-Root-Is-Purelib: true
-Tag: py2-none-any
-Tag: py3-none-any
-
diff --git a/venv/lib/python3.7/site-packages/chardet-3.0.4.dist-info/entry_points.txt b/venv/lib/python3.7/site-packages/chardet-3.0.4.dist-info/entry_points.txt
deleted file mode 100644
index a884269..0000000
--- a/venv/lib/python3.7/site-packages/chardet-3.0.4.dist-info/entry_points.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-[console_scripts]
-chardetect = chardet.cli.chardetect:main
-
diff --git a/venv/lib/python3.7/site-packages/chardet-3.0.4.dist-info/metadata.json b/venv/lib/python3.7/site-packages/chardet-3.0.4.dist-info/metadata.json
deleted file mode 100644
index 8cdf025..0000000
--- a/venv/lib/python3.7/site-packages/chardet-3.0.4.dist-info/metadata.json
+++ /dev/null
@@ -1 +0,0 @@
-{"classifiers": ["Development Status :: 4 - Beta", "Intended Audience :: Developers", "License :: OSI Approved :: GNU Library or Lesser General Public License (LGPL)", "Operating System :: OS Independent", "Programming Language :: Python", "Programming Language :: Python :: 2", "Programming Language :: Python :: 2.6", "Programming Language :: Python :: 2.7", "Programming Language :: Python :: 3", "Programming Language :: Python :: 3.3", "Programming Language :: Python :: 3.4", "Programming Language :: Python :: 3.5", "Programming Language :: Python :: 3.6", "Topic :: Software Development :: Libraries :: Python Modules", "Topic :: Text Processing :: Linguistic"], "extensions": {"python.commands": {"wrap_console": {"chardetect": "chardet.cli.chardetect:main"}}, "python.details": {"contacts": [{"email": "dan.blanchard@gmail.com", "name": "Daniel Blanchard", "role": "author"}], "document_names": {"description": "DESCRIPTION.rst"}, "project_urls": {"Home": "https://github.com/chardet/chardet"}}, "python.exports": {"console_scripts": {"chardetect": "chardet.cli.chardetect:main"}}}, "generator": "bdist_wheel (0.29.0)", "keywords": ["encoding", "i18n", "xml"], "license": "LGPL", "metadata_version": "2.0", "name": "chardet", "summary": "Universal encoding detector for Python 2 and 3", "test_requires": [{"requires": ["hypothesis", "pytest"]}], "version": "3.0.4"}
\ No newline at end of file
diff --git a/venv/lib/python3.7/site-packages/chardet-3.0.4.dist-info/top_level.txt b/venv/lib/python3.7/site-packages/chardet-3.0.4.dist-info/top_level.txt
deleted file mode 100644
index 79236f2..0000000
--- a/venv/lib/python3.7/site-packages/chardet-3.0.4.dist-info/top_level.txt
+++ /dev/null
@@ -1 +0,0 @@
-chardet
diff --git a/venv/lib/python3.7/site-packages/chardet/__init__.py b/venv/lib/python3.7/site-packages/chardet/__init__.py
deleted file mode 100644
index 0f9f820..0000000
--- a/venv/lib/python3.7/site-packages/chardet/__init__.py
+++ /dev/null
@@ -1,39 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-
-from .compat import PY2, PY3
-from .universaldetector import UniversalDetector
-from .version import __version__, VERSION
-
-
-def detect(byte_str):
-    """
-    Detect the encoding of the given byte string.
-
-    :param byte_str:     The byte sequence to examine.
-    :type byte_str:      ``bytes`` or ``bytearray``
-    """
-    if not isinstance(byte_str, bytearray):
-        if not isinstance(byte_str, bytes):
-            raise TypeError('Expected object of type bytes or bytearray, got: '
-                            '{0}'.format(type(byte_str)))
-        else:
-            byte_str = bytearray(byte_str)
-    detector = UniversalDetector()
-    detector.feed(byte_str)
-    return detector.close()
diff --git a/venv/lib/python3.7/site-packages/chardet/big5freq.py b/venv/lib/python3.7/site-packages/chardet/big5freq.py
deleted file mode 100644
index 38f3251..0000000
--- a/venv/lib/python3.7/site-packages/chardet/big5freq.py
+++ /dev/null
@@ -1,386 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-# Big5 frequency table
-# by Taiwan's Mandarin Promotion Council
-# <http://www.edu.tw:81/mandr/>
-#
-# 128  --> 0.42261
-# 256  --> 0.57851
-# 512  --> 0.74851
-# 1024 --> 0.89384
-# 2048 --> 0.97583
-#
-# Ideal Distribution Ratio = 0.74851/(1-0.74851) =2.98
-# Random Distribution Ration = 512/(5401-512)=0.105
-#
-# Typical Distribution Ratio about 25% of Ideal one, still much higher than RDR
-
-BIG5_TYPICAL_DISTRIBUTION_RATIO = 0.75
-
-#Char to FreqOrder table
-BIG5_TABLE_SIZE = 5376
-
-BIG5_CHAR_TO_FREQ_ORDER = (
-   1,1801,1506, 255,1431, 198,   9,  82,   6,5008, 177, 202,3681,1256,2821, 110, #   16
-3814,  33,3274, 261,  76,  44,2114,  16,2946,2187,1176, 659,3971,  26,3451,2653, #   32
-1198,3972,3350,4202, 410,2215, 302, 590, 361,1964,   8, 204,  58,4510,5009,1932, #   48
-  63,5010,5011, 317,1614,  75, 222, 159,4203,2417,1480,5012,3555,3091, 224,2822, #   64
-3682,   3,  10,3973,1471,  29,2787,1135,2866,1940, 873, 130,3275,1123, 312,5013, #   80
-4511,2052, 507, 252, 682,5014, 142,1915, 124, 206,2947,  34,3556,3204,  64, 604, #   96
-5015,2501,1977,1978, 155,1991, 645, 641,1606,5016,3452, 337,  72, 406,5017,  80, #  112
- 630, 238,3205,1509, 263, 939,1092,2654, 756,1440,1094,3453, 449,  69,2987, 591, #  128
- 179,2096, 471, 115,2035,1844,  60,  50,2988, 134, 806,1869, 734,2036,3454, 180, #  144
- 995,1607, 156, 537,2907, 688,5018, 319,1305, 779,2145, 514,2379, 298,4512, 359, #  160
-2502,  90,2716,1338, 663,  11, 906,1099,2553,  20,2441, 182, 532,1716,5019, 732, #  176
-1376,4204,1311,1420,3206,  25,2317,1056, 113, 399, 382,1950, 242,3455,2474, 529, #  192
-3276, 475,1447,3683,5020, 117,  21, 656, 810,1297,2300,2334,3557,5021, 126,4205, #  208
- 706, 456, 150, 613,4513,  71,1118,2037,4206, 145,3092,  85, 835, 486,2115,1246, #  224
-1426, 428, 727,1285,1015, 800, 106, 623, 303,1281,5022,2128,2359, 347,3815, 221, #  240
-3558,3135,5023,1956,1153,4207,  83, 296,1199,3093, 192, 624,  93,5024, 822,1898, #  256
-2823,3136, 795,2065, 991,1554,1542,1592,  27,  43,2867, 859, 139,1456, 860,4514, #  272
- 437, 712,3974, 164,2397,3137, 695, 211,3037,2097, 195,3975,1608,3559,3560,3684, #  288
-3976, 234, 811,2989,2098,3977,2233,1441,3561,1615,2380, 668,2077,1638, 305, 228, #  304
-1664,4515, 467, 415,5025, 262,2099,1593, 239, 108, 300, 200,1033, 512,1247,2078, #  320
-5026,5027,2176,3207,3685,2682, 593, 845,1062,3277,  88,1723,2038,3978,1951, 212, #  336
- 266, 152, 149, 468,1899,4208,4516,  77, 187,5028,3038,  37,   5,2990,5029,3979, #  352
-5030,5031,  39,2524,4517,2908,3208,2079,  55, 148,  74,4518, 545, 483,1474,1029, #  368
-1665, 217,1870,1531,3138,1104,2655,4209,  24, 172,3562, 900,3980,3563,3564,4519, #  384
-  32,1408,2824,1312, 329, 487,2360,2251,2717, 784,2683,   4,3039,3351,1427,1789, #  400
- 188, 109, 499,5032,3686,1717,1790, 888,1217,3040,4520,5033,3565,5034,3352,1520, #  416
-3687,3981, 196,1034, 775,5035,5036, 929,1816, 249, 439,  38,5037,1063,5038, 794, #  432
-3982,1435,2301,  46, 178,3278,2066,5039,2381,5040, 214,1709,4521, 804,  35, 707, #  448
- 324,3688,1601,2554, 140, 459,4210,5041,5042,1365, 839, 272, 978,2262,2580,3456, #  464
-2129,1363,3689,1423, 697, 100,3094,  48,  70,1231, 495,3139,2196,5043,1294,5044, #  480
-2080, 462, 586,1042,3279, 853, 256, 988, 185,2382,3457,1698, 434,1084,5045,3458, #  496
- 314,2625,2788,4522,2335,2336, 569,2285, 637,1817,2525, 757,1162,1879,1616,3459, #  512
- 287,1577,2116, 768,4523,1671,2868,3566,2526,1321,3816, 909,2418,5046,4211, 933, #  528
-3817,4212,2053,2361,1222,4524, 765,2419,1322, 786,4525,5047,1920,1462,1677,2909, #  544
-1699,5048,4526,1424,2442,3140,3690,2600,3353,1775,1941,3460,3983,4213, 309,1369, #  560
-1130,2825, 364,2234,1653,1299,3984,3567,3985,3986,2656, 525,1085,3041, 902,2001, #  576
-1475, 964,4527, 421,1845,1415,1057,2286, 940,1364,3141, 376,4528,4529,1381,   7, #  592
-2527, 983,2383, 336,1710,2684,1846, 321,3461, 559,1131,3042,2752,1809,1132,1313, #  608
- 265,1481,1858,5049, 352,1203,2826,3280, 167,1089, 420,2827, 776, 792,1724,3568, #  624
-4214,2443,3281,5050,4215,5051, 446, 229, 333,2753, 901,3818,1200,1557,4530,2657, #  640
-1921, 395,2754,2685,3819,4216,1836, 125, 916,3209,2626,4531,5052,5053,3820,5054, #  656
-5055,5056,4532,3142,3691,1133,2555,1757,3462,1510,2318,1409,3569,5057,2146, 438, #  672
-2601,2910,2384,3354,1068, 958,3043, 461, 311,2869,2686,4217,1916,3210,4218,1979, #  688
- 383, 750,2755,2627,4219, 274, 539, 385,1278,1442,5058,1154,1965, 384, 561, 210, #  704
-  98,1295,2556,3570,5059,1711,2420,1482,3463,3987,2911,1257, 129,5060,3821, 642, #  720
- 523,2789,2790,2658,5061, 141,2235,1333,  68, 176, 441, 876, 907,4220, 603,2602, #  736
- 710, 171,3464, 404, 549,  18,3143,2398,1410,3692,1666,5062,3571,4533,2912,4534, #  752
-5063,2991, 368,5064, 146, 366,  99, 871,3693,1543, 748, 807,1586,1185,  22,2263, #  768
- 379,3822,3211,5065,3212, 505,1942,2628,1992,1382,2319,5066, 380,2362, 218, 702, #  784
-1818,1248,3465,3044,3572,3355,3282,5067,2992,3694, 930,3283,3823,5068,  59,5069, #  800
- 585, 601,4221, 497,3466,1112,1314,4535,1802,5070,1223,1472,2177,5071, 749,1837, #  816
- 690,1900,3824,1773,3988,1476, 429,1043,1791,2236,2117, 917,4222, 447,1086,1629, #  832
-5072, 556,5073,5074,2021,1654, 844,1090, 105, 550, 966,1758,2828,1008,1783, 686, #  848
-1095,5075,2287, 793,1602,5076,3573,2603,4536,4223,2948,2302,4537,3825, 980,2503, #  864
- 544, 353, 527,4538, 908,2687,2913,5077, 381,2629,1943,1348,5078,1341,1252, 560, #  880
-3095,5079,3467,2870,5080,2054, 973, 886,2081, 143,4539,5081,5082, 157,3989, 496, #  896
-4224,  57, 840, 540,2039,4540,4541,3468,2118,1445, 970,2264,1748,1966,2082,4225, #  912
-3144,1234,1776,3284,2829,3695, 773,1206,2130,1066,2040,1326,3990,1738,1725,4226, #  928
- 279,3145,  51,1544,2604, 423,1578,2131,2067, 173,4542,1880,5083,5084,1583, 264, #  944
- 610,3696,4543,2444, 280, 154,5085,5086,5087,1739, 338,1282,3096, 693,2871,1411, #  960
-1074,3826,2445,5088,4544,5089,5090,1240, 952,2399,5091,2914,1538,2688, 685,1483, #  976
-4227,2475,1436, 953,4228,2055,4545, 671,2400,  79,4229,2446,3285, 608, 567,2689, #  992
-3469,4230,4231,1691, 393,1261,1792,2401,5092,4546,5093,5094,5095,5096,1383,1672, # 1008
-3827,3213,1464, 522,1119, 661,1150, 216, 675,4547,3991,1432,3574, 609,4548,2690, # 1024
-2402,5097,5098,5099,4232,3045,   0,5100,2476, 315, 231,2447, 301,3356,4549,2385, # 1040
-5101, 233,4233,3697,1819,4550,4551,5102,  96,1777,1315,2083,5103, 257,5104,1810, # 1056
-3698,2718,1139,1820,4234,2022,1124,2164,2791,1778,2659,5105,3097, 363,1655,3214, # 1072
-5106,2993,5107,5108,5109,3992,1567,3993, 718, 103,3215, 849,1443, 341,3357,2949, # 1088
-1484,5110,1712, 127,  67, 339,4235,2403, 679,1412, 821,5111,5112, 834, 738, 351, # 1104
-2994,2147, 846, 235,1497,1881, 418,1993,3828,2719, 186,1100,2148,2756,3575,1545, # 1120
-1355,2950,2872,1377, 583,3994,4236,2581,2995,5113,1298,3699,1078,2557,3700,2363, # 1136
-  78,3829,3830, 267,1289,2100,2002,1594,4237, 348, 369,1274,2197,2178,1838,4552, # 1152
-1821,2830,3701,2757,2288,2003,4553,2951,2758, 144,3358, 882,4554,3995,2759,3470, # 1168
-4555,2915,5114,4238,1726, 320,5115,3996,3046, 788,2996,5116,2831,1774,1327,2873, # 1184
-3997,2832,5117,1306,4556,2004,1700,3831,3576,2364,2660, 787,2023, 506, 824,3702, # 1200
- 534, 323,4557,1044,3359,2024,1901, 946,3471,5118,1779,1500,1678,5119,1882,4558, # 1216
- 165, 243,4559,3703,2528, 123, 683,4239, 764,4560,  36,3998,1793, 589,2916, 816, # 1232
- 626,1667,3047,2237,1639,1555,1622,3832,3999,5120,4000,2874,1370,1228,1933, 891, # 1248
-2084,2917, 304,4240,5121, 292,2997,2720,3577, 691,2101,4241,1115,4561, 118, 662, # 1264
-5122, 611,1156, 854,2386,1316,2875,   2, 386, 515,2918,5123,5124,3286, 868,2238, # 1280
-1486, 855,2661, 785,2216,3048,5125,1040,3216,3578,5126,3146, 448,5127,1525,5128, # 1296
-2165,4562,5129,3833,5130,4242,2833,3579,3147, 503, 818,4001,3148,1568, 814, 676, # 1312
-1444, 306,1749,5131,3834,1416,1030, 197,1428, 805,2834,1501,4563,5132,5133,5134, # 1328
-1994,5135,4564,5136,5137,2198,  13,2792,3704,2998,3149,1229,1917,5138,3835,2132, # 1344
-5139,4243,4565,2404,3580,5140,2217,1511,1727,1120,5141,5142, 646,3836,2448, 307, # 1360
-5143,5144,1595,3217,5145,5146,5147,3705,1113,1356,4002,1465,2529,2530,5148, 519, # 1376
-5149, 128,2133,  92,2289,1980,5150,4003,1512, 342,3150,2199,5151,2793,2218,1981, # 1392
-3360,4244, 290,1656,1317, 789, 827,2365,5152,3837,4566, 562, 581,4004,5153, 401, # 1408
-4567,2252,  94,4568,5154,1399,2794,5155,1463,2025,4569,3218,1944,5156, 828,1105, # 1424
-4245,1262,1394,5157,4246, 605,4570,5158,1784,2876,5159,2835, 819,2102, 578,2200, # 1440
-2952,5160,1502, 436,3287,4247,3288,2836,4005,2919,3472,3473,5161,2721,2320,5162, # 1456
-5163,2337,2068,  23,4571, 193, 826,3838,2103, 699,1630,4248,3098, 390,1794,1064, # 1472
-3581,5164,1579,3099,3100,1400,5165,4249,1839,1640,2877,5166,4572,4573, 137,4250, # 1488
- 598,3101,1967, 780, 104, 974,2953,5167, 278, 899, 253, 402, 572, 504, 493,1339, # 1504
-5168,4006,1275,4574,2582,2558,5169,3706,3049,3102,2253, 565,1334,2722, 863,  41, # 1520
-5170,5171,4575,5172,1657,2338,  19, 463,2760,4251, 606,5173,2999,3289,1087,2085, # 1536
-1323,2662,3000,5174,1631,1623,1750,4252,2691,5175,2878, 791,2723,2663,2339, 232, # 1552
-2421,5176,3001,1498,5177,2664,2630, 755,1366,3707,3290,3151,2026,1609, 119,1918, # 1568
-3474, 862,1026,4253,5178,4007,3839,4576,4008,4577,2265,1952,2477,5179,1125, 817, # 1584
-4254,4255,4009,1513,1766,2041,1487,4256,3050,3291,2837,3840,3152,5180,5181,1507, # 1600
-5182,2692, 733,  40,1632,1106,2879, 345,4257, 841,2531, 230,4578,3002,1847,3292, # 1616
-3475,5183,1263, 986,3476,5184, 735, 879, 254,1137, 857, 622,1300,1180,1388,1562, # 1632
-4010,4011,2954, 967,2761,2665,1349, 592,2134,1692,3361,3003,1995,4258,1679,4012, # 1648
-1902,2188,5185, 739,3708,2724,1296,1290,5186,4259,2201,2202,1922,1563,2605,2559, # 1664
-1871,2762,3004,5187, 435,5188, 343,1108, 596,  17,1751,4579,2239,3477,3709,5189, # 1680
-4580, 294,3582,2955,1693, 477, 979, 281,2042,3583, 643,2043,3710,2631,2795,2266, # 1696
-1031,2340,2135,2303,3584,4581, 367,1249,2560,5190,3585,5191,4582,1283,3362,2005, # 1712
- 240,1762,3363,4583,4584, 836,1069,3153, 474,5192,2149,2532, 268,3586,5193,3219, # 1728
-1521,1284,5194,1658,1546,4260,5195,3587,3588,5196,4261,3364,2693,1685,4262, 961, # 1744
-1673,2632, 190,2006,2203,3841,4585,4586,5197, 570,2504,3711,1490,5198,4587,2633, # 1760
-3293,1957,4588, 584,1514, 396,1045,1945,5199,4589,1968,2449,5200,5201,4590,4013, # 1776
- 619,5202,3154,3294, 215,2007,2796,2561,3220,4591,3221,4592, 763,4263,3842,4593, # 1792
-5203,5204,1958,1767,2956,3365,3712,1174, 452,1477,4594,3366,3155,5205,2838,1253, # 1808
-2387,2189,1091,2290,4264, 492,5206, 638,1169,1825,2136,1752,4014, 648, 926,1021, # 1824
-1324,4595, 520,4596, 997, 847,1007, 892,4597,3843,2267,1872,3713,2405,1785,4598, # 1840
-1953,2957,3103,3222,1728,4265,2044,3714,4599,2008,1701,3156,1551,  30,2268,4266, # 1856
-5207,2027,4600,3589,5208, 501,5209,4267, 594,3478,2166,1822,3590,3479,3591,3223, # 1872
- 829,2839,4268,5210,1680,3157,1225,4269,5211,3295,4601,4270,3158,2341,5212,4602, # 1888
-4271,5213,4015,4016,5214,1848,2388,2606,3367,5215,4603, 374,4017, 652,4272,4273, # 1904
- 375,1140, 798,5216,5217,5218,2366,4604,2269, 546,1659, 138,3051,2450,4605,5219, # 1920
-2254, 612,1849, 910, 796,3844,1740,1371, 825,3845,3846,5220,2920,2562,5221, 692, # 1936
- 444,3052,2634, 801,4606,4274,5222,1491, 244,1053,3053,4275,4276, 340,5223,4018, # 1952
-1041,3005, 293,1168,  87,1357,5224,1539, 959,5225,2240, 721, 694,4277,3847, 219, # 1968
-1478, 644,1417,3368,2666,1413,1401,1335,1389,4019,5226,5227,3006,2367,3159,1826, # 1984
- 730,1515, 184,2840,  66,4607,5228,1660,2958, 246,3369, 378,1457, 226,3480, 975, # 2000
-4020,2959,1264,3592, 674, 696,5229, 163,5230,1141,2422,2167, 713,3593,3370,4608, # 2016
-4021,5231,5232,1186,  15,5233,1079,1070,5234,1522,3224,3594, 276,1050,2725, 758, # 2032
-1126, 653,2960,3296,5235,2342, 889,3595,4022,3104,3007, 903,1250,4609,4023,3481, # 2048
-3596,1342,1681,1718, 766,3297, 286,  89,2961,3715,5236,1713,5237,2607,3371,3008, # 2064
-5238,2962,2219,3225,2880,5239,4610,2505,2533, 181, 387,1075,4024, 731,2190,3372, # 2080
-5240,3298, 310, 313,3482,2304, 770,4278,  54,3054, 189,4611,3105,3848,4025,5241, # 2096
-1230,1617,1850, 355,3597,4279,4612,3373, 111,4280,3716,1350,3160,3483,3055,4281, # 2112
-2150,3299,3598,5242,2797,4026,4027,3009, 722,2009,5243,1071, 247,1207,2343,2478, # 2128
-1378,4613,2010, 864,1437,1214,4614, 373,3849,1142,2220, 667,4615, 442,2763,2563, # 2144
-3850,4028,1969,4282,3300,1840, 837, 170,1107, 934,1336,1883,5244,5245,2119,4283, # 2160
-2841, 743,1569,5246,4616,4284, 582,2389,1418,3484,5247,1803,5248, 357,1395,1729, # 2176
-3717,3301,2423,1564,2241,5249,3106,3851,1633,4617,1114,2086,4285,1532,5250, 482, # 2192
-2451,4618,5251,5252,1492, 833,1466,5253,2726,3599,1641,2842,5254,1526,1272,3718, # 2208
-4286,1686,1795, 416,2564,1903,1954,1804,5255,3852,2798,3853,1159,2321,5256,2881, # 2224
-4619,1610,1584,3056,2424,2764, 443,3302,1163,3161,5257,5258,4029,5259,4287,2506, # 2240
-3057,4620,4030,3162,2104,1647,3600,2011,1873,4288,5260,4289, 431,3485,5261, 250, # 2256
-  97,  81,4290,5262,1648,1851,1558, 160, 848,5263, 866, 740,1694,5264,2204,2843, # 2272
-3226,4291,4621,3719,1687, 950,2479, 426, 469,3227,3720,3721,4031,5265,5266,1188, # 2288
- 424,1996, 861,3601,4292,3854,2205,2694, 168,1235,3602,4293,5267,2087,1674,4622, # 2304
-3374,3303, 220,2565,1009,5268,3855, 670,3010, 332,1208, 717,5269,5270,3603,2452, # 2320
-4032,3375,5271, 513,5272,1209,2882,3376,3163,4623,1080,5273,5274,5275,5276,2534, # 2336
-3722,3604, 815,1587,4033,4034,5277,3605,3486,3856,1254,4624,1328,3058,1390,4035, # 2352
-1741,4036,3857,4037,5278, 236,3858,2453,3304,5279,5280,3723,3859,1273,3860,4625, # 2368
-5281, 308,5282,4626, 245,4627,1852,2480,1307,2583, 430, 715,2137,2454,5283, 270, # 2384
- 199,2883,4038,5284,3606,2727,1753, 761,1754, 725,1661,1841,4628,3487,3724,5285, # 2400
-5286, 587,  14,3305, 227,2608, 326, 480,2270, 943,2765,3607, 291, 650,1884,5287, # 2416
-1702,1226, 102,1547,  62,3488, 904,4629,3489,1164,4294,5288,5289,1224,1548,2766, # 2432
- 391, 498,1493,5290,1386,1419,5291,2056,1177,4630, 813, 880,1081,2368, 566,1145, # 2448
-4631,2291,1001,1035,2566,2609,2242, 394,1286,5292,5293,2069,5294,  86,1494,1730, # 2464
-4039, 491,1588, 745, 897,2963, 843,3377,4040,2767,2884,3306,1768, 998,2221,2070, # 2480
- 397,1827,1195,1970,3725,3011,3378, 284,5295,3861,2507,2138,2120,1904,5296,4041, # 2496
-2151,4042,4295,1036,3490,1905, 114,2567,4296, 209,1527,5297,5298,2964,2844,2635, # 2512
-2390,2728,3164, 812,2568,5299,3307,5300,1559, 737,1885,3726,1210, 885,  28,2695, # 2528
-3608,3862,5301,4297,1004,1780,4632,5302, 346,1982,2222,2696,4633,3863,1742, 797, # 2544
-1642,4043,1934,1072,1384,2152, 896,4044,3308,3727,3228,2885,3609,5303,2569,1959, # 2560
-4634,2455,1786,5304,5305,5306,4045,4298,1005,1308,3728,4299,2729,4635,4636,1528, # 2576
-2610, 161,1178,4300,1983, 987,4637,1101,4301, 631,4046,1157,3229,2425,1343,1241, # 2592
-1016,2243,2570, 372, 877,2344,2508,1160, 555,1935, 911,4047,5307, 466,1170, 169, # 2608
-1051,2921,2697,3729,2481,3012,1182,2012,2571,1251,2636,5308, 992,2345,3491,1540, # 2624
-2730,1201,2071,2406,1997,2482,5309,4638, 528,1923,2191,1503,1874,1570,2369,3379, # 2640
-3309,5310, 557,1073,5311,1828,3492,2088,2271,3165,3059,3107, 767,3108,2799,4639, # 2656
-1006,4302,4640,2346,1267,2179,3730,3230, 778,4048,3231,2731,1597,2667,5312,4641, # 2672
-5313,3493,5314,5315,5316,3310,2698,1433,3311, 131,  95,1504,4049, 723,4303,3166, # 2688
-1842,3610,2768,2192,4050,2028,2105,3731,5317,3013,4051,1218,5318,3380,3232,4052, # 2704
-4304,2584, 248,1634,3864, 912,5319,2845,3732,3060,3865, 654,  53,5320,3014,5321, # 2720
-1688,4642, 777,3494,1032,4053,1425,5322, 191, 820,2121,2846, 971,4643, 931,3233, # 2736
- 135, 664, 783,3866,1998, 772,2922,1936,4054,3867,4644,2923,3234, 282,2732, 640, # 2752
-1372,3495,1127, 922, 325,3381,5323,5324, 711,2045,5325,5326,4055,2223,2800,1937, # 2768
-4056,3382,2224,2255,3868,2305,5327,4645,3869,1258,3312,4057,3235,2139,2965,4058, # 2784
-4059,5328,2225, 258,3236,4646, 101,1227,5329,3313,1755,5330,1391,3314,5331,2924, # 2800
-2057, 893,5332,5333,5334,1402,4305,2347,5335,5336,3237,3611,5337,5338, 878,1325, # 2816
-1781,2801,4647, 259,1385,2585, 744,1183,2272,4648,5339,4060,2509,5340, 684,1024, # 2832
-4306,5341, 472,3612,3496,1165,3315,4061,4062, 322,2153, 881, 455,1695,1152,1340, # 2848
- 660, 554,2154,4649,1058,4650,4307, 830,1065,3383,4063,4651,1924,5342,1703,1919, # 2864
-5343, 932,2273, 122,5344,4652, 947, 677,5345,3870,2637, 297,1906,1925,2274,4653, # 2880
-2322,3316,5346,5347,4308,5348,4309,  84,4310, 112, 989,5349, 547,1059,4064, 701, # 2896
-3613,1019,5350,4311,5351,3497, 942, 639, 457,2306,2456, 993,2966, 407, 851, 494, # 2912
-4654,3384, 927,5352,1237,5353,2426,3385, 573,4312, 680, 921,2925,1279,1875, 285, # 2928
- 790,1448,1984, 719,2168,5354,5355,4655,4065,4066,1649,5356,1541, 563,5357,1077, # 2944
-5358,3386,3061,3498, 511,3015,4067,4068,3733,4069,1268,2572,3387,3238,4656,4657, # 2960
-5359, 535,1048,1276,1189,2926,2029,3167,1438,1373,2847,2967,1134,2013,5360,4313, # 2976
-1238,2586,3109,1259,5361, 700,5362,2968,3168,3734,4314,5363,4315,1146,1876,1907, # 2992
-4658,2611,4070, 781,2427, 132,1589, 203, 147, 273,2802,2407, 898,1787,2155,4071, # 3008
-4072,5364,3871,2803,5365,5366,4659,4660,5367,3239,5368,1635,3872, 965,5369,1805, # 3024
-2699,1516,3614,1121,1082,1329,3317,4073,1449,3873,  65,1128,2848,2927,2769,1590, # 3040
-3874,5370,5371,  12,2668,  45, 976,2587,3169,4661, 517,2535,1013,1037,3240,5372, # 3056
-3875,2849,5373,3876,5374,3499,5375,2612, 614,1999,2323,3877,3110,2733,2638,5376, # 3072
-2588,4316, 599,1269,5377,1811,3735,5378,2700,3111, 759,1060, 489,1806,3388,3318, # 3088
-1358,5379,5380,2391,1387,1215,2639,2256, 490,5381,5382,4317,1759,2392,2348,5383, # 3104
-4662,3878,1908,4074,2640,1807,3241,4663,3500,3319,2770,2349, 874,5384,5385,3501, # 3120
-3736,1859,  91,2928,3737,3062,3879,4664,5386,3170,4075,2669,5387,3502,1202,1403, # 3136
-3880,2969,2536,1517,2510,4665,3503,2511,5388,4666,5389,2701,1886,1495,1731,4076, # 3152
-2370,4667,5390,2030,5391,5392,4077,2702,1216, 237,2589,4318,2324,4078,3881,4668, # 3168
-4669,2703,3615,3504, 445,4670,5393,5394,5395,5396,2771,  61,4079,3738,1823,4080, # 3184
-5397, 687,2046, 935, 925, 405,2670, 703,1096,1860,2734,4671,4081,1877,1367,2704, # 3200
-3389, 918,2106,1782,2483, 334,3320,1611,1093,4672, 564,3171,3505,3739,3390, 945, # 3216
-2641,2058,4673,5398,1926, 872,4319,5399,3506,2705,3112, 349,4320,3740,4082,4674, # 3232
-3882,4321,3741,2156,4083,4675,4676,4322,4677,2408,2047, 782,4084, 400, 251,4323, # 3248
-1624,5400,5401, 277,3742, 299,1265, 476,1191,3883,2122,4324,4325,1109, 205,5402, # 3264
-2590,1000,2157,3616,1861,5403,5404,5405,4678,5406,4679,2573, 107,2484,2158,4085, # 3280
-3507,3172,5407,1533, 541,1301, 158, 753,4326,2886,3617,5408,1696, 370,1088,4327, # 3296
-4680,3618, 579, 327, 440, 162,2244, 269,1938,1374,3508, 968,3063,  56,1396,3113, # 3312
-2107,3321,3391,5409,1927,2159,4681,3016,5410,3619,5411,5412,3743,4682,2485,5413, # 3328
-2804,5414,1650,4683,5415,2613,5416,5417,4086,2671,3392,1149,3393,4087,3884,4088, # 3344
-5418,1076,  49,5419, 951,3242,3322,3323, 450,2850, 920,5420,1812,2805,2371,4328, # 3360
-1909,1138,2372,3885,3509,5421,3243,4684,1910,1147,1518,2428,4685,3886,5422,4686, # 3376
-2393,2614, 260,1796,3244,5423,5424,3887,3324, 708,5425,3620,1704,5426,3621,1351, # 3392
-1618,3394,3017,1887, 944,4329,3395,4330,3064,3396,4331,5427,3744, 422, 413,1714, # 3408
-3325, 500,2059,2350,4332,2486,5428,1344,1911, 954,5429,1668,5430,5431,4089,2409, # 3424
-4333,3622,3888,4334,5432,2307,1318,2512,3114, 133,3115,2887,4687, 629,  31,2851, # 3440
-2706,3889,4688, 850, 949,4689,4090,2970,1732,2089,4335,1496,1853,5433,4091, 620, # 3456
-3245, 981,1242,3745,3397,1619,3746,1643,3326,2140,2457,1971,1719,3510,2169,5434, # 3472
-3246,5435,5436,3398,1829,5437,1277,4690,1565,2048,5438,1636,3623,3116,5439, 869, # 3488
-2852, 655,3890,3891,3117,4092,3018,3892,1310,3624,4691,5440,5441,5442,1733, 558, # 3504
-4692,3747, 335,1549,3065,1756,4336,3748,1946,3511,1830,1291,1192, 470,2735,2108, # 3520
-2806, 913,1054,4093,5443,1027,5444,3066,4094,4693, 982,2672,3399,3173,3512,3247, # 3536
-3248,1947,2807,5445, 571,4694,5446,1831,5447,3625,2591,1523,2429,5448,2090, 984, # 3552
-4695,3749,1960,5449,3750, 852, 923,2808,3513,3751, 969,1519, 999,2049,2325,1705, # 3568
-5450,3118, 615,1662, 151, 597,4095,2410,2326,1049, 275,4696,3752,4337, 568,3753, # 3584
-3626,2487,4338,3754,5451,2430,2275, 409,3249,5452,1566,2888,3514,1002, 769,2853, # 3600
- 194,2091,3174,3755,2226,3327,4339, 628,1505,5453,5454,1763,2180,3019,4096, 521, # 3616
-1161,2592,1788,2206,2411,4697,4097,1625,4340,4341, 412,  42,3119, 464,5455,2642, # 3632
-4698,3400,1760,1571,2889,3515,2537,1219,2207,3893,2643,2141,2373,4699,4700,3328, # 3648
-1651,3401,3627,5456,5457,3628,2488,3516,5458,3756,5459,5460,2276,2092, 460,5461, # 3664
-4701,5462,3020, 962, 588,3629, 289,3250,2644,1116,  52,5463,3067,1797,5464,5465, # 3680
-5466,1467,5467,1598,1143,3757,4342,1985,1734,1067,4702,1280,3402, 465,4703,1572, # 3696
- 510,5468,1928,2245,1813,1644,3630,5469,4704,3758,5470,5471,2673,1573,1534,5472, # 3712
-5473, 536,1808,1761,3517,3894,3175,2645,5474,5475,5476,4705,3518,2929,1912,2809, # 3728
-5477,3329,1122, 377,3251,5478, 360,5479,5480,4343,1529, 551,5481,2060,3759,1769, # 3744
-2431,5482,2930,4344,3330,3120,2327,2109,2031,4706,1404, 136,1468,1479, 672,1171, # 3760
-3252,2308, 271,3176,5483,2772,5484,2050, 678,2736, 865,1948,4707,5485,2014,4098, # 3776
-2971,5486,2737,2227,1397,3068,3760,4708,4709,1735,2931,3403,3631,5487,3895, 509, # 3792
-2854,2458,2890,3896,5488,5489,3177,3178,4710,4345,2538,4711,2309,1166,1010, 552, # 3808
- 681,1888,5490,5491,2972,2973,4099,1287,1596,1862,3179, 358, 453, 736, 175, 478, # 3824
-1117, 905,1167,1097,5492,1854,1530,5493,1706,5494,2181,3519,2292,3761,3520,3632, # 3840
-4346,2093,4347,5495,3404,1193,2489,4348,1458,2193,2208,1863,1889,1421,3331,2932, # 3856
-3069,2182,3521, 595,2123,5496,4100,5497,5498,4349,1707,2646, 223,3762,1359, 751, # 3872
-3121, 183,3522,5499,2810,3021, 419,2374, 633, 704,3897,2394, 241,5500,5501,5502, # 3888
- 838,3022,3763,2277,2773,2459,3898,1939,2051,4101,1309,3122,2246,1181,5503,1136, # 3904
-2209,3899,2375,1446,4350,2310,4712,5504,5505,4351,1055,2615, 484,3764,5506,4102, # 3920
- 625,4352,2278,3405,1499,4353,4103,5507,4104,4354,3253,2279,2280,3523,5508,5509, # 3936
-2774, 808,2616,3765,3406,4105,4355,3123,2539, 526,3407,3900,4356, 955,5510,1620, # 3952
-4357,2647,2432,5511,1429,3766,1669,1832, 994, 928,5512,3633,1260,5513,5514,5515, # 3968
-1949,2293, 741,2933,1626,4358,2738,2460, 867,1184, 362,3408,1392,5516,5517,4106, # 3984
-4359,1770,1736,3254,2934,4713,4714,1929,2707,1459,1158,5518,3070,3409,2891,1292, # 4000
-1930,2513,2855,3767,1986,1187,2072,2015,2617,4360,5519,2574,2514,2170,3768,2490, # 4016
-3332,5520,3769,4715,5521,5522, 666,1003,3023,1022,3634,4361,5523,4716,1814,2257, # 4032
- 574,3901,1603, 295,1535, 705,3902,4362, 283, 858, 417,5524,5525,3255,4717,4718, # 4048
-3071,1220,1890,1046,2281,2461,4107,1393,1599, 689,2575, 388,4363,5526,2491, 802, # 4064
-5527,2811,3903,2061,1405,2258,5528,4719,3904,2110,1052,1345,3256,1585,5529, 809, # 4080
-5530,5531,5532, 575,2739,3524, 956,1552,1469,1144,2328,5533,2329,1560,2462,3635, # 4096
-3257,4108, 616,2210,4364,3180,2183,2294,5534,1833,5535,3525,4720,5536,1319,3770, # 4112
-3771,1211,3636,1023,3258,1293,2812,5537,5538,5539,3905, 607,2311,3906, 762,2892, # 4128
-1439,4365,1360,4721,1485,3072,5540,4722,1038,4366,1450,2062,2648,4367,1379,4723, # 4144
-2593,5541,5542,4368,1352,1414,2330,2935,1172,5543,5544,3907,3908,4724,1798,1451, # 4160
-5545,5546,5547,5548,2936,4109,4110,2492,2351, 411,4111,4112,3637,3333,3124,4725, # 4176
-1561,2674,1452,4113,1375,5549,5550,  47,2974, 316,5551,1406,1591,2937,3181,5552, # 4192
-1025,2142,3125,3182, 354,2740, 884,2228,4369,2412, 508,3772, 726,3638, 996,2433, # 4208
-3639, 729,5553, 392,2194,1453,4114,4726,3773,5554,5555,2463,3640,2618,1675,2813, # 4224
- 919,2352,2975,2353,1270,4727,4115,  73,5556,5557, 647,5558,3259,2856,2259,1550, # 4240
-1346,3024,5559,1332, 883,3526,5560,5561,5562,5563,3334,2775,5564,1212, 831,1347, # 4256
-4370,4728,2331,3909,1864,3073, 720,3910,4729,4730,3911,5565,4371,5566,5567,4731, # 4272
-5568,5569,1799,4732,3774,2619,4733,3641,1645,2376,4734,5570,2938, 669,2211,2675, # 4288
-2434,5571,2893,5572,5573,1028,3260,5574,4372,2413,5575,2260,1353,5576,5577,4735, # 4304
-3183, 518,5578,4116,5579,4373,1961,5580,2143,4374,5581,5582,3025,2354,2355,3912, # 4320
- 516,1834,1454,4117,2708,4375,4736,2229,2620,1972,1129,3642,5583,2776,5584,2976, # 4336
-1422, 577,1470,3026,1524,3410,5585,5586, 432,4376,3074,3527,5587,2594,1455,2515, # 4352
-2230,1973,1175,5588,1020,2741,4118,3528,4737,5589,2742,5590,1743,1361,3075,3529, # 4368
-2649,4119,4377,4738,2295, 895, 924,4378,2171, 331,2247,3076, 166,1627,3077,1098, # 4384
-5591,1232,2894,2231,3411,4739, 657, 403,1196,2377, 542,3775,3412,1600,4379,3530, # 4400
-5592,4740,2777,3261, 576, 530,1362,4741,4742,2540,2676,3776,4120,5593, 842,3913, # 4416
-5594,2814,2032,1014,4121, 213,2709,3413, 665, 621,4380,5595,3777,2939,2435,5596, # 4432
-2436,3335,3643,3414,4743,4381,2541,4382,4744,3644,1682,4383,3531,1380,5597, 724, # 4448
-2282, 600,1670,5598,1337,1233,4745,3126,2248,5599,1621,4746,5600, 651,4384,5601, # 4464
-1612,4385,2621,5602,2857,5603,2743,2312,3078,5604, 716,2464,3079, 174,1255,2710, # 4480
-4122,3645, 548,1320,1398, 728,4123,1574,5605,1891,1197,3080,4124,5606,3081,3082, # 4496
-3778,3646,3779, 747,5607, 635,4386,4747,5608,5609,5610,4387,5611,5612,4748,5613, # 4512
-3415,4749,2437, 451,5614,3780,2542,2073,4388,2744,4389,4125,5615,1764,4750,5616, # 4528
-4390, 350,4751,2283,2395,2493,5617,4391,4126,2249,1434,4127, 488,4752, 458,4392, # 4544
-4128,3781, 771,1330,2396,3914,2576,3184,2160,2414,1553,2677,3185,4393,5618,2494, # 4560
-2895,2622,1720,2711,4394,3416,4753,5619,2543,4395,5620,3262,4396,2778,5621,2016, # 4576
-2745,5622,1155,1017,3782,3915,5623,3336,2313, 201,1865,4397,1430,5624,4129,5625, # 4592
-5626,5627,5628,5629,4398,1604,5630, 414,1866, 371,2595,4754,4755,3532,2017,3127, # 4608
-4756,1708, 960,4399, 887, 389,2172,1536,1663,1721,5631,2232,4130,2356,2940,1580, # 4624
-5632,5633,1744,4757,2544,4758,4759,5634,4760,5635,2074,5636,4761,3647,3417,2896, # 4640
-4400,5637,4401,2650,3418,2815, 673,2712,2465, 709,3533,4131,3648,4402,5638,1148, # 4656
- 502, 634,5639,5640,1204,4762,3649,1575,4763,2623,3783,5641,3784,3128, 948,3263, # 4672
- 121,1745,3916,1110,5642,4403,3083,2516,3027,4132,3785,1151,1771,3917,1488,4133, # 4688
-1987,5643,2438,3534,5644,5645,2094,5646,4404,3918,1213,1407,2816, 531,2746,2545, # 4704
-3264,1011,1537,4764,2779,4405,3129,1061,5647,3786,3787,1867,2897,5648,2018, 120, # 4720
-4406,4407,2063,3650,3265,2314,3919,2678,3419,1955,4765,4134,5649,3535,1047,2713, # 4736
-1266,5650,1368,4766,2858, 649,3420,3920,2546,2747,1102,2859,2679,5651,5652,2000, # 4752
-5653,1111,3651,2977,5654,2495,3921,3652,2817,1855,3421,3788,5655,5656,3422,2415, # 4768
-2898,3337,3266,3653,5657,2577,5658,3654,2818,4135,1460, 856,5659,3655,5660,2899, # 4784
-2978,5661,2900,3922,5662,4408, 632,2517, 875,3923,1697,3924,2296,5663,5664,4767, # 4800
-3028,1239, 580,4768,4409,5665, 914, 936,2075,1190,4136,1039,2124,5666,5667,5668, # 4816
-5669,3423,1473,5670,1354,4410,3925,4769,2173,3084,4137, 915,3338,4411,4412,3339, # 4832
-1605,1835,5671,2748, 398,3656,4413,3926,4138, 328,1913,2860,4139,3927,1331,4414, # 4848
-3029, 937,4415,5672,3657,4140,4141,3424,2161,4770,3425, 524, 742, 538,3085,1012, # 4864
-5673,5674,3928,2466,5675, 658,1103, 225,3929,5676,5677,4771,5678,4772,5679,3267, # 4880
-1243,5680,4142, 963,2250,4773,5681,2714,3658,3186,5682,5683,2596,2332,5684,4774, # 4896
-5685,5686,5687,3536, 957,3426,2547,2033,1931,2941,2467, 870,2019,3659,1746,2780, # 4912
-2781,2439,2468,5688,3930,5689,3789,3130,3790,3537,3427,3791,5690,1179,3086,5691, # 4928
-3187,2378,4416,3792,2548,3188,3131,2749,4143,5692,3428,1556,2549,2297, 977,2901, # 4944
-2034,4144,1205,3429,5693,1765,3430,3189,2125,1271, 714,1689,4775,3538,5694,2333, # 4960
-3931, 533,4417,3660,2184, 617,5695,2469,3340,3539,2315,5696,5697,3190,5698,5699, # 4976
-3932,1988, 618, 427,2651,3540,3431,5700,5701,1244,1690,5702,2819,4418,4776,5703, # 4992
-3541,4777,5704,2284,1576, 473,3661,4419,3432, 972,5705,3662,5706,3087,5707,5708, # 5008
-4778,4779,5709,3793,4145,4146,5710, 153,4780, 356,5711,1892,2902,4420,2144, 408, # 5024
- 803,2357,5712,3933,5713,4421,1646,2578,2518,4781,4782,3934,5714,3935,4422,5715, # 5040
-2416,3433, 752,5716,5717,1962,3341,2979,5718, 746,3030,2470,4783,4423,3794, 698, # 5056
-4784,1893,4424,3663,2550,4785,3664,3936,5719,3191,3434,5720,1824,1302,4147,2715, # 5072
-3937,1974,4425,5721,4426,3192, 823,1303,1288,1236,2861,3542,4148,3435, 774,3938, # 5088
-5722,1581,4786,1304,2862,3939,4787,5723,2440,2162,1083,3268,4427,4149,4428, 344, # 5104
-1173, 288,2316, 454,1683,5724,5725,1461,4788,4150,2597,5726,5727,4789, 985, 894, # 5120
-5728,3436,3193,5729,1914,2942,3795,1989,5730,2111,1975,5731,4151,5732,2579,1194, # 5136
- 425,5733,4790,3194,1245,3796,4429,5734,5735,2863,5736, 636,4791,1856,3940, 760, # 5152
-1800,5737,4430,2212,1508,4792,4152,1894,1684,2298,5738,5739,4793,4431,4432,2213, # 5168
- 479,5740,5741, 832,5742,4153,2496,5743,2980,2497,3797, 990,3132, 627,1815,2652, # 5184
-4433,1582,4434,2126,2112,3543,4794,5744, 799,4435,3195,5745,4795,2113,1737,3031, # 5200
-1018, 543, 754,4436,3342,1676,4796,4797,4154,4798,1489,5746,3544,5747,2624,2903, # 5216
-4155,5748,5749,2981,5750,5751,5752,5753,3196,4799,4800,2185,1722,5754,3269,3270, # 5232
-1843,3665,1715, 481, 365,1976,1857,5755,5756,1963,2498,4801,5757,2127,3666,3271, # 5248
- 433,1895,2064,2076,5758, 602,2750,5759,5760,5761,5762,5763,3032,1628,3437,5764, # 5264
-3197,4802,4156,2904,4803,2519,5765,2551,2782,5766,5767,5768,3343,4804,2905,5769, # 5280
-4805,5770,2864,4806,4807,1221,2982,4157,2520,5771,5772,5773,1868,1990,5774,5775, # 5296
-5776,1896,5777,5778,4808,1897,4158, 318,5779,2095,4159,4437,5780,5781, 485,5782, # 5312
- 938,3941, 553,2680, 116,5783,3942,3667,5784,3545,2681,2783,3438,3344,2820,5785, # 5328
-3668,2943,4160,1747,2944,2983,5786,5787, 207,5788,4809,5789,4810,2521,5790,3033, # 5344
- 890,3669,3943,5791,1878,3798,3439,5792,2186,2358,3440,1652,5793,5794,5795, 941, # 5360
-2299, 208,3546,4161,2020, 330,4438,3944,2906,2499,3799,4439,4811,5796,5797,5798, # 5376
-)
-
diff --git a/venv/lib/python3.7/site-packages/chardet/big5prober.py b/venv/lib/python3.7/site-packages/chardet/big5prober.py
deleted file mode 100644
index 98f9970..0000000
--- a/venv/lib/python3.7/site-packages/chardet/big5prober.py
+++ /dev/null
@@ -1,47 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .mbcharsetprober import MultiByteCharSetProber
-from .codingstatemachine import CodingStateMachine
-from .chardistribution import Big5DistributionAnalysis
-from .mbcssm import BIG5_SM_MODEL
-
-
-class Big5Prober(MultiByteCharSetProber):
-    def __init__(self):
-        super(Big5Prober, self).__init__()
-        self.coding_sm = CodingStateMachine(BIG5_SM_MODEL)
-        self.distribution_analyzer = Big5DistributionAnalysis()
-        self.reset()
-
-    @property
-    def charset_name(self):
-        return "Big5"
-
-    @property
-    def language(self):
-        return "Chinese"
diff --git a/venv/lib/python3.7/site-packages/chardet/chardistribution.py b/venv/lib/python3.7/site-packages/chardet/chardistribution.py
deleted file mode 100644
index c0395f4..0000000
--- a/venv/lib/python3.7/site-packages/chardet/chardistribution.py
+++ /dev/null
@@ -1,233 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .euctwfreq import (EUCTW_CHAR_TO_FREQ_ORDER, EUCTW_TABLE_SIZE,
-                        EUCTW_TYPICAL_DISTRIBUTION_RATIO)
-from .euckrfreq import (EUCKR_CHAR_TO_FREQ_ORDER, EUCKR_TABLE_SIZE,
-                        EUCKR_TYPICAL_DISTRIBUTION_RATIO)
-from .gb2312freq import (GB2312_CHAR_TO_FREQ_ORDER, GB2312_TABLE_SIZE,
-                         GB2312_TYPICAL_DISTRIBUTION_RATIO)
-from .big5freq import (BIG5_CHAR_TO_FREQ_ORDER, BIG5_TABLE_SIZE,
-                       BIG5_TYPICAL_DISTRIBUTION_RATIO)
-from .jisfreq import (JIS_CHAR_TO_FREQ_ORDER, JIS_TABLE_SIZE,
-                      JIS_TYPICAL_DISTRIBUTION_RATIO)
-
-
-class CharDistributionAnalysis(object):
-    ENOUGH_DATA_THRESHOLD = 1024
-    SURE_YES = 0.99
-    SURE_NO = 0.01
-    MINIMUM_DATA_THRESHOLD = 3
-
-    def __init__(self):
-        # Mapping table to get frequency order from char order (get from
-        # GetOrder())
-        self._char_to_freq_order = None
-        self._table_size = None  # Size of above table
-        # This is a constant value which varies from language to language,
-        # used in calculating confidence.  See
-        # http://www.mozilla.org/projects/intl/UniversalCharsetDetection.html
-        # for further detail.
-        self.typical_distribution_ratio = None
-        self._done = None
-        self._total_chars = None
-        self._freq_chars = None
-        self.reset()
-
-    def reset(self):
-        """reset analyser, clear any state"""
-        # If this flag is set to True, detection is done and conclusion has
-        # been made
-        self._done = False
-        self._total_chars = 0  # Total characters encountered
-        # The number of characters whose frequency order is less than 512
-        self._freq_chars = 0
-
-    def feed(self, char, char_len):
-        """feed a character with known length"""
-        if char_len == 2:
-            # we only care about 2-bytes character in our distribution analysis
-            order = self.get_order(char)
-        else:
-            order = -1
-        if order >= 0:
-            self._total_chars += 1
-            # order is valid
-            if order < self._table_size:
-                if 512 > self._char_to_freq_order[order]:
-                    self._freq_chars += 1
-
-    def get_confidence(self):
-        """return confidence based on existing data"""
-        # if we didn't receive any character in our consideration range,
-        # return negative answer
-        if self._total_chars <= 0 or self._freq_chars <= self.MINIMUM_DATA_THRESHOLD:
-            return self.SURE_NO
-
-        if self._total_chars != self._freq_chars:
-            r = (self._freq_chars / ((self._total_chars - self._freq_chars)
-                 * self.typical_distribution_ratio))
-            if r < self.SURE_YES:
-                return r
-
-        # normalize confidence (we don't want to be 100% sure)
-        return self.SURE_YES
-
-    def got_enough_data(self):
-        # It is not necessary to receive all data to draw conclusion.
-        # For charset detection, certain amount of data is enough
-        return self._total_chars > self.ENOUGH_DATA_THRESHOLD
-
-    def get_order(self, byte_str):
-        # We do not handle characters based on the original encoding string,
-        # but convert this encoding string to a number, here called order.
-        # This allows multiple encodings of a language to share one frequency
-        # table.
-        return -1
-
-
-class EUCTWDistributionAnalysis(CharDistributionAnalysis):
-    def __init__(self):
-        super(EUCTWDistributionAnalysis, self).__init__()
-        self._char_to_freq_order = EUCTW_CHAR_TO_FREQ_ORDER
-        self._table_size = EUCTW_TABLE_SIZE
-        self.typical_distribution_ratio = EUCTW_TYPICAL_DISTRIBUTION_RATIO
-
-    def get_order(self, byte_str):
-        # for euc-TW encoding, we are interested
-        #   first  byte range: 0xc4 -- 0xfe
-        #   second byte range: 0xa1 -- 0xfe
-        # no validation needed here. State machine has done that
-        first_char = byte_str[0]
-        if first_char >= 0xC4:
-            return 94 * (first_char - 0xC4) + byte_str[1] - 0xA1
-        else:
-            return -1
-
-
-class EUCKRDistributionAnalysis(CharDistributionAnalysis):
-    def __init__(self):
-        super(EUCKRDistributionAnalysis, self).__init__()
-        self._char_to_freq_order = EUCKR_CHAR_TO_FREQ_ORDER
-        self._table_size = EUCKR_TABLE_SIZE
-        self.typical_distribution_ratio = EUCKR_TYPICAL_DISTRIBUTION_RATIO
-
-    def get_order(self, byte_str):
-        # for euc-KR encoding, we are interested
-        #   first  byte range: 0xb0 -- 0xfe
-        #   second byte range: 0xa1 -- 0xfe
-        # no validation needed here. State machine has done that
-        first_char = byte_str[0]
-        if first_char >= 0xB0:
-            return 94 * (first_char - 0xB0) + byte_str[1] - 0xA1
-        else:
-            return -1
-
-
-class GB2312DistributionAnalysis(CharDistributionAnalysis):
-    def __init__(self):
-        super(GB2312DistributionAnalysis, self).__init__()
-        self._char_to_freq_order = GB2312_CHAR_TO_FREQ_ORDER
-        self._table_size = GB2312_TABLE_SIZE
-        self.typical_distribution_ratio = GB2312_TYPICAL_DISTRIBUTION_RATIO
-
-    def get_order(self, byte_str):
-        # for GB2312 encoding, we are interested
-        #  first  byte range: 0xb0 -- 0xfe
-        #  second byte range: 0xa1 -- 0xfe
-        # no validation needed here. State machine has done that
-        first_char, second_char = byte_str[0], byte_str[1]
-        if (first_char >= 0xB0) and (second_char >= 0xA1):
-            return 94 * (first_char - 0xB0) + second_char - 0xA1
-        else:
-            return -1
-
-
-class Big5DistributionAnalysis(CharDistributionAnalysis):
-    def __init__(self):
-        super(Big5DistributionAnalysis, self).__init__()
-        self._char_to_freq_order = BIG5_CHAR_TO_FREQ_ORDER
-        self._table_size = BIG5_TABLE_SIZE
-        self.typical_distribution_ratio = BIG5_TYPICAL_DISTRIBUTION_RATIO
-
-    def get_order(self, byte_str):
-        # for big5 encoding, we are interested
-        #   first  byte range: 0xa4 -- 0xfe
-        #   second byte range: 0x40 -- 0x7e , 0xa1 -- 0xfe
-        # no validation needed here. State machine has done that
-        first_char, second_char = byte_str[0], byte_str[1]
-        if first_char >= 0xA4:
-            if second_char >= 0xA1:
-                return 157 * (first_char - 0xA4) + second_char - 0xA1 + 63
-            else:
-                return 157 * (first_char - 0xA4) + second_char - 0x40
-        else:
-            return -1
-
-
-class SJISDistributionAnalysis(CharDistributionAnalysis):
-    def __init__(self):
-        super(SJISDistributionAnalysis, self).__init__()
-        self._char_to_freq_order = JIS_CHAR_TO_FREQ_ORDER
-        self._table_size = JIS_TABLE_SIZE
-        self.typical_distribution_ratio = JIS_TYPICAL_DISTRIBUTION_RATIO
-
-    def get_order(self, byte_str):
-        # for sjis encoding, we are interested
-        #   first  byte range: 0x81 -- 0x9f , 0xe0 -- 0xfe
-        #   second byte range: 0x40 -- 0x7e,  0x81 -- oxfe
-        # no validation needed here. State machine has done that
-        first_char, second_char = byte_str[0], byte_str[1]
-        if (first_char >= 0x81) and (first_char <= 0x9F):
-            order = 188 * (first_char - 0x81)
-        elif (first_char >= 0xE0) and (first_char <= 0xEF):
-            order = 188 * (first_char - 0xE0 + 31)
-        else:
-            return -1
-        order = order + second_char - 0x40
-        if second_char > 0x7F:
-            order = -1
-        return order
-
-
-class EUCJPDistributionAnalysis(CharDistributionAnalysis):
-    def __init__(self):
-        super(EUCJPDistributionAnalysis, self).__init__()
-        self._char_to_freq_order = JIS_CHAR_TO_FREQ_ORDER
-        self._table_size = JIS_TABLE_SIZE
-        self.typical_distribution_ratio = JIS_TYPICAL_DISTRIBUTION_RATIO
-
-    def get_order(self, byte_str):
-        # for euc-JP encoding, we are interested
-        #   first  byte range: 0xa0 -- 0xfe
-        #   second byte range: 0xa1 -- 0xfe
-        # no validation needed here. State machine has done that
-        char = byte_str[0]
-        if char >= 0xA0:
-            return 94 * (char - 0xA1) + byte_str[1] - 0xa1
-        else:
-            return -1
diff --git a/venv/lib/python3.7/site-packages/chardet/charsetgroupprober.py b/venv/lib/python3.7/site-packages/chardet/charsetgroupprober.py
deleted file mode 100644
index 8b3738e..0000000
--- a/venv/lib/python3.7/site-packages/chardet/charsetgroupprober.py
+++ /dev/null
@@ -1,106 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .enums import ProbingState
-from .charsetprober import CharSetProber
-
-
-class CharSetGroupProber(CharSetProber):
-    def __init__(self, lang_filter=None):
-        super(CharSetGroupProber, self).__init__(lang_filter=lang_filter)
-        self._active_num = 0
-        self.probers = []
-        self._best_guess_prober = None
-
-    def reset(self):
-        super(CharSetGroupProber, self).reset()
-        self._active_num = 0
-        for prober in self.probers:
-            if prober:
-                prober.reset()
-                prober.active = True
-                self._active_num += 1
-        self._best_guess_prober = None
-
-    @property
-    def charset_name(self):
-        if not self._best_guess_prober:
-            self.get_confidence()
-            if not self._best_guess_prober:
-                return None
-        return self._best_guess_prober.charset_name
-
-    @property
-    def language(self):
-        if not self._best_guess_prober:
-            self.get_confidence()
-            if not self._best_guess_prober:
-                return None
-        return self._best_guess_prober.language
-
-    def feed(self, byte_str):
-        for prober in self.probers:
-            if not prober:
-                continue
-            if not prober.active:
-                continue
-            state = prober.feed(byte_str)
-            if not state:
-                continue
-            if state == ProbingState.FOUND_IT:
-                self._best_guess_prober = prober
-                return self.state
-            elif state == ProbingState.NOT_ME:
-                prober.active = False
-                self._active_num -= 1
-                if self._active_num <= 0:
-                    self._state = ProbingState.NOT_ME
-                    return self.state
-        return self.state
-
-    def get_confidence(self):
-        state = self.state
-        if state == ProbingState.FOUND_IT:
-            return 0.99
-        elif state == ProbingState.NOT_ME:
-            return 0.01
-        best_conf = 0.0
-        self._best_guess_prober = None
-        for prober in self.probers:
-            if not prober:
-                continue
-            if not prober.active:
-                self.logger.debug('%s not active', prober.charset_name)
-                continue
-            conf = prober.get_confidence()
-            self.logger.debug('%s %s confidence = %s', prober.charset_name, prober.language, conf)
-            if best_conf < conf:
-                best_conf = conf
-                self._best_guess_prober = prober
-        if not self._best_guess_prober:
-            return 0.0
-        return best_conf
diff --git a/venv/lib/python3.7/site-packages/chardet/charsetprober.py b/venv/lib/python3.7/site-packages/chardet/charsetprober.py
deleted file mode 100644
index eac4e59..0000000
--- a/venv/lib/python3.7/site-packages/chardet/charsetprober.py
+++ /dev/null
@@ -1,145 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Universal charset detector code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 2001
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#   Shy Shalom - original C code
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-import logging
-import re
-
-from .enums import ProbingState
-
-
-class CharSetProber(object):
-
-    SHORTCUT_THRESHOLD = 0.95
-
-    def __init__(self, lang_filter=None):
-        self._state = None
-        self.lang_filter = lang_filter
-        self.logger = logging.getLogger(__name__)
-
-    def reset(self):
-        self._state = ProbingState.DETECTING
-
-    @property
-    def charset_name(self):
-        return None
-
-    def feed(self, buf):
-        pass
-
-    @property
-    def state(self):
-        return self._state
-
-    def get_confidence(self):
-        return 0.0
-
-    @staticmethod
-    def filter_high_byte_only(buf):
-        buf = re.sub(b'([\x00-\x7F])+', b' ', buf)
-        return buf
-
-    @staticmethod
-    def filter_international_words(buf):
-        """
-        We define three types of bytes:
-        alphabet: english alphabets [a-zA-Z]
-        international: international characters [\x80-\xFF]
-        marker: everything else [^a-zA-Z\x80-\xFF]
-
-        The input buffer can be thought to contain a series of words delimited
-        by markers. This function works to filter all words that contain at
-        least one international character. All contiguous sequences of markers
-        are replaced by a single space ascii character.
-
-        This filter applies to all scripts which do not use English characters.
-        """
-        filtered = bytearray()
-
-        # This regex expression filters out only words that have at-least one
-        # international character. The word may include one marker character at
-        # the end.
-        words = re.findall(b'[a-zA-Z]*[\x80-\xFF]+[a-zA-Z]*[^a-zA-Z\x80-\xFF]?',
-                           buf)
-
-        for word in words:
-            filtered.extend(word[:-1])
-
-            # If the last character in the word is a marker, replace it with a
-            # space as markers shouldn't affect our analysis (they are used
-            # similarly across all languages and may thus have similar
-            # frequencies).
-            last_char = word[-1:]
-            if not last_char.isalpha() and last_char < b'\x80':
-                last_char = b' '
-            filtered.extend(last_char)
-
-        return filtered
-
-    @staticmethod
-    def filter_with_english_letters(buf):
-        """
-        Returns a copy of ``buf`` that retains only the sequences of English
-        alphabet and high byte characters that are not between <> characters.
-        Also retains English alphabet and high byte characters immediately
-        before occurrences of >.
-
-        This filter can be applied to all scripts which contain both English
-        characters and extended ASCII characters, but is currently only used by
-        ``Latin1Prober``.
-        """
-        filtered = bytearray()
-        in_tag = False
-        prev = 0
-
-        for curr in range(len(buf)):
-            # Slice here to get bytes instead of an int with Python 3
-            buf_char = buf[curr:curr + 1]
-            # Check if we're coming out of or entering an HTML tag
-            if buf_char == b'>':
-                in_tag = False
-            elif buf_char == b'<':
-                in_tag = True
-
-            # If current character is not extended-ASCII and not alphabetic...
-            if buf_char < b'\x80' and not buf_char.isalpha():
-                # ...and we're not in a tag
-                if curr > prev and not in_tag:
-                    # Keep everything after last non-extended-ASCII,
-                    # non-alphabetic character
-                    filtered.extend(buf[prev:curr])
-                    # Output a space to delimit stretch we kept
-                    filtered.extend(b' ')
-                prev = curr + 1
-
-        # If we're not in a tag...
-        if not in_tag:
-            # Keep everything after last non-extended-ASCII, non-alphabetic
-            # character
-            filtered.extend(buf[prev:])
-
-        return filtered
diff --git a/venv/lib/python3.7/site-packages/chardet/cli/__init__.py b/venv/lib/python3.7/site-packages/chardet/cli/__init__.py
deleted file mode 100644
index 8b13789..0000000
--- a/venv/lib/python3.7/site-packages/chardet/cli/__init__.py
+++ /dev/null
@@ -1 +0,0 @@
-
diff --git a/venv/lib/python3.7/site-packages/chardet/cli/chardetect.py b/venv/lib/python3.7/site-packages/chardet/cli/chardetect.py
deleted file mode 100644
index f0a4cc5..0000000
--- a/venv/lib/python3.7/site-packages/chardet/cli/chardetect.py
+++ /dev/null
@@ -1,85 +0,0 @@
-#!/usr/bin/env python
-"""
-Script which takes one or more file paths and reports on their detected
-encodings
-
-Example::
-
-    % chardetect somefile someotherfile
-    somefile: windows-1252 with confidence 0.5
-    someotherfile: ascii with confidence 1.0
-
-If no paths are provided, it takes its input from stdin.
-
-"""
-
-from __future__ import absolute_import, print_function, unicode_literals
-
-import argparse
-import sys
-
-from chardet import __version__
-from chardet.compat import PY2
-from chardet.universaldetector import UniversalDetector
-
-
-def description_of(lines, name='stdin'):
-    """
-    Return a string describing the probable encoding of a file or
-    list of strings.
-
-    :param lines: The lines to get the encoding of.
-    :type lines: Iterable of bytes
-    :param name: Name of file or collection of lines
-    :type name: str
-    """
-    u = UniversalDetector()
-    for line in lines:
-        line = bytearray(line)
-        u.feed(line)
-        # shortcut out of the loop to save reading further - particularly useful if we read a BOM.
-        if u.done:
-            break
-    u.close()
-    result = u.result
-    if PY2:
-        name = name.decode(sys.getfilesystemencoding(), 'ignore')
-    if result['encoding']:
-        return '{0}: {1} with confidence {2}'.format(name, result['encoding'],
-                                                     result['confidence'])
-    else:
-        return '{0}: no result'.format(name)
-
-
-def main(argv=None):
-    """
-    Handles command line arguments and gets things started.
-
-    :param argv: List of arguments, as if specified on the command-line.
-                 If None, ``sys.argv[1:]`` is used instead.
-    :type argv: list of str
-    """
-    # Get command line arguments
-    parser = argparse.ArgumentParser(
-        description="Takes one or more file paths and reports their detected \
-                     encodings")
-    parser.add_argument('input',
-                        help='File whose encoding we would like to determine. \
-                              (default: stdin)',
-                        type=argparse.FileType('rb'), nargs='*',
-                        default=[sys.stdin if PY2 else sys.stdin.buffer])
-    parser.add_argument('--version', action='version',
-                        version='%(prog)s {0}'.format(__version__))
-    args = parser.parse_args(argv)
-
-    for f in args.input:
-        if f.isatty():
-            print("You are running chardetect interactively. Press " +
-                  "CTRL-D twice at the start of a blank line to signal the " +
-                  "end of your input. If you want help, run chardetect " +
-                  "--help\n", file=sys.stderr)
-        print(description_of(f, f.name))
-
-
-if __name__ == '__main__':
-    main()
diff --git a/venv/lib/python3.7/site-packages/chardet/codingstatemachine.py b/venv/lib/python3.7/site-packages/chardet/codingstatemachine.py
deleted file mode 100644
index 68fba44..0000000
--- a/venv/lib/python3.7/site-packages/chardet/codingstatemachine.py
+++ /dev/null
@@ -1,88 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is mozilla.org code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-import logging
-
-from .enums import MachineState
-
-
-class CodingStateMachine(object):
-    """
-    A state machine to verify a byte sequence for a particular encoding. For
-    each byte the detector receives, it will feed that byte to every active
-    state machine available, one byte at a time. The state machine changes its
-    state based on its previous state and the byte it receives. There are 3
-    states in a state machine that are of interest to an auto-detector:
-
-    START state: This is the state to start with, or a legal byte sequence
-                 (i.e. a valid code point) for character has been identified.
-
-    ME state:  This indicates that the state machine identified a byte sequence
-               that is specific to the charset it is designed for and that
-               there is no other possible encoding which can contain this byte
-               sequence. This will to lead to an immediate positive answer for
-               the detector.
-
-    ERROR state: This indicates the state machine identified an illegal byte
-                 sequence for that encoding. This will lead to an immediate
-                 negative answer for this encoding. Detector will exclude this
-                 encoding from consideration from here on.
-    """
-    def __init__(self, sm):
-        self._model = sm
-        self._curr_byte_pos = 0
-        self._curr_char_len = 0
-        self._curr_state = None
-        self.logger = logging.getLogger(__name__)
-        self.reset()
-
-    def reset(self):
-        self._curr_state = MachineState.START
-
-    def next_state(self, c):
-        # for each byte we get its class
-        # if it is first byte, we also get byte length
-        byte_class = self._model['class_table'][c]
-        if self._curr_state == MachineState.START:
-            self._curr_byte_pos = 0
-            self._curr_char_len = self._model['char_len_table'][byte_class]
-        # from byte's class and state_table, we get its next state
-        curr_state = (self._curr_state * self._model['class_factor']
-                      + byte_class)
-        self._curr_state = self._model['state_table'][curr_state]
-        self._curr_byte_pos += 1
-        return self._curr_state
-
-    def get_current_charlen(self):
-        return self._curr_char_len
-
-    def get_coding_state_machine(self):
-        return self._model['name']
-
-    @property
-    def language(self):
-        return self._model['language']
diff --git a/venv/lib/python3.7/site-packages/chardet/compat.py b/venv/lib/python3.7/site-packages/chardet/compat.py
deleted file mode 100644
index ddd7468..0000000
--- a/venv/lib/python3.7/site-packages/chardet/compat.py
+++ /dev/null
@@ -1,34 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# Contributor(s):
-#   Dan Blanchard
-#   Ian Cordasco
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-import sys
-
-
-if sys.version_info < (3, 0):
-    PY2 = True
-    PY3 = False
-    base_str = (str, unicode)
-    text_type = unicode
-else:
-    PY2 = False
-    PY3 = True
-    base_str = (bytes, str)
-    text_type = str
diff --git a/venv/lib/python3.7/site-packages/chardet/cp949prober.py b/venv/lib/python3.7/site-packages/chardet/cp949prober.py
deleted file mode 100644
index efd793a..0000000
--- a/venv/lib/python3.7/site-packages/chardet/cp949prober.py
+++ /dev/null
@@ -1,49 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is mozilla.org code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .chardistribution import EUCKRDistributionAnalysis
-from .codingstatemachine import CodingStateMachine
-from .mbcharsetprober import MultiByteCharSetProber
-from .mbcssm import CP949_SM_MODEL
-
-
-class CP949Prober(MultiByteCharSetProber):
-    def __init__(self):
-        super(CP949Prober, self).__init__()
-        self.coding_sm = CodingStateMachine(CP949_SM_MODEL)
-        # NOTE: CP949 is a superset of EUC-KR, so the distribution should be
-        #       not different.
-        self.distribution_analyzer = EUCKRDistributionAnalysis()
-        self.reset()
-
-    @property
-    def charset_name(self):
-        return "CP949"
-
-    @property
-    def language(self):
-        return "Korean"
diff --git a/venv/lib/python3.7/site-packages/chardet/enums.py b/venv/lib/python3.7/site-packages/chardet/enums.py
deleted file mode 100644
index 0451207..0000000
--- a/venv/lib/python3.7/site-packages/chardet/enums.py
+++ /dev/null
@@ -1,76 +0,0 @@
-"""
-All of the Enums that are used throughout the chardet package.
-
-:author: Dan Blanchard (dan.blanchard@gmail.com)
-"""
-
-
-class InputState(object):
-    """
-    This enum represents the different states a universal detector can be in.
-    """
-    PURE_ASCII = 0
-    ESC_ASCII = 1
-    HIGH_BYTE = 2
-
-
-class LanguageFilter(object):
-    """
-    This enum represents the different language filters we can apply to a
-    ``UniversalDetector``.
-    """
-    CHINESE_SIMPLIFIED = 0x01
-    CHINESE_TRADITIONAL = 0x02
-    JAPANESE = 0x04
-    KOREAN = 0x08
-    NON_CJK = 0x10
-    ALL = 0x1F
-    CHINESE = CHINESE_SIMPLIFIED | CHINESE_TRADITIONAL
-    CJK = CHINESE | JAPANESE | KOREAN
-
-
-class ProbingState(object):
-    """
-    This enum represents the different states a prober can be in.
-    """
-    DETECTING = 0
-    FOUND_IT = 1
-    NOT_ME = 2
-
-
-class MachineState(object):
-    """
-    This enum represents the different states a state machine can be in.
-    """
-    START = 0
-    ERROR = 1
-    ITS_ME = 2
-
-
-class SequenceLikelihood(object):
-    """
-    This enum represents the likelihood of a character following the previous one.
-    """
-    NEGATIVE = 0
-    UNLIKELY = 1
-    LIKELY = 2
-    POSITIVE = 3
-
-    @classmethod
-    def get_num_categories(cls):
-        """:returns: The number of likelihood categories in the enum."""
-        return 4
-
-
-class CharacterCategory(object):
-    """
-    This enum represents the different categories language models for
-    ``SingleByteCharsetProber`` put characters into.
-
-    Anything less than CONTROL is considered a letter.
-    """
-    UNDEFINED = 255
-    LINE_BREAK = 254
-    SYMBOL = 253
-    DIGIT = 252
-    CONTROL = 251
diff --git a/venv/lib/python3.7/site-packages/chardet/escprober.py b/venv/lib/python3.7/site-packages/chardet/escprober.py
deleted file mode 100644
index c70493f..0000000
--- a/venv/lib/python3.7/site-packages/chardet/escprober.py
+++ /dev/null
@@ -1,101 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is mozilla.org code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .charsetprober import CharSetProber
-from .codingstatemachine import CodingStateMachine
-from .enums import LanguageFilter, ProbingState, MachineState
-from .escsm import (HZ_SM_MODEL, ISO2022CN_SM_MODEL, ISO2022JP_SM_MODEL,
-                    ISO2022KR_SM_MODEL)
-
-
-class EscCharSetProber(CharSetProber):
-    """
-    This CharSetProber uses a "code scheme" approach for detecting encodings,
-    whereby easily recognizable escape or shift sequences are relied on to
-    identify these encodings.
-    """
-
-    def __init__(self, lang_filter=None):
-        super(EscCharSetProber, self).__init__(lang_filter=lang_filter)
-        self.coding_sm = []
-        if self.lang_filter & LanguageFilter.CHINESE_SIMPLIFIED:
-            self.coding_sm.append(CodingStateMachine(HZ_SM_MODEL))
-            self.coding_sm.append(CodingStateMachine(ISO2022CN_SM_MODEL))
-        if self.lang_filter & LanguageFilter.JAPANESE:
-            self.coding_sm.append(CodingStateMachine(ISO2022JP_SM_MODEL))
-        if self.lang_filter & LanguageFilter.KOREAN:
-            self.coding_sm.append(CodingStateMachine(ISO2022KR_SM_MODEL))
-        self.active_sm_count = None
-        self._detected_charset = None
-        self._detected_language = None
-        self._state = None
-        self.reset()
-
-    def reset(self):
-        super(EscCharSetProber, self).reset()
-        for coding_sm in self.coding_sm:
-            if not coding_sm:
-                continue
-            coding_sm.active = True
-            coding_sm.reset()
-        self.active_sm_count = len(self.coding_sm)
-        self._detected_charset = None
-        self._detected_language = None
-
-    @property
-    def charset_name(self):
-        return self._detected_charset
-
-    @property
-    def language(self):
-        return self._detected_language
-
-    def get_confidence(self):
-        if self._detected_charset:
-            return 0.99
-        else:
-            return 0.00
-
-    def feed(self, byte_str):
-        for c in byte_str:
-            for coding_sm in self.coding_sm:
-                if not coding_sm or not coding_sm.active:
-                    continue
-                coding_state = coding_sm.next_state(c)
-                if coding_state == MachineState.ERROR:
-                    coding_sm.active = False
-                    self.active_sm_count -= 1
-                    if self.active_sm_count <= 0:
-                        self._state = ProbingState.NOT_ME
-                        return self.state
-                elif coding_state == MachineState.ITS_ME:
-                    self._state = ProbingState.FOUND_IT
-                    self._detected_charset = coding_sm.get_coding_state_machine()
-                    self._detected_language = coding_sm.language
-                    return self.state
-
-        return self.state
diff --git a/venv/lib/python3.7/site-packages/chardet/escsm.py b/venv/lib/python3.7/site-packages/chardet/escsm.py
deleted file mode 100644
index 0069523..0000000
--- a/venv/lib/python3.7/site-packages/chardet/escsm.py
+++ /dev/null
@@ -1,246 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is mozilla.org code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .enums import MachineState
-
-HZ_CLS = (
-1,0,0,0,0,0,0,0,  # 00 - 07
-0,0,0,0,0,0,0,0,  # 08 - 0f
-0,0,0,0,0,0,0,0,  # 10 - 17
-0,0,0,1,0,0,0,0,  # 18 - 1f
-0,0,0,0,0,0,0,0,  # 20 - 27
-0,0,0,0,0,0,0,0,  # 28 - 2f
-0,0,0,0,0,0,0,0,  # 30 - 37
-0,0,0,0,0,0,0,0,  # 38 - 3f
-0,0,0,0,0,0,0,0,  # 40 - 47
-0,0,0,0,0,0,0,0,  # 48 - 4f
-0,0,0,0,0,0,0,0,  # 50 - 57
-0,0,0,0,0,0,0,0,  # 58 - 5f
-0,0,0,0,0,0,0,0,  # 60 - 67
-0,0,0,0,0,0,0,0,  # 68 - 6f
-0,0,0,0,0,0,0,0,  # 70 - 77
-0,0,0,4,0,5,2,0,  # 78 - 7f
-1,1,1,1,1,1,1,1,  # 80 - 87
-1,1,1,1,1,1,1,1,  # 88 - 8f
-1,1,1,1,1,1,1,1,  # 90 - 97
-1,1,1,1,1,1,1,1,  # 98 - 9f
-1,1,1,1,1,1,1,1,  # a0 - a7
-1,1,1,1,1,1,1,1,  # a8 - af
-1,1,1,1,1,1,1,1,  # b0 - b7
-1,1,1,1,1,1,1,1,  # b8 - bf
-1,1,1,1,1,1,1,1,  # c0 - c7
-1,1,1,1,1,1,1,1,  # c8 - cf
-1,1,1,1,1,1,1,1,  # d0 - d7
-1,1,1,1,1,1,1,1,  # d8 - df
-1,1,1,1,1,1,1,1,  # e0 - e7
-1,1,1,1,1,1,1,1,  # e8 - ef
-1,1,1,1,1,1,1,1,  # f0 - f7
-1,1,1,1,1,1,1,1,  # f8 - ff
-)
-
-HZ_ST = (
-MachineState.START,MachineState.ERROR,     3,MachineState.START,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,# 00-07
-MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,# 08-0f
-MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,     4,MachineState.ERROR,# 10-17
-     5,MachineState.ERROR,     6,MachineState.ERROR,     5,     5,     4,MachineState.ERROR,# 18-1f
-     4,MachineState.ERROR,     4,     4,     4,MachineState.ERROR,     4,MachineState.ERROR,# 20-27
-     4,MachineState.ITS_ME,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,# 28-2f
-)
-
-HZ_CHAR_LEN_TABLE = (0, 0, 0, 0, 0, 0)
-
-HZ_SM_MODEL = {'class_table': HZ_CLS,
-               'class_factor': 6,
-               'state_table': HZ_ST,
-               'char_len_table': HZ_CHAR_LEN_TABLE,
-               'name': "HZ-GB-2312",
-               'language': 'Chinese'}
-
-ISO2022CN_CLS = (
-2,0,0,0,0,0,0,0,  # 00 - 07
-0,0,0,0,0,0,0,0,  # 08 - 0f
-0,0,0,0,0,0,0,0,  # 10 - 17
-0,0,0,1,0,0,0,0,  # 18 - 1f
-0,0,0,0,0,0,0,0,  # 20 - 27
-0,3,0,0,0,0,0,0,  # 28 - 2f
-0,0,0,0,0,0,0,0,  # 30 - 37
-0,0,0,0,0,0,0,0,  # 38 - 3f
-0,0,0,4,0,0,0,0,  # 40 - 47
-0,0,0,0,0,0,0,0,  # 48 - 4f
-0,0,0,0,0,0,0,0,  # 50 - 57
-0,0,0,0,0,0,0,0,  # 58 - 5f
-0,0,0,0,0,0,0,0,  # 60 - 67
-0,0,0,0,0,0,0,0,  # 68 - 6f
-0,0,0,0,0,0,0,0,  # 70 - 77
-0,0,0,0,0,0,0,0,  # 78 - 7f
-2,2,2,2,2,2,2,2,  # 80 - 87
-2,2,2,2,2,2,2,2,  # 88 - 8f
-2,2,2,2,2,2,2,2,  # 90 - 97
-2,2,2,2,2,2,2,2,  # 98 - 9f
-2,2,2,2,2,2,2,2,  # a0 - a7
-2,2,2,2,2,2,2,2,  # a8 - af
-2,2,2,2,2,2,2,2,  # b0 - b7
-2,2,2,2,2,2,2,2,  # b8 - bf
-2,2,2,2,2,2,2,2,  # c0 - c7
-2,2,2,2,2,2,2,2,  # c8 - cf
-2,2,2,2,2,2,2,2,  # d0 - d7
-2,2,2,2,2,2,2,2,  # d8 - df
-2,2,2,2,2,2,2,2,  # e0 - e7
-2,2,2,2,2,2,2,2,  # e8 - ef
-2,2,2,2,2,2,2,2,  # f0 - f7
-2,2,2,2,2,2,2,2,  # f8 - ff
-)
-
-ISO2022CN_ST = (
-MachineState.START,     3,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,# 00-07
-MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,# 08-0f
-MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,# 10-17
-MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     4,MachineState.ERROR,# 18-1f
-MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,# 20-27
-     5,     6,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,# 28-2f
-MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,# 30-37
-MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,MachineState.START,# 38-3f
-)
-
-ISO2022CN_CHAR_LEN_TABLE = (0, 0, 0, 0, 0, 0, 0, 0, 0)
-
-ISO2022CN_SM_MODEL = {'class_table': ISO2022CN_CLS,
-                      'class_factor': 9,
-                      'state_table': ISO2022CN_ST,
-                      'char_len_table': ISO2022CN_CHAR_LEN_TABLE,
-                      'name': "ISO-2022-CN",
-                      'language': 'Chinese'}
-
-ISO2022JP_CLS = (
-2,0,0,0,0,0,0,0,  # 00 - 07
-0,0,0,0,0,0,2,2,  # 08 - 0f
-0,0,0,0,0,0,0,0,  # 10 - 17
-0,0,0,1,0,0,0,0,  # 18 - 1f
-0,0,0,0,7,0,0,0,  # 20 - 27
-3,0,0,0,0,0,0,0,  # 28 - 2f
-0,0,0,0,0,0,0,0,  # 30 - 37
-0,0,0,0,0,0,0,0,  # 38 - 3f
-6,0,4,0,8,0,0,0,  # 40 - 47
-0,9,5,0,0,0,0,0,  # 48 - 4f
-0,0,0,0,0,0,0,0,  # 50 - 57
-0,0,0,0,0,0,0,0,  # 58 - 5f
-0,0,0,0,0,0,0,0,  # 60 - 67
-0,0,0,0,0,0,0,0,  # 68 - 6f
-0,0,0,0,0,0,0,0,  # 70 - 77
-0,0,0,0,0,0,0,0,  # 78 - 7f
-2,2,2,2,2,2,2,2,  # 80 - 87
-2,2,2,2,2,2,2,2,  # 88 - 8f
-2,2,2,2,2,2,2,2,  # 90 - 97
-2,2,2,2,2,2,2,2,  # 98 - 9f
-2,2,2,2,2,2,2,2,  # a0 - a7
-2,2,2,2,2,2,2,2,  # a8 - af
-2,2,2,2,2,2,2,2,  # b0 - b7
-2,2,2,2,2,2,2,2,  # b8 - bf
-2,2,2,2,2,2,2,2,  # c0 - c7
-2,2,2,2,2,2,2,2,  # c8 - cf
-2,2,2,2,2,2,2,2,  # d0 - d7
-2,2,2,2,2,2,2,2,  # d8 - df
-2,2,2,2,2,2,2,2,  # e0 - e7
-2,2,2,2,2,2,2,2,  # e8 - ef
-2,2,2,2,2,2,2,2,  # f0 - f7
-2,2,2,2,2,2,2,2,  # f8 - ff
-)
-
-ISO2022JP_ST = (
-MachineState.START,     3,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,# 00-07
-MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,# 08-0f
-MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,# 10-17
-MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,# 18-1f
-MachineState.ERROR,     5,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     4,MachineState.ERROR,MachineState.ERROR,# 20-27
-MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     6,MachineState.ITS_ME,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,# 28-2f
-MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,# 30-37
-MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,# 38-3f
-MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,MachineState.START,MachineState.START,# 40-47
-)
-
-ISO2022JP_CHAR_LEN_TABLE = (0, 0, 0, 0, 0, 0, 0, 0, 0, 0)
-
-ISO2022JP_SM_MODEL = {'class_table': ISO2022JP_CLS,
-                      'class_factor': 10,
-                      'state_table': ISO2022JP_ST,
-                      'char_len_table': ISO2022JP_CHAR_LEN_TABLE,
-                      'name': "ISO-2022-JP",
-                      'language': 'Japanese'}
-
-ISO2022KR_CLS = (
-2,0,0,0,0,0,0,0,  # 00 - 07
-0,0,0,0,0,0,0,0,  # 08 - 0f
-0,0,0,0,0,0,0,0,  # 10 - 17
-0,0,0,1,0,0,0,0,  # 18 - 1f
-0,0,0,0,3,0,0,0,  # 20 - 27
-0,4,0,0,0,0,0,0,  # 28 - 2f
-0,0,0,0,0,0,0,0,  # 30 - 37
-0,0,0,0,0,0,0,0,  # 38 - 3f
-0,0,0,5,0,0,0,0,  # 40 - 47
-0,0,0,0,0,0,0,0,  # 48 - 4f
-0,0,0,0,0,0,0,0,  # 50 - 57
-0,0,0,0,0,0,0,0,  # 58 - 5f
-0,0,0,0,0,0,0,0,  # 60 - 67
-0,0,0,0,0,0,0,0,  # 68 - 6f
-0,0,0,0,0,0,0,0,  # 70 - 77
-0,0,0,0,0,0,0,0,  # 78 - 7f
-2,2,2,2,2,2,2,2,  # 80 - 87
-2,2,2,2,2,2,2,2,  # 88 - 8f
-2,2,2,2,2,2,2,2,  # 90 - 97
-2,2,2,2,2,2,2,2,  # 98 - 9f
-2,2,2,2,2,2,2,2,  # a0 - a7
-2,2,2,2,2,2,2,2,  # a8 - af
-2,2,2,2,2,2,2,2,  # b0 - b7
-2,2,2,2,2,2,2,2,  # b8 - bf
-2,2,2,2,2,2,2,2,  # c0 - c7
-2,2,2,2,2,2,2,2,  # c8 - cf
-2,2,2,2,2,2,2,2,  # d0 - d7
-2,2,2,2,2,2,2,2,  # d8 - df
-2,2,2,2,2,2,2,2,  # e0 - e7
-2,2,2,2,2,2,2,2,  # e8 - ef
-2,2,2,2,2,2,2,2,  # f0 - f7
-2,2,2,2,2,2,2,2,  # f8 - ff
-)
-
-ISO2022KR_ST = (
-MachineState.START,     3,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,# 00-07
-MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,# 08-0f
-MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     4,MachineState.ERROR,MachineState.ERROR,# 10-17
-MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     5,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,# 18-1f
-MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.START,MachineState.START,MachineState.START,MachineState.START,# 20-27
-)
-
-ISO2022KR_CHAR_LEN_TABLE = (0, 0, 0, 0, 0, 0)
-
-ISO2022KR_SM_MODEL = {'class_table': ISO2022KR_CLS,
-                      'class_factor': 6,
-                      'state_table': ISO2022KR_ST,
-                      'char_len_table': ISO2022KR_CHAR_LEN_TABLE,
-                      'name': "ISO-2022-KR",
-                      'language': 'Korean'}
-
-
diff --git a/venv/lib/python3.7/site-packages/chardet/eucjpprober.py b/venv/lib/python3.7/site-packages/chardet/eucjpprober.py
deleted file mode 100644
index 20ce8f7..0000000
--- a/venv/lib/python3.7/site-packages/chardet/eucjpprober.py
+++ /dev/null
@@ -1,92 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is mozilla.org code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .enums import ProbingState, MachineState
-from .mbcharsetprober import MultiByteCharSetProber
-from .codingstatemachine import CodingStateMachine
-from .chardistribution import EUCJPDistributionAnalysis
-from .jpcntx import EUCJPContextAnalysis
-from .mbcssm import EUCJP_SM_MODEL
-
-
-class EUCJPProber(MultiByteCharSetProber):
-    def __init__(self):
-        super(EUCJPProber, self).__init__()
-        self.coding_sm = CodingStateMachine(EUCJP_SM_MODEL)
-        self.distribution_analyzer = EUCJPDistributionAnalysis()
-        self.context_analyzer = EUCJPContextAnalysis()
-        self.reset()
-
-    def reset(self):
-        super(EUCJPProber, self).reset()
-        self.context_analyzer.reset()
-
-    @property
-    def charset_name(self):
-        return "EUC-JP"
-
-    @property
-    def language(self):
-        return "Japanese"
-
-    def feed(self, byte_str):
-        for i in range(len(byte_str)):
-            # PY3K: byte_str is a byte array, so byte_str[i] is an int, not a byte
-            coding_state = self.coding_sm.next_state(byte_str[i])
-            if coding_state == MachineState.ERROR:
-                self.logger.debug('%s %s prober hit error at byte %s',
-                                  self.charset_name, self.language, i)
-                self._state = ProbingState.NOT_ME
-                break
-            elif coding_state == MachineState.ITS_ME:
-                self._state = ProbingState.FOUND_IT
-                break
-            elif coding_state == MachineState.START:
-                char_len = self.coding_sm.get_current_charlen()
-                if i == 0:
-                    self._last_char[1] = byte_str[0]
-                    self.context_analyzer.feed(self._last_char, char_len)
-                    self.distribution_analyzer.feed(self._last_char, char_len)
-                else:
-                    self.context_analyzer.feed(byte_str[i - 1:i + 1],
-                                                char_len)
-                    self.distribution_analyzer.feed(byte_str[i - 1:i + 1],
-                                                     char_len)
-
-        self._last_char[0] = byte_str[-1]
-
-        if self.state == ProbingState.DETECTING:
-            if (self.context_analyzer.got_enough_data() and
-               (self.get_confidence() > self.SHORTCUT_THRESHOLD)):
-                self._state = ProbingState.FOUND_IT
-
-        return self.state
-
-    def get_confidence(self):
-        context_conf = self.context_analyzer.get_confidence()
-        distrib_conf = self.distribution_analyzer.get_confidence()
-        return max(context_conf, distrib_conf)
diff --git a/venv/lib/python3.7/site-packages/chardet/euckrfreq.py b/venv/lib/python3.7/site-packages/chardet/euckrfreq.py
deleted file mode 100644
index b68078c..0000000
--- a/venv/lib/python3.7/site-packages/chardet/euckrfreq.py
+++ /dev/null
@@ -1,195 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-# Sampling from about 20M text materials include literature and computer technology
-
-# 128  --> 0.79
-# 256  --> 0.92
-# 512  --> 0.986
-# 1024 --> 0.99944
-# 2048 --> 0.99999
-#
-# Idea Distribution Ratio = 0.98653 / (1-0.98653) = 73.24
-# Random Distribution Ration = 512 / (2350-512) = 0.279.
-#
-# Typical Distribution Ratio
-
-EUCKR_TYPICAL_DISTRIBUTION_RATIO = 6.0
-
-EUCKR_TABLE_SIZE = 2352
-
-# Char to FreqOrder table ,
-EUCKR_CHAR_TO_FREQ_ORDER = (
-  13, 130, 120,1396, 481,1719,1720, 328, 609, 212,1721, 707, 400, 299,1722,  87,
-1397,1723, 104, 536,1117,1203,1724,1267, 685,1268, 508,1725,1726,1727,1728,1398,
-1399,1729,1730,1731, 141, 621, 326,1057, 368,1732, 267, 488,  20,1733,1269,1734,
- 945,1400,1735,  47, 904,1270,1736,1737, 773, 248,1738, 409, 313, 786, 429,1739,
- 116, 987, 813,1401, 683,  75,1204, 145,1740,1741,1742,1743,  16, 847, 667, 622,
- 708,1744,1745,1746, 966, 787, 304, 129,1747,  60, 820, 123, 676,1748,1749,1750,
-1751, 617,1752, 626,1753,1754,1755,1756, 653,1757,1758,1759,1760,1761,1762, 856,
- 344,1763,1764,1765,1766,  89, 401, 418, 806, 905, 848,1767,1768,1769, 946,1205,
- 709,1770,1118,1771, 241,1772,1773,1774,1271,1775, 569,1776, 999,1777,1778,1779,
-1780, 337, 751,1058,  28, 628, 254,1781, 177, 906, 270, 349, 891,1079,1782,  19,
-1783, 379,1784, 315,1785, 629, 754,1402, 559,1786, 636, 203,1206,1787, 710, 567,
-1788, 935, 814,1789,1790,1207, 766, 528,1791,1792,1208,1793,1794,1795,1796,1797,
-1403,1798,1799, 533,1059,1404,1405,1156,1406, 936, 884,1080,1800, 351,1801,1802,
-1803,1804,1805, 801,1806,1807,1808,1119,1809,1157, 714, 474,1407,1810, 298, 899,
- 885,1811,1120, 802,1158,1812, 892,1813,1814,1408, 659,1815,1816,1121,1817,1818,
-1819,1820,1821,1822, 319,1823, 594, 545,1824, 815, 937,1209,1825,1826, 573,1409,
-1022,1827,1210,1828,1829,1830,1831,1832,1833, 556, 722, 807,1122,1060,1834, 697,
-1835, 900, 557, 715,1836,1410, 540,1411, 752,1159, 294, 597,1211, 976, 803, 770,
-1412,1837,1838,  39, 794,1413, 358,1839, 371, 925,1840, 453, 661, 788, 531, 723,
- 544,1023,1081, 869,  91,1841, 392, 430, 790, 602,1414, 677,1082, 457,1415,1416,
-1842,1843, 475, 327,1024,1417, 795, 121,1844, 733, 403,1418,1845,1846,1847, 300,
- 119, 711,1212, 627,1848,1272, 207,1849,1850, 796,1213, 382,1851, 519,1852,1083,
- 893,1853,1854,1855, 367, 809, 487, 671,1856, 663,1857,1858, 956, 471, 306, 857,
-1859,1860,1160,1084,1861,1862,1863,1864,1865,1061,1866,1867,1868,1869,1870,1871,
- 282,  96, 574,1872, 502,1085,1873,1214,1874, 907,1875,1876, 827, 977,1419,1420,
-1421, 268,1877,1422,1878,1879,1880, 308,1881,   2, 537,1882,1883,1215,1884,1885,
- 127, 791,1886,1273,1423,1887,  34, 336, 404, 643,1888, 571, 654, 894, 840,1889,
-   0, 886,1274, 122, 575, 260, 908, 938,1890,1275, 410, 316,1891,1892, 100,1893,
-1894,1123,  48,1161,1124,1025,1895, 633, 901,1276,1896,1897, 115, 816,1898, 317,
-1899, 694,1900, 909, 734,1424, 572, 866,1425, 691,  85, 524,1010, 543, 394, 841,
-1901,1902,1903,1026,1904,1905,1906,1907,1908,1909,  30, 451, 651, 988, 310,1910,
-1911,1426, 810,1216,  93,1912,1913,1277,1217,1914, 858, 759,  45,  58, 181, 610,
- 269,1915,1916, 131,1062, 551, 443,1000, 821,1427, 957, 895,1086,1917,1918, 375,
-1919, 359,1920, 687,1921, 822,1922, 293,1923,1924,  40, 662, 118, 692,  29, 939,
- 887, 640, 482, 174,1925,  69,1162, 728,1428, 910,1926,1278,1218,1279, 386, 870,
- 217, 854,1163, 823,1927,1928,1929,1930, 834,1931,  78,1932, 859,1933,1063,1934,
-1935,1936,1937, 438,1164, 208, 595,1938,1939,1940,1941,1219,1125,1942, 280, 888,
-1429,1430,1220,1431,1943,1944,1945,1946,1947,1280, 150, 510,1432,1948,1949,1950,
-1951,1952,1953,1954,1011,1087,1955,1433,1043,1956, 881,1957, 614, 958,1064,1065,
-1221,1958, 638,1001, 860, 967, 896,1434, 989, 492, 553,1281,1165,1959,1282,1002,
-1283,1222,1960,1961,1962,1963,  36, 383, 228, 753, 247, 454,1964, 876, 678,1965,
-1966,1284, 126, 464, 490, 835, 136, 672, 529, 940,1088,1435, 473,1967,1968, 467,
-  50, 390, 227, 587, 279, 378, 598, 792, 968, 240, 151, 160, 849, 882,1126,1285,
- 639,1044, 133, 140, 288, 360, 811, 563,1027, 561, 142, 523,1969,1970,1971,   7,
- 103, 296, 439, 407, 506, 634, 990,1972,1973,1974,1975, 645,1976,1977,1978,1979,
-1980,1981, 236,1982,1436,1983,1984,1089, 192, 828, 618, 518,1166, 333,1127,1985,
- 818,1223,1986,1987,1988,1989,1990,1991,1992,1993, 342,1128,1286, 746, 842,1994,
-1995, 560, 223,1287,  98,   8, 189, 650, 978,1288,1996,1437,1997,  17, 345, 250,
- 423, 277, 234, 512, 226,  97, 289,  42, 167,1998, 201,1999,2000, 843, 836, 824,
- 532, 338, 783,1090, 182, 576, 436,1438,1439, 527, 500,2001, 947, 889,2002,2003,
-2004,2005, 262, 600, 314, 447,2006, 547,2007, 693, 738,1129,2008,  71,1440, 745,
- 619, 688,2009, 829,2010,2011, 147,2012,  33, 948,2013,2014,  74, 224,2015,  61,
- 191, 918, 399, 637,2016,1028,1130, 257, 902,2017,2018,2019,2020,2021,2022,2023,
-2024,2025,2026, 837,2027,2028,2029,2030, 179, 874, 591,  52, 724, 246,2031,2032,
-2033,2034,1167, 969,2035,1289, 630, 605, 911,1091,1168,2036,2037,2038,1441, 912,
-2039, 623,2040,2041, 253,1169,1290,2042,1442, 146, 620, 611, 577, 433,2043,1224,
- 719,1170, 959, 440, 437, 534,  84, 388, 480,1131, 159, 220, 198, 679,2044,1012,
- 819,1066,1443, 113,1225, 194, 318,1003,1029,2045,2046,2047,2048,1067,2049,2050,
-2051,2052,2053,  59, 913, 112,2054, 632,2055, 455, 144, 739,1291,2056, 273, 681,
- 499,2057, 448,2058,2059, 760,2060,2061, 970, 384, 169, 245,1132,2062,2063, 414,
-1444,2064,2065,  41, 235,2066, 157, 252, 877, 568, 919, 789, 580,2067, 725,2068,
-2069,1292,2070,2071,1445,2072,1446,2073,2074,  55, 588,  66,1447, 271,1092,2075,
-1226,2076, 960,1013, 372,2077,2078,2079,2080,2081,1293,2082,2083,2084,2085, 850,
-2086,2087,2088,2089,2090, 186,2091,1068, 180,2092,2093,2094, 109,1227, 522, 606,
-2095, 867,1448,1093, 991,1171, 926, 353,1133,2096, 581,2097,2098,2099,1294,1449,
-1450,2100, 596,1172,1014,1228,2101,1451,1295,1173,1229,2102,2103,1296,1134,1452,
- 949,1135,2104,2105,1094,1453,1454,1455,2106,1095,2107,2108,2109,2110,2111,2112,
-2113,2114,2115,2116,2117, 804,2118,2119,1230,1231, 805,1456, 405,1136,2120,2121,
-2122,2123,2124, 720, 701,1297, 992,1457, 927,1004,2125,2126,2127,2128,2129,2130,
-  22, 417,2131, 303,2132, 385,2133, 971, 520, 513,2134,1174,  73,1096, 231, 274,
- 962,1458, 673,2135,1459,2136, 152,1137,2137,2138,2139,2140,1005,1138,1460,1139,
-2141,2142,2143,2144,  11, 374, 844,2145, 154,1232,  46,1461,2146, 838, 830, 721,
-1233, 106,2147,  90, 428, 462, 578, 566,1175, 352,2148,2149, 538,1234, 124,1298,
-2150,1462, 761, 565,2151, 686,2152, 649,2153,  72, 173,2154, 460, 415,2155,1463,
-2156,1235, 305,2157,2158,2159,2160,2161,2162, 579,2163,2164,2165,2166,2167, 747,
-2168,2169,2170,2171,1464, 669,2172,2173,2174,2175,2176,1465,2177,  23, 530, 285,
-2178, 335, 729,2179, 397,2180,2181,2182,1030,2183,2184, 698,2185,2186, 325,2187,
-2188, 369,2189, 799,1097,1015, 348,2190,1069, 680,2191, 851,1466,2192,2193,  10,
-2194, 613, 424,2195, 979, 108, 449, 589,  27, 172,  81,1031,  80, 774, 281, 350,
-1032, 525, 301, 582,1176,2196, 674,1045,2197,2198,1467, 730, 762,2199,2200,2201,
-2202,1468,2203, 993,2204,2205, 266,1070, 963,1140,2206,2207,2208, 664,1098, 972,
-2209,2210,2211,1177,1469,1470, 871,2212,2213,2214,2215,2216,1471,2217,2218,2219,
-2220,2221,2222,2223,2224,2225,2226,2227,1472,1236,2228,2229,2230,2231,2232,2233,
-2234,2235,1299,2236,2237, 200,2238, 477, 373,2239,2240, 731, 825, 777,2241,2242,
-2243, 521, 486, 548,2244,2245,2246,1473,1300,  53, 549, 137, 875,  76, 158,2247,
-1301,1474, 469, 396,1016, 278, 712,2248, 321, 442, 503, 767, 744, 941,1237,1178,
-1475,2249,  82, 178,1141,1179, 973,2250,1302,2251, 297,2252,2253, 570,2254,2255,
-2256,  18, 450, 206,2257, 290, 292,1142,2258, 511, 162,  99, 346, 164, 735,2259,
-1476,1477,   4, 554, 343, 798,1099,2260,1100,2261,  43, 171,1303, 139, 215,2262,
-2263, 717, 775,2264,1033, 322, 216,2265, 831,2266, 149,2267,1304,2268,2269, 702,
-1238, 135, 845, 347, 309,2270, 484,2271, 878, 655, 238,1006,1478,2272,  67,2273,
- 295,2274,2275, 461,2276, 478, 942, 412,2277,1034,2278,2279,2280, 265,2281, 541,
-2282,2283,2284,2285,2286,  70, 852,1071,2287,2288,2289,2290,  21,  56, 509, 117,
- 432,2291,2292, 331, 980, 552,1101, 148, 284, 105, 393,1180,1239, 755,2293, 187,
-2294,1046,1479,2295, 340,2296,  63,1047, 230,2297,2298,1305, 763,1306, 101, 800,
- 808, 494,2299,2300,2301, 903,2302,  37,1072,  14,   5,2303,  79, 675,2304, 312,
-2305,2306,2307,2308,2309,1480,   6,1307,2310,2311,2312,   1, 470,  35,  24, 229,
-2313, 695, 210,  86, 778,  15, 784, 592, 779,  32,  77, 855, 964,2314, 259,2315,
- 501, 380,2316,2317,  83, 981, 153, 689,1308,1481,1482,1483,2318,2319, 716,1484,
-2320,2321,2322,2323,2324,2325,1485,2326,2327, 128,  57,  68, 261,1048, 211, 170,
-1240,  31,2328,  51, 435, 742,2329,2330,2331, 635,2332, 264, 456,2333,2334,2335,
- 425,2336,1486, 143, 507, 263, 943,2337, 363, 920,1487, 256,1488,1102, 243, 601,
-1489,2338,2339,2340,2341,2342,2343,2344, 861,2345,2346,2347,2348,2349,2350, 395,
-2351,1490,1491,  62, 535, 166, 225,2352,2353, 668, 419,1241, 138, 604, 928,2354,
-1181,2355,1492,1493,2356,2357,2358,1143,2359, 696,2360, 387, 307,1309, 682, 476,
-2361,2362, 332,  12, 222, 156,2363, 232,2364, 641, 276, 656, 517,1494,1495,1035,
- 416, 736,1496,2365,1017, 586,2366,2367,2368,1497,2369, 242,2370,2371,2372,1498,
-2373, 965, 713,2374,2375,2376,2377, 740, 982,1499, 944,1500,1007,2378,2379,1310,
-1501,2380,2381,2382, 785, 329,2383,2384,1502,2385,2386,2387, 932,2388,1503,2389,
-2390,2391,2392,1242,2393,2394,2395,2396,2397, 994, 950,2398,2399,2400,2401,1504,
-1311,2402,2403,2404,2405,1049, 749,2406,2407, 853, 718,1144,1312,2408,1182,1505,
-2409,2410, 255, 516, 479, 564, 550, 214,1506,1507,1313, 413, 239, 444, 339,1145,
-1036,1508,1509,1314,1037,1510,1315,2411,1511,2412,2413,2414, 176, 703, 497, 624,
- 593, 921, 302,2415, 341, 165,1103,1512,2416,1513,2417,2418,2419, 376,2420, 700,
-2421,2422,2423, 258, 768,1316,2424,1183,2425, 995, 608,2426,2427,2428,2429, 221,
-2430,2431,2432,2433,2434,2435,2436,2437, 195, 323, 726, 188, 897, 983,1317, 377,
- 644,1050, 879,2438, 452,2439,2440,2441,2442,2443,2444, 914,2445,2446,2447,2448,
- 915, 489,2449,1514,1184,2450,2451, 515,  64, 427, 495,2452, 583,2453, 483, 485,
-1038, 562, 213,1515, 748, 666,2454,2455,2456,2457, 334,2458, 780, 996,1008, 705,
-1243,2459,2460,2461,2462,2463, 114,2464, 493,1146, 366, 163,1516, 961,1104,2465,
- 291,2466,1318,1105,2467,1517, 365,2468, 355, 951,1244,2469,1319,2470, 631,2471,
-2472, 218,1320, 364, 320, 756,1518,1519,1321,1520,1322,2473,2474,2475,2476, 997,
-2477,2478,2479,2480, 665,1185,2481, 916,1521,2482,2483,2484, 584, 684,2485,2486,
- 797,2487,1051,1186,2488,2489,2490,1522,2491,2492, 370,2493,1039,1187,  65,2494,
- 434, 205, 463,1188,2495, 125, 812, 391, 402, 826, 699, 286, 398, 155, 781, 771,
- 585,2496, 590, 505,1073,2497, 599, 244, 219, 917,1018, 952, 646,1523,2498,1323,
-2499,2500,  49, 984, 354, 741,2501, 625,2502,1324,2503,1019, 190, 357, 757, 491,
-  95, 782, 868,2504,2505,2506,2507,2508,2509, 134,1524,1074, 422,1525, 898,2510,
- 161,2511,2512,2513,2514, 769,2515,1526,2516,2517, 411,1325,2518, 472,1527,2519,
-2520,2521,2522,2523,2524, 985,2525,2526,2527,2528,2529,2530, 764,2531,1245,2532,
-2533,  25, 204, 311,2534, 496,2535,1052,2536,2537,2538,2539,2540,2541,2542, 199,
- 704, 504, 468, 758, 657,1528, 196,  44, 839,1246, 272, 750,2543, 765, 862,2544,
-2545,1326,2546, 132, 615, 933,2547, 732,2548,2549,2550,1189,1529,2551, 283,1247,
-1053, 607, 929,2552,2553,2554, 930, 183, 872, 616,1040,1147,2555,1148,1020, 441,
- 249,1075,2556,2557,2558, 466, 743,2559,2560,2561,  92, 514, 426, 420, 526,2562,
-2563,2564,2565,2566,2567,2568, 185,2569,2570,2571,2572, 776,1530, 658,2573, 362,
-2574, 361, 922,1076, 793,2575,2576,2577,2578,2579,2580,1531, 251,2581,2582,2583,
-2584,1532,  54, 612, 237,1327,2585,2586, 275, 408, 647, 111,2587,1533,1106, 465,
-   3, 458,   9,  38,2588, 107, 110, 890, 209,  26, 737, 498,2589,1534,2590, 431,
- 202,  88,1535, 356, 287,1107, 660,1149,2591, 381,1536, 986,1150, 445,1248,1151,
- 974,2592,2593, 846,2594, 446, 953, 184,1249,1250, 727,2595, 923, 193, 883,2596,
-2597,2598, 102, 324, 539, 817,2599, 421,1041,2600, 832,2601,  94, 175, 197, 406,
-2602, 459,2603,2604,2605,2606,2607, 330, 555,2608,2609,2610, 706,1108, 389,2611,
-2612,2613,2614, 233,2615, 833, 558, 931, 954,1251,2616,2617,1537, 546,2618,2619,
-1009,2620,2621,2622,1538, 690,1328,2623, 955,2624,1539,2625,2626, 772,2627,2628,
-2629,2630,2631, 924, 648, 863, 603,2632,2633, 934,1540, 864, 865,2634, 642,1042,
- 670,1190,2635,2636,2637,2638, 168,2639, 652, 873, 542,1054,1541,2640,2641,2642,  # 512, 256
-)
-
diff --git a/venv/lib/python3.7/site-packages/chardet/euckrprober.py b/venv/lib/python3.7/site-packages/chardet/euckrprober.py
deleted file mode 100644
index 345a060..0000000
--- a/venv/lib/python3.7/site-packages/chardet/euckrprober.py
+++ /dev/null
@@ -1,47 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is mozilla.org code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .mbcharsetprober import MultiByteCharSetProber
-from .codingstatemachine import CodingStateMachine
-from .chardistribution import EUCKRDistributionAnalysis
-from .mbcssm import EUCKR_SM_MODEL
-
-
-class EUCKRProber(MultiByteCharSetProber):
-    def __init__(self):
-        super(EUCKRProber, self).__init__()
-        self.coding_sm = CodingStateMachine(EUCKR_SM_MODEL)
-        self.distribution_analyzer = EUCKRDistributionAnalysis()
-        self.reset()
-
-    @property
-    def charset_name(self):
-        return "EUC-KR"
-
-    @property
-    def language(self):
-        return "Korean"
diff --git a/venv/lib/python3.7/site-packages/chardet/euctwfreq.py b/venv/lib/python3.7/site-packages/chardet/euctwfreq.py
deleted file mode 100644
index ed7a995..0000000
--- a/venv/lib/python3.7/site-packages/chardet/euctwfreq.py
+++ /dev/null
@@ -1,387 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-# EUCTW frequency table
-# Converted from big5 work
-# by Taiwan's Mandarin Promotion Council
-# <http:#www.edu.tw:81/mandr/>
-
-# 128  --> 0.42261
-# 256  --> 0.57851
-# 512  --> 0.74851
-# 1024 --> 0.89384
-# 2048 --> 0.97583
-#
-# Idea Distribution Ratio = 0.74851/(1-0.74851) =2.98
-# Random Distribution Ration = 512/(5401-512)=0.105
-#
-# Typical Distribution Ratio about 25% of Ideal one, still much higher than RDR
-
-EUCTW_TYPICAL_DISTRIBUTION_RATIO = 0.75
-
-# Char to FreqOrder table ,
-EUCTW_TABLE_SIZE = 5376
-
-EUCTW_CHAR_TO_FREQ_ORDER = (
-   1,1800,1506, 255,1431, 198,   9,  82,   6,7310, 177, 202,3615,1256,2808, 110,  # 2742
-3735,  33,3241, 261,  76,  44,2113,  16,2931,2184,1176, 659,3868,  26,3404,2643,  # 2758
-1198,3869,3313,4060, 410,2211, 302, 590, 361,1963,   8, 204,  58,4296,7311,1931,  # 2774
-  63,7312,7313, 317,1614,  75, 222, 159,4061,2412,1480,7314,3500,3068, 224,2809,  # 2790
-3616,   3,  10,3870,1471,  29,2774,1135,2852,1939, 873, 130,3242,1123, 312,7315,  # 2806
-4297,2051, 507, 252, 682,7316, 142,1914, 124, 206,2932,  34,3501,3173,  64, 604,  # 2822
-7317,2494,1976,1977, 155,1990, 645, 641,1606,7318,3405, 337,  72, 406,7319,  80,  # 2838
- 630, 238,3174,1509, 263, 939,1092,2644, 756,1440,1094,3406, 449,  69,2969, 591,  # 2854
- 179,2095, 471, 115,2034,1843,  60,  50,2970, 134, 806,1868, 734,2035,3407, 180,  # 2870
- 995,1607, 156, 537,2893, 688,7320, 319,1305, 779,2144, 514,2374, 298,4298, 359,  # 2886
-2495,  90,2707,1338, 663,  11, 906,1099,2545,  20,2436, 182, 532,1716,7321, 732,  # 2902
-1376,4062,1311,1420,3175,  25,2312,1056, 113, 399, 382,1949, 242,3408,2467, 529,  # 2918
-3243, 475,1447,3617,7322, 117,  21, 656, 810,1297,2295,2329,3502,7323, 126,4063,  # 2934
- 706, 456, 150, 613,4299,  71,1118,2036,4064, 145,3069,  85, 835, 486,2114,1246,  # 2950
-1426, 428, 727,1285,1015, 800, 106, 623, 303,1281,7324,2127,2354, 347,3736, 221,  # 2966
-3503,3110,7325,1955,1153,4065,  83, 296,1199,3070, 192, 624,  93,7326, 822,1897,  # 2982
-2810,3111, 795,2064, 991,1554,1542,1592,  27,  43,2853, 859, 139,1456, 860,4300,  # 2998
- 437, 712,3871, 164,2392,3112, 695, 211,3017,2096, 195,3872,1608,3504,3505,3618,  # 3014
-3873, 234, 811,2971,2097,3874,2229,1441,3506,1615,2375, 668,2076,1638, 305, 228,  # 3030
-1664,4301, 467, 415,7327, 262,2098,1593, 239, 108, 300, 200,1033, 512,1247,2077,  # 3046
-7328,7329,2173,3176,3619,2673, 593, 845,1062,3244,  88,1723,2037,3875,1950, 212,  # 3062
- 266, 152, 149, 468,1898,4066,4302,  77, 187,7330,3018,  37,   5,2972,7331,3876,  # 3078
-7332,7333,  39,2517,4303,2894,3177,2078,  55, 148,  74,4304, 545, 483,1474,1029,  # 3094
-1665, 217,1869,1531,3113,1104,2645,4067,  24, 172,3507, 900,3877,3508,3509,4305,  # 3110
-  32,1408,2811,1312, 329, 487,2355,2247,2708, 784,2674,   4,3019,3314,1427,1788,  # 3126
- 188, 109, 499,7334,3620,1717,1789, 888,1217,3020,4306,7335,3510,7336,3315,1520,  # 3142
-3621,3878, 196,1034, 775,7337,7338, 929,1815, 249, 439,  38,7339,1063,7340, 794,  # 3158
-3879,1435,2296,  46, 178,3245,2065,7341,2376,7342, 214,1709,4307, 804,  35, 707,  # 3174
- 324,3622,1601,2546, 140, 459,4068,7343,7344,1365, 839, 272, 978,2257,2572,3409,  # 3190
-2128,1363,3623,1423, 697, 100,3071,  48,  70,1231, 495,3114,2193,7345,1294,7346,  # 3206
-2079, 462, 586,1042,3246, 853, 256, 988, 185,2377,3410,1698, 434,1084,7347,3411,  # 3222
- 314,2615,2775,4308,2330,2331, 569,2280, 637,1816,2518, 757,1162,1878,1616,3412,  # 3238
- 287,1577,2115, 768,4309,1671,2854,3511,2519,1321,3737, 909,2413,7348,4069, 933,  # 3254
-3738,7349,2052,2356,1222,4310, 765,2414,1322, 786,4311,7350,1919,1462,1677,2895,  # 3270
-1699,7351,4312,1424,2437,3115,3624,2590,3316,1774,1940,3413,3880,4070, 309,1369,  # 3286
-1130,2812, 364,2230,1653,1299,3881,3512,3882,3883,2646, 525,1085,3021, 902,2000,  # 3302
-1475, 964,4313, 421,1844,1415,1057,2281, 940,1364,3116, 376,4314,4315,1381,   7,  # 3318
-2520, 983,2378, 336,1710,2675,1845, 321,3414, 559,1131,3022,2742,1808,1132,1313,  # 3334
- 265,1481,1857,7352, 352,1203,2813,3247, 167,1089, 420,2814, 776, 792,1724,3513,  # 3350
-4071,2438,3248,7353,4072,7354, 446, 229, 333,2743, 901,3739,1200,1557,4316,2647,  # 3366
-1920, 395,2744,2676,3740,4073,1835, 125, 916,3178,2616,4317,7355,7356,3741,7357,  # 3382
-7358,7359,4318,3117,3625,1133,2547,1757,3415,1510,2313,1409,3514,7360,2145, 438,  # 3398
-2591,2896,2379,3317,1068, 958,3023, 461, 311,2855,2677,4074,1915,3179,4075,1978,  # 3414
- 383, 750,2745,2617,4076, 274, 539, 385,1278,1442,7361,1154,1964, 384, 561, 210,  # 3430
-  98,1295,2548,3515,7362,1711,2415,1482,3416,3884,2897,1257, 129,7363,3742, 642,  # 3446
- 523,2776,2777,2648,7364, 141,2231,1333,  68, 176, 441, 876, 907,4077, 603,2592,  # 3462
- 710, 171,3417, 404, 549,  18,3118,2393,1410,3626,1666,7365,3516,4319,2898,4320,  # 3478
-7366,2973, 368,7367, 146, 366,  99, 871,3627,1543, 748, 807,1586,1185,  22,2258,  # 3494
- 379,3743,3180,7368,3181, 505,1941,2618,1991,1382,2314,7369, 380,2357, 218, 702,  # 3510
-1817,1248,3418,3024,3517,3318,3249,7370,2974,3628, 930,3250,3744,7371,  59,7372,  # 3526
- 585, 601,4078, 497,3419,1112,1314,4321,1801,7373,1223,1472,2174,7374, 749,1836,  # 3542
- 690,1899,3745,1772,3885,1476, 429,1043,1790,2232,2116, 917,4079, 447,1086,1629,  # 3558
-7375, 556,7376,7377,2020,1654, 844,1090, 105, 550, 966,1758,2815,1008,1782, 686,  # 3574
-1095,7378,2282, 793,1602,7379,3518,2593,4322,4080,2933,2297,4323,3746, 980,2496,  # 3590
- 544, 353, 527,4324, 908,2678,2899,7380, 381,2619,1942,1348,7381,1341,1252, 560,  # 3606
-3072,7382,3420,2856,7383,2053, 973, 886,2080, 143,4325,7384,7385, 157,3886, 496,  # 3622
-4081,  57, 840, 540,2038,4326,4327,3421,2117,1445, 970,2259,1748,1965,2081,4082,  # 3638
-3119,1234,1775,3251,2816,3629, 773,1206,2129,1066,2039,1326,3887,1738,1725,4083,  # 3654
- 279,3120,  51,1544,2594, 423,1578,2130,2066, 173,4328,1879,7386,7387,1583, 264,  # 3670
- 610,3630,4329,2439, 280, 154,7388,7389,7390,1739, 338,1282,3073, 693,2857,1411,  # 3686
-1074,3747,2440,7391,4330,7392,7393,1240, 952,2394,7394,2900,1538,2679, 685,1483,  # 3702
-4084,2468,1436, 953,4085,2054,4331, 671,2395,  79,4086,2441,3252, 608, 567,2680,  # 3718
-3422,4087,4088,1691, 393,1261,1791,2396,7395,4332,7396,7397,7398,7399,1383,1672,  # 3734
-3748,3182,1464, 522,1119, 661,1150, 216, 675,4333,3888,1432,3519, 609,4334,2681,  # 3750
-2397,7400,7401,7402,4089,3025,   0,7403,2469, 315, 231,2442, 301,3319,4335,2380,  # 3766
-7404, 233,4090,3631,1818,4336,4337,7405,  96,1776,1315,2082,7406, 257,7407,1809,  # 3782
-3632,2709,1139,1819,4091,2021,1124,2163,2778,1777,2649,7408,3074, 363,1655,3183,  # 3798
-7409,2975,7410,7411,7412,3889,1567,3890, 718, 103,3184, 849,1443, 341,3320,2934,  # 3814
-1484,7413,1712, 127,  67, 339,4092,2398, 679,1412, 821,7414,7415, 834, 738, 351,  # 3830
-2976,2146, 846, 235,1497,1880, 418,1992,3749,2710, 186,1100,2147,2746,3520,1545,  # 3846
-1355,2935,2858,1377, 583,3891,4093,2573,2977,7416,1298,3633,1078,2549,3634,2358,  # 3862
-  78,3750,3751, 267,1289,2099,2001,1594,4094, 348, 369,1274,2194,2175,1837,4338,  # 3878
-1820,2817,3635,2747,2283,2002,4339,2936,2748, 144,3321, 882,4340,3892,2749,3423,  # 3894
-4341,2901,7417,4095,1726, 320,7418,3893,3026, 788,2978,7419,2818,1773,1327,2859,  # 3910
-3894,2819,7420,1306,4342,2003,1700,3752,3521,2359,2650, 787,2022, 506, 824,3636,  # 3926
- 534, 323,4343,1044,3322,2023,1900, 946,3424,7421,1778,1500,1678,7422,1881,4344,  # 3942
- 165, 243,4345,3637,2521, 123, 683,4096, 764,4346,  36,3895,1792, 589,2902, 816,  # 3958
- 626,1667,3027,2233,1639,1555,1622,3753,3896,7423,3897,2860,1370,1228,1932, 891,  # 3974
-2083,2903, 304,4097,7424, 292,2979,2711,3522, 691,2100,4098,1115,4347, 118, 662,  # 3990
-7425, 611,1156, 854,2381,1316,2861,   2, 386, 515,2904,7426,7427,3253, 868,2234,  # 4006
-1486, 855,2651, 785,2212,3028,7428,1040,3185,3523,7429,3121, 448,7430,1525,7431,  # 4022
-2164,4348,7432,3754,7433,4099,2820,3524,3122, 503, 818,3898,3123,1568, 814, 676,  # 4038
-1444, 306,1749,7434,3755,1416,1030, 197,1428, 805,2821,1501,4349,7435,7436,7437,  # 4054
-1993,7438,4350,7439,7440,2195,  13,2779,3638,2980,3124,1229,1916,7441,3756,2131,  # 4070
-7442,4100,4351,2399,3525,7443,2213,1511,1727,1120,7444,7445, 646,3757,2443, 307,  # 4086
-7446,7447,1595,3186,7448,7449,7450,3639,1113,1356,3899,1465,2522,2523,7451, 519,  # 4102
-7452, 128,2132,  92,2284,1979,7453,3900,1512, 342,3125,2196,7454,2780,2214,1980,  # 4118
-3323,7455, 290,1656,1317, 789, 827,2360,7456,3758,4352, 562, 581,3901,7457, 401,  # 4134
-4353,2248,  94,4354,1399,2781,7458,1463,2024,4355,3187,1943,7459, 828,1105,4101,  # 4150
-1262,1394,7460,4102, 605,4356,7461,1783,2862,7462,2822, 819,2101, 578,2197,2937,  # 4166
-7463,1502, 436,3254,4103,3255,2823,3902,2905,3425,3426,7464,2712,2315,7465,7466,  # 4182
-2332,2067,  23,4357, 193, 826,3759,2102, 699,1630,4104,3075, 390,1793,1064,3526,  # 4198
-7467,1579,3076,3077,1400,7468,4105,1838,1640,2863,7469,4358,4359, 137,4106, 598,  # 4214
-3078,1966, 780, 104, 974,2938,7470, 278, 899, 253, 402, 572, 504, 493,1339,7471,  # 4230
-3903,1275,4360,2574,2550,7472,3640,3029,3079,2249, 565,1334,2713, 863,  41,7473,  # 4246
-7474,4361,7475,1657,2333,  19, 463,2750,4107, 606,7476,2981,3256,1087,2084,1323,  # 4262
-2652,2982,7477,1631,1623,1750,4108,2682,7478,2864, 791,2714,2653,2334, 232,2416,  # 4278
-7479,2983,1498,7480,2654,2620, 755,1366,3641,3257,3126,2025,1609, 119,1917,3427,  # 4294
- 862,1026,4109,7481,3904,3760,4362,3905,4363,2260,1951,2470,7482,1125, 817,4110,  # 4310
-4111,3906,1513,1766,2040,1487,4112,3030,3258,2824,3761,3127,7483,7484,1507,7485,  # 4326
-2683, 733,  40,1632,1106,2865, 345,4113, 841,2524, 230,4364,2984,1846,3259,3428,  # 4342
-7486,1263, 986,3429,7487, 735, 879, 254,1137, 857, 622,1300,1180,1388,1562,3907,  # 4358
-3908,2939, 967,2751,2655,1349, 592,2133,1692,3324,2985,1994,4114,1679,3909,1901,  # 4374
-2185,7488, 739,3642,2715,1296,1290,7489,4115,2198,2199,1921,1563,2595,2551,1870,  # 4390
-2752,2986,7490, 435,7491, 343,1108, 596,  17,1751,4365,2235,3430,3643,7492,4366,  # 4406
- 294,3527,2940,1693, 477, 979, 281,2041,3528, 643,2042,3644,2621,2782,2261,1031,  # 4422
-2335,2134,2298,3529,4367, 367,1249,2552,7493,3530,7494,4368,1283,3325,2004, 240,  # 4438
-1762,3326,4369,4370, 836,1069,3128, 474,7495,2148,2525, 268,3531,7496,3188,1521,  # 4454
-1284,7497,1658,1546,4116,7498,3532,3533,7499,4117,3327,2684,1685,4118, 961,1673,  # 4470
-2622, 190,2005,2200,3762,4371,4372,7500, 570,2497,3645,1490,7501,4373,2623,3260,  # 4486
-1956,4374, 584,1514, 396,1045,1944,7502,4375,1967,2444,7503,7504,4376,3910, 619,  # 4502
-7505,3129,3261, 215,2006,2783,2553,3189,4377,3190,4378, 763,4119,3763,4379,7506,  # 4518
-7507,1957,1767,2941,3328,3646,1174, 452,1477,4380,3329,3130,7508,2825,1253,2382,  # 4534
-2186,1091,2285,4120, 492,7509, 638,1169,1824,2135,1752,3911, 648, 926,1021,1324,  # 4550
-4381, 520,4382, 997, 847,1007, 892,4383,3764,2262,1871,3647,7510,2400,1784,4384,  # 4566
-1952,2942,3080,3191,1728,4121,2043,3648,4385,2007,1701,3131,1551,  30,2263,4122,  # 4582
-7511,2026,4386,3534,7512, 501,7513,4123, 594,3431,2165,1821,3535,3432,3536,3192,  # 4598
- 829,2826,4124,7514,1680,3132,1225,4125,7515,3262,4387,4126,3133,2336,7516,4388,  # 4614
-4127,7517,3912,3913,7518,1847,2383,2596,3330,7519,4389, 374,3914, 652,4128,4129,  # 4630
- 375,1140, 798,7520,7521,7522,2361,4390,2264, 546,1659, 138,3031,2445,4391,7523,  # 4646
-2250, 612,1848, 910, 796,3765,1740,1371, 825,3766,3767,7524,2906,2554,7525, 692,  # 4662
- 444,3032,2624, 801,4392,4130,7526,1491, 244,1053,3033,4131,4132, 340,7527,3915,  # 4678
-1041,2987, 293,1168,  87,1357,7528,1539, 959,7529,2236, 721, 694,4133,3768, 219,  # 4694
-1478, 644,1417,3331,2656,1413,1401,1335,1389,3916,7530,7531,2988,2362,3134,1825,  # 4710
- 730,1515, 184,2827,  66,4393,7532,1660,2943, 246,3332, 378,1457, 226,3433, 975,  # 4726
-3917,2944,1264,3537, 674, 696,7533, 163,7534,1141,2417,2166, 713,3538,3333,4394,  # 4742
-3918,7535,7536,1186,  15,7537,1079,1070,7538,1522,3193,3539, 276,1050,2716, 758,  # 4758
-1126, 653,2945,3263,7539,2337, 889,3540,3919,3081,2989, 903,1250,4395,3920,3434,  # 4774
-3541,1342,1681,1718, 766,3264, 286,  89,2946,3649,7540,1713,7541,2597,3334,2990,  # 4790
-7542,2947,2215,3194,2866,7543,4396,2498,2526, 181, 387,1075,3921, 731,2187,3335,  # 4806
-7544,3265, 310, 313,3435,2299, 770,4134,  54,3034, 189,4397,3082,3769,3922,7545,  # 4822
-1230,1617,1849, 355,3542,4135,4398,3336, 111,4136,3650,1350,3135,3436,3035,4137,  # 4838
-2149,3266,3543,7546,2784,3923,3924,2991, 722,2008,7547,1071, 247,1207,2338,2471,  # 4854
-1378,4399,2009, 864,1437,1214,4400, 373,3770,1142,2216, 667,4401, 442,2753,2555,  # 4870
-3771,3925,1968,4138,3267,1839, 837, 170,1107, 934,1336,1882,7548,7549,2118,4139,  # 4886
-2828, 743,1569,7550,4402,4140, 582,2384,1418,3437,7551,1802,7552, 357,1395,1729,  # 4902
-3651,3268,2418,1564,2237,7553,3083,3772,1633,4403,1114,2085,4141,1532,7554, 482,  # 4918
-2446,4404,7555,7556,1492, 833,1466,7557,2717,3544,1641,2829,7558,1526,1272,3652,  # 4934
-4142,1686,1794, 416,2556,1902,1953,1803,7559,3773,2785,3774,1159,2316,7560,2867,  # 4950
-4405,1610,1584,3036,2419,2754, 443,3269,1163,3136,7561,7562,3926,7563,4143,2499,  # 4966
-3037,4406,3927,3137,2103,1647,3545,2010,1872,4144,7564,4145, 431,3438,7565, 250,  # 4982
-  97,  81,4146,7566,1648,1850,1558, 160, 848,7567, 866, 740,1694,7568,2201,2830,  # 4998
-3195,4147,4407,3653,1687, 950,2472, 426, 469,3196,3654,3655,3928,7569,7570,1188,  # 5014
- 424,1995, 861,3546,4148,3775,2202,2685, 168,1235,3547,4149,7571,2086,1674,4408,  # 5030
-3337,3270, 220,2557,1009,7572,3776, 670,2992, 332,1208, 717,7573,7574,3548,2447,  # 5046
-3929,3338,7575, 513,7576,1209,2868,3339,3138,4409,1080,7577,7578,7579,7580,2527,  # 5062
-3656,3549, 815,1587,3930,3931,7581,3550,3439,3777,1254,4410,1328,3038,1390,3932,  # 5078
-1741,3933,3778,3934,7582, 236,3779,2448,3271,7583,7584,3657,3780,1273,3781,4411,  # 5094
-7585, 308,7586,4412, 245,4413,1851,2473,1307,2575, 430, 715,2136,2449,7587, 270,  # 5110
- 199,2869,3935,7588,3551,2718,1753, 761,1754, 725,1661,1840,4414,3440,3658,7589,  # 5126
-7590, 587,  14,3272, 227,2598, 326, 480,2265, 943,2755,3552, 291, 650,1883,7591,  # 5142
-1702,1226, 102,1547,  62,3441, 904,4415,3442,1164,4150,7592,7593,1224,1548,2756,  # 5158
- 391, 498,1493,7594,1386,1419,7595,2055,1177,4416, 813, 880,1081,2363, 566,1145,  # 5174
-4417,2286,1001,1035,2558,2599,2238, 394,1286,7596,7597,2068,7598,  86,1494,1730,  # 5190
-3936, 491,1588, 745, 897,2948, 843,3340,3937,2757,2870,3273,1768, 998,2217,2069,  # 5206
- 397,1826,1195,1969,3659,2993,3341, 284,7599,3782,2500,2137,2119,1903,7600,3938,  # 5222
-2150,3939,4151,1036,3443,1904, 114,2559,4152, 209,1527,7601,7602,2949,2831,2625,  # 5238
-2385,2719,3139, 812,2560,7603,3274,7604,1559, 737,1884,3660,1210, 885,  28,2686,  # 5254
-3553,3783,7605,4153,1004,1779,4418,7606, 346,1981,2218,2687,4419,3784,1742, 797,  # 5270
-1642,3940,1933,1072,1384,2151, 896,3941,3275,3661,3197,2871,3554,7607,2561,1958,  # 5286
-4420,2450,1785,7608,7609,7610,3942,4154,1005,1308,3662,4155,2720,4421,4422,1528,  # 5302
-2600, 161,1178,4156,1982, 987,4423,1101,4157, 631,3943,1157,3198,2420,1343,1241,  # 5318
-1016,2239,2562, 372, 877,2339,2501,1160, 555,1934, 911,3944,7611, 466,1170, 169,  # 5334
-1051,2907,2688,3663,2474,2994,1182,2011,2563,1251,2626,7612, 992,2340,3444,1540,  # 5350
-2721,1201,2070,2401,1996,2475,7613,4424, 528,1922,2188,1503,1873,1570,2364,3342,  # 5366
-3276,7614, 557,1073,7615,1827,3445,2087,2266,3140,3039,3084, 767,3085,2786,4425,  # 5382
-1006,4158,4426,2341,1267,2176,3664,3199, 778,3945,3200,2722,1597,2657,7616,4427,  # 5398
-7617,3446,7618,7619,7620,3277,2689,1433,3278, 131,  95,1504,3946, 723,4159,3141,  # 5414
-1841,3555,2758,2189,3947,2027,2104,3665,7621,2995,3948,1218,7622,3343,3201,3949,  # 5430
-4160,2576, 248,1634,3785, 912,7623,2832,3666,3040,3786, 654,  53,7624,2996,7625,  # 5446
-1688,4428, 777,3447,1032,3950,1425,7626, 191, 820,2120,2833, 971,4429, 931,3202,  # 5462
- 135, 664, 783,3787,1997, 772,2908,1935,3951,3788,4430,2909,3203, 282,2723, 640,  # 5478
-1372,3448,1127, 922, 325,3344,7627,7628, 711,2044,7629,7630,3952,2219,2787,1936,  # 5494
-3953,3345,2220,2251,3789,2300,7631,4431,3790,1258,3279,3954,3204,2138,2950,3955,  # 5510
-3956,7632,2221, 258,3205,4432, 101,1227,7633,3280,1755,7634,1391,3281,7635,2910,  # 5526
-2056, 893,7636,7637,7638,1402,4161,2342,7639,7640,3206,3556,7641,7642, 878,1325,  # 5542
-1780,2788,4433, 259,1385,2577, 744,1183,2267,4434,7643,3957,2502,7644, 684,1024,  # 5558
-4162,7645, 472,3557,3449,1165,3282,3958,3959, 322,2152, 881, 455,1695,1152,1340,  # 5574
- 660, 554,2153,4435,1058,4436,4163, 830,1065,3346,3960,4437,1923,7646,1703,1918,  # 5590
-7647, 932,2268, 122,7648,4438, 947, 677,7649,3791,2627, 297,1905,1924,2269,4439,  # 5606
-2317,3283,7650,7651,4164,7652,4165,  84,4166, 112, 989,7653, 547,1059,3961, 701,  # 5622
-3558,1019,7654,4167,7655,3450, 942, 639, 457,2301,2451, 993,2951, 407, 851, 494,  # 5638
-4440,3347, 927,7656,1237,7657,2421,3348, 573,4168, 680, 921,2911,1279,1874, 285,  # 5654
- 790,1448,1983, 719,2167,7658,7659,4441,3962,3963,1649,7660,1541, 563,7661,1077,  # 5670
-7662,3349,3041,3451, 511,2997,3964,3965,3667,3966,1268,2564,3350,3207,4442,4443,  # 5686
-7663, 535,1048,1276,1189,2912,2028,3142,1438,1373,2834,2952,1134,2012,7664,4169,  # 5702
-1238,2578,3086,1259,7665, 700,7666,2953,3143,3668,4170,7667,4171,1146,1875,1906,  # 5718
-4444,2601,3967, 781,2422, 132,1589, 203, 147, 273,2789,2402, 898,1786,2154,3968,  # 5734
-3969,7668,3792,2790,7669,7670,4445,4446,7671,3208,7672,1635,3793, 965,7673,1804,  # 5750
-2690,1516,3559,1121,1082,1329,3284,3970,1449,3794,  65,1128,2835,2913,2759,1590,  # 5766
-3795,7674,7675,  12,2658,  45, 976,2579,3144,4447, 517,2528,1013,1037,3209,7676,  # 5782
-3796,2836,7677,3797,7678,3452,7679,2602, 614,1998,2318,3798,3087,2724,2628,7680,  # 5798
-2580,4172, 599,1269,7681,1810,3669,7682,2691,3088, 759,1060, 489,1805,3351,3285,  # 5814
-1358,7683,7684,2386,1387,1215,2629,2252, 490,7685,7686,4173,1759,2387,2343,7687,  # 5830
-4448,3799,1907,3971,2630,1806,3210,4449,3453,3286,2760,2344, 874,7688,7689,3454,  # 5846
-3670,1858,  91,2914,3671,3042,3800,4450,7690,3145,3972,2659,7691,3455,1202,1403,  # 5862
-3801,2954,2529,1517,2503,4451,3456,2504,7692,4452,7693,2692,1885,1495,1731,3973,  # 5878
-2365,4453,7694,2029,7695,7696,3974,2693,1216, 237,2581,4174,2319,3975,3802,4454,  # 5894
-4455,2694,3560,3457, 445,4456,7697,7698,7699,7700,2761,  61,3976,3672,1822,3977,  # 5910
-7701, 687,2045, 935, 925, 405,2660, 703,1096,1859,2725,4457,3978,1876,1367,2695,  # 5926
-3352, 918,2105,1781,2476, 334,3287,1611,1093,4458, 564,3146,3458,3673,3353, 945,  # 5942
-2631,2057,4459,7702,1925, 872,4175,7703,3459,2696,3089, 349,4176,3674,3979,4460,  # 5958
-3803,4177,3675,2155,3980,4461,4462,4178,4463,2403,2046, 782,3981, 400, 251,4179,  # 5974
-1624,7704,7705, 277,3676, 299,1265, 476,1191,3804,2121,4180,4181,1109, 205,7706,  # 5990
-2582,1000,2156,3561,1860,7707,7708,7709,4464,7710,4465,2565, 107,2477,2157,3982,  # 6006
-3460,3147,7711,1533, 541,1301, 158, 753,4182,2872,3562,7712,1696, 370,1088,4183,  # 6022
-4466,3563, 579, 327, 440, 162,2240, 269,1937,1374,3461, 968,3043,  56,1396,3090,  # 6038
-2106,3288,3354,7713,1926,2158,4467,2998,7714,3564,7715,7716,3677,4468,2478,7717,  # 6054
-2791,7718,1650,4469,7719,2603,7720,7721,3983,2661,3355,1149,3356,3984,3805,3985,  # 6070
-7722,1076,  49,7723, 951,3211,3289,3290, 450,2837, 920,7724,1811,2792,2366,4184,  # 6086
-1908,1138,2367,3806,3462,7725,3212,4470,1909,1147,1518,2423,4471,3807,7726,4472,  # 6102
-2388,2604, 260,1795,3213,7727,7728,3808,3291, 708,7729,3565,1704,7730,3566,1351,  # 6118
-1618,3357,2999,1886, 944,4185,3358,4186,3044,3359,4187,7731,3678, 422, 413,1714,  # 6134
-3292, 500,2058,2345,4188,2479,7732,1344,1910, 954,7733,1668,7734,7735,3986,2404,  # 6150
-4189,3567,3809,4190,7736,2302,1318,2505,3091, 133,3092,2873,4473, 629,  31,2838,  # 6166
-2697,3810,4474, 850, 949,4475,3987,2955,1732,2088,4191,1496,1852,7737,3988, 620,  # 6182
-3214, 981,1242,3679,3360,1619,3680,1643,3293,2139,2452,1970,1719,3463,2168,7738,  # 6198
-3215,7739,7740,3361,1828,7741,1277,4476,1565,2047,7742,1636,3568,3093,7743, 869,  # 6214
-2839, 655,3811,3812,3094,3989,3000,3813,1310,3569,4477,7744,7745,7746,1733, 558,  # 6230
-4478,3681, 335,1549,3045,1756,4192,3682,1945,3464,1829,1291,1192, 470,2726,2107,  # 6246
-2793, 913,1054,3990,7747,1027,7748,3046,3991,4479, 982,2662,3362,3148,3465,3216,  # 6262
-3217,1946,2794,7749, 571,4480,7750,1830,7751,3570,2583,1523,2424,7752,2089, 984,  # 6278
-4481,3683,1959,7753,3684, 852, 923,2795,3466,3685, 969,1519, 999,2048,2320,1705,  # 6294
-7754,3095, 615,1662, 151, 597,3992,2405,2321,1049, 275,4482,3686,4193, 568,3687,  # 6310
-3571,2480,4194,3688,7755,2425,2270, 409,3218,7756,1566,2874,3467,1002, 769,2840,  # 6326
- 194,2090,3149,3689,2222,3294,4195, 628,1505,7757,7758,1763,2177,3001,3993, 521,  # 6342
-1161,2584,1787,2203,2406,4483,3994,1625,4196,4197, 412,  42,3096, 464,7759,2632,  # 6358
-4484,3363,1760,1571,2875,3468,2530,1219,2204,3814,2633,2140,2368,4485,4486,3295,  # 6374
-1651,3364,3572,7760,7761,3573,2481,3469,7762,3690,7763,7764,2271,2091, 460,7765,  # 6390
-4487,7766,3002, 962, 588,3574, 289,3219,2634,1116,  52,7767,3047,1796,7768,7769,  # 6406
-7770,1467,7771,1598,1143,3691,4198,1984,1734,1067,4488,1280,3365, 465,4489,1572,  # 6422
- 510,7772,1927,2241,1812,1644,3575,7773,4490,3692,7774,7775,2663,1573,1534,7776,  # 6438
-7777,4199, 536,1807,1761,3470,3815,3150,2635,7778,7779,7780,4491,3471,2915,1911,  # 6454
-2796,7781,3296,1122, 377,3220,7782, 360,7783,7784,4200,1529, 551,7785,2059,3693,  # 6470
-1769,2426,7786,2916,4201,3297,3097,2322,2108,2030,4492,1404, 136,1468,1479, 672,  # 6486
-1171,3221,2303, 271,3151,7787,2762,7788,2049, 678,2727, 865,1947,4493,7789,2013,  # 6502
-3995,2956,7790,2728,2223,1397,3048,3694,4494,4495,1735,2917,3366,3576,7791,3816,  # 6518
- 509,2841,2453,2876,3817,7792,7793,3152,3153,4496,4202,2531,4497,2304,1166,1010,  # 6534
- 552, 681,1887,7794,7795,2957,2958,3996,1287,1596,1861,3154, 358, 453, 736, 175,  # 6550
- 478,1117, 905,1167,1097,7796,1853,1530,7797,1706,7798,2178,3472,2287,3695,3473,  # 6566
-3577,4203,2092,4204,7799,3367,1193,2482,4205,1458,2190,2205,1862,1888,1421,3298,  # 6582
-2918,3049,2179,3474, 595,2122,7800,3997,7801,7802,4206,1707,2636, 223,3696,1359,  # 6598
- 751,3098, 183,3475,7803,2797,3003, 419,2369, 633, 704,3818,2389, 241,7804,7805,  # 6614
-7806, 838,3004,3697,2272,2763,2454,3819,1938,2050,3998,1309,3099,2242,1181,7807,  # 6630
-1136,2206,3820,2370,1446,4207,2305,4498,7808,7809,4208,1055,2605, 484,3698,7810,  # 6646
-3999, 625,4209,2273,3368,1499,4210,4000,7811,4001,4211,3222,2274,2275,3476,7812,  # 6662
-7813,2764, 808,2606,3699,3369,4002,4212,3100,2532, 526,3370,3821,4213, 955,7814,  # 6678
-1620,4214,2637,2427,7815,1429,3700,1669,1831, 994, 928,7816,3578,1260,7817,7818,  # 6694
-7819,1948,2288, 741,2919,1626,4215,2729,2455, 867,1184, 362,3371,1392,7820,7821,  # 6710
-4003,4216,1770,1736,3223,2920,4499,4500,1928,2698,1459,1158,7822,3050,3372,2877,  # 6726
-1292,1929,2506,2842,3701,1985,1187,2071,2014,2607,4217,7823,2566,2507,2169,3702,  # 6742
-2483,3299,7824,3703,4501,7825,7826, 666,1003,3005,1022,3579,4218,7827,4502,1813,  # 6758
-2253, 574,3822,1603, 295,1535, 705,3823,4219, 283, 858, 417,7828,7829,3224,4503,  # 6774
-4504,3051,1220,1889,1046,2276,2456,4004,1393,1599, 689,2567, 388,4220,7830,2484,  # 6790
- 802,7831,2798,3824,2060,1405,2254,7832,4505,3825,2109,1052,1345,3225,1585,7833,  # 6806
- 809,7834,7835,7836, 575,2730,3477, 956,1552,1469,1144,2323,7837,2324,1560,2457,  # 6822
-3580,3226,4005, 616,2207,3155,2180,2289,7838,1832,7839,3478,4506,7840,1319,3704,  # 6838
-3705,1211,3581,1023,3227,1293,2799,7841,7842,7843,3826, 607,2306,3827, 762,2878,  # 6854
-1439,4221,1360,7844,1485,3052,7845,4507,1038,4222,1450,2061,2638,4223,1379,4508,  # 6870
-2585,7846,7847,4224,1352,1414,2325,2921,1172,7848,7849,3828,3829,7850,1797,1451,  # 6886
-7851,7852,7853,7854,2922,4006,4007,2485,2346, 411,4008,4009,3582,3300,3101,4509,  # 6902
-1561,2664,1452,4010,1375,7855,7856,  47,2959, 316,7857,1406,1591,2923,3156,7858,  # 6918
-1025,2141,3102,3157, 354,2731, 884,2224,4225,2407, 508,3706, 726,3583, 996,2428,  # 6934
-3584, 729,7859, 392,2191,1453,4011,4510,3707,7860,7861,2458,3585,2608,1675,2800,  # 6950
- 919,2347,2960,2348,1270,4511,4012,  73,7862,7863, 647,7864,3228,2843,2255,1550,  # 6966
-1346,3006,7865,1332, 883,3479,7866,7867,7868,7869,3301,2765,7870,1212, 831,1347,  # 6982
-4226,4512,2326,3830,1863,3053, 720,3831,4513,4514,3832,7871,4227,7872,7873,4515,  # 6998
-7874,7875,1798,4516,3708,2609,4517,3586,1645,2371,7876,7877,2924, 669,2208,2665,  # 7014
-2429,7878,2879,7879,7880,1028,3229,7881,4228,2408,7882,2256,1353,7883,7884,4518,  # 7030
-3158, 518,7885,4013,7886,4229,1960,7887,2142,4230,7888,7889,3007,2349,2350,3833,  # 7046
- 516,1833,1454,4014,2699,4231,4519,2225,2610,1971,1129,3587,7890,2766,7891,2961,  # 7062
-1422, 577,1470,3008,1524,3373,7892,7893, 432,4232,3054,3480,7894,2586,1455,2508,  # 7078
-2226,1972,1175,7895,1020,2732,4015,3481,4520,7896,2733,7897,1743,1361,3055,3482,  # 7094
-2639,4016,4233,4521,2290, 895, 924,4234,2170, 331,2243,3056, 166,1627,3057,1098,  # 7110
-7898,1232,2880,2227,3374,4522, 657, 403,1196,2372, 542,3709,3375,1600,4235,3483,  # 7126
-7899,4523,2767,3230, 576, 530,1362,7900,4524,2533,2666,3710,4017,7901, 842,3834,  # 7142
-7902,2801,2031,1014,4018, 213,2700,3376, 665, 621,4236,7903,3711,2925,2430,7904,  # 7158
-2431,3302,3588,3377,7905,4237,2534,4238,4525,3589,1682,4239,3484,1380,7906, 724,  # 7174
-2277, 600,1670,7907,1337,1233,4526,3103,2244,7908,1621,4527,7909, 651,4240,7910,  # 7190
-1612,4241,2611,7911,2844,7912,2734,2307,3058,7913, 716,2459,3059, 174,1255,2701,  # 7206
-4019,3590, 548,1320,1398, 728,4020,1574,7914,1890,1197,3060,4021,7915,3061,3062,  # 7222
-3712,3591,3713, 747,7916, 635,4242,4528,7917,7918,7919,4243,7920,7921,4529,7922,  # 7238
-3378,4530,2432, 451,7923,3714,2535,2072,4244,2735,4245,4022,7924,1764,4531,7925,  # 7254
-4246, 350,7926,2278,2390,2486,7927,4247,4023,2245,1434,4024, 488,4532, 458,4248,  # 7270
-4025,3715, 771,1330,2391,3835,2568,3159,2159,2409,1553,2667,3160,4249,7928,2487,  # 7286
-2881,2612,1720,2702,4250,3379,4533,7929,2536,4251,7930,3231,4252,2768,7931,2015,  # 7302
-2736,7932,1155,1017,3716,3836,7933,3303,2308, 201,1864,4253,1430,7934,4026,7935,  # 7318
-7936,7937,7938,7939,4254,1604,7940, 414,1865, 371,2587,4534,4535,3485,2016,3104,  # 7334
-4536,1708, 960,4255, 887, 389,2171,1536,1663,1721,7941,2228,4027,2351,2926,1580,  # 7350
-7942,7943,7944,1744,7945,2537,4537,4538,7946,4539,7947,2073,7948,7949,3592,3380,  # 7366
-2882,4256,7950,4257,2640,3381,2802, 673,2703,2460, 709,3486,4028,3593,4258,7951,  # 7382
-1148, 502, 634,7952,7953,1204,4540,3594,1575,4541,2613,3717,7954,3718,3105, 948,  # 7398
-3232, 121,1745,3837,1110,7955,4259,3063,2509,3009,4029,3719,1151,1771,3838,1488,  # 7414
-4030,1986,7956,2433,3487,7957,7958,2093,7959,4260,3839,1213,1407,2803, 531,2737,  # 7430
-2538,3233,1011,1537,7960,2769,4261,3106,1061,7961,3720,3721,1866,2883,7962,2017,  # 7446
- 120,4262,4263,2062,3595,3234,2309,3840,2668,3382,1954,4542,7963,7964,3488,1047,  # 7462
-2704,1266,7965,1368,4543,2845, 649,3383,3841,2539,2738,1102,2846,2669,7966,7967,  # 7478
-1999,7968,1111,3596,2962,7969,2488,3842,3597,2804,1854,3384,3722,7970,7971,3385,  # 7494
-2410,2884,3304,3235,3598,7972,2569,7973,3599,2805,4031,1460, 856,7974,3600,7975,  # 7510
-2885,2963,7976,2886,3843,7977,4264, 632,2510, 875,3844,1697,3845,2291,7978,7979,  # 7526
-4544,3010,1239, 580,4545,4265,7980, 914, 936,2074,1190,4032,1039,2123,7981,7982,  # 7542
-7983,3386,1473,7984,1354,4266,3846,7985,2172,3064,4033, 915,3305,4267,4268,3306,  # 7558
-1605,1834,7986,2739, 398,3601,4269,3847,4034, 328,1912,2847,4035,3848,1331,4270,  # 7574
-3011, 937,4271,7987,3602,4036,4037,3387,2160,4546,3388, 524, 742, 538,3065,1012,  # 7590
-7988,7989,3849,2461,7990, 658,1103, 225,3850,7991,7992,4547,7993,4548,7994,3236,  # 7606
-1243,7995,4038, 963,2246,4549,7996,2705,3603,3161,7997,7998,2588,2327,7999,4550,  # 7622
-8000,8001,8002,3489,3307, 957,3389,2540,2032,1930,2927,2462, 870,2018,3604,1746,  # 7638
-2770,2771,2434,2463,8003,3851,8004,3723,3107,3724,3490,3390,3725,8005,1179,3066,  # 7654
-8006,3162,2373,4272,3726,2541,3163,3108,2740,4039,8007,3391,1556,2542,2292, 977,  # 7670
-2887,2033,4040,1205,3392,8008,1765,3393,3164,2124,1271,1689, 714,4551,3491,8009,  # 7686
-2328,3852, 533,4273,3605,2181, 617,8010,2464,3308,3492,2310,8011,8012,3165,8013,  # 7702
-8014,3853,1987, 618, 427,2641,3493,3394,8015,8016,1244,1690,8017,2806,4274,4552,  # 7718
-8018,3494,8019,8020,2279,1576, 473,3606,4275,3395, 972,8021,3607,8022,3067,8023,  # 7734
-8024,4553,4554,8025,3727,4041,4042,8026, 153,4555, 356,8027,1891,2888,4276,2143,  # 7750
- 408, 803,2352,8028,3854,8029,4277,1646,2570,2511,4556,4557,3855,8030,3856,4278,  # 7766
-8031,2411,3396, 752,8032,8033,1961,2964,8034, 746,3012,2465,8035,4279,3728, 698,  # 7782
-4558,1892,4280,3608,2543,4559,3609,3857,8036,3166,3397,8037,1823,1302,4043,2706,  # 7798
-3858,1973,4281,8038,4282,3167, 823,1303,1288,1236,2848,3495,4044,3398, 774,3859,  # 7814
-8039,1581,4560,1304,2849,3860,4561,8040,2435,2161,1083,3237,4283,4045,4284, 344,  # 7830
-1173, 288,2311, 454,1683,8041,8042,1461,4562,4046,2589,8043,8044,4563, 985, 894,  # 7846
-8045,3399,3168,8046,1913,2928,3729,1988,8047,2110,1974,8048,4047,8049,2571,1194,  # 7862
- 425,8050,4564,3169,1245,3730,4285,8051,8052,2850,8053, 636,4565,1855,3861, 760,  # 7878
-1799,8054,4286,2209,1508,4566,4048,1893,1684,2293,8055,8056,8057,4287,4288,2210,  # 7894
- 479,8058,8059, 832,8060,4049,2489,8061,2965,2490,3731, 990,3109, 627,1814,2642,  # 7910
-4289,1582,4290,2125,2111,3496,4567,8062, 799,4291,3170,8063,4568,2112,1737,3013,  # 7926
-1018, 543, 754,4292,3309,1676,4569,4570,4050,8064,1489,8065,3497,8066,2614,2889,  # 7942
-4051,8067,8068,2966,8069,8070,8071,8072,3171,4571,4572,2182,1722,8073,3238,3239,  # 7958
-1842,3610,1715, 481, 365,1975,1856,8074,8075,1962,2491,4573,8076,2126,3611,3240,  # 7974
- 433,1894,2063,2075,8077, 602,2741,8078,8079,8080,8081,8082,3014,1628,3400,8083,  # 7990
-3172,4574,4052,2890,4575,2512,8084,2544,2772,8085,8086,8087,3310,4576,2891,8088,  # 8006
-4577,8089,2851,4578,4579,1221,2967,4053,2513,8090,8091,8092,1867,1989,8093,8094,  # 8022
-8095,1895,8096,8097,4580,1896,4054, 318,8098,2094,4055,4293,8099,8100, 485,8101,  # 8038
- 938,3862, 553,2670, 116,8102,3863,3612,8103,3498,2671,2773,3401,3311,2807,8104,  # 8054
-3613,2929,4056,1747,2930,2968,8105,8106, 207,8107,8108,2672,4581,2514,8109,3015,  # 8070
- 890,3614,3864,8110,1877,3732,3402,8111,2183,2353,3403,1652,8112,8113,8114, 941,  # 8086
-2294, 208,3499,4057,2019, 330,4294,3865,2892,2492,3733,4295,8115,8116,8117,8118,  # 8102
-)
-
diff --git a/venv/lib/python3.7/site-packages/chardet/euctwprober.py b/venv/lib/python3.7/site-packages/chardet/euctwprober.py
deleted file mode 100644
index 35669cc..0000000
--- a/venv/lib/python3.7/site-packages/chardet/euctwprober.py
+++ /dev/null
@@ -1,46 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is mozilla.org code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .mbcharsetprober import MultiByteCharSetProber
-from .codingstatemachine import CodingStateMachine
-from .chardistribution import EUCTWDistributionAnalysis
-from .mbcssm import EUCTW_SM_MODEL
-
-class EUCTWProber(MultiByteCharSetProber):
-    def __init__(self):
-        super(EUCTWProber, self).__init__()
-        self.coding_sm = CodingStateMachine(EUCTW_SM_MODEL)
-        self.distribution_analyzer = EUCTWDistributionAnalysis()
-        self.reset()
-
-    @property
-    def charset_name(self):
-        return "EUC-TW"
-
-    @property
-    def language(self):
-        return "Taiwan"
diff --git a/venv/lib/python3.7/site-packages/chardet/gb2312freq.py b/venv/lib/python3.7/site-packages/chardet/gb2312freq.py
deleted file mode 100644
index 697837b..0000000
--- a/venv/lib/python3.7/site-packages/chardet/gb2312freq.py
+++ /dev/null
@@ -1,283 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-# GB2312 most frequently used character table
-#
-# Char to FreqOrder table , from hz6763
-
-# 512  --> 0.79  -- 0.79
-# 1024 --> 0.92  -- 0.13
-# 2048 --> 0.98  -- 0.06
-# 6768 --> 1.00  -- 0.02
-#
-# Ideal Distribution Ratio = 0.79135/(1-0.79135) = 3.79
-# Random Distribution Ration = 512 / (3755 - 512) = 0.157
-#
-# Typical Distribution Ratio about 25% of Ideal one, still much higher that RDR
-
-GB2312_TYPICAL_DISTRIBUTION_RATIO = 0.9
-
-GB2312_TABLE_SIZE = 3760
-
-GB2312_CHAR_TO_FREQ_ORDER = (
-1671, 749,1443,2364,3924,3807,2330,3921,1704,3463,2691,1511,1515, 572,3191,2205,
-2361, 224,2558, 479,1711, 963,3162, 440,4060,1905,2966,2947,3580,2647,3961,3842,
-2204, 869,4207, 970,2678,5626,2944,2956,1479,4048, 514,3595, 588,1346,2820,3409,
- 249,4088,1746,1873,2047,1774, 581,1813, 358,1174,3590,1014,1561,4844,2245, 670,
-1636,3112, 889,1286, 953, 556,2327,3060,1290,3141, 613, 185,3477,1367, 850,3820,
-1715,2428,2642,2303,2732,3041,2562,2648,3566,3946,1349, 388,3098,2091,1360,3585,
- 152,1687,1539, 738,1559,  59,1232,2925,2267,1388,1249,1741,1679,2960, 151,1566,
-1125,1352,4271, 924,4296, 385,3166,4459, 310,1245,2850,  70,3285,2729,3534,3575,
-2398,3298,3466,1960,2265, 217,3647, 864,1909,2084,4401,2773,1010,3269,5152, 853,
-3051,3121,1244,4251,1895, 364,1499,1540,2313,1180,3655,2268, 562, 715,2417,3061,
- 544, 336,3768,2380,1752,4075, 950, 280,2425,4382, 183,2759,3272, 333,4297,2155,
-1688,2356,1444,1039,4540, 736,1177,3349,2443,2368,2144,2225, 565, 196,1482,3406,
- 927,1335,4147, 692, 878,1311,1653,3911,3622,1378,4200,1840,2969,3149,2126,1816,
-2534,1546,2393,2760, 737,2494,  13, 447, 245,2747,  38,2765,2129,2589,1079, 606,
- 360, 471,3755,2890, 404, 848, 699,1785,1236, 370,2221,1023,3746,2074,2026,2023,
-2388,1581,2119, 812,1141,3091,2536,1519, 804,2053, 406,1596,1090, 784, 548,4414,
-1806,2264,2936,1100, 343,4114,5096, 622,3358, 743,3668,1510,1626,5020,3567,2513,
-3195,4115,5627,2489,2991,  24,2065,2697,1087,2719,  48,1634, 315,  68, 985,2052,
- 198,2239,1347,1107,1439, 597,2366,2172, 871,3307, 919,2487,2790,1867, 236,2570,
-1413,3794, 906,3365,3381,1701,1982,1818,1524,2924,1205, 616,2586,2072,2004, 575,
- 253,3099,  32,1365,1182, 197,1714,2454,1201, 554,3388,3224,2748, 756,2587, 250,
-2567,1507,1517,3529,1922,2761,2337,3416,1961,1677,2452,2238,3153, 615, 911,1506,
-1474,2495,1265,1906,2749,3756,3280,2161, 898,2714,1759,3450,2243,2444, 563,  26,
-3286,2266,3769,3344,2707,3677, 611,1402, 531,1028,2871,4548,1375, 261,2948, 835,
-1190,4134, 353, 840,2684,1900,3082,1435,2109,1207,1674, 329,1872,2781,4055,2686,
-2104, 608,3318,2423,2957,2768,1108,3739,3512,3271,3985,2203,1771,3520,1418,2054,
-1681,1153, 225,1627,2929, 162,2050,2511,3687,1954, 124,1859,2431,1684,3032,2894,
- 585,4805,3969,2869,2704,2088,2032,2095,3656,2635,4362,2209, 256, 518,2042,2105,
-3777,3657, 643,2298,1148,1779, 190, 989,3544, 414,  11,2135,2063,2979,1471, 403,
-3678, 126, 770,1563, 671,2499,3216,2877, 600,1179, 307,2805,4937,1268,1297,2694,
- 252,4032,1448,1494,1331,1394, 127,2256, 222,1647,1035,1481,3056,1915,1048, 873,
-3651, 210,  33,1608,2516, 200,1520, 415, 102,   0,3389,1287, 817,  91,3299,2940,
- 836,1814, 549,2197,1396,1669,2987,3582,2297,2848,4528,1070, 687,  20,1819, 121,
-1552,1364,1461,1968,2617,3540,2824,2083, 177, 948,4938,2291, 110,4549,2066, 648,
-3359,1755,2110,2114,4642,4845,1693,3937,3308,1257,1869,2123, 208,1804,3159,2992,
-2531,2549,3361,2418,1350,2347,2800,2568,1291,2036,2680,  72, 842,1990, 212,1233,
-1154,1586,  75,2027,3410,4900,1823,1337,2710,2676, 728,2810,1522,3026,4995, 157,
- 755,1050,4022, 710, 785,1936,2194,2085,1406,2777,2400, 150,1250,4049,1206, 807,
-1910, 534, 529,3309,1721,1660, 274,  39,2827, 661,2670,1578, 925,3248,3815,1094,
-4278,4901,4252,  41,1150,3747,2572,2227,4501,3658,4902,3813,3357,3617,2884,2258,
- 887, 538,4187,3199,1294,2439,3042,2329,2343,2497,1255, 107, 543,1527, 521,3478,
-3568, 194,5062,  15, 961,3870,1241,1192,2664,  66,5215,3260,2111,1295,1127,2152,
-3805,4135, 901,1164,1976, 398,1278, 530,1460, 748, 904,1054,1966,1426,  53,2909,
- 509, 523,2279,1534, 536,1019, 239,1685, 460,2353, 673,1065,2401,3600,4298,2272,
-1272,2363, 284,1753,3679,4064,1695,  81, 815,2677,2757,2731,1386, 859, 500,4221,
-2190,2566, 757,1006,2519,2068,1166,1455, 337,2654,3203,1863,1682,1914,3025,1252,
-1409,1366, 847, 714,2834,2038,3209, 964,2970,1901, 885,2553,1078,1756,3049, 301,
-1572,3326, 688,2130,1996,2429,1805,1648,2930,3421,2750,3652,3088, 262,1158,1254,
- 389,1641,1812, 526,1719, 923,2073,1073,1902, 468, 489,4625,1140, 857,2375,3070,
-3319,2863, 380, 116,1328,2693,1161,2244, 273,1212,1884,2769,3011,1775,1142, 461,
-3066,1200,2147,2212, 790, 702,2695,4222,1601,1058, 434,2338,5153,3640,  67,2360,
-4099,2502, 618,3472,1329, 416,1132, 830,2782,1807,2653,3211,3510,1662, 192,2124,
- 296,3979,1739,1611,3684,  23, 118, 324, 446,1239,1225, 293,2520,3814,3795,2535,
-3116,  17,1074, 467,2692,2201, 387,2922,  45,1326,3055,1645,3659,2817, 958, 243,
-1903,2320,1339,2825,1784,3289, 356, 576, 865,2315,2381,3377,3916,1088,3122,1713,
-1655, 935, 628,4689,1034,1327, 441, 800, 720, 894,1979,2183,1528,5289,2702,1071,
-4046,3572,2399,1571,3281,  79, 761,1103, 327, 134, 758,1899,1371,1615, 879, 442,
- 215,2605,2579, 173,2048,2485,1057,2975,3317,1097,2253,3801,4263,1403,1650,2946,
- 814,4968,3487,1548,2644,1567,1285,   2, 295,2636,  97, 946,3576, 832, 141,4257,
-3273, 760,3821,3521,3156,2607, 949,1024,1733,1516,1803,1920,2125,2283,2665,3180,
-1501,2064,3560,2171,1592, 803,3518,1416, 732,3897,4258,1363,1362,2458, 119,1427,
- 602,1525,2608,1605,1639,3175, 694,3064,  10, 465,  76,2000,4846,4208, 444,3781,
-1619,3353,2206,1273,3796, 740,2483, 320,1723,2377,3660,2619,1359,1137,1762,1724,
-2345,2842,1850,1862, 912, 821,1866, 612,2625,1735,2573,3369,1093, 844,  89, 937,
- 930,1424,3564,2413,2972,1004,3046,3019,2011, 711,3171,1452,4178, 428, 801,1943,
- 432, 445,2811, 206,4136,1472, 730, 349,  73, 397,2802,2547, 998,1637,1167, 789,
- 396,3217, 154,1218, 716,1120,1780,2819,4826,1931,3334,3762,2139,1215,2627, 552,
-3664,3628,3232,1405,2383,3111,1356,2652,3577,3320,3101,1703, 640,1045,1370,1246,
-4996, 371,1575,2436,1621,2210, 984,4033,1734,2638,  16,4529, 663,2755,3255,1451,
-3917,2257,1253,1955,2234,1263,2951, 214,1229, 617, 485, 359,1831,1969, 473,2310,
- 750,2058, 165,  80,2864,2419, 361,4344,2416,2479,1134, 796,3726,1266,2943, 860,
-2715, 938, 390,2734,1313,1384, 248, 202, 877,1064,2854, 522,3907, 279,1602, 297,
-2357, 395,3740, 137,2075, 944,4089,2584,1267,3802,  62,1533,2285, 178, 176, 780,
-2440, 201,3707, 590, 478,1560,4354,2117,1075,  30,  74,4643,4004,1635,1441,2745,
- 776,2596, 238,1077,1692,1912,2844, 605, 499,1742,3947, 241,3053, 980,1749, 936,
-2640,4511,2582, 515,1543,2162,5322,2892,2993, 890,2148,1924, 665,1827,3581,1032,
- 968,3163, 339,1044,1896, 270, 583,1791,1720,4367,1194,3488,3669,  43,2523,1657,
- 163,2167, 290,1209,1622,3378, 550, 634,2508,2510, 695,2634,2384,2512,1476,1414,
- 220,1469,2341,2138,2852,3183,2900,4939,2865,3502,1211,3680, 854,3227,1299,2976,
-3172, 186,2998,1459, 443,1067,3251,1495, 321,1932,3054, 909, 753,1410,1828, 436,
-2441,1119,1587,3164,2186,1258, 227, 231,1425,1890,3200,3942, 247, 959, 725,5254,
-2741, 577,2158,2079, 929, 120, 174, 838,2813, 591,1115, 417,2024,  40,3240,1536,
-1037, 291,4151,2354, 632,1298,2406,2500,3535,1825,1846,3451, 205,1171, 345,4238,
-  18,1163, 811, 685,2208,1217, 425,1312,1508,1175,4308,2552,1033, 587,1381,3059,
-2984,3482, 340,1316,4023,3972, 792,3176, 519, 777,4690, 918, 933,4130,2981,3741,
-  90,3360,2911,2200,5184,4550, 609,3079,2030, 272,3379,2736, 363,3881,1130,1447,
- 286, 779, 357,1169,3350,3137,1630,1220,2687,2391, 747,1277,3688,2618,2682,2601,
-1156,3196,5290,4034,3102,1689,3596,3128, 874, 219,2783, 798, 508,1843,2461, 269,
-1658,1776,1392,1913,2983,3287,2866,2159,2372, 829,4076,  46,4253,2873,1889,1894,
- 915,1834,1631,2181,2318, 298, 664,2818,3555,2735, 954,3228,3117, 527,3511,2173,
- 681,2712,3033,2247,2346,3467,1652, 155,2164,3382, 113,1994, 450, 899, 494, 994,
-1237,2958,1875,2336,1926,3727, 545,1577,1550, 633,3473, 204,1305,3072,2410,1956,
-2471, 707,2134, 841,2195,2196,2663,3843,1026,4940, 990,3252,4997, 368,1092, 437,
-3212,3258,1933,1829, 675,2977,2893, 412, 943,3723,4644,3294,3283,2230,2373,5154,
-2389,2241,2661,2323,1404,2524, 593, 787, 677,3008,1275,2059, 438,2709,2609,2240,
-2269,2246,1446,  36,1568,1373,3892,1574,2301,1456,3962, 693,2276,5216,2035,1143,
-2720,1919,1797,1811,2763,4137,2597,1830,1699,1488,1198,2090, 424,1694, 312,3634,
-3390,4179,3335,2252,1214, 561,1059,3243,2295,2561, 975,5155,2321,2751,3772, 472,
-1537,3282,3398,1047,2077,2348,2878,1323,3340,3076, 690,2906,  51, 369, 170,3541,
-1060,2187,2688,3670,2541,1083,1683, 928,3918, 459, 109,4427, 599,3744,4286, 143,
-2101,2730,2490,  82,1588,3036,2121, 281,1860, 477,4035,1238,2812,3020,2716,3312,
-1530,2188,2055,1317, 843, 636,1808,1173,3495, 649, 181,1002, 147,3641,1159,2414,
-3750,2289,2795, 813,3123,2610,1136,4368,   5,3391,4541,2174, 420, 429,1728, 754,
-1228,2115,2219, 347,2223,2733, 735,1518,3003,2355,3134,1764,3948,3329,1888,2424,
-1001,1234,1972,3321,3363,1672,1021,1450,1584, 226, 765, 655,2526,3404,3244,2302,
-3665, 731, 594,2184, 319,1576, 621, 658,2656,4299,2099,3864,1279,2071,2598,2739,
- 795,3086,3699,3908,1707,2352,2402,1382,3136,2475,1465,4847,3496,3865,1085,3004,
-2591,1084, 213,2287,1963,3565,2250, 822, 793,4574,3187,1772,1789,3050, 595,1484,
-1959,2770,1080,2650, 456, 422,2996, 940,3322,4328,4345,3092,2742, 965,2784, 739,
-4124, 952,1358,2498,2949,2565, 332,2698,2378, 660,2260,2473,4194,3856,2919, 535,
-1260,2651,1208,1428,1300,1949,1303,2942, 433,2455,2450,1251,1946, 614,1269, 641,
-1306,1810,2737,3078,2912, 564,2365,1419,1415,1497,4460,2367,2185,1379,3005,1307,
-3218,2175,1897,3063, 682,1157,4040,4005,1712,1160,1941,1399, 394, 402,2952,1573,
-1151,2986,2404, 862, 299,2033,1489,3006, 346, 171,2886,3401,1726,2932, 168,2533,
-  47,2507,1030,3735,1145,3370,1395,1318,1579,3609,4560,2857,4116,1457,2529,1965,
- 504,1036,2690,2988,2405, 745,5871, 849,2397,2056,3081, 863,2359,3857,2096,  99,
-1397,1769,2300,4428,1643,3455,1978,1757,3718,1440,  35,4879,3742,1296,4228,2280,
- 160,5063,1599,2013, 166, 520,3479,1646,3345,3012, 490,1937,1545,1264,2182,2505,
-1096,1188,1369,1436,2421,1667,2792,2460,1270,2122, 727,3167,2143, 806,1706,1012,
-1800,3037, 960,2218,1882, 805, 139,2456,1139,1521, 851,1052,3093,3089, 342,2039,
- 744,5097,1468,1502,1585,2087, 223, 939, 326,2140,2577, 892,2481,1623,4077, 982,
-3708, 135,2131,  87,2503,3114,2326,1106, 876,1616, 547,2997,2831,2093,3441,4530,
-4314,   9,3256,4229,4148, 659,1462,1986,1710,2046,2913,2231,4090,4880,5255,3392,
-3274,1368,3689,4645,1477, 705,3384,3635,1068,1529,2941,1458,3782,1509, 100,1656,
-2548, 718,2339, 408,1590,2780,3548,1838,4117,3719,1345,3530, 717,3442,2778,3220,
-2898,1892,4590,3614,3371,2043,1998,1224,3483, 891, 635, 584,2559,3355, 733,1766,
-1729,1172,3789,1891,2307, 781,2982,2271,1957,1580,5773,2633,2005,4195,3097,1535,
-3213,1189,1934,5693,3262, 586,3118,1324,1598, 517,1564,2217,1868,1893,4445,3728,
-2703,3139,1526,1787,1992,3882,2875,1549,1199,1056,2224,1904,2711,5098,4287, 338,
-1993,3129,3489,2689,1809,2815,1997, 957,1855,3898,2550,3275,3057,1105,1319, 627,
-1505,1911,1883,3526, 698,3629,3456,1833,1431, 746,  77,1261,2017,2296,1977,1885,
- 125,1334,1600, 525,1798,1109,2222,1470,1945, 559,2236,1186,3443,2476,1929,1411,
-2411,3135,1777,3372,2621,1841,1613,3229, 668,1430,1839,2643,2916, 195,1989,2671,
-2358,1387, 629,3205,2293,5256,4439, 123,1310, 888,1879,4300,3021,3605,1003,1162,
-3192,2910,2010, 140,2395,2859,  55,1082,2012,2901, 662, 419,2081,1438, 680,2774,
-4654,3912,1620,1731,1625,5035,4065,2328, 512,1344, 802,5443,2163,2311,2537, 524,
-3399,  98,1155,2103,1918,2606,3925,2816,1393,2465,1504,3773,2177,3963,1478,4346,
- 180,1113,4655,3461,2028,1698, 833,2696,1235,1322,1594,4408,3623,3013,3225,2040,
-3022, 541,2881, 607,3632,2029,1665,1219, 639,1385,1686,1099,2803,3231,1938,3188,
-2858, 427, 676,2772,1168,2025, 454,3253,2486,3556, 230,1950, 580, 791,1991,1280,
-1086,1974,2034, 630, 257,3338,2788,4903,1017,  86,4790, 966,2789,1995,1696,1131,
- 259,3095,4188,1308, 179,1463,5257, 289,4107,1248,  42,3413,1725,2288, 896,1947,
- 774,4474,4254, 604,3430,4264, 392,2514,2588, 452, 237,1408,3018, 988,4531,1970,
-3034,3310, 540,2370,1562,1288,2990, 502,4765,1147,   4,1853,2708, 207, 294,2814,
-4078,2902,2509, 684,  34,3105,3532,2551, 644, 709,2801,2344, 573,1727,3573,3557,
-2021,1081,3100,4315,2100,3681, 199,2263,1837,2385, 146,3484,1195,2776,3949, 997,
-1939,3973,1008,1091,1202,1962,1847,1149,4209,5444,1076, 493, 117,5400,2521, 972,
-1490,2934,1796,4542,2374,1512,2933,2657, 413,2888,1135,2762,2314,2156,1355,2369,
- 766,2007,2527,2170,3124,2491,2593,2632,4757,2437, 234,3125,3591,1898,1750,1376,
-1942,3468,3138, 570,2127,2145,3276,4131, 962, 132,1445,4196,  19, 941,3624,3480,
-3366,1973,1374,4461,3431,2629, 283,2415,2275, 808,2887,3620,2112,2563,1353,3610,
- 955,1089,3103,1053,  96,  88,4097, 823,3808,1583, 399, 292,4091,3313, 421,1128,
- 642,4006, 903,2539,1877,2082, 596,  29,4066,1790, 722,2157, 130, 995,1569, 769,
-1485, 464, 513,2213, 288,1923,1101,2453,4316, 133, 486,2445,  50, 625, 487,2207,
-  57, 423, 481,2962, 159,3729,1558, 491, 303, 482, 501, 240,2837, 112,3648,2392,
-1783, 362,   8,3433,3422, 610,2793,3277,1390,1284,1654,  21,3823, 734, 367, 623,
- 193, 287, 374,1009,1483, 816, 476, 313,2255,2340,1262,2150,2899,1146,2581, 782,
-2116,1659,2018,1880, 255,3586,3314,1110,2867,2137,2564, 986,2767,5185,2006, 650,
- 158, 926, 762, 881,3157,2717,2362,3587, 306,3690,3245,1542,3077,2427,1691,2478,
-2118,2985,3490,2438, 539,2305, 983, 129,1754, 355,4201,2386, 827,2923, 104,1773,
-2838,2771, 411,2905,3919, 376, 767, 122,1114, 828,2422,1817,3506, 266,3460,1007,
-1609,4998, 945,2612,4429,2274, 726,1247,1964,2914,2199,2070,4002,4108, 657,3323,
-1422, 579, 455,2764,4737,1222,2895,1670, 824,1223,1487,2525, 558, 861,3080, 598,
-2659,2515,1967, 752,2583,2376,2214,4180, 977, 704,2464,4999,2622,4109,1210,2961,
- 819,1541, 142,2284,  44, 418, 457,1126,3730,4347,4626,1644,1876,3671,1864, 302,
-1063,5694, 624, 723,1984,3745,1314,1676,2488,1610,1449,3558,3569,2166,2098, 409,
-1011,2325,3704,2306, 818,1732,1383,1824,1844,3757, 999,2705,3497,1216,1423,2683,
-2426,2954,2501,2726,2229,1475,2554,5064,1971,1794,1666,2014,1343, 783, 724, 191,
-2434,1354,2220,5065,1763,2752,2472,4152, 131, 175,2885,3434,  92,1466,4920,2616,
-3871,3872,3866, 128,1551,1632, 669,1854,3682,4691,4125,1230, 188,2973,3290,1302,
-1213, 560,3266, 917, 763,3909,3249,1760, 868,1958, 764,1782,2097, 145,2277,3774,
-4462,  64,1491,3062, 971,2132,3606,2442, 221,1226,1617, 218, 323,1185,3207,3147,
- 571, 619,1473,1005,1744,2281, 449,1887,2396,3685, 275, 375,3816,1743,3844,3731,
- 845,1983,2350,4210,1377, 773, 967,3499,3052,3743,2725,4007,1697,1022,3943,1464,
-3264,2855,2722,1952,1029,2839,2467,  84,4383,2215, 820,1391,2015,2448,3672, 377,
-1948,2168, 797,2545,3536,2578,2645,  94,2874,1678, 405,1259,3071, 771, 546,1315,
- 470,1243,3083, 895,2468, 981, 969,2037, 846,4181, 653,1276,2928,  14,2594, 557,
-3007,2474, 156, 902,1338,1740,2574, 537,2518, 973,2282,2216,2433,1928, 138,2903,
-1293,2631,1612, 646,3457, 839,2935, 111, 496,2191,2847, 589,3186, 149,3994,2060,
-4031,2641,4067,3145,1870,  37,3597,2136,1025,2051,3009,3383,3549,1121,1016,3261,
-1301, 251,2446,2599,2153, 872,3246, 637, 334,3705, 831, 884, 921,3065,3140,4092,
-2198,1944, 246,2964, 108,2045,1152,1921,2308,1031, 203,3173,4170,1907,3890, 810,
-1401,2003,1690, 506, 647,1242,2828,1761,1649,3208,2249,1589,3709,2931,5156,1708,
- 498, 666,2613, 834,3817,1231, 184,2851,1124, 883,3197,2261,3710,1765,1553,2658,
-1178,2639,2351,  93,1193, 942,2538,2141,4402, 235,1821, 870,1591,2192,1709,1871,
-3341,1618,4126,2595,2334, 603, 651,  69, 701, 268,2662,3411,2555,1380,1606, 503,
- 448, 254,2371,2646, 574,1187,2309,1770, 322,2235,1292,1801, 305, 566,1133, 229,
-2067,2057, 706, 167, 483,2002,2672,3295,1820,3561,3067, 316, 378,2746,3452,1112,
- 136,1981, 507,1651,2917,1117, 285,4591, 182,2580,3522,1304, 335,3303,1835,2504,
-1795,1792,2248, 674,1018,2106,2449,1857,2292,2845, 976,3047,1781,2600,2727,1389,
-1281,  52,3152, 153, 265,3950, 672,3485,3951,4463, 430,1183, 365, 278,2169,  27,
-1407,1336,2304, 209,1340,1730,2202,1852,2403,2883, 979,1737,1062, 631,2829,2542,
-3876,2592, 825,2086,2226,3048,3625, 352,1417,3724, 542, 991, 431,1351,3938,1861,
-2294, 826,1361,2927,3142,3503,1738, 463,2462,2723, 582,1916,1595,2808, 400,3845,
-3891,2868,3621,2254,  58,2492,1123, 910,2160,2614,1372,1603,1196,1072,3385,1700,
-3267,1980, 696, 480,2430, 920, 799,1570,2920,1951,2041,4047,2540,1321,4223,2469,
-3562,2228,1271,2602, 401,2833,3351,2575,5157, 907,2312,1256, 410, 263,3507,1582,
- 996, 678,1849,2316,1480, 908,3545,2237, 703,2322, 667,1826,2849,1531,2604,2999,
-2407,3146,2151,2630,1786,3711, 469,3542, 497,3899,2409, 858, 837,4446,3393,1274,
- 786, 620,1845,2001,3311, 484, 308,3367,1204,1815,3691,2332,1532,2557,1842,2020,
-2724,1927,2333,4440, 567,  22,1673,2728,4475,1987,1858,1144,1597, 101,1832,3601,
-  12, 974,3783,4391, 951,1412,   1,3720, 453,4608,4041, 528,1041,1027,3230,2628,
-1129, 875,1051,3291,1203,2262,1069,2860,2799,2149,2615,3278, 144,1758,3040,  31,
- 475,1680, 366,2685,3184, 311,1642,4008,2466,5036,1593,1493,2809, 216,1420,1668,
- 233, 304,2128,3284, 232,1429,1768,1040,2008,3407,2740,2967,2543, 242,2133, 778,
-1565,2022,2620, 505,2189,2756,1098,2273, 372,1614, 708, 553,2846,2094,2278, 169,
-3626,2835,4161, 228,2674,3165, 809,1454,1309, 466,1705,1095, 900,3423, 880,2667,
-3751,5258,2317,3109,2571,4317,2766,1503,1342, 866,4447,1118,  63,2076, 314,1881,
-1348,1061, 172, 978,3515,1747, 532, 511,3970,   6, 601, 905,2699,3300,1751, 276,
-1467,3725,2668,  65,4239,2544,2779,2556,1604, 578,2451,1802, 992,2331,2624,1320,
-3446, 713,1513,1013, 103,2786,2447,1661, 886,1702, 916, 654,3574,2031,1556, 751,
-2178,2821,2179,1498,1538,2176, 271, 914,2251,2080,1325, 638,1953,2937,3877,2432,
-2754,  95,3265,1716, 260,1227,4083, 775, 106,1357,3254, 426,1607, 555,2480, 772,
-1985, 244,2546, 474, 495,1046,2611,1851,2061,  71,2089,1675,2590, 742,3758,2843,
-3222,1433, 267,2180,2576,2826,2233,2092,3913,2435, 956,1745,3075, 856,2113,1116,
- 451,   3,1988,2896,1398, 993,2463,1878,2049,1341,2718,2721,2870,2108, 712,2904,
-4363,2753,2324, 277,2872,2349,2649, 384, 987, 435, 691,3000, 922, 164,3939, 652,
-1500,1184,4153,2482,3373,2165,4848,2335,3775,3508,3154,2806,2830,1554,2102,1664,
-2530,1434,2408, 893,1547,2623,3447,2832,2242,2532,3169,2856,3223,2078,  49,3770,
-3469, 462, 318, 656,2259,3250,3069, 679,1629,2758, 344,1138,1104,3120,1836,1283,
-3115,2154,1437,4448, 934, 759,1999, 794,2862,1038, 533,2560,1722,2342, 855,2626,
-1197,1663,4476,3127,  85,4240,2528,  25,1111,1181,3673, 407,3470,4561,2679,2713,
- 768,1925,2841,3986,1544,1165, 932, 373,1240,2146,1930,2673, 721,4766, 354,4333,
- 391,2963, 187,  61,3364,1442,1102, 330,1940,1767, 341,3809,4118, 393,2496,2062,
-2211, 105, 331, 300, 439, 913,1332, 626, 379,3304,1557, 328, 689,3952, 309,1555,
- 931, 317,2517,3027, 325, 569, 686,2107,3084,  60,1042,1333,2794, 264,3177,4014,
-1628, 258,3712,   7,4464,1176,1043,1778, 683, 114,1975,  78,1492, 383,1886, 510,
- 386, 645,5291,2891,2069,3305,4138,3867,2939,2603,2493,1935,1066,1848,3588,1015,
-1282,1289,4609, 697,1453,3044,2666,3611,1856,2412,  54, 719,1330, 568,3778,2459,
-1748, 788, 492, 551,1191,1000, 488,3394,3763, 282,1799, 348,2016,1523,3155,2390,
-1049, 382,2019,1788,1170, 729,2968,3523, 897,3926,2785,2938,3292, 350,2319,3238,
-1718,1717,2655,3453,3143,4465, 161,2889,2980,2009,1421,  56,1908,1640,2387,2232,
-1917,1874,2477,4921, 148,  83,3438, 592,4245,2882,1822,1055, 741, 115,1496,1624,
- 381,1638,4592,1020, 516,3214, 458, 947,4575,1432, 211,1514,2926,1865,2142, 189,
- 852,1221,1400,1486, 882,2299,4036, 351,  28,1122, 700,6479,6480,6481,6482,6483,  #last 512
-)
-
diff --git a/venv/lib/python3.7/site-packages/chardet/gb2312prober.py b/venv/lib/python3.7/site-packages/chardet/gb2312prober.py
deleted file mode 100644
index 8446d2d..0000000
--- a/venv/lib/python3.7/site-packages/chardet/gb2312prober.py
+++ /dev/null
@@ -1,46 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is mozilla.org code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .mbcharsetprober import MultiByteCharSetProber
-from .codingstatemachine import CodingStateMachine
-from .chardistribution import GB2312DistributionAnalysis
-from .mbcssm import GB2312_SM_MODEL
-
-class GB2312Prober(MultiByteCharSetProber):
-    def __init__(self):
-        super(GB2312Prober, self).__init__()
-        self.coding_sm = CodingStateMachine(GB2312_SM_MODEL)
-        self.distribution_analyzer = GB2312DistributionAnalysis()
-        self.reset()
-
-    @property
-    def charset_name(self):
-        return "GB2312"
-
-    @property
-    def language(self):
-        return "Chinese"
diff --git a/venv/lib/python3.7/site-packages/chardet/hebrewprober.py b/venv/lib/python3.7/site-packages/chardet/hebrewprober.py
deleted file mode 100644
index b0e1bf4..0000000
--- a/venv/lib/python3.7/site-packages/chardet/hebrewprober.py
+++ /dev/null
@@ -1,292 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Universal charset detector code.
-#
-# The Initial Developer of the Original Code is
-#          Shy Shalom
-# Portions created by the Initial Developer are Copyright (C) 2005
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .charsetprober import CharSetProber
-from .enums import ProbingState
-
-# This prober doesn't actually recognize a language or a charset.
-# It is a helper prober for the use of the Hebrew model probers
-
-### General ideas of the Hebrew charset recognition ###
-#
-# Four main charsets exist in Hebrew:
-# "ISO-8859-8" - Visual Hebrew
-# "windows-1255" - Logical Hebrew
-# "ISO-8859-8-I" - Logical Hebrew
-# "x-mac-hebrew" - ?? Logical Hebrew ??
-#
-# Both "ISO" charsets use a completely identical set of code points, whereas
-# "windows-1255" and "x-mac-hebrew" are two different proper supersets of
-# these code points. windows-1255 defines additional characters in the range
-# 0x80-0x9F as some misc punctuation marks as well as some Hebrew-specific
-# diacritics and additional 'Yiddish' ligature letters in the range 0xc0-0xd6.
-# x-mac-hebrew defines similar additional code points but with a different
-# mapping.
-#
-# As far as an average Hebrew text with no diacritics is concerned, all four
-# charsets are identical with respect to code points. Meaning that for the
-# main Hebrew alphabet, all four map the same values to all 27 Hebrew letters
-# (including final letters).
-#
-# The dominant difference between these charsets is their directionality.
-# "Visual" directionality means that the text is ordered as if the renderer is
-# not aware of a BIDI rendering algorithm. The renderer sees the text and
-# draws it from left to right. The text itself when ordered naturally is read
-# backwards. A buffer of Visual Hebrew generally looks like so:
-# "[last word of first line spelled backwards] [whole line ordered backwards
-# and spelled backwards] [first word of first line spelled backwards]
-# [end of line] [last word of second line] ... etc' "
-# adding punctuation marks, numbers and English text to visual text is
-# naturally also "visual" and from left to right.
-#
-# "Logical" directionality means the text is ordered "naturally" according to
-# the order it is read. It is the responsibility of the renderer to display
-# the text from right to left. A BIDI algorithm is used to place general
-# punctuation marks, numbers and English text in the text.
-#
-# Texts in x-mac-hebrew are almost impossible to find on the Internet. From
-# what little evidence I could find, it seems that its general directionality
-# is Logical.
-#
-# To sum up all of the above, the Hebrew probing mechanism knows about two
-# charsets:
-# Visual Hebrew - "ISO-8859-8" - backwards text - Words and sentences are
-#    backwards while line order is natural. For charset recognition purposes
-#    the line order is unimportant (In fact, for this implementation, even
-#    word order is unimportant).
-# Logical Hebrew - "windows-1255" - normal, naturally ordered text.
-#
-# "ISO-8859-8-I" is a subset of windows-1255 and doesn't need to be
-#    specifically identified.
-# "x-mac-hebrew" is also identified as windows-1255. A text in x-mac-hebrew
-#    that contain special punctuation marks or diacritics is displayed with
-#    some unconverted characters showing as question marks. This problem might
-#    be corrected using another model prober for x-mac-hebrew. Due to the fact
-#    that x-mac-hebrew texts are so rare, writing another model prober isn't
-#    worth the effort and performance hit.
-#
-#### The Prober ####
-#
-# The prober is divided between two SBCharSetProbers and a HebrewProber,
-# all of which are managed, created, fed data, inquired and deleted by the
-# SBCSGroupProber. The two SBCharSetProbers identify that the text is in
-# fact some kind of Hebrew, Logical or Visual. The final decision about which
-# one is it is made by the HebrewProber by combining final-letter scores
-# with the scores of the two SBCharSetProbers to produce a final answer.
-#
-# The SBCSGroupProber is responsible for stripping the original text of HTML
-# tags, English characters, numbers, low-ASCII punctuation characters, spaces
-# and new lines. It reduces any sequence of such characters to a single space.
-# The buffer fed to each prober in the SBCS group prober is pure text in
-# high-ASCII.
-# The two SBCharSetProbers (model probers) share the same language model:
-# Win1255Model.
-# The first SBCharSetProber uses the model normally as any other
-# SBCharSetProber does, to recognize windows-1255, upon which this model was
-# built. The second SBCharSetProber is told to make the pair-of-letter
-# lookup in the language model backwards. This in practice exactly simulates
-# a visual Hebrew model using the windows-1255 logical Hebrew model.
-#
-# The HebrewProber is not using any language model. All it does is look for
-# final-letter evidence suggesting the text is either logical Hebrew or visual
-# Hebrew. Disjointed from the model probers, the results of the HebrewProber
-# alone are meaningless. HebrewProber always returns 0.00 as confidence
-# since it never identifies a charset by itself. Instead, the pointer to the
-# HebrewProber is passed to the model probers as a helper "Name Prober".
-# When the Group prober receives a positive identification from any prober,
-# it asks for the name of the charset identified. If the prober queried is a
-# Hebrew model prober, the model prober forwards the call to the
-# HebrewProber to make the final decision. In the HebrewProber, the
-# decision is made according to the final-letters scores maintained and Both
-# model probers scores. The answer is returned in the form of the name of the
-# charset identified, either "windows-1255" or "ISO-8859-8".
-
-class HebrewProber(CharSetProber):
-    # windows-1255 / ISO-8859-8 code points of interest
-    FINAL_KAF = 0xea
-    NORMAL_KAF = 0xeb
-    FINAL_MEM = 0xed
-    NORMAL_MEM = 0xee
-    FINAL_NUN = 0xef
-    NORMAL_NUN = 0xf0
-    FINAL_PE = 0xf3
-    NORMAL_PE = 0xf4
-    FINAL_TSADI = 0xf5
-    NORMAL_TSADI = 0xf6
-
-    # Minimum Visual vs Logical final letter score difference.
-    # If the difference is below this, don't rely solely on the final letter score
-    # distance.
-    MIN_FINAL_CHAR_DISTANCE = 5
-
-    # Minimum Visual vs Logical model score difference.
-    # If the difference is below this, don't rely at all on the model score
-    # distance.
-    MIN_MODEL_DISTANCE = 0.01
-
-    VISUAL_HEBREW_NAME = "ISO-8859-8"
-    LOGICAL_HEBREW_NAME = "windows-1255"
-
-    def __init__(self):
-        super(HebrewProber, self).__init__()
-        self._final_char_logical_score = None
-        self._final_char_visual_score = None
-        self._prev = None
-        self._before_prev = None
-        self._logical_prober = None
-        self._visual_prober = None
-        self.reset()
-
-    def reset(self):
-        self._final_char_logical_score = 0
-        self._final_char_visual_score = 0
-        # The two last characters seen in the previous buffer,
-        # mPrev and mBeforePrev are initialized to space in order to simulate
-        # a word delimiter at the beginning of the data
-        self._prev = ' '
-        self._before_prev = ' '
-        # These probers are owned by the group prober.
-
-    def set_model_probers(self, logicalProber, visualProber):
-        self._logical_prober = logicalProber
-        self._visual_prober = visualProber
-
-    def is_final(self, c):
-        return c in [self.FINAL_KAF, self.FINAL_MEM, self.FINAL_NUN,
-                     self.FINAL_PE, self.FINAL_TSADI]
-
-    def is_non_final(self, c):
-        # The normal Tsadi is not a good Non-Final letter due to words like
-        # 'lechotet' (to chat) containing an apostrophe after the tsadi. This
-        # apostrophe is converted to a space in FilterWithoutEnglishLetters
-        # causing the Non-Final tsadi to appear at an end of a word even
-        # though this is not the case in the original text.
-        # The letters Pe and Kaf rarely display a related behavior of not being
-        # a good Non-Final letter. Words like 'Pop', 'Winamp' and 'Mubarak'
-        # for example legally end with a Non-Final Pe or Kaf. However, the
-        # benefit of these letters as Non-Final letters outweighs the damage
-        # since these words are quite rare.
-        return c in [self.NORMAL_KAF, self.NORMAL_MEM,
-                     self.NORMAL_NUN, self.NORMAL_PE]
-
-    def feed(self, byte_str):
-        # Final letter analysis for logical-visual decision.
-        # Look for evidence that the received buffer is either logical Hebrew
-        # or visual Hebrew.
-        # The following cases are checked:
-        # 1) A word longer than 1 letter, ending with a final letter. This is
-        #    an indication that the text is laid out "naturally" since the
-        #    final letter really appears at the end. +1 for logical score.
-        # 2) A word longer than 1 letter, ending with a Non-Final letter. In
-        #    normal Hebrew, words ending with Kaf, Mem, Nun, Pe or Tsadi,
-        #    should not end with the Non-Final form of that letter. Exceptions
-        #    to this rule are mentioned above in isNonFinal(). This is an
-        #    indication that the text is laid out backwards. +1 for visual
-        #    score
-        # 3) A word longer than 1 letter, starting with a final letter. Final
-        #    letters should not appear at the beginning of a word. This is an
-        #    indication that the text is laid out backwards. +1 for visual
-        #    score.
-        #
-        # The visual score and logical score are accumulated throughout the
-        # text and are finally checked against each other in GetCharSetName().
-        # No checking for final letters in the middle of words is done since
-        # that case is not an indication for either Logical or Visual text.
-        #
-        # We automatically filter out all 7-bit characters (replace them with
-        # spaces) so the word boundary detection works properly. [MAP]
-
-        if self.state == ProbingState.NOT_ME:
-            # Both model probers say it's not them. No reason to continue.
-            return ProbingState.NOT_ME
-
-        byte_str = self.filter_high_byte_only(byte_str)
-
-        for cur in byte_str:
-            if cur == ' ':
-                # We stand on a space - a word just ended
-                if self._before_prev != ' ':
-                    # next-to-last char was not a space so self._prev is not a
-                    # 1 letter word
-                    if self.is_final(self._prev):
-                        # case (1) [-2:not space][-1:final letter][cur:space]
-                        self._final_char_logical_score += 1
-                    elif self.is_non_final(self._prev):
-                        # case (2) [-2:not space][-1:Non-Final letter][
-                        #  cur:space]
-                        self._final_char_visual_score += 1
-            else:
-                # Not standing on a space
-                if ((self._before_prev == ' ') and
-                        (self.is_final(self._prev)) and (cur != ' ')):
-                    # case (3) [-2:space][-1:final letter][cur:not space]
-                    self._final_char_visual_score += 1
-            self._before_prev = self._prev
-            self._prev = cur
-
-        # Forever detecting, till the end or until both model probers return
-        # ProbingState.NOT_ME (handled above)
-        return ProbingState.DETECTING
-
-    @property
-    def charset_name(self):
-        # Make the decision: is it Logical or Visual?
-        # If the final letter score distance is dominant enough, rely on it.
-        finalsub = self._final_char_logical_score - self._final_char_visual_score
-        if finalsub >= self.MIN_FINAL_CHAR_DISTANCE:
-            return self.LOGICAL_HEBREW_NAME
-        if finalsub <= -self.MIN_FINAL_CHAR_DISTANCE:
-            return self.VISUAL_HEBREW_NAME
-
-        # It's not dominant enough, try to rely on the model scores instead.
-        modelsub = (self._logical_prober.get_confidence()
-                    - self._visual_prober.get_confidence())
-        if modelsub > self.MIN_MODEL_DISTANCE:
-            return self.LOGICAL_HEBREW_NAME
-        if modelsub < -self.MIN_MODEL_DISTANCE:
-            return self.VISUAL_HEBREW_NAME
-
-        # Still no good, back to final letter distance, maybe it'll save the
-        # day.
-        if finalsub < 0.0:
-            return self.VISUAL_HEBREW_NAME
-
-        # (finalsub > 0 - Logical) or (don't know what to do) default to
-        # Logical.
-        return self.LOGICAL_HEBREW_NAME
-
-    @property
-    def language(self):
-        return 'Hebrew'
-
-    @property
-    def state(self):
-        # Remain active as long as any of the model probers are active.
-        if (self._logical_prober.state == ProbingState.NOT_ME) and \
-           (self._visual_prober.state == ProbingState.NOT_ME):
-            return ProbingState.NOT_ME
-        return ProbingState.DETECTING
diff --git a/venv/lib/python3.7/site-packages/chardet/jisfreq.py b/venv/lib/python3.7/site-packages/chardet/jisfreq.py
deleted file mode 100644
index 83fc082..0000000
--- a/venv/lib/python3.7/site-packages/chardet/jisfreq.py
+++ /dev/null
@@ -1,325 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-# Sampling from about 20M text materials include literature and computer technology
-#
-# Japanese frequency table, applied to both S-JIS and EUC-JP
-# They are sorted in order.
-
-# 128  --> 0.77094
-# 256  --> 0.85710
-# 512  --> 0.92635
-# 1024 --> 0.97130
-# 2048 --> 0.99431
-#
-# Ideal Distribution Ratio = 0.92635 / (1-0.92635) = 12.58
-# Random Distribution Ration = 512 / (2965+62+83+86-512) = 0.191
-#
-# Typical Distribution Ratio, 25% of IDR
-
-JIS_TYPICAL_DISTRIBUTION_RATIO = 3.0
-
-# Char to FreqOrder table ,
-JIS_TABLE_SIZE = 4368
-
-JIS_CHAR_TO_FREQ_ORDER = (
-  40,   1,   6, 182, 152, 180, 295,2127, 285, 381,3295,4304,3068,4606,3165,3510, #   16
-3511,1822,2785,4607,1193,2226,5070,4608, 171,2996,1247,  18, 179,5071, 856,1661, #   32
-1262,5072, 619, 127,3431,3512,3230,1899,1700, 232, 228,1294,1298, 284, 283,2041, #   48
-2042,1061,1062,  48,  49,  44,  45, 433, 434,1040,1041, 996, 787,2997,1255,4305, #   64
-2108,4609,1684,1648,5073,5074,5075,5076,5077,5078,3687,5079,4610,5080,3927,3928, #   80
-5081,3296,3432, 290,2285,1471,2187,5082,2580,2825,1303,2140,1739,1445,2691,3375, #   96
-1691,3297,4306,4307,4611, 452,3376,1182,2713,3688,3069,4308,5083,5084,5085,5086, #  112
-5087,5088,5089,5090,5091,5092,5093,5094,5095,5096,5097,5098,5099,5100,5101,5102, #  128
-5103,5104,5105,5106,5107,5108,5109,5110,5111,5112,4097,5113,5114,5115,5116,5117, #  144
-5118,5119,5120,5121,5122,5123,5124,5125,5126,5127,5128,5129,5130,5131,5132,5133, #  160
-5134,5135,5136,5137,5138,5139,5140,5141,5142,5143,5144,5145,5146,5147,5148,5149, #  176
-5150,5151,5152,4612,5153,5154,5155,5156,5157,5158,5159,5160,5161,5162,5163,5164, #  192
-5165,5166,5167,5168,5169,5170,5171,5172,5173,5174,5175,1472, 598, 618, 820,1205, #  208
-1309,1412,1858,1307,1692,5176,5177,5178,5179,5180,5181,5182,1142,1452,1234,1172, #  224
-1875,2043,2149,1793,1382,2973, 925,2404,1067,1241, 960,1377,2935,1491, 919,1217, #  240
-1865,2030,1406,1499,2749,4098,5183,5184,5185,5186,5187,5188,2561,4099,3117,1804, #  256
-2049,3689,4309,3513,1663,5189,3166,3118,3298,1587,1561,3433,5190,3119,1625,2998, #  272
-3299,4613,1766,3690,2786,4614,5191,5192,5193,5194,2161,  26,3377,   2,3929,  20, #  288
-3691,  47,4100,  50,  17,  16,  35, 268,  27, 243,  42, 155,  24, 154,  29, 184, #  304
-   4,  91,  14,  92,  53, 396,  33, 289,   9,  37,  64, 620,  21,  39, 321,   5, #  320
-  12,  11,  52,  13,   3, 208, 138,   0,   7,  60, 526, 141, 151,1069, 181, 275, #  336
-1591,  83, 132,1475, 126, 331, 829,  15,  69, 160,  59,  22, 157,  55,1079, 312, #  352
- 109,  38,  23,  25,  10,  19,  79,5195,  61, 382,1124,   8,  30,5196,5197,5198, #  368
-5199,5200,5201,5202,5203,5204,5205,5206,  89,  62,  74,  34,2416, 112, 139, 196, #  384
- 271, 149,  84, 607, 131, 765,  46,  88, 153, 683,  76, 874, 101, 258,  57,  80, #  400
-  32, 364, 121,1508, 169,1547,  68, 235, 145,2999,  41, 360,3027,  70,  63,  31, #  416
-  43, 259, 262,1383,  99, 533, 194,  66,  93, 846, 217, 192,  56, 106,  58, 565, #  432
- 280, 272, 311, 256, 146,  82, 308,  71, 100, 128, 214, 655, 110, 261, 104,1140, #  448
-  54,  51,  36,  87,  67,3070, 185,2618,2936,2020,  28,1066,2390,2059,5207,5208, #  464
-5209,5210,5211,5212,5213,5214,5215,5216,4615,5217,5218,5219,5220,5221,5222,5223, #  480
-5224,5225,5226,5227,5228,5229,5230,5231,5232,5233,5234,5235,5236,3514,5237,5238, #  496
-5239,5240,5241,5242,5243,5244,2297,2031,4616,4310,3692,5245,3071,5246,3598,5247, #  512
-4617,3231,3515,5248,4101,4311,4618,3808,4312,4102,5249,4103,4104,3599,5250,5251, #  528
-5252,5253,5254,5255,5256,5257,5258,5259,5260,5261,5262,5263,5264,5265,5266,5267, #  544
-5268,5269,5270,5271,5272,5273,5274,5275,5276,5277,5278,5279,5280,5281,5282,5283, #  560
-5284,5285,5286,5287,5288,5289,5290,5291,5292,5293,5294,5295,5296,5297,5298,5299, #  576
-5300,5301,5302,5303,5304,5305,5306,5307,5308,5309,5310,5311,5312,5313,5314,5315, #  592
-5316,5317,5318,5319,5320,5321,5322,5323,5324,5325,5326,5327,5328,5329,5330,5331, #  608
-5332,5333,5334,5335,5336,5337,5338,5339,5340,5341,5342,5343,5344,5345,5346,5347, #  624
-5348,5349,5350,5351,5352,5353,5354,5355,5356,5357,5358,5359,5360,5361,5362,5363, #  640
-5364,5365,5366,5367,5368,5369,5370,5371,5372,5373,5374,5375,5376,5377,5378,5379, #  656
-5380,5381, 363, 642,2787,2878,2788,2789,2316,3232,2317,3434,2011, 165,1942,3930, #  672
-3931,3932,3933,5382,4619,5383,4620,5384,5385,5386,5387,5388,5389,5390,5391,5392, #  688
-5393,5394,5395,5396,5397,5398,5399,5400,5401,5402,5403,5404,5405,5406,5407,5408, #  704
-5409,5410,5411,5412,5413,5414,5415,5416,5417,5418,5419,5420,5421,5422,5423,5424, #  720
-5425,5426,5427,5428,5429,5430,5431,5432,5433,5434,5435,5436,5437,5438,5439,5440, #  736
-5441,5442,5443,5444,5445,5446,5447,5448,5449,5450,5451,5452,5453,5454,5455,5456, #  752
-5457,5458,5459,5460,5461,5462,5463,5464,5465,5466,5467,5468,5469,5470,5471,5472, #  768
-5473,5474,5475,5476,5477,5478,5479,5480,5481,5482,5483,5484,5485,5486,5487,5488, #  784
-5489,5490,5491,5492,5493,5494,5495,5496,5497,5498,5499,5500,5501,5502,5503,5504, #  800
-5505,5506,5507,5508,5509,5510,5511,5512,5513,5514,5515,5516,5517,5518,5519,5520, #  816
-5521,5522,5523,5524,5525,5526,5527,5528,5529,5530,5531,5532,5533,5534,5535,5536, #  832
-5537,5538,5539,5540,5541,5542,5543,5544,5545,5546,5547,5548,5549,5550,5551,5552, #  848
-5553,5554,5555,5556,5557,5558,5559,5560,5561,5562,5563,5564,5565,5566,5567,5568, #  864
-5569,5570,5571,5572,5573,5574,5575,5576,5577,5578,5579,5580,5581,5582,5583,5584, #  880
-5585,5586,5587,5588,5589,5590,5591,5592,5593,5594,5595,5596,5597,5598,5599,5600, #  896
-5601,5602,5603,5604,5605,5606,5607,5608,5609,5610,5611,5612,5613,5614,5615,5616, #  912
-5617,5618,5619,5620,5621,5622,5623,5624,5625,5626,5627,5628,5629,5630,5631,5632, #  928
-5633,5634,5635,5636,5637,5638,5639,5640,5641,5642,5643,5644,5645,5646,5647,5648, #  944
-5649,5650,5651,5652,5653,5654,5655,5656,5657,5658,5659,5660,5661,5662,5663,5664, #  960
-5665,5666,5667,5668,5669,5670,5671,5672,5673,5674,5675,5676,5677,5678,5679,5680, #  976
-5681,5682,5683,5684,5685,5686,5687,5688,5689,5690,5691,5692,5693,5694,5695,5696, #  992
-5697,5698,5699,5700,5701,5702,5703,5704,5705,5706,5707,5708,5709,5710,5711,5712, # 1008
-5713,5714,5715,5716,5717,5718,5719,5720,5721,5722,5723,5724,5725,5726,5727,5728, # 1024
-5729,5730,5731,5732,5733,5734,5735,5736,5737,5738,5739,5740,5741,5742,5743,5744, # 1040
-5745,5746,5747,5748,5749,5750,5751,5752,5753,5754,5755,5756,5757,5758,5759,5760, # 1056
-5761,5762,5763,5764,5765,5766,5767,5768,5769,5770,5771,5772,5773,5774,5775,5776, # 1072
-5777,5778,5779,5780,5781,5782,5783,5784,5785,5786,5787,5788,5789,5790,5791,5792, # 1088
-5793,5794,5795,5796,5797,5798,5799,5800,5801,5802,5803,5804,5805,5806,5807,5808, # 1104
-5809,5810,5811,5812,5813,5814,5815,5816,5817,5818,5819,5820,5821,5822,5823,5824, # 1120
-5825,5826,5827,5828,5829,5830,5831,5832,5833,5834,5835,5836,5837,5838,5839,5840, # 1136
-5841,5842,5843,5844,5845,5846,5847,5848,5849,5850,5851,5852,5853,5854,5855,5856, # 1152
-5857,5858,5859,5860,5861,5862,5863,5864,5865,5866,5867,5868,5869,5870,5871,5872, # 1168
-5873,5874,5875,5876,5877,5878,5879,5880,5881,5882,5883,5884,5885,5886,5887,5888, # 1184
-5889,5890,5891,5892,5893,5894,5895,5896,5897,5898,5899,5900,5901,5902,5903,5904, # 1200
-5905,5906,5907,5908,5909,5910,5911,5912,5913,5914,5915,5916,5917,5918,5919,5920, # 1216
-5921,5922,5923,5924,5925,5926,5927,5928,5929,5930,5931,5932,5933,5934,5935,5936, # 1232
-5937,5938,5939,5940,5941,5942,5943,5944,5945,5946,5947,5948,5949,5950,5951,5952, # 1248
-5953,5954,5955,5956,5957,5958,5959,5960,5961,5962,5963,5964,5965,5966,5967,5968, # 1264
-5969,5970,5971,5972,5973,5974,5975,5976,5977,5978,5979,5980,5981,5982,5983,5984, # 1280
-5985,5986,5987,5988,5989,5990,5991,5992,5993,5994,5995,5996,5997,5998,5999,6000, # 1296
-6001,6002,6003,6004,6005,6006,6007,6008,6009,6010,6011,6012,6013,6014,6015,6016, # 1312
-6017,6018,6019,6020,6021,6022,6023,6024,6025,6026,6027,6028,6029,6030,6031,6032, # 1328
-6033,6034,6035,6036,6037,6038,6039,6040,6041,6042,6043,6044,6045,6046,6047,6048, # 1344
-6049,6050,6051,6052,6053,6054,6055,6056,6057,6058,6059,6060,6061,6062,6063,6064, # 1360
-6065,6066,6067,6068,6069,6070,6071,6072,6073,6074,6075,6076,6077,6078,6079,6080, # 1376
-6081,6082,6083,6084,6085,6086,6087,6088,6089,6090,6091,6092,6093,6094,6095,6096, # 1392
-6097,6098,6099,6100,6101,6102,6103,6104,6105,6106,6107,6108,6109,6110,6111,6112, # 1408
-6113,6114,2044,2060,4621, 997,1235, 473,1186,4622, 920,3378,6115,6116, 379,1108, # 1424
-4313,2657,2735,3934,6117,3809, 636,3233, 573,1026,3693,3435,2974,3300,2298,4105, # 1440
- 854,2937,2463, 393,2581,2417, 539, 752,1280,2750,2480, 140,1161, 440, 708,1569, # 1456
- 665,2497,1746,1291,1523,3000, 164,1603, 847,1331, 537,1997, 486, 508,1693,2418, # 1472
-1970,2227, 878,1220, 299,1030, 969, 652,2751, 624,1137,3301,2619,  65,3302,2045, # 1488
-1761,1859,3120,1930,3694,3516, 663,1767, 852, 835,3695, 269, 767,2826,2339,1305, # 1504
- 896,1150, 770,1616,6118, 506,1502,2075,1012,2519, 775,2520,2975,2340,2938,4314, # 1520
-3028,2086,1224,1943,2286,6119,3072,4315,2240,1273,1987,3935,1557, 175, 597, 985, # 1536
-3517,2419,2521,1416,3029, 585, 938,1931,1007,1052,1932,1685,6120,3379,4316,4623, # 1552
- 804, 599,3121,1333,2128,2539,1159,1554,2032,3810, 687,2033,2904, 952, 675,1467, # 1568
-3436,6121,2241,1096,1786,2440,1543,1924, 980,1813,2228, 781,2692,1879, 728,1918, # 1584
-3696,4624, 548,1950,4625,1809,1088,1356,3303,2522,1944, 502, 972, 373, 513,2827, # 1600
- 586,2377,2391,1003,1976,1631,6122,2464,1084, 648,1776,4626,2141, 324, 962,2012, # 1616
-2177,2076,1384, 742,2178,1448,1173,1810, 222, 102, 301, 445, 125,2420, 662,2498, # 1632
- 277, 200,1476,1165,1068, 224,2562,1378,1446, 450,1880, 659, 791, 582,4627,2939, # 1648
-3936,1516,1274, 555,2099,3697,1020,1389,1526,3380,1762,1723,1787,2229, 412,2114, # 1664
-1900,2392,3518, 512,2597, 427,1925,2341,3122,1653,1686,2465,2499, 697, 330, 273, # 1680
- 380,2162, 951, 832, 780, 991,1301,3073, 965,2270,3519, 668,2523,2636,1286, 535, # 1696
-1407, 518, 671, 957,2658,2378, 267, 611,2197,3030,6123, 248,2299, 967,1799,2356, # 1712
- 850,1418,3437,1876,1256,1480,2828,1718,6124,6125,1755,1664,2405,6126,4628,2879, # 1728
-2829, 499,2179, 676,4629, 557,2329,2214,2090, 325,3234, 464, 811,3001, 992,2342, # 1744
-2481,1232,1469, 303,2242, 466,1070,2163, 603,1777,2091,4630,2752,4631,2714, 322, # 1760
-2659,1964,1768, 481,2188,1463,2330,2857,3600,2092,3031,2421,4632,2318,2070,1849, # 1776
-2598,4633,1302,2254,1668,1701,2422,3811,2905,3032,3123,2046,4106,1763,1694,4634, # 1792
-1604, 943,1724,1454, 917, 868,2215,1169,2940, 552,1145,1800,1228,1823,1955, 316, # 1808
-1080,2510, 361,1807,2830,4107,2660,3381,1346,1423,1134,4108,6127, 541,1263,1229, # 1824
-1148,2540, 545, 465,1833,2880,3438,1901,3074,2482, 816,3937, 713,1788,2500, 122, # 1840
-1575, 195,1451,2501,1111,6128, 859, 374,1225,2243,2483,4317, 390,1033,3439,3075, # 1856
-2524,1687, 266, 793,1440,2599, 946, 779, 802, 507, 897,1081, 528,2189,1292, 711, # 1872
-1866,1725,1167,1640, 753, 398,2661,1053, 246, 348,4318, 137,1024,3440,1600,2077, # 1888
-2129, 825,4319, 698, 238, 521, 187,2300,1157,2423,1641,1605,1464,1610,1097,2541, # 1904
-1260,1436, 759,2255,1814,2150, 705,3235, 409,2563,3304, 561,3033,2005,2564, 726, # 1920
-1956,2343,3698,4109, 949,3812,3813,3520,1669, 653,1379,2525, 881,2198, 632,2256, # 1936
-1027, 778,1074, 733,1957, 514,1481,2466, 554,2180, 702,3938,1606,1017,1398,6129, # 1952
-1380,3521, 921, 993,1313, 594, 449,1489,1617,1166, 768,1426,1360, 495,1794,3601, # 1968
-1177,3602,1170,4320,2344, 476, 425,3167,4635,3168,1424, 401,2662,1171,3382,1998, # 1984
-1089,4110, 477,3169, 474,6130,1909, 596,2831,1842, 494, 693,1051,1028,1207,3076, # 2000
- 606,2115, 727,2790,1473,1115, 743,3522, 630, 805,1532,4321,2021, 366,1057, 838, # 2016
- 684,1114,2142,4322,2050,1492,1892,1808,2271,3814,2424,1971,1447,1373,3305,1090, # 2032
-1536,3939,3523,3306,1455,2199, 336, 369,2331,1035, 584,2393, 902, 718,2600,6131, # 2048
-2753, 463,2151,1149,1611,2467, 715,1308,3124,1268, 343,1413,3236,1517,1347,2663, # 2064
-2093,3940,2022,1131,1553,2100,2941,1427,3441,2942,1323,2484,6132,1980, 872,2368, # 2080
-2441,2943, 320,2369,2116,1082, 679,1933,3941,2791,3815, 625,1143,2023, 422,2200, # 2096
-3816,6133, 730,1695, 356,2257,1626,2301,2858,2637,1627,1778, 937, 883,2906,2693, # 2112
-3002,1769,1086, 400,1063,1325,3307,2792,4111,3077, 456,2345,1046, 747,6134,1524, # 2128
- 884,1094,3383,1474,2164,1059, 974,1688,2181,2258,1047, 345,1665,1187, 358, 875, # 2144
-3170, 305, 660,3524,2190,1334,1135,3171,1540,1649,2542,1527, 927, 968,2793, 885, # 2160
-1972,1850, 482, 500,2638,1218,1109,1085,2543,1654,2034, 876,  78,2287,1482,1277, # 2176
- 861,1675,1083,1779, 724,2754, 454, 397,1132,1612,2332, 893, 672,1237, 257,2259, # 2192
-2370, 135,3384, 337,2244, 547, 352, 340, 709,2485,1400, 788,1138,2511, 540, 772, # 2208
-1682,2260,2272,2544,2013,1843,1902,4636,1999,1562,2288,4637,2201,1403,1533, 407, # 2224
- 576,3308,1254,2071, 978,3385, 170, 136,1201,3125,2664,3172,2394, 213, 912, 873, # 2240
-3603,1713,2202, 699,3604,3699, 813,3442, 493, 531,1054, 468,2907,1483, 304, 281, # 2256
-4112,1726,1252,2094, 339,2319,2130,2639, 756,1563,2944, 748, 571,2976,1588,2425, # 2272
-2715,1851,1460,2426,1528,1392,1973,3237, 288,3309, 685,3386, 296, 892,2716,2216, # 2288
-1570,2245, 722,1747,2217, 905,3238,1103,6135,1893,1441,1965, 251,1805,2371,3700, # 2304
-2601,1919,1078,  75,2182,1509,1592,1270,2640,4638,2152,6136,3310,3817, 524, 706, # 2320
-1075, 292,3818,1756,2602, 317,  98,3173,3605,3525,1844,2218,3819,2502, 814, 567, # 2336
- 385,2908,1534,6137, 534,1642,3239, 797,6138,1670,1529, 953,4323, 188,1071, 538, # 2352
- 178, 729,3240,2109,1226,1374,2000,2357,2977, 731,2468,1116,2014,2051,6139,1261, # 2368
-1593, 803,2859,2736,3443, 556, 682, 823,1541,6140,1369,2289,1706,2794, 845, 462, # 2384
-2603,2665,1361, 387, 162,2358,1740, 739,1770,1720,1304,1401,3241,1049, 627,1571, # 2400
-2427,3526,1877,3942,1852,1500, 431,1910,1503, 677, 297,2795, 286,1433,1038,1198, # 2416
-2290,1133,1596,4113,4639,2469,1510,1484,3943,6141,2442, 108, 712,4640,2372, 866, # 2432
-3701,2755,3242,1348, 834,1945,1408,3527,2395,3243,1811, 824, 994,1179,2110,1548, # 2448
-1453, 790,3003, 690,4324,4325,2832,2909,3820,1860,3821, 225,1748, 310, 346,1780, # 2464
-2470, 821,1993,2717,2796, 828, 877,3528,2860,2471,1702,2165,2910,2486,1789, 453, # 2480
- 359,2291,1676,  73,1164,1461,1127,3311, 421, 604, 314,1037, 589, 116,2487, 737, # 2496
- 837,1180, 111, 244, 735,6142,2261,1861,1362, 986, 523, 418, 581,2666,3822, 103, # 2512
- 855, 503,1414,1867,2488,1091, 657,1597, 979, 605,1316,4641,1021,2443,2078,2001, # 2528
-1209,  96, 587,2166,1032, 260,1072,2153, 173,  94, 226,3244, 819,2006,4642,4114, # 2544
-2203, 231,1744, 782,  97,2667, 786,3387, 887, 391, 442,2219,4326,1425,6143,2694, # 2560
- 633,1544,1202, 483,2015, 592,2052,1958,2472,1655, 419, 129,4327,3444,3312,1714, # 2576
-1257,3078,4328,1518,1098, 865,1310,1019,1885,1512,1734, 469,2444, 148, 773, 436, # 2592
-1815,1868,1128,1055,4329,1245,2756,3445,2154,1934,1039,4643, 579,1238, 932,2320, # 2608
- 353, 205, 801, 115,2428, 944,2321,1881, 399,2565,1211, 678, 766,3944, 335,2101, # 2624
-1459,1781,1402,3945,2737,2131,1010, 844, 981,1326,1013, 550,1816,1545,2620,1335, # 2640
-1008, 371,2881, 936,1419,1613,3529,1456,1395,2273,1834,2604,1317,2738,2503, 416, # 2656
-1643,4330, 806,1126, 229, 591,3946,1314,1981,1576,1837,1666, 347,1790, 977,3313, # 2672
- 764,2861,1853, 688,2429,1920,1462,  77, 595, 415,2002,3034, 798,1192,4115,6144, # 2688
-2978,4331,3035,2695,2582,2072,2566, 430,2430,1727, 842,1396,3947,3702, 613, 377, # 2704
- 278, 236,1417,3388,3314,3174, 757,1869, 107,3530,6145,1194, 623,2262, 207,1253, # 2720
-2167,3446,3948, 492,1117,1935, 536,1838,2757,1246,4332, 696,2095,2406,1393,1572, # 2736
-3175,1782, 583, 190, 253,1390,2230, 830,3126,3389, 934,3245,1703,1749,2979,1870, # 2752
-2545,1656,2204, 869,2346,4116,3176,1817, 496,1764,4644, 942,1504, 404,1903,1122, # 2768
-1580,3606,2945,1022, 515, 372,1735, 955,2431,3036,6146,2797,1110,2302,2798, 617, # 2784
-6147, 441, 762,1771,3447,3607,3608,1904, 840,3037,  86, 939,1385, 572,1370,2445, # 2800
-1336, 114,3703, 898, 294, 203,3315, 703,1583,2274, 429, 961,4333,1854,1951,3390, # 2816
-2373,3704,4334,1318,1381, 966,1911,2322,1006,1155, 309, 989, 458,2718,1795,1372, # 2832
-1203, 252,1689,1363,3177, 517,1936, 168,1490, 562, 193,3823,1042,4117,1835, 551, # 2848
- 470,4645, 395, 489,3448,1871,1465,2583,2641, 417,1493, 279,1295, 511,1236,1119, # 2864
-  72,1231,1982,1812,3004, 871,1564, 984,3449,1667,2696,2096,4646,2347,2833,1673, # 2880
-3609, 695,3246,2668, 807,1183,4647, 890, 388,2333,1801,1457,2911,1765,1477,1031, # 2896
-3316,3317,1278,3391,2799,2292,2526, 163,3450,4335,2669,1404,1802,6148,2323,2407, # 2912
-1584,1728,1494,1824,1269, 298, 909,3318,1034,1632, 375, 776,1683,2061, 291, 210, # 2928
-1123, 809,1249,1002,2642,3038, 206,1011,2132, 144, 975, 882,1565, 342, 667, 754, # 2944
-1442,2143,1299,2303,2062, 447, 626,2205,1221,2739,2912,1144,1214,2206,2584, 760, # 2960
-1715, 614, 950,1281,2670,2621, 810, 577,1287,2546,4648, 242,2168, 250,2643, 691, # 2976
- 123,2644, 647, 313,1029, 689,1357,2946,1650, 216, 771,1339,1306, 808,2063, 549, # 2992
- 913,1371,2913,2914,6149,1466,1092,1174,1196,1311,2605,2396,1783,1796,3079, 406, # 3008
-2671,2117,3949,4649, 487,1825,2220,6150,2915, 448,2348,1073,6151,2397,1707, 130, # 3024
- 900,1598, 329, 176,1959,2527,1620,6152,2275,4336,3319,1983,2191,3705,3610,2155, # 3040
-3706,1912,1513,1614,6153,1988, 646, 392,2304,1589,3320,3039,1826,1239,1352,1340, # 3056
-2916, 505,2567,1709,1437,2408,2547, 906,6154,2672, 384,1458,1594,1100,1329, 710, # 3072
- 423,3531,2064,2231,2622,1989,2673,1087,1882, 333, 841,3005,1296,2882,2379, 580, # 3088
-1937,1827,1293,2585, 601, 574, 249,1772,4118,2079,1120, 645, 901,1176,1690, 795, # 3104
-2207, 478,1434, 516,1190,1530, 761,2080, 930,1264, 355, 435,1552, 644,1791, 987, # 3120
- 220,1364,1163,1121,1538, 306,2169,1327,1222, 546,2645, 218, 241, 610,1704,3321, # 3136
-1984,1839,1966,2528, 451,6155,2586,3707,2568, 907,3178, 254,2947, 186,1845,4650, # 3152
- 745, 432,1757, 428,1633, 888,2246,2221,2489,3611,2118,1258,1265, 956,3127,1784, # 3168
-4337,2490, 319, 510, 119, 457,3612, 274,2035,2007,4651,1409,3128, 970,2758, 590, # 3184
-2800, 661,2247,4652,2008,3950,1420,1549,3080,3322,3951,1651,1375,2111, 485,2491, # 3200
-1429,1156,6156,2548,2183,1495, 831,1840,2529,2446, 501,1657, 307,1894,3247,1341, # 3216
- 666, 899,2156,1539,2549,1559, 886, 349,2208,3081,2305,1736,3824,2170,2759,1014, # 3232
-1913,1386, 542,1397,2948, 490, 368, 716, 362, 159, 282,2569,1129,1658,1288,1750, # 3248
-2674, 276, 649,2016, 751,1496, 658,1818,1284,1862,2209,2087,2512,3451, 622,2834, # 3264
- 376, 117,1060,2053,1208,1721,1101,1443, 247,1250,3179,1792,3952,2760,2398,3953, # 3280
-6157,2144,3708, 446,2432,1151,2570,3452,2447,2761,2835,1210,2448,3082, 424,2222, # 3296
-1251,2449,2119,2836, 504,1581,4338, 602, 817, 857,3825,2349,2306, 357,3826,1470, # 3312
-1883,2883, 255, 958, 929,2917,3248, 302,4653,1050,1271,1751,2307,1952,1430,2697, # 3328
-2719,2359, 354,3180, 777, 158,2036,4339,1659,4340,4654,2308,2949,2248,1146,2232, # 3344
-3532,2720,1696,2623,3827,6158,3129,1550,2698,1485,1297,1428, 637, 931,2721,2145, # 3360
- 914,2550,2587,  81,2450, 612, 827,2646,1242,4655,1118,2884, 472,1855,3181,3533, # 3376
-3534, 569,1353,2699,1244,1758,2588,4119,2009,2762,2171,3709,1312,1531,6159,1152, # 3392
-1938, 134,1830, 471,3710,2276,1112,1535,3323,3453,3535, 982,1337,2950, 488, 826, # 3408
- 674,1058,1628,4120,2017, 522,2399, 211, 568,1367,3454, 350, 293,1872,1139,3249, # 3424
-1399,1946,3006,1300,2360,3324, 588, 736,6160,2606, 744, 669,3536,3828,6161,1358, # 3440
- 199, 723, 848, 933, 851,1939,1505,1514,1338,1618,1831,4656,1634,3613, 443,2740, # 3456
-3829, 717,1947, 491,1914,6162,2551,1542,4121,1025,6163,1099,1223, 198,3040,2722, # 3472
- 370, 410,1905,2589, 998,1248,3182,2380, 519,1449,4122,1710, 947, 928,1153,4341, # 3488
-2277, 344,2624,1511, 615, 105, 161,1212,1076,1960,3130,2054,1926,1175,1906,2473, # 3504
- 414,1873,2801,6164,2309, 315,1319,3325, 318,2018,2146,2157, 963, 631, 223,4342, # 3520
-4343,2675, 479,3711,1197,2625,3712,2676,2361,6165,4344,4123,6166,2451,3183,1886, # 3536
-2184,1674,1330,1711,1635,1506, 799, 219,3250,3083,3954,1677,3713,3326,2081,3614, # 3552
-1652,2073,4657,1147,3041,1752, 643,1961, 147,1974,3955,6167,1716,2037, 918,3007, # 3568
-1994, 120,1537, 118, 609,3184,4345, 740,3455,1219, 332,1615,3830,6168,1621,2980, # 3584
-1582, 783, 212, 553,2350,3714,1349,2433,2082,4124, 889,6169,2310,1275,1410, 973, # 3600
- 166,1320,3456,1797,1215,3185,2885,1846,2590,2763,4658, 629, 822,3008, 763, 940, # 3616
-1990,2862, 439,2409,1566,1240,1622, 926,1282,1907,2764, 654,2210,1607, 327,1130, # 3632
-3956,1678,1623,6170,2434,2192, 686, 608,3831,3715, 903,3957,3042,6171,2741,1522, # 3648
-1915,1105,1555,2552,1359, 323,3251,4346,3457, 738,1354,2553,2311,2334,1828,2003, # 3664
-3832,1753,2351,1227,6172,1887,4125,1478,6173,2410,1874,1712,1847, 520,1204,2607, # 3680
- 264,4659, 836,2677,2102, 600,4660,3833,2278,3084,6174,4347,3615,1342, 640, 532, # 3696
- 543,2608,1888,2400,2591,1009,4348,1497, 341,1737,3616,2723,1394, 529,3252,1321, # 3712
- 983,4661,1515,2120, 971,2592, 924, 287,1662,3186,4349,2700,4350,1519, 908,1948, # 3728
-2452, 156, 796,1629,1486,2223,2055, 694,4126,1259,1036,3392,1213,2249,2742,1889, # 3744
-1230,3958,1015, 910, 408, 559,3617,4662, 746, 725, 935,4663,3959,3009,1289, 563, # 3760
- 867,4664,3960,1567,2981,2038,2626, 988,2263,2381,4351, 143,2374, 704,1895,6175, # 3776
-1188,3716,2088, 673,3085,2362,4352, 484,1608,1921,2765,2918, 215, 904,3618,3537, # 3792
- 894, 509, 976,3043,2701,3961,4353,2837,2982, 498,6176,6177,1102,3538,1332,3393, # 3808
-1487,1636,1637, 233, 245,3962, 383, 650, 995,3044, 460,1520,1206,2352, 749,3327, # 3824
- 530, 700, 389,1438,1560,1773,3963,2264, 719,2951,2724,3834, 870,1832,1644,1000, # 3840
- 839,2474,3717, 197,1630,3394, 365,2886,3964,1285,2133, 734, 922, 818,1106, 732, # 3856
- 480,2083,1774,3458, 923,2279,1350, 221,3086,  85,2233,2234,3835,1585,3010,2147, # 3872
-1387,1705,2382,1619,2475, 133, 239,2802,1991,1016,2084,2383, 411,2838,1113, 651, # 3888
-1985,1160,3328, 990,1863,3087,1048,1276,2647, 265,2627,1599,3253,2056, 150, 638, # 3904
-2019, 656, 853, 326,1479, 680,1439,4354,1001,1759, 413,3459,3395,2492,1431, 459, # 3920
-4355,1125,3329,2265,1953,1450,2065,2863, 849, 351,2678,3131,3254,3255,1104,1577, # 3936
- 227,1351,1645,2453,2193,1421,2887, 812,2121, 634,  95,2435, 201,2312,4665,1646, # 3952
-1671,2743,1601,2554,2702,2648,2280,1315,1366,2089,3132,1573,3718,3965,1729,1189, # 3968
- 328,2679,1077,1940,1136, 558,1283, 964,1195, 621,2074,1199,1743,3460,3619,1896, # 3984
-1916,1890,3836,2952,1154,2112,1064, 862, 378,3011,2066,2113,2803,1568,2839,6178, # 4000
-3088,2919,1941,1660,2004,1992,2194, 142, 707,1590,1708,1624,1922,1023,1836,1233, # 4016
-1004,2313, 789, 741,3620,6179,1609,2411,1200,4127,3719,3720,4666,2057,3721, 593, # 4032
-2840, 367,2920,1878,6180,3461,1521, 628,1168, 692,2211,2649, 300, 720,2067,2571, # 4048
-2953,3396, 959,2504,3966,3539,3462,1977, 701,6181, 954,1043, 800, 681, 183,3722, # 4064
-1803,1730,3540,4128,2103, 815,2314, 174, 467, 230,2454,1093,2134, 755,3541,3397, # 4080
-1141,1162,6182,1738,2039, 270,3256,2513,1005,1647,2185,3837, 858,1679,1897,1719, # 4096
-2954,2324,1806, 402, 670, 167,4129,1498,2158,2104, 750,6183, 915, 189,1680,1551, # 4112
- 455,4356,1501,2455, 405,1095,2955, 338,1586,1266,1819, 570, 641,1324, 237,1556, # 4128
-2650,1388,3723,6184,1368,2384,1343,1978,3089,2436, 879,3724, 792,1191, 758,3012, # 4144
-1411,2135,1322,4357, 240,4667,1848,3725,1574,6185, 420,3045,1546,1391, 714,4358, # 4160
-1967, 941,1864, 863, 664, 426, 560,1731,2680,1785,2864,1949,2363, 403,3330,1415, # 4176
-1279,2136,1697,2335, 204, 721,2097,3838,  90,6186,2085,2505, 191,3967, 124,2148, # 4192
-1376,1798,1178,1107,1898,1405, 860,4359,1243,1272,2375,2983,1558,2456,1638, 113, # 4208
-3621, 578,1923,2609, 880, 386,4130, 784,2186,2266,1422,2956,2172,1722, 497, 263, # 4224
-2514,1267,2412,2610, 177,2703,3542, 774,1927,1344, 616,1432,1595,1018, 172,4360, # 4240
-2325, 911,4361, 438,1468,3622, 794,3968,2024,2173,1681,1829,2957, 945, 895,3090, # 4256
- 575,2212,2476, 475,2401,2681, 785,2744,1745,2293,2555,1975,3133,2865, 394,4668, # 4272
-3839, 635,4131, 639, 202,1507,2195,2766,1345,1435,2572,3726,1908,1184,1181,2457, # 4288
-3727,3134,4362, 843,2611, 437, 916,4669, 234, 769,1884,3046,3047,3623, 833,6187, # 4304
-1639,2250,2402,1355,1185,2010,2047, 999, 525,1732,1290,1488,2612, 948,1578,3728, # 4320
-2413,2477,1216,2725,2159, 334,3840,1328,3624,2921,1525,4132, 564,1056, 891,4363, # 4336
-1444,1698,2385,2251,3729,1365,2281,2235,1717,6188, 864,3841,2515, 444, 527,2767, # 4352
-2922,3625, 544, 461,6189, 566, 209,2437,3398,2098,1065,2068,3331,3626,3257,2137, # 4368  #last 512
-)
-
-
diff --git a/venv/lib/python3.7/site-packages/chardet/jpcntx.py b/venv/lib/python3.7/site-packages/chardet/jpcntx.py
deleted file mode 100644
index 20044e4..0000000
--- a/venv/lib/python3.7/site-packages/chardet/jpcntx.py
+++ /dev/null
@@ -1,233 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-
-# This is hiragana 2-char sequence table, the number in each cell represents its frequency category
-jp2CharContext = (
-(0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1),
-(2,4,0,4,0,3,0,4,0,3,4,4,4,2,4,3,3,4,3,2,3,3,4,2,3,3,3,2,4,1,4,3,3,1,5,4,3,4,3,4,3,5,3,0,3,5,4,2,0,3,1,0,3,3,0,3,3,0,1,1,0,4,3,0,3,3,0,4,0,2,0,3,5,5,5,5,4,0,4,1,0,3,4),
-(0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2),
-(0,4,0,5,0,5,0,4,0,4,5,4,4,3,5,3,5,1,5,3,4,3,4,4,3,4,3,3,4,3,5,4,4,3,5,5,3,5,5,5,3,5,5,3,4,5,5,3,1,3,2,0,3,4,0,4,2,0,4,2,1,5,3,2,3,5,0,4,0,2,0,5,4,4,5,4,5,0,4,0,0,4,4),
-(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0),
-(0,3,0,4,0,3,0,3,0,4,5,4,3,3,3,3,4,3,5,4,4,3,5,4,4,3,4,3,4,4,4,4,5,3,4,4,3,4,5,5,4,5,5,1,4,5,4,3,0,3,3,1,3,3,0,4,4,0,3,3,1,5,3,3,3,5,0,4,0,3,0,4,4,3,4,3,3,0,4,1,1,3,4),
-(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0),
-(0,4,0,3,0,3,0,4,0,3,4,4,3,2,2,1,2,1,3,1,3,3,3,3,3,4,3,1,3,3,5,3,3,0,4,3,0,5,4,3,3,5,4,4,3,4,4,5,0,1,2,0,1,2,0,2,2,0,1,0,0,5,2,2,1,4,0,3,0,1,0,4,4,3,5,4,3,0,2,1,0,4,3),
-(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0),
-(0,3,0,5,0,4,0,2,1,4,4,2,4,1,4,2,4,2,4,3,3,3,4,3,3,3,3,1,4,2,3,3,3,1,4,4,1,1,1,4,3,3,2,0,2,4,3,2,0,3,3,0,3,1,1,0,0,0,3,3,0,4,2,2,3,4,0,4,0,3,0,4,4,5,3,4,4,0,3,0,0,1,4),
-(1,4,0,4,0,4,0,4,0,3,5,4,4,3,4,3,5,4,3,3,4,3,5,4,4,4,4,3,4,2,4,3,3,1,5,4,3,2,4,5,4,5,5,4,4,5,4,4,0,3,2,2,3,3,0,4,3,1,3,2,1,4,3,3,4,5,0,3,0,2,0,4,5,5,4,5,4,0,4,0,0,5,4),
-(0,5,0,5,0,4,0,3,0,4,4,3,4,3,3,3,4,0,4,4,4,3,4,3,4,3,3,1,4,2,4,3,4,0,5,4,1,4,5,4,4,5,3,2,4,3,4,3,2,4,1,3,3,3,2,3,2,0,4,3,3,4,3,3,3,4,0,4,0,3,0,4,5,4,4,4,3,0,4,1,0,1,3),
-(0,3,1,4,0,3,0,2,0,3,4,4,3,1,4,2,3,3,4,3,4,3,4,3,4,4,3,2,3,1,5,4,4,1,4,4,3,5,4,4,3,5,5,4,3,4,4,3,1,2,3,1,2,2,0,3,2,0,3,1,0,5,3,3,3,4,3,3,3,3,4,4,4,4,5,4,2,0,3,3,2,4,3),
-(0,2,0,3,0,1,0,1,0,0,3,2,0,0,2,0,1,0,2,1,3,3,3,1,2,3,1,0,1,0,4,2,1,1,3,3,0,4,3,3,1,4,3,3,0,3,3,2,0,0,0,0,1,0,0,2,0,0,0,0,0,4,1,0,2,3,2,2,2,1,3,3,3,4,4,3,2,0,3,1,0,3,3),
-(0,4,0,4,0,3,0,3,0,4,4,4,3,3,3,3,3,3,4,3,4,2,4,3,4,3,3,2,4,3,4,5,4,1,4,5,3,5,4,5,3,5,4,0,3,5,5,3,1,3,3,2,2,3,0,3,4,1,3,3,2,4,3,3,3,4,0,4,0,3,0,4,5,4,4,5,3,0,4,1,0,3,4),
-(0,2,0,3,0,3,0,0,0,2,2,2,1,0,1,0,0,0,3,0,3,0,3,0,1,3,1,0,3,1,3,3,3,1,3,3,3,0,1,3,1,3,4,0,0,3,1,1,0,3,2,0,0,0,0,1,3,0,1,0,0,3,3,2,0,3,0,0,0,0,0,3,4,3,4,3,3,0,3,0,0,2,3),
-(2,3,0,3,0,2,0,1,0,3,3,4,3,1,3,1,1,1,3,1,4,3,4,3,3,3,0,0,3,1,5,4,3,1,4,3,2,5,5,4,4,4,4,3,3,4,4,4,0,2,1,1,3,2,0,1,2,0,0,1,0,4,1,3,3,3,0,3,0,1,0,4,4,4,5,5,3,0,2,0,0,4,4),
-(0,2,0,1,0,3,1,3,0,2,3,3,3,0,3,1,0,0,3,0,3,2,3,1,3,2,1,1,0,0,4,2,1,0,2,3,1,4,3,2,0,4,4,3,1,3,1,3,0,1,0,0,1,0,0,0,1,0,0,0,0,4,1,1,1,2,0,3,0,0,0,3,4,2,4,3,2,0,1,0,0,3,3),
-(0,1,0,4,0,5,0,4,0,2,4,4,2,3,3,2,3,3,5,3,3,3,4,3,4,2,3,0,4,3,3,3,4,1,4,3,2,1,5,5,3,4,5,1,3,5,4,2,0,3,3,0,1,3,0,4,2,0,1,3,1,4,3,3,3,3,0,3,0,1,0,3,4,4,4,5,5,0,3,0,1,4,5),
-(0,2,0,3,0,3,0,0,0,2,3,1,3,0,4,0,1,1,3,0,3,4,3,2,3,1,0,3,3,2,3,1,3,0,2,3,0,2,1,4,1,2,2,0,0,3,3,0,0,2,0,0,0,1,0,0,0,0,2,2,0,3,2,1,3,3,0,2,0,2,0,0,3,3,1,2,4,0,3,0,2,2,3),
-(2,4,0,5,0,4,0,4,0,2,4,4,4,3,4,3,3,3,1,2,4,3,4,3,4,4,5,0,3,3,3,3,2,0,4,3,1,4,3,4,1,4,4,3,3,4,4,3,1,2,3,0,4,2,0,4,1,0,3,3,0,4,3,3,3,4,0,4,0,2,0,3,5,3,4,5,2,0,3,0,0,4,5),
-(0,3,0,4,0,1,0,1,0,1,3,2,2,1,3,0,3,0,2,0,2,0,3,0,2,0,0,0,1,0,1,1,0,0,3,1,0,0,0,4,0,3,1,0,2,1,3,0,0,0,0,0,0,3,0,0,0,0,0,0,0,4,2,2,3,1,0,3,0,0,0,1,4,4,4,3,0,0,4,0,0,1,4),
-(1,4,1,5,0,3,0,3,0,4,5,4,4,3,5,3,3,4,4,3,4,1,3,3,3,3,2,1,4,1,5,4,3,1,4,4,3,5,4,4,3,5,4,3,3,4,4,4,0,3,3,1,2,3,0,3,1,0,3,3,0,5,4,4,4,4,4,4,3,3,5,4,4,3,3,5,4,0,3,2,0,4,4),
-(0,2,0,3,0,1,0,0,0,1,3,3,3,2,4,1,3,0,3,1,3,0,2,2,1,1,0,0,2,0,4,3,1,0,4,3,0,4,4,4,1,4,3,1,1,3,3,1,0,2,0,0,1,3,0,0,0,0,2,0,0,4,3,2,4,3,5,4,3,3,3,4,3,3,4,3,3,0,2,1,0,3,3),
-(0,2,0,4,0,3,0,2,0,2,5,5,3,4,4,4,4,1,4,3,3,0,4,3,4,3,1,3,3,2,4,3,0,3,4,3,0,3,4,4,2,4,4,0,4,5,3,3,2,2,1,1,1,2,0,1,5,0,3,3,2,4,3,3,3,4,0,3,0,2,0,4,4,3,5,5,0,0,3,0,2,3,3),
-(0,3,0,4,0,3,0,1,0,3,4,3,3,1,3,3,3,0,3,1,3,0,4,3,3,1,1,0,3,0,3,3,0,0,4,4,0,1,5,4,3,3,5,0,3,3,4,3,0,2,0,1,1,1,0,1,3,0,1,2,1,3,3,2,3,3,0,3,0,1,0,1,3,3,4,4,1,0,1,2,2,1,3),
-(0,1,0,4,0,4,0,3,0,1,3,3,3,2,3,1,1,0,3,0,3,3,4,3,2,4,2,0,1,0,4,3,2,0,4,3,0,5,3,3,2,4,4,4,3,3,3,4,0,1,3,0,0,1,0,0,1,0,0,0,0,4,2,3,3,3,0,3,0,0,0,4,4,4,5,3,2,0,3,3,0,3,5),
-(0,2,0,3,0,0,0,3,0,1,3,0,2,0,0,0,1,0,3,1,1,3,3,0,0,3,0,0,3,0,2,3,1,0,3,1,0,3,3,2,0,4,2,2,0,2,0,0,0,4,0,0,0,0,0,0,0,0,0,0,0,2,1,2,0,1,0,1,0,0,0,1,3,1,2,0,0,0,1,0,0,1,4),
-(0,3,0,3,0,5,0,1,0,2,4,3,1,3,3,2,1,1,5,2,1,0,5,1,2,0,0,0,3,3,2,2,3,2,4,3,0,0,3,3,1,3,3,0,2,5,3,4,0,3,3,0,1,2,0,2,2,0,3,2,0,2,2,3,3,3,0,2,0,1,0,3,4,4,2,5,4,0,3,0,0,3,5),
-(0,3,0,3,0,3,0,1,0,3,3,3,3,0,3,0,2,0,2,1,1,0,2,0,1,0,0,0,2,1,0,0,1,0,3,2,0,0,3,3,1,2,3,1,0,3,3,0,0,1,0,0,0,0,0,2,0,0,0,0,0,2,3,1,2,3,0,3,0,1,0,3,2,1,0,4,3,0,1,1,0,3,3),
-(0,4,0,5,0,3,0,3,0,4,5,5,4,3,5,3,4,3,5,3,3,2,5,3,4,4,4,3,4,3,4,5,5,3,4,4,3,4,4,5,4,4,4,3,4,5,5,4,2,3,4,2,3,4,0,3,3,1,4,3,2,4,3,3,5,5,0,3,0,3,0,5,5,5,5,4,4,0,4,0,1,4,4),
-(0,4,0,4,0,3,0,3,0,3,5,4,4,2,3,2,5,1,3,2,5,1,4,2,3,2,3,3,4,3,3,3,3,2,5,4,1,3,3,5,3,4,4,0,4,4,3,1,1,3,1,0,2,3,0,2,3,0,3,0,0,4,3,1,3,4,0,3,0,2,0,4,4,4,3,4,5,0,4,0,0,3,4),
-(0,3,0,3,0,3,1,2,0,3,4,4,3,3,3,0,2,2,4,3,3,1,3,3,3,1,1,0,3,1,4,3,2,3,4,4,2,4,4,4,3,4,4,3,2,4,4,3,1,3,3,1,3,3,0,4,1,0,2,2,1,4,3,2,3,3,5,4,3,3,5,4,4,3,3,0,4,0,3,2,2,4,4),
-(0,2,0,1,0,0,0,0,0,1,2,1,3,0,0,0,0,0,2,0,1,2,1,0,0,1,0,0,0,0,3,0,0,1,0,1,1,3,1,0,0,0,1,1,0,1,1,0,0,0,0,0,2,0,0,0,0,0,0,0,0,1,1,2,2,0,3,4,0,0,0,1,1,0,0,1,0,0,0,0,0,1,1),
-(0,1,0,0,0,1,0,0,0,0,4,0,4,1,4,0,3,0,4,0,3,0,4,0,3,0,3,0,4,1,5,1,4,0,0,3,0,5,0,5,2,0,1,0,0,0,2,1,4,0,1,3,0,0,3,0,0,3,1,1,4,1,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0),
-(1,4,0,5,0,3,0,2,0,3,5,4,4,3,4,3,5,3,4,3,3,0,4,3,3,3,3,3,3,2,4,4,3,1,3,4,4,5,4,4,3,4,4,1,3,5,4,3,3,3,1,2,2,3,3,1,3,1,3,3,3,5,3,3,4,5,0,3,0,3,0,3,4,3,4,4,3,0,3,0,2,4,3),
-(0,1,0,4,0,0,0,0,0,1,4,0,4,1,4,2,4,0,3,0,1,0,1,0,0,0,0,0,2,0,3,1,1,1,0,3,0,0,0,1,2,1,0,0,1,1,1,1,0,1,0,0,0,1,0,0,3,0,0,0,0,3,2,0,2,2,0,1,0,0,0,2,3,2,3,3,0,0,0,0,2,1,0),
-(0,5,1,5,0,3,0,3,0,5,4,4,5,1,5,3,3,0,4,3,4,3,5,3,4,3,3,2,4,3,4,3,3,0,3,3,1,4,4,3,4,4,4,3,4,5,5,3,2,3,1,1,3,3,1,3,1,1,3,3,2,4,5,3,3,5,0,4,0,3,0,4,4,3,5,3,3,0,3,4,0,4,3),
-(0,5,0,5,0,3,0,2,0,4,4,3,5,2,4,3,3,3,4,4,4,3,5,3,5,3,3,1,4,0,4,3,3,0,3,3,0,4,4,4,4,5,4,3,3,5,5,3,2,3,1,2,3,2,0,1,0,0,3,2,2,4,4,3,1,5,0,4,0,3,0,4,3,1,3,2,1,0,3,3,0,3,3),
-(0,4,0,5,0,5,0,4,0,4,5,5,5,3,4,3,3,2,5,4,4,3,5,3,5,3,4,0,4,3,4,4,3,2,4,4,3,4,5,4,4,5,5,0,3,5,5,4,1,3,3,2,3,3,1,3,1,0,4,3,1,4,4,3,4,5,0,4,0,2,0,4,3,4,4,3,3,0,4,0,0,5,5),
-(0,4,0,4,0,5,0,1,1,3,3,4,4,3,4,1,3,0,5,1,3,0,3,1,3,1,1,0,3,0,3,3,4,0,4,3,0,4,4,4,3,4,4,0,3,5,4,1,0,3,0,0,2,3,0,3,1,0,3,1,0,3,2,1,3,5,0,3,0,1,0,3,2,3,3,4,4,0,2,2,0,4,4),
-(2,4,0,5,0,4,0,3,0,4,5,5,4,3,5,3,5,3,5,3,5,2,5,3,4,3,3,4,3,4,5,3,2,1,5,4,3,2,3,4,5,3,4,1,2,5,4,3,0,3,3,0,3,2,0,2,3,0,4,1,0,3,4,3,3,5,0,3,0,1,0,4,5,5,5,4,3,0,4,2,0,3,5),
-(0,5,0,4,0,4,0,2,0,5,4,3,4,3,4,3,3,3,4,3,4,2,5,3,5,3,4,1,4,3,4,4,4,0,3,5,0,4,4,4,4,5,3,1,3,4,5,3,3,3,3,3,3,3,0,2,2,0,3,3,2,4,3,3,3,5,3,4,1,3,3,5,3,2,0,0,0,0,4,3,1,3,3),
-(0,1,0,3,0,3,0,1,0,1,3,3,3,2,3,3,3,0,3,0,0,0,3,1,3,0,0,0,2,2,2,3,0,0,3,2,0,1,2,4,1,3,3,0,0,3,3,3,0,1,0,0,2,1,0,0,3,0,3,1,0,3,0,0,1,3,0,2,0,1,0,3,3,1,3,3,0,0,1,1,0,3,3),
-(0,2,0,3,0,2,1,4,0,2,2,3,1,1,3,1,1,0,2,0,3,1,2,3,1,3,0,0,1,0,4,3,2,3,3,3,1,4,2,3,3,3,3,1,0,3,1,4,0,1,1,0,1,2,0,1,1,0,1,1,0,3,1,3,2,2,0,1,0,0,0,2,3,3,3,1,0,0,0,0,0,2,3),
-(0,5,0,4,0,5,0,2,0,4,5,5,3,3,4,3,3,1,5,4,4,2,4,4,4,3,4,2,4,3,5,5,4,3,3,4,3,3,5,5,4,5,5,1,3,4,5,3,1,4,3,1,3,3,0,3,3,1,4,3,1,4,5,3,3,5,0,4,0,3,0,5,3,3,1,4,3,0,4,0,1,5,3),
-(0,5,0,5,0,4,0,2,0,4,4,3,4,3,3,3,3,3,5,4,4,4,4,4,4,5,3,3,5,2,4,4,4,3,4,4,3,3,4,4,5,5,3,3,4,3,4,3,3,4,3,3,3,3,1,2,2,1,4,3,3,5,4,4,3,4,0,4,0,3,0,4,4,4,4,4,1,0,4,2,0,2,4),
-(0,4,0,4,0,3,0,1,0,3,5,2,3,0,3,0,2,1,4,2,3,3,4,1,4,3,3,2,4,1,3,3,3,0,3,3,0,0,3,3,3,5,3,3,3,3,3,2,0,2,0,0,2,0,0,2,0,0,1,0,0,3,1,2,2,3,0,3,0,2,0,4,4,3,3,4,1,0,3,0,0,2,4),
-(0,0,0,4,0,0,0,0,0,0,1,0,1,0,2,0,0,0,0,0,1,0,2,0,1,0,0,0,0,0,3,1,3,0,3,2,0,0,0,1,0,3,2,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,4,0,2,0,0,0,0,0,0,2),
-(0,2,1,3,0,2,0,2,0,3,3,3,3,1,3,1,3,3,3,3,3,3,4,2,2,1,2,1,4,0,4,3,1,3,3,3,2,4,3,5,4,3,3,3,3,3,3,3,0,1,3,0,2,0,0,1,0,0,1,0,0,4,2,0,2,3,0,3,3,0,3,3,4,2,3,1,4,0,1,2,0,2,3),
-(0,3,0,3,0,1,0,3,0,2,3,3,3,0,3,1,2,0,3,3,2,3,3,2,3,2,3,1,3,0,4,3,2,0,3,3,1,4,3,3,2,3,4,3,1,3,3,1,1,0,1,1,0,1,0,1,0,1,0,0,0,4,1,1,0,3,0,3,1,0,2,3,3,3,3,3,1,0,0,2,0,3,3),
-(0,0,0,0,0,0,0,0,0,0,3,0,2,0,3,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,3,0,3,0,3,1,0,1,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,0,2,0,2,3,0,0,0,0,0,0,0,0,3),
-(0,2,0,3,1,3,0,3,0,2,3,3,3,1,3,1,3,1,3,1,3,3,3,1,3,0,2,3,1,1,4,3,3,2,3,3,1,2,2,4,1,3,3,0,1,4,2,3,0,1,3,0,3,0,0,1,3,0,2,0,0,3,3,2,1,3,0,3,0,2,0,3,4,4,4,3,1,0,3,0,0,3,3),
-(0,2,0,1,0,2,0,0,0,1,3,2,2,1,3,0,1,1,3,0,3,2,3,1,2,0,2,0,1,1,3,3,3,0,3,3,1,1,2,3,2,3,3,1,2,3,2,0,0,1,0,0,0,0,0,0,3,0,1,0,0,2,1,2,1,3,0,3,0,0,0,3,4,4,4,3,2,0,2,0,0,2,4),
-(0,0,0,1,0,1,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,0,0,2,2,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,1,3,1,0,0,0,0,0,0,0,3),
-(0,3,0,3,0,2,0,3,0,3,3,3,2,3,2,2,2,0,3,1,3,3,3,2,3,3,0,0,3,0,3,2,2,0,2,3,1,4,3,4,3,3,2,3,1,5,4,4,0,3,1,2,1,3,0,3,1,1,2,0,2,3,1,3,1,3,0,3,0,1,0,3,3,4,4,2,1,0,2,1,0,2,4),
-(0,1,0,3,0,1,0,2,0,1,4,2,5,1,4,0,2,0,2,1,3,1,4,0,2,1,0,0,2,1,4,1,1,0,3,3,0,5,1,3,2,3,3,1,0,3,2,3,0,1,0,0,0,0,0,0,1,0,0,0,0,4,0,1,0,3,0,2,0,1,0,3,3,3,4,3,3,0,0,0,0,2,3),
-(0,0,0,1,0,0,0,0,0,0,2,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,1,0,0,1,0,0,0,0,0,3),
-(0,1,0,3,0,4,0,3,0,2,4,3,1,0,3,2,2,1,3,1,2,2,3,1,1,1,2,1,3,0,1,2,0,1,3,2,1,3,0,5,5,1,0,0,1,3,2,1,0,3,0,0,1,0,0,0,0,0,3,4,0,1,1,1,3,2,0,2,0,1,0,2,3,3,1,2,3,0,1,0,1,0,4),
-(0,0,0,1,0,3,0,3,0,2,2,1,0,0,4,0,3,0,3,1,3,0,3,0,3,0,1,0,3,0,3,1,3,0,3,3,0,0,1,2,1,1,1,0,1,2,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,2,2,1,2,0,0,2,0,0,0,0,2,3,3,3,3,0,0,0,0,1,4),
-(0,0,0,3,0,3,0,0,0,0,3,1,1,0,3,0,1,0,2,0,1,0,0,0,0,0,0,0,1,0,3,0,2,0,2,3,0,0,2,2,3,1,2,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,0,0,2,0,0,0,0,2,3),
-(2,4,0,5,0,5,0,4,0,3,4,3,3,3,4,3,3,3,4,3,4,4,5,4,5,5,5,2,3,0,5,5,4,1,5,4,3,1,5,4,3,4,4,3,3,4,3,3,0,3,2,0,2,3,0,3,0,0,3,3,0,5,3,2,3,3,0,3,0,3,0,3,4,5,4,5,3,0,4,3,0,3,4),
-(0,3,0,3,0,3,0,3,0,3,3,4,3,2,3,2,3,0,4,3,3,3,3,3,3,3,3,0,3,2,4,3,3,1,3,4,3,4,4,4,3,4,4,3,2,4,4,1,0,2,0,0,1,1,0,2,0,0,3,1,0,5,3,2,1,3,0,3,0,1,2,4,3,2,4,3,3,0,3,2,0,4,4),
-(0,3,0,3,0,1,0,0,0,1,4,3,3,2,3,1,3,1,4,2,3,2,4,2,3,4,3,0,2,2,3,3,3,0,3,3,3,0,3,4,1,3,3,0,3,4,3,3,0,1,1,0,1,0,0,0,4,0,3,0,0,3,1,2,1,3,0,4,0,1,0,4,3,3,4,3,3,0,2,0,0,3,3),
-(0,3,0,4,0,1,0,3,0,3,4,3,3,0,3,3,3,1,3,1,3,3,4,3,3,3,0,0,3,1,5,3,3,1,3,3,2,5,4,3,3,4,5,3,2,5,3,4,0,1,0,0,0,0,0,2,0,0,1,1,0,4,2,2,1,3,0,3,0,2,0,4,4,3,5,3,2,0,1,1,0,3,4),
-(0,5,0,4,0,5,0,2,0,4,4,3,3,2,3,3,3,1,4,3,4,1,5,3,4,3,4,0,4,2,4,3,4,1,5,4,0,4,4,4,4,5,4,1,3,5,4,2,1,4,1,1,3,2,0,3,1,0,3,2,1,4,3,3,3,4,0,4,0,3,0,4,4,4,3,3,3,0,4,2,0,3,4),
-(1,4,0,4,0,3,0,1,0,3,3,3,1,1,3,3,2,2,3,3,1,0,3,2,2,1,2,0,3,1,2,1,2,0,3,2,0,2,2,3,3,4,3,0,3,3,1,2,0,1,1,3,1,2,0,0,3,0,1,1,0,3,2,2,3,3,0,3,0,0,0,2,3,3,4,3,3,0,1,0,0,1,4),
-(0,4,0,4,0,4,0,0,0,3,4,4,3,1,4,2,3,2,3,3,3,1,4,3,4,0,3,0,4,2,3,3,2,2,5,4,2,1,3,4,3,4,3,1,3,3,4,2,0,2,1,0,3,3,0,0,2,0,3,1,0,4,4,3,4,3,0,4,0,1,0,2,4,4,4,4,4,0,3,2,0,3,3),
-(0,0,0,1,0,4,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,3,2,0,0,1,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,2),
-(0,2,0,3,0,4,0,4,0,1,3,3,3,0,4,0,2,1,2,1,1,1,2,0,3,1,1,0,1,0,3,1,0,0,3,3,2,0,1,1,0,0,0,0,0,1,0,2,0,2,2,0,3,1,0,0,1,0,1,1,0,1,2,0,3,0,0,0,0,1,0,0,3,3,4,3,1,0,1,0,3,0,2),
-(0,0,0,3,0,5,0,0,0,0,1,0,2,0,3,1,0,1,3,0,0,0,2,0,0,0,1,0,0,0,1,1,0,0,4,0,0,0,2,3,0,1,4,1,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,1,0,0,0,0,0,0,0,2,0,0,3,0,0,0,0,0,3),
-(0,2,0,5,0,5,0,1,0,2,4,3,3,2,5,1,3,2,3,3,3,0,4,1,2,0,3,0,4,0,2,2,1,1,5,3,0,0,1,4,2,3,2,0,3,3,3,2,0,2,4,1,1,2,0,1,1,0,3,1,0,1,3,1,2,3,0,2,0,0,0,1,3,5,4,4,4,0,3,0,0,1,3),
-(0,4,0,5,0,4,0,4,0,4,5,4,3,3,4,3,3,3,4,3,4,4,5,3,4,5,4,2,4,2,3,4,3,1,4,4,1,3,5,4,4,5,5,4,4,5,5,5,2,3,3,1,4,3,1,3,3,0,3,3,1,4,3,4,4,4,0,3,0,4,0,3,3,4,4,5,0,0,4,3,0,4,5),
-(0,4,0,4,0,3,0,3,0,3,4,4,4,3,3,2,4,3,4,3,4,3,5,3,4,3,2,1,4,2,4,4,3,1,3,4,2,4,5,5,3,4,5,4,1,5,4,3,0,3,2,2,3,2,1,3,1,0,3,3,3,5,3,3,3,5,4,4,2,3,3,4,3,3,3,2,1,0,3,2,1,4,3),
-(0,4,0,5,0,4,0,3,0,3,5,5,3,2,4,3,4,0,5,4,4,1,4,4,4,3,3,3,4,3,5,5,2,3,3,4,1,2,5,5,3,5,5,2,3,5,5,4,0,3,2,0,3,3,1,1,5,1,4,1,0,4,3,2,3,5,0,4,0,3,0,5,4,3,4,3,0,0,4,1,0,4,4),
-(1,3,0,4,0,2,0,2,0,2,5,5,3,3,3,3,3,0,4,2,3,4,4,4,3,4,0,0,3,4,5,4,3,3,3,3,2,5,5,4,5,5,5,4,3,5,5,5,1,3,1,0,1,0,0,3,2,0,4,2,0,5,2,3,2,4,1,3,0,3,0,4,5,4,5,4,3,0,4,2,0,5,4),
-(0,3,0,4,0,5,0,3,0,3,4,4,3,2,3,2,3,3,3,3,3,2,4,3,3,2,2,0,3,3,3,3,3,1,3,3,3,0,4,4,3,4,4,1,1,4,4,2,0,3,1,0,1,1,0,4,1,0,2,3,1,3,3,1,3,4,0,3,0,1,0,3,1,3,0,0,1,0,2,0,0,4,4),
-(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0),
-(0,3,0,3,0,2,0,3,0,1,5,4,3,3,3,1,4,2,1,2,3,4,4,2,4,4,5,0,3,1,4,3,4,0,4,3,3,3,2,3,2,5,3,4,3,2,2,3,0,0,3,0,2,1,0,1,2,0,0,0,0,2,1,1,3,1,0,2,0,4,0,3,4,4,4,5,2,0,2,0,0,1,3),
-(0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,1,1,0,0,1,1,0,0,0,4,2,1,1,0,1,0,3,2,0,0,3,1,1,1,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,0,1,0,0,0,2,0,0,0,1,4,0,4,2,1,0,0,0,0,0,1),
-(0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,0,1,0,0,0,0,0,0,1,0,1,0,0,0,0,3,1,0,0,0,2,0,2,1,0,0,1,2,1,0,1,1,0,0,3,0,0,0,0,0,0,0,0,0,0,0,1,3,1,0,0,0,0,0,1,0,0,2,1,0,0,0,0,0,0,0,0,2),
-(0,4,0,4,0,4,0,3,0,4,4,3,4,2,4,3,2,0,4,4,4,3,5,3,5,3,3,2,4,2,4,3,4,3,1,4,0,2,3,4,4,4,3,3,3,4,4,4,3,4,1,3,4,3,2,1,2,1,3,3,3,4,4,3,3,5,0,4,0,3,0,4,3,3,3,2,1,0,3,0,0,3,3),
-(0,4,0,3,0,3,0,3,0,3,5,5,3,3,3,3,4,3,4,3,3,3,4,4,4,3,3,3,3,4,3,5,3,3,1,3,2,4,5,5,5,5,4,3,4,5,5,3,2,2,3,3,3,3,2,3,3,1,2,3,2,4,3,3,3,4,0,4,0,2,0,4,3,2,2,1,2,0,3,0,0,4,1),
-)
-
-class JapaneseContextAnalysis(object):
-    NUM_OF_CATEGORY = 6
-    DONT_KNOW = -1
-    ENOUGH_REL_THRESHOLD = 100
-    MAX_REL_THRESHOLD = 1000
-    MINIMUM_DATA_THRESHOLD = 4
-
-    def __init__(self):
-        self._total_rel = None
-        self._rel_sample = None
-        self._need_to_skip_char_num = None
-        self._last_char_order = None
-        self._done = None
-        self.reset()
-
-    def reset(self):
-        self._total_rel = 0  # total sequence received
-        # category counters, each integer counts sequence in its category
-        self._rel_sample = [0] * self.NUM_OF_CATEGORY
-        # if last byte in current buffer is not the last byte of a character,
-        # we need to know how many bytes to skip in next buffer
-        self._need_to_skip_char_num = 0
-        self._last_char_order = -1  # The order of previous char
-        # If this flag is set to True, detection is done and conclusion has
-        # been made
-        self._done = False
-
-    def feed(self, byte_str, num_bytes):
-        if self._done:
-            return
-
-        # The buffer we got is byte oriented, and a character may span in more than one
-        # buffers. In case the last one or two byte in last buffer is not
-        # complete, we record how many byte needed to complete that character
-        # and skip these bytes here.  We can choose to record those bytes as
-        # well and analyse the character once it is complete, but since a
-        # character will not make much difference, by simply skipping
-        # this character will simply our logic and improve performance.
-        i = self._need_to_skip_char_num
-        while i < num_bytes:
-            order, char_len = self.get_order(byte_str[i:i + 2])
-            i += char_len
-            if i > num_bytes:
-                self._need_to_skip_char_num = i - num_bytes
-                self._last_char_order = -1
-            else:
-                if (order != -1) and (self._last_char_order != -1):
-                    self._total_rel += 1
-                    if self._total_rel > self.MAX_REL_THRESHOLD:
-                        self._done = True
-                        break
-                    self._rel_sample[jp2CharContext[self._last_char_order][order]] += 1
-                self._last_char_order = order
-
-    def got_enough_data(self):
-        return self._total_rel > self.ENOUGH_REL_THRESHOLD
-
-    def get_confidence(self):
-        # This is just one way to calculate confidence. It works well for me.
-        if self._total_rel > self.MINIMUM_DATA_THRESHOLD:
-            return (self._total_rel - self._rel_sample[0]) / self._total_rel
-        else:
-            return self.DONT_KNOW
-
-    def get_order(self, byte_str):
-        return -1, 1
-
-class SJISContextAnalysis(JapaneseContextAnalysis):
-    def __init__(self):
-        super(SJISContextAnalysis, self).__init__()
-        self._charset_name = "SHIFT_JIS"
-
-    @property
-    def charset_name(self):
-        return self._charset_name
-
-    def get_order(self, byte_str):
-        if not byte_str:
-            return -1, 1
-        # find out current char's byte length
-        first_char = byte_str[0]
-        if (0x81 <= first_char <= 0x9F) or (0xE0 <= first_char <= 0xFC):
-            char_len = 2
-            if (first_char == 0x87) or (0xFA <= first_char <= 0xFC):
-                self._charset_name = "CP932"
-        else:
-            char_len = 1
-
-        # return its order if it is hiragana
-        if len(byte_str) > 1:
-            second_char = byte_str[1]
-            if (first_char == 202) and (0x9F <= second_char <= 0xF1):
-                return second_char - 0x9F, char_len
-
-        return -1, char_len
-
-class EUCJPContextAnalysis(JapaneseContextAnalysis):
-    def get_order(self, byte_str):
-        if not byte_str:
-            return -1, 1
-        # find out current char's byte length
-        first_char = byte_str[0]
-        if (first_char == 0x8E) or (0xA1 <= first_char <= 0xFE):
-            char_len = 2
-        elif first_char == 0x8F:
-            char_len = 3
-        else:
-            char_len = 1
-
-        # return its order if it is hiragana
-        if len(byte_str) > 1:
-            second_char = byte_str[1]
-            if (first_char == 0xA4) and (0xA1 <= second_char <= 0xF3):
-                return second_char - 0xA1, char_len
-
-        return -1, char_len
-
-
diff --git a/venv/lib/python3.7/site-packages/chardet/langbulgarianmodel.py b/venv/lib/python3.7/site-packages/chardet/langbulgarianmodel.py
deleted file mode 100644
index 2aa4fb2..0000000
--- a/venv/lib/python3.7/site-packages/chardet/langbulgarianmodel.py
+++ /dev/null
@@ -1,228 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-# 255: Control characters that usually does not exist in any text
-# 254: Carriage/Return
-# 253: symbol (punctuation) that does not belong to word
-# 252: 0 - 9
-
-# Character Mapping Table:
-# this table is modified base on win1251BulgarianCharToOrderMap, so
-# only number <64 is sure valid
-
-Latin5_BulgarianCharToOrderMap = (
-255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
-253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
-252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
-253, 77, 90, 99,100, 72,109,107,101, 79,185, 81,102, 76, 94, 82,  # 40
-110,186,108, 91, 74,119, 84, 96,111,187,115,253,253,253,253,253,  # 50
-253, 65, 69, 70, 66, 63, 68,112,103, 92,194,104, 95, 86, 87, 71,  # 60
-116,195, 85, 93, 97,113,196,197,198,199,200,253,253,253,253,253,  # 70
-194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,  # 80
-210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,  # 90
- 81,226,227,228,229,230,105,231,232,233,234,235,236, 45,237,238,  # a0
- 31, 32, 35, 43, 37, 44, 55, 47, 40, 59, 33, 46, 38, 36, 41, 30,  # b0
- 39, 28, 34, 51, 48, 49, 53, 50, 54, 57, 61,239, 67,240, 60, 56,  # c0
-  1, 18,  9, 20, 11,  3, 23, 15,  2, 26, 12, 10, 14,  6,  4, 13,  # d0
-  7,  8,  5, 19, 29, 25, 22, 21, 27, 24, 17, 75, 52,241, 42, 16,  # e0
- 62,242,243,244, 58,245, 98,246,247,248,249,250,251, 91,252,253,  # f0
-)
-
-win1251BulgarianCharToOrderMap = (
-255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
-253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
-252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
-253, 77, 90, 99,100, 72,109,107,101, 79,185, 81,102, 76, 94, 82,  # 40
-110,186,108, 91, 74,119, 84, 96,111,187,115,253,253,253,253,253,  # 50
-253, 65, 69, 70, 66, 63, 68,112,103, 92,194,104, 95, 86, 87, 71,  # 60
-116,195, 85, 93, 97,113,196,197,198,199,200,253,253,253,253,253,  # 70
-206,207,208,209,210,211,212,213,120,214,215,216,217,218,219,220,  # 80
-221, 78, 64, 83,121, 98,117,105,222,223,224,225,226,227,228,229,  # 90
- 88,230,231,232,233,122, 89,106,234,235,236,237,238, 45,239,240,  # a0
- 73, 80,118,114,241,242,243,244,245, 62, 58,246,247,248,249,250,  # b0
- 31, 32, 35, 43, 37, 44, 55, 47, 40, 59, 33, 46, 38, 36, 41, 30,  # c0
- 39, 28, 34, 51, 48, 49, 53, 50, 54, 57, 61,251, 67,252, 60, 56,  # d0
-  1, 18,  9, 20, 11,  3, 23, 15,  2, 26, 12, 10, 14,  6,  4, 13,  # e0
-  7,  8,  5, 19, 29, 25, 22, 21, 27, 24, 17, 75, 52,253, 42, 16,  # f0
-)
-
-# Model Table:
-# total sequences: 100%
-# first 512 sequences: 96.9392%
-# first 1024 sequences:3.0618%
-# rest  sequences:     0.2992%
-# negative sequences:  0.0020%
-BulgarianLangModel = (
-0,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,3,3,3,3,3,3,3,2,3,3,3,3,3,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,0,3,3,3,2,2,3,2,2,1,2,2,
-3,1,3,3,2,3,3,3,3,3,3,3,3,3,3,3,3,0,3,3,3,3,3,3,3,3,3,3,0,3,0,1,
-0,0,0,0,0,0,0,0,0,0,1,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,2,3,3,3,3,3,3,3,3,0,3,1,0,
-0,1,0,0,0,0,0,0,0,0,1,1,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
-3,2,2,2,3,3,3,3,3,3,3,3,3,3,3,3,3,1,3,2,3,3,3,3,3,3,3,3,0,3,0,0,
-0,0,0,0,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,2,3,3,2,3,3,3,3,3,3,3,3,3,3,3,3,1,3,2,3,3,3,3,3,3,3,3,0,3,0,0,
-0,0,0,0,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,3,3,3,2,3,2,2,1,3,3,3,3,2,2,2,1,1,2,0,1,0,1,0,0,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,3,3,3,3,2,3,2,2,3,3,1,1,2,3,3,2,3,3,3,3,2,1,2,0,2,0,3,0,0,
-0,0,0,0,0,0,0,1,0,0,2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,3,3,3,3,1,3,3,3,3,3,2,3,2,3,3,3,3,3,2,3,3,1,3,0,3,0,2,0,0,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,3,3,3,3,3,1,3,3,2,3,3,3,1,3,3,2,3,2,2,2,0,0,2,0,2,0,2,0,0,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,3,3,3,3,3,3,0,3,3,3,2,2,3,3,3,1,2,2,3,2,1,1,2,0,2,0,0,0,0,
-1,0,0,0,0,0,0,0,0,0,2,0,0,1,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,3,3,3,3,2,3,3,1,2,3,2,2,2,3,3,3,3,3,2,2,3,1,2,0,2,1,2,0,0,
-0,0,0,0,0,0,0,0,0,0,3,0,0,1,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,3,3,1,3,3,3,3,3,2,3,3,3,2,3,3,2,3,2,2,2,3,1,2,0,1,0,1,0,0,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,3,3,3,3,3,3,3,3,1,1,1,2,2,1,3,1,3,2,2,3,0,0,1,0,1,0,1,0,0,
-0,0,0,1,0,0,0,0,1,0,2,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,3,3,2,2,3,2,2,3,1,2,1,1,1,2,3,1,3,1,2,2,0,1,1,1,1,0,1,0,0,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,3,3,1,3,2,2,3,3,1,2,3,1,1,3,3,3,3,1,2,2,1,1,1,0,2,0,2,0,1,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,1,2,2,3,3,3,2,2,1,1,2,0,2,0,1,0,0,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
-3,0,1,2,1,3,3,2,3,3,3,3,3,2,3,2,1,0,3,1,2,1,2,1,2,3,2,1,0,1,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,1,1,2,3,3,3,3,3,3,3,3,3,3,3,3,0,0,3,1,3,3,2,3,3,2,2,2,0,1,0,0,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,3,3,3,3,0,3,3,3,3,3,2,1,1,2,1,3,3,0,3,1,1,1,1,3,2,0,1,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
-3,3,2,2,2,3,3,3,3,3,3,3,3,3,3,3,1,1,3,1,3,3,2,3,2,2,2,3,0,2,0,0,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,2,3,3,2,2,3,2,1,1,1,1,1,3,1,3,1,1,0,0,0,1,0,0,0,1,0,0,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,2,3,2,0,3,2,0,3,0,2,0,0,2,1,3,1,0,0,1,0,0,0,1,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,3,2,1,1,1,1,2,1,1,2,1,1,1,2,2,1,2,1,1,1,0,1,1,0,1,0,1,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,3,2,1,3,1,1,2,1,3,2,1,1,0,1,2,3,2,1,1,1,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,3,3,3,3,2,2,1,0,1,0,0,1,0,0,0,2,1,0,3,0,0,1,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,2,3,2,3,3,1,3,2,1,1,1,2,1,1,2,1,3,0,1,0,0,0,1,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,1,1,2,2,3,3,2,3,2,2,2,3,1,2,2,1,1,2,1,1,2,2,0,1,1,0,1,0,2,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,2,1,3,1,0,2,2,1,3,2,1,0,0,2,0,2,0,1,0,0,0,0,0,0,0,1,0,0,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,3,3,3,1,2,0,2,3,1,2,3,2,0,1,3,1,2,1,1,1,0,0,1,0,0,2,2,2,3,
-2,2,2,2,1,2,1,1,2,2,1,1,2,0,1,1,1,0,0,1,1,0,0,1,1,0,0,0,1,1,0,1,
-3,3,3,3,3,2,1,2,2,1,2,0,2,0,1,0,1,2,1,2,1,1,0,0,0,1,0,1,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,1,
-3,3,2,3,3,1,1,3,1,0,3,2,1,0,0,0,1,2,0,2,0,1,0,0,0,1,0,1,2,1,2,2,
-1,1,1,1,1,1,1,2,2,2,1,1,1,1,1,1,1,0,1,2,1,1,1,0,0,0,0,0,1,1,0,0,
-3,1,0,1,0,2,3,2,2,2,3,2,2,2,2,2,1,0,2,1,2,1,1,1,0,1,2,1,2,2,2,1,
-1,1,2,2,2,2,1,2,1,1,0,1,2,1,2,2,2,1,1,1,0,1,1,1,1,2,0,1,0,0,0,0,
-2,3,2,3,3,0,0,2,1,0,2,1,0,0,0,0,2,3,0,2,0,0,0,0,0,1,0,0,2,0,1,2,
-2,1,2,1,2,2,1,1,1,2,1,1,1,0,1,2,2,1,1,1,1,1,0,1,1,1,0,0,1,2,0,0,
-3,3,2,2,3,0,2,3,1,1,2,0,0,0,1,0,0,2,0,2,0,0,0,1,0,1,0,1,2,0,2,2,
-1,1,1,1,2,1,0,1,2,2,2,1,1,1,1,1,1,1,0,1,1,1,0,0,0,0,0,0,1,1,0,0,
-2,3,2,3,3,0,0,3,0,1,1,0,1,0,0,0,2,2,1,2,0,0,0,0,0,0,0,0,2,0,1,2,
-2,2,1,1,1,1,1,2,2,2,1,0,2,0,1,0,1,0,0,1,0,1,0,0,1,0,0,0,0,1,0,0,
-3,3,3,3,2,2,2,2,2,0,2,1,1,1,1,2,1,2,1,1,0,2,0,1,0,1,0,0,2,0,1,2,
-1,1,1,1,1,1,1,2,2,1,1,0,2,0,1,0,2,0,0,1,1,1,0,0,2,0,0,0,1,1,0,0,
-2,3,3,3,3,1,0,0,0,0,0,0,0,0,0,0,2,0,0,1,1,0,0,0,0,0,0,1,2,0,1,2,
-2,2,2,1,1,2,1,1,2,2,2,1,2,0,1,1,1,1,1,1,0,1,1,1,1,0,0,1,1,1,0,0,
-2,3,3,3,3,0,2,2,0,2,1,0,0,0,1,1,1,2,0,2,0,0,0,3,0,0,0,0,2,0,2,2,
-1,1,1,2,1,2,1,1,2,2,2,1,2,0,1,1,1,0,1,1,1,1,0,2,1,0,0,0,1,1,0,0,
-2,3,3,3,3,0,2,1,0,0,2,0,0,0,0,0,1,2,0,2,0,0,0,0,0,0,0,0,2,0,1,2,
-1,1,1,2,1,1,1,1,2,2,2,0,1,0,1,1,1,0,0,1,1,1,0,0,1,0,0,0,0,1,0,0,
-3,3,2,2,3,0,1,0,1,0,0,0,0,0,0,0,1,1,0,3,0,0,0,0,0,0,0,0,1,0,2,2,
-1,1,1,1,1,2,1,1,2,2,1,2,2,1,0,1,1,1,1,1,0,1,0,0,1,0,0,0,1,1,0,0,
-3,1,0,1,0,2,2,2,2,3,2,1,1,1,2,3,0,0,1,0,2,1,1,0,1,1,1,1,2,1,1,1,
-1,2,2,1,2,1,2,2,1,1,0,1,2,1,2,2,1,1,1,0,0,1,1,1,2,1,0,1,0,0,0,0,
-2,1,0,1,0,3,1,2,2,2,2,1,2,2,1,1,1,0,2,1,2,2,1,1,2,1,1,0,2,1,1,1,
-1,2,2,2,2,2,2,2,1,2,0,1,1,0,2,1,1,1,1,1,0,0,1,1,1,1,0,1,0,0,0,0,
-2,1,1,1,1,2,2,2,2,1,2,2,2,1,2,2,1,1,2,1,2,3,2,2,1,1,1,1,0,1,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,2,2,3,2,0,1,2,0,1,2,1,1,0,1,0,1,2,1,2,0,0,0,1,1,0,0,0,1,0,0,2,
-1,1,0,0,1,1,0,1,1,1,1,0,2,0,1,1,1,0,0,1,1,0,0,0,0,1,0,0,0,1,0,0,
-2,0,0,0,0,1,2,2,2,2,2,2,2,1,2,1,1,1,1,1,1,1,0,1,1,1,1,1,2,1,1,1,
-1,2,2,2,2,1,1,2,1,2,1,1,1,0,2,1,2,1,1,1,0,2,1,1,1,1,0,1,0,0,0,0,
-3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,
-1,1,0,1,0,1,1,1,1,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,2,2,3,2,0,0,0,0,1,0,0,0,0,0,0,1,1,0,2,0,0,0,0,0,0,0,0,1,0,1,2,
-1,1,1,1,1,1,0,0,2,2,2,2,2,0,1,1,0,1,1,1,1,1,0,0,1,0,0,0,1,1,0,1,
-2,3,1,2,1,0,1,1,0,2,2,2,0,0,1,0,0,1,1,1,1,0,0,0,0,0,0,0,1,0,1,2,
-1,1,1,1,2,1,1,1,1,1,1,1,1,0,1,1,0,1,0,1,0,1,0,0,1,0,0,0,0,1,0,0,
-2,2,2,2,2,0,0,2,0,0,2,0,0,0,0,0,0,1,0,1,0,0,0,0,0,0,0,0,2,0,2,2,
-1,1,1,1,1,0,0,1,2,1,1,0,1,0,1,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,
-1,2,2,2,2,0,0,2,0,1,1,0,0,0,1,0,0,2,0,2,0,0,0,0,0,0,0,0,0,0,1,1,
-0,0,0,1,1,1,1,1,1,1,1,1,1,0,1,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,
-1,2,2,3,2,0,0,1,0,0,1,0,0,0,0,0,0,1,0,2,0,0,0,1,0,0,0,0,0,0,0,2,
-1,1,0,0,1,0,0,0,1,1,0,0,1,0,1,1,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,
-2,1,2,2,2,1,2,1,2,2,1,1,2,1,1,1,0,1,1,1,1,2,0,1,0,1,1,1,1,0,1,1,
-1,1,2,1,1,1,1,1,1,0,0,1,2,1,1,1,1,1,1,0,0,1,1,1,0,0,0,0,0,0,0,0,
-1,0,0,1,3,1,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,2,2,2,1,0,0,1,0,2,0,0,0,0,0,1,1,1,0,1,0,0,0,0,0,0,0,0,2,0,0,1,
-0,2,0,1,0,0,1,1,2,0,1,0,1,0,1,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,
-1,2,2,2,2,0,1,1,0,2,1,0,1,1,1,0,0,1,0,2,0,1,0,0,0,0,0,0,0,0,0,1,
-0,1,0,0,1,0,0,0,1,1,0,0,1,0,0,1,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,
-2,2,2,2,2,0,0,1,0,0,0,1,0,1,0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,1,
-0,1,0,1,1,1,0,0,1,1,1,0,1,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,
-2,0,1,0,0,1,2,1,1,1,1,1,1,2,2,1,0,0,1,0,1,0,0,0,0,1,1,1,1,0,0,0,
-1,1,2,1,1,1,1,0,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,2,1,2,1,0,0,1,0,0,0,0,0,0,0,0,1,1,0,1,0,0,0,0,0,0,0,0,0,0,0,1,
-0,0,0,0,0,0,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,0,0,1,2,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,
-0,1,1,0,1,1,1,0,0,1,0,0,1,0,1,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,
-1,0,1,0,0,1,1,1,1,1,1,1,1,1,1,1,0,0,1,0,2,0,0,2,0,1,0,0,1,0,0,1,
-1,1,0,0,1,1,0,1,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,
-1,1,1,1,1,1,1,2,0,0,0,0,0,0,2,1,0,1,1,0,0,1,1,1,0,1,0,0,0,0,0,0,
-2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,0,1,1,0,1,1,1,1,1,0,1,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
-)
-
-Latin5BulgarianModel = {
-  'char_to_order_map': Latin5_BulgarianCharToOrderMap,
-  'precedence_matrix': BulgarianLangModel,
-  'typical_positive_ratio': 0.969392,
-  'keep_english_letter': False,
-  'charset_name': "ISO-8859-5",
-  'language': 'Bulgairan',
-}
-
-Win1251BulgarianModel = {
-  'char_to_order_map': win1251BulgarianCharToOrderMap,
-  'precedence_matrix': BulgarianLangModel,
-  'typical_positive_ratio': 0.969392,
-  'keep_english_letter': False,
-  'charset_name': "windows-1251",
-  'language': 'Bulgarian',
-}
diff --git a/venv/lib/python3.7/site-packages/chardet/langcyrillicmodel.py b/venv/lib/python3.7/site-packages/chardet/langcyrillicmodel.py
deleted file mode 100644
index e5f9a1f..0000000
--- a/venv/lib/python3.7/site-packages/chardet/langcyrillicmodel.py
+++ /dev/null
@@ -1,333 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-# KOI8-R language model
-# Character Mapping Table:
-KOI8R_char_to_order_map = (
-255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
-253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
-252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
-253,142,143,144,145,146,147,148,149,150,151,152, 74,153, 75,154,  # 40
-155,156,157,158,159,160,161,162,163,164,165,253,253,253,253,253,  # 50
-253, 71,172, 66,173, 65,174, 76,175, 64,176,177, 77, 72,178, 69,  # 60
- 67,179, 78, 73,180,181, 79,182,183,184,185,253,253,253,253,253,  # 70
-191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,  # 80
-207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,  # 90
-223,224,225, 68,226,227,228,229,230,231,232,233,234,235,236,237,  # a0
-238,239,240,241,242,243,244,245,246,247,248,249,250,251,252,253,  # b0
- 27,  3, 21, 28, 13,  2, 39, 19, 26,  4, 23, 11,  8, 12,  5,  1,  # c0
- 15, 16,  9,  7,  6, 14, 24, 10, 17, 18, 20, 25, 30, 29, 22, 54,  # d0
- 59, 37, 44, 58, 41, 48, 53, 46, 55, 42, 60, 36, 49, 38, 31, 34,  # e0
- 35, 43, 45, 32, 40, 52, 56, 33, 61, 62, 51, 57, 47, 63, 50, 70,  # f0
-)
-
-win1251_char_to_order_map = (
-255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
-253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
-252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
-253,142,143,144,145,146,147,148,149,150,151,152, 74,153, 75,154,  # 40
-155,156,157,158,159,160,161,162,163,164,165,253,253,253,253,253,  # 50
-253, 71,172, 66,173, 65,174, 76,175, 64,176,177, 77, 72,178, 69,  # 60
- 67,179, 78, 73,180,181, 79,182,183,184,185,253,253,253,253,253,  # 70
-191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,
-207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,
-223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,
-239,240,241,242,243,244,245,246, 68,247,248,249,250,251,252,253,
- 37, 44, 33, 46, 41, 48, 56, 51, 42, 60, 36, 49, 38, 31, 34, 35,
- 45, 32, 40, 52, 53, 55, 58, 50, 57, 63, 70, 62, 61, 47, 59, 43,
-  3, 21, 10, 19, 13,  2, 24, 20,  4, 23, 11,  8, 12,  5,  1, 15,
-  9,  7,  6, 14, 39, 26, 28, 22, 25, 29, 54, 18, 17, 30, 27, 16,
-)
-
-latin5_char_to_order_map = (
-255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
-253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
-252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
-253,142,143,144,145,146,147,148,149,150,151,152, 74,153, 75,154,  # 40
-155,156,157,158,159,160,161,162,163,164,165,253,253,253,253,253,  # 50
-253, 71,172, 66,173, 65,174, 76,175, 64,176,177, 77, 72,178, 69,  # 60
- 67,179, 78, 73,180,181, 79,182,183,184,185,253,253,253,253,253,  # 70
-191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,
-207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,
-223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,
- 37, 44, 33, 46, 41, 48, 56, 51, 42, 60, 36, 49, 38, 31, 34, 35,
- 45, 32, 40, 52, 53, 55, 58, 50, 57, 63, 70, 62, 61, 47, 59, 43,
-  3, 21, 10, 19, 13,  2, 24, 20,  4, 23, 11,  8, 12,  5,  1, 15,
-  9,  7,  6, 14, 39, 26, 28, 22, 25, 29, 54, 18, 17, 30, 27, 16,
-239, 68,240,241,242,243,244,245,246,247,248,249,250,251,252,255,
-)
-
-macCyrillic_char_to_order_map = (
-255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
-253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
-252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
-253,142,143,144,145,146,147,148,149,150,151,152, 74,153, 75,154,  # 40
-155,156,157,158,159,160,161,162,163,164,165,253,253,253,253,253,  # 50
-253, 71,172, 66,173, 65,174, 76,175, 64,176,177, 77, 72,178, 69,  # 60
- 67,179, 78, 73,180,181, 79,182,183,184,185,253,253,253,253,253,  # 70
- 37, 44, 33, 46, 41, 48, 56, 51, 42, 60, 36, 49, 38, 31, 34, 35,
- 45, 32, 40, 52, 53, 55, 58, 50, 57, 63, 70, 62, 61, 47, 59, 43,
-191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,
-207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,
-223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,
-239,240,241,242,243,244,245,246,247,248,249,250,251,252, 68, 16,
-  3, 21, 10, 19, 13,  2, 24, 20,  4, 23, 11,  8, 12,  5,  1, 15,
-  9,  7,  6, 14, 39, 26, 28, 22, 25, 29, 54, 18, 17, 30, 27,255,
-)
-
-IBM855_char_to_order_map = (
-255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
-253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
-252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
-253,142,143,144,145,146,147,148,149,150,151,152, 74,153, 75,154,  # 40
-155,156,157,158,159,160,161,162,163,164,165,253,253,253,253,253,  # 50
-253, 71,172, 66,173, 65,174, 76,175, 64,176,177, 77, 72,178, 69,  # 60
- 67,179, 78, 73,180,181, 79,182,183,184,185,253,253,253,253,253,  # 70
-191,192,193,194, 68,195,196,197,198,199,200,201,202,203,204,205,
-206,207,208,209,210,211,212,213,214,215,216,217, 27, 59, 54, 70,
-  3, 37, 21, 44, 28, 58, 13, 41,  2, 48, 39, 53, 19, 46,218,219,
-220,221,222,223,224, 26, 55,  4, 42,225,226,227,228, 23, 60,229,
-230,231,232,233,234,235, 11, 36,236,237,238,239,240,241,242,243,
-  8, 49, 12, 38,  5, 31,  1, 34, 15,244,245,246,247, 35, 16,248,
- 43,  9, 45,  7, 32,  6, 40, 14, 52, 24, 56, 10, 33, 17, 61,249,
-250, 18, 62, 20, 51, 25, 57, 30, 47, 29, 63, 22, 50,251,252,255,
-)
-
-IBM866_char_to_order_map = (
-255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
-253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
-252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
-253,142,143,144,145,146,147,148,149,150,151,152, 74,153, 75,154,  # 40
-155,156,157,158,159,160,161,162,163,164,165,253,253,253,253,253,  # 50
-253, 71,172, 66,173, 65,174, 76,175, 64,176,177, 77, 72,178, 69,  # 60
- 67,179, 78, 73,180,181, 79,182,183,184,185,253,253,253,253,253,  # 70
- 37, 44, 33, 46, 41, 48, 56, 51, 42, 60, 36, 49, 38, 31, 34, 35,
- 45, 32, 40, 52, 53, 55, 58, 50, 57, 63, 70, 62, 61, 47, 59, 43,
-  3, 21, 10, 19, 13,  2, 24, 20,  4, 23, 11,  8, 12,  5,  1, 15,
-191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,
-207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,
-223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,
-  9,  7,  6, 14, 39, 26, 28, 22, 25, 29, 54, 18, 17, 30, 27, 16,
-239, 68,240,241,242,243,244,245,246,247,248,249,250,251,252,255,
-)
-
-# Model Table:
-# total sequences: 100%
-# first 512 sequences: 97.6601%
-# first 1024 sequences: 2.3389%
-# rest  sequences:      0.1237%
-# negative sequences:   0.0009%
-RussianLangModel = (
-0,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,1,1,3,3,3,3,1,3,3,3,2,3,2,3,3,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,0,3,2,2,2,2,2,0,0,2,
-3,3,3,2,3,3,3,3,3,3,3,3,3,3,2,3,3,0,0,3,3,3,3,3,3,3,3,3,2,3,2,0,
-0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,2,2,3,3,3,3,3,3,3,3,3,2,3,3,0,0,3,3,3,3,3,3,3,3,2,3,3,1,0,
-0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,2,3,2,3,3,3,3,3,3,3,3,3,3,3,3,3,0,0,3,3,3,3,3,3,3,3,3,3,3,2,1,
-0,0,0,0,0,0,0,2,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,3,0,0,3,3,3,3,3,3,3,3,3,3,3,2,1,
-0,0,0,0,0,1,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,2,2,2,3,1,3,3,1,3,3,3,3,2,2,3,0,2,2,2,3,3,2,1,0,
-0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,2,3,3,3,3,3,2,2,3,2,3,3,3,2,1,2,2,0,1,2,2,2,2,2,2,0,
-0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,2,2,3,0,2,2,3,3,2,1,2,0,
-0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,1,0,0,2,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,2,3,3,1,2,3,2,2,3,2,3,3,3,3,2,2,3,0,3,2,2,3,1,1,1,0,
-0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,2,2,3,3,3,3,3,2,3,3,3,3,2,2,2,0,3,3,3,2,2,2,2,0,
-0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,3,3,2,3,2,3,3,3,3,3,3,2,3,2,2,0,1,3,2,1,2,2,1,0,
-0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,3,3,3,2,1,1,3,0,1,1,1,1,2,1,1,0,2,2,2,1,2,0,1,0,
-0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,2,3,3,2,2,2,2,1,3,2,3,2,3,2,1,2,2,0,1,1,2,1,2,1,2,0,
-0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,3,3,3,3,2,2,3,2,3,3,3,2,2,2,2,0,2,2,2,2,3,1,1,0,
-0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
-3,2,3,2,2,3,3,3,3,3,3,3,3,3,1,3,2,0,0,3,3,3,3,2,3,3,3,3,2,3,2,0,
-0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,3,3,3,3,3,2,2,3,3,0,2,1,0,3,2,3,2,3,0,0,1,2,0,0,1,0,1,2,1,1,0,
-0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,0,3,0,2,3,3,3,3,2,3,3,3,3,1,2,2,0,0,2,3,2,2,2,3,2,3,2,2,3,0,0,
-0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,2,3,0,2,3,2,3,0,1,2,3,3,2,0,2,3,0,0,2,3,2,2,0,1,3,1,3,2,2,1,0,
-0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,1,3,0,2,3,3,3,3,3,3,3,3,2,1,3,2,0,0,2,2,3,3,3,2,3,3,0,2,2,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,2,2,3,3,2,2,2,3,3,0,0,1,1,1,1,1,2,0,0,1,1,1,1,0,1,0,
-0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,2,2,3,3,3,3,3,3,3,0,3,2,3,3,2,3,2,0,2,1,0,1,1,0,1,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,2,3,3,3,2,2,2,2,3,1,3,2,3,1,1,2,1,0,2,2,2,2,1,3,1,0,
-0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
-2,2,3,3,3,3,3,1,2,2,1,3,1,0,3,0,0,3,0,0,0,1,1,0,1,2,1,0,0,0,0,0,
-0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,2,2,1,1,3,3,3,2,2,1,2,2,3,1,1,2,0,0,2,2,1,3,0,0,2,1,1,2,1,1,0,
-0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,2,3,3,3,3,1,2,2,2,1,2,1,3,3,1,1,2,1,2,1,2,2,0,2,0,0,1,1,0,1,0,
-0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,3,3,3,3,3,2,1,3,2,2,3,2,0,3,2,0,3,0,1,0,1,1,0,0,1,1,1,1,0,1,0,
-0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,2,3,3,3,2,2,2,3,3,1,2,1,2,1,0,1,0,1,1,0,1,0,0,2,1,1,1,0,1,0,
-0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,
-3,1,1,2,1,2,3,3,2,2,1,2,2,3,0,2,1,0,0,2,2,3,2,1,2,2,2,2,2,3,1,0,
-0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,1,1,0,1,1,2,2,1,1,3,0,0,1,3,1,1,1,0,0,0,1,0,1,1,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,1,3,3,3,2,0,0,0,2,1,0,1,0,2,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,0,1,0,0,2,3,2,2,2,1,2,2,2,1,2,1,0,0,1,1,1,0,2,0,1,1,1,0,0,1,1,
-1,0,0,0,0,0,1,2,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,
-2,3,3,3,3,0,0,0,0,1,0,0,0,0,3,0,1,2,1,0,0,0,0,0,0,0,1,1,0,0,1,1,
-1,0,1,0,1,2,0,0,1,1,2,1,0,1,1,1,1,0,1,1,1,1,0,1,0,0,1,0,0,1,1,0,
-2,2,3,2,2,2,3,1,2,2,2,2,2,2,2,2,1,1,1,1,1,1,1,0,1,0,1,1,1,0,2,1,
-1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,1,0,1,0,1,1,0,1,1,1,0,1,1,0,
-3,3,3,2,2,2,2,3,2,2,1,1,2,2,2,2,1,1,3,1,2,1,2,0,0,1,1,0,1,0,2,1,
-1,1,1,1,1,2,1,0,1,1,1,1,0,1,0,0,1,1,0,0,1,0,1,0,0,1,0,0,0,1,1,0,
-2,0,0,1,0,3,2,2,2,2,1,2,1,2,1,2,0,0,0,2,1,2,2,1,1,2,2,0,1,1,0,2,
-1,1,1,1,1,0,1,1,1,2,1,1,1,2,1,0,1,2,1,1,1,1,0,1,1,1,0,0,1,0,0,1,
-1,3,2,2,2,1,1,1,2,3,0,0,0,0,2,0,2,2,1,0,0,0,0,0,0,1,0,0,0,0,1,1,
-1,0,1,1,0,1,0,1,1,0,1,1,0,2,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,1,1,0,
-2,3,2,3,2,1,2,2,2,2,1,0,0,0,2,0,0,1,1,0,0,0,0,0,0,0,1,1,0,0,2,1,
-1,1,2,1,0,2,0,0,1,0,1,0,0,1,0,0,1,1,0,1,1,0,0,0,0,0,1,0,0,0,0,0,
-3,0,0,1,0,2,2,2,3,2,2,2,2,2,2,2,0,0,0,2,1,2,1,1,1,2,2,0,0,0,1,2,
-1,1,1,1,1,0,1,2,1,1,1,1,1,1,1,0,1,1,1,1,1,1,0,1,1,1,1,1,1,0,0,1,
-2,3,2,3,3,2,0,1,1,1,0,0,1,0,2,0,1,1,3,1,0,0,0,0,0,0,0,1,0,0,2,1,
-1,1,1,1,1,1,1,0,1,0,1,1,1,1,0,1,1,1,0,0,1,1,0,1,0,0,0,0,0,0,1,0,
-2,3,3,3,3,1,2,2,2,2,0,1,1,0,2,1,1,1,2,1,0,1,1,0,0,1,0,1,0,0,2,0,
-0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,3,3,3,2,0,0,1,1,2,2,1,0,0,2,0,1,1,3,0,0,1,0,0,0,0,0,1,0,1,2,1,
-1,1,2,0,1,1,1,0,1,0,1,1,0,1,0,1,1,1,1,0,1,0,0,0,0,0,0,1,0,1,1,0,
-1,3,2,3,2,1,0,0,2,2,2,0,1,0,2,0,1,1,1,0,1,0,0,0,3,0,1,1,0,0,2,1,
-1,1,1,0,1,1,0,0,0,0,1,1,0,1,0,0,2,1,1,0,1,0,0,0,1,0,1,0,0,1,1,0,
-3,1,2,1,1,2,2,2,2,2,2,1,2,2,1,1,0,0,0,2,2,2,0,0,0,1,2,1,0,1,0,1,
-2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,2,1,1,1,0,1,0,1,1,0,1,1,1,0,0,1,
-3,0,0,0,0,2,0,1,1,1,1,1,1,1,0,1,0,0,0,1,1,1,0,1,0,1,1,0,0,1,0,1,
-1,1,0,0,1,0,0,0,1,0,1,1,0,0,1,0,1,0,1,0,0,0,0,1,0,0,0,1,0,0,0,1,
-1,3,3,2,2,0,0,0,2,2,0,0,0,1,2,0,1,1,2,0,0,0,0,0,0,0,0,1,0,0,2,1,
-0,1,1,0,0,1,1,0,0,0,1,1,0,1,1,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,1,0,
-2,3,2,3,2,0,0,0,0,1,1,0,0,0,2,0,2,0,2,0,0,0,0,0,1,0,0,1,0,0,1,1,
-1,1,2,0,1,2,1,0,1,1,2,1,1,1,1,1,2,1,1,0,1,0,0,1,1,1,1,1,0,1,1,0,
-1,3,2,2,2,1,0,0,2,2,1,0,1,2,2,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,1,1,
-0,0,1,1,0,1,1,0,0,1,1,0,1,1,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,
-1,0,0,1,0,2,3,1,2,2,2,2,2,2,1,1,0,0,0,1,0,1,0,2,1,1,1,0,0,0,0,1,
-1,1,0,1,1,0,1,1,1,1,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,
-2,0,2,0,0,1,0,3,2,1,2,1,2,2,0,1,0,0,0,2,1,0,0,2,1,1,1,1,0,2,0,2,
-2,1,1,1,1,1,1,1,1,1,1,1,1,2,1,0,1,1,1,1,0,0,0,1,1,1,1,0,1,0,0,1,
-1,2,2,2,2,1,0,0,1,0,0,0,0,0,2,0,1,1,1,1,0,0,0,0,1,0,1,2,0,0,2,0,
-1,0,1,1,1,2,1,0,1,0,1,1,0,0,1,0,1,1,1,0,1,0,0,0,1,0,0,1,0,1,1,0,
-2,1,2,2,2,0,3,0,1,1,0,0,0,0,2,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
-0,0,0,1,1,1,0,0,1,0,1,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,
-1,2,2,3,2,2,0,0,1,1,2,0,1,2,1,0,1,0,1,0,0,1,0,0,0,0,0,0,0,0,0,1,
-0,1,1,0,0,1,1,0,0,1,1,0,0,1,1,0,1,1,0,0,1,0,0,0,0,0,0,0,0,1,1,0,
-2,2,1,1,2,1,2,2,2,2,2,1,2,2,0,1,0,0,0,1,2,2,2,1,2,1,1,1,1,1,2,1,
-1,1,1,1,1,1,1,1,1,1,0,0,1,1,1,0,1,1,1,0,0,0,0,1,1,1,0,1,1,0,0,1,
-1,2,2,2,2,0,1,0,2,2,0,0,0,0,2,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,2,0,
-0,0,1,0,0,1,0,0,0,0,1,0,1,1,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,
-0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,2,2,2,2,0,0,0,2,2,2,0,1,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,
-0,1,1,0,0,1,1,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,2,2,2,2,0,0,0,0,1,0,0,1,1,2,0,0,0,0,1,0,1,0,0,1,0,0,2,0,0,0,1,
-0,0,1,0,0,1,0,0,0,1,1,0,0,0,0,0,1,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,
-1,2,2,2,1,1,2,0,2,1,1,1,1,0,2,2,0,0,0,0,0,0,0,0,0,1,1,0,0,0,1,1,
-0,0,1,0,1,1,0,0,0,0,1,0,0,0,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,
-1,0,2,1,2,0,0,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,
-0,0,1,0,1,1,0,0,0,0,1,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,
-1,0,0,0,0,2,0,1,2,1,0,1,1,1,0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,0,0,1,
-0,0,0,0,0,1,0,0,1,1,0,0,1,1,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,
-2,2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
-1,0,0,0,1,0,0,0,1,1,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,1,0,0,0,0,0,
-2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
-1,1,1,0,1,0,1,0,0,1,1,1,1,0,0,0,1,0,0,0,0,1,0,0,0,1,0,1,0,0,0,0,
-1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
-1,1,0,1,1,0,1,0,1,0,0,0,0,1,1,0,1,1,0,0,0,0,0,1,0,1,1,0,1,0,0,0,
-0,1,1,1,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,1,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,
-)
-
-Koi8rModel = {
-  'char_to_order_map': KOI8R_char_to_order_map,
-  'precedence_matrix': RussianLangModel,
-  'typical_positive_ratio': 0.976601,
-  'keep_english_letter': False,
-  'charset_name': "KOI8-R",
-  'language': 'Russian',
-}
-
-Win1251CyrillicModel = {
-  'char_to_order_map': win1251_char_to_order_map,
-  'precedence_matrix': RussianLangModel,
-  'typical_positive_ratio': 0.976601,
-  'keep_english_letter': False,
-  'charset_name': "windows-1251",
-  'language': 'Russian',
-}
-
-Latin5CyrillicModel = {
-  'char_to_order_map': latin5_char_to_order_map,
-  'precedence_matrix': RussianLangModel,
-  'typical_positive_ratio': 0.976601,
-  'keep_english_letter': False,
-  'charset_name': "ISO-8859-5",
-  'language': 'Russian',
-}
-
-MacCyrillicModel = {
-  'char_to_order_map': macCyrillic_char_to_order_map,
-  'precedence_matrix': RussianLangModel,
-  'typical_positive_ratio': 0.976601,
-  'keep_english_letter': False,
-  'charset_name': "MacCyrillic",
-  'language': 'Russian',
-}
-
-Ibm866Model = {
-  'char_to_order_map': IBM866_char_to_order_map,
-  'precedence_matrix': RussianLangModel,
-  'typical_positive_ratio': 0.976601,
-  'keep_english_letter': False,
-  'charset_name': "IBM866",
-  'language': 'Russian',
-}
-
-Ibm855Model = {
-  'char_to_order_map': IBM855_char_to_order_map,
-  'precedence_matrix': RussianLangModel,
-  'typical_positive_ratio': 0.976601,
-  'keep_english_letter': False,
-  'charset_name': "IBM855",
-  'language': 'Russian',
-}
diff --git a/venv/lib/python3.7/site-packages/chardet/langgreekmodel.py b/venv/lib/python3.7/site-packages/chardet/langgreekmodel.py
deleted file mode 100644
index 5332221..0000000
--- a/venv/lib/python3.7/site-packages/chardet/langgreekmodel.py
+++ /dev/null
@@ -1,225 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-# 255: Control characters that usually does not exist in any text
-# 254: Carriage/Return
-# 253: symbol (punctuation) that does not belong to word
-# 252: 0 - 9
-
-# Character Mapping Table:
-Latin7_char_to_order_map = (
-255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
-253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
-252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
-253, 82,100,104, 94, 98,101,116,102,111,187,117, 92, 88,113, 85,  # 40
- 79,118,105, 83, 67,114,119, 95, 99,109,188,253,253,253,253,253,  # 50
-253, 72, 70, 80, 81, 60, 96, 93, 89, 68,120, 97, 77, 86, 69, 55,  # 60
- 78,115, 65, 66, 58, 76,106,103, 87,107,112,253,253,253,253,253,  # 70
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 80
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 90
-253,233, 90,253,253,253,253,253,253,253,253,253,253, 74,253,253,  # a0
-253,253,253,253,247,248, 61, 36, 46, 71, 73,253, 54,253,108,123,  # b0
-110, 31, 51, 43, 41, 34, 91, 40, 52, 47, 44, 53, 38, 49, 59, 39,  # c0
- 35, 48,250, 37, 33, 45, 56, 50, 84, 57,120,121, 17, 18, 22, 15,  # d0
-124,  1, 29, 20, 21,  3, 32, 13, 25,  5, 11, 16, 10,  6, 30,  4,  # e0
-  9,  8, 14,  7,  2, 12, 28, 23, 42, 24, 64, 75, 19, 26, 27,253,  # f0
-)
-
-win1253_char_to_order_map = (
-255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
-253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
-252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
-253, 82,100,104, 94, 98,101,116,102,111,187,117, 92, 88,113, 85,  # 40
- 79,118,105, 83, 67,114,119, 95, 99,109,188,253,253,253,253,253,  # 50
-253, 72, 70, 80, 81, 60, 96, 93, 89, 68,120, 97, 77, 86, 69, 55,  # 60
- 78,115, 65, 66, 58, 76,106,103, 87,107,112,253,253,253,253,253,  # 70
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 80
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 90
-253,233, 61,253,253,253,253,253,253,253,253,253,253, 74,253,253,  # a0
-253,253,253,253,247,253,253, 36, 46, 71, 73,253, 54,253,108,123,  # b0
-110, 31, 51, 43, 41, 34, 91, 40, 52, 47, 44, 53, 38, 49, 59, 39,  # c0
- 35, 48,250, 37, 33, 45, 56, 50, 84, 57,120,121, 17, 18, 22, 15,  # d0
-124,  1, 29, 20, 21,  3, 32, 13, 25,  5, 11, 16, 10,  6, 30,  4,  # e0
-  9,  8, 14,  7,  2, 12, 28, 23, 42, 24, 64, 75, 19, 26, 27,253,  # f0
-)
-
-# Model Table:
-# total sequences: 100%
-# first 512 sequences: 98.2851%
-# first 1024 sequences:1.7001%
-# rest  sequences:     0.0359%
-# negative sequences:  0.0148%
-GreekLangModel = (
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,3,2,2,3,3,3,3,3,3,3,3,1,3,3,3,0,2,2,3,3,0,3,0,3,2,0,3,3,3,0,
-3,0,0,0,2,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,3,3,3,3,0,3,3,0,3,2,3,3,0,3,2,3,3,3,0,0,3,0,3,0,3,3,2,0,0,0,
-2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,
-0,2,3,2,2,3,3,3,3,3,3,3,3,0,3,3,3,3,0,2,3,3,0,3,3,3,3,2,3,3,3,0,
-2,0,0,0,2,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,2,3,3,2,3,3,3,3,3,3,3,3,3,3,3,3,0,2,1,3,3,3,3,2,3,3,2,3,3,2,0,
-0,0,0,0,2,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,3,3,3,0,3,3,3,3,3,3,0,3,3,0,3,3,3,3,3,3,3,3,3,3,0,3,2,3,3,0,
-2,0,1,0,2,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,
-0,3,3,3,3,3,2,3,0,0,0,0,3,3,0,3,1,3,3,3,0,3,3,0,3,3,3,3,0,0,0,0,
-2,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,3,3,3,3,0,3,0,3,3,3,3,3,0,3,2,2,2,3,0,2,3,3,3,3,3,2,3,3,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,3,3,3,3,3,2,2,2,3,3,3,3,0,3,1,3,3,3,3,2,3,3,3,3,3,3,3,2,2,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,3,3,3,3,2,0,3,0,0,0,3,3,2,3,3,3,3,3,0,0,3,2,3,0,2,3,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,0,3,3,3,3,0,0,3,3,0,2,3,0,3,0,3,3,3,0,0,3,0,3,0,2,2,3,3,0,0,
-0,0,1,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,3,3,3,3,2,0,3,2,3,3,3,3,0,3,3,3,3,3,0,3,3,2,3,2,3,3,2,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,3,2,3,2,3,3,3,3,3,3,0,2,3,2,3,2,2,2,3,2,3,3,2,3,0,2,2,2,3,0,
-2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,3,0,0,0,3,3,3,2,3,3,0,0,3,0,3,0,0,0,3,2,0,3,0,3,0,0,2,0,2,0,
-0,0,0,0,2,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,3,3,3,0,3,3,3,3,3,3,0,3,3,0,3,0,0,0,3,3,0,3,3,3,0,0,1,2,3,0,
-3,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,3,3,3,3,2,0,0,3,2,2,3,3,0,3,3,3,3,3,2,1,3,0,3,2,3,3,2,1,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,3,3,0,2,3,3,3,3,3,3,0,0,3,0,3,0,0,0,3,3,0,3,2,3,0,0,3,3,3,0,
-3,0,0,0,2,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,3,3,3,0,3,3,3,3,3,3,0,0,3,0,3,0,0,0,3,2,0,3,2,3,0,0,3,2,3,0,
-2,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,3,1,2,2,3,3,3,3,3,3,0,2,3,0,3,0,0,0,3,3,0,3,0,2,0,0,2,3,1,0,
-2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,0,3,3,3,3,0,3,0,3,3,2,3,0,3,3,3,3,3,3,0,3,3,3,0,2,3,0,0,3,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,0,3,3,3,0,0,3,0,0,0,3,3,0,3,0,2,3,3,0,0,3,0,3,0,3,3,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,3,0,0,0,3,3,3,3,3,3,0,0,3,0,2,0,0,0,3,3,0,3,0,3,0,0,2,0,2,0,
-0,0,0,0,1,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,3,3,3,3,3,0,3,0,2,0,3,2,0,3,2,3,2,3,0,0,3,2,3,2,3,3,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,3,0,0,2,3,3,3,3,3,0,0,0,3,0,2,1,0,0,3,2,2,2,0,3,0,0,2,2,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,0,3,3,3,2,0,3,0,3,0,3,3,0,2,1,2,3,3,0,0,3,0,3,0,3,3,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,2,3,3,3,0,3,3,3,3,3,3,0,2,3,0,3,0,0,0,2,1,0,2,2,3,0,0,2,2,2,0,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,3,0,0,2,3,3,3,2,3,0,0,1,3,0,2,0,0,0,0,3,0,1,0,2,0,0,1,1,1,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,3,3,3,3,1,0,3,0,0,0,3,2,0,3,2,3,3,3,0,0,3,0,3,2,2,2,1,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,0,3,3,3,0,0,3,0,0,0,0,2,0,2,3,3,2,2,2,2,3,0,2,0,2,2,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,3,3,3,2,0,0,0,0,0,0,2,3,0,2,0,2,3,2,0,0,3,0,3,0,3,1,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,3,2,3,3,2,2,3,0,2,0,3,0,0,0,2,0,0,0,0,1,2,0,2,0,2,0,
-0,2,0,2,0,2,2,0,0,1,0,2,2,2,0,2,2,2,0,2,2,2,0,0,2,0,0,1,0,0,0,0,
-0,2,0,3,3,2,0,0,0,0,0,0,1,3,0,2,0,2,2,2,0,0,2,0,3,0,0,2,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,0,2,3,2,0,2,2,0,2,0,2,2,0,2,0,2,2,2,0,0,0,0,0,0,2,3,0,0,0,2,
-0,1,2,0,0,0,0,2,2,0,0,0,2,1,0,2,2,0,0,0,0,0,0,1,0,2,0,0,0,0,0,0,
-0,0,2,1,0,2,3,2,2,3,2,3,2,0,0,3,3,3,0,0,3,2,0,0,0,1,1,0,2,0,2,2,
-0,2,0,2,0,2,2,0,0,2,0,2,2,2,0,2,2,2,2,0,0,2,0,0,0,2,0,1,0,0,0,0,
-0,3,0,3,3,2,2,0,3,0,0,0,2,2,0,2,2,2,1,2,0,0,1,2,2,0,0,3,0,0,0,2,
-0,1,2,0,0,0,1,2,0,0,0,0,0,0,0,2,2,0,1,0,0,2,0,0,0,2,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,2,3,3,2,2,0,0,0,2,0,2,3,3,0,2,0,0,0,0,0,0,2,2,2,0,2,2,0,2,0,2,
-0,2,2,0,0,2,2,2,2,1,0,0,2,2,0,2,0,0,2,0,0,0,0,0,0,2,0,0,0,0,0,0,
-0,2,0,3,2,3,0,0,0,3,0,0,2,2,0,2,0,2,2,2,0,0,2,0,0,0,0,0,0,0,0,2,
-0,0,2,2,0,0,2,2,2,0,0,0,0,0,0,2,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,2,0,0,3,2,0,2,2,2,2,2,0,0,0,2,0,0,0,0,2,0,1,0,0,2,0,1,0,0,0,
-0,2,2,2,0,2,2,0,1,2,0,2,2,2,0,2,2,2,2,1,2,2,0,0,2,0,0,0,0,0,0,0,
-0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,
-0,2,0,2,0,2,2,0,0,0,0,1,2,1,0,0,2,2,0,0,2,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,3,2,3,0,0,2,0,0,0,2,2,0,2,0,0,0,1,0,0,2,0,2,0,2,2,0,0,0,0,
-0,0,2,0,0,0,0,2,2,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,
-0,2,2,3,2,2,0,0,0,0,0,0,1,3,0,2,0,2,2,0,0,0,1,0,2,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,2,0,2,0,3,2,0,2,0,0,0,0,0,0,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
-0,0,2,0,0,0,0,1,1,0,0,2,1,2,0,2,2,0,1,0,0,1,0,0,0,2,0,0,0,0,0,0,
-0,3,0,2,2,2,0,0,2,0,0,0,2,0,0,0,2,3,0,2,0,0,0,0,0,0,2,2,0,0,0,2,
-0,1,2,0,0,0,1,2,2,1,0,0,0,2,0,0,2,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,2,1,2,0,2,2,0,2,0,0,2,0,0,0,0,1,2,1,0,2,1,0,0,0,0,0,0,0,0,0,0,
-0,0,2,0,0,0,3,1,2,2,0,2,0,0,0,0,2,0,0,0,2,0,0,3,0,0,0,0,2,2,2,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,2,1,0,2,0,1,2,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,1,0,0,0,0,0,0,2,
-0,2,2,0,0,2,2,2,2,2,0,1,2,0,0,0,2,2,0,1,0,2,0,0,2,2,0,0,0,0,0,0,
-0,0,0,0,1,0,0,0,0,0,0,0,3,0,0,2,0,0,0,0,0,0,0,0,2,0,2,0,0,0,0,2,
-0,1,2,0,0,0,0,2,2,1,0,1,0,1,0,2,2,2,1,0,0,0,0,0,0,1,0,0,0,0,0,0,
-0,2,0,1,2,0,0,0,0,0,0,0,0,0,0,2,0,0,2,2,0,0,0,0,1,0,0,0,0,0,0,2,
-0,2,2,0,0,0,0,2,2,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,2,0,0,2,0,0,0,
-0,2,2,2,2,0,0,0,3,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,2,0,0,0,0,0,0,1,
-0,0,2,0,0,0,0,1,2,0,0,0,0,0,0,2,2,1,1,0,0,0,0,0,0,1,0,0,0,0,0,0,
-0,2,0,2,2,2,0,0,2,0,0,0,0,0,0,0,2,2,2,0,0,0,2,0,0,0,0,0,0,0,0,2,
-0,0,1,0,0,0,0,2,1,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,
-0,3,0,2,0,0,0,0,0,0,0,0,2,0,0,0,0,0,2,0,0,0,0,0,0,0,2,0,0,0,0,2,
-0,0,2,0,0,0,0,2,2,0,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,2,0,2,2,1,0,0,0,0,0,0,2,0,0,2,0,2,2,2,0,0,0,0,0,0,2,0,0,0,0,2,
-0,0,2,0,0,2,0,2,2,0,0,0,0,2,0,2,0,0,0,0,0,2,0,0,0,2,0,0,0,0,0,0,
-0,0,3,0,0,0,2,2,0,2,2,0,0,0,0,0,2,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,2,0,0,0,0,0,
-0,2,2,2,2,2,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,1,
-0,0,0,0,0,0,0,2,1,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,2,2,0,0,0,0,0,2,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,
-0,2,0,0,0,2,0,0,0,0,0,1,0,0,0,0,2,2,0,0,0,1,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,1,0,2,0,0,0,
-0,2,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,1,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,1,0,0,2,0,2,0,0,0,
-0,0,0,0,0,0,0,0,2,1,0,0,0,0,0,0,2,0,0,0,1,2,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-)
-
-Latin7GreekModel = {
-  'char_to_order_map': Latin7_char_to_order_map,
-  'precedence_matrix': GreekLangModel,
-  'typical_positive_ratio': 0.982851,
-  'keep_english_letter': False,
-  'charset_name': "ISO-8859-7",
-  'language': 'Greek',
-}
-
-Win1253GreekModel = {
-  'char_to_order_map': win1253_char_to_order_map,
-  'precedence_matrix': GreekLangModel,
-  'typical_positive_ratio': 0.982851,
-  'keep_english_letter': False,
-  'charset_name': "windows-1253",
-  'language': 'Greek',
-}
diff --git a/venv/lib/python3.7/site-packages/chardet/langhebrewmodel.py b/venv/lib/python3.7/site-packages/chardet/langhebrewmodel.py
deleted file mode 100644
index 58f4c87..0000000
--- a/venv/lib/python3.7/site-packages/chardet/langhebrewmodel.py
+++ /dev/null
@@ -1,200 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Universal charset detector code.
-#
-# The Initial Developer of the Original Code is
-#          Simon Montagu
-# Portions created by the Initial Developer are Copyright (C) 2005
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#   Shy Shalom - original C code
-#   Shoshannah Forbes - original C code (?)
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-# 255: Control characters that usually does not exist in any text
-# 254: Carriage/Return
-# 253: symbol (punctuation) that does not belong to word
-# 252: 0 - 9
-
-# Windows-1255 language model
-# Character Mapping Table:
-WIN1255_CHAR_TO_ORDER_MAP = (
-255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
-253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
-252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
-253, 69, 91, 79, 80, 92, 89, 97, 90, 68,111,112, 82, 73, 95, 85,  # 40
- 78,121, 86, 71, 67,102,107, 84,114,103,115,253,253,253,253,253,  # 50
-253, 50, 74, 60, 61, 42, 76, 70, 64, 53,105, 93, 56, 65, 54, 49,  # 60
- 66,110, 51, 43, 44, 63, 81, 77, 98, 75,108,253,253,253,253,253,  # 70
-124,202,203,204,205, 40, 58,206,207,208,209,210,211,212,213,214,
-215, 83, 52, 47, 46, 72, 32, 94,216,113,217,109,218,219,220,221,
- 34,116,222,118,100,223,224,117,119,104,125,225,226, 87, 99,227,
-106,122,123,228, 55,229,230,101,231,232,120,233, 48, 39, 57,234,
- 30, 59, 41, 88, 33, 37, 36, 31, 29, 35,235, 62, 28,236,126,237,
-238, 38, 45,239,240,241,242,243,127,244,245,246,247,248,249,250,
-  9,  8, 20, 16,  3,  2, 24, 14, 22,  1, 25, 15,  4, 11,  6, 23,
- 12, 19, 13, 26, 18, 27, 21, 17,  7, 10,  5,251,252,128, 96,253,
-)
-
-# Model Table:
-# total sequences: 100%
-# first 512 sequences: 98.4004%
-# first 1024 sequences: 1.5981%
-# rest  sequences:      0.087%
-# negative sequences:   0.0015%
-HEBREW_LANG_MODEL = (
-0,3,3,3,3,3,3,3,3,3,3,2,3,3,3,3,3,3,3,3,3,3,3,2,3,2,1,2,0,1,0,0,
-3,0,3,1,0,0,1,3,2,0,1,1,2,0,2,2,2,1,1,1,1,2,1,1,1,2,0,0,2,2,0,1,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,2,2,2,
-1,2,1,2,1,2,0,0,2,0,0,0,0,0,1,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,2,2,
-1,2,1,3,1,1,0,0,2,0,0,0,1,0,1,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,1,0,1,2,2,1,3,
-1,2,1,1,2,2,0,0,2,2,0,0,0,0,1,0,1,0,0,0,1,0,0,0,0,0,0,1,0,1,1,0,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,3,2,2,2,2,3,2,
-1,2,1,2,2,2,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,3,2,3,2,2,3,2,2,2,1,2,2,2,2,
-1,2,1,1,2,2,0,1,2,0,0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,0,2,2,2,2,2,
-0,2,0,2,2,2,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,0,2,2,2,
-0,2,1,2,2,2,0,0,2,1,0,0,0,0,1,0,1,0,0,0,0,0,0,2,0,0,0,0,0,0,1,0,
-3,3,3,3,3,3,3,3,3,3,3,2,3,3,3,3,3,3,3,3,3,3,3,3,3,2,1,2,3,2,2,2,
-1,2,1,2,2,2,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,1,0,
-3,3,3,3,3,3,3,3,3,2,3,3,3,2,3,3,3,3,3,3,3,3,3,3,3,3,3,1,0,2,0,2,
-0,2,1,2,2,2,0,0,1,2,0,0,0,0,1,0,1,0,0,0,0,0,0,1,0,0,0,2,0,0,1,0,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,2,3,2,2,3,2,1,2,1,1,1,
-0,1,1,1,1,1,3,0,1,0,0,0,0,2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
-3,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,0,1,1,0,0,1,0,0,1,0,0,0,0,
-0,0,1,0,0,0,0,0,2,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,2,2,2,2,2,2,
-0,2,0,1,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
-3,3,3,3,3,3,3,3,3,2,3,3,3,2,1,2,3,3,2,3,3,3,3,2,3,2,1,2,0,2,1,2,
-0,2,0,2,2,2,0,0,1,2,0,0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,1,0,
-3,3,3,3,3,3,3,3,3,2,3,3,3,1,2,2,3,3,2,3,2,3,2,2,3,1,2,2,0,2,2,2,
-0,2,1,2,2,2,0,0,1,2,0,0,0,0,1,0,0,0,0,0,1,0,0,1,0,0,0,1,0,0,1,0,
-3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,3,3,2,3,3,2,2,2,3,3,3,3,1,3,2,2,2,
-0,2,0,1,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,2,3,3,3,2,3,2,2,2,1,2,2,0,2,2,2,2,
-0,2,0,2,2,2,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
-3,3,3,3,3,3,3,3,3,3,3,2,3,3,3,1,3,2,3,3,2,3,3,2,2,1,2,2,2,2,2,2,
-0,2,1,2,1,2,0,0,1,0,0,0,0,0,1,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,1,0,
-3,3,3,3,3,3,2,3,2,3,3,2,3,3,3,3,2,3,2,3,3,3,3,3,2,2,2,2,2,2,2,1,
-0,2,0,1,2,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,
-3,3,3,3,3,3,3,3,3,2,1,2,3,3,3,3,3,3,3,2,3,2,3,2,1,2,3,0,2,1,2,2,
-0,2,1,1,2,1,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,2,0,
-3,3,3,3,3,3,3,3,3,2,3,3,3,3,2,1,3,1,2,2,2,1,2,3,3,1,2,1,2,2,2,2,
-0,1,1,1,1,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,2,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,3,3,0,2,3,3,3,1,3,3,3,1,2,2,2,2,1,1,2,2,2,2,2,2,
-0,2,0,1,1,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,
-3,3,3,3,3,3,2,3,3,3,2,2,3,3,3,2,1,2,3,2,3,2,2,2,2,1,2,1,1,1,2,2,
-0,2,1,1,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
-3,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,0,0,0,1,0,0,0,0,0,
-1,0,1,0,0,0,0,0,2,0,0,0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,2,3,3,2,3,1,2,2,2,2,3,2,3,1,1,2,2,1,2,2,1,1,0,2,2,2,2,
-0,1,0,1,2,2,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,
-3,0,0,1,1,0,1,0,0,1,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,2,2,0,
-0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,0,1,0,1,0,1,1,0,1,1,0,0,0,1,1,0,1,1,1,0,0,0,0,0,0,1,0,0,0,0,0,
-0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,0,0,0,1,1,0,1,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,
-3,2,2,1,2,2,2,2,2,2,2,1,2,2,1,2,2,1,1,1,1,1,1,1,1,2,1,1,0,3,3,3,
-0,3,0,2,2,2,2,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
-2,2,2,3,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,1,2,2,1,2,2,2,1,1,1,2,0,1,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,2,2,2,2,2,2,2,2,2,2,1,2,2,2,2,2,2,2,2,2,2,2,0,2,2,0,0,0,0,0,0,
-0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,3,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,1,2,1,0,2,1,0,
-0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,1,1,1,1,1,1,1,1,1,1,0,0,1,1,1,1,0,1,1,1,1,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,
-0,3,1,1,2,2,2,2,2,1,2,2,2,1,1,2,2,2,2,2,2,2,1,2,2,1,0,1,1,1,1,0,
-0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,2,1,1,1,1,2,1,1,2,1,0,1,1,1,1,1,1,1,1,1,1,1,0,1,0,0,0,0,0,0,0,
-0,0,2,0,0,0,0,0,0,0,0,1,1,0,0,0,0,1,1,0,0,1,1,0,0,0,0,0,0,1,0,0,
-2,1,1,2,2,2,2,2,2,2,2,2,2,2,1,2,2,2,2,2,1,2,1,2,1,1,1,1,0,0,0,0,
-0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,2,1,2,2,2,2,2,2,2,2,2,2,1,2,1,2,1,1,2,1,1,1,2,1,2,1,2,0,1,0,1,
-0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,1,2,2,2,1,2,2,2,2,2,2,2,2,1,2,1,1,1,1,1,1,2,1,2,1,1,0,1,0,1,
-0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,1,2,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,2,2,
-0,2,0,1,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
-3,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,1,1,1,1,1,1,1,0,1,1,0,1,0,0,1,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,2,0,1,1,1,0,1,0,0,0,1,1,0,1,1,0,0,0,0,0,1,1,0,0,
-0,1,1,1,2,1,2,2,2,0,2,0,2,0,1,1,2,1,1,1,1,2,1,0,1,1,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,0,1,0,0,0,0,0,1,0,1,2,2,0,1,0,0,1,1,2,2,1,2,0,2,0,0,0,1,2,0,1,
-2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,2,0,2,1,2,0,2,0,0,1,1,1,1,1,1,0,1,0,0,0,1,0,0,1,
-2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,1,0,0,0,0,0,1,0,2,1,1,0,1,0,0,1,1,1,2,2,0,0,1,0,0,0,1,0,0,1,
-1,1,2,1,0,1,1,1,0,1,0,1,1,1,1,0,0,0,1,0,1,0,0,0,0,0,0,0,0,2,2,1,
-0,2,0,1,2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,1,0,0,1,0,1,1,1,1,0,0,0,0,0,1,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,1,1,1,1,1,1,1,1,2,1,0,1,1,1,1,1,1,1,1,1,1,1,0,1,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,1,1,1,0,0,0,0,1,1,1,0,1,1,0,1,0,0,0,1,1,0,1,
-2,0,1,0,1,0,1,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,1,0,1,1,1,0,1,0,0,1,1,2,1,1,2,0,1,0,0,0,1,1,0,1,
-1,0,0,1,0,0,1,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,1,0,1,1,2,0,1,0,0,0,0,2,1,1,2,0,2,0,0,0,1,1,0,1,
-1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,1,0,2,1,1,0,1,0,0,2,2,1,2,1,1,0,1,0,0,0,1,1,0,1,
-2,0,1,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,1,2,2,0,0,0,0,0,1,1,0,1,0,0,1,0,0,0,0,1,0,1,
-1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,1,2,2,0,0,0,0,2,1,1,1,0,2,1,1,0,0,0,2,1,0,1,
-1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,1,0,1,1,2,0,1,0,0,1,1,0,2,1,1,0,1,0,0,0,1,1,0,1,
-2,2,1,1,1,0,1,1,0,1,1,0,1,0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,1,0,2,1,1,0,1,0,0,1,1,0,1,2,1,0,2,0,0,0,1,1,0,1,
-2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,
-0,1,0,0,2,0,2,1,1,0,1,0,1,0,0,1,0,0,0,0,1,0,0,0,1,0,0,0,0,0,1,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,0,0,1,0,0,1,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,1,0,1,1,2,0,1,0,0,1,1,1,0,1,0,0,1,0,0,0,1,0,0,1,
-1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,0,0,0,0,0,0,0,1,0,1,1,0,0,1,0,0,2,1,1,1,1,1,0,1,0,0,0,0,1,0,1,
-0,1,1,1,2,1,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,1,2,1,0,0,0,0,0,1,1,1,1,1,0,1,0,0,0,1,1,0,0,
-)
-
-Win1255HebrewModel = {
-  'char_to_order_map': WIN1255_CHAR_TO_ORDER_MAP,
-  'precedence_matrix': HEBREW_LANG_MODEL,
-  'typical_positive_ratio': 0.984004,
-  'keep_english_letter': False,
-  'charset_name': "windows-1255",
-  'language': 'Hebrew',
-}
diff --git a/venv/lib/python3.7/site-packages/chardet/langhungarianmodel.py b/venv/lib/python3.7/site-packages/chardet/langhungarianmodel.py
deleted file mode 100644
index bb7c095..0000000
--- a/venv/lib/python3.7/site-packages/chardet/langhungarianmodel.py
+++ /dev/null
@@ -1,225 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-# 255: Control characters that usually does not exist in any text
-# 254: Carriage/Return
-# 253: symbol (punctuation) that does not belong to word
-# 252: 0 - 9
-
-# Character Mapping Table:
-Latin2_HungarianCharToOrderMap = (
-255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
-253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
-252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
-253, 28, 40, 54, 45, 32, 50, 49, 38, 39, 53, 36, 41, 34, 35, 47,
- 46, 71, 43, 33, 37, 57, 48, 64, 68, 55, 52,253,253,253,253,253,
-253,  2, 18, 26, 17,  1, 27, 12, 20,  9, 22,  7,  6, 13,  4,  8,
- 23, 67, 10,  5,  3, 21, 19, 65, 62, 16, 11,253,253,253,253,253,
-159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,
-175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,
-191,192,193,194,195,196,197, 75,198,199,200,201,202,203,204,205,
- 79,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,
-221, 51, 81,222, 78,223,224,225,226, 44,227,228,229, 61,230,231,
-232,233,234, 58,235, 66, 59,236,237,238, 60, 69, 63,239,240,241,
- 82, 14, 74,242, 70, 80,243, 72,244, 15, 83, 77, 84, 30, 76, 85,
-245,246,247, 25, 73, 42, 24,248,249,250, 31, 56, 29,251,252,253,
-)
-
-win1250HungarianCharToOrderMap = (
-255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
-253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
-252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
-253, 28, 40, 54, 45, 32, 50, 49, 38, 39, 53, 36, 41, 34, 35, 47,
- 46, 72, 43, 33, 37, 57, 48, 64, 68, 55, 52,253,253,253,253,253,
-253,  2, 18, 26, 17,  1, 27, 12, 20,  9, 22,  7,  6, 13,  4,  8,
- 23, 67, 10,  5,  3, 21, 19, 65, 62, 16, 11,253,253,253,253,253,
-161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,
-177,178,179,180, 78,181, 69,182,183,184,185,186,187,188,189,190,
-191,192,193,194,195,196,197, 76,198,199,200,201,202,203,204,205,
- 81,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,
-221, 51, 83,222, 80,223,224,225,226, 44,227,228,229, 61,230,231,
-232,233,234, 58,235, 66, 59,236,237,238, 60, 70, 63,239,240,241,
- 84, 14, 75,242, 71, 82,243, 73,244, 15, 85, 79, 86, 30, 77, 87,
-245,246,247, 25, 74, 42, 24,248,249,250, 31, 56, 29,251,252,253,
-)
-
-# Model Table:
-# total sequences: 100%
-# first 512 sequences: 94.7368%
-# first 1024 sequences:5.2623%
-# rest  sequences:     0.8894%
-# negative sequences:  0.0009%
-HungarianLangModel = (
-0,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,1,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,
-3,3,3,3,3,3,3,3,3,3,2,3,3,3,3,3,3,3,3,2,2,3,3,1,1,2,2,2,2,2,1,2,
-3,2,2,3,3,3,3,3,2,3,3,3,3,3,3,1,2,3,3,3,3,2,3,3,1,1,3,3,0,1,1,1,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,
-3,2,1,3,3,3,3,3,2,3,3,3,3,3,1,1,2,3,3,3,3,3,3,3,1,1,3,2,0,1,1,1,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
-3,3,3,3,3,3,3,3,3,3,3,1,1,2,3,3,3,1,3,3,3,3,3,1,3,3,2,2,0,3,2,3,
-0,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,
-3,3,3,3,3,3,2,3,3,3,2,3,3,2,3,3,3,3,3,2,3,3,2,2,3,2,3,2,0,3,2,2,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,
-3,3,3,3,3,3,2,3,3,3,3,3,2,3,3,3,1,2,3,2,2,3,1,2,3,3,2,2,0,3,3,3,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,3,3,2,2,3,3,3,3,3,3,2,3,3,3,3,2,3,3,3,3,0,2,3,2,
-0,0,0,1,1,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,3,3,3,1,1,1,3,3,2,1,3,2,2,3,2,1,3,2,2,1,0,3,3,1,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
-3,2,2,3,3,3,3,3,1,2,3,3,3,3,1,2,1,3,3,3,3,2,2,3,1,1,3,2,0,1,1,1,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
-3,3,3,3,3,3,3,3,2,2,3,3,3,3,3,2,1,3,3,3,3,3,2,2,1,3,3,3,0,1,1,2,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,3,3,2,3,3,2,3,3,3,2,0,3,2,3,
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-3,3,3,3,3,3,2,3,3,3,2,3,2,3,3,3,1,3,2,2,2,3,1,1,3,3,1,1,0,3,3,2,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,2,3,3,3,2,3,2,3,3,3,2,3,3,3,3,3,1,2,3,2,2,0,2,2,2,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
-3,3,3,2,2,2,3,1,3,3,2,2,1,3,3,3,1,1,3,1,2,3,2,3,2,2,2,1,0,2,2,2,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,
-3,1,1,3,3,3,3,3,1,2,3,3,3,3,1,2,1,3,3,3,2,2,3,2,1,0,3,2,0,1,1,0,
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-3,1,1,3,3,3,3,3,1,2,3,3,3,3,1,1,0,3,3,3,3,0,2,3,0,0,2,1,0,1,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,2,2,3,3,2,2,2,2,3,3,0,1,2,3,2,3,2,2,3,2,1,2,0,2,2,2,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,
-3,3,3,3,3,3,1,2,3,3,3,2,1,2,3,3,2,2,2,3,2,3,3,1,3,3,1,1,0,2,3,2,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
-3,3,3,1,2,2,2,2,3,3,3,1,1,1,3,3,1,1,3,1,1,3,2,1,2,3,1,1,0,2,2,2,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
-3,3,3,2,1,2,1,1,3,3,1,1,1,1,3,3,1,1,2,2,1,2,1,1,2,2,1,1,0,2,2,1,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
-3,3,3,1,1,2,1,1,3,3,1,0,1,1,3,3,2,0,1,1,2,3,1,0,2,2,1,0,0,1,3,2,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
-3,2,1,3,3,3,3,3,1,2,3,2,3,3,2,1,1,3,2,3,2,1,2,2,0,1,2,1,0,0,1,1,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
-3,3,3,3,2,2,2,2,3,1,2,2,1,1,3,3,0,3,2,1,2,3,2,1,3,3,1,1,0,2,1,3,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
-3,3,3,2,2,2,3,2,3,3,3,2,1,1,3,3,1,1,1,2,2,3,2,3,2,2,2,1,0,2,2,1,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
-1,0,0,3,3,3,3,3,0,0,3,3,2,3,0,0,0,2,3,3,1,0,1,2,0,0,1,1,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,1,2,3,3,3,3,3,1,2,3,3,2,2,1,1,0,3,3,2,2,1,2,2,1,0,2,2,0,1,1,1,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,2,2,1,3,1,2,3,3,2,2,1,1,2,2,1,1,1,1,3,2,1,1,1,1,2,1,0,1,2,1,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,1,0,0,0,0,0,0,0,0,0,
-2,3,3,1,1,1,1,1,3,3,3,0,1,1,3,3,1,1,1,1,1,2,2,0,3,1,1,2,0,2,1,1,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
-3,1,0,1,2,1,2,2,0,1,2,3,1,2,0,0,0,2,1,1,1,1,1,2,0,0,1,1,0,0,0,0,
-1,2,1,2,2,2,1,2,1,2,0,2,0,2,2,1,1,2,1,1,2,1,1,1,0,1,0,0,0,1,1,0,
-1,1,1,2,3,2,3,3,0,1,2,2,3,1,0,1,0,2,1,2,2,0,1,1,0,0,1,1,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,0,0,3,3,2,2,1,0,0,3,2,3,2,0,0,0,1,1,3,0,0,1,1,0,0,2,1,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,1,1,2,2,3,3,1,0,1,3,2,3,1,1,1,0,1,1,1,1,1,3,1,0,0,2,2,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,1,1,1,2,2,2,1,0,1,2,3,3,2,0,0,0,2,1,1,1,2,1,1,1,0,1,1,1,0,0,0,
-1,2,2,2,2,2,1,1,1,2,0,2,1,1,1,1,1,2,1,1,1,1,1,1,0,1,1,1,0,0,1,1,
-3,2,2,1,0,0,1,1,2,2,0,3,0,1,2,1,1,0,0,1,1,1,0,1,1,1,1,0,2,1,1,1,
-2,2,1,1,1,2,1,2,1,1,1,1,1,1,1,2,1,1,1,2,3,1,1,1,1,1,1,1,1,1,0,1,
-2,3,3,0,1,0,0,0,3,3,1,0,0,1,2,2,1,0,0,0,0,2,0,0,1,1,1,0,2,1,1,1,
-2,1,1,1,1,1,1,2,1,1,0,1,1,0,1,1,1,0,1,2,1,1,0,1,1,1,1,1,1,1,0,1,
-2,3,3,0,1,0,0,0,2,2,0,0,0,0,1,2,2,0,0,0,0,1,0,0,1,1,0,0,2,0,1,0,
-2,1,1,1,1,2,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,2,0,1,1,1,1,1,0,1,
-3,2,2,0,1,0,1,0,2,3,2,0,0,1,2,2,1,0,0,1,1,1,0,0,2,1,0,1,2,2,1,1,
-2,1,1,1,1,1,1,2,1,1,1,1,1,1,0,2,1,0,1,1,0,1,1,1,0,1,1,2,1,1,0,1,
-2,2,2,0,0,1,0,0,2,2,1,1,0,0,2,1,1,0,0,0,1,2,0,0,2,1,0,0,2,1,1,1,
-2,1,1,1,1,2,1,2,1,1,1,2,2,1,1,2,1,1,1,2,1,1,1,1,1,1,1,1,1,1,0,1,
-1,2,3,0,0,0,1,0,3,2,1,0,0,1,2,1,1,0,0,0,0,2,1,0,1,1,0,0,2,1,2,1,
-1,1,0,0,0,1,0,1,1,1,1,1,2,0,0,1,0,0,0,2,0,0,1,1,1,1,1,1,1,1,0,1,
-3,0,0,2,1,2,2,1,0,0,2,1,2,2,0,0,0,2,1,1,1,0,1,1,0,0,1,1,2,0,0,0,
-1,2,1,2,2,1,1,2,1,2,0,1,1,1,1,1,1,1,1,1,2,1,1,0,0,1,1,1,1,0,0,1,
-1,3,2,0,0,0,1,0,2,2,2,0,0,0,2,2,1,0,0,0,0,3,1,1,1,1,0,0,2,1,1,1,
-2,1,0,1,1,1,0,1,1,1,1,1,1,1,0,2,1,0,0,1,0,1,1,0,1,1,1,1,1,1,0,1,
-2,3,2,0,0,0,1,0,2,2,0,0,0,0,2,1,1,0,0,0,0,2,1,0,1,1,0,0,2,1,1,0,
-2,1,1,1,1,2,1,2,1,2,0,1,1,1,0,2,1,1,1,2,1,1,1,1,0,1,1,1,1,1,0,1,
-3,1,1,2,2,2,3,2,1,1,2,2,1,1,0,1,0,2,2,1,1,1,1,1,0,0,1,1,0,1,1,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,2,2,0,0,0,0,0,2,2,0,0,0,0,2,2,1,0,0,0,1,1,0,0,1,2,0,0,2,1,1,1,
-2,2,1,1,1,2,1,2,1,1,0,1,1,1,1,2,1,1,1,2,1,1,1,1,0,1,2,1,1,1,0,1,
-1,0,0,1,2,3,2,1,0,0,2,0,1,1,0,0,0,1,1,1,1,0,1,1,0,0,1,0,0,0,0,0,
-1,2,1,2,1,2,1,1,1,2,0,2,1,1,1,0,1,2,0,0,1,1,1,0,0,0,0,0,0,0,0,0,
-2,3,2,0,0,0,0,0,1,1,2,1,0,0,1,1,1,0,0,0,0,2,0,0,1,1,0,0,2,1,1,1,
-2,1,1,1,1,1,1,2,1,0,1,1,1,1,0,2,1,1,1,1,1,1,0,1,0,1,1,1,1,1,0,1,
-1,2,2,0,1,1,1,0,2,2,2,0,0,0,3,2,1,0,0,0,1,1,0,0,1,1,0,1,1,1,0,0,
-1,1,0,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,2,1,1,1,0,0,1,1,1,0,1,0,1,
-2,1,0,2,1,1,2,2,1,1,2,1,1,1,0,0,0,1,1,0,1,1,1,1,0,0,1,1,1,0,0,0,
-1,2,2,2,2,2,1,1,1,2,0,2,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,0,0,0,1,0,
-1,2,3,0,0,0,1,0,2,2,0,0,0,0,2,2,0,0,0,0,0,1,0,0,1,0,0,0,2,0,1,0,
-2,1,1,1,1,1,0,2,0,0,0,1,2,1,1,1,1,0,1,2,0,1,0,1,0,1,1,1,0,1,0,1,
-2,2,2,0,0,0,1,0,2,1,2,0,0,0,1,1,2,0,0,0,0,1,0,0,1,1,0,0,2,1,0,1,
-2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,0,1,1,1,1,1,0,1,
-1,2,2,0,0,0,1,0,2,2,2,0,0,0,1,1,0,0,0,0,0,1,1,0,2,0,0,1,1,1,0,1,
-1,0,1,1,1,1,1,1,0,1,1,1,1,0,0,1,0,0,1,1,0,1,0,1,1,1,1,1,0,0,0,1,
-1,0,0,1,0,1,2,1,0,0,1,1,1,2,0,0,0,1,1,0,1,0,1,1,0,0,1,0,0,0,0,0,
-0,2,1,2,1,1,1,1,1,2,0,2,0,1,1,0,1,2,1,0,1,1,1,0,0,0,0,0,0,1,0,0,
-2,1,1,0,1,2,0,0,1,1,1,0,0,0,1,1,0,0,0,0,0,1,0,0,1,0,0,0,2,1,0,1,
-2,2,1,1,1,1,1,2,1,1,0,1,1,1,1,2,1,1,1,2,1,1,0,1,0,1,1,1,1,1,0,1,
-1,2,2,0,0,0,0,0,1,1,0,0,0,0,2,1,0,0,0,0,0,2,0,0,2,2,0,0,2,0,0,1,
-2,1,1,1,1,1,1,1,0,1,1,0,1,1,0,1,0,0,0,1,1,1,1,0,0,1,1,1,1,0,0,1,
-1,1,2,0,0,3,1,0,2,1,1,1,0,0,1,1,1,0,0,0,1,1,0,0,0,1,0,0,1,0,1,0,
-1,2,1,0,1,1,1,2,1,1,0,1,1,1,1,1,0,0,0,1,1,1,1,1,0,1,0,0,0,1,0,0,
-2,1,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,0,1,0,0,0,1,0,0,0,0,2,0,0,0,
-2,1,1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,1,1,2,1,1,0,0,1,1,1,1,1,0,1,
-2,1,1,1,2,1,1,1,0,1,1,2,1,0,0,0,0,1,1,1,1,0,1,0,0,0,0,1,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,1,0,1,1,1,1,1,0,0,1,1,2,1,0,0,0,1,1,0,0,0,1,1,0,0,1,0,1,0,0,0,
-1,2,1,1,1,1,1,1,1,1,0,1,0,1,1,1,1,1,1,0,1,1,1,0,0,0,0,0,0,1,0,0,
-2,0,0,0,1,1,1,1,0,0,1,1,0,0,0,0,0,1,1,1,2,0,0,1,0,0,1,0,1,0,0,0,
-0,1,1,1,1,1,1,1,1,2,0,1,1,1,1,0,1,1,1,0,1,1,1,0,0,0,0,0,0,0,0,0,
-1,0,0,1,1,1,1,1,0,0,2,1,0,1,0,0,0,1,0,1,0,0,0,0,0,0,1,0,0,0,0,0,
-0,1,1,1,1,1,1,0,1,1,0,1,0,1,1,0,1,1,0,0,1,1,1,0,0,0,0,0,0,0,0,0,
-1,0,0,1,1,1,0,0,0,0,1,0,2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
-0,1,1,1,1,1,0,0,1,1,0,1,0,1,0,0,1,1,1,0,1,1,1,0,0,0,0,0,0,0,0,0,
-0,0,0,1,0,0,0,0,0,0,1,1,2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,1,1,1,0,1,0,0,1,1,0,1,0,1,1,0,1,1,1,0,1,1,1,0,0,0,0,0,0,0,0,0,
-2,1,1,1,1,1,1,1,1,1,1,0,0,1,1,1,0,0,1,0,0,1,0,1,0,1,1,1,0,0,1,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,0,0,1,1,1,1,0,0,0,1,1,1,0,0,0,0,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,
-0,1,1,1,1,1,1,0,1,1,0,1,0,1,0,0,1,1,0,0,1,1,0,0,0,0,0,0,0,0,0,0,
-)
-
-Latin2HungarianModel = {
-  'char_to_order_map': Latin2_HungarianCharToOrderMap,
-  'precedence_matrix': HungarianLangModel,
-  'typical_positive_ratio': 0.947368,
-  'keep_english_letter': True,
-  'charset_name': "ISO-8859-2",
-  'language': 'Hungarian',
-}
-
-Win1250HungarianModel = {
-  'char_to_order_map': win1250HungarianCharToOrderMap,
-  'precedence_matrix': HungarianLangModel,
-  'typical_positive_ratio': 0.947368,
-  'keep_english_letter': True,
-  'charset_name': "windows-1250",
-  'language': 'Hungarian',
-}
diff --git a/venv/lib/python3.7/site-packages/chardet/langthaimodel.py b/venv/lib/python3.7/site-packages/chardet/langthaimodel.py
deleted file mode 100644
index 15f94c2..0000000
--- a/venv/lib/python3.7/site-packages/chardet/langthaimodel.py
+++ /dev/null
@@ -1,199 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-# 255: Control characters that usually does not exist in any text
-# 254: Carriage/Return
-# 253: symbol (punctuation) that does not belong to word
-# 252: 0 - 9
-
-# The following result for thai was collected from a limited sample (1M).
-
-# Character Mapping Table:
-TIS620CharToOrderMap = (
-255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
-253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
-252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
-253,182,106,107,100,183,184,185,101, 94,186,187,108,109,110,111,  # 40
-188,189,190, 89, 95,112,113,191,192,193,194,253,253,253,253,253,  # 50
-253, 64, 72, 73,114, 74,115,116,102, 81,201,117, 90,103, 78, 82,  # 60
- 96,202, 91, 79, 84,104,105, 97, 98, 92,203,253,253,253,253,253,  # 70
-209,210,211,212,213, 88,214,215,216,217,218,219,220,118,221,222,
-223,224, 99, 85, 83,225,226,227,228,229,230,231,232,233,234,235,
-236,  5, 30,237, 24,238, 75,  8, 26, 52, 34, 51,119, 47, 58, 57,
- 49, 53, 55, 43, 20, 19, 44, 14, 48,  3, 17, 25, 39, 62, 31, 54,
- 45,  9, 16,  2, 61, 15,239, 12, 42, 46, 18, 21, 76,  4, 66, 63,
- 22, 10,  1, 36, 23, 13, 40, 27, 32, 35, 86,240,241,242,243,244,
- 11, 28, 41, 29, 33,245, 50, 37,  6,  7, 67, 77, 38, 93,246,247,
- 68, 56, 59, 65, 69, 60, 70, 80, 71, 87,248,249,250,251,252,253,
-)
-
-# Model Table:
-# total sequences: 100%
-# first 512 sequences: 92.6386%
-# first 1024 sequences:7.3177%
-# rest  sequences:     1.0230%
-# negative sequences:  0.0436%
-ThaiLangModel = (
-0,1,3,3,3,3,0,0,3,3,0,3,3,0,3,3,3,3,3,3,3,3,0,0,3,3,3,0,3,3,3,3,
-0,3,3,0,0,0,1,3,0,3,3,2,3,3,0,1,2,3,3,3,3,0,2,0,2,0,0,3,2,1,2,2,
-3,0,3,3,2,3,0,0,3,3,0,3,3,0,3,3,3,3,3,3,3,3,3,0,3,2,3,0,2,2,2,3,
-0,2,3,0,0,0,0,1,0,1,2,3,1,1,3,2,2,0,1,1,0,0,1,0,0,0,0,0,0,0,1,1,
-3,3,3,2,3,3,3,3,3,3,3,3,3,3,3,2,2,2,2,2,2,2,3,3,2,3,2,3,3,2,2,2,
-3,1,2,3,0,3,3,2,2,1,2,3,3,1,2,0,1,3,0,1,0,0,1,0,0,0,0,0,0,0,1,1,
-3,3,2,2,3,3,3,3,1,2,3,3,3,3,3,2,2,2,2,3,3,2,2,3,3,2,2,3,2,3,2,2,
-3,3,1,2,3,1,2,2,3,3,1,0,2,1,0,0,3,1,2,1,0,0,1,0,0,0,0,0,0,1,0,1,
-3,3,3,3,3,3,2,2,3,3,3,3,2,3,2,2,3,3,2,2,3,2,2,2,2,1,1,3,1,2,1,1,
-3,2,1,0,2,1,0,1,0,1,1,0,1,1,0,0,1,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,
-3,3,3,2,3,2,3,3,2,2,3,2,3,3,2,3,1,1,2,3,2,2,2,3,2,2,2,2,2,1,2,1,
-2,2,1,1,3,3,2,1,0,1,2,2,0,1,3,0,0,0,1,1,0,0,0,0,0,2,3,0,0,2,1,1,
-3,3,2,3,3,2,0,0,3,3,0,3,3,0,2,2,3,1,2,2,1,1,1,0,2,2,2,0,2,2,1,1,
-0,2,1,0,2,0,0,2,0,1,0,0,1,0,0,0,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,0,
-3,3,2,3,3,2,0,0,3,3,0,2,3,0,2,1,2,2,2,2,1,2,0,0,2,2,2,0,2,2,1,1,
-0,2,1,0,2,0,0,2,0,1,1,0,1,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,
-3,3,2,3,2,3,2,0,2,2,1,3,2,1,3,2,1,2,3,2,2,3,0,2,3,2,2,1,2,2,2,2,
-1,2,2,0,0,0,0,2,0,1,2,0,1,1,1,0,1,0,3,1,1,0,0,0,0,0,0,0,0,0,1,0,
-3,3,2,3,3,2,3,2,2,2,3,2,2,3,2,2,1,2,3,2,2,3,1,3,2,2,2,3,2,2,2,3,
-3,2,1,3,0,1,1,1,0,2,1,1,1,1,1,0,1,0,1,1,0,0,0,0,0,0,0,0,0,2,0,0,
-1,0,0,3,0,3,3,3,3,3,0,0,3,0,2,2,3,3,3,3,3,0,0,0,1,1,3,0,0,0,0,2,
-0,0,1,0,0,0,0,0,0,0,2,3,0,0,0,3,0,2,0,0,0,0,0,3,0,0,0,0,0,0,0,0,
-2,0,3,3,3,3,0,0,2,3,0,0,3,0,3,3,2,3,3,3,3,3,0,0,3,3,3,0,0,0,3,3,
-0,0,3,0,0,0,0,2,0,0,2,1,1,3,0,0,1,0,0,2,3,0,1,0,0,0,0,0,0,0,1,0,
-3,3,3,3,2,3,3,3,3,3,3,3,1,2,1,3,3,2,2,1,2,2,2,3,1,1,2,0,2,1,2,1,
-2,2,1,0,0,0,1,1,0,1,0,1,1,0,0,0,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,
-3,0,2,1,2,3,3,3,0,2,0,2,2,0,2,1,3,2,2,1,2,1,0,0,2,2,1,0,2,1,2,2,
-0,1,1,0,0,0,0,1,0,1,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,2,1,3,3,1,1,3,0,2,3,1,1,3,2,1,1,2,0,2,2,3,2,1,1,1,1,1,2,
-3,0,0,1,3,1,2,1,2,0,3,0,0,0,1,0,3,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,
-3,3,1,1,3,2,3,3,3,1,3,2,1,3,2,1,3,2,2,2,2,1,3,3,1,2,1,3,1,2,3,0,
-2,1,1,3,2,2,2,1,2,1,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,
-3,3,2,3,2,3,3,2,3,2,3,2,3,3,2,1,0,3,2,2,2,1,2,2,2,1,2,2,1,2,1,1,
-2,2,2,3,0,1,3,1,1,1,1,0,1,1,0,2,1,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,2,3,2,2,1,1,3,2,3,2,3,2,0,3,2,2,1,2,0,2,2,2,1,2,2,2,2,1,
-3,2,1,2,2,1,0,2,0,1,0,0,1,1,0,0,0,0,0,1,1,0,1,0,0,0,0,0,0,0,0,1,
-3,3,3,3,3,2,3,1,2,3,3,2,2,3,0,1,1,2,0,3,3,2,2,3,0,1,1,3,0,0,0,0,
-3,1,0,3,3,0,2,0,2,1,0,0,3,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,2,3,2,3,3,0,1,3,1,1,2,1,2,1,1,3,1,1,0,2,3,1,1,1,1,1,1,1,1,
-3,1,1,2,2,2,2,1,1,1,0,0,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
-3,2,2,1,1,2,1,3,3,2,3,2,2,3,2,2,3,1,2,2,1,2,0,3,2,1,2,2,2,2,2,1,
-3,2,1,2,2,2,1,1,1,1,0,0,1,1,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,1,3,3,0,2,1,0,3,2,0,0,3,1,0,1,1,0,1,0,0,0,0,0,1,
-1,0,0,1,0,3,2,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,0,2,2,2,3,0,0,1,3,0,3,2,0,3,2,2,3,3,3,3,3,1,0,2,2,2,0,2,2,1,2,
-0,2,3,0,0,0,0,1,0,1,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
-3,0,2,3,1,3,3,2,3,3,0,3,3,0,3,2,2,3,2,3,3,3,0,0,2,2,3,0,1,1,1,3,
-0,0,3,0,0,0,2,2,0,1,3,0,1,2,2,2,3,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,
-3,2,3,3,2,0,3,3,2,2,3,1,3,2,1,3,2,0,1,2,2,0,2,3,2,1,0,3,0,0,0,0,
-3,0,0,2,3,1,3,0,0,3,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,1,3,2,2,2,1,2,0,1,3,1,1,3,1,3,0,0,2,1,1,1,1,2,1,1,1,0,2,1,0,1,
-1,2,0,0,0,3,1,1,0,0,0,0,1,0,1,0,0,1,0,1,0,0,0,0,0,3,1,0,0,0,1,0,
-3,3,3,3,2,2,2,2,2,1,3,1,1,1,2,0,1,1,2,1,2,1,3,2,0,0,3,1,1,1,1,1,
-3,1,0,2,3,0,0,0,3,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,2,3,0,3,3,0,2,0,0,0,0,0,0,0,3,0,0,1,0,0,0,0,0,0,0,0,0,0,0,
-0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,2,3,1,3,0,0,1,2,0,0,2,0,3,3,2,3,3,3,2,3,0,0,2,2,2,0,0,0,2,2,
-0,0,1,0,0,0,0,3,0,0,0,0,2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
-0,0,0,3,0,2,0,0,0,0,0,0,0,0,0,0,1,2,3,1,3,3,0,0,1,0,3,0,0,0,0,0,
-0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,1,2,3,1,2,3,1,0,3,0,2,2,1,0,2,1,1,2,0,1,0,0,1,1,1,1,0,1,0,0,
-1,0,0,0,0,1,1,0,3,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,2,1,0,1,1,1,3,1,2,2,2,2,2,2,1,1,1,1,0,3,1,0,1,3,1,1,1,1,
-1,1,0,2,0,1,3,1,1,0,0,1,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,2,0,1,
-3,0,2,2,1,3,3,2,3,3,0,1,1,0,2,2,1,2,1,3,3,1,0,0,3,2,0,0,0,0,2,1,
-0,1,0,0,0,0,1,2,0,1,1,3,1,1,2,2,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,
-0,0,3,0,0,1,0,0,0,3,0,0,3,0,3,1,0,1,1,1,3,2,0,0,0,3,0,0,0,0,2,0,
-0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,2,0,0,0,0,0,0,0,0,0,
-3,3,1,3,2,1,3,3,1,2,2,0,1,2,1,0,1,2,0,0,0,0,0,3,0,0,0,3,0,0,0,0,
-3,0,0,1,1,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,0,1,2,0,3,3,3,2,2,0,1,1,0,1,3,0,0,0,2,2,0,0,0,0,3,1,0,1,0,0,0,
-0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,0,2,3,1,2,0,0,2,1,0,3,1,0,1,2,0,1,1,1,1,3,0,0,3,1,1,0,2,2,1,1,
-0,2,0,0,0,0,0,1,0,1,0,0,1,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,0,0,3,1,2,0,0,2,2,0,1,2,0,1,0,1,3,1,2,1,0,0,0,2,0,3,0,0,0,1,0,
-0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,0,1,1,2,2,0,0,0,2,0,2,1,0,1,1,0,1,1,1,2,1,0,0,1,1,1,0,2,1,1,1,
-0,1,1,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,1,
-0,0,0,2,0,1,3,1,1,1,1,0,0,0,0,3,2,0,1,0,0,0,1,2,0,0,0,1,0,0,0,0,
-0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,3,3,3,3,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,0,2,3,2,2,0,0,0,1,0,0,0,0,2,3,2,1,2,2,3,0,0,0,2,3,1,0,0,0,1,1,
-0,0,1,0,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,1,1,0,1,0,0,0,0,0,0,0,0,0,
-3,3,2,2,0,1,0,0,0,0,2,0,2,0,1,0,0,0,1,1,0,0,0,2,1,0,1,0,1,1,0,0,
-0,1,0,2,0,0,1,0,3,0,1,0,0,0,2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,1,0,0,1,0,0,0,0,0,1,1,2,0,0,0,0,1,0,0,1,3,1,0,0,0,0,1,1,0,0,
-0,1,0,0,0,0,3,0,0,0,0,0,0,3,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,
-3,3,1,1,1,1,2,3,0,0,2,1,1,1,1,1,0,2,1,1,0,0,0,2,1,0,1,2,1,1,0,1,
-2,1,0,3,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,3,1,0,0,0,0,0,0,0,3,0,0,0,3,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,1,
-0,0,0,2,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,2,0,0,0,0,0,0,1,2,1,0,1,1,0,2,0,0,1,0,0,2,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,2,0,0,0,1,3,0,1,0,0,0,2,0,0,0,0,0,0,0,1,2,0,0,0,0,0,
-3,3,0,0,1,1,2,0,0,1,2,1,0,1,1,1,0,1,1,0,0,2,1,1,0,1,0,0,1,1,1,0,
-0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,3,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,2,2,1,0,0,0,0,1,0,0,0,0,3,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,
-2,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,3,0,0,1,1,0,0,0,2,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,1,0,1,2,0,1,2,0,0,1,1,0,2,0,1,0,0,1,0,0,0,0,1,0,0,0,2,0,0,0,0,
-1,0,0,1,0,1,1,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,1,0,0,0,0,0,0,0,1,1,0,1,1,0,2,1,3,0,0,0,0,1,1,0,0,0,0,0,0,0,3,
-1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,0,1,0,1,0,0,2,0,0,2,0,0,1,1,2,0,0,1,1,0,0,0,1,0,0,0,1,1,0,0,0,
-1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
-1,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,1,1,0,0,0,
-2,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,0,0,0,0,2,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,1,0,1,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,1,3,0,0,0,
-2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,1,0,0,0,0,
-1,0,0,0,0,0,0,0,0,1,0,0,0,0,2,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,1,1,0,0,2,1,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-)
-
-TIS620ThaiModel = {
-  'char_to_order_map': TIS620CharToOrderMap,
-  'precedence_matrix': ThaiLangModel,
-  'typical_positive_ratio': 0.926386,
-  'keep_english_letter': False,
-  'charset_name': "TIS-620",
-  'language': 'Thai',
-}
diff --git a/venv/lib/python3.7/site-packages/chardet/langturkishmodel.py b/venv/lib/python3.7/site-packages/chardet/langturkishmodel.py
deleted file mode 100644
index a427a45..0000000
--- a/venv/lib/python3.7/site-packages/chardet/langturkishmodel.py
+++ /dev/null
@@ -1,193 +0,0 @@
-# -*- coding: utf-8 -*-
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#   Özgür Baskın - Turkish Language Model
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-# 255: Control characters that usually does not exist in any text
-# 254: Carriage/Return
-# 253: symbol (punctuation) that does not belong to word
-# 252: 0 - 9
-
-# Character Mapping Table:
-Latin5_TurkishCharToOrderMap = (
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-255, 23, 37, 47, 39, 29, 52, 36, 45, 53, 60, 16, 49, 20, 46, 42,
- 48, 69, 44, 35, 31, 51, 38, 62, 65, 43, 56,255,255,255,255,255,
-255,  1, 21, 28, 12,  2, 18, 27, 25,  3, 24, 10,  5, 13,  4, 15,
- 26, 64,  7,  8,  9, 14, 32, 57, 58, 11, 22,255,255,255,255,255,
-180,179,178,177,176,175,174,173,172,171,170,169,168,167,166,165,
-164,163,162,161,160,159,101,158,157,156,155,154,153,152,151,106,
-150,149,148,147,146,145,144,100,143,142,141,140,139,138,137,136,
- 94, 80, 93,135,105,134,133, 63,132,131,130,129,128,127,126,125,
-124,104, 73, 99, 79, 85,123, 54,122, 98, 92,121,120, 91,103,119,
- 68,118,117, 97,116,115, 50, 90,114,113,112,111, 55, 41, 40, 86,
- 89, 70, 59, 78, 71, 82, 88, 33, 77, 66, 84, 83,110, 75, 61, 96,
- 30, 67,109, 74, 87,102, 34, 95, 81,108, 76, 72, 17,  6, 19,107,
-)
-
-TurkishLangModel = (
-3,2,3,3,3,1,3,3,3,3,3,3,3,3,2,1,1,3,3,1,3,3,0,3,3,3,3,3,0,3,1,3,
-3,2,1,0,0,1,1,0,0,0,1,0,0,1,1,1,1,0,0,0,0,0,0,0,2,2,0,0,1,0,0,1,
-3,2,2,3,3,0,3,3,3,3,3,3,3,2,3,1,0,3,3,1,3,3,0,3,3,3,3,3,0,3,0,3,
-3,1,1,0,1,0,1,0,0,0,0,0,0,1,1,1,1,0,0,0,0,0,0,0,2,2,0,0,0,1,0,1,
-3,3,2,3,3,0,3,3,3,3,3,3,3,2,3,1,1,3,3,0,3,3,1,2,3,3,3,3,0,3,0,3,
-3,1,1,0,0,0,1,0,0,0,0,1,1,0,1,2,1,0,0,0,1,0,0,0,0,2,0,0,0,0,0,1,
-3,3,3,3,3,3,2,3,3,3,3,3,3,3,3,1,3,3,2,0,3,2,1,2,2,1,3,3,0,0,0,2,
-2,2,0,1,0,0,1,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,1,0,1,0,0,1,
-3,3,3,2,3,3,1,2,3,3,3,3,3,3,3,1,3,2,1,0,3,2,0,1,2,3,3,2,1,0,0,2,
-2,1,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,2,0,2,0,0,0,
-1,0,1,3,3,1,3,3,3,3,3,3,3,1,2,0,0,2,3,0,2,3,0,0,2,2,2,3,0,3,0,1,
-2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,0,3,3,3,0,3,2,0,2,3,2,3,3,1,0,0,2,
-3,2,0,0,1,0,0,0,0,0,0,2,0,0,1,0,0,0,0,0,0,0,0,0,1,1,1,0,2,0,0,1,
-3,3,3,2,3,3,2,3,3,3,3,2,3,3,3,0,3,3,0,0,2,1,0,0,2,3,2,2,0,0,0,2,
-2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,1,0,1,0,2,0,0,1,
-3,3,3,2,3,3,3,3,3,3,3,2,3,3,3,0,3,2,0,1,3,2,1,1,3,2,3,2,1,0,0,2,
-2,2,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,0,0,
-3,3,3,2,3,3,3,3,3,3,3,2,3,3,3,0,3,2,2,0,2,3,0,0,2,2,2,2,0,0,0,2,
-3,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,2,0,1,0,0,0,
-3,3,3,3,3,3,3,2,2,2,2,3,2,3,3,0,3,3,1,1,2,2,0,0,2,2,3,2,0,0,1,3,
-0,3,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,0,1,
-3,3,3,2,3,3,3,2,1,2,2,3,2,3,3,0,3,2,0,0,1,1,0,1,1,2,1,2,0,0,0,1,
-0,3,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,1,0,0,0,
-3,3,3,2,3,3,2,3,2,2,2,3,3,3,3,1,3,1,1,0,3,2,1,1,3,3,2,3,1,0,0,1,
-1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,2,0,0,1,
-3,2,2,3,3,0,3,3,3,3,3,3,3,2,2,1,0,3,3,1,3,3,0,1,3,3,2,3,0,3,0,3,
-2,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,
-2,2,2,3,3,0,3,3,3,3,3,3,3,3,3,0,0,3,2,0,3,3,0,3,2,3,3,3,0,3,1,3,
-2,0,0,0,0,0,0,0,0,0,0,1,0,1,2,0,1,0,0,0,0,0,0,0,2,2,0,0,1,0,0,1,
-3,3,3,1,2,3,3,1,0,0,1,0,0,3,3,2,3,0,0,2,0,0,2,0,2,0,0,0,2,0,2,0,
-0,3,1,0,1,0,0,0,2,2,1,0,1,1,2,1,2,2,2,0,2,1,1,0,0,0,2,0,0,0,0,0,
-1,2,1,3,3,0,3,3,3,3,3,2,3,0,0,0,0,2,3,0,2,3,1,0,2,3,1,3,0,3,0,2,
-3,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,1,3,3,2,2,3,2,2,0,1,2,3,0,1,2,1,0,1,0,0,0,1,0,2,2,0,0,0,1,
-1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,1,0,0,1,0,0,0,
-3,3,3,1,3,3,1,1,3,3,1,1,3,3,1,0,2,1,2,0,2,1,0,0,1,1,2,1,0,0,0,2,
-2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,1,0,2,1,3,0,0,2,0,0,3,3,0,3,0,0,1,0,1,2,0,0,1,1,2,2,0,1,0,
-0,1,2,1,1,0,1,0,1,1,1,1,1,0,1,1,1,2,2,1,2,0,1,0,0,0,0,0,0,1,0,0,
-3,3,3,2,3,2,3,3,0,2,2,2,3,3,3,0,3,0,0,0,2,2,0,1,2,1,1,1,0,0,0,1,
-0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,
-3,3,3,3,3,3,2,1,2,2,3,3,3,3,2,0,2,0,0,0,2,2,0,0,2,1,3,3,0,0,1,1,
-1,1,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,
-1,1,2,3,3,0,3,3,3,3,3,3,2,2,0,2,0,2,3,2,3,2,2,2,2,2,2,2,1,3,2,3,
-2,0,2,1,2,2,2,2,1,1,2,2,1,2,2,1,2,0,0,2,1,1,0,2,1,0,0,1,0,0,0,1,
-2,3,3,1,1,1,0,1,1,1,2,3,2,1,1,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,0,
-0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,2,2,2,3,2,3,2,2,1,3,3,3,0,2,1,2,0,2,1,0,0,1,1,1,1,1,0,0,1,
-2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,2,0,1,0,0,0,
-3,3,3,2,3,3,3,3,3,2,3,1,2,3,3,1,2,0,0,0,0,0,0,0,3,2,1,1,0,0,0,0,
-2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,
-3,3,3,2,2,3,3,2,1,1,1,1,1,3,3,0,3,1,0,0,1,1,0,0,3,1,2,1,0,0,0,0,
-0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,
-3,3,3,2,2,3,2,2,2,3,2,1,1,3,3,0,3,0,0,0,0,1,0,0,3,1,1,2,0,0,0,1,
-1,0,0,1,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
-1,1,1,3,3,0,3,3,3,3,3,2,2,2,1,2,0,2,1,2,2,1,1,0,1,2,2,2,2,2,2,2,
-0,0,2,1,2,1,2,1,0,1,1,3,1,2,1,1,2,0,0,2,0,1,0,1,0,1,0,0,0,1,0,1,
-3,3,3,1,3,3,3,0,1,1,0,2,2,3,1,0,3,0,0,0,1,0,0,0,1,0,0,1,0,1,0,0,
-1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,2,0,0,2,2,1,0,0,1,0,0,3,3,1,3,0,0,1,1,0,2,0,3,0,0,0,2,0,1,1,
-0,1,2,0,1,2,2,0,2,2,2,2,1,0,2,1,1,0,2,0,2,1,2,0,0,0,0,0,0,0,0,0,
-3,3,3,1,3,2,3,2,0,2,2,2,1,3,2,0,2,1,2,0,1,2,0,0,1,0,2,2,0,0,0,2,
-1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,1,0,0,0,
-3,3,3,0,3,3,1,1,2,3,1,0,3,2,3,0,3,0,0,0,1,0,0,0,1,0,1,0,0,0,0,0,
-1,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,3,3,0,3,3,2,3,3,2,2,0,0,0,0,1,2,0,1,3,0,0,0,3,1,1,0,3,0,2,
-2,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,1,2,2,1,0,3,1,1,1,1,3,3,2,3,0,0,1,0,1,2,0,2,2,0,2,2,0,2,1,
-0,2,2,1,1,1,1,0,2,1,1,0,1,1,1,1,2,1,2,1,2,0,1,0,1,0,0,0,0,0,0,0,
-3,3,3,0,1,1,3,0,0,1,1,0,0,2,2,0,3,0,0,1,1,0,1,0,0,0,0,0,2,0,0,0,
-0,3,1,0,1,0,1,0,2,0,0,1,0,1,0,1,1,1,2,1,1,0,2,0,0,0,0,0,0,0,0,0,
-3,3,3,0,2,0,2,0,1,1,1,0,0,3,3,0,2,0,0,1,0,0,2,1,1,0,1,0,1,0,1,0,
-0,2,0,1,2,0,2,0,2,1,1,0,1,0,2,1,1,0,2,1,1,0,1,0,0,0,1,1,0,0,0,0,
-3,2,3,0,1,0,0,0,0,0,0,0,0,1,2,0,1,0,0,1,0,0,1,0,0,0,0,0,2,0,0,0,
-0,0,1,1,0,0,1,0,1,0,0,1,0,0,0,2,1,0,1,0,2,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,0,0,2,3,0,0,1,0,1,0,2,3,2,3,0,0,1,3,0,2,1,0,0,0,0,2,0,1,0,
-0,2,1,0,0,1,1,0,2,1,0,0,1,0,0,1,1,0,1,1,2,0,1,0,0,0,0,1,0,0,0,0,
-3,2,2,0,0,1,1,0,0,0,0,0,0,3,1,1,1,0,0,0,0,0,1,0,0,0,0,0,2,0,1,0,
-0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,
-0,0,0,3,3,0,2,3,2,2,1,2,2,1,1,2,0,1,3,2,2,2,0,0,2,2,0,0,0,1,2,1,
-3,0,2,1,1,0,1,1,1,0,1,2,2,2,1,1,2,0,0,0,0,1,0,1,1,0,0,0,0,0,0,0,
-0,1,1,2,3,0,3,3,3,2,2,2,2,1,0,1,0,1,0,1,2,2,0,0,2,2,1,3,1,1,2,1,
-0,0,1,1,2,0,1,1,0,0,1,2,0,2,1,1,2,0,0,1,0,0,0,1,0,1,0,1,0,0,0,0,
-3,3,2,0,0,3,1,0,0,0,0,0,0,3,2,1,2,0,0,1,0,0,2,0,0,0,0,0,2,0,1,0,
-0,2,1,1,0,0,1,0,1,2,0,0,1,1,0,0,2,1,1,1,1,0,2,0,0,0,0,0,0,0,0,0,
-3,3,2,0,0,1,0,0,0,0,1,0,0,3,3,2,2,0,0,1,0,0,2,0,1,0,0,0,2,0,1,0,
-0,0,1,1,0,0,2,0,2,1,0,0,1,1,2,1,2,0,2,1,2,1,1,1,0,0,1,1,0,0,0,0,
-3,3,2,0,0,2,2,0,0,0,1,1,0,2,2,1,3,1,0,1,0,1,2,0,0,0,0,0,1,0,1,0,
-0,1,1,0,0,0,0,0,1,0,0,1,0,0,0,1,1,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,2,0,0,0,1,0,0,1,0,0,2,3,1,2,0,0,1,0,0,2,0,0,0,1,0,2,0,2,0,
-0,1,1,2,2,1,2,0,2,1,1,0,0,1,1,0,1,1,1,1,2,1,1,0,0,0,0,0,0,0,0,0,
-3,3,3,0,2,1,2,1,0,0,1,1,0,3,3,1,2,0,0,1,0,0,2,0,2,0,1,1,2,0,0,0,
-0,0,1,1,1,1,2,0,1,1,0,1,1,1,1,0,0,0,1,1,1,0,1,0,0,0,1,0,0,0,0,0,
-3,3,3,0,2,2,3,2,0,0,1,0,0,2,3,1,0,0,0,0,0,0,2,0,2,0,0,0,2,0,0,0,
-0,1,1,0,0,0,1,0,0,1,0,1,1,0,1,0,1,1,1,0,1,0,0,0,0,0,0,0,0,0,0,0,
-3,2,3,0,0,0,0,0,0,0,1,0,0,2,2,2,2,0,0,1,0,0,2,0,0,0,0,0,2,0,1,0,
-0,0,2,1,1,0,1,0,2,1,1,0,0,1,1,2,1,0,2,0,2,0,1,0,0,0,2,0,0,0,0,0,
-0,0,0,2,2,0,2,1,1,1,1,2,2,0,0,1,0,1,0,0,1,3,0,0,0,0,1,0,0,2,1,0,
-0,0,1,0,1,0,0,0,0,0,2,1,0,1,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,
-2,0,0,2,3,0,2,3,1,2,2,0,2,0,0,2,0,2,1,1,1,2,1,0,0,1,2,1,1,2,1,0,
-1,0,2,0,1,0,1,1,0,0,2,2,1,2,1,1,2,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,0,2,1,2,0,0,0,1,0,0,3,2,0,1,0,0,1,0,0,2,0,0,0,1,2,1,0,1,0,
-0,0,0,0,1,0,1,0,0,1,0,0,0,0,1,0,1,0,1,1,1,0,1,0,0,0,0,0,0,0,0,0,
-0,0,0,2,2,0,2,2,1,1,0,1,1,1,1,1,0,0,1,2,1,1,1,0,1,0,0,0,1,1,1,1,
-0,0,2,1,0,1,1,1,0,1,1,2,1,2,1,1,2,0,1,1,2,1,0,2,0,0,0,0,0,0,0,0,
-3,2,2,0,0,2,0,0,0,0,0,0,0,2,2,0,2,0,0,1,0,0,2,0,0,0,0,0,2,0,0,0,
-0,2,1,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,
-0,0,0,3,2,0,2,2,0,1,1,0,1,0,0,1,0,0,0,1,0,1,0,0,0,0,0,1,0,0,0,0,
-2,0,1,0,1,0,1,1,0,0,1,2,0,1,0,1,1,0,0,1,0,1,0,2,0,0,0,0,0,0,0,0,
-2,2,2,0,1,1,0,0,0,1,0,0,0,1,2,0,1,0,0,1,0,0,1,0,0,0,0,1,2,0,1,0,
-0,0,1,0,0,0,1,0,0,1,0,0,0,0,0,0,1,0,1,0,2,0,0,0,0,0,0,0,0,0,0,0,
-2,2,2,2,1,0,1,1,1,0,0,0,0,1,2,0,0,1,0,0,0,1,0,0,1,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,
-1,1,2,0,1,0,0,0,1,0,1,0,0,0,1,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,2,0,0,0,0,0,1,
-0,0,1,2,2,0,2,1,2,1,1,2,2,0,0,0,0,1,0,0,1,1,0,0,2,0,0,0,0,1,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,
-2,2,2,0,0,0,1,0,0,0,0,0,0,2,2,1,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,
-0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,1,1,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,2,2,0,1,0,1,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,1,0,1,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,1,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,1,0,0,0,0,0,0,0,0,0,0,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-)
-
-Latin5TurkishModel = {
-  'char_to_order_map': Latin5_TurkishCharToOrderMap,
-  'precedence_matrix': TurkishLangModel,
-  'typical_positive_ratio': 0.970290,
-  'keep_english_letter': True,
-  'charset_name': "ISO-8859-9",
-  'language': 'Turkish',
-}
diff --git a/venv/lib/python3.7/site-packages/chardet/latin1prober.py b/venv/lib/python3.7/site-packages/chardet/latin1prober.py
deleted file mode 100644
index 7d1e8c2..0000000
--- a/venv/lib/python3.7/site-packages/chardet/latin1prober.py
+++ /dev/null
@@ -1,145 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Universal charset detector code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 2001
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#   Shy Shalom - original C code
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .charsetprober import CharSetProber
-from .enums import ProbingState
-
-FREQ_CAT_NUM = 4
-
-UDF = 0  # undefined
-OTH = 1  # other
-ASC = 2  # ascii capital letter
-ASS = 3  # ascii small letter
-ACV = 4  # accent capital vowel
-ACO = 5  # accent capital other
-ASV = 6  # accent small vowel
-ASO = 7  # accent small other
-CLASS_NUM = 8  # total classes
-
-Latin1_CharToClass = (
-    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 00 - 07
-    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 08 - 0F
-    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 10 - 17
-    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 18 - 1F
-    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 20 - 27
-    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 28 - 2F
-    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 30 - 37
-    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 38 - 3F
-    OTH, ASC, ASC, ASC, ASC, ASC, ASC, ASC,   # 40 - 47
-    ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC,   # 48 - 4F
-    ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC,   # 50 - 57
-    ASC, ASC, ASC, OTH, OTH, OTH, OTH, OTH,   # 58 - 5F
-    OTH, ASS, ASS, ASS, ASS, ASS, ASS, ASS,   # 60 - 67
-    ASS, ASS, ASS, ASS, ASS, ASS, ASS, ASS,   # 68 - 6F
-    ASS, ASS, ASS, ASS, ASS, ASS, ASS, ASS,   # 70 - 77
-    ASS, ASS, ASS, OTH, OTH, OTH, OTH, OTH,   # 78 - 7F
-    OTH, UDF, OTH, ASO, OTH, OTH, OTH, OTH,   # 80 - 87
-    OTH, OTH, ACO, OTH, ACO, UDF, ACO, UDF,   # 88 - 8F
-    UDF, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 90 - 97
-    OTH, OTH, ASO, OTH, ASO, UDF, ASO, ACO,   # 98 - 9F
-    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # A0 - A7
-    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # A8 - AF
-    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # B0 - B7
-    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # B8 - BF
-    ACV, ACV, ACV, ACV, ACV, ACV, ACO, ACO,   # C0 - C7
-    ACV, ACV, ACV, ACV, ACV, ACV, ACV, ACV,   # C8 - CF
-    ACO, ACO, ACV, ACV, ACV, ACV, ACV, OTH,   # D0 - D7
-    ACV, ACV, ACV, ACV, ACV, ACO, ACO, ACO,   # D8 - DF
-    ASV, ASV, ASV, ASV, ASV, ASV, ASO, ASO,   # E0 - E7
-    ASV, ASV, ASV, ASV, ASV, ASV, ASV, ASV,   # E8 - EF
-    ASO, ASO, ASV, ASV, ASV, ASV, ASV, OTH,   # F0 - F7
-    ASV, ASV, ASV, ASV, ASV, ASO, ASO, ASO,   # F8 - FF
-)
-
-# 0 : illegal
-# 1 : very unlikely
-# 2 : normal
-# 3 : very likely
-Latin1ClassModel = (
-# UDF OTH ASC ASS ACV ACO ASV ASO
-    0,  0,  0,  0,  0,  0,  0,  0,  # UDF
-    0,  3,  3,  3,  3,  3,  3,  3,  # OTH
-    0,  3,  3,  3,  3,  3,  3,  3,  # ASC
-    0,  3,  3,  3,  1,  1,  3,  3,  # ASS
-    0,  3,  3,  3,  1,  2,  1,  2,  # ACV
-    0,  3,  3,  3,  3,  3,  3,  3,  # ACO
-    0,  3,  1,  3,  1,  1,  1,  3,  # ASV
-    0,  3,  1,  3,  1,  1,  3,  3,  # ASO
-)
-
-
-class Latin1Prober(CharSetProber):
-    def __init__(self):
-        super(Latin1Prober, self).__init__()
-        self._last_char_class = None
-        self._freq_counter = None
-        self.reset()
-
-    def reset(self):
-        self._last_char_class = OTH
-        self._freq_counter = [0] * FREQ_CAT_NUM
-        CharSetProber.reset(self)
-
-    @property
-    def charset_name(self):
-        return "ISO-8859-1"
-
-    @property
-    def language(self):
-        return ""
-
-    def feed(self, byte_str):
-        byte_str = self.filter_with_english_letters(byte_str)
-        for c in byte_str:
-            char_class = Latin1_CharToClass[c]
-            freq = Latin1ClassModel[(self._last_char_class * CLASS_NUM)
-                                    + char_class]
-            if freq == 0:
-                self._state = ProbingState.NOT_ME
-                break
-            self._freq_counter[freq] += 1
-            self._last_char_class = char_class
-
-        return self.state
-
-    def get_confidence(self):
-        if self.state == ProbingState.NOT_ME:
-            return 0.01
-
-        total = sum(self._freq_counter)
-        if total < 0.01:
-            confidence = 0.0
-        else:
-            confidence = ((self._freq_counter[3] - self._freq_counter[1] * 20.0)
-                          / total)
-        if confidence < 0.0:
-            confidence = 0.0
-        # lower the confidence of latin1 so that other more accurate
-        # detector can take priority.
-        confidence = confidence * 0.73
-        return confidence
diff --git a/venv/lib/python3.7/site-packages/chardet/mbcharsetprober.py b/venv/lib/python3.7/site-packages/chardet/mbcharsetprober.py
deleted file mode 100644
index 6256ecf..0000000
--- a/venv/lib/python3.7/site-packages/chardet/mbcharsetprober.py
+++ /dev/null
@@ -1,91 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Universal charset detector code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 2001
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#   Shy Shalom - original C code
-#   Proofpoint, Inc.
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .charsetprober import CharSetProber
-from .enums import ProbingState, MachineState
-
-
-class MultiByteCharSetProber(CharSetProber):
-    """
-    MultiByteCharSetProber
-    """
-
-    def __init__(self, lang_filter=None):
-        super(MultiByteCharSetProber, self).__init__(lang_filter=lang_filter)
-        self.distribution_analyzer = None
-        self.coding_sm = None
-        self._last_char = [0, 0]
-
-    def reset(self):
-        super(MultiByteCharSetProber, self).reset()
-        if self.coding_sm:
-            self.coding_sm.reset()
-        if self.distribution_analyzer:
-            self.distribution_analyzer.reset()
-        self._last_char = [0, 0]
-
-    @property
-    def charset_name(self):
-        raise NotImplementedError
-
-    @property
-    def language(self):
-        raise NotImplementedError
-
-    def feed(self, byte_str):
-        for i in range(len(byte_str)):
-            coding_state = self.coding_sm.next_state(byte_str[i])
-            if coding_state == MachineState.ERROR:
-                self.logger.debug('%s %s prober hit error at byte %s',
-                                  self.charset_name, self.language, i)
-                self._state = ProbingState.NOT_ME
-                break
-            elif coding_state == MachineState.ITS_ME:
-                self._state = ProbingState.FOUND_IT
-                break
-            elif coding_state == MachineState.START:
-                char_len = self.coding_sm.get_current_charlen()
-                if i == 0:
-                    self._last_char[1] = byte_str[0]
-                    self.distribution_analyzer.feed(self._last_char, char_len)
-                else:
-                    self.distribution_analyzer.feed(byte_str[i - 1:i + 1],
-                                                    char_len)
-
-        self._last_char[0] = byte_str[-1]
-
-        if self.state == ProbingState.DETECTING:
-            if (self.distribution_analyzer.got_enough_data() and
-                    (self.get_confidence() > self.SHORTCUT_THRESHOLD)):
-                self._state = ProbingState.FOUND_IT
-
-        return self.state
-
-    def get_confidence(self):
-        return self.distribution_analyzer.get_confidence()
diff --git a/venv/lib/python3.7/site-packages/chardet/mbcsgroupprober.py b/venv/lib/python3.7/site-packages/chardet/mbcsgroupprober.py
deleted file mode 100644
index 530abe7..0000000
--- a/venv/lib/python3.7/site-packages/chardet/mbcsgroupprober.py
+++ /dev/null
@@ -1,54 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Universal charset detector code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 2001
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#   Shy Shalom - original C code
-#   Proofpoint, Inc.
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .charsetgroupprober import CharSetGroupProber
-from .utf8prober import UTF8Prober
-from .sjisprober import SJISProber
-from .eucjpprober import EUCJPProber
-from .gb2312prober import GB2312Prober
-from .euckrprober import EUCKRProber
-from .cp949prober import CP949Prober
-from .big5prober import Big5Prober
-from .euctwprober import EUCTWProber
-
-
-class MBCSGroupProber(CharSetGroupProber):
-    def __init__(self, lang_filter=None):
-        super(MBCSGroupProber, self).__init__(lang_filter=lang_filter)
-        self.probers = [
-            UTF8Prober(),
-            SJISProber(),
-            EUCJPProber(),
-            GB2312Prober(),
-            EUCKRProber(),
-            CP949Prober(),
-            Big5Prober(),
-            EUCTWProber()
-        ]
-        self.reset()
diff --git a/venv/lib/python3.7/site-packages/chardet/mbcssm.py b/venv/lib/python3.7/site-packages/chardet/mbcssm.py
deleted file mode 100644
index 8360d0f..0000000
--- a/venv/lib/python3.7/site-packages/chardet/mbcssm.py
+++ /dev/null
@@ -1,572 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is mozilla.org code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .enums import MachineState
-
-# BIG5
-
-BIG5_CLS = (
-    1,1,1,1,1,1,1,1,  # 00 - 07    #allow 0x00 as legal value
-    1,1,1,1,1,1,0,0,  # 08 - 0f
-    1,1,1,1,1,1,1,1,  # 10 - 17
-    1,1,1,0,1,1,1,1,  # 18 - 1f
-    1,1,1,1,1,1,1,1,  # 20 - 27
-    1,1,1,1,1,1,1,1,  # 28 - 2f
-    1,1,1,1,1,1,1,1,  # 30 - 37
-    1,1,1,1,1,1,1,1,  # 38 - 3f
-    2,2,2,2,2,2,2,2,  # 40 - 47
-    2,2,2,2,2,2,2,2,  # 48 - 4f
-    2,2,2,2,2,2,2,2,  # 50 - 57
-    2,2,2,2,2,2,2,2,  # 58 - 5f
-    2,2,2,2,2,2,2,2,  # 60 - 67
-    2,2,2,2,2,2,2,2,  # 68 - 6f
-    2,2,2,2,2,2,2,2,  # 70 - 77
-    2,2,2,2,2,2,2,1,  # 78 - 7f
-    4,4,4,4,4,4,4,4,  # 80 - 87
-    4,4,4,4,4,4,4,4,  # 88 - 8f
-    4,4,4,4,4,4,4,4,  # 90 - 97
-    4,4,4,4,4,4,4,4,  # 98 - 9f
-    4,3,3,3,3,3,3,3,  # a0 - a7
-    3,3,3,3,3,3,3,3,  # a8 - af
-    3,3,3,3,3,3,3,3,  # b0 - b7
-    3,3,3,3,3,3,3,3,  # b8 - bf
-    3,3,3,3,3,3,3,3,  # c0 - c7
-    3,3,3,3,3,3,3,3,  # c8 - cf
-    3,3,3,3,3,3,3,3,  # d0 - d7
-    3,3,3,3,3,3,3,3,  # d8 - df
-    3,3,3,3,3,3,3,3,  # e0 - e7
-    3,3,3,3,3,3,3,3,  # e8 - ef
-    3,3,3,3,3,3,3,3,  # f0 - f7
-    3,3,3,3,3,3,3,0  # f8 - ff
-)
-
-BIG5_ST = (
-    MachineState.ERROR,MachineState.START,MachineState.START,     3,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#00-07
-    MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,#08-0f
-    MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START#10-17
-)
-
-BIG5_CHAR_LEN_TABLE = (0, 1, 1, 2, 0)
-
-BIG5_SM_MODEL = {'class_table': BIG5_CLS,
-                 'class_factor': 5,
-                 'state_table': BIG5_ST,
-                 'char_len_table': BIG5_CHAR_LEN_TABLE,
-                 'name': 'Big5'}
-
-# CP949
-
-CP949_CLS  = (
-    1,1,1,1,1,1,1,1, 1,1,1,1,1,1,0,0,  # 00 - 0f
-    1,1,1,1,1,1,1,1, 1,1,1,0,1,1,1,1,  # 10 - 1f
-    1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,  # 20 - 2f
-    1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,  # 30 - 3f
-    1,4,4,4,4,4,4,4, 4,4,4,4,4,4,4,4,  # 40 - 4f
-    4,4,5,5,5,5,5,5, 5,5,5,1,1,1,1,1,  # 50 - 5f
-    1,5,5,5,5,5,5,5, 5,5,5,5,5,5,5,5,  # 60 - 6f
-    5,5,5,5,5,5,5,5, 5,5,5,1,1,1,1,1,  # 70 - 7f
-    0,6,6,6,6,6,6,6, 6,6,6,6,6,6,6,6,  # 80 - 8f
-    6,6,6,6,6,6,6,6, 6,6,6,6,6,6,6,6,  # 90 - 9f
-    6,7,7,7,7,7,7,7, 7,7,7,7,7,8,8,8,  # a0 - af
-    7,7,7,7,7,7,7,7, 7,7,7,7,7,7,7,7,  # b0 - bf
-    7,7,7,7,7,7,9,2, 2,3,2,2,2,2,2,2,  # c0 - cf
-    2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,  # d0 - df
-    2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,  # e0 - ef
-    2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,0,  # f0 - ff
-)
-
-CP949_ST = (
-#cls=    0      1      2      3      4      5      6      7      8      9  # previous state =
-    MachineState.ERROR,MachineState.START,     3,MachineState.ERROR,MachineState.START,MachineState.START,     4,     5,MachineState.ERROR,     6, # MachineState.START
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR, # MachineState.ERROR
-    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME, # MachineState.ITS_ME
-    MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START, # 3
-    MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START, # 4
-    MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START, # 5
-    MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START, # 6
-)
-
-CP949_CHAR_LEN_TABLE = (0, 1, 2, 0, 1, 1, 2, 2, 0, 2)
-
-CP949_SM_MODEL = {'class_table': CP949_CLS,
-                  'class_factor': 10,
-                  'state_table': CP949_ST,
-                  'char_len_table': CP949_CHAR_LEN_TABLE,
-                  'name': 'CP949'}
-
-# EUC-JP
-
-EUCJP_CLS = (
-    4,4,4,4,4,4,4,4,  # 00 - 07
-    4,4,4,4,4,4,5,5,  # 08 - 0f
-    4,4,4,4,4,4,4,4,  # 10 - 17
-    4,4,4,5,4,4,4,4,  # 18 - 1f
-    4,4,4,4,4,4,4,4,  # 20 - 27
-    4,4,4,4,4,4,4,4,  # 28 - 2f
-    4,4,4,4,4,4,4,4,  # 30 - 37
-    4,4,4,4,4,4,4,4,  # 38 - 3f
-    4,4,4,4,4,4,4,4,  # 40 - 47
-    4,4,4,4,4,4,4,4,  # 48 - 4f
-    4,4,4,4,4,4,4,4,  # 50 - 57
-    4,4,4,4,4,4,4,4,  # 58 - 5f
-    4,4,4,4,4,4,4,4,  # 60 - 67
-    4,4,4,4,4,4,4,4,  # 68 - 6f
-    4,4,4,4,4,4,4,4,  # 70 - 77
-    4,4,4,4,4,4,4,4,  # 78 - 7f
-    5,5,5,5,5,5,5,5,  # 80 - 87
-    5,5,5,5,5,5,1,3,  # 88 - 8f
-    5,5,5,5,5,5,5,5,  # 90 - 97
-    5,5,5,5,5,5,5,5,  # 98 - 9f
-    5,2,2,2,2,2,2,2,  # a0 - a7
-    2,2,2,2,2,2,2,2,  # a8 - af
-    2,2,2,2,2,2,2,2,  # b0 - b7
-    2,2,2,2,2,2,2,2,  # b8 - bf
-    2,2,2,2,2,2,2,2,  # c0 - c7
-    2,2,2,2,2,2,2,2,  # c8 - cf
-    2,2,2,2,2,2,2,2,  # d0 - d7
-    2,2,2,2,2,2,2,2,  # d8 - df
-    0,0,0,0,0,0,0,0,  # e0 - e7
-    0,0,0,0,0,0,0,0,  # e8 - ef
-    0,0,0,0,0,0,0,0,  # f0 - f7
-    0,0,0,0,0,0,0,5  # f8 - ff
-)
-
-EUCJP_ST = (
-          3,     4,     3,     5,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#00-07
-     MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
-     MachineState.ITS_ME,MachineState.ITS_ME,MachineState.START,MachineState.ERROR,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#10-17
-     MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     3,MachineState.ERROR,#18-1f
-          3,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START#20-27
-)
-
-EUCJP_CHAR_LEN_TABLE = (2, 2, 2, 3, 1, 0)
-
-EUCJP_SM_MODEL = {'class_table': EUCJP_CLS,
-                  'class_factor': 6,
-                  'state_table': EUCJP_ST,
-                  'char_len_table': EUCJP_CHAR_LEN_TABLE,
-                  'name': 'EUC-JP'}
-
-# EUC-KR
-
-EUCKR_CLS  = (
-    1,1,1,1,1,1,1,1,  # 00 - 07
-    1,1,1,1,1,1,0,0,  # 08 - 0f
-    1,1,1,1,1,1,1,1,  # 10 - 17
-    1,1,1,0,1,1,1,1,  # 18 - 1f
-    1,1,1,1,1,1,1,1,  # 20 - 27
-    1,1,1,1,1,1,1,1,  # 28 - 2f
-    1,1,1,1,1,1,1,1,  # 30 - 37
-    1,1,1,1,1,1,1,1,  # 38 - 3f
-    1,1,1,1,1,1,1,1,  # 40 - 47
-    1,1,1,1,1,1,1,1,  # 48 - 4f
-    1,1,1,1,1,1,1,1,  # 50 - 57
-    1,1,1,1,1,1,1,1,  # 58 - 5f
-    1,1,1,1,1,1,1,1,  # 60 - 67
-    1,1,1,1,1,1,1,1,  # 68 - 6f
-    1,1,1,1,1,1,1,1,  # 70 - 77
-    1,1,1,1,1,1,1,1,  # 78 - 7f
-    0,0,0,0,0,0,0,0,  # 80 - 87
-    0,0,0,0,0,0,0,0,  # 88 - 8f
-    0,0,0,0,0,0,0,0,  # 90 - 97
-    0,0,0,0,0,0,0,0,  # 98 - 9f
-    0,2,2,2,2,2,2,2,  # a0 - a7
-    2,2,2,2,2,3,3,3,  # a8 - af
-    2,2,2,2,2,2,2,2,  # b0 - b7
-    2,2,2,2,2,2,2,2,  # b8 - bf
-    2,2,2,2,2,2,2,2,  # c0 - c7
-    2,3,2,2,2,2,2,2,  # c8 - cf
-    2,2,2,2,2,2,2,2,  # d0 - d7
-    2,2,2,2,2,2,2,2,  # d8 - df
-    2,2,2,2,2,2,2,2,  # e0 - e7
-    2,2,2,2,2,2,2,2,  # e8 - ef
-    2,2,2,2,2,2,2,2,  # f0 - f7
-    2,2,2,2,2,2,2,0   # f8 - ff
-)
-
-EUCKR_ST = (
-    MachineState.ERROR,MachineState.START,     3,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#00-07
-    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START #08-0f
-)
-
-EUCKR_CHAR_LEN_TABLE = (0, 1, 2, 0)
-
-EUCKR_SM_MODEL = {'class_table': EUCKR_CLS,
-                'class_factor': 4,
-                'state_table': EUCKR_ST,
-                'char_len_table': EUCKR_CHAR_LEN_TABLE,
-                'name': 'EUC-KR'}
-
-# EUC-TW
-
-EUCTW_CLS = (
-    2,2,2,2,2,2,2,2,  # 00 - 07
-    2,2,2,2,2,2,0,0,  # 08 - 0f
-    2,2,2,2,2,2,2,2,  # 10 - 17
-    2,2,2,0,2,2,2,2,  # 18 - 1f
-    2,2,2,2,2,2,2,2,  # 20 - 27
-    2,2,2,2,2,2,2,2,  # 28 - 2f
-    2,2,2,2,2,2,2,2,  # 30 - 37
-    2,2,2,2,2,2,2,2,  # 38 - 3f
-    2,2,2,2,2,2,2,2,  # 40 - 47
-    2,2,2,2,2,2,2,2,  # 48 - 4f
-    2,2,2,2,2,2,2,2,  # 50 - 57
-    2,2,2,2,2,2,2,2,  # 58 - 5f
-    2,2,2,2,2,2,2,2,  # 60 - 67
-    2,2,2,2,2,2,2,2,  # 68 - 6f
-    2,2,2,2,2,2,2,2,  # 70 - 77
-    2,2,2,2,2,2,2,2,  # 78 - 7f
-    0,0,0,0,0,0,0,0,  # 80 - 87
-    0,0,0,0,0,0,6,0,  # 88 - 8f
-    0,0,0,0,0,0,0,0,  # 90 - 97
-    0,0,0,0,0,0,0,0,  # 98 - 9f
-    0,3,4,4,4,4,4,4,  # a0 - a7
-    5,5,1,1,1,1,1,1,  # a8 - af
-    1,1,1,1,1,1,1,1,  # b0 - b7
-    1,1,1,1,1,1,1,1,  # b8 - bf
-    1,1,3,1,3,3,3,3,  # c0 - c7
-    3,3,3,3,3,3,3,3,  # c8 - cf
-    3,3,3,3,3,3,3,3,  # d0 - d7
-    3,3,3,3,3,3,3,3,  # d8 - df
-    3,3,3,3,3,3,3,3,  # e0 - e7
-    3,3,3,3,3,3,3,3,  # e8 - ef
-    3,3,3,3,3,3,3,3,  # f0 - f7
-    3,3,3,3,3,3,3,0   # f8 - ff
-)
-
-EUCTW_ST = (
-    MachineState.ERROR,MachineState.ERROR,MachineState.START,     3,     3,     3,     4,MachineState.ERROR,#00-07
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
-    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.START,MachineState.ERROR,#10-17
-    MachineState.START,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#18-1f
-         5,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.ERROR,MachineState.START,MachineState.START,#20-27
-    MachineState.START,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START #28-2f
-)
-
-EUCTW_CHAR_LEN_TABLE = (0, 0, 1, 2, 2, 2, 3)
-
-EUCTW_SM_MODEL = {'class_table': EUCTW_CLS,
-                'class_factor': 7,
-                'state_table': EUCTW_ST,
-                'char_len_table': EUCTW_CHAR_LEN_TABLE,
-                'name': 'x-euc-tw'}
-
-# GB2312
-
-GB2312_CLS = (
-    1,1,1,1,1,1,1,1,  # 00 - 07
-    1,1,1,1,1,1,0,0,  # 08 - 0f
-    1,1,1,1,1,1,1,1,  # 10 - 17
-    1,1,1,0,1,1,1,1,  # 18 - 1f
-    1,1,1,1,1,1,1,1,  # 20 - 27
-    1,1,1,1,1,1,1,1,  # 28 - 2f
-    3,3,3,3,3,3,3,3,  # 30 - 37
-    3,3,1,1,1,1,1,1,  # 38 - 3f
-    2,2,2,2,2,2,2,2,  # 40 - 47
-    2,2,2,2,2,2,2,2,  # 48 - 4f
-    2,2,2,2,2,2,2,2,  # 50 - 57
-    2,2,2,2,2,2,2,2,  # 58 - 5f
-    2,2,2,2,2,2,2,2,  # 60 - 67
-    2,2,2,2,2,2,2,2,  # 68 - 6f
-    2,2,2,2,2,2,2,2,  # 70 - 77
-    2,2,2,2,2,2,2,4,  # 78 - 7f
-    5,6,6,6,6,6,6,6,  # 80 - 87
-    6,6,6,6,6,6,6,6,  # 88 - 8f
-    6,6,6,6,6,6,6,6,  # 90 - 97
-    6,6,6,6,6,6,6,6,  # 98 - 9f
-    6,6,6,6,6,6,6,6,  # a0 - a7
-    6,6,6,6,6,6,6,6,  # a8 - af
-    6,6,6,6,6,6,6,6,  # b0 - b7
-    6,6,6,6,6,6,6,6,  # b8 - bf
-    6,6,6,6,6,6,6,6,  # c0 - c7
-    6,6,6,6,6,6,6,6,  # c8 - cf
-    6,6,6,6,6,6,6,6,  # d0 - d7
-    6,6,6,6,6,6,6,6,  # d8 - df
-    6,6,6,6,6,6,6,6,  # e0 - e7
-    6,6,6,6,6,6,6,6,  # e8 - ef
-    6,6,6,6,6,6,6,6,  # f0 - f7
-    6,6,6,6,6,6,6,0   # f8 - ff
-)
-
-GB2312_ST = (
-    MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,     3,MachineState.ERROR,#00-07
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
-    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.START,#10-17
-         4,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#18-1f
-    MachineState.ERROR,MachineState.ERROR,     5,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,#20-27
-    MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START #28-2f
-)
-
-# To be accurate, the length of class 6 can be either 2 or 4.
-# But it is not necessary to discriminate between the two since
-# it is used for frequency analysis only, and we are validating
-# each code range there as well. So it is safe to set it to be
-# 2 here.
-GB2312_CHAR_LEN_TABLE = (0, 1, 1, 1, 1, 1, 2)
-
-GB2312_SM_MODEL = {'class_table': GB2312_CLS,
-                   'class_factor': 7,
-                   'state_table': GB2312_ST,
-                   'char_len_table': GB2312_CHAR_LEN_TABLE,
-                   'name': 'GB2312'}
-
-# Shift_JIS
-
-SJIS_CLS = (
-    1,1,1,1,1,1,1,1,  # 00 - 07
-    1,1,1,1,1,1,0,0,  # 08 - 0f
-    1,1,1,1,1,1,1,1,  # 10 - 17
-    1,1,1,0,1,1,1,1,  # 18 - 1f
-    1,1,1,1,1,1,1,1,  # 20 - 27
-    1,1,1,1,1,1,1,1,  # 28 - 2f
-    1,1,1,1,1,1,1,1,  # 30 - 37
-    1,1,1,1,1,1,1,1,  # 38 - 3f
-    2,2,2,2,2,2,2,2,  # 40 - 47
-    2,2,2,2,2,2,2,2,  # 48 - 4f
-    2,2,2,2,2,2,2,2,  # 50 - 57
-    2,2,2,2,2,2,2,2,  # 58 - 5f
-    2,2,2,2,2,2,2,2,  # 60 - 67
-    2,2,2,2,2,2,2,2,  # 68 - 6f
-    2,2,2,2,2,2,2,2,  # 70 - 77
-    2,2,2,2,2,2,2,1,  # 78 - 7f
-    3,3,3,3,3,2,2,3,  # 80 - 87
-    3,3,3,3,3,3,3,3,  # 88 - 8f
-    3,3,3,3,3,3,3,3,  # 90 - 97
-    3,3,3,3,3,3,3,3,  # 98 - 9f
-    #0xa0 is illegal in sjis encoding, but some pages does
-    #contain such byte. We need to be more error forgiven.
-    2,2,2,2,2,2,2,2,  # a0 - a7
-    2,2,2,2,2,2,2,2,  # a8 - af
-    2,2,2,2,2,2,2,2,  # b0 - b7
-    2,2,2,2,2,2,2,2,  # b8 - bf
-    2,2,2,2,2,2,2,2,  # c0 - c7
-    2,2,2,2,2,2,2,2,  # c8 - cf
-    2,2,2,2,2,2,2,2,  # d0 - d7
-    2,2,2,2,2,2,2,2,  # d8 - df
-    3,3,3,3,3,3,3,3,  # e0 - e7
-    3,3,3,3,3,4,4,4,  # e8 - ef
-    3,3,3,3,3,3,3,3,  # f0 - f7
-    3,3,3,3,3,0,0,0)  # f8 - ff
-
-
-SJIS_ST = (
-    MachineState.ERROR,MachineState.START,MachineState.START,     3,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#00-07
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
-    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START #10-17
-)
-
-SJIS_CHAR_LEN_TABLE = (0, 1, 1, 2, 0, 0)
-
-SJIS_SM_MODEL = {'class_table': SJIS_CLS,
-               'class_factor': 6,
-               'state_table': SJIS_ST,
-               'char_len_table': SJIS_CHAR_LEN_TABLE,
-               'name': 'Shift_JIS'}
-
-# UCS2-BE
-
-UCS2BE_CLS = (
-    0,0,0,0,0,0,0,0,  # 00 - 07
-    0,0,1,0,0,2,0,0,  # 08 - 0f
-    0,0,0,0,0,0,0,0,  # 10 - 17
-    0,0,0,3,0,0,0,0,  # 18 - 1f
-    0,0,0,0,0,0,0,0,  # 20 - 27
-    0,3,3,3,3,3,0,0,  # 28 - 2f
-    0,0,0,0,0,0,0,0,  # 30 - 37
-    0,0,0,0,0,0,0,0,  # 38 - 3f
-    0,0,0,0,0,0,0,0,  # 40 - 47
-    0,0,0,0,0,0,0,0,  # 48 - 4f
-    0,0,0,0,0,0,0,0,  # 50 - 57
-    0,0,0,0,0,0,0,0,  # 58 - 5f
-    0,0,0,0,0,0,0,0,  # 60 - 67
-    0,0,0,0,0,0,0,0,  # 68 - 6f
-    0,0,0,0,0,0,0,0,  # 70 - 77
-    0,0,0,0,0,0,0,0,  # 78 - 7f
-    0,0,0,0,0,0,0,0,  # 80 - 87
-    0,0,0,0,0,0,0,0,  # 88 - 8f
-    0,0,0,0,0,0,0,0,  # 90 - 97
-    0,0,0,0,0,0,0,0,  # 98 - 9f
-    0,0,0,0,0,0,0,0,  # a0 - a7
-    0,0,0,0,0,0,0,0,  # a8 - af
-    0,0,0,0,0,0,0,0,  # b0 - b7
-    0,0,0,0,0,0,0,0,  # b8 - bf
-    0,0,0,0,0,0,0,0,  # c0 - c7
-    0,0,0,0,0,0,0,0,  # c8 - cf
-    0,0,0,0,0,0,0,0,  # d0 - d7
-    0,0,0,0,0,0,0,0,  # d8 - df
-    0,0,0,0,0,0,0,0,  # e0 - e7
-    0,0,0,0,0,0,0,0,  # e8 - ef
-    0,0,0,0,0,0,0,0,  # f0 - f7
-    0,0,0,0,0,0,4,5   # f8 - ff
-)
-
-UCS2BE_ST  = (
-          5,     7,     7,MachineState.ERROR,     4,     3,MachineState.ERROR,MachineState.ERROR,#00-07
-     MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
-     MachineState.ITS_ME,MachineState.ITS_ME,     6,     6,     6,     6,MachineState.ERROR,MachineState.ERROR,#10-17
-          6,     6,     6,     6,     6,MachineState.ITS_ME,     6,     6,#18-1f
-          6,     6,     6,     6,     5,     7,     7,MachineState.ERROR,#20-27
-          5,     8,     6,     6,MachineState.ERROR,     6,     6,     6,#28-2f
-          6,     6,     6,     6,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START #30-37
-)
-
-UCS2BE_CHAR_LEN_TABLE = (2, 2, 2, 0, 2, 2)
-
-UCS2BE_SM_MODEL = {'class_table': UCS2BE_CLS,
-                   'class_factor': 6,
-                   'state_table': UCS2BE_ST,
-                   'char_len_table': UCS2BE_CHAR_LEN_TABLE,
-                   'name': 'UTF-16BE'}
-
-# UCS2-LE
-
-UCS2LE_CLS = (
-    0,0,0,0,0,0,0,0,  # 00 - 07
-    0,0,1,0,0,2,0,0,  # 08 - 0f
-    0,0,0,0,0,0,0,0,  # 10 - 17
-    0,0,0,3,0,0,0,0,  # 18 - 1f
-    0,0,0,0,0,0,0,0,  # 20 - 27
-    0,3,3,3,3,3,0,0,  # 28 - 2f
-    0,0,0,0,0,0,0,0,  # 30 - 37
-    0,0,0,0,0,0,0,0,  # 38 - 3f
-    0,0,0,0,0,0,0,0,  # 40 - 47
-    0,0,0,0,0,0,0,0,  # 48 - 4f
-    0,0,0,0,0,0,0,0,  # 50 - 57
-    0,0,0,0,0,0,0,0,  # 58 - 5f
-    0,0,0,0,0,0,0,0,  # 60 - 67
-    0,0,0,0,0,0,0,0,  # 68 - 6f
-    0,0,0,0,0,0,0,0,  # 70 - 77
-    0,0,0,0,0,0,0,0,  # 78 - 7f
-    0,0,0,0,0,0,0,0,  # 80 - 87
-    0,0,0,0,0,0,0,0,  # 88 - 8f
-    0,0,0,0,0,0,0,0,  # 90 - 97
-    0,0,0,0,0,0,0,0,  # 98 - 9f
-    0,0,0,0,0,0,0,0,  # a0 - a7
-    0,0,0,0,0,0,0,0,  # a8 - af
-    0,0,0,0,0,0,0,0,  # b0 - b7
-    0,0,0,0,0,0,0,0,  # b8 - bf
-    0,0,0,0,0,0,0,0,  # c0 - c7
-    0,0,0,0,0,0,0,0,  # c8 - cf
-    0,0,0,0,0,0,0,0,  # d0 - d7
-    0,0,0,0,0,0,0,0,  # d8 - df
-    0,0,0,0,0,0,0,0,  # e0 - e7
-    0,0,0,0,0,0,0,0,  # e8 - ef
-    0,0,0,0,0,0,0,0,  # f0 - f7
-    0,0,0,0,0,0,4,5   # f8 - ff
-)
-
-UCS2LE_ST = (
-          6,     6,     7,     6,     4,     3,MachineState.ERROR,MachineState.ERROR,#00-07
-     MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
-     MachineState.ITS_ME,MachineState.ITS_ME,     5,     5,     5,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,#10-17
-          5,     5,     5,MachineState.ERROR,     5,MachineState.ERROR,     6,     6,#18-1f
-          7,     6,     8,     8,     5,     5,     5,MachineState.ERROR,#20-27
-          5,     5,     5,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     5,     5,#28-2f
-          5,     5,     5,MachineState.ERROR,     5,MachineState.ERROR,MachineState.START,MachineState.START #30-37
-)
-
-UCS2LE_CHAR_LEN_TABLE = (2, 2, 2, 2, 2, 2)
-
-UCS2LE_SM_MODEL = {'class_table': UCS2LE_CLS,
-                 'class_factor': 6,
-                 'state_table': UCS2LE_ST,
-                 'char_len_table': UCS2LE_CHAR_LEN_TABLE,
-                 'name': 'UTF-16LE'}
-
-# UTF-8
-
-UTF8_CLS = (
-    1,1,1,1,1,1,1,1,  # 00 - 07  #allow 0x00 as a legal value
-    1,1,1,1,1,1,0,0,  # 08 - 0f
-    1,1,1,1,1,1,1,1,  # 10 - 17
-    1,1,1,0,1,1,1,1,  # 18 - 1f
-    1,1,1,1,1,1,1,1,  # 20 - 27
-    1,1,1,1,1,1,1,1,  # 28 - 2f
-    1,1,1,1,1,1,1,1,  # 30 - 37
-    1,1,1,1,1,1,1,1,  # 38 - 3f
-    1,1,1,1,1,1,1,1,  # 40 - 47
-    1,1,1,1,1,1,1,1,  # 48 - 4f
-    1,1,1,1,1,1,1,1,  # 50 - 57
-    1,1,1,1,1,1,1,1,  # 58 - 5f
-    1,1,1,1,1,1,1,1,  # 60 - 67
-    1,1,1,1,1,1,1,1,  # 68 - 6f
-    1,1,1,1,1,1,1,1,  # 70 - 77
-    1,1,1,1,1,1,1,1,  # 78 - 7f
-    2,2,2,2,3,3,3,3,  # 80 - 87
-    4,4,4,4,4,4,4,4,  # 88 - 8f
-    4,4,4,4,4,4,4,4,  # 90 - 97
-    4,4,4,4,4,4,4,4,  # 98 - 9f
-    5,5,5,5,5,5,5,5,  # a0 - a7
-    5,5,5,5,5,5,5,5,  # a8 - af
-    5,5,5,5,5,5,5,5,  # b0 - b7
-    5,5,5,5,5,5,5,5,  # b8 - bf
-    0,0,6,6,6,6,6,6,  # c0 - c7
-    6,6,6,6,6,6,6,6,  # c8 - cf
-    6,6,6,6,6,6,6,6,  # d0 - d7
-    6,6,6,6,6,6,6,6,  # d8 - df
-    7,8,8,8,8,8,8,8,  # e0 - e7
-    8,8,8,8,8,9,8,8,  # e8 - ef
-    10,11,11,11,11,11,11,11,  # f0 - f7
-    12,13,13,13,14,15,0,0    # f8 - ff
-)
-
-UTF8_ST = (
-    MachineState.ERROR,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     12,   10,#00-07
-         9,     11,     8,     7,     6,     5,     4,    3,#08-0f
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#10-17
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#18-1f
-    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#20-27
-    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#28-2f
-    MachineState.ERROR,MachineState.ERROR,     5,     5,     5,     5,MachineState.ERROR,MachineState.ERROR,#30-37
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#38-3f
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     5,     5,     5,MachineState.ERROR,MachineState.ERROR,#40-47
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#48-4f
-    MachineState.ERROR,MachineState.ERROR,     7,     7,     7,     7,MachineState.ERROR,MachineState.ERROR,#50-57
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#58-5f
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     7,     7,MachineState.ERROR,MachineState.ERROR,#60-67
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#68-6f
-    MachineState.ERROR,MachineState.ERROR,     9,     9,     9,     9,MachineState.ERROR,MachineState.ERROR,#70-77
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#78-7f
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     9,MachineState.ERROR,MachineState.ERROR,#80-87
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#88-8f
-    MachineState.ERROR,MachineState.ERROR,    12,    12,    12,    12,MachineState.ERROR,MachineState.ERROR,#90-97
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#98-9f
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,    12,MachineState.ERROR,MachineState.ERROR,#a0-a7
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#a8-af
-    MachineState.ERROR,MachineState.ERROR,    12,    12,    12,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#b0-b7
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#b8-bf
-    MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,#c0-c7
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR #c8-cf
-)
-
-UTF8_CHAR_LEN_TABLE = (0, 1, 0, 0, 0, 0, 2, 3, 3, 3, 4, 4, 5, 5, 6, 6)
-
-UTF8_SM_MODEL = {'class_table': UTF8_CLS,
-                 'class_factor': 16,
-                 'state_table': UTF8_ST,
-                 'char_len_table': UTF8_CHAR_LEN_TABLE,
-                 'name': 'UTF-8'}
diff --git a/venv/lib/python3.7/site-packages/chardet/sbcharsetprober.py b/venv/lib/python3.7/site-packages/chardet/sbcharsetprober.py
deleted file mode 100644
index 0adb51d..0000000
--- a/venv/lib/python3.7/site-packages/chardet/sbcharsetprober.py
+++ /dev/null
@@ -1,132 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Universal charset detector code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 2001
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#   Shy Shalom - original C code
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .charsetprober import CharSetProber
-from .enums import CharacterCategory, ProbingState, SequenceLikelihood
-
-
-class SingleByteCharSetProber(CharSetProber):
-    SAMPLE_SIZE = 64
-    SB_ENOUGH_REL_THRESHOLD = 1024  #  0.25 * SAMPLE_SIZE^2
-    POSITIVE_SHORTCUT_THRESHOLD = 0.95
-    NEGATIVE_SHORTCUT_THRESHOLD = 0.05
-
-    def __init__(self, model, reversed=False, name_prober=None):
-        super(SingleByteCharSetProber, self).__init__()
-        self._model = model
-        # TRUE if we need to reverse every pair in the model lookup
-        self._reversed = reversed
-        # Optional auxiliary prober for name decision
-        self._name_prober = name_prober
-        self._last_order = None
-        self._seq_counters = None
-        self._total_seqs = None
-        self._total_char = None
-        self._freq_char = None
-        self.reset()
-
-    def reset(self):
-        super(SingleByteCharSetProber, self).reset()
-        # char order of last character
-        self._last_order = 255
-        self._seq_counters = [0] * SequenceLikelihood.get_num_categories()
-        self._total_seqs = 0
-        self._total_char = 0
-        # characters that fall in our sampling range
-        self._freq_char = 0
-
-    @property
-    def charset_name(self):
-        if self._name_prober:
-            return self._name_prober.charset_name
-        else:
-            return self._model['charset_name']
-
-    @property
-    def language(self):
-        if self._name_prober:
-            return self._name_prober.language
-        else:
-            return self._model.get('language')
-
-    def feed(self, byte_str):
-        if not self._model['keep_english_letter']:
-            byte_str = self.filter_international_words(byte_str)
-        if not byte_str:
-            return self.state
-        char_to_order_map = self._model['char_to_order_map']
-        for i, c in enumerate(byte_str):
-            # XXX: Order is in range 1-64, so one would think we want 0-63 here,
-            #      but that leads to 27 more test failures than before.
-            order = char_to_order_map[c]
-            # XXX: This was SYMBOL_CAT_ORDER before, with a value of 250, but
-            #      CharacterCategory.SYMBOL is actually 253, so we use CONTROL
-            #      to make it closer to the original intent. The only difference
-            #      is whether or not we count digits and control characters for
-            #      _total_char purposes.
-            if order < CharacterCategory.CONTROL:
-                self._total_char += 1
-            if order < self.SAMPLE_SIZE:
-                self._freq_char += 1
-                if self._last_order < self.SAMPLE_SIZE:
-                    self._total_seqs += 1
-                    if not self._reversed:
-                        i = (self._last_order * self.SAMPLE_SIZE) + order
-                        model = self._model['precedence_matrix'][i]
-                    else:  # reverse the order of the letters in the lookup
-                        i = (order * self.SAMPLE_SIZE) + self._last_order
-                        model = self._model['precedence_matrix'][i]
-                    self._seq_counters[model] += 1
-            self._last_order = order
-
-        charset_name = self._model['charset_name']
-        if self.state == ProbingState.DETECTING:
-            if self._total_seqs > self.SB_ENOUGH_REL_THRESHOLD:
-                confidence = self.get_confidence()
-                if confidence > self.POSITIVE_SHORTCUT_THRESHOLD:
-                    self.logger.debug('%s confidence = %s, we have a winner',
-                                      charset_name, confidence)
-                    self._state = ProbingState.FOUND_IT
-                elif confidence < self.NEGATIVE_SHORTCUT_THRESHOLD:
-                    self.logger.debug('%s confidence = %s, below negative '
-                                      'shortcut threshhold %s', charset_name,
-                                      confidence,
-                                      self.NEGATIVE_SHORTCUT_THRESHOLD)
-                    self._state = ProbingState.NOT_ME
-
-        return self.state
-
-    def get_confidence(self):
-        r = 0.01
-        if self._total_seqs > 0:
-            r = ((1.0 * self._seq_counters[SequenceLikelihood.POSITIVE]) /
-                 self._total_seqs / self._model['typical_positive_ratio'])
-            r = r * self._freq_char / self._total_char
-            if r >= 1.0:
-                r = 0.99
-        return r
diff --git a/venv/lib/python3.7/site-packages/chardet/sbcsgroupprober.py b/venv/lib/python3.7/site-packages/chardet/sbcsgroupprober.py
deleted file mode 100644
index 98e95dc..0000000
--- a/venv/lib/python3.7/site-packages/chardet/sbcsgroupprober.py
+++ /dev/null
@@ -1,73 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Universal charset detector code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 2001
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#   Shy Shalom - original C code
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .charsetgroupprober import CharSetGroupProber
-from .sbcharsetprober import SingleByteCharSetProber
-from .langcyrillicmodel import (Win1251CyrillicModel, Koi8rModel,
-                                Latin5CyrillicModel, MacCyrillicModel,
-                                Ibm866Model, Ibm855Model)
-from .langgreekmodel import Latin7GreekModel, Win1253GreekModel
-from .langbulgarianmodel import Latin5BulgarianModel, Win1251BulgarianModel
-# from .langhungarianmodel import Latin2HungarianModel, Win1250HungarianModel
-from .langthaimodel import TIS620ThaiModel
-from .langhebrewmodel import Win1255HebrewModel
-from .hebrewprober import HebrewProber
-from .langturkishmodel import Latin5TurkishModel
-
-
-class SBCSGroupProber(CharSetGroupProber):
-    def __init__(self):
-        super(SBCSGroupProber, self).__init__()
-        self.probers = [
-            SingleByteCharSetProber(Win1251CyrillicModel),
-            SingleByteCharSetProber(Koi8rModel),
-            SingleByteCharSetProber(Latin5CyrillicModel),
-            SingleByteCharSetProber(MacCyrillicModel),
-            SingleByteCharSetProber(Ibm866Model),
-            SingleByteCharSetProber(Ibm855Model),
-            SingleByteCharSetProber(Latin7GreekModel),
-            SingleByteCharSetProber(Win1253GreekModel),
-            SingleByteCharSetProber(Latin5BulgarianModel),
-            SingleByteCharSetProber(Win1251BulgarianModel),
-            # TODO: Restore Hungarian encodings (iso-8859-2 and windows-1250)
-            #       after we retrain model.
-            # SingleByteCharSetProber(Latin2HungarianModel),
-            # SingleByteCharSetProber(Win1250HungarianModel),
-            SingleByteCharSetProber(TIS620ThaiModel),
-            SingleByteCharSetProber(Latin5TurkishModel),
-        ]
-        hebrew_prober = HebrewProber()
-        logical_hebrew_prober = SingleByteCharSetProber(Win1255HebrewModel,
-                                                        False, hebrew_prober)
-        visual_hebrew_prober = SingleByteCharSetProber(Win1255HebrewModel, True,
-                                                       hebrew_prober)
-        hebrew_prober.set_model_probers(logical_hebrew_prober, visual_hebrew_prober)
-        self.probers.extend([hebrew_prober, logical_hebrew_prober,
-                             visual_hebrew_prober])
-
-        self.reset()
diff --git a/venv/lib/python3.7/site-packages/chardet/sjisprober.py b/venv/lib/python3.7/site-packages/chardet/sjisprober.py
deleted file mode 100644
index 9e29623..0000000
--- a/venv/lib/python3.7/site-packages/chardet/sjisprober.py
+++ /dev/null
@@ -1,92 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is mozilla.org code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .mbcharsetprober import MultiByteCharSetProber
-from .codingstatemachine import CodingStateMachine
-from .chardistribution import SJISDistributionAnalysis
-from .jpcntx import SJISContextAnalysis
-from .mbcssm import SJIS_SM_MODEL
-from .enums import ProbingState, MachineState
-
-
-class SJISProber(MultiByteCharSetProber):
-    def __init__(self):
-        super(SJISProber, self).__init__()
-        self.coding_sm = CodingStateMachine(SJIS_SM_MODEL)
-        self.distribution_analyzer = SJISDistributionAnalysis()
-        self.context_analyzer = SJISContextAnalysis()
-        self.reset()
-
-    def reset(self):
-        super(SJISProber, self).reset()
-        self.context_analyzer.reset()
-
-    @property
-    def charset_name(self):
-        return self.context_analyzer.charset_name
-
-    @property
-    def language(self):
-        return "Japanese"
-
-    def feed(self, byte_str):
-        for i in range(len(byte_str)):
-            coding_state = self.coding_sm.next_state(byte_str[i])
-            if coding_state == MachineState.ERROR:
-                self.logger.debug('%s %s prober hit error at byte %s',
-                                  self.charset_name, self.language, i)
-                self._state = ProbingState.NOT_ME
-                break
-            elif coding_state == MachineState.ITS_ME:
-                self._state = ProbingState.FOUND_IT
-                break
-            elif coding_state == MachineState.START:
-                char_len = self.coding_sm.get_current_charlen()
-                if i == 0:
-                    self._last_char[1] = byte_str[0]
-                    self.context_analyzer.feed(self._last_char[2 - char_len:],
-                                               char_len)
-                    self.distribution_analyzer.feed(self._last_char, char_len)
-                else:
-                    self.context_analyzer.feed(byte_str[i + 1 - char_len:i + 3
-                                                        - char_len], char_len)
-                    self.distribution_analyzer.feed(byte_str[i - 1:i + 1],
-                                                    char_len)
-
-        self._last_char[0] = byte_str[-1]
-
-        if self.state == ProbingState.DETECTING:
-            if (self.context_analyzer.got_enough_data() and
-               (self.get_confidence() > self.SHORTCUT_THRESHOLD)):
-                self._state = ProbingState.FOUND_IT
-
-        return self.state
-
-    def get_confidence(self):
-        context_conf = self.context_analyzer.get_confidence()
-        distrib_conf = self.distribution_analyzer.get_confidence()
-        return max(context_conf, distrib_conf)
diff --git a/venv/lib/python3.7/site-packages/chardet/universaldetector.py b/venv/lib/python3.7/site-packages/chardet/universaldetector.py
deleted file mode 100644
index 7b4e92d..0000000
--- a/venv/lib/python3.7/site-packages/chardet/universaldetector.py
+++ /dev/null
@@ -1,286 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Universal charset detector code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 2001
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#   Shy Shalom - original C code
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-"""
-Module containing the UniversalDetector detector class, which is the primary
-class a user of ``chardet`` should use.
-
-:author: Mark Pilgrim (initial port to Python)
-:author: Shy Shalom (original C code)
-:author: Dan Blanchard (major refactoring for 3.0)
-:author: Ian Cordasco
-"""
-
-
-import codecs
-import logging
-import re
-
-from .charsetgroupprober import CharSetGroupProber
-from .enums import InputState, LanguageFilter, ProbingState
-from .escprober import EscCharSetProber
-from .latin1prober import Latin1Prober
-from .mbcsgroupprober import MBCSGroupProber
-from .sbcsgroupprober import SBCSGroupProber
-
-
-class UniversalDetector(object):
-    """
-    The ``UniversalDetector`` class underlies the ``chardet.detect`` function
-    and coordinates all of the different charset probers.
-
-    To get a ``dict`` containing an encoding and its confidence, you can simply
-    run:
-
-    .. code::
-
-            u = UniversalDetector()
-            u.feed(some_bytes)
-            u.close()
-            detected = u.result
-
-    """
-
-    MINIMUM_THRESHOLD = 0.20
-    HIGH_BYTE_DETECTOR = re.compile(b'[\x80-\xFF]')
-    ESC_DETECTOR = re.compile(b'(\033|~{)')
-    WIN_BYTE_DETECTOR = re.compile(b'[\x80-\x9F]')
-    ISO_WIN_MAP = {'iso-8859-1': 'Windows-1252',
-                   'iso-8859-2': 'Windows-1250',
-                   'iso-8859-5': 'Windows-1251',
-                   'iso-8859-6': 'Windows-1256',
-                   'iso-8859-7': 'Windows-1253',
-                   'iso-8859-8': 'Windows-1255',
-                   'iso-8859-9': 'Windows-1254',
-                   'iso-8859-13': 'Windows-1257'}
-
-    def __init__(self, lang_filter=LanguageFilter.ALL):
-        self._esc_charset_prober = None
-        self._charset_probers = []
-        self.result = None
-        self.done = None
-        self._got_data = None
-        self._input_state = None
-        self._last_char = None
-        self.lang_filter = lang_filter
-        self.logger = logging.getLogger(__name__)
-        self._has_win_bytes = None
-        self.reset()
-
-    def reset(self):
-        """
-        Reset the UniversalDetector and all of its probers back to their
-        initial states.  This is called by ``__init__``, so you only need to
-        call this directly in between analyses of different documents.
-        """
-        self.result = {'encoding': None, 'confidence': 0.0, 'language': None}
-        self.done = False
-        self._got_data = False
-        self._has_win_bytes = False
-        self._input_state = InputState.PURE_ASCII
-        self._last_char = b''
-        if self._esc_charset_prober:
-            self._esc_charset_prober.reset()
-        for prober in self._charset_probers:
-            prober.reset()
-
-    def feed(self, byte_str):
-        """
-        Takes a chunk of a document and feeds it through all of the relevant
-        charset probers.
-
-        After calling ``feed``, you can check the value of the ``done``
-        attribute to see if you need to continue feeding the
-        ``UniversalDetector`` more data, or if it has made a prediction
-        (in the ``result`` attribute).
-
-        .. note::
-           You should always call ``close`` when you're done feeding in your
-           document if ``done`` is not already ``True``.
-        """
-        if self.done:
-            return
-
-        if not len(byte_str):
-            return
-
-        if not isinstance(byte_str, bytearray):
-            byte_str = bytearray(byte_str)
-
-        # First check for known BOMs, since these are guaranteed to be correct
-        if not self._got_data:
-            # If the data starts with BOM, we know it is UTF
-            if byte_str.startswith(codecs.BOM_UTF8):
-                # EF BB BF  UTF-8 with BOM
-                self.result = {'encoding': "UTF-8-SIG",
-                               'confidence': 1.0,
-                               'language': ''}
-            elif byte_str.startswith((codecs.BOM_UTF32_LE,
-                                      codecs.BOM_UTF32_BE)):
-                # FF FE 00 00  UTF-32, little-endian BOM
-                # 00 00 FE FF  UTF-32, big-endian BOM
-                self.result = {'encoding': "UTF-32",
-                               'confidence': 1.0,
-                               'language': ''}
-            elif byte_str.startswith(b'\xFE\xFF\x00\x00'):
-                # FE FF 00 00  UCS-4, unusual octet order BOM (3412)
-                self.result = {'encoding': "X-ISO-10646-UCS-4-3412",
-                               'confidence': 1.0,
-                               'language': ''}
-            elif byte_str.startswith(b'\x00\x00\xFF\xFE'):
-                # 00 00 FF FE  UCS-4, unusual octet order BOM (2143)
-                self.result = {'encoding': "X-ISO-10646-UCS-4-2143",
-                               'confidence': 1.0,
-                               'language': ''}
-            elif byte_str.startswith((codecs.BOM_LE, codecs.BOM_BE)):
-                # FF FE  UTF-16, little endian BOM
-                # FE FF  UTF-16, big endian BOM
-                self.result = {'encoding': "UTF-16",
-                               'confidence': 1.0,
-                               'language': ''}
-
-            self._got_data = True
-            if self.result['encoding'] is not None:
-                self.done = True
-                return
-
-        # If none of those matched and we've only see ASCII so far, check
-        # for high bytes and escape sequences
-        if self._input_state == InputState.PURE_ASCII:
-            if self.HIGH_BYTE_DETECTOR.search(byte_str):
-                self._input_state = InputState.HIGH_BYTE
-            elif self._input_state == InputState.PURE_ASCII and \
-                    self.ESC_DETECTOR.search(self._last_char + byte_str):
-                self._input_state = InputState.ESC_ASCII
-
-        self._last_char = byte_str[-1:]
-
-        # If we've seen escape sequences, use the EscCharSetProber, which
-        # uses a simple state machine to check for known escape sequences in
-        # HZ and ISO-2022 encodings, since those are the only encodings that
-        # use such sequences.
-        if self._input_state == InputState.ESC_ASCII:
-            if not self._esc_charset_prober:
-                self._esc_charset_prober = EscCharSetProber(self.lang_filter)
-            if self._esc_charset_prober.feed(byte_str) == ProbingState.FOUND_IT:
-                self.result = {'encoding':
-                               self._esc_charset_prober.charset_name,
-                               'confidence':
-                               self._esc_charset_prober.get_confidence(),
-                               'language':
-                               self._esc_charset_prober.language}
-                self.done = True
-        # If we've seen high bytes (i.e., those with values greater than 127),
-        # we need to do more complicated checks using all our multi-byte and
-        # single-byte probers that are left.  The single-byte probers
-        # use character bigram distributions to determine the encoding, whereas
-        # the multi-byte probers use a combination of character unigram and
-        # bigram distributions.
-        elif self._input_state == InputState.HIGH_BYTE:
-            if not self._charset_probers:
-                self._charset_probers = [MBCSGroupProber(self.lang_filter)]
-                # If we're checking non-CJK encodings, use single-byte prober
-                if self.lang_filter & LanguageFilter.NON_CJK:
-                    self._charset_probers.append(SBCSGroupProber())
-                self._charset_probers.append(Latin1Prober())
-            for prober in self._charset_probers:
-                if prober.feed(byte_str) == ProbingState.FOUND_IT:
-                    self.result = {'encoding': prober.charset_name,
-                                   'confidence': prober.get_confidence(),
-                                   'language': prober.language}
-                    self.done = True
-                    break
-            if self.WIN_BYTE_DETECTOR.search(byte_str):
-                self._has_win_bytes = True
-
-    def close(self):
-        """
-        Stop analyzing the current document and come up with a final
-        prediction.
-
-        :returns:  The ``result`` attribute, a ``dict`` with the keys
-                   `encoding`, `confidence`, and `language`.
-        """
-        # Don't bother with checks if we're already done
-        if self.done:
-            return self.result
-        self.done = True
-
-        if not self._got_data:
-            self.logger.debug('no data received!')
-
-        # Default to ASCII if it is all we've seen so far
-        elif self._input_state == InputState.PURE_ASCII:
-            self.result = {'encoding': 'ascii',
-                           'confidence': 1.0,
-                           'language': ''}
-
-        # If we have seen non-ASCII, return the best that met MINIMUM_THRESHOLD
-        elif self._input_state == InputState.HIGH_BYTE:
-            prober_confidence = None
-            max_prober_confidence = 0.0
-            max_prober = None
-            for prober in self._charset_probers:
-                if not prober:
-                    continue
-                prober_confidence = prober.get_confidence()
-                if prober_confidence > max_prober_confidence:
-                    max_prober_confidence = prober_confidence
-                    max_prober = prober
-            if max_prober and (max_prober_confidence > self.MINIMUM_THRESHOLD):
-                charset_name = max_prober.charset_name
-                lower_charset_name = max_prober.charset_name.lower()
-                confidence = max_prober.get_confidence()
-                # Use Windows encoding name instead of ISO-8859 if we saw any
-                # extra Windows-specific bytes
-                if lower_charset_name.startswith('iso-8859'):
-                    if self._has_win_bytes:
-                        charset_name = self.ISO_WIN_MAP.get(lower_charset_name,
-                                                            charset_name)
-                self.result = {'encoding': charset_name,
-                               'confidence': confidence,
-                               'language': max_prober.language}
-
-        # Log all prober confidences if none met MINIMUM_THRESHOLD
-        if self.logger.getEffectiveLevel() == logging.DEBUG:
-            if self.result['encoding'] is None:
-                self.logger.debug('no probers hit minimum threshold')
-                for group_prober in self._charset_probers:
-                    if not group_prober:
-                        continue
-                    if isinstance(group_prober, CharSetGroupProber):
-                        for prober in group_prober.probers:
-                            self.logger.debug('%s %s confidence = %s',
-                                              prober.charset_name,
-                                              prober.language,
-                                              prober.get_confidence())
-                    else:
-                        self.logger.debug('%s %s confidence = %s',
-                                          prober.charset_name,
-                                          prober.language,
-                                          prober.get_confidence())
-        return self.result
diff --git a/venv/lib/python3.7/site-packages/chardet/utf8prober.py b/venv/lib/python3.7/site-packages/chardet/utf8prober.py
deleted file mode 100644
index 6c3196c..0000000
--- a/venv/lib/python3.7/site-packages/chardet/utf8prober.py
+++ /dev/null
@@ -1,82 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is mozilla.org code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .charsetprober import CharSetProber
-from .enums import ProbingState, MachineState
-from .codingstatemachine import CodingStateMachine
-from .mbcssm import UTF8_SM_MODEL
-
-
-
-class UTF8Prober(CharSetProber):
-    ONE_CHAR_PROB = 0.5
-
-    def __init__(self):
-        super(UTF8Prober, self).__init__()
-        self.coding_sm = CodingStateMachine(UTF8_SM_MODEL)
-        self._num_mb_chars = None
-        self.reset()
-
-    def reset(self):
-        super(UTF8Prober, self).reset()
-        self.coding_sm.reset()
-        self._num_mb_chars = 0
-
-    @property
-    def charset_name(self):
-        return "utf-8"
-
-    @property
-    def language(self):
-        return ""
-
-    def feed(self, byte_str):
-        for c in byte_str:
-            coding_state = self.coding_sm.next_state(c)
-            if coding_state == MachineState.ERROR:
-                self._state = ProbingState.NOT_ME
-                break
-            elif coding_state == MachineState.ITS_ME:
-                self._state = ProbingState.FOUND_IT
-                break
-            elif coding_state == MachineState.START:
-                if self.coding_sm.get_current_charlen() >= 2:
-                    self._num_mb_chars += 1
-
-        if self.state == ProbingState.DETECTING:
-            if self.get_confidence() > self.SHORTCUT_THRESHOLD:
-                self._state = ProbingState.FOUND_IT
-
-        return self.state
-
-    def get_confidence(self):
-        unlike = 0.99
-        if self._num_mb_chars < 6:
-            unlike *= self.ONE_CHAR_PROB ** self._num_mb_chars
-            return 1.0 - unlike
-        else:
-            return unlike
diff --git a/venv/lib/python3.7/site-packages/chardet/version.py b/venv/lib/python3.7/site-packages/chardet/version.py
deleted file mode 100644
index bb2a34a..0000000
--- a/venv/lib/python3.7/site-packages/chardet/version.py
+++ /dev/null
@@ -1,9 +0,0 @@
-"""
-This module exists only to simplify retrieving the version number of chardet
-from within setup.py and from chardet subpackages.
-
-:author: Dan Blanchard (dan.blanchard@gmail.com)
-"""
-
-__version__ = "3.0.4"
-VERSION = __version__.split('.')
diff --git a/venv/lib/python3.7/site-packages/easy-install.pth b/venv/lib/python3.7/site-packages/easy-install.pth
deleted file mode 100644
index b74fe2e..0000000
--- a/venv/lib/python3.7/site-packages/easy-install.pth
+++ /dev/null
@@ -1,2 +0,0 @@
-./setuptools-40.8.0-py3.7.egg
-./pip-19.0.3-py3.7.egg
diff --git a/venv/lib/python3.7/site-packages/idna-2.8.dist-info/INSTALLER b/venv/lib/python3.7/site-packages/idna-2.8.dist-info/INSTALLER
deleted file mode 100644
index a1b589e..0000000
--- a/venv/lib/python3.7/site-packages/idna-2.8.dist-info/INSTALLER
+++ /dev/null
@@ -1 +0,0 @@
-pip
diff --git a/venv/lib/python3.7/site-packages/idna-2.8.dist-info/LICENSE.rst b/venv/lib/python3.7/site-packages/idna-2.8.dist-info/LICENSE.rst
deleted file mode 100644
index 3ee64fb..0000000
--- a/venv/lib/python3.7/site-packages/idna-2.8.dist-info/LICENSE.rst
+++ /dev/null
@@ -1,80 +0,0 @@
-License
--------
-
-Copyright (c) 2013-2018, Kim Davies. All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are met:
-
-#. Redistributions of source code must retain the above copyright
-   notice, this list of conditions and the following disclaimer.
-
-#. Redistributions in binary form must reproduce the above
-   copyright notice, this list of conditions and the following
-   disclaimer in the documentation and/or other materials provided with
-   the distribution.
-
-#. Neither the name of the copyright holder nor the names of the 
-   contributors may be used to endorse or promote products derived 
-   from this software without specific prior written permission.
-
-#. THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS "AS IS" AND ANY
-   EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-   PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR 
-   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
-   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
-   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
-   USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
-   DAMAGE.
-
-Portions of the codec implementation and unit tests are derived from the
-Python standard library, which carries the `Python Software Foundation
-License <https://docs.python.org/2/license.html>`_:
-
-   Copyright (c) 2001-2014 Python Software Foundation; All Rights Reserved
-
-Portions of the unit tests are derived from the Unicode standard, which 
-is subject to the Unicode, Inc. License Agreement:
-
-   Copyright (c) 1991-2014 Unicode, Inc. All rights reserved.
-   Distributed under the Terms of Use in 
-   <http://www.unicode.org/copyright.html>.
-
-   Permission is hereby granted, free of charge, to any person obtaining
-   a copy of the Unicode data files and any associated documentation
-   (the "Data Files") or Unicode software and any associated documentation
-   (the "Software") to deal in the Data Files or Software
-   without restriction, including without limitation the rights to use,
-   copy, modify, merge, publish, distribute, and/or sell copies of
-   the Data Files or Software, and to permit persons to whom the Data Files
-   or Software are furnished to do so, provided that
-   
-   (a) this copyright and permission notice appear with all copies 
-   of the Data Files or Software,
-
-   (b) this copyright and permission notice appear in associated 
-   documentation, and
-
-   (c) there is clear notice in each modified Data File or in the Software
-   as well as in the documentation associated with the Data File(s) or
-   Software that the data or software has been modified.
-
-   THE DATA FILES AND SOFTWARE ARE PROVIDED "AS IS", WITHOUT WARRANTY OF
-   ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
-   WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-   NONINFRINGEMENT OF THIRD PARTY RIGHTS.
-   IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN THIS
-   NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL
-   DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
-   DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
-   TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
-   PERFORMANCE OF THE DATA FILES OR SOFTWARE.
-
-   Except as contained in this notice, the name of a copyright holder
-   shall not be used in advertising or otherwise to promote the sale,
-   use or other dealings in these Data Files or Software without prior
-   written authorization of the copyright holder.
diff --git a/venv/lib/python3.7/site-packages/idna-2.8.dist-info/METADATA b/venv/lib/python3.7/site-packages/idna-2.8.dist-info/METADATA
deleted file mode 100644
index 30fde02..0000000
--- a/venv/lib/python3.7/site-packages/idna-2.8.dist-info/METADATA
+++ /dev/null
@@ -1,239 +0,0 @@
-Metadata-Version: 2.1
-Name: idna
-Version: 2.8
-Summary: Internationalized Domain Names in Applications (IDNA)
-Home-page: https://github.com/kjd/idna
-Author: Kim Davies
-Author-email: kim@cynosure.com.au
-License: BSD-like
-Platform: UNKNOWN
-Classifier: Development Status :: 5 - Production/Stable
-Classifier: Intended Audience :: Developers
-Classifier: Intended Audience :: System Administrators
-Classifier: License :: OSI Approved :: BSD License
-Classifier: Operating System :: OS Independent
-Classifier: Programming Language :: Python
-Classifier: Programming Language :: Python :: 2
-Classifier: Programming Language :: Python :: 2.7
-Classifier: Programming Language :: Python :: 3
-Classifier: Programming Language :: Python :: 3.4
-Classifier: Programming Language :: Python :: 3.5
-Classifier: Programming Language :: Python :: 3.6
-Classifier: Topic :: Internet :: Name Service (DNS)
-Classifier: Topic :: Software Development :: Libraries :: Python Modules
-Classifier: Topic :: Utilities
-Requires-Python: >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*
-
-Internationalized Domain Names in Applications (IDNA)
-=====================================================
-
-Support for the Internationalised Domain Names in Applications
-(IDNA) protocol as specified in `RFC 5891 <http://tools.ietf.org/html/rfc5891>`_.
-This is the latest version of the protocol and is sometimes referred to as
-“IDNA 2008”.
-
-This library also provides support for Unicode Technical Standard 46,
-`Unicode IDNA Compatibility Processing <http://unicode.org/reports/tr46/>`_.
-
-This acts as a suitable replacement for the “encodings.idna” module that
-comes with the Python standard library, but only supports the
-old, deprecated IDNA specification (`RFC 3490 <http://tools.ietf.org/html/rfc3490>`_).
-
-Basic functions are simply executed:
-
-.. code-block:: pycon
-
-    # Python 3
-    >>> import idna
-    >>> idna.encode('ドメイン.テスト')
-    b'xn--eckwd4c7c.xn--zckzah'
-    >>> print(idna.decode('xn--eckwd4c7c.xn--zckzah'))
-    ドメイン.テスト
-
-    # Python 2
-    >>> import idna
-    >>> idna.encode(u'ドメイン.テスト')
-    'xn--eckwd4c7c.xn--zckzah'
-    >>> print idna.decode('xn--eckwd4c7c.xn--zckzah')
-    ドメイン.テスト
-
-Packages
---------
-
-The latest tagged release version is published in the PyPI repository:
-
-.. image:: https://badge.fury.io/py/idna.svg
-   :target: http://badge.fury.io/py/idna
-
-
-Installation
-------------
-
-To install this library, you can use pip:
-
-.. code-block:: bash
-
-    $ pip install idna
-
-Alternatively, you can install the package using the bundled setup script:
-
-.. code-block:: bash
-
-    $ python setup.py install
-
-This library works with Python 2.7 and Python 3.4 or later.
-
-
-Usage
------
-
-For typical usage, the ``encode`` and ``decode`` functions will take a domain
-name argument and perform a conversion to A-labels or U-labels respectively.
-
-.. code-block:: pycon
-
-    # Python 3
-    >>> import idna
-    >>> idna.encode('ドメイン.テスト')
-    b'xn--eckwd4c7c.xn--zckzah'
-    >>> print(idna.decode('xn--eckwd4c7c.xn--zckzah'))
-    ドメイン.テスト
-
-You may use the codec encoding and decoding methods using the
-``idna.codec`` module:
-
-.. code-block:: pycon
-
-    # Python 2
-    >>> import idna.codec
-    >>> print u'домена.испытание'.encode('idna')
-    xn--80ahd1agd.xn--80akhbyknj4f
-    >>> print 'xn--80ahd1agd.xn--80akhbyknj4f'.decode('idna')
-    домена.испытание
-
-Conversions can be applied at a per-label basis using the ``ulabel`` or ``alabel``
-functions if necessary:
-
-.. code-block:: pycon
-
-    # Python 2
-    >>> idna.alabel(u'测试')
-    'xn--0zwm56d'
-
-Compatibility Mapping (UTS #46)
-+++++++++++++++++++++++++++++++
-
-As described in `RFC 5895 <http://tools.ietf.org/html/rfc5895>`_, the IDNA
-specification no longer normalizes input from different potential ways a user
-may input a domain name. This functionality, known as a “mapping”, is now
-considered by the specification to be a local user-interface issue distinct
-from IDNA conversion functionality.
-
-This library provides one such mapping, that was developed by the Unicode
-Consortium. Known as `Unicode IDNA Compatibility Processing <http://unicode.org/reports/tr46/>`_,
-it provides for both a regular mapping for typical applications, as well as
-a transitional mapping to help migrate from older IDNA 2003 applications.
-
-For example, “Königsgäßchen” is not a permissible label as *LATIN CAPITAL
-LETTER K* is not allowed (nor are capital letters in general). UTS 46 will
-convert this into lower case prior to applying the IDNA conversion.
-
-.. code-block:: pycon
-
-    # Python 3
-    >>> import idna
-    >>> idna.encode(u'Königsgäßchen')
-    ...
-    idna.core.InvalidCodepoint: Codepoint U+004B at position 1 of 'Königsgäßchen' not allowed
-    >>> idna.encode('Königsgäßchen', uts46=True)
-    b'xn--knigsgchen-b4a3dun'
-    >>> print(idna.decode('xn--knigsgchen-b4a3dun'))
-    königsgäßchen
-
-Transitional processing provides conversions to help transition from the older
-2003 standard to the current standard. For example, in the original IDNA
-specification, the *LATIN SMALL LETTER SHARP S* (ß) was converted into two
-*LATIN SMALL LETTER S* (ss), whereas in the current IDNA specification this
-conversion is not performed.
-
-.. code-block:: pycon
-
-    # Python 2
-    >>> idna.encode(u'Königsgäßchen', uts46=True, transitional=True)
-    'xn--knigsgsschen-lcb0w'
-
-Implementors should use transitional processing with caution, only in rare
-cases where conversion from legacy labels to current labels must be performed
-(i.e. IDNA implementations that pre-date 2008). For typical applications
-that just need to convert labels, transitional processing is unlikely to be
-beneficial and could produce unexpected incompatible results.
-
-``encodings.idna`` Compatibility
-++++++++++++++++++++++++++++++++
-
-Function calls from the Python built-in ``encodings.idna`` module are
-mapped to their IDNA 2008 equivalents using the ``idna.compat`` module.
-Simply substitute the ``import`` clause in your code to refer to the
-new module name.
-
-Exceptions
-----------
-
-All errors raised during the conversion following the specification should
-raise an exception derived from the ``idna.IDNAError`` base class.
-
-More specific exceptions that may be generated as ``idna.IDNABidiError``
-when the error reflects an illegal combination of left-to-right and right-to-left
-characters in a label; ``idna.InvalidCodepoint`` when a specific codepoint is
-an illegal character in an IDN label (i.e. INVALID); and ``idna.InvalidCodepointContext``
-when the codepoint is illegal based on its positional context (i.e. it is CONTEXTO
-or CONTEXTJ but the contextual requirements are not satisfied.)
-
-Building and Diagnostics
-------------------------
-
-The IDNA and UTS 46 functionality relies upon pre-calculated lookup tables for
-performance. These tables are derived from computing against eligibility criteria
-in the respective standards. These tables are computed using the command-line
-script ``tools/idna-data``.
-
-This tool will fetch relevant tables from the Unicode Consortium and perform the
-required calculations to identify eligibility. It has three main modes:
-
-* ``idna-data make-libdata``. Generates ``idnadata.py`` and ``uts46data.py``,
-  the pre-calculated lookup tables using for IDNA and UTS 46 conversions. Implementors
-  who wish to track this library against a different Unicode version may use this tool
-  to manually generate a different version of the ``idnadata.py`` and ``uts46data.py``
-  files.
-
-* ``idna-data make-table``. Generate a table of the IDNA disposition
-  (e.g. PVALID, CONTEXTJ, CONTEXTO) in the format found in Appendix B.1 of RFC
-  5892 and the pre-computed tables published by `IANA <http://iana.org/>`_.
-
-* ``idna-data U+0061``. Prints debugging output on the various properties
-  associated with an individual Unicode codepoint (in this case, U+0061), that are
-  used to assess the IDNA and UTS 46 status of a codepoint. This is helpful in debugging
-  or analysis.
-
-The tool accepts a number of arguments, described using ``idna-data -h``. Most notably,
-the ``--version`` argument allows the specification of the version of Unicode to use
-in computing the table data. For example, ``idna-data --version 9.0.0 make-libdata``
-will generate library data against Unicode 9.0.0.
-
-Note that this script requires Python 3, but all generated library data will work
-in Python 2.7.
-
-
-Testing
--------
-
-The library has a test suite based on each rule of the IDNA specification, as
-well as tests that are provided as part of the Unicode Technical Standard 46,
-`Unicode IDNA Compatibility Processing <http://unicode.org/reports/tr46/>`_.
-
-The tests are run automatically on each commit at Travis CI:
-
-.. image:: https://travis-ci.org/kjd/idna.svg?branch=master
-   :target: https://travis-ci.org/kjd/idna
-
-
diff --git a/venv/lib/python3.7/site-packages/idna-2.8.dist-info/RECORD b/venv/lib/python3.7/site-packages/idna-2.8.dist-info/RECORD
deleted file mode 100644
index 8d4bc61..0000000
--- a/venv/lib/python3.7/site-packages/idna-2.8.dist-info/RECORD
+++ /dev/null
@@ -1,22 +0,0 @@
-idna-2.8.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
-idna-2.8.dist-info/LICENSE.rst,sha256=DUvHq9SNz7FOJCVO5AQGZzf_AWcUTiIpFKIRO4eUaD4,3947
-idna-2.8.dist-info/METADATA,sha256=X4QsM_BLMPhl4gC8SEnXjvl5-gj7hvwAl7UCyR418so,8862
-idna-2.8.dist-info/RECORD,,
-idna-2.8.dist-info/WHEEL,sha256=CihQvCnsGZQBGAHLEUMf0IdA4fRduS_NBUTMgCTtvPM,110
-idna-2.8.dist-info/top_level.txt,sha256=jSag9sEDqvSPftxOQy-ABfGV_RSy7oFh4zZJpODV8k0,5
-idna/__init__.py,sha256=9Nt7xpyet3DmOrPUGooDdAwmHZZu1qUAy2EaJ93kGiQ,58
-idna/__pycache__/__init__.cpython-37.pyc,,
-idna/__pycache__/codec.cpython-37.pyc,,
-idna/__pycache__/compat.cpython-37.pyc,,
-idna/__pycache__/core.cpython-37.pyc,,
-idna/__pycache__/idnadata.cpython-37.pyc,,
-idna/__pycache__/intranges.cpython-37.pyc,,
-idna/__pycache__/package_data.cpython-37.pyc,,
-idna/__pycache__/uts46data.cpython-37.pyc,,
-idna/codec.py,sha256=lvYb7yu7PhAqFaAIAdWcwgaWI2UmgseUua-1c0AsG0A,3299
-idna/compat.py,sha256=R-h29D-6mrnJzbXxymrWUW7iZUvy-26TQwZ0ij57i4U,232
-idna/core.py,sha256=JDCZZ_PLESqIgEbU8mPyoEufWwoOiIqygA17-QZIe3s,11733
-idna/idnadata.py,sha256=HXaPFw6_YAJ0qppACPu0YLAULtRs3QovRM_CCZHGdY0,40899
-idna/intranges.py,sha256=TY1lpxZIQWEP6tNqjZkFA5hgoMWOj1OBmnUG8ihT87E,1749
-idna/package_data.py,sha256=kIzeKKXEouXLR4srqwf9Q3zv-NffKSOz5aSDOJARPB0,21
-idna/uts46data.py,sha256=oLyNZ1pBaiBlj9zFzLFRd_P7J8MkRcgDisjExZR_4MY,198292
diff --git a/venv/lib/python3.7/site-packages/idna-2.8.dist-info/WHEEL b/venv/lib/python3.7/site-packages/idna-2.8.dist-info/WHEEL
deleted file mode 100644
index dea0e20..0000000
--- a/venv/lib/python3.7/site-packages/idna-2.8.dist-info/WHEEL
+++ /dev/null
@@ -1,6 +0,0 @@
-Wheel-Version: 1.0
-Generator: bdist_wheel (0.32.2)
-Root-Is-Purelib: true
-Tag: py2-none-any
-Tag: py3-none-any
-
diff --git a/venv/lib/python3.7/site-packages/idna-2.8.dist-info/top_level.txt b/venv/lib/python3.7/site-packages/idna-2.8.dist-info/top_level.txt
deleted file mode 100644
index c40472e..0000000
--- a/venv/lib/python3.7/site-packages/idna-2.8.dist-info/top_level.txt
+++ /dev/null
@@ -1 +0,0 @@
-idna
diff --git a/venv/lib/python3.7/site-packages/idna/__init__.py b/venv/lib/python3.7/site-packages/idna/__init__.py
deleted file mode 100644
index 847bf93..0000000
--- a/venv/lib/python3.7/site-packages/idna/__init__.py
+++ /dev/null
@@ -1,2 +0,0 @@
-from .package_data import __version__
-from .core import *
diff --git a/venv/lib/python3.7/site-packages/idna/codec.py b/venv/lib/python3.7/site-packages/idna/codec.py
deleted file mode 100644
index 98c65ea..0000000
--- a/venv/lib/python3.7/site-packages/idna/codec.py
+++ /dev/null
@@ -1,118 +0,0 @@
-from .core import encode, decode, alabel, ulabel, IDNAError
-import codecs
-import re
-
-_unicode_dots_re = re.compile(u'[\u002e\u3002\uff0e\uff61]')
-
-class Codec(codecs.Codec):
-
-    def encode(self, data, errors='strict'):
-
-        if errors != 'strict':
-            raise IDNAError("Unsupported error handling \"{0}\"".format(errors))
-
-        if not data:
-            return "", 0
-
-        return encode(data), len(data)
-
-    def decode(self, data, errors='strict'):
-
-        if errors != 'strict':
-            raise IDNAError("Unsupported error handling \"{0}\"".format(errors))
-
-        if not data:
-            return u"", 0
-
-        return decode(data), len(data)
-
-class IncrementalEncoder(codecs.BufferedIncrementalEncoder):
-    def _buffer_encode(self, data, errors, final):
-        if errors != 'strict':
-            raise IDNAError("Unsupported error handling \"{0}\"".format(errors))
-
-        if not data:
-            return ("", 0)
-
-        labels = _unicode_dots_re.split(data)
-        trailing_dot = u''
-        if labels:
-            if not labels[-1]:
-                trailing_dot = '.'
-                del labels[-1]
-            elif not final:
-                # Keep potentially unfinished label until the next call
-                del labels[-1]
-                if labels:
-                    trailing_dot = '.'
-
-        result = []
-        size = 0
-        for label in labels:
-            result.append(alabel(label))
-            if size:
-                size += 1
-            size += len(label)
-
-        # Join with U+002E
-        result = ".".join(result) + trailing_dot
-        size += len(trailing_dot)
-        return (result, size)
-
-class IncrementalDecoder(codecs.BufferedIncrementalDecoder):
-    def _buffer_decode(self, data, errors, final):
-        if errors != 'strict':
-            raise IDNAError("Unsupported error handling \"{0}\"".format(errors))
-
-        if not data:
-            return (u"", 0)
-
-        # IDNA allows decoding to operate on Unicode strings, too.
-        if isinstance(data, unicode):
-            labels = _unicode_dots_re.split(data)
-        else:
-            # Must be ASCII string
-            data = str(data)
-            unicode(data, "ascii")
-            labels = data.split(".")
-
-        trailing_dot = u''
-        if labels:
-            if not labels[-1]:
-                trailing_dot = u'.'
-                del labels[-1]
-            elif not final:
-                # Keep potentially unfinished label until the next call
-                del labels[-1]
-                if labels:
-                    trailing_dot = u'.'
-
-        result = []
-        size = 0
-        for label in labels:
-            result.append(ulabel(label))
-            if size:
-                size += 1
-            size += len(label)
-
-        result = u".".join(result) + trailing_dot
-        size += len(trailing_dot)
-        return (result, size)
-
-
-class StreamWriter(Codec, codecs.StreamWriter):
-    pass
-
-class StreamReader(Codec, codecs.StreamReader):
-    pass
-
-def getregentry():
-    return codecs.CodecInfo(
-        name='idna',
-        encode=Codec().encode,
-        decode=Codec().decode,
-        incrementalencoder=IncrementalEncoder,
-        incrementaldecoder=IncrementalDecoder,
-        streamwriter=StreamWriter,
-        streamreader=StreamReader,
-    )
diff --git a/venv/lib/python3.7/site-packages/idna/compat.py b/venv/lib/python3.7/site-packages/idna/compat.py
deleted file mode 100644
index 4d47f33..0000000
--- a/venv/lib/python3.7/site-packages/idna/compat.py
+++ /dev/null
@@ -1,12 +0,0 @@
-from .core import *
-from .codec import *
-
-def ToASCII(label):
-    return encode(label)
-
-def ToUnicode(label):
-    return decode(label)
-
-def nameprep(s):
-    raise NotImplementedError("IDNA 2008 does not utilise nameprep protocol")
-
diff --git a/venv/lib/python3.7/site-packages/idna/core.py b/venv/lib/python3.7/site-packages/idna/core.py
deleted file mode 100644
index 104624a..0000000
--- a/venv/lib/python3.7/site-packages/idna/core.py
+++ /dev/null
@@ -1,396 +0,0 @@
-from . import idnadata
-import bisect
-import unicodedata
-import re
-import sys
-from .intranges import intranges_contain
-
-_virama_combining_class = 9
-_alabel_prefix = b'xn--'
-_unicode_dots_re = re.compile(u'[\u002e\u3002\uff0e\uff61]')
-
-if sys.version_info[0] == 3:
-    unicode = str
-    unichr = chr
-
-class IDNAError(UnicodeError):
-    """ Base exception for all IDNA-encoding related problems """
-    pass
-
-
-class IDNABidiError(IDNAError):
-    """ Exception when bidirectional requirements are not satisfied """
-    pass
-
-
-class InvalidCodepoint(IDNAError):
-    """ Exception when a disallowed or unallocated codepoint is used """
-    pass
-
-
-class InvalidCodepointContext(IDNAError):
-    """ Exception when the codepoint is not valid in the context it is used """
-    pass
-
-
-def _combining_class(cp):
-    v = unicodedata.combining(unichr(cp))
-    if v == 0:
-        if not unicodedata.name(unichr(cp)):
-            raise ValueError("Unknown character in unicodedata")
-    return v
-
-def _is_script(cp, script):
-    return intranges_contain(ord(cp), idnadata.scripts[script])
-
-def _punycode(s):
-    return s.encode('punycode')
-
-def _unot(s):
-    return 'U+{0:04X}'.format(s)
-
-
-def valid_label_length(label):
-
-    if len(label) > 63:
-        return False
-    return True
-
-
-def valid_string_length(label, trailing_dot):
-
-    if len(label) > (254 if trailing_dot else 253):
-        return False
-    return True
-
-
-def check_bidi(label, check_ltr=False):
-
-    # Bidi rules should only be applied if string contains RTL characters
-    bidi_label = False
-    for (idx, cp) in enumerate(label, 1):
-        direction = unicodedata.bidirectional(cp)
-        if direction == '':
-            # String likely comes from a newer version of Unicode
-            raise IDNABidiError('Unknown directionality in label {0} at position {1}'.format(repr(label), idx))
-        if direction in ['R', 'AL', 'AN']:
-            bidi_label = True
-    if not bidi_label and not check_ltr:
-        return True
-
-    # Bidi rule 1
-    direction = unicodedata.bidirectional(label[0])
-    if direction in ['R', 'AL']:
-        rtl = True
-    elif direction == 'L':
-        rtl = False
-    else:
-        raise IDNABidiError('First codepoint in label {0} must be directionality L, R or AL'.format(repr(label)))
-
-    valid_ending = False
-    number_type = False
-    for (idx, cp) in enumerate(label, 1):
-        direction = unicodedata.bidirectional(cp)
-
-        if rtl:
-            # Bidi rule 2
-            if not direction in ['R', 'AL', 'AN', 'EN', 'ES', 'CS', 'ET', 'ON', 'BN', 'NSM']:
-                raise IDNABidiError('Invalid direction for codepoint at position {0} in a right-to-left label'.format(idx))
-            # Bidi rule 3
-            if direction in ['R', 'AL', 'EN', 'AN']:
-                valid_ending = True
-            elif direction != 'NSM':
-                valid_ending = False
-            # Bidi rule 4
-            if direction in ['AN', 'EN']:
-                if not number_type:
-                    number_type = direction
-                else:
-                    if number_type != direction:
-                        raise IDNABidiError('Can not mix numeral types in a right-to-left label')
-        else:
-            # Bidi rule 5
-            if not direction in ['L', 'EN', 'ES', 'CS', 'ET', 'ON', 'BN', 'NSM']:
-                raise IDNABidiError('Invalid direction for codepoint at position {0} in a left-to-right label'.format(idx))
-            # Bidi rule 6
-            if direction in ['L', 'EN']:
-                valid_ending = True
-            elif direction != 'NSM':
-                valid_ending = False
-
-    if not valid_ending:
-        raise IDNABidiError('Label ends with illegal codepoint directionality')
-
-    return True
-
-
-def check_initial_combiner(label):
-
-    if unicodedata.category(label[0])[0] == 'M':
-        raise IDNAError('Label begins with an illegal combining character')
-    return True
-
-
-def check_hyphen_ok(label):
-
-    if label[2:4] == '--':
-        raise IDNAError('Label has disallowed hyphens in 3rd and 4th position')
-    if label[0] == '-' or label[-1] == '-':
-        raise IDNAError('Label must not start or end with a hyphen')
-    return True
-
-
-def check_nfc(label):
-
-    if unicodedata.normalize('NFC', label) != label:
-        raise IDNAError('Label must be in Normalization Form C')
-
-
-def valid_contextj(label, pos):
-
-    cp_value = ord(label[pos])
-
-    if cp_value == 0x200c:
-
-        if pos > 0:
-            if _combining_class(ord(label[pos - 1])) == _virama_combining_class:
-                return True
-
-        ok = False
-        for i in range(pos-1, -1, -1):
-            joining_type = idnadata.joining_types.get(ord(label[i]))
-            if joining_type == ord('T'):
-                continue
-            if joining_type in [ord('L'), ord('D')]:
-                ok = True
-                break
-
-        if not ok:
-            return False
-
-        ok = False
-        for i in range(pos+1, len(label)):
-            joining_type = idnadata.joining_types.get(ord(label[i]))
-            if joining_type == ord('T'):
-                continue
-            if joining_type in [ord('R'), ord('D')]:
-                ok = True
-                break
-        return ok
-
-    if cp_value == 0x200d:
-
-        if pos > 0:
-            if _combining_class(ord(label[pos - 1])) == _virama_combining_class:
-                return True
-        return False
-
-    else:
-
-        return False
-
-
-def valid_contexto(label, pos, exception=False):
-
-    cp_value = ord(label[pos])
-
-    if cp_value == 0x00b7:
-        if 0 < pos < len(label)-1:
-            if ord(label[pos - 1]) == 0x006c and ord(label[pos + 1]) == 0x006c:
-                return True
-        return False
-
-    elif cp_value == 0x0375:
-        if pos < len(label)-1 and len(label) > 1:
-            return _is_script(label[pos + 1], 'Greek')
-        return False
-
-    elif cp_value == 0x05f3 or cp_value == 0x05f4:
-        if pos > 0:
-            return _is_script(label[pos - 1], 'Hebrew')
-        return False
-
-    elif cp_value == 0x30fb:
-        for cp in label:
-            if cp == u'\u30fb':
-                continue
-            if _is_script(cp, 'Hiragana') or _is_script(cp, 'Katakana') or _is_script(cp, 'Han'):
-                return True
-        return False
-
-    elif 0x660 <= cp_value <= 0x669:
-        for cp in label:
-            if 0x6f0 <= ord(cp) <= 0x06f9:
-                return False
-        return True
-
-    elif 0x6f0 <= cp_value <= 0x6f9:
-        for cp in label:
-            if 0x660 <= ord(cp) <= 0x0669:
-                return False
-        return True
-
-
-def check_label(label):
-
-    if isinstance(label, (bytes, bytearray)):
-        label = label.decode('utf-8')
-    if len(label) == 0:
-        raise IDNAError('Empty Label')
-
-    check_nfc(label)
-    check_hyphen_ok(label)
-    check_initial_combiner(label)
-
-    for (pos, cp) in enumerate(label):
-        cp_value = ord(cp)
-        if intranges_contain(cp_value, idnadata.codepoint_classes['PVALID']):
-            continue
-        elif intranges_contain(cp_value, idnadata.codepoint_classes['CONTEXTJ']):
-            try:
-                if not valid_contextj(label, pos):
-                    raise InvalidCodepointContext('Joiner {0} not allowed at position {1} in {2}'.format(
-                        _unot(cp_value), pos+1, repr(label)))
-            except ValueError:
-                raise IDNAError('Unknown codepoint adjacent to joiner {0} at position {1} in {2}'.format(
-                    _unot(cp_value), pos+1, repr(label)))
-        elif intranges_contain(cp_value, idnadata.codepoint_classes['CONTEXTO']):
-            if not valid_contexto(label, pos):
-                raise InvalidCodepointContext('Codepoint {0} not allowed at position {1} in {2}'.format(_unot(cp_value), pos+1, repr(label)))
-        else:
-            raise InvalidCodepoint('Codepoint {0} at position {1} of {2} not allowed'.format(_unot(cp_value), pos+1, repr(label)))
-
-    check_bidi(label)
-
-
-def alabel(label):
-
-    try:
-        label = label.encode('ascii')
-        ulabel(label)
-        if not valid_label_length(label):
-            raise IDNAError('Label too long')
-        return label
-    except UnicodeEncodeError:
-        pass
-
-    if not label:
-        raise IDNAError('No Input')
-
-    label = unicode(label)
-    check_label(label)
-    label = _punycode(label)
-    label = _alabel_prefix + label
-
-    if not valid_label_length(label):
-        raise IDNAError('Label too long')
-
-    return label
-
-
-def ulabel(label):
-
-    if not isinstance(label, (bytes, bytearray)):
-        try:
-            label = label.encode('ascii')
-        except UnicodeEncodeError:
-            check_label(label)
-            return label
-
-    label = label.lower()
-    if label.startswith(_alabel_prefix):
-        label = label[len(_alabel_prefix):]
-    else:
-        check_label(label)
-        return label.decode('ascii')
-
-    label = label.decode('punycode')
-    check_label(label)
-    return label
-
-
-def uts46_remap(domain, std3_rules=True, transitional=False):
-    """Re-map the characters in the string according to UTS46 processing."""
-    from .uts46data import uts46data
-    output = u""
-    try:
-        for pos, char in enumerate(domain):
-            code_point = ord(char)
-            uts46row = uts46data[code_point if code_point < 256 else
-                bisect.bisect_left(uts46data, (code_point, "Z")) - 1]
-            status = uts46row[1]
-            replacement = uts46row[2] if len(uts46row) == 3 else None
-            if (status == "V" or
-                    (status == "D" and not transitional) or
-                    (status == "3" and not std3_rules and replacement is None)):
-                output += char
-            elif replacement is not None and (status == "M" or
-                    (status == "3" and not std3_rules) or
-                    (status == "D" and transitional)):
-                output += replacement
-            elif status != "I":
-                raise IndexError()
-        return unicodedata.normalize("NFC", output)
-    except IndexError:
-        raise InvalidCodepoint(
-            "Codepoint {0} not allowed at position {1} in {2}".format(
-            _unot(code_point), pos + 1, repr(domain)))
-
-
-def encode(s, strict=False, uts46=False, std3_rules=False, transitional=False):
-
-    if isinstance(s, (bytes, bytearray)):
-        s = s.decode("ascii")
-    if uts46:
-        s = uts46_remap(s, std3_rules, transitional)
-    trailing_dot = False
-    result = []
-    if strict:
-        labels = s.split('.')
-    else:
-        labels = _unicode_dots_re.split(s)
-    if not labels or labels == ['']:
-        raise IDNAError('Empty domain')
-    if labels[-1] == '':
-        del labels[-1]
-        trailing_dot = True
-    for label in labels:
-        s = alabel(label)
-        if s:
-            result.append(s)
-        else:
-            raise IDNAError('Empty label')
-    if trailing_dot:
-        result.append(b'')
-    s = b'.'.join(result)
-    if not valid_string_length(s, trailing_dot):
-        raise IDNAError('Domain too long')
-    return s
-
-
-def decode(s, strict=False, uts46=False, std3_rules=False):
-
-    if isinstance(s, (bytes, bytearray)):
-        s = s.decode("ascii")
-    if uts46:
-        s = uts46_remap(s, std3_rules, False)
-    trailing_dot = False
-    result = []
-    if not strict:
-        labels = _unicode_dots_re.split(s)
-    else:
-        labels = s.split(u'.')
-    if not labels or labels == ['']:
-        raise IDNAError('Empty domain')
-    if not labels[-1]:
-        del labels[-1]
-        trailing_dot = True
-    for label in labels:
-        s = ulabel(label)
-        if s:
-            result.append(s)
-        else:
-            raise IDNAError('Empty label')
-    if trailing_dot:
-        result.append(u'')
-    return u'.'.join(result)
diff --git a/venv/lib/python3.7/site-packages/idna/idnadata.py b/venv/lib/python3.7/site-packages/idna/idnadata.py
deleted file mode 100644
index a80c959..0000000
--- a/venv/lib/python3.7/site-packages/idna/idnadata.py
+++ /dev/null
@@ -1,1979 +0,0 @@
-# This file is automatically generated by tools/idna-data
-
-__version__ = "11.0.0"
-scripts = {
-    'Greek': (
-        0x37000000374,
-        0x37500000378,
-        0x37a0000037e,
-        0x37f00000380,
-        0x38400000385,
-        0x38600000387,
-        0x3880000038b,
-        0x38c0000038d,
-        0x38e000003a2,
-        0x3a3000003e2,
-        0x3f000000400,
-        0x1d2600001d2b,
-        0x1d5d00001d62,
-        0x1d6600001d6b,
-        0x1dbf00001dc0,
-        0x1f0000001f16,
-        0x1f1800001f1e,
-        0x1f2000001f46,
-        0x1f4800001f4e,
-        0x1f5000001f58,
-        0x1f5900001f5a,
-        0x1f5b00001f5c,
-        0x1f5d00001f5e,
-        0x1f5f00001f7e,
-        0x1f8000001fb5,
-        0x1fb600001fc5,
-        0x1fc600001fd4,
-        0x1fd600001fdc,
-        0x1fdd00001ff0,
-        0x1ff200001ff5,
-        0x1ff600001fff,
-        0x212600002127,
-        0xab650000ab66,
-        0x101400001018f,
-        0x101a0000101a1,
-        0x1d2000001d246,
-    ),
-    'Han': (
-        0x2e8000002e9a,
-        0x2e9b00002ef4,
-        0x2f0000002fd6,
-        0x300500003006,
-        0x300700003008,
-        0x30210000302a,
-        0x30380000303c,
-        0x340000004db6,
-        0x4e0000009ff0,
-        0xf9000000fa6e,
-        0xfa700000fada,
-        0x200000002a6d7,
-        0x2a7000002b735,
-        0x2b7400002b81e,
-        0x2b8200002cea2,
-        0x2ceb00002ebe1,
-        0x2f8000002fa1e,
-    ),
-    'Hebrew': (
-        0x591000005c8,
-        0x5d0000005eb,
-        0x5ef000005f5,
-        0xfb1d0000fb37,
-        0xfb380000fb3d,
-        0xfb3e0000fb3f,
-        0xfb400000fb42,
-        0xfb430000fb45,
-        0xfb460000fb50,
-    ),
-    'Hiragana': (
-        0x304100003097,
-        0x309d000030a0,
-        0x1b0010001b11f,
-        0x1f2000001f201,
-    ),
-    'Katakana': (
-        0x30a1000030fb,
-        0x30fd00003100,
-        0x31f000003200,
-        0x32d0000032ff,
-        0x330000003358,
-        0xff660000ff70,
-        0xff710000ff9e,
-        0x1b0000001b001,
-    ),
-}
-joining_types = {
-    0x600: 85,
-    0x601: 85,
-    0x602: 85,
-    0x603: 85,
-    0x604: 85,
-    0x605: 85,
-    0x608: 85,
-    0x60b: 85,
-    0x620: 68,
-    0x621: 85,
-    0x622: 82,
-    0x623: 82,
-    0x624: 82,
-    0x625: 82,
-    0x626: 68,
-    0x627: 82,
-    0x628: 68,
-    0x629: 82,
-    0x62a: 68,
-    0x62b: 68,
-    0x62c: 68,
-    0x62d: 68,
-    0x62e: 68,
-    0x62f: 82,
-    0x630: 82,
-    0x631: 82,
-    0x632: 82,
-    0x633: 68,
-    0x634: 68,
-    0x635: 68,
-    0x636: 68,
-    0x637: 68,
-    0x638: 68,
-    0x639: 68,
-    0x63a: 68,
-    0x63b: 68,
-    0x63c: 68,
-    0x63d: 68,
-    0x63e: 68,
-    0x63f: 68,
-    0x640: 67,
-    0x641: 68,
-    0x642: 68,
-    0x643: 68,
-    0x644: 68,
-    0x645: 68,
-    0x646: 68,
-    0x647: 68,
-    0x648: 82,
-    0x649: 68,
-    0x64a: 68,
-    0x66e: 68,
-    0x66f: 68,
-    0x671: 82,
-    0x672: 82,
-    0x673: 82,
-    0x674: 85,
-    0x675: 82,
-    0x676: 82,
-    0x677: 82,
-    0x678: 68,
-    0x679: 68,
-    0x67a: 68,
-    0x67b: 68,
-    0x67c: 68,
-    0x67d: 68,
-    0x67e: 68,
-    0x67f: 68,
-    0x680: 68,
-    0x681: 68,
-    0x682: 68,
-    0x683: 68,
-    0x684: 68,
-    0x685: 68,
-    0x686: 68,
-    0x687: 68,
-    0x688: 82,
-    0x689: 82,
-    0x68a: 82,
-    0x68b: 82,
-    0x68c: 82,
-    0x68d: 82,
-    0x68e: 82,
-    0x68f: 82,
-    0x690: 82,
-    0x691: 82,
-    0x692: 82,
-    0x693: 82,
-    0x694: 82,
-    0x695: 82,
-    0x696: 82,
-    0x697: 82,
-    0x698: 82,
-    0x699: 82,
-    0x69a: 68,
-    0x69b: 68,
-    0x69c: 68,
-    0x69d: 68,
-    0x69e: 68,
-    0x69f: 68,
-    0x6a0: 68,
-    0x6a1: 68,
-    0x6a2: 68,
-    0x6a3: 68,
-    0x6a4: 68,
-    0x6a5: 68,
-    0x6a6: 68,
-    0x6a7: 68,
-    0x6a8: 68,
-    0x6a9: 68,
-    0x6aa: 68,
-    0x6ab: 68,
-    0x6ac: 68,
-    0x6ad: 68,
-    0x6ae: 68,
-    0x6af: 68,
-    0x6b0: 68,
-    0x6b1: 68,
-    0x6b2: 68,
-    0x6b3: 68,
-    0x6b4: 68,
-    0x6b5: 68,
-    0x6b6: 68,
-    0x6b7: 68,
-    0x6b8: 68,
-    0x6b9: 68,
-    0x6ba: 68,
-    0x6bb: 68,
-    0x6bc: 68,
-    0x6bd: 68,
-    0x6be: 68,
-    0x6bf: 68,
-    0x6c0: 82,
-    0x6c1: 68,
-    0x6c2: 68,
-    0x6c3: 82,
-    0x6c4: 82,
-    0x6c5: 82,
-    0x6c6: 82,
-    0x6c7: 82,
-    0x6c8: 82,
-    0x6c9: 82,
-    0x6ca: 82,
-    0x6cb: 82,
-    0x6cc: 68,
-    0x6cd: 82,
-    0x6ce: 68,
-    0x6cf: 82,
-    0x6d0: 68,
-    0x6d1: 68,
-    0x6d2: 82,
-    0x6d3: 82,
-    0x6d5: 82,
-    0x6dd: 85,
-    0x6ee: 82,
-    0x6ef: 82,
-    0x6fa: 68,
-    0x6fb: 68,
-    0x6fc: 68,
-    0x6ff: 68,
-    0x70f: 84,
-    0x710: 82,
-    0x712: 68,
-    0x713: 68,
-    0x714: 68,
-    0x715: 82,
-    0x716: 82,
-    0x717: 82,
-    0x718: 82,
-    0x719: 82,
-    0x71a: 68,
-    0x71b: 68,
-    0x71c: 68,
-    0x71d: 68,
-    0x71e: 82,
-    0x71f: 68,
-    0x720: 68,
-    0x721: 68,
-    0x722: 68,
-    0x723: 68,
-    0x724: 68,
-    0x725: 68,
-    0x726: 68,
-    0x727: 68,
-    0x728: 82,
-    0x729: 68,
-    0x72a: 82,
-    0x72b: 68,
-    0x72c: 82,
-    0x72d: 68,
-    0x72e: 68,
-    0x72f: 82,
-    0x74d: 82,
-    0x74e: 68,
-    0x74f: 68,
-    0x750: 68,
-    0x751: 68,
-    0x752: 68,
-    0x753: 68,
-    0x754: 68,
-    0x755: 68,
-    0x756: 68,
-    0x757: 68,
-    0x758: 68,
-    0x759: 82,
-    0x75a: 82,
-    0x75b: 82,
-    0x75c: 68,
-    0x75d: 68,
-    0x75e: 68,
-    0x75f: 68,
-    0x760: 68,
-    0x761: 68,
-    0x762: 68,
-    0x763: 68,
-    0x764: 68,
-    0x765: 68,
-    0x766: 68,
-    0x767: 68,
-    0x768: 68,
-    0x769: 68,
-    0x76a: 68,
-    0x76b: 82,
-    0x76c: 82,
-    0x76d: 68,
-    0x76e: 68,
-    0x76f: 68,
-    0x770: 68,
-    0x771: 82,
-    0x772: 68,
-    0x773: 82,
-    0x774: 82,
-    0x775: 68,
-    0x776: 68,
-    0x777: 68,
-    0x778: 82,
-    0x779: 82,
-    0x77a: 68,
-    0x77b: 68,
-    0x77c: 68,
-    0x77d: 68,
-    0x77e: 68,
-    0x77f: 68,
-    0x7ca: 68,
-    0x7cb: 68,
-    0x7cc: 68,
-    0x7cd: 68,
-    0x7ce: 68,
-    0x7cf: 68,
-    0x7d0: 68,
-    0x7d1: 68,
-    0x7d2: 68,
-    0x7d3: 68,
-    0x7d4: 68,
-    0x7d5: 68,
-    0x7d6: 68,
-    0x7d7: 68,
-    0x7d8: 68,
-    0x7d9: 68,
-    0x7da: 68,
-    0x7db: 68,
-    0x7dc: 68,
-    0x7dd: 68,
-    0x7de: 68,
-    0x7df: 68,
-    0x7e0: 68,
-    0x7e1: 68,
-    0x7e2: 68,
-    0x7e3: 68,
-    0x7e4: 68,
-    0x7e5: 68,
-    0x7e6: 68,
-    0x7e7: 68,
-    0x7e8: 68,
-    0x7e9: 68,
-    0x7ea: 68,
-    0x7fa: 67,
-    0x840: 82,
-    0x841: 68,
-    0x842: 68,
-    0x843: 68,
-    0x844: 68,
-    0x845: 68,
-    0x846: 82,
-    0x847: 82,
-    0x848: 68,
-    0x849: 82,
-    0x84a: 68,
-    0x84b: 68,
-    0x84c: 68,
-    0x84d: 68,
-    0x84e: 68,
-    0x84f: 68,
-    0x850: 68,
-    0x851: 68,
-    0x852: 68,
-    0x853: 68,
-    0x854: 82,
-    0x855: 68,
-    0x856: 85,
-    0x857: 85,
-    0x858: 85,
-    0x860: 68,
-    0x861: 85,
-    0x862: 68,
-    0x863: 68,
-    0x864: 68,
-    0x865: 68,
-    0x866: 85,
-    0x867: 82,
-    0x868: 68,
-    0x869: 82,
-    0x86a: 82,
-    0x8a0: 68,
-    0x8a1: 68,
-    0x8a2: 68,
-    0x8a3: 68,
-    0x8a4: 68,
-    0x8a5: 68,
-    0x8a6: 68,
-    0x8a7: 68,
-    0x8a8: 68,
-    0x8a9: 68,
-    0x8aa: 82,
-    0x8ab: 82,
-    0x8ac: 82,
-    0x8ad: 85,
-    0x8ae: 82,
-    0x8af: 68,
-    0x8b0: 68,
-    0x8b1: 82,
-    0x8b2: 82,
-    0x8b3: 68,
-    0x8b4: 68,
-    0x8b6: 68,
-    0x8b7: 68,
-    0x8b8: 68,
-    0x8b9: 82,
-    0x8ba: 68,
-    0x8bb: 68,
-    0x8bc: 68,
-    0x8bd: 68,
-    0x8e2: 85,
-    0x1806: 85,
-    0x1807: 68,
-    0x180a: 67,
-    0x180e: 85,
-    0x1820: 68,
-    0x1821: 68,
-    0x1822: 68,
-    0x1823: 68,
-    0x1824: 68,
-    0x1825: 68,
-    0x1826: 68,
-    0x1827: 68,
-    0x1828: 68,
-    0x1829: 68,
-    0x182a: 68,
-    0x182b: 68,
-    0x182c: 68,
-    0x182d: 68,
-    0x182e: 68,
-    0x182f: 68,
-    0x1830: 68,
-    0x1831: 68,
-    0x1832: 68,
-    0x1833: 68,
-    0x1834: 68,
-    0x1835: 68,
-    0x1836: 68,
-    0x1837: 68,
-    0x1838: 68,
-    0x1839: 68,
-    0x183a: 68,
-    0x183b: 68,
-    0x183c: 68,
-    0x183d: 68,
-    0x183e: 68,
-    0x183f: 68,
-    0x1840: 68,
-    0x1841: 68,
-    0x1842: 68,
-    0x1843: 68,
-    0x1844: 68,
-    0x1845: 68,
-    0x1846: 68,
-    0x1847: 68,
-    0x1848: 68,
-    0x1849: 68,
-    0x184a: 68,
-    0x184b: 68,
-    0x184c: 68,
-    0x184d: 68,
-    0x184e: 68,
-    0x184f: 68,
-    0x1850: 68,
-    0x1851: 68,
-    0x1852: 68,
-    0x1853: 68,
-    0x1854: 68,
-    0x1855: 68,
-    0x1856: 68,
-    0x1857: 68,
-    0x1858: 68,
-    0x1859: 68,
-    0x185a: 68,
-    0x185b: 68,
-    0x185c: 68,
-    0x185d: 68,
-    0x185e: 68,
-    0x185f: 68,
-    0x1860: 68,
-    0x1861: 68,
-    0x1862: 68,
-    0x1863: 68,
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diff --git a/venv/lib/python3.7/site-packages/idna/intranges.py b/venv/lib/python3.7/site-packages/idna/intranges.py
deleted file mode 100644
index fa8a735..0000000
--- a/venv/lib/python3.7/site-packages/idna/intranges.py
+++ /dev/null
@@ -1,53 +0,0 @@
-"""
-Given a list of integers, made up of (hopefully) a small number of long runs
-of consecutive integers, compute a representation of the form
-((start1, end1), (start2, end2) ...). Then answer the question "was x present
-in the original list?" in time O(log(# runs)).
-"""
-
-import bisect
-
-def intranges_from_list(list_):
-    """Represent a list of integers as a sequence of ranges:
-    ((start_0, end_0), (start_1, end_1), ...), such that the original
-    integers are exactly those x such that start_i <= x < end_i for some i.
-
-    Ranges are encoded as single integers (start << 32 | end), not as tuples.
-    """
-
-    sorted_list = sorted(list_)
-    ranges = []
-    last_write = -1
-    for i in range(len(sorted_list)):
-        if i+1 < len(sorted_list):
-            if sorted_list[i] == sorted_list[i+1]-1:
-                continue
-        current_range = sorted_list[last_write+1:i+1]
-        ranges.append(_encode_range(current_range[0], current_range[-1] + 1))
-        last_write = i
-
-    return tuple(ranges)
-
-def _encode_range(start, end):
-    return (start << 32) | end
-
-def _decode_range(r):
-    return (r >> 32), (r & ((1 << 32) - 1))
-
-
-def intranges_contain(int_, ranges):
-    """Determine if `int_` falls into one of the ranges in `ranges`."""
-    tuple_ = _encode_range(int_, 0)
-    pos = bisect.bisect_left(ranges, tuple_)
-    # we could be immediately ahead of a tuple (start, end)
-    # with start < int_ <= end
-    if pos > 0:
-        left, right = _decode_range(ranges[pos-1])
-        if left <= int_ < right:
-            return True
-    # or we could be immediately behind a tuple (int_, end)
-    if pos < len(ranges):
-        left, _ = _decode_range(ranges[pos])
-        if left == int_:
-            return True
-    return False
diff --git a/venv/lib/python3.7/site-packages/idna/package_data.py b/venv/lib/python3.7/site-packages/idna/package_data.py
deleted file mode 100644
index 257e898..0000000
--- a/venv/lib/python3.7/site-packages/idna/package_data.py
+++ /dev/null
@@ -1,2 +0,0 @@
-__version__ = '2.8'
-
diff --git a/venv/lib/python3.7/site-packages/idna/uts46data.py b/venv/lib/python3.7/site-packages/idna/uts46data.py
deleted file mode 100644
index a68ed4c..0000000
--- a/venv/lib/python3.7/site-packages/idna/uts46data.py
+++ /dev/null
@@ -1,8205 +0,0 @@
-# This file is automatically generated by tools/idna-data
-# vim: set fileencoding=utf-8 :
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-    (0x2F9E4, 'M', u'鄑'),
-    (0x2F9E5, 'M', u'𨜮'),
-    (0x2F9E6, 'M', u'鄛'),
-    (0x2F9E7, 'M', u'鈸'),
-    (0x2F9E8, 'M', u'鋗'),
-    (0x2F9E9, 'M', u'鋘'),
-    (0x2F9EA, 'M', u'鉼'),
-    (0x2F9EB, 'M', u'鏹'),
-    (0x2F9EC, 'M', u'鐕'),
-    (0x2F9ED, 'M', u'𨯺'),
-    (0x2F9EE, 'M', u'開'),
-    (0x2F9EF, 'M', u'䦕'),
-    (0x2F9F0, 'M', u'閷'),
-    (0x2F9F1, 'M', u'𨵷'),
-    (0x2F9F2, 'M', u'䧦'),
-    (0x2F9F3, 'M', u'雃'),
-    (0x2F9F4, 'M', u'嶲'),
-    (0x2F9F5, 'M', u'霣'),
-    (0x2F9F6, 'M', u'𩅅'),
-    (0x2F9F7, 'M', u'𩈚'),
-    (0x2F9F8, 'M', u'䩮'),
-    (0x2F9F9, 'M', u'䩶'),
-    (0x2F9FA, 'M', u'韠'),
-    (0x2F9FB, 'M', u'𩐊'),
-    (0x2F9FC, 'M', u'䪲'),
-    (0x2F9FD, 'M', u'𩒖'),
-    (0x2F9FE, 'M', u'頋'),
-    (0x2FA00, 'M', u'頩'),
-    (0x2FA01, 'M', u'𩖶'),
-    (0x2FA02, 'M', u'飢'),
-    (0x2FA03, 'M', u'䬳'),
-    (0x2FA04, 'M', u'餩'),
-    (0x2FA05, 'M', u'馧'),
-    (0x2FA06, 'M', u'駂'),
-    (0x2FA07, 'M', u'駾'),
-    (0x2FA08, 'M', u'䯎'),
-    (0x2FA09, 'M', u'𩬰'),
-    (0x2FA0A, 'M', u'鬒'),
-    (0x2FA0B, 'M', u'鱀'),
-    (0x2FA0C, 'M', u'鳽'),
-    (0x2FA0D, 'M', u'䳎'),
-    (0x2FA0E, 'M', u'䳭'),
-    (0x2FA0F, 'M', u'鵧'),
-    (0x2FA10, 'M', u'𪃎'),
-    (0x2FA11, 'M', u'䳸'),
-    (0x2FA12, 'M', u'𪄅'),
-    (0x2FA13, 'M', u'𪈎'),
-    (0x2FA14, 'M', u'𪊑'),
-    (0x2FA15, 'M', u'麻'),
-    (0x2FA16, 'M', u'䵖'),
-    (0x2FA17, 'M', u'黹'),
-    (0x2FA18, 'M', u'黾'),
-    (0x2FA19, 'M', u'鼅'),
-    (0x2FA1A, 'M', u'鼏'),
-    (0x2FA1B, 'M', u'鼖'),
-    (0x2FA1C, 'M', u'鼻'),
-    (0x2FA1D, 'M', u'𪘀'),
-    (0x2FA1E, 'X'),
-    (0xE0100, 'I'),
-    ]
-
-def _seg_78():
-    return [
-    (0xE01F0, 'X'),
-    ]
-
-uts46data = tuple(
-    _seg_0()
-    + _seg_1()
-    + _seg_2()
-    + _seg_3()
-    + _seg_4()
-    + _seg_5()
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diff --git a/venv/lib/python3.7/site-packages/mopidy/__init__.py b/venv/lib/python3.7/site-packages/mopidy/__init__.py
deleted file mode 100644
index ccb8082..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/__init__.py
+++ /dev/null
@@ -1,15 +0,0 @@
-import platform
-import sys
-import warnings
-
-import pkg_resources
-
-if not sys.version_info >= (3, 7):
-    sys.exit(
-        f"ERROR: Mopidy requires Python >= 3.7, "
-        f"but found {platform.python_version()}."
-    )
-
-warnings.filterwarnings("ignore", "could not open display")
-
-__version__ = pkg_resources.get_distribution("Mopidy").version
diff --git a/venv/lib/python3.7/site-packages/mopidy/__main__.py b/venv/lib/python3.7/site-packages/mopidy/__main__.py
deleted file mode 100644
index 6ef2d2b..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/__main__.py
+++ /dev/null
@@ -1,231 +0,0 @@
-import logging
-import signal
-import sys
-
-import pykka.debug
-
-from mopidy import commands
-from mopidy import config as config_lib
-from mopidy import ext
-from mopidy.internal import log, path, process, versioning
-from mopidy.internal.gi import Gst  # noqa: F401
-
-try:
-    # Make GLib's mainloop the event loop for python-dbus
-    import dbus.mainloop.glib
-
-    dbus.mainloop.glib.threads_init()
-    dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
-except ImportError:
-    pass
-
-
-logger = logging.getLogger(__name__)
-
-
-def main():
-    log.bootstrap_delayed_logging()
-    logger.info(f"Starting Mopidy {versioning.get_version()}")
-
-    signal.signal(signal.SIGTERM, process.sigterm_handler)
-    # Windows does not have signal.SIGUSR1
-    if hasattr(signal, "SIGUSR1"):
-        signal.signal(signal.SIGUSR1, pykka.debug.log_thread_tracebacks)
-
-    try:
-        registry = ext.Registry()
-
-        root_cmd = commands.RootCommand()
-        config_cmd = commands.ConfigCommand()
-        deps_cmd = commands.DepsCommand()
-
-        root_cmd.set(extension=None, registry=registry)
-        root_cmd.add_child("config", config_cmd)
-        root_cmd.add_child("deps", deps_cmd)
-
-        extensions_data = ext.load_extensions()
-
-        for data in extensions_data:
-            if data.command:  # TODO: check isinstance?
-                data.command.set(extension=data.extension)
-                root_cmd.add_child(data.extension.ext_name, data.command)
-
-        args = root_cmd.parse(sys.argv[1:])
-
-        config, config_errors = config_lib.load(
-            args.config_files,
-            [d.config_schema for d in extensions_data],
-            [d.config_defaults for d in extensions_data],
-            args.config_overrides,
-        )
-
-        create_core_dirs(config)
-        create_initial_config_file(args, extensions_data)
-
-        log.setup_logging(
-            config, args.base_verbosity_level, args.verbosity_level
-        )
-
-        extensions = {
-            "validate": [],
-            "config": [],
-            "disabled": [],
-            "enabled": [],
-        }
-        for data in extensions_data:
-            extension = data.extension
-
-            # TODO: factor out all of this to a helper that can be tested
-            if not ext.validate_extension_data(data):
-                config[extension.ext_name] = {"enabled": False}
-                config_errors[extension.ext_name] = {
-                    "enabled": "extension disabled by self check."
-                }
-                extensions["validate"].append(extension)
-            elif not config[extension.ext_name]["enabled"]:
-                config[extension.ext_name] = {"enabled": False}
-                config_errors[extension.ext_name] = {
-                    "enabled": "extension disabled by user config."
-                }
-                extensions["disabled"].append(extension)
-            elif config_errors.get(extension.ext_name):
-                config[extension.ext_name]["enabled"] = False
-                config_errors[extension.ext_name][
-                    "enabled"
-                ] = "extension disabled due to config errors."
-                extensions["config"].append(extension)
-            else:
-                extensions["enabled"].append(extension)
-
-        log_extension_info(
-            [d.extension for d in extensions_data], extensions["enabled"]
-        )
-
-        # Config and deps commands are simply special cased for now.
-        if args.command == config_cmd:
-            schemas = [d.config_schema for d in extensions_data]
-            return args.command.run(config, config_errors, schemas)
-        elif args.command == deps_cmd:
-            return args.command.run()
-
-        check_config_errors(config, config_errors, extensions)
-
-        if not extensions["enabled"]:
-            logger.error("No extension enabled, exiting...")
-            sys.exit(1)
-
-        # Read-only config from here on, please.
-        proxied_config = config_lib.Proxy(config)
-
-        if args.extension and args.extension not in extensions["enabled"]:
-            logger.error(
-                "Unable to run command provided by disabled extension %s",
-                args.extension.ext_name,
-            )
-            return 1
-
-        for extension in extensions["enabled"]:
-            try:
-                extension.setup(registry)
-            except Exception:
-                # TODO: would be nice a transactional registry. But sadly this
-                # is a bit tricky since our current API is giving out a mutable
-                # list. We might however be able to replace this with a
-                # collections.Sequence to provide a RO view.
-                logger.exception(
-                    f"Extension {extension.ext_name} failed during setup. "
-                    f"This might have left the registry in a bad state."
-                )
-
-        # Anything that wants to exit after this point must use
-        # mopidy.internal.process.exit_process as actors can have been started.
-        try:
-            return args.command.run(args, proxied_config)
-        except NotImplementedError:
-            print(root_cmd.format_help())
-            return 1
-
-    except KeyboardInterrupt:
-        pass
-    except Exception as ex:
-        logger.exception(ex)
-        raise
-
-
-def create_core_dirs(config):
-    path.get_or_create_dir(config["core"]["cache_dir"])
-    path.get_or_create_dir(config["core"]["config_dir"])
-    path.get_or_create_dir(config["core"]["data_dir"])
-
-
-def create_initial_config_file(args, extensions_data):
-    """Initialize whatever the last config file is with defaults"""
-
-    config_file = path.expand_path(args.config_files[-1])
-
-    if config_file.exists():
-        return
-
-    try:
-        default = config_lib.format_initial(extensions_data)
-        path.get_or_create_file(
-            config_file,
-            mkdir=False,
-            content=default.encode(errors="surrogateescape"),
-        )
-        logger.info(f"Initialized {config_file.as_uri()} with default config")
-    except OSError as exc:
-        logger.warning(
-            f"Unable to initialize {config_file.as_uri()} with default config: {exc}"
-        )
-
-
-def log_extension_info(all_extensions, enabled_extensions):
-    # TODO: distinguish disabled vs blocked by env?
-    enabled_names = {e.ext_name for e in enabled_extensions}
-    disabled_names = {e.ext_name for e in all_extensions} - enabled_names
-    logger.info("Enabled extensions: %s", ", ".join(enabled_names) or "none")
-    logger.info("Disabled extensions: %s", ", ".join(disabled_names) or "none")
-
-
-def check_config_errors(config, errors, extensions):
-    fatal_errors = []
-    extension_names = {}
-    all_extension_names = set()
-
-    for state in extensions:
-        extension_names[state] = {e.ext_name for e in extensions[state]}
-        all_extension_names.update(extension_names[state])
-
-    for section in sorted(errors):
-        if not errors[section]:
-            continue
-
-        if section not in all_extension_names:
-            logger.warning(f"Found fatal {section} configuration errors:")
-            fatal_errors.append(section)
-        elif section in extension_names["config"]:
-            del errors[section]["enabled"]
-            logger.warning(
-                f"Found {section} configuration errors. "
-                f"The extension has been automatically disabled:"
-            )
-        else:
-            continue
-
-        for field, msg in errors[section].items():
-            logger.warning(f"  {section}/{field} {msg}")
-
-    if extensions["config"]:
-        logger.warning(
-            "Please fix the extension configuration errors or "
-            "disable the extensions to silence these messages."
-        )
-
-    if fatal_errors:
-        logger.error("Please fix fatal configuration errors, exiting...")
-        sys.exit(1)
-
-
-if __name__ == "__main__":
-    sys.exit(main())
diff --git a/venv/lib/python3.7/site-packages/mopidy/audio/__init__.py b/venv/lib/python3.7/site-packages/mopidy/audio/__init__.py
deleted file mode 100644
index 8858a0b..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/audio/__init__.py
+++ /dev/null
@@ -1,10 +0,0 @@
-# flake8: noqa
-from .actor import Audio
-from .constants import PlaybackState
-from .listener import AudioListener
-from .utils import (
-    calculate_duration,
-    create_buffer,
-    millisecond_to_clocktime,
-    supported_uri_schemes,
-)
diff --git a/venv/lib/python3.7/site-packages/mopidy/audio/actor.py b/venv/lib/python3.7/site-packages/mopidy/audio/actor.py
deleted file mode 100644
index e4c4d4a..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/audio/actor.py
+++ /dev/null
@@ -1,855 +0,0 @@
-import logging
-import os
-import threading
-
-import pykka
-
-from mopidy import exceptions
-from mopidy.audio import tags as tags_lib
-from mopidy.audio import utils
-from mopidy.audio.constants import PlaybackState
-from mopidy.audio.listener import AudioListener
-from mopidy.internal import process
-from mopidy.internal.gi import GLib, GObject, Gst, GstPbutils
-
-logger = logging.getLogger(__name__)
-
-# This logger is only meant for debug logging of low level GStreamer info such
-# as callbacks, event, messages and direct interaction with GStreamer such as
-# set_state() on a pipeline.
-gst_logger = logging.getLogger("mopidy.audio.gst")
-
-_GST_PLAY_FLAGS_AUDIO = 0x02
-
-_GST_STATE_MAPPING = {
-    Gst.State.PLAYING: PlaybackState.PLAYING,
-    Gst.State.PAUSED: PlaybackState.PAUSED,
-    Gst.State.NULL: PlaybackState.STOPPED,
-}
-
-
-# TODO: expose this as a property on audio?
-class _Appsrc:
-
-    """Helper class for dealing with appsrc based playback."""
-
-    def __init__(self):
-        self._signals = utils.Signals()
-        self.reset()
-
-    def reset(self):
-        """Reset the helper.
-
-        Should be called whenever the source changes and we are not setting up
-        a new appsrc.
-        """
-        self.prepare(None, None, None, None)
-
-    def prepare(self, caps, need_data, enough_data, seek_data):
-        """Store info we will need when the appsrc element gets installed."""
-        self._signals.clear()
-        self._source = None
-        self._caps = caps
-        self._need_data_callback = need_data
-        self._seek_data_callback = seek_data
-        self._enough_data_callback = enough_data
-
-    def configure(self, source):
-        """Configure the supplied source for use.
-
-        Should be called whenever we get a new appsrc.
-        """
-        source.set_property("caps", self._caps)
-        source.set_property("format", "time")
-        source.set_property("stream-type", "seekable")
-        source.set_property("max-bytes", 1 << 20)  # 1MB
-        source.set_property("min-percent", 50)
-
-        if self._need_data_callback:
-            self._signals.connect(
-                source, "need-data", self._on_signal, self._need_data_callback
-            )
-        if self._seek_data_callback:
-            self._signals.connect(
-                source, "seek-data", self._on_signal, self._seek_data_callback
-            )
-        if self._enough_data_callback:
-            self._signals.connect(
-                source,
-                "enough-data",
-                self._on_signal,
-                None,
-                self._enough_data_callback,
-            )
-
-        self._source = source
-
-    def push(self, buffer_):
-        if self._source is None:
-            return False
-
-        if buffer_ is None:
-            gst_logger.debug("Sending appsrc end-of-stream event.")
-            result = self._source.emit("end-of-stream")
-            return result == Gst.FlowReturn.OK
-        else:
-            result = self._source.emit("push-buffer", buffer_)
-            return result == Gst.FlowReturn.OK
-
-    def _on_signal(self, element, clocktime, func):
-        # This shim is used to ensure we always return true, and also handles
-        # that not all the callbacks have a time argument.
-        if clocktime is None:
-            func()
-        else:
-            func(utils.clocktime_to_millisecond(clocktime))
-        return True
-
-
-# TODO: expose this as a property on audio when #790 gets further along.
-class _Outputs(Gst.Bin):
-    def __init__(self):
-        Gst.Bin.__init__(self)
-        # TODO gst1: Set 'outputs' as the Bin name for easier debugging
-
-        self._tee = Gst.ElementFactory.make("tee")
-        self.add(self._tee)
-
-        ghost_pad = Gst.GhostPad.new("sink", self._tee.get_static_pad("sink"))
-        self.add_pad(ghost_pad)
-
-    def add_output(self, description):
-        # XXX This only works for pipelines not in use until #790 gets done.
-        try:
-            output = Gst.parse_bin_from_description(
-                description, ghost_unlinked_pads=True
-            )
-        except GLib.GError as ex:
-            logger.error(
-                'Failed to create audio output "%s": %s', description, ex
-            )
-            raise exceptions.AudioException(bytes(ex))
-
-        self._add(output)
-        logger.info('Audio output set to "%s"', description)
-
-    def _add(self, element):
-        queue = Gst.ElementFactory.make("queue")
-        self.add(element)
-        self.add(queue)
-        queue.link(element)
-        self._tee.link(queue)
-
-
-class SoftwareMixer:
-    def __init__(self, mixer):
-        self._mixer = mixer
-        self._element = None
-        self._last_volume = None
-        self._last_mute = None
-        self._signals = utils.Signals()
-
-    def setup(self, element, mixer_ref):
-        self._element = element
-        self._mixer.setup(mixer_ref)
-
-    def teardown(self):
-        self._signals.clear()
-        self._mixer.teardown()
-
-    def get_volume(self):
-        return int(round(self._element.get_property("volume") * 100))
-
-    def set_volume(self, volume):
-        self._element.set_property("volume", volume / 100.0)
-        self._mixer.trigger_volume_changed(self.get_volume())
-
-    def get_mute(self):
-        return self._element.get_property("mute")
-
-    def set_mute(self, mute):
-        self._element.set_property("mute", bool(mute))
-        self._mixer.trigger_mute_changed(self.get_mute())
-
-
-class _Handler:
-    def __init__(self, audio):
-        self._audio = audio
-        self._element = None
-        self._pad = None
-        self._message_handler_id = None
-        self._event_handler_id = None
-
-    def setup_message_handling(self, element):
-        self._element = element
-        bus = element.get_bus()
-        bus.add_signal_watch()
-        self._message_handler_id = bus.connect("message", self.on_message)
-
-    def setup_event_handling(self, pad):
-        self._pad = pad
-        self._event_handler_id = pad.add_probe(
-            Gst.PadProbeType.EVENT_BOTH, self.on_pad_event
-        )
-
-    def teardown_message_handling(self):
-        bus = self._element.get_bus()
-        bus.remove_signal_watch()
-        bus.disconnect(self._message_handler_id)
-        self._message_handler_id = None
-
-    def teardown_event_handling(self):
-        self._pad.remove_probe(self._event_handler_id)
-        self._event_handler_id = None
-
-    def on_message(self, bus, msg):
-        if msg.type == Gst.MessageType.STATE_CHANGED:
-            if msg.src != self._element:
-                return
-            old_state, new_state, pending_state = msg.parse_state_changed()
-            self.on_playbin_state_changed(old_state, new_state, pending_state)
-        elif msg.type == Gst.MessageType.BUFFERING:
-            self.on_buffering(msg.parse_buffering(), msg.get_structure())
-        elif msg.type == Gst.MessageType.EOS:
-            self.on_end_of_stream()
-        elif msg.type == Gst.MessageType.ERROR:
-            error, debug = msg.parse_error()
-            self.on_error(error, debug)
-        elif msg.type == Gst.MessageType.WARNING:
-            error, debug = msg.parse_warning()
-            self.on_warning(error, debug)
-        elif msg.type == Gst.MessageType.ASYNC_DONE:
-            self.on_async_done()
-        elif msg.type == Gst.MessageType.TAG:
-            taglist = msg.parse_tag()
-            self.on_tag(taglist)
-        elif msg.type == Gst.MessageType.ELEMENT:
-            if GstPbutils.is_missing_plugin_message(msg):
-                self.on_missing_plugin(msg)
-        elif msg.type == Gst.MessageType.STREAM_START:
-            self.on_stream_start()
-
-    def on_pad_event(self, pad, pad_probe_info):
-        event = pad_probe_info.get_event()
-        if event.type == Gst.EventType.SEGMENT:
-            self.on_segment(event.parse_segment())
-        return Gst.PadProbeReturn.OK
-
-    def on_playbin_state_changed(self, old_state, new_state, pending_state):
-        gst_logger.debug(
-            "Got STATE_CHANGED bus message: old=%s new=%s pending=%s",
-            old_state.value_name,
-            new_state.value_name,
-            pending_state.value_name,
-        )
-
-        if new_state == Gst.State.READY and pending_state == Gst.State.NULL:
-            # XXX: We're not called on the last state change when going down to
-            # NULL, so we rewrite the second to last call to get the expected
-            # behavior.
-            new_state = Gst.State.NULL
-            pending_state = Gst.State.VOID_PENDING
-
-        if pending_state != Gst.State.VOID_PENDING:
-            return  # Ignore intermediate state changes
-
-        if new_state == Gst.State.READY:
-            return  # Ignore READY state as it's GStreamer specific
-
-        new_state = _GST_STATE_MAPPING[new_state]
-        old_state, self._audio.state = self._audio.state, new_state
-
-        target_state = _GST_STATE_MAPPING.get(self._audio._target_state)
-        if target_state is None:
-            # XXX: Workaround for #1430, to be fixed properly by #1222.
-            logger.warn("Race condition happened. See #1222 and #1430.")
-            return
-        if target_state == new_state:
-            target_state = None
-
-        logger.debug(
-            "Audio event: state_changed(old_state=%s, new_state=%s, "
-            "target_state=%s)",
-            old_state,
-            new_state,
-            target_state,
-        )
-        AudioListener.send(
-            "state_changed",
-            old_state=old_state,
-            new_state=new_state,
-            target_state=target_state,
-        )
-        if new_state == PlaybackState.STOPPED:
-            logger.debug("Audio event: stream_changed(uri=None)")
-            AudioListener.send("stream_changed", uri=None)
-
-        if "GST_DEBUG_DUMP_DOT_DIR" in os.environ:
-            Gst.debug_bin_to_dot_file(
-                self._audio._playbin, Gst.DebugGraphDetails.ALL, "mopidy"
-            )
-
-    def on_buffering(self, percent, structure=None):
-        if self._audio._target_state < Gst.State.PAUSED:
-            gst_logger.debug("Skip buffering during track change.")
-            return
-
-        if structure is not None and structure.has_field("buffering-mode"):
-            buffering_mode = structure.get_enum(
-                "buffering-mode", Gst.BufferingMode
-            )
-            if buffering_mode == Gst.BufferingMode.LIVE:
-                return  # Live sources stall in paused.
-
-        level = logging.getLevelName("TRACE")
-        if percent < 10 and not self._audio._buffering:
-            self._audio._playbin.set_state(Gst.State.PAUSED)
-            self._audio._buffering = True
-            level = logging.DEBUG
-        if percent == 100:
-            self._audio._buffering = False
-            if self._audio._target_state == Gst.State.PLAYING:
-                self._audio._playbin.set_state(Gst.State.PLAYING)
-            level = logging.DEBUG
-
-        gst_logger.log(
-            level, "Got BUFFERING bus message: percent=%d%%", percent
-        )
-
-    def on_end_of_stream(self):
-        gst_logger.debug("Got EOS (end of stream) bus message.")
-        logger.debug("Audio event: reached_end_of_stream()")
-        self._audio._tags = {}
-        AudioListener.send("reached_end_of_stream")
-
-    def on_error(self, error, debug):
-        gst_logger.error(f"GStreamer error: {error.message}")
-        gst_logger.debug(
-            f"Got ERROR bus message: error={error!r} debug={debug!r}"
-        )
-
-        # TODO: is this needed?
-        self._audio.stop_playback()
-
-    def on_warning(self, error, debug):
-        gst_logger.warning(f"GStreamer warning: {error.message}")
-        gst_logger.debug(
-            f"Got WARNING bus message: error={error!r} debug={debug!r}"
-        )
-
-    def on_async_done(self):
-        gst_logger.debug("Got ASYNC_DONE bus message.")
-
-    def on_tag(self, taglist):
-        tags = tags_lib.convert_taglist(taglist)
-        gst_logger.debug("Got TAG bus message: tags=%r", dict(tags))
-
-        # Postpone emitting tags until stream start.
-        if self._audio._pending_tags is not None:
-            self._audio._pending_tags.update(tags)
-            return
-
-        # TODO: Add proper tests for only emitting changed tags.
-        unique = object()
-        changed = []
-        for key, value in tags.items():
-            # Update any tags that changed, and store changed keys.
-            if self._audio._tags.get(key, unique) != value:
-                self._audio._tags[key] = value
-                changed.append(key)
-
-        if changed:
-            logger.debug("Audio event: tags_changed(tags=%r)", changed)
-            AudioListener.send("tags_changed", tags=changed)
-
-    def on_missing_plugin(self, msg):
-        desc = GstPbutils.missing_plugin_message_get_description(msg)
-        debug = GstPbutils.missing_plugin_message_get_installer_detail(msg)
-        gst_logger.debug("Got missing-plugin bus message: description=%r", desc)
-        logger.warning("Could not find a %s to handle media.", desc)
-        if GstPbutils.install_plugins_supported():
-            logger.info(
-                "You might be able to fix this by running: "
-                'gst-installer "%s"',
-                debug,
-            )
-        # TODO: store the missing plugins installer info in a file so we can
-        # can provide a 'mopidy install-missing-plugins' if the system has the
-        # required helper installed?
-
-    def on_stream_start(self):
-        gst_logger.debug("Got STREAM_START bus message")
-        uri = self._audio._pending_uri
-        logger.debug("Audio event: stream_changed(uri=%r)", uri)
-        AudioListener.send("stream_changed", uri=uri)
-
-        # Emit any postponed tags that we got after about-to-finish.
-        tags, self._audio._pending_tags = self._audio._pending_tags, None
-        self._audio._tags = tags or {}
-
-        if tags:
-            logger.debug("Audio event: tags_changed(tags=%r)", tags.keys())
-            AudioListener.send("tags_changed", tags=tags.keys())
-
-        if self._audio._pending_metadata:
-            self._audio._playbin.send_event(self._audio._pending_metadata)
-            self._audio._pending_metadata = None
-
-    def on_segment(self, segment):
-        gst_logger.debug(
-            "Got SEGMENT pad event: "
-            "rate=%(rate)s format=%(format)s start=%(start)s stop=%(stop)s "
-            "position=%(position)s",
-            {
-                "rate": segment.rate,
-                "format": Gst.Format.get_name(segment.format),
-                "start": segment.start,
-                "stop": segment.stop,
-                "position": segment.position,
-            },
-        )
-        position_ms = segment.position // Gst.MSECOND
-        logger.debug("Audio event: position_changed(position=%r)", position_ms)
-        AudioListener.send("position_changed", position=position_ms)
-
-
-# TODO: create a player class which replaces the actors internals
-class Audio(pykka.ThreadingActor):
-
-    """
-    Audio output through `GStreamer <https://gstreamer.freedesktop.org/>`_.
-    """
-
-    #: The GStreamer state mapped to :class:`mopidy.audio.PlaybackState`
-    state = PlaybackState.STOPPED
-
-    #: The software mixing interface :class:`mopidy.audio.actor.SoftwareMixer`
-    mixer = None
-
-    def __init__(self, config, mixer):
-        super().__init__()
-
-        self._config = config
-        self._target_state = Gst.State.NULL
-        self._buffering = False
-        self._live_stream = False
-        self._tags = {}
-        self._pending_uri = None
-        self._pending_tags = None
-        self._pending_metadata = None
-
-        self._playbin = None
-        self._outputs = None
-        self._queue = None
-        self._about_to_finish_callback = None
-
-        self._handler = _Handler(self)
-        self._appsrc = _Appsrc()
-        self._signals = utils.Signals()
-
-        if mixer and self._config["audio"]["mixer"] == "software":
-            self.mixer = pykka.traversable(SoftwareMixer(mixer))
-
-    def on_start(self):
-        self._thread = threading.current_thread()
-        try:
-            self._setup_preferences()
-            self._setup_playbin()
-            self._setup_outputs()
-            self._setup_audio_sink()
-        except GLib.GError as ex:
-            logger.exception(ex)
-            process.exit_process()
-
-    def on_stop(self):
-        self._teardown_mixer()
-        self._teardown_playbin()
-
-    def _setup_preferences(self):
-        # TODO: move out of audio actor?
-        # Fix for https://github.com/mopidy/mopidy/issues/604
-        registry = Gst.Registry.get()
-        jacksink = registry.find_feature("jackaudiosink", Gst.ElementFactory)
-        if jacksink:
-            jacksink.set_rank(Gst.Rank.SECONDARY)
-
-    def _setup_playbin(self):
-        playbin = Gst.ElementFactory.make("playbin")
-        playbin.set_property("flags", _GST_PLAY_FLAGS_AUDIO)
-
-        # TODO: turn into config values...
-        playbin.set_property("buffer-size", 5 << 20)  # 5MB
-        playbin.set_property("buffer-duration", 5 * Gst.SECOND)
-
-        self._signals.connect(playbin, "source-setup", self._on_source_setup)
-        self._signals.connect(
-            playbin, "about-to-finish", self._on_about_to_finish
-        )
-
-        self._playbin = playbin
-        self._handler.setup_message_handling(playbin)
-
-    def _teardown_playbin(self):
-        self._handler.teardown_message_handling()
-        self._handler.teardown_event_handling()
-        self._signals.disconnect(self._playbin, "about-to-finish")
-        self._signals.disconnect(self._playbin, "source-setup")
-        self._playbin.set_state(Gst.State.NULL)
-
-    def _setup_outputs(self):
-        # We don't want to use outputs for regular testing, so just install
-        # an unsynced fakesink when someone asks for a 'testoutput'.
-        if self._config["audio"]["output"] == "testoutput":
-            self._outputs = Gst.ElementFactory.make("fakesink")
-        else:
-            self._outputs = _Outputs()
-            try:
-                self._outputs.add_output(self._config["audio"]["output"])
-            except exceptions.AudioException:
-                process.exit_process()  # TODO: move this up the chain
-
-        self._handler.setup_event_handling(self._outputs.get_static_pad("sink"))
-
-    def _setup_audio_sink(self):
-        audio_sink = Gst.ElementFactory.make("bin", "audio-sink")
-        queue = Gst.ElementFactory.make("queue")
-        volume = Gst.ElementFactory.make("volume")
-
-        # Queue element to buy us time between the about-to-finish event and
-        # the actual switch, i.e. about to switch can block for longer thanks
-        # to this queue.
-
-        # TODO: See if settings should be set to minimize latency. Previous
-        # setting breaks appsrc, and settings before that broke on a few
-        # systems. So leave the default to play it safe.
-        buffer_time = self._config["audio"]["buffer_time"]
-        if buffer_time is not None and buffer_time > 0:
-            queue.set_property("max-size-time", buffer_time * Gst.MSECOND)
-
-        audio_sink.add(queue)
-        audio_sink.add(self._outputs)
-        audio_sink.add(volume)
-
-        queue.link(volume)
-        volume.link(self._outputs)
-
-        if self.mixer:
-            self.mixer.setup(volume, self.actor_ref.proxy().mixer)
-
-        ghost_pad = Gst.GhostPad.new("sink", queue.get_static_pad("sink"))
-        audio_sink.add_pad(ghost_pad)
-
-        self._playbin.set_property("audio-sink", audio_sink)
-        self._queue = queue
-
-    def _teardown_mixer(self):
-        if self.mixer:
-            self.mixer.teardown()
-
-    def _on_about_to_finish(self, element):
-        if self._thread == threading.current_thread():
-            logger.error(
-                "about-to-finish in actor, aborting to avoid deadlock."
-            )
-            return
-
-        gst_logger.debug("Got about-to-finish event.")
-        if self._about_to_finish_callback:
-            logger.debug("Running about-to-finish callback.")
-            self._about_to_finish_callback()
-
-    def _on_source_setup(self, element, source):
-        gst_logger.debug(
-            "Got source-setup signal: element=%s", source.__class__.__name__
-        )
-
-        if source.get_factory().get_name() == "appsrc":
-            self._appsrc.configure(source)
-        else:
-            self._appsrc.reset()
-
-        if self._live_stream and hasattr(source.props, "is_live"):
-            gst_logger.debug("Enabling live stream mode")
-            source.set_live(True)
-
-        utils.setup_proxy(source, self._config["proxy"])
-
-    def set_uri(self, uri, live_stream=False):
-        """
-        Set URI of audio to be played.
-
-        You *MUST* call :meth:`prepare_change` before calling this method.
-
-        :param uri: the URI to play
-        :type uri: string
-        :param live_stream: disables buffering, reducing latency for stream,
-            and discarding data when paused
-        :type live_stream: bool
-        """
-
-        # XXX: Hack to workaround issue on Mac OS X where volume level
-        # does not persist between track changes. mopidy/mopidy#886
-        if self.mixer is not None:
-            current_volume = self.mixer.get_volume()
-        else:
-            current_volume = None
-
-        self._pending_uri = uri
-        self._pending_tags = {}
-        self._live_stream = live_stream
-        self._playbin.set_property("uri", uri)
-
-        if self.mixer is not None and current_volume is not None:
-            self.mixer.set_volume(current_volume)
-
-    def set_appsrc(
-        self, caps, need_data=None, enough_data=None, seek_data=None
-    ):
-        """
-        Switch to using appsrc for getting audio to be played.
-
-        You *MUST* call :meth:`prepare_change` before calling this method.
-
-        :param caps: GStreamer caps string describing the audio format to
-            expect
-        :type caps: string
-        :param need_data: callback for when appsrc needs data
-        :type need_data: callable which takes data length hint in ms
-        :param enough_data: callback for when appsrc has enough data
-        :type enough_data: callable
-        :param seek_data: callback for when data from a new position is needed
-            to continue playback
-        :type seek_data: callable which takes time position in ms
-        """
-        self._appsrc.prepare(
-            Gst.Caps.from_string(caps), need_data, enough_data, seek_data
-        )
-        uri = "appsrc://"
-        self._pending_uri = uri
-        self._playbin.set_property("uri", uri)
-
-    def emit_data(self, buffer_):
-        """
-        Call this to deliver raw audio data to be played.
-
-        If the buffer is :class:`None`, the end-of-stream token is put on the
-        playbin. We will get a GStreamer message when the stream playback
-        reaches the token, and can then do any end-of-stream related tasks.
-
-        Note that the URI must be set to ``appsrc://`` for this to work.
-
-        Returns :class:`True` if data was delivered.
-
-        :param buffer_: buffer to pass to appsrc
-        :type buffer_: :class:`Gst.Buffer` or :class:`None`
-        :rtype: boolean
-        """
-        return self._appsrc.push(buffer_)
-
-    def set_about_to_finish_callback(self, callback):
-        """
-        Configure audio to use an about-to-finish callback.
-
-        This should be used to achieve gapless playback. For this to work the
-        callback *MUST* call :meth:`set_uri` with the new URI to play and
-        block until this call has been made. :meth:`prepare_change` is not
-        needed before :meth:`set_uri` in this one special case.
-
-        :param callable callback: Callback to run when we need the next URI.
-        """
-        self._about_to_finish_callback = callback
-
-    def get_position(self):
-        """
-        Get position in milliseconds.
-
-        :rtype: int
-        """
-        success, position = self._playbin.query_position(Gst.Format.TIME)
-
-        if not success:
-            # TODO: take state into account for this and possibly also return
-            # None as the unknown value instead of zero?
-            logger.debug("Position query failed")
-            return 0
-
-        return utils.clocktime_to_millisecond(position)
-
-    def set_position(self, position):
-        """
-        Set position in milliseconds.
-
-        :param position: the position in milliseconds
-        :type position: int
-        :rtype: :class:`True` if successful, else :class:`False`
-        """
-        # TODO: double check seek flags in use.
-        gst_position = utils.millisecond_to_clocktime(position)
-        gst_logger.debug("Sending flushing seek: position=%r", gst_position)
-        # Send seek event to the queue not the playbin. The default behavior
-        # for bins is to forward this event to all sinks. Which results in
-        # duplicate seek events making it to appsrc. Since elements are not
-        # allowed to act on the seek event, only modify it, this should be safe
-        # to do.
-        result = self._queue.seek_simple(
-            Gst.Format.TIME, Gst.SeekFlags.FLUSH, gst_position
-        )
-        return result
-
-    def start_playback(self):
-        """
-        Notify GStreamer that it should start playback.
-
-        :rtype: :class:`True` if successfull, else :class:`False`
-        """
-        return self._set_state(Gst.State.PLAYING)
-
-    def pause_playback(self):
-        """
-        Notify GStreamer that it should pause playback.
-
-        :rtype: :class:`True` if successfull, else :class:`False`
-        """
-        return self._set_state(Gst.State.PAUSED)
-
-    def prepare_change(self):
-        """
-        Notify GStreamer that we are about to change state of playback.
-
-        This function *MUST* be called before changing URIs or doing
-        changes like updating data that is being pushed. The reason for this
-        is that GStreamer will reset all its state when it changes to
-        :attr:`Gst.State.READY`.
-        """
-        return self._set_state(Gst.State.READY)
-
-    def stop_playback(self):
-        """
-        Notify GStreamer that is should stop playback.
-
-        :rtype: :class:`True` if successfull, else :class:`False`
-        """
-        return self._set_state(Gst.State.NULL)
-
-    def wait_for_state_change(self):
-        """Block until any pending state changes are complete.
-
-        Should only be used by tests.
-        """
-        self._playbin.get_state(timeout=Gst.CLOCK_TIME_NONE)
-
-    def enable_sync_handler(self):
-        """Enable manual processing of messages from bus.
-
-        Should only be used by tests.
-        """
-
-        def sync_handler(bus, message):
-            self._handler.on_message(bus, message)
-            return Gst.BusSyncReply.DROP
-
-        bus = self._playbin.get_bus()
-        bus.set_sync_handler(sync_handler)
-
-    def _set_state(self, state):
-        """
-        Internal method for setting the raw GStreamer state.
-
-        .. digraph:: gst_state_transitions
-
-            graph [rankdir="LR"];
-            node [fontsize=10];
-
-            "NULL" -> "READY"
-            "PAUSED" -> "PLAYING"
-            "PAUSED" -> "READY"
-            "PLAYING" -> "PAUSED"
-            "READY" -> "NULL"
-            "READY" -> "PAUSED"
-
-        :param state: State to set playbin to. One of: `Gst.State.NULL`,
-            `Gst.State.READY`, `Gst.State.PAUSED` and `Gst.State.PLAYING`.
-        :type state: :class:`Gst.State`
-        :rtype: :class:`True` if successfull, else :class:`False`
-        """
-        if state < Gst.State.PAUSED:
-            self._buffering = False
-
-        self._target_state = state
-        result = self._playbin.set_state(state)
-        gst_logger.debug(
-            "Changing state to %s: result=%s",
-            state.value_name,
-            result.value_name,
-        )
-
-        if result == Gst.StateChangeReturn.FAILURE:
-            logger.warning(
-                "Setting GStreamer state to %s failed", state.value_name
-            )
-            return False
-        # TODO: at this point we could already emit stopped event instead
-        # of faking it in the message handling when result=OK
-        return True
-
-    # TODO: bake this into setup appsrc perhaps?
-    def set_metadata(self, track):
-        """
-        Set track metadata for currently playing song.
-
-        Only needs to be called by sources such as ``appsrc`` which do not
-        already inject tags in playbin, e.g. when using :meth:`emit_data` to
-        deliver raw audio data to GStreamer.
-
-        :param track: the current track
-        :type track: :class:`mopidy.models.Track`
-        """
-        taglist = Gst.TagList.new_empty()
-        artists = [a for a in (track.artists or []) if a.name]
-
-        def set_value(tag, value):
-            gobject_value = GObject.Value()
-            gobject_value.init(GObject.TYPE_STRING)
-            gobject_value.set_string(value)
-            taglist.add_value(Gst.TagMergeMode.REPLACE, tag, gobject_value)
-
-        # Default to blank data to trick shoutcast into clearing any previous
-        # values it might have.
-        # TODO: Verify if this works at all, likely it doesn't.
-        set_value(Gst.TAG_ARTIST, " ")
-        set_value(Gst.TAG_TITLE, " ")
-        set_value(Gst.TAG_ALBUM, " ")
-
-        if artists:
-            set_value(Gst.TAG_ARTIST, ", ".join([a.name for a in artists]))
-
-        if track.name:
-            set_value(Gst.TAG_TITLE, track.name)
-
-        if track.album and track.album.name:
-            set_value(Gst.TAG_ALBUM, track.album.name)
-
-        gst_logger.debug(
-            "Sending TAG event for track %r: %r", track.uri, taglist.to_string()
-        )
-        event = Gst.Event.new_tag(taglist)
-        if self._pending_uri:
-            self._pending_metadata = event
-        else:
-            self._playbin.send_event(event)
-
-    def get_current_tags(self):
-        """
-        Get the currently playing media's tags.
-
-        If no tags have been found, or nothing is playing this returns an empty
-        dictionary. For each set of tags we collect a tags_changed event is
-        emitted with the keys of the changes tags. After such calls users may
-        call this function to get the updated values.
-
-        :rtype: {key: [values]} dict for the current media.
-        """
-        # TODO: should this be a (deep) copy? most likely yes
-        # TODO: should we return None when stopped?
-        # TODO: support only fetching keys we care about?
-        return self._tags
diff --git a/venv/lib/python3.7/site-packages/mopidy/audio/constants.py b/venv/lib/python3.7/site-packages/mopidy/audio/constants.py
deleted file mode 100644
index c1046f4..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/audio/constants.py
+++ /dev/null
@@ -1,14 +0,0 @@
-class PlaybackState:
-
-    """
-    Enum of playback states.
-    """
-
-    #: Constant representing the paused state.
-    PAUSED = "paused"
-
-    #: Constant representing the playing state.
-    PLAYING = "playing"
-
-    #: Constant representing the stopped state.
-    STOPPED = "stopped"
diff --git a/venv/lib/python3.7/site-packages/mopidy/audio/listener.py b/venv/lib/python3.7/site-packages/mopidy/audio/listener.py
deleted file mode 100644
index 1b49cf1..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/audio/listener.py
+++ /dev/null
@@ -1,94 +0,0 @@
-from mopidy import listener
-
-
-class AudioListener(listener.Listener):
-
-    """
-    Marker interface for recipients of events sent by the audio actor.
-
-    Any Pykka actor that mixes in this class will receive calls to the methods
-    defined here when the corresponding events happen in the core actor. This
-    interface is used both for looking up what actors to notify of the events,
-    and for providing default implementations for those listeners that are not
-    interested in all events.
-    """
-
-    @staticmethod
-    def send(event, **kwargs):
-        """Helper to allow calling of audio listener events"""
-        listener.send(AudioListener, event, **kwargs)
-
-    def reached_end_of_stream(self):
-        """
-        Called whenever the end of the audio stream is reached.
-
-        *MAY* be implemented by actor.
-        """
-        pass
-
-    def stream_changed(self, uri):
-        """
-        Called whenever the audio stream changes.
-
-        *MAY* be implemented by actor.
-
-        :param string uri: URI the stream has started playing.
-        """
-        pass
-
-    def position_changed(self, position):
-        """
-        Called whenever the position of the stream changes.
-
-        *MAY* be implemented by actor.
-
-        :param int position: Position in milliseconds.
-        """
-        pass
-
-    def state_changed(self, old_state, new_state, target_state):
-        """
-        Called after the playback state have changed.
-
-        Will be called for both immediate and async state changes in GStreamer.
-
-        Target state is used to when we should be in the target state, but
-        temporarily need to switch to an other state. A typical example of this
-        is buffering. When this happens an event with
-        `old=PLAYING, new=PAUSED, target=PLAYING` will be emitted. Once we have
-        caught up a `old=PAUSED, new=PLAYING, target=None` event will be
-        be generated.
-
-        Regular state changes will not have target state set as they are final
-        states which should be stable.
-
-        *MAY* be implemented by actor.
-
-        :param old_state: the state before the change
-        :type old_state: string from :class:`mopidy.core.PlaybackState` field
-        :param new_state: the state after the change
-        :type new_state: A :class:`mopidy.core.PlaybackState` field
-        :type new_state: string from :class:`mopidy.core.PlaybackState` field
-        :param target_state: the intended state
-        :type target_state: string from :class:`mopidy.core.PlaybackState`
-            field or :class:`None` if this is a final state.
-        """
-        pass
-
-    def tags_changed(self, tags):
-        """
-        Called whenever the current audio stream's tags change.
-
-        This event signals that some track metadata has been updated. This can
-        be metadata such as artists, titles, organization, or details about the
-        actual audio such as bit-rates, numbers of channels etc.
-
-        For the available tag keys please refer to GStreamer documentation for
-        tags.
-
-        *MAY* be implemented by actor.
-
-        :param tags: The tags that have just been updated.
-        :type tags: :class:`set` of strings
-        """
-        pass
diff --git a/venv/lib/python3.7/site-packages/mopidy/audio/scan.py b/venv/lib/python3.7/site-packages/mopidy/audio/scan.py
deleted file mode 100644
index beb29f0..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/audio/scan.py
+++ /dev/null
@@ -1,302 +0,0 @@
-import collections
-import logging
-import time
-
-from mopidy import exceptions
-from mopidy.audio import tags as tags_lib
-from mopidy.audio import utils
-from mopidy.internal import log
-from mopidy.internal.gi import Gst, GstPbutils
-
-# GST_ELEMENT_FACTORY_LIST:
-_DECODER = 1 << 0
-_AUDIO = 1 << 50
-_DEMUXER = 1 << 5
-_DEPAYLOADER = 1 << 8
-_PARSER = 1 << 6
-
-# GST_TYPE_AUTOPLUG_SELECT_RESULT:
-_SELECT_TRY = 0
-_SELECT_EXPOSE = 1
-
-_Result = collections.namedtuple(
-    "Result", ("uri", "tags", "duration", "seekable", "mime", "playable")
-)
-
-logger = logging.getLogger(__name__)
-
-
-def _trace(*args, **kwargs):
-    logger.log(log.TRACE_LOG_LEVEL, *args, **kwargs)
-
-
-# TODO: replace with a scan(uri, timeout=1000, proxy_config=None)?
-class Scanner:
-
-    """
-    Helper to get tags and other relevant info from URIs.
-
-    :param timeout: timeout for scanning a URI in ms
-    :param proxy_config: dictionary containing proxy config strings.
-    :type event: int
-    """
-
-    def __init__(self, timeout=1000, proxy_config=None):
-        self._timeout_ms = int(timeout)
-        self._proxy_config = proxy_config or {}
-
-    def scan(self, uri, timeout=None):
-        """
-        Scan the given uri collecting relevant metadata.
-
-        :param uri: URI of the resource to scan.
-        :type uri: string
-        :param timeout: timeout for scanning a URI in ms. Defaults to the
-            ``timeout`` value used when creating the scanner.
-        :type timeout: int
-        :return: A named tuple containing
-            ``(uri, tags, duration, seekable, mime)``.
-            ``tags`` is a dictionary of lists for all the tags we found.
-            ``duration`` is the length of the URI in milliseconds, or
-            :class:`None` if the URI has no duration. ``seekable`` is boolean.
-            indicating if a seek would succeed.
-        """
-        timeout = int(timeout or self._timeout_ms)
-        tags, duration, seekable, mime = None, None, None, None
-        pipeline, signals = _setup_pipeline(uri, self._proxy_config)
-
-        try:
-            _start_pipeline(pipeline)
-            tags, mime, have_audio, duration = _process(pipeline, timeout)
-            seekable = _query_seekable(pipeline)
-        finally:
-            signals.clear()
-            pipeline.set_state(Gst.State.NULL)
-            del pipeline
-
-        return _Result(uri, tags, duration, seekable, mime, have_audio)
-
-
-# Turns out it's _much_ faster to just create a new pipeline for every as
-# decodebins and other elements don't seem to take well to being reused.
-def _setup_pipeline(uri, proxy_config=None):
-    src = Gst.Element.make_from_uri(Gst.URIType.SRC, uri)
-    if not src:
-        raise exceptions.ScannerError(f"GStreamer can not open: {uri}")
-
-    if proxy_config:
-        utils.setup_proxy(src, proxy_config)
-
-    signals = utils.Signals()
-    pipeline = Gst.ElementFactory.make("pipeline")
-    pipeline.add(src)
-
-    if _has_src_pads(src):
-        _setup_decodebin(src, src.get_static_pad("src"), pipeline, signals)
-    elif _has_dynamic_src_pad(src):
-        signals.connect(src, "pad-added", _setup_decodebin, pipeline, signals)
-    else:
-        raise exceptions.ScannerError("No pads found in source element.")
-
-    return pipeline, signals
-
-
-def _has_src_pads(element):
-    pads = []
-    element.iterate_src_pads().foreach(pads.append)
-    return bool(pads)
-
-
-def _has_dynamic_src_pad(element):
-    for template in element.get_pad_template_list():
-        if template.direction == Gst.PadDirection.SRC:
-            if template.presence == Gst.PadPresence.SOMETIMES:
-                return True
-    return False
-
-
-def _setup_decodebin(element, pad, pipeline, signals):
-    typefind = Gst.ElementFactory.make("typefind")
-    decodebin = Gst.ElementFactory.make("decodebin")
-
-    for element in (typefind, decodebin):
-        pipeline.add(element)
-        element.sync_state_with_parent()
-
-    pad.link(typefind.get_static_pad("sink"))
-    typefind.link(decodebin)
-
-    signals.connect(typefind, "have-type", _have_type, decodebin)
-    signals.connect(decodebin, "pad-added", _pad_added, pipeline)
-    signals.connect(decodebin, "autoplug-select", _autoplug_select)
-
-
-def _have_type(element, probability, caps, decodebin):
-    decodebin.set_property("sink-caps", caps)
-    struct = Gst.Structure.new_empty("have-type")
-    struct.set_value("caps", caps.get_structure(0))
-    element.get_bus().post(Gst.Message.new_application(element, struct))
-
-
-def _pad_added(element, pad, pipeline):
-    sink = Gst.ElementFactory.make("fakesink")
-    sink.set_property("sync", False)
-
-    pipeline.add(sink)
-    sink.sync_state_with_parent()
-    pad.link(sink.get_static_pad("sink"))
-
-    if pad.query_caps().is_subset(Gst.Caps.from_string("audio/x-raw")):
-        # Probably won't happen due to autoplug-select fix, but lets play it
-        # safe until we've tested more.
-        struct = Gst.Structure.new_empty("have-audio")
-        element.get_bus().post(Gst.Message.new_application(element, struct))
-
-
-def _autoplug_select(element, pad, caps, factory):
-    if factory.list_is_type(_DECODER | _AUDIO):
-        struct = Gst.Structure.new_empty("have-audio")
-        element.get_bus().post(Gst.Message.new_application(element, struct))
-    if not factory.list_is_type(_DEMUXER | _DEPAYLOADER | _PARSER):
-        return _SELECT_EXPOSE
-    return _SELECT_TRY
-
-
-def _start_pipeline(pipeline):
-    result = pipeline.set_state(Gst.State.PAUSED)
-    if result == Gst.StateChangeReturn.NO_PREROLL:
-        pipeline.set_state(Gst.State.PLAYING)
-
-
-def _query_duration(pipeline):
-    success, duration = pipeline.query_duration(Gst.Format.TIME)
-    if not success:
-        duration = None  # Make sure error case preserves None.
-    elif duration < 0:
-        duration = None  # Stream without duration.
-    else:
-        duration = int(duration // Gst.MSECOND)
-    return success, duration
-
-
-def _query_seekable(pipeline):
-    query = Gst.Query.new_seeking(Gst.Format.TIME)
-    pipeline.query(query)
-    return query.parse_seeking()[1]
-
-
-def _process(pipeline, timeout_ms):
-    bus = pipeline.get_bus()
-    tags = {}
-    mime = None
-    have_audio = False
-    missing_message = None
-    duration = None
-
-    types = (
-        Gst.MessageType.ELEMENT
-        | Gst.MessageType.APPLICATION
-        | Gst.MessageType.ERROR
-        | Gst.MessageType.EOS
-        | Gst.MessageType.ASYNC_DONE
-        | Gst.MessageType.DURATION_CHANGED
-        | Gst.MessageType.TAG
-    )
-
-    timeout = timeout_ms
-    start = int(time.time() * 1000)
-    while timeout > 0:
-        msg = bus.timed_pop_filtered(timeout * Gst.MSECOND, types)
-        if msg is None:
-            break
-
-        if logger.isEnabledFor(log.TRACE_LOG_LEVEL) and msg.get_structure():
-            debug_text = msg.get_structure().to_string()
-            if len(debug_text) > 77:
-                debug_text = debug_text[:77] + "..."
-            _trace("element %s: %s", msg.src.get_name(), debug_text)
-
-        if msg.type == Gst.MessageType.ELEMENT:
-            if GstPbutils.is_missing_plugin_message(msg):
-                missing_message = msg
-        elif msg.type == Gst.MessageType.APPLICATION:
-            if msg.get_structure().get_name() == "have-type":
-                mime = msg.get_structure().get_value("caps").get_name()
-                if mime and (
-                    mime.startswith("text/") or mime == "application/xml"
-                ):
-                    return tags, mime, have_audio, duration
-            elif msg.get_structure().get_name() == "have-audio":
-                have_audio = True
-        elif msg.type == Gst.MessageType.ERROR:
-            error, _debug = msg.parse_error()
-            if missing_message and not mime:
-                caps = missing_message.get_structure().get_value("detail")
-                mime = caps.get_structure(0).get_name()
-                return tags, mime, have_audio, duration
-            raise exceptions.ScannerError(str(error))
-        elif msg.type == Gst.MessageType.EOS:
-            return tags, mime, have_audio, duration
-        elif msg.type == Gst.MessageType.ASYNC_DONE:
-            success, duration = _query_duration(pipeline)
-            if tags and success:
-                return tags, mime, have_audio, duration
-
-            # Don't try workaround for non-seekable sources such as mmssrc:
-            if not _query_seekable(pipeline):
-                return tags, mime, have_audio, duration
-
-            # Workaround for upstream bug which causes tags/duration to arrive
-            # after pre-roll. We get around this by starting to play the track
-            # and then waiting for a duration change.
-            # https://bugzilla.gnome.org/show_bug.cgi?id=763553
-            logger.debug("Using workaround for duration missing before play.")
-            result = pipeline.set_state(Gst.State.PLAYING)
-            if result == Gst.StateChangeReturn.FAILURE:
-                return tags, mime, have_audio, duration
-
-        elif msg.type == Gst.MessageType.DURATION_CHANGED and tags:
-            # VBR formats sometimes seem to not have a duration by the time we
-            # go back to paused. So just try to get it right away.
-            success, duration = _query_duration(pipeline)
-            pipeline.set_state(Gst.State.PAUSED)
-            if success:
-                return tags, mime, have_audio, duration
-        elif msg.type == Gst.MessageType.TAG:
-            taglist = msg.parse_tag()
-            # Note that this will only keep the last tag.
-            tags.update(tags_lib.convert_taglist(taglist))
-
-        timeout = timeout_ms - (int(time.time() * 1000) - start)
-
-    raise exceptions.ScannerError(f"Timeout after {timeout_ms:d}ms")
-
-
-if __name__ == "__main__":
-    import os
-    import sys
-
-    from mopidy.internal import path
-
-    logging.basicConfig(
-        format="%(asctime)-15s %(levelname)s %(message)s",
-        level=log.TRACE_LOG_LEVEL,
-    )
-
-    scanner = Scanner(5000)
-    for uri in sys.argv[1:]:
-        if not Gst.uri_is_valid(uri):
-            uri = path.path_to_uri(os.path.abspath(uri))
-        try:
-            result = scanner.scan(uri)
-            for key in ("uri", "mime", "duration", "playable", "seekable"):
-                value = getattr(result, key)
-                print(f"{key:<20}   {value}")
-            print("tags")
-            for tag, value in result.tags.items():
-                line = f"{tag:<20}   {value}"
-                if len(line) > 77:
-                    line = line[:77] + "..."
-                print(line)
-        except exceptions.ScannerError as error:
-            print(f"{uri}: {error}")
diff --git a/venv/lib/python3.7/site-packages/mopidy/audio/tags.py b/venv/lib/python3.7/site-packages/mopidy/audio/tags.py
deleted file mode 100644
index f26c731..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/audio/tags.py
+++ /dev/null
@@ -1,161 +0,0 @@
-import collections
-import datetime
-import logging
-import numbers
-
-from mopidy.internal import log
-from mopidy.internal.gi import GLib, Gst
-from mopidy.models import Album, Artist, Track
-
-logger = logging.getLogger(__name__)
-
-
-def convert_taglist(taglist):
-    """Convert a :class:`Gst.TagList` to plain Python types.
-
-    Knows how to convert:
-
-    - Dates
-    - Buffers
-    - Numbers
-    - Strings
-    - Booleans
-
-    Unknown types will be ignored and trace logged. Tag keys are all strings
-    defined as part GStreamer under GstTagList_.
-
-    .. _GstTagList: https://developer.gnome.org/gstreamer/stable/\
-gstreamer-GstTagList.html
-
-    :param taglist: A GStreamer taglist to be converted.
-    :type taglist: :class:`Gst.TagList`
-    :rtype: dictionary of tag keys with a list of values.
-    """
-    result = collections.defaultdict(list)
-
-    for n in range(taglist.n_tags()):
-        tag = taglist.nth_tag_name(n)
-
-        for i in range(taglist.get_tag_size(tag)):
-            value = taglist.get_value_index(tag, i)
-
-            if isinstance(value, GLib.Date):
-                try:
-                    date = datetime.date(
-                        value.get_year(), value.get_month(), value.get_day()
-                    )
-                    result[tag].append(date.isoformat())
-                except ValueError:
-                    logger.debug(
-                        "Ignoring dodgy date value: %d-%d-%d",
-                        value.get_year(),
-                        value.get_month(),
-                        value.get_day(),
-                    )
-            elif isinstance(value, Gst.DateTime):
-                result[tag].append(value.to_iso8601_string())
-            elif isinstance(value, bytes):
-                result[tag].append(value.decode(errors="replace"))
-            elif isinstance(value, (str, bool, numbers.Number)):
-                result[tag].append(value)
-            elif isinstance(value, Gst.Sample):
-                data = _extract_sample_data(value)
-                if data:
-                    result[tag].append(data)
-            else:
-                logger.log(
-                    log.TRACE_LOG_LEVEL,
-                    "Ignoring unknown tag data: %r = %r",
-                    tag,
-                    value,
-                )
-
-    # TODO: dict(result) to not leak the defaultdict, or just use setdefault?
-    return result
-
-
-def _extract_sample_data(sample):
-    buf = sample.get_buffer()
-    if not buf:
-        return None
-    return buf.extract_dup(0, buf.get_size())
-
-
-# TODO: split based on "stream" and "track" based conversion? i.e. handle data
-# from radios in it's own helper instead?
-def convert_tags_to_track(tags):
-    """Convert our normalized tags to a track.
-
-    :param  tags: dictionary of tag keys with a list of values
-    :type tags: :class:`dict`
-    :rtype: :class:`mopidy.models.Track`
-    """
-    album_kwargs = {}
-    track_kwargs = {}
-
-    track_kwargs["composers"] = _artists(tags, Gst.TAG_COMPOSER)
-    track_kwargs["performers"] = _artists(tags, Gst.TAG_PERFORMER)
-    track_kwargs["artists"] = _artists(
-        tags, Gst.TAG_ARTIST, "musicbrainz-artistid", "musicbrainz-sortname"
-    )
-    album_kwargs["artists"] = _artists(
-        tags, Gst.TAG_ALBUM_ARTIST, "musicbrainz-albumartistid"
-    )
-
-    track_kwargs["genre"] = "; ".join(tags.get(Gst.TAG_GENRE, []))
-    track_kwargs["name"] = "; ".join(tags.get(Gst.TAG_TITLE, []))
-    if not track_kwargs["name"]:
-        track_kwargs["name"] = "; ".join(tags.get(Gst.TAG_ORGANIZATION, []))
-
-    track_kwargs["comment"] = "; ".join(tags.get("comment", []))
-    if not track_kwargs["comment"]:
-        track_kwargs["comment"] = "; ".join(tags.get(Gst.TAG_LOCATION, []))
-    if not track_kwargs["comment"]:
-        track_kwargs["comment"] = "; ".join(tags.get(Gst.TAG_COPYRIGHT, []))
-
-    track_kwargs["track_no"] = tags.get(Gst.TAG_TRACK_NUMBER, [None])[0]
-    track_kwargs["disc_no"] = tags.get(Gst.TAG_ALBUM_VOLUME_NUMBER, [None])[0]
-    track_kwargs["bitrate"] = tags.get(Gst.TAG_BITRATE, [None])[0]
-    track_kwargs["musicbrainz_id"] = tags.get("musicbrainz-trackid", [None])[0]
-
-    album_kwargs["name"] = tags.get(Gst.TAG_ALBUM, [None])[0]
-    album_kwargs["num_tracks"] = tags.get(Gst.TAG_TRACK_COUNT, [None])[0]
-    album_kwargs["num_discs"] = tags.get(Gst.TAG_ALBUM_VOLUME_COUNT, [None])[0]
-    album_kwargs["musicbrainz_id"] = tags.get("musicbrainz-albumid", [None])[0]
-
-    album_kwargs["date"] = tags.get(Gst.TAG_DATE, [None])[0]
-    if not album_kwargs["date"]:
-        datetime = tags.get(Gst.TAG_DATE_TIME, [None])[0]
-        if datetime is not None:
-            album_kwargs["date"] = datetime.split("T")[0]
-    track_kwargs["date"] = album_kwargs["date"]
-
-    # Clear out any empty values we found
-    track_kwargs = {k: v for k, v in track_kwargs.items() if v}
-    album_kwargs = {k: v for k, v in album_kwargs.items() if v}
-
-    # Only bother with album if we have a name to show.
-    if album_kwargs.get("name"):
-        track_kwargs["album"] = Album(**album_kwargs)
-
-    return Track(**track_kwargs)
-
-
-def _artists(tags, artist_name, artist_id=None, artist_sortname=None):
-    # Name missing, don't set artist
-    if not tags.get(artist_name):
-        return None
-
-    # One artist name and either id or sortname, include all available fields
-    if len(tags[artist_name]) == 1 and (
-        artist_id in tags or artist_sortname in tags
-    ):
-        attrs = {"name": tags[artist_name][0]}
-        if artist_id in tags:
-            attrs["musicbrainz_id"] = tags[artist_id][0]
-        if artist_sortname in tags:
-            attrs["sortname"] = tags[artist_sortname][0]
-        return [Artist(**attrs)]
-
-    # Multiple artist, provide artists with name only to avoid ambiguity.
-    return [Artist(name=name) for name in tags[artist_name]]
diff --git a/venv/lib/python3.7/site-packages/mopidy/audio/utils.py b/venv/lib/python3.7/site-packages/mopidy/audio/utils.py
deleted file mode 100644
index 7ec36d3..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/audio/utils.py
+++ /dev/null
@@ -1,100 +0,0 @@
-from mopidy import httpclient
-from mopidy.internal.gi import Gst
-
-
-def calculate_duration(num_samples, sample_rate):
-    """Determine duration of samples using GStreamer helper for precise
-    math."""
-    return Gst.util_uint64_scale(num_samples, Gst.SECOND, sample_rate)
-
-
-def create_buffer(data, timestamp=None, duration=None):
-    """Create a new GStreamer buffer based on provided data.
-
-    Mainly intended to keep gst imports out of non-audio modules.
-
-    .. versionchanged:: 2.0
-        ``capabilites`` argument was removed.
-    """
-    if not data:
-        raise ValueError("Cannot create buffer without data")
-    buffer_ = Gst.Buffer.new_wrapped(data)
-    if timestamp is not None:
-        buffer_.pts = timestamp
-    if duration is not None:
-        buffer_.duration = duration
-    return buffer_
-
-
-def millisecond_to_clocktime(value):
-    """Convert a millisecond time to internal GStreamer time."""
-    return value * Gst.MSECOND
-
-
-def clocktime_to_millisecond(value):
-    """Convert an internal GStreamer time to millisecond time."""
-    return value // Gst.MSECOND
-
-
-def supported_uri_schemes(uri_schemes):
-    """Determine which URIs we can actually support from provided whitelist.
-
-    :param uri_schemes: list/set of URIs to check support for.
-    :type uri_schemes: list or set or URI schemes as strings.
-    :rtype: set of URI schemes we can support via this GStreamer install.
-    """
-    supported_schemes = set()
-    registry = Gst.Registry.get()
-
-    for factory in registry.get_feature_list(Gst.ElementFactory):
-        for uri in factory.get_uri_protocols():
-            if uri in uri_schemes:
-                supported_schemes.add(uri)
-
-    return supported_schemes
-
-
-def setup_proxy(element, config):
-    """Configure a GStreamer element with proxy settings.
-
-    :param element: element to setup proxy in.
-    :type element: :class:`Gst.GstElement`
-    :param config: proxy settings to use.
-    :type config: :class:`dict`
-    """
-    if not hasattr(element.props, "proxy") or not config.get("hostname"):
-        return
-
-    element.set_property("proxy", httpclient.format_proxy(config, auth=False))
-    element.set_property("proxy-id", config.get("username"))
-    element.set_property("proxy-pw", config.get("password"))
-
-
-class Signals:
-
-    """Helper for tracking gobject signal registrations"""
-
-    def __init__(self):
-        self._ids = {}
-
-    def connect(self, element, event, func, *args):
-        """Connect a function + args to signal event on an element.
-
-        Each event may only be handled by one callback in this implementation.
-        """
-        assert (element, event) not in self._ids
-        self._ids[(element, event)] = element.connect(event, func, *args)
-
-    def disconnect(self, element, event):
-        """Disconnect whatever handler we have for an element+event pair.
-
-        Does nothing it the handler has already been removed.
-        """
-        signal_id = self._ids.pop((element, event), None)
-        if signal_id is not None:
-            element.disconnect(signal_id)
-
-    def clear(self):
-        """Clear all registered signal handlers."""
-        for element, event in list(self._ids):
-            element.disconnect(self._ids.pop((element, event)))
diff --git a/venv/lib/python3.7/site-packages/mopidy/backend.py b/venv/lib/python3.7/site-packages/mopidy/backend.py
deleted file mode 100644
index 40b4eca..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/backend.py
+++ /dev/null
@@ -1,445 +0,0 @@
-import logging
-
-import pykka
-
-from mopidy import listener
-
-logger = logging.getLogger(__name__)
-
-
-class Backend:
-
-    """Backend API
-
-    If the backend has problems during initialization it should raise
-    :exc:`mopidy.exceptions.BackendError` with a descriptive error message.
-    This will make Mopidy print the error message and exit so that the user can
-    fix the issue.
-
-    :param config: the entire Mopidy configuration
-    :type config: dict
-    :param audio: actor proxy for the audio subsystem
-    :type audio: :class:`pykka.ActorProxy` for :class:`mopidy.audio.Audio`
-    """
-
-    #: Actor proxy to an instance of :class:`mopidy.audio.Audio`.
-    #:
-    #: Should be passed to the backend constructor as the kwarg ``audio``,
-    #: which will then set this field.
-    audio = None
-
-    #: The library provider. An instance of
-    #: :class:`~mopidy.backend.LibraryProvider`, or :class:`None` if
-    #: the backend doesn't provide a library.
-    library = None
-
-    #: The playback provider. An instance of
-    #: :class:`~mopidy.backend.PlaybackProvider`, or :class:`None` if
-    #: the backend doesn't provide playback.
-    playback = None
-
-    #: The playlists provider. An instance of
-    #: :class:`~mopidy.backend.PlaylistsProvider`, or class:`None` if
-    #: the backend doesn't provide playlists.
-    playlists = None
-
-    #: List of URI schemes this backend can handle.
-    uri_schemes = []
-
-    # Because the providers is marked as pykka.traversable(), we can't get()
-    # them from another actor, and need helper methods to check if the
-    # providers are set or None.
-
-    def has_library(self):
-        return self.library is not None
-
-    def has_library_browse(self):
-        return self.has_library() and self.library.root_directory is not None
-
-    def has_playback(self):
-        return self.playback is not None
-
-    def has_playlists(self):
-        return self.playlists is not None
-
-    def ping(self):
-        """Called to check if the actor is still alive."""
-        return True
-
-
-@pykka.traversable
-class LibraryProvider:
-
-    """
-    :param backend: backend the controller is a part of
-    :type backend: :class:`mopidy.backend.Backend`
-    """
-
-    root_directory = None
-    """
-    :class:`mopidy.models.Ref.directory` instance with a URI and name set
-    representing the root of this library's browse tree. URIs must
-    use one of the schemes supported by the backend, and name should
-    be set to a human friendly value.
-
-    *MUST be set by any class that implements* :meth:`LibraryProvider.browse`.
-    """
-
-    def __init__(self, backend):
-        self.backend = backend
-
-    def browse(self, uri):
-        """
-        See :meth:`mopidy.core.LibraryController.browse`.
-
-        If you implement this method, make sure to also set
-        :attr:`root_directory`.
-
-        *MAY be implemented by subclass.*
-        """
-        return []
-
-    def get_distinct(self, field, query=None):
-        """
-        See :meth:`mopidy.core.LibraryController.get_distinct`.
-
-        *MAY be implemented by subclass.*
-
-        Default implementation will simply return an empty set.
-
-        Note that backends should always return an empty set for unexpected
-        field types.
-        """
-        return set()
-
-    def get_images(self, uris):
-        """
-        See :meth:`mopidy.core.LibraryController.get_images`.
-
-        *MAY be implemented by subclass.*
-
-        Default implementation will simply return an empty dictionary.
-        """
-        return {}
-
-    def lookup(self, uri):
-        """
-        See :meth:`mopidy.core.LibraryController.lookup`.
-
-        *MUST be implemented by subclass.*
-        """
-        raise NotImplementedError
-
-    def refresh(self, uri=None):
-        """
-        See :meth:`mopidy.core.LibraryController.refresh`.
-
-        *MAY be implemented by subclass.*
-        """
-        pass
-
-    def search(self, query=None, uris=None, exact=False):
-        """
-        See :meth:`mopidy.core.LibraryController.search`.
-
-        *MAY be implemented by subclass.*
-
-        .. versionadded:: 1.0
-            The ``exact`` param which replaces the old ``find_exact``.
-        """
-        pass
-
-
-@pykka.traversable
-class PlaybackProvider:
-
-    """
-    :param audio: the audio actor
-    :type audio: actor proxy to an instance of :class:`mopidy.audio.Audio`
-    :param backend: the backend
-    :type backend: :class:`mopidy.backend.Backend`
-    """
-
-    def __init__(self, audio, backend):
-        self.audio = audio
-        self.backend = backend
-
-    def pause(self):
-        """
-        Pause playback.
-
-        *MAY be reimplemented by subclass.*
-
-        :rtype: :class:`True` if successful, else :class:`False`
-        """
-        return self.audio.pause_playback().get()
-
-    def play(self):
-        """
-        Start playback.
-
-        *MAY be reimplemented by subclass.*
-
-        :rtype: :class:`True` if successful, else :class:`False`
-        """
-        return self.audio.start_playback().get()
-
-    def prepare_change(self):
-        """
-        Indicate that an URI change is about to happen.
-
-        *MAY be reimplemented by subclass.*
-
-        It is extremely unlikely it makes sense for any backends to override
-        this. For most practical purposes it should be considered an internal
-        call between backends and core that backend authors should not touch.
-        """
-        self.audio.prepare_change().get()
-
-    def translate_uri(self, uri):
-        """
-        Convert custom URI scheme to real playable URI.
-
-        *MAY be reimplemented by subclass.*
-
-        This is very likely the *only* thing you need to override as a backend
-        author. Typically this is where you convert any Mopidy specific URI
-        to a real URI and then return it. If you can't convert the URI just
-        return :class:`None`.
-
-        :param uri: the URI to translate
-        :type uri: string
-        :rtype: string or :class:`None` if the URI could not be translated
-        """
-        return uri
-
-    def is_live(self, uri):
-        """
-        Decide if the URI should be threated as a live stream or not.
-
-        *MAY be reimplemented by subclass.*
-
-        Playing a source as a live stream disables buffering, which reduces
-        latency before playback starts, and discards data when paused.
-
-        :param uri: the URI
-        :type uri: string
-        :rtype: bool
-        """
-        return False
-
-    def change_track(self, track):
-        """
-        Swith to provided track.
-
-        *MAY be reimplemented by subclass.*
-
-        It is unlikely it makes sense for any backends to override
-        this. For most practical purposes it should be considered an internal
-        call between backends and core that backend authors should not touch.
-
-        The default implementation will call :meth:`translate_uri` which
-        is what you want to implement.
-
-        :param track: the track to play
-        :type track: :class:`mopidy.models.Track`
-        :rtype: :class:`True` if successful, else :class:`False`
-        """
-        uri = self.translate_uri(track.uri)
-        if uri != track.uri:
-            logger.debug("Backend translated URI from %s to %s", track.uri, uri)
-        if not uri:
-            return False
-        self.audio.set_uri(uri, live_stream=self.is_live(uri)).get()
-        return True
-
-    def resume(self):
-        """
-        Resume playback at the same time position playback was paused.
-
-        *MAY be reimplemented by subclass.*
-
-        :rtype: :class:`True` if successful, else :class:`False`
-        """
-        return self.audio.start_playback().get()
-
-    def seek(self, time_position):
-        """
-        Seek to a given time position.
-
-        *MAY be reimplemented by subclass.*
-
-        :param time_position: time position in milliseconds
-        :type time_position: int
-        :rtype: :class:`True` if successful, else :class:`False`
-        """
-        return self.audio.set_position(time_position).get()
-
-    def stop(self):
-        """
-        Stop playback.
-
-        *MAY be reimplemented by subclass.*
-
-        Should not be used for tracking if tracks have been played or when we
-        are done playing them.
-
-        :rtype: :class:`True` if successful, else :class:`False`
-        """
-        return self.audio.stop_playback().get()
-
-    def get_time_position(self):
-        """
-        Get the current time position in milliseconds.
-
-        *MAY be reimplemented by subclass.*
-
-        :rtype: int
-        """
-        return self.audio.get_position().get()
-
-
-@pykka.traversable
-class PlaylistsProvider:
-
-    """
-    A playlist provider exposes a collection of playlists, methods to
-    create/change/delete playlists in this collection, and lookup of any
-    playlist the backend knows about.
-
-    :param backend: backend the controller is a part of
-    :type backend: :class:`mopidy.backend.Backend` instance
-    """
-
-    def __init__(self, backend):
-        self.backend = backend
-
-    def as_list(self):
-        """
-        Get a list of the currently available playlists.
-
-        Returns a list of :class:`~mopidy.models.Ref` objects referring to the
-        playlists. In other words, no information about the playlists' content
-        is given.
-
-        :rtype: list of :class:`mopidy.models.Ref`
-
-        .. versionadded:: 1.0
-        """
-        raise NotImplementedError
-
-    def get_items(self, uri):
-        """
-        Get the items in a playlist specified by ``uri``.
-
-        Returns a list of :class:`~mopidy.models.Ref` objects referring to the
-        playlist's items.
-
-        If a playlist with the given ``uri`` doesn't exist, it returns
-        :class:`None`.
-
-        :rtype: list of :class:`mopidy.models.Ref`, or :class:`None`
-
-        .. versionadded:: 1.0
-        """
-        raise NotImplementedError
-
-    def create(self, name):
-        """
-        Create a new empty playlist with the given name.
-
-        Returns a new playlist with the given name and an URI, or :class:`None`
-        on failure.
-
-        *MUST be implemented by subclass.*
-
-        :param name: name of the new playlist
-        :type name: string
-        :rtype: :class:`mopidy.models.Playlist` or :class:`None`
-        """
-        raise NotImplementedError
-
-    def delete(self, uri):
-        """
-        Delete playlist identified by the URI.
-
-        Returns :class:`True` if deleted, :class:`False` otherwise.
-
-        *MUST be implemented by subclass.*
-
-        :param uri: URI of the playlist to delete
-        :type uri: string
-        :rtype: :class:`bool`
-
-        .. versionchanged:: 2.2
-            Return type defined.
-        """
-        raise NotImplementedError
-
-    def lookup(self, uri):
-        """
-        Lookup playlist with given URI in both the set of playlists and in any
-        other playlist source.
-
-        Returns the playlists or :class:`None` if not found.
-
-        *MUST be implemented by subclass.*
-
-        :param uri: playlist URI
-        :type uri: string
-        :rtype: :class:`mopidy.models.Playlist` or :class:`None`
-        """
-        raise NotImplementedError
-
-    def refresh(self):
-        """
-        Refresh the playlists in :attr:`playlists`.
-
-        *MUST be implemented by subclass.*
-        """
-        raise NotImplementedError
-
-    def save(self, playlist):
-        """
-        Save the given playlist.
-
-        The playlist must have an ``uri`` attribute set. To create a new
-        playlist with an URI, use :meth:`create`.
-
-        Returns the saved playlist or :class:`None` on failure.
-
-        *MUST be implemented by subclass.*
-
-        :param playlist: the playlist to save
-        :type playlist: :class:`mopidy.models.Playlist`
-        :rtype: :class:`mopidy.models.Playlist` or :class:`None`
-        """
-        raise NotImplementedError
-
-
-class BackendListener(listener.Listener):
-
-    """
-    Marker interface for recipients of events sent by the backend actors.
-
-    Any Pykka actor that mixes in this class will receive calls to the methods
-    defined here when the corresponding events happen in a backend actor. This
-    interface is used both for looking up what actors to notify of the events,
-    and for providing default implementations for those listeners that are not
-    interested in all events.
-
-    Normally, only the Core actor should mix in this class.
-    """
-
-    @staticmethod
-    def send(event, **kwargs):
-        """Helper to allow calling of backend listener events"""
-        listener.send(BackendListener, event, **kwargs)
-
-    def playlists_loaded(self):
-        """
-        Called when playlists are loaded or refreshed.
-
-        *MAY* be implemented by actor.
-        """
-        pass
diff --git a/venv/lib/python3.7/site-packages/mopidy/commands.py b/venv/lib/python3.7/site-packages/mopidy/commands.py
deleted file mode 100644
index 8eb345f..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/commands.py
+++ /dev/null
@@ -1,489 +0,0 @@
-import argparse
-import collections
-import contextlib
-import logging
-import os
-import pathlib
-import signal
-import sys
-
-import pykka
-
-from mopidy import config as config_lib
-from mopidy import exceptions
-from mopidy.audio import Audio
-from mopidy.core import Core
-from mopidy.internal import deps, process, timer, versioning
-from mopidy.internal.gi import GLib
-
-logger = logging.getLogger(__name__)
-
-_default_config = [
-    (pathlib.Path(base) / "mopidy" / "mopidy.conf").resolve()
-    for base in GLib.get_system_config_dirs() + [GLib.get_user_config_dir()]
-]
-DEFAULT_CONFIG = ":".join(map(str, _default_config))
-
-
-def config_files_type(value):
-    return value.split(":")
-
-
-def config_override_type(value):
-    try:
-        section, remainder = value.split("/", 1)
-        key, value = remainder.split("=", 1)
-        return (section.strip(), key.strip(), value.strip())
-    except ValueError:
-        raise argparse.ArgumentTypeError(
-            f"{value} must have the format section/key=value"
-        )
-
-
-class _ParserError(Exception):
-    def __init__(self, message):
-        self.message = message
-
-
-class _HelpError(Exception):
-    pass
-
-
-class _ArgumentParser(argparse.ArgumentParser):
-    def error(self, message):
-        raise _ParserError(message)
-
-
-class _HelpAction(argparse.Action):
-    def __init__(self, option_strings, dest=None, help=None):
-        super().__init__(
-            option_strings=option_strings,
-            dest=dest or argparse.SUPPRESS,
-            default=argparse.SUPPRESS,
-            nargs=0,
-            help=help,
-        )
-
-    def __call__(self, parser, namespace, values, option_string=None):
-        raise _HelpError()
-
-
-class Command:
-
-    """Command parser and runner for building trees of commands.
-
-    This class provides a wraper around :class:`argparse.ArgumentParser`
-    for handling this type of command line application in a better way than
-    argprases own sub-parser handling.
-    """
-
-    help = None
-    #: Help text to display in help output.
-
-    def __init__(self):
-        self._children = collections.OrderedDict()
-        self._arguments = []
-        self._overrides = {}
-
-    def _build(self):
-        actions = []
-        parser = _ArgumentParser(add_help=False)
-        parser.register("action", "help", _HelpAction)
-
-        for args, kwargs in self._arguments:
-            actions.append(parser.add_argument(*args, **kwargs))
-
-        parser.add_argument(
-            "_args", nargs=argparse.REMAINDER, help=argparse.SUPPRESS
-        )
-        return parser, actions
-
-    def add_child(self, name, command):
-        """Add a child parser to consider using.
-
-        :param name: name to use for the sub-command that is being added.
-        :type name: string
-        """
-        self._children[name] = command
-
-    def add_argument(self, *args, **kwargs):
-        """Add an argument to the parser.
-
-        This method takes all the same arguments as the
-        :class:`argparse.ArgumentParser` version of this method.
-        """
-        self._arguments.append((args, kwargs))
-
-    def set(self, **kwargs):
-        """Override a value in the finaly result of parsing."""
-        self._overrides.update(kwargs)
-
-    def exit(self, status_code=0, message=None, usage=None):
-        """Optionally print a message and exit."""
-        print("\n\n".join(m for m in (usage, message) if m))
-        sys.exit(status_code)
-
-    def format_usage(self, prog=None):
-        """Format usage for current parser."""
-        actions = self._build()[1]
-        prog = prog or os.path.basename(sys.argv[0])
-        return self._usage(actions, prog) + "\n"
-
-    def _usage(self, actions, prog):
-        formatter = argparse.HelpFormatter(prog)
-        formatter.add_usage(None, actions, [])
-        return formatter.format_help().strip()
-
-    def format_help(self, prog=None):
-        """Format help for current parser and children."""
-        actions = self._build()[1]
-        prog = prog or os.path.basename(sys.argv[0])
-
-        formatter = argparse.HelpFormatter(prog)
-        formatter.add_usage(None, actions, [])
-
-        if self.help:
-            formatter.add_text(self.help)
-
-        if actions:
-            formatter.add_text("OPTIONS:")
-            formatter.start_section(None)
-            formatter.add_arguments(actions)
-            formatter.end_section()
-
-        subhelp = []
-        for name, child in self._children.items():
-            child._subhelp(name, subhelp)
-
-        if subhelp:
-            formatter.add_text("COMMANDS:")
-            subhelp.insert(0, "")
-
-        return formatter.format_help() + "\n".join(subhelp)
-
-    def _subhelp(self, name, result):
-        actions = self._build()[1]
-
-        if self.help or actions:
-            formatter = argparse.HelpFormatter(name)
-            formatter.add_usage(None, actions, [], "")
-            formatter.start_section(None)
-            formatter.add_text(self.help)
-            formatter.start_section(None)
-            formatter.add_arguments(actions)
-            formatter.end_section()
-            formatter.end_section()
-            result.append(formatter.format_help())
-
-        for childname, child in self._children.items():
-            child._subhelp(" ".join((name, childname)), result)
-
-    def parse(self, args, prog=None):
-        """Parse command line arguments.
-
-        Will recursively parse commands until a final parser is found or an
-        error occurs. In the case of errors we will print a message and exit.
-        Otherwise, any overrides are applied and the current parser stored
-        in the command attribute of the return value.
-
-        :param args: list of arguments to parse
-        :type args: list of strings
-        :param prog: name to use for program
-        :type prog: string
-        :rtype: :class:`argparse.Namespace`
-        """
-        prog = prog or os.path.basename(sys.argv[0])
-        try:
-            return self._parse(
-                args, argparse.Namespace(), self._overrides.copy(), prog
-            )
-        except _HelpError:
-            self.exit(0, self.format_help(prog))
-
-    def _parse(self, args, namespace, overrides, prog):
-        overrides.update(self._overrides)
-        parser, actions = self._build()
-
-        try:
-            result = parser.parse_args(args, namespace)
-        except _ParserError as exc:
-            self.exit(1, str(exc), self._usage(actions, prog))
-
-        if not result._args:
-            for attr, value in overrides.items():
-                setattr(result, attr, value)
-            delattr(result, "_args")
-            result.command = self
-            return result
-
-        child = result._args.pop(0)
-        if child not in self._children:
-            usage = self._usage(actions, prog)
-            self.exit(1, f"unrecognized command: {child}", usage)
-
-        return self._children[child]._parse(
-            result._args, result, overrides, " ".join([prog, child])
-        )
-
-    def run(self, *args, **kwargs):
-        """Run the command.
-
-        Must be implemented by sub-classes that are not simply an intermediate
-        in the command namespace.
-        """
-        raise NotImplementedError
-
-
-@contextlib.contextmanager
-def _actor_error_handling(name):
-    try:
-        yield
-    except exceptions.BackendError as exc:
-        logger.error("Backend (%s) initialization error: %s", name, exc)
-    except exceptions.FrontendError as exc:
-        logger.error("Frontend (%s) initialization error: %s", name, exc)
-    except exceptions.MixerError as exc:
-        logger.error("Mixer (%s) initialization error: %s", name, exc)
-    except Exception:
-        logger.exception("Got un-handled exception from %s", name)
-
-
-# TODO: move out of this utility class
-class RootCommand(Command):
-    def __init__(self):
-        super().__init__()
-        self.set(base_verbosity_level=0)
-        self.add_argument(
-            "-h", "--help", action="help", help="Show this message and exit"
-        )
-        self.add_argument(
-            "--version",
-            action="version",
-            version=f"Mopidy {versioning.get_version()}",
-        )
-        self.add_argument(
-            "-q",
-            "--quiet",
-            action="store_const",
-            const=-1,
-            dest="verbosity_level",
-            help="less output (warning level)",
-        )
-        self.add_argument(
-            "-v",
-            "--verbose",
-            action="count",
-            dest="verbosity_level",
-            default=0,
-            help="more output (repeat up to 4 times for even more)",
-        )
-        self.add_argument(
-            "--config",
-            action="store",
-            dest="config_files",
-            type=config_files_type,
-            default=DEFAULT_CONFIG,
-            metavar="FILES",
-            help="config files to use, colon seperated, later files override",
-        )
-        self.add_argument(
-            "-o",
-            "--option",
-            action="append",
-            dest="config_overrides",
-            type=config_override_type,
-            metavar="OPTIONS",
-            help="`section/key=value` values to override config options",
-        )
-
-    def run(self, args, config):
-        def on_sigterm(loop):
-            logger.info("GLib mainloop got SIGTERM. Exiting...")
-            loop.quit()
-
-        loop = GLib.MainLoop()
-        GLib.unix_signal_add(
-            GLib.PRIORITY_DEFAULT, signal.SIGTERM, on_sigterm, loop
-        )
-
-        mixer_class = self.get_mixer_class(config, args.registry["mixer"])
-        backend_classes = args.registry["backend"]
-        frontend_classes = args.registry["frontend"]
-        core = None
-
-        exit_status_code = 0
-        try:
-            mixer = None
-            if mixer_class is not None:
-                mixer = self.start_mixer(config, mixer_class)
-            if mixer:
-                self.configure_mixer(config, mixer)
-            audio = self.start_audio(config, mixer)
-            backends = self.start_backends(config, backend_classes, audio)
-            core = self.start_core(config, mixer, backends, audio)
-            self.start_frontends(config, frontend_classes, core)
-            logger.info("Starting GLib mainloop")
-            loop.run()
-        except (
-            exceptions.BackendError,
-            exceptions.FrontendError,
-            exceptions.MixerError,
-        ):
-            logger.info("Initialization error. Exiting...")
-            exit_status_code = 1
-        except KeyboardInterrupt:
-            logger.info("Interrupted. Exiting...")
-        except Exception:
-            logger.exception("Uncaught exception")
-        finally:
-            loop.quit()
-            self.stop_frontends(frontend_classes)
-            self.stop_core(core)
-            self.stop_backends(backend_classes)
-            self.stop_audio()
-            if mixer_class is not None:
-                self.stop_mixer(mixer_class)
-            process.stop_remaining_actors()
-            return exit_status_code
-
-    def get_mixer_class(self, config, mixer_classes):
-        logger.debug(
-            "Available Mopidy mixers: %s",
-            ", ".join(m.__name__ for m in mixer_classes) or "none",
-        )
-
-        if config["audio"]["mixer"] == "none":
-            logger.debug("Mixer disabled")
-            return None
-
-        selected_mixers = [
-            m for m in mixer_classes if m.name == config["audio"]["mixer"]
-        ]
-        if len(selected_mixers) != 1:
-            logger.error(
-                'Did not find unique mixer "%s". Alternatives are: %s',
-                config["audio"]["mixer"],
-                ", ".join([m.name for m in mixer_classes]) + ", none" or "none",
-            )
-            process.exit_process()
-        return selected_mixers[0]
-
-    def start_mixer(self, config, mixer_class):
-        logger.info("Starting Mopidy mixer: %s", mixer_class.__name__)
-        with _actor_error_handling(mixer_class.__name__):
-            mixer = mixer_class.start(config=config).proxy()
-            try:
-                mixer.ping().get()
-                return mixer
-            except pykka.ActorDeadError as exc:
-                logger.error("Actor died: %s", exc)
-        return None
-
-    def configure_mixer(self, config, mixer):
-        volume = config["audio"]["mixer_volume"]
-        if volume is not None:
-            mixer.set_volume(volume)
-            logger.info("Mixer volume set to %d", volume)
-        else:
-            logger.debug("Mixer volume left unchanged")
-
-    def start_audio(self, config, mixer):
-        logger.info("Starting Mopidy audio")
-        return Audio.start(config=config, mixer=mixer).proxy()
-
-    def start_backends(self, config, backend_classes, audio):
-        logger.info(
-            "Starting Mopidy backends: %s",
-            ", ".join(b.__name__ for b in backend_classes) or "none",
-        )
-
-        backends = []
-        for backend_class in backend_classes:
-            with _actor_error_handling(backend_class.__name__):
-                with timer.time_logger(backend_class.__name__):
-                    backend = backend_class.start(
-                        config=config, audio=audio
-                    ).proxy()
-                    backends.append(backend)
-
-        # Block until all on_starts have finished, letting them run in parallel
-        for backend in backends[:]:
-            try:
-                backend.ping().get()
-            except pykka.ActorDeadError as exc:
-                backends.remove(backend)
-                logger.error("Actor died: %s", exc)
-
-        return backends
-
-    def start_core(self, config, mixer, backends, audio):
-        logger.info("Starting Mopidy core")
-        core = Core.start(
-            config=config, mixer=mixer, backends=backends, audio=audio
-        ).proxy()
-        core.setup().get()
-        return core
-
-    def start_frontends(self, config, frontend_classes, core):
-        logger.info(
-            "Starting Mopidy frontends: %s",
-            ", ".join(f.__name__ for f in frontend_classes) or "none",
-        )
-
-        for frontend_class in frontend_classes:
-            with _actor_error_handling(frontend_class.__name__):
-                with timer.time_logger(frontend_class.__name__):
-                    frontend_class.start(config=config, core=core)
-
-    def stop_frontends(self, frontend_classes):
-        logger.info("Stopping Mopidy frontends")
-        for frontend_class in frontend_classes:
-            process.stop_actors_by_class(frontend_class)
-
-    def stop_core(self, core):
-        logger.info("Stopping Mopidy core")
-        if core:
-            core.teardown().get()
-        process.stop_actors_by_class(Core)
-
-    def stop_backends(self, backend_classes):
-        logger.info("Stopping Mopidy backends")
-        for backend_class in backend_classes:
-            process.stop_actors_by_class(backend_class)
-
-    def stop_audio(self):
-        logger.info("Stopping Mopidy audio")
-        process.stop_actors_by_class(Audio)
-
-    def stop_mixer(self, mixer_class):
-        logger.info("Stopping Mopidy mixer")
-        process.stop_actors_by_class(mixer_class)
-
-
-class ConfigCommand(Command):
-    help = "Show currently active configuration."
-
-    def __init__(self):
-        super().__init__()
-        self.set(base_verbosity_level=-1)
-
-    def run(self, config, errors, schemas):
-        data = config_lib.format(config, schemas, errors)
-
-        # Throw away all bytes that are not valid UTF-8 before printing
-        data = data.encode(errors="surrogateescape").decode(errors="replace")
-
-        print(data)
-        return 0
-
-
-class DepsCommand(Command):
-    help = "Show dependencies and debug information."
-
-    def __init__(self):
-        super().__init__()
-        self.set(base_verbosity_level=-1)
-
-    def run(self):
-        print(deps.format_dependency_list())
-        return 0
diff --git a/venv/lib/python3.7/site-packages/mopidy/config/__init__.py b/venv/lib/python3.7/site-packages/mopidy/config/__init__.py
deleted file mode 100644
index 8db522c..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/config/__init__.py
+++ /dev/null
@@ -1,321 +0,0 @@
-import configparser
-import itertools
-import logging
-import os
-import pathlib
-import re
-from collections.abc import Mapping
-
-from mopidy.config import keyring
-from mopidy.config.schemas import ConfigSchema, MapConfigSchema
-from mopidy.config.types import (
-    Boolean,
-    ConfigValue,
-    Deprecated,
-    DeprecatedValue,
-    Hostname,
-    Integer,
-    List,
-    LogColor,
-    LogLevel,
-    Path,
-    Port,
-    Secret,
-    String,
-)
-from mopidy.internal import path, versioning
-
-__all__ = [
-    # TODO List everything that is reexported, not just the unused parts.
-    "ConfigValue",
-    "List",
-]
-
-logger = logging.getLogger(__name__)
-
-_core_schema = ConfigSchema("core")
-_core_schema["cache_dir"] = Path()
-_core_schema["config_dir"] = Path()
-_core_schema["data_dir"] = Path()
-# MPD supports at most 10k tracks, some clients segfault when this is exceeded.
-_core_schema["max_tracklist_length"] = Integer(minimum=1)
-_core_schema["restore_state"] = Boolean(optional=True)
-
-_logging_schema = ConfigSchema("logging")
-_logging_schema["verbosity"] = Integer(minimum=-1, maximum=4)
-_logging_schema["format"] = String()
-_logging_schema["color"] = Boolean()
-_logging_schema["console_format"] = Deprecated()
-_logging_schema["debug_format"] = Deprecated()
-_logging_schema["debug_file"] = Deprecated()
-_logging_schema["config_file"] = Path(optional=True)
-
-_loglevels_schema = MapConfigSchema("loglevels", LogLevel())
-_logcolors_schema = MapConfigSchema("logcolors", LogColor())
-
-_audio_schema = ConfigSchema("audio")
-_audio_schema["mixer"] = String()
-_audio_schema["mixer_track"] = Deprecated()
-_audio_schema["mixer_volume"] = Integer(optional=True, minimum=0, maximum=100)
-_audio_schema["output"] = String()
-_audio_schema["visualizer"] = Deprecated()
-_audio_schema["buffer_time"] = Integer(optional=True, minimum=1)
-
-_proxy_schema = ConfigSchema("proxy")
-_proxy_schema["scheme"] = String(
-    optional=True, choices=["http", "https", "socks4", "socks5"]
-)
-_proxy_schema["hostname"] = Hostname(optional=True)
-_proxy_schema["port"] = Port(optional=True)
-_proxy_schema["username"] = String(optional=True)
-_proxy_schema["password"] = Secret(optional=True)
-
-# NOTE: if multiple outputs ever comes something like LogLevelConfigSchema
-# _outputs_schema = config.AudioOutputConfigSchema()
-
-_schemas = [
-    _core_schema,
-    _logging_schema,
-    _loglevels_schema,
-    _logcolors_schema,
-    _audio_schema,
-    _proxy_schema,
-]
-
-_INITIAL_HELP = """
-# For further information about options in this file see:
-#   https://docs.mopidy.com/
-#
-# The initial commented out values reflect the defaults as of:
-#   {versions}
-#
-# Available options and defaults might have changed since then,
-# run `mopidy config` to see the current effective config and
-# `mopidy --version` to check the current version.
-"""
-
-
-def read(config_file):
-    """Helper to load config defaults in same way across core and extensions"""
-    return pathlib.Path(config_file).read_text(errors="surrogateescape")
-
-
-def load(files, ext_schemas, ext_defaults, overrides):
-    config_dir = pathlib.Path(__file__).parent
-    defaults = [read(config_dir / "default.conf")]
-    defaults.extend(ext_defaults)
-    raw_config = _load(files, defaults, keyring.fetch() + (overrides or []))
-
-    schemas = _schemas[:]
-    schemas.extend(ext_schemas)
-    return _validate(raw_config, schemas)
-
-
-def format(config, ext_schemas, comments=None, display=True):
-    schemas = _schemas[:]
-    schemas.extend(ext_schemas)
-    return _format(config, comments or {}, schemas, display, False)
-
-
-def format_initial(extensions_data):
-    config_dir = pathlib.Path(__file__).parent
-    defaults = [read(config_dir / "default.conf")]
-    defaults.extend(d.extension.get_default_config() for d in extensions_data)
-    raw_config = _load([], defaults, [])
-
-    schemas = _schemas[:]
-    schemas.extend(d.extension.get_config_schema() for d in extensions_data)
-
-    config, errors = _validate(raw_config, schemas)
-
-    versions = [f"Mopidy {versioning.get_version()}"]
-    extensions_data = sorted(
-        extensions_data, key=lambda d: d.extension.dist_name
-    )
-    for data in extensions_data:
-        versions.append(f"{data.extension.dist_name} {data.extension.version}")
-
-    header = _INITIAL_HELP.strip().format(versions="\n#   ".join(versions))
-    formatted_config = _format(
-        config=config, comments={}, schemas=schemas, display=False, disable=True
-    )
-    return header + "\n\n" + formatted_config
-
-
-def _load(files, defaults, overrides):
-    parser = configparser.RawConfigParser()
-
-    # TODO: simply return path to config file for defaults so we can load it
-    # all in the same way?
-    logger.info("Loading config from builtin defaults")
-    for default in defaults:
-        if isinstance(default, bytes):
-            default = default.decode()
-        parser.read_string(default)
-
-    # Load config from a series of config files
-    for f in files:
-        f = path.expand_path(f)
-        if f.is_dir():
-            for g in f.iterdir():
-                if g.is_file() and g.suffix == ".conf":
-                    _load_file(parser, g.resolve())
-        else:
-            _load_file(parser, f.resolve())
-
-    raw_config = {}
-    for section in parser.sections():
-        raw_config[section] = dict(parser.items(section))
-
-    logger.info("Loading config from command line options")
-    for section, key, value in overrides:
-        raw_config.setdefault(section, {})[key] = value
-
-    return raw_config
-
-
-def _load_file(parser, file_path):
-    if not file_path.exists():
-        logger.debug(
-            f"Loading config from {file_path.as_uri()} failed; "
-            f"it does not exist"
-        )
-        return
-    if not os.access(str(file_path), os.R_OK):
-        logger.warning(
-            f"Loading config from file_path.as_uri() failed; "
-            f"read permission missing"
-        )
-        return
-
-    try:
-        logger.info(f"Loading config from {file_path.as_uri()}")
-        with file_path.open("r") as fh:
-            parser.read_file(fh)
-    except configparser.MissingSectionHeaderError:
-        logger.warning(
-            f"Loading config from {file_path.as_uri()} failed; "
-            f"it does not have a config section"
-        )
-    except configparser.ParsingError as e:
-        linenos = ", ".join(str(lineno) for lineno, line in e.errors)
-        logger.warning(
-            f"Config file {file_path.as_uri()} has errors; "
-            f"line {linenos} has been ignored"
-        )
-    except OSError:
-        # TODO: if this is the initial load of logging config we might not
-        # have a logger at this point, we might want to handle this better.
-        logger.debug(f"Config file {file_path.as_uri()} not found; skipping")
-
-
-def _validate(raw_config, schemas):
-    # Get validated config
-    config = {}
-    errors = {}
-    sections = set(raw_config)
-    for schema in schemas:
-        sections.discard(schema.name)
-        values = raw_config.get(schema.name, {})
-        result, error = schema.deserialize(values)
-        if error:
-            errors[schema.name] = error
-        if result:
-            config[schema.name] = result
-
-    for section in sections:
-        logger.debug(f"Ignoring unknown config section: {section}")
-
-    return config, errors
-
-
-def _format(config, comments, schemas, display, disable):
-    output = []
-    for schema in schemas:
-        serialized = schema.serialize(
-            config.get(schema.name, {}), display=display
-        )
-        if not serialized:
-            continue
-        output.append(f"[{schema.name}]")
-        for key, value in serialized.items():
-            if isinstance(value, DeprecatedValue):
-                continue
-            comment = comments.get(schema.name, {}).get(key, "")
-            output.append(f"{key} =")
-            if value is not None:
-                output[-1] += " " + value
-            if comment:
-                output[-1] += "  ; " + comment.capitalize()
-            if disable:
-                output[-1] = re.sub(r"^", "#", output[-1], flags=re.M)
-        output.append("")
-    return "\n".join(output).strip()
-
-
-def _preprocess(config_string):
-    """Convert a raw config into a form that preserves comments etc."""
-    results = ["[__COMMENTS__]"]
-    counter = itertools.count(0)
-
-    section_re = re.compile(r"^(\[[^\]]+\])\s*(.+)$")
-    blank_line_re = re.compile(r"^\s*$")
-    comment_re = re.compile(r"^(#|;)")
-    inline_comment_re = re.compile(r" ;")
-
-    def newlines(match):
-        return f"__BLANK{next(counter):d}__ ="
-
-    def comments(match):
-        if match.group(1) == "#":
-            return f"__HASH{next(counter):d}__ ="
-        elif match.group(1) == ";":
-            return f"__SEMICOLON{next(counter):d}__ ="
-
-    def inlinecomments(match):
-        return f"\n__INLINE{next(counter):d}__ ="
-
-    def sections(match):
-        return (
-            f"{match.group(1)}\n__SECTION{next(counter):d}__ = {match.group(2)}"
-        )
-
-    for line in config_string.splitlines():
-        line = blank_line_re.sub(newlines, line)
-        line = section_re.sub(sections, line)
-        line = comment_re.sub(comments, line)
-        line = inline_comment_re.sub(inlinecomments, line)
-        results.append(line)
-    return "\n".join(results)
-
-
-def _postprocess(config_string):
-    """Converts a preprocessed config back to original form."""
-    flags = re.IGNORECASE | re.MULTILINE
-    result = re.sub(r"^\[__COMMENTS__\](\n|$)", "", config_string, flags=flags)
-    result = re.sub(r"\n__INLINE\d+__ =(.*)$", r" ;\g<1>", result, flags=flags)
-    result = re.sub(r"^__HASH\d+__ =(.*)$", r"#\g<1>", result, flags=flags)
-    result = re.sub(r"^__SEMICOLON\d+__ =(.*)$", r";\g<1>", result, flags=flags)
-    result = re.sub(r"\n__SECTION\d+__ =(.*)$", r"\g<1>", result, flags=flags)
-    result = re.sub(r"^__BLANK\d+__ =$", "", result, flags=flags)
-    return result
-
-
-class Proxy(Mapping):
-    def __init__(self, data):
-        self._data = data
-
-    def __getitem__(self, key):
-        item = self._data.__getitem__(key)
-        if isinstance(item, dict):
-            return Proxy(item)
-        return item
-
-    def __iter__(self):
-        return self._data.__iter__()
-
-    def __len__(self):
-        return self._data.__len__()
-
-    def __repr__(self):
-        return f"Proxy({self._data!r})"
diff --git a/venv/lib/python3.7/site-packages/mopidy/config/default.conf b/venv/lib/python3.7/site-packages/mopidy/config/default.conf
deleted file mode 100644
index 643638f..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/config/default.conf
+++ /dev/null
@@ -1,25 +0,0 @@
-[core]
-cache_dir = $XDG_CACHE_DIR/mopidy
-config_dir = $XDG_CONFIG_DIR/mopidy
-data_dir = $XDG_DATA_DIR/mopidy
-max_tracklist_length = 10000
-restore_state = false
-
-[logging]
-verbosity = 0
-format = %(levelname)-8s %(asctime)s [%(process)d:%(threadName)s] %(name)s\n  %(message)s
-color = true
-config_file =
-
-[audio]
-mixer = software
-mixer_volume =
-output = autoaudiosink
-buffer_time =
-
-[proxy]
-scheme =
-hostname =
-port =
-username =
-password =
diff --git a/venv/lib/python3.7/site-packages/mopidy/config/keyring.py b/venv/lib/python3.7/site-packages/mopidy/config/keyring.py
deleted file mode 100644
index bb0a1a3..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/config/keyring.py
+++ /dev/null
@@ -1,177 +0,0 @@
-import logging
-
-logger = logging.getLogger(__name__)
-
-try:
-    import dbus
-except ImportError:
-    dbus = None
-
-
-# XXX: Hack to workaround introspection bug caused by gnome-keyring, should be
-# fixed by version 3.5 per:
-# https://git.gnome.org/browse/gnome-keyring/commit/?id=5dccbe88eb94eea9934e2b7
-if dbus:
-    EMPTY_STRING = dbus.String("", variant_level=1)
-else:
-    EMPTY_STRING = ""
-
-
-FETCH_ERROR = (
-    "Fetching passwords from your keyring failed. Any passwords "
-    "stored in the keyring will not be available."
-)
-
-
-def fetch():
-    if not dbus:
-        logger.debug("%s (dbus not installed)", FETCH_ERROR)
-        return []
-
-    try:
-        bus = dbus.SessionBus()
-    except dbus.exceptions.DBusException as e:
-        logger.debug("%s (%s)", FETCH_ERROR, e)
-        return []
-
-    if not bus.name_has_owner("org.freedesktop.secrets"):
-        logger.debug(
-            "%s (org.freedesktop.secrets service not running)", FETCH_ERROR
-        )
-        return []
-
-    service = _service(bus)
-    session = service.OpenSession("plain", EMPTY_STRING)[1]
-    items, locked = service.SearchItems({"service": "mopidy"})
-
-    if not locked and not items:
-        return []
-
-    if locked:
-        # There is a chance we can unlock without prompting the users...
-        items, prompt = service.Unlock(locked)
-        if prompt != "/":
-            _prompt(bus, prompt).Dismiss()
-            logger.debug("%s (Keyring is locked)", FETCH_ERROR)
-            return []
-
-    result = []
-    secrets = service.GetSecrets(items, session, byte_arrays=True)
-    for item_path, values in secrets.items():
-        session_path, parameters, value, content_type = values
-        attrs = _item_attributes(bus, item_path)
-        result.append((attrs["section"], attrs["key"], bytes(value)))
-    return result
-
-
-def set(section, key, value):
-    """Store a secret config value for a given section/key.
-
-    Indicates if storage failed or succeeded.
-    """
-    if not dbus:
-        logger.debug(
-            "Saving %s/%s to keyring failed. (dbus not installed)", section, key
-        )
-        return False
-
-    try:
-        bus = dbus.SessionBus()
-    except dbus.exceptions.DBusException as e:
-        logger.debug("Saving %s/%s to keyring failed. (%s)", section, key, e)
-        return False
-
-    if not bus.name_has_owner("org.freedesktop.secrets"):
-        logger.debug(
-            "Saving %s/%s to keyring failed. "
-            "(org.freedesktop.secrets service not running)",
-            section,
-            key,
-        )
-        return False
-
-    service = _service(bus)
-    collection = _collection(bus)
-    if not collection:
-        return False
-
-    if isinstance(value, str):
-        value = value.encode()
-
-    session = service.OpenSession("plain", EMPTY_STRING)[1]
-    secret = dbus.Struct(
-        (session, "", dbus.ByteArray(value), "plain/text; charset=utf8")
-    )
-    label = f"mopidy: {section}/{key}"
-    attributes = {"service": "mopidy", "section": section, "key": key}
-    properties = {
-        "org.freedesktop.Secret.Item.Label": label,
-        "org.freedesktop.Secret.Item.Attributes": attributes,
-    }
-
-    try:
-        item, prompt = collection.CreateItem(properties, secret, True)
-    except dbus.exceptions.DBusException as e:
-        # TODO: catch IsLocked errors etc.
-        logger.debug("Saving %s/%s to keyring failed. (%s)", section, key, e)
-        return False
-
-    if prompt == "/":
-        return True
-
-    _prompt(bus, prompt).Dismiss()
-    logger.debug(
-        "Saving secret %s/%s failed. (Keyring is locked)", section, key
-    )
-    return False
-
-
-def _service(bus):
-    return _interface(
-        bus, "/org/freedesktop/secrets", "org.freedesktop.Secret.Service"
-    )
-
-
-# NOTE: depending on versions and setup 'default' might not exists, so try and
-# use it but fall back to the 'login' collection, and finally the 'session' one
-# if all else fails. We should probably create a keyring/collection setting
-# that allows users to set this so they have control over where their secrets
-# get stored.
-def _collection(bus):
-    for name in "aliases/default", "collection/login", "collection/session":
-        path = "/org/freedesktop/secrets/" + name
-        if _collection_exists(bus, path):
-            break
-    else:
-        return None
-    return _interface(bus, path, "org.freedesktop.Secret.Collection")
-
-
-# NOTE: Hack to probe if a given collection actually exists. Needed to work
-# around an introspection bug in setting passwords for non-existant aliases.
-def _collection_exists(bus, path):
-    try:
-        item = _interface(bus, path, "org.freedesktop.DBus.Properties")
-        item.Get("org.freedesktop.Secret.Collection", "Label")
-        return True
-    except dbus.exceptions.DBusException:
-        return False
-
-
-# NOTE: We could call prompt.Prompt('') to unlock the keyring when it is not
-# '/', but we would then also have to arrange to setup signals to wait until
-# this has been completed. So for now we just dismiss the prompt and expect
-# keyrings to be unlocked.
-def _prompt(bus, path):
-    return _interface(bus, path, "Prompt")
-
-
-def _item_attributes(bus, path):
-    item = _interface(bus, path, "org.freedesktop.DBus.Properties")
-    result = item.Get("org.freedesktop.Secret.Item", "Attributes")
-    return {bytes(k): bytes(v) for k, v in result.items()}
-
-
-def _interface(bus, path, interface):
-    obj = bus.get_object("org.freedesktop.secrets", path)
-    return dbus.Interface(obj, interface)
diff --git a/venv/lib/python3.7/site-packages/mopidy/config/schemas.py b/venv/lib/python3.7/site-packages/mopidy/config/schemas.py
deleted file mode 100644
index df16588..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/config/schemas.py
+++ /dev/null
@@ -1,125 +0,0 @@
-import collections
-
-from mopidy.config import types
-
-
-def _did_you_mean(name, choices):
-    """Suggest most likely setting based on levenshtein."""
-    if not choices:
-        return None
-
-    name = name.lower()
-    candidates = [(_levenshtein(name, c), c) for c in choices]
-    candidates.sort()
-
-    if candidates[0][0] <= 3:
-        return candidates[0][1]
-    return None
-
-
-def _levenshtein(a, b):
-    """Calculates the Levenshtein distance between a and b."""
-    n, m = len(a), len(b)
-    if n > m:
-        return _levenshtein(b, a)
-
-    current = range(n + 1)
-    for i in range(1, m + 1):
-        previous, current = current, [i] + [0] * n
-        for j in range(1, n + 1):
-            add, delete = previous[j] + 1, current[j - 1] + 1
-            change = previous[j - 1]
-            if a[j - 1] != b[i - 1]:
-                change += 1
-            current[j] = min(add, delete, change)
-    return current[n]
-
-
-class ConfigSchema(collections.OrderedDict):
-
-    """Logical group of config values that correspond to a config section.
-
-    Schemas are set up by assigning config keys with config values to
-    instances. Once setup :meth:`deserialize` can be called with a dict of
-    values to process. For convienience we also support :meth:`format` method
-    that can used for converting the values to a dict that can be printed and
-    :meth:`serialize` for converting the values to a form suitable for
-    persistence.
-    """
-
-    def __init__(self, name):
-        super().__init__()
-        self.name = name
-
-    def deserialize(self, values):
-        """Validates the given ``values`` using the config schema.
-
-        Returns a tuple with cleaned values and errors.
-        """
-        errors = {}
-        result = {}
-
-        for key, value in values.items():
-            try:
-                result[key] = self[key].deserialize(value)
-            except KeyError:  # not in our schema
-                errors[key] = "unknown config key."
-                suggestion = _did_you_mean(key, self.keys())
-                if suggestion:
-                    errors[key] += f" Did you mean {suggestion!r}?"
-            except ValueError as e:  # deserialization failed
-                result[key] = None
-                errors[key] = str(e)
-
-        for key in self.keys():
-            if isinstance(self[key], types.Deprecated):
-                result.pop(key, None)
-            elif key not in result and key not in errors:
-                result[key] = None
-                errors[key] = "config key not found."
-
-        return result, errors
-
-    def serialize(self, values, display=False):
-        """Converts the given ``values`` to a format suitable for persistence.
-
-        If ``display`` is :class:`True` secret config values, like passwords,
-        will be masked out.
-
-        Returns a dict of config keys and values."""
-        result = collections.OrderedDict()
-        for key in self.keys():
-            if key in values:
-                result[key] = self[key].serialize(values[key], display)
-        return result
-
-
-class MapConfigSchema:
-
-    """Schema for handling multiple unknown keys with the same type.
-
-    Does not sub-class :class:`ConfigSchema`, but implements the same
-    serialize/deserialize interface.
-    """
-
-    def __init__(self, name, value_type):
-        self.name = name
-        self._value_type = value_type
-
-    def deserialize(self, values):
-        errors = {}
-        result = {}
-
-        for key, value in values.items():
-            try:
-                result[key] = self._value_type.deserialize(value)
-            except ValueError as e:  # deserialization failed
-                result[key] = None
-                errors[key] = str(e)
-        return result, errors
-
-    def serialize(self, values, display=False):
-        result = collections.OrderedDict()
-        for key in sorted(values.keys()):
-            result[key] = self._value_type.serialize(values[key], display)
-        return result
diff --git a/venv/lib/python3.7/site-packages/mopidy/config/types.py b/venv/lib/python3.7/site-packages/mopidy/config/types.py
deleted file mode 100644
index f9ffec5..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/config/types.py
+++ /dev/null
@@ -1,323 +0,0 @@
-import logging
-import re
-import socket
-
-from mopidy.config import validators
-from mopidy.internal import log, path
-
-
-def decode(value):
-    if isinstance(value, bytes):
-        value = value.decode(errors="surrogateescape")
-
-    for char in ("\\", "\n", "\t"):
-        value = value.replace(
-            char.encode(encoding="unicode-escape").decode(), char
-        )
-
-    return value
-
-
-def encode(value):
-    if isinstance(value, bytes):
-        value = value.decode(errors="surrogateescape")
-
-    for char in ("\\", "\n", "\t"):
-        value = value.replace(
-            char, char.encode(encoding="unicode-escape").decode()
-        )
-
-    return value
-
-
-class DeprecatedValue:
-    pass
-
-
-class ConfigValue:
-    """Represents a config key's value and how to handle it.
-
-    Normally you will only be interacting with sub-classes for config values
-    that encode either deserialization behavior and/or validation.
-
-    Each config value should be used for the following actions:
-
-    1. Deserializing from a raw string and validating, raising ValueError on
-       failure.
-    2. Serializing a value back to a string that can be stored in a config.
-    3. Formatting a value to a printable form (useful for masking secrets).
-
-    :class:`None` values should not be deserialized, serialized or formatted,
-    the code interacting with the config should simply skip None config values.
-    """
-
-    def deserialize(self, value):
-        """Cast raw string to appropriate type."""
-        return decode(value)
-
-    def serialize(self, value, display=False):
-        """Convert value back to string for saving."""
-        if value is None:
-            return ""
-        return str(value)
-
-
-class Deprecated(ConfigValue):
-    """Deprecated value.
-
-    Used for ignoring old config values that are no longer in use, but should
-    not cause the config parser to crash.
-    """
-
-    def deserialize(self, value):
-        return DeprecatedValue()
-
-    def serialize(self, value, display=False):
-        return DeprecatedValue()
-
-
-class String(ConfigValue):
-    """String value.
-
-    Is decoded as utf-8 and \\n \\t escapes should work and be preserved.
-    """
-
-    def __init__(self, optional=False, choices=None):
-        self._required = not optional
-        self._choices = choices
-
-    def deserialize(self, value):
-        value = decode(value).strip()
-        validators.validate_required(value, self._required)
-        if not value:
-            return None
-        validators.validate_choice(value, self._choices)
-        return value
-
-    def serialize(self, value, display=False):
-        if value is None:
-            return ""
-        return encode(value)
-
-
-class Secret(String):
-    """Secret string value.
-
-    Is decoded as utf-8 and \\n \\t escapes should work and be preserved.
-
-    Should be used for passwords, auth tokens etc. Will mask value when being
-    displayed.
-    """
-
-    def __init__(self, optional=False, choices=None):
-        self._required = not optional
-        self._choices = None  # Choices doesn't make sense for secrets
-
-    def serialize(self, value, display=False):
-        if value is not None and display:
-            return "********"
-        return super().serialize(value, display)
-
-
-class Integer(ConfigValue):
-    """Integer value."""
-
-    def __init__(
-        self, minimum=None, maximum=None, choices=None, optional=False
-    ):
-        self._required = not optional
-        self._minimum = minimum
-        self._maximum = maximum
-        self._choices = choices
-
-    def deserialize(self, value):
-        value = decode(value)
-        validators.validate_required(value, self._required)
-        if not value:
-            return None
-        value = int(value)
-        validators.validate_choice(value, self._choices)
-        validators.validate_minimum(value, self._minimum)
-        validators.validate_maximum(value, self._maximum)
-        return value
-
-
-class Boolean(ConfigValue):
-    """Boolean value.
-
-    Accepts ``1``, ``yes``, ``true``, and ``on`` with any casing as
-    :class:`True`.
-
-    Accepts ``0``, ``no``, ``false``, and ``off`` with any casing as
-    :class:`False`.
-    """
-
-    true_values = ("1", "yes", "true", "on")
-    false_values = ("0", "no", "false", "off")
-
-    def __init__(self, optional=False):
-        self._required = not optional
-
-    def deserialize(self, value):
-        value = decode(value)
-        validators.validate_required(value, self._required)
-        if not value:
-            return None
-        if value.lower() in self.true_values:
-            return True
-        elif value.lower() in self.false_values:
-            return False
-        raise ValueError(f"invalid value for boolean: {value!r}")
-
-    def serialize(self, value, display=False):
-        if value is True:
-            return "true"
-        elif value in (False, None):
-            return "false"
-        else:
-            raise ValueError(f"{value!r} is not a boolean")
-
-
-class List(ConfigValue):
-    """List value.
-
-    Supports elements split by commas or newlines. Newlines take presedence and
-    empty list items will be filtered out.
-    """
-
-    def __init__(self, optional=False):
-        self._required = not optional
-
-    def deserialize(self, value):
-        value = decode(value)
-        if "\n" in value:
-            values = re.split(r"\s*\n\s*", value)
-        else:
-            values = re.split(r"\s*,\s*", value)
-        values = tuple(v.strip() for v in values if v.strip())
-        validators.validate_required(values, self._required)
-        return tuple(values)
-
-    def serialize(self, value, display=False):
-        if not value:
-            return ""
-        return "\n  " + "\n  ".join(encode(v) for v in value if v)
-
-
-class LogColor(ConfigValue):
-    def deserialize(self, value):
-        value = decode(value)
-        validators.validate_choice(value.lower(), log.COLORS)
-        return value.lower()
-
-    def serialize(self, value, display=False):
-        if value.lower() in log.COLORS:
-            return encode(value.lower())
-        return ""
-
-
-class LogLevel(ConfigValue):
-    """Log level value.
-
-    Expects one of ``critical``, ``error``, ``warning``, ``info``, ``debug``,
-    or ``all``, with any casing.
-    """
-
-    levels = {
-        "critical": logging.CRITICAL,
-        "error": logging.ERROR,
-        "warning": logging.WARNING,
-        "info": logging.INFO,
-        "debug": logging.DEBUG,
-        "trace": log.TRACE_LOG_LEVEL,
-        "all": logging.NOTSET,
-    }
-
-    def deserialize(self, value):
-        value = decode(value)
-        validators.validate_choice(value.lower(), self.levels.keys())
-        return self.levels.get(value.lower())
-
-    def serialize(self, value, display=False):
-        lookup = {v: k for k, v in self.levels.items()}
-        if value in lookup:
-            return encode(lookup[value])
-        return ""
-
-
-class Hostname(ConfigValue):
-    """Network hostname value."""
-
-    def __init__(self, optional=False):
-        self._required = not optional
-
-    def deserialize(self, value, display=False):
-        value = decode(value).strip()
-        validators.validate_required(value, self._required)
-        if not value:
-            return None
-
-        socket_path = path.get_unix_socket_path(value)
-        if socket_path is not None:
-            path_str = Path(not self._required).deserialize(socket_path)
-            return f"unix:{path_str}"
-
-        try:
-            socket.getaddrinfo(value, None)
-        except OSError:
-            raise ValueError("must be a resolveable hostname or valid IP")
-
-        return value
-
-
-class Port(Integer):
-    """Network port value.
-
-    Expects integer in the range 0-65535, zero tells the kernel to simply
-    allocate a port for us.
-    """
-
-    def __init__(self, choices=None, optional=False):
-        super().__init__(
-            minimum=0, maximum=2 ** 16 - 1, choices=choices, optional=optional
-        )
-
-
-class _ExpandedPath(str):
-    def __new__(cls, original, expanded):
-        return super().__new__(cls, expanded)
-
-    def __init__(self, original, expanded):
-        self.original = original
-
-
-class Path(ConfigValue):
-    """File system path.
-
-    The following expansions of the path will be done:
-
-    - ``~`` to the current user's home directory
-    - ``$XDG_CACHE_DIR`` according to the XDG spec
-    - ``$XDG_CONFIG_DIR`` according to the XDG spec
-    - ``$XDG_DATA_DIR`` according to the XDG spec
-    - ``$XDG_MUSIC_DIR`` according to the XDG spec
-    """
-
-    def __init__(self, optional=False):
-        self._required = not optional
-
-    def deserialize(self, value):
-        value = decode(value).strip()
-        expanded = path.expand_path(value)
-        validators.validate_required(value, self._required)
-        validators.validate_required(expanded, self._required)
-        if not value or expanded is None:
-            return None
-        return _ExpandedPath(value, expanded)
-
-    def serialize(self, value, display=False):
-        if isinstance(value, _ExpandedPath):
-            value = value.original
-        if isinstance(value, bytes):
-            value = value.decode(errors="surrogateescape")
-        return value
diff --git a/venv/lib/python3.7/site-packages/mopidy/config/validators.py b/venv/lib/python3.7/site-packages/mopidy/config/validators.py
deleted file mode 100644
index 6f69cb5..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/config/validators.py
+++ /dev/null
@@ -1,39 +0,0 @@
-# TODO: add validate regexp?
-
-
-def validate_required(value, required):
-    """Validate that ``value`` is set if ``required``
-
-    Normally called in :meth:`~mopidy.config.types.ConfigValue.deserialize` on
-    the raw string, _not_ the converted value.
-    """
-    if required and not value:
-        raise ValueError("must be set.")
-
-
-def validate_choice(value, choices):
-    """Validate that ``value`` is one of the ``choices``
-
-    Normally called in :meth:`~mopidy.config.types.ConfigValue.deserialize`.
-    """
-    if choices is not None and value not in choices:
-        names = ", ".join(repr(c) for c in choices)
-        raise ValueError(f"must be one of {names}, not {value}.")
-
-
-def validate_minimum(value, minimum):
-    """Validate that ``value`` is at least ``minimum``
-
-    Normally called in :meth:`~mopidy.config.types.ConfigValue.deserialize`.
-    """
-    if minimum is not None and value < minimum:
-        raise ValueError(f"{value!r} must be larger than {minimum!r}.")
-
-
-def validate_maximum(value, maximum):
-    """Validate that ``value`` is at most ``maximum``
-
-    Normally called in :meth:`~mopidy.config.types.ConfigValue.deserialize`.
-    """
-    if maximum is not None and value > maximum:
-        raise ValueError(f"{value!r} must be smaller than {maximum!r}.")
diff --git a/venv/lib/python3.7/site-packages/mopidy/core/__init__.py b/venv/lib/python3.7/site-packages/mopidy/core/__init__.py
deleted file mode 100644
index 4e73d17..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/core/__init__.py
+++ /dev/null
@@ -1,9 +0,0 @@
-# flake8: noqa
-from .actor import Core
-from .history import HistoryController
-from .library import LibraryController
-from .listener import CoreListener
-from .mixer import MixerController
-from .playback import PlaybackController, PlaybackState
-from .playlists import PlaylistsController
-from .tracklist import TracklistController
diff --git a/venv/lib/python3.7/site-packages/mopidy/core/actor.py b/venv/lib/python3.7/site-packages/mopidy/core/actor.py
deleted file mode 100644
index a8b07fc..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/core/actor.py
+++ /dev/null
@@ -1,276 +0,0 @@
-import collections
-import itertools
-import logging
-
-import pykka
-
-import mopidy
-from mopidy import audio, backend, mixer
-from mopidy.audio import PlaybackState
-from mopidy.core.history import HistoryController
-from mopidy.core.library import LibraryController
-from mopidy.core.listener import CoreListener
-from mopidy.core.mixer import MixerController
-from mopidy.core.playback import PlaybackController
-from mopidy.core.playlists import PlaylistsController
-from mopidy.core.tracklist import TracklistController
-from mopidy.internal import path, storage, validation, versioning
-from mopidy.internal.models import CoreState
-
-logger = logging.getLogger(__name__)
-
-
-class Core(
-    pykka.ThreadingActor,
-    audio.AudioListener,
-    backend.BackendListener,
-    mixer.MixerListener,
-):
-
-    library = None
-    """An instance of :class:`~mopidy.core.LibraryController`"""
-
-    history = None
-    """An instance of :class:`~mopidy.core.HistoryController`"""
-
-    mixer = None
-    """An instance of :class:`~mopidy.core.MixerController`"""
-
-    playback = None
-    """An instance of :class:`~mopidy.core.PlaybackController`"""
-
-    playlists = None
-    """An instance of :class:`~mopidy.core.PlaylistsController`"""
-
-    tracklist = None
-    """An instance of :class:`~mopidy.core.TracklistController`"""
-
-    def __init__(self, config=None, mixer=None, backends=None, audio=None):
-        super().__init__()
-
-        self._config = config
-
-        self.backends = Backends(backends)
-
-        self.library = pykka.traversable(
-            LibraryController(backends=self.backends, core=self)
-        )
-        self.history = pykka.traversable(HistoryController())
-        self.mixer = pykka.traversable(MixerController(mixer=mixer))
-        self.playback = pykka.traversable(
-            PlaybackController(audio=audio, backends=self.backends, core=self)
-        )
-        self.playlists = pykka.traversable(
-            PlaylistsController(backends=self.backends, core=self)
-        )
-        self.tracklist = pykka.traversable(TracklistController(core=self))
-
-        self.audio = audio
-
-    def get_uri_schemes(self):
-        """Get list of URI schemes we can handle"""
-        futures = [b.uri_schemes for b in self.backends]
-        results = pykka.get_all(futures)
-        uri_schemes = itertools.chain(*results)
-        return sorted(uri_schemes)
-
-    def get_version(self):
-        """Get version of the Mopidy core API"""
-        return versioning.get_version()
-
-    def reached_end_of_stream(self):
-        self.playback._on_end_of_stream()
-
-    def stream_changed(self, uri):
-        self.playback._on_stream_changed(uri)
-
-    def position_changed(self, position):
-        self.playback._on_position_changed(position)
-
-    def state_changed(self, old_state, new_state, target_state):
-        # XXX: This is a temporary fix for issue #232 while we wait for a more
-        # permanent solution with the implementation of issue #234. When the
-        # Spotify play token is lost, the Spotify backend pauses audio
-        # playback, but mopidy.core doesn't know this, so we need to update
-        # mopidy.core's state to match the actual state in mopidy.audio. If we
-        # don't do this, clients will think that we're still playing.
-
-        # We ignore cases when target state is set as this is buffering
-        # updates (at least for now) and we need to get #234 fixed...
-        if (
-            new_state == PlaybackState.PAUSED
-            and not target_state
-            and self.playback.get_state() != PlaybackState.PAUSED
-        ):
-            self.playback.set_state(new_state)
-            self.playback._trigger_track_playback_paused()
-
-    def playlists_loaded(self):
-        # Forward event from backend to frontends
-        CoreListener.send("playlists_loaded")
-
-    def volume_changed(self, volume):
-        # Forward event from mixer to frontends
-        CoreListener.send("volume_changed", volume=volume)
-
-    def mute_changed(self, mute):
-        # Forward event from mixer to frontends
-        CoreListener.send("mute_changed", mute=mute)
-
-    def tags_changed(self, tags):
-        if not self.audio or "title" not in tags:
-            return
-
-        tags = self.audio.get_current_tags().get()
-        if not tags:
-            return
-
-        # TODO: this is a hack to make sure we don't emit stream title changes
-        # for plain tracks. We need a better way to decide if something is a
-        # stream.
-        if "title" in tags and tags["title"]:
-            title = tags["title"][0]
-            current_track = self.playback.get_current_track()
-            if current_track is not None and current_track.name != title:
-                self.playback._stream_title = title
-                CoreListener.send("stream_title_changed", title=title)
-
-    def setup(self):
-        """Do not call this function. It is for internal use at startup."""
-        try:
-            coverage = []
-            if self._config and "restore_state" in self._config["core"]:
-                if self._config["core"]["restore_state"]:
-                    coverage = [
-                        "tracklist",
-                        "mode",
-                        "play-last",
-                        "mixer",
-                        "history",
-                    ]
-            if len(coverage):
-                self._load_state(coverage)
-        except Exception as e:
-            logger.warn("Restore state: Unexpected error: %s", str(e))
-
-    def teardown(self):
-        """Do not call this function. It is for internal use at shutdown."""
-        try:
-            if self._config and "restore_state" in self._config["core"]:
-                if self._config["core"]["restore_state"]:
-                    self._save_state()
-        except Exception as e:
-            logger.warn("Unexpected error while saving state: %s", str(e))
-
-    def _get_data_dir(self):
-        # get or create data director for core
-        data_dir_path = (
-            path.expand_path(self._config["core"]["data_dir"]) / "core"
-        )
-        path.get_or_create_dir(data_dir_path)
-        return data_dir_path
-
-    def _get_state_file(self):
-        return self._get_data_dir() / "state.json.gz"
-
-    def _save_state(self):
-        """
-        Save current state to disk.
-        """
-
-        state_file = self._get_state_file()
-        logger.info("Saving state to %s", state_file)
-
-        data = {}
-        data["version"] = mopidy.__version__
-        data["state"] = CoreState(
-            tracklist=self.tracklist._save_state(),
-            history=self.history._save_state(),
-            playback=self.playback._save_state(),
-            mixer=self.mixer._save_state(),
-        )
-        storage.dump(state_file, data)
-        logger.debug("Saving state done")
-
-    def _load_state(self, coverage):
-        """
-        Restore state from disk.
-
-        Load state from disk and restore it. Parameter ``coverage``
-        limits the amount of data to restore. Possible
-        values for ``coverage`` (list of one or more of):
-
-            - 'tracklist' fill the tracklist
-            - 'mode' set tracklist properties (consume, random, repeat, single)
-            - 'play-last' restore play state ('tracklist' also required)
-            - 'mixer' set mixer volume and mute state
-            - 'history' restore history
-
-        :param coverage: amount of data to restore
-        :type coverage: list of strings
-        """
-
-        state_file = self._get_state_file()
-        logger.info("Loading state from %s", state_file)
-
-        data = storage.load(state_file)
-
-        try:
-            # Try only once. If something goes wrong, the next start is clean.
-            state_file.unlink()
-        except OSError:
-            logger.info("Failed to delete %s", state_file)
-
-        if "state" in data:
-            core_state = data["state"]
-            validation.check_instance(core_state, CoreState)
-            self.history._load_state(core_state.history, coverage)
-            self.tracklist._load_state(core_state.tracklist, coverage)
-            self.mixer._load_state(core_state.mixer, coverage)
-            # playback after tracklist
-            self.playback._load_state(core_state.playback, coverage)
-        logger.debug("Loading state done")
-
-
-class Backends(list):
-    def __init__(self, backends):
-        super().__init__(backends)
-
-        self.with_library = collections.OrderedDict()
-        self.with_library_browse = collections.OrderedDict()
-        self.with_playback = collections.OrderedDict()
-        self.with_playlists = collections.OrderedDict()
-
-        backends_by_scheme = {}
-
-        def name(b):
-            return b.actor_ref.actor_class.__name__
-
-        for b in backends:
-            try:
-                has_library = b.has_library().get()
-                has_library_browse = b.has_library_browse().get()
-                has_playback = b.has_playback().get()
-                has_playlists = b.has_playlists().get()
-            except Exception:
-                self.remove(b)
-                logger.exception(
-                    "Fetching backend info for %s failed",
-                    b.actor_ref.actor_class.__name__,
-                )
-
-            for scheme in b.uri_schemes.get():
-                assert scheme not in backends_by_scheme, (
-                    f"Cannot add URI scheme {scheme!r} for {name(b)}, "
-                    f"it is already handled by {name(backends_by_scheme[scheme])}"
-                )
-                backends_by_scheme[scheme] = b
-
-                if has_library:
-                    self.with_library[scheme] = b
-                if has_library_browse:
-                    self.with_library_browse[scheme] = b
-                if has_playback:
-                    self.with_playback[scheme] = b
-                if has_playlists:
-                    self.with_playlists[scheme] = b
diff --git a/venv/lib/python3.7/site-packages/mopidy/core/history.py b/venv/lib/python3.7/site-packages/mopidy/core/history.py
deleted file mode 100644
index b7e9619..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/core/history.py
+++ /dev/null
@@ -1,73 +0,0 @@
-import copy
-import logging
-import time
-
-from mopidy import models
-from mopidy.internal.models import HistoryState, HistoryTrack
-
-logger = logging.getLogger(__name__)
-
-
-class HistoryController:
-    def __init__(self):
-        self._history = []
-
-    def _add_track(self, track):
-        """Add track to the playback history.
-
-        Internal method for :class:`mopidy.core.PlaybackController`.
-
-        :param track: track to add
-        :type track: :class:`mopidy.models.Track`
-        """
-        if not isinstance(track, models.Track):
-            raise TypeError("Only Track objects can be added to the history")
-
-        timestamp = int(time.time() * 1000)
-
-        name_parts = []
-        if track.artists:
-            name_parts.append(
-                ", ".join([artist.name for artist in track.artists])
-            )
-        if track.name is not None:
-            name_parts.append(track.name)
-        name = " - ".join(name_parts)
-        ref = models.Ref.track(uri=track.uri, name=name)
-
-        self._history.insert(0, (timestamp, ref))
-
-    def get_length(self):
-        """Get the number of tracks in the history.
-
-        :returns: the history length
-        :rtype: int
-        """
-        return len(self._history)
-
-    def get_history(self):
-        """Get the track history.
-
-        The timestamps are milliseconds since epoch.
-
-        :returns: the track history
-        :rtype: list of (timestamp, :class:`mopidy.models.Ref`) tuples
-        """
-        return copy.copy(self._history)
-
-    def _save_state(self):
-        # 500 tracks a 3 minutes -> 24 hours history
-        count_max = 500
-        count = 1
-        history_list = []
-        for timestamp, track in self._history:
-            history_list.append(HistoryTrack(timestamp=timestamp, track=track))
-            count += 1
-            if count_max < count:
-                logger.info("Limiting history to %s tracks", count_max)
-                break
-        return HistoryState(history=history_list)
-
-    def _load_state(self, state, coverage):
-        if state and "history" in coverage:
-            self._history = [(h.timestamp, h.track) for h in state.history]
diff --git a/venv/lib/python3.7/site-packages/mopidy/core/library.py b/venv/lib/python3.7/site-packages/mopidy/core/library.py
deleted file mode 100644
index b3d7630..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/core/library.py
+++ /dev/null
@@ -1,351 +0,0 @@
-import collections
-import contextlib
-import logging
-import operator
-import urllib
-from collections.abc import Mapping
-
-from mopidy import exceptions, models
-from mopidy.internal import validation
-
-logger = logging.getLogger(__name__)
-
-
-@contextlib.contextmanager
-def _backend_error_handling(backend, reraise=None):
-    try:
-        yield
-    except exceptions.ValidationError as e:
-        logger.error(
-            "%s backend returned bad data: %s",
-            backend.actor_ref.actor_class.__name__,
-            e,
-        )
-    except Exception as e:
-        if reraise and isinstance(e, reraise):
-            raise
-        logger.exception(
-            "%s backend caused an exception.",
-            backend.actor_ref.actor_class.__name__,
-        )
-
-
-class LibraryController:
-    def __init__(self, backends, core):
-        self.backends = backends
-        self.core = core
-
-    def _get_backend(self, uri):
-        uri_scheme = urllib.parse.urlparse(uri).scheme
-        return self.backends.with_library.get(uri_scheme, None)
-
-    def _get_backends_to_uris(self, uris):
-        if uris:
-            backends_to_uris = collections.defaultdict(list)
-            for uri in uris:
-                backend = self._get_backend(uri)
-                if backend is not None:
-                    backends_to_uris[backend].append(uri)
-        else:
-            backends_to_uris = {
-                b: None for b in self.backends.with_library.values()
-            }
-        return backends_to_uris
-
-    def browse(self, uri):
-        """
-        Browse directories and tracks at the given ``uri``.
-
-        ``uri`` is a string which represents some directory belonging to a
-        backend. To get the intial root directories for backends pass
-        :class:`None` as the URI.
-
-        Returns a list of :class:`mopidy.models.Ref` objects for the
-        directories and tracks at the given ``uri``.
-
-        The :class:`~mopidy.models.Ref` objects representing tracks keep the
-        track's original URI. A matching pair of objects can look like this::
-
-            Track(uri='dummy:/foo.mp3', name='foo', artists=..., album=...)
-            Ref.track(uri='dummy:/foo.mp3', name='foo')
-
-        The :class:`~mopidy.models.Ref` objects representing directories have
-        backend specific URIs. These are opaque values, so no one but the
-        backend that created them should try and derive any meaning from them.
-        The only valid exception to this is checking the scheme, as it is used
-        to route browse requests to the correct backend.
-
-        For example, the dummy library's ``/bar`` directory could be returned
-        like this::
-
-            Ref.directory(uri='dummy:directory:/bar', name='bar')
-
-        :param string uri: URI to browse
-        :rtype: list of :class:`mopidy.models.Ref`
-
-        .. versionadded:: 0.18
-        """
-        if uri is None:
-            return self._roots()
-        elif not uri.strip():
-            return []
-        validation.check_uri(uri)
-        return self._browse(uri)
-
-    def _roots(self):
-        directories = set()
-        backends = self.backends.with_library_browse.values()
-        futures = {b: b.library.root_directory for b in backends}
-        for backend, future in futures.items():
-            with _backend_error_handling(backend):
-                root = future.get()
-                validation.check_instance(root, models.Ref)
-                directories.add(root)
-        return sorted(directories, key=operator.attrgetter("name"))
-
-    def _browse(self, uri):
-        scheme = urllib.parse.urlparse(uri).scheme
-        backend = self.backends.with_library_browse.get(scheme)
-
-        if not backend:
-            return []
-
-        with _backend_error_handling(backend):
-            result = backend.library.browse(uri).get()
-            validation.check_instances(result, models.Ref)
-            return result
-
-        return []
-
-    def get_distinct(self, field, query=None):
-        """
-        List distinct values for a given field from the library.
-
-        This has mainly been added to support the list commands the MPD
-        protocol supports in a more sane fashion. Other frontends are not
-        recommended to use this method.
-
-        :param string field: One of ``track``, ``artist``, ``albumartist``,
-            ``album``, ``composer``, ``performer``, ``date`` or ``genre``.
-        :param dict query: Query to use for limiting results, see
-            :meth:`search` for details about the query format.
-        :rtype: set of values corresponding to the requested field type.
-
-        .. versionadded:: 1.0
-        """
-        validation.check_choice(field, validation.DISTINCT_FIELDS)
-        query is None or validation.check_query(query)  # TODO: normalize?
-
-        result = set()
-        futures = {
-            b: b.library.get_distinct(field, query)
-            for b in self.backends.with_library.values()
-        }
-        for backend, future in futures.items():
-            with _backend_error_handling(backend):
-                values = future.get()
-                if values is not None:
-                    validation.check_instances(values, str)
-                    result.update(values)
-        return result
-
-    def get_images(self, uris):
-        """Lookup the images for the given URIs
-
-        Backends can use this to return image URIs for any URI they know about
-        be it tracks, albums, playlists. The lookup result is a dictionary
-        mapping the provided URIs to lists of images.
-
-        Unknown URIs or URIs the corresponding backend couldn't find anything
-        for will simply return an empty list for that URI.
-
-        :param uris: list of URIs to find images for
-        :type uris: list of string
-        :rtype: {uri: tuple of :class:`mopidy.models.Image`}
-
-        .. versionadded:: 1.0
-        """
-        validation.check_uris(uris)
-
-        futures = {
-            backend: backend.library.get_images(backend_uris)
-            for (backend, backend_uris) in self._get_backends_to_uris(
-                uris
-            ).items()
-            if backend_uris
-        }
-
-        results = {uri: tuple() for uri in uris}
-        for backend, future in futures.items():
-            with _backend_error_handling(backend):
-                if future.get() is None:
-                    continue
-                validation.check_instance(future.get(), Mapping)
-                for uri, images in future.get().items():
-                    if uri not in uris:
-                        raise exceptions.ValidationError(
-                            f"Got unknown image URI: {uri}"
-                        )
-                    validation.check_instances(images, models.Image)
-                    results[uri] += tuple(images)
-        return results
-
-    def lookup(self, uris):
-        """
-        Lookup the given URIs.
-
-        If the URI expands to multiple tracks, the returned list will contain
-        them all.
-
-        :param uris: track URIs
-        :type uris: list of string
-        :rtype: {uri: list of :class:`mopidy.models.Track`}
-        """
-        validation.check_uris(uris)
-
-        futures = {}
-        results = {u: [] for u in uris}
-
-        # TODO: lookup(uris) to backend APIs
-        for backend, backend_uris in self._get_backends_to_uris(uris).items():
-            if backend_uris:
-                for u in backend_uris:
-                    futures[(backend, u)] = backend.library.lookup(u)
-
-        for (backend, u), future in futures.items():
-            with _backend_error_handling(backend):
-                result = future.get()
-                if result is not None:
-                    validation.check_instances(result, models.Track)
-                    # TODO Consider making Track.uri field mandatory, and
-                    # then remove this filtering of tracks without URIs.
-                    results[u] = [r for r in result if r.uri]
-
-        return results
-
-    def refresh(self, uri=None):
-        """
-        Refresh library. Limit to URI and below if an URI is given.
-
-        :param uri: directory or track URI
-        :type uri: string
-        """
-        uri is None or validation.check_uri(uri)
-
-        futures = {}
-        backends = {}
-        uri_scheme = urllib.parse.urlparse(uri).scheme if uri else None
-
-        for backend_scheme, backend in self.backends.with_library.items():
-            backends.setdefault(backend, set()).add(backend_scheme)
-
-        for backend, backend_schemes in backends.items():
-            if uri_scheme is None or uri_scheme in backend_schemes:
-                futures[backend] = backend.library.refresh(uri)
-
-        for backend, future in futures.items():
-            with _backend_error_handling(backend):
-                future.get()
-
-    def search(self, query, uris=None, exact=False):
-        """
-        Search the library for tracks where ``field`` contains ``values``.
-
-        ``field`` can be one of ``uri``, ``track_name``, ``album``, ``artist``,
-        ``albumartist``, ``composer``, ``performer``, ``track_no``, ``genre``,
-        ``date``, ``comment``, or ``any``.
-
-        If ``uris`` is given, the search is limited to results from within the
-        URI roots. For example passing ``uris=['file:']`` will limit the search
-        to the local backend.
-
-        Examples::
-
-            # Returns results matching 'a' in any backend
-            search({'any': ['a']})
-
-            # Returns results matching artist 'xyz' in any backend
-            search({'artist': ['xyz']})
-
-            # Returns results matching 'a' and 'b' and artist 'xyz' in any
-            # backend
-            search({'any': ['a', 'b'], 'artist': ['xyz']})
-
-            # Returns results matching 'a' if within the given URI roots
-            # "file:///media/music" and "spotify:"
-            search({'any': ['a']}, uris=['file:///media/music', 'spotify:'])
-
-            # Returns results matching artist 'xyz' and 'abc' in any backend
-            search({'artist': ['xyz', 'abc']})
-
-        :param query: one or more queries to search for
-        :type query: dict
-        :param uris: zero or more URI roots to limit the search to
-        :type uris: list of string or :class:`None`
-        :param exact: if the search should use exact matching
-        :type exact: :class:`bool`
-        :rtype: list of :class:`mopidy.models.SearchResult`
-
-        .. versionadded:: 1.0
-            The ``exact`` keyword argument.
-        """
-        query = _normalize_query(query)
-
-        uris is None or validation.check_uris(uris)
-        validation.check_query(query)
-        validation.check_boolean(exact)
-
-        if not query:
-            return []
-
-        futures = {}
-        for backend, backend_uris in self._get_backends_to_uris(uris).items():
-            futures[backend] = backend.library.search(
-                query=query, uris=backend_uris, exact=exact
-            )
-
-        # Some of our tests check for LookupError to catch bad queries. This is
-        # silly and should be replaced with query validation before passing it
-        # to the backends.
-        reraise = (TypeError, LookupError)
-
-        results = []
-        for backend, future in futures.items():
-            try:
-                with _backend_error_handling(backend, reraise=reraise):
-                    result = future.get()
-                    if result is not None:
-                        validation.check_instance(result, models.SearchResult)
-                        results.append(result)
-            except TypeError:
-                backend_name = backend.actor_ref.actor_class.__name__
-                logger.warning(
-                    '%s does not implement library.search() with "exact" '
-                    "support. Please upgrade it.",
-                    backend_name,
-                )
-
-        return results
-
-
-def _normalize_query(query):
-    broken_client = False
-    # TODO: this breaks if query is not a dictionary like object...
-    for (field, values) in query.items():
-        if isinstance(values, str):
-            broken_client = True
-            query[field] = [values]
-    if broken_client:
-        logger.warning(
-            "A client or frontend made a broken library search. Values in "
-            "queries must be lists of strings, not a string. Please check what"
-            " sent this query and file a bug. Query: %s",
-            query,
-        )
-    if not query:
-        logger.warning(
-            "A client or frontend made a library search with an empty query. "
-            "This is strongly discouraged. Please check what sent this query "
-            "and file a bug."
-        )
-    return query
diff --git a/venv/lib/python3.7/site-packages/mopidy/core/listener.py b/venv/lib/python3.7/site-packages/mopidy/core/listener.py
deleted file mode 100644
index b022225..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/core/listener.py
+++ /dev/null
@@ -1,187 +0,0 @@
-from mopidy import listener
-
-
-class CoreListener(listener.Listener):
-
-    """
-    Marker interface for recipients of events sent by the core actor.
-
-    Any Pykka actor that mixes in this class will receive calls to the methods
-    defined here when the corresponding events happen in the core actor. This
-    interface is used both for looking up what actors to notify of the events,
-    and for providing default implementations for those listeners that are not
-    interested in all events.
-    """
-
-    @staticmethod
-    def send(event, **kwargs):
-        """Helper to allow calling of core listener events"""
-        listener.send(CoreListener, event, **kwargs)
-
-    def on_event(self, event, **kwargs):
-        """
-        Called on all events.
-
-        *MAY* be implemented by actor. By default, this method forwards the
-        event to the specific event methods.
-
-        :param event: the event name
-        :type event: string
-        :param kwargs: any other arguments to the specific event handlers
-        """
-        # Just delegate to parent, entry mostly for docs.
-        super().on_event(event, **kwargs)
-
-    def track_playback_paused(self, tl_track, time_position):
-        """
-        Called whenever track playback is paused.
-
-        *MAY* be implemented by actor.
-
-        :param tl_track: the track that was playing when playback paused
-        :type tl_track: :class:`mopidy.models.TlTrack`
-        :param time_position: the time position in milliseconds
-        :type time_position: int
-        """
-        pass
-
-    def track_playback_resumed(self, tl_track, time_position):
-        """
-        Called whenever track playback is resumed.
-
-        *MAY* be implemented by actor.
-
-        :param tl_track: the track that was playing when playback resumed
-        :type tl_track: :class:`mopidy.models.TlTrack`
-        :param time_position: the time position in milliseconds
-        :type time_position: int
-        """
-        pass
-
-    def track_playback_started(self, tl_track):
-        """
-        Called whenever a new track starts playing.
-
-        *MAY* be implemented by actor.
-
-        :param tl_track: the track that just started playing
-        :type tl_track: :class:`mopidy.models.TlTrack`
-        """
-        pass
-
-    def track_playback_ended(self, tl_track, time_position):
-        """
-        Called whenever playback of a track ends.
-
-        *MAY* be implemented by actor.
-
-        :param tl_track: the track that was played before playback stopped
-        :type tl_track: :class:`mopidy.models.TlTrack`
-        :param time_position: the time position in milliseconds
-        :type time_position: int
-        """
-        pass
-
-    def playback_state_changed(self, old_state, new_state):
-        """
-        Called whenever playback state is changed.
-
-        *MAY* be implemented by actor.
-
-        :param old_state: the state before the change
-        :type old_state: string from :class:`mopidy.core.PlaybackState` field
-        :param new_state: the state after the change
-        :type new_state: string from :class:`mopidy.core.PlaybackState` field
-        """
-        pass
-
-    def tracklist_changed(self):
-        """
-        Called whenever the tracklist is changed.
-
-        *MAY* be implemented by actor.
-        """
-        pass
-
-    def playlists_loaded(self):
-        """
-        Called when playlists are loaded or refreshed.
-
-        *MAY* be implemented by actor.
-        """
-        pass
-
-    def playlist_changed(self, playlist):
-        """
-        Called whenever a playlist is changed.
-
-        *MAY* be implemented by actor.
-
-        :param playlist: the changed playlist
-        :type playlist: :class:`mopidy.models.Playlist`
-        """
-        pass
-
-    def playlist_deleted(self, uri):
-        """
-        Called whenever a playlist is deleted.
-
-        *MAY* be implemented by actor.
-
-        :param uri: the URI of the deleted playlist
-        :type uri: string
-        """
-        pass
-
-    def options_changed(self):
-        """
-        Called whenever an option is changed.
-
-        *MAY* be implemented by actor.
-        """
-        pass
-
-    def volume_changed(self, volume):
-        """
-        Called whenever the volume is changed.
-
-        *MAY* be implemented by actor.
-
-        :param volume: the new volume in the range [0..100]
-        :type volume: int
-        """
-        pass
-
-    def mute_changed(self, mute):
-        """
-        Called whenever the mute state is changed.
-
-        *MAY* be implemented by actor.
-
-        :param mute: the new mute state
-        :type mute: boolean
-        """
-        pass
-
-    def seeked(self, time_position):
-        """
-        Called whenever the time position changes by an unexpected amount, e.g.
-        at seek to a new time position.
-
-        *MAY* be implemented by actor.
-
-        :param time_position: the position that was seeked to in milliseconds
-        :type time_position: int
-        """
-        pass
-
-    def stream_title_changed(self, title):
-        """
-        Called whenever the currently playing stream title changes.
-
-        *MAY* be implemented by actor.
-
-        :param title: the new stream title
-        :type title: string
-        """
-        pass
diff --git a/venv/lib/python3.7/site-packages/mopidy/core/mixer.py b/venv/lib/python3.7/site-packages/mopidy/core/mixer.py
deleted file mode 100644
index 5c81cd4..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/core/mixer.py
+++ /dev/null
@@ -1,111 +0,0 @@
-import contextlib
-import logging
-
-from mopidy import exceptions
-from mopidy.internal import validation
-from mopidy.internal.models import MixerState
-
-logger = logging.getLogger(__name__)
-
-
-@contextlib.contextmanager
-def _mixer_error_handling(mixer):
-    try:
-        yield
-    except exceptions.ValidationError as e:
-        logger.error(
-            "%s mixer returned bad data: %s",
-            mixer.actor_ref.actor_class.__name__,
-            e,
-        )
-    except Exception:
-        logger.exception(
-            "%s mixer caused an exception.",
-            mixer.actor_ref.actor_class.__name__,
-        )
-
-
-class MixerController:
-    def __init__(self, mixer):
-        self._mixer = mixer
-
-    def get_volume(self):
-        """Get the volume.
-
-        Integer in range [0..100] or :class:`None` if unknown.
-
-        The volume scale is linear.
-        """
-        if self._mixer is None:
-            return None
-
-        with _mixer_error_handling(self._mixer):
-            volume = self._mixer.get_volume().get()
-            volume is None or validation.check_integer(volume, min=0, max=100)
-            return volume
-
-        return None
-
-    def set_volume(self, volume):
-        """Set the volume.
-
-        The volume is defined as an integer in range [0..100].
-
-        The volume scale is linear.
-
-        Returns :class:`True` if call is successful, otherwise :class:`False`.
-        """
-        validation.check_integer(volume, min=0, max=100)
-
-        if self._mixer is None:
-            return False  # TODO: 2.0 return None
-
-        with _mixer_error_handling(self._mixer):
-            result = self._mixer.set_volume(volume).get()
-            validation.check_instance(result, bool)
-            return result
-
-        return False
-
-    def get_mute(self):
-        """Get mute state.
-
-        :class:`True` if muted, :class:`False` unmuted, :class:`None` if
-        unknown.
-        """
-        if self._mixer is None:
-            return None
-
-        with _mixer_error_handling(self._mixer):
-            mute = self._mixer.get_mute().get()
-            mute is None or validation.check_instance(mute, bool)
-            return mute
-
-        return None
-
-    def set_mute(self, mute):
-        """Set mute state.
-
-        :class:`True` to mute, :class:`False` to unmute.
-
-        Returns :class:`True` if call is successful, otherwise :class:`False`.
-        """
-        validation.check_boolean(mute)
-        if self._mixer is None:
-            return False  # TODO: 2.0 return None
-
-        with _mixer_error_handling(self._mixer):
-            result = self._mixer.set_mute(bool(mute)).get()
-            validation.check_instance(result, bool)
-            return result
-
-        return False
-
-    def _save_state(self):
-        return MixerState(volume=self.get_volume(), mute=self.get_mute())
-
-    def _load_state(self, state, coverage):
-        if state and "mixer" in coverage:
-            self.set_mute(state.mute)
-            if state.volume:
-                self.set_volume(state.volume)
diff --git a/venv/lib/python3.7/site-packages/mopidy/core/playback.py b/venv/lib/python3.7/site-packages/mopidy/core/playback.py
deleted file mode 100644
index 15611d4..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/core/playback.py
+++ /dev/null
@@ -1,558 +0,0 @@
-import logging
-import urllib
-
-from pykka.messages import ProxyCall
-
-from mopidy.audio import PlaybackState
-from mopidy.core import listener
-from mopidy.internal import deprecation, models, validation
-
-logger = logging.getLogger(__name__)
-
-
-class PlaybackController:
-    def __init__(self, audio, backends, core):
-        # TODO: these should be internal
-        self.backends = backends
-        self.core = core
-        self._audio = audio
-
-        self._stream_title = None
-        self._state = PlaybackState.STOPPED
-
-        self._current_tl_track = None
-        self._pending_tl_track = None
-
-        self._pending_position = None
-        self._last_position = None
-        self._previous = False
-
-        self._start_at_position = None
-        self._start_paused = False
-
-        if self._audio:
-            self._audio.set_about_to_finish_callback(
-                self._on_about_to_finish_callback
-            )
-
-    def _get_backend(self, tl_track):
-        if tl_track is None:
-            return None
-        uri_scheme = urllib.parse.urlparse(tl_track.track.uri).scheme
-        return self.backends.with_playback.get(uri_scheme, None)
-
-    def get_current_tl_track(self):
-        """Get the currently playing or selected track.
-
-        Returns a :class:`mopidy.models.TlTrack` or :class:`None`.
-        """
-        return self._current_tl_track
-
-    def _set_current_tl_track(self, value):
-        """Set the currently playing or selected track.
-
-        *Internal:* This is only for use by Mopidy's test suite.
-        """
-        self._current_tl_track = value
-
-    def get_current_track(self):
-        """
-        Get the currently playing or selected track.
-
-        Extracted from :meth:`get_current_tl_track` for convenience.
-
-        Returns a :class:`mopidy.models.Track` or :class:`None`.
-        """
-        return getattr(self.get_current_tl_track(), "track", None)
-
-    def get_current_tlid(self):
-        """
-        Get the currently playing or selected TLID.
-
-        Extracted from :meth:`get_current_tl_track` for convenience.
-
-        Returns a :class:`int` or :class:`None`.
-
-        .. versionadded:: 1.1
-        """
-        return getattr(self.get_current_tl_track(), "tlid", None)
-
-    def get_stream_title(self):
-        """Get the current stream title or :class:`None`."""
-        return self._stream_title
-
-    def get_state(self):
-        """Get The playback state."""
-
-        return self._state
-
-    def set_state(self, new_state):
-        """Set the playback state.
-
-        Must be :attr:`PLAYING`, :attr:`PAUSED`, or :attr:`STOPPED`.
-
-        Possible states and transitions:
-
-        .. digraph:: state_transitions
-
-            "STOPPED" -> "PLAYING" [ label="play" ]
-            "STOPPED" -> "PAUSED" [ label="pause" ]
-            "PLAYING" -> "STOPPED" [ label="stop" ]
-            "PLAYING" -> "PAUSED" [ label="pause" ]
-            "PLAYING" -> "PLAYING" [ label="play" ]
-            "PAUSED" -> "PLAYING" [ label="resume" ]
-            "PAUSED" -> "STOPPED" [ label="stop" ]
-        """
-        validation.check_choice(new_state, validation.PLAYBACK_STATES)
-
-        (old_state, self._state) = (self.get_state(), new_state)
-        logger.debug("Changing state: %s -> %s", old_state, new_state)
-
-        self._trigger_playback_state_changed(old_state, new_state)
-
-    def get_time_position(self):
-        """Get time position in milliseconds."""
-        if self._pending_position is not None:
-            return self._pending_position
-        backend = self._get_backend(self.get_current_tl_track())
-        if backend:
-            # TODO: Wrap backend call in error handling.
-            return backend.playback.get_time_position().get()
-        else:
-            return 0
-
-    def _on_end_of_stream(self):
-        self.set_state(PlaybackState.STOPPED)
-        if self._current_tl_track:
-            self._trigger_track_playback_ended(self.get_time_position())
-        self._set_current_tl_track(None)
-
-    def _on_stream_changed(self, uri):
-        if self._last_position is None:
-            position = self.get_time_position()
-        else:
-            # This code path handles the stop() case, uri should be none.
-            position, self._last_position = self._last_position, None
-
-        if self._pending_position is None:
-            self._trigger_track_playback_ended(position)
-
-        self._stream_title = None
-        if self._pending_tl_track:
-            self._set_current_tl_track(self._pending_tl_track)
-            self._pending_tl_track = None
-
-            if self._pending_position is None:
-                self.set_state(PlaybackState.PLAYING)
-                self._trigger_track_playback_started()
-                seek_ok = False
-                if self._start_at_position:
-                    seek_ok = self.seek(self._start_at_position)
-                    self._start_at_position = None
-                if not seek_ok and self._start_paused:
-                    self.pause()
-                    self._start_paused = False
-            else:
-                self._seek(self._pending_position)
-
-    def _on_position_changed(self, position):
-        if self._pending_position is not None:
-            self._trigger_seeked(self._pending_position)
-            self._pending_position = None
-            if self._start_paused:
-                self._start_paused = False
-                self.pause()
-
-    def _on_about_to_finish_callback(self):
-        """Callback that performs a blocking actor call to the real callback.
-
-        This is passed to audio, which is allowed to call this code from the
-        audio thread. We pass execution into the core actor to ensure that
-        there is no unsafe access of state in core. This must block until
-        we get a response.
-        """
-        self.core.actor_ref.ask(
-            ProxyCall(
-                attr_path=["playback", "_on_about_to_finish"],
-                args=[],
-                kwargs={},
-            )
-        )
-
-    def _on_about_to_finish(self):
-        if self._state == PlaybackState.STOPPED:
-            return
-
-        # Unless overridden by other calls (e.g. next / previous / stop) this
-        # will be the last position recorded until the track gets reassigned.
-        # TODO: Check if case when track.length isn't populated needs to be
-        # handled.
-        self._last_position = self._current_tl_track.track.length
-
-        pending = self.core.tracklist.eot_track(self._current_tl_track)
-        # avoid endless loop if 'repeat' is 'true' and no track is playable
-        # * 2 -> second run to get all playable track in a shuffled playlist
-        count = self.core.tracklist.get_length() * 2
-
-        while pending:
-            backend = self._get_backend(pending)
-            if backend:
-                try:
-                    if backend.playback.change_track(pending.track).get():
-                        self._pending_tl_track = pending
-                        break
-                except Exception:
-                    logger.exception(
-                        "%s backend caused an exception.",
-                        backend.actor_ref.actor_class.__name__,
-                    )
-
-            self.core.tracklist._mark_unplayable(pending)
-            pending = self.core.tracklist.eot_track(pending)
-            count -= 1
-            if not count:
-                logger.info("No playable track in the list.")
-                break
-
-    def _on_tracklist_change(self):
-        """
-        Tell the playback controller that the current playlist has changed.
-
-        Used by :class:`mopidy.core.TracklistController`.
-        """
-        tl_tracks = self.core.tracklist.get_tl_tracks()
-        if not tl_tracks:
-            self.stop()
-            self._set_current_tl_track(None)
-        elif self.get_current_tl_track() not in tl_tracks:
-            self._set_current_tl_track(None)
-
-    def next(self):
-        """
-        Change to the next track.
-
-        The current playback state will be kept. If it was playing, playing
-        will continue. If it was paused, it will still be paused, etc.
-        """
-        state = self.get_state()
-        current = self._pending_tl_track or self._current_tl_track
-        # avoid endless loop if 'repeat' is 'true' and no track is playable
-        # * 2 -> second run to get all playable track in a shuffled playlist
-        count = self.core.tracklist.get_length() * 2
-
-        while current:
-            pending = self.core.tracklist.next_track(current)
-            if self._change(pending, state):
-                break
-            else:
-                self.core.tracklist._mark_unplayable(pending)
-            # TODO: this could be needed to prevent a loop in rare cases
-            # if current == pending:
-            #     break
-            current = pending
-            count -= 1
-            if not count:
-                logger.info("No playable track in the list.")
-                break
-
-        # TODO return result?
-
-    def pause(self):
-        """Pause playback."""
-        backend = self._get_backend(self.get_current_tl_track())
-        # TODO: Wrap backend call in error handling.
-        if not backend or backend.playback.pause().get():
-            # TODO: switch to:
-            # backend.track(pause)
-            # wait for state change?
-            self.set_state(PlaybackState.PAUSED)
-            self._trigger_track_playback_paused()
-
-    def play(self, tl_track=None, tlid=None):
-        """
-        Play the given track, or if the given tl_track and tlid is
-        :class:`None`, play the currently active track.
-
-        Note that the track **must** already be in the tracklist.
-
-        .. deprecated:: 3.0
-            The ``tl_track`` argument. Use ``tlid`` instead.
-
-        :param tl_track: track to play
-        :type tl_track: :class:`mopidy.models.TlTrack` or :class:`None`
-        :param tlid: TLID of the track to play
-        :type tlid: :class:`int` or :class:`None`
-        """
-        if sum(o is not None for o in [tl_track, tlid]) > 1:
-            raise ValueError('At most one of "tl_track" and "tlid" may be set')
-
-        tl_track is None or validation.check_instance(tl_track, models.TlTrack)
-        tlid is None or validation.check_integer(tlid, min=1)
-
-        if tl_track:
-            deprecation.warn("core.playback.play:tl_track_kwarg")
-
-        if tl_track is None and tlid is not None:
-            for tl_track in self.core.tracklist.get_tl_tracks():
-                if tl_track.tlid == tlid:
-                    break
-            else:
-                tl_track = None
-
-        if tl_track is not None:
-            # TODO: allow from outside tracklist, would make sense given refs?
-            assert tl_track in self.core.tracklist.get_tl_tracks()
-        elif tl_track is None and self.get_state() == PlaybackState.PAUSED:
-            self.resume()
-            return
-
-        current = self._pending_tl_track or self._current_tl_track
-        pending = tl_track or current or self.core.tracklist.next_track(None)
-        # avoid endless loop if 'repeat' is 'true' and no track is playable
-        # * 2 -> second run to get all playable track in a shuffled playlist
-        count = self.core.tracklist.get_length() * 2
-
-        while pending:
-            if self._change(pending, PlaybackState.PLAYING):
-                break
-            else:
-                self.core.tracklist._mark_unplayable(pending)
-            current = pending
-            pending = self.core.tracklist.next_track(current)
-            count -= 1
-            if not count:
-                logger.info("No playable track in the list.")
-                break
-
-        # TODO return result?
-
-    def _change(self, pending_tl_track, state):
-        self._pending_tl_track = pending_tl_track
-
-        if not pending_tl_track:
-            self.stop()
-            self._on_end_of_stream()  # pretend an EOS happened for cleanup
-            return True
-
-        backend = self._get_backend(pending_tl_track)
-        if not backend:
-            return False
-
-        # This must happen before prepare_change gets called, otherwise the
-        # backend flushes the information of the track.
-        self._last_position = self.get_time_position()
-
-        # TODO: Wrap backend call in error handling.
-        backend.playback.prepare_change()
-
-        try:
-            if not backend.playback.change_track(pending_tl_track.track).get():
-                return False
-        except Exception:
-            logger.exception(
-                "%s backend caused an exception.",
-                backend.actor_ref.actor_class.__name__,
-            )
-            return False
-
-        # TODO: Wrap backend calls in error handling.
-        if state == PlaybackState.PLAYING:
-            try:
-                return backend.playback.play().get()
-            except TypeError:
-                # TODO: check by binding against underlying play method using
-                # inspect and otherwise re-raise?
-                logger.error(
-                    "%s needs to be updated to work with this "
-                    "version of Mopidy.",
-                    backend,
-                )
-                return False
-        elif state == PlaybackState.PAUSED:
-            return backend.playback.pause().get()
-        elif state == PlaybackState.STOPPED:
-            # TODO: emit some event now?
-            self._current_tl_track = self._pending_tl_track
-            self._pending_tl_track = None
-            return True
-
-        raise Exception(f"Unknown state: {state}")
-
-    def previous(self):
-        """
-        Change to the previous track.
-
-        The current playback state will be kept. If it was playing, playing
-        will continue. If it was paused, it will still be paused, etc.
-        """
-        self._previous = True
-        state = self.get_state()
-        current = self._pending_tl_track or self._current_tl_track
-        # avoid endless loop if 'repeat' is 'true' and no track is playable
-        # * 2 -> second run to get all playable track in a shuffled playlist
-        count = self.core.tracklist.get_length() * 2
-
-        while current:
-            pending = self.core.tracklist.previous_track(current)
-            if self._change(pending, state):
-                break
-            else:
-                self.core.tracklist._mark_unplayable(pending)
-            # TODO: this could be needed to prevent a loop in rare cases
-            # if current == pending:
-            #     break
-            current = pending
-            count -= 1
-            if not count:
-                logger.info("No playable track in the list.")
-                break
-
-        # TODO: no return value?
-
-    def resume(self):
-        """If paused, resume playing the current track."""
-        if self.get_state() != PlaybackState.PAUSED:
-            return
-        backend = self._get_backend(self.get_current_tl_track())
-        # TODO: Wrap backend call in error handling.
-        if backend and backend.playback.resume().get():
-            self.set_state(PlaybackState.PLAYING)
-            # TODO: trigger via gst messages
-            self._trigger_track_playback_resumed()
-        # TODO: switch to:
-        # backend.resume()
-        # wait for state change?
-
-    def seek(self, time_position):
-        """
-        Seeks to time position given in milliseconds.
-
-        :param time_position: time position in milliseconds
-        :type time_position: int
-        :rtype: :class:`True` if successful, else :class:`False`
-        """
-        # TODO: seek needs to take pending tracks into account :(
-        validation.check_integer(time_position)
-
-        if time_position < 0:
-            logger.debug("Client seeked to negative position. Seeking to zero.")
-            time_position = 0
-
-        if not self.core.tracklist.get_length():
-            return False
-
-        if self.get_state() == PlaybackState.STOPPED:
-            self.play()
-
-        # We need to prefer the still playing track, but if nothing is playing
-        # we fall back to the pending one.
-        tl_track = self._current_tl_track or self._pending_tl_track
-        if tl_track and tl_track.track.length is None:
-            return False
-
-        if time_position < 0:
-            time_position = 0
-        elif time_position > tl_track.track.length:
-            # TODO: GStreamer will trigger a about-to-finish for us, use that?
-            self.next()
-            return True
-
-        # Store our target position.
-        self._pending_position = time_position
-
-        # Make sure we switch back to previous track if we get a seek while we
-        # have a pending track.
-        if self._current_tl_track and self._pending_tl_track:
-            self._change(self._current_tl_track, self.get_state())
-        else:
-            return self._seek(time_position)
-
-    def _seek(self, time_position):
-        backend = self._get_backend(self.get_current_tl_track())
-        if not backend:
-            return False
-        # TODO: Wrap backend call in error handling.
-        return backend.playback.seek(time_position).get()
-
-    def stop(self):
-        """Stop playing."""
-        if self.get_state() != PlaybackState.STOPPED:
-            self._last_position = self.get_time_position()
-            backend = self._get_backend(self.get_current_tl_track())
-            # TODO: Wrap backend call in error handling.
-            if not backend or backend.playback.stop().get():
-                self.set_state(PlaybackState.STOPPED)
-
-    def _trigger_track_playback_paused(self):
-        logger.debug("Triggering track playback paused event")
-        if self.get_current_tl_track() is None:
-            return
-        listener.CoreListener.send(
-            "track_playback_paused",
-            tl_track=self.get_current_tl_track(),
-            time_position=self.get_time_position(),
-        )
-
-    def _trigger_track_playback_resumed(self):
-        logger.debug("Triggering track playback resumed event")
-        if self.get_current_tl_track() is None:
-            return
-        listener.CoreListener.send(
-            "track_playback_resumed",
-            tl_track=self.get_current_tl_track(),
-            time_position=self.get_time_position(),
-        )
-
-    def _trigger_track_playback_started(self):
-        if self.get_current_tl_track() is None:
-            return
-
-        logger.debug("Triggering track playback started event")
-        tl_track = self.get_current_tl_track()
-        self.core.tracklist._mark_playing(tl_track)
-        self.core.history._add_track(tl_track.track)
-        listener.CoreListener.send("track_playback_started", tl_track=tl_track)
-
-    def _trigger_track_playback_ended(self, time_position_before_stop):
-        tl_track = self.get_current_tl_track()
-        if tl_track is None:
-            return
-
-        logger.debug("Triggering track playback ended event")
-
-        if not self._previous:
-            self.core.tracklist._mark_played(self._current_tl_track)
-        self._previous = False
-
-        # TODO: Use the lowest of track duration and position.
-        listener.CoreListener.send(
-            "track_playback_ended",
-            tl_track=tl_track,
-            time_position=time_position_before_stop,
-        )
-
-    def _trigger_playback_state_changed(self, old_state, new_state):
-        logger.debug("Triggering playback state change event")
-        listener.CoreListener.send(
-            "playback_state_changed", old_state=old_state, new_state=new_state
-        )
-
-    def _trigger_seeked(self, time_position):
-        # TODO: Trigger this from audio events?
-        logger.debug("Triggering seeked event")
-        listener.CoreListener.send("seeked", time_position=time_position)
-
-    def _save_state(self):
-        return models.PlaybackState(
-            tlid=self.get_current_tlid(),
-            time_position=self.get_time_position(),
-            state=self.get_state(),
-        )
-
-    def _load_state(self, state, coverage):
-        if state and "play-last" in coverage and state.tlid is not None:
-            if state.state == PlaybackState.PAUSED:
-                self._start_paused = True
-            if state.state in (PlaybackState.PLAYING, PlaybackState.PAUSED):
-                self._start_at_position = state.time_position
-                self.play(tlid=state.tlid)
diff --git a/venv/lib/python3.7/site-packages/mopidy/core/playlists.py b/venv/lib/python3.7/site-packages/mopidy/core/playlists.py
deleted file mode 100644
index 5dff83c..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/core/playlists.py
+++ /dev/null
@@ -1,280 +0,0 @@
-import contextlib
-import logging
-import urllib
-
-from mopidy import exceptions
-from mopidy.core import listener
-from mopidy.internal import validation
-from mopidy.models import Playlist, Ref
-
-logger = logging.getLogger(__name__)
-
-
-@contextlib.contextmanager
-def _backend_error_handling(backend, reraise=None):
-    try:
-        yield
-    except exceptions.ValidationError as e:
-        logger.error(
-            "%s backend returned bad data: %s",
-            backend.actor_ref.actor_class.__name__,
-            e,
-        )
-    except Exception as e:
-        if reraise and isinstance(e, reraise):
-            raise
-        logger.exception(
-            "%s backend caused an exception.",
-            backend.actor_ref.actor_class.__name__,
-        )
-
-
-class PlaylistsController:
-    def __init__(self, backends, core):
-        self.backends = backends
-        self.core = core
-
-    def get_uri_schemes(self):
-        """
-        Get the list of URI schemes that support playlists.
-
-        :rtype: list of string
-
-        .. versionadded:: 2.0
-        """
-        return list(sorted(self.backends.with_playlists.keys()))
-
-    def as_list(self):
-        """
-        Get a list of the currently available playlists.
-
-        Returns a list of :class:`~mopidy.models.Ref` objects referring to the
-        playlists. In other words, no information about the playlists' content
-        is given.
-
-        :rtype: list of :class:`mopidy.models.Ref`
-
-        .. versionadded:: 1.0
-        """
-        futures = {
-            backend: backend.playlists.as_list()
-            for backend in set(self.backends.with_playlists.values())
-        }
-
-        results = []
-        for b, future in futures.items():
-            try:
-                with _backend_error_handling(b, reraise=NotImplementedError):
-                    playlists = future.get()
-                    if playlists is not None:
-                        validation.check_instances(playlists, Ref)
-                        results.extend(playlists)
-            except NotImplementedError:
-                backend_name = b.actor_ref.actor_class.__name__
-                logger.warning(
-                    "%s does not implement playlists.as_list(). "
-                    "Please upgrade it.",
-                    backend_name,
-                )
-
-        return results
-
-    def get_items(self, uri):
-        """
-        Get the items in a playlist specified by ``uri``.
-
-        Returns a list of :class:`~mopidy.models.Ref` objects referring to the
-        playlist's items.
-
-        If a playlist with the given ``uri`` doesn't exist, it returns
-        :class:`None`.
-
-        :rtype: list of :class:`mopidy.models.Ref`, or :class:`None`
-
-        .. versionadded:: 1.0
-        """
-        validation.check_uri(uri)
-
-        uri_scheme = urllib.parse.urlparse(uri).scheme
-        backend = self.backends.with_playlists.get(uri_scheme, None)
-
-        if not backend:
-            return None
-
-        with _backend_error_handling(backend):
-            items = backend.playlists.get_items(uri).get()
-            items is None or validation.check_instances(items, Ref)
-            return items
-
-        return None
-
-    def create(self, name, uri_scheme=None):
-        """
-        Create a new playlist.
-
-        If ``uri_scheme`` matches an URI scheme handled by a current backend,
-        that backend is asked to create the playlist. If ``uri_scheme`` is
-        :class:`None` or doesn't match a current backend, the first backend is
-        asked to create the playlist.
-
-        All new playlists must be created by calling this method, and **not**
-        by creating new instances of :class:`mopidy.models.Playlist`.
-
-        :param name: name of the new playlist
-        :type name: string
-        :param uri_scheme: use the backend matching the URI scheme
-        :type uri_scheme: string
-        :rtype: :class:`mopidy.models.Playlist` or :class:`None`
-        """
-        if uri_scheme in self.backends.with_playlists:
-            backends = [self.backends.with_playlists[uri_scheme]]
-        else:
-            backends = self.backends.with_playlists.values()
-
-        for backend in backends:
-            with _backend_error_handling(backend):
-                result = backend.playlists.create(name).get()
-                if result is None:
-                    continue
-                validation.check_instance(result, Playlist)
-                listener.CoreListener.send("playlist_changed", playlist=result)
-                return result
-
-        return None
-
-    def delete(self, uri):
-        """
-        Delete playlist identified by the URI.
-
-        If the URI doesn't match the URI schemes handled by the current
-        backends, nothing happens.
-
-        Returns :class:`True` if deleted, :class:`False` otherwise.
-
-        :param uri: URI of the playlist to delete
-        :type uri: string
-        :rtype: :class:`bool`
-
-        .. versionchanged:: 2.2
-            Return type defined.
-        """
-        validation.check_uri(uri)
-
-        uri_scheme = urllib.parse.urlparse(uri).scheme
-        backend = self.backends.with_playlists.get(uri_scheme, None)
-        if not backend:
-            return False
-
-        success = False
-        with _backend_error_handling(backend):
-            success = backend.playlists.delete(uri).get()
-
-        if success is None:
-            # Return type was defined in Mopidy 2.2. Assume everything went
-            # well if the backend doesn't report otherwise.
-            success = True
-
-        if success:
-            listener.CoreListener.send("playlist_deleted", uri=uri)
-
-        return success
-
-    def lookup(self, uri):
-        """
-        Lookup playlist with given URI in both the set of playlists and in any
-        other playlist sources. Returns :class:`None` if not found.
-
-        :param uri: playlist URI
-        :type uri: string
-        :rtype: :class:`mopidy.models.Playlist` or :class:`None`
-        """
-        uri_scheme = urllib.parse.urlparse(uri).scheme
-        backend = self.backends.with_playlists.get(uri_scheme, None)
-        if not backend:
-            return None
-
-        with _backend_error_handling(backend):
-            playlist = backend.playlists.lookup(uri).get()
-            playlist is None or validation.check_instance(playlist, Playlist)
-            return playlist
-
-        return None
-
-    # TODO: there is an inconsistency between library.refresh(uri) and this
-    # call, not sure how to sort this out.
-    def refresh(self, uri_scheme=None):
-        """
-        Refresh the playlists in :attr:`playlists`.
-
-        If ``uri_scheme`` is :class:`None`, all backends are asked to refresh.
-        If ``uri_scheme`` is an URI scheme handled by a backend, only that
-        backend is asked to refresh. If ``uri_scheme`` doesn't match any
-        current backend, nothing happens.
-
-        :param uri_scheme: limit to the backend matching the URI scheme
-        :type uri_scheme: string
-        """
-        # TODO: check: uri_scheme is None or uri_scheme?
-
-        futures = {}
-        backends = {}
-        playlists_loaded = False
-
-        for backend_scheme, backend in self.backends.with_playlists.items():
-            backends.setdefault(backend, set()).add(backend_scheme)
-
-        for backend, backend_schemes in backends.items():
-            if uri_scheme is None or uri_scheme in backend_schemes:
-                futures[backend] = backend.playlists.refresh()
-
-        for backend, future in futures.items():
-            with _backend_error_handling(backend):
-                future.get()
-                playlists_loaded = True
-
-        if playlists_loaded:
-            listener.CoreListener.send("playlists_loaded")
-
-    def save(self, playlist):
-        """
-        Save the playlist.
-
-        For a playlist to be saveable, it must have the ``uri`` attribute set.
-        You must not set the ``uri`` atribute yourself, but use playlist
-        objects returned by :meth:`create` or retrieved from :attr:`playlists`,
-        which will always give you saveable playlists.
-
-        The method returns the saved playlist. The return playlist may differ
-        from the saved playlist. E.g. if the playlist name was changed, the
-        returned playlist may have a different URI. The caller of this method
-        must throw away the playlist sent to this method, and use the
-        returned playlist instead.
-
-        If the playlist's URI isn't set or doesn't match the URI scheme of a
-        current backend, nothing is done and :class:`None` is returned.
-
-        :param playlist: the playlist
-        :type playlist: :class:`mopidy.models.Playlist`
-        :rtype: :class:`mopidy.models.Playlist` or :class:`None`
-        """
-        validation.check_instance(playlist, Playlist)
-
-        if playlist.uri is None:
-            return  # TODO: log this problem?
-
-        uri_scheme = urllib.parse.urlparse(playlist.uri).scheme
-        backend = self.backends.with_playlists.get(uri_scheme, None)
-        if not backend:
-            return None
-
-        # TODO: we let AssertionError error through due to legacy tests :/
-        with _backend_error_handling(backend, reraise=AssertionError):
-            playlist = backend.playlists.save(playlist).get()
-            playlist is None or validation.check_instance(playlist, Playlist)
-            if playlist:
-                listener.CoreListener.send(
-                    "playlist_changed", playlist=playlist
-                )
-            return playlist
-
-        return None
diff --git a/venv/lib/python3.7/site-packages/mopidy/core/tracklist.py b/venv/lib/python3.7/site-packages/mopidy/core/tracklist.py
deleted file mode 100644
index 1afd37e..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/core/tracklist.py
+++ /dev/null
@@ -1,620 +0,0 @@
-import logging
-import random
-
-from mopidy import exceptions
-from mopidy.core import listener
-from mopidy.internal import deprecation, validation
-from mopidy.internal.models import TracklistState
-from mopidy.models import TlTrack, Track
-
-logger = logging.getLogger(__name__)
-
-
-class TracklistController:
-    def __init__(self, core):
-        self.core = core
-        self._next_tlid = 1
-        self._tl_tracks = []
-        self._version = 0
-
-        self._consume = False
-        self._random = False
-        self._shuffled = []
-        self._repeat = False
-        self._single = False
-
-    def get_tl_tracks(self):
-        """Get tracklist as list of :class:`mopidy.models.TlTrack`."""
-        return self._tl_tracks[:]
-
-    def get_tracks(self):
-        """Get tracklist as list of :class:`mopidy.models.Track`."""
-        return [tl_track.track for tl_track in self._tl_tracks]
-
-    def get_length(self):
-        """Get length of the tracklist."""
-        return len(self._tl_tracks)
-
-    def get_version(self):
-        """
-        Get the tracklist version.
-
-        Integer which is increased every time the tracklist is changed. Is not
-        reset before Mopidy is restarted.
-        """
-        return self._version
-
-    def _increase_version(self):
-        self._version += 1
-        self.core.playback._on_tracklist_change()
-        self._trigger_tracklist_changed()
-
-    def get_consume(self):
-        """Get consume mode.
-
-        :class:`True`
-            Tracks are removed from the tracklist when they have been played.
-        :class:`False`
-            Tracks are not removed from the tracklist.
-        """
-        return self._consume
-
-    def set_consume(self, value):
-        """Set consume mode.
-
-        :class:`True`
-            Tracks are removed from the tracklist when they have been played.
-        :class:`False`
-            Tracks are not removed from the tracklist.
-        """
-        validation.check_boolean(value)
-        if self.get_consume() != value:
-            self._trigger_options_changed()
-        self._consume = value
-
-    def get_random(self):
-        """Get random mode.
-
-        :class:`True`
-            Tracks are selected at random from the tracklist.
-        :class:`False`
-            Tracks are played in the order of the tracklist.
-        """
-        return self._random
-
-    def set_random(self, value):
-        """Set random mode.
-
-        :class:`True`
-            Tracks are selected at random from the tracklist.
-        :class:`False`
-            Tracks are played in the order of the tracklist.
-        """
-        validation.check_boolean(value)
-        if self.get_random() != value:
-            self._trigger_options_changed()
-        if value:
-            self._shuffled = self.get_tl_tracks()
-            random.shuffle(self._shuffled)
-        self._random = value
-
-    def get_repeat(self):
-        """
-        Get repeat mode.
-
-        :class:`True`
-            The tracklist is played repeatedly.
-        :class:`False`
-            The tracklist is played once.
-        """
-        return self._repeat
-
-    def set_repeat(self, value):
-        """
-        Set repeat mode.
-
-        To repeat a single track, set both ``repeat`` and ``single``.
-
-        :class:`True`
-            The tracklist is played repeatedly.
-        :class:`False`
-            The tracklist is played once.
-        """
-        validation.check_boolean(value)
-        if self.get_repeat() != value:
-            self._trigger_options_changed()
-        self._repeat = value
-
-    def get_single(self):
-        """
-        Get single mode.
-
-        :class:`True`
-            Playback is stopped after current song, unless in ``repeat`` mode.
-        :class:`False`
-            Playback continues after current song.
-        """
-        return self._single
-
-    def set_single(self, value):
-        """
-        Set single mode.
-
-        :class:`True`
-            Playback is stopped after current song, unless in ``repeat`` mode.
-        :class:`False`
-            Playback continues after current song.
-        """
-        validation.check_boolean(value)
-        if self.get_single() != value:
-            self._trigger_options_changed()
-        self._single = value
-
-    def index(self, tl_track=None, tlid=None):
-        """
-        The position of the given track in the tracklist.
-
-        If neither *tl_track* or *tlid* is given we return the index of
-        the currently playing track.
-
-        :param tl_track: the track to find the index of
-        :type tl_track: :class:`mopidy.models.TlTrack` or :class:`None`
-        :param tlid: TLID of the track to find the index of
-        :type tlid: :class:`int` or :class:`None`
-        :rtype: :class:`int` or :class:`None`
-
-        .. versionadded:: 1.1
-            The *tlid* parameter
-        """
-        tl_track is None or validation.check_instance(tl_track, TlTrack)
-        tlid is None or validation.check_integer(tlid, min=1)
-
-        if tl_track is None and tlid is None:
-            tl_track = self.core.playback.get_current_tl_track()
-
-        if tl_track is not None:
-            try:
-                return self._tl_tracks.index(tl_track)
-            except ValueError:
-                pass
-        elif tlid is not None:
-            for i, tl_track in enumerate(self._tl_tracks):
-                if tl_track.tlid == tlid:
-                    return i
-        return None
-
-    def get_eot_tlid(self):
-        """
-        The TLID of the track that will be played after the current track.
-
-        Not necessarily the same TLID as returned by :meth:`get_next_tlid`.
-
-        :rtype: :class:`int` or :class:`None`
-
-        .. versionadded:: 1.1
-        """
-
-        current_tl_track = self.core.playback.get_current_tl_track()
-
-        with deprecation.ignore("core.tracklist.eot_track"):
-            eot_tl_track = self.eot_track(current_tl_track)
-
-        return getattr(eot_tl_track, "tlid", None)
-
-    def eot_track(self, tl_track):
-        """
-        The track that will be played after the given track.
-
-        Not necessarily the same track as :meth:`next_track`.
-
-        .. deprecated:: 3.0
-            Use :meth:`get_eot_tlid` instead.
-
-        :param tl_track: the reference track
-        :type tl_track: :class:`mopidy.models.TlTrack` or :class:`None`
-        :rtype: :class:`mopidy.models.TlTrack` or :class:`None`
-        """
-        deprecation.warn("core.tracklist.eot_track")
-        tl_track is None or validation.check_instance(tl_track, TlTrack)
-        if self.get_single() and self.get_repeat():
-            return tl_track
-        elif self.get_single():
-            return None
-
-        # Current difference between next and EOT handling is that EOT needs to
-        # handle "single", with that out of the way the rest of the logic is
-        # shared.
-        return self.next_track(tl_track)
-
-    def get_next_tlid(self):
-        """
-        The tlid of the track that will be played if calling
-        :meth:`mopidy.core.PlaybackController.next()`.
-
-        For normal playback this is the next track in the tracklist. If repeat
-        is enabled the next track can loop around the tracklist. When random is
-        enabled this should be a random track, all tracks should be played once
-        before the tracklist repeats.
-
-        :rtype: :class:`int` or :class:`None`
-
-        .. versionadded:: 1.1
-        """
-        current_tl_track = self.core.playback.get_current_tl_track()
-
-        with deprecation.ignore("core.tracklist.next_track"):
-            next_tl_track = self.next_track(current_tl_track)
-
-        return getattr(next_tl_track, "tlid", None)
-
-    def next_track(self, tl_track):
-        """
-        The track that will be played if calling
-        :meth:`mopidy.core.PlaybackController.next()`.
-
-        For normal playback this is the next track in the tracklist. If repeat
-        is enabled the next track can loop around the tracklist. When random is
-        enabled this should be a random track, all tracks should be played once
-        before the tracklist repeats.
-
-        .. deprecated:: 3.0
-            Use :meth:`get_next_tlid` instead.
-
-        :param tl_track: the reference track
-        :type tl_track: :class:`mopidy.models.TlTrack` or :class:`None`
-        :rtype: :class:`mopidy.models.TlTrack` or :class:`None`
-        """
-        deprecation.warn("core.tracklist.next_track")
-        tl_track is None or validation.check_instance(tl_track, TlTrack)
-
-        if not self._tl_tracks:
-            return None
-
-        if self.get_random() and not self._shuffled:
-            if self.get_repeat() or not tl_track:
-                logger.debug("Shuffling tracks")
-                self._shuffled = self._tl_tracks[:]
-                random.shuffle(self._shuffled)
-
-        if self.get_random():
-            if self._shuffled:
-                return self._shuffled[0]
-            return None
-
-        next_index = self.index(tl_track)
-        if next_index is None:
-            next_index = 0
-        else:
-            next_index += 1
-
-        if self.get_repeat():
-            if self.get_consume() and len(self._tl_tracks) == 1:
-                return None
-            else:
-                next_index %= len(self._tl_tracks)
-        elif next_index >= len(self._tl_tracks):
-            return None
-
-        return self._tl_tracks[next_index]
-
-    def get_previous_tlid(self):
-        """
-        Returns the TLID of the track that will be played if calling
-        :meth:`mopidy.core.PlaybackController.previous()`.
-
-        For normal playback this is the previous track in the tracklist. If
-        random and/or consume is enabled it should return the current track
-        instead.
-
-        :rtype: :class:`int` or :class:`None`
-
-        .. versionadded:: 1.1
-        """
-        current_tl_track = self.core.playback.get_current_tl_track()
-
-        with deprecation.ignore("core.tracklist.previous_track"):
-            previous_tl_track = self.previous_track(current_tl_track)
-
-        return getattr(previous_tl_track, "tlid", None)
-
-    def previous_track(self, tl_track):
-        """
-        Returns the track that will be played if calling
-        :meth:`mopidy.core.PlaybackController.previous()`.
-
-        For normal playback this is the previous track in the tracklist. If
-        random and/or consume is enabled it should return the current track
-        instead.
-
-        .. deprecated:: 3.0
-            Use :meth:`get_previous_tlid` instead.
-
-        :param tl_track: the reference track
-        :type tl_track: :class:`mopidy.models.TlTrack` or :class:`None`
-        :rtype: :class:`mopidy.models.TlTrack` or :class:`None`
-        """
-        deprecation.warn("core.tracklist.previous_track")
-        tl_track is None or validation.check_instance(tl_track, TlTrack)
-
-        if self.get_repeat() or self.get_consume() or self.get_random():
-            return tl_track
-
-        position = self.index(tl_track)
-
-        if position in (None, 0):
-            return None
-
-        # Since we know we are not at zero we have to be somewhere in the range
-        # 1 - len(tracks) Thus 'position - 1' will always be within the list.
-        return self._tl_tracks[position - 1]
-
-    def add(self, tracks=None, at_position=None, uris=None):
-        """
-        Add tracks to the tracklist.
-
-        If ``uris`` is given instead of ``tracks``, the URIs are
-        looked up in the library and the resulting tracks are added to the
-        tracklist.
-
-        If ``at_position`` is given, the tracks are inserted at the given
-        position in the tracklist. If ``at_position`` is not given, the tracks
-        are appended to the end of the tracklist.
-
-        Triggers the :meth:`mopidy.core.CoreListener.tracklist_changed` event.
-
-        :param tracks: tracks to add
-        :type tracks: list of :class:`mopidy.models.Track` or :class:`None`
-        :param at_position: position in tracklist to add tracks
-        :type at_position: int or :class:`None`
-        :param uris: list of URIs for tracks to add
-        :type uris: list of string or :class:`None`
-        :rtype: list of :class:`mopidy.models.TlTrack`
-
-        .. versionadded:: 1.0
-            The ``uris`` argument.
-
-        .. deprecated:: 1.0
-            The ``tracks`` argument. Use ``uris``.
-        """
-        if sum(o is not None for o in [tracks, uris]) != 1:
-            raise ValueError('Exactly one of "tracks" or "uris" must be set')
-
-        tracks is None or validation.check_instances(tracks, Track)
-        uris is None or validation.check_uris(uris)
-        validation.check_integer(at_position or 0)
-
-        if tracks:
-            deprecation.warn("core.tracklist.add:tracks_arg")
-
-        if tracks is None:
-            tracks = []
-            track_map = self.core.library.lookup(uris=uris)
-            for uri in uris:
-                tracks.extend(track_map[uri])
-
-        tl_tracks = []
-        max_length = self.core._config["core"]["max_tracklist_length"]
-
-        for track in tracks:
-            if self.get_length() >= max_length:
-                raise exceptions.TracklistFull(
-                    f"Tracklist may contain at most {max_length:d} tracks."
-                )
-
-            tl_track = TlTrack(self._next_tlid, track)
-            self._next_tlid += 1
-            if at_position is not None:
-                self._tl_tracks.insert(at_position, tl_track)
-                at_position += 1
-            else:
-                self._tl_tracks.append(tl_track)
-            tl_tracks.append(tl_track)
-
-        if tl_tracks:
-            self._increase_version()
-
-        return tl_tracks
-
-    def clear(self):
-        """
-        Clear the tracklist.
-
-        Triggers the :meth:`mopidy.core.CoreListener.tracklist_changed` event.
-        """
-        self._tl_tracks = []
-        self._increase_version()
-
-    def filter(self, criteria):
-        """
-        Filter the tracklist by the given criteria.
-
-        Each rule in the criteria consists of a model field and a list of
-        values to compare it against. If the model field matches any of the
-        values, it may be returned.
-
-        Only tracks that match all the given criteria are returned.
-
-        Examples::
-
-            # Returns tracks with TLIDs 1, 2, 3, or 4 (tracklist ID)
-            filter({'tlid': [1, 2, 3, 4]})
-
-            # Returns track with URIs 'xyz' or 'abc'
-            filter({'uri': ['xyz', 'abc']})
-
-            # Returns track with a matching TLIDs (1, 3 or 6) and a
-            # matching URI ('xyz' or 'abc')
-            filter({'tlid': [1, 3, 6], 'uri': ['xyz', 'abc']})
-
-        :param criteria: one or more rules to match by
-        :type criteria: dict, of (string, list) pairs
-        :rtype: list of :class:`mopidy.models.TlTrack`
-        """
-        tlids = criteria.pop("tlid", [])
-        validation.check_query(criteria, validation.TRACKLIST_FIELDS)
-        validation.check_instances(tlids, int)
-
-        matches = self._tl_tracks
-        for (key, values) in criteria.items():
-            matches = [ct for ct in matches if getattr(ct.track, key) in values]
-        if tlids:
-            matches = [ct for ct in matches if ct.tlid in tlids]
-        return matches
-
-    def move(self, start, end, to_position):
-        """
-        Move the tracks in the slice ``[start:end]`` to ``to_position``.
-
-        Triggers the :meth:`mopidy.core.CoreListener.tracklist_changed` event.
-
-        :param start: position of first track to move
-        :type start: int
-        :param end: position after last track to move
-        :type end: int
-        :param to_position: new position for the tracks
-        :type to_position: int
-        """
-        if start == end:
-            end += 1
-
-        tl_tracks = self._tl_tracks
-
-        # TODO: use validation helpers?
-        assert start < end, "start must be smaller than end"
-        assert start >= 0, "start must be at least zero"
-        assert end <= len(
-            tl_tracks
-        ), "end can not be larger than tracklist length"
-        assert to_position >= 0, "to_position must be at least zero"
-        assert to_position <= len(
-            tl_tracks
-        ), "to_position can not be larger than tracklist length"
-
-        new_tl_tracks = tl_tracks[:start] + tl_tracks[end:]
-        for tl_track in tl_tracks[start:end]:
-            new_tl_tracks.insert(to_position, tl_track)
-            to_position += 1
-        self._tl_tracks = new_tl_tracks
-        self._increase_version()
-
-    def remove(self, criteria):
-        """
-        Remove the matching tracks from the tracklist.
-
-        Uses :meth:`filter()` to lookup the tracks to remove.
-
-        Triggers the :meth:`mopidy.core.CoreListener.tracklist_changed` event.
-
-        :param criteria: one or more rules to match by
-        :type criteria: dict, of (string, list) pairs
-        :rtype: list of :class:`mopidy.models.TlTrack` that were removed
-        """
-        tl_tracks = self.filter(criteria)
-        for tl_track in tl_tracks:
-            position = self._tl_tracks.index(tl_track)
-            del self._tl_tracks[position]
-        self._increase_version()
-        return tl_tracks
-
-    def shuffle(self, start=None, end=None):
-        """
-        Shuffles the entire tracklist. If ``start`` and ``end`` is given only
-        shuffles the slice ``[start:end]``.
-
-        Triggers the :meth:`mopidy.core.CoreListener.tracklist_changed` event.
-
-        :param start: position of first track to shuffle
-        :type start: int or :class:`None`
-        :param end: position after last track to shuffle
-        :type end: int or :class:`None`
-        """
-        tl_tracks = self._tl_tracks
-
-        # TOOD: use validation helpers?
-        if start is not None and end is not None:
-            assert start < end, "start must be smaller than end"
-
-        if start is not None:
-            assert start >= 0, "start must be at least zero"
-
-        if end is not None:
-            assert end <= len(tl_tracks), (
-                "end can not be larger than " + "tracklist length"
-            )
-
-        before = tl_tracks[: start or 0]
-        shuffled = tl_tracks[start:end]
-        after = tl_tracks[end or len(tl_tracks) :]
-        random.shuffle(shuffled)
-        self._tl_tracks = before + shuffled + after
-        self._increase_version()
-
-    def slice(self, start, end):
-        """
-        Returns a slice of the tracklist, limited by the given start and end
-        positions.
-
-        :param start: position of first track to include in slice
-        :type start: int
-        :param end: position after last track to include in slice
-        :type end: int
-        :rtype: :class:`mopidy.models.TlTrack`
-        """
-        # TODO: validate slice?
-        return self._tl_tracks[start:end]
-
-    def _mark_playing(self, tl_track):
-        """Internal method for :class:`mopidy.core.PlaybackController`."""
-        if self.get_random() and tl_track in self._shuffled:
-            self._shuffled.remove(tl_track)
-
-    def _mark_unplayable(self, tl_track):
-        """Internal method for :class:`mopidy.core.PlaybackController`."""
-        logger.warning("Track is not playable: %s", tl_track.track.uri)
-        if self.get_consume() and tl_track is not None:
-            self.remove({"tlid": [tl_track.tlid]})
-        if self.get_random() and tl_track in self._shuffled:
-            self._shuffled.remove(tl_track)
-
-    def _mark_played(self, tl_track):
-        """Internal method for :class:`mopidy.core.PlaybackController`."""
-        if self.get_consume() and tl_track is not None:
-            self.remove({"tlid": [tl_track.tlid]})
-            return True
-        return False
-
-    def _trigger_tracklist_changed(self):
-        if self.get_random():
-            self._shuffled = self._tl_tracks[:]
-            random.shuffle(self._shuffled)
-        else:
-            self._shuffled = []
-
-        logger.debug("Triggering event: tracklist_changed()")
-        listener.CoreListener.send("tracklist_changed")
-
-    def _trigger_options_changed(self):
-        logger.debug("Triggering options changed event")
-        listener.CoreListener.send("options_changed")
-
-    def _save_state(self):
-        return TracklistState(
-            tl_tracks=self._tl_tracks,
-            next_tlid=self._next_tlid,
-            consume=self.get_consume(),
-            random=self.get_random(),
-            repeat=self.get_repeat(),
-            single=self.get_single(),
-        )
-
-    def _load_state(self, state, coverage):
-        if state:
-            if "mode" in coverage:
-                self.set_consume(state.consume)
-                self.set_random(state.random)
-                self.set_repeat(state.repeat)
-                self.set_single(state.single)
-            if "tracklist" in coverage:
-                self._next_tlid = max(state.next_tlid, self._next_tlid)
-                self._tl_tracks = list(state.tl_tracks)
-                self._increase_version()
diff --git a/venv/lib/python3.7/site-packages/mopidy/exceptions.py b/venv/lib/python3.7/site-packages/mopidy/exceptions.py
deleted file mode 100644
index 332f36e..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/exceptions.py
+++ /dev/null
@@ -1,53 +0,0 @@
-class MopidyException(Exception):
-    def __init__(self, message, *args, **kwargs):
-        super().__init__(message, *args, **kwargs)
-        self._message = message
-
-    @property
-    def message(self):
-        """Reimplement message field that was deprecated in Python 2.6"""
-        return self._message
-
-    @message.setter  # noqa
-    def message(self, message):
-        self._message = message
-
-
-class BackendError(MopidyException):
-    pass
-
-
-class CoreError(MopidyException):
-    def __init__(self, message, errno=None):
-        super().__init__(message, errno)
-        self.errno = errno
-
-
-class ExtensionError(MopidyException):
-    pass
-
-
-class FrontendError(MopidyException):
-    pass
-
-
-class MixerError(MopidyException):
-    pass
-
-
-class ScannerError(MopidyException):
-    pass
-
-
-class TracklistFull(CoreError):
-    def __init__(self, message, errno=None):
-        super().__init__(message, errno)
-        self.errno = errno
-
-
-class AudioException(MopidyException):
-    pass
-
-
-class ValidationError(ValueError):
-    pass
diff --git a/venv/lib/python3.7/site-packages/mopidy/ext.py b/venv/lib/python3.7/site-packages/mopidy/ext.py
deleted file mode 100644
index 1b4745d..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/ext.py
+++ /dev/null
@@ -1,340 +0,0 @@
-import collections
-import logging
-from collections.abc import Mapping
-
-import pkg_resources
-
-from mopidy import config as config_lib
-from mopidy import exceptions
-from mopidy.internal import path
-
-logger = logging.getLogger(__name__)
-
-
-_extension_data_fields = [
-    "extension",
-    "entry_point",
-    "config_schema",
-    "config_defaults",
-    "command",
-]
-
-ExtensionData = collections.namedtuple("ExtensionData", _extension_data_fields)
-
-
-class Extension:
-
-    """Base class for Mopidy extensions"""
-
-    dist_name = None
-    """The extension's distribution name, as registered on PyPI
-
-    Example: ``Mopidy-Soundspot``
-    """
-
-    ext_name = None
-    """The extension's short name, as used in setup.py and as config section
-    name
-
-    Example: ``soundspot``
-    """
-
-    version = None
-    """The extension's version
-
-    Should match the :attr:`__version__` attribute on the extension's main
-    Python module and the version registered on PyPI.
-    """
-
-    def get_default_config(self):
-        """The extension's default config as a bytestring
-
-        :returns: bytes or unicode
-        """
-        raise NotImplementedError(
-            'Add at least a config section with "enabled = true"'
-        )
-
-    def get_config_schema(self):
-        """The extension's config validation schema
-
-        :returns: :class:`~mopidy.config.schemas.ConfigSchema`
-        """
-        schema = config_lib.ConfigSchema(self.ext_name)
-        schema["enabled"] = config_lib.Boolean()
-        return schema
-
-    @classmethod
-    def get_cache_dir(cls, config):
-        """Get or create cache directory for the extension.
-
-        Use this directory to cache data that can safely be thrown away.
-
-        :param config: the Mopidy config object
-        :return: pathlib.Path
-        """
-        assert cls.ext_name is not None
-        cache_dir_path = (
-            path.expand_path(config["core"]["cache_dir"]) / cls.ext_name
-        )
-        path.get_or_create_dir(cache_dir_path)
-        return cache_dir_path
-
-    @classmethod
-    def get_config_dir(cls, config):
-        """Get or create configuration directory for the extension.
-
-        :param config: the Mopidy config object
-        :return: pathlib.Path
-        """
-        assert cls.ext_name is not None
-        config_dir_path = (
-            path.expand_path(config["core"]["config_dir"]) / cls.ext_name
-        )
-        path.get_or_create_dir(config_dir_path)
-        return config_dir_path
-
-    @classmethod
-    def get_data_dir(cls, config):
-        """Get or create data directory for the extension.
-
-        Use this directory to store data that should be persistent.
-
-        :param config: the Mopidy config object
-        :returns: pathlib.Path
-        """
-        assert cls.ext_name is not None
-        data_dir_path = (
-            path.expand_path(config["core"]["data_dir"]) / cls.ext_name
-        )
-        path.get_or_create_dir(data_dir_path)
-        return data_dir_path
-
-    def get_command(self):
-        """Command to expose to command line users running ``mopidy``.
-
-        :returns:
-          Instance of a :class:`~mopidy.commands.Command` class.
-        """
-        pass
-
-    def validate_environment(self):
-        """Checks if the extension can run in the current environment.
-
-        Dependencies described by :file:`setup.py` are checked by Mopidy, so
-        you should not check their presence here.
-
-        If a problem is found, raise :exc:`~mopidy.exceptions.ExtensionError`
-        with a message explaining the issue.
-
-        :raises: :exc:`~mopidy.exceptions.ExtensionError`
-        :returns: :class:`None`
-        """
-        pass
-
-    def setup(self, registry):
-        """
-        Register the extension's components in the extension :class:`Registry`.
-
-        For example, to register a backend::
-
-            def setup(self, registry):
-                from .backend import SoundspotBackend
-                registry.add('backend', SoundspotBackend)
-
-        See :class:`Registry` for a list of registry keys with a special
-        meaning. Mopidy will instantiate and start any classes registered under
-        the ``frontend`` and ``backend`` registry keys.
-
-        This method can also be used for other setup tasks not involving the
-        extension registry.
-
-        :param registry: the extension registry
-        :type registry: :class:`Registry`
-        """
-        raise NotImplementedError
-
-
-class Registry(Mapping):
-
-    """Registry of components provided by Mopidy extensions.
-
-    Passed to the :meth:`~Extension.setup` method of all extensions. The
-    registry can be used like a dict of string keys and lists.
-
-    Some keys have a special meaning, including, but not limited to:
-
-    - ``backend`` is used for Mopidy backend classes.
-    - ``frontend`` is used for Mopidy frontend classes.
-
-    Extensions can use the registry for allow other to extend the extension
-    itself. For example the ``Mopidy-Local`` historically used the
-    ``local:library`` key to allow other extensions to register library
-    providers for ``Mopidy-Local`` to use. Extensions should namespace
-    custom keys with the extension's :attr:`~Extension.ext_name`,
-    e.g. ``local:foo`` or ``http:bar``.
-    """
-
-    def __init__(self):
-        self._registry = {}
-
-    def add(self, name, cls):
-        """Add a component to the registry.
-
-        Multiple classes can be registered to the same name.
-        """
-        self._registry.setdefault(name, []).append(cls)
-
-    def __getitem__(self, name):
-        return self._registry.setdefault(name, [])
-
-    def __iter__(self):
-        return iter(self._registry)
-
-    def __len__(self):
-        return len(self._registry)
-
-
-def load_extensions():
-    """Find all installed extensions.
-
-    :returns: list of installed extensions
-    """
-
-    installed_extensions = []
-
-    for entry_point in pkg_resources.iter_entry_points("mopidy.ext"):
-        logger.debug("Loading entry point: %s", entry_point)
-        try:
-            extension_class = entry_point.resolve()
-        except Exception as e:
-            logger.exception(
-                f"Failed to load extension {entry_point.name}: {e}"
-            )
-            continue
-
-        try:
-            if not issubclass(extension_class, Extension):
-                raise TypeError  # issubclass raises TypeError on non-class
-        except TypeError:
-            logger.error(
-                "Entry point %s did not contain a valid extension" "class: %r",
-                entry_point.name,
-                extension_class,
-            )
-            continue
-
-        try:
-            extension = extension_class()
-            config_schema = extension.get_config_schema()
-            default_config = extension.get_default_config()
-            command = extension.get_command()
-        except Exception:
-            logger.exception(
-                "Setup of extension from entry point %s failed, "
-                "ignoring extension.",
-                entry_point.name,
-            )
-            continue
-
-        installed_extensions.append(
-            ExtensionData(
-                extension, entry_point, config_schema, default_config, command
-            )
-        )
-
-        logger.debug(
-            "Loaded extension: %s %s", extension.dist_name, extension.version
-        )
-
-    names = (ed.extension.ext_name for ed in installed_extensions)
-    logger.debug("Discovered extensions: %s", ", ".join(names))
-    return installed_extensions
-
-
-def validate_extension_data(data):
-    """Verify extension's dependencies and environment.
-
-    :param extensions: an extension to check
-    :returns: if extension should be run
-    """
-
-    logger.debug("Validating extension: %s", data.extension.ext_name)
-
-    if data.extension.ext_name != data.entry_point.name:
-        logger.warning(
-            "Disabled extension %(ep)s: entry point name (%(ep)s) "
-            "does not match extension name (%(ext)s)",
-            {"ep": data.entry_point.name, "ext": data.extension.ext_name},
-        )
-        return False
-
-    try:
-        data.entry_point.require()
-    except pkg_resources.DistributionNotFound as exc:
-        logger.info(
-            "Disabled extension %s: Dependency %s not found",
-            data.extension.ext_name,
-            exc,
-        )
-        return False
-    except pkg_resources.VersionConflict as exc:
-        if len(exc.args) == 2:
-            found, required = exc.args
-            logger.info(
-                "Disabled extension %s: %s required, but found %s at %s",
-                data.extension.ext_name,
-                required,
-                found,
-                found.location,
-            )
-        else:
-            logger.info(
-                "Disabled extension %s: %s", data.extension.ext_name, exc
-            )
-        return False
-
-    try:
-        data.extension.validate_environment()
-    except exceptions.ExtensionError as exc:
-        logger.info("Disabled extension %s: %s", data.extension.ext_name, exc)
-        return False
-    except Exception:
-        logger.exception(
-            "Validating extension %s failed with an exception.",
-            data.extension.ext_name,
-        )
-        return False
-
-    if not data.config_schema:
-        logger.error(
-            "Extension %s does not have a config schema, disabling.",
-            data.extension.ext_name,
-        )
-        return False
-    elif not isinstance(data.config_schema.get("enabled"), config_lib.Boolean):
-        logger.error(
-            'Extension %s does not have the required "enabled" config'
-            " option, disabling.",
-            data.extension.ext_name,
-        )
-        return False
-
-    for key, value in data.config_schema.items():
-        if not isinstance(value, config_lib.ConfigValue):
-            logger.error(
-                "Extension %s config schema contains an invalid value"
-                ' for the option "%s", disabling.',
-                data.extension.ext_name,
-                key,
-            )
-            return False
-
-    if not data.config_defaults:
-        logger.error(
-            "Extension %s does not have a default config, disabling.",
-            data.extension.ext_name,
-        )
-        return False
-
-    return True
diff --git a/venv/lib/python3.7/site-packages/mopidy/file/__init__.py b/venv/lib/python3.7/site-packages/mopidy/file/__init__.py
deleted file mode 100644
index bf5dbf9..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/file/__init__.py
+++ /dev/null
@@ -1,32 +0,0 @@
-import logging
-import os
-
-import mopidy
-from mopidy import config, ext
-
-logger = logging.getLogger(__name__)
-
-
-class Extension(ext.Extension):
-
-    dist_name = "Mopidy-File"
-    ext_name = "file"
-    version = mopidy.__version__
-
-    def get_default_config(self):
-        conf_file = os.path.join(os.path.dirname(__file__), "ext.conf")
-        return config.read(conf_file)
-
-    def get_config_schema(self):
-        schema = super().get_config_schema()
-        schema["media_dirs"] = config.List(optional=True)
-        schema["excluded_file_extensions"] = config.List(optional=True)
-        schema["show_dotfiles"] = config.Boolean(optional=True)
-        schema["follow_symlinks"] = config.Boolean(optional=True)
-        schema["metadata_timeout"] = config.Integer(optional=True)
-        return schema
-
-    def setup(self, registry):
-        from .backend import FileBackend
-
-        registry.add("backend", FileBackend)
diff --git a/venv/lib/python3.7/site-packages/mopidy/file/backend.py b/venv/lib/python3.7/site-packages/mopidy/file/backend.py
deleted file mode 100644
index 16cafde..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/file/backend.py
+++ /dev/null
@@ -1,18 +0,0 @@
-import logging
-
-import pykka
-
-from mopidy import backend
-from mopidy.file import library
-
-logger = logging.getLogger(__name__)
-
-
-class FileBackend(pykka.ThreadingActor, backend.Backend):
-    uri_schemes = ["file"]
-
-    def __init__(self, config, audio):
-        super().__init__()
-        self.library = library.FileLibraryProvider(backend=self, config=config)
-        self.playback = backend.PlaybackProvider(audio=audio, backend=self)
-        self.playlists = None
diff --git a/venv/lib/python3.7/site-packages/mopidy/file/ext.conf b/venv/lib/python3.7/site-packages/mopidy/file/ext.conf
deleted file mode 100644
index 22b1f18..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/file/ext.conf
+++ /dev/null
@@ -1,19 +0,0 @@
-[file]
-enabled = true
-media_dirs =
-    $XDG_MUSIC_DIR|Music
-    ~/|Home
-show_dotfiles = false
-excluded_file_extensions =
-  .directory
-  .html
-  .jpeg
-  .jpg
-  .log
-  .nfo
-  .pdf
-  .png
-  .txt
-  .zip
-follow_symlinks = false
-metadata_timeout = 1000
diff --git a/venv/lib/python3.7/site-packages/mopidy/file/library.py b/venv/lib/python3.7/site-packages/mopidy/file/library.py
deleted file mode 100644
index 58de047..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/file/library.py
+++ /dev/null
@@ -1,148 +0,0 @@
-import logging
-import os
-
-from mopidy import backend, exceptions, models
-from mopidy.audio import scan, tags
-from mopidy.internal import path
-
-logger = logging.getLogger(__name__)
-
-
-class FileLibraryProvider(backend.LibraryProvider):
-    """Library for browsing local files."""
-
-    # TODO: get_images that can pull from metadata and/or .folder.png etc?
-    # TODO: handle playlists?
-
-    @property
-    def root_directory(self):
-        if not self._media_dirs:
-            return None
-        elif len(self._media_dirs) == 1:
-            uri = path.path_to_uri(self._media_dirs[0]["path"])
-        else:
-            uri = "file:root"
-        return models.Ref.directory(name="Files", uri=uri)
-
-    def __init__(self, backend, config):
-        super().__init__(backend)
-        self._media_dirs = list(self._get_media_dirs(config))
-        self._show_dotfiles = config["file"]["show_dotfiles"]
-        self._excluded_file_extensions = tuple(
-            file_ext.lower()
-            for file_ext in config["file"]["excluded_file_extensions"]
-        )
-        self._follow_symlinks = config["file"]["follow_symlinks"]
-
-        self._scanner = scan.Scanner(timeout=config["file"]["metadata_timeout"])
-
-    def browse(self, uri):
-        logger.debug("Browsing files at: %s", uri)
-        result = []
-        local_path = path.uri_to_path(uri)
-
-        if str(local_path) == "root":
-            return list(self._get_media_dirs_refs())
-
-        if not self._is_in_basedir(local_path):
-            logger.warning(
-                "Rejected attempt to browse path (%s) outside dirs defined "
-                "in file/media_dirs config.",
-                uri,
-            )
-            return []
-
-        for dir_entry in local_path.iterdir():
-            child_path = dir_entry.resolve()
-            uri = path.path_to_uri(child_path)
-
-            if not self._show_dotfiles and dir_entry.name.startswith("."):
-                continue
-
-            if (
-                self._excluded_file_extensions
-                and dir_entry.suffix in self._excluded_file_extensions
-            ):
-                continue
-
-            if child_path.is_symlink() and not self._follow_symlinks:
-                logger.debug("Ignoring symlink: %s", uri)
-                continue
-
-            if not self._is_in_basedir(child_path):
-                logger.debug("Ignoring symlink to outside base dir: %s", uri)
-                continue
-
-            if child_path.is_dir():
-                result.append(
-                    models.Ref.directory(name=dir_entry.name, uri=uri)
-                )
-            elif child_path.is_file():
-                result.append(models.Ref.track(name=dir_entry.name, uri=uri))
-
-        def order(item):
-            return (item.type != models.Ref.DIRECTORY, item.name)
-
-        result.sort(key=order)
-
-        return result
-
-    def lookup(self, uri):
-        logger.debug("Looking up file URI: %s", uri)
-        local_path = path.uri_to_path(uri)
-
-        try:
-            result = self._scanner.scan(uri)
-            track = tags.convert_tags_to_track(result.tags).replace(
-                uri=uri, length=result.duration
-            )
-        except exceptions.ScannerError as e:
-            logger.warning("Failed looking up %s: %s", uri, e)
-            track = models.Track(uri=uri)
-
-        if not track.name:
-            track = track.replace(name=local_path.name)
-
-        return [track]
-
-    def _get_media_dirs(self, config):
-        for entry in config["file"]["media_dirs"]:
-            media_dir = {}
-            media_dir_split = entry.split("|", 1)
-            local_path = path.expand_path(media_dir_split[0])
-
-            if local_path is None:
-                logger.debug(
-                    "Failed expanding path (%s) from file/media_dirs config "
-                    "value.",
-                    media_dir_split[0],
-                )
-                continue
-            elif not local_path.is_dir():
-                logger.warning(
-                    "%s is not a directory. Please create the directory or "
-                    "update the file/media_dirs config value.",
-                    local_path,
-                )
-                continue
-
-            media_dir["path"] = local_path
-            if len(media_dir_split) == 2:
-                media_dir["name"] = media_dir_split[1]
-            else:
-                # TODO Mpd client should accept / in dir name
-                media_dir["name"] = media_dir_split[0].replace(os.sep, "+")
-
-            yield media_dir
-
-    def _get_media_dirs_refs(self):
-        for media_dir in self._media_dirs:
-            yield models.Ref.directory(
-                name=media_dir["name"], uri=path.path_to_uri(media_dir["path"])
-            )
-
-    def _is_in_basedir(self, local_path):
-        return any(
-            path.is_path_inside_base_dir(local_path, media_dir["path"])
-            for media_dir in self._media_dirs
-        )
diff --git a/venv/lib/python3.7/site-packages/mopidy/http/__init__.py b/venv/lib/python3.7/site-packages/mopidy/http/__init__.py
deleted file mode 100644
index 7a9fa05..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/http/__init__.py
+++ /dev/null
@@ -1,53 +0,0 @@
-import logging
-import os
-
-import mopidy
-from mopidy import config as config_lib
-from mopidy import exceptions, ext
-
-logger = logging.getLogger(__name__)
-
-
-class Extension(ext.Extension):
-    dist_name = "Mopidy-HTTP"
-    ext_name = "http"
-    version = mopidy.__version__
-
-    def get_default_config(self):
-        conf_file = os.path.join(os.path.dirname(__file__), "ext.conf")
-        return config_lib.read(conf_file)
-
-    def get_config_schema(self):
-        schema = super().get_config_schema()
-        schema["hostname"] = config_lib.Hostname()
-        schema["port"] = config_lib.Port()
-        schema["static_dir"] = config_lib.Deprecated()
-        schema["zeroconf"] = config_lib.String(optional=True)
-        schema["allowed_origins"] = config_lib.List(optional=True)
-        schema["csrf_protection"] = config_lib.Boolean(optional=True)
-        schema["default_app"] = config_lib.String(optional=True)
-        return schema
-
-    def validate_environment(self):
-        try:
-            import tornado.web  # noqa
-        except ImportError as e:
-            raise exceptions.ExtensionError("tornado library not found", e)
-
-    def setup(self, registry):
-        from .actor import HttpFrontend
-        from .handlers import make_mopidy_app_factory
-
-        HttpFrontend.apps = registry["http:app"]
-        HttpFrontend.statics = registry["http:static"]
-
-        registry.add("frontend", HttpFrontend)
-        registry.add(
-            "http:app",
-            {
-                "name": "mopidy",
-                "factory": make_mopidy_app_factory(
-                    registry["http:app"], registry["http:static"]
-                ),
-            },
-        )
diff --git a/venv/lib/python3.7/site-packages/mopidy/http/actor.py b/venv/lib/python3.7/site-packages/mopidy/http/actor.py
deleted file mode 100644
index 603b5d6..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/http/actor.py
+++ /dev/null
@@ -1,210 +0,0 @@
-import json
-import logging
-import secrets
-import threading
-
-import pykka
-import tornado.httpserver
-import tornado.ioloop
-import tornado.netutil
-import tornado.web
-import tornado.websocket
-
-from mopidy import exceptions, models, zeroconf
-from mopidy.core import CoreListener
-from mopidy.http import Extension, handlers
-from mopidy.internal import formatting, network
-
-try:
-    import asyncio
-except ImportError:
-    asyncio = None
-
-
-logger = logging.getLogger(__name__)
-
-
-class HttpFrontend(pykka.ThreadingActor, CoreListener):
-    apps = []
-    statics = []
-
-    def __init__(self, config, core):
-        super().__init__()
-
-        self.hostname = network.format_hostname(config["http"]["hostname"])
-        self.port = config["http"]["port"]
-        tornado_hostname = config["http"]["hostname"]
-        if tornado_hostname == "::":
-            tornado_hostname = None
-
-        try:
-            logger.debug("Starting HTTP server")
-            sockets = tornado.netutil.bind_sockets(self.port, tornado_hostname)
-            self.server = HttpServer(
-                config=config,
-                core=core,
-                sockets=sockets,
-                apps=self.apps,
-                statics=self.statics,
-            )
-        except OSError as exc:
-            raise exceptions.FrontendError(f"HTTP server startup failed: {exc}")
-
-        self.zeroconf_name = config["http"]["zeroconf"]
-        self.zeroconf_http = None
-        self.zeroconf_mopidy_http = None
-
-    def on_start(self):
-        logger.info("HTTP server running at [%s]:%s", self.hostname, self.port)
-        self.server.start()
-
-        if self.zeroconf_name:
-            self.zeroconf_http = zeroconf.Zeroconf(
-                name=self.zeroconf_name, stype="_http._tcp", port=self.port
-            )
-            self.zeroconf_mopidy_http = zeroconf.Zeroconf(
-                name=self.zeroconf_name,
-                stype="_mopidy-http._tcp",
-                port=self.port,
-            )
-            self.zeroconf_http.publish()
-            self.zeroconf_mopidy_http.publish()
-
-    def on_stop(self):
-        if self.zeroconf_http:
-            self.zeroconf_http.unpublish()
-        if self.zeroconf_mopidy_http:
-            self.zeroconf_mopidy_http.unpublish()
-
-        self.server.stop()
-
-    def on_event(self, name, **data):
-        on_event(name, self.server.io_loop, **data)
-
-
-def on_event(name, io_loop, **data):
-    event = data
-    event["event"] = name
-    message = json.dumps(event, cls=models.ModelJSONEncoder)
-    handlers.WebSocketHandler.broadcast(message, io_loop)
-
-
-class HttpServer(threading.Thread):
-    name = "HttpServer"
-
-    def __init__(self, config, core, sockets, apps, statics):
-        super().__init__()
-
-        self.config = config
-        self.core = core
-        self.sockets = sockets
-        self.apps = apps
-        self.statics = statics
-
-        self.app = None
-        self.server = None
-        self.io_loop = None
-
-    def run(self):
-        if asyncio:
-            # If asyncio is available, Tornado uses it as its IO loop. Since we
-            # start Tornado in a another thread than the main thread, we must
-            # explicitly create an asyncio loop for the current thread.
-            asyncio.set_event_loop(asyncio.new_event_loop())
-
-        self.app = tornado.web.Application(
-            self._get_request_handlers(),
-            cookie_secret=self._get_cookie_secret(),
-        )
-        self.server = tornado.httpserver.HTTPServer(self.app)
-        self.server.add_sockets(self.sockets)
-
-        self.io_loop = tornado.ioloop.IOLoop.current()
-        self.io_loop.start()
-
-        logger.debug("Stopped HTTP server")
-
-    def stop(self):
-        logger.debug("Stopping HTTP server")
-        self.io_loop.add_callback(self.io_loop.stop)
-
-    def _get_request_handlers(self):
-        request_handlers = []
-        request_handlers.extend(self._get_app_request_handlers())
-        request_handlers.extend(self._get_static_request_handlers())
-        request_handlers.extend(self._get_default_request_handlers())
-
-        logger.debug(
-            "HTTP routes from extensions: %s",
-            formatting.indent(
-                "\n".join(
-                    f"{path!r}: {handler!r}"
-                    for (path, handler, *_) in request_handlers
-                )
-            ),
-        )
-
-        return request_handlers
-
-    def _get_app_request_handlers(self):
-        result = []
-        for app in self.apps:
-            try:
-                request_handlers = app["factory"](self.config, self.core)
-            except Exception:
-                logger.exception("Loading %s failed.", app["name"])
-                continue
-
-            result.append((f"/{app['name']}", handlers.AddSlashHandler))
-            for handler in request_handlers:
-                handler = list(handler)
-                handler[0] = f"/{app['name']}{handler[0]}"
-                result.append(tuple(handler))
-            logger.debug("Loaded HTTP extension: %s", app["name"])
-        return result
-
-    def _get_static_request_handlers(self):
-        result = []
-        for static in self.statics:
-            result.append((f"/{static['name']}", handlers.AddSlashHandler))
-            result.append(
-                (
-                    f"/{static['name']}/(.*)",
-                    handlers.StaticFileHandler,
-                    {"path": static["path"], "default_filename": "index.html"},
-                )
-            )
-            logger.debug("Loaded static HTTP extension: %s", static["name"])
-        return result
-
-    def _get_default_request_handlers(self):
-        sites = [app["name"] for app in self.apps + self.statics]
-
-        default_app = self.config["http"]["default_app"]
-        if default_app not in sites:
-            logger.warning(
-                f"HTTP server's default app {default_app!r} not found"
-            )
-            default_app = "mopidy"
-        logger.debug(f"Default webclient is {default_app}")
-
-        return [
-            (
-                r"/",
-                tornado.web.RedirectHandler,
-                {"url": f"/{default_app}/", "permanent": False},
-            )
-        ]
-
-    def _get_cookie_secret(self):
-        file_path = Extension.get_data_dir(self.config) / "cookie_secret"
-        if not file_path.is_file():
-            cookie_secret = secrets.token_hex(32)
-            file_path.write_text(cookie_secret)
-        else:
-            cookie_secret = file_path.read_text().strip()
-            if not cookie_secret:
-                logging.error(
-                    f"HTTP server could not find cookie secret in {file_path}"
-                )
-        return cookie_secret
diff --git a/venv/lib/python3.7/site-packages/mopidy/http/data/clients.html b/venv/lib/python3.7/site-packages/mopidy/http/data/clients.html
deleted file mode 100644
index feff4fe..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/http/data/clients.html
+++ /dev/null
@@ -1,31 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <meta charset="UTF-8">
-    <meta name="viewport" content="width=device-width, initial-scale=1">
-    <title>Mopidy</title>
-    <link rel="stylesheet" type="text/css" href="mopidy.css">
-  </head>
-  <body>
-    <div class="box focus">
-      <h1>Mopidy</h1>
-
-      <p>This web server is a part of the Mopidy music server. To learn more
-      about Mopidy, please visit
-      <a href="http://www.mopidy.com/">www.mopidy.com</a>.</p>
-    </div>
-
-    <div class="box">
-      <h2>Web clients</h2>
-
-      <ul>
-        {% for app in apps %}
-          <li><a href="/{{ url_escape(app) }}/">{{ escape(app) }}</a></li>
-        {% end %}
-      </ul>
-
-      <p>Web clients which are installed as Mopidy extensions will
-      automatically appear here.</p>
-    </div>
-  </body>
-</html>
diff --git a/venv/lib/python3.7/site-packages/mopidy/http/data/favicon.ico b/venv/lib/python3.7/site-packages/mopidy/http/data/favicon.ico
deleted file mode 100644
index a214c91..0000000
Binary files a/venv/lib/python3.7/site-packages/mopidy/http/data/favicon.ico and /dev/null differ
diff --git a/venv/lib/python3.7/site-packages/mopidy/http/data/mopidy.css b/venv/lib/python3.7/site-packages/mopidy/http/data/mopidy.css
deleted file mode 100644
index 0bf4522..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/http/data/mopidy.css
+++ /dev/null
@@ -1,43 +0,0 @@
-html {
-    background: #f8f8f8;
-    color: #555;
-    font-family: Geneva, Tahoma, Verdana, sans-serif;
-    line-height: 1.4em;
-}
-body {
-    max-width: 600px;
-    margin: 0 auto;
-}
-h1, h2 {
-    font-weight: 500;
-    line-height: 1.1em;
-}
-a {
-    color: #555;
-    text-decoration: none;
-    border-bottom: 1px dotted;
-}
-img {
-    border: 0;
-}
-
-.box {
-    background: white;
-    box-shadow: 0px 5px 5px #f0f0f0;
-    margin: 1em;
-    padding: 1em;
-}
-.box.focus {
-    background: #465158;
-    color: #e8ecef;
-}
-
-.box a {
-    color: #465158;
-}
-.box a:hover {
-    opacity: 0.8;
-}
-.box.focus a {
-    color: #e8ecef;
-}
diff --git a/venv/lib/python3.7/site-packages/mopidy/http/ext.conf b/venv/lib/python3.7/site-packages/mopidy/http/ext.conf
deleted file mode 100644
index c986fc3..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/http/ext.conf
+++ /dev/null
@@ -1,8 +0,0 @@
-[http]
-enabled = true
-hostname = 127.0.0.1
-port = 6680
-zeroconf = Mopidy HTTP server on $hostname
-allowed_origins =
-csrf_protection = true
-default_app = mopidy
diff --git a/venv/lib/python3.7/site-packages/mopidy/http/handlers.py b/venv/lib/python3.7/site-packages/mopidy/http/handlers.py
deleted file mode 100644
index 130ced3..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/http/handlers.py
+++ /dev/null
@@ -1,273 +0,0 @@
-import functools
-import logging
-import os
-import urllib
-
-import tornado.escape
-import tornado.ioloop
-import tornado.web
-import tornado.websocket
-
-import mopidy
-from mopidy import core, models
-from mopidy.internal import jsonrpc
-
-logger = logging.getLogger(__name__)
-
-
-def make_mopidy_app_factory(apps, statics):
-    def mopidy_app_factory(config, core):
-        if not config["http"]["csrf_protection"]:
-            logger.warning(
-                "HTTP Cross-Site Request Forgery protection is disabled"
-            )
-        allowed_origins = {
-            x.lower() for x in config["http"]["allowed_origins"] if x
-        }
-        return [
-            (
-                r"/ws/?",
-                WebSocketHandler,
-                {
-                    "core": core,
-                    "allowed_origins": allowed_origins,
-                    "csrf_protection": config["http"]["csrf_protection"],
-                },
-            ),
-            (
-                r"/rpc",
-                JsonRpcHandler,
-                {
-                    "core": core,
-                    "allowed_origins": allowed_origins,
-                    "csrf_protection": config["http"]["csrf_protection"],
-                },
-            ),
-            (
-                r"/(.+)",
-                StaticFileHandler,
-                {"path": os.path.join(os.path.dirname(__file__), "data")},
-            ),
-            (r"/", ClientListHandler, {"apps": apps, "statics": statics}),
-        ]
-
-    return mopidy_app_factory
-
-
-def make_jsonrpc_wrapper(core_actor):
-    inspector = jsonrpc.JsonRpcInspector(
-        objects={
-            "core.get_uri_schemes": core.Core.get_uri_schemes,
-            "core.get_version": core.Core.get_version,
-            "core.history": core.HistoryController,
-            "core.library": core.LibraryController,
-            "core.mixer": core.MixerController,
-            "core.playback": core.PlaybackController,
-            "core.playlists": core.PlaylistsController,
-            "core.tracklist": core.TracklistController,
-        }
-    )
-    return jsonrpc.JsonRpcWrapper(
-        objects={
-            "core.describe": inspector.describe,
-            "core.get_uri_schemes": core_actor.get_uri_schemes,
-            "core.get_version": core_actor.get_version,
-            "core.history": core_actor.history,
-            "core.library": core_actor.library,
-            "core.mixer": core_actor.mixer,
-            "core.playback": core_actor.playback,
-            "core.playlists": core_actor.playlists,
-            "core.tracklist": core_actor.tracklist,
-        },
-        decoders=[models.model_json_decoder],
-        encoders=[models.ModelJSONEncoder],
-    )
-
-
-def _send_broadcast(client, msg):
-    # We could check for client.ws_connection, but we don't really
-    # care why the broadcast failed, we just want the rest of them
-    # to succeed, so catch everything.
-    try:
-        client.write_message(msg)
-    except Exception as exc:
-        logger.debug(
-            f"Broadcast of WebSocket message to "
-            f"{client.request.remote_ip} failed: {exc}"
-        )
-        # TODO: should this do the same cleanup as the on_message code?
-
-
-class WebSocketHandler(tornado.websocket.WebSocketHandler):
-
-    # XXX This set is shared by all WebSocketHandler objects. This isn't
-    # optimal, but there's currently no use case for having more than one of
-    # these anyway.
-    clients = set()
-
-    @classmethod
-    def broadcast(cls, msg, io_loop):
-        # This can be called from outside the Tornado ioloop, so we need to
-        # safely cross the thread boundary by adding a callback to the loop.
-        for client in cls.clients:
-            # One callback per client to keep time we hold up the loop short
-            io_loop.add_callback(
-                functools.partial(_send_broadcast, client, msg)
-            )
-
-    def initialize(self, core, allowed_origins, csrf_protection):
-        self.jsonrpc = make_jsonrpc_wrapper(core)
-        self.allowed_origins = allowed_origins
-        self.csrf_protection = csrf_protection
-
-    def open(self):
-        self.set_nodelay(True)
-        self.clients.add(self)
-        logger.debug("New WebSocket connection from %s", self.request.remote_ip)
-
-    def on_close(self):
-        self.clients.discard(self)
-        logger.debug(
-            "Closed WebSocket connection from %s", self.request.remote_ip
-        )
-
-    def on_message(self, message):
-        if not message:
-            return
-
-        logger.debug(
-            "Received WebSocket message from %s: %r",
-            self.request.remote_ip,
-            message,
-        )
-
-        try:
-            response = self.jsonrpc.handle_json(
-                tornado.escape.native_str(message)
-            )
-            if response and self.write_message(response):
-                logger.debug(
-                    "Sent WebSocket message to %s: %r",
-                    self.request.remote_ip,
-                    response,
-                )
-        except Exception as exc:
-            logger.error(f"WebSocket request error: {exc}")
-            self.close()
-
-    def check_origin(self, origin):
-        if not self.csrf_protection:
-            return True
-        return check_origin(origin, self.request.headers, self.allowed_origins)
-
-
-def set_mopidy_headers(request_handler):
-    request_handler.set_header("Cache-Control", "no-cache")
-    request_handler.set_header("X-Mopidy-Version", mopidy.__version__.encode())
-
-
-def check_origin(origin, request_headers, allowed_origins):
-    if origin is None:
-        logger.warning("HTTP request denied for missing Origin header")
-        return False
-    allowed_origins.add(request_headers.get("Host"))
-    parsed_origin = urllib.parse.urlparse(origin).netloc.lower()
-    # Some frameworks (e.g. Apache Cordova) use local files. Requests from
-    # these files don't really have a sensible Origin so the browser sets the
-    # header to something like 'file://' or 'null'. This results here in an
-    # empty parsed_origin which we choose to allow.
-    if parsed_origin and parsed_origin not in allowed_origins:
-        logger.warning('HTTP request denied for Origin "%s"', origin)
-        return False
-    return True
-
-
-class JsonRpcHandler(tornado.web.RequestHandler):
-    def initialize(self, core, allowed_origins, csrf_protection):
-        self.jsonrpc = make_jsonrpc_wrapper(core)
-        self.allowed_origins = allowed_origins
-        self.csrf_protection = csrf_protection
-
-    def head(self):
-        self.set_extra_headers()
-        self.finish()
-
-    def post(self):
-        if self.csrf_protection:
-            content_type = self.request.headers.get("Content-Type", "")
-            if content_type != "application/json":
-                self.set_status(415, "Content-Type must be application/json")
-                return
-
-        data = self.request.body
-        if not data:
-            return
-
-        logger.debug(
-            "Received RPC message from %s: %r", self.request.remote_ip, data
-        )
-
-        try:
-            self.set_extra_headers()
-            response = self.jsonrpc.handle_json(tornado.escape.native_str(data))
-            if response and self.write(response):
-                logger.debug(
-                    "Sent RPC message to %s: %r",
-                    self.request.remote_ip,
-                    response,
-                )
-        except Exception as e:
-            logger.error("HTTP JSON-RPC request error: %s", e)
-            self.write_error(500)
-
-    def set_extra_headers(self):
-        set_mopidy_headers(self)
-        self.set_header("Accept", "application/json")
-        self.set_header("Content-Type", "application/json; utf-8")
-
-    def options(self):
-        if self.csrf_protection:
-            origin = self.request.headers.get("Origin")
-            if not check_origin(
-                origin, self.request.headers, self.allowed_origins
-            ):
-                self.set_status(403, f"Access denied for origin {origin}")
-                return
-
-            self.set_header("Access-Control-Allow-Origin", f"{origin}")
-            self.set_header("Access-Control-Allow-Headers", "Content-Type")
-
-        self.set_status(204)
-        self.finish()
-
-
-class ClientListHandler(tornado.web.RequestHandler):
-    def initialize(self, apps, statics):
-        self.apps = apps
-        self.statics = statics
-
-    def get_template_path(self):
-        return os.path.dirname(__file__)
-
-    def get(self):
-        set_mopidy_headers(self)
-
-        names = set()
-        for app in self.apps:
-            names.add(app["name"])
-        for static in self.statics:
-            names.add(static["name"])
-        names.discard("mopidy")
-
-        self.render("data/clients.html", apps=sorted(list(names)))
-
-
-class StaticFileHandler(tornado.web.StaticFileHandler):
-    def set_extra_headers(self, path):
-        set_mopidy_headers(self)
-
-
-class AddSlashHandler(tornado.web.RequestHandler):
-    @tornado.web.addslash
-    def prepare(self):
-        return super().prepare()
diff --git a/venv/lib/python3.7/site-packages/mopidy/httpclient.py b/venv/lib/python3.7/site-packages/mopidy/httpclient.py
deleted file mode 100644
index b3316dd..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/httpclient.py
+++ /dev/null
@@ -1,50 +0,0 @@
-import platform
-
-import mopidy
-
-"Helpers for configuring HTTP clients used in Mopidy extensions."
-
-
-def format_proxy(proxy_config, auth=True):
-    """Convert a Mopidy proxy config to the commonly used proxy string format.
-
-    Outputs ``scheme://host:port``, ``scheme://user:pass@host:port`` or
-    :class:`None` depending on the proxy config provided.
-
-    You can also opt out of getting the basic auth by setting ``auth`` to
-    :class:`False`.
-
-    .. versionadded:: 1.1
-    """
-    if not proxy_config.get("hostname"):
-        return None
-
-    scheme = proxy_config.get("scheme") or "http"
-    username = proxy_config.get("username")
-    password = proxy_config.get("password")
-    hostname = proxy_config["hostname"]
-    port = proxy_config.get("port")
-    if not port or port < 0:
-        port = 80
-
-    if username and password and auth:
-        return f"{scheme}://{username}:{password}@{hostname}:{port}"
-    else:
-        return f"{scheme}://{hostname}:{port}"
-
-
-def format_user_agent(name=None):
-    """Construct a User-Agent suitable for use in client code.
-
-    This will identify use by the provided ``name`` (which should be on the
-    format ``dist_name/version``), Mopidy version and Python version.
-
-    .. versionadded:: 1.1
-    """
-    parts = [
-        f"Mopidy/{mopidy.__version__}",
-        f"{platform.python_implementation()}/{platform.python_version()}",
-    ]
-    if name:
-        parts.insert(0, name)
-    return " ".join(parts)
diff --git a/venv/lib/python3.7/site-packages/mopidy/internal/__init__.py b/venv/lib/python3.7/site-packages/mopidy/internal/__init__.py
deleted file mode 100644
index e69de29..0000000
diff --git a/venv/lib/python3.7/site-packages/mopidy/internal/deprecation.py b/venv/lib/python3.7/site-packages/mopidy/internal/deprecation.py
deleted file mode 100644
index 3d391cb..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/internal/deprecation.py
+++ /dev/null
@@ -1,52 +0,0 @@
-import contextlib
-import re
-import warnings
-
-# Messages used in deprecation warnings are collected here so we can target
-# them easily when ignoring warnings.
-_MESSAGES = {
-    # Deprecated features in core playback:
-    "core.playback.play:tl_track_kwargs": (
-        'playback.play() with "tl_track" argument is pending deprecation use '
-        '"tlid" instead'
-    ),
-    # Deprecated features in core tracklist:
-    "core.tracklist.add:tracks_arg": (
-        'tracklist.add() "tracks" argument is deprecated'
-    ),
-    "core.tracklist.eot_track": (
-        "tracklist.eot_track() is pending deprecation, use "
-        "tracklist.get_eot_tlid()"
-    ),
-    "core.tracklist.next_track": (
-        "tracklist.next_track() is pending deprecation, use "
-        "tracklist.get_next_tlid()"
-    ),
-    "core.tracklist.previous_track": (
-        "tracklist.previous_track() is pending deprecation, use "
-        "tracklist.get_previous_tlid()"
-    ),
-}
-
-
-def warn(msg_id, pending=False):
-    if pending:
-        category = PendingDeprecationWarning
-    else:
-        category = DeprecationWarning
-    warnings.warn(_MESSAGES.get(msg_id, msg_id), category)
-
-
-@contextlib.contextmanager
-def ignore(ids=None):
-    with warnings.catch_warnings():
-        if isinstance(ids, str):
-            ids = [ids]
-
-        if ids:
-            for msg_id in ids:
-                msg = re.escape(_MESSAGES.get(msg_id, msg_id))
-                warnings.filterwarnings("ignore", msg, DeprecationWarning)
-        else:
-            warnings.filterwarnings("ignore", category=DeprecationWarning)
-        yield
diff --git a/venv/lib/python3.7/site-packages/mopidy/internal/deps.py b/venv/lib/python3.7/site-packages/mopidy/internal/deps.py
deleted file mode 100644
index d1a51c1..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/internal/deps.py
+++ /dev/null
@@ -1,189 +0,0 @@
-import functools
-import os
-import platform
-import sys
-
-import pkg_resources
-
-from mopidy.internal import formatting
-from mopidy.internal.gi import Gst, gi
-
-
-def format_dependency_list(adapters=None):
-    if adapters is None:
-        dist_names = {
-            ep.dist.project_name
-            for ep in pkg_resources.iter_entry_points("mopidy.ext")
-            if ep.dist.project_name != "Mopidy"
-        }
-        dist_infos = [
-            functools.partial(pkg_info, dist_name) for dist_name in dist_names
-        ]
-
-        adapters = (
-            [
-                executable_info,
-                platform_info,
-                python_info,
-                functools.partial(pkg_info, "Mopidy", True),
-            ]
-            + dist_infos
-            + [gstreamer_info]
-        )
-
-    return "\n".join([_format_dependency(a()) for a in adapters])
-
-
-def _format_dependency(dep_info):
-    lines = []
-
-    if "version" not in dep_info:
-        lines.append(f"{dep_info['name']}: not found")
-    else:
-        source = f" from {dep_info['path']}" if "path" in dep_info else ""
-        lines.append(f"{dep_info['name']}: {dep_info['version']}{source}")
-
-    if "other" in dep_info:
-        details = formatting.indent(dep_info["other"], places=4)
-        lines.append(f"  Detailed information: {details}")
-
-    if dep_info.get("dependencies", []):
-        for sub_dep_info in dep_info["dependencies"]:
-            sub_dep_lines = _format_dependency(sub_dep_info)
-            lines.append(
-                formatting.indent(sub_dep_lines, places=2, singles=True)
-            )
-
-    return "\n".join(lines)
-
-
-def executable_info():
-    return {
-        "name": "Executable",
-        "version": sys.argv[0],
-    }
-
-
-def platform_info():
-    return {
-        "name": "Platform",
-        "version": platform.platform(),
-    }
-
-
-def python_info():
-    return {
-        "name": "Python",
-        "version": (
-            f"{platform.python_implementation()} {platform.python_version()}"
-        ),
-        "path": os.path.dirname(platform.__file__),
-    }
-
-
-def pkg_info(
-    project_name=None, include_transitive_deps=True, include_extras=False
-):
-    if project_name is None:
-        project_name = "Mopidy"
-    try:
-        distribution = pkg_resources.get_distribution(project_name)
-        extras = include_extras and distribution.extras or []
-        if include_transitive_deps:
-            dependencies = [
-                pkg_info(
-                    d.project_name,
-                    include_transitive_deps=d.project_name != "Mopidy",
-                )
-                for d in distribution.requires(extras)
-            ]
-        else:
-            dependencies = []
-        return {
-            "name": project_name,
-            "version": distribution.version,
-            "path": distribution.location,
-            "dependencies": dependencies,
-        }
-    except pkg_resources.ResolutionError:
-        return {
-            "name": project_name,
-        }
-
-
-def gstreamer_info():
-    other = []
-    other.append(f"Python wrapper: python-gi {gi.__version__}")
-
-    found_elements = []
-    missing_elements = []
-    for name, status in _gstreamer_check_elements():
-        if status:
-            found_elements.append(name)
-        else:
-            missing_elements.append(name)
-
-    other.append("Relevant elements:")
-    other.append("  Found:")
-    for element in found_elements:
-        other.append(f"    {element}")
-    if not found_elements:
-        other.append("    none")
-    other.append("  Not found:")
-    for element in missing_elements:
-        other.append(f"    {element}")
-    if not missing_elements:
-        other.append("    none")
-
-    return {
-        "name": "GStreamer",
-        "version": ".".join(map(str, Gst.version())),
-        "path": os.path.dirname(gi.__file__),
-        "other": "\n".join(other),
-    }
-
-
-def _gstreamer_check_elements():
-    elements_to_check = [
-        # Core playback
-        "uridecodebin",
-        # External HTTP streams
-        "souphttpsrc",
-        # Spotify
-        "appsrc",
-        # Audio sinks
-        "alsasink",
-        "osssink",
-        "oss4sink",
-        "pulsesink",
-        # MP3 encoding and decoding
-        #
-        # One of flump3dec, mad, and mpg123audiodec is required for MP3
-        # playback.
-        "flump3dec",
-        "id3demux",
-        "id3v2mux",
-        "lamemp3enc",
-        "mad",
-        "mpegaudioparse",
-        "mpg123audiodec",
-        # Ogg Vorbis encoding and decoding
-        "vorbisdec",
-        "vorbisenc",
-        "vorbisparse",
-        "oggdemux",
-        "oggmux",
-        "oggparse",
-        # Flac decoding
-        "flacdec",
-        "flacparse",
-        # Shoutcast output
-        "shout2send",
-    ]
-    known_elements = [
-        factory.get_name()
-        for factory in Gst.Registry.get().get_feature_list(Gst.ElementFactory)
-    ]
-    return [
-        (element, element in known_elements) for element in elements_to_check
-    ]
diff --git a/venv/lib/python3.7/site-packages/mopidy/internal/formatting.py b/venv/lib/python3.7/site-packages/mopidy/internal/formatting.py
deleted file mode 100644
index 58220ad..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/internal/formatting.py
+++ /dev/null
@@ -1,28 +0,0 @@
-import re
-import unicodedata
-
-
-def indent(string, places=4, linebreak="\n", singles=False):
-    lines = string.split(linebreak)
-    if not singles and len(lines) == 1:
-        return string
-    for i, line in enumerate(lines):
-        lines[i] = " " * places + line
-    result = linebreak.join(lines)
-    if not singles:
-        result = linebreak + result
-    return result
-
-
-def slugify(value):
-    """
-    Converts to lowercase, removes non-word characters (alphanumerics and
-    underscores) and converts spaces to hyphens. Also strips leading and
-    trailing whitespace.
-
-    This function is based on Django's slugify implementation.
-    """
-    value = unicodedata.normalize("NFKD", value)
-    value = value.encode("ascii", "ignore").decode("ascii")
-    value = re.sub(r"[^\w\s-]", "", value).strip().lower()
-    return re.sub(r"[-\s]+", "-", value)
diff --git a/venv/lib/python3.7/site-packages/mopidy/internal/gi.py b/venv/lib/python3.7/site-packages/mopidy/internal/gi.py
deleted file mode 100644
index 031ba8f..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/internal/gi.py
+++ /dev/null
@@ -1,49 +0,0 @@
-import sys
-import textwrap
-
-try:
-    import gi
-
-    gi.require_version("Gst", "1.0")
-    from gi.repository import GLib, GObject, Gst
-except ImportError:
-    print(
-        textwrap.dedent(
-            """
-        ERROR: A GObject based library was not found.
-
-        Mopidy requires GStreamer to work. GStreamer is a C library with a
-        number of dependencies itself, and cannot be installed with the regular
-        Python tools like pip.
-
-        Please see http://docs.mopidy.com/en/latest/installation/ for
-        instructions on how to install the required dependencies.
-    """
-        )
-    )
-    raise
-else:
-    Gst.init([])
-    gi.require_version("GstPbutils", "1.0")
-    from gi.repository import GstPbutils
-
-GLib.set_prgname("mopidy")
-GLib.set_application_name("Mopidy")
-
-REQUIRED_GST_VERSION = (1, 14, 0)
-REQUIRED_GST_VERSION_DISPLAY = ".".join(map(str, REQUIRED_GST_VERSION))
-
-if Gst.version() < REQUIRED_GST_VERSION:
-    sys.exit(
-        f"ERROR: Mopidy requires GStreamer >= {REQUIRED_GST_VERSION_DISPLAY}, "
-        f"but found {Gst.version_string()}."
-    )
-
-
-__all__ = [
-    "GLib",
-    "GObject",
-    "Gst",
-    "GstPbutils",
-    "gi",
-]
diff --git a/venv/lib/python3.7/site-packages/mopidy/internal/http.py b/venv/lib/python3.7/site-packages/mopidy/internal/http.py
deleted file mode 100644
index 2cedcbe..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/internal/http.py
+++ /dev/null
@@ -1,57 +0,0 @@
-import logging
-import time
-
-import requests
-
-from mopidy import httpclient
-
-logger = logging.getLogger(__name__)
-
-
-def get_requests_session(proxy_config, user_agent):
-    proxy = httpclient.format_proxy(proxy_config)
-    full_user_agent = httpclient.format_user_agent(user_agent)
-
-    session = requests.Session()
-    session.proxies.update({"http": proxy, "https": proxy})
-    session.headers.update({"user-agent": full_user_agent})
-
-    return session
-
-
-def download(session, uri, timeout=1.0, chunk_size=4096):
-    try:
-        response = session.get(uri, stream=True, timeout=timeout)
-    except requests.exceptions.Timeout:
-        logger.warning(
-            "Download of %r failed due to connection timeout after " "%.3fs",
-            uri,
-            timeout,
-        )
-        return None
-    except requests.exceptions.InvalidSchema:
-        logger.warning("Download of %r failed due to unsupported schema", uri)
-        return None
-    except requests.exceptions.RequestException as exc:
-        logger.warning("Download of %r failed: %s", uri, exc)
-        logger.debug("Download exception details", exc_info=True)
-        return None
-
-    content = []
-    deadline = time.time() + timeout
-    for chunk in response.iter_content(chunk_size):
-        content.append(chunk)
-        if time.time() > deadline:
-            logger.warning(
-                "Download of %r failed due to download taking more "
-                "than %.3fs",
-                uri,
-                timeout,
-            )
-            return None
-
-    if not response.ok:
-        logger.warning("Problem downloading %r: %s", uri, response.reason)
-        return None
-
-    return b"".join(content)
diff --git a/venv/lib/python3.7/site-packages/mopidy/internal/jsonrpc.py b/venv/lib/python3.7/site-packages/mopidy/internal/jsonrpc.py
deleted file mode 100644
index c20162a..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/internal/jsonrpc.py
+++ /dev/null
@@ -1,387 +0,0 @@
-import inspect
-import json
-import traceback
-
-import pykka
-
-
-class JsonRpcWrapper:
-
-    """
-    Wrap objects and make them accessible through JSON-RPC 2.0 messaging.
-
-    This class takes responsibility of communicating with the objects and
-    processing of JSON-RPC 2.0 messages. The transport of the messages over
-    HTTP, WebSocket, TCP, or whatever is of no concern to this class.
-
-    The wrapper supports exporting the methods of one or more objects. Either
-    way, the objects must be exported with method name prefixes, called
-    "mounts".
-
-    To expose objects, add them all to the objects mapping. The key in the
-    mapping is used as the object's mounting point in the exposed API::
-
-       jrw = JsonRpcWrapper(objects={
-           'foo': foo,
-           'hello': lambda: 'Hello, world!',
-       })
-
-    This will export the Python callables on the left as the JSON-RPC 2.0
-    method names on the right::
-
-        foo.bar() -> foo.bar
-        foo.baz() -> foo.baz
-        lambda    -> hello
-
-    Only the public methods of the mounted objects, or functions/methods
-    included directly in the mapping, will be exposed.
-
-    If a method returns a :class:`pykka.Future`, the future will be completed
-    and its value unwrapped before the JSON-RPC wrapper returns the response.
-
-    For further details on the JSON-RPC 2.0 spec, see
-    http://www.jsonrpc.org/specification
-
-    :param objects: mapping between mounting points and exposed functions or
-        class instances
-    :type objects: dict
-    :param decoders: object builders to be used by :func`json.loads`
-    :type decoders: list of functions taking a dict and returning a dict
-    :param encoders: object serializers to be used by :func:`json.dumps`
-    :type encoders: list of :class:`json.JSONEncoder` subclasses with the
-        method :meth:`default` implemented
-    """
-
-    def __init__(self, objects, decoders=None, encoders=None):
-        if "" in objects.keys():
-            raise AttributeError(
-                "The empty string is not allowed as an object mount"
-            )
-        self.objects = objects
-        self.decoder = get_combined_json_decoder(decoders or [])
-        self.encoder = get_combined_json_encoder(encoders or [])
-
-    def handle_json(self, request):
-        """
-        Handles an incoming request encoded as a JSON string.
-
-        Returns a response as a JSON string for commands, and :class:`None` for
-        notifications.
-
-        :param request: the serialized JSON-RPC request
-        :type request: string
-        :rtype: string or :class:`None`
-        """
-        try:
-            request = json.loads(request, object_hook=self.decoder)
-        except ValueError:
-            response = JsonRpcParseError().get_response()
-        else:
-            response = self.handle_data(request)
-        if response is None:
-            return None
-        return json.dumps(response, cls=self.encoder)
-
-    def handle_data(self, request):
-        """
-        Handles an incoming request in the form of a Python data structure.
-
-        Returns a Python data structure for commands, or a :class:`None` for
-        notifications.
-
-        :param request: the unserialized JSON-RPC request
-        :type request: dict
-        :rtype: dict, list, or :class:`None`
-        """
-        if isinstance(request, list):
-            return self._handle_batch(request)
-        else:
-            return self._handle_single_request(request)
-
-    def _handle_batch(self, requests):
-        if not requests:
-            return JsonRpcInvalidRequestError(
-                data="Batch list cannot be empty"
-            ).get_response()
-
-        responses = []
-        for request in requests:
-            response = self._handle_single_request(request)
-            if response:
-                responses.append(response)
-
-        return responses or None
-
-    def _handle_single_request(self, request):
-        try:
-            self._validate_request(request)
-            args, kwargs = self._get_params(request)
-        except JsonRpcInvalidRequestError as error:
-            return error.get_response()
-
-        try:
-            method = self._get_method(request["method"])
-
-            try:
-                result = method(*args, **kwargs)
-
-                if self._is_notification(request):
-                    return None
-
-                result = self._unwrap_result(result)
-
-                return {
-                    "jsonrpc": "2.0",
-                    "id": request["id"],
-                    "result": result,
-                }
-            except TypeError as error:
-                raise JsonRpcInvalidParamsError(
-                    data={
-                        "type": error.__class__.__name__,
-                        "message": str(error),
-                        "traceback": traceback.format_exc(),
-                    }
-                )
-            except Exception as error:
-                raise JsonRpcApplicationError(
-                    data={
-                        "type": error.__class__.__name__,
-                        "message": str(error),
-                        "traceback": traceback.format_exc(),
-                    }
-                )
-        except JsonRpcError as error:
-            if self._is_notification(request):
-                return None
-            return error.get_response(request["id"])
-
-    def _validate_request(self, request):
-        if not isinstance(request, dict):
-            raise JsonRpcInvalidRequestError(data="Request must be an object")
-        if "jsonrpc" not in request:
-            raise JsonRpcInvalidRequestError(
-                data="'jsonrpc' member must be included"
-            )
-        if request["jsonrpc"] != "2.0":
-            raise JsonRpcInvalidRequestError(
-                data="'jsonrpc' value must be '2.0'"
-            )
-        if "method" not in request:
-            raise JsonRpcInvalidRequestError(
-                data="'method' member must be included"
-            )
-        if not isinstance(request["method"], str):
-            raise JsonRpcInvalidRequestError(data="'method' must be a string")
-
-    def _get_params(self, request):
-        if "params" not in request:
-            return [], {}
-        params = request["params"]
-        if isinstance(params, list):
-            return params, {}
-        elif isinstance(params, dict):
-            return [], params
-        else:
-            raise JsonRpcInvalidRequestError(
-                data="'params', if given, must be an array or an object"
-            )
-
-    def _get_method(self, method_path):
-        if callable(self.objects.get(method_path, None)):
-            # The mounted object is the callable
-            return self.objects[method_path]
-
-        # The mounted object contains the callable
-
-        if "." not in method_path:
-            raise JsonRpcMethodNotFoundError(
-                data=f"Could not find object mount in method name {method_path!r}"
-            )
-
-        mount, method_name = method_path.rsplit(".", 1)
-
-        if method_name.startswith("_"):
-            raise JsonRpcMethodNotFoundError(
-                data="Private methods are not exported"
-            )
-
-        try:
-            obj = self.objects[mount]
-        except KeyError:
-            raise JsonRpcMethodNotFoundError(
-                data=f"No object found at {mount!r}"
-            )
-
-        try:
-            return getattr(obj, method_name)
-        except AttributeError:
-            raise JsonRpcMethodNotFoundError(
-                data=f"Object mounted at {mount!r} has no member {method_name!r}"
-            )
-
-    def _is_notification(self, request):
-        return "id" not in request
-
-    def _unwrap_result(self, result):
-        if isinstance(result, pykka.Future):
-            result = result.get()
-        return result
-
-
-class JsonRpcError(Exception):
-    code = -32000
-    message = "Unspecified server error"
-
-    def __init__(self, data=None):
-        self.data = data
-
-    def get_response(self, request_id=None):
-        response = {
-            "jsonrpc": "2.0",
-            "id": request_id,
-            "error": {"code": self.code, "message": self.message},
-        }
-        if self.data:
-            response["error"]["data"] = self.data
-        return response
-
-
-class JsonRpcParseError(JsonRpcError):
-    code = -32700
-    message = "Parse error"
-
-
-class JsonRpcInvalidRequestError(JsonRpcError):
-    code = -32600
-    message = "Invalid Request"
-
-
-class JsonRpcMethodNotFoundError(JsonRpcError):
-    code = -32601
-    message = "Method not found"
-
-
-class JsonRpcInvalidParamsError(JsonRpcError):
-    code = -32602
-    message = "Invalid params"
-
-
-class JsonRpcApplicationError(JsonRpcError):
-    code = 0
-    message = "Application error"
-
-
-def get_combined_json_decoder(decoders):
-    def decode(dct):
-        for decoder in decoders:
-            dct = decoder(dct)
-        return dct
-
-    return decode
-
-
-def get_combined_json_encoder(encoders):
-    class JsonRpcEncoder(json.JSONEncoder):
-        def default(self, obj):
-            for encoder in encoders:
-                try:
-                    return encoder().default(obj)
-                except TypeError:
-                    pass  # Try next encoder
-            return json.JSONEncoder.default(self, obj)
-
-    return JsonRpcEncoder
-
-
-class JsonRpcInspector:
-
-    """
-    Inspects a group of classes and functions to create a description of what
-    methods they can expose over JSON-RPC 2.0.
-
-    To inspect one or more classes, add them all to the objects mapping. The
-    key in the mapping is used as the classes' mounting point in the exposed
-    API::
-
-        jri = JsonRpcInspector(objects={
-            'foo': Foo,
-            'hello': lambda: 'Hello, world!',
-        })
-
-    Since the inspector is based on inspecting classes and not instances, it
-    will not include methods added dynamically. The wrapper works with
-    instances, and it will thus export dynamically added methods as well.
-
-    :param objects: mapping between mounts and exposed functions or classes
-    :type objects: dict
-    """
-
-    def __init__(self, objects):
-        if "" in objects.keys():
-            raise AttributeError(
-                "The empty string is not allowed as an object mount"
-            )
-        self.objects = objects
-
-    def describe(self):
-        """
-        Inspects the object and returns a data structure which describes the
-        available properties and methods.
-        """
-        methods = {}
-        for mount, obj in self.objects.items():
-            if inspect.isroutine(obj):
-                methods[mount] = self._describe_method(obj)
-            else:
-                obj_methods = self._get_methods(obj)
-                for name, description in obj_methods.items():
-                    if mount:
-                        name = f"{mount}.{name}"
-                    methods[name] = description
-        return methods
-
-    def _get_methods(self, obj):
-        methods = {}
-        for name, value in inspect.getmembers(obj):
-            if name.startswith("_"):
-                continue
-            if not inspect.isroutine(value):
-                continue
-            method = self._describe_method(value)
-            if method:
-                methods[name] = method
-        return methods
-
-    def _describe_method(self, method):
-        return {
-            "description": inspect.getdoc(method),
-            "params": self._describe_params(method),
-        }
-
-    def _describe_params(self, method):
-        argspec = inspect.getfullargspec(method)
-
-        defaults = argspec.defaults and list(argspec.defaults) or []
-        num_args_without_default = len(argspec.args) - len(defaults)
-        no_defaults = [None] * num_args_without_default
-        defaults = no_defaults + defaults
-
-        params = []
-
-        for arg, _default in zip(argspec.args, defaults):
-            if arg == "self":
-                continue
-            params.append({"name": arg})
-
-        if argspec.defaults:
-            for i, default in enumerate(reversed(argspec.defaults)):
-                params[len(params) - i - 1]["default"] = default
-
-        if argspec.varargs:
-            params.append({"name": argspec.varargs, "varargs": True})
-
-        if argspec.varkw:
-            params.append({"name": argspec.varkw, "kwargs": True})
-
-        return params
diff --git a/venv/lib/python3.7/site-packages/mopidy/internal/log.py b/venv/lib/python3.7/site-packages/mopidy/internal/log.py
deleted file mode 100644
index d084ef4..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/internal/log.py
+++ /dev/null
@@ -1,199 +0,0 @@
-import logging
-import logging.config
-import logging.handlers
-import platform
-
-LOG_LEVELS = {
-    -1: dict(root=logging.ERROR, mopidy=logging.WARNING),
-    0: dict(root=logging.ERROR, mopidy=logging.INFO),
-    1: dict(root=logging.WARNING, mopidy=logging.DEBUG),
-    2: dict(root=logging.INFO, mopidy=logging.DEBUG),
-    3: dict(root=logging.DEBUG, mopidy=logging.DEBUG),
-    4: dict(root=logging.NOTSET, mopidy=logging.NOTSET),
-}
-
-# Custom log level which has even lower priority than DEBUG
-TRACE_LOG_LEVEL = 5
-logging.addLevelName(TRACE_LOG_LEVEL, "TRACE")
-
-logger = logging.getLogger(__name__)
-
-
-class DelayedHandler(logging.Handler):
-    def __init__(self):
-        logging.Handler.__init__(self)
-        self._released = False
-        self._buffer = []
-
-    def handle(self, record):
-        if not self._released:
-            self._buffer.append(record)
-
-    def release(self):
-        self._released = True
-        root = logging.getLogger("")
-        while self._buffer:
-            root.handle(self._buffer.pop(0))
-
-
-_delayed_handler = DelayedHandler()
-
-
-def bootstrap_delayed_logging():
-    root = logging.getLogger("")
-    root.setLevel(logging.NOTSET)
-    root.addHandler(_delayed_handler)
-
-
-def setup_logging(config, base_verbosity_level, args_verbosity_level):
-    logging.captureWarnings(True)
-
-    if config["logging"]["config_file"]:
-        # Logging config from file must be read before other handlers are
-        # added. If not, the other handlers will have no effect.
-        try:
-            path = config["logging"]["config_file"]
-            logging.config.fileConfig(path, disable_existing_loggers=False)
-        except Exception as e:
-            # Catch everything as logging does not specify what can go wrong.
-            logger.error("Loading logging config %r failed. %s", path, e)
-
-    loglevels = config.get("loglevels", {})
-
-    verbosity_level = get_verbosity_level(
-        config, base_verbosity_level, args_verbosity_level
-    )
-    verbosity_filter = VerbosityFilter(verbosity_level, loglevels)
-
-    formatter = logging.Formatter(config["logging"]["format"])
-
-    if config["logging"]["color"]:
-        handler = ColorizingStreamHandler(config.get("logcolors", {}))
-    else:
-        handler = logging.StreamHandler()
-    handler.addFilter(verbosity_filter)
-    handler.setFormatter(formatter)
-
-    logging.getLogger("").addHandler(handler)
-
-    _delayed_handler.release()
-
-
-def get_verbosity_level(config, base_verbosity_level, args_verbosity_level):
-    if args_verbosity_level:
-        result = base_verbosity_level + args_verbosity_level
-    else:
-        result = base_verbosity_level + config["logging"]["verbosity"]
-
-    if result < min(LOG_LEVELS.keys()):
-        result = min(LOG_LEVELS.keys())
-    if result > max(LOG_LEVELS.keys()):
-        result = max(LOG_LEVELS.keys())
-
-    return result
-
-
-class VerbosityFilter(logging.Filter):
-    def __init__(self, verbosity_level, loglevels):
-        self.verbosity_level = verbosity_level
-        self.loglevels = loglevels
-
-    def filter(self, record):
-        for name, required_log_level in self.loglevels.items():
-            if record.name == name or record.name.startswith(name + "."):
-                return record.levelno >= required_log_level
-
-        if record.name.startswith("mopidy"):
-            required_log_level = LOG_LEVELS[self.verbosity_level]["mopidy"]
-        else:
-            required_log_level = LOG_LEVELS[self.verbosity_level]["root"]
-        return record.levelno >= required_log_level
-
-
-#: Available log colors.
-COLORS = [
-    "black",
-    "red",
-    "green",
-    "yellow",
-    "blue",
-    "magenta",
-    "cyan",
-    "white",
-]
-
-
-class ColorizingStreamHandler(logging.StreamHandler):
-
-    """
-    Stream handler which colorizes the log using ANSI escape sequences.
-
-    Does nothing on Windows, which doesn't support ANSI escape sequences.
-
-    This implementation is based upon https://gist.github.com/vsajip/758430,
-    which is:
-
-        Copyright (C) 2010-2012 Vinay Sajip. All rights reserved.
-        Licensed under the new BSD license.
-    """
-
-    # Map logging levels to (background, foreground, bold/intense)
-    level_map = {
-        TRACE_LOG_LEVEL: (None, "blue", False),
-        logging.DEBUG: (None, "blue", False),
-        logging.INFO: (None, "white", False),
-        logging.WARNING: (None, "yellow", False),
-        logging.ERROR: (None, "red", False),
-        logging.CRITICAL: ("red", "white", True),
-    }
-    # Map logger name to foreground colors
-    logger_map = {}
-
-    csi = "\x1b["
-    reset = "\x1b[0m"
-
-    is_windows = platform.system() == "Windows"
-
-    def __init__(self, logger_colors):
-        super().__init__()
-        self.logger_map = logger_colors
-
-    @property
-    def is_tty(self):
-        isatty = getattr(self.stream, "isatty", None)
-        return isatty and isatty()
-
-    def emit(self, record):
-        try:
-            message = self.format(record)
-            self.stream.write(message)
-            self.stream.write(getattr(self, "terminator", "\n"))
-            self.flush()
-        except Exception:
-            self.handleError(record)
-
-    def format(self, record):
-        message = logging.StreamHandler.format(self, record)
-        if not self.is_tty or self.is_windows:
-            return message
-        for name, color in self.logger_map.items():
-            if record.name.startswith(name):
-                return self.colorize(message, fg=color)
-        if record.levelno in self.level_map:
-            bg, fg, bold = self.level_map[record.levelno]
-            return self.colorize(message, bg=bg, fg=fg, bold=bold)
-        return message
-
-    def colorize(self, message, bg=None, fg=None, bold=False):
-        params = []
-        if bg in COLORS:
-            params.append(str(COLORS.index(bg) + 40))
-        if fg in COLORS:
-            params.append(str(COLORS.index(fg) + 30))
-        if bold:
-            params.append("1")
-        if params:
-            message = "".join(
-                (self.csi, ";".join(params), "m", message, self.reset)
-            )
-        return message
diff --git a/venv/lib/python3.7/site-packages/mopidy/internal/models.py b/venv/lib/python3.7/site-packages/mopidy/internal/models.py
deleted file mode 100644
index 77bb3de..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/internal/models.py
+++ /dev/null
@@ -1,142 +0,0 @@
-from mopidy.internal import validation
-from mopidy.models import Ref, TlTrack, fields
-from mopidy.models.immutable import ValidatedImmutableObject
-
-
-class HistoryTrack(ValidatedImmutableObject):
-    """
-    A history track. Wraps a :class:`Ref` and its timestamp.
-
-    :param timestamp: the timestamp
-    :type timestamp: int
-    :param track: the track reference
-    :type track: :class:`Ref`
-    """
-
-    # The timestamp. Read-only.
-    timestamp = fields.Integer()
-
-    # The track reference. Read-only.
-    track = fields.Field(type=Ref)
-
-
-class HistoryState(ValidatedImmutableObject):
-    """
-    State of the history controller.
-    Internally used for save/load state.
-
-    :param history: the track history
-    :type history: list of :class:`HistoryTrack`
-    """
-
-    # The tracks. Read-only.
-    history = fields.Collection(type=HistoryTrack, container=tuple)
-
-
-class MixerState(ValidatedImmutableObject):
-    """
-    State of the mixer controller.
-    Internally used for save/load state.
-
-    :param volume: the volume
-    :type volume: int
-    :param mute: the mute state
-    :type mute: int
-    """
-
-    # The volume. Read-only.
-    volume = fields.Integer(min=0, max=100)
-
-    # The mute state. Read-only.
-    mute = fields.Boolean(default=False)
-
-
-class PlaybackState(ValidatedImmutableObject):
-    """
-    State of the playback controller.
-    Internally used for save/load state.
-
-    :param tlid: current track tlid
-    :type tlid: int
-    :param time_position: play position
-    :type time_position: int
-    :param state: playback state
-    :type state: :class:`validation.PLAYBACK_STATES`
-    """
-
-    # The tlid of current playing track. Read-only.
-    tlid = fields.Integer(min=1)
-
-    # The playback position. Read-only.
-    time_position = fields.Integer(min=0)
-
-    # The playback state. Read-only.
-    state = fields.Field(choices=validation.PLAYBACK_STATES)
-
-
-class TracklistState(ValidatedImmutableObject):
-
-    """
-    State of the tracklist controller.
-    Internally used for save/load state.
-
-    :param repeat: the repeat mode
-    :type repeat: bool
-    :param consume: the consume mode
-    :type consume: bool
-    :param random: the random mode
-    :type random: bool
-    :param single: the single mode
-    :type single: bool
-    :param next_tlid: the id for the next added track
-    :type next_tlid: int
-    :param tl_tracks: the list of tracks
-    :type tl_tracks: list of :class:`TlTrack`
-    """
-
-    # The repeat mode. Read-only.
-    repeat = fields.Boolean()
-
-    # The consume mode. Read-only.
-    consume = fields.Boolean()
-
-    # The random mode. Read-only.
-    random = fields.Boolean()
-
-    # The single mode. Read-only.
-    single = fields.Boolean()
-
-    # The id of the track to play. Read-only.
-    next_tlid = fields.Integer(min=0)
-
-    # The list of tracks. Read-only.
-    tl_tracks = fields.Collection(type=TlTrack, container=tuple)
-
-
-class CoreState(ValidatedImmutableObject):
-
-    """
-    State of all Core controller.
-    Internally used for save/load state.
-
-    :param history: State of the history controller
-    :type history: :class:`HistorState`
-    :param mixer: State of the mixer controller
-    :type mixer: :class:`MixerState`
-    :param playback: State of the playback controller
-    :type playback: :class:`PlaybackState`
-    :param tracklist: State of the tracklist controller
-    :type tracklist: :class:`TracklistState`
-    """
-
-    # State of the history controller.
-    history = fields.Field(type=HistoryState)
-
-    # State of the mixer controller.
-    mixer = fields.Field(type=MixerState)
-
-    # State of the playback controller.
-    playback = fields.Field(type=PlaybackState)
-
-    # State of the tracklist controller.
-    tracklist = fields.Field(type=TracklistState)
diff --git a/venv/lib/python3.7/site-packages/mopidy/internal/network.py b/venv/lib/python3.7/site-packages/mopidy/internal/network.py
deleted file mode 100644
index 2667be4..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/internal/network.py
+++ /dev/null
@@ -1,31 +0,0 @@
-import logging
-import re
-import socket
-
-logger = logging.getLogger(__name__)
-
-
-def try_ipv6_socket():
-    """Determine if system really supports IPv6"""
-    if not socket.has_ipv6:
-        return False
-    try:
-        socket.socket(socket.AF_INET6).close()
-        return True
-    except OSError as exc:
-        logger.debug(
-            f"Platform supports IPv6, but socket creation failed, "
-            f"disabling: {exc}"
-        )
-    return False
-
-
-#: Boolean value that indicates if creating an IPv6 socket will succeed.
-has_ipv6 = try_ipv6_socket()
-
-
-def format_hostname(hostname):
-    """Format hostname for display."""
-    if has_ipv6 and re.match(r"\d+.\d+.\d+.\d+", hostname) is not None:
-        hostname = f"::ffff:{hostname}"
-    return hostname
diff --git a/venv/lib/python3.7/site-packages/mopidy/internal/path.py b/venv/lib/python3.7/site-packages/mopidy/internal/path.py
deleted file mode 100644
index 9493592..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/internal/path.py
+++ /dev/null
@@ -1,104 +0,0 @@
-import logging
-import pathlib
-import re
-import urllib
-
-from mopidy.internal import xdg
-
-logger = logging.getLogger(__name__)
-
-
-XDG_DIRS = xdg.get_dirs()
-
-
-def get_or_create_dir(dir_path):
-    dir_path = expand_path(dir_path)
-    if dir_path.is_file():
-        raise OSError(
-            f"A file with the same name as the desired dir, "
-            f"{dir_path!r}, already exists."
-        )
-    elif not dir_path.is_dir():
-        logger.info(f"Creating dir {dir_path.as_uri()}")
-        dir_path.mkdir(mode=0o755, parents=True)
-    return dir_path
-
-
-def get_or_create_file(file_path, mkdir=True, content=None):
-    file_path = expand_path(file_path)
-    if isinstance(content, str):
-        content = content.encode()
-    if mkdir:
-        get_or_create_dir(file_path.parent)
-    if not file_path.is_file():
-        logger.info(f"Creating file {file_path.as_uri()}")
-        file_path.touch(exist_ok=False)
-        if content is not None:
-            file_path.write_bytes(content)
-    return file_path
-
-
-def get_unix_socket_path(socket_path):
-    match = re.search("^unix:(.*)", socket_path)
-    if not match:
-        return None
-    return match.group(1)
-
-
-def path_to_uri(path):
-    """
-    Convert OS specific path to file:// URI.
-
-    Accepts either unicode strings or bytestrings. The encoding of any
-    bytestring will be maintained so that :func:`uri_to_path` can return the
-    same bytestring.
-
-    Returns a file:// URI as an unicode string.
-    """
-    return pathlib.Path(path).as_uri()
-
-
-def uri_to_path(uri):
-    """
-    Convert an URI to a OS specific path.
-    """
-    bytes_path = urllib.parse.unquote_to_bytes(urllib.parse.urlsplit(uri).path)
-    unicode_path = bytes_path.decode(errors="surrogateescape")
-    return pathlib.Path(unicode_path)
-
-
-def expand_path(path):
-    if isinstance(path, bytes):
-        path = path.decode(errors="surrogateescape")
-    path = str(pathlib.Path(path))
-
-    for xdg_var, xdg_dir in XDG_DIRS.items():
-        path = path.replace("$" + xdg_var, str(xdg_dir))
-    if "$" in path:
-        return None
-
-    return pathlib.Path(path).expanduser().resolve()
-
-
-def is_path_inside_base_dir(path, base_path):
-    if isinstance(path, bytes):
-        path = path.decode(errors="surrogateescape")
-    if isinstance(base_path, bytes):
-        base_path = base_path.decode(errors="surrogateescape")
-
-    path = pathlib.Path(path).resolve()
-    base_path = pathlib.Path(base_path).resolve()
-
-    if path.is_file():
-        # Use dir of file for prefix comparision, so we don't accept
-        # /tmp/foo.m3u as being inside /tmp/foo, simply because they have a
-        # common prefix, /tmp/foo, which matches the base path, /tmp/foo.
-        path = path.parent
-
-    # Check if dir of file is the base path or a subdir
-    try:
-        path.relative_to(base_path)
-    except ValueError:
-        return False
-    else:
-        return True
diff --git a/venv/lib/python3.7/site-packages/mopidy/internal/playlists.py b/venv/lib/python3.7/site-packages/mopidy/internal/playlists.py
deleted file mode 100644
index 8f2d202..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/internal/playlists.py
+++ /dev/null
@@ -1,137 +0,0 @@
-import configparser
-import io
-
-from mopidy.internal import validation
-
-import xml.etree.ElementTree as elementtree  # noqa: N813
-
-
-def parse(data):
-    handlers = {
-        detect_extm3u_header: parse_extm3u,
-        detect_pls_header: parse_pls,
-        detect_asx_header: parse_asx,
-        detect_xspf_header: parse_xspf,
-    }
-    for detector, parser in handlers.items():
-        if detector(data):
-            return list(parser(data))
-    return list(parse_urilist(data))  # Fallback
-
-
-def detect_extm3u_header(data):
-    return data[0:7].upper() == b"#EXTM3U"
-
-
-def detect_pls_header(data):
-    return data[0:10].lower() == b"[playlist]"
-
-
-def detect_xspf_header(data):
-    data = data[0:150]
-    if b"xspf" not in data.lower():
-        return False
-
-    try:
-        data = io.BytesIO(data)
-        for _event, element in elementtree.iterparse(data, events=["start"]):
-            return element.tag.lower() == "{http://xspf.org/ns/0/}playlist"
-    except elementtree.ParseError:
-        pass
-    return False
-
-
-def detect_asx_header(data):
-    data = data[0:50]
-    if b"asx" not in data.lower():
-        return False
-
-    try:
-        data = io.BytesIO(data)
-        for _event, element in elementtree.iterparse(data, events=["start"]):
-            return element.tag.lower() == "asx"
-    except elementtree.ParseError:
-        pass
-    return False
-
-
-def parse_extm3u(data):
-    # TODO: convert non URIs to file URIs.
-    found_header = False
-    for line in data.splitlines():
-        if found_header or line.startswith(b"#EXTM3U"):
-            found_header = True
-        else:
-            continue
-
-        if not line.strip() or line.startswith(b"#"):
-            continue
-
-        try:
-            line = line.decode()
-        except UnicodeDecodeError:
-            continue
-
-        yield line.strip()
-
-
-def parse_pls(data):
-    # TODO: convert non URIs to file URIs.
-    try:
-        cp = configparser.RawConfigParser()
-        cp.read_string(data.decode())
-    except configparser.Error:
-        return
-
-    for section in cp.sections():
-        if section.lower() != "playlist":
-            continue
-        for i in range(cp.getint(section, "numberofentries")):
-            yield cp.get(section, f"file{i + 1}").strip("\"'")
-
-
-def parse_xspf(data):
-    try:
-        # Last element will be root.
-        for _event, element in elementtree.iterparse(io.BytesIO(data)):
-            element.tag = element.tag.lower()  # normalize
-    except elementtree.ParseError:
-        return
-
-    ns = "http://xspf.org/ns/0/"
-    path = f"{{{ns}}}tracklist/{{{ns}}}track"
-    for track in element.iterfind(path):
-        yield track.findtext(f"{{{ns}}}location")
-
-
-def parse_asx(data):
-    try:
-        # Last element will be root.
-        for _event, element in elementtree.iterparse(io.BytesIO(data)):
-            element.tag = element.tag.lower()  # normalize
-    except elementtree.ParseError:
-        return
-
-    for ref in element.findall("entry/ref[@href]"):
-        yield ref.get("href", "").strip()
-
-    for entry in element.findall("entry[@href]"):
-        yield entry.get("href", "").strip()
-
-
-def parse_urilist(data):
-    for line in data.splitlines():
-        if not line.strip() or line.startswith(b"#"):
-            continue
-
-        try:
-            line = line.decode()
-        except UnicodeDecodeError:
-            continue
-
-        try:
-            validation.check_uri(line)
-        except ValueError:
-            continue
-
-        yield line.strip()
diff --git a/venv/lib/python3.7/site-packages/mopidy/internal/process.py b/venv/lib/python3.7/site-packages/mopidy/internal/process.py
deleted file mode 100644
index 3e976e7..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/internal/process.py
+++ /dev/null
@@ -1,53 +0,0 @@
-import logging
-import threading
-
-import pykka
-
-import _thread
-
-logger = logging.getLogger(__name__)
-
-
-def exit_process():
-    logger.debug("Interrupting main...")
-    _thread.interrupt_main()
-    logger.debug("Interrupted main")
-
-
-def sigterm_handler(signum, frame):
-    """A :mod:`signal` handler which will exit the program on signal.
-
-    This function is not called when the process' main thread is running a GLib
-    mainloop. In that case, the GLib mainloop must listen for SIGTERM signals
-    and quit itself.
-
-    For Mopidy subcommands that does not run the GLib mainloop, this handler
-    ensures a proper shutdown of the process on SIGTERM.
-    """
-    logger.info("Got SIGTERM signal. Exiting...")
-    exit_process()
-
-
-def stop_actors_by_class(klass):
-    actors = pykka.ActorRegistry.get_by_class(klass)
-    logger.debug("Stopping %d instance(s) of %s", len(actors), klass.__name__)
-    for actor in actors:
-        actor.stop()
-
-
-def stop_remaining_actors():
-    num_actors = len(pykka.ActorRegistry.get_all())
-    while num_actors:
-        logger.error(
-            "There are actor threads still running, this is probably a bug"
-        )
-        logger.debug(
-            "Seeing %d actor and %d non-actor thread(s): %s",
-            num_actors,
-            threading.active_count() - num_actors,
-            ", ".join([t.name for t in threading.enumerate()]),
-        )
-        logger.debug("Stopping %d actor(s)...", num_actors)
-        pykka.ActorRegistry.stop_all()
-        num_actors = len(pykka.ActorRegistry.get_all())
-    logger.debug("All actors stopped.")
diff --git a/venv/lib/python3.7/site-packages/mopidy/internal/storage.py b/venv/lib/python3.7/site-packages/mopidy/internal/storage.py
deleted file mode 100644
index b723de9..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/internal/storage.py
+++ /dev/null
@@ -1,59 +0,0 @@
-import gzip
-import json
-import logging
-import pathlib
-import tempfile
-
-from mopidy import models
-
-logger = logging.getLogger(__name__)
-
-
-def load(path):
-    """
-    Deserialize data from file.
-
-    :param path: full path to import file
-    :type path: pathlib.Path
-    :return: deserialized data
-    :rtype: dict
-    """
-
-    # TODO: raise an exception in case of error?
-    if not path.is_file():
-        logger.info("File does not exist: %s", path)
-        return {}
-    try:
-        with gzip.open(str(path), "rb") as fp:
-            return json.load(fp, object_hook=models.model_json_decoder)
-    except (OSError, ValueError) as exc:
-        logger.warning(f"Loading JSON failed: {exc}")
-        return {}
-
-
-def dump(path, data):
-    """
-    Serialize data to file.
-
-    :param path: full path to export file
-    :type path: pathlib.Path
-    :param data: dictionary containing data to save
-    :type data: dict
-    """
-
-    # TODO: cleanup directory/basename.* files.
-    tmp = tempfile.NamedTemporaryFile(
-        prefix=path.name + ".", dir=str(path.parent), delete=False
-    )
-    tmp_path = pathlib.Path(tmp.name)
-
-    try:
-        data_string = json.dumps(
-            data, cls=models.ModelJSONEncoder, indent=2, separators=(",", ": ")
-        )
-        with gzip.GzipFile(fileobj=tmp, mode="wb") as fp:
-            fp.write(data_string.encode())
-        tmp_path.rename(path)
-    finally:
-        if tmp_path.exists():
-            tmp_path.unlink()
diff --git a/venv/lib/python3.7/site-packages/mopidy/internal/timer.py b/venv/lib/python3.7/site-packages/mopidy/internal/timer.py
deleted file mode 100644
index fb2d104..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/internal/timer.py
+++ /dev/null
@@ -1,14 +0,0 @@
-import contextlib
-import logging
-import time
-
-from mopidy.internal import log
-
-logger = logging.getLogger(__name__)
-
-
-@contextlib.contextmanager
-def time_logger(name, level=log.TRACE_LOG_LEVEL):
-    start = time.time()
-    yield
-    logger.log(level, "%s took %dms", name, (time.time() - start) * 1000)
diff --git a/venv/lib/python3.7/site-packages/mopidy/internal/validation.py b/venv/lib/python3.7/site-packages/mopidy/internal/validation.py
deleted file mode 100644
index 82feed1..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/internal/validation.py
+++ /dev/null
@@ -1,133 +0,0 @@
-import urllib
-from collections.abc import Iterable, Mapping
-
-from mopidy import exceptions
-
-PLAYBACK_STATES = {"paused", "stopped", "playing"}
-
-SEARCH_FIELDS = {
-    "uri",
-    "track_name",
-    "album",
-    "artist",
-    "albumartist",
-    "composer",
-    "performer",
-    "track_no",
-    "genre",
-    "date",
-    "comment",
-    "any",
-}
-
-PLAYLIST_FIELDS = {"uri", "name"}  # TODO: add length and last_modified?
-
-TRACKLIST_FIELDS = {  # TODO: add bitrate, length, disc_no, track_no, modified?
-    "uri",
-    "name",
-    "genre",
-    "date",
-    "comment",
-    "musicbrainz_id",
-}
-
-DISTINCT_FIELDS = {
-    "track",
-    "artist",
-    "albumartist",
-    "album",
-    "composer",
-    "performer",
-    "date",
-    "genre",
-}
-
-
-# TODO: _check_iterable(check, msg, **kwargs) + [check(a) for a in arg]?
-def _check_iterable(arg, msg, **kwargs):
-    """Ensure we have an iterable which is not a string or an iterator"""
-    if isinstance(arg, str):
-        raise exceptions.ValidationError(msg.format(arg=arg, **kwargs))
-    elif not isinstance(arg, Iterable):
-        raise exceptions.ValidationError(msg.format(arg=arg, **kwargs))
-    elif iter(arg) is iter(arg):
-        raise exceptions.ValidationError(msg.format(arg=arg, **kwargs))
-
-
-def check_choice(arg, choices, msg="Expected one of {choices}, not {arg!r}"):
-    if arg not in choices:
-        raise exceptions.ValidationError(
-            msg.format(arg=arg, choices=tuple(choices))
-        )
-
-
-def check_boolean(arg, msg="Expected a boolean, not {arg!r}"):
-    check_instance(arg, bool, msg=msg)
-
-
-def check_instance(arg, cls, msg="Expected a {name} instance, not {arg!r}"):
-    if not isinstance(arg, cls):
-        raise exceptions.ValidationError(msg.format(arg=arg, name=cls.__name__))
-
-
-def check_instances(arg, cls, msg="Expected a list of {name}, not {arg!r}"):
-    _check_iterable(arg, msg, name=cls.__name__)
-    if not all(isinstance(instance, cls) for instance in arg):
-        raise exceptions.ValidationError(msg.format(arg=arg, name=cls.__name__))
-
-
-def check_integer(arg, min=None, max=None):
-    if not isinstance(arg, int):
-        raise exceptions.ValidationError(f"Expected an integer, not {arg!r}")
-    elif min is not None and arg < min:
-        raise exceptions.ValidationError(
-            f"Expected number larger or equal to {min}, not {arg!r}"
-        )
-    elif max is not None and arg > max:
-        raise exceptions.ValidationError(
-            f"Expected number smaller or equal to {max}, not {arg!r}"
-        )
-
-
-def check_query(arg, fields=SEARCH_FIELDS, list_values=True):
-    # TODO: normalize name  -> track_name
-    # TODO: normalize value -> [value]
-    # TODO: normalize blank -> [] or just remove field?
-    # TODO: remove list_values?
-
-    if not isinstance(arg, Mapping):
-        raise exceptions.ValidationError(
-            f"Expected a query dictionary, not {arg!r}"
-        )
-
-    for key, value in arg.items():
-        check_choice(
-            key,
-            fields,
-            msg="Expected query field to be one of " "{choices}, not {arg!r}",
-        )
-        if list_values:
-            msg = 'Expected "{key}" to be list of strings, not {arg!r}'
-            _check_iterable(value, msg, key=key)
-            [_check_query_value(key, v, msg) for v in value]
-        else:
-            _check_query_value(
-                key, value, 'Expected "{key}" to be a string, not {arg!r}'
-            )
-
-
-def _check_query_value(key, arg, msg):
-    if not isinstance(arg, str) or not arg.strip():
-        raise exceptions.ValidationError(msg.format(arg=arg, key=key))
-
-
-def check_uri(arg, msg="Expected a valid URI, not {arg!r}"):
-    if not isinstance(arg, str):
-        raise exceptions.ValidationError(msg.format(arg=arg))
-    elif urllib.parse.urlparse(arg).scheme == "":
-        raise exceptions.ValidationError(msg.format(arg=arg))
-
-
-def check_uris(arg, msg="Expected a list of URIs, not {arg!r}"):
-    _check_iterable(arg, msg)
-    [check_uri(a, msg) for a in arg]
diff --git a/venv/lib/python3.7/site-packages/mopidy/internal/versioning.py b/venv/lib/python3.7/site-packages/mopidy/internal/versioning.py
deleted file mode 100644
index c9406ee..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/internal/versioning.py
+++ /dev/null
@@ -1,29 +0,0 @@
-import os
-import subprocess
-
-import mopidy
-
-
-def get_version():
-    try:
-        return get_git_version()
-    except OSError:
-        return mopidy.__version__
-
-
-def get_git_version():
-    project_dir = os.path.abspath(
-        os.path.join(os.path.dirname(mopidy.__file__), "..")
-    )
-    process = subprocess.Popen(
-        ["git", "describe"],
-        stdout=subprocess.PIPE,
-        stderr=subprocess.PIPE,
-        cwd=project_dir,
-    )
-    if process.wait() != 0:
-        raise OSError('Execution of "git describe" failed')
-    version = process.stdout.read().strip().decode()
-    if version.startswith("v"):
-        version = version[1:]
-    return version
diff --git a/venv/lib/python3.7/site-packages/mopidy/internal/xdg.py b/venv/lib/python3.7/site-packages/mopidy/internal/xdg.py
deleted file mode 100644
index 66e732a..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/internal/xdg.py
+++ /dev/null
@@ -1,68 +0,0 @@
-import configparser
-import os
-import pathlib
-
-
-def get_dirs():
-    """Returns a dict of all the known XDG Base Directories for the current user.
-
-    The keys ``XDG_CACHE_DIR``, ``XDG_CONFIG_DIR``, and ``XDG_DATA_DIR`` is
-    always available.
-
-    Additional keys, like ``XDG_MUSIC_DIR``, may be available if the
-    ``$XDG_CONFIG_DIR/user-dirs.dirs`` file exists and is parseable.
-
-    See http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html
-    for the XDG Base Directory specification.
-    """
-
-    dirs = {
-        "XDG_CACHE_DIR": pathlib.Path(
-            os.getenv("XDG_CACHE_HOME", "~/.cache")
-        ).expanduser(),
-        "XDG_CONFIG_DIR": pathlib.Path(
-            os.getenv("XDG_CONFIG_HOME", "~/.config")
-        ).expanduser(),
-        "XDG_DATA_DIR": pathlib.Path(
-            os.getenv("XDG_DATA_HOME", "~/.local/share")
-        ).expanduser(),
-    }
-
-    dirs.update(_get_user_dirs(dirs["XDG_CONFIG_DIR"]))
-
-    return dirs
-
-
-def _get_user_dirs(xdg_config_dir):
-    """Returns a dict of XDG dirs read from
-    ``$XDG_CONFIG_HOME/user-dirs.dirs``.
-
-    This is used at import time for most users of :mod:`mopidy`. By rolling our
-    own implementation instead of using :meth:`glib.get_user_special_dir` we
-    make it possible for many extensions to run their test suites, which are
-    importing parts of :mod:`mopidy`, in a virtualenv with global site-packages
-    disabled, and thus no :mod:`glib` available.
-    """
-
-    dirs_file = xdg_config_dir / "user-dirs.dirs"
-
-    if not dirs_file.exists():
-        return {}
-
-    data = dirs_file.read_bytes()
-    data = b"[XDG_USER_DIRS]\n" + data
-    data = data.replace(b"$HOME", bytes(pathlib.Path.home()))
-    data = data.replace(b'"', b"")
-
-    config = configparser.RawConfigParser()
-    config.read_string(data.decode())
-
-    result = {}
-    for k, v in config.items("XDG_USER_DIRS"):
-        if v is None:
-            continue
-        if isinstance(k, bytes):
-            k = k.decode()
-        result[k.upper()] = pathlib.Path(v).resolve()
-
-    return result
diff --git a/venv/lib/python3.7/site-packages/mopidy/listener.py b/venv/lib/python3.7/site-packages/mopidy/listener.py
deleted file mode 100644
index a302e9a..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/listener.py
+++ /dev/null
@@ -1,45 +0,0 @@
-import logging
-
-import pykka
-from pykka.messages import ProxyCall
-
-logger = logging.getLogger(__name__)
-
-
-def send(cls, event, **kwargs):
-    listeners = pykka.ActorRegistry.get_by_class(cls)
-    logger.debug("Sending %s to %s: %s", event, cls.__name__, kwargs)
-    for listener in listeners:
-        # Save time by calling methods on Pykka actor without creating a
-        # throwaway actor proxy.
-        #
-        # Because we use `.tell()` there is no return channel for any errors,
-        # so Pykka logs them immediately. The alternative would be to use
-        # `.ask()` and `.get()` the returned futures to block for the listeners
-        # to react and return their exceptions to us. Since emitting events in
-        # practise is making calls upwards in the stack, blocking here would
-        # quickly deadlock.
-        listener.tell(
-            ProxyCall(attr_path=["on_event"], args=[event], kwargs=kwargs,)
-        )
-
-
-class Listener:
-    def on_event(self, event, **kwargs):
-        """
-        Called on all events.
-
-        *MAY* be implemented by actor. By default, this method forwards the
-        event to the specific event methods.
-
-        :param event: the event name
-        :type event: string
-        :param kwargs: any other arguments to the specific event handlers
-        """
-        try:
-            getattr(self, event)(**kwargs)
-        except Exception:
-            # Ensure we don't crash the actor due to "bad" events.
-            logger.exception(
-                "Triggering event failed: %s(%s)", event, ", ".join(kwargs)
-            )
diff --git a/venv/lib/python3.7/site-packages/mopidy/local.py b/venv/lib/python3.7/site-packages/mopidy/local.py
deleted file mode 100644
index 7bd95dd..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/local.py
+++ /dev/null
@@ -1,13 +0,0 @@
-# XXX This module is only here to ease the migration from Mopidy-Local being
-# bundled with Mopidy to being an independent extension. This file should
-# probably be removed before Mopidy 3.0 final ships.
-
-import warnings
-
-from mopidy_local import *  # noqa
-
-warnings.warn(
-    "Mopidy-Local has been moved to its own project. "
-    "Update any imports from `mopidy.local` to use `mopidy_local` instead.",
-    DeprecationWarning,
-)
diff --git a/venv/lib/python3.7/site-packages/mopidy/m3u/__init__.py b/venv/lib/python3.7/site-packages/mopidy/m3u/__init__.py
deleted file mode 100644
index ab6f755..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/m3u/__init__.py
+++ /dev/null
@@ -1,31 +0,0 @@
-import logging
-import os
-
-import mopidy
-from mopidy import config, ext
-
-logger = logging.getLogger(__name__)
-
-
-class Extension(ext.Extension):
-
-    dist_name = "Mopidy-M3U"
-    ext_name = "m3u"
-    version = mopidy.__version__
-
-    def get_default_config(self):
-        conf_file = os.path.join(os.path.dirname(__file__), "ext.conf")
-        return config.read(conf_file)
-
-    def get_config_schema(self):
-        schema = super().get_config_schema()
-        schema["base_dir"] = config.Path(optional=True)
-        schema["default_encoding"] = config.String()
-        schema["default_extension"] = config.String(choices=[".m3u", ".m3u8"])
-        schema["playlists_dir"] = config.Path(optional=True)
-        return schema
-
-    def setup(self, registry):
-        from .backend import M3UBackend
-
-        registry.add("backend", M3UBackend)
diff --git a/venv/lib/python3.7/site-packages/mopidy/m3u/backend.py b/venv/lib/python3.7/site-packages/mopidy/m3u/backend.py
deleted file mode 100644
index 7047852..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/m3u/backend.py
+++ /dev/null
@@ -1,13 +0,0 @@
-import pykka
-
-from mopidy import backend
-
-from . import playlists
-
-
-class M3UBackend(pykka.ThreadingActor, backend.Backend):
-    uri_schemes = ["m3u"]
-
-    def __init__(self, config, audio):
-        super().__init__()
-        self.playlists = playlists.M3UPlaylistsProvider(self, config)
diff --git a/venv/lib/python3.7/site-packages/mopidy/m3u/ext.conf b/venv/lib/python3.7/site-packages/mopidy/m3u/ext.conf
deleted file mode 100644
index 16291c8..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/m3u/ext.conf
+++ /dev/null
@@ -1,6 +0,0 @@
-[m3u]
-enabled = true
-playlists_dir =
-base_dir = $XDG_MUSIC_DIR
-default_encoding = latin-1
-default_extension = .m3u8
diff --git a/venv/lib/python3.7/site-packages/mopidy/m3u/playlists.py b/venv/lib/python3.7/site-packages/mopidy/m3u/playlists.py
deleted file mode 100644
index 6f89d95..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/m3u/playlists.py
+++ /dev/null
@@ -1,174 +0,0 @@
-import contextlib
-import locale
-import logging
-import operator
-import os
-import pathlib
-import tempfile
-
-from mopidy import backend
-from mopidy.internal import path
-
-from . import Extension, translator
-
-logger = logging.getLogger(__name__)
-
-
-def log_environment_error(message, error):
-    if isinstance(error.strerror, bytes):
-        strerror = error.strerror.decode(locale.getpreferredencoding())
-    else:
-        strerror = error.strerror
-    logger.error("%s: %s", message, strerror)
-
-
-@contextlib.contextmanager
-def replace(path, mode="w+b", encoding=None, errors=None):
-    (fd, tempname) = tempfile.mkstemp(dir=str(path.parent))
-    tempname = pathlib.Path(tempname)
-    try:
-        fp = open(fd, mode, encoding=encoding, errors=errors)
-    except Exception:
-        tempname.unlink()
-        os.close(fd)
-        raise
-    try:
-        yield fp
-        fp.flush()
-        os.fsync(fd)
-        tempname.rename(path)
-    except Exception:
-        tempname.unlink()
-        raise
-    finally:
-        fp.close()
-
-
-class M3UPlaylistsProvider(backend.PlaylistsProvider):
-    def __init__(self, backend, config):
-        super().__init__(backend)
-
-        ext_config = config[Extension.ext_name]
-        if ext_config["playlists_dir"] is None:
-            self._playlists_dir = Extension.get_data_dir(config)
-        else:
-            self._playlists_dir = path.expand_path(ext_config["playlists_dir"])
-        if ext_config["base_dir"] is None:
-            self._base_dir = self._playlists_dir
-        else:
-            self._base_dir = path.expand_path(ext_config["base_dir"])
-        self._default_encoding = ext_config["default_encoding"]
-        self._default_extension = ext_config["default_extension"]
-
-    def as_list(self):
-        result = []
-        for entry in self._playlists_dir.iterdir():
-            if entry.suffix not in [".m3u", ".m3u8"]:
-                continue
-            elif not entry.is_file():
-                continue
-            else:
-                playlist_path = entry.relative_to(self._playlists_dir)
-                result.append(translator.path_to_ref(playlist_path))
-        result.sort(key=operator.attrgetter("name"))
-        return result
-
-    def create(self, name):
-        path = translator.path_from_name(name.strip(), self._default_extension)
-        try:
-            with self._open(path, "w"):
-                pass
-            mtime = self._abspath(path).stat().st_mtime
-        except OSError as e:
-            log_environment_error(f"Error creating playlist {name!r}", e)
-        else:
-            return translator.playlist(path, [], mtime)
-
-    def delete(self, uri):
-        path = translator.uri_to_path(uri)
-        if not self._is_in_basedir(path):
-            logger.debug("Ignoring path outside playlist dir: %s", uri)
-            return False
-        try:
-            self._abspath(path).unlink()
-        except OSError as e:
-            log_environment_error(f"Error deleting playlist {uri!r}", e)
-            return False
-        else:
-            return True
-
-    def get_items(self, uri):
-        path = translator.uri_to_path(uri)
-        if not self._is_in_basedir(path):
-            logger.debug("Ignoring path outside playlist dir: %s", uri)
-            return None
-        try:
-            with self._open(path, "r") as fp:
-                items = translator.load_items(fp, self._base_dir)
-        except OSError as e:
-            log_environment_error(f"Error reading playlist {uri!r}", e)
-        else:
-            return items
-
-    def lookup(self, uri):
-        path = translator.uri_to_path(uri)
-        if not self._is_in_basedir(path):
-            logger.debug("Ignoring path outside playlist dir: %s", uri)
-            return None
-        try:
-            with self._open(path, "r") as fp:
-                items = translator.load_items(fp, self._base_dir)
-            mtime = self._abspath(path).stat().st_mtime
-        except OSError as e:
-            log_environment_error(f"Error reading playlist {uri!r}", e)
-        else:
-            return translator.playlist(path, items, mtime)
-
-    def refresh(self):
-        pass  # nothing to do
-
-    def save(self, playlist):
-        path = translator.uri_to_path(playlist.uri)
-        if not self._is_in_basedir(path):
-            logger.debug("Ignoring path outside playlist dir: %s", playlist.uri)
-            return None
-        name = translator.name_from_path(path)
-        try:
-            with self._open(path, "w") as fp:
-                translator.dump_items(playlist.tracks, fp)
-            if playlist.name and playlist.name != name:
-                orig_path = path
-                path = translator.path_from_name(playlist.name.strip())
-                path = path.with_suffix(orig_path.suffix)
-                self._abspath(orig_path).rename(self._abspath(path))
-            mtime = self._abspath(path).stat().st_mtime
-        except OSError as e:
-            log_environment_error(f"Error saving playlist {playlist.uri!r}", e)
-        else:
-            return translator.playlist(path, playlist.tracks, mtime)
-
-    def _abspath(self, path):
-        if not path.is_absolute():
-            return self._playlists_dir / path
-        else:
-            return path
-
-    def _is_in_basedir(self, local_path):
-        local_path = self._abspath(local_path)
-        return path.is_path_inside_base_dir(local_path, self._playlists_dir)
-
-    def _open(self, path, mode="r"):
-        if path.suffix == ".m3u8":
-            encoding = "utf-8"
-        else:
-            encoding = self._default_encoding
-        if not path.is_absolute():
-            path = self._abspath(path)
-        if not self._is_in_basedir(path):
-            raise Exception(
-                f"Path {path!r} is not inside playlist dir {self._playlist_dir!r}"
-            )
-        if "w" in mode:
-            return replace(path, mode, encoding=encoding, errors="replace")
-        else:
-            return path.open(mode, encoding=encoding, errors="replace")
diff --git a/venv/lib/python3.7/site-packages/mopidy/m3u/translator.py b/venv/lib/python3.7/site-packages/mopidy/m3u/translator.py
deleted file mode 100644
index 31afcf3..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/m3u/translator.py
+++ /dev/null
@@ -1,87 +0,0 @@
-import os
-import pathlib
-import urllib
-
-from mopidy import models
-from mopidy.internal import path
-
-from . import Extension
-
-
-def path_to_uri(path, scheme=Extension.ext_name):
-    """Convert file path to URI."""
-    bytes_path = os.path.normpath(bytes(path))
-    uripath = urllib.parse.quote_from_bytes(bytes_path)
-    return urllib.parse.urlunsplit((scheme, None, uripath, None, None))
-
-
-def uri_to_path(uri):
-    """Convert URI to file path."""
-    return path.uri_to_path(uri)
-
-
-def name_from_path(path):
-    """Extract name from file path."""
-    name = bytes(pathlib.Path(path.stem))
-    try:
-        return name.decode(errors="replace")
-    except UnicodeError:
-        return None
-
-
-def path_from_name(name, ext=None, sep="|"):
-    """Convert name with optional extension to file path."""
-    if ext:
-        name = name.replace(os.sep, sep) + ext
-    else:
-        name = name.replace(os.sep, sep)
-    return pathlib.Path(name)
-
-
-def path_to_ref(path):
-    return models.Ref.playlist(uri=path_to_uri(path), name=name_from_path(path))
-
-
-def load_items(fp, basedir):
-    refs = []
-    name = None
-    for line in filter(None, (line.strip() for line in fp)):
-        if line.startswith("#"):
-            if line.startswith("#EXTINF:"):
-                name = line.partition(",")[2]
-            continue
-        elif not urllib.parse.urlsplit(line).scheme:
-            path = basedir / line
-            if not name:
-                name = name_from_path(path)
-            uri = path_to_uri(path, scheme="file")
-        else:
-            # TODO: ensure this is urlencoded
-            uri = line  # do *not* extract name from (stream?) URI path
-        refs.append(models.Ref.track(uri=uri, name=name))
-        name = None
-    return refs
-
-
-def dump_items(items, fp):
-    if any(item.name for item in items):
-        print("#EXTM3U", file=fp)
-    for item in items:
-        if item.name:
-            print(f"#EXTINF:-1,{item.name}", file=fp)
-        # TODO: convert file URIs to (relative) paths?
-        if isinstance(item.uri, bytes):
-            print(item.uri.decode(), file=fp)
-        else:
-            print(item.uri, file=fp)
-
-
-def playlist(path, items=None, mtime=None):
-    if items is None:
-        items = []
-    return models.Playlist(
-        uri=path_to_uri(path),
-        name=name_from_path(path),
-        tracks=[models.Track(uri=item.uri, name=item.name) for item in items],
-        last_modified=(int(mtime * 1000) if mtime else None),
-    )
diff --git a/venv/lib/python3.7/site-packages/mopidy/mixer.py b/venv/lib/python3.7/site-packages/mopidy/mixer.py
deleted file mode 100644
index 3ae6389..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/mixer.py
+++ /dev/null
@@ -1,152 +0,0 @@
-import logging
-
-from mopidy import listener
-
-logger = logging.getLogger(__name__)
-
-
-class Mixer:
-
-    """
-    Audio mixer API
-
-    If the mixer has problems during initialization it should raise
-    :exc:`mopidy.exceptions.MixerError` with a descriptive error message. This
-    will make Mopidy print the error message and exit so that the user can fix
-    the issue.
-
-    :param config: the entire Mopidy configuration
-    :type config: dict
-    """
-
-    name = None
-    """
-    Name of the mixer.
-
-    Used when configuring what mixer to use. Should match the
-    :attr:`~mopidy.ext.Extension.ext_name` of the extension providing the
-    mixer.
-    """
-
-    def __init__(self, config):
-        pass
-
-    def get_volume(self):
-        """
-        Get volume level of the mixer on a linear scale from 0 to 100.
-
-        Example values:
-
-        0:
-            Minimum volume, usually silent.
-        100:
-            Maximum volume.
-        :class:`None`:
-            Volume is unknown.
-
-        *MAY be implemented by subclass.*
-
-        :rtype: int in range [0..100] or :class:`None`
-        """
-        return None
-
-    def set_volume(self, volume):
-        """
-        Set volume level of the mixer.
-
-        *MAY be implemented by subclass.*
-
-        :param volume: Volume in the range [0..100]
-        :type volume: int
-        :rtype: :class:`True` if success, :class:`False` if failure
-        """
-        return False
-
-    def trigger_volume_changed(self, volume):
-        """
-        Send ``volume_changed`` event to all mixer listeners.
-
-        This method should be called by subclasses when the volume is changed,
-        either because of a call to :meth:`set_volume` or because of any
-        external entity changing the volume.
-        """
-        logger.debug("Mixer event: volume_changed(volume=%d)", volume)
-        MixerListener.send("volume_changed", volume=volume)
-
-    def get_mute(self):
-        """
-        Get mute state of the mixer.
-
-        *MAY be implemented by subclass.*
-
-        :rtype: :class:`True` if muted, :class:`False` if unmuted,
-          :class:`None` if unknown.
-        """
-        return None
-
-    def set_mute(self, mute):
-        """
-        Mute or unmute the mixer.
-
-        *MAY be implemented by subclass.*
-
-        :param mute: :class:`True` to mute, :class:`False` to unmute
-        :type mute: bool
-        :rtype: :class:`True` if success, :class:`False` if failure
-        """
-        return False
-
-    def trigger_mute_changed(self, mute):
-        """
-        Send ``mute_changed`` event to all mixer listeners.
-
-        This method should be called by subclasses when the mute state is
-        changed, either because of a call to :meth:`set_mute` or because of
-        any external entity changing the mute state.
-        """
-        logger.debug("Mixer event: mute_changed(mute=%s)", mute)
-        MixerListener.send("mute_changed", mute=mute)
-
-    def ping(self):
-        """Called to check if the actor is still alive."""
-        return True
-
-
-class MixerListener(listener.Listener):
-
-    """
-    Marker interface for recipients of events sent by the mixer actor.
-
-    Any Pykka actor that mixes in this class will receive calls to the methods
-    defined here when the corresponding events happen in the mixer actor. This
-    interface is used both for looking up what actors to notify of the events,
-    and for providing default implementations for those listeners that are not
-    interested in all events.
-    """
-
-    @staticmethod
-    def send(event, **kwargs):
-        """Helper to allow calling of mixer listener events"""
-        listener.send(MixerListener, event, **kwargs)
-
-    def volume_changed(self, volume):
-        """
-        Called after the volume has changed.
-
-        *MAY* be implemented by actor.
-
-        :param volume: the new volume
-        :type volume: int in range [0..100]
-        """
-        pass
-
-    def mute_changed(self, mute):
-        """
-        Called after the mute state has changed.
-
-        *MAY* be implemented by actor.
-
-        :param mute: :class:`True` if muted, :class:`False` if not muted
-        :type mute: bool
-        """
-        pass
diff --git a/venv/lib/python3.7/site-packages/mopidy/models/__init__.py b/venv/lib/python3.7/site-packages/mopidy/models/__init__.py
deleted file mode 100644
index 9342783..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/models/__init__.py
+++ /dev/null
@@ -1,361 +0,0 @@
-from mopidy.models import fields
-from mopidy.models.immutable import ImmutableObject, ValidatedImmutableObject
-from mopidy.models.serialize import ModelJSONEncoder, model_json_decoder
-
-__all__ = [
-    "ImmutableObject",
-    "Ref",
-    "Image",
-    "Artist",
-    "Album",
-    "Track",
-    "TlTrack",
-    "Playlist",
-    "SearchResult",
-    "model_json_decoder",
-    "ModelJSONEncoder",
-    "ValidatedImmutableObject",
-]
-
-
-class Ref(ValidatedImmutableObject):
-
-    """
-    Model to represent URI references with a human friendly name and type
-    attached. This is intended for use a lightweight object "free" of metadata
-    that can be passed around instead of using full blown models.
-
-    :param uri: object URI
-    :type uri: string
-    :param name: object name
-    :type name: string
-    :param type: object type
-    :type type: string
-    """
-
-    #: The object URI. Read-only.
-    uri = fields.URI()
-
-    #: The object name. Read-only.
-    name = fields.String()
-
-    #: The object type, e.g. "artist", "album", "track", "playlist",
-    #: "directory". Read-only.
-    type = fields.Identifier()  # TODO: consider locking this down.
-    # type = fields.Field(choices=(ALBUM, ARTIST, DIRECTORY, PLAYLIST, TRACK))
-
-    #: Constant used for comparison with the :attr:`type` field.
-    ALBUM = "album"
-
-    #: Constant used for comparison with the :attr:`type` field.
-    ARTIST = "artist"
-
-    #: Constant used for comparison with the :attr:`type` field.
-    DIRECTORY = "directory"
-
-    #: Constant used for comparison with the :attr:`type` field.
-    PLAYLIST = "playlist"
-
-    #: Constant used for comparison with the :attr:`type` field.
-    TRACK = "track"
-
-    @classmethod
-    def album(cls, **kwargs):
-        """Create a :class:`Ref` with ``type`` :attr:`ALBUM`."""
-        kwargs["type"] = Ref.ALBUM
-        return cls(**kwargs)
-
-    @classmethod
-    def artist(cls, **kwargs):
-        """Create a :class:`Ref` with ``type`` :attr:`ARTIST`."""
-        kwargs["type"] = Ref.ARTIST
-        return cls(**kwargs)
-
-    @classmethod
-    def directory(cls, **kwargs):
-        """Create a :class:`Ref` with ``type`` :attr:`DIRECTORY`."""
-        kwargs["type"] = Ref.DIRECTORY
-        return cls(**kwargs)
-
-    @classmethod
-    def playlist(cls, **kwargs):
-        """Create a :class:`Ref` with ``type`` :attr:`PLAYLIST`."""
-        kwargs["type"] = Ref.PLAYLIST
-        return cls(**kwargs)
-
-    @classmethod
-    def track(cls, **kwargs):
-        """Create a :class:`Ref` with ``type`` :attr:`TRACK`."""
-        kwargs["type"] = Ref.TRACK
-        return cls(**kwargs)
-
-
-class Image(ValidatedImmutableObject):
-
-    """
-    :param string uri: URI of the image
-    :param int width: Optional width of image or :class:`None`
-    :param int height: Optional height of image or :class:`None`
-    """
-
-    #: The image URI. Read-only.
-    uri = fields.URI()
-
-    #: Optional width of the image or :class:`None`. Read-only.
-    width = fields.Integer(min=0)
-
-    #: Optional height of the image or :class:`None`. Read-only.
-    height = fields.Integer(min=0)
-
-
-class Artist(ValidatedImmutableObject):
-
-    """
-    :param uri: artist URI
-    :type uri: string
-    :param name: artist name
-    :type name: string
-    :param sortname: artist name for sorting
-    :type sortname: string
-    :param musicbrainz_id: MusicBrainz ID
-    :type musicbrainz_id: string
-    """
-
-    #: The artist URI. Read-only.
-    uri = fields.URI()
-
-    #: The artist name. Read-only.
-    name = fields.String()
-
-    #: Artist name for better sorting, e.g. with articles stripped
-    sortname = fields.String()
-
-    #: The MusicBrainz ID of the artist. Read-only.
-    musicbrainz_id = fields.Identifier()
-
-
-class Album(ValidatedImmutableObject):
-
-    """
-    :param uri: album URI
-    :type uri: string
-    :param name: album name
-    :type name: string
-    :param artists: album artists
-    :type artists: list of :class:`Artist`
-    :param num_tracks: number of tracks in album
-    :type num_tracks: integer or :class:`None` if unknown
-    :param num_discs: number of discs in album
-    :type num_discs: integer or :class:`None` if unknown
-    :param date: album release date (YYYY or YYYY-MM-DD)
-    :type date: string
-    :param musicbrainz_id: MusicBrainz ID
-    :type musicbrainz_id: string
-    """
-
-    #: The album URI. Read-only.
-    uri = fields.URI()
-
-    #: The album name. Read-only.
-    name = fields.String()
-
-    #: A set of album artists. Read-only.
-    artists = fields.Collection(type=Artist, container=frozenset)
-
-    #: The number of tracks in the album. Read-only.
-    num_tracks = fields.Integer(min=0)
-
-    #: The number of discs in the album. Read-only.
-    num_discs = fields.Integer(min=0)
-
-    #: The album release date. Read-only.
-    date = fields.Date()
-
-    #: The MusicBrainz ID of the album. Read-only.
-    musicbrainz_id = fields.Identifier()
-
-
-class Track(ValidatedImmutableObject):
-
-    """
-    :param uri: track URI
-    :type uri: string
-    :param name: track name
-    :type name: string
-    :param artists: track artists
-    :type artists: list of :class:`Artist`
-    :param album: track album
-    :type album: :class:`Album`
-    :param composers: track composers
-    :type composers: list of :class:`Artist`
-    :param performers: track performers
-    :type performers: list of :class:`Artist`
-    :param genre: track genre
-    :type genre: string
-    :param track_no: track number in album
-    :type track_no: integer or :class:`None` if unknown
-    :param disc_no: disc number in album
-    :type disc_no: integer or :class:`None` if unknown
-    :param date: track release date (YYYY or YYYY-MM-DD)
-    :type date: string
-    :param length: track length in milliseconds
-    :type length: integer or :class:`None` if there is no duration
-    :param bitrate: bitrate in kbit/s
-    :type bitrate: integer
-    :param comment: track comment
-    :type comment: string
-    :param musicbrainz_id: MusicBrainz ID
-    :type musicbrainz_id: string
-    :param last_modified: Represents last modification time
-    :type last_modified: integer or :class:`None` if unknown
-    """
-
-    #: The track URI. Read-only.
-    uri = fields.URI()
-
-    #: The track name. Read-only.
-    name = fields.String()
-
-    #: A set of track artists. Read-only.
-    artists = fields.Collection(type=Artist, container=frozenset)
-
-    #: The track :class:`Album`. Read-only.
-    album = fields.Field(type=Album)
-
-    #: A set of track composers. Read-only.
-    composers = fields.Collection(type=Artist, container=frozenset)
-
-    #: A set of track performers`. Read-only.
-    performers = fields.Collection(type=Artist, container=frozenset)
-
-    #: The track genre. Read-only.
-    genre = fields.String()
-
-    #: The track number in the album. Read-only.
-    track_no = fields.Integer(min=0)
-
-    #: The disc number in the album. Read-only.
-    disc_no = fields.Integer(min=0)
-
-    #: The track release date. Read-only.
-    date = fields.Date()
-
-    #: The track length in milliseconds. Read-only.
-    length = fields.Integer(min=0)
-
-    #: The track's bitrate in kbit/s. Read-only.
-    bitrate = fields.Integer(min=0)
-
-    #: The track comment. Read-only.
-    comment = fields.String()
-
-    #: The MusicBrainz ID of the track. Read-only.
-    musicbrainz_id = fields.Identifier()
-
-    #: Integer representing when the track was last modified. Exact meaning
-    #: depends on source of track. For local files this is the modification
-    #: time in milliseconds since Unix epoch. For other backends it could be an
-    #: equivalent timestamp or simply a version counter.
-    last_modified = fields.Integer(min=0)
-
-
-class TlTrack(ValidatedImmutableObject):
-
-    """
-    A tracklist track. Wraps a regular track and it's tracklist ID.
-
-    The use of :class:`TlTrack` allows the same track to appear multiple times
-    in the tracklist.
-
-    This class also accepts it's parameters as positional arguments. Both
-    arguments must be provided, and they must appear in the order they are
-    listed here.
-
-    This class also supports iteration, so your extract its values like this::
-
-        (tlid, track) = tl_track
-
-    :param tlid: tracklist ID
-    :type tlid: int
-    :param track: the track
-    :type track: :class:`Track`
-    """
-
-    #: The tracklist ID. Read-only.
-    tlid = fields.Integer(min=0)
-
-    #: The track. Read-only.
-    track = fields.Field(type=Track)
-
-    def __init__(self, *args, **kwargs):
-        if len(args) == 2 and len(kwargs) == 0:
-            kwargs["tlid"] = args[0]
-            kwargs["track"] = args[1]
-            args = []
-        super().__init__(*args, **kwargs)
-
-    def __iter__(self):
-        return iter([self.tlid, self.track])
-
-
-class Playlist(ValidatedImmutableObject):
-
-    """
-    :param uri: playlist URI
-    :type uri: string
-    :param name: playlist name
-    :type name: string
-    :param tracks: playlist's tracks
-    :type tracks: list of :class:`Track` elements
-    :param last_modified:
-        playlist's modification time in milliseconds since Unix epoch
-    :type last_modified: int
-    """
-
-    #: The playlist URI. Read-only.
-    uri = fields.URI()
-
-    #: The playlist name. Read-only.
-    name = fields.String()
-
-    #: The playlist's tracks. Read-only.
-    tracks = fields.Collection(type=Track, container=tuple)
-
-    #: The playlist modification time in milliseconds since Unix epoch.
-    #: Read-only.
-    #:
-    #: Integer, or :class:`None` if unknown.
-    last_modified = fields.Integer(min=0)
-
-    # TODO: def insert(self, pos, track): ... ?
-
-    @property
-    def length(self):
-        """The number of tracks in the playlist. Read-only."""
-        return len(self.tracks)
-
-
-class SearchResult(ValidatedImmutableObject):
-
-    """
-    :param uri: search result URI
-    :type uri: string
-    :param tracks: matching tracks
-    :type tracks: list of :class:`Track` elements
-    :param artists: matching artists
-    :type artists: list of :class:`Artist` elements
-    :param albums: matching albums
-    :type albums: list of :class:`Album` elements
-    """
-
-    #: The search result URI. Read-only.
-    uri = fields.URI()
-
-    #: The tracks matching the search query. Read-only.
-    tracks = fields.Collection(type=Track, container=tuple)
-
-    #: The artists matching the search query. Read-only.
-    artists = fields.Collection(type=Artist, container=tuple)
-
-    #: The albums matching the search query. Read-only.
-    albums = fields.Collection(type=Album, container=tuple)
diff --git a/venv/lib/python3.7/site-packages/mopidy/models/fields.py b/venv/lib/python3.7/site-packages/mopidy/models/fields.py
deleted file mode 100644
index 901aba6..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/models/fields.py
+++ /dev/null
@@ -1,179 +0,0 @@
-import sys
-
-
-class Field:
-
-    """
-    Base field for use in
-    :class:`~mopidy.models.immutable.ValidatedImmutableObject`. These fields
-    are responsible for type checking and other data sanitation in our models.
-
-    For simplicity fields use the Python descriptor protocol to store the
-    values in the instance dictionary. Also note that fields are mutable if
-    the object they are attached to allow it.
-
-    Default values will be validated with the exception of :class:`None`.
-
-    :param default: default value for field
-    :param type: if set the field value must be of this type
-    :param choices: if set the field value must be one of these
-    """
-
-    def __init__(self, default=None, type=None, choices=None):
-        self._name = None  # Set by ValidatedImmutableObjectMeta
-        self._choices = choices
-        self._default = default
-        self._type = type
-
-        if self._default is not None:
-            self.validate(self._default)
-
-    def validate(self, value):
-        """Validate and possibly modify the field value before assignment"""
-        if self._type and not isinstance(value, self._type):
-            raise TypeError(
-                f"Expected {self._name} to be a {self._type}, not {value!r}"
-            )
-        if self._choices and value not in self._choices:
-            raise TypeError(
-                f"Expected {self._name} to be a one of {self._choices}, not {value!r}"
-            )
-        return value
-
-    def __get__(self, instance, owner):
-        if not instance:
-            return self
-        return getattr(instance, "_" + self._name, self._default)
-
-    def __set__(self, instance, value):
-        if value is not None:
-            value = self.validate(value)
-
-        if value is None or value == self._default:
-            self.__delete__(instance)
-        else:
-            setattr(instance, "_" + self._name, value)
-
-    def __delete__(self, instance):
-        if hasattr(instance, "_" + self._name):
-            delattr(instance, "_" + self._name)
-
-
-class String(Field):
-
-    """
-    Specialized :class:`Field` which is wired up for bytes and unicode.
-
-    :param default: default value for field
-    """
-
-    def __init__(self, default=None):
-        # TODO: normalize to unicode?
-        # TODO: only allow unicode?
-        # TODO: disallow empty strings?
-        super().__init__(type=str, default=default)
-
-
-class Date(String):
-    """
-    :class:`Field` for storing ISO 8601 dates as a string.
-
-    Supported formats are ``YYYY-MM-DD``, ``YYYY-MM`` and ``YYYY``, currently
-    not validated.
-
-    :param default: default value for field
-    """
-
-    pass  # TODO: make this check for YYYY-MM-DD, YYYY-MM, YYYY using strptime.
-
-
-class Identifier(String):
-    """
-    :class:`Field` for storing values such as GUIDs or other identifiers.
-
-    Values will be interned.
-
-    :param default: default value for field
-    """
-
-    def validate(self, value):
-        value = super().validate(value)
-        if isinstance(value, bytes):
-            value = value.decode()
-        return sys.intern(value)
-
-
-class URI(Identifier):
-    """
-    :class:`Field` for storing URIs
-
-    Values will be interned, currently not validated.
-
-    :param default: default value for field
-    """
-
-    pass  # TODO: validate URIs?
-
-
-class Integer(Field):
-    """
-    :class:`Field` for storing integer numbers.
-
-    :param default: default value for field
-    :param min: field value must be larger or equal to this value when set
-    :param max: field value must be smaller or equal to this value when set
-    """
-
-    def __init__(self, default=None, min=None, max=None):
-        self._min = min
-        self._max = max
-        super().__init__(type=int, default=default)
-
-    def validate(self, value):
-        value = super().validate(value)
-        if self._min is not None and value < self._min:
-            raise ValueError(
-                f"Expected {self._name} to be at least {self._min}, not {value:d}"
-            )
-        if self._max is not None and value > self._max:
-            raise ValueError(
-                f"Expected {self._name} to be at most {self._max}, not {value:d}"
-            )
-        return value
-
-
-class Boolean(Field):
-    """
-    :class:`Field` for storing boolean values
-
-    :param default: default value for field
-    """
-
-    def __init__(self, default=None):
-        super().__init__(type=bool, default=default)
-
-
-class Collection(Field):
-    """
-    :class:`Field` for storing collections of a given type.
-
-    :param type: all items stored in the collection must be of this type
-    :param container: the type to store the items in
-    """
-
-    def __init__(self, type, container=tuple):
-        super().__init__(type=type, default=container())
-
-    def validate(self, value):
-        if isinstance(value, str):
-            raise TypeError(
-                f"Expected {self._name} to be a collection of "
-                f"{self._type.__name__}, not {value!r}"
-            )
-        for v in value:
-            if not isinstance(v, self._type):
-                raise TypeError(
-                    f"Expected {self._name} to be a collection of "
-                    f"{self._type.__name__}, not {value!r}"
-                )
-        return self._default.__class__(value) or None
diff --git a/venv/lib/python3.7/site-packages/mopidy/models/immutable.py b/venv/lib/python3.7/site-packages/mopidy/models/immutable.py
deleted file mode 100644
index fbf29ed..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/models/immutable.py
+++ /dev/null
@@ -1,219 +0,0 @@
-import copy
-import itertools
-import weakref
-
-from mopidy.models.fields import Field
-
-# Registered models for automatic deserialization
-_models = {}
-
-
-class ImmutableObject:
-    """
-    Superclass for immutable objects whose fields can only be modified via the
-    constructor.
-
-    This version of this class has been retained to avoid breaking any clients
-    relying on it's behavior. Internally in Mopidy we now use
-    :class:`ValidatedImmutableObject` for type safety and it's much smaller
-    memory footprint.
-
-    :param kwargs: kwargs to set as fields on the object
-    :type kwargs: any
-    """
-
-    # Any sub-classes that don't set slots won't be effected by the base using
-    # slots as they will still get an instance dict.
-    __slots__ = ["__weakref__"]
-
-    def __init__(self, *args, **kwargs):
-        for key, value in kwargs.items():
-            if not self._is_valid_field(key):
-                raise TypeError(
-                    f"__init__() got an unexpected keyword argument {key!r}"
-                )
-            self._set_field(key, value)
-
-    def __setattr__(self, name, value):
-        if name.startswith("_"):
-            object.__setattr__(self, name, value)
-        else:
-            raise AttributeError("Object is immutable.")
-
-    def __delattr__(self, name):
-        if name.startswith("_"):
-            object.__delattr__(self, name)
-        else:
-            raise AttributeError("Object is immutable.")
-
-    def _is_valid_field(self, name):
-        return hasattr(self, name) and not callable(getattr(self, name))
-
-    def _set_field(self, name, value):
-        if value == getattr(self.__class__, name):
-            self.__dict__.pop(name, None)
-        else:
-            self.__dict__[name] = value
-
-    def _items(self):
-        return self.__dict__.items()
-
-    def __repr__(self):
-        kwarg_pairs = []
-        for key, value in sorted(self._items()):
-            if isinstance(value, (frozenset, tuple)):
-                if not value:
-                    continue
-                value = list(value)
-            kwarg_pairs.append(f"{key}={value!r}")
-        return f"{self.__class__.__name__}({', '.join(kwarg_pairs)})"
-
-    def __hash__(self):
-        hash_sum = 0
-        for key, value in self._items():
-            hash_sum += hash(key) + hash(value)
-        return hash_sum
-
-    def __eq__(self, other):
-        if not isinstance(other, self.__class__):
-            return False
-        return all(
-            a == b
-            for a, b in itertools.zip_longest(
-                self._items(), other._items(), fillvalue=object()
-            )
-        )
-
-    def __ne__(self, other):
-        return not self.__eq__(other)
-
-    def replace(self, **kwargs):
-        """
-        Replace the fields in the model and return a new instance
-
-        Examples::
-
-            # Returns a track with a new name
-            Track(name='foo').replace(name='bar')
-            # Return an album with a new number of tracks
-            Album(num_tracks=2).replace(num_tracks=5)
-
-        :param kwargs: kwargs to set as fields on the object
-        :type kwargs: any
-        :rtype: instance of the model with replaced fields
-        """
-        other = copy.copy(self)
-        for key, value in kwargs.items():
-            if not self._is_valid_field(key):
-                raise TypeError(
-                    f"replace() got an unexpected keyword argument {key!r}"
-                )
-            other._set_field(key, value)
-        return other
-
-    def serialize(self):
-        data = {}
-        data["__model__"] = self.__class__.__name__
-        for key, value in self._items():
-            if isinstance(value, (set, frozenset, list, tuple)):
-                value = [
-                    v.serialize() if isinstance(v, ImmutableObject) else v
-                    for v in value
-                ]
-            elif isinstance(value, ImmutableObject):
-                value = value.serialize()
-            if not (isinstance(value, list) and len(value) == 0):
-                data[key] = value
-        return data
-
-
-class _ValidatedImmutableObjectMeta(type):
-
-    """Helper that initializes fields, slots and memoizes instance creation."""
-
-    def __new__(cls, name, bases, attrs):
-        fields = {}
-
-        for base in bases:  # Copy parent fields over to our state
-            fields.update(getattr(base, "_fields", {}))
-
-        for key, value in attrs.items():  # Add our own fields
-            if isinstance(value, Field):
-                fields[key] = "_" + key
-                value._name = key
-
-        attrs["_fields"] = fields
-        attrs["_instances"] = weakref.WeakValueDictionary()
-        attrs["__slots__"] = list(attrs.get("__slots__", [])) + list(
-            fields.values()
-        )
-
-        clsc = super().__new__(cls, name, bases, attrs)
-
-        if clsc.__name__ != "ValidatedImmutableObject":
-            _models[clsc.__name__] = clsc
-
-        return clsc
-
-    def __call__(cls, *args, **kwargs):  # noqa: N805
-        instance = super().__call__(*args, **kwargs)
-        return cls._instances.setdefault(weakref.ref(instance), instance)
-
-
-class ValidatedImmutableObject(
-    ImmutableObject, metaclass=_ValidatedImmutableObjectMeta
-):
-    """
-    Superclass for immutable objects whose fields can only be modified via the
-    constructor. Fields should be :class:`Field` instances to ensure type
-    safety in our models.
-
-    Note that since these models can not be changed, we heavily memoize them
-    to save memory. So constructing a class with the same arguments twice will
-    give you the same instance twice.
-    """
-
-    __slots__ = ["_hash"]
-
-    def __hash__(self):
-        if not hasattr(self, "_hash"):
-            hash_sum = super().__hash__()
-            object.__setattr__(self, "_hash", hash_sum)
-        return self._hash
-
-    def _is_valid_field(self, name):
-        return name in self._fields
-
-    def _set_field(self, name, value):
-        object.__setattr__(self, name, value)
-
-    def _items(self):
-        for field, key in self._fields.items():
-            if hasattr(self, key):
-                yield field, getattr(self, key)
-
-    def replace(self, **kwargs):
-        """
-        Replace the fields in the model and return a new instance
-
-        Examples::
-
-            # Returns a track with a new name
-            Track(name='foo').replace(name='bar')
-            # Return an album with a new number of tracks
-            Album(num_tracks=2).replace(num_tracks=5)
-
-        Note that internally we memoize heavily to keep memory usage down given
-        our overly repetitive data structures. So you might get an existing
-        instance if it contains the same values.
-
-        :param kwargs: kwargs to set as fields on the object
-        :type kwargs: any
-        :rtype: instance of the model with replaced fields
-        """
-        if not kwargs:
-            return self
-        other = super().replace(**kwargs)
-        if hasattr(self, "_hash"):
-            object.__delattr__(other, "_hash")
-        return self._instances.setdefault(weakref.ref(other), other)
diff --git a/venv/lib/python3.7/site-packages/mopidy/models/serialize.py b/venv/lib/python3.7/site-packages/mopidy/models/serialize.py
deleted file mode 100644
index 066f3ff..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/models/serialize.py
+++ /dev/null
@@ -1,43 +0,0 @@
-import json
-
-from mopidy.models import immutable
-
-
-class ModelJSONEncoder(json.JSONEncoder):
-
-    """
-    Automatically serialize Mopidy models to JSON.
-
-    Usage::
-
-        >>> import json
-        >>> json.dumps({'a_track': Track(name='name')}, cls=ModelJSONEncoder)
-        '{"a_track": {"__model__": "Track", "name": "name"}}'
-
-    """
-
-    def default(self, obj):
-        if isinstance(obj, immutable.ImmutableObject):
-            return obj.serialize()
-        return json.JSONEncoder.default(self, obj)
-
-
-def model_json_decoder(dct):
-    """
-    Automatically deserialize Mopidy models from JSON.
-
-    Usage::
-
-        >>> import json
-        >>> json.loads(
-        ...     '{"a_track": {"__model__": "Track", "name": "name"}}',
-        ...     object_hook=model_json_decoder)
-        {u'a_track': Track(artists=[], name=u'name')}
-
-    """
-    if "__model__" in dct:
-        model_name = dct.pop("__model__")
-        if model_name in immutable._models:
-            cls = immutable._models[model_name]
-            return cls(**dct)
-    return dct
diff --git a/venv/lib/python3.7/site-packages/mopidy/softwaremixer/__init__.py b/venv/lib/python3.7/site-packages/mopidy/softwaremixer/__init__.py
deleted file mode 100644
index 6966b4e..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/softwaremixer/__init__.py
+++ /dev/null
@@ -1,24 +0,0 @@
-import os
-
-import mopidy
-from mopidy import config, ext
-
-
-class Extension(ext.Extension):
-
-    dist_name = "Mopidy-SoftwareMixer"
-    ext_name = "softwaremixer"
-    version = mopidy.__version__
-
-    def get_default_config(self):
-        conf_file = os.path.join(os.path.dirname(__file__), "ext.conf")
-        return config.read(conf_file)
-
-    def get_config_schema(self):
-        schema = super().get_config_schema()
-        return schema
-
-    def setup(self, registry):
-        from .mixer import SoftwareMixer
-
-        registry.add("mixer", SoftwareMixer)
diff --git a/venv/lib/python3.7/site-packages/mopidy/softwaremixer/ext.conf b/venv/lib/python3.7/site-packages/mopidy/softwaremixer/ext.conf
deleted file mode 100644
index 47a98ba..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/softwaremixer/ext.conf
+++ /dev/null
@@ -1,2 +0,0 @@
-[softwaremixer]
-enabled = true
diff --git a/venv/lib/python3.7/site-packages/mopidy/softwaremixer/mixer.py b/venv/lib/python3.7/site-packages/mopidy/softwaremixer/mixer.py
deleted file mode 100644
index 43f4055..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/softwaremixer/mixer.py
+++ /dev/null
@@ -1,58 +0,0 @@
-import logging
-
-import pykka
-
-from mopidy import mixer
-
-logger = logging.getLogger(__name__)
-
-
-class SoftwareMixer(pykka.ThreadingActor, mixer.Mixer):
-
-    name = "software"
-
-    def __init__(self, config):
-        super().__init__(config)
-
-        self._audio_mixer = None
-        self._initial_volume = None
-        self._initial_mute = None
-
-    def setup(self, mixer_ref):
-        self._audio_mixer = mixer_ref
-
-        # The Mopidy startup procedure will set the initial volume of a
-        # mixer, but this happens before the audio actor's mixer is injected
-        # into the software mixer actor and has no effect. Thus, we need to set
-        # the initial volume again.
-        if self._initial_volume is not None:
-            self.set_volume(self._initial_volume)
-        if self._initial_mute is not None:
-            self.set_mute(self._initial_mute)
-
-    def teardown(self):
-        self._audio_mixer = None
-
-    def get_volume(self):
-        if self._audio_mixer is None:
-            return None
-        return self._audio_mixer.get_volume().get()
-
-    def set_volume(self, volume):
-        if self._audio_mixer is None:
-            self._initial_volume = volume
-            return False
-        self._audio_mixer.set_volume(volume)
-        return True
-
-    def get_mute(self):
-        if self._audio_mixer is None:
-            return None
-        return self._audio_mixer.get_mute().get()
-
-    def set_mute(self, mute):
-        if self._audio_mixer is None:
-            self._initial_mute = mute
-            return False
-        self._audio_mixer.set_mute(mute)
-        return True
diff --git a/venv/lib/python3.7/site-packages/mopidy/stream/__init__.py b/venv/lib/python3.7/site-packages/mopidy/stream/__init__.py
deleted file mode 100644
index aaeaad1..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/stream/__init__.py
+++ /dev/null
@@ -1,30 +0,0 @@
-import os
-
-import mopidy
-from mopidy import config, ext
-
-
-class Extension(ext.Extension):
-
-    dist_name = "Mopidy-Stream"
-    ext_name = "stream"
-    version = mopidy.__version__
-
-    def get_default_config(self):
-        conf_file = os.path.join(os.path.dirname(__file__), "ext.conf")
-        return config.read(conf_file)
-
-    def get_config_schema(self):
-        schema = super().get_config_schema()
-        schema["protocols"] = config.List()
-        schema["metadata_blacklist"] = config.List(optional=True)
-        schema["timeout"] = config.Integer(minimum=1000, maximum=1000 * 60 * 60)
-        return schema
-
-    def validate_environment(self):
-        pass
-
-    def setup(self, registry):
-        from .actor import StreamBackend
-
-        registry.add("backend", StreamBackend)
diff --git a/venv/lib/python3.7/site-packages/mopidy/stream/actor.py b/venv/lib/python3.7/site-packages/mopidy/stream/actor.py
deleted file mode 100644
index 8c993fb..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/stream/actor.py
+++ /dev/null
@@ -1,187 +0,0 @@
-import fnmatch
-import logging
-import re
-import time
-import urllib
-
-import pykka
-
-from mopidy import audio as audio_lib
-from mopidy import backend, exceptions, stream
-from mopidy.audio import scan, tags
-from mopidy.internal import http, playlists
-from mopidy.models import Track
-
-logger = logging.getLogger(__name__)
-
-
-class StreamBackend(pykka.ThreadingActor, backend.Backend):
-    def __init__(self, config, audio):
-        super().__init__()
-
-        self._scanner = scan.Scanner(
-            timeout=config["stream"]["timeout"], proxy_config=config["proxy"]
-        )
-
-        self._session = http.get_requests_session(
-            proxy_config=config["proxy"],
-            user_agent=(
-                f"{stream.Extension.dist_name}/{stream.Extension.version}"
-            ),
-        )
-
-        blacklist = config["stream"]["metadata_blacklist"]
-        self._blacklist_re = re.compile(
-            r"^(%s)$" % "|".join(fnmatch.translate(u) for u in blacklist)
-        )
-
-        self._timeout = config["stream"]["timeout"]
-
-        self.library = StreamLibraryProvider(backend=self)
-        self.playback = StreamPlaybackProvider(audio=audio, backend=self)
-        self.playlists = None
-
-        self.uri_schemes = audio_lib.supported_uri_schemes(
-            config["stream"]["protocols"]
-        )
-
-        if "file" in self.uri_schemes and config["file"]["enabled"]:
-            logger.warning(
-                'The stream/protocols config value includes the "file" '
-                'protocol. "file" playback is now handled by Mopidy-File. '
-                "Please remove it from the stream/protocols config."
-            )
-            self.uri_schemes -= {"file"}
-
-
-class StreamLibraryProvider(backend.LibraryProvider):
-    def lookup(self, uri):
-        if urllib.parse.urlsplit(uri).scheme not in self.backend.uri_schemes:
-            return []
-
-        if self.backend._blacklist_re.match(uri):
-            logger.debug("URI matched metadata lookup blacklist: %s", uri)
-            return [Track(uri=uri)]
-
-        _, scan_result = _unwrap_stream(
-            uri,
-            timeout=self.backend._timeout,
-            scanner=self.backend._scanner,
-            requests_session=self.backend._session,
-        )
-
-        if scan_result:
-            track = tags.convert_tags_to_track(scan_result.tags).replace(
-                uri=uri, length=scan_result.duration
-            )
-        else:
-            logger.warning("Problem looking up %s", uri)
-            track = Track(uri=uri)
-
-        return [track]
-
-
-class StreamPlaybackProvider(backend.PlaybackProvider):
-    def translate_uri(self, uri):
-        if urllib.parse.urlsplit(uri).scheme not in self.backend.uri_schemes:
-            return None
-
-        if self.backend._blacklist_re.match(uri):
-            logger.debug("URI matched metadata lookup blacklist: %s", uri)
-            return uri
-
-        unwrapped_uri, _ = _unwrap_stream(
-            uri,
-            timeout=self.backend._timeout,
-            scanner=self.backend._scanner,
-            requests_session=self.backend._session,
-        )
-        return unwrapped_uri
-
-
-# TODO: cleanup the return value of this.
-def _unwrap_stream(uri, timeout, scanner, requests_session):
-    """
-    Get a stream URI from a playlist URI, ``uri``.
-
-    Unwraps nested playlists until something that's not a playlist is found or
-    the ``timeout`` is reached.
-    """
-
-    original_uri = uri
-    seen_uris = set()
-    deadline = time.time() + timeout
-
-    while time.time() < deadline:
-        if uri in seen_uris:
-            logger.info(
-                "Unwrapping stream from URI (%s) failed: "
-                "playlist referenced itself",
-                uri,
-            )
-            return None, None
-        else:
-            seen_uris.add(uri)
-
-        logger.debug("Unwrapping stream from URI: %s", uri)
-
-        try:
-            scan_timeout = deadline - time.time()
-            if scan_timeout < 0:
-                logger.info(
-                    "Unwrapping stream from URI (%s) failed: "
-                    "timed out in %sms",
-                    uri,
-                    timeout,
-                )
-                return None, None
-            scan_result = scanner.scan(uri, timeout=scan_timeout)
-        except exceptions.ScannerError as exc:
-            logger.debug("GStreamer failed scanning URI (%s): %s", uri, exc)
-            scan_result = None
-
-        if scan_result is not None:
-            has_interesting_mime = (
-                scan_result.mime is not None
-                and not scan_result.mime.startswith("text/")
-                and not scan_result.mime.startswith("application/")
-            )
-            if scan_result.playable or has_interesting_mime:
-                logger.debug(
-                    "Unwrapped potential %s stream: %s", scan_result.mime, uri
-                )
-                return uri, scan_result
-
-        download_timeout = deadline - time.time()
-        if download_timeout < 0:
-            logger.info(
-                "Unwrapping stream from URI (%s) failed: timed out in %sms",
-                uri,
-                timeout,
-            )
-            return None, None
-        content = http.download(
-            requests_session, uri, timeout=download_timeout / 1000
-        )
-
-        if content is None:
-            logger.info(
-                "Unwrapping stream from URI (%s) failed: "
-                "error downloading URI %s",
-                original_uri,
-                uri,
-            )
-            return None, None
-
-        uris = playlists.parse(content)
-        if not uris:
-            logger.debug(
-                "Failed parsing URI (%s) as playlist; found potential stream.",
-                uri,
-            )
-            return uri, None
-
-        # TODO Test streams and return first that seems to be playable
-        new_uri = uris[0]
-        logger.debug("Parsed playlist (%s) and found new URI: %s", uri, new_uri)
-        uri = urllib.parse.urljoin(uri, new_uri)
diff --git a/venv/lib/python3.7/site-packages/mopidy/stream/ext.conf b/venv/lib/python3.7/site-packages/mopidy/stream/ext.conf
deleted file mode 100644
index 928ccc6..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/stream/ext.conf
+++ /dev/null
@@ -1,11 +0,0 @@
-[stream]
-enabled = true
-protocols =
-    http
-    https
-    mms
-    rtmp
-    rtmps
-    rtsp
-timeout = 5000
-metadata_blacklist =
diff --git a/venv/lib/python3.7/site-packages/mopidy/zeroconf.py b/venv/lib/python3.7/site-packages/mopidy/zeroconf.py
deleted file mode 100644
index 9b57c99..0000000
--- a/venv/lib/python3.7/site-packages/mopidy/zeroconf.py
+++ /dev/null
@@ -1,150 +0,0 @@
-import logging
-import string
-
-logger = logging.getLogger(__name__)
-
-try:
-    import dbus
-except ImportError:
-    dbus = None
-
-_AVAHI_IF_UNSPEC = -1
-_AVAHI_PROTO_UNSPEC = -1
-_AVAHI_PUBLISHFLAGS_NONE = 0
-
-
-def _is_loopback_address(host):
-    return (
-        host.startswith("127.")
-        or host.startswith("::ffff:127.")
-        or host == "::1"
-    )
-
-
-def _convert_text_list_to_dbus_format(text_list):
-    array = dbus.Array(signature="ay")
-    for text in text_list:
-        array.append([dbus.Byte(ord(c)) for c in text])
-    return array
-
-
-class Zeroconf:
-
-    """Publish a network service with Zeroconf.
-
-    Currently, this only works on Linux using Avahi via D-Bus.
-
-    :param str name: human readable name of the service, e.g. 'MPD on neptune'
-    :param str stype: service type, e.g. '_mpd._tcp'
-    :param int port: TCP port of the service, e.g. 6600
-    :param str domain: local network domain name, defaults to ''
-    :param str host: interface to advertise the service on, defaults to ''
-    :param text: extra information depending on ``stype``, defaults to empty
-        list
-    :type text: list of str
-    """
-
-    def __init__(self, name, stype, port, domain="", host="", text=None):
-        self.stype = stype
-        self.port = port
-        self.domain = domain
-        self.host = host
-        self.text = text or []
-
-        self.bus = None
-        self.server = None
-        self.group = None
-        self.display_hostname = None
-        self.name = None
-
-        if dbus:
-            try:
-                self.bus = dbus.SystemBus()
-                self.server = dbus.Interface(
-                    self.bus.get_object("org.freedesktop.Avahi", "/"),
-                    "org.freedesktop.Avahi.Server",
-                )
-                self.display_hostname = f"{self.server.GetHostName()}"
-                self.name = string.Template(name).safe_substitute(
-                    hostname=self.display_hostname, port=port
-                )
-            except dbus.exceptions.DBusException as e:
-                logger.debug("%s: Server failed: %s", self, e)
-
-    def __str__(self):
-        return (
-            f"Zeroconf service {self.name!r} "
-            f"({self.stype} at [{self.host}]:{self.port:d})"
-        )
-
-    def publish(self):
-        """Publish the service.
-
-        Call when your service starts.
-        """
-
-        if _is_loopback_address(self.host):
-            logger.debug(
-                "%s: Publish on loopback interface is not supported.", self
-            )
-            return False
-
-        if not dbus:
-            logger.debug("%s: dbus not installed; publish failed.", self)
-            return False
-
-        if not self.bus:
-            logger.debug("%s: Bus not available; publish failed.", self)
-            return False
-
-        if not self.server:
-            logger.debug("%s: Server not available; publish failed.", self)
-            return False
-
-        try:
-            if not self.bus.name_has_owner("org.freedesktop.Avahi"):
-                logger.debug(
-                    "%s: Avahi service not running; publish failed.", self
-                )
-                return False
-
-            self.group = dbus.Interface(
-                self.bus.get_object(
-                    "org.freedesktop.Avahi", self.server.EntryGroupNew()
-                ),
-                "org.freedesktop.Avahi.EntryGroup",
-            )
-
-            self.group.AddService(
-                _AVAHI_IF_UNSPEC,
-                _AVAHI_PROTO_UNSPEC,
-                dbus.UInt32(_AVAHI_PUBLISHFLAGS_NONE),
-                self.name,
-                self.stype,
-                self.domain,
-                self.host,
-                dbus.UInt16(self.port),
-                _convert_text_list_to_dbus_format(self.text),
-            )
-
-            self.group.Commit()
-            logger.debug("%s: Published", self)
-            return True
-        except dbus.exceptions.DBusException as e:
-            logger.debug("%s: Publish failed: %s", self, e)
-            return False
-
-    def unpublish(self):
-        """Unpublish the service.
-
-        Call when your service shuts down.
-        """
-
-        if self.group:
-            try:
-                self.group.Reset()
-                logger.debug("%s: Unpublished", self)
-            except dbus.exceptions.DBusException as e:
-                logger.debug("%s: Unpublish failed: %s", self, e)
-            finally:
-                self.group = None
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/EGG-INFO/PKG-INFO b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/EGG-INFO/PKG-INFO
deleted file mode 100644
index 0b410a2..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/EGG-INFO/PKG-INFO
+++ /dev/null
@@ -1,73 +0,0 @@
-Metadata-Version: 1.2
-Name: pip
-Version: 19.0.3
-Summary: The PyPA recommended tool for installing Python packages.
-Home-page: https://pip.pypa.io/
-Author: The pip developers
-Author-email: pypa-dev@groups.google.com
-License: MIT
-Description: pip - The Python Package Installer
-        ==================================
-        
-        .. image:: https://img.shields.io/pypi/v/pip.svg
-           :target: https://pypi.org/project/pip/
-        
-        .. image:: https://readthedocs.org/projects/pip/badge/?version=latest
-           :target: https://pip.pypa.io/en/latest
-        
-        pip is the `package installer`_ for Python. You can use pip to install packages from the `Python Package Index`_ and other indexes.
-        
-        Please take a look at our documentation for how to install and use pip:
-        
-        * `Installation`_
-        * `Usage`_
-        * `Release notes`_
-        
-        If you find bugs, need help, or want to talk to the developers please use our mailing lists or chat rooms:
-        
-        * `Issue tracking`_
-        * `Discourse channel`_
-        * `User IRC`_
-        
-        If you want to get involved head over to GitHub to get the source code and feel free to jump on the developer mailing lists and chat rooms:
-        
-        * `GitHub page`_
-        * `Dev mailing list`_
-        * `Dev IRC`_
-        
-        Code of Conduct
-        ---------------
-        
-        Everyone interacting in the pip project's codebases, issue trackers, chat
-        rooms, and mailing lists is expected to follow the `PyPA Code of Conduct`_.
-        
-        .. _package installer: https://packaging.python.org/en/latest/current/
-        .. _Python Package Index: https://pypi.org
-        .. _Installation: https://pip.pypa.io/en/stable/installing.html
-        .. _Usage: https://pip.pypa.io/en/stable/
-        .. _Release notes: https://pip.pypa.io/en/stable/news.html
-        .. _GitHub page: https://github.com/pypa/pip
-        .. _Issue tracking: https://github.com/pypa/pip/issues
-        .. _Discourse channel: https://discuss.python.org/c/packaging
-        .. _Dev mailing list: https://groups.google.com/forum/#!forum/pypa-dev
-        .. _User IRC: https://webchat.freenode.net/?channels=%23pypa
-        .. _Dev IRC: https://webchat.freenode.net/?channels=%23pypa-dev
-        .. _PyPA Code of Conduct: https://www.pypa.io/en/latest/code-of-conduct/
-        
-Keywords: distutils easy_install egg setuptools wheel virtualenv
-Platform: UNKNOWN
-Classifier: Development Status :: 5 - Production/Stable
-Classifier: Intended Audience :: Developers
-Classifier: License :: OSI Approved :: MIT License
-Classifier: Topic :: Software Development :: Build Tools
-Classifier: Programming Language :: Python
-Classifier: Programming Language :: Python :: 2
-Classifier: Programming Language :: Python :: 2.7
-Classifier: Programming Language :: Python :: 3
-Classifier: Programming Language :: Python :: 3.4
-Classifier: Programming Language :: Python :: 3.5
-Classifier: Programming Language :: Python :: 3.6
-Classifier: Programming Language :: Python :: 3.7
-Classifier: Programming Language :: Python :: Implementation :: CPython
-Classifier: Programming Language :: Python :: Implementation :: PyPy
-Requires-Python: >=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/EGG-INFO/SOURCES.txt b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/EGG-INFO/SOURCES.txt
deleted file mode 100644
index eb4810d..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/EGG-INFO/SOURCES.txt
+++ /dev/null
@@ -1,391 +0,0 @@
-AUTHORS.txt
-LICENSE.txt
-MANIFEST.in
-NEWS.rst
-README.rst
-pyproject.toml
-setup.cfg
-setup.py
-docs/pip_sphinxext.py
-docs/html/conf.py
-docs/html/cookbook.rst
-docs/html/index.rst
-docs/html/installing.rst
-docs/html/logic.rst
-docs/html/news.rst
-docs/html/quickstart.rst
-docs/html/usage.rst
-docs/html/user_guide.rst
-docs/html/development/configuration.rst
-docs/html/development/contributing.rst
-docs/html/development/getting-started.rst
-docs/html/development/index.rst
-docs/html/development/release-process.rst
-docs/html/development/vendoring-policy.rst
-docs/html/reference/index.rst
-docs/html/reference/pip.rst
-docs/html/reference/pip_check.rst
-docs/html/reference/pip_config.rst
-docs/html/reference/pip_download.rst
-docs/html/reference/pip_freeze.rst
-docs/html/reference/pip_hash.rst
-docs/html/reference/pip_install.rst
-docs/html/reference/pip_list.rst
-docs/html/reference/pip_search.rst
-docs/html/reference/pip_show.rst
-docs/html/reference/pip_uninstall.rst
-docs/html/reference/pip_wheel.rst
-docs/man/index.rst
-docs/man/commands/check.rst
-docs/man/commands/config.rst
-docs/man/commands/download.rst
-docs/man/commands/freeze.rst
-docs/man/commands/hash.rst
-docs/man/commands/help.rst
-docs/man/commands/install.rst
-docs/man/commands/list.rst
-docs/man/commands/search.rst
-docs/man/commands/show.rst
-docs/man/commands/uninstall.rst
-docs/man/commands/wheel.rst
-src/pip/__init__.py
-src/pip/__main__.py
-src/pip.egg-info/PKG-INFO
-src/pip.egg-info/SOURCES.txt
-src/pip.egg-info/dependency_links.txt
-src/pip.egg-info/entry_points.txt
-src/pip.egg-info/not-zip-safe
-src/pip.egg-info/top_level.txt
-src/pip/_internal/__init__.py
-src/pip/_internal/build_env.py
-src/pip/_internal/cache.py
-src/pip/_internal/configuration.py
-src/pip/_internal/download.py
-src/pip/_internal/exceptions.py
-src/pip/_internal/index.py
-src/pip/_internal/locations.py
-src/pip/_internal/pep425tags.py
-src/pip/_internal/pyproject.py
-src/pip/_internal/resolve.py
-src/pip/_internal/wheel.py
-src/pip/_internal/cli/__init__.py
-src/pip/_internal/cli/autocompletion.py
-src/pip/_internal/cli/base_command.py
-src/pip/_internal/cli/cmdoptions.py
-src/pip/_internal/cli/main_parser.py
-src/pip/_internal/cli/parser.py
-src/pip/_internal/cli/status_codes.py
-src/pip/_internal/commands/__init__.py
-src/pip/_internal/commands/check.py
-src/pip/_internal/commands/completion.py
-src/pip/_internal/commands/configuration.py
-src/pip/_internal/commands/download.py
-src/pip/_internal/commands/freeze.py
-src/pip/_internal/commands/hash.py
-src/pip/_internal/commands/help.py
-src/pip/_internal/commands/install.py
-src/pip/_internal/commands/list.py
-src/pip/_internal/commands/search.py
-src/pip/_internal/commands/show.py
-src/pip/_internal/commands/uninstall.py
-src/pip/_internal/commands/wheel.py
-src/pip/_internal/models/__init__.py
-src/pip/_internal/models/candidate.py
-src/pip/_internal/models/format_control.py
-src/pip/_internal/models/index.py
-src/pip/_internal/models/link.py
-src/pip/_internal/operations/__init__.py
-src/pip/_internal/operations/check.py
-src/pip/_internal/operations/freeze.py
-src/pip/_internal/operations/prepare.py
-src/pip/_internal/req/__init__.py
-src/pip/_internal/req/constructors.py
-src/pip/_internal/req/req_file.py
-src/pip/_internal/req/req_install.py
-src/pip/_internal/req/req_set.py
-src/pip/_internal/req/req_tracker.py
-src/pip/_internal/req/req_uninstall.py
-src/pip/_internal/utils/__init__.py
-src/pip/_internal/utils/appdirs.py
-src/pip/_internal/utils/compat.py
-src/pip/_internal/utils/deprecation.py
-src/pip/_internal/utils/encoding.py
-src/pip/_internal/utils/filesystem.py
-src/pip/_internal/utils/glibc.py
-src/pip/_internal/utils/hashes.py
-src/pip/_internal/utils/logging.py
-src/pip/_internal/utils/misc.py
-src/pip/_internal/utils/models.py
-src/pip/_internal/utils/outdated.py
-src/pip/_internal/utils/packaging.py
-src/pip/_internal/utils/setuptools_build.py
-src/pip/_internal/utils/temp_dir.py
-src/pip/_internal/utils/typing.py
-src/pip/_internal/utils/ui.py
-src/pip/_internal/vcs/__init__.py
-src/pip/_internal/vcs/bazaar.py
-src/pip/_internal/vcs/git.py
-src/pip/_internal/vcs/mercurial.py
-src/pip/_internal/vcs/subversion.py
-src/pip/_vendor/README.rst
-src/pip/_vendor/__init__.py
-src/pip/_vendor/appdirs.LICENSE.txt
-src/pip/_vendor/appdirs.py
-src/pip/_vendor/distro.LICENSE
-src/pip/_vendor/distro.py
-src/pip/_vendor/ipaddress.LICENSE
-src/pip/_vendor/ipaddress.py
-src/pip/_vendor/pyparsing.LICENSE
-src/pip/_vendor/pyparsing.py
-src/pip/_vendor/retrying.LICENSE
-src/pip/_vendor/retrying.py
-src/pip/_vendor/six.LICENSE
-src/pip/_vendor/six.py
-src/pip/_vendor/vendor.txt
-src/pip/_vendor/cachecontrol/LICENSE.txt
-src/pip/_vendor/cachecontrol/__init__.py
-src/pip/_vendor/cachecontrol/_cmd.py
-src/pip/_vendor/cachecontrol/adapter.py
-src/pip/_vendor/cachecontrol/cache.py
-src/pip/_vendor/cachecontrol/compat.py
-src/pip/_vendor/cachecontrol/controller.py
-src/pip/_vendor/cachecontrol/filewrapper.py
-src/pip/_vendor/cachecontrol/heuristics.py
-src/pip/_vendor/cachecontrol/serialize.py
-src/pip/_vendor/cachecontrol/wrapper.py
-src/pip/_vendor/cachecontrol/caches/__init__.py
-src/pip/_vendor/cachecontrol/caches/file_cache.py
-src/pip/_vendor/cachecontrol/caches/redis_cache.py
-src/pip/_vendor/certifi/LICENSE
-src/pip/_vendor/certifi/__init__.py
-src/pip/_vendor/certifi/__main__.py
-src/pip/_vendor/certifi/cacert.pem
-src/pip/_vendor/certifi/core.py
-src/pip/_vendor/chardet/LICENSE
-src/pip/_vendor/chardet/__init__.py
-src/pip/_vendor/chardet/big5freq.py
-src/pip/_vendor/chardet/big5prober.py
-src/pip/_vendor/chardet/chardistribution.py
-src/pip/_vendor/chardet/charsetgroupprober.py
-src/pip/_vendor/chardet/charsetprober.py
-src/pip/_vendor/chardet/codingstatemachine.py
-src/pip/_vendor/chardet/compat.py
-src/pip/_vendor/chardet/cp949prober.py
-src/pip/_vendor/chardet/enums.py
-src/pip/_vendor/chardet/escprober.py
-src/pip/_vendor/chardet/escsm.py
-src/pip/_vendor/chardet/eucjpprober.py
-src/pip/_vendor/chardet/euckrfreq.py
-src/pip/_vendor/chardet/euckrprober.py
-src/pip/_vendor/chardet/euctwfreq.py
-src/pip/_vendor/chardet/euctwprober.py
-src/pip/_vendor/chardet/gb2312freq.py
-src/pip/_vendor/chardet/gb2312prober.py
-src/pip/_vendor/chardet/hebrewprober.py
-src/pip/_vendor/chardet/jisfreq.py
-src/pip/_vendor/chardet/jpcntx.py
-src/pip/_vendor/chardet/langbulgarianmodel.py
-src/pip/_vendor/chardet/langcyrillicmodel.py
-src/pip/_vendor/chardet/langgreekmodel.py
-src/pip/_vendor/chardet/langhebrewmodel.py
-src/pip/_vendor/chardet/langhungarianmodel.py
-src/pip/_vendor/chardet/langthaimodel.py
-src/pip/_vendor/chardet/langturkishmodel.py
-src/pip/_vendor/chardet/latin1prober.py
-src/pip/_vendor/chardet/mbcharsetprober.py
-src/pip/_vendor/chardet/mbcsgroupprober.py
-src/pip/_vendor/chardet/mbcssm.py
-src/pip/_vendor/chardet/sbcharsetprober.py
-src/pip/_vendor/chardet/sbcsgroupprober.py
-src/pip/_vendor/chardet/sjisprober.py
-src/pip/_vendor/chardet/universaldetector.py
-src/pip/_vendor/chardet/utf8prober.py
-src/pip/_vendor/chardet/version.py
-src/pip/_vendor/chardet/cli/__init__.py
-src/pip/_vendor/chardet/cli/chardetect.py
-src/pip/_vendor/colorama/LICENSE.txt
-src/pip/_vendor/colorama/__init__.py
-src/pip/_vendor/colorama/ansi.py
-src/pip/_vendor/colorama/ansitowin32.py
-src/pip/_vendor/colorama/initialise.py
-src/pip/_vendor/colorama/win32.py
-src/pip/_vendor/colorama/winterm.py
-src/pip/_vendor/distlib/LICENSE.txt
-src/pip/_vendor/distlib/__init__.py
-src/pip/_vendor/distlib/compat.py
-src/pip/_vendor/distlib/database.py
-src/pip/_vendor/distlib/index.py
-src/pip/_vendor/distlib/locators.py
-src/pip/_vendor/distlib/manifest.py
-src/pip/_vendor/distlib/markers.py
-src/pip/_vendor/distlib/metadata.py
-src/pip/_vendor/distlib/resources.py
-src/pip/_vendor/distlib/scripts.py
-src/pip/_vendor/distlib/t32.exe
-src/pip/_vendor/distlib/t64.exe
-src/pip/_vendor/distlib/util.py
-src/pip/_vendor/distlib/version.py
-src/pip/_vendor/distlib/w32.exe
-src/pip/_vendor/distlib/w64.exe
-src/pip/_vendor/distlib/wheel.py
-src/pip/_vendor/distlib/_backport/__init__.py
-src/pip/_vendor/distlib/_backport/misc.py
-src/pip/_vendor/distlib/_backport/shutil.py
-src/pip/_vendor/distlib/_backport/sysconfig.cfg
-src/pip/_vendor/distlib/_backport/sysconfig.py
-src/pip/_vendor/distlib/_backport/tarfile.py
-src/pip/_vendor/html5lib/LICENSE
-src/pip/_vendor/html5lib/__init__.py
-src/pip/_vendor/html5lib/_ihatexml.py
-src/pip/_vendor/html5lib/_inputstream.py
-src/pip/_vendor/html5lib/_tokenizer.py
-src/pip/_vendor/html5lib/_utils.py
-src/pip/_vendor/html5lib/constants.py
-src/pip/_vendor/html5lib/html5parser.py
-src/pip/_vendor/html5lib/serializer.py
-src/pip/_vendor/html5lib/_trie/__init__.py
-src/pip/_vendor/html5lib/_trie/_base.py
-src/pip/_vendor/html5lib/_trie/datrie.py
-src/pip/_vendor/html5lib/_trie/py.py
-src/pip/_vendor/html5lib/filters/__init__.py
-src/pip/_vendor/html5lib/filters/alphabeticalattributes.py
-src/pip/_vendor/html5lib/filters/base.py
-src/pip/_vendor/html5lib/filters/inject_meta_charset.py
-src/pip/_vendor/html5lib/filters/lint.py
-src/pip/_vendor/html5lib/filters/optionaltags.py
-src/pip/_vendor/html5lib/filters/sanitizer.py
-src/pip/_vendor/html5lib/filters/whitespace.py
-src/pip/_vendor/html5lib/treeadapters/__init__.py
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-src/pip/_vendor/html5lib/treebuilders/base.py
-src/pip/_vendor/html5lib/treebuilders/dom.py
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-src/pip/_vendor/html5lib/treebuilders/etree_lxml.py
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-src/pip/_vendor/html5lib/treewalkers/dom.py
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-src/pip/_vendor/idna/idnadata.py
-src/pip/_vendor/idna/intranges.py
-src/pip/_vendor/idna/package_data.py
-src/pip/_vendor/idna/uts46data.py
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-src/pip/_vendor/lockfile/__init__.py
-src/pip/_vendor/lockfile/linklockfile.py
-src/pip/_vendor/lockfile/mkdirlockfile.py
-src/pip/_vendor/lockfile/pidlockfile.py
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-src/pip/_vendor/msgpack/__init__.py
-src/pip/_vendor/msgpack/_version.py
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-src/pip/_vendor/packaging/LICENSE
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-src/pip/_vendor/packaging/LICENSE.BSD
-src/pip/_vendor/packaging/__about__.py
-src/pip/_vendor/packaging/__init__.py
-src/pip/_vendor/packaging/_compat.py
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-src/pip/_vendor/packaging/markers.py
-src/pip/_vendor/packaging/requirements.py
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-src/pip/_vendor/pep517/_in_process.py
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-src/pip/_vendor/requests/LICENSE
-src/pip/_vendor/requests/__init__.py
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-src/pip/_vendor/requests/_internal_utils.py
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-src/pip/_vendor/requests/certs.py
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-src/pip/_vendor/requests/hooks.py
-src/pip/_vendor/requests/models.py
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-src/pip/_vendor/requests/sessions.py
-src/pip/_vendor/requests/status_codes.py
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-src/pip/_vendor/urllib3/__init__.py
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-src/pip/_vendor/urllib3/contrib/pyopenssl.py
-src/pip/_vendor/urllib3/contrib/securetransport.py
-src/pip/_vendor/urllib3/contrib/socks.py
-src/pip/_vendor/urllib3/contrib/_securetransport/__init__.py
-src/pip/_vendor/urllib3/contrib/_securetransport/bindings.py
-src/pip/_vendor/urllib3/contrib/_securetransport/low_level.py
-src/pip/_vendor/urllib3/packages/__init__.py
-src/pip/_vendor/urllib3/packages/six.py
-src/pip/_vendor/urllib3/packages/backports/__init__.py
-src/pip/_vendor/urllib3/packages/backports/makefile.py
-src/pip/_vendor/urllib3/packages/ssl_match_hostname/__init__.py
-src/pip/_vendor/urllib3/packages/ssl_match_hostname/_implementation.py
-src/pip/_vendor/urllib3/util/__init__.py
-src/pip/_vendor/urllib3/util/connection.py
-src/pip/_vendor/urllib3/util/queue.py
-src/pip/_vendor/urllib3/util/request.py
-src/pip/_vendor/urllib3/util/response.py
-src/pip/_vendor/urllib3/util/retry.py
-src/pip/_vendor/urllib3/util/ssl_.py
-src/pip/_vendor/urllib3/util/timeout.py
-src/pip/_vendor/urllib3/util/url.py
-src/pip/_vendor/urllib3/util/wait.py
-src/pip/_vendor/webencodings/LICENSE
-src/pip/_vendor/webencodings/__init__.py
-src/pip/_vendor/webencodings/labels.py
-src/pip/_vendor/webencodings/mklabels.py
-src/pip/_vendor/webencodings/tests.py
-src/pip/_vendor/webencodings/x_user_defined.py
\ No newline at end of file
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/EGG-INFO/dependency_links.txt b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/EGG-INFO/dependency_links.txt
deleted file mode 100644
index 8b13789..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/EGG-INFO/dependency_links.txt
+++ /dev/null
@@ -1 +0,0 @@
-
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/EGG-INFO/entry_points.txt b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/EGG-INFO/entry_points.txt
deleted file mode 100644
index f5809cb..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/EGG-INFO/entry_points.txt
+++ /dev/null
@@ -1,5 +0,0 @@
-[console_scripts]
-pip = pip._internal:main
-pip3 = pip._internal:main
-pip3.7 = pip._internal:main
-
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/EGG-INFO/not-zip-safe b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/EGG-INFO/not-zip-safe
deleted file mode 100644
index 8b13789..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/EGG-INFO/not-zip-safe
+++ /dev/null
@@ -1 +0,0 @@
-
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/EGG-INFO/top_level.txt b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/EGG-INFO/top_level.txt
deleted file mode 100644
index a1b589e..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/EGG-INFO/top_level.txt
+++ /dev/null
@@ -1 +0,0 @@
-pip
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/__init__.py
deleted file mode 100644
index f48c1ca..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/__init__.py
+++ /dev/null
@@ -1 +0,0 @@
-__version__ = "19.0.3"
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/__main__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/__main__.py
deleted file mode 100644
index 0c223f8..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/__main__.py
+++ /dev/null
@@ -1,19 +0,0 @@
-from __future__ import absolute_import
-
-import os
-import sys
-
-# If we are running from a wheel, add the wheel to sys.path
-# This allows the usage python pip-*.whl/pip install pip-*.whl
-if __package__ == '':
-    # __file__ is pip-*.whl/pip/__main__.py
-    # first dirname call strips of '/__main__.py', second strips off '/pip'
-    # Resulting path is the name of the wheel itself
-    # Add that to sys.path so we can import pip
-    path = os.path.dirname(os.path.dirname(__file__))
-    sys.path.insert(0, path)
-
-from pip._internal import main as _main  # isort:skip # noqa
-
-if __name__ == '__main__':
-    sys.exit(_main())
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/__init__.py
deleted file mode 100644
index 276124d..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/__init__.py
+++ /dev/null
@@ -1,78 +0,0 @@
-#!/usr/bin/env python
-from __future__ import absolute_import
-
-import locale
-import logging
-import os
-import warnings
-
-import sys
-
-# 2016-06-17 barry@debian.org: urllib3 1.14 added optional support for socks,
-# but if invoked (i.e. imported), it will issue a warning to stderr if socks
-# isn't available.  requests unconditionally imports urllib3's socks contrib
-# module, triggering this warning.  The warning breaks DEP-8 tests (because of
-# the stderr output) and is just plain annoying in normal usage.  I don't want
-# to add socks as yet another dependency for pip, nor do I want to allow-stder
-# in the DEP-8 tests, so just suppress the warning.  pdb tells me this has to
-# be done before the import of pip.vcs.
-from pip._vendor.urllib3.exceptions import DependencyWarning
-warnings.filterwarnings("ignore", category=DependencyWarning)  # noqa
-
-# We want to inject the use of SecureTransport as early as possible so that any
-# references or sessions or what have you are ensured to have it, however we
-# only want to do this in the case that we're running on macOS and the linked
-# OpenSSL is too old to handle TLSv1.2
-try:
-    import ssl
-except ImportError:
-    pass
-else:
-    # Checks for OpenSSL 1.0.1 on MacOS
-    if sys.platform == "darwin" and ssl.OPENSSL_VERSION_NUMBER < 0x1000100f:
-        try:
-            from pip._vendor.urllib3.contrib import securetransport
-        except (ImportError, OSError):
-            pass
-        else:
-            securetransport.inject_into_urllib3()
-
-from pip._internal.cli.autocompletion import autocomplete
-from pip._internal.cli.main_parser import parse_command
-from pip._internal.commands import commands_dict
-from pip._internal.exceptions import PipError
-from pip._internal.utils import deprecation
-from pip._internal.vcs import git, mercurial, subversion, bazaar  # noqa
-from pip._vendor.urllib3.exceptions import InsecureRequestWarning
-
-logger = logging.getLogger(__name__)
-
-# Hide the InsecureRequestWarning from urllib3
-warnings.filterwarnings("ignore", category=InsecureRequestWarning)
-
-
-def main(args=None):
-    if args is None:
-        args = sys.argv[1:]
-
-    # Configure our deprecation warnings to be sent through loggers
-    deprecation.install_warning_logger()
-
-    autocomplete()
-
-    try:
-        cmd_name, cmd_args = parse_command(args)
-    except PipError as exc:
-        sys.stderr.write("ERROR: %s" % exc)
-        sys.stderr.write(os.linesep)
-        sys.exit(1)
-
-    # Needed for locale.getpreferredencoding(False) to work
-    # in pip._internal.utils.encoding.auto_decode
-    try:
-        locale.setlocale(locale.LC_ALL, '')
-    except locale.Error as e:
-        # setlocale can apparently crash if locale are uninitialized
-        logger.debug("Ignoring error %s when setting locale", e)
-    command = commands_dict[cmd_name](isolated=("--isolated" in cmd_args))
-    return command.main(cmd_args)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/build_env.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/build_env.py
deleted file mode 100644
index d744cc7..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/build_env.py
+++ /dev/null
@@ -1,215 +0,0 @@
-"""Build Environment used for isolation during sdist building
-"""
-
-import logging
-import os
-import sys
-import textwrap
-from collections import OrderedDict
-from distutils.sysconfig import get_python_lib
-from sysconfig import get_paths
-
-from pip._vendor.pkg_resources import Requirement, VersionConflict, WorkingSet
-
-from pip import __file__ as pip_location
-from pip._internal.utils.misc import call_subprocess
-from pip._internal.utils.temp_dir import TempDirectory
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-from pip._internal.utils.ui import open_spinner
-
-if MYPY_CHECK_RUNNING:
-    from typing import Tuple, Set, Iterable, Optional, List  # noqa: F401
-    from pip._internal.index import PackageFinder  # noqa: F401
-
-logger = logging.getLogger(__name__)
-
-
-class _Prefix:
-
-    def __init__(self, path):
-        # type: (str) -> None
-        self.path = path
-        self.setup = False
-        self.bin_dir = get_paths(
-            'nt' if os.name == 'nt' else 'posix_prefix',
-            vars={'base': path, 'platbase': path}
-        )['scripts']
-        # Note: prefer distutils' sysconfig to get the
-        # library paths so PyPy is correctly supported.
-        purelib = get_python_lib(plat_specific=False, prefix=path)
-        platlib = get_python_lib(plat_specific=True, prefix=path)
-        if purelib == platlib:
-            self.lib_dirs = [purelib]
-        else:
-            self.lib_dirs = [purelib, platlib]
-
-
-class BuildEnvironment(object):
-    """Creates and manages an isolated environment to install build deps
-    """
-
-    def __init__(self):
-        # type: () -> None
-        self._temp_dir = TempDirectory(kind="build-env")
-        self._temp_dir.create()
-
-        self._prefixes = OrderedDict((
-            (name, _Prefix(os.path.join(self._temp_dir.path, name)))
-            for name in ('normal', 'overlay')
-        ))
-
-        self._bin_dirs = []  # type: List[str]
-        self._lib_dirs = []  # type: List[str]
-        for prefix in reversed(list(self._prefixes.values())):
-            self._bin_dirs.append(prefix.bin_dir)
-            self._lib_dirs.extend(prefix.lib_dirs)
-
-        # Customize site to:
-        # - ensure .pth files are honored
-        # - prevent access to system site packages
-        system_sites = {
-            os.path.normcase(site) for site in (
-                get_python_lib(plat_specific=False),
-                get_python_lib(plat_specific=True),
-            )
-        }
-        self._site_dir = os.path.join(self._temp_dir.path, 'site')
-        if not os.path.exists(self._site_dir):
-            os.mkdir(self._site_dir)
-        with open(os.path.join(self._site_dir, 'sitecustomize.py'), 'w') as fp:
-            fp.write(textwrap.dedent(
-                '''
-                import os, site, sys
-
-                # First, drop system-sites related paths.
-                original_sys_path = sys.path[:]
-                known_paths = set()
-                for path in {system_sites!r}:
-                    site.addsitedir(path, known_paths=known_paths)
-                system_paths = set(
-                    os.path.normcase(path)
-                    for path in sys.path[len(original_sys_path):]
-                )
-                original_sys_path = [
-                    path for path in original_sys_path
-                    if os.path.normcase(path) not in system_paths
-                ]
-                sys.path = original_sys_path
-
-                # Second, add lib directories.
-                # ensuring .pth file are processed.
-                for path in {lib_dirs!r}:
-                    assert not path in sys.path
-                    site.addsitedir(path)
-                '''
-            ).format(system_sites=system_sites, lib_dirs=self._lib_dirs))
-
-    def __enter__(self):
-        self._save_env = {
-            name: os.environ.get(name, None)
-            for name in ('PATH', 'PYTHONNOUSERSITE', 'PYTHONPATH')
-        }
-
-        path = self._bin_dirs[:]
-        old_path = self._save_env['PATH']
-        if old_path:
-            path.extend(old_path.split(os.pathsep))
-
-        pythonpath = [self._site_dir]
-
-        os.environ.update({
-            'PATH': os.pathsep.join(path),
-            'PYTHONNOUSERSITE': '1',
-            'PYTHONPATH': os.pathsep.join(pythonpath),
-        })
-
-    def __exit__(self, exc_type, exc_val, exc_tb):
-        for varname, old_value in self._save_env.items():
-            if old_value is None:
-                os.environ.pop(varname, None)
-            else:
-                os.environ[varname] = old_value
-
-    def cleanup(self):
-        # type: () -> None
-        self._temp_dir.cleanup()
-
-    def check_requirements(self, reqs):
-        # type: (Iterable[str]) -> Tuple[Set[Tuple[str, str]], Set[str]]
-        """Return 2 sets:
-            - conflicting requirements: set of (installed, wanted) reqs tuples
-            - missing requirements: set of reqs
-        """
-        missing = set()
-        conflicting = set()
-        if reqs:
-            ws = WorkingSet(self._lib_dirs)
-            for req in reqs:
-                try:
-                    if ws.find(Requirement.parse(req)) is None:
-                        missing.add(req)
-                except VersionConflict as e:
-                    conflicting.add((str(e.args[0].as_requirement()),
-                                     str(e.args[1])))
-        return conflicting, missing
-
-    def install_requirements(
-        self,
-        finder,  # type: PackageFinder
-        requirements,  # type: Iterable[str]
-        prefix_as_string,  # type: str
-        message  # type: Optional[str]
-    ):
-        # type: (...) -> None
-        prefix = self._prefixes[prefix_as_string]
-        assert not prefix.setup
-        prefix.setup = True
-        if not requirements:
-            return
-        args = [
-            sys.executable, os.path.dirname(pip_location), 'install',
-            '--ignore-installed', '--no-user', '--prefix', prefix.path,
-            '--no-warn-script-location',
-        ]  # type: List[str]
-        if logger.getEffectiveLevel() <= logging.DEBUG:
-            args.append('-v')
-        for format_control in ('no_binary', 'only_binary'):
-            formats = getattr(finder.format_control, format_control)
-            args.extend(('--' + format_control.replace('_', '-'),
-                         ','.join(sorted(formats or {':none:'}))))
-        if finder.index_urls:
-            args.extend(['-i', finder.index_urls[0]])
-            for extra_index in finder.index_urls[1:]:
-                args.extend(['--extra-index-url', extra_index])
-        else:
-            args.append('--no-index')
-        for link in finder.find_links:
-            args.extend(['--find-links', link])
-        for _, host, _ in finder.secure_origins:
-            args.extend(['--trusted-host', host])
-        if finder.allow_all_prereleases:
-            args.append('--pre')
-        args.append('--')
-        args.extend(requirements)
-        with open_spinner(message) as spinner:
-            call_subprocess(args, show_stdout=False, spinner=spinner)
-
-
-class NoOpBuildEnvironment(BuildEnvironment):
-    """A no-op drop-in replacement for BuildEnvironment
-    """
-
-    def __init__(self):
-        pass
-
-    def __enter__(self):
-        pass
-
-    def __exit__(self, exc_type, exc_val, exc_tb):
-        pass
-
-    def cleanup(self):
-        pass
-
-    def install_requirements(self, finder, requirements, prefix, message):
-        raise NotImplementedError()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/cache.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/cache.py
deleted file mode 100644
index eb295c4..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/cache.py
+++ /dev/null
@@ -1,224 +0,0 @@
-"""Cache Management
-"""
-
-import errno
-import hashlib
-import logging
-import os
-
-from pip._vendor.packaging.utils import canonicalize_name
-
-from pip._internal.download import path_to_url
-from pip._internal.models.link import Link
-from pip._internal.utils.compat import expanduser
-from pip._internal.utils.temp_dir import TempDirectory
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-from pip._internal.wheel import InvalidWheelFilename, Wheel
-
-if MYPY_CHECK_RUNNING:
-    from typing import Optional, Set, List, Any  # noqa: F401
-    from pip._internal.index import FormatControl  # noqa: F401
-
-logger = logging.getLogger(__name__)
-
-
-class Cache(object):
-    """An abstract class - provides cache directories for data from links
-
-
-        :param cache_dir: The root of the cache.
-        :param format_control: An object of FormatControl class to limit
-            binaries being read from the cache.
-        :param allowed_formats: which formats of files the cache should store.
-            ('binary' and 'source' are the only allowed values)
-    """
-
-    def __init__(self, cache_dir, format_control, allowed_formats):
-        # type: (str, FormatControl, Set[str]) -> None
-        super(Cache, self).__init__()
-        self.cache_dir = expanduser(cache_dir) if cache_dir else None
-        self.format_control = format_control
-        self.allowed_formats = allowed_formats
-
-        _valid_formats = {"source", "binary"}
-        assert self.allowed_formats.union(_valid_formats) == _valid_formats
-
-    def _get_cache_path_parts(self, link):
-        # type: (Link) -> List[str]
-        """Get parts of part that must be os.path.joined with cache_dir
-        """
-
-        # We want to generate an url to use as our cache key, we don't want to
-        # just re-use the URL because it might have other items in the fragment
-        # and we don't care about those.
-        key_parts = [link.url_without_fragment]
-        if link.hash_name is not None and link.hash is not None:
-            key_parts.append("=".join([link.hash_name, link.hash]))
-        key_url = "#".join(key_parts)
-
-        # Encode our key url with sha224, we'll use this because it has similar
-        # security properties to sha256, but with a shorter total output (and
-        # thus less secure). However the differences don't make a lot of
-        # difference for our use case here.
-        hashed = hashlib.sha224(key_url.encode()).hexdigest()
-
-        # We want to nest the directories some to prevent having a ton of top
-        # level directories where we might run out of sub directories on some
-        # FS.
-        parts = [hashed[:2], hashed[2:4], hashed[4:6], hashed[6:]]
-
-        return parts
-
-    def _get_candidates(self, link, package_name):
-        # type: (Link, Optional[str]) -> List[Any]
-        can_not_cache = (
-            not self.cache_dir or
-            not package_name or
-            not link
-        )
-        if can_not_cache:
-            return []
-
-        canonical_name = canonicalize_name(package_name)
-        formats = self.format_control.get_allowed_formats(
-            canonical_name
-        )
-        if not self.allowed_formats.intersection(formats):
-            return []
-
-        root = self.get_path_for_link(link)
-        try:
-            return os.listdir(root)
-        except OSError as err:
-            if err.errno in {errno.ENOENT, errno.ENOTDIR}:
-                return []
-            raise
-
-    def get_path_for_link(self, link):
-        # type: (Link) -> str
-        """Return a directory to store cached items in for link.
-        """
-        raise NotImplementedError()
-
-    def get(self, link, package_name):
-        # type: (Link, Optional[str]) -> Link
-        """Returns a link to a cached item if it exists, otherwise returns the
-        passed link.
-        """
-        raise NotImplementedError()
-
-    def _link_for_candidate(self, link, candidate):
-        # type: (Link, str) -> Link
-        root = self.get_path_for_link(link)
-        path = os.path.join(root, candidate)
-
-        return Link(path_to_url(path))
-
-    def cleanup(self):
-        # type: () -> None
-        pass
-
-
-class SimpleWheelCache(Cache):
-    """A cache of wheels for future installs.
-    """
-
-    def __init__(self, cache_dir, format_control):
-        # type: (str, FormatControl) -> None
-        super(SimpleWheelCache, self).__init__(
-            cache_dir, format_control, {"binary"}
-        )
-
-    def get_path_for_link(self, link):
-        # type: (Link) -> str
-        """Return a directory to store cached wheels for link
-
-        Because there are M wheels for any one sdist, we provide a directory
-        to cache them in, and then consult that directory when looking up
-        cache hits.
-
-        We only insert things into the cache if they have plausible version
-        numbers, so that we don't contaminate the cache with things that were
-        not unique. E.g. ./package might have dozens of installs done for it
-        and build a version of 0.0...and if we built and cached a wheel, we'd
-        end up using the same wheel even if the source has been edited.
-
-        :param link: The link of the sdist for which this will cache wheels.
-        """
-        parts = self._get_cache_path_parts(link)
-
-        # Store wheels within the root cache_dir
-        return os.path.join(self.cache_dir, "wheels", *parts)
-
-    def get(self, link, package_name):
-        # type: (Link, Optional[str]) -> Link
-        candidates = []
-
-        for wheel_name in self._get_candidates(link, package_name):
-            try:
-                wheel = Wheel(wheel_name)
-            except InvalidWheelFilename:
-                continue
-            if not wheel.supported():
-                # Built for a different python/arch/etc
-                continue
-            candidates.append((wheel.support_index_min(), wheel_name))
-
-        if not candidates:
-            return link
-
-        return self._link_for_candidate(link, min(candidates)[1])
-
-
-class EphemWheelCache(SimpleWheelCache):
-    """A SimpleWheelCache that creates it's own temporary cache directory
-    """
-
-    def __init__(self, format_control):
-        # type: (FormatControl) -> None
-        self._temp_dir = TempDirectory(kind="ephem-wheel-cache")
-        self._temp_dir.create()
-
-        super(EphemWheelCache, self).__init__(
-            self._temp_dir.path, format_control
-        )
-
-    def cleanup(self):
-        # type: () -> None
-        self._temp_dir.cleanup()
-
-
-class WheelCache(Cache):
-    """Wraps EphemWheelCache and SimpleWheelCache into a single Cache
-
-    This Cache allows for gracefully degradation, using the ephem wheel cache
-    when a certain link is not found in the simple wheel cache first.
-    """
-
-    def __init__(self, cache_dir, format_control):
-        # type: (str, FormatControl) -> None
-        super(WheelCache, self).__init__(
-            cache_dir, format_control, {'binary'}
-        )
-        self._wheel_cache = SimpleWheelCache(cache_dir, format_control)
-        self._ephem_cache = EphemWheelCache(format_control)
-
-    def get_path_for_link(self, link):
-        # type: (Link) -> str
-        return self._wheel_cache.get_path_for_link(link)
-
-    def get_ephem_path_for_link(self, link):
-        # type: (Link) -> str
-        return self._ephem_cache.get_path_for_link(link)
-
-    def get(self, link, package_name):
-        # type: (Link, Optional[str]) -> Link
-        retval = self._wheel_cache.get(link, package_name)
-        if retval is link:
-            retval = self._ephem_cache.get(link, package_name)
-        return retval
-
-    def cleanup(self):
-        # type: () -> None
-        self._wheel_cache.cleanup()
-        self._ephem_cache.cleanup()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/cli/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/cli/__init__.py
deleted file mode 100644
index e589bb9..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/cli/__init__.py
+++ /dev/null
@@ -1,4 +0,0 @@
-"""Subpackage containing all of pip's command line interface related code
-"""
-
-# This file intentionally does not import submodules
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/cli/autocompletion.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/cli/autocompletion.py
deleted file mode 100644
index 0a04199..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/cli/autocompletion.py
+++ /dev/null
@@ -1,152 +0,0 @@
-"""Logic that powers autocompletion installed by ``pip completion``.
-"""
-
-import optparse
-import os
-import sys
-
-from pip._internal.cli.main_parser import create_main_parser
-from pip._internal.commands import commands_dict, get_summaries
-from pip._internal.utils.misc import get_installed_distributions
-
-
-def autocomplete():
-    """Entry Point for completion of main and subcommand options.
-    """
-    # Don't complete if user hasn't sourced bash_completion file.
-    if 'PIP_AUTO_COMPLETE' not in os.environ:
-        return
-    cwords = os.environ['COMP_WORDS'].split()[1:]
-    cword = int(os.environ['COMP_CWORD'])
-    try:
-        current = cwords[cword - 1]
-    except IndexError:
-        current = ''
-
-    subcommands = [cmd for cmd, summary in get_summaries()]
-    options = []
-    # subcommand
-    try:
-        subcommand_name = [w for w in cwords if w in subcommands][0]
-    except IndexError:
-        subcommand_name = None
-
-    parser = create_main_parser()
-    # subcommand options
-    if subcommand_name:
-        # special case: 'help' subcommand has no options
-        if subcommand_name == 'help':
-            sys.exit(1)
-        # special case: list locally installed dists for show and uninstall
-        should_list_installed = (
-            subcommand_name in ['show', 'uninstall'] and
-            not current.startswith('-')
-        )
-        if should_list_installed:
-            installed = []
-            lc = current.lower()
-            for dist in get_installed_distributions(local_only=True):
-                if dist.key.startswith(lc) and dist.key not in cwords[1:]:
-                    installed.append(dist.key)
-            # if there are no dists installed, fall back to option completion
-            if installed:
-                for dist in installed:
-                    print(dist)
-                sys.exit(1)
-
-        subcommand = commands_dict[subcommand_name]()
-
-        for opt in subcommand.parser.option_list_all:
-            if opt.help != optparse.SUPPRESS_HELP:
-                for opt_str in opt._long_opts + opt._short_opts:
-                    options.append((opt_str, opt.nargs))
-
-        # filter out previously specified options from available options
-        prev_opts = [x.split('=')[0] for x in cwords[1:cword - 1]]
-        options = [(x, v) for (x, v) in options if x not in prev_opts]
-        # filter options by current input
-        options = [(k, v) for k, v in options if k.startswith(current)]
-        # get completion type given cwords and available subcommand options
-        completion_type = get_path_completion_type(
-            cwords, cword, subcommand.parser.option_list_all,
-        )
-        # get completion files and directories if ``completion_type`` is
-        # ``<file>``, ``<dir>`` or ``<path>``
-        if completion_type:
-            options = auto_complete_paths(current, completion_type)
-            options = ((opt, 0) for opt in options)
-        for option in options:
-            opt_label = option[0]
-            # append '=' to options which require args
-            if option[1] and option[0][:2] == "--":
-                opt_label += '='
-            print(opt_label)
-    else:
-        # show main parser options only when necessary
-
-        opts = [i.option_list for i in parser.option_groups]
-        opts.append(parser.option_list)
-        opts = (o for it in opts for o in it)
-        if current.startswith('-'):
-            for opt in opts:
-                if opt.help != optparse.SUPPRESS_HELP:
-                    subcommands += opt._long_opts + opt._short_opts
-        else:
-            # get completion type given cwords and all available options
-            completion_type = get_path_completion_type(cwords, cword, opts)
-            if completion_type:
-                subcommands = auto_complete_paths(current, completion_type)
-
-        print(' '.join([x for x in subcommands if x.startswith(current)]))
-    sys.exit(1)
-
-
-def get_path_completion_type(cwords, cword, opts):
-    """Get the type of path completion (``file``, ``dir``, ``path`` or None)
-
-    :param cwords: same as the environmental variable ``COMP_WORDS``
-    :param cword: same as the environmental variable ``COMP_CWORD``
-    :param opts: The available options to check
-    :return: path completion type (``file``, ``dir``, ``path`` or None)
-    """
-    if cword < 2 or not cwords[cword - 2].startswith('-'):
-        return
-    for opt in opts:
-        if opt.help == optparse.SUPPRESS_HELP:
-            continue
-        for o in str(opt).split('/'):
-            if cwords[cword - 2].split('=')[0] == o:
-                if not opt.metavar or any(
-                        x in ('path', 'file', 'dir')
-                        for x in opt.metavar.split('/')):
-                    return opt.metavar
-
-
-def auto_complete_paths(current, completion_type):
-    """If ``completion_type`` is ``file`` or ``path``, list all regular files
-    and directories starting with ``current``; otherwise only list directories
-    starting with ``current``.
-
-    :param current: The word to be completed
-    :param completion_type: path completion type(`file`, `path` or `dir`)i
-    :return: A generator of regular files and/or directories
-    """
-    directory, filename = os.path.split(current)
-    current_path = os.path.abspath(directory)
-    # Don't complete paths if they can't be accessed
-    if not os.access(current_path, os.R_OK):
-        return
-    filename = os.path.normcase(filename)
-    # list all files that start with ``filename``
-    file_list = (x for x in os.listdir(current_path)
-                 if os.path.normcase(x).startswith(filename))
-    for f in file_list:
-        opt = os.path.join(current_path, f)
-        comp_file = os.path.normcase(os.path.join(directory, f))
-        # complete regular files when there is not ``<dir>`` after option
-        # complete directories when there is ``<file>``, ``<path>`` or
-        # ``<dir>``after option
-        if completion_type != 'dir' and os.path.isfile(opt):
-            yield comp_file
-        elif os.path.isdir(opt):
-            yield os.path.join(comp_file, '')
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/cli/base_command.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/cli/base_command.py
deleted file mode 100644
index 3ceea49..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/cli/base_command.py
+++ /dev/null
@@ -1,341 +0,0 @@
-"""Base Command class, and related routines"""
-from __future__ import absolute_import, print_function
-
-import logging
-import logging.config
-import optparse
-import os
-import platform
-import sys
-import traceback
-
-from pip._internal.cli import cmdoptions
-from pip._internal.cli.parser import (
-    ConfigOptionParser, UpdatingDefaultsHelpFormatter,
-)
-from pip._internal.cli.status_codes import (
-    ERROR, PREVIOUS_BUILD_DIR_ERROR, SUCCESS, UNKNOWN_ERROR,
-    VIRTUALENV_NOT_FOUND,
-)
-from pip._internal.download import PipSession
-from pip._internal.exceptions import (
-    BadCommand, CommandError, InstallationError, PreviousBuildDirError,
-    UninstallationError,
-)
-from pip._internal.index import PackageFinder
-from pip._internal.locations import running_under_virtualenv
-from pip._internal.req.constructors import (
-    install_req_from_editable, install_req_from_line,
-)
-from pip._internal.req.req_file import parse_requirements
-from pip._internal.utils.deprecation import deprecated
-from pip._internal.utils.logging import BrokenStdoutLoggingError, setup_logging
-from pip._internal.utils.misc import (
-    get_prog, normalize_path, redact_password_from_url,
-)
-from pip._internal.utils.outdated import pip_version_check
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if MYPY_CHECK_RUNNING:
-    from typing import Optional, List, Tuple, Any  # noqa: F401
-    from optparse import Values  # noqa: F401
-    from pip._internal.cache import WheelCache  # noqa: F401
-    from pip._internal.req.req_set import RequirementSet  # noqa: F401
-
-__all__ = ['Command']
-
-logger = logging.getLogger(__name__)
-
-
-class Command(object):
-    name = None  # type: Optional[str]
-    usage = None  # type: Optional[str]
-    hidden = False  # type: bool
-    ignore_require_venv = False  # type: bool
-
-    def __init__(self, isolated=False):
-        # type: (bool) -> None
-        parser_kw = {
-            'usage': self.usage,
-            'prog': '%s %s' % (get_prog(), self.name),
-            'formatter': UpdatingDefaultsHelpFormatter(),
-            'add_help_option': False,
-            'name': self.name,
-            'description': self.__doc__,
-            'isolated': isolated,
-        }
-
-        self.parser = ConfigOptionParser(**parser_kw)
-
-        # Commands should add options to this option group
-        optgroup_name = '%s Options' % self.name.capitalize()
-        self.cmd_opts = optparse.OptionGroup(self.parser, optgroup_name)
-
-        # Add the general options
-        gen_opts = cmdoptions.make_option_group(
-            cmdoptions.general_group,
-            self.parser,
-        )
-        self.parser.add_option_group(gen_opts)
-
-    def run(self, options, args):
-        # type: (Values, List[Any]) -> Any
-        raise NotImplementedError
-
-    def _build_session(self, options, retries=None, timeout=None):
-        # type: (Values, Optional[int], Optional[int]) -> PipSession
-        session = PipSession(
-            cache=(
-                normalize_path(os.path.join(options.cache_dir, "http"))
-                if options.cache_dir else None
-            ),
-            retries=retries if retries is not None else options.retries,
-            insecure_hosts=options.trusted_hosts,
-        )
-
-        # Handle custom ca-bundles from the user
-        if options.cert:
-            session.verify = options.cert
-
-        # Handle SSL client certificate
-        if options.client_cert:
-            session.cert = options.client_cert
-
-        # Handle timeouts
-        if options.timeout or timeout:
-            session.timeout = (
-                timeout if timeout is not None else options.timeout
-            )
-
-        # Handle configured proxies
-        if options.proxy:
-            session.proxies = {
-                "http": options.proxy,
-                "https": options.proxy,
-            }
-
-        # Determine if we can prompt the user for authentication or not
-        session.auth.prompting = not options.no_input
-
-        return session
-
-    def parse_args(self, args):
-        # type: (List[str]) -> Tuple
-        # factored out for testability
-        return self.parser.parse_args(args)
-
-    def main(self, args):
-        # type: (List[str]) -> int
-        options, args = self.parse_args(args)
-
-        # Set verbosity so that it can be used elsewhere.
-        self.verbosity = options.verbose - options.quiet
-
-        level_number = setup_logging(
-            verbosity=self.verbosity,
-            no_color=options.no_color,
-            user_log_file=options.log,
-        )
-
-        if sys.version_info[:2] == (3, 4):
-            deprecated(
-                "Python 3.4 support has been deprecated. pip 19.1 will be the "
-                "last one supporting it. Please upgrade your Python as Python "
-                "3.4 won't be maintained after March 2019 (cf PEP 429).",
-                replacement=None,
-                gone_in='19.2',
-            )
-        elif sys.version_info[:2] == (2, 7):
-            message = (
-                "A future version of pip will drop support for Python 2.7."
-            )
-            if platform.python_implementation() == "CPython":
-                message = (
-                    "Python 2.7 will reach the end of its life on January "
-                    "1st, 2020. Please upgrade your Python as Python 2.7 "
-                    "won't be maintained after that date. "
-                ) + message
-            deprecated(message, replacement=None, gone_in=None)
-
-        # TODO: Try to get these passing down from the command?
-        #       without resorting to os.environ to hold these.
-        #       This also affects isolated builds and it should.
-
-        if options.no_input:
-            os.environ['PIP_NO_INPUT'] = '1'
-
-        if options.exists_action:
-            os.environ['PIP_EXISTS_ACTION'] = ' '.join(options.exists_action)
-
-        if options.require_venv and not self.ignore_require_venv:
-            # If a venv is required check if it can really be found
-            if not running_under_virtualenv():
-                logger.critical(
-                    'Could not find an activated virtualenv (required).'
-                )
-                sys.exit(VIRTUALENV_NOT_FOUND)
-
-        try:
-            status = self.run(options, args)
-            # FIXME: all commands should return an exit status
-            # and when it is done, isinstance is not needed anymore
-            if isinstance(status, int):
-                return status
-        except PreviousBuildDirError as exc:
-            logger.critical(str(exc))
-            logger.debug('Exception information:', exc_info=True)
-
-            return PREVIOUS_BUILD_DIR_ERROR
-        except (InstallationError, UninstallationError, BadCommand) as exc:
-            logger.critical(str(exc))
-            logger.debug('Exception information:', exc_info=True)
-
-            return ERROR
-        except CommandError as exc:
-            logger.critical('ERROR: %s', exc)
-            logger.debug('Exception information:', exc_info=True)
-
-            return ERROR
-        except BrokenStdoutLoggingError:
-            # Bypass our logger and write any remaining messages to stderr
-            # because stdout no longer works.
-            print('ERROR: Pipe to stdout was broken', file=sys.stderr)
-            if level_number <= logging.DEBUG:
-                traceback.print_exc(file=sys.stderr)
-
-            return ERROR
-        except KeyboardInterrupt:
-            logger.critical('Operation cancelled by user')
-            logger.debug('Exception information:', exc_info=True)
-
-            return ERROR
-        except BaseException:
-            logger.critical('Exception:', exc_info=True)
-
-            return UNKNOWN_ERROR
-        finally:
-            allow_version_check = (
-                # Does this command have the index_group options?
-                hasattr(options, "no_index") and
-                # Is this command allowed to perform this check?
-                not (options.disable_pip_version_check or options.no_index)
-            )
-            # Check if we're using the latest version of pip available
-            if allow_version_check:
-                session = self._build_session(
-                    options,
-                    retries=0,
-                    timeout=min(5, options.timeout)
-                )
-                with session:
-                    pip_version_check(session, options)
-
-            # Shutdown the logging module
-            logging.shutdown()
-
-        return SUCCESS
-
-
-class RequirementCommand(Command):
-
-    @staticmethod
-    def populate_requirement_set(requirement_set,  # type: RequirementSet
-                                 args,             # type: List[str]
-                                 options,          # type: Values
-                                 finder,           # type: PackageFinder
-                                 session,          # type: PipSession
-                                 name,             # type: str
-                                 wheel_cache       # type: Optional[WheelCache]
-                                 ):
-        # type: (...) -> None
-        """
-        Marshal cmd line args into a requirement set.
-        """
-        # NOTE: As a side-effect, options.require_hashes and
-        #       requirement_set.require_hashes may be updated
-
-        for filename in options.constraints:
-            for req_to_add in parse_requirements(
-                    filename,
-                    constraint=True, finder=finder, options=options,
-                    session=session, wheel_cache=wheel_cache):
-                req_to_add.is_direct = True
-                requirement_set.add_requirement(req_to_add)
-
-        for req in args:
-            req_to_add = install_req_from_line(
-                req, None, isolated=options.isolated_mode,
-                use_pep517=options.use_pep517,
-                wheel_cache=wheel_cache
-            )
-            req_to_add.is_direct = True
-            requirement_set.add_requirement(req_to_add)
-
-        for req in options.editables:
-            req_to_add = install_req_from_editable(
-                req,
-                isolated=options.isolated_mode,
-                use_pep517=options.use_pep517,
-                wheel_cache=wheel_cache
-            )
-            req_to_add.is_direct = True
-            requirement_set.add_requirement(req_to_add)
-
-        for filename in options.requirements:
-            for req_to_add in parse_requirements(
-                    filename,
-                    finder=finder, options=options, session=session,
-                    wheel_cache=wheel_cache,
-                    use_pep517=options.use_pep517):
-                req_to_add.is_direct = True
-                requirement_set.add_requirement(req_to_add)
-        # If --require-hashes was a line in a requirements file, tell
-        # RequirementSet about it:
-        requirement_set.require_hashes = options.require_hashes
-
-        if not (args or options.editables or options.requirements):
-            opts = {'name': name}
-            if options.find_links:
-                raise CommandError(
-                    'You must give at least one requirement to %(name)s '
-                    '(maybe you meant "pip %(name)s %(links)s"?)' %
-                    dict(opts, links=' '.join(options.find_links)))
-            else:
-                raise CommandError(
-                    'You must give at least one requirement to %(name)s '
-                    '(see "pip help %(name)s")' % opts)
-
-    def _build_package_finder(
-        self,
-        options,               # type: Values
-        session,               # type: PipSession
-        platform=None,         # type: Optional[str]
-        python_versions=None,  # type: Optional[List[str]]
-        abi=None,              # type: Optional[str]
-        implementation=None    # type: Optional[str]
-    ):
-        # type: (...) -> PackageFinder
-        """
-        Create a package finder appropriate to this requirement command.
-        """
-        index_urls = [options.index_url] + options.extra_index_urls
-        if options.no_index:
-            logger.debug(
-                'Ignoring indexes: %s',
-                ','.join(redact_password_from_url(url) for url in index_urls),
-            )
-            index_urls = []
-
-        return PackageFinder(
-            find_links=options.find_links,
-            format_control=options.format_control,
-            index_urls=index_urls,
-            trusted_hosts=options.trusted_hosts,
-            allow_all_prereleases=options.pre,
-            session=session,
-            platform=platform,
-            versions=python_versions,
-            abi=abi,
-            implementation=implementation,
-            prefer_binary=options.prefer_binary,
-        )
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/cli/cmdoptions.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/cli/cmdoptions.py
deleted file mode 100644
index 5cf5ee9..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/cli/cmdoptions.py
+++ /dev/null
@@ -1,809 +0,0 @@
-"""
-shared options and groups
-
-The principle here is to define options once, but *not* instantiate them
-globally. One reason being that options with action='append' can carry state
-between parses. pip parses general options twice internally, and shouldn't
-pass on state. To be consistent, all options will follow this design.
-
-"""
-from __future__ import absolute_import
-
-import textwrap
-import warnings
-from distutils.util import strtobool
-from functools import partial
-from optparse import SUPPRESS_HELP, Option, OptionGroup
-
-from pip._internal.exceptions import CommandError
-from pip._internal.locations import USER_CACHE_DIR, src_prefix
-from pip._internal.models.format_control import FormatControl
-from pip._internal.models.index import PyPI
-from pip._internal.utils.hashes import STRONG_HASHES
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-from pip._internal.utils.ui import BAR_TYPES
-
-if MYPY_CHECK_RUNNING:
-    from typing import Any, Callable, Dict, List, Optional, Union  # noqa: F401
-    from optparse import OptionParser, Values  # noqa: F401
-    from pip._internal.cli.parser import ConfigOptionParser  # noqa: F401
-
-
-def raise_option_error(parser, option, msg):
-    """
-    Raise an option parsing error using parser.error().
-
-    Args:
-      parser: an OptionParser instance.
-      option: an Option instance.
-      msg: the error text.
-    """
-    msg = '{} error: {}'.format(option, msg)
-    msg = textwrap.fill(' '.join(msg.split()))
-    parser.error(msg)
-
-
-def make_option_group(group, parser):
-    # type: (Dict[str, Any], ConfigOptionParser) -> OptionGroup
-    """
-    Return an OptionGroup object
-    group  -- assumed to be dict with 'name' and 'options' keys
-    parser -- an optparse Parser
-    """
-    option_group = OptionGroup(parser, group['name'])
-    for option in group['options']:
-        option_group.add_option(option())
-    return option_group
-
-
-def check_install_build_global(options, check_options=None):
-    # type: (Values, Optional[Values]) -> None
-    """Disable wheels if per-setup.py call options are set.
-
-    :param options: The OptionParser options to update.
-    :param check_options: The options to check, if not supplied defaults to
-        options.
-    """
-    if check_options is None:
-        check_options = options
-
-    def getname(n):
-        return getattr(check_options, n, None)
-    names = ["build_options", "global_options", "install_options"]
-    if any(map(getname, names)):
-        control = options.format_control
-        control.disallow_binaries()
-        warnings.warn(
-            'Disabling all use of wheels due to the use of --build-options '
-            '/ --global-options / --install-options.', stacklevel=2,
-        )
-
-
-def check_dist_restriction(options, check_target=False):
-    # type: (Values, bool) -> None
-    """Function for determining if custom platform options are allowed.
-
-    :param options: The OptionParser options.
-    :param check_target: Whether or not to check if --target is being used.
-    """
-    dist_restriction_set = any([
-        options.python_version,
-        options.platform,
-        options.abi,
-        options.implementation,
-    ])
-
-    binary_only = FormatControl(set(), {':all:'})
-    sdist_dependencies_allowed = (
-        options.format_control != binary_only and
-        not options.ignore_dependencies
-    )
-
-    # Installations or downloads using dist restrictions must not combine
-    # source distributions and dist-specific wheels, as they are not
-    # gauranteed to be locally compatible.
-    if dist_restriction_set and sdist_dependencies_allowed:
-        raise CommandError(
-            "When restricting platform and interpreter constraints using "
-            "--python-version, --platform, --abi, or --implementation, "
-            "either --no-deps must be set, or --only-binary=:all: must be "
-            "set and --no-binary must not be set (or must be set to "
-            ":none:)."
-        )
-
-    if check_target:
-        if dist_restriction_set and not options.target_dir:
-            raise CommandError(
-                "Can not use any platform or abi specific options unless "
-                "installing via '--target'"
-            )
-
-
-###########
-# options #
-###########
-
-help_ = partial(
-    Option,
-    '-h', '--help',
-    dest='help',
-    action='help',
-    help='Show help.',
-)  # type: Callable[..., Option]
-
-isolated_mode = partial(
-    Option,
-    "--isolated",
-    dest="isolated_mode",
-    action="store_true",
-    default=False,
-    help=(
-        "Run pip in an isolated mode, ignoring environment variables and user "
-        "configuration."
-    ),
-)  # type: Callable[..., Option]
-
-require_virtualenv = partial(
-    Option,
-    # Run only if inside a virtualenv, bail if not.
-    '--require-virtualenv', '--require-venv',
-    dest='require_venv',
-    action='store_true',
-    default=False,
-    help=SUPPRESS_HELP
-)  # type: Callable[..., Option]
-
-verbose = partial(
-    Option,
-    '-v', '--verbose',
-    dest='verbose',
-    action='count',
-    default=0,
-    help='Give more output. Option is additive, and can be used up to 3 times.'
-)  # type: Callable[..., Option]
-
-no_color = partial(
-    Option,
-    '--no-color',
-    dest='no_color',
-    action='store_true',
-    default=False,
-    help="Suppress colored output",
-)  # type: Callable[..., Option]
-
-version = partial(
-    Option,
-    '-V', '--version',
-    dest='version',
-    action='store_true',
-    help='Show version and exit.',
-)  # type: Callable[..., Option]
-
-quiet = partial(
-    Option,
-    '-q', '--quiet',
-    dest='quiet',
-    action='count',
-    default=0,
-    help=(
-        'Give less output. Option is additive, and can be used up to 3'
-        ' times (corresponding to WARNING, ERROR, and CRITICAL logging'
-        ' levels).'
-    ),
-)  # type: Callable[..., Option]
-
-progress_bar = partial(
-    Option,
-    '--progress-bar',
-    dest='progress_bar',
-    type='choice',
-    choices=list(BAR_TYPES.keys()),
-    default='on',
-    help=(
-        'Specify type of progress to be displayed [' +
-        '|'.join(BAR_TYPES.keys()) + '] (default: %default)'
-    ),
-)  # type: Callable[..., Option]
-
-log = partial(
-    Option,
-    "--log", "--log-file", "--local-log",
-    dest="log",
-    metavar="path",
-    help="Path to a verbose appending log."
-)  # type: Callable[..., Option]
-
-no_input = partial(
-    Option,
-    # Don't ask for input
-    '--no-input',
-    dest='no_input',
-    action='store_true',
-    default=False,
-    help=SUPPRESS_HELP
-)  # type: Callable[..., Option]
-
-proxy = partial(
-    Option,
-    '--proxy',
-    dest='proxy',
-    type='str',
-    default='',
-    help="Specify a proxy in the form [user:passwd@]proxy.server:port."
-)  # type: Callable[..., Option]
-
-retries = partial(
-    Option,
-    '--retries',
-    dest='retries',
-    type='int',
-    default=5,
-    help="Maximum number of retries each connection should attempt "
-         "(default %default times).",
-)  # type: Callable[..., Option]
-
-timeout = partial(
-    Option,
-    '--timeout', '--default-timeout',
-    metavar='sec',
-    dest='timeout',
-    type='float',
-    default=15,
-    help='Set the socket timeout (default %default seconds).',
-)  # type: Callable[..., Option]
-
-skip_requirements_regex = partial(
-    Option,
-    # A regex to be used to skip requirements
-    '--skip-requirements-regex',
-    dest='skip_requirements_regex',
-    type='str',
-    default='',
-    help=SUPPRESS_HELP,
-)  # type: Callable[..., Option]
-
-
-def exists_action():
-    # type: () -> Option
-    return Option(
-        # Option when path already exist
-        '--exists-action',
-        dest='exists_action',
-        type='choice',
-        choices=['s', 'i', 'w', 'b', 'a'],
-        default=[],
-        action='append',
-        metavar='action',
-        help="Default action when a path already exists: "
-             "(s)witch, (i)gnore, (w)ipe, (b)ackup, (a)bort).",
-    )
-
-
-cert = partial(
-    Option,
-    '--cert',
-    dest='cert',
-    type='str',
-    metavar='path',
-    help="Path to alternate CA bundle.",
-)  # type: Callable[..., Option]
-
-client_cert = partial(
-    Option,
-    '--client-cert',
-    dest='client_cert',
-    type='str',
-    default=None,
-    metavar='path',
-    help="Path to SSL client certificate, a single file containing the "
-         "private key and the certificate in PEM format.",
-)  # type: Callable[..., Option]
-
-index_url = partial(
-    Option,
-    '-i', '--index-url', '--pypi-url',
-    dest='index_url',
-    metavar='URL',
-    default=PyPI.simple_url,
-    help="Base URL of Python Package Index (default %default). "
-         "This should point to a repository compliant with PEP 503 "
-         "(the simple repository API) or a local directory laid out "
-         "in the same format.",
-)  # type: Callable[..., Option]
-
-
-def extra_index_url():
-    return Option(
-        '--extra-index-url',
-        dest='extra_index_urls',
-        metavar='URL',
-        action='append',
-        default=[],
-        help="Extra URLs of package indexes to use in addition to "
-             "--index-url. Should follow the same rules as "
-             "--index-url.",
-    )
-
-
-no_index = partial(
-    Option,
-    '--no-index',
-    dest='no_index',
-    action='store_true',
-    default=False,
-    help='Ignore package index (only looking at --find-links URLs instead).',
-)  # type: Callable[..., Option]
-
-
-def find_links():
-    # type: () -> Option
-    return Option(
-        '-f', '--find-links',
-        dest='find_links',
-        action='append',
-        default=[],
-        metavar='url',
-        help="If a url or path to an html file, then parse for links to "
-             "archives. If a local path or file:// url that's a directory, "
-             "then look for archives in the directory listing.",
-    )
-
-
-def trusted_host():
-    # type: () -> Option
-    return Option(
-        "--trusted-host",
-        dest="trusted_hosts",
-        action="append",
-        metavar="HOSTNAME",
-        default=[],
-        help="Mark this host as trusted, even though it does not have valid "
-             "or any HTTPS.",
-    )
-
-
-def constraints():
-    # type: () -> Option
-    return Option(
-        '-c', '--constraint',
-        dest='constraints',
-        action='append',
-        default=[],
-        metavar='file',
-        help='Constrain versions using the given constraints file. '
-        'This option can be used multiple times.'
-    )
-
-
-def requirements():
-    # type: () -> Option
-    return Option(
-        '-r', '--requirement',
-        dest='requirements',
-        action='append',
-        default=[],
-        metavar='file',
-        help='Install from the given requirements file. '
-        'This option can be used multiple times.'
-    )
-
-
-def editable():
-    # type: () -> Option
-    return Option(
-        '-e', '--editable',
-        dest='editables',
-        action='append',
-        default=[],
-        metavar='path/url',
-        help=('Install a project in editable mode (i.e. setuptools '
-              '"develop mode") from a local project path or a VCS url.'),
-    )
-
-
-src = partial(
-    Option,
-    '--src', '--source', '--source-dir', '--source-directory',
-    dest='src_dir',
-    metavar='dir',
-    default=src_prefix,
-    help='Directory to check out editable projects into. '
-    'The default in a virtualenv is "<venv path>/src". '
-    'The default for global installs is "<current dir>/src".'
-)  # type: Callable[..., Option]
-
-
-def _get_format_control(values, option):
-    # type: (Values, Option) -> Any
-    """Get a format_control object."""
-    return getattr(values, option.dest)
-
-
-def _handle_no_binary(option, opt_str, value, parser):
-    # type: (Option, str, str, OptionParser) -> None
-    existing = _get_format_control(parser.values, option)
-    FormatControl.handle_mutual_excludes(
-        value, existing.no_binary, existing.only_binary,
-    )
-
-
-def _handle_only_binary(option, opt_str, value, parser):
-    # type: (Option, str, str, OptionParser) -> None
-    existing = _get_format_control(parser.values, option)
-    FormatControl.handle_mutual_excludes(
-        value, existing.only_binary, existing.no_binary,
-    )
-
-
-def no_binary():
-    # type: () -> Option
-    format_control = FormatControl(set(), set())
-    return Option(
-        "--no-binary", dest="format_control", action="callback",
-        callback=_handle_no_binary, type="str",
-        default=format_control,
-        help="Do not use binary packages. Can be supplied multiple times, and "
-             "each time adds to the existing value. Accepts either :all: to "
-             "disable all binary packages, :none: to empty the set, or one or "
-             "more package names with commas between them. Note that some "
-             "packages are tricky to compile and may fail to install when "
-             "this option is used on them.",
-    )
-
-
-def only_binary():
-    # type: () -> Option
-    format_control = FormatControl(set(), set())
-    return Option(
-        "--only-binary", dest="format_control", action="callback",
-        callback=_handle_only_binary, type="str",
-        default=format_control,
-        help="Do not use source packages. Can be supplied multiple times, and "
-             "each time adds to the existing value. Accepts either :all: to "
-             "disable all source packages, :none: to empty the set, or one or "
-             "more package names with commas between them. Packages without "
-             "binary distributions will fail to install when this option is "
-             "used on them.",
-    )
-
-
-platform = partial(
-    Option,
-    '--platform',
-    dest='platform',
-    metavar='platform',
-    default=None,
-    help=("Only use wheels compatible with <platform>. "
-          "Defaults to the platform of the running system."),
-)  # type: Callable[..., Option]
-
-
-python_version = partial(
-    Option,
-    '--python-version',
-    dest='python_version',
-    metavar='python_version',
-    default=None,
-    help=("Only use wheels compatible with Python "
-          "interpreter version <version>. If not specified, then the "
-          "current system interpreter minor version is used. A major "
-          "version (e.g. '2') can be specified to match all "
-          "minor revs of that major version.  A minor version "
-          "(e.g. '34') can also be specified."),
-)  # type: Callable[..., Option]
-
-
-implementation = partial(
-    Option,
-    '--implementation',
-    dest='implementation',
-    metavar='implementation',
-    default=None,
-    help=("Only use wheels compatible with Python "
-          "implementation <implementation>, e.g. 'pp', 'jy', 'cp', "
-          " or 'ip'. If not specified, then the current "
-          "interpreter implementation is used.  Use 'py' to force "
-          "implementation-agnostic wheels."),
-)  # type: Callable[..., Option]
-
-
-abi = partial(
-    Option,
-    '--abi',
-    dest='abi',
-    metavar='abi',
-    default=None,
-    help=("Only use wheels compatible with Python "
-          "abi <abi>, e.g. 'pypy_41'.  If not specified, then the "
-          "current interpreter abi tag is used.  Generally "
-          "you will need to specify --implementation, "
-          "--platform, and --python-version when using "
-          "this option."),
-)  # type: Callable[..., Option]
-
-
-def prefer_binary():
-    # type: () -> Option
-    return Option(
-        "--prefer-binary",
-        dest="prefer_binary",
-        action="store_true",
-        default=False,
-        help="Prefer older binary packages over newer source packages."
-    )
-
-
-cache_dir = partial(
-    Option,
-    "--cache-dir",
-    dest="cache_dir",
-    default=USER_CACHE_DIR,
-    metavar="dir",
-    help="Store the cache data in <dir>."
-)  # type: Callable[..., Option]
-
-
-def no_cache_dir_callback(option, opt, value, parser):
-    """
-    Process a value provided for the --no-cache-dir option.
-
-    This is an optparse.Option callback for the --no-cache-dir option.
-    """
-    # The value argument will be None if --no-cache-dir is passed via the
-    # command-line, since the option doesn't accept arguments.  However,
-    # the value can be non-None if the option is triggered e.g. by an
-    # environment variable, like PIP_NO_CACHE_DIR=true.
-    if value is not None:
-        # Then parse the string value to get argument error-checking.
-        try:
-            strtobool(value)
-        except ValueError as exc:
-            raise_option_error(parser, option=option, msg=str(exc))
-
-    # Originally, setting PIP_NO_CACHE_DIR to a value that strtobool()
-    # converted to 0 (like "false" or "no") caused cache_dir to be disabled
-    # rather than enabled (logic would say the latter).  Thus, we disable
-    # the cache directory not just on values that parse to True, but (for
-    # backwards compatibility reasons) also on values that parse to False.
-    # In other words, always set it to False if the option is provided in
-    # some (valid) form.
-    parser.values.cache_dir = False
-
-
-no_cache = partial(
-    Option,
-    "--no-cache-dir",
-    dest="cache_dir",
-    action="callback",
-    callback=no_cache_dir_callback,
-    help="Disable the cache.",
-)  # type: Callable[..., Option]
-
-no_deps = partial(
-    Option,
-    '--no-deps', '--no-dependencies',
-    dest='ignore_dependencies',
-    action='store_true',
-    default=False,
-    help="Don't install package dependencies.",
-)  # type: Callable[..., Option]
-
-build_dir = partial(
-    Option,
-    '-b', '--build', '--build-dir', '--build-directory',
-    dest='build_dir',
-    metavar='dir',
-    help='Directory to unpack packages into and build in. Note that '
-         'an initial build still takes place in a temporary directory. '
-         'The location of temporary directories can be controlled by setting '
-         'the TMPDIR environment variable (TEMP on Windows) appropriately. '
-         'When passed, build directories are not cleaned in case of failures.'
-)  # type: Callable[..., Option]
-
-ignore_requires_python = partial(
-    Option,
-    '--ignore-requires-python',
-    dest='ignore_requires_python',
-    action='store_true',
-    help='Ignore the Requires-Python information.'
-)  # type: Callable[..., Option]
-
-no_build_isolation = partial(
-    Option,
-    '--no-build-isolation',
-    dest='build_isolation',
-    action='store_false',
-    default=True,
-    help='Disable isolation when building a modern source distribution. '
-         'Build dependencies specified by PEP 518 must be already installed '
-         'if this option is used.'
-)  # type: Callable[..., Option]
-
-
-def no_use_pep517_callback(option, opt, value, parser):
-    """
-    Process a value provided for the --no-use-pep517 option.
-
-    This is an optparse.Option callback for the no_use_pep517 option.
-    """
-    # Since --no-use-pep517 doesn't accept arguments, the value argument
-    # will be None if --no-use-pep517 is passed via the command-line.
-    # However, the value can be non-None if the option is triggered e.g.
-    # by an environment variable, for example "PIP_NO_USE_PEP517=true".
-    if value is not None:
-        msg = """A value was passed for --no-use-pep517,
-        probably using either the PIP_NO_USE_PEP517 environment variable
-        or the "no-use-pep517" config file option. Use an appropriate value
-        of the PIP_USE_PEP517 environment variable or the "use-pep517"
-        config file option instead.
-        """
-        raise_option_error(parser, option=option, msg=msg)
-
-    # Otherwise, --no-use-pep517 was passed via the command-line.
-    parser.values.use_pep517 = False
-
-
-use_pep517 = partial(
-    Option,
-    '--use-pep517',
-    dest='use_pep517',
-    action='store_true',
-    default=None,
-    help='Use PEP 517 for building source distributions '
-         '(use --no-use-pep517 to force legacy behaviour).'
-)  # type: Any
-
-no_use_pep517 = partial(
-    Option,
-    '--no-use-pep517',
-    dest='use_pep517',
-    action='callback',
-    callback=no_use_pep517_callback,
-    default=None,
-    help=SUPPRESS_HELP
-)  # type: Any
-
-install_options = partial(
-    Option,
-    '--install-option',
-    dest='install_options',
-    action='append',
-    metavar='options',
-    help="Extra arguments to be supplied to the setup.py install "
-         "command (use like --install-option=\"--install-scripts=/usr/local/"
-         "bin\"). Use multiple --install-option options to pass multiple "
-         "options to setup.py install. If you are using an option with a "
-         "directory path, be sure to use absolute path.",
-)  # type: Callable[..., Option]
-
-global_options = partial(
-    Option,
-    '--global-option',
-    dest='global_options',
-    action='append',
-    metavar='options',
-    help="Extra global options to be supplied to the setup.py "
-         "call before the install command.",
-)  # type: Callable[..., Option]
-
-no_clean = partial(
-    Option,
-    '--no-clean',
-    action='store_true',
-    default=False,
-    help="Don't clean up build directories."
-)  # type: Callable[..., Option]
-
-pre = partial(
-    Option,
-    '--pre',
-    action='store_true',
-    default=False,
-    help="Include pre-release and development versions. By default, "
-         "pip only finds stable versions.",
-)  # type: Callable[..., Option]
-
-disable_pip_version_check = partial(
-    Option,
-    "--disable-pip-version-check",
-    dest="disable_pip_version_check",
-    action="store_true",
-    default=False,
-    help="Don't periodically check PyPI to determine whether a new version "
-         "of pip is available for download. Implied with --no-index.",
-)  # type: Callable[..., Option]
-
-
-# Deprecated, Remove later
-always_unzip = partial(
-    Option,
-    '-Z', '--always-unzip',
-    dest='always_unzip',
-    action='store_true',
-    help=SUPPRESS_HELP,
-)  # type: Callable[..., Option]
-
-
-def _merge_hash(option, opt_str, value, parser):
-    # type: (Option, str, str, OptionParser) -> None
-    """Given a value spelled "algo:digest", append the digest to a list
-    pointed to in a dict by the algo name."""
-    if not parser.values.hashes:
-        parser.values.hashes = {}  # type: ignore
-    try:
-        algo, digest = value.split(':', 1)
-    except ValueError:
-        parser.error('Arguments to %s must be a hash name '
-                     'followed by a value, like --hash=sha256:abcde...' %
-                     opt_str)
-    if algo not in STRONG_HASHES:
-        parser.error('Allowed hash algorithms for %s are %s.' %
-                     (opt_str, ', '.join(STRONG_HASHES)))
-    parser.values.hashes.setdefault(algo, []).append(digest)
-
-
-hash = partial(
-    Option,
-    '--hash',
-    # Hash values eventually end up in InstallRequirement.hashes due to
-    # __dict__ copying in process_line().
-    dest='hashes',
-    action='callback',
-    callback=_merge_hash,
-    type='string',
-    help="Verify that the package's archive matches this "
-         'hash before installing. Example: --hash=sha256:abcdef...',
-)  # type: Callable[..., Option]
-
-
-require_hashes = partial(
-    Option,
-    '--require-hashes',
-    dest='require_hashes',
-    action='store_true',
-    default=False,
-    help='Require a hash to check each requirement against, for '
-         'repeatable installs. This option is implied when any package in a '
-         'requirements file has a --hash option.',
-)  # type: Callable[..., Option]
-
-
-##########
-# groups #
-##########
-
-general_group = {
-    'name': 'General Options',
-    'options': [
-        help_,
-        isolated_mode,
-        require_virtualenv,
-        verbose,
-        version,
-        quiet,
-        log,
-        no_input,
-        proxy,
-        retries,
-        timeout,
-        skip_requirements_regex,
-        exists_action,
-        trusted_host,
-        cert,
-        client_cert,
-        cache_dir,
-        no_cache,
-        disable_pip_version_check,
-        no_color,
-    ]
-}  # type: Dict[str, Any]
-
-index_group = {
-    'name': 'Package Index Options',
-    'options': [
-        index_url,
-        extra_index_url,
-        no_index,
-        find_links,
-    ]
-}  # type: Dict[str, Any]
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/cli/main_parser.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/cli/main_parser.py
deleted file mode 100644
index b17c749..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/cli/main_parser.py
+++ /dev/null
@@ -1,104 +0,0 @@
-"""A single place for constructing and exposing the main parser
-"""
-
-import os
-import sys
-
-from pip import __version__
-from pip._internal.cli import cmdoptions
-from pip._internal.cli.parser import (
-    ConfigOptionParser, UpdatingDefaultsHelpFormatter,
-)
-from pip._internal.commands import (
-    commands_dict, get_similar_commands, get_summaries,
-)
-from pip._internal.exceptions import CommandError
-from pip._internal.utils.misc import get_prog
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if MYPY_CHECK_RUNNING:
-    from typing import Tuple, List  # noqa: F401
-
-
-__all__ = ["create_main_parser", "parse_command"]
-
-
-def create_main_parser():
-    # type: () -> ConfigOptionParser
-    """Creates and returns the main parser for pip's CLI
-    """
-
-    parser_kw = {
-        'usage': '\n%prog <command> [options]',
-        'add_help_option': False,
-        'formatter': UpdatingDefaultsHelpFormatter(),
-        'name': 'global',
-        'prog': get_prog(),
-    }
-
-    parser = ConfigOptionParser(**parser_kw)
-    parser.disable_interspersed_args()
-
-    pip_pkg_dir = os.path.abspath(os.path.join(
-        os.path.dirname(__file__), "..", "..",
-    ))
-    parser.version = 'pip %s from %s (python %s)' % (
-        __version__, pip_pkg_dir, sys.version[:3],
-    )
-
-    # add the general options
-    gen_opts = cmdoptions.make_option_group(cmdoptions.general_group, parser)
-    parser.add_option_group(gen_opts)
-
-    # so the help formatter knows
-    parser.main = True  # type: ignore
-
-    # create command listing for description
-    command_summaries = get_summaries()
-    description = [''] + ['%-27s %s' % (i, j) for i, j in command_summaries]
-    parser.description = '\n'.join(description)
-
-    return parser
-
-
-def parse_command(args):
-    # type: (List[str]) -> Tuple[str, List[str]]
-    parser = create_main_parser()
-
-    # Note: parser calls disable_interspersed_args(), so the result of this
-    # call is to split the initial args into the general options before the
-    # subcommand and everything else.
-    # For example:
-    #  args: ['--timeout=5', 'install', '--user', 'INITools']
-    #  general_options: ['--timeout==5']
-    #  args_else: ['install', '--user', 'INITools']
-    general_options, args_else = parser.parse_args(args)
-
-    # --version
-    if general_options.version:
-        sys.stdout.write(parser.version)  # type: ignore
-        sys.stdout.write(os.linesep)
-        sys.exit()
-
-    # pip || pip help -> print_help()
-    if not args_else or (args_else[0] == 'help' and len(args_else) == 1):
-        parser.print_help()
-        sys.exit()
-
-    # the subcommand name
-    cmd_name = args_else[0]
-
-    if cmd_name not in commands_dict:
-        guess = get_similar_commands(cmd_name)
-
-        msg = ['unknown command "%s"' % cmd_name]
-        if guess:
-            msg.append('maybe you meant "%s"' % guess)
-
-        raise CommandError(' - '.join(msg))
-
-    # all the args without the subcommand
-    cmd_args = args[:]
-    cmd_args.remove(cmd_name)
-
-    return cmd_name, cmd_args
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/cli/parser.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/cli/parser.py
deleted file mode 100644
index e1eaac4..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/cli/parser.py
+++ /dev/null
@@ -1,261 +0,0 @@
-"""Base option parser setup"""
-from __future__ import absolute_import
-
-import logging
-import optparse
-import sys
-import textwrap
-from distutils.util import strtobool
-
-from pip._vendor.six import string_types
-
-from pip._internal.cli.status_codes import UNKNOWN_ERROR
-from pip._internal.configuration import Configuration, ConfigurationError
-from pip._internal.utils.compat import get_terminal_size
-
-logger = logging.getLogger(__name__)
-
-
-class PrettyHelpFormatter(optparse.IndentedHelpFormatter):
-    """A prettier/less verbose help formatter for optparse."""
-
-    def __init__(self, *args, **kwargs):
-        # help position must be aligned with __init__.parseopts.description
-        kwargs['max_help_position'] = 30
-        kwargs['indent_increment'] = 1
-        kwargs['width'] = get_terminal_size()[0] - 2
-        optparse.IndentedHelpFormatter.__init__(self, *args, **kwargs)
-
-    def format_option_strings(self, option):
-        return self._format_option_strings(option, ' <%s>', ', ')
-
-    def _format_option_strings(self, option, mvarfmt=' <%s>', optsep=', '):
-        """
-        Return a comma-separated list of option strings and metavars.
-
-        :param option:  tuple of (short opt, long opt), e.g: ('-f', '--format')
-        :param mvarfmt: metavar format string - evaluated as mvarfmt % metavar
-        :param optsep:  separator
-        """
-        opts = []
-
-        if option._short_opts:
-            opts.append(option._short_opts[0])
-        if option._long_opts:
-            opts.append(option._long_opts[0])
-        if len(opts) > 1:
-            opts.insert(1, optsep)
-
-        if option.takes_value():
-            metavar = option.metavar or option.dest.lower()
-            opts.append(mvarfmt % metavar.lower())
-
-        return ''.join(opts)
-
-    def format_heading(self, heading):
-        if heading == 'Options':
-            return ''
-        return heading + ':\n'
-
-    def format_usage(self, usage):
-        """
-        Ensure there is only one newline between usage and the first heading
-        if there is no description.
-        """
-        msg = '\nUsage: %s\n' % self.indent_lines(textwrap.dedent(usage), "  ")
-        return msg
-
-    def format_description(self, description):
-        # leave full control over description to us
-        if description:
-            if hasattr(self.parser, 'main'):
-                label = 'Commands'
-            else:
-                label = 'Description'
-            # some doc strings have initial newlines, some don't
-            description = description.lstrip('\n')
-            # some doc strings have final newlines and spaces, some don't
-            description = description.rstrip()
-            # dedent, then reindent
-            description = self.indent_lines(textwrap.dedent(description), "  ")
-            description = '%s:\n%s\n' % (label, description)
-            return description
-        else:
-            return ''
-
-    def format_epilog(self, epilog):
-        # leave full control over epilog to us
-        if epilog:
-            return epilog
-        else:
-            return ''
-
-    def indent_lines(self, text, indent):
-        new_lines = [indent + line for line in text.split('\n')]
-        return "\n".join(new_lines)
-
-
-class UpdatingDefaultsHelpFormatter(PrettyHelpFormatter):
-    """Custom help formatter for use in ConfigOptionParser.
-
-    This is updates the defaults before expanding them, allowing
-    them to show up correctly in the help listing.
-    """
-
-    def expand_default(self, option):
-        if self.parser is not None:
-            self.parser._update_defaults(self.parser.defaults)
-        return optparse.IndentedHelpFormatter.expand_default(self, option)
-
-
-class CustomOptionParser(optparse.OptionParser):
-
-    def insert_option_group(self, idx, *args, **kwargs):
-        """Insert an OptionGroup at a given position."""
-        group = self.add_option_group(*args, **kwargs)
-
-        self.option_groups.pop()
-        self.option_groups.insert(idx, group)
-
-        return group
-
-    @property
-    def option_list_all(self):
-        """Get a list of all options, including those in option groups."""
-        res = self.option_list[:]
-        for i in self.option_groups:
-            res.extend(i.option_list)
-
-        return res
-
-
-class ConfigOptionParser(CustomOptionParser):
-    """Custom option parser which updates its defaults by checking the
-    configuration files and environmental variables"""
-
-    def __init__(self, *args, **kwargs):
-        self.name = kwargs.pop('name')
-
-        isolated = kwargs.pop("isolated", False)
-        self.config = Configuration(isolated)
-
-        assert self.name
-        optparse.OptionParser.__init__(self, *args, **kwargs)
-
-    def check_default(self, option, key, val):
-        try:
-            return option.check_value(key, val)
-        except optparse.OptionValueError as exc:
-            print("An error occurred during configuration: %s" % exc)
-            sys.exit(3)
-
-    def _get_ordered_configuration_items(self):
-        # Configuration gives keys in an unordered manner. Order them.
-        override_order = ["global", self.name, ":env:"]
-
-        # Pool the options into different groups
-        section_items = {name: [] for name in override_order}
-        for section_key, val in self.config.items():
-            # ignore empty values
-            if not val:
-                logger.debug(
-                    "Ignoring configuration key '%s' as it's value is empty.",
-                    section_key
-                )
-                continue
-
-            section, key = section_key.split(".", 1)
-            if section in override_order:
-                section_items[section].append((key, val))
-
-        # Yield each group in their override order
-        for section in override_order:
-            for key, val in section_items[section]:
-                yield key, val
-
-    def _update_defaults(self, defaults):
-        """Updates the given defaults with values from the config files and
-        the environ. Does a little special handling for certain types of
-        options (lists)."""
-
-        # Accumulate complex default state.
-        self.values = optparse.Values(self.defaults)
-        late_eval = set()
-        # Then set the options with those values
-        for key, val in self._get_ordered_configuration_items():
-            # '--' because configuration supports only long names
-            option = self.get_option('--' + key)
-
-            # Ignore options not present in this parser. E.g. non-globals put
-            # in [global] by users that want them to apply to all applicable
-            # commands.
-            if option is None:
-                continue
-
-            if option.action in ('store_true', 'store_false', 'count'):
-                try:
-                    val = strtobool(val)
-                except ValueError:
-                    error_msg = invalid_config_error_message(
-                        option.action, key, val
-                    )
-                    self.error(error_msg)
-
-            elif option.action == 'append':
-                val = val.split()
-                val = [self.check_default(option, key, v) for v in val]
-            elif option.action == 'callback':
-                late_eval.add(option.dest)
-                opt_str = option.get_opt_string()
-                val = option.convert_value(opt_str, val)
-                # From take_action
-                args = option.callback_args or ()
-                kwargs = option.callback_kwargs or {}
-                option.callback(option, opt_str, val, self, *args, **kwargs)
-            else:
-                val = self.check_default(option, key, val)
-
-            defaults[option.dest] = val
-
-        for key in late_eval:
-            defaults[key] = getattr(self.values, key)
-        self.values = None
-        return defaults
-
-    def get_default_values(self):
-        """Overriding to make updating the defaults after instantiation of
-        the option parser possible, _update_defaults() does the dirty work."""
-        if not self.process_default_values:
-            # Old, pre-Optik 1.5 behaviour.
-            return optparse.Values(self.defaults)
-
-        # Load the configuration, or error out in case of an error
-        try:
-            self.config.load()
-        except ConfigurationError as err:
-            self.exit(UNKNOWN_ERROR, str(err))
-
-        defaults = self._update_defaults(self.defaults.copy())  # ours
-        for option in self._get_all_options():
-            default = defaults.get(option.dest)
-            if isinstance(default, string_types):
-                opt_str = option.get_opt_string()
-                defaults[option.dest] = option.check_value(opt_str, default)
-        return optparse.Values(defaults)
-
-    def error(self, msg):
-        self.print_usage(sys.stderr)
-        self.exit(UNKNOWN_ERROR, "%s\n" % msg)
-
-
-def invalid_config_error_message(action, key, val):
-    """Returns a better error message when invalid configuration option
-    is provided."""
-    if action in ('store_true', 'store_false'):
-        return ("{0} is not a valid value for {1} option, "
-                "please specify a boolean value like yes/no, "
-                "true/false or 1/0 instead.").format(val, key)
-
-    return ("{0} is not a valid value for {1} option, "
-            "please specify a numerical value like 1/0 "
-            "instead.").format(val, key)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/cli/status_codes.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/cli/status_codes.py
deleted file mode 100644
index 275360a..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/cli/status_codes.py
+++ /dev/null
@@ -1,8 +0,0 @@
-from __future__ import absolute_import
-
-SUCCESS = 0
-ERROR = 1
-UNKNOWN_ERROR = 2
-VIRTUALENV_NOT_FOUND = 3
-PREVIOUS_BUILD_DIR_ERROR = 4
-NO_MATCHES_FOUND = 23
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/__init__.py
deleted file mode 100644
index c7d1da3..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/__init__.py
+++ /dev/null
@@ -1,79 +0,0 @@
-"""
-Package containing all pip commands
-"""
-from __future__ import absolute_import
-
-from pip._internal.commands.completion import CompletionCommand
-from pip._internal.commands.configuration import ConfigurationCommand
-from pip._internal.commands.download import DownloadCommand
-from pip._internal.commands.freeze import FreezeCommand
-from pip._internal.commands.hash import HashCommand
-from pip._internal.commands.help import HelpCommand
-from pip._internal.commands.list import ListCommand
-from pip._internal.commands.check import CheckCommand
-from pip._internal.commands.search import SearchCommand
-from pip._internal.commands.show import ShowCommand
-from pip._internal.commands.install import InstallCommand
-from pip._internal.commands.uninstall import UninstallCommand
-from pip._internal.commands.wheel import WheelCommand
-
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if MYPY_CHECK_RUNNING:
-    from typing import List, Type  # noqa: F401
-    from pip._internal.cli.base_command import Command  # noqa: F401
-
-commands_order = [
-    InstallCommand,
-    DownloadCommand,
-    UninstallCommand,
-    FreezeCommand,
-    ListCommand,
-    ShowCommand,
-    CheckCommand,
-    ConfigurationCommand,
-    SearchCommand,
-    WheelCommand,
-    HashCommand,
-    CompletionCommand,
-    HelpCommand,
-]  # type: List[Type[Command]]
-
-commands_dict = {c.name: c for c in commands_order}
-
-
-def get_summaries(ordered=True):
-    """Yields sorted (command name, command summary) tuples."""
-
-    if ordered:
-        cmditems = _sort_commands(commands_dict, commands_order)
-    else:
-        cmditems = commands_dict.items()
-
-    for name, command_class in cmditems:
-        yield (name, command_class.summary)
-
-
-def get_similar_commands(name):
-    """Command name auto-correct."""
-    from difflib import get_close_matches
-
-    name = name.lower()
-
-    close_commands = get_close_matches(name, commands_dict.keys())
-
-    if close_commands:
-        return close_commands[0]
-    else:
-        return False
-
-
-def _sort_commands(cmddict, order):
-    def keyfn(key):
-        try:
-            return order.index(key[1])
-        except ValueError:
-            # unordered items should come last
-            return 0xff
-
-    return sorted(cmddict.items(), key=keyfn)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/check.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/check.py
deleted file mode 100644
index 801cecc..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/check.py
+++ /dev/null
@@ -1,41 +0,0 @@
-import logging
-
-from pip._internal.cli.base_command import Command
-from pip._internal.operations.check import (
-    check_package_set, create_package_set_from_installed,
-)
-
-logger = logging.getLogger(__name__)
-
-
-class CheckCommand(Command):
-    """Verify installed packages have compatible dependencies."""
-    name = 'check'
-    usage = """
-      %prog [options]"""
-    summary = 'Verify installed packages have compatible dependencies.'
-
-    def run(self, options, args):
-        package_set, parsing_probs = create_package_set_from_installed()
-        missing, conflicting = check_package_set(package_set)
-
-        for project_name in missing:
-            version = package_set[project_name].version
-            for dependency in missing[project_name]:
-                logger.info(
-                    "%s %s requires %s, which is not installed.",
-                    project_name, version, dependency[0],
-                )
-
-        for project_name in conflicting:
-            version = package_set[project_name].version
-            for dep_name, dep_version, req in conflicting[project_name]:
-                logger.info(
-                    "%s %s has requirement %s, but you have %s %s.",
-                    project_name, version, req, dep_name, dep_version,
-                )
-
-        if missing or conflicting or parsing_probs:
-            return 1
-        else:
-            logger.info("No broken requirements found.")
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/completion.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/completion.py
deleted file mode 100644
index 2fcdd39..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/completion.py
+++ /dev/null
@@ -1,94 +0,0 @@
-from __future__ import absolute_import
-
-import sys
-import textwrap
-
-from pip._internal.cli.base_command import Command
-from pip._internal.utils.misc import get_prog
-
-BASE_COMPLETION = """
-# pip %(shell)s completion start%(script)s# pip %(shell)s completion end
-"""
-
-COMPLETION_SCRIPTS = {
-    'bash': """
-        _pip_completion()
-        {
-            COMPREPLY=( $( COMP_WORDS="${COMP_WORDS[*]}" \\
-                           COMP_CWORD=$COMP_CWORD \\
-                           PIP_AUTO_COMPLETE=1 $1 ) )
-        }
-        complete -o default -F _pip_completion %(prog)s
-    """,
-    'zsh': """
-        function _pip_completion {
-          local words cword
-          read -Ac words
-          read -cn cword
-          reply=( $( COMP_WORDS="$words[*]" \\
-                     COMP_CWORD=$(( cword-1 )) \\
-                     PIP_AUTO_COMPLETE=1 $words[1] ) )
-        }
-        compctl -K _pip_completion %(prog)s
-    """,
-    'fish': """
-        function __fish_complete_pip
-            set -lx COMP_WORDS (commandline -o) ""
-            set -lx COMP_CWORD ( \\
-                math (contains -i -- (commandline -t) $COMP_WORDS)-1 \\
-            )
-            set -lx PIP_AUTO_COMPLETE 1
-            string split \\  -- (eval $COMP_WORDS[1])
-        end
-        complete -fa "(__fish_complete_pip)" -c %(prog)s
-    """,
-}
-
-
-class CompletionCommand(Command):
-    """A helper command to be used for command completion."""
-    name = 'completion'
-    summary = 'A helper command used for command completion.'
-    ignore_require_venv = True
-
-    def __init__(self, *args, **kw):
-        super(CompletionCommand, self).__init__(*args, **kw)
-
-        cmd_opts = self.cmd_opts
-
-        cmd_opts.add_option(
-            '--bash', '-b',
-            action='store_const',
-            const='bash',
-            dest='shell',
-            help='Emit completion code for bash')
-        cmd_opts.add_option(
-            '--zsh', '-z',
-            action='store_const',
-            const='zsh',
-            dest='shell',
-            help='Emit completion code for zsh')
-        cmd_opts.add_option(
-            '--fish', '-f',
-            action='store_const',
-            const='fish',
-            dest='shell',
-            help='Emit completion code for fish')
-
-        self.parser.insert_option_group(0, cmd_opts)
-
-    def run(self, options, args):
-        """Prints the completion code of the given shell"""
-        shells = COMPLETION_SCRIPTS.keys()
-        shell_options = ['--' + shell for shell in sorted(shells)]
-        if options.shell in shells:
-            script = textwrap.dedent(
-                COMPLETION_SCRIPTS.get(options.shell, '') % {
-                    'prog': get_prog(),
-                }
-            )
-            print(BASE_COMPLETION % {'script': script, 'shell': options.shell})
-        else:
-            sys.stderr.write(
-                'ERROR: You must pass %s\n' % ' or '.join(shell_options)
-            )
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/configuration.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/configuration.py
deleted file mode 100644
index 826c08d..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/configuration.py
+++ /dev/null
@@ -1,227 +0,0 @@
-import logging
-import os
-import subprocess
-
-from pip._internal.cli.base_command import Command
-from pip._internal.cli.status_codes import ERROR, SUCCESS
-from pip._internal.configuration import Configuration, kinds
-from pip._internal.exceptions import PipError
-from pip._internal.locations import venv_config_file
-from pip._internal.utils.misc import get_prog
-
-logger = logging.getLogger(__name__)
-
-
-class ConfigurationCommand(Command):
-    """Manage local and global configuration.
-
-        Subcommands:
-
-        list: List the active configuration (or from the file specified)
-        edit: Edit the configuration file in an editor
-        get: Get the value associated with name
-        set: Set the name=value
-        unset: Unset the value associated with name
-
-        If none of --user, --global and --venv are passed, a virtual
-        environment configuration file is used if one is active and the file
-        exists. Otherwise, all modifications happen on the to the user file by
-        default.
-    """
-
-    name = 'config'
-    usage = """
-        %prog [<file-option>] list
-        %prog [<file-option>] [--editor <editor-path>] edit
-
-        %prog [<file-option>] get name
-        %prog [<file-option>] set name value
-        %prog [<file-option>] unset name
-    """
-
-    summary = "Manage local and global configuration."
-
-    def __init__(self, *args, **kwargs):
-        super(ConfigurationCommand, self).__init__(*args, **kwargs)
-
-        self.configuration = None
-
-        self.cmd_opts.add_option(
-            '--editor',
-            dest='editor',
-            action='store',
-            default=None,
-            help=(
-                'Editor to use to edit the file. Uses VISUAL or EDITOR '
-                'environment variables if not provided.'
-            )
-        )
-
-        self.cmd_opts.add_option(
-            '--global',
-            dest='global_file',
-            action='store_true',
-            default=False,
-            help='Use the system-wide configuration file only'
-        )
-
-        self.cmd_opts.add_option(
-            '--user',
-            dest='user_file',
-            action='store_true',
-            default=False,
-            help='Use the user configuration file only'
-        )
-
-        self.cmd_opts.add_option(
-            '--venv',
-            dest='venv_file',
-            action='store_true',
-            default=False,
-            help='Use the virtualenv configuration file only'
-        )
-
-        self.parser.insert_option_group(0, self.cmd_opts)
-
-    def run(self, options, args):
-        handlers = {
-            "list": self.list_values,
-            "edit": self.open_in_editor,
-            "get": self.get_name,
-            "set": self.set_name_value,
-            "unset": self.unset_name
-        }
-
-        # Determine action
-        if not args or args[0] not in handlers:
-            logger.error("Need an action ({}) to perform.".format(
-                ", ".join(sorted(handlers)))
-            )
-            return ERROR
-
-        action = args[0]
-
-        # Determine which configuration files are to be loaded
-        #    Depends on whether the command is modifying.
-        try:
-            load_only = self._determine_file(
-                options, need_value=(action in ["get", "set", "unset", "edit"])
-            )
-        except PipError as e:
-            logger.error(e.args[0])
-            return ERROR
-
-        # Load a new configuration
-        self.configuration = Configuration(
-            isolated=options.isolated_mode, load_only=load_only
-        )
-        self.configuration.load()
-
-        # Error handling happens here, not in the action-handlers.
-        try:
-            handlers[action](options, args[1:])
-        except PipError as e:
-            logger.error(e.args[0])
-            return ERROR
-
-        return SUCCESS
-
-    def _determine_file(self, options, need_value):
-        file_options = {
-            kinds.USER: options.user_file,
-            kinds.GLOBAL: options.global_file,
-            kinds.VENV: options.venv_file
-        }
-
-        if sum(file_options.values()) == 0:
-            if not need_value:
-                return None
-            # Default to user, unless there's a virtualenv file.
-            elif os.path.exists(venv_config_file):
-                return kinds.VENV
-            else:
-                return kinds.USER
-        elif sum(file_options.values()) == 1:
-            # There's probably a better expression for this.
-            return [key for key in file_options if file_options[key]][0]
-
-        raise PipError(
-            "Need exactly one file to operate upon "
-            "(--user, --venv, --global) to perform."
-        )
-
-    def list_values(self, options, args):
-        self._get_n_args(args, "list", n=0)
-
-        for key, value in sorted(self.configuration.items()):
-            logger.info("%s=%r", key, value)
-
-    def get_name(self, options, args):
-        key = self._get_n_args(args, "get [name]", n=1)
-        value = self.configuration.get_value(key)
-
-        logger.info("%s", value)
-
-    def set_name_value(self, options, args):
-        key, value = self._get_n_args(args, "set [name] [value]", n=2)
-        self.configuration.set_value(key, value)
-
-        self._save_configuration()
-
-    def unset_name(self, options, args):
-        key = self._get_n_args(args, "unset [name]", n=1)
-        self.configuration.unset_value(key)
-
-        self._save_configuration()
-
-    def open_in_editor(self, options, args):
-        editor = self._determine_editor(options)
-
-        fname = self.configuration.get_file_to_edit()
-        if fname is None:
-            raise PipError("Could not determine appropriate file.")
-
-        try:
-            subprocess.check_call([editor, fname])
-        except subprocess.CalledProcessError as e:
-            raise PipError(
-                "Editor Subprocess exited with exit code {}"
-                .format(e.returncode)
-            )
-
-    def _get_n_args(self, args, example, n):
-        """Helper to make sure the command got the right number of arguments
-        """
-        if len(args) != n:
-            msg = (
-                'Got unexpected number of arguments, expected {}. '
-                '(example: "{} config {}")'
-            ).format(n, get_prog(), example)
-            raise PipError(msg)
-
-        if n == 1:
-            return args[0]
-        else:
-            return args
-
-    def _save_configuration(self):
-        # We successfully ran a modifying command. Need to save the
-        # configuration.
-        try:
-            self.configuration.save()
-        except Exception:
-            logger.error(
-                "Unable to save configuration. Please report this as a bug.",
-                exc_info=1
-            )
-            raise PipError("Internal Error.")
-
-    def _determine_editor(self, options):
-        if options.editor is not None:
-            return options.editor
-        elif "VISUAL" in os.environ:
-            return os.environ["VISUAL"]
-        elif "EDITOR" in os.environ:
-            return os.environ["EDITOR"]
-        else:
-            raise PipError("Could not determine editor to use.")
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/download.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/download.py
deleted file mode 100644
index a57e4bc..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/download.py
+++ /dev/null
@@ -1,176 +0,0 @@
-from __future__ import absolute_import
-
-import logging
-import os
-
-from pip._internal.cli import cmdoptions
-from pip._internal.cli.base_command import RequirementCommand
-from pip._internal.operations.prepare import RequirementPreparer
-from pip._internal.req import RequirementSet
-from pip._internal.req.req_tracker import RequirementTracker
-from pip._internal.resolve import Resolver
-from pip._internal.utils.filesystem import check_path_owner
-from pip._internal.utils.misc import ensure_dir, normalize_path
-from pip._internal.utils.temp_dir import TempDirectory
-
-logger = logging.getLogger(__name__)
-
-
-class DownloadCommand(RequirementCommand):
-    """
-    Download packages from:
-
-    - PyPI (and other indexes) using requirement specifiers.
-    - VCS project urls.
-    - Local project directories.
-    - Local or remote source archives.
-
-    pip also supports downloading from "requirements files", which provide
-    an easy way to specify a whole environment to be downloaded.
-    """
-    name = 'download'
-
-    usage = """
-      %prog [options] <requirement specifier> [package-index-options] ...
-      %prog [options] -r <requirements file> [package-index-options] ...
-      %prog [options] <vcs project url> ...
-      %prog [options] <local project path> ...
-      %prog [options] <archive url/path> ..."""
-
-    summary = 'Download packages.'
-
-    def __init__(self, *args, **kw):
-        super(DownloadCommand, self).__init__(*args, **kw)
-
-        cmd_opts = self.cmd_opts
-
-        cmd_opts.add_option(cmdoptions.constraints())
-        cmd_opts.add_option(cmdoptions.requirements())
-        cmd_opts.add_option(cmdoptions.build_dir())
-        cmd_opts.add_option(cmdoptions.no_deps())
-        cmd_opts.add_option(cmdoptions.global_options())
-        cmd_opts.add_option(cmdoptions.no_binary())
-        cmd_opts.add_option(cmdoptions.only_binary())
-        cmd_opts.add_option(cmdoptions.prefer_binary())
-        cmd_opts.add_option(cmdoptions.src())
-        cmd_opts.add_option(cmdoptions.pre())
-        cmd_opts.add_option(cmdoptions.no_clean())
-        cmd_opts.add_option(cmdoptions.require_hashes())
-        cmd_opts.add_option(cmdoptions.progress_bar())
-        cmd_opts.add_option(cmdoptions.no_build_isolation())
-        cmd_opts.add_option(cmdoptions.use_pep517())
-        cmd_opts.add_option(cmdoptions.no_use_pep517())
-
-        cmd_opts.add_option(
-            '-d', '--dest', '--destination-dir', '--destination-directory',
-            dest='download_dir',
-            metavar='dir',
-            default=os.curdir,
-            help=("Download packages into <dir>."),
-        )
-
-        cmd_opts.add_option(cmdoptions.platform())
-        cmd_opts.add_option(cmdoptions.python_version())
-        cmd_opts.add_option(cmdoptions.implementation())
-        cmd_opts.add_option(cmdoptions.abi())
-
-        index_opts = cmdoptions.make_option_group(
-            cmdoptions.index_group,
-            self.parser,
-        )
-
-        self.parser.insert_option_group(0, index_opts)
-        self.parser.insert_option_group(0, cmd_opts)
-
-    def run(self, options, args):
-        options.ignore_installed = True
-        # editable doesn't really make sense for `pip download`, but the bowels
-        # of the RequirementSet code require that property.
-        options.editables = []
-
-        if options.python_version:
-            python_versions = [options.python_version]
-        else:
-            python_versions = None
-
-        cmdoptions.check_dist_restriction(options)
-
-        options.src_dir = os.path.abspath(options.src_dir)
-        options.download_dir = normalize_path(options.download_dir)
-
-        ensure_dir(options.download_dir)
-
-        with self._build_session(options) as session:
-            finder = self._build_package_finder(
-                options=options,
-                session=session,
-                platform=options.platform,
-                python_versions=python_versions,
-                abi=options.abi,
-                implementation=options.implementation,
-            )
-            build_delete = (not (options.no_clean or options.build_dir))
-            if options.cache_dir and not check_path_owner(options.cache_dir):
-                logger.warning(
-                    "The directory '%s' or its parent directory is not owned "
-                    "by the current user and caching wheels has been "
-                    "disabled. check the permissions and owner of that "
-                    "directory. If executing pip with sudo, you may want "
-                    "sudo's -H flag.",
-                    options.cache_dir,
-                )
-                options.cache_dir = None
-
-            with RequirementTracker() as req_tracker, TempDirectory(
-                options.build_dir, delete=build_delete, kind="download"
-            ) as directory:
-
-                requirement_set = RequirementSet(
-                    require_hashes=options.require_hashes,
-                )
-                self.populate_requirement_set(
-                    requirement_set,
-                    args,
-                    options,
-                    finder,
-                    session,
-                    self.name,
-                    None
-                )
-
-                preparer = RequirementPreparer(
-                    build_dir=directory.path,
-                    src_dir=options.src_dir,
-                    download_dir=options.download_dir,
-                    wheel_download_dir=None,
-                    progress_bar=options.progress_bar,
-                    build_isolation=options.build_isolation,
-                    req_tracker=req_tracker,
-                )
-
-                resolver = Resolver(
-                    preparer=preparer,
-                    finder=finder,
-                    session=session,
-                    wheel_cache=None,
-                    use_user_site=False,
-                    upgrade_strategy="to-satisfy-only",
-                    force_reinstall=False,
-                    ignore_dependencies=options.ignore_dependencies,
-                    ignore_requires_python=False,
-                    ignore_installed=True,
-                    isolated=options.isolated_mode,
-                )
-                resolver.resolve(requirement_set)
-
-                downloaded = ' '.join([
-                    req.name for req in requirement_set.successfully_downloaded
-                ])
-                if downloaded:
-                    logger.info('Successfully downloaded %s', downloaded)
-
-                # Clean up
-                if not options.no_clean:
-                    requirement_set.cleanup_files()
-
-        return requirement_set
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/freeze.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/freeze.py
deleted file mode 100644
index dc9c53a..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/freeze.py
+++ /dev/null
@@ -1,96 +0,0 @@
-from __future__ import absolute_import
-
-import sys
-
-from pip._internal.cache import WheelCache
-from pip._internal.cli.base_command import Command
-from pip._internal.models.format_control import FormatControl
-from pip._internal.operations.freeze import freeze
-from pip._internal.utils.compat import stdlib_pkgs
-
-DEV_PKGS = {'pip', 'setuptools', 'distribute', 'wheel'}
-
-
-class FreezeCommand(Command):
-    """
-    Output installed packages in requirements format.
-
-    packages are listed in a case-insensitive sorted order.
-    """
-    name = 'freeze'
-    usage = """
-      %prog [options]"""
-    summary = 'Output installed packages in requirements format.'
-    log_streams = ("ext://sys.stderr", "ext://sys.stderr")
-
-    def __init__(self, *args, **kw):
-        super(FreezeCommand, self).__init__(*args, **kw)
-
-        self.cmd_opts.add_option(
-            '-r', '--requirement',
-            dest='requirements',
-            action='append',
-            default=[],
-            metavar='file',
-            help="Use the order in the given requirements file and its "
-                 "comments when generating output. This option can be "
-                 "used multiple times.")
-        self.cmd_opts.add_option(
-            '-f', '--find-links',
-            dest='find_links',
-            action='append',
-            default=[],
-            metavar='URL',
-            help='URL for finding packages, which will be added to the '
-                 'output.')
-        self.cmd_opts.add_option(
-            '-l', '--local',
-            dest='local',
-            action='store_true',
-            default=False,
-            help='If in a virtualenv that has global access, do not output '
-                 'globally-installed packages.')
-        self.cmd_opts.add_option(
-            '--user',
-            dest='user',
-            action='store_true',
-            default=False,
-            help='Only output packages installed in user-site.')
-        self.cmd_opts.add_option(
-            '--all',
-            dest='freeze_all',
-            action='store_true',
-            help='Do not skip these packages in the output:'
-                 ' %s' % ', '.join(DEV_PKGS))
-        self.cmd_opts.add_option(
-            '--exclude-editable',
-            dest='exclude_editable',
-            action='store_true',
-            help='Exclude editable package from output.')
-
-        self.parser.insert_option_group(0, self.cmd_opts)
-
-    def run(self, options, args):
-        format_control = FormatControl(set(), set())
-        wheel_cache = WheelCache(options.cache_dir, format_control)
-        skip = set(stdlib_pkgs)
-        if not options.freeze_all:
-            skip.update(DEV_PKGS)
-
-        freeze_kwargs = dict(
-            requirement=options.requirements,
-            find_links=options.find_links,
-            local_only=options.local,
-            user_only=options.user,
-            skip_regex=options.skip_requirements_regex,
-            isolated=options.isolated_mode,
-            wheel_cache=wheel_cache,
-            skip=skip,
-            exclude_editable=options.exclude_editable,
-        )
-
-        try:
-            for line in freeze(**freeze_kwargs):
-                sys.stdout.write(line + '\n')
-        finally:
-            wheel_cache.cleanup()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/hash.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/hash.py
deleted file mode 100644
index 423440e..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/hash.py
+++ /dev/null
@@ -1,57 +0,0 @@
-from __future__ import absolute_import
-
-import hashlib
-import logging
-import sys
-
-from pip._internal.cli.base_command import Command
-from pip._internal.cli.status_codes import ERROR
-from pip._internal.utils.hashes import FAVORITE_HASH, STRONG_HASHES
-from pip._internal.utils.misc import read_chunks
-
-logger = logging.getLogger(__name__)
-
-
-class HashCommand(Command):
-    """
-    Compute a hash of a local package archive.
-
-    These can be used with --hash in a requirements file to do repeatable
-    installs.
-
-    """
-    name = 'hash'
-    usage = '%prog [options] <file> ...'
-    summary = 'Compute hashes of package archives.'
-    ignore_require_venv = True
-
-    def __init__(self, *args, **kw):
-        super(HashCommand, self).__init__(*args, **kw)
-        self.cmd_opts.add_option(
-            '-a', '--algorithm',
-            dest='algorithm',
-            choices=STRONG_HASHES,
-            action='store',
-            default=FAVORITE_HASH,
-            help='The hash algorithm to use: one of %s' %
-                 ', '.join(STRONG_HASHES))
-        self.parser.insert_option_group(0, self.cmd_opts)
-
-    def run(self, options, args):
-        if not args:
-            self.parser.print_usage(sys.stderr)
-            return ERROR
-
-        algorithm = options.algorithm
-        for path in args:
-            logger.info('%s:\n--hash=%s:%s',
-                        path, algorithm, _hash_of_file(path, algorithm))
-
-
-def _hash_of_file(path, algorithm):
-    """Return the hash digest of a file."""
-    with open(path, 'rb') as archive:
-        hash = hashlib.new(algorithm)
-        for chunk in read_chunks(archive):
-            hash.update(chunk)
-    return hash.hexdigest()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/help.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/help.py
deleted file mode 100644
index 49a81cb..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/help.py
+++ /dev/null
@@ -1,37 +0,0 @@
-from __future__ import absolute_import
-
-from pip._internal.cli.base_command import Command
-from pip._internal.cli.status_codes import SUCCESS
-from pip._internal.exceptions import CommandError
-
-
-class HelpCommand(Command):
-    """Show help for commands"""
-    name = 'help'
-    usage = """
-      %prog <command>"""
-    summary = 'Show help for commands.'
-    ignore_require_venv = True
-
-    def run(self, options, args):
-        from pip._internal.commands import commands_dict, get_similar_commands
-
-        try:
-            # 'pip help' with no args is handled by pip.__init__.parseopt()
-            cmd_name = args[0]  # the command we need help for
-        except IndexError:
-            return SUCCESS
-
-        if cmd_name not in commands_dict:
-            guess = get_similar_commands(cmd_name)
-
-            msg = ['unknown command "%s"' % cmd_name]
-            if guess:
-                msg.append('maybe you meant "%s"' % guess)
-
-            raise CommandError(' - '.join(msg))
-
-        command = commands_dict[cmd_name]()
-        command.parser.print_help()
-
-        return SUCCESS
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/install.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/install.py
deleted file mode 100644
index 1c244d2..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/install.py
+++ /dev/null
@@ -1,566 +0,0 @@
-from __future__ import absolute_import
-
-import errno
-import logging
-import operator
-import os
-import shutil
-from optparse import SUPPRESS_HELP
-
-from pip._vendor import pkg_resources
-
-from pip._internal.cache import WheelCache
-from pip._internal.cli import cmdoptions
-from pip._internal.cli.base_command import RequirementCommand
-from pip._internal.cli.status_codes import ERROR
-from pip._internal.exceptions import (
-    CommandError, InstallationError, PreviousBuildDirError,
-)
-from pip._internal.locations import distutils_scheme, virtualenv_no_global
-from pip._internal.operations.check import check_install_conflicts
-from pip._internal.operations.prepare import RequirementPreparer
-from pip._internal.req import RequirementSet, install_given_reqs
-from pip._internal.req.req_tracker import RequirementTracker
-from pip._internal.resolve import Resolver
-from pip._internal.utils.filesystem import check_path_owner
-from pip._internal.utils.misc import (
-    ensure_dir, get_installed_version,
-    protect_pip_from_modification_on_windows,
-)
-from pip._internal.utils.temp_dir import TempDirectory
-from pip._internal.wheel import WheelBuilder
-
-logger = logging.getLogger(__name__)
-
-
-class InstallCommand(RequirementCommand):
-    """
-    Install packages from:
-
-    - PyPI (and other indexes) using requirement specifiers.
-    - VCS project urls.
-    - Local project directories.
-    - Local or remote source archives.
-
-    pip also supports installing from "requirements files", which provide
-    an easy way to specify a whole environment to be installed.
-    """
-    name = 'install'
-
-    usage = """
-      %prog [options] <requirement specifier> [package-index-options] ...
-      %prog [options] -r <requirements file> [package-index-options] ...
-      %prog [options] [-e] <vcs project url> ...
-      %prog [options] [-e] <local project path> ...
-      %prog [options] <archive url/path> ..."""
-
-    summary = 'Install packages.'
-
-    def __init__(self, *args, **kw):
-        super(InstallCommand, self).__init__(*args, **kw)
-
-        cmd_opts = self.cmd_opts
-
-        cmd_opts.add_option(cmdoptions.requirements())
-        cmd_opts.add_option(cmdoptions.constraints())
-        cmd_opts.add_option(cmdoptions.no_deps())
-        cmd_opts.add_option(cmdoptions.pre())
-
-        cmd_opts.add_option(cmdoptions.editable())
-        cmd_opts.add_option(
-            '-t', '--target',
-            dest='target_dir',
-            metavar='dir',
-            default=None,
-            help='Install packages into <dir>. '
-                 'By default this will not replace existing files/folders in '
-                 '<dir>. Use --upgrade to replace existing packages in <dir> '
-                 'with new versions.'
-        )
-        cmd_opts.add_option(cmdoptions.platform())
-        cmd_opts.add_option(cmdoptions.python_version())
-        cmd_opts.add_option(cmdoptions.implementation())
-        cmd_opts.add_option(cmdoptions.abi())
-
-        cmd_opts.add_option(
-            '--user',
-            dest='use_user_site',
-            action='store_true',
-            help="Install to the Python user install directory for your "
-                 "platform. Typically ~/.local/, or %APPDATA%\\Python on "
-                 "Windows. (See the Python documentation for site.USER_BASE "
-                 "for full details.)")
-        cmd_opts.add_option(
-            '--no-user',
-            dest='use_user_site',
-            action='store_false',
-            help=SUPPRESS_HELP)
-        cmd_opts.add_option(
-            '--root',
-            dest='root_path',
-            metavar='dir',
-            default=None,
-            help="Install everything relative to this alternate root "
-                 "directory.")
-        cmd_opts.add_option(
-            '--prefix',
-            dest='prefix_path',
-            metavar='dir',
-            default=None,
-            help="Installation prefix where lib, bin and other top-level "
-                 "folders are placed")
-
-        cmd_opts.add_option(cmdoptions.build_dir())
-
-        cmd_opts.add_option(cmdoptions.src())
-
-        cmd_opts.add_option(
-            '-U', '--upgrade',
-            dest='upgrade',
-            action='store_true',
-            help='Upgrade all specified packages to the newest available '
-                 'version. The handling of dependencies depends on the '
-                 'upgrade-strategy used.'
-        )
-
-        cmd_opts.add_option(
-            '--upgrade-strategy',
-            dest='upgrade_strategy',
-            default='only-if-needed',
-            choices=['only-if-needed', 'eager'],
-            help='Determines how dependency upgrading should be handled '
-                 '[default: %default]. '
-                 '"eager" - dependencies are upgraded regardless of '
-                 'whether the currently installed version satisfies the '
-                 'requirements of the upgraded package(s). '
-                 '"only-if-needed" -  are upgraded only when they do not '
-                 'satisfy the requirements of the upgraded package(s).'
-        )
-
-        cmd_opts.add_option(
-            '--force-reinstall',
-            dest='force_reinstall',
-            action='store_true',
-            help='Reinstall all packages even if they are already '
-                 'up-to-date.')
-
-        cmd_opts.add_option(
-            '-I', '--ignore-installed',
-            dest='ignore_installed',
-            action='store_true',
-            help='Ignore the installed packages (reinstalling instead).')
-
-        cmd_opts.add_option(cmdoptions.ignore_requires_python())
-        cmd_opts.add_option(cmdoptions.no_build_isolation())
-        cmd_opts.add_option(cmdoptions.use_pep517())
-        cmd_opts.add_option(cmdoptions.no_use_pep517())
-
-        cmd_opts.add_option(cmdoptions.install_options())
-        cmd_opts.add_option(cmdoptions.global_options())
-
-        cmd_opts.add_option(
-            "--compile",
-            action="store_true",
-            dest="compile",
-            default=True,
-            help="Compile Python source files to bytecode",
-        )
-
-        cmd_opts.add_option(
-            "--no-compile",
-            action="store_false",
-            dest="compile",
-            help="Do not compile Python source files to bytecode",
-        )
-
-        cmd_opts.add_option(
-            "--no-warn-script-location",
-            action="store_false",
-            dest="warn_script_location",
-            default=True,
-            help="Do not warn when installing scripts outside PATH",
-        )
-        cmd_opts.add_option(
-            "--no-warn-conflicts",
-            action="store_false",
-            dest="warn_about_conflicts",
-            default=True,
-            help="Do not warn about broken dependencies",
-        )
-
-        cmd_opts.add_option(cmdoptions.no_binary())
-        cmd_opts.add_option(cmdoptions.only_binary())
-        cmd_opts.add_option(cmdoptions.prefer_binary())
-        cmd_opts.add_option(cmdoptions.no_clean())
-        cmd_opts.add_option(cmdoptions.require_hashes())
-        cmd_opts.add_option(cmdoptions.progress_bar())
-
-        index_opts = cmdoptions.make_option_group(
-            cmdoptions.index_group,
-            self.parser,
-        )
-
-        self.parser.insert_option_group(0, index_opts)
-        self.parser.insert_option_group(0, cmd_opts)
-
-    def run(self, options, args):
-        cmdoptions.check_install_build_global(options)
-        upgrade_strategy = "to-satisfy-only"
-        if options.upgrade:
-            upgrade_strategy = options.upgrade_strategy
-
-        if options.build_dir:
-            options.build_dir = os.path.abspath(options.build_dir)
-
-        cmdoptions.check_dist_restriction(options, check_target=True)
-
-        if options.python_version:
-            python_versions = [options.python_version]
-        else:
-            python_versions = None
-
-        options.src_dir = os.path.abspath(options.src_dir)
-        install_options = options.install_options or []
-        if options.use_user_site:
-            if options.prefix_path:
-                raise CommandError(
-                    "Can not combine '--user' and '--prefix' as they imply "
-                    "different installation locations"
-                )
-            if virtualenv_no_global():
-                raise InstallationError(
-                    "Can not perform a '--user' install. User site-packages "
-                    "are not visible in this virtualenv."
-                )
-            install_options.append('--user')
-            install_options.append('--prefix=')
-
-        target_temp_dir = TempDirectory(kind="target")
-        if options.target_dir:
-            options.ignore_installed = True
-            options.target_dir = os.path.abspath(options.target_dir)
-            if (os.path.exists(options.target_dir) and not
-                    os.path.isdir(options.target_dir)):
-                raise CommandError(
-                    "Target path exists but is not a directory, will not "
-                    "continue."
-                )
-
-            # Create a target directory for using with the target option
-            target_temp_dir.create()
-            install_options.append('--home=' + target_temp_dir.path)
-
-        global_options = options.global_options or []
-
-        with self._build_session(options) as session:
-            finder = self._build_package_finder(
-                options=options,
-                session=session,
-                platform=options.platform,
-                python_versions=python_versions,
-                abi=options.abi,
-                implementation=options.implementation,
-            )
-            build_delete = (not (options.no_clean or options.build_dir))
-            wheel_cache = WheelCache(options.cache_dir, options.format_control)
-
-            if options.cache_dir and not check_path_owner(options.cache_dir):
-                logger.warning(
-                    "The directory '%s' or its parent directory is not owned "
-                    "by the current user and caching wheels has been "
-                    "disabled. check the permissions and owner of that "
-                    "directory. If executing pip with sudo, you may want "
-                    "sudo's -H flag.",
-                    options.cache_dir,
-                )
-                options.cache_dir = None
-
-            with RequirementTracker() as req_tracker, TempDirectory(
-                options.build_dir, delete=build_delete, kind="install"
-            ) as directory:
-                requirement_set = RequirementSet(
-                    require_hashes=options.require_hashes,
-                    check_supported_wheels=not options.target_dir,
-                )
-
-                try:
-                    self.populate_requirement_set(
-                        requirement_set, args, options, finder, session,
-                        self.name, wheel_cache
-                    )
-                    preparer = RequirementPreparer(
-                        build_dir=directory.path,
-                        src_dir=options.src_dir,
-                        download_dir=None,
-                        wheel_download_dir=None,
-                        progress_bar=options.progress_bar,
-                        build_isolation=options.build_isolation,
-                        req_tracker=req_tracker,
-                    )
-
-                    resolver = Resolver(
-                        preparer=preparer,
-                        finder=finder,
-                        session=session,
-                        wheel_cache=wheel_cache,
-                        use_user_site=options.use_user_site,
-                        upgrade_strategy=upgrade_strategy,
-                        force_reinstall=options.force_reinstall,
-                        ignore_dependencies=options.ignore_dependencies,
-                        ignore_requires_python=options.ignore_requires_python,
-                        ignore_installed=options.ignore_installed,
-                        isolated=options.isolated_mode,
-                        use_pep517=options.use_pep517
-                    )
-                    resolver.resolve(requirement_set)
-
-                    protect_pip_from_modification_on_windows(
-                        modifying_pip=requirement_set.has_requirement("pip")
-                    )
-
-                    # Consider legacy and PEP517-using requirements separately
-                    legacy_requirements = []
-                    pep517_requirements = []
-                    for req in requirement_set.requirements.values():
-                        if req.use_pep517:
-                            pep517_requirements.append(req)
-                        else:
-                            legacy_requirements.append(req)
-
-                    # We don't build wheels for legacy requirements if we
-                    # don't have wheel installed or we don't have a cache dir
-                    try:
-                        import wheel  # noqa: F401
-                        build_legacy = bool(options.cache_dir)
-                    except ImportError:
-                        build_legacy = False
-
-                    wb = WheelBuilder(
-                        finder, preparer, wheel_cache,
-                        build_options=[], global_options=[],
-                    )
-
-                    # Always build PEP 517 requirements
-                    build_failures = wb.build(
-                        pep517_requirements,
-                        session=session, autobuilding=True
-                    )
-
-                    if build_legacy:
-                        # We don't care about failures building legacy
-                        # requirements, as we'll fall through to a direct
-                        # install for those.
-                        wb.build(
-                            legacy_requirements,
-                            session=session, autobuilding=True
-                        )
-
-                    # If we're using PEP 517, we cannot do a direct install
-                    # so we fail here.
-                    if build_failures:
-                        raise InstallationError(
-                            "Could not build wheels for {} which use"
-                            " PEP 517 and cannot be installed directly".format(
-                                ", ".join(r.name for r in build_failures)))
-
-                    to_install = resolver.get_installation_order(
-                        requirement_set
-                    )
-
-                    # Consistency Checking of the package set we're installing.
-                    should_warn_about_conflicts = (
-                        not options.ignore_dependencies and
-                        options.warn_about_conflicts
-                    )
-                    if should_warn_about_conflicts:
-                        self._warn_about_conflicts(to_install)
-
-                    # Don't warn about script install locations if
-                    # --target has been specified
-                    warn_script_location = options.warn_script_location
-                    if options.target_dir:
-                        warn_script_location = False
-
-                    installed = install_given_reqs(
-                        to_install,
-                        install_options,
-                        global_options,
-                        root=options.root_path,
-                        home=target_temp_dir.path,
-                        prefix=options.prefix_path,
-                        pycompile=options.compile,
-                        warn_script_location=warn_script_location,
-                        use_user_site=options.use_user_site,
-                    )
-
-                    lib_locations = get_lib_location_guesses(
-                        user=options.use_user_site,
-                        home=target_temp_dir.path,
-                        root=options.root_path,
-                        prefix=options.prefix_path,
-                        isolated=options.isolated_mode,
-                    )
-                    working_set = pkg_resources.WorkingSet(lib_locations)
-
-                    reqs = sorted(installed, key=operator.attrgetter('name'))
-                    items = []
-                    for req in reqs:
-                        item = req.name
-                        try:
-                            installed_version = get_installed_version(
-                                req.name, working_set=working_set
-                            )
-                            if installed_version:
-                                item += '-' + installed_version
-                        except Exception:
-                            pass
-                        items.append(item)
-                    installed = ' '.join(items)
-                    if installed:
-                        logger.info('Successfully installed %s', installed)
-                except EnvironmentError as error:
-                    show_traceback = (self.verbosity >= 1)
-
-                    message = create_env_error_message(
-                        error, show_traceback, options.use_user_site,
-                    )
-                    logger.error(message, exc_info=show_traceback)
-
-                    return ERROR
-                except PreviousBuildDirError:
-                    options.no_clean = True
-                    raise
-                finally:
-                    # Clean up
-                    if not options.no_clean:
-                        requirement_set.cleanup_files()
-                        wheel_cache.cleanup()
-
-        if options.target_dir:
-            self._handle_target_dir(
-                options.target_dir, target_temp_dir, options.upgrade
-            )
-        return requirement_set
-
-    def _handle_target_dir(self, target_dir, target_temp_dir, upgrade):
-        ensure_dir(target_dir)
-
-        # Checking both purelib and platlib directories for installed
-        # packages to be moved to target directory
-        lib_dir_list = []
-
-        with target_temp_dir:
-            # Checking both purelib and platlib directories for installed
-            # packages to be moved to target directory
-            scheme = distutils_scheme('', home=target_temp_dir.path)
-            purelib_dir = scheme['purelib']
-            platlib_dir = scheme['platlib']
-            data_dir = scheme['data']
-
-            if os.path.exists(purelib_dir):
-                lib_dir_list.append(purelib_dir)
-            if os.path.exists(platlib_dir) and platlib_dir != purelib_dir:
-                lib_dir_list.append(platlib_dir)
-            if os.path.exists(data_dir):
-                lib_dir_list.append(data_dir)
-
-            for lib_dir in lib_dir_list:
-                for item in os.listdir(lib_dir):
-                    if lib_dir == data_dir:
-                        ddir = os.path.join(data_dir, item)
-                        if any(s.startswith(ddir) for s in lib_dir_list[:-1]):
-                            continue
-                    target_item_dir = os.path.join(target_dir, item)
-                    if os.path.exists(target_item_dir):
-                        if not upgrade:
-                            logger.warning(
-                                'Target directory %s already exists. Specify '
-                                '--upgrade to force replacement.',
-                                target_item_dir
-                            )
-                            continue
-                        if os.path.islink(target_item_dir):
-                            logger.warning(
-                                'Target directory %s already exists and is '
-                                'a link. Pip will not automatically replace '
-                                'links, please remove if replacement is '
-                                'desired.',
-                                target_item_dir
-                            )
-                            continue
-                        if os.path.isdir(target_item_dir):
-                            shutil.rmtree(target_item_dir)
-                        else:
-                            os.remove(target_item_dir)
-
-                    shutil.move(
-                        os.path.join(lib_dir, item),
-                        target_item_dir
-                    )
-
-    def _warn_about_conflicts(self, to_install):
-        try:
-            package_set, _dep_info = check_install_conflicts(to_install)
-        except Exception:
-            logger.error("Error checking for conflicts.", exc_info=True)
-            return
-        missing, conflicting = _dep_info
-
-        # NOTE: There is some duplication here from pip check
-        for project_name in missing:
-            version = package_set[project_name][0]
-            for dependency in missing[project_name]:
-                logger.critical(
-                    "%s %s requires %s, which is not installed.",
-                    project_name, version, dependency[1],
-                )
-
-        for project_name in conflicting:
-            version = package_set[project_name][0]
-            for dep_name, dep_version, req in conflicting[project_name]:
-                logger.critical(
-                    "%s %s has requirement %s, but you'll have %s %s which is "
-                    "incompatible.",
-                    project_name, version, req, dep_name, dep_version,
-                )
-
-
-def get_lib_location_guesses(*args, **kwargs):
-    scheme = distutils_scheme('', *args, **kwargs)
-    return [scheme['purelib'], scheme['platlib']]
-
-
-def create_env_error_message(error, show_traceback, using_user_site):
-    """Format an error message for an EnvironmentError
-
-    It may occur anytime during the execution of the install command.
-    """
-    parts = []
-
-    # Mention the error if we are not going to show a traceback
-    parts.append("Could not install packages due to an EnvironmentError")
-    if not show_traceback:
-        parts.append(": ")
-        parts.append(str(error))
-    else:
-        parts.append(".")
-
-    # Spilt the error indication from a helper message (if any)
-    parts[-1] += "\n"
-
-    # Suggest useful actions to the user:
-    #  (1) using user site-packages or (2) verifying the permissions
-    if error.errno == errno.EACCES:
-        user_option_part = "Consider using the `--user` option"
-        permissions_part = "Check the permissions"
-
-        if not using_user_site:
-            parts.extend([
-                user_option_part, " or ",
-                permissions_part.lower(),
-            ])
-        else:
-            parts.append(permissions_part)
-        parts.append(".\n")
-
-    return "".join(parts).strip() + "\n"
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/list.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/list.py
deleted file mode 100644
index a640274..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/list.py
+++ /dev/null
@@ -1,301 +0,0 @@
-from __future__ import absolute_import
-
-import json
-import logging
-
-from pip._vendor import six
-from pip._vendor.six.moves import zip_longest
-
-from pip._internal.cli import cmdoptions
-from pip._internal.cli.base_command import Command
-from pip._internal.exceptions import CommandError
-from pip._internal.index import PackageFinder
-from pip._internal.utils.misc import (
-    dist_is_editable, get_installed_distributions,
-)
-from pip._internal.utils.packaging import get_installer
-
-logger = logging.getLogger(__name__)
-
-
-class ListCommand(Command):
-    """
-    List installed packages, including editables.
-
-    Packages are listed in a case-insensitive sorted order.
-    """
-    name = 'list'
-    usage = """
-      %prog [options]"""
-    summary = 'List installed packages.'
-
-    def __init__(self, *args, **kw):
-        super(ListCommand, self).__init__(*args, **kw)
-
-        cmd_opts = self.cmd_opts
-
-        cmd_opts.add_option(
-            '-o', '--outdated',
-            action='store_true',
-            default=False,
-            help='List outdated packages')
-        cmd_opts.add_option(
-            '-u', '--uptodate',
-            action='store_true',
-            default=False,
-            help='List uptodate packages')
-        cmd_opts.add_option(
-            '-e', '--editable',
-            action='store_true',
-            default=False,
-            help='List editable projects.')
-        cmd_opts.add_option(
-            '-l', '--local',
-            action='store_true',
-            default=False,
-            help=('If in a virtualenv that has global access, do not list '
-                  'globally-installed packages.'),
-        )
-        self.cmd_opts.add_option(
-            '--user',
-            dest='user',
-            action='store_true',
-            default=False,
-            help='Only output packages installed in user-site.')
-
-        cmd_opts.add_option(
-            '--pre',
-            action='store_true',
-            default=False,
-            help=("Include pre-release and development versions. By default, "
-                  "pip only finds stable versions."),
-        )
-
-        cmd_opts.add_option(
-            '--format',
-            action='store',
-            dest='list_format',
-            default="columns",
-            choices=('columns', 'freeze', 'json'),
-            help="Select the output format among: columns (default), freeze, "
-                 "or json",
-        )
-
-        cmd_opts.add_option(
-            '--not-required',
-            action='store_true',
-            dest='not_required',
-            help="List packages that are not dependencies of "
-                 "installed packages.",
-        )
-
-        cmd_opts.add_option(
-            '--exclude-editable',
-            action='store_false',
-            dest='include_editable',
-            help='Exclude editable package from output.',
-        )
-        cmd_opts.add_option(
-            '--include-editable',
-            action='store_true',
-            dest='include_editable',
-            help='Include editable package from output.',
-            default=True,
-        )
-        index_opts = cmdoptions.make_option_group(
-            cmdoptions.index_group, self.parser
-        )
-
-        self.parser.insert_option_group(0, index_opts)
-        self.parser.insert_option_group(0, cmd_opts)
-
-    def _build_package_finder(self, options, index_urls, session):
-        """
-        Create a package finder appropriate to this list command.
-        """
-        return PackageFinder(
-            find_links=options.find_links,
-            index_urls=index_urls,
-            allow_all_prereleases=options.pre,
-            trusted_hosts=options.trusted_hosts,
-            session=session,
-        )
-
-    def run(self, options, args):
-        if options.outdated and options.uptodate:
-            raise CommandError(
-                "Options --outdated and --uptodate cannot be combined.")
-
-        packages = get_installed_distributions(
-            local_only=options.local,
-            user_only=options.user,
-            editables_only=options.editable,
-            include_editables=options.include_editable,
-        )
-
-        # get_not_required must be called firstly in order to find and
-        # filter out all dependencies correctly. Otherwise a package
-        # can't be identified as requirement because some parent packages
-        # could be filtered out before.
-        if options.not_required:
-            packages = self.get_not_required(packages, options)
-
-        if options.outdated:
-            packages = self.get_outdated(packages, options)
-        elif options.uptodate:
-            packages = self.get_uptodate(packages, options)
-
-        self.output_package_listing(packages, options)
-
-    def get_outdated(self, packages, options):
-        return [
-            dist for dist in self.iter_packages_latest_infos(packages, options)
-            if dist.latest_version > dist.parsed_version
-        ]
-
-    def get_uptodate(self, packages, options):
-        return [
-            dist for dist in self.iter_packages_latest_infos(packages, options)
-            if dist.latest_version == dist.parsed_version
-        ]
-
-    def get_not_required(self, packages, options):
-        dep_keys = set()
-        for dist in packages:
-            dep_keys.update(requirement.key for requirement in dist.requires())
-        return {pkg for pkg in packages if pkg.key not in dep_keys}
-
-    def iter_packages_latest_infos(self, packages, options):
-        index_urls = [options.index_url] + options.extra_index_urls
-        if options.no_index:
-            logger.debug('Ignoring indexes: %s', ','.join(index_urls))
-            index_urls = []
-
-        with self._build_session(options) as session:
-            finder = self._build_package_finder(options, index_urls, session)
-
-            for dist in packages:
-                typ = 'unknown'
-                all_candidates = finder.find_all_candidates(dist.key)
-                if not options.pre:
-                    # Remove prereleases
-                    all_candidates = [candidate for candidate in all_candidates
-                                      if not candidate.version.is_prerelease]
-
-                if not all_candidates:
-                    continue
-                best_candidate = max(all_candidates,
-                                     key=finder._candidate_sort_key)
-                remote_version = best_candidate.version
-                if best_candidate.location.is_wheel:
-                    typ = 'wheel'
-                else:
-                    typ = 'sdist'
-                # This is dirty but makes the rest of the code much cleaner
-                dist.latest_version = remote_version
-                dist.latest_filetype = typ
-                yield dist
-
-    def output_package_listing(self, packages, options):
-        packages = sorted(
-            packages,
-            key=lambda dist: dist.project_name.lower(),
-        )
-        if options.list_format == 'columns' and packages:
-            data, header = format_for_columns(packages, options)
-            self.output_package_listing_columns(data, header)
-        elif options.list_format == 'freeze':
-            for dist in packages:
-                if options.verbose >= 1:
-                    logger.info("%s==%s (%s)", dist.project_name,
-                                dist.version, dist.location)
-                else:
-                    logger.info("%s==%s", dist.project_name, dist.version)
-        elif options.list_format == 'json':
-            logger.info(format_for_json(packages, options))
-
-    def output_package_listing_columns(self, data, header):
-        # insert the header first: we need to know the size of column names
-        if len(data) > 0:
-            data.insert(0, header)
-
-        pkg_strings, sizes = tabulate(data)
-
-        # Create and add a separator.
-        if len(data) > 0:
-            pkg_strings.insert(1, " ".join(map(lambda x: '-' * x, sizes)))
-
-        for val in pkg_strings:
-            logger.info(val)
-
-
-def tabulate(vals):
-    # From pfmoore on GitHub:
-    # https://github.com/pypa/pip/issues/3651#issuecomment-216932564
-    assert len(vals) > 0
-
-    sizes = [0] * max(len(x) for x in vals)
-    for row in vals:
-        sizes = [max(s, len(str(c))) for s, c in zip_longest(sizes, row)]
-
-    result = []
-    for row in vals:
-        display = " ".join([str(c).ljust(s) if c is not None else ''
-                            for s, c in zip_longest(sizes, row)])
-        result.append(display)
-
-    return result, sizes
-
-
-def format_for_columns(pkgs, options):
-    """
-    Convert the package data into something usable
-    by output_package_listing_columns.
-    """
-    running_outdated = options.outdated
-    # Adjust the header for the `pip list --outdated` case.
-    if running_outdated:
-        header = ["Package", "Version", "Latest", "Type"]
-    else:
-        header = ["Package", "Version"]
-
-    data = []
-    if options.verbose >= 1 or any(dist_is_editable(x) for x in pkgs):
-        header.append("Location")
-    if options.verbose >= 1:
-        header.append("Installer")
-
-    for proj in pkgs:
-        # if we're working on the 'outdated' list, separate out the
-        # latest_version and type
-        row = [proj.project_name, proj.version]
-
-        if running_outdated:
-            row.append(proj.latest_version)
-            row.append(proj.latest_filetype)
-
-        if options.verbose >= 1 or dist_is_editable(proj):
-            row.append(proj.location)
-        if options.verbose >= 1:
-            row.append(get_installer(proj))
-
-        data.append(row)
-
-    return data, header
-
-
-def format_for_json(packages, options):
-    data = []
-    for dist in packages:
-        info = {
-            'name': dist.project_name,
-            'version': six.text_type(dist.version),
-        }
-        if options.verbose >= 1:
-            info['location'] = dist.location
-            info['installer'] = get_installer(dist)
-        if options.outdated:
-            info['latest_version'] = six.text_type(dist.latest_version)
-            info['latest_filetype'] = dist.latest_filetype
-        data.append(info)
-    return json.dumps(data)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/search.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/search.py
deleted file mode 100644
index c157a31..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/search.py
+++ /dev/null
@@ -1,135 +0,0 @@
-from __future__ import absolute_import
-
-import logging
-import sys
-import textwrap
-from collections import OrderedDict
-
-from pip._vendor import pkg_resources
-from pip._vendor.packaging.version import parse as parse_version
-# NOTE: XMLRPC Client is not annotated in typeshed as on 2017-07-17, which is
-#       why we ignore the type on this import
-from pip._vendor.six.moves import xmlrpc_client  # type: ignore
-
-from pip._internal.cli.base_command import Command
-from pip._internal.cli.status_codes import NO_MATCHES_FOUND, SUCCESS
-from pip._internal.download import PipXmlrpcTransport
-from pip._internal.exceptions import CommandError
-from pip._internal.models.index import PyPI
-from pip._internal.utils.compat import get_terminal_size
-from pip._internal.utils.logging import indent_log
-
-logger = logging.getLogger(__name__)
-
-
-class SearchCommand(Command):
-    """Search for PyPI packages whose name or summary contains <query>."""
-    name = 'search'
-    usage = """
-      %prog [options] <query>"""
-    summary = 'Search PyPI for packages.'
-    ignore_require_venv = True
-
-    def __init__(self, *args, **kw):
-        super(SearchCommand, self).__init__(*args, **kw)
-        self.cmd_opts.add_option(
-            '-i', '--index',
-            dest='index',
-            metavar='URL',
-            default=PyPI.pypi_url,
-            help='Base URL of Python Package Index (default %default)')
-
-        self.parser.insert_option_group(0, self.cmd_opts)
-
-    def run(self, options, args):
-        if not args:
-            raise CommandError('Missing required argument (search query).')
-        query = args
-        pypi_hits = self.search(query, options)
-        hits = transform_hits(pypi_hits)
-
-        terminal_width = None
-        if sys.stdout.isatty():
-            terminal_width = get_terminal_size()[0]
-
-        print_results(hits, terminal_width=terminal_width)
-        if pypi_hits:
-            return SUCCESS
-        return NO_MATCHES_FOUND
-
-    def search(self, query, options):
-        index_url = options.index
-        with self._build_session(options) as session:
-            transport = PipXmlrpcTransport(index_url, session)
-            pypi = xmlrpc_client.ServerProxy(index_url, transport)
-            hits = pypi.search({'name': query, 'summary': query}, 'or')
-            return hits
-
-
-def transform_hits(hits):
-    """
-    The list from pypi is really a list of versions. We want a list of
-    packages with the list of versions stored inline. This converts the
-    list from pypi into one we can use.
-    """
-    packages = OrderedDict()
-    for hit in hits:
-        name = hit['name']
-        summary = hit['summary']
-        version = hit['version']
-
-        if name not in packages.keys():
-            packages[name] = {
-                'name': name,
-                'summary': summary,
-                'versions': [version],
-            }
-        else:
-            packages[name]['versions'].append(version)
-
-            # if this is the highest version, replace summary and score
-            if version == highest_version(packages[name]['versions']):
-                packages[name]['summary'] = summary
-
-    return list(packages.values())
-
-
-def print_results(hits, name_column_width=None, terminal_width=None):
-    if not hits:
-        return
-    if name_column_width is None:
-        name_column_width = max([
-            len(hit['name']) + len(highest_version(hit.get('versions', ['-'])))
-            for hit in hits
-        ]) + 4
-
-    installed_packages = [p.project_name for p in pkg_resources.working_set]
-    for hit in hits:
-        name = hit['name']
-        summary = hit['summary'] or ''
-        latest = highest_version(hit.get('versions', ['-']))
-        if terminal_width is not None:
-            target_width = terminal_width - name_column_width - 5
-            if target_width > 10:
-                # wrap and indent summary to fit terminal
-                summary = textwrap.wrap(summary, target_width)
-                summary = ('\n' + ' ' * (name_column_width + 3)).join(summary)
-
-        line = '%-*s - %s' % (name_column_width,
-                              '%s (%s)' % (name, latest), summary)
-        try:
-            logger.info(line)
-            if name in installed_packages:
-                dist = pkg_resources.get_distribution(name)
-                with indent_log():
-                    if dist.version == latest:
-                        logger.info('INSTALLED: %s (latest)', dist.version)
-                    else:
-                        logger.info('INSTALLED: %s', dist.version)
-                        logger.info('LATEST:    %s', latest)
-        except UnicodeEncodeError:
-            pass
-
-
-def highest_version(versions):
-    return max(versions, key=parse_version)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/show.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/show.py
deleted file mode 100644
index f92c9bc..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/show.py
+++ /dev/null
@@ -1,168 +0,0 @@
-from __future__ import absolute_import
-
-import logging
-import os
-from email.parser import FeedParser  # type: ignore
-
-from pip._vendor import pkg_resources
-from pip._vendor.packaging.utils import canonicalize_name
-
-from pip._internal.cli.base_command import Command
-from pip._internal.cli.status_codes import ERROR, SUCCESS
-
-logger = logging.getLogger(__name__)
-
-
-class ShowCommand(Command):
-    """
-    Show information about one or more installed packages.
-
-    The output is in RFC-compliant mail header format.
-    """
-    name = 'show'
-    usage = """
-      %prog [options] <package> ..."""
-    summary = 'Show information about installed packages.'
-    ignore_require_venv = True
-
-    def __init__(self, *args, **kw):
-        super(ShowCommand, self).__init__(*args, **kw)
-        self.cmd_opts.add_option(
-            '-f', '--files',
-            dest='files',
-            action='store_true',
-            default=False,
-            help='Show the full list of installed files for each package.')
-
-        self.parser.insert_option_group(0, self.cmd_opts)
-
-    def run(self, options, args):
-        if not args:
-            logger.warning('ERROR: Please provide a package name or names.')
-            return ERROR
-        query = args
-
-        results = search_packages_info(query)
-        if not print_results(
-                results, list_files=options.files, verbose=options.verbose):
-            return ERROR
-        return SUCCESS
-
-
-def search_packages_info(query):
-    """
-    Gather details from installed distributions. Print distribution name,
-    version, location, and installed files. Installed files requires a
-    pip generated 'installed-files.txt' in the distributions '.egg-info'
-    directory.
-    """
-    installed = {}
-    for p in pkg_resources.working_set:
-        installed[canonicalize_name(p.project_name)] = p
-
-    query_names = [canonicalize_name(name) for name in query]
-
-    for dist in [installed[pkg] for pkg in query_names if pkg in installed]:
-        package = {
-            'name': dist.project_name,
-            'version': dist.version,
-            'location': dist.location,
-            'requires': [dep.project_name for dep in dist.requires()],
-        }
-        file_list = None
-        metadata = None
-        if isinstance(dist, pkg_resources.DistInfoDistribution):
-            # RECORDs should be part of .dist-info metadatas
-            if dist.has_metadata('RECORD'):
-                lines = dist.get_metadata_lines('RECORD')
-                paths = [l.split(',')[0] for l in lines]
-                paths = [os.path.join(dist.location, p) for p in paths]
-                file_list = [os.path.relpath(p, dist.location) for p in paths]
-
-            if dist.has_metadata('METADATA'):
-                metadata = dist.get_metadata('METADATA')
-        else:
-            # Otherwise use pip's log for .egg-info's
-            if dist.has_metadata('installed-files.txt'):
-                paths = dist.get_metadata_lines('installed-files.txt')
-                paths = [os.path.join(dist.egg_info, p) for p in paths]
-                file_list = [os.path.relpath(p, dist.location) for p in paths]
-
-            if dist.has_metadata('PKG-INFO'):
-                metadata = dist.get_metadata('PKG-INFO')
-
-        if dist.has_metadata('entry_points.txt'):
-            entry_points = dist.get_metadata_lines('entry_points.txt')
-            package['entry_points'] = entry_points
-
-        if dist.has_metadata('INSTALLER'):
-            for line in dist.get_metadata_lines('INSTALLER'):
-                if line.strip():
-                    package['installer'] = line.strip()
-                    break
-
-        # @todo: Should pkg_resources.Distribution have a
-        # `get_pkg_info` method?
-        feed_parser = FeedParser()
-        feed_parser.feed(metadata)
-        pkg_info_dict = feed_parser.close()
-        for key in ('metadata-version', 'summary',
-                    'home-page', 'author', 'author-email', 'license'):
-            package[key] = pkg_info_dict.get(key)
-
-        # It looks like FeedParser cannot deal with repeated headers
-        classifiers = []
-        for line in metadata.splitlines():
-            if line.startswith('Classifier: '):
-                classifiers.append(line[len('Classifier: '):])
-        package['classifiers'] = classifiers
-
-        if file_list:
-            package['files'] = sorted(file_list)
-        yield package
-
-
-def print_results(distributions, list_files=False, verbose=False):
-    """
-    Print the informations from installed distributions found.
-    """
-    results_printed = False
-    for i, dist in enumerate(distributions):
-        results_printed = True
-        if i > 0:
-            logger.info("---")
-
-        name = dist.get('name', '')
-        required_by = [
-            pkg.project_name for pkg in pkg_resources.working_set
-            if name in [required.name for required in pkg.requires()]
-        ]
-
-        logger.info("Name: %s", name)
-        logger.info("Version: %s", dist.get('version', ''))
-        logger.info("Summary: %s", dist.get('summary', ''))
-        logger.info("Home-page: %s", dist.get('home-page', ''))
-        logger.info("Author: %s", dist.get('author', ''))
-        logger.info("Author-email: %s", dist.get('author-email', ''))
-        logger.info("License: %s", dist.get('license', ''))
-        logger.info("Location: %s", dist.get('location', ''))
-        logger.info("Requires: %s", ', '.join(dist.get('requires', [])))
-        logger.info("Required-by: %s", ', '.join(required_by))
-
-        if verbose:
-            logger.info("Metadata-Version: %s",
-                        dist.get('metadata-version', ''))
-            logger.info("Installer: %s", dist.get('installer', ''))
-            logger.info("Classifiers:")
-            for classifier in dist.get('classifiers', []):
-                logger.info("  %s", classifier)
-            logger.info("Entry-points:")
-            for entry in dist.get('entry_points', []):
-                logger.info("  %s", entry.strip())
-        if list_files:
-            logger.info("Files:")
-            for line in dist.get('files', []):
-                logger.info("  %s", line.strip())
-            if "files" not in dist:
-                logger.info("Cannot locate installed-files.txt")
-    return results_printed
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/uninstall.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/uninstall.py
deleted file mode 100644
index 0cd6f54..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/uninstall.py
+++ /dev/null
@@ -1,78 +0,0 @@
-from __future__ import absolute_import
-
-from pip._vendor.packaging.utils import canonicalize_name
-
-from pip._internal.cli.base_command import Command
-from pip._internal.exceptions import InstallationError
-from pip._internal.req import parse_requirements
-from pip._internal.req.constructors import install_req_from_line
-from pip._internal.utils.misc import protect_pip_from_modification_on_windows
-
-
-class UninstallCommand(Command):
-    """
-    Uninstall packages.
-
-    pip is able to uninstall most installed packages. Known exceptions are:
-
-    - Pure distutils packages installed with ``python setup.py install``, which
-      leave behind no metadata to determine what files were installed.
-    - Script wrappers installed by ``python setup.py develop``.
-    """
-    name = 'uninstall'
-    usage = """
-      %prog [options] <package> ...
-      %prog [options] -r <requirements file> ..."""
-    summary = 'Uninstall packages.'
-
-    def __init__(self, *args, **kw):
-        super(UninstallCommand, self).__init__(*args, **kw)
-        self.cmd_opts.add_option(
-            '-r', '--requirement',
-            dest='requirements',
-            action='append',
-            default=[],
-            metavar='file',
-            help='Uninstall all the packages listed in the given requirements '
-                 'file.  This option can be used multiple times.',
-        )
-        self.cmd_opts.add_option(
-            '-y', '--yes',
-            dest='yes',
-            action='store_true',
-            help="Don't ask for confirmation of uninstall deletions.")
-
-        self.parser.insert_option_group(0, self.cmd_opts)
-
-    def run(self, options, args):
-        with self._build_session(options) as session:
-            reqs_to_uninstall = {}
-            for name in args:
-                req = install_req_from_line(
-                    name, isolated=options.isolated_mode,
-                )
-                if req.name:
-                    reqs_to_uninstall[canonicalize_name(req.name)] = req
-            for filename in options.requirements:
-                for req in parse_requirements(
-                        filename,
-                        options=options,
-                        session=session):
-                    if req.name:
-                        reqs_to_uninstall[canonicalize_name(req.name)] = req
-            if not reqs_to_uninstall:
-                raise InstallationError(
-                    'You must give at least one requirement to %(name)s (see '
-                    '"pip help %(name)s")' % dict(name=self.name)
-                )
-
-            protect_pip_from_modification_on_windows(
-                modifying_pip="pip" in reqs_to_uninstall
-            )
-
-            for req in reqs_to_uninstall.values():
-                uninstall_pathset = req.uninstall(
-                    auto_confirm=options.yes, verbose=self.verbosity > 0,
-                )
-                if uninstall_pathset:
-                    uninstall_pathset.commit()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/wheel.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/wheel.py
deleted file mode 100644
index cd72a3d..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/commands/wheel.py
+++ /dev/null
@@ -1,186 +0,0 @@
-# -*- coding: utf-8 -*-
-from __future__ import absolute_import
-
-import logging
-import os
-
-from pip._internal.cache import WheelCache
-from pip._internal.cli import cmdoptions
-from pip._internal.cli.base_command import RequirementCommand
-from pip._internal.exceptions import CommandError, PreviousBuildDirError
-from pip._internal.operations.prepare import RequirementPreparer
-from pip._internal.req import RequirementSet
-from pip._internal.req.req_tracker import RequirementTracker
-from pip._internal.resolve import Resolver
-from pip._internal.utils.temp_dir import TempDirectory
-from pip._internal.wheel import WheelBuilder
-
-logger = logging.getLogger(__name__)
-
-
-class WheelCommand(RequirementCommand):
-    """
-    Build Wheel archives for your requirements and dependencies.
-
-    Wheel is a built-package format, and offers the advantage of not
-    recompiling your software during every install. For more details, see the
-    wheel docs: https://wheel.readthedocs.io/en/latest/
-
-    Requirements: setuptools>=0.8, and wheel.
-
-    'pip wheel' uses the bdist_wheel setuptools extension from the wheel
-    package to build individual wheels.
-
-    """
-
-    name = 'wheel'
-    usage = """
-      %prog [options] <requirement specifier> ...
-      %prog [options] -r <requirements file> ...
-      %prog [options] [-e] <vcs project url> ...
-      %prog [options] [-e] <local project path> ...
-      %prog [options] <archive url/path> ..."""
-
-    summary = 'Build wheels from your requirements.'
-
-    def __init__(self, *args, **kw):
-        super(WheelCommand, self).__init__(*args, **kw)
-
-        cmd_opts = self.cmd_opts
-
-        cmd_opts.add_option(
-            '-w', '--wheel-dir',
-            dest='wheel_dir',
-            metavar='dir',
-            default=os.curdir,
-            help=("Build wheels into <dir>, where the default is the "
-                  "current working directory."),
-        )
-        cmd_opts.add_option(cmdoptions.no_binary())
-        cmd_opts.add_option(cmdoptions.only_binary())
-        cmd_opts.add_option(cmdoptions.prefer_binary())
-        cmd_opts.add_option(
-            '--build-option',
-            dest='build_options',
-            metavar='options',
-            action='append',
-            help="Extra arguments to be supplied to 'setup.py bdist_wheel'.",
-        )
-        cmd_opts.add_option(cmdoptions.no_build_isolation())
-        cmd_opts.add_option(cmdoptions.use_pep517())
-        cmd_opts.add_option(cmdoptions.no_use_pep517())
-        cmd_opts.add_option(cmdoptions.constraints())
-        cmd_opts.add_option(cmdoptions.editable())
-        cmd_opts.add_option(cmdoptions.requirements())
-        cmd_opts.add_option(cmdoptions.src())
-        cmd_opts.add_option(cmdoptions.ignore_requires_python())
-        cmd_opts.add_option(cmdoptions.no_deps())
-        cmd_opts.add_option(cmdoptions.build_dir())
-        cmd_opts.add_option(cmdoptions.progress_bar())
-
-        cmd_opts.add_option(
-            '--global-option',
-            dest='global_options',
-            action='append',
-            metavar='options',
-            help="Extra global options to be supplied to the setup.py "
-            "call before the 'bdist_wheel' command.")
-
-        cmd_opts.add_option(
-            '--pre',
-            action='store_true',
-            default=False,
-            help=("Include pre-release and development versions. By default, "
-                  "pip only finds stable versions."),
-        )
-
-        cmd_opts.add_option(cmdoptions.no_clean())
-        cmd_opts.add_option(cmdoptions.require_hashes())
-
-        index_opts = cmdoptions.make_option_group(
-            cmdoptions.index_group,
-            self.parser,
-        )
-
-        self.parser.insert_option_group(0, index_opts)
-        self.parser.insert_option_group(0, cmd_opts)
-
-    def run(self, options, args):
-        cmdoptions.check_install_build_global(options)
-
-        index_urls = [options.index_url] + options.extra_index_urls
-        if options.no_index:
-            logger.debug('Ignoring indexes: %s', ','.join(index_urls))
-            index_urls = []
-
-        if options.build_dir:
-            options.build_dir = os.path.abspath(options.build_dir)
-
-        options.src_dir = os.path.abspath(options.src_dir)
-
-        with self._build_session(options) as session:
-            finder = self._build_package_finder(options, session)
-            build_delete = (not (options.no_clean or options.build_dir))
-            wheel_cache = WheelCache(options.cache_dir, options.format_control)
-
-            with RequirementTracker() as req_tracker, TempDirectory(
-                options.build_dir, delete=build_delete, kind="wheel"
-            ) as directory:
-
-                requirement_set = RequirementSet(
-                    require_hashes=options.require_hashes,
-                )
-
-                try:
-                    self.populate_requirement_set(
-                        requirement_set, args, options, finder, session,
-                        self.name, wheel_cache
-                    )
-
-                    preparer = RequirementPreparer(
-                        build_dir=directory.path,
-                        src_dir=options.src_dir,
-                        download_dir=None,
-                        wheel_download_dir=options.wheel_dir,
-                        progress_bar=options.progress_bar,
-                        build_isolation=options.build_isolation,
-                        req_tracker=req_tracker,
-                    )
-
-                    resolver = Resolver(
-                        preparer=preparer,
-                        finder=finder,
-                        session=session,
-                        wheel_cache=wheel_cache,
-                        use_user_site=False,
-                        upgrade_strategy="to-satisfy-only",
-                        force_reinstall=False,
-                        ignore_dependencies=options.ignore_dependencies,
-                        ignore_requires_python=options.ignore_requires_python,
-                        ignore_installed=True,
-                        isolated=options.isolated_mode,
-                        use_pep517=options.use_pep517
-                    )
-                    resolver.resolve(requirement_set)
-
-                    # build wheels
-                    wb = WheelBuilder(
-                        finder, preparer, wheel_cache,
-                        build_options=options.build_options or [],
-                        global_options=options.global_options or [],
-                        no_clean=options.no_clean,
-                    )
-                    build_failures = wb.build(
-                        requirement_set.requirements.values(), session=session,
-                    )
-                    if len(build_failures) != 0:
-                        raise CommandError(
-                            "Failed to build one or more wheels"
-                        )
-                except PreviousBuildDirError:
-                    options.no_clean = True
-                    raise
-                finally:
-                    if not options.no_clean:
-                        requirement_set.cleanup_files()
-                        wheel_cache.cleanup()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/configuration.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/configuration.py
deleted file mode 100644
index fe6df9b..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/configuration.py
+++ /dev/null
@@ -1,387 +0,0 @@
-"""Configuration management setup
-
-Some terminology:
-- name
-  As written in config files.
-- value
-  Value associated with a name
-- key
-  Name combined with it's section (section.name)
-- variant
-  A single word describing where the configuration key-value pair came from
-"""
-
-import locale
-import logging
-import os
-
-from pip._vendor import six
-from pip._vendor.six.moves import configparser
-
-from pip._internal.exceptions import (
-    ConfigurationError, ConfigurationFileCouldNotBeLoaded,
-)
-from pip._internal.locations import (
-    legacy_config_file, new_config_file, running_under_virtualenv,
-    site_config_files, venv_config_file,
-)
-from pip._internal.utils.misc import ensure_dir, enum
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if MYPY_CHECK_RUNNING:
-    from typing import (  # noqa: F401
-        Any, Dict, Iterable, List, NewType, Optional, Tuple
-    )
-
-    RawConfigParser = configparser.RawConfigParser  # Shorthand
-    Kind = NewType("Kind", str)
-
-logger = logging.getLogger(__name__)
-
-
-# NOTE: Maybe use the optionx attribute to normalize keynames.
-def _normalize_name(name):
-    # type: (str) -> str
-    """Make a name consistent regardless of source (environment or file)
-    """
-    name = name.lower().replace('_', '-')
-    if name.startswith('--'):
-        name = name[2:]  # only prefer long opts
-    return name
-
-
-def _disassemble_key(name):
-    # type: (str) -> List[str]
-    return name.split(".", 1)
-
-
-# The kinds of configurations there are.
-kinds = enum(
-    USER="user",        # User Specific
-    GLOBAL="global",    # System Wide
-    VENV="venv",        # Virtual Environment Specific
-    ENV="env",          # from PIP_CONFIG_FILE
-    ENV_VAR="env-var",  # from Environment Variables
-)
-
-
-class Configuration(object):
-    """Handles management of configuration.
-
-    Provides an interface to accessing and managing configuration files.
-
-    This class converts provides an API that takes "section.key-name" style
-    keys and stores the value associated with it as "key-name" under the
-    section "section".
-
-    This allows for a clean interface wherein the both the section and the
-    key-name are preserved in an easy to manage form in the configuration files
-    and the data stored is also nice.
-    """
-
-    def __init__(self, isolated, load_only=None):
-        # type: (bool, Kind) -> None
-        super(Configuration, self).__init__()
-
-        _valid_load_only = [kinds.USER, kinds.GLOBAL, kinds.VENV, None]
-        if load_only not in _valid_load_only:
-            raise ConfigurationError(
-                "Got invalid value for load_only - should be one of {}".format(
-                    ", ".join(map(repr, _valid_load_only[:-1]))
-                )
-            )
-        self.isolated = isolated  # type: bool
-        self.load_only = load_only  # type: Optional[Kind]
-
-        # The order here determines the override order.
-        self._override_order = [
-            kinds.GLOBAL, kinds.USER, kinds.VENV, kinds.ENV, kinds.ENV_VAR
-        ]
-
-        self._ignore_env_names = ["version", "help"]
-
-        # Because we keep track of where we got the data from
-        self._parsers = {
-            variant: [] for variant in self._override_order
-        }  # type: Dict[Kind, List[Tuple[str, RawConfigParser]]]
-        self._config = {
-            variant: {} for variant in self._override_order
-        }  # type: Dict[Kind, Dict[str, Any]]
-        self._modified_parsers = []  # type: List[Tuple[str, RawConfigParser]]
-
-    def load(self):
-        # type: () -> None
-        """Loads configuration from configuration files and environment
-        """
-        self._load_config_files()
-        if not self.isolated:
-            self._load_environment_vars()
-
-    def get_file_to_edit(self):
-        # type: () -> Optional[str]
-        """Returns the file with highest priority in configuration
-        """
-        assert self.load_only is not None, \
-            "Need to be specified a file to be editing"
-
-        try:
-            return self._get_parser_to_modify()[0]
-        except IndexError:
-            return None
-
-    def items(self):
-        # type: () -> Iterable[Tuple[str, Any]]
-        """Returns key-value pairs like dict.items() representing the loaded
-        configuration
-        """
-        return self._dictionary.items()
-
-    def get_value(self, key):
-        # type: (str) -> Any
-        """Get a value from the configuration.
-        """
-        try:
-            return self._dictionary[key]
-        except KeyError:
-            raise ConfigurationError("No such key - {}".format(key))
-
-    def set_value(self, key, value):
-        # type: (str, Any) -> None
-        """Modify a value in the configuration.
-        """
-        self._ensure_have_load_only()
-
-        fname, parser = self._get_parser_to_modify()
-
-        if parser is not None:
-            section, name = _disassemble_key(key)
-
-            # Modify the parser and the configuration
-            if not parser.has_section(section):
-                parser.add_section(section)
-            parser.set(section, name, value)
-
-        self._config[self.load_only][key] = value
-        self._mark_as_modified(fname, parser)
-
-    def unset_value(self, key):
-        # type: (str) -> None
-        """Unset a value in the configuration.
-        """
-        self._ensure_have_load_only()
-
-        if key not in self._config[self.load_only]:
-            raise ConfigurationError("No such key - {}".format(key))
-
-        fname, parser = self._get_parser_to_modify()
-
-        if parser is not None:
-            section, name = _disassemble_key(key)
-
-            # Remove the key in the parser
-            modified_something = False
-            if parser.has_section(section):
-                # Returns whether the option was removed or not
-                modified_something = parser.remove_option(section, name)
-
-            if modified_something:
-                # name removed from parser, section may now be empty
-                section_iter = iter(parser.items(section))
-                try:
-                    val = six.next(section_iter)
-                except StopIteration:
-                    val = None
-
-                if val is None:
-                    parser.remove_section(section)
-
-                self._mark_as_modified(fname, parser)
-            else:
-                raise ConfigurationError(
-                    "Fatal Internal error [id=1]. Please report as a bug."
-                )
-
-        del self._config[self.load_only][key]
-
-    def save(self):
-        # type: () -> None
-        """Save the currentin-memory state.
-        """
-        self._ensure_have_load_only()
-
-        for fname, parser in self._modified_parsers:
-            logger.info("Writing to %s", fname)
-
-            # Ensure directory exists.
-            ensure_dir(os.path.dirname(fname))
-
-            with open(fname, "w") as f:
-                parser.write(f)  # type: ignore
-
-    #
-    # Private routines
-    #
-
-    def _ensure_have_load_only(self):
-        # type: () -> None
-        if self.load_only is None:
-            raise ConfigurationError("Needed a specific file to be modifying.")
-        logger.debug("Will be working with %s variant only", self.load_only)
-
-    @property
-    def _dictionary(self):
-        # type: () -> Dict[str, Any]
-        """A dictionary representing the loaded configuration.
-        """
-        # NOTE: Dictionaries are not populated if not loaded. So, conditionals
-        #       are not needed here.
-        retval = {}
-
-        for variant in self._override_order:
-            retval.update(self._config[variant])
-
-        return retval
-
-    def _load_config_files(self):
-        # type: () -> None
-        """Loads configuration from configuration files
-        """
-        config_files = dict(self._iter_config_files())
-        if config_files[kinds.ENV][0:1] == [os.devnull]:
-            logger.debug(
-                "Skipping loading configuration files due to "
-                "environment's PIP_CONFIG_FILE being os.devnull"
-            )
-            return
-
-        for variant, files in config_files.items():
-            for fname in files:
-                # If there's specific variant set in `load_only`, load only
-                # that variant, not the others.
-                if self.load_only is not None and variant != self.load_only:
-                    logger.debug(
-                        "Skipping file '%s' (variant: %s)", fname, variant
-                    )
-                    continue
-
-                parser = self._load_file(variant, fname)
-
-                # Keeping track of the parsers used
-                self._parsers[variant].append((fname, parser))
-
-    def _load_file(self, variant, fname):
-        # type: (Kind, str) -> RawConfigParser
-        logger.debug("For variant '%s', will try loading '%s'", variant, fname)
-        parser = self._construct_parser(fname)
-
-        for section in parser.sections():
-            items = parser.items(section)
-            self._config[variant].update(self._normalized_keys(section, items))
-
-        return parser
-
-    def _construct_parser(self, fname):
-        # type: (str) -> RawConfigParser
-        parser = configparser.RawConfigParser()
-        # If there is no such file, don't bother reading it but create the
-        # parser anyway, to hold the data.
-        # Doing this is useful when modifying and saving files, where we don't
-        # need to construct a parser.
-        if os.path.exists(fname):
-            try:
-                parser.read(fname)
-            except UnicodeDecodeError:
-                # See https://github.com/pypa/pip/issues/4963
-                raise ConfigurationFileCouldNotBeLoaded(
-                    reason="contains invalid {} characters".format(
-                        locale.getpreferredencoding(False)
-                    ),
-                    fname=fname,
-                )
-            except configparser.Error as error:
-                # See https://github.com/pypa/pip/issues/4893
-                raise ConfigurationFileCouldNotBeLoaded(error=error)
-        return parser
-
-    def _load_environment_vars(self):
-        # type: () -> None
-        """Loads configuration from environment variables
-        """
-        self._config[kinds.ENV_VAR].update(
-            self._normalized_keys(":env:", self._get_environ_vars())
-        )
-
-    def _normalized_keys(self, section, items):
-        # type: (str, Iterable[Tuple[str, Any]]) -> Dict[str, Any]
-        """Normalizes items to construct a dictionary with normalized keys.
-
-        This routine is where the names become keys and are made the same
-        regardless of source - configuration files or environment.
-        """
-        normalized = {}
-        for name, val in items:
-            key = section + "." + _normalize_name(name)
-            normalized[key] = val
-        return normalized
-
-    def _get_environ_vars(self):
-        # type: () -> Iterable[Tuple[str, str]]
-        """Returns a generator with all environmental vars with prefix PIP_"""
-        for key, val in os.environ.items():
-            should_be_yielded = (
-                key.startswith("PIP_") and
-                key[4:].lower() not in self._ignore_env_names
-            )
-            if should_be_yielded:
-                yield key[4:].lower(), val
-
-    # XXX: This is patched in the tests.
-    def _iter_config_files(self):
-        # type: () -> Iterable[Tuple[Kind, List[str]]]
-        """Yields variant and configuration files associated with it.
-
-        This should be treated like items of a dictionary.
-        """
-        # SMELL: Move the conditions out of this function
-
-        # environment variables have the lowest priority
-        config_file = os.environ.get('PIP_CONFIG_FILE', None)
-        if config_file is not None:
-            yield kinds.ENV, [config_file]
-        else:
-            yield kinds.ENV, []
-
-        # at the base we have any global configuration
-        yield kinds.GLOBAL, list(site_config_files)
-
-        # per-user configuration next
-        should_load_user_config = not self.isolated and not (
-            config_file and os.path.exists(config_file)
-        )
-        if should_load_user_config:
-            # The legacy config file is overridden by the new config file
-            yield kinds.USER, [legacy_config_file, new_config_file]
-
-        # finally virtualenv configuration first trumping others
-        if running_under_virtualenv():
-            yield kinds.VENV, [venv_config_file]
-
-    def _get_parser_to_modify(self):
-        # type: () -> Tuple[str, RawConfigParser]
-        # Determine which parser to modify
-        parsers = self._parsers[self.load_only]
-        if not parsers:
-            # This should not happen if everything works correctly.
-            raise ConfigurationError(
-                "Fatal Internal error [id=2]. Please report as a bug."
-            )
-
-        # Use the highest priority parser.
-        return parsers[-1]
-
-    # XXX: This is patched in the tests.
-    def _mark_as_modified(self, fname, parser):
-        # type: (str, RawConfigParser) -> None
-        file_parser_tuple = (fname, parser)
-        if file_parser_tuple not in self._modified_parsers:
-            self._modified_parsers.append(file_parser_tuple)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/download.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/download.py
deleted file mode 100644
index 2bbe176..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/download.py
+++ /dev/null
@@ -1,971 +0,0 @@
-from __future__ import absolute_import
-
-import cgi
-import email.utils
-import getpass
-import json
-import logging
-import mimetypes
-import os
-import platform
-import re
-import shutil
-import sys
-
-from pip._vendor import requests, six, urllib3
-from pip._vendor.cachecontrol import CacheControlAdapter
-from pip._vendor.cachecontrol.caches import FileCache
-from pip._vendor.lockfile import LockError
-from pip._vendor.requests.adapters import BaseAdapter, HTTPAdapter
-from pip._vendor.requests.auth import AuthBase, HTTPBasicAuth
-from pip._vendor.requests.models import CONTENT_CHUNK_SIZE, Response
-from pip._vendor.requests.structures import CaseInsensitiveDict
-from pip._vendor.requests.utils import get_netrc_auth
-# NOTE: XMLRPC Client is not annotated in typeshed as on 2017-07-17, which is
-#       why we ignore the type on this import
-from pip._vendor.six.moves import xmlrpc_client  # type: ignore
-from pip._vendor.six.moves.urllib import parse as urllib_parse
-from pip._vendor.six.moves.urllib import request as urllib_request
-from pip._vendor.urllib3.util import IS_PYOPENSSL
-
-import pip
-from pip._internal.exceptions import HashMismatch, InstallationError
-from pip._internal.locations import write_delete_marker_file
-from pip._internal.models.index import PyPI
-from pip._internal.utils.encoding import auto_decode
-from pip._internal.utils.filesystem import check_path_owner
-from pip._internal.utils.glibc import libc_ver
-from pip._internal.utils.logging import indent_log
-from pip._internal.utils.misc import (
-    ARCHIVE_EXTENSIONS, ask_path_exists, backup_dir, call_subprocess, consume,
-    display_path, format_size, get_installed_version, rmtree,
-    split_auth_from_netloc, splitext, unpack_file,
-)
-from pip._internal.utils.setuptools_build import SETUPTOOLS_SHIM
-from pip._internal.utils.temp_dir import TempDirectory
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-from pip._internal.utils.ui import DownloadProgressProvider
-from pip._internal.vcs import vcs
-
-if MYPY_CHECK_RUNNING:
-    from typing import (  # noqa: F401
-        Optional, Tuple, Dict, IO, Text, Union
-    )
-    from pip._internal.models.link import Link  # noqa: F401
-    from pip._internal.utils.hashes import Hashes  # noqa: F401
-    from pip._internal.vcs import AuthInfo  # noqa: F401
-
-try:
-    import ssl  # noqa
-except ImportError:
-    ssl = None
-
-HAS_TLS = (ssl is not None) or IS_PYOPENSSL
-
-__all__ = ['get_file_content',
-           'is_url', 'url_to_path', 'path_to_url',
-           'is_archive_file', 'unpack_vcs_link',
-           'unpack_file_url', 'is_vcs_url', 'is_file_url',
-           'unpack_http_url', 'unpack_url']
-
-
-logger = logging.getLogger(__name__)
-
-
-def user_agent():
-    """
-    Return a string representing the user agent.
-    """
-    data = {
-        "installer": {"name": "pip", "version": pip.__version__},
-        "python": platform.python_version(),
-        "implementation": {
-            "name": platform.python_implementation(),
-        },
-    }
-
-    if data["implementation"]["name"] == 'CPython':
-        data["implementation"]["version"] = platform.python_version()
-    elif data["implementation"]["name"] == 'PyPy':
-        if sys.pypy_version_info.releaselevel == 'final':
-            pypy_version_info = sys.pypy_version_info[:3]
-        else:
-            pypy_version_info = sys.pypy_version_info
-        data["implementation"]["version"] = ".".join(
-            [str(x) for x in pypy_version_info]
-        )
-    elif data["implementation"]["name"] == 'Jython':
-        # Complete Guess
-        data["implementation"]["version"] = platform.python_version()
-    elif data["implementation"]["name"] == 'IronPython':
-        # Complete Guess
-        data["implementation"]["version"] = platform.python_version()
-
-    if sys.platform.startswith("linux"):
-        from pip._vendor import distro
-        distro_infos = dict(filter(
-            lambda x: x[1],
-            zip(["name", "version", "id"], distro.linux_distribution()),
-        ))
-        libc = dict(filter(
-            lambda x: x[1],
-            zip(["lib", "version"], libc_ver()),
-        ))
-        if libc:
-            distro_infos["libc"] = libc
-        if distro_infos:
-            data["distro"] = distro_infos
-
-    if sys.platform.startswith("darwin") and platform.mac_ver()[0]:
-        data["distro"] = {"name": "macOS", "version": platform.mac_ver()[0]}
-
-    if platform.system():
-        data.setdefault("system", {})["name"] = platform.system()
-
-    if platform.release():
-        data.setdefault("system", {})["release"] = platform.release()
-
-    if platform.machine():
-        data["cpu"] = platform.machine()
-
-    if HAS_TLS:
-        data["openssl_version"] = ssl.OPENSSL_VERSION
-
-    setuptools_version = get_installed_version("setuptools")
-    if setuptools_version is not None:
-        data["setuptools_version"] = setuptools_version
-
-    return "{data[installer][name]}/{data[installer][version]} {json}".format(
-        data=data,
-        json=json.dumps(data, separators=(",", ":"), sort_keys=True),
-    )
-
-
-class MultiDomainBasicAuth(AuthBase):
-
-    def __init__(self, prompting=True):
-        # type: (bool) -> None
-        self.prompting = prompting
-        self.passwords = {}  # type: Dict[str, AuthInfo]
-
-    def __call__(self, req):
-        parsed = urllib_parse.urlparse(req.url)
-
-        # Split the credentials from the netloc.
-        netloc, url_user_password = split_auth_from_netloc(parsed.netloc)
-
-        # Set the url of the request to the url without any credentials
-        req.url = urllib_parse.urlunparse(parsed[:1] + (netloc,) + parsed[2:])
-
-        # Use any stored credentials that we have for this netloc
-        username, password = self.passwords.get(netloc, (None, None))
-
-        # Use the credentials embedded in the url if we have none stored
-        if username is None:
-            username, password = url_user_password
-
-        # Get creds from netrc if we still don't have them
-        if username is None and password is None:
-            netrc_auth = get_netrc_auth(req.url)
-            username, password = netrc_auth if netrc_auth else (None, None)
-
-        if username or password:
-            # Store the username and password
-            self.passwords[netloc] = (username, password)
-
-            # Send the basic auth with this request
-            req = HTTPBasicAuth(username or "", password or "")(req)
-
-        # Attach a hook to handle 401 responses
-        req.register_hook("response", self.handle_401)
-
-        return req
-
-    def handle_401(self, resp, **kwargs):
-        # We only care about 401 responses, anything else we want to just
-        #   pass through the actual response
-        if resp.status_code != 401:
-            return resp
-
-        # We are not able to prompt the user so simply return the response
-        if not self.prompting:
-            return resp
-
-        parsed = urllib_parse.urlparse(resp.url)
-
-        # Prompt the user for a new username and password
-        username = six.moves.input("User for %s: " % parsed.netloc)
-        password = getpass.getpass("Password: ")
-
-        # Store the new username and password to use for future requests
-        if username or password:
-            self.passwords[parsed.netloc] = (username, password)
-
-        # Consume content and release the original connection to allow our new
-        #   request to reuse the same one.
-        resp.content
-        resp.raw.release_conn()
-
-        # Add our new username and password to the request
-        req = HTTPBasicAuth(username or "", password or "")(resp.request)
-        req.register_hook("response", self.warn_on_401)
-
-        # Send our new request
-        new_resp = resp.connection.send(req, **kwargs)
-        new_resp.history.append(resp)
-
-        return new_resp
-
-    def warn_on_401(self, resp, **kwargs):
-        # warn user that they provided incorrect credentials
-        if resp.status_code == 401:
-            logger.warning('401 Error, Credentials not correct for %s',
-                           resp.request.url)
-
-
-class LocalFSAdapter(BaseAdapter):
-
-    def send(self, request, stream=None, timeout=None, verify=None, cert=None,
-             proxies=None):
-        pathname = url_to_path(request.url)
-
-        resp = Response()
-        resp.status_code = 200
-        resp.url = request.url
-
-        try:
-            stats = os.stat(pathname)
-        except OSError as exc:
-            resp.status_code = 404
-            resp.raw = exc
-        else:
-            modified = email.utils.formatdate(stats.st_mtime, usegmt=True)
-            content_type = mimetypes.guess_type(pathname)[0] or "text/plain"
-            resp.headers = CaseInsensitiveDict({
-                "Content-Type": content_type,
-                "Content-Length": stats.st_size,
-                "Last-Modified": modified,
-            })
-
-            resp.raw = open(pathname, "rb")
-            resp.close = resp.raw.close
-
-        return resp
-
-    def close(self):
-        pass
-
-
-class SafeFileCache(FileCache):
-    """
-    A file based cache which is safe to use even when the target directory may
-    not be accessible or writable.
-    """
-
-    def __init__(self, *args, **kwargs):
-        super(SafeFileCache, self).__init__(*args, **kwargs)
-
-        # Check to ensure that the directory containing our cache directory
-        # is owned by the user current executing pip. If it does not exist
-        # we will check the parent directory until we find one that does exist.
-        # If it is not owned by the user executing pip then we will disable
-        # the cache and log a warning.
-        if not check_path_owner(self.directory):
-            logger.warning(
-                "The directory '%s' or its parent directory is not owned by "
-                "the current user and the cache has been disabled. Please "
-                "check the permissions and owner of that directory. If "
-                "executing pip with sudo, you may want sudo's -H flag.",
-                self.directory,
-            )
-
-            # Set our directory to None to disable the Cache
-            self.directory = None
-
-    def get(self, *args, **kwargs):
-        # If we don't have a directory, then the cache should be a no-op.
-        if self.directory is None:
-            return
-
-        try:
-            return super(SafeFileCache, self).get(*args, **kwargs)
-        except (LockError, OSError, IOError):
-            # We intentionally silence this error, if we can't access the cache
-            # then we can just skip caching and process the request as if
-            # caching wasn't enabled.
-            pass
-
-    def set(self, *args, **kwargs):
-        # If we don't have a directory, then the cache should be a no-op.
-        if self.directory is None:
-            return
-
-        try:
-            return super(SafeFileCache, self).set(*args, **kwargs)
-        except (LockError, OSError, IOError):
-            # We intentionally silence this error, if we can't access the cache
-            # then we can just skip caching and process the request as if
-            # caching wasn't enabled.
-            pass
-
-    def delete(self, *args, **kwargs):
-        # If we don't have a directory, then the cache should be a no-op.
-        if self.directory is None:
-            return
-
-        try:
-            return super(SafeFileCache, self).delete(*args, **kwargs)
-        except (LockError, OSError, IOError):
-            # We intentionally silence this error, if we can't access the cache
-            # then we can just skip caching and process the request as if
-            # caching wasn't enabled.
-            pass
-
-
-class InsecureHTTPAdapter(HTTPAdapter):
-
-    def cert_verify(self, conn, url, verify, cert):
-        conn.cert_reqs = 'CERT_NONE'
-        conn.ca_certs = None
-
-
-class PipSession(requests.Session):
-
-    timeout = None  # type: Optional[int]
-
-    def __init__(self, *args, **kwargs):
-        retries = kwargs.pop("retries", 0)
-        cache = kwargs.pop("cache", None)
-        insecure_hosts = kwargs.pop("insecure_hosts", [])
-
-        super(PipSession, self).__init__(*args, **kwargs)
-
-        # Attach our User Agent to the request
-        self.headers["User-Agent"] = user_agent()
-
-        # Attach our Authentication handler to the session
-        self.auth = MultiDomainBasicAuth()
-
-        # Create our urllib3.Retry instance which will allow us to customize
-        # how we handle retries.
-        retries = urllib3.Retry(
-            # Set the total number of retries that a particular request can
-            # have.
-            total=retries,
-
-            # A 503 error from PyPI typically means that the Fastly -> Origin
-            # connection got interrupted in some way. A 503 error in general
-            # is typically considered a transient error so we'll go ahead and
-            # retry it.
-            # A 500 may indicate transient error in Amazon S3
-            # A 520 or 527 - may indicate transient error in CloudFlare
-            status_forcelist=[500, 503, 520, 527],
-
-            # Add a small amount of back off between failed requests in
-            # order to prevent hammering the service.
-            backoff_factor=0.25,
-        )
-
-        # We want to _only_ cache responses on securely fetched origins. We do
-        # this because we can't validate the response of an insecurely fetched
-        # origin, and we don't want someone to be able to poison the cache and
-        # require manual eviction from the cache to fix it.
-        if cache:
-            secure_adapter = CacheControlAdapter(
-                cache=SafeFileCache(cache, use_dir_lock=True),
-                max_retries=retries,
-            )
-        else:
-            secure_adapter = HTTPAdapter(max_retries=retries)
-
-        # Our Insecure HTTPAdapter disables HTTPS validation. It does not
-        # support caching (see above) so we'll use it for all http:// URLs as
-        # well as any https:// host that we've marked as ignoring TLS errors
-        # for.
-        insecure_adapter = InsecureHTTPAdapter(max_retries=retries)
-
-        self.mount("https://", secure_adapter)
-        self.mount("http://", insecure_adapter)
-
-        # Enable file:// urls
-        self.mount("file://", LocalFSAdapter())
-
-        # We want to use a non-validating adapter for any requests which are
-        # deemed insecure.
-        for host in insecure_hosts:
-            self.mount("https://{}/".format(host), insecure_adapter)
-
-    def request(self, method, url, *args, **kwargs):
-        # Allow setting a default timeout on a session
-        kwargs.setdefault("timeout", self.timeout)
-
-        # Dispatch the actual request
-        return super(PipSession, self).request(method, url, *args, **kwargs)
-
-
-def get_file_content(url, comes_from=None, session=None):
-    # type: (str, Optional[str], Optional[PipSession]) -> Tuple[str, Text]
-    """Gets the content of a file; it may be a filename, file: URL, or
-    http: URL.  Returns (location, content).  Content is unicode.
-
-    :param url:         File path or url.
-    :param comes_from:  Origin description of requirements.
-    :param session:     Instance of pip.download.PipSession.
-    """
-    if session is None:
-        raise TypeError(
-            "get_file_content() missing 1 required keyword argument: 'session'"
-        )
-
-    match = _scheme_re.search(url)
-    if match:
-        scheme = match.group(1).lower()
-        if (scheme == 'file' and comes_from and
-                comes_from.startswith('http')):
-            raise InstallationError(
-                'Requirements file %s references URL %s, which is local'
-                % (comes_from, url))
-        if scheme == 'file':
-            path = url.split(':', 1)[1]
-            path = path.replace('\\', '/')
-            match = _url_slash_drive_re.match(path)
-            if match:
-                path = match.group(1) + ':' + path.split('|', 1)[1]
-            path = urllib_parse.unquote(path)
-            if path.startswith('/'):
-                path = '/' + path.lstrip('/')
-            url = path
-        else:
-            # FIXME: catch some errors
-            resp = session.get(url)
-            resp.raise_for_status()
-            return resp.url, resp.text
-    try:
-        with open(url, 'rb') as f:
-            content = auto_decode(f.read())
-    except IOError as exc:
-        raise InstallationError(
-            'Could not open requirements file: %s' % str(exc)
-        )
-    return url, content
-
-
-_scheme_re = re.compile(r'^(http|https|file):', re.I)
-_url_slash_drive_re = re.compile(r'/*([a-z])\|', re.I)
-
-
-def is_url(name):
-    # type: (Union[str, Text]) -> bool
-    """Returns true if the name looks like a URL"""
-    if ':' not in name:
-        return False
-    scheme = name.split(':', 1)[0].lower()
-    return scheme in ['http', 'https', 'file', 'ftp'] + vcs.all_schemes
-
-
-def url_to_path(url):
-    # type: (str) -> str
-    """
-    Convert a file: URL to a path.
-    """
-    assert url.startswith('file:'), (
-        "You can only turn file: urls into filenames (not %r)" % url)
-
-    _, netloc, path, _, _ = urllib_parse.urlsplit(url)
-
-    # if we have a UNC path, prepend UNC share notation
-    if netloc:
-        netloc = '\\\\' + netloc
-
-    path = urllib_request.url2pathname(netloc + path)
-    return path
-
-
-def path_to_url(path):
-    # type: (Union[str, Text]) -> str
-    """
-    Convert a path to a file: URL.  The path will be made absolute and have
-    quoted path parts.
-    """
-    path = os.path.normpath(os.path.abspath(path))
-    url = urllib_parse.urljoin('file:', urllib_request.pathname2url(path))
-    return url
-
-
-def is_archive_file(name):
-    # type: (str) -> bool
-    """Return True if `name` is a considered as an archive file."""
-    ext = splitext(name)[1].lower()
-    if ext in ARCHIVE_EXTENSIONS:
-        return True
-    return False
-
-
-def unpack_vcs_link(link, location):
-    vcs_backend = _get_used_vcs_backend(link)
-    vcs_backend.unpack(location)
-
-
-def _get_used_vcs_backend(link):
-    for backend in vcs.backends:
-        if link.scheme in backend.schemes:
-            vcs_backend = backend(link.url)
-            return vcs_backend
-
-
-def is_vcs_url(link):
-    # type: (Link) -> bool
-    return bool(_get_used_vcs_backend(link))
-
-
-def is_file_url(link):
-    # type: (Link) -> bool
-    return link.url.lower().startswith('file:')
-
-
-def is_dir_url(link):
-    # type: (Link) -> bool
-    """Return whether a file:// Link points to a directory.
-
-    ``link`` must not have any other scheme but file://. Call is_file_url()
-    first.
-
-    """
-    link_path = url_to_path(link.url_without_fragment)
-    return os.path.isdir(link_path)
-
-
-def _progress_indicator(iterable, *args, **kwargs):
-    return iterable
-
-
-def _download_url(
-    resp,  # type: Response
-    link,  # type: Link
-    content_file,  # type: IO
-    hashes,  # type: Hashes
-    progress_bar  # type: str
-):
-    # type: (...) -> None
-    try:
-        total_length = int(resp.headers['content-length'])
-    except (ValueError, KeyError, TypeError):
-        total_length = 0
-
-    cached_resp = getattr(resp, "from_cache", False)
-    if logger.getEffectiveLevel() > logging.INFO:
-        show_progress = False
-    elif cached_resp:
-        show_progress = False
-    elif total_length > (40 * 1000):
-        show_progress = True
-    elif not total_length:
-        show_progress = True
-    else:
-        show_progress = False
-
-    show_url = link.show_url
-
-    def resp_read(chunk_size):
-        try:
-            # Special case for urllib3.
-            for chunk in resp.raw.stream(
-                    chunk_size,
-                    # We use decode_content=False here because we don't
-                    # want urllib3 to mess with the raw bytes we get
-                    # from the server. If we decompress inside of
-                    # urllib3 then we cannot verify the checksum
-                    # because the checksum will be of the compressed
-                    # file. This breakage will only occur if the
-                    # server adds a Content-Encoding header, which
-                    # depends on how the server was configured:
-                    # - Some servers will notice that the file isn't a
-                    #   compressible file and will leave the file alone
-                    #   and with an empty Content-Encoding
-                    # - Some servers will notice that the file is
-                    #   already compressed and will leave the file
-                    #   alone and will add a Content-Encoding: gzip
-                    #   header
-                    # - Some servers won't notice anything at all and
-                    #   will take a file that's already been compressed
-                    #   and compress it again and set the
-                    #   Content-Encoding: gzip header
-                    #
-                    # By setting this not to decode automatically we
-                    # hope to eliminate problems with the second case.
-                    decode_content=False):
-                yield chunk
-        except AttributeError:
-            # Standard file-like object.
-            while True:
-                chunk = resp.raw.read(chunk_size)
-                if not chunk:
-                    break
-                yield chunk
-
-    def written_chunks(chunks):
-        for chunk in chunks:
-            content_file.write(chunk)
-            yield chunk
-
-    progress_indicator = _progress_indicator
-
-    if link.netloc == PyPI.netloc:
-        url = show_url
-    else:
-        url = link.url_without_fragment
-
-    if show_progress:  # We don't show progress on cached responses
-        progress_indicator = DownloadProgressProvider(progress_bar,
-                                                      max=total_length)
-        if total_length:
-            logger.info("Downloading %s (%s)", url, format_size(total_length))
-        else:
-            logger.info("Downloading %s", url)
-    elif cached_resp:
-        logger.info("Using cached %s", url)
-    else:
-        logger.info("Downloading %s", url)
-
-    logger.debug('Downloading from URL %s', link)
-
-    downloaded_chunks = written_chunks(
-        progress_indicator(
-            resp_read(CONTENT_CHUNK_SIZE),
-            CONTENT_CHUNK_SIZE
-        )
-    )
-    if hashes:
-        hashes.check_against_chunks(downloaded_chunks)
-    else:
-        consume(downloaded_chunks)
-
-
-def _copy_file(filename, location, link):
-    copy = True
-    download_location = os.path.join(location, link.filename)
-    if os.path.exists(download_location):
-        response = ask_path_exists(
-            'The file %s exists. (i)gnore, (w)ipe, (b)ackup, (a)abort' %
-            display_path(download_location), ('i', 'w', 'b', 'a'))
-        if response == 'i':
-            copy = False
-        elif response == 'w':
-            logger.warning('Deleting %s', display_path(download_location))
-            os.remove(download_location)
-        elif response == 'b':
-            dest_file = backup_dir(download_location)
-            logger.warning(
-                'Backing up %s to %s',
-                display_path(download_location),
-                display_path(dest_file),
-            )
-            shutil.move(download_location, dest_file)
-        elif response == 'a':
-            sys.exit(-1)
-    if copy:
-        shutil.copy(filename, download_location)
-        logger.info('Saved %s', display_path(download_location))
-
-
-def unpack_http_url(
-    link,  # type: Link
-    location,  # type: str
-    download_dir=None,  # type: Optional[str]
-    session=None,  # type: Optional[PipSession]
-    hashes=None,  # type: Optional[Hashes]
-    progress_bar="on"  # type: str
-):
-    # type: (...) -> None
-    if session is None:
-        raise TypeError(
-            "unpack_http_url() missing 1 required keyword argument: 'session'"
-        )
-
-    with TempDirectory(kind="unpack") as temp_dir:
-        # If a download dir is specified, is the file already downloaded there?
-        already_downloaded_path = None
-        if download_dir:
-            already_downloaded_path = _check_download_dir(link,
-                                                          download_dir,
-                                                          hashes)
-
-        if already_downloaded_path:
-            from_path = already_downloaded_path
-            content_type = mimetypes.guess_type(from_path)[0]
-        else:
-            # let's download to a tmp dir
-            from_path, content_type = _download_http_url(link,
-                                                         session,
-                                                         temp_dir.path,
-                                                         hashes,
-                                                         progress_bar)
-
-        # unpack the archive to the build dir location. even when only
-        # downloading archives, they have to be unpacked to parse dependencies
-        unpack_file(from_path, location, content_type, link)
-
-        # a download dir is specified; let's copy the archive there
-        if download_dir and not already_downloaded_path:
-            _copy_file(from_path, download_dir, link)
-
-        if not already_downloaded_path:
-            os.unlink(from_path)
-
-
-def unpack_file_url(
-    link,  # type: Link
-    location,  # type: str
-    download_dir=None,  # type: Optional[str]
-    hashes=None  # type: Optional[Hashes]
-):
-    # type: (...) -> None
-    """Unpack link into location.
-
-    If download_dir is provided and link points to a file, make a copy
-    of the link file inside download_dir.
-    """
-    link_path = url_to_path(link.url_without_fragment)
-
-    # If it's a url to a local directory
-    if is_dir_url(link):
-        if os.path.isdir(location):
-            rmtree(location)
-        shutil.copytree(link_path, location, symlinks=True)
-        if download_dir:
-            logger.info('Link is a directory, ignoring download_dir')
-        return
-
-    # If --require-hashes is off, `hashes` is either empty, the
-    # link's embedded hash, or MissingHashes; it is required to
-    # match. If --require-hashes is on, we are satisfied by any
-    # hash in `hashes` matching: a URL-based or an option-based
-    # one; no internet-sourced hash will be in `hashes`.
-    if hashes:
-        hashes.check_against_path(link_path)
-
-    # If a download dir is specified, is the file already there and valid?
-    already_downloaded_path = None
-    if download_dir:
-        already_downloaded_path = _check_download_dir(link,
-                                                      download_dir,
-                                                      hashes)
-
-    if already_downloaded_path:
-        from_path = already_downloaded_path
-    else:
-        from_path = link_path
-
-    content_type = mimetypes.guess_type(from_path)[0]
-
-    # unpack the archive to the build dir location. even when only downloading
-    # archives, they have to be unpacked to parse dependencies
-    unpack_file(from_path, location, content_type, link)
-
-    # a download dir is specified and not already downloaded
-    if download_dir and not already_downloaded_path:
-        _copy_file(from_path, download_dir, link)
-
-
-def _copy_dist_from_dir(link_path, location):
-    """Copy distribution files in `link_path` to `location`.
-
-    Invoked when user requests to install a local directory. E.g.:
-
-        pip install .
-        pip install ~/dev/git-repos/python-prompt-toolkit
-
-    """
-
-    # Note: This is currently VERY SLOW if you have a lot of data in the
-    # directory, because it copies everything with `shutil.copytree`.
-    # What it should really do is build an sdist and install that.
-    # See https://github.com/pypa/pip/issues/2195
-
-    if os.path.isdir(location):
-        rmtree(location)
-
-    # build an sdist
-    setup_py = 'setup.py'
-    sdist_args = [sys.executable]
-    sdist_args.append('-c')
-    sdist_args.append(SETUPTOOLS_SHIM % setup_py)
-    sdist_args.append('sdist')
-    sdist_args += ['--dist-dir', location]
-    logger.info('Running setup.py sdist for %s', link_path)
-
-    with indent_log():
-        call_subprocess(sdist_args, cwd=link_path, show_stdout=False)
-
-    # unpack sdist into `location`
-    sdist = os.path.join(location, os.listdir(location)[0])
-    logger.info('Unpacking sdist %s into %s', sdist, location)
-    unpack_file(sdist, location, content_type=None, link=None)
-
-
-class PipXmlrpcTransport(xmlrpc_client.Transport):
-    """Provide a `xmlrpclib.Transport` implementation via a `PipSession`
-    object.
-    """
-
-    def __init__(self, index_url, session, use_datetime=False):
-        xmlrpc_client.Transport.__init__(self, use_datetime)
-        index_parts = urllib_parse.urlparse(index_url)
-        self._scheme = index_parts.scheme
-        self._session = session
-
-    def request(self, host, handler, request_body, verbose=False):
-        parts = (self._scheme, host, handler, None, None, None)
-        url = urllib_parse.urlunparse(parts)
-        try:
-            headers = {'Content-Type': 'text/xml'}
-            response = self._session.post(url, data=request_body,
-                                          headers=headers, stream=True)
-            response.raise_for_status()
-            self.verbose = verbose
-            return self.parse_response(response.raw)
-        except requests.HTTPError as exc:
-            logger.critical(
-                "HTTP error %s while getting %s",
-                exc.response.status_code, url,
-            )
-            raise
-
-
-def unpack_url(
-    link,  # type: Optional[Link]
-    location,  # type: Optional[str]
-    download_dir=None,  # type: Optional[str]
-    only_download=False,  # type: bool
-    session=None,  # type: Optional[PipSession]
-    hashes=None,  # type: Optional[Hashes]
-    progress_bar="on"  # type: str
-):
-    # type: (...) -> None
-    """Unpack link.
-       If link is a VCS link:
-         if only_download, export into download_dir and ignore location
-          else unpack into location
-       for other types of link:
-         - unpack into location
-         - if download_dir, copy the file into download_dir
-         - if only_download, mark location for deletion
-
-    :param hashes: A Hashes object, one of whose embedded hashes must match,
-        or HashMismatch will be raised. If the Hashes is empty, no matches are
-        required, and unhashable types of requirements (like VCS ones, which
-        would ordinarily raise HashUnsupported) are allowed.
-    """
-    # non-editable vcs urls
-    if is_vcs_url(link):
-        unpack_vcs_link(link, location)
-
-    # file urls
-    elif is_file_url(link):
-        unpack_file_url(link, location, download_dir, hashes=hashes)
-
-    # http urls
-    else:
-        if session is None:
-            session = PipSession()
-
-        unpack_http_url(
-            link,
-            location,
-            download_dir,
-            session,
-            hashes=hashes,
-            progress_bar=progress_bar
-        )
-    if only_download:
-        write_delete_marker_file(location)
-
-
-def _download_http_url(
-    link,  # type: Link
-    session,  # type: PipSession
-    temp_dir,  # type: str
-    hashes,  # type: Hashes
-    progress_bar  # type: str
-):
-    # type: (...) -> Tuple[str, str]
-    """Download link url into temp_dir using provided session"""
-    target_url = link.url.split('#', 1)[0]
-    try:
-        resp = session.get(
-            target_url,
-            # We use Accept-Encoding: identity here because requests
-            # defaults to accepting compressed responses. This breaks in
-            # a variety of ways depending on how the server is configured.
-            # - Some servers will notice that the file isn't a compressible
-            #   file and will leave the file alone and with an empty
-            #   Content-Encoding
-            # - Some servers will notice that the file is already
-            #   compressed and will leave the file alone and will add a
-            #   Content-Encoding: gzip header
-            # - Some servers won't notice anything at all and will take
-            #   a file that's already been compressed and compress it again
-            #   and set the Content-Encoding: gzip header
-            # By setting this to request only the identity encoding We're
-            # hoping to eliminate the third case. Hopefully there does not
-            # exist a server which when given a file will notice it is
-            # already compressed and that you're not asking for a
-            # compressed file and will then decompress it before sending
-            # because if that's the case I don't think it'll ever be
-            # possible to make this work.
-            headers={"Accept-Encoding": "identity"},
-            stream=True,
-        )
-        resp.raise_for_status()
-    except requests.HTTPError as exc:
-        logger.critical(
-            "HTTP error %s while getting %s", exc.response.status_code, link,
-        )
-        raise
-
-    content_type = resp.headers.get('content-type', '')
-    filename = link.filename  # fallback
-    # Have a look at the Content-Disposition header for a better guess
-    content_disposition = resp.headers.get('content-disposition')
-    if content_disposition:
-        type, params = cgi.parse_header(content_disposition)
-        # We use ``or`` here because we don't want to use an "empty" value
-        # from the filename param.
-        filename = params.get('filename') or filename
-    ext = splitext(filename)[1]
-    if not ext:
-        ext = mimetypes.guess_extension(content_type)
-        if ext:
-            filename += ext
-    if not ext and link.url != resp.url:
-        ext = os.path.splitext(resp.url)[1]
-        if ext:
-            filename += ext
-    file_path = os.path.join(temp_dir, filename)
-    with open(file_path, 'wb') as content_file:
-        _download_url(resp, link, content_file, hashes, progress_bar)
-    return file_path, content_type
-
-
-def _check_download_dir(link, download_dir, hashes):
-    # type: (Link, str, Hashes) -> Optional[str]
-    """ Check download_dir for previously downloaded file with correct hash
-        If a correct file is found return its path else None
-    """
-    download_path = os.path.join(download_dir, link.filename)
-    if os.path.exists(download_path):
-        # If already downloaded, does its hash match?
-        logger.info('File was already downloaded %s', download_path)
-        if hashes:
-            try:
-                hashes.check_against_path(download_path)
-            except HashMismatch:
-                logger.warning(
-                    'Previously-downloaded file %s has bad hash. '
-                    'Re-downloading.',
-                    download_path
-                )
-                os.unlink(download_path)
-                return None
-        return download_path
-    return None
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/exceptions.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/exceptions.py
deleted file mode 100644
index 38ceeea..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/exceptions.py
+++ /dev/null
@@ -1,274 +0,0 @@
-"""Exceptions used throughout package"""
-from __future__ import absolute_import
-
-from itertools import chain, groupby, repeat
-
-from pip._vendor.six import iteritems
-
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if MYPY_CHECK_RUNNING:
-    from typing import Optional  # noqa: F401
-    from pip._internal.req.req_install import InstallRequirement  # noqa: F401
-
-
-class PipError(Exception):
-    """Base pip exception"""
-
-
-class ConfigurationError(PipError):
-    """General exception in configuration"""
-
-
-class InstallationError(PipError):
-    """General exception during installation"""
-
-
-class UninstallationError(PipError):
-    """General exception during uninstallation"""
-
-
-class DistributionNotFound(InstallationError):
-    """Raised when a distribution cannot be found to satisfy a requirement"""
-
-
-class RequirementsFileParseError(InstallationError):
-    """Raised when a general error occurs parsing a requirements file line."""
-
-
-class BestVersionAlreadyInstalled(PipError):
-    """Raised when the most up-to-date version of a package is already
-    installed."""
-
-
-class BadCommand(PipError):
-    """Raised when virtualenv or a command is not found"""
-
-
-class CommandError(PipError):
-    """Raised when there is an error in command-line arguments"""
-
-
-class PreviousBuildDirError(PipError):
-    """Raised when there's a previous conflicting build directory"""
-
-
-class InvalidWheelFilename(InstallationError):
-    """Invalid wheel filename."""
-
-
-class UnsupportedWheel(InstallationError):
-    """Unsupported wheel."""
-
-
-class HashErrors(InstallationError):
-    """Multiple HashError instances rolled into one for reporting"""
-
-    def __init__(self):
-        self.errors = []
-
-    def append(self, error):
-        self.errors.append(error)
-
-    def __str__(self):
-        lines = []
-        self.errors.sort(key=lambda e: e.order)
-        for cls, errors_of_cls in groupby(self.errors, lambda e: e.__class__):
-            lines.append(cls.head)
-            lines.extend(e.body() for e in errors_of_cls)
-        if lines:
-            return '\n'.join(lines)
-
-    def __nonzero__(self):
-        return bool(self.errors)
-
-    def __bool__(self):
-        return self.__nonzero__()
-
-
-class HashError(InstallationError):
-    """
-    A failure to verify a package against known-good hashes
-
-    :cvar order: An int sorting hash exception classes by difficulty of
-        recovery (lower being harder), so the user doesn't bother fretting
-        about unpinned packages when he has deeper issues, like VCS
-        dependencies, to deal with. Also keeps error reports in a
-        deterministic order.
-    :cvar head: A section heading for display above potentially many
-        exceptions of this kind
-    :ivar req: The InstallRequirement that triggered this error. This is
-        pasted on after the exception is instantiated, because it's not
-        typically available earlier.
-
-    """
-    req = None  # type: Optional[InstallRequirement]
-    head = ''
-
-    def body(self):
-        """Return a summary of me for display under the heading.
-
-        This default implementation simply prints a description of the
-        triggering requirement.
-
-        :param req: The InstallRequirement that provoked this error, with
-            populate_link() having already been called
-
-        """
-        return '    %s' % self._requirement_name()
-
-    def __str__(self):
-        return '%s\n%s' % (self.head, self.body())
-
-    def _requirement_name(self):
-        """Return a description of the requirement that triggered me.
-
-        This default implementation returns long description of the req, with
-        line numbers
-
-        """
-        return str(self.req) if self.req else 'unknown package'
-
-
-class VcsHashUnsupported(HashError):
-    """A hash was provided for a version-control-system-based requirement, but
-    we don't have a method for hashing those."""
-
-    order = 0
-    head = ("Can't verify hashes for these requirements because we don't "
-            "have a way to hash version control repositories:")
-
-
-class DirectoryUrlHashUnsupported(HashError):
-    """A hash was provided for a version-control-system-based requirement, but
-    we don't have a method for hashing those."""
-
-    order = 1
-    head = ("Can't verify hashes for these file:// requirements because they "
-            "point to directories:")
-
-
-class HashMissing(HashError):
-    """A hash was needed for a requirement but is absent."""
-
-    order = 2
-    head = ('Hashes are required in --require-hashes mode, but they are '
-            'missing from some requirements. Here is a list of those '
-            'requirements along with the hashes their downloaded archives '
-            'actually had. Add lines like these to your requirements files to '
-            'prevent tampering. (If you did not enable --require-hashes '
-            'manually, note that it turns on automatically when any package '
-            'has a hash.)')
-
-    def __init__(self, gotten_hash):
-        """
-        :param gotten_hash: The hash of the (possibly malicious) archive we
-            just downloaded
-        """
-        self.gotten_hash = gotten_hash
-
-    def body(self):
-        # Dodge circular import.
-        from pip._internal.utils.hashes import FAVORITE_HASH
-
-        package = None
-        if self.req:
-            # In the case of URL-based requirements, display the original URL
-            # seen in the requirements file rather than the package name,
-            # so the output can be directly copied into the requirements file.
-            package = (self.req.original_link if self.req.original_link
-                       # In case someone feeds something downright stupid
-                       # to InstallRequirement's constructor.
-                       else getattr(self.req, 'req', None))
-        return '    %s --hash=%s:%s' % (package or 'unknown package',
-                                        FAVORITE_HASH,
-                                        self.gotten_hash)
-
-
-class HashUnpinned(HashError):
-    """A requirement had a hash specified but was not pinned to a specific
-    version."""
-
-    order = 3
-    head = ('In --require-hashes mode, all requirements must have their '
-            'versions pinned with ==. These do not:')
-
-
-class HashMismatch(HashError):
-    """
-    Distribution file hash values don't match.
-
-    :ivar package_name: The name of the package that triggered the hash
-        mismatch. Feel free to write to this after the exception is raise to
-        improve its error message.
-
-    """
-    order = 4
-    head = ('THESE PACKAGES DO NOT MATCH THE HASHES FROM THE REQUIREMENTS '
-            'FILE. If you have updated the package versions, please update '
-            'the hashes. Otherwise, examine the package contents carefully; '
-            'someone may have tampered with them.')
-
-    def __init__(self, allowed, gots):
-        """
-        :param allowed: A dict of algorithm names pointing to lists of allowed
-            hex digests
-        :param gots: A dict of algorithm names pointing to hashes we
-            actually got from the files under suspicion
-        """
-        self.allowed = allowed
-        self.gots = gots
-
-    def body(self):
-        return '    %s:\n%s' % (self._requirement_name(),
-                                self._hash_comparison())
-
-    def _hash_comparison(self):
-        """
-        Return a comparison of actual and expected hash values.
-
-        Example::
-
-               Expected sha256 abcdeabcdeabcdeabcdeabcdeabcdeabcdeabcdeabcde
-                            or 123451234512345123451234512345123451234512345
-                    Got        bcdefbcdefbcdefbcdefbcdefbcdefbcdefbcdefbcdef
-
-        """
-        def hash_then_or(hash_name):
-            # For now, all the decent hashes have 6-char names, so we can get
-            # away with hard-coding space literals.
-            return chain([hash_name], repeat('    or'))
-
-        lines = []
-        for hash_name, expecteds in iteritems(self.allowed):
-            prefix = hash_then_or(hash_name)
-            lines.extend(('        Expected %s %s' % (next(prefix), e))
-                         for e in expecteds)
-            lines.append('             Got        %s\n' %
-                         self.gots[hash_name].hexdigest())
-            prefix = '    or'
-        return '\n'.join(lines)
-
-
-class UnsupportedPythonVersion(InstallationError):
-    """Unsupported python version according to Requires-Python package
-    metadata."""
-
-
-class ConfigurationFileCouldNotBeLoaded(ConfigurationError):
-    """When there are errors while loading a configuration file
-    """
-
-    def __init__(self, reason="could not be loaded", fname=None, error=None):
-        super(ConfigurationFileCouldNotBeLoaded, self).__init__(error)
-        self.reason = reason
-        self.fname = fname
-        self.error = error
-
-    def __str__(self):
-        if self.fname is not None:
-            message_part = " in {}.".format(self.fname)
-        else:
-            assert self.error is not None
-            message_part = ".\n{}\n".format(self.error.message)
-        return "Configuration file {}{}".format(self.reason, message_part)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/index.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/index.py
deleted file mode 100644
index 9eda3a3..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/index.py
+++ /dev/null
@@ -1,990 +0,0 @@
-"""Routines related to PyPI, indexes"""
-from __future__ import absolute_import
-
-import cgi
-import itertools
-import logging
-import mimetypes
-import os
-import posixpath
-import re
-import sys
-from collections import namedtuple
-
-from pip._vendor import html5lib, requests, six
-from pip._vendor.distlib.compat import unescape
-from pip._vendor.packaging import specifiers
-from pip._vendor.packaging.utils import canonicalize_name
-from pip._vendor.packaging.version import parse as parse_version
-from pip._vendor.requests.exceptions import RetryError, SSLError
-from pip._vendor.six.moves.urllib import parse as urllib_parse
-from pip._vendor.six.moves.urllib import request as urllib_request
-
-from pip._internal.download import HAS_TLS, is_url, path_to_url, url_to_path
-from pip._internal.exceptions import (
-    BestVersionAlreadyInstalled, DistributionNotFound, InvalidWheelFilename,
-    UnsupportedWheel,
-)
-from pip._internal.models.candidate import InstallationCandidate
-from pip._internal.models.format_control import FormatControl
-from pip._internal.models.index import PyPI
-from pip._internal.models.link import Link
-from pip._internal.pep425tags import get_supported
-from pip._internal.utils.compat import ipaddress
-from pip._internal.utils.logging import indent_log
-from pip._internal.utils.misc import (
-    ARCHIVE_EXTENSIONS, SUPPORTED_EXTENSIONS, WHEEL_EXTENSION, normalize_path,
-    redact_password_from_url,
-)
-from pip._internal.utils.packaging import check_requires_python
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-from pip._internal.wheel import Wheel
-
-if MYPY_CHECK_RUNNING:
-    from logging import Logger  # noqa: F401
-    from typing import (  # noqa: F401
-        Tuple, Optional, Any, List, Union, Callable, Set, Sequence,
-        Iterable, MutableMapping
-    )
-    from pip._vendor.packaging.version import _BaseVersion  # noqa: F401
-    from pip._vendor.requests import Response  # noqa: F401
-    from pip._internal.req import InstallRequirement  # noqa: F401
-    from pip._internal.download import PipSession  # noqa: F401
-
-    SecureOrigin = Tuple[str, str, Optional[str]]
-    BuildTag = Tuple[Any, ...]  # either emply tuple or Tuple[int, str]
-    CandidateSortingKey = Tuple[int, _BaseVersion, BuildTag, Optional[int]]
-
-__all__ = ['FormatControl', 'PackageFinder']
-
-
-SECURE_ORIGINS = [
-    # protocol, hostname, port
-    # Taken from Chrome's list of secure origins (See: http://bit.ly/1qrySKC)
-    ("https", "*", "*"),
-    ("*", "localhost", "*"),
-    ("*", "127.0.0.0/8", "*"),
-    ("*", "::1/128", "*"),
-    ("file", "*", None),
-    # ssh is always secure.
-    ("ssh", "*", "*"),
-]  # type: List[SecureOrigin]
-
-
-logger = logging.getLogger(__name__)
-
-
-def _match_vcs_scheme(url):
-    # type: (str) -> Optional[str]
-    """Look for VCS schemes in the URL.
-
-    Returns the matched VCS scheme, or None if there's no match.
-    """
-    from pip._internal.vcs import VcsSupport
-    for scheme in VcsSupport.schemes:
-        if url.lower().startswith(scheme) and url[len(scheme)] in '+:':
-            return scheme
-    return None
-
-
-def _is_url_like_archive(url):
-    # type: (str) -> bool
-    """Return whether the URL looks like an archive.
-    """
-    filename = Link(url).filename
-    for bad_ext in ARCHIVE_EXTENSIONS:
-        if filename.endswith(bad_ext):
-            return True
-    return False
-
-
-class _NotHTML(Exception):
-    def __init__(self, content_type, request_desc):
-        # type: (str, str) -> None
-        super(_NotHTML, self).__init__(content_type, request_desc)
-        self.content_type = content_type
-        self.request_desc = request_desc
-
-
-def _ensure_html_header(response):
-    # type: (Response) -> None
-    """Check the Content-Type header to ensure the response contains HTML.
-
-    Raises `_NotHTML` if the content type is not text/html.
-    """
-    content_type = response.headers.get("Content-Type", "")
-    if not content_type.lower().startswith("text/html"):
-        raise _NotHTML(content_type, response.request.method)
-
-
-class _NotHTTP(Exception):
-    pass
-
-
-def _ensure_html_response(url, session):
-    # type: (str, PipSession) -> None
-    """Send a HEAD request to the URL, and ensure the response contains HTML.
-
-    Raises `_NotHTTP` if the URL is not available for a HEAD request, or
-    `_NotHTML` if the content type is not text/html.
-    """
-    scheme, netloc, path, query, fragment = urllib_parse.urlsplit(url)
-    if scheme not in {'http', 'https'}:
-        raise _NotHTTP()
-
-    resp = session.head(url, allow_redirects=True)
-    resp.raise_for_status()
-
-    _ensure_html_header(resp)
-
-
-def _get_html_response(url, session):
-    # type: (str, PipSession) -> Response
-    """Access an HTML page with GET, and return the response.
-
-    This consists of three parts:
-
-    1. If the URL looks suspiciously like an archive, send a HEAD first to
-       check the Content-Type is HTML, to avoid downloading a large file.
-       Raise `_NotHTTP` if the content type cannot be determined, or
-       `_NotHTML` if it is not HTML.
-    2. Actually perform the request. Raise HTTP exceptions on network failures.
-    3. Check the Content-Type header to make sure we got HTML, and raise
-       `_NotHTML` otherwise.
-    """
-    if _is_url_like_archive(url):
-        _ensure_html_response(url, session=session)
-
-    logger.debug('Getting page %s', url)
-
-    resp = session.get(
-        url,
-        headers={
-            "Accept": "text/html",
-            # We don't want to blindly returned cached data for
-            # /simple/, because authors generally expecting that
-            # twine upload && pip install will function, but if
-            # they've done a pip install in the last ~10 minutes
-            # it won't. Thus by setting this to zero we will not
-            # blindly use any cached data, however the benefit of
-            # using max-age=0 instead of no-cache, is that we will
-            # still support conditional requests, so we will still
-            # minimize traffic sent in cases where the page hasn't
-            # changed at all, we will just always incur the round
-            # trip for the conditional GET now instead of only
-            # once per 10 minutes.
-            # For more information, please see pypa/pip#5670.
-            "Cache-Control": "max-age=0",
-        },
-    )
-    resp.raise_for_status()
-
-    # The check for archives above only works if the url ends with
-    # something that looks like an archive. However that is not a
-    # requirement of an url. Unless we issue a HEAD request on every
-    # url we cannot know ahead of time for sure if something is HTML
-    # or not. However we can check after we've downloaded it.
-    _ensure_html_header(resp)
-
-    return resp
-
-
-def _handle_get_page_fail(
-    link,  # type: Link
-    reason,  # type: Union[str, Exception]
-    meth=None  # type: Optional[Callable[..., None]]
-):
-    # type: (...) -> None
-    if meth is None:
-        meth = logger.debug
-    meth("Could not fetch URL %s: %s - skipping", link, reason)
-
-
-def _get_html_page(link, session=None):
-    # type: (Link, Optional[PipSession]) -> Optional[HTMLPage]
-    if session is None:
-        raise TypeError(
-            "_get_html_page() missing 1 required keyword argument: 'session'"
-        )
-
-    url = link.url.split('#', 1)[0]
-
-    # Check for VCS schemes that do not support lookup as web pages.
-    vcs_scheme = _match_vcs_scheme(url)
-    if vcs_scheme:
-        logger.debug('Cannot look at %s URL %s', vcs_scheme, link)
-        return None
-
-    # Tack index.html onto file:// URLs that point to directories
-    scheme, _, path, _, _, _ = urllib_parse.urlparse(url)
-    if (scheme == 'file' and os.path.isdir(urllib_request.url2pathname(path))):
-        # add trailing slash if not present so urljoin doesn't trim
-        # final segment
-        if not url.endswith('/'):
-            url += '/'
-        url = urllib_parse.urljoin(url, 'index.html')
-        logger.debug(' file: URL is directory, getting %s', url)
-
-    try:
-        resp = _get_html_response(url, session=session)
-    except _NotHTTP as exc:
-        logger.debug(
-            'Skipping page %s because it looks like an archive, and cannot '
-            'be checked by HEAD.', link,
-        )
-    except _NotHTML as exc:
-        logger.debug(
-            'Skipping page %s because the %s request got Content-Type: %s',
-            link, exc.request_desc, exc.content_type,
-        )
-    except requests.HTTPError as exc:
-        _handle_get_page_fail(link, exc)
-    except RetryError as exc:
-        _handle_get_page_fail(link, exc)
-    except SSLError as exc:
-        reason = "There was a problem confirming the ssl certificate: "
-        reason += str(exc)
-        _handle_get_page_fail(link, reason, meth=logger.info)
-    except requests.ConnectionError as exc:
-        _handle_get_page_fail(link, "connection error: %s" % exc)
-    except requests.Timeout:
-        _handle_get_page_fail(link, "timed out")
-    else:
-        return HTMLPage(resp.content, resp.url, resp.headers)
-    return None
-
-
-class PackageFinder(object):
-    """This finds packages.
-
-    This is meant to match easy_install's technique for looking for
-    packages, by reading pages and looking for appropriate links.
-    """
-
-    def __init__(
-        self,
-        find_links,  # type: List[str]
-        index_urls,  # type: List[str]
-        allow_all_prereleases=False,  # type: bool
-        trusted_hosts=None,  # type: Optional[Iterable[str]]
-        session=None,  # type: Optional[PipSession]
-        format_control=None,  # type: Optional[FormatControl]
-        platform=None,  # type: Optional[str]
-        versions=None,  # type: Optional[List[str]]
-        abi=None,  # type: Optional[str]
-        implementation=None,  # type: Optional[str]
-        prefer_binary=False  # type: bool
-    ):
-        # type: (...) -> None
-        """Create a PackageFinder.
-
-        :param format_control: A FormatControl object or None. Used to control
-            the selection of source packages / binary packages when consulting
-            the index and links.
-        :param platform: A string or None. If None, searches for packages
-            that are supported by the current system. Otherwise, will find
-            packages that can be built on the platform passed in. These
-            packages will only be downloaded for distribution: they will
-            not be built locally.
-        :param versions: A list of strings or None. This is passed directly
-            to pep425tags.py in the get_supported() method.
-        :param abi: A string or None. This is passed directly
-            to pep425tags.py in the get_supported() method.
-        :param implementation: A string or None. This is passed directly
-            to pep425tags.py in the get_supported() method.
-        """
-        if session is None:
-            raise TypeError(
-                "PackageFinder() missing 1 required keyword argument: "
-                "'session'"
-            )
-
-        # Build find_links. If an argument starts with ~, it may be
-        # a local file relative to a home directory. So try normalizing
-        # it and if it exists, use the normalized version.
-        # This is deliberately conservative - it might be fine just to
-        # blindly normalize anything starting with a ~...
-        self.find_links = []  # type: List[str]
-        for link in find_links:
-            if link.startswith('~'):
-                new_link = normalize_path(link)
-                if os.path.exists(new_link):
-                    link = new_link
-            self.find_links.append(link)
-
-        self.index_urls = index_urls
-
-        # These are boring links that have already been logged somehow:
-        self.logged_links = set()  # type: Set[Link]
-
-        self.format_control = format_control or FormatControl(set(), set())
-
-        # Domains that we won't emit warnings for when not using HTTPS
-        self.secure_origins = [
-            ("*", host, "*")
-            for host in (trusted_hosts if trusted_hosts else [])
-        ]  # type: List[SecureOrigin]
-
-        # Do we want to allow _all_ pre-releases?
-        self.allow_all_prereleases = allow_all_prereleases
-
-        # The Session we'll use to make requests
-        self.session = session
-
-        # The valid tags to check potential found wheel candidates against
-        self.valid_tags = get_supported(
-            versions=versions,
-            platform=platform,
-            abi=abi,
-            impl=implementation,
-        )
-
-        # Do we prefer old, but valid, binary dist over new source dist
-        self.prefer_binary = prefer_binary
-
-        # If we don't have TLS enabled, then WARN if anyplace we're looking
-        # relies on TLS.
-        if not HAS_TLS:
-            for link in itertools.chain(self.index_urls, self.find_links):
-                parsed = urllib_parse.urlparse(link)
-                if parsed.scheme == "https":
-                    logger.warning(
-                        "pip is configured with locations that require "
-                        "TLS/SSL, however the ssl module in Python is not "
-                        "available."
-                    )
-                    break
-
-    def get_formatted_locations(self):
-        # type: () -> str
-        lines = []
-        if self.index_urls and self.index_urls != [PyPI.simple_url]:
-            lines.append(
-                "Looking in indexes: {}".format(", ".join(
-                    redact_password_from_url(url) for url in self.index_urls))
-            )
-        if self.find_links:
-            lines.append(
-                "Looking in links: {}".format(", ".join(self.find_links))
-            )
-        return "\n".join(lines)
-
-    @staticmethod
-    def _sort_locations(locations, expand_dir=False):
-        # type: (Sequence[str], bool) -> Tuple[List[str], List[str]]
-        """
-        Sort locations into "files" (archives) and "urls", and return
-        a pair of lists (files,urls)
-        """
-        files = []
-        urls = []
-
-        # puts the url for the given file path into the appropriate list
-        def sort_path(path):
-            url = path_to_url(path)
-            if mimetypes.guess_type(url, strict=False)[0] == 'text/html':
-                urls.append(url)
-            else:
-                files.append(url)
-
-        for url in locations:
-
-            is_local_path = os.path.exists(url)
-            is_file_url = url.startswith('file:')
-
-            if is_local_path or is_file_url:
-                if is_local_path:
-                    path = url
-                else:
-                    path = url_to_path(url)
-                if os.path.isdir(path):
-                    if expand_dir:
-                        path = os.path.realpath(path)
-                        for item in os.listdir(path):
-                            sort_path(os.path.join(path, item))
-                    elif is_file_url:
-                        urls.append(url)
-                    else:
-                        logger.warning(
-                            "Path '{0}' is ignored: "
-                            "it is a directory.".format(path),
-                        )
-                elif os.path.isfile(path):
-                    sort_path(path)
-                else:
-                    logger.warning(
-                        "Url '%s' is ignored: it is neither a file "
-                        "nor a directory.", url,
-                    )
-            elif is_url(url):
-                # Only add url with clear scheme
-                urls.append(url)
-            else:
-                logger.warning(
-                    "Url '%s' is ignored. It is either a non-existing "
-                    "path or lacks a specific scheme.", url,
-                )
-
-        return files, urls
-
-    def _candidate_sort_key(self, candidate):
-        # type: (InstallationCandidate) -> CandidateSortingKey
-        """
-        Function used to generate link sort key for link tuples.
-        The greater the return value, the more preferred it is.
-        If not finding wheels, then sorted by version only.
-        If finding wheels, then the sort order is by version, then:
-          1. existing installs
-          2. wheels ordered via Wheel.support_index_min(self.valid_tags)
-          3. source archives
-        If prefer_binary was set, then all wheels are sorted above sources.
-        Note: it was considered to embed this logic into the Link
-              comparison operators, but then different sdist links
-              with the same version, would have to be considered equal
-        """
-        support_num = len(self.valid_tags)
-        build_tag = tuple()  # type: BuildTag
-        binary_preference = 0
-        if candidate.location.is_wheel:
-            # can raise InvalidWheelFilename
-            wheel = Wheel(candidate.location.filename)
-            if not wheel.supported(self.valid_tags):
-                raise UnsupportedWheel(
-                    "%s is not a supported wheel for this platform. It "
-                    "can't be sorted." % wheel.filename
-                )
-            if self.prefer_binary:
-                binary_preference = 1
-            pri = -(wheel.support_index_min(self.valid_tags))
-            if wheel.build_tag is not None:
-                match = re.match(r'^(\d+)(.*)$', wheel.build_tag)
-                build_tag_groups = match.groups()
-                build_tag = (int(build_tag_groups[0]), build_tag_groups[1])
-        else:  # sdist
-            pri = -(support_num)
-        return (binary_preference, candidate.version, build_tag, pri)
-
-    def _validate_secure_origin(self, logger, location):
-        # type: (Logger, Link) -> bool
-        # Determine if this url used a secure transport mechanism
-        parsed = urllib_parse.urlparse(str(location))
-        origin = (parsed.scheme, parsed.hostname, parsed.port)
-
-        # The protocol to use to see if the protocol matches.
-        # Don't count the repository type as part of the protocol: in
-        # cases such as "git+ssh", only use "ssh". (I.e., Only verify against
-        # the last scheme.)
-        protocol = origin[0].rsplit('+', 1)[-1]
-
-        # Determine if our origin is a secure origin by looking through our
-        # hardcoded list of secure origins, as well as any additional ones
-        # configured on this PackageFinder instance.
-        for secure_origin in (SECURE_ORIGINS + self.secure_origins):
-            if protocol != secure_origin[0] and secure_origin[0] != "*":
-                continue
-
-            try:
-                # We need to do this decode dance to ensure that we have a
-                # unicode object, even on Python 2.x.
-                addr = ipaddress.ip_address(
-                    origin[1]
-                    if (
-                        isinstance(origin[1], six.text_type) or
-                        origin[1] is None
-                    )
-                    else origin[1].decode("utf8")
-                )
-                network = ipaddress.ip_network(
-                    secure_origin[1]
-                    if isinstance(secure_origin[1], six.text_type)
-                    # setting secure_origin[1] to proper Union[bytes, str]
-                    # creates problems in other places
-                    else secure_origin[1].decode("utf8")  # type: ignore
-                )
-            except ValueError:
-                # We don't have both a valid address or a valid network, so
-                # we'll check this origin against hostnames.
-                if (origin[1] and
-                        origin[1].lower() != secure_origin[1].lower() and
-                        secure_origin[1] != "*"):
-                    continue
-            else:
-                # We have a valid address and network, so see if the address
-                # is contained within the network.
-                if addr not in network:
-                    continue
-
-            # Check to see if the port patches
-            if (origin[2] != secure_origin[2] and
-                    secure_origin[2] != "*" and
-                    secure_origin[2] is not None):
-                continue
-
-            # If we've gotten here, then this origin matches the current
-            # secure origin and we should return True
-            return True
-
-        # If we've gotten to this point, then the origin isn't secure and we
-        # will not accept it as a valid location to search. We will however
-        # log a warning that we are ignoring it.
-        logger.warning(
-            "The repository located at %s is not a trusted or secure host and "
-            "is being ignored. If this repository is available via HTTPS we "
-            "recommend you use HTTPS instead, otherwise you may silence "
-            "this warning and allow it anyway with '--trusted-host %s'.",
-            parsed.hostname,
-            parsed.hostname,
-        )
-
-        return False
-
-    def _get_index_urls_locations(self, project_name):
-        # type: (str) -> List[str]
-        """Returns the locations found via self.index_urls
-
-        Checks the url_name on the main (first in the list) index and
-        use this url_name to produce all locations
-        """
-
-        def mkurl_pypi_url(url):
-            loc = posixpath.join(
-                url,
-                urllib_parse.quote(canonicalize_name(project_name)))
-            # For maximum compatibility with easy_install, ensure the path
-            # ends in a trailing slash.  Although this isn't in the spec
-            # (and PyPI can handle it without the slash) some other index
-            # implementations might break if they relied on easy_install's
-            # behavior.
-            if not loc.endswith('/'):
-                loc = loc + '/'
-            return loc
-
-        return [mkurl_pypi_url(url) for url in self.index_urls]
-
-    def find_all_candidates(self, project_name):
-        # type: (str) -> List[Optional[InstallationCandidate]]
-        """Find all available InstallationCandidate for project_name
-
-        This checks index_urls and find_links.
-        All versions found are returned as an InstallationCandidate list.
-
-        See _link_package_versions for details on which files are accepted
-        """
-        index_locations = self._get_index_urls_locations(project_name)
-        index_file_loc, index_url_loc = self._sort_locations(index_locations)
-        fl_file_loc, fl_url_loc = self._sort_locations(
-            self.find_links, expand_dir=True,
-        )
-
-        file_locations = (Link(url) for url in itertools.chain(
-            index_file_loc, fl_file_loc,
-        ))
-
-        # We trust every url that the user has given us whether it was given
-        #   via --index-url or --find-links.
-        # We want to filter out any thing which does not have a secure origin.
-        url_locations = [
-            link for link in itertools.chain(
-                (Link(url) for url in index_url_loc),
-                (Link(url) for url in fl_url_loc),
-            )
-            if self._validate_secure_origin(logger, link)
-        ]
-
-        logger.debug('%d location(s) to search for versions of %s:',
-                     len(url_locations), project_name)
-
-        for location in url_locations:
-            logger.debug('* %s', location)
-
-        canonical_name = canonicalize_name(project_name)
-        formats = self.format_control.get_allowed_formats(canonical_name)
-        search = Search(project_name, canonical_name, formats)
-        find_links_versions = self._package_versions(
-            # We trust every directly linked archive in find_links
-            (Link(url, '-f') for url in self.find_links),
-            search
-        )
-
-        page_versions = []
-        for page in self._get_pages(url_locations, project_name):
-            logger.debug('Analyzing links from page %s', page.url)
-            with indent_log():
-                page_versions.extend(
-                    self._package_versions(page.iter_links(), search)
-                )
-
-        file_versions = self._package_versions(file_locations, search)
-        if file_versions:
-            file_versions.sort(reverse=True)
-            logger.debug(
-                'Local files found: %s',
-                ', '.join([
-                    url_to_path(candidate.location.url)
-                    for candidate in file_versions
-                ])
-            )
-
-        # This is an intentional priority ordering
-        return file_versions + find_links_versions + page_versions
-
-    def find_requirement(self, req, upgrade):
-        # type: (InstallRequirement, bool) -> Optional[Link]
-        """Try to find a Link matching req
-
-        Expects req, an InstallRequirement and upgrade, a boolean
-        Returns a Link if found,
-        Raises DistributionNotFound or BestVersionAlreadyInstalled otherwise
-        """
-        all_candidates = self.find_all_candidates(req.name)
-
-        # Filter out anything which doesn't match our specifier
-        compatible_versions = set(
-            req.specifier.filter(
-                # We turn the version object into a str here because otherwise
-                # when we're debundled but setuptools isn't, Python will see
-                # packaging.version.Version and
-                # pkg_resources._vendor.packaging.version.Version as different
-                # types. This way we'll use a str as a common data interchange
-                # format. If we stop using the pkg_resources provided specifier
-                # and start using our own, we can drop the cast to str().
-                [str(c.version) for c in all_candidates],
-                prereleases=(
-                    self.allow_all_prereleases
-                    if self.allow_all_prereleases else None
-                ),
-            )
-        )
-        applicable_candidates = [
-            # Again, converting to str to deal with debundling.
-            c for c in all_candidates if str(c.version) in compatible_versions
-        ]
-
-        if applicable_candidates:
-            best_candidate = max(applicable_candidates,
-                                 key=self._candidate_sort_key)
-        else:
-            best_candidate = None
-
-        if req.satisfied_by is not None:
-            installed_version = parse_version(req.satisfied_by.version)
-        else:
-            installed_version = None
-
-        if installed_version is None and best_candidate is None:
-            logger.critical(
-                'Could not find a version that satisfies the requirement %s '
-                '(from versions: %s)',
-                req,
-                ', '.join(
-                    sorted(
-                        {str(c.version) for c in all_candidates},
-                        key=parse_version,
-                    )
-                )
-            )
-
-            raise DistributionNotFound(
-                'No matching distribution found for %s' % req
-            )
-
-        best_installed = False
-        if installed_version and (
-                best_candidate is None or
-                best_candidate.version <= installed_version):
-            best_installed = True
-
-        if not upgrade and installed_version is not None:
-            if best_installed:
-                logger.debug(
-                    'Existing installed version (%s) is most up-to-date and '
-                    'satisfies requirement',
-                    installed_version,
-                )
-            else:
-                logger.debug(
-                    'Existing installed version (%s) satisfies requirement '
-                    '(most up-to-date version is %s)',
-                    installed_version,
-                    best_candidate.version,
-                )
-            return None
-
-        if best_installed:
-            # We have an existing version, and its the best version
-            logger.debug(
-                'Installed version (%s) is most up-to-date (past versions: '
-                '%s)',
-                installed_version,
-                ', '.join(sorted(compatible_versions, key=parse_version)) or
-                "none",
-            )
-            raise BestVersionAlreadyInstalled
-
-        logger.debug(
-            'Using version %s (newest of versions: %s)',
-            best_candidate.version,
-            ', '.join(sorted(compatible_versions, key=parse_version))
-        )
-        return best_candidate.location
-
-    def _get_pages(self, locations, project_name):
-        # type: (Iterable[Link], str) -> Iterable[HTMLPage]
-        """
-        Yields (page, page_url) from the given locations, skipping
-        locations that have errors.
-        """
-        seen = set()  # type: Set[Link]
-        for location in locations:
-            if location in seen:
-                continue
-            seen.add(location)
-
-            page = _get_html_page(location, session=self.session)
-            if page is None:
-                continue
-
-            yield page
-
-    _py_version_re = re.compile(r'-py([123]\.?[0-9]?)$')
-
-    def _sort_links(self, links):
-        # type: (Iterable[Link]) -> List[Link]
-        """
-        Returns elements of links in order, non-egg links first, egg links
-        second, while eliminating duplicates
-        """
-        eggs, no_eggs = [], []
-        seen = set()  # type: Set[Link]
-        for link in links:
-            if link not in seen:
-                seen.add(link)
-                if link.egg_fragment:
-                    eggs.append(link)
-                else:
-                    no_eggs.append(link)
-        return no_eggs + eggs
-
-    def _package_versions(
-        self,
-        links,  # type: Iterable[Link]
-        search  # type: Search
-    ):
-        # type: (...) -> List[Optional[InstallationCandidate]]
-        result = []
-        for link in self._sort_links(links):
-            v = self._link_package_versions(link, search)
-            if v is not None:
-                result.append(v)
-        return result
-
-    def _log_skipped_link(self, link, reason):
-        # type: (Link, str) -> None
-        if link not in self.logged_links:
-            logger.debug('Skipping link %s; %s', link, reason)
-            self.logged_links.add(link)
-
-    def _link_package_versions(self, link, search):
-        # type: (Link, Search) -> Optional[InstallationCandidate]
-        """Return an InstallationCandidate or None"""
-        version = None
-        if link.egg_fragment:
-            egg_info = link.egg_fragment
-            ext = link.ext
-        else:
-            egg_info, ext = link.splitext()
-            if not ext:
-                self._log_skipped_link(link, 'not a file')
-                return None
-            if ext not in SUPPORTED_EXTENSIONS:
-                self._log_skipped_link(
-                    link, 'unsupported archive format: %s' % ext,
-                )
-                return None
-            if "binary" not in search.formats and ext == WHEEL_EXTENSION:
-                self._log_skipped_link(
-                    link, 'No binaries permitted for %s' % search.supplied,
-                )
-                return None
-            if "macosx10" in link.path and ext == '.zip':
-                self._log_skipped_link(link, 'macosx10 one')
-                return None
-            if ext == WHEEL_EXTENSION:
-                try:
-                    wheel = Wheel(link.filename)
-                except InvalidWheelFilename:
-                    self._log_skipped_link(link, 'invalid wheel filename')
-                    return None
-                if canonicalize_name(wheel.name) != search.canonical:
-                    self._log_skipped_link(
-                        link, 'wrong project name (not %s)' % search.supplied)
-                    return None
-
-                if not wheel.supported(self.valid_tags):
-                    self._log_skipped_link(
-                        link, 'it is not compatible with this Python')
-                    return None
-
-                version = wheel.version
-
-        # This should be up by the search.ok_binary check, but see issue 2700.
-        if "source" not in search.formats and ext != WHEEL_EXTENSION:
-            self._log_skipped_link(
-                link, 'No sources permitted for %s' % search.supplied,
-            )
-            return None
-
-        if not version:
-            version = _egg_info_matches(egg_info, search.canonical)
-        if not version:
-            self._log_skipped_link(
-                link, 'Missing project version for %s' % search.supplied)
-            return None
-
-        match = self._py_version_re.search(version)
-        if match:
-            version = version[:match.start()]
-            py_version = match.group(1)
-            if py_version != sys.version[:3]:
-                self._log_skipped_link(
-                    link, 'Python version is incorrect')
-                return None
-        try:
-            support_this_python = check_requires_python(link.requires_python)
-        except specifiers.InvalidSpecifier:
-            logger.debug("Package %s has an invalid Requires-Python entry: %s",
-                         link.filename, link.requires_python)
-            support_this_python = True
-
-        if not support_this_python:
-            logger.debug("The package %s is incompatible with the python "
-                         "version in use. Acceptable python versions are: %s",
-                         link, link.requires_python)
-            return None
-        logger.debug('Found link %s, version: %s', link, version)
-
-        return InstallationCandidate(search.supplied, version, link)
-
-
-def _find_name_version_sep(egg_info, canonical_name):
-    # type: (str, str) -> int
-    """Find the separator's index based on the package's canonical name.
-
-    `egg_info` must be an egg info string for the given package, and
-    `canonical_name` must be the package's canonical name.
-
-    This function is needed since the canonicalized name does not necessarily
-    have the same length as the egg info's name part. An example::
-
-    >>> egg_info = 'foo__bar-1.0'
-    >>> canonical_name = 'foo-bar'
-    >>> _find_name_version_sep(egg_info, canonical_name)
-    8
-    """
-    # Project name and version must be separated by one single dash. Find all
-    # occurrences of dashes; if the string in front of it matches the canonical
-    # name, this is the one separating the name and version parts.
-    for i, c in enumerate(egg_info):
-        if c != "-":
-            continue
-        if canonicalize_name(egg_info[:i]) == canonical_name:
-            return i
-    raise ValueError("{} does not match {}".format(egg_info, canonical_name))
-
-
-def _egg_info_matches(egg_info, canonical_name):
-    # type: (str, str) -> Optional[str]
-    """Pull the version part out of a string.
-
-    :param egg_info: The string to parse. E.g. foo-2.1
-    :param canonical_name: The canonicalized name of the package this
-        belongs to.
-    """
-    try:
-        version_start = _find_name_version_sep(egg_info, canonical_name) + 1
-    except ValueError:
-        return None
-    version = egg_info[version_start:]
-    if not version:
-        return None
-    return version
-
-
-def _determine_base_url(document, page_url):
-    """Determine the HTML document's base URL.
-
-    This looks for a ``<base>`` tag in the HTML document. If present, its href
-    attribute denotes the base URL of anchor tags in the document. If there is
-    no such tag (or if it does not have a valid href attribute), the HTML
-    file's URL is used as the base URL.
-
-    :param document: An HTML document representation. The current
-        implementation expects the result of ``html5lib.parse()``.
-    :param page_url: The URL of the HTML document.
-    """
-    for base in document.findall(".//base"):
-        href = base.get("href")
-        if href is not None:
-            return href
-    return page_url
-
-
-def _get_encoding_from_headers(headers):
-    """Determine if we have any encoding information in our headers.
-    """
-    if headers and "Content-Type" in headers:
-        content_type, params = cgi.parse_header(headers["Content-Type"])
-        if "charset" in params:
-            return params['charset']
-    return None
-
-
-_CLEAN_LINK_RE = re.compile(r'[^a-z0-9$&+,/:;=?@.#%_\\|-]', re.I)
-
-
-def _clean_link(url):
-    # type: (str) -> str
-    """Makes sure a link is fully encoded.  That is, if a ' ' shows up in
-    the link, it will be rewritten to %20 (while not over-quoting
-    % or other characters)."""
-    return _CLEAN_LINK_RE.sub(lambda match: '%%%2x' % ord(match.group(0)), url)
-
-
-class HTMLPage(object):
-    """Represents one page, along with its URL"""
-
-    def __init__(self, content, url, headers=None):
-        # type: (bytes, str, MutableMapping[str, str]) -> None
-        self.content = content
-        self.url = url
-        self.headers = headers
-
-    def __str__(self):
-        return redact_password_from_url(self.url)
-
-    def iter_links(self):
-        # type: () -> Iterable[Link]
-        """Yields all links in the page"""
-        document = html5lib.parse(
-            self.content,
-            transport_encoding=_get_encoding_from_headers(self.headers),
-            namespaceHTMLElements=False,
-        )
-        base_url = _determine_base_url(document, self.url)
-        for anchor in document.findall(".//a"):
-            if anchor.get("href"):
-                href = anchor.get("href")
-                url = _clean_link(urllib_parse.urljoin(base_url, href))
-                pyrequire = anchor.get('data-requires-python')
-                pyrequire = unescape(pyrequire) if pyrequire else None
-                yield Link(url, self.url, requires_python=pyrequire)
-
-
-Search = namedtuple('Search', 'supplied canonical formats')
-"""Capture key aspects of a search.
-
-:attribute supplied: The user supplied package.
-:attribute canonical: The canonical package name.
-:attribute formats: The formats allowed for this package. Should be a set
-    with 'binary' or 'source' or both in it.
-"""
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/locations.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/locations.py
deleted file mode 100644
index c6e2a3e..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/locations.py
+++ /dev/null
@@ -1,211 +0,0 @@
-"""Locations where we look for configs, install stuff, etc"""
-from __future__ import absolute_import
-
-import os
-import os.path
-import platform
-import site
-import sys
-import sysconfig
-from distutils import sysconfig as distutils_sysconfig
-from distutils.command.install import SCHEME_KEYS  # type: ignore
-
-from pip._internal.utils import appdirs
-from pip._internal.utils.compat import WINDOWS, expanduser
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if MYPY_CHECK_RUNNING:
-    from typing import Any, Union, Dict, List, Optional  # noqa: F401
-
-
-# Application Directories
-USER_CACHE_DIR = appdirs.user_cache_dir("pip")
-
-
-DELETE_MARKER_MESSAGE = '''\
-This file is placed here by pip to indicate the source was put
-here by pip.
-
-Once this package is successfully installed this source code will be
-deleted (unless you remove this file).
-'''
-PIP_DELETE_MARKER_FILENAME = 'pip-delete-this-directory.txt'
-
-
-def write_delete_marker_file(directory):
-    # type: (str) -> None
-    """
-    Write the pip delete marker file into this directory.
-    """
-    filepath = os.path.join(directory, PIP_DELETE_MARKER_FILENAME)
-    with open(filepath, 'w') as marker_fp:
-        marker_fp.write(DELETE_MARKER_MESSAGE)
-
-
-def running_under_virtualenv():
-    # type: () -> bool
-    """
-    Return True if we're running inside a virtualenv, False otherwise.
-
-    """
-    if hasattr(sys, 'real_prefix'):
-        return True
-    elif sys.prefix != getattr(sys, "base_prefix", sys.prefix):
-        return True
-
-    return False
-
-
-def virtualenv_no_global():
-    # type: () -> bool
-    """
-    Return True if in a venv and no system site packages.
-    """
-    # this mirrors the logic in virtualenv.py for locating the
-    # no-global-site-packages.txt file
-    site_mod_dir = os.path.dirname(os.path.abspath(site.__file__))
-    no_global_file = os.path.join(site_mod_dir, 'no-global-site-packages.txt')
-    if running_under_virtualenv() and os.path.isfile(no_global_file):
-        return True
-    else:
-        return False
-
-
-if running_under_virtualenv():
-    src_prefix = os.path.join(sys.prefix, 'src')
-else:
-    # FIXME: keep src in cwd for now (it is not a temporary folder)
-    try:
-        src_prefix = os.path.join(os.getcwd(), 'src')
-    except OSError:
-        # In case the current working directory has been renamed or deleted
-        sys.exit(
-            "The folder you are executing pip from can no longer be found."
-        )
-
-# under macOS + virtualenv sys.prefix is not properly resolved
-# it is something like /path/to/python/bin/..
-# Note: using realpath due to tmp dirs on OSX being symlinks
-src_prefix = os.path.abspath(src_prefix)
-
-# FIXME doesn't account for venv linked to global site-packages
-
-site_packages = sysconfig.get_path("purelib")  # type: Optional[str]
-
-# This is because of a bug in PyPy's sysconfig module, see
-# https://bitbucket.org/pypy/pypy/issues/2506/sysconfig-returns-incorrect-paths
-# for more information.
-if platform.python_implementation().lower() == "pypy":
-    site_packages = distutils_sysconfig.get_python_lib()
-try:
-    # Use getusersitepackages if this is present, as it ensures that the
-    # value is initialised properly.
-    user_site = site.getusersitepackages()
-except AttributeError:
-    user_site = site.USER_SITE
-user_dir = expanduser('~')
-if WINDOWS:
-    bin_py = os.path.join(sys.prefix, 'Scripts')
-    bin_user = os.path.join(user_site, 'Scripts')
-    # buildout uses 'bin' on Windows too?
-    if not os.path.exists(bin_py):
-        bin_py = os.path.join(sys.prefix, 'bin')
-        bin_user = os.path.join(user_site, 'bin')
-
-    config_basename = 'pip.ini'
-
-    legacy_storage_dir = os.path.join(user_dir, 'pip')
-    legacy_config_file = os.path.join(
-        legacy_storage_dir,
-        config_basename,
-    )
-else:
-    bin_py = os.path.join(sys.prefix, 'bin')
-    bin_user = os.path.join(user_site, 'bin')
-
-    config_basename = 'pip.conf'
-
-    legacy_storage_dir = os.path.join(user_dir, '.pip')
-    legacy_config_file = os.path.join(
-        legacy_storage_dir,
-        config_basename,
-    )
-    # Forcing to use /usr/local/bin for standard macOS framework installs
-    # Also log to ~/Library/Logs/ for use with the Console.app log viewer
-    if sys.platform[:6] == 'darwin' and sys.prefix[:16] == '/System/Library/':
-        bin_py = '/usr/local/bin'
-
-site_config_files = [
-    os.path.join(path, config_basename)
-    for path in appdirs.site_config_dirs('pip')
-]
-
-venv_config_file = os.path.join(sys.prefix, config_basename)
-new_config_file = os.path.join(appdirs.user_config_dir("pip"), config_basename)
-
-
-def distutils_scheme(dist_name, user=False, home=None, root=None,
-                     isolated=False, prefix=None):
-    # type:(str, bool, str, str, bool, str) -> dict
-    """
-    Return a distutils install scheme
-    """
-    from distutils.dist import Distribution
-
-    scheme = {}
-
-    if isolated:
-        extra_dist_args = {"script_args": ["--no-user-cfg"]}
-    else:
-        extra_dist_args = {}
-    dist_args = {'name': dist_name}  # type: Dict[str, Union[str, List[str]]]
-    dist_args.update(extra_dist_args)
-
-    d = Distribution(dist_args)
-    # Ignoring, typeshed issue reported python/typeshed/issues/2567
-    d.parse_config_files()
-    # NOTE: Ignoring type since mypy can't find attributes on 'Command'
-    i = d.get_command_obj('install', create=True)  # type: Any
-    assert i is not None
-    # NOTE: setting user or home has the side-effect of creating the home dir
-    # or user base for installations during finalize_options()
-    # ideally, we'd prefer a scheme class that has no side-effects.
-    assert not (user and prefix), "user={} prefix={}".format(user, prefix)
-    i.user = user or i.user
-    if user:
-        i.prefix = ""
-    i.prefix = prefix or i.prefix
-    i.home = home or i.home
-    i.root = root or i.root
-    i.finalize_options()
-    for key in SCHEME_KEYS:
-        scheme[key] = getattr(i, 'install_' + key)
-
-    # install_lib specified in setup.cfg should install *everything*
-    # into there (i.e. it takes precedence over both purelib and
-    # platlib).  Note, i.install_lib is *always* set after
-    # finalize_options(); we only want to override here if the user
-    # has explicitly requested it hence going back to the config
-
-    # Ignoring, typeshed issue reported python/typeshed/issues/2567
-    if 'install_lib' in d.get_option_dict('install'):  # type: ignore
-        scheme.update(dict(purelib=i.install_lib, platlib=i.install_lib))
-
-    if running_under_virtualenv():
-        scheme['headers'] = os.path.join(
-            sys.prefix,
-            'include',
-            'site',
-            'python' + sys.version[:3],
-            dist_name,
-        )
-
-        if root is not None:
-            path_no_drive = os.path.splitdrive(
-                os.path.abspath(scheme["headers"]))[1]
-            scheme["headers"] = os.path.join(
-                root,
-                path_no_drive[1:],
-            )
-
-    return scheme
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/models/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/models/__init__.py
deleted file mode 100644
index 7855226..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/models/__init__.py
+++ /dev/null
@@ -1,2 +0,0 @@
-"""A package that contains models that represent entities.
-"""
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/models/candidate.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/models/candidate.py
deleted file mode 100644
index 4475458..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/models/candidate.py
+++ /dev/null
@@ -1,31 +0,0 @@
-from pip._vendor.packaging.version import parse as parse_version
-
-from pip._internal.utils.models import KeyBasedCompareMixin
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if MYPY_CHECK_RUNNING:
-    from pip._vendor.packaging.version import _BaseVersion  # noqa: F401
-    from pip._internal.models.link import Link  # noqa: F401
-    from typing import Any, Union  # noqa: F401
-
-
-class InstallationCandidate(KeyBasedCompareMixin):
-    """Represents a potential "candidate" for installation.
-    """
-
-    def __init__(self, project, version, location):
-        # type: (Any, str, Link) -> None
-        self.project = project
-        self.version = parse_version(version)  # type: _BaseVersion
-        self.location = location
-
-        super(InstallationCandidate, self).__init__(
-            key=(self.project, self.version, self.location),
-            defining_class=InstallationCandidate
-        )
-
-    def __repr__(self):
-        # type: () -> str
-        return "<InstallationCandidate({!r}, {!r}, {!r})>".format(
-            self.project, self.version, self.location,
-        )
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/models/format_control.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/models/format_control.py
deleted file mode 100644
index 971a391..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/models/format_control.py
+++ /dev/null
@@ -1,73 +0,0 @@
-from pip._vendor.packaging.utils import canonicalize_name
-
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if MYPY_CHECK_RUNNING:
-    from typing import Optional, Set, FrozenSet  # noqa: F401
-
-
-class FormatControl(object):
-    """Helper for managing formats from which a package can be installed.
-    """
-
-    def __init__(self, no_binary=None, only_binary=None):
-        # type: (Optional[Set], Optional[Set]) -> None
-        if no_binary is None:
-            no_binary = set()
-        if only_binary is None:
-            only_binary = set()
-
-        self.no_binary = no_binary
-        self.only_binary = only_binary
-
-    def __eq__(self, other):
-        return self.__dict__ == other.__dict__
-
-    def __ne__(self, other):
-        return not self.__eq__(other)
-
-    def __repr__(self):
-        return "{}({}, {})".format(
-            self.__class__.__name__,
-            self.no_binary,
-            self.only_binary
-        )
-
-    @staticmethod
-    def handle_mutual_excludes(value, target, other):
-        # type: (str, Optional[Set], Optional[Set]) -> None
-        new = value.split(',')
-        while ':all:' in new:
-            other.clear()
-            target.clear()
-            target.add(':all:')
-            del new[:new.index(':all:') + 1]
-            # Without a none, we want to discard everything as :all: covers it
-            if ':none:' not in new:
-                return
-        for name in new:
-            if name == ':none:':
-                target.clear()
-                continue
-            name = canonicalize_name(name)
-            other.discard(name)
-            target.add(name)
-
-    def get_allowed_formats(self, canonical_name):
-        # type: (str) -> FrozenSet
-        result = {"binary", "source"}
-        if canonical_name in self.only_binary:
-            result.discard('source')
-        elif canonical_name in self.no_binary:
-            result.discard('binary')
-        elif ':all:' in self.only_binary:
-            result.discard('source')
-        elif ':all:' in self.no_binary:
-            result.discard('binary')
-        return frozenset(result)
-
-    def disallow_binaries(self):
-        # type: () -> None
-        self.handle_mutual_excludes(
-            ':all:', self.no_binary, self.only_binary,
-        )
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/models/index.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/models/index.py
deleted file mode 100644
index ead1efb..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/models/index.py
+++ /dev/null
@@ -1,31 +0,0 @@
-from pip._vendor.six.moves.urllib import parse as urllib_parse
-
-
-class PackageIndex(object):
-    """Represents a Package Index and provides easier access to endpoints
-    """
-
-    def __init__(self, url, file_storage_domain):
-        # type: (str, str) -> None
-        super(PackageIndex, self).__init__()
-        self.url = url
-        self.netloc = urllib_parse.urlsplit(url).netloc
-        self.simple_url = self._url_for_path('simple')
-        self.pypi_url = self._url_for_path('pypi')
-
-        # This is part of a temporary hack used to block installs of PyPI
-        # packages which depend on external urls only necessary until PyPI can
-        # block such packages themselves
-        self.file_storage_domain = file_storage_domain
-
-    def _url_for_path(self, path):
-        # type: (str) -> str
-        return urllib_parse.urljoin(self.url, path)
-
-
-PyPI = PackageIndex(
-    'https://pypi.org/', file_storage_domain='files.pythonhosted.org'
-)
-TestPyPI = PackageIndex(
-    'https://test.pypi.org/', file_storage_domain='test-files.pythonhosted.org'
-)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/models/link.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/models/link.py
deleted file mode 100644
index ad2f93e..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/models/link.py
+++ /dev/null
@@ -1,163 +0,0 @@
-import posixpath
-import re
-
-from pip._vendor.six.moves.urllib import parse as urllib_parse
-
-from pip._internal.download import path_to_url
-from pip._internal.utils.misc import (
-    WHEEL_EXTENSION, redact_password_from_url, splitext,
-)
-from pip._internal.utils.models import KeyBasedCompareMixin
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if MYPY_CHECK_RUNNING:
-    from typing import Optional, Tuple, Union, Text  # noqa: F401
-    from pip._internal.index import HTMLPage  # noqa: F401
-
-
-class Link(KeyBasedCompareMixin):
-    """Represents a parsed link from a Package Index's simple URL
-    """
-
-    def __init__(self, url, comes_from=None, requires_python=None):
-        # type: (str, Optional[Union[str, HTMLPage]], Optional[str]) -> None
-        """
-        url:
-            url of the resource pointed to (href of the link)
-        comes_from:
-            instance of HTMLPage where the link was found, or string.
-        requires_python:
-            String containing the `Requires-Python` metadata field, specified
-            in PEP 345. This may be specified by a data-requires-python
-            attribute in the HTML link tag, as described in PEP 503.
-        """
-
-        # url can be a UNC windows share
-        if url.startswith('\\\\'):
-            url = path_to_url(url)
-
-        self.url = url
-        self.comes_from = comes_from
-        self.requires_python = requires_python if requires_python else None
-
-        super(Link, self).__init__(
-            key=(self.url),
-            defining_class=Link
-        )
-
-    def __str__(self):
-        if self.requires_python:
-            rp = ' (requires-python:%s)' % self.requires_python
-        else:
-            rp = ''
-        if self.comes_from:
-            return '%s (from %s)%s' % (redact_password_from_url(self.url),
-                                       self.comes_from, rp)
-        else:
-            return redact_password_from_url(str(self.url))
-
-    def __repr__(self):
-        return '<Link %s>' % self
-
-    @property
-    def filename(self):
-        # type: () -> str
-        _, netloc, path, _, _ = urllib_parse.urlsplit(self.url)
-        name = posixpath.basename(path.rstrip('/')) or netloc
-        name = urllib_parse.unquote(name)
-        assert name, ('URL %r produced no filename' % self.url)
-        return name
-
-    @property
-    def scheme(self):
-        # type: () -> str
-        return urllib_parse.urlsplit(self.url)[0]
-
-    @property
-    def netloc(self):
-        # type: () -> str
-        return urllib_parse.urlsplit(self.url)[1]
-
-    @property
-    def path(self):
-        # type: () -> str
-        return urllib_parse.unquote(urllib_parse.urlsplit(self.url)[2])
-
-    def splitext(self):
-        # type: () -> Tuple[str, str]
-        return splitext(posixpath.basename(self.path.rstrip('/')))
-
-    @property
-    def ext(self):
-        # type: () -> str
-        return self.splitext()[1]
-
-    @property
-    def url_without_fragment(self):
-        # type: () -> str
-        scheme, netloc, path, query, fragment = urllib_parse.urlsplit(self.url)
-        return urllib_parse.urlunsplit((scheme, netloc, path, query, None))
-
-    _egg_fragment_re = re.compile(r'[#&]egg=([^&]*)')
-
-    @property
-    def egg_fragment(self):
-        # type: () -> Optional[str]
-        match = self._egg_fragment_re.search(self.url)
-        if not match:
-            return None
-        return match.group(1)
-
-    _subdirectory_fragment_re = re.compile(r'[#&]subdirectory=([^&]*)')
-
-    @property
-    def subdirectory_fragment(self):
-        # type: () -> Optional[str]
-        match = self._subdirectory_fragment_re.search(self.url)
-        if not match:
-            return None
-        return match.group(1)
-
-    _hash_re = re.compile(
-        r'(sha1|sha224|sha384|sha256|sha512|md5)=([a-f0-9]+)'
-    )
-
-    @property
-    def hash(self):
-        # type: () -> Optional[str]
-        match = self._hash_re.search(self.url)
-        if match:
-            return match.group(2)
-        return None
-
-    @property
-    def hash_name(self):
-        # type: () -> Optional[str]
-        match = self._hash_re.search(self.url)
-        if match:
-            return match.group(1)
-        return None
-
-    @property
-    def show_url(self):
-        # type: () -> Optional[str]
-        return posixpath.basename(self.url.split('#', 1)[0].split('?', 1)[0])
-
-    @property
-    def is_wheel(self):
-        # type: () -> bool
-        return self.ext == WHEEL_EXTENSION
-
-    @property
-    def is_artifact(self):
-        # type: () -> bool
-        """
-        Determines if this points to an actual artifact (e.g. a tarball) or if
-        it points to an "abstract" thing like a path or a VCS location.
-        """
-        from pip._internal.vcs import vcs
-
-        if self.scheme in vcs.all_schemes:
-            return False
-
-        return True
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/__init__.py
deleted file mode 100644
index e69de29..0000000
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/check.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/check.py
deleted file mode 100644
index 0b56eda..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/check.py
+++ /dev/null
@@ -1,155 +0,0 @@
-"""Validation of dependencies of packages
-"""
-
-import logging
-from collections import namedtuple
-
-from pip._vendor.packaging.utils import canonicalize_name
-from pip._vendor.pkg_resources import RequirementParseError
-
-from pip._internal.operations.prepare import make_abstract_dist
-from pip._internal.utils.misc import get_installed_distributions
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-logger = logging.getLogger(__name__)
-
-if MYPY_CHECK_RUNNING:
-    from pip._internal.req.req_install import InstallRequirement  # noqa: F401
-    from typing import (  # noqa: F401
-        Any, Callable, Dict, Optional, Set, Tuple, List
-    )
-
-    # Shorthands
-    PackageSet = Dict[str, 'PackageDetails']
-    Missing = Tuple[str, Any]
-    Conflicting = Tuple[str, str, Any]
-
-    MissingDict = Dict[str, List[Missing]]
-    ConflictingDict = Dict[str, List[Conflicting]]
-    CheckResult = Tuple[MissingDict, ConflictingDict]
-
-PackageDetails = namedtuple('PackageDetails', ['version', 'requires'])
-
-
-def create_package_set_from_installed(**kwargs):
-    # type: (**Any) -> Tuple[PackageSet, bool]
-    """Converts a list of distributions into a PackageSet.
-    """
-    # Default to using all packages installed on the system
-    if kwargs == {}:
-        kwargs = {"local_only": False, "skip": ()}
-
-    package_set = {}
-    problems = False
-    for dist in get_installed_distributions(**kwargs):
-        name = canonicalize_name(dist.project_name)
-        try:
-            package_set[name] = PackageDetails(dist.version, dist.requires())
-        except RequirementParseError as e:
-            # Don't crash on broken metadata
-            logging.warning("Error parsing requirements for %s: %s", name, e)
-            problems = True
-    return package_set, problems
-
-
-def check_package_set(package_set, should_ignore=None):
-    # type: (PackageSet, Optional[Callable[[str], bool]]) -> CheckResult
-    """Check if a package set is consistent
-
-    If should_ignore is passed, it should be a callable that takes a
-    package name and returns a boolean.
-    """
-    if should_ignore is None:
-        def should_ignore(name):
-            return False
-
-    missing = dict()
-    conflicting = dict()
-
-    for package_name in package_set:
-        # Info about dependencies of package_name
-        missing_deps = set()  # type: Set[Missing]
-        conflicting_deps = set()  # type: Set[Conflicting]
-
-        if should_ignore(package_name):
-            continue
-
-        for req in package_set[package_name].requires:
-            name = canonicalize_name(req.project_name)  # type: str
-
-            # Check if it's missing
-            if name not in package_set:
-                missed = True
-                if req.marker is not None:
-                    missed = req.marker.evaluate()
-                if missed:
-                    missing_deps.add((name, req))
-                continue
-
-            # Check if there's a conflict
-            version = package_set[name].version  # type: str
-            if not req.specifier.contains(version, prereleases=True):
-                conflicting_deps.add((name, version, req))
-
-        if missing_deps:
-            missing[package_name] = sorted(missing_deps, key=str)
-        if conflicting_deps:
-            conflicting[package_name] = sorted(conflicting_deps, key=str)
-
-    return missing, conflicting
-
-
-def check_install_conflicts(to_install):
-    # type: (List[InstallRequirement]) -> Tuple[PackageSet, CheckResult]
-    """For checking if the dependency graph would be consistent after \
-    installing given requirements
-    """
-    # Start from the current state
-    package_set, _ = create_package_set_from_installed()
-    # Install packages
-    would_be_installed = _simulate_installation_of(to_install, package_set)
-
-    # Only warn about directly-dependent packages; create a whitelist of them
-    whitelist = _create_whitelist(would_be_installed, package_set)
-
-    return (
-        package_set,
-        check_package_set(
-            package_set, should_ignore=lambda name: name not in whitelist
-        )
-    )
-
-
-def _simulate_installation_of(to_install, package_set):
-    # type: (List[InstallRequirement], PackageSet) -> Set[str]
-    """Computes the version of packages after installing to_install.
-    """
-
-    # Keep track of packages that were installed
-    installed = set()
-
-    # Modify it as installing requirement_set would (assuming no errors)
-    for inst_req in to_install:
-        dist = make_abstract_dist(inst_req).dist()
-        name = canonicalize_name(dist.key)
-        package_set[name] = PackageDetails(dist.version, dist.requires())
-
-        installed.add(name)
-
-    return installed
-
-
-def _create_whitelist(would_be_installed, package_set):
-    # type: (Set[str], PackageSet) -> Set[str]
-    packages_affected = set(would_be_installed)
-
-    for package_name in package_set:
-        if package_name in packages_affected:
-            continue
-
-        for req in package_set[package_name].requires:
-            if canonicalize_name(req.name) in packages_affected:
-                packages_affected.add(package_name)
-                break
-
-    return packages_affected
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/freeze.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/freeze.py
deleted file mode 100644
index 388bb73..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/freeze.py
+++ /dev/null
@@ -1,247 +0,0 @@
-from __future__ import absolute_import
-
-import collections
-import logging
-import os
-import re
-
-from pip._vendor import six
-from pip._vendor.packaging.utils import canonicalize_name
-from pip._vendor.pkg_resources import RequirementParseError
-
-from pip._internal.exceptions import BadCommand, InstallationError
-from pip._internal.req.constructors import (
-    install_req_from_editable, install_req_from_line,
-)
-from pip._internal.req.req_file import COMMENT_RE
-from pip._internal.utils.misc import (
-    dist_is_editable, get_installed_distributions,
-)
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if MYPY_CHECK_RUNNING:
-    from typing import (  # noqa: F401
-        Iterator, Optional, List, Container, Set, Dict, Tuple, Iterable, Union
-    )
-    from pip._internal.cache import WheelCache  # noqa: F401
-    from pip._vendor.pkg_resources import (  # noqa: F401
-        Distribution, Requirement
-    )
-
-    RequirementInfo = Tuple[Optional[Union[str, Requirement]], bool, List[str]]
-
-
-logger = logging.getLogger(__name__)
-
-
-def freeze(
-    requirement=None,  # type: Optional[List[str]]
-    find_links=None,  # type: Optional[List[str]]
-    local_only=None,  # type: Optional[bool]
-    user_only=None,  # type: Optional[bool]
-    skip_regex=None,  # type: Optional[str]
-    isolated=False,  # type: bool
-    wheel_cache=None,  # type: Optional[WheelCache]
-    exclude_editable=False,  # type: bool
-    skip=()  # type: Container[str]
-):
-    # type: (...) -> Iterator[str]
-    find_links = find_links or []
-    skip_match = None
-
-    if skip_regex:
-        skip_match = re.compile(skip_regex).search
-
-    for link in find_links:
-        yield '-f %s' % link
-    installations = {}  # type: Dict[str, FrozenRequirement]
-    for dist in get_installed_distributions(local_only=local_only,
-                                            skip=(),
-                                            user_only=user_only):
-        try:
-            req = FrozenRequirement.from_dist(dist)
-        except RequirementParseError:
-            logger.warning(
-                "Could not parse requirement: %s",
-                dist.project_name
-            )
-            continue
-        if exclude_editable and req.editable:
-            continue
-        installations[req.name] = req
-
-    if requirement:
-        # the options that don't get turned into an InstallRequirement
-        # should only be emitted once, even if the same option is in multiple
-        # requirements files, so we need to keep track of what has been emitted
-        # so that we don't emit it again if it's seen again
-        emitted_options = set()  # type: Set[str]
-        # keep track of which files a requirement is in so that we can
-        # give an accurate warning if a requirement appears multiple times.
-        req_files = collections.defaultdict(list)  # type: Dict[str, List[str]]
-        for req_file_path in requirement:
-            with open(req_file_path) as req_file:
-                for line in req_file:
-                    if (not line.strip() or
-                            line.strip().startswith('#') or
-                            (skip_match and skip_match(line)) or
-                            line.startswith((
-                                '-r', '--requirement',
-                                '-Z', '--always-unzip',
-                                '-f', '--find-links',
-                                '-i', '--index-url',
-                                '--pre',
-                                '--trusted-host',
-                                '--process-dependency-links',
-                                '--extra-index-url'))):
-                        line = line.rstrip()
-                        if line not in emitted_options:
-                            emitted_options.add(line)
-                            yield line
-                        continue
-
-                    if line.startswith('-e') or line.startswith('--editable'):
-                        if line.startswith('-e'):
-                            line = line[2:].strip()
-                        else:
-                            line = line[len('--editable'):].strip().lstrip('=')
-                        line_req = install_req_from_editable(
-                            line,
-                            isolated=isolated,
-                            wheel_cache=wheel_cache,
-                        )
-                    else:
-                        line_req = install_req_from_line(
-                            COMMENT_RE.sub('', line).strip(),
-                            isolated=isolated,
-                            wheel_cache=wheel_cache,
-                        )
-
-                    if not line_req.name:
-                        logger.info(
-                            "Skipping line in requirement file [%s] because "
-                            "it's not clear what it would install: %s",
-                            req_file_path, line.strip(),
-                        )
-                        logger.info(
-                            "  (add #egg=PackageName to the URL to avoid"
-                            " this warning)"
-                        )
-                    elif line_req.name not in installations:
-                        # either it's not installed, or it is installed
-                        # but has been processed already
-                        if not req_files[line_req.name]:
-                            logger.warning(
-                                "Requirement file [%s] contains %s, but "
-                                "package %r is not installed",
-                                req_file_path,
-                                COMMENT_RE.sub('', line).strip(), line_req.name
-                            )
-                        else:
-                            req_files[line_req.name].append(req_file_path)
-                    else:
-                        yield str(installations[line_req.name]).rstrip()
-                        del installations[line_req.name]
-                        req_files[line_req.name].append(req_file_path)
-
-        # Warn about requirements that were included multiple times (in a
-        # single requirements file or in different requirements files).
-        for name, files in six.iteritems(req_files):
-            if len(files) > 1:
-                logger.warning("Requirement %s included multiple times [%s]",
-                               name, ', '.join(sorted(set(files))))
-
-        yield(
-            '## The following requirements were added by '
-            'pip freeze:'
-        )
-    for installation in sorted(
-            installations.values(), key=lambda x: x.name.lower()):
-        if canonicalize_name(installation.name) not in skip:
-            yield str(installation).rstrip()
-
-
-def get_requirement_info(dist):
-    # type: (Distribution) -> RequirementInfo
-    """
-    Compute and return values (req, editable, comments) for use in
-    FrozenRequirement.from_dist().
-    """
-    if not dist_is_editable(dist):
-        return (None, False, [])
-
-    location = os.path.normcase(os.path.abspath(dist.location))
-
-    from pip._internal.vcs import vcs, RemoteNotFoundError
-    vc_type = vcs.get_backend_type(location)
-
-    if not vc_type:
-        req = dist.as_requirement()
-        logger.debug(
-            'No VCS found for editable requirement {!r} in: {!r}', req,
-            location,
-        )
-        comments = [
-            '# Editable install with no version control ({})'.format(req)
-        ]
-        return (location, True, comments)
-
-    try:
-        req = vc_type.get_src_requirement(location, dist.project_name)
-    except RemoteNotFoundError:
-        req = dist.as_requirement()
-        comments = [
-            '# Editable {} install with no remote ({})'.format(
-                vc_type.__name__, req,
-            )
-        ]
-        return (location, True, comments)
-
-    except BadCommand:
-        logger.warning(
-            'cannot determine version of editable source in %s '
-            '(%s command not found in path)',
-            location,
-            vc_type.name,
-        )
-        return (None, True, [])
-
-    except InstallationError as exc:
-        logger.warning(
-            "Error when trying to get requirement for VCS system %s, "
-            "falling back to uneditable format", exc
-        )
-    else:
-        if req is not None:
-            return (req, True, [])
-
-    logger.warning(
-        'Could not determine repository location of %s', location
-    )
-    comments = ['## !! Could not determine repository location']
-
-    return (None, False, comments)
-
-
-class FrozenRequirement(object):
-    def __init__(self, name, req, editable, comments=()):
-        # type: (str, Union[str, Requirement], bool, Iterable[str]) -> None
-        self.name = name
-        self.req = req
-        self.editable = editable
-        self.comments = comments
-
-    @classmethod
-    def from_dist(cls, dist):
-        # type: (Distribution) -> FrozenRequirement
-        req, editable, comments = get_requirement_info(dist)
-        if req is None:
-            req = dist.as_requirement()
-
-        return cls(dist.project_name, req, editable, comments=comments)
-
-    def __str__(self):
-        req = self.req
-        if self.editable:
-            req = '-e %s' % req
-        return '\n'.join(list(self.comments) + [str(req)]) + '\n'
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/prepare.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/prepare.py
deleted file mode 100644
index 4f31dd5..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/prepare.py
+++ /dev/null
@@ -1,413 +0,0 @@
-"""Prepares a distribution for installation
-"""
-
-import logging
-import os
-
-from pip._vendor import pkg_resources, requests
-
-from pip._internal.build_env import BuildEnvironment
-from pip._internal.download import (
-    is_dir_url, is_file_url, is_vcs_url, unpack_url, url_to_path,
-)
-from pip._internal.exceptions import (
-    DirectoryUrlHashUnsupported, HashUnpinned, InstallationError,
-    PreviousBuildDirError, VcsHashUnsupported,
-)
-from pip._internal.utils.compat import expanduser
-from pip._internal.utils.hashes import MissingHashes
-from pip._internal.utils.logging import indent_log
-from pip._internal.utils.misc import display_path, normalize_path
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-from pip._internal.vcs import vcs
-
-if MYPY_CHECK_RUNNING:
-    from typing import Any, Optional  # noqa: F401
-    from pip._internal.req.req_install import InstallRequirement  # noqa: F401
-    from pip._internal.index import PackageFinder  # noqa: F401
-    from pip._internal.download import PipSession  # noqa: F401
-    from pip._internal.req.req_tracker import RequirementTracker  # noqa: F401
-
-logger = logging.getLogger(__name__)
-
-
-def make_abstract_dist(req):
-    # type: (InstallRequirement) -> DistAbstraction
-    """Factory to make an abstract dist object.
-
-    Preconditions: Either an editable req with a source_dir, or satisfied_by or
-    a wheel link, or a non-editable req with a source_dir.
-
-    :return: A concrete DistAbstraction.
-    """
-    if req.editable:
-        return IsSDist(req)
-    elif req.link and req.link.is_wheel:
-        return IsWheel(req)
-    else:
-        return IsSDist(req)
-
-
-class DistAbstraction(object):
-    """Abstracts out the wheel vs non-wheel Resolver.resolve() logic.
-
-    The requirements for anything installable are as follows:
-     - we must be able to determine the requirement name
-       (or we can't correctly handle the non-upgrade case).
-     - we must be able to generate a list of run-time dependencies
-       without installing any additional packages (or we would
-       have to either burn time by doing temporary isolated installs
-       or alternatively violate pips 'don't start installing unless
-       all requirements are available' rule - neither of which are
-       desirable).
-     - for packages with setup requirements, we must also be able
-       to determine their requirements without installing additional
-       packages (for the same reason as run-time dependencies)
-     - we must be able to create a Distribution object exposing the
-       above metadata.
-    """
-
-    def __init__(self, req):
-        # type: (InstallRequirement) -> None
-        self.req = req  # type: InstallRequirement
-
-    def dist(self):
-        # type: () -> Any
-        """Return a setuptools Dist object."""
-        raise NotImplementedError
-
-    def prep_for_dist(self, finder, build_isolation):
-        # type: (PackageFinder, bool) -> Any
-        """Ensure that we can get a Dist for this requirement."""
-        raise NotImplementedError
-
-
-class IsWheel(DistAbstraction):
-
-    def dist(self):
-        # type: () -> pkg_resources.Distribution
-        return list(pkg_resources.find_distributions(
-            self.req.source_dir))[0]
-
-    def prep_for_dist(self, finder, build_isolation):
-        # type: (PackageFinder, bool) -> Any
-        # FIXME:https://github.com/pypa/pip/issues/1112
-        pass
-
-
-class IsSDist(DistAbstraction):
-
-    def dist(self):
-        return self.req.get_dist()
-
-    def prep_for_dist(self, finder, build_isolation):
-        # type: (PackageFinder, bool) -> None
-        # Prepare for building. We need to:
-        #   1. Load pyproject.toml (if it exists)
-        #   2. Set up the build environment
-
-        self.req.load_pyproject_toml()
-        should_isolate = self.req.use_pep517 and build_isolation
-
-        def _raise_conflicts(conflicting_with, conflicting_reqs):
-            raise InstallationError(
-                "Some build dependencies for %s conflict with %s: %s." % (
-                    self.req, conflicting_with, ', '.join(
-                        '%s is incompatible with %s' % (installed, wanted)
-                        for installed, wanted in sorted(conflicting))))
-
-        if should_isolate:
-            # Isolate in a BuildEnvironment and install the build-time
-            # requirements.
-            self.req.build_env = BuildEnvironment()
-            self.req.build_env.install_requirements(
-                finder, self.req.pyproject_requires, 'overlay',
-                "Installing build dependencies"
-            )
-            conflicting, missing = self.req.build_env.check_requirements(
-                self.req.requirements_to_check
-            )
-            if conflicting:
-                _raise_conflicts("PEP 517/518 supported requirements",
-                                 conflicting)
-            if missing:
-                logger.warning(
-                    "Missing build requirements in pyproject.toml for %s.",
-                    self.req,
-                )
-                logger.warning(
-                    "The project does not specify a build backend, and "
-                    "pip cannot fall back to setuptools without %s.",
-                    " and ".join(map(repr, sorted(missing)))
-                )
-            # Install any extra build dependencies that the backend requests.
-            # This must be done in a second pass, as the pyproject.toml
-            # dependencies must be installed before we can call the backend.
-            with self.req.build_env:
-                # We need to have the env active when calling the hook.
-                self.req.spin_message = "Getting requirements to build wheel"
-                reqs = self.req.pep517_backend.get_requires_for_build_wheel()
-            conflicting, missing = self.req.build_env.check_requirements(reqs)
-            if conflicting:
-                _raise_conflicts("the backend dependencies", conflicting)
-            self.req.build_env.install_requirements(
-                finder, missing, 'normal',
-                "Installing backend dependencies"
-            )
-
-        self.req.prepare_metadata()
-        self.req.assert_source_matches_version()
-
-
-class Installed(DistAbstraction):
-
-    def dist(self):
-        # type: () -> pkg_resources.Distribution
-        return self.req.satisfied_by
-
-    def prep_for_dist(self, finder, build_isolation):
-        # type: (PackageFinder, bool) -> Any
-        pass
-
-
-class RequirementPreparer(object):
-    """Prepares a Requirement
-    """
-
-    def __init__(
-        self,
-        build_dir,  # type: str
-        download_dir,  # type: Optional[str]
-        src_dir,  # type: str
-        wheel_download_dir,  # type: Optional[str]
-        progress_bar,  # type: str
-        build_isolation,  # type: bool
-        req_tracker  # type: RequirementTracker
-    ):
-        # type: (...) -> None
-        super(RequirementPreparer, self).__init__()
-
-        self.src_dir = src_dir
-        self.build_dir = build_dir
-        self.req_tracker = req_tracker
-
-        # Where still packed archives should be written to. If None, they are
-        # not saved, and are deleted immediately after unpacking.
-        self.download_dir = download_dir
-
-        # Where still-packed .whl files should be written to. If None, they are
-        # written to the download_dir parameter. Separate to download_dir to
-        # permit only keeping wheel archives for pip wheel.
-        if wheel_download_dir:
-            wheel_download_dir = normalize_path(wheel_download_dir)
-        self.wheel_download_dir = wheel_download_dir
-
-        # NOTE
-        # download_dir and wheel_download_dir overlap semantically and may
-        # be combined if we're willing to have non-wheel archives present in
-        # the wheelhouse output by 'pip wheel'.
-
-        self.progress_bar = progress_bar
-
-        # Is build isolation allowed?
-        self.build_isolation = build_isolation
-
-    @property
-    def _download_should_save(self):
-        # type: () -> bool
-        # TODO: Modify to reduce indentation needed
-        if self.download_dir:
-            self.download_dir = expanduser(self.download_dir)
-            if os.path.exists(self.download_dir):
-                return True
-            else:
-                logger.critical('Could not find download directory')
-                raise InstallationError(
-                    "Could not find or access download directory '%s'"
-                    % display_path(self.download_dir))
-        return False
-
-    def prepare_linked_requirement(
-        self,
-        req,  # type: InstallRequirement
-        session,  # type: PipSession
-        finder,  # type: PackageFinder
-        upgrade_allowed,  # type: bool
-        require_hashes  # type: bool
-    ):
-        # type: (...) -> DistAbstraction
-        """Prepare a requirement that would be obtained from req.link
-        """
-        # TODO: Breakup into smaller functions
-        if req.link and req.link.scheme == 'file':
-            path = url_to_path(req.link.url)
-            logger.info('Processing %s', display_path(path))
-        else:
-            logger.info('Collecting %s', req)
-
-        with indent_log():
-            # @@ if filesystem packages are not marked
-            # editable in a req, a non deterministic error
-            # occurs when the script attempts to unpack the
-            # build directory
-            req.ensure_has_source_dir(self.build_dir)
-            # If a checkout exists, it's unwise to keep going.  version
-            # inconsistencies are logged later, but do not fail the
-            # installation.
-            # FIXME: this won't upgrade when there's an existing
-            # package unpacked in `req.source_dir`
-            # package unpacked in `req.source_dir`
-            if os.path.exists(os.path.join(req.source_dir, 'setup.py')):
-                raise PreviousBuildDirError(
-                    "pip can't proceed with requirements '%s' due to a"
-                    " pre-existing build directory (%s). This is "
-                    "likely due to a previous installation that failed"
-                    ". pip is being responsible and not assuming it "
-                    "can delete this. Please delete it and try again."
-                    % (req, req.source_dir)
-                )
-            req.populate_link(finder, upgrade_allowed, require_hashes)
-
-            # We can't hit this spot and have populate_link return None.
-            # req.satisfied_by is None here (because we're
-            # guarded) and upgrade has no impact except when satisfied_by
-            # is not None.
-            # Then inside find_requirement existing_applicable -> False
-            # If no new versions are found, DistributionNotFound is raised,
-            # otherwise a result is guaranteed.
-            assert req.link
-            link = req.link
-
-            # Now that we have the real link, we can tell what kind of
-            # requirements we have and raise some more informative errors
-            # than otherwise. (For example, we can raise VcsHashUnsupported
-            # for a VCS URL rather than HashMissing.)
-            if require_hashes:
-                # We could check these first 2 conditions inside
-                # unpack_url and save repetition of conditions, but then
-                # we would report less-useful error messages for
-                # unhashable requirements, complaining that there's no
-                # hash provided.
-                if is_vcs_url(link):
-                    raise VcsHashUnsupported()
-                elif is_file_url(link) and is_dir_url(link):
-                    raise DirectoryUrlHashUnsupported()
-                if not req.original_link and not req.is_pinned:
-                    # Unpinned packages are asking for trouble when a new
-                    # version is uploaded. This isn't a security check, but
-                    # it saves users a surprising hash mismatch in the
-                    # future.
-                    #
-                    # file:/// URLs aren't pinnable, so don't complain
-                    # about them not being pinned.
-                    raise HashUnpinned()
-
-            hashes = req.hashes(trust_internet=not require_hashes)
-            if require_hashes and not hashes:
-                # Known-good hashes are missing for this requirement, so
-                # shim it with a facade object that will provoke hash
-                # computation and then raise a HashMissing exception
-                # showing the user what the hash should be.
-                hashes = MissingHashes()
-
-            try:
-                download_dir = self.download_dir
-                # We always delete unpacked sdists after pip ran.
-                autodelete_unpacked = True
-                if req.link.is_wheel and self.wheel_download_dir:
-                    # when doing 'pip wheel` we download wheels to a
-                    # dedicated dir.
-                    download_dir = self.wheel_download_dir
-                if req.link.is_wheel:
-                    if download_dir:
-                        # When downloading, we only unpack wheels to get
-                        # metadata.
-                        autodelete_unpacked = True
-                    else:
-                        # When installing a wheel, we use the unpacked
-                        # wheel.
-                        autodelete_unpacked = False
-                unpack_url(
-                    req.link, req.source_dir,
-                    download_dir, autodelete_unpacked,
-                    session=session, hashes=hashes,
-                    progress_bar=self.progress_bar
-                )
-            except requests.HTTPError as exc:
-                logger.critical(
-                    'Could not install requirement %s because of error %s',
-                    req,
-                    exc,
-                )
-                raise InstallationError(
-                    'Could not install requirement %s because of HTTP '
-                    'error %s for URL %s' %
-                    (req, exc, req.link)
-                )
-            abstract_dist = make_abstract_dist(req)
-            with self.req_tracker.track(req):
-                abstract_dist.prep_for_dist(finder, self.build_isolation)
-            if self._download_should_save:
-                # Make a .zip of the source_dir we already created.
-                if req.link.scheme in vcs.all_schemes:
-                    req.archive(self.download_dir)
-        return abstract_dist
-
-    def prepare_editable_requirement(
-        self,
-        req,  # type: InstallRequirement
-        require_hashes,  # type: bool
-        use_user_site,  # type: bool
-        finder  # type: PackageFinder
-    ):
-        # type: (...) -> DistAbstraction
-        """Prepare an editable requirement
-        """
-        assert req.editable, "cannot prepare a non-editable req as editable"
-
-        logger.info('Obtaining %s', req)
-
-        with indent_log():
-            if require_hashes:
-                raise InstallationError(
-                    'The editable requirement %s cannot be installed when '
-                    'requiring hashes, because there is no single file to '
-                    'hash.' % req
-                )
-            req.ensure_has_source_dir(self.src_dir)
-            req.update_editable(not self._download_should_save)
-
-            abstract_dist = make_abstract_dist(req)
-            with self.req_tracker.track(req):
-                abstract_dist.prep_for_dist(finder, self.build_isolation)
-
-            if self._download_should_save:
-                req.archive(self.download_dir)
-            req.check_if_exists(use_user_site)
-
-        return abstract_dist
-
-    def prepare_installed_requirement(self, req, require_hashes, skip_reason):
-        # type: (InstallRequirement, bool, Optional[str]) -> DistAbstraction
-        """Prepare an already-installed requirement
-        """
-        assert req.satisfied_by, "req should have been satisfied but isn't"
-        assert skip_reason is not None, (
-            "did not get skip reason skipped but req.satisfied_by "
-            "is set to %r" % (req.satisfied_by,)
-        )
-        logger.info(
-            'Requirement %s: %s (%s)',
-            skip_reason, req, req.satisfied_by.version
-        )
-        with indent_log():
-            if require_hashes:
-                logger.debug(
-                    'Since it is already installed, we are trusting this '
-                    'package without checking its hash. To ensure a '
-                    'completely repeatable environment, install into an '
-                    'empty virtualenv.'
-                )
-            abstract_dist = Installed(req)
-
-        return abstract_dist
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/pep425tags.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/pep425tags.py
deleted file mode 100644
index 1e782d1..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/pep425tags.py
+++ /dev/null
@@ -1,381 +0,0 @@
-"""Generate and work with PEP 425 Compatibility Tags."""
-from __future__ import absolute_import
-
-import distutils.util
-import logging
-import platform
-import re
-import sys
-import sysconfig
-import warnings
-from collections import OrderedDict
-
-import pip._internal.utils.glibc
-from pip._internal.utils.compat import get_extension_suffixes
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if MYPY_CHECK_RUNNING:
-    from typing import (  # noqa: F401
-        Tuple, Callable, List, Optional, Union, Dict
-    )
-
-    Pep425Tag = Tuple[str, str, str]
-
-logger = logging.getLogger(__name__)
-
-_osx_arch_pat = re.compile(r'(.+)_(\d+)_(\d+)_(.+)')
-
-
-def get_config_var(var):
-    # type: (str) -> Optional[str]
-    try:
-        return sysconfig.get_config_var(var)
-    except IOError as e:  # Issue #1074
-        warnings.warn("{}".format(e), RuntimeWarning)
-        return None
-
-
-def get_abbr_impl():
-    # type: () -> str
-    """Return abbreviated implementation name."""
-    if hasattr(sys, 'pypy_version_info'):
-        pyimpl = 'pp'
-    elif sys.platform.startswith('java'):
-        pyimpl = 'jy'
-    elif sys.platform == 'cli':
-        pyimpl = 'ip'
-    else:
-        pyimpl = 'cp'
-    return pyimpl
-
-
-def get_impl_ver():
-    # type: () -> str
-    """Return implementation version."""
-    impl_ver = get_config_var("py_version_nodot")
-    if not impl_ver or get_abbr_impl() == 'pp':
-        impl_ver = ''.join(map(str, get_impl_version_info()))
-    return impl_ver
-
-
-def get_impl_version_info():
-    # type: () -> Tuple[int, ...]
-    """Return sys.version_info-like tuple for use in decrementing the minor
-    version."""
-    if get_abbr_impl() == 'pp':
-        # as per https://github.com/pypa/pip/issues/2882
-        # attrs exist only on pypy
-        return (sys.version_info[0],
-                sys.pypy_version_info.major,  # type: ignore
-                sys.pypy_version_info.minor)  # type: ignore
-    else:
-        return sys.version_info[0], sys.version_info[1]
-
-
-def get_impl_tag():
-    # type: () -> str
-    """
-    Returns the Tag for this specific implementation.
-    """
-    return "{}{}".format(get_abbr_impl(), get_impl_ver())
-
-
-def get_flag(var, fallback, expected=True, warn=True):
-    # type: (str, Callable[..., bool], Union[bool, int], bool) -> bool
-    """Use a fallback method for determining SOABI flags if the needed config
-    var is unset or unavailable."""
-    val = get_config_var(var)
-    if val is None:
-        if warn:
-            logger.debug("Config variable '%s' is unset, Python ABI tag may "
-                         "be incorrect", var)
-        return fallback()
-    return val == expected
-
-
-def get_abi_tag():
-    # type: () -> Optional[str]
-    """Return the ABI tag based on SOABI (if available) or emulate SOABI
-    (CPython 2, PyPy)."""
-    soabi = get_config_var('SOABI')
-    impl = get_abbr_impl()
-    if not soabi and impl in {'cp', 'pp'} and hasattr(sys, 'maxunicode'):
-        d = ''
-        m = ''
-        u = ''
-        if get_flag('Py_DEBUG',
-                    lambda: hasattr(sys, 'gettotalrefcount'),
-                    warn=(impl == 'cp')):
-            d = 'd'
-        if get_flag('WITH_PYMALLOC',
-                    lambda: impl == 'cp',
-                    warn=(impl == 'cp')):
-            m = 'm'
-        if get_flag('Py_UNICODE_SIZE',
-                    lambda: sys.maxunicode == 0x10ffff,
-                    expected=4,
-                    warn=(impl == 'cp' and
-                          sys.version_info < (3, 3))) \
-                and sys.version_info < (3, 3):
-            u = 'u'
-        abi = '%s%s%s%s%s' % (impl, get_impl_ver(), d, m, u)
-    elif soabi and soabi.startswith('cpython-'):
-        abi = 'cp' + soabi.split('-')[1]
-    elif soabi:
-        abi = soabi.replace('.', '_').replace('-', '_')
-    else:
-        abi = None
-    return abi
-
-
-def _is_running_32bit():
-    # type: () -> bool
-    return sys.maxsize == 2147483647
-
-
-def get_platform():
-    # type: () -> str
-    """Return our platform name 'win32', 'linux_x86_64'"""
-    if sys.platform == 'darwin':
-        # distutils.util.get_platform() returns the release based on the value
-        # of MACOSX_DEPLOYMENT_TARGET on which Python was built, which may
-        # be significantly older than the user's current machine.
-        release, _, machine = platform.mac_ver()
-        split_ver = release.split('.')
-
-        if machine == "x86_64" and _is_running_32bit():
-            machine = "i386"
-        elif machine == "ppc64" and _is_running_32bit():
-            machine = "ppc"
-
-        return 'macosx_{}_{}_{}'.format(split_ver[0], split_ver[1], machine)
-
-    # XXX remove distutils dependency
-    result = distutils.util.get_platform().replace('.', '_').replace('-', '_')
-    if result == "linux_x86_64" and _is_running_32bit():
-        # 32 bit Python program (running on a 64 bit Linux): pip should only
-        # install and run 32 bit compiled extensions in that case.
-        result = "linux_i686"
-
-    return result
-
-
-def is_manylinux1_compatible():
-    # type: () -> bool
-    # Only Linux, and only x86-64 / i686
-    if get_platform() not in {"linux_x86_64", "linux_i686"}:
-        return False
-
-    # Check for presence of _manylinux module
-    try:
-        import _manylinux
-        return bool(_manylinux.manylinux1_compatible)
-    except (ImportError, AttributeError):
-        # Fall through to heuristic check below
-        pass
-
-    # Check glibc version. CentOS 5 uses glibc 2.5.
-    return pip._internal.utils.glibc.have_compatible_glibc(2, 5)
-
-
-def is_manylinux2010_compatible():
-    # type: () -> bool
-    # Only Linux, and only x86-64 / i686
-    if get_platform() not in {"linux_x86_64", "linux_i686"}:
-        return False
-
-    # Check for presence of _manylinux module
-    try:
-        import _manylinux
-        return bool(_manylinux.manylinux2010_compatible)
-    except (ImportError, AttributeError):
-        # Fall through to heuristic check below
-        pass
-
-    # Check glibc version. CentOS 6 uses glibc 2.12.
-    return pip._internal.utils.glibc.have_compatible_glibc(2, 12)
-
-
-def get_darwin_arches(major, minor, machine):
-    # type: (int, int, str) -> List[str]
-    """Return a list of supported arches (including group arches) for
-    the given major, minor and machine architecture of an macOS machine.
-    """
-    arches = []
-
-    def _supports_arch(major, minor, arch):
-        # type: (int, int, str) -> bool
-        # Looking at the application support for macOS versions in the chart
-        # provided by https://en.wikipedia.org/wiki/OS_X#Versions it appears
-        # our timeline looks roughly like:
-        #
-        # 10.0 - Introduces ppc support.
-        # 10.4 - Introduces ppc64, i386, and x86_64 support, however the ppc64
-        #        and x86_64 support is CLI only, and cannot be used for GUI
-        #        applications.
-        # 10.5 - Extends ppc64 and x86_64 support to cover GUI applications.
-        # 10.6 - Drops support for ppc64
-        # 10.7 - Drops support for ppc
-        #
-        # Given that we do not know if we're installing a CLI or a GUI
-        # application, we must be conservative and assume it might be a GUI
-        # application and behave as if ppc64 and x86_64 support did not occur
-        # until 10.5.
-        #
-        # Note: The above information is taken from the "Application support"
-        #       column in the chart not the "Processor support" since I believe
-        #       that we care about what instruction sets an application can use
-        #       not which processors the OS supports.
-        if arch == 'ppc':
-            return (major, minor) <= (10, 5)
-        if arch == 'ppc64':
-            return (major, minor) == (10, 5)
-        if arch == 'i386':
-            return (major, minor) >= (10, 4)
-        if arch == 'x86_64':
-            return (major, minor) >= (10, 5)
-        if arch in groups:
-            for garch in groups[arch]:
-                if _supports_arch(major, minor, garch):
-                    return True
-        return False
-
-    groups = OrderedDict([
-        ("fat", ("i386", "ppc")),
-        ("intel", ("x86_64", "i386")),
-        ("fat64", ("x86_64", "ppc64")),
-        ("fat32", ("x86_64", "i386", "ppc")),
-    ])  # type: Dict[str, Tuple[str, ...]]
-
-    if _supports_arch(major, minor, machine):
-        arches.append(machine)
-
-    for garch in groups:
-        if machine in groups[garch] and _supports_arch(major, minor, garch):
-            arches.append(garch)
-
-    arches.append('universal')
-
-    return arches
-
-
-def get_all_minor_versions_as_strings(version_info):
-    # type: (Tuple[int, ...]) -> List[str]
-    versions = []
-    major = version_info[:-1]
-    # Support all previous minor Python versions.
-    for minor in range(version_info[-1], -1, -1):
-        versions.append(''.join(map(str, major + (minor,))))
-    return versions
-
-
-def get_supported(
-    versions=None,  # type: Optional[List[str]]
-    noarch=False,  # type: bool
-    platform=None,  # type: Optional[str]
-    impl=None,  # type: Optional[str]
-    abi=None  # type: Optional[str]
-):
-    # type: (...) -> List[Pep425Tag]
-    """Return a list of supported tags for each version specified in
-    `versions`.
-
-    :param versions: a list of string versions, of the form ["33", "32"],
-        or None. The first version will be assumed to support our ABI.
-    :param platform: specify the exact platform you want valid
-        tags for, or None. If None, use the local system platform.
-    :param impl: specify the exact implementation you want valid
-        tags for, or None. If None, use the local interpreter impl.
-    :param abi: specify the exact abi you want valid
-        tags for, or None. If None, use the local interpreter abi.
-    """
-    supported = []
-
-    # Versions must be given with respect to the preference
-    if versions is None:
-        version_info = get_impl_version_info()
-        versions = get_all_minor_versions_as_strings(version_info)
-
-    impl = impl or get_abbr_impl()
-
-    abis = []  # type: List[str]
-
-    abi = abi or get_abi_tag()
-    if abi:
-        abis[0:0] = [abi]
-
-    abi3s = set()
-    for suffix in get_extension_suffixes():
-        if suffix.startswith('.abi'):
-            abi3s.add(suffix.split('.', 2)[1])
-
-    abis.extend(sorted(list(abi3s)))
-
-    abis.append('none')
-
-    if not noarch:
-        arch = platform or get_platform()
-        arch_prefix, arch_sep, arch_suffix = arch.partition('_')
-        if arch.startswith('macosx'):
-            # support macosx-10.6-intel on macosx-10.9-x86_64
-            match = _osx_arch_pat.match(arch)
-            if match:
-                name, major, minor, actual_arch = match.groups()
-                tpl = '{}_{}_%i_%s'.format(name, major)
-                arches = []
-                for m in reversed(range(int(minor) + 1)):
-                    for a in get_darwin_arches(int(major), m, actual_arch):
-                        arches.append(tpl % (m, a))
-            else:
-                # arch pattern didn't match (?!)
-                arches = [arch]
-        elif arch_prefix == 'manylinux2010':
-            # manylinux1 wheels run on most manylinux2010 systems with the
-            # exception of wheels depending on ncurses. PEP 571 states
-            # manylinux1 wheels should be considered manylinux2010 wheels:
-            # https://www.python.org/dev/peps/pep-0571/#backwards-compatibility-with-manylinux1-wheels
-            arches = [arch, 'manylinux1' + arch_sep + arch_suffix]
-        elif platform is None:
-            arches = []
-            if is_manylinux2010_compatible():
-                arches.append('manylinux2010' + arch_sep + arch_suffix)
-            if is_manylinux1_compatible():
-                arches.append('manylinux1' + arch_sep + arch_suffix)
-            arches.append(arch)
-        else:
-            arches = [arch]
-
-        # Current version, current API (built specifically for our Python):
-        for abi in abis:
-            for arch in arches:
-                supported.append(('%s%s' % (impl, versions[0]), abi, arch))
-
-        # abi3 modules compatible with older version of Python
-        for version in versions[1:]:
-            # abi3 was introduced in Python 3.2
-            if version in {'31', '30'}:
-                break
-            for abi in abi3s:   # empty set if not Python 3
-                for arch in arches:
-                    supported.append(("%s%s" % (impl, version), abi, arch))
-
-        # Has binaries, does not use the Python API:
-        for arch in arches:
-            supported.append(('py%s' % (versions[0][0]), 'none', arch))
-
-    # No abi / arch, but requires our implementation:
-    supported.append(('%s%s' % (impl, versions[0]), 'none', 'any'))
-    # Tagged specifically as being cross-version compatible
-    # (with just the major version specified)
-    supported.append(('%s%s' % (impl, versions[0][0]), 'none', 'any'))
-
-    # No abi / arch, generic Python
-    for i, version in enumerate(versions):
-        supported.append(('py%s' % (version,), 'none', 'any'))
-        if i == 0:
-            supported.append(('py%s' % (version[0]), 'none', 'any'))
-
-    return supported
-
-
-implementation_tag = get_impl_tag()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/pyproject.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/pyproject.py
deleted file mode 100644
index 8d739a6..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/pyproject.py
+++ /dev/null
@@ -1,171 +0,0 @@
-from __future__ import absolute_import
-
-import io
-import os
-import sys
-
-from pip._vendor import pytoml, six
-
-from pip._internal.exceptions import InstallationError
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if MYPY_CHECK_RUNNING:
-    from typing import Any, Tuple, Optional, List  # noqa: F401
-
-
-def _is_list_of_str(obj):
-    # type: (Any) -> bool
-    return (
-        isinstance(obj, list) and
-        all(isinstance(item, six.string_types) for item in obj)
-    )
-
-
-def make_pyproject_path(setup_py_dir):
-    # type: (str) -> str
-    path = os.path.join(setup_py_dir, 'pyproject.toml')
-
-    # Python2 __file__ should not be unicode
-    if six.PY2 and isinstance(path, six.text_type):
-        path = path.encode(sys.getfilesystemencoding())
-
-    return path
-
-
-def load_pyproject_toml(
-    use_pep517,  # type: Optional[bool]
-    pyproject_toml,  # type: str
-    setup_py,  # type: str
-    req_name  # type: str
-):
-    # type: (...) -> Optional[Tuple[List[str], str, List[str]]]
-    """Load the pyproject.toml file.
-
-    Parameters:
-        use_pep517 - Has the user requested PEP 517 processing? None
-                     means the user hasn't explicitly specified.
-        pyproject_toml - Location of the project's pyproject.toml file
-        setup_py - Location of the project's setup.py file
-        req_name - The name of the requirement we're processing (for
-                   error reporting)
-
-    Returns:
-        None if we should use the legacy code path, otherwise a tuple
-        (
-            requirements from pyproject.toml,
-            name of PEP 517 backend,
-            requirements we should check are installed after setting
-                up the build environment
-        )
-    """
-    has_pyproject = os.path.isfile(pyproject_toml)
-    has_setup = os.path.isfile(setup_py)
-
-    if has_pyproject:
-        with io.open(pyproject_toml, encoding="utf-8") as f:
-            pp_toml = pytoml.load(f)
-        build_system = pp_toml.get("build-system")
-    else:
-        build_system = None
-
-    # The following cases must use PEP 517
-    # We check for use_pep517 being non-None and falsey because that means
-    # the user explicitly requested --no-use-pep517.  The value 0 as
-    # opposed to False can occur when the value is provided via an
-    # environment variable or config file option (due to the quirk of
-    # strtobool() returning an integer in pip's configuration code).
-    if has_pyproject and not has_setup:
-        if use_pep517 is not None and not use_pep517:
-            raise InstallationError(
-                "Disabling PEP 517 processing is invalid: "
-                "project does not have a setup.py"
-            )
-        use_pep517 = True
-    elif build_system and "build-backend" in build_system:
-        if use_pep517 is not None and not use_pep517:
-            raise InstallationError(
-                "Disabling PEP 517 processing is invalid: "
-                "project specifies a build backend of {} "
-                "in pyproject.toml".format(
-                    build_system["build-backend"]
-                )
-            )
-        use_pep517 = True
-
-    # If we haven't worked out whether to use PEP 517 yet,
-    # and the user hasn't explicitly stated a preference,
-    # we do so if the project has a pyproject.toml file.
-    elif use_pep517 is None:
-        use_pep517 = has_pyproject
-
-    # At this point, we know whether we're going to use PEP 517.
-    assert use_pep517 is not None
-
-    # If we're using the legacy code path, there is nothing further
-    # for us to do here.
-    if not use_pep517:
-        return None
-
-    if build_system is None:
-        # Either the user has a pyproject.toml with no build-system
-        # section, or the user has no pyproject.toml, but has opted in
-        # explicitly via --use-pep517.
-        # In the absence of any explicit backend specification, we
-        # assume the setuptools backend that most closely emulates the
-        # traditional direct setup.py execution, and require wheel and
-        # a version of setuptools that supports that backend.
-
-        build_system = {
-            "requires": ["setuptools>=40.8.0", "wheel"],
-            "build-backend": "setuptools.build_meta:__legacy__",
-        }
-
-    # If we're using PEP 517, we have build system information (either
-    # from pyproject.toml, or defaulted by the code above).
-    # Note that at this point, we do not know if the user has actually
-    # specified a backend, though.
-    assert build_system is not None
-
-    # Ensure that the build-system section in pyproject.toml conforms
-    # to PEP 518.
-    error_template = (
-        "{package} has a pyproject.toml file that does not comply "
-        "with PEP 518: {reason}"
-    )
-
-    # Specifying the build-system table but not the requires key is invalid
-    if "requires" not in build_system:
-        raise InstallationError(
-            error_template.format(package=req_name, reason=(
-                "it has a 'build-system' table but not "
-                "'build-system.requires' which is mandatory in the table"
-            ))
-        )
-
-    # Error out if requires is not a list of strings
-    requires = build_system["requires"]
-    if not _is_list_of_str(requires):
-        raise InstallationError(error_template.format(
-            package=req_name,
-            reason="'build-system.requires' is not a list of strings.",
-        ))
-
-    backend = build_system.get("build-backend")
-    check = []  # type: List[str]
-    if backend is None:
-        # If the user didn't specify a backend, we assume they want to use
-        # the setuptools backend. But we can't be sure they have included
-        # a version of setuptools which supplies the backend, or wheel
-        # (which is needed by the backend) in their requirements. So we
-        # make a note to check that those requirements are present once
-        # we have set up the environment.
-        # This is quite a lot of work to check for a very specific case. But
-        # the problem is, that case is potentially quite common - projects that
-        # adopted PEP 518 early for the ability to specify requirements to
-        # execute setup.py, but never considered needing to mention the build
-        # tools themselves. The original PEP 518 code had a similar check (but
-        # implemented in a different way).
-        backend = "setuptools.build_meta:__legacy__"
-        check = ["setuptools>=40.8.0", "wheel"]
-
-    return (requires, backend, check)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/req/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/req/__init__.py
deleted file mode 100644
index 5e4eb92..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/req/__init__.py
+++ /dev/null
@@ -1,77 +0,0 @@
-from __future__ import absolute_import
-
-import logging
-
-from .req_install import InstallRequirement
-from .req_set import RequirementSet
-from .req_file import parse_requirements
-from pip._internal.utils.logging import indent_log
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if MYPY_CHECK_RUNNING:
-    from typing import List, Sequence  # noqa: F401
-
-__all__ = [
-    "RequirementSet", "InstallRequirement",
-    "parse_requirements", "install_given_reqs",
-]
-
-logger = logging.getLogger(__name__)
-
-
-def install_given_reqs(
-    to_install,  # type: List[InstallRequirement]
-    install_options,  # type: List[str]
-    global_options=(),  # type: Sequence[str]
-    *args, **kwargs
-):
-    # type: (...) -> List[InstallRequirement]
-    """
-    Install everything in the given list.
-
-    (to be called after having downloaded and unpacked the packages)
-    """
-
-    if to_install:
-        logger.info(
-            'Installing collected packages: %s',
-            ', '.join([req.name for req in to_install]),
-        )
-
-    with indent_log():
-        for requirement in to_install:
-            if requirement.conflicts_with:
-                logger.info(
-                    'Found existing installation: %s',
-                    requirement.conflicts_with,
-                )
-                with indent_log():
-                    uninstalled_pathset = requirement.uninstall(
-                        auto_confirm=True
-                    )
-            try:
-                requirement.install(
-                    install_options,
-                    global_options,
-                    *args,
-                    **kwargs
-                )
-            except Exception:
-                should_rollback = (
-                    requirement.conflicts_with and
-                    not requirement.install_succeeded
-                )
-                # if install did not succeed, rollback previous uninstall
-                if should_rollback:
-                    uninstalled_pathset.rollback()
-                raise
-            else:
-                should_commit = (
-                    requirement.conflicts_with and
-                    requirement.install_succeeded
-                )
-                if should_commit:
-                    uninstalled_pathset.commit()
-            requirement.remove_temporary_source()
-
-    return to_install
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/req/constructors.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/req/constructors.py
deleted file mode 100644
index 1eed1dd..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/req/constructors.py
+++ /dev/null
@@ -1,339 +0,0 @@
-"""Backing implementation for InstallRequirement's various constructors
-
-The idea here is that these formed a major chunk of InstallRequirement's size
-so, moving them and support code dedicated to them outside of that class
-helps creates for better understandability for the rest of the code.
-
-These are meant to be used elsewhere within pip to create instances of
-InstallRequirement.
-"""
-
-import logging
-import os
-import re
-
-from pip._vendor.packaging.markers import Marker
-from pip._vendor.packaging.requirements import InvalidRequirement, Requirement
-from pip._vendor.packaging.specifiers import Specifier
-from pip._vendor.pkg_resources import RequirementParseError, parse_requirements
-
-from pip._internal.download import (
-    is_archive_file, is_url, path_to_url, url_to_path,
-)
-from pip._internal.exceptions import InstallationError
-from pip._internal.models.index import PyPI, TestPyPI
-from pip._internal.models.link import Link
-from pip._internal.pyproject import make_pyproject_path
-from pip._internal.req.req_install import InstallRequirement
-from pip._internal.utils.misc import is_installable_dir
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-from pip._internal.vcs import vcs
-from pip._internal.wheel import Wheel
-
-if MYPY_CHECK_RUNNING:
-    from typing import (   # noqa: F401
-        Optional, Tuple, Set, Any, Union, Text, Dict,
-    )
-    from pip._internal.cache import WheelCache  # noqa: F401
-
-
-__all__ = [
-    "install_req_from_editable", "install_req_from_line",
-    "parse_editable"
-]
-
-logger = logging.getLogger(__name__)
-operators = Specifier._operators.keys()
-
-
-def _strip_extras(path):
-    # type: (str) -> Tuple[str, Optional[str]]
-    m = re.match(r'^(.+)(\[[^\]]+\])$', path)
-    extras = None
-    if m:
-        path_no_extras = m.group(1)
-        extras = m.group(2)
-    else:
-        path_no_extras = path
-
-    return path_no_extras, extras
-
-
-def parse_editable(editable_req):
-    # type: (str) -> Tuple[Optional[str], str, Optional[Set[str]]]
-    """Parses an editable requirement into:
-        - a requirement name
-        - an URL
-        - extras
-        - editable options
-    Accepted requirements:
-        svn+http://blahblah@rev#egg=Foobar[baz]&subdirectory=version_subdir
-        .[some_extra]
-    """
-
-    url = editable_req
-
-    # If a file path is specified with extras, strip off the extras.
-    url_no_extras, extras = _strip_extras(url)
-
-    if os.path.isdir(url_no_extras):
-        if not os.path.exists(os.path.join(url_no_extras, 'setup.py')):
-            msg = (
-                'File "setup.py" not found. Directory cannot be installed '
-                'in editable mode: {}'.format(os.path.abspath(url_no_extras))
-            )
-            pyproject_path = make_pyproject_path(url_no_extras)
-            if os.path.isfile(pyproject_path):
-                msg += (
-                    '\n(A "pyproject.toml" file was found, but editable '
-                    'mode currently requires a setup.py based build.)'
-                )
-            raise InstallationError(msg)
-
-        # Treating it as code that has already been checked out
-        url_no_extras = path_to_url(url_no_extras)
-
-    if url_no_extras.lower().startswith('file:'):
-        package_name = Link(url_no_extras).egg_fragment
-        if extras:
-            return (
-                package_name,
-                url_no_extras,
-                Requirement("placeholder" + extras.lower()).extras,
-            )
-        else:
-            return package_name, url_no_extras, None
-
-    for version_control in vcs:
-        if url.lower().startswith('%s:' % version_control):
-            url = '%s+%s' % (version_control, url)
-            break
-
-    if '+' not in url:
-        raise InstallationError(
-            '%s should either be a path to a local project or a VCS url '
-            'beginning with svn+, git+, hg+, or bzr+' %
-            editable_req
-        )
-
-    vc_type = url.split('+', 1)[0].lower()
-
-    if not vcs.get_backend(vc_type):
-        error_message = 'For --editable=%s only ' % editable_req + \
-            ', '.join([backend.name + '+URL' for backend in vcs.backends]) + \
-            ' is currently supported'
-        raise InstallationError(error_message)
-
-    package_name = Link(url).egg_fragment
-    if not package_name:
-        raise InstallationError(
-            "Could not detect requirement name for '%s', please specify one "
-            "with #egg=your_package_name" % editable_req
-        )
-    return package_name, url, None
-
-
-def deduce_helpful_msg(req):
-    # type: (str) -> str
-    """Returns helpful msg in case requirements file does not exist,
-    or cannot be parsed.
-
-    :params req: Requirements file path
-    """
-    msg = ""
-    if os.path.exists(req):
-        msg = " It does exist."
-        # Try to parse and check if it is a requirements file.
-        try:
-            with open(req, 'r') as fp:
-                # parse first line only
-                next(parse_requirements(fp.read()))
-                msg += " The argument you provided " + \
-                    "(%s) appears to be a" % (req) + \
-                    " requirements file. If that is the" + \
-                    " case, use the '-r' flag to install" + \
-                    " the packages specified within it."
-        except RequirementParseError:
-            logger.debug("Cannot parse '%s' as requirements \
-            file" % (req), exc_info=True)
-    else:
-        msg += " File '%s' does not exist." % (req)
-    return msg
-
-
-# ---- The actual constructors follow ----
-
-
-def install_req_from_editable(
-    editable_req,  # type: str
-    comes_from=None,  # type: Optional[str]
-    use_pep517=None,  # type: Optional[bool]
-    isolated=False,  # type: bool
-    options=None,  # type: Optional[Dict[str, Any]]
-    wheel_cache=None,  # type: Optional[WheelCache]
-    constraint=False  # type: bool
-):
-    # type: (...) -> InstallRequirement
-    name, url, extras_override = parse_editable(editable_req)
-    if url.startswith('file:'):
-        source_dir = url_to_path(url)
-    else:
-        source_dir = None
-
-    if name is not None:
-        try:
-            req = Requirement(name)
-        except InvalidRequirement:
-            raise InstallationError("Invalid requirement: '%s'" % name)
-    else:
-        req = None
-    return InstallRequirement(
-        req, comes_from, source_dir=source_dir,
-        editable=True,
-        link=Link(url),
-        constraint=constraint,
-        use_pep517=use_pep517,
-        isolated=isolated,
-        options=options if options else {},
-        wheel_cache=wheel_cache,
-        extras=extras_override or (),
-    )
-
-
-def install_req_from_line(
-    name,  # type: str
-    comes_from=None,  # type: Optional[Union[str, InstallRequirement]]
-    use_pep517=None,  # type: Optional[bool]
-    isolated=False,  # type: bool
-    options=None,  # type: Optional[Dict[str, Any]]
-    wheel_cache=None,  # type: Optional[WheelCache]
-    constraint=False  # type: bool
-):
-    # type: (...) -> InstallRequirement
-    """Creates an InstallRequirement from a name, which might be a
-    requirement, directory containing 'setup.py', filename, or URL.
-    """
-    if is_url(name):
-        marker_sep = '; '
-    else:
-        marker_sep = ';'
-    if marker_sep in name:
-        name, markers_as_string = name.split(marker_sep, 1)
-        markers_as_string = markers_as_string.strip()
-        if not markers_as_string:
-            markers = None
-        else:
-            markers = Marker(markers_as_string)
-    else:
-        markers = None
-    name = name.strip()
-    req_as_string = None
-    path = os.path.normpath(os.path.abspath(name))
-    link = None
-    extras_as_string = None
-
-    if is_url(name):
-        link = Link(name)
-    else:
-        p, extras_as_string = _strip_extras(path)
-        looks_like_dir = os.path.isdir(p) and (
-            os.path.sep in name or
-            (os.path.altsep is not None and os.path.altsep in name) or
-            name.startswith('.')
-        )
-        if looks_like_dir:
-            if not is_installable_dir(p):
-                raise InstallationError(
-                    "Directory %r is not installable. Neither 'setup.py' "
-                    "nor 'pyproject.toml' found." % name
-                )
-            link = Link(path_to_url(p))
-        elif is_archive_file(p):
-            if not os.path.isfile(p):
-                logger.warning(
-                    'Requirement %r looks like a filename, but the '
-                    'file does not exist',
-                    name
-                )
-            link = Link(path_to_url(p))
-
-    # it's a local file, dir, or url
-    if link:
-        # Handle relative file URLs
-        if link.scheme == 'file' and re.search(r'\.\./', link.url):
-            link = Link(
-                path_to_url(os.path.normpath(os.path.abspath(link.path))))
-        # wheel file
-        if link.is_wheel:
-            wheel = Wheel(link.filename)  # can raise InvalidWheelFilename
-            req_as_string = "%s==%s" % (wheel.name, wheel.version)
-        else:
-            # set the req to the egg fragment.  when it's not there, this
-            # will become an 'unnamed' requirement
-            req_as_string = link.egg_fragment
-
-    # a requirement specifier
-    else:
-        req_as_string = name
-
-    if extras_as_string:
-        extras = Requirement("placeholder" + extras_as_string.lower()).extras
-    else:
-        extras = ()
-    if req_as_string is not None:
-        try:
-            req = Requirement(req_as_string)
-        except InvalidRequirement:
-            if os.path.sep in req_as_string:
-                add_msg = "It looks like a path."
-                add_msg += deduce_helpful_msg(req_as_string)
-            elif ('=' in req_as_string and
-                  not any(op in req_as_string for op in operators)):
-                add_msg = "= is not a valid operator. Did you mean == ?"
-            else:
-                add_msg = ""
-            raise InstallationError(
-                "Invalid requirement: '%s'\n%s" % (req_as_string, add_msg)
-            )
-    else:
-        req = None
-
-    return InstallRequirement(
-        req, comes_from, link=link, markers=markers,
-        use_pep517=use_pep517, isolated=isolated,
-        options=options if options else {},
-        wheel_cache=wheel_cache,
-        constraint=constraint,
-        extras=extras,
-    )
-
-
-def install_req_from_req_string(
-    req_string,  # type: str
-    comes_from=None,  # type: Optional[InstallRequirement]
-    isolated=False,  # type: bool
-    wheel_cache=None,  # type: Optional[WheelCache]
-    use_pep517=None  # type: Optional[bool]
-):
-    # type: (...) -> InstallRequirement
-    try:
-        req = Requirement(req_string)
-    except InvalidRequirement:
-        raise InstallationError("Invalid requirement: '%s'" % req)
-
-    domains_not_allowed = [
-        PyPI.file_storage_domain,
-        TestPyPI.file_storage_domain,
-    ]
-    if req.url and comes_from.link.netloc in domains_not_allowed:
-        # Explicitly disallow pypi packages that depend on external urls
-        raise InstallationError(
-            "Packages installed from PyPI cannot depend on packages "
-            "which are not also hosted on PyPI.\n"
-            "%s depends on %s " % (comes_from.name, req)
-        )
-
-    return InstallRequirement(
-        req, comes_from, isolated=isolated, wheel_cache=wheel_cache,
-        use_pep517=use_pep517
-    )
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/req/req_file.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/req/req_file.py
deleted file mode 100644
index 726f2f6..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/req/req_file.py
+++ /dev/null
@@ -1,382 +0,0 @@
-"""
-Requirements file parsing
-"""
-
-from __future__ import absolute_import
-
-import optparse
-import os
-import re
-import shlex
-import sys
-
-from pip._vendor.six.moves import filterfalse
-from pip._vendor.six.moves.urllib import parse as urllib_parse
-
-from pip._internal.cli import cmdoptions
-from pip._internal.download import get_file_content
-from pip._internal.exceptions import RequirementsFileParseError
-from pip._internal.req.constructors import (
-    install_req_from_editable, install_req_from_line,
-)
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if MYPY_CHECK_RUNNING:
-    from typing import (  # noqa: F401
-        Iterator, Tuple, Optional, List, Callable, Text
-    )
-    from pip._internal.req import InstallRequirement  # noqa: F401
-    from pip._internal.cache import WheelCache  # noqa: F401
-    from pip._internal.index import PackageFinder  # noqa: F401
-    from pip._internal.download import PipSession  # noqa: F401
-
-    ReqFileLines = Iterator[Tuple[int, Text]]
-
-__all__ = ['parse_requirements']
-
-SCHEME_RE = re.compile(r'^(http|https|file):', re.I)
-COMMENT_RE = re.compile(r'(^|\s)+#.*$')
-
-# Matches environment variable-style values in '${MY_VARIABLE_1}' with the
-# variable name consisting of only uppercase letters, digits or the '_'
-# (underscore). This follows the POSIX standard defined in IEEE Std 1003.1,
-# 2013 Edition.
-ENV_VAR_RE = re.compile(r'(?P<var>\$\{(?P<name>[A-Z0-9_]+)\})')
-
-SUPPORTED_OPTIONS = [
-    cmdoptions.constraints,
-    cmdoptions.editable,
-    cmdoptions.requirements,
-    cmdoptions.no_index,
-    cmdoptions.index_url,
-    cmdoptions.find_links,
-    cmdoptions.extra_index_url,
-    cmdoptions.always_unzip,
-    cmdoptions.no_binary,
-    cmdoptions.only_binary,
-    cmdoptions.pre,
-    cmdoptions.trusted_host,
-    cmdoptions.require_hashes,
-]  # type: List[Callable[..., optparse.Option]]
-
-# options to be passed to requirements
-SUPPORTED_OPTIONS_REQ = [
-    cmdoptions.install_options,
-    cmdoptions.global_options,
-    cmdoptions.hash,
-]  # type: List[Callable[..., optparse.Option]]
-
-# the 'dest' string values
-SUPPORTED_OPTIONS_REQ_DEST = [str(o().dest) for o in SUPPORTED_OPTIONS_REQ]
-
-
-def parse_requirements(
-    filename,  # type: str
-    finder=None,  # type: Optional[PackageFinder]
-    comes_from=None,  # type: Optional[str]
-    options=None,  # type: Optional[optparse.Values]
-    session=None,  # type: Optional[PipSession]
-    constraint=False,  # type: bool
-    wheel_cache=None,  # type: Optional[WheelCache]
-    use_pep517=None  # type: Optional[bool]
-):
-    # type: (...) -> Iterator[InstallRequirement]
-    """Parse a requirements file and yield InstallRequirement instances.
-
-    :param filename:    Path or url of requirements file.
-    :param finder:      Instance of pip.index.PackageFinder.
-    :param comes_from:  Origin description of requirements.
-    :param options:     cli options.
-    :param session:     Instance of pip.download.PipSession.
-    :param constraint:  If true, parsing a constraint file rather than
-        requirements file.
-    :param wheel_cache: Instance of pip.wheel.WheelCache
-    :param use_pep517:  Value of the --use-pep517 option.
-    """
-    if session is None:
-        raise TypeError(
-            "parse_requirements() missing 1 required keyword argument: "
-            "'session'"
-        )
-
-    _, content = get_file_content(
-        filename, comes_from=comes_from, session=session
-    )
-
-    lines_enum = preprocess(content, options)
-
-    for line_number, line in lines_enum:
-        req_iter = process_line(line, filename, line_number, finder,
-                                comes_from, options, session, wheel_cache,
-                                use_pep517=use_pep517, constraint=constraint)
-        for req in req_iter:
-            yield req
-
-
-def preprocess(content, options):
-    # type: (Text, Optional[optparse.Values]) -> ReqFileLines
-    """Split, filter, and join lines, and return a line iterator
-
-    :param content: the content of the requirements file
-    :param options: cli options
-    """
-    lines_enum = enumerate(content.splitlines(), start=1)  # type: ReqFileLines
-    lines_enum = join_lines(lines_enum)
-    lines_enum = ignore_comments(lines_enum)
-    lines_enum = skip_regex(lines_enum, options)
-    lines_enum = expand_env_variables(lines_enum)
-    return lines_enum
-
-
-def process_line(
-    line,  # type: Text
-    filename,  # type: str
-    line_number,  # type: int
-    finder=None,  # type: Optional[PackageFinder]
-    comes_from=None,  # type: Optional[str]
-    options=None,  # type: Optional[optparse.Values]
-    session=None,  # type: Optional[PipSession]
-    wheel_cache=None,  # type: Optional[WheelCache]
-    use_pep517=None,  # type: Optional[bool]
-    constraint=False  # type: bool
-):
-    # type: (...) -> Iterator[InstallRequirement]
-    """Process a single requirements line; This can result in creating/yielding
-    requirements, or updating the finder.
-
-    For lines that contain requirements, the only options that have an effect
-    are from SUPPORTED_OPTIONS_REQ, and they are scoped to the
-    requirement. Other options from SUPPORTED_OPTIONS may be present, but are
-    ignored.
-
-    For lines that do not contain requirements, the only options that have an
-    effect are from SUPPORTED_OPTIONS. Options from SUPPORTED_OPTIONS_REQ may
-    be present, but are ignored. These lines may contain multiple options
-    (although our docs imply only one is supported), and all our parsed and
-    affect the finder.
-
-    :param constraint: If True, parsing a constraints file.
-    :param options: OptionParser options that we may update
-    """
-    parser = build_parser(line)
-    defaults = parser.get_default_values()
-    defaults.index_url = None
-    if finder:
-        defaults.format_control = finder.format_control
-    args_str, options_str = break_args_options(line)
-    # Prior to 2.7.3, shlex cannot deal with unicode entries
-    if sys.version_info < (2, 7, 3):
-        # https://github.com/python/mypy/issues/1174
-        options_str = options_str.encode('utf8')  # type: ignore
-    # https://github.com/python/mypy/issues/1174
-    opts, _ = parser.parse_args(
-        shlex.split(options_str), defaults)  # type: ignore
-
-    # preserve for the nested code path
-    line_comes_from = '%s %s (line %s)' % (
-        '-c' if constraint else '-r', filename, line_number,
-    )
-
-    # yield a line requirement
-    if args_str:
-        isolated = options.isolated_mode if options else False
-        if options:
-            cmdoptions.check_install_build_global(options, opts)
-        # get the options that apply to requirements
-        req_options = {}
-        for dest in SUPPORTED_OPTIONS_REQ_DEST:
-            if dest in opts.__dict__ and opts.__dict__[dest]:
-                req_options[dest] = opts.__dict__[dest]
-        yield install_req_from_line(
-            args_str, line_comes_from, constraint=constraint,
-            use_pep517=use_pep517,
-            isolated=isolated, options=req_options, wheel_cache=wheel_cache
-        )
-
-    # yield an editable requirement
-    elif opts.editables:
-        isolated = options.isolated_mode if options else False
-        yield install_req_from_editable(
-            opts.editables[0], comes_from=line_comes_from,
-            use_pep517=use_pep517,
-            constraint=constraint, isolated=isolated, wheel_cache=wheel_cache
-        )
-
-    # parse a nested requirements file
-    elif opts.requirements or opts.constraints:
-        if opts.requirements:
-            req_path = opts.requirements[0]
-            nested_constraint = False
-        else:
-            req_path = opts.constraints[0]
-            nested_constraint = True
-        # original file is over http
-        if SCHEME_RE.search(filename):
-            # do a url join so relative paths work
-            req_path = urllib_parse.urljoin(filename, req_path)
-        # original file and nested file are paths
-        elif not SCHEME_RE.search(req_path):
-            # do a join so relative paths work
-            req_path = os.path.join(os.path.dirname(filename), req_path)
-        # TODO: Why not use `comes_from='-r {} (line {})'` here as well?
-        parsed_reqs = parse_requirements(
-            req_path, finder, comes_from, options, session,
-            constraint=nested_constraint, wheel_cache=wheel_cache
-        )
-        for req in parsed_reqs:
-            yield req
-
-    # percolate hash-checking option upward
-    elif opts.require_hashes:
-        options.require_hashes = opts.require_hashes
-
-    # set finder options
-    elif finder:
-        if opts.index_url:
-            finder.index_urls = [opts.index_url]
-        if opts.no_index is True:
-            finder.index_urls = []
-        if opts.extra_index_urls:
-            finder.index_urls.extend(opts.extra_index_urls)
-        if opts.find_links:
-            # FIXME: it would be nice to keep track of the source
-            # of the find_links: support a find-links local path
-            # relative to a requirements file.
-            value = opts.find_links[0]
-            req_dir = os.path.dirname(os.path.abspath(filename))
-            relative_to_reqs_file = os.path.join(req_dir, value)
-            if os.path.exists(relative_to_reqs_file):
-                value = relative_to_reqs_file
-            finder.find_links.append(value)
-        if opts.pre:
-            finder.allow_all_prereleases = True
-        if opts.trusted_hosts:
-            finder.secure_origins.extend(
-                ("*", host, "*") for host in opts.trusted_hosts)
-
-
-def break_args_options(line):
-    # type: (Text) -> Tuple[str, Text]
-    """Break up the line into an args and options string.  We only want to shlex
-    (and then optparse) the options, not the args.  args can contain markers
-    which are corrupted by shlex.
-    """
-    tokens = line.split(' ')
-    args = []
-    options = tokens[:]
-    for token in tokens:
-        if token.startswith('-') or token.startswith('--'):
-            break
-        else:
-            args.append(token)
-            options.pop(0)
-    return ' '.join(args), ' '.join(options)  # type: ignore
-
-
-def build_parser(line):
-    # type: (Text) -> optparse.OptionParser
-    """
-    Return a parser for parsing requirement lines
-    """
-    parser = optparse.OptionParser(add_help_option=False)
-
-    option_factories = SUPPORTED_OPTIONS + SUPPORTED_OPTIONS_REQ
-    for option_factory in option_factories:
-        option = option_factory()
-        parser.add_option(option)
-
-    # By default optparse sys.exits on parsing errors. We want to wrap
-    # that in our own exception.
-    def parser_exit(self, msg):
-        # add offending line
-        msg = 'Invalid requirement: %s\n%s' % (line, msg)
-        raise RequirementsFileParseError(msg)
-    # NOTE: mypy disallows assigning to a method
-    #       https://github.com/python/mypy/issues/2427
-    parser.exit = parser_exit  # type: ignore
-
-    return parser
-
-
-def join_lines(lines_enum):
-    # type: (ReqFileLines) -> ReqFileLines
-    """Joins a line ending in '\' with the previous line (except when following
-    comments).  The joined line takes on the index of the first line.
-    """
-    primary_line_number = None
-    new_line = []  # type: List[Text]
-    for line_number, line in lines_enum:
-        if not line.endswith('\\') or COMMENT_RE.match(line):
-            if COMMENT_RE.match(line):
-                # this ensures comments are always matched later
-                line = ' ' + line
-            if new_line:
-                new_line.append(line)
-                yield primary_line_number, ''.join(new_line)
-                new_line = []
-            else:
-                yield line_number, line
-        else:
-            if not new_line:
-                primary_line_number = line_number
-            new_line.append(line.strip('\\'))
-
-    # last line contains \
-    if new_line:
-        yield primary_line_number, ''.join(new_line)
-
-    # TODO: handle space after '\'.
-
-
-def ignore_comments(lines_enum):
-    # type: (ReqFileLines) -> ReqFileLines
-    """
-    Strips comments and filter empty lines.
-    """
-    for line_number, line in lines_enum:
-        line = COMMENT_RE.sub('', line)
-        line = line.strip()
-        if line:
-            yield line_number, line
-
-
-def skip_regex(lines_enum, options):
-    # type: (ReqFileLines, Optional[optparse.Values]) -> ReqFileLines
-    """
-    Skip lines that match '--skip-requirements-regex' pattern
-
-    Note: the regex pattern is only built once
-    """
-    skip_regex = options.skip_requirements_regex if options else None
-    if skip_regex:
-        pattern = re.compile(skip_regex)
-        lines_enum = filterfalse(lambda e: pattern.search(e[1]), lines_enum)
-    return lines_enum
-
-
-def expand_env_variables(lines_enum):
-    # type: (ReqFileLines) -> ReqFileLines
-    """Replace all environment variables that can be retrieved via `os.getenv`.
-
-    The only allowed format for environment variables defined in the
-    requirement file is `${MY_VARIABLE_1}` to ensure two things:
-
-    1. Strings that contain a `$` aren't accidentally (partially) expanded.
-    2. Ensure consistency across platforms for requirement files.
-
-    These points are the result of a discusssion on the `github pull
-    request #3514 <https://github.com/pypa/pip/pull/3514>`_.
-
-    Valid characters in variable names follow the `POSIX standard
-    <http://pubs.opengroup.org/onlinepubs/9699919799/>`_ and are limited
-    to uppercase letter, digits and the `_` (underscore).
-    """
-    for line_number, line in lines_enum:
-        for env_var, var_name in ENV_VAR_RE.findall(line):
-            value = os.getenv(var_name)
-            if not value:
-                continue
-
-            line = line.replace(env_var, value)
-
-        yield line_number, line
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/req/req_install.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/req/req_install.py
deleted file mode 100644
index a4834b0..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/req/req_install.py
+++ /dev/null
@@ -1,1021 +0,0 @@
-from __future__ import absolute_import
-
-import logging
-import os
-import shutil
-import sys
-import sysconfig
-import zipfile
-from distutils.util import change_root
-
-from pip._vendor import pkg_resources, six
-from pip._vendor.packaging.requirements import Requirement
-from pip._vendor.packaging.utils import canonicalize_name
-from pip._vendor.packaging.version import Version
-from pip._vendor.packaging.version import parse as parse_version
-from pip._vendor.pep517.wrappers import Pep517HookCaller
-
-from pip._internal import wheel
-from pip._internal.build_env import NoOpBuildEnvironment
-from pip._internal.exceptions import InstallationError
-from pip._internal.locations import (
-    PIP_DELETE_MARKER_FILENAME, running_under_virtualenv,
-)
-from pip._internal.models.link import Link
-from pip._internal.pyproject import load_pyproject_toml, make_pyproject_path
-from pip._internal.req.req_uninstall import UninstallPathSet
-from pip._internal.utils.compat import native_str
-from pip._internal.utils.hashes import Hashes
-from pip._internal.utils.logging import indent_log
-from pip._internal.utils.misc import (
-    _make_build_dir, ask_path_exists, backup_dir, call_subprocess,
-    display_path, dist_in_site_packages, dist_in_usersite, ensure_dir,
-    get_installed_version, redact_password_from_url, rmtree,
-)
-from pip._internal.utils.packaging import get_metadata
-from pip._internal.utils.setuptools_build import SETUPTOOLS_SHIM
-from pip._internal.utils.temp_dir import TempDirectory
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-from pip._internal.utils.ui import open_spinner
-from pip._internal.vcs import vcs
-from pip._internal.wheel import move_wheel_files
-
-if MYPY_CHECK_RUNNING:
-    from typing import (  # noqa: F401
-        Optional, Iterable, List, Union, Any, Text, Sequence, Dict
-    )
-    from pip._internal.build_env import BuildEnvironment  # noqa: F401
-    from pip._internal.cache import WheelCache  # noqa: F401
-    from pip._internal.index import PackageFinder  # noqa: F401
-    from pip._vendor.pkg_resources import Distribution  # noqa: F401
-    from pip._vendor.packaging.specifiers import SpecifierSet  # noqa: F401
-    from pip._vendor.packaging.markers import Marker  # noqa: F401
-
-
-logger = logging.getLogger(__name__)
-
-
-class InstallRequirement(object):
-    """
-    Represents something that may be installed later on, may have information
-    about where to fetch the relavant requirement and also contains logic for
-    installing the said requirement.
-    """
-
-    def __init__(
-        self,
-        req,  # type: Optional[Requirement]
-        comes_from,  # type: Optional[Union[str, InstallRequirement]]
-        source_dir=None,  # type: Optional[str]
-        editable=False,  # type: bool
-        link=None,  # type: Optional[Link]
-        update=True,  # type: bool
-        markers=None,  # type: Optional[Marker]
-        use_pep517=None,  # type: Optional[bool]
-        isolated=False,  # type: bool
-        options=None,  # type: Optional[Dict[str, Any]]
-        wheel_cache=None,  # type: Optional[WheelCache]
-        constraint=False,  # type: bool
-        extras=()  # type: Iterable[str]
-    ):
-        # type: (...) -> None
-        assert req is None or isinstance(req, Requirement), req
-        self.req = req
-        self.comes_from = comes_from
-        self.constraint = constraint
-        if source_dir is not None:
-            self.source_dir = os.path.normpath(os.path.abspath(source_dir))
-        else:
-            self.source_dir = None
-        self.editable = editable
-
-        self._wheel_cache = wheel_cache
-        if link is None and req and req.url:
-            # PEP 508 URL requirement
-            link = Link(req.url)
-        self.link = self.original_link = link
-
-        if extras:
-            self.extras = extras
-        elif req:
-            self.extras = {
-                pkg_resources.safe_extra(extra) for extra in req.extras
-            }
-        else:
-            self.extras = set()
-        if markers is None and req:
-            markers = req.marker
-        self.markers = markers
-
-        self._egg_info_path = None  # type: Optional[str]
-        # This holds the pkg_resources.Distribution object if this requirement
-        # is already available:
-        self.satisfied_by = None
-        # This hold the pkg_resources.Distribution object if this requirement
-        # conflicts with another installed distribution:
-        self.conflicts_with = None
-        # Temporary build location
-        self._temp_build_dir = TempDirectory(kind="req-build")
-        # Used to store the global directory where the _temp_build_dir should
-        # have been created. Cf _correct_build_location method.
-        self._ideal_build_dir = None  # type: Optional[str]
-        # True if the editable should be updated:
-        self.update = update
-        # Set to True after successful installation
-        self.install_succeeded = None  # type: Optional[bool]
-        # UninstallPathSet of uninstalled distribution (for possible rollback)
-        self.uninstalled_pathset = None
-        self.options = options if options else {}
-        # Set to True after successful preparation of this requirement
-        self.prepared = False
-        self.is_direct = False
-
-        self.isolated = isolated
-        self.build_env = NoOpBuildEnvironment()  # type: BuildEnvironment
-
-        # For PEP 517, the directory where we request the project metadata
-        # gets stored. We need this to pass to build_wheel, so the backend
-        # can ensure that the wheel matches the metadata (see the PEP for
-        # details).
-        self.metadata_directory = None  # type: Optional[str]
-
-        # The static build requirements (from pyproject.toml)
-        self.pyproject_requires = None  # type: Optional[List[str]]
-
-        # Build requirements that we will check are available
-        self.requirements_to_check = []  # type: List[str]
-
-        # The PEP 517 backend we should use to build the project
-        self.pep517_backend = None  # type: Optional[Pep517HookCaller]
-
-        # Are we using PEP 517 for this requirement?
-        # After pyproject.toml has been loaded, the only valid values are True
-        # and False. Before loading, None is valid (meaning "use the default").
-        # Setting an explicit value before loading pyproject.toml is supported,
-        # but after loading this flag should be treated as read only.
-        self.use_pep517 = use_pep517
-
-    def __str__(self):
-        if self.req:
-            s = str(self.req)
-            if self.link:
-                s += ' from %s' % redact_password_from_url(self.link.url)
-        elif self.link:
-            s = redact_password_from_url(self.link.url)
-        else:
-            s = '<InstallRequirement>'
-        if self.satisfied_by is not None:
-            s += ' in %s' % display_path(self.satisfied_by.location)
-        if self.comes_from:
-            if isinstance(self.comes_from, six.string_types):
-                comes_from = self.comes_from
-            else:
-                comes_from = self.comes_from.from_path()
-            if comes_from:
-                s += ' (from %s)' % comes_from
-        return s
-
-    def __repr__(self):
-        return '<%s object: %s editable=%r>' % (
-            self.__class__.__name__, str(self), self.editable)
-
-    def populate_link(self, finder, upgrade, require_hashes):
-        # type: (PackageFinder, bool, bool) -> None
-        """Ensure that if a link can be found for this, that it is found.
-
-        Note that self.link may still be None - if Upgrade is False and the
-        requirement is already installed.
-
-        If require_hashes is True, don't use the wheel cache, because cached
-        wheels, always built locally, have different hashes than the files
-        downloaded from the index server and thus throw false hash mismatches.
-        Furthermore, cached wheels at present have undeterministic contents due
-        to file modification times.
-        """
-        if self.link is None:
-            self.link = finder.find_requirement(self, upgrade)
-        if self._wheel_cache is not None and not require_hashes:
-            old_link = self.link
-            self.link = self._wheel_cache.get(self.link, self.name)
-            if old_link != self.link:
-                logger.debug('Using cached wheel link: %s', self.link)
-
-    # Things that are valid for all kinds of requirements?
-    @property
-    def name(self):
-        # type: () -> Optional[str]
-        if self.req is None:
-            return None
-        return native_str(pkg_resources.safe_name(self.req.name))
-
-    @property
-    def specifier(self):
-        # type: () -> SpecifierSet
-        return self.req.specifier
-
-    @property
-    def is_pinned(self):
-        # type: () -> bool
-        """Return whether I am pinned to an exact version.
-
-        For example, some-package==1.2 is pinned; some-package>1.2 is not.
-        """
-        specifiers = self.specifier
-        return (len(specifiers) == 1 and
-                next(iter(specifiers)).operator in {'==', '==='})
-
-    @property
-    def installed_version(self):
-        return get_installed_version(self.name)
-
-    def match_markers(self, extras_requested=None):
-        # type: (Optional[Iterable[str]]) -> bool
-        if not extras_requested:
-            # Provide an extra to safely evaluate the markers
-            # without matching any extra
-            extras_requested = ('',)
-        if self.markers is not None:
-            return any(
-                self.markers.evaluate({'extra': extra})
-                for extra in extras_requested)
-        else:
-            return True
-
-    @property
-    def has_hash_options(self):
-        # type: () -> bool
-        """Return whether any known-good hashes are specified as options.
-
-        These activate --require-hashes mode; hashes specified as part of a
-        URL do not.
-
-        """
-        return bool(self.options.get('hashes', {}))
-
-    def hashes(self, trust_internet=True):
-        # type: (bool) -> Hashes
-        """Return a hash-comparer that considers my option- and URL-based
-        hashes to be known-good.
-
-        Hashes in URLs--ones embedded in the requirements file, not ones
-        downloaded from an index server--are almost peers with ones from
-        flags. They satisfy --require-hashes (whether it was implicitly or
-        explicitly activated) but do not activate it. md5 and sha224 are not
-        allowed in flags, which should nudge people toward good algos. We
-        always OR all hashes together, even ones from URLs.
-
-        :param trust_internet: Whether to trust URL-based (#md5=...) hashes
-            downloaded from the internet, as by populate_link()
-
-        """
-        good_hashes = self.options.get('hashes', {}).copy()
-        link = self.link if trust_internet else self.original_link
-        if link and link.hash:
-            good_hashes.setdefault(link.hash_name, []).append(link.hash)
-        return Hashes(good_hashes)
-
-    def from_path(self):
-        # type: () -> Optional[str]
-        """Format a nice indicator to show where this "comes from"
-        """
-        if self.req is None:
-            return None
-        s = str(self.req)
-        if self.comes_from:
-            if isinstance(self.comes_from, six.string_types):
-                comes_from = self.comes_from
-            else:
-                comes_from = self.comes_from.from_path()
-            if comes_from:
-                s += '->' + comes_from
-        return s
-
-    def build_location(self, build_dir):
-        # type: (str) -> Optional[str]
-        assert build_dir is not None
-        if self._temp_build_dir.path is not None:
-            return self._temp_build_dir.path
-        if self.req is None:
-            # for requirement via a path to a directory: the name of the
-            # package is not available yet so we create a temp directory
-            # Once run_egg_info will have run, we'll be able
-            # to fix it via _correct_build_location
-            # Some systems have /tmp as a symlink which confuses custom
-            # builds (such as numpy). Thus, we ensure that the real path
-            # is returned.
-            self._temp_build_dir.create()
-            self._ideal_build_dir = build_dir
-
-            return self._temp_build_dir.path
-        if self.editable:
-            name = self.name.lower()
-        else:
-            name = self.name
-        # FIXME: Is there a better place to create the build_dir? (hg and bzr
-        # need this)
-        if not os.path.exists(build_dir):
-            logger.debug('Creating directory %s', build_dir)
-            _make_build_dir(build_dir)
-        return os.path.join(build_dir, name)
-
-    def _correct_build_location(self):
-        # type: () -> None
-        """Move self._temp_build_dir to self._ideal_build_dir/self.req.name
-
-        For some requirements (e.g. a path to a directory), the name of the
-        package is not available until we run egg_info, so the build_location
-        will return a temporary directory and store the _ideal_build_dir.
-
-        This is only called by self.run_egg_info to fix the temporary build
-        directory.
-        """
-        if self.source_dir is not None:
-            return
-        assert self.req is not None
-        assert self._temp_build_dir.path
-        assert (self._ideal_build_dir is not None and
-                self._ideal_build_dir.path)  # type: ignore
-        old_location = self._temp_build_dir.path
-        self._temp_build_dir.path = None
-
-        new_location = self.build_location(self._ideal_build_dir)
-        if os.path.exists(new_location):
-            raise InstallationError(
-                'A package already exists in %s; please remove it to continue'
-                % display_path(new_location))
-        logger.debug(
-            'Moving package %s from %s to new location %s',
-            self, display_path(old_location), display_path(new_location),
-        )
-        shutil.move(old_location, new_location)
-        self._temp_build_dir.path = new_location
-        self._ideal_build_dir = None
-        self.source_dir = os.path.normpath(os.path.abspath(new_location))
-        self._egg_info_path = None
-
-        # Correct the metadata directory, if it exists
-        if self.metadata_directory:
-            old_meta = self.metadata_directory
-            rel = os.path.relpath(old_meta, start=old_location)
-            new_meta = os.path.join(new_location, rel)
-            new_meta = os.path.normpath(os.path.abspath(new_meta))
-            self.metadata_directory = new_meta
-
-    def remove_temporary_source(self):
-        # type: () -> None
-        """Remove the source files from this requirement, if they are marked
-        for deletion"""
-        if self.source_dir and os.path.exists(
-                os.path.join(self.source_dir, PIP_DELETE_MARKER_FILENAME)):
-            logger.debug('Removing source in %s', self.source_dir)
-            rmtree(self.source_dir)
-        self.source_dir = None
-        self._temp_build_dir.cleanup()
-        self.build_env.cleanup()
-
-    def check_if_exists(self, use_user_site):
-        # type: (bool) -> bool
-        """Find an installed distribution that satisfies or conflicts
-        with this requirement, and set self.satisfied_by or
-        self.conflicts_with appropriately.
-        """
-        if self.req is None:
-            return False
-        try:
-            # get_distribution() will resolve the entire list of requirements
-            # anyway, and we've already determined that we need the requirement
-            # in question, so strip the marker so that we don't try to
-            # evaluate it.
-            no_marker = Requirement(str(self.req))
-            no_marker.marker = None
-            self.satisfied_by = pkg_resources.get_distribution(str(no_marker))
-            if self.editable and self.satisfied_by:
-                self.conflicts_with = self.satisfied_by
-                # when installing editables, nothing pre-existing should ever
-                # satisfy
-                self.satisfied_by = None
-                return True
-        except pkg_resources.DistributionNotFound:
-            return False
-        except pkg_resources.VersionConflict:
-            existing_dist = pkg_resources.get_distribution(
-                self.req.name
-            )
-            if use_user_site:
-                if dist_in_usersite(existing_dist):
-                    self.conflicts_with = existing_dist
-                elif (running_under_virtualenv() and
-                        dist_in_site_packages(existing_dist)):
-                    raise InstallationError(
-                        "Will not install to the user site because it will "
-                        "lack sys.path precedence to %s in %s" %
-                        (existing_dist.project_name, existing_dist.location)
-                    )
-            else:
-                self.conflicts_with = existing_dist
-        return True
-
-    # Things valid for wheels
-    @property
-    def is_wheel(self):
-        # type: () -> bool
-        if not self.link:
-            return False
-        return self.link.is_wheel
-
-    def move_wheel_files(
-        self,
-        wheeldir,  # type: str
-        root=None,  # type: Optional[str]
-        home=None,  # type: Optional[str]
-        prefix=None,  # type: Optional[str]
-        warn_script_location=True,  # type: bool
-        use_user_site=False,  # type: bool
-        pycompile=True  # type: bool
-    ):
-        # type: (...) -> None
-        move_wheel_files(
-            self.name, self.req, wheeldir,
-            user=use_user_site,
-            home=home,
-            root=root,
-            prefix=prefix,
-            pycompile=pycompile,
-            isolated=self.isolated,
-            warn_script_location=warn_script_location,
-        )
-
-    # Things valid for sdists
-    @property
-    def setup_py_dir(self):
-        # type: () -> str
-        return os.path.join(
-            self.source_dir,
-            self.link and self.link.subdirectory_fragment or '')
-
-    @property
-    def setup_py(self):
-        # type: () -> str
-        assert self.source_dir, "No source dir for %s" % self
-
-        setup_py = os.path.join(self.setup_py_dir, 'setup.py')
-
-        # Python2 __file__ should not be unicode
-        if six.PY2 and isinstance(setup_py, six.text_type):
-            setup_py = setup_py.encode(sys.getfilesystemencoding())
-
-        return setup_py
-
-    @property
-    def pyproject_toml(self):
-        # type: () -> str
-        assert self.source_dir, "No source dir for %s" % self
-
-        return make_pyproject_path(self.setup_py_dir)
-
-    def load_pyproject_toml(self):
-        # type: () -> None
-        """Load the pyproject.toml file.
-
-        After calling this routine, all of the attributes related to PEP 517
-        processing for this requirement have been set. In particular, the
-        use_pep517 attribute can be used to determine whether we should
-        follow the PEP 517 or legacy (setup.py) code path.
-        """
-        pep517_data = load_pyproject_toml(
-            self.use_pep517,
-            self.pyproject_toml,
-            self.setup_py,
-            str(self)
-        )
-
-        if pep517_data is None:
-            self.use_pep517 = False
-        else:
-            self.use_pep517 = True
-            requires, backend, check = pep517_data
-            self.requirements_to_check = check
-            self.pyproject_requires = requires
-            self.pep517_backend = Pep517HookCaller(self.setup_py_dir, backend)
-
-            # Use a custom function to call subprocesses
-            self.spin_message = ""
-
-            def runner(cmd, cwd=None, extra_environ=None):
-                with open_spinner(self.spin_message) as spinner:
-                    call_subprocess(
-                        cmd,
-                        cwd=cwd,
-                        extra_environ=extra_environ,
-                        show_stdout=False,
-                        spinner=spinner
-                    )
-                self.spin_message = ""
-
-            self.pep517_backend._subprocess_runner = runner
-
-    def prepare_metadata(self):
-        # type: () -> None
-        """Ensure that project metadata is available.
-
-        Under PEP 517, call the backend hook to prepare the metadata.
-        Under legacy processing, call setup.py egg-info.
-        """
-        assert self.source_dir
-
-        with indent_log():
-            if self.use_pep517:
-                self.prepare_pep517_metadata()
-            else:
-                self.run_egg_info()
-
-        if not self.req:
-            if isinstance(parse_version(self.metadata["Version"]), Version):
-                op = "=="
-            else:
-                op = "==="
-            self.req = Requirement(
-                "".join([
-                    self.metadata["Name"],
-                    op,
-                    self.metadata["Version"],
-                ])
-            )
-            self._correct_build_location()
-        else:
-            metadata_name = canonicalize_name(self.metadata["Name"])
-            if canonicalize_name(self.req.name) != metadata_name:
-                logger.warning(
-                    'Generating metadata for package %s '
-                    'produced metadata for project name %s. Fix your '
-                    '#egg=%s fragments.',
-                    self.name, metadata_name, self.name
-                )
-                self.req = Requirement(metadata_name)
-
-    def prepare_pep517_metadata(self):
-        # type: () -> None
-        assert self.pep517_backend is not None
-
-        metadata_dir = os.path.join(
-            self.setup_py_dir,
-            'pip-wheel-metadata'
-        )
-        ensure_dir(metadata_dir)
-
-        with self.build_env:
-            # Note that Pep517HookCaller implements a fallback for
-            # prepare_metadata_for_build_wheel, so we don't have to
-            # consider the possibility that this hook doesn't exist.
-            backend = self.pep517_backend
-            self.spin_message = "Preparing wheel metadata"
-            distinfo_dir = backend.prepare_metadata_for_build_wheel(
-                metadata_dir
-            )
-
-        self.metadata_directory = os.path.join(metadata_dir, distinfo_dir)
-
-    def run_egg_info(self):
-        # type: () -> None
-        if self.name:
-            logger.debug(
-                'Running setup.py (path:%s) egg_info for package %s',
-                self.setup_py, self.name,
-            )
-        else:
-            logger.debug(
-                'Running setup.py (path:%s) egg_info for package from %s',
-                self.setup_py, self.link,
-            )
-        script = SETUPTOOLS_SHIM % self.setup_py
-        base_cmd = [sys.executable, '-c', script]
-        if self.isolated:
-            base_cmd += ["--no-user-cfg"]
-        egg_info_cmd = base_cmd + ['egg_info']
-        # We can't put the .egg-info files at the root, because then the
-        # source code will be mistaken for an installed egg, causing
-        # problems
-        if self.editable:
-            egg_base_option = []  # type: List[str]
-        else:
-            egg_info_dir = os.path.join(self.setup_py_dir, 'pip-egg-info')
-            ensure_dir(egg_info_dir)
-            egg_base_option = ['--egg-base', 'pip-egg-info']
-        with self.build_env:
-            call_subprocess(
-                egg_info_cmd + egg_base_option,
-                cwd=self.setup_py_dir,
-                show_stdout=False,
-                command_desc='python setup.py egg_info')
-
-    @property
-    def egg_info_path(self):
-        # type: () -> str
-        if self._egg_info_path is None:
-            if self.editable:
-                base = self.source_dir
-            else:
-                base = os.path.join(self.setup_py_dir, 'pip-egg-info')
-            filenames = os.listdir(base)
-            if self.editable:
-                filenames = []
-                for root, dirs, files in os.walk(base):
-                    for dir in vcs.dirnames:
-                        if dir in dirs:
-                            dirs.remove(dir)
-                    # Iterate over a copy of ``dirs``, since mutating
-                    # a list while iterating over it can cause trouble.
-                    # (See https://github.com/pypa/pip/pull/462.)
-                    for dir in list(dirs):
-                        # Don't search in anything that looks like a virtualenv
-                        # environment
-                        if (
-                                os.path.lexists(
-                                    os.path.join(root, dir, 'bin', 'python')
-                                ) or
-                                os.path.exists(
-                                    os.path.join(
-                                        root, dir, 'Scripts', 'Python.exe'
-                                    )
-                                )):
-                            dirs.remove(dir)
-                        # Also don't search through tests
-                        elif dir == 'test' or dir == 'tests':
-                            dirs.remove(dir)
-                    filenames.extend([os.path.join(root, dir)
-                                      for dir in dirs])
-                filenames = [f for f in filenames if f.endswith('.egg-info')]
-
-            if not filenames:
-                raise InstallationError(
-                    "Files/directories not found in %s" % base
-                )
-            # if we have more than one match, we pick the toplevel one.  This
-            # can easily be the case if there is a dist folder which contains
-            # an extracted tarball for testing purposes.
-            if len(filenames) > 1:
-                filenames.sort(
-                    key=lambda x: x.count(os.path.sep) +
-                    (os.path.altsep and x.count(os.path.altsep) or 0)
-                )
-            self._egg_info_path = os.path.join(base, filenames[0])
-        return self._egg_info_path
-
-    @property
-    def metadata(self):
-        if not hasattr(self, '_metadata'):
-            self._metadata = get_metadata(self.get_dist())
-
-        return self._metadata
-
-    def get_dist(self):
-        # type: () -> Distribution
-        """Return a pkg_resources.Distribution for this requirement"""
-        if self.metadata_directory:
-            base_dir, distinfo = os.path.split(self.metadata_directory)
-            metadata = pkg_resources.PathMetadata(
-                base_dir, self.metadata_directory
-            )
-            dist_name = os.path.splitext(distinfo)[0]
-            typ = pkg_resources.DistInfoDistribution
-        else:
-            egg_info = self.egg_info_path.rstrip(os.path.sep)
-            base_dir = os.path.dirname(egg_info)
-            metadata = pkg_resources.PathMetadata(base_dir, egg_info)
-            dist_name = os.path.splitext(os.path.basename(egg_info))[0]
-            # https://github.com/python/mypy/issues/1174
-            typ = pkg_resources.Distribution  # type: ignore
-
-        return typ(
-            base_dir,
-            project_name=dist_name,
-            metadata=metadata,
-        )
-
-    def assert_source_matches_version(self):
-        # type: () -> None
-        assert self.source_dir
-        version = self.metadata['version']
-        if self.req.specifier and version not in self.req.specifier:
-            logger.warning(
-                'Requested %s, but installing version %s',
-                self,
-                version,
-            )
-        else:
-            logger.debug(
-                'Source in %s has version %s, which satisfies requirement %s',
-                display_path(self.source_dir),
-                version,
-                self,
-            )
-
-    # For both source distributions and editables
-    def ensure_has_source_dir(self, parent_dir):
-        # type: (str) -> str
-        """Ensure that a source_dir is set.
-
-        This will create a temporary build dir if the name of the requirement
-        isn't known yet.
-
-        :param parent_dir: The ideal pip parent_dir for the source_dir.
-            Generally src_dir for editables and build_dir for sdists.
-        :return: self.source_dir
-        """
-        if self.source_dir is None:
-            self.source_dir = self.build_location(parent_dir)
-        return self.source_dir
-
-    # For editable installations
-    def install_editable(
-        self,
-        install_options,  # type: List[str]
-        global_options=(),  # type: Sequence[str]
-        prefix=None  # type: Optional[str]
-    ):
-        # type: (...) -> None
-        logger.info('Running setup.py develop for %s', self.name)
-
-        if self.isolated:
-            global_options = list(global_options) + ["--no-user-cfg"]
-
-        if prefix:
-            prefix_param = ['--prefix={}'.format(prefix)]
-            install_options = list(install_options) + prefix_param
-
-        with indent_log():
-            # FIXME: should we do --install-headers here too?
-            with self.build_env:
-                call_subprocess(
-                    [
-                        sys.executable,
-                        '-c',
-                        SETUPTOOLS_SHIM % self.setup_py
-                    ] +
-                    list(global_options) +
-                    ['develop', '--no-deps'] +
-                    list(install_options),
-
-                    cwd=self.setup_py_dir,
-                    show_stdout=False,
-                )
-
-        self.install_succeeded = True
-
-    def update_editable(self, obtain=True):
-        # type: (bool) -> None
-        if not self.link:
-            logger.debug(
-                "Cannot update repository at %s; repository location is "
-                "unknown",
-                self.source_dir,
-            )
-            return
-        assert self.editable
-        assert self.source_dir
-        if self.link.scheme == 'file':
-            # Static paths don't get updated
-            return
-        assert '+' in self.link.url, "bad url: %r" % self.link.url
-        if not self.update:
-            return
-        vc_type, url = self.link.url.split('+', 1)
-        backend = vcs.get_backend(vc_type)
-        if backend:
-            vcs_backend = backend(self.link.url)
-            if obtain:
-                vcs_backend.obtain(self.source_dir)
-            else:
-                vcs_backend.export(self.source_dir)
-        else:
-            assert 0, (
-                'Unexpected version control type (in %s): %s'
-                % (self.link, vc_type))
-
-    # Top-level Actions
-    def uninstall(self, auto_confirm=False, verbose=False,
-                  use_user_site=False):
-        # type: (bool, bool, bool) -> Optional[UninstallPathSet]
-        """
-        Uninstall the distribution currently satisfying this requirement.
-
-        Prompts before removing or modifying files unless
-        ``auto_confirm`` is True.
-
-        Refuses to delete or modify files outside of ``sys.prefix`` -
-        thus uninstallation within a virtual environment can only
-        modify that virtual environment, even if the virtualenv is
-        linked to global site-packages.
-
-        """
-        if not self.check_if_exists(use_user_site):
-            logger.warning("Skipping %s as it is not installed.", self.name)
-            return None
-        dist = self.satisfied_by or self.conflicts_with
-
-        uninstalled_pathset = UninstallPathSet.from_dist(dist)
-        uninstalled_pathset.remove(auto_confirm, verbose)
-        return uninstalled_pathset
-
-    def _clean_zip_name(self, name, prefix):  # only used by archive.
-        assert name.startswith(prefix + os.path.sep), (
-            "name %r doesn't start with prefix %r" % (name, prefix)
-        )
-        name = name[len(prefix) + 1:]
-        name = name.replace(os.path.sep, '/')
-        return name
-
-    def _get_archive_name(self, path, parentdir, rootdir):
-        # type: (str, str, str) -> str
-        path = os.path.join(parentdir, path)
-        name = self._clean_zip_name(path, rootdir)
-        return self.name + '/' + name
-
-    # TODO: Investigate if this should be kept in InstallRequirement
-    #       Seems to be used only when VCS + downloads
-    def archive(self, build_dir):
-        # type: (str) -> None
-        assert self.source_dir
-        create_archive = True
-        archive_name = '%s-%s.zip' % (self.name, self.metadata["version"])
-        archive_path = os.path.join(build_dir, archive_name)
-        if os.path.exists(archive_path):
-            response = ask_path_exists(
-                'The file %s exists. (i)gnore, (w)ipe, (b)ackup, (a)bort ' %
-                display_path(archive_path), ('i', 'w', 'b', 'a'))
-            if response == 'i':
-                create_archive = False
-            elif response == 'w':
-                logger.warning('Deleting %s', display_path(archive_path))
-                os.remove(archive_path)
-            elif response == 'b':
-                dest_file = backup_dir(archive_path)
-                logger.warning(
-                    'Backing up %s to %s',
-                    display_path(archive_path),
-                    display_path(dest_file),
-                )
-                shutil.move(archive_path, dest_file)
-            elif response == 'a':
-                sys.exit(-1)
-        if create_archive:
-            zip = zipfile.ZipFile(
-                archive_path, 'w', zipfile.ZIP_DEFLATED,
-                allowZip64=True
-            )
-            dir = os.path.normcase(os.path.abspath(self.setup_py_dir))
-            for dirpath, dirnames, filenames in os.walk(dir):
-                if 'pip-egg-info' in dirnames:
-                    dirnames.remove('pip-egg-info')
-                for dirname in dirnames:
-                    dir_arcname = self._get_archive_name(dirname,
-                                                         parentdir=dirpath,
-                                                         rootdir=dir)
-                    zipdir = zipfile.ZipInfo(dir_arcname + '/')
-                    zipdir.external_attr = 0x1ED << 16  # 0o755
-                    zip.writestr(zipdir, '')
-                for filename in filenames:
-                    if filename == PIP_DELETE_MARKER_FILENAME:
-                        continue
-                    file_arcname = self._get_archive_name(filename,
-                                                          parentdir=dirpath,
-                                                          rootdir=dir)
-                    filename = os.path.join(dirpath, filename)
-                    zip.write(filename, file_arcname)
-            zip.close()
-            logger.info('Saved %s', display_path(archive_path))
-
-    def install(
-        self,
-        install_options,  # type: List[str]
-        global_options=None,  # type: Optional[Sequence[str]]
-        root=None,  # type: Optional[str]
-        home=None,  # type: Optional[str]
-        prefix=None,  # type: Optional[str]
-        warn_script_location=True,  # type: bool
-        use_user_site=False,  # type: bool
-        pycompile=True  # type: bool
-    ):
-        # type: (...) -> None
-        global_options = global_options if global_options is not None else []
-        if self.editable:
-            self.install_editable(
-                install_options, global_options, prefix=prefix,
-            )
-            return
-        if self.is_wheel:
-            version = wheel.wheel_version(self.source_dir)
-            wheel.check_compatibility(version, self.name)
-
-            self.move_wheel_files(
-                self.source_dir, root=root, prefix=prefix, home=home,
-                warn_script_location=warn_script_location,
-                use_user_site=use_user_site, pycompile=pycompile,
-            )
-            self.install_succeeded = True
-            return
-
-        # Extend the list of global and install options passed on to
-        # the setup.py call with the ones from the requirements file.
-        # Options specified in requirements file override those
-        # specified on the command line, since the last option given
-        # to setup.py is the one that is used.
-        global_options = list(global_options) + \
-            self.options.get('global_options', [])
-        install_options = list(install_options) + \
-            self.options.get('install_options', [])
-
-        if self.isolated:
-            # https://github.com/python/mypy/issues/1174
-            global_options = global_options + ["--no-user-cfg"]  # type: ignore
-
-        with TempDirectory(kind="record") as temp_dir:
-            record_filename = os.path.join(temp_dir.path, 'install-record.txt')
-            install_args = self.get_install_args(
-                global_options, record_filename, root, prefix, pycompile,
-            )
-            msg = 'Running setup.py install for %s' % (self.name,)
-            with open_spinner(msg) as spinner:
-                with indent_log():
-                    with self.build_env:
-                        call_subprocess(
-                            install_args + install_options,
-                            cwd=self.setup_py_dir,
-                            show_stdout=False,
-                            spinner=spinner,
-                        )
-
-            if not os.path.exists(record_filename):
-                logger.debug('Record file %s not found', record_filename)
-                return
-            self.install_succeeded = True
-
-            def prepend_root(path):
-                if root is None or not os.path.isabs(path):
-                    return path
-                else:
-                    return change_root(root, path)
-
-            with open(record_filename) as f:
-                for line in f:
-                    directory = os.path.dirname(line)
-                    if directory.endswith('.egg-info'):
-                        egg_info_dir = prepend_root(directory)
-                        break
-                else:
-                    logger.warning(
-                        'Could not find .egg-info directory in install record'
-                        ' for %s',
-                        self,
-                    )
-                    # FIXME: put the record somewhere
-                    # FIXME: should this be an error?
-                    return
-            new_lines = []
-            with open(record_filename) as f:
-                for line in f:
-                    filename = line.strip()
-                    if os.path.isdir(filename):
-                        filename += os.path.sep
-                    new_lines.append(
-                        os.path.relpath(prepend_root(filename), egg_info_dir)
-                    )
-            new_lines.sort()
-            ensure_dir(egg_info_dir)
-            inst_files_path = os.path.join(egg_info_dir, 'installed-files.txt')
-            with open(inst_files_path, 'w') as f:
-                f.write('\n'.join(new_lines) + '\n')
-
-    def get_install_args(
-        self,
-        global_options,  # type: Sequence[str]
-        record_filename,  # type: str
-        root,  # type: Optional[str]
-        prefix,  # type: Optional[str]
-        pycompile  # type: bool
-    ):
-        # type: (...) -> List[str]
-        install_args = [sys.executable, "-u"]
-        install_args.append('-c')
-        install_args.append(SETUPTOOLS_SHIM % self.setup_py)
-        install_args += list(global_options) + \
-            ['install', '--record', record_filename]
-        install_args += ['--single-version-externally-managed']
-
-        if root is not None:
-            install_args += ['--root', root]
-        if prefix is not None:
-            install_args += ['--prefix', prefix]
-
-        if pycompile:
-            install_args += ["--compile"]
-        else:
-            install_args += ["--no-compile"]
-
-        if running_under_virtualenv():
-            py_ver_str = 'python' + sysconfig.get_python_version()
-            install_args += ['--install-headers',
-                             os.path.join(sys.prefix, 'include', 'site',
-                                          py_ver_str, self.name)]
-
-        return install_args
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/req/req_set.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/req/req_set.py
deleted file mode 100644
index d1410e9..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/req/req_set.py
+++ /dev/null
@@ -1,197 +0,0 @@
-from __future__ import absolute_import
-
-import logging
-from collections import OrderedDict
-
-from pip._internal.exceptions import InstallationError
-from pip._internal.utils.logging import indent_log
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-from pip._internal.wheel import Wheel
-
-if MYPY_CHECK_RUNNING:
-    from typing import Optional, List, Tuple, Dict, Iterable  # noqa: F401
-    from pip._internal.req.req_install import InstallRequirement  # noqa: F401
-
-
-logger = logging.getLogger(__name__)
-
-
-class RequirementSet(object):
-
-    def __init__(self, require_hashes=False, check_supported_wheels=True):
-        # type: (bool, bool) -> None
-        """Create a RequirementSet.
-        """
-
-        self.requirements = OrderedDict()  # type: Dict[str, InstallRequirement]  # noqa: E501
-        self.require_hashes = require_hashes
-        self.check_supported_wheels = check_supported_wheels
-
-        # Mapping of alias: real_name
-        self.requirement_aliases = {}  # type: Dict[str, str]
-        self.unnamed_requirements = []  # type: List[InstallRequirement]
-        self.successfully_downloaded = []  # type: List[InstallRequirement]
-        self.reqs_to_cleanup = []  # type: List[InstallRequirement]
-
-    def __str__(self):
-        reqs = [req for req in self.requirements.values()
-                if not req.comes_from]
-        reqs.sort(key=lambda req: req.name.lower())
-        return ' '.join([str(req.req) for req in reqs])
-
-    def __repr__(self):
-        reqs = [req for req in self.requirements.values()]
-        reqs.sort(key=lambda req: req.name.lower())
-        reqs_str = ', '.join([str(req.req) for req in reqs])
-        return ('<%s object; %d requirement(s): %s>'
-                % (self.__class__.__name__, len(reqs), reqs_str))
-
-    def add_requirement(
-        self,
-        install_req,  # type: InstallRequirement
-        parent_req_name=None,  # type: Optional[str]
-        extras_requested=None  # type: Optional[Iterable[str]]
-    ):
-        # type: (...) -> Tuple[List[InstallRequirement], Optional[InstallRequirement]]  # noqa: E501
-        """Add install_req as a requirement to install.
-
-        :param parent_req_name: The name of the requirement that needed this
-            added. The name is used because when multiple unnamed requirements
-            resolve to the same name, we could otherwise end up with dependency
-            links that point outside the Requirements set. parent_req must
-            already be added. Note that None implies that this is a user
-            supplied requirement, vs an inferred one.
-        :param extras_requested: an iterable of extras used to evaluate the
-            environment markers.
-        :return: Additional requirements to scan. That is either [] if
-            the requirement is not applicable, or [install_req] if the
-            requirement is applicable and has just been added.
-        """
-        name = install_req.name
-
-        # If the markers do not match, ignore this requirement.
-        if not install_req.match_markers(extras_requested):
-            logger.info(
-                "Ignoring %s: markers '%s' don't match your environment",
-                name, install_req.markers,
-            )
-            return [], None
-
-        # If the wheel is not supported, raise an error.
-        # Should check this after filtering out based on environment markers to
-        # allow specifying different wheels based on the environment/OS, in a
-        # single requirements file.
-        if install_req.link and install_req.link.is_wheel:
-            wheel = Wheel(install_req.link.filename)
-            if self.check_supported_wheels and not wheel.supported():
-                raise InstallationError(
-                    "%s is not a supported wheel on this platform." %
-                    wheel.filename
-                )
-
-        # This next bit is really a sanity check.
-        assert install_req.is_direct == (parent_req_name is None), (
-            "a direct req shouldn't have a parent and also, "
-            "a non direct req should have a parent"
-        )
-
-        # Unnamed requirements are scanned again and the requirement won't be
-        # added as a dependency until after scanning.
-        if not name:
-            # url or path requirement w/o an egg fragment
-            self.unnamed_requirements.append(install_req)
-            return [install_req], None
-
-        try:
-            existing_req = self.get_requirement(name)
-        except KeyError:
-            existing_req = None
-
-        has_conflicting_requirement = (
-            parent_req_name is None and
-            existing_req and
-            not existing_req.constraint and
-            existing_req.extras == install_req.extras and
-            existing_req.req.specifier != install_req.req.specifier
-        )
-        if has_conflicting_requirement:
-            raise InstallationError(
-                "Double requirement given: %s (already in %s, name=%r)"
-                % (install_req, existing_req, name)
-            )
-
-        # When no existing requirement exists, add the requirement as a
-        # dependency and it will be scanned again after.
-        if not existing_req:
-            self.requirements[name] = install_req
-            # FIXME: what about other normalizations?  E.g., _ vs. -?
-            if name.lower() != name:
-                self.requirement_aliases[name.lower()] = name
-            # We'd want to rescan this requirements later
-            return [install_req], install_req
-
-        # Assume there's no need to scan, and that we've already
-        # encountered this for scanning.
-        if install_req.constraint or not existing_req.constraint:
-            return [], existing_req
-
-        does_not_satisfy_constraint = (
-            install_req.link and
-            not (
-                existing_req.link and
-                install_req.link.path == existing_req.link.path
-            )
-        )
-        if does_not_satisfy_constraint:
-            self.reqs_to_cleanup.append(install_req)
-            raise InstallationError(
-                "Could not satisfy constraints for '%s': "
-                "installation from path or url cannot be "
-                "constrained to a version" % name,
-            )
-        # If we're now installing a constraint, mark the existing
-        # object for real installation.
-        existing_req.constraint = False
-        existing_req.extras = tuple(sorted(
-            set(existing_req.extras) | set(install_req.extras)
-        ))
-        logger.debug(
-            "Setting %s extras to: %s",
-            existing_req, existing_req.extras,
-        )
-        # Return the existing requirement for addition to the parent and
-        # scanning again.
-        return [existing_req], existing_req
-
-    def has_requirement(self, project_name):
-        # type: (str) -> bool
-        name = project_name.lower()
-        if (name in self.requirements and
-           not self.requirements[name].constraint or
-           name in self.requirement_aliases and
-           not self.requirements[self.requirement_aliases[name]].constraint):
-            return True
-        return False
-
-    @property
-    def has_requirements(self):
-        # type: () -> List[InstallRequirement]
-        return list(req for req in self.requirements.values() if not
-                    req.constraint) or self.unnamed_requirements
-
-    def get_requirement(self, project_name):
-        # type: (str) -> InstallRequirement
-        for name in project_name, project_name.lower():
-            if name in self.requirements:
-                return self.requirements[name]
-            if name in self.requirement_aliases:
-                return self.requirements[self.requirement_aliases[name]]
-        raise KeyError("No project with the name %r" % project_name)
-
-    def cleanup_files(self):
-        # type: () -> None
-        """Clean up files, remove builds."""
-        logger.debug('Cleaning up...')
-        with indent_log():
-            for req in self.reqs_to_cleanup:
-                req.remove_temporary_source()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/req/req_tracker.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/req/req_tracker.py
deleted file mode 100644
index 82e084a..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/req/req_tracker.py
+++ /dev/null
@@ -1,88 +0,0 @@
-from __future__ import absolute_import
-
-import contextlib
-import errno
-import hashlib
-import logging
-import os
-
-from pip._internal.utils.temp_dir import TempDirectory
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if MYPY_CHECK_RUNNING:
-    from typing import Set, Iterator  # noqa: F401
-    from pip._internal.req.req_install import InstallRequirement  # noqa: F401
-    from pip._internal.models.link import Link  # noqa: F401
-
-logger = logging.getLogger(__name__)
-
-
-class RequirementTracker(object):
-
-    def __init__(self):
-        # type: () -> None
-        self._root = os.environ.get('PIP_REQ_TRACKER')
-        if self._root is None:
-            self._temp_dir = TempDirectory(delete=False, kind='req-tracker')
-            self._temp_dir.create()
-            self._root = os.environ['PIP_REQ_TRACKER'] = self._temp_dir.path
-            logger.debug('Created requirements tracker %r', self._root)
-        else:
-            self._temp_dir = None
-            logger.debug('Re-using requirements tracker %r', self._root)
-        self._entries = set()  # type: Set[InstallRequirement]
-
-    def __enter__(self):
-        return self
-
-    def __exit__(self, exc_type, exc_val, exc_tb):
-        self.cleanup()
-
-    def _entry_path(self, link):
-        # type: (Link) -> str
-        hashed = hashlib.sha224(link.url_without_fragment.encode()).hexdigest()
-        return os.path.join(self._root, hashed)
-
-    def add(self, req):
-        # type: (InstallRequirement) -> None
-        link = req.link
-        info = str(req)
-        entry_path = self._entry_path(link)
-        try:
-            with open(entry_path) as fp:
-                # Error, these's already a build in progress.
-                raise LookupError('%s is already being built: %s'
-                                  % (link, fp.read()))
-        except IOError as e:
-            if e.errno != errno.ENOENT:
-                raise
-            assert req not in self._entries
-            with open(entry_path, 'w') as fp:
-                fp.write(info)
-            self._entries.add(req)
-            logger.debug('Added %s to build tracker %r', req, self._root)
-
-    def remove(self, req):
-        # type: (InstallRequirement) -> None
-        link = req.link
-        self._entries.remove(req)
-        os.unlink(self._entry_path(link))
-        logger.debug('Removed %s from build tracker %r', req, self._root)
-
-    def cleanup(self):
-        # type: () -> None
-        for req in set(self._entries):
-            self.remove(req)
-        remove = self._temp_dir is not None
-        if remove:
-            self._temp_dir.cleanup()
-        logger.debug('%s build tracker %r',
-                     'Removed' if remove else 'Cleaned',
-                     self._root)
-
-    @contextlib.contextmanager
-    def track(self, req):
-        # type: (InstallRequirement) -> Iterator[None]
-        self.add(req)
-        yield
-        self.remove(req)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/req/req_uninstall.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/req/req_uninstall.py
deleted file mode 100644
index c80959e..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/req/req_uninstall.py
+++ /dev/null
@@ -1,596 +0,0 @@
-from __future__ import absolute_import
-
-import csv
-import functools
-import logging
-import os
-import sys
-import sysconfig
-
-from pip._vendor import pkg_resources
-
-from pip._internal.exceptions import UninstallationError
-from pip._internal.locations import bin_py, bin_user
-from pip._internal.utils.compat import WINDOWS, cache_from_source, uses_pycache
-from pip._internal.utils.logging import indent_log
-from pip._internal.utils.misc import (
-    FakeFile, ask, dist_in_usersite, dist_is_local, egg_link_path, is_local,
-    normalize_path, renames, rmtree,
-)
-from pip._internal.utils.temp_dir import AdjacentTempDirectory, TempDirectory
-
-logger = logging.getLogger(__name__)
-
-
-def _script_names(dist, script_name, is_gui):
-    """Create the fully qualified name of the files created by
-    {console,gui}_scripts for the given ``dist``.
-    Returns the list of file names
-    """
-    if dist_in_usersite(dist):
-        bin_dir = bin_user
-    else:
-        bin_dir = bin_py
-    exe_name = os.path.join(bin_dir, script_name)
-    paths_to_remove = [exe_name]
-    if WINDOWS:
-        paths_to_remove.append(exe_name + '.exe')
-        paths_to_remove.append(exe_name + '.exe.manifest')
-        if is_gui:
-            paths_to_remove.append(exe_name + '-script.pyw')
-        else:
-            paths_to_remove.append(exe_name + '-script.py')
-    return paths_to_remove
-
-
-def _unique(fn):
-    @functools.wraps(fn)
-    def unique(*args, **kw):
-        seen = set()
-        for item in fn(*args, **kw):
-            if item not in seen:
-                seen.add(item)
-                yield item
-    return unique
-
-
-@_unique
-def uninstallation_paths(dist):
-    """
-    Yield all the uninstallation paths for dist based on RECORD-without-.py[co]
-
-    Yield paths to all the files in RECORD. For each .py file in RECORD, add
-    the .pyc and .pyo in the same directory.
-
-    UninstallPathSet.add() takes care of the __pycache__ .py[co].
-    """
-    r = csv.reader(FakeFile(dist.get_metadata_lines('RECORD')))
-    for row in r:
-        path = os.path.join(dist.location, row[0])
-        yield path
-        if path.endswith('.py'):
-            dn, fn = os.path.split(path)
-            base = fn[:-3]
-            path = os.path.join(dn, base + '.pyc')
-            yield path
-            path = os.path.join(dn, base + '.pyo')
-            yield path
-
-
-def compact(paths):
-    """Compact a path set to contain the minimal number of paths
-    necessary to contain all paths in the set. If /a/path/ and
-    /a/path/to/a/file.txt are both in the set, leave only the
-    shorter path."""
-
-    sep = os.path.sep
-    short_paths = set()
-    for path in sorted(paths, key=len):
-        should_skip = any(
-            path.startswith(shortpath.rstrip("*")) and
-            path[len(shortpath.rstrip("*").rstrip(sep))] == sep
-            for shortpath in short_paths
-        )
-        if not should_skip:
-            short_paths.add(path)
-    return short_paths
-
-
-def compress_for_rename(paths):
-    """Returns a set containing the paths that need to be renamed.
-
-    This set may include directories when the original sequence of paths
-    included every file on disk.
-    """
-    case_map = dict((os.path.normcase(p), p) for p in paths)
-    remaining = set(case_map)
-    unchecked = sorted(set(os.path.split(p)[0]
-                           for p in case_map.values()), key=len)
-    wildcards = set()
-
-    def norm_join(*a):
-        return os.path.normcase(os.path.join(*a))
-
-    for root in unchecked:
-        if any(os.path.normcase(root).startswith(w)
-               for w in wildcards):
-            # This directory has already been handled.
-            continue
-
-        all_files = set()
-        all_subdirs = set()
-        for dirname, subdirs, files in os.walk(root):
-            all_subdirs.update(norm_join(root, dirname, d)
-                               for d in subdirs)
-            all_files.update(norm_join(root, dirname, f)
-                             for f in files)
-        # If all the files we found are in our remaining set of files to
-        # remove, then remove them from the latter set and add a wildcard
-        # for the directory.
-        if not (all_files - remaining):
-            remaining.difference_update(all_files)
-            wildcards.add(root + os.sep)
-
-    return set(map(case_map.__getitem__, remaining)) | wildcards
-
-
-def compress_for_output_listing(paths):
-    """Returns a tuple of 2 sets of which paths to display to user
-
-    The first set contains paths that would be deleted. Files of a package
-    are not added and the top-level directory of the package has a '*' added
-    at the end - to signify that all it's contents are removed.
-
-    The second set contains files that would have been skipped in the above
-    folders.
-    """
-
-    will_remove = list(paths)
-    will_skip = set()
-
-    # Determine folders and files
-    folders = set()
-    files = set()
-    for path in will_remove:
-        if path.endswith(".pyc"):
-            continue
-        if path.endswith("__init__.py") or ".dist-info" in path:
-            folders.add(os.path.dirname(path))
-        files.add(path)
-
-    _normcased_files = set(map(os.path.normcase, files))
-
-    folders = compact(folders)
-
-    # This walks the tree using os.walk to not miss extra folders
-    # that might get added.
-    for folder in folders:
-        for dirpath, _, dirfiles in os.walk(folder):
-            for fname in dirfiles:
-                if fname.endswith(".pyc"):
-                    continue
-
-                file_ = os.path.join(dirpath, fname)
-                if (os.path.isfile(file_) and
-                        os.path.normcase(file_) not in _normcased_files):
-                    # We are skipping this file. Add it to the set.
-                    will_skip.add(file_)
-
-    will_remove = files | {
-        os.path.join(folder, "*") for folder in folders
-    }
-
-    return will_remove, will_skip
-
-
-class StashedUninstallPathSet(object):
-    """A set of file rename operations to stash files while
-    tentatively uninstalling them."""
-    def __init__(self):
-        # Mapping from source file root to [Adjacent]TempDirectory
-        # for files under that directory.
-        self._save_dirs = {}
-        # (old path, new path) tuples for each move that may need
-        # to be undone.
-        self._moves = []
-
-    def _get_directory_stash(self, path):
-        """Stashes a directory.
-
-        Directories are stashed adjacent to their original location if
-        possible, or else moved/copied into the user's temp dir."""
-
-        try:
-            save_dir = AdjacentTempDirectory(path)
-            save_dir.create()
-        except OSError:
-            save_dir = TempDirectory(kind="uninstall")
-            save_dir.create()
-        self._save_dirs[os.path.normcase(path)] = save_dir
-
-        return save_dir.path
-
-    def _get_file_stash(self, path):
-        """Stashes a file.
-
-        If no root has been provided, one will be created for the directory
-        in the user's temp directory."""
-        path = os.path.normcase(path)
-        head, old_head = os.path.dirname(path), None
-        save_dir = None
-
-        while head != old_head:
-            try:
-                save_dir = self._save_dirs[head]
-                break
-            except KeyError:
-                pass
-            head, old_head = os.path.dirname(head), head
-        else:
-            # Did not find any suitable root
-            head = os.path.dirname(path)
-            save_dir = TempDirectory(kind='uninstall')
-            save_dir.create()
-            self._save_dirs[head] = save_dir
-
-        relpath = os.path.relpath(path, head)
-        if relpath and relpath != os.path.curdir:
-            return os.path.join(save_dir.path, relpath)
-        return save_dir.path
-
-    def stash(self, path):
-        """Stashes the directory or file and returns its new location.
-        """
-        if os.path.isdir(path):
-            new_path = self._get_directory_stash(path)
-        else:
-            new_path = self._get_file_stash(path)
-
-        self._moves.append((path, new_path))
-        if os.path.isdir(path) and os.path.isdir(new_path):
-            # If we're moving a directory, we need to
-            # remove the destination first or else it will be
-            # moved to inside the existing directory.
-            # We just created new_path ourselves, so it will
-            # be removable.
-            os.rmdir(new_path)
-        renames(path, new_path)
-        return new_path
-
-    def commit(self):
-        """Commits the uninstall by removing stashed files."""
-        for _, save_dir in self._save_dirs.items():
-            save_dir.cleanup()
-        self._moves = []
-        self._save_dirs = {}
-
-    def rollback(self):
-        """Undoes the uninstall by moving stashed files back."""
-        for p in self._moves:
-            logging.info("Moving to %s\n from %s", *p)
-
-        for new_path, path in self._moves:
-            try:
-                logger.debug('Replacing %s from %s', new_path, path)
-                if os.path.isfile(new_path):
-                    os.unlink(new_path)
-                elif os.path.isdir(new_path):
-                    rmtree(new_path)
-                renames(path, new_path)
-            except OSError as ex:
-                logger.error("Failed to restore %s", new_path)
-                logger.debug("Exception: %s", ex)
-
-        self.commit()
-
-    @property
-    def can_rollback(self):
-        return bool(self._moves)
-
-
-class UninstallPathSet(object):
-    """A set of file paths to be removed in the uninstallation of a
-    requirement."""
-    def __init__(self, dist):
-        self.paths = set()
-        self._refuse = set()
-        self.pth = {}
-        self.dist = dist
-        self._moved_paths = StashedUninstallPathSet()
-
-    def _permitted(self, path):
-        """
-        Return True if the given path is one we are permitted to
-        remove/modify, False otherwise.
-
-        """
-        return is_local(path)
-
-    def add(self, path):
-        head, tail = os.path.split(path)
-
-        # we normalize the head to resolve parent directory symlinks, but not
-        # the tail, since we only want to uninstall symlinks, not their targets
-        path = os.path.join(normalize_path(head), os.path.normcase(tail))
-
-        if not os.path.exists(path):
-            return
-        if self._permitted(path):
-            self.paths.add(path)
-        else:
-            self._refuse.add(path)
-
-        # __pycache__ files can show up after 'installed-files.txt' is created,
-        # due to imports
-        if os.path.splitext(path)[1] == '.py' and uses_pycache:
-            self.add(cache_from_source(path))
-
-    def add_pth(self, pth_file, entry):
-        pth_file = normalize_path(pth_file)
-        if self._permitted(pth_file):
-            if pth_file not in self.pth:
-                self.pth[pth_file] = UninstallPthEntries(pth_file)
-            self.pth[pth_file].add(entry)
-        else:
-            self._refuse.add(pth_file)
-
-    def remove(self, auto_confirm=False, verbose=False):
-        """Remove paths in ``self.paths`` with confirmation (unless
-        ``auto_confirm`` is True)."""
-
-        if not self.paths:
-            logger.info(
-                "Can't uninstall '%s'. No files were found to uninstall.",
-                self.dist.project_name,
-            )
-            return
-
-        dist_name_version = (
-            self.dist.project_name + "-" + self.dist.version
-        )
-        logger.info('Uninstalling %s:', dist_name_version)
-
-        with indent_log():
-            if auto_confirm or self._allowed_to_proceed(verbose):
-                moved = self._moved_paths
-
-                for_rename = compress_for_rename(self.paths)
-
-                for path in sorted(compact(for_rename)):
-                    moved.stash(path)
-                    logger.debug('Removing file or directory %s', path)
-
-                for pth in self.pth.values():
-                    pth.remove()
-
-                logger.info('Successfully uninstalled %s', dist_name_version)
-
-    def _allowed_to_proceed(self, verbose):
-        """Display which files would be deleted and prompt for confirmation
-        """
-
-        def _display(msg, paths):
-            if not paths:
-                return
-
-            logger.info(msg)
-            with indent_log():
-                for path in sorted(compact(paths)):
-                    logger.info(path)
-
-        if not verbose:
-            will_remove, will_skip = compress_for_output_listing(self.paths)
-        else:
-            # In verbose mode, display all the files that are going to be
-            # deleted.
-            will_remove = list(self.paths)
-            will_skip = set()
-
-        _display('Would remove:', will_remove)
-        _display('Would not remove (might be manually added):', will_skip)
-        _display('Would not remove (outside of prefix):', self._refuse)
-        if verbose:
-            _display('Will actually move:', compress_for_rename(self.paths))
-
-        return ask('Proceed (y/n)? ', ('y', 'n')) == 'y'
-
-    def rollback(self):
-        """Rollback the changes previously made by remove()."""
-        if not self._moved_paths.can_rollback:
-            logger.error(
-                "Can't roll back %s; was not uninstalled",
-                self.dist.project_name,
-            )
-            return False
-        logger.info('Rolling back uninstall of %s', self.dist.project_name)
-        self._moved_paths.rollback()
-        for pth in self.pth.values():
-            pth.rollback()
-
-    def commit(self):
-        """Remove temporary save dir: rollback will no longer be possible."""
-        self._moved_paths.commit()
-
-    @classmethod
-    def from_dist(cls, dist):
-        dist_path = normalize_path(dist.location)
-        if not dist_is_local(dist):
-            logger.info(
-                "Not uninstalling %s at %s, outside environment %s",
-                dist.key,
-                dist_path,
-                sys.prefix,
-            )
-            return cls(dist)
-
-        if dist_path in {p for p in {sysconfig.get_path("stdlib"),
-                                     sysconfig.get_path("platstdlib")}
-                         if p}:
-            logger.info(
-                "Not uninstalling %s at %s, as it is in the standard library.",
-                dist.key,
-                dist_path,
-            )
-            return cls(dist)
-
-        paths_to_remove = cls(dist)
-        develop_egg_link = egg_link_path(dist)
-        develop_egg_link_egg_info = '{}.egg-info'.format(
-            pkg_resources.to_filename(dist.project_name))
-        egg_info_exists = dist.egg_info and os.path.exists(dist.egg_info)
-        # Special case for distutils installed package
-        distutils_egg_info = getattr(dist._provider, 'path', None)
-
-        # Uninstall cases order do matter as in the case of 2 installs of the
-        # same package, pip needs to uninstall the currently detected version
-        if (egg_info_exists and dist.egg_info.endswith('.egg-info') and
-                not dist.egg_info.endswith(develop_egg_link_egg_info)):
-            # if dist.egg_info.endswith(develop_egg_link_egg_info), we
-            # are in fact in the develop_egg_link case
-            paths_to_remove.add(dist.egg_info)
-            if dist.has_metadata('installed-files.txt'):
-                for installed_file in dist.get_metadata(
-                        'installed-files.txt').splitlines():
-                    path = os.path.normpath(
-                        os.path.join(dist.egg_info, installed_file)
-                    )
-                    paths_to_remove.add(path)
-            # FIXME: need a test for this elif block
-            # occurs with --single-version-externally-managed/--record outside
-            # of pip
-            elif dist.has_metadata('top_level.txt'):
-                if dist.has_metadata('namespace_packages.txt'):
-                    namespaces = dist.get_metadata('namespace_packages.txt')
-                else:
-                    namespaces = []
-                for top_level_pkg in [
-                        p for p
-                        in dist.get_metadata('top_level.txt').splitlines()
-                        if p and p not in namespaces]:
-                    path = os.path.join(dist.location, top_level_pkg)
-                    paths_to_remove.add(path)
-                    paths_to_remove.add(path + '.py')
-                    paths_to_remove.add(path + '.pyc')
-                    paths_to_remove.add(path + '.pyo')
-
-        elif distutils_egg_info:
-            raise UninstallationError(
-                "Cannot uninstall {!r}. It is a distutils installed project "
-                "and thus we cannot accurately determine which files belong "
-                "to it which would lead to only a partial uninstall.".format(
-                    dist.project_name,
-                )
-            )
-
-        elif dist.location.endswith('.egg'):
-            # package installed by easy_install
-            # We cannot match on dist.egg_name because it can slightly vary
-            # i.e. setuptools-0.6c11-py2.6.egg vs setuptools-0.6rc11-py2.6.egg
-            paths_to_remove.add(dist.location)
-            easy_install_egg = os.path.split(dist.location)[1]
-            easy_install_pth = os.path.join(os.path.dirname(dist.location),
-                                            'easy-install.pth')
-            paths_to_remove.add_pth(easy_install_pth, './' + easy_install_egg)
-
-        elif egg_info_exists and dist.egg_info.endswith('.dist-info'):
-            for path in uninstallation_paths(dist):
-                paths_to_remove.add(path)
-
-        elif develop_egg_link:
-            # develop egg
-            with open(develop_egg_link, 'r') as fh:
-                link_pointer = os.path.normcase(fh.readline().strip())
-            assert (link_pointer == dist.location), (
-                'Egg-link %s does not match installed location of %s '
-                '(at %s)' % (link_pointer, dist.project_name, dist.location)
-            )
-            paths_to_remove.add(develop_egg_link)
-            easy_install_pth = os.path.join(os.path.dirname(develop_egg_link),
-                                            'easy-install.pth')
-            paths_to_remove.add_pth(easy_install_pth, dist.location)
-
-        else:
-            logger.debug(
-                'Not sure how to uninstall: %s - Check: %s',
-                dist, dist.location,
-            )
-
-        # find distutils scripts= scripts
-        if dist.has_metadata('scripts') and dist.metadata_isdir('scripts'):
-            for script in dist.metadata_listdir('scripts'):
-                if dist_in_usersite(dist):
-                    bin_dir = bin_user
-                else:
-                    bin_dir = bin_py
-                paths_to_remove.add(os.path.join(bin_dir, script))
-                if WINDOWS:
-                    paths_to_remove.add(os.path.join(bin_dir, script) + '.bat')
-
-        # find console_scripts
-        _scripts_to_remove = []
-        console_scripts = dist.get_entry_map(group='console_scripts')
-        for name in console_scripts.keys():
-            _scripts_to_remove.extend(_script_names(dist, name, False))
-        # find gui_scripts
-        gui_scripts = dist.get_entry_map(group='gui_scripts')
-        for name in gui_scripts.keys():
-            _scripts_to_remove.extend(_script_names(dist, name, True))
-
-        for s in _scripts_to_remove:
-            paths_to_remove.add(s)
-
-        return paths_to_remove
-
-
-class UninstallPthEntries(object):
-    def __init__(self, pth_file):
-        if not os.path.isfile(pth_file):
-            raise UninstallationError(
-                "Cannot remove entries from nonexistent file %s" % pth_file
-            )
-        self.file = pth_file
-        self.entries = set()
-        self._saved_lines = None
-
-    def add(self, entry):
-        entry = os.path.normcase(entry)
-        # On Windows, os.path.normcase converts the entry to use
-        # backslashes.  This is correct for entries that describe absolute
-        # paths outside of site-packages, but all the others use forward
-        # slashes.
-        if WINDOWS and not os.path.splitdrive(entry)[0]:
-            entry = entry.replace('\\', '/')
-        self.entries.add(entry)
-
-    def remove(self):
-        logger.debug('Removing pth entries from %s:', self.file)
-        with open(self.file, 'rb') as fh:
-            # windows uses '\r\n' with py3k, but uses '\n' with py2.x
-            lines = fh.readlines()
-            self._saved_lines = lines
-        if any(b'\r\n' in line for line in lines):
-            endline = '\r\n'
-        else:
-            endline = '\n'
-        # handle missing trailing newline
-        if lines and not lines[-1].endswith(endline.encode("utf-8")):
-            lines[-1] = lines[-1] + endline.encode("utf-8")
-        for entry in self.entries:
-            try:
-                logger.debug('Removing entry: %s', entry)
-                lines.remove((entry + endline).encode("utf-8"))
-            except ValueError:
-                pass
-        with open(self.file, 'wb') as fh:
-            fh.writelines(lines)
-
-    def rollback(self):
-        if self._saved_lines is None:
-            logger.error(
-                'Cannot roll back changes to %s, none were made', self.file
-            )
-            return False
-        logger.debug('Rolling %s back to previous state', self.file)
-        with open(self.file, 'wb') as fh:
-            fh.writelines(self._saved_lines)
-        return True
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/resolve.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/resolve.py
deleted file mode 100644
index 33f572f..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/resolve.py
+++ /dev/null
@@ -1,393 +0,0 @@
-"""Dependency Resolution
-
-The dependency resolution in pip is performed as follows:
-
-for top-level requirements:
-    a. only one spec allowed per project, regardless of conflicts or not.
-       otherwise a "double requirement" exception is raised
-    b. they override sub-dependency requirements.
-for sub-dependencies
-    a. "first found, wins" (where the order is breadth first)
-"""
-
-import logging
-from collections import defaultdict
-from itertools import chain
-
-from pip._internal.exceptions import (
-    BestVersionAlreadyInstalled, DistributionNotFound, HashError, HashErrors,
-    UnsupportedPythonVersion,
-)
-from pip._internal.req.constructors import install_req_from_req_string
-from pip._internal.utils.logging import indent_log
-from pip._internal.utils.misc import dist_in_usersite, ensure_dir
-from pip._internal.utils.packaging import check_dist_requires_python
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if MYPY_CHECK_RUNNING:
-    from typing import Optional, DefaultDict, List, Set  # noqa: F401
-    from pip._internal.download import PipSession  # noqa: F401
-    from pip._internal.req.req_install import InstallRequirement  # noqa: F401
-    from pip._internal.index import PackageFinder  # noqa: F401
-    from pip._internal.req.req_set import RequirementSet  # noqa: F401
-    from pip._internal.operations.prepare import (  # noqa: F401
-        DistAbstraction, RequirementPreparer
-    )
-    from pip._internal.cache import WheelCache  # noqa: F401
-
-logger = logging.getLogger(__name__)
-
-
-class Resolver(object):
-    """Resolves which packages need to be installed/uninstalled to perform \
-    the requested operation without breaking the requirements of any package.
-    """
-
-    _allowed_strategies = {"eager", "only-if-needed", "to-satisfy-only"}
-
-    def __init__(
-        self,
-        preparer,  # type: RequirementPreparer
-        session,  # type: PipSession
-        finder,  # type: PackageFinder
-        wheel_cache,  # type: Optional[WheelCache]
-        use_user_site,  # type: bool
-        ignore_dependencies,  # type: bool
-        ignore_installed,  # type: bool
-        ignore_requires_python,  # type: bool
-        force_reinstall,  # type: bool
-        isolated,  # type: bool
-        upgrade_strategy,  # type: str
-        use_pep517=None  # type: Optional[bool]
-    ):
-        # type: (...) -> None
-        super(Resolver, self).__init__()
-        assert upgrade_strategy in self._allowed_strategies
-
-        self.preparer = preparer
-        self.finder = finder
-        self.session = session
-
-        # NOTE: This would eventually be replaced with a cache that can give
-        #       information about both sdist and wheels transparently.
-        self.wheel_cache = wheel_cache
-
-        # This is set in resolve
-        self.require_hashes = None  # type: Optional[bool]
-
-        self.upgrade_strategy = upgrade_strategy
-        self.force_reinstall = force_reinstall
-        self.isolated = isolated
-        self.ignore_dependencies = ignore_dependencies
-        self.ignore_installed = ignore_installed
-        self.ignore_requires_python = ignore_requires_python
-        self.use_user_site = use_user_site
-        self.use_pep517 = use_pep517
-
-        self._discovered_dependencies = \
-            defaultdict(list)  # type: DefaultDict[str, List]
-
-    def resolve(self, requirement_set):
-        # type: (RequirementSet) -> None
-        """Resolve what operations need to be done
-
-        As a side-effect of this method, the packages (and their dependencies)
-        are downloaded, unpacked and prepared for installation. This
-        preparation is done by ``pip.operations.prepare``.
-
-        Once PyPI has static dependency metadata available, it would be
-        possible to move the preparation to become a step separated from
-        dependency resolution.
-        """
-        # make the wheelhouse
-        if self.preparer.wheel_download_dir:
-            ensure_dir(self.preparer.wheel_download_dir)
-
-        # If any top-level requirement has a hash specified, enter
-        # hash-checking mode, which requires hashes from all.
-        root_reqs = (
-            requirement_set.unnamed_requirements +
-            list(requirement_set.requirements.values())
-        )
-        self.require_hashes = (
-            requirement_set.require_hashes or
-            any(req.has_hash_options for req in root_reqs)
-        )
-
-        # Display where finder is looking for packages
-        locations = self.finder.get_formatted_locations()
-        if locations:
-            logger.info(locations)
-
-        # Actually prepare the files, and collect any exceptions. Most hash
-        # exceptions cannot be checked ahead of time, because
-        # req.populate_link() needs to be called before we can make decisions
-        # based on link type.
-        discovered_reqs = []  # type: List[InstallRequirement]
-        hash_errors = HashErrors()
-        for req in chain(root_reqs, discovered_reqs):
-            try:
-                discovered_reqs.extend(
-                    self._resolve_one(requirement_set, req)
-                )
-            except HashError as exc:
-                exc.req = req
-                hash_errors.append(exc)
-
-        if hash_errors:
-            raise hash_errors
-
-    def _is_upgrade_allowed(self, req):
-        # type: (InstallRequirement) -> bool
-        if self.upgrade_strategy == "to-satisfy-only":
-            return False
-        elif self.upgrade_strategy == "eager":
-            return True
-        else:
-            assert self.upgrade_strategy == "only-if-needed"
-            return req.is_direct
-
-    def _set_req_to_reinstall(self, req):
-        # type: (InstallRequirement) -> None
-        """
-        Set a requirement to be installed.
-        """
-        # Don't uninstall the conflict if doing a user install and the
-        # conflict is not a user install.
-        if not self.use_user_site or dist_in_usersite(req.satisfied_by):
-            req.conflicts_with = req.satisfied_by
-        req.satisfied_by = None
-
-    # XXX: Stop passing requirement_set for options
-    def _check_skip_installed(self, req_to_install):
-        # type: (InstallRequirement) -> Optional[str]
-        """Check if req_to_install should be skipped.
-
-        This will check if the req is installed, and whether we should upgrade
-        or reinstall it, taking into account all the relevant user options.
-
-        After calling this req_to_install will only have satisfied_by set to
-        None if the req_to_install is to be upgraded/reinstalled etc. Any
-        other value will be a dist recording the current thing installed that
-        satisfies the requirement.
-
-        Note that for vcs urls and the like we can't assess skipping in this
-        routine - we simply identify that we need to pull the thing down,
-        then later on it is pulled down and introspected to assess upgrade/
-        reinstalls etc.
-
-        :return: A text reason for why it was skipped, or None.
-        """
-        if self.ignore_installed:
-            return None
-
-        req_to_install.check_if_exists(self.use_user_site)
-        if not req_to_install.satisfied_by:
-            return None
-
-        if self.force_reinstall:
-            self._set_req_to_reinstall(req_to_install)
-            return None
-
-        if not self._is_upgrade_allowed(req_to_install):
-            if self.upgrade_strategy == "only-if-needed":
-                return 'already satisfied, skipping upgrade'
-            return 'already satisfied'
-
-        # Check for the possibility of an upgrade.  For link-based
-        # requirements we have to pull the tree down and inspect to assess
-        # the version #, so it's handled way down.
-        if not req_to_install.link:
-            try:
-                self.finder.find_requirement(req_to_install, upgrade=True)
-            except BestVersionAlreadyInstalled:
-                # Then the best version is installed.
-                return 'already up-to-date'
-            except DistributionNotFound:
-                # No distribution found, so we squash the error.  It will
-                # be raised later when we re-try later to do the install.
-                # Why don't we just raise here?
-                pass
-
-        self._set_req_to_reinstall(req_to_install)
-        return None
-
-    def _get_abstract_dist_for(self, req):
-        # type: (InstallRequirement) -> DistAbstraction
-        """Takes a InstallRequirement and returns a single AbstractDist \
-        representing a prepared variant of the same.
-        """
-        assert self.require_hashes is not None, (
-            "require_hashes should have been set in Resolver.resolve()"
-        )
-
-        if req.editable:
-            return self.preparer.prepare_editable_requirement(
-                req, self.require_hashes, self.use_user_site, self.finder,
-            )
-
-        # satisfied_by is only evaluated by calling _check_skip_installed,
-        # so it must be None here.
-        assert req.satisfied_by is None
-        skip_reason = self._check_skip_installed(req)
-
-        if req.satisfied_by:
-            return self.preparer.prepare_installed_requirement(
-                req, self.require_hashes, skip_reason
-            )
-
-        upgrade_allowed = self._is_upgrade_allowed(req)
-        abstract_dist = self.preparer.prepare_linked_requirement(
-            req, self.session, self.finder, upgrade_allowed,
-            self.require_hashes
-        )
-
-        # NOTE
-        # The following portion is for determining if a certain package is
-        # going to be re-installed/upgraded or not and reporting to the user.
-        # This should probably get cleaned up in a future refactor.
-
-        # req.req is only avail after unpack for URL
-        # pkgs repeat check_if_exists to uninstall-on-upgrade
-        # (#14)
-        if not self.ignore_installed:
-            req.check_if_exists(self.use_user_site)
-
-        if req.satisfied_by:
-            should_modify = (
-                self.upgrade_strategy != "to-satisfy-only" or
-                self.force_reinstall or
-                self.ignore_installed or
-                req.link.scheme == 'file'
-            )
-            if should_modify:
-                self._set_req_to_reinstall(req)
-            else:
-                logger.info(
-                    'Requirement already satisfied (use --upgrade to upgrade):'
-                    ' %s', req,
-                )
-
-        return abstract_dist
-
-    def _resolve_one(
-        self,
-        requirement_set,  # type: RequirementSet
-        req_to_install  # type: InstallRequirement
-    ):
-        # type: (...) -> List[InstallRequirement]
-        """Prepare a single requirements file.
-
-        :return: A list of additional InstallRequirements to also install.
-        """
-        # Tell user what we are doing for this requirement:
-        # obtain (editable), skipping, processing (local url), collecting
-        # (remote url or package name)
-        if req_to_install.constraint or req_to_install.prepared:
-            return []
-
-        req_to_install.prepared = True
-
-        # register tmp src for cleanup in case something goes wrong
-        requirement_set.reqs_to_cleanup.append(req_to_install)
-
-        abstract_dist = self._get_abstract_dist_for(req_to_install)
-
-        # Parse and return dependencies
-        dist = abstract_dist.dist()
-        try:
-            check_dist_requires_python(dist)
-        except UnsupportedPythonVersion as err:
-            if self.ignore_requires_python:
-                logger.warning(err.args[0])
-            else:
-                raise
-
-        more_reqs = []  # type: List[InstallRequirement]
-
-        def add_req(subreq, extras_requested):
-            sub_install_req = install_req_from_req_string(
-                str(subreq),
-                req_to_install,
-                isolated=self.isolated,
-                wheel_cache=self.wheel_cache,
-                use_pep517=self.use_pep517
-            )
-            parent_req_name = req_to_install.name
-            to_scan_again, add_to_parent = requirement_set.add_requirement(
-                sub_install_req,
-                parent_req_name=parent_req_name,
-                extras_requested=extras_requested,
-            )
-            if parent_req_name and add_to_parent:
-                self._discovered_dependencies[parent_req_name].append(
-                    add_to_parent
-                )
-            more_reqs.extend(to_scan_again)
-
-        with indent_log():
-            # We add req_to_install before its dependencies, so that we
-            # can refer to it when adding dependencies.
-            if not requirement_set.has_requirement(req_to_install.name):
-                # 'unnamed' requirements will get added here
-                req_to_install.is_direct = True
-                requirement_set.add_requirement(
-                    req_to_install, parent_req_name=None,
-                )
-
-            if not self.ignore_dependencies:
-                if req_to_install.extras:
-                    logger.debug(
-                        "Installing extra requirements: %r",
-                        ','.join(req_to_install.extras),
-                    )
-                missing_requested = sorted(
-                    set(req_to_install.extras) - set(dist.extras)
-                )
-                for missing in missing_requested:
-                    logger.warning(
-                        '%s does not provide the extra \'%s\'',
-                        dist, missing
-                    )
-
-                available_requested = sorted(
-                    set(dist.extras) & set(req_to_install.extras)
-                )
-                for subreq in dist.requires(available_requested):
-                    add_req(subreq, extras_requested=available_requested)
-
-            if not req_to_install.editable and not req_to_install.satisfied_by:
-                # XXX: --no-install leads this to report 'Successfully
-                # downloaded' for only non-editable reqs, even though we took
-                # action on them.
-                requirement_set.successfully_downloaded.append(req_to_install)
-
-        return more_reqs
-
-    def get_installation_order(self, req_set):
-        # type: (RequirementSet) -> List[InstallRequirement]
-        """Create the installation order.
-
-        The installation order is topological - requirements are installed
-        before the requiring thing. We break cycles at an arbitrary point,
-        and make no other guarantees.
-        """
-        # The current implementation, which we may change at any point
-        # installs the user specified things in the order given, except when
-        # dependencies must come earlier to achieve topological order.
-        order = []
-        ordered_reqs = set()  # type: Set[InstallRequirement]
-
-        def schedule(req):
-            if req.satisfied_by or req in ordered_reqs:
-                return
-            if req.constraint:
-                return
-            ordered_reqs.add(req)
-            for dep in self._discovered_dependencies[req.name]:
-                schedule(dep)
-            order.append(req)
-
-        for install_req in req_set.requirements.values():
-            schedule(install_req)
-        return order
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/__init__.py
deleted file mode 100644
index e69de29..0000000
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/appdirs.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/appdirs.py
deleted file mode 100644
index 9af9fa7..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/appdirs.py
+++ /dev/null
@@ -1,270 +0,0 @@
-"""
-This code was taken from https://github.com/ActiveState/appdirs and modified
-to suit our purposes.
-"""
-from __future__ import absolute_import
-
-import os
-import sys
-
-from pip._vendor.six import PY2, text_type
-
-from pip._internal.utils.compat import WINDOWS, expanduser
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if MYPY_CHECK_RUNNING:
-    from typing import (  # noqa: F401
-        List, Union
-    )
-
-
-def user_cache_dir(appname):
-    # type: (str) -> str
-    r"""
-    Return full path to the user-specific cache dir for this application.
-
-        "appname" is the name of application.
-
-    Typical user cache directories are:
-        macOS:      ~/Library/Caches/<AppName>
-        Unix:       ~/.cache/<AppName> (XDG default)
-        Windows:    C:\Users\<username>\AppData\Local\<AppName>\Cache
-
-    On Windows the only suggestion in the MSDN docs is that local settings go
-    in the `CSIDL_LOCAL_APPDATA` directory. This is identical to the
-    non-roaming app data dir (the default returned by `user_data_dir`). Apps
-    typically put cache data somewhere *under* the given dir here. Some
-    examples:
-        ...\Mozilla\Firefox\Profiles\<ProfileName>\Cache
-        ...\Acme\SuperApp\Cache\1.0
-
-    OPINION: This function appends "Cache" to the `CSIDL_LOCAL_APPDATA` value.
-    """
-    if WINDOWS:
-        # Get the base path
-        path = os.path.normpath(_get_win_folder("CSIDL_LOCAL_APPDATA"))
-
-        # When using Python 2, return paths as bytes on Windows like we do on
-        # other operating systems. See helper function docs for more details.
-        if PY2 and isinstance(path, text_type):
-            path = _win_path_to_bytes(path)
-
-        # Add our app name and Cache directory to it
-        path = os.path.join(path, appname, "Cache")
-    elif sys.platform == "darwin":
-        # Get the base path
-        path = expanduser("~/Library/Caches")
-
-        # Add our app name to it
-        path = os.path.join(path, appname)
-    else:
-        # Get the base path
-        path = os.getenv("XDG_CACHE_HOME", expanduser("~/.cache"))
-
-        # Add our app name to it
-        path = os.path.join(path, appname)
-
-    return path
-
-
-def user_data_dir(appname, roaming=False):
-    # type: (str, bool) -> str
-    r"""
-    Return full path to the user-specific data dir for this application.
-
-        "appname" is the name of application.
-            If None, just the system directory is returned.
-        "roaming" (boolean, default False) can be set True to use the Windows
-            roaming appdata directory. That means that for users on a Windows
-            network setup for roaming profiles, this user data will be
-            sync'd on login. See
-            <http://technet.microsoft.com/en-us/library/cc766489(WS.10).aspx>
-            for a discussion of issues.
-
-    Typical user data directories are:
-        macOS:                  ~/Library/Application Support/<AppName>
-                                if it exists, else ~/.config/<AppName>
-        Unix:                   ~/.local/share/<AppName>    # or in
-                                $XDG_DATA_HOME, if defined
-        Win XP (not roaming):   C:\Documents and Settings\<username>\ ...
-                                ...Application Data\<AppName>
-        Win XP (roaming):       C:\Documents and Settings\<username>\Local ...
-                                ...Settings\Application Data\<AppName>
-        Win 7  (not roaming):   C:\\Users\<username>\AppData\Local\<AppName>
-        Win 7  (roaming):       C:\\Users\<username>\AppData\Roaming\<AppName>
-
-    For Unix, we follow the XDG spec and support $XDG_DATA_HOME.
-    That means, by default "~/.local/share/<AppName>".
-    """
-    if WINDOWS:
-        const = roaming and "CSIDL_APPDATA" or "CSIDL_LOCAL_APPDATA"
-        path = os.path.join(os.path.normpath(_get_win_folder(const)), appname)
-    elif sys.platform == "darwin":
-        path = os.path.join(
-            expanduser('~/Library/Application Support/'),
-            appname,
-        ) if os.path.isdir(os.path.join(
-            expanduser('~/Library/Application Support/'),
-            appname,
-        )
-        ) else os.path.join(
-            expanduser('~/.config/'),
-            appname,
-        )
-    else:
-        path = os.path.join(
-            os.getenv('XDG_DATA_HOME', expanduser("~/.local/share")),
-            appname,
-        )
-
-    return path
-
-
-def user_config_dir(appname, roaming=True):
-    # type: (str, bool) -> str
-    """Return full path to the user-specific config dir for this application.
-
-        "appname" is the name of application.
-            If None, just the system directory is returned.
-        "roaming" (boolean, default True) can be set False to not use the
-            Windows roaming appdata directory. That means that for users on a
-            Windows network setup for roaming profiles, this user data will be
-            sync'd on login. See
-            <http://technet.microsoft.com/en-us/library/cc766489(WS.10).aspx>
-            for a discussion of issues.
-
-    Typical user data directories are:
-        macOS:                  same as user_data_dir
-        Unix:                   ~/.config/<AppName>
-        Win *:                  same as user_data_dir
-
-    For Unix, we follow the XDG spec and support $XDG_CONFIG_HOME.
-    That means, by default "~/.config/<AppName>".
-    """
-    if WINDOWS:
-        path = user_data_dir(appname, roaming=roaming)
-    elif sys.platform == "darwin":
-        path = user_data_dir(appname)
-    else:
-        path = os.getenv('XDG_CONFIG_HOME', expanduser("~/.config"))
-        path = os.path.join(path, appname)
-
-    return path
-
-
-# for the discussion regarding site_config_dirs locations
-# see <https://github.com/pypa/pip/issues/1733>
-def site_config_dirs(appname):
-    # type: (str) -> List[str]
-    r"""Return a list of potential user-shared config dirs for this application.
-
-        "appname" is the name of application.
-
-    Typical user config directories are:
-        macOS:      /Library/Application Support/<AppName>/
-        Unix:       /etc or $XDG_CONFIG_DIRS[i]/<AppName>/ for each value in
-                    $XDG_CONFIG_DIRS
-        Win XP:     C:\Documents and Settings\All Users\Application ...
-                    ...Data\<AppName>\
-        Vista:      (Fail! "C:\ProgramData" is a hidden *system* directory
-                    on Vista.)
-        Win 7:      Hidden, but writeable on Win 7:
-                    C:\ProgramData\<AppName>\
-    """
-    if WINDOWS:
-        path = os.path.normpath(_get_win_folder("CSIDL_COMMON_APPDATA"))
-        pathlist = [os.path.join(path, appname)]
-    elif sys.platform == 'darwin':
-        pathlist = [os.path.join('/Library/Application Support', appname)]
-    else:
-        # try looking in $XDG_CONFIG_DIRS
-        xdg_config_dirs = os.getenv('XDG_CONFIG_DIRS', '/etc/xdg')
-        if xdg_config_dirs:
-            pathlist = [
-                os.path.join(expanduser(x), appname)
-                for x in xdg_config_dirs.split(os.pathsep)
-            ]
-        else:
-            pathlist = []
-
-        # always look in /etc directly as well
-        pathlist.append('/etc')
-
-    return pathlist
-
-
-# -- Windows support functions --
-
-def _get_win_folder_from_registry(csidl_name):
-    # type: (str) -> str
-    """
-    This is a fallback technique at best. I'm not sure if using the
-    registry for this guarantees us the correct answer for all CSIDL_*
-    names.
-    """
-    import _winreg
-
-    shell_folder_name = {
-        "CSIDL_APPDATA": "AppData",
-        "CSIDL_COMMON_APPDATA": "Common AppData",
-        "CSIDL_LOCAL_APPDATA": "Local AppData",
-    }[csidl_name]
-
-    key = _winreg.OpenKey(
-        _winreg.HKEY_CURRENT_USER,
-        r"Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders"
-    )
-    directory, _type = _winreg.QueryValueEx(key, shell_folder_name)
-    return directory
-
-
-def _get_win_folder_with_ctypes(csidl_name):
-    # type: (str) -> str
-    csidl_const = {
-        "CSIDL_APPDATA": 26,
-        "CSIDL_COMMON_APPDATA": 35,
-        "CSIDL_LOCAL_APPDATA": 28,
-    }[csidl_name]
-
-    buf = ctypes.create_unicode_buffer(1024)
-    ctypes.windll.shell32.SHGetFolderPathW(None, csidl_const, None, 0, buf)
-
-    # Downgrade to short path name if have highbit chars. See
-    # <http://bugs.activestate.com/show_bug.cgi?id=85099>.
-    has_high_char = False
-    for c in buf:
-        if ord(c) > 255:
-            has_high_char = True
-            break
-    if has_high_char:
-        buf2 = ctypes.create_unicode_buffer(1024)
-        if ctypes.windll.kernel32.GetShortPathNameW(buf.value, buf2, 1024):
-            buf = buf2
-
-    return buf.value
-
-
-if WINDOWS:
-    try:
-        import ctypes
-        _get_win_folder = _get_win_folder_with_ctypes
-    except ImportError:
-        _get_win_folder = _get_win_folder_from_registry
-
-
-def _win_path_to_bytes(path):
-    """Encode Windows paths to bytes. Only used on Python 2.
-
-    Motivation is to be consistent with other operating systems where paths
-    are also returned as bytes. This avoids problems mixing bytes and Unicode
-    elsewhere in the codebase. For more details and discussion see
-    <https://github.com/pypa/pip/issues/3463>.
-
-    If encoding using ASCII and MBCS fails, return the original Unicode path.
-    """
-    for encoding in ('ASCII', 'MBCS'):
-        try:
-            return path.encode(encoding)
-        except (UnicodeEncodeError, LookupError):
-            pass
-    return path
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/compat.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/compat.py
deleted file mode 100644
index 2d8b3bf..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/compat.py
+++ /dev/null
@@ -1,264 +0,0 @@
-"""Stuff that differs in different Python versions and platform
-distributions."""
-from __future__ import absolute_import, division
-
-import codecs
-import locale
-import logging
-import os
-import shutil
-import sys
-
-from pip._vendor.six import text_type
-
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if MYPY_CHECK_RUNNING:
-    from typing import Tuple, Text  # noqa: F401
-
-try:
-    import ipaddress
-except ImportError:
-    try:
-        from pip._vendor import ipaddress  # type: ignore
-    except ImportError:
-        import ipaddr as ipaddress  # type: ignore
-        ipaddress.ip_address = ipaddress.IPAddress  # type: ignore
-        ipaddress.ip_network = ipaddress.IPNetwork  # type: ignore
-
-
-__all__ = [
-    "ipaddress", "uses_pycache", "console_to_str", "native_str",
-    "get_path_uid", "stdlib_pkgs", "WINDOWS", "samefile", "get_terminal_size",
-    "get_extension_suffixes",
-]
-
-
-logger = logging.getLogger(__name__)
-
-if sys.version_info >= (3, 4):
-    uses_pycache = True
-    from importlib.util import cache_from_source
-else:
-    import imp
-
-    try:
-        cache_from_source = imp.cache_from_source  # type: ignore
-    except AttributeError:
-        # does not use __pycache__
-        cache_from_source = None
-
-    uses_pycache = cache_from_source is not None
-
-
-if sys.version_info >= (3, 5):
-    backslashreplace_decode = "backslashreplace"
-else:
-    # In version 3.4 and older, backslashreplace exists
-    # but does not support use for decoding.
-    # We implement our own replace handler for this
-    # situation, so that we can consistently use
-    # backslash replacement for all versions.
-    def backslashreplace_decode_fn(err):
-        raw_bytes = (err.object[i] for i in range(err.start, err.end))
-        if sys.version_info[0] == 2:
-            # Python 2 gave us characters - convert to numeric bytes
-            raw_bytes = (ord(b) for b in raw_bytes)
-        return u"".join(u"\\x%x" % c for c in raw_bytes), err.end
-    codecs.register_error(
-        "backslashreplace_decode",
-        backslashreplace_decode_fn,
-    )
-    backslashreplace_decode = "backslashreplace_decode"
-
-
-def console_to_str(data):
-    # type: (bytes) -> Text
-    """Return a string, safe for output, of subprocess output.
-
-    We assume the data is in the locale preferred encoding.
-    If it won't decode properly, we warn the user but decode as
-    best we can.
-
-    We also ensure that the output can be safely written to
-    standard output without encoding errors.
-    """
-
-    # First, get the encoding we assume. This is the preferred
-    # encoding for the locale, unless that is not found, or
-    # it is ASCII, in which case assume UTF-8
-    encoding = locale.getpreferredencoding()
-    if (not encoding) or codecs.lookup(encoding).name == "ascii":
-        encoding = "utf-8"
-
-    # Now try to decode the data - if we fail, warn the user and
-    # decode with replacement.
-    try:
-        decoded_data = data.decode(encoding)
-    except UnicodeDecodeError:
-        logger.warning(
-            "Subprocess output does not appear to be encoded as %s",
-            encoding,
-        )
-        decoded_data = data.decode(encoding, errors=backslashreplace_decode)
-
-    # Make sure we can print the output, by encoding it to the output
-    # encoding with replacement of unencodable characters, and then
-    # decoding again.
-    # We use stderr's encoding because it's less likely to be
-    # redirected and if we don't find an encoding we skip this
-    # step (on the assumption that output is wrapped by something
-    # that won't fail).
-    # The double getattr is to deal with the possibility that we're
-    # being called in a situation where sys.__stderr__ doesn't exist,
-    # or doesn't have an encoding attribute. Neither of these cases
-    # should occur in normal pip use, but there's no harm in checking
-    # in case people use pip in (unsupported) unusual situations.
-    output_encoding = getattr(getattr(sys, "__stderr__", None),
-                              "encoding", None)
-
-    if output_encoding:
-        output_encoded = decoded_data.encode(
-            output_encoding,
-            errors="backslashreplace"
-        )
-        decoded_data = output_encoded.decode(output_encoding)
-
-    return decoded_data
-
-
-if sys.version_info >= (3,):
-    def native_str(s, replace=False):
-        # type: (str, bool) -> str
-        if isinstance(s, bytes):
-            return s.decode('utf-8', 'replace' if replace else 'strict')
-        return s
-
-else:
-    def native_str(s, replace=False):
-        # type: (str, bool) -> str
-        # Replace is ignored -- unicode to UTF-8 can't fail
-        if isinstance(s, text_type):
-            return s.encode('utf-8')
-        return s
-
-
-def get_path_uid(path):
-    # type: (str) -> int
-    """
-    Return path's uid.
-
-    Does not follow symlinks:
-        https://github.com/pypa/pip/pull/935#discussion_r5307003
-
-    Placed this function in compat due to differences on AIX and
-    Jython, that should eventually go away.
-
-    :raises OSError: When path is a symlink or can't be read.
-    """
-    if hasattr(os, 'O_NOFOLLOW'):
-        fd = os.open(path, os.O_RDONLY | os.O_NOFOLLOW)
-        file_uid = os.fstat(fd).st_uid
-        os.close(fd)
-    else:  # AIX and Jython
-        # WARNING: time of check vulnerability, but best we can do w/o NOFOLLOW
-        if not os.path.islink(path):
-            # older versions of Jython don't have `os.fstat`
-            file_uid = os.stat(path).st_uid
-        else:
-            # raise OSError for parity with os.O_NOFOLLOW above
-            raise OSError(
-                "%s is a symlink; Will not return uid for symlinks" % path
-            )
-    return file_uid
-
-
-if sys.version_info >= (3, 4):
-    from importlib.machinery import EXTENSION_SUFFIXES
-
-    def get_extension_suffixes():
-        return EXTENSION_SUFFIXES
-else:
-    from imp import get_suffixes
-
-    def get_extension_suffixes():
-        return [suffix[0] for suffix in get_suffixes()]
-
-
-def expanduser(path):
-    # type: (str) -> str
-    """
-    Expand ~ and ~user constructions.
-
-    Includes a workaround for https://bugs.python.org/issue14768
-    """
-    expanded = os.path.expanduser(path)
-    if path.startswith('~/') and expanded.startswith('//'):
-        expanded = expanded[1:]
-    return expanded
-
-
-# packages in the stdlib that may have installation metadata, but should not be
-# considered 'installed'.  this theoretically could be determined based on
-# dist.location (py27:`sysconfig.get_paths()['stdlib']`,
-# py26:sysconfig.get_config_vars('LIBDEST')), but fear platform variation may
-# make this ineffective, so hard-coding
-stdlib_pkgs = {"python", "wsgiref", "argparse"}
-
-
-# windows detection, covers cpython and ironpython
-WINDOWS = (sys.platform.startswith("win") or
-           (sys.platform == 'cli' and os.name == 'nt'))
-
-
-def samefile(file1, file2):
-    # type: (str, str) -> bool
-    """Provide an alternative for os.path.samefile on Windows/Python2"""
-    if hasattr(os.path, 'samefile'):
-        return os.path.samefile(file1, file2)
-    else:
-        path1 = os.path.normcase(os.path.abspath(file1))
-        path2 = os.path.normcase(os.path.abspath(file2))
-        return path1 == path2
-
-
-if hasattr(shutil, 'get_terminal_size'):
-    def get_terminal_size():
-        # type: () -> Tuple[int, int]
-        """
-        Returns a tuple (x, y) representing the width(x) and the height(y)
-        in characters of the terminal window.
-        """
-        return tuple(shutil.get_terminal_size())  # type: ignore
-else:
-    def get_terminal_size():
-        # type: () -> Tuple[int, int]
-        """
-        Returns a tuple (x, y) representing the width(x) and the height(y)
-        in characters of the terminal window.
-        """
-        def ioctl_GWINSZ(fd):
-            try:
-                import fcntl
-                import termios
-                import struct
-                cr = struct.unpack_from(
-                    'hh',
-                    fcntl.ioctl(fd, termios.TIOCGWINSZ, '12345678')
-                )
-            except Exception:
-                return None
-            if cr == (0, 0):
-                return None
-            return cr
-        cr = ioctl_GWINSZ(0) or ioctl_GWINSZ(1) or ioctl_GWINSZ(2)
-        if not cr:
-            try:
-                fd = os.open(os.ctermid(), os.O_RDONLY)
-                cr = ioctl_GWINSZ(fd)
-                os.close(fd)
-            except Exception:
-                pass
-        if not cr:
-            cr = (os.environ.get('LINES', 25), os.environ.get('COLUMNS', 80))
-        return int(cr[1]), int(cr[0])
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/deprecation.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/deprecation.py
deleted file mode 100644
index 0beaf74..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/deprecation.py
+++ /dev/null
@@ -1,90 +0,0 @@
-"""
-A module that implements tooling to enable easy warnings about deprecations.
-"""
-from __future__ import absolute_import
-
-import logging
-import warnings
-
-from pip._vendor.packaging.version import parse
-
-from pip import __version__ as current_version
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if MYPY_CHECK_RUNNING:
-    from typing import Any, Optional  # noqa: F401
-
-
-class PipDeprecationWarning(Warning):
-    pass
-
-
-_original_showwarning = None  # type: Any
-
-
-# Warnings <-> Logging Integration
-def _showwarning(message, category, filename, lineno, file=None, line=None):
-    if file is not None:
-        if _original_showwarning is not None:
-            _original_showwarning(
-                message, category, filename, lineno, file, line,
-            )
-    elif issubclass(category, PipDeprecationWarning):
-        # We use a specially named logger which will handle all of the
-        # deprecation messages for pip.
-        logger = logging.getLogger("pip._internal.deprecations")
-        logger.warning(message)
-    else:
-        _original_showwarning(
-            message, category, filename, lineno, file, line,
-        )
-
-
-def install_warning_logger():
-    # type: () -> None
-    # Enable our Deprecation Warnings
-    warnings.simplefilter("default", PipDeprecationWarning, append=True)
-
-    global _original_showwarning
-
-    if _original_showwarning is None:
-        _original_showwarning = warnings.showwarning
-        warnings.showwarning = _showwarning
-
-
-def deprecated(reason, replacement, gone_in, issue=None):
-    # type: (str, Optional[str], Optional[str], Optional[int]) -> None
-    """Helper to deprecate existing functionality.
-
-    reason:
-        Textual reason shown to the user about why this functionality has
-        been deprecated.
-    replacement:
-        Textual suggestion shown to the user about what alternative
-        functionality they can use.
-    gone_in:
-        The version of pip does this functionality should get removed in.
-        Raises errors if pip's current version is greater than or equal to
-        this.
-    issue:
-        Issue number on the tracker that would serve as a useful place for
-        users to find related discussion and provide feedback.
-
-    Always pass replacement, gone_in and issue as keyword arguments for clarity
-    at the call site.
-    """
-
-    # Construct a nice message.
-    # This is purposely eagerly formatted as we want it to appear as if someone
-    # typed this entire message out.
-    message = "DEPRECATION: " + reason
-    if replacement is not None:
-        message += " A possible replacement is {}.".format(replacement)
-    if issue is not None:
-        url = "https://github.com/pypa/pip/issues/" + str(issue)
-        message += " You can find discussion regarding this at {}.".format(url)
-
-    # Raise as an error if it has to be removed.
-    if gone_in is not None and parse(current_version) >= parse(gone_in):
-        raise PipDeprecationWarning(message)
-    warnings.warn(message, category=PipDeprecationWarning, stacklevel=2)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/encoding.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/encoding.py
deleted file mode 100644
index d36defa..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/encoding.py
+++ /dev/null
@@ -1,39 +0,0 @@
-import codecs
-import locale
-import re
-import sys
-
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if MYPY_CHECK_RUNNING:
-    from typing import List, Tuple, Text  # noqa: F401
-
-BOMS = [
-    (codecs.BOM_UTF8, 'utf8'),
-    (codecs.BOM_UTF16, 'utf16'),
-    (codecs.BOM_UTF16_BE, 'utf16-be'),
-    (codecs.BOM_UTF16_LE, 'utf16-le'),
-    (codecs.BOM_UTF32, 'utf32'),
-    (codecs.BOM_UTF32_BE, 'utf32-be'),
-    (codecs.BOM_UTF32_LE, 'utf32-le'),
-]  # type: List[Tuple[bytes, Text]]
-
-ENCODING_RE = re.compile(br'coding[:=]\s*([-\w.]+)')
-
-
-def auto_decode(data):
-    # type: (bytes) -> Text
-    """Check a bytes string for a BOM to correctly detect the encoding
-
-    Fallback to locale.getpreferredencoding(False) like open() on Python3"""
-    for bom, encoding in BOMS:
-        if data.startswith(bom):
-            return data[len(bom):].decode(encoding)
-    # Lets check the first two lines as in PEP263
-    for line in data.split(b'\n')[:2]:
-        if line[0:1] == b'#' and ENCODING_RE.search(line):
-            encoding = ENCODING_RE.search(line).groups()[0].decode('ascii')
-            return data.decode(encoding)
-    return data.decode(
-        locale.getpreferredencoding(False) or sys.getdefaultencoding(),
-    )
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/filesystem.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/filesystem.py
deleted file mode 100644
index 1e6b033..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/filesystem.py
+++ /dev/null
@@ -1,30 +0,0 @@
-import os
-import os.path
-
-from pip._internal.utils.compat import get_path_uid
-
-
-def check_path_owner(path):
-    # type: (str) -> bool
-    # If we don't have a way to check the effective uid of this process, then
-    # we'll just assume that we own the directory.
-    if not hasattr(os, "geteuid"):
-        return True
-
-    previous = None
-    while path != previous:
-        if os.path.lexists(path):
-            # Check if path is writable by current user.
-            if os.geteuid() == 0:
-                # Special handling for root user in order to handle properly
-                # cases where users use sudo without -H flag.
-                try:
-                    path_uid = get_path_uid(path)
-                except OSError:
-                    return False
-                return path_uid == 0
-            else:
-                return os.access(path, os.W_OK)
-        else:
-            previous, path = path, os.path.dirname(path)
-    return False  # assume we don't own the path
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/glibc.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/glibc.py
deleted file mode 100644
index 8a51f69..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/glibc.py
+++ /dev/null
@@ -1,93 +0,0 @@
-from __future__ import absolute_import
-
-import ctypes
-import re
-import warnings
-
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if MYPY_CHECK_RUNNING:
-    from typing import Optional, Tuple  # noqa: F401
-
-
-def glibc_version_string():
-    # type: () -> Optional[str]
-    "Returns glibc version string, or None if not using glibc."
-
-    # ctypes.CDLL(None) internally calls dlopen(NULL), and as the dlopen
-    # manpage says, "If filename is NULL, then the returned handle is for the
-    # main program". This way we can let the linker do the work to figure out
-    # which libc our process is actually using.
-    process_namespace = ctypes.CDLL(None)
-    try:
-        gnu_get_libc_version = process_namespace.gnu_get_libc_version
-    except AttributeError:
-        # Symbol doesn't exist -> therefore, we are not linked to
-        # glibc.
-        return None
-
-    # Call gnu_get_libc_version, which returns a string like "2.5"
-    gnu_get_libc_version.restype = ctypes.c_char_p
-    version_str = gnu_get_libc_version()
-    # py2 / py3 compatibility:
-    if not isinstance(version_str, str):
-        version_str = version_str.decode("ascii")
-
-    return version_str
-
-
-# Separated out from have_compatible_glibc for easier unit testing
-def check_glibc_version(version_str, required_major, minimum_minor):
-    # type: (str, int, int) -> bool
-    # Parse string and check against requested version.
-    #
-    # We use a regexp instead of str.split because we want to discard any
-    # random junk that might come after the minor version -- this might happen
-    # in patched/forked versions of glibc (e.g. Linaro's version of glibc
-    # uses version strings like "2.20-2014.11"). See gh-3588.
-    m = re.match(r"(?P<major>[0-9]+)\.(?P<minor>[0-9]+)", version_str)
-    if not m:
-        warnings.warn("Expected glibc version with 2 components major.minor,"
-                      " got: %s" % version_str, RuntimeWarning)
-        return False
-    return (int(m.group("major")) == required_major and
-            int(m.group("minor")) >= minimum_minor)
-
-
-def have_compatible_glibc(required_major, minimum_minor):
-    # type: (int, int) -> bool
-    version_str = glibc_version_string()  # type: Optional[str]
-    if version_str is None:
-        return False
-    return check_glibc_version(version_str, required_major, minimum_minor)
-
-
-# platform.libc_ver regularly returns completely nonsensical glibc
-# versions. E.g. on my computer, platform says:
-#
-#   ~$ python2.7 -c 'import platform; print(platform.libc_ver())'
-#   ('glibc', '2.7')
-#   ~$ python3.5 -c 'import platform; print(platform.libc_ver())'
-#   ('glibc', '2.9')
-#
-# But the truth is:
-#
-#   ~$ ldd --version
-#   ldd (Debian GLIBC 2.22-11) 2.22
-#
-# This is unfortunate, because it means that the linehaul data on libc
-# versions that was generated by pip 8.1.2 and earlier is useless and
-# misleading. Solution: instead of using platform, use our code that actually
-# works.
-def libc_ver():
-    # type: () -> Tuple[str, str]
-    """Try to determine the glibc version
-
-    Returns a tuple of strings (lib, version) which default to empty strings
-    in case the lookup fails.
-    """
-    glibc_version = glibc_version_string()
-    if glibc_version is None:
-        return ("", "")
-    else:
-        return ("glibc", glibc_version)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/hashes.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/hashes.py
deleted file mode 100644
index c6df7a1..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/hashes.py
+++ /dev/null
@@ -1,115 +0,0 @@
-from __future__ import absolute_import
-
-import hashlib
-
-from pip._vendor.six import iteritems, iterkeys, itervalues
-
-from pip._internal.exceptions import (
-    HashMismatch, HashMissing, InstallationError,
-)
-from pip._internal.utils.misc import read_chunks
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if MYPY_CHECK_RUNNING:
-    from typing import (  # noqa: F401
-        Dict, List, BinaryIO, NoReturn, Iterator
-    )
-    from pip._vendor.six import PY3
-    if PY3:
-        from hashlib import _Hash  # noqa: F401
-    else:
-        from hashlib import _hash as _Hash  # noqa: F401
-
-
-# The recommended hash algo of the moment. Change this whenever the state of
-# the art changes; it won't hurt backward compatibility.
-FAVORITE_HASH = 'sha256'
-
-
-# Names of hashlib algorithms allowed by the --hash option and ``pip hash``
-# Currently, those are the ones at least as collision-resistant as sha256.
-STRONG_HASHES = ['sha256', 'sha384', 'sha512']
-
-
-class Hashes(object):
-    """A wrapper that builds multiple hashes at once and checks them against
-    known-good values
-
-    """
-    def __init__(self, hashes=None):
-        # type: (Dict[str, List[str]]) -> None
-        """
-        :param hashes: A dict of algorithm names pointing to lists of allowed
-            hex digests
-        """
-        self._allowed = {} if hashes is None else hashes
-
-    def check_against_chunks(self, chunks):
-        # type: (Iterator[bytes]) -> None
-        """Check good hashes against ones built from iterable of chunks of
-        data.
-
-        Raise HashMismatch if none match.
-
-        """
-        gots = {}
-        for hash_name in iterkeys(self._allowed):
-            try:
-                gots[hash_name] = hashlib.new(hash_name)
-            except (ValueError, TypeError):
-                raise InstallationError('Unknown hash name: %s' % hash_name)
-
-        for chunk in chunks:
-            for hash in itervalues(gots):
-                hash.update(chunk)
-
-        for hash_name, got in iteritems(gots):
-            if got.hexdigest() in self._allowed[hash_name]:
-                return
-        self._raise(gots)
-
-    def _raise(self, gots):
-        # type: (Dict[str, _Hash]) -> NoReturn
-        raise HashMismatch(self._allowed, gots)
-
-    def check_against_file(self, file):
-        # type: (BinaryIO) -> None
-        """Check good hashes against a file-like object
-
-        Raise HashMismatch if none match.
-
-        """
-        return self.check_against_chunks(read_chunks(file))
-
-    def check_against_path(self, path):
-        # type: (str) -> None
-        with open(path, 'rb') as file:
-            return self.check_against_file(file)
-
-    def __nonzero__(self):
-        # type: () -> bool
-        """Return whether I know any known-good hashes."""
-        return bool(self._allowed)
-
-    def __bool__(self):
-        # type: () -> bool
-        return self.__nonzero__()
-
-
-class MissingHashes(Hashes):
-    """A workalike for Hashes used when we're missing a hash for a requirement
-
-    It computes the actual hash of the requirement and raises a HashMissing
-    exception showing it to the user.
-
-    """
-    def __init__(self):
-        # type: () -> None
-        """Don't offer the ``hashes`` kwarg."""
-        # Pass our favorite hash in to generate a "gotten hash". With the
-        # empty list, it will never match, so an error will always raise.
-        super(MissingHashes, self).__init__(hashes={FAVORITE_HASH: []})
-
-    def _raise(self, gots):
-        # type: (Dict[str, _Hash]) -> NoReturn
-        raise HashMissing(gots[FAVORITE_HASH].hexdigest())
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/logging.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/logging.py
deleted file mode 100644
index 579d696..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/logging.py
+++ /dev/null
@@ -1,318 +0,0 @@
-from __future__ import absolute_import
-
-import contextlib
-import errno
-import logging
-import logging.handlers
-import os
-import sys
-
-from pip._vendor.six import PY2
-
-from pip._internal.utils.compat import WINDOWS
-from pip._internal.utils.misc import ensure_dir
-
-try:
-    import threading
-except ImportError:
-    import dummy_threading as threading  # type: ignore
-
-
-try:
-    from pip._vendor import colorama
-# Lots of different errors can come from this, including SystemError and
-# ImportError.
-except Exception:
-    colorama = None
-
-
-_log_state = threading.local()
-_log_state.indentation = 0
-
-
-class BrokenStdoutLoggingError(Exception):
-    """
-    Raised if BrokenPipeError occurs for the stdout stream while logging.
-    """
-    pass
-
-
-# BrokenPipeError does not exist in Python 2 and, in addition, manifests
-# differently in Windows and non-Windows.
-if WINDOWS:
-    # In Windows, a broken pipe can show up as EINVAL rather than EPIPE:
-    # https://bugs.python.org/issue19612
-    # https://bugs.python.org/issue30418
-    if PY2:
-        def _is_broken_pipe_error(exc_class, exc):
-            """See the docstring for non-Windows Python 3 below."""
-            return (exc_class is IOError and
-                    exc.errno in (errno.EINVAL, errno.EPIPE))
-    else:
-        # In Windows, a broken pipe IOError became OSError in Python 3.
-        def _is_broken_pipe_error(exc_class, exc):
-            """See the docstring for non-Windows Python 3 below."""
-            return ((exc_class is BrokenPipeError) or  # noqa: F821
-                    (exc_class is OSError and
-                     exc.errno in (errno.EINVAL, errno.EPIPE)))
-elif PY2:
-    def _is_broken_pipe_error(exc_class, exc):
-        """See the docstring for non-Windows Python 3 below."""
-        return (exc_class is IOError and exc.errno == errno.EPIPE)
-else:
-    # Then we are in the non-Windows Python 3 case.
-    def _is_broken_pipe_error(exc_class, exc):
-        """
-        Return whether an exception is a broken pipe error.
-
-        Args:
-          exc_class: an exception class.
-          exc: an exception instance.
-        """
-        return (exc_class is BrokenPipeError)  # noqa: F821
-
-
-@contextlib.contextmanager
-def indent_log(num=2):
-    """
-    A context manager which will cause the log output to be indented for any
-    log messages emitted inside it.
-    """
-    _log_state.indentation += num
-    try:
-        yield
-    finally:
-        _log_state.indentation -= num
-
-
-def get_indentation():
-    return getattr(_log_state, 'indentation', 0)
-
-
-class IndentingFormatter(logging.Formatter):
-    def __init__(self, *args, **kwargs):
-        """
-        A logging.Formatter obeying containing indent_log contexts.
-
-        :param add_timestamp: A bool indicating output lines should be prefixed
-            with their record's timestamp.
-        """
-        self.add_timestamp = kwargs.pop("add_timestamp", False)
-        super(IndentingFormatter, self).__init__(*args, **kwargs)
-
-    def format(self, record):
-        """
-        Calls the standard formatter, but will indent all of the log messages
-        by our current indentation level.
-        """
-        formatted = super(IndentingFormatter, self).format(record)
-        prefix = ''
-        if self.add_timestamp:
-            prefix = self.formatTime(record, "%Y-%m-%dT%H:%M:%S ")
-        prefix += " " * get_indentation()
-        formatted = "".join([
-            prefix + line
-            for line in formatted.splitlines(True)
-        ])
-        return formatted
-
-
-def _color_wrap(*colors):
-    def wrapped(inp):
-        return "".join(list(colors) + [inp, colorama.Style.RESET_ALL])
-    return wrapped
-
-
-class ColorizedStreamHandler(logging.StreamHandler):
-
-    # Don't build up a list of colors if we don't have colorama
-    if colorama:
-        COLORS = [
-            # This needs to be in order from highest logging level to lowest.
-            (logging.ERROR, _color_wrap(colorama.Fore.RED)),
-            (logging.WARNING, _color_wrap(colorama.Fore.YELLOW)),
-        ]
-    else:
-        COLORS = []
-
-    def __init__(self, stream=None, no_color=None):
-        logging.StreamHandler.__init__(self, stream)
-        self._no_color = no_color
-
-        if WINDOWS and colorama:
-            self.stream = colorama.AnsiToWin32(self.stream)
-
-    def _using_stdout(self):
-        """
-        Return whether the handler is using sys.stdout.
-        """
-        if WINDOWS and colorama:
-            # Then self.stream is an AnsiToWin32 object.
-            return self.stream.wrapped is sys.stdout
-
-        return self.stream is sys.stdout
-
-    def should_color(self):
-        # Don't colorize things if we do not have colorama or if told not to
-        if not colorama or self._no_color:
-            return False
-
-        real_stream = (
-            self.stream if not isinstance(self.stream, colorama.AnsiToWin32)
-            else self.stream.wrapped
-        )
-
-        # If the stream is a tty we should color it
-        if hasattr(real_stream, "isatty") and real_stream.isatty():
-            return True
-
-        # If we have an ANSI term we should color it
-        if os.environ.get("TERM") == "ANSI":
-            return True
-
-        # If anything else we should not color it
-        return False
-
-    def format(self, record):
-        msg = logging.StreamHandler.format(self, record)
-
-        if self.should_color():
-            for level, color in self.COLORS:
-                if record.levelno >= level:
-                    msg = color(msg)
-                    break
-
-        return msg
-
-    # The logging module says handleError() can be customized.
-    def handleError(self, record):
-        exc_class, exc = sys.exc_info()[:2]
-        # If a broken pipe occurred while calling write() or flush() on the
-        # stdout stream in logging's Handler.emit(), then raise our special
-        # exception so we can handle it in main() instead of logging the
-        # broken pipe error and continuing.
-        if (exc_class and self._using_stdout() and
-                _is_broken_pipe_error(exc_class, exc)):
-            raise BrokenStdoutLoggingError()
-
-        return super(ColorizedStreamHandler, self).handleError(record)
-
-
-class BetterRotatingFileHandler(logging.handlers.RotatingFileHandler):
-
-    def _open(self):
-        ensure_dir(os.path.dirname(self.baseFilename))
-        return logging.handlers.RotatingFileHandler._open(self)
-
-
-class MaxLevelFilter(logging.Filter):
-
-    def __init__(self, level):
-        self.level = level
-
-    def filter(self, record):
-        return record.levelno < self.level
-
-
-def setup_logging(verbosity, no_color, user_log_file):
-    """Configures and sets up all of the logging
-
-    Returns the requested logging level, as its integer value.
-    """
-
-    # Determine the level to be logging at.
-    if verbosity >= 1:
-        level = "DEBUG"
-    elif verbosity == -1:
-        level = "WARNING"
-    elif verbosity == -2:
-        level = "ERROR"
-    elif verbosity <= -3:
-        level = "CRITICAL"
-    else:
-        level = "INFO"
-
-    level_number = getattr(logging, level)
-
-    # The "root" logger should match the "console" level *unless* we also need
-    # to log to a user log file.
-    include_user_log = user_log_file is not None
-    if include_user_log:
-        additional_log_file = user_log_file
-        root_level = "DEBUG"
-    else:
-        additional_log_file = "/dev/null"
-        root_level = level
-
-    # Disable any logging besides WARNING unless we have DEBUG level logging
-    # enabled for vendored libraries.
-    vendored_log_level = "WARNING" if level in ["INFO", "ERROR"] else "DEBUG"
-
-    # Shorthands for clarity
-    log_streams = {
-        "stdout": "ext://sys.stdout",
-        "stderr": "ext://sys.stderr",
-    }
-    handler_classes = {
-        "stream": "pip._internal.utils.logging.ColorizedStreamHandler",
-        "file": "pip._internal.utils.logging.BetterRotatingFileHandler",
-    }
-
-    logging.config.dictConfig({
-        "version": 1,
-        "disable_existing_loggers": False,
-        "filters": {
-            "exclude_warnings": {
-                "()": "pip._internal.utils.logging.MaxLevelFilter",
-                "level": logging.WARNING,
-            },
-        },
-        "formatters": {
-            "indent": {
-                "()": IndentingFormatter,
-                "format": "%(message)s",
-            },
-            "indent_with_timestamp": {
-                "()": IndentingFormatter,
-                "format": "%(message)s",
-                "add_timestamp": True,
-            },
-        },
-        "handlers": {
-            "console": {
-                "level": level,
-                "class": handler_classes["stream"],
-                "no_color": no_color,
-                "stream": log_streams["stdout"],
-                "filters": ["exclude_warnings"],
-                "formatter": "indent",
-            },
-            "console_errors": {
-                "level": "WARNING",
-                "class": handler_classes["stream"],
-                "no_color": no_color,
-                "stream": log_streams["stderr"],
-                "formatter": "indent",
-            },
-            "user_log": {
-                "level": "DEBUG",
-                "class": handler_classes["file"],
-                "filename": additional_log_file,
-                "delay": True,
-                "formatter": "indent_with_timestamp",
-            },
-        },
-        "root": {
-            "level": root_level,
-            "handlers": ["console", "console_errors"] + (
-                ["user_log"] if include_user_log else []
-            ),
-        },
-        "loggers": {
-            "pip._vendor": {
-                "level": vendored_log_level
-            }
-        },
-    })
-
-    return level_number
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/misc.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/misc.py
deleted file mode 100644
index 84605ee..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/misc.py
+++ /dev/null
@@ -1,1040 +0,0 @@
-from __future__ import absolute_import
-
-import contextlib
-import errno
-import io
-import locale
-# we have a submodule named 'logging' which would shadow this if we used the
-# regular name:
-import logging as std_logging
-import os
-import posixpath
-import re
-import shutil
-import stat
-import subprocess
-import sys
-import tarfile
-import zipfile
-from collections import deque
-
-from pip._vendor import pkg_resources
-# NOTE: retrying is not annotated in typeshed as on 2017-07-17, which is
-#       why we ignore the type on this import.
-from pip._vendor.retrying import retry  # type: ignore
-from pip._vendor.six import PY2
-from pip._vendor.six.moves import input
-from pip._vendor.six.moves.urllib import parse as urllib_parse
-from pip._vendor.six.moves.urllib.parse import unquote as urllib_unquote
-
-from pip._internal.exceptions import CommandError, InstallationError
-from pip._internal.locations import (
-    running_under_virtualenv, site_packages, user_site, virtualenv_no_global,
-    write_delete_marker_file,
-)
-from pip._internal.utils.compat import (
-    WINDOWS, console_to_str, expanduser, stdlib_pkgs,
-)
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if PY2:
-    from io import BytesIO as StringIO
-else:
-    from io import StringIO
-
-if MYPY_CHECK_RUNNING:
-    from typing import (  # noqa: F401
-        Optional, Tuple, Iterable, List, Match, Union, Any, Mapping, Text,
-        AnyStr, Container
-    )
-    from pip._vendor.pkg_resources import Distribution  # noqa: F401
-    from pip._internal.models.link import Link  # noqa: F401
-    from pip._internal.utils.ui import SpinnerInterface  # noqa: F401
-
-
-__all__ = ['rmtree', 'display_path', 'backup_dir',
-           'ask', 'splitext',
-           'format_size', 'is_installable_dir',
-           'is_svn_page', 'file_contents',
-           'split_leading_dir', 'has_leading_dir',
-           'normalize_path',
-           'renames', 'get_prog',
-           'unzip_file', 'untar_file', 'unpack_file', 'call_subprocess',
-           'captured_stdout', 'ensure_dir',
-           'ARCHIVE_EXTENSIONS', 'SUPPORTED_EXTENSIONS', 'WHEEL_EXTENSION',
-           'get_installed_version', 'remove_auth_from_url']
-
-
-logger = std_logging.getLogger(__name__)
-
-WHEEL_EXTENSION = '.whl'
-BZ2_EXTENSIONS = ('.tar.bz2', '.tbz')
-XZ_EXTENSIONS = ('.tar.xz', '.txz', '.tlz', '.tar.lz', '.tar.lzma')
-ZIP_EXTENSIONS = ('.zip', WHEEL_EXTENSION)
-TAR_EXTENSIONS = ('.tar.gz', '.tgz', '.tar')
-ARCHIVE_EXTENSIONS = (
-    ZIP_EXTENSIONS + BZ2_EXTENSIONS + TAR_EXTENSIONS + XZ_EXTENSIONS)
-SUPPORTED_EXTENSIONS = ZIP_EXTENSIONS + TAR_EXTENSIONS
-
-try:
-    import bz2  # noqa
-    SUPPORTED_EXTENSIONS += BZ2_EXTENSIONS
-except ImportError:
-    logger.debug('bz2 module is not available')
-
-try:
-    # Only for Python 3.3+
-    import lzma  # noqa
-    SUPPORTED_EXTENSIONS += XZ_EXTENSIONS
-except ImportError:
-    logger.debug('lzma module is not available')
-
-
-def ensure_dir(path):
-    # type: (AnyStr) -> None
-    """os.path.makedirs without EEXIST."""
-    try:
-        os.makedirs(path)
-    except OSError as e:
-        if e.errno != errno.EEXIST:
-            raise
-
-
-def get_prog():
-    # type: () -> str
-    try:
-        prog = os.path.basename(sys.argv[0])
-        if prog in ('__main__.py', '-c'):
-            return "%s -m pip" % sys.executable
-        else:
-            return prog
-    except (AttributeError, TypeError, IndexError):
-        pass
-    return 'pip'
-
-
-# Retry every half second for up to 3 seconds
-@retry(stop_max_delay=3000, wait_fixed=500)
-def rmtree(dir, ignore_errors=False):
-    # type: (str, bool) -> None
-    shutil.rmtree(dir, ignore_errors=ignore_errors,
-                  onerror=rmtree_errorhandler)
-
-
-def rmtree_errorhandler(func, path, exc_info):
-    """On Windows, the files in .svn are read-only, so when rmtree() tries to
-    remove them, an exception is thrown.  We catch that here, remove the
-    read-only attribute, and hopefully continue without problems."""
-    # if file type currently read only
-    if os.stat(path).st_mode & stat.S_IREAD:
-        # convert to read/write
-        os.chmod(path, stat.S_IWRITE)
-        # use the original function to repeat the operation
-        func(path)
-        return
-    else:
-        raise
-
-
-def display_path(path):
-    # type: (Union[str, Text]) -> str
-    """Gives the display value for a given path, making it relative to cwd
-    if possible."""
-    path = os.path.normcase(os.path.abspath(path))
-    if sys.version_info[0] == 2:
-        path = path.decode(sys.getfilesystemencoding(), 'replace')
-        path = path.encode(sys.getdefaultencoding(), 'replace')
-    if path.startswith(os.getcwd() + os.path.sep):
-        path = '.' + path[len(os.getcwd()):]
-    return path
-
-
-def backup_dir(dir, ext='.bak'):
-    # type: (str, str) -> str
-    """Figure out the name of a directory to back up the given dir to
-    (adding .bak, .bak2, etc)"""
-    n = 1
-    extension = ext
-    while os.path.exists(dir + extension):
-        n += 1
-        extension = ext + str(n)
-    return dir + extension
-
-
-def ask_path_exists(message, options):
-    # type: (str, Iterable[str]) -> str
-    for action in os.environ.get('PIP_EXISTS_ACTION', '').split():
-        if action in options:
-            return action
-    return ask(message, options)
-
-
-def ask(message, options):
-    # type: (str, Iterable[str]) -> str
-    """Ask the message interactively, with the given possible responses"""
-    while 1:
-        if os.environ.get('PIP_NO_INPUT'):
-            raise Exception(
-                'No input was expected ($PIP_NO_INPUT set); question: %s' %
-                message
-            )
-        response = input(message)
-        response = response.strip().lower()
-        if response not in options:
-            print(
-                'Your response (%r) was not one of the expected responses: '
-                '%s' % (response, ', '.join(options))
-            )
-        else:
-            return response
-
-
-def format_size(bytes):
-    # type: (float) -> str
-    if bytes > 1000 * 1000:
-        return '%.1fMB' % (bytes / 1000.0 / 1000)
-    elif bytes > 10 * 1000:
-        return '%ikB' % (bytes / 1000)
-    elif bytes > 1000:
-        return '%.1fkB' % (bytes / 1000.0)
-    else:
-        return '%ibytes' % bytes
-
-
-def is_installable_dir(path):
-    # type: (str) -> bool
-    """Is path is a directory containing setup.py or pyproject.toml?
-    """
-    if not os.path.isdir(path):
-        return False
-    setup_py = os.path.join(path, 'setup.py')
-    if os.path.isfile(setup_py):
-        return True
-    pyproject_toml = os.path.join(path, 'pyproject.toml')
-    if os.path.isfile(pyproject_toml):
-        return True
-    return False
-
-
-def is_svn_page(html):
-    # type: (Union[str, Text]) -> Optional[Match[Union[str, Text]]]
-    """
-    Returns true if the page appears to be the index page of an svn repository
-    """
-    return (re.search(r'<title>[^<]*Revision \d+:', html) and
-            re.search(r'Powered by (?:<a[^>]*?>)?Subversion', html, re.I))
-
-
-def file_contents(filename):
-    # type: (str) -> Text
-    with open(filename, 'rb') as fp:
-        return fp.read().decode('utf-8')
-
-
-def read_chunks(file, size=io.DEFAULT_BUFFER_SIZE):
-    """Yield pieces of data from a file-like object until EOF."""
-    while True:
-        chunk = file.read(size)
-        if not chunk:
-            break
-        yield chunk
-
-
-def split_leading_dir(path):
-    # type: (Union[str, Text]) -> List[Union[str, Text]]
-    path = path.lstrip('/').lstrip('\\')
-    if '/' in path and (('\\' in path and path.find('/') < path.find('\\')) or
-                        '\\' not in path):
-        return path.split('/', 1)
-    elif '\\' in path:
-        return path.split('\\', 1)
-    else:
-        return [path, '']
-
-
-def has_leading_dir(paths):
-    # type: (Iterable[Union[str, Text]]) -> bool
-    """Returns true if all the paths have the same leading path name
-    (i.e., everything is in one subdirectory in an archive)"""
-    common_prefix = None
-    for path in paths:
-        prefix, rest = split_leading_dir(path)
-        if not prefix:
-            return False
-        elif common_prefix is None:
-            common_prefix = prefix
-        elif prefix != common_prefix:
-            return False
-    return True
-
-
-def normalize_path(path, resolve_symlinks=True):
-    # type: (str, bool) -> str
-    """
-    Convert a path to its canonical, case-normalized, absolute version.
-
-    """
-    path = expanduser(path)
-    if resolve_symlinks:
-        path = os.path.realpath(path)
-    else:
-        path = os.path.abspath(path)
-    return os.path.normcase(path)
-
-
-def splitext(path):
-    # type: (str) -> Tuple[str, str]
-    """Like os.path.splitext, but take off .tar too"""
-    base, ext = posixpath.splitext(path)
-    if base.lower().endswith('.tar'):
-        ext = base[-4:] + ext
-        base = base[:-4]
-    return base, ext
-
-
-def renames(old, new):
-    # type: (str, str) -> None
-    """Like os.renames(), but handles renaming across devices."""
-    # Implementation borrowed from os.renames().
-    head, tail = os.path.split(new)
-    if head and tail and not os.path.exists(head):
-        os.makedirs(head)
-
-    shutil.move(old, new)
-
-    head, tail = os.path.split(old)
-    if head and tail:
-        try:
-            os.removedirs(head)
-        except OSError:
-            pass
-
-
-def is_local(path):
-    # type: (str) -> bool
-    """
-    Return True if path is within sys.prefix, if we're running in a virtualenv.
-
-    If we're not in a virtualenv, all paths are considered "local."
-
-    """
-    if not running_under_virtualenv():
-        return True
-    return normalize_path(path).startswith(normalize_path(sys.prefix))
-
-
-def dist_is_local(dist):
-    # type: (Distribution) -> bool
-    """
-    Return True if given Distribution object is installed locally
-    (i.e. within current virtualenv).
-
-    Always True if we're not in a virtualenv.
-
-    """
-    return is_local(dist_location(dist))
-
-
-def dist_in_usersite(dist):
-    # type: (Distribution) -> bool
-    """
-    Return True if given Distribution is installed in user site.
-    """
-    norm_path = normalize_path(dist_location(dist))
-    return norm_path.startswith(normalize_path(user_site))
-
-
-def dist_in_site_packages(dist):
-    # type: (Distribution) -> bool
-    """
-    Return True if given Distribution is installed in
-    sysconfig.get_python_lib().
-    """
-    return normalize_path(
-        dist_location(dist)
-    ).startswith(normalize_path(site_packages))
-
-
-def dist_is_editable(dist):
-    # type: (Distribution) -> bool
-    """
-    Return True if given Distribution is an editable install.
-    """
-    for path_item in sys.path:
-        egg_link = os.path.join(path_item, dist.project_name + '.egg-link')
-        if os.path.isfile(egg_link):
-            return True
-    return False
-
-
-def get_installed_distributions(local_only=True,
-                                skip=stdlib_pkgs,
-                                include_editables=True,
-                                editables_only=False,
-                                user_only=False):
-    # type: (bool, Container[str], bool, bool, bool) -> List[Distribution]
-    """
-    Return a list of installed Distribution objects.
-
-    If ``local_only`` is True (default), only return installations
-    local to the current virtualenv, if in a virtualenv.
-
-    ``skip`` argument is an iterable of lower-case project names to
-    ignore; defaults to stdlib_pkgs
-
-    If ``include_editables`` is False, don't report editables.
-
-    If ``editables_only`` is True , only report editables.
-
-    If ``user_only`` is True , only report installations in the user
-    site directory.
-
-    """
-    if local_only:
-        local_test = dist_is_local
-    else:
-        def local_test(d):
-            return True
-
-    if include_editables:
-        def editable_test(d):
-            return True
-    else:
-        def editable_test(d):
-            return not dist_is_editable(d)
-
-    if editables_only:
-        def editables_only_test(d):
-            return dist_is_editable(d)
-    else:
-        def editables_only_test(d):
-            return True
-
-    if user_only:
-        user_test = dist_in_usersite
-    else:
-        def user_test(d):
-            return True
-
-    # because of pkg_resources vendoring, mypy cannot find stub in typeshed
-    return [d for d in pkg_resources.working_set  # type: ignore
-            if local_test(d) and
-            d.key not in skip and
-            editable_test(d) and
-            editables_only_test(d) and
-            user_test(d)
-            ]
-
-
-def egg_link_path(dist):
-    # type: (Distribution) -> Optional[str]
-    """
-    Return the path for the .egg-link file if it exists, otherwise, None.
-
-    There's 3 scenarios:
-    1) not in a virtualenv
-       try to find in site.USER_SITE, then site_packages
-    2) in a no-global virtualenv
-       try to find in site_packages
-    3) in a yes-global virtualenv
-       try to find in site_packages, then site.USER_SITE
-       (don't look in global location)
-
-    For #1 and #3, there could be odd cases, where there's an egg-link in 2
-    locations.
-
-    This method will just return the first one found.
-    """
-    sites = []
-    if running_under_virtualenv():
-        if virtualenv_no_global():
-            sites.append(site_packages)
-        else:
-            sites.append(site_packages)
-            if user_site:
-                sites.append(user_site)
-    else:
-        if user_site:
-            sites.append(user_site)
-        sites.append(site_packages)
-
-    for site in sites:
-        egglink = os.path.join(site, dist.project_name) + '.egg-link'
-        if os.path.isfile(egglink):
-            return egglink
-    return None
-
-
-def dist_location(dist):
-    # type: (Distribution) -> str
-    """
-    Get the site-packages location of this distribution. Generally
-    this is dist.location, except in the case of develop-installed
-    packages, where dist.location is the source code location, and we
-    want to know where the egg-link file is.
-
-    """
-    egg_link = egg_link_path(dist)
-    if egg_link:
-        return egg_link
-    return dist.location
-
-
-def current_umask():
-    """Get the current umask which involves having to set it temporarily."""
-    mask = os.umask(0)
-    os.umask(mask)
-    return mask
-
-
-def unzip_file(filename, location, flatten=True):
-    # type: (str, str, bool) -> None
-    """
-    Unzip the file (with path `filename`) to the destination `location`.  All
-    files are written based on system defaults and umask (i.e. permissions are
-    not preserved), except that regular file members with any execute
-    permissions (user, group, or world) have "chmod +x" applied after being
-    written. Note that for windows, any execute changes using os.chmod are
-    no-ops per the python docs.
-    """
-    ensure_dir(location)
-    zipfp = open(filename, 'rb')
-    try:
-        zip = zipfile.ZipFile(zipfp, allowZip64=True)
-        leading = has_leading_dir(zip.namelist()) and flatten
-        for info in zip.infolist():
-            name = info.filename
-            fn = name
-            if leading:
-                fn = split_leading_dir(name)[1]
-            fn = os.path.join(location, fn)
-            dir = os.path.dirname(fn)
-            if fn.endswith('/') or fn.endswith('\\'):
-                # A directory
-                ensure_dir(fn)
-            else:
-                ensure_dir(dir)
-                # Don't use read() to avoid allocating an arbitrarily large
-                # chunk of memory for the file's content
-                fp = zip.open(name)
-                try:
-                    with open(fn, 'wb') as destfp:
-                        shutil.copyfileobj(fp, destfp)
-                finally:
-                    fp.close()
-                    mode = info.external_attr >> 16
-                    # if mode and regular file and any execute permissions for
-                    # user/group/world?
-                    if mode and stat.S_ISREG(mode) and mode & 0o111:
-                        # make dest file have execute for user/group/world
-                        # (chmod +x) no-op on windows per python docs
-                        os.chmod(fn, (0o777 - current_umask() | 0o111))
-    finally:
-        zipfp.close()
-
-
-def untar_file(filename, location):
-    # type: (str, str) -> None
-    """
-    Untar the file (with path `filename`) to the destination `location`.
-    All files are written based on system defaults and umask (i.e. permissions
-    are not preserved), except that regular file members with any execute
-    permissions (user, group, or world) have "chmod +x" applied after being
-    written.  Note that for windows, any execute changes using os.chmod are
-    no-ops per the python docs.
-    """
-    ensure_dir(location)
-    if filename.lower().endswith('.gz') or filename.lower().endswith('.tgz'):
-        mode = 'r:gz'
-    elif filename.lower().endswith(BZ2_EXTENSIONS):
-        mode = 'r:bz2'
-    elif filename.lower().endswith(XZ_EXTENSIONS):
-        mode = 'r:xz'
-    elif filename.lower().endswith('.tar'):
-        mode = 'r'
-    else:
-        logger.warning(
-            'Cannot determine compression type for file %s', filename,
-        )
-        mode = 'r:*'
-    tar = tarfile.open(filename, mode)
-    try:
-        leading = has_leading_dir([
-            member.name for member in tar.getmembers()
-        ])
-        for member in tar.getmembers():
-            fn = member.name
-            if leading:
-                # https://github.com/python/mypy/issues/1174
-                fn = split_leading_dir(fn)[1]  # type: ignore
-            path = os.path.join(location, fn)
-            if member.isdir():
-                ensure_dir(path)
-            elif member.issym():
-                try:
-                    # https://github.com/python/typeshed/issues/2673
-                    tar._extract_member(member, path)  # type: ignore
-                except Exception as exc:
-                    # Some corrupt tar files seem to produce this
-                    # (specifically bad symlinks)
-                    logger.warning(
-                        'In the tar file %s the member %s is invalid: %s',
-                        filename, member.name, exc,
-                    )
-                    continue
-            else:
-                try:
-                    fp = tar.extractfile(member)
-                except (KeyError, AttributeError) as exc:
-                    # Some corrupt tar files seem to produce this
-                    # (specifically bad symlinks)
-                    logger.warning(
-                        'In the tar file %s the member %s is invalid: %s',
-                        filename, member.name, exc,
-                    )
-                    continue
-                ensure_dir(os.path.dirname(path))
-                with open(path, 'wb') as destfp:
-                    shutil.copyfileobj(fp, destfp)
-                fp.close()
-                # Update the timestamp (useful for cython compiled files)
-                # https://github.com/python/typeshed/issues/2673
-                tar.utime(member, path)  # type: ignore
-                # member have any execute permissions for user/group/world?
-                if member.mode & 0o111:
-                    # make dest file have execute for user/group/world
-                    # no-op on windows per python docs
-                    os.chmod(path, (0o777 - current_umask() | 0o111))
-    finally:
-        tar.close()
-
-
-def unpack_file(
-    filename,  # type: str
-    location,  # type: str
-    content_type,  # type: Optional[str]
-    link  # type: Optional[Link]
-):
-    # type: (...) -> None
-    filename = os.path.realpath(filename)
-    if (content_type == 'application/zip' or
-            filename.lower().endswith(ZIP_EXTENSIONS) or
-            zipfile.is_zipfile(filename)):
-        unzip_file(
-            filename,
-            location,
-            flatten=not filename.endswith('.whl')
-        )
-    elif (content_type == 'application/x-gzip' or
-            tarfile.is_tarfile(filename) or
-            filename.lower().endswith(
-                TAR_EXTENSIONS + BZ2_EXTENSIONS + XZ_EXTENSIONS)):
-        untar_file(filename, location)
-    elif (content_type and content_type.startswith('text/html') and
-            is_svn_page(file_contents(filename))):
-        # We don't really care about this
-        from pip._internal.vcs.subversion import Subversion
-        Subversion('svn+' + link.url).unpack(location)
-    else:
-        # FIXME: handle?
-        # FIXME: magic signatures?
-        logger.critical(
-            'Cannot unpack file %s (downloaded from %s, content-type: %s); '
-            'cannot detect archive format',
-            filename, location, content_type,
-        )
-        raise InstallationError(
-            'Cannot determine archive format of %s' % location
-        )
-
-
-def call_subprocess(
-    cmd,  # type: List[str]
-    show_stdout=True,  # type: bool
-    cwd=None,  # type: Optional[str]
-    on_returncode='raise',  # type: str
-    extra_ok_returncodes=None,  # type: Optional[Iterable[int]]
-    command_desc=None,  # type: Optional[str]
-    extra_environ=None,  # type: Optional[Mapping[str, Any]]
-    unset_environ=None,  # type: Optional[Iterable[str]]
-    spinner=None  # type: Optional[SpinnerInterface]
-):
-    # type: (...) -> Optional[Text]
-    """
-    Args:
-      extra_ok_returncodes: an iterable of integer return codes that are
-        acceptable, in addition to 0. Defaults to None, which means [].
-      unset_environ: an iterable of environment variable names to unset
-        prior to calling subprocess.Popen().
-    """
-    if extra_ok_returncodes is None:
-        extra_ok_returncodes = []
-    if unset_environ is None:
-        unset_environ = []
-    # This function's handling of subprocess output is confusing and I
-    # previously broke it terribly, so as penance I will write a long comment
-    # explaining things.
-    #
-    # The obvious thing that affects output is the show_stdout=
-    # kwarg. show_stdout=True means, let the subprocess write directly to our
-    # stdout. Even though it is nominally the default, it is almost never used
-    # inside pip (and should not be used in new code without a very good
-    # reason); as of 2016-02-22 it is only used in a few places inside the VCS
-    # wrapper code. Ideally we should get rid of it entirely, because it
-    # creates a lot of complexity here for a rarely used feature.
-    #
-    # Most places in pip set show_stdout=False. What this means is:
-    # - We connect the child stdout to a pipe, which we read.
-    # - By default, we hide the output but show a spinner -- unless the
-    #   subprocess exits with an error, in which case we show the output.
-    # - If the --verbose option was passed (= loglevel is DEBUG), then we show
-    #   the output unconditionally. (But in this case we don't want to show
-    #   the output a second time if it turns out that there was an error.)
-    #
-    # stderr is always merged with stdout (even if show_stdout=True).
-    if show_stdout:
-        stdout = None
-    else:
-        stdout = subprocess.PIPE
-    if command_desc is None:
-        cmd_parts = []
-        for part in cmd:
-            if ' ' in part or '\n' in part or '"' in part or "'" in part:
-                part = '"%s"' % part.replace('"', '\\"')
-            cmd_parts.append(part)
-        command_desc = ' '.join(cmd_parts)
-    logger.debug("Running command %s", command_desc)
-    env = os.environ.copy()
-    if extra_environ:
-        env.update(extra_environ)
-    for name in unset_environ:
-        env.pop(name, None)
-    try:
-        proc = subprocess.Popen(
-            cmd, stderr=subprocess.STDOUT, stdin=subprocess.PIPE,
-            stdout=stdout, cwd=cwd, env=env,
-        )
-        proc.stdin.close()
-    except Exception as exc:
-        logger.critical(
-            "Error %s while executing command %s", exc, command_desc,
-        )
-        raise
-    all_output = []
-    if stdout is not None:
-        while True:
-            line = console_to_str(proc.stdout.readline())
-            if not line:
-                break
-            line = line.rstrip()
-            all_output.append(line + '\n')
-            if logger.getEffectiveLevel() <= std_logging.DEBUG:
-                # Show the line immediately
-                logger.debug(line)
-            else:
-                # Update the spinner
-                if spinner is not None:
-                    spinner.spin()
-    try:
-        proc.wait()
-    finally:
-        if proc.stdout:
-            proc.stdout.close()
-    if spinner is not None:
-        if proc.returncode:
-            spinner.finish("error")
-        else:
-            spinner.finish("done")
-    if proc.returncode and proc.returncode not in extra_ok_returncodes:
-        if on_returncode == 'raise':
-            if (logger.getEffectiveLevel() > std_logging.DEBUG and
-                    not show_stdout):
-                logger.info(
-                    'Complete output from command %s:', command_desc,
-                )
-                logger.info(
-                    ''.join(all_output) +
-                    '\n----------------------------------------'
-                )
-            raise InstallationError(
-                'Command "%s" failed with error code %s in %s'
-                % (command_desc, proc.returncode, cwd))
-        elif on_returncode == 'warn':
-            logger.warning(
-                'Command "%s" had error code %s in %s',
-                command_desc, proc.returncode, cwd,
-            )
-        elif on_returncode == 'ignore':
-            pass
-        else:
-            raise ValueError('Invalid value: on_returncode=%s' %
-                             repr(on_returncode))
-    if not show_stdout:
-        return ''.join(all_output)
-    return None
-
-
-def read_text_file(filename):
-    # type: (str) -> str
-    """Return the contents of *filename*.
-
-    Try to decode the file contents with utf-8, the preferred system encoding
-    (e.g., cp1252 on some Windows machines), and latin1, in that order.
-    Decoding a byte string with latin1 will never raise an error. In the worst
-    case, the returned string will contain some garbage characters.
-
-    """
-    with open(filename, 'rb') as fp:
-        data = fp.read()
-
-    encodings = ['utf-8', locale.getpreferredencoding(False), 'latin1']
-    for enc in encodings:
-        try:
-            # https://github.com/python/mypy/issues/1174
-            data = data.decode(enc)  # type: ignore
-        except UnicodeDecodeError:
-            continue
-        break
-
-    assert not isinstance(data, bytes)  # Latin1 should have worked.
-    return data
-
-
-def _make_build_dir(build_dir):
-    os.makedirs(build_dir)
-    write_delete_marker_file(build_dir)
-
-
-class FakeFile(object):
-    """Wrap a list of lines in an object with readline() to make
-    ConfigParser happy."""
-    def __init__(self, lines):
-        self._gen = (l for l in lines)
-
-    def readline(self):
-        try:
-            try:
-                return next(self._gen)
-            except NameError:
-                return self._gen.next()
-        except StopIteration:
-            return ''
-
-    def __iter__(self):
-        return self._gen
-
-
-class StreamWrapper(StringIO):
-
-    @classmethod
-    def from_stream(cls, orig_stream):
-        cls.orig_stream = orig_stream
-        return cls()
-
-    # compileall.compile_dir() needs stdout.encoding to print to stdout
-    @property
-    def encoding(self):
-        return self.orig_stream.encoding
-
-
-@contextlib.contextmanager
-def captured_output(stream_name):
-    """Return a context manager used by captured_stdout/stdin/stderr
-    that temporarily replaces the sys stream *stream_name* with a StringIO.
-
-    Taken from Lib/support/__init__.py in the CPython repo.
-    """
-    orig_stdout = getattr(sys, stream_name)
-    setattr(sys, stream_name, StreamWrapper.from_stream(orig_stdout))
-    try:
-        yield getattr(sys, stream_name)
-    finally:
-        setattr(sys, stream_name, orig_stdout)
-
-
-def captured_stdout():
-    """Capture the output of sys.stdout:
-
-       with captured_stdout() as stdout:
-           print('hello')
-       self.assertEqual(stdout.getvalue(), 'hello\n')
-
-    Taken from Lib/support/__init__.py in the CPython repo.
-    """
-    return captured_output('stdout')
-
-
-def captured_stderr():
-    """
-    See captured_stdout().
-    """
-    return captured_output('stderr')
-
-
-class cached_property(object):
-    """A property that is only computed once per instance and then replaces
-       itself with an ordinary attribute. Deleting the attribute resets the
-       property.
-
-       Source: https://github.com/bottlepy/bottle/blob/0.11.5/bottle.py#L175
-    """
-
-    def __init__(self, func):
-        self.__doc__ = getattr(func, '__doc__')
-        self.func = func
-
-    def __get__(self, obj, cls):
-        if obj is None:
-            # We're being accessed from the class itself, not from an object
-            return self
-        value = obj.__dict__[self.func.__name__] = self.func(obj)
-        return value
-
-
-def get_installed_version(dist_name, working_set=None):
-    """Get the installed version of dist_name avoiding pkg_resources cache"""
-    # Create a requirement that we'll look for inside of setuptools.
-    req = pkg_resources.Requirement.parse(dist_name)
-
-    if working_set is None:
-        # We want to avoid having this cached, so we need to construct a new
-        # working set each time.
-        working_set = pkg_resources.WorkingSet()
-
-    # Get the installed distribution from our working set
-    dist = working_set.find(req)
-
-    # Check to see if we got an installed distribution or not, if we did
-    # we want to return it's version.
-    return dist.version if dist else None
-
-
-def consume(iterator):
-    """Consume an iterable at C speed."""
-    deque(iterator, maxlen=0)
-
-
-# Simulates an enum
-def enum(*sequential, **named):
-    enums = dict(zip(sequential, range(len(sequential))), **named)
-    reverse = {value: key for key, value in enums.items()}
-    enums['reverse_mapping'] = reverse
-    return type('Enum', (), enums)
-
-
-def make_vcs_requirement_url(repo_url, rev, project_name, subdir=None):
-    """
-    Return the URL for a VCS requirement.
-
-    Args:
-      repo_url: the remote VCS url, with any needed VCS prefix (e.g. "git+").
-      project_name: the (unescaped) project name.
-    """
-    egg_project_name = pkg_resources.to_filename(project_name)
-    req = '{}@{}#egg={}'.format(repo_url, rev, egg_project_name)
-    if subdir:
-        req += '&subdirectory={}'.format(subdir)
-
-    return req
-
-
-def split_auth_from_netloc(netloc):
-    """
-    Parse out and remove the auth information from a netloc.
-
-    Returns: (netloc, (username, password)).
-    """
-    if '@' not in netloc:
-        return netloc, (None, None)
-
-    # Split from the right because that's how urllib.parse.urlsplit()
-    # behaves if more than one @ is present (which can be checked using
-    # the password attribute of urlsplit()'s return value).
-    auth, netloc = netloc.rsplit('@', 1)
-    if ':' in auth:
-        # Split from the left because that's how urllib.parse.urlsplit()
-        # behaves if more than one : is present (which again can be checked
-        # using the password attribute of the return value)
-        user_pass = auth.split(':', 1)
-    else:
-        user_pass = auth, None
-
-    user_pass = tuple(
-        None if x is None else urllib_unquote(x) for x in user_pass
-    )
-
-    return netloc, user_pass
-
-
-def redact_netloc(netloc):
-    # type: (str) -> str
-    """
-    Replace the password in a netloc with "****", if it exists.
-
-    For example, "user:pass@example.com" returns "user:****@example.com".
-    """
-    netloc, (user, password) = split_auth_from_netloc(netloc)
-    if user is None:
-        return netloc
-    password = '' if password is None else ':****'
-    return '{user}{password}@{netloc}'.format(user=urllib_parse.quote(user),
-                                              password=password,
-                                              netloc=netloc)
-
-
-def _transform_url(url, transform_netloc):
-    purl = urllib_parse.urlsplit(url)
-    netloc = transform_netloc(purl.netloc)
-    # stripped url
-    url_pieces = (
-        purl.scheme, netloc, purl.path, purl.query, purl.fragment
-    )
-    surl = urllib_parse.urlunsplit(url_pieces)
-    return surl
-
-
-def _get_netloc(netloc):
-    return split_auth_from_netloc(netloc)[0]
-
-
-def remove_auth_from_url(url):
-    # type: (str) -> str
-    # Return a copy of url with 'username:password@' removed.
-    # username/pass params are passed to subversion through flags
-    # and are not recognized in the url.
-    return _transform_url(url, _get_netloc)
-
-
-def redact_password_from_url(url):
-    # type: (str) -> str
-    """Replace the password in a given url with ****."""
-    return _transform_url(url, redact_netloc)
-
-
-def protect_pip_from_modification_on_windows(modifying_pip):
-    """Protection of pip.exe from modification on Windows
-
-    On Windows, any operation modifying pip should be run as:
-        python -m pip ...
-    """
-    pip_names = [
-        "pip.exe",
-        "pip{}.exe".format(sys.version_info[0]),
-        "pip{}.{}.exe".format(*sys.version_info[:2])
-    ]
-
-    # See https://github.com/pypa/pip/issues/1299 for more discussion
-    should_show_use_python_msg = (
-        modifying_pip and
-        WINDOWS and
-        os.path.basename(sys.argv[0]) in pip_names
-    )
-
-    if should_show_use_python_msg:
-        new_command = [
-            sys.executable, "-m", "pip"
-        ] + sys.argv[1:]
-        raise CommandError(
-            'To modify pip, please run the following command:\n{}'
-            .format(" ".join(new_command))
-        )
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/models.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/models.py
deleted file mode 100644
index d5cb80a..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/models.py
+++ /dev/null
@@ -1,40 +0,0 @@
-"""Utilities for defining models
-"""
-
-import operator
-
-
-class KeyBasedCompareMixin(object):
-    """Provides comparision capabilities that is based on a key
-    """
-
-    def __init__(self, key, defining_class):
-        self._compare_key = key
-        self._defining_class = defining_class
-
-    def __hash__(self):
-        return hash(self._compare_key)
-
-    def __lt__(self, other):
-        return self._compare(other, operator.__lt__)
-
-    def __le__(self, other):
-        return self._compare(other, operator.__le__)
-
-    def __gt__(self, other):
-        return self._compare(other, operator.__gt__)
-
-    def __ge__(self, other):
-        return self._compare(other, operator.__ge__)
-
-    def __eq__(self, other):
-        return self._compare(other, operator.__eq__)
-
-    def __ne__(self, other):
-        return self._compare(other, operator.__ne__)
-
-    def _compare(self, other, method):
-        if not isinstance(other, self._defining_class):
-            return NotImplemented
-
-        return method(self._compare_key, other._compare_key)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/outdated.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/outdated.py
deleted file mode 100644
index 37c47a4..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/outdated.py
+++ /dev/null
@@ -1,164 +0,0 @@
-from __future__ import absolute_import
-
-import datetime
-import json
-import logging
-import os.path
-import sys
-
-from pip._vendor import lockfile, pkg_resources
-from pip._vendor.packaging import version as packaging_version
-
-from pip._internal.index import PackageFinder
-from pip._internal.utils.compat import WINDOWS
-from pip._internal.utils.filesystem import check_path_owner
-from pip._internal.utils.misc import ensure_dir, get_installed_version
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if MYPY_CHECK_RUNNING:
-    import optparse  # noqa: F401
-    from typing import Any, Dict  # noqa: F401
-    from pip._internal.download import PipSession  # noqa: F401
-
-
-SELFCHECK_DATE_FMT = "%Y-%m-%dT%H:%M:%SZ"
-
-
-logger = logging.getLogger(__name__)
-
-
-class SelfCheckState(object):
-    def __init__(self, cache_dir):
-        # type: (str) -> None
-        self.state = {}  # type: Dict[str, Any]
-        self.statefile_path = None
-
-        # Try to load the existing state
-        if cache_dir:
-            self.statefile_path = os.path.join(cache_dir, "selfcheck.json")
-            try:
-                with open(self.statefile_path) as statefile:
-                    self.state = json.load(statefile)[sys.prefix]
-            except (IOError, ValueError, KeyError):
-                # Explicitly suppressing exceptions, since we don't want to
-                # error out if the cache file is invalid.
-                pass
-
-    def save(self, pypi_version, current_time):
-        # type: (str, datetime.datetime) -> None
-        # If we do not have a path to cache in, don't bother saving.
-        if not self.statefile_path:
-            return
-
-        # Check to make sure that we own the directory
-        if not check_path_owner(os.path.dirname(self.statefile_path)):
-            return
-
-        # Now that we've ensured the directory is owned by this user, we'll go
-        # ahead and make sure that all our directories are created.
-        ensure_dir(os.path.dirname(self.statefile_path))
-
-        # Attempt to write out our version check file
-        with lockfile.LockFile(self.statefile_path):
-            if os.path.exists(self.statefile_path):
-                with open(self.statefile_path) as statefile:
-                    state = json.load(statefile)
-            else:
-                state = {}
-
-            state[sys.prefix] = {
-                "last_check": current_time.strftime(SELFCHECK_DATE_FMT),
-                "pypi_version": pypi_version,
-            }
-
-            with open(self.statefile_path, "w") as statefile:
-                json.dump(state, statefile, sort_keys=True,
-                          separators=(",", ":"))
-
-
-def was_installed_by_pip(pkg):
-    # type: (str) -> bool
-    """Checks whether pkg was installed by pip
-
-    This is used not to display the upgrade message when pip is in fact
-    installed by system package manager, such as dnf on Fedora.
-    """
-    try:
-        dist = pkg_resources.get_distribution(pkg)
-        return (dist.has_metadata('INSTALLER') and
-                'pip' in dist.get_metadata_lines('INSTALLER'))
-    except pkg_resources.DistributionNotFound:
-        return False
-
-
-def pip_version_check(session, options):
-    # type: (PipSession, optparse.Values) -> None
-    """Check for an update for pip.
-
-    Limit the frequency of checks to once per week. State is stored either in
-    the active virtualenv or in the user's USER_CACHE_DIR keyed off the prefix
-    of the pip script path.
-    """
-    installed_version = get_installed_version("pip")
-    if not installed_version:
-        return
-
-    pip_version = packaging_version.parse(installed_version)
-    pypi_version = None
-
-    try:
-        state = SelfCheckState(cache_dir=options.cache_dir)
-
-        current_time = datetime.datetime.utcnow()
-        # Determine if we need to refresh the state
-        if "last_check" in state.state and "pypi_version" in state.state:
-            last_check = datetime.datetime.strptime(
-                state.state["last_check"],
-                SELFCHECK_DATE_FMT
-            )
-            if (current_time - last_check).total_seconds() < 7 * 24 * 60 * 60:
-                pypi_version = state.state["pypi_version"]
-
-        # Refresh the version if we need to or just see if we need to warn
-        if pypi_version is None:
-            # Lets use PackageFinder to see what the latest pip version is
-            finder = PackageFinder(
-                find_links=options.find_links,
-                index_urls=[options.index_url] + options.extra_index_urls,
-                allow_all_prereleases=False,  # Explicitly set to False
-                trusted_hosts=options.trusted_hosts,
-                session=session,
-            )
-            all_candidates = finder.find_all_candidates("pip")
-            if not all_candidates:
-                return
-            pypi_version = str(
-                max(all_candidates, key=lambda c: c.version).version
-            )
-
-            # save that we've performed a check
-            state.save(pypi_version, current_time)
-
-        remote_version = packaging_version.parse(pypi_version)
-
-        # Determine if our pypi_version is older
-        if (pip_version < remote_version and
-                pip_version.base_version != remote_version.base_version and
-                was_installed_by_pip('pip')):
-            # Advise "python -m pip" on Windows to avoid issues
-            # with overwriting pip.exe.
-            if WINDOWS:
-                pip_cmd = "python -m pip"
-            else:
-                pip_cmd = "pip"
-            logger.warning(
-                "You are using pip version %s, however version %s is "
-                "available.\nYou should consider upgrading via the "
-                "'%s install --upgrade pip' command.",
-                pip_version, pypi_version, pip_cmd
-            )
-    except Exception:
-        logger.debug(
-            "There was an error checking the latest version of pip",
-            exc_info=True,
-        )
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/packaging.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/packaging.py
deleted file mode 100644
index 7aaf7b5..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/packaging.py
+++ /dev/null
@@ -1,85 +0,0 @@
-from __future__ import absolute_import
-
-import logging
-import sys
-from email.parser import FeedParser
-
-from pip._vendor import pkg_resources
-from pip._vendor.packaging import specifiers, version
-
-from pip._internal import exceptions
-from pip._internal.utils.misc import display_path
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if MYPY_CHECK_RUNNING:
-    from typing import Optional  # noqa: F401
-    from email.message import Message  # noqa: F401
-    from pip._vendor.pkg_resources import Distribution  # noqa: F401
-
-
-logger = logging.getLogger(__name__)
-
-
-def check_requires_python(requires_python):
-    # type: (Optional[str]) -> bool
-    """
-    Check if the python version in use match the `requires_python` specifier.
-
-    Returns `True` if the version of python in use matches the requirement.
-    Returns `False` if the version of python in use does not matches the
-    requirement.
-
-    Raises an InvalidSpecifier if `requires_python` have an invalid format.
-    """
-    if requires_python is None:
-        # The package provides no information
-        return True
-    requires_python_specifier = specifiers.SpecifierSet(requires_python)
-
-    # We only use major.minor.micro
-    python_version = version.parse('.'.join(map(str, sys.version_info[:3])))
-    return python_version in requires_python_specifier
-
-
-def get_metadata(dist):
-    # type: (Distribution) -> Message
-    if (isinstance(dist, pkg_resources.DistInfoDistribution) and
-            dist.has_metadata('METADATA')):
-        metadata = dist.get_metadata('METADATA')
-    elif dist.has_metadata('PKG-INFO'):
-        metadata = dist.get_metadata('PKG-INFO')
-    else:
-        logger.warning("No metadata found in %s", display_path(dist.location))
-        metadata = ''
-
-    feed_parser = FeedParser()
-    feed_parser.feed(metadata)
-    return feed_parser.close()
-
-
-def check_dist_requires_python(dist):
-    pkg_info_dict = get_metadata(dist)
-    requires_python = pkg_info_dict.get('Requires-Python')
-    try:
-        if not check_requires_python(requires_python):
-            raise exceptions.UnsupportedPythonVersion(
-                "%s requires Python '%s' but the running Python is %s" % (
-                    dist.project_name,
-                    requires_python,
-                    '.'.join(map(str, sys.version_info[:3])),)
-            )
-    except specifiers.InvalidSpecifier as e:
-        logger.warning(
-            "Package %s has an invalid Requires-Python entry %s - %s",
-            dist.project_name, requires_python, e,
-        )
-        return
-
-
-def get_installer(dist):
-    # type: (Distribution) -> str
-    if dist.has_metadata('INSTALLER'):
-        for line in dist.get_metadata_lines('INSTALLER'):
-            if line.strip():
-                return line.strip()
-    return ''
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/setuptools_build.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/setuptools_build.py
deleted file mode 100644
index 03973e9..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/setuptools_build.py
+++ /dev/null
@@ -1,8 +0,0 @@
-# Shim to wrap setup.py invocation with setuptools
-SETUPTOOLS_SHIM = (
-    "import setuptools, tokenize;__file__=%r;"
-    "f=getattr(tokenize, 'open', open)(__file__);"
-    "code=f.read().replace('\\r\\n', '\\n');"
-    "f.close();"
-    "exec(compile(code, __file__, 'exec'))"
-)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/temp_dir.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/temp_dir.py
deleted file mode 100644
index 2c81ad5..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/temp_dir.py
+++ /dev/null
@@ -1,155 +0,0 @@
-from __future__ import absolute_import
-
-import errno
-import itertools
-import logging
-import os.path
-import tempfile
-
-from pip._internal.utils.misc import rmtree
-
-logger = logging.getLogger(__name__)
-
-
-class TempDirectory(object):
-    """Helper class that owns and cleans up a temporary directory.
-
-    This class can be used as a context manager or as an OO representation of a
-    temporary directory.
-
-    Attributes:
-        path
-            Location to the created temporary directory or None
-        delete
-            Whether the directory should be deleted when exiting
-            (when used as a contextmanager)
-
-    Methods:
-        create()
-            Creates a temporary directory and stores its path in the path
-            attribute.
-        cleanup()
-            Deletes the temporary directory and sets path attribute to None
-
-    When used as a context manager, a temporary directory is created on
-    entering the context and, if the delete attribute is True, on exiting the
-    context the created directory is deleted.
-    """
-
-    def __init__(self, path=None, delete=None, kind="temp"):
-        super(TempDirectory, self).__init__()
-
-        if path is None and delete is None:
-            # If we were not given an explicit directory, and we were not given
-            # an explicit delete option, then we'll default to deleting.
-            delete = True
-
-        self.path = path
-        self.delete = delete
-        self.kind = kind
-
-    def __repr__(self):
-        return "<{} {!r}>".format(self.__class__.__name__, self.path)
-
-    def __enter__(self):
-        self.create()
-        return self
-
-    def __exit__(self, exc, value, tb):
-        if self.delete:
-            self.cleanup()
-
-    def create(self):
-        """Create a temporary directory and store its path in self.path
-        """
-        if self.path is not None:
-            logger.debug(
-                "Skipped creation of temporary directory: {}".format(self.path)
-            )
-            return
-        # We realpath here because some systems have their default tmpdir
-        # symlinked to another directory.  This tends to confuse build
-        # scripts, so we canonicalize the path by traversing potential
-        # symlinks here.
-        self.path = os.path.realpath(
-            tempfile.mkdtemp(prefix="pip-{}-".format(self.kind))
-        )
-        logger.debug("Created temporary directory: {}".format(self.path))
-
-    def cleanup(self):
-        """Remove the temporary directory created and reset state
-        """
-        if self.path is not None and os.path.exists(self.path):
-            rmtree(self.path)
-        self.path = None
-
-
-class AdjacentTempDirectory(TempDirectory):
-    """Helper class that creates a temporary directory adjacent to a real one.
-
-    Attributes:
-        original
-            The original directory to create a temp directory for.
-        path
-            After calling create() or entering, contains the full
-            path to the temporary directory.
-        delete
-            Whether the directory should be deleted when exiting
-            (when used as a contextmanager)
-
-    """
-    # The characters that may be used to name the temp directory
-    # We always prepend a ~ and then rotate through these until
-    # a usable name is found.
-    # pkg_resources raises a different error for .dist-info folder
-    # with leading '-' and invalid metadata
-    LEADING_CHARS = "-~.=%0123456789"
-
-    def __init__(self, original, delete=None):
-        super(AdjacentTempDirectory, self).__init__(delete=delete)
-        self.original = original.rstrip('/\\')
-
-    @classmethod
-    def _generate_names(cls, name):
-        """Generates a series of temporary names.
-
-        The algorithm replaces the leading characters in the name
-        with ones that are valid filesystem characters, but are not
-        valid package names (for both Python and pip definitions of
-        package).
-        """
-        for i in range(1, len(name)):
-            for candidate in itertools.combinations_with_replacement(
-                    cls.LEADING_CHARS, i - 1):
-                new_name = '~' + ''.join(candidate) + name[i:]
-                if new_name != name:
-                    yield new_name
-
-        # If we make it this far, we will have to make a longer name
-        for i in range(len(cls.LEADING_CHARS)):
-            for candidate in itertools.combinations_with_replacement(
-                    cls.LEADING_CHARS, i):
-                new_name = '~' + ''.join(candidate) + name
-                if new_name != name:
-                    yield new_name
-
-    def create(self):
-        root, name = os.path.split(self.original)
-        for candidate in self._generate_names(name):
-            path = os.path.join(root, candidate)
-            try:
-                os.mkdir(path)
-            except OSError as ex:
-                # Continue if the name exists already
-                if ex.errno != errno.EEXIST:
-                    raise
-            else:
-                self.path = os.path.realpath(path)
-                break
-
-        if not self.path:
-            # Final fallback on the default behavior.
-            self.path = os.path.realpath(
-                tempfile.mkdtemp(prefix="pip-{}-".format(self.kind))
-            )
-        logger.debug("Created temporary directory: {}".format(self.path))
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/typing.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/typing.py
deleted file mode 100644
index e085cdf..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/typing.py
+++ /dev/null
@@ -1,29 +0,0 @@
-"""For neatly implementing static typing in pip.
-
-`mypy` - the static type analysis tool we use - uses the `typing` module, which
-provides core functionality fundamental to mypy's functioning.
-
-Generally, `typing` would be imported at runtime and used in that fashion -
-it acts as a no-op at runtime and does not have any run-time overhead by
-design.
-
-As it turns out, `typing` is not vendorable - it uses separate sources for
-Python 2/Python 3. Thus, this codebase can not expect it to be present.
-To work around this, mypy allows the typing import to be behind a False-y
-optional to prevent it from running at runtime and type-comments can be used
-to remove the need for the types to be accessible directly during runtime.
-
-This module provides the False-y guard in a nicely named fashion so that a
-curious maintainer can reach here to read this.
-
-In pip, all static-typing related imports should be guarded as follows:
-
-    from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-    if MYPY_CHECK_RUNNING:
-        from typing import ...  # noqa: F401
-
-Ref: https://github.com/python/mypy/issues/3216
-"""
-
-MYPY_CHECK_RUNNING = False
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/ui.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/ui.py
deleted file mode 100644
index 433675d..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/utils/ui.py
+++ /dev/null
@@ -1,441 +0,0 @@
-from __future__ import absolute_import, division
-
-import contextlib
-import itertools
-import logging
-import sys
-import time
-from signal import SIGINT, default_int_handler, signal
-
-from pip._vendor import six
-from pip._vendor.progress.bar import (
-    Bar, ChargingBar, FillingCirclesBar, FillingSquaresBar, IncrementalBar,
-    ShadyBar,
-)
-from pip._vendor.progress.helpers import HIDE_CURSOR, SHOW_CURSOR, WritelnMixin
-from pip._vendor.progress.spinner import Spinner
-
-from pip._internal.utils.compat import WINDOWS
-from pip._internal.utils.logging import get_indentation
-from pip._internal.utils.misc import format_size
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if MYPY_CHECK_RUNNING:
-    from typing import Any, Iterator, IO  # noqa: F401
-
-try:
-    from pip._vendor import colorama
-# Lots of different errors can come from this, including SystemError and
-# ImportError.
-except Exception:
-    colorama = None
-
-logger = logging.getLogger(__name__)
-
-
-def _select_progress_class(preferred, fallback):
-    encoding = getattr(preferred.file, "encoding", None)
-
-    # If we don't know what encoding this file is in, then we'll just assume
-    # that it doesn't support unicode and use the ASCII bar.
-    if not encoding:
-        return fallback
-
-    # Collect all of the possible characters we want to use with the preferred
-    # bar.
-    characters = [
-        getattr(preferred, "empty_fill", six.text_type()),
-        getattr(preferred, "fill", six.text_type()),
-    ]
-    characters += list(getattr(preferred, "phases", []))
-
-    # Try to decode the characters we're using for the bar using the encoding
-    # of the given file, if this works then we'll assume that we can use the
-    # fancier bar and if not we'll fall back to the plaintext bar.
-    try:
-        six.text_type().join(characters).encode(encoding)
-    except UnicodeEncodeError:
-        return fallback
-    else:
-        return preferred
-
-
-_BaseBar = _select_progress_class(IncrementalBar, Bar)  # type: Any
-
-
-class InterruptibleMixin(object):
-    """
-    Helper to ensure that self.finish() gets called on keyboard interrupt.
-
-    This allows downloads to be interrupted without leaving temporary state
-    (like hidden cursors) behind.
-
-    This class is similar to the progress library's existing SigIntMixin
-    helper, but as of version 1.2, that helper has the following problems:
-
-    1. It calls sys.exit().
-    2. It discards the existing SIGINT handler completely.
-    3. It leaves its own handler in place even after an uninterrupted finish,
-       which will have unexpected delayed effects if the user triggers an
-       unrelated keyboard interrupt some time after a progress-displaying
-       download has already completed, for example.
-    """
-
-    def __init__(self, *args, **kwargs):
-        """
-        Save the original SIGINT handler for later.
-        """
-        super(InterruptibleMixin, self).__init__(*args, **kwargs)
-
-        self.original_handler = signal(SIGINT, self.handle_sigint)
-
-        # If signal() returns None, the previous handler was not installed from
-        # Python, and we cannot restore it. This probably should not happen,
-        # but if it does, we must restore something sensible instead, at least.
-        # The least bad option should be Python's default SIGINT handler, which
-        # just raises KeyboardInterrupt.
-        if self.original_handler is None:
-            self.original_handler = default_int_handler
-
-    def finish(self):
-        """
-        Restore the original SIGINT handler after finishing.
-
-        This should happen regardless of whether the progress display finishes
-        normally, or gets interrupted.
-        """
-        super(InterruptibleMixin, self).finish()
-        signal(SIGINT, self.original_handler)
-
-    def handle_sigint(self, signum, frame):
-        """
-        Call self.finish() before delegating to the original SIGINT handler.
-
-        This handler should only be in place while the progress display is
-        active.
-        """
-        self.finish()
-        self.original_handler(signum, frame)
-
-
-class SilentBar(Bar):
-
-    def update(self):
-        pass
-
-
-class BlueEmojiBar(IncrementalBar):
-
-    suffix = "%(percent)d%%"
-    bar_prefix = " "
-    bar_suffix = " "
-    phases = (u"\U0001F539", u"\U0001F537", u"\U0001F535")  # type: Any
-
-
-class DownloadProgressMixin(object):
-
-    def __init__(self, *args, **kwargs):
-        super(DownloadProgressMixin, self).__init__(*args, **kwargs)
-        self.message = (" " * (get_indentation() + 2)) + self.message
-
-    @property
-    def downloaded(self):
-        return format_size(self.index)
-
-    @property
-    def download_speed(self):
-        # Avoid zero division errors...
-        if self.avg == 0.0:
-            return "..."
-        return format_size(1 / self.avg) + "/s"
-
-    @property
-    def pretty_eta(self):
-        if self.eta:
-            return "eta %s" % self.eta_td
-        return ""
-
-    def iter(self, it, n=1):
-        for x in it:
-            yield x
-            self.next(n)
-        self.finish()
-
-
-class WindowsMixin(object):
-
-    def __init__(self, *args, **kwargs):
-        # The Windows terminal does not support the hide/show cursor ANSI codes
-        # even with colorama. So we'll ensure that hide_cursor is False on
-        # Windows.
-        # This call neds to go before the super() call, so that hide_cursor
-        # is set in time. The base progress bar class writes the "hide cursor"
-        # code to the terminal in its init, so if we don't set this soon
-        # enough, we get a "hide" with no corresponding "show"...
-        if WINDOWS and self.hide_cursor:
-            self.hide_cursor = False
-
-        super(WindowsMixin, self).__init__(*args, **kwargs)
-
-        # Check if we are running on Windows and we have the colorama module,
-        # if we do then wrap our file with it.
-        if WINDOWS and colorama:
-            self.file = colorama.AnsiToWin32(self.file)
-            # The progress code expects to be able to call self.file.isatty()
-            # but the colorama.AnsiToWin32() object doesn't have that, so we'll
-            # add it.
-            self.file.isatty = lambda: self.file.wrapped.isatty()
-            # The progress code expects to be able to call self.file.flush()
-            # but the colorama.AnsiToWin32() object doesn't have that, so we'll
-            # add it.
-            self.file.flush = lambda: self.file.wrapped.flush()
-
-
-class BaseDownloadProgressBar(WindowsMixin, InterruptibleMixin,
-                              DownloadProgressMixin):
-
-    file = sys.stdout
-    message = "%(percent)d%%"
-    suffix = "%(downloaded)s %(download_speed)s %(pretty_eta)s"
-
-# NOTE: The "type: ignore" comments on the following classes are there to
-#       work around https://github.com/python/typing/issues/241
-
-
-class DefaultDownloadProgressBar(BaseDownloadProgressBar,
-                                 _BaseBar):
-    pass
-
-
-class DownloadSilentBar(BaseDownloadProgressBar, SilentBar):  # type: ignore
-    pass
-
-
-class DownloadIncrementalBar(BaseDownloadProgressBar,  # type: ignore
-                             IncrementalBar):
-    pass
-
-
-class DownloadChargingBar(BaseDownloadProgressBar,  # type: ignore
-                          ChargingBar):
-    pass
-
-
-class DownloadShadyBar(BaseDownloadProgressBar, ShadyBar):  # type: ignore
-    pass
-
-
-class DownloadFillingSquaresBar(BaseDownloadProgressBar,  # type: ignore
-                                FillingSquaresBar):
-    pass
-
-
-class DownloadFillingCirclesBar(BaseDownloadProgressBar,  # type: ignore
-                                FillingCirclesBar):
-    pass
-
-
-class DownloadBlueEmojiProgressBar(BaseDownloadProgressBar,  # type: ignore
-                                   BlueEmojiBar):
-    pass
-
-
-class DownloadProgressSpinner(WindowsMixin, InterruptibleMixin,
-                              DownloadProgressMixin, WritelnMixin, Spinner):
-
-    file = sys.stdout
-    suffix = "%(downloaded)s %(download_speed)s"
-
-    def next_phase(self):
-        if not hasattr(self, "_phaser"):
-            self._phaser = itertools.cycle(self.phases)
-        return next(self._phaser)
-
-    def update(self):
-        message = self.message % self
-        phase = self.next_phase()
-        suffix = self.suffix % self
-        line = ''.join([
-            message,
-            " " if message else "",
-            phase,
-            " " if suffix else "",
-            suffix,
-        ])
-
-        self.writeln(line)
-
-
-BAR_TYPES = {
-    "off": (DownloadSilentBar, DownloadSilentBar),
-    "on": (DefaultDownloadProgressBar, DownloadProgressSpinner),
-    "ascii": (DownloadIncrementalBar, DownloadProgressSpinner),
-    "pretty": (DownloadFillingCirclesBar, DownloadProgressSpinner),
-    "emoji": (DownloadBlueEmojiProgressBar, DownloadProgressSpinner)
-}
-
-
-def DownloadProgressProvider(progress_bar, max=None):
-    if max is None or max == 0:
-        return BAR_TYPES[progress_bar][1]().iter
-    else:
-        return BAR_TYPES[progress_bar][0](max=max).iter
-
-
-################################################################
-# Generic "something is happening" spinners
-#
-# We don't even try using progress.spinner.Spinner here because it's actually
-# simpler to reimplement from scratch than to coerce their code into doing
-# what we need.
-################################################################
-
-@contextlib.contextmanager
-def hidden_cursor(file):
-    # type: (IO) -> Iterator[None]
-    # The Windows terminal does not support the hide/show cursor ANSI codes,
-    # even via colorama. So don't even try.
-    if WINDOWS:
-        yield
-    # We don't want to clutter the output with control characters if we're
-    # writing to a file, or if the user is running with --quiet.
-    # See https://github.com/pypa/pip/issues/3418
-    elif not file.isatty() or logger.getEffectiveLevel() > logging.INFO:
-        yield
-    else:
-        file.write(HIDE_CURSOR)
-        try:
-            yield
-        finally:
-            file.write(SHOW_CURSOR)
-
-
-class RateLimiter(object):
-    def __init__(self, min_update_interval_seconds):
-        # type: (float) -> None
-        self._min_update_interval_seconds = min_update_interval_seconds
-        self._last_update = 0  # type: float
-
-    def ready(self):
-        # type: () -> bool
-        now = time.time()
-        delta = now - self._last_update
-        return delta >= self._min_update_interval_seconds
-
-    def reset(self):
-        # type: () -> None
-        self._last_update = time.time()
-
-
-class SpinnerInterface(object):
-    def spin(self):
-        # type: () -> None
-        raise NotImplementedError()
-
-    def finish(self, final_status):
-        # type: (str) -> None
-        raise NotImplementedError()
-
-
-class InteractiveSpinner(SpinnerInterface):
-    def __init__(self, message, file=None, spin_chars="-\\|/",
-                 # Empirically, 8 updates/second looks nice
-                 min_update_interval_seconds=0.125):
-        self._message = message
-        if file is None:
-            file = sys.stdout
-        self._file = file
-        self._rate_limiter = RateLimiter(min_update_interval_seconds)
-        self._finished = False
-
-        self._spin_cycle = itertools.cycle(spin_chars)
-
-        self._file.write(" " * get_indentation() + self._message + " ... ")
-        self._width = 0
-
-    def _write(self, status):
-        assert not self._finished
-        # Erase what we wrote before by backspacing to the beginning, writing
-        # spaces to overwrite the old text, and then backspacing again
-        backup = "\b" * self._width
-        self._file.write(backup + " " * self._width + backup)
-        # Now we have a blank slate to add our status
-        self._file.write(status)
-        self._width = len(status)
-        self._file.flush()
-        self._rate_limiter.reset()
-
-    def spin(self):
-        # type: () -> None
-        if self._finished:
-            return
-        if not self._rate_limiter.ready():
-            return
-        self._write(next(self._spin_cycle))
-
-    def finish(self, final_status):
-        # type: (str) -> None
-        if self._finished:
-            return
-        self._write(final_status)
-        self._file.write("\n")
-        self._file.flush()
-        self._finished = True
-
-
-# Used for dumb terminals, non-interactive installs (no tty), etc.
-# We still print updates occasionally (once every 60 seconds by default) to
-# act as a keep-alive for systems like Travis-CI that take lack-of-output as
-# an indication that a task has frozen.
-class NonInteractiveSpinner(SpinnerInterface):
-    def __init__(self, message, min_update_interval_seconds=60):
-        # type: (str, float) -> None
-        self._message = message
-        self._finished = False
-        self._rate_limiter = RateLimiter(min_update_interval_seconds)
-        self._update("started")
-
-    def _update(self, status):
-        assert not self._finished
-        self._rate_limiter.reset()
-        logger.info("%s: %s", self._message, status)
-
-    def spin(self):
-        # type: () -> None
-        if self._finished:
-            return
-        if not self._rate_limiter.ready():
-            return
-        self._update("still running...")
-
-    def finish(self, final_status):
-        # type: (str) -> None
-        if self._finished:
-            return
-        self._update("finished with status '%s'" % (final_status,))
-        self._finished = True
-
-
-@contextlib.contextmanager
-def open_spinner(message):
-    # type: (str) -> Iterator[SpinnerInterface]
-    # Interactive spinner goes directly to sys.stdout rather than being routed
-    # through the logging system, but it acts like it has level INFO,
-    # i.e. it's only displayed if we're at level INFO or better.
-    # Non-interactive spinner goes through the logging system, so it is always
-    # in sync with logging configuration.
-    if sys.stdout.isatty() and logger.getEffectiveLevel() <= logging.INFO:
-        spinner = InteractiveSpinner(message)  # type: SpinnerInterface
-    else:
-        spinner = NonInteractiveSpinner(message)
-    try:
-        with hidden_cursor(sys.stdout):
-            yield spinner
-    except KeyboardInterrupt:
-        spinner.finish("canceled")
-        raise
-    except Exception:
-        spinner.finish("error")
-        raise
-    else:
-        spinner.finish("done")
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/vcs/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/vcs/__init__.py
deleted file mode 100644
index 9cba764..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/vcs/__init__.py
+++ /dev/null
@@ -1,534 +0,0 @@
-"""Handles all VCS (version control) support"""
-from __future__ import absolute_import
-
-import errno
-import logging
-import os
-import shutil
-import sys
-
-from pip._vendor.six.moves.urllib import parse as urllib_parse
-
-from pip._internal.exceptions import BadCommand
-from pip._internal.utils.misc import (
-    display_path, backup_dir, call_subprocess, rmtree, ask_path_exists,
-)
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if MYPY_CHECK_RUNNING:
-    from typing import (  # noqa: F401
-        Any, Dict, Iterable, List, Mapping, Optional, Text, Tuple, Type
-    )
-    from pip._internal.utils.ui import SpinnerInterface  # noqa: F401
-
-    AuthInfo = Tuple[Optional[str], Optional[str]]
-
-__all__ = ['vcs']
-
-
-logger = logging.getLogger(__name__)
-
-
-class RemoteNotFoundError(Exception):
-    pass
-
-
-class RevOptions(object):
-
-    """
-    Encapsulates a VCS-specific revision to install, along with any VCS
-    install options.
-
-    Instances of this class should be treated as if immutable.
-    """
-
-    def __init__(self, vcs, rev=None, extra_args=None):
-        # type: (VersionControl, Optional[str], Optional[List[str]]) -> None
-        """
-        Args:
-          vcs: a VersionControl object.
-          rev: the name of the revision to install.
-          extra_args: a list of extra options.
-        """
-        if extra_args is None:
-            extra_args = []
-
-        self.extra_args = extra_args
-        self.rev = rev
-        self.vcs = vcs
-
-    def __repr__(self):
-        return '<RevOptions {}: rev={!r}>'.format(self.vcs.name, self.rev)
-
-    @property
-    def arg_rev(self):
-        # type: () -> Optional[str]
-        if self.rev is None:
-            return self.vcs.default_arg_rev
-
-        return self.rev
-
-    def to_args(self):
-        # type: () -> List[str]
-        """
-        Return the VCS-specific command arguments.
-        """
-        args = []  # type: List[str]
-        rev = self.arg_rev
-        if rev is not None:
-            args += self.vcs.get_base_rev_args(rev)
-        args += self.extra_args
-
-        return args
-
-    def to_display(self):
-        # type: () -> str
-        if not self.rev:
-            return ''
-
-        return ' (to revision {})'.format(self.rev)
-
-    def make_new(self, rev):
-        # type: (str) -> RevOptions
-        """
-        Make a copy of the current instance, but with a new rev.
-
-        Args:
-          rev: the name of the revision for the new object.
-        """
-        return self.vcs.make_rev_options(rev, extra_args=self.extra_args)
-
-
-class VcsSupport(object):
-    _registry = {}  # type: Dict[str, Type[VersionControl]]
-    schemes = ['ssh', 'git', 'hg', 'bzr', 'sftp', 'svn']
-
-    def __init__(self):
-        # type: () -> None
-        # Register more schemes with urlparse for various version control
-        # systems
-        urllib_parse.uses_netloc.extend(self.schemes)
-        # Python >= 2.7.4, 3.3 doesn't have uses_fragment
-        if getattr(urllib_parse, 'uses_fragment', None):
-            urllib_parse.uses_fragment.extend(self.schemes)
-        super(VcsSupport, self).__init__()
-
-    def __iter__(self):
-        return self._registry.__iter__()
-
-    @property
-    def backends(self):
-        # type: () -> List[Type[VersionControl]]
-        return list(self._registry.values())
-
-    @property
-    def dirnames(self):
-        # type: () -> List[str]
-        return [backend.dirname for backend in self.backends]
-
-    @property
-    def all_schemes(self):
-        # type: () -> List[str]
-        schemes = []  # type: List[str]
-        for backend in self.backends:
-            schemes.extend(backend.schemes)
-        return schemes
-
-    def register(self, cls):
-        # type: (Type[VersionControl]) -> None
-        if not hasattr(cls, 'name'):
-            logger.warning('Cannot register VCS %s', cls.__name__)
-            return
-        if cls.name not in self._registry:
-            self._registry[cls.name] = cls
-            logger.debug('Registered VCS backend: %s', cls.name)
-
-    def unregister(self, cls=None, name=None):
-        # type: (Optional[Type[VersionControl]], Optional[str]) -> None
-        if name in self._registry:
-            del self._registry[name]
-        elif cls in self._registry.values():
-            del self._registry[cls.name]
-        else:
-            logger.warning('Cannot unregister because no class or name given')
-
-    def get_backend_type(self, location):
-        # type: (str) -> Optional[Type[VersionControl]]
-        """
-        Return the type of the version control backend if found at given
-        location, e.g. vcs.get_backend_type('/path/to/vcs/checkout')
-        """
-        for vc_type in self._registry.values():
-            if vc_type.controls_location(location):
-                logger.debug('Determine that %s uses VCS: %s',
-                             location, vc_type.name)
-                return vc_type
-        return None
-
-    def get_backend(self, name):
-        # type: (str) -> Optional[Type[VersionControl]]
-        name = name.lower()
-        if name in self._registry:
-            return self._registry[name]
-        return None
-
-
-vcs = VcsSupport()
-
-
-class VersionControl(object):
-    name = ''
-    dirname = ''
-    repo_name = ''
-    # List of supported schemes for this Version Control
-    schemes = ()  # type: Tuple[str, ...]
-    # Iterable of environment variable names to pass to call_subprocess().
-    unset_environ = ()  # type: Tuple[str, ...]
-    default_arg_rev = None  # type: Optional[str]
-
-    def __init__(self, url=None, *args, **kwargs):
-        self.url = url
-        super(VersionControl, self).__init__(*args, **kwargs)
-
-    def get_base_rev_args(self, rev):
-        """
-        Return the base revision arguments for a vcs command.
-
-        Args:
-          rev: the name of a revision to install.  Cannot be None.
-        """
-        raise NotImplementedError
-
-    def make_rev_options(self, rev=None, extra_args=None):
-        # type: (Optional[str], Optional[List[str]]) -> RevOptions
-        """
-        Return a RevOptions object.
-
-        Args:
-          rev: the name of a revision to install.
-          extra_args: a list of extra options.
-        """
-        return RevOptions(self, rev, extra_args=extra_args)
-
-    @classmethod
-    def _is_local_repository(cls, repo):
-        # type: (str) -> bool
-        """
-           posix absolute paths start with os.path.sep,
-           win32 ones start with drive (like c:\\folder)
-        """
-        drive, tail = os.path.splitdrive(repo)
-        return repo.startswith(os.path.sep) or bool(drive)
-
-    def export(self, location):
-        """
-        Export the repository at the url to the destination location
-        i.e. only download the files, without vcs informations
-        """
-        raise NotImplementedError
-
-    def get_netloc_and_auth(self, netloc, scheme):
-        """
-        Parse the repository URL's netloc, and return the new netloc to use
-        along with auth information.
-
-        Args:
-          netloc: the original repository URL netloc.
-          scheme: the repository URL's scheme without the vcs prefix.
-
-        This is mainly for the Subversion class to override, so that auth
-        information can be provided via the --username and --password options
-        instead of through the URL.  For other subclasses like Git without
-        such an option, auth information must stay in the URL.
-
-        Returns: (netloc, (username, password)).
-        """
-        return netloc, (None, None)
-
-    def get_url_rev_and_auth(self, url):
-        # type: (str) -> Tuple[str, Optional[str], AuthInfo]
-        """
-        Parse the repository URL to use, and return the URL, revision,
-        and auth info to use.
-
-        Returns: (url, rev, (username, password)).
-        """
-        scheme, netloc, path, query, frag = urllib_parse.urlsplit(url)
-        if '+' not in scheme:
-            raise ValueError(
-                "Sorry, {!r} is a malformed VCS url. "
-                "The format is <vcs>+<protocol>://<url>, "
-                "e.g. svn+http://myrepo/svn/MyApp#egg=MyApp".format(url)
-            )
-        # Remove the vcs prefix.
-        scheme = scheme.split('+', 1)[1]
-        netloc, user_pass = self.get_netloc_and_auth(netloc, scheme)
-        rev = None
-        if '@' in path:
-            path, rev = path.rsplit('@', 1)
-        url = urllib_parse.urlunsplit((scheme, netloc, path, query, ''))
-        return url, rev, user_pass
-
-    def make_rev_args(self, username, password):
-        """
-        Return the RevOptions "extra arguments" to use in obtain().
-        """
-        return []
-
-    def get_url_rev_options(self, url):
-        # type: (str) -> Tuple[str, RevOptions]
-        """
-        Return the URL and RevOptions object to use in obtain() and in
-        some cases export(), as a tuple (url, rev_options).
-        """
-        url, rev, user_pass = self.get_url_rev_and_auth(url)
-        username, password = user_pass
-        extra_args = self.make_rev_args(username, password)
-        rev_options = self.make_rev_options(rev, extra_args=extra_args)
-
-        return url, rev_options
-
-    def normalize_url(self, url):
-        # type: (str) -> str
-        """
-        Normalize a URL for comparison by unquoting it and removing any
-        trailing slash.
-        """
-        return urllib_parse.unquote(url).rstrip('/')
-
-    def compare_urls(self, url1, url2):
-        # type: (str, str) -> bool
-        """
-        Compare two repo URLs for identity, ignoring incidental differences.
-        """
-        return (self.normalize_url(url1) == self.normalize_url(url2))
-
-    def fetch_new(self, dest, url, rev_options):
-        """
-        Fetch a revision from a repository, in the case that this is the
-        first fetch from the repository.
-
-        Args:
-          dest: the directory to fetch the repository to.
-          rev_options: a RevOptions object.
-        """
-        raise NotImplementedError
-
-    def switch(self, dest, url, rev_options):
-        """
-        Switch the repo at ``dest`` to point to ``URL``.
-
-        Args:
-          rev_options: a RevOptions object.
-        """
-        raise NotImplementedError
-
-    def update(self, dest, url, rev_options):
-        """
-        Update an already-existing repo to the given ``rev_options``.
-
-        Args:
-          rev_options: a RevOptions object.
-        """
-        raise NotImplementedError
-
-    def is_commit_id_equal(self, dest, name):
-        """
-        Return whether the id of the current commit equals the given name.
-
-        Args:
-          dest: the repository directory.
-          name: a string name.
-        """
-        raise NotImplementedError
-
-    def obtain(self, dest):
-        # type: (str) -> None
-        """
-        Install or update in editable mode the package represented by this
-        VersionControl object.
-
-        Args:
-          dest: the repository directory in which to install or update.
-        """
-        url, rev_options = self.get_url_rev_options(self.url)
-
-        if not os.path.exists(dest):
-            self.fetch_new(dest, url, rev_options)
-            return
-
-        rev_display = rev_options.to_display()
-        if self.is_repository_directory(dest):
-            existing_url = self.get_remote_url(dest)
-            if self.compare_urls(existing_url, url):
-                logger.debug(
-                    '%s in %s exists, and has correct URL (%s)',
-                    self.repo_name.title(),
-                    display_path(dest),
-                    url,
-                )
-                if not self.is_commit_id_equal(dest, rev_options.rev):
-                    logger.info(
-                        'Updating %s %s%s',
-                        display_path(dest),
-                        self.repo_name,
-                        rev_display,
-                    )
-                    self.update(dest, url, rev_options)
-                else:
-                    logger.info('Skipping because already up-to-date.')
-                return
-
-            logger.warning(
-                '%s %s in %s exists with URL %s',
-                self.name,
-                self.repo_name,
-                display_path(dest),
-                existing_url,
-            )
-            prompt = ('(s)witch, (i)gnore, (w)ipe, (b)ackup ',
-                      ('s', 'i', 'w', 'b'))
-        else:
-            logger.warning(
-                'Directory %s already exists, and is not a %s %s.',
-                dest,
-                self.name,
-                self.repo_name,
-            )
-            # https://github.com/python/mypy/issues/1174
-            prompt = ('(i)gnore, (w)ipe, (b)ackup ',  # type: ignore
-                      ('i', 'w', 'b'))
-
-        logger.warning(
-            'The plan is to install the %s repository %s',
-            self.name,
-            url,
-        )
-        response = ask_path_exists('What to do?  %s' % prompt[0], prompt[1])
-
-        if response == 'a':
-            sys.exit(-1)
-
-        if response == 'w':
-            logger.warning('Deleting %s', display_path(dest))
-            rmtree(dest)
-            self.fetch_new(dest, url, rev_options)
-            return
-
-        if response == 'b':
-            dest_dir = backup_dir(dest)
-            logger.warning(
-                'Backing up %s to %s', display_path(dest), dest_dir,
-            )
-            shutil.move(dest, dest_dir)
-            self.fetch_new(dest, url, rev_options)
-            return
-
-        # Do nothing if the response is "i".
-        if response == 's':
-            logger.info(
-                'Switching %s %s to %s%s',
-                self.repo_name,
-                display_path(dest),
-                url,
-                rev_display,
-            )
-            self.switch(dest, url, rev_options)
-
-    def unpack(self, location):
-        # type: (str) -> None
-        """
-        Clean up current location and download the url repository
-        (and vcs infos) into location
-        """
-        if os.path.exists(location):
-            rmtree(location)
-        self.obtain(location)
-
-    @classmethod
-    def get_src_requirement(cls, location, project_name):
-        """
-        Return a string representing the requirement needed to
-        redownload the files currently present in location, something
-        like:
-          {repository_url}@{revision}#egg={project_name}-{version_identifier}
-        """
-        raise NotImplementedError
-
-    @classmethod
-    def get_remote_url(cls, location):
-        """
-        Return the url used at location
-
-        Raises RemoteNotFoundError if the repository does not have a remote
-        url configured.
-        """
-        raise NotImplementedError
-
-    @classmethod
-    def get_revision(cls, location):
-        """
-        Return the current commit id of the files at the given location.
-        """
-        raise NotImplementedError
-
-    @classmethod
-    def run_command(
-        cls,
-        cmd,  # type: List[str]
-        show_stdout=True,  # type: bool
-        cwd=None,  # type: Optional[str]
-        on_returncode='raise',  # type: str
-        extra_ok_returncodes=None,  # type: Optional[Iterable[int]]
-        command_desc=None,  # type: Optional[str]
-        extra_environ=None,  # type: Optional[Mapping[str, Any]]
-        spinner=None  # type: Optional[SpinnerInterface]
-    ):
-        # type: (...) -> Optional[Text]
-        """
-        Run a VCS subcommand
-        This is simply a wrapper around call_subprocess that adds the VCS
-        command name, and checks that the VCS is available
-        """
-        cmd = [cls.name] + cmd
-        try:
-            return call_subprocess(cmd, show_stdout, cwd,
-                                   on_returncode=on_returncode,
-                                   extra_ok_returncodes=extra_ok_returncodes,
-                                   command_desc=command_desc,
-                                   extra_environ=extra_environ,
-                                   unset_environ=cls.unset_environ,
-                                   spinner=spinner)
-        except OSError as e:
-            # errno.ENOENT = no such file or directory
-            # In other words, the VCS executable isn't available
-            if e.errno == errno.ENOENT:
-                raise BadCommand(
-                    'Cannot find command %r - do you have '
-                    '%r installed and in your '
-                    'PATH?' % (cls.name, cls.name))
-            else:
-                raise  # re-raise exception if a different error occurred
-
-    @classmethod
-    def is_repository_directory(cls, path):
-        # type: (str) -> bool
-        """
-        Return whether a directory path is a repository directory.
-        """
-        logger.debug('Checking in %s for %s (%s)...',
-                     path, cls.dirname, cls.name)
-        return os.path.exists(os.path.join(path, cls.dirname))
-
-    @classmethod
-    def controls_location(cls, location):
-        # type: (str) -> bool
-        """
-        Check if a location is controlled by the vcs.
-        It is meant to be overridden to implement smarter detection
-        mechanisms for specific vcs.
-
-        This can do more than is_repository_directory() alone.  For example,
-        the Git override checks that Git is actually available.
-        """
-        return cls.is_repository_directory(location)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/vcs/bazaar.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/vcs/bazaar.py
deleted file mode 100644
index 4c6ac79..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/vcs/bazaar.py
+++ /dev/null
@@ -1,114 +0,0 @@
-from __future__ import absolute_import
-
-import logging
-import os
-
-from pip._vendor.six.moves.urllib import parse as urllib_parse
-
-from pip._internal.download import path_to_url
-from pip._internal.utils.misc import (
-    display_path, make_vcs_requirement_url, rmtree,
-)
-from pip._internal.utils.temp_dir import TempDirectory
-from pip._internal.vcs import VersionControl, vcs
-
-logger = logging.getLogger(__name__)
-
-
-class Bazaar(VersionControl):
-    name = 'bzr'
-    dirname = '.bzr'
-    repo_name = 'branch'
-    schemes = (
-        'bzr', 'bzr+http', 'bzr+https', 'bzr+ssh', 'bzr+sftp', 'bzr+ftp',
-        'bzr+lp',
-    )
-
-    def __init__(self, url=None, *args, **kwargs):
-        super(Bazaar, self).__init__(url, *args, **kwargs)
-        # This is only needed for python <2.7.5
-        # Register lp but do not expose as a scheme to support bzr+lp.
-        if getattr(urllib_parse, 'uses_fragment', None):
-            urllib_parse.uses_fragment.extend(['lp'])
-
-    def get_base_rev_args(self, rev):
-        return ['-r', rev]
-
-    def export(self, location):
-        """
-        Export the Bazaar repository at the url to the destination location
-        """
-        # Remove the location to make sure Bazaar can export it correctly
-        if os.path.exists(location):
-            rmtree(location)
-
-        with TempDirectory(kind="export") as temp_dir:
-            self.unpack(temp_dir.path)
-
-            self.run_command(
-                ['export', location],
-                cwd=temp_dir.path, show_stdout=False,
-            )
-
-    def fetch_new(self, dest, url, rev_options):
-        rev_display = rev_options.to_display()
-        logger.info(
-            'Checking out %s%s to %s',
-            url,
-            rev_display,
-            display_path(dest),
-        )
-        cmd_args = ['branch', '-q'] + rev_options.to_args() + [url, dest]
-        self.run_command(cmd_args)
-
-    def switch(self, dest, url, rev_options):
-        self.run_command(['switch', url], cwd=dest)
-
-    def update(self, dest, url, rev_options):
-        cmd_args = ['pull', '-q'] + rev_options.to_args()
-        self.run_command(cmd_args, cwd=dest)
-
-    def get_url_rev_and_auth(self, url):
-        # hotfix the URL scheme after removing bzr+ from bzr+ssh:// readd it
-        url, rev, user_pass = super(Bazaar, self).get_url_rev_and_auth(url)
-        if url.startswith('ssh://'):
-            url = 'bzr+' + url
-        return url, rev, user_pass
-
-    @classmethod
-    def get_remote_url(cls, location):
-        urls = cls.run_command(['info'], show_stdout=False, cwd=location)
-        for line in urls.splitlines():
-            line = line.strip()
-            for x in ('checkout of branch: ',
-                      'parent branch: '):
-                if line.startswith(x):
-                    repo = line.split(x)[1]
-                    if cls._is_local_repository(repo):
-                        return path_to_url(repo)
-                    return repo
-        return None
-
-    @classmethod
-    def get_revision(cls, location):
-        revision = cls.run_command(
-            ['revno'], show_stdout=False, cwd=location,
-        )
-        return revision.splitlines()[-1]
-
-    @classmethod
-    def get_src_requirement(cls, location, project_name):
-        repo = cls.get_remote_url(location)
-        if not repo:
-            return None
-        if not repo.lower().startswith('bzr:'):
-            repo = 'bzr+' + repo
-        current_rev = cls.get_revision(location)
-        return make_vcs_requirement_url(repo, current_rev, project_name)
-
-    def is_commit_id_equal(self, dest, name):
-        """Always assume the versions don't match"""
-        return False
-
-
-vcs.register(Bazaar)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/vcs/git.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/vcs/git.py
deleted file mode 100644
index dd2bd61..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/vcs/git.py
+++ /dev/null
@@ -1,369 +0,0 @@
-from __future__ import absolute_import
-
-import logging
-import os.path
-import re
-
-from pip._vendor.packaging.version import parse as parse_version
-from pip._vendor.six.moves.urllib import parse as urllib_parse
-from pip._vendor.six.moves.urllib import request as urllib_request
-
-from pip._internal.exceptions import BadCommand
-from pip._internal.utils.compat import samefile
-from pip._internal.utils.misc import (
-    display_path, make_vcs_requirement_url, redact_password_from_url,
-)
-from pip._internal.utils.temp_dir import TempDirectory
-from pip._internal.vcs import RemoteNotFoundError, VersionControl, vcs
-
-urlsplit = urllib_parse.urlsplit
-urlunsplit = urllib_parse.urlunsplit
-
-
-logger = logging.getLogger(__name__)
-
-
-HASH_REGEX = re.compile('[a-fA-F0-9]{40}')
-
-
-def looks_like_hash(sha):
-    return bool(HASH_REGEX.match(sha))
-
-
-class Git(VersionControl):
-    name = 'git'
-    dirname = '.git'
-    repo_name = 'clone'
-    schemes = (
-        'git', 'git+http', 'git+https', 'git+ssh', 'git+git', 'git+file',
-    )
-    # Prevent the user's environment variables from interfering with pip:
-    # https://github.com/pypa/pip/issues/1130
-    unset_environ = ('GIT_DIR', 'GIT_WORK_TREE')
-    default_arg_rev = 'HEAD'
-
-    def __init__(self, url=None, *args, **kwargs):
-
-        # Works around an apparent Git bug
-        # (see https://article.gmane.org/gmane.comp.version-control.git/146500)
-        if url:
-            scheme, netloc, path, query, fragment = urlsplit(url)
-            if scheme.endswith('file'):
-                initial_slashes = path[:-len(path.lstrip('/'))]
-                newpath = (
-                    initial_slashes +
-                    urllib_request.url2pathname(path)
-                    .replace('\\', '/').lstrip('/')
-                )
-                url = urlunsplit((scheme, netloc, newpath, query, fragment))
-                after_plus = scheme.find('+') + 1
-                url = scheme[:after_plus] + urlunsplit(
-                    (scheme[after_plus:], netloc, newpath, query, fragment),
-                )
-
-        super(Git, self).__init__(url, *args, **kwargs)
-
-    def get_base_rev_args(self, rev):
-        return [rev]
-
-    def get_git_version(self):
-        VERSION_PFX = 'git version '
-        version = self.run_command(['version'], show_stdout=False)
-        if version.startswith(VERSION_PFX):
-            version = version[len(VERSION_PFX):].split()[0]
-        else:
-            version = ''
-        # get first 3 positions of the git version becasue
-        # on windows it is x.y.z.windows.t, and this parses as
-        # LegacyVersion which always smaller than a Version.
-        version = '.'.join(version.split('.')[:3])
-        return parse_version(version)
-
-    def get_current_branch(self, location):
-        """
-        Return the current branch, or None if HEAD isn't at a branch
-        (e.g. detached HEAD).
-        """
-        # git-symbolic-ref exits with empty stdout if "HEAD" is a detached
-        # HEAD rather than a symbolic ref.  In addition, the -q causes the
-        # command to exit with status code 1 instead of 128 in this case
-        # and to suppress the message to stderr.
-        args = ['symbolic-ref', '-q', 'HEAD']
-        output = self.run_command(
-            args, extra_ok_returncodes=(1, ), show_stdout=False, cwd=location,
-        )
-        ref = output.strip()
-
-        if ref.startswith('refs/heads/'):
-            return ref[len('refs/heads/'):]
-
-        return None
-
-    def export(self, location):
-        """Export the Git repository at the url to the destination location"""
-        if not location.endswith('/'):
-            location = location + '/'
-
-        with TempDirectory(kind="export") as temp_dir:
-            self.unpack(temp_dir.path)
-            self.run_command(
-                ['checkout-index', '-a', '-f', '--prefix', location],
-                show_stdout=False, cwd=temp_dir.path
-            )
-
-    def get_revision_sha(self, dest, rev):
-        """
-        Return (sha_or_none, is_branch), where sha_or_none is a commit hash
-        if the revision names a remote branch or tag, otherwise None.
-
-        Args:
-          dest: the repository directory.
-          rev: the revision name.
-        """
-        # Pass rev to pre-filter the list.
-        output = self.run_command(['show-ref', rev], cwd=dest,
-                                  show_stdout=False, on_returncode='ignore')
-        refs = {}
-        for line in output.strip().splitlines():
-            try:
-                sha, ref = line.split()
-            except ValueError:
-                # Include the offending line to simplify troubleshooting if
-                # this error ever occurs.
-                raise ValueError('unexpected show-ref line: {!r}'.format(line))
-
-            refs[ref] = sha
-
-        branch_ref = 'refs/remotes/origin/{}'.format(rev)
-        tag_ref = 'refs/tags/{}'.format(rev)
-
-        sha = refs.get(branch_ref)
-        if sha is not None:
-            return (sha, True)
-
-        sha = refs.get(tag_ref)
-
-        return (sha, False)
-
-    def resolve_revision(self, dest, url, rev_options):
-        """
-        Resolve a revision to a new RevOptions object with the SHA1 of the
-        branch, tag, or ref if found.
-
-        Args:
-          rev_options: a RevOptions object.
-        """
-        rev = rev_options.arg_rev
-        sha, is_branch = self.get_revision_sha(dest, rev)
-
-        if sha is not None:
-            rev_options = rev_options.make_new(sha)
-            rev_options.branch_name = rev if is_branch else None
-
-            return rev_options
-
-        # Do not show a warning for the common case of something that has
-        # the form of a Git commit hash.
-        if not looks_like_hash(rev):
-            logger.warning(
-                "Did not find branch or tag '%s', assuming revision or ref.",
-                rev,
-            )
-
-        if not rev.startswith('refs/'):
-            return rev_options
-
-        # If it looks like a ref, we have to fetch it explicitly.
-        self.run_command(
-            ['fetch', '-q', url] + rev_options.to_args(),
-            cwd=dest,
-        )
-        # Change the revision to the SHA of the ref we fetched
-        sha = self.get_revision(dest, rev='FETCH_HEAD')
-        rev_options = rev_options.make_new(sha)
-
-        return rev_options
-
-    def is_commit_id_equal(self, dest, name):
-        """
-        Return whether the current commit hash equals the given name.
-
-        Args:
-          dest: the repository directory.
-          name: a string name.
-        """
-        if not name:
-            # Then avoid an unnecessary subprocess call.
-            return False
-
-        return self.get_revision(dest) == name
-
-    def fetch_new(self, dest, url, rev_options):
-        rev_display = rev_options.to_display()
-        logger.info(
-            'Cloning %s%s to %s', redact_password_from_url(url),
-            rev_display, display_path(dest),
-        )
-        self.run_command(['clone', '-q', url, dest])
-
-        if rev_options.rev:
-            # Then a specific revision was requested.
-            rev_options = self.resolve_revision(dest, url, rev_options)
-            branch_name = getattr(rev_options, 'branch_name', None)
-            if branch_name is None:
-                # Only do a checkout if the current commit id doesn't match
-                # the requested revision.
-                if not self.is_commit_id_equal(dest, rev_options.rev):
-                    cmd_args = ['checkout', '-q'] + rev_options.to_args()
-                    self.run_command(cmd_args, cwd=dest)
-            elif self.get_current_branch(dest) != branch_name:
-                # Then a specific branch was requested, and that branch
-                # is not yet checked out.
-                track_branch = 'origin/{}'.format(branch_name)
-                cmd_args = [
-                    'checkout', '-b', branch_name, '--track', track_branch,
-                ]
-                self.run_command(cmd_args, cwd=dest)
-
-        #: repo may contain submodules
-        self.update_submodules(dest)
-
-    def switch(self, dest, url, rev_options):
-        self.run_command(['config', 'remote.origin.url', url], cwd=dest)
-        cmd_args = ['checkout', '-q'] + rev_options.to_args()
-        self.run_command(cmd_args, cwd=dest)
-
-        self.update_submodules(dest)
-
-    def update(self, dest, url, rev_options):
-        # First fetch changes from the default remote
-        if self.get_git_version() >= parse_version('1.9.0'):
-            # fetch tags in addition to everything else
-            self.run_command(['fetch', '-q', '--tags'], cwd=dest)
-        else:
-            self.run_command(['fetch', '-q'], cwd=dest)
-        # Then reset to wanted revision (maybe even origin/master)
-        rev_options = self.resolve_revision(dest, url, rev_options)
-        cmd_args = ['reset', '--hard', '-q'] + rev_options.to_args()
-        self.run_command(cmd_args, cwd=dest)
-        #: update submodules
-        self.update_submodules(dest)
-
-    @classmethod
-    def get_remote_url(cls, location):
-        """
-        Return URL of the first remote encountered.
-
-        Raises RemoteNotFoundError if the repository does not have a remote
-        url configured.
-        """
-        # We need to pass 1 for extra_ok_returncodes since the command
-        # exits with return code 1 if there are no matching lines.
-        stdout = cls.run_command(
-            ['config', '--get-regexp', r'remote\..*\.url'],
-            extra_ok_returncodes=(1, ), show_stdout=False, cwd=location,
-        )
-        remotes = stdout.splitlines()
-        try:
-            found_remote = remotes[0]
-        except IndexError:
-            raise RemoteNotFoundError
-
-        for remote in remotes:
-            if remote.startswith('remote.origin.url '):
-                found_remote = remote
-                break
-        url = found_remote.split(' ')[1]
-        return url.strip()
-
-    @classmethod
-    def get_revision(cls, location, rev=None):
-        if rev is None:
-            rev = 'HEAD'
-        current_rev = cls.run_command(
-            ['rev-parse', rev], show_stdout=False, cwd=location,
-        )
-        return current_rev.strip()
-
-    @classmethod
-    def _get_subdirectory(cls, location):
-        """Return the relative path of setup.py to the git repo root."""
-        # find the repo root
-        git_dir = cls.run_command(['rev-parse', '--git-dir'],
-                                  show_stdout=False, cwd=location).strip()
-        if not os.path.isabs(git_dir):
-            git_dir = os.path.join(location, git_dir)
-        root_dir = os.path.join(git_dir, '..')
-        # find setup.py
-        orig_location = location
-        while not os.path.exists(os.path.join(location, 'setup.py')):
-            last_location = location
-            location = os.path.dirname(location)
-            if location == last_location:
-                # We've traversed up to the root of the filesystem without
-                # finding setup.py
-                logger.warning(
-                    "Could not find setup.py for directory %s (tried all "
-                    "parent directories)",
-                    orig_location,
-                )
-                return None
-        # relative path of setup.py to repo root
-        if samefile(root_dir, location):
-            return None
-        return os.path.relpath(location, root_dir)
-
-    @classmethod
-    def get_src_requirement(cls, location, project_name):
-        repo = cls.get_remote_url(location)
-        if not repo.lower().startswith('git:'):
-            repo = 'git+' + repo
-        current_rev = cls.get_revision(location)
-        subdir = cls._get_subdirectory(location)
-        req = make_vcs_requirement_url(repo, current_rev, project_name,
-                                       subdir=subdir)
-
-        return req
-
-    def get_url_rev_and_auth(self, url):
-        """
-        Prefixes stub URLs like 'user@hostname:user/repo.git' with 'ssh://'.
-        That's required because although they use SSH they sometimes don't
-        work with a ssh:// scheme (e.g. GitHub). But we need a scheme for
-        parsing. Hence we remove it again afterwards and return it as a stub.
-        """
-        if '://' not in url:
-            assert 'file:' not in url
-            url = url.replace('git+', 'git+ssh://')
-            url, rev, user_pass = super(Git, self).get_url_rev_and_auth(url)
-            url = url.replace('ssh://', '')
-        else:
-            url, rev, user_pass = super(Git, self).get_url_rev_and_auth(url)
-
-        return url, rev, user_pass
-
-    def update_submodules(self, location):
-        if not os.path.exists(os.path.join(location, '.gitmodules')):
-            return
-        self.run_command(
-            ['submodule', 'update', '--init', '--recursive', '-q'],
-            cwd=location,
-        )
-
-    @classmethod
-    def controls_location(cls, location):
-        if super(Git, cls).controls_location(location):
-            return True
-        try:
-            r = cls.run_command(['rev-parse'],
-                                cwd=location,
-                                show_stdout=False,
-                                on_returncode='ignore')
-            return not r
-        except BadCommand:
-            logger.debug("could not determine if %s is under git control "
-                         "because git is not available", location)
-            return False
-
-
-vcs.register(Git)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/vcs/mercurial.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/vcs/mercurial.py
deleted file mode 100644
index 26e75de..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/vcs/mercurial.py
+++ /dev/null
@@ -1,103 +0,0 @@
-from __future__ import absolute_import
-
-import logging
-import os
-
-from pip._vendor.six.moves import configparser
-
-from pip._internal.download import path_to_url
-from pip._internal.utils.misc import display_path, make_vcs_requirement_url
-from pip._internal.utils.temp_dir import TempDirectory
-from pip._internal.vcs import VersionControl, vcs
-
-logger = logging.getLogger(__name__)
-
-
-class Mercurial(VersionControl):
-    name = 'hg'
-    dirname = '.hg'
-    repo_name = 'clone'
-    schemes = ('hg', 'hg+http', 'hg+https', 'hg+ssh', 'hg+static-http')
-
-    def get_base_rev_args(self, rev):
-        return [rev]
-
-    def export(self, location):
-        """Export the Hg repository at the url to the destination location"""
-        with TempDirectory(kind="export") as temp_dir:
-            self.unpack(temp_dir.path)
-
-            self.run_command(
-                ['archive', location], show_stdout=False, cwd=temp_dir.path
-            )
-
-    def fetch_new(self, dest, url, rev_options):
-        rev_display = rev_options.to_display()
-        logger.info(
-            'Cloning hg %s%s to %s',
-            url,
-            rev_display,
-            display_path(dest),
-        )
-        self.run_command(['clone', '--noupdate', '-q', url, dest])
-        cmd_args = ['update', '-q'] + rev_options.to_args()
-        self.run_command(cmd_args, cwd=dest)
-
-    def switch(self, dest, url, rev_options):
-        repo_config = os.path.join(dest, self.dirname, 'hgrc')
-        config = configparser.SafeConfigParser()
-        try:
-            config.read(repo_config)
-            config.set('paths', 'default', url)
-            with open(repo_config, 'w') as config_file:
-                config.write(config_file)
-        except (OSError, configparser.NoSectionError) as exc:
-            logger.warning(
-                'Could not switch Mercurial repository to %s: %s', url, exc,
-            )
-        else:
-            cmd_args = ['update', '-q'] + rev_options.to_args()
-            self.run_command(cmd_args, cwd=dest)
-
-    def update(self, dest, url, rev_options):
-        self.run_command(['pull', '-q'], cwd=dest)
-        cmd_args = ['update', '-q'] + rev_options.to_args()
-        self.run_command(cmd_args, cwd=dest)
-
-    @classmethod
-    def get_remote_url(cls, location):
-        url = cls.run_command(
-            ['showconfig', 'paths.default'],
-            show_stdout=False, cwd=location).strip()
-        if cls._is_local_repository(url):
-            url = path_to_url(url)
-        return url.strip()
-
-    @classmethod
-    def get_revision(cls, location):
-        current_revision = cls.run_command(
-            ['parents', '--template={rev}'],
-            show_stdout=False, cwd=location).strip()
-        return current_revision
-
-    @classmethod
-    def get_revision_hash(cls, location):
-        current_rev_hash = cls.run_command(
-            ['parents', '--template={node}'],
-            show_stdout=False, cwd=location).strip()
-        return current_rev_hash
-
-    @classmethod
-    def get_src_requirement(cls, location, project_name):
-        repo = cls.get_remote_url(location)
-        if not repo.lower().startswith('hg:'):
-            repo = 'hg+' + repo
-        current_rev_hash = cls.get_revision_hash(location)
-        return make_vcs_requirement_url(repo, current_rev_hash, project_name)
-
-    def is_commit_id_equal(self, dest, name):
-        """Always assume the versions don't match"""
-        return False
-
-
-vcs.register(Mercurial)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/vcs/subversion.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/vcs/subversion.py
deleted file mode 100644
index 42ac5ac..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/vcs/subversion.py
+++ /dev/null
@@ -1,200 +0,0 @@
-from __future__ import absolute_import
-
-import logging
-import os
-import re
-
-from pip._internal.utils.logging import indent_log
-from pip._internal.utils.misc import (
-    display_path, make_vcs_requirement_url, rmtree, split_auth_from_netloc,
-)
-from pip._internal.vcs import VersionControl, vcs
-
-_svn_xml_url_re = re.compile('url="([^"]+)"')
-_svn_rev_re = re.compile(r'committed-rev="(\d+)"')
-_svn_info_xml_rev_re = re.compile(r'\s*revision="(\d+)"')
-_svn_info_xml_url_re = re.compile(r'<url>(.*)</url>')
-
-
-logger = logging.getLogger(__name__)
-
-
-class Subversion(VersionControl):
-    name = 'svn'
-    dirname = '.svn'
-    repo_name = 'checkout'
-    schemes = ('svn', 'svn+ssh', 'svn+http', 'svn+https', 'svn+svn')
-
-    def get_base_rev_args(self, rev):
-        return ['-r', rev]
-
-    def export(self, location):
-        """Export the svn repository at the url to the destination location"""
-        url, rev_options = self.get_url_rev_options(self.url)
-
-        logger.info('Exporting svn repository %s to %s', url, location)
-        with indent_log():
-            if os.path.exists(location):
-                # Subversion doesn't like to check out over an existing
-                # directory --force fixes this, but was only added in svn 1.5
-                rmtree(location)
-            cmd_args = ['export'] + rev_options.to_args() + [url, location]
-            self.run_command(cmd_args, show_stdout=False)
-
-    def fetch_new(self, dest, url, rev_options):
-        rev_display = rev_options.to_display()
-        logger.info(
-            'Checking out %s%s to %s',
-            url,
-            rev_display,
-            display_path(dest),
-        )
-        cmd_args = ['checkout', '-q'] + rev_options.to_args() + [url, dest]
-        self.run_command(cmd_args)
-
-    def switch(self, dest, url, rev_options):
-        cmd_args = ['switch'] + rev_options.to_args() + [url, dest]
-        self.run_command(cmd_args)
-
-    def update(self, dest, url, rev_options):
-        cmd_args = ['update'] + rev_options.to_args() + [dest]
-        self.run_command(cmd_args)
-
-    @classmethod
-    def get_revision(cls, location):
-        """
-        Return the maximum revision for all files under a given location
-        """
-        # Note: taken from setuptools.command.egg_info
-        revision = 0
-
-        for base, dirs, files in os.walk(location):
-            if cls.dirname not in dirs:
-                dirs[:] = []
-                continue    # no sense walking uncontrolled subdirs
-            dirs.remove(cls.dirname)
-            entries_fn = os.path.join(base, cls.dirname, 'entries')
-            if not os.path.exists(entries_fn):
-                # FIXME: should we warn?
-                continue
-
-            dirurl, localrev = cls._get_svn_url_rev(base)
-
-            if base == location:
-                base = dirurl + '/'   # save the root url
-            elif not dirurl or not dirurl.startswith(base):
-                dirs[:] = []
-                continue    # not part of the same svn tree, skip it
-            revision = max(revision, localrev)
-        return revision
-
-    def get_netloc_and_auth(self, netloc, scheme):
-        """
-        This override allows the auth information to be passed to svn via the
-        --username and --password options instead of via the URL.
-        """
-        if scheme == 'ssh':
-            # The --username and --password options can't be used for
-            # svn+ssh URLs, so keep the auth information in the URL.
-            return super(Subversion, self).get_netloc_and_auth(
-                netloc, scheme)
-
-        return split_auth_from_netloc(netloc)
-
-    def get_url_rev_and_auth(self, url):
-        # hotfix the URL scheme after removing svn+ from svn+ssh:// readd it
-        url, rev, user_pass = super(Subversion, self).get_url_rev_and_auth(url)
-        if url.startswith('ssh://'):
-            url = 'svn+' + url
-        return url, rev, user_pass
-
-    def make_rev_args(self, username, password):
-        extra_args = []
-        if username:
-            extra_args += ['--username', username]
-        if password:
-            extra_args += ['--password', password]
-
-        return extra_args
-
-    @classmethod
-    def get_remote_url(cls, location):
-        # In cases where the source is in a subdirectory, not alongside
-        # setup.py we have to look up in the location until we find a real
-        # setup.py
-        orig_location = location
-        while not os.path.exists(os.path.join(location, 'setup.py')):
-            last_location = location
-            location = os.path.dirname(location)
-            if location == last_location:
-                # We've traversed up to the root of the filesystem without
-                # finding setup.py
-                logger.warning(
-                    "Could not find setup.py for directory %s (tried all "
-                    "parent directories)",
-                    orig_location,
-                )
-                return None
-
-        return cls._get_svn_url_rev(location)[0]
-
-    @classmethod
-    def _get_svn_url_rev(cls, location):
-        from pip._internal.exceptions import InstallationError
-
-        entries_path = os.path.join(location, cls.dirname, 'entries')
-        if os.path.exists(entries_path):
-            with open(entries_path) as f:
-                data = f.read()
-        else:  # subversion >= 1.7 does not have the 'entries' file
-            data = ''
-
-        if (data.startswith('8') or
-                data.startswith('9') or
-                data.startswith('10')):
-            data = list(map(str.splitlines, data.split('\n\x0c\n')))
-            del data[0][0]  # get rid of the '8'
-            url = data[0][3]
-            revs = [int(d[9]) for d in data if len(d) > 9 and d[9]] + [0]
-        elif data.startswith('<?xml'):
-            match = _svn_xml_url_re.search(data)
-            if not match:
-                raise ValueError('Badly formatted data: %r' % data)
-            url = match.group(1)    # get repository URL
-            revs = [int(m.group(1)) for m in _svn_rev_re.finditer(data)] + [0]
-        else:
-            try:
-                # subversion >= 1.7
-                xml = cls.run_command(
-                    ['info', '--xml', location],
-                    show_stdout=False,
-                )
-                url = _svn_info_xml_url_re.search(xml).group(1)
-                revs = [
-                    int(m.group(1)) for m in _svn_info_xml_rev_re.finditer(xml)
-                ]
-            except InstallationError:
-                url, revs = None, []
-
-        if revs:
-            rev = max(revs)
-        else:
-            rev = 0
-
-        return url, rev
-
-    @classmethod
-    def get_src_requirement(cls, location, project_name):
-        repo = cls.get_remote_url(location)
-        if repo is None:
-            return None
-        repo = 'svn+' + repo
-        rev = cls.get_revision(location)
-        return make_vcs_requirement_url(repo, rev, project_name)
-
-    def is_commit_id_equal(self, dest, name):
-        """Always assume the versions don't match"""
-        return False
-
-
-vcs.register(Subversion)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/wheel.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/wheel.py
deleted file mode 100644
index 67bcc7f..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/wheel.py
+++ /dev/null
@@ -1,1095 +0,0 @@
-"""
-Support for installing and building the "wheel" binary package format.
-"""
-from __future__ import absolute_import
-
-import collections
-import compileall
-import csv
-import hashlib
-import logging
-import os.path
-import re
-import shutil
-import stat
-import sys
-import warnings
-from base64 import urlsafe_b64encode
-from email.parser import Parser
-
-from pip._vendor import pkg_resources
-from pip._vendor.distlib.scripts import ScriptMaker
-from pip._vendor.packaging.utils import canonicalize_name
-from pip._vendor.six import StringIO
-
-from pip._internal import pep425tags
-from pip._internal.download import path_to_url, unpack_url
-from pip._internal.exceptions import (
-    InstallationError, InvalidWheelFilename, UnsupportedWheel,
-)
-from pip._internal.locations import (
-    PIP_DELETE_MARKER_FILENAME, distutils_scheme,
-)
-from pip._internal.models.link import Link
-from pip._internal.utils.logging import indent_log
-from pip._internal.utils.misc import (
-    call_subprocess, captured_stdout, ensure_dir, read_chunks,
-)
-from pip._internal.utils.setuptools_build import SETUPTOOLS_SHIM
-from pip._internal.utils.temp_dir import TempDirectory
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-from pip._internal.utils.ui import open_spinner
-
-if MYPY_CHECK_RUNNING:
-    from typing import (  # noqa: F401
-        Dict, List, Optional, Sequence, Mapping, Tuple, IO, Text, Any,
-        Union, Iterable
-    )
-    from pip._vendor.packaging.requirements import Requirement  # noqa: F401
-    from pip._internal.req.req_install import InstallRequirement  # noqa: F401
-    from pip._internal.download import PipSession  # noqa: F401
-    from pip._internal.index import FormatControl, PackageFinder  # noqa: F401
-    from pip._internal.operations.prepare import (  # noqa: F401
-        RequirementPreparer
-    )
-    from pip._internal.cache import WheelCache  # noqa: F401
-    from pip._internal.pep425tags import Pep425Tag  # noqa: F401
-
-    InstalledCSVRow = Tuple[str, ...]
-
-
-VERSION_COMPATIBLE = (1, 0)
-
-
-logger = logging.getLogger(__name__)
-
-
-def normpath(src, p):
-    return os.path.relpath(src, p).replace(os.path.sep, '/')
-
-
-def rehash(path, blocksize=1 << 20):
-    # type: (str, int) -> Tuple[str, str]
-    """Return (hash, length) for path using hashlib.sha256()"""
-    h = hashlib.sha256()
-    length = 0
-    with open(path, 'rb') as f:
-        for block in read_chunks(f, size=blocksize):
-            length += len(block)
-            h.update(block)
-    digest = 'sha256=' + urlsafe_b64encode(
-        h.digest()
-    ).decode('latin1').rstrip('=')
-    # unicode/str python2 issues
-    return (digest, str(length))  # type: ignore
-
-
-def open_for_csv(name, mode):
-    # type: (str, Text) -> IO
-    if sys.version_info[0] < 3:
-        nl = {}  # type: Dict[str, Any]
-        bin = 'b'
-    else:
-        nl = {'newline': ''}  # type: Dict[str, Any]
-        bin = ''
-    return open(name, mode + bin, **nl)
-
-
-def replace_python_tag(wheelname, new_tag):
-    # type: (str, str) -> str
-    """Replace the Python tag in a wheel file name with a new value.
-    """
-    parts = wheelname.split('-')
-    parts[-3] = new_tag
-    return '-'.join(parts)
-
-
-def fix_script(path):
-    # type: (str) -> Optional[bool]
-    """Replace #!python with #!/path/to/python
-    Return True if file was changed."""
-    # XXX RECORD hashes will need to be updated
-    if os.path.isfile(path):
-        with open(path, 'rb') as script:
-            firstline = script.readline()
-            if not firstline.startswith(b'#!python'):
-                return False
-            exename = sys.executable.encode(sys.getfilesystemencoding())
-            firstline = b'#!' + exename + os.linesep.encode("ascii")
-            rest = script.read()
-        with open(path, 'wb') as script:
-            script.write(firstline)
-            script.write(rest)
-        return True
-    return None
-
-
-dist_info_re = re.compile(r"""^(?P<namever>(?P<name>.+?)(-(?P<ver>.+?))?)
-                                \.dist-info$""", re.VERBOSE)
-
-
-def root_is_purelib(name, wheeldir):
-    # type: (str, str) -> bool
-    """
-    Return True if the extracted wheel in wheeldir should go into purelib.
-    """
-    name_folded = name.replace("-", "_")
-    for item in os.listdir(wheeldir):
-        match = dist_info_re.match(item)
-        if match and match.group('name') == name_folded:
-            with open(os.path.join(wheeldir, item, 'WHEEL')) as wheel:
-                for line in wheel:
-                    line = line.lower().rstrip()
-                    if line == "root-is-purelib: true":
-                        return True
-    return False
-
-
-def get_entrypoints(filename):
-    # type: (str) -> Tuple[Dict[str, str], Dict[str, str]]
-    if not os.path.exists(filename):
-        return {}, {}
-
-    # This is done because you can pass a string to entry_points wrappers which
-    # means that they may or may not be valid INI files. The attempt here is to
-    # strip leading and trailing whitespace in order to make them valid INI
-    # files.
-    with open(filename) as fp:
-        data = StringIO()
-        for line in fp:
-            data.write(line.strip())
-            data.write("\n")
-        data.seek(0)
-
-    # get the entry points and then the script names
-    entry_points = pkg_resources.EntryPoint.parse_map(data)
-    console = entry_points.get('console_scripts', {})
-    gui = entry_points.get('gui_scripts', {})
-
-    def _split_ep(s):
-        """get the string representation of EntryPoint, remove space and split
-        on '='"""
-        return str(s).replace(" ", "").split("=")
-
-    # convert the EntryPoint objects into strings with module:function
-    console = dict(_split_ep(v) for v in console.values())
-    gui = dict(_split_ep(v) for v in gui.values())
-    return console, gui
-
-
-def message_about_scripts_not_on_PATH(scripts):
-    # type: (Sequence[str]) -> Optional[str]
-    """Determine if any scripts are not on PATH and format a warning.
-
-    Returns a warning message if one or more scripts are not on PATH,
-    otherwise None.
-    """
-    if not scripts:
-        return None
-
-    # Group scripts by the path they were installed in
-    grouped_by_dir = collections.defaultdict(set)  # type: Dict[str, set]
-    for destfile in scripts:
-        parent_dir = os.path.dirname(destfile)
-        script_name = os.path.basename(destfile)
-        grouped_by_dir[parent_dir].add(script_name)
-
-    # We don't want to warn for directories that are on PATH.
-    not_warn_dirs = [
-        os.path.normcase(i).rstrip(os.sep) for i in
-        os.environ.get("PATH", "").split(os.pathsep)
-    ]
-    # If an executable sits with sys.executable, we don't warn for it.
-    #     This covers the case of venv invocations without activating the venv.
-    not_warn_dirs.append(os.path.normcase(os.path.dirname(sys.executable)))
-    warn_for = {
-        parent_dir: scripts for parent_dir, scripts in grouped_by_dir.items()
-        if os.path.normcase(parent_dir) not in not_warn_dirs
-    }
-    if not warn_for:
-        return None
-
-    # Format a message
-    msg_lines = []
-    for parent_dir, scripts in warn_for.items():
-        scripts = sorted(scripts)
-        if len(scripts) == 1:
-            start_text = "script {} is".format(scripts[0])
-        else:
-            start_text = "scripts {} are".format(
-                ", ".join(scripts[:-1]) + " and " + scripts[-1]
-            )
-
-        msg_lines.append(
-            "The {} installed in '{}' which is not on PATH."
-            .format(start_text, parent_dir)
-        )
-
-    last_line_fmt = (
-        "Consider adding {} to PATH or, if you prefer "
-        "to suppress this warning, use --no-warn-script-location."
-    )
-    if len(msg_lines) == 1:
-        msg_lines.append(last_line_fmt.format("this directory"))
-    else:
-        msg_lines.append(last_line_fmt.format("these directories"))
-
-    # Returns the formatted multiline message
-    return "\n".join(msg_lines)
-
-
-def sorted_outrows(outrows):
-    # type: (Iterable[InstalledCSVRow]) -> List[InstalledCSVRow]
-    """
-    Return the given rows of a RECORD file in sorted order.
-
-    Each row is a 3-tuple (path, hash, size) and corresponds to a record of
-    a RECORD file (see PEP 376 and PEP 427 for details).  For the rows
-    passed to this function, the size can be an integer as an int or string,
-    or the empty string.
-    """
-    # Normally, there should only be one row per path, in which case the
-    # second and third elements don't come into play when sorting.
-    # However, in cases in the wild where a path might happen to occur twice,
-    # we don't want the sort operation to trigger an error (but still want
-    # determinism).  Since the third element can be an int or string, we
-    # coerce each element to a string to avoid a TypeError in this case.
-    # For additional background, see--
-    # https://github.com/pypa/pip/issues/5868
-    return sorted(outrows, key=lambda row: tuple(str(x) for x in row))
-
-
-def get_csv_rows_for_installed(
-    old_csv_rows,  # type: Iterable[List[str]]
-    installed,  # type: Dict[str, str]
-    changed,  # type: set
-    generated,  # type: List[str]
-    lib_dir,  # type: str
-):
-    # type: (...) -> List[InstalledCSVRow]
-    """
-    :param installed: A map from archive RECORD path to installation RECORD
-        path.
-    """
-    installed_rows = []  # type: List[InstalledCSVRow]
-    for row in old_csv_rows:
-        if len(row) > 3:
-            logger.warning(
-                'RECORD line has more than three elements: {}'.format(row)
-            )
-        # Make a copy because we are mutating the row.
-        row = list(row)
-        old_path = row[0]
-        new_path = installed.pop(old_path, old_path)
-        row[0] = new_path
-        if new_path in changed:
-            digest, length = rehash(new_path)
-            row[1] = digest
-            row[2] = length
-        installed_rows.append(tuple(row))
-    for f in generated:
-        digest, length = rehash(f)
-        installed_rows.append((normpath(f, lib_dir), digest, str(length)))
-    for f in installed:
-        installed_rows.append((installed[f], '', ''))
-    return installed_rows
-
-
-def move_wheel_files(
-    name,  # type: str
-    req,  # type: Requirement
-    wheeldir,  # type: str
-    user=False,  # type: bool
-    home=None,  # type: Optional[str]
-    root=None,  # type: Optional[str]
-    pycompile=True,  # type: bool
-    scheme=None,  # type: Optional[Mapping[str, str]]
-    isolated=False,  # type: bool
-    prefix=None,  # type: Optional[str]
-    warn_script_location=True  # type: bool
-):
-    # type: (...) -> None
-    """Install a wheel"""
-    # TODO: Investigate and break this up.
-    # TODO: Look into moving this into a dedicated class for representing an
-    #       installation.
-
-    if not scheme:
-        scheme = distutils_scheme(
-            name, user=user, home=home, root=root, isolated=isolated,
-            prefix=prefix,
-        )
-
-    if root_is_purelib(name, wheeldir):
-        lib_dir = scheme['purelib']
-    else:
-        lib_dir = scheme['platlib']
-
-    info_dir = []  # type: List[str]
-    data_dirs = []
-    source = wheeldir.rstrip(os.path.sep) + os.path.sep
-
-    # Record details of the files moved
-    #   installed = files copied from the wheel to the destination
-    #   changed = files changed while installing (scripts #! line typically)
-    #   generated = files newly generated during the install (script wrappers)
-    installed = {}  # type: Dict[str, str]
-    changed = set()
-    generated = []  # type: List[str]
-
-    # Compile all of the pyc files that we're going to be installing
-    if pycompile:
-        with captured_stdout() as stdout:
-            with warnings.catch_warnings():
-                warnings.filterwarnings('ignore')
-                compileall.compile_dir(source, force=True, quiet=True)
-        logger.debug(stdout.getvalue())
-
-    def record_installed(srcfile, destfile, modified=False):
-        """Map archive RECORD paths to installation RECORD paths."""
-        oldpath = normpath(srcfile, wheeldir)
-        newpath = normpath(destfile, lib_dir)
-        installed[oldpath] = newpath
-        if modified:
-            changed.add(destfile)
-
-    def clobber(source, dest, is_base, fixer=None, filter=None):
-        ensure_dir(dest)  # common for the 'include' path
-
-        for dir, subdirs, files in os.walk(source):
-            basedir = dir[len(source):].lstrip(os.path.sep)
-            destdir = os.path.join(dest, basedir)
-            if is_base and basedir.split(os.path.sep, 1)[0].endswith('.data'):
-                continue
-            for s in subdirs:
-                destsubdir = os.path.join(dest, basedir, s)
-                if is_base and basedir == '' and destsubdir.endswith('.data'):
-                    data_dirs.append(s)
-                    continue
-                elif (is_base and
-                        s.endswith('.dist-info') and
-                        canonicalize_name(s).startswith(
-                            canonicalize_name(req.name))):
-                    assert not info_dir, ('Multiple .dist-info directories: ' +
-                                          destsubdir + ', ' +
-                                          ', '.join(info_dir))
-                    info_dir.append(destsubdir)
-            for f in files:
-                # Skip unwanted files
-                if filter and filter(f):
-                    continue
-                srcfile = os.path.join(dir, f)
-                destfile = os.path.join(dest, basedir, f)
-                # directory creation is lazy and after the file filtering above
-                # to ensure we don't install empty dirs; empty dirs can't be
-                # uninstalled.
-                ensure_dir(destdir)
-
-                # copyfile (called below) truncates the destination if it
-                # exists and then writes the new contents. This is fine in most
-                # cases, but can cause a segfault if pip has loaded a shared
-                # object (e.g. from pyopenssl through its vendored urllib3)
-                # Since the shared object is mmap'd an attempt to call a
-                # symbol in it will then cause a segfault. Unlinking the file
-                # allows writing of new contents while allowing the process to
-                # continue to use the old copy.
-                if os.path.exists(destfile):
-                    os.unlink(destfile)
-
-                # We use copyfile (not move, copy, or copy2) to be extra sure
-                # that we are not moving directories over (copyfile fails for
-                # directories) as well as to ensure that we are not copying
-                # over any metadata because we want more control over what
-                # metadata we actually copy over.
-                shutil.copyfile(srcfile, destfile)
-
-                # Copy over the metadata for the file, currently this only
-                # includes the atime and mtime.
-                st = os.stat(srcfile)
-                if hasattr(os, "utime"):
-                    os.utime(destfile, (st.st_atime, st.st_mtime))
-
-                # If our file is executable, then make our destination file
-                # executable.
-                if os.access(srcfile, os.X_OK):
-                    st = os.stat(srcfile)
-                    permissions = (
-                        st.st_mode | stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH
-                    )
-                    os.chmod(destfile, permissions)
-
-                changed = False
-                if fixer:
-                    changed = fixer(destfile)
-                record_installed(srcfile, destfile, changed)
-
-    clobber(source, lib_dir, True)
-
-    assert info_dir, "%s .dist-info directory not found" % req
-
-    # Get the defined entry points
-    ep_file = os.path.join(info_dir[0], 'entry_points.txt')
-    console, gui = get_entrypoints(ep_file)
-
-    def is_entrypoint_wrapper(name):
-        # EP, EP.exe and EP-script.py are scripts generated for
-        # entry point EP by setuptools
-        if name.lower().endswith('.exe'):
-            matchname = name[:-4]
-        elif name.lower().endswith('-script.py'):
-            matchname = name[:-10]
-        elif name.lower().endswith(".pya"):
-            matchname = name[:-4]
-        else:
-            matchname = name
-        # Ignore setuptools-generated scripts
-        return (matchname in console or matchname in gui)
-
-    for datadir in data_dirs:
-        fixer = None
-        filter = None
-        for subdir in os.listdir(os.path.join(wheeldir, datadir)):
-            fixer = None
-            if subdir == 'scripts':
-                fixer = fix_script
-                filter = is_entrypoint_wrapper
-            source = os.path.join(wheeldir, datadir, subdir)
-            dest = scheme[subdir]
-            clobber(source, dest, False, fixer=fixer, filter=filter)
-
-    maker = ScriptMaker(None, scheme['scripts'])
-
-    # Ensure old scripts are overwritten.
-    # See https://github.com/pypa/pip/issues/1800
-    maker.clobber = True
-
-    # Ensure we don't generate any variants for scripts because this is almost
-    # never what somebody wants.
-    # See https://bitbucket.org/pypa/distlib/issue/35/
-    maker.variants = {''}
-
-    # This is required because otherwise distlib creates scripts that are not
-    # executable.
-    # See https://bitbucket.org/pypa/distlib/issue/32/
-    maker.set_mode = True
-
-    # Simplify the script and fix the fact that the default script swallows
-    # every single stack trace.
-    # See https://bitbucket.org/pypa/distlib/issue/34/
-    # See https://bitbucket.org/pypa/distlib/issue/33/
-    def _get_script_text(entry):
-        if entry.suffix is None:
-            raise InstallationError(
-                "Invalid script entry point: %s for req: %s - A callable "
-                "suffix is required. Cf https://packaging.python.org/en/"
-                "latest/distributing.html#console-scripts for more "
-                "information." % (entry, req)
-            )
-        return maker.script_template % {
-            "module": entry.prefix,
-            "import_name": entry.suffix.split(".")[0],
-            "func": entry.suffix,
-        }
-    # ignore type, because mypy disallows assigning to a method,
-    # see https://github.com/python/mypy/issues/2427
-    maker._get_script_text = _get_script_text  # type: ignore
-    maker.script_template = r"""# -*- coding: utf-8 -*-
-import re
-import sys
-
-from %(module)s import %(import_name)s
-
-if __name__ == '__main__':
-    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
-    sys.exit(%(func)s())
-"""
-
-    # Special case pip and setuptools to generate versioned wrappers
-    #
-    # The issue is that some projects (specifically, pip and setuptools) use
-    # code in setup.py to create "versioned" entry points - pip2.7 on Python
-    # 2.7, pip3.3 on Python 3.3, etc. But these entry points are baked into
-    # the wheel metadata at build time, and so if the wheel is installed with
-    # a *different* version of Python the entry points will be wrong. The
-    # correct fix for this is to enhance the metadata to be able to describe
-    # such versioned entry points, but that won't happen till Metadata 2.0 is
-    # available.
-    # In the meantime, projects using versioned entry points will either have
-    # incorrect versioned entry points, or they will not be able to distribute
-    # "universal" wheels (i.e., they will need a wheel per Python version).
-    #
-    # Because setuptools and pip are bundled with _ensurepip and virtualenv,
-    # we need to use universal wheels. So, as a stopgap until Metadata 2.0, we
-    # override the versioned entry points in the wheel and generate the
-    # correct ones. This code is purely a short-term measure until Metadata 2.0
-    # is available.
-    #
-    # To add the level of hack in this section of code, in order to support
-    # ensurepip this code will look for an ``ENSUREPIP_OPTIONS`` environment
-    # variable which will control which version scripts get installed.
-    #
-    # ENSUREPIP_OPTIONS=altinstall
-    #   - Only pipX.Y and easy_install-X.Y will be generated and installed
-    # ENSUREPIP_OPTIONS=install
-    #   - pipX.Y, pipX, easy_install-X.Y will be generated and installed. Note
-    #     that this option is technically if ENSUREPIP_OPTIONS is set and is
-    #     not altinstall
-    # DEFAULT
-    #   - The default behavior is to install pip, pipX, pipX.Y, easy_install
-    #     and easy_install-X.Y.
-    pip_script = console.pop('pip', None)
-    if pip_script:
-        if "ENSUREPIP_OPTIONS" not in os.environ:
-            spec = 'pip = ' + pip_script
-            generated.extend(maker.make(spec))
-
-        if os.environ.get("ENSUREPIP_OPTIONS", "") != "altinstall":
-            spec = 'pip%s = %s' % (sys.version[:1], pip_script)
-            generated.extend(maker.make(spec))
-
-        spec = 'pip%s = %s' % (sys.version[:3], pip_script)
-        generated.extend(maker.make(spec))
-        # Delete any other versioned pip entry points
-        pip_ep = [k for k in console if re.match(r'pip(\d(\.\d)?)?$', k)]
-        for k in pip_ep:
-            del console[k]
-    easy_install_script = console.pop('easy_install', None)
-    if easy_install_script:
-        if "ENSUREPIP_OPTIONS" not in os.environ:
-            spec = 'easy_install = ' + easy_install_script
-            generated.extend(maker.make(spec))
-
-        spec = 'easy_install-%s = %s' % (sys.version[:3], easy_install_script)
-        generated.extend(maker.make(spec))
-        # Delete any other versioned easy_install entry points
-        easy_install_ep = [
-            k for k in console if re.match(r'easy_install(-\d\.\d)?$', k)
-        ]
-        for k in easy_install_ep:
-            del console[k]
-
-    # Generate the console and GUI entry points specified in the wheel
-    if len(console) > 0:
-        generated_console_scripts = maker.make_multiple(
-            ['%s = %s' % kv for kv in console.items()]
-        )
-        generated.extend(generated_console_scripts)
-
-        if warn_script_location:
-            msg = message_about_scripts_not_on_PATH(generated_console_scripts)
-            if msg is not None:
-                logger.warning(msg)
-
-    if len(gui) > 0:
-        generated.extend(
-            maker.make_multiple(
-                ['%s = %s' % kv for kv in gui.items()],
-                {'gui': True}
-            )
-        )
-
-    # Record pip as the installer
-    installer = os.path.join(info_dir[0], 'INSTALLER')
-    temp_installer = os.path.join(info_dir[0], 'INSTALLER.pip')
-    with open(temp_installer, 'wb') as installer_file:
-        installer_file.write(b'pip\n')
-    shutil.move(temp_installer, installer)
-    generated.append(installer)
-
-    # Record details of all files installed
-    record = os.path.join(info_dir[0], 'RECORD')
-    temp_record = os.path.join(info_dir[0], 'RECORD.pip')
-    with open_for_csv(record, 'r') as record_in:
-        with open_for_csv(temp_record, 'w+') as record_out:
-            reader = csv.reader(record_in)
-            outrows = get_csv_rows_for_installed(
-                reader, installed=installed, changed=changed,
-                generated=generated, lib_dir=lib_dir,
-            )
-            writer = csv.writer(record_out)
-            # Sort to simplify testing.
-            for row in sorted_outrows(outrows):
-                writer.writerow(row)
-    shutil.move(temp_record, record)
-
-
-def wheel_version(source_dir):
-    # type: (Optional[str]) -> Optional[Tuple[int, ...]]
-    """
-    Return the Wheel-Version of an extracted wheel, if possible.
-
-    Otherwise, return None if we couldn't parse / extract it.
-    """
-    try:
-        dist = [d for d in pkg_resources.find_on_path(None, source_dir)][0]
-
-        wheel_data = dist.get_metadata('WHEEL')
-        wheel_data = Parser().parsestr(wheel_data)
-
-        version = wheel_data['Wheel-Version'].strip()
-        version = tuple(map(int, version.split('.')))
-        return version
-    except Exception:
-        return None
-
-
-def check_compatibility(version, name):
-    # type: (Optional[Tuple[int, ...]], str) -> None
-    """
-    Raises errors or warns if called with an incompatible Wheel-Version.
-
-    Pip should refuse to install a Wheel-Version that's a major series
-    ahead of what it's compatible with (e.g 2.0 > 1.1); and warn when
-    installing a version only minor version ahead (e.g 1.2 > 1.1).
-
-    version: a 2-tuple representing a Wheel-Version (Major, Minor)
-    name: name of wheel or package to raise exception about
-
-    :raises UnsupportedWheel: when an incompatible Wheel-Version is given
-    """
-    if not version:
-        raise UnsupportedWheel(
-            "%s is in an unsupported or invalid wheel" % name
-        )
-    if version[0] > VERSION_COMPATIBLE[0]:
-        raise UnsupportedWheel(
-            "%s's Wheel-Version (%s) is not compatible with this version "
-            "of pip" % (name, '.'.join(map(str, version)))
-        )
-    elif version > VERSION_COMPATIBLE:
-        logger.warning(
-            'Installing from a newer Wheel-Version (%s)',
-            '.'.join(map(str, version)),
-        )
-
-
-class Wheel(object):
-    """A wheel file"""
-
-    # TODO: Maybe move the class into the models sub-package
-    # TODO: Maybe move the install code into this class
-
-    wheel_file_re = re.compile(
-        r"""^(?P<namever>(?P<name>.+?)-(?P<ver>.*?))
-        ((-(?P<build>\d[^-]*?))?-(?P<pyver>.+?)-(?P<abi>.+?)-(?P<plat>.+?)
-        \.whl|\.dist-info)$""",
-        re.VERBOSE
-    )
-
-    def __init__(self, filename):
-        # type: (str) -> None
-        """
-        :raises InvalidWheelFilename: when the filename is invalid for a wheel
-        """
-        wheel_info = self.wheel_file_re.match(filename)
-        if not wheel_info:
-            raise InvalidWheelFilename(
-                "%s is not a valid wheel filename." % filename
-            )
-        self.filename = filename
-        self.name = wheel_info.group('name').replace('_', '-')
-        # we'll assume "_" means "-" due to wheel naming scheme
-        # (https://github.com/pypa/pip/issues/1150)
-        self.version = wheel_info.group('ver').replace('_', '-')
-        self.build_tag = wheel_info.group('build')
-        self.pyversions = wheel_info.group('pyver').split('.')
-        self.abis = wheel_info.group('abi').split('.')
-        self.plats = wheel_info.group('plat').split('.')
-
-        # All the tag combinations from this file
-        self.file_tags = {
-            (x, y, z) for x in self.pyversions
-            for y in self.abis for z in self.plats
-        }
-
-    def support_index_min(self, tags=None):
-        # type: (Optional[List[Pep425Tag]]) -> Optional[int]
-        """
-        Return the lowest index that one of the wheel's file_tag combinations
-        achieves in the supported_tags list e.g. if there are 8 supported tags,
-        and one of the file tags is first in the list, then return 0.  Returns
-        None is the wheel is not supported.
-        """
-        if tags is None:  # for mock
-            tags = pep425tags.get_supported()
-        indexes = [tags.index(c) for c in self.file_tags if c in tags]
-        return min(indexes) if indexes else None
-
-    def supported(self, tags=None):
-        # type: (Optional[List[Pep425Tag]]) -> bool
-        """Is this wheel supported on this system?"""
-        if tags is None:  # for mock
-            tags = pep425tags.get_supported()
-        return bool(set(tags).intersection(self.file_tags))
-
-
-def _contains_egg_info(
-        s, _egg_info_re=re.compile(r'([a-z0-9_.]+)-([a-z0-9_.!+-]+)', re.I)):
-    """Determine whether the string looks like an egg_info.
-
-    :param s: The string to parse. E.g. foo-2.1
-    """
-    return bool(_egg_info_re.search(s))
-
-
-def should_use_ephemeral_cache(
-    req,  # type: InstallRequirement
-    format_control,  # type: FormatControl
-    autobuilding,  # type: bool
-    cache_available  # type: bool
-):
-    # type: (...) -> Optional[bool]
-    """
-    Return whether to build an InstallRequirement object using the
-    ephemeral cache.
-
-    :param cache_available: whether a cache directory is available for the
-        autobuilding=True case.
-
-    :return: True or False to build the requirement with ephem_cache=True
-        or False, respectively; or None not to build the requirement.
-    """
-    if req.constraint:
-        return None
-    if req.is_wheel:
-        if not autobuilding:
-            logger.info(
-                'Skipping %s, due to already being wheel.', req.name,
-            )
-        return None
-    if not autobuilding:
-        return False
-
-    if req.editable or not req.source_dir:
-        return None
-
-    if req.link and not req.link.is_artifact:
-        # VCS checkout. Build wheel just for this run.
-        return True
-
-    if "binary" not in format_control.get_allowed_formats(
-            canonicalize_name(req.name)):
-        logger.info(
-            "Skipping bdist_wheel for %s, due to binaries "
-            "being disabled for it.", req.name,
-        )
-        return None
-
-    link = req.link
-    base, ext = link.splitext()
-    if cache_available and _contains_egg_info(base):
-        return False
-
-    # Otherwise, build the wheel just for this run using the ephemeral
-    # cache since we are either in the case of e.g. a local directory, or
-    # no cache directory is available to use.
-    return True
-
-
-def format_command(
-    command_args,  # type: List[str]
-    command_output,  # type: str
-):
-    # type: (...) -> str
-    """
-    Format command information for logging.
-    """
-    text = 'Command arguments: {}\n'.format(command_args)
-
-    if not command_output:
-        text += 'Command output: None'
-    elif logger.getEffectiveLevel() > logging.DEBUG:
-        text += 'Command output: [use --verbose to show]'
-    else:
-        if not command_output.endswith('\n'):
-            command_output += '\n'
-        text += (
-            'Command output:\n{}'
-            '-----------------------------------------'
-        ).format(command_output)
-
-    return text
-
-
-def get_legacy_build_wheel_path(
-    names,  # type: List[str]
-    temp_dir,  # type: str
-    req,  # type: InstallRequirement
-    command_args,  # type: List[str]
-    command_output,  # type: str
-):
-    # type: (...) -> Optional[str]
-    """
-    Return the path to the wheel in the temporary build directory.
-    """
-    # Sort for determinism.
-    names = sorted(names)
-    if not names:
-        msg = (
-            'Legacy build of wheel for {!r} created no files.\n'
-        ).format(req.name)
-        msg += format_command(command_args, command_output)
-        logger.warning(msg)
-        return None
-
-    if len(names) > 1:
-        msg = (
-            'Legacy build of wheel for {!r} created more than one file.\n'
-            'Filenames (choosing first): {}\n'
-        ).format(req.name, names)
-        msg += format_command(command_args, command_output)
-        logger.warning(msg)
-
-    return os.path.join(temp_dir, names[0])
-
-
-class WheelBuilder(object):
-    """Build wheels from a RequirementSet."""
-
-    def __init__(
-        self,
-        finder,  # type: PackageFinder
-        preparer,  # type: RequirementPreparer
-        wheel_cache,  # type: WheelCache
-        build_options=None,  # type: Optional[List[str]]
-        global_options=None,  # type: Optional[List[str]]
-        no_clean=False  # type: bool
-    ):
-        # type: (...) -> None
-        self.finder = finder
-        self.preparer = preparer
-        self.wheel_cache = wheel_cache
-
-        self._wheel_dir = preparer.wheel_download_dir
-
-        self.build_options = build_options or []
-        self.global_options = global_options or []
-        self.no_clean = no_clean
-
-    def _build_one(self, req, output_dir, python_tag=None):
-        """Build one wheel.
-
-        :return: The filename of the built wheel, or None if the build failed.
-        """
-        # Install build deps into temporary directory (PEP 518)
-        with req.build_env:
-            return self._build_one_inside_env(req, output_dir,
-                                              python_tag=python_tag)
-
-    def _build_one_inside_env(self, req, output_dir, python_tag=None):
-        with TempDirectory(kind="wheel") as temp_dir:
-            if req.use_pep517:
-                builder = self._build_one_pep517
-            else:
-                builder = self._build_one_legacy
-            wheel_path = builder(req, temp_dir.path, python_tag=python_tag)
-            if wheel_path is not None:
-                wheel_name = os.path.basename(wheel_path)
-                dest_path = os.path.join(output_dir, wheel_name)
-                try:
-                    shutil.move(wheel_path, dest_path)
-                    logger.info('Stored in directory: %s', output_dir)
-                    return dest_path
-                except Exception:
-                    pass
-            # Ignore return, we can't do anything else useful.
-            self._clean_one(req)
-            return None
-
-    def _base_setup_args(self, req):
-        # NOTE: Eventually, we'd want to also -S to the flags here, when we're
-        # isolating. Currently, it breaks Python in virtualenvs, because it
-        # relies on site.py to find parts of the standard library outside the
-        # virtualenv.
-        return [
-            sys.executable, '-u', '-c',
-            SETUPTOOLS_SHIM % req.setup_py
-        ] + list(self.global_options)
-
-    def _build_one_pep517(self, req, tempd, python_tag=None):
-        """Build one InstallRequirement using the PEP 517 build process.
-
-        Returns path to wheel if successfully built. Otherwise, returns None.
-        """
-        assert req.metadata_directory is not None
-        try:
-            req.spin_message = 'Building wheel for %s (PEP 517)' % (req.name,)
-            logger.debug('Destination directory: %s', tempd)
-            wheel_name = req.pep517_backend.build_wheel(
-                tempd,
-                metadata_directory=req.metadata_directory
-            )
-            if python_tag:
-                # General PEP 517 backends don't necessarily support
-                # a "--python-tag" option, so we rename the wheel
-                # file directly.
-                new_name = replace_python_tag(wheel_name, python_tag)
-                os.rename(
-                    os.path.join(tempd, wheel_name),
-                    os.path.join(tempd, new_name)
-                )
-                # Reassign to simplify the return at the end of function
-                wheel_name = new_name
-        except Exception:
-            logger.error('Failed building wheel for %s', req.name)
-            return None
-        return os.path.join(tempd, wheel_name)
-
-    def _build_one_legacy(self, req, tempd, python_tag=None):
-        """Build one InstallRequirement using the "legacy" build process.
-
-        Returns path to wheel if successfully built. Otherwise, returns None.
-        """
-        base_args = self._base_setup_args(req)
-
-        spin_message = 'Building wheel for %s (setup.py)' % (req.name,)
-        with open_spinner(spin_message) as spinner:
-            logger.debug('Destination directory: %s', tempd)
-            wheel_args = base_args + ['bdist_wheel', '-d', tempd] \
-                + self.build_options
-
-            if python_tag is not None:
-                wheel_args += ["--python-tag", python_tag]
-
-            try:
-                output = call_subprocess(wheel_args, cwd=req.setup_py_dir,
-                                         show_stdout=False, spinner=spinner)
-            except Exception:
-                spinner.finish("error")
-                logger.error('Failed building wheel for %s', req.name)
-                return None
-            names = os.listdir(tempd)
-            wheel_path = get_legacy_build_wheel_path(
-                names=names,
-                temp_dir=tempd,
-                req=req,
-                command_args=wheel_args,
-                command_output=output,
-            )
-            return wheel_path
-
-    def _clean_one(self, req):
-        base_args = self._base_setup_args(req)
-
-        logger.info('Running setup.py clean for %s', req.name)
-        clean_args = base_args + ['clean', '--all']
-        try:
-            call_subprocess(clean_args, cwd=req.source_dir, show_stdout=False)
-            return True
-        except Exception:
-            logger.error('Failed cleaning build dir for %s', req.name)
-            return False
-
-    def build(
-        self,
-        requirements,  # type: Iterable[InstallRequirement]
-        session,  # type: PipSession
-        autobuilding=False  # type: bool
-    ):
-        # type: (...) -> List[InstallRequirement]
-        """Build wheels.
-
-        :param unpack: If True, replace the sdist we built from with the
-            newly built wheel, in preparation for installation.
-        :return: True if all the wheels built correctly.
-        """
-        buildset = []
-        format_control = self.finder.format_control
-        # Whether a cache directory is available for autobuilding=True.
-        cache_available = bool(self._wheel_dir or self.wheel_cache.cache_dir)
-
-        for req in requirements:
-            ephem_cache = should_use_ephemeral_cache(
-                req, format_control=format_control, autobuilding=autobuilding,
-                cache_available=cache_available,
-            )
-            if ephem_cache is None:
-                continue
-
-            buildset.append((req, ephem_cache))
-
-        if not buildset:
-            return []
-
-        # Is any wheel build not using the ephemeral cache?
-        if any(not ephem_cache for _, ephem_cache in buildset):
-            have_directory_for_build = self._wheel_dir or (
-                autobuilding and self.wheel_cache.cache_dir
-            )
-            assert have_directory_for_build
-
-        # TODO by @pradyunsg
-        # Should break up this method into 2 separate methods.
-
-        # Build the wheels.
-        logger.info(
-            'Building wheels for collected packages: %s',
-            ', '.join([req.name for (req, _) in buildset]),
-        )
-        _cache = self.wheel_cache  # shorter name
-        with indent_log():
-            build_success, build_failure = [], []
-            for req, ephem in buildset:
-                python_tag = None
-                if autobuilding:
-                    python_tag = pep425tags.implementation_tag
-                    if ephem:
-                        output_dir = _cache.get_ephem_path_for_link(req.link)
-                    else:
-                        output_dir = _cache.get_path_for_link(req.link)
-                    try:
-                        ensure_dir(output_dir)
-                    except OSError as e:
-                        logger.warning("Building wheel for %s failed: %s",
-                                       req.name, e)
-                        build_failure.append(req)
-                        continue
-                else:
-                    output_dir = self._wheel_dir
-                wheel_file = self._build_one(
-                    req, output_dir,
-                    python_tag=python_tag,
-                )
-                if wheel_file:
-                    build_success.append(req)
-                    if autobuilding:
-                        # XXX: This is mildly duplicative with prepare_files,
-                        # but not close enough to pull out to a single common
-                        # method.
-                        # The code below assumes temporary source dirs -
-                        # prevent it doing bad things.
-                        if req.source_dir and not os.path.exists(os.path.join(
-                                req.source_dir, PIP_DELETE_MARKER_FILENAME)):
-                            raise AssertionError(
-                                "bad source dir - missing marker")
-                        # Delete the source we built the wheel from
-                        req.remove_temporary_source()
-                        # set the build directory again - name is known from
-                        # the work prepare_files did.
-                        req.source_dir = req.build_location(
-                            self.preparer.build_dir
-                        )
-                        # Update the link for this.
-                        req.link = Link(path_to_url(wheel_file))
-                        assert req.link.is_wheel
-                        # extract the wheel into the dir
-                        unpack_url(
-                            req.link, req.source_dir, None, False,
-                            session=session,
-                        )
-                else:
-                    build_failure.append(req)
-
-        # notify success/failure
-        if build_success:
-            logger.info(
-                'Successfully built %s',
-                ' '.join([req.name for req in build_success]),
-            )
-        if build_failure:
-            logger.info(
-                'Failed to build %s',
-                ' '.join([req.name for req in build_failure]),
-            )
-        # Return a list of requirements that failed to build
-        return build_failure
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/__init__.py
deleted file mode 100644
index b919b54..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/__init__.py
+++ /dev/null
@@ -1,111 +0,0 @@
-"""
-pip._vendor is for vendoring dependencies of pip to prevent needing pip to
-depend on something external.
-
-Files inside of pip._vendor should be considered immutable and should only be
-updated to versions from upstream.
-"""
-from __future__ import absolute_import
-
-import glob
-import os.path
-import sys
-
-# Downstream redistributors which have debundled our dependencies should also
-# patch this value to be true. This will trigger the additional patching
-# to cause things like "six" to be available as pip.
-DEBUNDLED = False
-
-# By default, look in this directory for a bunch of .whl files which we will
-# add to the beginning of sys.path before attempting to import anything. This
-# is done to support downstream re-distributors like Debian and Fedora who
-# wish to create their own Wheels for our dependencies to aid in debundling.
-WHEEL_DIR = os.path.abspath(os.path.dirname(__file__))
-
-
-# Define a small helper function to alias our vendored modules to the real ones
-# if the vendored ones do not exist. This idea of this was taken from
-# https://github.com/kennethreitz/requests/pull/2567.
-def vendored(modulename):
-    vendored_name = "{0}.{1}".format(__name__, modulename)
-
-    try:
-        __import__(vendored_name, globals(), locals(), level=0)
-    except ImportError:
-        try:
-            __import__(modulename, globals(), locals(), level=0)
-        except ImportError:
-            # We can just silently allow import failures to pass here. If we
-            # got to this point it means that ``import pip._vendor.whatever``
-            # failed and so did ``import whatever``. Since we're importing this
-            # upfront in an attempt to alias imports, not erroring here will
-            # just mean we get a regular import error whenever pip *actually*
-            # tries to import one of these modules to use it, which actually
-            # gives us a better error message than we would have otherwise
-            # gotten.
-            pass
-        else:
-            sys.modules[vendored_name] = sys.modules[modulename]
-            base, head = vendored_name.rsplit(".", 1)
-            setattr(sys.modules[base], head, sys.modules[modulename])
-
-
-# If we're operating in a debundled setup, then we want to go ahead and trigger
-# the aliasing of our vendored libraries as well as looking for wheels to add
-# to our sys.path. This will cause all of this code to be a no-op typically
-# however downstream redistributors can enable it in a consistent way across
-# all platforms.
-if DEBUNDLED:
-    # Actually look inside of WHEEL_DIR to find .whl files and add them to the
-    # front of our sys.path.
-    sys.path[:] = glob.glob(os.path.join(WHEEL_DIR, "*.whl")) + sys.path
-
-    # Actually alias all of our vendored dependencies.
-    vendored("cachecontrol")
-    vendored("colorama")
-    vendored("distlib")
-    vendored("distro")
-    vendored("html5lib")
-    vendored("lockfile")
-    vendored("six")
-    vendored("six.moves")
-    vendored("six.moves.urllib")
-    vendored("six.moves.urllib.parse")
-    vendored("packaging")
-    vendored("packaging.version")
-    vendored("packaging.specifiers")
-    vendored("pep517")
-    vendored("pkg_resources")
-    vendored("progress")
-    vendored("pytoml")
-    vendored("retrying")
-    vendored("requests")
-    vendored("requests.packages")
-    vendored("requests.packages.urllib3")
-    vendored("requests.packages.urllib3._collections")
-    vendored("requests.packages.urllib3.connection")
-    vendored("requests.packages.urllib3.connectionpool")
-    vendored("requests.packages.urllib3.contrib")
-    vendored("requests.packages.urllib3.contrib.ntlmpool")
-    vendored("requests.packages.urllib3.contrib.pyopenssl")
-    vendored("requests.packages.urllib3.exceptions")
-    vendored("requests.packages.urllib3.fields")
-    vendored("requests.packages.urllib3.filepost")
-    vendored("requests.packages.urllib3.packages")
-    vendored("requests.packages.urllib3.packages.ordered_dict")
-    vendored("requests.packages.urllib3.packages.six")
-    vendored("requests.packages.urllib3.packages.ssl_match_hostname")
-    vendored("requests.packages.urllib3.packages.ssl_match_hostname."
-             "_implementation")
-    vendored("requests.packages.urllib3.poolmanager")
-    vendored("requests.packages.urllib3.request")
-    vendored("requests.packages.urllib3.response")
-    vendored("requests.packages.urllib3.util")
-    vendored("requests.packages.urllib3.util.connection")
-    vendored("requests.packages.urllib3.util.request")
-    vendored("requests.packages.urllib3.util.response")
-    vendored("requests.packages.urllib3.util.retry")
-    vendored("requests.packages.urllib3.util.ssl_")
-    vendored("requests.packages.urllib3.util.timeout")
-    vendored("requests.packages.urllib3.util.url")
-    vendored("urllib3")
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/appdirs.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/appdirs.py
deleted file mode 100644
index 2bd3911..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/appdirs.py
+++ /dev/null
@@ -1,604 +0,0 @@
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-# Copyright (c) 2005-2010 ActiveState Software Inc.
-# Copyright (c) 2013 Eddy Petrișor
-
-"""Utilities for determining application-specific dirs.
-
-See <http://github.com/ActiveState/appdirs> for details and usage.
-"""
-# Dev Notes:
-# - MSDN on where to store app data files:
-#   http://support.microsoft.com/default.aspx?scid=kb;en-us;310294#XSLTH3194121123120121120120
-# - Mac OS X: http://developer.apple.com/documentation/MacOSX/Conceptual/BPFileSystem/index.html
-# - XDG spec for Un*x: http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html
-
-__version_info__ = (1, 4, 3)
-__version__ = '.'.join(map(str, __version_info__))
-
-
-import sys
-import os
-
-PY3 = sys.version_info[0] == 3
-
-if PY3:
-    unicode = str
-
-if sys.platform.startswith('java'):
-    import platform
-    os_name = platform.java_ver()[3][0]
-    if os_name.startswith('Windows'): # "Windows XP", "Windows 7", etc.
-        system = 'win32'
-    elif os_name.startswith('Mac'): # "Mac OS X", etc.
-        system = 'darwin'
-    else: # "Linux", "SunOS", "FreeBSD", etc.
-        # Setting this to "linux2" is not ideal, but only Windows or Mac
-        # are actually checked for and the rest of the module expects
-        # *sys.platform* style strings.
-        system = 'linux2'
-else:
-    system = sys.platform
-
-
-
-def user_data_dir(appname=None, appauthor=None, version=None, roaming=False):
-    r"""Return full path to the user-specific data dir for this application.
-
-        "appname" is the name of application.
-            If None, just the system directory is returned.
-        "appauthor" (only used on Windows) is the name of the
-            appauthor or distributing body for this application. Typically
-            it is the owning company name. This falls back to appname. You may
-            pass False to disable it.
-        "version" is an optional version path element to append to the
-            path. You might want to use this if you want multiple versions
-            of your app to be able to run independently. If used, this
-            would typically be "<major>.<minor>".
-            Only applied when appname is present.
-        "roaming" (boolean, default False) can be set True to use the Windows
-            roaming appdata directory. That means that for users on a Windows
-            network setup for roaming profiles, this user data will be
-            sync'd on login. See
-            <http://technet.microsoft.com/en-us/library/cc766489(WS.10).aspx>
-            for a discussion of issues.
-
-    Typical user data directories are:
-        Mac OS X:               ~/Library/Application Support/<AppName>
-        Unix:                   ~/.local/share/<AppName>    # or in $XDG_DATA_HOME, if defined
-        Win XP (not roaming):   C:\Documents and Settings\<username>\Application Data\<AppAuthor>\<AppName>
-        Win XP (roaming):       C:\Documents and Settings\<username>\Local Settings\Application Data\<AppAuthor>\<AppName>
-        Win 7  (not roaming):   C:\Users\<username>\AppData\Local\<AppAuthor>\<AppName>
-        Win 7  (roaming):       C:\Users\<username>\AppData\Roaming\<AppAuthor>\<AppName>
-
-    For Unix, we follow the XDG spec and support $XDG_DATA_HOME.
-    That means, by default "~/.local/share/<AppName>".
-    """
-    if system == "win32":
-        if appauthor is None:
-            appauthor = appname
-        const = roaming and "CSIDL_APPDATA" or "CSIDL_LOCAL_APPDATA"
-        path = os.path.normpath(_get_win_folder(const))
-        if appname:
-            if appauthor is not False:
-                path = os.path.join(path, appauthor, appname)
-            else:
-                path = os.path.join(path, appname)
-    elif system == 'darwin':
-        path = os.path.expanduser('~/Library/Application Support/')
-        if appname:
-            path = os.path.join(path, appname)
-    else:
-        path = os.getenv('XDG_DATA_HOME', os.path.expanduser("~/.local/share"))
-        if appname:
-            path = os.path.join(path, appname)
-    if appname and version:
-        path = os.path.join(path, version)
-    return path
-
-
-def site_data_dir(appname=None, appauthor=None, version=None, multipath=False):
-    r"""Return full path to the user-shared data dir for this application.
-
-        "appname" is the name of application.
-            If None, just the system directory is returned.
-        "appauthor" (only used on Windows) is the name of the
-            appauthor or distributing body for this application. Typically
-            it is the owning company name. This falls back to appname. You may
-            pass False to disable it.
-        "version" is an optional version path element to append to the
-            path. You might want to use this if you want multiple versions
-            of your app to be able to run independently. If used, this
-            would typically be "<major>.<minor>".
-            Only applied when appname is present.
-        "multipath" is an optional parameter only applicable to *nix
-            which indicates that the entire list of data dirs should be
-            returned. By default, the first item from XDG_DATA_DIRS is
-            returned, or '/usr/local/share/<AppName>',
-            if XDG_DATA_DIRS is not set
-
-    Typical site data directories are:
-        Mac OS X:   /Library/Application Support/<AppName>
-        Unix:       /usr/local/share/<AppName> or /usr/share/<AppName>
-        Win XP:     C:\Documents and Settings\All Users\Application Data\<AppAuthor>\<AppName>
-        Vista:      (Fail! "C:\ProgramData" is a hidden *system* directory on Vista.)
-        Win 7:      C:\ProgramData\<AppAuthor>\<AppName>   # Hidden, but writeable on Win 7.
-
-    For Unix, this is using the $XDG_DATA_DIRS[0] default.
-
-    WARNING: Do not use this on Windows. See the Vista-Fail note above for why.
-    """
-    if system == "win32":
-        if appauthor is None:
-            appauthor = appname
-        path = os.path.normpath(_get_win_folder("CSIDL_COMMON_APPDATA"))
-        if appname:
-            if appauthor is not False:
-                path = os.path.join(path, appauthor, appname)
-            else:
-                path = os.path.join(path, appname)
-    elif system == 'darwin':
-        path = os.path.expanduser('/Library/Application Support')
-        if appname:
-            path = os.path.join(path, appname)
-    else:
-        # XDG default for $XDG_DATA_DIRS
-        # only first, if multipath is False
-        path = os.getenv('XDG_DATA_DIRS',
-                         os.pathsep.join(['/usr/local/share', '/usr/share']))
-        pathlist = [os.path.expanduser(x.rstrip(os.sep)) for x in path.split(os.pathsep)]
-        if appname:
-            if version:
-                appname = os.path.join(appname, version)
-            pathlist = [os.sep.join([x, appname]) for x in pathlist]
-
-        if multipath:
-            path = os.pathsep.join(pathlist)
-        else:
-            path = pathlist[0]
-        return path
-
-    if appname and version:
-        path = os.path.join(path, version)
-    return path
-
-
-def user_config_dir(appname=None, appauthor=None, version=None, roaming=False):
-    r"""Return full path to the user-specific config dir for this application.
-
-        "appname" is the name of application.
-            If None, just the system directory is returned.
-        "appauthor" (only used on Windows) is the name of the
-            appauthor or distributing body for this application. Typically
-            it is the owning company name. This falls back to appname. You may
-            pass False to disable it.
-        "version" is an optional version path element to append to the
-            path. You might want to use this if you want multiple versions
-            of your app to be able to run independently. If used, this
-            would typically be "<major>.<minor>".
-            Only applied when appname is present.
-        "roaming" (boolean, default False) can be set True to use the Windows
-            roaming appdata directory. That means that for users on a Windows
-            network setup for roaming profiles, this user data will be
-            sync'd on login. See
-            <http://technet.microsoft.com/en-us/library/cc766489(WS.10).aspx>
-            for a discussion of issues.
-
-    Typical user config directories are:
-        Mac OS X:               same as user_data_dir
-        Unix:                   ~/.config/<AppName>     # or in $XDG_CONFIG_HOME, if defined
-        Win *:                  same as user_data_dir
-
-    For Unix, we follow the XDG spec and support $XDG_CONFIG_HOME.
-    That means, by default "~/.config/<AppName>".
-    """
-    if system in ["win32", "darwin"]:
-        path = user_data_dir(appname, appauthor, None, roaming)
-    else:
-        path = os.getenv('XDG_CONFIG_HOME', os.path.expanduser("~/.config"))
-        if appname:
-            path = os.path.join(path, appname)
-    if appname and version:
-        path = os.path.join(path, version)
-    return path
-
-
-def site_config_dir(appname=None, appauthor=None, version=None, multipath=False):
-    r"""Return full path to the user-shared data dir for this application.
-
-        "appname" is the name of application.
-            If None, just the system directory is returned.
-        "appauthor" (only used on Windows) is the name of the
-            appauthor or distributing body for this application. Typically
-            it is the owning company name. This falls back to appname. You may
-            pass False to disable it.
-        "version" is an optional version path element to append to the
-            path. You might want to use this if you want multiple versions
-            of your app to be able to run independently. If used, this
-            would typically be "<major>.<minor>".
-            Only applied when appname is present.
-        "multipath" is an optional parameter only applicable to *nix
-            which indicates that the entire list of config dirs should be
-            returned. By default, the first item from XDG_CONFIG_DIRS is
-            returned, or '/etc/xdg/<AppName>', if XDG_CONFIG_DIRS is not set
-
-    Typical site config directories are:
-        Mac OS X:   same as site_data_dir
-        Unix:       /etc/xdg/<AppName> or $XDG_CONFIG_DIRS[i]/<AppName> for each value in
-                    $XDG_CONFIG_DIRS
-        Win *:      same as site_data_dir
-        Vista:      (Fail! "C:\ProgramData" is a hidden *system* directory on Vista.)
-
-    For Unix, this is using the $XDG_CONFIG_DIRS[0] default, if multipath=False
-
-    WARNING: Do not use this on Windows. See the Vista-Fail note above for why.
-    """
-    if system in ["win32", "darwin"]:
-        path = site_data_dir(appname, appauthor)
-        if appname and version:
-            path = os.path.join(path, version)
-    else:
-        # XDG default for $XDG_CONFIG_DIRS
-        # only first, if multipath is False
-        path = os.getenv('XDG_CONFIG_DIRS', '/etc/xdg')
-        pathlist = [os.path.expanduser(x.rstrip(os.sep)) for x in path.split(os.pathsep)]
-        if appname:
-            if version:
-                appname = os.path.join(appname, version)
-            pathlist = [os.sep.join([x, appname]) for x in pathlist]
-
-        if multipath:
-            path = os.pathsep.join(pathlist)
-        else:
-            path = pathlist[0]
-    return path
-
-
-def user_cache_dir(appname=None, appauthor=None, version=None, opinion=True):
-    r"""Return full path to the user-specific cache dir for this application.
-
-        "appname" is the name of application.
-            If None, just the system directory is returned.
-        "appauthor" (only used on Windows) is the name of the
-            appauthor or distributing body for this application. Typically
-            it is the owning company name. This falls back to appname. You may
-            pass False to disable it.
-        "version" is an optional version path element to append to the
-            path. You might want to use this if you want multiple versions
-            of your app to be able to run independently. If used, this
-            would typically be "<major>.<minor>".
-            Only applied when appname is present.
-        "opinion" (boolean) can be False to disable the appending of
-            "Cache" to the base app data dir for Windows. See
-            discussion below.
-
-    Typical user cache directories are:
-        Mac OS X:   ~/Library/Caches/<AppName>
-        Unix:       ~/.cache/<AppName> (XDG default)
-        Win XP:     C:\Documents and Settings\<username>\Local Settings\Application Data\<AppAuthor>\<AppName>\Cache
-        Vista:      C:\Users\<username>\AppData\Local\<AppAuthor>\<AppName>\Cache
-
-    On Windows the only suggestion in the MSDN docs is that local settings go in
-    the `CSIDL_LOCAL_APPDATA` directory. This is identical to the non-roaming
-    app data dir (the default returned by `user_data_dir` above). Apps typically
-    put cache data somewhere *under* the given dir here. Some examples:
-        ...\Mozilla\Firefox\Profiles\<ProfileName>\Cache
-        ...\Acme\SuperApp\Cache\1.0
-    OPINION: This function appends "Cache" to the `CSIDL_LOCAL_APPDATA` value.
-    This can be disabled with the `opinion=False` option.
-    """
-    if system == "win32":
-        if appauthor is None:
-            appauthor = appname
-        path = os.path.normpath(_get_win_folder("CSIDL_LOCAL_APPDATA"))
-        if appname:
-            if appauthor is not False:
-                path = os.path.join(path, appauthor, appname)
-            else:
-                path = os.path.join(path, appname)
-            if opinion:
-                path = os.path.join(path, "Cache")
-    elif system == 'darwin':
-        path = os.path.expanduser('~/Library/Caches')
-        if appname:
-            path = os.path.join(path, appname)
-    else:
-        path = os.getenv('XDG_CACHE_HOME', os.path.expanduser('~/.cache'))
-        if appname:
-            path = os.path.join(path, appname)
-    if appname and version:
-        path = os.path.join(path, version)
-    return path
-
-
-def user_state_dir(appname=None, appauthor=None, version=None, roaming=False):
-    r"""Return full path to the user-specific state dir for this application.
-
-        "appname" is the name of application.
-            If None, just the system directory is returned.
-        "appauthor" (only used on Windows) is the name of the
-            appauthor or distributing body for this application. Typically
-            it is the owning company name. This falls back to appname. You may
-            pass False to disable it.
-        "version" is an optional version path element to append to the
-            path. You might want to use this if you want multiple versions
-            of your app to be able to run independently. If used, this
-            would typically be "<major>.<minor>".
-            Only applied when appname is present.
-        "roaming" (boolean, default False) can be set True to use the Windows
-            roaming appdata directory. That means that for users on a Windows
-            network setup for roaming profiles, this user data will be
-            sync'd on login. See
-            <http://technet.microsoft.com/en-us/library/cc766489(WS.10).aspx>
-            for a discussion of issues.
-
-    Typical user state directories are:
-        Mac OS X:  same as user_data_dir
-        Unix:      ~/.local/state/<AppName>   # or in $XDG_STATE_HOME, if defined
-        Win *:     same as user_data_dir
-
-    For Unix, we follow this Debian proposal <https://wiki.debian.org/XDGBaseDirectorySpecification#state>
-    to extend the XDG spec and support $XDG_STATE_HOME.
-
-    That means, by default "~/.local/state/<AppName>".
-    """
-    if system in ["win32", "darwin"]:
-        path = user_data_dir(appname, appauthor, None, roaming)
-    else:
-        path = os.getenv('XDG_STATE_HOME', os.path.expanduser("~/.local/state"))
-        if appname:
-            path = os.path.join(path, appname)
-    if appname and version:
-        path = os.path.join(path, version)
-    return path
-
-
-def user_log_dir(appname=None, appauthor=None, version=None, opinion=True):
-    r"""Return full path to the user-specific log dir for this application.
-
-        "appname" is the name of application.
-            If None, just the system directory is returned.
-        "appauthor" (only used on Windows) is the name of the
-            appauthor or distributing body for this application. Typically
-            it is the owning company name. This falls back to appname. You may
-            pass False to disable it.
-        "version" is an optional version path element to append to the
-            path. You might want to use this if you want multiple versions
-            of your app to be able to run independently. If used, this
-            would typically be "<major>.<minor>".
-            Only applied when appname is present.
-        "opinion" (boolean) can be False to disable the appending of
-            "Logs" to the base app data dir for Windows, and "log" to the
-            base cache dir for Unix. See discussion below.
-
-    Typical user log directories are:
-        Mac OS X:   ~/Library/Logs/<AppName>
-        Unix:       ~/.cache/<AppName>/log  # or under $XDG_CACHE_HOME if defined
-        Win XP:     C:\Documents and Settings\<username>\Local Settings\Application Data\<AppAuthor>\<AppName>\Logs
-        Vista:      C:\Users\<username>\AppData\Local\<AppAuthor>\<AppName>\Logs
-
-    On Windows the only suggestion in the MSDN docs is that local settings
-    go in the `CSIDL_LOCAL_APPDATA` directory. (Note: I'm interested in
-    examples of what some windows apps use for a logs dir.)
-
-    OPINION: This function appends "Logs" to the `CSIDL_LOCAL_APPDATA`
-    value for Windows and appends "log" to the user cache dir for Unix.
-    This can be disabled with the `opinion=False` option.
-    """
-    if system == "darwin":
-        path = os.path.join(
-            os.path.expanduser('~/Library/Logs'),
-            appname)
-    elif system == "win32":
-        path = user_data_dir(appname, appauthor, version)
-        version = False
-        if opinion:
-            path = os.path.join(path, "Logs")
-    else:
-        path = user_cache_dir(appname, appauthor, version)
-        version = False
-        if opinion:
-            path = os.path.join(path, "log")
-    if appname and version:
-        path = os.path.join(path, version)
-    return path
-
-
-class AppDirs(object):
-    """Convenience wrapper for getting application dirs."""
-    def __init__(self, appname=None, appauthor=None, version=None,
-            roaming=False, multipath=False):
-        self.appname = appname
-        self.appauthor = appauthor
-        self.version = version
-        self.roaming = roaming
-        self.multipath = multipath
-
-    @property
-    def user_data_dir(self):
-        return user_data_dir(self.appname, self.appauthor,
-                             version=self.version, roaming=self.roaming)
-
-    @property
-    def site_data_dir(self):
-        return site_data_dir(self.appname, self.appauthor,
-                             version=self.version, multipath=self.multipath)
-
-    @property
-    def user_config_dir(self):
-        return user_config_dir(self.appname, self.appauthor,
-                               version=self.version, roaming=self.roaming)
-
-    @property
-    def site_config_dir(self):
-        return site_config_dir(self.appname, self.appauthor,
-                             version=self.version, multipath=self.multipath)
-
-    @property
-    def user_cache_dir(self):
-        return user_cache_dir(self.appname, self.appauthor,
-                              version=self.version)
-
-    @property
-    def user_state_dir(self):
-        return user_state_dir(self.appname, self.appauthor,
-                              version=self.version)
-
-    @property
-    def user_log_dir(self):
-        return user_log_dir(self.appname, self.appauthor,
-                            version=self.version)
-
-
-#---- internal support stuff
-
-def _get_win_folder_from_registry(csidl_name):
-    """This is a fallback technique at best. I'm not sure if using the
-    registry for this guarantees us the correct answer for all CSIDL_*
-    names.
-    """
-    if PY3:
-      import winreg as _winreg
-    else:
-      import _winreg
-
-    shell_folder_name = {
-        "CSIDL_APPDATA": "AppData",
-        "CSIDL_COMMON_APPDATA": "Common AppData",
-        "CSIDL_LOCAL_APPDATA": "Local AppData",
-    }[csidl_name]
-
-    key = _winreg.OpenKey(
-        _winreg.HKEY_CURRENT_USER,
-        r"Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders"
-    )
-    dir, type = _winreg.QueryValueEx(key, shell_folder_name)
-    return dir
-
-
-def _get_win_folder_with_pywin32(csidl_name):
-    from win32com.shell import shellcon, shell
-    dir = shell.SHGetFolderPath(0, getattr(shellcon, csidl_name), 0, 0)
-    # Try to make this a unicode path because SHGetFolderPath does
-    # not return unicode strings when there is unicode data in the
-    # path.
-    try:
-        dir = unicode(dir)
-
-        # Downgrade to short path name if have highbit chars. See
-        # <http://bugs.activestate.com/show_bug.cgi?id=85099>.
-        has_high_char = False
-        for c in dir:
-            if ord(c) > 255:
-                has_high_char = True
-                break
-        if has_high_char:
-            try:
-                import win32api
-                dir = win32api.GetShortPathName(dir)
-            except ImportError:
-                pass
-    except UnicodeError:
-        pass
-    return dir
-
-
-def _get_win_folder_with_ctypes(csidl_name):
-    import ctypes
-
-    csidl_const = {
-        "CSIDL_APPDATA": 26,
-        "CSIDL_COMMON_APPDATA": 35,
-        "CSIDL_LOCAL_APPDATA": 28,
-    }[csidl_name]
-
-    buf = ctypes.create_unicode_buffer(1024)
-    ctypes.windll.shell32.SHGetFolderPathW(None, csidl_const, None, 0, buf)
-
-    # Downgrade to short path name if have highbit chars. See
-    # <http://bugs.activestate.com/show_bug.cgi?id=85099>.
-    has_high_char = False
-    for c in buf:
-        if ord(c) > 255:
-            has_high_char = True
-            break
-    if has_high_char:
-        buf2 = ctypes.create_unicode_buffer(1024)
-        if ctypes.windll.kernel32.GetShortPathNameW(buf.value, buf2, 1024):
-            buf = buf2
-
-    return buf.value
-
-def _get_win_folder_with_jna(csidl_name):
-    import array
-    from com.sun import jna
-    from com.sun.jna.platform import win32
-
-    buf_size = win32.WinDef.MAX_PATH * 2
-    buf = array.zeros('c', buf_size)
-    shell = win32.Shell32.INSTANCE
-    shell.SHGetFolderPath(None, getattr(win32.ShlObj, csidl_name), None, win32.ShlObj.SHGFP_TYPE_CURRENT, buf)
-    dir = jna.Native.toString(buf.tostring()).rstrip("\0")
-
-    # Downgrade to short path name if have highbit chars. See
-    # <http://bugs.activestate.com/show_bug.cgi?id=85099>.
-    has_high_char = False
-    for c in dir:
-        if ord(c) > 255:
-            has_high_char = True
-            break
-    if has_high_char:
-        buf = array.zeros('c', buf_size)
-        kernel = win32.Kernel32.INSTANCE
-        if kernel.GetShortPathName(dir, buf, buf_size):
-            dir = jna.Native.toString(buf.tostring()).rstrip("\0")
-
-    return dir
-
-if system == "win32":
-    try:
-        from ctypes import windll
-        _get_win_folder = _get_win_folder_with_ctypes
-    except ImportError:
-        try:
-            import com.sun.jna
-            _get_win_folder = _get_win_folder_with_jna
-        except ImportError:
-            _get_win_folder = _get_win_folder_from_registry
-
-
-#---- self test code
-
-if __name__ == "__main__":
-    appname = "MyApp"
-    appauthor = "MyCompany"
-
-    props = ("user_data_dir",
-             "user_config_dir",
-             "user_cache_dir",
-             "user_state_dir",
-             "user_log_dir",
-             "site_data_dir",
-             "site_config_dir")
-
-    print("-- app dirs %s --" % __version__)
-
-    print("-- app dirs (with optional 'version')")
-    dirs = AppDirs(appname, appauthor, version="1.0")
-    for prop in props:
-        print("%s: %s" % (prop, getattr(dirs, prop)))
-
-    print("\n-- app dirs (without optional 'version')")
-    dirs = AppDirs(appname, appauthor)
-    for prop in props:
-        print("%s: %s" % (prop, getattr(dirs, prop)))
-
-    print("\n-- app dirs (without optional 'appauthor')")
-    dirs = AppDirs(appname)
-    for prop in props:
-        print("%s: %s" % (prop, getattr(dirs, prop)))
-
-    print("\n-- app dirs (with disabled 'appauthor')")
-    dirs = AppDirs(appname, appauthor=False)
-    for prop in props:
-        print("%s: %s" % (prop, getattr(dirs, prop)))
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/__init__.py
deleted file mode 100644
index 8fdee66..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/__init__.py
+++ /dev/null
@@ -1,11 +0,0 @@
-"""CacheControl import Interface.
-
-Make it easy to import from cachecontrol without long namespaces.
-"""
-__author__ = "Eric Larson"
-__email__ = "eric@ionrock.org"
-__version__ = "0.12.5"
-
-from .wrapper import CacheControl
-from .adapter import CacheControlAdapter
-from .controller import CacheController
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/_cmd.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/_cmd.py
deleted file mode 100644
index f1e0ad9..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/_cmd.py
+++ /dev/null
@@ -1,57 +0,0 @@
-import logging
-
-from pip._vendor import requests
-
-from pip._vendor.cachecontrol.adapter import CacheControlAdapter
-from pip._vendor.cachecontrol.cache import DictCache
-from pip._vendor.cachecontrol.controller import logger
-
-from argparse import ArgumentParser
-
-
-def setup_logging():
-    logger.setLevel(logging.DEBUG)
-    handler = logging.StreamHandler()
-    logger.addHandler(handler)
-
-
-def get_session():
-    adapter = CacheControlAdapter(
-        DictCache(), cache_etags=True, serializer=None, heuristic=None
-    )
-    sess = requests.Session()
-    sess.mount("http://", adapter)
-    sess.mount("https://", adapter)
-
-    sess.cache_controller = adapter.controller
-    return sess
-
-
-def get_args():
-    parser = ArgumentParser()
-    parser.add_argument("url", help="The URL to try and cache")
-    return parser.parse_args()
-
-
-def main(args=None):
-    args = get_args()
-    sess = get_session()
-
-    # Make a request to get a response
-    resp = sess.get(args.url)
-
-    # Turn on logging
-    setup_logging()
-
-    # try setting the cache
-    sess.cache_controller.cache_response(resp.request, resp.raw)
-
-    # Now try to get it
-    if sess.cache_controller.cached_request(resp.request):
-        print("Cached!")
-    else:
-        print("Not cached :(")
-
-
-if __name__ == "__main__":
-    main()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/adapter.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/adapter.py
deleted file mode 100644
index 780eb28..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/adapter.py
+++ /dev/null
@@ -1,133 +0,0 @@
-import types
-import functools
-import zlib
-
-from pip._vendor.requests.adapters import HTTPAdapter
-
-from .controller import CacheController
-from .cache import DictCache
-from .filewrapper import CallbackFileWrapper
-
-
-class CacheControlAdapter(HTTPAdapter):
-    invalidating_methods = {"PUT", "DELETE"}
-
-    def __init__(
-        self,
-        cache=None,
-        cache_etags=True,
-        controller_class=None,
-        serializer=None,
-        heuristic=None,
-        cacheable_methods=None,
-        *args,
-        **kw
-    ):
-        super(CacheControlAdapter, self).__init__(*args, **kw)
-        self.cache = cache or DictCache()
-        self.heuristic = heuristic
-        self.cacheable_methods = cacheable_methods or ("GET",)
-
-        controller_factory = controller_class or CacheController
-        self.controller = controller_factory(
-            self.cache, cache_etags=cache_etags, serializer=serializer
-        )
-
-    def send(self, request, cacheable_methods=None, **kw):
-        """
-        Send a request. Use the request information to see if it
-        exists in the cache and cache the response if we need to and can.
-        """
-        cacheable = cacheable_methods or self.cacheable_methods
-        if request.method in cacheable:
-            try:
-                cached_response = self.controller.cached_request(request)
-            except zlib.error:
-                cached_response = None
-            if cached_response:
-                return self.build_response(request, cached_response, from_cache=True)
-
-            # check for etags and add headers if appropriate
-            request.headers.update(self.controller.conditional_headers(request))
-
-        resp = super(CacheControlAdapter, self).send(request, **kw)
-
-        return resp
-
-    def build_response(
-        self, request, response, from_cache=False, cacheable_methods=None
-    ):
-        """
-        Build a response by making a request or using the cache.
-
-        This will end up calling send and returning a potentially
-        cached response
-        """
-        cacheable = cacheable_methods or self.cacheable_methods
-        if not from_cache and request.method in cacheable:
-            # Check for any heuristics that might update headers
-            # before trying to cache.
-            if self.heuristic:
-                response = self.heuristic.apply(response)
-
-            # apply any expiration heuristics
-            if response.status == 304:
-                # We must have sent an ETag request. This could mean
-                # that we've been expired already or that we simply
-                # have an etag. In either case, we want to try and
-                # update the cache if that is the case.
-                cached_response = self.controller.update_cached_response(
-                    request, response
-                )
-
-                if cached_response is not response:
-                    from_cache = True
-
-                # We are done with the server response, read a
-                # possible response body (compliant servers will
-                # not return one, but we cannot be 100% sure) and
-                # release the connection back to the pool.
-                response.read(decode_content=False)
-                response.release_conn()
-
-                response = cached_response
-
-            # We always cache the 301 responses
-            elif response.status == 301:
-                self.controller.cache_response(request, response)
-            else:
-                # Wrap the response file with a wrapper that will cache the
-                #   response when the stream has been consumed.
-                response._fp = CallbackFileWrapper(
-                    response._fp,
-                    functools.partial(
-                        self.controller.cache_response, request, response
-                    ),
-                )
-                if response.chunked:
-                    super_update_chunk_length = response._update_chunk_length
-
-                    def _update_chunk_length(self):
-                        super_update_chunk_length()
-                        if self.chunk_left == 0:
-                            self._fp._close()
-
-                    response._update_chunk_length = types.MethodType(
-                        _update_chunk_length, response
-                    )
-
-        resp = super(CacheControlAdapter, self).build_response(request, response)
-
-        # See if we should invalidate the cache.
-        if request.method in self.invalidating_methods and resp.ok:
-            cache_url = self.controller.cache_url(request.url)
-            self.cache.delete(cache_url)
-
-        # Give the request a from_cache attr to let people use it
-        resp.from_cache = from_cache
-
-        return resp
-
-    def close(self):
-        self.cache.close()
-        super(CacheControlAdapter, self).close()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/cache.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/cache.py
deleted file mode 100644
index 94e0773..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/cache.py
+++ /dev/null
@@ -1,39 +0,0 @@
-"""
-The cache object API for implementing caches. The default is a thread
-safe in-memory dictionary.
-"""
-from threading import Lock
-
-
-class BaseCache(object):
-
-    def get(self, key):
-        raise NotImplementedError()
-
-    def set(self, key, value):
-        raise NotImplementedError()
-
-    def delete(self, key):
-        raise NotImplementedError()
-
-    def close(self):
-        pass
-
-
-class DictCache(BaseCache):
-
-    def __init__(self, init_dict=None):
-        self.lock = Lock()
-        self.data = init_dict or {}
-
-    def get(self, key):
-        return self.data.get(key, None)
-
-    def set(self, key, value):
-        with self.lock:
-            self.data.update({key: value})
-
-    def delete(self, key):
-        with self.lock:
-            if key in self.data:
-                self.data.pop(key)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/caches/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/caches/__init__.py
deleted file mode 100644
index 0e1658f..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/caches/__init__.py
+++ /dev/null
@@ -1,2 +0,0 @@
-from .file_cache import FileCache  # noqa
-from .redis_cache import RedisCache  # noqa
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/caches/file_cache.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/caches/file_cache.py
deleted file mode 100644
index 1ba0080..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/caches/file_cache.py
+++ /dev/null
@@ -1,146 +0,0 @@
-import hashlib
-import os
-from textwrap import dedent
-
-from ..cache import BaseCache
-from ..controller import CacheController
-
-try:
-    FileNotFoundError
-except NameError:
-    # py2.X
-    FileNotFoundError = (IOError, OSError)
-
-
-def _secure_open_write(filename, fmode):
-    # We only want to write to this file, so open it in write only mode
-    flags = os.O_WRONLY
-
-    # os.O_CREAT | os.O_EXCL will fail if the file already exists, so we only
-    #  will open *new* files.
-    # We specify this because we want to ensure that the mode we pass is the
-    # mode of the file.
-    flags |= os.O_CREAT | os.O_EXCL
-
-    # Do not follow symlinks to prevent someone from making a symlink that
-    # we follow and insecurely open a cache file.
-    if hasattr(os, "O_NOFOLLOW"):
-        flags |= os.O_NOFOLLOW
-
-    # On Windows we'll mark this file as binary
-    if hasattr(os, "O_BINARY"):
-        flags |= os.O_BINARY
-
-    # Before we open our file, we want to delete any existing file that is
-    # there
-    try:
-        os.remove(filename)
-    except (IOError, OSError):
-        # The file must not exist already, so we can just skip ahead to opening
-        pass
-
-    # Open our file, the use of os.O_CREAT | os.O_EXCL will ensure that if a
-    # race condition happens between the os.remove and this line, that an
-    # error will be raised. Because we utilize a lockfile this should only
-    # happen if someone is attempting to attack us.
-    fd = os.open(filename, flags, fmode)
-    try:
-        return os.fdopen(fd, "wb")
-
-    except:
-        # An error occurred wrapping our FD in a file object
-        os.close(fd)
-        raise
-
-
-class FileCache(BaseCache):
-
-    def __init__(
-        self,
-        directory,
-        forever=False,
-        filemode=0o0600,
-        dirmode=0o0700,
-        use_dir_lock=None,
-        lock_class=None,
-    ):
-
-        if use_dir_lock is not None and lock_class is not None:
-            raise ValueError("Cannot use use_dir_lock and lock_class together")
-
-        try:
-            from pip._vendor.lockfile import LockFile
-            from pip._vendor.lockfile.mkdirlockfile import MkdirLockFile
-        except ImportError:
-            notice = dedent(
-                """
-            NOTE: In order to use the FileCache you must have
-            lockfile installed. You can install it via pip:
-              pip install lockfile
-            """
-            )
-            raise ImportError(notice)
-
-        else:
-            if use_dir_lock:
-                lock_class = MkdirLockFile
-
-            elif lock_class is None:
-                lock_class = LockFile
-
-        self.directory = directory
-        self.forever = forever
-        self.filemode = filemode
-        self.dirmode = dirmode
-        self.lock_class = lock_class
-
-    @staticmethod
-    def encode(x):
-        return hashlib.sha224(x.encode()).hexdigest()
-
-    def _fn(self, name):
-        # NOTE: This method should not change as some may depend on it.
-        #       See: https://github.com/ionrock/cachecontrol/issues/63
-        hashed = self.encode(name)
-        parts = list(hashed[:5]) + [hashed]
-        return os.path.join(self.directory, *parts)
-
-    def get(self, key):
-        name = self._fn(key)
-        try:
-            with open(name, "rb") as fh:
-                return fh.read()
-
-        except FileNotFoundError:
-            return None
-
-    def set(self, key, value):
-        name = self._fn(key)
-
-        # Make sure the directory exists
-        try:
-            os.makedirs(os.path.dirname(name), self.dirmode)
-        except (IOError, OSError):
-            pass
-
-        with self.lock_class(name) as lock:
-            # Write our actual file
-            with _secure_open_write(lock.path, self.filemode) as fh:
-                fh.write(value)
-
-    def delete(self, key):
-        name = self._fn(key)
-        if not self.forever:
-            try:
-                os.remove(name)
-            except FileNotFoundError:
-                pass
-
-
-def url_to_file_path(url, filecache):
-    """Return the file cache path based on the URL.
-
-    This does not ensure the file exists!
-    """
-    key = CacheController.cache_url(url)
-    return filecache._fn(key)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/caches/redis_cache.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/caches/redis_cache.py
deleted file mode 100644
index ed705ce..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/caches/redis_cache.py
+++ /dev/null
@@ -1,33 +0,0 @@
-from __future__ import division
-
-from datetime import datetime
-from pip._vendor.cachecontrol.cache import BaseCache
-
-
-class RedisCache(BaseCache):
-
-    def __init__(self, conn):
-        self.conn = conn
-
-    def get(self, key):
-        return self.conn.get(key)
-
-    def set(self, key, value, expires=None):
-        if not expires:
-            self.conn.set(key, value)
-        else:
-            expires = expires - datetime.utcnow()
-            self.conn.setex(key, int(expires.total_seconds()), value)
-
-    def delete(self, key):
-        self.conn.delete(key)
-
-    def clear(self):
-        """Helper for clearing all the keys in a database. Use with
-        caution!"""
-        for key in self.conn.keys():
-            self.conn.delete(key)
-
-    def close(self):
-        """Redis uses connection pooling, no need to close the connection."""
-        pass
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/compat.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/compat.py
deleted file mode 100644
index 33b5aed..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/compat.py
+++ /dev/null
@@ -1,29 +0,0 @@
-try:
-    from urllib.parse import urljoin
-except ImportError:
-    from urlparse import urljoin
-
-
-try:
-    import cPickle as pickle
-except ImportError:
-    import pickle
-
-
-# Handle the case where the requests module has been patched to not have
-# urllib3 bundled as part of its source.
-try:
-    from pip._vendor.requests.packages.urllib3.response import HTTPResponse
-except ImportError:
-    from pip._vendor.urllib3.response import HTTPResponse
-
-try:
-    from pip._vendor.requests.packages.urllib3.util import is_fp_closed
-except ImportError:
-    from pip._vendor.urllib3.util import is_fp_closed
-
-# Replicate some six behaviour
-try:
-    text_type = unicode
-except NameError:
-    text_type = str
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/controller.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/controller.py
deleted file mode 100644
index 1b2b943..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/controller.py
+++ /dev/null
@@ -1,367 +0,0 @@
-"""
-The httplib2 algorithms ported for use with requests.
-"""
-import logging
-import re
-import calendar
-import time
-from email.utils import parsedate_tz
-
-from pip._vendor.requests.structures import CaseInsensitiveDict
-
-from .cache import DictCache
-from .serialize import Serializer
-
-
-logger = logging.getLogger(__name__)
-
-URI = re.compile(r"^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))?")
-
-
-def parse_uri(uri):
-    """Parses a URI using the regex given in Appendix B of RFC 3986.
-
-        (scheme, authority, path, query, fragment) = parse_uri(uri)
-    """
-    groups = URI.match(uri).groups()
-    return (groups[1], groups[3], groups[4], groups[6], groups[8])
-
-
-class CacheController(object):
-    """An interface to see if request should cached or not.
-    """
-
-    def __init__(
-        self, cache=None, cache_etags=True, serializer=None, status_codes=None
-    ):
-        self.cache = cache or DictCache()
-        self.cache_etags = cache_etags
-        self.serializer = serializer or Serializer()
-        self.cacheable_status_codes = status_codes or (200, 203, 300, 301)
-
-    @classmethod
-    def _urlnorm(cls, uri):
-        """Normalize the URL to create a safe key for the cache"""
-        (scheme, authority, path, query, fragment) = parse_uri(uri)
-        if not scheme or not authority:
-            raise Exception("Only absolute URIs are allowed. uri = %s" % uri)
-
-        scheme = scheme.lower()
-        authority = authority.lower()
-
-        if not path:
-            path = "/"
-
-        # Could do syntax based normalization of the URI before
-        # computing the digest. See Section 6.2.2 of Std 66.
-        request_uri = query and "?".join([path, query]) or path
-        defrag_uri = scheme + "://" + authority + request_uri
-
-        return defrag_uri
-
-    @classmethod
-    def cache_url(cls, uri):
-        return cls._urlnorm(uri)
-
-    def parse_cache_control(self, headers):
-        known_directives = {
-            # https://tools.ietf.org/html/rfc7234#section-5.2
-            "max-age": (int, True),
-            "max-stale": (int, False),
-            "min-fresh": (int, True),
-            "no-cache": (None, False),
-            "no-store": (None, False),
-            "no-transform": (None, False),
-            "only-if-cached": (None, False),
-            "must-revalidate": (None, False),
-            "public": (None, False),
-            "private": (None, False),
-            "proxy-revalidate": (None, False),
-            "s-maxage": (int, True),
-        }
-
-        cc_headers = headers.get("cache-control", headers.get("Cache-Control", ""))
-
-        retval = {}
-
-        for cc_directive in cc_headers.split(","):
-            if not cc_directive.strip():
-                continue
-
-            parts = cc_directive.split("=", 1)
-            directive = parts[0].strip()
-
-            try:
-                typ, required = known_directives[directive]
-            except KeyError:
-                logger.debug("Ignoring unknown cache-control directive: %s", directive)
-                continue
-
-            if not typ or not required:
-                retval[directive] = None
-            if typ:
-                try:
-                    retval[directive] = typ(parts[1].strip())
-                except IndexError:
-                    if required:
-                        logger.debug(
-                            "Missing value for cache-control " "directive: %s",
-                            directive,
-                        )
-                except ValueError:
-                    logger.debug(
-                        "Invalid value for cache-control directive " "%s, must be %s",
-                        directive,
-                        typ.__name__,
-                    )
-
-        return retval
-
-    def cached_request(self, request):
-        """
-        Return a cached response if it exists in the cache, otherwise
-        return False.
-        """
-        cache_url = self.cache_url(request.url)
-        logger.debug('Looking up "%s" in the cache', cache_url)
-        cc = self.parse_cache_control(request.headers)
-
-        # Bail out if the request insists on fresh data
-        if "no-cache" in cc:
-            logger.debug('Request header has "no-cache", cache bypassed')
-            return False
-
-        if "max-age" in cc and cc["max-age"] == 0:
-            logger.debug('Request header has "max_age" as 0, cache bypassed')
-            return False
-
-        # Request allows serving from the cache, let's see if we find something
-        cache_data = self.cache.get(cache_url)
-        if cache_data is None:
-            logger.debug("No cache entry available")
-            return False
-
-        # Check whether it can be deserialized
-        resp = self.serializer.loads(request, cache_data)
-        if not resp:
-            logger.warning("Cache entry deserialization failed, entry ignored")
-            return False
-
-        # If we have a cached 301, return it immediately. We don't
-        # need to test our response for other headers b/c it is
-        # intrinsically "cacheable" as it is Permanent.
-        # See:
-        #   https://tools.ietf.org/html/rfc7231#section-6.4.2
-        #
-        # Client can try to refresh the value by repeating the request
-        # with cache busting headers as usual (ie no-cache).
-        if resp.status == 301:
-            msg = (
-                'Returning cached "301 Moved Permanently" response '
-                "(ignoring date and etag information)"
-            )
-            logger.debug(msg)
-            return resp
-
-        headers = CaseInsensitiveDict(resp.headers)
-        if not headers or "date" not in headers:
-            if "etag" not in headers:
-                # Without date or etag, the cached response can never be used
-                # and should be deleted.
-                logger.debug("Purging cached response: no date or etag")
-                self.cache.delete(cache_url)
-            logger.debug("Ignoring cached response: no date")
-            return False
-
-        now = time.time()
-        date = calendar.timegm(parsedate_tz(headers["date"]))
-        current_age = max(0, now - date)
-        logger.debug("Current age based on date: %i", current_age)
-
-        # TODO: There is an assumption that the result will be a
-        #       urllib3 response object. This may not be best since we
-        #       could probably avoid instantiating or constructing the
-        #       response until we know we need it.
-        resp_cc = self.parse_cache_control(headers)
-
-        # determine freshness
-        freshness_lifetime = 0
-
-        # Check the max-age pragma in the cache control header
-        if "max-age" in resp_cc:
-            freshness_lifetime = resp_cc["max-age"]
-            logger.debug("Freshness lifetime from max-age: %i", freshness_lifetime)
-
-        # If there isn't a max-age, check for an expires header
-        elif "expires" in headers:
-            expires = parsedate_tz(headers["expires"])
-            if expires is not None:
-                expire_time = calendar.timegm(expires) - date
-                freshness_lifetime = max(0, expire_time)
-                logger.debug("Freshness lifetime from expires: %i", freshness_lifetime)
-
-        # Determine if we are setting freshness limit in the
-        # request. Note, this overrides what was in the response.
-        if "max-age" in cc:
-            freshness_lifetime = cc["max-age"]
-            logger.debug(
-                "Freshness lifetime from request max-age: %i", freshness_lifetime
-            )
-
-        if "min-fresh" in cc:
-            min_fresh = cc["min-fresh"]
-            # adjust our current age by our min fresh
-            current_age += min_fresh
-            logger.debug("Adjusted current age from min-fresh: %i", current_age)
-
-        # Return entry if it is fresh enough
-        if freshness_lifetime > current_age:
-            logger.debug('The response is "fresh", returning cached response')
-            logger.debug("%i > %i", freshness_lifetime, current_age)
-            return resp
-
-        # we're not fresh. If we don't have an Etag, clear it out
-        if "etag" not in headers:
-            logger.debug('The cached response is "stale" with no etag, purging')
-            self.cache.delete(cache_url)
-
-        # return the original handler
-        return False
-
-    def conditional_headers(self, request):
-        cache_url = self.cache_url(request.url)
-        resp = self.serializer.loads(request, self.cache.get(cache_url))
-        new_headers = {}
-
-        if resp:
-            headers = CaseInsensitiveDict(resp.headers)
-
-            if "etag" in headers:
-                new_headers["If-None-Match"] = headers["ETag"]
-
-            if "last-modified" in headers:
-                new_headers["If-Modified-Since"] = headers["Last-Modified"]
-
-        return new_headers
-
-    def cache_response(self, request, response, body=None, status_codes=None):
-        """
-        Algorithm for caching requests.
-
-        This assumes a requests Response object.
-        """
-        # From httplib2: Don't cache 206's since we aren't going to
-        #                handle byte range requests
-        cacheable_status_codes = status_codes or self.cacheable_status_codes
-        if response.status not in cacheable_status_codes:
-            logger.debug(
-                "Status code %s not in %s", response.status, cacheable_status_codes
-            )
-            return
-
-        response_headers = CaseInsensitiveDict(response.headers)
-
-        # If we've been given a body, our response has a Content-Length, that
-        # Content-Length is valid then we can check to see if the body we've
-        # been given matches the expected size, and if it doesn't we'll just
-        # skip trying to cache it.
-        if (
-            body is not None
-            and "content-length" in response_headers
-            and response_headers["content-length"].isdigit()
-            and int(response_headers["content-length"]) != len(body)
-        ):
-            return
-
-        cc_req = self.parse_cache_control(request.headers)
-        cc = self.parse_cache_control(response_headers)
-
-        cache_url = self.cache_url(request.url)
-        logger.debug('Updating cache with response from "%s"', cache_url)
-
-        # Delete it from the cache if we happen to have it stored there
-        no_store = False
-        if "no-store" in cc:
-            no_store = True
-            logger.debug('Response header has "no-store"')
-        if "no-store" in cc_req:
-            no_store = True
-            logger.debug('Request header has "no-store"')
-        if no_store and self.cache.get(cache_url):
-            logger.debug('Purging existing cache entry to honor "no-store"')
-            self.cache.delete(cache_url)
-        if no_store:
-            return
-
-        # If we've been given an etag, then keep the response
-        if self.cache_etags and "etag" in response_headers:
-            logger.debug("Caching due to etag")
-            self.cache.set(
-                cache_url, self.serializer.dumps(request, response, body=body)
-            )
-
-        # Add to the cache any 301s. We do this before looking that
-        # the Date headers.
-        elif response.status == 301:
-            logger.debug("Caching permanant redirect")
-            self.cache.set(cache_url, self.serializer.dumps(request, response))
-
-        # Add to the cache if the response headers demand it. If there
-        # is no date header then we can't do anything about expiring
-        # the cache.
-        elif "date" in response_headers:
-            # cache when there is a max-age > 0
-            if "max-age" in cc and cc["max-age"] > 0:
-                logger.debug("Caching b/c date exists and max-age > 0")
-                self.cache.set(
-                    cache_url, self.serializer.dumps(request, response, body=body)
-                )
-
-            # If the request can expire, it means we should cache it
-            # in the meantime.
-            elif "expires" in response_headers:
-                if response_headers["expires"]:
-                    logger.debug("Caching b/c of expires header")
-                    self.cache.set(
-                        cache_url, self.serializer.dumps(request, response, body=body)
-                    )
-
-    def update_cached_response(self, request, response):
-        """On a 304 we will get a new set of headers that we want to
-        update our cached value with, assuming we have one.
-
-        This should only ever be called when we've sent an ETag and
-        gotten a 304 as the response.
-        """
-        cache_url = self.cache_url(request.url)
-
-        cached_response = self.serializer.loads(request, self.cache.get(cache_url))
-
-        if not cached_response:
-            # we didn't have a cached response
-            return response
-
-        # Lets update our headers with the headers from the new request:
-        # http://tools.ietf.org/html/draft-ietf-httpbis-p4-conditional-26#section-4.1
-        #
-        # The server isn't supposed to send headers that would make
-        # the cached body invalid. But... just in case, we'll be sure
-        # to strip out ones we know that might be problmatic due to
-        # typical assumptions.
-        excluded_headers = ["content-length"]
-
-        cached_response.headers.update(
-            dict(
-                (k, v)
-                for k, v in response.headers.items()
-                if k.lower() not in excluded_headers
-            )
-        )
-
-        # we want a 200 b/c we have content via the cache
-        cached_response.status = 200
-
-        # update our cache
-        self.cache.set(cache_url, self.serializer.dumps(request, cached_response))
-
-        return cached_response
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/filewrapper.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/filewrapper.py
deleted file mode 100644
index 30ed4c5..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/filewrapper.py
+++ /dev/null
@@ -1,80 +0,0 @@
-from io import BytesIO
-
-
-class CallbackFileWrapper(object):
-    """
-    Small wrapper around a fp object which will tee everything read into a
-    buffer, and when that file is closed it will execute a callback with the
-    contents of that buffer.
-
-    All attributes are proxied to the underlying file object.
-
-    This class uses members with a double underscore (__) leading prefix so as
-    not to accidentally shadow an attribute.
-    """
-
-    def __init__(self, fp, callback):
-        self.__buf = BytesIO()
-        self.__fp = fp
-        self.__callback = callback
-
-    def __getattr__(self, name):
-        # The vaguaries of garbage collection means that self.__fp is
-        # not always set.  By using __getattribute__ and the private
-        # name[0] allows looking up the attribute value and raising an
-        # AttributeError when it doesn't exist. This stop thigns from
-        # infinitely recursing calls to getattr in the case where
-        # self.__fp hasn't been set.
-        #
-        # [0] https://docs.python.org/2/reference/expressions.html#atom-identifiers
-        fp = self.__getattribute__("_CallbackFileWrapper__fp")
-        return getattr(fp, name)
-
-    def __is_fp_closed(self):
-        try:
-            return self.__fp.fp is None
-
-        except AttributeError:
-            pass
-
-        try:
-            return self.__fp.closed
-
-        except AttributeError:
-            pass
-
-        # We just don't cache it then.
-        # TODO: Add some logging here...
-        return False
-
-    def _close(self):
-        if self.__callback:
-            self.__callback(self.__buf.getvalue())
-
-        # We assign this to None here, because otherwise we can get into
-        # really tricky problems where the CPython interpreter dead locks
-        # because the callback is holding a reference to something which
-        # has a __del__ method. Setting this to None breaks the cycle
-        # and allows the garbage collector to do it's thing normally.
-        self.__callback = None
-
-    def read(self, amt=None):
-        data = self.__fp.read(amt)
-        self.__buf.write(data)
-        if self.__is_fp_closed():
-            self._close()
-
-        return data
-
-    def _safe_read(self, amt):
-        data = self.__fp._safe_read(amt)
-        if amt == 2 and data == b"\r\n":
-            # urllib executes this read to toss the CRLF at the end
-            # of the chunk.
-            return data
-
-        self.__buf.write(data)
-        if self.__is_fp_closed():
-            self._close()
-
-        return data
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/heuristics.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/heuristics.py
deleted file mode 100644
index 6c0e979..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/heuristics.py
+++ /dev/null
@@ -1,135 +0,0 @@
-import calendar
-import time
-
-from email.utils import formatdate, parsedate, parsedate_tz
-
-from datetime import datetime, timedelta
-
-TIME_FMT = "%a, %d %b %Y %H:%M:%S GMT"
-
-
-def expire_after(delta, date=None):
-    date = date or datetime.utcnow()
-    return date + delta
-
-
-def datetime_to_header(dt):
-    return formatdate(calendar.timegm(dt.timetuple()))
-
-
-class BaseHeuristic(object):
-
-    def warning(self, response):
-        """
-        Return a valid 1xx warning header value describing the cache
-        adjustments.
-
-        The response is provided too allow warnings like 113
-        http://tools.ietf.org/html/rfc7234#section-5.5.4 where we need
-        to explicitly say response is over 24 hours old.
-        """
-        return '110 - "Response is Stale"'
-
-    def update_headers(self, response):
-        """Update the response headers with any new headers.
-
-        NOTE: This SHOULD always include some Warning header to
-              signify that the response was cached by the client, not
-              by way of the provided headers.
-        """
-        return {}
-
-    def apply(self, response):
-        updated_headers = self.update_headers(response)
-
-        if updated_headers:
-            response.headers.update(updated_headers)
-            warning_header_value = self.warning(response)
-            if warning_header_value is not None:
-                response.headers.update({"Warning": warning_header_value})
-
-        return response
-
-
-class OneDayCache(BaseHeuristic):
-    """
-    Cache the response by providing an expires 1 day in the
-    future.
-    """
-
-    def update_headers(self, response):
-        headers = {}
-
-        if "expires" not in response.headers:
-            date = parsedate(response.headers["date"])
-            expires = expire_after(timedelta(days=1), date=datetime(*date[:6]))
-            headers["expires"] = datetime_to_header(expires)
-            headers["cache-control"] = "public"
-        return headers
-
-
-class ExpiresAfter(BaseHeuristic):
-    """
-    Cache **all** requests for a defined time period.
-    """
-
-    def __init__(self, **kw):
-        self.delta = timedelta(**kw)
-
-    def update_headers(self, response):
-        expires = expire_after(self.delta)
-        return {"expires": datetime_to_header(expires), "cache-control": "public"}
-
-    def warning(self, response):
-        tmpl = "110 - Automatically cached for %s. Response might be stale"
-        return tmpl % self.delta
-
-
-class LastModified(BaseHeuristic):
-    """
-    If there is no Expires header already, fall back on Last-Modified
-    using the heuristic from
-    http://tools.ietf.org/html/rfc7234#section-4.2.2
-    to calculate a reasonable value.
-
-    Firefox also does something like this per
-    https://developer.mozilla.org/en-US/docs/Web/HTTP/Caching_FAQ
-    http://lxr.mozilla.org/mozilla-release/source/netwerk/protocol/http/nsHttpResponseHead.cpp#397
-    Unlike mozilla we limit this to 24-hr.
-    """
-    cacheable_by_default_statuses = {
-        200, 203, 204, 206, 300, 301, 404, 405, 410, 414, 501
-    }
-
-    def update_headers(self, resp):
-        headers = resp.headers
-
-        if "expires" in headers:
-            return {}
-
-        if "cache-control" in headers and headers["cache-control"] != "public":
-            return {}
-
-        if resp.status not in self.cacheable_by_default_statuses:
-            return {}
-
-        if "date" not in headers or "last-modified" not in headers:
-            return {}
-
-        date = calendar.timegm(parsedate_tz(headers["date"]))
-        last_modified = parsedate(headers["last-modified"])
-        if date is None or last_modified is None:
-            return {}
-
-        now = time.time()
-        current_age = max(0, now - date)
-        delta = date - calendar.timegm(last_modified)
-        freshness_lifetime = max(0, min(delta / 10, 24 * 3600))
-        if freshness_lifetime <= current_age:
-            return {}
-
-        expires = date + freshness_lifetime
-        return {"expires": time.strftime(TIME_FMT, time.gmtime(expires))}
-
-    def warning(self, resp):
-        return None
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/serialize.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/serialize.py
deleted file mode 100644
index ec43ff2..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/serialize.py
+++ /dev/null
@@ -1,186 +0,0 @@
-import base64
-import io
-import json
-import zlib
-
-from pip._vendor import msgpack
-from pip._vendor.requests.structures import CaseInsensitiveDict
-
-from .compat import HTTPResponse, pickle, text_type
-
-
-def _b64_decode_bytes(b):
-    return base64.b64decode(b.encode("ascii"))
-
-
-def _b64_decode_str(s):
-    return _b64_decode_bytes(s).decode("utf8")
-
-
-class Serializer(object):
-
-    def dumps(self, request, response, body=None):
-        response_headers = CaseInsensitiveDict(response.headers)
-
-        if body is None:
-            body = response.read(decode_content=False)
-
-            # NOTE: 99% sure this is dead code. I'm only leaving it
-            #       here b/c I don't have a test yet to prove
-            #       it. Basically, before using
-            #       `cachecontrol.filewrapper.CallbackFileWrapper`,
-            #       this made an effort to reset the file handle. The
-            #       `CallbackFileWrapper` short circuits this code by
-            #       setting the body as the content is consumed, the
-            #       result being a `body` argument is *always* passed
-            #       into cache_response, and in turn,
-            #       `Serializer.dump`.
-            response._fp = io.BytesIO(body)
-
-        # NOTE: This is all a bit weird, but it's really important that on
-        #       Python 2.x these objects are unicode and not str, even when
-        #       they contain only ascii. The problem here is that msgpack
-        #       understands the difference between unicode and bytes and we
-        #       have it set to differentiate between them, however Python 2
-        #       doesn't know the difference. Forcing these to unicode will be
-        #       enough to have msgpack know the difference.
-        data = {
-            u"response": {
-                u"body": body,
-                u"headers": dict(
-                    (text_type(k), text_type(v)) for k, v in response.headers.items()
-                ),
-                u"status": response.status,
-                u"version": response.version,
-                u"reason": text_type(response.reason),
-                u"strict": response.strict,
-                u"decode_content": response.decode_content,
-            }
-        }
-
-        # Construct our vary headers
-        data[u"vary"] = {}
-        if u"vary" in response_headers:
-            varied_headers = response_headers[u"vary"].split(",")
-            for header in varied_headers:
-                header = text_type(header).strip()
-                header_value = request.headers.get(header, None)
-                if header_value is not None:
-                    header_value = text_type(header_value)
-                data[u"vary"][header] = header_value
-
-        return b",".join([b"cc=4", msgpack.dumps(data, use_bin_type=True)])
-
-    def loads(self, request, data):
-        # Short circuit if we've been given an empty set of data
-        if not data:
-            return
-
-        # Determine what version of the serializer the data was serialized
-        # with
-        try:
-            ver, data = data.split(b",", 1)
-        except ValueError:
-            ver = b"cc=0"
-
-        # Make sure that our "ver" is actually a version and isn't a false
-        # positive from a , being in the data stream.
-        if ver[:3] != b"cc=":
-            data = ver + data
-            ver = b"cc=0"
-
-        # Get the version number out of the cc=N
-        ver = ver.split(b"=", 1)[-1].decode("ascii")
-
-        # Dispatch to the actual load method for the given version
-        try:
-            return getattr(self, "_loads_v{}".format(ver))(request, data)
-
-        except AttributeError:
-            # This is a version we don't have a loads function for, so we'll
-            # just treat it as a miss and return None
-            return
-
-    def prepare_response(self, request, cached):
-        """Verify our vary headers match and construct a real urllib3
-        HTTPResponse object.
-        """
-        # Special case the '*' Vary value as it means we cannot actually
-        # determine if the cached response is suitable for this request.
-        if "*" in cached.get("vary", {}):
-            return
-
-        # Ensure that the Vary headers for the cached response match our
-        # request
-        for header, value in cached.get("vary", {}).items():
-            if request.headers.get(header, None) != value:
-                return
-
-        body_raw = cached["response"].pop("body")
-
-        headers = CaseInsensitiveDict(data=cached["response"]["headers"])
-        if headers.get("transfer-encoding", "") == "chunked":
-            headers.pop("transfer-encoding")
-
-        cached["response"]["headers"] = headers
-
-        try:
-            body = io.BytesIO(body_raw)
-        except TypeError:
-            # This can happen if cachecontrol serialized to v1 format (pickle)
-            # using Python 2. A Python 2 str(byte string) will be unpickled as
-            # a Python 3 str (unicode string), which will cause the above to
-            # fail with:
-            #
-            #     TypeError: 'str' does not support the buffer interface
-            body = io.BytesIO(body_raw.encode("utf8"))
-
-        return HTTPResponse(body=body, preload_content=False, **cached["response"])
-
-    def _loads_v0(self, request, data):
-        # The original legacy cache data. This doesn't contain enough
-        # information to construct everything we need, so we'll treat this as
-        # a miss.
-        return
-
-    def _loads_v1(self, request, data):
-        try:
-            cached = pickle.loads(data)
-        except ValueError:
-            return
-
-        return self.prepare_response(request, cached)
-
-    def _loads_v2(self, request, data):
-        try:
-            cached = json.loads(zlib.decompress(data).decode("utf8"))
-        except (ValueError, zlib.error):
-            return
-
-        # We need to decode the items that we've base64 encoded
-        cached["response"]["body"] = _b64_decode_bytes(cached["response"]["body"])
-        cached["response"]["headers"] = dict(
-            (_b64_decode_str(k), _b64_decode_str(v))
-            for k, v in cached["response"]["headers"].items()
-        )
-        cached["response"]["reason"] = _b64_decode_str(cached["response"]["reason"])
-        cached["vary"] = dict(
-            (_b64_decode_str(k), _b64_decode_str(v) if v is not None else v)
-            for k, v in cached["vary"].items()
-        )
-
-        return self.prepare_response(request, cached)
-
-    def _loads_v3(self, request, data):
-        # Due to Python 2 encoding issues, it's impossible to know for sure
-        # exactly how to load v3 entries, thus we'll treat these as a miss so
-        # that they get rewritten out as v4 entries.
-        return
-
-    def _loads_v4(self, request, data):
-        try:
-            cached = msgpack.loads(data, encoding="utf-8")
-        except ValueError:
-            return
-
-        return self.prepare_response(request, cached)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/wrapper.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/wrapper.py
deleted file mode 100644
index 265bfc8..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/cachecontrol/wrapper.py
+++ /dev/null
@@ -1,29 +0,0 @@
-from .adapter import CacheControlAdapter
-from .cache import DictCache
-
-
-def CacheControl(
-    sess,
-    cache=None,
-    cache_etags=True,
-    serializer=None,
-    heuristic=None,
-    controller_class=None,
-    adapter_class=None,
-    cacheable_methods=None,
-):
-
-    cache = cache or DictCache()
-    adapter_class = adapter_class or CacheControlAdapter
-    adapter = adapter_class(
-        cache,
-        cache_etags=cache_etags,
-        serializer=serializer,
-        heuristic=heuristic,
-        controller_class=controller_class,
-        cacheable_methods=cacheable_methods,
-    )
-    sess.mount("http://", adapter)
-    sess.mount("https://", adapter)
-
-    return sess
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/certifi/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/certifi/__init__.py
deleted file mode 100644
index ef71f3a..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/certifi/__init__.py
+++ /dev/null
@@ -1,3 +0,0 @@
-from .core import where
-
-__version__ = "2018.11.29"
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/certifi/__main__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/certifi/__main__.py
deleted file mode 100644
index ae2aff5..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/certifi/__main__.py
+++ /dev/null
@@ -1,2 +0,0 @@
-from pip._vendor.certifi import where
-print(where())
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/certifi/cacert.pem b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/certifi/cacert.pem
deleted file mode 100644
index db68797..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/certifi/cacert.pem
+++ /dev/null
@@ -1,4512 +0,0 @@
-
-# Issuer: CN=GlobalSign Root CA O=GlobalSign nv-sa OU=Root CA
-# Subject: CN=GlobalSign Root CA O=GlobalSign nv-sa OU=Root CA
-# Label: "GlobalSign Root CA"
-# Serial: 4835703278459707669005204
-# MD5 Fingerprint: 3e:45:52:15:09:51:92:e1:b7:5d:37:9f:b1:87:29:8a
-# SHA1 Fingerprint: b1:bc:96:8b:d4:f4:9d:62:2a:a8:9a:81:f2:15:01:52:a4:1d:82:9c
-# SHA256 Fingerprint: eb:d4:10:40:e4:bb:3e:c7:42:c9:e3:81:d3:1e:f2:a4:1a:48:b6:68:5c:96:e7:ce:f3:c1:df:6c:d4:33:1c:99
------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=GlobalSign O=GlobalSign OU=GlobalSign Root CA - R2
-# Subject: CN=GlobalSign O=GlobalSign OU=GlobalSign Root CA - R2
-# Label: "GlobalSign Root CA - R2"
-# Serial: 4835703278459682885658125
-# MD5 Fingerprint: 94:14:77:7e:3e:5e:fd:8f:30:bd:41:b0:cf:e7:d0:30
-# SHA1 Fingerprint: 75:e0:ab:b6:13:85:12:27:1c:04:f8:5f:dd:de:38:e4:b7:24:2e:fe
-# SHA256 Fingerprint: ca:42:dd:41:74:5f:d0:b8:1e:b9:02:36:2c:f9:d8:bf:71:9d:a1:bd:1b:1e:fc:94:6f:5b:4c:99:f4:2c:1b:9e
------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=VeriSign Class 3 Public Primary Certification Authority - G3 O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 1999 VeriSign, Inc. - For authorized use only
-# Subject: CN=VeriSign Class 3 Public Primary Certification Authority - G3 O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 1999 VeriSign, Inc. - For authorized use only
-# Label: "Verisign Class 3 Public Primary Certification Authority - G3"
-# Serial: 206684696279472310254277870180966723415
-# MD5 Fingerprint: cd:68:b6:a7:c7:c4:ce:75:e0:1d:4f:57:44:61:92:09
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=Entrust.net Certification Authority (2048) O=Entrust.net OU=www.entrust.net/CPS_2048 incorp. by ref. (limits liab.)/(c) 1999 Entrust.net Limited
-# Subject: CN=Entrust.net Certification Authority (2048) O=Entrust.net OU=www.entrust.net/CPS_2048 incorp. by ref. (limits liab.)/(c) 1999 Entrust.net Limited
-# Label: "Entrust.net Premium 2048 Secure Server CA"
-# Serial: 946069240
-# MD5 Fingerprint: ee:29:31:bc:32:7e:9a:e6:e8:b5:f7:51:b4:34:71:90
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=AAA Certificate Services O=Comodo CA Limited
-# Subject: CN=AAA Certificate Services O=Comodo CA Limited
-# Label: "Comodo AAA Services root"
-# Serial: 1
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=QuoVadis Root Certification Authority O=QuoVadis Limited OU=Root Certification Authority
-# Subject: CN=QuoVadis Root Certification Authority O=QuoVadis Limited OU=Root Certification Authority
-# Label: "QuoVadis Root CA"
-# Serial: 985026699
-# MD5 Fingerprint: 27:de:36:fe:72:b7:00:03:00:9d:f4:f0:1e:6c:04:24
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=QuoVadis Root CA 2 O=QuoVadis Limited
-# Subject: CN=QuoVadis Root CA 2 O=QuoVadis Limited
-# Label: "QuoVadis Root CA 2"
-# Serial: 1289
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=QuoVadis Root CA 3 O=QuoVadis Limited
-# Subject: CN=QuoVadis Root CA 3 O=QuoVadis Limited
-# Label: "QuoVadis Root CA 3"
-# Serial: 1478
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: O=SECOM Trust.net OU=Security Communication RootCA1
-# Subject: O=SECOM Trust.net OU=Security Communication RootCA1
-# Label: "Security Communication Root CA"
-# Serial: 0
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=Sonera Class2 CA O=Sonera
-# Subject: CN=Sonera Class2 CA O=Sonera
-# Label: "Sonera Class 2 Root CA"
-# Serial: 29
-# MD5 Fingerprint: a3:ec:75:0f:2e:88:df:fa:48:01:4e:0b:5c:48:6f:fb
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=XRamp Global Certification Authority O=XRamp Security Services Inc OU=www.xrampsecurity.com
-# Subject: CN=XRamp Global Certification Authority O=XRamp Security Services Inc OU=www.xrampsecurity.com
-# Label: "XRamp Global CA Root"
-# Serial: 107108908803651509692980124233745014957
-# MD5 Fingerprint: a1:0b:44:b3:ca:10:d8:00:6e:9d:0f:d8:0f:92:0a:d1
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: O=The Go Daddy Group, Inc. OU=Go Daddy Class 2 Certification Authority
-# Subject: O=The Go Daddy Group, Inc. OU=Go Daddy Class 2 Certification Authority
-# Label: "Go Daddy Class 2 CA"
-# Serial: 0
-# MD5 Fingerprint: 91:de:06:25:ab:da:fd:32:17:0c:bb:25:17:2a:84:67
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: O=Starfield Technologies, Inc. OU=Starfield Class 2 Certification Authority
-# Subject: O=Starfield Technologies, Inc. OU=Starfield Class 2 Certification Authority
-# Label: "Starfield Class 2 CA"
-# Serial: 0
-# MD5 Fingerprint: 32:4a:4b:bb:c8:63:69:9b:be:74:9a:c6:dd:1d:46:24
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: O=Government Root Certification Authority
-# Subject: O=Government Root Certification Authority
-# Label: "Taiwan GRCA"
-# Serial: 42023070807708724159991140556527066870
-# MD5 Fingerprint: 37:85:44:53:32:45:1f:20:f0:f3:95:e1:25:c4:43:4e
-# SHA1 Fingerprint: f4:8b:11:bf:de:ab:be:94:54:20:71:e6:41:de:6b:be:88:2b:40:b9
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=DigiCert Assured ID Root CA O=DigiCert Inc OU=www.digicert.com
-# Subject: CN=DigiCert Assured ID Root CA O=DigiCert Inc OU=www.digicert.com
-# Label: "DigiCert Assured ID Root CA"
-# Serial: 17154717934120587862167794914071425081
-# MD5 Fingerprint: 87:ce:0b:7b:2a:0e:49:00:e1:58:71:9b:37:a8:93:72
-# SHA1 Fingerprint: 05:63:b8:63:0d:62:d7:5a:bb:c8:ab:1e:4b:df:b5:a8:99:b2:4d:43
-# SHA256 Fingerprint: 3e:90:99:b5:01:5e:8f:48:6c:00:bc:ea:9d:11:1e:e7:21:fa:ba:35:5a:89:bc:f1:df:69:56:1e:3d:c6:32:5c
------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=DigiCert Global Root CA O=DigiCert Inc OU=www.digicert.com
-# Subject: CN=DigiCert Global Root CA O=DigiCert Inc OU=www.digicert.com
-# Label: "DigiCert Global Root CA"
-# Serial: 10944719598952040374951832963794454346
-# MD5 Fingerprint: 79:e4:a9:84:0d:7d:3a:96:d7:c0:4f:e2:43:4c:89:2e
-# SHA1 Fingerprint: a8:98:5d:3a:65:e5:e5:c4:b2:d7:d6:6d:40:c6:dd:2f:b1:9c:54:36
-# SHA256 Fingerprint: 43:48:a0:e9:44:4c:78:cb:26:5e:05:8d:5e:89:44:b4:d8:4f:96:62:bd:26:db:25:7f:89:34:a4:43:c7:01:61
------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=DigiCert High Assurance EV Root CA O=DigiCert Inc OU=www.digicert.com
-# Subject: CN=DigiCert High Assurance EV Root CA O=DigiCert Inc OU=www.digicert.com
-# Label: "DigiCert High Assurance EV Root CA"
-# Serial: 3553400076410547919724730734378100087
-# MD5 Fingerprint: d4:74:de:57:5c:39:b2:d3:9c:85:83:c5:c0:65:49:8a
-# SHA1 Fingerprint: 5f:b7:ee:06:33:e2:59:db:ad:0c:4c:9a:e6:d3:8f:1a:61:c7:dc:25
-# SHA256 Fingerprint: 74:31:e5:f4:c3:c1:ce:46:90:77:4f:0b:61:e0:54:40:88:3b:a9:a0:1e:d0:0b:a6:ab:d7:80:6e:d3:b1:18:cf
------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=Class 2 Primary CA O=Certplus
-# Subject: CN=Class 2 Primary CA O=Certplus
-# Label: "Certplus Class 2 Primary CA"
-# Serial: 177770208045934040241468760488327595043
-# MD5 Fingerprint: 88:2c:8c:52:b8:a2:3c:f3:f7:bb:03:ea:ae:ac:42:0b
-# SHA1 Fingerprint: 74:20:74:41:72:9c:dd:92:ec:79:31:d8:23:10:8d:c2:81:92:e2:bb
-# SHA256 Fingerprint: 0f:99:3c:8a:ef:97:ba:af:56:87:14:0e:d5:9a:d1:82:1b:b4:af:ac:f0:aa:9a:58:b5:d5:7a:33:8a:3a:fb:cb
------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=DST Root CA X3 O=Digital Signature Trust Co.
-# Subject: CN=DST Root CA X3 O=Digital Signature Trust Co.
-# Label: "DST Root CA X3"
-# Serial: 91299735575339953335919266965803778155
-# MD5 Fingerprint: 41:03:52:dc:0f:f7:50:1b:16:f0:02:8e:ba:6f:45:c5
-# SHA1 Fingerprint: da:c9:02:4f:54:d8:f6:df:94:93:5f:b1:73:26:38:ca:6a:d7:7c:13
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=SwissSign Gold CA - G2 O=SwissSign AG
-# Subject: CN=SwissSign Gold CA - G2 O=SwissSign AG
-# Label: "SwissSign Gold CA - G2"
-# Serial: 13492815561806991280
-# MD5 Fingerprint: 24:77:d9:a8:91:d1:3b:fa:88:2d:c2:ff:f8:cd:33:93
-# SHA1 Fingerprint: d8:c5:38:8a:b7:30:1b:1b:6e:d4:7a:e6:45:25:3a:6f:9f:1a:27:61
-# SHA256 Fingerprint: 62:dd:0b:e9:b9:f5:0a:16:3e:a0:f8:e7:5c:05:3b:1e:ca:57:ea:55:c8:68:8f:64:7c:68:81:f2:c8:35:7b:95
------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=SwissSign Silver CA - G2 O=SwissSign AG
-# Subject: CN=SwissSign Silver CA - G2 O=SwissSign AG
-# Label: "SwissSign Silver CA - G2"
-# Serial: 5700383053117599563
-# MD5 Fingerprint: e0:06:a1:c9:7d:cf:c9:fc:0d:c0:56:75:96:d8:62:13
-# SHA1 Fingerprint: 9b:aa:e5:9f:56:ee:21:cb:43:5a:be:25:93:df:a7:f0:40:d1:1d:cb
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=GeoTrust Primary Certification Authority O=GeoTrust Inc.
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-# Label: "GeoTrust Primary Certification Authority"
-# Serial: 32798226551256963324313806436981982369
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=thawte Primary Root CA O=thawte, Inc. OU=Certification Services Division/(c) 2006 thawte, Inc. - For authorized use only
-# Subject: CN=thawte Primary Root CA O=thawte, Inc. OU=Certification Services Division/(c) 2006 thawte, Inc. - For authorized use only
-# Label: "thawte Primary Root CA"
-# Serial: 69529181992039203566298953787712940909
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=VeriSign Class 3 Public Primary Certification Authority - G5 O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 2006 VeriSign, Inc. - For authorized use only
-# Subject: CN=VeriSign Class 3 Public Primary Certification Authority - G5 O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 2006 VeriSign, Inc. - For authorized use only
-# Label: "VeriSign Class 3 Public Primary Certification Authority - G5"
-# Serial: 33037644167568058970164719475676101450
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=SecureTrust CA O=SecureTrust Corporation
-# Subject: CN=SecureTrust CA O=SecureTrust Corporation
-# Label: "SecureTrust CA"
-# Serial: 17199774589125277788362757014266862032
-# MD5 Fingerprint: dc:32:c3:a7:6d:25:57:c7:68:09:9d:ea:2d:a9:a2:d1
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=Secure Global CA O=SecureTrust Corporation
-# Subject: CN=Secure Global CA O=SecureTrust Corporation
-# Label: "Secure Global CA"
-# Serial: 9751836167731051554232119481456978597
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=Network Solutions Certificate Authority O=Network Solutions L.L.C.
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------END CERTIFICATE-----
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-# Issuer: CN=Certigna O=Dhimyotis
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-# Label: "Deutsche Telekom Root CA 2"
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------END CERTIFICATE-----
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-# Issuer: CN=Cybertrust Global Root O=Cybertrust, Inc
-# Subject: CN=Cybertrust Global Root O=Cybertrust, Inc
-# Label: "Cybertrust Global Root"
-# Serial: 4835703278459682877484360
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: O=Chunghwa Telecom Co., Ltd. OU=ePKI Root Certification Authority
-# Subject: O=Chunghwa Telecom Co., Ltd. OU=ePKI Root Certification Authority
-# Label: "ePKI Root Certification Authority"
-# Serial: 28956088682735189655030529057352760477
-# MD5 Fingerprint: 1b:2e:00:ca:26:06:90:3d:ad:fe:6f:15:68:d3:6b:b3
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: O=certSIGN OU=certSIGN ROOT CA
-# Subject: O=certSIGN OU=certSIGN ROOT CA
-# Label: "certSIGN ROOT CA"
-# Serial: 35210227249154
-# MD5 Fingerprint: 18:98:c0:d6:e9:3a:fc:f9:b0:f5:0c:f7:4b:01:44:17
-# SHA1 Fingerprint: fa:b7:ee:36:97:26:62:fb:2d:b0:2a:f6:bf:03:fd:e8:7c:4b:2f:9b
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=GeoTrust Primary Certification Authority - G3 O=GeoTrust Inc. OU=(c) 2008 GeoTrust Inc. - For authorized use only
-# Subject: CN=GeoTrust Primary Certification Authority - G3 O=GeoTrust Inc. OU=(c) 2008 GeoTrust Inc. - For authorized use only
-# Label: "GeoTrust Primary Certification Authority - G3"
-# Serial: 28809105769928564313984085209975885599
-# MD5 Fingerprint: b5:e8:34:36:c9:10:44:58:48:70:6d:2e:83:d4:b8:05
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=thawte Primary Root CA - G2 O=thawte, Inc. OU=(c) 2007 thawte, Inc. - For authorized use only
-# Subject: CN=thawte Primary Root CA - G2 O=thawte, Inc. OU=(c) 2007 thawte, Inc. - For authorized use only
-# Label: "thawte Primary Root CA - G2"
-# Serial: 71758320672825410020661621085256472406
-# MD5 Fingerprint: 74:9d:ea:60:24:c4:fd:22:53:3e:cc:3a:72:d9:29:4f
-# SHA1 Fingerprint: aa:db:bc:22:23:8f:c4:01:a1:27:bb:38:dd:f4:1d:db:08:9e:f0:12
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=thawte Primary Root CA - G3 O=thawte, Inc. OU=Certification Services Division/(c) 2008 thawte, Inc. - For authorized use only
-# Subject: CN=thawte Primary Root CA - G3 O=thawte, Inc. OU=Certification Services Division/(c) 2008 thawte, Inc. - For authorized use only
-# Label: "thawte Primary Root CA - G3"
-# Serial: 127614157056681299805556476275995414779
-# MD5 Fingerprint: fb:1b:5d:43:8a:94:cd:44:c6:76:f2:43:4b:47:e7:31
-# SHA1 Fingerprint: f1:8b:53:8d:1b:e9:03:b6:a6:f0:56:43:5b:17:15:89:ca:f3:6b:f2
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=GeoTrust Primary Certification Authority - G2 O=GeoTrust Inc. OU=(c) 2007 GeoTrust Inc. - For authorized use only
-# Subject: CN=GeoTrust Primary Certification Authority - G2 O=GeoTrust Inc. OU=(c) 2007 GeoTrust Inc. - For authorized use only
-# Label: "GeoTrust Primary Certification Authority - G2"
-# Serial: 80682863203381065782177908751794619243
-# MD5 Fingerprint: 01:5e:d8:6b:bd:6f:3d:8e:a1:31:f8:12:e0:98:73:6a
-# SHA1 Fingerprint: 8d:17:84:d5:37:f3:03:7d:ec:70:fe:57:8b:51:9a:99:e6:10:d7:b0
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=VeriSign Universal Root Certification Authority O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 2008 VeriSign, Inc. - For authorized use only
-# Subject: CN=VeriSign Universal Root Certification Authority O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 2008 VeriSign, Inc. - For authorized use only
-# Label: "VeriSign Universal Root Certification Authority"
-# Serial: 85209574734084581917763752644031726877
-# MD5 Fingerprint: 8e:ad:b5:01:aa:4d:81:e4:8c:1d:d1:e1:14:00:95:19
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=VeriSign Class 3 Public Primary Certification Authority - G4 O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 2007 VeriSign, Inc. - For authorized use only
-# Subject: CN=VeriSign Class 3 Public Primary Certification Authority - G4 O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 2007 VeriSign, Inc. - For authorized use only
-# Label: "VeriSign Class 3 Public Primary Certification Authority - G4"
-# Serial: 63143484348153506665311985501458640051
-# MD5 Fingerprint: 3a:52:e1:e7:fd:6f:3a:e3:6f:f3:6f:99:1b:f9:22:41
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=NetLock Arany (Class Gold) F\u0151tan\xfas\xedtv\xe1ny O=NetLock Kft. OU=Tan\xfas\xedtv\xe1nykiad\xf3k (Certification Services)
-# Subject: CN=NetLock Arany (Class Gold) F\u0151tan\xfas\xedtv\xe1ny O=NetLock Kft. OU=Tan\xfas\xedtv\xe1nykiad\xf3k (Certification Services)
-# Label: "NetLock Arany (Class Gold) F\u0151tan\xfas\xedtv\xe1ny"
-# Serial: 80544274841616
-# MD5 Fingerprint: c5:a1:b7:ff:73:dd:d6:d7:34:32:18:df:fc:3c:ad:88
-# SHA1 Fingerprint: 06:08:3f:59:3f:15:a1:04:a0:69:a4:6b:a9:03:d0:06:b7:97:09:91
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=Staat der Nederlanden Root CA - G2 O=Staat der Nederlanden
-# Subject: CN=Staat der Nederlanden Root CA - G2 O=Staat der Nederlanden
-# Label: "Staat der Nederlanden Root CA - G2"
-# Serial: 10000012
-# MD5 Fingerprint: 7c:a5:0f:f8:5b:9a:7d:6d:30:ae:54:5a:e3:42:a2:8a
-# SHA1 Fingerprint: 59:af:82:79:91:86:c7:b4:75:07:cb:cf:03:57:46:eb:04:dd:b7:16
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=Hongkong Post Root CA 1 O=Hongkong Post
-# Subject: CN=Hongkong Post Root CA 1 O=Hongkong Post
-# Label: "Hongkong Post Root CA 1"
-# Serial: 1000
-# MD5 Fingerprint: a8:0d:6f:39:78:b9:43:6d:77:42:6d:98:5a:cc:23:ca
-# SHA1 Fingerprint: d6:da:a8:20:8d:09:d2:15:4d:24:b5:2f:cb:34:6e:b2:58:b2:8a:58
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=SecureSign RootCA11 O=Japan Certification Services, Inc.
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=GlobalSign O=GlobalSign OU=GlobalSign Root CA - R3
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-# Issuer: CN=Autoridad de Certificacion Firmaprofesional CIF A62634068
-# Subject: CN=Autoridad de Certificacion Firmaprofesional CIF A62634068
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-# Issuer: CN=Izenpe.com O=IZENPE S.A.
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-# Label: "Izenpe.com"
-# Serial: 917563065490389241595536686991402621
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=Chambers of Commerce Root - 2008 O=AC Camerfirma S.A.
-# Subject: CN=Chambers of Commerce Root - 2008 O=AC Camerfirma S.A.
-# Label: "Chambers of Commerce Root - 2008"
-# Serial: 11806822484801597146
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------BEGIN CERTIFICATE-----
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=AffirmTrust Networking O=AffirmTrust
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-# Label: "AffirmTrust Networking"
-# Serial: 8957382827206547757
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=AffirmTrust Premium O=AffirmTrust
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=AffirmTrust Premium ECC O=AffirmTrust
-# Subject: CN=AffirmTrust Premium ECC O=AffirmTrust
-# Label: "AffirmTrust Premium ECC"
-# Serial: 8401224907861490260
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------BEGIN CERTIFICATE-----
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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------BEGIN CERTIFICATE-----
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=EE Certification Centre Root CA O=AS Sertifitseerimiskeskus
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-# Issuer: CN=D-TRUST Root Class 3 CA 2 2009 O=D-Trust GmbH
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-# Serial: 623603
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=D-TRUST Root Class 3 CA 2 EV 2009 O=D-Trust GmbH
-# Subject: CN=D-TRUST Root Class 3 CA 2 EV 2009 O=D-Trust GmbH
-# Label: "D-TRUST Root Class 3 CA 2 EV 2009"
-# Serial: 623604
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=CA Disig Root R2 O=Disig a.s.
-# Subject: CN=CA Disig Root R2 O=Disig a.s.
-# Label: "CA Disig Root R2"
-# Serial: 10572350602393338211
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------BEGIN CERTIFICATE-----
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=TWCA Global Root CA O=TAIWAN-CA OU=Root CA
-# Subject: CN=TWCA Global Root CA O=TAIWAN-CA OU=Root CA
-# Label: "TWCA Global Root CA"
-# Serial: 3262
-# MD5 Fingerprint: f9:03:7e:cf:e6:9e:3c:73:7a:2a:90:07:69:ff:2b:96
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=TeliaSonera Root CA v1 O=TeliaSonera
-# Subject: CN=TeliaSonera Root CA v1 O=TeliaSonera
-# Label: "TeliaSonera Root CA v1"
-# Serial: 199041966741090107964904287217786801558
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=E-Tugra Certification Authority O=E-Tu\u011fra EBG Bili\u015fim Teknolojileri ve Hizmetleri A.\u015e. OU=E-Tugra Sertifikasyon Merkezi
-# Subject: CN=E-Tugra Certification Authority O=E-Tu\u011fra EBG Bili\u015fim Teknolojileri ve Hizmetleri A.\u015e. OU=E-Tugra Sertifikasyon Merkezi
-# Label: "E-Tugra Certification Authority"
-# Serial: 7667447206703254355
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=T-TeleSec GlobalRoot Class 2 O=T-Systems Enterprise Services GmbH OU=T-Systems Trust Center
-# Subject: CN=T-TeleSec GlobalRoot Class 2 O=T-Systems Enterprise Services GmbH OU=T-Systems Trust Center
-# Label: "T-TeleSec GlobalRoot Class 2"
-# Serial: 1
-# MD5 Fingerprint: 2b:9b:9e:e4:7b:6c:1f:00:72:1a:cc:c1:77:79:df:6a
-# SHA1 Fingerprint: 59:0d:2d:7d:88:4f:40:2e:61:7e:a5:62:32:17:65:cf:17:d8:94:e9
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=Atos TrustedRoot 2011 O=Atos
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-# Label: "Atos TrustedRoot 2011"
-# Serial: 6643877497813316402
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=QuoVadis Root CA 1 G3 O=QuoVadis Limited
-# Subject: CN=QuoVadis Root CA 1 G3 O=QuoVadis Limited
-# Label: "QuoVadis Root CA 1 G3"
-# Serial: 687049649626669250736271037606554624078720034195
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=QuoVadis Root CA 2 G3 O=QuoVadis Limited
-# Subject: CN=QuoVadis Root CA 2 G3 O=QuoVadis Limited
-# Label: "QuoVadis Root CA 2 G3"
-# Serial: 390156079458959257446133169266079962026824725800
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=QuoVadis Root CA 3 G3 O=QuoVadis Limited
-# Subject: CN=QuoVadis Root CA 3 G3 O=QuoVadis Limited
-# Label: "QuoVadis Root CA 3 G3"
-# Serial: 268090761170461462463995952157327242137089239581
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=DigiCert Assured ID Root G2 O=DigiCert Inc OU=www.digicert.com
-# Subject: CN=DigiCert Assured ID Root G2 O=DigiCert Inc OU=www.digicert.com
-# Label: "DigiCert Assured ID Root G2"
-# Serial: 15385348160840213938643033620894905419
-# MD5 Fingerprint: 92:38:b9:f8:63:24:82:65:2c:57:33:e6:fe:81:8f:9d
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=DigiCert Assured ID Root G3 O=DigiCert Inc OU=www.digicert.com
-# Subject: CN=DigiCert Assured ID Root G3 O=DigiCert Inc OU=www.digicert.com
-# Label: "DigiCert Assured ID Root G3"
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=DigiCert Global Root G2 O=DigiCert Inc OU=www.digicert.com
-# Subject: CN=DigiCert Global Root G2 O=DigiCert Inc OU=www.digicert.com
-# Label: "DigiCert Global Root G2"
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=DigiCert Global Root G3 O=DigiCert Inc OU=www.digicert.com
-# Subject: CN=DigiCert Global Root G3 O=DigiCert Inc OU=www.digicert.com
-# Label: "DigiCert Global Root G3"
-# Serial: 7089244469030293291760083333884364146
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=DigiCert Trusted Root G4 O=DigiCert Inc OU=www.digicert.com
-# Subject: CN=DigiCert Trusted Root G4 O=DigiCert Inc OU=www.digicert.com
-# Label: "DigiCert Trusted Root G4"
-# Serial: 7451500558977370777930084869016614236
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------BEGIN CERTIFICATE-----
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-
-# Issuer: CN=COMODO RSA Certification Authority O=COMODO CA Limited
-# Subject: CN=COMODO RSA Certification Authority O=COMODO CA Limited
-# Label: "COMODO RSA Certification Authority"
-# Serial: 101909084537582093308941363524873193117
-# MD5 Fingerprint: 1b:31:b0:71:40:36:cc:14:36:91:ad:c4:3e:fd:ec:18
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=USERTrust RSA Certification Authority O=The USERTRUST Network
-# Subject: CN=USERTrust RSA Certification Authority O=The USERTRUST Network
-# Label: "USERTrust RSA Certification Authority"
-# Serial: 2645093764781058787591871645665788717
-# MD5 Fingerprint: 1b:fe:69:d1:91:b7:19:33:a3:72:a8:0f:e1:55:e5:b5
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=USERTrust ECC Certification Authority O=The USERTRUST Network
-# Subject: CN=USERTrust ECC Certification Authority O=The USERTRUST Network
-# Label: "USERTrust ECC Certification Authority"
-# Serial: 123013823720199481456569720443997572134
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=GlobalSign O=GlobalSign OU=GlobalSign ECC Root CA - R4
-# Subject: CN=GlobalSign O=GlobalSign OU=GlobalSign ECC Root CA - R4
-# Label: "GlobalSign ECC Root CA - R4"
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=GlobalSign O=GlobalSign OU=GlobalSign ECC Root CA - R5
-# Subject: CN=GlobalSign O=GlobalSign OU=GlobalSign ECC Root CA - R5
-# Label: "GlobalSign ECC Root CA - R5"
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=Staat der Nederlanden Root CA - G3 O=Staat der Nederlanden
-# Subject: CN=Staat der Nederlanden Root CA - G3 O=Staat der Nederlanden
-# Label: "Staat der Nederlanden Root CA - G3"
-# Serial: 10003001
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=Staat der Nederlanden EV Root CA O=Staat der Nederlanden
-# Subject: CN=Staat der Nederlanden EV Root CA O=Staat der Nederlanden
-# Label: "Staat der Nederlanden EV Root CA"
-# Serial: 10000013
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=IdenTrust Commercial Root CA 1 O=IdenTrust
-# Subject: CN=IdenTrust Commercial Root CA 1 O=IdenTrust
-# Label: "IdenTrust Commercial Root CA 1"
-# Serial: 13298821034946342390520003877796839426
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------BEGIN CERTIFICATE-----
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-# Label: "AC RAIZ FNMT-RCM"
-# Serial: 485876308206448804701554682760554759
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=Amazon Root CA 1 O=Amazon
-# Subject: CN=Amazon Root CA 1 O=Amazon
-# Label: "Amazon Root CA 1"
-# Serial: 143266978916655856878034712317230054538369994
-# MD5 Fingerprint: 43:c6:bf:ae:ec:fe:ad:2f:18:c6:88:68:30:fc:c8:e6
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=Amazon Root CA 2 O=Amazon
-# Subject: CN=Amazon Root CA 2 O=Amazon
-# Label: "Amazon Root CA 2"
-# Serial: 143266982885963551818349160658925006970653239
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=Amazon Root CA 3 O=Amazon
-# Subject: CN=Amazon Root CA 3 O=Amazon
-# Label: "Amazon Root CA 3"
-# Serial: 143266986699090766294700635381230934788665930
-# MD5 Fingerprint: a0:d4:ef:0b:f7:b5:d8:49:95:2a:ec:f5:c4:fc:81:87
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=Amazon Root CA 4 O=Amazon
-# Subject: CN=Amazon Root CA 4 O=Amazon
-# Label: "Amazon Root CA 4"
-# Serial: 143266989758080763974105200630763877849284878
-# MD5 Fingerprint: 89:bc:27:d5:eb:17:8d:06:6a:69:d5:fd:89:47:b4:cd
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
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-# Issuer: CN=LuxTrust Global Root 2 O=LuxTrust S.A.
-# Subject: CN=LuxTrust Global Root 2 O=LuxTrust S.A.
-# Label: "LuxTrust Global Root 2"
-# Serial: 59914338225734147123941058376788110305822489521
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------BEGIN CERTIFICATE-----
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-# Subject: CN=TUBITAK Kamu SM SSL Kok Sertifikasi - Surum 1 O=Turkiye Bilimsel ve Teknolojik Arastirma Kurumu - TUBITAK OU=Kamu Sertifikasyon Merkezi - Kamu SM
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-# Serial: 1
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=GDCA TrustAUTH R5 ROOT O=GUANG DONG CERTIFICATE AUTHORITY CO.,LTD.
-# Subject: CN=GDCA TrustAUTH R5 ROOT O=GUANG DONG CERTIFICATE AUTHORITY CO.,LTD.
-# Label: "GDCA TrustAUTH R5 ROOT"
-# Serial: 9009899650740120186
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-# Issuer: CN=TrustCor RootCert CA-1 O=TrustCor Systems S. de R.L. OU=TrustCor Certificate Authority
-# Subject: CN=TrustCor RootCert CA-1 O=TrustCor Systems S. de R.L. OU=TrustCor Certificate Authority
-# Label: "TrustCor RootCert CA-1"
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=TrustCor RootCert CA-2 O=TrustCor Systems S. de R.L. OU=TrustCor Certificate Authority
-# Subject: CN=TrustCor RootCert CA-2 O=TrustCor Systems S. de R.L. OU=TrustCor Certificate Authority
-# Label: "TrustCor RootCert CA-2"
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------BEGIN CERTIFICATE-----
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-# Issuer: CN=TrustCor ECA-1 O=TrustCor Systems S. de R.L. OU=TrustCor Certificate Authority
-# Subject: CN=TrustCor ECA-1 O=TrustCor Systems S. de R.L. OU=TrustCor Certificate Authority
-# Label: "TrustCor ECA-1"
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=SSL.com Root Certification Authority RSA O=SSL Corporation
-# Subject: CN=SSL.com Root Certification Authority RSA O=SSL Corporation
-# Label: "SSL.com Root Certification Authority RSA"
-# Serial: 8875640296558310041
-# MD5 Fingerprint: 86:69:12:c0:70:f1:ec:ac:ac:c2:d5:bc:a5:5b:a1:29
-# SHA1 Fingerprint: b7:ab:33:08:d1:ea:44:77:ba:14:80:12:5a:6f:bd:a9:36:49:0c:bb
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=SSL.com Root Certification Authority ECC O=SSL Corporation
-# Subject: CN=SSL.com Root Certification Authority ECC O=SSL Corporation
-# Label: "SSL.com Root Certification Authority ECC"
-# Serial: 8495723813297216424
-# MD5 Fingerprint: 2e:da:e4:39:7f:9c:8f:37:d1:70:9f:26:17:51:3a:8e
-# SHA1 Fingerprint: c3:19:7c:39:24:e6:54:af:1b:c4:ab:20:95:7a:e2:c3:0e:13:02:6a
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=SSL.com EV Root Certification Authority RSA R2 O=SSL Corporation
-# Subject: CN=SSL.com EV Root Certification Authority RSA R2 O=SSL Corporation
-# Label: "SSL.com EV Root Certification Authority RSA R2"
-# Serial: 6248227494352943350
-# MD5 Fingerprint: e1:1e:31:58:1a:ae:54:53:02:f6:17:6a:11:7b:4d:95
-# SHA1 Fingerprint: 74:3a:f0:52:9b:d0:32:a0:f4:4a:83:cd:d4:ba:a9:7b:7c:2e:c4:9a
-# SHA256 Fingerprint: 2e:7b:f1:6c:c2:24:85:a7:bb:e2:aa:86:96:75:07:61:b0:ae:39:be:3b:2f:e9:d0:cc:6d:4e:f7:34:91:42:5c
------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=SSL.com EV Root Certification Authority ECC O=SSL Corporation
-# Subject: CN=SSL.com EV Root Certification Authority ECC O=SSL Corporation
-# Label: "SSL.com EV Root Certification Authority ECC"
-# Serial: 3182246526754555285
-# MD5 Fingerprint: 59:53:22:65:83:42:01:54:c0:ce:42:b9:5a:7c:f2:90
-# SHA1 Fingerprint: 4c:dd:51:a3:d1:f5:20:32:14:b0:c6:c5:32:23:03:91:c7:46:42:6d
-# SHA256 Fingerprint: 22:a2:c1:f7:bd:ed:70:4c:c1:e7:01:b5:f4:08:c3:10:88:0f:e9:56:b5:de:2a:4a:44:f9:9c:87:3a:25:a7:c8
------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=GlobalSign O=GlobalSign OU=GlobalSign Root CA - R6
-# Subject: CN=GlobalSign O=GlobalSign OU=GlobalSign Root CA - R6
-# Label: "GlobalSign Root CA - R6"
-# Serial: 1417766617973444989252670301619537
-# MD5 Fingerprint: 4f:dd:07:e4:d4:22:64:39:1e:0c:37:42:ea:d1:c6:ae
-# SHA1 Fingerprint: 80:94:64:0e:b5:a7:a1:ca:11:9c:1f:dd:d5:9f:81:02:63:a7:fb:d1
-# SHA256 Fingerprint: 2c:ab:ea:fe:37:d0:6c:a2:2a:ba:73:91:c0:03:3d:25:98:29:52:c4:53:64:73:49:76:3a:3a:b5:ad:6c:cf:69
------BEGIN CERTIFICATE-----
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-# Serial: 146587175971765017618439757810265552097
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-# Issuer: CN=GTS Root R2 O=Google Trust Services LLC
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-# Label: "GTS Root R2"
-# Serial: 146587176055767053814479386953112547951
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-# Issuer: CN=GTS Root R3 O=Google Trust Services LLC
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-# Label: "GTS Root R3"
-# Serial: 146587176140553309517047991083707763997
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------BEGIN CERTIFICATE-----
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-UB+K+wb1whnw0A==
------END CERTIFICATE-----
-
-# Issuer: CN=UCA Extended Validation Root O=UniTrust
-# Subject: CN=UCA Extended Validation Root O=UniTrust
-# Label: "UCA Extended Validation Root"
-# Serial: 106100277556486529736699587978573607008
-# MD5 Fingerprint: a1:f3:5f:43:c6:34:9b:da:bf:8c:7e:05:53:ad:96:e2
-# SHA1 Fingerprint: a3:a1:b0:6f:24:61:23:4a:e3:36:a5:c2:37:fc:a6:ff:dd:f0:d7:3a
-# SHA256 Fingerprint: d4:3a:f9:b3:54:73:75:5c:96:84:fc:06:d7:d8:cb:70:ee:5c:28:e7:73:fb:29:4e:b4:1e:e7:17:22:92:4d:24
------BEGIN CERTIFICATE-----
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-fjKaiJUINlK73nZfdklJrX+9ZSCyycErdhh2n1ax
------END CERTIFICATE-----
-
-# Issuer: CN=Certigna Root CA O=Dhimyotis OU=0002 48146308100036
-# Subject: CN=Certigna Root CA O=Dhimyotis OU=0002 48146308100036
-# Label: "Certigna Root CA"
-# Serial: 269714418870597844693661054334862075617
-# MD5 Fingerprint: 0e:5c:30:62:27:eb:5b:bc:d7:ae:62:ba:e9:d5:df:77
-# SHA1 Fingerprint: 2d:0d:52:14:ff:9e:ad:99:24:01:74:20:47:6e:6c:85:27:27:f5:43
-# SHA256 Fingerprint: d4:8d:3d:23:ee:db:50:a4:59:e5:51:97:60:1c:27:77:4b:9d:7b:18:c9:4d:5a:05:95:11:a1:02:50:b9:31:68
------BEGIN CERTIFICATE-----
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-3kAP+HwV96LOPNdeE4yBFxgX0b3xdxA61GU5wSesVywlVP+i2k+KYTlerj1KjL0=
------END CERTIFICATE-----
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/certifi/core.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/certifi/core.py
deleted file mode 100644
index 2d02ea4..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/certifi/core.py
+++ /dev/null
@@ -1,20 +0,0 @@
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-
-"""
-certifi.py
-~~~~~~~~~~
-
-This module returns the installation location of cacert.pem.
-"""
-import os
-
-
-def where():
-    f = os.path.dirname(__file__)
-
-    return os.path.join(f, 'cacert.pem')
-
-
-if __name__ == '__main__':
-    print(where())
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/__init__.py
deleted file mode 100644
index 0f9f820..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/__init__.py
+++ /dev/null
@@ -1,39 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-
-from .compat import PY2, PY3
-from .universaldetector import UniversalDetector
-from .version import __version__, VERSION
-
-
-def detect(byte_str):
-    """
-    Detect the encoding of the given byte string.
-
-    :param byte_str:     The byte sequence to examine.
-    :type byte_str:      ``bytes`` or ``bytearray``
-    """
-    if not isinstance(byte_str, bytearray):
-        if not isinstance(byte_str, bytes):
-            raise TypeError('Expected object of type bytes or bytearray, got: '
-                            '{0}'.format(type(byte_str)))
-        else:
-            byte_str = bytearray(byte_str)
-    detector = UniversalDetector()
-    detector.feed(byte_str)
-    return detector.close()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/big5freq.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/big5freq.py
deleted file mode 100644
index 38f3251..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/big5freq.py
+++ /dev/null
@@ -1,386 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-# Big5 frequency table
-# by Taiwan's Mandarin Promotion Council
-# <http://www.edu.tw:81/mandr/>
-#
-# 128  --> 0.42261
-# 256  --> 0.57851
-# 512  --> 0.74851
-# 1024 --> 0.89384
-# 2048 --> 0.97583
-#
-# Ideal Distribution Ratio = 0.74851/(1-0.74851) =2.98
-# Random Distribution Ration = 512/(5401-512)=0.105
-#
-# Typical Distribution Ratio about 25% of Ideal one, still much higher than RDR
-
-BIG5_TYPICAL_DISTRIBUTION_RATIO = 0.75
-
-#Char to FreqOrder table
-BIG5_TABLE_SIZE = 5376
-
-BIG5_CHAR_TO_FREQ_ORDER = (
-   1,1801,1506, 255,1431, 198,   9,  82,   6,5008, 177, 202,3681,1256,2821, 110, #   16
-3814,  33,3274, 261,  76,  44,2114,  16,2946,2187,1176, 659,3971,  26,3451,2653, #   32
-1198,3972,3350,4202, 410,2215, 302, 590, 361,1964,   8, 204,  58,4510,5009,1932, #   48
-  63,5010,5011, 317,1614,  75, 222, 159,4203,2417,1480,5012,3555,3091, 224,2822, #   64
-3682,   3,  10,3973,1471,  29,2787,1135,2866,1940, 873, 130,3275,1123, 312,5013, #   80
-4511,2052, 507, 252, 682,5014, 142,1915, 124, 206,2947,  34,3556,3204,  64, 604, #   96
-5015,2501,1977,1978, 155,1991, 645, 641,1606,5016,3452, 337,  72, 406,5017,  80, #  112
- 630, 238,3205,1509, 263, 939,1092,2654, 756,1440,1094,3453, 449,  69,2987, 591, #  128
- 179,2096, 471, 115,2035,1844,  60,  50,2988, 134, 806,1869, 734,2036,3454, 180, #  144
- 995,1607, 156, 537,2907, 688,5018, 319,1305, 779,2145, 514,2379, 298,4512, 359, #  160
-2502,  90,2716,1338, 663,  11, 906,1099,2553,  20,2441, 182, 532,1716,5019, 732, #  176
-1376,4204,1311,1420,3206,  25,2317,1056, 113, 399, 382,1950, 242,3455,2474, 529, #  192
-3276, 475,1447,3683,5020, 117,  21, 656, 810,1297,2300,2334,3557,5021, 126,4205, #  208
- 706, 456, 150, 613,4513,  71,1118,2037,4206, 145,3092,  85, 835, 486,2115,1246, #  224
-1426, 428, 727,1285,1015, 800, 106, 623, 303,1281,5022,2128,2359, 347,3815, 221, #  240
-3558,3135,5023,1956,1153,4207,  83, 296,1199,3093, 192, 624,  93,5024, 822,1898, #  256
-2823,3136, 795,2065, 991,1554,1542,1592,  27,  43,2867, 859, 139,1456, 860,4514, #  272
- 437, 712,3974, 164,2397,3137, 695, 211,3037,2097, 195,3975,1608,3559,3560,3684, #  288
-3976, 234, 811,2989,2098,3977,2233,1441,3561,1615,2380, 668,2077,1638, 305, 228, #  304
-1664,4515, 467, 415,5025, 262,2099,1593, 239, 108, 300, 200,1033, 512,1247,2078, #  320
-5026,5027,2176,3207,3685,2682, 593, 845,1062,3277,  88,1723,2038,3978,1951, 212, #  336
- 266, 152, 149, 468,1899,4208,4516,  77, 187,5028,3038,  37,   5,2990,5029,3979, #  352
-5030,5031,  39,2524,4517,2908,3208,2079,  55, 148,  74,4518, 545, 483,1474,1029, #  368
-1665, 217,1870,1531,3138,1104,2655,4209,  24, 172,3562, 900,3980,3563,3564,4519, #  384
-  32,1408,2824,1312, 329, 487,2360,2251,2717, 784,2683,   4,3039,3351,1427,1789, #  400
- 188, 109, 499,5032,3686,1717,1790, 888,1217,3040,4520,5033,3565,5034,3352,1520, #  416
-3687,3981, 196,1034, 775,5035,5036, 929,1816, 249, 439,  38,5037,1063,5038, 794, #  432
-3982,1435,2301,  46, 178,3278,2066,5039,2381,5040, 214,1709,4521, 804,  35, 707, #  448
- 324,3688,1601,2554, 140, 459,4210,5041,5042,1365, 839, 272, 978,2262,2580,3456, #  464
-2129,1363,3689,1423, 697, 100,3094,  48,  70,1231, 495,3139,2196,5043,1294,5044, #  480
-2080, 462, 586,1042,3279, 853, 256, 988, 185,2382,3457,1698, 434,1084,5045,3458, #  496
- 314,2625,2788,4522,2335,2336, 569,2285, 637,1817,2525, 757,1162,1879,1616,3459, #  512
- 287,1577,2116, 768,4523,1671,2868,3566,2526,1321,3816, 909,2418,5046,4211, 933, #  528
-3817,4212,2053,2361,1222,4524, 765,2419,1322, 786,4525,5047,1920,1462,1677,2909, #  544
-1699,5048,4526,1424,2442,3140,3690,2600,3353,1775,1941,3460,3983,4213, 309,1369, #  560
-1130,2825, 364,2234,1653,1299,3984,3567,3985,3986,2656, 525,1085,3041, 902,2001, #  576
-1475, 964,4527, 421,1845,1415,1057,2286, 940,1364,3141, 376,4528,4529,1381,   7, #  592
-2527, 983,2383, 336,1710,2684,1846, 321,3461, 559,1131,3042,2752,1809,1132,1313, #  608
- 265,1481,1858,5049, 352,1203,2826,3280, 167,1089, 420,2827, 776, 792,1724,3568, #  624
-4214,2443,3281,5050,4215,5051, 446, 229, 333,2753, 901,3818,1200,1557,4530,2657, #  640
-1921, 395,2754,2685,3819,4216,1836, 125, 916,3209,2626,4531,5052,5053,3820,5054, #  656
-5055,5056,4532,3142,3691,1133,2555,1757,3462,1510,2318,1409,3569,5057,2146, 438, #  672
-2601,2910,2384,3354,1068, 958,3043, 461, 311,2869,2686,4217,1916,3210,4218,1979, #  688
- 383, 750,2755,2627,4219, 274, 539, 385,1278,1442,5058,1154,1965, 384, 561, 210, #  704
-  98,1295,2556,3570,5059,1711,2420,1482,3463,3987,2911,1257, 129,5060,3821, 642, #  720
- 523,2789,2790,2658,5061, 141,2235,1333,  68, 176, 441, 876, 907,4220, 603,2602, #  736
- 710, 171,3464, 404, 549,  18,3143,2398,1410,3692,1666,5062,3571,4533,2912,4534, #  752
-5063,2991, 368,5064, 146, 366,  99, 871,3693,1543, 748, 807,1586,1185,  22,2263, #  768
- 379,3822,3211,5065,3212, 505,1942,2628,1992,1382,2319,5066, 380,2362, 218, 702, #  784
-1818,1248,3465,3044,3572,3355,3282,5067,2992,3694, 930,3283,3823,5068,  59,5069, #  800
- 585, 601,4221, 497,3466,1112,1314,4535,1802,5070,1223,1472,2177,5071, 749,1837, #  816
- 690,1900,3824,1773,3988,1476, 429,1043,1791,2236,2117, 917,4222, 447,1086,1629, #  832
-5072, 556,5073,5074,2021,1654, 844,1090, 105, 550, 966,1758,2828,1008,1783, 686, #  848
-1095,5075,2287, 793,1602,5076,3573,2603,4536,4223,2948,2302,4537,3825, 980,2503, #  864
- 544, 353, 527,4538, 908,2687,2913,5077, 381,2629,1943,1348,5078,1341,1252, 560, #  880
-3095,5079,3467,2870,5080,2054, 973, 886,2081, 143,4539,5081,5082, 157,3989, 496, #  896
-4224,  57, 840, 540,2039,4540,4541,3468,2118,1445, 970,2264,1748,1966,2082,4225, #  912
-3144,1234,1776,3284,2829,3695, 773,1206,2130,1066,2040,1326,3990,1738,1725,4226, #  928
- 279,3145,  51,1544,2604, 423,1578,2131,2067, 173,4542,1880,5083,5084,1583, 264, #  944
- 610,3696,4543,2444, 280, 154,5085,5086,5087,1739, 338,1282,3096, 693,2871,1411, #  960
-1074,3826,2445,5088,4544,5089,5090,1240, 952,2399,5091,2914,1538,2688, 685,1483, #  976
-4227,2475,1436, 953,4228,2055,4545, 671,2400,  79,4229,2446,3285, 608, 567,2689, #  992
-3469,4230,4231,1691, 393,1261,1792,2401,5092,4546,5093,5094,5095,5096,1383,1672, # 1008
-3827,3213,1464, 522,1119, 661,1150, 216, 675,4547,3991,1432,3574, 609,4548,2690, # 1024
-2402,5097,5098,5099,4232,3045,   0,5100,2476, 315, 231,2447, 301,3356,4549,2385, # 1040
-5101, 233,4233,3697,1819,4550,4551,5102,  96,1777,1315,2083,5103, 257,5104,1810, # 1056
-3698,2718,1139,1820,4234,2022,1124,2164,2791,1778,2659,5105,3097, 363,1655,3214, # 1072
-5106,2993,5107,5108,5109,3992,1567,3993, 718, 103,3215, 849,1443, 341,3357,2949, # 1088
-1484,5110,1712, 127,  67, 339,4235,2403, 679,1412, 821,5111,5112, 834, 738, 351, # 1104
-2994,2147, 846, 235,1497,1881, 418,1993,3828,2719, 186,1100,2148,2756,3575,1545, # 1120
-1355,2950,2872,1377, 583,3994,4236,2581,2995,5113,1298,3699,1078,2557,3700,2363, # 1136
-  78,3829,3830, 267,1289,2100,2002,1594,4237, 348, 369,1274,2197,2178,1838,4552, # 1152
-1821,2830,3701,2757,2288,2003,4553,2951,2758, 144,3358, 882,4554,3995,2759,3470, # 1168
-4555,2915,5114,4238,1726, 320,5115,3996,3046, 788,2996,5116,2831,1774,1327,2873, # 1184
-3997,2832,5117,1306,4556,2004,1700,3831,3576,2364,2660, 787,2023, 506, 824,3702, # 1200
- 534, 323,4557,1044,3359,2024,1901, 946,3471,5118,1779,1500,1678,5119,1882,4558, # 1216
- 165, 243,4559,3703,2528, 123, 683,4239, 764,4560,  36,3998,1793, 589,2916, 816, # 1232
- 626,1667,3047,2237,1639,1555,1622,3832,3999,5120,4000,2874,1370,1228,1933, 891, # 1248
-2084,2917, 304,4240,5121, 292,2997,2720,3577, 691,2101,4241,1115,4561, 118, 662, # 1264
-5122, 611,1156, 854,2386,1316,2875,   2, 386, 515,2918,5123,5124,3286, 868,2238, # 1280
-1486, 855,2661, 785,2216,3048,5125,1040,3216,3578,5126,3146, 448,5127,1525,5128, # 1296
-2165,4562,5129,3833,5130,4242,2833,3579,3147, 503, 818,4001,3148,1568, 814, 676, # 1312
-1444, 306,1749,5131,3834,1416,1030, 197,1428, 805,2834,1501,4563,5132,5133,5134, # 1328
-1994,5135,4564,5136,5137,2198,  13,2792,3704,2998,3149,1229,1917,5138,3835,2132, # 1344
-5139,4243,4565,2404,3580,5140,2217,1511,1727,1120,5141,5142, 646,3836,2448, 307, # 1360
-5143,5144,1595,3217,5145,5146,5147,3705,1113,1356,4002,1465,2529,2530,5148, 519, # 1376
-5149, 128,2133,  92,2289,1980,5150,4003,1512, 342,3150,2199,5151,2793,2218,1981, # 1392
-3360,4244, 290,1656,1317, 789, 827,2365,5152,3837,4566, 562, 581,4004,5153, 401, # 1408
-4567,2252,  94,4568,5154,1399,2794,5155,1463,2025,4569,3218,1944,5156, 828,1105, # 1424
-4245,1262,1394,5157,4246, 605,4570,5158,1784,2876,5159,2835, 819,2102, 578,2200, # 1440
-2952,5160,1502, 436,3287,4247,3288,2836,4005,2919,3472,3473,5161,2721,2320,5162, # 1456
-5163,2337,2068,  23,4571, 193, 826,3838,2103, 699,1630,4248,3098, 390,1794,1064, # 1472
-3581,5164,1579,3099,3100,1400,5165,4249,1839,1640,2877,5166,4572,4573, 137,4250, # 1488
- 598,3101,1967, 780, 104, 974,2953,5167, 278, 899, 253, 402, 572, 504, 493,1339, # 1504
-5168,4006,1275,4574,2582,2558,5169,3706,3049,3102,2253, 565,1334,2722, 863,  41, # 1520
-5170,5171,4575,5172,1657,2338,  19, 463,2760,4251, 606,5173,2999,3289,1087,2085, # 1536
-1323,2662,3000,5174,1631,1623,1750,4252,2691,5175,2878, 791,2723,2663,2339, 232, # 1552
-2421,5176,3001,1498,5177,2664,2630, 755,1366,3707,3290,3151,2026,1609, 119,1918, # 1568
-3474, 862,1026,4253,5178,4007,3839,4576,4008,4577,2265,1952,2477,5179,1125, 817, # 1584
-4254,4255,4009,1513,1766,2041,1487,4256,3050,3291,2837,3840,3152,5180,5181,1507, # 1600
-5182,2692, 733,  40,1632,1106,2879, 345,4257, 841,2531, 230,4578,3002,1847,3292, # 1616
-3475,5183,1263, 986,3476,5184, 735, 879, 254,1137, 857, 622,1300,1180,1388,1562, # 1632
-4010,4011,2954, 967,2761,2665,1349, 592,2134,1692,3361,3003,1995,4258,1679,4012, # 1648
-1902,2188,5185, 739,3708,2724,1296,1290,5186,4259,2201,2202,1922,1563,2605,2559, # 1664
-1871,2762,3004,5187, 435,5188, 343,1108, 596,  17,1751,4579,2239,3477,3709,5189, # 1680
-4580, 294,3582,2955,1693, 477, 979, 281,2042,3583, 643,2043,3710,2631,2795,2266, # 1696
-1031,2340,2135,2303,3584,4581, 367,1249,2560,5190,3585,5191,4582,1283,3362,2005, # 1712
- 240,1762,3363,4583,4584, 836,1069,3153, 474,5192,2149,2532, 268,3586,5193,3219, # 1728
-1521,1284,5194,1658,1546,4260,5195,3587,3588,5196,4261,3364,2693,1685,4262, 961, # 1744
-1673,2632, 190,2006,2203,3841,4585,4586,5197, 570,2504,3711,1490,5198,4587,2633, # 1760
-3293,1957,4588, 584,1514, 396,1045,1945,5199,4589,1968,2449,5200,5201,4590,4013, # 1776
- 619,5202,3154,3294, 215,2007,2796,2561,3220,4591,3221,4592, 763,4263,3842,4593, # 1792
-5203,5204,1958,1767,2956,3365,3712,1174, 452,1477,4594,3366,3155,5205,2838,1253, # 1808
-2387,2189,1091,2290,4264, 492,5206, 638,1169,1825,2136,1752,4014, 648, 926,1021, # 1824
-1324,4595, 520,4596, 997, 847,1007, 892,4597,3843,2267,1872,3713,2405,1785,4598, # 1840
-1953,2957,3103,3222,1728,4265,2044,3714,4599,2008,1701,3156,1551,  30,2268,4266, # 1856
-5207,2027,4600,3589,5208, 501,5209,4267, 594,3478,2166,1822,3590,3479,3591,3223, # 1872
- 829,2839,4268,5210,1680,3157,1225,4269,5211,3295,4601,4270,3158,2341,5212,4602, # 1888
-4271,5213,4015,4016,5214,1848,2388,2606,3367,5215,4603, 374,4017, 652,4272,4273, # 1904
- 375,1140, 798,5216,5217,5218,2366,4604,2269, 546,1659, 138,3051,2450,4605,5219, # 1920
-2254, 612,1849, 910, 796,3844,1740,1371, 825,3845,3846,5220,2920,2562,5221, 692, # 1936
- 444,3052,2634, 801,4606,4274,5222,1491, 244,1053,3053,4275,4276, 340,5223,4018, # 1952
-1041,3005, 293,1168,  87,1357,5224,1539, 959,5225,2240, 721, 694,4277,3847, 219, # 1968
-1478, 644,1417,3368,2666,1413,1401,1335,1389,4019,5226,5227,3006,2367,3159,1826, # 1984
- 730,1515, 184,2840,  66,4607,5228,1660,2958, 246,3369, 378,1457, 226,3480, 975, # 2000
-4020,2959,1264,3592, 674, 696,5229, 163,5230,1141,2422,2167, 713,3593,3370,4608, # 2016
-4021,5231,5232,1186,  15,5233,1079,1070,5234,1522,3224,3594, 276,1050,2725, 758, # 2032
-1126, 653,2960,3296,5235,2342, 889,3595,4022,3104,3007, 903,1250,4609,4023,3481, # 2048
-3596,1342,1681,1718, 766,3297, 286,  89,2961,3715,5236,1713,5237,2607,3371,3008, # 2064
-5238,2962,2219,3225,2880,5239,4610,2505,2533, 181, 387,1075,4024, 731,2190,3372, # 2080
-5240,3298, 310, 313,3482,2304, 770,4278,  54,3054, 189,4611,3105,3848,4025,5241, # 2096
-1230,1617,1850, 355,3597,4279,4612,3373, 111,4280,3716,1350,3160,3483,3055,4281, # 2112
-2150,3299,3598,5242,2797,4026,4027,3009, 722,2009,5243,1071, 247,1207,2343,2478, # 2128
-1378,4613,2010, 864,1437,1214,4614, 373,3849,1142,2220, 667,4615, 442,2763,2563, # 2144
-3850,4028,1969,4282,3300,1840, 837, 170,1107, 934,1336,1883,5244,5245,2119,4283, # 2160
-2841, 743,1569,5246,4616,4284, 582,2389,1418,3484,5247,1803,5248, 357,1395,1729, # 2176
-3717,3301,2423,1564,2241,5249,3106,3851,1633,4617,1114,2086,4285,1532,5250, 482, # 2192
-2451,4618,5251,5252,1492, 833,1466,5253,2726,3599,1641,2842,5254,1526,1272,3718, # 2208
-4286,1686,1795, 416,2564,1903,1954,1804,5255,3852,2798,3853,1159,2321,5256,2881, # 2224
-4619,1610,1584,3056,2424,2764, 443,3302,1163,3161,5257,5258,4029,5259,4287,2506, # 2240
-3057,4620,4030,3162,2104,1647,3600,2011,1873,4288,5260,4289, 431,3485,5261, 250, # 2256
-  97,  81,4290,5262,1648,1851,1558, 160, 848,5263, 866, 740,1694,5264,2204,2843, # 2272
-3226,4291,4621,3719,1687, 950,2479, 426, 469,3227,3720,3721,4031,5265,5266,1188, # 2288
- 424,1996, 861,3601,4292,3854,2205,2694, 168,1235,3602,4293,5267,2087,1674,4622, # 2304
-3374,3303, 220,2565,1009,5268,3855, 670,3010, 332,1208, 717,5269,5270,3603,2452, # 2320
-4032,3375,5271, 513,5272,1209,2882,3376,3163,4623,1080,5273,5274,5275,5276,2534, # 2336
-3722,3604, 815,1587,4033,4034,5277,3605,3486,3856,1254,4624,1328,3058,1390,4035, # 2352
-1741,4036,3857,4037,5278, 236,3858,2453,3304,5279,5280,3723,3859,1273,3860,4625, # 2368
-5281, 308,5282,4626, 245,4627,1852,2480,1307,2583, 430, 715,2137,2454,5283, 270, # 2384
- 199,2883,4038,5284,3606,2727,1753, 761,1754, 725,1661,1841,4628,3487,3724,5285, # 2400
-5286, 587,  14,3305, 227,2608, 326, 480,2270, 943,2765,3607, 291, 650,1884,5287, # 2416
-1702,1226, 102,1547,  62,3488, 904,4629,3489,1164,4294,5288,5289,1224,1548,2766, # 2432
- 391, 498,1493,5290,1386,1419,5291,2056,1177,4630, 813, 880,1081,2368, 566,1145, # 2448
-4631,2291,1001,1035,2566,2609,2242, 394,1286,5292,5293,2069,5294,  86,1494,1730, # 2464
-4039, 491,1588, 745, 897,2963, 843,3377,4040,2767,2884,3306,1768, 998,2221,2070, # 2480
- 397,1827,1195,1970,3725,3011,3378, 284,5295,3861,2507,2138,2120,1904,5296,4041, # 2496
-2151,4042,4295,1036,3490,1905, 114,2567,4296, 209,1527,5297,5298,2964,2844,2635, # 2512
-2390,2728,3164, 812,2568,5299,3307,5300,1559, 737,1885,3726,1210, 885,  28,2695, # 2528
-3608,3862,5301,4297,1004,1780,4632,5302, 346,1982,2222,2696,4633,3863,1742, 797, # 2544
-1642,4043,1934,1072,1384,2152, 896,4044,3308,3727,3228,2885,3609,5303,2569,1959, # 2560
-4634,2455,1786,5304,5305,5306,4045,4298,1005,1308,3728,4299,2729,4635,4636,1528, # 2576
-2610, 161,1178,4300,1983, 987,4637,1101,4301, 631,4046,1157,3229,2425,1343,1241, # 2592
-1016,2243,2570, 372, 877,2344,2508,1160, 555,1935, 911,4047,5307, 466,1170, 169, # 2608
-1051,2921,2697,3729,2481,3012,1182,2012,2571,1251,2636,5308, 992,2345,3491,1540, # 2624
-2730,1201,2071,2406,1997,2482,5309,4638, 528,1923,2191,1503,1874,1570,2369,3379, # 2640
-3309,5310, 557,1073,5311,1828,3492,2088,2271,3165,3059,3107, 767,3108,2799,4639, # 2656
-1006,4302,4640,2346,1267,2179,3730,3230, 778,4048,3231,2731,1597,2667,5312,4641, # 2672
-5313,3493,5314,5315,5316,3310,2698,1433,3311, 131,  95,1504,4049, 723,4303,3166, # 2688
-1842,3610,2768,2192,4050,2028,2105,3731,5317,3013,4051,1218,5318,3380,3232,4052, # 2704
-4304,2584, 248,1634,3864, 912,5319,2845,3732,3060,3865, 654,  53,5320,3014,5321, # 2720
-1688,4642, 777,3494,1032,4053,1425,5322, 191, 820,2121,2846, 971,4643, 931,3233, # 2736
- 135, 664, 783,3866,1998, 772,2922,1936,4054,3867,4644,2923,3234, 282,2732, 640, # 2752
-1372,3495,1127, 922, 325,3381,5323,5324, 711,2045,5325,5326,4055,2223,2800,1937, # 2768
-4056,3382,2224,2255,3868,2305,5327,4645,3869,1258,3312,4057,3235,2139,2965,4058, # 2784
-4059,5328,2225, 258,3236,4646, 101,1227,5329,3313,1755,5330,1391,3314,5331,2924, # 2800
-2057, 893,5332,5333,5334,1402,4305,2347,5335,5336,3237,3611,5337,5338, 878,1325, # 2816
-1781,2801,4647, 259,1385,2585, 744,1183,2272,4648,5339,4060,2509,5340, 684,1024, # 2832
-4306,5341, 472,3612,3496,1165,3315,4061,4062, 322,2153, 881, 455,1695,1152,1340, # 2848
- 660, 554,2154,4649,1058,4650,4307, 830,1065,3383,4063,4651,1924,5342,1703,1919, # 2864
-5343, 932,2273, 122,5344,4652, 947, 677,5345,3870,2637, 297,1906,1925,2274,4653, # 2880
-2322,3316,5346,5347,4308,5348,4309,  84,4310, 112, 989,5349, 547,1059,4064, 701, # 2896
-3613,1019,5350,4311,5351,3497, 942, 639, 457,2306,2456, 993,2966, 407, 851, 494, # 2912
-4654,3384, 927,5352,1237,5353,2426,3385, 573,4312, 680, 921,2925,1279,1875, 285, # 2928
- 790,1448,1984, 719,2168,5354,5355,4655,4065,4066,1649,5356,1541, 563,5357,1077, # 2944
-5358,3386,3061,3498, 511,3015,4067,4068,3733,4069,1268,2572,3387,3238,4656,4657, # 2960
-5359, 535,1048,1276,1189,2926,2029,3167,1438,1373,2847,2967,1134,2013,5360,4313, # 2976
-1238,2586,3109,1259,5361, 700,5362,2968,3168,3734,4314,5363,4315,1146,1876,1907, # 2992
-4658,2611,4070, 781,2427, 132,1589, 203, 147, 273,2802,2407, 898,1787,2155,4071, # 3008
-4072,5364,3871,2803,5365,5366,4659,4660,5367,3239,5368,1635,3872, 965,5369,1805, # 3024
-2699,1516,3614,1121,1082,1329,3317,4073,1449,3873,  65,1128,2848,2927,2769,1590, # 3040
-3874,5370,5371,  12,2668,  45, 976,2587,3169,4661, 517,2535,1013,1037,3240,5372, # 3056
-3875,2849,5373,3876,5374,3499,5375,2612, 614,1999,2323,3877,3110,2733,2638,5376, # 3072
-2588,4316, 599,1269,5377,1811,3735,5378,2700,3111, 759,1060, 489,1806,3388,3318, # 3088
-1358,5379,5380,2391,1387,1215,2639,2256, 490,5381,5382,4317,1759,2392,2348,5383, # 3104
-4662,3878,1908,4074,2640,1807,3241,4663,3500,3319,2770,2349, 874,5384,5385,3501, # 3120
-3736,1859,  91,2928,3737,3062,3879,4664,5386,3170,4075,2669,5387,3502,1202,1403, # 3136
-3880,2969,2536,1517,2510,4665,3503,2511,5388,4666,5389,2701,1886,1495,1731,4076, # 3152
-2370,4667,5390,2030,5391,5392,4077,2702,1216, 237,2589,4318,2324,4078,3881,4668, # 3168
-4669,2703,3615,3504, 445,4670,5393,5394,5395,5396,2771,  61,4079,3738,1823,4080, # 3184
-5397, 687,2046, 935, 925, 405,2670, 703,1096,1860,2734,4671,4081,1877,1367,2704, # 3200
-3389, 918,2106,1782,2483, 334,3320,1611,1093,4672, 564,3171,3505,3739,3390, 945, # 3216
-2641,2058,4673,5398,1926, 872,4319,5399,3506,2705,3112, 349,4320,3740,4082,4674, # 3232
-3882,4321,3741,2156,4083,4675,4676,4322,4677,2408,2047, 782,4084, 400, 251,4323, # 3248
-1624,5400,5401, 277,3742, 299,1265, 476,1191,3883,2122,4324,4325,1109, 205,5402, # 3264
-2590,1000,2157,3616,1861,5403,5404,5405,4678,5406,4679,2573, 107,2484,2158,4085, # 3280
-3507,3172,5407,1533, 541,1301, 158, 753,4326,2886,3617,5408,1696, 370,1088,4327, # 3296
-4680,3618, 579, 327, 440, 162,2244, 269,1938,1374,3508, 968,3063,  56,1396,3113, # 3312
-2107,3321,3391,5409,1927,2159,4681,3016,5410,3619,5411,5412,3743,4682,2485,5413, # 3328
-2804,5414,1650,4683,5415,2613,5416,5417,4086,2671,3392,1149,3393,4087,3884,4088, # 3344
-5418,1076,  49,5419, 951,3242,3322,3323, 450,2850, 920,5420,1812,2805,2371,4328, # 3360
-1909,1138,2372,3885,3509,5421,3243,4684,1910,1147,1518,2428,4685,3886,5422,4686, # 3376
-2393,2614, 260,1796,3244,5423,5424,3887,3324, 708,5425,3620,1704,5426,3621,1351, # 3392
-1618,3394,3017,1887, 944,4329,3395,4330,3064,3396,4331,5427,3744, 422, 413,1714, # 3408
-3325, 500,2059,2350,4332,2486,5428,1344,1911, 954,5429,1668,5430,5431,4089,2409, # 3424
-4333,3622,3888,4334,5432,2307,1318,2512,3114, 133,3115,2887,4687, 629,  31,2851, # 3440
-2706,3889,4688, 850, 949,4689,4090,2970,1732,2089,4335,1496,1853,5433,4091, 620, # 3456
-3245, 981,1242,3745,3397,1619,3746,1643,3326,2140,2457,1971,1719,3510,2169,5434, # 3472
-3246,5435,5436,3398,1829,5437,1277,4690,1565,2048,5438,1636,3623,3116,5439, 869, # 3488
-2852, 655,3890,3891,3117,4092,3018,3892,1310,3624,4691,5440,5441,5442,1733, 558, # 3504
-4692,3747, 335,1549,3065,1756,4336,3748,1946,3511,1830,1291,1192, 470,2735,2108, # 3520
-2806, 913,1054,4093,5443,1027,5444,3066,4094,4693, 982,2672,3399,3173,3512,3247, # 3536
-3248,1947,2807,5445, 571,4694,5446,1831,5447,3625,2591,1523,2429,5448,2090, 984, # 3552
-4695,3749,1960,5449,3750, 852, 923,2808,3513,3751, 969,1519, 999,2049,2325,1705, # 3568
-5450,3118, 615,1662, 151, 597,4095,2410,2326,1049, 275,4696,3752,4337, 568,3753, # 3584
-3626,2487,4338,3754,5451,2430,2275, 409,3249,5452,1566,2888,3514,1002, 769,2853, # 3600
- 194,2091,3174,3755,2226,3327,4339, 628,1505,5453,5454,1763,2180,3019,4096, 521, # 3616
-1161,2592,1788,2206,2411,4697,4097,1625,4340,4341, 412,  42,3119, 464,5455,2642, # 3632
-4698,3400,1760,1571,2889,3515,2537,1219,2207,3893,2643,2141,2373,4699,4700,3328, # 3648
-1651,3401,3627,5456,5457,3628,2488,3516,5458,3756,5459,5460,2276,2092, 460,5461, # 3664
-4701,5462,3020, 962, 588,3629, 289,3250,2644,1116,  52,5463,3067,1797,5464,5465, # 3680
-5466,1467,5467,1598,1143,3757,4342,1985,1734,1067,4702,1280,3402, 465,4703,1572, # 3696
- 510,5468,1928,2245,1813,1644,3630,5469,4704,3758,5470,5471,2673,1573,1534,5472, # 3712
-5473, 536,1808,1761,3517,3894,3175,2645,5474,5475,5476,4705,3518,2929,1912,2809, # 3728
-5477,3329,1122, 377,3251,5478, 360,5479,5480,4343,1529, 551,5481,2060,3759,1769, # 3744
-2431,5482,2930,4344,3330,3120,2327,2109,2031,4706,1404, 136,1468,1479, 672,1171, # 3760
-3252,2308, 271,3176,5483,2772,5484,2050, 678,2736, 865,1948,4707,5485,2014,4098, # 3776
-2971,5486,2737,2227,1397,3068,3760,4708,4709,1735,2931,3403,3631,5487,3895, 509, # 3792
-2854,2458,2890,3896,5488,5489,3177,3178,4710,4345,2538,4711,2309,1166,1010, 552, # 3808
- 681,1888,5490,5491,2972,2973,4099,1287,1596,1862,3179, 358, 453, 736, 175, 478, # 3824
-1117, 905,1167,1097,5492,1854,1530,5493,1706,5494,2181,3519,2292,3761,3520,3632, # 3840
-4346,2093,4347,5495,3404,1193,2489,4348,1458,2193,2208,1863,1889,1421,3331,2932, # 3856
-3069,2182,3521, 595,2123,5496,4100,5497,5498,4349,1707,2646, 223,3762,1359, 751, # 3872
-3121, 183,3522,5499,2810,3021, 419,2374, 633, 704,3897,2394, 241,5500,5501,5502, # 3888
- 838,3022,3763,2277,2773,2459,3898,1939,2051,4101,1309,3122,2246,1181,5503,1136, # 3904
-2209,3899,2375,1446,4350,2310,4712,5504,5505,4351,1055,2615, 484,3764,5506,4102, # 3920
- 625,4352,2278,3405,1499,4353,4103,5507,4104,4354,3253,2279,2280,3523,5508,5509, # 3936
-2774, 808,2616,3765,3406,4105,4355,3123,2539, 526,3407,3900,4356, 955,5510,1620, # 3952
-4357,2647,2432,5511,1429,3766,1669,1832, 994, 928,5512,3633,1260,5513,5514,5515, # 3968
-1949,2293, 741,2933,1626,4358,2738,2460, 867,1184, 362,3408,1392,5516,5517,4106, # 3984
-4359,1770,1736,3254,2934,4713,4714,1929,2707,1459,1158,5518,3070,3409,2891,1292, # 4000
-1930,2513,2855,3767,1986,1187,2072,2015,2617,4360,5519,2574,2514,2170,3768,2490, # 4016
-3332,5520,3769,4715,5521,5522, 666,1003,3023,1022,3634,4361,5523,4716,1814,2257, # 4032
- 574,3901,1603, 295,1535, 705,3902,4362, 283, 858, 417,5524,5525,3255,4717,4718, # 4048
-3071,1220,1890,1046,2281,2461,4107,1393,1599, 689,2575, 388,4363,5526,2491, 802, # 4064
-5527,2811,3903,2061,1405,2258,5528,4719,3904,2110,1052,1345,3256,1585,5529, 809, # 4080
-5530,5531,5532, 575,2739,3524, 956,1552,1469,1144,2328,5533,2329,1560,2462,3635, # 4096
-3257,4108, 616,2210,4364,3180,2183,2294,5534,1833,5535,3525,4720,5536,1319,3770, # 4112
-3771,1211,3636,1023,3258,1293,2812,5537,5538,5539,3905, 607,2311,3906, 762,2892, # 4128
-1439,4365,1360,4721,1485,3072,5540,4722,1038,4366,1450,2062,2648,4367,1379,4723, # 4144
-2593,5541,5542,4368,1352,1414,2330,2935,1172,5543,5544,3907,3908,4724,1798,1451, # 4160
-5545,5546,5547,5548,2936,4109,4110,2492,2351, 411,4111,4112,3637,3333,3124,4725, # 4176
-1561,2674,1452,4113,1375,5549,5550,  47,2974, 316,5551,1406,1591,2937,3181,5552, # 4192
-1025,2142,3125,3182, 354,2740, 884,2228,4369,2412, 508,3772, 726,3638, 996,2433, # 4208
-3639, 729,5553, 392,2194,1453,4114,4726,3773,5554,5555,2463,3640,2618,1675,2813, # 4224
- 919,2352,2975,2353,1270,4727,4115,  73,5556,5557, 647,5558,3259,2856,2259,1550, # 4240
-1346,3024,5559,1332, 883,3526,5560,5561,5562,5563,3334,2775,5564,1212, 831,1347, # 4256
-4370,4728,2331,3909,1864,3073, 720,3910,4729,4730,3911,5565,4371,5566,5567,4731, # 4272
-5568,5569,1799,4732,3774,2619,4733,3641,1645,2376,4734,5570,2938, 669,2211,2675, # 4288
-2434,5571,2893,5572,5573,1028,3260,5574,4372,2413,5575,2260,1353,5576,5577,4735, # 4304
-3183, 518,5578,4116,5579,4373,1961,5580,2143,4374,5581,5582,3025,2354,2355,3912, # 4320
- 516,1834,1454,4117,2708,4375,4736,2229,2620,1972,1129,3642,5583,2776,5584,2976, # 4336
-1422, 577,1470,3026,1524,3410,5585,5586, 432,4376,3074,3527,5587,2594,1455,2515, # 4352
-2230,1973,1175,5588,1020,2741,4118,3528,4737,5589,2742,5590,1743,1361,3075,3529, # 4368
-2649,4119,4377,4738,2295, 895, 924,4378,2171, 331,2247,3076, 166,1627,3077,1098, # 4384
-5591,1232,2894,2231,3411,4739, 657, 403,1196,2377, 542,3775,3412,1600,4379,3530, # 4400
-5592,4740,2777,3261, 576, 530,1362,4741,4742,2540,2676,3776,4120,5593, 842,3913, # 4416
-5594,2814,2032,1014,4121, 213,2709,3413, 665, 621,4380,5595,3777,2939,2435,5596, # 4432
-2436,3335,3643,3414,4743,4381,2541,4382,4744,3644,1682,4383,3531,1380,5597, 724, # 4448
-2282, 600,1670,5598,1337,1233,4745,3126,2248,5599,1621,4746,5600, 651,4384,5601, # 4464
-1612,4385,2621,5602,2857,5603,2743,2312,3078,5604, 716,2464,3079, 174,1255,2710, # 4480
-4122,3645, 548,1320,1398, 728,4123,1574,5605,1891,1197,3080,4124,5606,3081,3082, # 4496
-3778,3646,3779, 747,5607, 635,4386,4747,5608,5609,5610,4387,5611,5612,4748,5613, # 4512
-3415,4749,2437, 451,5614,3780,2542,2073,4388,2744,4389,4125,5615,1764,4750,5616, # 4528
-4390, 350,4751,2283,2395,2493,5617,4391,4126,2249,1434,4127, 488,4752, 458,4392, # 4544
-4128,3781, 771,1330,2396,3914,2576,3184,2160,2414,1553,2677,3185,4393,5618,2494, # 4560
-2895,2622,1720,2711,4394,3416,4753,5619,2543,4395,5620,3262,4396,2778,5621,2016, # 4576
-2745,5622,1155,1017,3782,3915,5623,3336,2313, 201,1865,4397,1430,5624,4129,5625, # 4592
-5626,5627,5628,5629,4398,1604,5630, 414,1866, 371,2595,4754,4755,3532,2017,3127, # 4608
-4756,1708, 960,4399, 887, 389,2172,1536,1663,1721,5631,2232,4130,2356,2940,1580, # 4624
-5632,5633,1744,4757,2544,4758,4759,5634,4760,5635,2074,5636,4761,3647,3417,2896, # 4640
-4400,5637,4401,2650,3418,2815, 673,2712,2465, 709,3533,4131,3648,4402,5638,1148, # 4656
- 502, 634,5639,5640,1204,4762,3649,1575,4763,2623,3783,5641,3784,3128, 948,3263, # 4672
- 121,1745,3916,1110,5642,4403,3083,2516,3027,4132,3785,1151,1771,3917,1488,4133, # 4688
-1987,5643,2438,3534,5644,5645,2094,5646,4404,3918,1213,1407,2816, 531,2746,2545, # 4704
-3264,1011,1537,4764,2779,4405,3129,1061,5647,3786,3787,1867,2897,5648,2018, 120, # 4720
-4406,4407,2063,3650,3265,2314,3919,2678,3419,1955,4765,4134,5649,3535,1047,2713, # 4736
-1266,5650,1368,4766,2858, 649,3420,3920,2546,2747,1102,2859,2679,5651,5652,2000, # 4752
-5653,1111,3651,2977,5654,2495,3921,3652,2817,1855,3421,3788,5655,5656,3422,2415, # 4768
-2898,3337,3266,3653,5657,2577,5658,3654,2818,4135,1460, 856,5659,3655,5660,2899, # 4784
-2978,5661,2900,3922,5662,4408, 632,2517, 875,3923,1697,3924,2296,5663,5664,4767, # 4800
-3028,1239, 580,4768,4409,5665, 914, 936,2075,1190,4136,1039,2124,5666,5667,5668, # 4816
-5669,3423,1473,5670,1354,4410,3925,4769,2173,3084,4137, 915,3338,4411,4412,3339, # 4832
-1605,1835,5671,2748, 398,3656,4413,3926,4138, 328,1913,2860,4139,3927,1331,4414, # 4848
-3029, 937,4415,5672,3657,4140,4141,3424,2161,4770,3425, 524, 742, 538,3085,1012, # 4864
-5673,5674,3928,2466,5675, 658,1103, 225,3929,5676,5677,4771,5678,4772,5679,3267, # 4880
-1243,5680,4142, 963,2250,4773,5681,2714,3658,3186,5682,5683,2596,2332,5684,4774, # 4896
-5685,5686,5687,3536, 957,3426,2547,2033,1931,2941,2467, 870,2019,3659,1746,2780, # 4912
-2781,2439,2468,5688,3930,5689,3789,3130,3790,3537,3427,3791,5690,1179,3086,5691, # 4928
-3187,2378,4416,3792,2548,3188,3131,2749,4143,5692,3428,1556,2549,2297, 977,2901, # 4944
-2034,4144,1205,3429,5693,1765,3430,3189,2125,1271, 714,1689,4775,3538,5694,2333, # 4960
-3931, 533,4417,3660,2184, 617,5695,2469,3340,3539,2315,5696,5697,3190,5698,5699, # 4976
-3932,1988, 618, 427,2651,3540,3431,5700,5701,1244,1690,5702,2819,4418,4776,5703, # 4992
-3541,4777,5704,2284,1576, 473,3661,4419,3432, 972,5705,3662,5706,3087,5707,5708, # 5008
-4778,4779,5709,3793,4145,4146,5710, 153,4780, 356,5711,1892,2902,4420,2144, 408, # 5024
- 803,2357,5712,3933,5713,4421,1646,2578,2518,4781,4782,3934,5714,3935,4422,5715, # 5040
-2416,3433, 752,5716,5717,1962,3341,2979,5718, 746,3030,2470,4783,4423,3794, 698, # 5056
-4784,1893,4424,3663,2550,4785,3664,3936,5719,3191,3434,5720,1824,1302,4147,2715, # 5072
-3937,1974,4425,5721,4426,3192, 823,1303,1288,1236,2861,3542,4148,3435, 774,3938, # 5088
-5722,1581,4786,1304,2862,3939,4787,5723,2440,2162,1083,3268,4427,4149,4428, 344, # 5104
-1173, 288,2316, 454,1683,5724,5725,1461,4788,4150,2597,5726,5727,4789, 985, 894, # 5120
-5728,3436,3193,5729,1914,2942,3795,1989,5730,2111,1975,5731,4151,5732,2579,1194, # 5136
- 425,5733,4790,3194,1245,3796,4429,5734,5735,2863,5736, 636,4791,1856,3940, 760, # 5152
-1800,5737,4430,2212,1508,4792,4152,1894,1684,2298,5738,5739,4793,4431,4432,2213, # 5168
- 479,5740,5741, 832,5742,4153,2496,5743,2980,2497,3797, 990,3132, 627,1815,2652, # 5184
-4433,1582,4434,2126,2112,3543,4794,5744, 799,4435,3195,5745,4795,2113,1737,3031, # 5200
-1018, 543, 754,4436,3342,1676,4796,4797,4154,4798,1489,5746,3544,5747,2624,2903, # 5216
-4155,5748,5749,2981,5750,5751,5752,5753,3196,4799,4800,2185,1722,5754,3269,3270, # 5232
-1843,3665,1715, 481, 365,1976,1857,5755,5756,1963,2498,4801,5757,2127,3666,3271, # 5248
- 433,1895,2064,2076,5758, 602,2750,5759,5760,5761,5762,5763,3032,1628,3437,5764, # 5264
-3197,4802,4156,2904,4803,2519,5765,2551,2782,5766,5767,5768,3343,4804,2905,5769, # 5280
-4805,5770,2864,4806,4807,1221,2982,4157,2520,5771,5772,5773,1868,1990,5774,5775, # 5296
-5776,1896,5777,5778,4808,1897,4158, 318,5779,2095,4159,4437,5780,5781, 485,5782, # 5312
- 938,3941, 553,2680, 116,5783,3942,3667,5784,3545,2681,2783,3438,3344,2820,5785, # 5328
-3668,2943,4160,1747,2944,2983,5786,5787, 207,5788,4809,5789,4810,2521,5790,3033, # 5344
- 890,3669,3943,5791,1878,3798,3439,5792,2186,2358,3440,1652,5793,5794,5795, 941, # 5360
-2299, 208,3546,4161,2020, 330,4438,3944,2906,2499,3799,4439,4811,5796,5797,5798, # 5376
-)
-
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/big5prober.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/big5prober.py
deleted file mode 100644
index 98f9970..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/big5prober.py
+++ /dev/null
@@ -1,47 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .mbcharsetprober import MultiByteCharSetProber
-from .codingstatemachine import CodingStateMachine
-from .chardistribution import Big5DistributionAnalysis
-from .mbcssm import BIG5_SM_MODEL
-
-
-class Big5Prober(MultiByteCharSetProber):
-    def __init__(self):
-        super(Big5Prober, self).__init__()
-        self.coding_sm = CodingStateMachine(BIG5_SM_MODEL)
-        self.distribution_analyzer = Big5DistributionAnalysis()
-        self.reset()
-
-    @property
-    def charset_name(self):
-        return "Big5"
-
-    @property
-    def language(self):
-        return "Chinese"
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/chardistribution.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/chardistribution.py
deleted file mode 100644
index c0395f4..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/chardistribution.py
+++ /dev/null
@@ -1,233 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .euctwfreq import (EUCTW_CHAR_TO_FREQ_ORDER, EUCTW_TABLE_SIZE,
-                        EUCTW_TYPICAL_DISTRIBUTION_RATIO)
-from .euckrfreq import (EUCKR_CHAR_TO_FREQ_ORDER, EUCKR_TABLE_SIZE,
-                        EUCKR_TYPICAL_DISTRIBUTION_RATIO)
-from .gb2312freq import (GB2312_CHAR_TO_FREQ_ORDER, GB2312_TABLE_SIZE,
-                         GB2312_TYPICAL_DISTRIBUTION_RATIO)
-from .big5freq import (BIG5_CHAR_TO_FREQ_ORDER, BIG5_TABLE_SIZE,
-                       BIG5_TYPICAL_DISTRIBUTION_RATIO)
-from .jisfreq import (JIS_CHAR_TO_FREQ_ORDER, JIS_TABLE_SIZE,
-                      JIS_TYPICAL_DISTRIBUTION_RATIO)
-
-
-class CharDistributionAnalysis(object):
-    ENOUGH_DATA_THRESHOLD = 1024
-    SURE_YES = 0.99
-    SURE_NO = 0.01
-    MINIMUM_DATA_THRESHOLD = 3
-
-    def __init__(self):
-        # Mapping table to get frequency order from char order (get from
-        # GetOrder())
-        self._char_to_freq_order = None
-        self._table_size = None  # Size of above table
-        # This is a constant value which varies from language to language,
-        # used in calculating confidence.  See
-        # http://www.mozilla.org/projects/intl/UniversalCharsetDetection.html
-        # for further detail.
-        self.typical_distribution_ratio = None
-        self._done = None
-        self._total_chars = None
-        self._freq_chars = None
-        self.reset()
-
-    def reset(self):
-        """reset analyser, clear any state"""
-        # If this flag is set to True, detection is done and conclusion has
-        # been made
-        self._done = False
-        self._total_chars = 0  # Total characters encountered
-        # The number of characters whose frequency order is less than 512
-        self._freq_chars = 0
-
-    def feed(self, char, char_len):
-        """feed a character with known length"""
-        if char_len == 2:
-            # we only care about 2-bytes character in our distribution analysis
-            order = self.get_order(char)
-        else:
-            order = -1
-        if order >= 0:
-            self._total_chars += 1
-            # order is valid
-            if order < self._table_size:
-                if 512 > self._char_to_freq_order[order]:
-                    self._freq_chars += 1
-
-    def get_confidence(self):
-        """return confidence based on existing data"""
-        # if we didn't receive any character in our consideration range,
-        # return negative answer
-        if self._total_chars <= 0 or self._freq_chars <= self.MINIMUM_DATA_THRESHOLD:
-            return self.SURE_NO
-
-        if self._total_chars != self._freq_chars:
-            r = (self._freq_chars / ((self._total_chars - self._freq_chars)
-                 * self.typical_distribution_ratio))
-            if r < self.SURE_YES:
-                return r
-
-        # normalize confidence (we don't want to be 100% sure)
-        return self.SURE_YES
-
-    def got_enough_data(self):
-        # It is not necessary to receive all data to draw conclusion.
-        # For charset detection, certain amount of data is enough
-        return self._total_chars > self.ENOUGH_DATA_THRESHOLD
-
-    def get_order(self, byte_str):
-        # We do not handle characters based on the original encoding string,
-        # but convert this encoding string to a number, here called order.
-        # This allows multiple encodings of a language to share one frequency
-        # table.
-        return -1
-
-
-class EUCTWDistributionAnalysis(CharDistributionAnalysis):
-    def __init__(self):
-        super(EUCTWDistributionAnalysis, self).__init__()
-        self._char_to_freq_order = EUCTW_CHAR_TO_FREQ_ORDER
-        self._table_size = EUCTW_TABLE_SIZE
-        self.typical_distribution_ratio = EUCTW_TYPICAL_DISTRIBUTION_RATIO
-
-    def get_order(self, byte_str):
-        # for euc-TW encoding, we are interested
-        #   first  byte range: 0xc4 -- 0xfe
-        #   second byte range: 0xa1 -- 0xfe
-        # no validation needed here. State machine has done that
-        first_char = byte_str[0]
-        if first_char >= 0xC4:
-            return 94 * (first_char - 0xC4) + byte_str[1] - 0xA1
-        else:
-            return -1
-
-
-class EUCKRDistributionAnalysis(CharDistributionAnalysis):
-    def __init__(self):
-        super(EUCKRDistributionAnalysis, self).__init__()
-        self._char_to_freq_order = EUCKR_CHAR_TO_FREQ_ORDER
-        self._table_size = EUCKR_TABLE_SIZE
-        self.typical_distribution_ratio = EUCKR_TYPICAL_DISTRIBUTION_RATIO
-
-    def get_order(self, byte_str):
-        # for euc-KR encoding, we are interested
-        #   first  byte range: 0xb0 -- 0xfe
-        #   second byte range: 0xa1 -- 0xfe
-        # no validation needed here. State machine has done that
-        first_char = byte_str[0]
-        if first_char >= 0xB0:
-            return 94 * (first_char - 0xB0) + byte_str[1] - 0xA1
-        else:
-            return -1
-
-
-class GB2312DistributionAnalysis(CharDistributionAnalysis):
-    def __init__(self):
-        super(GB2312DistributionAnalysis, self).__init__()
-        self._char_to_freq_order = GB2312_CHAR_TO_FREQ_ORDER
-        self._table_size = GB2312_TABLE_SIZE
-        self.typical_distribution_ratio = GB2312_TYPICAL_DISTRIBUTION_RATIO
-
-    def get_order(self, byte_str):
-        # for GB2312 encoding, we are interested
-        #  first  byte range: 0xb0 -- 0xfe
-        #  second byte range: 0xa1 -- 0xfe
-        # no validation needed here. State machine has done that
-        first_char, second_char = byte_str[0], byte_str[1]
-        if (first_char >= 0xB0) and (second_char >= 0xA1):
-            return 94 * (first_char - 0xB0) + second_char - 0xA1
-        else:
-            return -1
-
-
-class Big5DistributionAnalysis(CharDistributionAnalysis):
-    def __init__(self):
-        super(Big5DistributionAnalysis, self).__init__()
-        self._char_to_freq_order = BIG5_CHAR_TO_FREQ_ORDER
-        self._table_size = BIG5_TABLE_SIZE
-        self.typical_distribution_ratio = BIG5_TYPICAL_DISTRIBUTION_RATIO
-
-    def get_order(self, byte_str):
-        # for big5 encoding, we are interested
-        #   first  byte range: 0xa4 -- 0xfe
-        #   second byte range: 0x40 -- 0x7e , 0xa1 -- 0xfe
-        # no validation needed here. State machine has done that
-        first_char, second_char = byte_str[0], byte_str[1]
-        if first_char >= 0xA4:
-            if second_char >= 0xA1:
-                return 157 * (first_char - 0xA4) + second_char - 0xA1 + 63
-            else:
-                return 157 * (first_char - 0xA4) + second_char - 0x40
-        else:
-            return -1
-
-
-class SJISDistributionAnalysis(CharDistributionAnalysis):
-    def __init__(self):
-        super(SJISDistributionAnalysis, self).__init__()
-        self._char_to_freq_order = JIS_CHAR_TO_FREQ_ORDER
-        self._table_size = JIS_TABLE_SIZE
-        self.typical_distribution_ratio = JIS_TYPICAL_DISTRIBUTION_RATIO
-
-    def get_order(self, byte_str):
-        # for sjis encoding, we are interested
-        #   first  byte range: 0x81 -- 0x9f , 0xe0 -- 0xfe
-        #   second byte range: 0x40 -- 0x7e,  0x81 -- oxfe
-        # no validation needed here. State machine has done that
-        first_char, second_char = byte_str[0], byte_str[1]
-        if (first_char >= 0x81) and (first_char <= 0x9F):
-            order = 188 * (first_char - 0x81)
-        elif (first_char >= 0xE0) and (first_char <= 0xEF):
-            order = 188 * (first_char - 0xE0 + 31)
-        else:
-            return -1
-        order = order + second_char - 0x40
-        if second_char > 0x7F:
-            order = -1
-        return order
-
-
-class EUCJPDistributionAnalysis(CharDistributionAnalysis):
-    def __init__(self):
-        super(EUCJPDistributionAnalysis, self).__init__()
-        self._char_to_freq_order = JIS_CHAR_TO_FREQ_ORDER
-        self._table_size = JIS_TABLE_SIZE
-        self.typical_distribution_ratio = JIS_TYPICAL_DISTRIBUTION_RATIO
-
-    def get_order(self, byte_str):
-        # for euc-JP encoding, we are interested
-        #   first  byte range: 0xa0 -- 0xfe
-        #   second byte range: 0xa1 -- 0xfe
-        # no validation needed here. State machine has done that
-        char = byte_str[0]
-        if char >= 0xA0:
-            return 94 * (char - 0xA1) + byte_str[1] - 0xa1
-        else:
-            return -1
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/charsetgroupprober.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/charsetgroupprober.py
deleted file mode 100644
index 8b3738e..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/charsetgroupprober.py
+++ /dev/null
@@ -1,106 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .enums import ProbingState
-from .charsetprober import CharSetProber
-
-
-class CharSetGroupProber(CharSetProber):
-    def __init__(self, lang_filter=None):
-        super(CharSetGroupProber, self).__init__(lang_filter=lang_filter)
-        self._active_num = 0
-        self.probers = []
-        self._best_guess_prober = None
-
-    def reset(self):
-        super(CharSetGroupProber, self).reset()
-        self._active_num = 0
-        for prober in self.probers:
-            if prober:
-                prober.reset()
-                prober.active = True
-                self._active_num += 1
-        self._best_guess_prober = None
-
-    @property
-    def charset_name(self):
-        if not self._best_guess_prober:
-            self.get_confidence()
-            if not self._best_guess_prober:
-                return None
-        return self._best_guess_prober.charset_name
-
-    @property
-    def language(self):
-        if not self._best_guess_prober:
-            self.get_confidence()
-            if not self._best_guess_prober:
-                return None
-        return self._best_guess_prober.language
-
-    def feed(self, byte_str):
-        for prober in self.probers:
-            if not prober:
-                continue
-            if not prober.active:
-                continue
-            state = prober.feed(byte_str)
-            if not state:
-                continue
-            if state == ProbingState.FOUND_IT:
-                self._best_guess_prober = prober
-                return self.state
-            elif state == ProbingState.NOT_ME:
-                prober.active = False
-                self._active_num -= 1
-                if self._active_num <= 0:
-                    self._state = ProbingState.NOT_ME
-                    return self.state
-        return self.state
-
-    def get_confidence(self):
-        state = self.state
-        if state == ProbingState.FOUND_IT:
-            return 0.99
-        elif state == ProbingState.NOT_ME:
-            return 0.01
-        best_conf = 0.0
-        self._best_guess_prober = None
-        for prober in self.probers:
-            if not prober:
-                continue
-            if not prober.active:
-                self.logger.debug('%s not active', prober.charset_name)
-                continue
-            conf = prober.get_confidence()
-            self.logger.debug('%s %s confidence = %s', prober.charset_name, prober.language, conf)
-            if best_conf < conf:
-                best_conf = conf
-                self._best_guess_prober = prober
-        if not self._best_guess_prober:
-            return 0.0
-        return best_conf
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/charsetprober.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/charsetprober.py
deleted file mode 100644
index eac4e59..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/charsetprober.py
+++ /dev/null
@@ -1,145 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Universal charset detector code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 2001
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#   Shy Shalom - original C code
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-import logging
-import re
-
-from .enums import ProbingState
-
-
-class CharSetProber(object):
-
-    SHORTCUT_THRESHOLD = 0.95
-
-    def __init__(self, lang_filter=None):
-        self._state = None
-        self.lang_filter = lang_filter
-        self.logger = logging.getLogger(__name__)
-
-    def reset(self):
-        self._state = ProbingState.DETECTING
-
-    @property
-    def charset_name(self):
-        return None
-
-    def feed(self, buf):
-        pass
-
-    @property
-    def state(self):
-        return self._state
-
-    def get_confidence(self):
-        return 0.0
-
-    @staticmethod
-    def filter_high_byte_only(buf):
-        buf = re.sub(b'([\x00-\x7F])+', b' ', buf)
-        return buf
-
-    @staticmethod
-    def filter_international_words(buf):
-        """
-        We define three types of bytes:
-        alphabet: english alphabets [a-zA-Z]
-        international: international characters [\x80-\xFF]
-        marker: everything else [^a-zA-Z\x80-\xFF]
-
-        The input buffer can be thought to contain a series of words delimited
-        by markers. This function works to filter all words that contain at
-        least one international character. All contiguous sequences of markers
-        are replaced by a single space ascii character.
-
-        This filter applies to all scripts which do not use English characters.
-        """
-        filtered = bytearray()
-
-        # This regex expression filters out only words that have at-least one
-        # international character. The word may include one marker character at
-        # the end.
-        words = re.findall(b'[a-zA-Z]*[\x80-\xFF]+[a-zA-Z]*[^a-zA-Z\x80-\xFF]?',
-                           buf)
-
-        for word in words:
-            filtered.extend(word[:-1])
-
-            # If the last character in the word is a marker, replace it with a
-            # space as markers shouldn't affect our analysis (they are used
-            # similarly across all languages and may thus have similar
-            # frequencies).
-            last_char = word[-1:]
-            if not last_char.isalpha() and last_char < b'\x80':
-                last_char = b' '
-            filtered.extend(last_char)
-
-        return filtered
-
-    @staticmethod
-    def filter_with_english_letters(buf):
-        """
-        Returns a copy of ``buf`` that retains only the sequences of English
-        alphabet and high byte characters that are not between <> characters.
-        Also retains English alphabet and high byte characters immediately
-        before occurrences of >.
-
-        This filter can be applied to all scripts which contain both English
-        characters and extended ASCII characters, but is currently only used by
-        ``Latin1Prober``.
-        """
-        filtered = bytearray()
-        in_tag = False
-        prev = 0
-
-        for curr in range(len(buf)):
-            # Slice here to get bytes instead of an int with Python 3
-            buf_char = buf[curr:curr + 1]
-            # Check if we're coming out of or entering an HTML tag
-            if buf_char == b'>':
-                in_tag = False
-            elif buf_char == b'<':
-                in_tag = True
-
-            # If current character is not extended-ASCII and not alphabetic...
-            if buf_char < b'\x80' and not buf_char.isalpha():
-                # ...and we're not in a tag
-                if curr > prev and not in_tag:
-                    # Keep everything after last non-extended-ASCII,
-                    # non-alphabetic character
-                    filtered.extend(buf[prev:curr])
-                    # Output a space to delimit stretch we kept
-                    filtered.extend(b' ')
-                prev = curr + 1
-
-        # If we're not in a tag...
-        if not in_tag:
-            # Keep everything after last non-extended-ASCII, non-alphabetic
-            # character
-            filtered.extend(buf[prev:])
-
-        return filtered
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/cli/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/cli/__init__.py
deleted file mode 100644
index 8b13789..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/cli/__init__.py
+++ /dev/null
@@ -1 +0,0 @@
-
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/cli/chardetect.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/cli/chardetect.py
deleted file mode 100644
index c61136b..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/cli/chardetect.py
+++ /dev/null
@@ -1,85 +0,0 @@
-#!/usr/bin/env python
-"""
-Script which takes one or more file paths and reports on their detected
-encodings
-
-Example::
-
-    % chardetect somefile someotherfile
-    somefile: windows-1252 with confidence 0.5
-    someotherfile: ascii with confidence 1.0
-
-If no paths are provided, it takes its input from stdin.
-
-"""
-
-from __future__ import absolute_import, print_function, unicode_literals
-
-import argparse
-import sys
-
-from pip._vendor.chardet import __version__
-from pip._vendor.chardet.compat import PY2
-from pip._vendor.chardet.universaldetector import UniversalDetector
-
-
-def description_of(lines, name='stdin'):
-    """
-    Return a string describing the probable encoding of a file or
-    list of strings.
-
-    :param lines: The lines to get the encoding of.
-    :type lines: Iterable of bytes
-    :param name: Name of file or collection of lines
-    :type name: str
-    """
-    u = UniversalDetector()
-    for line in lines:
-        line = bytearray(line)
-        u.feed(line)
-        # shortcut out of the loop to save reading further - particularly useful if we read a BOM.
-        if u.done:
-            break
-    u.close()
-    result = u.result
-    if PY2:
-        name = name.decode(sys.getfilesystemencoding(), 'ignore')
-    if result['encoding']:
-        return '{0}: {1} with confidence {2}'.format(name, result['encoding'],
-                                                     result['confidence'])
-    else:
-        return '{0}: no result'.format(name)
-
-
-def main(argv=None):
-    """
-    Handles command line arguments and gets things started.
-
-    :param argv: List of arguments, as if specified on the command-line.
-                 If None, ``sys.argv[1:]`` is used instead.
-    :type argv: list of str
-    """
-    # Get command line arguments
-    parser = argparse.ArgumentParser(
-        description="Takes one or more file paths and reports their detected \
-                     encodings")
-    parser.add_argument('input',
-                        help='File whose encoding we would like to determine. \
-                              (default: stdin)',
-                        type=argparse.FileType('rb'), nargs='*',
-                        default=[sys.stdin if PY2 else sys.stdin.buffer])
-    parser.add_argument('--version', action='version',
-                        version='%(prog)s {0}'.format(__version__))
-    args = parser.parse_args(argv)
-
-    for f in args.input:
-        if f.isatty():
-            print("You are running chardetect interactively. Press " +
-                  "CTRL-D twice at the start of a blank line to signal the " +
-                  "end of your input. If you want help, run chardetect " +
-                  "--help\n", file=sys.stderr)
-        print(description_of(f, f.name))
-
-
-if __name__ == '__main__':
-    main()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/codingstatemachine.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/codingstatemachine.py
deleted file mode 100644
index 68fba44..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/codingstatemachine.py
+++ /dev/null
@@ -1,88 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is mozilla.org code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-import logging
-
-from .enums import MachineState
-
-
-class CodingStateMachine(object):
-    """
-    A state machine to verify a byte sequence for a particular encoding. For
-    each byte the detector receives, it will feed that byte to every active
-    state machine available, one byte at a time. The state machine changes its
-    state based on its previous state and the byte it receives. There are 3
-    states in a state machine that are of interest to an auto-detector:
-
-    START state: This is the state to start with, or a legal byte sequence
-                 (i.e. a valid code point) for character has been identified.
-
-    ME state:  This indicates that the state machine identified a byte sequence
-               that is specific to the charset it is designed for and that
-               there is no other possible encoding which can contain this byte
-               sequence. This will to lead to an immediate positive answer for
-               the detector.
-
-    ERROR state: This indicates the state machine identified an illegal byte
-                 sequence for that encoding. This will lead to an immediate
-                 negative answer for this encoding. Detector will exclude this
-                 encoding from consideration from here on.
-    """
-    def __init__(self, sm):
-        self._model = sm
-        self._curr_byte_pos = 0
-        self._curr_char_len = 0
-        self._curr_state = None
-        self.logger = logging.getLogger(__name__)
-        self.reset()
-
-    def reset(self):
-        self._curr_state = MachineState.START
-
-    def next_state(self, c):
-        # for each byte we get its class
-        # if it is first byte, we also get byte length
-        byte_class = self._model['class_table'][c]
-        if self._curr_state == MachineState.START:
-            self._curr_byte_pos = 0
-            self._curr_char_len = self._model['char_len_table'][byte_class]
-        # from byte's class and state_table, we get its next state
-        curr_state = (self._curr_state * self._model['class_factor']
-                      + byte_class)
-        self._curr_state = self._model['state_table'][curr_state]
-        self._curr_byte_pos += 1
-        return self._curr_state
-
-    def get_current_charlen(self):
-        return self._curr_char_len
-
-    def get_coding_state_machine(self):
-        return self._model['name']
-
-    @property
-    def language(self):
-        return self._model['language']
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/compat.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/compat.py
deleted file mode 100644
index ddd7468..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/compat.py
+++ /dev/null
@@ -1,34 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# Contributor(s):
-#   Dan Blanchard
-#   Ian Cordasco
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-import sys
-
-
-if sys.version_info < (3, 0):
-    PY2 = True
-    PY3 = False
-    base_str = (str, unicode)
-    text_type = unicode
-else:
-    PY2 = False
-    PY3 = True
-    base_str = (bytes, str)
-    text_type = str
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/cp949prober.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/cp949prober.py
deleted file mode 100644
index efd793a..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/cp949prober.py
+++ /dev/null
@@ -1,49 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is mozilla.org code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .chardistribution import EUCKRDistributionAnalysis
-from .codingstatemachine import CodingStateMachine
-from .mbcharsetprober import MultiByteCharSetProber
-from .mbcssm import CP949_SM_MODEL
-
-
-class CP949Prober(MultiByteCharSetProber):
-    def __init__(self):
-        super(CP949Prober, self).__init__()
-        self.coding_sm = CodingStateMachine(CP949_SM_MODEL)
-        # NOTE: CP949 is a superset of EUC-KR, so the distribution should be
-        #       not different.
-        self.distribution_analyzer = EUCKRDistributionAnalysis()
-        self.reset()
-
-    @property
-    def charset_name(self):
-        return "CP949"
-
-    @property
-    def language(self):
-        return "Korean"
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/enums.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/enums.py
deleted file mode 100644
index 0451207..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/enums.py
+++ /dev/null
@@ -1,76 +0,0 @@
-"""
-All of the Enums that are used throughout the chardet package.
-
-:author: Dan Blanchard (dan.blanchard@gmail.com)
-"""
-
-
-class InputState(object):
-    """
-    This enum represents the different states a universal detector can be in.
-    """
-    PURE_ASCII = 0
-    ESC_ASCII = 1
-    HIGH_BYTE = 2
-
-
-class LanguageFilter(object):
-    """
-    This enum represents the different language filters we can apply to a
-    ``UniversalDetector``.
-    """
-    CHINESE_SIMPLIFIED = 0x01
-    CHINESE_TRADITIONAL = 0x02
-    JAPANESE = 0x04
-    KOREAN = 0x08
-    NON_CJK = 0x10
-    ALL = 0x1F
-    CHINESE = CHINESE_SIMPLIFIED | CHINESE_TRADITIONAL
-    CJK = CHINESE | JAPANESE | KOREAN
-
-
-class ProbingState(object):
-    """
-    This enum represents the different states a prober can be in.
-    """
-    DETECTING = 0
-    FOUND_IT = 1
-    NOT_ME = 2
-
-
-class MachineState(object):
-    """
-    This enum represents the different states a state machine can be in.
-    """
-    START = 0
-    ERROR = 1
-    ITS_ME = 2
-
-
-class SequenceLikelihood(object):
-    """
-    This enum represents the likelihood of a character following the previous one.
-    """
-    NEGATIVE = 0
-    UNLIKELY = 1
-    LIKELY = 2
-    POSITIVE = 3
-
-    @classmethod
-    def get_num_categories(cls):
-        """:returns: The number of likelihood categories in the enum."""
-        return 4
-
-
-class CharacterCategory(object):
-    """
-    This enum represents the different categories language models for
-    ``SingleByteCharsetProber`` put characters into.
-
-    Anything less than CONTROL is considered a letter.
-    """
-    UNDEFINED = 255
-    LINE_BREAK = 254
-    SYMBOL = 253
-    DIGIT = 252
-    CONTROL = 251
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/escprober.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/escprober.py
deleted file mode 100644
index c70493f..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/escprober.py
+++ /dev/null
@@ -1,101 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is mozilla.org code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .charsetprober import CharSetProber
-from .codingstatemachine import CodingStateMachine
-from .enums import LanguageFilter, ProbingState, MachineState
-from .escsm import (HZ_SM_MODEL, ISO2022CN_SM_MODEL, ISO2022JP_SM_MODEL,
-                    ISO2022KR_SM_MODEL)
-
-
-class EscCharSetProber(CharSetProber):
-    """
-    This CharSetProber uses a "code scheme" approach for detecting encodings,
-    whereby easily recognizable escape or shift sequences are relied on to
-    identify these encodings.
-    """
-
-    def __init__(self, lang_filter=None):
-        super(EscCharSetProber, self).__init__(lang_filter=lang_filter)
-        self.coding_sm = []
-        if self.lang_filter & LanguageFilter.CHINESE_SIMPLIFIED:
-            self.coding_sm.append(CodingStateMachine(HZ_SM_MODEL))
-            self.coding_sm.append(CodingStateMachine(ISO2022CN_SM_MODEL))
-        if self.lang_filter & LanguageFilter.JAPANESE:
-            self.coding_sm.append(CodingStateMachine(ISO2022JP_SM_MODEL))
-        if self.lang_filter & LanguageFilter.KOREAN:
-            self.coding_sm.append(CodingStateMachine(ISO2022KR_SM_MODEL))
-        self.active_sm_count = None
-        self._detected_charset = None
-        self._detected_language = None
-        self._state = None
-        self.reset()
-
-    def reset(self):
-        super(EscCharSetProber, self).reset()
-        for coding_sm in self.coding_sm:
-            if not coding_sm:
-                continue
-            coding_sm.active = True
-            coding_sm.reset()
-        self.active_sm_count = len(self.coding_sm)
-        self._detected_charset = None
-        self._detected_language = None
-
-    @property
-    def charset_name(self):
-        return self._detected_charset
-
-    @property
-    def language(self):
-        return self._detected_language
-
-    def get_confidence(self):
-        if self._detected_charset:
-            return 0.99
-        else:
-            return 0.00
-
-    def feed(self, byte_str):
-        for c in byte_str:
-            for coding_sm in self.coding_sm:
-                if not coding_sm or not coding_sm.active:
-                    continue
-                coding_state = coding_sm.next_state(c)
-                if coding_state == MachineState.ERROR:
-                    coding_sm.active = False
-                    self.active_sm_count -= 1
-                    if self.active_sm_count <= 0:
-                        self._state = ProbingState.NOT_ME
-                        return self.state
-                elif coding_state == MachineState.ITS_ME:
-                    self._state = ProbingState.FOUND_IT
-                    self._detected_charset = coding_sm.get_coding_state_machine()
-                    self._detected_language = coding_sm.language
-                    return self.state
-
-        return self.state
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/escsm.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/escsm.py
deleted file mode 100644
index 0069523..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/escsm.py
+++ /dev/null
@@ -1,246 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is mozilla.org code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .enums import MachineState
-
-HZ_CLS = (
-1,0,0,0,0,0,0,0,  # 00 - 07
-0,0,0,0,0,0,0,0,  # 08 - 0f
-0,0,0,0,0,0,0,0,  # 10 - 17
-0,0,0,1,0,0,0,0,  # 18 - 1f
-0,0,0,0,0,0,0,0,  # 20 - 27
-0,0,0,0,0,0,0,0,  # 28 - 2f
-0,0,0,0,0,0,0,0,  # 30 - 37
-0,0,0,0,0,0,0,0,  # 38 - 3f
-0,0,0,0,0,0,0,0,  # 40 - 47
-0,0,0,0,0,0,0,0,  # 48 - 4f
-0,0,0,0,0,0,0,0,  # 50 - 57
-0,0,0,0,0,0,0,0,  # 58 - 5f
-0,0,0,0,0,0,0,0,  # 60 - 67
-0,0,0,0,0,0,0,0,  # 68 - 6f
-0,0,0,0,0,0,0,0,  # 70 - 77
-0,0,0,4,0,5,2,0,  # 78 - 7f
-1,1,1,1,1,1,1,1,  # 80 - 87
-1,1,1,1,1,1,1,1,  # 88 - 8f
-1,1,1,1,1,1,1,1,  # 90 - 97
-1,1,1,1,1,1,1,1,  # 98 - 9f
-1,1,1,1,1,1,1,1,  # a0 - a7
-1,1,1,1,1,1,1,1,  # a8 - af
-1,1,1,1,1,1,1,1,  # b0 - b7
-1,1,1,1,1,1,1,1,  # b8 - bf
-1,1,1,1,1,1,1,1,  # c0 - c7
-1,1,1,1,1,1,1,1,  # c8 - cf
-1,1,1,1,1,1,1,1,  # d0 - d7
-1,1,1,1,1,1,1,1,  # d8 - df
-1,1,1,1,1,1,1,1,  # e0 - e7
-1,1,1,1,1,1,1,1,  # e8 - ef
-1,1,1,1,1,1,1,1,  # f0 - f7
-1,1,1,1,1,1,1,1,  # f8 - ff
-)
-
-HZ_ST = (
-MachineState.START,MachineState.ERROR,     3,MachineState.START,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,# 00-07
-MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,# 08-0f
-MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,     4,MachineState.ERROR,# 10-17
-     5,MachineState.ERROR,     6,MachineState.ERROR,     5,     5,     4,MachineState.ERROR,# 18-1f
-     4,MachineState.ERROR,     4,     4,     4,MachineState.ERROR,     4,MachineState.ERROR,# 20-27
-     4,MachineState.ITS_ME,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,# 28-2f
-)
-
-HZ_CHAR_LEN_TABLE = (0, 0, 0, 0, 0, 0)
-
-HZ_SM_MODEL = {'class_table': HZ_CLS,
-               'class_factor': 6,
-               'state_table': HZ_ST,
-               'char_len_table': HZ_CHAR_LEN_TABLE,
-               'name': "HZ-GB-2312",
-               'language': 'Chinese'}
-
-ISO2022CN_CLS = (
-2,0,0,0,0,0,0,0,  # 00 - 07
-0,0,0,0,0,0,0,0,  # 08 - 0f
-0,0,0,0,0,0,0,0,  # 10 - 17
-0,0,0,1,0,0,0,0,  # 18 - 1f
-0,0,0,0,0,0,0,0,  # 20 - 27
-0,3,0,0,0,0,0,0,  # 28 - 2f
-0,0,0,0,0,0,0,0,  # 30 - 37
-0,0,0,0,0,0,0,0,  # 38 - 3f
-0,0,0,4,0,0,0,0,  # 40 - 47
-0,0,0,0,0,0,0,0,  # 48 - 4f
-0,0,0,0,0,0,0,0,  # 50 - 57
-0,0,0,0,0,0,0,0,  # 58 - 5f
-0,0,0,0,0,0,0,0,  # 60 - 67
-0,0,0,0,0,0,0,0,  # 68 - 6f
-0,0,0,0,0,0,0,0,  # 70 - 77
-0,0,0,0,0,0,0,0,  # 78 - 7f
-2,2,2,2,2,2,2,2,  # 80 - 87
-2,2,2,2,2,2,2,2,  # 88 - 8f
-2,2,2,2,2,2,2,2,  # 90 - 97
-2,2,2,2,2,2,2,2,  # 98 - 9f
-2,2,2,2,2,2,2,2,  # a0 - a7
-2,2,2,2,2,2,2,2,  # a8 - af
-2,2,2,2,2,2,2,2,  # b0 - b7
-2,2,2,2,2,2,2,2,  # b8 - bf
-2,2,2,2,2,2,2,2,  # c0 - c7
-2,2,2,2,2,2,2,2,  # c8 - cf
-2,2,2,2,2,2,2,2,  # d0 - d7
-2,2,2,2,2,2,2,2,  # d8 - df
-2,2,2,2,2,2,2,2,  # e0 - e7
-2,2,2,2,2,2,2,2,  # e8 - ef
-2,2,2,2,2,2,2,2,  # f0 - f7
-2,2,2,2,2,2,2,2,  # f8 - ff
-)
-
-ISO2022CN_ST = (
-MachineState.START,     3,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,# 00-07
-MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,# 08-0f
-MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,# 10-17
-MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     4,MachineState.ERROR,# 18-1f
-MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,# 20-27
-     5,     6,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,# 28-2f
-MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,# 30-37
-MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,MachineState.START,# 38-3f
-)
-
-ISO2022CN_CHAR_LEN_TABLE = (0, 0, 0, 0, 0, 0, 0, 0, 0)
-
-ISO2022CN_SM_MODEL = {'class_table': ISO2022CN_CLS,
-                      'class_factor': 9,
-                      'state_table': ISO2022CN_ST,
-                      'char_len_table': ISO2022CN_CHAR_LEN_TABLE,
-                      'name': "ISO-2022-CN",
-                      'language': 'Chinese'}
-
-ISO2022JP_CLS = (
-2,0,0,0,0,0,0,0,  # 00 - 07
-0,0,0,0,0,0,2,2,  # 08 - 0f
-0,0,0,0,0,0,0,0,  # 10 - 17
-0,0,0,1,0,0,0,0,  # 18 - 1f
-0,0,0,0,7,0,0,0,  # 20 - 27
-3,0,0,0,0,0,0,0,  # 28 - 2f
-0,0,0,0,0,0,0,0,  # 30 - 37
-0,0,0,0,0,0,0,0,  # 38 - 3f
-6,0,4,0,8,0,0,0,  # 40 - 47
-0,9,5,0,0,0,0,0,  # 48 - 4f
-0,0,0,0,0,0,0,0,  # 50 - 57
-0,0,0,0,0,0,0,0,  # 58 - 5f
-0,0,0,0,0,0,0,0,  # 60 - 67
-0,0,0,0,0,0,0,0,  # 68 - 6f
-0,0,0,0,0,0,0,0,  # 70 - 77
-0,0,0,0,0,0,0,0,  # 78 - 7f
-2,2,2,2,2,2,2,2,  # 80 - 87
-2,2,2,2,2,2,2,2,  # 88 - 8f
-2,2,2,2,2,2,2,2,  # 90 - 97
-2,2,2,2,2,2,2,2,  # 98 - 9f
-2,2,2,2,2,2,2,2,  # a0 - a7
-2,2,2,2,2,2,2,2,  # a8 - af
-2,2,2,2,2,2,2,2,  # b0 - b7
-2,2,2,2,2,2,2,2,  # b8 - bf
-2,2,2,2,2,2,2,2,  # c0 - c7
-2,2,2,2,2,2,2,2,  # c8 - cf
-2,2,2,2,2,2,2,2,  # d0 - d7
-2,2,2,2,2,2,2,2,  # d8 - df
-2,2,2,2,2,2,2,2,  # e0 - e7
-2,2,2,2,2,2,2,2,  # e8 - ef
-2,2,2,2,2,2,2,2,  # f0 - f7
-2,2,2,2,2,2,2,2,  # f8 - ff
-)
-
-ISO2022JP_ST = (
-MachineState.START,     3,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,# 00-07
-MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,# 08-0f
-MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,# 10-17
-MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,# 18-1f
-MachineState.ERROR,     5,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     4,MachineState.ERROR,MachineState.ERROR,# 20-27
-MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     6,MachineState.ITS_ME,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,# 28-2f
-MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,# 30-37
-MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,# 38-3f
-MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,MachineState.START,MachineState.START,# 40-47
-)
-
-ISO2022JP_CHAR_LEN_TABLE = (0, 0, 0, 0, 0, 0, 0, 0, 0, 0)
-
-ISO2022JP_SM_MODEL = {'class_table': ISO2022JP_CLS,
-                      'class_factor': 10,
-                      'state_table': ISO2022JP_ST,
-                      'char_len_table': ISO2022JP_CHAR_LEN_TABLE,
-                      'name': "ISO-2022-JP",
-                      'language': 'Japanese'}
-
-ISO2022KR_CLS = (
-2,0,0,0,0,0,0,0,  # 00 - 07
-0,0,0,0,0,0,0,0,  # 08 - 0f
-0,0,0,0,0,0,0,0,  # 10 - 17
-0,0,0,1,0,0,0,0,  # 18 - 1f
-0,0,0,0,3,0,0,0,  # 20 - 27
-0,4,0,0,0,0,0,0,  # 28 - 2f
-0,0,0,0,0,0,0,0,  # 30 - 37
-0,0,0,0,0,0,0,0,  # 38 - 3f
-0,0,0,5,0,0,0,0,  # 40 - 47
-0,0,0,0,0,0,0,0,  # 48 - 4f
-0,0,0,0,0,0,0,0,  # 50 - 57
-0,0,0,0,0,0,0,0,  # 58 - 5f
-0,0,0,0,0,0,0,0,  # 60 - 67
-0,0,0,0,0,0,0,0,  # 68 - 6f
-0,0,0,0,0,0,0,0,  # 70 - 77
-0,0,0,0,0,0,0,0,  # 78 - 7f
-2,2,2,2,2,2,2,2,  # 80 - 87
-2,2,2,2,2,2,2,2,  # 88 - 8f
-2,2,2,2,2,2,2,2,  # 90 - 97
-2,2,2,2,2,2,2,2,  # 98 - 9f
-2,2,2,2,2,2,2,2,  # a0 - a7
-2,2,2,2,2,2,2,2,  # a8 - af
-2,2,2,2,2,2,2,2,  # b0 - b7
-2,2,2,2,2,2,2,2,  # b8 - bf
-2,2,2,2,2,2,2,2,  # c0 - c7
-2,2,2,2,2,2,2,2,  # c8 - cf
-2,2,2,2,2,2,2,2,  # d0 - d7
-2,2,2,2,2,2,2,2,  # d8 - df
-2,2,2,2,2,2,2,2,  # e0 - e7
-2,2,2,2,2,2,2,2,  # e8 - ef
-2,2,2,2,2,2,2,2,  # f0 - f7
-2,2,2,2,2,2,2,2,  # f8 - ff
-)
-
-ISO2022KR_ST = (
-MachineState.START,     3,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,# 00-07
-MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,# 08-0f
-MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     4,MachineState.ERROR,MachineState.ERROR,# 10-17
-MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     5,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,# 18-1f
-MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.START,MachineState.START,MachineState.START,MachineState.START,# 20-27
-)
-
-ISO2022KR_CHAR_LEN_TABLE = (0, 0, 0, 0, 0, 0)
-
-ISO2022KR_SM_MODEL = {'class_table': ISO2022KR_CLS,
-                      'class_factor': 6,
-                      'state_table': ISO2022KR_ST,
-                      'char_len_table': ISO2022KR_CHAR_LEN_TABLE,
-                      'name': "ISO-2022-KR",
-                      'language': 'Korean'}
-
-
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/eucjpprober.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/eucjpprober.py
deleted file mode 100644
index 20ce8f7..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/eucjpprober.py
+++ /dev/null
@@ -1,92 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is mozilla.org code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .enums import ProbingState, MachineState
-from .mbcharsetprober import MultiByteCharSetProber
-from .codingstatemachine import CodingStateMachine
-from .chardistribution import EUCJPDistributionAnalysis
-from .jpcntx import EUCJPContextAnalysis
-from .mbcssm import EUCJP_SM_MODEL
-
-
-class EUCJPProber(MultiByteCharSetProber):
-    def __init__(self):
-        super(EUCJPProber, self).__init__()
-        self.coding_sm = CodingStateMachine(EUCJP_SM_MODEL)
-        self.distribution_analyzer = EUCJPDistributionAnalysis()
-        self.context_analyzer = EUCJPContextAnalysis()
-        self.reset()
-
-    def reset(self):
-        super(EUCJPProber, self).reset()
-        self.context_analyzer.reset()
-
-    @property
-    def charset_name(self):
-        return "EUC-JP"
-
-    @property
-    def language(self):
-        return "Japanese"
-
-    def feed(self, byte_str):
-        for i in range(len(byte_str)):
-            # PY3K: byte_str is a byte array, so byte_str[i] is an int, not a byte
-            coding_state = self.coding_sm.next_state(byte_str[i])
-            if coding_state == MachineState.ERROR:
-                self.logger.debug('%s %s prober hit error at byte %s',
-                                  self.charset_name, self.language, i)
-                self._state = ProbingState.NOT_ME
-                break
-            elif coding_state == MachineState.ITS_ME:
-                self._state = ProbingState.FOUND_IT
-                break
-            elif coding_state == MachineState.START:
-                char_len = self.coding_sm.get_current_charlen()
-                if i == 0:
-                    self._last_char[1] = byte_str[0]
-                    self.context_analyzer.feed(self._last_char, char_len)
-                    self.distribution_analyzer.feed(self._last_char, char_len)
-                else:
-                    self.context_analyzer.feed(byte_str[i - 1:i + 1],
-                                                char_len)
-                    self.distribution_analyzer.feed(byte_str[i - 1:i + 1],
-                                                     char_len)
-
-        self._last_char[0] = byte_str[-1]
-
-        if self.state == ProbingState.DETECTING:
-            if (self.context_analyzer.got_enough_data() and
-               (self.get_confidence() > self.SHORTCUT_THRESHOLD)):
-                self._state = ProbingState.FOUND_IT
-
-        return self.state
-
-    def get_confidence(self):
-        context_conf = self.context_analyzer.get_confidence()
-        distrib_conf = self.distribution_analyzer.get_confidence()
-        return max(context_conf, distrib_conf)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/euckrfreq.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/euckrfreq.py
deleted file mode 100644
index b68078c..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/euckrfreq.py
+++ /dev/null
@@ -1,195 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-# Sampling from about 20M text materials include literature and computer technology
-
-# 128  --> 0.79
-# 256  --> 0.92
-# 512  --> 0.986
-# 1024 --> 0.99944
-# 2048 --> 0.99999
-#
-# Idea Distribution Ratio = 0.98653 / (1-0.98653) = 73.24
-# Random Distribution Ration = 512 / (2350-512) = 0.279.
-#
-# Typical Distribution Ratio
-
-EUCKR_TYPICAL_DISTRIBUTION_RATIO = 6.0
-
-EUCKR_TABLE_SIZE = 2352
-
-# Char to FreqOrder table ,
-EUCKR_CHAR_TO_FREQ_ORDER = (
-  13, 130, 120,1396, 481,1719,1720, 328, 609, 212,1721, 707, 400, 299,1722,  87,
-1397,1723, 104, 536,1117,1203,1724,1267, 685,1268, 508,1725,1726,1727,1728,1398,
-1399,1729,1730,1731, 141, 621, 326,1057, 368,1732, 267, 488,  20,1733,1269,1734,
- 945,1400,1735,  47, 904,1270,1736,1737, 773, 248,1738, 409, 313, 786, 429,1739,
- 116, 987, 813,1401, 683,  75,1204, 145,1740,1741,1742,1743,  16, 847, 667, 622,
- 708,1744,1745,1746, 966, 787, 304, 129,1747,  60, 820, 123, 676,1748,1749,1750,
-1751, 617,1752, 626,1753,1754,1755,1756, 653,1757,1758,1759,1760,1761,1762, 856,
- 344,1763,1764,1765,1766,  89, 401, 418, 806, 905, 848,1767,1768,1769, 946,1205,
- 709,1770,1118,1771, 241,1772,1773,1774,1271,1775, 569,1776, 999,1777,1778,1779,
-1780, 337, 751,1058,  28, 628, 254,1781, 177, 906, 270, 349, 891,1079,1782,  19,
-1783, 379,1784, 315,1785, 629, 754,1402, 559,1786, 636, 203,1206,1787, 710, 567,
-1788, 935, 814,1789,1790,1207, 766, 528,1791,1792,1208,1793,1794,1795,1796,1797,
-1403,1798,1799, 533,1059,1404,1405,1156,1406, 936, 884,1080,1800, 351,1801,1802,
-1803,1804,1805, 801,1806,1807,1808,1119,1809,1157, 714, 474,1407,1810, 298, 899,
- 885,1811,1120, 802,1158,1812, 892,1813,1814,1408, 659,1815,1816,1121,1817,1818,
-1819,1820,1821,1822, 319,1823, 594, 545,1824, 815, 937,1209,1825,1826, 573,1409,
-1022,1827,1210,1828,1829,1830,1831,1832,1833, 556, 722, 807,1122,1060,1834, 697,
-1835, 900, 557, 715,1836,1410, 540,1411, 752,1159, 294, 597,1211, 976, 803, 770,
-1412,1837,1838,  39, 794,1413, 358,1839, 371, 925,1840, 453, 661, 788, 531, 723,
- 544,1023,1081, 869,  91,1841, 392, 430, 790, 602,1414, 677,1082, 457,1415,1416,
-1842,1843, 475, 327,1024,1417, 795, 121,1844, 733, 403,1418,1845,1846,1847, 300,
- 119, 711,1212, 627,1848,1272, 207,1849,1850, 796,1213, 382,1851, 519,1852,1083,
- 893,1853,1854,1855, 367, 809, 487, 671,1856, 663,1857,1858, 956, 471, 306, 857,
-1859,1860,1160,1084,1861,1862,1863,1864,1865,1061,1866,1867,1868,1869,1870,1871,
- 282,  96, 574,1872, 502,1085,1873,1214,1874, 907,1875,1876, 827, 977,1419,1420,
-1421, 268,1877,1422,1878,1879,1880, 308,1881,   2, 537,1882,1883,1215,1884,1885,
- 127, 791,1886,1273,1423,1887,  34, 336, 404, 643,1888, 571, 654, 894, 840,1889,
-   0, 886,1274, 122, 575, 260, 908, 938,1890,1275, 410, 316,1891,1892, 100,1893,
-1894,1123,  48,1161,1124,1025,1895, 633, 901,1276,1896,1897, 115, 816,1898, 317,
-1899, 694,1900, 909, 734,1424, 572, 866,1425, 691,  85, 524,1010, 543, 394, 841,
-1901,1902,1903,1026,1904,1905,1906,1907,1908,1909,  30, 451, 651, 988, 310,1910,
-1911,1426, 810,1216,  93,1912,1913,1277,1217,1914, 858, 759,  45,  58, 181, 610,
- 269,1915,1916, 131,1062, 551, 443,1000, 821,1427, 957, 895,1086,1917,1918, 375,
-1919, 359,1920, 687,1921, 822,1922, 293,1923,1924,  40, 662, 118, 692,  29, 939,
- 887, 640, 482, 174,1925,  69,1162, 728,1428, 910,1926,1278,1218,1279, 386, 870,
- 217, 854,1163, 823,1927,1928,1929,1930, 834,1931,  78,1932, 859,1933,1063,1934,
-1935,1936,1937, 438,1164, 208, 595,1938,1939,1940,1941,1219,1125,1942, 280, 888,
-1429,1430,1220,1431,1943,1944,1945,1946,1947,1280, 150, 510,1432,1948,1949,1950,
-1951,1952,1953,1954,1011,1087,1955,1433,1043,1956, 881,1957, 614, 958,1064,1065,
-1221,1958, 638,1001, 860, 967, 896,1434, 989, 492, 553,1281,1165,1959,1282,1002,
-1283,1222,1960,1961,1962,1963,  36, 383, 228, 753, 247, 454,1964, 876, 678,1965,
-1966,1284, 126, 464, 490, 835, 136, 672, 529, 940,1088,1435, 473,1967,1968, 467,
-  50, 390, 227, 587, 279, 378, 598, 792, 968, 240, 151, 160, 849, 882,1126,1285,
- 639,1044, 133, 140, 288, 360, 811, 563,1027, 561, 142, 523,1969,1970,1971,   7,
- 103, 296, 439, 407, 506, 634, 990,1972,1973,1974,1975, 645,1976,1977,1978,1979,
-1980,1981, 236,1982,1436,1983,1984,1089, 192, 828, 618, 518,1166, 333,1127,1985,
- 818,1223,1986,1987,1988,1989,1990,1991,1992,1993, 342,1128,1286, 746, 842,1994,
-1995, 560, 223,1287,  98,   8, 189, 650, 978,1288,1996,1437,1997,  17, 345, 250,
- 423, 277, 234, 512, 226,  97, 289,  42, 167,1998, 201,1999,2000, 843, 836, 824,
- 532, 338, 783,1090, 182, 576, 436,1438,1439, 527, 500,2001, 947, 889,2002,2003,
-2004,2005, 262, 600, 314, 447,2006, 547,2007, 693, 738,1129,2008,  71,1440, 745,
- 619, 688,2009, 829,2010,2011, 147,2012,  33, 948,2013,2014,  74, 224,2015,  61,
- 191, 918, 399, 637,2016,1028,1130, 257, 902,2017,2018,2019,2020,2021,2022,2023,
-2024,2025,2026, 837,2027,2028,2029,2030, 179, 874, 591,  52, 724, 246,2031,2032,
-2033,2034,1167, 969,2035,1289, 630, 605, 911,1091,1168,2036,2037,2038,1441, 912,
-2039, 623,2040,2041, 253,1169,1290,2042,1442, 146, 620, 611, 577, 433,2043,1224,
- 719,1170, 959, 440, 437, 534,  84, 388, 480,1131, 159, 220, 198, 679,2044,1012,
- 819,1066,1443, 113,1225, 194, 318,1003,1029,2045,2046,2047,2048,1067,2049,2050,
-2051,2052,2053,  59, 913, 112,2054, 632,2055, 455, 144, 739,1291,2056, 273, 681,
- 499,2057, 448,2058,2059, 760,2060,2061, 970, 384, 169, 245,1132,2062,2063, 414,
-1444,2064,2065,  41, 235,2066, 157, 252, 877, 568, 919, 789, 580,2067, 725,2068,
-2069,1292,2070,2071,1445,2072,1446,2073,2074,  55, 588,  66,1447, 271,1092,2075,
-1226,2076, 960,1013, 372,2077,2078,2079,2080,2081,1293,2082,2083,2084,2085, 850,
-2086,2087,2088,2089,2090, 186,2091,1068, 180,2092,2093,2094, 109,1227, 522, 606,
-2095, 867,1448,1093, 991,1171, 926, 353,1133,2096, 581,2097,2098,2099,1294,1449,
-1450,2100, 596,1172,1014,1228,2101,1451,1295,1173,1229,2102,2103,1296,1134,1452,
- 949,1135,2104,2105,1094,1453,1454,1455,2106,1095,2107,2108,2109,2110,2111,2112,
-2113,2114,2115,2116,2117, 804,2118,2119,1230,1231, 805,1456, 405,1136,2120,2121,
-2122,2123,2124, 720, 701,1297, 992,1457, 927,1004,2125,2126,2127,2128,2129,2130,
-  22, 417,2131, 303,2132, 385,2133, 971, 520, 513,2134,1174,  73,1096, 231, 274,
- 962,1458, 673,2135,1459,2136, 152,1137,2137,2138,2139,2140,1005,1138,1460,1139,
-2141,2142,2143,2144,  11, 374, 844,2145, 154,1232,  46,1461,2146, 838, 830, 721,
-1233, 106,2147,  90, 428, 462, 578, 566,1175, 352,2148,2149, 538,1234, 124,1298,
-2150,1462, 761, 565,2151, 686,2152, 649,2153,  72, 173,2154, 460, 415,2155,1463,
-2156,1235, 305,2157,2158,2159,2160,2161,2162, 579,2163,2164,2165,2166,2167, 747,
-2168,2169,2170,2171,1464, 669,2172,2173,2174,2175,2176,1465,2177,  23, 530, 285,
-2178, 335, 729,2179, 397,2180,2181,2182,1030,2183,2184, 698,2185,2186, 325,2187,
-2188, 369,2189, 799,1097,1015, 348,2190,1069, 680,2191, 851,1466,2192,2193,  10,
-2194, 613, 424,2195, 979, 108, 449, 589,  27, 172,  81,1031,  80, 774, 281, 350,
-1032, 525, 301, 582,1176,2196, 674,1045,2197,2198,1467, 730, 762,2199,2200,2201,
-2202,1468,2203, 993,2204,2205, 266,1070, 963,1140,2206,2207,2208, 664,1098, 972,
-2209,2210,2211,1177,1469,1470, 871,2212,2213,2214,2215,2216,1471,2217,2218,2219,
-2220,2221,2222,2223,2224,2225,2226,2227,1472,1236,2228,2229,2230,2231,2232,2233,
-2234,2235,1299,2236,2237, 200,2238, 477, 373,2239,2240, 731, 825, 777,2241,2242,
-2243, 521, 486, 548,2244,2245,2246,1473,1300,  53, 549, 137, 875,  76, 158,2247,
-1301,1474, 469, 396,1016, 278, 712,2248, 321, 442, 503, 767, 744, 941,1237,1178,
-1475,2249,  82, 178,1141,1179, 973,2250,1302,2251, 297,2252,2253, 570,2254,2255,
-2256,  18, 450, 206,2257, 290, 292,1142,2258, 511, 162,  99, 346, 164, 735,2259,
-1476,1477,   4, 554, 343, 798,1099,2260,1100,2261,  43, 171,1303, 139, 215,2262,
-2263, 717, 775,2264,1033, 322, 216,2265, 831,2266, 149,2267,1304,2268,2269, 702,
-1238, 135, 845, 347, 309,2270, 484,2271, 878, 655, 238,1006,1478,2272,  67,2273,
- 295,2274,2275, 461,2276, 478, 942, 412,2277,1034,2278,2279,2280, 265,2281, 541,
-2282,2283,2284,2285,2286,  70, 852,1071,2287,2288,2289,2290,  21,  56, 509, 117,
- 432,2291,2292, 331, 980, 552,1101, 148, 284, 105, 393,1180,1239, 755,2293, 187,
-2294,1046,1479,2295, 340,2296,  63,1047, 230,2297,2298,1305, 763,1306, 101, 800,
- 808, 494,2299,2300,2301, 903,2302,  37,1072,  14,   5,2303,  79, 675,2304, 312,
-2305,2306,2307,2308,2309,1480,   6,1307,2310,2311,2312,   1, 470,  35,  24, 229,
-2313, 695, 210,  86, 778,  15, 784, 592, 779,  32,  77, 855, 964,2314, 259,2315,
- 501, 380,2316,2317,  83, 981, 153, 689,1308,1481,1482,1483,2318,2319, 716,1484,
-2320,2321,2322,2323,2324,2325,1485,2326,2327, 128,  57,  68, 261,1048, 211, 170,
-1240,  31,2328,  51, 435, 742,2329,2330,2331, 635,2332, 264, 456,2333,2334,2335,
- 425,2336,1486, 143, 507, 263, 943,2337, 363, 920,1487, 256,1488,1102, 243, 601,
-1489,2338,2339,2340,2341,2342,2343,2344, 861,2345,2346,2347,2348,2349,2350, 395,
-2351,1490,1491,  62, 535, 166, 225,2352,2353, 668, 419,1241, 138, 604, 928,2354,
-1181,2355,1492,1493,2356,2357,2358,1143,2359, 696,2360, 387, 307,1309, 682, 476,
-2361,2362, 332,  12, 222, 156,2363, 232,2364, 641, 276, 656, 517,1494,1495,1035,
- 416, 736,1496,2365,1017, 586,2366,2367,2368,1497,2369, 242,2370,2371,2372,1498,
-2373, 965, 713,2374,2375,2376,2377, 740, 982,1499, 944,1500,1007,2378,2379,1310,
-1501,2380,2381,2382, 785, 329,2383,2384,1502,2385,2386,2387, 932,2388,1503,2389,
-2390,2391,2392,1242,2393,2394,2395,2396,2397, 994, 950,2398,2399,2400,2401,1504,
-1311,2402,2403,2404,2405,1049, 749,2406,2407, 853, 718,1144,1312,2408,1182,1505,
-2409,2410, 255, 516, 479, 564, 550, 214,1506,1507,1313, 413, 239, 444, 339,1145,
-1036,1508,1509,1314,1037,1510,1315,2411,1511,2412,2413,2414, 176, 703, 497, 624,
- 593, 921, 302,2415, 341, 165,1103,1512,2416,1513,2417,2418,2419, 376,2420, 700,
-2421,2422,2423, 258, 768,1316,2424,1183,2425, 995, 608,2426,2427,2428,2429, 221,
-2430,2431,2432,2433,2434,2435,2436,2437, 195, 323, 726, 188, 897, 983,1317, 377,
- 644,1050, 879,2438, 452,2439,2440,2441,2442,2443,2444, 914,2445,2446,2447,2448,
- 915, 489,2449,1514,1184,2450,2451, 515,  64, 427, 495,2452, 583,2453, 483, 485,
-1038, 562, 213,1515, 748, 666,2454,2455,2456,2457, 334,2458, 780, 996,1008, 705,
-1243,2459,2460,2461,2462,2463, 114,2464, 493,1146, 366, 163,1516, 961,1104,2465,
- 291,2466,1318,1105,2467,1517, 365,2468, 355, 951,1244,2469,1319,2470, 631,2471,
-2472, 218,1320, 364, 320, 756,1518,1519,1321,1520,1322,2473,2474,2475,2476, 997,
-2477,2478,2479,2480, 665,1185,2481, 916,1521,2482,2483,2484, 584, 684,2485,2486,
- 797,2487,1051,1186,2488,2489,2490,1522,2491,2492, 370,2493,1039,1187,  65,2494,
- 434, 205, 463,1188,2495, 125, 812, 391, 402, 826, 699, 286, 398, 155, 781, 771,
- 585,2496, 590, 505,1073,2497, 599, 244, 219, 917,1018, 952, 646,1523,2498,1323,
-2499,2500,  49, 984, 354, 741,2501, 625,2502,1324,2503,1019, 190, 357, 757, 491,
-  95, 782, 868,2504,2505,2506,2507,2508,2509, 134,1524,1074, 422,1525, 898,2510,
- 161,2511,2512,2513,2514, 769,2515,1526,2516,2517, 411,1325,2518, 472,1527,2519,
-2520,2521,2522,2523,2524, 985,2525,2526,2527,2528,2529,2530, 764,2531,1245,2532,
-2533,  25, 204, 311,2534, 496,2535,1052,2536,2537,2538,2539,2540,2541,2542, 199,
- 704, 504, 468, 758, 657,1528, 196,  44, 839,1246, 272, 750,2543, 765, 862,2544,
-2545,1326,2546, 132, 615, 933,2547, 732,2548,2549,2550,1189,1529,2551, 283,1247,
-1053, 607, 929,2552,2553,2554, 930, 183, 872, 616,1040,1147,2555,1148,1020, 441,
- 249,1075,2556,2557,2558, 466, 743,2559,2560,2561,  92, 514, 426, 420, 526,2562,
-2563,2564,2565,2566,2567,2568, 185,2569,2570,2571,2572, 776,1530, 658,2573, 362,
-2574, 361, 922,1076, 793,2575,2576,2577,2578,2579,2580,1531, 251,2581,2582,2583,
-2584,1532,  54, 612, 237,1327,2585,2586, 275, 408, 647, 111,2587,1533,1106, 465,
-   3, 458,   9,  38,2588, 107, 110, 890, 209,  26, 737, 498,2589,1534,2590, 431,
- 202,  88,1535, 356, 287,1107, 660,1149,2591, 381,1536, 986,1150, 445,1248,1151,
- 974,2592,2593, 846,2594, 446, 953, 184,1249,1250, 727,2595, 923, 193, 883,2596,
-2597,2598, 102, 324, 539, 817,2599, 421,1041,2600, 832,2601,  94, 175, 197, 406,
-2602, 459,2603,2604,2605,2606,2607, 330, 555,2608,2609,2610, 706,1108, 389,2611,
-2612,2613,2614, 233,2615, 833, 558, 931, 954,1251,2616,2617,1537, 546,2618,2619,
-1009,2620,2621,2622,1538, 690,1328,2623, 955,2624,1539,2625,2626, 772,2627,2628,
-2629,2630,2631, 924, 648, 863, 603,2632,2633, 934,1540, 864, 865,2634, 642,1042,
- 670,1190,2635,2636,2637,2638, 168,2639, 652, 873, 542,1054,1541,2640,2641,2642,  # 512, 256
-)
-
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/euckrprober.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/euckrprober.py
deleted file mode 100644
index 345a060..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/euckrprober.py
+++ /dev/null
@@ -1,47 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is mozilla.org code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .mbcharsetprober import MultiByteCharSetProber
-from .codingstatemachine import CodingStateMachine
-from .chardistribution import EUCKRDistributionAnalysis
-from .mbcssm import EUCKR_SM_MODEL
-
-
-class EUCKRProber(MultiByteCharSetProber):
-    def __init__(self):
-        super(EUCKRProber, self).__init__()
-        self.coding_sm = CodingStateMachine(EUCKR_SM_MODEL)
-        self.distribution_analyzer = EUCKRDistributionAnalysis()
-        self.reset()
-
-    @property
-    def charset_name(self):
-        return "EUC-KR"
-
-    @property
-    def language(self):
-        return "Korean"
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/euctwfreq.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/euctwfreq.py
deleted file mode 100644
index ed7a995..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/euctwfreq.py
+++ /dev/null
@@ -1,387 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-# EUCTW frequency table
-# Converted from big5 work
-# by Taiwan's Mandarin Promotion Council
-# <http:#www.edu.tw:81/mandr/>
-
-# 128  --> 0.42261
-# 256  --> 0.57851
-# 512  --> 0.74851
-# 1024 --> 0.89384
-# 2048 --> 0.97583
-#
-# Idea Distribution Ratio = 0.74851/(1-0.74851) =2.98
-# Random Distribution Ration = 512/(5401-512)=0.105
-#
-# Typical Distribution Ratio about 25% of Ideal one, still much higher than RDR
-
-EUCTW_TYPICAL_DISTRIBUTION_RATIO = 0.75
-
-# Char to FreqOrder table ,
-EUCTW_TABLE_SIZE = 5376
-
-EUCTW_CHAR_TO_FREQ_ORDER = (
-   1,1800,1506, 255,1431, 198,   9,  82,   6,7310, 177, 202,3615,1256,2808, 110,  # 2742
-3735,  33,3241, 261,  76,  44,2113,  16,2931,2184,1176, 659,3868,  26,3404,2643,  # 2758
-1198,3869,3313,4060, 410,2211, 302, 590, 361,1963,   8, 204,  58,4296,7311,1931,  # 2774
-  63,7312,7313, 317,1614,  75, 222, 159,4061,2412,1480,7314,3500,3068, 224,2809,  # 2790
-3616,   3,  10,3870,1471,  29,2774,1135,2852,1939, 873, 130,3242,1123, 312,7315,  # 2806
-4297,2051, 507, 252, 682,7316, 142,1914, 124, 206,2932,  34,3501,3173,  64, 604,  # 2822
-7317,2494,1976,1977, 155,1990, 645, 641,1606,7318,3405, 337,  72, 406,7319,  80,  # 2838
- 630, 238,3174,1509, 263, 939,1092,2644, 756,1440,1094,3406, 449,  69,2969, 591,  # 2854
- 179,2095, 471, 115,2034,1843,  60,  50,2970, 134, 806,1868, 734,2035,3407, 180,  # 2870
- 995,1607, 156, 537,2893, 688,7320, 319,1305, 779,2144, 514,2374, 298,4298, 359,  # 2886
-2495,  90,2707,1338, 663,  11, 906,1099,2545,  20,2436, 182, 532,1716,7321, 732,  # 2902
-1376,4062,1311,1420,3175,  25,2312,1056, 113, 399, 382,1949, 242,3408,2467, 529,  # 2918
-3243, 475,1447,3617,7322, 117,  21, 656, 810,1297,2295,2329,3502,7323, 126,4063,  # 2934
- 706, 456, 150, 613,4299,  71,1118,2036,4064, 145,3069,  85, 835, 486,2114,1246,  # 2950
-1426, 428, 727,1285,1015, 800, 106, 623, 303,1281,7324,2127,2354, 347,3736, 221,  # 2966
-3503,3110,7325,1955,1153,4065,  83, 296,1199,3070, 192, 624,  93,7326, 822,1897,  # 2982
-2810,3111, 795,2064, 991,1554,1542,1592,  27,  43,2853, 859, 139,1456, 860,4300,  # 2998
- 437, 712,3871, 164,2392,3112, 695, 211,3017,2096, 195,3872,1608,3504,3505,3618,  # 3014
-3873, 234, 811,2971,2097,3874,2229,1441,3506,1615,2375, 668,2076,1638, 305, 228,  # 3030
-1664,4301, 467, 415,7327, 262,2098,1593, 239, 108, 300, 200,1033, 512,1247,2077,  # 3046
-7328,7329,2173,3176,3619,2673, 593, 845,1062,3244,  88,1723,2037,3875,1950, 212,  # 3062
- 266, 152, 149, 468,1898,4066,4302,  77, 187,7330,3018,  37,   5,2972,7331,3876,  # 3078
-7332,7333,  39,2517,4303,2894,3177,2078,  55, 148,  74,4304, 545, 483,1474,1029,  # 3094
-1665, 217,1869,1531,3113,1104,2645,4067,  24, 172,3507, 900,3877,3508,3509,4305,  # 3110
-  32,1408,2811,1312, 329, 487,2355,2247,2708, 784,2674,   4,3019,3314,1427,1788,  # 3126
- 188, 109, 499,7334,3620,1717,1789, 888,1217,3020,4306,7335,3510,7336,3315,1520,  # 3142
-3621,3878, 196,1034, 775,7337,7338, 929,1815, 249, 439,  38,7339,1063,7340, 794,  # 3158
-3879,1435,2296,  46, 178,3245,2065,7341,2376,7342, 214,1709,4307, 804,  35, 707,  # 3174
- 324,3622,1601,2546, 140, 459,4068,7343,7344,1365, 839, 272, 978,2257,2572,3409,  # 3190
-2128,1363,3623,1423, 697, 100,3071,  48,  70,1231, 495,3114,2193,7345,1294,7346,  # 3206
-2079, 462, 586,1042,3246, 853, 256, 988, 185,2377,3410,1698, 434,1084,7347,3411,  # 3222
- 314,2615,2775,4308,2330,2331, 569,2280, 637,1816,2518, 757,1162,1878,1616,3412,  # 3238
- 287,1577,2115, 768,4309,1671,2854,3511,2519,1321,3737, 909,2413,7348,4069, 933,  # 3254
-3738,7349,2052,2356,1222,4310, 765,2414,1322, 786,4311,7350,1919,1462,1677,2895,  # 3270
-1699,7351,4312,1424,2437,3115,3624,2590,3316,1774,1940,3413,3880,4070, 309,1369,  # 3286
-1130,2812, 364,2230,1653,1299,3881,3512,3882,3883,2646, 525,1085,3021, 902,2000,  # 3302
-1475, 964,4313, 421,1844,1415,1057,2281, 940,1364,3116, 376,4314,4315,1381,   7,  # 3318
-2520, 983,2378, 336,1710,2675,1845, 321,3414, 559,1131,3022,2742,1808,1132,1313,  # 3334
- 265,1481,1857,7352, 352,1203,2813,3247, 167,1089, 420,2814, 776, 792,1724,3513,  # 3350
-4071,2438,3248,7353,4072,7354, 446, 229, 333,2743, 901,3739,1200,1557,4316,2647,  # 3366
-1920, 395,2744,2676,3740,4073,1835, 125, 916,3178,2616,4317,7355,7356,3741,7357,  # 3382
-7358,7359,4318,3117,3625,1133,2547,1757,3415,1510,2313,1409,3514,7360,2145, 438,  # 3398
-2591,2896,2379,3317,1068, 958,3023, 461, 311,2855,2677,4074,1915,3179,4075,1978,  # 3414
- 383, 750,2745,2617,4076, 274, 539, 385,1278,1442,7361,1154,1964, 384, 561, 210,  # 3430
-  98,1295,2548,3515,7362,1711,2415,1482,3416,3884,2897,1257, 129,7363,3742, 642,  # 3446
- 523,2776,2777,2648,7364, 141,2231,1333,  68, 176, 441, 876, 907,4077, 603,2592,  # 3462
- 710, 171,3417, 404, 549,  18,3118,2393,1410,3626,1666,7365,3516,4319,2898,4320,  # 3478
-7366,2973, 368,7367, 146, 366,  99, 871,3627,1543, 748, 807,1586,1185,  22,2258,  # 3494
- 379,3743,3180,7368,3181, 505,1941,2618,1991,1382,2314,7369, 380,2357, 218, 702,  # 3510
-1817,1248,3418,3024,3517,3318,3249,7370,2974,3628, 930,3250,3744,7371,  59,7372,  # 3526
- 585, 601,4078, 497,3419,1112,1314,4321,1801,7373,1223,1472,2174,7374, 749,1836,  # 3542
- 690,1899,3745,1772,3885,1476, 429,1043,1790,2232,2116, 917,4079, 447,1086,1629,  # 3558
-7375, 556,7376,7377,2020,1654, 844,1090, 105, 550, 966,1758,2815,1008,1782, 686,  # 3574
-1095,7378,2282, 793,1602,7379,3518,2593,4322,4080,2933,2297,4323,3746, 980,2496,  # 3590
- 544, 353, 527,4324, 908,2678,2899,7380, 381,2619,1942,1348,7381,1341,1252, 560,  # 3606
-3072,7382,3420,2856,7383,2053, 973, 886,2080, 143,4325,7384,7385, 157,3886, 496,  # 3622
-4081,  57, 840, 540,2038,4326,4327,3421,2117,1445, 970,2259,1748,1965,2081,4082,  # 3638
-3119,1234,1775,3251,2816,3629, 773,1206,2129,1066,2039,1326,3887,1738,1725,4083,  # 3654
- 279,3120,  51,1544,2594, 423,1578,2130,2066, 173,4328,1879,7386,7387,1583, 264,  # 3670
- 610,3630,4329,2439, 280, 154,7388,7389,7390,1739, 338,1282,3073, 693,2857,1411,  # 3686
-1074,3747,2440,7391,4330,7392,7393,1240, 952,2394,7394,2900,1538,2679, 685,1483,  # 3702
-4084,2468,1436, 953,4085,2054,4331, 671,2395,  79,4086,2441,3252, 608, 567,2680,  # 3718
-3422,4087,4088,1691, 393,1261,1791,2396,7395,4332,7396,7397,7398,7399,1383,1672,  # 3734
-3748,3182,1464, 522,1119, 661,1150, 216, 675,4333,3888,1432,3519, 609,4334,2681,  # 3750
-2397,7400,7401,7402,4089,3025,   0,7403,2469, 315, 231,2442, 301,3319,4335,2380,  # 3766
-7404, 233,4090,3631,1818,4336,4337,7405,  96,1776,1315,2082,7406, 257,7407,1809,  # 3782
-3632,2709,1139,1819,4091,2021,1124,2163,2778,1777,2649,7408,3074, 363,1655,3183,  # 3798
-7409,2975,7410,7411,7412,3889,1567,3890, 718, 103,3184, 849,1443, 341,3320,2934,  # 3814
-1484,7413,1712, 127,  67, 339,4092,2398, 679,1412, 821,7414,7415, 834, 738, 351,  # 3830
-2976,2146, 846, 235,1497,1880, 418,1992,3749,2710, 186,1100,2147,2746,3520,1545,  # 3846
-1355,2935,2858,1377, 583,3891,4093,2573,2977,7416,1298,3633,1078,2549,3634,2358,  # 3862
-  78,3750,3751, 267,1289,2099,2001,1594,4094, 348, 369,1274,2194,2175,1837,4338,  # 3878
-1820,2817,3635,2747,2283,2002,4339,2936,2748, 144,3321, 882,4340,3892,2749,3423,  # 3894
-4341,2901,7417,4095,1726, 320,7418,3893,3026, 788,2978,7419,2818,1773,1327,2859,  # 3910
-3894,2819,7420,1306,4342,2003,1700,3752,3521,2359,2650, 787,2022, 506, 824,3636,  # 3926
- 534, 323,4343,1044,3322,2023,1900, 946,3424,7421,1778,1500,1678,7422,1881,4344,  # 3942
- 165, 243,4345,3637,2521, 123, 683,4096, 764,4346,  36,3895,1792, 589,2902, 816,  # 3958
- 626,1667,3027,2233,1639,1555,1622,3753,3896,7423,3897,2860,1370,1228,1932, 891,  # 3974
-2083,2903, 304,4097,7424, 292,2979,2711,3522, 691,2100,4098,1115,4347, 118, 662,  # 3990
-7425, 611,1156, 854,2381,1316,2861,   2, 386, 515,2904,7426,7427,3253, 868,2234,  # 4006
-1486, 855,2651, 785,2212,3028,7428,1040,3185,3523,7429,3121, 448,7430,1525,7431,  # 4022
-2164,4348,7432,3754,7433,4099,2820,3524,3122, 503, 818,3898,3123,1568, 814, 676,  # 4038
-1444, 306,1749,7434,3755,1416,1030, 197,1428, 805,2821,1501,4349,7435,7436,7437,  # 4054
-1993,7438,4350,7439,7440,2195,  13,2779,3638,2980,3124,1229,1916,7441,3756,2131,  # 4070
-7442,4100,4351,2399,3525,7443,2213,1511,1727,1120,7444,7445, 646,3757,2443, 307,  # 4086
-7446,7447,1595,3186,7448,7449,7450,3639,1113,1356,3899,1465,2522,2523,7451, 519,  # 4102
-7452, 128,2132,  92,2284,1979,7453,3900,1512, 342,3125,2196,7454,2780,2214,1980,  # 4118
-3323,7455, 290,1656,1317, 789, 827,2360,7456,3758,4352, 562, 581,3901,7457, 401,  # 4134
-4353,2248,  94,4354,1399,2781,7458,1463,2024,4355,3187,1943,7459, 828,1105,4101,  # 4150
-1262,1394,7460,4102, 605,4356,7461,1783,2862,7462,2822, 819,2101, 578,2197,2937,  # 4166
-7463,1502, 436,3254,4103,3255,2823,3902,2905,3425,3426,7464,2712,2315,7465,7466,  # 4182
-2332,2067,  23,4357, 193, 826,3759,2102, 699,1630,4104,3075, 390,1793,1064,3526,  # 4198
-7467,1579,3076,3077,1400,7468,4105,1838,1640,2863,7469,4358,4359, 137,4106, 598,  # 4214
-3078,1966, 780, 104, 974,2938,7470, 278, 899, 253, 402, 572, 504, 493,1339,7471,  # 4230
-3903,1275,4360,2574,2550,7472,3640,3029,3079,2249, 565,1334,2713, 863,  41,7473,  # 4246
-7474,4361,7475,1657,2333,  19, 463,2750,4107, 606,7476,2981,3256,1087,2084,1323,  # 4262
-2652,2982,7477,1631,1623,1750,4108,2682,7478,2864, 791,2714,2653,2334, 232,2416,  # 4278
-7479,2983,1498,7480,2654,2620, 755,1366,3641,3257,3126,2025,1609, 119,1917,3427,  # 4294
- 862,1026,4109,7481,3904,3760,4362,3905,4363,2260,1951,2470,7482,1125, 817,4110,  # 4310
-4111,3906,1513,1766,2040,1487,4112,3030,3258,2824,3761,3127,7483,7484,1507,7485,  # 4326
-2683, 733,  40,1632,1106,2865, 345,4113, 841,2524, 230,4364,2984,1846,3259,3428,  # 4342
-7486,1263, 986,3429,7487, 735, 879, 254,1137, 857, 622,1300,1180,1388,1562,3907,  # 4358
-3908,2939, 967,2751,2655,1349, 592,2133,1692,3324,2985,1994,4114,1679,3909,1901,  # 4374
-2185,7488, 739,3642,2715,1296,1290,7489,4115,2198,2199,1921,1563,2595,2551,1870,  # 4390
-2752,2986,7490, 435,7491, 343,1108, 596,  17,1751,4365,2235,3430,3643,7492,4366,  # 4406
- 294,3527,2940,1693, 477, 979, 281,2041,3528, 643,2042,3644,2621,2782,2261,1031,  # 4422
-2335,2134,2298,3529,4367, 367,1249,2552,7493,3530,7494,4368,1283,3325,2004, 240,  # 4438
-1762,3326,4369,4370, 836,1069,3128, 474,7495,2148,2525, 268,3531,7496,3188,1521,  # 4454
-1284,7497,1658,1546,4116,7498,3532,3533,7499,4117,3327,2684,1685,4118, 961,1673,  # 4470
-2622, 190,2005,2200,3762,4371,4372,7500, 570,2497,3645,1490,7501,4373,2623,3260,  # 4486
-1956,4374, 584,1514, 396,1045,1944,7502,4375,1967,2444,7503,7504,4376,3910, 619,  # 4502
-7505,3129,3261, 215,2006,2783,2553,3189,4377,3190,4378, 763,4119,3763,4379,7506,  # 4518
-7507,1957,1767,2941,3328,3646,1174, 452,1477,4380,3329,3130,7508,2825,1253,2382,  # 4534
-2186,1091,2285,4120, 492,7509, 638,1169,1824,2135,1752,3911, 648, 926,1021,1324,  # 4550
-4381, 520,4382, 997, 847,1007, 892,4383,3764,2262,1871,3647,7510,2400,1784,4384,  # 4566
-1952,2942,3080,3191,1728,4121,2043,3648,4385,2007,1701,3131,1551,  30,2263,4122,  # 4582
-7511,2026,4386,3534,7512, 501,7513,4123, 594,3431,2165,1821,3535,3432,3536,3192,  # 4598
- 829,2826,4124,7514,1680,3132,1225,4125,7515,3262,4387,4126,3133,2336,7516,4388,  # 4614
-4127,7517,3912,3913,7518,1847,2383,2596,3330,7519,4389, 374,3914, 652,4128,4129,  # 4630
- 375,1140, 798,7520,7521,7522,2361,4390,2264, 546,1659, 138,3031,2445,4391,7523,  # 4646
-2250, 612,1848, 910, 796,3765,1740,1371, 825,3766,3767,7524,2906,2554,7525, 692,  # 4662
- 444,3032,2624, 801,4392,4130,7526,1491, 244,1053,3033,4131,4132, 340,7527,3915,  # 4678
-1041,2987, 293,1168,  87,1357,7528,1539, 959,7529,2236, 721, 694,4133,3768, 219,  # 4694
-1478, 644,1417,3331,2656,1413,1401,1335,1389,3916,7530,7531,2988,2362,3134,1825,  # 4710
- 730,1515, 184,2827,  66,4393,7532,1660,2943, 246,3332, 378,1457, 226,3433, 975,  # 4726
-3917,2944,1264,3537, 674, 696,7533, 163,7534,1141,2417,2166, 713,3538,3333,4394,  # 4742
-3918,7535,7536,1186,  15,7537,1079,1070,7538,1522,3193,3539, 276,1050,2716, 758,  # 4758
-1126, 653,2945,3263,7539,2337, 889,3540,3919,3081,2989, 903,1250,4395,3920,3434,  # 4774
-3541,1342,1681,1718, 766,3264, 286,  89,2946,3649,7540,1713,7541,2597,3334,2990,  # 4790
-7542,2947,2215,3194,2866,7543,4396,2498,2526, 181, 387,1075,3921, 731,2187,3335,  # 4806
-7544,3265, 310, 313,3435,2299, 770,4134,  54,3034, 189,4397,3082,3769,3922,7545,  # 4822
-1230,1617,1849, 355,3542,4135,4398,3336, 111,4136,3650,1350,3135,3436,3035,4137,  # 4838
-2149,3266,3543,7546,2784,3923,3924,2991, 722,2008,7547,1071, 247,1207,2338,2471,  # 4854
-1378,4399,2009, 864,1437,1214,4400, 373,3770,1142,2216, 667,4401, 442,2753,2555,  # 4870
-3771,3925,1968,4138,3267,1839, 837, 170,1107, 934,1336,1882,7548,7549,2118,4139,  # 4886
-2828, 743,1569,7550,4402,4140, 582,2384,1418,3437,7551,1802,7552, 357,1395,1729,  # 4902
-3651,3268,2418,1564,2237,7553,3083,3772,1633,4403,1114,2085,4141,1532,7554, 482,  # 4918
-2446,4404,7555,7556,1492, 833,1466,7557,2717,3544,1641,2829,7558,1526,1272,3652,  # 4934
-4142,1686,1794, 416,2556,1902,1953,1803,7559,3773,2785,3774,1159,2316,7560,2867,  # 4950
-4405,1610,1584,3036,2419,2754, 443,3269,1163,3136,7561,7562,3926,7563,4143,2499,  # 4966
-3037,4406,3927,3137,2103,1647,3545,2010,1872,4144,7564,4145, 431,3438,7565, 250,  # 4982
-  97,  81,4146,7566,1648,1850,1558, 160, 848,7567, 866, 740,1694,7568,2201,2830,  # 4998
-3195,4147,4407,3653,1687, 950,2472, 426, 469,3196,3654,3655,3928,7569,7570,1188,  # 5014
- 424,1995, 861,3546,4148,3775,2202,2685, 168,1235,3547,4149,7571,2086,1674,4408,  # 5030
-3337,3270, 220,2557,1009,7572,3776, 670,2992, 332,1208, 717,7573,7574,3548,2447,  # 5046
-3929,3338,7575, 513,7576,1209,2868,3339,3138,4409,1080,7577,7578,7579,7580,2527,  # 5062
-3656,3549, 815,1587,3930,3931,7581,3550,3439,3777,1254,4410,1328,3038,1390,3932,  # 5078
-1741,3933,3778,3934,7582, 236,3779,2448,3271,7583,7584,3657,3780,1273,3781,4411,  # 5094
-7585, 308,7586,4412, 245,4413,1851,2473,1307,2575, 430, 715,2136,2449,7587, 270,  # 5110
- 199,2869,3935,7588,3551,2718,1753, 761,1754, 725,1661,1840,4414,3440,3658,7589,  # 5126
-7590, 587,  14,3272, 227,2598, 326, 480,2265, 943,2755,3552, 291, 650,1883,7591,  # 5142
-1702,1226, 102,1547,  62,3441, 904,4415,3442,1164,4150,7592,7593,1224,1548,2756,  # 5158
- 391, 498,1493,7594,1386,1419,7595,2055,1177,4416, 813, 880,1081,2363, 566,1145,  # 5174
-4417,2286,1001,1035,2558,2599,2238, 394,1286,7596,7597,2068,7598,  86,1494,1730,  # 5190
-3936, 491,1588, 745, 897,2948, 843,3340,3937,2757,2870,3273,1768, 998,2217,2069,  # 5206
- 397,1826,1195,1969,3659,2993,3341, 284,7599,3782,2500,2137,2119,1903,7600,3938,  # 5222
-2150,3939,4151,1036,3443,1904, 114,2559,4152, 209,1527,7601,7602,2949,2831,2625,  # 5238
-2385,2719,3139, 812,2560,7603,3274,7604,1559, 737,1884,3660,1210, 885,  28,2686,  # 5254
-3553,3783,7605,4153,1004,1779,4418,7606, 346,1981,2218,2687,4419,3784,1742, 797,  # 5270
-1642,3940,1933,1072,1384,2151, 896,3941,3275,3661,3197,2871,3554,7607,2561,1958,  # 5286
-4420,2450,1785,7608,7609,7610,3942,4154,1005,1308,3662,4155,2720,4421,4422,1528,  # 5302
-2600, 161,1178,4156,1982, 987,4423,1101,4157, 631,3943,1157,3198,2420,1343,1241,  # 5318
-1016,2239,2562, 372, 877,2339,2501,1160, 555,1934, 911,3944,7611, 466,1170, 169,  # 5334
-1051,2907,2688,3663,2474,2994,1182,2011,2563,1251,2626,7612, 992,2340,3444,1540,  # 5350
-2721,1201,2070,2401,1996,2475,7613,4424, 528,1922,2188,1503,1873,1570,2364,3342,  # 5366
-3276,7614, 557,1073,7615,1827,3445,2087,2266,3140,3039,3084, 767,3085,2786,4425,  # 5382
-1006,4158,4426,2341,1267,2176,3664,3199, 778,3945,3200,2722,1597,2657,7616,4427,  # 5398
-7617,3446,7618,7619,7620,3277,2689,1433,3278, 131,  95,1504,3946, 723,4159,3141,  # 5414
-1841,3555,2758,2189,3947,2027,2104,3665,7621,2995,3948,1218,7622,3343,3201,3949,  # 5430
-4160,2576, 248,1634,3785, 912,7623,2832,3666,3040,3786, 654,  53,7624,2996,7625,  # 5446
-1688,4428, 777,3447,1032,3950,1425,7626, 191, 820,2120,2833, 971,4429, 931,3202,  # 5462
- 135, 664, 783,3787,1997, 772,2908,1935,3951,3788,4430,2909,3203, 282,2723, 640,  # 5478
-1372,3448,1127, 922, 325,3344,7627,7628, 711,2044,7629,7630,3952,2219,2787,1936,  # 5494
-3953,3345,2220,2251,3789,2300,7631,4431,3790,1258,3279,3954,3204,2138,2950,3955,  # 5510
-3956,7632,2221, 258,3205,4432, 101,1227,7633,3280,1755,7634,1391,3281,7635,2910,  # 5526
-2056, 893,7636,7637,7638,1402,4161,2342,7639,7640,3206,3556,7641,7642, 878,1325,  # 5542
-1780,2788,4433, 259,1385,2577, 744,1183,2267,4434,7643,3957,2502,7644, 684,1024,  # 5558
-4162,7645, 472,3557,3449,1165,3282,3958,3959, 322,2152, 881, 455,1695,1152,1340,  # 5574
- 660, 554,2153,4435,1058,4436,4163, 830,1065,3346,3960,4437,1923,7646,1703,1918,  # 5590
-7647, 932,2268, 122,7648,4438, 947, 677,7649,3791,2627, 297,1905,1924,2269,4439,  # 5606
-2317,3283,7650,7651,4164,7652,4165,  84,4166, 112, 989,7653, 547,1059,3961, 701,  # 5622
-3558,1019,7654,4167,7655,3450, 942, 639, 457,2301,2451, 993,2951, 407, 851, 494,  # 5638
-4440,3347, 927,7656,1237,7657,2421,3348, 573,4168, 680, 921,2911,1279,1874, 285,  # 5654
- 790,1448,1983, 719,2167,7658,7659,4441,3962,3963,1649,7660,1541, 563,7661,1077,  # 5670
-7662,3349,3041,3451, 511,2997,3964,3965,3667,3966,1268,2564,3350,3207,4442,4443,  # 5686
-7663, 535,1048,1276,1189,2912,2028,3142,1438,1373,2834,2952,1134,2012,7664,4169,  # 5702
-1238,2578,3086,1259,7665, 700,7666,2953,3143,3668,4170,7667,4171,1146,1875,1906,  # 5718
-4444,2601,3967, 781,2422, 132,1589, 203, 147, 273,2789,2402, 898,1786,2154,3968,  # 5734
-3969,7668,3792,2790,7669,7670,4445,4446,7671,3208,7672,1635,3793, 965,7673,1804,  # 5750
-2690,1516,3559,1121,1082,1329,3284,3970,1449,3794,  65,1128,2835,2913,2759,1590,  # 5766
-3795,7674,7675,  12,2658,  45, 976,2579,3144,4447, 517,2528,1013,1037,3209,7676,  # 5782
-3796,2836,7677,3797,7678,3452,7679,2602, 614,1998,2318,3798,3087,2724,2628,7680,  # 5798
-2580,4172, 599,1269,7681,1810,3669,7682,2691,3088, 759,1060, 489,1805,3351,3285,  # 5814
-1358,7683,7684,2386,1387,1215,2629,2252, 490,7685,7686,4173,1759,2387,2343,7687,  # 5830
-4448,3799,1907,3971,2630,1806,3210,4449,3453,3286,2760,2344, 874,7688,7689,3454,  # 5846
-3670,1858,  91,2914,3671,3042,3800,4450,7690,3145,3972,2659,7691,3455,1202,1403,  # 5862
-3801,2954,2529,1517,2503,4451,3456,2504,7692,4452,7693,2692,1885,1495,1731,3973,  # 5878
-2365,4453,7694,2029,7695,7696,3974,2693,1216, 237,2581,4174,2319,3975,3802,4454,  # 5894
-4455,2694,3560,3457, 445,4456,7697,7698,7699,7700,2761,  61,3976,3672,1822,3977,  # 5910
-7701, 687,2045, 935, 925, 405,2660, 703,1096,1859,2725,4457,3978,1876,1367,2695,  # 5926
-3352, 918,2105,1781,2476, 334,3287,1611,1093,4458, 564,3146,3458,3673,3353, 945,  # 5942
-2631,2057,4459,7702,1925, 872,4175,7703,3459,2696,3089, 349,4176,3674,3979,4460,  # 5958
-3803,4177,3675,2155,3980,4461,4462,4178,4463,2403,2046, 782,3981, 400, 251,4179,  # 5974
-1624,7704,7705, 277,3676, 299,1265, 476,1191,3804,2121,4180,4181,1109, 205,7706,  # 5990
-2582,1000,2156,3561,1860,7707,7708,7709,4464,7710,4465,2565, 107,2477,2157,3982,  # 6006
-3460,3147,7711,1533, 541,1301, 158, 753,4182,2872,3562,7712,1696, 370,1088,4183,  # 6022
-4466,3563, 579, 327, 440, 162,2240, 269,1937,1374,3461, 968,3043,  56,1396,3090,  # 6038
-2106,3288,3354,7713,1926,2158,4467,2998,7714,3564,7715,7716,3677,4468,2478,7717,  # 6054
-2791,7718,1650,4469,7719,2603,7720,7721,3983,2661,3355,1149,3356,3984,3805,3985,  # 6070
-7722,1076,  49,7723, 951,3211,3289,3290, 450,2837, 920,7724,1811,2792,2366,4184,  # 6086
-1908,1138,2367,3806,3462,7725,3212,4470,1909,1147,1518,2423,4471,3807,7726,4472,  # 6102
-2388,2604, 260,1795,3213,7727,7728,3808,3291, 708,7729,3565,1704,7730,3566,1351,  # 6118
-1618,3357,2999,1886, 944,4185,3358,4186,3044,3359,4187,7731,3678, 422, 413,1714,  # 6134
-3292, 500,2058,2345,4188,2479,7732,1344,1910, 954,7733,1668,7734,7735,3986,2404,  # 6150
-4189,3567,3809,4190,7736,2302,1318,2505,3091, 133,3092,2873,4473, 629,  31,2838,  # 6166
-2697,3810,4474, 850, 949,4475,3987,2955,1732,2088,4191,1496,1852,7737,3988, 620,  # 6182
-3214, 981,1242,3679,3360,1619,3680,1643,3293,2139,2452,1970,1719,3463,2168,7738,  # 6198
-3215,7739,7740,3361,1828,7741,1277,4476,1565,2047,7742,1636,3568,3093,7743, 869,  # 6214
-2839, 655,3811,3812,3094,3989,3000,3813,1310,3569,4477,7744,7745,7746,1733, 558,  # 6230
-4478,3681, 335,1549,3045,1756,4192,3682,1945,3464,1829,1291,1192, 470,2726,2107,  # 6246
-2793, 913,1054,3990,7747,1027,7748,3046,3991,4479, 982,2662,3362,3148,3465,3216,  # 6262
-3217,1946,2794,7749, 571,4480,7750,1830,7751,3570,2583,1523,2424,7752,2089, 984,  # 6278
-4481,3683,1959,7753,3684, 852, 923,2795,3466,3685, 969,1519, 999,2048,2320,1705,  # 6294
-7754,3095, 615,1662, 151, 597,3992,2405,2321,1049, 275,4482,3686,4193, 568,3687,  # 6310
-3571,2480,4194,3688,7755,2425,2270, 409,3218,7756,1566,2874,3467,1002, 769,2840,  # 6326
- 194,2090,3149,3689,2222,3294,4195, 628,1505,7757,7758,1763,2177,3001,3993, 521,  # 6342
-1161,2584,1787,2203,2406,4483,3994,1625,4196,4197, 412,  42,3096, 464,7759,2632,  # 6358
-4484,3363,1760,1571,2875,3468,2530,1219,2204,3814,2633,2140,2368,4485,4486,3295,  # 6374
-1651,3364,3572,7760,7761,3573,2481,3469,7762,3690,7763,7764,2271,2091, 460,7765,  # 6390
-4487,7766,3002, 962, 588,3574, 289,3219,2634,1116,  52,7767,3047,1796,7768,7769,  # 6406
-7770,1467,7771,1598,1143,3691,4198,1984,1734,1067,4488,1280,3365, 465,4489,1572,  # 6422
- 510,7772,1927,2241,1812,1644,3575,7773,4490,3692,7774,7775,2663,1573,1534,7776,  # 6438
-7777,4199, 536,1807,1761,3470,3815,3150,2635,7778,7779,7780,4491,3471,2915,1911,  # 6454
-2796,7781,3296,1122, 377,3220,7782, 360,7783,7784,4200,1529, 551,7785,2059,3693,  # 6470
-1769,2426,7786,2916,4201,3297,3097,2322,2108,2030,4492,1404, 136,1468,1479, 672,  # 6486
-1171,3221,2303, 271,3151,7787,2762,7788,2049, 678,2727, 865,1947,4493,7789,2013,  # 6502
-3995,2956,7790,2728,2223,1397,3048,3694,4494,4495,1735,2917,3366,3576,7791,3816,  # 6518
- 509,2841,2453,2876,3817,7792,7793,3152,3153,4496,4202,2531,4497,2304,1166,1010,  # 6534
- 552, 681,1887,7794,7795,2957,2958,3996,1287,1596,1861,3154, 358, 453, 736, 175,  # 6550
- 478,1117, 905,1167,1097,7796,1853,1530,7797,1706,7798,2178,3472,2287,3695,3473,  # 6566
-3577,4203,2092,4204,7799,3367,1193,2482,4205,1458,2190,2205,1862,1888,1421,3298,  # 6582
-2918,3049,2179,3474, 595,2122,7800,3997,7801,7802,4206,1707,2636, 223,3696,1359,  # 6598
- 751,3098, 183,3475,7803,2797,3003, 419,2369, 633, 704,3818,2389, 241,7804,7805,  # 6614
-7806, 838,3004,3697,2272,2763,2454,3819,1938,2050,3998,1309,3099,2242,1181,7807,  # 6630
-1136,2206,3820,2370,1446,4207,2305,4498,7808,7809,4208,1055,2605, 484,3698,7810,  # 6646
-3999, 625,4209,2273,3368,1499,4210,4000,7811,4001,4211,3222,2274,2275,3476,7812,  # 6662
-7813,2764, 808,2606,3699,3369,4002,4212,3100,2532, 526,3370,3821,4213, 955,7814,  # 6678
-1620,4214,2637,2427,7815,1429,3700,1669,1831, 994, 928,7816,3578,1260,7817,7818,  # 6694
-7819,1948,2288, 741,2919,1626,4215,2729,2455, 867,1184, 362,3371,1392,7820,7821,  # 6710
-4003,4216,1770,1736,3223,2920,4499,4500,1928,2698,1459,1158,7822,3050,3372,2877,  # 6726
-1292,1929,2506,2842,3701,1985,1187,2071,2014,2607,4217,7823,2566,2507,2169,3702,  # 6742
-2483,3299,7824,3703,4501,7825,7826, 666,1003,3005,1022,3579,4218,7827,4502,1813,  # 6758
-2253, 574,3822,1603, 295,1535, 705,3823,4219, 283, 858, 417,7828,7829,3224,4503,  # 6774
-4504,3051,1220,1889,1046,2276,2456,4004,1393,1599, 689,2567, 388,4220,7830,2484,  # 6790
- 802,7831,2798,3824,2060,1405,2254,7832,4505,3825,2109,1052,1345,3225,1585,7833,  # 6806
- 809,7834,7835,7836, 575,2730,3477, 956,1552,1469,1144,2323,7837,2324,1560,2457,  # 6822
-3580,3226,4005, 616,2207,3155,2180,2289,7838,1832,7839,3478,4506,7840,1319,3704,  # 6838
-3705,1211,3581,1023,3227,1293,2799,7841,7842,7843,3826, 607,2306,3827, 762,2878,  # 6854
-1439,4221,1360,7844,1485,3052,7845,4507,1038,4222,1450,2061,2638,4223,1379,4508,  # 6870
-2585,7846,7847,4224,1352,1414,2325,2921,1172,7848,7849,3828,3829,7850,1797,1451,  # 6886
-7851,7852,7853,7854,2922,4006,4007,2485,2346, 411,4008,4009,3582,3300,3101,4509,  # 6902
-1561,2664,1452,4010,1375,7855,7856,  47,2959, 316,7857,1406,1591,2923,3156,7858,  # 6918
-1025,2141,3102,3157, 354,2731, 884,2224,4225,2407, 508,3706, 726,3583, 996,2428,  # 6934
-3584, 729,7859, 392,2191,1453,4011,4510,3707,7860,7861,2458,3585,2608,1675,2800,  # 6950
- 919,2347,2960,2348,1270,4511,4012,  73,7862,7863, 647,7864,3228,2843,2255,1550,  # 6966
-1346,3006,7865,1332, 883,3479,7866,7867,7868,7869,3301,2765,7870,1212, 831,1347,  # 6982
-4226,4512,2326,3830,1863,3053, 720,3831,4513,4514,3832,7871,4227,7872,7873,4515,  # 6998
-7874,7875,1798,4516,3708,2609,4517,3586,1645,2371,7876,7877,2924, 669,2208,2665,  # 7014
-2429,7878,2879,7879,7880,1028,3229,7881,4228,2408,7882,2256,1353,7883,7884,4518,  # 7030
-3158, 518,7885,4013,7886,4229,1960,7887,2142,4230,7888,7889,3007,2349,2350,3833,  # 7046
- 516,1833,1454,4014,2699,4231,4519,2225,2610,1971,1129,3587,7890,2766,7891,2961,  # 7062
-1422, 577,1470,3008,1524,3373,7892,7893, 432,4232,3054,3480,7894,2586,1455,2508,  # 7078
-2226,1972,1175,7895,1020,2732,4015,3481,4520,7896,2733,7897,1743,1361,3055,3482,  # 7094
-2639,4016,4233,4521,2290, 895, 924,4234,2170, 331,2243,3056, 166,1627,3057,1098,  # 7110
-7898,1232,2880,2227,3374,4522, 657, 403,1196,2372, 542,3709,3375,1600,4235,3483,  # 7126
-7899,4523,2767,3230, 576, 530,1362,7900,4524,2533,2666,3710,4017,7901, 842,3834,  # 7142
-7902,2801,2031,1014,4018, 213,2700,3376, 665, 621,4236,7903,3711,2925,2430,7904,  # 7158
-2431,3302,3588,3377,7905,4237,2534,4238,4525,3589,1682,4239,3484,1380,7906, 724,  # 7174
-2277, 600,1670,7907,1337,1233,4526,3103,2244,7908,1621,4527,7909, 651,4240,7910,  # 7190
-1612,4241,2611,7911,2844,7912,2734,2307,3058,7913, 716,2459,3059, 174,1255,2701,  # 7206
-4019,3590, 548,1320,1398, 728,4020,1574,7914,1890,1197,3060,4021,7915,3061,3062,  # 7222
-3712,3591,3713, 747,7916, 635,4242,4528,7917,7918,7919,4243,7920,7921,4529,7922,  # 7238
-3378,4530,2432, 451,7923,3714,2535,2072,4244,2735,4245,4022,7924,1764,4531,7925,  # 7254
-4246, 350,7926,2278,2390,2486,7927,4247,4023,2245,1434,4024, 488,4532, 458,4248,  # 7270
-4025,3715, 771,1330,2391,3835,2568,3159,2159,2409,1553,2667,3160,4249,7928,2487,  # 7286
-2881,2612,1720,2702,4250,3379,4533,7929,2536,4251,7930,3231,4252,2768,7931,2015,  # 7302
-2736,7932,1155,1017,3716,3836,7933,3303,2308, 201,1864,4253,1430,7934,4026,7935,  # 7318
-7936,7937,7938,7939,4254,1604,7940, 414,1865, 371,2587,4534,4535,3485,2016,3104,  # 7334
-4536,1708, 960,4255, 887, 389,2171,1536,1663,1721,7941,2228,4027,2351,2926,1580,  # 7350
-7942,7943,7944,1744,7945,2537,4537,4538,7946,4539,7947,2073,7948,7949,3592,3380,  # 7366
-2882,4256,7950,4257,2640,3381,2802, 673,2703,2460, 709,3486,4028,3593,4258,7951,  # 7382
-1148, 502, 634,7952,7953,1204,4540,3594,1575,4541,2613,3717,7954,3718,3105, 948,  # 7398
-3232, 121,1745,3837,1110,7955,4259,3063,2509,3009,4029,3719,1151,1771,3838,1488,  # 7414
-4030,1986,7956,2433,3487,7957,7958,2093,7959,4260,3839,1213,1407,2803, 531,2737,  # 7430
-2538,3233,1011,1537,7960,2769,4261,3106,1061,7961,3720,3721,1866,2883,7962,2017,  # 7446
- 120,4262,4263,2062,3595,3234,2309,3840,2668,3382,1954,4542,7963,7964,3488,1047,  # 7462
-2704,1266,7965,1368,4543,2845, 649,3383,3841,2539,2738,1102,2846,2669,7966,7967,  # 7478
-1999,7968,1111,3596,2962,7969,2488,3842,3597,2804,1854,3384,3722,7970,7971,3385,  # 7494
-2410,2884,3304,3235,3598,7972,2569,7973,3599,2805,4031,1460, 856,7974,3600,7975,  # 7510
-2885,2963,7976,2886,3843,7977,4264, 632,2510, 875,3844,1697,3845,2291,7978,7979,  # 7526
-4544,3010,1239, 580,4545,4265,7980, 914, 936,2074,1190,4032,1039,2123,7981,7982,  # 7542
-7983,3386,1473,7984,1354,4266,3846,7985,2172,3064,4033, 915,3305,4267,4268,3306,  # 7558
-1605,1834,7986,2739, 398,3601,4269,3847,4034, 328,1912,2847,4035,3848,1331,4270,  # 7574
-3011, 937,4271,7987,3602,4036,4037,3387,2160,4546,3388, 524, 742, 538,3065,1012,  # 7590
-7988,7989,3849,2461,7990, 658,1103, 225,3850,7991,7992,4547,7993,4548,7994,3236,  # 7606
-1243,7995,4038, 963,2246,4549,7996,2705,3603,3161,7997,7998,2588,2327,7999,4550,  # 7622
-8000,8001,8002,3489,3307, 957,3389,2540,2032,1930,2927,2462, 870,2018,3604,1746,  # 7638
-2770,2771,2434,2463,8003,3851,8004,3723,3107,3724,3490,3390,3725,8005,1179,3066,  # 7654
-8006,3162,2373,4272,3726,2541,3163,3108,2740,4039,8007,3391,1556,2542,2292, 977,  # 7670
-2887,2033,4040,1205,3392,8008,1765,3393,3164,2124,1271,1689, 714,4551,3491,8009,  # 7686
-2328,3852, 533,4273,3605,2181, 617,8010,2464,3308,3492,2310,8011,8012,3165,8013,  # 7702
-8014,3853,1987, 618, 427,2641,3493,3394,8015,8016,1244,1690,8017,2806,4274,4552,  # 7718
-8018,3494,8019,8020,2279,1576, 473,3606,4275,3395, 972,8021,3607,8022,3067,8023,  # 7734
-8024,4553,4554,8025,3727,4041,4042,8026, 153,4555, 356,8027,1891,2888,4276,2143,  # 7750
- 408, 803,2352,8028,3854,8029,4277,1646,2570,2511,4556,4557,3855,8030,3856,4278,  # 7766
-8031,2411,3396, 752,8032,8033,1961,2964,8034, 746,3012,2465,8035,4279,3728, 698,  # 7782
-4558,1892,4280,3608,2543,4559,3609,3857,8036,3166,3397,8037,1823,1302,4043,2706,  # 7798
-3858,1973,4281,8038,4282,3167, 823,1303,1288,1236,2848,3495,4044,3398, 774,3859,  # 7814
-8039,1581,4560,1304,2849,3860,4561,8040,2435,2161,1083,3237,4283,4045,4284, 344,  # 7830
-1173, 288,2311, 454,1683,8041,8042,1461,4562,4046,2589,8043,8044,4563, 985, 894,  # 7846
-8045,3399,3168,8046,1913,2928,3729,1988,8047,2110,1974,8048,4047,8049,2571,1194,  # 7862
- 425,8050,4564,3169,1245,3730,4285,8051,8052,2850,8053, 636,4565,1855,3861, 760,  # 7878
-1799,8054,4286,2209,1508,4566,4048,1893,1684,2293,8055,8056,8057,4287,4288,2210,  # 7894
- 479,8058,8059, 832,8060,4049,2489,8061,2965,2490,3731, 990,3109, 627,1814,2642,  # 7910
-4289,1582,4290,2125,2111,3496,4567,8062, 799,4291,3170,8063,4568,2112,1737,3013,  # 7926
-1018, 543, 754,4292,3309,1676,4569,4570,4050,8064,1489,8065,3497,8066,2614,2889,  # 7942
-4051,8067,8068,2966,8069,8070,8071,8072,3171,4571,4572,2182,1722,8073,3238,3239,  # 7958
-1842,3610,1715, 481, 365,1975,1856,8074,8075,1962,2491,4573,8076,2126,3611,3240,  # 7974
- 433,1894,2063,2075,8077, 602,2741,8078,8079,8080,8081,8082,3014,1628,3400,8083,  # 7990
-3172,4574,4052,2890,4575,2512,8084,2544,2772,8085,8086,8087,3310,4576,2891,8088,  # 8006
-4577,8089,2851,4578,4579,1221,2967,4053,2513,8090,8091,8092,1867,1989,8093,8094,  # 8022
-8095,1895,8096,8097,4580,1896,4054, 318,8098,2094,4055,4293,8099,8100, 485,8101,  # 8038
- 938,3862, 553,2670, 116,8102,3863,3612,8103,3498,2671,2773,3401,3311,2807,8104,  # 8054
-3613,2929,4056,1747,2930,2968,8105,8106, 207,8107,8108,2672,4581,2514,8109,3015,  # 8070
- 890,3614,3864,8110,1877,3732,3402,8111,2183,2353,3403,1652,8112,8113,8114, 941,  # 8086
-2294, 208,3499,4057,2019, 330,4294,3865,2892,2492,3733,4295,8115,8116,8117,8118,  # 8102
-)
-
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/euctwprober.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/euctwprober.py
deleted file mode 100644
index 35669cc..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/euctwprober.py
+++ /dev/null
@@ -1,46 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is mozilla.org code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .mbcharsetprober import MultiByteCharSetProber
-from .codingstatemachine import CodingStateMachine
-from .chardistribution import EUCTWDistributionAnalysis
-from .mbcssm import EUCTW_SM_MODEL
-
-class EUCTWProber(MultiByteCharSetProber):
-    def __init__(self):
-        super(EUCTWProber, self).__init__()
-        self.coding_sm = CodingStateMachine(EUCTW_SM_MODEL)
-        self.distribution_analyzer = EUCTWDistributionAnalysis()
-        self.reset()
-
-    @property
-    def charset_name(self):
-        return "EUC-TW"
-
-    @property
-    def language(self):
-        return "Taiwan"
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/gb2312freq.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/gb2312freq.py
deleted file mode 100644
index 697837b..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/gb2312freq.py
+++ /dev/null
@@ -1,283 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-# GB2312 most frequently used character table
-#
-# Char to FreqOrder table , from hz6763
-
-# 512  --> 0.79  -- 0.79
-# 1024 --> 0.92  -- 0.13
-# 2048 --> 0.98  -- 0.06
-# 6768 --> 1.00  -- 0.02
-#
-# Ideal Distribution Ratio = 0.79135/(1-0.79135) = 3.79
-# Random Distribution Ration = 512 / (3755 - 512) = 0.157
-#
-# Typical Distribution Ratio about 25% of Ideal one, still much higher that RDR
-
-GB2312_TYPICAL_DISTRIBUTION_RATIO = 0.9
-
-GB2312_TABLE_SIZE = 3760
-
-GB2312_CHAR_TO_FREQ_ORDER = (
-1671, 749,1443,2364,3924,3807,2330,3921,1704,3463,2691,1511,1515, 572,3191,2205,
-2361, 224,2558, 479,1711, 963,3162, 440,4060,1905,2966,2947,3580,2647,3961,3842,
-2204, 869,4207, 970,2678,5626,2944,2956,1479,4048, 514,3595, 588,1346,2820,3409,
- 249,4088,1746,1873,2047,1774, 581,1813, 358,1174,3590,1014,1561,4844,2245, 670,
-1636,3112, 889,1286, 953, 556,2327,3060,1290,3141, 613, 185,3477,1367, 850,3820,
-1715,2428,2642,2303,2732,3041,2562,2648,3566,3946,1349, 388,3098,2091,1360,3585,
- 152,1687,1539, 738,1559,  59,1232,2925,2267,1388,1249,1741,1679,2960, 151,1566,
-1125,1352,4271, 924,4296, 385,3166,4459, 310,1245,2850,  70,3285,2729,3534,3575,
-2398,3298,3466,1960,2265, 217,3647, 864,1909,2084,4401,2773,1010,3269,5152, 853,
-3051,3121,1244,4251,1895, 364,1499,1540,2313,1180,3655,2268, 562, 715,2417,3061,
- 544, 336,3768,2380,1752,4075, 950, 280,2425,4382, 183,2759,3272, 333,4297,2155,
-1688,2356,1444,1039,4540, 736,1177,3349,2443,2368,2144,2225, 565, 196,1482,3406,
- 927,1335,4147, 692, 878,1311,1653,3911,3622,1378,4200,1840,2969,3149,2126,1816,
-2534,1546,2393,2760, 737,2494,  13, 447, 245,2747,  38,2765,2129,2589,1079, 606,
- 360, 471,3755,2890, 404, 848, 699,1785,1236, 370,2221,1023,3746,2074,2026,2023,
-2388,1581,2119, 812,1141,3091,2536,1519, 804,2053, 406,1596,1090, 784, 548,4414,
-1806,2264,2936,1100, 343,4114,5096, 622,3358, 743,3668,1510,1626,5020,3567,2513,
-3195,4115,5627,2489,2991,  24,2065,2697,1087,2719,  48,1634, 315,  68, 985,2052,
- 198,2239,1347,1107,1439, 597,2366,2172, 871,3307, 919,2487,2790,1867, 236,2570,
-1413,3794, 906,3365,3381,1701,1982,1818,1524,2924,1205, 616,2586,2072,2004, 575,
- 253,3099,  32,1365,1182, 197,1714,2454,1201, 554,3388,3224,2748, 756,2587, 250,
-2567,1507,1517,3529,1922,2761,2337,3416,1961,1677,2452,2238,3153, 615, 911,1506,
-1474,2495,1265,1906,2749,3756,3280,2161, 898,2714,1759,3450,2243,2444, 563,  26,
-3286,2266,3769,3344,2707,3677, 611,1402, 531,1028,2871,4548,1375, 261,2948, 835,
-1190,4134, 353, 840,2684,1900,3082,1435,2109,1207,1674, 329,1872,2781,4055,2686,
-2104, 608,3318,2423,2957,2768,1108,3739,3512,3271,3985,2203,1771,3520,1418,2054,
-1681,1153, 225,1627,2929, 162,2050,2511,3687,1954, 124,1859,2431,1684,3032,2894,
- 585,4805,3969,2869,2704,2088,2032,2095,3656,2635,4362,2209, 256, 518,2042,2105,
-3777,3657, 643,2298,1148,1779, 190, 989,3544, 414,  11,2135,2063,2979,1471, 403,
-3678, 126, 770,1563, 671,2499,3216,2877, 600,1179, 307,2805,4937,1268,1297,2694,
- 252,4032,1448,1494,1331,1394, 127,2256, 222,1647,1035,1481,3056,1915,1048, 873,
-3651, 210,  33,1608,2516, 200,1520, 415, 102,   0,3389,1287, 817,  91,3299,2940,
- 836,1814, 549,2197,1396,1669,2987,3582,2297,2848,4528,1070, 687,  20,1819, 121,
-1552,1364,1461,1968,2617,3540,2824,2083, 177, 948,4938,2291, 110,4549,2066, 648,
-3359,1755,2110,2114,4642,4845,1693,3937,3308,1257,1869,2123, 208,1804,3159,2992,
-2531,2549,3361,2418,1350,2347,2800,2568,1291,2036,2680,  72, 842,1990, 212,1233,
-1154,1586,  75,2027,3410,4900,1823,1337,2710,2676, 728,2810,1522,3026,4995, 157,
- 755,1050,4022, 710, 785,1936,2194,2085,1406,2777,2400, 150,1250,4049,1206, 807,
-1910, 534, 529,3309,1721,1660, 274,  39,2827, 661,2670,1578, 925,3248,3815,1094,
-4278,4901,4252,  41,1150,3747,2572,2227,4501,3658,4902,3813,3357,3617,2884,2258,
- 887, 538,4187,3199,1294,2439,3042,2329,2343,2497,1255, 107, 543,1527, 521,3478,
-3568, 194,5062,  15, 961,3870,1241,1192,2664,  66,5215,3260,2111,1295,1127,2152,
-3805,4135, 901,1164,1976, 398,1278, 530,1460, 748, 904,1054,1966,1426,  53,2909,
- 509, 523,2279,1534, 536,1019, 239,1685, 460,2353, 673,1065,2401,3600,4298,2272,
-1272,2363, 284,1753,3679,4064,1695,  81, 815,2677,2757,2731,1386, 859, 500,4221,
-2190,2566, 757,1006,2519,2068,1166,1455, 337,2654,3203,1863,1682,1914,3025,1252,
-1409,1366, 847, 714,2834,2038,3209, 964,2970,1901, 885,2553,1078,1756,3049, 301,
-1572,3326, 688,2130,1996,2429,1805,1648,2930,3421,2750,3652,3088, 262,1158,1254,
- 389,1641,1812, 526,1719, 923,2073,1073,1902, 468, 489,4625,1140, 857,2375,3070,
-3319,2863, 380, 116,1328,2693,1161,2244, 273,1212,1884,2769,3011,1775,1142, 461,
-3066,1200,2147,2212, 790, 702,2695,4222,1601,1058, 434,2338,5153,3640,  67,2360,
-4099,2502, 618,3472,1329, 416,1132, 830,2782,1807,2653,3211,3510,1662, 192,2124,
- 296,3979,1739,1611,3684,  23, 118, 324, 446,1239,1225, 293,2520,3814,3795,2535,
-3116,  17,1074, 467,2692,2201, 387,2922,  45,1326,3055,1645,3659,2817, 958, 243,
-1903,2320,1339,2825,1784,3289, 356, 576, 865,2315,2381,3377,3916,1088,3122,1713,
-1655, 935, 628,4689,1034,1327, 441, 800, 720, 894,1979,2183,1528,5289,2702,1071,
-4046,3572,2399,1571,3281,  79, 761,1103, 327, 134, 758,1899,1371,1615, 879, 442,
- 215,2605,2579, 173,2048,2485,1057,2975,3317,1097,2253,3801,4263,1403,1650,2946,
- 814,4968,3487,1548,2644,1567,1285,   2, 295,2636,  97, 946,3576, 832, 141,4257,
-3273, 760,3821,3521,3156,2607, 949,1024,1733,1516,1803,1920,2125,2283,2665,3180,
-1501,2064,3560,2171,1592, 803,3518,1416, 732,3897,4258,1363,1362,2458, 119,1427,
- 602,1525,2608,1605,1639,3175, 694,3064,  10, 465,  76,2000,4846,4208, 444,3781,
-1619,3353,2206,1273,3796, 740,2483, 320,1723,2377,3660,2619,1359,1137,1762,1724,
-2345,2842,1850,1862, 912, 821,1866, 612,2625,1735,2573,3369,1093, 844,  89, 937,
- 930,1424,3564,2413,2972,1004,3046,3019,2011, 711,3171,1452,4178, 428, 801,1943,
- 432, 445,2811, 206,4136,1472, 730, 349,  73, 397,2802,2547, 998,1637,1167, 789,
- 396,3217, 154,1218, 716,1120,1780,2819,4826,1931,3334,3762,2139,1215,2627, 552,
-3664,3628,3232,1405,2383,3111,1356,2652,3577,3320,3101,1703, 640,1045,1370,1246,
-4996, 371,1575,2436,1621,2210, 984,4033,1734,2638,  16,4529, 663,2755,3255,1451,
-3917,2257,1253,1955,2234,1263,2951, 214,1229, 617, 485, 359,1831,1969, 473,2310,
- 750,2058, 165,  80,2864,2419, 361,4344,2416,2479,1134, 796,3726,1266,2943, 860,
-2715, 938, 390,2734,1313,1384, 248, 202, 877,1064,2854, 522,3907, 279,1602, 297,
-2357, 395,3740, 137,2075, 944,4089,2584,1267,3802,  62,1533,2285, 178, 176, 780,
-2440, 201,3707, 590, 478,1560,4354,2117,1075,  30,  74,4643,4004,1635,1441,2745,
- 776,2596, 238,1077,1692,1912,2844, 605, 499,1742,3947, 241,3053, 980,1749, 936,
-2640,4511,2582, 515,1543,2162,5322,2892,2993, 890,2148,1924, 665,1827,3581,1032,
- 968,3163, 339,1044,1896, 270, 583,1791,1720,4367,1194,3488,3669,  43,2523,1657,
- 163,2167, 290,1209,1622,3378, 550, 634,2508,2510, 695,2634,2384,2512,1476,1414,
- 220,1469,2341,2138,2852,3183,2900,4939,2865,3502,1211,3680, 854,3227,1299,2976,
-3172, 186,2998,1459, 443,1067,3251,1495, 321,1932,3054, 909, 753,1410,1828, 436,
-2441,1119,1587,3164,2186,1258, 227, 231,1425,1890,3200,3942, 247, 959, 725,5254,
-2741, 577,2158,2079, 929, 120, 174, 838,2813, 591,1115, 417,2024,  40,3240,1536,
-1037, 291,4151,2354, 632,1298,2406,2500,3535,1825,1846,3451, 205,1171, 345,4238,
-  18,1163, 811, 685,2208,1217, 425,1312,1508,1175,4308,2552,1033, 587,1381,3059,
-2984,3482, 340,1316,4023,3972, 792,3176, 519, 777,4690, 918, 933,4130,2981,3741,
-  90,3360,2911,2200,5184,4550, 609,3079,2030, 272,3379,2736, 363,3881,1130,1447,
- 286, 779, 357,1169,3350,3137,1630,1220,2687,2391, 747,1277,3688,2618,2682,2601,
-1156,3196,5290,4034,3102,1689,3596,3128, 874, 219,2783, 798, 508,1843,2461, 269,
-1658,1776,1392,1913,2983,3287,2866,2159,2372, 829,4076,  46,4253,2873,1889,1894,
- 915,1834,1631,2181,2318, 298, 664,2818,3555,2735, 954,3228,3117, 527,3511,2173,
- 681,2712,3033,2247,2346,3467,1652, 155,2164,3382, 113,1994, 450, 899, 494, 994,
-1237,2958,1875,2336,1926,3727, 545,1577,1550, 633,3473, 204,1305,3072,2410,1956,
-2471, 707,2134, 841,2195,2196,2663,3843,1026,4940, 990,3252,4997, 368,1092, 437,
-3212,3258,1933,1829, 675,2977,2893, 412, 943,3723,4644,3294,3283,2230,2373,5154,
-2389,2241,2661,2323,1404,2524, 593, 787, 677,3008,1275,2059, 438,2709,2609,2240,
-2269,2246,1446,  36,1568,1373,3892,1574,2301,1456,3962, 693,2276,5216,2035,1143,
-2720,1919,1797,1811,2763,4137,2597,1830,1699,1488,1198,2090, 424,1694, 312,3634,
-3390,4179,3335,2252,1214, 561,1059,3243,2295,2561, 975,5155,2321,2751,3772, 472,
-1537,3282,3398,1047,2077,2348,2878,1323,3340,3076, 690,2906,  51, 369, 170,3541,
-1060,2187,2688,3670,2541,1083,1683, 928,3918, 459, 109,4427, 599,3744,4286, 143,
-2101,2730,2490,  82,1588,3036,2121, 281,1860, 477,4035,1238,2812,3020,2716,3312,
-1530,2188,2055,1317, 843, 636,1808,1173,3495, 649, 181,1002, 147,3641,1159,2414,
-3750,2289,2795, 813,3123,2610,1136,4368,   5,3391,4541,2174, 420, 429,1728, 754,
-1228,2115,2219, 347,2223,2733, 735,1518,3003,2355,3134,1764,3948,3329,1888,2424,
-1001,1234,1972,3321,3363,1672,1021,1450,1584, 226, 765, 655,2526,3404,3244,2302,
-3665, 731, 594,2184, 319,1576, 621, 658,2656,4299,2099,3864,1279,2071,2598,2739,
- 795,3086,3699,3908,1707,2352,2402,1382,3136,2475,1465,4847,3496,3865,1085,3004,
-2591,1084, 213,2287,1963,3565,2250, 822, 793,4574,3187,1772,1789,3050, 595,1484,
-1959,2770,1080,2650, 456, 422,2996, 940,3322,4328,4345,3092,2742, 965,2784, 739,
-4124, 952,1358,2498,2949,2565, 332,2698,2378, 660,2260,2473,4194,3856,2919, 535,
-1260,2651,1208,1428,1300,1949,1303,2942, 433,2455,2450,1251,1946, 614,1269, 641,
-1306,1810,2737,3078,2912, 564,2365,1419,1415,1497,4460,2367,2185,1379,3005,1307,
-3218,2175,1897,3063, 682,1157,4040,4005,1712,1160,1941,1399, 394, 402,2952,1573,
-1151,2986,2404, 862, 299,2033,1489,3006, 346, 171,2886,3401,1726,2932, 168,2533,
-  47,2507,1030,3735,1145,3370,1395,1318,1579,3609,4560,2857,4116,1457,2529,1965,
- 504,1036,2690,2988,2405, 745,5871, 849,2397,2056,3081, 863,2359,3857,2096,  99,
-1397,1769,2300,4428,1643,3455,1978,1757,3718,1440,  35,4879,3742,1296,4228,2280,
- 160,5063,1599,2013, 166, 520,3479,1646,3345,3012, 490,1937,1545,1264,2182,2505,
-1096,1188,1369,1436,2421,1667,2792,2460,1270,2122, 727,3167,2143, 806,1706,1012,
-1800,3037, 960,2218,1882, 805, 139,2456,1139,1521, 851,1052,3093,3089, 342,2039,
- 744,5097,1468,1502,1585,2087, 223, 939, 326,2140,2577, 892,2481,1623,4077, 982,
-3708, 135,2131,  87,2503,3114,2326,1106, 876,1616, 547,2997,2831,2093,3441,4530,
-4314,   9,3256,4229,4148, 659,1462,1986,1710,2046,2913,2231,4090,4880,5255,3392,
-3274,1368,3689,4645,1477, 705,3384,3635,1068,1529,2941,1458,3782,1509, 100,1656,
-2548, 718,2339, 408,1590,2780,3548,1838,4117,3719,1345,3530, 717,3442,2778,3220,
-2898,1892,4590,3614,3371,2043,1998,1224,3483, 891, 635, 584,2559,3355, 733,1766,
-1729,1172,3789,1891,2307, 781,2982,2271,1957,1580,5773,2633,2005,4195,3097,1535,
-3213,1189,1934,5693,3262, 586,3118,1324,1598, 517,1564,2217,1868,1893,4445,3728,
-2703,3139,1526,1787,1992,3882,2875,1549,1199,1056,2224,1904,2711,5098,4287, 338,
-1993,3129,3489,2689,1809,2815,1997, 957,1855,3898,2550,3275,3057,1105,1319, 627,
-1505,1911,1883,3526, 698,3629,3456,1833,1431, 746,  77,1261,2017,2296,1977,1885,
- 125,1334,1600, 525,1798,1109,2222,1470,1945, 559,2236,1186,3443,2476,1929,1411,
-2411,3135,1777,3372,2621,1841,1613,3229, 668,1430,1839,2643,2916, 195,1989,2671,
-2358,1387, 629,3205,2293,5256,4439, 123,1310, 888,1879,4300,3021,3605,1003,1162,
-3192,2910,2010, 140,2395,2859,  55,1082,2012,2901, 662, 419,2081,1438, 680,2774,
-4654,3912,1620,1731,1625,5035,4065,2328, 512,1344, 802,5443,2163,2311,2537, 524,
-3399,  98,1155,2103,1918,2606,3925,2816,1393,2465,1504,3773,2177,3963,1478,4346,
- 180,1113,4655,3461,2028,1698, 833,2696,1235,1322,1594,4408,3623,3013,3225,2040,
-3022, 541,2881, 607,3632,2029,1665,1219, 639,1385,1686,1099,2803,3231,1938,3188,
-2858, 427, 676,2772,1168,2025, 454,3253,2486,3556, 230,1950, 580, 791,1991,1280,
-1086,1974,2034, 630, 257,3338,2788,4903,1017,  86,4790, 966,2789,1995,1696,1131,
- 259,3095,4188,1308, 179,1463,5257, 289,4107,1248,  42,3413,1725,2288, 896,1947,
- 774,4474,4254, 604,3430,4264, 392,2514,2588, 452, 237,1408,3018, 988,4531,1970,
-3034,3310, 540,2370,1562,1288,2990, 502,4765,1147,   4,1853,2708, 207, 294,2814,
-4078,2902,2509, 684,  34,3105,3532,2551, 644, 709,2801,2344, 573,1727,3573,3557,
-2021,1081,3100,4315,2100,3681, 199,2263,1837,2385, 146,3484,1195,2776,3949, 997,
-1939,3973,1008,1091,1202,1962,1847,1149,4209,5444,1076, 493, 117,5400,2521, 972,
-1490,2934,1796,4542,2374,1512,2933,2657, 413,2888,1135,2762,2314,2156,1355,2369,
- 766,2007,2527,2170,3124,2491,2593,2632,4757,2437, 234,3125,3591,1898,1750,1376,
-1942,3468,3138, 570,2127,2145,3276,4131, 962, 132,1445,4196,  19, 941,3624,3480,
-3366,1973,1374,4461,3431,2629, 283,2415,2275, 808,2887,3620,2112,2563,1353,3610,
- 955,1089,3103,1053,  96,  88,4097, 823,3808,1583, 399, 292,4091,3313, 421,1128,
- 642,4006, 903,2539,1877,2082, 596,  29,4066,1790, 722,2157, 130, 995,1569, 769,
-1485, 464, 513,2213, 288,1923,1101,2453,4316, 133, 486,2445,  50, 625, 487,2207,
-  57, 423, 481,2962, 159,3729,1558, 491, 303, 482, 501, 240,2837, 112,3648,2392,
-1783, 362,   8,3433,3422, 610,2793,3277,1390,1284,1654,  21,3823, 734, 367, 623,
- 193, 287, 374,1009,1483, 816, 476, 313,2255,2340,1262,2150,2899,1146,2581, 782,
-2116,1659,2018,1880, 255,3586,3314,1110,2867,2137,2564, 986,2767,5185,2006, 650,
- 158, 926, 762, 881,3157,2717,2362,3587, 306,3690,3245,1542,3077,2427,1691,2478,
-2118,2985,3490,2438, 539,2305, 983, 129,1754, 355,4201,2386, 827,2923, 104,1773,
-2838,2771, 411,2905,3919, 376, 767, 122,1114, 828,2422,1817,3506, 266,3460,1007,
-1609,4998, 945,2612,4429,2274, 726,1247,1964,2914,2199,2070,4002,4108, 657,3323,
-1422, 579, 455,2764,4737,1222,2895,1670, 824,1223,1487,2525, 558, 861,3080, 598,
-2659,2515,1967, 752,2583,2376,2214,4180, 977, 704,2464,4999,2622,4109,1210,2961,
- 819,1541, 142,2284,  44, 418, 457,1126,3730,4347,4626,1644,1876,3671,1864, 302,
-1063,5694, 624, 723,1984,3745,1314,1676,2488,1610,1449,3558,3569,2166,2098, 409,
-1011,2325,3704,2306, 818,1732,1383,1824,1844,3757, 999,2705,3497,1216,1423,2683,
-2426,2954,2501,2726,2229,1475,2554,5064,1971,1794,1666,2014,1343, 783, 724, 191,
-2434,1354,2220,5065,1763,2752,2472,4152, 131, 175,2885,3434,  92,1466,4920,2616,
-3871,3872,3866, 128,1551,1632, 669,1854,3682,4691,4125,1230, 188,2973,3290,1302,
-1213, 560,3266, 917, 763,3909,3249,1760, 868,1958, 764,1782,2097, 145,2277,3774,
-4462,  64,1491,3062, 971,2132,3606,2442, 221,1226,1617, 218, 323,1185,3207,3147,
- 571, 619,1473,1005,1744,2281, 449,1887,2396,3685, 275, 375,3816,1743,3844,3731,
- 845,1983,2350,4210,1377, 773, 967,3499,3052,3743,2725,4007,1697,1022,3943,1464,
-3264,2855,2722,1952,1029,2839,2467,  84,4383,2215, 820,1391,2015,2448,3672, 377,
-1948,2168, 797,2545,3536,2578,2645,  94,2874,1678, 405,1259,3071, 771, 546,1315,
- 470,1243,3083, 895,2468, 981, 969,2037, 846,4181, 653,1276,2928,  14,2594, 557,
-3007,2474, 156, 902,1338,1740,2574, 537,2518, 973,2282,2216,2433,1928, 138,2903,
-1293,2631,1612, 646,3457, 839,2935, 111, 496,2191,2847, 589,3186, 149,3994,2060,
-4031,2641,4067,3145,1870,  37,3597,2136,1025,2051,3009,3383,3549,1121,1016,3261,
-1301, 251,2446,2599,2153, 872,3246, 637, 334,3705, 831, 884, 921,3065,3140,4092,
-2198,1944, 246,2964, 108,2045,1152,1921,2308,1031, 203,3173,4170,1907,3890, 810,
-1401,2003,1690, 506, 647,1242,2828,1761,1649,3208,2249,1589,3709,2931,5156,1708,
- 498, 666,2613, 834,3817,1231, 184,2851,1124, 883,3197,2261,3710,1765,1553,2658,
-1178,2639,2351,  93,1193, 942,2538,2141,4402, 235,1821, 870,1591,2192,1709,1871,
-3341,1618,4126,2595,2334, 603, 651,  69, 701, 268,2662,3411,2555,1380,1606, 503,
- 448, 254,2371,2646, 574,1187,2309,1770, 322,2235,1292,1801, 305, 566,1133, 229,
-2067,2057, 706, 167, 483,2002,2672,3295,1820,3561,3067, 316, 378,2746,3452,1112,
- 136,1981, 507,1651,2917,1117, 285,4591, 182,2580,3522,1304, 335,3303,1835,2504,
-1795,1792,2248, 674,1018,2106,2449,1857,2292,2845, 976,3047,1781,2600,2727,1389,
-1281,  52,3152, 153, 265,3950, 672,3485,3951,4463, 430,1183, 365, 278,2169,  27,
-1407,1336,2304, 209,1340,1730,2202,1852,2403,2883, 979,1737,1062, 631,2829,2542,
-3876,2592, 825,2086,2226,3048,3625, 352,1417,3724, 542, 991, 431,1351,3938,1861,
-2294, 826,1361,2927,3142,3503,1738, 463,2462,2723, 582,1916,1595,2808, 400,3845,
-3891,2868,3621,2254,  58,2492,1123, 910,2160,2614,1372,1603,1196,1072,3385,1700,
-3267,1980, 696, 480,2430, 920, 799,1570,2920,1951,2041,4047,2540,1321,4223,2469,
-3562,2228,1271,2602, 401,2833,3351,2575,5157, 907,2312,1256, 410, 263,3507,1582,
- 996, 678,1849,2316,1480, 908,3545,2237, 703,2322, 667,1826,2849,1531,2604,2999,
-2407,3146,2151,2630,1786,3711, 469,3542, 497,3899,2409, 858, 837,4446,3393,1274,
- 786, 620,1845,2001,3311, 484, 308,3367,1204,1815,3691,2332,1532,2557,1842,2020,
-2724,1927,2333,4440, 567,  22,1673,2728,4475,1987,1858,1144,1597, 101,1832,3601,
-  12, 974,3783,4391, 951,1412,   1,3720, 453,4608,4041, 528,1041,1027,3230,2628,
-1129, 875,1051,3291,1203,2262,1069,2860,2799,2149,2615,3278, 144,1758,3040,  31,
- 475,1680, 366,2685,3184, 311,1642,4008,2466,5036,1593,1493,2809, 216,1420,1668,
- 233, 304,2128,3284, 232,1429,1768,1040,2008,3407,2740,2967,2543, 242,2133, 778,
-1565,2022,2620, 505,2189,2756,1098,2273, 372,1614, 708, 553,2846,2094,2278, 169,
-3626,2835,4161, 228,2674,3165, 809,1454,1309, 466,1705,1095, 900,3423, 880,2667,
-3751,5258,2317,3109,2571,4317,2766,1503,1342, 866,4447,1118,  63,2076, 314,1881,
-1348,1061, 172, 978,3515,1747, 532, 511,3970,   6, 601, 905,2699,3300,1751, 276,
-1467,3725,2668,  65,4239,2544,2779,2556,1604, 578,2451,1802, 992,2331,2624,1320,
-3446, 713,1513,1013, 103,2786,2447,1661, 886,1702, 916, 654,3574,2031,1556, 751,
-2178,2821,2179,1498,1538,2176, 271, 914,2251,2080,1325, 638,1953,2937,3877,2432,
-2754,  95,3265,1716, 260,1227,4083, 775, 106,1357,3254, 426,1607, 555,2480, 772,
-1985, 244,2546, 474, 495,1046,2611,1851,2061,  71,2089,1675,2590, 742,3758,2843,
-3222,1433, 267,2180,2576,2826,2233,2092,3913,2435, 956,1745,3075, 856,2113,1116,
- 451,   3,1988,2896,1398, 993,2463,1878,2049,1341,2718,2721,2870,2108, 712,2904,
-4363,2753,2324, 277,2872,2349,2649, 384, 987, 435, 691,3000, 922, 164,3939, 652,
-1500,1184,4153,2482,3373,2165,4848,2335,3775,3508,3154,2806,2830,1554,2102,1664,
-2530,1434,2408, 893,1547,2623,3447,2832,2242,2532,3169,2856,3223,2078,  49,3770,
-3469, 462, 318, 656,2259,3250,3069, 679,1629,2758, 344,1138,1104,3120,1836,1283,
-3115,2154,1437,4448, 934, 759,1999, 794,2862,1038, 533,2560,1722,2342, 855,2626,
-1197,1663,4476,3127,  85,4240,2528,  25,1111,1181,3673, 407,3470,4561,2679,2713,
- 768,1925,2841,3986,1544,1165, 932, 373,1240,2146,1930,2673, 721,4766, 354,4333,
- 391,2963, 187,  61,3364,1442,1102, 330,1940,1767, 341,3809,4118, 393,2496,2062,
-2211, 105, 331, 300, 439, 913,1332, 626, 379,3304,1557, 328, 689,3952, 309,1555,
- 931, 317,2517,3027, 325, 569, 686,2107,3084,  60,1042,1333,2794, 264,3177,4014,
-1628, 258,3712,   7,4464,1176,1043,1778, 683, 114,1975,  78,1492, 383,1886, 510,
- 386, 645,5291,2891,2069,3305,4138,3867,2939,2603,2493,1935,1066,1848,3588,1015,
-1282,1289,4609, 697,1453,3044,2666,3611,1856,2412,  54, 719,1330, 568,3778,2459,
-1748, 788, 492, 551,1191,1000, 488,3394,3763, 282,1799, 348,2016,1523,3155,2390,
-1049, 382,2019,1788,1170, 729,2968,3523, 897,3926,2785,2938,3292, 350,2319,3238,
-1718,1717,2655,3453,3143,4465, 161,2889,2980,2009,1421,  56,1908,1640,2387,2232,
-1917,1874,2477,4921, 148,  83,3438, 592,4245,2882,1822,1055, 741, 115,1496,1624,
- 381,1638,4592,1020, 516,3214, 458, 947,4575,1432, 211,1514,2926,1865,2142, 189,
- 852,1221,1400,1486, 882,2299,4036, 351,  28,1122, 700,6479,6480,6481,6482,6483,  #last 512
-)
-
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/gb2312prober.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/gb2312prober.py
deleted file mode 100644
index 8446d2d..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/gb2312prober.py
+++ /dev/null
@@ -1,46 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is mozilla.org code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .mbcharsetprober import MultiByteCharSetProber
-from .codingstatemachine import CodingStateMachine
-from .chardistribution import GB2312DistributionAnalysis
-from .mbcssm import GB2312_SM_MODEL
-
-class GB2312Prober(MultiByteCharSetProber):
-    def __init__(self):
-        super(GB2312Prober, self).__init__()
-        self.coding_sm = CodingStateMachine(GB2312_SM_MODEL)
-        self.distribution_analyzer = GB2312DistributionAnalysis()
-        self.reset()
-
-    @property
-    def charset_name(self):
-        return "GB2312"
-
-    @property
-    def language(self):
-        return "Chinese"
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/hebrewprober.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/hebrewprober.py
deleted file mode 100644
index b0e1bf4..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/hebrewprober.py
+++ /dev/null
@@ -1,292 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Universal charset detector code.
-#
-# The Initial Developer of the Original Code is
-#          Shy Shalom
-# Portions created by the Initial Developer are Copyright (C) 2005
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .charsetprober import CharSetProber
-from .enums import ProbingState
-
-# This prober doesn't actually recognize a language or a charset.
-# It is a helper prober for the use of the Hebrew model probers
-
-### General ideas of the Hebrew charset recognition ###
-#
-# Four main charsets exist in Hebrew:
-# "ISO-8859-8" - Visual Hebrew
-# "windows-1255" - Logical Hebrew
-# "ISO-8859-8-I" - Logical Hebrew
-# "x-mac-hebrew" - ?? Logical Hebrew ??
-#
-# Both "ISO" charsets use a completely identical set of code points, whereas
-# "windows-1255" and "x-mac-hebrew" are two different proper supersets of
-# these code points. windows-1255 defines additional characters in the range
-# 0x80-0x9F as some misc punctuation marks as well as some Hebrew-specific
-# diacritics and additional 'Yiddish' ligature letters in the range 0xc0-0xd6.
-# x-mac-hebrew defines similar additional code points but with a different
-# mapping.
-#
-# As far as an average Hebrew text with no diacritics is concerned, all four
-# charsets are identical with respect to code points. Meaning that for the
-# main Hebrew alphabet, all four map the same values to all 27 Hebrew letters
-# (including final letters).
-#
-# The dominant difference between these charsets is their directionality.
-# "Visual" directionality means that the text is ordered as if the renderer is
-# not aware of a BIDI rendering algorithm. The renderer sees the text and
-# draws it from left to right. The text itself when ordered naturally is read
-# backwards. A buffer of Visual Hebrew generally looks like so:
-# "[last word of first line spelled backwards] [whole line ordered backwards
-# and spelled backwards] [first word of first line spelled backwards]
-# [end of line] [last word of second line] ... etc' "
-# adding punctuation marks, numbers and English text to visual text is
-# naturally also "visual" and from left to right.
-#
-# "Logical" directionality means the text is ordered "naturally" according to
-# the order it is read. It is the responsibility of the renderer to display
-# the text from right to left. A BIDI algorithm is used to place general
-# punctuation marks, numbers and English text in the text.
-#
-# Texts in x-mac-hebrew are almost impossible to find on the Internet. From
-# what little evidence I could find, it seems that its general directionality
-# is Logical.
-#
-# To sum up all of the above, the Hebrew probing mechanism knows about two
-# charsets:
-# Visual Hebrew - "ISO-8859-8" - backwards text - Words and sentences are
-#    backwards while line order is natural. For charset recognition purposes
-#    the line order is unimportant (In fact, for this implementation, even
-#    word order is unimportant).
-# Logical Hebrew - "windows-1255" - normal, naturally ordered text.
-#
-# "ISO-8859-8-I" is a subset of windows-1255 and doesn't need to be
-#    specifically identified.
-# "x-mac-hebrew" is also identified as windows-1255. A text in x-mac-hebrew
-#    that contain special punctuation marks or diacritics is displayed with
-#    some unconverted characters showing as question marks. This problem might
-#    be corrected using another model prober for x-mac-hebrew. Due to the fact
-#    that x-mac-hebrew texts are so rare, writing another model prober isn't
-#    worth the effort and performance hit.
-#
-#### The Prober ####
-#
-# The prober is divided between two SBCharSetProbers and a HebrewProber,
-# all of which are managed, created, fed data, inquired and deleted by the
-# SBCSGroupProber. The two SBCharSetProbers identify that the text is in
-# fact some kind of Hebrew, Logical or Visual. The final decision about which
-# one is it is made by the HebrewProber by combining final-letter scores
-# with the scores of the two SBCharSetProbers to produce a final answer.
-#
-# The SBCSGroupProber is responsible for stripping the original text of HTML
-# tags, English characters, numbers, low-ASCII punctuation characters, spaces
-# and new lines. It reduces any sequence of such characters to a single space.
-# The buffer fed to each prober in the SBCS group prober is pure text in
-# high-ASCII.
-# The two SBCharSetProbers (model probers) share the same language model:
-# Win1255Model.
-# The first SBCharSetProber uses the model normally as any other
-# SBCharSetProber does, to recognize windows-1255, upon which this model was
-# built. The second SBCharSetProber is told to make the pair-of-letter
-# lookup in the language model backwards. This in practice exactly simulates
-# a visual Hebrew model using the windows-1255 logical Hebrew model.
-#
-# The HebrewProber is not using any language model. All it does is look for
-# final-letter evidence suggesting the text is either logical Hebrew or visual
-# Hebrew. Disjointed from the model probers, the results of the HebrewProber
-# alone are meaningless. HebrewProber always returns 0.00 as confidence
-# since it never identifies a charset by itself. Instead, the pointer to the
-# HebrewProber is passed to the model probers as a helper "Name Prober".
-# When the Group prober receives a positive identification from any prober,
-# it asks for the name of the charset identified. If the prober queried is a
-# Hebrew model prober, the model prober forwards the call to the
-# HebrewProber to make the final decision. In the HebrewProber, the
-# decision is made according to the final-letters scores maintained and Both
-# model probers scores. The answer is returned in the form of the name of the
-# charset identified, either "windows-1255" or "ISO-8859-8".
-
-class HebrewProber(CharSetProber):
-    # windows-1255 / ISO-8859-8 code points of interest
-    FINAL_KAF = 0xea
-    NORMAL_KAF = 0xeb
-    FINAL_MEM = 0xed
-    NORMAL_MEM = 0xee
-    FINAL_NUN = 0xef
-    NORMAL_NUN = 0xf0
-    FINAL_PE = 0xf3
-    NORMAL_PE = 0xf4
-    FINAL_TSADI = 0xf5
-    NORMAL_TSADI = 0xf6
-
-    # Minimum Visual vs Logical final letter score difference.
-    # If the difference is below this, don't rely solely on the final letter score
-    # distance.
-    MIN_FINAL_CHAR_DISTANCE = 5
-
-    # Minimum Visual vs Logical model score difference.
-    # If the difference is below this, don't rely at all on the model score
-    # distance.
-    MIN_MODEL_DISTANCE = 0.01
-
-    VISUAL_HEBREW_NAME = "ISO-8859-8"
-    LOGICAL_HEBREW_NAME = "windows-1255"
-
-    def __init__(self):
-        super(HebrewProber, self).__init__()
-        self._final_char_logical_score = None
-        self._final_char_visual_score = None
-        self._prev = None
-        self._before_prev = None
-        self._logical_prober = None
-        self._visual_prober = None
-        self.reset()
-
-    def reset(self):
-        self._final_char_logical_score = 0
-        self._final_char_visual_score = 0
-        # The two last characters seen in the previous buffer,
-        # mPrev and mBeforePrev are initialized to space in order to simulate
-        # a word delimiter at the beginning of the data
-        self._prev = ' '
-        self._before_prev = ' '
-        # These probers are owned by the group prober.
-
-    def set_model_probers(self, logicalProber, visualProber):
-        self._logical_prober = logicalProber
-        self._visual_prober = visualProber
-
-    def is_final(self, c):
-        return c in [self.FINAL_KAF, self.FINAL_MEM, self.FINAL_NUN,
-                     self.FINAL_PE, self.FINAL_TSADI]
-
-    def is_non_final(self, c):
-        # The normal Tsadi is not a good Non-Final letter due to words like
-        # 'lechotet' (to chat) containing an apostrophe after the tsadi. This
-        # apostrophe is converted to a space in FilterWithoutEnglishLetters
-        # causing the Non-Final tsadi to appear at an end of a word even
-        # though this is not the case in the original text.
-        # The letters Pe and Kaf rarely display a related behavior of not being
-        # a good Non-Final letter. Words like 'Pop', 'Winamp' and 'Mubarak'
-        # for example legally end with a Non-Final Pe or Kaf. However, the
-        # benefit of these letters as Non-Final letters outweighs the damage
-        # since these words are quite rare.
-        return c in [self.NORMAL_KAF, self.NORMAL_MEM,
-                     self.NORMAL_NUN, self.NORMAL_PE]
-
-    def feed(self, byte_str):
-        # Final letter analysis for logical-visual decision.
-        # Look for evidence that the received buffer is either logical Hebrew
-        # or visual Hebrew.
-        # The following cases are checked:
-        # 1) A word longer than 1 letter, ending with a final letter. This is
-        #    an indication that the text is laid out "naturally" since the
-        #    final letter really appears at the end. +1 for logical score.
-        # 2) A word longer than 1 letter, ending with a Non-Final letter. In
-        #    normal Hebrew, words ending with Kaf, Mem, Nun, Pe or Tsadi,
-        #    should not end with the Non-Final form of that letter. Exceptions
-        #    to this rule are mentioned above in isNonFinal(). This is an
-        #    indication that the text is laid out backwards. +1 for visual
-        #    score
-        # 3) A word longer than 1 letter, starting with a final letter. Final
-        #    letters should not appear at the beginning of a word. This is an
-        #    indication that the text is laid out backwards. +1 for visual
-        #    score.
-        #
-        # The visual score and logical score are accumulated throughout the
-        # text and are finally checked against each other in GetCharSetName().
-        # No checking for final letters in the middle of words is done since
-        # that case is not an indication for either Logical or Visual text.
-        #
-        # We automatically filter out all 7-bit characters (replace them with
-        # spaces) so the word boundary detection works properly. [MAP]
-
-        if self.state == ProbingState.NOT_ME:
-            # Both model probers say it's not them. No reason to continue.
-            return ProbingState.NOT_ME
-
-        byte_str = self.filter_high_byte_only(byte_str)
-
-        for cur in byte_str:
-            if cur == ' ':
-                # We stand on a space - a word just ended
-                if self._before_prev != ' ':
-                    # next-to-last char was not a space so self._prev is not a
-                    # 1 letter word
-                    if self.is_final(self._prev):
-                        # case (1) [-2:not space][-1:final letter][cur:space]
-                        self._final_char_logical_score += 1
-                    elif self.is_non_final(self._prev):
-                        # case (2) [-2:not space][-1:Non-Final letter][
-                        #  cur:space]
-                        self._final_char_visual_score += 1
-            else:
-                # Not standing on a space
-                if ((self._before_prev == ' ') and
-                        (self.is_final(self._prev)) and (cur != ' ')):
-                    # case (3) [-2:space][-1:final letter][cur:not space]
-                    self._final_char_visual_score += 1
-            self._before_prev = self._prev
-            self._prev = cur
-
-        # Forever detecting, till the end or until both model probers return
-        # ProbingState.NOT_ME (handled above)
-        return ProbingState.DETECTING
-
-    @property
-    def charset_name(self):
-        # Make the decision: is it Logical or Visual?
-        # If the final letter score distance is dominant enough, rely on it.
-        finalsub = self._final_char_logical_score - self._final_char_visual_score
-        if finalsub >= self.MIN_FINAL_CHAR_DISTANCE:
-            return self.LOGICAL_HEBREW_NAME
-        if finalsub <= -self.MIN_FINAL_CHAR_DISTANCE:
-            return self.VISUAL_HEBREW_NAME
-
-        # It's not dominant enough, try to rely on the model scores instead.
-        modelsub = (self._logical_prober.get_confidence()
-                    - self._visual_prober.get_confidence())
-        if modelsub > self.MIN_MODEL_DISTANCE:
-            return self.LOGICAL_HEBREW_NAME
-        if modelsub < -self.MIN_MODEL_DISTANCE:
-            return self.VISUAL_HEBREW_NAME
-
-        # Still no good, back to final letter distance, maybe it'll save the
-        # day.
-        if finalsub < 0.0:
-            return self.VISUAL_HEBREW_NAME
-
-        # (finalsub > 0 - Logical) or (don't know what to do) default to
-        # Logical.
-        return self.LOGICAL_HEBREW_NAME
-
-    @property
-    def language(self):
-        return 'Hebrew'
-
-    @property
-    def state(self):
-        # Remain active as long as any of the model probers are active.
-        if (self._logical_prober.state == ProbingState.NOT_ME) and \
-           (self._visual_prober.state == ProbingState.NOT_ME):
-            return ProbingState.NOT_ME
-        return ProbingState.DETECTING
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/jisfreq.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/jisfreq.py
deleted file mode 100644
index 83fc082..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/jisfreq.py
+++ /dev/null
@@ -1,325 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-# Sampling from about 20M text materials include literature and computer technology
-#
-# Japanese frequency table, applied to both S-JIS and EUC-JP
-# They are sorted in order.
-
-# 128  --> 0.77094
-# 256  --> 0.85710
-# 512  --> 0.92635
-# 1024 --> 0.97130
-# 2048 --> 0.99431
-#
-# Ideal Distribution Ratio = 0.92635 / (1-0.92635) = 12.58
-# Random Distribution Ration = 512 / (2965+62+83+86-512) = 0.191
-#
-# Typical Distribution Ratio, 25% of IDR
-
-JIS_TYPICAL_DISTRIBUTION_RATIO = 3.0
-
-# Char to FreqOrder table ,
-JIS_TABLE_SIZE = 4368
-
-JIS_CHAR_TO_FREQ_ORDER = (
-  40,   1,   6, 182, 152, 180, 295,2127, 285, 381,3295,4304,3068,4606,3165,3510, #   16
-3511,1822,2785,4607,1193,2226,5070,4608, 171,2996,1247,  18, 179,5071, 856,1661, #   32
-1262,5072, 619, 127,3431,3512,3230,1899,1700, 232, 228,1294,1298, 284, 283,2041, #   48
-2042,1061,1062,  48,  49,  44,  45, 433, 434,1040,1041, 996, 787,2997,1255,4305, #   64
-2108,4609,1684,1648,5073,5074,5075,5076,5077,5078,3687,5079,4610,5080,3927,3928, #   80
-5081,3296,3432, 290,2285,1471,2187,5082,2580,2825,1303,2140,1739,1445,2691,3375, #   96
-1691,3297,4306,4307,4611, 452,3376,1182,2713,3688,3069,4308,5083,5084,5085,5086, #  112
-5087,5088,5089,5090,5091,5092,5093,5094,5095,5096,5097,5098,5099,5100,5101,5102, #  128
-5103,5104,5105,5106,5107,5108,5109,5110,5111,5112,4097,5113,5114,5115,5116,5117, #  144
-5118,5119,5120,5121,5122,5123,5124,5125,5126,5127,5128,5129,5130,5131,5132,5133, #  160
-5134,5135,5136,5137,5138,5139,5140,5141,5142,5143,5144,5145,5146,5147,5148,5149, #  176
-5150,5151,5152,4612,5153,5154,5155,5156,5157,5158,5159,5160,5161,5162,5163,5164, #  192
-5165,5166,5167,5168,5169,5170,5171,5172,5173,5174,5175,1472, 598, 618, 820,1205, #  208
-1309,1412,1858,1307,1692,5176,5177,5178,5179,5180,5181,5182,1142,1452,1234,1172, #  224
-1875,2043,2149,1793,1382,2973, 925,2404,1067,1241, 960,1377,2935,1491, 919,1217, #  240
-1865,2030,1406,1499,2749,4098,5183,5184,5185,5186,5187,5188,2561,4099,3117,1804, #  256
-2049,3689,4309,3513,1663,5189,3166,3118,3298,1587,1561,3433,5190,3119,1625,2998, #  272
-3299,4613,1766,3690,2786,4614,5191,5192,5193,5194,2161,  26,3377,   2,3929,  20, #  288
-3691,  47,4100,  50,  17,  16,  35, 268,  27, 243,  42, 155,  24, 154,  29, 184, #  304
-   4,  91,  14,  92,  53, 396,  33, 289,   9,  37,  64, 620,  21,  39, 321,   5, #  320
-  12,  11,  52,  13,   3, 208, 138,   0,   7,  60, 526, 141, 151,1069, 181, 275, #  336
-1591,  83, 132,1475, 126, 331, 829,  15,  69, 160,  59,  22, 157,  55,1079, 312, #  352
- 109,  38,  23,  25,  10,  19,  79,5195,  61, 382,1124,   8,  30,5196,5197,5198, #  368
-5199,5200,5201,5202,5203,5204,5205,5206,  89,  62,  74,  34,2416, 112, 139, 196, #  384
- 271, 149,  84, 607, 131, 765,  46,  88, 153, 683,  76, 874, 101, 258,  57,  80, #  400
-  32, 364, 121,1508, 169,1547,  68, 235, 145,2999,  41, 360,3027,  70,  63,  31, #  416
-  43, 259, 262,1383,  99, 533, 194,  66,  93, 846, 217, 192,  56, 106,  58, 565, #  432
- 280, 272, 311, 256, 146,  82, 308,  71, 100, 128, 214, 655, 110, 261, 104,1140, #  448
-  54,  51,  36,  87,  67,3070, 185,2618,2936,2020,  28,1066,2390,2059,5207,5208, #  464
-5209,5210,5211,5212,5213,5214,5215,5216,4615,5217,5218,5219,5220,5221,5222,5223, #  480
-5224,5225,5226,5227,5228,5229,5230,5231,5232,5233,5234,5235,5236,3514,5237,5238, #  496
-5239,5240,5241,5242,5243,5244,2297,2031,4616,4310,3692,5245,3071,5246,3598,5247, #  512
-4617,3231,3515,5248,4101,4311,4618,3808,4312,4102,5249,4103,4104,3599,5250,5251, #  528
-5252,5253,5254,5255,5256,5257,5258,5259,5260,5261,5262,5263,5264,5265,5266,5267, #  544
-5268,5269,5270,5271,5272,5273,5274,5275,5276,5277,5278,5279,5280,5281,5282,5283, #  560
-5284,5285,5286,5287,5288,5289,5290,5291,5292,5293,5294,5295,5296,5297,5298,5299, #  576
-5300,5301,5302,5303,5304,5305,5306,5307,5308,5309,5310,5311,5312,5313,5314,5315, #  592
-5316,5317,5318,5319,5320,5321,5322,5323,5324,5325,5326,5327,5328,5329,5330,5331, #  608
-5332,5333,5334,5335,5336,5337,5338,5339,5340,5341,5342,5343,5344,5345,5346,5347, #  624
-5348,5349,5350,5351,5352,5353,5354,5355,5356,5357,5358,5359,5360,5361,5362,5363, #  640
-5364,5365,5366,5367,5368,5369,5370,5371,5372,5373,5374,5375,5376,5377,5378,5379, #  656
-5380,5381, 363, 642,2787,2878,2788,2789,2316,3232,2317,3434,2011, 165,1942,3930, #  672
-3931,3932,3933,5382,4619,5383,4620,5384,5385,5386,5387,5388,5389,5390,5391,5392, #  688
-5393,5394,5395,5396,5397,5398,5399,5400,5401,5402,5403,5404,5405,5406,5407,5408, #  704
-5409,5410,5411,5412,5413,5414,5415,5416,5417,5418,5419,5420,5421,5422,5423,5424, #  720
-5425,5426,5427,5428,5429,5430,5431,5432,5433,5434,5435,5436,5437,5438,5439,5440, #  736
-5441,5442,5443,5444,5445,5446,5447,5448,5449,5450,5451,5452,5453,5454,5455,5456, #  752
-5457,5458,5459,5460,5461,5462,5463,5464,5465,5466,5467,5468,5469,5470,5471,5472, #  768
-5473,5474,5475,5476,5477,5478,5479,5480,5481,5482,5483,5484,5485,5486,5487,5488, #  784
-5489,5490,5491,5492,5493,5494,5495,5496,5497,5498,5499,5500,5501,5502,5503,5504, #  800
-5505,5506,5507,5508,5509,5510,5511,5512,5513,5514,5515,5516,5517,5518,5519,5520, #  816
-5521,5522,5523,5524,5525,5526,5527,5528,5529,5530,5531,5532,5533,5534,5535,5536, #  832
-5537,5538,5539,5540,5541,5542,5543,5544,5545,5546,5547,5548,5549,5550,5551,5552, #  848
-5553,5554,5555,5556,5557,5558,5559,5560,5561,5562,5563,5564,5565,5566,5567,5568, #  864
-5569,5570,5571,5572,5573,5574,5575,5576,5577,5578,5579,5580,5581,5582,5583,5584, #  880
-5585,5586,5587,5588,5589,5590,5591,5592,5593,5594,5595,5596,5597,5598,5599,5600, #  896
-5601,5602,5603,5604,5605,5606,5607,5608,5609,5610,5611,5612,5613,5614,5615,5616, #  912
-5617,5618,5619,5620,5621,5622,5623,5624,5625,5626,5627,5628,5629,5630,5631,5632, #  928
-5633,5634,5635,5636,5637,5638,5639,5640,5641,5642,5643,5644,5645,5646,5647,5648, #  944
-5649,5650,5651,5652,5653,5654,5655,5656,5657,5658,5659,5660,5661,5662,5663,5664, #  960
-5665,5666,5667,5668,5669,5670,5671,5672,5673,5674,5675,5676,5677,5678,5679,5680, #  976
-5681,5682,5683,5684,5685,5686,5687,5688,5689,5690,5691,5692,5693,5694,5695,5696, #  992
-5697,5698,5699,5700,5701,5702,5703,5704,5705,5706,5707,5708,5709,5710,5711,5712, # 1008
-5713,5714,5715,5716,5717,5718,5719,5720,5721,5722,5723,5724,5725,5726,5727,5728, # 1024
-5729,5730,5731,5732,5733,5734,5735,5736,5737,5738,5739,5740,5741,5742,5743,5744, # 1040
-5745,5746,5747,5748,5749,5750,5751,5752,5753,5754,5755,5756,5757,5758,5759,5760, # 1056
-5761,5762,5763,5764,5765,5766,5767,5768,5769,5770,5771,5772,5773,5774,5775,5776, # 1072
-5777,5778,5779,5780,5781,5782,5783,5784,5785,5786,5787,5788,5789,5790,5791,5792, # 1088
-5793,5794,5795,5796,5797,5798,5799,5800,5801,5802,5803,5804,5805,5806,5807,5808, # 1104
-5809,5810,5811,5812,5813,5814,5815,5816,5817,5818,5819,5820,5821,5822,5823,5824, # 1120
-5825,5826,5827,5828,5829,5830,5831,5832,5833,5834,5835,5836,5837,5838,5839,5840, # 1136
-5841,5842,5843,5844,5845,5846,5847,5848,5849,5850,5851,5852,5853,5854,5855,5856, # 1152
-5857,5858,5859,5860,5861,5862,5863,5864,5865,5866,5867,5868,5869,5870,5871,5872, # 1168
-5873,5874,5875,5876,5877,5878,5879,5880,5881,5882,5883,5884,5885,5886,5887,5888, # 1184
-5889,5890,5891,5892,5893,5894,5895,5896,5897,5898,5899,5900,5901,5902,5903,5904, # 1200
-5905,5906,5907,5908,5909,5910,5911,5912,5913,5914,5915,5916,5917,5918,5919,5920, # 1216
-5921,5922,5923,5924,5925,5926,5927,5928,5929,5930,5931,5932,5933,5934,5935,5936, # 1232
-5937,5938,5939,5940,5941,5942,5943,5944,5945,5946,5947,5948,5949,5950,5951,5952, # 1248
-5953,5954,5955,5956,5957,5958,5959,5960,5961,5962,5963,5964,5965,5966,5967,5968, # 1264
-5969,5970,5971,5972,5973,5974,5975,5976,5977,5978,5979,5980,5981,5982,5983,5984, # 1280
-5985,5986,5987,5988,5989,5990,5991,5992,5993,5994,5995,5996,5997,5998,5999,6000, # 1296
-6001,6002,6003,6004,6005,6006,6007,6008,6009,6010,6011,6012,6013,6014,6015,6016, # 1312
-6017,6018,6019,6020,6021,6022,6023,6024,6025,6026,6027,6028,6029,6030,6031,6032, # 1328
-6033,6034,6035,6036,6037,6038,6039,6040,6041,6042,6043,6044,6045,6046,6047,6048, # 1344
-6049,6050,6051,6052,6053,6054,6055,6056,6057,6058,6059,6060,6061,6062,6063,6064, # 1360
-6065,6066,6067,6068,6069,6070,6071,6072,6073,6074,6075,6076,6077,6078,6079,6080, # 1376
-6081,6082,6083,6084,6085,6086,6087,6088,6089,6090,6091,6092,6093,6094,6095,6096, # 1392
-6097,6098,6099,6100,6101,6102,6103,6104,6105,6106,6107,6108,6109,6110,6111,6112, # 1408
-6113,6114,2044,2060,4621, 997,1235, 473,1186,4622, 920,3378,6115,6116, 379,1108, # 1424
-4313,2657,2735,3934,6117,3809, 636,3233, 573,1026,3693,3435,2974,3300,2298,4105, # 1440
- 854,2937,2463, 393,2581,2417, 539, 752,1280,2750,2480, 140,1161, 440, 708,1569, # 1456
- 665,2497,1746,1291,1523,3000, 164,1603, 847,1331, 537,1997, 486, 508,1693,2418, # 1472
-1970,2227, 878,1220, 299,1030, 969, 652,2751, 624,1137,3301,2619,  65,3302,2045, # 1488
-1761,1859,3120,1930,3694,3516, 663,1767, 852, 835,3695, 269, 767,2826,2339,1305, # 1504
- 896,1150, 770,1616,6118, 506,1502,2075,1012,2519, 775,2520,2975,2340,2938,4314, # 1520
-3028,2086,1224,1943,2286,6119,3072,4315,2240,1273,1987,3935,1557, 175, 597, 985, # 1536
-3517,2419,2521,1416,3029, 585, 938,1931,1007,1052,1932,1685,6120,3379,4316,4623, # 1552
- 804, 599,3121,1333,2128,2539,1159,1554,2032,3810, 687,2033,2904, 952, 675,1467, # 1568
-3436,6121,2241,1096,1786,2440,1543,1924, 980,1813,2228, 781,2692,1879, 728,1918, # 1584
-3696,4624, 548,1950,4625,1809,1088,1356,3303,2522,1944, 502, 972, 373, 513,2827, # 1600
- 586,2377,2391,1003,1976,1631,6122,2464,1084, 648,1776,4626,2141, 324, 962,2012, # 1616
-2177,2076,1384, 742,2178,1448,1173,1810, 222, 102, 301, 445, 125,2420, 662,2498, # 1632
- 277, 200,1476,1165,1068, 224,2562,1378,1446, 450,1880, 659, 791, 582,4627,2939, # 1648
-3936,1516,1274, 555,2099,3697,1020,1389,1526,3380,1762,1723,1787,2229, 412,2114, # 1664
-1900,2392,3518, 512,2597, 427,1925,2341,3122,1653,1686,2465,2499, 697, 330, 273, # 1680
- 380,2162, 951, 832, 780, 991,1301,3073, 965,2270,3519, 668,2523,2636,1286, 535, # 1696
-1407, 518, 671, 957,2658,2378, 267, 611,2197,3030,6123, 248,2299, 967,1799,2356, # 1712
- 850,1418,3437,1876,1256,1480,2828,1718,6124,6125,1755,1664,2405,6126,4628,2879, # 1728
-2829, 499,2179, 676,4629, 557,2329,2214,2090, 325,3234, 464, 811,3001, 992,2342, # 1744
-2481,1232,1469, 303,2242, 466,1070,2163, 603,1777,2091,4630,2752,4631,2714, 322, # 1760
-2659,1964,1768, 481,2188,1463,2330,2857,3600,2092,3031,2421,4632,2318,2070,1849, # 1776
-2598,4633,1302,2254,1668,1701,2422,3811,2905,3032,3123,2046,4106,1763,1694,4634, # 1792
-1604, 943,1724,1454, 917, 868,2215,1169,2940, 552,1145,1800,1228,1823,1955, 316, # 1808
-1080,2510, 361,1807,2830,4107,2660,3381,1346,1423,1134,4108,6127, 541,1263,1229, # 1824
-1148,2540, 545, 465,1833,2880,3438,1901,3074,2482, 816,3937, 713,1788,2500, 122, # 1840
-1575, 195,1451,2501,1111,6128, 859, 374,1225,2243,2483,4317, 390,1033,3439,3075, # 1856
-2524,1687, 266, 793,1440,2599, 946, 779, 802, 507, 897,1081, 528,2189,1292, 711, # 1872
-1866,1725,1167,1640, 753, 398,2661,1053, 246, 348,4318, 137,1024,3440,1600,2077, # 1888
-2129, 825,4319, 698, 238, 521, 187,2300,1157,2423,1641,1605,1464,1610,1097,2541, # 1904
-1260,1436, 759,2255,1814,2150, 705,3235, 409,2563,3304, 561,3033,2005,2564, 726, # 1920
-1956,2343,3698,4109, 949,3812,3813,3520,1669, 653,1379,2525, 881,2198, 632,2256, # 1936
-1027, 778,1074, 733,1957, 514,1481,2466, 554,2180, 702,3938,1606,1017,1398,6129, # 1952
-1380,3521, 921, 993,1313, 594, 449,1489,1617,1166, 768,1426,1360, 495,1794,3601, # 1968
-1177,3602,1170,4320,2344, 476, 425,3167,4635,3168,1424, 401,2662,1171,3382,1998, # 1984
-1089,4110, 477,3169, 474,6130,1909, 596,2831,1842, 494, 693,1051,1028,1207,3076, # 2000
- 606,2115, 727,2790,1473,1115, 743,3522, 630, 805,1532,4321,2021, 366,1057, 838, # 2016
- 684,1114,2142,4322,2050,1492,1892,1808,2271,3814,2424,1971,1447,1373,3305,1090, # 2032
-1536,3939,3523,3306,1455,2199, 336, 369,2331,1035, 584,2393, 902, 718,2600,6131, # 2048
-2753, 463,2151,1149,1611,2467, 715,1308,3124,1268, 343,1413,3236,1517,1347,2663, # 2064
-2093,3940,2022,1131,1553,2100,2941,1427,3441,2942,1323,2484,6132,1980, 872,2368, # 2080
-2441,2943, 320,2369,2116,1082, 679,1933,3941,2791,3815, 625,1143,2023, 422,2200, # 2096
-3816,6133, 730,1695, 356,2257,1626,2301,2858,2637,1627,1778, 937, 883,2906,2693, # 2112
-3002,1769,1086, 400,1063,1325,3307,2792,4111,3077, 456,2345,1046, 747,6134,1524, # 2128
- 884,1094,3383,1474,2164,1059, 974,1688,2181,2258,1047, 345,1665,1187, 358, 875, # 2144
-3170, 305, 660,3524,2190,1334,1135,3171,1540,1649,2542,1527, 927, 968,2793, 885, # 2160
-1972,1850, 482, 500,2638,1218,1109,1085,2543,1654,2034, 876,  78,2287,1482,1277, # 2176
- 861,1675,1083,1779, 724,2754, 454, 397,1132,1612,2332, 893, 672,1237, 257,2259, # 2192
-2370, 135,3384, 337,2244, 547, 352, 340, 709,2485,1400, 788,1138,2511, 540, 772, # 2208
-1682,2260,2272,2544,2013,1843,1902,4636,1999,1562,2288,4637,2201,1403,1533, 407, # 2224
- 576,3308,1254,2071, 978,3385, 170, 136,1201,3125,2664,3172,2394, 213, 912, 873, # 2240
-3603,1713,2202, 699,3604,3699, 813,3442, 493, 531,1054, 468,2907,1483, 304, 281, # 2256
-4112,1726,1252,2094, 339,2319,2130,2639, 756,1563,2944, 748, 571,2976,1588,2425, # 2272
-2715,1851,1460,2426,1528,1392,1973,3237, 288,3309, 685,3386, 296, 892,2716,2216, # 2288
-1570,2245, 722,1747,2217, 905,3238,1103,6135,1893,1441,1965, 251,1805,2371,3700, # 2304
-2601,1919,1078,  75,2182,1509,1592,1270,2640,4638,2152,6136,3310,3817, 524, 706, # 2320
-1075, 292,3818,1756,2602, 317,  98,3173,3605,3525,1844,2218,3819,2502, 814, 567, # 2336
- 385,2908,1534,6137, 534,1642,3239, 797,6138,1670,1529, 953,4323, 188,1071, 538, # 2352
- 178, 729,3240,2109,1226,1374,2000,2357,2977, 731,2468,1116,2014,2051,6139,1261, # 2368
-1593, 803,2859,2736,3443, 556, 682, 823,1541,6140,1369,2289,1706,2794, 845, 462, # 2384
-2603,2665,1361, 387, 162,2358,1740, 739,1770,1720,1304,1401,3241,1049, 627,1571, # 2400
-2427,3526,1877,3942,1852,1500, 431,1910,1503, 677, 297,2795, 286,1433,1038,1198, # 2416
-2290,1133,1596,4113,4639,2469,1510,1484,3943,6141,2442, 108, 712,4640,2372, 866, # 2432
-3701,2755,3242,1348, 834,1945,1408,3527,2395,3243,1811, 824, 994,1179,2110,1548, # 2448
-1453, 790,3003, 690,4324,4325,2832,2909,3820,1860,3821, 225,1748, 310, 346,1780, # 2464
-2470, 821,1993,2717,2796, 828, 877,3528,2860,2471,1702,2165,2910,2486,1789, 453, # 2480
- 359,2291,1676,  73,1164,1461,1127,3311, 421, 604, 314,1037, 589, 116,2487, 737, # 2496
- 837,1180, 111, 244, 735,6142,2261,1861,1362, 986, 523, 418, 581,2666,3822, 103, # 2512
- 855, 503,1414,1867,2488,1091, 657,1597, 979, 605,1316,4641,1021,2443,2078,2001, # 2528
-1209,  96, 587,2166,1032, 260,1072,2153, 173,  94, 226,3244, 819,2006,4642,4114, # 2544
-2203, 231,1744, 782,  97,2667, 786,3387, 887, 391, 442,2219,4326,1425,6143,2694, # 2560
- 633,1544,1202, 483,2015, 592,2052,1958,2472,1655, 419, 129,4327,3444,3312,1714, # 2576
-1257,3078,4328,1518,1098, 865,1310,1019,1885,1512,1734, 469,2444, 148, 773, 436, # 2592
-1815,1868,1128,1055,4329,1245,2756,3445,2154,1934,1039,4643, 579,1238, 932,2320, # 2608
- 353, 205, 801, 115,2428, 944,2321,1881, 399,2565,1211, 678, 766,3944, 335,2101, # 2624
-1459,1781,1402,3945,2737,2131,1010, 844, 981,1326,1013, 550,1816,1545,2620,1335, # 2640
-1008, 371,2881, 936,1419,1613,3529,1456,1395,2273,1834,2604,1317,2738,2503, 416, # 2656
-1643,4330, 806,1126, 229, 591,3946,1314,1981,1576,1837,1666, 347,1790, 977,3313, # 2672
- 764,2861,1853, 688,2429,1920,1462,  77, 595, 415,2002,3034, 798,1192,4115,6144, # 2688
-2978,4331,3035,2695,2582,2072,2566, 430,2430,1727, 842,1396,3947,3702, 613, 377, # 2704
- 278, 236,1417,3388,3314,3174, 757,1869, 107,3530,6145,1194, 623,2262, 207,1253, # 2720
-2167,3446,3948, 492,1117,1935, 536,1838,2757,1246,4332, 696,2095,2406,1393,1572, # 2736
-3175,1782, 583, 190, 253,1390,2230, 830,3126,3389, 934,3245,1703,1749,2979,1870, # 2752
-2545,1656,2204, 869,2346,4116,3176,1817, 496,1764,4644, 942,1504, 404,1903,1122, # 2768
-1580,3606,2945,1022, 515, 372,1735, 955,2431,3036,6146,2797,1110,2302,2798, 617, # 2784
-6147, 441, 762,1771,3447,3607,3608,1904, 840,3037,  86, 939,1385, 572,1370,2445, # 2800
-1336, 114,3703, 898, 294, 203,3315, 703,1583,2274, 429, 961,4333,1854,1951,3390, # 2816
-2373,3704,4334,1318,1381, 966,1911,2322,1006,1155, 309, 989, 458,2718,1795,1372, # 2832
-1203, 252,1689,1363,3177, 517,1936, 168,1490, 562, 193,3823,1042,4117,1835, 551, # 2848
- 470,4645, 395, 489,3448,1871,1465,2583,2641, 417,1493, 279,1295, 511,1236,1119, # 2864
-  72,1231,1982,1812,3004, 871,1564, 984,3449,1667,2696,2096,4646,2347,2833,1673, # 2880
-3609, 695,3246,2668, 807,1183,4647, 890, 388,2333,1801,1457,2911,1765,1477,1031, # 2896
-3316,3317,1278,3391,2799,2292,2526, 163,3450,4335,2669,1404,1802,6148,2323,2407, # 2912
-1584,1728,1494,1824,1269, 298, 909,3318,1034,1632, 375, 776,1683,2061, 291, 210, # 2928
-1123, 809,1249,1002,2642,3038, 206,1011,2132, 144, 975, 882,1565, 342, 667, 754, # 2944
-1442,2143,1299,2303,2062, 447, 626,2205,1221,2739,2912,1144,1214,2206,2584, 760, # 2960
-1715, 614, 950,1281,2670,2621, 810, 577,1287,2546,4648, 242,2168, 250,2643, 691, # 2976
- 123,2644, 647, 313,1029, 689,1357,2946,1650, 216, 771,1339,1306, 808,2063, 549, # 2992
- 913,1371,2913,2914,6149,1466,1092,1174,1196,1311,2605,2396,1783,1796,3079, 406, # 3008
-2671,2117,3949,4649, 487,1825,2220,6150,2915, 448,2348,1073,6151,2397,1707, 130, # 3024
- 900,1598, 329, 176,1959,2527,1620,6152,2275,4336,3319,1983,2191,3705,3610,2155, # 3040
-3706,1912,1513,1614,6153,1988, 646, 392,2304,1589,3320,3039,1826,1239,1352,1340, # 3056
-2916, 505,2567,1709,1437,2408,2547, 906,6154,2672, 384,1458,1594,1100,1329, 710, # 3072
- 423,3531,2064,2231,2622,1989,2673,1087,1882, 333, 841,3005,1296,2882,2379, 580, # 3088
-1937,1827,1293,2585, 601, 574, 249,1772,4118,2079,1120, 645, 901,1176,1690, 795, # 3104
-2207, 478,1434, 516,1190,1530, 761,2080, 930,1264, 355, 435,1552, 644,1791, 987, # 3120
- 220,1364,1163,1121,1538, 306,2169,1327,1222, 546,2645, 218, 241, 610,1704,3321, # 3136
-1984,1839,1966,2528, 451,6155,2586,3707,2568, 907,3178, 254,2947, 186,1845,4650, # 3152
- 745, 432,1757, 428,1633, 888,2246,2221,2489,3611,2118,1258,1265, 956,3127,1784, # 3168
-4337,2490, 319, 510, 119, 457,3612, 274,2035,2007,4651,1409,3128, 970,2758, 590, # 3184
-2800, 661,2247,4652,2008,3950,1420,1549,3080,3322,3951,1651,1375,2111, 485,2491, # 3200
-1429,1156,6156,2548,2183,1495, 831,1840,2529,2446, 501,1657, 307,1894,3247,1341, # 3216
- 666, 899,2156,1539,2549,1559, 886, 349,2208,3081,2305,1736,3824,2170,2759,1014, # 3232
-1913,1386, 542,1397,2948, 490, 368, 716, 362, 159, 282,2569,1129,1658,1288,1750, # 3248
-2674, 276, 649,2016, 751,1496, 658,1818,1284,1862,2209,2087,2512,3451, 622,2834, # 3264
- 376, 117,1060,2053,1208,1721,1101,1443, 247,1250,3179,1792,3952,2760,2398,3953, # 3280
-6157,2144,3708, 446,2432,1151,2570,3452,2447,2761,2835,1210,2448,3082, 424,2222, # 3296
-1251,2449,2119,2836, 504,1581,4338, 602, 817, 857,3825,2349,2306, 357,3826,1470, # 3312
-1883,2883, 255, 958, 929,2917,3248, 302,4653,1050,1271,1751,2307,1952,1430,2697, # 3328
-2719,2359, 354,3180, 777, 158,2036,4339,1659,4340,4654,2308,2949,2248,1146,2232, # 3344
-3532,2720,1696,2623,3827,6158,3129,1550,2698,1485,1297,1428, 637, 931,2721,2145, # 3360
- 914,2550,2587,  81,2450, 612, 827,2646,1242,4655,1118,2884, 472,1855,3181,3533, # 3376
-3534, 569,1353,2699,1244,1758,2588,4119,2009,2762,2171,3709,1312,1531,6159,1152, # 3392
-1938, 134,1830, 471,3710,2276,1112,1535,3323,3453,3535, 982,1337,2950, 488, 826, # 3408
- 674,1058,1628,4120,2017, 522,2399, 211, 568,1367,3454, 350, 293,1872,1139,3249, # 3424
-1399,1946,3006,1300,2360,3324, 588, 736,6160,2606, 744, 669,3536,3828,6161,1358, # 3440
- 199, 723, 848, 933, 851,1939,1505,1514,1338,1618,1831,4656,1634,3613, 443,2740, # 3456
-3829, 717,1947, 491,1914,6162,2551,1542,4121,1025,6163,1099,1223, 198,3040,2722, # 3472
- 370, 410,1905,2589, 998,1248,3182,2380, 519,1449,4122,1710, 947, 928,1153,4341, # 3488
-2277, 344,2624,1511, 615, 105, 161,1212,1076,1960,3130,2054,1926,1175,1906,2473, # 3504
- 414,1873,2801,6164,2309, 315,1319,3325, 318,2018,2146,2157, 963, 631, 223,4342, # 3520
-4343,2675, 479,3711,1197,2625,3712,2676,2361,6165,4344,4123,6166,2451,3183,1886, # 3536
-2184,1674,1330,1711,1635,1506, 799, 219,3250,3083,3954,1677,3713,3326,2081,3614, # 3552
-1652,2073,4657,1147,3041,1752, 643,1961, 147,1974,3955,6167,1716,2037, 918,3007, # 3568
-1994, 120,1537, 118, 609,3184,4345, 740,3455,1219, 332,1615,3830,6168,1621,2980, # 3584
-1582, 783, 212, 553,2350,3714,1349,2433,2082,4124, 889,6169,2310,1275,1410, 973, # 3600
- 166,1320,3456,1797,1215,3185,2885,1846,2590,2763,4658, 629, 822,3008, 763, 940, # 3616
-1990,2862, 439,2409,1566,1240,1622, 926,1282,1907,2764, 654,2210,1607, 327,1130, # 3632
-3956,1678,1623,6170,2434,2192, 686, 608,3831,3715, 903,3957,3042,6171,2741,1522, # 3648
-1915,1105,1555,2552,1359, 323,3251,4346,3457, 738,1354,2553,2311,2334,1828,2003, # 3664
-3832,1753,2351,1227,6172,1887,4125,1478,6173,2410,1874,1712,1847, 520,1204,2607, # 3680
- 264,4659, 836,2677,2102, 600,4660,3833,2278,3084,6174,4347,3615,1342, 640, 532, # 3696
- 543,2608,1888,2400,2591,1009,4348,1497, 341,1737,3616,2723,1394, 529,3252,1321, # 3712
- 983,4661,1515,2120, 971,2592, 924, 287,1662,3186,4349,2700,4350,1519, 908,1948, # 3728
-2452, 156, 796,1629,1486,2223,2055, 694,4126,1259,1036,3392,1213,2249,2742,1889, # 3744
-1230,3958,1015, 910, 408, 559,3617,4662, 746, 725, 935,4663,3959,3009,1289, 563, # 3760
- 867,4664,3960,1567,2981,2038,2626, 988,2263,2381,4351, 143,2374, 704,1895,6175, # 3776
-1188,3716,2088, 673,3085,2362,4352, 484,1608,1921,2765,2918, 215, 904,3618,3537, # 3792
- 894, 509, 976,3043,2701,3961,4353,2837,2982, 498,6176,6177,1102,3538,1332,3393, # 3808
-1487,1636,1637, 233, 245,3962, 383, 650, 995,3044, 460,1520,1206,2352, 749,3327, # 3824
- 530, 700, 389,1438,1560,1773,3963,2264, 719,2951,2724,3834, 870,1832,1644,1000, # 3840
- 839,2474,3717, 197,1630,3394, 365,2886,3964,1285,2133, 734, 922, 818,1106, 732, # 3856
- 480,2083,1774,3458, 923,2279,1350, 221,3086,  85,2233,2234,3835,1585,3010,2147, # 3872
-1387,1705,2382,1619,2475, 133, 239,2802,1991,1016,2084,2383, 411,2838,1113, 651, # 3888
-1985,1160,3328, 990,1863,3087,1048,1276,2647, 265,2627,1599,3253,2056, 150, 638, # 3904
-2019, 656, 853, 326,1479, 680,1439,4354,1001,1759, 413,3459,3395,2492,1431, 459, # 3920
-4355,1125,3329,2265,1953,1450,2065,2863, 849, 351,2678,3131,3254,3255,1104,1577, # 3936
- 227,1351,1645,2453,2193,1421,2887, 812,2121, 634,  95,2435, 201,2312,4665,1646, # 3952
-1671,2743,1601,2554,2702,2648,2280,1315,1366,2089,3132,1573,3718,3965,1729,1189, # 3968
- 328,2679,1077,1940,1136, 558,1283, 964,1195, 621,2074,1199,1743,3460,3619,1896, # 3984
-1916,1890,3836,2952,1154,2112,1064, 862, 378,3011,2066,2113,2803,1568,2839,6178, # 4000
-3088,2919,1941,1660,2004,1992,2194, 142, 707,1590,1708,1624,1922,1023,1836,1233, # 4016
-1004,2313, 789, 741,3620,6179,1609,2411,1200,4127,3719,3720,4666,2057,3721, 593, # 4032
-2840, 367,2920,1878,6180,3461,1521, 628,1168, 692,2211,2649, 300, 720,2067,2571, # 4048
-2953,3396, 959,2504,3966,3539,3462,1977, 701,6181, 954,1043, 800, 681, 183,3722, # 4064
-1803,1730,3540,4128,2103, 815,2314, 174, 467, 230,2454,1093,2134, 755,3541,3397, # 4080
-1141,1162,6182,1738,2039, 270,3256,2513,1005,1647,2185,3837, 858,1679,1897,1719, # 4096
-2954,2324,1806, 402, 670, 167,4129,1498,2158,2104, 750,6183, 915, 189,1680,1551, # 4112
- 455,4356,1501,2455, 405,1095,2955, 338,1586,1266,1819, 570, 641,1324, 237,1556, # 4128
-2650,1388,3723,6184,1368,2384,1343,1978,3089,2436, 879,3724, 792,1191, 758,3012, # 4144
-1411,2135,1322,4357, 240,4667,1848,3725,1574,6185, 420,3045,1546,1391, 714,4358, # 4160
-1967, 941,1864, 863, 664, 426, 560,1731,2680,1785,2864,1949,2363, 403,3330,1415, # 4176
-1279,2136,1697,2335, 204, 721,2097,3838,  90,6186,2085,2505, 191,3967, 124,2148, # 4192
-1376,1798,1178,1107,1898,1405, 860,4359,1243,1272,2375,2983,1558,2456,1638, 113, # 4208
-3621, 578,1923,2609, 880, 386,4130, 784,2186,2266,1422,2956,2172,1722, 497, 263, # 4224
-2514,1267,2412,2610, 177,2703,3542, 774,1927,1344, 616,1432,1595,1018, 172,4360, # 4240
-2325, 911,4361, 438,1468,3622, 794,3968,2024,2173,1681,1829,2957, 945, 895,3090, # 4256
- 575,2212,2476, 475,2401,2681, 785,2744,1745,2293,2555,1975,3133,2865, 394,4668, # 4272
-3839, 635,4131, 639, 202,1507,2195,2766,1345,1435,2572,3726,1908,1184,1181,2457, # 4288
-3727,3134,4362, 843,2611, 437, 916,4669, 234, 769,1884,3046,3047,3623, 833,6187, # 4304
-1639,2250,2402,1355,1185,2010,2047, 999, 525,1732,1290,1488,2612, 948,1578,3728, # 4320
-2413,2477,1216,2725,2159, 334,3840,1328,3624,2921,1525,4132, 564,1056, 891,4363, # 4336
-1444,1698,2385,2251,3729,1365,2281,2235,1717,6188, 864,3841,2515, 444, 527,2767, # 4352
-2922,3625, 544, 461,6189, 566, 209,2437,3398,2098,1065,2068,3331,3626,3257,2137, # 4368  #last 512
-)
-
-
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/jpcntx.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/jpcntx.py
deleted file mode 100644
index 20044e4..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/jpcntx.py
+++ /dev/null
@@ -1,233 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-
-# This is hiragana 2-char sequence table, the number in each cell represents its frequency category
-jp2CharContext = (
-(0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1),
-(2,4,0,4,0,3,0,4,0,3,4,4,4,2,4,3,3,4,3,2,3,3,4,2,3,3,3,2,4,1,4,3,3,1,5,4,3,4,3,4,3,5,3,0,3,5,4,2,0,3,1,0,3,3,0,3,3,0,1,1,0,4,3,0,3,3,0,4,0,2,0,3,5,5,5,5,4,0,4,1,0,3,4),
-(0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2),
-(0,4,0,5,0,5,0,4,0,4,5,4,4,3,5,3,5,1,5,3,4,3,4,4,3,4,3,3,4,3,5,4,4,3,5,5,3,5,5,5,3,5,5,3,4,5,5,3,1,3,2,0,3,4,0,4,2,0,4,2,1,5,3,2,3,5,0,4,0,2,0,5,4,4,5,4,5,0,4,0,0,4,4),
-(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0),
-(0,3,0,4,0,3,0,3,0,4,5,4,3,3,3,3,4,3,5,4,4,3,5,4,4,3,4,3,4,4,4,4,5,3,4,4,3,4,5,5,4,5,5,1,4,5,4,3,0,3,3,1,3,3,0,4,4,0,3,3,1,5,3,3,3,5,0,4,0,3,0,4,4,3,4,3,3,0,4,1,1,3,4),
-(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0),
-(0,4,0,3,0,3,0,4,0,3,4,4,3,2,2,1,2,1,3,1,3,3,3,3,3,4,3,1,3,3,5,3,3,0,4,3,0,5,4,3,3,5,4,4,3,4,4,5,0,1,2,0,1,2,0,2,2,0,1,0,0,5,2,2,1,4,0,3,0,1,0,4,4,3,5,4,3,0,2,1,0,4,3),
-(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0),
-(0,3,0,5,0,4,0,2,1,4,4,2,4,1,4,2,4,2,4,3,3,3,4,3,3,3,3,1,4,2,3,3,3,1,4,4,1,1,1,4,3,3,2,0,2,4,3,2,0,3,3,0,3,1,1,0,0,0,3,3,0,4,2,2,3,4,0,4,0,3,0,4,4,5,3,4,4,0,3,0,0,1,4),
-(1,4,0,4,0,4,0,4,0,3,5,4,4,3,4,3,5,4,3,3,4,3,5,4,4,4,4,3,4,2,4,3,3,1,5,4,3,2,4,5,4,5,5,4,4,5,4,4,0,3,2,2,3,3,0,4,3,1,3,2,1,4,3,3,4,5,0,3,0,2,0,4,5,5,4,5,4,0,4,0,0,5,4),
-(0,5,0,5,0,4,0,3,0,4,4,3,4,3,3,3,4,0,4,4,4,3,4,3,4,3,3,1,4,2,4,3,4,0,5,4,1,4,5,4,4,5,3,2,4,3,4,3,2,4,1,3,3,3,2,3,2,0,4,3,3,4,3,3,3,4,0,4,0,3,0,4,5,4,4,4,3,0,4,1,0,1,3),
-(0,3,1,4,0,3,0,2,0,3,4,4,3,1,4,2,3,3,4,3,4,3,4,3,4,4,3,2,3,1,5,4,4,1,4,4,3,5,4,4,3,5,5,4,3,4,4,3,1,2,3,1,2,2,0,3,2,0,3,1,0,5,3,3,3,4,3,3,3,3,4,4,4,4,5,4,2,0,3,3,2,4,3),
-(0,2,0,3,0,1,0,1,0,0,3,2,0,0,2,0,1,0,2,1,3,3,3,1,2,3,1,0,1,0,4,2,1,1,3,3,0,4,3,3,1,4,3,3,0,3,3,2,0,0,0,0,1,0,0,2,0,0,0,0,0,4,1,0,2,3,2,2,2,1,3,3,3,4,4,3,2,0,3,1,0,3,3),
-(0,4,0,4,0,3,0,3,0,4,4,4,3,3,3,3,3,3,4,3,4,2,4,3,4,3,3,2,4,3,4,5,4,1,4,5,3,5,4,5,3,5,4,0,3,5,5,3,1,3,3,2,2,3,0,3,4,1,3,3,2,4,3,3,3,4,0,4,0,3,0,4,5,4,4,5,3,0,4,1,0,3,4),
-(0,2,0,3,0,3,0,0,0,2,2,2,1,0,1,0,0,0,3,0,3,0,3,0,1,3,1,0,3,1,3,3,3,1,3,3,3,0,1,3,1,3,4,0,0,3,1,1,0,3,2,0,0,0,0,1,3,0,1,0,0,3,3,2,0,3,0,0,0,0,0,3,4,3,4,3,3,0,3,0,0,2,3),
-(2,3,0,3,0,2,0,1,0,3,3,4,3,1,3,1,1,1,3,1,4,3,4,3,3,3,0,0,3,1,5,4,3,1,4,3,2,5,5,4,4,4,4,3,3,4,4,4,0,2,1,1,3,2,0,1,2,0,0,1,0,4,1,3,3,3,0,3,0,1,0,4,4,4,5,5,3,0,2,0,0,4,4),
-(0,2,0,1,0,3,1,3,0,2,3,3,3,0,3,1,0,0,3,0,3,2,3,1,3,2,1,1,0,0,4,2,1,0,2,3,1,4,3,2,0,4,4,3,1,3,1,3,0,1,0,0,1,0,0,0,1,0,0,0,0,4,1,1,1,2,0,3,0,0,0,3,4,2,4,3,2,0,1,0,0,3,3),
-(0,1,0,4,0,5,0,4,0,2,4,4,2,3,3,2,3,3,5,3,3,3,4,3,4,2,3,0,4,3,3,3,4,1,4,3,2,1,5,5,3,4,5,1,3,5,4,2,0,3,3,0,1,3,0,4,2,0,1,3,1,4,3,3,3,3,0,3,0,1,0,3,4,4,4,5,5,0,3,0,1,4,5),
-(0,2,0,3,0,3,0,0,0,2,3,1,3,0,4,0,1,1,3,0,3,4,3,2,3,1,0,3,3,2,3,1,3,0,2,3,0,2,1,4,1,2,2,0,0,3,3,0,0,2,0,0,0,1,0,0,0,0,2,2,0,3,2,1,3,3,0,2,0,2,0,0,3,3,1,2,4,0,3,0,2,2,3),
-(2,4,0,5,0,4,0,4,0,2,4,4,4,3,4,3,3,3,1,2,4,3,4,3,4,4,5,0,3,3,3,3,2,0,4,3,1,4,3,4,1,4,4,3,3,4,4,3,1,2,3,0,4,2,0,4,1,0,3,3,0,4,3,3,3,4,0,4,0,2,0,3,5,3,4,5,2,0,3,0,0,4,5),
-(0,3,0,4,0,1,0,1,0,1,3,2,2,1,3,0,3,0,2,0,2,0,3,0,2,0,0,0,1,0,1,1,0,0,3,1,0,0,0,4,0,3,1,0,2,1,3,0,0,0,0,0,0,3,0,0,0,0,0,0,0,4,2,2,3,1,0,3,0,0,0,1,4,4,4,3,0,0,4,0,0,1,4),
-(1,4,1,5,0,3,0,3,0,4,5,4,4,3,5,3,3,4,4,3,4,1,3,3,3,3,2,1,4,1,5,4,3,1,4,4,3,5,4,4,3,5,4,3,3,4,4,4,0,3,3,1,2,3,0,3,1,0,3,3,0,5,4,4,4,4,4,4,3,3,5,4,4,3,3,5,4,0,3,2,0,4,4),
-(0,2,0,3,0,1,0,0,0,1,3,3,3,2,4,1,3,0,3,1,3,0,2,2,1,1,0,0,2,0,4,3,1,0,4,3,0,4,4,4,1,4,3,1,1,3,3,1,0,2,0,0,1,3,0,0,0,0,2,0,0,4,3,2,4,3,5,4,3,3,3,4,3,3,4,3,3,0,2,1,0,3,3),
-(0,2,0,4,0,3,0,2,0,2,5,5,3,4,4,4,4,1,4,3,3,0,4,3,4,3,1,3,3,2,4,3,0,3,4,3,0,3,4,4,2,4,4,0,4,5,3,3,2,2,1,1,1,2,0,1,5,0,3,3,2,4,3,3,3,4,0,3,0,2,0,4,4,3,5,5,0,0,3,0,2,3,3),
-(0,3,0,4,0,3,0,1,0,3,4,3,3,1,3,3,3,0,3,1,3,0,4,3,3,1,1,0,3,0,3,3,0,0,4,4,0,1,5,4,3,3,5,0,3,3,4,3,0,2,0,1,1,1,0,1,3,0,1,2,1,3,3,2,3,3,0,3,0,1,0,1,3,3,4,4,1,0,1,2,2,1,3),
-(0,1,0,4,0,4,0,3,0,1,3,3,3,2,3,1,1,0,3,0,3,3,4,3,2,4,2,0,1,0,4,3,2,0,4,3,0,5,3,3,2,4,4,4,3,3,3,4,0,1,3,0,0,1,0,0,1,0,0,0,0,4,2,3,3,3,0,3,0,0,0,4,4,4,5,3,2,0,3,3,0,3,5),
-(0,2,0,3,0,0,0,3,0,1,3,0,2,0,0,0,1,0,3,1,1,3,3,0,0,3,0,0,3,0,2,3,1,0,3,1,0,3,3,2,0,4,2,2,0,2,0,0,0,4,0,0,0,0,0,0,0,0,0,0,0,2,1,2,0,1,0,1,0,0,0,1,3,1,2,0,0,0,1,0,0,1,4),
-(0,3,0,3,0,5,0,1,0,2,4,3,1,3,3,2,1,1,5,2,1,0,5,1,2,0,0,0,3,3,2,2,3,2,4,3,0,0,3,3,1,3,3,0,2,5,3,4,0,3,3,0,1,2,0,2,2,0,3,2,0,2,2,3,3,3,0,2,0,1,0,3,4,4,2,5,4,0,3,0,0,3,5),
-(0,3,0,3,0,3,0,1,0,3,3,3,3,0,3,0,2,0,2,1,1,0,2,0,1,0,0,0,2,1,0,0,1,0,3,2,0,0,3,3,1,2,3,1,0,3,3,0,0,1,0,0,0,0,0,2,0,0,0,0,0,2,3,1,2,3,0,3,0,1,0,3,2,1,0,4,3,0,1,1,0,3,3),
-(0,4,0,5,0,3,0,3,0,4,5,5,4,3,5,3,4,3,5,3,3,2,5,3,4,4,4,3,4,3,4,5,5,3,4,4,3,4,4,5,4,4,4,3,4,5,5,4,2,3,4,2,3,4,0,3,3,1,4,3,2,4,3,3,5,5,0,3,0,3,0,5,5,5,5,4,4,0,4,0,1,4,4),
-(0,4,0,4,0,3,0,3,0,3,5,4,4,2,3,2,5,1,3,2,5,1,4,2,3,2,3,3,4,3,3,3,3,2,5,4,1,3,3,5,3,4,4,0,4,4,3,1,1,3,1,0,2,3,0,2,3,0,3,0,0,4,3,1,3,4,0,3,0,2,0,4,4,4,3,4,5,0,4,0,0,3,4),
-(0,3,0,3,0,3,1,2,0,3,4,4,3,3,3,0,2,2,4,3,3,1,3,3,3,1,1,0,3,1,4,3,2,3,4,4,2,4,4,4,3,4,4,3,2,4,4,3,1,3,3,1,3,3,0,4,1,0,2,2,1,4,3,2,3,3,5,4,3,3,5,4,4,3,3,0,4,0,3,2,2,4,4),
-(0,2,0,1,0,0,0,0,0,1,2,1,3,0,0,0,0,0,2,0,1,2,1,0,0,1,0,0,0,0,3,0,0,1,0,1,1,3,1,0,0,0,1,1,0,1,1,0,0,0,0,0,2,0,0,0,0,0,0,0,0,1,1,2,2,0,3,4,0,0,0,1,1,0,0,1,0,0,0,0,0,1,1),
-(0,1,0,0,0,1,0,0,0,0,4,0,4,1,4,0,3,0,4,0,3,0,4,0,3,0,3,0,4,1,5,1,4,0,0,3,0,5,0,5,2,0,1,0,0,0,2,1,4,0,1,3,0,0,3,0,0,3,1,1,4,1,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0),
-(1,4,0,5,0,3,0,2,0,3,5,4,4,3,4,3,5,3,4,3,3,0,4,3,3,3,3,3,3,2,4,4,3,1,3,4,4,5,4,4,3,4,4,1,3,5,4,3,3,3,1,2,2,3,3,1,3,1,3,3,3,5,3,3,4,5,0,3,0,3,0,3,4,3,4,4,3,0,3,0,2,4,3),
-(0,1,0,4,0,0,0,0,0,1,4,0,4,1,4,2,4,0,3,0,1,0,1,0,0,0,0,0,2,0,3,1,1,1,0,3,0,0,0,1,2,1,0,0,1,1,1,1,0,1,0,0,0,1,0,0,3,0,0,0,0,3,2,0,2,2,0,1,0,0,0,2,3,2,3,3,0,0,0,0,2,1,0),
-(0,5,1,5,0,3,0,3,0,5,4,4,5,1,5,3,3,0,4,3,4,3,5,3,4,3,3,2,4,3,4,3,3,0,3,3,1,4,4,3,4,4,4,3,4,5,5,3,2,3,1,1,3,3,1,3,1,1,3,3,2,4,5,3,3,5,0,4,0,3,0,4,4,3,5,3,3,0,3,4,0,4,3),
-(0,5,0,5,0,3,0,2,0,4,4,3,5,2,4,3,3,3,4,4,4,3,5,3,5,3,3,1,4,0,4,3,3,0,3,3,0,4,4,4,4,5,4,3,3,5,5,3,2,3,1,2,3,2,0,1,0,0,3,2,2,4,4,3,1,5,0,4,0,3,0,4,3,1,3,2,1,0,3,3,0,3,3),
-(0,4,0,5,0,5,0,4,0,4,5,5,5,3,4,3,3,2,5,4,4,3,5,3,5,3,4,0,4,3,4,4,3,2,4,4,3,4,5,4,4,5,5,0,3,5,5,4,1,3,3,2,3,3,1,3,1,0,4,3,1,4,4,3,4,5,0,4,0,2,0,4,3,4,4,3,3,0,4,0,0,5,5),
-(0,4,0,4,0,5,0,1,1,3,3,4,4,3,4,1,3,0,5,1,3,0,3,1,3,1,1,0,3,0,3,3,4,0,4,3,0,4,4,4,3,4,4,0,3,5,4,1,0,3,0,0,2,3,0,3,1,0,3,1,0,3,2,1,3,5,0,3,0,1,0,3,2,3,3,4,4,0,2,2,0,4,4),
-(2,4,0,5,0,4,0,3,0,4,5,5,4,3,5,3,5,3,5,3,5,2,5,3,4,3,3,4,3,4,5,3,2,1,5,4,3,2,3,4,5,3,4,1,2,5,4,3,0,3,3,0,3,2,0,2,3,0,4,1,0,3,4,3,3,5,0,3,0,1,0,4,5,5,5,4,3,0,4,2,0,3,5),
-(0,5,0,4,0,4,0,2,0,5,4,3,4,3,4,3,3,3,4,3,4,2,5,3,5,3,4,1,4,3,4,4,4,0,3,5,0,4,4,4,4,5,3,1,3,4,5,3,3,3,3,3,3,3,0,2,2,0,3,3,2,4,3,3,3,5,3,4,1,3,3,5,3,2,0,0,0,0,4,3,1,3,3),
-(0,1,0,3,0,3,0,1,0,1,3,3,3,2,3,3,3,0,3,0,0,0,3,1,3,0,0,0,2,2,2,3,0,0,3,2,0,1,2,4,1,3,3,0,0,3,3,3,0,1,0,0,2,1,0,0,3,0,3,1,0,3,0,0,1,3,0,2,0,1,0,3,3,1,3,3,0,0,1,1,0,3,3),
-(0,2,0,3,0,2,1,4,0,2,2,3,1,1,3,1,1,0,2,0,3,1,2,3,1,3,0,0,1,0,4,3,2,3,3,3,1,4,2,3,3,3,3,1,0,3,1,4,0,1,1,0,1,2,0,1,1,0,1,1,0,3,1,3,2,2,0,1,0,0,0,2,3,3,3,1,0,0,0,0,0,2,3),
-(0,5,0,4,0,5,0,2,0,4,5,5,3,3,4,3,3,1,5,4,4,2,4,4,4,3,4,2,4,3,5,5,4,3,3,4,3,3,5,5,4,5,5,1,3,4,5,3,1,4,3,1,3,3,0,3,3,1,4,3,1,4,5,3,3,5,0,4,0,3,0,5,3,3,1,4,3,0,4,0,1,5,3),
-(0,5,0,5,0,4,0,2,0,4,4,3,4,3,3,3,3,3,5,4,4,4,4,4,4,5,3,3,5,2,4,4,4,3,4,4,3,3,4,4,5,5,3,3,4,3,4,3,3,4,3,3,3,3,1,2,2,1,4,3,3,5,4,4,3,4,0,4,0,3,0,4,4,4,4,4,1,0,4,2,0,2,4),
-(0,4,0,4,0,3,0,1,0,3,5,2,3,0,3,0,2,1,4,2,3,3,4,1,4,3,3,2,4,1,3,3,3,0,3,3,0,0,3,3,3,5,3,3,3,3,3,2,0,2,0,0,2,0,0,2,0,0,1,0,0,3,1,2,2,3,0,3,0,2,0,4,4,3,3,4,1,0,3,0,0,2,4),
-(0,0,0,4,0,0,0,0,0,0,1,0,1,0,2,0,0,0,0,0,1,0,2,0,1,0,0,0,0,0,3,1,3,0,3,2,0,0,0,1,0,3,2,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,4,0,2,0,0,0,0,0,0,2),
-(0,2,1,3,0,2,0,2,0,3,3,3,3,1,3,1,3,3,3,3,3,3,4,2,2,1,2,1,4,0,4,3,1,3,3,3,2,4,3,5,4,3,3,3,3,3,3,3,0,1,3,0,2,0,0,1,0,0,1,0,0,4,2,0,2,3,0,3,3,0,3,3,4,2,3,1,4,0,1,2,0,2,3),
-(0,3,0,3,0,1,0,3,0,2,3,3,3,0,3,1,2,0,3,3,2,3,3,2,3,2,3,1,3,0,4,3,2,0,3,3,1,4,3,3,2,3,4,3,1,3,3,1,1,0,1,1,0,1,0,1,0,1,0,0,0,4,1,1,0,3,0,3,1,0,2,3,3,3,3,3,1,0,0,2,0,3,3),
-(0,0,0,0,0,0,0,0,0,0,3,0,2,0,3,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,3,0,3,0,3,1,0,1,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,0,2,0,2,3,0,0,0,0,0,0,0,0,3),
-(0,2,0,3,1,3,0,3,0,2,3,3,3,1,3,1,3,1,3,1,3,3,3,1,3,0,2,3,1,1,4,3,3,2,3,3,1,2,2,4,1,3,3,0,1,4,2,3,0,1,3,0,3,0,0,1,3,0,2,0,0,3,3,2,1,3,0,3,0,2,0,3,4,4,4,3,1,0,3,0,0,3,3),
-(0,2,0,1,0,2,0,0,0,1,3,2,2,1,3,0,1,1,3,0,3,2,3,1,2,0,2,0,1,1,3,3,3,0,3,3,1,1,2,3,2,3,3,1,2,3,2,0,0,1,0,0,0,0,0,0,3,0,1,0,0,2,1,2,1,3,0,3,0,0,0,3,4,4,4,3,2,0,2,0,0,2,4),
-(0,0,0,1,0,1,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,0,0,2,2,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,1,3,1,0,0,0,0,0,0,0,3),
-(0,3,0,3,0,2,0,3,0,3,3,3,2,3,2,2,2,0,3,1,3,3,3,2,3,3,0,0,3,0,3,2,2,0,2,3,1,4,3,4,3,3,2,3,1,5,4,4,0,3,1,2,1,3,0,3,1,1,2,0,2,3,1,3,1,3,0,3,0,1,0,3,3,4,4,2,1,0,2,1,0,2,4),
-(0,1,0,3,0,1,0,2,0,1,4,2,5,1,4,0,2,0,2,1,3,1,4,0,2,1,0,0,2,1,4,1,1,0,3,3,0,5,1,3,2,3,3,1,0,3,2,3,0,1,0,0,0,0,0,0,1,0,0,0,0,4,0,1,0,3,0,2,0,1,0,3,3,3,4,3,3,0,0,0,0,2,3),
-(0,0,0,1,0,0,0,0,0,0,2,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,1,0,0,1,0,0,0,0,0,3),
-(0,1,0,3,0,4,0,3,0,2,4,3,1,0,3,2,2,1,3,1,2,2,3,1,1,1,2,1,3,0,1,2,0,1,3,2,1,3,0,5,5,1,0,0,1,3,2,1,0,3,0,0,1,0,0,0,0,0,3,4,0,1,1,1,3,2,0,2,0,1,0,2,3,3,1,2,3,0,1,0,1,0,4),
-(0,0,0,1,0,3,0,3,0,2,2,1,0,0,4,0,3,0,3,1,3,0,3,0,3,0,1,0,3,0,3,1,3,0,3,3,0,0,1,2,1,1,1,0,1,2,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,2,2,1,2,0,0,2,0,0,0,0,2,3,3,3,3,0,0,0,0,1,4),
-(0,0,0,3,0,3,0,0,0,0,3,1,1,0,3,0,1,0,2,0,1,0,0,0,0,0,0,0,1,0,3,0,2,0,2,3,0,0,2,2,3,1,2,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,0,0,2,0,0,0,0,2,3),
-(2,4,0,5,0,5,0,4,0,3,4,3,3,3,4,3,3,3,4,3,4,4,5,4,5,5,5,2,3,0,5,5,4,1,5,4,3,1,5,4,3,4,4,3,3,4,3,3,0,3,2,0,2,3,0,3,0,0,3,3,0,5,3,2,3,3,0,3,0,3,0,3,4,5,4,5,3,0,4,3,0,3,4),
-(0,3,0,3,0,3,0,3,0,3,3,4,3,2,3,2,3,0,4,3,3,3,3,3,3,3,3,0,3,2,4,3,3,1,3,4,3,4,4,4,3,4,4,3,2,4,4,1,0,2,0,0,1,1,0,2,0,0,3,1,0,5,3,2,1,3,0,3,0,1,2,4,3,2,4,3,3,0,3,2,0,4,4),
-(0,3,0,3,0,1,0,0,0,1,4,3,3,2,3,1,3,1,4,2,3,2,4,2,3,4,3,0,2,2,3,3,3,0,3,3,3,0,3,4,1,3,3,0,3,4,3,3,0,1,1,0,1,0,0,0,4,0,3,0,0,3,1,2,1,3,0,4,0,1,0,4,3,3,4,3,3,0,2,0,0,3,3),
-(0,3,0,4,0,1,0,3,0,3,4,3,3,0,3,3,3,1,3,1,3,3,4,3,3,3,0,0,3,1,5,3,3,1,3,3,2,5,4,3,3,4,5,3,2,5,3,4,0,1,0,0,0,0,0,2,0,0,1,1,0,4,2,2,1,3,0,3,0,2,0,4,4,3,5,3,2,0,1,1,0,3,4),
-(0,5,0,4,0,5,0,2,0,4,4,3,3,2,3,3,3,1,4,3,4,1,5,3,4,3,4,0,4,2,4,3,4,1,5,4,0,4,4,4,4,5,4,1,3,5,4,2,1,4,1,1,3,2,0,3,1,0,3,2,1,4,3,3,3,4,0,4,0,3,0,4,4,4,3,3,3,0,4,2,0,3,4),
-(1,4,0,4,0,3,0,1,0,3,3,3,1,1,3,3,2,2,3,3,1,0,3,2,2,1,2,0,3,1,2,1,2,0,3,2,0,2,2,3,3,4,3,0,3,3,1,2,0,1,1,3,1,2,0,0,3,0,1,1,0,3,2,2,3,3,0,3,0,0,0,2,3,3,4,3,3,0,1,0,0,1,4),
-(0,4,0,4,0,4,0,0,0,3,4,4,3,1,4,2,3,2,3,3,3,1,4,3,4,0,3,0,4,2,3,3,2,2,5,4,2,1,3,4,3,4,3,1,3,3,4,2,0,2,1,0,3,3,0,0,2,0,3,1,0,4,4,3,4,3,0,4,0,1,0,2,4,4,4,4,4,0,3,2,0,3,3),
-(0,0,0,1,0,4,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,3,2,0,0,1,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,2),
-(0,2,0,3,0,4,0,4,0,1,3,3,3,0,4,0,2,1,2,1,1,1,2,0,3,1,1,0,1,0,3,1,0,0,3,3,2,0,1,1,0,0,0,0,0,1,0,2,0,2,2,0,3,1,0,0,1,0,1,1,0,1,2,0,3,0,0,0,0,1,0,0,3,3,4,3,1,0,1,0,3,0,2),
-(0,0,0,3,0,5,0,0,0,0,1,0,2,0,3,1,0,1,3,0,0,0,2,0,0,0,1,0,0,0,1,1,0,0,4,0,0,0,2,3,0,1,4,1,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,1,0,0,0,0,0,0,0,2,0,0,3,0,0,0,0,0,3),
-(0,2,0,5,0,5,0,1,0,2,4,3,3,2,5,1,3,2,3,3,3,0,4,1,2,0,3,0,4,0,2,2,1,1,5,3,0,0,1,4,2,3,2,0,3,3,3,2,0,2,4,1,1,2,0,1,1,0,3,1,0,1,3,1,2,3,0,2,0,0,0,1,3,5,4,4,4,0,3,0,0,1,3),
-(0,4,0,5,0,4,0,4,0,4,5,4,3,3,4,3,3,3,4,3,4,4,5,3,4,5,4,2,4,2,3,4,3,1,4,4,1,3,5,4,4,5,5,4,4,5,5,5,2,3,3,1,4,3,1,3,3,0,3,3,1,4,3,4,4,4,0,3,0,4,0,3,3,4,4,5,0,0,4,3,0,4,5),
-(0,4,0,4,0,3,0,3,0,3,4,4,4,3,3,2,4,3,4,3,4,3,5,3,4,3,2,1,4,2,4,4,3,1,3,4,2,4,5,5,3,4,5,4,1,5,4,3,0,3,2,2,3,2,1,3,1,0,3,3,3,5,3,3,3,5,4,4,2,3,3,4,3,3,3,2,1,0,3,2,1,4,3),
-(0,4,0,5,0,4,0,3,0,3,5,5,3,2,4,3,4,0,5,4,4,1,4,4,4,3,3,3,4,3,5,5,2,3,3,4,1,2,5,5,3,5,5,2,3,5,5,4,0,3,2,0,3,3,1,1,5,1,4,1,0,4,3,2,3,5,0,4,0,3,0,5,4,3,4,3,0,0,4,1,0,4,4),
-(1,3,0,4,0,2,0,2,0,2,5,5,3,3,3,3,3,0,4,2,3,4,4,4,3,4,0,0,3,4,5,4,3,3,3,3,2,5,5,4,5,5,5,4,3,5,5,5,1,3,1,0,1,0,0,3,2,0,4,2,0,5,2,3,2,4,1,3,0,3,0,4,5,4,5,4,3,0,4,2,0,5,4),
-(0,3,0,4,0,5,0,3,0,3,4,4,3,2,3,2,3,3,3,3,3,2,4,3,3,2,2,0,3,3,3,3,3,1,3,3,3,0,4,4,3,4,4,1,1,4,4,2,0,3,1,0,1,1,0,4,1,0,2,3,1,3,3,1,3,4,0,3,0,1,0,3,1,3,0,0,1,0,2,0,0,4,4),
-(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0),
-(0,3,0,3,0,2,0,3,0,1,5,4,3,3,3,1,4,2,1,2,3,4,4,2,4,4,5,0,3,1,4,3,4,0,4,3,3,3,2,3,2,5,3,4,3,2,2,3,0,0,3,0,2,1,0,1,2,0,0,0,0,2,1,1,3,1,0,2,0,4,0,3,4,4,4,5,2,0,2,0,0,1,3),
-(0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,1,1,0,0,1,1,0,0,0,4,2,1,1,0,1,0,3,2,0,0,3,1,1,1,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,0,1,0,0,0,2,0,0,0,1,4,0,4,2,1,0,0,0,0,0,1),
-(0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,0,1,0,0,0,0,0,0,1,0,1,0,0,0,0,3,1,0,0,0,2,0,2,1,0,0,1,2,1,0,1,1,0,0,3,0,0,0,0,0,0,0,0,0,0,0,1,3,1,0,0,0,0,0,1,0,0,2,1,0,0,0,0,0,0,0,0,2),
-(0,4,0,4,0,4,0,3,0,4,4,3,4,2,4,3,2,0,4,4,4,3,5,3,5,3,3,2,4,2,4,3,4,3,1,4,0,2,3,4,4,4,3,3,3,4,4,4,3,4,1,3,4,3,2,1,2,1,3,3,3,4,4,3,3,5,0,4,0,3,0,4,3,3,3,2,1,0,3,0,0,3,3),
-(0,4,0,3,0,3,0,3,0,3,5,5,3,3,3,3,4,3,4,3,3,3,4,4,4,3,3,3,3,4,3,5,3,3,1,3,2,4,5,5,5,5,4,3,4,5,5,3,2,2,3,3,3,3,2,3,3,1,2,3,2,4,3,3,3,4,0,4,0,2,0,4,3,2,2,1,2,0,3,0,0,4,1),
-)
-
-class JapaneseContextAnalysis(object):
-    NUM_OF_CATEGORY = 6
-    DONT_KNOW = -1
-    ENOUGH_REL_THRESHOLD = 100
-    MAX_REL_THRESHOLD = 1000
-    MINIMUM_DATA_THRESHOLD = 4
-
-    def __init__(self):
-        self._total_rel = None
-        self._rel_sample = None
-        self._need_to_skip_char_num = None
-        self._last_char_order = None
-        self._done = None
-        self.reset()
-
-    def reset(self):
-        self._total_rel = 0  # total sequence received
-        # category counters, each integer counts sequence in its category
-        self._rel_sample = [0] * self.NUM_OF_CATEGORY
-        # if last byte in current buffer is not the last byte of a character,
-        # we need to know how many bytes to skip in next buffer
-        self._need_to_skip_char_num = 0
-        self._last_char_order = -1  # The order of previous char
-        # If this flag is set to True, detection is done and conclusion has
-        # been made
-        self._done = False
-
-    def feed(self, byte_str, num_bytes):
-        if self._done:
-            return
-
-        # The buffer we got is byte oriented, and a character may span in more than one
-        # buffers. In case the last one or two byte in last buffer is not
-        # complete, we record how many byte needed to complete that character
-        # and skip these bytes here.  We can choose to record those bytes as
-        # well and analyse the character once it is complete, but since a
-        # character will not make much difference, by simply skipping
-        # this character will simply our logic and improve performance.
-        i = self._need_to_skip_char_num
-        while i < num_bytes:
-            order, char_len = self.get_order(byte_str[i:i + 2])
-            i += char_len
-            if i > num_bytes:
-                self._need_to_skip_char_num = i - num_bytes
-                self._last_char_order = -1
-            else:
-                if (order != -1) and (self._last_char_order != -1):
-                    self._total_rel += 1
-                    if self._total_rel > self.MAX_REL_THRESHOLD:
-                        self._done = True
-                        break
-                    self._rel_sample[jp2CharContext[self._last_char_order][order]] += 1
-                self._last_char_order = order
-
-    def got_enough_data(self):
-        return self._total_rel > self.ENOUGH_REL_THRESHOLD
-
-    def get_confidence(self):
-        # This is just one way to calculate confidence. It works well for me.
-        if self._total_rel > self.MINIMUM_DATA_THRESHOLD:
-            return (self._total_rel - self._rel_sample[0]) / self._total_rel
-        else:
-            return self.DONT_KNOW
-
-    def get_order(self, byte_str):
-        return -1, 1
-
-class SJISContextAnalysis(JapaneseContextAnalysis):
-    def __init__(self):
-        super(SJISContextAnalysis, self).__init__()
-        self._charset_name = "SHIFT_JIS"
-
-    @property
-    def charset_name(self):
-        return self._charset_name
-
-    def get_order(self, byte_str):
-        if not byte_str:
-            return -1, 1
-        # find out current char's byte length
-        first_char = byte_str[0]
-        if (0x81 <= first_char <= 0x9F) or (0xE0 <= first_char <= 0xFC):
-            char_len = 2
-            if (first_char == 0x87) or (0xFA <= first_char <= 0xFC):
-                self._charset_name = "CP932"
-        else:
-            char_len = 1
-
-        # return its order if it is hiragana
-        if len(byte_str) > 1:
-            second_char = byte_str[1]
-            if (first_char == 202) and (0x9F <= second_char <= 0xF1):
-                return second_char - 0x9F, char_len
-
-        return -1, char_len
-
-class EUCJPContextAnalysis(JapaneseContextAnalysis):
-    def get_order(self, byte_str):
-        if not byte_str:
-            return -1, 1
-        # find out current char's byte length
-        first_char = byte_str[0]
-        if (first_char == 0x8E) or (0xA1 <= first_char <= 0xFE):
-            char_len = 2
-        elif first_char == 0x8F:
-            char_len = 3
-        else:
-            char_len = 1
-
-        # return its order if it is hiragana
-        if len(byte_str) > 1:
-            second_char = byte_str[1]
-            if (first_char == 0xA4) and (0xA1 <= second_char <= 0xF3):
-                return second_char - 0xA1, char_len
-
-        return -1, char_len
-
-
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/langbulgarianmodel.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/langbulgarianmodel.py
deleted file mode 100644
index 2aa4fb2..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/langbulgarianmodel.py
+++ /dev/null
@@ -1,228 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-# 255: Control characters that usually does not exist in any text
-# 254: Carriage/Return
-# 253: symbol (punctuation) that does not belong to word
-# 252: 0 - 9
-
-# Character Mapping Table:
-# this table is modified base on win1251BulgarianCharToOrderMap, so
-# only number <64 is sure valid
-
-Latin5_BulgarianCharToOrderMap = (
-255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
-253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
-252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
-253, 77, 90, 99,100, 72,109,107,101, 79,185, 81,102, 76, 94, 82,  # 40
-110,186,108, 91, 74,119, 84, 96,111,187,115,253,253,253,253,253,  # 50
-253, 65, 69, 70, 66, 63, 68,112,103, 92,194,104, 95, 86, 87, 71,  # 60
-116,195, 85, 93, 97,113,196,197,198,199,200,253,253,253,253,253,  # 70
-194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,  # 80
-210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,  # 90
- 81,226,227,228,229,230,105,231,232,233,234,235,236, 45,237,238,  # a0
- 31, 32, 35, 43, 37, 44, 55, 47, 40, 59, 33, 46, 38, 36, 41, 30,  # b0
- 39, 28, 34, 51, 48, 49, 53, 50, 54, 57, 61,239, 67,240, 60, 56,  # c0
-  1, 18,  9, 20, 11,  3, 23, 15,  2, 26, 12, 10, 14,  6,  4, 13,  # d0
-  7,  8,  5, 19, 29, 25, 22, 21, 27, 24, 17, 75, 52,241, 42, 16,  # e0
- 62,242,243,244, 58,245, 98,246,247,248,249,250,251, 91,252,253,  # f0
-)
-
-win1251BulgarianCharToOrderMap = (
-255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
-253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
-252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
-253, 77, 90, 99,100, 72,109,107,101, 79,185, 81,102, 76, 94, 82,  # 40
-110,186,108, 91, 74,119, 84, 96,111,187,115,253,253,253,253,253,  # 50
-253, 65, 69, 70, 66, 63, 68,112,103, 92,194,104, 95, 86, 87, 71,  # 60
-116,195, 85, 93, 97,113,196,197,198,199,200,253,253,253,253,253,  # 70
-206,207,208,209,210,211,212,213,120,214,215,216,217,218,219,220,  # 80
-221, 78, 64, 83,121, 98,117,105,222,223,224,225,226,227,228,229,  # 90
- 88,230,231,232,233,122, 89,106,234,235,236,237,238, 45,239,240,  # a0
- 73, 80,118,114,241,242,243,244,245, 62, 58,246,247,248,249,250,  # b0
- 31, 32, 35, 43, 37, 44, 55, 47, 40, 59, 33, 46, 38, 36, 41, 30,  # c0
- 39, 28, 34, 51, 48, 49, 53, 50, 54, 57, 61,251, 67,252, 60, 56,  # d0
-  1, 18,  9, 20, 11,  3, 23, 15,  2, 26, 12, 10, 14,  6,  4, 13,  # e0
-  7,  8,  5, 19, 29, 25, 22, 21, 27, 24, 17, 75, 52,253, 42, 16,  # f0
-)
-
-# Model Table:
-# total sequences: 100%
-# first 512 sequences: 96.9392%
-# first 1024 sequences:3.0618%
-# rest  sequences:     0.2992%
-# negative sequences:  0.0020%
-BulgarianLangModel = (
-0,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,3,3,3,3,3,3,3,2,3,3,3,3,3,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,0,3,3,3,2,2,3,2,2,1,2,2,
-3,1,3,3,2,3,3,3,3,3,3,3,3,3,3,3,3,0,3,3,3,3,3,3,3,3,3,3,0,3,0,1,
-0,0,0,0,0,0,0,0,0,0,1,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,2,3,3,3,3,3,3,3,3,0,3,1,0,
-0,1,0,0,0,0,0,0,0,0,1,1,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
-3,2,2,2,3,3,3,3,3,3,3,3,3,3,3,3,3,1,3,2,3,3,3,3,3,3,3,3,0,3,0,0,
-0,0,0,0,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,2,3,3,2,3,3,3,3,3,3,3,3,3,3,3,3,1,3,2,3,3,3,3,3,3,3,3,0,3,0,0,
-0,0,0,0,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,3,3,3,2,3,2,2,1,3,3,3,3,2,2,2,1,1,2,0,1,0,1,0,0,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,3,3,3,3,2,3,2,2,3,3,1,1,2,3,3,2,3,3,3,3,2,1,2,0,2,0,3,0,0,
-0,0,0,0,0,0,0,1,0,0,2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,3,3,3,3,1,3,3,3,3,3,2,3,2,3,3,3,3,3,2,3,3,1,3,0,3,0,2,0,0,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,3,3,3,3,3,1,3,3,2,3,3,3,1,3,3,2,3,2,2,2,0,0,2,0,2,0,2,0,0,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,3,3,3,3,3,3,0,3,3,3,2,2,3,3,3,1,2,2,3,2,1,1,2,0,2,0,0,0,0,
-1,0,0,0,0,0,0,0,0,0,2,0,0,1,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,3,3,3,3,2,3,3,1,2,3,2,2,2,3,3,3,3,3,2,2,3,1,2,0,2,1,2,0,0,
-0,0,0,0,0,0,0,0,0,0,3,0,0,1,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,3,3,1,3,3,3,3,3,2,3,3,3,2,3,3,2,3,2,2,2,3,1,2,0,1,0,1,0,0,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,3,3,3,3,3,3,3,3,1,1,1,2,2,1,3,1,3,2,2,3,0,0,1,0,1,0,1,0,0,
-0,0,0,1,0,0,0,0,1,0,2,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,3,3,2,2,3,2,2,3,1,2,1,1,1,2,3,1,3,1,2,2,0,1,1,1,1,0,1,0,0,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,3,3,1,3,2,2,3,3,1,2,3,1,1,3,3,3,3,1,2,2,1,1,1,0,2,0,2,0,1,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,1,2,2,3,3,3,2,2,1,1,2,0,2,0,1,0,0,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
-3,0,1,2,1,3,3,2,3,3,3,3,3,2,3,2,1,0,3,1,2,1,2,1,2,3,2,1,0,1,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,1,1,2,3,3,3,3,3,3,3,3,3,3,3,3,0,0,3,1,3,3,2,3,3,2,2,2,0,1,0,0,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,3,3,3,3,0,3,3,3,3,3,2,1,1,2,1,3,3,0,3,1,1,1,1,3,2,0,1,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
-3,3,2,2,2,3,3,3,3,3,3,3,3,3,3,3,1,1,3,1,3,3,2,3,2,2,2,3,0,2,0,0,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,2,3,3,2,2,3,2,1,1,1,1,1,3,1,3,1,1,0,0,0,1,0,0,0,1,0,0,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,2,3,2,0,3,2,0,3,0,2,0,0,2,1,3,1,0,0,1,0,0,0,1,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,3,2,1,1,1,1,2,1,1,2,1,1,1,2,2,1,2,1,1,1,0,1,1,0,1,0,1,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,3,2,1,3,1,1,2,1,3,2,1,1,0,1,2,3,2,1,1,1,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,3,3,3,3,2,2,1,0,1,0,0,1,0,0,0,2,1,0,3,0,0,1,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,2,3,2,3,3,1,3,2,1,1,1,2,1,1,2,1,3,0,1,0,0,0,1,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,1,1,2,2,3,3,2,3,2,2,2,3,1,2,2,1,1,2,1,1,2,2,0,1,1,0,1,0,2,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,2,1,3,1,0,2,2,1,3,2,1,0,0,2,0,2,0,1,0,0,0,0,0,0,0,1,0,0,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
-3,3,3,3,3,3,1,2,0,2,3,1,2,3,2,0,1,3,1,2,1,1,1,0,0,1,0,0,2,2,2,3,
-2,2,2,2,1,2,1,1,2,2,1,1,2,0,1,1,1,0,0,1,1,0,0,1,1,0,0,0,1,1,0,1,
-3,3,3,3,3,2,1,2,2,1,2,0,2,0,1,0,1,2,1,2,1,1,0,0,0,1,0,1,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,1,
-3,3,2,3,3,1,1,3,1,0,3,2,1,0,0,0,1,2,0,2,0,1,0,0,0,1,0,1,2,1,2,2,
-1,1,1,1,1,1,1,2,2,2,1,1,1,1,1,1,1,0,1,2,1,1,1,0,0,0,0,0,1,1,0,0,
-3,1,0,1,0,2,3,2,2,2,3,2,2,2,2,2,1,0,2,1,2,1,1,1,0,1,2,1,2,2,2,1,
-1,1,2,2,2,2,1,2,1,1,0,1,2,1,2,2,2,1,1,1,0,1,1,1,1,2,0,1,0,0,0,0,
-2,3,2,3,3,0,0,2,1,0,2,1,0,0,0,0,2,3,0,2,0,0,0,0,0,1,0,0,2,0,1,2,
-2,1,2,1,2,2,1,1,1,2,1,1,1,0,1,2,2,1,1,1,1,1,0,1,1,1,0,0,1,2,0,0,
-3,3,2,2,3,0,2,3,1,1,2,0,0,0,1,0,0,2,0,2,0,0,0,1,0,1,0,1,2,0,2,2,
-1,1,1,1,2,1,0,1,2,2,2,1,1,1,1,1,1,1,0,1,1,1,0,0,0,0,0,0,1,1,0,0,
-2,3,2,3,3,0,0,3,0,1,1,0,1,0,0,0,2,2,1,2,0,0,0,0,0,0,0,0,2,0,1,2,
-2,2,1,1,1,1,1,2,2,2,1,0,2,0,1,0,1,0,0,1,0,1,0,0,1,0,0,0,0,1,0,0,
-3,3,3,3,2,2,2,2,2,0,2,1,1,1,1,2,1,2,1,1,0,2,0,1,0,1,0,0,2,0,1,2,
-1,1,1,1,1,1,1,2,2,1,1,0,2,0,1,0,2,0,0,1,1,1,0,0,2,0,0,0,1,1,0,0,
-2,3,3,3,3,1,0,0,0,0,0,0,0,0,0,0,2,0,0,1,1,0,0,0,0,0,0,1,2,0,1,2,
-2,2,2,1,1,2,1,1,2,2,2,1,2,0,1,1,1,1,1,1,0,1,1,1,1,0,0,1,1,1,0,0,
-2,3,3,3,3,0,2,2,0,2,1,0,0,0,1,1,1,2,0,2,0,0,0,3,0,0,0,0,2,0,2,2,
-1,1,1,2,1,2,1,1,2,2,2,1,2,0,1,1,1,0,1,1,1,1,0,2,1,0,0,0,1,1,0,0,
-2,3,3,3,3,0,2,1,0,0,2,0,0,0,0,0,1,2,0,2,0,0,0,0,0,0,0,0,2,0,1,2,
-1,1,1,2,1,1,1,1,2,2,2,0,1,0,1,1,1,0,0,1,1,1,0,0,1,0,0,0,0,1,0,0,
-3,3,2,2,3,0,1,0,1,0,0,0,0,0,0,0,1,1,0,3,0,0,0,0,0,0,0,0,1,0,2,2,
-1,1,1,1,1,2,1,1,2,2,1,2,2,1,0,1,1,1,1,1,0,1,0,0,1,0,0,0,1,1,0,0,
-3,1,0,1,0,2,2,2,2,3,2,1,1,1,2,3,0,0,1,0,2,1,1,0,1,1,1,1,2,1,1,1,
-1,2,2,1,2,1,2,2,1,1,0,1,2,1,2,2,1,1,1,0,0,1,1,1,2,1,0,1,0,0,0,0,
-2,1,0,1,0,3,1,2,2,2,2,1,2,2,1,1,1,0,2,1,2,2,1,1,2,1,1,0,2,1,1,1,
-1,2,2,2,2,2,2,2,1,2,0,1,1,0,2,1,1,1,1,1,0,0,1,1,1,1,0,1,0,0,0,0,
-2,1,1,1,1,2,2,2,2,1,2,2,2,1,2,2,1,1,2,1,2,3,2,2,1,1,1,1,0,1,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,2,2,3,2,0,1,2,0,1,2,1,1,0,1,0,1,2,1,2,0,0,0,1,1,0,0,0,1,0,0,2,
-1,1,0,0,1,1,0,1,1,1,1,0,2,0,1,1,1,0,0,1,1,0,0,0,0,1,0,0,0,1,0,0,
-2,0,0,0,0,1,2,2,2,2,2,2,2,1,2,1,1,1,1,1,1,1,0,1,1,1,1,1,2,1,1,1,
-1,2,2,2,2,1,1,2,1,2,1,1,1,0,2,1,2,1,1,1,0,2,1,1,1,1,0,1,0,0,0,0,
-3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,
-1,1,0,1,0,1,1,1,1,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,2,2,3,2,0,0,0,0,1,0,0,0,0,0,0,1,1,0,2,0,0,0,0,0,0,0,0,1,0,1,2,
-1,1,1,1,1,1,0,0,2,2,2,2,2,0,1,1,0,1,1,1,1,1,0,0,1,0,0,0,1,1,0,1,
-2,3,1,2,1,0,1,1,0,2,2,2,0,0,1,0,0,1,1,1,1,0,0,0,0,0,0,0,1,0,1,2,
-1,1,1,1,2,1,1,1,1,1,1,1,1,0,1,1,0,1,0,1,0,1,0,0,1,0,0,0,0,1,0,0,
-2,2,2,2,2,0,0,2,0,0,2,0,0,0,0,0,0,1,0,1,0,0,0,0,0,0,0,0,2,0,2,2,
-1,1,1,1,1,0,0,1,2,1,1,0,1,0,1,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,
-1,2,2,2,2,0,0,2,0,1,1,0,0,0,1,0,0,2,0,2,0,0,0,0,0,0,0,0,0,0,1,1,
-0,0,0,1,1,1,1,1,1,1,1,1,1,0,1,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,
-1,2,2,3,2,0,0,1,0,0,1,0,0,0,0,0,0,1,0,2,0,0,0,1,0,0,0,0,0,0,0,2,
-1,1,0,0,1,0,0,0,1,1,0,0,1,0,1,1,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,
-2,1,2,2,2,1,2,1,2,2,1,1,2,1,1,1,0,1,1,1,1,2,0,1,0,1,1,1,1,0,1,1,
-1,1,2,1,1,1,1,1,1,0,0,1,2,1,1,1,1,1,1,0,0,1,1,1,0,0,0,0,0,0,0,0,
-1,0,0,1,3,1,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,2,2,2,1,0,0,1,0,2,0,0,0,0,0,1,1,1,0,1,0,0,0,0,0,0,0,0,2,0,0,1,
-0,2,0,1,0,0,1,1,2,0,1,0,1,0,1,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,
-1,2,2,2,2,0,1,1,0,2,1,0,1,1,1,0,0,1,0,2,0,1,0,0,0,0,0,0,0,0,0,1,
-0,1,0,0,1,0,0,0,1,1,0,0,1,0,0,1,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,
-2,2,2,2,2,0,0,1,0,0,0,1,0,1,0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,1,
-0,1,0,1,1,1,0,0,1,1,1,0,1,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,
-2,0,1,0,0,1,2,1,1,1,1,1,1,2,2,1,0,0,1,0,1,0,0,0,0,1,1,1,1,0,0,0,
-1,1,2,1,1,1,1,0,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,2,1,2,1,0,0,1,0,0,0,0,0,0,0,0,1,1,0,1,0,0,0,0,0,0,0,0,0,0,0,1,
-0,0,0,0,0,0,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,0,0,1,2,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,
-0,1,1,0,1,1,1,0,0,1,0,0,1,0,1,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,
-1,0,1,0,0,1,1,1,1,1,1,1,1,1,1,1,0,0,1,0,2,0,0,2,0,1,0,0,1,0,0,1,
-1,1,0,0,1,1,0,1,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,
-1,1,1,1,1,1,1,2,0,0,0,0,0,0,2,1,0,1,1,0,0,1,1,1,0,1,0,0,0,0,0,0,
-2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,0,1,1,0,1,1,1,1,1,0,1,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
-)
-
-Latin5BulgarianModel = {
-  'char_to_order_map': Latin5_BulgarianCharToOrderMap,
-  'precedence_matrix': BulgarianLangModel,
-  'typical_positive_ratio': 0.969392,
-  'keep_english_letter': False,
-  'charset_name': "ISO-8859-5",
-  'language': 'Bulgairan',
-}
-
-Win1251BulgarianModel = {
-  'char_to_order_map': win1251BulgarianCharToOrderMap,
-  'precedence_matrix': BulgarianLangModel,
-  'typical_positive_ratio': 0.969392,
-  'keep_english_letter': False,
-  'charset_name': "windows-1251",
-  'language': 'Bulgarian',
-}
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/langcyrillicmodel.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/langcyrillicmodel.py
deleted file mode 100644
index e5f9a1f..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/langcyrillicmodel.py
+++ /dev/null
@@ -1,333 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-# KOI8-R language model
-# Character Mapping Table:
-KOI8R_char_to_order_map = (
-255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
-253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
-252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
-253,142,143,144,145,146,147,148,149,150,151,152, 74,153, 75,154,  # 40
-155,156,157,158,159,160,161,162,163,164,165,253,253,253,253,253,  # 50
-253, 71,172, 66,173, 65,174, 76,175, 64,176,177, 77, 72,178, 69,  # 60
- 67,179, 78, 73,180,181, 79,182,183,184,185,253,253,253,253,253,  # 70
-191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,  # 80
-207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,  # 90
-223,224,225, 68,226,227,228,229,230,231,232,233,234,235,236,237,  # a0
-238,239,240,241,242,243,244,245,246,247,248,249,250,251,252,253,  # b0
- 27,  3, 21, 28, 13,  2, 39, 19, 26,  4, 23, 11,  8, 12,  5,  1,  # c0
- 15, 16,  9,  7,  6, 14, 24, 10, 17, 18, 20, 25, 30, 29, 22, 54,  # d0
- 59, 37, 44, 58, 41, 48, 53, 46, 55, 42, 60, 36, 49, 38, 31, 34,  # e0
- 35, 43, 45, 32, 40, 52, 56, 33, 61, 62, 51, 57, 47, 63, 50, 70,  # f0
-)
-
-win1251_char_to_order_map = (
-255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
-253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
-252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
-253,142,143,144,145,146,147,148,149,150,151,152, 74,153, 75,154,  # 40
-155,156,157,158,159,160,161,162,163,164,165,253,253,253,253,253,  # 50
-253, 71,172, 66,173, 65,174, 76,175, 64,176,177, 77, 72,178, 69,  # 60
- 67,179, 78, 73,180,181, 79,182,183,184,185,253,253,253,253,253,  # 70
-191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,
-207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,
-223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,
-239,240,241,242,243,244,245,246, 68,247,248,249,250,251,252,253,
- 37, 44, 33, 46, 41, 48, 56, 51, 42, 60, 36, 49, 38, 31, 34, 35,
- 45, 32, 40, 52, 53, 55, 58, 50, 57, 63, 70, 62, 61, 47, 59, 43,
-  3, 21, 10, 19, 13,  2, 24, 20,  4, 23, 11,  8, 12,  5,  1, 15,
-  9,  7,  6, 14, 39, 26, 28, 22, 25, 29, 54, 18, 17, 30, 27, 16,
-)
-
-latin5_char_to_order_map = (
-255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
-253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
-252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
-253,142,143,144,145,146,147,148,149,150,151,152, 74,153, 75,154,  # 40
-155,156,157,158,159,160,161,162,163,164,165,253,253,253,253,253,  # 50
-253, 71,172, 66,173, 65,174, 76,175, 64,176,177, 77, 72,178, 69,  # 60
- 67,179, 78, 73,180,181, 79,182,183,184,185,253,253,253,253,253,  # 70
-191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,
-207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,
-223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,
- 37, 44, 33, 46, 41, 48, 56, 51, 42, 60, 36, 49, 38, 31, 34, 35,
- 45, 32, 40, 52, 53, 55, 58, 50, 57, 63, 70, 62, 61, 47, 59, 43,
-  3, 21, 10, 19, 13,  2, 24, 20,  4, 23, 11,  8, 12,  5,  1, 15,
-  9,  7,  6, 14, 39, 26, 28, 22, 25, 29, 54, 18, 17, 30, 27, 16,
-239, 68,240,241,242,243,244,245,246,247,248,249,250,251,252,255,
-)
-
-macCyrillic_char_to_order_map = (
-255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
-253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
-252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
-253,142,143,144,145,146,147,148,149,150,151,152, 74,153, 75,154,  # 40
-155,156,157,158,159,160,161,162,163,164,165,253,253,253,253,253,  # 50
-253, 71,172, 66,173, 65,174, 76,175, 64,176,177, 77, 72,178, 69,  # 60
- 67,179, 78, 73,180,181, 79,182,183,184,185,253,253,253,253,253,  # 70
- 37, 44, 33, 46, 41, 48, 56, 51, 42, 60, 36, 49, 38, 31, 34, 35,
- 45, 32, 40, 52, 53, 55, 58, 50, 57, 63, 70, 62, 61, 47, 59, 43,
-191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,
-207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,
-223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,
-239,240,241,242,243,244,245,246,247,248,249,250,251,252, 68, 16,
-  3, 21, 10, 19, 13,  2, 24, 20,  4, 23, 11,  8, 12,  5,  1, 15,
-  9,  7,  6, 14, 39, 26, 28, 22, 25, 29, 54, 18, 17, 30, 27,255,
-)
-
-IBM855_char_to_order_map = (
-255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
-253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
-252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
-253,142,143,144,145,146,147,148,149,150,151,152, 74,153, 75,154,  # 40
-155,156,157,158,159,160,161,162,163,164,165,253,253,253,253,253,  # 50
-253, 71,172, 66,173, 65,174, 76,175, 64,176,177, 77, 72,178, 69,  # 60
- 67,179, 78, 73,180,181, 79,182,183,184,185,253,253,253,253,253,  # 70
-191,192,193,194, 68,195,196,197,198,199,200,201,202,203,204,205,
-206,207,208,209,210,211,212,213,214,215,216,217, 27, 59, 54, 70,
-  3, 37, 21, 44, 28, 58, 13, 41,  2, 48, 39, 53, 19, 46,218,219,
-220,221,222,223,224, 26, 55,  4, 42,225,226,227,228, 23, 60,229,
-230,231,232,233,234,235, 11, 36,236,237,238,239,240,241,242,243,
-  8, 49, 12, 38,  5, 31,  1, 34, 15,244,245,246,247, 35, 16,248,
- 43,  9, 45,  7, 32,  6, 40, 14, 52, 24, 56, 10, 33, 17, 61,249,
-250, 18, 62, 20, 51, 25, 57, 30, 47, 29, 63, 22, 50,251,252,255,
-)
-
-IBM866_char_to_order_map = (
-255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
-253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
-252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
-253,142,143,144,145,146,147,148,149,150,151,152, 74,153, 75,154,  # 40
-155,156,157,158,159,160,161,162,163,164,165,253,253,253,253,253,  # 50
-253, 71,172, 66,173, 65,174, 76,175, 64,176,177, 77, 72,178, 69,  # 60
- 67,179, 78, 73,180,181, 79,182,183,184,185,253,253,253,253,253,  # 70
- 37, 44, 33, 46, 41, 48, 56, 51, 42, 60, 36, 49, 38, 31, 34, 35,
- 45, 32, 40, 52, 53, 55, 58, 50, 57, 63, 70, 62, 61, 47, 59, 43,
-  3, 21, 10, 19, 13,  2, 24, 20,  4, 23, 11,  8, 12,  5,  1, 15,
-191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,
-207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,
-223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,
-  9,  7,  6, 14, 39, 26, 28, 22, 25, 29, 54, 18, 17, 30, 27, 16,
-239, 68,240,241,242,243,244,245,246,247,248,249,250,251,252,255,
-)
-
-# Model Table:
-# total sequences: 100%
-# first 512 sequences: 97.6601%
-# first 1024 sequences: 2.3389%
-# rest  sequences:      0.1237%
-# negative sequences:   0.0009%
-RussianLangModel = (
-0,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,1,1,3,3,3,3,1,3,3,3,2,3,2,3,3,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,0,3,2,2,2,2,2,0,0,2,
-3,3,3,2,3,3,3,3,3,3,3,3,3,3,2,3,3,0,0,3,3,3,3,3,3,3,3,3,2,3,2,0,
-0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,2,2,3,3,3,3,3,3,3,3,3,2,3,3,0,0,3,3,3,3,3,3,3,3,2,3,3,1,0,
-0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,2,3,2,3,3,3,3,3,3,3,3,3,3,3,3,3,0,0,3,3,3,3,3,3,3,3,3,3,3,2,1,
-0,0,0,0,0,0,0,2,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,3,0,0,3,3,3,3,3,3,3,3,3,3,3,2,1,
-0,0,0,0,0,1,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,2,2,2,3,1,3,3,1,3,3,3,3,2,2,3,0,2,2,2,3,3,2,1,0,
-0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,2,3,3,3,3,3,2,2,3,2,3,3,3,2,1,2,2,0,1,2,2,2,2,2,2,0,
-0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,2,2,3,0,2,2,3,3,2,1,2,0,
-0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,1,0,0,2,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,2,3,3,1,2,3,2,2,3,2,3,3,3,3,2,2,3,0,3,2,2,3,1,1,1,0,
-0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,2,2,3,3,3,3,3,2,3,3,3,3,2,2,2,0,3,3,3,2,2,2,2,0,
-0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,3,3,2,3,2,3,3,3,3,3,3,2,3,2,2,0,1,3,2,1,2,2,1,0,
-0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,3,3,3,2,1,1,3,0,1,1,1,1,2,1,1,0,2,2,2,1,2,0,1,0,
-0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,2,3,3,2,2,2,2,1,3,2,3,2,3,2,1,2,2,0,1,1,2,1,2,1,2,0,
-0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,3,3,3,3,2,2,3,2,3,3,3,2,2,2,2,0,2,2,2,2,3,1,1,0,
-0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
-3,2,3,2,2,3,3,3,3,3,3,3,3,3,1,3,2,0,0,3,3,3,3,2,3,3,3,3,2,3,2,0,
-0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,3,3,3,3,3,2,2,3,3,0,2,1,0,3,2,3,2,3,0,0,1,2,0,0,1,0,1,2,1,1,0,
-0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,0,3,0,2,3,3,3,3,2,3,3,3,3,1,2,2,0,0,2,3,2,2,2,3,2,3,2,2,3,0,0,
-0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,2,3,0,2,3,2,3,0,1,2,3,3,2,0,2,3,0,0,2,3,2,2,0,1,3,1,3,2,2,1,0,
-0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,1,3,0,2,3,3,3,3,3,3,3,3,2,1,3,2,0,0,2,2,3,3,3,2,3,3,0,2,2,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,2,2,3,3,2,2,2,3,3,0,0,1,1,1,1,1,2,0,0,1,1,1,1,0,1,0,
-0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,2,2,3,3,3,3,3,3,3,0,3,2,3,3,2,3,2,0,2,1,0,1,1,0,1,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,2,3,3,3,2,2,2,2,3,1,3,2,3,1,1,2,1,0,2,2,2,2,1,3,1,0,
-0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
-2,2,3,3,3,3,3,1,2,2,1,3,1,0,3,0,0,3,0,0,0,1,1,0,1,2,1,0,0,0,0,0,
-0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,2,2,1,1,3,3,3,2,2,1,2,2,3,1,1,2,0,0,2,2,1,3,0,0,2,1,1,2,1,1,0,
-0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,2,3,3,3,3,1,2,2,2,1,2,1,3,3,1,1,2,1,2,1,2,2,0,2,0,0,1,1,0,1,0,
-0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,3,3,3,3,3,2,1,3,2,2,3,2,0,3,2,0,3,0,1,0,1,1,0,0,1,1,1,1,0,1,0,
-0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,2,3,3,3,2,2,2,3,3,1,2,1,2,1,0,1,0,1,1,0,1,0,0,2,1,1,1,0,1,0,
-0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,
-3,1,1,2,1,2,3,3,2,2,1,2,2,3,0,2,1,0,0,2,2,3,2,1,2,2,2,2,2,3,1,0,
-0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,1,1,0,1,1,2,2,1,1,3,0,0,1,3,1,1,1,0,0,0,1,0,1,1,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,1,3,3,3,2,0,0,0,2,1,0,1,0,2,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,0,1,0,0,2,3,2,2,2,1,2,2,2,1,2,1,0,0,1,1,1,0,2,0,1,1,1,0,0,1,1,
-1,0,0,0,0,0,1,2,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,
-2,3,3,3,3,0,0,0,0,1,0,0,0,0,3,0,1,2,1,0,0,0,0,0,0,0,1,1,0,0,1,1,
-1,0,1,0,1,2,0,0,1,1,2,1,0,1,1,1,1,0,1,1,1,1,0,1,0,0,1,0,0,1,1,0,
-2,2,3,2,2,2,3,1,2,2,2,2,2,2,2,2,1,1,1,1,1,1,1,0,1,0,1,1,1,0,2,1,
-1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,1,0,1,0,1,1,0,1,1,1,0,1,1,0,
-3,3,3,2,2,2,2,3,2,2,1,1,2,2,2,2,1,1,3,1,2,1,2,0,0,1,1,0,1,0,2,1,
-1,1,1,1,1,2,1,0,1,1,1,1,0,1,0,0,1,1,0,0,1,0,1,0,0,1,0,0,0,1,1,0,
-2,0,0,1,0,3,2,2,2,2,1,2,1,2,1,2,0,0,0,2,1,2,2,1,1,2,2,0,1,1,0,2,
-1,1,1,1,1,0,1,1,1,2,1,1,1,2,1,0,1,2,1,1,1,1,0,1,1,1,0,0,1,0,0,1,
-1,3,2,2,2,1,1,1,2,3,0,0,0,0,2,0,2,2,1,0,0,0,0,0,0,1,0,0,0,0,1,1,
-1,0,1,1,0,1,0,1,1,0,1,1,0,2,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,1,1,0,
-2,3,2,3,2,1,2,2,2,2,1,0,0,0,2,0,0,1,1,0,0,0,0,0,0,0,1,1,0,0,2,1,
-1,1,2,1,0,2,0,0,1,0,1,0,0,1,0,0,1,1,0,1,1,0,0,0,0,0,1,0,0,0,0,0,
-3,0,0,1,0,2,2,2,3,2,2,2,2,2,2,2,0,0,0,2,1,2,1,1,1,2,2,0,0,0,1,2,
-1,1,1,1,1,0,1,2,1,1,1,1,1,1,1,0,1,1,1,1,1,1,0,1,1,1,1,1,1,0,0,1,
-2,3,2,3,3,2,0,1,1,1,0,0,1,0,2,0,1,1,3,1,0,0,0,0,0,0,0,1,0,0,2,1,
-1,1,1,1,1,1,1,0,1,0,1,1,1,1,0,1,1,1,0,0,1,1,0,1,0,0,0,0,0,0,1,0,
-2,3,3,3,3,1,2,2,2,2,0,1,1,0,2,1,1,1,2,1,0,1,1,0,0,1,0,1,0,0,2,0,
-0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,3,3,3,2,0,0,1,1,2,2,1,0,0,2,0,1,1,3,0,0,1,0,0,0,0,0,1,0,1,2,1,
-1,1,2,0,1,1,1,0,1,0,1,1,0,1,0,1,1,1,1,0,1,0,0,0,0,0,0,1,0,1,1,0,
-1,3,2,3,2,1,0,0,2,2,2,0,1,0,2,0,1,1,1,0,1,0,0,0,3,0,1,1,0,0,2,1,
-1,1,1,0,1,1,0,0,0,0,1,1,0,1,0,0,2,1,1,0,1,0,0,0,1,0,1,0,0,1,1,0,
-3,1,2,1,1,2,2,2,2,2,2,1,2,2,1,1,0,0,0,2,2,2,0,0,0,1,2,1,0,1,0,1,
-2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,2,1,1,1,0,1,0,1,1,0,1,1,1,0,0,1,
-3,0,0,0,0,2,0,1,1,1,1,1,1,1,0,1,0,0,0,1,1,1,0,1,0,1,1,0,0,1,0,1,
-1,1,0,0,1,0,0,0,1,0,1,1,0,0,1,0,1,0,1,0,0,0,0,1,0,0,0,1,0,0,0,1,
-1,3,3,2,2,0,0,0,2,2,0,0,0,1,2,0,1,1,2,0,0,0,0,0,0,0,0,1,0,0,2,1,
-0,1,1,0,0,1,1,0,0,0,1,1,0,1,1,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,1,0,
-2,3,2,3,2,0,0,0,0,1,1,0,0,0,2,0,2,0,2,0,0,0,0,0,1,0,0,1,0,0,1,1,
-1,1,2,0,1,2,1,0,1,1,2,1,1,1,1,1,2,1,1,0,1,0,0,1,1,1,1,1,0,1,1,0,
-1,3,2,2,2,1,0,0,2,2,1,0,1,2,2,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,1,1,
-0,0,1,1,0,1,1,0,0,1,1,0,1,1,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,
-1,0,0,1,0,2,3,1,2,2,2,2,2,2,1,1,0,0,0,1,0,1,0,2,1,1,1,0,0,0,0,1,
-1,1,0,1,1,0,1,1,1,1,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,
-2,0,2,0,0,1,0,3,2,1,2,1,2,2,0,1,0,0,0,2,1,0,0,2,1,1,1,1,0,2,0,2,
-2,1,1,1,1,1,1,1,1,1,1,1,1,2,1,0,1,1,1,1,0,0,0,1,1,1,1,0,1,0,0,1,
-1,2,2,2,2,1,0,0,1,0,0,0,0,0,2,0,1,1,1,1,0,0,0,0,1,0,1,2,0,0,2,0,
-1,0,1,1,1,2,1,0,1,0,1,1,0,0,1,0,1,1,1,0,1,0,0,0,1,0,0,1,0,1,1,0,
-2,1,2,2,2,0,3,0,1,1,0,0,0,0,2,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
-0,0,0,1,1,1,0,0,1,0,1,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,
-1,2,2,3,2,2,0,0,1,1,2,0,1,2,1,0,1,0,1,0,0,1,0,0,0,0,0,0,0,0,0,1,
-0,1,1,0,0,1,1,0,0,1,1,0,0,1,1,0,1,1,0,0,1,0,0,0,0,0,0,0,0,1,1,0,
-2,2,1,1,2,1,2,2,2,2,2,1,2,2,0,1,0,0,0,1,2,2,2,1,2,1,1,1,1,1,2,1,
-1,1,1,1,1,1,1,1,1,1,0,0,1,1,1,0,1,1,1,0,0,0,0,1,1,1,0,1,1,0,0,1,
-1,2,2,2,2,0,1,0,2,2,0,0,0,0,2,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,2,0,
-0,0,1,0,0,1,0,0,0,0,1,0,1,1,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,
-0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,2,2,2,2,0,0,0,2,2,2,0,1,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,
-0,1,1,0,0,1,1,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,2,2,2,2,0,0,0,0,1,0,0,1,1,2,0,0,0,0,1,0,1,0,0,1,0,0,2,0,0,0,1,
-0,0,1,0,0,1,0,0,0,1,1,0,0,0,0,0,1,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,
-1,2,2,2,1,1,2,0,2,1,1,1,1,0,2,2,0,0,0,0,0,0,0,0,0,1,1,0,0,0,1,1,
-0,0,1,0,1,1,0,0,0,0,1,0,0,0,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,
-1,0,2,1,2,0,0,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,
-0,0,1,0,1,1,0,0,0,0,1,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,
-1,0,0,0,0,2,0,1,2,1,0,1,1,1,0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,0,0,1,
-0,0,0,0,0,1,0,0,1,1,0,0,1,1,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,
-2,2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
-1,0,0,0,1,0,0,0,1,1,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,1,0,0,0,0,0,
-2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
-1,1,1,0,1,0,1,0,0,1,1,1,1,0,0,0,1,0,0,0,0,1,0,0,0,1,0,1,0,0,0,0,
-1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
-1,1,0,1,1,0,1,0,1,0,0,0,0,1,1,0,1,1,0,0,0,0,0,1,0,1,1,0,1,0,0,0,
-0,1,1,1,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,1,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,
-)
-
-Koi8rModel = {
-  'char_to_order_map': KOI8R_char_to_order_map,
-  'precedence_matrix': RussianLangModel,
-  'typical_positive_ratio': 0.976601,
-  'keep_english_letter': False,
-  'charset_name': "KOI8-R",
-  'language': 'Russian',
-}
-
-Win1251CyrillicModel = {
-  'char_to_order_map': win1251_char_to_order_map,
-  'precedence_matrix': RussianLangModel,
-  'typical_positive_ratio': 0.976601,
-  'keep_english_letter': False,
-  'charset_name': "windows-1251",
-  'language': 'Russian',
-}
-
-Latin5CyrillicModel = {
-  'char_to_order_map': latin5_char_to_order_map,
-  'precedence_matrix': RussianLangModel,
-  'typical_positive_ratio': 0.976601,
-  'keep_english_letter': False,
-  'charset_name': "ISO-8859-5",
-  'language': 'Russian',
-}
-
-MacCyrillicModel = {
-  'char_to_order_map': macCyrillic_char_to_order_map,
-  'precedence_matrix': RussianLangModel,
-  'typical_positive_ratio': 0.976601,
-  'keep_english_letter': False,
-  'charset_name': "MacCyrillic",
-  'language': 'Russian',
-}
-
-Ibm866Model = {
-  'char_to_order_map': IBM866_char_to_order_map,
-  'precedence_matrix': RussianLangModel,
-  'typical_positive_ratio': 0.976601,
-  'keep_english_letter': False,
-  'charset_name': "IBM866",
-  'language': 'Russian',
-}
-
-Ibm855Model = {
-  'char_to_order_map': IBM855_char_to_order_map,
-  'precedence_matrix': RussianLangModel,
-  'typical_positive_ratio': 0.976601,
-  'keep_english_letter': False,
-  'charset_name': "IBM855",
-  'language': 'Russian',
-}
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/langgreekmodel.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/langgreekmodel.py
deleted file mode 100644
index 5332221..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/langgreekmodel.py
+++ /dev/null
@@ -1,225 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-# 255: Control characters that usually does not exist in any text
-# 254: Carriage/Return
-# 253: symbol (punctuation) that does not belong to word
-# 252: 0 - 9
-
-# Character Mapping Table:
-Latin7_char_to_order_map = (
-255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
-253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
-252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
-253, 82,100,104, 94, 98,101,116,102,111,187,117, 92, 88,113, 85,  # 40
- 79,118,105, 83, 67,114,119, 95, 99,109,188,253,253,253,253,253,  # 50
-253, 72, 70, 80, 81, 60, 96, 93, 89, 68,120, 97, 77, 86, 69, 55,  # 60
- 78,115, 65, 66, 58, 76,106,103, 87,107,112,253,253,253,253,253,  # 70
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 80
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 90
-253,233, 90,253,253,253,253,253,253,253,253,253,253, 74,253,253,  # a0
-253,253,253,253,247,248, 61, 36, 46, 71, 73,253, 54,253,108,123,  # b0
-110, 31, 51, 43, 41, 34, 91, 40, 52, 47, 44, 53, 38, 49, 59, 39,  # c0
- 35, 48,250, 37, 33, 45, 56, 50, 84, 57,120,121, 17, 18, 22, 15,  # d0
-124,  1, 29, 20, 21,  3, 32, 13, 25,  5, 11, 16, 10,  6, 30,  4,  # e0
-  9,  8, 14,  7,  2, 12, 28, 23, 42, 24, 64, 75, 19, 26, 27,253,  # f0
-)
-
-win1253_char_to_order_map = (
-255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
-253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
-252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
-253, 82,100,104, 94, 98,101,116,102,111,187,117, 92, 88,113, 85,  # 40
- 79,118,105, 83, 67,114,119, 95, 99,109,188,253,253,253,253,253,  # 50
-253, 72, 70, 80, 81, 60, 96, 93, 89, 68,120, 97, 77, 86, 69, 55,  # 60
- 78,115, 65, 66, 58, 76,106,103, 87,107,112,253,253,253,253,253,  # 70
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 80
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 90
-253,233, 61,253,253,253,253,253,253,253,253,253,253, 74,253,253,  # a0
-253,253,253,253,247,253,253, 36, 46, 71, 73,253, 54,253,108,123,  # b0
-110, 31, 51, 43, 41, 34, 91, 40, 52, 47, 44, 53, 38, 49, 59, 39,  # c0
- 35, 48,250, 37, 33, 45, 56, 50, 84, 57,120,121, 17, 18, 22, 15,  # d0
-124,  1, 29, 20, 21,  3, 32, 13, 25,  5, 11, 16, 10,  6, 30,  4,  # e0
-  9,  8, 14,  7,  2, 12, 28, 23, 42, 24, 64, 75, 19, 26, 27,253,  # f0
-)
-
-# Model Table:
-# total sequences: 100%
-# first 512 sequences: 98.2851%
-# first 1024 sequences:1.7001%
-# rest  sequences:     0.0359%
-# negative sequences:  0.0148%
-GreekLangModel = (
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,3,2,2,3,3,3,3,3,3,3,3,1,3,3,3,0,2,2,3,3,0,3,0,3,2,0,3,3,3,0,
-3,0,0,0,2,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,3,3,3,3,0,3,3,0,3,2,3,3,0,3,2,3,3,3,0,0,3,0,3,0,3,3,2,0,0,0,
-2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,
-0,2,3,2,2,3,3,3,3,3,3,3,3,0,3,3,3,3,0,2,3,3,0,3,3,3,3,2,3,3,3,0,
-2,0,0,0,2,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,2,3,3,2,3,3,3,3,3,3,3,3,3,3,3,3,0,2,1,3,3,3,3,2,3,3,2,3,3,2,0,
-0,0,0,0,2,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,3,3,3,0,3,3,3,3,3,3,0,3,3,0,3,3,3,3,3,3,3,3,3,3,0,3,2,3,3,0,
-2,0,1,0,2,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,
-0,3,3,3,3,3,2,3,0,0,0,0,3,3,0,3,1,3,3,3,0,3,3,0,3,3,3,3,0,0,0,0,
-2,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,3,3,3,3,0,3,0,3,3,3,3,3,0,3,2,2,2,3,0,2,3,3,3,3,3,2,3,3,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,3,3,3,3,3,2,2,2,3,3,3,3,0,3,1,3,3,3,3,2,3,3,3,3,3,3,3,2,2,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,3,3,3,3,2,0,3,0,0,0,3,3,2,3,3,3,3,3,0,0,3,2,3,0,2,3,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,0,3,3,3,3,0,0,3,3,0,2,3,0,3,0,3,3,3,0,0,3,0,3,0,2,2,3,3,0,0,
-0,0,1,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,3,3,3,3,2,0,3,2,3,3,3,3,0,3,3,3,3,3,0,3,3,2,3,2,3,3,2,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,3,2,3,2,3,3,3,3,3,3,0,2,3,2,3,2,2,2,3,2,3,3,2,3,0,2,2,2,3,0,
-2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,3,0,0,0,3,3,3,2,3,3,0,0,3,0,3,0,0,0,3,2,0,3,0,3,0,0,2,0,2,0,
-0,0,0,0,2,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,3,3,3,0,3,3,3,3,3,3,0,3,3,0,3,0,0,0,3,3,0,3,3,3,0,0,1,2,3,0,
-3,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,3,3,3,3,2,0,0,3,2,2,3,3,0,3,3,3,3,3,2,1,3,0,3,2,3,3,2,1,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,3,3,0,2,3,3,3,3,3,3,0,0,3,0,3,0,0,0,3,3,0,3,2,3,0,0,3,3,3,0,
-3,0,0,0,2,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,3,3,3,0,3,3,3,3,3,3,0,0,3,0,3,0,0,0,3,2,0,3,2,3,0,0,3,2,3,0,
-2,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,3,1,2,2,3,3,3,3,3,3,0,2,3,0,3,0,0,0,3,3,0,3,0,2,0,0,2,3,1,0,
-2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,0,3,3,3,3,0,3,0,3,3,2,3,0,3,3,3,3,3,3,0,3,3,3,0,2,3,0,0,3,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,0,3,3,3,0,0,3,0,0,0,3,3,0,3,0,2,3,3,0,0,3,0,3,0,3,3,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,3,0,0,0,3,3,3,3,3,3,0,0,3,0,2,0,0,0,3,3,0,3,0,3,0,0,2,0,2,0,
-0,0,0,0,1,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,3,3,3,3,3,0,3,0,2,0,3,2,0,3,2,3,2,3,0,0,3,2,3,2,3,3,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,3,0,0,2,3,3,3,3,3,0,0,0,3,0,2,1,0,0,3,2,2,2,0,3,0,0,2,2,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,0,3,3,3,2,0,3,0,3,0,3,3,0,2,1,2,3,3,0,0,3,0,3,0,3,3,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,2,3,3,3,0,3,3,3,3,3,3,0,2,3,0,3,0,0,0,2,1,0,2,2,3,0,0,2,2,2,0,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,3,0,0,2,3,3,3,2,3,0,0,1,3,0,2,0,0,0,0,3,0,1,0,2,0,0,1,1,1,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,3,3,3,3,1,0,3,0,0,0,3,2,0,3,2,3,3,3,0,0,3,0,3,2,2,2,1,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,0,3,3,3,0,0,3,0,0,0,0,2,0,2,3,3,2,2,2,2,3,0,2,0,2,2,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,3,3,3,2,0,0,0,0,0,0,2,3,0,2,0,2,3,2,0,0,3,0,3,0,3,1,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,3,2,3,3,2,2,3,0,2,0,3,0,0,0,2,0,0,0,0,1,2,0,2,0,2,0,
-0,2,0,2,0,2,2,0,0,1,0,2,2,2,0,2,2,2,0,2,2,2,0,0,2,0,0,1,0,0,0,0,
-0,2,0,3,3,2,0,0,0,0,0,0,1,3,0,2,0,2,2,2,0,0,2,0,3,0,0,2,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,0,2,3,2,0,2,2,0,2,0,2,2,0,2,0,2,2,2,0,0,0,0,0,0,2,3,0,0,0,2,
-0,1,2,0,0,0,0,2,2,0,0,0,2,1,0,2,2,0,0,0,0,0,0,1,0,2,0,0,0,0,0,0,
-0,0,2,1,0,2,3,2,2,3,2,3,2,0,0,3,3,3,0,0,3,2,0,0,0,1,1,0,2,0,2,2,
-0,2,0,2,0,2,2,0,0,2,0,2,2,2,0,2,2,2,2,0,0,2,0,0,0,2,0,1,0,0,0,0,
-0,3,0,3,3,2,2,0,3,0,0,0,2,2,0,2,2,2,1,2,0,0,1,2,2,0,0,3,0,0,0,2,
-0,1,2,0,0,0,1,2,0,0,0,0,0,0,0,2,2,0,1,0,0,2,0,0,0,2,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,2,3,3,2,2,0,0,0,2,0,2,3,3,0,2,0,0,0,0,0,0,2,2,2,0,2,2,0,2,0,2,
-0,2,2,0,0,2,2,2,2,1,0,0,2,2,0,2,0,0,2,0,0,0,0,0,0,2,0,0,0,0,0,0,
-0,2,0,3,2,3,0,0,0,3,0,0,2,2,0,2,0,2,2,2,0,0,2,0,0,0,0,0,0,0,0,2,
-0,0,2,2,0,0,2,2,2,0,0,0,0,0,0,2,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,2,0,0,3,2,0,2,2,2,2,2,0,0,0,2,0,0,0,0,2,0,1,0,0,2,0,1,0,0,0,
-0,2,2,2,0,2,2,0,1,2,0,2,2,2,0,2,2,2,2,1,2,2,0,0,2,0,0,0,0,0,0,0,
-0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,
-0,2,0,2,0,2,2,0,0,0,0,1,2,1,0,0,2,2,0,0,2,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,3,2,3,0,0,2,0,0,0,2,2,0,2,0,0,0,1,0,0,2,0,2,0,2,2,0,0,0,0,
-0,0,2,0,0,0,0,2,2,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,
-0,2,2,3,2,2,0,0,0,0,0,0,1,3,0,2,0,2,2,0,0,0,1,0,2,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,2,0,2,0,3,2,0,2,0,0,0,0,0,0,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
-0,0,2,0,0,0,0,1,1,0,0,2,1,2,0,2,2,0,1,0,0,1,0,0,0,2,0,0,0,0,0,0,
-0,3,0,2,2,2,0,0,2,0,0,0,2,0,0,0,2,3,0,2,0,0,0,0,0,0,2,2,0,0,0,2,
-0,1,2,0,0,0,1,2,2,1,0,0,0,2,0,0,2,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,2,1,2,0,2,2,0,2,0,0,2,0,0,0,0,1,2,1,0,2,1,0,0,0,0,0,0,0,0,0,0,
-0,0,2,0,0,0,3,1,2,2,0,2,0,0,0,0,2,0,0,0,2,0,0,3,0,0,0,0,2,2,2,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,2,1,0,2,0,1,2,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,1,0,0,0,0,0,0,2,
-0,2,2,0,0,2,2,2,2,2,0,1,2,0,0,0,2,2,0,1,0,2,0,0,2,2,0,0,0,0,0,0,
-0,0,0,0,1,0,0,0,0,0,0,0,3,0,0,2,0,0,0,0,0,0,0,0,2,0,2,0,0,0,0,2,
-0,1,2,0,0,0,0,2,2,1,0,1,0,1,0,2,2,2,1,0,0,0,0,0,0,1,0,0,0,0,0,0,
-0,2,0,1,2,0,0,0,0,0,0,0,0,0,0,2,0,0,2,2,0,0,0,0,1,0,0,0,0,0,0,2,
-0,2,2,0,0,0,0,2,2,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,2,0,0,2,0,0,0,
-0,2,2,2,2,0,0,0,3,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,2,0,0,0,0,0,0,1,
-0,0,2,0,0,0,0,1,2,0,0,0,0,0,0,2,2,1,1,0,0,0,0,0,0,1,0,0,0,0,0,0,
-0,2,0,2,2,2,0,0,2,0,0,0,0,0,0,0,2,2,2,0,0,0,2,0,0,0,0,0,0,0,0,2,
-0,0,1,0,0,0,0,2,1,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,
-0,3,0,2,0,0,0,0,0,0,0,0,2,0,0,0,0,0,2,0,0,0,0,0,0,0,2,0,0,0,0,2,
-0,0,2,0,0,0,0,2,2,0,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,2,0,2,2,1,0,0,0,0,0,0,2,0,0,2,0,2,2,2,0,0,0,0,0,0,2,0,0,0,0,2,
-0,0,2,0,0,2,0,2,2,0,0,0,0,2,0,2,0,0,0,0,0,2,0,0,0,2,0,0,0,0,0,0,
-0,0,3,0,0,0,2,2,0,2,2,0,0,0,0,0,2,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,2,0,0,0,0,0,
-0,2,2,2,2,2,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,1,
-0,0,0,0,0,0,0,2,1,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,2,2,0,0,0,0,0,2,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,
-0,2,0,0,0,2,0,0,0,0,0,1,0,0,0,0,2,2,0,0,0,1,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,1,0,2,0,0,0,
-0,2,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,1,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,1,0,0,2,0,2,0,0,0,
-0,0,0,0,0,0,0,0,2,1,0,0,0,0,0,0,2,0,0,0,1,2,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-)
-
-Latin7GreekModel = {
-  'char_to_order_map': Latin7_char_to_order_map,
-  'precedence_matrix': GreekLangModel,
-  'typical_positive_ratio': 0.982851,
-  'keep_english_letter': False,
-  'charset_name': "ISO-8859-7",
-  'language': 'Greek',
-}
-
-Win1253GreekModel = {
-  'char_to_order_map': win1253_char_to_order_map,
-  'precedence_matrix': GreekLangModel,
-  'typical_positive_ratio': 0.982851,
-  'keep_english_letter': False,
-  'charset_name': "windows-1253",
-  'language': 'Greek',
-}
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/langhebrewmodel.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/langhebrewmodel.py
deleted file mode 100644
index 58f4c87..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/langhebrewmodel.py
+++ /dev/null
@@ -1,200 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Universal charset detector code.
-#
-# The Initial Developer of the Original Code is
-#          Simon Montagu
-# Portions created by the Initial Developer are Copyright (C) 2005
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#   Shy Shalom - original C code
-#   Shoshannah Forbes - original C code (?)
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-# 255: Control characters that usually does not exist in any text
-# 254: Carriage/Return
-# 253: symbol (punctuation) that does not belong to word
-# 252: 0 - 9
-
-# Windows-1255 language model
-# Character Mapping Table:
-WIN1255_CHAR_TO_ORDER_MAP = (
-255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
-253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
-252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
-253, 69, 91, 79, 80, 92, 89, 97, 90, 68,111,112, 82, 73, 95, 85,  # 40
- 78,121, 86, 71, 67,102,107, 84,114,103,115,253,253,253,253,253,  # 50
-253, 50, 74, 60, 61, 42, 76, 70, 64, 53,105, 93, 56, 65, 54, 49,  # 60
- 66,110, 51, 43, 44, 63, 81, 77, 98, 75,108,253,253,253,253,253,  # 70
-124,202,203,204,205, 40, 58,206,207,208,209,210,211,212,213,214,
-215, 83, 52, 47, 46, 72, 32, 94,216,113,217,109,218,219,220,221,
- 34,116,222,118,100,223,224,117,119,104,125,225,226, 87, 99,227,
-106,122,123,228, 55,229,230,101,231,232,120,233, 48, 39, 57,234,
- 30, 59, 41, 88, 33, 37, 36, 31, 29, 35,235, 62, 28,236,126,237,
-238, 38, 45,239,240,241,242,243,127,244,245,246,247,248,249,250,
-  9,  8, 20, 16,  3,  2, 24, 14, 22,  1, 25, 15,  4, 11,  6, 23,
- 12, 19, 13, 26, 18, 27, 21, 17,  7, 10,  5,251,252,128, 96,253,
-)
-
-# Model Table:
-# total sequences: 100%
-# first 512 sequences: 98.4004%
-# first 1024 sequences: 1.5981%
-# rest  sequences:      0.087%
-# negative sequences:   0.0015%
-HEBREW_LANG_MODEL = (
-0,3,3,3,3,3,3,3,3,3,3,2,3,3,3,3,3,3,3,3,3,3,3,2,3,2,1,2,0,1,0,0,
-3,0,3,1,0,0,1,3,2,0,1,1,2,0,2,2,2,1,1,1,1,2,1,1,1,2,0,0,2,2,0,1,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,2,2,2,
-1,2,1,2,1,2,0,0,2,0,0,0,0,0,1,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,2,2,
-1,2,1,3,1,1,0,0,2,0,0,0,1,0,1,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,1,0,1,2,2,1,3,
-1,2,1,1,2,2,0,0,2,2,0,0,0,0,1,0,1,0,0,0,1,0,0,0,0,0,0,1,0,1,1,0,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,3,2,2,2,2,3,2,
-1,2,1,2,2,2,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,3,2,3,2,2,3,2,2,2,1,2,2,2,2,
-1,2,1,1,2,2,0,1,2,0,0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,0,2,2,2,2,2,
-0,2,0,2,2,2,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,0,2,2,2,
-0,2,1,2,2,2,0,0,2,1,0,0,0,0,1,0,1,0,0,0,0,0,0,2,0,0,0,0,0,0,1,0,
-3,3,3,3,3,3,3,3,3,3,3,2,3,3,3,3,3,3,3,3,3,3,3,3,3,2,1,2,3,2,2,2,
-1,2,1,2,2,2,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,1,0,
-3,3,3,3,3,3,3,3,3,2,3,3,3,2,3,3,3,3,3,3,3,3,3,3,3,3,3,1,0,2,0,2,
-0,2,1,2,2,2,0,0,1,2,0,0,0,0,1,0,1,0,0,0,0,0,0,1,0,0,0,2,0,0,1,0,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,2,3,2,2,3,2,1,2,1,1,1,
-0,1,1,1,1,1,3,0,1,0,0,0,0,2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
-3,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,0,1,1,0,0,1,0,0,1,0,0,0,0,
-0,0,1,0,0,0,0,0,2,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,2,2,2,2,2,2,
-0,2,0,1,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
-3,3,3,3,3,3,3,3,3,2,3,3,3,2,1,2,3,3,2,3,3,3,3,2,3,2,1,2,0,2,1,2,
-0,2,0,2,2,2,0,0,1,2,0,0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,1,0,
-3,3,3,3,3,3,3,3,3,2,3,3,3,1,2,2,3,3,2,3,2,3,2,2,3,1,2,2,0,2,2,2,
-0,2,1,2,2,2,0,0,1,2,0,0,0,0,1,0,0,0,0,0,1,0,0,1,0,0,0,1,0,0,1,0,
-3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,3,3,2,3,3,2,2,2,3,3,3,3,1,3,2,2,2,
-0,2,0,1,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,2,3,3,3,2,3,2,2,2,1,2,2,0,2,2,2,2,
-0,2,0,2,2,2,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
-3,3,3,3,3,3,3,3,3,3,3,2,3,3,3,1,3,2,3,3,2,3,3,2,2,1,2,2,2,2,2,2,
-0,2,1,2,1,2,0,0,1,0,0,0,0,0,1,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,1,0,
-3,3,3,3,3,3,2,3,2,3,3,2,3,3,3,3,2,3,2,3,3,3,3,3,2,2,2,2,2,2,2,1,
-0,2,0,1,2,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,
-3,3,3,3,3,3,3,3,3,2,1,2,3,3,3,3,3,3,3,2,3,2,3,2,1,2,3,0,2,1,2,2,
-0,2,1,1,2,1,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,2,0,
-3,3,3,3,3,3,3,3,3,2,3,3,3,3,2,1,3,1,2,2,2,1,2,3,3,1,2,1,2,2,2,2,
-0,1,1,1,1,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,2,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,3,3,0,2,3,3,3,1,3,3,3,1,2,2,2,2,1,1,2,2,2,2,2,2,
-0,2,0,1,1,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,
-3,3,3,3,3,3,2,3,3,3,2,2,3,3,3,2,1,2,3,2,3,2,2,2,2,1,2,1,1,1,2,2,
-0,2,1,1,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
-3,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,0,0,0,1,0,0,0,0,0,
-1,0,1,0,0,0,0,0,2,0,0,0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,2,3,3,2,3,1,2,2,2,2,3,2,3,1,1,2,2,1,2,2,1,1,0,2,2,2,2,
-0,1,0,1,2,2,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,
-3,0,0,1,1,0,1,0,0,1,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,2,2,0,
-0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,0,1,0,1,0,1,1,0,1,1,0,0,0,1,1,0,1,1,1,0,0,0,0,0,0,1,0,0,0,0,0,
-0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,0,0,0,1,1,0,1,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,
-3,2,2,1,2,2,2,2,2,2,2,1,2,2,1,2,2,1,1,1,1,1,1,1,1,2,1,1,0,3,3,3,
-0,3,0,2,2,2,2,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
-2,2,2,3,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,1,2,2,1,2,2,2,1,1,1,2,0,1,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,2,2,2,2,2,2,2,2,2,2,1,2,2,2,2,2,2,2,2,2,2,2,0,2,2,0,0,0,0,0,0,
-0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,3,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,1,2,1,0,2,1,0,
-0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,1,1,1,1,1,1,1,1,1,1,0,0,1,1,1,1,0,1,1,1,1,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,
-0,3,1,1,2,2,2,2,2,1,2,2,2,1,1,2,2,2,2,2,2,2,1,2,2,1,0,1,1,1,1,0,
-0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,2,1,1,1,1,2,1,1,2,1,0,1,1,1,1,1,1,1,1,1,1,1,0,1,0,0,0,0,0,0,0,
-0,0,2,0,0,0,0,0,0,0,0,1,1,0,0,0,0,1,1,0,0,1,1,0,0,0,0,0,0,1,0,0,
-2,1,1,2,2,2,2,2,2,2,2,2,2,2,1,2,2,2,2,2,1,2,1,2,1,1,1,1,0,0,0,0,
-0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,2,1,2,2,2,2,2,2,2,2,2,2,1,2,1,2,1,1,2,1,1,1,2,1,2,1,2,0,1,0,1,
-0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,3,1,2,2,2,1,2,2,2,2,2,2,2,2,1,2,1,1,1,1,1,1,2,1,2,1,1,0,1,0,1,
-0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,1,2,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,2,2,
-0,2,0,1,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
-3,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,1,1,1,1,1,1,1,0,1,1,0,1,0,0,1,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,2,0,1,1,1,0,1,0,0,0,1,1,0,1,1,0,0,0,0,0,1,1,0,0,
-0,1,1,1,2,1,2,2,2,0,2,0,2,0,1,1,2,1,1,1,1,2,1,0,1,1,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,0,1,0,0,0,0,0,1,0,1,2,2,0,1,0,0,1,1,2,2,1,2,0,2,0,0,0,1,2,0,1,
-2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,2,0,2,1,2,0,2,0,0,1,1,1,1,1,1,0,1,0,0,0,1,0,0,1,
-2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,1,0,0,0,0,0,1,0,2,1,1,0,1,0,0,1,1,1,2,2,0,0,1,0,0,0,1,0,0,1,
-1,1,2,1,0,1,1,1,0,1,0,1,1,1,1,0,0,0,1,0,1,0,0,0,0,0,0,0,0,2,2,1,
-0,2,0,1,2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,1,0,0,1,0,1,1,1,1,0,0,0,0,0,1,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,1,1,1,1,1,1,1,1,2,1,0,1,1,1,1,1,1,1,1,1,1,1,0,1,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,1,1,1,0,0,0,0,1,1,1,0,1,1,0,1,0,0,0,1,1,0,1,
-2,0,1,0,1,0,1,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,1,0,1,1,1,0,1,0,0,1,1,2,1,1,2,0,1,0,0,0,1,1,0,1,
-1,0,0,1,0,0,1,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,1,0,1,1,2,0,1,0,0,0,0,2,1,1,2,0,2,0,0,0,1,1,0,1,
-1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,1,0,2,1,1,0,1,0,0,2,2,1,2,1,1,0,1,0,0,0,1,1,0,1,
-2,0,1,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,1,2,2,0,0,0,0,0,1,1,0,1,0,0,1,0,0,0,0,1,0,1,
-1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,1,2,2,0,0,0,0,2,1,1,1,0,2,1,1,0,0,0,2,1,0,1,
-1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,1,0,1,1,2,0,1,0,0,1,1,0,2,1,1,0,1,0,0,0,1,1,0,1,
-2,2,1,1,1,0,1,1,0,1,1,0,1,0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,1,0,2,1,1,0,1,0,0,1,1,0,1,2,1,0,2,0,0,0,1,1,0,1,
-2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,
-0,1,0,0,2,0,2,1,1,0,1,0,1,0,0,1,0,0,0,0,1,0,0,0,1,0,0,0,0,0,1,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,0,0,1,0,0,1,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,1,0,1,1,2,0,1,0,0,1,1,1,0,1,0,0,1,0,0,0,1,0,0,1,
-1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,0,0,0,0,0,0,0,1,0,1,1,0,0,1,0,0,2,1,1,1,1,1,0,1,0,0,0,0,1,0,1,
-0,1,1,1,2,1,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,1,2,1,0,0,0,0,0,1,1,1,1,1,0,1,0,0,0,1,1,0,0,
-)
-
-Win1255HebrewModel = {
-  'char_to_order_map': WIN1255_CHAR_TO_ORDER_MAP,
-  'precedence_matrix': HEBREW_LANG_MODEL,
-  'typical_positive_ratio': 0.984004,
-  'keep_english_letter': False,
-  'charset_name': "windows-1255",
-  'language': 'Hebrew',
-}
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/langhungarianmodel.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/langhungarianmodel.py
deleted file mode 100644
index bb7c095..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/langhungarianmodel.py
+++ /dev/null
@@ -1,225 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-# 255: Control characters that usually does not exist in any text
-# 254: Carriage/Return
-# 253: symbol (punctuation) that does not belong to word
-# 252: 0 - 9
-
-# Character Mapping Table:
-Latin2_HungarianCharToOrderMap = (
-255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
-253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
-252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
-253, 28, 40, 54, 45, 32, 50, 49, 38, 39, 53, 36, 41, 34, 35, 47,
- 46, 71, 43, 33, 37, 57, 48, 64, 68, 55, 52,253,253,253,253,253,
-253,  2, 18, 26, 17,  1, 27, 12, 20,  9, 22,  7,  6, 13,  4,  8,
- 23, 67, 10,  5,  3, 21, 19, 65, 62, 16, 11,253,253,253,253,253,
-159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,
-175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,
-191,192,193,194,195,196,197, 75,198,199,200,201,202,203,204,205,
- 79,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,
-221, 51, 81,222, 78,223,224,225,226, 44,227,228,229, 61,230,231,
-232,233,234, 58,235, 66, 59,236,237,238, 60, 69, 63,239,240,241,
- 82, 14, 74,242, 70, 80,243, 72,244, 15, 83, 77, 84, 30, 76, 85,
-245,246,247, 25, 73, 42, 24,248,249,250, 31, 56, 29,251,252,253,
-)
-
-win1250HungarianCharToOrderMap = (
-255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
-253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
-252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
-253, 28, 40, 54, 45, 32, 50, 49, 38, 39, 53, 36, 41, 34, 35, 47,
- 46, 72, 43, 33, 37, 57, 48, 64, 68, 55, 52,253,253,253,253,253,
-253,  2, 18, 26, 17,  1, 27, 12, 20,  9, 22,  7,  6, 13,  4,  8,
- 23, 67, 10,  5,  3, 21, 19, 65, 62, 16, 11,253,253,253,253,253,
-161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,
-177,178,179,180, 78,181, 69,182,183,184,185,186,187,188,189,190,
-191,192,193,194,195,196,197, 76,198,199,200,201,202,203,204,205,
- 81,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,
-221, 51, 83,222, 80,223,224,225,226, 44,227,228,229, 61,230,231,
-232,233,234, 58,235, 66, 59,236,237,238, 60, 70, 63,239,240,241,
- 84, 14, 75,242, 71, 82,243, 73,244, 15, 85, 79, 86, 30, 77, 87,
-245,246,247, 25, 74, 42, 24,248,249,250, 31, 56, 29,251,252,253,
-)
-
-# Model Table:
-# total sequences: 100%
-# first 512 sequences: 94.7368%
-# first 1024 sequences:5.2623%
-# rest  sequences:     0.8894%
-# negative sequences:  0.0009%
-HungarianLangModel = (
-0,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,1,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,
-3,3,3,3,3,3,3,3,3,3,2,3,3,3,3,3,3,3,3,2,2,3,3,1,1,2,2,2,2,2,1,2,
-3,2,2,3,3,3,3,3,2,3,3,3,3,3,3,1,2,3,3,3,3,2,3,3,1,1,3,3,0,1,1,1,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,
-3,2,1,3,3,3,3,3,2,3,3,3,3,3,1,1,2,3,3,3,3,3,3,3,1,1,3,2,0,1,1,1,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
-3,3,3,3,3,3,3,3,3,3,3,1,1,2,3,3,3,1,3,3,3,3,3,1,3,3,2,2,0,3,2,3,
-0,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,
-3,3,3,3,3,3,2,3,3,3,2,3,3,2,3,3,3,3,3,2,3,3,2,2,3,2,3,2,0,3,2,2,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,
-3,3,3,3,3,3,2,3,3,3,3,3,2,3,3,3,1,2,3,2,2,3,1,2,3,3,2,2,0,3,3,3,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,3,3,2,2,3,3,3,3,3,3,2,3,3,3,3,2,3,3,3,3,0,2,3,2,
-0,0,0,1,1,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,3,3,3,1,1,1,3,3,2,1,3,2,2,3,2,1,3,2,2,1,0,3,3,1,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
-3,2,2,3,3,3,3,3,1,2,3,3,3,3,1,2,1,3,3,3,3,2,2,3,1,1,3,2,0,1,1,1,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
-3,3,3,3,3,3,3,3,2,2,3,3,3,3,3,2,1,3,3,3,3,3,2,2,1,3,3,3,0,1,1,2,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,3,3,2,3,3,2,3,3,3,2,0,3,2,3,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,1,0,
-3,3,3,3,3,3,2,3,3,3,2,3,2,3,3,3,1,3,2,2,2,3,1,1,3,3,1,1,0,3,3,2,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,2,3,3,3,2,3,2,3,3,3,2,3,3,3,3,3,1,2,3,2,2,0,2,2,2,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
-3,3,3,2,2,2,3,1,3,3,2,2,1,3,3,3,1,1,3,1,2,3,2,3,2,2,2,1,0,2,2,2,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,
-3,1,1,3,3,3,3,3,1,2,3,3,3,3,1,2,1,3,3,3,2,2,3,2,1,0,3,2,0,1,1,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,1,1,3,3,3,3,3,1,2,3,3,3,3,1,1,0,3,3,3,3,0,2,3,0,0,2,1,0,1,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,2,2,3,3,2,2,2,2,3,3,0,1,2,3,2,3,2,2,3,2,1,2,0,2,2,2,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,
-3,3,3,3,3,3,1,2,3,3,3,2,1,2,3,3,2,2,2,3,2,3,3,1,3,3,1,1,0,2,3,2,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
-3,3,3,1,2,2,2,2,3,3,3,1,1,1,3,3,1,1,3,1,1,3,2,1,2,3,1,1,0,2,2,2,
-0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
-3,3,3,2,1,2,1,1,3,3,1,1,1,1,3,3,1,1,2,2,1,2,1,1,2,2,1,1,0,2,2,1,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
-3,3,3,1,1,2,1,1,3,3,1,0,1,1,3,3,2,0,1,1,2,3,1,0,2,2,1,0,0,1,3,2,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
-3,2,1,3,3,3,3,3,1,2,3,2,3,3,2,1,1,3,2,3,2,1,2,2,0,1,2,1,0,0,1,1,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
-3,3,3,3,2,2,2,2,3,1,2,2,1,1,3,3,0,3,2,1,2,3,2,1,3,3,1,1,0,2,1,3,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
-3,3,3,2,2,2,3,2,3,3,3,2,1,1,3,3,1,1,1,2,2,3,2,3,2,2,2,1,0,2,2,1,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
-1,0,0,3,3,3,3,3,0,0,3,3,2,3,0,0,0,2,3,3,1,0,1,2,0,0,1,1,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,1,2,3,3,3,3,3,1,2,3,3,2,2,1,1,0,3,3,2,2,1,2,2,1,0,2,2,0,1,1,1,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,2,2,1,3,1,2,3,3,2,2,1,1,2,2,1,1,1,1,3,2,1,1,1,1,2,1,0,1,2,1,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,1,0,0,0,0,0,0,0,0,0,
-2,3,3,1,1,1,1,1,3,3,3,0,1,1,3,3,1,1,1,1,1,2,2,0,3,1,1,2,0,2,1,1,
-0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
-3,1,0,1,2,1,2,2,0,1,2,3,1,2,0,0,0,2,1,1,1,1,1,2,0,0,1,1,0,0,0,0,
-1,2,1,2,2,2,1,2,1,2,0,2,0,2,2,1,1,2,1,1,2,1,1,1,0,1,0,0,0,1,1,0,
-1,1,1,2,3,2,3,3,0,1,2,2,3,1,0,1,0,2,1,2,2,0,1,1,0,0,1,1,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,0,0,3,3,2,2,1,0,0,3,2,3,2,0,0,0,1,1,3,0,0,1,1,0,0,2,1,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,1,1,2,2,3,3,1,0,1,3,2,3,1,1,1,0,1,1,1,1,1,3,1,0,0,2,2,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,1,1,1,2,2,2,1,0,1,2,3,3,2,0,0,0,2,1,1,1,2,1,1,1,0,1,1,1,0,0,0,
-1,2,2,2,2,2,1,1,1,2,0,2,1,1,1,1,1,2,1,1,1,1,1,1,0,1,1,1,0,0,1,1,
-3,2,2,1,0,0,1,1,2,2,0,3,0,1,2,1,1,0,0,1,1,1,0,1,1,1,1,0,2,1,1,1,
-2,2,1,1,1,2,1,2,1,1,1,1,1,1,1,2,1,1,1,2,3,1,1,1,1,1,1,1,1,1,0,1,
-2,3,3,0,1,0,0,0,3,3,1,0,0,1,2,2,1,0,0,0,0,2,0,0,1,1,1,0,2,1,1,1,
-2,1,1,1,1,1,1,2,1,1,0,1,1,0,1,1,1,0,1,2,1,1,0,1,1,1,1,1,1,1,0,1,
-2,3,3,0,1,0,0,0,2,2,0,0,0,0,1,2,2,0,0,0,0,1,0,0,1,1,0,0,2,0,1,0,
-2,1,1,1,1,2,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,2,0,1,1,1,1,1,0,1,
-3,2,2,0,1,0,1,0,2,3,2,0,0,1,2,2,1,0,0,1,1,1,0,0,2,1,0,1,2,2,1,1,
-2,1,1,1,1,1,1,2,1,1,1,1,1,1,0,2,1,0,1,1,0,1,1,1,0,1,1,2,1,1,0,1,
-2,2,2,0,0,1,0,0,2,2,1,1,0,0,2,1,1,0,0,0,1,2,0,0,2,1,0,0,2,1,1,1,
-2,1,1,1,1,2,1,2,1,1,1,2,2,1,1,2,1,1,1,2,1,1,1,1,1,1,1,1,1,1,0,1,
-1,2,3,0,0,0,1,0,3,2,1,0,0,1,2,1,1,0,0,0,0,2,1,0,1,1,0,0,2,1,2,1,
-1,1,0,0,0,1,0,1,1,1,1,1,2,0,0,1,0,0,0,2,0,0,1,1,1,1,1,1,1,1,0,1,
-3,0,0,2,1,2,2,1,0,0,2,1,2,2,0,0,0,2,1,1,1,0,1,1,0,0,1,1,2,0,0,0,
-1,2,1,2,2,1,1,2,1,2,0,1,1,1,1,1,1,1,1,1,2,1,1,0,0,1,1,1,1,0,0,1,
-1,3,2,0,0,0,1,0,2,2,2,0,0,0,2,2,1,0,0,0,0,3,1,1,1,1,0,0,2,1,1,1,
-2,1,0,1,1,1,0,1,1,1,1,1,1,1,0,2,1,0,0,1,0,1,1,0,1,1,1,1,1,1,0,1,
-2,3,2,0,0,0,1,0,2,2,0,0,0,0,2,1,1,0,0,0,0,2,1,0,1,1,0,0,2,1,1,0,
-2,1,1,1,1,2,1,2,1,2,0,1,1,1,0,2,1,1,1,2,1,1,1,1,0,1,1,1,1,1,0,1,
-3,1,1,2,2,2,3,2,1,1,2,2,1,1,0,1,0,2,2,1,1,1,1,1,0,0,1,1,0,1,1,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,2,2,0,0,0,0,0,2,2,0,0,0,0,2,2,1,0,0,0,1,1,0,0,1,2,0,0,2,1,1,1,
-2,2,1,1,1,2,1,2,1,1,0,1,1,1,1,2,1,1,1,2,1,1,1,1,0,1,2,1,1,1,0,1,
-1,0,0,1,2,3,2,1,0,0,2,0,1,1,0,0,0,1,1,1,1,0,1,1,0,0,1,0,0,0,0,0,
-1,2,1,2,1,2,1,1,1,2,0,2,1,1,1,0,1,2,0,0,1,1,1,0,0,0,0,0,0,0,0,0,
-2,3,2,0,0,0,0,0,1,1,2,1,0,0,1,1,1,0,0,0,0,2,0,0,1,1,0,0,2,1,1,1,
-2,1,1,1,1,1,1,2,1,0,1,1,1,1,0,2,1,1,1,1,1,1,0,1,0,1,1,1,1,1,0,1,
-1,2,2,0,1,1,1,0,2,2,2,0,0,0,3,2,1,0,0,0,1,1,0,0,1,1,0,1,1,1,0,0,
-1,1,0,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,2,1,1,1,0,0,1,1,1,0,1,0,1,
-2,1,0,2,1,1,2,2,1,1,2,1,1,1,0,0,0,1,1,0,1,1,1,1,0,0,1,1,1,0,0,0,
-1,2,2,2,2,2,1,1,1,2,0,2,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,0,0,0,1,0,
-1,2,3,0,0,0,1,0,2,2,0,0,0,0,2,2,0,0,0,0,0,1,0,0,1,0,0,0,2,0,1,0,
-2,1,1,1,1,1,0,2,0,0,0,1,2,1,1,1,1,0,1,2,0,1,0,1,0,1,1,1,0,1,0,1,
-2,2,2,0,0,0,1,0,2,1,2,0,0,0,1,1,2,0,0,0,0,1,0,0,1,1,0,0,2,1,0,1,
-2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,0,1,1,1,1,1,0,1,
-1,2,2,0,0,0,1,0,2,2,2,0,0,0,1,1,0,0,0,0,0,1,1,0,2,0,0,1,1,1,0,1,
-1,0,1,1,1,1,1,1,0,1,1,1,1,0,0,1,0,0,1,1,0,1,0,1,1,1,1,1,0,0,0,1,
-1,0,0,1,0,1,2,1,0,0,1,1,1,2,0,0,0,1,1,0,1,0,1,1,0,0,1,0,0,0,0,0,
-0,2,1,2,1,1,1,1,1,2,0,2,0,1,1,0,1,2,1,0,1,1,1,0,0,0,0,0,0,1,0,0,
-2,1,1,0,1,2,0,0,1,1,1,0,0,0,1,1,0,0,0,0,0,1,0,0,1,0,0,0,2,1,0,1,
-2,2,1,1,1,1,1,2,1,1,0,1,1,1,1,2,1,1,1,2,1,1,0,1,0,1,1,1,1,1,0,1,
-1,2,2,0,0,0,0,0,1,1,0,0,0,0,2,1,0,0,0,0,0,2,0,0,2,2,0,0,2,0,0,1,
-2,1,1,1,1,1,1,1,0,1,1,0,1,1,0,1,0,0,0,1,1,1,1,0,0,1,1,1,1,0,0,1,
-1,1,2,0,0,3,1,0,2,1,1,1,0,0,1,1,1,0,0,0,1,1,0,0,0,1,0,0,1,0,1,0,
-1,2,1,0,1,1,1,2,1,1,0,1,1,1,1,1,0,0,0,1,1,1,1,1,0,1,0,0,0,1,0,0,
-2,1,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,0,1,0,0,0,1,0,0,0,0,2,0,0,0,
-2,1,1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,1,1,2,1,1,0,0,1,1,1,1,1,0,1,
-2,1,1,1,2,1,1,1,0,1,1,2,1,0,0,0,0,1,1,1,1,0,1,0,0,0,0,1,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,1,0,1,1,1,1,1,0,0,1,1,2,1,0,0,0,1,1,0,0,0,1,1,0,0,1,0,1,0,0,0,
-1,2,1,1,1,1,1,1,1,1,0,1,0,1,1,1,1,1,1,0,1,1,1,0,0,0,0,0,0,1,0,0,
-2,0,0,0,1,1,1,1,0,0,1,1,0,0,0,0,0,1,1,1,2,0,0,1,0,0,1,0,1,0,0,0,
-0,1,1,1,1,1,1,1,1,2,0,1,1,1,1,0,1,1,1,0,1,1,1,0,0,0,0,0,0,0,0,0,
-1,0,0,1,1,1,1,1,0,0,2,1,0,1,0,0,0,1,0,1,0,0,0,0,0,0,1,0,0,0,0,0,
-0,1,1,1,1,1,1,0,1,1,0,1,0,1,1,0,1,1,0,0,1,1,1,0,0,0,0,0,0,0,0,0,
-1,0,0,1,1,1,0,0,0,0,1,0,2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
-0,1,1,1,1,1,0,0,1,1,0,1,0,1,0,0,1,1,1,0,1,1,1,0,0,0,0,0,0,0,0,0,
-0,0,0,1,0,0,0,0,0,0,1,1,2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,1,1,1,0,1,0,0,1,1,0,1,0,1,1,0,1,1,1,0,1,1,1,0,0,0,0,0,0,0,0,0,
-2,1,1,1,1,1,1,1,1,1,1,0,0,1,1,1,0,0,1,0,0,1,0,1,0,1,1,1,0,0,1,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,0,0,1,1,1,1,0,0,0,1,1,1,0,0,0,0,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,
-0,1,1,1,1,1,1,0,1,1,0,1,0,1,0,0,1,1,0,0,1,1,0,0,0,0,0,0,0,0,0,0,
-)
-
-Latin2HungarianModel = {
-  'char_to_order_map': Latin2_HungarianCharToOrderMap,
-  'precedence_matrix': HungarianLangModel,
-  'typical_positive_ratio': 0.947368,
-  'keep_english_letter': True,
-  'charset_name': "ISO-8859-2",
-  'language': 'Hungarian',
-}
-
-Win1250HungarianModel = {
-  'char_to_order_map': win1250HungarianCharToOrderMap,
-  'precedence_matrix': HungarianLangModel,
-  'typical_positive_ratio': 0.947368,
-  'keep_english_letter': True,
-  'charset_name': "windows-1250",
-  'language': 'Hungarian',
-}
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/langthaimodel.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/langthaimodel.py
deleted file mode 100644
index 15f94c2..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/langthaimodel.py
+++ /dev/null
@@ -1,199 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-# 255: Control characters that usually does not exist in any text
-# 254: Carriage/Return
-# 253: symbol (punctuation) that does not belong to word
-# 252: 0 - 9
-
-# The following result for thai was collected from a limited sample (1M).
-
-# Character Mapping Table:
-TIS620CharToOrderMap = (
-255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
-253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
-252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
-253,182,106,107,100,183,184,185,101, 94,186,187,108,109,110,111,  # 40
-188,189,190, 89, 95,112,113,191,192,193,194,253,253,253,253,253,  # 50
-253, 64, 72, 73,114, 74,115,116,102, 81,201,117, 90,103, 78, 82,  # 60
- 96,202, 91, 79, 84,104,105, 97, 98, 92,203,253,253,253,253,253,  # 70
-209,210,211,212,213, 88,214,215,216,217,218,219,220,118,221,222,
-223,224, 99, 85, 83,225,226,227,228,229,230,231,232,233,234,235,
-236,  5, 30,237, 24,238, 75,  8, 26, 52, 34, 51,119, 47, 58, 57,
- 49, 53, 55, 43, 20, 19, 44, 14, 48,  3, 17, 25, 39, 62, 31, 54,
- 45,  9, 16,  2, 61, 15,239, 12, 42, 46, 18, 21, 76,  4, 66, 63,
- 22, 10,  1, 36, 23, 13, 40, 27, 32, 35, 86,240,241,242,243,244,
- 11, 28, 41, 29, 33,245, 50, 37,  6,  7, 67, 77, 38, 93,246,247,
- 68, 56, 59, 65, 69, 60, 70, 80, 71, 87,248,249,250,251,252,253,
-)
-
-# Model Table:
-# total sequences: 100%
-# first 512 sequences: 92.6386%
-# first 1024 sequences:7.3177%
-# rest  sequences:     1.0230%
-# negative sequences:  0.0436%
-ThaiLangModel = (
-0,1,3,3,3,3,0,0,3,3,0,3,3,0,3,3,3,3,3,3,3,3,0,0,3,3,3,0,3,3,3,3,
-0,3,3,0,0,0,1,3,0,3,3,2,3,3,0,1,2,3,3,3,3,0,2,0,2,0,0,3,2,1,2,2,
-3,0,3,3,2,3,0,0,3,3,0,3,3,0,3,3,3,3,3,3,3,3,3,0,3,2,3,0,2,2,2,3,
-0,2,3,0,0,0,0,1,0,1,2,3,1,1,3,2,2,0,1,1,0,0,1,0,0,0,0,0,0,0,1,1,
-3,3,3,2,3,3,3,3,3,3,3,3,3,3,3,2,2,2,2,2,2,2,3,3,2,3,2,3,3,2,2,2,
-3,1,2,3,0,3,3,2,2,1,2,3,3,1,2,0,1,3,0,1,0,0,1,0,0,0,0,0,0,0,1,1,
-3,3,2,2,3,3,3,3,1,2,3,3,3,3,3,2,2,2,2,3,3,2,2,3,3,2,2,3,2,3,2,2,
-3,3,1,2,3,1,2,2,3,3,1,0,2,1,0,0,3,1,2,1,0,0,1,0,0,0,0,0,0,1,0,1,
-3,3,3,3,3,3,2,2,3,3,3,3,2,3,2,2,3,3,2,2,3,2,2,2,2,1,1,3,1,2,1,1,
-3,2,1,0,2,1,0,1,0,1,1,0,1,1,0,0,1,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,
-3,3,3,2,3,2,3,3,2,2,3,2,3,3,2,3,1,1,2,3,2,2,2,3,2,2,2,2,2,1,2,1,
-2,2,1,1,3,3,2,1,0,1,2,2,0,1,3,0,0,0,1,1,0,0,0,0,0,2,3,0,0,2,1,1,
-3,3,2,3,3,2,0,0,3,3,0,3,3,0,2,2,3,1,2,2,1,1,1,0,2,2,2,0,2,2,1,1,
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-3,3,2,3,3,2,0,0,3,3,0,2,3,0,2,1,2,2,2,2,1,2,0,0,2,2,2,0,2,2,1,1,
-0,2,1,0,2,0,0,2,0,1,1,0,1,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,
-3,3,2,3,2,3,2,0,2,2,1,3,2,1,3,2,1,2,3,2,2,3,0,2,3,2,2,1,2,2,2,2,
-1,2,2,0,0,0,0,2,0,1,2,0,1,1,1,0,1,0,3,1,1,0,0,0,0,0,0,0,0,0,1,0,
-3,3,2,3,3,2,3,2,2,2,3,2,2,3,2,2,1,2,3,2,2,3,1,3,2,2,2,3,2,2,2,3,
-3,2,1,3,0,1,1,1,0,2,1,1,1,1,1,0,1,0,1,1,0,0,0,0,0,0,0,0,0,2,0,0,
-1,0,0,3,0,3,3,3,3,3,0,0,3,0,2,2,3,3,3,3,3,0,0,0,1,1,3,0,0,0,0,2,
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-2,0,3,3,3,3,0,0,2,3,0,0,3,0,3,3,2,3,3,3,3,3,0,0,3,3,3,0,0,0,3,3,
-0,0,3,0,0,0,0,2,0,0,2,1,1,3,0,0,1,0,0,2,3,0,1,0,0,0,0,0,0,0,1,0,
-3,3,3,3,2,3,3,3,3,3,3,3,1,2,1,3,3,2,2,1,2,2,2,3,1,1,2,0,2,1,2,1,
-2,2,1,0,0,0,1,1,0,1,0,1,1,0,0,0,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,
-3,0,2,1,2,3,3,3,0,2,0,2,2,0,2,1,3,2,2,1,2,1,0,0,2,2,1,0,2,1,2,2,
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-3,3,3,3,2,1,3,3,1,1,3,0,2,3,1,1,3,2,1,1,2,0,2,2,3,2,1,1,1,1,1,2,
-3,0,0,1,3,1,2,1,2,0,3,0,0,0,1,0,3,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,
-3,3,1,1,3,2,3,3,3,1,3,2,1,3,2,1,3,2,2,2,2,1,3,3,1,2,1,3,1,2,3,0,
-2,1,1,3,2,2,2,1,2,1,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,
-3,3,2,3,2,3,3,2,3,2,3,2,3,3,2,1,0,3,2,2,2,1,2,2,2,1,2,2,1,2,1,1,
-2,2,2,3,0,1,3,1,1,1,1,0,1,1,0,2,1,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,2,3,2,2,1,1,3,2,3,2,3,2,0,3,2,2,1,2,0,2,2,2,1,2,2,2,2,1,
-3,2,1,2,2,1,0,2,0,1,0,0,1,1,0,0,0,0,0,1,1,0,1,0,0,0,0,0,0,0,0,1,
-3,3,3,3,3,2,3,1,2,3,3,2,2,3,0,1,1,2,0,3,3,2,2,3,0,1,1,3,0,0,0,0,
-3,1,0,3,3,0,2,0,2,1,0,0,3,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,2,3,2,3,3,0,1,3,1,1,2,1,2,1,1,3,1,1,0,2,3,1,1,1,1,1,1,1,1,
-3,1,1,2,2,2,2,1,1,1,0,0,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
-3,2,2,1,1,2,1,3,3,2,3,2,2,3,2,2,3,1,2,2,1,2,0,3,2,1,2,2,2,2,2,1,
-3,2,1,2,2,2,1,1,1,1,0,0,1,1,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,1,3,3,0,2,1,0,3,2,0,0,3,1,0,1,1,0,1,0,0,0,0,0,1,
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-3,0,2,2,2,3,0,0,1,3,0,3,2,0,3,2,2,3,3,3,3,3,1,0,2,2,2,0,2,2,1,2,
-0,2,3,0,0,0,0,1,0,1,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
-3,0,2,3,1,3,3,2,3,3,0,3,3,0,3,2,2,3,2,3,3,3,0,0,2,2,3,0,1,1,1,3,
-0,0,3,0,0,0,2,2,0,1,3,0,1,2,2,2,3,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,
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-3,1,3,2,2,2,1,2,0,1,3,1,1,3,1,3,0,0,2,1,1,1,1,2,1,1,1,0,2,1,0,1,
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-3,3,3,3,2,2,2,2,2,1,3,1,1,1,2,0,1,1,2,1,2,1,3,2,0,0,3,1,1,1,1,1,
-3,1,0,2,3,0,0,0,3,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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-0,0,2,3,1,3,0,0,1,2,0,0,2,0,3,3,2,3,3,3,2,3,0,0,2,2,2,0,0,0,2,2,
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-1,0,0,0,0,1,1,0,3,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,2,1,0,1,1,1,3,1,2,2,2,2,2,2,1,1,1,1,0,3,1,0,1,3,1,1,1,1,
-1,1,0,2,0,1,3,1,1,0,0,1,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,2,0,1,
-3,0,2,2,1,3,3,2,3,3,0,1,1,0,2,2,1,2,1,3,3,1,0,0,3,2,0,0,0,0,2,1,
-0,1,0,0,0,0,1,2,0,1,1,3,1,1,2,2,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,
-0,0,3,0,0,1,0,0,0,3,0,0,3,0,3,1,0,1,1,1,3,2,0,0,0,3,0,0,0,0,2,0,
-0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,2,0,0,0,0,0,0,0,0,0,
-3,3,1,3,2,1,3,3,1,2,2,0,1,2,1,0,1,2,0,0,0,0,0,3,0,0,0,3,0,0,0,0,
-3,0,0,1,1,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,0,1,2,0,3,3,3,2,2,0,1,1,0,1,3,0,0,0,2,2,0,0,0,0,3,1,0,1,0,0,0,
-0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,0,2,3,1,2,0,0,2,1,0,3,1,0,1,2,0,1,1,1,1,3,0,0,3,1,1,0,2,2,1,1,
-0,2,0,0,0,0,0,1,0,1,0,0,1,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,0,0,3,1,2,0,0,2,2,0,1,2,0,1,0,1,3,1,2,1,0,0,0,2,0,3,0,0,0,1,0,
-0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,0,1,1,2,2,0,0,0,2,0,2,1,0,1,1,0,1,1,1,2,1,0,0,1,1,1,0,2,1,1,1,
-0,1,1,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,1,
-0,0,0,2,0,1,3,1,1,1,1,0,0,0,0,3,2,0,1,0,0,0,1,2,0,0,0,1,0,0,0,0,
-0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,3,3,3,3,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,
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-1,0,2,3,2,2,0,0,0,1,0,0,0,0,2,3,2,1,2,2,3,0,0,0,2,3,1,0,0,0,1,1,
-0,0,1,0,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,1,1,0,1,0,0,0,0,0,0,0,0,0,
-3,3,2,2,0,1,0,0,0,0,2,0,2,0,1,0,0,0,1,1,0,0,0,2,1,0,1,0,1,1,0,0,
-0,1,0,2,0,0,1,0,3,0,1,0,0,0,2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,1,0,0,1,0,0,0,0,0,1,1,2,0,0,0,0,1,0,0,1,3,1,0,0,0,0,1,1,0,0,
-0,1,0,0,0,0,3,0,0,0,0,0,0,3,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,
-3,3,1,1,1,1,2,3,0,0,2,1,1,1,1,1,0,2,1,1,0,0,0,2,1,0,1,2,1,1,0,1,
-2,1,0,3,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,3,1,0,0,0,0,0,0,0,3,0,0,0,3,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,1,
-0,0,0,2,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,2,0,0,0,0,0,0,1,2,1,0,1,1,0,2,0,0,1,0,0,2,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,2,0,0,0,1,3,0,1,0,0,0,2,0,0,0,0,0,0,0,1,2,0,0,0,0,0,
-3,3,0,0,1,1,2,0,0,1,2,1,0,1,1,1,0,1,1,0,0,2,1,1,0,1,0,0,1,1,1,0,
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-2,2,2,1,0,0,0,0,1,0,0,0,0,3,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,
-2,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,3,0,0,1,1,0,0,0,2,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-1,1,0,1,2,0,1,2,0,0,1,1,0,2,0,1,0,0,1,0,0,0,0,1,0,0,0,2,0,0,0,0,
-1,0,0,1,0,1,1,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,1,0,0,0,0,0,0,0,1,1,0,1,1,0,2,1,3,0,0,0,0,1,1,0,0,0,0,0,0,0,3,
-1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,0,1,0,1,0,0,2,0,0,2,0,0,1,1,2,0,0,1,1,0,0,0,1,0,0,0,1,1,0,0,0,
-1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
-1,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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-2,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,0,0,0,0,2,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,1,0,1,0,0,0,0,0,0,0,0,
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-2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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-2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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-1,0,0,0,0,0,0,0,0,1,0,0,0,0,2,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,1,1,0,0,2,1,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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-)
-
-TIS620ThaiModel = {
-  'char_to_order_map': TIS620CharToOrderMap,
-  'precedence_matrix': ThaiLangModel,
-  'typical_positive_ratio': 0.926386,
-  'keep_english_letter': False,
-  'charset_name': "TIS-620",
-  'language': 'Thai',
-}
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/langturkishmodel.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/langturkishmodel.py
deleted file mode 100644
index a427a45..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/langturkishmodel.py
+++ /dev/null
@@ -1,193 +0,0 @@
-# -*- coding: utf-8 -*-
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Communicator client code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#   Özgür Baskın - Turkish Language Model
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-# 255: Control characters that usually does not exist in any text
-# 254: Carriage/Return
-# 253: symbol (punctuation) that does not belong to word
-# 252: 0 - 9
-
-# Character Mapping Table:
-Latin5_TurkishCharToOrderMap = (
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
-255, 23, 37, 47, 39, 29, 52, 36, 45, 53, 60, 16, 49, 20, 46, 42,
- 48, 69, 44, 35, 31, 51, 38, 62, 65, 43, 56,255,255,255,255,255,
-255,  1, 21, 28, 12,  2, 18, 27, 25,  3, 24, 10,  5, 13,  4, 15,
- 26, 64,  7,  8,  9, 14, 32, 57, 58, 11, 22,255,255,255,255,255,
-180,179,178,177,176,175,174,173,172,171,170,169,168,167,166,165,
-164,163,162,161,160,159,101,158,157,156,155,154,153,152,151,106,
-150,149,148,147,146,145,144,100,143,142,141,140,139,138,137,136,
- 94, 80, 93,135,105,134,133, 63,132,131,130,129,128,127,126,125,
-124,104, 73, 99, 79, 85,123, 54,122, 98, 92,121,120, 91,103,119,
- 68,118,117, 97,116,115, 50, 90,114,113,112,111, 55, 41, 40, 86,
- 89, 70, 59, 78, 71, 82, 88, 33, 77, 66, 84, 83,110, 75, 61, 96,
- 30, 67,109, 74, 87,102, 34, 95, 81,108, 76, 72, 17,  6, 19,107,
-)
-
-TurkishLangModel = (
-3,2,3,3,3,1,3,3,3,3,3,3,3,3,2,1,1,3,3,1,3,3,0,3,3,3,3,3,0,3,1,3,
-3,2,1,0,0,1,1,0,0,0,1,0,0,1,1,1,1,0,0,0,0,0,0,0,2,2,0,0,1,0,0,1,
-3,2,2,3,3,0,3,3,3,3,3,3,3,2,3,1,0,3,3,1,3,3,0,3,3,3,3,3,0,3,0,3,
-3,1,1,0,1,0,1,0,0,0,0,0,0,1,1,1,1,0,0,0,0,0,0,0,2,2,0,0,0,1,0,1,
-3,3,2,3,3,0,3,3,3,3,3,3,3,2,3,1,1,3,3,0,3,3,1,2,3,3,3,3,0,3,0,3,
-3,1,1,0,0,0,1,0,0,0,0,1,1,0,1,2,1,0,0,0,1,0,0,0,0,2,0,0,0,0,0,1,
-3,3,3,3,3,3,2,3,3,3,3,3,3,3,3,1,3,3,2,0,3,2,1,2,2,1,3,3,0,0,0,2,
-2,2,0,1,0,0,1,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,1,0,1,0,0,1,
-3,3,3,2,3,3,1,2,3,3,3,3,3,3,3,1,3,2,1,0,3,2,0,1,2,3,3,2,1,0,0,2,
-2,1,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,2,0,2,0,0,0,
-1,0,1,3,3,1,3,3,3,3,3,3,3,1,2,0,0,2,3,0,2,3,0,0,2,2,2,3,0,3,0,1,
-2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,0,3,3,3,0,3,2,0,2,3,2,3,3,1,0,0,2,
-3,2,0,0,1,0,0,0,0,0,0,2,0,0,1,0,0,0,0,0,0,0,0,0,1,1,1,0,2,0,0,1,
-3,3,3,2,3,3,2,3,3,3,3,2,3,3,3,0,3,3,0,0,2,1,0,0,2,3,2,2,0,0,0,2,
-2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,1,0,1,0,2,0,0,1,
-3,3,3,2,3,3,3,3,3,3,3,2,3,3,3,0,3,2,0,1,3,2,1,1,3,2,3,2,1,0,0,2,
-2,2,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,0,0,
-3,3,3,2,3,3,3,3,3,3,3,2,3,3,3,0,3,2,2,0,2,3,0,0,2,2,2,2,0,0,0,2,
-3,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,2,0,1,0,0,0,
-3,3,3,3,3,3,3,2,2,2,2,3,2,3,3,0,3,3,1,1,2,2,0,0,2,2,3,2,0,0,1,3,
-0,3,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,0,1,
-3,3,3,2,3,3,3,2,1,2,2,3,2,3,3,0,3,2,0,0,1,1,0,1,1,2,1,2,0,0,0,1,
-0,3,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,1,0,0,0,
-3,3,3,2,3,3,2,3,2,2,2,3,3,3,3,1,3,1,1,0,3,2,1,1,3,3,2,3,1,0,0,1,
-1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,2,0,0,1,
-3,2,2,3,3,0,3,3,3,3,3,3,3,2,2,1,0,3,3,1,3,3,0,1,3,3,2,3,0,3,0,3,
-2,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,
-2,2,2,3,3,0,3,3,3,3,3,3,3,3,3,0,0,3,2,0,3,3,0,3,2,3,3,3,0,3,1,3,
-2,0,0,0,0,0,0,0,0,0,0,1,0,1,2,0,1,0,0,0,0,0,0,0,2,2,0,0,1,0,0,1,
-3,3,3,1,2,3,3,1,0,0,1,0,0,3,3,2,3,0,0,2,0,0,2,0,2,0,0,0,2,0,2,0,
-0,3,1,0,1,0,0,0,2,2,1,0,1,1,2,1,2,2,2,0,2,1,1,0,0,0,2,0,0,0,0,0,
-1,2,1,3,3,0,3,3,3,3,3,2,3,0,0,0,0,2,3,0,2,3,1,0,2,3,1,3,0,3,0,2,
-3,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,1,3,3,2,2,3,2,2,0,1,2,3,0,1,2,1,0,1,0,0,0,1,0,2,2,0,0,0,1,
-1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,1,0,0,1,0,0,0,
-3,3,3,1,3,3,1,1,3,3,1,1,3,3,1,0,2,1,2,0,2,1,0,0,1,1,2,1,0,0,0,2,
-2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,1,0,2,1,3,0,0,2,0,0,3,3,0,3,0,0,1,0,1,2,0,0,1,1,2,2,0,1,0,
-0,1,2,1,1,0,1,0,1,1,1,1,1,0,1,1,1,2,2,1,2,0,1,0,0,0,0,0,0,1,0,0,
-3,3,3,2,3,2,3,3,0,2,2,2,3,3,3,0,3,0,0,0,2,2,0,1,2,1,1,1,0,0,0,1,
-0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,
-3,3,3,3,3,3,2,1,2,2,3,3,3,3,2,0,2,0,0,0,2,2,0,0,2,1,3,3,0,0,1,1,
-1,1,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,
-1,1,2,3,3,0,3,3,3,3,3,3,2,2,0,2,0,2,3,2,3,2,2,2,2,2,2,2,1,3,2,3,
-2,0,2,1,2,2,2,2,1,1,2,2,1,2,2,1,2,0,0,2,1,1,0,2,1,0,0,1,0,0,0,1,
-2,3,3,1,1,1,0,1,1,1,2,3,2,1,1,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,0,
-0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,2,2,2,3,2,3,2,2,1,3,3,3,0,2,1,2,0,2,1,0,0,1,1,1,1,1,0,0,1,
-2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,2,0,1,0,0,0,
-3,3,3,2,3,3,3,3,3,2,3,1,2,3,3,1,2,0,0,0,0,0,0,0,3,2,1,1,0,0,0,0,
-2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,
-3,3,3,2,2,3,3,2,1,1,1,1,1,3,3,0,3,1,0,0,1,1,0,0,3,1,2,1,0,0,0,0,
-0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,
-3,3,3,2,2,3,2,2,2,3,2,1,1,3,3,0,3,0,0,0,0,1,0,0,3,1,1,2,0,0,0,1,
-1,0,0,1,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
-1,1,1,3,3,0,3,3,3,3,3,2,2,2,1,2,0,2,1,2,2,1,1,0,1,2,2,2,2,2,2,2,
-0,0,2,1,2,1,2,1,0,1,1,3,1,2,1,1,2,0,0,2,0,1,0,1,0,1,0,0,0,1,0,1,
-3,3,3,1,3,3,3,0,1,1,0,2,2,3,1,0,3,0,0,0,1,0,0,0,1,0,0,1,0,1,0,0,
-1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,2,0,0,2,2,1,0,0,1,0,0,3,3,1,3,0,0,1,1,0,2,0,3,0,0,0,2,0,1,1,
-0,1,2,0,1,2,2,0,2,2,2,2,1,0,2,1,1,0,2,0,2,1,2,0,0,0,0,0,0,0,0,0,
-3,3,3,1,3,2,3,2,0,2,2,2,1,3,2,0,2,1,2,0,1,2,0,0,1,0,2,2,0,0,0,2,
-1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,1,0,0,0,
-3,3,3,0,3,3,1,1,2,3,1,0,3,2,3,0,3,0,0,0,1,0,0,0,1,0,1,0,0,0,0,0,
-1,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,3,3,0,3,3,2,3,3,2,2,0,0,0,0,1,2,0,1,3,0,0,0,3,1,1,0,3,0,2,
-2,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,1,2,2,1,0,3,1,1,1,1,3,3,2,3,0,0,1,0,1,2,0,2,2,0,2,2,0,2,1,
-0,2,2,1,1,1,1,0,2,1,1,0,1,1,1,1,2,1,2,1,2,0,1,0,1,0,0,0,0,0,0,0,
-3,3,3,0,1,1,3,0,0,1,1,0,0,2,2,0,3,0,0,1,1,0,1,0,0,0,0,0,2,0,0,0,
-0,3,1,0,1,0,1,0,2,0,0,1,0,1,0,1,1,1,2,1,1,0,2,0,0,0,0,0,0,0,0,0,
-3,3,3,0,2,0,2,0,1,1,1,0,0,3,3,0,2,0,0,1,0,0,2,1,1,0,1,0,1,0,1,0,
-0,2,0,1,2,0,2,0,2,1,1,0,1,0,2,1,1,0,2,1,1,0,1,0,0,0,1,1,0,0,0,0,
-3,2,3,0,1,0,0,0,0,0,0,0,0,1,2,0,1,0,0,1,0,0,1,0,0,0,0,0,2,0,0,0,
-0,0,1,1,0,0,1,0,1,0,0,1,0,0,0,2,1,0,1,0,2,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,0,0,2,3,0,0,1,0,1,0,2,3,2,3,0,0,1,3,0,2,1,0,0,0,0,2,0,1,0,
-0,2,1,0,0,1,1,0,2,1,0,0,1,0,0,1,1,0,1,1,2,0,1,0,0,0,0,1,0,0,0,0,
-3,2,2,0,0,1,1,0,0,0,0,0,0,3,1,1,1,0,0,0,0,0,1,0,0,0,0,0,2,0,1,0,
-0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,
-0,0,0,3,3,0,2,3,2,2,1,2,2,1,1,2,0,1,3,2,2,2,0,0,2,2,0,0,0,1,2,1,
-3,0,2,1,1,0,1,1,1,0,1,2,2,2,1,1,2,0,0,0,0,1,0,1,1,0,0,0,0,0,0,0,
-0,1,1,2,3,0,3,3,3,2,2,2,2,1,0,1,0,1,0,1,2,2,0,0,2,2,1,3,1,1,2,1,
-0,0,1,1,2,0,1,1,0,0,1,2,0,2,1,1,2,0,0,1,0,0,0,1,0,1,0,1,0,0,0,0,
-3,3,2,0,0,3,1,0,0,0,0,0,0,3,2,1,2,0,0,1,0,0,2,0,0,0,0,0,2,0,1,0,
-0,2,1,1,0,0,1,0,1,2,0,0,1,1,0,0,2,1,1,1,1,0,2,0,0,0,0,0,0,0,0,0,
-3,3,2,0,0,1,0,0,0,0,1,0,0,3,3,2,2,0,0,1,0,0,2,0,1,0,0,0,2,0,1,0,
-0,0,1,1,0,0,2,0,2,1,0,0,1,1,2,1,2,0,2,1,2,1,1,1,0,0,1,1,0,0,0,0,
-3,3,2,0,0,2,2,0,0,0,1,1,0,2,2,1,3,1,0,1,0,1,2,0,0,0,0,0,1,0,1,0,
-0,1,1,0,0,0,0,0,1,0,0,1,0,0,0,1,1,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,2,0,0,0,1,0,0,1,0,0,2,3,1,2,0,0,1,0,0,2,0,0,0,1,0,2,0,2,0,
-0,1,1,2,2,1,2,0,2,1,1,0,0,1,1,0,1,1,1,1,2,1,1,0,0,0,0,0,0,0,0,0,
-3,3,3,0,2,1,2,1,0,0,1,1,0,3,3,1,2,0,0,1,0,0,2,0,2,0,1,1,2,0,0,0,
-0,0,1,1,1,1,2,0,1,1,0,1,1,1,1,0,0,0,1,1,1,0,1,0,0,0,1,0,0,0,0,0,
-3,3,3,0,2,2,3,2,0,0,1,0,0,2,3,1,0,0,0,0,0,0,2,0,2,0,0,0,2,0,0,0,
-0,1,1,0,0,0,1,0,0,1,0,1,1,0,1,0,1,1,1,0,1,0,0,0,0,0,0,0,0,0,0,0,
-3,2,3,0,0,0,0,0,0,0,1,0,0,2,2,2,2,0,0,1,0,0,2,0,0,0,0,0,2,0,1,0,
-0,0,2,1,1,0,1,0,2,1,1,0,0,1,1,2,1,0,2,0,2,0,1,0,0,0,2,0,0,0,0,0,
-0,0,0,2,2,0,2,1,1,1,1,2,2,0,0,1,0,1,0,0,1,3,0,0,0,0,1,0,0,2,1,0,
-0,0,1,0,1,0,0,0,0,0,2,1,0,1,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,
-2,0,0,2,3,0,2,3,1,2,2,0,2,0,0,2,0,2,1,1,1,2,1,0,0,1,2,1,1,2,1,0,
-1,0,2,0,1,0,1,1,0,0,2,2,1,2,1,1,2,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,
-3,3,3,0,2,1,2,0,0,0,1,0,0,3,2,0,1,0,0,1,0,0,2,0,0,0,1,2,1,0,1,0,
-0,0,0,0,1,0,1,0,0,1,0,0,0,0,1,0,1,0,1,1,1,0,1,0,0,0,0,0,0,0,0,0,
-0,0,0,2,2,0,2,2,1,1,0,1,1,1,1,1,0,0,1,2,1,1,1,0,1,0,0,0,1,1,1,1,
-0,0,2,1,0,1,1,1,0,1,1,2,1,2,1,1,2,0,1,1,2,1,0,2,0,0,0,0,0,0,0,0,
-3,2,2,0,0,2,0,0,0,0,0,0,0,2,2,0,2,0,0,1,0,0,2,0,0,0,0,0,2,0,0,0,
-0,2,1,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,
-0,0,0,3,2,0,2,2,0,1,1,0,1,0,0,1,0,0,0,1,0,1,0,0,0,0,0,1,0,0,0,0,
-2,0,1,0,1,0,1,1,0,0,1,2,0,1,0,1,1,0,0,1,0,1,0,2,0,0,0,0,0,0,0,0,
-2,2,2,0,1,1,0,0,0,1,0,0,0,1,2,0,1,0,0,1,0,0,1,0,0,0,0,1,2,0,1,0,
-0,0,1,0,0,0,1,0,0,1,0,0,0,0,0,0,1,0,1,0,2,0,0,0,0,0,0,0,0,0,0,0,
-2,2,2,2,1,0,1,1,1,0,0,0,0,1,2,0,0,1,0,0,0,1,0,0,1,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,
-1,1,2,0,1,0,0,0,1,0,1,0,0,0,1,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,2,0,0,0,0,0,1,
-0,0,1,2,2,0,2,1,2,1,1,2,2,0,0,0,0,1,0,0,1,1,0,0,2,0,0,0,0,1,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,
-2,2,2,0,0,0,1,0,0,0,0,0,0,2,2,1,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,
-0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,1,1,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-2,2,2,0,1,0,1,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,1,0,1,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,1,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,1,0,0,0,0,0,0,0,0,0,0,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-)
-
-Latin5TurkishModel = {
-  'char_to_order_map': Latin5_TurkishCharToOrderMap,
-  'precedence_matrix': TurkishLangModel,
-  'typical_positive_ratio': 0.970290,
-  'keep_english_letter': True,
-  'charset_name': "ISO-8859-9",
-  'language': 'Turkish',
-}
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/latin1prober.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/latin1prober.py
deleted file mode 100644
index 7d1e8c2..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/latin1prober.py
+++ /dev/null
@@ -1,145 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Universal charset detector code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 2001
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#   Shy Shalom - original C code
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .charsetprober import CharSetProber
-from .enums import ProbingState
-
-FREQ_CAT_NUM = 4
-
-UDF = 0  # undefined
-OTH = 1  # other
-ASC = 2  # ascii capital letter
-ASS = 3  # ascii small letter
-ACV = 4  # accent capital vowel
-ACO = 5  # accent capital other
-ASV = 6  # accent small vowel
-ASO = 7  # accent small other
-CLASS_NUM = 8  # total classes
-
-Latin1_CharToClass = (
-    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 00 - 07
-    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 08 - 0F
-    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 10 - 17
-    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 18 - 1F
-    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 20 - 27
-    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 28 - 2F
-    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 30 - 37
-    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 38 - 3F
-    OTH, ASC, ASC, ASC, ASC, ASC, ASC, ASC,   # 40 - 47
-    ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC,   # 48 - 4F
-    ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC,   # 50 - 57
-    ASC, ASC, ASC, OTH, OTH, OTH, OTH, OTH,   # 58 - 5F
-    OTH, ASS, ASS, ASS, ASS, ASS, ASS, ASS,   # 60 - 67
-    ASS, ASS, ASS, ASS, ASS, ASS, ASS, ASS,   # 68 - 6F
-    ASS, ASS, ASS, ASS, ASS, ASS, ASS, ASS,   # 70 - 77
-    ASS, ASS, ASS, OTH, OTH, OTH, OTH, OTH,   # 78 - 7F
-    OTH, UDF, OTH, ASO, OTH, OTH, OTH, OTH,   # 80 - 87
-    OTH, OTH, ACO, OTH, ACO, UDF, ACO, UDF,   # 88 - 8F
-    UDF, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 90 - 97
-    OTH, OTH, ASO, OTH, ASO, UDF, ASO, ACO,   # 98 - 9F
-    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # A0 - A7
-    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # A8 - AF
-    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # B0 - B7
-    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # B8 - BF
-    ACV, ACV, ACV, ACV, ACV, ACV, ACO, ACO,   # C0 - C7
-    ACV, ACV, ACV, ACV, ACV, ACV, ACV, ACV,   # C8 - CF
-    ACO, ACO, ACV, ACV, ACV, ACV, ACV, OTH,   # D0 - D7
-    ACV, ACV, ACV, ACV, ACV, ACO, ACO, ACO,   # D8 - DF
-    ASV, ASV, ASV, ASV, ASV, ASV, ASO, ASO,   # E0 - E7
-    ASV, ASV, ASV, ASV, ASV, ASV, ASV, ASV,   # E8 - EF
-    ASO, ASO, ASV, ASV, ASV, ASV, ASV, OTH,   # F0 - F7
-    ASV, ASV, ASV, ASV, ASV, ASO, ASO, ASO,   # F8 - FF
-)
-
-# 0 : illegal
-# 1 : very unlikely
-# 2 : normal
-# 3 : very likely
-Latin1ClassModel = (
-# UDF OTH ASC ASS ACV ACO ASV ASO
-    0,  0,  0,  0,  0,  0,  0,  0,  # UDF
-    0,  3,  3,  3,  3,  3,  3,  3,  # OTH
-    0,  3,  3,  3,  3,  3,  3,  3,  # ASC
-    0,  3,  3,  3,  1,  1,  3,  3,  # ASS
-    0,  3,  3,  3,  1,  2,  1,  2,  # ACV
-    0,  3,  3,  3,  3,  3,  3,  3,  # ACO
-    0,  3,  1,  3,  1,  1,  1,  3,  # ASV
-    0,  3,  1,  3,  1,  1,  3,  3,  # ASO
-)
-
-
-class Latin1Prober(CharSetProber):
-    def __init__(self):
-        super(Latin1Prober, self).__init__()
-        self._last_char_class = None
-        self._freq_counter = None
-        self.reset()
-
-    def reset(self):
-        self._last_char_class = OTH
-        self._freq_counter = [0] * FREQ_CAT_NUM
-        CharSetProber.reset(self)
-
-    @property
-    def charset_name(self):
-        return "ISO-8859-1"
-
-    @property
-    def language(self):
-        return ""
-
-    def feed(self, byte_str):
-        byte_str = self.filter_with_english_letters(byte_str)
-        for c in byte_str:
-            char_class = Latin1_CharToClass[c]
-            freq = Latin1ClassModel[(self._last_char_class * CLASS_NUM)
-                                    + char_class]
-            if freq == 0:
-                self._state = ProbingState.NOT_ME
-                break
-            self._freq_counter[freq] += 1
-            self._last_char_class = char_class
-
-        return self.state
-
-    def get_confidence(self):
-        if self.state == ProbingState.NOT_ME:
-            return 0.01
-
-        total = sum(self._freq_counter)
-        if total < 0.01:
-            confidence = 0.0
-        else:
-            confidence = ((self._freq_counter[3] - self._freq_counter[1] * 20.0)
-                          / total)
-        if confidence < 0.0:
-            confidence = 0.0
-        # lower the confidence of latin1 so that other more accurate
-        # detector can take priority.
-        confidence = confidence * 0.73
-        return confidence
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/mbcharsetprober.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/mbcharsetprober.py
deleted file mode 100644
index 6256ecf..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/mbcharsetprober.py
+++ /dev/null
@@ -1,91 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Universal charset detector code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 2001
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#   Shy Shalom - original C code
-#   Proofpoint, Inc.
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .charsetprober import CharSetProber
-from .enums import ProbingState, MachineState
-
-
-class MultiByteCharSetProber(CharSetProber):
-    """
-    MultiByteCharSetProber
-    """
-
-    def __init__(self, lang_filter=None):
-        super(MultiByteCharSetProber, self).__init__(lang_filter=lang_filter)
-        self.distribution_analyzer = None
-        self.coding_sm = None
-        self._last_char = [0, 0]
-
-    def reset(self):
-        super(MultiByteCharSetProber, self).reset()
-        if self.coding_sm:
-            self.coding_sm.reset()
-        if self.distribution_analyzer:
-            self.distribution_analyzer.reset()
-        self._last_char = [0, 0]
-
-    @property
-    def charset_name(self):
-        raise NotImplementedError
-
-    @property
-    def language(self):
-        raise NotImplementedError
-
-    def feed(self, byte_str):
-        for i in range(len(byte_str)):
-            coding_state = self.coding_sm.next_state(byte_str[i])
-            if coding_state == MachineState.ERROR:
-                self.logger.debug('%s %s prober hit error at byte %s',
-                                  self.charset_name, self.language, i)
-                self._state = ProbingState.NOT_ME
-                break
-            elif coding_state == MachineState.ITS_ME:
-                self._state = ProbingState.FOUND_IT
-                break
-            elif coding_state == MachineState.START:
-                char_len = self.coding_sm.get_current_charlen()
-                if i == 0:
-                    self._last_char[1] = byte_str[0]
-                    self.distribution_analyzer.feed(self._last_char, char_len)
-                else:
-                    self.distribution_analyzer.feed(byte_str[i - 1:i + 1],
-                                                    char_len)
-
-        self._last_char[0] = byte_str[-1]
-
-        if self.state == ProbingState.DETECTING:
-            if (self.distribution_analyzer.got_enough_data() and
-                    (self.get_confidence() > self.SHORTCUT_THRESHOLD)):
-                self._state = ProbingState.FOUND_IT
-
-        return self.state
-
-    def get_confidence(self):
-        return self.distribution_analyzer.get_confidence()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/mbcsgroupprober.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/mbcsgroupprober.py
deleted file mode 100644
index 530abe7..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/mbcsgroupprober.py
+++ /dev/null
@@ -1,54 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Universal charset detector code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 2001
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#   Shy Shalom - original C code
-#   Proofpoint, Inc.
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .charsetgroupprober import CharSetGroupProber
-from .utf8prober import UTF8Prober
-from .sjisprober import SJISProber
-from .eucjpprober import EUCJPProber
-from .gb2312prober import GB2312Prober
-from .euckrprober import EUCKRProber
-from .cp949prober import CP949Prober
-from .big5prober import Big5Prober
-from .euctwprober import EUCTWProber
-
-
-class MBCSGroupProber(CharSetGroupProber):
-    def __init__(self, lang_filter=None):
-        super(MBCSGroupProber, self).__init__(lang_filter=lang_filter)
-        self.probers = [
-            UTF8Prober(),
-            SJISProber(),
-            EUCJPProber(),
-            GB2312Prober(),
-            EUCKRProber(),
-            CP949Prober(),
-            Big5Prober(),
-            EUCTWProber()
-        ]
-        self.reset()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/mbcssm.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/mbcssm.py
deleted file mode 100644
index 8360d0f..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/mbcssm.py
+++ /dev/null
@@ -1,572 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is mozilla.org code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .enums import MachineState
-
-# BIG5
-
-BIG5_CLS = (
-    1,1,1,1,1,1,1,1,  # 00 - 07    #allow 0x00 as legal value
-    1,1,1,1,1,1,0,0,  # 08 - 0f
-    1,1,1,1,1,1,1,1,  # 10 - 17
-    1,1,1,0,1,1,1,1,  # 18 - 1f
-    1,1,1,1,1,1,1,1,  # 20 - 27
-    1,1,1,1,1,1,1,1,  # 28 - 2f
-    1,1,1,1,1,1,1,1,  # 30 - 37
-    1,1,1,1,1,1,1,1,  # 38 - 3f
-    2,2,2,2,2,2,2,2,  # 40 - 47
-    2,2,2,2,2,2,2,2,  # 48 - 4f
-    2,2,2,2,2,2,2,2,  # 50 - 57
-    2,2,2,2,2,2,2,2,  # 58 - 5f
-    2,2,2,2,2,2,2,2,  # 60 - 67
-    2,2,2,2,2,2,2,2,  # 68 - 6f
-    2,2,2,2,2,2,2,2,  # 70 - 77
-    2,2,2,2,2,2,2,1,  # 78 - 7f
-    4,4,4,4,4,4,4,4,  # 80 - 87
-    4,4,4,4,4,4,4,4,  # 88 - 8f
-    4,4,4,4,4,4,4,4,  # 90 - 97
-    4,4,4,4,4,4,4,4,  # 98 - 9f
-    4,3,3,3,3,3,3,3,  # a0 - a7
-    3,3,3,3,3,3,3,3,  # a8 - af
-    3,3,3,3,3,3,3,3,  # b0 - b7
-    3,3,3,3,3,3,3,3,  # b8 - bf
-    3,3,3,3,3,3,3,3,  # c0 - c7
-    3,3,3,3,3,3,3,3,  # c8 - cf
-    3,3,3,3,3,3,3,3,  # d0 - d7
-    3,3,3,3,3,3,3,3,  # d8 - df
-    3,3,3,3,3,3,3,3,  # e0 - e7
-    3,3,3,3,3,3,3,3,  # e8 - ef
-    3,3,3,3,3,3,3,3,  # f0 - f7
-    3,3,3,3,3,3,3,0  # f8 - ff
-)
-
-BIG5_ST = (
-    MachineState.ERROR,MachineState.START,MachineState.START,     3,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#00-07
-    MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,#08-0f
-    MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START#10-17
-)
-
-BIG5_CHAR_LEN_TABLE = (0, 1, 1, 2, 0)
-
-BIG5_SM_MODEL = {'class_table': BIG5_CLS,
-                 'class_factor': 5,
-                 'state_table': BIG5_ST,
-                 'char_len_table': BIG5_CHAR_LEN_TABLE,
-                 'name': 'Big5'}
-
-# CP949
-
-CP949_CLS  = (
-    1,1,1,1,1,1,1,1, 1,1,1,1,1,1,0,0,  # 00 - 0f
-    1,1,1,1,1,1,1,1, 1,1,1,0,1,1,1,1,  # 10 - 1f
-    1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,  # 20 - 2f
-    1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,  # 30 - 3f
-    1,4,4,4,4,4,4,4, 4,4,4,4,4,4,4,4,  # 40 - 4f
-    4,4,5,5,5,5,5,5, 5,5,5,1,1,1,1,1,  # 50 - 5f
-    1,5,5,5,5,5,5,5, 5,5,5,5,5,5,5,5,  # 60 - 6f
-    5,5,5,5,5,5,5,5, 5,5,5,1,1,1,1,1,  # 70 - 7f
-    0,6,6,6,6,6,6,6, 6,6,6,6,6,6,6,6,  # 80 - 8f
-    6,6,6,6,6,6,6,6, 6,6,6,6,6,6,6,6,  # 90 - 9f
-    6,7,7,7,7,7,7,7, 7,7,7,7,7,8,8,8,  # a0 - af
-    7,7,7,7,7,7,7,7, 7,7,7,7,7,7,7,7,  # b0 - bf
-    7,7,7,7,7,7,9,2, 2,3,2,2,2,2,2,2,  # c0 - cf
-    2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,  # d0 - df
-    2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,  # e0 - ef
-    2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,0,  # f0 - ff
-)
-
-CP949_ST = (
-#cls=    0      1      2      3      4      5      6      7      8      9  # previous state =
-    MachineState.ERROR,MachineState.START,     3,MachineState.ERROR,MachineState.START,MachineState.START,     4,     5,MachineState.ERROR,     6, # MachineState.START
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR, # MachineState.ERROR
-    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME, # MachineState.ITS_ME
-    MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START, # 3
-    MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START, # 4
-    MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START, # 5
-    MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START, # 6
-)
-
-CP949_CHAR_LEN_TABLE = (0, 1, 2, 0, 1, 1, 2, 2, 0, 2)
-
-CP949_SM_MODEL = {'class_table': CP949_CLS,
-                  'class_factor': 10,
-                  'state_table': CP949_ST,
-                  'char_len_table': CP949_CHAR_LEN_TABLE,
-                  'name': 'CP949'}
-
-# EUC-JP
-
-EUCJP_CLS = (
-    4,4,4,4,4,4,4,4,  # 00 - 07
-    4,4,4,4,4,4,5,5,  # 08 - 0f
-    4,4,4,4,4,4,4,4,  # 10 - 17
-    4,4,4,5,4,4,4,4,  # 18 - 1f
-    4,4,4,4,4,4,4,4,  # 20 - 27
-    4,4,4,4,4,4,4,4,  # 28 - 2f
-    4,4,4,4,4,4,4,4,  # 30 - 37
-    4,4,4,4,4,4,4,4,  # 38 - 3f
-    4,4,4,4,4,4,4,4,  # 40 - 47
-    4,4,4,4,4,4,4,4,  # 48 - 4f
-    4,4,4,4,4,4,4,4,  # 50 - 57
-    4,4,4,4,4,4,4,4,  # 58 - 5f
-    4,4,4,4,4,4,4,4,  # 60 - 67
-    4,4,4,4,4,4,4,4,  # 68 - 6f
-    4,4,4,4,4,4,4,4,  # 70 - 77
-    4,4,4,4,4,4,4,4,  # 78 - 7f
-    5,5,5,5,5,5,5,5,  # 80 - 87
-    5,5,5,5,5,5,1,3,  # 88 - 8f
-    5,5,5,5,5,5,5,5,  # 90 - 97
-    5,5,5,5,5,5,5,5,  # 98 - 9f
-    5,2,2,2,2,2,2,2,  # a0 - a7
-    2,2,2,2,2,2,2,2,  # a8 - af
-    2,2,2,2,2,2,2,2,  # b0 - b7
-    2,2,2,2,2,2,2,2,  # b8 - bf
-    2,2,2,2,2,2,2,2,  # c0 - c7
-    2,2,2,2,2,2,2,2,  # c8 - cf
-    2,2,2,2,2,2,2,2,  # d0 - d7
-    2,2,2,2,2,2,2,2,  # d8 - df
-    0,0,0,0,0,0,0,0,  # e0 - e7
-    0,0,0,0,0,0,0,0,  # e8 - ef
-    0,0,0,0,0,0,0,0,  # f0 - f7
-    0,0,0,0,0,0,0,5  # f8 - ff
-)
-
-EUCJP_ST = (
-          3,     4,     3,     5,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#00-07
-     MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
-     MachineState.ITS_ME,MachineState.ITS_ME,MachineState.START,MachineState.ERROR,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#10-17
-     MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     3,MachineState.ERROR,#18-1f
-          3,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START#20-27
-)
-
-EUCJP_CHAR_LEN_TABLE = (2, 2, 2, 3, 1, 0)
-
-EUCJP_SM_MODEL = {'class_table': EUCJP_CLS,
-                  'class_factor': 6,
-                  'state_table': EUCJP_ST,
-                  'char_len_table': EUCJP_CHAR_LEN_TABLE,
-                  'name': 'EUC-JP'}
-
-# EUC-KR
-
-EUCKR_CLS  = (
-    1,1,1,1,1,1,1,1,  # 00 - 07
-    1,1,1,1,1,1,0,0,  # 08 - 0f
-    1,1,1,1,1,1,1,1,  # 10 - 17
-    1,1,1,0,1,1,1,1,  # 18 - 1f
-    1,1,1,1,1,1,1,1,  # 20 - 27
-    1,1,1,1,1,1,1,1,  # 28 - 2f
-    1,1,1,1,1,1,1,1,  # 30 - 37
-    1,1,1,1,1,1,1,1,  # 38 - 3f
-    1,1,1,1,1,1,1,1,  # 40 - 47
-    1,1,1,1,1,1,1,1,  # 48 - 4f
-    1,1,1,1,1,1,1,1,  # 50 - 57
-    1,1,1,1,1,1,1,1,  # 58 - 5f
-    1,1,1,1,1,1,1,1,  # 60 - 67
-    1,1,1,1,1,1,1,1,  # 68 - 6f
-    1,1,1,1,1,1,1,1,  # 70 - 77
-    1,1,1,1,1,1,1,1,  # 78 - 7f
-    0,0,0,0,0,0,0,0,  # 80 - 87
-    0,0,0,0,0,0,0,0,  # 88 - 8f
-    0,0,0,0,0,0,0,0,  # 90 - 97
-    0,0,0,0,0,0,0,0,  # 98 - 9f
-    0,2,2,2,2,2,2,2,  # a0 - a7
-    2,2,2,2,2,3,3,3,  # a8 - af
-    2,2,2,2,2,2,2,2,  # b0 - b7
-    2,2,2,2,2,2,2,2,  # b8 - bf
-    2,2,2,2,2,2,2,2,  # c0 - c7
-    2,3,2,2,2,2,2,2,  # c8 - cf
-    2,2,2,2,2,2,2,2,  # d0 - d7
-    2,2,2,2,2,2,2,2,  # d8 - df
-    2,2,2,2,2,2,2,2,  # e0 - e7
-    2,2,2,2,2,2,2,2,  # e8 - ef
-    2,2,2,2,2,2,2,2,  # f0 - f7
-    2,2,2,2,2,2,2,0   # f8 - ff
-)
-
-EUCKR_ST = (
-    MachineState.ERROR,MachineState.START,     3,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#00-07
-    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START #08-0f
-)
-
-EUCKR_CHAR_LEN_TABLE = (0, 1, 2, 0)
-
-EUCKR_SM_MODEL = {'class_table': EUCKR_CLS,
-                'class_factor': 4,
-                'state_table': EUCKR_ST,
-                'char_len_table': EUCKR_CHAR_LEN_TABLE,
-                'name': 'EUC-KR'}
-
-# EUC-TW
-
-EUCTW_CLS = (
-    2,2,2,2,2,2,2,2,  # 00 - 07
-    2,2,2,2,2,2,0,0,  # 08 - 0f
-    2,2,2,2,2,2,2,2,  # 10 - 17
-    2,2,2,0,2,2,2,2,  # 18 - 1f
-    2,2,2,2,2,2,2,2,  # 20 - 27
-    2,2,2,2,2,2,2,2,  # 28 - 2f
-    2,2,2,2,2,2,2,2,  # 30 - 37
-    2,2,2,2,2,2,2,2,  # 38 - 3f
-    2,2,2,2,2,2,2,2,  # 40 - 47
-    2,2,2,2,2,2,2,2,  # 48 - 4f
-    2,2,2,2,2,2,2,2,  # 50 - 57
-    2,2,2,2,2,2,2,2,  # 58 - 5f
-    2,2,2,2,2,2,2,2,  # 60 - 67
-    2,2,2,2,2,2,2,2,  # 68 - 6f
-    2,2,2,2,2,2,2,2,  # 70 - 77
-    2,2,2,2,2,2,2,2,  # 78 - 7f
-    0,0,0,0,0,0,0,0,  # 80 - 87
-    0,0,0,0,0,0,6,0,  # 88 - 8f
-    0,0,0,0,0,0,0,0,  # 90 - 97
-    0,0,0,0,0,0,0,0,  # 98 - 9f
-    0,3,4,4,4,4,4,4,  # a0 - a7
-    5,5,1,1,1,1,1,1,  # a8 - af
-    1,1,1,1,1,1,1,1,  # b0 - b7
-    1,1,1,1,1,1,1,1,  # b8 - bf
-    1,1,3,1,3,3,3,3,  # c0 - c7
-    3,3,3,3,3,3,3,3,  # c8 - cf
-    3,3,3,3,3,3,3,3,  # d0 - d7
-    3,3,3,3,3,3,3,3,  # d8 - df
-    3,3,3,3,3,3,3,3,  # e0 - e7
-    3,3,3,3,3,3,3,3,  # e8 - ef
-    3,3,3,3,3,3,3,3,  # f0 - f7
-    3,3,3,3,3,3,3,0   # f8 - ff
-)
-
-EUCTW_ST = (
-    MachineState.ERROR,MachineState.ERROR,MachineState.START,     3,     3,     3,     4,MachineState.ERROR,#00-07
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
-    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.START,MachineState.ERROR,#10-17
-    MachineState.START,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#18-1f
-         5,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.ERROR,MachineState.START,MachineState.START,#20-27
-    MachineState.START,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START #28-2f
-)
-
-EUCTW_CHAR_LEN_TABLE = (0, 0, 1, 2, 2, 2, 3)
-
-EUCTW_SM_MODEL = {'class_table': EUCTW_CLS,
-                'class_factor': 7,
-                'state_table': EUCTW_ST,
-                'char_len_table': EUCTW_CHAR_LEN_TABLE,
-                'name': 'x-euc-tw'}
-
-# GB2312
-
-GB2312_CLS = (
-    1,1,1,1,1,1,1,1,  # 00 - 07
-    1,1,1,1,1,1,0,0,  # 08 - 0f
-    1,1,1,1,1,1,1,1,  # 10 - 17
-    1,1,1,0,1,1,1,1,  # 18 - 1f
-    1,1,1,1,1,1,1,1,  # 20 - 27
-    1,1,1,1,1,1,1,1,  # 28 - 2f
-    3,3,3,3,3,3,3,3,  # 30 - 37
-    3,3,1,1,1,1,1,1,  # 38 - 3f
-    2,2,2,2,2,2,2,2,  # 40 - 47
-    2,2,2,2,2,2,2,2,  # 48 - 4f
-    2,2,2,2,2,2,2,2,  # 50 - 57
-    2,2,2,2,2,2,2,2,  # 58 - 5f
-    2,2,2,2,2,2,2,2,  # 60 - 67
-    2,2,2,2,2,2,2,2,  # 68 - 6f
-    2,2,2,2,2,2,2,2,  # 70 - 77
-    2,2,2,2,2,2,2,4,  # 78 - 7f
-    5,6,6,6,6,6,6,6,  # 80 - 87
-    6,6,6,6,6,6,6,6,  # 88 - 8f
-    6,6,6,6,6,6,6,6,  # 90 - 97
-    6,6,6,6,6,6,6,6,  # 98 - 9f
-    6,6,6,6,6,6,6,6,  # a0 - a7
-    6,6,6,6,6,6,6,6,  # a8 - af
-    6,6,6,6,6,6,6,6,  # b0 - b7
-    6,6,6,6,6,6,6,6,  # b8 - bf
-    6,6,6,6,6,6,6,6,  # c0 - c7
-    6,6,6,6,6,6,6,6,  # c8 - cf
-    6,6,6,6,6,6,6,6,  # d0 - d7
-    6,6,6,6,6,6,6,6,  # d8 - df
-    6,6,6,6,6,6,6,6,  # e0 - e7
-    6,6,6,6,6,6,6,6,  # e8 - ef
-    6,6,6,6,6,6,6,6,  # f0 - f7
-    6,6,6,6,6,6,6,0   # f8 - ff
-)
-
-GB2312_ST = (
-    MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,     3,MachineState.ERROR,#00-07
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
-    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.START,#10-17
-         4,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#18-1f
-    MachineState.ERROR,MachineState.ERROR,     5,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,#20-27
-    MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START #28-2f
-)
-
-# To be accurate, the length of class 6 can be either 2 or 4.
-# But it is not necessary to discriminate between the two since
-# it is used for frequency analysis only, and we are validating
-# each code range there as well. So it is safe to set it to be
-# 2 here.
-GB2312_CHAR_LEN_TABLE = (0, 1, 1, 1, 1, 1, 2)
-
-GB2312_SM_MODEL = {'class_table': GB2312_CLS,
-                   'class_factor': 7,
-                   'state_table': GB2312_ST,
-                   'char_len_table': GB2312_CHAR_LEN_TABLE,
-                   'name': 'GB2312'}
-
-# Shift_JIS
-
-SJIS_CLS = (
-    1,1,1,1,1,1,1,1,  # 00 - 07
-    1,1,1,1,1,1,0,0,  # 08 - 0f
-    1,1,1,1,1,1,1,1,  # 10 - 17
-    1,1,1,0,1,1,1,1,  # 18 - 1f
-    1,1,1,1,1,1,1,1,  # 20 - 27
-    1,1,1,1,1,1,1,1,  # 28 - 2f
-    1,1,1,1,1,1,1,1,  # 30 - 37
-    1,1,1,1,1,1,1,1,  # 38 - 3f
-    2,2,2,2,2,2,2,2,  # 40 - 47
-    2,2,2,2,2,2,2,2,  # 48 - 4f
-    2,2,2,2,2,2,2,2,  # 50 - 57
-    2,2,2,2,2,2,2,2,  # 58 - 5f
-    2,2,2,2,2,2,2,2,  # 60 - 67
-    2,2,2,2,2,2,2,2,  # 68 - 6f
-    2,2,2,2,2,2,2,2,  # 70 - 77
-    2,2,2,2,2,2,2,1,  # 78 - 7f
-    3,3,3,3,3,2,2,3,  # 80 - 87
-    3,3,3,3,3,3,3,3,  # 88 - 8f
-    3,3,3,3,3,3,3,3,  # 90 - 97
-    3,3,3,3,3,3,3,3,  # 98 - 9f
-    #0xa0 is illegal in sjis encoding, but some pages does
-    #contain such byte. We need to be more error forgiven.
-    2,2,2,2,2,2,2,2,  # a0 - a7
-    2,2,2,2,2,2,2,2,  # a8 - af
-    2,2,2,2,2,2,2,2,  # b0 - b7
-    2,2,2,2,2,2,2,2,  # b8 - bf
-    2,2,2,2,2,2,2,2,  # c0 - c7
-    2,2,2,2,2,2,2,2,  # c8 - cf
-    2,2,2,2,2,2,2,2,  # d0 - d7
-    2,2,2,2,2,2,2,2,  # d8 - df
-    3,3,3,3,3,3,3,3,  # e0 - e7
-    3,3,3,3,3,4,4,4,  # e8 - ef
-    3,3,3,3,3,3,3,3,  # f0 - f7
-    3,3,3,3,3,0,0,0)  # f8 - ff
-
-
-SJIS_ST = (
-    MachineState.ERROR,MachineState.START,MachineState.START,     3,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#00-07
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
-    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START #10-17
-)
-
-SJIS_CHAR_LEN_TABLE = (0, 1, 1, 2, 0, 0)
-
-SJIS_SM_MODEL = {'class_table': SJIS_CLS,
-               'class_factor': 6,
-               'state_table': SJIS_ST,
-               'char_len_table': SJIS_CHAR_LEN_TABLE,
-               'name': 'Shift_JIS'}
-
-# UCS2-BE
-
-UCS2BE_CLS = (
-    0,0,0,0,0,0,0,0,  # 00 - 07
-    0,0,1,0,0,2,0,0,  # 08 - 0f
-    0,0,0,0,0,0,0,0,  # 10 - 17
-    0,0,0,3,0,0,0,0,  # 18 - 1f
-    0,0,0,0,0,0,0,0,  # 20 - 27
-    0,3,3,3,3,3,0,0,  # 28 - 2f
-    0,0,0,0,0,0,0,0,  # 30 - 37
-    0,0,0,0,0,0,0,0,  # 38 - 3f
-    0,0,0,0,0,0,0,0,  # 40 - 47
-    0,0,0,0,0,0,0,0,  # 48 - 4f
-    0,0,0,0,0,0,0,0,  # 50 - 57
-    0,0,0,0,0,0,0,0,  # 58 - 5f
-    0,0,0,0,0,0,0,0,  # 60 - 67
-    0,0,0,0,0,0,0,0,  # 68 - 6f
-    0,0,0,0,0,0,0,0,  # 70 - 77
-    0,0,0,0,0,0,0,0,  # 78 - 7f
-    0,0,0,0,0,0,0,0,  # 80 - 87
-    0,0,0,0,0,0,0,0,  # 88 - 8f
-    0,0,0,0,0,0,0,0,  # 90 - 97
-    0,0,0,0,0,0,0,0,  # 98 - 9f
-    0,0,0,0,0,0,0,0,  # a0 - a7
-    0,0,0,0,0,0,0,0,  # a8 - af
-    0,0,0,0,0,0,0,0,  # b0 - b7
-    0,0,0,0,0,0,0,0,  # b8 - bf
-    0,0,0,0,0,0,0,0,  # c0 - c7
-    0,0,0,0,0,0,0,0,  # c8 - cf
-    0,0,0,0,0,0,0,0,  # d0 - d7
-    0,0,0,0,0,0,0,0,  # d8 - df
-    0,0,0,0,0,0,0,0,  # e0 - e7
-    0,0,0,0,0,0,0,0,  # e8 - ef
-    0,0,0,0,0,0,0,0,  # f0 - f7
-    0,0,0,0,0,0,4,5   # f8 - ff
-)
-
-UCS2BE_ST  = (
-          5,     7,     7,MachineState.ERROR,     4,     3,MachineState.ERROR,MachineState.ERROR,#00-07
-     MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
-     MachineState.ITS_ME,MachineState.ITS_ME,     6,     6,     6,     6,MachineState.ERROR,MachineState.ERROR,#10-17
-          6,     6,     6,     6,     6,MachineState.ITS_ME,     6,     6,#18-1f
-          6,     6,     6,     6,     5,     7,     7,MachineState.ERROR,#20-27
-          5,     8,     6,     6,MachineState.ERROR,     6,     6,     6,#28-2f
-          6,     6,     6,     6,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START #30-37
-)
-
-UCS2BE_CHAR_LEN_TABLE = (2, 2, 2, 0, 2, 2)
-
-UCS2BE_SM_MODEL = {'class_table': UCS2BE_CLS,
-                   'class_factor': 6,
-                   'state_table': UCS2BE_ST,
-                   'char_len_table': UCS2BE_CHAR_LEN_TABLE,
-                   'name': 'UTF-16BE'}
-
-# UCS2-LE
-
-UCS2LE_CLS = (
-    0,0,0,0,0,0,0,0,  # 00 - 07
-    0,0,1,0,0,2,0,0,  # 08 - 0f
-    0,0,0,0,0,0,0,0,  # 10 - 17
-    0,0,0,3,0,0,0,0,  # 18 - 1f
-    0,0,0,0,0,0,0,0,  # 20 - 27
-    0,3,3,3,3,3,0,0,  # 28 - 2f
-    0,0,0,0,0,0,0,0,  # 30 - 37
-    0,0,0,0,0,0,0,0,  # 38 - 3f
-    0,0,0,0,0,0,0,0,  # 40 - 47
-    0,0,0,0,0,0,0,0,  # 48 - 4f
-    0,0,0,0,0,0,0,0,  # 50 - 57
-    0,0,0,0,0,0,0,0,  # 58 - 5f
-    0,0,0,0,0,0,0,0,  # 60 - 67
-    0,0,0,0,0,0,0,0,  # 68 - 6f
-    0,0,0,0,0,0,0,0,  # 70 - 77
-    0,0,0,0,0,0,0,0,  # 78 - 7f
-    0,0,0,0,0,0,0,0,  # 80 - 87
-    0,0,0,0,0,0,0,0,  # 88 - 8f
-    0,0,0,0,0,0,0,0,  # 90 - 97
-    0,0,0,0,0,0,0,0,  # 98 - 9f
-    0,0,0,0,0,0,0,0,  # a0 - a7
-    0,0,0,0,0,0,0,0,  # a8 - af
-    0,0,0,0,0,0,0,0,  # b0 - b7
-    0,0,0,0,0,0,0,0,  # b8 - bf
-    0,0,0,0,0,0,0,0,  # c0 - c7
-    0,0,0,0,0,0,0,0,  # c8 - cf
-    0,0,0,0,0,0,0,0,  # d0 - d7
-    0,0,0,0,0,0,0,0,  # d8 - df
-    0,0,0,0,0,0,0,0,  # e0 - e7
-    0,0,0,0,0,0,0,0,  # e8 - ef
-    0,0,0,0,0,0,0,0,  # f0 - f7
-    0,0,0,0,0,0,4,5   # f8 - ff
-)
-
-UCS2LE_ST = (
-          6,     6,     7,     6,     4,     3,MachineState.ERROR,MachineState.ERROR,#00-07
-     MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
-     MachineState.ITS_ME,MachineState.ITS_ME,     5,     5,     5,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,#10-17
-          5,     5,     5,MachineState.ERROR,     5,MachineState.ERROR,     6,     6,#18-1f
-          7,     6,     8,     8,     5,     5,     5,MachineState.ERROR,#20-27
-          5,     5,     5,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     5,     5,#28-2f
-          5,     5,     5,MachineState.ERROR,     5,MachineState.ERROR,MachineState.START,MachineState.START #30-37
-)
-
-UCS2LE_CHAR_LEN_TABLE = (2, 2, 2, 2, 2, 2)
-
-UCS2LE_SM_MODEL = {'class_table': UCS2LE_CLS,
-                 'class_factor': 6,
-                 'state_table': UCS2LE_ST,
-                 'char_len_table': UCS2LE_CHAR_LEN_TABLE,
-                 'name': 'UTF-16LE'}
-
-# UTF-8
-
-UTF8_CLS = (
-    1,1,1,1,1,1,1,1,  # 00 - 07  #allow 0x00 as a legal value
-    1,1,1,1,1,1,0,0,  # 08 - 0f
-    1,1,1,1,1,1,1,1,  # 10 - 17
-    1,1,1,0,1,1,1,1,  # 18 - 1f
-    1,1,1,1,1,1,1,1,  # 20 - 27
-    1,1,1,1,1,1,1,1,  # 28 - 2f
-    1,1,1,1,1,1,1,1,  # 30 - 37
-    1,1,1,1,1,1,1,1,  # 38 - 3f
-    1,1,1,1,1,1,1,1,  # 40 - 47
-    1,1,1,1,1,1,1,1,  # 48 - 4f
-    1,1,1,1,1,1,1,1,  # 50 - 57
-    1,1,1,1,1,1,1,1,  # 58 - 5f
-    1,1,1,1,1,1,1,1,  # 60 - 67
-    1,1,1,1,1,1,1,1,  # 68 - 6f
-    1,1,1,1,1,1,1,1,  # 70 - 77
-    1,1,1,1,1,1,1,1,  # 78 - 7f
-    2,2,2,2,3,3,3,3,  # 80 - 87
-    4,4,4,4,4,4,4,4,  # 88 - 8f
-    4,4,4,4,4,4,4,4,  # 90 - 97
-    4,4,4,4,4,4,4,4,  # 98 - 9f
-    5,5,5,5,5,5,5,5,  # a0 - a7
-    5,5,5,5,5,5,5,5,  # a8 - af
-    5,5,5,5,5,5,5,5,  # b0 - b7
-    5,5,5,5,5,5,5,5,  # b8 - bf
-    0,0,6,6,6,6,6,6,  # c0 - c7
-    6,6,6,6,6,6,6,6,  # c8 - cf
-    6,6,6,6,6,6,6,6,  # d0 - d7
-    6,6,6,6,6,6,6,6,  # d8 - df
-    7,8,8,8,8,8,8,8,  # e0 - e7
-    8,8,8,8,8,9,8,8,  # e8 - ef
-    10,11,11,11,11,11,11,11,  # f0 - f7
-    12,13,13,13,14,15,0,0    # f8 - ff
-)
-
-UTF8_ST = (
-    MachineState.ERROR,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     12,   10,#00-07
-         9,     11,     8,     7,     6,     5,     4,    3,#08-0f
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#10-17
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#18-1f
-    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#20-27
-    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#28-2f
-    MachineState.ERROR,MachineState.ERROR,     5,     5,     5,     5,MachineState.ERROR,MachineState.ERROR,#30-37
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#38-3f
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     5,     5,     5,MachineState.ERROR,MachineState.ERROR,#40-47
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#48-4f
-    MachineState.ERROR,MachineState.ERROR,     7,     7,     7,     7,MachineState.ERROR,MachineState.ERROR,#50-57
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#58-5f
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     7,     7,MachineState.ERROR,MachineState.ERROR,#60-67
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#68-6f
-    MachineState.ERROR,MachineState.ERROR,     9,     9,     9,     9,MachineState.ERROR,MachineState.ERROR,#70-77
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#78-7f
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     9,MachineState.ERROR,MachineState.ERROR,#80-87
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#88-8f
-    MachineState.ERROR,MachineState.ERROR,    12,    12,    12,    12,MachineState.ERROR,MachineState.ERROR,#90-97
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#98-9f
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,    12,MachineState.ERROR,MachineState.ERROR,#a0-a7
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#a8-af
-    MachineState.ERROR,MachineState.ERROR,    12,    12,    12,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#b0-b7
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#b8-bf
-    MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,#c0-c7
-    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR #c8-cf
-)
-
-UTF8_CHAR_LEN_TABLE = (0, 1, 0, 0, 0, 0, 2, 3, 3, 3, 4, 4, 5, 5, 6, 6)
-
-UTF8_SM_MODEL = {'class_table': UTF8_CLS,
-                 'class_factor': 16,
-                 'state_table': UTF8_ST,
-                 'char_len_table': UTF8_CHAR_LEN_TABLE,
-                 'name': 'UTF-8'}
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/sbcharsetprober.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/sbcharsetprober.py
deleted file mode 100644
index 0adb51d..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/sbcharsetprober.py
+++ /dev/null
@@ -1,132 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Universal charset detector code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 2001
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#   Shy Shalom - original C code
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .charsetprober import CharSetProber
-from .enums import CharacterCategory, ProbingState, SequenceLikelihood
-
-
-class SingleByteCharSetProber(CharSetProber):
-    SAMPLE_SIZE = 64
-    SB_ENOUGH_REL_THRESHOLD = 1024  #  0.25 * SAMPLE_SIZE^2
-    POSITIVE_SHORTCUT_THRESHOLD = 0.95
-    NEGATIVE_SHORTCUT_THRESHOLD = 0.05
-
-    def __init__(self, model, reversed=False, name_prober=None):
-        super(SingleByteCharSetProber, self).__init__()
-        self._model = model
-        # TRUE if we need to reverse every pair in the model lookup
-        self._reversed = reversed
-        # Optional auxiliary prober for name decision
-        self._name_prober = name_prober
-        self._last_order = None
-        self._seq_counters = None
-        self._total_seqs = None
-        self._total_char = None
-        self._freq_char = None
-        self.reset()
-
-    def reset(self):
-        super(SingleByteCharSetProber, self).reset()
-        # char order of last character
-        self._last_order = 255
-        self._seq_counters = [0] * SequenceLikelihood.get_num_categories()
-        self._total_seqs = 0
-        self._total_char = 0
-        # characters that fall in our sampling range
-        self._freq_char = 0
-
-    @property
-    def charset_name(self):
-        if self._name_prober:
-            return self._name_prober.charset_name
-        else:
-            return self._model['charset_name']
-
-    @property
-    def language(self):
-        if self._name_prober:
-            return self._name_prober.language
-        else:
-            return self._model.get('language')
-
-    def feed(self, byte_str):
-        if not self._model['keep_english_letter']:
-            byte_str = self.filter_international_words(byte_str)
-        if not byte_str:
-            return self.state
-        char_to_order_map = self._model['char_to_order_map']
-        for i, c in enumerate(byte_str):
-            # XXX: Order is in range 1-64, so one would think we want 0-63 here,
-            #      but that leads to 27 more test failures than before.
-            order = char_to_order_map[c]
-            # XXX: This was SYMBOL_CAT_ORDER before, with a value of 250, but
-            #      CharacterCategory.SYMBOL is actually 253, so we use CONTROL
-            #      to make it closer to the original intent. The only difference
-            #      is whether or not we count digits and control characters for
-            #      _total_char purposes.
-            if order < CharacterCategory.CONTROL:
-                self._total_char += 1
-            if order < self.SAMPLE_SIZE:
-                self._freq_char += 1
-                if self._last_order < self.SAMPLE_SIZE:
-                    self._total_seqs += 1
-                    if not self._reversed:
-                        i = (self._last_order * self.SAMPLE_SIZE) + order
-                        model = self._model['precedence_matrix'][i]
-                    else:  # reverse the order of the letters in the lookup
-                        i = (order * self.SAMPLE_SIZE) + self._last_order
-                        model = self._model['precedence_matrix'][i]
-                    self._seq_counters[model] += 1
-            self._last_order = order
-
-        charset_name = self._model['charset_name']
-        if self.state == ProbingState.DETECTING:
-            if self._total_seqs > self.SB_ENOUGH_REL_THRESHOLD:
-                confidence = self.get_confidence()
-                if confidence > self.POSITIVE_SHORTCUT_THRESHOLD:
-                    self.logger.debug('%s confidence = %s, we have a winner',
-                                      charset_name, confidence)
-                    self._state = ProbingState.FOUND_IT
-                elif confidence < self.NEGATIVE_SHORTCUT_THRESHOLD:
-                    self.logger.debug('%s confidence = %s, below negative '
-                                      'shortcut threshhold %s', charset_name,
-                                      confidence,
-                                      self.NEGATIVE_SHORTCUT_THRESHOLD)
-                    self._state = ProbingState.NOT_ME
-
-        return self.state
-
-    def get_confidence(self):
-        r = 0.01
-        if self._total_seqs > 0:
-            r = ((1.0 * self._seq_counters[SequenceLikelihood.POSITIVE]) /
-                 self._total_seqs / self._model['typical_positive_ratio'])
-            r = r * self._freq_char / self._total_char
-            if r >= 1.0:
-                r = 0.99
-        return r
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/sbcsgroupprober.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/sbcsgroupprober.py
deleted file mode 100644
index 98e95dc..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/sbcsgroupprober.py
+++ /dev/null
@@ -1,73 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Universal charset detector code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 2001
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#   Shy Shalom - original C code
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .charsetgroupprober import CharSetGroupProber
-from .sbcharsetprober import SingleByteCharSetProber
-from .langcyrillicmodel import (Win1251CyrillicModel, Koi8rModel,
-                                Latin5CyrillicModel, MacCyrillicModel,
-                                Ibm866Model, Ibm855Model)
-from .langgreekmodel import Latin7GreekModel, Win1253GreekModel
-from .langbulgarianmodel import Latin5BulgarianModel, Win1251BulgarianModel
-# from .langhungarianmodel import Latin2HungarianModel, Win1250HungarianModel
-from .langthaimodel import TIS620ThaiModel
-from .langhebrewmodel import Win1255HebrewModel
-from .hebrewprober import HebrewProber
-from .langturkishmodel import Latin5TurkishModel
-
-
-class SBCSGroupProber(CharSetGroupProber):
-    def __init__(self):
-        super(SBCSGroupProber, self).__init__()
-        self.probers = [
-            SingleByteCharSetProber(Win1251CyrillicModel),
-            SingleByteCharSetProber(Koi8rModel),
-            SingleByteCharSetProber(Latin5CyrillicModel),
-            SingleByteCharSetProber(MacCyrillicModel),
-            SingleByteCharSetProber(Ibm866Model),
-            SingleByteCharSetProber(Ibm855Model),
-            SingleByteCharSetProber(Latin7GreekModel),
-            SingleByteCharSetProber(Win1253GreekModel),
-            SingleByteCharSetProber(Latin5BulgarianModel),
-            SingleByteCharSetProber(Win1251BulgarianModel),
-            # TODO: Restore Hungarian encodings (iso-8859-2 and windows-1250)
-            #       after we retrain model.
-            # SingleByteCharSetProber(Latin2HungarianModel),
-            # SingleByteCharSetProber(Win1250HungarianModel),
-            SingleByteCharSetProber(TIS620ThaiModel),
-            SingleByteCharSetProber(Latin5TurkishModel),
-        ]
-        hebrew_prober = HebrewProber()
-        logical_hebrew_prober = SingleByteCharSetProber(Win1255HebrewModel,
-                                                        False, hebrew_prober)
-        visual_hebrew_prober = SingleByteCharSetProber(Win1255HebrewModel, True,
-                                                       hebrew_prober)
-        hebrew_prober.set_model_probers(logical_hebrew_prober, visual_hebrew_prober)
-        self.probers.extend([hebrew_prober, logical_hebrew_prober,
-                             visual_hebrew_prober])
-
-        self.reset()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/sjisprober.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/sjisprober.py
deleted file mode 100644
index 9e29623..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/sjisprober.py
+++ /dev/null
@@ -1,92 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is mozilla.org code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .mbcharsetprober import MultiByteCharSetProber
-from .codingstatemachine import CodingStateMachine
-from .chardistribution import SJISDistributionAnalysis
-from .jpcntx import SJISContextAnalysis
-from .mbcssm import SJIS_SM_MODEL
-from .enums import ProbingState, MachineState
-
-
-class SJISProber(MultiByteCharSetProber):
-    def __init__(self):
-        super(SJISProber, self).__init__()
-        self.coding_sm = CodingStateMachine(SJIS_SM_MODEL)
-        self.distribution_analyzer = SJISDistributionAnalysis()
-        self.context_analyzer = SJISContextAnalysis()
-        self.reset()
-
-    def reset(self):
-        super(SJISProber, self).reset()
-        self.context_analyzer.reset()
-
-    @property
-    def charset_name(self):
-        return self.context_analyzer.charset_name
-
-    @property
-    def language(self):
-        return "Japanese"
-
-    def feed(self, byte_str):
-        for i in range(len(byte_str)):
-            coding_state = self.coding_sm.next_state(byte_str[i])
-            if coding_state == MachineState.ERROR:
-                self.logger.debug('%s %s prober hit error at byte %s',
-                                  self.charset_name, self.language, i)
-                self._state = ProbingState.NOT_ME
-                break
-            elif coding_state == MachineState.ITS_ME:
-                self._state = ProbingState.FOUND_IT
-                break
-            elif coding_state == MachineState.START:
-                char_len = self.coding_sm.get_current_charlen()
-                if i == 0:
-                    self._last_char[1] = byte_str[0]
-                    self.context_analyzer.feed(self._last_char[2 - char_len:],
-                                               char_len)
-                    self.distribution_analyzer.feed(self._last_char, char_len)
-                else:
-                    self.context_analyzer.feed(byte_str[i + 1 - char_len:i + 3
-                                                        - char_len], char_len)
-                    self.distribution_analyzer.feed(byte_str[i - 1:i + 1],
-                                                    char_len)
-
-        self._last_char[0] = byte_str[-1]
-
-        if self.state == ProbingState.DETECTING:
-            if (self.context_analyzer.got_enough_data() and
-               (self.get_confidence() > self.SHORTCUT_THRESHOLD)):
-                self._state = ProbingState.FOUND_IT
-
-        return self.state
-
-    def get_confidence(self):
-        context_conf = self.context_analyzer.get_confidence()
-        distrib_conf = self.distribution_analyzer.get_confidence()
-        return max(context_conf, distrib_conf)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/universaldetector.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/universaldetector.py
deleted file mode 100644
index 7b4e92d..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/universaldetector.py
+++ /dev/null
@@ -1,286 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is Mozilla Universal charset detector code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 2001
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#   Shy Shalom - original C code
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-"""
-Module containing the UniversalDetector detector class, which is the primary
-class a user of ``chardet`` should use.
-
-:author: Mark Pilgrim (initial port to Python)
-:author: Shy Shalom (original C code)
-:author: Dan Blanchard (major refactoring for 3.0)
-:author: Ian Cordasco
-"""
-
-
-import codecs
-import logging
-import re
-
-from .charsetgroupprober import CharSetGroupProber
-from .enums import InputState, LanguageFilter, ProbingState
-from .escprober import EscCharSetProber
-from .latin1prober import Latin1Prober
-from .mbcsgroupprober import MBCSGroupProber
-from .sbcsgroupprober import SBCSGroupProber
-
-
-class UniversalDetector(object):
-    """
-    The ``UniversalDetector`` class underlies the ``chardet.detect`` function
-    and coordinates all of the different charset probers.
-
-    To get a ``dict`` containing an encoding and its confidence, you can simply
-    run:
-
-    .. code::
-
-            u = UniversalDetector()
-            u.feed(some_bytes)
-            u.close()
-            detected = u.result
-
-    """
-
-    MINIMUM_THRESHOLD = 0.20
-    HIGH_BYTE_DETECTOR = re.compile(b'[\x80-\xFF]')
-    ESC_DETECTOR = re.compile(b'(\033|~{)')
-    WIN_BYTE_DETECTOR = re.compile(b'[\x80-\x9F]')
-    ISO_WIN_MAP = {'iso-8859-1': 'Windows-1252',
-                   'iso-8859-2': 'Windows-1250',
-                   'iso-8859-5': 'Windows-1251',
-                   'iso-8859-6': 'Windows-1256',
-                   'iso-8859-7': 'Windows-1253',
-                   'iso-8859-8': 'Windows-1255',
-                   'iso-8859-9': 'Windows-1254',
-                   'iso-8859-13': 'Windows-1257'}
-
-    def __init__(self, lang_filter=LanguageFilter.ALL):
-        self._esc_charset_prober = None
-        self._charset_probers = []
-        self.result = None
-        self.done = None
-        self._got_data = None
-        self._input_state = None
-        self._last_char = None
-        self.lang_filter = lang_filter
-        self.logger = logging.getLogger(__name__)
-        self._has_win_bytes = None
-        self.reset()
-
-    def reset(self):
-        """
-        Reset the UniversalDetector and all of its probers back to their
-        initial states.  This is called by ``__init__``, so you only need to
-        call this directly in between analyses of different documents.
-        """
-        self.result = {'encoding': None, 'confidence': 0.0, 'language': None}
-        self.done = False
-        self._got_data = False
-        self._has_win_bytes = False
-        self._input_state = InputState.PURE_ASCII
-        self._last_char = b''
-        if self._esc_charset_prober:
-            self._esc_charset_prober.reset()
-        for prober in self._charset_probers:
-            prober.reset()
-
-    def feed(self, byte_str):
-        """
-        Takes a chunk of a document and feeds it through all of the relevant
-        charset probers.
-
-        After calling ``feed``, you can check the value of the ``done``
-        attribute to see if you need to continue feeding the
-        ``UniversalDetector`` more data, or if it has made a prediction
-        (in the ``result`` attribute).
-
-        .. note::
-           You should always call ``close`` when you're done feeding in your
-           document if ``done`` is not already ``True``.
-        """
-        if self.done:
-            return
-
-        if not len(byte_str):
-            return
-
-        if not isinstance(byte_str, bytearray):
-            byte_str = bytearray(byte_str)
-
-        # First check for known BOMs, since these are guaranteed to be correct
-        if not self._got_data:
-            # If the data starts with BOM, we know it is UTF
-            if byte_str.startswith(codecs.BOM_UTF8):
-                # EF BB BF  UTF-8 with BOM
-                self.result = {'encoding': "UTF-8-SIG",
-                               'confidence': 1.0,
-                               'language': ''}
-            elif byte_str.startswith((codecs.BOM_UTF32_LE,
-                                      codecs.BOM_UTF32_BE)):
-                # FF FE 00 00  UTF-32, little-endian BOM
-                # 00 00 FE FF  UTF-32, big-endian BOM
-                self.result = {'encoding': "UTF-32",
-                               'confidence': 1.0,
-                               'language': ''}
-            elif byte_str.startswith(b'\xFE\xFF\x00\x00'):
-                # FE FF 00 00  UCS-4, unusual octet order BOM (3412)
-                self.result = {'encoding': "X-ISO-10646-UCS-4-3412",
-                               'confidence': 1.0,
-                               'language': ''}
-            elif byte_str.startswith(b'\x00\x00\xFF\xFE'):
-                # 00 00 FF FE  UCS-4, unusual octet order BOM (2143)
-                self.result = {'encoding': "X-ISO-10646-UCS-4-2143",
-                               'confidence': 1.0,
-                               'language': ''}
-            elif byte_str.startswith((codecs.BOM_LE, codecs.BOM_BE)):
-                # FF FE  UTF-16, little endian BOM
-                # FE FF  UTF-16, big endian BOM
-                self.result = {'encoding': "UTF-16",
-                               'confidence': 1.0,
-                               'language': ''}
-
-            self._got_data = True
-            if self.result['encoding'] is not None:
-                self.done = True
-                return
-
-        # If none of those matched and we've only see ASCII so far, check
-        # for high bytes and escape sequences
-        if self._input_state == InputState.PURE_ASCII:
-            if self.HIGH_BYTE_DETECTOR.search(byte_str):
-                self._input_state = InputState.HIGH_BYTE
-            elif self._input_state == InputState.PURE_ASCII and \
-                    self.ESC_DETECTOR.search(self._last_char + byte_str):
-                self._input_state = InputState.ESC_ASCII
-
-        self._last_char = byte_str[-1:]
-
-        # If we've seen escape sequences, use the EscCharSetProber, which
-        # uses a simple state machine to check for known escape sequences in
-        # HZ and ISO-2022 encodings, since those are the only encodings that
-        # use such sequences.
-        if self._input_state == InputState.ESC_ASCII:
-            if not self._esc_charset_prober:
-                self._esc_charset_prober = EscCharSetProber(self.lang_filter)
-            if self._esc_charset_prober.feed(byte_str) == ProbingState.FOUND_IT:
-                self.result = {'encoding':
-                               self._esc_charset_prober.charset_name,
-                               'confidence':
-                               self._esc_charset_prober.get_confidence(),
-                               'language':
-                               self._esc_charset_prober.language}
-                self.done = True
-        # If we've seen high bytes (i.e., those with values greater than 127),
-        # we need to do more complicated checks using all our multi-byte and
-        # single-byte probers that are left.  The single-byte probers
-        # use character bigram distributions to determine the encoding, whereas
-        # the multi-byte probers use a combination of character unigram and
-        # bigram distributions.
-        elif self._input_state == InputState.HIGH_BYTE:
-            if not self._charset_probers:
-                self._charset_probers = [MBCSGroupProber(self.lang_filter)]
-                # If we're checking non-CJK encodings, use single-byte prober
-                if self.lang_filter & LanguageFilter.NON_CJK:
-                    self._charset_probers.append(SBCSGroupProber())
-                self._charset_probers.append(Latin1Prober())
-            for prober in self._charset_probers:
-                if prober.feed(byte_str) == ProbingState.FOUND_IT:
-                    self.result = {'encoding': prober.charset_name,
-                                   'confidence': prober.get_confidence(),
-                                   'language': prober.language}
-                    self.done = True
-                    break
-            if self.WIN_BYTE_DETECTOR.search(byte_str):
-                self._has_win_bytes = True
-
-    def close(self):
-        """
-        Stop analyzing the current document and come up with a final
-        prediction.
-
-        :returns:  The ``result`` attribute, a ``dict`` with the keys
-                   `encoding`, `confidence`, and `language`.
-        """
-        # Don't bother with checks if we're already done
-        if self.done:
-            return self.result
-        self.done = True
-
-        if not self._got_data:
-            self.logger.debug('no data received!')
-
-        # Default to ASCII if it is all we've seen so far
-        elif self._input_state == InputState.PURE_ASCII:
-            self.result = {'encoding': 'ascii',
-                           'confidence': 1.0,
-                           'language': ''}
-
-        # If we have seen non-ASCII, return the best that met MINIMUM_THRESHOLD
-        elif self._input_state == InputState.HIGH_BYTE:
-            prober_confidence = None
-            max_prober_confidence = 0.0
-            max_prober = None
-            for prober in self._charset_probers:
-                if not prober:
-                    continue
-                prober_confidence = prober.get_confidence()
-                if prober_confidence > max_prober_confidence:
-                    max_prober_confidence = prober_confidence
-                    max_prober = prober
-            if max_prober and (max_prober_confidence > self.MINIMUM_THRESHOLD):
-                charset_name = max_prober.charset_name
-                lower_charset_name = max_prober.charset_name.lower()
-                confidence = max_prober.get_confidence()
-                # Use Windows encoding name instead of ISO-8859 if we saw any
-                # extra Windows-specific bytes
-                if lower_charset_name.startswith('iso-8859'):
-                    if self._has_win_bytes:
-                        charset_name = self.ISO_WIN_MAP.get(lower_charset_name,
-                                                            charset_name)
-                self.result = {'encoding': charset_name,
-                               'confidence': confidence,
-                               'language': max_prober.language}
-
-        # Log all prober confidences if none met MINIMUM_THRESHOLD
-        if self.logger.getEffectiveLevel() == logging.DEBUG:
-            if self.result['encoding'] is None:
-                self.logger.debug('no probers hit minimum threshold')
-                for group_prober in self._charset_probers:
-                    if not group_prober:
-                        continue
-                    if isinstance(group_prober, CharSetGroupProber):
-                        for prober in group_prober.probers:
-                            self.logger.debug('%s %s confidence = %s',
-                                              prober.charset_name,
-                                              prober.language,
-                                              prober.get_confidence())
-                    else:
-                        self.logger.debug('%s %s confidence = %s',
-                                          prober.charset_name,
-                                          prober.language,
-                                          prober.get_confidence())
-        return self.result
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/utf8prober.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/utf8prober.py
deleted file mode 100644
index 6c3196c..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/utf8prober.py
+++ /dev/null
@@ -1,82 +0,0 @@
-######################## BEGIN LICENSE BLOCK ########################
-# The Original Code is mozilla.org code.
-#
-# The Initial Developer of the Original Code is
-# Netscape Communications Corporation.
-# Portions created by the Initial Developer are Copyright (C) 1998
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#   Mark Pilgrim - port to Python
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation; either
-# version 2.1 of the License, or (at your option) any later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-# 02110-1301  USA
-######################### END LICENSE BLOCK #########################
-
-from .charsetprober import CharSetProber
-from .enums import ProbingState, MachineState
-from .codingstatemachine import CodingStateMachine
-from .mbcssm import UTF8_SM_MODEL
-
-
-
-class UTF8Prober(CharSetProber):
-    ONE_CHAR_PROB = 0.5
-
-    def __init__(self):
-        super(UTF8Prober, self).__init__()
-        self.coding_sm = CodingStateMachine(UTF8_SM_MODEL)
-        self._num_mb_chars = None
-        self.reset()
-
-    def reset(self):
-        super(UTF8Prober, self).reset()
-        self.coding_sm.reset()
-        self._num_mb_chars = 0
-
-    @property
-    def charset_name(self):
-        return "utf-8"
-
-    @property
-    def language(self):
-        return ""
-
-    def feed(self, byte_str):
-        for c in byte_str:
-            coding_state = self.coding_sm.next_state(c)
-            if coding_state == MachineState.ERROR:
-                self._state = ProbingState.NOT_ME
-                break
-            elif coding_state == MachineState.ITS_ME:
-                self._state = ProbingState.FOUND_IT
-                break
-            elif coding_state == MachineState.START:
-                if self.coding_sm.get_current_charlen() >= 2:
-                    self._num_mb_chars += 1
-
-        if self.state == ProbingState.DETECTING:
-            if self.get_confidence() > self.SHORTCUT_THRESHOLD:
-                self._state = ProbingState.FOUND_IT
-
-        return self.state
-
-    def get_confidence(self):
-        unlike = 0.99
-        if self._num_mb_chars < 6:
-            unlike *= self.ONE_CHAR_PROB ** self._num_mb_chars
-            return 1.0 - unlike
-        else:
-            return unlike
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/version.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/version.py
deleted file mode 100644
index bb2a34a..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/chardet/version.py
+++ /dev/null
@@ -1,9 +0,0 @@
-"""
-This module exists only to simplify retrieving the version number of chardet
-from within setup.py and from chardet subpackages.
-
-:author: Dan Blanchard (dan.blanchard@gmail.com)
-"""
-
-__version__ = "3.0.4"
-VERSION = __version__.split('.')
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/colorama/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/colorama/__init__.py
deleted file mode 100644
index 2a3bf47..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/colorama/__init__.py
+++ /dev/null
@@ -1,6 +0,0 @@
-# Copyright Jonathan Hartley 2013. BSD 3-Clause license, see LICENSE file.
-from .initialise import init, deinit, reinit, colorama_text
-from .ansi import Fore, Back, Style, Cursor
-from .ansitowin32 import AnsiToWin32
-
-__version__ = '0.4.1'
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/colorama/ansi.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/colorama/ansi.py
deleted file mode 100644
index 7877658..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/colorama/ansi.py
+++ /dev/null
@@ -1,102 +0,0 @@
-# Copyright Jonathan Hartley 2013. BSD 3-Clause license, see LICENSE file.
-'''
-This module generates ANSI character codes to printing colors to terminals.
-See: http://en.wikipedia.org/wiki/ANSI_escape_code
-'''
-
-CSI = '\033['
-OSC = '\033]'
-BEL = '\007'
-
-
-def code_to_chars(code):
-    return CSI + str(code) + 'm'
-
-def set_title(title):
-    return OSC + '2;' + title + BEL
-
-def clear_screen(mode=2):
-    return CSI + str(mode) + 'J'
-
-def clear_line(mode=2):
-    return CSI + str(mode) + 'K'
-
-
-class AnsiCodes(object):
-    def __init__(self):
-        # the subclasses declare class attributes which are numbers.
-        # Upon instantiation we define instance attributes, which are the same
-        # as the class attributes but wrapped with the ANSI escape sequence
-        for name in dir(self):
-            if not name.startswith('_'):
-                value = getattr(self, name)
-                setattr(self, name, code_to_chars(value))
-
-
-class AnsiCursor(object):
-    def UP(self, n=1):
-        return CSI + str(n) + 'A'
-    def DOWN(self, n=1):
-        return CSI + str(n) + 'B'
-    def FORWARD(self, n=1):
-        return CSI + str(n) + 'C'
-    def BACK(self, n=1):
-        return CSI + str(n) + 'D'
-    def POS(self, x=1, y=1):
-        return CSI + str(y) + ';' + str(x) + 'H'
-
-
-class AnsiFore(AnsiCodes):
-    BLACK           = 30
-    RED             = 31
-    GREEN           = 32
-    YELLOW          = 33
-    BLUE            = 34
-    MAGENTA         = 35
-    CYAN            = 36
-    WHITE           = 37
-    RESET           = 39
-
-    # These are fairly well supported, but not part of the standard.
-    LIGHTBLACK_EX   = 90
-    LIGHTRED_EX     = 91
-    LIGHTGREEN_EX   = 92
-    LIGHTYELLOW_EX  = 93
-    LIGHTBLUE_EX    = 94
-    LIGHTMAGENTA_EX = 95
-    LIGHTCYAN_EX    = 96
-    LIGHTWHITE_EX   = 97
-
-
-class AnsiBack(AnsiCodes):
-    BLACK           = 40
-    RED             = 41
-    GREEN           = 42
-    YELLOW          = 43
-    BLUE            = 44
-    MAGENTA         = 45
-    CYAN            = 46
-    WHITE           = 47
-    RESET           = 49
-
-    # These are fairly well supported, but not part of the standard.
-    LIGHTBLACK_EX   = 100
-    LIGHTRED_EX     = 101
-    LIGHTGREEN_EX   = 102
-    LIGHTYELLOW_EX  = 103
-    LIGHTBLUE_EX    = 104
-    LIGHTMAGENTA_EX = 105
-    LIGHTCYAN_EX    = 106
-    LIGHTWHITE_EX   = 107
-
-
-class AnsiStyle(AnsiCodes):
-    BRIGHT    = 1
-    DIM       = 2
-    NORMAL    = 22
-    RESET_ALL = 0
-
-Fore   = AnsiFore()
-Back   = AnsiBack()
-Style  = AnsiStyle()
-Cursor = AnsiCursor()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/colorama/ansitowin32.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/colorama/ansitowin32.py
deleted file mode 100644
index 359c92b..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/colorama/ansitowin32.py
+++ /dev/null
@@ -1,257 +0,0 @@
-# Copyright Jonathan Hartley 2013. BSD 3-Clause license, see LICENSE file.
-import re
-import sys
-import os
-
-from .ansi import AnsiFore, AnsiBack, AnsiStyle, Style
-from .winterm import WinTerm, WinColor, WinStyle
-from .win32 import windll, winapi_test
-
-
-winterm = None
-if windll is not None:
-    winterm = WinTerm()
-
-
-class StreamWrapper(object):
-    '''
-    Wraps a stream (such as stdout), acting as a transparent proxy for all
-    attribute access apart from method 'write()', which is delegated to our
-    Converter instance.
-    '''
-    def __init__(self, wrapped, converter):
-        # double-underscore everything to prevent clashes with names of
-        # attributes on the wrapped stream object.
-        self.__wrapped = wrapped
-        self.__convertor = converter
-
-    def __getattr__(self, name):
-        return getattr(self.__wrapped, name)
-
-    def __enter__(self, *args, **kwargs):
-        # special method lookup bypasses __getattr__/__getattribute__, see
-        # https://stackoverflow.com/questions/12632894/why-doesnt-getattr-work-with-exit
-        # thus, contextlib magic methods are not proxied via __getattr__
-        return self.__wrapped.__enter__(*args, **kwargs)
-
-    def __exit__(self, *args, **kwargs):
-        return self.__wrapped.__exit__(*args, **kwargs)
-
-    def write(self, text):
-        self.__convertor.write(text)
-
-    def isatty(self):
-        stream = self.__wrapped
-        if 'PYCHARM_HOSTED' in os.environ:
-            if stream is not None and (stream is sys.__stdout__ or stream is sys.__stderr__):
-                return True
-        try:
-            stream_isatty = stream.isatty
-        except AttributeError:
-            return False
-        else:
-            return stream_isatty()
-
-    @property
-    def closed(self):
-        stream = self.__wrapped
-        try:
-            return stream.closed
-        except AttributeError:
-            return True
-
-
-class AnsiToWin32(object):
-    '''
-    Implements a 'write()' method which, on Windows, will strip ANSI character
-    sequences from the text, and if outputting to a tty, will convert them into
-    win32 function calls.
-    '''
-    ANSI_CSI_RE = re.compile('\001?\033\\[((?:\\d|;)*)([a-zA-Z])\002?')   # Control Sequence Introducer
-    ANSI_OSC_RE = re.compile('\001?\033\\]((?:.|;)*?)(\x07)\002?')        # Operating System Command
-
-    def __init__(self, wrapped, convert=None, strip=None, autoreset=False):
-        # The wrapped stream (normally sys.stdout or sys.stderr)
-        self.wrapped = wrapped
-
-        # should we reset colors to defaults after every .write()
-        self.autoreset = autoreset
-
-        # create the proxy wrapping our output stream
-        self.stream = StreamWrapper(wrapped, self)
-
-        on_windows = os.name == 'nt'
-        # We test if the WinAPI works, because even if we are on Windows
-        # we may be using a terminal that doesn't support the WinAPI
-        # (e.g. Cygwin Terminal). In this case it's up to the terminal
-        # to support the ANSI codes.
-        conversion_supported = on_windows and winapi_test()
-
-        # should we strip ANSI sequences from our output?
-        if strip is None:
-            strip = conversion_supported or (not self.stream.closed and not self.stream.isatty())
-        self.strip = strip
-
-        # should we should convert ANSI sequences into win32 calls?
-        if convert is None:
-            convert = conversion_supported and not self.stream.closed and self.stream.isatty()
-        self.convert = convert
-
-        # dict of ansi codes to win32 functions and parameters
-        self.win32_calls = self.get_win32_calls()
-
-        # are we wrapping stderr?
-        self.on_stderr = self.wrapped is sys.stderr
-
-    def should_wrap(self):
-        '''
-        True if this class is actually needed. If false, then the output
-        stream will not be affected, nor will win32 calls be issued, so
-        wrapping stdout is not actually required. This will generally be
-        False on non-Windows platforms, unless optional functionality like
-        autoreset has been requested using kwargs to init()
-        '''
-        return self.convert or self.strip or self.autoreset
-
-    def get_win32_calls(self):
-        if self.convert and winterm:
-            return {
-                AnsiStyle.RESET_ALL: (winterm.reset_all, ),
-                AnsiStyle.BRIGHT: (winterm.style, WinStyle.BRIGHT),
-                AnsiStyle.DIM: (winterm.style, WinStyle.NORMAL),
-                AnsiStyle.NORMAL: (winterm.style, WinStyle.NORMAL),
-                AnsiFore.BLACK: (winterm.fore, WinColor.BLACK),
-                AnsiFore.RED: (winterm.fore, WinColor.RED),
-                AnsiFore.GREEN: (winterm.fore, WinColor.GREEN),
-                AnsiFore.YELLOW: (winterm.fore, WinColor.YELLOW),
-                AnsiFore.BLUE: (winterm.fore, WinColor.BLUE),
-                AnsiFore.MAGENTA: (winterm.fore, WinColor.MAGENTA),
-                AnsiFore.CYAN: (winterm.fore, WinColor.CYAN),
-                AnsiFore.WHITE: (winterm.fore, WinColor.GREY),
-                AnsiFore.RESET: (winterm.fore, ),
-                AnsiFore.LIGHTBLACK_EX: (winterm.fore, WinColor.BLACK, True),
-                AnsiFore.LIGHTRED_EX: (winterm.fore, WinColor.RED, True),
-                AnsiFore.LIGHTGREEN_EX: (winterm.fore, WinColor.GREEN, True),
-                AnsiFore.LIGHTYELLOW_EX: (winterm.fore, WinColor.YELLOW, True),
-                AnsiFore.LIGHTBLUE_EX: (winterm.fore, WinColor.BLUE, True),
-                AnsiFore.LIGHTMAGENTA_EX: (winterm.fore, WinColor.MAGENTA, True),
-                AnsiFore.LIGHTCYAN_EX: (winterm.fore, WinColor.CYAN, True),
-                AnsiFore.LIGHTWHITE_EX: (winterm.fore, WinColor.GREY, True),
-                AnsiBack.BLACK: (winterm.back, WinColor.BLACK),
-                AnsiBack.RED: (winterm.back, WinColor.RED),
-                AnsiBack.GREEN: (winterm.back, WinColor.GREEN),
-                AnsiBack.YELLOW: (winterm.back, WinColor.YELLOW),
-                AnsiBack.BLUE: (winterm.back, WinColor.BLUE),
-                AnsiBack.MAGENTA: (winterm.back, WinColor.MAGENTA),
-                AnsiBack.CYAN: (winterm.back, WinColor.CYAN),
-                AnsiBack.WHITE: (winterm.back, WinColor.GREY),
-                AnsiBack.RESET: (winterm.back, ),
-                AnsiBack.LIGHTBLACK_EX: (winterm.back, WinColor.BLACK, True),
-                AnsiBack.LIGHTRED_EX: (winterm.back, WinColor.RED, True),
-                AnsiBack.LIGHTGREEN_EX: (winterm.back, WinColor.GREEN, True),
-                AnsiBack.LIGHTYELLOW_EX: (winterm.back, WinColor.YELLOW, True),
-                AnsiBack.LIGHTBLUE_EX: (winterm.back, WinColor.BLUE, True),
-                AnsiBack.LIGHTMAGENTA_EX: (winterm.back, WinColor.MAGENTA, True),
-                AnsiBack.LIGHTCYAN_EX: (winterm.back, WinColor.CYAN, True),
-                AnsiBack.LIGHTWHITE_EX: (winterm.back, WinColor.GREY, True),
-            }
-        return dict()
-
-    def write(self, text):
-        if self.strip or self.convert:
-            self.write_and_convert(text)
-        else:
-            self.wrapped.write(text)
-            self.wrapped.flush()
-        if self.autoreset:
-            self.reset_all()
-
-
-    def reset_all(self):
-        if self.convert:
-            self.call_win32('m', (0,))
-        elif not self.strip and not self.stream.closed:
-            self.wrapped.write(Style.RESET_ALL)
-
-
-    def write_and_convert(self, text):
-        '''
-        Write the given text to our wrapped stream, stripping any ANSI
-        sequences from the text, and optionally converting them into win32
-        calls.
-        '''
-        cursor = 0
-        text = self.convert_osc(text)
-        for match in self.ANSI_CSI_RE.finditer(text):
-            start, end = match.span()
-            self.write_plain_text(text, cursor, start)
-            self.convert_ansi(*match.groups())
-            cursor = end
-        self.write_plain_text(text, cursor, len(text))
-
-
-    def write_plain_text(self, text, start, end):
-        if start < end:
-            self.wrapped.write(text[start:end])
-            self.wrapped.flush()
-
-
-    def convert_ansi(self, paramstring, command):
-        if self.convert:
-            params = self.extract_params(command, paramstring)
-            self.call_win32(command, params)
-
-
-    def extract_params(self, command, paramstring):
-        if command in 'Hf':
-            params = tuple(int(p) if len(p) != 0 else 1 for p in paramstring.split(';'))
-            while len(params) < 2:
-                # defaults:
-                params = params + (1,)
-        else:
-            params = tuple(int(p) for p in paramstring.split(';') if len(p) != 0)
-            if len(params) == 0:
-                # defaults:
-                if command in 'JKm':
-                    params = (0,)
-                elif command in 'ABCD':
-                    params = (1,)
-
-        return params
-
-
-    def call_win32(self, command, params):
-        if command == 'm':
-            for param in params:
-                if param in self.win32_calls:
-                    func_args = self.win32_calls[param]
-                    func = func_args[0]
-                    args = func_args[1:]
-                    kwargs = dict(on_stderr=self.on_stderr)
-                    func(*args, **kwargs)
-        elif command in 'J':
-            winterm.erase_screen(params[0], on_stderr=self.on_stderr)
-        elif command in 'K':
-            winterm.erase_line(params[0], on_stderr=self.on_stderr)
-        elif command in 'Hf':     # cursor position - absolute
-            winterm.set_cursor_position(params, on_stderr=self.on_stderr)
-        elif command in 'ABCD':   # cursor position - relative
-            n = params[0]
-            # A - up, B - down, C - forward, D - back
-            x, y = {'A': (0, -n), 'B': (0, n), 'C': (n, 0), 'D': (-n, 0)}[command]
-            winterm.cursor_adjust(x, y, on_stderr=self.on_stderr)
-
-
-    def convert_osc(self, text):
-        for match in self.ANSI_OSC_RE.finditer(text):
-            start, end = match.span()
-            text = text[:start] + text[end:]
-            paramstring, command = match.groups()
-            if command in '\x07':       # \x07 = BEL
-                params = paramstring.split(";")
-                # 0 - change title and icon (we will only change title)
-                # 1 - change icon (we don't support this)
-                # 2 - change title
-                if params[0] in '02':
-                    winterm.set_title(params[1])
-        return text
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/colorama/initialise.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/colorama/initialise.py
deleted file mode 100644
index 430d066..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/colorama/initialise.py
+++ /dev/null
@@ -1,80 +0,0 @@
-# Copyright Jonathan Hartley 2013. BSD 3-Clause license, see LICENSE file.
-import atexit
-import contextlib
-import sys
-
-from .ansitowin32 import AnsiToWin32
-
-
-orig_stdout = None
-orig_stderr = None
-
-wrapped_stdout = None
-wrapped_stderr = None
-
-atexit_done = False
-
-
-def reset_all():
-    if AnsiToWin32 is not None:    # Issue #74: objects might become None at exit
-        AnsiToWin32(orig_stdout).reset_all()
-
-
-def init(autoreset=False, convert=None, strip=None, wrap=True):
-
-    if not wrap and any([autoreset, convert, strip]):
-        raise ValueError('wrap=False conflicts with any other arg=True')
-
-    global wrapped_stdout, wrapped_stderr
-    global orig_stdout, orig_stderr
-
-    orig_stdout = sys.stdout
-    orig_stderr = sys.stderr
-
-    if sys.stdout is None:
-        wrapped_stdout = None
-    else:
-        sys.stdout = wrapped_stdout = \
-            wrap_stream(orig_stdout, convert, strip, autoreset, wrap)
-    if sys.stderr is None:
-        wrapped_stderr = None
-    else:
-        sys.stderr = wrapped_stderr = \
-            wrap_stream(orig_stderr, convert, strip, autoreset, wrap)
-
-    global atexit_done
-    if not atexit_done:
-        atexit.register(reset_all)
-        atexit_done = True
-
-
-def deinit():
-    if orig_stdout is not None:
-        sys.stdout = orig_stdout
-    if orig_stderr is not None:
-        sys.stderr = orig_stderr
-
-
-@contextlib.contextmanager
-def colorama_text(*args, **kwargs):
-    init(*args, **kwargs)
-    try:
-        yield
-    finally:
-        deinit()
-
-
-def reinit():
-    if wrapped_stdout is not None:
-        sys.stdout = wrapped_stdout
-    if wrapped_stderr is not None:
-        sys.stderr = wrapped_stderr
-
-
-def wrap_stream(stream, convert, strip, autoreset, wrap):
-    if wrap:
-        wrapper = AnsiToWin32(stream,
-            convert=convert, strip=strip, autoreset=autoreset)
-        if wrapper.should_wrap():
-            stream = wrapper.stream
-    return stream
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/colorama/win32.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/colorama/win32.py
deleted file mode 100644
index c2d8360..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/colorama/win32.py
+++ /dev/null
@@ -1,152 +0,0 @@
-# Copyright Jonathan Hartley 2013. BSD 3-Clause license, see LICENSE file.
-
-# from winbase.h
-STDOUT = -11
-STDERR = -12
-
-try:
-    import ctypes
-    from ctypes import LibraryLoader
-    windll = LibraryLoader(ctypes.WinDLL)
-    from ctypes import wintypes
-except (AttributeError, ImportError):
-    windll = None
-    SetConsoleTextAttribute = lambda *_: None
-    winapi_test = lambda *_: None
-else:
-    from ctypes import byref, Structure, c_char, POINTER
-
-    COORD = wintypes._COORD
-
-    class CONSOLE_SCREEN_BUFFER_INFO(Structure):
-        """struct in wincon.h."""
-        _fields_ = [
-            ("dwSize", COORD),
-            ("dwCursorPosition", COORD),
-            ("wAttributes", wintypes.WORD),
-            ("srWindow", wintypes.SMALL_RECT),
-            ("dwMaximumWindowSize", COORD),
-        ]
-        def __str__(self):
-            return '(%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d)' % (
-                self.dwSize.Y, self.dwSize.X
-                , self.dwCursorPosition.Y, self.dwCursorPosition.X
-                , self.wAttributes
-                , self.srWindow.Top, self.srWindow.Left, self.srWindow.Bottom, self.srWindow.Right
-                , self.dwMaximumWindowSize.Y, self.dwMaximumWindowSize.X
-            )
-
-    _GetStdHandle = windll.kernel32.GetStdHandle
-    _GetStdHandle.argtypes = [
-        wintypes.DWORD,
-    ]
-    _GetStdHandle.restype = wintypes.HANDLE
-
-    _GetConsoleScreenBufferInfo = windll.kernel32.GetConsoleScreenBufferInfo
-    _GetConsoleScreenBufferInfo.argtypes = [
-        wintypes.HANDLE,
-        POINTER(CONSOLE_SCREEN_BUFFER_INFO),
-    ]
-    _GetConsoleScreenBufferInfo.restype = wintypes.BOOL
-
-    _SetConsoleTextAttribute = windll.kernel32.SetConsoleTextAttribute
-    _SetConsoleTextAttribute.argtypes = [
-        wintypes.HANDLE,
-        wintypes.WORD,
-    ]
-    _SetConsoleTextAttribute.restype = wintypes.BOOL
-
-    _SetConsoleCursorPosition = windll.kernel32.SetConsoleCursorPosition
-    _SetConsoleCursorPosition.argtypes = [
-        wintypes.HANDLE,
-        COORD,
-    ]
-    _SetConsoleCursorPosition.restype = wintypes.BOOL
-
-    _FillConsoleOutputCharacterA = windll.kernel32.FillConsoleOutputCharacterA
-    _FillConsoleOutputCharacterA.argtypes = [
-        wintypes.HANDLE,
-        c_char,
-        wintypes.DWORD,
-        COORD,
-        POINTER(wintypes.DWORD),
-    ]
-    _FillConsoleOutputCharacterA.restype = wintypes.BOOL
-
-    _FillConsoleOutputAttribute = windll.kernel32.FillConsoleOutputAttribute
-    _FillConsoleOutputAttribute.argtypes = [
-        wintypes.HANDLE,
-        wintypes.WORD,
-        wintypes.DWORD,
-        COORD,
-        POINTER(wintypes.DWORD),
-    ]
-    _FillConsoleOutputAttribute.restype = wintypes.BOOL
-
-    _SetConsoleTitleW = windll.kernel32.SetConsoleTitleW
-    _SetConsoleTitleW.argtypes = [
-        wintypes.LPCWSTR
-    ]
-    _SetConsoleTitleW.restype = wintypes.BOOL
-
-    def _winapi_test(handle):
-        csbi = CONSOLE_SCREEN_BUFFER_INFO()
-        success = _GetConsoleScreenBufferInfo(
-            handle, byref(csbi))
-        return bool(success)
-
-    def winapi_test():
-        return any(_winapi_test(h) for h in
-                   (_GetStdHandle(STDOUT), _GetStdHandle(STDERR)))
-
-    def GetConsoleScreenBufferInfo(stream_id=STDOUT):
-        handle = _GetStdHandle(stream_id)
-        csbi = CONSOLE_SCREEN_BUFFER_INFO()
-        success = _GetConsoleScreenBufferInfo(
-            handle, byref(csbi))
-        return csbi
-
-    def SetConsoleTextAttribute(stream_id, attrs):
-        handle = _GetStdHandle(stream_id)
-        return _SetConsoleTextAttribute(handle, attrs)
-
-    def SetConsoleCursorPosition(stream_id, position, adjust=True):
-        position = COORD(*position)
-        # If the position is out of range, do nothing.
-        if position.Y <= 0 or position.X <= 0:
-            return
-        # Adjust for Windows' SetConsoleCursorPosition:
-        #    1. being 0-based, while ANSI is 1-based.
-        #    2. expecting (x,y), while ANSI uses (y,x).
-        adjusted_position = COORD(position.Y - 1, position.X - 1)
-        if adjust:
-            # Adjust for viewport's scroll position
-            sr = GetConsoleScreenBufferInfo(STDOUT).srWindow
-            adjusted_position.Y += sr.Top
-            adjusted_position.X += sr.Left
-        # Resume normal processing
-        handle = _GetStdHandle(stream_id)
-        return _SetConsoleCursorPosition(handle, adjusted_position)
-
-    def FillConsoleOutputCharacter(stream_id, char, length, start):
-        handle = _GetStdHandle(stream_id)
-        char = c_char(char.encode())
-        length = wintypes.DWORD(length)
-        num_written = wintypes.DWORD(0)
-        # Note that this is hard-coded for ANSI (vs wide) bytes.
-        success = _FillConsoleOutputCharacterA(
-            handle, char, length, start, byref(num_written))
-        return num_written.value
-
-    def FillConsoleOutputAttribute(stream_id, attr, length, start):
-        ''' FillConsoleOutputAttribute( hConsole, csbi.wAttributes, dwConSize, coordScreen, &cCharsWritten )'''
-        handle = _GetStdHandle(stream_id)
-        attribute = wintypes.WORD(attr)
-        length = wintypes.DWORD(length)
-        num_written = wintypes.DWORD(0)
-        # Note that this is hard-coded for ANSI (vs wide) bytes.
-        return _FillConsoleOutputAttribute(
-            handle, attribute, length, start, byref(num_written))
-
-    def SetConsoleTitle(title):
-        return _SetConsoleTitleW(title)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/colorama/winterm.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/colorama/winterm.py
deleted file mode 100644
index 0fdb4ec..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/colorama/winterm.py
+++ /dev/null
@@ -1,169 +0,0 @@
-# Copyright Jonathan Hartley 2013. BSD 3-Clause license, see LICENSE file.
-from . import win32
-
-
-# from wincon.h
-class WinColor(object):
-    BLACK   = 0
-    BLUE    = 1
-    GREEN   = 2
-    CYAN    = 3
-    RED     = 4
-    MAGENTA = 5
-    YELLOW  = 6
-    GREY    = 7
-
-# from wincon.h
-class WinStyle(object):
-    NORMAL              = 0x00 # dim text, dim background
-    BRIGHT              = 0x08 # bright text, dim background
-    BRIGHT_BACKGROUND   = 0x80 # dim text, bright background
-
-class WinTerm(object):
-
-    def __init__(self):
-        self._default = win32.GetConsoleScreenBufferInfo(win32.STDOUT).wAttributes
-        self.set_attrs(self._default)
-        self._default_fore = self._fore
-        self._default_back = self._back
-        self._default_style = self._style
-        # In order to emulate LIGHT_EX in windows, we borrow the BRIGHT style.
-        # So that LIGHT_EX colors and BRIGHT style do not clobber each other,
-        # we track them separately, since LIGHT_EX is overwritten by Fore/Back
-        # and BRIGHT is overwritten by Style codes.
-        self._light = 0
-
-    def get_attrs(self):
-        return self._fore + self._back * 16 + (self._style | self._light)
-
-    def set_attrs(self, value):
-        self._fore = value & 7
-        self._back = (value >> 4) & 7
-        self._style = value & (WinStyle.BRIGHT | WinStyle.BRIGHT_BACKGROUND)
-
-    def reset_all(self, on_stderr=None):
-        self.set_attrs(self._default)
-        self.set_console(attrs=self._default)
-        self._light = 0
-
-    def fore(self, fore=None, light=False, on_stderr=False):
-        if fore is None:
-            fore = self._default_fore
-        self._fore = fore
-        # Emulate LIGHT_EX with BRIGHT Style
-        if light:
-            self._light |= WinStyle.BRIGHT
-        else:
-            self._light &= ~WinStyle.BRIGHT
-        self.set_console(on_stderr=on_stderr)
-
-    def back(self, back=None, light=False, on_stderr=False):
-        if back is None:
-            back = self._default_back
-        self._back = back
-        # Emulate LIGHT_EX with BRIGHT_BACKGROUND Style
-        if light:
-            self._light |= WinStyle.BRIGHT_BACKGROUND
-        else:
-            self._light &= ~WinStyle.BRIGHT_BACKGROUND
-        self.set_console(on_stderr=on_stderr)
-
-    def style(self, style=None, on_stderr=False):
-        if style is None:
-            style = self._default_style
-        self._style = style
-        self.set_console(on_stderr=on_stderr)
-
-    def set_console(self, attrs=None, on_stderr=False):
-        if attrs is None:
-            attrs = self.get_attrs()
-        handle = win32.STDOUT
-        if on_stderr:
-            handle = win32.STDERR
-        win32.SetConsoleTextAttribute(handle, attrs)
-
-    def get_position(self, handle):
-        position = win32.GetConsoleScreenBufferInfo(handle).dwCursorPosition
-        # Because Windows coordinates are 0-based,
-        # and win32.SetConsoleCursorPosition expects 1-based.
-        position.X += 1
-        position.Y += 1
-        return position
-
-    def set_cursor_position(self, position=None, on_stderr=False):
-        if position is None:
-            # I'm not currently tracking the position, so there is no default.
-            # position = self.get_position()
-            return
-        handle = win32.STDOUT
-        if on_stderr:
-            handle = win32.STDERR
-        win32.SetConsoleCursorPosition(handle, position)
-
-    def cursor_adjust(self, x, y, on_stderr=False):
-        handle = win32.STDOUT
-        if on_stderr:
-            handle = win32.STDERR
-        position = self.get_position(handle)
-        adjusted_position = (position.Y + y, position.X + x)
-        win32.SetConsoleCursorPosition(handle, adjusted_position, adjust=False)
-
-    def erase_screen(self, mode=0, on_stderr=False):
-        # 0 should clear from the cursor to the end of the screen.
-        # 1 should clear from the cursor to the beginning of the screen.
-        # 2 should clear the entire screen, and move cursor to (1,1)
-        handle = win32.STDOUT
-        if on_stderr:
-            handle = win32.STDERR
-        csbi = win32.GetConsoleScreenBufferInfo(handle)
-        # get the number of character cells in the current buffer
-        cells_in_screen = csbi.dwSize.X * csbi.dwSize.Y
-        # get number of character cells before current cursor position
-        cells_before_cursor = csbi.dwSize.X * csbi.dwCursorPosition.Y + csbi.dwCursorPosition.X
-        if mode == 0:
-            from_coord = csbi.dwCursorPosition
-            cells_to_erase = cells_in_screen - cells_before_cursor
-        elif mode == 1:
-            from_coord = win32.COORD(0, 0)
-            cells_to_erase = cells_before_cursor
-        elif mode == 2:
-            from_coord = win32.COORD(0, 0)
-            cells_to_erase = cells_in_screen
-        else:
-            # invalid mode
-            return
-        # fill the entire screen with blanks
-        win32.FillConsoleOutputCharacter(handle, ' ', cells_to_erase, from_coord)
-        # now set the buffer's attributes accordingly
-        win32.FillConsoleOutputAttribute(handle, self.get_attrs(), cells_to_erase, from_coord)
-        if mode == 2:
-            # put the cursor where needed
-            win32.SetConsoleCursorPosition(handle, (1, 1))
-
-    def erase_line(self, mode=0, on_stderr=False):
-        # 0 should clear from the cursor to the end of the line.
-        # 1 should clear from the cursor to the beginning of the line.
-        # 2 should clear the entire line.
-        handle = win32.STDOUT
-        if on_stderr:
-            handle = win32.STDERR
-        csbi = win32.GetConsoleScreenBufferInfo(handle)
-        if mode == 0:
-            from_coord = csbi.dwCursorPosition
-            cells_to_erase = csbi.dwSize.X - csbi.dwCursorPosition.X
-        elif mode == 1:
-            from_coord = win32.COORD(0, csbi.dwCursorPosition.Y)
-            cells_to_erase = csbi.dwCursorPosition.X
-        elif mode == 2:
-            from_coord = win32.COORD(0, csbi.dwCursorPosition.Y)
-            cells_to_erase = csbi.dwSize.X
-        else:
-            # invalid mode
-            return
-        # fill the entire screen with blanks
-        win32.FillConsoleOutputCharacter(handle, ' ', cells_to_erase, from_coord)
-        # now set the buffer's attributes accordingly
-        win32.FillConsoleOutputAttribute(handle, self.get_attrs(), cells_to_erase, from_coord)
-
-    def set_title(self, title):
-        win32.SetConsoleTitle(title)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/__init__.py
deleted file mode 100644
index a786b4d..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/__init__.py
+++ /dev/null
@@ -1,23 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-# Copyright (C) 2012-2017 Vinay Sajip.
-# Licensed to the Python Software Foundation under a contributor agreement.
-# See LICENSE.txt and CONTRIBUTORS.txt.
-#
-import logging
-
-__version__ = '0.2.8'
-
-class DistlibException(Exception):
-    pass
-
-try:
-    from logging import NullHandler
-except ImportError: # pragma: no cover
-    class NullHandler(logging.Handler):
-        def handle(self, record): pass
-        def emit(self, record): pass
-        def createLock(self): self.lock = None
-
-logger = logging.getLogger(__name__)
-logger.addHandler(NullHandler())
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/_backport/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/_backport/__init__.py
deleted file mode 100644
index f7dbf4c..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/_backport/__init__.py
+++ /dev/null
@@ -1,6 +0,0 @@
-"""Modules copied from Python 3 standard libraries, for internal use only.
-
-Individual classes and functions are found in d2._backport.misc.  Intended
-usage is to always import things missing from 3.1 from that module: the
-built-in/stdlib objects will be used if found.
-"""
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/_backport/misc.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/_backport/misc.py
deleted file mode 100644
index cfb318d..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/_backport/misc.py
+++ /dev/null
@@ -1,41 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-# Copyright (C) 2012 The Python Software Foundation.
-# See LICENSE.txt and CONTRIBUTORS.txt.
-#
-"""Backports for individual classes and functions."""
-
-import os
-import sys
-
-__all__ = ['cache_from_source', 'callable', 'fsencode']
-
-
-try:
-    from imp import cache_from_source
-except ImportError:
-    def cache_from_source(py_file, debug=__debug__):
-        ext = debug and 'c' or 'o'
-        return py_file + ext
-
-
-try:
-    callable = callable
-except NameError:
-    from collections import Callable
-
-    def callable(obj):
-        return isinstance(obj, Callable)
-
-
-try:
-    fsencode = os.fsencode
-except AttributeError:
-    def fsencode(filename):
-        if isinstance(filename, bytes):
-            return filename
-        elif isinstance(filename, str):
-            return filename.encode(sys.getfilesystemencoding())
-        else:
-            raise TypeError("expect bytes or str, not %s" %
-                            type(filename).__name__)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/_backport/shutil.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/_backport/shutil.py
deleted file mode 100644
index 159e49e..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/_backport/shutil.py
+++ /dev/null
@@ -1,761 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-# Copyright (C) 2012 The Python Software Foundation.
-# See LICENSE.txt and CONTRIBUTORS.txt.
-#
-"""Utility functions for copying and archiving files and directory trees.
-
-XXX The functions here don't copy the resource fork or other metadata on Mac.
-
-"""
-
-import os
-import sys
-import stat
-from os.path import abspath
-import fnmatch
-import collections
-import errno
-from . import tarfile
-
-try:
-    import bz2
-    _BZ2_SUPPORTED = True
-except ImportError:
-    _BZ2_SUPPORTED = False
-
-try:
-    from pwd import getpwnam
-except ImportError:
-    getpwnam = None
-
-try:
-    from grp import getgrnam
-except ImportError:
-    getgrnam = None
-
-__all__ = ["copyfileobj", "copyfile", "copymode", "copystat", "copy", "copy2",
-           "copytree", "move", "rmtree", "Error", "SpecialFileError",
-           "ExecError", "make_archive", "get_archive_formats",
-           "register_archive_format", "unregister_archive_format",
-           "get_unpack_formats", "register_unpack_format",
-           "unregister_unpack_format", "unpack_archive", "ignore_patterns"]
-
-class Error(EnvironmentError):
-    pass
-
-class SpecialFileError(EnvironmentError):
-    """Raised when trying to do a kind of operation (e.g. copying) which is
-    not supported on a special file (e.g. a named pipe)"""
-
-class ExecError(EnvironmentError):
-    """Raised when a command could not be executed"""
-
-class ReadError(EnvironmentError):
-    """Raised when an archive cannot be read"""
-
-class RegistryError(Exception):
-    """Raised when a registry operation with the archiving
-    and unpacking registries fails"""
-
-
-try:
-    WindowsError
-except NameError:
-    WindowsError = None
-
-def copyfileobj(fsrc, fdst, length=16*1024):
-    """copy data from file-like object fsrc to file-like object fdst"""
-    while 1:
-        buf = fsrc.read(length)
-        if not buf:
-            break
-        fdst.write(buf)
-
-def _samefile(src, dst):
-    # Macintosh, Unix.
-    if hasattr(os.path, 'samefile'):
-        try:
-            return os.path.samefile(src, dst)
-        except OSError:
-            return False
-
-    # All other platforms: check for same pathname.
-    return (os.path.normcase(os.path.abspath(src)) ==
-            os.path.normcase(os.path.abspath(dst)))
-
-def copyfile(src, dst):
-    """Copy data from src to dst"""
-    if _samefile(src, dst):
-        raise Error("`%s` and `%s` are the same file" % (src, dst))
-
-    for fn in [src, dst]:
-        try:
-            st = os.stat(fn)
-        except OSError:
-            # File most likely does not exist
-            pass
-        else:
-            # XXX What about other special files? (sockets, devices...)
-            if stat.S_ISFIFO(st.st_mode):
-                raise SpecialFileError("`%s` is a named pipe" % fn)
-
-    with open(src, 'rb') as fsrc:
-        with open(dst, 'wb') as fdst:
-            copyfileobj(fsrc, fdst)
-
-def copymode(src, dst):
-    """Copy mode bits from src to dst"""
-    if hasattr(os, 'chmod'):
-        st = os.stat(src)
-        mode = stat.S_IMODE(st.st_mode)
-        os.chmod(dst, mode)
-
-def copystat(src, dst):
-    """Copy all stat info (mode bits, atime, mtime, flags) from src to dst"""
-    st = os.stat(src)
-    mode = stat.S_IMODE(st.st_mode)
-    if hasattr(os, 'utime'):
-        os.utime(dst, (st.st_atime, st.st_mtime))
-    if hasattr(os, 'chmod'):
-        os.chmod(dst, mode)
-    if hasattr(os, 'chflags') and hasattr(st, 'st_flags'):
-        try:
-            os.chflags(dst, st.st_flags)
-        except OSError as why:
-            if (not hasattr(errno, 'EOPNOTSUPP') or
-                why.errno != errno.EOPNOTSUPP):
-                raise
-
-def copy(src, dst):
-    """Copy data and mode bits ("cp src dst").
-
-    The destination may be a directory.
-
-    """
-    if os.path.isdir(dst):
-        dst = os.path.join(dst, os.path.basename(src))
-    copyfile(src, dst)
-    copymode(src, dst)
-
-def copy2(src, dst):
-    """Copy data and all stat info ("cp -p src dst").
-
-    The destination may be a directory.
-
-    """
-    if os.path.isdir(dst):
-        dst = os.path.join(dst, os.path.basename(src))
-    copyfile(src, dst)
-    copystat(src, dst)
-
-def ignore_patterns(*patterns):
-    """Function that can be used as copytree() ignore parameter.
-
-    Patterns is a sequence of glob-style patterns
-    that are used to exclude files"""
-    def _ignore_patterns(path, names):
-        ignored_names = []
-        for pattern in patterns:
-            ignored_names.extend(fnmatch.filter(names, pattern))
-        return set(ignored_names)
-    return _ignore_patterns
-
-def copytree(src, dst, symlinks=False, ignore=None, copy_function=copy2,
-             ignore_dangling_symlinks=False):
-    """Recursively copy a directory tree.
-
-    The destination directory must not already exist.
-    If exception(s) occur, an Error is raised with a list of reasons.
-
-    If the optional symlinks flag is true, symbolic links in the
-    source tree result in symbolic links in the destination tree; if
-    it is false, the contents of the files pointed to by symbolic
-    links are copied. If the file pointed by the symlink doesn't
-    exist, an exception will be added in the list of errors raised in
-    an Error exception at the end of the copy process.
-
-    You can set the optional ignore_dangling_symlinks flag to true if you
-    want to silence this exception. Notice that this has no effect on
-    platforms that don't support os.symlink.
-
-    The optional ignore argument is a callable. If given, it
-    is called with the `src` parameter, which is the directory
-    being visited by copytree(), and `names` which is the list of
-    `src` contents, as returned by os.listdir():
-
-        callable(src, names) -> ignored_names
-
-    Since copytree() is called recursively, the callable will be
-    called once for each directory that is copied. It returns a
-    list of names relative to the `src` directory that should
-    not be copied.
-
-    The optional copy_function argument is a callable that will be used
-    to copy each file. It will be called with the source path and the
-    destination path as arguments. By default, copy2() is used, but any
-    function that supports the same signature (like copy()) can be used.
-
-    """
-    names = os.listdir(src)
-    if ignore is not None:
-        ignored_names = ignore(src, names)
-    else:
-        ignored_names = set()
-
-    os.makedirs(dst)
-    errors = []
-    for name in names:
-        if name in ignored_names:
-            continue
-        srcname = os.path.join(src, name)
-        dstname = os.path.join(dst, name)
-        try:
-            if os.path.islink(srcname):
-                linkto = os.readlink(srcname)
-                if symlinks:
-                    os.symlink(linkto, dstname)
-                else:
-                    # ignore dangling symlink if the flag is on
-                    if not os.path.exists(linkto) and ignore_dangling_symlinks:
-                        continue
-                    # otherwise let the copy occurs. copy2 will raise an error
-                    copy_function(srcname, dstname)
-            elif os.path.isdir(srcname):
-                copytree(srcname, dstname, symlinks, ignore, copy_function)
-            else:
-                # Will raise a SpecialFileError for unsupported file types
-                copy_function(srcname, dstname)
-        # catch the Error from the recursive copytree so that we can
-        # continue with other files
-        except Error as err:
-            errors.extend(err.args[0])
-        except EnvironmentError as why:
-            errors.append((srcname, dstname, str(why)))
-    try:
-        copystat(src, dst)
-    except OSError as why:
-        if WindowsError is not None and isinstance(why, WindowsError):
-            # Copying file access times may fail on Windows
-            pass
-        else:
-            errors.extend((src, dst, str(why)))
-    if errors:
-        raise Error(errors)
-
-def rmtree(path, ignore_errors=False, onerror=None):
-    """Recursively delete a directory tree.
-
-    If ignore_errors is set, errors are ignored; otherwise, if onerror
-    is set, it is called to handle the error with arguments (func,
-    path, exc_info) where func is os.listdir, os.remove, or os.rmdir;
-    path is the argument to that function that caused it to fail; and
-    exc_info is a tuple returned by sys.exc_info().  If ignore_errors
-    is false and onerror is None, an exception is raised.
-
-    """
-    if ignore_errors:
-        def onerror(*args):
-            pass
-    elif onerror is None:
-        def onerror(*args):
-            raise
-    try:
-        if os.path.islink(path):
-            # symlinks to directories are forbidden, see bug #1669
-            raise OSError("Cannot call rmtree on a symbolic link")
-    except OSError:
-        onerror(os.path.islink, path, sys.exc_info())
-        # can't continue even if onerror hook returns
-        return
-    names = []
-    try:
-        names = os.listdir(path)
-    except os.error:
-        onerror(os.listdir, path, sys.exc_info())
-    for name in names:
-        fullname = os.path.join(path, name)
-        try:
-            mode = os.lstat(fullname).st_mode
-        except os.error:
-            mode = 0
-        if stat.S_ISDIR(mode):
-            rmtree(fullname, ignore_errors, onerror)
-        else:
-            try:
-                os.remove(fullname)
-            except os.error:
-                onerror(os.remove, fullname, sys.exc_info())
-    try:
-        os.rmdir(path)
-    except os.error:
-        onerror(os.rmdir, path, sys.exc_info())
-
-
-def _basename(path):
-    # A basename() variant which first strips the trailing slash, if present.
-    # Thus we always get the last component of the path, even for directories.
-    return os.path.basename(path.rstrip(os.path.sep))
-
-def move(src, dst):
-    """Recursively move a file or directory to another location. This is
-    similar to the Unix "mv" command.
-
-    If the destination is a directory or a symlink to a directory, the source
-    is moved inside the directory. The destination path must not already
-    exist.
-
-    If the destination already exists but is not a directory, it may be
-    overwritten depending on os.rename() semantics.
-
-    If the destination is on our current filesystem, then rename() is used.
-    Otherwise, src is copied to the destination and then removed.
-    A lot more could be done here...  A look at a mv.c shows a lot of
-    the issues this implementation glosses over.
-
-    """
-    real_dst = dst
-    if os.path.isdir(dst):
-        if _samefile(src, dst):
-            # We might be on a case insensitive filesystem,
-            # perform the rename anyway.
-            os.rename(src, dst)
-            return
-
-        real_dst = os.path.join(dst, _basename(src))
-        if os.path.exists(real_dst):
-            raise Error("Destination path '%s' already exists" % real_dst)
-    try:
-        os.rename(src, real_dst)
-    except OSError:
-        if os.path.isdir(src):
-            if _destinsrc(src, dst):
-                raise Error("Cannot move a directory '%s' into itself '%s'." % (src, dst))
-            copytree(src, real_dst, symlinks=True)
-            rmtree(src)
-        else:
-            copy2(src, real_dst)
-            os.unlink(src)
-
-def _destinsrc(src, dst):
-    src = abspath(src)
-    dst = abspath(dst)
-    if not src.endswith(os.path.sep):
-        src += os.path.sep
-    if not dst.endswith(os.path.sep):
-        dst += os.path.sep
-    return dst.startswith(src)
-
-def _get_gid(name):
-    """Returns a gid, given a group name."""
-    if getgrnam is None or name is None:
-        return None
-    try:
-        result = getgrnam(name)
-    except KeyError:
-        result = None
-    if result is not None:
-        return result[2]
-    return None
-
-def _get_uid(name):
-    """Returns an uid, given a user name."""
-    if getpwnam is None or name is None:
-        return None
-    try:
-        result = getpwnam(name)
-    except KeyError:
-        result = None
-    if result is not None:
-        return result[2]
-    return None
-
-def _make_tarball(base_name, base_dir, compress="gzip", verbose=0, dry_run=0,
-                  owner=None, group=None, logger=None):
-    """Create a (possibly compressed) tar file from all the files under
-    'base_dir'.
-
-    'compress' must be "gzip" (the default), "bzip2", or None.
-
-    'owner' and 'group' can be used to define an owner and a group for the
-    archive that is being built. If not provided, the current owner and group
-    will be used.
-
-    The output tar file will be named 'base_name' +  ".tar", possibly plus
-    the appropriate compression extension (".gz", or ".bz2").
-
-    Returns the output filename.
-    """
-    tar_compression = {'gzip': 'gz', None: ''}
-    compress_ext = {'gzip': '.gz'}
-
-    if _BZ2_SUPPORTED:
-        tar_compression['bzip2'] = 'bz2'
-        compress_ext['bzip2'] = '.bz2'
-
-    # flags for compression program, each element of list will be an argument
-    if compress is not None and compress not in compress_ext:
-        raise ValueError("bad value for 'compress', or compression format not "
-                         "supported : {0}".format(compress))
-
-    archive_name = base_name + '.tar' + compress_ext.get(compress, '')
-    archive_dir = os.path.dirname(archive_name)
-
-    if not os.path.exists(archive_dir):
-        if logger is not None:
-            logger.info("creating %s", archive_dir)
-        if not dry_run:
-            os.makedirs(archive_dir)
-
-    # creating the tarball
-    if logger is not None:
-        logger.info('Creating tar archive')
-
-    uid = _get_uid(owner)
-    gid = _get_gid(group)
-
-    def _set_uid_gid(tarinfo):
-        if gid is not None:
-            tarinfo.gid = gid
-            tarinfo.gname = group
-        if uid is not None:
-            tarinfo.uid = uid
-            tarinfo.uname = owner
-        return tarinfo
-
-    if not dry_run:
-        tar = tarfile.open(archive_name, 'w|%s' % tar_compression[compress])
-        try:
-            tar.add(base_dir, filter=_set_uid_gid)
-        finally:
-            tar.close()
-
-    return archive_name
-
-def _call_external_zip(base_dir, zip_filename, verbose=False, dry_run=False):
-    # XXX see if we want to keep an external call here
-    if verbose:
-        zipoptions = "-r"
-    else:
-        zipoptions = "-rq"
-    from distutils.errors import DistutilsExecError
-    from distutils.spawn import spawn
-    try:
-        spawn(["zip", zipoptions, zip_filename, base_dir], dry_run=dry_run)
-    except DistutilsExecError:
-        # XXX really should distinguish between "couldn't find
-        # external 'zip' command" and "zip failed".
-        raise ExecError("unable to create zip file '%s': "
-            "could neither import the 'zipfile' module nor "
-            "find a standalone zip utility") % zip_filename
-
-def _make_zipfile(base_name, base_dir, verbose=0, dry_run=0, logger=None):
-    """Create a zip file from all the files under 'base_dir'.
-
-    The output zip file will be named 'base_name' + ".zip".  Uses either the
-    "zipfile" Python module (if available) or the InfoZIP "zip" utility
-    (if installed and found on the default search path).  If neither tool is
-    available, raises ExecError.  Returns the name of the output zip
-    file.
-    """
-    zip_filename = base_name + ".zip"
-    archive_dir = os.path.dirname(base_name)
-
-    if not os.path.exists(archive_dir):
-        if logger is not None:
-            logger.info("creating %s", archive_dir)
-        if not dry_run:
-            os.makedirs(archive_dir)
-
-    # If zipfile module is not available, try spawning an external 'zip'
-    # command.
-    try:
-        import zipfile
-    except ImportError:
-        zipfile = None
-
-    if zipfile is None:
-        _call_external_zip(base_dir, zip_filename, verbose, dry_run)
-    else:
-        if logger is not None:
-            logger.info("creating '%s' and adding '%s' to it",
-                        zip_filename, base_dir)
-
-        if not dry_run:
-            zip = zipfile.ZipFile(zip_filename, "w",
-                                  compression=zipfile.ZIP_DEFLATED)
-
-            for dirpath, dirnames, filenames in os.walk(base_dir):
-                for name in filenames:
-                    path = os.path.normpath(os.path.join(dirpath, name))
-                    if os.path.isfile(path):
-                        zip.write(path, path)
-                        if logger is not None:
-                            logger.info("adding '%s'", path)
-            zip.close()
-
-    return zip_filename
-
-_ARCHIVE_FORMATS = {
-    'gztar': (_make_tarball, [('compress', 'gzip')], "gzip'ed tar-file"),
-    'bztar': (_make_tarball, [('compress', 'bzip2')], "bzip2'ed tar-file"),
-    'tar':   (_make_tarball, [('compress', None)], "uncompressed tar file"),
-    'zip':   (_make_zipfile, [], "ZIP file"),
-    }
-
-if _BZ2_SUPPORTED:
-    _ARCHIVE_FORMATS['bztar'] = (_make_tarball, [('compress', 'bzip2')],
-                                "bzip2'ed tar-file")
-
-def get_archive_formats():
-    """Returns a list of supported formats for archiving and unarchiving.
-
-    Each element of the returned sequence is a tuple (name, description)
-    """
-    formats = [(name, registry[2]) for name, registry in
-               _ARCHIVE_FORMATS.items()]
-    formats.sort()
-    return formats
-
-def register_archive_format(name, function, extra_args=None, description=''):
-    """Registers an archive format.
-
-    name is the name of the format. function is the callable that will be
-    used to create archives. If provided, extra_args is a sequence of
-    (name, value) tuples that will be passed as arguments to the callable.
-    description can be provided to describe the format, and will be returned
-    by the get_archive_formats() function.
-    """
-    if extra_args is None:
-        extra_args = []
-    if not isinstance(function, collections.Callable):
-        raise TypeError('The %s object is not callable' % function)
-    if not isinstance(extra_args, (tuple, list)):
-        raise TypeError('extra_args needs to be a sequence')
-    for element in extra_args:
-        if not isinstance(element, (tuple, list)) or len(element) !=2:
-            raise TypeError('extra_args elements are : (arg_name, value)')
-
-    _ARCHIVE_FORMATS[name] = (function, extra_args, description)
-
-def unregister_archive_format(name):
-    del _ARCHIVE_FORMATS[name]
-
-def make_archive(base_name, format, root_dir=None, base_dir=None, verbose=0,
-                 dry_run=0, owner=None, group=None, logger=None):
-    """Create an archive file (eg. zip or tar).
-
-    'base_name' is the name of the file to create, minus any format-specific
-    extension; 'format' is the archive format: one of "zip", "tar", "bztar"
-    or "gztar".
-
-    'root_dir' is a directory that will be the root directory of the
-    archive; ie. we typically chdir into 'root_dir' before creating the
-    archive.  'base_dir' is the directory where we start archiving from;
-    ie. 'base_dir' will be the common prefix of all files and
-    directories in the archive.  'root_dir' and 'base_dir' both default
-    to the current directory.  Returns the name of the archive file.
-
-    'owner' and 'group' are used when creating a tar archive. By default,
-    uses the current owner and group.
-    """
-    save_cwd = os.getcwd()
-    if root_dir is not None:
-        if logger is not None:
-            logger.debug("changing into '%s'", root_dir)
-        base_name = os.path.abspath(base_name)
-        if not dry_run:
-            os.chdir(root_dir)
-
-    if base_dir is None:
-        base_dir = os.curdir
-
-    kwargs = {'dry_run': dry_run, 'logger': logger}
-
-    try:
-        format_info = _ARCHIVE_FORMATS[format]
-    except KeyError:
-        raise ValueError("unknown archive format '%s'" % format)
-
-    func = format_info[0]
-    for arg, val in format_info[1]:
-        kwargs[arg] = val
-
-    if format != 'zip':
-        kwargs['owner'] = owner
-        kwargs['group'] = group
-
-    try:
-        filename = func(base_name, base_dir, **kwargs)
-    finally:
-        if root_dir is not None:
-            if logger is not None:
-                logger.debug("changing back to '%s'", save_cwd)
-            os.chdir(save_cwd)
-
-    return filename
-
-
-def get_unpack_formats():
-    """Returns a list of supported formats for unpacking.
-
-    Each element of the returned sequence is a tuple
-    (name, extensions, description)
-    """
-    formats = [(name, info[0], info[3]) for name, info in
-               _UNPACK_FORMATS.items()]
-    formats.sort()
-    return formats
-
-def _check_unpack_options(extensions, function, extra_args):
-    """Checks what gets registered as an unpacker."""
-    # first make sure no other unpacker is registered for this extension
-    existing_extensions = {}
-    for name, info in _UNPACK_FORMATS.items():
-        for ext in info[0]:
-            existing_extensions[ext] = name
-
-    for extension in extensions:
-        if extension in existing_extensions:
-            msg = '%s is already registered for "%s"'
-            raise RegistryError(msg % (extension,
-                                       existing_extensions[extension]))
-
-    if not isinstance(function, collections.Callable):
-        raise TypeError('The registered function must be a callable')
-
-
-def register_unpack_format(name, extensions, function, extra_args=None,
-                           description=''):
-    """Registers an unpack format.
-
-    `name` is the name of the format. `extensions` is a list of extensions
-    corresponding to the format.
-
-    `function` is the callable that will be
-    used to unpack archives. The callable will receive archives to unpack.
-    If it's unable to handle an archive, it needs to raise a ReadError
-    exception.
-
-    If provided, `extra_args` is a sequence of
-    (name, value) tuples that will be passed as arguments to the callable.
-    description can be provided to describe the format, and will be returned
-    by the get_unpack_formats() function.
-    """
-    if extra_args is None:
-        extra_args = []
-    _check_unpack_options(extensions, function, extra_args)
-    _UNPACK_FORMATS[name] = extensions, function, extra_args, description
-
-def unregister_unpack_format(name):
-    """Removes the pack format from the registry."""
-    del _UNPACK_FORMATS[name]
-
-def _ensure_directory(path):
-    """Ensure that the parent directory of `path` exists"""
-    dirname = os.path.dirname(path)
-    if not os.path.isdir(dirname):
-        os.makedirs(dirname)
-
-def _unpack_zipfile(filename, extract_dir):
-    """Unpack zip `filename` to `extract_dir`
-    """
-    try:
-        import zipfile
-    except ImportError:
-        raise ReadError('zlib not supported, cannot unpack this archive.')
-
-    if not zipfile.is_zipfile(filename):
-        raise ReadError("%s is not a zip file" % filename)
-
-    zip = zipfile.ZipFile(filename)
-    try:
-        for info in zip.infolist():
-            name = info.filename
-
-            # don't extract absolute paths or ones with .. in them
-            if name.startswith('/') or '..' in name:
-                continue
-
-            target = os.path.join(extract_dir, *name.split('/'))
-            if not target:
-                continue
-
-            _ensure_directory(target)
-            if not name.endswith('/'):
-                # file
-                data = zip.read(info.filename)
-                f = open(target, 'wb')
-                try:
-                    f.write(data)
-                finally:
-                    f.close()
-                    del data
-    finally:
-        zip.close()
-
-def _unpack_tarfile(filename, extract_dir):
-    """Unpack tar/tar.gz/tar.bz2 `filename` to `extract_dir`
-    """
-    try:
-        tarobj = tarfile.open(filename)
-    except tarfile.TarError:
-        raise ReadError(
-            "%s is not a compressed or uncompressed tar file" % filename)
-    try:
-        tarobj.extractall(extract_dir)
-    finally:
-        tarobj.close()
-
-_UNPACK_FORMATS = {
-    'gztar': (['.tar.gz', '.tgz'], _unpack_tarfile, [], "gzip'ed tar-file"),
-    'tar':   (['.tar'], _unpack_tarfile, [], "uncompressed tar file"),
-    'zip':   (['.zip'], _unpack_zipfile, [], "ZIP file")
-    }
-
-if _BZ2_SUPPORTED:
-    _UNPACK_FORMATS['bztar'] = (['.bz2'], _unpack_tarfile, [],
-                                "bzip2'ed tar-file")
-
-def _find_unpack_format(filename):
-    for name, info in _UNPACK_FORMATS.items():
-        for extension in info[0]:
-            if filename.endswith(extension):
-                return name
-    return None
-
-def unpack_archive(filename, extract_dir=None, format=None):
-    """Unpack an archive.
-
-    `filename` is the name of the archive.
-
-    `extract_dir` is the name of the target directory, where the archive
-    is unpacked. If not provided, the current working directory is used.
-
-    `format` is the archive format: one of "zip", "tar", or "gztar". Or any
-    other registered format. If not provided, unpack_archive will use the
-    filename extension and see if an unpacker was registered for that
-    extension.
-
-    In case none is found, a ValueError is raised.
-    """
-    if extract_dir is None:
-        extract_dir = os.getcwd()
-
-    if format is not None:
-        try:
-            format_info = _UNPACK_FORMATS[format]
-        except KeyError:
-            raise ValueError("Unknown unpack format '{0}'".format(format))
-
-        func = format_info[1]
-        func(filename, extract_dir, **dict(format_info[2]))
-    else:
-        # we need to look at the registered unpackers supported extensions
-        format = _find_unpack_format(filename)
-        if format is None:
-            raise ReadError("Unknown archive format '{0}'".format(filename))
-
-        func = _UNPACK_FORMATS[format][1]
-        kwargs = dict(_UNPACK_FORMATS[format][2])
-        func(filename, extract_dir, **kwargs)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/_backport/sysconfig.cfg b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/_backport/sysconfig.cfg
deleted file mode 100644
index 1746bd0..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/_backport/sysconfig.cfg
+++ /dev/null
@@ -1,84 +0,0 @@
-[posix_prefix]
-# Configuration directories.  Some of these come straight out of the
-# configure script.  They are for implementing the other variables, not to
-# be used directly in [resource_locations].
-confdir = /etc
-datadir = /usr/share
-libdir = /usr/lib
-statedir = /var
-# User resource directory
-local = ~/.local/{distribution.name}
-
-stdlib = {base}/lib/python{py_version_short}
-platstdlib = {platbase}/lib/python{py_version_short}
-purelib = {base}/lib/python{py_version_short}/site-packages
-platlib = {platbase}/lib/python{py_version_short}/site-packages
-include = {base}/include/python{py_version_short}{abiflags}
-platinclude = {platbase}/include/python{py_version_short}{abiflags}
-data = {base}
-
-[posix_home]
-stdlib = {base}/lib/python
-platstdlib = {base}/lib/python
-purelib = {base}/lib/python
-platlib = {base}/lib/python
-include = {base}/include/python
-platinclude = {base}/include/python
-scripts = {base}/bin
-data = {base}
-
-[nt]
-stdlib = {base}/Lib
-platstdlib = {base}/Lib
-purelib = {base}/Lib/site-packages
-platlib = {base}/Lib/site-packages
-include = {base}/Include
-platinclude = {base}/Include
-scripts = {base}/Scripts
-data = {base}
-
-[os2]
-stdlib = {base}/Lib
-platstdlib = {base}/Lib
-purelib = {base}/Lib/site-packages
-platlib = {base}/Lib/site-packages
-include = {base}/Include
-platinclude = {base}/Include
-scripts = {base}/Scripts
-data = {base}
-
-[os2_home]
-stdlib = {userbase}/lib/python{py_version_short}
-platstdlib = {userbase}/lib/python{py_version_short}
-purelib = {userbase}/lib/python{py_version_short}/site-packages
-platlib = {userbase}/lib/python{py_version_short}/site-packages
-include = {userbase}/include/python{py_version_short}
-scripts = {userbase}/bin
-data = {userbase}
-
-[nt_user]
-stdlib = {userbase}/Python{py_version_nodot}
-platstdlib = {userbase}/Python{py_version_nodot}
-purelib = {userbase}/Python{py_version_nodot}/site-packages
-platlib = {userbase}/Python{py_version_nodot}/site-packages
-include = {userbase}/Python{py_version_nodot}/Include
-scripts = {userbase}/Scripts
-data = {userbase}
-
-[posix_user]
-stdlib = {userbase}/lib/python{py_version_short}
-platstdlib = {userbase}/lib/python{py_version_short}
-purelib = {userbase}/lib/python{py_version_short}/site-packages
-platlib = {userbase}/lib/python{py_version_short}/site-packages
-include = {userbase}/include/python{py_version_short}
-scripts = {userbase}/bin
-data = {userbase}
-
-[osx_framework_user]
-stdlib = {userbase}/lib/python
-platstdlib = {userbase}/lib/python
-purelib = {userbase}/lib/python/site-packages
-platlib = {userbase}/lib/python/site-packages
-include = {userbase}/include
-scripts = {userbase}/bin
-data = {userbase}
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/_backport/sysconfig.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/_backport/sysconfig.py
deleted file mode 100644
index 1df3aba..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/_backport/sysconfig.py
+++ /dev/null
@@ -1,788 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-# Copyright (C) 2012 The Python Software Foundation.
-# See LICENSE.txt and CONTRIBUTORS.txt.
-#
-"""Access to Python's configuration information."""
-
-import codecs
-import os
-import re
-import sys
-from os.path import pardir, realpath
-try:
-    import configparser
-except ImportError:
-    import ConfigParser as configparser
-
-
-__all__ = [
-    'get_config_h_filename',
-    'get_config_var',
-    'get_config_vars',
-    'get_makefile_filename',
-    'get_path',
-    'get_path_names',
-    'get_paths',
-    'get_platform',
-    'get_python_version',
-    'get_scheme_names',
-    'parse_config_h',
-]
-
-
-def _safe_realpath(path):
-    try:
-        return realpath(path)
-    except OSError:
-        return path
-
-
-if sys.executable:
-    _PROJECT_BASE = os.path.dirname(_safe_realpath(sys.executable))
-else:
-    # sys.executable can be empty if argv[0] has been changed and Python is
-    # unable to retrieve the real program name
-    _PROJECT_BASE = _safe_realpath(os.getcwd())
-
-if os.name == "nt" and "pcbuild" in _PROJECT_BASE[-8:].lower():
-    _PROJECT_BASE = _safe_realpath(os.path.join(_PROJECT_BASE, pardir))
-# PC/VS7.1
-if os.name == "nt" and "\\pc\\v" in _PROJECT_BASE[-10:].lower():
-    _PROJECT_BASE = _safe_realpath(os.path.join(_PROJECT_BASE, pardir, pardir))
-# PC/AMD64
-if os.name == "nt" and "\\pcbuild\\amd64" in _PROJECT_BASE[-14:].lower():
-    _PROJECT_BASE = _safe_realpath(os.path.join(_PROJECT_BASE, pardir, pardir))
-
-
-def is_python_build():
-    for fn in ("Setup.dist", "Setup.local"):
-        if os.path.isfile(os.path.join(_PROJECT_BASE, "Modules", fn)):
-            return True
-    return False
-
-_PYTHON_BUILD = is_python_build()
-
-_cfg_read = False
-
-def _ensure_cfg_read():
-    global _cfg_read
-    if not _cfg_read:
-        from ..resources import finder
-        backport_package = __name__.rsplit('.', 1)[0]
-        _finder = finder(backport_package)
-        _cfgfile = _finder.find('sysconfig.cfg')
-        assert _cfgfile, 'sysconfig.cfg exists'
-        with _cfgfile.as_stream() as s:
-            _SCHEMES.readfp(s)
-        if _PYTHON_BUILD:
-            for scheme in ('posix_prefix', 'posix_home'):
-                _SCHEMES.set(scheme, 'include', '{srcdir}/Include')
-                _SCHEMES.set(scheme, 'platinclude', '{projectbase}/.')
-
-        _cfg_read = True
-
-
-_SCHEMES = configparser.RawConfigParser()
-_VAR_REPL = re.compile(r'\{([^{]*?)\}')
-
-def _expand_globals(config):
-    _ensure_cfg_read()
-    if config.has_section('globals'):
-        globals = config.items('globals')
-    else:
-        globals = tuple()
-
-    sections = config.sections()
-    for section in sections:
-        if section == 'globals':
-            continue
-        for option, value in globals:
-            if config.has_option(section, option):
-                continue
-            config.set(section, option, value)
-    config.remove_section('globals')
-
-    # now expanding local variables defined in the cfg file
-    #
-    for section in config.sections():
-        variables = dict(config.items(section))
-
-        def _replacer(matchobj):
-            name = matchobj.group(1)
-            if name in variables:
-                return variables[name]
-            return matchobj.group(0)
-
-        for option, value in config.items(section):
-            config.set(section, option, _VAR_REPL.sub(_replacer, value))
-
-#_expand_globals(_SCHEMES)
-
- # FIXME don't rely on sys.version here, its format is an implementation detail
- # of CPython, use sys.version_info or sys.hexversion
-_PY_VERSION = sys.version.split()[0]
-_PY_VERSION_SHORT = sys.version[:3]
-_PY_VERSION_SHORT_NO_DOT = _PY_VERSION[0] + _PY_VERSION[2]
-_PREFIX = os.path.normpath(sys.prefix)
-_EXEC_PREFIX = os.path.normpath(sys.exec_prefix)
-_CONFIG_VARS = None
-_USER_BASE = None
-
-
-def _subst_vars(path, local_vars):
-    """In the string `path`, replace tokens like {some.thing} with the
-    corresponding value from the map `local_vars`.
-
-    If there is no corresponding value, leave the token unchanged.
-    """
-    def _replacer(matchobj):
-        name = matchobj.group(1)
-        if name in local_vars:
-            return local_vars[name]
-        elif name in os.environ:
-            return os.environ[name]
-        return matchobj.group(0)
-    return _VAR_REPL.sub(_replacer, path)
-
-
-def _extend_dict(target_dict, other_dict):
-    target_keys = target_dict.keys()
-    for key, value in other_dict.items():
-        if key in target_keys:
-            continue
-        target_dict[key] = value
-
-
-def _expand_vars(scheme, vars):
-    res = {}
-    if vars is None:
-        vars = {}
-    _extend_dict(vars, get_config_vars())
-
-    for key, value in _SCHEMES.items(scheme):
-        if os.name in ('posix', 'nt'):
-            value = os.path.expanduser(value)
-        res[key] = os.path.normpath(_subst_vars(value, vars))
-    return res
-
-
-def format_value(value, vars):
-    def _replacer(matchobj):
-        name = matchobj.group(1)
-        if name in vars:
-            return vars[name]
-        return matchobj.group(0)
-    return _VAR_REPL.sub(_replacer, value)
-
-
-def _get_default_scheme():
-    if os.name == 'posix':
-        # the default scheme for posix is posix_prefix
-        return 'posix_prefix'
-    return os.name
-
-
-def _getuserbase():
-    env_base = os.environ.get("PYTHONUSERBASE", None)
-
-    def joinuser(*args):
-        return os.path.expanduser(os.path.join(*args))
-
-    # what about 'os2emx', 'riscos' ?
-    if os.name == "nt":
-        base = os.environ.get("APPDATA") or "~"
-        if env_base:
-            return env_base
-        else:
-            return joinuser(base, "Python")
-
-    if sys.platform == "darwin":
-        framework = get_config_var("PYTHONFRAMEWORK")
-        if framework:
-            if env_base:
-                return env_base
-            else:
-                return joinuser("~", "Library", framework, "%d.%d" %
-                                sys.version_info[:2])
-
-    if env_base:
-        return env_base
-    else:
-        return joinuser("~", ".local")
-
-
-def _parse_makefile(filename, vars=None):
-    """Parse a Makefile-style file.
-
-    A dictionary containing name/value pairs is returned.  If an
-    optional dictionary is passed in as the second argument, it is
-    used instead of a new dictionary.
-    """
-    # Regexes needed for parsing Makefile (and similar syntaxes,
-    # like old-style Setup files).
-    _variable_rx = re.compile(r"([a-zA-Z][a-zA-Z0-9_]+)\s*=\s*(.*)")
-    _findvar1_rx = re.compile(r"\$\(([A-Za-z][A-Za-z0-9_]*)\)")
-    _findvar2_rx = re.compile(r"\${([A-Za-z][A-Za-z0-9_]*)}")
-
-    if vars is None:
-        vars = {}
-    done = {}
-    notdone = {}
-
-    with codecs.open(filename, encoding='utf-8', errors="surrogateescape") as f:
-        lines = f.readlines()
-
-    for line in lines:
-        if line.startswith('#') or line.strip() == '':
-            continue
-        m = _variable_rx.match(line)
-        if m:
-            n, v = m.group(1, 2)
-            v = v.strip()
-            # `$$' is a literal `$' in make
-            tmpv = v.replace('$$', '')
-
-            if "$" in tmpv:
-                notdone[n] = v
-            else:
-                try:
-                    v = int(v)
-                except ValueError:
-                    # insert literal `$'
-                    done[n] = v.replace('$$', '$')
-                else:
-                    done[n] = v
-
-    # do variable interpolation here
-    variables = list(notdone.keys())
-
-    # Variables with a 'PY_' prefix in the makefile. These need to
-    # be made available without that prefix through sysconfig.
-    # Special care is needed to ensure that variable expansion works, even
-    # if the expansion uses the name without a prefix.
-    renamed_variables = ('CFLAGS', 'LDFLAGS', 'CPPFLAGS')
-
-    while len(variables) > 0:
-        for name in tuple(variables):
-            value = notdone[name]
-            m = _findvar1_rx.search(value) or _findvar2_rx.search(value)
-            if m is not None:
-                n = m.group(1)
-                found = True
-                if n in done:
-                    item = str(done[n])
-                elif n in notdone:
-                    # get it on a subsequent round
-                    found = False
-                elif n in os.environ:
-                    # do it like make: fall back to environment
-                    item = os.environ[n]
-
-                elif n in renamed_variables:
-                    if (name.startswith('PY_') and
-                        name[3:] in renamed_variables):
-                        item = ""
-
-                    elif 'PY_' + n in notdone:
-                        found = False
-
-                    else:
-                        item = str(done['PY_' + n])
-
-                else:
-                    done[n] = item = ""
-
-                if found:
-                    after = value[m.end():]
-                    value = value[:m.start()] + item + after
-                    if "$" in after:
-                        notdone[name] = value
-                    else:
-                        try:
-                            value = int(value)
-                        except ValueError:
-                            done[name] = value.strip()
-                        else:
-                            done[name] = value
-                        variables.remove(name)
-
-                        if (name.startswith('PY_') and
-                            name[3:] in renamed_variables):
-
-                            name = name[3:]
-                            if name not in done:
-                                done[name] = value
-
-            else:
-                # bogus variable reference (e.g. "prefix=$/opt/python");
-                # just drop it since we can't deal
-                done[name] = value
-                variables.remove(name)
-
-    # strip spurious spaces
-    for k, v in done.items():
-        if isinstance(v, str):
-            done[k] = v.strip()
-
-    # save the results in the global dictionary
-    vars.update(done)
-    return vars
-
-
-def get_makefile_filename():
-    """Return the path of the Makefile."""
-    if _PYTHON_BUILD:
-        return os.path.join(_PROJECT_BASE, "Makefile")
-    if hasattr(sys, 'abiflags'):
-        config_dir_name = 'config-%s%s' % (_PY_VERSION_SHORT, sys.abiflags)
-    else:
-        config_dir_name = 'config'
-    return os.path.join(get_path('stdlib'), config_dir_name, 'Makefile')
-
-
-def _init_posix(vars):
-    """Initialize the module as appropriate for POSIX systems."""
-    # load the installed Makefile:
-    makefile = get_makefile_filename()
-    try:
-        _parse_makefile(makefile, vars)
-    except IOError as e:
-        msg = "invalid Python installation: unable to open %s" % makefile
-        if hasattr(e, "strerror"):
-            msg = msg + " (%s)" % e.strerror
-        raise IOError(msg)
-    # load the installed pyconfig.h:
-    config_h = get_config_h_filename()
-    try:
-        with open(config_h) as f:
-            parse_config_h(f, vars)
-    except IOError as e:
-        msg = "invalid Python installation: unable to open %s" % config_h
-        if hasattr(e, "strerror"):
-            msg = msg + " (%s)" % e.strerror
-        raise IOError(msg)
-    # On AIX, there are wrong paths to the linker scripts in the Makefile
-    # -- these paths are relative to the Python source, but when installed
-    # the scripts are in another directory.
-    if _PYTHON_BUILD:
-        vars['LDSHARED'] = vars['BLDSHARED']
-
-
-def _init_non_posix(vars):
-    """Initialize the module as appropriate for NT"""
-    # set basic install directories
-    vars['LIBDEST'] = get_path('stdlib')
-    vars['BINLIBDEST'] = get_path('platstdlib')
-    vars['INCLUDEPY'] = get_path('include')
-    vars['SO'] = '.pyd'
-    vars['EXE'] = '.exe'
-    vars['VERSION'] = _PY_VERSION_SHORT_NO_DOT
-    vars['BINDIR'] = os.path.dirname(_safe_realpath(sys.executable))
-
-#
-# public APIs
-#
-
-
-def parse_config_h(fp, vars=None):
-    """Parse a config.h-style file.
-
-    A dictionary containing name/value pairs is returned.  If an
-    optional dictionary is passed in as the second argument, it is
-    used instead of a new dictionary.
-    """
-    if vars is None:
-        vars = {}
-    define_rx = re.compile("#define ([A-Z][A-Za-z0-9_]+) (.*)\n")
-    undef_rx = re.compile("/[*] #undef ([A-Z][A-Za-z0-9_]+) [*]/\n")
-
-    while True:
-        line = fp.readline()
-        if not line:
-            break
-        m = define_rx.match(line)
-        if m:
-            n, v = m.group(1, 2)
-            try:
-                v = int(v)
-            except ValueError:
-                pass
-            vars[n] = v
-        else:
-            m = undef_rx.match(line)
-            if m:
-                vars[m.group(1)] = 0
-    return vars
-
-
-def get_config_h_filename():
-    """Return the path of pyconfig.h."""
-    if _PYTHON_BUILD:
-        if os.name == "nt":
-            inc_dir = os.path.join(_PROJECT_BASE, "PC")
-        else:
-            inc_dir = _PROJECT_BASE
-    else:
-        inc_dir = get_path('platinclude')
-    return os.path.join(inc_dir, 'pyconfig.h')
-
-
-def get_scheme_names():
-    """Return a tuple containing the schemes names."""
-    return tuple(sorted(_SCHEMES.sections()))
-
-
-def get_path_names():
-    """Return a tuple containing the paths names."""
-    # xxx see if we want a static list
-    return _SCHEMES.options('posix_prefix')
-
-
-def get_paths(scheme=_get_default_scheme(), vars=None, expand=True):
-    """Return a mapping containing an install scheme.
-
-    ``scheme`` is the install scheme name. If not provided, it will
-    return the default scheme for the current platform.
-    """
-    _ensure_cfg_read()
-    if expand:
-        return _expand_vars(scheme, vars)
-    else:
-        return dict(_SCHEMES.items(scheme))
-
-
-def get_path(name, scheme=_get_default_scheme(), vars=None, expand=True):
-    """Return a path corresponding to the scheme.
-
-    ``scheme`` is the install scheme name.
-    """
-    return get_paths(scheme, vars, expand)[name]
-
-
-def get_config_vars(*args):
-    """With no arguments, return a dictionary of all configuration
-    variables relevant for the current platform.
-
-    On Unix, this means every variable defined in Python's installed Makefile;
-    On Windows and Mac OS it's a much smaller set.
-
-    With arguments, return a list of values that result from looking up
-    each argument in the configuration variable dictionary.
-    """
-    global _CONFIG_VARS
-    if _CONFIG_VARS is None:
-        _CONFIG_VARS = {}
-        # Normalized versions of prefix and exec_prefix are handy to have;
-        # in fact, these are the standard versions used most places in the
-        # distutils2 module.
-        _CONFIG_VARS['prefix'] = _PREFIX
-        _CONFIG_VARS['exec_prefix'] = _EXEC_PREFIX
-        _CONFIG_VARS['py_version'] = _PY_VERSION
-        _CONFIG_VARS['py_version_short'] = _PY_VERSION_SHORT
-        _CONFIG_VARS['py_version_nodot'] = _PY_VERSION[0] + _PY_VERSION[2]
-        _CONFIG_VARS['base'] = _PREFIX
-        _CONFIG_VARS['platbase'] = _EXEC_PREFIX
-        _CONFIG_VARS['projectbase'] = _PROJECT_BASE
-        try:
-            _CONFIG_VARS['abiflags'] = sys.abiflags
-        except AttributeError:
-            # sys.abiflags may not be defined on all platforms.
-            _CONFIG_VARS['abiflags'] = ''
-
-        if os.name in ('nt', 'os2'):
-            _init_non_posix(_CONFIG_VARS)
-        if os.name == 'posix':
-            _init_posix(_CONFIG_VARS)
-        # Setting 'userbase' is done below the call to the
-        # init function to enable using 'get_config_var' in
-        # the init-function.
-        if sys.version >= '2.6':
-            _CONFIG_VARS['userbase'] = _getuserbase()
-
-        if 'srcdir' not in _CONFIG_VARS:
-            _CONFIG_VARS['srcdir'] = _PROJECT_BASE
-        else:
-            _CONFIG_VARS['srcdir'] = _safe_realpath(_CONFIG_VARS['srcdir'])
-
-        # Convert srcdir into an absolute path if it appears necessary.
-        # Normally it is relative to the build directory.  However, during
-        # testing, for example, we might be running a non-installed python
-        # from a different directory.
-        if _PYTHON_BUILD and os.name == "posix":
-            base = _PROJECT_BASE
-            try:
-                cwd = os.getcwd()
-            except OSError:
-                cwd = None
-            if (not os.path.isabs(_CONFIG_VARS['srcdir']) and
-                base != cwd):
-                # srcdir is relative and we are not in the same directory
-                # as the executable. Assume executable is in the build
-                # directory and make srcdir absolute.
-                srcdir = os.path.join(base, _CONFIG_VARS['srcdir'])
-                _CONFIG_VARS['srcdir'] = os.path.normpath(srcdir)
-
-        if sys.platform == 'darwin':
-            kernel_version = os.uname()[2]  # Kernel version (8.4.3)
-            major_version = int(kernel_version.split('.')[0])
-
-            if major_version < 8:
-                # On Mac OS X before 10.4, check if -arch and -isysroot
-                # are in CFLAGS or LDFLAGS and remove them if they are.
-                # This is needed when building extensions on a 10.3 system
-                # using a universal build of python.
-                for key in ('LDFLAGS', 'BASECFLAGS',
-                        # a number of derived variables. These need to be
-                        # patched up as well.
-                        'CFLAGS', 'PY_CFLAGS', 'BLDSHARED'):
-                    flags = _CONFIG_VARS[key]
-                    flags = re.sub(r'-arch\s+\w+\s', ' ', flags)
-                    flags = re.sub('-isysroot [^ \t]*', ' ', flags)
-                    _CONFIG_VARS[key] = flags
-            else:
-                # Allow the user to override the architecture flags using
-                # an environment variable.
-                # NOTE: This name was introduced by Apple in OSX 10.5 and
-                # is used by several scripting languages distributed with
-                # that OS release.
-                if 'ARCHFLAGS' in os.environ:
-                    arch = os.environ['ARCHFLAGS']
-                    for key in ('LDFLAGS', 'BASECFLAGS',
-                        # a number of derived variables. These need to be
-                        # patched up as well.
-                        'CFLAGS', 'PY_CFLAGS', 'BLDSHARED'):
-
-                        flags = _CONFIG_VARS[key]
-                        flags = re.sub(r'-arch\s+\w+\s', ' ', flags)
-                        flags = flags + ' ' + arch
-                        _CONFIG_VARS[key] = flags
-
-                # If we're on OSX 10.5 or later and the user tries to
-                # compiles an extension using an SDK that is not present
-                # on the current machine it is better to not use an SDK
-                # than to fail.
-                #
-                # The major usecase for this is users using a Python.org
-                # binary installer  on OSX 10.6: that installer uses
-                # the 10.4u SDK, but that SDK is not installed by default
-                # when you install Xcode.
-                #
-                CFLAGS = _CONFIG_VARS.get('CFLAGS', '')
-                m = re.search(r'-isysroot\s+(\S+)', CFLAGS)
-                if m is not None:
-                    sdk = m.group(1)
-                    if not os.path.exists(sdk):
-                        for key in ('LDFLAGS', 'BASECFLAGS',
-                             # a number of derived variables. These need to be
-                             # patched up as well.
-                            'CFLAGS', 'PY_CFLAGS', 'BLDSHARED'):
-
-                            flags = _CONFIG_VARS[key]
-                            flags = re.sub(r'-isysroot\s+\S+(\s|$)', ' ', flags)
-                            _CONFIG_VARS[key] = flags
-
-    if args:
-        vals = []
-        for name in args:
-            vals.append(_CONFIG_VARS.get(name))
-        return vals
-    else:
-        return _CONFIG_VARS
-
-
-def get_config_var(name):
-    """Return the value of a single variable using the dictionary returned by
-    'get_config_vars()'.
-
-    Equivalent to get_config_vars().get(name)
-    """
-    return get_config_vars().get(name)
-
-
-def get_platform():
-    """Return a string that identifies the current platform.
-
-    This is used mainly to distinguish platform-specific build directories and
-    platform-specific built distributions.  Typically includes the OS name
-    and version and the architecture (as supplied by 'os.uname()'),
-    although the exact information included depends on the OS; eg. for IRIX
-    the architecture isn't particularly important (IRIX only runs on SGI
-    hardware), but for Linux the kernel version isn't particularly
-    important.
-
-    Examples of returned values:
-       linux-i586
-       linux-alpha (?)
-       solaris-2.6-sun4u
-       irix-5.3
-       irix64-6.2
-
-    Windows will return one of:
-       win-amd64 (64bit Windows on AMD64 (aka x86_64, Intel64, EM64T, etc)
-       win-ia64 (64bit Windows on Itanium)
-       win32 (all others - specifically, sys.platform is returned)
-
-    For other non-POSIX platforms, currently just returns 'sys.platform'.
-    """
-    if os.name == 'nt':
-        # sniff sys.version for architecture.
-        prefix = " bit ("
-        i = sys.version.find(prefix)
-        if i == -1:
-            return sys.platform
-        j = sys.version.find(")", i)
-        look = sys.version[i+len(prefix):j].lower()
-        if look == 'amd64':
-            return 'win-amd64'
-        if look == 'itanium':
-            return 'win-ia64'
-        return sys.platform
-
-    if os.name != "posix" or not hasattr(os, 'uname'):
-        # XXX what about the architecture? NT is Intel or Alpha,
-        # Mac OS is M68k or PPC, etc.
-        return sys.platform
-
-    # Try to distinguish various flavours of Unix
-    osname, host, release, version, machine = os.uname()
-
-    # Convert the OS name to lowercase, remove '/' characters
-    # (to accommodate BSD/OS), and translate spaces (for "Power Macintosh")
-    osname = osname.lower().replace('/', '')
-    machine = machine.replace(' ', '_')
-    machine = machine.replace('/', '-')
-
-    if osname[:5] == "linux":
-        # At least on Linux/Intel, 'machine' is the processor --
-        # i386, etc.
-        # XXX what about Alpha, SPARC, etc?
-        return  "%s-%s" % (osname, machine)
-    elif osname[:5] == "sunos":
-        if release[0] >= "5":           # SunOS 5 == Solaris 2
-            osname = "solaris"
-            release = "%d.%s" % (int(release[0]) - 3, release[2:])
-        # fall through to standard osname-release-machine representation
-    elif osname[:4] == "irix":              # could be "irix64"!
-        return "%s-%s" % (osname, release)
-    elif osname[:3] == "aix":
-        return "%s-%s.%s" % (osname, version, release)
-    elif osname[:6] == "cygwin":
-        osname = "cygwin"
-        rel_re = re.compile(r'[\d.]+')
-        m = rel_re.match(release)
-        if m:
-            release = m.group()
-    elif osname[:6] == "darwin":
-        #
-        # For our purposes, we'll assume that the system version from
-        # distutils' perspective is what MACOSX_DEPLOYMENT_TARGET is set
-        # to. This makes the compatibility story a bit more sane because the
-        # machine is going to compile and link as if it were
-        # MACOSX_DEPLOYMENT_TARGET.
-        cfgvars = get_config_vars()
-        macver = cfgvars.get('MACOSX_DEPLOYMENT_TARGET')
-
-        if True:
-            # Always calculate the release of the running machine,
-            # needed to determine if we can build fat binaries or not.
-
-            macrelease = macver
-            # Get the system version. Reading this plist is a documented
-            # way to get the system version (see the documentation for
-            # the Gestalt Manager)
-            try:
-                f = open('/System/Library/CoreServices/SystemVersion.plist')
-            except IOError:
-                # We're on a plain darwin box, fall back to the default
-                # behaviour.
-                pass
-            else:
-                try:
-                    m = re.search(r'<key>ProductUserVisibleVersion</key>\s*'
-                                  r'<string>(.*?)</string>', f.read())
-                finally:
-                    f.close()
-                if m is not None:
-                    macrelease = '.'.join(m.group(1).split('.')[:2])
-                # else: fall back to the default behaviour
-
-        if not macver:
-            macver = macrelease
-
-        if macver:
-            release = macver
-            osname = "macosx"
-
-            if ((macrelease + '.') >= '10.4.' and
-                '-arch' in get_config_vars().get('CFLAGS', '').strip()):
-                # The universal build will build fat binaries, but not on
-                # systems before 10.4
-                #
-                # Try to detect 4-way universal builds, those have machine-type
-                # 'universal' instead of 'fat'.
-
-                machine = 'fat'
-                cflags = get_config_vars().get('CFLAGS')
-
-                archs = re.findall(r'-arch\s+(\S+)', cflags)
-                archs = tuple(sorted(set(archs)))
-
-                if len(archs) == 1:
-                    machine = archs[0]
-                elif archs == ('i386', 'ppc'):
-                    machine = 'fat'
-                elif archs == ('i386', 'x86_64'):
-                    machine = 'intel'
-                elif archs == ('i386', 'ppc', 'x86_64'):
-                    machine = 'fat3'
-                elif archs == ('ppc64', 'x86_64'):
-                    machine = 'fat64'
-                elif archs == ('i386', 'ppc', 'ppc64', 'x86_64'):
-                    machine = 'universal'
-                else:
-                    raise ValueError(
-                       "Don't know machine value for archs=%r" % (archs,))
-
-            elif machine == 'i386':
-                # On OSX the machine type returned by uname is always the
-                # 32-bit variant, even if the executable architecture is
-                # the 64-bit variant
-                if sys.maxsize >= 2**32:
-                    machine = 'x86_64'
-
-            elif machine in ('PowerPC', 'Power_Macintosh'):
-                # Pick a sane name for the PPC architecture.
-                # See 'i386' case
-                if sys.maxsize >= 2**32:
-                    machine = 'ppc64'
-                else:
-                    machine = 'ppc'
-
-    return "%s-%s-%s" % (osname, release, machine)
-
-
-def get_python_version():
-    return _PY_VERSION_SHORT
-
-
-def _print_dict(title, data):
-    for index, (key, value) in enumerate(sorted(data.items())):
-        if index == 0:
-            print('%s: ' % (title))
-        print('\t%s = "%s"' % (key, value))
-
-
-def _main():
-    """Display all information sysconfig detains."""
-    print('Platform: "%s"' % get_platform())
-    print('Python version: "%s"' % get_python_version())
-    print('Current installation scheme: "%s"' % _get_default_scheme())
-    print()
-    _print_dict('Paths', get_paths())
-    print()
-    _print_dict('Variables', get_config_vars())
-
-
-if __name__ == '__main__':
-    _main()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/_backport/tarfile.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/_backport/tarfile.py
deleted file mode 100644
index d66d856..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/_backport/tarfile.py
+++ /dev/null
@@ -1,2607 +0,0 @@
-#-------------------------------------------------------------------
-# tarfile.py
-#-------------------------------------------------------------------
-# Copyright (C) 2002 Lars Gustaebel <lars@gustaebel.de>
-# All rights reserved.
-#
-# Permission  is  hereby granted,  free  of charge,  to  any person
-# obtaining a  copy of  this software  and associated documentation
-# files  (the  "Software"),  to   deal  in  the  Software   without
-# restriction,  including  without limitation  the  rights to  use,
-# copy, modify, merge, publish, distribute, sublicense, and/or sell
-# copies  of  the  Software,  and to  permit  persons  to  whom the
-# Software  is  furnished  to  do  so,  subject  to  the  following
-# conditions:
-#
-# The above copyright  notice and this  permission notice shall  be
-# included in all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS  IS", WITHOUT WARRANTY OF ANY  KIND,
-# EXPRESS OR IMPLIED, INCLUDING  BUT NOT LIMITED TO  THE WARRANTIES
-# OF  MERCHANTABILITY,  FITNESS   FOR  A  PARTICULAR   PURPOSE  AND
-# NONINFRINGEMENT.  IN  NO  EVENT SHALL  THE  AUTHORS  OR COPYRIGHT
-# HOLDERS  BE LIABLE  FOR ANY  CLAIM, DAMAGES  OR OTHER  LIABILITY,
-# WHETHER  IN AN  ACTION OF  CONTRACT, TORT  OR OTHERWISE,  ARISING
-# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
-# OTHER DEALINGS IN THE SOFTWARE.
-#
-from __future__ import print_function
-
-"""Read from and write to tar format archives.
-"""
-
-__version__ = "$Revision$"
-
-version     = "0.9.0"
-__author__  = "Lars Gust\u00e4bel (lars@gustaebel.de)"
-__date__    = "$Date: 2011-02-25 17:42:01 +0200 (Fri, 25 Feb 2011) $"
-__cvsid__   = "$Id: tarfile.py 88586 2011-02-25 15:42:01Z marc-andre.lemburg $"
-__credits__ = "Gustavo Niemeyer, Niels Gust\u00e4bel, Richard Townsend."
-
-#---------
-# Imports
-#---------
-import sys
-import os
-import stat
-import errno
-import time
-import struct
-import copy
-import re
-
-try:
-    import grp, pwd
-except ImportError:
-    grp = pwd = None
-
-# os.symlink on Windows prior to 6.0 raises NotImplementedError
-symlink_exception = (AttributeError, NotImplementedError)
-try:
-    # WindowsError (1314) will be raised if the caller does not hold the
-    # SeCreateSymbolicLinkPrivilege privilege
-    symlink_exception += (WindowsError,)
-except NameError:
-    pass
-
-# from tarfile import *
-__all__ = ["TarFile", "TarInfo", "is_tarfile", "TarError"]
-
-if sys.version_info[0] < 3:
-    import __builtin__ as builtins
-else:
-    import builtins
-
-_open = builtins.open   # Since 'open' is TarFile.open
-
-#---------------------------------------------------------
-# tar constants
-#---------------------------------------------------------
-NUL = b"\0"                     # the null character
-BLOCKSIZE = 512                 # length of processing blocks
-RECORDSIZE = BLOCKSIZE * 20     # length of records
-GNU_MAGIC = b"ustar  \0"        # magic gnu tar string
-POSIX_MAGIC = b"ustar\x0000"    # magic posix tar string
-
-LENGTH_NAME = 100               # maximum length of a filename
-LENGTH_LINK = 100               # maximum length of a linkname
-LENGTH_PREFIX = 155             # maximum length of the prefix field
-
-REGTYPE = b"0"                  # regular file
-AREGTYPE = b"\0"                # regular file
-LNKTYPE = b"1"                  # link (inside tarfile)
-SYMTYPE = b"2"                  # symbolic link
-CHRTYPE = b"3"                  # character special device
-BLKTYPE = b"4"                  # block special device
-DIRTYPE = b"5"                  # directory
-FIFOTYPE = b"6"                 # fifo special device
-CONTTYPE = b"7"                 # contiguous file
-
-GNUTYPE_LONGNAME = b"L"         # GNU tar longname
-GNUTYPE_LONGLINK = b"K"         # GNU tar longlink
-GNUTYPE_SPARSE = b"S"           # GNU tar sparse file
-
-XHDTYPE = b"x"                  # POSIX.1-2001 extended header
-XGLTYPE = b"g"                  # POSIX.1-2001 global header
-SOLARIS_XHDTYPE = b"X"          # Solaris extended header
-
-USTAR_FORMAT = 0                # POSIX.1-1988 (ustar) format
-GNU_FORMAT = 1                  # GNU tar format
-PAX_FORMAT = 2                  # POSIX.1-2001 (pax) format
-DEFAULT_FORMAT = GNU_FORMAT
-
-#---------------------------------------------------------
-# tarfile constants
-#---------------------------------------------------------
-# File types that tarfile supports:
-SUPPORTED_TYPES = (REGTYPE, AREGTYPE, LNKTYPE,
-                   SYMTYPE, DIRTYPE, FIFOTYPE,
-                   CONTTYPE, CHRTYPE, BLKTYPE,
-                   GNUTYPE_LONGNAME, GNUTYPE_LONGLINK,
-                   GNUTYPE_SPARSE)
-
-# File types that will be treated as a regular file.
-REGULAR_TYPES = (REGTYPE, AREGTYPE,
-                 CONTTYPE, GNUTYPE_SPARSE)
-
-# File types that are part of the GNU tar format.
-GNU_TYPES = (GNUTYPE_LONGNAME, GNUTYPE_LONGLINK,
-             GNUTYPE_SPARSE)
-
-# Fields from a pax header that override a TarInfo attribute.
-PAX_FIELDS = ("path", "linkpath", "size", "mtime",
-              "uid", "gid", "uname", "gname")
-
-# Fields from a pax header that are affected by hdrcharset.
-PAX_NAME_FIELDS = set(("path", "linkpath", "uname", "gname"))
-
-# Fields in a pax header that are numbers, all other fields
-# are treated as strings.
-PAX_NUMBER_FIELDS = {
-    "atime": float,
-    "ctime": float,
-    "mtime": float,
-    "uid": int,
-    "gid": int,
-    "size": int
-}
-
-#---------------------------------------------------------
-# Bits used in the mode field, values in octal.
-#---------------------------------------------------------
-S_IFLNK = 0o120000        # symbolic link
-S_IFREG = 0o100000        # regular file
-S_IFBLK = 0o060000        # block device
-S_IFDIR = 0o040000        # directory
-S_IFCHR = 0o020000        # character device
-S_IFIFO = 0o010000        # fifo
-
-TSUID   = 0o4000          # set UID on execution
-TSGID   = 0o2000          # set GID on execution
-TSVTX   = 0o1000          # reserved
-
-TUREAD  = 0o400           # read by owner
-TUWRITE = 0o200           # write by owner
-TUEXEC  = 0o100           # execute/search by owner
-TGREAD  = 0o040           # read by group
-TGWRITE = 0o020           # write by group
-TGEXEC  = 0o010           # execute/search by group
-TOREAD  = 0o004           # read by other
-TOWRITE = 0o002           # write by other
-TOEXEC  = 0o001           # execute/search by other
-
-#---------------------------------------------------------
-# initialization
-#---------------------------------------------------------
-if os.name in ("nt", "ce"):
-    ENCODING = "utf-8"
-else:
-    ENCODING = sys.getfilesystemencoding()
-
-#---------------------------------------------------------
-# Some useful functions
-#---------------------------------------------------------
-
-def stn(s, length, encoding, errors):
-    """Convert a string to a null-terminated bytes object.
-    """
-    s = s.encode(encoding, errors)
-    return s[:length] + (length - len(s)) * NUL
-
-def nts(s, encoding, errors):
-    """Convert a null-terminated bytes object to a string.
-    """
-    p = s.find(b"\0")
-    if p != -1:
-        s = s[:p]
-    return s.decode(encoding, errors)
-
-def nti(s):
-    """Convert a number field to a python number.
-    """
-    # There are two possible encodings for a number field, see
-    # itn() below.
-    if s[0] != chr(0o200):
-        try:
-            n = int(nts(s, "ascii", "strict") or "0", 8)
-        except ValueError:
-            raise InvalidHeaderError("invalid header")
-    else:
-        n = 0
-        for i in range(len(s) - 1):
-            n <<= 8
-            n += ord(s[i + 1])
-    return n
-
-def itn(n, digits=8, format=DEFAULT_FORMAT):
-    """Convert a python number to a number field.
-    """
-    # POSIX 1003.1-1988 requires numbers to be encoded as a string of
-    # octal digits followed by a null-byte, this allows values up to
-    # (8**(digits-1))-1. GNU tar allows storing numbers greater than
-    # that if necessary. A leading 0o200 byte indicates this particular
-    # encoding, the following digits-1 bytes are a big-endian
-    # representation. This allows values up to (256**(digits-1))-1.
-    if 0 <= n < 8 ** (digits - 1):
-        s = ("%0*o" % (digits - 1, n)).encode("ascii") + NUL
-    else:
-        if format != GNU_FORMAT or n >= 256 ** (digits - 1):
-            raise ValueError("overflow in number field")
-
-        if n < 0:
-            # XXX We mimic GNU tar's behaviour with negative numbers,
-            # this could raise OverflowError.
-            n = struct.unpack("L", struct.pack("l", n))[0]
-
-        s = bytearray()
-        for i in range(digits - 1):
-            s.insert(0, n & 0o377)
-            n >>= 8
-        s.insert(0, 0o200)
-    return s
-
-def calc_chksums(buf):
-    """Calculate the checksum for a member's header by summing up all
-       characters except for the chksum field which is treated as if
-       it was filled with spaces. According to the GNU tar sources,
-       some tars (Sun and NeXT) calculate chksum with signed char,
-       which will be different if there are chars in the buffer with
-       the high bit set. So we calculate two checksums, unsigned and
-       signed.
-    """
-    unsigned_chksum = 256 + sum(struct.unpack("148B", buf[:148]) + struct.unpack("356B", buf[156:512]))
-    signed_chksum = 256 + sum(struct.unpack("148b", buf[:148]) + struct.unpack("356b", buf[156:512]))
-    return unsigned_chksum, signed_chksum
-
-def copyfileobj(src, dst, length=None):
-    """Copy length bytes from fileobj src to fileobj dst.
-       If length is None, copy the entire content.
-    """
-    if length == 0:
-        return
-    if length is None:
-        while True:
-            buf = src.read(16*1024)
-            if not buf:
-                break
-            dst.write(buf)
-        return
-
-    BUFSIZE = 16 * 1024
-    blocks, remainder = divmod(length, BUFSIZE)
-    for b in range(blocks):
-        buf = src.read(BUFSIZE)
-        if len(buf) < BUFSIZE:
-            raise IOError("end of file reached")
-        dst.write(buf)
-
-    if remainder != 0:
-        buf = src.read(remainder)
-        if len(buf) < remainder:
-            raise IOError("end of file reached")
-        dst.write(buf)
-    return
-
-filemode_table = (
-    ((S_IFLNK,      "l"),
-     (S_IFREG,      "-"),
-     (S_IFBLK,      "b"),
-     (S_IFDIR,      "d"),
-     (S_IFCHR,      "c"),
-     (S_IFIFO,      "p")),
-
-    ((TUREAD,       "r"),),
-    ((TUWRITE,      "w"),),
-    ((TUEXEC|TSUID, "s"),
-     (TSUID,        "S"),
-     (TUEXEC,       "x")),
-
-    ((TGREAD,       "r"),),
-    ((TGWRITE,      "w"),),
-    ((TGEXEC|TSGID, "s"),
-     (TSGID,        "S"),
-     (TGEXEC,       "x")),
-
-    ((TOREAD,       "r"),),
-    ((TOWRITE,      "w"),),
-    ((TOEXEC|TSVTX, "t"),
-     (TSVTX,        "T"),
-     (TOEXEC,       "x"))
-)
-
-def filemode(mode):
-    """Convert a file's mode to a string of the form
-       -rwxrwxrwx.
-       Used by TarFile.list()
-    """
-    perm = []
-    for table in filemode_table:
-        for bit, char in table:
-            if mode & bit == bit:
-                perm.append(char)
-                break
-        else:
-            perm.append("-")
-    return "".join(perm)
-
-class TarError(Exception):
-    """Base exception."""
-    pass
-class ExtractError(TarError):
-    """General exception for extract errors."""
-    pass
-class ReadError(TarError):
-    """Exception for unreadable tar archives."""
-    pass
-class CompressionError(TarError):
-    """Exception for unavailable compression methods."""
-    pass
-class StreamError(TarError):
-    """Exception for unsupported operations on stream-like TarFiles."""
-    pass
-class HeaderError(TarError):
-    """Base exception for header errors."""
-    pass
-class EmptyHeaderError(HeaderError):
-    """Exception for empty headers."""
-    pass
-class TruncatedHeaderError(HeaderError):
-    """Exception for truncated headers."""
-    pass
-class EOFHeaderError(HeaderError):
-    """Exception for end of file headers."""
-    pass
-class InvalidHeaderError(HeaderError):
-    """Exception for invalid headers."""
-    pass
-class SubsequentHeaderError(HeaderError):
-    """Exception for missing and invalid extended headers."""
-    pass
-
-#---------------------------
-# internal stream interface
-#---------------------------
-class _LowLevelFile(object):
-    """Low-level file object. Supports reading and writing.
-       It is used instead of a regular file object for streaming
-       access.
-    """
-
-    def __init__(self, name, mode):
-        mode = {
-            "r": os.O_RDONLY,
-            "w": os.O_WRONLY | os.O_CREAT | os.O_TRUNC,
-        }[mode]
-        if hasattr(os, "O_BINARY"):
-            mode |= os.O_BINARY
-        self.fd = os.open(name, mode, 0o666)
-
-    def close(self):
-        os.close(self.fd)
-
-    def read(self, size):
-        return os.read(self.fd, size)
-
-    def write(self, s):
-        os.write(self.fd, s)
-
-class _Stream(object):
-    """Class that serves as an adapter between TarFile and
-       a stream-like object.  The stream-like object only
-       needs to have a read() or write() method and is accessed
-       blockwise.  Use of gzip or bzip2 compression is possible.
-       A stream-like object could be for example: sys.stdin,
-       sys.stdout, a socket, a tape device etc.
-
-       _Stream is intended to be used only internally.
-    """
-
-    def __init__(self, name, mode, comptype, fileobj, bufsize):
-        """Construct a _Stream object.
-        """
-        self._extfileobj = True
-        if fileobj is None:
-            fileobj = _LowLevelFile(name, mode)
-            self._extfileobj = False
-
-        if comptype == '*':
-            # Enable transparent compression detection for the
-            # stream interface
-            fileobj = _StreamProxy(fileobj)
-            comptype = fileobj.getcomptype()
-
-        self.name     = name or ""
-        self.mode     = mode
-        self.comptype = comptype
-        self.fileobj  = fileobj
-        self.bufsize  = bufsize
-        self.buf      = b""
-        self.pos      = 0
-        self.closed   = False
-
-        try:
-            if comptype == "gz":
-                try:
-                    import zlib
-                except ImportError:
-                    raise CompressionError("zlib module is not available")
-                self.zlib = zlib
-                self.crc = zlib.crc32(b"")
-                if mode == "r":
-                    self._init_read_gz()
-                else:
-                    self._init_write_gz()
-
-            if comptype == "bz2":
-                try:
-                    import bz2
-                except ImportError:
-                    raise CompressionError("bz2 module is not available")
-                if mode == "r":
-                    self.dbuf = b""
-                    self.cmp = bz2.BZ2Decompressor()
-                else:
-                    self.cmp = bz2.BZ2Compressor()
-        except:
-            if not self._extfileobj:
-                self.fileobj.close()
-            self.closed = True
-            raise
-
-    def __del__(self):
-        if hasattr(self, "closed") and not self.closed:
-            self.close()
-
-    def _init_write_gz(self):
-        """Initialize for writing with gzip compression.
-        """
-        self.cmp = self.zlib.compressobj(9, self.zlib.DEFLATED,
-                                            -self.zlib.MAX_WBITS,
-                                            self.zlib.DEF_MEM_LEVEL,
-                                            0)
-        timestamp = struct.pack("<L", int(time.time()))
-        self.__write(b"\037\213\010\010" + timestamp + b"\002\377")
-        if self.name.endswith(".gz"):
-            self.name = self.name[:-3]
-        # RFC1952 says we must use ISO-8859-1 for the FNAME field.
-        self.__write(self.name.encode("iso-8859-1", "replace") + NUL)
-
-    def write(self, s):
-        """Write string s to the stream.
-        """
-        if self.comptype == "gz":
-            self.crc = self.zlib.crc32(s, self.crc)
-        self.pos += len(s)
-        if self.comptype != "tar":
-            s = self.cmp.compress(s)
-        self.__write(s)
-
-    def __write(self, s):
-        """Write string s to the stream if a whole new block
-           is ready to be written.
-        """
-        self.buf += s
-        while len(self.buf) > self.bufsize:
-            self.fileobj.write(self.buf[:self.bufsize])
-            self.buf = self.buf[self.bufsize:]
-
-    def close(self):
-        """Close the _Stream object. No operation should be
-           done on it afterwards.
-        """
-        if self.closed:
-            return
-
-        if self.mode == "w" and self.comptype != "tar":
-            self.buf += self.cmp.flush()
-
-        if self.mode == "w" and self.buf:
-            self.fileobj.write(self.buf)
-            self.buf = b""
-            if self.comptype == "gz":
-                # The native zlib crc is an unsigned 32-bit integer, but
-                # the Python wrapper implicitly casts that to a signed C
-                # long.  So, on a 32-bit box self.crc may "look negative",
-                # while the same crc on a 64-bit box may "look positive".
-                # To avoid irksome warnings from the `struct` module, force
-                # it to look positive on all boxes.
-                self.fileobj.write(struct.pack("<L", self.crc & 0xffffffff))
-                self.fileobj.write(struct.pack("<L", self.pos & 0xffffFFFF))
-
-        if not self._extfileobj:
-            self.fileobj.close()
-
-        self.closed = True
-
-    def _init_read_gz(self):
-        """Initialize for reading a gzip compressed fileobj.
-        """
-        self.cmp = self.zlib.decompressobj(-self.zlib.MAX_WBITS)
-        self.dbuf = b""
-
-        # taken from gzip.GzipFile with some alterations
-        if self.__read(2) != b"\037\213":
-            raise ReadError("not a gzip file")
-        if self.__read(1) != b"\010":
-            raise CompressionError("unsupported compression method")
-
-        flag = ord(self.__read(1))
-        self.__read(6)
-
-        if flag & 4:
-            xlen = ord(self.__read(1)) + 256 * ord(self.__read(1))
-            self.read(xlen)
-        if flag & 8:
-            while True:
-                s = self.__read(1)
-                if not s or s == NUL:
-                    break
-        if flag & 16:
-            while True:
-                s = self.__read(1)
-                if not s or s == NUL:
-                    break
-        if flag & 2:
-            self.__read(2)
-
-    def tell(self):
-        """Return the stream's file pointer position.
-        """
-        return self.pos
-
-    def seek(self, pos=0):
-        """Set the stream's file pointer to pos. Negative seeking
-           is forbidden.
-        """
-        if pos - self.pos >= 0:
-            blocks, remainder = divmod(pos - self.pos, self.bufsize)
-            for i in range(blocks):
-                self.read(self.bufsize)
-            self.read(remainder)
-        else:
-            raise StreamError("seeking backwards is not allowed")
-        return self.pos
-
-    def read(self, size=None):
-        """Return the next size number of bytes from the stream.
-           If size is not defined, return all bytes of the stream
-           up to EOF.
-        """
-        if size is None:
-            t = []
-            while True:
-                buf = self._read(self.bufsize)
-                if not buf:
-                    break
-                t.append(buf)
-            buf = "".join(t)
-        else:
-            buf = self._read(size)
-        self.pos += len(buf)
-        return buf
-
-    def _read(self, size):
-        """Return size bytes from the stream.
-        """
-        if self.comptype == "tar":
-            return self.__read(size)
-
-        c = len(self.dbuf)
-        while c < size:
-            buf = self.__read(self.bufsize)
-            if not buf:
-                break
-            try:
-                buf = self.cmp.decompress(buf)
-            except IOError:
-                raise ReadError("invalid compressed data")
-            self.dbuf += buf
-            c += len(buf)
-        buf = self.dbuf[:size]
-        self.dbuf = self.dbuf[size:]
-        return buf
-
-    def __read(self, size):
-        """Return size bytes from stream. If internal buffer is empty,
-           read another block from the stream.
-        """
-        c = len(self.buf)
-        while c < size:
-            buf = self.fileobj.read(self.bufsize)
-            if not buf:
-                break
-            self.buf += buf
-            c += len(buf)
-        buf = self.buf[:size]
-        self.buf = self.buf[size:]
-        return buf
-# class _Stream
-
-class _StreamProxy(object):
-    """Small proxy class that enables transparent compression
-       detection for the Stream interface (mode 'r|*').
-    """
-
-    def __init__(self, fileobj):
-        self.fileobj = fileobj
-        self.buf = self.fileobj.read(BLOCKSIZE)
-
-    def read(self, size):
-        self.read = self.fileobj.read
-        return self.buf
-
-    def getcomptype(self):
-        if self.buf.startswith(b"\037\213\010"):
-            return "gz"
-        if self.buf.startswith(b"BZh91"):
-            return "bz2"
-        return "tar"
-
-    def close(self):
-        self.fileobj.close()
-# class StreamProxy
-
-class _BZ2Proxy(object):
-    """Small proxy class that enables external file object
-       support for "r:bz2" and "w:bz2" modes. This is actually
-       a workaround for a limitation in bz2 module's BZ2File
-       class which (unlike gzip.GzipFile) has no support for
-       a file object argument.
-    """
-
-    blocksize = 16 * 1024
-
-    def __init__(self, fileobj, mode):
-        self.fileobj = fileobj
-        self.mode = mode
-        self.name = getattr(self.fileobj, "name", None)
-        self.init()
-
-    def init(self):
-        import bz2
-        self.pos = 0
-        if self.mode == "r":
-            self.bz2obj = bz2.BZ2Decompressor()
-            self.fileobj.seek(0)
-            self.buf = b""
-        else:
-            self.bz2obj = bz2.BZ2Compressor()
-
-    def read(self, size):
-        x = len(self.buf)
-        while x < size:
-            raw = self.fileobj.read(self.blocksize)
-            if not raw:
-                break
-            data = self.bz2obj.decompress(raw)
-            self.buf += data
-            x += len(data)
-
-        buf = self.buf[:size]
-        self.buf = self.buf[size:]
-        self.pos += len(buf)
-        return buf
-
-    def seek(self, pos):
-        if pos < self.pos:
-            self.init()
-        self.read(pos - self.pos)
-
-    def tell(self):
-        return self.pos
-
-    def write(self, data):
-        self.pos += len(data)
-        raw = self.bz2obj.compress(data)
-        self.fileobj.write(raw)
-
-    def close(self):
-        if self.mode == "w":
-            raw = self.bz2obj.flush()
-            self.fileobj.write(raw)
-# class _BZ2Proxy
-
-#------------------------
-# Extraction file object
-#------------------------
-class _FileInFile(object):
-    """A thin wrapper around an existing file object that
-       provides a part of its data as an individual file
-       object.
-    """
-
-    def __init__(self, fileobj, offset, size, blockinfo=None):
-        self.fileobj = fileobj
-        self.offset = offset
-        self.size = size
-        self.position = 0
-
-        if blockinfo is None:
-            blockinfo = [(0, size)]
-
-        # Construct a map with data and zero blocks.
-        self.map_index = 0
-        self.map = []
-        lastpos = 0
-        realpos = self.offset
-        for offset, size in blockinfo:
-            if offset > lastpos:
-                self.map.append((False, lastpos, offset, None))
-            self.map.append((True, offset, offset + size, realpos))
-            realpos += size
-            lastpos = offset + size
-        if lastpos < self.size:
-            self.map.append((False, lastpos, self.size, None))
-
-    def seekable(self):
-        if not hasattr(self.fileobj, "seekable"):
-            # XXX gzip.GzipFile and bz2.BZ2File
-            return True
-        return self.fileobj.seekable()
-
-    def tell(self):
-        """Return the current file position.
-        """
-        return self.position
-
-    def seek(self, position):
-        """Seek to a position in the file.
-        """
-        self.position = position
-
-    def read(self, size=None):
-        """Read data from the file.
-        """
-        if size is None:
-            size = self.size - self.position
-        else:
-            size = min(size, self.size - self.position)
-
-        buf = b""
-        while size > 0:
-            while True:
-                data, start, stop, offset = self.map[self.map_index]
-                if start <= self.position < stop:
-                    break
-                else:
-                    self.map_index += 1
-                    if self.map_index == len(self.map):
-                        self.map_index = 0
-            length = min(size, stop - self.position)
-            if data:
-                self.fileobj.seek(offset + (self.position - start))
-                buf += self.fileobj.read(length)
-            else:
-                buf += NUL * length
-            size -= length
-            self.position += length
-        return buf
-#class _FileInFile
-
-
-class ExFileObject(object):
-    """File-like object for reading an archive member.
-       Is returned by TarFile.extractfile().
-    """
-    blocksize = 1024
-
-    def __init__(self, tarfile, tarinfo):
-        self.fileobj = _FileInFile(tarfile.fileobj,
-                                   tarinfo.offset_data,
-                                   tarinfo.size,
-                                   tarinfo.sparse)
-        self.name = tarinfo.name
-        self.mode = "r"
-        self.closed = False
-        self.size = tarinfo.size
-
-        self.position = 0
-        self.buffer = b""
-
-    def readable(self):
-        return True
-
-    def writable(self):
-        return False
-
-    def seekable(self):
-        return self.fileobj.seekable()
-
-    def read(self, size=None):
-        """Read at most size bytes from the file. If size is not
-           present or None, read all data until EOF is reached.
-        """
-        if self.closed:
-            raise ValueError("I/O operation on closed file")
-
-        buf = b""
-        if self.buffer:
-            if size is None:
-                buf = self.buffer
-                self.buffer = b""
-            else:
-                buf = self.buffer[:size]
-                self.buffer = self.buffer[size:]
-
-        if size is None:
-            buf += self.fileobj.read()
-        else:
-            buf += self.fileobj.read(size - len(buf))
-
-        self.position += len(buf)
-        return buf
-
-    # XXX TextIOWrapper uses the read1() method.
-    read1 = read
-
-    def readline(self, size=-1):
-        """Read one entire line from the file. If size is present
-           and non-negative, return a string with at most that
-           size, which may be an incomplete line.
-        """
-        if self.closed:
-            raise ValueError("I/O operation on closed file")
-
-        pos = self.buffer.find(b"\n") + 1
-        if pos == 0:
-            # no newline found.
-            while True:
-                buf = self.fileobj.read(self.blocksize)
-                self.buffer += buf
-                if not buf or b"\n" in buf:
-                    pos = self.buffer.find(b"\n") + 1
-                    if pos == 0:
-                        # no newline found.
-                        pos = len(self.buffer)
-                    break
-
-        if size != -1:
-            pos = min(size, pos)
-
-        buf = self.buffer[:pos]
-        self.buffer = self.buffer[pos:]
-        self.position += len(buf)
-        return buf
-
-    def readlines(self):
-        """Return a list with all remaining lines.
-        """
-        result = []
-        while True:
-            line = self.readline()
-            if not line: break
-            result.append(line)
-        return result
-
-    def tell(self):
-        """Return the current file position.
-        """
-        if self.closed:
-            raise ValueError("I/O operation on closed file")
-
-        return self.position
-
-    def seek(self, pos, whence=os.SEEK_SET):
-        """Seek to a position in the file.
-        """
-        if self.closed:
-            raise ValueError("I/O operation on closed file")
-
-        if whence == os.SEEK_SET:
-            self.position = min(max(pos, 0), self.size)
-        elif whence == os.SEEK_CUR:
-            if pos < 0:
-                self.position = max(self.position + pos, 0)
-            else:
-                self.position = min(self.position + pos, self.size)
-        elif whence == os.SEEK_END:
-            self.position = max(min(self.size + pos, self.size), 0)
-        else:
-            raise ValueError("Invalid argument")
-
-        self.buffer = b""
-        self.fileobj.seek(self.position)
-
-    def close(self):
-        """Close the file object.
-        """
-        self.closed = True
-
-    def __iter__(self):
-        """Get an iterator over the file's lines.
-        """
-        while True:
-            line = self.readline()
-            if not line:
-                break
-            yield line
-#class ExFileObject
-
-#------------------
-# Exported Classes
-#------------------
-class TarInfo(object):
-    """Informational class which holds the details about an
-       archive member given by a tar header block.
-       TarInfo objects are returned by TarFile.getmember(),
-       TarFile.getmembers() and TarFile.gettarinfo() and are
-       usually created internally.
-    """
-
-    __slots__ = ("name", "mode", "uid", "gid", "size", "mtime",
-                 "chksum", "type", "linkname", "uname", "gname",
-                 "devmajor", "devminor",
-                 "offset", "offset_data", "pax_headers", "sparse",
-                 "tarfile", "_sparse_structs", "_link_target")
-
-    def __init__(self, name=""):
-        """Construct a TarInfo object. name is the optional name
-           of the member.
-        """
-        self.name = name        # member name
-        self.mode = 0o644       # file permissions
-        self.uid = 0            # user id
-        self.gid = 0            # group id
-        self.size = 0           # file size
-        self.mtime = 0          # modification time
-        self.chksum = 0         # header checksum
-        self.type = REGTYPE     # member type
-        self.linkname = ""      # link name
-        self.uname = ""         # user name
-        self.gname = ""         # group name
-        self.devmajor = 0       # device major number
-        self.devminor = 0       # device minor number
-
-        self.offset = 0         # the tar header starts here
-        self.offset_data = 0    # the file's data starts here
-
-        self.sparse = None      # sparse member information
-        self.pax_headers = {}   # pax header information
-
-    # In pax headers the "name" and "linkname" field are called
-    # "path" and "linkpath".
-    def _getpath(self):
-        return self.name
-    def _setpath(self, name):
-        self.name = name
-    path = property(_getpath, _setpath)
-
-    def _getlinkpath(self):
-        return self.linkname
-    def _setlinkpath(self, linkname):
-        self.linkname = linkname
-    linkpath = property(_getlinkpath, _setlinkpath)
-
-    def __repr__(self):
-        return "<%s %r at %#x>" % (self.__class__.__name__,self.name,id(self))
-
-    def get_info(self):
-        """Return the TarInfo's attributes as a dictionary.
-        """
-        info = {
-            "name":     self.name,
-            "mode":     self.mode & 0o7777,
-            "uid":      self.uid,
-            "gid":      self.gid,
-            "size":     self.size,
-            "mtime":    self.mtime,
-            "chksum":   self.chksum,
-            "type":     self.type,
-            "linkname": self.linkname,
-            "uname":    self.uname,
-            "gname":    self.gname,
-            "devmajor": self.devmajor,
-            "devminor": self.devminor
-        }
-
-        if info["type"] == DIRTYPE and not info["name"].endswith("/"):
-            info["name"] += "/"
-
-        return info
-
-    def tobuf(self, format=DEFAULT_FORMAT, encoding=ENCODING, errors="surrogateescape"):
-        """Return a tar header as a string of 512 byte blocks.
-        """
-        info = self.get_info()
-
-        if format == USTAR_FORMAT:
-            return self.create_ustar_header(info, encoding, errors)
-        elif format == GNU_FORMAT:
-            return self.create_gnu_header(info, encoding, errors)
-        elif format == PAX_FORMAT:
-            return self.create_pax_header(info, encoding)
-        else:
-            raise ValueError("invalid format")
-
-    def create_ustar_header(self, info, encoding, errors):
-        """Return the object as a ustar header block.
-        """
-        info["magic"] = POSIX_MAGIC
-
-        if len(info["linkname"]) > LENGTH_LINK:
-            raise ValueError("linkname is too long")
-
-        if len(info["name"]) > LENGTH_NAME:
-            info["prefix"], info["name"] = self._posix_split_name(info["name"])
-
-        return self._create_header(info, USTAR_FORMAT, encoding, errors)
-
-    def create_gnu_header(self, info, encoding, errors):
-        """Return the object as a GNU header block sequence.
-        """
-        info["magic"] = GNU_MAGIC
-
-        buf = b""
-        if len(info["linkname"]) > LENGTH_LINK:
-            buf += self._create_gnu_long_header(info["linkname"], GNUTYPE_LONGLINK, encoding, errors)
-
-        if len(info["name"]) > LENGTH_NAME:
-            buf += self._create_gnu_long_header(info["name"], GNUTYPE_LONGNAME, encoding, errors)
-
-        return buf + self._create_header(info, GNU_FORMAT, encoding, errors)
-
-    def create_pax_header(self, info, encoding):
-        """Return the object as a ustar header block. If it cannot be
-           represented this way, prepend a pax extended header sequence
-           with supplement information.
-        """
-        info["magic"] = POSIX_MAGIC
-        pax_headers = self.pax_headers.copy()
-
-        # Test string fields for values that exceed the field length or cannot
-        # be represented in ASCII encoding.
-        for name, hname, length in (
-                ("name", "path", LENGTH_NAME), ("linkname", "linkpath", LENGTH_LINK),
-                ("uname", "uname", 32), ("gname", "gname", 32)):
-
-            if hname in pax_headers:
-                # The pax header has priority.
-                continue
-
-            # Try to encode the string as ASCII.
-            try:
-                info[name].encode("ascii", "strict")
-            except UnicodeEncodeError:
-                pax_headers[hname] = info[name]
-                continue
-
-            if len(info[name]) > length:
-                pax_headers[hname] = info[name]
-
-        # Test number fields for values that exceed the field limit or values
-        # that like to be stored as float.
-        for name, digits in (("uid", 8), ("gid", 8), ("size", 12), ("mtime", 12)):
-            if name in pax_headers:
-                # The pax header has priority. Avoid overflow.
-                info[name] = 0
-                continue
-
-            val = info[name]
-            if not 0 <= val < 8 ** (digits - 1) or isinstance(val, float):
-                pax_headers[name] = str(val)
-                info[name] = 0
-
-        # Create a pax extended header if necessary.
-        if pax_headers:
-            buf = self._create_pax_generic_header(pax_headers, XHDTYPE, encoding)
-        else:
-            buf = b""
-
-        return buf + self._create_header(info, USTAR_FORMAT, "ascii", "replace")
-
-    @classmethod
-    def create_pax_global_header(cls, pax_headers):
-        """Return the object as a pax global header block sequence.
-        """
-        return cls._create_pax_generic_header(pax_headers, XGLTYPE, "utf8")
-
-    def _posix_split_name(self, name):
-        """Split a name longer than 100 chars into a prefix
-           and a name part.
-        """
-        prefix = name[:LENGTH_PREFIX + 1]
-        while prefix and prefix[-1] != "/":
-            prefix = prefix[:-1]
-
-        name = name[len(prefix):]
-        prefix = prefix[:-1]
-
-        if not prefix or len(name) > LENGTH_NAME:
-            raise ValueError("name is too long")
-        return prefix, name
-
-    @staticmethod
-    def _create_header(info, format, encoding, errors):
-        """Return a header block. info is a dictionary with file
-           information, format must be one of the *_FORMAT constants.
-        """
-        parts = [
-            stn(info.get("name", ""), 100, encoding, errors),
-            itn(info.get("mode", 0) & 0o7777, 8, format),
-            itn(info.get("uid", 0), 8, format),
-            itn(info.get("gid", 0), 8, format),
-            itn(info.get("size", 0), 12, format),
-            itn(info.get("mtime", 0), 12, format),
-            b"        ", # checksum field
-            info.get("type", REGTYPE),
-            stn(info.get("linkname", ""), 100, encoding, errors),
-            info.get("magic", POSIX_MAGIC),
-            stn(info.get("uname", ""), 32, encoding, errors),
-            stn(info.get("gname", ""), 32, encoding, errors),
-            itn(info.get("devmajor", 0), 8, format),
-            itn(info.get("devminor", 0), 8, format),
-            stn(info.get("prefix", ""), 155, encoding, errors)
-        ]
-
-        buf = struct.pack("%ds" % BLOCKSIZE, b"".join(parts))
-        chksum = calc_chksums(buf[-BLOCKSIZE:])[0]
-        buf = buf[:-364] + ("%06o\0" % chksum).encode("ascii") + buf[-357:]
-        return buf
-
-    @staticmethod
-    def _create_payload(payload):
-        """Return the string payload filled with zero bytes
-           up to the next 512 byte border.
-        """
-        blocks, remainder = divmod(len(payload), BLOCKSIZE)
-        if remainder > 0:
-            payload += (BLOCKSIZE - remainder) * NUL
-        return payload
-
-    @classmethod
-    def _create_gnu_long_header(cls, name, type, encoding, errors):
-        """Return a GNUTYPE_LONGNAME or GNUTYPE_LONGLINK sequence
-           for name.
-        """
-        name = name.encode(encoding, errors) + NUL
-
-        info = {}
-        info["name"] = "././@LongLink"
-        info["type"] = type
-        info["size"] = len(name)
-        info["magic"] = GNU_MAGIC
-
-        # create extended header + name blocks.
-        return cls._create_header(info, USTAR_FORMAT, encoding, errors) + \
-                cls._create_payload(name)
-
-    @classmethod
-    def _create_pax_generic_header(cls, pax_headers, type, encoding):
-        """Return a POSIX.1-2008 extended or global header sequence
-           that contains a list of keyword, value pairs. The values
-           must be strings.
-        """
-        # Check if one of the fields contains surrogate characters and thereby
-        # forces hdrcharset=BINARY, see _proc_pax() for more information.
-        binary = False
-        for keyword, value in pax_headers.items():
-            try:
-                value.encode("utf8", "strict")
-            except UnicodeEncodeError:
-                binary = True
-                break
-
-        records = b""
-        if binary:
-            # Put the hdrcharset field at the beginning of the header.
-            records += b"21 hdrcharset=BINARY\n"
-
-        for keyword, value in pax_headers.items():
-            keyword = keyword.encode("utf8")
-            if binary:
-                # Try to restore the original byte representation of `value'.
-                # Needless to say, that the encoding must match the string.
-                value = value.encode(encoding, "surrogateescape")
-            else:
-                value = value.encode("utf8")
-
-            l = len(keyword) + len(value) + 3   # ' ' + '=' + '\n'
-            n = p = 0
-            while True:
-                n = l + len(str(p))
-                if n == p:
-                    break
-                p = n
-            records += bytes(str(p), "ascii") + b" " + keyword + b"=" + value + b"\n"
-
-        # We use a hardcoded "././@PaxHeader" name like star does
-        # instead of the one that POSIX recommends.
-        info = {}
-        info["name"] = "././@PaxHeader"
-        info["type"] = type
-        info["size"] = len(records)
-        info["magic"] = POSIX_MAGIC
-
-        # Create pax header + record blocks.
-        return cls._create_header(info, USTAR_FORMAT, "ascii", "replace") + \
-                cls._create_payload(records)
-
-    @classmethod
-    def frombuf(cls, buf, encoding, errors):
-        """Construct a TarInfo object from a 512 byte bytes object.
-        """
-        if len(buf) == 0:
-            raise EmptyHeaderError("empty header")
-        if len(buf) != BLOCKSIZE:
-            raise TruncatedHeaderError("truncated header")
-        if buf.count(NUL) == BLOCKSIZE:
-            raise EOFHeaderError("end of file header")
-
-        chksum = nti(buf[148:156])
-        if chksum not in calc_chksums(buf):
-            raise InvalidHeaderError("bad checksum")
-
-        obj = cls()
-        obj.name = nts(buf[0:100], encoding, errors)
-        obj.mode = nti(buf[100:108])
-        obj.uid = nti(buf[108:116])
-        obj.gid = nti(buf[116:124])
-        obj.size = nti(buf[124:136])
-        obj.mtime = nti(buf[136:148])
-        obj.chksum = chksum
-        obj.type = buf[156:157]
-        obj.linkname = nts(buf[157:257], encoding, errors)
-        obj.uname = nts(buf[265:297], encoding, errors)
-        obj.gname = nts(buf[297:329], encoding, errors)
-        obj.devmajor = nti(buf[329:337])
-        obj.devminor = nti(buf[337:345])
-        prefix = nts(buf[345:500], encoding, errors)
-
-        # Old V7 tar format represents a directory as a regular
-        # file with a trailing slash.
-        if obj.type == AREGTYPE and obj.name.endswith("/"):
-            obj.type = DIRTYPE
-
-        # The old GNU sparse format occupies some of the unused
-        # space in the buffer for up to 4 sparse structures.
-        # Save the them for later processing in _proc_sparse().
-        if obj.type == GNUTYPE_SPARSE:
-            pos = 386
-            structs = []
-            for i in range(4):
-                try:
-                    offset = nti(buf[pos:pos + 12])
-                    numbytes = nti(buf[pos + 12:pos + 24])
-                except ValueError:
-                    break
-                structs.append((offset, numbytes))
-                pos += 24
-            isextended = bool(buf[482])
-            origsize = nti(buf[483:495])
-            obj._sparse_structs = (structs, isextended, origsize)
-
-        # Remove redundant slashes from directories.
-        if obj.isdir():
-            obj.name = obj.name.rstrip("/")
-
-        # Reconstruct a ustar longname.
-        if prefix and obj.type not in GNU_TYPES:
-            obj.name = prefix + "/" + obj.name
-        return obj
-
-    @classmethod
-    def fromtarfile(cls, tarfile):
-        """Return the next TarInfo object from TarFile object
-           tarfile.
-        """
-        buf = tarfile.fileobj.read(BLOCKSIZE)
-        obj = cls.frombuf(buf, tarfile.encoding, tarfile.errors)
-        obj.offset = tarfile.fileobj.tell() - BLOCKSIZE
-        return obj._proc_member(tarfile)
-
-    #--------------------------------------------------------------------------
-    # The following are methods that are called depending on the type of a
-    # member. The entry point is _proc_member() which can be overridden in a
-    # subclass to add custom _proc_*() methods. A _proc_*() method MUST
-    # implement the following
-    # operations:
-    # 1. Set self.offset_data to the position where the data blocks begin,
-    #    if there is data that follows.
-    # 2. Set tarfile.offset to the position where the next member's header will
-    #    begin.
-    # 3. Return self or another valid TarInfo object.
-    def _proc_member(self, tarfile):
-        """Choose the right processing method depending on
-           the type and call it.
-        """
-        if self.type in (GNUTYPE_LONGNAME, GNUTYPE_LONGLINK):
-            return self._proc_gnulong(tarfile)
-        elif self.type == GNUTYPE_SPARSE:
-            return self._proc_sparse(tarfile)
-        elif self.type in (XHDTYPE, XGLTYPE, SOLARIS_XHDTYPE):
-            return self._proc_pax(tarfile)
-        else:
-            return self._proc_builtin(tarfile)
-
-    def _proc_builtin(self, tarfile):
-        """Process a builtin type or an unknown type which
-           will be treated as a regular file.
-        """
-        self.offset_data = tarfile.fileobj.tell()
-        offset = self.offset_data
-        if self.isreg() or self.type not in SUPPORTED_TYPES:
-            # Skip the following data blocks.
-            offset += self._block(self.size)
-        tarfile.offset = offset
-
-        # Patch the TarInfo object with saved global
-        # header information.
-        self._apply_pax_info(tarfile.pax_headers, tarfile.encoding, tarfile.errors)
-
-        return self
-
-    def _proc_gnulong(self, tarfile):
-        """Process the blocks that hold a GNU longname
-           or longlink member.
-        """
-        buf = tarfile.fileobj.read(self._block(self.size))
-
-        # Fetch the next header and process it.
-        try:
-            next = self.fromtarfile(tarfile)
-        except HeaderError:
-            raise SubsequentHeaderError("missing or bad subsequent header")
-
-        # Patch the TarInfo object from the next header with
-        # the longname information.
-        next.offset = self.offset
-        if self.type == GNUTYPE_LONGNAME:
-            next.name = nts(buf, tarfile.encoding, tarfile.errors)
-        elif self.type == GNUTYPE_LONGLINK:
-            next.linkname = nts(buf, tarfile.encoding, tarfile.errors)
-
-        return next
-
-    def _proc_sparse(self, tarfile):
-        """Process a GNU sparse header plus extra headers.
-        """
-        # We already collected some sparse structures in frombuf().
-        structs, isextended, origsize = self._sparse_structs
-        del self._sparse_structs
-
-        # Collect sparse structures from extended header blocks.
-        while isextended:
-            buf = tarfile.fileobj.read(BLOCKSIZE)
-            pos = 0
-            for i in range(21):
-                try:
-                    offset = nti(buf[pos:pos + 12])
-                    numbytes = nti(buf[pos + 12:pos + 24])
-                except ValueError:
-                    break
-                if offset and numbytes:
-                    structs.append((offset, numbytes))
-                pos += 24
-            isextended = bool(buf[504])
-        self.sparse = structs
-
-        self.offset_data = tarfile.fileobj.tell()
-        tarfile.offset = self.offset_data + self._block(self.size)
-        self.size = origsize
-        return self
-
-    def _proc_pax(self, tarfile):
-        """Process an extended or global header as described in
-           POSIX.1-2008.
-        """
-        # Read the header information.
-        buf = tarfile.fileobj.read(self._block(self.size))
-
-        # A pax header stores supplemental information for either
-        # the following file (extended) or all following files
-        # (global).
-        if self.type == XGLTYPE:
-            pax_headers = tarfile.pax_headers
-        else:
-            pax_headers = tarfile.pax_headers.copy()
-
-        # Check if the pax header contains a hdrcharset field. This tells us
-        # the encoding of the path, linkpath, uname and gname fields. Normally,
-        # these fields are UTF-8 encoded but since POSIX.1-2008 tar
-        # implementations are allowed to store them as raw binary strings if
-        # the translation to UTF-8 fails.
-        match = re.search(br"\d+ hdrcharset=([^\n]+)\n", buf)
-        if match is not None:
-            pax_headers["hdrcharset"] = match.group(1).decode("utf8")
-
-        # For the time being, we don't care about anything other than "BINARY".
-        # The only other value that is currently allowed by the standard is
-        # "ISO-IR 10646 2000 UTF-8" in other words UTF-8.
-        hdrcharset = pax_headers.get("hdrcharset")
-        if hdrcharset == "BINARY":
-            encoding = tarfile.encoding
-        else:
-            encoding = "utf8"
-
-        # Parse pax header information. A record looks like that:
-        # "%d %s=%s\n" % (length, keyword, value). length is the size
-        # of the complete record including the length field itself and
-        # the newline. keyword and value are both UTF-8 encoded strings.
-        regex = re.compile(br"(\d+) ([^=]+)=")
-        pos = 0
-        while True:
-            match = regex.match(buf, pos)
-            if not match:
-                break
-
-            length, keyword = match.groups()
-            length = int(length)
-            value = buf[match.end(2) + 1:match.start(1) + length - 1]
-
-            # Normally, we could just use "utf8" as the encoding and "strict"
-            # as the error handler, but we better not take the risk. For
-            # example, GNU tar <= 1.23 is known to store filenames it cannot
-            # translate to UTF-8 as raw strings (unfortunately without a
-            # hdrcharset=BINARY header).
-            # We first try the strict standard encoding, and if that fails we
-            # fall back on the user's encoding and error handler.
-            keyword = self._decode_pax_field(keyword, "utf8", "utf8",
-                    tarfile.errors)
-            if keyword in PAX_NAME_FIELDS:
-                value = self._decode_pax_field(value, encoding, tarfile.encoding,
-                        tarfile.errors)
-            else:
-                value = self._decode_pax_field(value, "utf8", "utf8",
-                        tarfile.errors)
-
-            pax_headers[keyword] = value
-            pos += length
-
-        # Fetch the next header.
-        try:
-            next = self.fromtarfile(tarfile)
-        except HeaderError:
-            raise SubsequentHeaderError("missing or bad subsequent header")
-
-        # Process GNU sparse information.
-        if "GNU.sparse.map" in pax_headers:
-            # GNU extended sparse format version 0.1.
-            self._proc_gnusparse_01(next, pax_headers)
-
-        elif "GNU.sparse.size" in pax_headers:
-            # GNU extended sparse format version 0.0.
-            self._proc_gnusparse_00(next, pax_headers, buf)
-
-        elif pax_headers.get("GNU.sparse.major") == "1" and pax_headers.get("GNU.sparse.minor") == "0":
-            # GNU extended sparse format version 1.0.
-            self._proc_gnusparse_10(next, pax_headers, tarfile)
-
-        if self.type in (XHDTYPE, SOLARIS_XHDTYPE):
-            # Patch the TarInfo object with the extended header info.
-            next._apply_pax_info(pax_headers, tarfile.encoding, tarfile.errors)
-            next.offset = self.offset
-
-            if "size" in pax_headers:
-                # If the extended header replaces the size field,
-                # we need to recalculate the offset where the next
-                # header starts.
-                offset = next.offset_data
-                if next.isreg() or next.type not in SUPPORTED_TYPES:
-                    offset += next._block(next.size)
-                tarfile.offset = offset
-
-        return next
-
-    def _proc_gnusparse_00(self, next, pax_headers, buf):
-        """Process a GNU tar extended sparse header, version 0.0.
-        """
-        offsets = []
-        for match in re.finditer(br"\d+ GNU.sparse.offset=(\d+)\n", buf):
-            offsets.append(int(match.group(1)))
-        numbytes = []
-        for match in re.finditer(br"\d+ GNU.sparse.numbytes=(\d+)\n", buf):
-            numbytes.append(int(match.group(1)))
-        next.sparse = list(zip(offsets, numbytes))
-
-    def _proc_gnusparse_01(self, next, pax_headers):
-        """Process a GNU tar extended sparse header, version 0.1.
-        """
-        sparse = [int(x) for x in pax_headers["GNU.sparse.map"].split(",")]
-        next.sparse = list(zip(sparse[::2], sparse[1::2]))
-
-    def _proc_gnusparse_10(self, next, pax_headers, tarfile):
-        """Process a GNU tar extended sparse header, version 1.0.
-        """
-        fields = None
-        sparse = []
-        buf = tarfile.fileobj.read(BLOCKSIZE)
-        fields, buf = buf.split(b"\n", 1)
-        fields = int(fields)
-        while len(sparse) < fields * 2:
-            if b"\n" not in buf:
-                buf += tarfile.fileobj.read(BLOCKSIZE)
-            number, buf = buf.split(b"\n", 1)
-            sparse.append(int(number))
-        next.offset_data = tarfile.fileobj.tell()
-        next.sparse = list(zip(sparse[::2], sparse[1::2]))
-
-    def _apply_pax_info(self, pax_headers, encoding, errors):
-        """Replace fields with supplemental information from a previous
-           pax extended or global header.
-        """
-        for keyword, value in pax_headers.items():
-            if keyword == "GNU.sparse.name":
-                setattr(self, "path", value)
-            elif keyword == "GNU.sparse.size":
-                setattr(self, "size", int(value))
-            elif keyword == "GNU.sparse.realsize":
-                setattr(self, "size", int(value))
-            elif keyword in PAX_FIELDS:
-                if keyword in PAX_NUMBER_FIELDS:
-                    try:
-                        value = PAX_NUMBER_FIELDS[keyword](value)
-                    except ValueError:
-                        value = 0
-                if keyword == "path":
-                    value = value.rstrip("/")
-                setattr(self, keyword, value)
-
-        self.pax_headers = pax_headers.copy()
-
-    def _decode_pax_field(self, value, encoding, fallback_encoding, fallback_errors):
-        """Decode a single field from a pax record.
-        """
-        try:
-            return value.decode(encoding, "strict")
-        except UnicodeDecodeError:
-            return value.decode(fallback_encoding, fallback_errors)
-
-    def _block(self, count):
-        """Round up a byte count by BLOCKSIZE and return it,
-           e.g. _block(834) => 1024.
-        """
-        blocks, remainder = divmod(count, BLOCKSIZE)
-        if remainder:
-            blocks += 1
-        return blocks * BLOCKSIZE
-
-    def isreg(self):
-        return self.type in REGULAR_TYPES
-    def isfile(self):
-        return self.isreg()
-    def isdir(self):
-        return self.type == DIRTYPE
-    def issym(self):
-        return self.type == SYMTYPE
-    def islnk(self):
-        return self.type == LNKTYPE
-    def ischr(self):
-        return self.type == CHRTYPE
-    def isblk(self):
-        return self.type == BLKTYPE
-    def isfifo(self):
-        return self.type == FIFOTYPE
-    def issparse(self):
-        return self.sparse is not None
-    def isdev(self):
-        return self.type in (CHRTYPE, BLKTYPE, FIFOTYPE)
-# class TarInfo
-
-class TarFile(object):
-    """The TarFile Class provides an interface to tar archives.
-    """
-
-    debug = 0                   # May be set from 0 (no msgs) to 3 (all msgs)
-
-    dereference = False         # If true, add content of linked file to the
-                                # tar file, else the link.
-
-    ignore_zeros = False        # If true, skips empty or invalid blocks and
-                                # continues processing.
-
-    errorlevel = 1              # If 0, fatal errors only appear in debug
-                                # messages (if debug >= 0). If > 0, errors
-                                # are passed to the caller as exceptions.
-
-    format = DEFAULT_FORMAT     # The format to use when creating an archive.
-
-    encoding = ENCODING         # Encoding for 8-bit character strings.
-
-    errors = None               # Error handler for unicode conversion.
-
-    tarinfo = TarInfo           # The default TarInfo class to use.
-
-    fileobject = ExFileObject   # The default ExFileObject class to use.
-
-    def __init__(self, name=None, mode="r", fileobj=None, format=None,
-            tarinfo=None, dereference=None, ignore_zeros=None, encoding=None,
-            errors="surrogateescape", pax_headers=None, debug=None, errorlevel=None):
-        """Open an (uncompressed) tar archive `name'. `mode' is either 'r' to
-           read from an existing archive, 'a' to append data to an existing
-           file or 'w' to create a new file overwriting an existing one. `mode'
-           defaults to 'r'.
-           If `fileobj' is given, it is used for reading or writing data. If it
-           can be determined, `mode' is overridden by `fileobj's mode.
-           `fileobj' is not closed, when TarFile is closed.
-        """
-        if len(mode) > 1 or mode not in "raw":
-            raise ValueError("mode must be 'r', 'a' or 'w'")
-        self.mode = mode
-        self._mode = {"r": "rb", "a": "r+b", "w": "wb"}[mode]
-
-        if not fileobj:
-            if self.mode == "a" and not os.path.exists(name):
-                # Create nonexistent files in append mode.
-                self.mode = "w"
-                self._mode = "wb"
-            fileobj = bltn_open(name, self._mode)
-            self._extfileobj = False
-        else:
-            if name is None and hasattr(fileobj, "name"):
-                name = fileobj.name
-            if hasattr(fileobj, "mode"):
-                self._mode = fileobj.mode
-            self._extfileobj = True
-        self.name = os.path.abspath(name) if name else None
-        self.fileobj = fileobj
-
-        # Init attributes.
-        if format is not None:
-            self.format = format
-        if tarinfo is not None:
-            self.tarinfo = tarinfo
-        if dereference is not None:
-            self.dereference = dereference
-        if ignore_zeros is not None:
-            self.ignore_zeros = ignore_zeros
-        if encoding is not None:
-            self.encoding = encoding
-        self.errors = errors
-
-        if pax_headers is not None and self.format == PAX_FORMAT:
-            self.pax_headers = pax_headers
-        else:
-            self.pax_headers = {}
-
-        if debug is not None:
-            self.debug = debug
-        if errorlevel is not None:
-            self.errorlevel = errorlevel
-
-        # Init datastructures.
-        self.closed = False
-        self.members = []       # list of members as TarInfo objects
-        self._loaded = False    # flag if all members have been read
-        self.offset = self.fileobj.tell()
-                                # current position in the archive file
-        self.inodes = {}        # dictionary caching the inodes of
-                                # archive members already added
-
-        try:
-            if self.mode == "r":
-                self.firstmember = None
-                self.firstmember = self.next()
-
-            if self.mode == "a":
-                # Move to the end of the archive,
-                # before the first empty block.
-                while True:
-                    self.fileobj.seek(self.offset)
-                    try:
-                        tarinfo = self.tarinfo.fromtarfile(self)
-                        self.members.append(tarinfo)
-                    except EOFHeaderError:
-                        self.fileobj.seek(self.offset)
-                        break
-                    except HeaderError as e:
-                        raise ReadError(str(e))
-
-            if self.mode in "aw":
-                self._loaded = True
-
-                if self.pax_headers:
-                    buf = self.tarinfo.create_pax_global_header(self.pax_headers.copy())
-                    self.fileobj.write(buf)
-                    self.offset += len(buf)
-        except:
-            if not self._extfileobj:
-                self.fileobj.close()
-            self.closed = True
-            raise
-
-    #--------------------------------------------------------------------------
-    # Below are the classmethods which act as alternate constructors to the
-    # TarFile class. The open() method is the only one that is needed for
-    # public use; it is the "super"-constructor and is able to select an
-    # adequate "sub"-constructor for a particular compression using the mapping
-    # from OPEN_METH.
-    #
-    # This concept allows one to subclass TarFile without losing the comfort of
-    # the super-constructor. A sub-constructor is registered and made available
-    # by adding it to the mapping in OPEN_METH.
-
-    @classmethod
-    def open(cls, name=None, mode="r", fileobj=None, bufsize=RECORDSIZE, **kwargs):
-        """Open a tar archive for reading, writing or appending. Return
-           an appropriate TarFile class.
-
-           mode:
-           'r' or 'r:*' open for reading with transparent compression
-           'r:'         open for reading exclusively uncompressed
-           'r:gz'       open for reading with gzip compression
-           'r:bz2'      open for reading with bzip2 compression
-           'a' or 'a:'  open for appending, creating the file if necessary
-           'w' or 'w:'  open for writing without compression
-           'w:gz'       open for writing with gzip compression
-           'w:bz2'      open for writing with bzip2 compression
-
-           'r|*'        open a stream of tar blocks with transparent compression
-           'r|'         open an uncompressed stream of tar blocks for reading
-           'r|gz'       open a gzip compressed stream of tar blocks
-           'r|bz2'      open a bzip2 compressed stream of tar blocks
-           'w|'         open an uncompressed stream for writing
-           'w|gz'       open a gzip compressed stream for writing
-           'w|bz2'      open a bzip2 compressed stream for writing
-        """
-
-        if not name and not fileobj:
-            raise ValueError("nothing to open")
-
-        if mode in ("r", "r:*"):
-            # Find out which *open() is appropriate for opening the file.
-            for comptype in cls.OPEN_METH:
-                func = getattr(cls, cls.OPEN_METH[comptype])
-                if fileobj is not None:
-                    saved_pos = fileobj.tell()
-                try:
-                    return func(name, "r", fileobj, **kwargs)
-                except (ReadError, CompressionError) as e:
-                    if fileobj is not None:
-                        fileobj.seek(saved_pos)
-                    continue
-            raise ReadError("file could not be opened successfully")
-
-        elif ":" in mode:
-            filemode, comptype = mode.split(":", 1)
-            filemode = filemode or "r"
-            comptype = comptype or "tar"
-
-            # Select the *open() function according to
-            # given compression.
-            if comptype in cls.OPEN_METH:
-                func = getattr(cls, cls.OPEN_METH[comptype])
-            else:
-                raise CompressionError("unknown compression type %r" % comptype)
-            return func(name, filemode, fileobj, **kwargs)
-
-        elif "|" in mode:
-            filemode, comptype = mode.split("|", 1)
-            filemode = filemode or "r"
-            comptype = comptype or "tar"
-
-            if filemode not in "rw":
-                raise ValueError("mode must be 'r' or 'w'")
-
-            stream = _Stream(name, filemode, comptype, fileobj, bufsize)
-            try:
-                t = cls(name, filemode, stream, **kwargs)
-            except:
-                stream.close()
-                raise
-            t._extfileobj = False
-            return t
-
-        elif mode in "aw":
-            return cls.taropen(name, mode, fileobj, **kwargs)
-
-        raise ValueError("undiscernible mode")
-
-    @classmethod
-    def taropen(cls, name, mode="r", fileobj=None, **kwargs):
-        """Open uncompressed tar archive name for reading or writing.
-        """
-        if len(mode) > 1 or mode not in "raw":
-            raise ValueError("mode must be 'r', 'a' or 'w'")
-        return cls(name, mode, fileobj, **kwargs)
-
-    @classmethod
-    def gzopen(cls, name, mode="r", fileobj=None, compresslevel=9, **kwargs):
-        """Open gzip compressed tar archive name for reading or writing.
-           Appending is not allowed.
-        """
-        if len(mode) > 1 or mode not in "rw":
-            raise ValueError("mode must be 'r' or 'w'")
-
-        try:
-            import gzip
-            gzip.GzipFile
-        except (ImportError, AttributeError):
-            raise CompressionError("gzip module is not available")
-
-        extfileobj = fileobj is not None
-        try:
-            fileobj = gzip.GzipFile(name, mode + "b", compresslevel, fileobj)
-            t = cls.taropen(name, mode, fileobj, **kwargs)
-        except IOError:
-            if not extfileobj and fileobj is not None:
-                fileobj.close()
-            if fileobj is None:
-                raise
-            raise ReadError("not a gzip file")
-        except:
-            if not extfileobj and fileobj is not None:
-                fileobj.close()
-            raise
-        t._extfileobj = extfileobj
-        return t
-
-    @classmethod
-    def bz2open(cls, name, mode="r", fileobj=None, compresslevel=9, **kwargs):
-        """Open bzip2 compressed tar archive name for reading or writing.
-           Appending is not allowed.
-        """
-        if len(mode) > 1 or mode not in "rw":
-            raise ValueError("mode must be 'r' or 'w'.")
-
-        try:
-            import bz2
-        except ImportError:
-            raise CompressionError("bz2 module is not available")
-
-        if fileobj is not None:
-            fileobj = _BZ2Proxy(fileobj, mode)
-        else:
-            fileobj = bz2.BZ2File(name, mode, compresslevel=compresslevel)
-
-        try:
-            t = cls.taropen(name, mode, fileobj, **kwargs)
-        except (IOError, EOFError):
-            fileobj.close()
-            raise ReadError("not a bzip2 file")
-        t._extfileobj = False
-        return t
-
-    # All *open() methods are registered here.
-    OPEN_METH = {
-        "tar": "taropen",   # uncompressed tar
-        "gz":  "gzopen",    # gzip compressed tar
-        "bz2": "bz2open"    # bzip2 compressed tar
-    }
-
-    #--------------------------------------------------------------------------
-    # The public methods which TarFile provides:
-
-    def close(self):
-        """Close the TarFile. In write-mode, two finishing zero blocks are
-           appended to the archive.
-        """
-        if self.closed:
-            return
-
-        if self.mode in "aw":
-            self.fileobj.write(NUL * (BLOCKSIZE * 2))
-            self.offset += (BLOCKSIZE * 2)
-            # fill up the end with zero-blocks
-            # (like option -b20 for tar does)
-            blocks, remainder = divmod(self.offset, RECORDSIZE)
-            if remainder > 0:
-                self.fileobj.write(NUL * (RECORDSIZE - remainder))
-
-        if not self._extfileobj:
-            self.fileobj.close()
-        self.closed = True
-
-    def getmember(self, name):
-        """Return a TarInfo object for member `name'. If `name' can not be
-           found in the archive, KeyError is raised. If a member occurs more
-           than once in the archive, its last occurrence is assumed to be the
-           most up-to-date version.
-        """
-        tarinfo = self._getmember(name)
-        if tarinfo is None:
-            raise KeyError("filename %r not found" % name)
-        return tarinfo
-
-    def getmembers(self):
-        """Return the members of the archive as a list of TarInfo objects. The
-           list has the same order as the members in the archive.
-        """
-        self._check()
-        if not self._loaded:    # if we want to obtain a list of
-            self._load()        # all members, we first have to
-                                # scan the whole archive.
-        return self.members
-
-    def getnames(self):
-        """Return the members of the archive as a list of their names. It has
-           the same order as the list returned by getmembers().
-        """
-        return [tarinfo.name for tarinfo in self.getmembers()]
-
-    def gettarinfo(self, name=None, arcname=None, fileobj=None):
-        """Create a TarInfo object for either the file `name' or the file
-           object `fileobj' (using os.fstat on its file descriptor). You can
-           modify some of the TarInfo's attributes before you add it using
-           addfile(). If given, `arcname' specifies an alternative name for the
-           file in the archive.
-        """
-        self._check("aw")
-
-        # When fileobj is given, replace name by
-        # fileobj's real name.
-        if fileobj is not None:
-            name = fileobj.name
-
-        # Building the name of the member in the archive.
-        # Backward slashes are converted to forward slashes,
-        # Absolute paths are turned to relative paths.
-        if arcname is None:
-            arcname = name
-        drv, arcname = os.path.splitdrive(arcname)
-        arcname = arcname.replace(os.sep, "/")
-        arcname = arcname.lstrip("/")
-
-        # Now, fill the TarInfo object with
-        # information specific for the file.
-        tarinfo = self.tarinfo()
-        tarinfo.tarfile = self
-
-        # Use os.stat or os.lstat, depending on platform
-        # and if symlinks shall be resolved.
-        if fileobj is None:
-            if hasattr(os, "lstat") and not self.dereference:
-                statres = os.lstat(name)
-            else:
-                statres = os.stat(name)
-        else:
-            statres = os.fstat(fileobj.fileno())
-        linkname = ""
-
-        stmd = statres.st_mode
-        if stat.S_ISREG(stmd):
-            inode = (statres.st_ino, statres.st_dev)
-            if not self.dereference and statres.st_nlink > 1 and \
-                    inode in self.inodes and arcname != self.inodes[inode]:
-                # Is it a hardlink to an already
-                # archived file?
-                type = LNKTYPE
-                linkname = self.inodes[inode]
-            else:
-                # The inode is added only if its valid.
-                # For win32 it is always 0.
-                type = REGTYPE
-                if inode[0]:
-                    self.inodes[inode] = arcname
-        elif stat.S_ISDIR(stmd):
-            type = DIRTYPE
-        elif stat.S_ISFIFO(stmd):
-            type = FIFOTYPE
-        elif stat.S_ISLNK(stmd):
-            type = SYMTYPE
-            linkname = os.readlink(name)
-        elif stat.S_ISCHR(stmd):
-            type = CHRTYPE
-        elif stat.S_ISBLK(stmd):
-            type = BLKTYPE
-        else:
-            return None
-
-        # Fill the TarInfo object with all
-        # information we can get.
-        tarinfo.name = arcname
-        tarinfo.mode = stmd
-        tarinfo.uid = statres.st_uid
-        tarinfo.gid = statres.st_gid
-        if type == REGTYPE:
-            tarinfo.size = statres.st_size
-        else:
-            tarinfo.size = 0
-        tarinfo.mtime = statres.st_mtime
-        tarinfo.type = type
-        tarinfo.linkname = linkname
-        if pwd:
-            try:
-                tarinfo.uname = pwd.getpwuid(tarinfo.uid)[0]
-            except KeyError:
-                pass
-        if grp:
-            try:
-                tarinfo.gname = grp.getgrgid(tarinfo.gid)[0]
-            except KeyError:
-                pass
-
-        if type in (CHRTYPE, BLKTYPE):
-            if hasattr(os, "major") and hasattr(os, "minor"):
-                tarinfo.devmajor = os.major(statres.st_rdev)
-                tarinfo.devminor = os.minor(statres.st_rdev)
-        return tarinfo
-
-    def list(self, verbose=True):
-        """Print a table of contents to sys.stdout. If `verbose' is False, only
-           the names of the members are printed. If it is True, an `ls -l'-like
-           output is produced.
-        """
-        self._check()
-
-        for tarinfo in self:
-            if verbose:
-                print(filemode(tarinfo.mode), end=' ')
-                print("%s/%s" % (tarinfo.uname or tarinfo.uid,
-                                 tarinfo.gname or tarinfo.gid), end=' ')
-                if tarinfo.ischr() or tarinfo.isblk():
-                    print("%10s" % ("%d,%d" \
-                                    % (tarinfo.devmajor, tarinfo.devminor)), end=' ')
-                else:
-                    print("%10d" % tarinfo.size, end=' ')
-                print("%d-%02d-%02d %02d:%02d:%02d" \
-                      % time.localtime(tarinfo.mtime)[:6], end=' ')
-
-            print(tarinfo.name + ("/" if tarinfo.isdir() else ""), end=' ')
-
-            if verbose:
-                if tarinfo.issym():
-                    print("->", tarinfo.linkname, end=' ')
-                if tarinfo.islnk():
-                    print("link to", tarinfo.linkname, end=' ')
-            print()
-
-    def add(self, name, arcname=None, recursive=True, exclude=None, filter=None):
-        """Add the file `name' to the archive. `name' may be any type of file
-           (directory, fifo, symbolic link, etc.). If given, `arcname'
-           specifies an alternative name for the file in the archive.
-           Directories are added recursively by default. This can be avoided by
-           setting `recursive' to False. `exclude' is a function that should
-           return True for each filename to be excluded. `filter' is a function
-           that expects a TarInfo object argument and returns the changed
-           TarInfo object, if it returns None the TarInfo object will be
-           excluded from the archive.
-        """
-        self._check("aw")
-
-        if arcname is None:
-            arcname = name
-
-        # Exclude pathnames.
-        if exclude is not None:
-            import warnings
-            warnings.warn("use the filter argument instead",
-                    DeprecationWarning, 2)
-            if exclude(name):
-                self._dbg(2, "tarfile: Excluded %r" % name)
-                return
-
-        # Skip if somebody tries to archive the archive...
-        if self.name is not None and os.path.abspath(name) == self.name:
-            self._dbg(2, "tarfile: Skipped %r" % name)
-            return
-
-        self._dbg(1, name)
-
-        # Create a TarInfo object from the file.
-        tarinfo = self.gettarinfo(name, arcname)
-
-        if tarinfo is None:
-            self._dbg(1, "tarfile: Unsupported type %r" % name)
-            return
-
-        # Change or exclude the TarInfo object.
-        if filter is not None:
-            tarinfo = filter(tarinfo)
-            if tarinfo is None:
-                self._dbg(2, "tarfile: Excluded %r" % name)
-                return
-
-        # Append the tar header and data to the archive.
-        if tarinfo.isreg():
-            f = bltn_open(name, "rb")
-            self.addfile(tarinfo, f)
-            f.close()
-
-        elif tarinfo.isdir():
-            self.addfile(tarinfo)
-            if recursive:
-                for f in os.listdir(name):
-                    self.add(os.path.join(name, f), os.path.join(arcname, f),
-                            recursive, exclude, filter=filter)
-
-        else:
-            self.addfile(tarinfo)
-
-    def addfile(self, tarinfo, fileobj=None):
-        """Add the TarInfo object `tarinfo' to the archive. If `fileobj' is
-           given, tarinfo.size bytes are read from it and added to the archive.
-           You can create TarInfo objects using gettarinfo().
-           On Windows platforms, `fileobj' should always be opened with mode
-           'rb' to avoid irritation about the file size.
-        """
-        self._check("aw")
-
-        tarinfo = copy.copy(tarinfo)
-
-        buf = tarinfo.tobuf(self.format, self.encoding, self.errors)
-        self.fileobj.write(buf)
-        self.offset += len(buf)
-
-        # If there's data to follow, append it.
-        if fileobj is not None:
-            copyfileobj(fileobj, self.fileobj, tarinfo.size)
-            blocks, remainder = divmod(tarinfo.size, BLOCKSIZE)
-            if remainder > 0:
-                self.fileobj.write(NUL * (BLOCKSIZE - remainder))
-                blocks += 1
-            self.offset += blocks * BLOCKSIZE
-
-        self.members.append(tarinfo)
-
-    def extractall(self, path=".", members=None):
-        """Extract all members from the archive to the current working
-           directory and set owner, modification time and permissions on
-           directories afterwards. `path' specifies a different directory
-           to extract to. `members' is optional and must be a subset of the
-           list returned by getmembers().
-        """
-        directories = []
-
-        if members is None:
-            members = self
-
-        for tarinfo in members:
-            if tarinfo.isdir():
-                # Extract directories with a safe mode.
-                directories.append(tarinfo)
-                tarinfo = copy.copy(tarinfo)
-                tarinfo.mode = 0o700
-            # Do not set_attrs directories, as we will do that further down
-            self.extract(tarinfo, path, set_attrs=not tarinfo.isdir())
-
-        # Reverse sort directories.
-        directories.sort(key=lambda a: a.name)
-        directories.reverse()
-
-        # Set correct owner, mtime and filemode on directories.
-        for tarinfo in directories:
-            dirpath = os.path.join(path, tarinfo.name)
-            try:
-                self.chown(tarinfo, dirpath)
-                self.utime(tarinfo, dirpath)
-                self.chmod(tarinfo, dirpath)
-            except ExtractError as e:
-                if self.errorlevel > 1:
-                    raise
-                else:
-                    self._dbg(1, "tarfile: %s" % e)
-
-    def extract(self, member, path="", set_attrs=True):
-        """Extract a member from the archive to the current working directory,
-           using its full name. Its file information is extracted as accurately
-           as possible. `member' may be a filename or a TarInfo object. You can
-           specify a different directory using `path'. File attributes (owner,
-           mtime, mode) are set unless `set_attrs' is False.
-        """
-        self._check("r")
-
-        if isinstance(member, str):
-            tarinfo = self.getmember(member)
-        else:
-            tarinfo = member
-
-        # Prepare the link target for makelink().
-        if tarinfo.islnk():
-            tarinfo._link_target = os.path.join(path, tarinfo.linkname)
-
-        try:
-            self._extract_member(tarinfo, os.path.join(path, tarinfo.name),
-                                 set_attrs=set_attrs)
-        except EnvironmentError as e:
-            if self.errorlevel > 0:
-                raise
-            else:
-                if e.filename is None:
-                    self._dbg(1, "tarfile: %s" % e.strerror)
-                else:
-                    self._dbg(1, "tarfile: %s %r" % (e.strerror, e.filename))
-        except ExtractError as e:
-            if self.errorlevel > 1:
-                raise
-            else:
-                self._dbg(1, "tarfile: %s" % e)
-
-    def extractfile(self, member):
-        """Extract a member from the archive as a file object. `member' may be
-           a filename or a TarInfo object. If `member' is a regular file, a
-           file-like object is returned. If `member' is a link, a file-like
-           object is constructed from the link's target. If `member' is none of
-           the above, None is returned.
-           The file-like object is read-only and provides the following
-           methods: read(), readline(), readlines(), seek() and tell()
-        """
-        self._check("r")
-
-        if isinstance(member, str):
-            tarinfo = self.getmember(member)
-        else:
-            tarinfo = member
-
-        if tarinfo.isreg():
-            return self.fileobject(self, tarinfo)
-
-        elif tarinfo.type not in SUPPORTED_TYPES:
-            # If a member's type is unknown, it is treated as a
-            # regular file.
-            return self.fileobject(self, tarinfo)
-
-        elif tarinfo.islnk() or tarinfo.issym():
-            if isinstance(self.fileobj, _Stream):
-                # A small but ugly workaround for the case that someone tries
-                # to extract a (sym)link as a file-object from a non-seekable
-                # stream of tar blocks.
-                raise StreamError("cannot extract (sym)link as file object")
-            else:
-                # A (sym)link's file object is its target's file object.
-                return self.extractfile(self._find_link_target(tarinfo))
-        else:
-            # If there's no data associated with the member (directory, chrdev,
-            # blkdev, etc.), return None instead of a file object.
-            return None
-
-    def _extract_member(self, tarinfo, targetpath, set_attrs=True):
-        """Extract the TarInfo object tarinfo to a physical
-           file called targetpath.
-        """
-        # Fetch the TarInfo object for the given name
-        # and build the destination pathname, replacing
-        # forward slashes to platform specific separators.
-        targetpath = targetpath.rstrip("/")
-        targetpath = targetpath.replace("/", os.sep)
-
-        # Create all upper directories.
-        upperdirs = os.path.dirname(targetpath)
-        if upperdirs and not os.path.exists(upperdirs):
-            # Create directories that are not part of the archive with
-            # default permissions.
-            os.makedirs(upperdirs)
-
-        if tarinfo.islnk() or tarinfo.issym():
-            self._dbg(1, "%s -> %s" % (tarinfo.name, tarinfo.linkname))
-        else:
-            self._dbg(1, tarinfo.name)
-
-        if tarinfo.isreg():
-            self.makefile(tarinfo, targetpath)
-        elif tarinfo.isdir():
-            self.makedir(tarinfo, targetpath)
-        elif tarinfo.isfifo():
-            self.makefifo(tarinfo, targetpath)
-        elif tarinfo.ischr() or tarinfo.isblk():
-            self.makedev(tarinfo, targetpath)
-        elif tarinfo.islnk() or tarinfo.issym():
-            self.makelink(tarinfo, targetpath)
-        elif tarinfo.type not in SUPPORTED_TYPES:
-            self.makeunknown(tarinfo, targetpath)
-        else:
-            self.makefile(tarinfo, targetpath)
-
-        if set_attrs:
-            self.chown(tarinfo, targetpath)
-            if not tarinfo.issym():
-                self.chmod(tarinfo, targetpath)
-                self.utime(tarinfo, targetpath)
-
-    #--------------------------------------------------------------------------
-    # Below are the different file methods. They are called via
-    # _extract_member() when extract() is called. They can be replaced in a
-    # subclass to implement other functionality.
-
-    def makedir(self, tarinfo, targetpath):
-        """Make a directory called targetpath.
-        """
-        try:
-            # Use a safe mode for the directory, the real mode is set
-            # later in _extract_member().
-            os.mkdir(targetpath, 0o700)
-        except EnvironmentError as e:
-            if e.errno != errno.EEXIST:
-                raise
-
-    def makefile(self, tarinfo, targetpath):
-        """Make a file called targetpath.
-        """
-        source = self.fileobj
-        source.seek(tarinfo.offset_data)
-        target = bltn_open(targetpath, "wb")
-        if tarinfo.sparse is not None:
-            for offset, size in tarinfo.sparse:
-                target.seek(offset)
-                copyfileobj(source, target, size)
-        else:
-            copyfileobj(source, target, tarinfo.size)
-        target.seek(tarinfo.size)
-        target.truncate()
-        target.close()
-
-    def makeunknown(self, tarinfo, targetpath):
-        """Make a file from a TarInfo object with an unknown type
-           at targetpath.
-        """
-        self.makefile(tarinfo, targetpath)
-        self._dbg(1, "tarfile: Unknown file type %r, " \
-                     "extracted as regular file." % tarinfo.type)
-
-    def makefifo(self, tarinfo, targetpath):
-        """Make a fifo called targetpath.
-        """
-        if hasattr(os, "mkfifo"):
-            os.mkfifo(targetpath)
-        else:
-            raise ExtractError("fifo not supported by system")
-
-    def makedev(self, tarinfo, targetpath):
-        """Make a character or block device called targetpath.
-        """
-        if not hasattr(os, "mknod") or not hasattr(os, "makedev"):
-            raise ExtractError("special devices not supported by system")
-
-        mode = tarinfo.mode
-        if tarinfo.isblk():
-            mode |= stat.S_IFBLK
-        else:
-            mode |= stat.S_IFCHR
-
-        os.mknod(targetpath, mode,
-                 os.makedev(tarinfo.devmajor, tarinfo.devminor))
-
-    def makelink(self, tarinfo, targetpath):
-        """Make a (symbolic) link called targetpath. If it cannot be created
-          (platform limitation), we try to make a copy of the referenced file
-          instead of a link.
-        """
-        try:
-            # For systems that support symbolic and hard links.
-            if tarinfo.issym():
-                os.symlink(tarinfo.linkname, targetpath)
-            else:
-                # See extract().
-                if os.path.exists(tarinfo._link_target):
-                    os.link(tarinfo._link_target, targetpath)
-                else:
-                    self._extract_member(self._find_link_target(tarinfo),
-                                         targetpath)
-        except symlink_exception:
-            if tarinfo.issym():
-                linkpath = os.path.join(os.path.dirname(tarinfo.name),
-                                        tarinfo.linkname)
-            else:
-                linkpath = tarinfo.linkname
-        else:
-            try:
-                self._extract_member(self._find_link_target(tarinfo),
-                                     targetpath)
-            except KeyError:
-                raise ExtractError("unable to resolve link inside archive")
-
-    def chown(self, tarinfo, targetpath):
-        """Set owner of targetpath according to tarinfo.
-        """
-        if pwd and hasattr(os, "geteuid") and os.geteuid() == 0:
-            # We have to be root to do so.
-            try:
-                g = grp.getgrnam(tarinfo.gname)[2]
-            except KeyError:
-                g = tarinfo.gid
-            try:
-                u = pwd.getpwnam(tarinfo.uname)[2]
-            except KeyError:
-                u = tarinfo.uid
-            try:
-                if tarinfo.issym() and hasattr(os, "lchown"):
-                    os.lchown(targetpath, u, g)
-                else:
-                    if sys.platform != "os2emx":
-                        os.chown(targetpath, u, g)
-            except EnvironmentError as e:
-                raise ExtractError("could not change owner")
-
-    def chmod(self, tarinfo, targetpath):
-        """Set file permissions of targetpath according to tarinfo.
-        """
-        if hasattr(os, 'chmod'):
-            try:
-                os.chmod(targetpath, tarinfo.mode)
-            except EnvironmentError as e:
-                raise ExtractError("could not change mode")
-
-    def utime(self, tarinfo, targetpath):
-        """Set modification time of targetpath according to tarinfo.
-        """
-        if not hasattr(os, 'utime'):
-            return
-        try:
-            os.utime(targetpath, (tarinfo.mtime, tarinfo.mtime))
-        except EnvironmentError as e:
-            raise ExtractError("could not change modification time")
-
-    #--------------------------------------------------------------------------
-    def next(self):
-        """Return the next member of the archive as a TarInfo object, when
-           TarFile is opened for reading. Return None if there is no more
-           available.
-        """
-        self._check("ra")
-        if self.firstmember is not None:
-            m = self.firstmember
-            self.firstmember = None
-            return m
-
-        # Read the next block.
-        self.fileobj.seek(self.offset)
-        tarinfo = None
-        while True:
-            try:
-                tarinfo = self.tarinfo.fromtarfile(self)
-            except EOFHeaderError as e:
-                if self.ignore_zeros:
-                    self._dbg(2, "0x%X: %s" % (self.offset, e))
-                    self.offset += BLOCKSIZE
-                    continue
-            except InvalidHeaderError as e:
-                if self.ignore_zeros:
-                    self._dbg(2, "0x%X: %s" % (self.offset, e))
-                    self.offset += BLOCKSIZE
-                    continue
-                elif self.offset == 0:
-                    raise ReadError(str(e))
-            except EmptyHeaderError:
-                if self.offset == 0:
-                    raise ReadError("empty file")
-            except TruncatedHeaderError as e:
-                if self.offset == 0:
-                    raise ReadError(str(e))
-            except SubsequentHeaderError as e:
-                raise ReadError(str(e))
-            break
-
-        if tarinfo is not None:
-            self.members.append(tarinfo)
-        else:
-            self._loaded = True
-
-        return tarinfo
-
-    #--------------------------------------------------------------------------
-    # Little helper methods:
-
-    def _getmember(self, name, tarinfo=None, normalize=False):
-        """Find an archive member by name from bottom to top.
-           If tarinfo is given, it is used as the starting point.
-        """
-        # Ensure that all members have been loaded.
-        members = self.getmembers()
-
-        # Limit the member search list up to tarinfo.
-        if tarinfo is not None:
-            members = members[:members.index(tarinfo)]
-
-        if normalize:
-            name = os.path.normpath(name)
-
-        for member in reversed(members):
-            if normalize:
-                member_name = os.path.normpath(member.name)
-            else:
-                member_name = member.name
-
-            if name == member_name:
-                return member
-
-    def _load(self):
-        """Read through the entire archive file and look for readable
-           members.
-        """
-        while True:
-            tarinfo = self.next()
-            if tarinfo is None:
-                break
-        self._loaded = True
-
-    def _check(self, mode=None):
-        """Check if TarFile is still open, and if the operation's mode
-           corresponds to TarFile's mode.
-        """
-        if self.closed:
-            raise IOError("%s is closed" % self.__class__.__name__)
-        if mode is not None and self.mode not in mode:
-            raise IOError("bad operation for mode %r" % self.mode)
-
-    def _find_link_target(self, tarinfo):
-        """Find the target member of a symlink or hardlink member in the
-           archive.
-        """
-        if tarinfo.issym():
-            # Always search the entire archive.
-            linkname = os.path.dirname(tarinfo.name) + "/" + tarinfo.linkname
-            limit = None
-        else:
-            # Search the archive before the link, because a hard link is
-            # just a reference to an already archived file.
-            linkname = tarinfo.linkname
-            limit = tarinfo
-
-        member = self._getmember(linkname, tarinfo=limit, normalize=True)
-        if member is None:
-            raise KeyError("linkname %r not found" % linkname)
-        return member
-
-    def __iter__(self):
-        """Provide an iterator object.
-        """
-        if self._loaded:
-            return iter(self.members)
-        else:
-            return TarIter(self)
-
-    def _dbg(self, level, msg):
-        """Write debugging output to sys.stderr.
-        """
-        if level <= self.debug:
-            print(msg, file=sys.stderr)
-
-    def __enter__(self):
-        self._check()
-        return self
-
-    def __exit__(self, type, value, traceback):
-        if type is None:
-            self.close()
-        else:
-            # An exception occurred. We must not call close() because
-            # it would try to write end-of-archive blocks and padding.
-            if not self._extfileobj:
-                self.fileobj.close()
-            self.closed = True
-# class TarFile
-
-class TarIter(object):
-    """Iterator Class.
-
-       for tarinfo in TarFile(...):
-           suite...
-    """
-
-    def __init__(self, tarfile):
-        """Construct a TarIter object.
-        """
-        self.tarfile = tarfile
-        self.index = 0
-    def __iter__(self):
-        """Return iterator object.
-        """
-        return self
-
-    def __next__(self):
-        """Return the next item using TarFile's next() method.
-           When all members have been read, set TarFile as _loaded.
-        """
-        # Fix for SF #1100429: Under rare circumstances it can
-        # happen that getmembers() is called during iteration,
-        # which will cause TarIter to stop prematurely.
-        if not self.tarfile._loaded:
-            tarinfo = self.tarfile.next()
-            if not tarinfo:
-                self.tarfile._loaded = True
-                raise StopIteration
-        else:
-            try:
-                tarinfo = self.tarfile.members[self.index]
-            except IndexError:
-                raise StopIteration
-        self.index += 1
-        return tarinfo
-
-    next = __next__ # for Python 2.x
-
-#--------------------
-# exported functions
-#--------------------
-def is_tarfile(name):
-    """Return True if name points to a tar archive that we
-       are able to handle, else return False.
-    """
-    try:
-        t = open(name)
-        t.close()
-        return True
-    except TarError:
-        return False
-
-bltn_open = open
-open = TarFile.open
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/compat.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/compat.py
deleted file mode 100644
index ff328c8..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/compat.py
+++ /dev/null
@@ -1,1120 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-# Copyright (C) 2013-2017 Vinay Sajip.
-# Licensed to the Python Software Foundation under a contributor agreement.
-# See LICENSE.txt and CONTRIBUTORS.txt.
-#
-from __future__ import absolute_import
-
-import os
-import re
-import sys
-
-try:
-    import ssl
-except ImportError:  # pragma: no cover
-    ssl = None
-
-if sys.version_info[0] < 3:  # pragma: no cover
-    from StringIO import StringIO
-    string_types = basestring,
-    text_type = unicode
-    from types import FileType as file_type
-    import __builtin__ as builtins
-    import ConfigParser as configparser
-    from ._backport import shutil
-    from urlparse import urlparse, urlunparse, urljoin, urlsplit, urlunsplit
-    from urllib import (urlretrieve, quote as _quote, unquote, url2pathname,
-                        pathname2url, ContentTooShortError, splittype)
-
-    def quote(s):
-        if isinstance(s, unicode):
-            s = s.encode('utf-8')
-        return _quote(s)
-
-    import urllib2
-    from urllib2 import (Request, urlopen, URLError, HTTPError,
-                         HTTPBasicAuthHandler, HTTPPasswordMgr,
-                         HTTPHandler, HTTPRedirectHandler,
-                         build_opener)
-    if ssl:
-        from urllib2 import HTTPSHandler
-    import httplib
-    import xmlrpclib
-    import Queue as queue
-    from HTMLParser import HTMLParser
-    import htmlentitydefs
-    raw_input = raw_input
-    from itertools import ifilter as filter
-    from itertools import ifilterfalse as filterfalse
-
-    _userprog = None
-    def splituser(host):
-        """splituser('user[:passwd]@host[:port]') --> 'user[:passwd]', 'host[:port]'."""
-        global _userprog
-        if _userprog is None:
-            import re
-            _userprog = re.compile('^(.*)@(.*)$')
-
-        match = _userprog.match(host)
-        if match: return match.group(1, 2)
-        return None, host
-
-else:  # pragma: no cover
-    from io import StringIO
-    string_types = str,
-    text_type = str
-    from io import TextIOWrapper as file_type
-    import builtins
-    import configparser
-    import shutil
-    from urllib.parse import (urlparse, urlunparse, urljoin, splituser, quote,
-                              unquote, urlsplit, urlunsplit, splittype)
-    from urllib.request import (urlopen, urlretrieve, Request, url2pathname,
-                                pathname2url,
-                                HTTPBasicAuthHandler, HTTPPasswordMgr,
-                                HTTPHandler, HTTPRedirectHandler,
-                                build_opener)
-    if ssl:
-        from urllib.request import HTTPSHandler
-    from urllib.error import HTTPError, URLError, ContentTooShortError
-    import http.client as httplib
-    import urllib.request as urllib2
-    import xmlrpc.client as xmlrpclib
-    import queue
-    from html.parser import HTMLParser
-    import html.entities as htmlentitydefs
-    raw_input = input
-    from itertools import filterfalse
-    filter = filter
-
-try:
-    from ssl import match_hostname, CertificateError
-except ImportError: # pragma: no cover
-    class CertificateError(ValueError):
-        pass
-
-
-    def _dnsname_match(dn, hostname, max_wildcards=1):
-        """Matching according to RFC 6125, section 6.4.3
-
-        http://tools.ietf.org/html/rfc6125#section-6.4.3
-        """
-        pats = []
-        if not dn:
-            return False
-
-        parts = dn.split('.')
-        leftmost, remainder = parts[0], parts[1:]
-
-        wildcards = leftmost.count('*')
-        if wildcards > max_wildcards:
-            # Issue #17980: avoid denials of service by refusing more
-            # than one wildcard per fragment.  A survey of established
-            # policy among SSL implementations showed it to be a
-            # reasonable choice.
-            raise CertificateError(
-                "too many wildcards in certificate DNS name: " + repr(dn))
-
-        # speed up common case w/o wildcards
-        if not wildcards:
-            return dn.lower() == hostname.lower()
-
-        # RFC 6125, section 6.4.3, subitem 1.
-        # The client SHOULD NOT attempt to match a presented identifier in which
-        # the wildcard character comprises a label other than the left-most label.
-        if leftmost == '*':
-            # When '*' is a fragment by itself, it matches a non-empty dotless
-            # fragment.
-            pats.append('[^.]+')
-        elif leftmost.startswith('xn--') or hostname.startswith('xn--'):
-            # RFC 6125, section 6.4.3, subitem 3.
-            # The client SHOULD NOT attempt to match a presented identifier
-            # where the wildcard character is embedded within an A-label or
-            # U-label of an internationalized domain name.
-            pats.append(re.escape(leftmost))
-        else:
-            # Otherwise, '*' matches any dotless string, e.g. www*
-            pats.append(re.escape(leftmost).replace(r'\*', '[^.]*'))
-
-        # add the remaining fragments, ignore any wildcards
-        for frag in remainder:
-            pats.append(re.escape(frag))
-
-        pat = re.compile(r'\A' + r'\.'.join(pats) + r'\Z', re.IGNORECASE)
-        return pat.match(hostname)
-
-
-    def match_hostname(cert, hostname):
-        """Verify that *cert* (in decoded format as returned by
-        SSLSocket.getpeercert()) matches the *hostname*.  RFC 2818 and RFC 6125
-        rules are followed, but IP addresses are not accepted for *hostname*.
-
-        CertificateError is raised on failure. On success, the function
-        returns nothing.
-        """
-        if not cert:
-            raise ValueError("empty or no certificate, match_hostname needs a "
-                             "SSL socket or SSL context with either "
-                             "CERT_OPTIONAL or CERT_REQUIRED")
-        dnsnames = []
-        san = cert.get('subjectAltName', ())
-        for key, value in san:
-            if key == 'DNS':
-                if _dnsname_match(value, hostname):
-                    return
-                dnsnames.append(value)
-        if not dnsnames:
-            # The subject is only checked when there is no dNSName entry
-            # in subjectAltName
-            for sub in cert.get('subject', ()):
-                for key, value in sub:
-                    # XXX according to RFC 2818, the most specific Common Name
-                    # must be used.
-                    if key == 'commonName':
-                        if _dnsname_match(value, hostname):
-                            return
-                        dnsnames.append(value)
-        if len(dnsnames) > 1:
-            raise CertificateError("hostname %r "
-                "doesn't match either of %s"
-                % (hostname, ', '.join(map(repr, dnsnames))))
-        elif len(dnsnames) == 1:
-            raise CertificateError("hostname %r "
-                "doesn't match %r"
-                % (hostname, dnsnames[0]))
-        else:
-            raise CertificateError("no appropriate commonName or "
-                "subjectAltName fields were found")
-
-
-try:
-    from types import SimpleNamespace as Container
-except ImportError:  # pragma: no cover
-    class Container(object):
-        """
-        A generic container for when multiple values need to be returned
-        """
-        def __init__(self, **kwargs):
-            self.__dict__.update(kwargs)
-
-
-try:
-    from shutil import which
-except ImportError:  # pragma: no cover
-    # Implementation from Python 3.3
-    def which(cmd, mode=os.F_OK | os.X_OK, path=None):
-        """Given a command, mode, and a PATH string, return the path which
-        conforms to the given mode on the PATH, or None if there is no such
-        file.
-
-        `mode` defaults to os.F_OK | os.X_OK. `path` defaults to the result
-        of os.environ.get("PATH"), or can be overridden with a custom search
-        path.
-
-        """
-        # Check that a given file can be accessed with the correct mode.
-        # Additionally check that `file` is not a directory, as on Windows
-        # directories pass the os.access check.
-        def _access_check(fn, mode):
-            return (os.path.exists(fn) and os.access(fn, mode)
-                    and not os.path.isdir(fn))
-
-        # If we're given a path with a directory part, look it up directly rather
-        # than referring to PATH directories. This includes checking relative to the
-        # current directory, e.g. ./script
-        if os.path.dirname(cmd):
-            if _access_check(cmd, mode):
-                return cmd
-            return None
-
-        if path is None:
-            path = os.environ.get("PATH", os.defpath)
-        if not path:
-            return None
-        path = path.split(os.pathsep)
-
-        if sys.platform == "win32":
-            # The current directory takes precedence on Windows.
-            if not os.curdir in path:
-                path.insert(0, os.curdir)
-
-            # PATHEXT is necessary to check on Windows.
-            pathext = os.environ.get("PATHEXT", "").split(os.pathsep)
-            # See if the given file matches any of the expected path extensions.
-            # This will allow us to short circuit when given "python.exe".
-            # If it does match, only test that one, otherwise we have to try
-            # others.
-            if any(cmd.lower().endswith(ext.lower()) for ext in pathext):
-                files = [cmd]
-            else:
-                files = [cmd + ext for ext in pathext]
-        else:
-            # On other platforms you don't have things like PATHEXT to tell you
-            # what file suffixes are executable, so just pass on cmd as-is.
-            files = [cmd]
-
-        seen = set()
-        for dir in path:
-            normdir = os.path.normcase(dir)
-            if not normdir in seen:
-                seen.add(normdir)
-                for thefile in files:
-                    name = os.path.join(dir, thefile)
-                    if _access_check(name, mode):
-                        return name
-        return None
-
-
-# ZipFile is a context manager in 2.7, but not in 2.6
-
-from zipfile import ZipFile as BaseZipFile
-
-if hasattr(BaseZipFile, '__enter__'):  # pragma: no cover
-    ZipFile = BaseZipFile
-else:  # pragma: no cover
-    from zipfile import ZipExtFile as BaseZipExtFile
-
-    class ZipExtFile(BaseZipExtFile):
-        def __init__(self, base):
-            self.__dict__.update(base.__dict__)
-
-        def __enter__(self):
-            return self
-
-        def __exit__(self, *exc_info):
-            self.close()
-            # return None, so if an exception occurred, it will propagate
-
-    class ZipFile(BaseZipFile):
-        def __enter__(self):
-            return self
-
-        def __exit__(self, *exc_info):
-            self.close()
-            # return None, so if an exception occurred, it will propagate
-
-        def open(self, *args, **kwargs):
-            base = BaseZipFile.open(self, *args, **kwargs)
-            return ZipExtFile(base)
-
-try:
-    from platform import python_implementation
-except ImportError: # pragma: no cover
-    def python_implementation():
-        """Return a string identifying the Python implementation."""
-        if 'PyPy' in sys.version:
-            return 'PyPy'
-        if os.name == 'java':
-            return 'Jython'
-        if sys.version.startswith('IronPython'):
-            return 'IronPython'
-        return 'CPython'
-
-try:
-    import sysconfig
-except ImportError: # pragma: no cover
-    from ._backport import sysconfig
-
-try:
-    callable = callable
-except NameError:   # pragma: no cover
-    from collections import Callable
-
-    def callable(obj):
-        return isinstance(obj, Callable)
-
-
-try:
-    fsencode = os.fsencode
-    fsdecode = os.fsdecode
-except AttributeError:  # pragma: no cover
-    # Issue #99: on some systems (e.g. containerised),
-    # sys.getfilesystemencoding() returns None, and we need a real value,
-    # so fall back to utf-8. From the CPython 2.7 docs relating to Unix and
-    # sys.getfilesystemencoding(): the return value is "the user’s preference
-    # according to the result of nl_langinfo(CODESET), or None if the
-    # nl_langinfo(CODESET) failed."
-    _fsencoding = sys.getfilesystemencoding() or 'utf-8'
-    if _fsencoding == 'mbcs':
-        _fserrors = 'strict'
-    else:
-        _fserrors = 'surrogateescape'
-
-    def fsencode(filename):
-        if isinstance(filename, bytes):
-            return filename
-        elif isinstance(filename, text_type):
-            return filename.encode(_fsencoding, _fserrors)
-        else:
-            raise TypeError("expect bytes or str, not %s" %
-                            type(filename).__name__)
-
-    def fsdecode(filename):
-        if isinstance(filename, text_type):
-            return filename
-        elif isinstance(filename, bytes):
-            return filename.decode(_fsencoding, _fserrors)
-        else:
-            raise TypeError("expect bytes or str, not %s" %
-                            type(filename).__name__)
-
-try:
-    from tokenize import detect_encoding
-except ImportError: # pragma: no cover
-    from codecs import BOM_UTF8, lookup
-    import re
-
-    cookie_re = re.compile(r"coding[:=]\s*([-\w.]+)")
-
-    def _get_normal_name(orig_enc):
-        """Imitates get_normal_name in tokenizer.c."""
-        # Only care about the first 12 characters.
-        enc = orig_enc[:12].lower().replace("_", "-")
-        if enc == "utf-8" or enc.startswith("utf-8-"):
-            return "utf-8"
-        if enc in ("latin-1", "iso-8859-1", "iso-latin-1") or \
-           enc.startswith(("latin-1-", "iso-8859-1-", "iso-latin-1-")):
-            return "iso-8859-1"
-        return orig_enc
-
-    def detect_encoding(readline):
-        """
-        The detect_encoding() function is used to detect the encoding that should
-        be used to decode a Python source file.  It requires one argument, readline,
-        in the same way as the tokenize() generator.
-
-        It will call readline a maximum of twice, and return the encoding used
-        (as a string) and a list of any lines (left as bytes) it has read in.
-
-        It detects the encoding from the presence of a utf-8 bom or an encoding
-        cookie as specified in pep-0263.  If both a bom and a cookie are present,
-        but disagree, a SyntaxError will be raised.  If the encoding cookie is an
-        invalid charset, raise a SyntaxError.  Note that if a utf-8 bom is found,
-        'utf-8-sig' is returned.
-
-        If no encoding is specified, then the default of 'utf-8' will be returned.
-        """
-        try:
-            filename = readline.__self__.name
-        except AttributeError:
-            filename = None
-        bom_found = False
-        encoding = None
-        default = 'utf-8'
-        def read_or_stop():
-            try:
-                return readline()
-            except StopIteration:
-                return b''
-
-        def find_cookie(line):
-            try:
-                # Decode as UTF-8. Either the line is an encoding declaration,
-                # in which case it should be pure ASCII, or it must be UTF-8
-                # per default encoding.
-                line_string = line.decode('utf-8')
-            except UnicodeDecodeError:
-                msg = "invalid or missing encoding declaration"
-                if filename is not None:
-                    msg = '{} for {!r}'.format(msg, filename)
-                raise SyntaxError(msg)
-
-            matches = cookie_re.findall(line_string)
-            if not matches:
-                return None
-            encoding = _get_normal_name(matches[0])
-            try:
-                codec = lookup(encoding)
-            except LookupError:
-                # This behaviour mimics the Python interpreter
-                if filename is None:
-                    msg = "unknown encoding: " + encoding
-                else:
-                    msg = "unknown encoding for {!r}: {}".format(filename,
-                            encoding)
-                raise SyntaxError(msg)
-
-            if bom_found:
-                if codec.name != 'utf-8':
-                    # This behaviour mimics the Python interpreter
-                    if filename is None:
-                        msg = 'encoding problem: utf-8'
-                    else:
-                        msg = 'encoding problem for {!r}: utf-8'.format(filename)
-                    raise SyntaxError(msg)
-                encoding += '-sig'
-            return encoding
-
-        first = read_or_stop()
-        if first.startswith(BOM_UTF8):
-            bom_found = True
-            first = first[3:]
-            default = 'utf-8-sig'
-        if not first:
-            return default, []
-
-        encoding = find_cookie(first)
-        if encoding:
-            return encoding, [first]
-
-        second = read_or_stop()
-        if not second:
-            return default, [first]
-
-        encoding = find_cookie(second)
-        if encoding:
-            return encoding, [first, second]
-
-        return default, [first, second]
-
-# For converting & <-> &amp; etc.
-try:
-    from html import escape
-except ImportError:
-    from cgi import escape
-if sys.version_info[:2] < (3, 4):
-    unescape = HTMLParser().unescape
-else:
-    from html import unescape
-
-try:
-    from collections import ChainMap
-except ImportError: # pragma: no cover
-    from collections import MutableMapping
-
-    try:
-        from reprlib import recursive_repr as _recursive_repr
-    except ImportError:
-        def _recursive_repr(fillvalue='...'):
-            '''
-            Decorator to make a repr function return fillvalue for a recursive
-            call
-            '''
-
-            def decorating_function(user_function):
-                repr_running = set()
-
-                def wrapper(self):
-                    key = id(self), get_ident()
-                    if key in repr_running:
-                        return fillvalue
-                    repr_running.add(key)
-                    try:
-                        result = user_function(self)
-                    finally:
-                        repr_running.discard(key)
-                    return result
-
-                # Can't use functools.wraps() here because of bootstrap issues
-                wrapper.__module__ = getattr(user_function, '__module__')
-                wrapper.__doc__ = getattr(user_function, '__doc__')
-                wrapper.__name__ = getattr(user_function, '__name__')
-                wrapper.__annotations__ = getattr(user_function, '__annotations__', {})
-                return wrapper
-
-            return decorating_function
-
-    class ChainMap(MutableMapping):
-        ''' A ChainMap groups multiple dicts (or other mappings) together
-        to create a single, updateable view.
-
-        The underlying mappings are stored in a list.  That list is public and can
-        accessed or updated using the *maps* attribute.  There is no other state.
-
-        Lookups search the underlying mappings successively until a key is found.
-        In contrast, writes, updates, and deletions only operate on the first
-        mapping.
-
-        '''
-
-        def __init__(self, *maps):
-            '''Initialize a ChainMap by setting *maps* to the given mappings.
-            If no mappings are provided, a single empty dictionary is used.
-
-            '''
-            self.maps = list(maps) or [{}]          # always at least one map
-
-        def __missing__(self, key):
-            raise KeyError(key)
-
-        def __getitem__(self, key):
-            for mapping in self.maps:
-                try:
-                    return mapping[key]             # can't use 'key in mapping' with defaultdict
-                except KeyError:
-                    pass
-            return self.__missing__(key)            # support subclasses that define __missing__
-
-        def get(self, key, default=None):
-            return self[key] if key in self else default
-
-        def __len__(self):
-            return len(set().union(*self.maps))     # reuses stored hash values if possible
-
-        def __iter__(self):
-            return iter(set().union(*self.maps))
-
-        def __contains__(self, key):
-            return any(key in m for m in self.maps)
-
-        def __bool__(self):
-            return any(self.maps)
-
-        @_recursive_repr()
-        def __repr__(self):
-            return '{0.__class__.__name__}({1})'.format(
-                self, ', '.join(map(repr, self.maps)))
-
-        @classmethod
-        def fromkeys(cls, iterable, *args):
-            'Create a ChainMap with a single dict created from the iterable.'
-            return cls(dict.fromkeys(iterable, *args))
-
-        def copy(self):
-            'New ChainMap or subclass with a new copy of maps[0] and refs to maps[1:]'
-            return self.__class__(self.maps[0].copy(), *self.maps[1:])
-
-        __copy__ = copy
-
-        def new_child(self):                        # like Django's Context.push()
-            'New ChainMap with a new dict followed by all previous maps.'
-            return self.__class__({}, *self.maps)
-
-        @property
-        def parents(self):                          # like Django's Context.pop()
-            'New ChainMap from maps[1:].'
-            return self.__class__(*self.maps[1:])
-
-        def __setitem__(self, key, value):
-            self.maps[0][key] = value
-
-        def __delitem__(self, key):
-            try:
-                del self.maps[0][key]
-            except KeyError:
-                raise KeyError('Key not found in the first mapping: {!r}'.format(key))
-
-        def popitem(self):
-            'Remove and return an item pair from maps[0]. Raise KeyError is maps[0] is empty.'
-            try:
-                return self.maps[0].popitem()
-            except KeyError:
-                raise KeyError('No keys found in the first mapping.')
-
-        def pop(self, key, *args):
-            'Remove *key* from maps[0] and return its value. Raise KeyError if *key* not in maps[0].'
-            try:
-                return self.maps[0].pop(key, *args)
-            except KeyError:
-                raise KeyError('Key not found in the first mapping: {!r}'.format(key))
-
-        def clear(self):
-            'Clear maps[0], leaving maps[1:] intact.'
-            self.maps[0].clear()
-
-try:
-    from importlib.util import cache_from_source  # Python >= 3.4
-except ImportError:  # pragma: no cover
-    try:
-        from imp import cache_from_source
-    except ImportError:  # pragma: no cover
-        def cache_from_source(path, debug_override=None):
-            assert path.endswith('.py')
-            if debug_override is None:
-                debug_override = __debug__
-            if debug_override:
-                suffix = 'c'
-            else:
-                suffix = 'o'
-            return path + suffix
-
-try:
-    from collections import OrderedDict
-except ImportError: # pragma: no cover
-## {{{ http://code.activestate.com/recipes/576693/ (r9)
-# Backport of OrderedDict() class that runs on Python 2.4, 2.5, 2.6, 2.7 and pypy.
-# Passes Python2.7's test suite and incorporates all the latest updates.
-    try:
-        from thread import get_ident as _get_ident
-    except ImportError:
-        from dummy_thread import get_ident as _get_ident
-
-    try:
-        from _abcoll import KeysView, ValuesView, ItemsView
-    except ImportError:
-        pass
-
-
-    class OrderedDict(dict):
-        'Dictionary that remembers insertion order'
-        # An inherited dict maps keys to values.
-        # The inherited dict provides __getitem__, __len__, __contains__, and get.
-        # The remaining methods are order-aware.
-        # Big-O running times for all methods are the same as for regular dictionaries.
-
-        # The internal self.__map dictionary maps keys to links in a doubly linked list.
-        # The circular doubly linked list starts and ends with a sentinel element.
-        # The sentinel element never gets deleted (this simplifies the algorithm).
-        # Each link is stored as a list of length three:  [PREV, NEXT, KEY].
-
-        def __init__(self, *args, **kwds):
-            '''Initialize an ordered dictionary.  Signature is the same as for
-            regular dictionaries, but keyword arguments are not recommended
-            because their insertion order is arbitrary.
-
-            '''
-            if len(args) > 1:
-                raise TypeError('expected at most 1 arguments, got %d' % len(args))
-            try:
-                self.__root
-            except AttributeError:
-                self.__root = root = []                     # sentinel node
-                root[:] = [root, root, None]
-                self.__map = {}
-            self.__update(*args, **kwds)
-
-        def __setitem__(self, key, value, dict_setitem=dict.__setitem__):
-            'od.__setitem__(i, y) <==> od[i]=y'
-            # Setting a new item creates a new link which goes at the end of the linked
-            # list, and the inherited dictionary is updated with the new key/value pair.
-            if key not in self:
-                root = self.__root
-                last = root[0]
-                last[1] = root[0] = self.__map[key] = [last, root, key]
-            dict_setitem(self, key, value)
-
-        def __delitem__(self, key, dict_delitem=dict.__delitem__):
-            'od.__delitem__(y) <==> del od[y]'
-            # Deleting an existing item uses self.__map to find the link which is
-            # then removed by updating the links in the predecessor and successor nodes.
-            dict_delitem(self, key)
-            link_prev, link_next, key = self.__map.pop(key)
-            link_prev[1] = link_next
-            link_next[0] = link_prev
-
-        def __iter__(self):
-            'od.__iter__() <==> iter(od)'
-            root = self.__root
-            curr = root[1]
-            while curr is not root:
-                yield curr[2]
-                curr = curr[1]
-
-        def __reversed__(self):
-            'od.__reversed__() <==> reversed(od)'
-            root = self.__root
-            curr = root[0]
-            while curr is not root:
-                yield curr[2]
-                curr = curr[0]
-
-        def clear(self):
-            'od.clear() -> None.  Remove all items from od.'
-            try:
-                for node in self.__map.itervalues():
-                    del node[:]
-                root = self.__root
-                root[:] = [root, root, None]
-                self.__map.clear()
-            except AttributeError:
-                pass
-            dict.clear(self)
-
-        def popitem(self, last=True):
-            '''od.popitem() -> (k, v), return and remove a (key, value) pair.
-            Pairs are returned in LIFO order if last is true or FIFO order if false.
-
-            '''
-            if not self:
-                raise KeyError('dictionary is empty')
-            root = self.__root
-            if last:
-                link = root[0]
-                link_prev = link[0]
-                link_prev[1] = root
-                root[0] = link_prev
-            else:
-                link = root[1]
-                link_next = link[1]
-                root[1] = link_next
-                link_next[0] = root
-            key = link[2]
-            del self.__map[key]
-            value = dict.pop(self, key)
-            return key, value
-
-        # -- the following methods do not depend on the internal structure --
-
-        def keys(self):
-            'od.keys() -> list of keys in od'
-            return list(self)
-
-        def values(self):
-            'od.values() -> list of values in od'
-            return [self[key] for key in self]
-
-        def items(self):
-            'od.items() -> list of (key, value) pairs in od'
-            return [(key, self[key]) for key in self]
-
-        def iterkeys(self):
-            'od.iterkeys() -> an iterator over the keys in od'
-            return iter(self)
-
-        def itervalues(self):
-            'od.itervalues -> an iterator over the values in od'
-            for k in self:
-                yield self[k]
-
-        def iteritems(self):
-            'od.iteritems -> an iterator over the (key, value) items in od'
-            for k in self:
-                yield (k, self[k])
-
-        def update(*args, **kwds):
-            '''od.update(E, **F) -> None.  Update od from dict/iterable E and F.
-
-            If E is a dict instance, does:           for k in E: od[k] = E[k]
-            If E has a .keys() method, does:         for k in E.keys(): od[k] = E[k]
-            Or if E is an iterable of items, does:   for k, v in E: od[k] = v
-            In either case, this is followed by:     for k, v in F.items(): od[k] = v
-
-            '''
-            if len(args) > 2:
-                raise TypeError('update() takes at most 2 positional '
-                                'arguments (%d given)' % (len(args),))
-            elif not args:
-                raise TypeError('update() takes at least 1 argument (0 given)')
-            self = args[0]
-            # Make progressively weaker assumptions about "other"
-            other = ()
-            if len(args) == 2:
-                other = args[1]
-            if isinstance(other, dict):
-                for key in other:
-                    self[key] = other[key]
-            elif hasattr(other, 'keys'):
-                for key in other.keys():
-                    self[key] = other[key]
-            else:
-                for key, value in other:
-                    self[key] = value
-            for key, value in kwds.items():
-                self[key] = value
-
-        __update = update  # let subclasses override update without breaking __init__
-
-        __marker = object()
-
-        def pop(self, key, default=__marker):
-            '''od.pop(k[,d]) -> v, remove specified key and return the corresponding value.
-            If key is not found, d is returned if given, otherwise KeyError is raised.
-
-            '''
-            if key in self:
-                result = self[key]
-                del self[key]
-                return result
-            if default is self.__marker:
-                raise KeyError(key)
-            return default
-
-        def setdefault(self, key, default=None):
-            'od.setdefault(k[,d]) -> od.get(k,d), also set od[k]=d if k not in od'
-            if key in self:
-                return self[key]
-            self[key] = default
-            return default
-
-        def __repr__(self, _repr_running=None):
-            'od.__repr__() <==> repr(od)'
-            if not _repr_running: _repr_running = {}
-            call_key = id(self), _get_ident()
-            if call_key in _repr_running:
-                return '...'
-            _repr_running[call_key] = 1
-            try:
-                if not self:
-                    return '%s()' % (self.__class__.__name__,)
-                return '%s(%r)' % (self.__class__.__name__, self.items())
-            finally:
-                del _repr_running[call_key]
-
-        def __reduce__(self):
-            'Return state information for pickling'
-            items = [[k, self[k]] for k in self]
-            inst_dict = vars(self).copy()
-            for k in vars(OrderedDict()):
-                inst_dict.pop(k, None)
-            if inst_dict:
-                return (self.__class__, (items,), inst_dict)
-            return self.__class__, (items,)
-
-        def copy(self):
-            'od.copy() -> a shallow copy of od'
-            return self.__class__(self)
-
-        @classmethod
-        def fromkeys(cls, iterable, value=None):
-            '''OD.fromkeys(S[, v]) -> New ordered dictionary with keys from S
-            and values equal to v (which defaults to None).
-
-            '''
-            d = cls()
-            for key in iterable:
-                d[key] = value
-            return d
-
-        def __eq__(self, other):
-            '''od.__eq__(y) <==> od==y.  Comparison to another OD is order-sensitive
-            while comparison to a regular mapping is order-insensitive.
-
-            '''
-            if isinstance(other, OrderedDict):
-                return len(self)==len(other) and self.items() == other.items()
-            return dict.__eq__(self, other)
-
-        def __ne__(self, other):
-            return not self == other
-
-        # -- the following methods are only used in Python 2.7 --
-
-        def viewkeys(self):
-            "od.viewkeys() -> a set-like object providing a view on od's keys"
-            return KeysView(self)
-
-        def viewvalues(self):
-            "od.viewvalues() -> an object providing a view on od's values"
-            return ValuesView(self)
-
-        def viewitems(self):
-            "od.viewitems() -> a set-like object providing a view on od's items"
-            return ItemsView(self)
-
-try:
-    from logging.config import BaseConfigurator, valid_ident
-except ImportError: # pragma: no cover
-    IDENTIFIER = re.compile('^[a-z_][a-z0-9_]*$', re.I)
-
-
-    def valid_ident(s):
-        m = IDENTIFIER.match(s)
-        if not m:
-            raise ValueError('Not a valid Python identifier: %r' % s)
-        return True
-
-
-    # The ConvertingXXX classes are wrappers around standard Python containers,
-    # and they serve to convert any suitable values in the container. The
-    # conversion converts base dicts, lists and tuples to their wrapped
-    # equivalents, whereas strings which match a conversion format are converted
-    # appropriately.
-    #
-    # Each wrapper should have a configurator attribute holding the actual
-    # configurator to use for conversion.
-
-    class ConvertingDict(dict):
-        """A converting dictionary wrapper."""
-
-        def __getitem__(self, key):
-            value = dict.__getitem__(self, key)
-            result = self.configurator.convert(value)
-            #If the converted value is different, save for next time
-            if value is not result:
-                self[key] = result
-                if type(result) in (ConvertingDict, ConvertingList,
-                                    ConvertingTuple):
-                    result.parent = self
-                    result.key = key
-            return result
-
-        def get(self, key, default=None):
-            value = dict.get(self, key, default)
-            result = self.configurator.convert(value)
-            #If the converted value is different, save for next time
-            if value is not result:
-                self[key] = result
-                if type(result) in (ConvertingDict, ConvertingList,
-                                    ConvertingTuple):
-                    result.parent = self
-                    result.key = key
-            return result
-
-    def pop(self, key, default=None):
-        value = dict.pop(self, key, default)
-        result = self.configurator.convert(value)
-        if value is not result:
-            if type(result) in (ConvertingDict, ConvertingList,
-                                ConvertingTuple):
-                result.parent = self
-                result.key = key
-        return result
-
-    class ConvertingList(list):
-        """A converting list wrapper."""
-        def __getitem__(self, key):
-            value = list.__getitem__(self, key)
-            result = self.configurator.convert(value)
-            #If the converted value is different, save for next time
-            if value is not result:
-                self[key] = result
-                if type(result) in (ConvertingDict, ConvertingList,
-                                    ConvertingTuple):
-                    result.parent = self
-                    result.key = key
-            return result
-
-        def pop(self, idx=-1):
-            value = list.pop(self, idx)
-            result = self.configurator.convert(value)
-            if value is not result:
-                if type(result) in (ConvertingDict, ConvertingList,
-                                    ConvertingTuple):
-                    result.parent = self
-            return result
-
-    class ConvertingTuple(tuple):
-        """A converting tuple wrapper."""
-        def __getitem__(self, key):
-            value = tuple.__getitem__(self, key)
-            result = self.configurator.convert(value)
-            if value is not result:
-                if type(result) in (ConvertingDict, ConvertingList,
-                                    ConvertingTuple):
-                    result.parent = self
-                    result.key = key
-            return result
-
-    class BaseConfigurator(object):
-        """
-        The configurator base class which defines some useful defaults.
-        """
-
-        CONVERT_PATTERN = re.compile(r'^(?P<prefix>[a-z]+)://(?P<suffix>.*)$')
-
-        WORD_PATTERN = re.compile(r'^\s*(\w+)\s*')
-        DOT_PATTERN = re.compile(r'^\.\s*(\w+)\s*')
-        INDEX_PATTERN = re.compile(r'^\[\s*(\w+)\s*\]\s*')
-        DIGIT_PATTERN = re.compile(r'^\d+$')
-
-        value_converters = {
-            'ext' : 'ext_convert',
-            'cfg' : 'cfg_convert',
-        }
-
-        # We might want to use a different one, e.g. importlib
-        importer = staticmethod(__import__)
-
-        def __init__(self, config):
-            self.config = ConvertingDict(config)
-            self.config.configurator = self
-
-        def resolve(self, s):
-            """
-            Resolve strings to objects using standard import and attribute
-            syntax.
-            """
-            name = s.split('.')
-            used = name.pop(0)
-            try:
-                found = self.importer(used)
-                for frag in name:
-                    used += '.' + frag
-                    try:
-                        found = getattr(found, frag)
-                    except AttributeError:
-                        self.importer(used)
-                        found = getattr(found, frag)
-                return found
-            except ImportError:
-                e, tb = sys.exc_info()[1:]
-                v = ValueError('Cannot resolve %r: %s' % (s, e))
-                v.__cause__, v.__traceback__ = e, tb
-                raise v
-
-        def ext_convert(self, value):
-            """Default converter for the ext:// protocol."""
-            return self.resolve(value)
-
-        def cfg_convert(self, value):
-            """Default converter for the cfg:// protocol."""
-            rest = value
-            m = self.WORD_PATTERN.match(rest)
-            if m is None:
-                raise ValueError("Unable to convert %r" % value)
-            else:
-                rest = rest[m.end():]
-                d = self.config[m.groups()[0]]
-                #print d, rest
-                while rest:
-                    m = self.DOT_PATTERN.match(rest)
-                    if m:
-                        d = d[m.groups()[0]]
-                    else:
-                        m = self.INDEX_PATTERN.match(rest)
-                        if m:
-                            idx = m.groups()[0]
-                            if not self.DIGIT_PATTERN.match(idx):
-                                d = d[idx]
-                            else:
-                                try:
-                                    n = int(idx) # try as number first (most likely)
-                                    d = d[n]
-                                except TypeError:
-                                    d = d[idx]
-                    if m:
-                        rest = rest[m.end():]
-                    else:
-                        raise ValueError('Unable to convert '
-                                         '%r at %r' % (value, rest))
-            #rest should be empty
-            return d
-
-        def convert(self, value):
-            """
-            Convert values to an appropriate type. dicts, lists and tuples are
-            replaced by their converting alternatives. Strings are checked to
-            see if they have a conversion format and are converted if they do.
-            """
-            if not isinstance(value, ConvertingDict) and isinstance(value, dict):
-                value = ConvertingDict(value)
-                value.configurator = self
-            elif not isinstance(value, ConvertingList) and isinstance(value, list):
-                value = ConvertingList(value)
-                value.configurator = self
-            elif not isinstance(value, ConvertingTuple) and\
-                     isinstance(value, tuple):
-                value = ConvertingTuple(value)
-                value.configurator = self
-            elif isinstance(value, string_types):
-                m = self.CONVERT_PATTERN.match(value)
-                if m:
-                    d = m.groupdict()
-                    prefix = d['prefix']
-                    converter = self.value_converters.get(prefix, None)
-                    if converter:
-                        suffix = d['suffix']
-                        converter = getattr(self, converter)
-                        value = converter(suffix)
-            return value
-
-        def configure_custom(self, config):
-            """Configure an object with a user-supplied factory."""
-            c = config.pop('()')
-            if not callable(c):
-                c = self.resolve(c)
-            props = config.pop('.', None)
-            # Check for valid identifiers
-            kwargs = dict([(k, config[k]) for k in config if valid_ident(k)])
-            result = c(**kwargs)
-            if props:
-                for name, value in props.items():
-                    setattr(result, name, value)
-            return result
-
-        def as_tuple(self, value):
-            """Utility function which converts lists to tuples."""
-            if isinstance(value, list):
-                value = tuple(value)
-            return value
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/database.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/database.py
deleted file mode 100644
index b13cdac..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/database.py
+++ /dev/null
@@ -1,1339 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-# Copyright (C) 2012-2017 The Python Software Foundation.
-# See LICENSE.txt and CONTRIBUTORS.txt.
-#
-"""PEP 376 implementation."""
-
-from __future__ import unicode_literals
-
-import base64
-import codecs
-import contextlib
-import hashlib
-import logging
-import os
-import posixpath
-import sys
-import zipimport
-
-from . import DistlibException, resources
-from .compat import StringIO
-from .version import get_scheme, UnsupportedVersionError
-from .metadata import (Metadata, METADATA_FILENAME, WHEEL_METADATA_FILENAME,
-                       LEGACY_METADATA_FILENAME)
-from .util import (parse_requirement, cached_property, parse_name_and_version,
-                   read_exports, write_exports, CSVReader, CSVWriter)
-
-
-__all__ = ['Distribution', 'BaseInstalledDistribution',
-           'InstalledDistribution', 'EggInfoDistribution',
-           'DistributionPath']
-
-
-logger = logging.getLogger(__name__)
-
-EXPORTS_FILENAME = 'pydist-exports.json'
-COMMANDS_FILENAME = 'pydist-commands.json'
-
-DIST_FILES = ('INSTALLER', METADATA_FILENAME, 'RECORD', 'REQUESTED',
-              'RESOURCES', EXPORTS_FILENAME, 'SHARED')
-
-DISTINFO_EXT = '.dist-info'
-
-
-class _Cache(object):
-    """
-    A simple cache mapping names and .dist-info paths to distributions
-    """
-    def __init__(self):
-        """
-        Initialise an instance. There is normally one for each DistributionPath.
-        """
-        self.name = {}
-        self.path = {}
-        self.generated = False
-
-    def clear(self):
-        """
-        Clear the cache, setting it to its initial state.
-        """
-        self.name.clear()
-        self.path.clear()
-        self.generated = False
-
-    def add(self, dist):
-        """
-        Add a distribution to the cache.
-        :param dist: The distribution to add.
-        """
-        if dist.path not in self.path:
-            self.path[dist.path] = dist
-            self.name.setdefault(dist.key, []).append(dist)
-
-
-class DistributionPath(object):
-    """
-    Represents a set of distributions installed on a path (typically sys.path).
-    """
-    def __init__(self, path=None, include_egg=False):
-        """
-        Create an instance from a path, optionally including legacy (distutils/
-        setuptools/distribute) distributions.
-        :param path: The path to use, as a list of directories. If not specified,
-                     sys.path is used.
-        :param include_egg: If True, this instance will look for and return legacy
-                            distributions as well as those based on PEP 376.
-        """
-        if path is None:
-            path = sys.path
-        self.path = path
-        self._include_dist = True
-        self._include_egg = include_egg
-
-        self._cache = _Cache()
-        self._cache_egg = _Cache()
-        self._cache_enabled = True
-        self._scheme = get_scheme('default')
-
-    def _get_cache_enabled(self):
-        return self._cache_enabled
-
-    def _set_cache_enabled(self, value):
-        self._cache_enabled = value
-
-    cache_enabled = property(_get_cache_enabled, _set_cache_enabled)
-
-    def clear_cache(self):
-        """
-        Clears the internal cache.
-        """
-        self._cache.clear()
-        self._cache_egg.clear()
-
-
-    def _yield_distributions(self):
-        """
-        Yield .dist-info and/or .egg(-info) distributions.
-        """
-        # We need to check if we've seen some resources already, because on
-        # some Linux systems (e.g. some Debian/Ubuntu variants) there are
-        # symlinks which alias other files in the environment.
-        seen = set()
-        for path in self.path:
-            finder = resources.finder_for_path(path)
-            if finder is None:
-                continue
-            r = finder.find('')
-            if not r or not r.is_container:
-                continue
-            rset = sorted(r.resources)
-            for entry in rset:
-                r = finder.find(entry)
-                if not r or r.path in seen:
-                    continue
-                if self._include_dist and entry.endswith(DISTINFO_EXT):
-                    possible_filenames = [METADATA_FILENAME,
-                                          WHEEL_METADATA_FILENAME,
-                                          LEGACY_METADATA_FILENAME]
-                    for metadata_filename in possible_filenames:
-                        metadata_path = posixpath.join(entry, metadata_filename)
-                        pydist = finder.find(metadata_path)
-                        if pydist:
-                            break
-                    else:
-                        continue
-
-                    with contextlib.closing(pydist.as_stream()) as stream:
-                        metadata = Metadata(fileobj=stream, scheme='legacy')
-                    logger.debug('Found %s', r.path)
-                    seen.add(r.path)
-                    yield new_dist_class(r.path, metadata=metadata,
-                                         env=self)
-                elif self._include_egg and entry.endswith(('.egg-info',
-                                                          '.egg')):
-                    logger.debug('Found %s', r.path)
-                    seen.add(r.path)
-                    yield old_dist_class(r.path, self)
-
-    def _generate_cache(self):
-        """
-        Scan the path for distributions and populate the cache with
-        those that are found.
-        """
-        gen_dist = not self._cache.generated
-        gen_egg = self._include_egg and not self._cache_egg.generated
-        if gen_dist or gen_egg:
-            for dist in self._yield_distributions():
-                if isinstance(dist, InstalledDistribution):
-                    self._cache.add(dist)
-                else:
-                    self._cache_egg.add(dist)
-
-            if gen_dist:
-                self._cache.generated = True
-            if gen_egg:
-                self._cache_egg.generated = True
-
-    @classmethod
-    def distinfo_dirname(cls, name, version):
-        """
-        The *name* and *version* parameters are converted into their
-        filename-escaped form, i.e. any ``'-'`` characters are replaced
-        with ``'_'`` other than the one in ``'dist-info'`` and the one
-        separating the name from the version number.
-
-        :parameter name: is converted to a standard distribution name by replacing
-                         any runs of non- alphanumeric characters with a single
-                         ``'-'``.
-        :type name: string
-        :parameter version: is converted to a standard version string. Spaces
-                            become dots, and all other non-alphanumeric characters
-                            (except dots) become dashes, with runs of multiple
-                            dashes condensed to a single dash.
-        :type version: string
-        :returns: directory name
-        :rtype: string"""
-        name = name.replace('-', '_')
-        return '-'.join([name, version]) + DISTINFO_EXT
-
-    def get_distributions(self):
-        """
-        Provides an iterator that looks for distributions and returns
-        :class:`InstalledDistribution` or
-        :class:`EggInfoDistribution` instances for each one of them.
-
-        :rtype: iterator of :class:`InstalledDistribution` and
-                :class:`EggInfoDistribution` instances
-        """
-        if not self._cache_enabled:
-            for dist in self._yield_distributions():
-                yield dist
-        else:
-            self._generate_cache()
-
-            for dist in self._cache.path.values():
-                yield dist
-
-            if self._include_egg:
-                for dist in self._cache_egg.path.values():
-                    yield dist
-
-    def get_distribution(self, name):
-        """
-        Looks for a named distribution on the path.
-
-        This function only returns the first result found, as no more than one
-        value is expected. If nothing is found, ``None`` is returned.
-
-        :rtype: :class:`InstalledDistribution`, :class:`EggInfoDistribution`
-                or ``None``
-        """
-        result = None
-        name = name.lower()
-        if not self._cache_enabled:
-            for dist in self._yield_distributions():
-                if dist.key == name:
-                    result = dist
-                    break
-        else:
-            self._generate_cache()
-
-            if name in self._cache.name:
-                result = self._cache.name[name][0]
-            elif self._include_egg and name in self._cache_egg.name:
-                result = self._cache_egg.name[name][0]
-        return result
-
-    def provides_distribution(self, name, version=None):
-        """
-        Iterates over all distributions to find which distributions provide *name*.
-        If a *version* is provided, it will be used to filter the results.
-
-        This function only returns the first result found, since no more than
-        one values are expected. If the directory is not found, returns ``None``.
-
-        :parameter version: a version specifier that indicates the version
-                            required, conforming to the format in ``PEP-345``
-
-        :type name: string
-        :type version: string
-        """
-        matcher = None
-        if version is not None:
-            try:
-                matcher = self._scheme.matcher('%s (%s)' % (name, version))
-            except ValueError:
-                raise DistlibException('invalid name or version: %r, %r' %
-                                      (name, version))
-
-        for dist in self.get_distributions():
-            # We hit a problem on Travis where enum34 was installed and doesn't
-            # have a provides attribute ...
-            if not hasattr(dist, 'provides'):
-                logger.debug('No "provides": %s', dist)
-            else:
-                provided = dist.provides
-
-                for p in provided:
-                    p_name, p_ver = parse_name_and_version(p)
-                    if matcher is None:
-                        if p_name == name:
-                            yield dist
-                            break
-                    else:
-                        if p_name == name and matcher.match(p_ver):
-                            yield dist
-                            break
-
-    def get_file_path(self, name, relative_path):
-        """
-        Return the path to a resource file.
-        """
-        dist = self.get_distribution(name)
-        if dist is None:
-            raise LookupError('no distribution named %r found' % name)
-        return dist.get_resource_path(relative_path)
-
-    def get_exported_entries(self, category, name=None):
-        """
-        Return all of the exported entries in a particular category.
-
-        :param category: The category to search for entries.
-        :param name: If specified, only entries with that name are returned.
-        """
-        for dist in self.get_distributions():
-            r = dist.exports
-            if category in r:
-                d = r[category]
-                if name is not None:
-                    if name in d:
-                        yield d[name]
-                else:
-                    for v in d.values():
-                        yield v
-
-
-class Distribution(object):
-    """
-    A base class for distributions, whether installed or from indexes.
-    Either way, it must have some metadata, so that's all that's needed
-    for construction.
-    """
-
-    build_time_dependency = False
-    """
-    Set to True if it's known to be only a build-time dependency (i.e.
-    not needed after installation).
-    """
-
-    requested = False
-    """A boolean that indicates whether the ``REQUESTED`` metadata file is
-    present (in other words, whether the package was installed by user
-    request or it was installed as a dependency)."""
-
-    def __init__(self, metadata):
-        """
-        Initialise an instance.
-        :param metadata: The instance of :class:`Metadata` describing this
-        distribution.
-        """
-        self.metadata = metadata
-        self.name = metadata.name
-        self.key = self.name.lower()    # for case-insensitive comparisons
-        self.version = metadata.version
-        self.locator = None
-        self.digest = None
-        self.extras = None      # additional features requested
-        self.context = None     # environment marker overrides
-        self.download_urls = set()
-        self.digests = {}
-
-    @property
-    def source_url(self):
-        """
-        The source archive download URL for this distribution.
-        """
-        return self.metadata.source_url
-
-    download_url = source_url   # Backward compatibility
-
-    @property
-    def name_and_version(self):
-        """
-        A utility property which displays the name and version in parentheses.
-        """
-        return '%s (%s)' % (self.name, self.version)
-
-    @property
-    def provides(self):
-        """
-        A set of distribution names and versions provided by this distribution.
-        :return: A set of "name (version)" strings.
-        """
-        plist = self.metadata.provides
-        s = '%s (%s)' % (self.name, self.version)
-        if s not in plist:
-            plist.append(s)
-        return plist
-
-    def _get_requirements(self, req_attr):
-        md = self.metadata
-        logger.debug('Getting requirements from metadata %r', md.todict())
-        reqts = getattr(md, req_attr)
-        return set(md.get_requirements(reqts, extras=self.extras,
-                                       env=self.context))
-
-    @property
-    def run_requires(self):
-        return self._get_requirements('run_requires')
-
-    @property
-    def meta_requires(self):
-        return self._get_requirements('meta_requires')
-
-    @property
-    def build_requires(self):
-        return self._get_requirements('build_requires')
-
-    @property
-    def test_requires(self):
-        return self._get_requirements('test_requires')
-
-    @property
-    def dev_requires(self):
-        return self._get_requirements('dev_requires')
-
-    def matches_requirement(self, req):
-        """
-        Say if this instance matches (fulfills) a requirement.
-        :param req: The requirement to match.
-        :rtype req: str
-        :return: True if it matches, else False.
-        """
-        # Requirement may contain extras - parse to lose those
-        # from what's passed to the matcher
-        r = parse_requirement(req)
-        scheme = get_scheme(self.metadata.scheme)
-        try:
-            matcher = scheme.matcher(r.requirement)
-        except UnsupportedVersionError:
-            # XXX compat-mode if cannot read the version
-            logger.warning('could not read version %r - using name only',
-                           req)
-            name = req.split()[0]
-            matcher = scheme.matcher(name)
-
-        name = matcher.key   # case-insensitive
-
-        result = False
-        for p in self.provides:
-            p_name, p_ver = parse_name_and_version(p)
-            if p_name != name:
-                continue
-            try:
-                result = matcher.match(p_ver)
-                break
-            except UnsupportedVersionError:
-                pass
-        return result
-
-    def __repr__(self):
-        """
-        Return a textual representation of this instance,
-        """
-        if self.source_url:
-            suffix = ' [%s]' % self.source_url
-        else:
-            suffix = ''
-        return '<Distribution %s (%s)%s>' % (self.name, self.version, suffix)
-
-    def __eq__(self, other):
-        """
-        See if this distribution is the same as another.
-        :param other: The distribution to compare with. To be equal to one
-                      another. distributions must have the same type, name,
-                      version and source_url.
-        :return: True if it is the same, else False.
-        """
-        if type(other) is not type(self):
-            result = False
-        else:
-            result = (self.name == other.name and
-                      self.version == other.version and
-                      self.source_url == other.source_url)
-        return result
-
-    def __hash__(self):
-        """
-        Compute hash in a way which matches the equality test.
-        """
-        return hash(self.name) + hash(self.version) + hash(self.source_url)
-
-
-class BaseInstalledDistribution(Distribution):
-    """
-    This is the base class for installed distributions (whether PEP 376 or
-    legacy).
-    """
-
-    hasher = None
-
-    def __init__(self, metadata, path, env=None):
-        """
-        Initialise an instance.
-        :param metadata: An instance of :class:`Metadata` which describes the
-                         distribution. This will normally have been initialised
-                         from a metadata file in the ``path``.
-        :param path:     The path of the ``.dist-info`` or ``.egg-info``
-                         directory for the distribution.
-        :param env:      This is normally the :class:`DistributionPath`
-                         instance where this distribution was found.
-        """
-        super(BaseInstalledDistribution, self).__init__(metadata)
-        self.path = path
-        self.dist_path = env
-
-    def get_hash(self, data, hasher=None):
-        """
-        Get the hash of some data, using a particular hash algorithm, if
-        specified.
-
-        :param data: The data to be hashed.
-        :type data: bytes
-        :param hasher: The name of a hash implementation, supported by hashlib,
-                       or ``None``. Examples of valid values are ``'sha1'``,
-                       ``'sha224'``, ``'sha384'``, '``sha256'``, ``'md5'`` and
-                       ``'sha512'``. If no hasher is specified, the ``hasher``
-                       attribute of the :class:`InstalledDistribution` instance
-                       is used. If the hasher is determined to be ``None``, MD5
-                       is used as the hashing algorithm.
-        :returns: The hash of the data. If a hasher was explicitly specified,
-                  the returned hash will be prefixed with the specified hasher
-                  followed by '='.
-        :rtype: str
-        """
-        if hasher is None:
-            hasher = self.hasher
-        if hasher is None:
-            hasher = hashlib.md5
-            prefix = ''
-        else:
-            hasher = getattr(hashlib, hasher)
-            prefix = '%s=' % self.hasher
-        digest = hasher(data).digest()
-        digest = base64.urlsafe_b64encode(digest).rstrip(b'=').decode('ascii')
-        return '%s%s' % (prefix, digest)
-
-
-class InstalledDistribution(BaseInstalledDistribution):
-    """
-    Created with the *path* of the ``.dist-info`` directory provided to the
-    constructor. It reads the metadata contained in ``pydist.json`` when it is
-    instantiated., or uses a passed in Metadata instance (useful for when
-    dry-run mode is being used).
-    """
-
-    hasher = 'sha256'
-
-    def __init__(self, path, metadata=None, env=None):
-        self.modules = []
-        self.finder = finder = resources.finder_for_path(path)
-        if finder is None:
-            raise ValueError('finder unavailable for %s' % path)
-        if env and env._cache_enabled and path in env._cache.path:
-            metadata = env._cache.path[path].metadata
-        elif metadata is None:
-            r = finder.find(METADATA_FILENAME)
-            # Temporary - for Wheel 0.23 support
-            if r is None:
-                r = finder.find(WHEEL_METADATA_FILENAME)
-            # Temporary - for legacy support
-            if r is None:
-                r = finder.find('METADATA')
-            if r is None:
-                raise ValueError('no %s found in %s' % (METADATA_FILENAME,
-                                                        path))
-            with contextlib.closing(r.as_stream()) as stream:
-                metadata = Metadata(fileobj=stream, scheme='legacy')
-
-        super(InstalledDistribution, self).__init__(metadata, path, env)
-
-        if env and env._cache_enabled:
-            env._cache.add(self)
-
-        r = finder.find('REQUESTED')
-        self.requested = r is not None
-        p  = os.path.join(path, 'top_level.txt')
-        if os.path.exists(p):
-            with open(p, 'rb') as f:
-                data = f.read()
-            self.modules = data.splitlines()
-
-    def __repr__(self):
-        return '<InstalledDistribution %r %s at %r>' % (
-            self.name, self.version, self.path)
-
-    def __str__(self):
-        return "%s %s" % (self.name, self.version)
-
-    def _get_records(self):
-        """
-        Get the list of installed files for the distribution
-        :return: A list of tuples of path, hash and size. Note that hash and
-                 size might be ``None`` for some entries. The path is exactly
-                 as stored in the file (which is as in PEP 376).
-        """
-        results = []
-        r = self.get_distinfo_resource('RECORD')
-        with contextlib.closing(r.as_stream()) as stream:
-            with CSVReader(stream=stream) as record_reader:
-                # Base location is parent dir of .dist-info dir
-                #base_location = os.path.dirname(self.path)
-                #base_location = os.path.abspath(base_location)
-                for row in record_reader:
-                    missing = [None for i in range(len(row), 3)]
-                    path, checksum, size = row + missing
-                    #if not os.path.isabs(path):
-                    #    path = path.replace('/', os.sep)
-                    #    path = os.path.join(base_location, path)
-                    results.append((path, checksum, size))
-        return results
-
-    @cached_property
-    def exports(self):
-        """
-        Return the information exported by this distribution.
-        :return: A dictionary of exports, mapping an export category to a dict
-                 of :class:`ExportEntry` instances describing the individual
-                 export entries, and keyed by name.
-        """
-        result = {}
-        r = self.get_distinfo_resource(EXPORTS_FILENAME)
-        if r:
-            result = self.read_exports()
-        return result
-
-    def read_exports(self):
-        """
-        Read exports data from a file in .ini format.
-
-        :return: A dictionary of exports, mapping an export category to a list
-                 of :class:`ExportEntry` instances describing the individual
-                 export entries.
-        """
-        result = {}
-        r = self.get_distinfo_resource(EXPORTS_FILENAME)
-        if r:
-            with contextlib.closing(r.as_stream()) as stream:
-                result = read_exports(stream)
-        return result
-
-    def write_exports(self, exports):
-        """
-        Write a dictionary of exports to a file in .ini format.
-        :param exports: A dictionary of exports, mapping an export category to
-                        a list of :class:`ExportEntry` instances describing the
-                        individual export entries.
-        """
-        rf = self.get_distinfo_file(EXPORTS_FILENAME)
-        with open(rf, 'w') as f:
-            write_exports(exports, f)
-
-    def get_resource_path(self, relative_path):
-        """
-        NOTE: This API may change in the future.
-
-        Return the absolute path to a resource file with the given relative
-        path.
-
-        :param relative_path: The path, relative to .dist-info, of the resource
-                              of interest.
-        :return: The absolute path where the resource is to be found.
-        """
-        r = self.get_distinfo_resource('RESOURCES')
-        with contextlib.closing(r.as_stream()) as stream:
-            with CSVReader(stream=stream) as resources_reader:
-                for relative, destination in resources_reader:
-                    if relative == relative_path:
-                        return destination
-        raise KeyError('no resource file with relative path %r '
-                       'is installed' % relative_path)
-
-    def list_installed_files(self):
-        """
-        Iterates over the ``RECORD`` entries and returns a tuple
-        ``(path, hash, size)`` for each line.
-
-        :returns: iterator of (path, hash, size)
-        """
-        for result in self._get_records():
-            yield result
-
-    def write_installed_files(self, paths, prefix, dry_run=False):
-        """
-        Writes the ``RECORD`` file, using the ``paths`` iterable passed in. Any
-        existing ``RECORD`` file is silently overwritten.
-
-        prefix is used to determine when to write absolute paths.
-        """
-        prefix = os.path.join(prefix, '')
-        base = os.path.dirname(self.path)
-        base_under_prefix = base.startswith(prefix)
-        base = os.path.join(base, '')
-        record_path = self.get_distinfo_file('RECORD')
-        logger.info('creating %s', record_path)
-        if dry_run:
-            return None
-        with CSVWriter(record_path) as writer:
-            for path in paths:
-                if os.path.isdir(path) or path.endswith(('.pyc', '.pyo')):
-                    # do not put size and hash, as in PEP-376
-                    hash_value = size = ''
-                else:
-                    size = '%d' % os.path.getsize(path)
-                    with open(path, 'rb') as fp:
-                        hash_value = self.get_hash(fp.read())
-                if path.startswith(base) or (base_under_prefix and
-                                             path.startswith(prefix)):
-                    path = os.path.relpath(path, base)
-                writer.writerow((path, hash_value, size))
-
-            # add the RECORD file itself
-            if record_path.startswith(base):
-                record_path = os.path.relpath(record_path, base)
-            writer.writerow((record_path, '', ''))
-        return record_path
-
-    def check_installed_files(self):
-        """
-        Checks that the hashes and sizes of the files in ``RECORD`` are
-        matched by the files themselves. Returns a (possibly empty) list of
-        mismatches. Each entry in the mismatch list will be a tuple consisting
-        of the path, 'exists', 'size' or 'hash' according to what didn't match
-        (existence is checked first, then size, then hash), the expected
-        value and the actual value.
-        """
-        mismatches = []
-        base = os.path.dirname(self.path)
-        record_path = self.get_distinfo_file('RECORD')
-        for path, hash_value, size in self.list_installed_files():
-            if not os.path.isabs(path):
-                path = os.path.join(base, path)
-            if path == record_path:
-                continue
-            if not os.path.exists(path):
-                mismatches.append((path, 'exists', True, False))
-            elif os.path.isfile(path):
-                actual_size = str(os.path.getsize(path))
-                if size and actual_size != size:
-                    mismatches.append((path, 'size', size, actual_size))
-                elif hash_value:
-                    if '=' in hash_value:
-                        hasher = hash_value.split('=', 1)[0]
-                    else:
-                        hasher = None
-
-                    with open(path, 'rb') as f:
-                        actual_hash = self.get_hash(f.read(), hasher)
-                        if actual_hash != hash_value:
-                            mismatches.append((path, 'hash', hash_value, actual_hash))
-        return mismatches
-
-    @cached_property
-    def shared_locations(self):
-        """
-        A dictionary of shared locations whose keys are in the set 'prefix',
-        'purelib', 'platlib', 'scripts', 'headers', 'data' and 'namespace'.
-        The corresponding value is the absolute path of that category for
-        this distribution, and takes into account any paths selected by the
-        user at installation time (e.g. via command-line arguments). In the
-        case of the 'namespace' key, this would be a list of absolute paths
-        for the roots of namespace packages in this distribution.
-
-        The first time this property is accessed, the relevant information is
-        read from the SHARED file in the .dist-info directory.
-        """
-        result = {}
-        shared_path = os.path.join(self.path, 'SHARED')
-        if os.path.isfile(shared_path):
-            with codecs.open(shared_path, 'r', encoding='utf-8') as f:
-                lines = f.read().splitlines()
-            for line in lines:
-                key, value = line.split('=', 1)
-                if key == 'namespace':
-                    result.setdefault(key, []).append(value)
-                else:
-                    result[key] = value
-        return result
-
-    def write_shared_locations(self, paths, dry_run=False):
-        """
-        Write shared location information to the SHARED file in .dist-info.
-        :param paths: A dictionary as described in the documentation for
-        :meth:`shared_locations`.
-        :param dry_run: If True, the action is logged but no file is actually
-                        written.
-        :return: The path of the file written to.
-        """
-        shared_path = os.path.join(self.path, 'SHARED')
-        logger.info('creating %s', shared_path)
-        if dry_run:
-            return None
-        lines = []
-        for key in ('prefix', 'lib', 'headers', 'scripts', 'data'):
-            path = paths[key]
-            if os.path.isdir(paths[key]):
-                lines.append('%s=%s' % (key,  path))
-        for ns in paths.get('namespace', ()):
-            lines.append('namespace=%s' % ns)
-
-        with codecs.open(shared_path, 'w', encoding='utf-8') as f:
-            f.write('\n'.join(lines))
-        return shared_path
-
-    def get_distinfo_resource(self, path):
-        if path not in DIST_FILES:
-            raise DistlibException('invalid path for a dist-info file: '
-                                   '%r at %r' % (path, self.path))
-        finder = resources.finder_for_path(self.path)
-        if finder is None:
-            raise DistlibException('Unable to get a finder for %s' % self.path)
-        return finder.find(path)
-
-    def get_distinfo_file(self, path):
-        """
-        Returns a path located under the ``.dist-info`` directory. Returns a
-        string representing the path.
-
-        :parameter path: a ``'/'``-separated path relative to the
-                         ``.dist-info`` directory or an absolute path;
-                         If *path* is an absolute path and doesn't start
-                         with the ``.dist-info`` directory path,
-                         a :class:`DistlibException` is raised
-        :type path: str
-        :rtype: str
-        """
-        # Check if it is an absolute path  # XXX use relpath, add tests
-        if path.find(os.sep) >= 0:
-            # it's an absolute path?
-            distinfo_dirname, path = path.split(os.sep)[-2:]
-            if distinfo_dirname != self.path.split(os.sep)[-1]:
-                raise DistlibException(
-                    'dist-info file %r does not belong to the %r %s '
-                    'distribution' % (path, self.name, self.version))
-
-        # The file must be relative
-        if path not in DIST_FILES:
-            raise DistlibException('invalid path for a dist-info file: '
-                                   '%r at %r' % (path, self.path))
-
-        return os.path.join(self.path, path)
-
-    def list_distinfo_files(self):
-        """
-        Iterates over the ``RECORD`` entries and returns paths for each line if
-        the path is pointing to a file located in the ``.dist-info`` directory
-        or one of its subdirectories.
-
-        :returns: iterator of paths
-        """
-        base = os.path.dirname(self.path)
-        for path, checksum, size in self._get_records():
-            # XXX add separator or use real relpath algo
-            if not os.path.isabs(path):
-                path = os.path.join(base, path)
-            if path.startswith(self.path):
-                yield path
-
-    def __eq__(self, other):
-        return (isinstance(other, InstalledDistribution) and
-                self.path == other.path)
-
-    # See http://docs.python.org/reference/datamodel#object.__hash__
-    __hash__ = object.__hash__
-
-
-class EggInfoDistribution(BaseInstalledDistribution):
-    """Created with the *path* of the ``.egg-info`` directory or file provided
-    to the constructor. It reads the metadata contained in the file itself, or
-    if the given path happens to be a directory, the metadata is read from the
-    file ``PKG-INFO`` under that directory."""
-
-    requested = True    # as we have no way of knowing, assume it was
-    shared_locations = {}
-
-    def __init__(self, path, env=None):
-        def set_name_and_version(s, n, v):
-            s.name = n
-            s.key = n.lower()   # for case-insensitive comparisons
-            s.version = v
-
-        self.path = path
-        self.dist_path = env
-        if env and env._cache_enabled and path in env._cache_egg.path:
-            metadata = env._cache_egg.path[path].metadata
-            set_name_and_version(self, metadata.name, metadata.version)
-        else:
-            metadata = self._get_metadata(path)
-
-            # Need to be set before caching
-            set_name_and_version(self, metadata.name, metadata.version)
-
-            if env and env._cache_enabled:
-                env._cache_egg.add(self)
-        super(EggInfoDistribution, self).__init__(metadata, path, env)
-
-    def _get_metadata(self, path):
-        requires = None
-
-        def parse_requires_data(data):
-            """Create a list of dependencies from a requires.txt file.
-
-            *data*: the contents of a setuptools-produced requires.txt file.
-            """
-            reqs = []
-            lines = data.splitlines()
-            for line in lines:
-                line = line.strip()
-                if line.startswith('['):
-                    logger.warning('Unexpected line: quitting requirement scan: %r',
-                                   line)
-                    break
-                r = parse_requirement(line)
-                if not r:
-                    logger.warning('Not recognised as a requirement: %r', line)
-                    continue
-                if r.extras:
-                    logger.warning('extra requirements in requires.txt are '
-                                   'not supported')
-                if not r.constraints:
-                    reqs.append(r.name)
-                else:
-                    cons = ', '.join('%s%s' % c for c in r.constraints)
-                    reqs.append('%s (%s)' % (r.name, cons))
-            return reqs
-
-        def parse_requires_path(req_path):
-            """Create a list of dependencies from a requires.txt file.
-
-            *req_path*: the path to a setuptools-produced requires.txt file.
-            """
-
-            reqs = []
-            try:
-                with codecs.open(req_path, 'r', 'utf-8') as fp:
-                    reqs = parse_requires_data(fp.read())
-            except IOError:
-                pass
-            return reqs
-
-        tl_path = tl_data = None
-        if path.endswith('.egg'):
-            if os.path.isdir(path):
-                p = os.path.join(path, 'EGG-INFO')
-                meta_path = os.path.join(p, 'PKG-INFO')
-                metadata = Metadata(path=meta_path, scheme='legacy')
-                req_path = os.path.join(p, 'requires.txt')
-                tl_path = os.path.join(p, 'top_level.txt')
-                requires = parse_requires_path(req_path)
-            else:
-                # FIXME handle the case where zipfile is not available
-                zipf = zipimport.zipimporter(path)
-                fileobj = StringIO(
-                    zipf.get_data('EGG-INFO/PKG-INFO').decode('utf8'))
-                metadata = Metadata(fileobj=fileobj, scheme='legacy')
-                try:
-                    data = zipf.get_data('EGG-INFO/requires.txt')
-                    tl_data = zipf.get_data('EGG-INFO/top_level.txt').decode('utf-8')
-                    requires = parse_requires_data(data.decode('utf-8'))
-                except IOError:
-                    requires = None
-        elif path.endswith('.egg-info'):
-            if os.path.isdir(path):
-                req_path = os.path.join(path, 'requires.txt')
-                requires = parse_requires_path(req_path)
-                path = os.path.join(path, 'PKG-INFO')
-                tl_path = os.path.join(path, 'top_level.txt')
-            metadata = Metadata(path=path, scheme='legacy')
-        else:
-            raise DistlibException('path must end with .egg-info or .egg, '
-                                   'got %r' % path)
-
-        if requires:
-            metadata.add_requirements(requires)
-        # look for top-level modules in top_level.txt, if present
-        if tl_data is None:
-            if tl_path is not None and os.path.exists(tl_path):
-                with open(tl_path, 'rb') as f:
-                    tl_data = f.read().decode('utf-8')
-        if not tl_data:
-            tl_data = []
-        else:
-            tl_data = tl_data.splitlines()
-        self.modules = tl_data
-        return metadata
-
-    def __repr__(self):
-        return '<EggInfoDistribution %r %s at %r>' % (
-            self.name, self.version, self.path)
-
-    def __str__(self):
-        return "%s %s" % (self.name, self.version)
-
-    def check_installed_files(self):
-        """
-        Checks that the hashes and sizes of the files in ``RECORD`` are
-        matched by the files themselves. Returns a (possibly empty) list of
-        mismatches. Each entry in the mismatch list will be a tuple consisting
-        of the path, 'exists', 'size' or 'hash' according to what didn't match
-        (existence is checked first, then size, then hash), the expected
-        value and the actual value.
-        """
-        mismatches = []
-        record_path = os.path.join(self.path, 'installed-files.txt')
-        if os.path.exists(record_path):
-            for path, _, _ in self.list_installed_files():
-                if path == record_path:
-                    continue
-                if not os.path.exists(path):
-                    mismatches.append((path, 'exists', True, False))
-        return mismatches
-
-    def list_installed_files(self):
-        """
-        Iterates over the ``installed-files.txt`` entries and returns a tuple
-        ``(path, hash, size)`` for each line.
-
-        :returns: a list of (path, hash, size)
-        """
-
-        def _md5(path):
-            f = open(path, 'rb')
-            try:
-                content = f.read()
-            finally:
-                f.close()
-            return hashlib.md5(content).hexdigest()
-
-        def _size(path):
-            return os.stat(path).st_size
-
-        record_path = os.path.join(self.path, 'installed-files.txt')
-        result = []
-        if os.path.exists(record_path):
-            with codecs.open(record_path, 'r', encoding='utf-8') as f:
-                for line in f:
-                    line = line.strip()
-                    p = os.path.normpath(os.path.join(self.path, line))
-                    # "./" is present as a marker between installed files
-                    # and installation metadata files
-                    if not os.path.exists(p):
-                        logger.warning('Non-existent file: %s', p)
-                        if p.endswith(('.pyc', '.pyo')):
-                            continue
-                        #otherwise fall through and fail
-                    if not os.path.isdir(p):
-                        result.append((p, _md5(p), _size(p)))
-            result.append((record_path, None, None))
-        return result
-
-    def list_distinfo_files(self, absolute=False):
-        """
-        Iterates over the ``installed-files.txt`` entries and returns paths for
-        each line if the path is pointing to a file located in the
-        ``.egg-info`` directory or one of its subdirectories.
-
-        :parameter absolute: If *absolute* is ``True``, each returned path is
-                          transformed into a local absolute path. Otherwise the
-                          raw value from ``installed-files.txt`` is returned.
-        :type absolute: boolean
-        :returns: iterator of paths
-        """
-        record_path = os.path.join(self.path, 'installed-files.txt')
-        if os.path.exists(record_path):
-            skip = True
-            with codecs.open(record_path, 'r', encoding='utf-8') as f:
-                for line in f:
-                    line = line.strip()
-                    if line == './':
-                        skip = False
-                        continue
-                    if not skip:
-                        p = os.path.normpath(os.path.join(self.path, line))
-                        if p.startswith(self.path):
-                            if absolute:
-                                yield p
-                            else:
-                                yield line
-
-    def __eq__(self, other):
-        return (isinstance(other, EggInfoDistribution) and
-                self.path == other.path)
-
-    # See http://docs.python.org/reference/datamodel#object.__hash__
-    __hash__ = object.__hash__
-
-new_dist_class = InstalledDistribution
-old_dist_class = EggInfoDistribution
-
-
-class DependencyGraph(object):
-    """
-    Represents a dependency graph between distributions.
-
-    The dependency relationships are stored in an ``adjacency_list`` that maps
-    distributions to a list of ``(other, label)`` tuples where  ``other``
-    is a distribution and the edge is labeled with ``label`` (i.e. the version
-    specifier, if such was provided). Also, for more efficient traversal, for
-    every distribution ``x``, a list of predecessors is kept in
-    ``reverse_list[x]``. An edge from distribution ``a`` to
-    distribution ``b`` means that ``a`` depends on ``b``. If any missing
-    dependencies are found, they are stored in ``missing``, which is a
-    dictionary that maps distributions to a list of requirements that were not
-    provided by any other distributions.
-    """
-
-    def __init__(self):
-        self.adjacency_list = {}
-        self.reverse_list = {}
-        self.missing = {}
-
-    def add_distribution(self, distribution):
-        """Add the *distribution* to the graph.
-
-        :type distribution: :class:`distutils2.database.InstalledDistribution`
-                            or :class:`distutils2.database.EggInfoDistribution`
-        """
-        self.adjacency_list[distribution] = []
-        self.reverse_list[distribution] = []
-        #self.missing[distribution] = []
-
-    def add_edge(self, x, y, label=None):
-        """Add an edge from distribution *x* to distribution *y* with the given
-        *label*.
-
-        :type x: :class:`distutils2.database.InstalledDistribution` or
-                 :class:`distutils2.database.EggInfoDistribution`
-        :type y: :class:`distutils2.database.InstalledDistribution` or
-                 :class:`distutils2.database.EggInfoDistribution`
-        :type label: ``str`` or ``None``
-        """
-        self.adjacency_list[x].append((y, label))
-        # multiple edges are allowed, so be careful
-        if x not in self.reverse_list[y]:
-            self.reverse_list[y].append(x)
-
-    def add_missing(self, distribution, requirement):
-        """
-        Add a missing *requirement* for the given *distribution*.
-
-        :type distribution: :class:`distutils2.database.InstalledDistribution`
-                            or :class:`distutils2.database.EggInfoDistribution`
-        :type requirement: ``str``
-        """
-        logger.debug('%s missing %r', distribution, requirement)
-        self.missing.setdefault(distribution, []).append(requirement)
-
-    def _repr_dist(self, dist):
-        return '%s %s' % (dist.name, dist.version)
-
-    def repr_node(self, dist, level=1):
-        """Prints only a subgraph"""
-        output = [self._repr_dist(dist)]
-        for other, label in self.adjacency_list[dist]:
-            dist = self._repr_dist(other)
-            if label is not None:
-                dist = '%s [%s]' % (dist, label)
-            output.append('    ' * level + str(dist))
-            suboutput = self.repr_node(other, level + 1)
-            subs = suboutput.split('\n')
-            output.extend(subs[1:])
-        return '\n'.join(output)
-
-    def to_dot(self, f, skip_disconnected=True):
-        """Writes a DOT output for the graph to the provided file *f*.
-
-        If *skip_disconnected* is set to ``True``, then all distributions
-        that are not dependent on any other distribution are skipped.
-
-        :type f: has to support ``file``-like operations
-        :type skip_disconnected: ``bool``
-        """
-        disconnected = []
-
-        f.write("digraph dependencies {\n")
-        for dist, adjs in self.adjacency_list.items():
-            if len(adjs) == 0 and not skip_disconnected:
-                disconnected.append(dist)
-            for other, label in adjs:
-                if not label is None:
-                    f.write('"%s" -> "%s" [label="%s"]\n' %
-                            (dist.name, other.name, label))
-                else:
-                    f.write('"%s" -> "%s"\n' % (dist.name, other.name))
-        if not skip_disconnected and len(disconnected) > 0:
-            f.write('subgraph disconnected {\n')
-            f.write('label = "Disconnected"\n')
-            f.write('bgcolor = red\n')
-
-            for dist in disconnected:
-                f.write('"%s"' % dist.name)
-                f.write('\n')
-            f.write('}\n')
-        f.write('}\n')
-
-    def topological_sort(self):
-        """
-        Perform a topological sort of the graph.
-        :return: A tuple, the first element of which is a topologically sorted
-                 list of distributions, and the second element of which is a
-                 list of distributions that cannot be sorted because they have
-                 circular dependencies and so form a cycle.
-        """
-        result = []
-        # Make a shallow copy of the adjacency list
-        alist = {}
-        for k, v in self.adjacency_list.items():
-            alist[k] = v[:]
-        while True:
-            # See what we can remove in this run
-            to_remove = []
-            for k, v in list(alist.items())[:]:
-                if not v:
-                    to_remove.append(k)
-                    del alist[k]
-            if not to_remove:
-                # What's left in alist (if anything) is a cycle.
-                break
-            # Remove from the adjacency list of others
-            for k, v in alist.items():
-                alist[k] = [(d, r) for d, r in v if d not in to_remove]
-            logger.debug('Moving to result: %s',
-                         ['%s (%s)' % (d.name, d.version) for d in to_remove])
-            result.extend(to_remove)
-        return result, list(alist.keys())
-
-    def __repr__(self):
-        """Representation of the graph"""
-        output = []
-        for dist, adjs in self.adjacency_list.items():
-            output.append(self.repr_node(dist))
-        return '\n'.join(output)
-
-
-def make_graph(dists, scheme='default'):
-    """Makes a dependency graph from the given distributions.
-
-    :parameter dists: a list of distributions
-    :type dists: list of :class:`distutils2.database.InstalledDistribution` and
-                 :class:`distutils2.database.EggInfoDistribution` instances
-    :rtype: a :class:`DependencyGraph` instance
-    """
-    scheme = get_scheme(scheme)
-    graph = DependencyGraph()
-    provided = {}  # maps names to lists of (version, dist) tuples
-
-    # first, build the graph and find out what's provided
-    for dist in dists:
-        graph.add_distribution(dist)
-
-        for p in dist.provides:
-            name, version = parse_name_and_version(p)
-            logger.debug('Add to provided: %s, %s, %s', name, version, dist)
-            provided.setdefault(name, []).append((version, dist))
-
-    # now make the edges
-    for dist in dists:
-        requires = (dist.run_requires | dist.meta_requires |
-                    dist.build_requires | dist.dev_requires)
-        for req in requires:
-            try:
-                matcher = scheme.matcher(req)
-            except UnsupportedVersionError:
-                # XXX compat-mode if cannot read the version
-                logger.warning('could not read version %r - using name only',
-                               req)
-                name = req.split()[0]
-                matcher = scheme.matcher(name)
-
-            name = matcher.key   # case-insensitive
-
-            matched = False
-            if name in provided:
-                for version, provider in provided[name]:
-                    try:
-                        match = matcher.match(version)
-                    except UnsupportedVersionError:
-                        match = False
-
-                    if match:
-                        graph.add_edge(dist, provider, req)
-                        matched = True
-                        break
-            if not matched:
-                graph.add_missing(dist, req)
-    return graph
-
-
-def get_dependent_dists(dists, dist):
-    """Recursively generate a list of distributions from *dists* that are
-    dependent on *dist*.
-
-    :param dists: a list of distributions
-    :param dist: a distribution, member of *dists* for which we are interested
-    """
-    if dist not in dists:
-        raise DistlibException('given distribution %r is not a member '
-                               'of the list' % dist.name)
-    graph = make_graph(dists)
-
-    dep = [dist]  # dependent distributions
-    todo = graph.reverse_list[dist]  # list of nodes we should inspect
-
-    while todo:
-        d = todo.pop()
-        dep.append(d)
-        for succ in graph.reverse_list[d]:
-            if succ not in dep:
-                todo.append(succ)
-
-    dep.pop(0)  # remove dist from dep, was there to prevent infinite loops
-    return dep
-
-
-def get_required_dists(dists, dist):
-    """Recursively generate a list of distributions from *dists* that are
-    required by *dist*.
-
-    :param dists: a list of distributions
-    :param dist: a distribution, member of *dists* for which we are interested
-    """
-    if dist not in dists:
-        raise DistlibException('given distribution %r is not a member '
-                               'of the list' % dist.name)
-    graph = make_graph(dists)
-
-    req = []  # required distributions
-    todo = graph.adjacency_list[dist]  # list of nodes we should inspect
-
-    while todo:
-        d = todo.pop()[0]
-        req.append(d)
-        for pred in graph.adjacency_list[d]:
-            if pred not in req:
-                todo.append(pred)
-
-    return req
-
-
-def make_dist(name, version, **kwargs):
-    """
-    A convenience method for making a dist given just a name and version.
-    """
-    summary = kwargs.pop('summary', 'Placeholder for summary')
-    md = Metadata(**kwargs)
-    md.name = name
-    md.version = version
-    md.summary = summary or 'Placeholder for summary'
-    return Distribution(md)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/index.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/index.py
deleted file mode 100644
index 2406be2..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/index.py
+++ /dev/null
@@ -1,516 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-# Copyright (C) 2013 Vinay Sajip.
-# Licensed to the Python Software Foundation under a contributor agreement.
-# See LICENSE.txt and CONTRIBUTORS.txt.
-#
-import hashlib
-import logging
-import os
-import shutil
-import subprocess
-import tempfile
-try:
-    from threading import Thread
-except ImportError:
-    from dummy_threading import Thread
-
-from . import DistlibException
-from .compat import (HTTPBasicAuthHandler, Request, HTTPPasswordMgr,
-                     urlparse, build_opener, string_types)
-from .util import cached_property, zip_dir, ServerProxy
-
-logger = logging.getLogger(__name__)
-
-DEFAULT_INDEX = 'https://pypi.python.org/pypi'
-DEFAULT_REALM = 'pypi'
-
-class PackageIndex(object):
-    """
-    This class represents a package index compatible with PyPI, the Python
-    Package Index.
-    """
-
-    boundary = b'----------ThIs_Is_tHe_distlib_index_bouNdaRY_$'
-
-    def __init__(self, url=None):
-        """
-        Initialise an instance.
-
-        :param url: The URL of the index. If not specified, the URL for PyPI is
-                    used.
-        """
-        self.url = url or DEFAULT_INDEX
-        self.read_configuration()
-        scheme, netloc, path, params, query, frag = urlparse(self.url)
-        if params or query or frag or scheme not in ('http', 'https'):
-            raise DistlibException('invalid repository: %s' % self.url)
-        self.password_handler = None
-        self.ssl_verifier = None
-        self.gpg = None
-        self.gpg_home = None
-        with open(os.devnull, 'w') as sink:
-            # Use gpg by default rather than gpg2, as gpg2 insists on
-            # prompting for passwords
-            for s in ('gpg', 'gpg2'):
-                try:
-                    rc = subprocess.check_call([s, '--version'], stdout=sink,
-                                               stderr=sink)
-                    if rc == 0:
-                        self.gpg = s
-                        break
-                except OSError:
-                    pass
-
-    def _get_pypirc_command(self):
-        """
-        Get the distutils command for interacting with PyPI configurations.
-        :return: the command.
-        """
-        from distutils.core import Distribution
-        from distutils.config import PyPIRCCommand
-        d = Distribution()
-        return PyPIRCCommand(d)
-
-    def read_configuration(self):
-        """
-        Read the PyPI access configuration as supported by distutils, getting
-        PyPI to do the actual work. This populates ``username``, ``password``,
-        ``realm`` and ``url`` attributes from the configuration.
-        """
-        # get distutils to do the work
-        c = self._get_pypirc_command()
-        c.repository = self.url
-        cfg = c._read_pypirc()
-        self.username = cfg.get('username')
-        self.password = cfg.get('password')
-        self.realm = cfg.get('realm', 'pypi')
-        self.url = cfg.get('repository', self.url)
-
-    def save_configuration(self):
-        """
-        Save the PyPI access configuration. You must have set ``username`` and
-        ``password`` attributes before calling this method.
-
-        Again, distutils is used to do the actual work.
-        """
-        self.check_credentials()
-        # get distutils to do the work
-        c = self._get_pypirc_command()
-        c._store_pypirc(self.username, self.password)
-
-    def check_credentials(self):
-        """
-        Check that ``username`` and ``password`` have been set, and raise an
-        exception if not.
-        """
-        if self.username is None or self.password is None:
-            raise DistlibException('username and password must be set')
-        pm = HTTPPasswordMgr()
-        _, netloc, _, _, _, _ = urlparse(self.url)
-        pm.add_password(self.realm, netloc, self.username, self.password)
-        self.password_handler = HTTPBasicAuthHandler(pm)
-
-    def register(self, metadata):
-        """
-        Register a distribution on PyPI, using the provided metadata.
-
-        :param metadata: A :class:`Metadata` instance defining at least a name
-                         and version number for the distribution to be
-                         registered.
-        :return: The HTTP response received from PyPI upon submission of the
-                request.
-        """
-        self.check_credentials()
-        metadata.validate()
-        d = metadata.todict()
-        d[':action'] = 'verify'
-        request = self.encode_request(d.items(), [])
-        response = self.send_request(request)
-        d[':action'] = 'submit'
-        request = self.encode_request(d.items(), [])
-        return self.send_request(request)
-
-    def _reader(self, name, stream, outbuf):
-        """
-        Thread runner for reading lines of from a subprocess into a buffer.
-
-        :param name: The logical name of the stream (used for logging only).
-        :param stream: The stream to read from. This will typically a pipe
-                       connected to the output stream of a subprocess.
-        :param outbuf: The list to append the read lines to.
-        """
-        while True:
-            s = stream.readline()
-            if not s:
-                break
-            s = s.decode('utf-8').rstrip()
-            outbuf.append(s)
-            logger.debug('%s: %s' % (name, s))
-        stream.close()
-
-    def get_sign_command(self, filename, signer, sign_password,
-                         keystore=None):
-        """
-        Return a suitable command for signing a file.
-
-        :param filename: The pathname to the file to be signed.
-        :param signer: The identifier of the signer of the file.
-        :param sign_password: The passphrase for the signer's
-                              private key used for signing.
-        :param keystore: The path to a directory which contains the keys
-                         used in verification. If not specified, the
-                         instance's ``gpg_home`` attribute is used instead.
-        :return: The signing command as a list suitable to be
-                 passed to :class:`subprocess.Popen`.
-        """
-        cmd = [self.gpg, '--status-fd', '2', '--no-tty']
-        if keystore is None:
-            keystore = self.gpg_home
-        if keystore:
-            cmd.extend(['--homedir', keystore])
-        if sign_password is not None:
-            cmd.extend(['--batch', '--passphrase-fd', '0'])
-        td = tempfile.mkdtemp()
-        sf = os.path.join(td, os.path.basename(filename) + '.asc')
-        cmd.extend(['--detach-sign', '--armor', '--local-user',
-                    signer, '--output', sf, filename])
-        logger.debug('invoking: %s', ' '.join(cmd))
-        return cmd, sf
-
-    def run_command(self, cmd, input_data=None):
-        """
-        Run a command in a child process , passing it any input data specified.
-
-        :param cmd: The command to run.
-        :param input_data: If specified, this must be a byte string containing
-                           data to be sent to the child process.
-        :return: A tuple consisting of the subprocess' exit code, a list of
-                 lines read from the subprocess' ``stdout``, and a list of
-                 lines read from the subprocess' ``stderr``.
-        """
-        kwargs = {
-            'stdout': subprocess.PIPE,
-            'stderr': subprocess.PIPE,
-        }
-        if input_data is not None:
-            kwargs['stdin'] = subprocess.PIPE
-        stdout = []
-        stderr = []
-        p = subprocess.Popen(cmd, **kwargs)
-        # We don't use communicate() here because we may need to
-        # get clever with interacting with the command
-        t1 = Thread(target=self._reader, args=('stdout', p.stdout, stdout))
-        t1.start()
-        t2 = Thread(target=self._reader, args=('stderr', p.stderr, stderr))
-        t2.start()
-        if input_data is not None:
-            p.stdin.write(input_data)
-            p.stdin.close()
-
-        p.wait()
-        t1.join()
-        t2.join()
-        return p.returncode, stdout, stderr
-
-    def sign_file(self, filename, signer, sign_password, keystore=None):
-        """
-        Sign a file.
-
-        :param filename: The pathname to the file to be signed.
-        :param signer: The identifier of the signer of the file.
-        :param sign_password: The passphrase for the signer's
-                              private key used for signing.
-        :param keystore: The path to a directory which contains the keys
-                         used in signing. If not specified, the instance's
-                         ``gpg_home`` attribute is used instead.
-        :return: The absolute pathname of the file where the signature is
-                 stored.
-        """
-        cmd, sig_file = self.get_sign_command(filename, signer, sign_password,
-                                              keystore)
-        rc, stdout, stderr = self.run_command(cmd,
-                                              sign_password.encode('utf-8'))
-        if rc != 0:
-            raise DistlibException('sign command failed with error '
-                                   'code %s' % rc)
-        return sig_file
-
-    def upload_file(self, metadata, filename, signer=None, sign_password=None,
-                    filetype='sdist', pyversion='source', keystore=None):
-        """
-        Upload a release file to the index.
-
-        :param metadata: A :class:`Metadata` instance defining at least a name
-                         and version number for the file to be uploaded.
-        :param filename: The pathname of the file to be uploaded.
-        :param signer: The identifier of the signer of the file.
-        :param sign_password: The passphrase for the signer's
-                              private key used for signing.
-        :param filetype: The type of the file being uploaded. This is the
-                        distutils command which produced that file, e.g.
-                        ``sdist`` or ``bdist_wheel``.
-        :param pyversion: The version of Python which the release relates
-                          to. For code compatible with any Python, this would
-                          be ``source``, otherwise it would be e.g. ``3.2``.
-        :param keystore: The path to a directory which contains the keys
-                         used in signing. If not specified, the instance's
-                         ``gpg_home`` attribute is used instead.
-        :return: The HTTP response received from PyPI upon submission of the
-                request.
-        """
-        self.check_credentials()
-        if not os.path.exists(filename):
-            raise DistlibException('not found: %s' % filename)
-        metadata.validate()
-        d = metadata.todict()
-        sig_file = None
-        if signer:
-            if not self.gpg:
-                logger.warning('no signing program available - not signed')
-            else:
-                sig_file = self.sign_file(filename, signer, sign_password,
-                                          keystore)
-        with open(filename, 'rb') as f:
-            file_data = f.read()
-        md5_digest = hashlib.md5(file_data).hexdigest()
-        sha256_digest = hashlib.sha256(file_data).hexdigest()
-        d.update({
-            ':action': 'file_upload',
-            'protocol_version': '1',
-            'filetype': filetype,
-            'pyversion': pyversion,
-            'md5_digest': md5_digest,
-            'sha256_digest': sha256_digest,
-        })
-        files = [('content', os.path.basename(filename), file_data)]
-        if sig_file:
-            with open(sig_file, 'rb') as f:
-                sig_data = f.read()
-            files.append(('gpg_signature', os.path.basename(sig_file),
-                         sig_data))
-            shutil.rmtree(os.path.dirname(sig_file))
-        request = self.encode_request(d.items(), files)
-        return self.send_request(request)
-
-    def upload_documentation(self, metadata, doc_dir):
-        """
-        Upload documentation to the index.
-
-        :param metadata: A :class:`Metadata` instance defining at least a name
-                         and version number for the documentation to be
-                         uploaded.
-        :param doc_dir: The pathname of the directory which contains the
-                        documentation. This should be the directory that
-                        contains the ``index.html`` for the documentation.
-        :return: The HTTP response received from PyPI upon submission of the
-                request.
-        """
-        self.check_credentials()
-        if not os.path.isdir(doc_dir):
-            raise DistlibException('not a directory: %r' % doc_dir)
-        fn = os.path.join(doc_dir, 'index.html')
-        if not os.path.exists(fn):
-            raise DistlibException('not found: %r' % fn)
-        metadata.validate()
-        name, version = metadata.name, metadata.version
-        zip_data = zip_dir(doc_dir).getvalue()
-        fields = [(':action', 'doc_upload'),
-                  ('name', name), ('version', version)]
-        files = [('content', name, zip_data)]
-        request = self.encode_request(fields, files)
-        return self.send_request(request)
-
-    def get_verify_command(self, signature_filename, data_filename,
-                           keystore=None):
-        """
-        Return a suitable command for verifying a file.
-
-        :param signature_filename: The pathname to the file containing the
-                                   signature.
-        :param data_filename: The pathname to the file containing the
-                              signed data.
-        :param keystore: The path to a directory which contains the keys
-                         used in verification. If not specified, the
-                         instance's ``gpg_home`` attribute is used instead.
-        :return: The verifying command as a list suitable to be
-                 passed to :class:`subprocess.Popen`.
-        """
-        cmd = [self.gpg, '--status-fd', '2', '--no-tty']
-        if keystore is None:
-            keystore = self.gpg_home
-        if keystore:
-            cmd.extend(['--homedir', keystore])
-        cmd.extend(['--verify', signature_filename, data_filename])
-        logger.debug('invoking: %s', ' '.join(cmd))
-        return cmd
-
-    def verify_signature(self, signature_filename, data_filename,
-                         keystore=None):
-        """
-        Verify a signature for a file.
-
-        :param signature_filename: The pathname to the file containing the
-                                   signature.
-        :param data_filename: The pathname to the file containing the
-                              signed data.
-        :param keystore: The path to a directory which contains the keys
-                         used in verification. If not specified, the
-                         instance's ``gpg_home`` attribute is used instead.
-        :return: True if the signature was verified, else False.
-        """
-        if not self.gpg:
-            raise DistlibException('verification unavailable because gpg '
-                                   'unavailable')
-        cmd = self.get_verify_command(signature_filename, data_filename,
-                                      keystore)
-        rc, stdout, stderr = self.run_command(cmd)
-        if rc not in (0, 1):
-            raise DistlibException('verify command failed with error '
-                             'code %s' % rc)
-        return rc == 0
-
-    def download_file(self, url, destfile, digest=None, reporthook=None):
-        """
-        This is a convenience method for downloading a file from an URL.
-        Normally, this will be a file from the index, though currently
-        no check is made for this (i.e. a file can be downloaded from
-        anywhere).
-
-        The method is just like the :func:`urlretrieve` function in the
-        standard library, except that it allows digest computation to be
-        done during download and checking that the downloaded data
-        matched any expected value.
-
-        :param url: The URL of the file to be downloaded (assumed to be
-                    available via an HTTP GET request).
-        :param destfile: The pathname where the downloaded file is to be
-                         saved.
-        :param digest: If specified, this must be a (hasher, value)
-                       tuple, where hasher is the algorithm used (e.g.
-                       ``'md5'``) and ``value`` is the expected value.
-        :param reporthook: The same as for :func:`urlretrieve` in the
-                           standard library.
-        """
-        if digest is None:
-            digester = None
-            logger.debug('No digest specified')
-        else:
-            if isinstance(digest, (list, tuple)):
-                hasher, digest = digest
-            else:
-                hasher = 'md5'
-            digester = getattr(hashlib, hasher)()
-            logger.debug('Digest specified: %s' % digest)
-        # The following code is equivalent to urlretrieve.
-        # We need to do it this way so that we can compute the
-        # digest of the file as we go.
-        with open(destfile, 'wb') as dfp:
-            # addinfourl is not a context manager on 2.x
-            # so we have to use try/finally
-            sfp = self.send_request(Request(url))
-            try:
-                headers = sfp.info()
-                blocksize = 8192
-                size = -1
-                read = 0
-                blocknum = 0
-                if "content-length" in headers:
-                    size = int(headers["Content-Length"])
-                if reporthook:
-                    reporthook(blocknum, blocksize, size)
-                while True:
-                    block = sfp.read(blocksize)
-                    if not block:
-                        break
-                    read += len(block)
-                    dfp.write(block)
-                    if digester:
-                        digester.update(block)
-                    blocknum += 1
-                    if reporthook:
-                        reporthook(blocknum, blocksize, size)
-            finally:
-                sfp.close()
-
-        # check that we got the whole file, if we can
-        if size >= 0 and read < size:
-            raise DistlibException(
-                'retrieval incomplete: got only %d out of %d bytes'
-                % (read, size))
-        # if we have a digest, it must match.
-        if digester:
-            actual = digester.hexdigest()
-            if digest != actual:
-                raise DistlibException('%s digest mismatch for %s: expected '
-                                       '%s, got %s' % (hasher, destfile,
-                                                       digest, actual))
-            logger.debug('Digest verified: %s', digest)
-
-    def send_request(self, req):
-        """
-        Send a standard library :class:`Request` to PyPI and return its
-        response.
-
-        :param req: The request to send.
-        :return: The HTTP response from PyPI (a standard library HTTPResponse).
-        """
-        handlers = []
-        if self.password_handler:
-            handlers.append(self.password_handler)
-        if self.ssl_verifier:
-            handlers.append(self.ssl_verifier)
-        opener = build_opener(*handlers)
-        return opener.open(req)
-
-    def encode_request(self, fields, files):
-        """
-        Encode fields and files for posting to an HTTP server.
-
-        :param fields: The fields to send as a list of (fieldname, value)
-                       tuples.
-        :param files: The files to send as a list of (fieldname, filename,
-                      file_bytes) tuple.
-        """
-        # Adapted from packaging, which in turn was adapted from
-        # http://code.activestate.com/recipes/146306
-
-        parts = []
-        boundary = self.boundary
-        for k, values in fields:
-            if not isinstance(values, (list, tuple)):
-                values = [values]
-
-            for v in values:
-                parts.extend((
-                    b'--' + boundary,
-                    ('Content-Disposition: form-data; name="%s"' %
-                     k).encode('utf-8'),
-                    b'',
-                    v.encode('utf-8')))
-        for key, filename, value in files:
-            parts.extend((
-                b'--' + boundary,
-                ('Content-Disposition: form-data; name="%s"; filename="%s"' %
-                 (key, filename)).encode('utf-8'),
-                b'',
-                value))
-
-        parts.extend((b'--' + boundary + b'--', b''))
-
-        body = b'\r\n'.join(parts)
-        ct = b'multipart/form-data; boundary=' + boundary
-        headers = {
-            'Content-type': ct,
-            'Content-length': str(len(body))
-        }
-        return Request(self.url, body, headers)
-
-    def search(self, terms, operator=None):
-        if isinstance(terms, string_types):
-            terms = {'name': terms}
-        rpc_proxy = ServerProxy(self.url, timeout=3.0)
-        try:
-            return rpc_proxy.search(terms, operator or 'and')
-        finally:
-            rpc_proxy('close')()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/locators.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/locators.py
deleted file mode 100644
index 5c655c3..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/locators.py
+++ /dev/null
@@ -1,1295 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-# Copyright (C) 2012-2015 Vinay Sajip.
-# Licensed to the Python Software Foundation under a contributor agreement.
-# See LICENSE.txt and CONTRIBUTORS.txt.
-#
-
-import gzip
-from io import BytesIO
-import json
-import logging
-import os
-import posixpath
-import re
-try:
-    import threading
-except ImportError:  # pragma: no cover
-    import dummy_threading as threading
-import zlib
-
-from . import DistlibException
-from .compat import (urljoin, urlparse, urlunparse, url2pathname, pathname2url,
-                     queue, quote, unescape, string_types, build_opener,
-                     HTTPRedirectHandler as BaseRedirectHandler, text_type,
-                     Request, HTTPError, URLError)
-from .database import Distribution, DistributionPath, make_dist
-from .metadata import Metadata, MetadataInvalidError
-from .util import (cached_property, parse_credentials, ensure_slash,
-                   split_filename, get_project_data, parse_requirement,
-                   parse_name_and_version, ServerProxy, normalize_name)
-from .version import get_scheme, UnsupportedVersionError
-from .wheel import Wheel, is_compatible
-
-logger = logging.getLogger(__name__)
-
-HASHER_HASH = re.compile(r'^(\w+)=([a-f0-9]+)')
-CHARSET = re.compile(r';\s*charset\s*=\s*(.*)\s*$', re.I)
-HTML_CONTENT_TYPE = re.compile('text/html|application/x(ht)?ml')
-DEFAULT_INDEX = 'https://pypi.python.org/pypi'
-
-def get_all_distribution_names(url=None):
-    """
-    Return all distribution names known by an index.
-    :param url: The URL of the index.
-    :return: A list of all known distribution names.
-    """
-    if url is None:
-        url = DEFAULT_INDEX
-    client = ServerProxy(url, timeout=3.0)
-    try:
-        return client.list_packages()
-    finally:
-        client('close')()
-
-class RedirectHandler(BaseRedirectHandler):
-    """
-    A class to work around a bug in some Python 3.2.x releases.
-    """
-    # There's a bug in the base version for some 3.2.x
-    # (e.g. 3.2.2 on Ubuntu Oneiric). If a Location header
-    # returns e.g. /abc, it bails because it says the scheme ''
-    # is bogus, when actually it should use the request's
-    # URL for the scheme. See Python issue #13696.
-    def http_error_302(self, req, fp, code, msg, headers):
-        # Some servers (incorrectly) return multiple Location headers
-        # (so probably same goes for URI).  Use first header.
-        newurl = None
-        for key in ('location', 'uri'):
-            if key in headers:
-                newurl = headers[key]
-                break
-        if newurl is None:  # pragma: no cover
-            return
-        urlparts = urlparse(newurl)
-        if urlparts.scheme == '':
-            newurl = urljoin(req.get_full_url(), newurl)
-            if hasattr(headers, 'replace_header'):
-                headers.replace_header(key, newurl)
-            else:
-                headers[key] = newurl
-        return BaseRedirectHandler.http_error_302(self, req, fp, code, msg,
-                                                  headers)
-
-    http_error_301 = http_error_303 = http_error_307 = http_error_302
-
-class Locator(object):
-    """
-    A base class for locators - things that locate distributions.
-    """
-    source_extensions = ('.tar.gz', '.tar.bz2', '.tar', '.zip', '.tgz', '.tbz')
-    binary_extensions = ('.egg', '.exe', '.whl')
-    excluded_extensions = ('.pdf',)
-
-    # A list of tags indicating which wheels you want to match. The default
-    # value of None matches against the tags compatible with the running
-    # Python. If you want to match other values, set wheel_tags on a locator
-    # instance to a list of tuples (pyver, abi, arch) which you want to match.
-    wheel_tags = None
-
-    downloadable_extensions = source_extensions + ('.whl',)
-
-    def __init__(self, scheme='default'):
-        """
-        Initialise an instance.
-        :param scheme: Because locators look for most recent versions, they
-                       need to know the version scheme to use. This specifies
-                       the current PEP-recommended scheme - use ``'legacy'``
-                       if you need to support existing distributions on PyPI.
-        """
-        self._cache = {}
-        self.scheme = scheme
-        # Because of bugs in some of the handlers on some of the platforms,
-        # we use our own opener rather than just using urlopen.
-        self.opener = build_opener(RedirectHandler())
-        # If get_project() is called from locate(), the matcher instance
-        # is set from the requirement passed to locate(). See issue #18 for
-        # why this can be useful to know.
-        self.matcher = None
-        self.errors = queue.Queue()
-
-    def get_errors(self):
-        """
-        Return any errors which have occurred.
-        """
-        result = []
-        while not self.errors.empty():  # pragma: no cover
-            try:
-                e = self.errors.get(False)
-                result.append(e)
-            except self.errors.Empty:
-                continue
-            self.errors.task_done()
-        return result
-
-    def clear_errors(self):
-        """
-        Clear any errors which may have been logged.
-        """
-        # Just get the errors and throw them away
-        self.get_errors()
-
-    def clear_cache(self):
-        self._cache.clear()
-
-    def _get_scheme(self):
-        return self._scheme
-
-    def _set_scheme(self, value):
-        self._scheme = value
-
-    scheme = property(_get_scheme, _set_scheme)
-
-    def _get_project(self, name):
-        """
-        For a given project, get a dictionary mapping available versions to Distribution
-        instances.
-
-        This should be implemented in subclasses.
-
-        If called from a locate() request, self.matcher will be set to a
-        matcher for the requirement to satisfy, otherwise it will be None.
-        """
-        raise NotImplementedError('Please implement in the subclass')
-
-    def get_distribution_names(self):
-        """
-        Return all the distribution names known to this locator.
-        """
-        raise NotImplementedError('Please implement in the subclass')
-
-    def get_project(self, name):
-        """
-        For a given project, get a dictionary mapping available versions to Distribution
-        instances.
-
-        This calls _get_project to do all the work, and just implements a caching layer on top.
-        """
-        if self._cache is None:  # pragma: no cover
-            result = self._get_project(name)
-        elif name in self._cache:
-            result = self._cache[name]
-        else:
-            self.clear_errors()
-            result = self._get_project(name)
-            self._cache[name] = result
-        return result
-
-    def score_url(self, url):
-        """
-        Give an url a score which can be used to choose preferred URLs
-        for a given project release.
-        """
-        t = urlparse(url)
-        basename = posixpath.basename(t.path)
-        compatible = True
-        is_wheel = basename.endswith('.whl')
-        is_downloadable = basename.endswith(self.downloadable_extensions)
-        if is_wheel:
-            compatible = is_compatible(Wheel(basename), self.wheel_tags)
-        return (t.scheme == 'https', 'pypi.python.org' in t.netloc,
-                is_downloadable, is_wheel, compatible, basename)
-
-    def prefer_url(self, url1, url2):
-        """
-        Choose one of two URLs where both are candidates for distribution
-        archives for the same version of a distribution (for example,
-        .tar.gz vs. zip).
-
-        The current implementation favours https:// URLs over http://, archives
-        from PyPI over those from other locations, wheel compatibility (if a
-        wheel) and then the archive name.
-        """
-        result = url2
-        if url1:
-            s1 = self.score_url(url1)
-            s2 = self.score_url(url2)
-            if s1 > s2:
-                result = url1
-            if result != url2:
-                logger.debug('Not replacing %r with %r', url1, url2)
-            else:
-                logger.debug('Replacing %r with %r', url1, url2)
-        return result
-
-    def split_filename(self, filename, project_name):
-        """
-        Attempt to split a filename in project name, version and Python version.
-        """
-        return split_filename(filename, project_name)
-
-    def convert_url_to_download_info(self, url, project_name):
-        """
-        See if a URL is a candidate for a download URL for a project (the URL
-        has typically been scraped from an HTML page).
-
-        If it is, a dictionary is returned with keys "name", "version",
-        "filename" and "url"; otherwise, None is returned.
-        """
-        def same_project(name1, name2):
-            return normalize_name(name1) == normalize_name(name2)
-
-        result = None
-        scheme, netloc, path, params, query, frag = urlparse(url)
-        if frag.lower().startswith('egg='):  # pragma: no cover
-            logger.debug('%s: version hint in fragment: %r',
-                         project_name, frag)
-        m = HASHER_HASH.match(frag)
-        if m:
-            algo, digest = m.groups()
-        else:
-            algo, digest = None, None
-        origpath = path
-        if path and path[-1] == '/':  # pragma: no cover
-            path = path[:-1]
-        if path.endswith('.whl'):
-            try:
-                wheel = Wheel(path)
-                if not is_compatible(wheel, self.wheel_tags):
-                    logger.debug('Wheel not compatible: %s', path)
-                else:
-                    if project_name is None:
-                        include = True
-                    else:
-                        include = same_project(wheel.name, project_name)
-                    if include:
-                        result = {
-                            'name': wheel.name,
-                            'version': wheel.version,
-                            'filename': wheel.filename,
-                            'url': urlunparse((scheme, netloc, origpath,
-                                               params, query, '')),
-                            'python-version': ', '.join(
-                                ['.'.join(list(v[2:])) for v in wheel.pyver]),
-                        }
-            except Exception as e:  # pragma: no cover
-                logger.warning('invalid path for wheel: %s', path)
-        elif not path.endswith(self.downloadable_extensions):  # pragma: no cover
-            logger.debug('Not downloadable: %s', path)
-        else:  # downloadable extension
-            path = filename = posixpath.basename(path)
-            for ext in self.downloadable_extensions:
-                if path.endswith(ext):
-                    path = path[:-len(ext)]
-                    t = self.split_filename(path, project_name)
-                    if not t:  # pragma: no cover
-                        logger.debug('No match for project/version: %s', path)
-                    else:
-                        name, version, pyver = t
-                        if not project_name or same_project(project_name, name):
-                            result = {
-                                'name': name,
-                                'version': version,
-                                'filename': filename,
-                                'url': urlunparse((scheme, netloc, origpath,
-                                                   params, query, '')),
-                                #'packagetype': 'sdist',
-                            }
-                            if pyver:  # pragma: no cover
-                                result['python-version'] = pyver
-                    break
-        if result and algo:
-            result['%s_digest' % algo] = digest
-        return result
-
-    def _get_digest(self, info):
-        """
-        Get a digest from a dictionary by looking at keys of the form
-        'algo_digest'.
-
-        Returns a 2-tuple (algo, digest) if found, else None. Currently
-        looks only for SHA256, then MD5.
-        """
-        result = None
-        for algo in ('sha256', 'md5'):
-            key = '%s_digest' % algo
-            if key in info:
-                result = (algo, info[key])
-                break
-        return result
-
-    def _update_version_data(self, result, info):
-        """
-        Update a result dictionary (the final result from _get_project) with a
-        dictionary for a specific version, which typically holds information
-        gleaned from a filename or URL for an archive for the distribution.
-        """
-        name = info.pop('name')
-        version = info.pop('version')
-        if version in result:
-            dist = result[version]
-            md = dist.metadata
-        else:
-            dist = make_dist(name, version, scheme=self.scheme)
-            md = dist.metadata
-        dist.digest = digest = self._get_digest(info)
-        url = info['url']
-        result['digests'][url] = digest
-        if md.source_url != info['url']:
-            md.source_url = self.prefer_url(md.source_url, url)
-            result['urls'].setdefault(version, set()).add(url)
-        dist.locator = self
-        result[version] = dist
-
-    def locate(self, requirement, prereleases=False):
-        """
-        Find the most recent distribution which matches the given
-        requirement.
-
-        :param requirement: A requirement of the form 'foo (1.0)' or perhaps
-                            'foo (>= 1.0, < 2.0, != 1.3)'
-        :param prereleases: If ``True``, allow pre-release versions
-                            to be located. Otherwise, pre-release versions
-                            are not returned.
-        :return: A :class:`Distribution` instance, or ``None`` if no such
-                 distribution could be located.
-        """
-        result = None
-        r = parse_requirement(requirement)
-        if r is None:  # pragma: no cover
-            raise DistlibException('Not a valid requirement: %r' % requirement)
-        scheme = get_scheme(self.scheme)
-        self.matcher = matcher = scheme.matcher(r.requirement)
-        logger.debug('matcher: %s (%s)', matcher, type(matcher).__name__)
-        versions = self.get_project(r.name)
-        if len(versions) > 2:   # urls and digests keys are present
-            # sometimes, versions are invalid
-            slist = []
-            vcls = matcher.version_class
-            for k in versions:
-                if k in ('urls', 'digests'):
-                    continue
-                try:
-                    if not matcher.match(k):
-                        logger.debug('%s did not match %r', matcher, k)
-                    else:
-                        if prereleases or not vcls(k).is_prerelease:
-                            slist.append(k)
-                        else:
-                            logger.debug('skipping pre-release '
-                                         'version %s of %s', k, matcher.name)
-                except Exception:  # pragma: no cover
-                    logger.warning('error matching %s with %r', matcher, k)
-                    pass # slist.append(k)
-            if len(slist) > 1:
-                slist = sorted(slist, key=scheme.key)
-            if slist:
-                logger.debug('sorted list: %s', slist)
-                version = slist[-1]
-                result = versions[version]
-        if result:
-            if r.extras:
-                result.extras = r.extras
-            result.download_urls = versions.get('urls', {}).get(version, set())
-            d = {}
-            sd = versions.get('digests', {})
-            for url in result.download_urls:
-                if url in sd:  # pragma: no cover
-                    d[url] = sd[url]
-            result.digests = d
-        self.matcher = None
-        return result
-
-
-class PyPIRPCLocator(Locator):
-    """
-    This locator uses XML-RPC to locate distributions. It therefore
-    cannot be used with simple mirrors (that only mirror file content).
-    """
-    def __init__(self, url, **kwargs):
-        """
-        Initialise an instance.
-
-        :param url: The URL to use for XML-RPC.
-        :param kwargs: Passed to the superclass constructor.
-        """
-        super(PyPIRPCLocator, self).__init__(**kwargs)
-        self.base_url = url
-        self.client = ServerProxy(url, timeout=3.0)
-
-    def get_distribution_names(self):
-        """
-        Return all the distribution names known to this locator.
-        """
-        return set(self.client.list_packages())
-
-    def _get_project(self, name):
-        result = {'urls': {}, 'digests': {}}
-        versions = self.client.package_releases(name, True)
-        for v in versions:
-            urls = self.client.release_urls(name, v)
-            data = self.client.release_data(name, v)
-            metadata = Metadata(scheme=self.scheme)
-            metadata.name = data['name']
-            metadata.version = data['version']
-            metadata.license = data.get('license')
-            metadata.keywords = data.get('keywords', [])
-            metadata.summary = data.get('summary')
-            dist = Distribution(metadata)
-            if urls:
-                info = urls[0]
-                metadata.source_url = info['url']
-                dist.digest = self._get_digest(info)
-                dist.locator = self
-                result[v] = dist
-                for info in urls:
-                    url = info['url']
-                    digest = self._get_digest(info)
-                    result['urls'].setdefault(v, set()).add(url)
-                    result['digests'][url] = digest
-        return result
-
-class PyPIJSONLocator(Locator):
-    """
-    This locator uses PyPI's JSON interface. It's very limited in functionality
-    and probably not worth using.
-    """
-    def __init__(self, url, **kwargs):
-        super(PyPIJSONLocator, self).__init__(**kwargs)
-        self.base_url = ensure_slash(url)
-
-    def get_distribution_names(self):
-        """
-        Return all the distribution names known to this locator.
-        """
-        raise NotImplementedError('Not available from this locator')
-
-    def _get_project(self, name):
-        result = {'urls': {}, 'digests': {}}
-        url = urljoin(self.base_url, '%s/json' % quote(name))
-        try:
-            resp = self.opener.open(url)
-            data = resp.read().decode() # for now
-            d = json.loads(data)
-            md = Metadata(scheme=self.scheme)
-            data = d['info']
-            md.name = data['name']
-            md.version = data['version']
-            md.license = data.get('license')
-            md.keywords = data.get('keywords', [])
-            md.summary = data.get('summary')
-            dist = Distribution(md)
-            dist.locator = self
-            urls = d['urls']
-            result[md.version] = dist
-            for info in d['urls']:
-                url = info['url']
-                dist.download_urls.add(url)
-                dist.digests[url] = self._get_digest(info)
-                result['urls'].setdefault(md.version, set()).add(url)
-                result['digests'][url] = self._get_digest(info)
-            # Now get other releases
-            for version, infos in d['releases'].items():
-                if version == md.version:
-                    continue    # already done
-                omd = Metadata(scheme=self.scheme)
-                omd.name = md.name
-                omd.version = version
-                odist = Distribution(omd)
-                odist.locator = self
-                result[version] = odist
-                for info in infos:
-                    url = info['url']
-                    odist.download_urls.add(url)
-                    odist.digests[url] = self._get_digest(info)
-                    result['urls'].setdefault(version, set()).add(url)
-                    result['digests'][url] = self._get_digest(info)
-#            for info in urls:
-#                md.source_url = info['url']
-#                dist.digest = self._get_digest(info)
-#                dist.locator = self
-#                for info in urls:
-#                    url = info['url']
-#                    result['urls'].setdefault(md.version, set()).add(url)
-#                    result['digests'][url] = self._get_digest(info)
-        except Exception as e:
-            self.errors.put(text_type(e))
-            logger.exception('JSON fetch failed: %s', e)
-        return result
-
-
-class Page(object):
-    """
-    This class represents a scraped HTML page.
-    """
-    # The following slightly hairy-looking regex just looks for the contents of
-    # an anchor link, which has an attribute "href" either immediately preceded
-    # or immediately followed by a "rel" attribute. The attribute values can be
-    # declared with double quotes, single quotes or no quotes - which leads to
-    # the length of the expression.
-    _href = re.compile("""
-(rel\\s*=\\s*(?:"(?P<rel1>[^"]*)"|'(?P<rel2>[^']*)'|(?P<rel3>[^>\\s\n]*))\\s+)?
-href\\s*=\\s*(?:"(?P<url1>[^"]*)"|'(?P<url2>[^']*)'|(?P<url3>[^>\\s\n]*))
-(\\s+rel\\s*=\\s*(?:"(?P<rel4>[^"]*)"|'(?P<rel5>[^']*)'|(?P<rel6>[^>\\s\n]*)))?
-""", re.I | re.S | re.X)
-    _base = re.compile(r"""<base\s+href\s*=\s*['"]?([^'">]+)""", re.I | re.S)
-
-    def __init__(self, data, url):
-        """
-        Initialise an instance with the Unicode page contents and the URL they
-        came from.
-        """
-        self.data = data
-        self.base_url = self.url = url
-        m = self._base.search(self.data)
-        if m:
-            self.base_url = m.group(1)
-
-    _clean_re = re.compile(r'[^a-z0-9$&+,/:;=?@.#%_\\|-]', re.I)
-
-    @cached_property
-    def links(self):
-        """
-        Return the URLs of all the links on a page together with information
-        about their "rel" attribute, for determining which ones to treat as
-        downloads and which ones to queue for further scraping.
-        """
-        def clean(url):
-            "Tidy up an URL."
-            scheme, netloc, path, params, query, frag = urlparse(url)
-            return urlunparse((scheme, netloc, quote(path),
-                               params, query, frag))
-
-        result = set()
-        for match in self._href.finditer(self.data):
-            d = match.groupdict('')
-            rel = (d['rel1'] or d['rel2'] or d['rel3'] or
-                   d['rel4'] or d['rel5'] or d['rel6'])
-            url = d['url1'] or d['url2'] or d['url3']
-            url = urljoin(self.base_url, url)
-            url = unescape(url)
-            url = self._clean_re.sub(lambda m: '%%%2x' % ord(m.group(0)), url)
-            result.add((url, rel))
-        # We sort the result, hoping to bring the most recent versions
-        # to the front
-        result = sorted(result, key=lambda t: t[0], reverse=True)
-        return result
-
-
-class SimpleScrapingLocator(Locator):
-    """
-    A locator which scrapes HTML pages to locate downloads for a distribution.
-    This runs multiple threads to do the I/O; performance is at least as good
-    as pip's PackageFinder, which works in an analogous fashion.
-    """
-
-    # These are used to deal with various Content-Encoding schemes.
-    decoders = {
-        'deflate': zlib.decompress,
-        'gzip': lambda b: gzip.GzipFile(fileobj=BytesIO(d)).read(),
-        'none': lambda b: b,
-    }
-
-    def __init__(self, url, timeout=None, num_workers=10, **kwargs):
-        """
-        Initialise an instance.
-        :param url: The root URL to use for scraping.
-        :param timeout: The timeout, in seconds, to be applied to requests.
-                        This defaults to ``None`` (no timeout specified).
-        :param num_workers: The number of worker threads you want to do I/O,
-                            This defaults to 10.
-        :param kwargs: Passed to the superclass.
-        """
-        super(SimpleScrapingLocator, self).__init__(**kwargs)
-        self.base_url = ensure_slash(url)
-        self.timeout = timeout
-        self._page_cache = {}
-        self._seen = set()
-        self._to_fetch = queue.Queue()
-        self._bad_hosts = set()
-        self.skip_externals = False
-        self.num_workers = num_workers
-        self._lock = threading.RLock()
-        # See issue #45: we need to be resilient when the locator is used
-        # in a thread, e.g. with concurrent.futures. We can't use self._lock
-        # as it is for coordinating our internal threads - the ones created
-        # in _prepare_threads.
-        self._gplock = threading.RLock()
-        self.platform_check = False  # See issue #112
-
-    def _prepare_threads(self):
-        """
-        Threads are created only when get_project is called, and terminate
-        before it returns. They are there primarily to parallelise I/O (i.e.
-        fetching web pages).
-        """
-        self._threads = []
-        for i in range(self.num_workers):
-            t = threading.Thread(target=self._fetch)
-            t.setDaemon(True)
-            t.start()
-            self._threads.append(t)
-
-    def _wait_threads(self):
-        """
-        Tell all the threads to terminate (by sending a sentinel value) and
-        wait for them to do so.
-        """
-        # Note that you need two loops, since you can't say which
-        # thread will get each sentinel
-        for t in self._threads:
-            self._to_fetch.put(None)    # sentinel
-        for t in self._threads:
-            t.join()
-        self._threads = []
-
-    def _get_project(self, name):
-        result = {'urls': {}, 'digests': {}}
-        with self._gplock:
-            self.result = result
-            self.project_name = name
-            url = urljoin(self.base_url, '%s/' % quote(name))
-            self._seen.clear()
-            self._page_cache.clear()
-            self._prepare_threads()
-            try:
-                logger.debug('Queueing %s', url)
-                self._to_fetch.put(url)
-                self._to_fetch.join()
-            finally:
-                self._wait_threads()
-            del self.result
-        return result
-
-    platform_dependent = re.compile(r'\b(linux_(i\d86|x86_64|arm\w+)|'
-                                    r'win(32|_amd64)|macosx_?\d+)\b', re.I)
-
-    def _is_platform_dependent(self, url):
-        """
-        Does an URL refer to a platform-specific download?
-        """
-        return self.platform_dependent.search(url)
-
-    def _process_download(self, url):
-        """
-        See if an URL is a suitable download for a project.
-
-        If it is, register information in the result dictionary (for
-        _get_project) about the specific version it's for.
-
-        Note that the return value isn't actually used other than as a boolean
-        value.
-        """
-        if self.platform_check and self._is_platform_dependent(url):
-            info = None
-        else:
-            info = self.convert_url_to_download_info(url, self.project_name)
-        logger.debug('process_download: %s -> %s', url, info)
-        if info:
-            with self._lock:    # needed because self.result is shared
-                self._update_version_data(self.result, info)
-        return info
-
-    def _should_queue(self, link, referrer, rel):
-        """
-        Determine whether a link URL from a referring page and with a
-        particular "rel" attribute should be queued for scraping.
-        """
-        scheme, netloc, path, _, _, _ = urlparse(link)
-        if path.endswith(self.source_extensions + self.binary_extensions +
-                         self.excluded_extensions):
-            result = False
-        elif self.skip_externals and not link.startswith(self.base_url):
-            result = False
-        elif not referrer.startswith(self.base_url):
-            result = False
-        elif rel not in ('homepage', 'download'):
-            result = False
-        elif scheme not in ('http', 'https', 'ftp'):
-            result = False
-        elif self._is_platform_dependent(link):
-            result = False
-        else:
-            host = netloc.split(':', 1)[0]
-            if host.lower() == 'localhost':
-                result = False
-            else:
-                result = True
-        logger.debug('should_queue: %s (%s) from %s -> %s', link, rel,
-                     referrer, result)
-        return result
-
-    def _fetch(self):
-        """
-        Get a URL to fetch from the work queue, get the HTML page, examine its
-        links for download candidates and candidates for further scraping.
-
-        This is a handy method to run in a thread.
-        """
-        while True:
-            url = self._to_fetch.get()
-            try:
-                if url:
-                    page = self.get_page(url)
-                    if page is None:    # e.g. after an error
-                        continue
-                    for link, rel in page.links:
-                        if link not in self._seen:
-                            try:
-                                self._seen.add(link)
-                                if (not self._process_download(link) and
-                                    self._should_queue(link, url, rel)):
-                                    logger.debug('Queueing %s from %s', link, url)
-                                    self._to_fetch.put(link)
-                            except MetadataInvalidError:  # e.g. invalid versions
-                                pass
-            except Exception as e:  # pragma: no cover
-                self.errors.put(text_type(e))
-            finally:
-                # always do this, to avoid hangs :-)
-                self._to_fetch.task_done()
-            if not url:
-                #logger.debug('Sentinel seen, quitting.')
-                break
-
-    def get_page(self, url):
-        """
-        Get the HTML for an URL, possibly from an in-memory cache.
-
-        XXX TODO Note: this cache is never actually cleared. It's assumed that
-        the data won't get stale over the lifetime of a locator instance (not
-        necessarily true for the default_locator).
-        """
-        # http://peak.telecommunity.com/DevCenter/EasyInstall#package-index-api
-        scheme, netloc, path, _, _, _ = urlparse(url)
-        if scheme == 'file' and os.path.isdir(url2pathname(path)):
-            url = urljoin(ensure_slash(url), 'index.html')
-
-        if url in self._page_cache:
-            result = self._page_cache[url]
-            logger.debug('Returning %s from cache: %s', url, result)
-        else:
-            host = netloc.split(':', 1)[0]
-            result = None
-            if host in self._bad_hosts:
-                logger.debug('Skipping %s due to bad host %s', url, host)
-            else:
-                req = Request(url, headers={'Accept-encoding': 'identity'})
-                try:
-                    logger.debug('Fetching %s', url)
-                    resp = self.opener.open(req, timeout=self.timeout)
-                    logger.debug('Fetched %s', url)
-                    headers = resp.info()
-                    content_type = headers.get('Content-Type', '')
-                    if HTML_CONTENT_TYPE.match(content_type):
-                        final_url = resp.geturl()
-                        data = resp.read()
-                        encoding = headers.get('Content-Encoding')
-                        if encoding:
-                            decoder = self.decoders[encoding]   # fail if not found
-                            data = decoder(data)
-                        encoding = 'utf-8'
-                        m = CHARSET.search(content_type)
-                        if m:
-                            encoding = m.group(1)
-                        try:
-                            data = data.decode(encoding)
-                        except UnicodeError:  # pragma: no cover
-                            data = data.decode('latin-1')    # fallback
-                        result = Page(data, final_url)
-                        self._page_cache[final_url] = result
-                except HTTPError as e:
-                    if e.code != 404:
-                        logger.exception('Fetch failed: %s: %s', url, e)
-                except URLError as e:  # pragma: no cover
-                    logger.exception('Fetch failed: %s: %s', url, e)
-                    with self._lock:
-                        self._bad_hosts.add(host)
-                except Exception as e:  # pragma: no cover
-                    logger.exception('Fetch failed: %s: %s', url, e)
-                finally:
-                    self._page_cache[url] = result   # even if None (failure)
-        return result
-
-    _distname_re = re.compile('<a href=[^>]*>([^<]+)<')
-
-    def get_distribution_names(self):
-        """
-        Return all the distribution names known to this locator.
-        """
-        result = set()
-        page = self.get_page(self.base_url)
-        if not page:
-            raise DistlibException('Unable to get %s' % self.base_url)
-        for match in self._distname_re.finditer(page.data):
-            result.add(match.group(1))
-        return result
-
-class DirectoryLocator(Locator):
-    """
-    This class locates distributions in a directory tree.
-    """
-
-    def __init__(self, path, **kwargs):
-        """
-        Initialise an instance.
-        :param path: The root of the directory tree to search.
-        :param kwargs: Passed to the superclass constructor,
-                       except for:
-                       * recursive - if True (the default), subdirectories are
-                         recursed into. If False, only the top-level directory
-                         is searched,
-        """
-        self.recursive = kwargs.pop('recursive', True)
-        super(DirectoryLocator, self).__init__(**kwargs)
-        path = os.path.abspath(path)
-        if not os.path.isdir(path):  # pragma: no cover
-            raise DistlibException('Not a directory: %r' % path)
-        self.base_dir = path
-
-    def should_include(self, filename, parent):
-        """
-        Should a filename be considered as a candidate for a distribution
-        archive? As well as the filename, the directory which contains it
-        is provided, though not used by the current implementation.
-        """
-        return filename.endswith(self.downloadable_extensions)
-
-    def _get_project(self, name):
-        result = {'urls': {}, 'digests': {}}
-        for root, dirs, files in os.walk(self.base_dir):
-            for fn in files:
-                if self.should_include(fn, root):
-                    fn = os.path.join(root, fn)
-                    url = urlunparse(('file', '',
-                                      pathname2url(os.path.abspath(fn)),
-                                      '', '', ''))
-                    info = self.convert_url_to_download_info(url, name)
-                    if info:
-                        self._update_version_data(result, info)
-            if not self.recursive:
-                break
-        return result
-
-    def get_distribution_names(self):
-        """
-        Return all the distribution names known to this locator.
-        """
-        result = set()
-        for root, dirs, files in os.walk(self.base_dir):
-            for fn in files:
-                if self.should_include(fn, root):
-                    fn = os.path.join(root, fn)
-                    url = urlunparse(('file', '',
-                                      pathname2url(os.path.abspath(fn)),
-                                      '', '', ''))
-                    info = self.convert_url_to_download_info(url, None)
-                    if info:
-                        result.add(info['name'])
-            if not self.recursive:
-                break
-        return result
-
-class JSONLocator(Locator):
-    """
-    This locator uses special extended metadata (not available on PyPI) and is
-    the basis of performant dependency resolution in distlib. Other locators
-    require archive downloads before dependencies can be determined! As you
-    might imagine, that can be slow.
-    """
-    def get_distribution_names(self):
-        """
-        Return all the distribution names known to this locator.
-        """
-        raise NotImplementedError('Not available from this locator')
-
-    def _get_project(self, name):
-        result = {'urls': {}, 'digests': {}}
-        data = get_project_data(name)
-        if data:
-            for info in data.get('files', []):
-                if info['ptype'] != 'sdist' or info['pyversion'] != 'source':
-                    continue
-                # We don't store summary in project metadata as it makes
-                # the data bigger for no benefit during dependency
-                # resolution
-                dist = make_dist(data['name'], info['version'],
-                                 summary=data.get('summary',
-                                                  'Placeholder for summary'),
-                                 scheme=self.scheme)
-                md = dist.metadata
-                md.source_url = info['url']
-                # TODO SHA256 digest
-                if 'digest' in info and info['digest']:
-                    dist.digest = ('md5', info['digest'])
-                md.dependencies = info.get('requirements', {})
-                dist.exports = info.get('exports', {})
-                result[dist.version] = dist
-                result['urls'].setdefault(dist.version, set()).add(info['url'])
-        return result
-
-class DistPathLocator(Locator):
-    """
-    This locator finds installed distributions in a path. It can be useful for
-    adding to an :class:`AggregatingLocator`.
-    """
-    def __init__(self, distpath, **kwargs):
-        """
-        Initialise an instance.
-
-        :param distpath: A :class:`DistributionPath` instance to search.
-        """
-        super(DistPathLocator, self).__init__(**kwargs)
-        assert isinstance(distpath, DistributionPath)
-        self.distpath = distpath
-
-    def _get_project(self, name):
-        dist = self.distpath.get_distribution(name)
-        if dist is None:
-            result = {'urls': {}, 'digests': {}}
-        else:
-            result = {
-                dist.version: dist,
-                'urls': {dist.version: set([dist.source_url])},
-                'digests': {dist.version: set([None])}
-            }
-        return result
-
-
-class AggregatingLocator(Locator):
-    """
-    This class allows you to chain and/or merge a list of locators.
-    """
-    def __init__(self, *locators, **kwargs):
-        """
-        Initialise an instance.
-
-        :param locators: The list of locators to search.
-        :param kwargs: Passed to the superclass constructor,
-                       except for:
-                       * merge - if False (the default), the first successful
-                         search from any of the locators is returned. If True,
-                         the results from all locators are merged (this can be
-                         slow).
-        """
-        self.merge = kwargs.pop('merge', False)
-        self.locators = locators
-        super(AggregatingLocator, self).__init__(**kwargs)
-
-    def clear_cache(self):
-        super(AggregatingLocator, self).clear_cache()
-        for locator in self.locators:
-            locator.clear_cache()
-
-    def _set_scheme(self, value):
-        self._scheme = value
-        for locator in self.locators:
-            locator.scheme = value
-
-    scheme = property(Locator.scheme.fget, _set_scheme)
-
-    def _get_project(self, name):
-        result = {}
-        for locator in self.locators:
-            d = locator.get_project(name)
-            if d:
-                if self.merge:
-                    files = result.get('urls', {})
-                    digests = result.get('digests', {})
-                    # next line could overwrite result['urls'], result['digests']
-                    result.update(d)
-                    df = result.get('urls')
-                    if files and df:
-                        for k, v in files.items():
-                            if k in df:
-                                df[k] |= v
-                            else:
-                                df[k] = v
-                    dd = result.get('digests')
-                    if digests and dd:
-                        dd.update(digests)
-                else:
-                    # See issue #18. If any dists are found and we're looking
-                    # for specific constraints, we only return something if
-                    # a match is found. For example, if a DirectoryLocator
-                    # returns just foo (1.0) while we're looking for
-                    # foo (>= 2.0), we'll pretend there was nothing there so
-                    # that subsequent locators can be queried. Otherwise we
-                    # would just return foo (1.0) which would then lead to a
-                    # failure to find foo (>= 2.0), because other locators
-                    # weren't searched. Note that this only matters when
-                    # merge=False.
-                    if self.matcher is None:
-                        found = True
-                    else:
-                        found = False
-                        for k in d:
-                            if self.matcher.match(k):
-                                found = True
-                                break
-                    if found:
-                        result = d
-                        break
-        return result
-
-    def get_distribution_names(self):
-        """
-        Return all the distribution names known to this locator.
-        """
-        result = set()
-        for locator in self.locators:
-            try:
-                result |= locator.get_distribution_names()
-            except NotImplementedError:
-                pass
-        return result
-
-
-# We use a legacy scheme simply because most of the dists on PyPI use legacy
-# versions which don't conform to PEP 426 / PEP 440.
-default_locator = AggregatingLocator(
-                    JSONLocator(),
-                    SimpleScrapingLocator('https://pypi.python.org/simple/',
-                                          timeout=3.0),
-                    scheme='legacy')
-
-locate = default_locator.locate
-
-NAME_VERSION_RE = re.compile(r'(?P<name>[\w-]+)\s*'
-                             r'\(\s*(==\s*)?(?P<ver>[^)]+)\)$')
-
-class DependencyFinder(object):
-    """
-    Locate dependencies for distributions.
-    """
-
-    def __init__(self, locator=None):
-        """
-        Initialise an instance, using the specified locator
-        to locate distributions.
-        """
-        self.locator = locator or default_locator
-        self.scheme = get_scheme(self.locator.scheme)
-
-    def add_distribution(self, dist):
-        """
-        Add a distribution to the finder. This will update internal information
-        about who provides what.
-        :param dist: The distribution to add.
-        """
-        logger.debug('adding distribution %s', dist)
-        name = dist.key
-        self.dists_by_name[name] = dist
-        self.dists[(name, dist.version)] = dist
-        for p in dist.provides:
-            name, version = parse_name_and_version(p)
-            logger.debug('Add to provided: %s, %s, %s', name, version, dist)
-            self.provided.setdefault(name, set()).add((version, dist))
-
-    def remove_distribution(self, dist):
-        """
-        Remove a distribution from the finder. This will update internal
-        information about who provides what.
-        :param dist: The distribution to remove.
-        """
-        logger.debug('removing distribution %s', dist)
-        name = dist.key
-        del self.dists_by_name[name]
-        del self.dists[(name, dist.version)]
-        for p in dist.provides:
-            name, version = parse_name_and_version(p)
-            logger.debug('Remove from provided: %s, %s, %s', name, version, dist)
-            s = self.provided[name]
-            s.remove((version, dist))
-            if not s:
-                del self.provided[name]
-
-    def get_matcher(self, reqt):
-        """
-        Get a version matcher for a requirement.
-        :param reqt: The requirement
-        :type reqt: str
-        :return: A version matcher (an instance of
-                 :class:`distlib.version.Matcher`).
-        """
-        try:
-            matcher = self.scheme.matcher(reqt)
-        except UnsupportedVersionError:  # pragma: no cover
-            # XXX compat-mode if cannot read the version
-            name = reqt.split()[0]
-            matcher = self.scheme.matcher(name)
-        return matcher
-
-    def find_providers(self, reqt):
-        """
-        Find the distributions which can fulfill a requirement.
-
-        :param reqt: The requirement.
-         :type reqt: str
-        :return: A set of distribution which can fulfill the requirement.
-        """
-        matcher = self.get_matcher(reqt)
-        name = matcher.key   # case-insensitive
-        result = set()
-        provided = self.provided
-        if name in provided:
-            for version, provider in provided[name]:
-                try:
-                    match = matcher.match(version)
-                except UnsupportedVersionError:
-                    match = False
-
-                if match:
-                    result.add(provider)
-                    break
-        return result
-
-    def try_to_replace(self, provider, other, problems):
-        """
-        Attempt to replace one provider with another. This is typically used
-        when resolving dependencies from multiple sources, e.g. A requires
-        (B >= 1.0) while C requires (B >= 1.1).
-
-        For successful replacement, ``provider`` must meet all the requirements
-        which ``other`` fulfills.
-
-        :param provider: The provider we are trying to replace with.
-        :param other: The provider we're trying to replace.
-        :param problems: If False is returned, this will contain what
-                         problems prevented replacement. This is currently
-                         a tuple of the literal string 'cantreplace',
-                         ``provider``, ``other``  and the set of requirements
-                         that ``provider`` couldn't fulfill.
-        :return: True if we can replace ``other`` with ``provider``, else
-                 False.
-        """
-        rlist = self.reqts[other]
-        unmatched = set()
-        for s in rlist:
-            matcher = self.get_matcher(s)
-            if not matcher.match(provider.version):
-                unmatched.add(s)
-        if unmatched:
-            # can't replace other with provider
-            problems.add(('cantreplace', provider, other,
-                          frozenset(unmatched)))
-            result = False
-        else:
-            # can replace other with provider
-            self.remove_distribution(other)
-            del self.reqts[other]
-            for s in rlist:
-                self.reqts.setdefault(provider, set()).add(s)
-            self.add_distribution(provider)
-            result = True
-        return result
-
-    def find(self, requirement, meta_extras=None, prereleases=False):
-        """
-        Find a distribution and all distributions it depends on.
-
-        :param requirement: The requirement specifying the distribution to
-                            find, or a Distribution instance.
-        :param meta_extras: A list of meta extras such as :test:, :build: and
-                            so on.
-        :param prereleases: If ``True``, allow pre-release versions to be
-                            returned - otherwise, don't return prereleases
-                            unless they're all that's available.
-
-        Return a set of :class:`Distribution` instances and a set of
-        problems.
-
-        The distributions returned should be such that they have the
-        :attr:`required` attribute set to ``True`` if they were
-        from the ``requirement`` passed to ``find()``, and they have the
-        :attr:`build_time_dependency` attribute set to ``True`` unless they
-        are post-installation dependencies of the ``requirement``.
-
-        The problems should be a tuple consisting of the string
-        ``'unsatisfied'`` and the requirement which couldn't be satisfied
-        by any distribution known to the locator.
-        """
-
-        self.provided = {}
-        self.dists = {}
-        self.dists_by_name = {}
-        self.reqts = {}
-
-        meta_extras = set(meta_extras or [])
-        if ':*:' in meta_extras:
-            meta_extras.remove(':*:')
-            # :meta: and :run: are implicitly included
-            meta_extras |= set([':test:', ':build:', ':dev:'])
-
-        if isinstance(requirement, Distribution):
-            dist = odist = requirement
-            logger.debug('passed %s as requirement', odist)
-        else:
-            dist = odist = self.locator.locate(requirement,
-                                               prereleases=prereleases)
-            if dist is None:
-                raise DistlibException('Unable to locate %r' % requirement)
-            logger.debug('located %s', odist)
-        dist.requested = True
-        problems = set()
-        todo = set([dist])
-        install_dists = set([odist])
-        while todo:
-            dist = todo.pop()
-            name = dist.key     # case-insensitive
-            if name not in self.dists_by_name:
-                self.add_distribution(dist)
-            else:
-                #import pdb; pdb.set_trace()
-                other = self.dists_by_name[name]
-                if other != dist:
-                    self.try_to_replace(dist, other, problems)
-
-            ireqts = dist.run_requires | dist.meta_requires
-            sreqts = dist.build_requires
-            ereqts = set()
-            if meta_extras and dist in install_dists:
-                for key in ('test', 'build', 'dev'):
-                    e = ':%s:' % key
-                    if e in meta_extras:
-                        ereqts |= getattr(dist, '%s_requires' % key)
-            all_reqts = ireqts | sreqts | ereqts
-            for r in all_reqts:
-                providers = self.find_providers(r)
-                if not providers:
-                    logger.debug('No providers found for %r', r)
-                    provider = self.locator.locate(r, prereleases=prereleases)
-                    # If no provider is found and we didn't consider
-                    # prereleases, consider them now.
-                    if provider is None and not prereleases:
-                        provider = self.locator.locate(r, prereleases=True)
-                    if provider is None:
-                        logger.debug('Cannot satisfy %r', r)
-                        problems.add(('unsatisfied', r))
-                    else:
-                        n, v = provider.key, provider.version
-                        if (n, v) not in self.dists:
-                            todo.add(provider)
-                        providers.add(provider)
-                        if r in ireqts and dist in install_dists:
-                            install_dists.add(provider)
-                            logger.debug('Adding %s to install_dists',
-                                         provider.name_and_version)
-                for p in providers:
-                    name = p.key
-                    if name not in self.dists_by_name:
-                        self.reqts.setdefault(p, set()).add(r)
-                    else:
-                        other = self.dists_by_name[name]
-                        if other != p:
-                            # see if other can be replaced by p
-                            self.try_to_replace(p, other, problems)
-
-        dists = set(self.dists.values())
-        for dist in dists:
-            dist.build_time_dependency = dist not in install_dists
-            if dist.build_time_dependency:
-                logger.debug('%s is a build-time dependency only.',
-                             dist.name_and_version)
-        logger.debug('find done for %s', odist)
-        return dists, problems
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/manifest.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/manifest.py
deleted file mode 100644
index ca0fe44..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/manifest.py
+++ /dev/null
@@ -1,393 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-# Copyright (C) 2012-2013 Python Software Foundation.
-# See LICENSE.txt and CONTRIBUTORS.txt.
-#
-"""
-Class representing the list of files in a distribution.
-
-Equivalent to distutils.filelist, but fixes some problems.
-"""
-import fnmatch
-import logging
-import os
-import re
-import sys
-
-from . import DistlibException
-from .compat import fsdecode
-from .util import convert_path
-
-
-__all__ = ['Manifest']
-
-logger = logging.getLogger(__name__)
-
-# a \ followed by some spaces + EOL
-_COLLAPSE_PATTERN = re.compile('\\\\w*\n', re.M)
-_COMMENTED_LINE = re.compile('#.*?(?=\n)|\n(?=$)', re.M | re.S)
-
-#
-# Due to the different results returned by fnmatch.translate, we need
-# to do slightly different processing for Python 2.7 and 3.2 ... this needed
-# to be brought in for Python 3.6 onwards.
-#
-_PYTHON_VERSION = sys.version_info[:2]
-
-class Manifest(object):
-    """A list of files built by on exploring the filesystem and filtered by
-    applying various patterns to what we find there.
-    """
-
-    def __init__(self, base=None):
-        """
-        Initialise an instance.
-
-        :param base: The base directory to explore under.
-        """
-        self.base = os.path.abspath(os.path.normpath(base or os.getcwd()))
-        self.prefix = self.base + os.sep
-        self.allfiles = None
-        self.files = set()
-
-    #
-    # Public API
-    #
-
-    def findall(self):
-        """Find all files under the base and set ``allfiles`` to the absolute
-        pathnames of files found.
-        """
-        from stat import S_ISREG, S_ISDIR, S_ISLNK
-
-        self.allfiles = allfiles = []
-        root = self.base
-        stack = [root]
-        pop = stack.pop
-        push = stack.append
-
-        while stack:
-            root = pop()
-            names = os.listdir(root)
-
-            for name in names:
-                fullname = os.path.join(root, name)
-
-                # Avoid excess stat calls -- just one will do, thank you!
-                stat = os.stat(fullname)
-                mode = stat.st_mode
-                if S_ISREG(mode):
-                    allfiles.append(fsdecode(fullname))
-                elif S_ISDIR(mode) and not S_ISLNK(mode):
-                    push(fullname)
-
-    def add(self, item):
-        """
-        Add a file to the manifest.
-
-        :param item: The pathname to add. This can be relative to the base.
-        """
-        if not item.startswith(self.prefix):
-            item = os.path.join(self.base, item)
-        self.files.add(os.path.normpath(item))
-
-    def add_many(self, items):
-        """
-        Add a list of files to the manifest.
-
-        :param items: The pathnames to add. These can be relative to the base.
-        """
-        for item in items:
-            self.add(item)
-
-    def sorted(self, wantdirs=False):
-        """
-        Return sorted files in directory order
-        """
-
-        def add_dir(dirs, d):
-            dirs.add(d)
-            logger.debug('add_dir added %s', d)
-            if d != self.base:
-                parent, _ = os.path.split(d)
-                assert parent not in ('', '/')
-                add_dir(dirs, parent)
-
-        result = set(self.files)    # make a copy!
-        if wantdirs:
-            dirs = set()
-            for f in result:
-                add_dir(dirs, os.path.dirname(f))
-            result |= dirs
-        return [os.path.join(*path_tuple) for path_tuple in
-                sorted(os.path.split(path) for path in result)]
-
-    def clear(self):
-        """Clear all collected files."""
-        self.files = set()
-        self.allfiles = []
-
-    def process_directive(self, directive):
-        """
-        Process a directive which either adds some files from ``allfiles`` to
-        ``files``, or removes some files from ``files``.
-
-        :param directive: The directive to process. This should be in a format
-                     compatible with distutils ``MANIFEST.in`` files:
-
-                     http://docs.python.org/distutils/sourcedist.html#commands
-        """
-        # Parse the line: split it up, make sure the right number of words
-        # is there, and return the relevant words.  'action' is always
-        # defined: it's the first word of the line.  Which of the other
-        # three are defined depends on the action; it'll be either
-        # patterns, (dir and patterns), or (dirpattern).
-        action, patterns, thedir, dirpattern = self._parse_directive(directive)
-
-        # OK, now we know that the action is valid and we have the
-        # right number of words on the line for that action -- so we
-        # can proceed with minimal error-checking.
-        if action == 'include':
-            for pattern in patterns:
-                if not self._include_pattern(pattern, anchor=True):
-                    logger.warning('no files found matching %r', pattern)
-
-        elif action == 'exclude':
-            for pattern in patterns:
-                found = self._exclude_pattern(pattern, anchor=True)
-                #if not found:
-                #    logger.warning('no previously-included files '
-                #                   'found matching %r', pattern)
-
-        elif action == 'global-include':
-            for pattern in patterns:
-                if not self._include_pattern(pattern, anchor=False):
-                    logger.warning('no files found matching %r '
-                                   'anywhere in distribution', pattern)
-
-        elif action == 'global-exclude':
-            for pattern in patterns:
-                found = self._exclude_pattern(pattern, anchor=False)
-                #if not found:
-                #    logger.warning('no previously-included files '
-                #                   'matching %r found anywhere in '
-                #                   'distribution', pattern)
-
-        elif action == 'recursive-include':
-            for pattern in patterns:
-                if not self._include_pattern(pattern, prefix=thedir):
-                    logger.warning('no files found matching %r '
-                                   'under directory %r', pattern, thedir)
-
-        elif action == 'recursive-exclude':
-            for pattern in patterns:
-                found = self._exclude_pattern(pattern, prefix=thedir)
-                #if not found:
-                #    logger.warning('no previously-included files '
-                #                   'matching %r found under directory %r',
-                #                   pattern, thedir)
-
-        elif action == 'graft':
-            if not self._include_pattern(None, prefix=dirpattern):
-                logger.warning('no directories found matching %r',
-                               dirpattern)
-
-        elif action == 'prune':
-            if not self._exclude_pattern(None, prefix=dirpattern):
-                logger.warning('no previously-included directories found '
-                               'matching %r', dirpattern)
-        else:   # pragma: no cover
-            # This should never happen, as it should be caught in
-            # _parse_template_line
-            raise DistlibException(
-                'invalid action %r' % action)
-
-    #
-    # Private API
-    #
-
-    def _parse_directive(self, directive):
-        """
-        Validate a directive.
-        :param directive: The directive to validate.
-        :return: A tuple of action, patterns, thedir, dir_patterns
-        """
-        words = directive.split()
-        if len(words) == 1 and words[0] not in ('include', 'exclude',
-                                                'global-include',
-                                                'global-exclude',
-                                                'recursive-include',
-                                                'recursive-exclude',
-                                                'graft', 'prune'):
-            # no action given, let's use the default 'include'
-            words.insert(0, 'include')
-
-        action = words[0]
-        patterns = thedir = dir_pattern = None
-
-        if action in ('include', 'exclude',
-                      'global-include', 'global-exclude'):
-            if len(words) < 2:
-                raise DistlibException(
-                    '%r expects <pattern1> <pattern2> ...' % action)
-
-            patterns = [convert_path(word) for word in words[1:]]
-
-        elif action in ('recursive-include', 'recursive-exclude'):
-            if len(words) < 3:
-                raise DistlibException(
-                    '%r expects <dir> <pattern1> <pattern2> ...' % action)
-
-            thedir = convert_path(words[1])
-            patterns = [convert_path(word) for word in words[2:]]
-
-        elif action in ('graft', 'prune'):
-            if len(words) != 2:
-                raise DistlibException(
-                    '%r expects a single <dir_pattern>' % action)
-
-            dir_pattern = convert_path(words[1])
-
-        else:
-            raise DistlibException('unknown action %r' % action)
-
-        return action, patterns, thedir, dir_pattern
-
-    def _include_pattern(self, pattern, anchor=True, prefix=None,
-                         is_regex=False):
-        """Select strings (presumably filenames) from 'self.files' that
-        match 'pattern', a Unix-style wildcard (glob) pattern.
-
-        Patterns are not quite the same as implemented by the 'fnmatch'
-        module: '*' and '?'  match non-special characters, where "special"
-        is platform-dependent: slash on Unix; colon, slash, and backslash on
-        DOS/Windows; and colon on Mac OS.
-
-        If 'anchor' is true (the default), then the pattern match is more
-        stringent: "*.py" will match "foo.py" but not "foo/bar.py".  If
-        'anchor' is false, both of these will match.
-
-        If 'prefix' is supplied, then only filenames starting with 'prefix'
-        (itself a pattern) and ending with 'pattern', with anything in between
-        them, will match.  'anchor' is ignored in this case.
-
-        If 'is_regex' is true, 'anchor' and 'prefix' are ignored, and
-        'pattern' is assumed to be either a string containing a regex or a
-        regex object -- no translation is done, the regex is just compiled
-        and used as-is.
-
-        Selected strings will be added to self.files.
-
-        Return True if files are found.
-        """
-        # XXX docstring lying about what the special chars are?
-        found = False
-        pattern_re = self._translate_pattern(pattern, anchor, prefix, is_regex)
-
-        # delayed loading of allfiles list
-        if self.allfiles is None:
-            self.findall()
-
-        for name in self.allfiles:
-            if pattern_re.search(name):
-                self.files.add(name)
-                found = True
-        return found
-
-    def _exclude_pattern(self, pattern, anchor=True, prefix=None,
-                         is_regex=False):
-        """Remove strings (presumably filenames) from 'files' that match
-        'pattern'.
-
-        Other parameters are the same as for 'include_pattern()', above.
-        The list 'self.files' is modified in place. Return True if files are
-        found.
-
-        This API is public to allow e.g. exclusion of SCM subdirs, e.g. when
-        packaging source distributions
-        """
-        found = False
-        pattern_re = self._translate_pattern(pattern, anchor, prefix, is_regex)
-        for f in list(self.files):
-            if pattern_re.search(f):
-                self.files.remove(f)
-                found = True
-        return found
-
-    def _translate_pattern(self, pattern, anchor=True, prefix=None,
-                           is_regex=False):
-        """Translate a shell-like wildcard pattern to a compiled regular
-        expression.
-
-        Return the compiled regex.  If 'is_regex' true,
-        then 'pattern' is directly compiled to a regex (if it's a string)
-        or just returned as-is (assumes it's a regex object).
-        """
-        if is_regex:
-            if isinstance(pattern, str):
-                return re.compile(pattern)
-            else:
-                return pattern
-
-        if _PYTHON_VERSION > (3, 2):
-            # ditch start and end characters
-            start, _, end = self._glob_to_re('_').partition('_')
-
-        if pattern:
-            pattern_re = self._glob_to_re(pattern)
-            if _PYTHON_VERSION > (3, 2):
-                assert pattern_re.startswith(start) and pattern_re.endswith(end)
-        else:
-            pattern_re = ''
-
-        base = re.escape(os.path.join(self.base, ''))
-        if prefix is not None:
-            # ditch end of pattern character
-            if _PYTHON_VERSION <= (3, 2):
-                empty_pattern = self._glob_to_re('')
-                prefix_re = self._glob_to_re(prefix)[:-len(empty_pattern)]
-            else:
-                prefix_re = self._glob_to_re(prefix)
-                assert prefix_re.startswith(start) and prefix_re.endswith(end)
-                prefix_re = prefix_re[len(start): len(prefix_re) - len(end)]
-            sep = os.sep
-            if os.sep == '\\':
-                sep = r'\\'
-            if _PYTHON_VERSION <= (3, 2):
-                pattern_re = '^' + base + sep.join((prefix_re,
-                                                    '.*' + pattern_re))
-            else:
-                pattern_re = pattern_re[len(start): len(pattern_re) - len(end)]
-                pattern_re = r'%s%s%s%s.*%s%s' % (start, base, prefix_re, sep,
-                                                  pattern_re, end)
-        else:  # no prefix -- respect anchor flag
-            if anchor:
-                if _PYTHON_VERSION <= (3, 2):
-                    pattern_re = '^' + base + pattern_re
-                else:
-                    pattern_re = r'%s%s%s' % (start, base, pattern_re[len(start):])
-
-        return re.compile(pattern_re)
-
-    def _glob_to_re(self, pattern):
-        """Translate a shell-like glob pattern to a regular expression.
-
-        Return a string containing the regex.  Differs from
-        'fnmatch.translate()' in that '*' does not match "special characters"
-        (which are platform-specific).
-        """
-        pattern_re = fnmatch.translate(pattern)
-
-        # '?' and '*' in the glob pattern become '.' and '.*' in the RE, which
-        # IMHO is wrong -- '?' and '*' aren't supposed to match slash in Unix,
-        # and by extension they shouldn't match such "special characters" under
-        # any OS.  So change all non-escaped dots in the RE to match any
-        # character except the special characters (currently: just os.sep).
-        sep = os.sep
-        if os.sep == '\\':
-            # we're using a regex to manipulate a regex, so we need
-            # to escape the backslash twice
-            sep = r'\\\\'
-        escaped = r'\1[^%s]' % sep
-        pattern_re = re.sub(r'((?<!\\)(\\\\)*)\.', escaped, pattern_re)
-        return pattern_re
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/markers.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/markers.py
deleted file mode 100644
index ee1f3e2..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/markers.py
+++ /dev/null
@@ -1,131 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-# Copyright (C) 2012-2017 Vinay Sajip.
-# Licensed to the Python Software Foundation under a contributor agreement.
-# See LICENSE.txt and CONTRIBUTORS.txt.
-#
-"""
-Parser for the environment markers micro-language defined in PEP 508.
-"""
-
-# Note: In PEP 345, the micro-language was Python compatible, so the ast
-# module could be used to parse it. However, PEP 508 introduced operators such
-# as ~= and === which aren't in Python, necessitating a different approach.
-
-import os
-import sys
-import platform
-import re
-
-from .compat import python_implementation, urlparse, string_types
-from .util import in_venv, parse_marker
-
-__all__ = ['interpret']
-
-def _is_literal(o):
-    if not isinstance(o, string_types) or not o:
-        return False
-    return o[0] in '\'"'
-
-class Evaluator(object):
-    """
-    This class is used to evaluate marker expessions.
-    """
-
-    operations = {
-        '==': lambda x, y: x == y,
-        '===': lambda x, y: x == y,
-        '~=': lambda x, y: x == y or x > y,
-        '!=': lambda x, y: x != y,
-        '<':  lambda x, y: x < y,
-        '<=':  lambda x, y: x == y or x < y,
-        '>':  lambda x, y: x > y,
-        '>=':  lambda x, y: x == y or x > y,
-        'and': lambda x, y: x and y,
-        'or': lambda x, y: x or y,
-        'in': lambda x, y: x in y,
-        'not in': lambda x, y: x not in y,
-    }
-
-    def evaluate(self, expr, context):
-        """
-        Evaluate a marker expression returned by the :func:`parse_requirement`
-        function in the specified context.
-        """
-        if isinstance(expr, string_types):
-            if expr[0] in '\'"':
-                result = expr[1:-1]
-            else:
-                if expr not in context:
-                    raise SyntaxError('unknown variable: %s' % expr)
-                result = context[expr]
-        else:
-            assert isinstance(expr, dict)
-            op = expr['op']
-            if op not in self.operations:
-                raise NotImplementedError('op not implemented: %s' % op)
-            elhs = expr['lhs']
-            erhs = expr['rhs']
-            if _is_literal(expr['lhs']) and _is_literal(expr['rhs']):
-                raise SyntaxError('invalid comparison: %s %s %s' % (elhs, op, erhs))
-
-            lhs = self.evaluate(elhs, context)
-            rhs = self.evaluate(erhs, context)
-            result = self.operations[op](lhs, rhs)
-        return result
-
-def default_context():
-    def format_full_version(info):
-        version = '%s.%s.%s' % (info.major, info.minor, info.micro)
-        kind = info.releaselevel
-        if kind != 'final':
-            version += kind[0] + str(info.serial)
-        return version
-
-    if hasattr(sys, 'implementation'):
-        implementation_version = format_full_version(sys.implementation.version)
-        implementation_name = sys.implementation.name
-    else:
-        implementation_version = '0'
-        implementation_name = ''
-
-    result = {
-        'implementation_name': implementation_name,
-        'implementation_version': implementation_version,
-        'os_name': os.name,
-        'platform_machine': platform.machine(),
-        'platform_python_implementation': platform.python_implementation(),
-        'platform_release': platform.release(),
-        'platform_system': platform.system(),
-        'platform_version': platform.version(),
-        'platform_in_venv': str(in_venv()),
-        'python_full_version': platform.python_version(),
-        'python_version': platform.python_version()[:3],
-        'sys_platform': sys.platform,
-    }
-    return result
-
-DEFAULT_CONTEXT = default_context()
-del default_context
-
-evaluator = Evaluator()
-
-def interpret(marker, execution_context=None):
-    """
-    Interpret a marker and return a result depending on environment.
-
-    :param marker: The marker to interpret.
-    :type marker: str
-    :param execution_context: The context used for name lookup.
-    :type execution_context: mapping
-    """
-    try:
-        expr, rest = parse_marker(marker)
-    except Exception as e:
-        raise SyntaxError('Unable to interpret marker syntax: %s: %s' % (marker, e))
-    if rest and rest[0] != '#':
-        raise SyntaxError('unexpected trailing data in marker: %s: %s' % (marker, rest))
-    context = dict(DEFAULT_CONTEXT)
-    if execution_context:
-        context.update(execution_context)
-    return evaluator.evaluate(expr, context)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/metadata.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/metadata.py
deleted file mode 100644
index 77eed7f..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/metadata.py
+++ /dev/null
@@ -1,1094 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-# Copyright (C) 2012 The Python Software Foundation.
-# See LICENSE.txt and CONTRIBUTORS.txt.
-#
-"""Implementation of the Metadata for Python packages PEPs.
-
-Supports all metadata formats (1.0, 1.1, 1.2, and 2.0 experimental).
-"""
-from __future__ import unicode_literals
-
-import codecs
-from email import message_from_file
-import json
-import logging
-import re
-
-
-from . import DistlibException, __version__
-from .compat import StringIO, string_types, text_type
-from .markers import interpret
-from .util import extract_by_key, get_extras
-from .version import get_scheme, PEP440_VERSION_RE
-
-logger = logging.getLogger(__name__)
-
-
-class MetadataMissingError(DistlibException):
-    """A required metadata is missing"""
-
-
-class MetadataConflictError(DistlibException):
-    """Attempt to read or write metadata fields that are conflictual."""
-
-
-class MetadataUnrecognizedVersionError(DistlibException):
-    """Unknown metadata version number."""
-
-
-class MetadataInvalidError(DistlibException):
-    """A metadata value is invalid"""
-
-# public API of this module
-__all__ = ['Metadata', 'PKG_INFO_ENCODING', 'PKG_INFO_PREFERRED_VERSION']
-
-# Encoding used for the PKG-INFO files
-PKG_INFO_ENCODING = 'utf-8'
-
-# preferred version. Hopefully will be changed
-# to 1.2 once PEP 345 is supported everywhere
-PKG_INFO_PREFERRED_VERSION = '1.1'
-
-_LINE_PREFIX_1_2 = re.compile('\n       \\|')
-_LINE_PREFIX_PRE_1_2 = re.compile('\n        ')
-_241_FIELDS = ('Metadata-Version', 'Name', 'Version', 'Platform',
-               'Summary', 'Description',
-               'Keywords', 'Home-page', 'Author', 'Author-email',
-               'License')
-
-_314_FIELDS = ('Metadata-Version', 'Name', 'Version', 'Platform',
-               'Supported-Platform', 'Summary', 'Description',
-               'Keywords', 'Home-page', 'Author', 'Author-email',
-               'License', 'Classifier', 'Download-URL', 'Obsoletes',
-               'Provides', 'Requires')
-
-_314_MARKERS = ('Obsoletes', 'Provides', 'Requires', 'Classifier',
-                'Download-URL')
-
-_345_FIELDS = ('Metadata-Version', 'Name', 'Version', 'Platform',
-               'Supported-Platform', 'Summary', 'Description',
-               'Keywords', 'Home-page', 'Author', 'Author-email',
-               'Maintainer', 'Maintainer-email', 'License',
-               'Classifier', 'Download-URL', 'Obsoletes-Dist',
-               'Project-URL', 'Provides-Dist', 'Requires-Dist',
-               'Requires-Python', 'Requires-External')
-
-_345_MARKERS = ('Provides-Dist', 'Requires-Dist', 'Requires-Python',
-                'Obsoletes-Dist', 'Requires-External', 'Maintainer',
-                'Maintainer-email', 'Project-URL')
-
-_426_FIELDS = ('Metadata-Version', 'Name', 'Version', 'Platform',
-               'Supported-Platform', 'Summary', 'Description',
-               'Keywords', 'Home-page', 'Author', 'Author-email',
-               'Maintainer', 'Maintainer-email', 'License',
-               'Classifier', 'Download-URL', 'Obsoletes-Dist',
-               'Project-URL', 'Provides-Dist', 'Requires-Dist',
-               'Requires-Python', 'Requires-External', 'Private-Version',
-               'Obsoleted-By', 'Setup-Requires-Dist', 'Extension',
-               'Provides-Extra')
-
-_426_MARKERS = ('Private-Version', 'Provides-Extra', 'Obsoleted-By',
-                'Setup-Requires-Dist', 'Extension')
-
-# See issue #106: Sometimes 'Requires' occurs wrongly in the metadata. Include
-# it in the tuple literal below to allow it (for now)
-_566_FIELDS = _426_FIELDS + ('Description-Content-Type', 'Requires')
-
-_566_MARKERS = ('Description-Content-Type',)
-
-_ALL_FIELDS = set()
-_ALL_FIELDS.update(_241_FIELDS)
-_ALL_FIELDS.update(_314_FIELDS)
-_ALL_FIELDS.update(_345_FIELDS)
-_ALL_FIELDS.update(_426_FIELDS)
-_ALL_FIELDS.update(_566_FIELDS)
-
-EXTRA_RE = re.compile(r'''extra\s*==\s*("([^"]+)"|'([^']+)')''')
-
-
-def _version2fieldlist(version):
-    if version == '1.0':
-        return _241_FIELDS
-    elif version == '1.1':
-        return _314_FIELDS
-    elif version == '1.2':
-        return _345_FIELDS
-    elif version in ('1.3', '2.1'):
-        return _345_FIELDS + _566_FIELDS
-    elif version == '2.0':
-        return _426_FIELDS
-    raise MetadataUnrecognizedVersionError(version)
-
-
-def _best_version(fields):
-    """Detect the best version depending on the fields used."""
-    def _has_marker(keys, markers):
-        for marker in markers:
-            if marker in keys:
-                return True
-        return False
-
-    keys = []
-    for key, value in fields.items():
-        if value in ([], 'UNKNOWN', None):
-            continue
-        keys.append(key)
-
-    possible_versions = ['1.0', '1.1', '1.2', '1.3', '2.0', '2.1']
-
-    # first let's try to see if a field is not part of one of the version
-    for key in keys:
-        if key not in _241_FIELDS and '1.0' in possible_versions:
-            possible_versions.remove('1.0')
-            logger.debug('Removed 1.0 due to %s', key)
-        if key not in _314_FIELDS and '1.1' in possible_versions:
-            possible_versions.remove('1.1')
-            logger.debug('Removed 1.1 due to %s', key)
-        if key not in _345_FIELDS and '1.2' in possible_versions:
-            possible_versions.remove('1.2')
-            logger.debug('Removed 1.2 due to %s', key)
-        if key not in _566_FIELDS and '1.3' in possible_versions:
-            possible_versions.remove('1.3')
-            logger.debug('Removed 1.3 due to %s', key)
-        if key not in _566_FIELDS and '2.1' in possible_versions:
-            if key != 'Description':  # In 2.1, description allowed after headers
-                possible_versions.remove('2.1')
-                logger.debug('Removed 2.1 due to %s', key)
-        if key not in _426_FIELDS and '2.0' in possible_versions:
-            possible_versions.remove('2.0')
-            logger.debug('Removed 2.0 due to %s', key)
-
-    # possible_version contains qualified versions
-    if len(possible_versions) == 1:
-        return possible_versions[0]   # found !
-    elif len(possible_versions) == 0:
-        logger.debug('Out of options - unknown metadata set: %s', fields)
-        raise MetadataConflictError('Unknown metadata set')
-
-    # let's see if one unique marker is found
-    is_1_1 = '1.1' in possible_versions and _has_marker(keys, _314_MARKERS)
-    is_1_2 = '1.2' in possible_versions and _has_marker(keys, _345_MARKERS)
-    is_2_1 = '2.1' in possible_versions and _has_marker(keys, _566_MARKERS)
-    is_2_0 = '2.0' in possible_versions and _has_marker(keys, _426_MARKERS)
-    if int(is_1_1) + int(is_1_2) + int(is_2_1) + int(is_2_0) > 1:
-        raise MetadataConflictError('You used incompatible 1.1/1.2/2.0/2.1 fields')
-
-    # we have the choice, 1.0, or 1.2, or 2.0
-    #   - 1.0 has a broken Summary field but works with all tools
-    #   - 1.1 is to avoid
-    #   - 1.2 fixes Summary but has little adoption
-    #   - 2.0 adds more features and is very new
-    if not is_1_1 and not is_1_2 and not is_2_1 and not is_2_0:
-        # we couldn't find any specific marker
-        if PKG_INFO_PREFERRED_VERSION in possible_versions:
-            return PKG_INFO_PREFERRED_VERSION
-    if is_1_1:
-        return '1.1'
-    if is_1_2:
-        return '1.2'
-    if is_2_1:
-        return '2.1'
-
-    return '2.0'
-
-_ATTR2FIELD = {
-    'metadata_version': 'Metadata-Version',
-    'name': 'Name',
-    'version': 'Version',
-    'platform': 'Platform',
-    'supported_platform': 'Supported-Platform',
-    'summary': 'Summary',
-    'description': 'Description',
-    'keywords': 'Keywords',
-    'home_page': 'Home-page',
-    'author': 'Author',
-    'author_email': 'Author-email',
-    'maintainer': 'Maintainer',
-    'maintainer_email': 'Maintainer-email',
-    'license': 'License',
-    'classifier': 'Classifier',
-    'download_url': 'Download-URL',
-    'obsoletes_dist': 'Obsoletes-Dist',
-    'provides_dist': 'Provides-Dist',
-    'requires_dist': 'Requires-Dist',
-    'setup_requires_dist': 'Setup-Requires-Dist',
-    'requires_python': 'Requires-Python',
-    'requires_external': 'Requires-External',
-    'requires': 'Requires',
-    'provides': 'Provides',
-    'obsoletes': 'Obsoletes',
-    'project_url': 'Project-URL',
-    'private_version': 'Private-Version',
-    'obsoleted_by': 'Obsoleted-By',
-    'extension': 'Extension',
-    'provides_extra': 'Provides-Extra',
-}
-
-_PREDICATE_FIELDS = ('Requires-Dist', 'Obsoletes-Dist', 'Provides-Dist')
-_VERSIONS_FIELDS = ('Requires-Python',)
-_VERSION_FIELDS = ('Version',)
-_LISTFIELDS = ('Platform', 'Classifier', 'Obsoletes',
-               'Requires', 'Provides', 'Obsoletes-Dist',
-               'Provides-Dist', 'Requires-Dist', 'Requires-External',
-               'Project-URL', 'Supported-Platform', 'Setup-Requires-Dist',
-               'Provides-Extra', 'Extension')
-_LISTTUPLEFIELDS = ('Project-URL',)
-
-_ELEMENTSFIELD = ('Keywords',)
-
-_UNICODEFIELDS = ('Author', 'Maintainer', 'Summary', 'Description')
-
-_MISSING = object()
-
-_FILESAFE = re.compile('[^A-Za-z0-9.]+')
-
-
-def _get_name_and_version(name, version, for_filename=False):
-    """Return the distribution name with version.
-
-    If for_filename is true, return a filename-escaped form."""
-    if for_filename:
-        # For both name and version any runs of non-alphanumeric or '.'
-        # characters are replaced with a single '-'.  Additionally any
-        # spaces in the version string become '.'
-        name = _FILESAFE.sub('-', name)
-        version = _FILESAFE.sub('-', version.replace(' ', '.'))
-    return '%s-%s' % (name, version)
-
-
-class LegacyMetadata(object):
-    """The legacy metadata of a release.
-
-    Supports versions 1.0, 1.1 and 1.2 (auto-detected). You can
-    instantiate the class with one of these arguments (or none):
-    - *path*, the path to a metadata file
-    - *fileobj* give a file-like object with metadata as content
-    - *mapping* is a dict-like object
-    - *scheme* is a version scheme name
-    """
-    # TODO document the mapping API and UNKNOWN default key
-
-    def __init__(self, path=None, fileobj=None, mapping=None,
-                 scheme='default'):
-        if [path, fileobj, mapping].count(None) < 2:
-            raise TypeError('path, fileobj and mapping are exclusive')
-        self._fields = {}
-        self.requires_files = []
-        self._dependencies = None
-        self.scheme = scheme
-        if path is not None:
-            self.read(path)
-        elif fileobj is not None:
-            self.read_file(fileobj)
-        elif mapping is not None:
-            self.update(mapping)
-            self.set_metadata_version()
-
-    def set_metadata_version(self):
-        self._fields['Metadata-Version'] = _best_version(self._fields)
-
-    def _write_field(self, fileobj, name, value):
-        fileobj.write('%s: %s\n' % (name, value))
-
-    def __getitem__(self, name):
-        return self.get(name)
-
-    def __setitem__(self, name, value):
-        return self.set(name, value)
-
-    def __delitem__(self, name):
-        field_name = self._convert_name(name)
-        try:
-            del self._fields[field_name]
-        except KeyError:
-            raise KeyError(name)
-
-    def __contains__(self, name):
-        return (name in self._fields or
-                self._convert_name(name) in self._fields)
-
-    def _convert_name(self, name):
-        if name in _ALL_FIELDS:
-            return name
-        name = name.replace('-', '_').lower()
-        return _ATTR2FIELD.get(name, name)
-
-    def _default_value(self, name):
-        if name in _LISTFIELDS or name in _ELEMENTSFIELD:
-            return []
-        return 'UNKNOWN'
-
-    def _remove_line_prefix(self, value):
-        if self.metadata_version in ('1.0', '1.1'):
-            return _LINE_PREFIX_PRE_1_2.sub('\n', value)
-        else:
-            return _LINE_PREFIX_1_2.sub('\n', value)
-
-    def __getattr__(self, name):
-        if name in _ATTR2FIELD:
-            return self[name]
-        raise AttributeError(name)
-
-    #
-    # Public API
-    #
-
-#    dependencies = property(_get_dependencies, _set_dependencies)
-
-    def get_fullname(self, filesafe=False):
-        """Return the distribution name with version.
-
-        If filesafe is true, return a filename-escaped form."""
-        return _get_name_and_version(self['Name'], self['Version'], filesafe)
-
-    def is_field(self, name):
-        """return True if name is a valid metadata key"""
-        name = self._convert_name(name)
-        return name in _ALL_FIELDS
-
-    def is_multi_field(self, name):
-        name = self._convert_name(name)
-        return name in _LISTFIELDS
-
-    def read(self, filepath):
-        """Read the metadata values from a file path."""
-        fp = codecs.open(filepath, 'r', encoding='utf-8')
-        try:
-            self.read_file(fp)
-        finally:
-            fp.close()
-
-    def read_file(self, fileob):
-        """Read the metadata values from a file object."""
-        msg = message_from_file(fileob)
-        self._fields['Metadata-Version'] = msg['metadata-version']
-
-        # When reading, get all the fields we can
-        for field in _ALL_FIELDS:
-            if field not in msg:
-                continue
-            if field in _LISTFIELDS:
-                # we can have multiple lines
-                values = msg.get_all(field)
-                if field in _LISTTUPLEFIELDS and values is not None:
-                    values = [tuple(value.split(',')) for value in values]
-                self.set(field, values)
-            else:
-                # single line
-                value = msg[field]
-                if value is not None and value != 'UNKNOWN':
-                    self.set(field, value)
-        # logger.debug('Attempting to set metadata for %s', self)
-        # self.set_metadata_version()
-
-    def write(self, filepath, skip_unknown=False):
-        """Write the metadata fields to filepath."""
-        fp = codecs.open(filepath, 'w', encoding='utf-8')
-        try:
-            self.write_file(fp, skip_unknown)
-        finally:
-            fp.close()
-
-    def write_file(self, fileobject, skip_unknown=False):
-        """Write the PKG-INFO format data to a file object."""
-        self.set_metadata_version()
-
-        for field in _version2fieldlist(self['Metadata-Version']):
-            values = self.get(field)
-            if skip_unknown and values in ('UNKNOWN', [], ['UNKNOWN']):
-                continue
-            if field in _ELEMENTSFIELD:
-                self._write_field(fileobject, field, ','.join(values))
-                continue
-            if field not in _LISTFIELDS:
-                if field == 'Description':
-                    if self.metadata_version in ('1.0', '1.1'):
-                        values = values.replace('\n', '\n        ')
-                    else:
-                        values = values.replace('\n', '\n       |')
-                values = [values]
-
-            if field in _LISTTUPLEFIELDS:
-                values = [','.join(value) for value in values]
-
-            for value in values:
-                self._write_field(fileobject, field, value)
-
-    def update(self, other=None, **kwargs):
-        """Set metadata values from the given iterable `other` and kwargs.
-
-        Behavior is like `dict.update`: If `other` has a ``keys`` method,
-        they are looped over and ``self[key]`` is assigned ``other[key]``.
-        Else, ``other`` is an iterable of ``(key, value)`` iterables.
-
-        Keys that don't match a metadata field or that have an empty value are
-        dropped.
-        """
-        def _set(key, value):
-            if key in _ATTR2FIELD and value:
-                self.set(self._convert_name(key), value)
-
-        if not other:
-            # other is None or empty container
-            pass
-        elif hasattr(other, 'keys'):
-            for k in other.keys():
-                _set(k, other[k])
-        else:
-            for k, v in other:
-                _set(k, v)
-
-        if kwargs:
-            for k, v in kwargs.items():
-                _set(k, v)
-
-    def set(self, name, value):
-        """Control then set a metadata field."""
-        name = self._convert_name(name)
-
-        if ((name in _ELEMENTSFIELD or name == 'Platform') and
-            not isinstance(value, (list, tuple))):
-            if isinstance(value, string_types):
-                value = [v.strip() for v in value.split(',')]
-            else:
-                value = []
-        elif (name in _LISTFIELDS and
-              not isinstance(value, (list, tuple))):
-            if isinstance(value, string_types):
-                value = [value]
-            else:
-                value = []
-
-        if logger.isEnabledFor(logging.WARNING):
-            project_name = self['Name']
-
-            scheme = get_scheme(self.scheme)
-            if name in _PREDICATE_FIELDS and value is not None:
-                for v in value:
-                    # check that the values are valid
-                    if not scheme.is_valid_matcher(v.split(';')[0]):
-                        logger.warning(
-                            "'%s': '%s' is not valid (field '%s')",
-                            project_name, v, name)
-            # FIXME this rejects UNKNOWN, is that right?
-            elif name in _VERSIONS_FIELDS and value is not None:
-                if not scheme.is_valid_constraint_list(value):
-                    logger.warning("'%s': '%s' is not a valid version (field '%s')",
-                                   project_name, value, name)
-            elif name in _VERSION_FIELDS and value is not None:
-                if not scheme.is_valid_version(value):
-                    logger.warning("'%s': '%s' is not a valid version (field '%s')",
-                                   project_name, value, name)
-
-        if name in _UNICODEFIELDS:
-            if name == 'Description':
-                value = self._remove_line_prefix(value)
-
-        self._fields[name] = value
-
-    def get(self, name, default=_MISSING):
-        """Get a metadata field."""
-        name = self._convert_name(name)
-        if name not in self._fields:
-            if default is _MISSING:
-                default = self._default_value(name)
-            return default
-        if name in _UNICODEFIELDS:
-            value = self._fields[name]
-            return value
-        elif name in _LISTFIELDS:
-            value = self._fields[name]
-            if value is None:
-                return []
-            res = []
-            for val in value:
-                if name not in _LISTTUPLEFIELDS:
-                    res.append(val)
-                else:
-                    # That's for Project-URL
-                    res.append((val[0], val[1]))
-            return res
-
-        elif name in _ELEMENTSFIELD:
-            value = self._fields[name]
-            if isinstance(value, string_types):
-                return value.split(',')
-        return self._fields[name]
-
-    def check(self, strict=False):
-        """Check if the metadata is compliant. If strict is True then raise if
-        no Name or Version are provided"""
-        self.set_metadata_version()
-
-        # XXX should check the versions (if the file was loaded)
-        missing, warnings = [], []
-
-        for attr in ('Name', 'Version'):  # required by PEP 345
-            if attr not in self:
-                missing.append(attr)
-
-        if strict and missing != []:
-            msg = 'missing required metadata: %s' % ', '.join(missing)
-            raise MetadataMissingError(msg)
-
-        for attr in ('Home-page', 'Author'):
-            if attr not in self:
-                missing.append(attr)
-
-        # checking metadata 1.2 (XXX needs to check 1.1, 1.0)
-        if self['Metadata-Version'] != '1.2':
-            return missing, warnings
-
-        scheme = get_scheme(self.scheme)
-
-        def are_valid_constraints(value):
-            for v in value:
-                if not scheme.is_valid_matcher(v.split(';')[0]):
-                    return False
-            return True
-
-        for fields, controller in ((_PREDICATE_FIELDS, are_valid_constraints),
-                                   (_VERSIONS_FIELDS,
-                                    scheme.is_valid_constraint_list),
-                                   (_VERSION_FIELDS,
-                                    scheme.is_valid_version)):
-            for field in fields:
-                value = self.get(field, None)
-                if value is not None and not controller(value):
-                    warnings.append("Wrong value for '%s': %s" % (field, value))
-
-        return missing, warnings
-
-    def todict(self, skip_missing=False):
-        """Return fields as a dict.
-
-        Field names will be converted to use the underscore-lowercase style
-        instead of hyphen-mixed case (i.e. home_page instead of Home-page).
-        """
-        self.set_metadata_version()
-
-        mapping_1_0 = (
-            ('metadata_version', 'Metadata-Version'),
-            ('name', 'Name'),
-            ('version', 'Version'),
-            ('summary', 'Summary'),
-            ('home_page', 'Home-page'),
-            ('author', 'Author'),
-            ('author_email', 'Author-email'),
-            ('license', 'License'),
-            ('description', 'Description'),
-            ('keywords', 'Keywords'),
-            ('platform', 'Platform'),
-            ('classifiers', 'Classifier'),
-            ('download_url', 'Download-URL'),
-        )
-
-        data = {}
-        for key, field_name in mapping_1_0:
-            if not skip_missing or field_name in self._fields:
-                data[key] = self[field_name]
-
-        if self['Metadata-Version'] == '1.2':
-            mapping_1_2 = (
-                ('requires_dist', 'Requires-Dist'),
-                ('requires_python', 'Requires-Python'),
-                ('requires_external', 'Requires-External'),
-                ('provides_dist', 'Provides-Dist'),
-                ('obsoletes_dist', 'Obsoletes-Dist'),
-                ('project_url', 'Project-URL'),
-                ('maintainer', 'Maintainer'),
-                ('maintainer_email', 'Maintainer-email'),
-            )
-            for key, field_name in mapping_1_2:
-                if not skip_missing or field_name in self._fields:
-                    if key != 'project_url':
-                        data[key] = self[field_name]
-                    else:
-                        data[key] = [','.join(u) for u in self[field_name]]
-
-        elif self['Metadata-Version'] == '1.1':
-            mapping_1_1 = (
-                ('provides', 'Provides'),
-                ('requires', 'Requires'),
-                ('obsoletes', 'Obsoletes'),
-            )
-            for key, field_name in mapping_1_1:
-                if not skip_missing or field_name in self._fields:
-                    data[key] = self[field_name]
-
-        return data
-
-    def add_requirements(self, requirements):
-        if self['Metadata-Version'] == '1.1':
-            # we can't have 1.1 metadata *and* Setuptools requires
-            for field in ('Obsoletes', 'Requires', 'Provides'):
-                if field in self:
-                    del self[field]
-        self['Requires-Dist'] += requirements
-
-    # Mapping API
-    # TODO could add iter* variants
-
-    def keys(self):
-        return list(_version2fieldlist(self['Metadata-Version']))
-
-    def __iter__(self):
-        for key in self.keys():
-            yield key
-
-    def values(self):
-        return [self[key] for key in self.keys()]
-
-    def items(self):
-        return [(key, self[key]) for key in self.keys()]
-
-    def __repr__(self):
-        return '<%s %s %s>' % (self.__class__.__name__, self.name,
-                               self.version)
-
-
-METADATA_FILENAME = 'pydist.json'
-WHEEL_METADATA_FILENAME = 'metadata.json'
-LEGACY_METADATA_FILENAME = 'METADATA'
-
-
-class Metadata(object):
-    """
-    The metadata of a release. This implementation uses 2.0 (JSON)
-    metadata where possible. If not possible, it wraps a LegacyMetadata
-    instance which handles the key-value metadata format.
-    """
-
-    METADATA_VERSION_MATCHER = re.compile(r'^\d+(\.\d+)*$')
-
-    NAME_MATCHER = re.compile('^[0-9A-Z]([0-9A-Z_.-]*[0-9A-Z])?$', re.I)
-
-    VERSION_MATCHER = PEP440_VERSION_RE
-
-    SUMMARY_MATCHER = re.compile('.{1,2047}')
-
-    METADATA_VERSION = '2.0'
-
-    GENERATOR = 'distlib (%s)' % __version__
-
-    MANDATORY_KEYS = {
-        'name': (),
-        'version': (),
-        'summary': ('legacy',),
-    }
-
-    INDEX_KEYS = ('name version license summary description author '
-                  'author_email keywords platform home_page classifiers '
-                  'download_url')
-
-    DEPENDENCY_KEYS = ('extras run_requires test_requires build_requires '
-                       'dev_requires provides meta_requires obsoleted_by '
-                       'supports_environments')
-
-    SYNTAX_VALIDATORS = {
-        'metadata_version': (METADATA_VERSION_MATCHER, ()),
-        'name': (NAME_MATCHER, ('legacy',)),
-        'version': (VERSION_MATCHER, ('legacy',)),
-        'summary': (SUMMARY_MATCHER, ('legacy',)),
-    }
-
-    __slots__ = ('_legacy', '_data', 'scheme')
-
-    def __init__(self, path=None, fileobj=None, mapping=None,
-                 scheme='default'):
-        if [path, fileobj, mapping].count(None) < 2:
-            raise TypeError('path, fileobj and mapping are exclusive')
-        self._legacy = None
-        self._data = None
-        self.scheme = scheme
-        #import pdb; pdb.set_trace()
-        if mapping is not None:
-            try:
-                self._validate_mapping(mapping, scheme)
-                self._data = mapping
-            except MetadataUnrecognizedVersionError:
-                self._legacy = LegacyMetadata(mapping=mapping, scheme=scheme)
-                self.validate()
-        else:
-            data = None
-            if path:
-                with open(path, 'rb') as f:
-                    data = f.read()
-            elif fileobj:
-                data = fileobj.read()
-            if data is None:
-                # Initialised with no args - to be added
-                self._data = {
-                    'metadata_version': self.METADATA_VERSION,
-                    'generator': self.GENERATOR,
-                }
-            else:
-                if not isinstance(data, text_type):
-                    data = data.decode('utf-8')
-                try:
-                    self._data = json.loads(data)
-                    self._validate_mapping(self._data, scheme)
-                except ValueError:
-                    # Note: MetadataUnrecognizedVersionError does not
-                    # inherit from ValueError (it's a DistlibException,
-                    # which should not inherit from ValueError).
-                    # The ValueError comes from the json.load - if that
-                    # succeeds and we get a validation error, we want
-                    # that to propagate
-                    self._legacy = LegacyMetadata(fileobj=StringIO(data),
-                                                  scheme=scheme)
-                    self.validate()
-
-    common_keys = set(('name', 'version', 'license', 'keywords', 'summary'))
-
-    none_list = (None, list)
-    none_dict = (None, dict)
-
-    mapped_keys = {
-        'run_requires': ('Requires-Dist', list),
-        'build_requires': ('Setup-Requires-Dist', list),
-        'dev_requires': none_list,
-        'test_requires': none_list,
-        'meta_requires': none_list,
-        'extras': ('Provides-Extra', list),
-        'modules': none_list,
-        'namespaces': none_list,
-        'exports': none_dict,
-        'commands': none_dict,
-        'classifiers': ('Classifier', list),
-        'source_url': ('Download-URL', None),
-        'metadata_version': ('Metadata-Version', None),
-    }
-
-    del none_list, none_dict
-
-    def __getattribute__(self, key):
-        common = object.__getattribute__(self, 'common_keys')
-        mapped = object.__getattribute__(self, 'mapped_keys')
-        if key in mapped:
-            lk, maker = mapped[key]
-            if self._legacy:
-                if lk is None:
-                    result = None if maker is None else maker()
-                else:
-                    result = self._legacy.get(lk)
-            else:
-                value = None if maker is None else maker()
-                if key not in ('commands', 'exports', 'modules', 'namespaces',
-                               'classifiers'):
-                    result = self._data.get(key, value)
-                else:
-                    # special cases for PEP 459
-                    sentinel = object()
-                    result = sentinel
-                    d = self._data.get('extensions')
-                    if d:
-                        if key == 'commands':
-                            result = d.get('python.commands', value)
-                        elif key == 'classifiers':
-                            d = d.get('python.details')
-                            if d:
-                                result = d.get(key, value)
-                        else:
-                            d = d.get('python.exports')
-                            if not d:
-                                d = self._data.get('python.exports')
-                            if d:
-                                result = d.get(key, value)
-                    if result is sentinel:
-                        result = value
-        elif key not in common:
-            result = object.__getattribute__(self, key)
-        elif self._legacy:
-            result = self._legacy.get(key)
-        else:
-            result = self._data.get(key)
-        return result
-
-    def _validate_value(self, key, value, scheme=None):
-        if key in self.SYNTAX_VALIDATORS:
-            pattern, exclusions = self.SYNTAX_VALIDATORS[key]
-            if (scheme or self.scheme) not in exclusions:
-                m = pattern.match(value)
-                if not m:
-                    raise MetadataInvalidError("'%s' is an invalid value for "
-                                               "the '%s' property" % (value,
-                                                                    key))
-
-    def __setattr__(self, key, value):
-        self._validate_value(key, value)
-        common = object.__getattribute__(self, 'common_keys')
-        mapped = object.__getattribute__(self, 'mapped_keys')
-        if key in mapped:
-            lk, _ = mapped[key]
-            if self._legacy:
-                if lk is None:
-                    raise NotImplementedError
-                self._legacy[lk] = value
-            elif key not in ('commands', 'exports', 'modules', 'namespaces',
-                             'classifiers'):
-                self._data[key] = value
-            else:
-                # special cases for PEP 459
-                d = self._data.setdefault('extensions', {})
-                if key == 'commands':
-                    d['python.commands'] = value
-                elif key == 'classifiers':
-                    d = d.setdefault('python.details', {})
-                    d[key] = value
-                else:
-                    d = d.setdefault('python.exports', {})
-                    d[key] = value
-        elif key not in common:
-            object.__setattr__(self, key, value)
-        else:
-            if key == 'keywords':
-                if isinstance(value, string_types):
-                    value = value.strip()
-                    if value:
-                        value = value.split()
-                    else:
-                        value = []
-            if self._legacy:
-                self._legacy[key] = value
-            else:
-                self._data[key] = value
-
-    @property
-    def name_and_version(self):
-        return _get_name_and_version(self.name, self.version, True)
-
-    @property
-    def provides(self):
-        if self._legacy:
-            result = self._legacy['Provides-Dist']
-        else:
-            result = self._data.setdefault('provides', [])
-        s = '%s (%s)' % (self.name, self.version)
-        if s not in result:
-            result.append(s)
-        return result
-
-    @provides.setter
-    def provides(self, value):
-        if self._legacy:
-            self._legacy['Provides-Dist'] = value
-        else:
-            self._data['provides'] = value
-
-    def get_requirements(self, reqts, extras=None, env=None):
-        """
-        Base method to get dependencies, given a set of extras
-        to satisfy and an optional environment context.
-        :param reqts: A list of sometimes-wanted dependencies,
-                      perhaps dependent on extras and environment.
-        :param extras: A list of optional components being requested.
-        :param env: An optional environment for marker evaluation.
-        """
-        if self._legacy:
-            result = reqts
-        else:
-            result = []
-            extras = get_extras(extras or [], self.extras)
-            for d in reqts:
-                if 'extra' not in d and 'environment' not in d:
-                    # unconditional
-                    include = True
-                else:
-                    if 'extra' not in d:
-                        # Not extra-dependent - only environment-dependent
-                        include = True
-                    else:
-                        include = d.get('extra') in extras
-                    if include:
-                        # Not excluded because of extras, check environment
-                        marker = d.get('environment')
-                        if marker:
-                            include = interpret(marker, env)
-                if include:
-                    result.extend(d['requires'])
-            for key in ('build', 'dev', 'test'):
-                e = ':%s:' % key
-                if e in extras:
-                    extras.remove(e)
-                    # A recursive call, but it should terminate since 'test'
-                    # has been removed from the extras
-                    reqts = self._data.get('%s_requires' % key, [])
-                    result.extend(self.get_requirements(reqts, extras=extras,
-                                                        env=env))
-        return result
-
-    @property
-    def dictionary(self):
-        if self._legacy:
-            return self._from_legacy()
-        return self._data
-
-    @property
-    def dependencies(self):
-        if self._legacy:
-            raise NotImplementedError
-        else:
-            return extract_by_key(self._data, self.DEPENDENCY_KEYS)
-
-    @dependencies.setter
-    def dependencies(self, value):
-        if self._legacy:
-            raise NotImplementedError
-        else:
-            self._data.update(value)
-
-    def _validate_mapping(self, mapping, scheme):
-        if mapping.get('metadata_version') != self.METADATA_VERSION:
-            raise MetadataUnrecognizedVersionError()
-        missing = []
-        for key, exclusions in self.MANDATORY_KEYS.items():
-            if key not in mapping:
-                if scheme not in exclusions:
-                    missing.append(key)
-        if missing:
-            msg = 'Missing metadata items: %s' % ', '.join(missing)
-            raise MetadataMissingError(msg)
-        for k, v in mapping.items():
-            self._validate_value(k, v, scheme)
-
-    def validate(self):
-        if self._legacy:
-            missing, warnings = self._legacy.check(True)
-            if missing or warnings:
-                logger.warning('Metadata: missing: %s, warnings: %s',
-                               missing, warnings)
-        else:
-            self._validate_mapping(self._data, self.scheme)
-
-    def todict(self):
-        if self._legacy:
-            return self._legacy.todict(True)
-        else:
-            result = extract_by_key(self._data, self.INDEX_KEYS)
-            return result
-
-    def _from_legacy(self):
-        assert self._legacy and not self._data
-        result = {
-            'metadata_version': self.METADATA_VERSION,
-            'generator': self.GENERATOR,
-        }
-        lmd = self._legacy.todict(True)     # skip missing ones
-        for k in ('name', 'version', 'license', 'summary', 'description',
-                  'classifier'):
-            if k in lmd:
-                if k == 'classifier':
-                    nk = 'classifiers'
-                else:
-                    nk = k
-                result[nk] = lmd[k]
-        kw = lmd.get('Keywords', [])
-        if kw == ['']:
-            kw = []
-        result['keywords'] = kw
-        keys = (('requires_dist', 'run_requires'),
-                ('setup_requires_dist', 'build_requires'))
-        for ok, nk in keys:
-            if ok in lmd and lmd[ok]:
-                result[nk] = [{'requires': lmd[ok]}]
-        result['provides'] = self.provides
-        author = {}
-        maintainer = {}
-        return result
-
-    LEGACY_MAPPING = {
-        'name': 'Name',
-        'version': 'Version',
-        'license': 'License',
-        'summary': 'Summary',
-        'description': 'Description',
-        'classifiers': 'Classifier',
-    }
-
-    def _to_legacy(self):
-        def process_entries(entries):
-            reqts = set()
-            for e in entries:
-                extra = e.get('extra')
-                env = e.get('environment')
-                rlist = e['requires']
-                for r in rlist:
-                    if not env and not extra:
-                        reqts.add(r)
-                    else:
-                        marker = ''
-                        if extra:
-                            marker = 'extra == "%s"' % extra
-                        if env:
-                            if marker:
-                                marker = '(%s) and %s' % (env, marker)
-                            else:
-                                marker = env
-                        reqts.add(';'.join((r, marker)))
-            return reqts
-
-        assert self._data and not self._legacy
-        result = LegacyMetadata()
-        nmd = self._data
-        for nk, ok in self.LEGACY_MAPPING.items():
-            if nk in nmd:
-                result[ok] = nmd[nk]
-        r1 = process_entries(self.run_requires + self.meta_requires)
-        r2 = process_entries(self.build_requires + self.dev_requires)
-        if self.extras:
-            result['Provides-Extra'] = sorted(self.extras)
-        result['Requires-Dist'] = sorted(r1)
-        result['Setup-Requires-Dist'] = sorted(r2)
-        # TODO: other fields such as contacts
-        return result
-
-    def write(self, path=None, fileobj=None, legacy=False, skip_unknown=True):
-        if [path, fileobj].count(None) != 1:
-            raise ValueError('Exactly one of path and fileobj is needed')
-        self.validate()
-        if legacy:
-            if self._legacy:
-                legacy_md = self._legacy
-            else:
-                legacy_md = self._to_legacy()
-            if path:
-                legacy_md.write(path, skip_unknown=skip_unknown)
-            else:
-                legacy_md.write_file(fileobj, skip_unknown=skip_unknown)
-        else:
-            if self._legacy:
-                d = self._from_legacy()
-            else:
-                d = self._data
-            if fileobj:
-                json.dump(d, fileobj, ensure_ascii=True, indent=2,
-                          sort_keys=True)
-            else:
-                with codecs.open(path, 'w', 'utf-8') as f:
-                    json.dump(d, f, ensure_ascii=True, indent=2,
-                              sort_keys=True)
-
-    def add_requirements(self, requirements):
-        if self._legacy:
-            self._legacy.add_requirements(requirements)
-        else:
-            run_requires = self._data.setdefault('run_requires', [])
-            always = None
-            for entry in run_requires:
-                if 'environment' not in entry and 'extra' not in entry:
-                    always = entry
-                    break
-            if always is None:
-                always = { 'requires': requirements }
-                run_requires.insert(0, always)
-            else:
-                rset = set(always['requires']) | set(requirements)
-                always['requires'] = sorted(rset)
-
-    def __repr__(self):
-        name = self.name or '(no name)'
-        version = self.version or 'no version'
-        return '<%s %s %s (%s)>' % (self.__class__.__name__,
-                                    self.metadata_version, name, version)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/resources.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/resources.py
deleted file mode 100644
index 1884016..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/resources.py
+++ /dev/null
@@ -1,355 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-# Copyright (C) 2013-2017 Vinay Sajip.
-# Licensed to the Python Software Foundation under a contributor agreement.
-# See LICENSE.txt and CONTRIBUTORS.txt.
-#
-from __future__ import unicode_literals
-
-import bisect
-import io
-import logging
-import os
-import pkgutil
-import shutil
-import sys
-import types
-import zipimport
-
-from . import DistlibException
-from .util import cached_property, get_cache_base, path_to_cache_dir, Cache
-
-logger = logging.getLogger(__name__)
-
-
-cache = None    # created when needed
-
-
-class ResourceCache(Cache):
-    def __init__(self, base=None):
-        if base is None:
-            # Use native string to avoid issues on 2.x: see Python #20140.
-            base = os.path.join(get_cache_base(), str('resource-cache'))
-        super(ResourceCache, self).__init__(base)
-
-    def is_stale(self, resource, path):
-        """
-        Is the cache stale for the given resource?
-
-        :param resource: The :class:`Resource` being cached.
-        :param path: The path of the resource in the cache.
-        :return: True if the cache is stale.
-        """
-        # Cache invalidation is a hard problem :-)
-        return True
-
-    def get(self, resource):
-        """
-        Get a resource into the cache,
-
-        :param resource: A :class:`Resource` instance.
-        :return: The pathname of the resource in the cache.
-        """
-        prefix, path = resource.finder.get_cache_info(resource)
-        if prefix is None:
-            result = path
-        else:
-            result = os.path.join(self.base, self.prefix_to_dir(prefix), path)
-            dirname = os.path.dirname(result)
-            if not os.path.isdir(dirname):
-                os.makedirs(dirname)
-            if not os.path.exists(result):
-                stale = True
-            else:
-                stale = self.is_stale(resource, path)
-            if stale:
-                # write the bytes of the resource to the cache location
-                with open(result, 'wb') as f:
-                    f.write(resource.bytes)
-        return result
-
-
-class ResourceBase(object):
-    def __init__(self, finder, name):
-        self.finder = finder
-        self.name = name
-
-
-class Resource(ResourceBase):
-    """
-    A class representing an in-package resource, such as a data file. This is
-    not normally instantiated by user code, but rather by a
-    :class:`ResourceFinder` which manages the resource.
-    """
-    is_container = False        # Backwards compatibility
-
-    def as_stream(self):
-        """
-        Get the resource as a stream.
-
-        This is not a property to make it obvious that it returns a new stream
-        each time.
-        """
-        return self.finder.get_stream(self)
-
-    @cached_property
-    def file_path(self):
-        global cache
-        if cache is None:
-            cache = ResourceCache()
-        return cache.get(self)
-
-    @cached_property
-    def bytes(self):
-        return self.finder.get_bytes(self)
-
-    @cached_property
-    def size(self):
-        return self.finder.get_size(self)
-
-
-class ResourceContainer(ResourceBase):
-    is_container = True     # Backwards compatibility
-
-    @cached_property
-    def resources(self):
-        return self.finder.get_resources(self)
-
-
-class ResourceFinder(object):
-    """
-    Resource finder for file system resources.
-    """
-
-    if sys.platform.startswith('java'):
-        skipped_extensions = ('.pyc', '.pyo', '.class')
-    else:
-        skipped_extensions = ('.pyc', '.pyo')
-
-    def __init__(self, module):
-        self.module = module
-        self.loader = getattr(module, '__loader__', None)
-        self.base = os.path.dirname(getattr(module, '__file__', ''))
-
-    def _adjust_path(self, path):
-        return os.path.realpath(path)
-
-    def _make_path(self, resource_name):
-        # Issue #50: need to preserve type of path on Python 2.x
-        # like os.path._get_sep
-        if isinstance(resource_name, bytes):    # should only happen on 2.x
-            sep = b'/'
-        else:
-            sep = '/'
-        parts = resource_name.split(sep)
-        parts.insert(0, self.base)
-        result = os.path.join(*parts)
-        return self._adjust_path(result)
-
-    def _find(self, path):
-        return os.path.exists(path)
-
-    def get_cache_info(self, resource):
-        return None, resource.path
-
-    def find(self, resource_name):
-        path = self._make_path(resource_name)
-        if not self._find(path):
-            result = None
-        else:
-            if self._is_directory(path):
-                result = ResourceContainer(self, resource_name)
-            else:
-                result = Resource(self, resource_name)
-            result.path = path
-        return result
-
-    def get_stream(self, resource):
-        return open(resource.path, 'rb')
-
-    def get_bytes(self, resource):
-        with open(resource.path, 'rb') as f:
-            return f.read()
-
-    def get_size(self, resource):
-        return os.path.getsize(resource.path)
-
-    def get_resources(self, resource):
-        def allowed(f):
-            return (f != '__pycache__' and not
-                    f.endswith(self.skipped_extensions))
-        return set([f for f in os.listdir(resource.path) if allowed(f)])
-
-    def is_container(self, resource):
-        return self._is_directory(resource.path)
-
-    _is_directory = staticmethod(os.path.isdir)
-
-    def iterator(self, resource_name):
-        resource = self.find(resource_name)
-        if resource is not None:
-            todo = [resource]
-            while todo:
-                resource = todo.pop(0)
-                yield resource
-                if resource.is_container:
-                    rname = resource.name
-                    for name in resource.resources:
-                        if not rname:
-                            new_name = name
-                        else:
-                            new_name = '/'.join([rname, name])
-                        child = self.find(new_name)
-                        if child.is_container:
-                            todo.append(child)
-                        else:
-                            yield child
-
-
-class ZipResourceFinder(ResourceFinder):
-    """
-    Resource finder for resources in .zip files.
-    """
-    def __init__(self, module):
-        super(ZipResourceFinder, self).__init__(module)
-        archive = self.loader.archive
-        self.prefix_len = 1 + len(archive)
-        # PyPy doesn't have a _files attr on zipimporter, and you can't set one
-        if hasattr(self.loader, '_files'):
-            self._files = self.loader._files
-        else:
-            self._files = zipimport._zip_directory_cache[archive]
-        self.index = sorted(self._files)
-
-    def _adjust_path(self, path):
-        return path
-
-    def _find(self, path):
-        path = path[self.prefix_len:]
-        if path in self._files:
-            result = True
-        else:
-            if path and path[-1] != os.sep:
-                path = path + os.sep
-            i = bisect.bisect(self.index, path)
-            try:
-                result = self.index[i].startswith(path)
-            except IndexError:
-                result = False
-        if not result:
-            logger.debug('_find failed: %r %r', path, self.loader.prefix)
-        else:
-            logger.debug('_find worked: %r %r', path, self.loader.prefix)
-        return result
-
-    def get_cache_info(self, resource):
-        prefix = self.loader.archive
-        path = resource.path[1 + len(prefix):]
-        return prefix, path
-
-    def get_bytes(self, resource):
-        return self.loader.get_data(resource.path)
-
-    def get_stream(self, resource):
-        return io.BytesIO(self.get_bytes(resource))
-
-    def get_size(self, resource):
-        path = resource.path[self.prefix_len:]
-        return self._files[path][3]
-
-    def get_resources(self, resource):
-        path = resource.path[self.prefix_len:]
-        if path and path[-1] != os.sep:
-            path += os.sep
-        plen = len(path)
-        result = set()
-        i = bisect.bisect(self.index, path)
-        while i < len(self.index):
-            if not self.index[i].startswith(path):
-                break
-            s = self.index[i][plen:]
-            result.add(s.split(os.sep, 1)[0])   # only immediate children
-            i += 1
-        return result
-
-    def _is_directory(self, path):
-        path = path[self.prefix_len:]
-        if path and path[-1] != os.sep:
-            path += os.sep
-        i = bisect.bisect(self.index, path)
-        try:
-            result = self.index[i].startswith(path)
-        except IndexError:
-            result = False
-        return result
-
-_finder_registry = {
-    type(None): ResourceFinder,
-    zipimport.zipimporter: ZipResourceFinder
-}
-
-try:
-    # In Python 3.6, _frozen_importlib -> _frozen_importlib_external
-    try:
-        import _frozen_importlib_external as _fi
-    except ImportError:
-        import _frozen_importlib as _fi
-    _finder_registry[_fi.SourceFileLoader] = ResourceFinder
-    _finder_registry[_fi.FileFinder] = ResourceFinder
-    del _fi
-except (ImportError, AttributeError):
-    pass
-
-
-def register_finder(loader, finder_maker):
-    _finder_registry[type(loader)] = finder_maker
-
-_finder_cache = {}
-
-
-def finder(package):
-    """
-    Return a resource finder for a package.
-    :param package: The name of the package.
-    :return: A :class:`ResourceFinder` instance for the package.
-    """
-    if package in _finder_cache:
-        result = _finder_cache[package]
-    else:
-        if package not in sys.modules:
-            __import__(package)
-        module = sys.modules[package]
-        path = getattr(module, '__path__', None)
-        if path is None:
-            raise DistlibException('You cannot get a finder for a module, '
-                                   'only for a package')
-        loader = getattr(module, '__loader__', None)
-        finder_maker = _finder_registry.get(type(loader))
-        if finder_maker is None:
-            raise DistlibException('Unable to locate finder for %r' % package)
-        result = finder_maker(module)
-        _finder_cache[package] = result
-    return result
-
-
-_dummy_module = types.ModuleType(str('__dummy__'))
-
-
-def finder_for_path(path):
-    """
-    Return a resource finder for a path, which should represent a container.
-
-    :param path: The path.
-    :return: A :class:`ResourceFinder` instance for the path.
-    """
-    result = None
-    # calls any path hooks, gets importer into cache
-    pkgutil.get_importer(path)
-    loader = sys.path_importer_cache.get(path)
-    finder = _finder_registry.get(type(loader))
-    if finder:
-        module = _dummy_module
-        module.__file__ = os.path.join(path, '')
-        module.__loader__ = loader
-        result = finder(module)
-    return result
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/scripts.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/scripts.py
deleted file mode 100644
index 8e22cb9..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/scripts.py
+++ /dev/null
@@ -1,417 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-# Copyright (C) 2013-2015 Vinay Sajip.
-# Licensed to the Python Software Foundation under a contributor agreement.
-# See LICENSE.txt and CONTRIBUTORS.txt.
-#
-from io import BytesIO
-import logging
-import os
-import re
-import struct
-import sys
-
-from .compat import sysconfig, detect_encoding, ZipFile
-from .resources import finder
-from .util import (FileOperator, get_export_entry, convert_path,
-                   get_executable, in_venv)
-
-logger = logging.getLogger(__name__)
-
-_DEFAULT_MANIFEST = '''
-<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
-<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
- <assemblyIdentity version="1.0.0.0"
- processorArchitecture="X86"
- name="%s"
- type="win32"/>
-
- <!-- Identify the application security requirements. -->
- <trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
- <security>
- <requestedPrivileges>
- <requestedExecutionLevel level="asInvoker" uiAccess="false"/>
- </requestedPrivileges>
- </security>
- </trustInfo>
-</assembly>'''.strip()
-
-# check if Python is called on the first line with this expression
-FIRST_LINE_RE = re.compile(b'^#!.*pythonw?[0-9.]*([ \t].*)?$')
-SCRIPT_TEMPLATE = r'''# -*- coding: utf-8 -*-
-if __name__ == '__main__':
-    import sys, re
-
-    def _resolve(module, func):
-        __import__(module)
-        mod = sys.modules[module]
-        parts = func.split('.')
-        result = getattr(mod, parts.pop(0))
-        for p in parts:
-            result = getattr(result, p)
-        return result
-
-    try:
-        sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
-
-        func = _resolve('%(module)s', '%(func)s')
-        rc = func() # None interpreted as 0
-    except Exception as e:  # only supporting Python >= 2.6
-        sys.stderr.write('%%s\n' %% e)
-        rc = 1
-    sys.exit(rc)
-'''
-
-
-def _enquote_executable(executable):
-    if ' ' in executable:
-        # make sure we quote only the executable in case of env
-        # for example /usr/bin/env "/dir with spaces/bin/jython"
-        # instead of "/usr/bin/env /dir with spaces/bin/jython"
-        # otherwise whole
-        if executable.startswith('/usr/bin/env '):
-            env, _executable = executable.split(' ', 1)
-            if ' ' in _executable and not _executable.startswith('"'):
-                executable = '%s "%s"' % (env, _executable)
-        else:
-            if not executable.startswith('"'):
-                executable = '"%s"' % executable
-    return executable
-
-
-class ScriptMaker(object):
-    """
-    A class to copy or create scripts from source scripts or callable
-    specifications.
-    """
-    script_template = SCRIPT_TEMPLATE
-
-    executable = None  # for shebangs
-
-    def __init__(self, source_dir, target_dir, add_launchers=True,
-                 dry_run=False, fileop=None):
-        self.source_dir = source_dir
-        self.target_dir = target_dir
-        self.add_launchers = add_launchers
-        self.force = False
-        self.clobber = False
-        # It only makes sense to set mode bits on POSIX.
-        self.set_mode = (os.name == 'posix') or (os.name == 'java' and
-                                                 os._name == 'posix')
-        self.variants = set(('', 'X.Y'))
-        self._fileop = fileop or FileOperator(dry_run)
-
-        self._is_nt = os.name == 'nt' or (
-            os.name == 'java' and os._name == 'nt')
-
-    def _get_alternate_executable(self, executable, options):
-        if options.get('gui', False) and self._is_nt:  # pragma: no cover
-            dn, fn = os.path.split(executable)
-            fn = fn.replace('python', 'pythonw')
-            executable = os.path.join(dn, fn)
-        return executable
-
-    if sys.platform.startswith('java'):  # pragma: no cover
-        def _is_shell(self, executable):
-            """
-            Determine if the specified executable is a script
-            (contains a #! line)
-            """
-            try:
-                with open(executable) as fp:
-                    return fp.read(2) == '#!'
-            except (OSError, IOError):
-                logger.warning('Failed to open %s', executable)
-                return False
-
-        def _fix_jython_executable(self, executable):
-            if self._is_shell(executable):
-                # Workaround for Jython is not needed on Linux systems.
-                import java
-
-                if java.lang.System.getProperty('os.name') == 'Linux':
-                    return executable
-            elif executable.lower().endswith('jython.exe'):
-                # Use wrapper exe for Jython on Windows
-                return executable
-            return '/usr/bin/env %s' % executable
-
-    def _build_shebang(self, executable, post_interp):
-        """
-        Build a shebang line. In the simple case (on Windows, or a shebang line
-        which is not too long or contains spaces) use a simple formulation for
-        the shebang. Otherwise, use /bin/sh as the executable, with a contrived
-        shebang which allows the script to run either under Python or sh, using
-        suitable quoting. Thanks to Harald Nordgren for his input.
-
-        See also: http://www.in-ulm.de/~mascheck/various/shebang/#length
-                  https://hg.mozilla.org/mozilla-central/file/tip/mach
-        """
-        if os.name != 'posix':
-            simple_shebang = True
-        else:
-            # Add 3 for '#!' prefix and newline suffix.
-            shebang_length = len(executable) + len(post_interp) + 3
-            if sys.platform == 'darwin':
-                max_shebang_length = 512
-            else:
-                max_shebang_length = 127
-            simple_shebang = ((b' ' not in executable) and
-                              (shebang_length <= max_shebang_length))
-
-        if simple_shebang:
-            result = b'#!' + executable + post_interp + b'\n'
-        else:
-            result = b'#!/bin/sh\n'
-            result += b"'''exec' " + executable + post_interp + b' "$0" "$@"\n'
-            result += b"' '''"
-        return result
-
-    def _get_shebang(self, encoding, post_interp=b'', options=None):
-        enquote = True
-        if self.executable:
-            executable = self.executable
-            enquote = False     # assume this will be taken care of
-        elif not sysconfig.is_python_build():
-            executable = get_executable()
-        elif in_venv():  # pragma: no cover
-            executable = os.path.join(sysconfig.get_path('scripts'),
-                            'python%s' % sysconfig.get_config_var('EXE'))
-        else:  # pragma: no cover
-            executable = os.path.join(
-                sysconfig.get_config_var('BINDIR'),
-               'python%s%s' % (sysconfig.get_config_var('VERSION'),
-                               sysconfig.get_config_var('EXE')))
-        if options:
-            executable = self._get_alternate_executable(executable, options)
-
-        if sys.platform.startswith('java'):  # pragma: no cover
-            executable = self._fix_jython_executable(executable)
-        # Normalise case for Windows
-        executable = os.path.normcase(executable)
-        # If the user didn't specify an executable, it may be necessary to
-        # cater for executable paths with spaces (not uncommon on Windows)
-        if enquote:
-            executable = _enquote_executable(executable)
-        # Issue #51: don't use fsencode, since we later try to
-        # check that the shebang is decodable using utf-8.
-        executable = executable.encode('utf-8')
-        # in case of IronPython, play safe and enable frames support
-        if (sys.platform == 'cli' and '-X:Frames' not in post_interp
-            and '-X:FullFrames' not in post_interp):  # pragma: no cover
-            post_interp += b' -X:Frames'
-        shebang = self._build_shebang(executable, post_interp)
-        # Python parser starts to read a script using UTF-8 until
-        # it gets a #coding:xxx cookie. The shebang has to be the
-        # first line of a file, the #coding:xxx cookie cannot be
-        # written before. So the shebang has to be decodable from
-        # UTF-8.
-        try:
-            shebang.decode('utf-8')
-        except UnicodeDecodeError:  # pragma: no cover
-            raise ValueError(
-                'The shebang (%r) is not decodable from utf-8' % shebang)
-        # If the script is encoded to a custom encoding (use a
-        # #coding:xxx cookie), the shebang has to be decodable from
-        # the script encoding too.
-        if encoding != 'utf-8':
-            try:
-                shebang.decode(encoding)
-            except UnicodeDecodeError:  # pragma: no cover
-                raise ValueError(
-                    'The shebang (%r) is not decodable '
-                    'from the script encoding (%r)' % (shebang, encoding))
-        return shebang
-
-    def _get_script_text(self, entry):
-        return self.script_template % dict(module=entry.prefix,
-                                           func=entry.suffix)
-
-    manifest = _DEFAULT_MANIFEST
-
-    def get_manifest(self, exename):
-        base = os.path.basename(exename)
-        return self.manifest % base
-
-    def _write_script(self, names, shebang, script_bytes, filenames, ext):
-        use_launcher = self.add_launchers and self._is_nt
-        linesep = os.linesep.encode('utf-8')
-        if not shebang.endswith(linesep):
-            shebang += linesep
-        if not use_launcher:
-            script_bytes = shebang + script_bytes
-        else:  # pragma: no cover
-            if ext == 'py':
-                launcher = self._get_launcher('t')
-            else:
-                launcher = self._get_launcher('w')
-            stream = BytesIO()
-            with ZipFile(stream, 'w') as zf:
-                zf.writestr('__main__.py', script_bytes)
-            zip_data = stream.getvalue()
-            script_bytes = launcher + shebang + zip_data
-        for name in names:
-            outname = os.path.join(self.target_dir, name)
-            if use_launcher:  # pragma: no cover
-                n, e = os.path.splitext(outname)
-                if e.startswith('.py'):
-                    outname = n
-                outname = '%s.exe' % outname
-                try:
-                    self._fileop.write_binary_file(outname, script_bytes)
-                except Exception:
-                    # Failed writing an executable - it might be in use.
-                    logger.warning('Failed to write executable - trying to '
-                                   'use .deleteme logic')
-                    dfname = '%s.deleteme' % outname
-                    if os.path.exists(dfname):
-                        os.remove(dfname)       # Not allowed to fail here
-                    os.rename(outname, dfname)  # nor here
-                    self._fileop.write_binary_file(outname, script_bytes)
-                    logger.debug('Able to replace executable using '
-                                 '.deleteme logic')
-                    try:
-                        os.remove(dfname)
-                    except Exception:
-                        pass    # still in use - ignore error
-            else:
-                if self._is_nt and not outname.endswith('.' + ext):  # pragma: no cover
-                    outname = '%s.%s' % (outname, ext)
-                if os.path.exists(outname) and not self.clobber:
-                    logger.warning('Skipping existing file %s', outname)
-                    continue
-                self._fileop.write_binary_file(outname, script_bytes)
-                if self.set_mode:
-                    self._fileop.set_executable_mode([outname])
-            filenames.append(outname)
-
-    def _make_script(self, entry, filenames, options=None):
-        post_interp = b''
-        if options:
-            args = options.get('interpreter_args', [])
-            if args:
-                args = ' %s' % ' '.join(args)
-                post_interp = args.encode('utf-8')
-        shebang = self._get_shebang('utf-8', post_interp, options=options)
-        script = self._get_script_text(entry).encode('utf-8')
-        name = entry.name
-        scriptnames = set()
-        if '' in self.variants:
-            scriptnames.add(name)
-        if 'X' in self.variants:
-            scriptnames.add('%s%s' % (name, sys.version[0]))
-        if 'X.Y' in self.variants:
-            scriptnames.add('%s-%s' % (name, sys.version[:3]))
-        if options and options.get('gui', False):
-            ext = 'pyw'
-        else:
-            ext = 'py'
-        self._write_script(scriptnames, shebang, script, filenames, ext)
-
-    def _copy_script(self, script, filenames):
-        adjust = False
-        script = os.path.join(self.source_dir, convert_path(script))
-        outname = os.path.join(self.target_dir, os.path.basename(script))
-        if not self.force and not self._fileop.newer(script, outname):
-            logger.debug('not copying %s (up-to-date)', script)
-            return
-
-        # Always open the file, but ignore failures in dry-run mode --
-        # that way, we'll get accurate feedback if we can read the
-        # script.
-        try:
-            f = open(script, 'rb')
-        except IOError:  # pragma: no cover
-            if not self.dry_run:
-                raise
-            f = None
-        else:
-            first_line = f.readline()
-            if not first_line:  # pragma: no cover
-                logger.warning('%s: %s is an empty file (skipping)',
-                               self.get_command_name(),  script)
-                return
-
-            match = FIRST_LINE_RE.match(first_line.replace(b'\r\n', b'\n'))
-            if match:
-                adjust = True
-                post_interp = match.group(1) or b''
-
-        if not adjust:
-            if f:
-                f.close()
-            self._fileop.copy_file(script, outname)
-            if self.set_mode:
-                self._fileop.set_executable_mode([outname])
-            filenames.append(outname)
-        else:
-            logger.info('copying and adjusting %s -> %s', script,
-                        self.target_dir)
-            if not self._fileop.dry_run:
-                encoding, lines = detect_encoding(f.readline)
-                f.seek(0)
-                shebang = self._get_shebang(encoding, post_interp)
-                if b'pythonw' in first_line:  # pragma: no cover
-                    ext = 'pyw'
-                else:
-                    ext = 'py'
-                n = os.path.basename(outname)
-                self._write_script([n], shebang, f.read(), filenames, ext)
-            if f:
-                f.close()
-
-    @property
-    def dry_run(self):
-        return self._fileop.dry_run
-
-    @dry_run.setter
-    def dry_run(self, value):
-        self._fileop.dry_run = value
-
-    if os.name == 'nt' or (os.name == 'java' and os._name == 'nt'):  # pragma: no cover
-        # Executable launcher support.
-        # Launchers are from https://bitbucket.org/vinay.sajip/simple_launcher/
-
-        def _get_launcher(self, kind):
-            if struct.calcsize('P') == 8:   # 64-bit
-                bits = '64'
-            else:
-                bits = '32'
-            name = '%s%s.exe' % (kind, bits)
-            # Issue 31: don't hardcode an absolute package name, but
-            # determine it relative to the current package
-            distlib_package = __name__.rsplit('.', 1)[0]
-            result = finder(distlib_package).find(name).bytes
-            return result
-
-    # Public API follows
-
-    def make(self, specification, options=None):
-        """
-        Make a script.
-
-        :param specification: The specification, which is either a valid export
-                              entry specification (to make a script from a
-                              callable) or a filename (to make a script by
-                              copying from a source location).
-        :param options: A dictionary of options controlling script generation.
-        :return: A list of all absolute pathnames written to.
-        """
-        filenames = []
-        entry = get_export_entry(specification)
-        if entry is None:
-            self._copy_script(specification, filenames)
-        else:
-            self._make_script(entry, filenames, options=options)
-        return filenames
-
-    def make_multiple(self, specifications, options=None):
-        """
-        Take a list of specifications and make scripts from them,
-        :param specifications: A list of specifications.
-        :return: A list of all absolute pathnames written to,
-        """
-        filenames = []
-        for specification in specifications:
-            filenames.extend(self.make(specification, options))
-        return filenames
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/t32.exe b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/t32.exe
deleted file mode 100644
index a09d926..0000000
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diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/t64.exe b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/t64.exe
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diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/util.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/util.py
deleted file mode 100644
index 9d4bfd3..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/util.py
+++ /dev/null
@@ -1,1756 +0,0 @@
-#
-# Copyright (C) 2012-2017 The Python Software Foundation.
-# See LICENSE.txt and CONTRIBUTORS.txt.
-#
-import codecs
-from collections import deque
-import contextlib
-import csv
-from glob import iglob as std_iglob
-import io
-import json
-import logging
-import os
-import py_compile
-import re
-import socket
-try:
-    import ssl
-except ImportError:  # pragma: no cover
-    ssl = None
-import subprocess
-import sys
-import tarfile
-import tempfile
-import textwrap
-
-try:
-    import threading
-except ImportError:  # pragma: no cover
-    import dummy_threading as threading
-import time
-
-from . import DistlibException
-from .compat import (string_types, text_type, shutil, raw_input, StringIO,
-                     cache_from_source, urlopen, urljoin, httplib, xmlrpclib,
-                     splittype, HTTPHandler, BaseConfigurator, valid_ident,
-                     Container, configparser, URLError, ZipFile, fsdecode,
-                     unquote, urlparse)
-
-logger = logging.getLogger(__name__)
-
-#
-# Requirement parsing code as per PEP 508
-#
-
-IDENTIFIER = re.compile(r'^([\w\.-]+)\s*')
-VERSION_IDENTIFIER = re.compile(r'^([\w\.*+-]+)\s*')
-COMPARE_OP = re.compile(r'^(<=?|>=?|={2,3}|[~!]=)\s*')
-MARKER_OP = re.compile(r'^((<=?)|(>=?)|={2,3}|[~!]=|in|not\s+in)\s*')
-OR = re.compile(r'^or\b\s*')
-AND = re.compile(r'^and\b\s*')
-NON_SPACE = re.compile(r'(\S+)\s*')
-STRING_CHUNK = re.compile(r'([\s\w\.{}()*+#:;,/?!~`@$%^&=|<>\[\]-]+)')
-
-
-def parse_marker(marker_string):
-    """
-    Parse a marker string and return a dictionary containing a marker expression.
-
-    The dictionary will contain keys "op", "lhs" and "rhs" for non-terminals in
-    the expression grammar, or strings. A string contained in quotes is to be
-    interpreted as a literal string, and a string not contained in quotes is a
-    variable (such as os_name).
-    """
-    def marker_var(remaining):
-        # either identifier, or literal string
-        m = IDENTIFIER.match(remaining)
-        if m:
-            result = m.groups()[0]
-            remaining = remaining[m.end():]
-        elif not remaining:
-            raise SyntaxError('unexpected end of input')
-        else:
-            q = remaining[0]
-            if q not in '\'"':
-                raise SyntaxError('invalid expression: %s' % remaining)
-            oq = '\'"'.replace(q, '')
-            remaining = remaining[1:]
-            parts = [q]
-            while remaining:
-                # either a string chunk, or oq, or q to terminate
-                if remaining[0] == q:
-                    break
-                elif remaining[0] == oq:
-                    parts.append(oq)
-                    remaining = remaining[1:]
-                else:
-                    m = STRING_CHUNK.match(remaining)
-                    if not m:
-                        raise SyntaxError('error in string literal: %s' % remaining)
-                    parts.append(m.groups()[0])
-                    remaining = remaining[m.end():]
-            else:
-                s = ''.join(parts)
-                raise SyntaxError('unterminated string: %s' % s)
-            parts.append(q)
-            result = ''.join(parts)
-            remaining = remaining[1:].lstrip() # skip past closing quote
-        return result, remaining
-
-    def marker_expr(remaining):
-        if remaining and remaining[0] == '(':
-            result, remaining = marker(remaining[1:].lstrip())
-            if remaining[0] != ')':
-                raise SyntaxError('unterminated parenthesis: %s' % remaining)
-            remaining = remaining[1:].lstrip()
-        else:
-            lhs, remaining = marker_var(remaining)
-            while remaining:
-                m = MARKER_OP.match(remaining)
-                if not m:
-                    break
-                op = m.groups()[0]
-                remaining = remaining[m.end():]
-                rhs, remaining = marker_var(remaining)
-                lhs = {'op': op, 'lhs': lhs, 'rhs': rhs}
-            result = lhs
-        return result, remaining
-
-    def marker_and(remaining):
-        lhs, remaining = marker_expr(remaining)
-        while remaining:
-            m = AND.match(remaining)
-            if not m:
-                break
-            remaining = remaining[m.end():]
-            rhs, remaining = marker_expr(remaining)
-            lhs = {'op': 'and', 'lhs': lhs, 'rhs': rhs}
-        return lhs, remaining
-
-    def marker(remaining):
-        lhs, remaining = marker_and(remaining)
-        while remaining:
-            m = OR.match(remaining)
-            if not m:
-                break
-            remaining = remaining[m.end():]
-            rhs, remaining = marker_and(remaining)
-            lhs = {'op': 'or', 'lhs': lhs, 'rhs': rhs}
-        return lhs, remaining
-
-    return marker(marker_string)
-
-
-def parse_requirement(req):
-    """
-    Parse a requirement passed in as a string. Return a Container
-    whose attributes contain the various parts of the requirement.
-    """
-    remaining = req.strip()
-    if not remaining or remaining.startswith('#'):
-        return None
-    m = IDENTIFIER.match(remaining)
-    if not m:
-        raise SyntaxError('name expected: %s' % remaining)
-    distname = m.groups()[0]
-    remaining = remaining[m.end():]
-    extras = mark_expr = versions = uri = None
-    if remaining and remaining[0] == '[':
-        i = remaining.find(']', 1)
-        if i < 0:
-            raise SyntaxError('unterminated extra: %s' % remaining)
-        s = remaining[1:i]
-        remaining = remaining[i + 1:].lstrip()
-        extras = []
-        while s:
-            m = IDENTIFIER.match(s)
-            if not m:
-                raise SyntaxError('malformed extra: %s' % s)
-            extras.append(m.groups()[0])
-            s = s[m.end():]
-            if not s:
-                break
-            if s[0] != ',':
-                raise SyntaxError('comma expected in extras: %s' % s)
-            s = s[1:].lstrip()
-        if not extras:
-            extras = None
-    if remaining:
-        if remaining[0] == '@':
-            # it's a URI
-            remaining = remaining[1:].lstrip()
-            m = NON_SPACE.match(remaining)
-            if not m:
-                raise SyntaxError('invalid URI: %s' % remaining)
-            uri = m.groups()[0]
-            t = urlparse(uri)
-            # there are issues with Python and URL parsing, so this test
-            # is a bit crude. See bpo-20271, bpo-23505. Python doesn't
-            # always parse invalid URLs correctly - it should raise
-            # exceptions for malformed URLs
-            if not (t.scheme and t.netloc):
-                raise SyntaxError('Invalid URL: %s' % uri)
-            remaining = remaining[m.end():].lstrip()
-        else:
-
-            def get_versions(ver_remaining):
-                """
-                Return a list of operator, version tuples if any are
-                specified, else None.
-                """
-                m = COMPARE_OP.match(ver_remaining)
-                versions = None
-                if m:
-                    versions = []
-                    while True:
-                        op = m.groups()[0]
-                        ver_remaining = ver_remaining[m.end():]
-                        m = VERSION_IDENTIFIER.match(ver_remaining)
-                        if not m:
-                            raise SyntaxError('invalid version: %s' % ver_remaining)
-                        v = m.groups()[0]
-                        versions.append((op, v))
-                        ver_remaining = ver_remaining[m.end():]
-                        if not ver_remaining or ver_remaining[0] != ',':
-                            break
-                        ver_remaining = ver_remaining[1:].lstrip()
-                        m = COMPARE_OP.match(ver_remaining)
-                        if not m:
-                            raise SyntaxError('invalid constraint: %s' % ver_remaining)
-                    if not versions:
-                        versions = None
-                return versions, ver_remaining
-
-            if remaining[0] != '(':
-                versions, remaining = get_versions(remaining)
-            else:
-                i = remaining.find(')', 1)
-                if i < 0:
-                    raise SyntaxError('unterminated parenthesis: %s' % remaining)
-                s = remaining[1:i]
-                remaining = remaining[i + 1:].lstrip()
-                # As a special diversion from PEP 508, allow a version number
-                # a.b.c in parentheses as a synonym for ~= a.b.c (because this
-                # is allowed in earlier PEPs)
-                if COMPARE_OP.match(s):
-                    versions, _ = get_versions(s)
-                else:
-                    m = VERSION_IDENTIFIER.match(s)
-                    if not m:
-                        raise SyntaxError('invalid constraint: %s' % s)
-                    v = m.groups()[0]
-                    s = s[m.end():].lstrip()
-                    if s:
-                        raise SyntaxError('invalid constraint: %s' % s)
-                    versions = [('~=', v)]
-
-    if remaining:
-        if remaining[0] != ';':
-            raise SyntaxError('invalid requirement: %s' % remaining)
-        remaining = remaining[1:].lstrip()
-
-        mark_expr, remaining = parse_marker(remaining)
-
-    if remaining and remaining[0] != '#':
-        raise SyntaxError('unexpected trailing data: %s' % remaining)
-
-    if not versions:
-        rs = distname
-    else:
-        rs = '%s %s' % (distname, ', '.join(['%s %s' % con for con in versions]))
-    return Container(name=distname, extras=extras, constraints=versions,
-                     marker=mark_expr, url=uri, requirement=rs)
-
-
-def get_resources_dests(resources_root, rules):
-    """Find destinations for resources files"""
-
-    def get_rel_path(root, path):
-        # normalizes and returns a lstripped-/-separated path
-        root = root.replace(os.path.sep, '/')
-        path = path.replace(os.path.sep, '/')
-        assert path.startswith(root)
-        return path[len(root):].lstrip('/')
-
-    destinations = {}
-    for base, suffix, dest in rules:
-        prefix = os.path.join(resources_root, base)
-        for abs_base in iglob(prefix):
-            abs_glob = os.path.join(abs_base, suffix)
-            for abs_path in iglob(abs_glob):
-                resource_file = get_rel_path(resources_root, abs_path)
-                if dest is None:  # remove the entry if it was here
-                    destinations.pop(resource_file, None)
-                else:
-                    rel_path = get_rel_path(abs_base, abs_path)
-                    rel_dest = dest.replace(os.path.sep, '/').rstrip('/')
-                    destinations[resource_file] = rel_dest + '/' + rel_path
-    return destinations
-
-
-def in_venv():
-    if hasattr(sys, 'real_prefix'):
-        # virtualenv venvs
-        result = True
-    else:
-        # PEP 405 venvs
-        result = sys.prefix != getattr(sys, 'base_prefix', sys.prefix)
-    return result
-
-
-def get_executable():
-# The __PYVENV_LAUNCHER__ dance is apparently no longer needed, as
-# changes to the stub launcher mean that sys.executable always points
-# to the stub on OS X
-#    if sys.platform == 'darwin' and ('__PYVENV_LAUNCHER__'
-#                                     in os.environ):
-#        result =  os.environ['__PYVENV_LAUNCHER__']
-#    else:
-#        result = sys.executable
-#    return result
-    result = os.path.normcase(sys.executable)
-    if not isinstance(result, text_type):
-        result = fsdecode(result)
-    return result
-
-
-def proceed(prompt, allowed_chars, error_prompt=None, default=None):
-    p = prompt
-    while True:
-        s = raw_input(p)
-        p = prompt
-        if not s and default:
-            s = default
-        if s:
-            c = s[0].lower()
-            if c in allowed_chars:
-                break
-            if error_prompt:
-                p = '%c: %s\n%s' % (c, error_prompt, prompt)
-    return c
-
-
-def extract_by_key(d, keys):
-    if isinstance(keys, string_types):
-        keys = keys.split()
-    result = {}
-    for key in keys:
-        if key in d:
-            result[key] = d[key]
-    return result
-
-def read_exports(stream):
-    if sys.version_info[0] >= 3:
-        # needs to be a text stream
-        stream = codecs.getreader('utf-8')(stream)
-    # Try to load as JSON, falling back on legacy format
-    data = stream.read()
-    stream = StringIO(data)
-    try:
-        jdata = json.load(stream)
-        result = jdata['extensions']['python.exports']['exports']
-        for group, entries in result.items():
-            for k, v in entries.items():
-                s = '%s = %s' % (k, v)
-                entry = get_export_entry(s)
-                assert entry is not None
-                entries[k] = entry
-        return result
-    except Exception:
-        stream.seek(0, 0)
-
-    def read_stream(cp, stream):
-        if hasattr(cp, 'read_file'):
-            cp.read_file(stream)
-        else:
-            cp.readfp(stream)
-
-    cp = configparser.ConfigParser()
-    try:
-        read_stream(cp, stream)
-    except configparser.MissingSectionHeaderError:
-        stream.close()
-        data = textwrap.dedent(data)
-        stream = StringIO(data)
-        read_stream(cp, stream)
-
-    result = {}
-    for key in cp.sections():
-        result[key] = entries = {}
-        for name, value in cp.items(key):
-            s = '%s = %s' % (name, value)
-            entry = get_export_entry(s)
-            assert entry is not None
-            #entry.dist = self
-            entries[name] = entry
-    return result
-
-
-def write_exports(exports, stream):
-    if sys.version_info[0] >= 3:
-        # needs to be a text stream
-        stream = codecs.getwriter('utf-8')(stream)
-    cp = configparser.ConfigParser()
-    for k, v in exports.items():
-        # TODO check k, v for valid values
-        cp.add_section(k)
-        for entry in v.values():
-            if entry.suffix is None:
-                s = entry.prefix
-            else:
-                s = '%s:%s' % (entry.prefix, entry.suffix)
-            if entry.flags:
-                s = '%s [%s]' % (s, ', '.join(entry.flags))
-            cp.set(k, entry.name, s)
-    cp.write(stream)
-
-
-@contextlib.contextmanager
-def tempdir():
-    td = tempfile.mkdtemp()
-    try:
-        yield td
-    finally:
-        shutil.rmtree(td)
-
-@contextlib.contextmanager
-def chdir(d):
-    cwd = os.getcwd()
-    try:
-        os.chdir(d)
-        yield
-    finally:
-        os.chdir(cwd)
-
-
-@contextlib.contextmanager
-def socket_timeout(seconds=15):
-    cto = socket.getdefaulttimeout()
-    try:
-        socket.setdefaulttimeout(seconds)
-        yield
-    finally:
-        socket.setdefaulttimeout(cto)
-
-
-class cached_property(object):
-    def __init__(self, func):
-        self.func = func
-        #for attr in ('__name__', '__module__', '__doc__'):
-        #    setattr(self, attr, getattr(func, attr, None))
-
-    def __get__(self, obj, cls=None):
-        if obj is None:
-            return self
-        value = self.func(obj)
-        object.__setattr__(obj, self.func.__name__, value)
-        #obj.__dict__[self.func.__name__] = value = self.func(obj)
-        return value
-
-def convert_path(pathname):
-    """Return 'pathname' as a name that will work on the native filesystem.
-
-    The path is split on '/' and put back together again using the current
-    directory separator.  Needed because filenames in the setup script are
-    always supplied in Unix style, and have to be converted to the local
-    convention before we can actually use them in the filesystem.  Raises
-    ValueError on non-Unix-ish systems if 'pathname' either starts or
-    ends with a slash.
-    """
-    if os.sep == '/':
-        return pathname
-    if not pathname:
-        return pathname
-    if pathname[0] == '/':
-        raise ValueError("path '%s' cannot be absolute" % pathname)
-    if pathname[-1] == '/':
-        raise ValueError("path '%s' cannot end with '/'" % pathname)
-
-    paths = pathname.split('/')
-    while os.curdir in paths:
-        paths.remove(os.curdir)
-    if not paths:
-        return os.curdir
-    return os.path.join(*paths)
-
-
-class FileOperator(object):
-    def __init__(self, dry_run=False):
-        self.dry_run = dry_run
-        self.ensured = set()
-        self._init_record()
-
-    def _init_record(self):
-        self.record = False
-        self.files_written = set()
-        self.dirs_created = set()
-
-    def record_as_written(self, path):
-        if self.record:
-            self.files_written.add(path)
-
-    def newer(self, source, target):
-        """Tell if the target is newer than the source.
-
-        Returns true if 'source' exists and is more recently modified than
-        'target', or if 'source' exists and 'target' doesn't.
-
-        Returns false if both exist and 'target' is the same age or younger
-        than 'source'. Raise PackagingFileError if 'source' does not exist.
-
-        Note that this test is not very accurate: files created in the same
-        second will have the same "age".
-        """
-        if not os.path.exists(source):
-            raise DistlibException("file '%r' does not exist" %
-                                   os.path.abspath(source))
-        if not os.path.exists(target):
-            return True
-
-        return os.stat(source).st_mtime > os.stat(target).st_mtime
-
-    def copy_file(self, infile, outfile, check=True):
-        """Copy a file respecting dry-run and force flags.
-        """
-        self.ensure_dir(os.path.dirname(outfile))
-        logger.info('Copying %s to %s', infile, outfile)
-        if not self.dry_run:
-            msg = None
-            if check:
-                if os.path.islink(outfile):
-                    msg = '%s is a symlink' % outfile
-                elif os.path.exists(outfile) and not os.path.isfile(outfile):
-                    msg = '%s is a non-regular file' % outfile
-            if msg:
-                raise ValueError(msg + ' which would be overwritten')
-            shutil.copyfile(infile, outfile)
-        self.record_as_written(outfile)
-
-    def copy_stream(self, instream, outfile, encoding=None):
-        assert not os.path.isdir(outfile)
-        self.ensure_dir(os.path.dirname(outfile))
-        logger.info('Copying stream %s to %s', instream, outfile)
-        if not self.dry_run:
-            if encoding is None:
-                outstream = open(outfile, 'wb')
-            else:
-                outstream = codecs.open(outfile, 'w', encoding=encoding)
-            try:
-                shutil.copyfileobj(instream, outstream)
-            finally:
-                outstream.close()
-        self.record_as_written(outfile)
-
-    def write_binary_file(self, path, data):
-        self.ensure_dir(os.path.dirname(path))
-        if not self.dry_run:
-            if os.path.exists(path):
-                os.remove(path)
-            with open(path, 'wb') as f:
-                f.write(data)
-        self.record_as_written(path)
-
-    def write_text_file(self, path, data, encoding):
-        self.write_binary_file(path, data.encode(encoding))
-
-    def set_mode(self, bits, mask, files):
-        if os.name == 'posix' or (os.name == 'java' and os._name == 'posix'):
-            # Set the executable bits (owner, group, and world) on
-            # all the files specified.
-            for f in files:
-                if self.dry_run:
-                    logger.info("changing mode of %s", f)
-                else:
-                    mode = (os.stat(f).st_mode | bits) & mask
-                    logger.info("changing mode of %s to %o", f, mode)
-                    os.chmod(f, mode)
-
-    set_executable_mode = lambda s, f: s.set_mode(0o555, 0o7777, f)
-
-    def ensure_dir(self, path):
-        path = os.path.abspath(path)
-        if path not in self.ensured and not os.path.exists(path):
-            self.ensured.add(path)
-            d, f = os.path.split(path)
-            self.ensure_dir(d)
-            logger.info('Creating %s' % path)
-            if not self.dry_run:
-                os.mkdir(path)
-            if self.record:
-                self.dirs_created.add(path)
-
-    def byte_compile(self, path, optimize=False, force=False, prefix=None, hashed_invalidation=False):
-        dpath = cache_from_source(path, not optimize)
-        logger.info('Byte-compiling %s to %s', path, dpath)
-        if not self.dry_run:
-            if force or self.newer(path, dpath):
-                if not prefix:
-                    diagpath = None
-                else:
-                    assert path.startswith(prefix)
-                    diagpath = path[len(prefix):]
-            compile_kwargs = {}
-            if hashed_invalidation and hasattr(py_compile, 'PycInvalidationMode'):
-                compile_kwargs['invalidation_mode'] = py_compile.PycInvalidationMode.CHECKED_HASH
-            py_compile.compile(path, dpath, diagpath, True, **compile_kwargs)     # raise error
-        self.record_as_written(dpath)
-        return dpath
-
-    def ensure_removed(self, path):
-        if os.path.exists(path):
-            if os.path.isdir(path) and not os.path.islink(path):
-                logger.debug('Removing directory tree at %s', path)
-                if not self.dry_run:
-                    shutil.rmtree(path)
-                if self.record:
-                    if path in self.dirs_created:
-                        self.dirs_created.remove(path)
-            else:
-                if os.path.islink(path):
-                    s = 'link'
-                else:
-                    s = 'file'
-                logger.debug('Removing %s %s', s, path)
-                if not self.dry_run:
-                    os.remove(path)
-                if self.record:
-                    if path in self.files_written:
-                        self.files_written.remove(path)
-
-    def is_writable(self, path):
-        result = False
-        while not result:
-            if os.path.exists(path):
-                result = os.access(path, os.W_OK)
-                break
-            parent = os.path.dirname(path)
-            if parent == path:
-                break
-            path = parent
-        return result
-
-    def commit(self):
-        """
-        Commit recorded changes, turn off recording, return
-        changes.
-        """
-        assert self.record
-        result = self.files_written, self.dirs_created
-        self._init_record()
-        return result
-
-    def rollback(self):
-        if not self.dry_run:
-            for f in list(self.files_written):
-                if os.path.exists(f):
-                    os.remove(f)
-            # dirs should all be empty now, except perhaps for
-            # __pycache__ subdirs
-            # reverse so that subdirs appear before their parents
-            dirs = sorted(self.dirs_created, reverse=True)
-            for d in dirs:
-                flist = os.listdir(d)
-                if flist:
-                    assert flist == ['__pycache__']
-                    sd = os.path.join(d, flist[0])
-                    os.rmdir(sd)
-                os.rmdir(d)     # should fail if non-empty
-        self._init_record()
-
-def resolve(module_name, dotted_path):
-    if module_name in sys.modules:
-        mod = sys.modules[module_name]
-    else:
-        mod = __import__(module_name)
-    if dotted_path is None:
-        result = mod
-    else:
-        parts = dotted_path.split('.')
-        result = getattr(mod, parts.pop(0))
-        for p in parts:
-            result = getattr(result, p)
-    return result
-
-
-class ExportEntry(object):
-    def __init__(self, name, prefix, suffix, flags):
-        self.name = name
-        self.prefix = prefix
-        self.suffix = suffix
-        self.flags = flags
-
-    @cached_property
-    def value(self):
-        return resolve(self.prefix, self.suffix)
-
-    def __repr__(self):  # pragma: no cover
-        return '<ExportEntry %s = %s:%s %s>' % (self.name, self.prefix,
-                                                self.suffix, self.flags)
-
-    def __eq__(self, other):
-        if not isinstance(other, ExportEntry):
-            result = False
-        else:
-            result = (self.name == other.name and
-                      self.prefix == other.prefix and
-                      self.suffix == other.suffix and
-                      self.flags == other.flags)
-        return result
-
-    __hash__ = object.__hash__
-
-
-ENTRY_RE = re.compile(r'''(?P<name>(\w|[-.+])+)
-                      \s*=\s*(?P<callable>(\w+)([:\.]\w+)*)
-                      \s*(\[\s*(?P<flags>\w+(=\w+)?(,\s*\w+(=\w+)?)*)\s*\])?
-                      ''', re.VERBOSE)
-
-def get_export_entry(specification):
-    m = ENTRY_RE.search(specification)
-    if not m:
-        result = None
-        if '[' in specification or ']' in specification:
-            raise DistlibException("Invalid specification "
-                                   "'%s'" % specification)
-    else:
-        d = m.groupdict()
-        name = d['name']
-        path = d['callable']
-        colons = path.count(':')
-        if colons == 0:
-            prefix, suffix = path, None
-        else:
-            if colons != 1:
-                raise DistlibException("Invalid specification "
-                                       "'%s'" % specification)
-            prefix, suffix = path.split(':')
-        flags = d['flags']
-        if flags is None:
-            if '[' in specification or ']' in specification:
-                raise DistlibException("Invalid specification "
-                                       "'%s'" % specification)
-            flags = []
-        else:
-            flags = [f.strip() for f in flags.split(',')]
-        result = ExportEntry(name, prefix, suffix, flags)
-    return result
-
-
-def get_cache_base(suffix=None):
-    """
-    Return the default base location for distlib caches. If the directory does
-    not exist, it is created. Use the suffix provided for the base directory,
-    and default to '.distlib' if it isn't provided.
-
-    On Windows, if LOCALAPPDATA is defined in the environment, then it is
-    assumed to be a directory, and will be the parent directory of the result.
-    On POSIX, and on Windows if LOCALAPPDATA is not defined, the user's home
-    directory - using os.expanduser('~') - will be the parent directory of
-    the result.
-
-    The result is just the directory '.distlib' in the parent directory as
-    determined above, or with the name specified with ``suffix``.
-    """
-    if suffix is None:
-        suffix = '.distlib'
-    if os.name == 'nt' and 'LOCALAPPDATA' in os.environ:
-        result = os.path.expandvars('$localappdata')
-    else:
-        # Assume posix, or old Windows
-        result = os.path.expanduser('~')
-    # we use 'isdir' instead of 'exists', because we want to
-    # fail if there's a file with that name
-    if os.path.isdir(result):
-        usable = os.access(result, os.W_OK)
-        if not usable:
-            logger.warning('Directory exists but is not writable: %s', result)
-    else:
-        try:
-            os.makedirs(result)
-            usable = True
-        except OSError:
-            logger.warning('Unable to create %s', result, exc_info=True)
-            usable = False
-    if not usable:
-        result = tempfile.mkdtemp()
-        logger.warning('Default location unusable, using %s', result)
-    return os.path.join(result, suffix)
-
-
-def path_to_cache_dir(path):
-    """
-    Convert an absolute path to a directory name for use in a cache.
-
-    The algorithm used is:
-
-    #. On Windows, any ``':'`` in the drive is replaced with ``'---'``.
-    #. Any occurrence of ``os.sep`` is replaced with ``'--'``.
-    #. ``'.cache'`` is appended.
-    """
-    d, p = os.path.splitdrive(os.path.abspath(path))
-    if d:
-        d = d.replace(':', '---')
-    p = p.replace(os.sep, '--')
-    return d + p + '.cache'
-
-
-def ensure_slash(s):
-    if not s.endswith('/'):
-        return s + '/'
-    return s
-
-
-def parse_credentials(netloc):
-    username = password = None
-    if '@' in netloc:
-        prefix, netloc = netloc.split('@', 1)
-        if ':' not in prefix:
-            username = prefix
-        else:
-            username, password = prefix.split(':', 1)
-    return username, password, netloc
-
-
-def get_process_umask():
-    result = os.umask(0o22)
-    os.umask(result)
-    return result
-
-def is_string_sequence(seq):
-    result = True
-    i = None
-    for i, s in enumerate(seq):
-        if not isinstance(s, string_types):
-            result = False
-            break
-    assert i is not None
-    return result
-
-PROJECT_NAME_AND_VERSION = re.compile('([a-z0-9_]+([.-][a-z_][a-z0-9_]*)*)-'
-                                      '([a-z0-9_.+-]+)', re.I)
-PYTHON_VERSION = re.compile(r'-py(\d\.?\d?)')
-
-
-def split_filename(filename, project_name=None):
-    """
-    Extract name, version, python version from a filename (no extension)
-
-    Return name, version, pyver or None
-    """
-    result = None
-    pyver = None
-    filename = unquote(filename).replace(' ', '-')
-    m = PYTHON_VERSION.search(filename)
-    if m:
-        pyver = m.group(1)
-        filename = filename[:m.start()]
-    if project_name and len(filename) > len(project_name) + 1:
-        m = re.match(re.escape(project_name) + r'\b', filename)
-        if m:
-            n = m.end()
-            result = filename[:n], filename[n + 1:], pyver
-    if result is None:
-        m = PROJECT_NAME_AND_VERSION.match(filename)
-        if m:
-            result = m.group(1), m.group(3), pyver
-    return result
-
-# Allow spaces in name because of legacy dists like "Twisted Core"
-NAME_VERSION_RE = re.compile(r'(?P<name>[\w .-]+)\s*'
-                             r'\(\s*(?P<ver>[^\s)]+)\)$')
-
-def parse_name_and_version(p):
-    """
-    A utility method used to get name and version from a string.
-
-    From e.g. a Provides-Dist value.
-
-    :param p: A value in a form 'foo (1.0)'
-    :return: The name and version as a tuple.
-    """
-    m = NAME_VERSION_RE.match(p)
-    if not m:
-        raise DistlibException('Ill-formed name/version string: \'%s\'' % p)
-    d = m.groupdict()
-    return d['name'].strip().lower(), d['ver']
-
-def get_extras(requested, available):
-    result = set()
-    requested = set(requested or [])
-    available = set(available or [])
-    if '*' in requested:
-        requested.remove('*')
-        result |= available
-    for r in requested:
-        if r == '-':
-            result.add(r)
-        elif r.startswith('-'):
-            unwanted = r[1:]
-            if unwanted not in available:
-                logger.warning('undeclared extra: %s' % unwanted)
-            if unwanted in result:
-                result.remove(unwanted)
-        else:
-            if r not in available:
-                logger.warning('undeclared extra: %s' % r)
-            result.add(r)
-    return result
-#
-# Extended metadata functionality
-#
-
-def _get_external_data(url):
-    result = {}
-    try:
-        # urlopen might fail if it runs into redirections,
-        # because of Python issue #13696. Fixed in locators
-        # using a custom redirect handler.
-        resp = urlopen(url)
-        headers = resp.info()
-        ct = headers.get('Content-Type')
-        if not ct.startswith('application/json'):
-            logger.debug('Unexpected response for JSON request: %s', ct)
-        else:
-            reader = codecs.getreader('utf-8')(resp)
-            #data = reader.read().decode('utf-8')
-            #result = json.loads(data)
-            result = json.load(reader)
-    except Exception as e:
-        logger.exception('Failed to get external data for %s: %s', url, e)
-    return result
-
-_external_data_base_url = 'https://www.red-dove.com/pypi/projects/'
-
-def get_project_data(name):
-    url = '%s/%s/project.json' % (name[0].upper(), name)
-    url = urljoin(_external_data_base_url, url)
-    result = _get_external_data(url)
-    return result
-
-def get_package_data(name, version):
-    url = '%s/%s/package-%s.json' % (name[0].upper(), name, version)
-    url = urljoin(_external_data_base_url, url)
-    return _get_external_data(url)
-
-
-class Cache(object):
-    """
-    A class implementing a cache for resources that need to live in the file system
-    e.g. shared libraries. This class was moved from resources to here because it
-    could be used by other modules, e.g. the wheel module.
-    """
-
-    def __init__(self, base):
-        """
-        Initialise an instance.
-
-        :param base: The base directory where the cache should be located.
-        """
-        # we use 'isdir' instead of 'exists', because we want to
-        # fail if there's a file with that name
-        if not os.path.isdir(base):  # pragma: no cover
-            os.makedirs(base)
-        if (os.stat(base).st_mode & 0o77) != 0:
-            logger.warning('Directory \'%s\' is not private', base)
-        self.base = os.path.abspath(os.path.normpath(base))
-
-    def prefix_to_dir(self, prefix):
-        """
-        Converts a resource prefix to a directory name in the cache.
-        """
-        return path_to_cache_dir(prefix)
-
-    def clear(self):
-        """
-        Clear the cache.
-        """
-        not_removed = []
-        for fn in os.listdir(self.base):
-            fn = os.path.join(self.base, fn)
-            try:
-                if os.path.islink(fn) or os.path.isfile(fn):
-                    os.remove(fn)
-                elif os.path.isdir(fn):
-                    shutil.rmtree(fn)
-            except Exception:
-                not_removed.append(fn)
-        return not_removed
-
-
-class EventMixin(object):
-    """
-    A very simple publish/subscribe system.
-    """
-    def __init__(self):
-        self._subscribers = {}
-
-    def add(self, event, subscriber, append=True):
-        """
-        Add a subscriber for an event.
-
-        :param event: The name of an event.
-        :param subscriber: The subscriber to be added (and called when the
-                           event is published).
-        :param append: Whether to append or prepend the subscriber to an
-                       existing subscriber list for the event.
-        """
-        subs = self._subscribers
-        if event not in subs:
-            subs[event] = deque([subscriber])
-        else:
-            sq = subs[event]
-            if append:
-                sq.append(subscriber)
-            else:
-                sq.appendleft(subscriber)
-
-    def remove(self, event, subscriber):
-        """
-        Remove a subscriber for an event.
-
-        :param event: The name of an event.
-        :param subscriber: The subscriber to be removed.
-        """
-        subs = self._subscribers
-        if event not in subs:
-            raise ValueError('No subscribers: %r' % event)
-        subs[event].remove(subscriber)
-
-    def get_subscribers(self, event):
-        """
-        Return an iterator for the subscribers for an event.
-        :param event: The event to return subscribers for.
-        """
-        return iter(self._subscribers.get(event, ()))
-
-    def publish(self, event, *args, **kwargs):
-        """
-        Publish a event and return a list of values returned by its
-        subscribers.
-
-        :param event: The event to publish.
-        :param args: The positional arguments to pass to the event's
-                     subscribers.
-        :param kwargs: The keyword arguments to pass to the event's
-                       subscribers.
-        """
-        result = []
-        for subscriber in self.get_subscribers(event):
-            try:
-                value = subscriber(event, *args, **kwargs)
-            except Exception:
-                logger.exception('Exception during event publication')
-                value = None
-            result.append(value)
-        logger.debug('publish %s: args = %s, kwargs = %s, result = %s',
-                     event, args, kwargs, result)
-        return result
-
-#
-# Simple sequencing
-#
-class Sequencer(object):
-    def __init__(self):
-        self._preds = {}
-        self._succs = {}
-        self._nodes = set()     # nodes with no preds/succs
-
-    def add_node(self, node):
-        self._nodes.add(node)
-
-    def remove_node(self, node, edges=False):
-        if node in self._nodes:
-            self._nodes.remove(node)
-        if edges:
-            for p in set(self._preds.get(node, ())):
-                self.remove(p, node)
-            for s in set(self._succs.get(node, ())):
-                self.remove(node, s)
-            # Remove empties
-            for k, v in list(self._preds.items()):
-                if not v:
-                    del self._preds[k]
-            for k, v in list(self._succs.items()):
-                if not v:
-                    del self._succs[k]
-
-    def add(self, pred, succ):
-        assert pred != succ
-        self._preds.setdefault(succ, set()).add(pred)
-        self._succs.setdefault(pred, set()).add(succ)
-
-    def remove(self, pred, succ):
-        assert pred != succ
-        try:
-            preds = self._preds[succ]
-            succs = self._succs[pred]
-        except KeyError:  # pragma: no cover
-            raise ValueError('%r not a successor of anything' % succ)
-        try:
-            preds.remove(pred)
-            succs.remove(succ)
-        except KeyError:  # pragma: no cover
-            raise ValueError('%r not a successor of %r' % (succ, pred))
-
-    def is_step(self, step):
-        return (step in self._preds or step in self._succs or
-                step in self._nodes)
-
-    def get_steps(self, final):
-        if not self.is_step(final):
-            raise ValueError('Unknown: %r' % final)
-        result = []
-        todo = []
-        seen = set()
-        todo.append(final)
-        while todo:
-            step = todo.pop(0)
-            if step in seen:
-                # if a step was already seen,
-                # move it to the end (so it will appear earlier
-                # when reversed on return) ... but not for the
-                # final step, as that would be confusing for
-                # users
-                if step != final:
-                    result.remove(step)
-                    result.append(step)
-            else:
-                seen.add(step)
-                result.append(step)
-                preds = self._preds.get(step, ())
-                todo.extend(preds)
-        return reversed(result)
-
-    @property
-    def strong_connections(self):
-        #http://en.wikipedia.org/wiki/Tarjan%27s_strongly_connected_components_algorithm
-        index_counter = [0]
-        stack = []
-        lowlinks = {}
-        index = {}
-        result = []
-
-        graph = self._succs
-
-        def strongconnect(node):
-            # set the depth index for this node to the smallest unused index
-            index[node] = index_counter[0]
-            lowlinks[node] = index_counter[0]
-            index_counter[0] += 1
-            stack.append(node)
-
-            # Consider successors
-            try:
-                successors = graph[node]
-            except Exception:
-                successors = []
-            for successor in successors:
-                if successor not in lowlinks:
-                    # Successor has not yet been visited
-                    strongconnect(successor)
-                    lowlinks[node] = min(lowlinks[node],lowlinks[successor])
-                elif successor in stack:
-                    # the successor is in the stack and hence in the current
-                    # strongly connected component (SCC)
-                    lowlinks[node] = min(lowlinks[node],index[successor])
-
-            # If `node` is a root node, pop the stack and generate an SCC
-            if lowlinks[node] == index[node]:
-                connected_component = []
-
-                while True:
-                    successor = stack.pop()
-                    connected_component.append(successor)
-                    if successor == node: break
-                component = tuple(connected_component)
-                # storing the result
-                result.append(component)
-
-        for node in graph:
-            if node not in lowlinks:
-                strongconnect(node)
-
-        return result
-
-    @property
-    def dot(self):
-        result = ['digraph G {']
-        for succ in self._preds:
-            preds = self._preds[succ]
-            for pred in preds:
-                result.append('  %s -> %s;' % (pred, succ))
-        for node in self._nodes:
-            result.append('  %s;' % node)
-        result.append('}')
-        return '\n'.join(result)
-
-#
-# Unarchiving functionality for zip, tar, tgz, tbz, whl
-#
-
-ARCHIVE_EXTENSIONS = ('.tar.gz', '.tar.bz2', '.tar', '.zip',
-                      '.tgz', '.tbz', '.whl')
-
-def unarchive(archive_filename, dest_dir, format=None, check=True):
-
-    def check_path(path):
-        if not isinstance(path, text_type):
-            path = path.decode('utf-8')
-        p = os.path.abspath(os.path.join(dest_dir, path))
-        if not p.startswith(dest_dir) or p[plen] != os.sep:
-            raise ValueError('path outside destination: %r' % p)
-
-    dest_dir = os.path.abspath(dest_dir)
-    plen = len(dest_dir)
-    archive = None
-    if format is None:
-        if archive_filename.endswith(('.zip', '.whl')):
-            format = 'zip'
-        elif archive_filename.endswith(('.tar.gz', '.tgz')):
-            format = 'tgz'
-            mode = 'r:gz'
-        elif archive_filename.endswith(('.tar.bz2', '.tbz')):
-            format = 'tbz'
-            mode = 'r:bz2'
-        elif archive_filename.endswith('.tar'):
-            format = 'tar'
-            mode = 'r'
-        else:  # pragma: no cover
-            raise ValueError('Unknown format for %r' % archive_filename)
-    try:
-        if format == 'zip':
-            archive = ZipFile(archive_filename, 'r')
-            if check:
-                names = archive.namelist()
-                for name in names:
-                    check_path(name)
-        else:
-            archive = tarfile.open(archive_filename, mode)
-            if check:
-                names = archive.getnames()
-                for name in names:
-                    check_path(name)
-        if format != 'zip' and sys.version_info[0] < 3:
-            # See Python issue 17153. If the dest path contains Unicode,
-            # tarfile extraction fails on Python 2.x if a member path name
-            # contains non-ASCII characters - it leads to an implicit
-            # bytes -> unicode conversion using ASCII to decode.
-            for tarinfo in archive.getmembers():
-                if not isinstance(tarinfo.name, text_type):
-                    tarinfo.name = tarinfo.name.decode('utf-8')
-        archive.extractall(dest_dir)
-
-    finally:
-        if archive:
-            archive.close()
-
-
-def zip_dir(directory):
-    """zip a directory tree into a BytesIO object"""
-    result = io.BytesIO()
-    dlen = len(directory)
-    with ZipFile(result, "w") as zf:
-        for root, dirs, files in os.walk(directory):
-            for name in files:
-                full = os.path.join(root, name)
-                rel = root[dlen:]
-                dest = os.path.join(rel, name)
-                zf.write(full, dest)
-    return result
-
-#
-# Simple progress bar
-#
-
-UNITS = ('', 'K', 'M', 'G','T','P')
-
-
-class Progress(object):
-    unknown = 'UNKNOWN'
-
-    def __init__(self, minval=0, maxval=100):
-        assert maxval is None or maxval >= minval
-        self.min = self.cur = minval
-        self.max = maxval
-        self.started = None
-        self.elapsed = 0
-        self.done = False
-
-    def update(self, curval):
-        assert self.min <= curval
-        assert self.max is None or curval <= self.max
-        self.cur = curval
-        now = time.time()
-        if self.started is None:
-            self.started = now
-        else:
-            self.elapsed = now - self.started
-
-    def increment(self, incr):
-        assert incr >= 0
-        self.update(self.cur + incr)
-
-    def start(self):
-        self.update(self.min)
-        return self
-
-    def stop(self):
-        if self.max is not None:
-            self.update(self.max)
-        self.done = True
-
-    @property
-    def maximum(self):
-        return self.unknown if self.max is None else self.max
-
-    @property
-    def percentage(self):
-        if self.done:
-            result = '100 %'
-        elif self.max is None:
-            result = ' ?? %'
-        else:
-            v = 100.0 * (self.cur - self.min) / (self.max - self.min)
-            result = '%3d %%' % v
-        return result
-
-    def format_duration(self, duration):
-        if (duration <= 0) and self.max is None or self.cur == self.min:
-            result = '??:??:??'
-        #elif duration < 1:
-        #    result = '--:--:--'
-        else:
-            result = time.strftime('%H:%M:%S', time.gmtime(duration))
-        return result
-
-    @property
-    def ETA(self):
-        if self.done:
-            prefix = 'Done'
-            t = self.elapsed
-            #import pdb; pdb.set_trace()
-        else:
-            prefix = 'ETA '
-            if self.max is None:
-                t = -1
-            elif self.elapsed == 0 or (self.cur == self.min):
-                t = 0
-            else:
-                #import pdb; pdb.set_trace()
-                t = float(self.max - self.min)
-                t /= self.cur - self.min
-                t = (t - 1) * self.elapsed
-        return '%s: %s' % (prefix, self.format_duration(t))
-
-    @property
-    def speed(self):
-        if self.elapsed == 0:
-            result = 0.0
-        else:
-            result = (self.cur - self.min) / self.elapsed
-        for unit in UNITS:
-            if result < 1000:
-                break
-            result /= 1000.0
-        return '%d %sB/s' % (result, unit)
-
-#
-# Glob functionality
-#
-
-RICH_GLOB = re.compile(r'\{([^}]*)\}')
-_CHECK_RECURSIVE_GLOB = re.compile(r'[^/\\,{]\*\*|\*\*[^/\\,}]')
-_CHECK_MISMATCH_SET = re.compile(r'^[^{]*\}|\{[^}]*$')
-
-
-def iglob(path_glob):
-    """Extended globbing function that supports ** and {opt1,opt2,opt3}."""
-    if _CHECK_RECURSIVE_GLOB.search(path_glob):
-        msg = """invalid glob %r: recursive glob "**" must be used alone"""
-        raise ValueError(msg % path_glob)
-    if _CHECK_MISMATCH_SET.search(path_glob):
-        msg = """invalid glob %r: mismatching set marker '{' or '}'"""
-        raise ValueError(msg % path_glob)
-    return _iglob(path_glob)
-
-
-def _iglob(path_glob):
-    rich_path_glob = RICH_GLOB.split(path_glob, 1)
-    if len(rich_path_glob) > 1:
-        assert len(rich_path_glob) == 3, rich_path_glob
-        prefix, set, suffix = rich_path_glob
-        for item in set.split(','):
-            for path in _iglob(''.join((prefix, item, suffix))):
-                yield path
-    else:
-        if '**' not in path_glob:
-            for item in std_iglob(path_glob):
-                yield item
-        else:
-            prefix, radical = path_glob.split('**', 1)
-            if prefix == '':
-                prefix = '.'
-            if radical == '':
-                radical = '*'
-            else:
-                # we support both
-                radical = radical.lstrip('/')
-                radical = radical.lstrip('\\')
-            for path, dir, files in os.walk(prefix):
-                path = os.path.normpath(path)
-                for fn in _iglob(os.path.join(path, radical)):
-                    yield fn
-
-if ssl:
-    from .compat import (HTTPSHandler as BaseHTTPSHandler, match_hostname,
-                         CertificateError)
-
-
-#
-# HTTPSConnection which verifies certificates/matches domains
-#
-
-    class HTTPSConnection(httplib.HTTPSConnection):
-        ca_certs = None # set this to the path to the certs file (.pem)
-        check_domain = True # only used if ca_certs is not None
-
-        # noinspection PyPropertyAccess
-        def connect(self):
-            sock = socket.create_connection((self.host, self.port), self.timeout)
-            if getattr(self, '_tunnel_host', False):
-                self.sock = sock
-                self._tunnel()
-
-            if not hasattr(ssl, 'SSLContext'):
-                # For 2.x
-                if self.ca_certs:
-                    cert_reqs = ssl.CERT_REQUIRED
-                else:
-                    cert_reqs = ssl.CERT_NONE
-                self.sock = ssl.wrap_socket(sock, self.key_file, self.cert_file,
-                                            cert_reqs=cert_reqs,
-                                            ssl_version=ssl.PROTOCOL_SSLv23,
-                                            ca_certs=self.ca_certs)
-            else:  # pragma: no cover
-                context = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
-                context.options |= ssl.OP_NO_SSLv2
-                if self.cert_file:
-                    context.load_cert_chain(self.cert_file, self.key_file)
-                kwargs = {}
-                if self.ca_certs:
-                    context.verify_mode = ssl.CERT_REQUIRED
-                    context.load_verify_locations(cafile=self.ca_certs)
-                    if getattr(ssl, 'HAS_SNI', False):
-                        kwargs['server_hostname'] = self.host
-                self.sock = context.wrap_socket(sock, **kwargs)
-            if self.ca_certs and self.check_domain:
-                try:
-                    match_hostname(self.sock.getpeercert(), self.host)
-                    logger.debug('Host verified: %s', self.host)
-                except CertificateError:  # pragma: no cover
-                    self.sock.shutdown(socket.SHUT_RDWR)
-                    self.sock.close()
-                    raise
-
-    class HTTPSHandler(BaseHTTPSHandler):
-        def __init__(self, ca_certs, check_domain=True):
-            BaseHTTPSHandler.__init__(self)
-            self.ca_certs = ca_certs
-            self.check_domain = check_domain
-
-        def _conn_maker(self, *args, **kwargs):
-            """
-            This is called to create a connection instance. Normally you'd
-            pass a connection class to do_open, but it doesn't actually check for
-            a class, and just expects a callable. As long as we behave just as a
-            constructor would have, we should be OK. If it ever changes so that
-            we *must* pass a class, we'll create an UnsafeHTTPSConnection class
-            which just sets check_domain to False in the class definition, and
-            choose which one to pass to do_open.
-            """
-            result = HTTPSConnection(*args, **kwargs)
-            if self.ca_certs:
-                result.ca_certs = self.ca_certs
-                result.check_domain = self.check_domain
-            return result
-
-        def https_open(self, req):
-            try:
-                return self.do_open(self._conn_maker, req)
-            except URLError as e:
-                if 'certificate verify failed' in str(e.reason):
-                    raise CertificateError('Unable to verify server certificate '
-                                           'for %s' % req.host)
-                else:
-                    raise
-
-    #
-    # To prevent against mixing HTTP traffic with HTTPS (examples: A Man-In-The-
-    # Middle proxy using HTTP listens on port 443, or an index mistakenly serves
-    # HTML containing a http://xyz link when it should be https://xyz),
-    # you can use the following handler class, which does not allow HTTP traffic.
-    #
-    # It works by inheriting from HTTPHandler - so build_opener won't add a
-    # handler for HTTP itself.
-    #
-    class HTTPSOnlyHandler(HTTPSHandler, HTTPHandler):
-        def http_open(self, req):
-            raise URLError('Unexpected HTTP request on what should be a secure '
-                           'connection: %s' % req)
-
-#
-# XML-RPC with timeouts
-#
-
-_ver_info = sys.version_info[:2]
-
-if _ver_info == (2, 6):
-    class HTTP(httplib.HTTP):
-        def __init__(self, host='', port=None, **kwargs):
-            if port == 0:   # 0 means use port 0, not the default port
-                port = None
-            self._setup(self._connection_class(host, port, **kwargs))
-
-
-    if ssl:
-        class HTTPS(httplib.HTTPS):
-            def __init__(self, host='', port=None, **kwargs):
-                if port == 0:   # 0 means use port 0, not the default port
-                    port = None
-                self._setup(self._connection_class(host, port, **kwargs))
-
-
-class Transport(xmlrpclib.Transport):
-    def __init__(self, timeout, use_datetime=0):
-        self.timeout = timeout
-        xmlrpclib.Transport.__init__(self, use_datetime)
-
-    def make_connection(self, host):
-        h, eh, x509 = self.get_host_info(host)
-        if _ver_info == (2, 6):
-            result = HTTP(h, timeout=self.timeout)
-        else:
-            if not self._connection or host != self._connection[0]:
-                self._extra_headers = eh
-                self._connection = host, httplib.HTTPConnection(h)
-            result = self._connection[1]
-        return result
-
-if ssl:
-    class SafeTransport(xmlrpclib.SafeTransport):
-        def __init__(self, timeout, use_datetime=0):
-            self.timeout = timeout
-            xmlrpclib.SafeTransport.__init__(self, use_datetime)
-
-        def make_connection(self, host):
-            h, eh, kwargs = self.get_host_info(host)
-            if not kwargs:
-                kwargs = {}
-            kwargs['timeout'] = self.timeout
-            if _ver_info == (2, 6):
-                result = HTTPS(host, None, **kwargs)
-            else:
-                if not self._connection or host != self._connection[0]:
-                    self._extra_headers = eh
-                    self._connection = host, httplib.HTTPSConnection(h, None,
-                                                                     **kwargs)
-                result = self._connection[1]
-            return result
-
-
-class ServerProxy(xmlrpclib.ServerProxy):
-    def __init__(self, uri, **kwargs):
-        self.timeout = timeout = kwargs.pop('timeout', None)
-        # The above classes only come into play if a timeout
-        # is specified
-        if timeout is not None:
-            scheme, _ = splittype(uri)
-            use_datetime = kwargs.get('use_datetime', 0)
-            if scheme == 'https':
-                tcls = SafeTransport
-            else:
-                tcls = Transport
-            kwargs['transport'] = t = tcls(timeout, use_datetime=use_datetime)
-            self.transport = t
-        xmlrpclib.ServerProxy.__init__(self, uri, **kwargs)
-
-#
-# CSV functionality. This is provided because on 2.x, the csv module can't
-# handle Unicode. However, we need to deal with Unicode in e.g. RECORD files.
-#
-
-def _csv_open(fn, mode, **kwargs):
-    if sys.version_info[0] < 3:
-        mode += 'b'
-    else:
-        kwargs['newline'] = ''
-        # Python 3 determines encoding from locale. Force 'utf-8'
-        # file encoding to match other forced utf-8 encoding
-        kwargs['encoding'] = 'utf-8'
-    return open(fn, mode, **kwargs)
-
-
-class CSVBase(object):
-    defaults = {
-        'delimiter': str(','),      # The strs are used because we need native
-        'quotechar': str('"'),      # str in the csv API (2.x won't take
-        'lineterminator': str('\n') # Unicode)
-    }
-
-    def __enter__(self):
-        return self
-
-    def __exit__(self, *exc_info):
-        self.stream.close()
-
-
-class CSVReader(CSVBase):
-    def __init__(self, **kwargs):
-        if 'stream' in kwargs:
-            stream = kwargs['stream']
-            if sys.version_info[0] >= 3:
-                # needs to be a text stream
-                stream = codecs.getreader('utf-8')(stream)
-            self.stream = stream
-        else:
-            self.stream = _csv_open(kwargs['path'], 'r')
-        self.reader = csv.reader(self.stream, **self.defaults)
-
-    def __iter__(self):
-        return self
-
-    def next(self):
-        result = next(self.reader)
-        if sys.version_info[0] < 3:
-            for i, item in enumerate(result):
-                if not isinstance(item, text_type):
-                    result[i] = item.decode('utf-8')
-        return result
-
-    __next__ = next
-
-class CSVWriter(CSVBase):
-    def __init__(self, fn, **kwargs):
-        self.stream = _csv_open(fn, 'w')
-        self.writer = csv.writer(self.stream, **self.defaults)
-
-    def writerow(self, row):
-        if sys.version_info[0] < 3:
-            r = []
-            for item in row:
-                if isinstance(item, text_type):
-                    item = item.encode('utf-8')
-                r.append(item)
-            row = r
-        self.writer.writerow(row)
-
-#
-#   Configurator functionality
-#
-
-class Configurator(BaseConfigurator):
-
-    value_converters = dict(BaseConfigurator.value_converters)
-    value_converters['inc'] = 'inc_convert'
-
-    def __init__(self, config, base=None):
-        super(Configurator, self).__init__(config)
-        self.base = base or os.getcwd()
-
-    def configure_custom(self, config):
-        def convert(o):
-            if isinstance(o, (list, tuple)):
-                result = type(o)([convert(i) for i in o])
-            elif isinstance(o, dict):
-                if '()' in o:
-                    result = self.configure_custom(o)
-                else:
-                    result = {}
-                    for k in o:
-                        result[k] = convert(o[k])
-            else:
-                result = self.convert(o)
-            return result
-
-        c = config.pop('()')
-        if not callable(c):
-            c = self.resolve(c)
-        props = config.pop('.', None)
-        # Check for valid identifiers
-        args = config.pop('[]', ())
-        if args:
-            args = tuple([convert(o) for o in args])
-        items = [(k, convert(config[k])) for k in config if valid_ident(k)]
-        kwargs = dict(items)
-        result = c(*args, **kwargs)
-        if props:
-            for n, v in props.items():
-                setattr(result, n, convert(v))
-        return result
-
-    def __getitem__(self, key):
-        result = self.config[key]
-        if isinstance(result, dict) and '()' in result:
-            self.config[key] = result = self.configure_custom(result)
-        return result
-
-    def inc_convert(self, value):
-        """Default converter for the inc:// protocol."""
-        if not os.path.isabs(value):
-            value = os.path.join(self.base, value)
-        with codecs.open(value, 'r', encoding='utf-8') as f:
-            result = json.load(f)
-        return result
-
-
-class SubprocessMixin(object):
-    """
-    Mixin for running subprocesses and capturing their output
-    """
-    def __init__(self, verbose=False, progress=None):
-        self.verbose = verbose
-        self.progress = progress
-
-    def reader(self, stream, context):
-        """
-        Read lines from a subprocess' output stream and either pass to a progress
-        callable (if specified) or write progress information to sys.stderr.
-        """
-        progress = self.progress
-        verbose = self.verbose
-        while True:
-            s = stream.readline()
-            if not s:
-                break
-            if progress is not None:
-                progress(s, context)
-            else:
-                if not verbose:
-                    sys.stderr.write('.')
-                else:
-                    sys.stderr.write(s.decode('utf-8'))
-                sys.stderr.flush()
-        stream.close()
-
-    def run_command(self, cmd, **kwargs):
-        p = subprocess.Popen(cmd, stdout=subprocess.PIPE,
-                             stderr=subprocess.PIPE, **kwargs)
-        t1 = threading.Thread(target=self.reader, args=(p.stdout, 'stdout'))
-        t1.start()
-        t2 = threading.Thread(target=self.reader, args=(p.stderr, 'stderr'))
-        t2.start()
-        p.wait()
-        t1.join()
-        t2.join()
-        if self.progress is not None:
-            self.progress('done.', 'main')
-        elif self.verbose:
-            sys.stderr.write('done.\n')
-        return p
-
-
-def normalize_name(name):
-    """Normalize a python package name a la PEP 503"""
-    # https://www.python.org/dev/peps/pep-0503/#normalized-names
-    return re.sub('[-_.]+', '-', name).lower()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/version.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/version.py
deleted file mode 100644
index 3eebe18..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/version.py
+++ /dev/null
@@ -1,736 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-# Copyright (C) 2012-2017 The Python Software Foundation.
-# See LICENSE.txt and CONTRIBUTORS.txt.
-#
-"""
-Implementation of a flexible versioning scheme providing support for PEP-440,
-setuptools-compatible and semantic versioning.
-"""
-
-import logging
-import re
-
-from .compat import string_types
-from .util import parse_requirement
-
-__all__ = ['NormalizedVersion', 'NormalizedMatcher',
-           'LegacyVersion', 'LegacyMatcher',
-           'SemanticVersion', 'SemanticMatcher',
-           'UnsupportedVersionError', 'get_scheme']
-
-logger = logging.getLogger(__name__)
-
-
-class UnsupportedVersionError(ValueError):
-    """This is an unsupported version."""
-    pass
-
-
-class Version(object):
-    def __init__(self, s):
-        self._string = s = s.strip()
-        self._parts = parts = self.parse(s)
-        assert isinstance(parts, tuple)
-        assert len(parts) > 0
-
-    def parse(self, s):
-        raise NotImplementedError('please implement in a subclass')
-
-    def _check_compatible(self, other):
-        if type(self) != type(other):
-            raise TypeError('cannot compare %r and %r' % (self, other))
-
-    def __eq__(self, other):
-        self._check_compatible(other)
-        return self._parts == other._parts
-
-    def __ne__(self, other):
-        return not self.__eq__(other)
-
-    def __lt__(self, other):
-        self._check_compatible(other)
-        return self._parts < other._parts
-
-    def __gt__(self, other):
-        return not (self.__lt__(other) or self.__eq__(other))
-
-    def __le__(self, other):
-        return self.__lt__(other) or self.__eq__(other)
-
-    def __ge__(self, other):
-        return self.__gt__(other) or self.__eq__(other)
-
-    # See http://docs.python.org/reference/datamodel#object.__hash__
-    def __hash__(self):
-        return hash(self._parts)
-
-    def __repr__(self):
-        return "%s('%s')" % (self.__class__.__name__, self._string)
-
-    def __str__(self):
-        return self._string
-
-    @property
-    def is_prerelease(self):
-        raise NotImplementedError('Please implement in subclasses.')
-
-
-class Matcher(object):
-    version_class = None
-
-    # value is either a callable or the name of a method
-    _operators = {
-        '<': lambda v, c, p: v < c,
-        '>': lambda v, c, p: v > c,
-        '<=': lambda v, c, p: v == c or v < c,
-        '>=': lambda v, c, p: v == c or v > c,
-        '==': lambda v, c, p: v == c,
-        '===': lambda v, c, p: v == c,
-        # by default, compatible => >=.
-        '~=': lambda v, c, p: v == c or v > c,
-        '!=': lambda v, c, p: v != c,
-    }
-
-    # this is a method only to support alternative implementations
-    # via overriding
-    def parse_requirement(self, s):
-        return parse_requirement(s)
-
-    def __init__(self, s):
-        if self.version_class is None:
-            raise ValueError('Please specify a version class')
-        self._string = s = s.strip()
-        r = self.parse_requirement(s)
-        if not r:
-            raise ValueError('Not valid: %r' % s)
-        self.name = r.name
-        self.key = self.name.lower()    # for case-insensitive comparisons
-        clist = []
-        if r.constraints:
-            # import pdb; pdb.set_trace()
-            for op, s in r.constraints:
-                if s.endswith('.*'):
-                    if op not in ('==', '!='):
-                        raise ValueError('\'.*\' not allowed for '
-                                         '%r constraints' % op)
-                    # Could be a partial version (e.g. for '2.*') which
-                    # won't parse as a version, so keep it as a string
-                    vn, prefix = s[:-2], True
-                    # Just to check that vn is a valid version
-                    self.version_class(vn)
-                else:
-                    # Should parse as a version, so we can create an
-                    # instance for the comparison
-                    vn, prefix = self.version_class(s), False
-                clist.append((op, vn, prefix))
-        self._parts = tuple(clist)
-
-    def match(self, version):
-        """
-        Check if the provided version matches the constraints.
-
-        :param version: The version to match against this instance.
-        :type version: String or :class:`Version` instance.
-        """
-        if isinstance(version, string_types):
-            version = self.version_class(version)
-        for operator, constraint, prefix in self._parts:
-            f = self._operators.get(operator)
-            if isinstance(f, string_types):
-                f = getattr(self, f)
-            if not f:
-                msg = ('%r not implemented '
-                       'for %s' % (operator, self.__class__.__name__))
-                raise NotImplementedError(msg)
-            if not f(version, constraint, prefix):
-                return False
-        return True
-
-    @property
-    def exact_version(self):
-        result = None
-        if len(self._parts) == 1 and self._parts[0][0] in ('==', '==='):
-            result = self._parts[0][1]
-        return result
-
-    def _check_compatible(self, other):
-        if type(self) != type(other) or self.name != other.name:
-            raise TypeError('cannot compare %s and %s' % (self, other))
-
-    def __eq__(self, other):
-        self._check_compatible(other)
-        return self.key == other.key and self._parts == other._parts
-
-    def __ne__(self, other):
-        return not self.__eq__(other)
-
-    # See http://docs.python.org/reference/datamodel#object.__hash__
-    def __hash__(self):
-        return hash(self.key) + hash(self._parts)
-
-    def __repr__(self):
-        return "%s(%r)" % (self.__class__.__name__, self._string)
-
-    def __str__(self):
-        return self._string
-
-
-PEP440_VERSION_RE = re.compile(r'^v?(\d+!)?(\d+(\.\d+)*)((a|b|c|rc)(\d+))?'
-                               r'(\.(post)(\d+))?(\.(dev)(\d+))?'
-                               r'(\+([a-zA-Z\d]+(\.[a-zA-Z\d]+)?))?$')
-
-
-def _pep_440_key(s):
-    s = s.strip()
-    m = PEP440_VERSION_RE.match(s)
-    if not m:
-        raise UnsupportedVersionError('Not a valid version: %s' % s)
-    groups = m.groups()
-    nums = tuple(int(v) for v in groups[1].split('.'))
-    while len(nums) > 1 and nums[-1] == 0:
-        nums = nums[:-1]
-
-    if not groups[0]:
-        epoch = 0
-    else:
-        epoch = int(groups[0])
-    pre = groups[4:6]
-    post = groups[7:9]
-    dev = groups[10:12]
-    local = groups[13]
-    if pre == (None, None):
-        pre = ()
-    else:
-        pre = pre[0], int(pre[1])
-    if post == (None, None):
-        post = ()
-    else:
-        post = post[0], int(post[1])
-    if dev == (None, None):
-        dev = ()
-    else:
-        dev = dev[0], int(dev[1])
-    if local is None:
-        local = ()
-    else:
-        parts = []
-        for part in local.split('.'):
-            # to ensure that numeric compares as > lexicographic, avoid
-            # comparing them directly, but encode a tuple which ensures
-            # correct sorting
-            if part.isdigit():
-                part = (1, int(part))
-            else:
-                part = (0, part)
-            parts.append(part)
-        local = tuple(parts)
-    if not pre:
-        # either before pre-release, or final release and after
-        if not post and dev:
-            # before pre-release
-            pre = ('a', -1)     # to sort before a0
-        else:
-            pre = ('z',)        # to sort after all pre-releases
-    # now look at the state of post and dev.
-    if not post:
-        post = ('_',)   # sort before 'a'
-    if not dev:
-        dev = ('final',)
-
-    #print('%s -> %s' % (s, m.groups()))
-    return epoch, nums, pre, post, dev, local
-
-
-_normalized_key = _pep_440_key
-
-
-class NormalizedVersion(Version):
-    """A rational version.
-
-    Good:
-        1.2         # equivalent to "1.2.0"
-        1.2.0
-        1.2a1
-        1.2.3a2
-        1.2.3b1
-        1.2.3c1
-        1.2.3.4
-        TODO: fill this out
-
-    Bad:
-        1           # minimum two numbers
-        1.2a        # release level must have a release serial
-        1.2.3b
-    """
-    def parse(self, s):
-        result = _normalized_key(s)
-        # _normalized_key loses trailing zeroes in the release
-        # clause, since that's needed to ensure that X.Y == X.Y.0 == X.Y.0.0
-        # However, PEP 440 prefix matching needs it: for example,
-        # (~= 1.4.5.0) matches differently to (~= 1.4.5.0.0).
-        m = PEP440_VERSION_RE.match(s)      # must succeed
-        groups = m.groups()
-        self._release_clause = tuple(int(v) for v in groups[1].split('.'))
-        return result
-
-    PREREL_TAGS = set(['a', 'b', 'c', 'rc', 'dev'])
-
-    @property
-    def is_prerelease(self):
-        return any(t[0] in self.PREREL_TAGS for t in self._parts if t)
-
-
-def _match_prefix(x, y):
-    x = str(x)
-    y = str(y)
-    if x == y:
-        return True
-    if not x.startswith(y):
-        return False
-    n = len(y)
-    return x[n] == '.'
-
-
-class NormalizedMatcher(Matcher):
-    version_class = NormalizedVersion
-
-    # value is either a callable or the name of a method
-    _operators = {
-        '~=': '_match_compatible',
-        '<': '_match_lt',
-        '>': '_match_gt',
-        '<=': '_match_le',
-        '>=': '_match_ge',
-        '==': '_match_eq',
-        '===': '_match_arbitrary',
-        '!=': '_match_ne',
-    }
-
-    def _adjust_local(self, version, constraint, prefix):
-        if prefix:
-            strip_local = '+' not in constraint and version._parts[-1]
-        else:
-            # both constraint and version are
-            # NormalizedVersion instances.
-            # If constraint does not have a local component,
-            # ensure the version doesn't, either.
-            strip_local = not constraint._parts[-1] and version._parts[-1]
-        if strip_local:
-            s = version._string.split('+', 1)[0]
-            version = self.version_class(s)
-        return version, constraint
-
-    def _match_lt(self, version, constraint, prefix):
-        version, constraint = self._adjust_local(version, constraint, prefix)
-        if version >= constraint:
-            return False
-        release_clause = constraint._release_clause
-        pfx = '.'.join([str(i) for i in release_clause])
-        return not _match_prefix(version, pfx)
-
-    def _match_gt(self, version, constraint, prefix):
-        version, constraint = self._adjust_local(version, constraint, prefix)
-        if version <= constraint:
-            return False
-        release_clause = constraint._release_clause
-        pfx = '.'.join([str(i) for i in release_clause])
-        return not _match_prefix(version, pfx)
-
-    def _match_le(self, version, constraint, prefix):
-        version, constraint = self._adjust_local(version, constraint, prefix)
-        return version <= constraint
-
-    def _match_ge(self, version, constraint, prefix):
-        version, constraint = self._adjust_local(version, constraint, prefix)
-        return version >= constraint
-
-    def _match_eq(self, version, constraint, prefix):
-        version, constraint = self._adjust_local(version, constraint, prefix)
-        if not prefix:
-            result = (version == constraint)
-        else:
-            result = _match_prefix(version, constraint)
-        return result
-
-    def _match_arbitrary(self, version, constraint, prefix):
-        return str(version) == str(constraint)
-
-    def _match_ne(self, version, constraint, prefix):
-        version, constraint = self._adjust_local(version, constraint, prefix)
-        if not prefix:
-            result = (version != constraint)
-        else:
-            result = not _match_prefix(version, constraint)
-        return result
-
-    def _match_compatible(self, version, constraint, prefix):
-        version, constraint = self._adjust_local(version, constraint, prefix)
-        if version == constraint:
-            return True
-        if version < constraint:
-            return False
-#        if not prefix:
-#            return True
-        release_clause = constraint._release_clause
-        if len(release_clause) > 1:
-            release_clause = release_clause[:-1]
-        pfx = '.'.join([str(i) for i in release_clause])
-        return _match_prefix(version, pfx)
-
-_REPLACEMENTS = (
-    (re.compile('[.+-]$'), ''),                     # remove trailing puncts
-    (re.compile(r'^[.](\d)'), r'0.\1'),             # .N -> 0.N at start
-    (re.compile('^[.-]'), ''),                      # remove leading puncts
-    (re.compile(r'^\((.*)\)$'), r'\1'),             # remove parentheses
-    (re.compile(r'^v(ersion)?\s*(\d+)'), r'\2'),    # remove leading v(ersion)
-    (re.compile(r'^r(ev)?\s*(\d+)'), r'\2'),        # remove leading v(ersion)
-    (re.compile('[.]{2,}'), '.'),                   # multiple runs of '.'
-    (re.compile(r'\b(alfa|apha)\b'), 'alpha'),      # misspelt alpha
-    (re.compile(r'\b(pre-alpha|prealpha)\b'),
-                'pre.alpha'),                       # standardise
-    (re.compile(r'\(beta\)$'), 'beta'),             # remove parentheses
-)
-
-_SUFFIX_REPLACEMENTS = (
-    (re.compile('^[:~._+-]+'), ''),                   # remove leading puncts
-    (re.compile('[,*")([\\]]'), ''),                  # remove unwanted chars
-    (re.compile('[~:+_ -]'), '.'),                    # replace illegal chars
-    (re.compile('[.]{2,}'), '.'),                   # multiple runs of '.'
-    (re.compile(r'\.$'), ''),                       # trailing '.'
-)
-
-_NUMERIC_PREFIX = re.compile(r'(\d+(\.\d+)*)')
-
-
-def _suggest_semantic_version(s):
-    """
-    Try to suggest a semantic form for a version for which
-    _suggest_normalized_version couldn't come up with anything.
-    """
-    result = s.strip().lower()
-    for pat, repl in _REPLACEMENTS:
-        result = pat.sub(repl, result)
-    if not result:
-        result = '0.0.0'
-
-    # Now look for numeric prefix, and separate it out from
-    # the rest.
-    #import pdb; pdb.set_trace()
-    m = _NUMERIC_PREFIX.match(result)
-    if not m:
-        prefix = '0.0.0'
-        suffix = result
-    else:
-        prefix = m.groups()[0].split('.')
-        prefix = [int(i) for i in prefix]
-        while len(prefix) < 3:
-            prefix.append(0)
-        if len(prefix) == 3:
-            suffix = result[m.end():]
-        else:
-            suffix = '.'.join([str(i) for i in prefix[3:]]) + result[m.end():]
-            prefix = prefix[:3]
-        prefix = '.'.join([str(i) for i in prefix])
-        suffix = suffix.strip()
-    if suffix:
-        #import pdb; pdb.set_trace()
-        # massage the suffix.
-        for pat, repl in _SUFFIX_REPLACEMENTS:
-            suffix = pat.sub(repl, suffix)
-
-    if not suffix:
-        result = prefix
-    else:
-        sep = '-' if 'dev' in suffix else '+'
-        result = prefix + sep + suffix
-    if not is_semver(result):
-        result = None
-    return result
-
-
-def _suggest_normalized_version(s):
-    """Suggest a normalized version close to the given version string.
-
-    If you have a version string that isn't rational (i.e. NormalizedVersion
-    doesn't like it) then you might be able to get an equivalent (or close)
-    rational version from this function.
-
-    This does a number of simple normalizations to the given string, based
-    on observation of versions currently in use on PyPI. Given a dump of
-    those version during PyCon 2009, 4287 of them:
-    - 2312 (53.93%) match NormalizedVersion without change
-      with the automatic suggestion
-    - 3474 (81.04%) match when using this suggestion method
-
-    @param s {str} An irrational version string.
-    @returns A rational version string, or None, if couldn't determine one.
-    """
-    try:
-        _normalized_key(s)
-        return s   # already rational
-    except UnsupportedVersionError:
-        pass
-
-    rs = s.lower()
-
-    # part of this could use maketrans
-    for orig, repl in (('-alpha', 'a'), ('-beta', 'b'), ('alpha', 'a'),
-                       ('beta', 'b'), ('rc', 'c'), ('-final', ''),
-                       ('-pre', 'c'),
-                       ('-release', ''), ('.release', ''), ('-stable', ''),
-                       ('+', '.'), ('_', '.'), (' ', ''), ('.final', ''),
-                       ('final', '')):
-        rs = rs.replace(orig, repl)
-
-    # if something ends with dev or pre, we add a 0
-    rs = re.sub(r"pre$", r"pre0", rs)
-    rs = re.sub(r"dev$", r"dev0", rs)
-
-    # if we have something like "b-2" or "a.2" at the end of the
-    # version, that is probably beta, alpha, etc
-    # let's remove the dash or dot
-    rs = re.sub(r"([abc]|rc)[\-\.](\d+)$", r"\1\2", rs)
-
-    # 1.0-dev-r371 -> 1.0.dev371
-    # 0.1-dev-r79 -> 0.1.dev79
-    rs = re.sub(r"[\-\.](dev)[\-\.]?r?(\d+)$", r".\1\2", rs)
-
-    # Clean: 2.0.a.3, 2.0.b1, 0.9.0~c1
-    rs = re.sub(r"[.~]?([abc])\.?", r"\1", rs)
-
-    # Clean: v0.3, v1.0
-    if rs.startswith('v'):
-        rs = rs[1:]
-
-    # Clean leading '0's on numbers.
-    #TODO: unintended side-effect on, e.g., "2003.05.09"
-    # PyPI stats: 77 (~2%) better
-    rs = re.sub(r"\b0+(\d+)(?!\d)", r"\1", rs)
-
-    # Clean a/b/c with no version. E.g. "1.0a" -> "1.0a0". Setuptools infers
-    # zero.
-    # PyPI stats: 245 (7.56%) better
-    rs = re.sub(r"(\d+[abc])$", r"\g<1>0", rs)
-
-    # the 'dev-rNNN' tag is a dev tag
-    rs = re.sub(r"\.?(dev-r|dev\.r)\.?(\d+)$", r".dev\2", rs)
-
-    # clean the - when used as a pre delimiter
-    rs = re.sub(r"-(a|b|c)(\d+)$", r"\1\2", rs)
-
-    # a terminal "dev" or "devel" can be changed into ".dev0"
-    rs = re.sub(r"[\.\-](dev|devel)$", r".dev0", rs)
-
-    # a terminal "dev" can be changed into ".dev0"
-    rs = re.sub(r"(?![\.\-])dev$", r".dev0", rs)
-
-    # a terminal "final" or "stable" can be removed
-    rs = re.sub(r"(final|stable)$", "", rs)
-
-    # The 'r' and the '-' tags are post release tags
-    #   0.4a1.r10       ->  0.4a1.post10
-    #   0.9.33-17222    ->  0.9.33.post17222
-    #   0.9.33-r17222   ->  0.9.33.post17222
-    rs = re.sub(r"\.?(r|-|-r)\.?(\d+)$", r".post\2", rs)
-
-    # Clean 'r' instead of 'dev' usage:
-    #   0.9.33+r17222   ->  0.9.33.dev17222
-    #   1.0dev123       ->  1.0.dev123
-    #   1.0.git123      ->  1.0.dev123
-    #   1.0.bzr123      ->  1.0.dev123
-    #   0.1a0dev.123    ->  0.1a0.dev123
-    # PyPI stats:  ~150 (~4%) better
-    rs = re.sub(r"\.?(dev|git|bzr)\.?(\d+)$", r".dev\2", rs)
-
-    # Clean '.pre' (normalized from '-pre' above) instead of 'c' usage:
-    #   0.2.pre1        ->  0.2c1
-    #   0.2-c1         ->  0.2c1
-    #   1.0preview123   ->  1.0c123
-    # PyPI stats: ~21 (0.62%) better
-    rs = re.sub(r"\.?(pre|preview|-c)(\d+)$", r"c\g<2>", rs)
-
-    # Tcl/Tk uses "px" for their post release markers
-    rs = re.sub(r"p(\d+)$", r".post\1", rs)
-
-    try:
-        _normalized_key(rs)
-    except UnsupportedVersionError:
-        rs = None
-    return rs
-
-#
-#   Legacy version processing (distribute-compatible)
-#
-
-_VERSION_PART = re.compile(r'([a-z]+|\d+|[\.-])', re.I)
-_VERSION_REPLACE = {
-    'pre': 'c',
-    'preview': 'c',
-    '-': 'final-',
-    'rc': 'c',
-    'dev': '@',
-    '': None,
-    '.': None,
-}
-
-
-def _legacy_key(s):
-    def get_parts(s):
-        result = []
-        for p in _VERSION_PART.split(s.lower()):
-            p = _VERSION_REPLACE.get(p, p)
-            if p:
-                if '0' <= p[:1] <= '9':
-                    p = p.zfill(8)
-                else:
-                    p = '*' + p
-                result.append(p)
-        result.append('*final')
-        return result
-
-    result = []
-    for p in get_parts(s):
-        if p.startswith('*'):
-            if p < '*final':
-                while result and result[-1] == '*final-':
-                    result.pop()
-            while result and result[-1] == '00000000':
-                result.pop()
-        result.append(p)
-    return tuple(result)
-
-
-class LegacyVersion(Version):
-    def parse(self, s):
-        return _legacy_key(s)
-
-    @property
-    def is_prerelease(self):
-        result = False
-        for x in self._parts:
-            if (isinstance(x, string_types) and x.startswith('*') and
-                x < '*final'):
-                result = True
-                break
-        return result
-
-
-class LegacyMatcher(Matcher):
-    version_class = LegacyVersion
-
-    _operators = dict(Matcher._operators)
-    _operators['~='] = '_match_compatible'
-
-    numeric_re = re.compile(r'^(\d+(\.\d+)*)')
-
-    def _match_compatible(self, version, constraint, prefix):
-        if version < constraint:
-            return False
-        m = self.numeric_re.match(str(constraint))
-        if not m:
-            logger.warning('Cannot compute compatible match for version %s '
-                           ' and constraint %s', version, constraint)
-            return True
-        s = m.groups()[0]
-        if '.' in s:
-            s = s.rsplit('.', 1)[0]
-        return _match_prefix(version, s)
-
-#
-#   Semantic versioning
-#
-
-_SEMVER_RE = re.compile(r'^(\d+)\.(\d+)\.(\d+)'
-                        r'(-[a-z0-9]+(\.[a-z0-9-]+)*)?'
-                        r'(\+[a-z0-9]+(\.[a-z0-9-]+)*)?$', re.I)
-
-
-def is_semver(s):
-    return _SEMVER_RE.match(s)
-
-
-def _semantic_key(s):
-    def make_tuple(s, absent):
-        if s is None:
-            result = (absent,)
-        else:
-            parts = s[1:].split('.')
-            # We can't compare ints and strings on Python 3, so fudge it
-            # by zero-filling numeric values so simulate a numeric comparison
-            result = tuple([p.zfill(8) if p.isdigit() else p for p in parts])
-        return result
-
-    m = is_semver(s)
-    if not m:
-        raise UnsupportedVersionError(s)
-    groups = m.groups()
-    major, minor, patch = [int(i) for i in groups[:3]]
-    # choose the '|' and '*' so that versions sort correctly
-    pre, build = make_tuple(groups[3], '|'), make_tuple(groups[5], '*')
-    return (major, minor, patch), pre, build
-
-
-class SemanticVersion(Version):
-    def parse(self, s):
-        return _semantic_key(s)
-
-    @property
-    def is_prerelease(self):
-        return self._parts[1][0] != '|'
-
-
-class SemanticMatcher(Matcher):
-    version_class = SemanticVersion
-
-
-class VersionScheme(object):
-    def __init__(self, key, matcher, suggester=None):
-        self.key = key
-        self.matcher = matcher
-        self.suggester = suggester
-
-    def is_valid_version(self, s):
-        try:
-            self.matcher.version_class(s)
-            result = True
-        except UnsupportedVersionError:
-            result = False
-        return result
-
-    def is_valid_matcher(self, s):
-        try:
-            self.matcher(s)
-            result = True
-        except UnsupportedVersionError:
-            result = False
-        return result
-
-    def is_valid_constraint_list(self, s):
-        """
-        Used for processing some metadata fields
-        """
-        return self.is_valid_matcher('dummy_name (%s)' % s)
-
-    def suggest(self, s):
-        if self.suggester is None:
-            result = None
-        else:
-            result = self.suggester(s)
-        return result
-
-_SCHEMES = {
-    'normalized': VersionScheme(_normalized_key, NormalizedMatcher,
-                                _suggest_normalized_version),
-    'legacy': VersionScheme(_legacy_key, LegacyMatcher, lambda self, s: s),
-    'semantic': VersionScheme(_semantic_key, SemanticMatcher,
-                              _suggest_semantic_version),
-}
-
-_SCHEMES['default'] = _SCHEMES['normalized']
-
-
-def get_scheme(name):
-    if name not in _SCHEMES:
-        raise ValueError('unknown scheme name: %r' % name)
-    return _SCHEMES[name]
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/w32.exe b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/w32.exe
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index 732215a..0000000
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diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/w64.exe b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/w64.exe
deleted file mode 100644
index c41bd0a..0000000
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diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/wheel.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/wheel.py
deleted file mode 100644
index b04bfae..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/wheel.py
+++ /dev/null
@@ -1,988 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-# Copyright (C) 2013-2017 Vinay Sajip.
-# Licensed to the Python Software Foundation under a contributor agreement.
-# See LICENSE.txt and CONTRIBUTORS.txt.
-#
-from __future__ import unicode_literals
-
-import base64
-import codecs
-import datetime
-import distutils.util
-from email import message_from_file
-import hashlib
-import imp
-import json
-import logging
-import os
-import posixpath
-import re
-import shutil
-import sys
-import tempfile
-import zipfile
-
-from . import __version__, DistlibException
-from .compat import sysconfig, ZipFile, fsdecode, text_type, filter
-from .database import InstalledDistribution
-from .metadata import Metadata, METADATA_FILENAME, WHEEL_METADATA_FILENAME
-from .util import (FileOperator, convert_path, CSVReader, CSVWriter, Cache,
-                   cached_property, get_cache_base, read_exports, tempdir)
-from .version import NormalizedVersion, UnsupportedVersionError
-
-logger = logging.getLogger(__name__)
-
-cache = None    # created when needed
-
-if hasattr(sys, 'pypy_version_info'):  # pragma: no cover
-    IMP_PREFIX = 'pp'
-elif sys.platform.startswith('java'):  # pragma: no cover
-    IMP_PREFIX = 'jy'
-elif sys.platform == 'cli':  # pragma: no cover
-    IMP_PREFIX = 'ip'
-else:
-    IMP_PREFIX = 'cp'
-
-VER_SUFFIX = sysconfig.get_config_var('py_version_nodot')
-if not VER_SUFFIX:   # pragma: no cover
-    VER_SUFFIX = '%s%s' % sys.version_info[:2]
-PYVER = 'py' + VER_SUFFIX
-IMPVER = IMP_PREFIX + VER_SUFFIX
-
-ARCH = distutils.util.get_platform().replace('-', '_').replace('.', '_')
-
-ABI = sysconfig.get_config_var('SOABI')
-if ABI and ABI.startswith('cpython-'):
-    ABI = ABI.replace('cpython-', 'cp')
-else:
-    def _derive_abi():
-        parts = ['cp', VER_SUFFIX]
-        if sysconfig.get_config_var('Py_DEBUG'):
-            parts.append('d')
-        if sysconfig.get_config_var('WITH_PYMALLOC'):
-            parts.append('m')
-        if sysconfig.get_config_var('Py_UNICODE_SIZE') == 4:
-            parts.append('u')
-        return ''.join(parts)
-    ABI = _derive_abi()
-    del _derive_abi
-
-FILENAME_RE = re.compile(r'''
-(?P<nm>[^-]+)
--(?P<vn>\d+[^-]*)
-(-(?P<bn>\d+[^-]*))?
--(?P<py>\w+\d+(\.\w+\d+)*)
--(?P<bi>\w+)
--(?P<ar>\w+(\.\w+)*)
-\.whl$
-''', re.IGNORECASE | re.VERBOSE)
-
-NAME_VERSION_RE = re.compile(r'''
-(?P<nm>[^-]+)
--(?P<vn>\d+[^-]*)
-(-(?P<bn>\d+[^-]*))?$
-''', re.IGNORECASE | re.VERBOSE)
-
-SHEBANG_RE = re.compile(br'\s*#![^\r\n]*')
-SHEBANG_DETAIL_RE = re.compile(br'^(\s*#!("[^"]+"|\S+))\s+(.*)$')
-SHEBANG_PYTHON = b'#!python'
-SHEBANG_PYTHONW = b'#!pythonw'
-
-if os.sep == '/':
-    to_posix = lambda o: o
-else:
-    to_posix = lambda o: o.replace(os.sep, '/')
-
-
-class Mounter(object):
-    def __init__(self):
-        self.impure_wheels = {}
-        self.libs = {}
-
-    def add(self, pathname, extensions):
-        self.impure_wheels[pathname] = extensions
-        self.libs.update(extensions)
-
-    def remove(self, pathname):
-        extensions = self.impure_wheels.pop(pathname)
-        for k, v in extensions:
-            if k in self.libs:
-                del self.libs[k]
-
-    def find_module(self, fullname, path=None):
-        if fullname in self.libs:
-            result = self
-        else:
-            result = None
-        return result
-
-    def load_module(self, fullname):
-        if fullname in sys.modules:
-            result = sys.modules[fullname]
-        else:
-            if fullname not in self.libs:
-                raise ImportError('unable to find extension for %s' % fullname)
-            result = imp.load_dynamic(fullname, self.libs[fullname])
-            result.__loader__ = self
-            parts = fullname.rsplit('.', 1)
-            if len(parts) > 1:
-                result.__package__ = parts[0]
-        return result
-
-_hook = Mounter()
-
-
-class Wheel(object):
-    """
-    Class to build and install from Wheel files (PEP 427).
-    """
-
-    wheel_version = (1, 1)
-    hash_kind = 'sha256'
-
-    def __init__(self, filename=None, sign=False, verify=False):
-        """
-        Initialise an instance using a (valid) filename.
-        """
-        self.sign = sign
-        self.should_verify = verify
-        self.buildver = ''
-        self.pyver = [PYVER]
-        self.abi = ['none']
-        self.arch = ['any']
-        self.dirname = os.getcwd()
-        if filename is None:
-            self.name = 'dummy'
-            self.version = '0.1'
-            self._filename = self.filename
-        else:
-            m = NAME_VERSION_RE.match(filename)
-            if m:
-                info = m.groupdict('')
-                self.name = info['nm']
-                # Reinstate the local version separator
-                self.version = info['vn'].replace('_', '-')
-                self.buildver = info['bn']
-                self._filename = self.filename
-            else:
-                dirname, filename = os.path.split(filename)
-                m = FILENAME_RE.match(filename)
-                if not m:
-                    raise DistlibException('Invalid name or '
-                                           'filename: %r' % filename)
-                if dirname:
-                    self.dirname = os.path.abspath(dirname)
-                self._filename = filename
-                info = m.groupdict('')
-                self.name = info['nm']
-                self.version = info['vn']
-                self.buildver = info['bn']
-                self.pyver = info['py'].split('.')
-                self.abi = info['bi'].split('.')
-                self.arch = info['ar'].split('.')
-
-    @property
-    def filename(self):
-        """
-        Build and return a filename from the various components.
-        """
-        if self.buildver:
-            buildver = '-' + self.buildver
-        else:
-            buildver = ''
-        pyver = '.'.join(self.pyver)
-        abi = '.'.join(self.abi)
-        arch = '.'.join(self.arch)
-        # replace - with _ as a local version separator
-        version = self.version.replace('-', '_')
-        return '%s-%s%s-%s-%s-%s.whl' % (self.name, version, buildver,
-                                         pyver, abi, arch)
-
-    @property
-    def exists(self):
-        path = os.path.join(self.dirname, self.filename)
-        return os.path.isfile(path)
-
-    @property
-    def tags(self):
-        for pyver in self.pyver:
-            for abi in self.abi:
-                for arch in self.arch:
-                    yield pyver, abi, arch
-
-    @cached_property
-    def metadata(self):
-        pathname = os.path.join(self.dirname, self.filename)
-        name_ver = '%s-%s' % (self.name, self.version)
-        info_dir = '%s.dist-info' % name_ver
-        wrapper = codecs.getreader('utf-8')
-        with ZipFile(pathname, 'r') as zf:
-            wheel_metadata = self.get_wheel_metadata(zf)
-            wv = wheel_metadata['Wheel-Version'].split('.', 1)
-            file_version = tuple([int(i) for i in wv])
-            if file_version < (1, 1):
-                fns = [WHEEL_METADATA_FILENAME, METADATA_FILENAME, 'METADATA']
-            else:
-                fns = [WHEEL_METADATA_FILENAME, METADATA_FILENAME]
-            result = None
-            for fn in fns:
-                try:
-                    metadata_filename = posixpath.join(info_dir, fn)
-                    with zf.open(metadata_filename) as bf:
-                        wf = wrapper(bf)
-                        result = Metadata(fileobj=wf)
-                        if result:
-                            break
-                except KeyError:
-                    pass
-            if not result:
-                raise ValueError('Invalid wheel, because metadata is '
-                                 'missing: looked in %s' % ', '.join(fns))
-        return result
-
-    def get_wheel_metadata(self, zf):
-        name_ver = '%s-%s' % (self.name, self.version)
-        info_dir = '%s.dist-info' % name_ver
-        metadata_filename = posixpath.join(info_dir, 'WHEEL')
-        with zf.open(metadata_filename) as bf:
-            wf = codecs.getreader('utf-8')(bf)
-            message = message_from_file(wf)
-        return dict(message)
-
-    @cached_property
-    def info(self):
-        pathname = os.path.join(self.dirname, self.filename)
-        with ZipFile(pathname, 'r') as zf:
-            result = self.get_wheel_metadata(zf)
-        return result
-
-    def process_shebang(self, data):
-        m = SHEBANG_RE.match(data)
-        if m:
-            end = m.end()
-            shebang, data_after_shebang = data[:end], data[end:]
-            # Preserve any arguments after the interpreter
-            if b'pythonw' in shebang.lower():
-                shebang_python = SHEBANG_PYTHONW
-            else:
-                shebang_python = SHEBANG_PYTHON
-            m = SHEBANG_DETAIL_RE.match(shebang)
-            if m:
-                args = b' ' + m.groups()[-1]
-            else:
-                args = b''
-            shebang = shebang_python + args
-            data = shebang + data_after_shebang
-        else:
-            cr = data.find(b'\r')
-            lf = data.find(b'\n')
-            if cr < 0 or cr > lf:
-                term = b'\n'
-            else:
-                if data[cr:cr + 2] == b'\r\n':
-                    term = b'\r\n'
-                else:
-                    term = b'\r'
-            data = SHEBANG_PYTHON + term + data
-        return data
-
-    def get_hash(self, data, hash_kind=None):
-        if hash_kind is None:
-            hash_kind = self.hash_kind
-        try:
-            hasher = getattr(hashlib, hash_kind)
-        except AttributeError:
-            raise DistlibException('Unsupported hash algorithm: %r' % hash_kind)
-        result = hasher(data).digest()
-        result = base64.urlsafe_b64encode(result).rstrip(b'=').decode('ascii')
-        return hash_kind, result
-
-    def write_record(self, records, record_path, base):
-        records = list(records) # make a copy for sorting
-        p = to_posix(os.path.relpath(record_path, base))
-        records.append((p, '', ''))
-        records.sort()
-        with CSVWriter(record_path) as writer:
-            for row in records:
-                writer.writerow(row)
-
-    def write_records(self, info, libdir, archive_paths):
-        records = []
-        distinfo, info_dir = info
-        hasher = getattr(hashlib, self.hash_kind)
-        for ap, p in archive_paths:
-            with open(p, 'rb') as f:
-                data = f.read()
-            digest = '%s=%s' % self.get_hash(data)
-            size = os.path.getsize(p)
-            records.append((ap, digest, size))
-
-        p = os.path.join(distinfo, 'RECORD')
-        self.write_record(records, p, libdir)
-        ap = to_posix(os.path.join(info_dir, 'RECORD'))
-        archive_paths.append((ap, p))
-
-    def build_zip(self, pathname, archive_paths):
-        with ZipFile(pathname, 'w', zipfile.ZIP_DEFLATED) as zf:
-            for ap, p in archive_paths:
-                logger.debug('Wrote %s to %s in wheel', p, ap)
-                zf.write(p, ap)
-
-    def build(self, paths, tags=None, wheel_version=None):
-        """
-        Build a wheel from files in specified paths, and use any specified tags
-        when determining the name of the wheel.
-        """
-        if tags is None:
-            tags = {}
-
-        libkey = list(filter(lambda o: o in paths, ('purelib', 'platlib')))[0]
-        if libkey == 'platlib':
-            is_pure = 'false'
-            default_pyver = [IMPVER]
-            default_abi = [ABI]
-            default_arch = [ARCH]
-        else:
-            is_pure = 'true'
-            default_pyver = [PYVER]
-            default_abi = ['none']
-            default_arch = ['any']
-
-        self.pyver = tags.get('pyver', default_pyver)
-        self.abi = tags.get('abi', default_abi)
-        self.arch = tags.get('arch', default_arch)
-
-        libdir = paths[libkey]
-
-        name_ver = '%s-%s' % (self.name, self.version)
-        data_dir = '%s.data' % name_ver
-        info_dir = '%s.dist-info' % name_ver
-
-        archive_paths = []
-
-        # First, stuff which is not in site-packages
-        for key in ('data', 'headers', 'scripts'):
-            if key not in paths:
-                continue
-            path = paths[key]
-            if os.path.isdir(path):
-                for root, dirs, files in os.walk(path):
-                    for fn in files:
-                        p = fsdecode(os.path.join(root, fn))
-                        rp = os.path.relpath(p, path)
-                        ap = to_posix(os.path.join(data_dir, key, rp))
-                        archive_paths.append((ap, p))
-                        if key == 'scripts' and not p.endswith('.exe'):
-                            with open(p, 'rb') as f:
-                                data = f.read()
-                            data = self.process_shebang(data)
-                            with open(p, 'wb') as f:
-                                f.write(data)
-
-        # Now, stuff which is in site-packages, other than the
-        # distinfo stuff.
-        path = libdir
-        distinfo = None
-        for root, dirs, files in os.walk(path):
-            if root == path:
-                # At the top level only, save distinfo for later
-                # and skip it for now
-                for i, dn in enumerate(dirs):
-                    dn = fsdecode(dn)
-                    if dn.endswith('.dist-info'):
-                        distinfo = os.path.join(root, dn)
-                        del dirs[i]
-                        break
-                assert distinfo, '.dist-info directory expected, not found'
-
-            for fn in files:
-                # comment out next suite to leave .pyc files in
-                if fsdecode(fn).endswith(('.pyc', '.pyo')):
-                    continue
-                p = os.path.join(root, fn)
-                rp = to_posix(os.path.relpath(p, path))
-                archive_paths.append((rp, p))
-
-        # Now distinfo. Assumed to be flat, i.e. os.listdir is enough.
-        files = os.listdir(distinfo)
-        for fn in files:
-            if fn not in ('RECORD', 'INSTALLER', 'SHARED', 'WHEEL'):
-                p = fsdecode(os.path.join(distinfo, fn))
-                ap = to_posix(os.path.join(info_dir, fn))
-                archive_paths.append((ap, p))
-
-        wheel_metadata = [
-            'Wheel-Version: %d.%d' % (wheel_version or self.wheel_version),
-            'Generator: distlib %s' % __version__,
-            'Root-Is-Purelib: %s' % is_pure,
-        ]
-        for pyver, abi, arch in self.tags:
-            wheel_metadata.append('Tag: %s-%s-%s' % (pyver, abi, arch))
-        p = os.path.join(distinfo, 'WHEEL')
-        with open(p, 'w') as f:
-            f.write('\n'.join(wheel_metadata))
-        ap = to_posix(os.path.join(info_dir, 'WHEEL'))
-        archive_paths.append((ap, p))
-
-        # Now, at last, RECORD.
-        # Paths in here are archive paths - nothing else makes sense.
-        self.write_records((distinfo, info_dir), libdir, archive_paths)
-        # Now, ready to build the zip file
-        pathname = os.path.join(self.dirname, self.filename)
-        self.build_zip(pathname, archive_paths)
-        return pathname
-
-    def install(self, paths, maker, **kwargs):
-        """
-        Install a wheel to the specified paths. If kwarg ``warner`` is
-        specified, it should be a callable, which will be called with two
-        tuples indicating the wheel version of this software and the wheel
-        version in the file, if there is a discrepancy in the versions.
-        This can be used to issue any warnings to raise any exceptions.
-        If kwarg ``lib_only`` is True, only the purelib/platlib files are
-        installed, and the headers, scripts, data and dist-info metadata are
-        not written. If kwarg ``bytecode_hashed_invalidation`` is True, written
-        bytecode will try to use file-hash based invalidation (PEP-552) on
-        supported interpreter versions (CPython 2.7+).
-
-        The return value is a :class:`InstalledDistribution` instance unless
-        ``options.lib_only`` is True, in which case the return value is ``None``.
-        """
-
-        dry_run = maker.dry_run
-        warner = kwargs.get('warner')
-        lib_only = kwargs.get('lib_only', False)
-        bc_hashed_invalidation = kwargs.get('bytecode_hashed_invalidation', False)
-
-        pathname = os.path.join(self.dirname, self.filename)
-        name_ver = '%s-%s' % (self.name, self.version)
-        data_dir = '%s.data' % name_ver
-        info_dir = '%s.dist-info' % name_ver
-
-        metadata_name = posixpath.join(info_dir, METADATA_FILENAME)
-        wheel_metadata_name = posixpath.join(info_dir, 'WHEEL')
-        record_name = posixpath.join(info_dir, 'RECORD')
-
-        wrapper = codecs.getreader('utf-8')
-
-        with ZipFile(pathname, 'r') as zf:
-            with zf.open(wheel_metadata_name) as bwf:
-                wf = wrapper(bwf)
-                message = message_from_file(wf)
-            wv = message['Wheel-Version'].split('.', 1)
-            file_version = tuple([int(i) for i in wv])
-            if (file_version != self.wheel_version) and warner:
-                warner(self.wheel_version, file_version)
-
-            if message['Root-Is-Purelib'] == 'true':
-                libdir = paths['purelib']
-            else:
-                libdir = paths['platlib']
-
-            records = {}
-            with zf.open(record_name) as bf:
-                with CSVReader(stream=bf) as reader:
-                    for row in reader:
-                        p = row[0]
-                        records[p] = row
-
-            data_pfx = posixpath.join(data_dir, '')
-            info_pfx = posixpath.join(info_dir, '')
-            script_pfx = posixpath.join(data_dir, 'scripts', '')
-
-            # make a new instance rather than a copy of maker's,
-            # as we mutate it
-            fileop = FileOperator(dry_run=dry_run)
-            fileop.record = True    # so we can rollback if needed
-
-            bc = not sys.dont_write_bytecode    # Double negatives. Lovely!
-
-            outfiles = []   # for RECORD writing
-
-            # for script copying/shebang processing
-            workdir = tempfile.mkdtemp()
-            # set target dir later
-            # we default add_launchers to False, as the
-            # Python Launcher should be used instead
-            maker.source_dir = workdir
-            maker.target_dir = None
-            try:
-                for zinfo in zf.infolist():
-                    arcname = zinfo.filename
-                    if isinstance(arcname, text_type):
-                        u_arcname = arcname
-                    else:
-                        u_arcname = arcname.decode('utf-8')
-                    # The signature file won't be in RECORD,
-                    # and we  don't currently don't do anything with it
-                    if u_arcname.endswith('/RECORD.jws'):
-                        continue
-                    row = records[u_arcname]
-                    if row[2] and str(zinfo.file_size) != row[2]:
-                        raise DistlibException('size mismatch for '
-                                               '%s' % u_arcname)
-                    if row[1]:
-                        kind, value = row[1].split('=', 1)
-                        with zf.open(arcname) as bf:
-                            data = bf.read()
-                        _, digest = self.get_hash(data, kind)
-                        if digest != value:
-                            raise DistlibException('digest mismatch for '
-                                                   '%s' % arcname)
-
-                    if lib_only and u_arcname.startswith((info_pfx, data_pfx)):
-                        logger.debug('lib_only: skipping %s', u_arcname)
-                        continue
-                    is_script = (u_arcname.startswith(script_pfx)
-                                 and not u_arcname.endswith('.exe'))
-
-                    if u_arcname.startswith(data_pfx):
-                        _, where, rp = u_arcname.split('/', 2)
-                        outfile = os.path.join(paths[where], convert_path(rp))
-                    else:
-                        # meant for site-packages.
-                        if u_arcname in (wheel_metadata_name, record_name):
-                            continue
-                        outfile = os.path.join(libdir, convert_path(u_arcname))
-                    if not is_script:
-                        with zf.open(arcname) as bf:
-                            fileop.copy_stream(bf, outfile)
-                        outfiles.append(outfile)
-                        # Double check the digest of the written file
-                        if not dry_run and row[1]:
-                            with open(outfile, 'rb') as bf:
-                                data = bf.read()
-                                _, newdigest = self.get_hash(data, kind)
-                                if newdigest != digest:
-                                    raise DistlibException('digest mismatch '
-                                                           'on write for '
-                                                           '%s' % outfile)
-                        if bc and outfile.endswith('.py'):
-                            try:
-                                pyc = fileop.byte_compile(outfile,
-                                                          hashed_invalidation=bc_hashed_invalidation)
-                                outfiles.append(pyc)
-                            except Exception:
-                                # Don't give up if byte-compilation fails,
-                                # but log it and perhaps warn the user
-                                logger.warning('Byte-compilation failed',
-                                               exc_info=True)
-                    else:
-                        fn = os.path.basename(convert_path(arcname))
-                        workname = os.path.join(workdir, fn)
-                        with zf.open(arcname) as bf:
-                            fileop.copy_stream(bf, workname)
-
-                        dn, fn = os.path.split(outfile)
-                        maker.target_dir = dn
-                        filenames = maker.make(fn)
-                        fileop.set_executable_mode(filenames)
-                        outfiles.extend(filenames)
-
-                if lib_only:
-                    logger.debug('lib_only: returning None')
-                    dist = None
-                else:
-                    # Generate scripts
-
-                    # Try to get pydist.json so we can see if there are
-                    # any commands to generate. If this fails (e.g. because
-                    # of a legacy wheel), log a warning but don't give up.
-                    commands = None
-                    file_version = self.info['Wheel-Version']
-                    if file_version == '1.0':
-                        # Use legacy info
-                        ep = posixpath.join(info_dir, 'entry_points.txt')
-                        try:
-                            with zf.open(ep) as bwf:
-                                epdata = read_exports(bwf)
-                            commands = {}
-                            for key in ('console', 'gui'):
-                                k = '%s_scripts' % key
-                                if k in epdata:
-                                    commands['wrap_%s' % key] = d = {}
-                                    for v in epdata[k].values():
-                                        s = '%s:%s' % (v.prefix, v.suffix)
-                                        if v.flags:
-                                            s += ' %s' % v.flags
-                                        d[v.name] = s
-                        except Exception:
-                            logger.warning('Unable to read legacy script '
-                                           'metadata, so cannot generate '
-                                           'scripts')
-                    else:
-                        try:
-                            with zf.open(metadata_name) as bwf:
-                                wf = wrapper(bwf)
-                                commands = json.load(wf).get('extensions')
-                                if commands:
-                                    commands = commands.get('python.commands')
-                        except Exception:
-                            logger.warning('Unable to read JSON metadata, so '
-                                           'cannot generate scripts')
-                    if commands:
-                        console_scripts = commands.get('wrap_console', {})
-                        gui_scripts = commands.get('wrap_gui', {})
-                        if console_scripts or gui_scripts:
-                            script_dir = paths.get('scripts', '')
-                            if not os.path.isdir(script_dir):
-                                raise ValueError('Valid script path not '
-                                                 'specified')
-                            maker.target_dir = script_dir
-                            for k, v in console_scripts.items():
-                                script = '%s = %s' % (k, v)
-                                filenames = maker.make(script)
-                                fileop.set_executable_mode(filenames)
-
-                            if gui_scripts:
-                                options = {'gui': True }
-                                for k, v in gui_scripts.items():
-                                    script = '%s = %s' % (k, v)
-                                    filenames = maker.make(script, options)
-                                    fileop.set_executable_mode(filenames)
-
-                    p = os.path.join(libdir, info_dir)
-                    dist = InstalledDistribution(p)
-
-                    # Write SHARED
-                    paths = dict(paths)     # don't change passed in dict
-                    del paths['purelib']
-                    del paths['platlib']
-                    paths['lib'] = libdir
-                    p = dist.write_shared_locations(paths, dry_run)
-                    if p:
-                        outfiles.append(p)
-
-                    # Write RECORD
-                    dist.write_installed_files(outfiles, paths['prefix'],
-                                               dry_run)
-                return dist
-            except Exception:  # pragma: no cover
-                logger.exception('installation failed.')
-                fileop.rollback()
-                raise
-            finally:
-                shutil.rmtree(workdir)
-
-    def _get_dylib_cache(self):
-        global cache
-        if cache is None:
-            # Use native string to avoid issues on 2.x: see Python #20140.
-            base = os.path.join(get_cache_base(), str('dylib-cache'),
-                                sys.version[:3])
-            cache = Cache(base)
-        return cache
-
-    def _get_extensions(self):
-        pathname = os.path.join(self.dirname, self.filename)
-        name_ver = '%s-%s' % (self.name, self.version)
-        info_dir = '%s.dist-info' % name_ver
-        arcname = posixpath.join(info_dir, 'EXTENSIONS')
-        wrapper = codecs.getreader('utf-8')
-        result = []
-        with ZipFile(pathname, 'r') as zf:
-            try:
-                with zf.open(arcname) as bf:
-                    wf = wrapper(bf)
-                    extensions = json.load(wf)
-                    cache = self._get_dylib_cache()
-                    prefix = cache.prefix_to_dir(pathname)
-                    cache_base = os.path.join(cache.base, prefix)
-                    if not os.path.isdir(cache_base):
-                        os.makedirs(cache_base)
-                    for name, relpath in extensions.items():
-                        dest = os.path.join(cache_base, convert_path(relpath))
-                        if not os.path.exists(dest):
-                            extract = True
-                        else:
-                            file_time = os.stat(dest).st_mtime
-                            file_time = datetime.datetime.fromtimestamp(file_time)
-                            info = zf.getinfo(relpath)
-                            wheel_time = datetime.datetime(*info.date_time)
-                            extract = wheel_time > file_time
-                        if extract:
-                            zf.extract(relpath, cache_base)
-                        result.append((name, dest))
-            except KeyError:
-                pass
-        return result
-
-    def is_compatible(self):
-        """
-        Determine if a wheel is compatible with the running system.
-        """
-        return is_compatible(self)
-
-    def is_mountable(self):
-        """
-        Determine if a wheel is asserted as mountable by its metadata.
-        """
-        return True # for now - metadata details TBD
-
-    def mount(self, append=False):
-        pathname = os.path.abspath(os.path.join(self.dirname, self.filename))
-        if not self.is_compatible():
-            msg = 'Wheel %s not compatible with this Python.' % pathname
-            raise DistlibException(msg)
-        if not self.is_mountable():
-            msg = 'Wheel %s is marked as not mountable.' % pathname
-            raise DistlibException(msg)
-        if pathname in sys.path:
-            logger.debug('%s already in path', pathname)
-        else:
-            if append:
-                sys.path.append(pathname)
-            else:
-                sys.path.insert(0, pathname)
-            extensions = self._get_extensions()
-            if extensions:
-                if _hook not in sys.meta_path:
-                    sys.meta_path.append(_hook)
-                _hook.add(pathname, extensions)
-
-    def unmount(self):
-        pathname = os.path.abspath(os.path.join(self.dirname, self.filename))
-        if pathname not in sys.path:
-            logger.debug('%s not in path', pathname)
-        else:
-            sys.path.remove(pathname)
-            if pathname in _hook.impure_wheels:
-                _hook.remove(pathname)
-            if not _hook.impure_wheels:
-                if _hook in sys.meta_path:
-                    sys.meta_path.remove(_hook)
-
-    def verify(self):
-        pathname = os.path.join(self.dirname, self.filename)
-        name_ver = '%s-%s' % (self.name, self.version)
-        data_dir = '%s.data' % name_ver
-        info_dir = '%s.dist-info' % name_ver
-
-        metadata_name = posixpath.join(info_dir, METADATA_FILENAME)
-        wheel_metadata_name = posixpath.join(info_dir, 'WHEEL')
-        record_name = posixpath.join(info_dir, 'RECORD')
-
-        wrapper = codecs.getreader('utf-8')
-
-        with ZipFile(pathname, 'r') as zf:
-            with zf.open(wheel_metadata_name) as bwf:
-                wf = wrapper(bwf)
-                message = message_from_file(wf)
-            wv = message['Wheel-Version'].split('.', 1)
-            file_version = tuple([int(i) for i in wv])
-            # TODO version verification
-
-            records = {}
-            with zf.open(record_name) as bf:
-                with CSVReader(stream=bf) as reader:
-                    for row in reader:
-                        p = row[0]
-                        records[p] = row
-
-            for zinfo in zf.infolist():
-                arcname = zinfo.filename
-                if isinstance(arcname, text_type):
-                    u_arcname = arcname
-                else:
-                    u_arcname = arcname.decode('utf-8')
-                if '..' in u_arcname:
-                    raise DistlibException('invalid entry in '
-                                           'wheel: %r' % u_arcname)
-
-                # The signature file won't be in RECORD,
-                # and we  don't currently don't do anything with it
-                if u_arcname.endswith('/RECORD.jws'):
-                    continue
-                row = records[u_arcname]
-                if row[2] and str(zinfo.file_size) != row[2]:
-                    raise DistlibException('size mismatch for '
-                                           '%s' % u_arcname)
-                if row[1]:
-                    kind, value = row[1].split('=', 1)
-                    with zf.open(arcname) as bf:
-                        data = bf.read()
-                    _, digest = self.get_hash(data, kind)
-                    if digest != value:
-                        raise DistlibException('digest mismatch for '
-                                               '%s' % arcname)
-
-    def update(self, modifier, dest_dir=None, **kwargs):
-        """
-        Update the contents of a wheel in a generic way. The modifier should
-        be a callable which expects a dictionary argument: its keys are
-        archive-entry paths, and its values are absolute filesystem paths
-        where the contents the corresponding archive entries can be found. The
-        modifier is free to change the contents of the files pointed to, add
-        new entries and remove entries, before returning. This method will
-        extract the entire contents of the wheel to a temporary location, call
-        the modifier, and then use the passed (and possibly updated)
-        dictionary to write a new wheel. If ``dest_dir`` is specified, the new
-        wheel is written there -- otherwise, the original wheel is overwritten.
-
-        The modifier should return True if it updated the wheel, else False.
-        This method returns the same value the modifier returns.
-        """
-
-        def get_version(path_map, info_dir):
-            version = path = None
-            key = '%s/%s' % (info_dir, METADATA_FILENAME)
-            if key not in path_map:
-                key = '%s/PKG-INFO' % info_dir
-            if key in path_map:
-                path = path_map[key]
-                version = Metadata(path=path).version
-            return version, path
-
-        def update_version(version, path):
-            updated = None
-            try:
-                v = NormalizedVersion(version)
-                i = version.find('-')
-                if i < 0:
-                    updated = '%s+1' % version
-                else:
-                    parts = [int(s) for s in version[i + 1:].split('.')]
-                    parts[-1] += 1
-                    updated = '%s+%s' % (version[:i],
-                                         '.'.join(str(i) for i in parts))
-            except UnsupportedVersionError:
-                logger.debug('Cannot update non-compliant (PEP-440) '
-                             'version %r', version)
-            if updated:
-                md = Metadata(path=path)
-                md.version = updated
-                legacy = not path.endswith(METADATA_FILENAME)
-                md.write(path=path, legacy=legacy)
-                logger.debug('Version updated from %r to %r', version,
-                             updated)
-
-        pathname = os.path.join(self.dirname, self.filename)
-        name_ver = '%s-%s' % (self.name, self.version)
-        info_dir = '%s.dist-info' % name_ver
-        record_name = posixpath.join(info_dir, 'RECORD')
-        with tempdir() as workdir:
-            with ZipFile(pathname, 'r') as zf:
-                path_map = {}
-                for zinfo in zf.infolist():
-                    arcname = zinfo.filename
-                    if isinstance(arcname, text_type):
-                        u_arcname = arcname
-                    else:
-                        u_arcname = arcname.decode('utf-8')
-                    if u_arcname == record_name:
-                        continue
-                    if '..' in u_arcname:
-                        raise DistlibException('invalid entry in '
-                                               'wheel: %r' % u_arcname)
-                    zf.extract(zinfo, workdir)
-                    path = os.path.join(workdir, convert_path(u_arcname))
-                    path_map[u_arcname] = path
-
-            # Remember the version.
-            original_version, _ = get_version(path_map, info_dir)
-            # Files extracted. Call the modifier.
-            modified = modifier(path_map, **kwargs)
-            if modified:
-                # Something changed - need to build a new wheel.
-                current_version, path = get_version(path_map, info_dir)
-                if current_version and (current_version == original_version):
-                    # Add or update local version to signify changes.
-                    update_version(current_version, path)
-                # Decide where the new wheel goes.
-                if dest_dir is None:
-                    fd, newpath = tempfile.mkstemp(suffix='.whl',
-                                                   prefix='wheel-update-',
-                                                   dir=workdir)
-                    os.close(fd)
-                else:
-                    if not os.path.isdir(dest_dir):
-                        raise DistlibException('Not a directory: %r' % dest_dir)
-                    newpath = os.path.join(dest_dir, self.filename)
-                archive_paths = list(path_map.items())
-                distinfo = os.path.join(workdir, info_dir)
-                info = distinfo, info_dir
-                self.write_records(info, workdir, archive_paths)
-                self.build_zip(newpath, archive_paths)
-                if dest_dir is None:
-                    shutil.copyfile(newpath, pathname)
-        return modified
-
-def compatible_tags():
-    """
-    Return (pyver, abi, arch) tuples compatible with this Python.
-    """
-    versions = [VER_SUFFIX]
-    major = VER_SUFFIX[0]
-    for minor in range(sys.version_info[1] - 1, - 1, -1):
-        versions.append(''.join([major, str(minor)]))
-
-    abis = []
-    for suffix, _, _ in imp.get_suffixes():
-        if suffix.startswith('.abi'):
-            abis.append(suffix.split('.', 2)[1])
-    abis.sort()
-    if ABI != 'none':
-        abis.insert(0, ABI)
-    abis.append('none')
-    result = []
-
-    arches = [ARCH]
-    if sys.platform == 'darwin':
-        m = re.match(r'(\w+)_(\d+)_(\d+)_(\w+)$', ARCH)
-        if m:
-            name, major, minor, arch = m.groups()
-            minor = int(minor)
-            matches = [arch]
-            if arch in ('i386', 'ppc'):
-                matches.append('fat')
-            if arch in ('i386', 'ppc', 'x86_64'):
-                matches.append('fat3')
-            if arch in ('ppc64', 'x86_64'):
-                matches.append('fat64')
-            if arch in ('i386', 'x86_64'):
-                matches.append('intel')
-            if arch in ('i386', 'x86_64', 'intel', 'ppc', 'ppc64'):
-                matches.append('universal')
-            while minor >= 0:
-                for match in matches:
-                    s = '%s_%s_%s_%s' % (name, major, minor, match)
-                    if s != ARCH:   # already there
-                        arches.append(s)
-                minor -= 1
-
-    # Most specific - our Python version, ABI and arch
-    for abi in abis:
-        for arch in arches:
-            result.append((''.join((IMP_PREFIX, versions[0])), abi, arch))
-
-    # where no ABI / arch dependency, but IMP_PREFIX dependency
-    for i, version in enumerate(versions):
-        result.append((''.join((IMP_PREFIX, version)), 'none', 'any'))
-        if i == 0:
-            result.append((''.join((IMP_PREFIX, version[0])), 'none', 'any'))
-
-    # no IMP_PREFIX, ABI or arch dependency
-    for i, version in enumerate(versions):
-        result.append((''.join(('py', version)), 'none', 'any'))
-        if i == 0:
-            result.append((''.join(('py', version[0])), 'none', 'any'))
-    return set(result)
-
-
-COMPATIBLE_TAGS = compatible_tags()
-
-del compatible_tags
-
-
-def is_compatible(wheel, tags=None):
-    if not isinstance(wheel, Wheel):
-        wheel = Wheel(wheel)    # assume it's a filename
-    result = False
-    if tags is None:
-        tags = COMPATIBLE_TAGS
-    for ver, abi, arch in tags:
-        if ver in wheel.pyver and abi in wheel.abi and arch in wheel.arch:
-            result = True
-            break
-    return result
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distro.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distro.py
deleted file mode 100644
index aa4defc..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distro.py
+++ /dev/null
@@ -1,1197 +0,0 @@
-# Copyright 2015,2016,2017 Nir Cohen
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-"""
-The ``distro`` package (``distro`` stands for Linux Distribution) provides
-information about the Linux distribution it runs on, such as a reliable
-machine-readable distro ID, or version information.
-
-It is a renewed alternative implementation for Python's original
-:py:func:`platform.linux_distribution` function, but it provides much more
-functionality. An alternative implementation became necessary because Python
-3.5 deprecated this function, and Python 3.7 is expected to remove it
-altogether. Its predecessor function :py:func:`platform.dist` was already
-deprecated since Python 2.6 and is also expected to be removed in Python 3.7.
-Still, there are many cases in which access to OS distribution information
-is needed. See `Python issue 1322 <https://bugs.python.org/issue1322>`_ for
-more information.
-"""
-
-import os
-import re
-import sys
-import json
-import shlex
-import logging
-import argparse
-import subprocess
-
-
-_UNIXCONFDIR = os.environ.get('UNIXCONFDIR', '/etc')
-_OS_RELEASE_BASENAME = 'os-release'
-
-#: Translation table for normalizing the "ID" attribute defined in os-release
-#: files, for use by the :func:`distro.id` method.
-#:
-#: * Key: Value as defined in the os-release file, translated to lower case,
-#:   with blanks translated to underscores.
-#:
-#: * Value: Normalized value.
-NORMALIZED_OS_ID = {}
-
-#: Translation table for normalizing the "Distributor ID" attribute returned by
-#: the lsb_release command, for use by the :func:`distro.id` method.
-#:
-#: * Key: Value as returned by the lsb_release command, translated to lower
-#:   case, with blanks translated to underscores.
-#:
-#: * Value: Normalized value.
-NORMALIZED_LSB_ID = {
-    'enterpriseenterprise': 'oracle',  # Oracle Enterprise Linux
-    'redhatenterpriseworkstation': 'rhel',  # RHEL 6, 7 Workstation
-    'redhatenterpriseserver': 'rhel',  # RHEL 6, 7 Server
-}
-
-#: Translation table for normalizing the distro ID derived from the file name
-#: of distro release files, for use by the :func:`distro.id` method.
-#:
-#: * Key: Value as derived from the file name of a distro release file,
-#:   translated to lower case, with blanks translated to underscores.
-#:
-#: * Value: Normalized value.
-NORMALIZED_DISTRO_ID = {
-    'redhat': 'rhel',  # RHEL 6.x, 7.x
-}
-
-# Pattern for content of distro release file (reversed)
-_DISTRO_RELEASE_CONTENT_REVERSED_PATTERN = re.compile(
-    r'(?:[^)]*\)(.*)\()? *(?:STL )?([\d.+\-a-z]*\d) *(?:esaeler *)?(.+)')
-
-# Pattern for base file name of distro release file
-_DISTRO_RELEASE_BASENAME_PATTERN = re.compile(
-    r'(\w+)[-_](release|version)$')
-
-# Base file names to be ignored when searching for distro release file
-_DISTRO_RELEASE_IGNORE_BASENAMES = (
-    'debian_version',
-    'lsb-release',
-    'oem-release',
-    _OS_RELEASE_BASENAME,
-    'system-release'
-)
-
-
-def linux_distribution(full_distribution_name=True):
-    """
-    Return information about the current OS distribution as a tuple
-    ``(id_name, version, codename)`` with items as follows:
-
-    * ``id_name``:  If *full_distribution_name* is false, the result of
-      :func:`distro.id`. Otherwise, the result of :func:`distro.name`.
-
-    * ``version``:  The result of :func:`distro.version`.
-
-    * ``codename``:  The result of :func:`distro.codename`.
-
-    The interface of this function is compatible with the original
-    :py:func:`platform.linux_distribution` function, supporting a subset of
-    its parameters.
-
-    The data it returns may not exactly be the same, because it uses more data
-    sources than the original function, and that may lead to different data if
-    the OS distribution is not consistent across multiple data sources it
-    provides (there are indeed such distributions ...).
-
-    Another reason for differences is the fact that the :func:`distro.id`
-    method normalizes the distro ID string to a reliable machine-readable value
-    for a number of popular OS distributions.
-    """
-    return _distro.linux_distribution(full_distribution_name)
-
-
-def id():
-    """
-    Return the distro ID of the current distribution, as a
-    machine-readable string.
-
-    For a number of OS distributions, the returned distro ID value is
-    *reliable*, in the sense that it is documented and that it does not change
-    across releases of the distribution.
-
-    This package maintains the following reliable distro ID values:
-
-    ==============  =========================================
-    Distro ID       Distribution
-    ==============  =========================================
-    "ubuntu"        Ubuntu
-    "debian"        Debian
-    "rhel"          RedHat Enterprise Linux
-    "centos"        CentOS
-    "fedora"        Fedora
-    "sles"          SUSE Linux Enterprise Server
-    "opensuse"      openSUSE
-    "amazon"        Amazon Linux
-    "arch"          Arch Linux
-    "cloudlinux"    CloudLinux OS
-    "exherbo"       Exherbo Linux
-    "gentoo"        GenToo Linux
-    "ibm_powerkvm"  IBM PowerKVM
-    "kvmibm"        KVM for IBM z Systems
-    "linuxmint"     Linux Mint
-    "mageia"        Mageia
-    "mandriva"      Mandriva Linux
-    "parallels"     Parallels
-    "pidora"        Pidora
-    "raspbian"      Raspbian
-    "oracle"        Oracle Linux (and Oracle Enterprise Linux)
-    "scientific"    Scientific Linux
-    "slackware"     Slackware
-    "xenserver"     XenServer
-    "openbsd"       OpenBSD
-    "netbsd"        NetBSD
-    "freebsd"       FreeBSD
-    ==============  =========================================
-
-    If you have a need to get distros for reliable IDs added into this set,
-    or if you find that the :func:`distro.id` function returns a different
-    distro ID for one of the listed distros, please create an issue in the
-    `distro issue tracker`_.
-
-    **Lookup hierarchy and transformations:**
-
-    First, the ID is obtained from the following sources, in the specified
-    order. The first available and non-empty value is used:
-
-    * the value of the "ID" attribute of the os-release file,
-
-    * the value of the "Distributor ID" attribute returned by the lsb_release
-      command,
-
-    * the first part of the file name of the distro release file,
-
-    The so determined ID value then passes the following transformations,
-    before it is returned by this method:
-
-    * it is translated to lower case,
-
-    * blanks (which should not be there anyway) are translated to underscores,
-
-    * a normalization of the ID is performed, based upon
-      `normalization tables`_. The purpose of this normalization is to ensure
-      that the ID is as reliable as possible, even across incompatible changes
-      in the OS distributions. A common reason for an incompatible change is
-      the addition of an os-release file, or the addition of the lsb_release
-      command, with ID values that differ from what was previously determined
-      from the distro release file name.
-    """
-    return _distro.id()
-
-
-def name(pretty=False):
-    """
-    Return the name of the current OS distribution, as a human-readable
-    string.
-
-    If *pretty* is false, the name is returned without version or codename.
-    (e.g. "CentOS Linux")
-
-    If *pretty* is true, the version and codename are appended.
-    (e.g. "CentOS Linux 7.1.1503 (Core)")
-
-    **Lookup hierarchy:**
-
-    The name is obtained from the following sources, in the specified order.
-    The first available and non-empty value is used:
-
-    * If *pretty* is false:
-
-      - the value of the "NAME" attribute of the os-release file,
-
-      - the value of the "Distributor ID" attribute returned by the lsb_release
-        command,
-
-      - the value of the "<name>" field of the distro release file.
-
-    * If *pretty* is true:
-
-      - the value of the "PRETTY_NAME" attribute of the os-release file,
-
-      - the value of the "Description" attribute returned by the lsb_release
-        command,
-
-      - the value of the "<name>" field of the distro release file, appended
-        with the value of the pretty version ("<version_id>" and "<codename>"
-        fields) of the distro release file, if available.
-    """
-    return _distro.name(pretty)
-
-
-def version(pretty=False, best=False):
-    """
-    Return the version of the current OS distribution, as a human-readable
-    string.
-
-    If *pretty* is false, the version is returned without codename (e.g.
-    "7.0").
-
-    If *pretty* is true, the codename in parenthesis is appended, if the
-    codename is non-empty (e.g. "7.0 (Maipo)").
-
-    Some distributions provide version numbers with different precisions in
-    the different sources of distribution information. Examining the different
-    sources in a fixed priority order does not always yield the most precise
-    version (e.g. for Debian 8.2, or CentOS 7.1).
-
-    The *best* parameter can be used to control the approach for the returned
-    version:
-
-    If *best* is false, the first non-empty version number in priority order of
-    the examined sources is returned.
-
-    If *best* is true, the most precise version number out of all examined
-    sources is returned.
-
-    **Lookup hierarchy:**
-
-    In all cases, the version number is obtained from the following sources.
-    If *best* is false, this order represents the priority order:
-
-    * the value of the "VERSION_ID" attribute of the os-release file,
-    * the value of the "Release" attribute returned by the lsb_release
-      command,
-    * the version number parsed from the "<version_id>" field of the first line
-      of the distro release file,
-    * the version number parsed from the "PRETTY_NAME" attribute of the
-      os-release file, if it follows the format of the distro release files.
-    * the version number parsed from the "Description" attribute returned by
-      the lsb_release command, if it follows the format of the distro release
-      files.
-    """
-    return _distro.version(pretty, best)
-
-
-def version_parts(best=False):
-    """
-    Return the version of the current OS distribution as a tuple
-    ``(major, minor, build_number)`` with items as follows:
-
-    * ``major``:  The result of :func:`distro.major_version`.
-
-    * ``minor``:  The result of :func:`distro.minor_version`.
-
-    * ``build_number``:  The result of :func:`distro.build_number`.
-
-    For a description of the *best* parameter, see the :func:`distro.version`
-    method.
-    """
-    return _distro.version_parts(best)
-
-
-def major_version(best=False):
-    """
-    Return the major version of the current OS distribution, as a string,
-    if provided.
-    Otherwise, the empty string is returned. The major version is the first
-    part of the dot-separated version string.
-
-    For a description of the *best* parameter, see the :func:`distro.version`
-    method.
-    """
-    return _distro.major_version(best)
-
-
-def minor_version(best=False):
-    """
-    Return the minor version of the current OS distribution, as a string,
-    if provided.
-    Otherwise, the empty string is returned. The minor version is the second
-    part of the dot-separated version string.
-
-    For a description of the *best* parameter, see the :func:`distro.version`
-    method.
-    """
-    return _distro.minor_version(best)
-
-
-def build_number(best=False):
-    """
-    Return the build number of the current OS distribution, as a string,
-    if provided.
-    Otherwise, the empty string is returned. The build number is the third part
-    of the dot-separated version string.
-
-    For a description of the *best* parameter, see the :func:`distro.version`
-    method.
-    """
-    return _distro.build_number(best)
-
-
-def like():
-    """
-    Return a space-separated list of distro IDs of distributions that are
-    closely related to the current OS distribution in regards to packaging
-    and programming interfaces, for example distributions the current
-    distribution is a derivative from.
-
-    **Lookup hierarchy:**
-
-    This information item is only provided by the os-release file.
-    For details, see the description of the "ID_LIKE" attribute in the
-    `os-release man page
-    <http://www.freedesktop.org/software/systemd/man/os-release.html>`_.
-    """
-    return _distro.like()
-
-
-def codename():
-    """
-    Return the codename for the release of the current OS distribution,
-    as a string.
-
-    If the distribution does not have a codename, an empty string is returned.
-
-    Note that the returned codename is not always really a codename. For
-    example, openSUSE returns "x86_64". This function does not handle such
-    cases in any special way and just returns the string it finds, if any.
-
-    **Lookup hierarchy:**
-
-    * the codename within the "VERSION" attribute of the os-release file, if
-      provided,
-
-    * the value of the "Codename" attribute returned by the lsb_release
-      command,
-
-    * the value of the "<codename>" field of the distro release file.
-    """
-    return _distro.codename()
-
-
-def info(pretty=False, best=False):
-    """
-    Return certain machine-readable information items about the current OS
-    distribution in a dictionary, as shown in the following example:
-
-    .. sourcecode:: python
-
-        {
-            'id': 'rhel',
-            'version': '7.0',
-            'version_parts': {
-                'major': '7',
-                'minor': '0',
-                'build_number': ''
-            },
-            'like': 'fedora',
-            'codename': 'Maipo'
-        }
-
-    The dictionary structure and keys are always the same, regardless of which
-    information items are available in the underlying data sources. The values
-    for the various keys are as follows:
-
-    * ``id``:  The result of :func:`distro.id`.
-
-    * ``version``:  The result of :func:`distro.version`.
-
-    * ``version_parts -> major``:  The result of :func:`distro.major_version`.
-
-    * ``version_parts -> minor``:  The result of :func:`distro.minor_version`.
-
-    * ``version_parts -> build_number``:  The result of
-      :func:`distro.build_number`.
-
-    * ``like``:  The result of :func:`distro.like`.
-
-    * ``codename``:  The result of :func:`distro.codename`.
-
-    For a description of the *pretty* and *best* parameters, see the
-    :func:`distro.version` method.
-    """
-    return _distro.info(pretty, best)
-
-
-def os_release_info():
-    """
-    Return a dictionary containing key-value pairs for the information items
-    from the os-release file data source of the current OS distribution.
-
-    See `os-release file`_ for details about these information items.
-    """
-    return _distro.os_release_info()
-
-
-def lsb_release_info():
-    """
-    Return a dictionary containing key-value pairs for the information items
-    from the lsb_release command data source of the current OS distribution.
-
-    See `lsb_release command output`_ for details about these information
-    items.
-    """
-    return _distro.lsb_release_info()
-
-
-def distro_release_info():
-    """
-    Return a dictionary containing key-value pairs for the information items
-    from the distro release file data source of the current OS distribution.
-
-    See `distro release file`_ for details about these information items.
-    """
-    return _distro.distro_release_info()
-
-
-def uname_info():
-    """
-    Return a dictionary containing key-value pairs for the information items
-    from the distro release file data source of the current OS distribution.
-    """
-    return _distro.uname_info()
-
-
-def os_release_attr(attribute):
-    """
-    Return a single named information item from the os-release file data source
-    of the current OS distribution.
-
-    Parameters:
-
-    * ``attribute`` (string): Key of the information item.
-
-    Returns:
-
-    * (string): Value of the information item, if the item exists.
-      The empty string, if the item does not exist.
-
-    See `os-release file`_ for details about these information items.
-    """
-    return _distro.os_release_attr(attribute)
-
-
-def lsb_release_attr(attribute):
-    """
-    Return a single named information item from the lsb_release command output
-    data source of the current OS distribution.
-
-    Parameters:
-
-    * ``attribute`` (string): Key of the information item.
-
-    Returns:
-
-    * (string): Value of the information item, if the item exists.
-      The empty string, if the item does not exist.
-
-    See `lsb_release command output`_ for details about these information
-    items.
-    """
-    return _distro.lsb_release_attr(attribute)
-
-
-def distro_release_attr(attribute):
-    """
-    Return a single named information item from the distro release file
-    data source of the current OS distribution.
-
-    Parameters:
-
-    * ``attribute`` (string): Key of the information item.
-
-    Returns:
-
-    * (string): Value of the information item, if the item exists.
-      The empty string, if the item does not exist.
-
-    See `distro release file`_ for details about these information items.
-    """
-    return _distro.distro_release_attr(attribute)
-
-
-def uname_attr(attribute):
-    """
-    Return a single named information item from the distro release file
-    data source of the current OS distribution.
-
-    Parameters:
-
-    * ``attribute`` (string): Key of the information item.
-
-    Returns:
-
-    * (string): Value of the information item, if the item exists.
-                The empty string, if the item does not exist.
-    """
-    return _distro.uname_attr(attribute)
-
-
-class cached_property(object):
-    """A version of @property which caches the value.  On access, it calls the
-    underlying function and sets the value in `__dict__` so future accesses
-    will not re-call the property.
-    """
-    def __init__(self, f):
-        self._fname = f.__name__
-        self._f = f
-
-    def __get__(self, obj, owner):
-        assert obj is not None, 'call {} on an instance'.format(self._fname)
-        ret = obj.__dict__[self._fname] = self._f(obj)
-        return ret
-
-
-class LinuxDistribution(object):
-    """
-    Provides information about a OS distribution.
-
-    This package creates a private module-global instance of this class with
-    default initialization arguments, that is used by the
-    `consolidated accessor functions`_ and `single source accessor functions`_.
-    By using default initialization arguments, that module-global instance
-    returns data about the current OS distribution (i.e. the distro this
-    package runs on).
-
-    Normally, it is not necessary to create additional instances of this class.
-    However, in situations where control is needed over the exact data sources
-    that are used, instances of this class can be created with a specific
-    distro release file, or a specific os-release file, or without invoking the
-    lsb_release command.
-    """
-
-    def __init__(self,
-                 include_lsb=True,
-                 os_release_file='',
-                 distro_release_file='',
-                 include_uname=True):
-        """
-        The initialization method of this class gathers information from the
-        available data sources, and stores that in private instance attributes.
-        Subsequent access to the information items uses these private instance
-        attributes, so that the data sources are read only once.
-
-        Parameters:
-
-        * ``include_lsb`` (bool): Controls whether the
-          `lsb_release command output`_ is included as a data source.
-
-          If the lsb_release command is not available in the program execution
-          path, the data source for the lsb_release command will be empty.
-
-        * ``os_release_file`` (string): The path name of the
-          `os-release file`_ that is to be used as a data source.
-
-          An empty string (the default) will cause the default path name to
-          be used (see `os-release file`_ for details).
-
-          If the specified or defaulted os-release file does not exist, the
-          data source for the os-release file will be empty.
-
-        * ``distro_release_file`` (string): The path name of the
-          `distro release file`_ that is to be used as a data source.
-
-          An empty string (the default) will cause a default search algorithm
-          to be used (see `distro release file`_ for details).
-
-          If the specified distro release file does not exist, or if no default
-          distro release file can be found, the data source for the distro
-          release file will be empty.
-
-        * ``include_name`` (bool): Controls whether uname command output is
-          included as a data source. If the uname command is not available in
-          the program execution path the data source for the uname command will
-          be empty.
-
-        Public instance attributes:
-
-        * ``os_release_file`` (string): The path name of the
-          `os-release file`_ that is actually used as a data source. The
-          empty string if no distro release file is used as a data source.
-
-        * ``distro_release_file`` (string): The path name of the
-          `distro release file`_ that is actually used as a data source. The
-          empty string if no distro release file is used as a data source.
-
-        * ``include_lsb`` (bool): The result of the ``include_lsb`` parameter.
-          This controls whether the lsb information will be loaded.
-
-        * ``include_uname`` (bool): The result of the ``include_uname``
-          parameter. This controls whether the uname information will
-          be loaded.
-
-        Raises:
-
-        * :py:exc:`IOError`: Some I/O issue with an os-release file or distro
-          release file.
-
-        * :py:exc:`subprocess.CalledProcessError`: The lsb_release command had
-          some issue (other than not being available in the program execution
-          path).
-
-        * :py:exc:`UnicodeError`: A data source has unexpected characters or
-          uses an unexpected encoding.
-        """
-        self.os_release_file = os_release_file or \
-            os.path.join(_UNIXCONFDIR, _OS_RELEASE_BASENAME)
-        self.distro_release_file = distro_release_file or ''  # updated later
-        self.include_lsb = include_lsb
-        self.include_uname = include_uname
-
-    def __repr__(self):
-        """Return repr of all info
-        """
-        return \
-            "LinuxDistribution(" \
-            "os_release_file={self.os_release_file!r}, " \
-            "distro_release_file={self.distro_release_file!r}, " \
-            "include_lsb={self.include_lsb!r}, " \
-            "include_uname={self.include_uname!r}, " \
-            "_os_release_info={self._os_release_info!r}, " \
-            "_lsb_release_info={self._lsb_release_info!r}, " \
-            "_distro_release_info={self._distro_release_info!r}, " \
-            "_uname_info={self._uname_info!r})".format(
-                self=self)
-
-    def linux_distribution(self, full_distribution_name=True):
-        """
-        Return information about the OS distribution that is compatible
-        with Python's :func:`platform.linux_distribution`, supporting a subset
-        of its parameters.
-
-        For details, see :func:`distro.linux_distribution`.
-        """
-        return (
-            self.name() if full_distribution_name else self.id(),
-            self.version(),
-            self.codename()
-        )
-
-    def id(self):
-        """Return the distro ID of the OS distribution, as a string.
-
-        For details, see :func:`distro.id`.
-        """
-        def normalize(distro_id, table):
-            distro_id = distro_id.lower().replace(' ', '_')
-            return table.get(distro_id, distro_id)
-
-        distro_id = self.os_release_attr('id')
-        if distro_id:
-            return normalize(distro_id, NORMALIZED_OS_ID)
-
-        distro_id = self.lsb_release_attr('distributor_id')
-        if distro_id:
-            return normalize(distro_id, NORMALIZED_LSB_ID)
-
-        distro_id = self.distro_release_attr('id')
-        if distro_id:
-            return normalize(distro_id, NORMALIZED_DISTRO_ID)
-
-        distro_id = self.uname_attr('id')
-        if distro_id:
-            return normalize(distro_id, NORMALIZED_DISTRO_ID)
-
-        return ''
-
-    def name(self, pretty=False):
-        """
-        Return the name of the OS distribution, as a string.
-
-        For details, see :func:`distro.name`.
-        """
-        name = self.os_release_attr('name') \
-            or self.lsb_release_attr('distributor_id') \
-            or self.distro_release_attr('name') \
-            or self.uname_attr('name')
-        if pretty:
-            name = self.os_release_attr('pretty_name') \
-                or self.lsb_release_attr('description')
-            if not name:
-                name = self.distro_release_attr('name') \
-                       or self.uname_attr('name')
-                version = self.version(pretty=True)
-                if version:
-                    name = name + ' ' + version
-        return name or ''
-
-    def version(self, pretty=False, best=False):
-        """
-        Return the version of the OS distribution, as a string.
-
-        For details, see :func:`distro.version`.
-        """
-        versions = [
-            self.os_release_attr('version_id'),
-            self.lsb_release_attr('release'),
-            self.distro_release_attr('version_id'),
-            self._parse_distro_release_content(
-                self.os_release_attr('pretty_name')).get('version_id', ''),
-            self._parse_distro_release_content(
-                self.lsb_release_attr('description')).get('version_id', ''),
-            self.uname_attr('release')
-        ]
-        version = ''
-        if best:
-            # This algorithm uses the last version in priority order that has
-            # the best precision. If the versions are not in conflict, that
-            # does not matter; otherwise, using the last one instead of the
-            # first one might be considered a surprise.
-            for v in versions:
-                if v.count(".") > version.count(".") or version == '':
-                    version = v
-        else:
-            for v in versions:
-                if v != '':
-                    version = v
-                    break
-        if pretty and version and self.codename():
-            version = u'{0} ({1})'.format(version, self.codename())
-        return version
-
-    def version_parts(self, best=False):
-        """
-        Return the version of the OS distribution, as a tuple of version
-        numbers.
-
-        For details, see :func:`distro.version_parts`.
-        """
-        version_str = self.version(best=best)
-        if version_str:
-            version_regex = re.compile(r'(\d+)\.?(\d+)?\.?(\d+)?')
-            matches = version_regex.match(version_str)
-            if matches:
-                major, minor, build_number = matches.groups()
-                return major, minor or '', build_number or ''
-        return '', '', ''
-
-    def major_version(self, best=False):
-        """
-        Return the major version number of the current distribution.
-
-        For details, see :func:`distro.major_version`.
-        """
-        return self.version_parts(best)[0]
-
-    def minor_version(self, best=False):
-        """
-        Return the minor version number of the current distribution.
-
-        For details, see :func:`distro.minor_version`.
-        """
-        return self.version_parts(best)[1]
-
-    def build_number(self, best=False):
-        """
-        Return the build number of the current distribution.
-
-        For details, see :func:`distro.build_number`.
-        """
-        return self.version_parts(best)[2]
-
-    def like(self):
-        """
-        Return the IDs of distributions that are like the OS distribution.
-
-        For details, see :func:`distro.like`.
-        """
-        return self.os_release_attr('id_like') or ''
-
-    def codename(self):
-        """
-        Return the codename of the OS distribution.
-
-        For details, see :func:`distro.codename`.
-        """
-        return self.os_release_attr('codename') \
-            or self.lsb_release_attr('codename') \
-            or self.distro_release_attr('codename') \
-            or ''
-
-    def info(self, pretty=False, best=False):
-        """
-        Return certain machine-readable information about the OS
-        distribution.
-
-        For details, see :func:`distro.info`.
-        """
-        return dict(
-            id=self.id(),
-            version=self.version(pretty, best),
-            version_parts=dict(
-                major=self.major_version(best),
-                minor=self.minor_version(best),
-                build_number=self.build_number(best)
-            ),
-            like=self.like(),
-            codename=self.codename(),
-        )
-
-    def os_release_info(self):
-        """
-        Return a dictionary containing key-value pairs for the information
-        items from the os-release file data source of the OS distribution.
-
-        For details, see :func:`distro.os_release_info`.
-        """
-        return self._os_release_info
-
-    def lsb_release_info(self):
-        """
-        Return a dictionary containing key-value pairs for the information
-        items from the lsb_release command data source of the OS
-        distribution.
-
-        For details, see :func:`distro.lsb_release_info`.
-        """
-        return self._lsb_release_info
-
-    def distro_release_info(self):
-        """
-        Return a dictionary containing key-value pairs for the information
-        items from the distro release file data source of the OS
-        distribution.
-
-        For details, see :func:`distro.distro_release_info`.
-        """
-        return self._distro_release_info
-
-    def uname_info(self):
-        """
-        Return a dictionary containing key-value pairs for the information
-        items from the uname command data source of the OS distribution.
-
-        For details, see :func:`distro.uname_info`.
-        """
-
-    def os_release_attr(self, attribute):
-        """
-        Return a single named information item from the os-release file data
-        source of the OS distribution.
-
-        For details, see :func:`distro.os_release_attr`.
-        """
-        return self._os_release_info.get(attribute, '')
-
-    def lsb_release_attr(self, attribute):
-        """
-        Return a single named information item from the lsb_release command
-        output data source of the OS distribution.
-
-        For details, see :func:`distro.lsb_release_attr`.
-        """
-        return self._lsb_release_info.get(attribute, '')
-
-    def distro_release_attr(self, attribute):
-        """
-        Return a single named information item from the distro release file
-        data source of the OS distribution.
-
-        For details, see :func:`distro.distro_release_attr`.
-        """
-        return self._distro_release_info.get(attribute, '')
-
-    def uname_attr(self, attribute):
-        """
-        Return a single named information item from the uname command
-        output data source of the OS distribution.
-
-        For details, see :func:`distro.uname_release_attr`.
-        """
-        return self._uname_info.get(attribute, '')
-
-    @cached_property
-    def _os_release_info(self):
-        """
-        Get the information items from the specified os-release file.
-
-        Returns:
-            A dictionary containing all information items.
-        """
-        if os.path.isfile(self.os_release_file):
-            with open(self.os_release_file) as release_file:
-                return self._parse_os_release_content(release_file)
-        return {}
-
-    @staticmethod
-    def _parse_os_release_content(lines):
-        """
-        Parse the lines of an os-release file.
-
-        Parameters:
-
-        * lines: Iterable through the lines in the os-release file.
-                 Each line must be a unicode string or a UTF-8 encoded byte
-                 string.
-
-        Returns:
-            A dictionary containing all information items.
-        """
-        props = {}
-        lexer = shlex.shlex(lines, posix=True)
-        lexer.whitespace_split = True
-
-        # The shlex module defines its `wordchars` variable using literals,
-        # making it dependent on the encoding of the Python source file.
-        # In Python 2.6 and 2.7, the shlex source file is encoded in
-        # 'iso-8859-1', and the `wordchars` variable is defined as a byte
-        # string. This causes a UnicodeDecodeError to be raised when the
-        # parsed content is a unicode object. The following fix resolves that
-        # (... but it should be fixed in shlex...):
-        if sys.version_info[0] == 2 and isinstance(lexer.wordchars, bytes):
-            lexer.wordchars = lexer.wordchars.decode('iso-8859-1')
-
-        tokens = list(lexer)
-        for token in tokens:
-            # At this point, all shell-like parsing has been done (i.e.
-            # comments processed, quotes and backslash escape sequences
-            # processed, multi-line values assembled, trailing newlines
-            # stripped, etc.), so the tokens are now either:
-            # * variable assignments: var=value
-            # * commands or their arguments (not allowed in os-release)
-            if '=' in token:
-                k, v = token.split('=', 1)
-                if isinstance(v, bytes):
-                    v = v.decode('utf-8')
-                props[k.lower()] = v
-                if k == 'VERSION':
-                    # this handles cases in which the codename is in
-                    # the `(CODENAME)` (rhel, centos, fedora) format
-                    # or in the `, CODENAME` format (Ubuntu).
-                    codename = re.search(r'(\(\D+\))|,(\s+)?\D+', v)
-                    if codename:
-                        codename = codename.group()
-                        codename = codename.strip('()')
-                        codename = codename.strip(',')
-                        codename = codename.strip()
-                        # codename appears within paranthese.
-                        props['codename'] = codename
-                    else:
-                        props['codename'] = ''
-            else:
-                # Ignore any tokens that are not variable assignments
-                pass
-        return props
-
-    @cached_property
-    def _lsb_release_info(self):
-        """
-        Get the information items from the lsb_release command output.
-
-        Returns:
-            A dictionary containing all information items.
-        """
-        if not self.include_lsb:
-            return {}
-        with open(os.devnull, 'w') as devnull:
-            try:
-                cmd = ('lsb_release', '-a')
-                stdout = subprocess.check_output(cmd, stderr=devnull)
-            except OSError:  # Command not found
-                return {}
-        content = stdout.decode(sys.getfilesystemencoding()).splitlines()
-        return self._parse_lsb_release_content(content)
-
-    @staticmethod
-    def _parse_lsb_release_content(lines):
-        """
-        Parse the output of the lsb_release command.
-
-        Parameters:
-
-        * lines: Iterable through the lines of the lsb_release output.
-                 Each line must be a unicode string or a UTF-8 encoded byte
-                 string.
-
-        Returns:
-            A dictionary containing all information items.
-        """
-        props = {}
-        for line in lines:
-            kv = line.strip('\n').split(':', 1)
-            if len(kv) != 2:
-                # Ignore lines without colon.
-                continue
-            k, v = kv
-            props.update({k.replace(' ', '_').lower(): v.strip()})
-        return props
-
-    @cached_property
-    def _uname_info(self):
-        with open(os.devnull, 'w') as devnull:
-            try:
-                cmd = ('uname', '-rs')
-                stdout = subprocess.check_output(cmd, stderr=devnull)
-            except OSError:
-                return {}
-        content = stdout.decode(sys.getfilesystemencoding()).splitlines()
-        return self._parse_uname_content(content)
-
-    @staticmethod
-    def _parse_uname_content(lines):
-        props = {}
-        match = re.search(r'^([^\s]+)\s+([\d\.]+)', lines[0].strip())
-        if match:
-            name, version = match.groups()
-
-            # This is to prevent the Linux kernel version from
-            # appearing as the 'best' version on otherwise
-            # identifiable distributions.
-            if name == 'Linux':
-                return {}
-            props['id'] = name.lower()
-            props['name'] = name
-            props['release'] = version
-        return props
-
-    @cached_property
-    def _distro_release_info(self):
-        """
-        Get the information items from the specified distro release file.
-
-        Returns:
-            A dictionary containing all information items.
-        """
-        if self.distro_release_file:
-            # If it was specified, we use it and parse what we can, even if
-            # its file name or content does not match the expected pattern.
-            distro_info = self._parse_distro_release_file(
-                self.distro_release_file)
-            basename = os.path.basename(self.distro_release_file)
-            # The file name pattern for user-specified distro release files
-            # is somewhat more tolerant (compared to when searching for the
-            # file), because we want to use what was specified as best as
-            # possible.
-            match = _DISTRO_RELEASE_BASENAME_PATTERN.match(basename)
-            if match:
-                distro_info['id'] = match.group(1)
-            return distro_info
-        else:
-            try:
-                basenames = os.listdir(_UNIXCONFDIR)
-                # We sort for repeatability in cases where there are multiple
-                # distro specific files; e.g. CentOS, Oracle, Enterprise all
-                # containing `redhat-release` on top of their own.
-                basenames.sort()
-            except OSError:
-                # This may occur when /etc is not readable but we can't be
-                # sure about the *-release files. Check common entries of
-                # /etc for information. If they turn out to not be there the
-                # error is handled in `_parse_distro_release_file()`.
-                basenames = ['SuSE-release',
-                             'arch-release',
-                             'base-release',
-                             'centos-release',
-                             'fedora-release',
-                             'gentoo-release',
-                             'mageia-release',
-                             'mandrake-release',
-                             'mandriva-release',
-                             'mandrivalinux-release',
-                             'manjaro-release',
-                             'oracle-release',
-                             'redhat-release',
-                             'sl-release',
-                             'slackware-version']
-            for basename in basenames:
-                if basename in _DISTRO_RELEASE_IGNORE_BASENAMES:
-                    continue
-                match = _DISTRO_RELEASE_BASENAME_PATTERN.match(basename)
-                if match:
-                    filepath = os.path.join(_UNIXCONFDIR, basename)
-                    distro_info = self._parse_distro_release_file(filepath)
-                    if 'name' in distro_info:
-                        # The name is always present if the pattern matches
-                        self.distro_release_file = filepath
-                        distro_info['id'] = match.group(1)
-                        return distro_info
-            return {}
-
-    def _parse_distro_release_file(self, filepath):
-        """
-        Parse a distro release file.
-
-        Parameters:
-
-        * filepath: Path name of the distro release file.
-
-        Returns:
-            A dictionary containing all information items.
-        """
-        try:
-            with open(filepath) as fp:
-                # Only parse the first line. For instance, on SLES there
-                # are multiple lines. We don't want them...
-                return self._parse_distro_release_content(fp.readline())
-        except (OSError, IOError):
-            # Ignore not being able to read a specific, seemingly version
-            # related file.
-            # See https://github.com/nir0s/distro/issues/162
-            return {}
-
-    @staticmethod
-    def _parse_distro_release_content(line):
-        """
-        Parse a line from a distro release file.
-
-        Parameters:
-        * line: Line from the distro release file. Must be a unicode string
-                or a UTF-8 encoded byte string.
-
-        Returns:
-            A dictionary containing all information items.
-        """
-        if isinstance(line, bytes):
-            line = line.decode('utf-8')
-        matches = _DISTRO_RELEASE_CONTENT_REVERSED_PATTERN.match(
-            line.strip()[::-1])
-        distro_info = {}
-        if matches:
-            # regexp ensures non-None
-            distro_info['name'] = matches.group(3)[::-1]
-            if matches.group(2):
-                distro_info['version_id'] = matches.group(2)[::-1]
-            if matches.group(1):
-                distro_info['codename'] = matches.group(1)[::-1]
-        elif line:
-            distro_info['name'] = line.strip()
-        return distro_info
-
-
-_distro = LinuxDistribution()
-
-
-def main():
-    logger = logging.getLogger(__name__)
-    logger.setLevel(logging.DEBUG)
-    logger.addHandler(logging.StreamHandler(sys.stdout))
-
-    parser = argparse.ArgumentParser(description="OS distro info tool")
-    parser.add_argument(
-        '--json',
-        '-j',
-        help="Output in machine readable format",
-        action="store_true")
-    args = parser.parse_args()
-
-    if args.json:
-        logger.info(json.dumps(info(), indent=4, sort_keys=True))
-    else:
-        logger.info('Name: %s', name(pretty=True))
-        distribution_version = version(pretty=True)
-        logger.info('Version: %s', distribution_version)
-        distribution_codename = codename()
-        logger.info('Codename: %s', distribution_codename)
-
-
-if __name__ == '__main__':
-    main()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/__init__.py
deleted file mode 100644
index 0491234..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/__init__.py
+++ /dev/null
@@ -1,35 +0,0 @@
-"""
-HTML parsing library based on the `WHATWG HTML specification
-<https://whatwg.org/html>`_. The parser is designed to be compatible with
-existing HTML found in the wild and implements well-defined error recovery that
-is largely compatible with modern desktop web browsers.
-
-Example usage::
-
-    from pip._vendor import html5lib
-    with open("my_document.html", "rb") as f:
-        tree = html5lib.parse(f)
-
-For convenience, this module re-exports the following names:
-
-* :func:`~.html5parser.parse`
-* :func:`~.html5parser.parseFragment`
-* :class:`~.html5parser.HTMLParser`
-* :func:`~.treebuilders.getTreeBuilder`
-* :func:`~.treewalkers.getTreeWalker`
-* :func:`~.serializer.serialize`
-"""
-
-from __future__ import absolute_import, division, unicode_literals
-
-from .html5parser import HTMLParser, parse, parseFragment
-from .treebuilders import getTreeBuilder
-from .treewalkers import getTreeWalker
-from .serializer import serialize
-
-__all__ = ["HTMLParser", "parse", "parseFragment", "getTreeBuilder",
-           "getTreeWalker", "serialize"]
-
-# this has to be at the top level, see how setup.py parses this
-#: Distribution version number.
-__version__ = "1.0.1"
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/_ihatexml.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/_ihatexml.py
deleted file mode 100644
index 4c77717..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/_ihatexml.py
+++ /dev/null
@@ -1,288 +0,0 @@
-from __future__ import absolute_import, division, unicode_literals
-
-import re
-import warnings
-
-from .constants import DataLossWarning
-
-baseChar = """
-[#x0041-#x005A] | [#x0061-#x007A] | [#x00C0-#x00D6] | [#x00D8-#x00F6] |
-[#x00F8-#x00FF] | [#x0100-#x0131] | [#x0134-#x013E] | [#x0141-#x0148] |
-[#x014A-#x017E] | [#x0180-#x01C3] | [#x01CD-#x01F0] | [#x01F4-#x01F5] |
-[#x01FA-#x0217] | [#x0250-#x02A8] | [#x02BB-#x02C1] | #x0386 |
-[#x0388-#x038A] | #x038C | [#x038E-#x03A1] | [#x03A3-#x03CE] |
-[#x03D0-#x03D6] | #x03DA | #x03DC | #x03DE | #x03E0 | [#x03E2-#x03F3] |
-[#x0401-#x040C] | [#x040E-#x044F] | [#x0451-#x045C] | [#x045E-#x0481] |
-[#x0490-#x04C4] | [#x04C7-#x04C8] | [#x04CB-#x04CC] | [#x04D0-#x04EB] |
-[#x04EE-#x04F5] | [#x04F8-#x04F9] | [#x0531-#x0556] | #x0559 |
-[#x0561-#x0586] | [#x05D0-#x05EA] | [#x05F0-#x05F2] | [#x0621-#x063A] |
-[#x0641-#x064A] | [#x0671-#x06B7] | [#x06BA-#x06BE] | [#x06C0-#x06CE] |
-[#x06D0-#x06D3] | #x06D5 | [#x06E5-#x06E6] | [#x0905-#x0939] | #x093D |
-[#x0958-#x0961] | [#x0985-#x098C] | [#x098F-#x0990] | [#x0993-#x09A8] |
-[#x09AA-#x09B0] | #x09B2 | [#x09B6-#x09B9] | [#x09DC-#x09DD] |
-[#x09DF-#x09E1] | [#x09F0-#x09F1] | [#x0A05-#x0A0A] | [#x0A0F-#x0A10] |
-[#x0A13-#x0A28] | [#x0A2A-#x0A30] | [#x0A32-#x0A33] | [#x0A35-#x0A36] |
-[#x0A38-#x0A39] | [#x0A59-#x0A5C] | #x0A5E | [#x0A72-#x0A74] |
-[#x0A85-#x0A8B] | #x0A8D | [#x0A8F-#x0A91] | [#x0A93-#x0AA8] |
-[#x0AAA-#x0AB0] | [#x0AB2-#x0AB3] | [#x0AB5-#x0AB9] | #x0ABD | #x0AE0 |
-[#x0B05-#x0B0C] | [#x0B0F-#x0B10] | [#x0B13-#x0B28] | [#x0B2A-#x0B30] |
-[#x0B32-#x0B33] | [#x0B36-#x0B39] | #x0B3D | [#x0B5C-#x0B5D] |
-[#x0B5F-#x0B61] | [#x0B85-#x0B8A] | [#x0B8E-#x0B90] | [#x0B92-#x0B95] |
-[#x0B99-#x0B9A] | #x0B9C | [#x0B9E-#x0B9F] | [#x0BA3-#x0BA4] |
-[#x0BA8-#x0BAA] | [#x0BAE-#x0BB5] | [#x0BB7-#x0BB9] | [#x0C05-#x0C0C] |
-[#x0C0E-#x0C10] | [#x0C12-#x0C28] | [#x0C2A-#x0C33] | [#x0C35-#x0C39] |
-[#x0C60-#x0C61] | [#x0C85-#x0C8C] | [#x0C8E-#x0C90] | [#x0C92-#x0CA8] |
-[#x0CAA-#x0CB3] | [#x0CB5-#x0CB9] | #x0CDE | [#x0CE0-#x0CE1] |
-[#x0D05-#x0D0C] | [#x0D0E-#x0D10] | [#x0D12-#x0D28] | [#x0D2A-#x0D39] |
-[#x0D60-#x0D61] | [#x0E01-#x0E2E] | #x0E30 | [#x0E32-#x0E33] |
-[#x0E40-#x0E45] | [#x0E81-#x0E82] | #x0E84 | [#x0E87-#x0E88] | #x0E8A |
-#x0E8D | [#x0E94-#x0E97] | [#x0E99-#x0E9F] | [#x0EA1-#x0EA3] | #x0EA5 |
-#x0EA7 | [#x0EAA-#x0EAB] | [#x0EAD-#x0EAE] | #x0EB0 | [#x0EB2-#x0EB3] |
-#x0EBD | [#x0EC0-#x0EC4] | [#x0F40-#x0F47] | [#x0F49-#x0F69] |
-[#x10A0-#x10C5] | [#x10D0-#x10F6] | #x1100 | [#x1102-#x1103] |
-[#x1105-#x1107] | #x1109 | [#x110B-#x110C] | [#x110E-#x1112] | #x113C |
-#x113E | #x1140 | #x114C | #x114E | #x1150 | [#x1154-#x1155] | #x1159 |
-[#x115F-#x1161] | #x1163 | #x1165 | #x1167 | #x1169 | [#x116D-#x116E] |
-[#x1172-#x1173] | #x1175 | #x119E | #x11A8 | #x11AB | [#x11AE-#x11AF] |
-[#x11B7-#x11B8] | #x11BA | [#x11BC-#x11C2] | #x11EB | #x11F0 | #x11F9 |
-[#x1E00-#x1E9B] | [#x1EA0-#x1EF9] | [#x1F00-#x1F15] | [#x1F18-#x1F1D] |
-[#x1F20-#x1F45] | [#x1F48-#x1F4D] | [#x1F50-#x1F57] | #x1F59 | #x1F5B |
-#x1F5D | [#x1F5F-#x1F7D] | [#x1F80-#x1FB4] | [#x1FB6-#x1FBC] | #x1FBE |
-[#x1FC2-#x1FC4] | [#x1FC6-#x1FCC] | [#x1FD0-#x1FD3] | [#x1FD6-#x1FDB] |
-[#x1FE0-#x1FEC] | [#x1FF2-#x1FF4] | [#x1FF6-#x1FFC] | #x2126 |
-[#x212A-#x212B] | #x212E | [#x2180-#x2182] | [#x3041-#x3094] |
-[#x30A1-#x30FA] | [#x3105-#x312C] | [#xAC00-#xD7A3]"""
-
-ideographic = """[#x4E00-#x9FA5] | #x3007 | [#x3021-#x3029]"""
-
-combiningCharacter = """
-[#x0300-#x0345] | [#x0360-#x0361] | [#x0483-#x0486] | [#x0591-#x05A1] |
-[#x05A3-#x05B9] | [#x05BB-#x05BD] | #x05BF | [#x05C1-#x05C2] | #x05C4 |
-[#x064B-#x0652] | #x0670 | [#x06D6-#x06DC] | [#x06DD-#x06DF] |
-[#x06E0-#x06E4] | [#x06E7-#x06E8] | [#x06EA-#x06ED] | [#x0901-#x0903] |
-#x093C | [#x093E-#x094C] | #x094D | [#x0951-#x0954] | [#x0962-#x0963] |
-[#x0981-#x0983] | #x09BC | #x09BE | #x09BF | [#x09C0-#x09C4] |
-[#x09C7-#x09C8] | [#x09CB-#x09CD] | #x09D7 | [#x09E2-#x09E3] | #x0A02 |
-#x0A3C | #x0A3E | #x0A3F | [#x0A40-#x0A42] | [#x0A47-#x0A48] |
-[#x0A4B-#x0A4D] | [#x0A70-#x0A71] | [#x0A81-#x0A83] | #x0ABC |
-[#x0ABE-#x0AC5] | [#x0AC7-#x0AC9] | [#x0ACB-#x0ACD] | [#x0B01-#x0B03] |
-#x0B3C | [#x0B3E-#x0B43] | [#x0B47-#x0B48] | [#x0B4B-#x0B4D] |
-[#x0B56-#x0B57] | [#x0B82-#x0B83] | [#x0BBE-#x0BC2] | [#x0BC6-#x0BC8] |
-[#x0BCA-#x0BCD] | #x0BD7 | [#x0C01-#x0C03] | [#x0C3E-#x0C44] |
-[#x0C46-#x0C48] | [#x0C4A-#x0C4D] | [#x0C55-#x0C56] | [#x0C82-#x0C83] |
-[#x0CBE-#x0CC4] | [#x0CC6-#x0CC8] | [#x0CCA-#x0CCD] | [#x0CD5-#x0CD6] |
-[#x0D02-#x0D03] | [#x0D3E-#x0D43] | [#x0D46-#x0D48] | [#x0D4A-#x0D4D] |
-#x0D57 | #x0E31 | [#x0E34-#x0E3A] | [#x0E47-#x0E4E] | #x0EB1 |
-[#x0EB4-#x0EB9] | [#x0EBB-#x0EBC] | [#x0EC8-#x0ECD] | [#x0F18-#x0F19] |
-#x0F35 | #x0F37 | #x0F39 | #x0F3E | #x0F3F | [#x0F71-#x0F84] |
-[#x0F86-#x0F8B] | [#x0F90-#x0F95] | #x0F97 | [#x0F99-#x0FAD] |
-[#x0FB1-#x0FB7] | #x0FB9 | [#x20D0-#x20DC] | #x20E1 | [#x302A-#x302F] |
-#x3099 | #x309A"""
-
-digit = """
-[#x0030-#x0039] | [#x0660-#x0669] | [#x06F0-#x06F9] | [#x0966-#x096F] |
-[#x09E6-#x09EF] | [#x0A66-#x0A6F] | [#x0AE6-#x0AEF] | [#x0B66-#x0B6F] |
-[#x0BE7-#x0BEF] | [#x0C66-#x0C6F] | [#x0CE6-#x0CEF] | [#x0D66-#x0D6F] |
-[#x0E50-#x0E59] | [#x0ED0-#x0ED9] | [#x0F20-#x0F29]"""
-
-extender = """
-#x00B7 | #x02D0 | #x02D1 | #x0387 | #x0640 | #x0E46 | #x0EC6 | #x3005 |
-#[#x3031-#x3035] | [#x309D-#x309E] | [#x30FC-#x30FE]"""
-
-letter = " | ".join([baseChar, ideographic])
-
-# Without the
-name = " | ".join([letter, digit, ".", "-", "_", combiningCharacter,
-                   extender])
-nameFirst = " | ".join([letter, "_"])
-
-reChar = re.compile(r"#x([\d|A-F]{4,4})")
-reCharRange = re.compile(r"\[#x([\d|A-F]{4,4})-#x([\d|A-F]{4,4})\]")
-
-
-def charStringToList(chars):
-    charRanges = [item.strip() for item in chars.split(" | ")]
-    rv = []
-    for item in charRanges:
-        foundMatch = False
-        for regexp in (reChar, reCharRange):
-            match = regexp.match(item)
-            if match is not None:
-                rv.append([hexToInt(item) for item in match.groups()])
-                if len(rv[-1]) == 1:
-                    rv[-1] = rv[-1] * 2
-                foundMatch = True
-                break
-        if not foundMatch:
-            assert len(item) == 1
-
-            rv.append([ord(item)] * 2)
-    rv = normaliseCharList(rv)
-    return rv
-
-
-def normaliseCharList(charList):
-    charList = sorted(charList)
-    for item in charList:
-        assert item[1] >= item[0]
-    rv = []
-    i = 0
-    while i < len(charList):
-        j = 1
-        rv.append(charList[i])
-        while i + j < len(charList) and charList[i + j][0] <= rv[-1][1] + 1:
-            rv[-1][1] = charList[i + j][1]
-            j += 1
-        i += j
-    return rv
-
-# We don't really support characters above the BMP :(
-max_unicode = int("FFFF", 16)
-
-
-def missingRanges(charList):
-    rv = []
-    if charList[0] != 0:
-        rv.append([0, charList[0][0] - 1])
-    for i, item in enumerate(charList[:-1]):
-        rv.append([item[1] + 1, charList[i + 1][0] - 1])
-    if charList[-1][1] != max_unicode:
-        rv.append([charList[-1][1] + 1, max_unicode])
-    return rv
-
-
-def listToRegexpStr(charList):
-    rv = []
-    for item in charList:
-        if item[0] == item[1]:
-            rv.append(escapeRegexp(chr(item[0])))
-        else:
-            rv.append(escapeRegexp(chr(item[0])) + "-" +
-                      escapeRegexp(chr(item[1])))
-    return "[%s]" % "".join(rv)
-
-
-def hexToInt(hex_str):
-    return int(hex_str, 16)
-
-
-def escapeRegexp(string):
-    specialCharacters = (".", "^", "$", "*", "+", "?", "{", "}",
-                         "[", "]", "|", "(", ")", "-")
-    for char in specialCharacters:
-        string = string.replace(char, "\\" + char)
-
-    return string
-
-# output from the above
-nonXmlNameBMPRegexp = re.compile('[\x00-,/:-@\\[-\\^`\\{-\xb6\xb8-\xbf\xd7\xf7\u0132-\u0133\u013f-\u0140\u0149\u017f\u01c4-\u01cc\u01f1-\u01f3\u01f6-\u01f9\u0218-\u024f\u02a9-\u02ba\u02c2-\u02cf\u02d2-\u02ff\u0346-\u035f\u0362-\u0385\u038b\u038d\u03a2\u03cf\u03d7-\u03d9\u03db\u03dd\u03df\u03e1\u03f4-\u0400\u040d\u0450\u045d\u0482\u0487-\u048f\u04c5-\u04c6\u04c9-\u04ca\u04cd-\u04cf\u04ec-\u04ed\u04f6-\u04f7\u04fa-\u0530\u0557-\u0558\u055a-\u0560\u0587-\u0590\u05a2\u05ba\u05be\u05c0\u05c3\u05c5-\u05cf\u05eb-\u05ef\u05f3-\u0620\u063b-\u063f\u0653-\u065f\u066a-\u066f\u06b8-\u06b9\u06bf\u06cf\u06d4\u06e9\u06ee-\u06ef\u06fa-\u0900\u0904\u093a-\u093b\u094e-\u0950\u0955-\u0957\u0964-\u0965\u0970-\u0980\u0984\u098d-\u098e\u0991-\u0992\u09a9\u09b1\u09b3-\u09b5\u09ba-\u09bb\u09bd\u09c5-\u09c6\u09c9-\u09ca\u09ce-\u09d6\u09d8-\u09db\u09de\u09e4-\u09e5\u09f2-\u0a01\u0a03-\u0a04\u0a0b-\u0a0e\u0a11-\u0a12\u0a29\u0a31\u0a34\u0a37\u0a3a-\u0a3b\u0a3d\u0a43-\u0a46\u0a49-\u0a4a\u0a4e-\u0a58\u0a5d\u0a5f-\u0a65\u0a75-\u0a80\u0a84\u0a8c\u0a8e\u0a92\u0aa9\u0ab1\u0ab4\u0aba-\u0abb\u0ac6\u0aca\u0ace-\u0adf\u0ae1-\u0ae5\u0af0-\u0b00\u0b04\u0b0d-\u0b0e\u0b11-\u0b12\u0b29\u0b31\u0b34-\u0b35\u0b3a-\u0b3b\u0b44-\u0b46\u0b49-\u0b4a\u0b4e-\u0b55\u0b58-\u0b5b\u0b5e\u0b62-\u0b65\u0b70-\u0b81\u0b84\u0b8b-\u0b8d\u0b91\u0b96-\u0b98\u0b9b\u0b9d\u0ba0-\u0ba2\u0ba5-\u0ba7\u0bab-\u0bad\u0bb6\u0bba-\u0bbd\u0bc3-\u0bc5\u0bc9\u0bce-\u0bd6\u0bd8-\u0be6\u0bf0-\u0c00\u0c04\u0c0d\u0c11\u0c29\u0c34\u0c3a-\u0c3d\u0c45\u0c49\u0c4e-\u0c54\u0c57-\u0c5f\u0c62-\u0c65\u0c70-\u0c81\u0c84\u0c8d\u0c91\u0ca9\u0cb4\u0cba-\u0cbd\u0cc5\u0cc9\u0cce-\u0cd4\u0cd7-\u0cdd\u0cdf\u0ce2-\u0ce5\u0cf0-\u0d01\u0d04\u0d0d\u0d11\u0d29\u0d3a-\u0d3d\u0d44-\u0d45\u0d49\u0d4e-\u0d56\u0d58-\u0d5f\u0d62-\u0d65\u0d70-\u0e00\u0e2f\u0e3b-\u0e3f\u0e4f\u0e5a-\u0e80\u0e83\u0e85-\u0e86\u0e89\u0e8b-\u0e8c\u0e8e-\u0e93\u0e98\u0ea0\u0ea4\u0ea6\u0ea8-\u0ea9\u0eac\u0eaf\u0eba\u0ebe-\u0ebf\u0ec5\u0ec7\u0ece-\u0ecf\u0eda-\u0f17\u0f1a-\u0f1f\u0f2a-\u0f34\u0f36\u0f38\u0f3a-\u0f3d\u0f48\u0f6a-\u0f70\u0f85\u0f8c-\u0f8f\u0f96\u0f98\u0fae-\u0fb0\u0fb8\u0fba-\u109f\u10c6-\u10cf\u10f7-\u10ff\u1101\u1104\u1108\u110a\u110d\u1113-\u113b\u113d\u113f\u1141-\u114b\u114d\u114f\u1151-\u1153\u1156-\u1158\u115a-\u115e\u1162\u1164\u1166\u1168\u116a-\u116c\u116f-\u1171\u1174\u1176-\u119d\u119f-\u11a7\u11a9-\u11aa\u11ac-\u11ad\u11b0-\u11b6\u11b9\u11bb\u11c3-\u11ea\u11ec-\u11ef\u11f1-\u11f8\u11fa-\u1dff\u1e9c-\u1e9f\u1efa-\u1eff\u1f16-\u1f17\u1f1e-\u1f1f\u1f46-\u1f47\u1f4e-\u1f4f\u1f58\u1f5a\u1f5c\u1f5e\u1f7e-\u1f7f\u1fb5\u1fbd\u1fbf-\u1fc1\u1fc5\u1fcd-\u1fcf\u1fd4-\u1fd5\u1fdc-\u1fdf\u1fed-\u1ff1\u1ff5\u1ffd-\u20cf\u20dd-\u20e0\u20e2-\u2125\u2127-\u2129\u212c-\u212d\u212f-\u217f\u2183-\u3004\u3006\u3008-\u3020\u3030\u3036-\u3040\u3095-\u3098\u309b-\u309c\u309f-\u30a0\u30fb\u30ff-\u3104\u312d-\u4dff\u9fa6-\uabff\ud7a4-\uffff]')  # noqa
-
-nonXmlNameFirstBMPRegexp = re.compile('[\x00-@\\[-\\^`\\{-\xbf\xd7\xf7\u0132-\u0133\u013f-\u0140\u0149\u017f\u01c4-\u01cc\u01f1-\u01f3\u01f6-\u01f9\u0218-\u024f\u02a9-\u02ba\u02c2-\u0385\u0387\u038b\u038d\u03a2\u03cf\u03d7-\u03d9\u03db\u03dd\u03df\u03e1\u03f4-\u0400\u040d\u0450\u045d\u0482-\u048f\u04c5-\u04c6\u04c9-\u04ca\u04cd-\u04cf\u04ec-\u04ed\u04f6-\u04f7\u04fa-\u0530\u0557-\u0558\u055a-\u0560\u0587-\u05cf\u05eb-\u05ef\u05f3-\u0620\u063b-\u0640\u064b-\u0670\u06b8-\u06b9\u06bf\u06cf\u06d4\u06d6-\u06e4\u06e7-\u0904\u093a-\u093c\u093e-\u0957\u0962-\u0984\u098d-\u098e\u0991-\u0992\u09a9\u09b1\u09b3-\u09b5\u09ba-\u09db\u09de\u09e2-\u09ef\u09f2-\u0a04\u0a0b-\u0a0e\u0a11-\u0a12\u0a29\u0a31\u0a34\u0a37\u0a3a-\u0a58\u0a5d\u0a5f-\u0a71\u0a75-\u0a84\u0a8c\u0a8e\u0a92\u0aa9\u0ab1\u0ab4\u0aba-\u0abc\u0abe-\u0adf\u0ae1-\u0b04\u0b0d-\u0b0e\u0b11-\u0b12\u0b29\u0b31\u0b34-\u0b35\u0b3a-\u0b3c\u0b3e-\u0b5b\u0b5e\u0b62-\u0b84\u0b8b-\u0b8d\u0b91\u0b96-\u0b98\u0b9b\u0b9d\u0ba0-\u0ba2\u0ba5-\u0ba7\u0bab-\u0bad\u0bb6\u0bba-\u0c04\u0c0d\u0c11\u0c29\u0c34\u0c3a-\u0c5f\u0c62-\u0c84\u0c8d\u0c91\u0ca9\u0cb4\u0cba-\u0cdd\u0cdf\u0ce2-\u0d04\u0d0d\u0d11\u0d29\u0d3a-\u0d5f\u0d62-\u0e00\u0e2f\u0e31\u0e34-\u0e3f\u0e46-\u0e80\u0e83\u0e85-\u0e86\u0e89\u0e8b-\u0e8c\u0e8e-\u0e93\u0e98\u0ea0\u0ea4\u0ea6\u0ea8-\u0ea9\u0eac\u0eaf\u0eb1\u0eb4-\u0ebc\u0ebe-\u0ebf\u0ec5-\u0f3f\u0f48\u0f6a-\u109f\u10c6-\u10cf\u10f7-\u10ff\u1101\u1104\u1108\u110a\u110d\u1113-\u113b\u113d\u113f\u1141-\u114b\u114d\u114f\u1151-\u1153\u1156-\u1158\u115a-\u115e\u1162\u1164\u1166\u1168\u116a-\u116c\u116f-\u1171\u1174\u1176-\u119d\u119f-\u11a7\u11a9-\u11aa\u11ac-\u11ad\u11b0-\u11b6\u11b9\u11bb\u11c3-\u11ea\u11ec-\u11ef\u11f1-\u11f8\u11fa-\u1dff\u1e9c-\u1e9f\u1efa-\u1eff\u1f16-\u1f17\u1f1e-\u1f1f\u1f46-\u1f47\u1f4e-\u1f4f\u1f58\u1f5a\u1f5c\u1f5e\u1f7e-\u1f7f\u1fb5\u1fbd\u1fbf-\u1fc1\u1fc5\u1fcd-\u1fcf\u1fd4-\u1fd5\u1fdc-\u1fdf\u1fed-\u1ff1\u1ff5\u1ffd-\u2125\u2127-\u2129\u212c-\u212d\u212f-\u217f\u2183-\u3006\u3008-\u3020\u302a-\u3040\u3095-\u30a0\u30fb-\u3104\u312d-\u4dff\u9fa6-\uabff\ud7a4-\uffff]')  # noqa
-
-# Simpler things
-nonPubidCharRegexp = re.compile("[^\x20\x0D\x0Aa-zA-Z0-9\\-'()+,./:=?;!*#@$_%]")
-
-
-class InfosetFilter(object):
-    replacementRegexp = re.compile(r"U[\dA-F]{5,5}")
-
-    def __init__(self,
-                 dropXmlnsLocalName=False,
-                 dropXmlnsAttrNs=False,
-                 preventDoubleDashComments=False,
-                 preventDashAtCommentEnd=False,
-                 replaceFormFeedCharacters=True,
-                 preventSingleQuotePubid=False):
-
-        self.dropXmlnsLocalName = dropXmlnsLocalName
-        self.dropXmlnsAttrNs = dropXmlnsAttrNs
-
-        self.preventDoubleDashComments = preventDoubleDashComments
-        self.preventDashAtCommentEnd = preventDashAtCommentEnd
-
-        self.replaceFormFeedCharacters = replaceFormFeedCharacters
-
-        self.preventSingleQuotePubid = preventSingleQuotePubid
-
-        self.replaceCache = {}
-
-    def coerceAttribute(self, name, namespace=None):
-        if self.dropXmlnsLocalName and name.startswith("xmlns:"):
-            warnings.warn("Attributes cannot begin with xmlns", DataLossWarning)
-            return None
-        elif (self.dropXmlnsAttrNs and
-              namespace == "http://www.w3.org/2000/xmlns/"):
-            warnings.warn("Attributes cannot be in the xml namespace", DataLossWarning)
-            return None
-        else:
-            return self.toXmlName(name)
-
-    def coerceElement(self, name):
-        return self.toXmlName(name)
-
-    def coerceComment(self, data):
-        if self.preventDoubleDashComments:
-            while "--" in data:
-                warnings.warn("Comments cannot contain adjacent dashes", DataLossWarning)
-                data = data.replace("--", "- -")
-            if data.endswith("-"):
-                warnings.warn("Comments cannot end in a dash", DataLossWarning)
-                data += " "
-        return data
-
-    def coerceCharacters(self, data):
-        if self.replaceFormFeedCharacters:
-            for _ in range(data.count("\x0C")):
-                warnings.warn("Text cannot contain U+000C", DataLossWarning)
-            data = data.replace("\x0C", " ")
-        # Other non-xml characters
-        return data
-
-    def coercePubid(self, data):
-        dataOutput = data
-        for char in nonPubidCharRegexp.findall(data):
-            warnings.warn("Coercing non-XML pubid", DataLossWarning)
-            replacement = self.getReplacementCharacter(char)
-            dataOutput = dataOutput.replace(char, replacement)
-        if self.preventSingleQuotePubid and dataOutput.find("'") >= 0:
-            warnings.warn("Pubid cannot contain single quote", DataLossWarning)
-            dataOutput = dataOutput.replace("'", self.getReplacementCharacter("'"))
-        return dataOutput
-
-    def toXmlName(self, name):
-        nameFirst = name[0]
-        nameRest = name[1:]
-        m = nonXmlNameFirstBMPRegexp.match(nameFirst)
-        if m:
-            warnings.warn("Coercing non-XML name", DataLossWarning)
-            nameFirstOutput = self.getReplacementCharacter(nameFirst)
-        else:
-            nameFirstOutput = nameFirst
-
-        nameRestOutput = nameRest
-        replaceChars = set(nonXmlNameBMPRegexp.findall(nameRest))
-        for char in replaceChars:
-            warnings.warn("Coercing non-XML name", DataLossWarning)
-            replacement = self.getReplacementCharacter(char)
-            nameRestOutput = nameRestOutput.replace(char, replacement)
-        return nameFirstOutput + nameRestOutput
-
-    def getReplacementCharacter(self, char):
-        if char in self.replaceCache:
-            replacement = self.replaceCache[char]
-        else:
-            replacement = self.escapeChar(char)
-        return replacement
-
-    def fromXmlName(self, name):
-        for item in set(self.replacementRegexp.findall(name)):
-            name = name.replace(item, self.unescapeChar(item))
-        return name
-
-    def escapeChar(self, char):
-        replacement = "U%05X" % ord(char)
-        self.replaceCache[char] = replacement
-        return replacement
-
-    def unescapeChar(self, charcode):
-        return chr(int(charcode[1:], 16))
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/_inputstream.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/_inputstream.py
deleted file mode 100644
index a65e55f..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/_inputstream.py
+++ /dev/null
@@ -1,923 +0,0 @@
-from __future__ import absolute_import, division, unicode_literals
-
-from pip._vendor.six import text_type, binary_type
-from pip._vendor.six.moves import http_client, urllib
-
-import codecs
-import re
-
-from pip._vendor import webencodings
-
-from .constants import EOF, spaceCharacters, asciiLetters, asciiUppercase
-from .constants import _ReparseException
-from . import _utils
-
-from io import StringIO
-
-try:
-    from io import BytesIO
-except ImportError:
-    BytesIO = StringIO
-
-# Non-unicode versions of constants for use in the pre-parser
-spaceCharactersBytes = frozenset([item.encode("ascii") for item in spaceCharacters])
-asciiLettersBytes = frozenset([item.encode("ascii") for item in asciiLetters])
-asciiUppercaseBytes = frozenset([item.encode("ascii") for item in asciiUppercase])
-spacesAngleBrackets = spaceCharactersBytes | frozenset([b">", b"<"])
-
-
-invalid_unicode_no_surrogate = "[\u0001-\u0008\u000B\u000E-\u001F\u007F-\u009F\uFDD0-\uFDEF\uFFFE\uFFFF\U0001FFFE\U0001FFFF\U0002FFFE\U0002FFFF\U0003FFFE\U0003FFFF\U0004FFFE\U0004FFFF\U0005FFFE\U0005FFFF\U0006FFFE\U0006FFFF\U0007FFFE\U0007FFFF\U0008FFFE\U0008FFFF\U0009FFFE\U0009FFFF\U000AFFFE\U000AFFFF\U000BFFFE\U000BFFFF\U000CFFFE\U000CFFFF\U000DFFFE\U000DFFFF\U000EFFFE\U000EFFFF\U000FFFFE\U000FFFFF\U0010FFFE\U0010FFFF]"  # noqa
-
-if _utils.supports_lone_surrogates:
-    # Use one extra step of indirection and create surrogates with
-    # eval. Not using this indirection would introduce an illegal
-    # unicode literal on platforms not supporting such lone
-    # surrogates.
-    assert invalid_unicode_no_surrogate[-1] == "]" and invalid_unicode_no_surrogate.count("]") == 1
-    invalid_unicode_re = re.compile(invalid_unicode_no_surrogate[:-1] +
-                                    eval('"\\uD800-\\uDFFF"') +  # pylint:disable=eval-used
-                                    "]")
-else:
-    invalid_unicode_re = re.compile(invalid_unicode_no_surrogate)
-
-non_bmp_invalid_codepoints = set([0x1FFFE, 0x1FFFF, 0x2FFFE, 0x2FFFF, 0x3FFFE,
-                                  0x3FFFF, 0x4FFFE, 0x4FFFF, 0x5FFFE, 0x5FFFF,
-                                  0x6FFFE, 0x6FFFF, 0x7FFFE, 0x7FFFF, 0x8FFFE,
-                                  0x8FFFF, 0x9FFFE, 0x9FFFF, 0xAFFFE, 0xAFFFF,
-                                  0xBFFFE, 0xBFFFF, 0xCFFFE, 0xCFFFF, 0xDFFFE,
-                                  0xDFFFF, 0xEFFFE, 0xEFFFF, 0xFFFFE, 0xFFFFF,
-                                  0x10FFFE, 0x10FFFF])
-
-ascii_punctuation_re = re.compile("[\u0009-\u000D\u0020-\u002F\u003A-\u0040\u005C\u005B-\u0060\u007B-\u007E]")
-
-# Cache for charsUntil()
-charsUntilRegEx = {}
-
-
-class BufferedStream(object):
-    """Buffering for streams that do not have buffering of their own
-
-    The buffer is implemented as a list of chunks on the assumption that
-    joining many strings will be slow since it is O(n**2)
-    """
-
-    def __init__(self, stream):
-        self.stream = stream
-        self.buffer = []
-        self.position = [-1, 0]  # chunk number, offset
-
-    def tell(self):
-        pos = 0
-        for chunk in self.buffer[:self.position[0]]:
-            pos += len(chunk)
-        pos += self.position[1]
-        return pos
-
-    def seek(self, pos):
-        assert pos <= self._bufferedBytes()
-        offset = pos
-        i = 0
-        while len(self.buffer[i]) < offset:
-            offset -= len(self.buffer[i])
-            i += 1
-        self.position = [i, offset]
-
-    def read(self, bytes):
-        if not self.buffer:
-            return self._readStream(bytes)
-        elif (self.position[0] == len(self.buffer) and
-              self.position[1] == len(self.buffer[-1])):
-            return self._readStream(bytes)
-        else:
-            return self._readFromBuffer(bytes)
-
-    def _bufferedBytes(self):
-        return sum([len(item) for item in self.buffer])
-
-    def _readStream(self, bytes):
-        data = self.stream.read(bytes)
-        self.buffer.append(data)
-        self.position[0] += 1
-        self.position[1] = len(data)
-        return data
-
-    def _readFromBuffer(self, bytes):
-        remainingBytes = bytes
-        rv = []
-        bufferIndex = self.position[0]
-        bufferOffset = self.position[1]
-        while bufferIndex < len(self.buffer) and remainingBytes != 0:
-            assert remainingBytes > 0
-            bufferedData = self.buffer[bufferIndex]
-
-            if remainingBytes <= len(bufferedData) - bufferOffset:
-                bytesToRead = remainingBytes
-                self.position = [bufferIndex, bufferOffset + bytesToRead]
-            else:
-                bytesToRead = len(bufferedData) - bufferOffset
-                self.position = [bufferIndex, len(bufferedData)]
-                bufferIndex += 1
-            rv.append(bufferedData[bufferOffset:bufferOffset + bytesToRead])
-            remainingBytes -= bytesToRead
-
-            bufferOffset = 0
-
-        if remainingBytes:
-            rv.append(self._readStream(remainingBytes))
-
-        return b"".join(rv)
-
-
-def HTMLInputStream(source, **kwargs):
-    # Work around Python bug #20007: read(0) closes the connection.
-    # http://bugs.python.org/issue20007
-    if (isinstance(source, http_client.HTTPResponse) or
-        # Also check for addinfourl wrapping HTTPResponse
-        (isinstance(source, urllib.response.addbase) and
-         isinstance(source.fp, http_client.HTTPResponse))):
-        isUnicode = False
-    elif hasattr(source, "read"):
-        isUnicode = isinstance(source.read(0), text_type)
-    else:
-        isUnicode = isinstance(source, text_type)
-
-    if isUnicode:
-        encodings = [x for x in kwargs if x.endswith("_encoding")]
-        if encodings:
-            raise TypeError("Cannot set an encoding with a unicode input, set %r" % encodings)
-
-        return HTMLUnicodeInputStream(source, **kwargs)
-    else:
-        return HTMLBinaryInputStream(source, **kwargs)
-
-
-class HTMLUnicodeInputStream(object):
-    """Provides a unicode stream of characters to the HTMLTokenizer.
-
-    This class takes care of character encoding and removing or replacing
-    incorrect byte-sequences and also provides column and line tracking.
-
-    """
-
-    _defaultChunkSize = 10240
-
-    def __init__(self, source):
-        """Initialises the HTMLInputStream.
-
-        HTMLInputStream(source, [encoding]) -> Normalized stream from source
-        for use by html5lib.
-
-        source can be either a file-object, local filename or a string.
-
-        The optional encoding parameter must be a string that indicates
-        the encoding.  If specified, that encoding will be used,
-        regardless of any BOM or later declaration (such as in a meta
-        element)
-
-        """
-
-        if not _utils.supports_lone_surrogates:
-            # Such platforms will have already checked for such
-            # surrogate errors, so no need to do this checking.
-            self.reportCharacterErrors = None
-        elif len("\U0010FFFF") == 1:
-            self.reportCharacterErrors = self.characterErrorsUCS4
-        else:
-            self.reportCharacterErrors = self.characterErrorsUCS2
-
-        # List of where new lines occur
-        self.newLines = [0]
-
-        self.charEncoding = (lookupEncoding("utf-8"), "certain")
-        self.dataStream = self.openStream(source)
-
-        self.reset()
-
-    def reset(self):
-        self.chunk = ""
-        self.chunkSize = 0
-        self.chunkOffset = 0
-        self.errors = []
-
-        # number of (complete) lines in previous chunks
-        self.prevNumLines = 0
-        # number of columns in the last line of the previous chunk
-        self.prevNumCols = 0
-
-        # Deal with CR LF and surrogates split over chunk boundaries
-        self._bufferedCharacter = None
-
-    def openStream(self, source):
-        """Produces a file object from source.
-
-        source can be either a file object, local filename or a string.
-
-        """
-        # Already a file object
-        if hasattr(source, 'read'):
-            stream = source
-        else:
-            stream = StringIO(source)
-
-        return stream
-
-    def _position(self, offset):
-        chunk = self.chunk
-        nLines = chunk.count('\n', 0, offset)
-        positionLine = self.prevNumLines + nLines
-        lastLinePos = chunk.rfind('\n', 0, offset)
-        if lastLinePos == -1:
-            positionColumn = self.prevNumCols + offset
-        else:
-            positionColumn = offset - (lastLinePos + 1)
-        return (positionLine, positionColumn)
-
-    def position(self):
-        """Returns (line, col) of the current position in the stream."""
-        line, col = self._position(self.chunkOffset)
-        return (line + 1, col)
-
-    def char(self):
-        """ Read one character from the stream or queue if available. Return
-            EOF when EOF is reached.
-        """
-        # Read a new chunk from the input stream if necessary
-        if self.chunkOffset >= self.chunkSize:
-            if not self.readChunk():
-                return EOF
-
-        chunkOffset = self.chunkOffset
-        char = self.chunk[chunkOffset]
-        self.chunkOffset = chunkOffset + 1
-
-        return char
-
-    def readChunk(self, chunkSize=None):
-        if chunkSize is None:
-            chunkSize = self._defaultChunkSize
-
-        self.prevNumLines, self.prevNumCols = self._position(self.chunkSize)
-
-        self.chunk = ""
-        self.chunkSize = 0
-        self.chunkOffset = 0
-
-        data = self.dataStream.read(chunkSize)
-
-        # Deal with CR LF and surrogates broken across chunks
-        if self._bufferedCharacter:
-            data = self._bufferedCharacter + data
-            self._bufferedCharacter = None
-        elif not data:
-            # We have no more data, bye-bye stream
-            return False
-
-        if len(data) > 1:
-            lastv = ord(data[-1])
-            if lastv == 0x0D or 0xD800 <= lastv <= 0xDBFF:
-                self._bufferedCharacter = data[-1]
-                data = data[:-1]
-
-        if self.reportCharacterErrors:
-            self.reportCharacterErrors(data)
-
-        # Replace invalid characters
-        data = data.replace("\r\n", "\n")
-        data = data.replace("\r", "\n")
-
-        self.chunk = data
-        self.chunkSize = len(data)
-
-        return True
-
-    def characterErrorsUCS4(self, data):
-        for _ in range(len(invalid_unicode_re.findall(data))):
-            self.errors.append("invalid-codepoint")
-
-    def characterErrorsUCS2(self, data):
-        # Someone picked the wrong compile option
-        # You lose
-        skip = False
-        for match in invalid_unicode_re.finditer(data):
-            if skip:
-                continue
-            codepoint = ord(match.group())
-            pos = match.start()
-            # Pretty sure there should be endianness issues here
-            if _utils.isSurrogatePair(data[pos:pos + 2]):
-                # We have a surrogate pair!
-                char_val = _utils.surrogatePairToCodepoint(data[pos:pos + 2])
-                if char_val in non_bmp_invalid_codepoints:
-                    self.errors.append("invalid-codepoint")
-                skip = True
-            elif (codepoint >= 0xD800 and codepoint <= 0xDFFF and
-                  pos == len(data) - 1):
-                self.errors.append("invalid-codepoint")
-            else:
-                skip = False
-                self.errors.append("invalid-codepoint")
-
-    def charsUntil(self, characters, opposite=False):
-        """ Returns a string of characters from the stream up to but not
-        including any character in 'characters' or EOF. 'characters' must be
-        a container that supports the 'in' method and iteration over its
-        characters.
-        """
-
-        # Use a cache of regexps to find the required characters
-        try:
-            chars = charsUntilRegEx[(characters, opposite)]
-        except KeyError:
-            if __debug__:
-                for c in characters:
-                    assert(ord(c) < 128)
-            regex = "".join(["\\x%02x" % ord(c) for c in characters])
-            if not opposite:
-                regex = "^%s" % regex
-            chars = charsUntilRegEx[(characters, opposite)] = re.compile("[%s]+" % regex)
-
-        rv = []
-
-        while True:
-            # Find the longest matching prefix
-            m = chars.match(self.chunk, self.chunkOffset)
-            if m is None:
-                # If nothing matched, and it wasn't because we ran out of chunk,
-                # then stop
-                if self.chunkOffset != self.chunkSize:
-                    break
-            else:
-                end = m.end()
-                # If not the whole chunk matched, return everything
-                # up to the part that didn't match
-                if end != self.chunkSize:
-                    rv.append(self.chunk[self.chunkOffset:end])
-                    self.chunkOffset = end
-                    break
-            # If the whole remainder of the chunk matched,
-            # use it all and read the next chunk
-            rv.append(self.chunk[self.chunkOffset:])
-            if not self.readChunk():
-                # Reached EOF
-                break
-
-        r = "".join(rv)
-        return r
-
-    def unget(self, char):
-        # Only one character is allowed to be ungotten at once - it must
-        # be consumed again before any further call to unget
-        if char is not None:
-            if self.chunkOffset == 0:
-                # unget is called quite rarely, so it's a good idea to do
-                # more work here if it saves a bit of work in the frequently
-                # called char and charsUntil.
-                # So, just prepend the ungotten character onto the current
-                # chunk:
-                self.chunk = char + self.chunk
-                self.chunkSize += 1
-            else:
-                self.chunkOffset -= 1
-                assert self.chunk[self.chunkOffset] == char
-
-
-class HTMLBinaryInputStream(HTMLUnicodeInputStream):
-    """Provides a unicode stream of characters to the HTMLTokenizer.
-
-    This class takes care of character encoding and removing or replacing
-    incorrect byte-sequences and also provides column and line tracking.
-
-    """
-
-    def __init__(self, source, override_encoding=None, transport_encoding=None,
-                 same_origin_parent_encoding=None, likely_encoding=None,
-                 default_encoding="windows-1252", useChardet=True):
-        """Initialises the HTMLInputStream.
-
-        HTMLInputStream(source, [encoding]) -> Normalized stream from source
-        for use by html5lib.
-
-        source can be either a file-object, local filename or a string.
-
-        The optional encoding parameter must be a string that indicates
-        the encoding.  If specified, that encoding will be used,
-        regardless of any BOM or later declaration (such as in a meta
-        element)
-
-        """
-        # Raw Stream - for unicode objects this will encode to utf-8 and set
-        #              self.charEncoding as appropriate
-        self.rawStream = self.openStream(source)
-
-        HTMLUnicodeInputStream.__init__(self, self.rawStream)
-
-        # Encoding Information
-        # Number of bytes to use when looking for a meta element with
-        # encoding information
-        self.numBytesMeta = 1024
-        # Number of bytes to use when using detecting encoding using chardet
-        self.numBytesChardet = 100
-        # Things from args
-        self.override_encoding = override_encoding
-        self.transport_encoding = transport_encoding
-        self.same_origin_parent_encoding = same_origin_parent_encoding
-        self.likely_encoding = likely_encoding
-        self.default_encoding = default_encoding
-
-        # Determine encoding
-        self.charEncoding = self.determineEncoding(useChardet)
-        assert self.charEncoding[0] is not None
-
-        # Call superclass
-        self.reset()
-
-    def reset(self):
-        self.dataStream = self.charEncoding[0].codec_info.streamreader(self.rawStream, 'replace')
-        HTMLUnicodeInputStream.reset(self)
-
-    def openStream(self, source):
-        """Produces a file object from source.
-
-        source can be either a file object, local filename or a string.
-
-        """
-        # Already a file object
-        if hasattr(source, 'read'):
-            stream = source
-        else:
-            stream = BytesIO(source)
-
-        try:
-            stream.seek(stream.tell())
-        except:  # pylint:disable=bare-except
-            stream = BufferedStream(stream)
-
-        return stream
-
-    def determineEncoding(self, chardet=True):
-        # BOMs take precedence over everything
-        # This will also read past the BOM if present
-        charEncoding = self.detectBOM(), "certain"
-        if charEncoding[0] is not None:
-            return charEncoding
-
-        # If we've been overriden, we've been overriden
-        charEncoding = lookupEncoding(self.override_encoding), "certain"
-        if charEncoding[0] is not None:
-            return charEncoding
-
-        # Now check the transport layer
-        charEncoding = lookupEncoding(self.transport_encoding), "certain"
-        if charEncoding[0] is not None:
-            return charEncoding
-
-        # Look for meta elements with encoding information
-        charEncoding = self.detectEncodingMeta(), "tentative"
-        if charEncoding[0] is not None:
-            return charEncoding
-
-        # Parent document encoding
-        charEncoding = lookupEncoding(self.same_origin_parent_encoding), "tentative"
-        if charEncoding[0] is not None and not charEncoding[0].name.startswith("utf-16"):
-            return charEncoding
-
-        # "likely" encoding
-        charEncoding = lookupEncoding(self.likely_encoding), "tentative"
-        if charEncoding[0] is not None:
-            return charEncoding
-
-        # Guess with chardet, if available
-        if chardet:
-            try:
-                from pip._vendor.chardet.universaldetector import UniversalDetector
-            except ImportError:
-                pass
-            else:
-                buffers = []
-                detector = UniversalDetector()
-                while not detector.done:
-                    buffer = self.rawStream.read(self.numBytesChardet)
-                    assert isinstance(buffer, bytes)
-                    if not buffer:
-                        break
-                    buffers.append(buffer)
-                    detector.feed(buffer)
-                detector.close()
-                encoding = lookupEncoding(detector.result['encoding'])
-                self.rawStream.seek(0)
-                if encoding is not None:
-                    return encoding, "tentative"
-
-        # Try the default encoding
-        charEncoding = lookupEncoding(self.default_encoding), "tentative"
-        if charEncoding[0] is not None:
-            return charEncoding
-
-        # Fallback to html5lib's default if even that hasn't worked
-        return lookupEncoding("windows-1252"), "tentative"
-
-    def changeEncoding(self, newEncoding):
-        assert self.charEncoding[1] != "certain"
-        newEncoding = lookupEncoding(newEncoding)
-        if newEncoding is None:
-            return
-        if newEncoding.name in ("utf-16be", "utf-16le"):
-            newEncoding = lookupEncoding("utf-8")
-            assert newEncoding is not None
-        elif newEncoding == self.charEncoding[0]:
-            self.charEncoding = (self.charEncoding[0], "certain")
-        else:
-            self.rawStream.seek(0)
-            self.charEncoding = (newEncoding, "certain")
-            self.reset()
-            raise _ReparseException("Encoding changed from %s to %s" % (self.charEncoding[0], newEncoding))
-
-    def detectBOM(self):
-        """Attempts to detect at BOM at the start of the stream. If
-        an encoding can be determined from the BOM return the name of the
-        encoding otherwise return None"""
-        bomDict = {
-            codecs.BOM_UTF8: 'utf-8',
-            codecs.BOM_UTF16_LE: 'utf-16le', codecs.BOM_UTF16_BE: 'utf-16be',
-            codecs.BOM_UTF32_LE: 'utf-32le', codecs.BOM_UTF32_BE: 'utf-32be'
-        }
-
-        # Go to beginning of file and read in 4 bytes
-        string = self.rawStream.read(4)
-        assert isinstance(string, bytes)
-
-        # Try detecting the BOM using bytes from the string
-        encoding = bomDict.get(string[:3])         # UTF-8
-        seek = 3
-        if not encoding:
-            # Need to detect UTF-32 before UTF-16
-            encoding = bomDict.get(string)         # UTF-32
-            seek = 4
-            if not encoding:
-                encoding = bomDict.get(string[:2])  # UTF-16
-                seek = 2
-
-        # Set the read position past the BOM if one was found, otherwise
-        # set it to the start of the stream
-        if encoding:
-            self.rawStream.seek(seek)
-            return lookupEncoding(encoding)
-        else:
-            self.rawStream.seek(0)
-            return None
-
-    def detectEncodingMeta(self):
-        """Report the encoding declared by the meta element
-        """
-        buffer = self.rawStream.read(self.numBytesMeta)
-        assert isinstance(buffer, bytes)
-        parser = EncodingParser(buffer)
-        self.rawStream.seek(0)
-        encoding = parser.getEncoding()
-
-        if encoding is not None and encoding.name in ("utf-16be", "utf-16le"):
-            encoding = lookupEncoding("utf-8")
-
-        return encoding
-
-
-class EncodingBytes(bytes):
-    """String-like object with an associated position and various extra methods
-    If the position is ever greater than the string length then an exception is
-    raised"""
-    def __new__(self, value):
-        assert isinstance(value, bytes)
-        return bytes.__new__(self, value.lower())
-
-    def __init__(self, value):
-        # pylint:disable=unused-argument
-        self._position = -1
-
-    def __iter__(self):
-        return self
-
-    def __next__(self):
-        p = self._position = self._position + 1
-        if p >= len(self):
-            raise StopIteration
-        elif p < 0:
-            raise TypeError
-        return self[p:p + 1]
-
-    def next(self):
-        # Py2 compat
-        return self.__next__()
-
-    def previous(self):
-        p = self._position
-        if p >= len(self):
-            raise StopIteration
-        elif p < 0:
-            raise TypeError
-        self._position = p = p - 1
-        return self[p:p + 1]
-
-    def setPosition(self, position):
-        if self._position >= len(self):
-            raise StopIteration
-        self._position = position
-
-    def getPosition(self):
-        if self._position >= len(self):
-            raise StopIteration
-        if self._position >= 0:
-            return self._position
-        else:
-            return None
-
-    position = property(getPosition, setPosition)
-
-    def getCurrentByte(self):
-        return self[self.position:self.position + 1]
-
-    currentByte = property(getCurrentByte)
-
-    def skip(self, chars=spaceCharactersBytes):
-        """Skip past a list of characters"""
-        p = self.position               # use property for the error-checking
-        while p < len(self):
-            c = self[p:p + 1]
-            if c not in chars:
-                self._position = p
-                return c
-            p += 1
-        self._position = p
-        return None
-
-    def skipUntil(self, chars):
-        p = self.position
-        while p < len(self):
-            c = self[p:p + 1]
-            if c in chars:
-                self._position = p
-                return c
-            p += 1
-        self._position = p
-        return None
-
-    def matchBytes(self, bytes):
-        """Look for a sequence of bytes at the start of a string. If the bytes
-        are found return True and advance the position to the byte after the
-        match. Otherwise return False and leave the position alone"""
-        p = self.position
-        data = self[p:p + len(bytes)]
-        rv = data.startswith(bytes)
-        if rv:
-            self.position += len(bytes)
-        return rv
-
-    def jumpTo(self, bytes):
-        """Look for the next sequence of bytes matching a given sequence. If
-        a match is found advance the position to the last byte of the match"""
-        newPosition = self[self.position:].find(bytes)
-        if newPosition > -1:
-            # XXX: This is ugly, but I can't see a nicer way to fix this.
-            if self._position == -1:
-                self._position = 0
-            self._position += (newPosition + len(bytes) - 1)
-            return True
-        else:
-            raise StopIteration
-
-
-class EncodingParser(object):
-    """Mini parser for detecting character encoding from meta elements"""
-
-    def __init__(self, data):
-        """string - the data to work on for encoding detection"""
-        self.data = EncodingBytes(data)
-        self.encoding = None
-
-    def getEncoding(self):
-        methodDispatch = (
-            (b"<!--", self.handleComment),
-            (b"<meta", self.handleMeta),
-            (b"</", self.handlePossibleEndTag),
-            (b"<!", self.handleOther),
-            (b"<?", self.handleOther),
-            (b"<", self.handlePossibleStartTag))
-        for _ in self.data:
-            keepParsing = True
-            for key, method in methodDispatch:
-                if self.data.matchBytes(key):
-                    try:
-                        keepParsing = method()
-                        break
-                    except StopIteration:
-                        keepParsing = False
-                        break
-            if not keepParsing:
-                break
-
-        return self.encoding
-
-    def handleComment(self):
-        """Skip over comments"""
-        return self.data.jumpTo(b"-->")
-
-    def handleMeta(self):
-        if self.data.currentByte not in spaceCharactersBytes:
-            # if we have <meta not followed by a space so just keep going
-            return True
-        # We have a valid meta element we want to search for attributes
-        hasPragma = False
-        pendingEncoding = None
-        while True:
-            # Try to find the next attribute after the current position
-            attr = self.getAttribute()
-            if attr is None:
-                return True
-            else:
-                if attr[0] == b"http-equiv":
-                    hasPragma = attr[1] == b"content-type"
-                    if hasPragma and pendingEncoding is not None:
-                        self.encoding = pendingEncoding
-                        return False
-                elif attr[0] == b"charset":
-                    tentativeEncoding = attr[1]
-                    codec = lookupEncoding(tentativeEncoding)
-                    if codec is not None:
-                        self.encoding = codec
-                        return False
-                elif attr[0] == b"content":
-                    contentParser = ContentAttrParser(EncodingBytes(attr[1]))
-                    tentativeEncoding = contentParser.parse()
-                    if tentativeEncoding is not None:
-                        codec = lookupEncoding(tentativeEncoding)
-                        if codec is not None:
-                            if hasPragma:
-                                self.encoding = codec
-                                return False
-                            else:
-                                pendingEncoding = codec
-
-    def handlePossibleStartTag(self):
-        return self.handlePossibleTag(False)
-
-    def handlePossibleEndTag(self):
-        next(self.data)
-        return self.handlePossibleTag(True)
-
-    def handlePossibleTag(self, endTag):
-        data = self.data
-        if data.currentByte not in asciiLettersBytes:
-            # If the next byte is not an ascii letter either ignore this
-            # fragment (possible start tag case) or treat it according to
-            # handleOther
-            if endTag:
-                data.previous()
-                self.handleOther()
-            return True
-
-        c = data.skipUntil(spacesAngleBrackets)
-        if c == b"<":
-            # return to the first step in the overall "two step" algorithm
-            # reprocessing the < byte
-            data.previous()
-        else:
-            # Read all attributes
-            attr = self.getAttribute()
-            while attr is not None:
-                attr = self.getAttribute()
-        return True
-
-    def handleOther(self):
-        return self.data.jumpTo(b">")
-
-    def getAttribute(self):
-        """Return a name,value pair for the next attribute in the stream,
-        if one is found, or None"""
-        data = self.data
-        # Step 1 (skip chars)
-        c = data.skip(spaceCharactersBytes | frozenset([b"/"]))
-        assert c is None or len(c) == 1
-        # Step 2
-        if c in (b">", None):
-            return None
-        # Step 3
-        attrName = []
-        attrValue = []
-        # Step 4 attribute name
-        while True:
-            if c == b"=" and attrName:
-                break
-            elif c in spaceCharactersBytes:
-                # Step 6!
-                c = data.skip()
-                break
-            elif c in (b"/", b">"):
-                return b"".join(attrName), b""
-            elif c in asciiUppercaseBytes:
-                attrName.append(c.lower())
-            elif c is None:
-                return None
-            else:
-                attrName.append(c)
-            # Step 5
-            c = next(data)
-        # Step 7
-        if c != b"=":
-            data.previous()
-            return b"".join(attrName), b""
-        # Step 8
-        next(data)
-        # Step 9
-        c = data.skip()
-        # Step 10
-        if c in (b"'", b'"'):
-            # 10.1
-            quoteChar = c
-            while True:
-                # 10.2
-                c = next(data)
-                # 10.3
-                if c == quoteChar:
-                    next(data)
-                    return b"".join(attrName), b"".join(attrValue)
-                # 10.4
-                elif c in asciiUppercaseBytes:
-                    attrValue.append(c.lower())
-                # 10.5
-                else:
-                    attrValue.append(c)
-        elif c == b">":
-            return b"".join(attrName), b""
-        elif c in asciiUppercaseBytes:
-            attrValue.append(c.lower())
-        elif c is None:
-            return None
-        else:
-            attrValue.append(c)
-        # Step 11
-        while True:
-            c = next(data)
-            if c in spacesAngleBrackets:
-                return b"".join(attrName), b"".join(attrValue)
-            elif c in asciiUppercaseBytes:
-                attrValue.append(c.lower())
-            elif c is None:
-                return None
-            else:
-                attrValue.append(c)
-
-
-class ContentAttrParser(object):
-    def __init__(self, data):
-        assert isinstance(data, bytes)
-        self.data = data
-
-    def parse(self):
-        try:
-            # Check if the attr name is charset
-            # otherwise return
-            self.data.jumpTo(b"charset")
-            self.data.position += 1
-            self.data.skip()
-            if not self.data.currentByte == b"=":
-                # If there is no = sign keep looking for attrs
-                return None
-            self.data.position += 1
-            self.data.skip()
-            # Look for an encoding between matching quote marks
-            if self.data.currentByte in (b'"', b"'"):
-                quoteMark = self.data.currentByte
-                self.data.position += 1
-                oldPosition = self.data.position
-                if self.data.jumpTo(quoteMark):
-                    return self.data[oldPosition:self.data.position]
-                else:
-                    return None
-            else:
-                # Unquoted value
-                oldPosition = self.data.position
-                try:
-                    self.data.skipUntil(spaceCharactersBytes)
-                    return self.data[oldPosition:self.data.position]
-                except StopIteration:
-                    # Return the whole remaining value
-                    return self.data[oldPosition:]
-        except StopIteration:
-            return None
-
-
-def lookupEncoding(encoding):
-    """Return the python codec name corresponding to an encoding or None if the
-    string doesn't correspond to a valid encoding."""
-    if isinstance(encoding, binary_type):
-        try:
-            encoding = encoding.decode("ascii")
-        except UnicodeDecodeError:
-            return None
-
-    if encoding is not None:
-        try:
-            return webencodings.lookup(encoding)
-        except AttributeError:
-            return None
-    else:
-        return None
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/_tokenizer.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/_tokenizer.py
deleted file mode 100644
index 178f6e7..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/_tokenizer.py
+++ /dev/null
@@ -1,1721 +0,0 @@
-from __future__ import absolute_import, division, unicode_literals
-
-from pip._vendor.six import unichr as chr
-
-from collections import deque
-
-from .constants import spaceCharacters
-from .constants import entities
-from .constants import asciiLetters, asciiUpper2Lower
-from .constants import digits, hexDigits, EOF
-from .constants import tokenTypes, tagTokenTypes
-from .constants import replacementCharacters
-
-from ._inputstream import HTMLInputStream
-
-from ._trie import Trie
-
-entitiesTrie = Trie(entities)
-
-
-class HTMLTokenizer(object):
-    """ This class takes care of tokenizing HTML.
-
-    * self.currentToken
-      Holds the token that is currently being processed.
-
-    * self.state
-      Holds a reference to the method to be invoked... XXX
-
-    * self.stream
-      Points to HTMLInputStream object.
-    """
-
-    def __init__(self, stream, parser=None, **kwargs):
-
-        self.stream = HTMLInputStream(stream, **kwargs)
-        self.parser = parser
-
-        # Setup the initial tokenizer state
-        self.escapeFlag = False
-        self.lastFourChars = []
-        self.state = self.dataState
-        self.escape = False
-
-        # The current token being created
-        self.currentToken = None
-        super(HTMLTokenizer, self).__init__()
-
-    def __iter__(self):
-        """ This is where the magic happens.
-
-        We do our usually processing through the states and when we have a token
-        to return we yield the token which pauses processing until the next token
-        is requested.
-        """
-        self.tokenQueue = deque([])
-        # Start processing. When EOF is reached self.state will return False
-        # instead of True and the loop will terminate.
-        while self.state():
-            while self.stream.errors:
-                yield {"type": tokenTypes["ParseError"], "data": self.stream.errors.pop(0)}
-            while self.tokenQueue:
-                yield self.tokenQueue.popleft()
-
-    def consumeNumberEntity(self, isHex):
-        """This function returns either U+FFFD or the character based on the
-        decimal or hexadecimal representation. It also discards ";" if present.
-        If not present self.tokenQueue.append({"type": tokenTypes["ParseError"]}) is invoked.
-        """
-
-        allowed = digits
-        radix = 10
-        if isHex:
-            allowed = hexDigits
-            radix = 16
-
-        charStack = []
-
-        # Consume all the characters that are in range while making sure we
-        # don't hit an EOF.
-        c = self.stream.char()
-        while c in allowed and c is not EOF:
-            charStack.append(c)
-            c = self.stream.char()
-
-        # Convert the set of characters consumed to an int.
-        charAsInt = int("".join(charStack), radix)
-
-        # Certain characters get replaced with others
-        if charAsInt in replacementCharacters:
-            char = replacementCharacters[charAsInt]
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "illegal-codepoint-for-numeric-entity",
-                                    "datavars": {"charAsInt": charAsInt}})
-        elif ((0xD800 <= charAsInt <= 0xDFFF) or
-              (charAsInt > 0x10FFFF)):
-            char = "\uFFFD"
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "illegal-codepoint-for-numeric-entity",
-                                    "datavars": {"charAsInt": charAsInt}})
-        else:
-            # Should speed up this check somehow (e.g. move the set to a constant)
-            if ((0x0001 <= charAsInt <= 0x0008) or
-                (0x000E <= charAsInt <= 0x001F) or
-                (0x007F <= charAsInt <= 0x009F) or
-                (0xFDD0 <= charAsInt <= 0xFDEF) or
-                charAsInt in frozenset([0x000B, 0xFFFE, 0xFFFF, 0x1FFFE,
-                                        0x1FFFF, 0x2FFFE, 0x2FFFF, 0x3FFFE,
-                                        0x3FFFF, 0x4FFFE, 0x4FFFF, 0x5FFFE,
-                                        0x5FFFF, 0x6FFFE, 0x6FFFF, 0x7FFFE,
-                                        0x7FFFF, 0x8FFFE, 0x8FFFF, 0x9FFFE,
-                                        0x9FFFF, 0xAFFFE, 0xAFFFF, 0xBFFFE,
-                                        0xBFFFF, 0xCFFFE, 0xCFFFF, 0xDFFFE,
-                                        0xDFFFF, 0xEFFFE, 0xEFFFF, 0xFFFFE,
-                                        0xFFFFF, 0x10FFFE, 0x10FFFF])):
-                self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                        "data":
-                                        "illegal-codepoint-for-numeric-entity",
-                                        "datavars": {"charAsInt": charAsInt}})
-            try:
-                # Try/except needed as UCS-2 Python builds' unichar only works
-                # within the BMP.
-                char = chr(charAsInt)
-            except ValueError:
-                v = charAsInt - 0x10000
-                char = chr(0xD800 | (v >> 10)) + chr(0xDC00 | (v & 0x3FF))
-
-        # Discard the ; if present. Otherwise, put it back on the queue and
-        # invoke parseError on parser.
-        if c != ";":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "numeric-entity-without-semicolon"})
-            self.stream.unget(c)
-
-        return char
-
-    def consumeEntity(self, allowedChar=None, fromAttribute=False):
-        # Initialise to the default output for when no entity is matched
-        output = "&"
-
-        charStack = [self.stream.char()]
-        if (charStack[0] in spaceCharacters or charStack[0] in (EOF, "<", "&") or
-                (allowedChar is not None and allowedChar == charStack[0])):
-            self.stream.unget(charStack[0])
-
-        elif charStack[0] == "#":
-            # Read the next character to see if it's hex or decimal
-            hex = False
-            charStack.append(self.stream.char())
-            if charStack[-1] in ("x", "X"):
-                hex = True
-                charStack.append(self.stream.char())
-
-            # charStack[-1] should be the first digit
-            if (hex and charStack[-1] in hexDigits) \
-                    or (not hex and charStack[-1] in digits):
-                # At least one digit found, so consume the whole number
-                self.stream.unget(charStack[-1])
-                output = self.consumeNumberEntity(hex)
-            else:
-                # No digits found
-                self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                        "data": "expected-numeric-entity"})
-                self.stream.unget(charStack.pop())
-                output = "&" + "".join(charStack)
-
-        else:
-            # At this point in the process might have named entity. Entities
-            # are stored in the global variable "entities".
-            #
-            # Consume characters and compare to these to a substring of the
-            # entity names in the list until the substring no longer matches.
-            while (charStack[-1] is not EOF):
-                if not entitiesTrie.has_keys_with_prefix("".join(charStack)):
-                    break
-                charStack.append(self.stream.char())
-
-            # At this point we have a string that starts with some characters
-            # that may match an entity
-            # Try to find the longest entity the string will match to take care
-            # of &noti for instance.
-            try:
-                entityName = entitiesTrie.longest_prefix("".join(charStack[:-1]))
-                entityLength = len(entityName)
-            except KeyError:
-                entityName = None
-
-            if entityName is not None:
-                if entityName[-1] != ";":
-                    self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                            "named-entity-without-semicolon"})
-                if (entityName[-1] != ";" and fromAttribute and
-                    (charStack[entityLength] in asciiLetters or
-                     charStack[entityLength] in digits or
-                     charStack[entityLength] == "=")):
-                    self.stream.unget(charStack.pop())
-                    output = "&" + "".join(charStack)
-                else:
-                    output = entities[entityName]
-                    self.stream.unget(charStack.pop())
-                    output += "".join(charStack[entityLength:])
-            else:
-                self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                        "expected-named-entity"})
-                self.stream.unget(charStack.pop())
-                output = "&" + "".join(charStack)
-
-        if fromAttribute:
-            self.currentToken["data"][-1][1] += output
-        else:
-            if output in spaceCharacters:
-                tokenType = "SpaceCharacters"
-            else:
-                tokenType = "Characters"
-            self.tokenQueue.append({"type": tokenTypes[tokenType], "data": output})
-
-    def processEntityInAttribute(self, allowedChar):
-        """This method replaces the need for "entityInAttributeValueState".
-        """
-        self.consumeEntity(allowedChar=allowedChar, fromAttribute=True)
-
-    def emitCurrentToken(self):
-        """This method is a generic handler for emitting the tags. It also sets
-        the state to "data" because that's what's needed after a token has been
-        emitted.
-        """
-        token = self.currentToken
-        # Add token to the queue to be yielded
-        if (token["type"] in tagTokenTypes):
-            token["name"] = token["name"].translate(asciiUpper2Lower)
-            if token["type"] == tokenTypes["EndTag"]:
-                if token["data"]:
-                    self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                            "data": "attributes-in-end-tag"})
-                if token["selfClosing"]:
-                    self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                            "data": "self-closing-flag-on-end-tag"})
-        self.tokenQueue.append(token)
-        self.state = self.dataState
-
-    # Below are the various tokenizer states worked out.
-    def dataState(self):
-        data = self.stream.char()
-        if data == "&":
-            self.state = self.entityDataState
-        elif data == "<":
-            self.state = self.tagOpenState
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.tokenQueue.append({"type": tokenTypes["Characters"],
-                                    "data": "\u0000"})
-        elif data is EOF:
-            # Tokenization ends.
-            return False
-        elif data in spaceCharacters:
-            # Directly after emitting a token you switch back to the "data
-            # state". At that point spaceCharacters are important so they are
-            # emitted separately.
-            self.tokenQueue.append({"type": tokenTypes["SpaceCharacters"], "data":
-                                    data + self.stream.charsUntil(spaceCharacters, True)})
-            # No need to update lastFourChars here, since the first space will
-            # have already been appended to lastFourChars and will have broken
-            # any <!-- or --> sequences
-        else:
-            chars = self.stream.charsUntil(("&", "<", "\u0000"))
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data":
-                                    data + chars})
-        return True
-
-    def entityDataState(self):
-        self.consumeEntity()
-        self.state = self.dataState
-        return True
-
-    def rcdataState(self):
-        data = self.stream.char()
-        if data == "&":
-            self.state = self.characterReferenceInRcdata
-        elif data == "<":
-            self.state = self.rcdataLessThanSignState
-        elif data == EOF:
-            # Tokenization ends.
-            return False
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.tokenQueue.append({"type": tokenTypes["Characters"],
-                                    "data": "\uFFFD"})
-        elif data in spaceCharacters:
-            # Directly after emitting a token you switch back to the "data
-            # state". At that point spaceCharacters are important so they are
-            # emitted separately.
-            self.tokenQueue.append({"type": tokenTypes["SpaceCharacters"], "data":
-                                    data + self.stream.charsUntil(spaceCharacters, True)})
-            # No need to update lastFourChars here, since the first space will
-            # have already been appended to lastFourChars and will have broken
-            # any <!-- or --> sequences
-        else:
-            chars = self.stream.charsUntil(("&", "<", "\u0000"))
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data":
-                                    data + chars})
-        return True
-
-    def characterReferenceInRcdata(self):
-        self.consumeEntity()
-        self.state = self.rcdataState
-        return True
-
-    def rawtextState(self):
-        data = self.stream.char()
-        if data == "<":
-            self.state = self.rawtextLessThanSignState
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.tokenQueue.append({"type": tokenTypes["Characters"],
-                                    "data": "\uFFFD"})
-        elif data == EOF:
-            # Tokenization ends.
-            return False
-        else:
-            chars = self.stream.charsUntil(("<", "\u0000"))
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data":
-                                    data + chars})
-        return True
-
-    def scriptDataState(self):
-        data = self.stream.char()
-        if data == "<":
-            self.state = self.scriptDataLessThanSignState
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.tokenQueue.append({"type": tokenTypes["Characters"],
-                                    "data": "\uFFFD"})
-        elif data == EOF:
-            # Tokenization ends.
-            return False
-        else:
-            chars = self.stream.charsUntil(("<", "\u0000"))
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data":
-                                    data + chars})
-        return True
-
-    def plaintextState(self):
-        data = self.stream.char()
-        if data == EOF:
-            # Tokenization ends.
-            return False
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.tokenQueue.append({"type": tokenTypes["Characters"],
-                                    "data": "\uFFFD"})
-        else:
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data":
-                                    data + self.stream.charsUntil("\u0000")})
-        return True
-
-    def tagOpenState(self):
-        data = self.stream.char()
-        if data == "!":
-            self.state = self.markupDeclarationOpenState
-        elif data == "/":
-            self.state = self.closeTagOpenState
-        elif data in asciiLetters:
-            self.currentToken = {"type": tokenTypes["StartTag"],
-                                 "name": data, "data": [],
-                                 "selfClosing": False,
-                                 "selfClosingAcknowledged": False}
-            self.state = self.tagNameState
-        elif data == ">":
-            # XXX In theory it could be something besides a tag name. But
-            # do we really care?
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "expected-tag-name-but-got-right-bracket"})
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<>"})
-            self.state = self.dataState
-        elif data == "?":
-            # XXX In theory it could be something besides a tag name. But
-            # do we really care?
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "expected-tag-name-but-got-question-mark"})
-            self.stream.unget(data)
-            self.state = self.bogusCommentState
-        else:
-            # XXX
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "expected-tag-name"})
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
-            self.stream.unget(data)
-            self.state = self.dataState
-        return True
-
-    def closeTagOpenState(self):
-        data = self.stream.char()
-        if data in asciiLetters:
-            self.currentToken = {"type": tokenTypes["EndTag"], "name": data,
-                                 "data": [], "selfClosing": False}
-            self.state = self.tagNameState
-        elif data == ">":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "expected-closing-tag-but-got-right-bracket"})
-            self.state = self.dataState
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "expected-closing-tag-but-got-eof"})
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "</"})
-            self.state = self.dataState
-        else:
-            # XXX data can be _'_...
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "expected-closing-tag-but-got-char",
-                                    "datavars": {"data": data}})
-            self.stream.unget(data)
-            self.state = self.bogusCommentState
-        return True
-
-    def tagNameState(self):
-        data = self.stream.char()
-        if data in spaceCharacters:
-            self.state = self.beforeAttributeNameState
-        elif data == ">":
-            self.emitCurrentToken()
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "eof-in-tag-name"})
-            self.state = self.dataState
-        elif data == "/":
-            self.state = self.selfClosingStartTagState
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.currentToken["name"] += "\uFFFD"
-        else:
-            self.currentToken["name"] += data
-            # (Don't use charsUntil here, because tag names are
-            # very short and it's faster to not do anything fancy)
-        return True
-
-    def rcdataLessThanSignState(self):
-        data = self.stream.char()
-        if data == "/":
-            self.temporaryBuffer = ""
-            self.state = self.rcdataEndTagOpenState
-        else:
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
-            self.stream.unget(data)
-            self.state = self.rcdataState
-        return True
-
-    def rcdataEndTagOpenState(self):
-        data = self.stream.char()
-        if data in asciiLetters:
-            self.temporaryBuffer += data
-            self.state = self.rcdataEndTagNameState
-        else:
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "</"})
-            self.stream.unget(data)
-            self.state = self.rcdataState
-        return True
-
-    def rcdataEndTagNameState(self):
-        appropriate = self.currentToken and self.currentToken["name"].lower() == self.temporaryBuffer.lower()
-        data = self.stream.char()
-        if data in spaceCharacters and appropriate:
-            self.currentToken = {"type": tokenTypes["EndTag"],
-                                 "name": self.temporaryBuffer,
-                                 "data": [], "selfClosing": False}
-            self.state = self.beforeAttributeNameState
-        elif data == "/" and appropriate:
-            self.currentToken = {"type": tokenTypes["EndTag"],
-                                 "name": self.temporaryBuffer,
-                                 "data": [], "selfClosing": False}
-            self.state = self.selfClosingStartTagState
-        elif data == ">" and appropriate:
-            self.currentToken = {"type": tokenTypes["EndTag"],
-                                 "name": self.temporaryBuffer,
-                                 "data": [], "selfClosing": False}
-            self.emitCurrentToken()
-            self.state = self.dataState
-        elif data in asciiLetters:
-            self.temporaryBuffer += data
-        else:
-            self.tokenQueue.append({"type": tokenTypes["Characters"],
-                                    "data": "</" + self.temporaryBuffer})
-            self.stream.unget(data)
-            self.state = self.rcdataState
-        return True
-
-    def rawtextLessThanSignState(self):
-        data = self.stream.char()
-        if data == "/":
-            self.temporaryBuffer = ""
-            self.state = self.rawtextEndTagOpenState
-        else:
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
-            self.stream.unget(data)
-            self.state = self.rawtextState
-        return True
-
-    def rawtextEndTagOpenState(self):
-        data = self.stream.char()
-        if data in asciiLetters:
-            self.temporaryBuffer += data
-            self.state = self.rawtextEndTagNameState
-        else:
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "</"})
-            self.stream.unget(data)
-            self.state = self.rawtextState
-        return True
-
-    def rawtextEndTagNameState(self):
-        appropriate = self.currentToken and self.currentToken["name"].lower() == self.temporaryBuffer.lower()
-        data = self.stream.char()
-        if data in spaceCharacters and appropriate:
-            self.currentToken = {"type": tokenTypes["EndTag"],
-                                 "name": self.temporaryBuffer,
-                                 "data": [], "selfClosing": False}
-            self.state = self.beforeAttributeNameState
-        elif data == "/" and appropriate:
-            self.currentToken = {"type": tokenTypes["EndTag"],
-                                 "name": self.temporaryBuffer,
-                                 "data": [], "selfClosing": False}
-            self.state = self.selfClosingStartTagState
-        elif data == ">" and appropriate:
-            self.currentToken = {"type": tokenTypes["EndTag"],
-                                 "name": self.temporaryBuffer,
-                                 "data": [], "selfClosing": False}
-            self.emitCurrentToken()
-            self.state = self.dataState
-        elif data in asciiLetters:
-            self.temporaryBuffer += data
-        else:
-            self.tokenQueue.append({"type": tokenTypes["Characters"],
-                                    "data": "</" + self.temporaryBuffer})
-            self.stream.unget(data)
-            self.state = self.rawtextState
-        return True
-
-    def scriptDataLessThanSignState(self):
-        data = self.stream.char()
-        if data == "/":
-            self.temporaryBuffer = ""
-            self.state = self.scriptDataEndTagOpenState
-        elif data == "!":
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<!"})
-            self.state = self.scriptDataEscapeStartState
-        else:
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
-            self.stream.unget(data)
-            self.state = self.scriptDataState
-        return True
-
-    def scriptDataEndTagOpenState(self):
-        data = self.stream.char()
-        if data in asciiLetters:
-            self.temporaryBuffer += data
-            self.state = self.scriptDataEndTagNameState
-        else:
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "</"})
-            self.stream.unget(data)
-            self.state = self.scriptDataState
-        return True
-
-    def scriptDataEndTagNameState(self):
-        appropriate = self.currentToken and self.currentToken["name"].lower() == self.temporaryBuffer.lower()
-        data = self.stream.char()
-        if data in spaceCharacters and appropriate:
-            self.currentToken = {"type": tokenTypes["EndTag"],
-                                 "name": self.temporaryBuffer,
-                                 "data": [], "selfClosing": False}
-            self.state = self.beforeAttributeNameState
-        elif data == "/" and appropriate:
-            self.currentToken = {"type": tokenTypes["EndTag"],
-                                 "name": self.temporaryBuffer,
-                                 "data": [], "selfClosing": False}
-            self.state = self.selfClosingStartTagState
-        elif data == ">" and appropriate:
-            self.currentToken = {"type": tokenTypes["EndTag"],
-                                 "name": self.temporaryBuffer,
-                                 "data": [], "selfClosing": False}
-            self.emitCurrentToken()
-            self.state = self.dataState
-        elif data in asciiLetters:
-            self.temporaryBuffer += data
-        else:
-            self.tokenQueue.append({"type": tokenTypes["Characters"],
-                                    "data": "</" + self.temporaryBuffer})
-            self.stream.unget(data)
-            self.state = self.scriptDataState
-        return True
-
-    def scriptDataEscapeStartState(self):
-        data = self.stream.char()
-        if data == "-":
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
-            self.state = self.scriptDataEscapeStartDashState
-        else:
-            self.stream.unget(data)
-            self.state = self.scriptDataState
-        return True
-
-    def scriptDataEscapeStartDashState(self):
-        data = self.stream.char()
-        if data == "-":
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
-            self.state = self.scriptDataEscapedDashDashState
-        else:
-            self.stream.unget(data)
-            self.state = self.scriptDataState
-        return True
-
-    def scriptDataEscapedState(self):
-        data = self.stream.char()
-        if data == "-":
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
-            self.state = self.scriptDataEscapedDashState
-        elif data == "<":
-            self.state = self.scriptDataEscapedLessThanSignState
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.tokenQueue.append({"type": tokenTypes["Characters"],
-                                    "data": "\uFFFD"})
-        elif data == EOF:
-            self.state = self.dataState
-        else:
-            chars = self.stream.charsUntil(("<", "-", "\u0000"))
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data":
-                                    data + chars})
-        return True
-
-    def scriptDataEscapedDashState(self):
-        data = self.stream.char()
-        if data == "-":
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
-            self.state = self.scriptDataEscapedDashDashState
-        elif data == "<":
-            self.state = self.scriptDataEscapedLessThanSignState
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.tokenQueue.append({"type": tokenTypes["Characters"],
-                                    "data": "\uFFFD"})
-            self.state = self.scriptDataEscapedState
-        elif data == EOF:
-            self.state = self.dataState
-        else:
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
-            self.state = self.scriptDataEscapedState
-        return True
-
-    def scriptDataEscapedDashDashState(self):
-        data = self.stream.char()
-        if data == "-":
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
-        elif data == "<":
-            self.state = self.scriptDataEscapedLessThanSignState
-        elif data == ">":
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": ">"})
-            self.state = self.scriptDataState
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.tokenQueue.append({"type": tokenTypes["Characters"],
-                                    "data": "\uFFFD"})
-            self.state = self.scriptDataEscapedState
-        elif data == EOF:
-            self.state = self.dataState
-        else:
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
-            self.state = self.scriptDataEscapedState
-        return True
-
-    def scriptDataEscapedLessThanSignState(self):
-        data = self.stream.char()
-        if data == "/":
-            self.temporaryBuffer = ""
-            self.state = self.scriptDataEscapedEndTagOpenState
-        elif data in asciiLetters:
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<" + data})
-            self.temporaryBuffer = data
-            self.state = self.scriptDataDoubleEscapeStartState
-        else:
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
-            self.stream.unget(data)
-            self.state = self.scriptDataEscapedState
-        return True
-
-    def scriptDataEscapedEndTagOpenState(self):
-        data = self.stream.char()
-        if data in asciiLetters:
-            self.temporaryBuffer = data
-            self.state = self.scriptDataEscapedEndTagNameState
-        else:
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "</"})
-            self.stream.unget(data)
-            self.state = self.scriptDataEscapedState
-        return True
-
-    def scriptDataEscapedEndTagNameState(self):
-        appropriate = self.currentToken and self.currentToken["name"].lower() == self.temporaryBuffer.lower()
-        data = self.stream.char()
-        if data in spaceCharacters and appropriate:
-            self.currentToken = {"type": tokenTypes["EndTag"],
-                                 "name": self.temporaryBuffer,
-                                 "data": [], "selfClosing": False}
-            self.state = self.beforeAttributeNameState
-        elif data == "/" and appropriate:
-            self.currentToken = {"type": tokenTypes["EndTag"],
-                                 "name": self.temporaryBuffer,
-                                 "data": [], "selfClosing": False}
-            self.state = self.selfClosingStartTagState
-        elif data == ">" and appropriate:
-            self.currentToken = {"type": tokenTypes["EndTag"],
-                                 "name": self.temporaryBuffer,
-                                 "data": [], "selfClosing": False}
-            self.emitCurrentToken()
-            self.state = self.dataState
-        elif data in asciiLetters:
-            self.temporaryBuffer += data
-        else:
-            self.tokenQueue.append({"type": tokenTypes["Characters"],
-                                    "data": "</" + self.temporaryBuffer})
-            self.stream.unget(data)
-            self.state = self.scriptDataEscapedState
-        return True
-
-    def scriptDataDoubleEscapeStartState(self):
-        data = self.stream.char()
-        if data in (spaceCharacters | frozenset(("/", ">"))):
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
-            if self.temporaryBuffer.lower() == "script":
-                self.state = self.scriptDataDoubleEscapedState
-            else:
-                self.state = self.scriptDataEscapedState
-        elif data in asciiLetters:
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
-            self.temporaryBuffer += data
-        else:
-            self.stream.unget(data)
-            self.state = self.scriptDataEscapedState
-        return True
-
-    def scriptDataDoubleEscapedState(self):
-        data = self.stream.char()
-        if data == "-":
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
-            self.state = self.scriptDataDoubleEscapedDashState
-        elif data == "<":
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
-            self.state = self.scriptDataDoubleEscapedLessThanSignState
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.tokenQueue.append({"type": tokenTypes["Characters"],
-                                    "data": "\uFFFD"})
-        elif data == EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "eof-in-script-in-script"})
-            self.state = self.dataState
-        else:
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
-        return True
-
-    def scriptDataDoubleEscapedDashState(self):
-        data = self.stream.char()
-        if data == "-":
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
-            self.state = self.scriptDataDoubleEscapedDashDashState
-        elif data == "<":
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
-            self.state = self.scriptDataDoubleEscapedLessThanSignState
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.tokenQueue.append({"type": tokenTypes["Characters"],
-                                    "data": "\uFFFD"})
-            self.state = self.scriptDataDoubleEscapedState
-        elif data == EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "eof-in-script-in-script"})
-            self.state = self.dataState
-        else:
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
-            self.state = self.scriptDataDoubleEscapedState
-        return True
-
-    def scriptDataDoubleEscapedDashDashState(self):
-        data = self.stream.char()
-        if data == "-":
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
-        elif data == "<":
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
-            self.state = self.scriptDataDoubleEscapedLessThanSignState
-        elif data == ">":
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": ">"})
-            self.state = self.scriptDataState
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.tokenQueue.append({"type": tokenTypes["Characters"],
-                                    "data": "\uFFFD"})
-            self.state = self.scriptDataDoubleEscapedState
-        elif data == EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "eof-in-script-in-script"})
-            self.state = self.dataState
-        else:
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
-            self.state = self.scriptDataDoubleEscapedState
-        return True
-
-    def scriptDataDoubleEscapedLessThanSignState(self):
-        data = self.stream.char()
-        if data == "/":
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "/"})
-            self.temporaryBuffer = ""
-            self.state = self.scriptDataDoubleEscapeEndState
-        else:
-            self.stream.unget(data)
-            self.state = self.scriptDataDoubleEscapedState
-        return True
-
-    def scriptDataDoubleEscapeEndState(self):
-        data = self.stream.char()
-        if data in (spaceCharacters | frozenset(("/", ">"))):
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
-            if self.temporaryBuffer.lower() == "script":
-                self.state = self.scriptDataEscapedState
-            else:
-                self.state = self.scriptDataDoubleEscapedState
-        elif data in asciiLetters:
-            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
-            self.temporaryBuffer += data
-        else:
-            self.stream.unget(data)
-            self.state = self.scriptDataDoubleEscapedState
-        return True
-
-    def beforeAttributeNameState(self):
-        data = self.stream.char()
-        if data in spaceCharacters:
-            self.stream.charsUntil(spaceCharacters, True)
-        elif data in asciiLetters:
-            self.currentToken["data"].append([data, ""])
-            self.state = self.attributeNameState
-        elif data == ">":
-            self.emitCurrentToken()
-        elif data == "/":
-            self.state = self.selfClosingStartTagState
-        elif data in ("'", '"', "=", "<"):
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "invalid-character-in-attribute-name"})
-            self.currentToken["data"].append([data, ""])
-            self.state = self.attributeNameState
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.currentToken["data"].append(["\uFFFD", ""])
-            self.state = self.attributeNameState
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "expected-attribute-name-but-got-eof"})
-            self.state = self.dataState
-        else:
-            self.currentToken["data"].append([data, ""])
-            self.state = self.attributeNameState
-        return True
-
-    def attributeNameState(self):
-        data = self.stream.char()
-        leavingThisState = True
-        emitToken = False
-        if data == "=":
-            self.state = self.beforeAttributeValueState
-        elif data in asciiLetters:
-            self.currentToken["data"][-1][0] += data +\
-                self.stream.charsUntil(asciiLetters, True)
-            leavingThisState = False
-        elif data == ">":
-            # XXX If we emit here the attributes are converted to a dict
-            # without being checked and when the code below runs we error
-            # because data is a dict not a list
-            emitToken = True
-        elif data in spaceCharacters:
-            self.state = self.afterAttributeNameState
-        elif data == "/":
-            self.state = self.selfClosingStartTagState
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.currentToken["data"][-1][0] += "\uFFFD"
-            leavingThisState = False
-        elif data in ("'", '"', "<"):
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data":
-                                    "invalid-character-in-attribute-name"})
-            self.currentToken["data"][-1][0] += data
-            leavingThisState = False
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "eof-in-attribute-name"})
-            self.state = self.dataState
-        else:
-            self.currentToken["data"][-1][0] += data
-            leavingThisState = False
-
-        if leavingThisState:
-            # Attributes are not dropped at this stage. That happens when the
-            # start tag token is emitted so values can still be safely appended
-            # to attributes, but we do want to report the parse error in time.
-            self.currentToken["data"][-1][0] = (
-                self.currentToken["data"][-1][0].translate(asciiUpper2Lower))
-            for name, _ in self.currentToken["data"][:-1]:
-                if self.currentToken["data"][-1][0] == name:
-                    self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                            "duplicate-attribute"})
-                    break
-            # XXX Fix for above XXX
-            if emitToken:
-                self.emitCurrentToken()
-        return True
-
-    def afterAttributeNameState(self):
-        data = self.stream.char()
-        if data in spaceCharacters:
-            self.stream.charsUntil(spaceCharacters, True)
-        elif data == "=":
-            self.state = self.beforeAttributeValueState
-        elif data == ">":
-            self.emitCurrentToken()
-        elif data in asciiLetters:
-            self.currentToken["data"].append([data, ""])
-            self.state = self.attributeNameState
-        elif data == "/":
-            self.state = self.selfClosingStartTagState
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.currentToken["data"].append(["\uFFFD", ""])
-            self.state = self.attributeNameState
-        elif data in ("'", '"', "<"):
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "invalid-character-after-attribute-name"})
-            self.currentToken["data"].append([data, ""])
-            self.state = self.attributeNameState
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "expected-end-of-tag-but-got-eof"})
-            self.state = self.dataState
-        else:
-            self.currentToken["data"].append([data, ""])
-            self.state = self.attributeNameState
-        return True
-
-    def beforeAttributeValueState(self):
-        data = self.stream.char()
-        if data in spaceCharacters:
-            self.stream.charsUntil(spaceCharacters, True)
-        elif data == "\"":
-            self.state = self.attributeValueDoubleQuotedState
-        elif data == "&":
-            self.state = self.attributeValueUnQuotedState
-            self.stream.unget(data)
-        elif data == "'":
-            self.state = self.attributeValueSingleQuotedState
-        elif data == ">":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "expected-attribute-value-but-got-right-bracket"})
-            self.emitCurrentToken()
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.currentToken["data"][-1][1] += "\uFFFD"
-            self.state = self.attributeValueUnQuotedState
-        elif data in ("=", "<", "`"):
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "equals-in-unquoted-attribute-value"})
-            self.currentToken["data"][-1][1] += data
-            self.state = self.attributeValueUnQuotedState
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "expected-attribute-value-but-got-eof"})
-            self.state = self.dataState
-        else:
-            self.currentToken["data"][-1][1] += data
-            self.state = self.attributeValueUnQuotedState
-        return True
-
-    def attributeValueDoubleQuotedState(self):
-        data = self.stream.char()
-        if data == "\"":
-            self.state = self.afterAttributeValueState
-        elif data == "&":
-            self.processEntityInAttribute('"')
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.currentToken["data"][-1][1] += "\uFFFD"
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "eof-in-attribute-value-double-quote"})
-            self.state = self.dataState
-        else:
-            self.currentToken["data"][-1][1] += data +\
-                self.stream.charsUntil(("\"", "&", "\u0000"))
-        return True
-
-    def attributeValueSingleQuotedState(self):
-        data = self.stream.char()
-        if data == "'":
-            self.state = self.afterAttributeValueState
-        elif data == "&":
-            self.processEntityInAttribute("'")
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.currentToken["data"][-1][1] += "\uFFFD"
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "eof-in-attribute-value-single-quote"})
-            self.state = self.dataState
-        else:
-            self.currentToken["data"][-1][1] += data +\
-                self.stream.charsUntil(("'", "&", "\u0000"))
-        return True
-
-    def attributeValueUnQuotedState(self):
-        data = self.stream.char()
-        if data in spaceCharacters:
-            self.state = self.beforeAttributeNameState
-        elif data == "&":
-            self.processEntityInAttribute(">")
-        elif data == ">":
-            self.emitCurrentToken()
-        elif data in ('"', "'", "=", "<", "`"):
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "unexpected-character-in-unquoted-attribute-value"})
-            self.currentToken["data"][-1][1] += data
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.currentToken["data"][-1][1] += "\uFFFD"
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "eof-in-attribute-value-no-quotes"})
-            self.state = self.dataState
-        else:
-            self.currentToken["data"][-1][1] += data + self.stream.charsUntil(
-                frozenset(("&", ">", '"', "'", "=", "<", "`", "\u0000")) | spaceCharacters)
-        return True
-
-    def afterAttributeValueState(self):
-        data = self.stream.char()
-        if data in spaceCharacters:
-            self.state = self.beforeAttributeNameState
-        elif data == ">":
-            self.emitCurrentToken()
-        elif data == "/":
-            self.state = self.selfClosingStartTagState
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "unexpected-EOF-after-attribute-value"})
-            self.stream.unget(data)
-            self.state = self.dataState
-        else:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "unexpected-character-after-attribute-value"})
-            self.stream.unget(data)
-            self.state = self.beforeAttributeNameState
-        return True
-
-    def selfClosingStartTagState(self):
-        data = self.stream.char()
-        if data == ">":
-            self.currentToken["selfClosing"] = True
-            self.emitCurrentToken()
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data":
-                                    "unexpected-EOF-after-solidus-in-tag"})
-            self.stream.unget(data)
-            self.state = self.dataState
-        else:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "unexpected-character-after-solidus-in-tag"})
-            self.stream.unget(data)
-            self.state = self.beforeAttributeNameState
-        return True
-
-    def bogusCommentState(self):
-        # Make a new comment token and give it as value all the characters
-        # until the first > or EOF (charsUntil checks for EOF automatically)
-        # and emit it.
-        data = self.stream.charsUntil(">")
-        data = data.replace("\u0000", "\uFFFD")
-        self.tokenQueue.append(
-            {"type": tokenTypes["Comment"], "data": data})
-
-        # Eat the character directly after the bogus comment which is either a
-        # ">" or an EOF.
-        self.stream.char()
-        self.state = self.dataState
-        return True
-
-    def markupDeclarationOpenState(self):
-        charStack = [self.stream.char()]
-        if charStack[-1] == "-":
-            charStack.append(self.stream.char())
-            if charStack[-1] == "-":
-                self.currentToken = {"type": tokenTypes["Comment"], "data": ""}
-                self.state = self.commentStartState
-                return True
-        elif charStack[-1] in ('d', 'D'):
-            matched = True
-            for expected in (('o', 'O'), ('c', 'C'), ('t', 'T'),
-                             ('y', 'Y'), ('p', 'P'), ('e', 'E')):
-                charStack.append(self.stream.char())
-                if charStack[-1] not in expected:
-                    matched = False
-                    break
-            if matched:
-                self.currentToken = {"type": tokenTypes["Doctype"],
-                                     "name": "",
-                                     "publicId": None, "systemId": None,
-                                     "correct": True}
-                self.state = self.doctypeState
-                return True
-        elif (charStack[-1] == "[" and
-              self.parser is not None and
-              self.parser.tree.openElements and
-              self.parser.tree.openElements[-1].namespace != self.parser.tree.defaultNamespace):
-            matched = True
-            for expected in ["C", "D", "A", "T", "A", "["]:
-                charStack.append(self.stream.char())
-                if charStack[-1] != expected:
-                    matched = False
-                    break
-            if matched:
-                self.state = self.cdataSectionState
-                return True
-
-        self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                "expected-dashes-or-doctype"})
-
-        while charStack:
-            self.stream.unget(charStack.pop())
-        self.state = self.bogusCommentState
-        return True
-
-    def commentStartState(self):
-        data = self.stream.char()
-        if data == "-":
-            self.state = self.commentStartDashState
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.currentToken["data"] += "\uFFFD"
-        elif data == ">":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "incorrect-comment"})
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "eof-in-comment"})
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        else:
-            self.currentToken["data"] += data
-            self.state = self.commentState
-        return True
-
-    def commentStartDashState(self):
-        data = self.stream.char()
-        if data == "-":
-            self.state = self.commentEndState
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.currentToken["data"] += "-\uFFFD"
-        elif data == ">":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "incorrect-comment"})
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "eof-in-comment"})
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        else:
-            self.currentToken["data"] += "-" + data
-            self.state = self.commentState
-        return True
-
-    def commentState(self):
-        data = self.stream.char()
-        if data == "-":
-            self.state = self.commentEndDashState
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.currentToken["data"] += "\uFFFD"
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "eof-in-comment"})
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        else:
-            self.currentToken["data"] += data + \
-                self.stream.charsUntil(("-", "\u0000"))
-        return True
-
-    def commentEndDashState(self):
-        data = self.stream.char()
-        if data == "-":
-            self.state = self.commentEndState
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.currentToken["data"] += "-\uFFFD"
-            self.state = self.commentState
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "eof-in-comment-end-dash"})
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        else:
-            self.currentToken["data"] += "-" + data
-            self.state = self.commentState
-        return True
-
-    def commentEndState(self):
-        data = self.stream.char()
-        if data == ">":
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.currentToken["data"] += "--\uFFFD"
-            self.state = self.commentState
-        elif data == "!":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "unexpected-bang-after-double-dash-in-comment"})
-            self.state = self.commentEndBangState
-        elif data == "-":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "unexpected-dash-after-double-dash-in-comment"})
-            self.currentToken["data"] += data
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "eof-in-comment-double-dash"})
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        else:
-            # XXX
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "unexpected-char-in-comment"})
-            self.currentToken["data"] += "--" + data
-            self.state = self.commentState
-        return True
-
-    def commentEndBangState(self):
-        data = self.stream.char()
-        if data == ">":
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        elif data == "-":
-            self.currentToken["data"] += "--!"
-            self.state = self.commentEndDashState
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.currentToken["data"] += "--!\uFFFD"
-            self.state = self.commentState
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "eof-in-comment-end-bang-state"})
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        else:
-            self.currentToken["data"] += "--!" + data
-            self.state = self.commentState
-        return True
-
-    def doctypeState(self):
-        data = self.stream.char()
-        if data in spaceCharacters:
-            self.state = self.beforeDoctypeNameState
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "expected-doctype-name-but-got-eof"})
-            self.currentToken["correct"] = False
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        else:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "need-space-after-doctype"})
-            self.stream.unget(data)
-            self.state = self.beforeDoctypeNameState
-        return True
-
-    def beforeDoctypeNameState(self):
-        data = self.stream.char()
-        if data in spaceCharacters:
-            pass
-        elif data == ">":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "expected-doctype-name-but-got-right-bracket"})
-            self.currentToken["correct"] = False
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.currentToken["name"] = "\uFFFD"
-            self.state = self.doctypeNameState
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "expected-doctype-name-but-got-eof"})
-            self.currentToken["correct"] = False
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        else:
-            self.currentToken["name"] = data
-            self.state = self.doctypeNameState
-        return True
-
-    def doctypeNameState(self):
-        data = self.stream.char()
-        if data in spaceCharacters:
-            self.currentToken["name"] = self.currentToken["name"].translate(asciiUpper2Lower)
-            self.state = self.afterDoctypeNameState
-        elif data == ">":
-            self.currentToken["name"] = self.currentToken["name"].translate(asciiUpper2Lower)
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.currentToken["name"] += "\uFFFD"
-            self.state = self.doctypeNameState
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "eof-in-doctype-name"})
-            self.currentToken["correct"] = False
-            self.currentToken["name"] = self.currentToken["name"].translate(asciiUpper2Lower)
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        else:
-            self.currentToken["name"] += data
-        return True
-
-    def afterDoctypeNameState(self):
-        data = self.stream.char()
-        if data in spaceCharacters:
-            pass
-        elif data == ">":
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        elif data is EOF:
-            self.currentToken["correct"] = False
-            self.stream.unget(data)
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "eof-in-doctype"})
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        else:
-            if data in ("p", "P"):
-                matched = True
-                for expected in (("u", "U"), ("b", "B"), ("l", "L"),
-                                 ("i", "I"), ("c", "C")):
-                    data = self.stream.char()
-                    if data not in expected:
-                        matched = False
-                        break
-                if matched:
-                    self.state = self.afterDoctypePublicKeywordState
-                    return True
-            elif data in ("s", "S"):
-                matched = True
-                for expected in (("y", "Y"), ("s", "S"), ("t", "T"),
-                                 ("e", "E"), ("m", "M")):
-                    data = self.stream.char()
-                    if data not in expected:
-                        matched = False
-                        break
-                if matched:
-                    self.state = self.afterDoctypeSystemKeywordState
-                    return True
-
-            # All the characters read before the current 'data' will be
-            # [a-zA-Z], so they're garbage in the bogus doctype and can be
-            # discarded; only the latest character might be '>' or EOF
-            # and needs to be ungetted
-            self.stream.unget(data)
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "expected-space-or-right-bracket-in-doctype", "datavars":
-                                    {"data": data}})
-            self.currentToken["correct"] = False
-            self.state = self.bogusDoctypeState
-
-        return True
-
-    def afterDoctypePublicKeywordState(self):
-        data = self.stream.char()
-        if data in spaceCharacters:
-            self.state = self.beforeDoctypePublicIdentifierState
-        elif data in ("'", '"'):
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "unexpected-char-in-doctype"})
-            self.stream.unget(data)
-            self.state = self.beforeDoctypePublicIdentifierState
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "eof-in-doctype"})
-            self.currentToken["correct"] = False
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        else:
-            self.stream.unget(data)
-            self.state = self.beforeDoctypePublicIdentifierState
-        return True
-
-    def beforeDoctypePublicIdentifierState(self):
-        data = self.stream.char()
-        if data in spaceCharacters:
-            pass
-        elif data == "\"":
-            self.currentToken["publicId"] = ""
-            self.state = self.doctypePublicIdentifierDoubleQuotedState
-        elif data == "'":
-            self.currentToken["publicId"] = ""
-            self.state = self.doctypePublicIdentifierSingleQuotedState
-        elif data == ">":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "unexpected-end-of-doctype"})
-            self.currentToken["correct"] = False
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "eof-in-doctype"})
-            self.currentToken["correct"] = False
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        else:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "unexpected-char-in-doctype"})
-            self.currentToken["correct"] = False
-            self.state = self.bogusDoctypeState
-        return True
-
-    def doctypePublicIdentifierDoubleQuotedState(self):
-        data = self.stream.char()
-        if data == "\"":
-            self.state = self.afterDoctypePublicIdentifierState
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.currentToken["publicId"] += "\uFFFD"
-        elif data == ">":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "unexpected-end-of-doctype"})
-            self.currentToken["correct"] = False
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "eof-in-doctype"})
-            self.currentToken["correct"] = False
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        else:
-            self.currentToken["publicId"] += data
-        return True
-
-    def doctypePublicIdentifierSingleQuotedState(self):
-        data = self.stream.char()
-        if data == "'":
-            self.state = self.afterDoctypePublicIdentifierState
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.currentToken["publicId"] += "\uFFFD"
-        elif data == ">":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "unexpected-end-of-doctype"})
-            self.currentToken["correct"] = False
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "eof-in-doctype"})
-            self.currentToken["correct"] = False
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        else:
-            self.currentToken["publicId"] += data
-        return True
-
-    def afterDoctypePublicIdentifierState(self):
-        data = self.stream.char()
-        if data in spaceCharacters:
-            self.state = self.betweenDoctypePublicAndSystemIdentifiersState
-        elif data == ">":
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        elif data == '"':
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "unexpected-char-in-doctype"})
-            self.currentToken["systemId"] = ""
-            self.state = self.doctypeSystemIdentifierDoubleQuotedState
-        elif data == "'":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "unexpected-char-in-doctype"})
-            self.currentToken["systemId"] = ""
-            self.state = self.doctypeSystemIdentifierSingleQuotedState
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "eof-in-doctype"})
-            self.currentToken["correct"] = False
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        else:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "unexpected-char-in-doctype"})
-            self.currentToken["correct"] = False
-            self.state = self.bogusDoctypeState
-        return True
-
-    def betweenDoctypePublicAndSystemIdentifiersState(self):
-        data = self.stream.char()
-        if data in spaceCharacters:
-            pass
-        elif data == ">":
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        elif data == '"':
-            self.currentToken["systemId"] = ""
-            self.state = self.doctypeSystemIdentifierDoubleQuotedState
-        elif data == "'":
-            self.currentToken["systemId"] = ""
-            self.state = self.doctypeSystemIdentifierSingleQuotedState
-        elif data == EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "eof-in-doctype"})
-            self.currentToken["correct"] = False
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        else:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "unexpected-char-in-doctype"})
-            self.currentToken["correct"] = False
-            self.state = self.bogusDoctypeState
-        return True
-
-    def afterDoctypeSystemKeywordState(self):
-        data = self.stream.char()
-        if data in spaceCharacters:
-            self.state = self.beforeDoctypeSystemIdentifierState
-        elif data in ("'", '"'):
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "unexpected-char-in-doctype"})
-            self.stream.unget(data)
-            self.state = self.beforeDoctypeSystemIdentifierState
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "eof-in-doctype"})
-            self.currentToken["correct"] = False
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        else:
-            self.stream.unget(data)
-            self.state = self.beforeDoctypeSystemIdentifierState
-        return True
-
-    def beforeDoctypeSystemIdentifierState(self):
-        data = self.stream.char()
-        if data in spaceCharacters:
-            pass
-        elif data == "\"":
-            self.currentToken["systemId"] = ""
-            self.state = self.doctypeSystemIdentifierDoubleQuotedState
-        elif data == "'":
-            self.currentToken["systemId"] = ""
-            self.state = self.doctypeSystemIdentifierSingleQuotedState
-        elif data == ">":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "unexpected-char-in-doctype"})
-            self.currentToken["correct"] = False
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "eof-in-doctype"})
-            self.currentToken["correct"] = False
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        else:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "unexpected-char-in-doctype"})
-            self.currentToken["correct"] = False
-            self.state = self.bogusDoctypeState
-        return True
-
-    def doctypeSystemIdentifierDoubleQuotedState(self):
-        data = self.stream.char()
-        if data == "\"":
-            self.state = self.afterDoctypeSystemIdentifierState
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.currentToken["systemId"] += "\uFFFD"
-        elif data == ">":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "unexpected-end-of-doctype"})
-            self.currentToken["correct"] = False
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "eof-in-doctype"})
-            self.currentToken["correct"] = False
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        else:
-            self.currentToken["systemId"] += data
-        return True
-
-    def doctypeSystemIdentifierSingleQuotedState(self):
-        data = self.stream.char()
-        if data == "'":
-            self.state = self.afterDoctypeSystemIdentifierState
-        elif data == "\u0000":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                    "data": "invalid-codepoint"})
-            self.currentToken["systemId"] += "\uFFFD"
-        elif data == ">":
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "unexpected-end-of-doctype"})
-            self.currentToken["correct"] = False
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "eof-in-doctype"})
-            self.currentToken["correct"] = False
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        else:
-            self.currentToken["systemId"] += data
-        return True
-
-    def afterDoctypeSystemIdentifierState(self):
-        data = self.stream.char()
-        if data in spaceCharacters:
-            pass
-        elif data == ">":
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        elif data is EOF:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "eof-in-doctype"})
-            self.currentToken["correct"] = False
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        else:
-            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
-                                    "unexpected-char-in-doctype"})
-            self.state = self.bogusDoctypeState
-        return True
-
-    def bogusDoctypeState(self):
-        data = self.stream.char()
-        if data == ">":
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        elif data is EOF:
-            # XXX EMIT
-            self.stream.unget(data)
-            self.tokenQueue.append(self.currentToken)
-            self.state = self.dataState
-        else:
-            pass
-        return True
-
-    def cdataSectionState(self):
-        data = []
-        while True:
-            data.append(self.stream.charsUntil("]"))
-            data.append(self.stream.charsUntil(">"))
-            char = self.stream.char()
-            if char == EOF:
-                break
-            else:
-                assert char == ">"
-                if data[-1][-2:] == "]]":
-                    data[-1] = data[-1][:-2]
-                    break
-                else:
-                    data.append(char)
-
-        data = "".join(data)  # pylint:disable=redefined-variable-type
-        # Deal with null here rather than in the parser
-        nullCount = data.count("\u0000")
-        if nullCount > 0:
-            for _ in range(nullCount):
-                self.tokenQueue.append({"type": tokenTypes["ParseError"],
-                                        "data": "invalid-codepoint"})
-            data = data.replace("\u0000", "\uFFFD")
-        if data:
-            self.tokenQueue.append({"type": tokenTypes["Characters"],
-                                    "data": data})
-        self.state = self.dataState
-        return True
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/_trie/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/_trie/__init__.py
deleted file mode 100644
index a5ba4bf..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/_trie/__init__.py
+++ /dev/null
@@ -1,14 +0,0 @@
-from __future__ import absolute_import, division, unicode_literals
-
-from .py import Trie as PyTrie
-
-Trie = PyTrie
-
-# pylint:disable=wrong-import-position
-try:
-    from .datrie import Trie as DATrie
-except ImportError:
-    pass
-else:
-    Trie = DATrie
-# pylint:enable=wrong-import-position
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/_trie/_base.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/_trie/_base.py
deleted file mode 100644
index a1158bb..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/_trie/_base.py
+++ /dev/null
@@ -1,37 +0,0 @@
-from __future__ import absolute_import, division, unicode_literals
-
-from collections import Mapping
-
-
-class Trie(Mapping):
-    """Abstract base class for tries"""
-
-    def keys(self, prefix=None):
-        # pylint:disable=arguments-differ
-        keys = super(Trie, self).keys()
-
-        if prefix is None:
-            return set(keys)
-
-        return {x for x in keys if x.startswith(prefix)}
-
-    def has_keys_with_prefix(self, prefix):
-        for key in self.keys():
-            if key.startswith(prefix):
-                return True
-
-        return False
-
-    def longest_prefix(self, prefix):
-        if prefix in self:
-            return prefix
-
-        for i in range(1, len(prefix) + 1):
-            if prefix[:-i] in self:
-                return prefix[:-i]
-
-        raise KeyError(prefix)
-
-    def longest_prefix_item(self, prefix):
-        lprefix = self.longest_prefix(prefix)
-        return (lprefix, self[lprefix])
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/_trie/datrie.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/_trie/datrie.py
deleted file mode 100644
index e2e5f86..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/_trie/datrie.py
+++ /dev/null
@@ -1,44 +0,0 @@
-from __future__ import absolute_import, division, unicode_literals
-
-from datrie import Trie as DATrie
-from pip._vendor.six import text_type
-
-from ._base import Trie as ABCTrie
-
-
-class Trie(ABCTrie):
-    def __init__(self, data):
-        chars = set()
-        for key in data.keys():
-            if not isinstance(key, text_type):
-                raise TypeError("All keys must be strings")
-            for char in key:
-                chars.add(char)
-
-        self._data = DATrie("".join(chars))
-        for key, value in data.items():
-            self._data[key] = value
-
-    def __contains__(self, key):
-        return key in self._data
-
-    def __len__(self):
-        return len(self._data)
-
-    def __iter__(self):
-        raise NotImplementedError()
-
-    def __getitem__(self, key):
-        return self._data[key]
-
-    def keys(self, prefix=None):
-        return self._data.keys(prefix)
-
-    def has_keys_with_prefix(self, prefix):
-        return self._data.has_keys_with_prefix(prefix)
-
-    def longest_prefix(self, prefix):
-        return self._data.longest_prefix(prefix)
-
-    def longest_prefix_item(self, prefix):
-        return self._data.longest_prefix_item(prefix)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/_trie/py.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/_trie/py.py
deleted file mode 100644
index c178b21..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/_trie/py.py
+++ /dev/null
@@ -1,67 +0,0 @@
-from __future__ import absolute_import, division, unicode_literals
-from pip._vendor.six import text_type
-
-from bisect import bisect_left
-
-from ._base import Trie as ABCTrie
-
-
-class Trie(ABCTrie):
-    def __init__(self, data):
-        if not all(isinstance(x, text_type) for x in data.keys()):
-            raise TypeError("All keys must be strings")
-
-        self._data = data
-        self._keys = sorted(data.keys())
-        self._cachestr = ""
-        self._cachepoints = (0, len(data))
-
-    def __contains__(self, key):
-        return key in self._data
-
-    def __len__(self):
-        return len(self._data)
-
-    def __iter__(self):
-        return iter(self._data)
-
-    def __getitem__(self, key):
-        return self._data[key]
-
-    def keys(self, prefix=None):
-        if prefix is None or prefix == "" or not self._keys:
-            return set(self._keys)
-
-        if prefix.startswith(self._cachestr):
-            lo, hi = self._cachepoints
-            start = i = bisect_left(self._keys, prefix, lo, hi)
-        else:
-            start = i = bisect_left(self._keys, prefix)
-
-        keys = set()
-        if start == len(self._keys):
-            return keys
-
-        while self._keys[i].startswith(prefix):
-            keys.add(self._keys[i])
-            i += 1
-
-        self._cachestr = prefix
-        self._cachepoints = (start, i)
-
-        return keys
-
-    def has_keys_with_prefix(self, prefix):
-        if prefix in self._data:
-            return True
-
-        if prefix.startswith(self._cachestr):
-            lo, hi = self._cachepoints
-            i = bisect_left(self._keys, prefix, lo, hi)
-        else:
-            i = bisect_left(self._keys, prefix)
-
-        if i == len(self._keys):
-            return False
-
-        return self._keys[i].startswith(prefix)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/_utils.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/_utils.py
deleted file mode 100644
index 0703afb..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/_utils.py
+++ /dev/null
@@ -1,124 +0,0 @@
-from __future__ import absolute_import, division, unicode_literals
-
-from types import ModuleType
-
-from pip._vendor.six import text_type
-
-try:
-    import xml.etree.cElementTree as default_etree
-except ImportError:
-    import xml.etree.ElementTree as default_etree
-
-
-__all__ = ["default_etree", "MethodDispatcher", "isSurrogatePair",
-           "surrogatePairToCodepoint", "moduleFactoryFactory",
-           "supports_lone_surrogates"]
-
-
-# Platforms not supporting lone surrogates (\uD800-\uDFFF) should be
-# caught by the below test. In general this would be any platform
-# using UTF-16 as its encoding of unicode strings, such as
-# Jython. This is because UTF-16 itself is based on the use of such
-# surrogates, and there is no mechanism to further escape such
-# escapes.
-try:
-    _x = eval('"\\uD800"')  # pylint:disable=eval-used
-    if not isinstance(_x, text_type):
-        # We need this with u"" because of http://bugs.jython.org/issue2039
-        _x = eval('u"\\uD800"')  # pylint:disable=eval-used
-        assert isinstance(_x, text_type)
-except:  # pylint:disable=bare-except
-    supports_lone_surrogates = False
-else:
-    supports_lone_surrogates = True
-
-
-class MethodDispatcher(dict):
-    """Dict with 2 special properties:
-
-    On initiation, keys that are lists, sets or tuples are converted to
-    multiple keys so accessing any one of the items in the original
-    list-like object returns the matching value
-
-    md = MethodDispatcher({("foo", "bar"):"baz"})
-    md["foo"] == "baz"
-
-    A default value which can be set through the default attribute.
-    """
-
-    def __init__(self, items=()):
-        # Using _dictEntries instead of directly assigning to self is about
-        # twice as fast. Please do careful performance testing before changing
-        # anything here.
-        _dictEntries = []
-        for name, value in items:
-            if isinstance(name, (list, tuple, frozenset, set)):
-                for item in name:
-                    _dictEntries.append((item, value))
-            else:
-                _dictEntries.append((name, value))
-        dict.__init__(self, _dictEntries)
-        assert len(self) == len(_dictEntries)
-        self.default = None
-
-    def __getitem__(self, key):
-        return dict.get(self, key, self.default)
-
-
-# Some utility functions to deal with weirdness around UCS2 vs UCS4
-# python builds
-
-def isSurrogatePair(data):
-    return (len(data) == 2 and
-            ord(data[0]) >= 0xD800 and ord(data[0]) <= 0xDBFF and
-            ord(data[1]) >= 0xDC00 and ord(data[1]) <= 0xDFFF)
-
-
-def surrogatePairToCodepoint(data):
-    char_val = (0x10000 + (ord(data[0]) - 0xD800) * 0x400 +
-                (ord(data[1]) - 0xDC00))
-    return char_val
-
-# Module Factory Factory (no, this isn't Java, I know)
-# Here to stop this being duplicated all over the place.
-
-
-def moduleFactoryFactory(factory):
-    moduleCache = {}
-
-    def moduleFactory(baseModule, *args, **kwargs):
-        if isinstance(ModuleType.__name__, type("")):
-            name = "_%s_factory" % baseModule.__name__
-        else:
-            name = b"_%s_factory" % baseModule.__name__
-
-        kwargs_tuple = tuple(kwargs.items())
-
-        try:
-            return moduleCache[name][args][kwargs_tuple]
-        except KeyError:
-            mod = ModuleType(name)
-            objs = factory(baseModule, *args, **kwargs)
-            mod.__dict__.update(objs)
-            if "name" not in moduleCache:
-                moduleCache[name] = {}
-            if "args" not in moduleCache[name]:
-                moduleCache[name][args] = {}
-            if "kwargs" not in moduleCache[name][args]:
-                moduleCache[name][args][kwargs_tuple] = {}
-            moduleCache[name][args][kwargs_tuple] = mod
-            return mod
-
-    return moduleFactory
-
-
-def memoize(func):
-    cache = {}
-
-    def wrapped(*args, **kwargs):
-        key = (tuple(args), tuple(kwargs.items()))
-        if key not in cache:
-            cache[key] = func(*args, **kwargs)
-        return cache[key]
-
-    return wrapped
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/constants.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/constants.py
deleted file mode 100644
index 1ff8041..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/constants.py
+++ /dev/null
@@ -1,2947 +0,0 @@
-from __future__ import absolute_import, division, unicode_literals
-
-import string
-
-EOF = None
-
-E = {
-    "null-character":
-        "Null character in input stream, replaced with U+FFFD.",
-    "invalid-codepoint":
-        "Invalid codepoint in stream.",
-    "incorrectly-placed-solidus":
-        "Solidus (/) incorrectly placed in tag.",
-    "incorrect-cr-newline-entity":
-        "Incorrect CR newline entity, replaced with LF.",
-    "illegal-windows-1252-entity":
-        "Entity used with illegal number (windows-1252 reference).",
-    "cant-convert-numeric-entity":
-        "Numeric entity couldn't be converted to character "
-        "(codepoint U+%(charAsInt)08x).",
-    "illegal-codepoint-for-numeric-entity":
-        "Numeric entity represents an illegal codepoint: "
-        "U+%(charAsInt)08x.",
-    "numeric-entity-without-semicolon":
-        "Numeric entity didn't end with ';'.",
-    "expected-numeric-entity-but-got-eof":
-        "Numeric entity expected. Got end of file instead.",
-    "expected-numeric-entity":
-        "Numeric entity expected but none found.",
-    "named-entity-without-semicolon":
-        "Named entity didn't end with ';'.",
-    "expected-named-entity":
-        "Named entity expected. Got none.",
-    "attributes-in-end-tag":
-        "End tag contains unexpected attributes.",
-    'self-closing-flag-on-end-tag':
-        "End tag contains unexpected self-closing flag.",
-    "expected-tag-name-but-got-right-bracket":
-        "Expected tag name. Got '>' instead.",
-    "expected-tag-name-but-got-question-mark":
-        "Expected tag name. Got '?' instead. (HTML doesn't "
-        "support processing instructions.)",
-    "expected-tag-name":
-        "Expected tag name. Got something else instead",
-    "expected-closing-tag-but-got-right-bracket":
-        "Expected closing tag. Got '>' instead. Ignoring '</>'.",
-    "expected-closing-tag-but-got-eof":
-        "Expected closing tag. Unexpected end of file.",
-    "expected-closing-tag-but-got-char":
-        "Expected closing tag. Unexpected character '%(data)s' found.",
-    "eof-in-tag-name":
-        "Unexpected end of file in the tag name.",
-    "expected-attribute-name-but-got-eof":
-        "Unexpected end of file. Expected attribute name instead.",
-    "eof-in-attribute-name":
-        "Unexpected end of file in attribute name.",
-    "invalid-character-in-attribute-name":
-        "Invalid character in attribute name",
-    "duplicate-attribute":
-        "Dropped duplicate attribute on tag.",
-    "expected-end-of-tag-name-but-got-eof":
-        "Unexpected end of file. Expected = or end of tag.",
-    "expected-attribute-value-but-got-eof":
-        "Unexpected end of file. Expected attribute value.",
-    "expected-attribute-value-but-got-right-bracket":
-        "Expected attribute value. Got '>' instead.",
-    'equals-in-unquoted-attribute-value':
-        "Unexpected = in unquoted attribute",
-    'unexpected-character-in-unquoted-attribute-value':
-        "Unexpected character in unquoted attribute",
-    "invalid-character-after-attribute-name":
-        "Unexpected character after attribute name.",
-    "unexpected-character-after-attribute-value":
-        "Unexpected character after attribute value.",
-    "eof-in-attribute-value-double-quote":
-        "Unexpected end of file in attribute value (\").",
-    "eof-in-attribute-value-single-quote":
-        "Unexpected end of file in attribute value (').",
-    "eof-in-attribute-value-no-quotes":
-        "Unexpected end of file in attribute value.",
-    "unexpected-EOF-after-solidus-in-tag":
-        "Unexpected end of file in tag. Expected >",
-    "unexpected-character-after-solidus-in-tag":
-        "Unexpected character after / in tag. Expected >",
-    "expected-dashes-or-doctype":
-        "Expected '--' or 'DOCTYPE'. Not found.",
-    "unexpected-bang-after-double-dash-in-comment":
-        "Unexpected ! after -- in comment",
-    "unexpected-space-after-double-dash-in-comment":
-        "Unexpected space after -- in comment",
-    "incorrect-comment":
-        "Incorrect comment.",
-    "eof-in-comment":
-        "Unexpected end of file in comment.",
-    "eof-in-comment-end-dash":
-        "Unexpected end of file in comment (-)",
-    "unexpected-dash-after-double-dash-in-comment":
-        "Unexpected '-' after '--' found in comment.",
-    "eof-in-comment-double-dash":
-        "Unexpected end of file in comment (--).",
-    "eof-in-comment-end-space-state":
-        "Unexpected end of file in comment.",
-    "eof-in-comment-end-bang-state":
-        "Unexpected end of file in comment.",
-    "unexpected-char-in-comment":
-        "Unexpected character in comment found.",
-    "need-space-after-doctype":
-        "No space after literal string 'DOCTYPE'.",
-    "expected-doctype-name-but-got-right-bracket":
-        "Unexpected > character. Expected DOCTYPE name.",
-    "expected-doctype-name-but-got-eof":
-        "Unexpected end of file. Expected DOCTYPE name.",
-    "eof-in-doctype-name":
-        "Unexpected end of file in DOCTYPE name.",
-    "eof-in-doctype":
-        "Unexpected end of file in DOCTYPE.",
-    "expected-space-or-right-bracket-in-doctype":
-        "Expected space or '>'. Got '%(data)s'",
-    "unexpected-end-of-doctype":
-        "Unexpected end of DOCTYPE.",
-    "unexpected-char-in-doctype":
-        "Unexpected character in DOCTYPE.",
-    "eof-in-innerhtml":
-        "XXX innerHTML EOF",
-    "unexpected-doctype":
-        "Unexpected DOCTYPE. Ignored.",
-    "non-html-root":
-        "html needs to be the first start tag.",
-    "expected-doctype-but-got-eof":
-        "Unexpected End of file. Expected DOCTYPE.",
-    "unknown-doctype":
-        "Erroneous DOCTYPE.",
-    "expected-doctype-but-got-chars":
-        "Unexpected non-space characters. Expected DOCTYPE.",
-    "expected-doctype-but-got-start-tag":
-        "Unexpected start tag (%(name)s). Expected DOCTYPE.",
-    "expected-doctype-but-got-end-tag":
-        "Unexpected end tag (%(name)s). Expected DOCTYPE.",
-    "end-tag-after-implied-root":
-        "Unexpected end tag (%(name)s) after the (implied) root element.",
-    "expected-named-closing-tag-but-got-eof":
-        "Unexpected end of file. Expected end tag (%(name)s).",
-    "two-heads-are-not-better-than-one":
-        "Unexpected start tag head in existing head. Ignored.",
-    "unexpected-end-tag":
-        "Unexpected end tag (%(name)s). Ignored.",
-    "unexpected-start-tag-out-of-my-head":
-        "Unexpected start tag (%(name)s) that can be in head. Moved.",
-    "unexpected-start-tag":
-        "Unexpected start tag (%(name)s).",
-    "missing-end-tag":
-        "Missing end tag (%(name)s).",
-    "missing-end-tags":
-        "Missing end tags (%(name)s).",
-    "unexpected-start-tag-implies-end-tag":
-        "Unexpected start tag (%(startName)s) "
-        "implies end tag (%(endName)s).",
-    "unexpected-start-tag-treated-as":
-        "Unexpected start tag (%(originalName)s). Treated as %(newName)s.",
-    "deprecated-tag":
-        "Unexpected start tag %(name)s. Don't use it!",
-    "unexpected-start-tag-ignored":
-        "Unexpected start tag %(name)s. Ignored.",
-    "expected-one-end-tag-but-got-another":
-        "Unexpected end tag (%(gotName)s). "
-        "Missing end tag (%(expectedName)s).",
-    "end-tag-too-early":
-        "End tag (%(name)s) seen too early. Expected other end tag.",
-    "end-tag-too-early-named":
-        "Unexpected end tag (%(gotName)s). Expected end tag (%(expectedName)s).",
-    "end-tag-too-early-ignored":
-        "End tag (%(name)s) seen too early. Ignored.",
-    "adoption-agency-1.1":
-        "End tag (%(name)s) violates step 1, "
-        "paragraph 1 of the adoption agency algorithm.",
-    "adoption-agency-1.2":
-        "End tag (%(name)s) violates step 1, "
-        "paragraph 2 of the adoption agency algorithm.",
-    "adoption-agency-1.3":
-        "End tag (%(name)s) violates step 1, "
-        "paragraph 3 of the adoption agency algorithm.",
-    "adoption-agency-4.4":
-        "End tag (%(name)s) violates step 4, "
-        "paragraph 4 of the adoption agency algorithm.",
-    "unexpected-end-tag-treated-as":
-        "Unexpected end tag (%(originalName)s). Treated as %(newName)s.",
-    "no-end-tag":
-        "This element (%(name)s) has no end tag.",
-    "unexpected-implied-end-tag-in-table":
-        "Unexpected implied end tag (%(name)s) in the table phase.",
-    "unexpected-implied-end-tag-in-table-body":
-        "Unexpected implied end tag (%(name)s) in the table body phase.",
-    "unexpected-char-implies-table-voodoo":
-        "Unexpected non-space characters in "
-        "table context caused voodoo mode.",
-    "unexpected-hidden-input-in-table":
-        "Unexpected input with type hidden in table context.",
-    "unexpected-form-in-table":
-        "Unexpected form in table context.",
-    "unexpected-start-tag-implies-table-voodoo":
-        "Unexpected start tag (%(name)s) in "
-        "table context caused voodoo mode.",
-    "unexpected-end-tag-implies-table-voodoo":
-        "Unexpected end tag (%(name)s) in "
-        "table context caused voodoo mode.",
-    "unexpected-cell-in-table-body":
-        "Unexpected table cell start tag (%(name)s) "
-        "in the table body phase.",
-    "unexpected-cell-end-tag":
-        "Got table cell end tag (%(name)s) "
-        "while required end tags are missing.",
-    "unexpected-end-tag-in-table-body":
-        "Unexpected end tag (%(name)s) in the table body phase. Ignored.",
-    "unexpected-implied-end-tag-in-table-row":
-        "Unexpected implied end tag (%(name)s) in the table row phase.",
-    "unexpected-end-tag-in-table-row":
-        "Unexpected end tag (%(name)s) in the table row phase. Ignored.",
-    "unexpected-select-in-select":
-        "Unexpected select start tag in the select phase "
-        "treated as select end tag.",
-    "unexpected-input-in-select":
-        "Unexpected input start tag in the select phase.",
-    "unexpected-start-tag-in-select":
-        "Unexpected start tag token (%(name)s in the select phase. "
-        "Ignored.",
-    "unexpected-end-tag-in-select":
-        "Unexpected end tag (%(name)s) in the select phase. Ignored.",
-    "unexpected-table-element-start-tag-in-select-in-table":
-        "Unexpected table element start tag (%(name)s) in the select in table phase.",
-    "unexpected-table-element-end-tag-in-select-in-table":
-        "Unexpected table element end tag (%(name)s) in the select in table phase.",
-    "unexpected-char-after-body":
-        "Unexpected non-space characters in the after body phase.",
-    "unexpected-start-tag-after-body":
-        "Unexpected start tag token (%(name)s)"
-        " in the after body phase.",
-    "unexpected-end-tag-after-body":
-        "Unexpected end tag token (%(name)s)"
-        " in the after body phase.",
-    "unexpected-char-in-frameset":
-        "Unexpected characters in the frameset phase. Characters ignored.",
-    "unexpected-start-tag-in-frameset":
-        "Unexpected start tag token (%(name)s)"
-        " in the frameset phase. Ignored.",
-    "unexpected-frameset-in-frameset-innerhtml":
-        "Unexpected end tag token (frameset) "
-        "in the frameset phase (innerHTML).",
-    "unexpected-end-tag-in-frameset":
-        "Unexpected end tag token (%(name)s)"
-        " in the frameset phase. Ignored.",
-    "unexpected-char-after-frameset":
-        "Unexpected non-space characters in the "
-        "after frameset phase. Ignored.",
-    "unexpected-start-tag-after-frameset":
-        "Unexpected start tag (%(name)s)"
-        " in the after frameset phase. Ignored.",
-    "unexpected-end-tag-after-frameset":
-        "Unexpected end tag (%(name)s)"
-        " in the after frameset phase. Ignored.",
-    "unexpected-end-tag-after-body-innerhtml":
-        "Unexpected end tag after body(innerHtml)",
-    "expected-eof-but-got-char":
-        "Unexpected non-space characters. Expected end of file.",
-    "expected-eof-but-got-start-tag":
-        "Unexpected start tag (%(name)s)"
-        ". Expected end of file.",
-    "expected-eof-but-got-end-tag":
-        "Unexpected end tag (%(name)s)"
-        ". Expected end of file.",
-    "eof-in-table":
-        "Unexpected end of file. Expected table content.",
-    "eof-in-select":
-        "Unexpected end of file. Expected select content.",
-    "eof-in-frameset":
-        "Unexpected end of file. Expected frameset content.",
-    "eof-in-script-in-script":
-        "Unexpected end of file. Expected script content.",
-    "eof-in-foreign-lands":
-        "Unexpected end of file. Expected foreign content",
-    "non-void-element-with-trailing-solidus":
-        "Trailing solidus not allowed on element %(name)s",
-    "unexpected-html-element-in-foreign-content":
-        "Element %(name)s not allowed in a non-html context",
-    "unexpected-end-tag-before-html":
-        "Unexpected end tag (%(name)s) before html.",
-    "unexpected-inhead-noscript-tag":
-        "Element %(name)s not allowed in a inhead-noscript context",
-    "eof-in-head-noscript":
-        "Unexpected end of file. Expected inhead-noscript content",
-    "char-in-head-noscript":
-        "Unexpected non-space character. Expected inhead-noscript content",
-    "XXX-undefined-error":
-        "Undefined error (this sucks and should be fixed)",
-}
-
-namespaces = {
-    "html": "http://www.w3.org/1999/xhtml",
-    "mathml": "http://www.w3.org/1998/Math/MathML",
-    "svg": "http://www.w3.org/2000/svg",
-    "xlink": "http://www.w3.org/1999/xlink",
-    "xml": "http://www.w3.org/XML/1998/namespace",
-    "xmlns": "http://www.w3.org/2000/xmlns/"
-}
-
-scopingElements = frozenset([
-    (namespaces["html"], "applet"),
-    (namespaces["html"], "caption"),
-    (namespaces["html"], "html"),
-    (namespaces["html"], "marquee"),
-    (namespaces["html"], "object"),
-    (namespaces["html"], "table"),
-    (namespaces["html"], "td"),
-    (namespaces["html"], "th"),
-    (namespaces["mathml"], "mi"),
-    (namespaces["mathml"], "mo"),
-    (namespaces["mathml"], "mn"),
-    (namespaces["mathml"], "ms"),
-    (namespaces["mathml"], "mtext"),
-    (namespaces["mathml"], "annotation-xml"),
-    (namespaces["svg"], "foreignObject"),
-    (namespaces["svg"], "desc"),
-    (namespaces["svg"], "title"),
-])
-
-formattingElements = frozenset([
-    (namespaces["html"], "a"),
-    (namespaces["html"], "b"),
-    (namespaces["html"], "big"),
-    (namespaces["html"], "code"),
-    (namespaces["html"], "em"),
-    (namespaces["html"], "font"),
-    (namespaces["html"], "i"),
-    (namespaces["html"], "nobr"),
-    (namespaces["html"], "s"),
-    (namespaces["html"], "small"),
-    (namespaces["html"], "strike"),
-    (namespaces["html"], "strong"),
-    (namespaces["html"], "tt"),
-    (namespaces["html"], "u")
-])
-
-specialElements = frozenset([
-    (namespaces["html"], "address"),
-    (namespaces["html"], "applet"),
-    (namespaces["html"], "area"),
-    (namespaces["html"], "article"),
-    (namespaces["html"], "aside"),
-    (namespaces["html"], "base"),
-    (namespaces["html"], "basefont"),
-    (namespaces["html"], "bgsound"),
-    (namespaces["html"], "blockquote"),
-    (namespaces["html"], "body"),
-    (namespaces["html"], "br"),
-    (namespaces["html"], "button"),
-    (namespaces["html"], "caption"),
-    (namespaces["html"], "center"),
-    (namespaces["html"], "col"),
-    (namespaces["html"], "colgroup"),
-    (namespaces["html"], "command"),
-    (namespaces["html"], "dd"),
-    (namespaces["html"], "details"),
-    (namespaces["html"], "dir"),
-    (namespaces["html"], "div"),
-    (namespaces["html"], "dl"),
-    (namespaces["html"], "dt"),
-    (namespaces["html"], "embed"),
-    (namespaces["html"], "fieldset"),
-    (namespaces["html"], "figure"),
-    (namespaces["html"], "footer"),
-    (namespaces["html"], "form"),
-    (namespaces["html"], "frame"),
-    (namespaces["html"], "frameset"),
-    (namespaces["html"], "h1"),
-    (namespaces["html"], "h2"),
-    (namespaces["html"], "h3"),
-    (namespaces["html"], "h4"),
-    (namespaces["html"], "h5"),
-    (namespaces["html"], "h6"),
-    (namespaces["html"], "head"),
-    (namespaces["html"], "header"),
-    (namespaces["html"], "hr"),
-    (namespaces["html"], "html"),
-    (namespaces["html"], "iframe"),
-    # Note that image is commented out in the spec as "this isn't an
-    # element that can end up on the stack, so it doesn't matter,"
-    (namespaces["html"], "image"),
-    (namespaces["html"], "img"),
-    (namespaces["html"], "input"),
-    (namespaces["html"], "isindex"),
-    (namespaces["html"], "li"),
-    (namespaces["html"], "link"),
-    (namespaces["html"], "listing"),
-    (namespaces["html"], "marquee"),
-    (namespaces["html"], "menu"),
-    (namespaces["html"], "meta"),
-    (namespaces["html"], "nav"),
-    (namespaces["html"], "noembed"),
-    (namespaces["html"], "noframes"),
-    (namespaces["html"], "noscript"),
-    (namespaces["html"], "object"),
-    (namespaces["html"], "ol"),
-    (namespaces["html"], "p"),
-    (namespaces["html"], "param"),
-    (namespaces["html"], "plaintext"),
-    (namespaces["html"], "pre"),
-    (namespaces["html"], "script"),
-    (namespaces["html"], "section"),
-    (namespaces["html"], "select"),
-    (namespaces["html"], "style"),
-    (namespaces["html"], "table"),
-    (namespaces["html"], "tbody"),
-    (namespaces["html"], "td"),
-    (namespaces["html"], "textarea"),
-    (namespaces["html"], "tfoot"),
-    (namespaces["html"], "th"),
-    (namespaces["html"], "thead"),
-    (namespaces["html"], "title"),
-    (namespaces["html"], "tr"),
-    (namespaces["html"], "ul"),
-    (namespaces["html"], "wbr"),
-    (namespaces["html"], "xmp"),
-    (namespaces["svg"], "foreignObject")
-])
-
-htmlIntegrationPointElements = frozenset([
-    (namespaces["mathml"], "annotation-xml"),
-    (namespaces["svg"], "foreignObject"),
-    (namespaces["svg"], "desc"),
-    (namespaces["svg"], "title")
-])
-
-mathmlTextIntegrationPointElements = frozenset([
-    (namespaces["mathml"], "mi"),
-    (namespaces["mathml"], "mo"),
-    (namespaces["mathml"], "mn"),
-    (namespaces["mathml"], "ms"),
-    (namespaces["mathml"], "mtext")
-])
-
-adjustSVGAttributes = {
-    "attributename": "attributeName",
-    "attributetype": "attributeType",
-    "basefrequency": "baseFrequency",
-    "baseprofile": "baseProfile",
-    "calcmode": "calcMode",
-    "clippathunits": "clipPathUnits",
-    "contentscripttype": "contentScriptType",
-    "contentstyletype": "contentStyleType",
-    "diffuseconstant": "diffuseConstant",
-    "edgemode": "edgeMode",
-    "externalresourcesrequired": "externalResourcesRequired",
-    "filterres": "filterRes",
-    "filterunits": "filterUnits",
-    "glyphref": "glyphRef",
-    "gradienttransform": "gradientTransform",
-    "gradientunits": "gradientUnits",
-    "kernelmatrix": "kernelMatrix",
-    "kernelunitlength": "kernelUnitLength",
-    "keypoints": "keyPoints",
-    "keysplines": "keySplines",
-    "keytimes": "keyTimes",
-    "lengthadjust": "lengthAdjust",
-    "limitingconeangle": "limitingConeAngle",
-    "markerheight": "markerHeight",
-    "markerunits": "markerUnits",
-    "markerwidth": "markerWidth",
-    "maskcontentunits": "maskContentUnits",
-    "maskunits": "maskUnits",
-    "numoctaves": "numOctaves",
-    "pathlength": "pathLength",
-    "patterncontentunits": "patternContentUnits",
-    "patterntransform": "patternTransform",
-    "patternunits": "patternUnits",
-    "pointsatx": "pointsAtX",
-    "pointsaty": "pointsAtY",
-    "pointsatz": "pointsAtZ",
-    "preservealpha": "preserveAlpha",
-    "preserveaspectratio": "preserveAspectRatio",
-    "primitiveunits": "primitiveUnits",
-    "refx": "refX",
-    "refy": "refY",
-    "repeatcount": "repeatCount",
-    "repeatdur": "repeatDur",
-    "requiredextensions": "requiredExtensions",
-    "requiredfeatures": "requiredFeatures",
-    "specularconstant": "specularConstant",
-    "specularexponent": "specularExponent",
-    "spreadmethod": "spreadMethod",
-    "startoffset": "startOffset",
-    "stddeviation": "stdDeviation",
-    "stitchtiles": "stitchTiles",
-    "surfacescale": "surfaceScale",
-    "systemlanguage": "systemLanguage",
-    "tablevalues": "tableValues",
-    "targetx": "targetX",
-    "targety": "targetY",
-    "textlength": "textLength",
-    "viewbox": "viewBox",
-    "viewtarget": "viewTarget",
-    "xchannelselector": "xChannelSelector",
-    "ychannelselector": "yChannelSelector",
-    "zoomandpan": "zoomAndPan"
-}
-
-adjustMathMLAttributes = {"definitionurl": "definitionURL"}
-
-adjustForeignAttributes = {
-    "xlink:actuate": ("xlink", "actuate", namespaces["xlink"]),
-    "xlink:arcrole": ("xlink", "arcrole", namespaces["xlink"]),
-    "xlink:href": ("xlink", "href", namespaces["xlink"]),
-    "xlink:role": ("xlink", "role", namespaces["xlink"]),
-    "xlink:show": ("xlink", "show", namespaces["xlink"]),
-    "xlink:title": ("xlink", "title", namespaces["xlink"]),
-    "xlink:type": ("xlink", "type", namespaces["xlink"]),
-    "xml:base": ("xml", "base", namespaces["xml"]),
-    "xml:lang": ("xml", "lang", namespaces["xml"]),
-    "xml:space": ("xml", "space", namespaces["xml"]),
-    "xmlns": (None, "xmlns", namespaces["xmlns"]),
-    "xmlns:xlink": ("xmlns", "xlink", namespaces["xmlns"])
-}
-
-unadjustForeignAttributes = dict([((ns, local), qname) for qname, (prefix, local, ns) in
-                                  adjustForeignAttributes.items()])
-
-spaceCharacters = frozenset([
-    "\t",
-    "\n",
-    "\u000C",
-    " ",
-    "\r"
-])
-
-tableInsertModeElements = frozenset([
-    "table",
-    "tbody",
-    "tfoot",
-    "thead",
-    "tr"
-])
-
-asciiLowercase = frozenset(string.ascii_lowercase)
-asciiUppercase = frozenset(string.ascii_uppercase)
-asciiLetters = frozenset(string.ascii_letters)
-digits = frozenset(string.digits)
-hexDigits = frozenset(string.hexdigits)
-
-asciiUpper2Lower = dict([(ord(c), ord(c.lower()))
-                         for c in string.ascii_uppercase])
-
-# Heading elements need to be ordered
-headingElements = (
-    "h1",
-    "h2",
-    "h3",
-    "h4",
-    "h5",
-    "h6"
-)
-
-voidElements = frozenset([
-    "base",
-    "command",
-    "event-source",
-    "link",
-    "meta",
-    "hr",
-    "br",
-    "img",
-    "embed",
-    "param",
-    "area",
-    "col",
-    "input",
-    "source",
-    "track"
-])
-
-cdataElements = frozenset(['title', 'textarea'])
-
-rcdataElements = frozenset([
-    'style',
-    'script',
-    'xmp',
-    'iframe',
-    'noembed',
-    'noframes',
-    'noscript'
-])
-
-booleanAttributes = {
-    "": frozenset(["irrelevant", "itemscope"]),
-    "style": frozenset(["scoped"]),
-    "img": frozenset(["ismap"]),
-    "audio": frozenset(["autoplay", "controls"]),
-    "video": frozenset(["autoplay", "controls"]),
-    "script": frozenset(["defer", "async"]),
-    "details": frozenset(["open"]),
-    "datagrid": frozenset(["multiple", "disabled"]),
-    "command": frozenset(["hidden", "disabled", "checked", "default"]),
-    "hr": frozenset(["noshade"]),
-    "menu": frozenset(["autosubmit"]),
-    "fieldset": frozenset(["disabled", "readonly"]),
-    "option": frozenset(["disabled", "readonly", "selected"]),
-    "optgroup": frozenset(["disabled", "readonly"]),
-    "button": frozenset(["disabled", "autofocus"]),
-    "input": frozenset(["disabled", "readonly", "required", "autofocus", "checked", "ismap"]),
-    "select": frozenset(["disabled", "readonly", "autofocus", "multiple"]),
-    "output": frozenset(["disabled", "readonly"]),
-    "iframe": frozenset(["seamless"]),
-}
-
-# entitiesWindows1252 has to be _ordered_ and needs to have an index. It
-# therefore can't be a frozenset.
-entitiesWindows1252 = (
-    8364,   # 0x80  0x20AC  EURO SIGN
-    65533,  # 0x81          UNDEFINED
-    8218,   # 0x82  0x201A  SINGLE LOW-9 QUOTATION MARK
-    402,    # 0x83  0x0192  LATIN SMALL LETTER F WITH HOOK
-    8222,   # 0x84  0x201E  DOUBLE LOW-9 QUOTATION MARK
-    8230,   # 0x85  0x2026  HORIZONTAL ELLIPSIS
-    8224,   # 0x86  0x2020  DAGGER
-    8225,   # 0x87  0x2021  DOUBLE DAGGER
-    710,    # 0x88  0x02C6  MODIFIER LETTER CIRCUMFLEX ACCENT
-    8240,   # 0x89  0x2030  PER MILLE SIGN
-    352,    # 0x8A  0x0160  LATIN CAPITAL LETTER S WITH CARON
-    8249,   # 0x8B  0x2039  SINGLE LEFT-POINTING ANGLE QUOTATION MARK
-    338,    # 0x8C  0x0152  LATIN CAPITAL LIGATURE OE
-    65533,  # 0x8D          UNDEFINED
-    381,    # 0x8E  0x017D  LATIN CAPITAL LETTER Z WITH CARON
-    65533,  # 0x8F          UNDEFINED
-    65533,  # 0x90          UNDEFINED
-    8216,   # 0x91  0x2018  LEFT SINGLE QUOTATION MARK
-    8217,   # 0x92  0x2019  RIGHT SINGLE QUOTATION MARK
-    8220,   # 0x93  0x201C  LEFT DOUBLE QUOTATION MARK
-    8221,   # 0x94  0x201D  RIGHT DOUBLE QUOTATION MARK
-    8226,   # 0x95  0x2022  BULLET
-    8211,   # 0x96  0x2013  EN DASH
-    8212,   # 0x97  0x2014  EM DASH
-    732,    # 0x98  0x02DC  SMALL TILDE
-    8482,   # 0x99  0x2122  TRADE MARK SIGN
-    353,    # 0x9A  0x0161  LATIN SMALL LETTER S WITH CARON
-    8250,   # 0x9B  0x203A  SINGLE RIGHT-POINTING ANGLE QUOTATION MARK
-    339,    # 0x9C  0x0153  LATIN SMALL LIGATURE OE
-    65533,  # 0x9D          UNDEFINED
-    382,    # 0x9E  0x017E  LATIN SMALL LETTER Z WITH CARON
-    376     # 0x9F  0x0178  LATIN CAPITAL LETTER Y WITH DIAERESIS
-)
-
-xmlEntities = frozenset(['lt;', 'gt;', 'amp;', 'apos;', 'quot;'])
-
-entities = {
-    "AElig": "\xc6",
-    "AElig;": "\xc6",
-    "AMP": "&",
-    "AMP;": "&",
-    "Aacute": "\xc1",
-    "Aacute;": "\xc1",
-    "Abreve;": "\u0102",
-    "Acirc": "\xc2",
-    "Acirc;": "\xc2",
-    "Acy;": "\u0410",
-    "Afr;": "\U0001d504",
-    "Agrave": "\xc0",
-    "Agrave;": "\xc0",
-    "Alpha;": "\u0391",
-    "Amacr;": "\u0100",
-    "And;": "\u2a53",
-    "Aogon;": "\u0104",
-    "Aopf;": "\U0001d538",
-    "ApplyFunction;": "\u2061",
-    "Aring": "\xc5",
-    "Aring;": "\xc5",
-    "Ascr;": "\U0001d49c",
-    "Assign;": "\u2254",
-    "Atilde": "\xc3",
-    "Atilde;": "\xc3",
-    "Auml": "\xc4",
-    "Auml;": "\xc4",
-    "Backslash;": "\u2216",
-    "Barv;": "\u2ae7",
-    "Barwed;": "\u2306",
-    "Bcy;": "\u0411",
-    "Because;": "\u2235",
-    "Bernoullis;": "\u212c",
-    "Beta;": "\u0392",
-    "Bfr;": "\U0001d505",
-    "Bopf;": "\U0001d539",
-    "Breve;": "\u02d8",
-    "Bscr;": "\u212c",
-    "Bumpeq;": "\u224e",
-    "CHcy;": "\u0427",
-    "COPY": "\xa9",
-    "COPY;": "\xa9",
-    "Cacute;": "\u0106",
-    "Cap;": "\u22d2",
-    "CapitalDifferentialD;": "\u2145",
-    "Cayleys;": "\u212d",
-    "Ccaron;": "\u010c",
-    "Ccedil": "\xc7",
-    "Ccedil;": "\xc7",
-    "Ccirc;": "\u0108",
-    "Cconint;": "\u2230",
-    "Cdot;": "\u010a",
-    "Cedilla;": "\xb8",
-    "CenterDot;": "\xb7",
-    "Cfr;": "\u212d",
-    "Chi;": "\u03a7",
-    "CircleDot;": "\u2299",
-    "CircleMinus;": "\u2296",
-    "CirclePlus;": "\u2295",
-    "CircleTimes;": "\u2297",
-    "ClockwiseContourIntegral;": "\u2232",
-    "CloseCurlyDoubleQuote;": "\u201d",
-    "CloseCurlyQuote;": "\u2019",
-    "Colon;": "\u2237",
-    "Colone;": "\u2a74",
-    "Congruent;": "\u2261",
-    "Conint;": "\u222f",
-    "ContourIntegral;": "\u222e",
-    "Copf;": "\u2102",
-    "Coproduct;": "\u2210",
-    "CounterClockwiseContourIntegral;": "\u2233",
-    "Cross;": "\u2a2f",
-    "Cscr;": "\U0001d49e",
-    "Cup;": "\u22d3",
-    "CupCap;": "\u224d",
-    "DD;": "\u2145",
-    "DDotrahd;": "\u2911",
-    "DJcy;": "\u0402",
-    "DScy;": "\u0405",
-    "DZcy;": "\u040f",
-    "Dagger;": "\u2021",
-    "Darr;": "\u21a1",
-    "Dashv;": "\u2ae4",
-    "Dcaron;": "\u010e",
-    "Dcy;": "\u0414",
-    "Del;": "\u2207",
-    "Delta;": "\u0394",
-    "Dfr;": "\U0001d507",
-    "DiacriticalAcute;": "\xb4",
-    "DiacriticalDot;": "\u02d9",
-    "DiacriticalDoubleAcute;": "\u02dd",
-    "DiacriticalGrave;": "`",
-    "DiacriticalTilde;": "\u02dc",
-    "Diamond;": "\u22c4",
-    "DifferentialD;": "\u2146",
-    "Dopf;": "\U0001d53b",
-    "Dot;": "\xa8",
-    "DotDot;": "\u20dc",
-    "DotEqual;": "\u2250",
-    "DoubleContourIntegral;": "\u222f",
-    "DoubleDot;": "\xa8",
-    "DoubleDownArrow;": "\u21d3",
-    "DoubleLeftArrow;": "\u21d0",
-    "DoubleLeftRightArrow;": "\u21d4",
-    "DoubleLeftTee;": "\u2ae4",
-    "DoubleLongLeftArrow;": "\u27f8",
-    "DoubleLongLeftRightArrow;": "\u27fa",
-    "DoubleLongRightArrow;": "\u27f9",
-    "DoubleRightArrow;": "\u21d2",
-    "DoubleRightTee;": "\u22a8",
-    "DoubleUpArrow;": "\u21d1",
-    "DoubleUpDownArrow;": "\u21d5",
-    "DoubleVerticalBar;": "\u2225",
-    "DownArrow;": "\u2193",
-    "DownArrowBar;": "\u2913",
-    "DownArrowUpArrow;": "\u21f5",
-    "DownBreve;": "\u0311",
-    "DownLeftRightVector;": "\u2950",
-    "DownLeftTeeVector;": "\u295e",
-    "DownLeftVector;": "\u21bd",
-    "DownLeftVectorBar;": "\u2956",
-    "DownRightTeeVector;": "\u295f",
-    "DownRightVector;": "\u21c1",
-    "DownRightVectorBar;": "\u2957",
-    "DownTee;": "\u22a4",
-    "DownTeeArrow;": "\u21a7",
-    "Downarrow;": "\u21d3",
-    "Dscr;": "\U0001d49f",
-    "Dstrok;": "\u0110",
-    "ENG;": "\u014a",
-    "ETH": "\xd0",
-    "ETH;": "\xd0",
-    "Eacute": "\xc9",
-    "Eacute;": "\xc9",
-    "Ecaron;": "\u011a",
-    "Ecirc": "\xca",
-    "Ecirc;": "\xca",
-    "Ecy;": "\u042d",
-    "Edot;": "\u0116",
-    "Efr;": "\U0001d508",
-    "Egrave": "\xc8",
-    "Egrave;": "\xc8",
-    "Element;": "\u2208",
-    "Emacr;": "\u0112",
-    "EmptySmallSquare;": "\u25fb",
-    "EmptyVerySmallSquare;": "\u25ab",
-    "Eogon;": "\u0118",
-    "Eopf;": "\U0001d53c",
-    "Epsilon;": "\u0395",
-    "Equal;": "\u2a75",
-    "EqualTilde;": "\u2242",
-    "Equilibrium;": "\u21cc",
-    "Escr;": "\u2130",
-    "Esim;": "\u2a73",
-    "Eta;": "\u0397",
-    "Euml": "\xcb",
-    "Euml;": "\xcb",
-    "Exists;": "\u2203",
-    "ExponentialE;": "\u2147",
-    "Fcy;": "\u0424",
-    "Ffr;": "\U0001d509",
-    "FilledSmallSquare;": "\u25fc",
-    "FilledVerySmallSquare;": "\u25aa",
-    "Fopf;": "\U0001d53d",
-    "ForAll;": "\u2200",
-    "Fouriertrf;": "\u2131",
-    "Fscr;": "\u2131",
-    "GJcy;": "\u0403",
-    "GT": ">",
-    "GT;": ">",
-    "Gamma;": "\u0393",
-    "Gammad;": "\u03dc",
-    "Gbreve;": "\u011e",
-    "Gcedil;": "\u0122",
-    "Gcirc;": "\u011c",
-    "Gcy;": "\u0413",
-    "Gdot;": "\u0120",
-    "Gfr;": "\U0001d50a",
-    "Gg;": "\u22d9",
-    "Gopf;": "\U0001d53e",
-    "GreaterEqual;": "\u2265",
-    "GreaterEqualLess;": "\u22db",
-    "GreaterFullEqual;": "\u2267",
-    "GreaterGreater;": "\u2aa2",
-    "GreaterLess;": "\u2277",
-    "GreaterSlantEqual;": "\u2a7e",
-    "GreaterTilde;": "\u2273",
-    "Gscr;": "\U0001d4a2",
-    "Gt;": "\u226b",
-    "HARDcy;": "\u042a",
-    "Hacek;": "\u02c7",
-    "Hat;": "^",
-    "Hcirc;": "\u0124",
-    "Hfr;": "\u210c",
-    "HilbertSpace;": "\u210b",
-    "Hopf;": "\u210d",
-    "HorizontalLine;": "\u2500",
-    "Hscr;": "\u210b",
-    "Hstrok;": "\u0126",
-    "HumpDownHump;": "\u224e",
-    "HumpEqual;": "\u224f",
-    "IEcy;": "\u0415",
-    "IJlig;": "\u0132",
-    "IOcy;": "\u0401",
-    "Iacute": "\xcd",
-    "Iacute;": "\xcd",
-    "Icirc": "\xce",
-    "Icirc;": "\xce",
-    "Icy;": "\u0418",
-    "Idot;": "\u0130",
-    "Ifr;": "\u2111",
-    "Igrave": "\xcc",
-    "Igrave;": "\xcc",
-    "Im;": "\u2111",
-    "Imacr;": "\u012a",
-    "ImaginaryI;": "\u2148",
-    "Implies;": "\u21d2",
-    "Int;": "\u222c",
-    "Integral;": "\u222b",
-    "Intersection;": "\u22c2",
-    "InvisibleComma;": "\u2063",
-    "InvisibleTimes;": "\u2062",
-    "Iogon;": "\u012e",
-    "Iopf;": "\U0001d540",
-    "Iota;": "\u0399",
-    "Iscr;": "\u2110",
-    "Itilde;": "\u0128",
-    "Iukcy;": "\u0406",
-    "Iuml": "\xcf",
-    "Iuml;": "\xcf",
-    "Jcirc;": "\u0134",
-    "Jcy;": "\u0419",
-    "Jfr;": "\U0001d50d",
-    "Jopf;": "\U0001d541",
-    "Jscr;": "\U0001d4a5",
-    "Jsercy;": "\u0408",
-    "Jukcy;": "\u0404",
-    "KHcy;": "\u0425",
-    "KJcy;": "\u040c",
-    "Kappa;": "\u039a",
-    "Kcedil;": "\u0136",
-    "Kcy;": "\u041a",
-    "Kfr;": "\U0001d50e",
-    "Kopf;": "\U0001d542",
-    "Kscr;": "\U0001d4a6",
-    "LJcy;": "\u0409",
-    "LT": "<",
-    "LT;": "<",
-    "Lacute;": "\u0139",
-    "Lambda;": "\u039b",
-    "Lang;": "\u27ea",
-    "Laplacetrf;": "\u2112",
-    "Larr;": "\u219e",
-    "Lcaron;": "\u013d",
-    "Lcedil;": "\u013b",
-    "Lcy;": "\u041b",
-    "LeftAngleBracket;": "\u27e8",
-    "LeftArrow;": "\u2190",
-    "LeftArrowBar;": "\u21e4",
-    "LeftArrowRightArrow;": "\u21c6",
-    "LeftCeiling;": "\u2308",
-    "LeftDoubleBracket;": "\u27e6",
-    "LeftDownTeeVector;": "\u2961",
-    "LeftDownVector;": "\u21c3",
-    "LeftDownVectorBar;": "\u2959",
-    "LeftFloor;": "\u230a",
-    "LeftRightArrow;": "\u2194",
-    "LeftRightVector;": "\u294e",
-    "LeftTee;": "\u22a3",
-    "LeftTeeArrow;": "\u21a4",
-    "LeftTeeVector;": "\u295a",
-    "LeftTriangle;": "\u22b2",
-    "LeftTriangleBar;": "\u29cf",
-    "LeftTriangleEqual;": "\u22b4",
-    "LeftUpDownVector;": "\u2951",
-    "LeftUpTeeVector;": "\u2960",
-    "LeftUpVector;": "\u21bf",
-    "LeftUpVectorBar;": "\u2958",
-    "LeftVector;": "\u21bc",
-    "LeftVectorBar;": "\u2952",
-    "Leftarrow;": "\u21d0",
-    "Leftrightarrow;": "\u21d4",
-    "LessEqualGreater;": "\u22da",
-    "LessFullEqual;": "\u2266",
-    "LessGreater;": "\u2276",
-    "LessLess;": "\u2aa1",
-    "LessSlantEqual;": "\u2a7d",
-    "LessTilde;": "\u2272",
-    "Lfr;": "\U0001d50f",
-    "Ll;": "\u22d8",
-    "Lleftarrow;": "\u21da",
-    "Lmidot;": "\u013f",
-    "LongLeftArrow;": "\u27f5",
-    "LongLeftRightArrow;": "\u27f7",
-    "LongRightArrow;": "\u27f6",
-    "Longleftarrow;": "\u27f8",
-    "Longleftrightarrow;": "\u27fa",
-    "Longrightarrow;": "\u27f9",
-    "Lopf;": "\U0001d543",
-    "LowerLeftArrow;": "\u2199",
-    "LowerRightArrow;": "\u2198",
-    "Lscr;": "\u2112",
-    "Lsh;": "\u21b0",
-    "Lstrok;": "\u0141",
-    "Lt;": "\u226a",
-    "Map;": "\u2905",
-    "Mcy;": "\u041c",
-    "MediumSpace;": "\u205f",
-    "Mellintrf;": "\u2133",
-    "Mfr;": "\U0001d510",
-    "MinusPlus;": "\u2213",
-    "Mopf;": "\U0001d544",
-    "Mscr;": "\u2133",
-    "Mu;": "\u039c",
-    "NJcy;": "\u040a",
-    "Nacute;": "\u0143",
-    "Ncaron;": "\u0147",
-    "Ncedil;": "\u0145",
-    "Ncy;": "\u041d",
-    "NegativeMediumSpace;": "\u200b",
-    "NegativeThickSpace;": "\u200b",
-    "NegativeThinSpace;": "\u200b",
-    "NegativeVeryThinSpace;": "\u200b",
-    "NestedGreaterGreater;": "\u226b",
-    "NestedLessLess;": "\u226a",
-    "NewLine;": "\n",
-    "Nfr;": "\U0001d511",
-    "NoBreak;": "\u2060",
-    "NonBreakingSpace;": "\xa0",
-    "Nopf;": "\u2115",
-    "Not;": "\u2aec",
-    "NotCongruent;": "\u2262",
-    "NotCupCap;": "\u226d",
-    "NotDoubleVerticalBar;": "\u2226",
-    "NotElement;": "\u2209",
-    "NotEqual;": "\u2260",
-    "NotEqualTilde;": "\u2242\u0338",
-    "NotExists;": "\u2204",
-    "NotGreater;": "\u226f",
-    "NotGreaterEqual;": "\u2271",
-    "NotGreaterFullEqual;": "\u2267\u0338",
-    "NotGreaterGreater;": "\u226b\u0338",
-    "NotGreaterLess;": "\u2279",
-    "NotGreaterSlantEqual;": "\u2a7e\u0338",
-    "NotGreaterTilde;": "\u2275",
-    "NotHumpDownHump;": "\u224e\u0338",
-    "NotHumpEqual;": "\u224f\u0338",
-    "NotLeftTriangle;": "\u22ea",
-    "NotLeftTriangleBar;": "\u29cf\u0338",
-    "NotLeftTriangleEqual;": "\u22ec",
-    "NotLess;": "\u226e",
-    "NotLessEqual;": "\u2270",
-    "NotLessGreater;": "\u2278",
-    "NotLessLess;": "\u226a\u0338",
-    "NotLessSlantEqual;": "\u2a7d\u0338",
-    "NotLessTilde;": "\u2274",
-    "NotNestedGreaterGreater;": "\u2aa2\u0338",
-    "NotNestedLessLess;": "\u2aa1\u0338",
-    "NotPrecedes;": "\u2280",
-    "NotPrecedesEqual;": "\u2aaf\u0338",
-    "NotPrecedesSlantEqual;": "\u22e0",
-    "NotReverseElement;": "\u220c",
-    "NotRightTriangle;": "\u22eb",
-    "NotRightTriangleBar;": "\u29d0\u0338",
-    "NotRightTriangleEqual;": "\u22ed",
-    "NotSquareSubset;": "\u228f\u0338",
-    "NotSquareSubsetEqual;": "\u22e2",
-    "NotSquareSuperset;": "\u2290\u0338",
-    "NotSquareSupersetEqual;": "\u22e3",
-    "NotSubset;": "\u2282\u20d2",
-    "NotSubsetEqual;": "\u2288",
-    "NotSucceeds;": "\u2281",
-    "NotSucceedsEqual;": "\u2ab0\u0338",
-    "NotSucceedsSlantEqual;": "\u22e1",
-    "NotSucceedsTilde;": "\u227f\u0338",
-    "NotSuperset;": "\u2283\u20d2",
-    "NotSupersetEqual;": "\u2289",
-    "NotTilde;": "\u2241",
-    "NotTildeEqual;": "\u2244",
-    "NotTildeFullEqual;": "\u2247",
-    "NotTildeTilde;": "\u2249",
-    "NotVerticalBar;": "\u2224",
-    "Nscr;": "\U0001d4a9",
-    "Ntilde": "\xd1",
-    "Ntilde;": "\xd1",
-    "Nu;": "\u039d",
-    "OElig;": "\u0152",
-    "Oacute": "\xd3",
-    "Oacute;": "\xd3",
-    "Ocirc": "\xd4",
-    "Ocirc;": "\xd4",
-    "Ocy;": "\u041e",
-    "Odblac;": "\u0150",
-    "Ofr;": "\U0001d512",
-    "Ograve": "\xd2",
-    "Ograve;": "\xd2",
-    "Omacr;": "\u014c",
-    "Omega;": "\u03a9",
-    "Omicron;": "\u039f",
-    "Oopf;": "\U0001d546",
-    "OpenCurlyDoubleQuote;": "\u201c",
-    "OpenCurlyQuote;": "\u2018",
-    "Or;": "\u2a54",
-    "Oscr;": "\U0001d4aa",
-    "Oslash": "\xd8",
-    "Oslash;": "\xd8",
-    "Otilde": "\xd5",
-    "Otilde;": "\xd5",
-    "Otimes;": "\u2a37",
-    "Ouml": "\xd6",
-    "Ouml;": "\xd6",
-    "OverBar;": "\u203e",
-    "OverBrace;": "\u23de",
-    "OverBracket;": "\u23b4",
-    "OverParenthesis;": "\u23dc",
-    "PartialD;": "\u2202",
-    "Pcy;": "\u041f",
-    "Pfr;": "\U0001d513",
-    "Phi;": "\u03a6",
-    "Pi;": "\u03a0",
-    "PlusMinus;": "\xb1",
-    "Poincareplane;": "\u210c",
-    "Popf;": "\u2119",
-    "Pr;": "\u2abb",
-    "Precedes;": "\u227a",
-    "PrecedesEqual;": "\u2aaf",
-    "PrecedesSlantEqual;": "\u227c",
-    "PrecedesTilde;": "\u227e",
-    "Prime;": "\u2033",
-    "Product;": "\u220f",
-    "Proportion;": "\u2237",
-    "Proportional;": "\u221d",
-    "Pscr;": "\U0001d4ab",
-    "Psi;": "\u03a8",
-    "QUOT": "\"",
-    "QUOT;": "\"",
-    "Qfr;": "\U0001d514",
-    "Qopf;": "\u211a",
-    "Qscr;": "\U0001d4ac",
-    "RBarr;": "\u2910",
-    "REG": "\xae",
-    "REG;": "\xae",
-    "Racute;": "\u0154",
-    "Rang;": "\u27eb",
-    "Rarr;": "\u21a0",
-    "Rarrtl;": "\u2916",
-    "Rcaron;": "\u0158",
-    "Rcedil;": "\u0156",
-    "Rcy;": "\u0420",
-    "Re;": "\u211c",
-    "ReverseElement;": "\u220b",
-    "ReverseEquilibrium;": "\u21cb",
-    "ReverseUpEquilibrium;": "\u296f",
-    "Rfr;": "\u211c",
-    "Rho;": "\u03a1",
-    "RightAngleBracket;": "\u27e9",
-    "RightArrow;": "\u2192",
-    "RightArrowBar;": "\u21e5",
-    "RightArrowLeftArrow;": "\u21c4",
-    "RightCeiling;": "\u2309",
-    "RightDoubleBracket;": "\u27e7",
-    "RightDownTeeVector;": "\u295d",
-    "RightDownVector;": "\u21c2",
-    "RightDownVectorBar;": "\u2955",
-    "RightFloor;": "\u230b",
-    "RightTee;": "\u22a2",
-    "RightTeeArrow;": "\u21a6",
-    "RightTeeVector;": "\u295b",
-    "RightTriangle;": "\u22b3",
-    "RightTriangleBar;": "\u29d0",
-    "RightTriangleEqual;": "\u22b5",
-    "RightUpDownVector;": "\u294f",
-    "RightUpTeeVector;": "\u295c",
-    "RightUpVector;": "\u21be",
-    "RightUpVectorBar;": "\u2954",
-    "RightVector;": "\u21c0",
-    "RightVectorBar;": "\u2953",
-    "Rightarrow;": "\u21d2",
-    "Ropf;": "\u211d",
-    "RoundImplies;": "\u2970",
-    "Rrightarrow;": "\u21db",
-    "Rscr;": "\u211b",
-    "Rsh;": "\u21b1",
-    "RuleDelayed;": "\u29f4",
-    "SHCHcy;": "\u0429",
-    "SHcy;": "\u0428",
-    "SOFTcy;": "\u042c",
-    "Sacute;": "\u015a",
-    "Sc;": "\u2abc",
-    "Scaron;": "\u0160",
-    "Scedil;": "\u015e",
-    "Scirc;": "\u015c",
-    "Scy;": "\u0421",
-    "Sfr;": "\U0001d516",
-    "ShortDownArrow;": "\u2193",
-    "ShortLeftArrow;": "\u2190",
-    "ShortRightArrow;": "\u2192",
-    "ShortUpArrow;": "\u2191",
-    "Sigma;": "\u03a3",
-    "SmallCircle;": "\u2218",
-    "Sopf;": "\U0001d54a",
-    "Sqrt;": "\u221a",
-    "Square;": "\u25a1",
-    "SquareIntersection;": "\u2293",
-    "SquareSubset;": "\u228f",
-    "SquareSubsetEqual;": "\u2291",
-    "SquareSuperset;": "\u2290",
-    "SquareSupersetEqual;": "\u2292",
-    "SquareUnion;": "\u2294",
-    "Sscr;": "\U0001d4ae",
-    "Star;": "\u22c6",
-    "Sub;": "\u22d0",
-    "Subset;": "\u22d0",
-    "SubsetEqual;": "\u2286",
-    "Succeeds;": "\u227b",
-    "SucceedsEqual;": "\u2ab0",
-    "SucceedsSlantEqual;": "\u227d",
-    "SucceedsTilde;": "\u227f",
-    "SuchThat;": "\u220b",
-    "Sum;": "\u2211",
-    "Sup;": "\u22d1",
-    "Superset;": "\u2283",
-    "SupersetEqual;": "\u2287",
-    "Supset;": "\u22d1",
-    "THORN": "\xde",
-    "THORN;": "\xde",
-    "TRADE;": "\u2122",
-    "TSHcy;": "\u040b",
-    "TScy;": "\u0426",
-    "Tab;": "\t",
-    "Tau;": "\u03a4",
-    "Tcaron;": "\u0164",
-    "Tcedil;": "\u0162",
-    "Tcy;": "\u0422",
-    "Tfr;": "\U0001d517",
-    "Therefore;": "\u2234",
-    "Theta;": "\u0398",
-    "ThickSpace;": "\u205f\u200a",
-    "ThinSpace;": "\u2009",
-    "Tilde;": "\u223c",
-    "TildeEqual;": "\u2243",
-    "TildeFullEqual;": "\u2245",
-    "TildeTilde;": "\u2248",
-    "Topf;": "\U0001d54b",
-    "TripleDot;": "\u20db",
-    "Tscr;": "\U0001d4af",
-    "Tstrok;": "\u0166",
-    "Uacute": "\xda",
-    "Uacute;": "\xda",
-    "Uarr;": "\u219f",
-    "Uarrocir;": "\u2949",
-    "Ubrcy;": "\u040e",
-    "Ubreve;": "\u016c",
-    "Ucirc": "\xdb",
-    "Ucirc;": "\xdb",
-    "Ucy;": "\u0423",
-    "Udblac;": "\u0170",
-    "Ufr;": "\U0001d518",
-    "Ugrave": "\xd9",
-    "Ugrave;": "\xd9",
-    "Umacr;": "\u016a",
-    "UnderBar;": "_",
-    "UnderBrace;": "\u23df",
-    "UnderBracket;": "\u23b5",
-    "UnderParenthesis;": "\u23dd",
-    "Union;": "\u22c3",
-    "UnionPlus;": "\u228e",
-    "Uogon;": "\u0172",
-    "Uopf;": "\U0001d54c",
-    "UpArrow;": "\u2191",
-    "UpArrowBar;": "\u2912",
-    "UpArrowDownArrow;": "\u21c5",
-    "UpDownArrow;": "\u2195",
-    "UpEquilibrium;": "\u296e",
-    "UpTee;": "\u22a5",
-    "UpTeeArrow;": "\u21a5",
-    "Uparrow;": "\u21d1",
-    "Updownarrow;": "\u21d5",
-    "UpperLeftArrow;": "\u2196",
-    "UpperRightArrow;": "\u2197",
-    "Upsi;": "\u03d2",
-    "Upsilon;": "\u03a5",
-    "Uring;": "\u016e",
-    "Uscr;": "\U0001d4b0",
-    "Utilde;": "\u0168",
-    "Uuml": "\xdc",
-    "Uuml;": "\xdc",
-    "VDash;": "\u22ab",
-    "Vbar;": "\u2aeb",
-    "Vcy;": "\u0412",
-    "Vdash;": "\u22a9",
-    "Vdashl;": "\u2ae6",
-    "Vee;": "\u22c1",
-    "Verbar;": "\u2016",
-    "Vert;": "\u2016",
-    "VerticalBar;": "\u2223",
-    "VerticalLine;": "|",
-    "VerticalSeparator;": "\u2758",
-    "VerticalTilde;": "\u2240",
-    "VeryThinSpace;": "\u200a",
-    "Vfr;": "\U0001d519",
-    "Vopf;": "\U0001d54d",
-    "Vscr;": "\U0001d4b1",
-    "Vvdash;": "\u22aa",
-    "Wcirc;": "\u0174",
-    "Wedge;": "\u22c0",
-    "Wfr;": "\U0001d51a",
-    "Wopf;": "\U0001d54e",
-    "Wscr;": "\U0001d4b2",
-    "Xfr;": "\U0001d51b",
-    "Xi;": "\u039e",
-    "Xopf;": "\U0001d54f",
-    "Xscr;": "\U0001d4b3",
-    "YAcy;": "\u042f",
-    "YIcy;": "\u0407",
-    "YUcy;": "\u042e",
-    "Yacute": "\xdd",
-    "Yacute;": "\xdd",
-    "Ycirc;": "\u0176",
-    "Ycy;": "\u042b",
-    "Yfr;": "\U0001d51c",
-    "Yopf;": "\U0001d550",
-    "Yscr;": "\U0001d4b4",
-    "Yuml;": "\u0178",
-    "ZHcy;": "\u0416",
-    "Zacute;": "\u0179",
-    "Zcaron;": "\u017d",
-    "Zcy;": "\u0417",
-    "Zdot;": "\u017b",
-    "ZeroWidthSpace;": "\u200b",
-    "Zeta;": "\u0396",
-    "Zfr;": "\u2128",
-    "Zopf;": "\u2124",
-    "Zscr;": "\U0001d4b5",
-    "aacute": "\xe1",
-    "aacute;": "\xe1",
-    "abreve;": "\u0103",
-    "ac;": "\u223e",
-    "acE;": "\u223e\u0333",
-    "acd;": "\u223f",
-    "acirc": "\xe2",
-    "acirc;": "\xe2",
-    "acute": "\xb4",
-    "acute;": "\xb4",
-    "acy;": "\u0430",
-    "aelig": "\xe6",
-    "aelig;": "\xe6",
-    "af;": "\u2061",
-    "afr;": "\U0001d51e",
-    "agrave": "\xe0",
-    "agrave;": "\xe0",
-    "alefsym;": "\u2135",
-    "aleph;": "\u2135",
-    "alpha;": "\u03b1",
-    "amacr;": "\u0101",
-    "amalg;": "\u2a3f",
-    "amp": "&",
-    "amp;": "&",
-    "and;": "\u2227",
-    "andand;": "\u2a55",
-    "andd;": "\u2a5c",
-    "andslope;": "\u2a58",
-    "andv;": "\u2a5a",
-    "ang;": "\u2220",
-    "ange;": "\u29a4",
-    "angle;": "\u2220",
-    "angmsd;": "\u2221",
-    "angmsdaa;": "\u29a8",
-    "angmsdab;": "\u29a9",
-    "angmsdac;": "\u29aa",
-    "angmsdad;": "\u29ab",
-    "angmsdae;": "\u29ac",
-    "angmsdaf;": "\u29ad",
-    "angmsdag;": "\u29ae",
-    "angmsdah;": "\u29af",
-    "angrt;": "\u221f",
-    "angrtvb;": "\u22be",
-    "angrtvbd;": "\u299d",
-    "angsph;": "\u2222",
-    "angst;": "\xc5",
-    "angzarr;": "\u237c",
-    "aogon;": "\u0105",
-    "aopf;": "\U0001d552",
-    "ap;": "\u2248",
-    "apE;": "\u2a70",
-    "apacir;": "\u2a6f",
-    "ape;": "\u224a",
-    "apid;": "\u224b",
-    "apos;": "'",
-    "approx;": "\u2248",
-    "approxeq;": "\u224a",
-    "aring": "\xe5",
-    "aring;": "\xe5",
-    "ascr;": "\U0001d4b6",
-    "ast;": "*",
-    "asymp;": "\u2248",
-    "asympeq;": "\u224d",
-    "atilde": "\xe3",
-    "atilde;": "\xe3",
-    "auml": "\xe4",
-    "auml;": "\xe4",
-    "awconint;": "\u2233",
-    "awint;": "\u2a11",
-    "bNot;": "\u2aed",
-    "backcong;": "\u224c",
-    "backepsilon;": "\u03f6",
-    "backprime;": "\u2035",
-    "backsim;": "\u223d",
-    "backsimeq;": "\u22cd",
-    "barvee;": "\u22bd",
-    "barwed;": "\u2305",
-    "barwedge;": "\u2305",
-    "bbrk;": "\u23b5",
-    "bbrktbrk;": "\u23b6",
-    "bcong;": "\u224c",
-    "bcy;": "\u0431",
-    "bdquo;": "\u201e",
-    "becaus;": "\u2235",
-    "because;": "\u2235",
-    "bemptyv;": "\u29b0",
-    "bepsi;": "\u03f6",
-    "bernou;": "\u212c",
-    "beta;": "\u03b2",
-    "beth;": "\u2136",
-    "between;": "\u226c",
-    "bfr;": "\U0001d51f",
-    "bigcap;": "\u22c2",
-    "bigcirc;": "\u25ef",
-    "bigcup;": "\u22c3",
-    "bigodot;": "\u2a00",
-    "bigoplus;": "\u2a01",
-    "bigotimes;": "\u2a02",
-    "bigsqcup;": "\u2a06",
-    "bigstar;": "\u2605",
-    "bigtriangledown;": "\u25bd",
-    "bigtriangleup;": "\u25b3",
-    "biguplus;": "\u2a04",
-    "bigvee;": "\u22c1",
-    "bigwedge;": "\u22c0",
-    "bkarow;": "\u290d",
-    "blacklozenge;": "\u29eb",
-    "blacksquare;": "\u25aa",
-    "blacktriangle;": "\u25b4",
-    "blacktriangledown;": "\u25be",
-    "blacktriangleleft;": "\u25c2",
-    "blacktriangleright;": "\u25b8",
-    "blank;": "\u2423",
-    "blk12;": "\u2592",
-    "blk14;": "\u2591",
-    "blk34;": "\u2593",
-    "block;": "\u2588",
-    "bne;": "=\u20e5",
-    "bnequiv;": "\u2261\u20e5",
-    "bnot;": "\u2310",
-    "bopf;": "\U0001d553",
-    "bot;": "\u22a5",
-    "bottom;": "\u22a5",
-    "bowtie;": "\u22c8",
-    "boxDL;": "\u2557",
-    "boxDR;": "\u2554",
-    "boxDl;": "\u2556",
-    "boxDr;": "\u2553",
-    "boxH;": "\u2550",
-    "boxHD;": "\u2566",
-    "boxHU;": "\u2569",
-    "boxHd;": "\u2564",
-    "boxHu;": "\u2567",
-    "boxUL;": "\u255d",
-    "boxUR;": "\u255a",
-    "boxUl;": "\u255c",
-    "boxUr;": "\u2559",
-    "boxV;": "\u2551",
-    "boxVH;": "\u256c",
-    "boxVL;": "\u2563",
-    "boxVR;": "\u2560",
-    "boxVh;": "\u256b",
-    "boxVl;": "\u2562",
-    "boxVr;": "\u255f",
-    "boxbox;": "\u29c9",
-    "boxdL;": "\u2555",
-    "boxdR;": "\u2552",
-    "boxdl;": "\u2510",
-    "boxdr;": "\u250c",
-    "boxh;": "\u2500",
-    "boxhD;": "\u2565",
-    "boxhU;": "\u2568",
-    "boxhd;": "\u252c",
-    "boxhu;": "\u2534",
-    "boxminus;": "\u229f",
-    "boxplus;": "\u229e",
-    "boxtimes;": "\u22a0",
-    "boxuL;": "\u255b",
-    "boxuR;": "\u2558",
-    "boxul;": "\u2518",
-    "boxur;": "\u2514",
-    "boxv;": "\u2502",
-    "boxvH;": "\u256a",
-    "boxvL;": "\u2561",
-    "boxvR;": "\u255e",
-    "boxvh;": "\u253c",
-    "boxvl;": "\u2524",
-    "boxvr;": "\u251c",
-    "bprime;": "\u2035",
-    "breve;": "\u02d8",
-    "brvbar": "\xa6",
-    "brvbar;": "\xa6",
-    "bscr;": "\U0001d4b7",
-    "bsemi;": "\u204f",
-    "bsim;": "\u223d",
-    "bsime;": "\u22cd",
-    "bsol;": "\\",
-    "bsolb;": "\u29c5",
-    "bsolhsub;": "\u27c8",
-    "bull;": "\u2022",
-    "bullet;": "\u2022",
-    "bump;": "\u224e",
-    "bumpE;": "\u2aae",
-    "bumpe;": "\u224f",
-    "bumpeq;": "\u224f",
-    "cacute;": "\u0107",
-    "cap;": "\u2229",
-    "capand;": "\u2a44",
-    "capbrcup;": "\u2a49",
-    "capcap;": "\u2a4b",
-    "capcup;": "\u2a47",
-    "capdot;": "\u2a40",
-    "caps;": "\u2229\ufe00",
-    "caret;": "\u2041",
-    "caron;": "\u02c7",
-    "ccaps;": "\u2a4d",
-    "ccaron;": "\u010d",
-    "ccedil": "\xe7",
-    "ccedil;": "\xe7",
-    "ccirc;": "\u0109",
-    "ccups;": "\u2a4c",
-    "ccupssm;": "\u2a50",
-    "cdot;": "\u010b",
-    "cedil": "\xb8",
-    "cedil;": "\xb8",
-    "cemptyv;": "\u29b2",
-    "cent": "\xa2",
-    "cent;": "\xa2",
-    "centerdot;": "\xb7",
-    "cfr;": "\U0001d520",
-    "chcy;": "\u0447",
-    "check;": "\u2713",
-    "checkmark;": "\u2713",
-    "chi;": "\u03c7",
-    "cir;": "\u25cb",
-    "cirE;": "\u29c3",
-    "circ;": "\u02c6",
-    "circeq;": "\u2257",
-    "circlearrowleft;": "\u21ba",
-    "circlearrowright;": "\u21bb",
-    "circledR;": "\xae",
-    "circledS;": "\u24c8",
-    "circledast;": "\u229b",
-    "circledcirc;": "\u229a",
-    "circleddash;": "\u229d",
-    "cire;": "\u2257",
-    "cirfnint;": "\u2a10",
-    "cirmid;": "\u2aef",
-    "cirscir;": "\u29c2",
-    "clubs;": "\u2663",
-    "clubsuit;": "\u2663",
-    "colon;": ":",
-    "colone;": "\u2254",
-    "coloneq;": "\u2254",
-    "comma;": ",",
-    "commat;": "@",
-    "comp;": "\u2201",
-    "compfn;": "\u2218",
-    "complement;": "\u2201",
-    "complexes;": "\u2102",
-    "cong;": "\u2245",
-    "congdot;": "\u2a6d",
-    "conint;": "\u222e",
-    "copf;": "\U0001d554",
-    "coprod;": "\u2210",
-    "copy": "\xa9",
-    "copy;": "\xa9",
-    "copysr;": "\u2117",
-    "crarr;": "\u21b5",
-    "cross;": "\u2717",
-    "cscr;": "\U0001d4b8",
-    "csub;": "\u2acf",
-    "csube;": "\u2ad1",
-    "csup;": "\u2ad0",
-    "csupe;": "\u2ad2",
-    "ctdot;": "\u22ef",
-    "cudarrl;": "\u2938",
-    "cudarrr;": "\u2935",
-    "cuepr;": "\u22de",
-    "cuesc;": "\u22df",
-    "cularr;": "\u21b6",
-    "cularrp;": "\u293d",
-    "cup;": "\u222a",
-    "cupbrcap;": "\u2a48",
-    "cupcap;": "\u2a46",
-    "cupcup;": "\u2a4a",
-    "cupdot;": "\u228d",
-    "cupor;": "\u2a45",
-    "cups;": "\u222a\ufe00",
-    "curarr;": "\u21b7",
-    "curarrm;": "\u293c",
-    "curlyeqprec;": "\u22de",
-    "curlyeqsucc;": "\u22df",
-    "curlyvee;": "\u22ce",
-    "curlywedge;": "\u22cf",
-    "curren": "\xa4",
-    "curren;": "\xa4",
-    "curvearrowleft;": "\u21b6",
-    "curvearrowright;": "\u21b7",
-    "cuvee;": "\u22ce",
-    "cuwed;": "\u22cf",
-    "cwconint;": "\u2232",
-    "cwint;": "\u2231",
-    "cylcty;": "\u232d",
-    "dArr;": "\u21d3",
-    "dHar;": "\u2965",
-    "dagger;": "\u2020",
-    "daleth;": "\u2138",
-    "darr;": "\u2193",
-    "dash;": "\u2010",
-    "dashv;": "\u22a3",
-    "dbkarow;": "\u290f",
-    "dblac;": "\u02dd",
-    "dcaron;": "\u010f",
-    "dcy;": "\u0434",
-    "dd;": "\u2146",
-    "ddagger;": "\u2021",
-    "ddarr;": "\u21ca",
-    "ddotseq;": "\u2a77",
-    "deg": "\xb0",
-    "deg;": "\xb0",
-    "delta;": "\u03b4",
-    "demptyv;": "\u29b1",
-    "dfisht;": "\u297f",
-    "dfr;": "\U0001d521",
-    "dharl;": "\u21c3",
-    "dharr;": "\u21c2",
-    "diam;": "\u22c4",
-    "diamond;": "\u22c4",
-    "diamondsuit;": "\u2666",
-    "diams;": "\u2666",
-    "die;": "\xa8",
-    "digamma;": "\u03dd",
-    "disin;": "\u22f2",
-    "div;": "\xf7",
-    "divide": "\xf7",
-    "divide;": "\xf7",
-    "divideontimes;": "\u22c7",
-    "divonx;": "\u22c7",
-    "djcy;": "\u0452",
-    "dlcorn;": "\u231e",
-    "dlcrop;": "\u230d",
-    "dollar;": "$",
-    "dopf;": "\U0001d555",
-    "dot;": "\u02d9",
-    "doteq;": "\u2250",
-    "doteqdot;": "\u2251",
-    "dotminus;": "\u2238",
-    "dotplus;": "\u2214",
-    "dotsquare;": "\u22a1",
-    "doublebarwedge;": "\u2306",
-    "downarrow;": "\u2193",
-    "downdownarrows;": "\u21ca",
-    "downharpoonleft;": "\u21c3",
-    "downharpoonright;": "\u21c2",
-    "drbkarow;": "\u2910",
-    "drcorn;": "\u231f",
-    "drcrop;": "\u230c",
-    "dscr;": "\U0001d4b9",
-    "dscy;": "\u0455",
-    "dsol;": "\u29f6",
-    "dstrok;": "\u0111",
-    "dtdot;": "\u22f1",
-    "dtri;": "\u25bf",
-    "dtrif;": "\u25be",
-    "duarr;": "\u21f5",
-    "duhar;": "\u296f",
-    "dwangle;": "\u29a6",
-    "dzcy;": "\u045f",
-    "dzigrarr;": "\u27ff",
-    "eDDot;": "\u2a77",
-    "eDot;": "\u2251",
-    "eacute": "\xe9",
-    "eacute;": "\xe9",
-    "easter;": "\u2a6e",
-    "ecaron;": "\u011b",
-    "ecir;": "\u2256",
-    "ecirc": "\xea",
-    "ecirc;": "\xea",
-    "ecolon;": "\u2255",
-    "ecy;": "\u044d",
-    "edot;": "\u0117",
-    "ee;": "\u2147",
-    "efDot;": "\u2252",
-    "efr;": "\U0001d522",
-    "eg;": "\u2a9a",
-    "egrave": "\xe8",
-    "egrave;": "\xe8",
-    "egs;": "\u2a96",
-    "egsdot;": "\u2a98",
-    "el;": "\u2a99",
-    "elinters;": "\u23e7",
-    "ell;": "\u2113",
-    "els;": "\u2a95",
-    "elsdot;": "\u2a97",
-    "emacr;": "\u0113",
-    "empty;": "\u2205",
-    "emptyset;": "\u2205",
-    "emptyv;": "\u2205",
-    "emsp13;": "\u2004",
-    "emsp14;": "\u2005",
-    "emsp;": "\u2003",
-    "eng;": "\u014b",
-    "ensp;": "\u2002",
-    "eogon;": "\u0119",
-    "eopf;": "\U0001d556",
-    "epar;": "\u22d5",
-    "eparsl;": "\u29e3",
-    "eplus;": "\u2a71",
-    "epsi;": "\u03b5",
-    "epsilon;": "\u03b5",
-    "epsiv;": "\u03f5",
-    "eqcirc;": "\u2256",
-    "eqcolon;": "\u2255",
-    "eqsim;": "\u2242",
-    "eqslantgtr;": "\u2a96",
-    "eqslantless;": "\u2a95",
-    "equals;": "=",
-    "equest;": "\u225f",
-    "equiv;": "\u2261",
-    "equivDD;": "\u2a78",
-    "eqvparsl;": "\u29e5",
-    "erDot;": "\u2253",
-    "erarr;": "\u2971",
-    "escr;": "\u212f",
-    "esdot;": "\u2250",
-    "esim;": "\u2242",
-    "eta;": "\u03b7",
-    "eth": "\xf0",
-    "eth;": "\xf0",
-    "euml": "\xeb",
-    "euml;": "\xeb",
-    "euro;": "\u20ac",
-    "excl;": "!",
-    "exist;": "\u2203",
-    "expectation;": "\u2130",
-    "exponentiale;": "\u2147",
-    "fallingdotseq;": "\u2252",
-    "fcy;": "\u0444",
-    "female;": "\u2640",
-    "ffilig;": "\ufb03",
-    "fflig;": "\ufb00",
-    "ffllig;": "\ufb04",
-    "ffr;": "\U0001d523",
-    "filig;": "\ufb01",
-    "fjlig;": "fj",
-    "flat;": "\u266d",
-    "fllig;": "\ufb02",
-    "fltns;": "\u25b1",
-    "fnof;": "\u0192",
-    "fopf;": "\U0001d557",
-    "forall;": "\u2200",
-    "fork;": "\u22d4",
-    "forkv;": "\u2ad9",
-    "fpartint;": "\u2a0d",
-    "frac12": "\xbd",
-    "frac12;": "\xbd",
-    "frac13;": "\u2153",
-    "frac14": "\xbc",
-    "frac14;": "\xbc",
-    "frac15;": "\u2155",
-    "frac16;": "\u2159",
-    "frac18;": "\u215b",
-    "frac23;": "\u2154",
-    "frac25;": "\u2156",
-    "frac34": "\xbe",
-    "frac34;": "\xbe",
-    "frac35;": "\u2157",
-    "frac38;": "\u215c",
-    "frac45;": "\u2158",
-    "frac56;": "\u215a",
-    "frac58;": "\u215d",
-    "frac78;": "\u215e",
-    "frasl;": "\u2044",
-    "frown;": "\u2322",
-    "fscr;": "\U0001d4bb",
-    "gE;": "\u2267",
-    "gEl;": "\u2a8c",
-    "gacute;": "\u01f5",
-    "gamma;": "\u03b3",
-    "gammad;": "\u03dd",
-    "gap;": "\u2a86",
-    "gbreve;": "\u011f",
-    "gcirc;": "\u011d",
-    "gcy;": "\u0433",
-    "gdot;": "\u0121",
-    "ge;": "\u2265",
-    "gel;": "\u22db",
-    "geq;": "\u2265",
-    "geqq;": "\u2267",
-    "geqslant;": "\u2a7e",
-    "ges;": "\u2a7e",
-    "gescc;": "\u2aa9",
-    "gesdot;": "\u2a80",
-    "gesdoto;": "\u2a82",
-    "gesdotol;": "\u2a84",
-    "gesl;": "\u22db\ufe00",
-    "gesles;": "\u2a94",
-    "gfr;": "\U0001d524",
-    "gg;": "\u226b",
-    "ggg;": "\u22d9",
-    "gimel;": "\u2137",
-    "gjcy;": "\u0453",
-    "gl;": "\u2277",
-    "glE;": "\u2a92",
-    "gla;": "\u2aa5",
-    "glj;": "\u2aa4",
-    "gnE;": "\u2269",
-    "gnap;": "\u2a8a",
-    "gnapprox;": "\u2a8a",
-    "gne;": "\u2a88",
-    "gneq;": "\u2a88",
-    "gneqq;": "\u2269",
-    "gnsim;": "\u22e7",
-    "gopf;": "\U0001d558",
-    "grave;": "`",
-    "gscr;": "\u210a",
-    "gsim;": "\u2273",
-    "gsime;": "\u2a8e",
-    "gsiml;": "\u2a90",
-    "gt": ">",
-    "gt;": ">",
-    "gtcc;": "\u2aa7",
-    "gtcir;": "\u2a7a",
-    "gtdot;": "\u22d7",
-    "gtlPar;": "\u2995",
-    "gtquest;": "\u2a7c",
-    "gtrapprox;": "\u2a86",
-    "gtrarr;": "\u2978",
-    "gtrdot;": "\u22d7",
-    "gtreqless;": "\u22db",
-    "gtreqqless;": "\u2a8c",
-    "gtrless;": "\u2277",
-    "gtrsim;": "\u2273",
-    "gvertneqq;": "\u2269\ufe00",
-    "gvnE;": "\u2269\ufe00",
-    "hArr;": "\u21d4",
-    "hairsp;": "\u200a",
-    "half;": "\xbd",
-    "hamilt;": "\u210b",
-    "hardcy;": "\u044a",
-    "harr;": "\u2194",
-    "harrcir;": "\u2948",
-    "harrw;": "\u21ad",
-    "hbar;": "\u210f",
-    "hcirc;": "\u0125",
-    "hearts;": "\u2665",
-    "heartsuit;": "\u2665",
-    "hellip;": "\u2026",
-    "hercon;": "\u22b9",
-    "hfr;": "\U0001d525",
-    "hksearow;": "\u2925",
-    "hkswarow;": "\u2926",
-    "hoarr;": "\u21ff",
-    "homtht;": "\u223b",
-    "hookleftarrow;": "\u21a9",
-    "hookrightarrow;": "\u21aa",
-    "hopf;": "\U0001d559",
-    "horbar;": "\u2015",
-    "hscr;": "\U0001d4bd",
-    "hslash;": "\u210f",
-    "hstrok;": "\u0127",
-    "hybull;": "\u2043",
-    "hyphen;": "\u2010",
-    "iacute": "\xed",
-    "iacute;": "\xed",
-    "ic;": "\u2063",
-    "icirc": "\xee",
-    "icirc;": "\xee",
-    "icy;": "\u0438",
-    "iecy;": "\u0435",
-    "iexcl": "\xa1",
-    "iexcl;": "\xa1",
-    "iff;": "\u21d4",
-    "ifr;": "\U0001d526",
-    "igrave": "\xec",
-    "igrave;": "\xec",
-    "ii;": "\u2148",
-    "iiiint;": "\u2a0c",
-    "iiint;": "\u222d",
-    "iinfin;": "\u29dc",
-    "iiota;": "\u2129",
-    "ijlig;": "\u0133",
-    "imacr;": "\u012b",
-    "image;": "\u2111",
-    "imagline;": "\u2110",
-    "imagpart;": "\u2111",
-    "imath;": "\u0131",
-    "imof;": "\u22b7",
-    "imped;": "\u01b5",
-    "in;": "\u2208",
-    "incare;": "\u2105",
-    "infin;": "\u221e",
-    "infintie;": "\u29dd",
-    "inodot;": "\u0131",
-    "int;": "\u222b",
-    "intcal;": "\u22ba",
-    "integers;": "\u2124",
-    "intercal;": "\u22ba",
-    "intlarhk;": "\u2a17",
-    "intprod;": "\u2a3c",
-    "iocy;": "\u0451",
-    "iogon;": "\u012f",
-    "iopf;": "\U0001d55a",
-    "iota;": "\u03b9",
-    "iprod;": "\u2a3c",
-    "iquest": "\xbf",
-    "iquest;": "\xbf",
-    "iscr;": "\U0001d4be",
-    "isin;": "\u2208",
-    "isinE;": "\u22f9",
-    "isindot;": "\u22f5",
-    "isins;": "\u22f4",
-    "isinsv;": "\u22f3",
-    "isinv;": "\u2208",
-    "it;": "\u2062",
-    "itilde;": "\u0129",
-    "iukcy;": "\u0456",
-    "iuml": "\xef",
-    "iuml;": "\xef",
-    "jcirc;": "\u0135",
-    "jcy;": "\u0439",
-    "jfr;": "\U0001d527",
-    "jmath;": "\u0237",
-    "jopf;": "\U0001d55b",
-    "jscr;": "\U0001d4bf",
-    "jsercy;": "\u0458",
-    "jukcy;": "\u0454",
-    "kappa;": "\u03ba",
-    "kappav;": "\u03f0",
-    "kcedil;": "\u0137",
-    "kcy;": "\u043a",
-    "kfr;": "\U0001d528",
-    "kgreen;": "\u0138",
-    "khcy;": "\u0445",
-    "kjcy;": "\u045c",
-    "kopf;": "\U0001d55c",
-    "kscr;": "\U0001d4c0",
-    "lAarr;": "\u21da",
-    "lArr;": "\u21d0",
-    "lAtail;": "\u291b",
-    "lBarr;": "\u290e",
-    "lE;": "\u2266",
-    "lEg;": "\u2a8b",
-    "lHar;": "\u2962",
-    "lacute;": "\u013a",
-    "laemptyv;": "\u29b4",
-    "lagran;": "\u2112",
-    "lambda;": "\u03bb",
-    "lang;": "\u27e8",
-    "langd;": "\u2991",
-    "langle;": "\u27e8",
-    "lap;": "\u2a85",
-    "laquo": "\xab",
-    "laquo;": "\xab",
-    "larr;": "\u2190",
-    "larrb;": "\u21e4",
-    "larrbfs;": "\u291f",
-    "larrfs;": "\u291d",
-    "larrhk;": "\u21a9",
-    "larrlp;": "\u21ab",
-    "larrpl;": "\u2939",
-    "larrsim;": "\u2973",
-    "larrtl;": "\u21a2",
-    "lat;": "\u2aab",
-    "latail;": "\u2919",
-    "late;": "\u2aad",
-    "lates;": "\u2aad\ufe00",
-    "lbarr;": "\u290c",
-    "lbbrk;": "\u2772",
-    "lbrace;": "{",
-    "lbrack;": "[",
-    "lbrke;": "\u298b",
-    "lbrksld;": "\u298f",
-    "lbrkslu;": "\u298d",
-    "lcaron;": "\u013e",
-    "lcedil;": "\u013c",
-    "lceil;": "\u2308",
-    "lcub;": "{",
-    "lcy;": "\u043b",
-    "ldca;": "\u2936",
-    "ldquo;": "\u201c",
-    "ldquor;": "\u201e",
-    "ldrdhar;": "\u2967",
-    "ldrushar;": "\u294b",
-    "ldsh;": "\u21b2",
-    "le;": "\u2264",
-    "leftarrow;": "\u2190",
-    "leftarrowtail;": "\u21a2",
-    "leftharpoondown;": "\u21bd",
-    "leftharpoonup;": "\u21bc",
-    "leftleftarrows;": "\u21c7",
-    "leftrightarrow;": "\u2194",
-    "leftrightarrows;": "\u21c6",
-    "leftrightharpoons;": "\u21cb",
-    "leftrightsquigarrow;": "\u21ad",
-    "leftthreetimes;": "\u22cb",
-    "leg;": "\u22da",
-    "leq;": "\u2264",
-    "leqq;": "\u2266",
-    "leqslant;": "\u2a7d",
-    "les;": "\u2a7d",
-    "lescc;": "\u2aa8",
-    "lesdot;": "\u2a7f",
-    "lesdoto;": "\u2a81",
-    "lesdotor;": "\u2a83",
-    "lesg;": "\u22da\ufe00",
-    "lesges;": "\u2a93",
-    "lessapprox;": "\u2a85",
-    "lessdot;": "\u22d6",
-    "lesseqgtr;": "\u22da",
-    "lesseqqgtr;": "\u2a8b",
-    "lessgtr;": "\u2276",
-    "lesssim;": "\u2272",
-    "lfisht;": "\u297c",
-    "lfloor;": "\u230a",
-    "lfr;": "\U0001d529",
-    "lg;": "\u2276",
-    "lgE;": "\u2a91",
-    "lhard;": "\u21bd",
-    "lharu;": "\u21bc",
-    "lharul;": "\u296a",
-    "lhblk;": "\u2584",
-    "ljcy;": "\u0459",
-    "ll;": "\u226a",
-    "llarr;": "\u21c7",
-    "llcorner;": "\u231e",
-    "llhard;": "\u296b",
-    "lltri;": "\u25fa",
-    "lmidot;": "\u0140",
-    "lmoust;": "\u23b0",
-    "lmoustache;": "\u23b0",
-    "lnE;": "\u2268",
-    "lnap;": "\u2a89",
-    "lnapprox;": "\u2a89",
-    "lne;": "\u2a87",
-    "lneq;": "\u2a87",
-    "lneqq;": "\u2268",
-    "lnsim;": "\u22e6",
-    "loang;": "\u27ec",
-    "loarr;": "\u21fd",
-    "lobrk;": "\u27e6",
-    "longleftarrow;": "\u27f5",
-    "longleftrightarrow;": "\u27f7",
-    "longmapsto;": "\u27fc",
-    "longrightarrow;": "\u27f6",
-    "looparrowleft;": "\u21ab",
-    "looparrowright;": "\u21ac",
-    "lopar;": "\u2985",
-    "lopf;": "\U0001d55d",
-    "loplus;": "\u2a2d",
-    "lotimes;": "\u2a34",
-    "lowast;": "\u2217",
-    "lowbar;": "_",
-    "loz;": "\u25ca",
-    "lozenge;": "\u25ca",
-    "lozf;": "\u29eb",
-    "lpar;": "(",
-    "lparlt;": "\u2993",
-    "lrarr;": "\u21c6",
-    "lrcorner;": "\u231f",
-    "lrhar;": "\u21cb",
-    "lrhard;": "\u296d",
-    "lrm;": "\u200e",
-    "lrtri;": "\u22bf",
-    "lsaquo;": "\u2039",
-    "lscr;": "\U0001d4c1",
-    "lsh;": "\u21b0",
-    "lsim;": "\u2272",
-    "lsime;": "\u2a8d",
-    "lsimg;": "\u2a8f",
-    "lsqb;": "[",
-    "lsquo;": "\u2018",
-    "lsquor;": "\u201a",
-    "lstrok;": "\u0142",
-    "lt": "<",
-    "lt;": "<",
-    "ltcc;": "\u2aa6",
-    "ltcir;": "\u2a79",
-    "ltdot;": "\u22d6",
-    "lthree;": "\u22cb",
-    "ltimes;": "\u22c9",
-    "ltlarr;": "\u2976",
-    "ltquest;": "\u2a7b",
-    "ltrPar;": "\u2996",
-    "ltri;": "\u25c3",
-    "ltrie;": "\u22b4",
-    "ltrif;": "\u25c2",
-    "lurdshar;": "\u294a",
-    "luruhar;": "\u2966",
-    "lvertneqq;": "\u2268\ufe00",
-    "lvnE;": "\u2268\ufe00",
-    "mDDot;": "\u223a",
-    "macr": "\xaf",
-    "macr;": "\xaf",
-    "male;": "\u2642",
-    "malt;": "\u2720",
-    "maltese;": "\u2720",
-    "map;": "\u21a6",
-    "mapsto;": "\u21a6",
-    "mapstodown;": "\u21a7",
-    "mapstoleft;": "\u21a4",
-    "mapstoup;": "\u21a5",
-    "marker;": "\u25ae",
-    "mcomma;": "\u2a29",
-    "mcy;": "\u043c",
-    "mdash;": "\u2014",
-    "measuredangle;": "\u2221",
-    "mfr;": "\U0001d52a",
-    "mho;": "\u2127",
-    "micro": "\xb5",
-    "micro;": "\xb5",
-    "mid;": "\u2223",
-    "midast;": "*",
-    "midcir;": "\u2af0",
-    "middot": "\xb7",
-    "middot;": "\xb7",
-    "minus;": "\u2212",
-    "minusb;": "\u229f",
-    "minusd;": "\u2238",
-    "minusdu;": "\u2a2a",
-    "mlcp;": "\u2adb",
-    "mldr;": "\u2026",
-    "mnplus;": "\u2213",
-    "models;": "\u22a7",
-    "mopf;": "\U0001d55e",
-    "mp;": "\u2213",
-    "mscr;": "\U0001d4c2",
-    "mstpos;": "\u223e",
-    "mu;": "\u03bc",
-    "multimap;": "\u22b8",
-    "mumap;": "\u22b8",
-    "nGg;": "\u22d9\u0338",
-    "nGt;": "\u226b\u20d2",
-    "nGtv;": "\u226b\u0338",
-    "nLeftarrow;": "\u21cd",
-    "nLeftrightarrow;": "\u21ce",
-    "nLl;": "\u22d8\u0338",
-    "nLt;": "\u226a\u20d2",
-    "nLtv;": "\u226a\u0338",
-    "nRightarrow;": "\u21cf",
-    "nVDash;": "\u22af",
-    "nVdash;": "\u22ae",
-    "nabla;": "\u2207",
-    "nacute;": "\u0144",
-    "nang;": "\u2220\u20d2",
-    "nap;": "\u2249",
-    "napE;": "\u2a70\u0338",
-    "napid;": "\u224b\u0338",
-    "napos;": "\u0149",
-    "napprox;": "\u2249",
-    "natur;": "\u266e",
-    "natural;": "\u266e",
-    "naturals;": "\u2115",
-    "nbsp": "\xa0",
-    "nbsp;": "\xa0",
-    "nbump;": "\u224e\u0338",
-    "nbumpe;": "\u224f\u0338",
-    "ncap;": "\u2a43",
-    "ncaron;": "\u0148",
-    "ncedil;": "\u0146",
-    "ncong;": "\u2247",
-    "ncongdot;": "\u2a6d\u0338",
-    "ncup;": "\u2a42",
-    "ncy;": "\u043d",
-    "ndash;": "\u2013",
-    "ne;": "\u2260",
-    "neArr;": "\u21d7",
-    "nearhk;": "\u2924",
-    "nearr;": "\u2197",
-    "nearrow;": "\u2197",
-    "nedot;": "\u2250\u0338",
-    "nequiv;": "\u2262",
-    "nesear;": "\u2928",
-    "nesim;": "\u2242\u0338",
-    "nexist;": "\u2204",
-    "nexists;": "\u2204",
-    "nfr;": "\U0001d52b",
-    "ngE;": "\u2267\u0338",
-    "nge;": "\u2271",
-    "ngeq;": "\u2271",
-    "ngeqq;": "\u2267\u0338",
-    "ngeqslant;": "\u2a7e\u0338",
-    "nges;": "\u2a7e\u0338",
-    "ngsim;": "\u2275",
-    "ngt;": "\u226f",
-    "ngtr;": "\u226f",
-    "nhArr;": "\u21ce",
-    "nharr;": "\u21ae",
-    "nhpar;": "\u2af2",
-    "ni;": "\u220b",
-    "nis;": "\u22fc",
-    "nisd;": "\u22fa",
-    "niv;": "\u220b",
-    "njcy;": "\u045a",
-    "nlArr;": "\u21cd",
-    "nlE;": "\u2266\u0338",
-    "nlarr;": "\u219a",
-    "nldr;": "\u2025",
-    "nle;": "\u2270",
-    "nleftarrow;": "\u219a",
-    "nleftrightarrow;": "\u21ae",
-    "nleq;": "\u2270",
-    "nleqq;": "\u2266\u0338",
-    "nleqslant;": "\u2a7d\u0338",
-    "nles;": "\u2a7d\u0338",
-    "nless;": "\u226e",
-    "nlsim;": "\u2274",
-    "nlt;": "\u226e",
-    "nltri;": "\u22ea",
-    "nltrie;": "\u22ec",
-    "nmid;": "\u2224",
-    "nopf;": "\U0001d55f",
-    "not": "\xac",
-    "not;": "\xac",
-    "notin;": "\u2209",
-    "notinE;": "\u22f9\u0338",
-    "notindot;": "\u22f5\u0338",
-    "notinva;": "\u2209",
-    "notinvb;": "\u22f7",
-    "notinvc;": "\u22f6",
-    "notni;": "\u220c",
-    "notniva;": "\u220c",
-    "notnivb;": "\u22fe",
-    "notnivc;": "\u22fd",
-    "npar;": "\u2226",
-    "nparallel;": "\u2226",
-    "nparsl;": "\u2afd\u20e5",
-    "npart;": "\u2202\u0338",
-    "npolint;": "\u2a14",
-    "npr;": "\u2280",
-    "nprcue;": "\u22e0",
-    "npre;": "\u2aaf\u0338",
-    "nprec;": "\u2280",
-    "npreceq;": "\u2aaf\u0338",
-    "nrArr;": "\u21cf",
-    "nrarr;": "\u219b",
-    "nrarrc;": "\u2933\u0338",
-    "nrarrw;": "\u219d\u0338",
-    "nrightarrow;": "\u219b",
-    "nrtri;": "\u22eb",
-    "nrtrie;": "\u22ed",
-    "nsc;": "\u2281",
-    "nsccue;": "\u22e1",
-    "nsce;": "\u2ab0\u0338",
-    "nscr;": "\U0001d4c3",
-    "nshortmid;": "\u2224",
-    "nshortparallel;": "\u2226",
-    "nsim;": "\u2241",
-    "nsime;": "\u2244",
-    "nsimeq;": "\u2244",
-    "nsmid;": "\u2224",
-    "nspar;": "\u2226",
-    "nsqsube;": "\u22e2",
-    "nsqsupe;": "\u22e3",
-    "nsub;": "\u2284",
-    "nsubE;": "\u2ac5\u0338",
-    "nsube;": "\u2288",
-    "nsubset;": "\u2282\u20d2",
-    "nsubseteq;": "\u2288",
-    "nsubseteqq;": "\u2ac5\u0338",
-    "nsucc;": "\u2281",
-    "nsucceq;": "\u2ab0\u0338",
-    "nsup;": "\u2285",
-    "nsupE;": "\u2ac6\u0338",
-    "nsupe;": "\u2289",
-    "nsupset;": "\u2283\u20d2",
-    "nsupseteq;": "\u2289",
-    "nsupseteqq;": "\u2ac6\u0338",
-    "ntgl;": "\u2279",
-    "ntilde": "\xf1",
-    "ntilde;": "\xf1",
-    "ntlg;": "\u2278",
-    "ntriangleleft;": "\u22ea",
-    "ntrianglelefteq;": "\u22ec",
-    "ntriangleright;": "\u22eb",
-    "ntrianglerighteq;": "\u22ed",
-    "nu;": "\u03bd",
-    "num;": "#",
-    "numero;": "\u2116",
-    "numsp;": "\u2007",
-    "nvDash;": "\u22ad",
-    "nvHarr;": "\u2904",
-    "nvap;": "\u224d\u20d2",
-    "nvdash;": "\u22ac",
-    "nvge;": "\u2265\u20d2",
-    "nvgt;": ">\u20d2",
-    "nvinfin;": "\u29de",
-    "nvlArr;": "\u2902",
-    "nvle;": "\u2264\u20d2",
-    "nvlt;": "<\u20d2",
-    "nvltrie;": "\u22b4\u20d2",
-    "nvrArr;": "\u2903",
-    "nvrtrie;": "\u22b5\u20d2",
-    "nvsim;": "\u223c\u20d2",
-    "nwArr;": "\u21d6",
-    "nwarhk;": "\u2923",
-    "nwarr;": "\u2196",
-    "nwarrow;": "\u2196",
-    "nwnear;": "\u2927",
-    "oS;": "\u24c8",
-    "oacute": "\xf3",
-    "oacute;": "\xf3",
-    "oast;": "\u229b",
-    "ocir;": "\u229a",
-    "ocirc": "\xf4",
-    "ocirc;": "\xf4",
-    "ocy;": "\u043e",
-    "odash;": "\u229d",
-    "odblac;": "\u0151",
-    "odiv;": "\u2a38",
-    "odot;": "\u2299",
-    "odsold;": "\u29bc",
-    "oelig;": "\u0153",
-    "ofcir;": "\u29bf",
-    "ofr;": "\U0001d52c",
-    "ogon;": "\u02db",
-    "ograve": "\xf2",
-    "ograve;": "\xf2",
-    "ogt;": "\u29c1",
-    "ohbar;": "\u29b5",
-    "ohm;": "\u03a9",
-    "oint;": "\u222e",
-    "olarr;": "\u21ba",
-    "olcir;": "\u29be",
-    "olcross;": "\u29bb",
-    "oline;": "\u203e",
-    "olt;": "\u29c0",
-    "omacr;": "\u014d",
-    "omega;": "\u03c9",
-    "omicron;": "\u03bf",
-    "omid;": "\u29b6",
-    "ominus;": "\u2296",
-    "oopf;": "\U0001d560",
-    "opar;": "\u29b7",
-    "operp;": "\u29b9",
-    "oplus;": "\u2295",
-    "or;": "\u2228",
-    "orarr;": "\u21bb",
-    "ord;": "\u2a5d",
-    "order;": "\u2134",
-    "orderof;": "\u2134",
-    "ordf": "\xaa",
-    "ordf;": "\xaa",
-    "ordm": "\xba",
-    "ordm;": "\xba",
-    "origof;": "\u22b6",
-    "oror;": "\u2a56",
-    "orslope;": "\u2a57",
-    "orv;": "\u2a5b",
-    "oscr;": "\u2134",
-    "oslash": "\xf8",
-    "oslash;": "\xf8",
-    "osol;": "\u2298",
-    "otilde": "\xf5",
-    "otilde;": "\xf5",
-    "otimes;": "\u2297",
-    "otimesas;": "\u2a36",
-    "ouml": "\xf6",
-    "ouml;": "\xf6",
-    "ovbar;": "\u233d",
-    "par;": "\u2225",
-    "para": "\xb6",
-    "para;": "\xb6",
-    "parallel;": "\u2225",
-    "parsim;": "\u2af3",
-    "parsl;": "\u2afd",
-    "part;": "\u2202",
-    "pcy;": "\u043f",
-    "percnt;": "%",
-    "period;": ".",
-    "permil;": "\u2030",
-    "perp;": "\u22a5",
-    "pertenk;": "\u2031",
-    "pfr;": "\U0001d52d",
-    "phi;": "\u03c6",
-    "phiv;": "\u03d5",
-    "phmmat;": "\u2133",
-    "phone;": "\u260e",
-    "pi;": "\u03c0",
-    "pitchfork;": "\u22d4",
-    "piv;": "\u03d6",
-    "planck;": "\u210f",
-    "planckh;": "\u210e",
-    "plankv;": "\u210f",
-    "plus;": "+",
-    "plusacir;": "\u2a23",
-    "plusb;": "\u229e",
-    "pluscir;": "\u2a22",
-    "plusdo;": "\u2214",
-    "plusdu;": "\u2a25",
-    "pluse;": "\u2a72",
-    "plusmn": "\xb1",
-    "plusmn;": "\xb1",
-    "plussim;": "\u2a26",
-    "plustwo;": "\u2a27",
-    "pm;": "\xb1",
-    "pointint;": "\u2a15",
-    "popf;": "\U0001d561",
-    "pound": "\xa3",
-    "pound;": "\xa3",
-    "pr;": "\u227a",
-    "prE;": "\u2ab3",
-    "prap;": "\u2ab7",
-    "prcue;": "\u227c",
-    "pre;": "\u2aaf",
-    "prec;": "\u227a",
-    "precapprox;": "\u2ab7",
-    "preccurlyeq;": "\u227c",
-    "preceq;": "\u2aaf",
-    "precnapprox;": "\u2ab9",
-    "precneqq;": "\u2ab5",
-    "precnsim;": "\u22e8",
-    "precsim;": "\u227e",
-    "prime;": "\u2032",
-    "primes;": "\u2119",
-    "prnE;": "\u2ab5",
-    "prnap;": "\u2ab9",
-    "prnsim;": "\u22e8",
-    "prod;": "\u220f",
-    "profalar;": "\u232e",
-    "profline;": "\u2312",
-    "profsurf;": "\u2313",
-    "prop;": "\u221d",
-    "propto;": "\u221d",
-    "prsim;": "\u227e",
-    "prurel;": "\u22b0",
-    "pscr;": "\U0001d4c5",
-    "psi;": "\u03c8",
-    "puncsp;": "\u2008",
-    "qfr;": "\U0001d52e",
-    "qint;": "\u2a0c",
-    "qopf;": "\U0001d562",
-    "qprime;": "\u2057",
-    "qscr;": "\U0001d4c6",
-    "quaternions;": "\u210d",
-    "quatint;": "\u2a16",
-    "quest;": "?",
-    "questeq;": "\u225f",
-    "quot": "\"",
-    "quot;": "\"",
-    "rAarr;": "\u21db",
-    "rArr;": "\u21d2",
-    "rAtail;": "\u291c",
-    "rBarr;": "\u290f",
-    "rHar;": "\u2964",
-    "race;": "\u223d\u0331",
-    "racute;": "\u0155",
-    "radic;": "\u221a",
-    "raemptyv;": "\u29b3",
-    "rang;": "\u27e9",
-    "rangd;": "\u2992",
-    "range;": "\u29a5",
-    "rangle;": "\u27e9",
-    "raquo": "\xbb",
-    "raquo;": "\xbb",
-    "rarr;": "\u2192",
-    "rarrap;": "\u2975",
-    "rarrb;": "\u21e5",
-    "rarrbfs;": "\u2920",
-    "rarrc;": "\u2933",
-    "rarrfs;": "\u291e",
-    "rarrhk;": "\u21aa",
-    "rarrlp;": "\u21ac",
-    "rarrpl;": "\u2945",
-    "rarrsim;": "\u2974",
-    "rarrtl;": "\u21a3",
-    "rarrw;": "\u219d",
-    "ratail;": "\u291a",
-    "ratio;": "\u2236",
-    "rationals;": "\u211a",
-    "rbarr;": "\u290d",
-    "rbbrk;": "\u2773",
-    "rbrace;": "}",
-    "rbrack;": "]",
-    "rbrke;": "\u298c",
-    "rbrksld;": "\u298e",
-    "rbrkslu;": "\u2990",
-    "rcaron;": "\u0159",
-    "rcedil;": "\u0157",
-    "rceil;": "\u2309",
-    "rcub;": "}",
-    "rcy;": "\u0440",
-    "rdca;": "\u2937",
-    "rdldhar;": "\u2969",
-    "rdquo;": "\u201d",
-    "rdquor;": "\u201d",
-    "rdsh;": "\u21b3",
-    "real;": "\u211c",
-    "realine;": "\u211b",
-    "realpart;": "\u211c",
-    "reals;": "\u211d",
-    "rect;": "\u25ad",
-    "reg": "\xae",
-    "reg;": "\xae",
-    "rfisht;": "\u297d",
-    "rfloor;": "\u230b",
-    "rfr;": "\U0001d52f",
-    "rhard;": "\u21c1",
-    "rharu;": "\u21c0",
-    "rharul;": "\u296c",
-    "rho;": "\u03c1",
-    "rhov;": "\u03f1",
-    "rightarrow;": "\u2192",
-    "rightarrowtail;": "\u21a3",
-    "rightharpoondown;": "\u21c1",
-    "rightharpoonup;": "\u21c0",
-    "rightleftarrows;": "\u21c4",
-    "rightleftharpoons;": "\u21cc",
-    "rightrightarrows;": "\u21c9",
-    "rightsquigarrow;": "\u219d",
-    "rightthreetimes;": "\u22cc",
-    "ring;": "\u02da",
-    "risingdotseq;": "\u2253",
-    "rlarr;": "\u21c4",
-    "rlhar;": "\u21cc",
-    "rlm;": "\u200f",
-    "rmoust;": "\u23b1",
-    "rmoustache;": "\u23b1",
-    "rnmid;": "\u2aee",
-    "roang;": "\u27ed",
-    "roarr;": "\u21fe",
-    "robrk;": "\u27e7",
-    "ropar;": "\u2986",
-    "ropf;": "\U0001d563",
-    "roplus;": "\u2a2e",
-    "rotimes;": "\u2a35",
-    "rpar;": ")",
-    "rpargt;": "\u2994",
-    "rppolint;": "\u2a12",
-    "rrarr;": "\u21c9",
-    "rsaquo;": "\u203a",
-    "rscr;": "\U0001d4c7",
-    "rsh;": "\u21b1",
-    "rsqb;": "]",
-    "rsquo;": "\u2019",
-    "rsquor;": "\u2019",
-    "rthree;": "\u22cc",
-    "rtimes;": "\u22ca",
-    "rtri;": "\u25b9",
-    "rtrie;": "\u22b5",
-    "rtrif;": "\u25b8",
-    "rtriltri;": "\u29ce",
-    "ruluhar;": "\u2968",
-    "rx;": "\u211e",
-    "sacute;": "\u015b",
-    "sbquo;": "\u201a",
-    "sc;": "\u227b",
-    "scE;": "\u2ab4",
-    "scap;": "\u2ab8",
-    "scaron;": "\u0161",
-    "sccue;": "\u227d",
-    "sce;": "\u2ab0",
-    "scedil;": "\u015f",
-    "scirc;": "\u015d",
-    "scnE;": "\u2ab6",
-    "scnap;": "\u2aba",
-    "scnsim;": "\u22e9",
-    "scpolint;": "\u2a13",
-    "scsim;": "\u227f",
-    "scy;": "\u0441",
-    "sdot;": "\u22c5",
-    "sdotb;": "\u22a1",
-    "sdote;": "\u2a66",
-    "seArr;": "\u21d8",
-    "searhk;": "\u2925",
-    "searr;": "\u2198",
-    "searrow;": "\u2198",
-    "sect": "\xa7",
-    "sect;": "\xa7",
-    "semi;": ";",
-    "seswar;": "\u2929",
-    "setminus;": "\u2216",
-    "setmn;": "\u2216",
-    "sext;": "\u2736",
-    "sfr;": "\U0001d530",
-    "sfrown;": "\u2322",
-    "sharp;": "\u266f",
-    "shchcy;": "\u0449",
-    "shcy;": "\u0448",
-    "shortmid;": "\u2223",
-    "shortparallel;": "\u2225",
-    "shy": "\xad",
-    "shy;": "\xad",
-    "sigma;": "\u03c3",
-    "sigmaf;": "\u03c2",
-    "sigmav;": "\u03c2",
-    "sim;": "\u223c",
-    "simdot;": "\u2a6a",
-    "sime;": "\u2243",
-    "simeq;": "\u2243",
-    "simg;": "\u2a9e",
-    "simgE;": "\u2aa0",
-    "siml;": "\u2a9d",
-    "simlE;": "\u2a9f",
-    "simne;": "\u2246",
-    "simplus;": "\u2a24",
-    "simrarr;": "\u2972",
-    "slarr;": "\u2190",
-    "smallsetminus;": "\u2216",
-    "smashp;": "\u2a33",
-    "smeparsl;": "\u29e4",
-    "smid;": "\u2223",
-    "smile;": "\u2323",
-    "smt;": "\u2aaa",
-    "smte;": "\u2aac",
-    "smtes;": "\u2aac\ufe00",
-    "softcy;": "\u044c",
-    "sol;": "/",
-    "solb;": "\u29c4",
-    "solbar;": "\u233f",
-    "sopf;": "\U0001d564",
-    "spades;": "\u2660",
-    "spadesuit;": "\u2660",
-    "spar;": "\u2225",
-    "sqcap;": "\u2293",
-    "sqcaps;": "\u2293\ufe00",
-    "sqcup;": "\u2294",
-    "sqcups;": "\u2294\ufe00",
-    "sqsub;": "\u228f",
-    "sqsube;": "\u2291",
-    "sqsubset;": "\u228f",
-    "sqsubseteq;": "\u2291",
-    "sqsup;": "\u2290",
-    "sqsupe;": "\u2292",
-    "sqsupset;": "\u2290",
-    "sqsupseteq;": "\u2292",
-    "squ;": "\u25a1",
-    "square;": "\u25a1",
-    "squarf;": "\u25aa",
-    "squf;": "\u25aa",
-    "srarr;": "\u2192",
-    "sscr;": "\U0001d4c8",
-    "ssetmn;": "\u2216",
-    "ssmile;": "\u2323",
-    "sstarf;": "\u22c6",
-    "star;": "\u2606",
-    "starf;": "\u2605",
-    "straightepsilon;": "\u03f5",
-    "straightphi;": "\u03d5",
-    "strns;": "\xaf",
-    "sub;": "\u2282",
-    "subE;": "\u2ac5",
-    "subdot;": "\u2abd",
-    "sube;": "\u2286",
-    "subedot;": "\u2ac3",
-    "submult;": "\u2ac1",
-    "subnE;": "\u2acb",
-    "subne;": "\u228a",
-    "subplus;": "\u2abf",
-    "subrarr;": "\u2979",
-    "subset;": "\u2282",
-    "subseteq;": "\u2286",
-    "subseteqq;": "\u2ac5",
-    "subsetneq;": "\u228a",
-    "subsetneqq;": "\u2acb",
-    "subsim;": "\u2ac7",
-    "subsub;": "\u2ad5",
-    "subsup;": "\u2ad3",
-    "succ;": "\u227b",
-    "succapprox;": "\u2ab8",
-    "succcurlyeq;": "\u227d",
-    "succeq;": "\u2ab0",
-    "succnapprox;": "\u2aba",
-    "succneqq;": "\u2ab6",
-    "succnsim;": "\u22e9",
-    "succsim;": "\u227f",
-    "sum;": "\u2211",
-    "sung;": "\u266a",
-    "sup1": "\xb9",
-    "sup1;": "\xb9",
-    "sup2": "\xb2",
-    "sup2;": "\xb2",
-    "sup3": "\xb3",
-    "sup3;": "\xb3",
-    "sup;": "\u2283",
-    "supE;": "\u2ac6",
-    "supdot;": "\u2abe",
-    "supdsub;": "\u2ad8",
-    "supe;": "\u2287",
-    "supedot;": "\u2ac4",
-    "suphsol;": "\u27c9",
-    "suphsub;": "\u2ad7",
-    "suplarr;": "\u297b",
-    "supmult;": "\u2ac2",
-    "supnE;": "\u2acc",
-    "supne;": "\u228b",
-    "supplus;": "\u2ac0",
-    "supset;": "\u2283",
-    "supseteq;": "\u2287",
-    "supseteqq;": "\u2ac6",
-    "supsetneq;": "\u228b",
-    "supsetneqq;": "\u2acc",
-    "supsim;": "\u2ac8",
-    "supsub;": "\u2ad4",
-    "supsup;": "\u2ad6",
-    "swArr;": "\u21d9",
-    "swarhk;": "\u2926",
-    "swarr;": "\u2199",
-    "swarrow;": "\u2199",
-    "swnwar;": "\u292a",
-    "szlig": "\xdf",
-    "szlig;": "\xdf",
-    "target;": "\u2316",
-    "tau;": "\u03c4",
-    "tbrk;": "\u23b4",
-    "tcaron;": "\u0165",
-    "tcedil;": "\u0163",
-    "tcy;": "\u0442",
-    "tdot;": "\u20db",
-    "telrec;": "\u2315",
-    "tfr;": "\U0001d531",
-    "there4;": "\u2234",
-    "therefore;": "\u2234",
-    "theta;": "\u03b8",
-    "thetasym;": "\u03d1",
-    "thetav;": "\u03d1",
-    "thickapprox;": "\u2248",
-    "thicksim;": "\u223c",
-    "thinsp;": "\u2009",
-    "thkap;": "\u2248",
-    "thksim;": "\u223c",
-    "thorn": "\xfe",
-    "thorn;": "\xfe",
-    "tilde;": "\u02dc",
-    "times": "\xd7",
-    "times;": "\xd7",
-    "timesb;": "\u22a0",
-    "timesbar;": "\u2a31",
-    "timesd;": "\u2a30",
-    "tint;": "\u222d",
-    "toea;": "\u2928",
-    "top;": "\u22a4",
-    "topbot;": "\u2336",
-    "topcir;": "\u2af1",
-    "topf;": "\U0001d565",
-    "topfork;": "\u2ada",
-    "tosa;": "\u2929",
-    "tprime;": "\u2034",
-    "trade;": "\u2122",
-    "triangle;": "\u25b5",
-    "triangledown;": "\u25bf",
-    "triangleleft;": "\u25c3",
-    "trianglelefteq;": "\u22b4",
-    "triangleq;": "\u225c",
-    "triangleright;": "\u25b9",
-    "trianglerighteq;": "\u22b5",
-    "tridot;": "\u25ec",
-    "trie;": "\u225c",
-    "triminus;": "\u2a3a",
-    "triplus;": "\u2a39",
-    "trisb;": "\u29cd",
-    "tritime;": "\u2a3b",
-    "trpezium;": "\u23e2",
-    "tscr;": "\U0001d4c9",
-    "tscy;": "\u0446",
-    "tshcy;": "\u045b",
-    "tstrok;": "\u0167",
-    "twixt;": "\u226c",
-    "twoheadleftarrow;": "\u219e",
-    "twoheadrightarrow;": "\u21a0",
-    "uArr;": "\u21d1",
-    "uHar;": "\u2963",
-    "uacute": "\xfa",
-    "uacute;": "\xfa",
-    "uarr;": "\u2191",
-    "ubrcy;": "\u045e",
-    "ubreve;": "\u016d",
-    "ucirc": "\xfb",
-    "ucirc;": "\xfb",
-    "ucy;": "\u0443",
-    "udarr;": "\u21c5",
-    "udblac;": "\u0171",
-    "udhar;": "\u296e",
-    "ufisht;": "\u297e",
-    "ufr;": "\U0001d532",
-    "ugrave": "\xf9",
-    "ugrave;": "\xf9",
-    "uharl;": "\u21bf",
-    "uharr;": "\u21be",
-    "uhblk;": "\u2580",
-    "ulcorn;": "\u231c",
-    "ulcorner;": "\u231c",
-    "ulcrop;": "\u230f",
-    "ultri;": "\u25f8",
-    "umacr;": "\u016b",
-    "uml": "\xa8",
-    "uml;": "\xa8",
-    "uogon;": "\u0173",
-    "uopf;": "\U0001d566",
-    "uparrow;": "\u2191",
-    "updownarrow;": "\u2195",
-    "upharpoonleft;": "\u21bf",
-    "upharpoonright;": "\u21be",
-    "uplus;": "\u228e",
-    "upsi;": "\u03c5",
-    "upsih;": "\u03d2",
-    "upsilon;": "\u03c5",
-    "upuparrows;": "\u21c8",
-    "urcorn;": "\u231d",
-    "urcorner;": "\u231d",
-    "urcrop;": "\u230e",
-    "uring;": "\u016f",
-    "urtri;": "\u25f9",
-    "uscr;": "\U0001d4ca",
-    "utdot;": "\u22f0",
-    "utilde;": "\u0169",
-    "utri;": "\u25b5",
-    "utrif;": "\u25b4",
-    "uuarr;": "\u21c8",
-    "uuml": "\xfc",
-    "uuml;": "\xfc",
-    "uwangle;": "\u29a7",
-    "vArr;": "\u21d5",
-    "vBar;": "\u2ae8",
-    "vBarv;": "\u2ae9",
-    "vDash;": "\u22a8",
-    "vangrt;": "\u299c",
-    "varepsilon;": "\u03f5",
-    "varkappa;": "\u03f0",
-    "varnothing;": "\u2205",
-    "varphi;": "\u03d5",
-    "varpi;": "\u03d6",
-    "varpropto;": "\u221d",
-    "varr;": "\u2195",
-    "varrho;": "\u03f1",
-    "varsigma;": "\u03c2",
-    "varsubsetneq;": "\u228a\ufe00",
-    "varsubsetneqq;": "\u2acb\ufe00",
-    "varsupsetneq;": "\u228b\ufe00",
-    "varsupsetneqq;": "\u2acc\ufe00",
-    "vartheta;": "\u03d1",
-    "vartriangleleft;": "\u22b2",
-    "vartriangleright;": "\u22b3",
-    "vcy;": "\u0432",
-    "vdash;": "\u22a2",
-    "vee;": "\u2228",
-    "veebar;": "\u22bb",
-    "veeeq;": "\u225a",
-    "vellip;": "\u22ee",
-    "verbar;": "|",
-    "vert;": "|",
-    "vfr;": "\U0001d533",
-    "vltri;": "\u22b2",
-    "vnsub;": "\u2282\u20d2",
-    "vnsup;": "\u2283\u20d2",
-    "vopf;": "\U0001d567",
-    "vprop;": "\u221d",
-    "vrtri;": "\u22b3",
-    "vscr;": "\U0001d4cb",
-    "vsubnE;": "\u2acb\ufe00",
-    "vsubne;": "\u228a\ufe00",
-    "vsupnE;": "\u2acc\ufe00",
-    "vsupne;": "\u228b\ufe00",
-    "vzigzag;": "\u299a",
-    "wcirc;": "\u0175",
-    "wedbar;": "\u2a5f",
-    "wedge;": "\u2227",
-    "wedgeq;": "\u2259",
-    "weierp;": "\u2118",
-    "wfr;": "\U0001d534",
-    "wopf;": "\U0001d568",
-    "wp;": "\u2118",
-    "wr;": "\u2240",
-    "wreath;": "\u2240",
-    "wscr;": "\U0001d4cc",
-    "xcap;": "\u22c2",
-    "xcirc;": "\u25ef",
-    "xcup;": "\u22c3",
-    "xdtri;": "\u25bd",
-    "xfr;": "\U0001d535",
-    "xhArr;": "\u27fa",
-    "xharr;": "\u27f7",
-    "xi;": "\u03be",
-    "xlArr;": "\u27f8",
-    "xlarr;": "\u27f5",
-    "xmap;": "\u27fc",
-    "xnis;": "\u22fb",
-    "xodot;": "\u2a00",
-    "xopf;": "\U0001d569",
-    "xoplus;": "\u2a01",
-    "xotime;": "\u2a02",
-    "xrArr;": "\u27f9",
-    "xrarr;": "\u27f6",
-    "xscr;": "\U0001d4cd",
-    "xsqcup;": "\u2a06",
-    "xuplus;": "\u2a04",
-    "xutri;": "\u25b3",
-    "xvee;": "\u22c1",
-    "xwedge;": "\u22c0",
-    "yacute": "\xfd",
-    "yacute;": "\xfd",
-    "yacy;": "\u044f",
-    "ycirc;": "\u0177",
-    "ycy;": "\u044b",
-    "yen": "\xa5",
-    "yen;": "\xa5",
-    "yfr;": "\U0001d536",
-    "yicy;": "\u0457",
-    "yopf;": "\U0001d56a",
-    "yscr;": "\U0001d4ce",
-    "yucy;": "\u044e",
-    "yuml": "\xff",
-    "yuml;": "\xff",
-    "zacute;": "\u017a",
-    "zcaron;": "\u017e",
-    "zcy;": "\u0437",
-    "zdot;": "\u017c",
-    "zeetrf;": "\u2128",
-    "zeta;": "\u03b6",
-    "zfr;": "\U0001d537",
-    "zhcy;": "\u0436",
-    "zigrarr;": "\u21dd",
-    "zopf;": "\U0001d56b",
-    "zscr;": "\U0001d4cf",
-    "zwj;": "\u200d",
-    "zwnj;": "\u200c",
-}
-
-replacementCharacters = {
-    0x0: "\uFFFD",
-    0x0d: "\u000D",
-    0x80: "\u20AC",
-    0x81: "\u0081",
-    0x82: "\u201A",
-    0x83: "\u0192",
-    0x84: "\u201E",
-    0x85: "\u2026",
-    0x86: "\u2020",
-    0x87: "\u2021",
-    0x88: "\u02C6",
-    0x89: "\u2030",
-    0x8A: "\u0160",
-    0x8B: "\u2039",
-    0x8C: "\u0152",
-    0x8D: "\u008D",
-    0x8E: "\u017D",
-    0x8F: "\u008F",
-    0x90: "\u0090",
-    0x91: "\u2018",
-    0x92: "\u2019",
-    0x93: "\u201C",
-    0x94: "\u201D",
-    0x95: "\u2022",
-    0x96: "\u2013",
-    0x97: "\u2014",
-    0x98: "\u02DC",
-    0x99: "\u2122",
-    0x9A: "\u0161",
-    0x9B: "\u203A",
-    0x9C: "\u0153",
-    0x9D: "\u009D",
-    0x9E: "\u017E",
-    0x9F: "\u0178",
-}
-
-tokenTypes = {
-    "Doctype": 0,
-    "Characters": 1,
-    "SpaceCharacters": 2,
-    "StartTag": 3,
-    "EndTag": 4,
-    "EmptyTag": 5,
-    "Comment": 6,
-    "ParseError": 7
-}
-
-tagTokenTypes = frozenset([tokenTypes["StartTag"], tokenTypes["EndTag"],
-                           tokenTypes["EmptyTag"]])
-
-
-prefixes = dict([(v, k) for k, v in namespaces.items()])
-prefixes["http://www.w3.org/1998/Math/MathML"] = "math"
-
-
-class DataLossWarning(UserWarning):
-    """Raised when the current tree is unable to represent the input data"""
-    pass
-
-
-class _ReparseException(Exception):
-    pass
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/filters/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/filters/__init__.py
deleted file mode 100644
index e69de29..0000000
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/filters/alphabeticalattributes.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/filters/alphabeticalattributes.py
deleted file mode 100644
index 5ba926e..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/filters/alphabeticalattributes.py
+++ /dev/null
@@ -1,29 +0,0 @@
-from __future__ import absolute_import, division, unicode_literals
-
-from . import base
-
-from collections import OrderedDict
-
-
-def _attr_key(attr):
-    """Return an appropriate key for an attribute for sorting
-
-    Attributes have a namespace that can be either ``None`` or a string. We
-    can't compare the two because they're different types, so we convert
-    ``None`` to an empty string first.
-
-    """
-    return (attr[0][0] or ''), attr[0][1]
-
-
-class Filter(base.Filter):
-    """Alphabetizes attributes for elements"""
-    def __iter__(self):
-        for token in base.Filter.__iter__(self):
-            if token["type"] in ("StartTag", "EmptyTag"):
-                attrs = OrderedDict()
-                for name, value in sorted(token["data"].items(),
-                                          key=_attr_key):
-                    attrs[name] = value
-                token["data"] = attrs
-            yield token
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/filters/base.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/filters/base.py
deleted file mode 100644
index c7dbaed..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/filters/base.py
+++ /dev/null
@@ -1,12 +0,0 @@
-from __future__ import absolute_import, division, unicode_literals
-
-
-class Filter(object):
-    def __init__(self, source):
-        self.source = source
-
-    def __iter__(self):
-        return iter(self.source)
-
-    def __getattr__(self, name):
-        return getattr(self.source, name)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/filters/inject_meta_charset.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/filters/inject_meta_charset.py
deleted file mode 100644
index aefb5c8..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/filters/inject_meta_charset.py
+++ /dev/null
@@ -1,73 +0,0 @@
-from __future__ import absolute_import, division, unicode_literals
-
-from . import base
-
-
-class Filter(base.Filter):
-    """Injects ``<meta charset=ENCODING>`` tag into head of document"""
-    def __init__(self, source, encoding):
-        """Creates a Filter
-
-        :arg source: the source token stream
-
-        :arg encoding: the encoding to set
-
-        """
-        base.Filter.__init__(self, source)
-        self.encoding = encoding
-
-    def __iter__(self):
-        state = "pre_head"
-        meta_found = (self.encoding is None)
-        pending = []
-
-        for token in base.Filter.__iter__(self):
-            type = token["type"]
-            if type == "StartTag":
-                if token["name"].lower() == "head":
-                    state = "in_head"
-
-            elif type == "EmptyTag":
-                if token["name"].lower() == "meta":
-                    # replace charset with actual encoding
-                    has_http_equiv_content_type = False
-                    for (namespace, name), value in token["data"].items():
-                        if namespace is not None:
-                            continue
-                        elif name.lower() == 'charset':
-                            token["data"][(namespace, name)] = self.encoding
-                            meta_found = True
-                            break
-                        elif name == 'http-equiv' and value.lower() == 'content-type':
-                            has_http_equiv_content_type = True
-                    else:
-                        if has_http_equiv_content_type and (None, "content") in token["data"]:
-                            token["data"][(None, "content")] = 'text/html; charset=%s' % self.encoding
-                            meta_found = True
-
-                elif token["name"].lower() == "head" and not meta_found:
-                    # insert meta into empty head
-                    yield {"type": "StartTag", "name": "head",
-                           "data": token["data"]}
-                    yield {"type": "EmptyTag", "name": "meta",
-                           "data": {(None, "charset"): self.encoding}}
-                    yield {"type": "EndTag", "name": "head"}
-                    meta_found = True
-                    continue
-
-            elif type == "EndTag":
-                if token["name"].lower() == "head" and pending:
-                    # insert meta into head (if necessary) and flush pending queue
-                    yield pending.pop(0)
-                    if not meta_found:
-                        yield {"type": "EmptyTag", "name": "meta",
-                               "data": {(None, "charset"): self.encoding}}
-                    while pending:
-                        yield pending.pop(0)
-                    meta_found = True
-                    state = "post_head"
-
-            if state == "in_head":
-                pending.append(token)
-            else:
-                yield token
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/filters/lint.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/filters/lint.py
deleted file mode 100644
index fcc07ee..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/filters/lint.py
+++ /dev/null
@@ -1,93 +0,0 @@
-from __future__ import absolute_import, division, unicode_literals
-
-from pip._vendor.six import text_type
-
-from . import base
-from ..constants import namespaces, voidElements
-
-from ..constants import spaceCharacters
-spaceCharacters = "".join(spaceCharacters)
-
-
-class Filter(base.Filter):
-    """Lints the token stream for errors
-
-    If it finds any errors, it'll raise an ``AssertionError``.
-
-    """
-    def __init__(self, source, require_matching_tags=True):
-        """Creates a Filter
-
-        :arg source: the source token stream
-
-        :arg require_matching_tags: whether or not to require matching tags
-
-        """
-        super(Filter, self).__init__(source)
-        self.require_matching_tags = require_matching_tags
-
-    def __iter__(self):
-        open_elements = []
-        for token in base.Filter.__iter__(self):
-            type = token["type"]
-            if type in ("StartTag", "EmptyTag"):
-                namespace = token["namespace"]
-                name = token["name"]
-                assert namespace is None or isinstance(namespace, text_type)
-                assert namespace != ""
-                assert isinstance(name, text_type)
-                assert name != ""
-                assert isinstance(token["data"], dict)
-                if (not namespace or namespace == namespaces["html"]) and name in voidElements:
-                    assert type == "EmptyTag"
-                else:
-                    assert type == "StartTag"
-                if type == "StartTag" and self.require_matching_tags:
-                    open_elements.append((namespace, name))
-                for (namespace, name), value in token["data"].items():
-                    assert namespace is None or isinstance(namespace, text_type)
-                    assert namespace != ""
-                    assert isinstance(name, text_type)
-                    assert name != ""
-                    assert isinstance(value, text_type)
-
-            elif type == "EndTag":
-                namespace = token["namespace"]
-                name = token["name"]
-                assert namespace is None or isinstance(namespace, text_type)
-                assert namespace != ""
-                assert isinstance(name, text_type)
-                assert name != ""
-                if (not namespace or namespace == namespaces["html"]) and name in voidElements:
-                    assert False, "Void element reported as EndTag token: %(tag)s" % {"tag": name}
-                elif self.require_matching_tags:
-                    start = open_elements.pop()
-                    assert start == (namespace, name)
-
-            elif type == "Comment":
-                data = token["data"]
-                assert isinstance(data, text_type)
-
-            elif type in ("Characters", "SpaceCharacters"):
-                data = token["data"]
-                assert isinstance(data, text_type)
-                assert data != ""
-                if type == "SpaceCharacters":
-                    assert data.strip(spaceCharacters) == ""
-
-            elif type == "Doctype":
-                name = token["name"]
-                assert name is None or isinstance(name, text_type)
-                assert token["publicId"] is None or isinstance(name, text_type)
-                assert token["systemId"] is None or isinstance(name, text_type)
-
-            elif type == "Entity":
-                assert isinstance(token["name"], text_type)
-
-            elif type == "SerializerError":
-                assert isinstance(token["data"], text_type)
-
-            else:
-                assert False, "Unknown token type: %(type)s" % {"type": type}
-
-            yield token
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/filters/optionaltags.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/filters/optionaltags.py
deleted file mode 100644
index 4a86501..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/filters/optionaltags.py
+++ /dev/null
@@ -1,207 +0,0 @@
-from __future__ import absolute_import, division, unicode_literals
-
-from . import base
-
-
-class Filter(base.Filter):
-    """Removes optional tags from the token stream"""
-    def slider(self):
-        previous1 = previous2 = None
-        for token in self.source:
-            if previous1 is not None:
-                yield previous2, previous1, token
-            previous2 = previous1
-            previous1 = token
-        if previous1 is not None:
-            yield previous2, previous1, None
-
-    def __iter__(self):
-        for previous, token, next in self.slider():
-            type = token["type"]
-            if type == "StartTag":
-                if (token["data"] or
-                        not self.is_optional_start(token["name"], previous, next)):
-                    yield token
-            elif type == "EndTag":
-                if not self.is_optional_end(token["name"], next):
-                    yield token
-            else:
-                yield token
-
-    def is_optional_start(self, tagname, previous, next):
-        type = next and next["type"] or None
-        if tagname in 'html':
-            # An html element's start tag may be omitted if the first thing
-            # inside the html element is not a space character or a comment.
-            return type not in ("Comment", "SpaceCharacters")
-        elif tagname == 'head':
-            # A head element's start tag may be omitted if the first thing
-            # inside the head element is an element.
-            # XXX: we also omit the start tag if the head element is empty
-            if type in ("StartTag", "EmptyTag"):
-                return True
-            elif type == "EndTag":
-                return next["name"] == "head"
-        elif tagname == 'body':
-            # A body element's start tag may be omitted if the first thing
-            # inside the body element is not a space character or a comment,
-            # except if the first thing inside the body element is a script
-            # or style element and the node immediately preceding the body
-            # element is a head element whose end tag has been omitted.
-            if type in ("Comment", "SpaceCharacters"):
-                return False
-            elif type == "StartTag":
-                # XXX: we do not look at the preceding event, so we never omit
-                # the body element's start tag if it's followed by a script or
-                # a style element.
-                return next["name"] not in ('script', 'style')
-            else:
-                return True
-        elif tagname == 'colgroup':
-            # A colgroup element's start tag may be omitted if the first thing
-            # inside the colgroup element is a col element, and if the element
-            # is not immediately preceded by another colgroup element whose
-            # end tag has been omitted.
-            if type in ("StartTag", "EmptyTag"):
-                # XXX: we do not look at the preceding event, so instead we never
-                # omit the colgroup element's end tag when it is immediately
-                # followed by another colgroup element. See is_optional_end.
-                return next["name"] == "col"
-            else:
-                return False
-        elif tagname == 'tbody':
-            # A tbody element's start tag may be omitted if the first thing
-            # inside the tbody element is a tr element, and if the element is
-            # not immediately preceded by a tbody, thead, or tfoot element
-            # whose end tag has been omitted.
-            if type == "StartTag":
-                # omit the thead and tfoot elements' end tag when they are
-                # immediately followed by a tbody element. See is_optional_end.
-                if previous and previous['type'] == 'EndTag' and \
-                        previous['name'] in ('tbody', 'thead', 'tfoot'):
-                    return False
-                return next["name"] == 'tr'
-            else:
-                return False
-        return False
-
-    def is_optional_end(self, tagname, next):
-        type = next and next["type"] or None
-        if tagname in ('html', 'head', 'body'):
-            # An html element's end tag may be omitted if the html element
-            # is not immediately followed by a space character or a comment.
-            return type not in ("Comment", "SpaceCharacters")
-        elif tagname in ('li', 'optgroup', 'tr'):
-            # A li element's end tag may be omitted if the li element is
-            # immediately followed by another li element or if there is
-            # no more content in the parent element.
-            # An optgroup element's end tag may be omitted if the optgroup
-            # element is immediately followed by another optgroup element,
-            # or if there is no more content in the parent element.
-            # A tr element's end tag may be omitted if the tr element is
-            # immediately followed by another tr element, or if there is
-            # no more content in the parent element.
-            if type == "StartTag":
-                return next["name"] == tagname
-            else:
-                return type == "EndTag" or type is None
-        elif tagname in ('dt', 'dd'):
-            # A dt element's end tag may be omitted if the dt element is
-            # immediately followed by another dt element or a dd element.
-            # A dd element's end tag may be omitted if the dd element is
-            # immediately followed by another dd element or a dt element,
-            # or if there is no more content in the parent element.
-            if type == "StartTag":
-                return next["name"] in ('dt', 'dd')
-            elif tagname == 'dd':
-                return type == "EndTag" or type is None
-            else:
-                return False
-        elif tagname == 'p':
-            # A p element's end tag may be omitted if the p element is
-            # immediately followed by an address, article, aside,
-            # blockquote, datagrid, dialog, dir, div, dl, fieldset,
-            # footer, form, h1, h2, h3, h4, h5, h6, header, hr, menu,
-            # nav, ol, p, pre, section, table, or ul, element, or if
-            # there is no more content in the parent element.
-            if type in ("StartTag", "EmptyTag"):
-                return next["name"] in ('address', 'article', 'aside',
-                                        'blockquote', 'datagrid', 'dialog',
-                                        'dir', 'div', 'dl', 'fieldset', 'footer',
-                                        'form', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6',
-                                        'header', 'hr', 'menu', 'nav', 'ol',
-                                        'p', 'pre', 'section', 'table', 'ul')
-            else:
-                return type == "EndTag" or type is None
-        elif tagname == 'option':
-            # An option element's end tag may be omitted if the option
-            # element is immediately followed by another option element,
-            # or if it is immediately followed by an <code>optgroup</code>
-            # element, or if there is no more content in the parent
-            # element.
-            if type == "StartTag":
-                return next["name"] in ('option', 'optgroup')
-            else:
-                return type == "EndTag" or type is None
-        elif tagname in ('rt', 'rp'):
-            # An rt element's end tag may be omitted if the rt element is
-            # immediately followed by an rt or rp element, or if there is
-            # no more content in the parent element.
-            # An rp element's end tag may be omitted if the rp element is
-            # immediately followed by an rt or rp element, or if there is
-            # no more content in the parent element.
-            if type == "StartTag":
-                return next["name"] in ('rt', 'rp')
-            else:
-                return type == "EndTag" or type is None
-        elif tagname == 'colgroup':
-            # A colgroup element's end tag may be omitted if the colgroup
-            # element is not immediately followed by a space character or
-            # a comment.
-            if type in ("Comment", "SpaceCharacters"):
-                return False
-            elif type == "StartTag":
-                # XXX: we also look for an immediately following colgroup
-                # element. See is_optional_start.
-                return next["name"] != 'colgroup'
-            else:
-                return True
-        elif tagname in ('thead', 'tbody'):
-            # A thead element's end tag may be omitted if the thead element
-            # is immediately followed by a tbody or tfoot element.
-            # A tbody element's end tag may be omitted if the tbody element
-            # is immediately followed by a tbody or tfoot element, or if
-            # there is no more content in the parent element.
-            # A tfoot element's end tag may be omitted if the tfoot element
-            # is immediately followed by a tbody element, or if there is no
-            # more content in the parent element.
-            # XXX: we never omit the end tag when the following element is
-            # a tbody. See is_optional_start.
-            if type == "StartTag":
-                return next["name"] in ['tbody', 'tfoot']
-            elif tagname == 'tbody':
-                return type == "EndTag" or type is None
-            else:
-                return False
-        elif tagname == 'tfoot':
-            # A tfoot element's end tag may be omitted if the tfoot element
-            # is immediately followed by a tbody element, or if there is no
-            # more content in the parent element.
-            # XXX: we never omit the end tag when the following element is
-            # a tbody. See is_optional_start.
-            if type == "StartTag":
-                return next["name"] == 'tbody'
-            else:
-                return type == "EndTag" or type is None
-        elif tagname in ('td', 'th'):
-            # A td element's end tag may be omitted if the td element is
-            # immediately followed by a td or th element, or if there is
-            # no more content in the parent element.
-            # A th element's end tag may be omitted if the th element is
-            # immediately followed by a td or th element, or if there is
-            # no more content in the parent element.
-            if type == "StartTag":
-                return next["name"] in ('td', 'th')
-            else:
-                return type == "EndTag" or type is None
-        return False
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/filters/sanitizer.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/filters/sanitizer.py
deleted file mode 100644
index af8e77b..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/filters/sanitizer.py
+++ /dev/null
@@ -1,896 +0,0 @@
-from __future__ import absolute_import, division, unicode_literals
-
-import re
-from xml.sax.saxutils import escape, unescape
-
-from pip._vendor.six.moves import urllib_parse as urlparse
-
-from . import base
-from ..constants import namespaces, prefixes
-
-__all__ = ["Filter"]
-
-
-allowed_elements = frozenset((
-    (namespaces['html'], 'a'),
-    (namespaces['html'], 'abbr'),
-    (namespaces['html'], 'acronym'),
-    (namespaces['html'], 'address'),
-    (namespaces['html'], 'area'),
-    (namespaces['html'], 'article'),
-    (namespaces['html'], 'aside'),
-    (namespaces['html'], 'audio'),
-    (namespaces['html'], 'b'),
-    (namespaces['html'], 'big'),
-    (namespaces['html'], 'blockquote'),
-    (namespaces['html'], 'br'),
-    (namespaces['html'], 'button'),
-    (namespaces['html'], 'canvas'),
-    (namespaces['html'], 'caption'),
-    (namespaces['html'], 'center'),
-    (namespaces['html'], 'cite'),
-    (namespaces['html'], 'code'),
-    (namespaces['html'], 'col'),
-    (namespaces['html'], 'colgroup'),
-    (namespaces['html'], 'command'),
-    (namespaces['html'], 'datagrid'),
-    (namespaces['html'], 'datalist'),
-    (namespaces['html'], 'dd'),
-    (namespaces['html'], 'del'),
-    (namespaces['html'], 'details'),
-    (namespaces['html'], 'dfn'),
-    (namespaces['html'], 'dialog'),
-    (namespaces['html'], 'dir'),
-    (namespaces['html'], 'div'),
-    (namespaces['html'], 'dl'),
-    (namespaces['html'], 'dt'),
-    (namespaces['html'], 'em'),
-    (namespaces['html'], 'event-source'),
-    (namespaces['html'], 'fieldset'),
-    (namespaces['html'], 'figcaption'),
-    (namespaces['html'], 'figure'),
-    (namespaces['html'], 'footer'),
-    (namespaces['html'], 'font'),
-    (namespaces['html'], 'form'),
-    (namespaces['html'], 'header'),
-    (namespaces['html'], 'h1'),
-    (namespaces['html'], 'h2'),
-    (namespaces['html'], 'h3'),
-    (namespaces['html'], 'h4'),
-    (namespaces['html'], 'h5'),
-    (namespaces['html'], 'h6'),
-    (namespaces['html'], 'hr'),
-    (namespaces['html'], 'i'),
-    (namespaces['html'], 'img'),
-    (namespaces['html'], 'input'),
-    (namespaces['html'], 'ins'),
-    (namespaces['html'], 'keygen'),
-    (namespaces['html'], 'kbd'),
-    (namespaces['html'], 'label'),
-    (namespaces['html'], 'legend'),
-    (namespaces['html'], 'li'),
-    (namespaces['html'], 'm'),
-    (namespaces['html'], 'map'),
-    (namespaces['html'], 'menu'),
-    (namespaces['html'], 'meter'),
-    (namespaces['html'], 'multicol'),
-    (namespaces['html'], 'nav'),
-    (namespaces['html'], 'nextid'),
-    (namespaces['html'], 'ol'),
-    (namespaces['html'], 'output'),
-    (namespaces['html'], 'optgroup'),
-    (namespaces['html'], 'option'),
-    (namespaces['html'], 'p'),
-    (namespaces['html'], 'pre'),
-    (namespaces['html'], 'progress'),
-    (namespaces['html'], 'q'),
-    (namespaces['html'], 's'),
-    (namespaces['html'], 'samp'),
-    (namespaces['html'], 'section'),
-    (namespaces['html'], 'select'),
-    (namespaces['html'], 'small'),
-    (namespaces['html'], 'sound'),
-    (namespaces['html'], 'source'),
-    (namespaces['html'], 'spacer'),
-    (namespaces['html'], 'span'),
-    (namespaces['html'], 'strike'),
-    (namespaces['html'], 'strong'),
-    (namespaces['html'], 'sub'),
-    (namespaces['html'], 'sup'),
-    (namespaces['html'], 'table'),
-    (namespaces['html'], 'tbody'),
-    (namespaces['html'], 'td'),
-    (namespaces['html'], 'textarea'),
-    (namespaces['html'], 'time'),
-    (namespaces['html'], 'tfoot'),
-    (namespaces['html'], 'th'),
-    (namespaces['html'], 'thead'),
-    (namespaces['html'], 'tr'),
-    (namespaces['html'], 'tt'),
-    (namespaces['html'], 'u'),
-    (namespaces['html'], 'ul'),
-    (namespaces['html'], 'var'),
-    (namespaces['html'], 'video'),
-    (namespaces['mathml'], 'maction'),
-    (namespaces['mathml'], 'math'),
-    (namespaces['mathml'], 'merror'),
-    (namespaces['mathml'], 'mfrac'),
-    (namespaces['mathml'], 'mi'),
-    (namespaces['mathml'], 'mmultiscripts'),
-    (namespaces['mathml'], 'mn'),
-    (namespaces['mathml'], 'mo'),
-    (namespaces['mathml'], 'mover'),
-    (namespaces['mathml'], 'mpadded'),
-    (namespaces['mathml'], 'mphantom'),
-    (namespaces['mathml'], 'mprescripts'),
-    (namespaces['mathml'], 'mroot'),
-    (namespaces['mathml'], 'mrow'),
-    (namespaces['mathml'], 'mspace'),
-    (namespaces['mathml'], 'msqrt'),
-    (namespaces['mathml'], 'mstyle'),
-    (namespaces['mathml'], 'msub'),
-    (namespaces['mathml'], 'msubsup'),
-    (namespaces['mathml'], 'msup'),
-    (namespaces['mathml'], 'mtable'),
-    (namespaces['mathml'], 'mtd'),
-    (namespaces['mathml'], 'mtext'),
-    (namespaces['mathml'], 'mtr'),
-    (namespaces['mathml'], 'munder'),
-    (namespaces['mathml'], 'munderover'),
-    (namespaces['mathml'], 'none'),
-    (namespaces['svg'], 'a'),
-    (namespaces['svg'], 'animate'),
-    (namespaces['svg'], 'animateColor'),
-    (namespaces['svg'], 'animateMotion'),
-    (namespaces['svg'], 'animateTransform'),
-    (namespaces['svg'], 'clipPath'),
-    (namespaces['svg'], 'circle'),
-    (namespaces['svg'], 'defs'),
-    (namespaces['svg'], 'desc'),
-    (namespaces['svg'], 'ellipse'),
-    (namespaces['svg'], 'font-face'),
-    (namespaces['svg'], 'font-face-name'),
-    (namespaces['svg'], 'font-face-src'),
-    (namespaces['svg'], 'g'),
-    (namespaces['svg'], 'glyph'),
-    (namespaces['svg'], 'hkern'),
-    (namespaces['svg'], 'linearGradient'),
-    (namespaces['svg'], 'line'),
-    (namespaces['svg'], 'marker'),
-    (namespaces['svg'], 'metadata'),
-    (namespaces['svg'], 'missing-glyph'),
-    (namespaces['svg'], 'mpath'),
-    (namespaces['svg'], 'path'),
-    (namespaces['svg'], 'polygon'),
-    (namespaces['svg'], 'polyline'),
-    (namespaces['svg'], 'radialGradient'),
-    (namespaces['svg'], 'rect'),
-    (namespaces['svg'], 'set'),
-    (namespaces['svg'], 'stop'),
-    (namespaces['svg'], 'svg'),
-    (namespaces['svg'], 'switch'),
-    (namespaces['svg'], 'text'),
-    (namespaces['svg'], 'title'),
-    (namespaces['svg'], 'tspan'),
-    (namespaces['svg'], 'use'),
-))
-
-allowed_attributes = frozenset((
-    # HTML attributes
-    (None, 'abbr'),
-    (None, 'accept'),
-    (None, 'accept-charset'),
-    (None, 'accesskey'),
-    (None, 'action'),
-    (None, 'align'),
-    (None, 'alt'),
-    (None, 'autocomplete'),
-    (None, 'autofocus'),
-    (None, 'axis'),
-    (None, 'background'),
-    (None, 'balance'),
-    (None, 'bgcolor'),
-    (None, 'bgproperties'),
-    (None, 'border'),
-    (None, 'bordercolor'),
-    (None, 'bordercolordark'),
-    (None, 'bordercolorlight'),
-    (None, 'bottompadding'),
-    (None, 'cellpadding'),
-    (None, 'cellspacing'),
-    (None, 'ch'),
-    (None, 'challenge'),
-    (None, 'char'),
-    (None, 'charoff'),
-    (None, 'choff'),
-    (None, 'charset'),
-    (None, 'checked'),
-    (None, 'cite'),
-    (None, 'class'),
-    (None, 'clear'),
-    (None, 'color'),
-    (None, 'cols'),
-    (None, 'colspan'),
-    (None, 'compact'),
-    (None, 'contenteditable'),
-    (None, 'controls'),
-    (None, 'coords'),
-    (None, 'data'),
-    (None, 'datafld'),
-    (None, 'datapagesize'),
-    (None, 'datasrc'),
-    (None, 'datetime'),
-    (None, 'default'),
-    (None, 'delay'),
-    (None, 'dir'),
-    (None, 'disabled'),
-    (None, 'draggable'),
-    (None, 'dynsrc'),
-    (None, 'enctype'),
-    (None, 'end'),
-    (None, 'face'),
-    (None, 'for'),
-    (None, 'form'),
-    (None, 'frame'),
-    (None, 'galleryimg'),
-    (None, 'gutter'),
-    (None, 'headers'),
-    (None, 'height'),
-    (None, 'hidefocus'),
-    (None, 'hidden'),
-    (None, 'high'),
-    (None, 'href'),
-    (None, 'hreflang'),
-    (None, 'hspace'),
-    (None, 'icon'),
-    (None, 'id'),
-    (None, 'inputmode'),
-    (None, 'ismap'),
-    (None, 'keytype'),
-    (None, 'label'),
-    (None, 'leftspacing'),
-    (None, 'lang'),
-    (None, 'list'),
-    (None, 'longdesc'),
-    (None, 'loop'),
-    (None, 'loopcount'),
-    (None, 'loopend'),
-    (None, 'loopstart'),
-    (None, 'low'),
-    (None, 'lowsrc'),
-    (None, 'max'),
-    (None, 'maxlength'),
-    (None, 'media'),
-    (None, 'method'),
-    (None, 'min'),
-    (None, 'multiple'),
-    (None, 'name'),
-    (None, 'nohref'),
-    (None, 'noshade'),
-    (None, 'nowrap'),
-    (None, 'open'),
-    (None, 'optimum'),
-    (None, 'pattern'),
-    (None, 'ping'),
-    (None, 'point-size'),
-    (None, 'poster'),
-    (None, 'pqg'),
-    (None, 'preload'),
-    (None, 'prompt'),
-    (None, 'radiogroup'),
-    (None, 'readonly'),
-    (None, 'rel'),
-    (None, 'repeat-max'),
-    (None, 'repeat-min'),
-    (None, 'replace'),
-    (None, 'required'),
-    (None, 'rev'),
-    (None, 'rightspacing'),
-    (None, 'rows'),
-    (None, 'rowspan'),
-    (None, 'rules'),
-    (None, 'scope'),
-    (None, 'selected'),
-    (None, 'shape'),
-    (None, 'size'),
-    (None, 'span'),
-    (None, 'src'),
-    (None, 'start'),
-    (None, 'step'),
-    (None, 'style'),
-    (None, 'summary'),
-    (None, 'suppress'),
-    (None, 'tabindex'),
-    (None, 'target'),
-    (None, 'template'),
-    (None, 'title'),
-    (None, 'toppadding'),
-    (None, 'type'),
-    (None, 'unselectable'),
-    (None, 'usemap'),
-    (None, 'urn'),
-    (None, 'valign'),
-    (None, 'value'),
-    (None, 'variable'),
-    (None, 'volume'),
-    (None, 'vspace'),
-    (None, 'vrml'),
-    (None, 'width'),
-    (None, 'wrap'),
-    (namespaces['xml'], 'lang'),
-    # MathML attributes
-    (None, 'actiontype'),
-    (None, 'align'),
-    (None, 'columnalign'),
-    (None, 'columnalign'),
-    (None, 'columnalign'),
-    (None, 'columnlines'),
-    (None, 'columnspacing'),
-    (None, 'columnspan'),
-    (None, 'depth'),
-    (None, 'display'),
-    (None, 'displaystyle'),
-    (None, 'equalcolumns'),
-    (None, 'equalrows'),
-    (None, 'fence'),
-    (None, 'fontstyle'),
-    (None, 'fontweight'),
-    (None, 'frame'),
-    (None, 'height'),
-    (None, 'linethickness'),
-    (None, 'lspace'),
-    (None, 'mathbackground'),
-    (None, 'mathcolor'),
-    (None, 'mathvariant'),
-    (None, 'mathvariant'),
-    (None, 'maxsize'),
-    (None, 'minsize'),
-    (None, 'other'),
-    (None, 'rowalign'),
-    (None, 'rowalign'),
-    (None, 'rowalign'),
-    (None, 'rowlines'),
-    (None, 'rowspacing'),
-    (None, 'rowspan'),
-    (None, 'rspace'),
-    (None, 'scriptlevel'),
-    (None, 'selection'),
-    (None, 'separator'),
-    (None, 'stretchy'),
-    (None, 'width'),
-    (None, 'width'),
-    (namespaces['xlink'], 'href'),
-    (namespaces['xlink'], 'show'),
-    (namespaces['xlink'], 'type'),
-    # SVG attributes
-    (None, 'accent-height'),
-    (None, 'accumulate'),
-    (None, 'additive'),
-    (None, 'alphabetic'),
-    (None, 'arabic-form'),
-    (None, 'ascent'),
-    (None, 'attributeName'),
-    (None, 'attributeType'),
-    (None, 'baseProfile'),
-    (None, 'bbox'),
-    (None, 'begin'),
-    (None, 'by'),
-    (None, 'calcMode'),
-    (None, 'cap-height'),
-    (None, 'class'),
-    (None, 'clip-path'),
-    (None, 'color'),
-    (None, 'color-rendering'),
-    (None, 'content'),
-    (None, 'cx'),
-    (None, 'cy'),
-    (None, 'd'),
-    (None, 'dx'),
-    (None, 'dy'),
-    (None, 'descent'),
-    (None, 'display'),
-    (None, 'dur'),
-    (None, 'end'),
-    (None, 'fill'),
-    (None, 'fill-opacity'),
-    (None, 'fill-rule'),
-    (None, 'font-family'),
-    (None, 'font-size'),
-    (None, 'font-stretch'),
-    (None, 'font-style'),
-    (None, 'font-variant'),
-    (None, 'font-weight'),
-    (None, 'from'),
-    (None, 'fx'),
-    (None, 'fy'),
-    (None, 'g1'),
-    (None, 'g2'),
-    (None, 'glyph-name'),
-    (None, 'gradientUnits'),
-    (None, 'hanging'),
-    (None, 'height'),
-    (None, 'horiz-adv-x'),
-    (None, 'horiz-origin-x'),
-    (None, 'id'),
-    (None, 'ideographic'),
-    (None, 'k'),
-    (None, 'keyPoints'),
-    (None, 'keySplines'),
-    (None, 'keyTimes'),
-    (None, 'lang'),
-    (None, 'marker-end'),
-    (None, 'marker-mid'),
-    (None, 'marker-start'),
-    (None, 'markerHeight'),
-    (None, 'markerUnits'),
-    (None, 'markerWidth'),
-    (None, 'mathematical'),
-    (None, 'max'),
-    (None, 'min'),
-    (None, 'name'),
-    (None, 'offset'),
-    (None, 'opacity'),
-    (None, 'orient'),
-    (None, 'origin'),
-    (None, 'overline-position'),
-    (None, 'overline-thickness'),
-    (None, 'panose-1'),
-    (None, 'path'),
-    (None, 'pathLength'),
-    (None, 'points'),
-    (None, 'preserveAspectRatio'),
-    (None, 'r'),
-    (None, 'refX'),
-    (None, 'refY'),
-    (None, 'repeatCount'),
-    (None, 'repeatDur'),
-    (None, 'requiredExtensions'),
-    (None, 'requiredFeatures'),
-    (None, 'restart'),
-    (None, 'rotate'),
-    (None, 'rx'),
-    (None, 'ry'),
-    (None, 'slope'),
-    (None, 'stemh'),
-    (None, 'stemv'),
-    (None, 'stop-color'),
-    (None, 'stop-opacity'),
-    (None, 'strikethrough-position'),
-    (None, 'strikethrough-thickness'),
-    (None, 'stroke'),
-    (None, 'stroke-dasharray'),
-    (None, 'stroke-dashoffset'),
-    (None, 'stroke-linecap'),
-    (None, 'stroke-linejoin'),
-    (None, 'stroke-miterlimit'),
-    (None, 'stroke-opacity'),
-    (None, 'stroke-width'),
-    (None, 'systemLanguage'),
-    (None, 'target'),
-    (None, 'text-anchor'),
-    (None, 'to'),
-    (None, 'transform'),
-    (None, 'type'),
-    (None, 'u1'),
-    (None, 'u2'),
-    (None, 'underline-position'),
-    (None, 'underline-thickness'),
-    (None, 'unicode'),
-    (None, 'unicode-range'),
-    (None, 'units-per-em'),
-    (None, 'values'),
-    (None, 'version'),
-    (None, 'viewBox'),
-    (None, 'visibility'),
-    (None, 'width'),
-    (None, 'widths'),
-    (None, 'x'),
-    (None, 'x-height'),
-    (None, 'x1'),
-    (None, 'x2'),
-    (namespaces['xlink'], 'actuate'),
-    (namespaces['xlink'], 'arcrole'),
-    (namespaces['xlink'], 'href'),
-    (namespaces['xlink'], 'role'),
-    (namespaces['xlink'], 'show'),
-    (namespaces['xlink'], 'title'),
-    (namespaces['xlink'], 'type'),
-    (namespaces['xml'], 'base'),
-    (namespaces['xml'], 'lang'),
-    (namespaces['xml'], 'space'),
-    (None, 'y'),
-    (None, 'y1'),
-    (None, 'y2'),
-    (None, 'zoomAndPan'),
-))
-
-attr_val_is_uri = frozenset((
-    (None, 'href'),
-    (None, 'src'),
-    (None, 'cite'),
-    (None, 'action'),
-    (None, 'longdesc'),
-    (None, 'poster'),
-    (None, 'background'),
-    (None, 'datasrc'),
-    (None, 'dynsrc'),
-    (None, 'lowsrc'),
-    (None, 'ping'),
-    (namespaces['xlink'], 'href'),
-    (namespaces['xml'], 'base'),
-))
-
-svg_attr_val_allows_ref = frozenset((
-    (None, 'clip-path'),
-    (None, 'color-profile'),
-    (None, 'cursor'),
-    (None, 'fill'),
-    (None, 'filter'),
-    (None, 'marker'),
-    (None, 'marker-start'),
-    (None, 'marker-mid'),
-    (None, 'marker-end'),
-    (None, 'mask'),
-    (None, 'stroke'),
-))
-
-svg_allow_local_href = frozenset((
-    (None, 'altGlyph'),
-    (None, 'animate'),
-    (None, 'animateColor'),
-    (None, 'animateMotion'),
-    (None, 'animateTransform'),
-    (None, 'cursor'),
-    (None, 'feImage'),
-    (None, 'filter'),
-    (None, 'linearGradient'),
-    (None, 'pattern'),
-    (None, 'radialGradient'),
-    (None, 'textpath'),
-    (None, 'tref'),
-    (None, 'set'),
-    (None, 'use')
-))
-
-allowed_css_properties = frozenset((
-    'azimuth',
-    'background-color',
-    'border-bottom-color',
-    'border-collapse',
-    'border-color',
-    'border-left-color',
-    'border-right-color',
-    'border-top-color',
-    'clear',
-    'color',
-    'cursor',
-    'direction',
-    'display',
-    'elevation',
-    'float',
-    'font',
-    'font-family',
-    'font-size',
-    'font-style',
-    'font-variant',
-    'font-weight',
-    'height',
-    'letter-spacing',
-    'line-height',
-    'overflow',
-    'pause',
-    'pause-after',
-    'pause-before',
-    'pitch',
-    'pitch-range',
-    'richness',
-    'speak',
-    'speak-header',
-    'speak-numeral',
-    'speak-punctuation',
-    'speech-rate',
-    'stress',
-    'text-align',
-    'text-decoration',
-    'text-indent',
-    'unicode-bidi',
-    'vertical-align',
-    'voice-family',
-    'volume',
-    'white-space',
-    'width',
-))
-
-allowed_css_keywords = frozenset((
-    'auto',
-    'aqua',
-    'black',
-    'block',
-    'blue',
-    'bold',
-    'both',
-    'bottom',
-    'brown',
-    'center',
-    'collapse',
-    'dashed',
-    'dotted',
-    'fuchsia',
-    'gray',
-    'green',
-    '!important',
-    'italic',
-    'left',
-    'lime',
-    'maroon',
-    'medium',
-    'none',
-    'navy',
-    'normal',
-    'nowrap',
-    'olive',
-    'pointer',
-    'purple',
-    'red',
-    'right',
-    'solid',
-    'silver',
-    'teal',
-    'top',
-    'transparent',
-    'underline',
-    'white',
-    'yellow',
-))
-
-allowed_svg_properties = frozenset((
-    'fill',
-    'fill-opacity',
-    'fill-rule',
-    'stroke',
-    'stroke-width',
-    'stroke-linecap',
-    'stroke-linejoin',
-    'stroke-opacity',
-))
-
-allowed_protocols = frozenset((
-    'ed2k',
-    'ftp',
-    'http',
-    'https',
-    'irc',
-    'mailto',
-    'news',
-    'gopher',
-    'nntp',
-    'telnet',
-    'webcal',
-    'xmpp',
-    'callto',
-    'feed',
-    'urn',
-    'aim',
-    'rsync',
-    'tag',
-    'ssh',
-    'sftp',
-    'rtsp',
-    'afs',
-    'data',
-))
-
-allowed_content_types = frozenset((
-    'image/png',
-    'image/jpeg',
-    'image/gif',
-    'image/webp',
-    'image/bmp',
-    'text/plain',
-))
-
-
-data_content_type = re.compile(r'''
-                                ^
-                                # Match a content type <application>/<type>
-                                (?P<content_type>[-a-zA-Z0-9.]+/[-a-zA-Z0-9.]+)
-                                # Match any character set and encoding
-                                (?:(?:;charset=(?:[-a-zA-Z0-9]+)(?:;(?:base64))?)
-                                  |(?:;(?:base64))?(?:;charset=(?:[-a-zA-Z0-9]+))?)
-                                # Assume the rest is data
-                                ,.*
-                                $
-                                ''',
-                               re.VERBOSE)
-
-
-class Filter(base.Filter):
-    """Sanitizes token stream of XHTML+MathML+SVG and of inline style attributes"""
-    def __init__(self,
-                 source,
-                 allowed_elements=allowed_elements,
-                 allowed_attributes=allowed_attributes,
-                 allowed_css_properties=allowed_css_properties,
-                 allowed_css_keywords=allowed_css_keywords,
-                 allowed_svg_properties=allowed_svg_properties,
-                 allowed_protocols=allowed_protocols,
-                 allowed_content_types=allowed_content_types,
-                 attr_val_is_uri=attr_val_is_uri,
-                 svg_attr_val_allows_ref=svg_attr_val_allows_ref,
-                 svg_allow_local_href=svg_allow_local_href):
-        """Creates a Filter
-
-        :arg allowed_elements: set of elements to allow--everything else will
-            be escaped
-
-        :arg allowed_attributes: set of attributes to allow in
-            elements--everything else will be stripped
-
-        :arg allowed_css_properties: set of CSS properties to allow--everything
-            else will be stripped
-
-        :arg allowed_css_keywords: set of CSS keywords to allow--everything
-            else will be stripped
-
-        :arg allowed_svg_properties: set of SVG properties to allow--everything
-            else will be removed
-
-        :arg allowed_protocols: set of allowed protocols for URIs
-
-        :arg allowed_content_types: set of allowed content types for ``data`` URIs.
-
-        :arg attr_val_is_uri: set of attributes that have URI values--values
-            that have a scheme not listed in ``allowed_protocols`` are removed
-
-        :arg svg_attr_val_allows_ref: set of SVG attributes that can have
-            references
-
-        :arg svg_allow_local_href: set of SVG elements that can have local
-            hrefs--these are removed
-
-        """
-        super(Filter, self).__init__(source)
-        self.allowed_elements = allowed_elements
-        self.allowed_attributes = allowed_attributes
-        self.allowed_css_properties = allowed_css_properties
-        self.allowed_css_keywords = allowed_css_keywords
-        self.allowed_svg_properties = allowed_svg_properties
-        self.allowed_protocols = allowed_protocols
-        self.allowed_content_types = allowed_content_types
-        self.attr_val_is_uri = attr_val_is_uri
-        self.svg_attr_val_allows_ref = svg_attr_val_allows_ref
-        self.svg_allow_local_href = svg_allow_local_href
-
-    def __iter__(self):
-        for token in base.Filter.__iter__(self):
-            token = self.sanitize_token(token)
-            if token:
-                yield token
-
-    # Sanitize the +html+, escaping all elements not in ALLOWED_ELEMENTS, and
-    # stripping out all attributes not in ALLOWED_ATTRIBUTES. Style attributes
-    # are parsed, and a restricted set, specified by ALLOWED_CSS_PROPERTIES and
-    # ALLOWED_CSS_KEYWORDS, are allowed through. attributes in ATTR_VAL_IS_URI
-    # are scanned, and only URI schemes specified in ALLOWED_PROTOCOLS are
-    # allowed.
-    #
-    #   sanitize_html('<script> do_nasty_stuff() </script>')
-    #    => &lt;script> do_nasty_stuff() &lt;/script>
-    #   sanitize_html('<a href="javascript: sucker();">Click here for $100</a>')
-    #    => <a>Click here for $100</a>
-    def sanitize_token(self, token):
-
-        # accommodate filters which use token_type differently
-        token_type = token["type"]
-        if token_type in ("StartTag", "EndTag", "EmptyTag"):
-            name = token["name"]
-            namespace = token["namespace"]
-            if ((namespace, name) in self.allowed_elements or
-                (namespace is None and
-                 (namespaces["html"], name) in self.allowed_elements)):
-                return self.allowed_token(token)
-            else:
-                return self.disallowed_token(token)
-        elif token_type == "Comment":
-            pass
-        else:
-            return token
-
-    def allowed_token(self, token):
-        if "data" in token:
-            attrs = token["data"]
-            attr_names = set(attrs.keys())
-
-            # Remove forbidden attributes
-            for to_remove in (attr_names - self.allowed_attributes):
-                del token["data"][to_remove]
-                attr_names.remove(to_remove)
-
-            # Remove attributes with disallowed URL values
-            for attr in (attr_names & self.attr_val_is_uri):
-                assert attr in attrs
-                # I don't have a clue where this regexp comes from or why it matches those
-                # characters, nor why we call unescape. I just know it's always been here.
-                # Should you be worried by this comment in a sanitizer? Yes. On the other hand, all
-                # this will do is remove *more* than it otherwise would.
-                val_unescaped = re.sub("[`\x00-\x20\x7f-\xa0\\s]+", '',
-                                       unescape(attrs[attr])).lower()
-                # remove replacement characters from unescaped characters
-                val_unescaped = val_unescaped.replace("\ufffd", "")
-                try:
-                    uri = urlparse.urlparse(val_unescaped)
-                except ValueError:
-                    uri = None
-                    del attrs[attr]
-                if uri and uri.scheme:
-                    if uri.scheme not in self.allowed_protocols:
-                        del attrs[attr]
-                    if uri.scheme == 'data':
-                        m = data_content_type.match(uri.path)
-                        if not m:
-                            del attrs[attr]
-                        elif m.group('content_type') not in self.allowed_content_types:
-                            del attrs[attr]
-
-            for attr in self.svg_attr_val_allows_ref:
-                if attr in attrs:
-                    attrs[attr] = re.sub(r'url\s*\(\s*[^#\s][^)]+?\)',
-                                         ' ',
-                                         unescape(attrs[attr]))
-            if (token["name"] in self.svg_allow_local_href and
-                (namespaces['xlink'], 'href') in attrs and re.search(r'^\s*[^#\s].*',
-                                                                     attrs[(namespaces['xlink'], 'href')])):
-                del attrs[(namespaces['xlink'], 'href')]
-            if (None, 'style') in attrs:
-                attrs[(None, 'style')] = self.sanitize_css(attrs[(None, 'style')])
-            token["data"] = attrs
-        return token
-
-    def disallowed_token(self, token):
-        token_type = token["type"]
-        if token_type == "EndTag":
-            token["data"] = "</%s>" % token["name"]
-        elif token["data"]:
-            assert token_type in ("StartTag", "EmptyTag")
-            attrs = []
-            for (ns, name), v in token["data"].items():
-                attrs.append(' %s="%s"' % (name if ns is None else "%s:%s" % (prefixes[ns], name), escape(v)))
-            token["data"] = "<%s%s>" % (token["name"], ''.join(attrs))
-        else:
-            token["data"] = "<%s>" % token["name"]
-        if token.get("selfClosing"):
-            token["data"] = token["data"][:-1] + "/>"
-
-        token["type"] = "Characters"
-
-        del token["name"]
-        return token
-
-    def sanitize_css(self, style):
-        # disallow urls
-        style = re.compile(r'url\s*\(\s*[^\s)]+?\s*\)\s*').sub(' ', style)
-
-        # gauntlet
-        if not re.match(r"""^([:,;#%.\sa-zA-Z0-9!]|\w-\w|'[\s\w]+'|"[\s\w]+"|\([\d,\s]+\))*$""", style):
-            return ''
-        if not re.match(r"^\s*([-\w]+\s*:[^:;]*(;\s*|$))*$", style):
-            return ''
-
-        clean = []
-        for prop, value in re.findall(r"([-\w]+)\s*:\s*([^:;]*)", style):
-            if not value:
-                continue
-            if prop.lower() in self.allowed_css_properties:
-                clean.append(prop + ': ' + value + ';')
-            elif prop.split('-')[0].lower() in ['background', 'border', 'margin',
-                                                'padding']:
-                for keyword in value.split():
-                    if keyword not in self.allowed_css_keywords and \
-                            not re.match(r"^(#[0-9a-fA-F]+|rgb\(\d+%?,\d*%?,?\d*%?\)?|\d{0,2}\.?\d{0,2}(cm|em|ex|in|mm|pc|pt|px|%|,|\))?)$", keyword):  # noqa
-                        break
-                else:
-                    clean.append(prop + ': ' + value + ';')
-            elif prop.lower() in self.allowed_svg_properties:
-                clean.append(prop + ': ' + value + ';')
-
-        return ' '.join(clean)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/filters/whitespace.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/filters/whitespace.py
deleted file mode 100644
index 0d12584..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/filters/whitespace.py
+++ /dev/null
@@ -1,38 +0,0 @@
-from __future__ import absolute_import, division, unicode_literals
-
-import re
-
-from . import base
-from ..constants import rcdataElements, spaceCharacters
-spaceCharacters = "".join(spaceCharacters)
-
-SPACES_REGEX = re.compile("[%s]+" % spaceCharacters)
-
-
-class Filter(base.Filter):
-    """Collapses whitespace except in pre, textarea, and script elements"""
-    spacePreserveElements = frozenset(["pre", "textarea"] + list(rcdataElements))
-
-    def __iter__(self):
-        preserve = 0
-        for token in base.Filter.__iter__(self):
-            type = token["type"]
-            if type == "StartTag" \
-                    and (preserve or token["name"] in self.spacePreserveElements):
-                preserve += 1
-
-            elif type == "EndTag" and preserve:
-                preserve -= 1
-
-            elif not preserve and type == "SpaceCharacters" and token["data"]:
-                # Test on token["data"] above to not introduce spaces where there were not
-                token["data"] = " "
-
-            elif not preserve and type == "Characters":
-                token["data"] = collapse_spaces(token["data"])
-
-            yield token
-
-
-def collapse_spaces(text):
-    return SPACES_REGEX.sub(' ', text)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/html5parser.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/html5parser.py
deleted file mode 100644
index ae41a13..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/html5parser.py
+++ /dev/null
@@ -1,2791 +0,0 @@
-from __future__ import absolute_import, division, unicode_literals
-from pip._vendor.six import with_metaclass, viewkeys
-
-import types
-from collections import OrderedDict
-
-from . import _inputstream
-from . import _tokenizer
-
-from . import treebuilders
-from .treebuilders.base import Marker
-
-from . import _utils
-from .constants import (
-    spaceCharacters, asciiUpper2Lower,
-    specialElements, headingElements, cdataElements, rcdataElements,
-    tokenTypes, tagTokenTypes,
-    namespaces,
-    htmlIntegrationPointElements, mathmlTextIntegrationPointElements,
-    adjustForeignAttributes as adjustForeignAttributesMap,
-    adjustMathMLAttributes, adjustSVGAttributes,
-    E,
-    _ReparseException
-)
-
-
-def parse(doc, treebuilder="etree", namespaceHTMLElements=True, **kwargs):
-    """Parse an HTML document as a string or file-like object into a tree
-
-    :arg doc: the document to parse as a string or file-like object
-
-    :arg treebuilder: the treebuilder to use when parsing
-
-    :arg namespaceHTMLElements: whether or not to namespace HTML elements
-
-    :returns: parsed tree
-
-    Example:
-
-    >>> from html5lib.html5parser import parse
-    >>> parse('<html><body><p>This is a doc</p></body></html>')
-    <Element u'{http://www.w3.org/1999/xhtml}html' at 0x7feac4909db0>
-
-    """
-    tb = treebuilders.getTreeBuilder(treebuilder)
-    p = HTMLParser(tb, namespaceHTMLElements=namespaceHTMLElements)
-    return p.parse(doc, **kwargs)
-
-
-def parseFragment(doc, container="div", treebuilder="etree", namespaceHTMLElements=True, **kwargs):
-    """Parse an HTML fragment as a string or file-like object into a tree
-
-    :arg doc: the fragment to parse as a string or file-like object
-
-    :arg container: the container context to parse the fragment in
-
-    :arg treebuilder: the treebuilder to use when parsing
-
-    :arg namespaceHTMLElements: whether or not to namespace HTML elements
-
-    :returns: parsed tree
-
-    Example:
-
-    >>> from html5lib.html5libparser import parseFragment
-    >>> parseFragment('<b>this is a fragment</b>')
-    <Element u'DOCUMENT_FRAGMENT' at 0x7feac484b090>
-
-    """
-    tb = treebuilders.getTreeBuilder(treebuilder)
-    p = HTMLParser(tb, namespaceHTMLElements=namespaceHTMLElements)
-    return p.parseFragment(doc, container=container, **kwargs)
-
-
-def method_decorator_metaclass(function):
-    class Decorated(type):
-        def __new__(meta, classname, bases, classDict):
-            for attributeName, attribute in classDict.items():
-                if isinstance(attribute, types.FunctionType):
-                    attribute = function(attribute)
-
-                classDict[attributeName] = attribute
-            return type.__new__(meta, classname, bases, classDict)
-    return Decorated
-
-
-class HTMLParser(object):
-    """HTML parser
-
-    Generates a tree structure from a stream of (possibly malformed) HTML.
-
-    """
-
-    def __init__(self, tree=None, strict=False, namespaceHTMLElements=True, debug=False):
-        """
-        :arg tree: a treebuilder class controlling the type of tree that will be
-            returned. Built in treebuilders can be accessed through
-            html5lib.treebuilders.getTreeBuilder(treeType)
-
-        :arg strict: raise an exception when a parse error is encountered
-
-        :arg namespaceHTMLElements: whether or not to namespace HTML elements
-
-        :arg debug: whether or not to enable debug mode which logs things
-
-        Example:
-
-        >>> from html5lib.html5parser import HTMLParser
-        >>> parser = HTMLParser()                     # generates parser with etree builder
-        >>> parser = HTMLParser('lxml', strict=True)  # generates parser with lxml builder which is strict
-
-        """
-
-        # Raise an exception on the first error encountered
-        self.strict = strict
-
-        if tree is None:
-            tree = treebuilders.getTreeBuilder("etree")
-        self.tree = tree(namespaceHTMLElements)
-        self.errors = []
-
-        self.phases = dict([(name, cls(self, self.tree)) for name, cls in
-                            getPhases(debug).items()])
-
-    def _parse(self, stream, innerHTML=False, container="div", scripting=False, **kwargs):
-
-        self.innerHTMLMode = innerHTML
-        self.container = container
-        self.scripting = scripting
-        self.tokenizer = _tokenizer.HTMLTokenizer(stream, parser=self, **kwargs)
-        self.reset()
-
-        try:
-            self.mainLoop()
-        except _ReparseException:
-            self.reset()
-            self.mainLoop()
-
-    def reset(self):
-        self.tree.reset()
-        self.firstStartTag = False
-        self.errors = []
-        self.log = []  # only used with debug mode
-        # "quirks" / "limited quirks" / "no quirks"
-        self.compatMode = "no quirks"
-
-        if self.innerHTMLMode:
-            self.innerHTML = self.container.lower()
-
-            if self.innerHTML in cdataElements:
-                self.tokenizer.state = self.tokenizer.rcdataState
-            elif self.innerHTML in rcdataElements:
-                self.tokenizer.state = self.tokenizer.rawtextState
-            elif self.innerHTML == 'plaintext':
-                self.tokenizer.state = self.tokenizer.plaintextState
-            else:
-                # state already is data state
-                # self.tokenizer.state = self.tokenizer.dataState
-                pass
-            self.phase = self.phases["beforeHtml"]
-            self.phase.insertHtmlElement()
-            self.resetInsertionMode()
-        else:
-            self.innerHTML = False  # pylint:disable=redefined-variable-type
-            self.phase = self.phases["initial"]
-
-        self.lastPhase = None
-
-        self.beforeRCDataPhase = None
-
-        self.framesetOK = True
-
-    @property
-    def documentEncoding(self):
-        """Name of the character encoding that was used to decode the input stream, or
-        :obj:`None` if that is not determined yet
-
-        """
-        if not hasattr(self, 'tokenizer'):
-            return None
-        return self.tokenizer.stream.charEncoding[0].name
-
-    def isHTMLIntegrationPoint(self, element):
-        if (element.name == "annotation-xml" and
-                element.namespace == namespaces["mathml"]):
-            return ("encoding" in element.attributes and
-                    element.attributes["encoding"].translate(
-                        asciiUpper2Lower) in
-                    ("text/html", "application/xhtml+xml"))
-        else:
-            return (element.namespace, element.name) in htmlIntegrationPointElements
-
-    def isMathMLTextIntegrationPoint(self, element):
-        return (element.namespace, element.name) in mathmlTextIntegrationPointElements
-
-    def mainLoop(self):
-        CharactersToken = tokenTypes["Characters"]
-        SpaceCharactersToken = tokenTypes["SpaceCharacters"]
-        StartTagToken = tokenTypes["StartTag"]
-        EndTagToken = tokenTypes["EndTag"]
-        CommentToken = tokenTypes["Comment"]
-        DoctypeToken = tokenTypes["Doctype"]
-        ParseErrorToken = tokenTypes["ParseError"]
-
-        for token in self.normalizedTokens():
-            prev_token = None
-            new_token = token
-            while new_token is not None:
-                prev_token = new_token
-                currentNode = self.tree.openElements[-1] if self.tree.openElements else None
-                currentNodeNamespace = currentNode.namespace if currentNode else None
-                currentNodeName = currentNode.name if currentNode else None
-
-                type = new_token["type"]
-
-                if type == ParseErrorToken:
-                    self.parseError(new_token["data"], new_token.get("datavars", {}))
-                    new_token = None
-                else:
-                    if (len(self.tree.openElements) == 0 or
-                        currentNodeNamespace == self.tree.defaultNamespace or
-                        (self.isMathMLTextIntegrationPoint(currentNode) and
-                         ((type == StartTagToken and
-                           token["name"] not in frozenset(["mglyph", "malignmark"])) or
-                          type in (CharactersToken, SpaceCharactersToken))) or
-                        (currentNodeNamespace == namespaces["mathml"] and
-                         currentNodeName == "annotation-xml" and
-                         type == StartTagToken and
-                         token["name"] == "svg") or
-                        (self.isHTMLIntegrationPoint(currentNode) and
-                         type in (StartTagToken, CharactersToken, SpaceCharactersToken))):
-                        phase = self.phase
-                    else:
-                        phase = self.phases["inForeignContent"]
-
-                    if type == CharactersToken:
-                        new_token = phase.processCharacters(new_token)
-                    elif type == SpaceCharactersToken:
-                        new_token = phase.processSpaceCharacters(new_token)
-                    elif type == StartTagToken:
-                        new_token = phase.processStartTag(new_token)
-                    elif type == EndTagToken:
-                        new_token = phase.processEndTag(new_token)
-                    elif type == CommentToken:
-                        new_token = phase.processComment(new_token)
-                    elif type == DoctypeToken:
-                        new_token = phase.processDoctype(new_token)
-
-            if (type == StartTagToken and prev_token["selfClosing"] and
-                    not prev_token["selfClosingAcknowledged"]):
-                self.parseError("non-void-element-with-trailing-solidus",
-                                {"name": prev_token["name"]})
-
-        # When the loop finishes it's EOF
-        reprocess = True
-        phases = []
-        while reprocess:
-            phases.append(self.phase)
-            reprocess = self.phase.processEOF()
-            if reprocess:
-                assert self.phase not in phases
-
-    def normalizedTokens(self):
-        for token in self.tokenizer:
-            yield self.normalizeToken(token)
-
-    def parse(self, stream, *args, **kwargs):
-        """Parse a HTML document into a well-formed tree
-
-        :arg stream: a file-like object or string containing the HTML to be parsed
-
-            The optional encoding parameter must be a string that indicates
-            the encoding.  If specified, that encoding will be used,
-            regardless of any BOM or later declaration (such as in a meta
-            element).
-
-        :arg scripting: treat noscript elements as if JavaScript was turned on
-
-        :returns: parsed tree
-
-        Example:
-
-        >>> from html5lib.html5parser import HTMLParser
-        >>> parser = HTMLParser()
-        >>> parser.parse('<html><body><p>This is a doc</p></body></html>')
-        <Element u'{http://www.w3.org/1999/xhtml}html' at 0x7feac4909db0>
-
-        """
-        self._parse(stream, False, None, *args, **kwargs)
-        return self.tree.getDocument()
-
-    def parseFragment(self, stream, *args, **kwargs):
-        """Parse a HTML fragment into a well-formed tree fragment
-
-        :arg container: name of the element we're setting the innerHTML
-            property if set to None, default to 'div'
-
-        :arg stream: a file-like object or string containing the HTML to be parsed
-
-            The optional encoding parameter must be a string that indicates
-            the encoding.  If specified, that encoding will be used,
-            regardless of any BOM or later declaration (such as in a meta
-            element)
-
-        :arg scripting: treat noscript elements as if JavaScript was turned on
-
-        :returns: parsed tree
-
-        Example:
-
-        >>> from html5lib.html5libparser import HTMLParser
-        >>> parser = HTMLParser()
-        >>> parser.parseFragment('<b>this is a fragment</b>')
-        <Element u'DOCUMENT_FRAGMENT' at 0x7feac484b090>
-
-        """
-        self._parse(stream, True, *args, **kwargs)
-        return self.tree.getFragment()
-
-    def parseError(self, errorcode="XXX-undefined-error", datavars=None):
-        # XXX The idea is to make errorcode mandatory.
-        if datavars is None:
-            datavars = {}
-        self.errors.append((self.tokenizer.stream.position(), errorcode, datavars))
-        if self.strict:
-            raise ParseError(E[errorcode] % datavars)
-
-    def normalizeToken(self, token):
-        # HTML5 specific normalizations to the token stream
-        if token["type"] == tokenTypes["StartTag"]:
-            raw = token["data"]
-            token["data"] = OrderedDict(raw)
-            if len(raw) > len(token["data"]):
-                # we had some duplicated attribute, fix so first wins
-                token["data"].update(raw[::-1])
-
-        return token
-
-    def adjustMathMLAttributes(self, token):
-        adjust_attributes(token, adjustMathMLAttributes)
-
-    def adjustSVGAttributes(self, token):
-        adjust_attributes(token, adjustSVGAttributes)
-
-    def adjustForeignAttributes(self, token):
-        adjust_attributes(token, adjustForeignAttributesMap)
-
-    def reparseTokenNormal(self, token):
-        # pylint:disable=unused-argument
-        self.parser.phase()
-
-    def resetInsertionMode(self):
-        # The name of this method is mostly historical. (It's also used in the
-        # specification.)
-        last = False
-        newModes = {
-            "select": "inSelect",
-            "td": "inCell",
-            "th": "inCell",
-            "tr": "inRow",
-            "tbody": "inTableBody",
-            "thead": "inTableBody",
-            "tfoot": "inTableBody",
-            "caption": "inCaption",
-            "colgroup": "inColumnGroup",
-            "table": "inTable",
-            "head": "inBody",
-            "body": "inBody",
-            "frameset": "inFrameset",
-            "html": "beforeHead"
-        }
-        for node in self.tree.openElements[::-1]:
-            nodeName = node.name
-            new_phase = None
-            if node == self.tree.openElements[0]:
-                assert self.innerHTML
-                last = True
-                nodeName = self.innerHTML
-            # Check for conditions that should only happen in the innerHTML
-            # case
-            if nodeName in ("select", "colgroup", "head", "html"):
-                assert self.innerHTML
-
-            if not last and node.namespace != self.tree.defaultNamespace:
-                continue
-
-            if nodeName in newModes:
-                new_phase = self.phases[newModes[nodeName]]
-                break
-            elif last:
-                new_phase = self.phases["inBody"]
-                break
-
-        self.phase = new_phase
-
-    def parseRCDataRawtext(self, token, contentType):
-        # Generic RCDATA/RAWTEXT Parsing algorithm
-        assert contentType in ("RAWTEXT", "RCDATA")
-
-        self.tree.insertElement(token)
-
-        if contentType == "RAWTEXT":
-            self.tokenizer.state = self.tokenizer.rawtextState
-        else:
-            self.tokenizer.state = self.tokenizer.rcdataState
-
-        self.originalPhase = self.phase
-
-        self.phase = self.phases["text"]
-
-
-@_utils.memoize
-def getPhases(debug):
-    def log(function):
-        """Logger that records which phase processes each token"""
-        type_names = dict((value, key) for key, value in
-                          tokenTypes.items())
-
-        def wrapped(self, *args, **kwargs):
-            if function.__name__.startswith("process") and len(args) > 0:
-                token = args[0]
-                try:
-                    info = {"type": type_names[token['type']]}
-                except:
-                    raise
-                if token['type'] in tagTokenTypes:
-                    info["name"] = token['name']
-
-                self.parser.log.append((self.parser.tokenizer.state.__name__,
-                                        self.parser.phase.__class__.__name__,
-                                        self.__class__.__name__,
-                                        function.__name__,
-                                        info))
-                return function(self, *args, **kwargs)
-            else:
-                return function(self, *args, **kwargs)
-        return wrapped
-
-    def getMetaclass(use_metaclass, metaclass_func):
-        if use_metaclass:
-            return method_decorator_metaclass(metaclass_func)
-        else:
-            return type
-
-    # pylint:disable=unused-argument
-    class Phase(with_metaclass(getMetaclass(debug, log))):
-        """Base class for helper object that implements each phase of processing
-        """
-
-        def __init__(self, parser, tree):
-            self.parser = parser
-            self.tree = tree
-
-        def processEOF(self):
-            raise NotImplementedError
-
-        def processComment(self, token):
-            # For most phases the following is correct. Where it's not it will be
-            # overridden.
-            self.tree.insertComment(token, self.tree.openElements[-1])
-
-        def processDoctype(self, token):
-            self.parser.parseError("unexpected-doctype")
-
-        def processCharacters(self, token):
-            self.tree.insertText(token["data"])
-
-        def processSpaceCharacters(self, token):
-            self.tree.insertText(token["data"])
-
-        def processStartTag(self, token):
-            return self.startTagHandler[token["name"]](token)
-
-        def startTagHtml(self, token):
-            if not self.parser.firstStartTag and token["name"] == "html":
-                self.parser.parseError("non-html-root")
-            # XXX Need a check here to see if the first start tag token emitted is
-            # this token... If it's not, invoke self.parser.parseError().
-            for attr, value in token["data"].items():
-                if attr not in self.tree.openElements[0].attributes:
-                    self.tree.openElements[0].attributes[attr] = value
-            self.parser.firstStartTag = False
-
-        def processEndTag(self, token):
-            return self.endTagHandler[token["name"]](token)
-
-    class InitialPhase(Phase):
-        def processSpaceCharacters(self, token):
-            pass
-
-        def processComment(self, token):
-            self.tree.insertComment(token, self.tree.document)
-
-        def processDoctype(self, token):
-            name = token["name"]
-            publicId = token["publicId"]
-            systemId = token["systemId"]
-            correct = token["correct"]
-
-            if (name != "html" or publicId is not None or
-                    systemId is not None and systemId != "about:legacy-compat"):
-                self.parser.parseError("unknown-doctype")
-
-            if publicId is None:
-                publicId = ""
-
-            self.tree.insertDoctype(token)
-
-            if publicId != "":
-                publicId = publicId.translate(asciiUpper2Lower)
-
-            if (not correct or token["name"] != "html" or
-                    publicId.startswith(
-                        ("+//silmaril//dtd html pro v0r11 19970101//",
-                         "-//advasoft ltd//dtd html 3.0 aswedit + extensions//",
-                         "-//as//dtd html 3.0 aswedit + extensions//",
-                         "-//ietf//dtd html 2.0 level 1//",
-                         "-//ietf//dtd html 2.0 level 2//",
-                         "-//ietf//dtd html 2.0 strict level 1//",
-                         "-//ietf//dtd html 2.0 strict level 2//",
-                         "-//ietf//dtd html 2.0 strict//",
-                         "-//ietf//dtd html 2.0//",
-                         "-//ietf//dtd html 2.1e//",
-                         "-//ietf//dtd html 3.0//",
-                         "-//ietf//dtd html 3.2 final//",
-                         "-//ietf//dtd html 3.2//",
-                         "-//ietf//dtd html 3//",
-                         "-//ietf//dtd html level 0//",
-                         "-//ietf//dtd html level 1//",
-                         "-//ietf//dtd html level 2//",
-                         "-//ietf//dtd html level 3//",
-                         "-//ietf//dtd html strict level 0//",
-                         "-//ietf//dtd html strict level 1//",
-                         "-//ietf//dtd html strict level 2//",
-                         "-//ietf//dtd html strict level 3//",
-                         "-//ietf//dtd html strict//",
-                         "-//ietf//dtd html//",
-                         "-//metrius//dtd metrius presentational//",
-                         "-//microsoft//dtd internet explorer 2.0 html strict//",
-                         "-//microsoft//dtd internet explorer 2.0 html//",
-                         "-//microsoft//dtd internet explorer 2.0 tables//",
-                         "-//microsoft//dtd internet explorer 3.0 html strict//",
-                         "-//microsoft//dtd internet explorer 3.0 html//",
-                         "-//microsoft//dtd internet explorer 3.0 tables//",
-                         "-//netscape comm. corp.//dtd html//",
-                         "-//netscape comm. corp.//dtd strict html//",
-                         "-//o'reilly and associates//dtd html 2.0//",
-                         "-//o'reilly and associates//dtd html extended 1.0//",
-                         "-//o'reilly and associates//dtd html extended relaxed 1.0//",
-                         "-//softquad software//dtd hotmetal pro 6.0::19990601::extensions to html 4.0//",
-                         "-//softquad//dtd hotmetal pro 4.0::19971010::extensions to html 4.0//",
-                         "-//spyglass//dtd html 2.0 extended//",
-                         "-//sq//dtd html 2.0 hotmetal + extensions//",
-                         "-//sun microsystems corp.//dtd hotjava html//",
-                         "-//sun microsystems corp.//dtd hotjava strict html//",
-                         "-//w3c//dtd html 3 1995-03-24//",
-                         "-//w3c//dtd html 3.2 draft//",
-                         "-//w3c//dtd html 3.2 final//",
-                         "-//w3c//dtd html 3.2//",
-                         "-//w3c//dtd html 3.2s draft//",
-                         "-//w3c//dtd html 4.0 frameset//",
-                         "-//w3c//dtd html 4.0 transitional//",
-                         "-//w3c//dtd html experimental 19960712//",
-                         "-//w3c//dtd html experimental 970421//",
-                         "-//w3c//dtd w3 html//",
-                         "-//w3o//dtd w3 html 3.0//",
-                         "-//webtechs//dtd mozilla html 2.0//",
-                         "-//webtechs//dtd mozilla html//")) or
-                    publicId in ("-//w3o//dtd w3 html strict 3.0//en//",
-                                 "-/w3c/dtd html 4.0 transitional/en",
-                                 "html") or
-                    publicId.startswith(
-                        ("-//w3c//dtd html 4.01 frameset//",
-                         "-//w3c//dtd html 4.01 transitional//")) and
-                    systemId is None or
-                    systemId and systemId.lower() == "http://www.ibm.com/data/dtd/v11/ibmxhtml1-transitional.dtd"):
-                self.parser.compatMode = "quirks"
-            elif (publicId.startswith(
-                    ("-//w3c//dtd xhtml 1.0 frameset//",
-                     "-//w3c//dtd xhtml 1.0 transitional//")) or
-                  publicId.startswith(
-                      ("-//w3c//dtd html 4.01 frameset//",
-                       "-//w3c//dtd html 4.01 transitional//")) and
-                  systemId is not None):
-                self.parser.compatMode = "limited quirks"
-
-            self.parser.phase = self.parser.phases["beforeHtml"]
-
-        def anythingElse(self):
-            self.parser.compatMode = "quirks"
-            self.parser.phase = self.parser.phases["beforeHtml"]
-
-        def processCharacters(self, token):
-            self.parser.parseError("expected-doctype-but-got-chars")
-            self.anythingElse()
-            return token
-
-        def processStartTag(self, token):
-            self.parser.parseError("expected-doctype-but-got-start-tag",
-                                   {"name": token["name"]})
-            self.anythingElse()
-            return token
-
-        def processEndTag(self, token):
-            self.parser.parseError("expected-doctype-but-got-end-tag",
-                                   {"name": token["name"]})
-            self.anythingElse()
-            return token
-
-        def processEOF(self):
-            self.parser.parseError("expected-doctype-but-got-eof")
-            self.anythingElse()
-            return True
-
-    class BeforeHtmlPhase(Phase):
-        # helper methods
-        def insertHtmlElement(self):
-            self.tree.insertRoot(impliedTagToken("html", "StartTag"))
-            self.parser.phase = self.parser.phases["beforeHead"]
-
-        # other
-        def processEOF(self):
-            self.insertHtmlElement()
-            return True
-
-        def processComment(self, token):
-            self.tree.insertComment(token, self.tree.document)
-
-        def processSpaceCharacters(self, token):
-            pass
-
-        def processCharacters(self, token):
-            self.insertHtmlElement()
-            return token
-
-        def processStartTag(self, token):
-            if token["name"] == "html":
-                self.parser.firstStartTag = True
-            self.insertHtmlElement()
-            return token
-
-        def processEndTag(self, token):
-            if token["name"] not in ("head", "body", "html", "br"):
-                self.parser.parseError("unexpected-end-tag-before-html",
-                                       {"name": token["name"]})
-            else:
-                self.insertHtmlElement()
-                return token
-
-    class BeforeHeadPhase(Phase):
-        def __init__(self, parser, tree):
-            Phase.__init__(self, parser, tree)
-
-            self.startTagHandler = _utils.MethodDispatcher([
-                ("html", self.startTagHtml),
-                ("head", self.startTagHead)
-            ])
-            self.startTagHandler.default = self.startTagOther
-
-            self.endTagHandler = _utils.MethodDispatcher([
-                (("head", "body", "html", "br"), self.endTagImplyHead)
-            ])
-            self.endTagHandler.default = self.endTagOther
-
-        def processEOF(self):
-            self.startTagHead(impliedTagToken("head", "StartTag"))
-            return True
-
-        def processSpaceCharacters(self, token):
-            pass
-
-        def processCharacters(self, token):
-            self.startTagHead(impliedTagToken("head", "StartTag"))
-            return token
-
-        def startTagHtml(self, token):
-            return self.parser.phases["inBody"].processStartTag(token)
-
-        def startTagHead(self, token):
-            self.tree.insertElement(token)
-            self.tree.headPointer = self.tree.openElements[-1]
-            self.parser.phase = self.parser.phases["inHead"]
-
-        def startTagOther(self, token):
-            self.startTagHead(impliedTagToken("head", "StartTag"))
-            return token
-
-        def endTagImplyHead(self, token):
-            self.startTagHead(impliedTagToken("head", "StartTag"))
-            return token
-
-        def endTagOther(self, token):
-            self.parser.parseError("end-tag-after-implied-root",
-                                   {"name": token["name"]})
-
-    class InHeadPhase(Phase):
-        def __init__(self, parser, tree):
-            Phase.__init__(self, parser, tree)
-
-            self.startTagHandler = _utils.MethodDispatcher([
-                ("html", self.startTagHtml),
-                ("title", self.startTagTitle),
-                (("noframes", "style"), self.startTagNoFramesStyle),
-                ("noscript", self.startTagNoscript),
-                ("script", self.startTagScript),
-                (("base", "basefont", "bgsound", "command", "link"),
-                 self.startTagBaseLinkCommand),
-                ("meta", self.startTagMeta),
-                ("head", self.startTagHead)
-            ])
-            self.startTagHandler.default = self.startTagOther
-
-            self.endTagHandler = _utils.MethodDispatcher([
-                ("head", self.endTagHead),
-                (("br", "html", "body"), self.endTagHtmlBodyBr)
-            ])
-            self.endTagHandler.default = self.endTagOther
-
-        # the real thing
-        def processEOF(self):
-            self.anythingElse()
-            return True
-
-        def processCharacters(self, token):
-            self.anythingElse()
-            return token
-
-        def startTagHtml(self, token):
-            return self.parser.phases["inBody"].processStartTag(token)
-
-        def startTagHead(self, token):
-            self.parser.parseError("two-heads-are-not-better-than-one")
-
-        def startTagBaseLinkCommand(self, token):
-            self.tree.insertElement(token)
-            self.tree.openElements.pop()
-            token["selfClosingAcknowledged"] = True
-
-        def startTagMeta(self, token):
-            self.tree.insertElement(token)
-            self.tree.openElements.pop()
-            token["selfClosingAcknowledged"] = True
-
-            attributes = token["data"]
-            if self.parser.tokenizer.stream.charEncoding[1] == "tentative":
-                if "charset" in attributes:
-                    self.parser.tokenizer.stream.changeEncoding(attributes["charset"])
-                elif ("content" in attributes and
-                      "http-equiv" in attributes and
-                      attributes["http-equiv"].lower() == "content-type"):
-                    # Encoding it as UTF-8 here is a hack, as really we should pass
-                    # the abstract Unicode string, and just use the
-                    # ContentAttrParser on that, but using UTF-8 allows all chars
-                    # to be encoded and as a ASCII-superset works.
-                    data = _inputstream.EncodingBytes(attributes["content"].encode("utf-8"))
-                    parser = _inputstream.ContentAttrParser(data)
-                    codec = parser.parse()
-                    self.parser.tokenizer.stream.changeEncoding(codec)
-
-        def startTagTitle(self, token):
-            self.parser.parseRCDataRawtext(token, "RCDATA")
-
-        def startTagNoFramesStyle(self, token):
-            # Need to decide whether to implement the scripting-disabled case
-            self.parser.parseRCDataRawtext(token, "RAWTEXT")
-
-        def startTagNoscript(self, token):
-            if self.parser.scripting:
-                self.parser.parseRCDataRawtext(token, "RAWTEXT")
-            else:
-                self.tree.insertElement(token)
-                self.parser.phase = self.parser.phases["inHeadNoscript"]
-
-        def startTagScript(self, token):
-            self.tree.insertElement(token)
-            self.parser.tokenizer.state = self.parser.tokenizer.scriptDataState
-            self.parser.originalPhase = self.parser.phase
-            self.parser.phase = self.parser.phases["text"]
-
-        def startTagOther(self, token):
-            self.anythingElse()
-            return token
-
-        def endTagHead(self, token):
-            node = self.parser.tree.openElements.pop()
-            assert node.name == "head", "Expected head got %s" % node.name
-            self.parser.phase = self.parser.phases["afterHead"]
-
-        def endTagHtmlBodyBr(self, token):
-            self.anythingElse()
-            return token
-
-        def endTagOther(self, token):
-            self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
-
-        def anythingElse(self):
-            self.endTagHead(impliedTagToken("head"))
-
-    class InHeadNoscriptPhase(Phase):
-        def __init__(self, parser, tree):
-            Phase.__init__(self, parser, tree)
-
-            self.startTagHandler = _utils.MethodDispatcher([
-                ("html", self.startTagHtml),
-                (("basefont", "bgsound", "link", "meta", "noframes", "style"), self.startTagBaseLinkCommand),
-                (("head", "noscript"), self.startTagHeadNoscript),
-            ])
-            self.startTagHandler.default = self.startTagOther
-
-            self.endTagHandler = _utils.MethodDispatcher([
-                ("noscript", self.endTagNoscript),
-                ("br", self.endTagBr),
-            ])
-            self.endTagHandler.default = self.endTagOther
-
-        def processEOF(self):
-            self.parser.parseError("eof-in-head-noscript")
-            self.anythingElse()
-            return True
-
-        def processComment(self, token):
-            return self.parser.phases["inHead"].processComment(token)
-
-        def processCharacters(self, token):
-            self.parser.parseError("char-in-head-noscript")
-            self.anythingElse()
-            return token
-
-        def processSpaceCharacters(self, token):
-            return self.parser.phases["inHead"].processSpaceCharacters(token)
-
-        def startTagHtml(self, token):
-            return self.parser.phases["inBody"].processStartTag(token)
-
-        def startTagBaseLinkCommand(self, token):
-            return self.parser.phases["inHead"].processStartTag(token)
-
-        def startTagHeadNoscript(self, token):
-            self.parser.parseError("unexpected-start-tag", {"name": token["name"]})
-
-        def startTagOther(self, token):
-            self.parser.parseError("unexpected-inhead-noscript-tag", {"name": token["name"]})
-            self.anythingElse()
-            return token
-
-        def endTagNoscript(self, token):
-            node = self.parser.tree.openElements.pop()
-            assert node.name == "noscript", "Expected noscript got %s" % node.name
-            self.parser.phase = self.parser.phases["inHead"]
-
-        def endTagBr(self, token):
-            self.parser.parseError("unexpected-inhead-noscript-tag", {"name": token["name"]})
-            self.anythingElse()
-            return token
-
-        def endTagOther(self, token):
-            self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
-
-        def anythingElse(self):
-            # Caller must raise parse error first!
-            self.endTagNoscript(impliedTagToken("noscript"))
-
-    class AfterHeadPhase(Phase):
-        def __init__(self, parser, tree):
-            Phase.__init__(self, parser, tree)
-
-            self.startTagHandler = _utils.MethodDispatcher([
-                ("html", self.startTagHtml),
-                ("body", self.startTagBody),
-                ("frameset", self.startTagFrameset),
-                (("base", "basefont", "bgsound", "link", "meta", "noframes", "script",
-                  "style", "title"),
-                 self.startTagFromHead),
-                ("head", self.startTagHead)
-            ])
-            self.startTagHandler.default = self.startTagOther
-            self.endTagHandler = _utils.MethodDispatcher([(("body", "html", "br"),
-                                                           self.endTagHtmlBodyBr)])
-            self.endTagHandler.default = self.endTagOther
-
-        def processEOF(self):
-            self.anythingElse()
-            return True
-
-        def processCharacters(self, token):
-            self.anythingElse()
-            return token
-
-        def startTagHtml(self, token):
-            return self.parser.phases["inBody"].processStartTag(token)
-
-        def startTagBody(self, token):
-            self.parser.framesetOK = False
-            self.tree.insertElement(token)
-            self.parser.phase = self.parser.phases["inBody"]
-
-        def startTagFrameset(self, token):
-            self.tree.insertElement(token)
-            self.parser.phase = self.parser.phases["inFrameset"]
-
-        def startTagFromHead(self, token):
-            self.parser.parseError("unexpected-start-tag-out-of-my-head",
-                                   {"name": token["name"]})
-            self.tree.openElements.append(self.tree.headPointer)
-            self.parser.phases["inHead"].processStartTag(token)
-            for node in self.tree.openElements[::-1]:
-                if node.name == "head":
-                    self.tree.openElements.remove(node)
-                    break
-
-        def startTagHead(self, token):
-            self.parser.parseError("unexpected-start-tag", {"name": token["name"]})
-
-        def startTagOther(self, token):
-            self.anythingElse()
-            return token
-
-        def endTagHtmlBodyBr(self, token):
-            self.anythingElse()
-            return token
-
-        def endTagOther(self, token):
-            self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
-
-        def anythingElse(self):
-            self.tree.insertElement(impliedTagToken("body", "StartTag"))
-            self.parser.phase = self.parser.phases["inBody"]
-            self.parser.framesetOK = True
-
-    class InBodyPhase(Phase):
-        # http://www.whatwg.org/specs/web-apps/current-work/#parsing-main-inbody
-        # the really-really-really-very crazy mode
-        def __init__(self, parser, tree):
-            Phase.__init__(self, parser, tree)
-
-            # Set this to the default handler
-            self.processSpaceCharacters = self.processSpaceCharactersNonPre
-
-            self.startTagHandler = _utils.MethodDispatcher([
-                ("html", self.startTagHtml),
-                (("base", "basefont", "bgsound", "command", "link", "meta",
-                  "script", "style", "title"),
-                 self.startTagProcessInHead),
-                ("body", self.startTagBody),
-                ("frameset", self.startTagFrameset),
-                (("address", "article", "aside", "blockquote", "center", "details",
-                  "dir", "div", "dl", "fieldset", "figcaption", "figure",
-                  "footer", "header", "hgroup", "main", "menu", "nav", "ol", "p",
-                  "section", "summary", "ul"),
-                 self.startTagCloseP),
-                (headingElements, self.startTagHeading),
-                (("pre", "listing"), self.startTagPreListing),
-                ("form", self.startTagForm),
-                (("li", "dd", "dt"), self.startTagListItem),
-                ("plaintext", self.startTagPlaintext),
-                ("a", self.startTagA),
-                (("b", "big", "code", "em", "font", "i", "s", "small", "strike",
-                  "strong", "tt", "u"), self.startTagFormatting),
-                ("nobr", self.startTagNobr),
-                ("button", self.startTagButton),
-                (("applet", "marquee", "object"), self.startTagAppletMarqueeObject),
-                ("xmp", self.startTagXmp),
-                ("table", self.startTagTable),
-                (("area", "br", "embed", "img", "keygen", "wbr"),
-                 self.startTagVoidFormatting),
-                (("param", "source", "track"), self.startTagParamSource),
-                ("input", self.startTagInput),
-                ("hr", self.startTagHr),
-                ("image", self.startTagImage),
-                ("isindex", self.startTagIsIndex),
-                ("textarea", self.startTagTextarea),
-                ("iframe", self.startTagIFrame),
-                ("noscript", self.startTagNoscript),
-                (("noembed", "noframes"), self.startTagRawtext),
-                ("select", self.startTagSelect),
-                (("rp", "rt"), self.startTagRpRt),
-                (("option", "optgroup"), self.startTagOpt),
-                (("math"), self.startTagMath),
-                (("svg"), self.startTagSvg),
-                (("caption", "col", "colgroup", "frame", "head",
-                  "tbody", "td", "tfoot", "th", "thead",
-                  "tr"), self.startTagMisplaced)
-            ])
-            self.startTagHandler.default = self.startTagOther
-
-            self.endTagHandler = _utils.MethodDispatcher([
-                ("body", self.endTagBody),
-                ("html", self.endTagHtml),
-                (("address", "article", "aside", "blockquote", "button", "center",
-                  "details", "dialog", "dir", "div", "dl", "fieldset", "figcaption", "figure",
-                  "footer", "header", "hgroup", "listing", "main", "menu", "nav", "ol", "pre",
-                  "section", "summary", "ul"), self.endTagBlock),
-                ("form", self.endTagForm),
-                ("p", self.endTagP),
-                (("dd", "dt", "li"), self.endTagListItem),
-                (headingElements, self.endTagHeading),
-                (("a", "b", "big", "code", "em", "font", "i", "nobr", "s", "small",
-                  "strike", "strong", "tt", "u"), self.endTagFormatting),
-                (("applet", "marquee", "object"), self.endTagAppletMarqueeObject),
-                ("br", self.endTagBr),
-            ])
-            self.endTagHandler.default = self.endTagOther
-
-        def isMatchingFormattingElement(self, node1, node2):
-            return (node1.name == node2.name and
-                    node1.namespace == node2.namespace and
-                    node1.attributes == node2.attributes)
-
-        # helper
-        def addFormattingElement(self, token):
-            self.tree.insertElement(token)
-            element = self.tree.openElements[-1]
-
-            matchingElements = []
-            for node in self.tree.activeFormattingElements[::-1]:
-                if node is Marker:
-                    break
-                elif self.isMatchingFormattingElement(node, element):
-                    matchingElements.append(node)
-
-            assert len(matchingElements) <= 3
-            if len(matchingElements) == 3:
-                self.tree.activeFormattingElements.remove(matchingElements[-1])
-            self.tree.activeFormattingElements.append(element)
-
-        # the real deal
-        def processEOF(self):
-            allowed_elements = frozenset(("dd", "dt", "li", "p", "tbody", "td",
-                                          "tfoot", "th", "thead", "tr", "body",
-                                          "html"))
-            for node in self.tree.openElements[::-1]:
-                if node.name not in allowed_elements:
-                    self.parser.parseError("expected-closing-tag-but-got-eof")
-                    break
-            # Stop parsing
-
-        def processSpaceCharactersDropNewline(self, token):
-            # Sometimes (start of <pre>, <listing>, and <textarea> blocks) we
-            # want to drop leading newlines
-            data = token["data"]
-            self.processSpaceCharacters = self.processSpaceCharactersNonPre
-            if (data.startswith("\n") and
-                self.tree.openElements[-1].name in ("pre", "listing", "textarea") and
-                    not self.tree.openElements[-1].hasContent()):
-                data = data[1:]
-            if data:
-                self.tree.reconstructActiveFormattingElements()
-                self.tree.insertText(data)
-
-        def processCharacters(self, token):
-            if token["data"] == "\u0000":
-                # The tokenizer should always emit null on its own
-                return
-            self.tree.reconstructActiveFormattingElements()
-            self.tree.insertText(token["data"])
-            # This must be bad for performance
-            if (self.parser.framesetOK and
-                any([char not in spaceCharacters
-                     for char in token["data"]])):
-                self.parser.framesetOK = False
-
-        def processSpaceCharactersNonPre(self, token):
-            self.tree.reconstructActiveFormattingElements()
-            self.tree.insertText(token["data"])
-
-        def startTagProcessInHead(self, token):
-            return self.parser.phases["inHead"].processStartTag(token)
-
-        def startTagBody(self, token):
-            self.parser.parseError("unexpected-start-tag", {"name": "body"})
-            if (len(self.tree.openElements) == 1 or
-                    self.tree.openElements[1].name != "body"):
-                assert self.parser.innerHTML
-            else:
-                self.parser.framesetOK = False
-                for attr, value in token["data"].items():
-                    if attr not in self.tree.openElements[1].attributes:
-                        self.tree.openElements[1].attributes[attr] = value
-
-        def startTagFrameset(self, token):
-            self.parser.parseError("unexpected-start-tag", {"name": "frameset"})
-            if (len(self.tree.openElements) == 1 or self.tree.openElements[1].name != "body"):
-                assert self.parser.innerHTML
-            elif not self.parser.framesetOK:
-                pass
-            else:
-                if self.tree.openElements[1].parent:
-                    self.tree.openElements[1].parent.removeChild(self.tree.openElements[1])
-                while self.tree.openElements[-1].name != "html":
-                    self.tree.openElements.pop()
-                self.tree.insertElement(token)
-                self.parser.phase = self.parser.phases["inFrameset"]
-
-        def startTagCloseP(self, token):
-            if self.tree.elementInScope("p", variant="button"):
-                self.endTagP(impliedTagToken("p"))
-            self.tree.insertElement(token)
-
-        def startTagPreListing(self, token):
-            if self.tree.elementInScope("p", variant="button"):
-                self.endTagP(impliedTagToken("p"))
-            self.tree.insertElement(token)
-            self.parser.framesetOK = False
-            self.processSpaceCharacters = self.processSpaceCharactersDropNewline
-
-        def startTagForm(self, token):
-            if self.tree.formPointer:
-                self.parser.parseError("unexpected-start-tag", {"name": "form"})
-            else:
-                if self.tree.elementInScope("p", variant="button"):
-                    self.endTagP(impliedTagToken("p"))
-                self.tree.insertElement(token)
-                self.tree.formPointer = self.tree.openElements[-1]
-
-        def startTagListItem(self, token):
-            self.parser.framesetOK = False
-
-            stopNamesMap = {"li": ["li"],
-                            "dt": ["dt", "dd"],
-                            "dd": ["dt", "dd"]}
-            stopNames = stopNamesMap[token["name"]]
-            for node in reversed(self.tree.openElements):
-                if node.name in stopNames:
-                    self.parser.phase.processEndTag(
-                        impliedTagToken(node.name, "EndTag"))
-                    break
-                if (node.nameTuple in specialElements and
-                        node.name not in ("address", "div", "p")):
-                    break
-
-            if self.tree.elementInScope("p", variant="button"):
-                self.parser.phase.processEndTag(
-                    impliedTagToken("p", "EndTag"))
-
-            self.tree.insertElement(token)
-
-        def startTagPlaintext(self, token):
-            if self.tree.elementInScope("p", variant="button"):
-                self.endTagP(impliedTagToken("p"))
-            self.tree.insertElement(token)
-            self.parser.tokenizer.state = self.parser.tokenizer.plaintextState
-
-        def startTagHeading(self, token):
-            if self.tree.elementInScope("p", variant="button"):
-                self.endTagP(impliedTagToken("p"))
-            if self.tree.openElements[-1].name in headingElements:
-                self.parser.parseError("unexpected-start-tag", {"name": token["name"]})
-                self.tree.openElements.pop()
-            self.tree.insertElement(token)
-
-        def startTagA(self, token):
-            afeAElement = self.tree.elementInActiveFormattingElements("a")
-            if afeAElement:
-                self.parser.parseError("unexpected-start-tag-implies-end-tag",
-                                       {"startName": "a", "endName": "a"})
-                self.endTagFormatting(impliedTagToken("a"))
-                if afeAElement in self.tree.openElements:
-                    self.tree.openElements.remove(afeAElement)
-                if afeAElement in self.tree.activeFormattingElements:
-                    self.tree.activeFormattingElements.remove(afeAElement)
-            self.tree.reconstructActiveFormattingElements()
-            self.addFormattingElement(token)
-
-        def startTagFormatting(self, token):
-            self.tree.reconstructActiveFormattingElements()
-            self.addFormattingElement(token)
-
-        def startTagNobr(self, token):
-            self.tree.reconstructActiveFormattingElements()
-            if self.tree.elementInScope("nobr"):
-                self.parser.parseError("unexpected-start-tag-implies-end-tag",
-                                       {"startName": "nobr", "endName": "nobr"})
-                self.processEndTag(impliedTagToken("nobr"))
-                # XXX Need tests that trigger the following
-                self.tree.reconstructActiveFormattingElements()
-            self.addFormattingElement(token)
-
-        def startTagButton(self, token):
-            if self.tree.elementInScope("button"):
-                self.parser.parseError("unexpected-start-tag-implies-end-tag",
-                                       {"startName": "button", "endName": "button"})
-                self.processEndTag(impliedTagToken("button"))
-                return token
-            else:
-                self.tree.reconstructActiveFormattingElements()
-                self.tree.insertElement(token)
-                self.parser.framesetOK = False
-
-        def startTagAppletMarqueeObject(self, token):
-            self.tree.reconstructActiveFormattingElements()
-            self.tree.insertElement(token)
-            self.tree.activeFormattingElements.append(Marker)
-            self.parser.framesetOK = False
-
-        def startTagXmp(self, token):
-            if self.tree.elementInScope("p", variant="button"):
-                self.endTagP(impliedTagToken("p"))
-            self.tree.reconstructActiveFormattingElements()
-            self.parser.framesetOK = False
-            self.parser.parseRCDataRawtext(token, "RAWTEXT")
-
-        def startTagTable(self, token):
-            if self.parser.compatMode != "quirks":
-                if self.tree.elementInScope("p", variant="button"):
-                    self.processEndTag(impliedTagToken("p"))
-            self.tree.insertElement(token)
-            self.parser.framesetOK = False
-            self.parser.phase = self.parser.phases["inTable"]
-
-        def startTagVoidFormatting(self, token):
-            self.tree.reconstructActiveFormattingElements()
-            self.tree.insertElement(token)
-            self.tree.openElements.pop()
-            token["selfClosingAcknowledged"] = True
-            self.parser.framesetOK = False
-
-        def startTagInput(self, token):
-            framesetOK = self.parser.framesetOK
-            self.startTagVoidFormatting(token)
-            if ("type" in token["data"] and
-                    token["data"]["type"].translate(asciiUpper2Lower) == "hidden"):
-                # input type=hidden doesn't change framesetOK
-                self.parser.framesetOK = framesetOK
-
-        def startTagParamSource(self, token):
-            self.tree.insertElement(token)
-            self.tree.openElements.pop()
-            token["selfClosingAcknowledged"] = True
-
-        def startTagHr(self, token):
-            if self.tree.elementInScope("p", variant="button"):
-                self.endTagP(impliedTagToken("p"))
-            self.tree.insertElement(token)
-            self.tree.openElements.pop()
-            token["selfClosingAcknowledged"] = True
-            self.parser.framesetOK = False
-
-        def startTagImage(self, token):
-            # No really...
-            self.parser.parseError("unexpected-start-tag-treated-as",
-                                   {"originalName": "image", "newName": "img"})
-            self.processStartTag(impliedTagToken("img", "StartTag",
-                                                 attributes=token["data"],
-                                                 selfClosing=token["selfClosing"]))
-
-        def startTagIsIndex(self, token):
-            self.parser.parseError("deprecated-tag", {"name": "isindex"})
-            if self.tree.formPointer:
-                return
-            form_attrs = {}
-            if "action" in token["data"]:
-                form_attrs["action"] = token["data"]["action"]
-            self.processStartTag(impliedTagToken("form", "StartTag",
-                                                 attributes=form_attrs))
-            self.processStartTag(impliedTagToken("hr", "StartTag"))
-            self.processStartTag(impliedTagToken("label", "StartTag"))
-            # XXX Localization ...
-            if "prompt" in token["data"]:
-                prompt = token["data"]["prompt"]
-            else:
-                prompt = "This is a searchable index. Enter search keywords: "
-            self.processCharacters(
-                {"type": tokenTypes["Characters"], "data": prompt})
-            attributes = token["data"].copy()
-            if "action" in attributes:
-                del attributes["action"]
-            if "prompt" in attributes:
-                del attributes["prompt"]
-            attributes["name"] = "isindex"
-            self.processStartTag(impliedTagToken("input", "StartTag",
-                                                 attributes=attributes,
-                                                 selfClosing=token["selfClosing"]))
-            self.processEndTag(impliedTagToken("label"))
-            self.processStartTag(impliedTagToken("hr", "StartTag"))
-            self.processEndTag(impliedTagToken("form"))
-
-        def startTagTextarea(self, token):
-            self.tree.insertElement(token)
-            self.parser.tokenizer.state = self.parser.tokenizer.rcdataState
-            self.processSpaceCharacters = self.processSpaceCharactersDropNewline
-            self.parser.framesetOK = False
-
-        def startTagIFrame(self, token):
-            self.parser.framesetOK = False
-            self.startTagRawtext(token)
-
-        def startTagNoscript(self, token):
-            if self.parser.scripting:
-                self.startTagRawtext(token)
-            else:
-                self.startTagOther(token)
-
-        def startTagRawtext(self, token):
-            """iframe, noembed noframes, noscript(if scripting enabled)"""
-            self.parser.parseRCDataRawtext(token, "RAWTEXT")
-
-        def startTagOpt(self, token):
-            if self.tree.openElements[-1].name == "option":
-                self.parser.phase.processEndTag(impliedTagToken("option"))
-            self.tree.reconstructActiveFormattingElements()
-            self.parser.tree.insertElement(token)
-
-        def startTagSelect(self, token):
-            self.tree.reconstructActiveFormattingElements()
-            self.tree.insertElement(token)
-            self.parser.framesetOK = False
-            if self.parser.phase in (self.parser.phases["inTable"],
-                                     self.parser.phases["inCaption"],
-                                     self.parser.phases["inColumnGroup"],
-                                     self.parser.phases["inTableBody"],
-                                     self.parser.phases["inRow"],
-                                     self.parser.phases["inCell"]):
-                self.parser.phase = self.parser.phases["inSelectInTable"]
-            else:
-                self.parser.phase = self.parser.phases["inSelect"]
-
-        def startTagRpRt(self, token):
-            if self.tree.elementInScope("ruby"):
-                self.tree.generateImpliedEndTags()
-                if self.tree.openElements[-1].name != "ruby":
-                    self.parser.parseError()
-            self.tree.insertElement(token)
-
-        def startTagMath(self, token):
-            self.tree.reconstructActiveFormattingElements()
-            self.parser.adjustMathMLAttributes(token)
-            self.parser.adjustForeignAttributes(token)
-            token["namespace"] = namespaces["mathml"]
-            self.tree.insertElement(token)
-            # Need to get the parse error right for the case where the token
-            # has a namespace not equal to the xmlns attribute
-            if token["selfClosing"]:
-                self.tree.openElements.pop()
-                token["selfClosingAcknowledged"] = True
-
-        def startTagSvg(self, token):
-            self.tree.reconstructActiveFormattingElements()
-            self.parser.adjustSVGAttributes(token)
-            self.parser.adjustForeignAttributes(token)
-            token["namespace"] = namespaces["svg"]
-            self.tree.insertElement(token)
-            # Need to get the parse error right for the case where the token
-            # has a namespace not equal to the xmlns attribute
-            if token["selfClosing"]:
-                self.tree.openElements.pop()
-                token["selfClosingAcknowledged"] = True
-
-        def startTagMisplaced(self, token):
-            """ Elements that should be children of other elements that have a
-            different insertion mode; here they are ignored
-            "caption", "col", "colgroup", "frame", "frameset", "head",
-            "option", "optgroup", "tbody", "td", "tfoot", "th", "thead",
-            "tr", "noscript"
-            """
-            self.parser.parseError("unexpected-start-tag-ignored", {"name": token["name"]})
-
-        def startTagOther(self, token):
-            self.tree.reconstructActiveFormattingElements()
-            self.tree.insertElement(token)
-
-        def endTagP(self, token):
-            if not self.tree.elementInScope("p", variant="button"):
-                self.startTagCloseP(impliedTagToken("p", "StartTag"))
-                self.parser.parseError("unexpected-end-tag", {"name": "p"})
-                self.endTagP(impliedTagToken("p", "EndTag"))
-            else:
-                self.tree.generateImpliedEndTags("p")
-                if self.tree.openElements[-1].name != "p":
-                    self.parser.parseError("unexpected-end-tag", {"name": "p"})
-                node = self.tree.openElements.pop()
-                while node.name != "p":
-                    node = self.tree.openElements.pop()
-
-        def endTagBody(self, token):
-            if not self.tree.elementInScope("body"):
-                self.parser.parseError()
-                return
-            elif self.tree.openElements[-1].name != "body":
-                for node in self.tree.openElements[2:]:
-                    if node.name not in frozenset(("dd", "dt", "li", "optgroup",
-                                                   "option", "p", "rp", "rt",
-                                                   "tbody", "td", "tfoot",
-                                                   "th", "thead", "tr", "body",
-                                                   "html")):
-                        # Not sure this is the correct name for the parse error
-                        self.parser.parseError(
-                            "expected-one-end-tag-but-got-another",
-                            {"gotName": "body", "expectedName": node.name})
-                        break
-            self.parser.phase = self.parser.phases["afterBody"]
-
-        def endTagHtml(self, token):
-            # We repeat the test for the body end tag token being ignored here
-            if self.tree.elementInScope("body"):
-                self.endTagBody(impliedTagToken("body"))
-                return token
-
-        def endTagBlock(self, token):
-            # Put us back in the right whitespace handling mode
-            if token["name"] == "pre":
-                self.processSpaceCharacters = self.processSpaceCharactersNonPre
-            inScope = self.tree.elementInScope(token["name"])
-            if inScope:
-                self.tree.generateImpliedEndTags()
-            if self.tree.openElements[-1].name != token["name"]:
-                self.parser.parseError("end-tag-too-early", {"name": token["name"]})
-            if inScope:
-                node = self.tree.openElements.pop()
-                while node.name != token["name"]:
-                    node = self.tree.openElements.pop()
-
-        def endTagForm(self, token):
-            node = self.tree.formPointer
-            self.tree.formPointer = None
-            if node is None or not self.tree.elementInScope(node):
-                self.parser.parseError("unexpected-end-tag",
-                                       {"name": "form"})
-            else:
-                self.tree.generateImpliedEndTags()
-                if self.tree.openElements[-1] != node:
-                    self.parser.parseError("end-tag-too-early-ignored",
-                                           {"name": "form"})
-                self.tree.openElements.remove(node)
-
-        def endTagListItem(self, token):
-            if token["name"] == "li":
-                variant = "list"
-            else:
-                variant = None
-            if not self.tree.elementInScope(token["name"], variant=variant):
-                self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
-            else:
-                self.tree.generateImpliedEndTags(exclude=token["name"])
-                if self.tree.openElements[-1].name != token["name"]:
-                    self.parser.parseError(
-                        "end-tag-too-early",
-                        {"name": token["name"]})
-                node = self.tree.openElements.pop()
-                while node.name != token["name"]:
-                    node = self.tree.openElements.pop()
-
-        def endTagHeading(self, token):
-            for item in headingElements:
-                if self.tree.elementInScope(item):
-                    self.tree.generateImpliedEndTags()
-                    break
-            if self.tree.openElements[-1].name != token["name"]:
-                self.parser.parseError("end-tag-too-early", {"name": token["name"]})
-
-            for item in headingElements:
-                if self.tree.elementInScope(item):
-                    item = self.tree.openElements.pop()
-                    while item.name not in headingElements:
-                        item = self.tree.openElements.pop()
-                    break
-
-        def endTagFormatting(self, token):
-            """The much-feared adoption agency algorithm"""
-            # http://svn.whatwg.org/webapps/complete.html#adoptionAgency revision 7867
-            # XXX Better parseError messages appreciated.
-
-            # Step 1
-            outerLoopCounter = 0
-
-            # Step 2
-            while outerLoopCounter < 8:
-
-                # Step 3
-                outerLoopCounter += 1
-
-                # Step 4:
-
-                # Let the formatting element be the last element in
-                # the list of active formatting elements that:
-                # - is between the end of the list and the last scope
-                # marker in the list, if any, or the start of the list
-                # otherwise, and
-                # - has the same tag name as the token.
-                formattingElement = self.tree.elementInActiveFormattingElements(
-                    token["name"])
-                if (not formattingElement or
-                    (formattingElement in self.tree.openElements and
-                     not self.tree.elementInScope(formattingElement.name))):
-                    # If there is no such node, then abort these steps
-                    # and instead act as described in the "any other
-                    # end tag" entry below.
-                    self.endTagOther(token)
-                    return
-
-                # Otherwise, if there is such a node, but that node is
-                # not in the stack of open elements, then this is a
-                # parse error; remove the element from the list, and
-                # abort these steps.
-                elif formattingElement not in self.tree.openElements:
-                    self.parser.parseError("adoption-agency-1.2", {"name": token["name"]})
-                    self.tree.activeFormattingElements.remove(formattingElement)
-                    return
-
-                # Otherwise, if there is such a node, and that node is
-                # also in the stack of open elements, but the element
-                # is not in scope, then this is a parse error; ignore
-                # the token, and abort these steps.
-                elif not self.tree.elementInScope(formattingElement.name):
-                    self.parser.parseError("adoption-agency-4.4", {"name": token["name"]})
-                    return
-
-                # Otherwise, there is a formatting element and that
-                # element is in the stack and is in scope. If the
-                # element is not the current node, this is a parse
-                # error. In any case, proceed with the algorithm as
-                # written in the following steps.
-                else:
-                    if formattingElement != self.tree.openElements[-1]:
-                        self.parser.parseError("adoption-agency-1.3", {"name": token["name"]})
-
-                # Step 5:
-
-                # Let the furthest block be the topmost node in the
-                # stack of open elements that is lower in the stack
-                # than the formatting element, and is an element in
-                # the special category. There might not be one.
-                afeIndex = self.tree.openElements.index(formattingElement)
-                furthestBlock = None
-                for element in self.tree.openElements[afeIndex:]:
-                    if element.nameTuple in specialElements:
-                        furthestBlock = element
-                        break
-
-                # Step 6:
-
-                # If there is no furthest block, then the UA must
-                # first pop all the nodes from the bottom of the stack
-                # of open elements, from the current node up to and
-                # including the formatting element, then remove the
-                # formatting element from the list of active
-                # formatting elements, and finally abort these steps.
-                if furthestBlock is None:
-                    element = self.tree.openElements.pop()
-                    while element != formattingElement:
-                        element = self.tree.openElements.pop()
-                    self.tree.activeFormattingElements.remove(element)
-                    return
-
-                # Step 7
-                commonAncestor = self.tree.openElements[afeIndex - 1]
-
-                # Step 8:
-                # The bookmark is supposed to help us identify where to reinsert
-                # nodes in step 15. We have to ensure that we reinsert nodes after
-                # the node before the active formatting element. Note the bookmark
-                # can move in step 9.7
-                bookmark = self.tree.activeFormattingElements.index(formattingElement)
-
-                # Step 9
-                lastNode = node = furthestBlock
-                innerLoopCounter = 0
-
-                index = self.tree.openElements.index(node)
-                while innerLoopCounter < 3:
-                    innerLoopCounter += 1
-                    # Node is element before node in open elements
-                    index -= 1
-                    node = self.tree.openElements[index]
-                    if node not in self.tree.activeFormattingElements:
-                        self.tree.openElements.remove(node)
-                        continue
-                    # Step 9.6
-                    if node == formattingElement:
-                        break
-                    # Step 9.7
-                    if lastNode == furthestBlock:
-                        bookmark = self.tree.activeFormattingElements.index(node) + 1
-                    # Step 9.8
-                    clone = node.cloneNode()
-                    # Replace node with clone
-                    self.tree.activeFormattingElements[
-                        self.tree.activeFormattingElements.index(node)] = clone
-                    self.tree.openElements[
-                        self.tree.openElements.index(node)] = clone
-                    node = clone
-                    # Step 9.9
-                    # Remove lastNode from its parents, if any
-                    if lastNode.parent:
-                        lastNode.parent.removeChild(lastNode)
-                    node.appendChild(lastNode)
-                    # Step 9.10
-                    lastNode = node
-
-                # Step 10
-                # Foster parent lastNode if commonAncestor is a
-                # table, tbody, tfoot, thead, or tr we need to foster
-                # parent the lastNode
-                if lastNode.parent:
-                    lastNode.parent.removeChild(lastNode)
-
-                if commonAncestor.name in frozenset(("table", "tbody", "tfoot", "thead", "tr")):
-                    parent, insertBefore = self.tree.getTableMisnestedNodePosition()
-                    parent.insertBefore(lastNode, insertBefore)
-                else:
-                    commonAncestor.appendChild(lastNode)
-
-                # Step 11
-                clone = formattingElement.cloneNode()
-
-                # Step 12
-                furthestBlock.reparentChildren(clone)
-
-                # Step 13
-                furthestBlock.appendChild(clone)
-
-                # Step 14
-                self.tree.activeFormattingElements.remove(formattingElement)
-                self.tree.activeFormattingElements.insert(bookmark, clone)
-
-                # Step 15
-                self.tree.openElements.remove(formattingElement)
-                self.tree.openElements.insert(
-                    self.tree.openElements.index(furthestBlock) + 1, clone)
-
-        def endTagAppletMarqueeObject(self, token):
-            if self.tree.elementInScope(token["name"]):
-                self.tree.generateImpliedEndTags()
-            if self.tree.openElements[-1].name != token["name"]:
-                self.parser.parseError("end-tag-too-early", {"name": token["name"]})
-
-            if self.tree.elementInScope(token["name"]):
-                element = self.tree.openElements.pop()
-                while element.name != token["name"]:
-                    element = self.tree.openElements.pop()
-                self.tree.clearActiveFormattingElements()
-
-        def endTagBr(self, token):
-            self.parser.parseError("unexpected-end-tag-treated-as",
-                                   {"originalName": "br", "newName": "br element"})
-            self.tree.reconstructActiveFormattingElements()
-            self.tree.insertElement(impliedTagToken("br", "StartTag"))
-            self.tree.openElements.pop()
-
-        def endTagOther(self, token):
-            for node in self.tree.openElements[::-1]:
-                if node.name == token["name"]:
-                    self.tree.generateImpliedEndTags(exclude=token["name"])
-                    if self.tree.openElements[-1].name != token["name"]:
-                        self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
-                    while self.tree.openElements.pop() != node:
-                        pass
-                    break
-                else:
-                    if node.nameTuple in specialElements:
-                        self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
-                        break
-
-    class TextPhase(Phase):
-        def __init__(self, parser, tree):
-            Phase.__init__(self, parser, tree)
-            self.startTagHandler = _utils.MethodDispatcher([])
-            self.startTagHandler.default = self.startTagOther
-            self.endTagHandler = _utils.MethodDispatcher([
-                ("script", self.endTagScript)])
-            self.endTagHandler.default = self.endTagOther
-
-        def processCharacters(self, token):
-            self.tree.insertText(token["data"])
-
-        def processEOF(self):
-            self.parser.parseError("expected-named-closing-tag-but-got-eof",
-                                   {"name": self.tree.openElements[-1].name})
-            self.tree.openElements.pop()
-            self.parser.phase = self.parser.originalPhase
-            return True
-
-        def startTagOther(self, token):
-            assert False, "Tried to process start tag %s in RCDATA/RAWTEXT mode" % token['name']
-
-        def endTagScript(self, token):
-            node = self.tree.openElements.pop()
-            assert node.name == "script"
-            self.parser.phase = self.parser.originalPhase
-            # The rest of this method is all stuff that only happens if
-            # document.write works
-
-        def endTagOther(self, token):
-            self.tree.openElements.pop()
-            self.parser.phase = self.parser.originalPhase
-
-    class InTablePhase(Phase):
-        # http://www.whatwg.org/specs/web-apps/current-work/#in-table
-        def __init__(self, parser, tree):
-            Phase.__init__(self, parser, tree)
-            self.startTagHandler = _utils.MethodDispatcher([
-                ("html", self.startTagHtml),
-                ("caption", self.startTagCaption),
-                ("colgroup", self.startTagColgroup),
-                ("col", self.startTagCol),
-                (("tbody", "tfoot", "thead"), self.startTagRowGroup),
-                (("td", "th", "tr"), self.startTagImplyTbody),
-                ("table", self.startTagTable),
-                (("style", "script"), self.startTagStyleScript),
-                ("input", self.startTagInput),
-                ("form", self.startTagForm)
-            ])
-            self.startTagHandler.default = self.startTagOther
-
-            self.endTagHandler = _utils.MethodDispatcher([
-                ("table", self.endTagTable),
-                (("body", "caption", "col", "colgroup", "html", "tbody", "td",
-                  "tfoot", "th", "thead", "tr"), self.endTagIgnore)
-            ])
-            self.endTagHandler.default = self.endTagOther
-
-        # helper methods
-        def clearStackToTableContext(self):
-            # "clear the stack back to a table context"
-            while self.tree.openElements[-1].name not in ("table", "html"):
-                # self.parser.parseError("unexpected-implied-end-tag-in-table",
-                #  {"name":  self.tree.openElements[-1].name})
-                self.tree.openElements.pop()
-            # When the current node is <html> it's an innerHTML case
-
-        # processing methods
-        def processEOF(self):
-            if self.tree.openElements[-1].name != "html":
-                self.parser.parseError("eof-in-table")
-            else:
-                assert self.parser.innerHTML
-            # Stop parsing
-
-        def processSpaceCharacters(self, token):
-            originalPhase = self.parser.phase
-            self.parser.phase = self.parser.phases["inTableText"]
-            self.parser.phase.originalPhase = originalPhase
-            self.parser.phase.processSpaceCharacters(token)
-
-        def processCharacters(self, token):
-            originalPhase = self.parser.phase
-            self.parser.phase = self.parser.phases["inTableText"]
-            self.parser.phase.originalPhase = originalPhase
-            self.parser.phase.processCharacters(token)
-
-        def insertText(self, token):
-            # If we get here there must be at least one non-whitespace character
-            # Do the table magic!
-            self.tree.insertFromTable = True
-            self.parser.phases["inBody"].processCharacters(token)
-            self.tree.insertFromTable = False
-
-        def startTagCaption(self, token):
-            self.clearStackToTableContext()
-            self.tree.activeFormattingElements.append(Marker)
-            self.tree.insertElement(token)
-            self.parser.phase = self.parser.phases["inCaption"]
-
-        def startTagColgroup(self, token):
-            self.clearStackToTableContext()
-            self.tree.insertElement(token)
-            self.parser.phase = self.parser.phases["inColumnGroup"]
-
-        def startTagCol(self, token):
-            self.startTagColgroup(impliedTagToken("colgroup", "StartTag"))
-            return token
-
-        def startTagRowGroup(self, token):
-            self.clearStackToTableContext()
-            self.tree.insertElement(token)
-            self.parser.phase = self.parser.phases["inTableBody"]
-
-        def startTagImplyTbody(self, token):
-            self.startTagRowGroup(impliedTagToken("tbody", "StartTag"))
-            return token
-
-        def startTagTable(self, token):
-            self.parser.parseError("unexpected-start-tag-implies-end-tag",
-                                   {"startName": "table", "endName": "table"})
-            self.parser.phase.processEndTag(impliedTagToken("table"))
-            if not self.parser.innerHTML:
-                return token
-
-        def startTagStyleScript(self, token):
-            return self.parser.phases["inHead"].processStartTag(token)
-
-        def startTagInput(self, token):
-            if ("type" in token["data"] and
-                    token["data"]["type"].translate(asciiUpper2Lower) == "hidden"):
-                self.parser.parseError("unexpected-hidden-input-in-table")
-                self.tree.insertElement(token)
-                # XXX associate with form
-                self.tree.openElements.pop()
-            else:
-                self.startTagOther(token)
-
-        def startTagForm(self, token):
-            self.parser.parseError("unexpected-form-in-table")
-            if self.tree.formPointer is None:
-                self.tree.insertElement(token)
-                self.tree.formPointer = self.tree.openElements[-1]
-                self.tree.openElements.pop()
-
-        def startTagOther(self, token):
-            self.parser.parseError("unexpected-start-tag-implies-table-voodoo", {"name": token["name"]})
-            # Do the table magic!
-            self.tree.insertFromTable = True
-            self.parser.phases["inBody"].processStartTag(token)
-            self.tree.insertFromTable = False
-
-        def endTagTable(self, token):
-            if self.tree.elementInScope("table", variant="table"):
-                self.tree.generateImpliedEndTags()
-                if self.tree.openElements[-1].name != "table":
-                    self.parser.parseError("end-tag-too-early-named",
-                                           {"gotName": "table",
-                                            "expectedName": self.tree.openElements[-1].name})
-                while self.tree.openElements[-1].name != "table":
-                    self.tree.openElements.pop()
-                self.tree.openElements.pop()
-                self.parser.resetInsertionMode()
-            else:
-                # innerHTML case
-                assert self.parser.innerHTML
-                self.parser.parseError()
-
-        def endTagIgnore(self, token):
-            self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
-
-        def endTagOther(self, token):
-            self.parser.parseError("unexpected-end-tag-implies-table-voodoo", {"name": token["name"]})
-            # Do the table magic!
-            self.tree.insertFromTable = True
-            self.parser.phases["inBody"].processEndTag(token)
-            self.tree.insertFromTable = False
-
-    class InTableTextPhase(Phase):
-        def __init__(self, parser, tree):
-            Phase.__init__(self, parser, tree)
-            self.originalPhase = None
-            self.characterTokens = []
-
-        def flushCharacters(self):
-            data = "".join([item["data"] for item in self.characterTokens])
-            if any([item not in spaceCharacters for item in data]):
-                token = {"type": tokenTypes["Characters"], "data": data}
-                self.parser.phases["inTable"].insertText(token)
-            elif data:
-                self.tree.insertText(data)
-            self.characterTokens = []
-
-        def processComment(self, token):
-            self.flushCharacters()
-            self.parser.phase = self.originalPhase
-            return token
-
-        def processEOF(self):
-            self.flushCharacters()
-            self.parser.phase = self.originalPhase
-            return True
-
-        def processCharacters(self, token):
-            if token["data"] == "\u0000":
-                return
-            self.characterTokens.append(token)
-
-        def processSpaceCharacters(self, token):
-            # pretty sure we should never reach here
-            self.characterTokens.append(token)
-    #        assert False
-
-        def processStartTag(self, token):
-            self.flushCharacters()
-            self.parser.phase = self.originalPhase
-            return token
-
-        def processEndTag(self, token):
-            self.flushCharacters()
-            self.parser.phase = self.originalPhase
-            return token
-
-    class InCaptionPhase(Phase):
-        # http://www.whatwg.org/specs/web-apps/current-work/#in-caption
-        def __init__(self, parser, tree):
-            Phase.__init__(self, parser, tree)
-
-            self.startTagHandler = _utils.MethodDispatcher([
-                ("html", self.startTagHtml),
-                (("caption", "col", "colgroup", "tbody", "td", "tfoot", "th",
-                  "thead", "tr"), self.startTagTableElement)
-            ])
-            self.startTagHandler.default = self.startTagOther
-
-            self.endTagHandler = _utils.MethodDispatcher([
-                ("caption", self.endTagCaption),
-                ("table", self.endTagTable),
-                (("body", "col", "colgroup", "html", "tbody", "td", "tfoot", "th",
-                  "thead", "tr"), self.endTagIgnore)
-            ])
-            self.endTagHandler.default = self.endTagOther
-
-        def ignoreEndTagCaption(self):
-            return not self.tree.elementInScope("caption", variant="table")
-
-        def processEOF(self):
-            self.parser.phases["inBody"].processEOF()
-
-        def processCharacters(self, token):
-            return self.parser.phases["inBody"].processCharacters(token)
-
-        def startTagTableElement(self, token):
-            self.parser.parseError()
-            # XXX Have to duplicate logic here to find out if the tag is ignored
-            ignoreEndTag = self.ignoreEndTagCaption()
-            self.parser.phase.processEndTag(impliedTagToken("caption"))
-            if not ignoreEndTag:
-                return token
-
-        def startTagOther(self, token):
-            return self.parser.phases["inBody"].processStartTag(token)
-
-        def endTagCaption(self, token):
-            if not self.ignoreEndTagCaption():
-                # AT this code is quite similar to endTagTable in "InTable"
-                self.tree.generateImpliedEndTags()
-                if self.tree.openElements[-1].name != "caption":
-                    self.parser.parseError("expected-one-end-tag-but-got-another",
-                                           {"gotName": "caption",
-                                            "expectedName": self.tree.openElements[-1].name})
-                while self.tree.openElements[-1].name != "caption":
-                    self.tree.openElements.pop()
-                self.tree.openElements.pop()
-                self.tree.clearActiveFormattingElements()
-                self.parser.phase = self.parser.phases["inTable"]
-            else:
-                # innerHTML case
-                assert self.parser.innerHTML
-                self.parser.parseError()
-
-        def endTagTable(self, token):
-            self.parser.parseError()
-            ignoreEndTag = self.ignoreEndTagCaption()
-            self.parser.phase.processEndTag(impliedTagToken("caption"))
-            if not ignoreEndTag:
-                return token
-
-        def endTagIgnore(self, token):
-            self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
-
-        def endTagOther(self, token):
-            return self.parser.phases["inBody"].processEndTag(token)
-
-    class InColumnGroupPhase(Phase):
-        # http://www.whatwg.org/specs/web-apps/current-work/#in-column
-
-        def __init__(self, parser, tree):
-            Phase.__init__(self, parser, tree)
-
-            self.startTagHandler = _utils.MethodDispatcher([
-                ("html", self.startTagHtml),
-                ("col", self.startTagCol)
-            ])
-            self.startTagHandler.default = self.startTagOther
-
-            self.endTagHandler = _utils.MethodDispatcher([
-                ("colgroup", self.endTagColgroup),
-                ("col", self.endTagCol)
-            ])
-            self.endTagHandler.default = self.endTagOther
-
-        def ignoreEndTagColgroup(self):
-            return self.tree.openElements[-1].name == "html"
-
-        def processEOF(self):
-            if self.tree.openElements[-1].name == "html":
-                assert self.parser.innerHTML
-                return
-            else:
-                ignoreEndTag = self.ignoreEndTagColgroup()
-                self.endTagColgroup(impliedTagToken("colgroup"))
-                if not ignoreEndTag:
-                    return True
-
-        def processCharacters(self, token):
-            ignoreEndTag = self.ignoreEndTagColgroup()
-            self.endTagColgroup(impliedTagToken("colgroup"))
-            if not ignoreEndTag:
-                return token
-
-        def startTagCol(self, token):
-            self.tree.insertElement(token)
-            self.tree.openElements.pop()
-            token["selfClosingAcknowledged"] = True
-
-        def startTagOther(self, token):
-            ignoreEndTag = self.ignoreEndTagColgroup()
-            self.endTagColgroup(impliedTagToken("colgroup"))
-            if not ignoreEndTag:
-                return token
-
-        def endTagColgroup(self, token):
-            if self.ignoreEndTagColgroup():
-                # innerHTML case
-                assert self.parser.innerHTML
-                self.parser.parseError()
-            else:
-                self.tree.openElements.pop()
-                self.parser.phase = self.parser.phases["inTable"]
-
-        def endTagCol(self, token):
-            self.parser.parseError("no-end-tag", {"name": "col"})
-
-        def endTagOther(self, token):
-            ignoreEndTag = self.ignoreEndTagColgroup()
-            self.endTagColgroup(impliedTagToken("colgroup"))
-            if not ignoreEndTag:
-                return token
-
-    class InTableBodyPhase(Phase):
-        # http://www.whatwg.org/specs/web-apps/current-work/#in-table0
-        def __init__(self, parser, tree):
-            Phase.__init__(self, parser, tree)
-            self.startTagHandler = _utils.MethodDispatcher([
-                ("html", self.startTagHtml),
-                ("tr", self.startTagTr),
-                (("td", "th"), self.startTagTableCell),
-                (("caption", "col", "colgroup", "tbody", "tfoot", "thead"),
-                 self.startTagTableOther)
-            ])
-            self.startTagHandler.default = self.startTagOther
-
-            self.endTagHandler = _utils.MethodDispatcher([
-                (("tbody", "tfoot", "thead"), self.endTagTableRowGroup),
-                ("table", self.endTagTable),
-                (("body", "caption", "col", "colgroup", "html", "td", "th",
-                  "tr"), self.endTagIgnore)
-            ])
-            self.endTagHandler.default = self.endTagOther
-
-        # helper methods
-        def clearStackToTableBodyContext(self):
-            while self.tree.openElements[-1].name not in ("tbody", "tfoot",
-                                                          "thead", "html"):
-                # self.parser.parseError("unexpected-implied-end-tag-in-table",
-                #  {"name": self.tree.openElements[-1].name})
-                self.tree.openElements.pop()
-            if self.tree.openElements[-1].name == "html":
-                assert self.parser.innerHTML
-
-        # the rest
-        def processEOF(self):
-            self.parser.phases["inTable"].processEOF()
-
-        def processSpaceCharacters(self, token):
-            return self.parser.phases["inTable"].processSpaceCharacters(token)
-
-        def processCharacters(self, token):
-            return self.parser.phases["inTable"].processCharacters(token)
-
-        def startTagTr(self, token):
-            self.clearStackToTableBodyContext()
-            self.tree.insertElement(token)
-            self.parser.phase = self.parser.phases["inRow"]
-
-        def startTagTableCell(self, token):
-            self.parser.parseError("unexpected-cell-in-table-body",
-                                   {"name": token["name"]})
-            self.startTagTr(impliedTagToken("tr", "StartTag"))
-            return token
-
-        def startTagTableOther(self, token):
-            # XXX AT Any ideas on how to share this with endTagTable?
-            if (self.tree.elementInScope("tbody", variant="table") or
-                self.tree.elementInScope("thead", variant="table") or
-                    self.tree.elementInScope("tfoot", variant="table")):
-                self.clearStackToTableBodyContext()
-                self.endTagTableRowGroup(
-                    impliedTagToken(self.tree.openElements[-1].name))
-                return token
-            else:
-                # innerHTML case
-                assert self.parser.innerHTML
-                self.parser.parseError()
-
-        def startTagOther(self, token):
-            return self.parser.phases["inTable"].processStartTag(token)
-
-        def endTagTableRowGroup(self, token):
-            if self.tree.elementInScope(token["name"], variant="table"):
-                self.clearStackToTableBodyContext()
-                self.tree.openElements.pop()
-                self.parser.phase = self.parser.phases["inTable"]
-            else:
-                self.parser.parseError("unexpected-end-tag-in-table-body",
-                                       {"name": token["name"]})
-
-        def endTagTable(self, token):
-            if (self.tree.elementInScope("tbody", variant="table") or
-                self.tree.elementInScope("thead", variant="table") or
-                    self.tree.elementInScope("tfoot", variant="table")):
-                self.clearStackToTableBodyContext()
-                self.endTagTableRowGroup(
-                    impliedTagToken(self.tree.openElements[-1].name))
-                return token
-            else:
-                # innerHTML case
-                assert self.parser.innerHTML
-                self.parser.parseError()
-
-        def endTagIgnore(self, token):
-            self.parser.parseError("unexpected-end-tag-in-table-body",
-                                   {"name": token["name"]})
-
-        def endTagOther(self, token):
-            return self.parser.phases["inTable"].processEndTag(token)
-
-    class InRowPhase(Phase):
-        # http://www.whatwg.org/specs/web-apps/current-work/#in-row
-        def __init__(self, parser, tree):
-            Phase.__init__(self, parser, tree)
-            self.startTagHandler = _utils.MethodDispatcher([
-                ("html", self.startTagHtml),
-                (("td", "th"), self.startTagTableCell),
-                (("caption", "col", "colgroup", "tbody", "tfoot", "thead",
-                  "tr"), self.startTagTableOther)
-            ])
-            self.startTagHandler.default = self.startTagOther
-
-            self.endTagHandler = _utils.MethodDispatcher([
-                ("tr", self.endTagTr),
-                ("table", self.endTagTable),
-                (("tbody", "tfoot", "thead"), self.endTagTableRowGroup),
-                (("body", "caption", "col", "colgroup", "html", "td", "th"),
-                 self.endTagIgnore)
-            ])
-            self.endTagHandler.default = self.endTagOther
-
-        # helper methods (XXX unify this with other table helper methods)
-        def clearStackToTableRowContext(self):
-            while self.tree.openElements[-1].name not in ("tr", "html"):
-                self.parser.parseError("unexpected-implied-end-tag-in-table-row",
-                                       {"name": self.tree.openElements[-1].name})
-                self.tree.openElements.pop()
-
-        def ignoreEndTagTr(self):
-            return not self.tree.elementInScope("tr", variant="table")
-
-        # the rest
-        def processEOF(self):
-            self.parser.phases["inTable"].processEOF()
-
-        def processSpaceCharacters(self, token):
-            return self.parser.phases["inTable"].processSpaceCharacters(token)
-
-        def processCharacters(self, token):
-            return self.parser.phases["inTable"].processCharacters(token)
-
-        def startTagTableCell(self, token):
-            self.clearStackToTableRowContext()
-            self.tree.insertElement(token)
-            self.parser.phase = self.parser.phases["inCell"]
-            self.tree.activeFormattingElements.append(Marker)
-
-        def startTagTableOther(self, token):
-            ignoreEndTag = self.ignoreEndTagTr()
-            self.endTagTr(impliedTagToken("tr"))
-            # XXX how are we sure it's always ignored in the innerHTML case?
-            if not ignoreEndTag:
-                return token
-
-        def startTagOther(self, token):
-            return self.parser.phases["inTable"].processStartTag(token)
-
-        def endTagTr(self, token):
-            if not self.ignoreEndTagTr():
-                self.clearStackToTableRowContext()
-                self.tree.openElements.pop()
-                self.parser.phase = self.parser.phases["inTableBody"]
-            else:
-                # innerHTML case
-                assert self.parser.innerHTML
-                self.parser.parseError()
-
-        def endTagTable(self, token):
-            ignoreEndTag = self.ignoreEndTagTr()
-            self.endTagTr(impliedTagToken("tr"))
-            # Reprocess the current tag if the tr end tag was not ignored
-            # XXX how are we sure it's always ignored in the innerHTML case?
-            if not ignoreEndTag:
-                return token
-
-        def endTagTableRowGroup(self, token):
-            if self.tree.elementInScope(token["name"], variant="table"):
-                self.endTagTr(impliedTagToken("tr"))
-                return token
-            else:
-                self.parser.parseError()
-
-        def endTagIgnore(self, token):
-            self.parser.parseError("unexpected-end-tag-in-table-row",
-                                   {"name": token["name"]})
-
-        def endTagOther(self, token):
-            return self.parser.phases["inTable"].processEndTag(token)
-
-    class InCellPhase(Phase):
-        # http://www.whatwg.org/specs/web-apps/current-work/#in-cell
-        def __init__(self, parser, tree):
-            Phase.__init__(self, parser, tree)
-            self.startTagHandler = _utils.MethodDispatcher([
-                ("html", self.startTagHtml),
-                (("caption", "col", "colgroup", "tbody", "td", "tfoot", "th",
-                  "thead", "tr"), self.startTagTableOther)
-            ])
-            self.startTagHandler.default = self.startTagOther
-
-            self.endTagHandler = _utils.MethodDispatcher([
-                (("td", "th"), self.endTagTableCell),
-                (("body", "caption", "col", "colgroup", "html"), self.endTagIgnore),
-                (("table", "tbody", "tfoot", "thead", "tr"), self.endTagImply)
-            ])
-            self.endTagHandler.default = self.endTagOther
-
-        # helper
-        def closeCell(self):
-            if self.tree.elementInScope("td", variant="table"):
-                self.endTagTableCell(impliedTagToken("td"))
-            elif self.tree.elementInScope("th", variant="table"):
-                self.endTagTableCell(impliedTagToken("th"))
-
-        # the rest
-        def processEOF(self):
-            self.parser.phases["inBody"].processEOF()
-
-        def processCharacters(self, token):
-            return self.parser.phases["inBody"].processCharacters(token)
-
-        def startTagTableOther(self, token):
-            if (self.tree.elementInScope("td", variant="table") or
-                    self.tree.elementInScope("th", variant="table")):
-                self.closeCell()
-                return token
-            else:
-                # innerHTML case
-                assert self.parser.innerHTML
-                self.parser.parseError()
-
-        def startTagOther(self, token):
-            return self.parser.phases["inBody"].processStartTag(token)
-
-        def endTagTableCell(self, token):
-            if self.tree.elementInScope(token["name"], variant="table"):
-                self.tree.generateImpliedEndTags(token["name"])
-                if self.tree.openElements[-1].name != token["name"]:
-                    self.parser.parseError("unexpected-cell-end-tag",
-                                           {"name": token["name"]})
-                    while True:
-                        node = self.tree.openElements.pop()
-                        if node.name == token["name"]:
-                            break
-                else:
-                    self.tree.openElements.pop()
-                self.tree.clearActiveFormattingElements()
-                self.parser.phase = self.parser.phases["inRow"]
-            else:
-                self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
-
-        def endTagIgnore(self, token):
-            self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
-
-        def endTagImply(self, token):
-            if self.tree.elementInScope(token["name"], variant="table"):
-                self.closeCell()
-                return token
-            else:
-                # sometimes innerHTML case
-                self.parser.parseError()
-
-        def endTagOther(self, token):
-            return self.parser.phases["inBody"].processEndTag(token)
-
-    class InSelectPhase(Phase):
-        def __init__(self, parser, tree):
-            Phase.__init__(self, parser, tree)
-
-            self.startTagHandler = _utils.MethodDispatcher([
-                ("html", self.startTagHtml),
-                ("option", self.startTagOption),
-                ("optgroup", self.startTagOptgroup),
-                ("select", self.startTagSelect),
-                (("input", "keygen", "textarea"), self.startTagInput),
-                ("script", self.startTagScript)
-            ])
-            self.startTagHandler.default = self.startTagOther
-
-            self.endTagHandler = _utils.MethodDispatcher([
-                ("option", self.endTagOption),
-                ("optgroup", self.endTagOptgroup),
-                ("select", self.endTagSelect)
-            ])
-            self.endTagHandler.default = self.endTagOther
-
-        # http://www.whatwg.org/specs/web-apps/current-work/#in-select
-        def processEOF(self):
-            if self.tree.openElements[-1].name != "html":
-                self.parser.parseError("eof-in-select")
-            else:
-                assert self.parser.innerHTML
-
-        def processCharacters(self, token):
-            if token["data"] == "\u0000":
-                return
-            self.tree.insertText(token["data"])
-
-        def startTagOption(self, token):
-            # We need to imply </option> if <option> is the current node.
-            if self.tree.openElements[-1].name == "option":
-                self.tree.openElements.pop()
-            self.tree.insertElement(token)
-
-        def startTagOptgroup(self, token):
-            if self.tree.openElements[-1].name == "option":
-                self.tree.openElements.pop()
-            if self.tree.openElements[-1].name == "optgroup":
-                self.tree.openElements.pop()
-            self.tree.insertElement(token)
-
-        def startTagSelect(self, token):
-            self.parser.parseError("unexpected-select-in-select")
-            self.endTagSelect(impliedTagToken("select"))
-
-        def startTagInput(self, token):
-            self.parser.parseError("unexpected-input-in-select")
-            if self.tree.elementInScope("select", variant="select"):
-                self.endTagSelect(impliedTagToken("select"))
-                return token
-            else:
-                assert self.parser.innerHTML
-
-        def startTagScript(self, token):
-            return self.parser.phases["inHead"].processStartTag(token)
-
-        def startTagOther(self, token):
-            self.parser.parseError("unexpected-start-tag-in-select",
-                                   {"name": token["name"]})
-
-        def endTagOption(self, token):
-            if self.tree.openElements[-1].name == "option":
-                self.tree.openElements.pop()
-            else:
-                self.parser.parseError("unexpected-end-tag-in-select",
-                                       {"name": "option"})
-
-        def endTagOptgroup(self, token):
-            # </optgroup> implicitly closes <option>
-            if (self.tree.openElements[-1].name == "option" and
-                    self.tree.openElements[-2].name == "optgroup"):
-                self.tree.openElements.pop()
-            # It also closes </optgroup>
-            if self.tree.openElements[-1].name == "optgroup":
-                self.tree.openElements.pop()
-            # But nothing else
-            else:
-                self.parser.parseError("unexpected-end-tag-in-select",
-                                       {"name": "optgroup"})
-
-        def endTagSelect(self, token):
-            if self.tree.elementInScope("select", variant="select"):
-                node = self.tree.openElements.pop()
-                while node.name != "select":
-                    node = self.tree.openElements.pop()
-                self.parser.resetInsertionMode()
-            else:
-                # innerHTML case
-                assert self.parser.innerHTML
-                self.parser.parseError()
-
-        def endTagOther(self, token):
-            self.parser.parseError("unexpected-end-tag-in-select",
-                                   {"name": token["name"]})
-
-    class InSelectInTablePhase(Phase):
-        def __init__(self, parser, tree):
-            Phase.__init__(self, parser, tree)
-
-            self.startTagHandler = _utils.MethodDispatcher([
-                (("caption", "table", "tbody", "tfoot", "thead", "tr", "td", "th"),
-                 self.startTagTable)
-            ])
-            self.startTagHandler.default = self.startTagOther
-
-            self.endTagHandler = _utils.MethodDispatcher([
-                (("caption", "table", "tbody", "tfoot", "thead", "tr", "td", "th"),
-                 self.endTagTable)
-            ])
-            self.endTagHandler.default = self.endTagOther
-
-        def processEOF(self):
-            self.parser.phases["inSelect"].processEOF()
-
-        def processCharacters(self, token):
-            return self.parser.phases["inSelect"].processCharacters(token)
-
-        def startTagTable(self, token):
-            self.parser.parseError("unexpected-table-element-start-tag-in-select-in-table", {"name": token["name"]})
-            self.endTagOther(impliedTagToken("select"))
-            return token
-
-        def startTagOther(self, token):
-            return self.parser.phases["inSelect"].processStartTag(token)
-
-        def endTagTable(self, token):
-            self.parser.parseError("unexpected-table-element-end-tag-in-select-in-table", {"name": token["name"]})
-            if self.tree.elementInScope(token["name"], variant="table"):
-                self.endTagOther(impliedTagToken("select"))
-                return token
-
-        def endTagOther(self, token):
-            return self.parser.phases["inSelect"].processEndTag(token)
-
-    class InForeignContentPhase(Phase):
-        breakoutElements = frozenset(["b", "big", "blockquote", "body", "br",
-                                      "center", "code", "dd", "div", "dl", "dt",
-                                      "em", "embed", "h1", "h2", "h3",
-                                      "h4", "h5", "h6", "head", "hr", "i", "img",
-                                      "li", "listing", "menu", "meta", "nobr",
-                                      "ol", "p", "pre", "ruby", "s", "small",
-                                      "span", "strong", "strike", "sub", "sup",
-                                      "table", "tt", "u", "ul", "var"])
-
-        def __init__(self, parser, tree):
-            Phase.__init__(self, parser, tree)
-
-        def adjustSVGTagNames(self, token):
-            replacements = {"altglyph": "altGlyph",
-                            "altglyphdef": "altGlyphDef",
-                            "altglyphitem": "altGlyphItem",
-                            "animatecolor": "animateColor",
-                            "animatemotion": "animateMotion",
-                            "animatetransform": "animateTransform",
-                            "clippath": "clipPath",
-                            "feblend": "feBlend",
-                            "fecolormatrix": "feColorMatrix",
-                            "fecomponenttransfer": "feComponentTransfer",
-                            "fecomposite": "feComposite",
-                            "feconvolvematrix": "feConvolveMatrix",
-                            "fediffuselighting": "feDiffuseLighting",
-                            "fedisplacementmap": "feDisplacementMap",
-                            "fedistantlight": "feDistantLight",
-                            "feflood": "feFlood",
-                            "fefunca": "feFuncA",
-                            "fefuncb": "feFuncB",
-                            "fefuncg": "feFuncG",
-                            "fefuncr": "feFuncR",
-                            "fegaussianblur": "feGaussianBlur",
-                            "feimage": "feImage",
-                            "femerge": "feMerge",
-                            "femergenode": "feMergeNode",
-                            "femorphology": "feMorphology",
-                            "feoffset": "feOffset",
-                            "fepointlight": "fePointLight",
-                            "fespecularlighting": "feSpecularLighting",
-                            "fespotlight": "feSpotLight",
-                            "fetile": "feTile",
-                            "feturbulence": "feTurbulence",
-                            "foreignobject": "foreignObject",
-                            "glyphref": "glyphRef",
-                            "lineargradient": "linearGradient",
-                            "radialgradient": "radialGradient",
-                            "textpath": "textPath"}
-
-            if token["name"] in replacements:
-                token["name"] = replacements[token["name"]]
-
-        def processCharacters(self, token):
-            if token["data"] == "\u0000":
-                token["data"] = "\uFFFD"
-            elif (self.parser.framesetOK and
-                  any(char not in spaceCharacters for char in token["data"])):
-                self.parser.framesetOK = False
-            Phase.processCharacters(self, token)
-
-        def processStartTag(self, token):
-            currentNode = self.tree.openElements[-1]
-            if (token["name"] in self.breakoutElements or
-                (token["name"] == "font" and
-                 set(token["data"].keys()) & set(["color", "face", "size"]))):
-                self.parser.parseError("unexpected-html-element-in-foreign-content",
-                                       {"name": token["name"]})
-                while (self.tree.openElements[-1].namespace !=
-                       self.tree.defaultNamespace and
-                       not self.parser.isHTMLIntegrationPoint(self.tree.openElements[-1]) and
-                       not self.parser.isMathMLTextIntegrationPoint(self.tree.openElements[-1])):
-                    self.tree.openElements.pop()
-                return token
-
-            else:
-                if currentNode.namespace == namespaces["mathml"]:
-                    self.parser.adjustMathMLAttributes(token)
-                elif currentNode.namespace == namespaces["svg"]:
-                    self.adjustSVGTagNames(token)
-                    self.parser.adjustSVGAttributes(token)
-                self.parser.adjustForeignAttributes(token)
-                token["namespace"] = currentNode.namespace
-                self.tree.insertElement(token)
-                if token["selfClosing"]:
-                    self.tree.openElements.pop()
-                    token["selfClosingAcknowledged"] = True
-
-        def processEndTag(self, token):
-            nodeIndex = len(self.tree.openElements) - 1
-            node = self.tree.openElements[-1]
-            if node.name.translate(asciiUpper2Lower) != token["name"]:
-                self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
-
-            while True:
-                if node.name.translate(asciiUpper2Lower) == token["name"]:
-                    # XXX this isn't in the spec but it seems necessary
-                    if self.parser.phase == self.parser.phases["inTableText"]:
-                        self.parser.phase.flushCharacters()
-                        self.parser.phase = self.parser.phase.originalPhase
-                    while self.tree.openElements.pop() != node:
-                        assert self.tree.openElements
-                    new_token = None
-                    break
-                nodeIndex -= 1
-
-                node = self.tree.openElements[nodeIndex]
-                if node.namespace != self.tree.defaultNamespace:
-                    continue
-                else:
-                    new_token = self.parser.phase.processEndTag(token)
-                    break
-            return new_token
-
-    class AfterBodyPhase(Phase):
-        def __init__(self, parser, tree):
-            Phase.__init__(self, parser, tree)
-
-            self.startTagHandler = _utils.MethodDispatcher([
-                ("html", self.startTagHtml)
-            ])
-            self.startTagHandler.default = self.startTagOther
-
-            self.endTagHandler = _utils.MethodDispatcher([("html", self.endTagHtml)])
-            self.endTagHandler.default = self.endTagOther
-
-        def processEOF(self):
-            # Stop parsing
-            pass
-
-        def processComment(self, token):
-            # This is needed because data is to be appended to the <html> element
-            # here and not to whatever is currently open.
-            self.tree.insertComment(token, self.tree.openElements[0])
-
-        def processCharacters(self, token):
-            self.parser.parseError("unexpected-char-after-body")
-            self.parser.phase = self.parser.phases["inBody"]
-            return token
-
-        def startTagHtml(self, token):
-            return self.parser.phases["inBody"].processStartTag(token)
-
-        def startTagOther(self, token):
-            self.parser.parseError("unexpected-start-tag-after-body",
-                                   {"name": token["name"]})
-            self.parser.phase = self.parser.phases["inBody"]
-            return token
-
-        def endTagHtml(self, name):
-            if self.parser.innerHTML:
-                self.parser.parseError("unexpected-end-tag-after-body-innerhtml")
-            else:
-                self.parser.phase = self.parser.phases["afterAfterBody"]
-
-        def endTagOther(self, token):
-            self.parser.parseError("unexpected-end-tag-after-body",
-                                   {"name": token["name"]})
-            self.parser.phase = self.parser.phases["inBody"]
-            return token
-
-    class InFramesetPhase(Phase):
-        # http://www.whatwg.org/specs/web-apps/current-work/#in-frameset
-        def __init__(self, parser, tree):
-            Phase.__init__(self, parser, tree)
-
-            self.startTagHandler = _utils.MethodDispatcher([
-                ("html", self.startTagHtml),
-                ("frameset", self.startTagFrameset),
-                ("frame", self.startTagFrame),
-                ("noframes", self.startTagNoframes)
-            ])
-            self.startTagHandler.default = self.startTagOther
-
-            self.endTagHandler = _utils.MethodDispatcher([
-                ("frameset", self.endTagFrameset)
-            ])
-            self.endTagHandler.default = self.endTagOther
-
-        def processEOF(self):
-            if self.tree.openElements[-1].name != "html":
-                self.parser.parseError("eof-in-frameset")
-            else:
-                assert self.parser.innerHTML
-
-        def processCharacters(self, token):
-            self.parser.parseError("unexpected-char-in-frameset")
-
-        def startTagFrameset(self, token):
-            self.tree.insertElement(token)
-
-        def startTagFrame(self, token):
-            self.tree.insertElement(token)
-            self.tree.openElements.pop()
-
-        def startTagNoframes(self, token):
-            return self.parser.phases["inBody"].processStartTag(token)
-
-        def startTagOther(self, token):
-            self.parser.parseError("unexpected-start-tag-in-frameset",
-                                   {"name": token["name"]})
-
-        def endTagFrameset(self, token):
-            if self.tree.openElements[-1].name == "html":
-                # innerHTML case
-                self.parser.parseError("unexpected-frameset-in-frameset-innerhtml")
-            else:
-                self.tree.openElements.pop()
-            if (not self.parser.innerHTML and
-                    self.tree.openElements[-1].name != "frameset"):
-                # If we're not in innerHTML mode and the current node is not a
-                # "frameset" element (anymore) then switch.
-                self.parser.phase = self.parser.phases["afterFrameset"]
-
-        def endTagOther(self, token):
-            self.parser.parseError("unexpected-end-tag-in-frameset",
-                                   {"name": token["name"]})
-
-    class AfterFramesetPhase(Phase):
-        # http://www.whatwg.org/specs/web-apps/current-work/#after3
-        def __init__(self, parser, tree):
-            Phase.__init__(self, parser, tree)
-
-            self.startTagHandler = _utils.MethodDispatcher([
-                ("html", self.startTagHtml),
-                ("noframes", self.startTagNoframes)
-            ])
-            self.startTagHandler.default = self.startTagOther
-
-            self.endTagHandler = _utils.MethodDispatcher([
-                ("html", self.endTagHtml)
-            ])
-            self.endTagHandler.default = self.endTagOther
-
-        def processEOF(self):
-            # Stop parsing
-            pass
-
-        def processCharacters(self, token):
-            self.parser.parseError("unexpected-char-after-frameset")
-
-        def startTagNoframes(self, token):
-            return self.parser.phases["inHead"].processStartTag(token)
-
-        def startTagOther(self, token):
-            self.parser.parseError("unexpected-start-tag-after-frameset",
-                                   {"name": token["name"]})
-
-        def endTagHtml(self, token):
-            self.parser.phase = self.parser.phases["afterAfterFrameset"]
-
-        def endTagOther(self, token):
-            self.parser.parseError("unexpected-end-tag-after-frameset",
-                                   {"name": token["name"]})
-
-    class AfterAfterBodyPhase(Phase):
-        def __init__(self, parser, tree):
-            Phase.__init__(self, parser, tree)
-
-            self.startTagHandler = _utils.MethodDispatcher([
-                ("html", self.startTagHtml)
-            ])
-            self.startTagHandler.default = self.startTagOther
-
-        def processEOF(self):
-            pass
-
-        def processComment(self, token):
-            self.tree.insertComment(token, self.tree.document)
-
-        def processSpaceCharacters(self, token):
-            return self.parser.phases["inBody"].processSpaceCharacters(token)
-
-        def processCharacters(self, token):
-            self.parser.parseError("expected-eof-but-got-char")
-            self.parser.phase = self.parser.phases["inBody"]
-            return token
-
-        def startTagHtml(self, token):
-            return self.parser.phases["inBody"].processStartTag(token)
-
-        def startTagOther(self, token):
-            self.parser.parseError("expected-eof-but-got-start-tag",
-                                   {"name": token["name"]})
-            self.parser.phase = self.parser.phases["inBody"]
-            return token
-
-        def processEndTag(self, token):
-            self.parser.parseError("expected-eof-but-got-end-tag",
-                                   {"name": token["name"]})
-            self.parser.phase = self.parser.phases["inBody"]
-            return token
-
-    class AfterAfterFramesetPhase(Phase):
-        def __init__(self, parser, tree):
-            Phase.__init__(self, parser, tree)
-
-            self.startTagHandler = _utils.MethodDispatcher([
-                ("html", self.startTagHtml),
-                ("noframes", self.startTagNoFrames)
-            ])
-            self.startTagHandler.default = self.startTagOther
-
-        def processEOF(self):
-            pass
-
-        def processComment(self, token):
-            self.tree.insertComment(token, self.tree.document)
-
-        def processSpaceCharacters(self, token):
-            return self.parser.phases["inBody"].processSpaceCharacters(token)
-
-        def processCharacters(self, token):
-            self.parser.parseError("expected-eof-but-got-char")
-
-        def startTagHtml(self, token):
-            return self.parser.phases["inBody"].processStartTag(token)
-
-        def startTagNoFrames(self, token):
-            return self.parser.phases["inHead"].processStartTag(token)
-
-        def startTagOther(self, token):
-            self.parser.parseError("expected-eof-but-got-start-tag",
-                                   {"name": token["name"]})
-
-        def processEndTag(self, token):
-            self.parser.parseError("expected-eof-but-got-end-tag",
-                                   {"name": token["name"]})
-    # pylint:enable=unused-argument
-
-    return {
-        "initial": InitialPhase,
-        "beforeHtml": BeforeHtmlPhase,
-        "beforeHead": BeforeHeadPhase,
-        "inHead": InHeadPhase,
-        "inHeadNoscript": InHeadNoscriptPhase,
-        "afterHead": AfterHeadPhase,
-        "inBody": InBodyPhase,
-        "text": TextPhase,
-        "inTable": InTablePhase,
-        "inTableText": InTableTextPhase,
-        "inCaption": InCaptionPhase,
-        "inColumnGroup": InColumnGroupPhase,
-        "inTableBody": InTableBodyPhase,
-        "inRow": InRowPhase,
-        "inCell": InCellPhase,
-        "inSelect": InSelectPhase,
-        "inSelectInTable": InSelectInTablePhase,
-        "inForeignContent": InForeignContentPhase,
-        "afterBody": AfterBodyPhase,
-        "inFrameset": InFramesetPhase,
-        "afterFrameset": AfterFramesetPhase,
-        "afterAfterBody": AfterAfterBodyPhase,
-        "afterAfterFrameset": AfterAfterFramesetPhase,
-        # XXX after after frameset
-    }
-
-
-def adjust_attributes(token, replacements):
-    needs_adjustment = viewkeys(token['data']) & viewkeys(replacements)
-    if needs_adjustment:
-        token['data'] = OrderedDict((replacements.get(k, k), v)
-                                    for k, v in token['data'].items())
-
-
-def impliedTagToken(name, type="EndTag", attributes=None,
-                    selfClosing=False):
-    if attributes is None:
-        attributes = {}
-    return {"type": tokenTypes[type], "name": name, "data": attributes,
-            "selfClosing": selfClosing}
-
-
-class ParseError(Exception):
-    """Error in parsed document"""
-    pass
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/serializer.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/serializer.py
deleted file mode 100644
index 53f4d44..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/serializer.py
+++ /dev/null
@@ -1,409 +0,0 @@
-from __future__ import absolute_import, division, unicode_literals
-from pip._vendor.six import text_type
-
-import re
-
-from codecs import register_error, xmlcharrefreplace_errors
-
-from .constants import voidElements, booleanAttributes, spaceCharacters
-from .constants import rcdataElements, entities, xmlEntities
-from . import treewalkers, _utils
-from xml.sax.saxutils import escape
-
-_quoteAttributeSpecChars = "".join(spaceCharacters) + "\"'=<>`"
-_quoteAttributeSpec = re.compile("[" + _quoteAttributeSpecChars + "]")
-_quoteAttributeLegacy = re.compile("[" + _quoteAttributeSpecChars +
-                                   "\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\n"
-                                   "\x0b\x0c\r\x0e\x0f\x10\x11\x12\x13\x14\x15"
-                                   "\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f"
-                                   "\x20\x2f\x60\xa0\u1680\u180e\u180f\u2000"
-                                   "\u2001\u2002\u2003\u2004\u2005\u2006\u2007"
-                                   "\u2008\u2009\u200a\u2028\u2029\u202f\u205f"
-                                   "\u3000]")
-
-
-_encode_entity_map = {}
-_is_ucs4 = len("\U0010FFFF") == 1
-for k, v in list(entities.items()):
-    # skip multi-character entities
-    if ((_is_ucs4 and len(v) > 1) or
-            (not _is_ucs4 and len(v) > 2)):
-        continue
-    if v != "&":
-        if len(v) == 2:
-            v = _utils.surrogatePairToCodepoint(v)
-        else:
-            v = ord(v)
-        if v not in _encode_entity_map or k.islower():
-            # prefer &lt; over &LT; and similarly for &amp;, &gt;, etc.
-            _encode_entity_map[v] = k
-
-
-def htmlentityreplace_errors(exc):
-    if isinstance(exc, (UnicodeEncodeError, UnicodeTranslateError)):
-        res = []
-        codepoints = []
-        skip = False
-        for i, c in enumerate(exc.object[exc.start:exc.end]):
-            if skip:
-                skip = False
-                continue
-            index = i + exc.start
-            if _utils.isSurrogatePair(exc.object[index:min([exc.end, index + 2])]):
-                codepoint = _utils.surrogatePairToCodepoint(exc.object[index:index + 2])
-                skip = True
-            else:
-                codepoint = ord(c)
-            codepoints.append(codepoint)
-        for cp in codepoints:
-            e = _encode_entity_map.get(cp)
-            if e:
-                res.append("&")
-                res.append(e)
-                if not e.endswith(";"):
-                    res.append(";")
-            else:
-                res.append("&#x%s;" % (hex(cp)[2:]))
-        return ("".join(res), exc.end)
-    else:
-        return xmlcharrefreplace_errors(exc)
-
-
-register_error("htmlentityreplace", htmlentityreplace_errors)
-
-
-def serialize(input, tree="etree", encoding=None, **serializer_opts):
-    """Serializes the input token stream using the specified treewalker
-
-    :arg input: the token stream to serialize
-
-    :arg tree: the treewalker to use
-
-    :arg encoding: the encoding to use
-
-    :arg serializer_opts: any options to pass to the
-        :py:class:`html5lib.serializer.HTMLSerializer` that gets created
-
-    :returns: the tree serialized as a string
-
-    Example:
-
-    >>> from html5lib.html5parser import parse
-    >>> from html5lib.serializer import serialize
-    >>> token_stream = parse('<html><body><p>Hi!</p></body></html>')
-    >>> serialize(token_stream, omit_optional_tags=False)
-    '<html><head></head><body><p>Hi!</p></body></html>'
-
-    """
-    # XXX: Should we cache this?
-    walker = treewalkers.getTreeWalker(tree)
-    s = HTMLSerializer(**serializer_opts)
-    return s.render(walker(input), encoding)
-
-
-class HTMLSerializer(object):
-
-    # attribute quoting options
-    quote_attr_values = "legacy"  # be secure by default
-    quote_char = '"'
-    use_best_quote_char = True
-
-    # tag syntax options
-    omit_optional_tags = True
-    minimize_boolean_attributes = True
-    use_trailing_solidus = False
-    space_before_trailing_solidus = True
-
-    # escaping options
-    escape_lt_in_attrs = False
-    escape_rcdata = False
-    resolve_entities = True
-
-    # miscellaneous options
-    alphabetical_attributes = False
-    inject_meta_charset = True
-    strip_whitespace = False
-    sanitize = False
-
-    options = ("quote_attr_values", "quote_char", "use_best_quote_char",
-               "omit_optional_tags", "minimize_boolean_attributes",
-               "use_trailing_solidus", "space_before_trailing_solidus",
-               "escape_lt_in_attrs", "escape_rcdata", "resolve_entities",
-               "alphabetical_attributes", "inject_meta_charset",
-               "strip_whitespace", "sanitize")
-
-    def __init__(self, **kwargs):
-        """Initialize HTMLSerializer
-
-        :arg inject_meta_charset: Whether or not to inject the meta charset.
-
-            Defaults to ``True``.
-
-        :arg quote_attr_values: Whether to quote attribute values that don't
-            require quoting per legacy browser behavior (``"legacy"``), when
-            required by the standard (``"spec"``), or always (``"always"``).
-
-            Defaults to ``"legacy"``.
-
-        :arg quote_char: Use given quote character for attribute quoting.
-
-            Defaults to ``"`` which will use double quotes unless attribute
-            value contains a double quote, in which case single quotes are
-            used.
-
-        :arg escape_lt_in_attrs: Whether or not to escape ``<`` in attribute
-            values.
-
-            Defaults to ``False``.
-
-        :arg escape_rcdata: Whether to escape characters that need to be
-            escaped within normal elements within rcdata elements such as
-            style.
-
-            Defaults to ``False``.
-
-        :arg resolve_entities: Whether to resolve named character entities that
-            appear in the source tree. The XML predefined entities &lt; &gt;
-            &amp; &quot; &apos; are unaffected by this setting.
-
-            Defaults to ``True``.
-
-        :arg strip_whitespace: Whether to remove semantically meaningless
-            whitespace. (This compresses all whitespace to a single space
-            except within ``pre``.)
-
-            Defaults to ``False``.
-
-        :arg minimize_boolean_attributes: Shortens boolean attributes to give
-            just the attribute value, for example::
-
-              <input disabled="disabled">
-
-            becomes::
-
-              <input disabled>
-
-            Defaults to ``True``.
-
-        :arg use_trailing_solidus: Includes a close-tag slash at the end of the
-            start tag of void elements (empty elements whose end tag is
-            forbidden). E.g. ``<hr/>``.
-
-            Defaults to ``False``.
-
-        :arg space_before_trailing_solidus: Places a space immediately before
-            the closing slash in a tag using a trailing solidus. E.g.
-            ``<hr />``. Requires ``use_trailing_solidus=True``.
-
-            Defaults to ``True``.
-
-        :arg sanitize: Strip all unsafe or unknown constructs from output.
-            See :py:class:`html5lib.filters.sanitizer.Filter`.
-
-            Defaults to ``False``.
-
-        :arg omit_optional_tags: Omit start/end tags that are optional.
-
-            Defaults to ``True``.
-
-        :arg alphabetical_attributes: Reorder attributes to be in alphabetical order.
-
-            Defaults to ``False``.
-
-        """
-        unexpected_args = frozenset(kwargs) - frozenset(self.options)
-        if len(unexpected_args) > 0:
-            raise TypeError("__init__() got an unexpected keyword argument '%s'" % next(iter(unexpected_args)))
-        if 'quote_char' in kwargs:
-            self.use_best_quote_char = False
-        for attr in self.options:
-            setattr(self, attr, kwargs.get(attr, getattr(self, attr)))
-        self.errors = []
-        self.strict = False
-
-    def encode(self, string):
-        assert(isinstance(string, text_type))
-        if self.encoding:
-            return string.encode(self.encoding, "htmlentityreplace")
-        else:
-            return string
-
-    def encodeStrict(self, string):
-        assert(isinstance(string, text_type))
-        if self.encoding:
-            return string.encode(self.encoding, "strict")
-        else:
-            return string
-
-    def serialize(self, treewalker, encoding=None):
-        # pylint:disable=too-many-nested-blocks
-        self.encoding = encoding
-        in_cdata = False
-        self.errors = []
-
-        if encoding and self.inject_meta_charset:
-            from .filters.inject_meta_charset import Filter
-            treewalker = Filter(treewalker, encoding)
-        # Alphabetical attributes is here under the assumption that none of
-        # the later filters add or change order of attributes; it needs to be
-        # before the sanitizer so escaped elements come out correctly
-        if self.alphabetical_attributes:
-            from .filters.alphabeticalattributes import Filter
-            treewalker = Filter(treewalker)
-        # WhitespaceFilter should be used before OptionalTagFilter
-        # for maximum efficiently of this latter filter
-        if self.strip_whitespace:
-            from .filters.whitespace import Filter
-            treewalker = Filter(treewalker)
-        if self.sanitize:
-            from .filters.sanitizer import Filter
-            treewalker = Filter(treewalker)
-        if self.omit_optional_tags:
-            from .filters.optionaltags import Filter
-            treewalker = Filter(treewalker)
-
-        for token in treewalker:
-            type = token["type"]
-            if type == "Doctype":
-                doctype = "<!DOCTYPE %s" % token["name"]
-
-                if token["publicId"]:
-                    doctype += ' PUBLIC "%s"' % token["publicId"]
-                elif token["systemId"]:
-                    doctype += " SYSTEM"
-                if token["systemId"]:
-                    if token["systemId"].find('"') >= 0:
-                        if token["systemId"].find("'") >= 0:
-                            self.serializeError("System identifer contains both single and double quote characters")
-                        quote_char = "'"
-                    else:
-                        quote_char = '"'
-                    doctype += " %s%s%s" % (quote_char, token["systemId"], quote_char)
-
-                doctype += ">"
-                yield self.encodeStrict(doctype)
-
-            elif type in ("Characters", "SpaceCharacters"):
-                if type == "SpaceCharacters" or in_cdata:
-                    if in_cdata and token["data"].find("</") >= 0:
-                        self.serializeError("Unexpected </ in CDATA")
-                    yield self.encode(token["data"])
-                else:
-                    yield self.encode(escape(token["data"]))
-
-            elif type in ("StartTag", "EmptyTag"):
-                name = token["name"]
-                yield self.encodeStrict("<%s" % name)
-                if name in rcdataElements and not self.escape_rcdata:
-                    in_cdata = True
-                elif in_cdata:
-                    self.serializeError("Unexpected child element of a CDATA element")
-                for (_, attr_name), attr_value in token["data"].items():
-                    # TODO: Add namespace support here
-                    k = attr_name
-                    v = attr_value
-                    yield self.encodeStrict(' ')
-
-                    yield self.encodeStrict(k)
-                    if not self.minimize_boolean_attributes or \
-                        (k not in booleanAttributes.get(name, tuple()) and
-                         k not in booleanAttributes.get("", tuple())):
-                        yield self.encodeStrict("=")
-                        if self.quote_attr_values == "always" or len(v) == 0:
-                            quote_attr = True
-                        elif self.quote_attr_values == "spec":
-                            quote_attr = _quoteAttributeSpec.search(v) is not None
-                        elif self.quote_attr_values == "legacy":
-                            quote_attr = _quoteAttributeLegacy.search(v) is not None
-                        else:
-                            raise ValueError("quote_attr_values must be one of: "
-                                             "'always', 'spec', or 'legacy'")
-                        v = v.replace("&", "&amp;")
-                        if self.escape_lt_in_attrs:
-                            v = v.replace("<", "&lt;")
-                        if quote_attr:
-                            quote_char = self.quote_char
-                            if self.use_best_quote_char:
-                                if "'" in v and '"' not in v:
-                                    quote_char = '"'
-                                elif '"' in v and "'" not in v:
-                                    quote_char = "'"
-                            if quote_char == "'":
-                                v = v.replace("'", "&#39;")
-                            else:
-                                v = v.replace('"', "&quot;")
-                            yield self.encodeStrict(quote_char)
-                            yield self.encode(v)
-                            yield self.encodeStrict(quote_char)
-                        else:
-                            yield self.encode(v)
-                if name in voidElements and self.use_trailing_solidus:
-                    if self.space_before_trailing_solidus:
-                        yield self.encodeStrict(" /")
-                    else:
-                        yield self.encodeStrict("/")
-                yield self.encode(">")
-
-            elif type == "EndTag":
-                name = token["name"]
-                if name in rcdataElements:
-                    in_cdata = False
-                elif in_cdata:
-                    self.serializeError("Unexpected child element of a CDATA element")
-                yield self.encodeStrict("</%s>" % name)
-
-            elif type == "Comment":
-                data = token["data"]
-                if data.find("--") >= 0:
-                    self.serializeError("Comment contains --")
-                yield self.encodeStrict("<!--%s-->" % token["data"])
-
-            elif type == "Entity":
-                name = token["name"]
-                key = name + ";"
-                if key not in entities:
-                    self.serializeError("Entity %s not recognized" % name)
-                if self.resolve_entities and key not in xmlEntities:
-                    data = entities[key]
-                else:
-                    data = "&%s;" % name
-                yield self.encodeStrict(data)
-
-            else:
-                self.serializeError(token["data"])
-
-    def render(self, treewalker, encoding=None):
-        """Serializes the stream from the treewalker into a string
-
-        :arg treewalker: the treewalker to serialize
-
-        :arg encoding: the string encoding to use
-
-        :returns: the serialized tree
-
-        Example:
-
-        >>> from html5lib import parse, getTreeWalker
-        >>> from html5lib.serializer import HTMLSerializer
-        >>> token_stream = parse('<html><body>Hi!</body></html>')
-        >>> walker = getTreeWalker('etree')
-        >>> serializer = HTMLSerializer(omit_optional_tags=False)
-        >>> serializer.render(walker(token_stream))
-        '<html><head></head><body>Hi!</body></html>'
-
-        """
-        if encoding:
-            return b"".join(list(self.serialize(treewalker, encoding)))
-        else:
-            return "".join(list(self.serialize(treewalker)))
-
-    def serializeError(self, data="XXX ERROR MESSAGE NEEDED"):
-        # XXX The idea is to make data mandatory.
-        self.errors.append(data)
-        if self.strict:
-            raise SerializeError
-
-
-class SerializeError(Exception):
-    """Error in serialized tree"""
-    pass
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treeadapters/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treeadapters/__init__.py
deleted file mode 100644
index 7ef5959..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treeadapters/__init__.py
+++ /dev/null
@@ -1,30 +0,0 @@
-"""Tree adapters let you convert from one tree structure to another
-
-Example:
-
-.. code-block:: python
-
-   from pip._vendor import html5lib
-   from pip._vendor.html5lib.treeadapters import genshi
-
-   doc = '<html><body>Hi!</body></html>'
-   treebuilder = html5lib.getTreeBuilder('etree')
-   parser = html5lib.HTMLParser(tree=treebuilder)
-   tree = parser.parse(doc)
-   TreeWalker = html5lib.getTreeWalker('etree')
-
-   genshi_tree = genshi.to_genshi(TreeWalker(tree))
-
-"""
-from __future__ import absolute_import, division, unicode_literals
-
-from . import sax
-
-__all__ = ["sax"]
-
-try:
-    from . import genshi  # noqa
-except ImportError:
-    pass
-else:
-    __all__.append("genshi")
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treeadapters/genshi.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treeadapters/genshi.py
deleted file mode 100644
index 61d5fb6..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treeadapters/genshi.py
+++ /dev/null
@@ -1,54 +0,0 @@
-from __future__ import absolute_import, division, unicode_literals
-
-from genshi.core import QName, Attrs
-from genshi.core import START, END, TEXT, COMMENT, DOCTYPE
-
-
-def to_genshi(walker):
-    """Convert a tree to a genshi tree
-
-    :arg walker: the treewalker to use to walk the tree to convert it
-
-    :returns: generator of genshi nodes
-
-    """
-    text = []
-    for token in walker:
-        type = token["type"]
-        if type in ("Characters", "SpaceCharacters"):
-            text.append(token["data"])
-        elif text:
-            yield TEXT, "".join(text), (None, -1, -1)
-            text = []
-
-        if type in ("StartTag", "EmptyTag"):
-            if token["namespace"]:
-                name = "{%s}%s" % (token["namespace"], token["name"])
-            else:
-                name = token["name"]
-            attrs = Attrs([(QName("{%s}%s" % attr if attr[0] is not None else attr[1]), value)
-                           for attr, value in token["data"].items()])
-            yield (START, (QName(name), attrs), (None, -1, -1))
-            if type == "EmptyTag":
-                type = "EndTag"
-
-        if type == "EndTag":
-            if token["namespace"]:
-                name = "{%s}%s" % (token["namespace"], token["name"])
-            else:
-                name = token["name"]
-
-            yield END, QName(name), (None, -1, -1)
-
-        elif type == "Comment":
-            yield COMMENT, token["data"], (None, -1, -1)
-
-        elif type == "Doctype":
-            yield DOCTYPE, (token["name"], token["publicId"],
-                            token["systemId"]), (None, -1, -1)
-
-        else:
-            pass  # FIXME: What to do?
-
-    if text:
-        yield TEXT, "".join(text), (None, -1, -1)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treeadapters/sax.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treeadapters/sax.py
deleted file mode 100644
index f4ccea5..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treeadapters/sax.py
+++ /dev/null
@@ -1,50 +0,0 @@
-from __future__ import absolute_import, division, unicode_literals
-
-from xml.sax.xmlreader import AttributesNSImpl
-
-from ..constants import adjustForeignAttributes, unadjustForeignAttributes
-
-prefix_mapping = {}
-for prefix, localName, namespace in adjustForeignAttributes.values():
-    if prefix is not None:
-        prefix_mapping[prefix] = namespace
-
-
-def to_sax(walker, handler):
-    """Call SAX-like content handler based on treewalker walker
-
-    :arg walker: the treewalker to use to walk the tree to convert it
-
-    :arg handler: SAX handler to use
-
-    """
-    handler.startDocument()
-    for prefix, namespace in prefix_mapping.items():
-        handler.startPrefixMapping(prefix, namespace)
-
-    for token in walker:
-        type = token["type"]
-        if type == "Doctype":
-            continue
-        elif type in ("StartTag", "EmptyTag"):
-            attrs = AttributesNSImpl(token["data"],
-                                     unadjustForeignAttributes)
-            handler.startElementNS((token["namespace"], token["name"]),
-                                   token["name"],
-                                   attrs)
-            if type == "EmptyTag":
-                handler.endElementNS((token["namespace"], token["name"]),
-                                     token["name"])
-        elif type == "EndTag":
-            handler.endElementNS((token["namespace"], token["name"]),
-                                 token["name"])
-        elif type in ("Characters", "SpaceCharacters"):
-            handler.characters(token["data"])
-        elif type == "Comment":
-            pass
-        else:
-            assert False, "Unknown token type"
-
-    for prefix, namespace in prefix_mapping.items():
-        handler.endPrefixMapping(prefix)
-    handler.endDocument()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treebuilders/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treebuilders/__init__.py
deleted file mode 100644
index d44447e..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treebuilders/__init__.py
+++ /dev/null
@@ -1,88 +0,0 @@
-"""A collection of modules for building different kinds of trees from HTML
-documents.
-
-To create a treebuilder for a new type of tree, you need to do
-implement several things:
-
-1. A set of classes for various types of elements: Document, Doctype, Comment,
-   Element. These must implement the interface of ``base.treebuilders.Node``
-   (although comment nodes have a different signature for their constructor,
-   see ``treebuilders.etree.Comment``) Textual content may also be implemented
-   as another node type, or not, as your tree implementation requires.
-
-2. A treebuilder object (called ``TreeBuilder`` by convention) that inherits
-   from ``treebuilders.base.TreeBuilder``. This has 4 required attributes:
-
-   * ``documentClass`` - the class to use for the bottommost node of a document
-   * ``elementClass`` - the class to use for HTML Elements
-   * ``commentClass`` - the class to use for comments
-   * ``doctypeClass`` - the class to use for doctypes
-
-   It also has one required method:
-
-   * ``getDocument`` - Returns the root node of the complete document tree
-
-3. If you wish to run the unit tests, you must also create a ``testSerializer``
-   method on your treebuilder which accepts a node and returns a string
-   containing Node and its children serialized according to the format used in
-   the unittests
-
-"""
-
-from __future__ import absolute_import, division, unicode_literals
-
-from .._utils import default_etree
-
-treeBuilderCache = {}
-
-
-def getTreeBuilder(treeType, implementation=None, **kwargs):
-    """Get a TreeBuilder class for various types of trees with built-in support
-
-    :arg treeType: the name of the tree type required (case-insensitive). Supported
-        values are:
-
-        * "dom" - A generic builder for DOM implementations, defaulting to a
-          xml.dom.minidom based implementation.
-        * "etree" - A generic builder for tree implementations exposing an
-          ElementTree-like interface, defaulting to xml.etree.cElementTree if
-          available and xml.etree.ElementTree if not.
-        * "lxml" - A etree-based builder for lxml.etree, handling limitations
-          of lxml's implementation.
-
-    :arg implementation: (Currently applies to the "etree" and "dom" tree
-        types). A module implementing the tree type e.g. xml.etree.ElementTree
-        or xml.etree.cElementTree.
-
-    :arg kwargs: Any additional options to pass to the TreeBuilder when
-        creating it.
-
-    Example:
-
-    >>> from html5lib.treebuilders import getTreeBuilder
-    >>> builder = getTreeBuilder('etree')
-
-    """
-
-    treeType = treeType.lower()
-    if treeType not in treeBuilderCache:
-        if treeType == "dom":
-            from . import dom
-            # Come up with a sane default (pref. from the stdlib)
-            if implementation is None:
-                from xml.dom import minidom
-                implementation = minidom
-            # NEVER cache here, caching is done in the dom submodule
-            return dom.getDomModule(implementation, **kwargs).TreeBuilder
-        elif treeType == "lxml":
-            from . import etree_lxml
-            treeBuilderCache[treeType] = etree_lxml.TreeBuilder
-        elif treeType == "etree":
-            from . import etree
-            if implementation is None:
-                implementation = default_etree
-            # NEVER cache here, caching is done in the etree submodule
-            return etree.getETreeModule(implementation, **kwargs).TreeBuilder
-        else:
-            raise ValueError("""Unrecognised treebuilder "%s" """ % treeType)
-    return treeBuilderCache.get(treeType)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treebuilders/base.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treebuilders/base.py
deleted file mode 100644
index 73973db..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treebuilders/base.py
+++ /dev/null
@@ -1,417 +0,0 @@
-from __future__ import absolute_import, division, unicode_literals
-from pip._vendor.six import text_type
-
-from ..constants import scopingElements, tableInsertModeElements, namespaces
-
-# The scope markers are inserted when entering object elements,
-# marquees, table cells, and table captions, and are used to prevent formatting
-# from "leaking" into tables, object elements, and marquees.
-Marker = None
-
-listElementsMap = {
-    None: (frozenset(scopingElements), False),
-    "button": (frozenset(scopingElements | set([(namespaces["html"], "button")])), False),
-    "list": (frozenset(scopingElements | set([(namespaces["html"], "ol"),
-                                              (namespaces["html"], "ul")])), False),
-    "table": (frozenset([(namespaces["html"], "html"),
-                         (namespaces["html"], "table")]), False),
-    "select": (frozenset([(namespaces["html"], "optgroup"),
-                          (namespaces["html"], "option")]), True)
-}
-
-
-class Node(object):
-    """Represents an item in the tree"""
-    def __init__(self, name):
-        """Creates a Node
-
-        :arg name: The tag name associated with the node
-
-        """
-        # The tag name assocaited with the node
-        self.name = name
-        # The parent of the current node (or None for the document node)
-        self.parent = None
-        # The value of the current node (applies to text nodes and comments)
-        self.value = None
-        # A dict holding name -> value pairs for attributes of the node
-        self.attributes = {}
-        # A list of child nodes of the current node. This must include all
-        # elements but not necessarily other node types.
-        self.childNodes = []
-        # A list of miscellaneous flags that can be set on the node.
-        self._flags = []
-
-    def __str__(self):
-        attributesStr = " ".join(["%s=\"%s\"" % (name, value)
-                                  for name, value in
-                                  self.attributes.items()])
-        if attributesStr:
-            return "<%s %s>" % (self.name, attributesStr)
-        else:
-            return "<%s>" % (self.name)
-
-    def __repr__(self):
-        return "<%s>" % (self.name)
-
-    def appendChild(self, node):
-        """Insert node as a child of the current node
-
-        :arg node: the node to insert
-
-        """
-        raise NotImplementedError
-
-    def insertText(self, data, insertBefore=None):
-        """Insert data as text in the current node, positioned before the
-        start of node insertBefore or to the end of the node's text.
-
-        :arg data: the data to insert
-
-        :arg insertBefore: True if you want to insert the text before the node
-            and False if you want to insert it after the node
-
-        """
-        raise NotImplementedError
-
-    def insertBefore(self, node, refNode):
-        """Insert node as a child of the current node, before refNode in the
-        list of child nodes. Raises ValueError if refNode is not a child of
-        the current node
-
-        :arg node: the node to insert
-
-        :arg refNode: the child node to insert the node before
-
-        """
-        raise NotImplementedError
-
-    def removeChild(self, node):
-        """Remove node from the children of the current node
-
-        :arg node: the child node to remove
-
-        """
-        raise NotImplementedError
-
-    def reparentChildren(self, newParent):
-        """Move all the children of the current node to newParent.
-        This is needed so that trees that don't store text as nodes move the
-        text in the correct way
-
-        :arg newParent: the node to move all this node's children to
-
-        """
-        # XXX - should this method be made more general?
-        for child in self.childNodes:
-            newParent.appendChild(child)
-        self.childNodes = []
-
-    def cloneNode(self):
-        """Return a shallow copy of the current node i.e. a node with the same
-        name and attributes but with no parent or child nodes
-        """
-        raise NotImplementedError
-
-    def hasContent(self):
-        """Return true if the node has children or text, false otherwise
-        """
-        raise NotImplementedError
-
-
-class ActiveFormattingElements(list):
-    def append(self, node):
-        equalCount = 0
-        if node != Marker:
-            for element in self[::-1]:
-                if element == Marker:
-                    break
-                if self.nodesEqual(element, node):
-                    equalCount += 1
-                if equalCount == 3:
-                    self.remove(element)
-                    break
-        list.append(self, node)
-
-    def nodesEqual(self, node1, node2):
-        if not node1.nameTuple == node2.nameTuple:
-            return False
-
-        if not node1.attributes == node2.attributes:
-            return False
-
-        return True
-
-
-class TreeBuilder(object):
-    """Base treebuilder implementation
-
-    * documentClass - the class to use for the bottommost node of a document
-    * elementClass - the class to use for HTML Elements
-    * commentClass - the class to use for comments
-    * doctypeClass - the class to use for doctypes
-
-    """
-    # pylint:disable=not-callable
-
-    # Document class
-    documentClass = None
-
-    # The class to use for creating a node
-    elementClass = None
-
-    # The class to use for creating comments
-    commentClass = None
-
-    # The class to use for creating doctypes
-    doctypeClass = None
-
-    # Fragment class
-    fragmentClass = None
-
-    def __init__(self, namespaceHTMLElements):
-        """Create a TreeBuilder
-
-        :arg namespaceHTMLElements: whether or not to namespace HTML elements
-
-        """
-        if namespaceHTMLElements:
-            self.defaultNamespace = "http://www.w3.org/1999/xhtml"
-        else:
-            self.defaultNamespace = None
-        self.reset()
-
-    def reset(self):
-        self.openElements = []
-        self.activeFormattingElements = ActiveFormattingElements()
-
-        # XXX - rename these to headElement, formElement
-        self.headPointer = None
-        self.formPointer = None
-
-        self.insertFromTable = False
-
-        self.document = self.documentClass()
-
-    def elementInScope(self, target, variant=None):
-
-        # If we pass a node in we match that. if we pass a string
-        # match any node with that name
-        exactNode = hasattr(target, "nameTuple")
-        if not exactNode:
-            if isinstance(target, text_type):
-                target = (namespaces["html"], target)
-            assert isinstance(target, tuple)
-
-        listElements, invert = listElementsMap[variant]
-
-        for node in reversed(self.openElements):
-            if exactNode and node == target:
-                return True
-            elif not exactNode and node.nameTuple == target:
-                return True
-            elif (invert ^ (node.nameTuple in listElements)):
-                return False
-
-        assert False  # We should never reach this point
-
-    def reconstructActiveFormattingElements(self):
-        # Within this algorithm the order of steps described in the
-        # specification is not quite the same as the order of steps in the
-        # code. It should still do the same though.
-
-        # Step 1: stop the algorithm when there's nothing to do.
-        if not self.activeFormattingElements:
-            return
-
-        # Step 2 and step 3: we start with the last element. So i is -1.
-        i = len(self.activeFormattingElements) - 1
-        entry = self.activeFormattingElements[i]
-        if entry == Marker or entry in self.openElements:
-            return
-
-        # Step 6
-        while entry != Marker and entry not in self.openElements:
-            if i == 0:
-                # This will be reset to 0 below
-                i = -1
-                break
-            i -= 1
-            # Step 5: let entry be one earlier in the list.
-            entry = self.activeFormattingElements[i]
-
-        while True:
-            # Step 7
-            i += 1
-
-            # Step 8
-            entry = self.activeFormattingElements[i]
-            clone = entry.cloneNode()  # Mainly to get a new copy of the attributes
-
-            # Step 9
-            element = self.insertElement({"type": "StartTag",
-                                          "name": clone.name,
-                                          "namespace": clone.namespace,
-                                          "data": clone.attributes})
-
-            # Step 10
-            self.activeFormattingElements[i] = element
-
-            # Step 11
-            if element == self.activeFormattingElements[-1]:
-                break
-
-    def clearActiveFormattingElements(self):
-        entry = self.activeFormattingElements.pop()
-        while self.activeFormattingElements and entry != Marker:
-            entry = self.activeFormattingElements.pop()
-
-    def elementInActiveFormattingElements(self, name):
-        """Check if an element exists between the end of the active
-        formatting elements and the last marker. If it does, return it, else
-        return false"""
-
-        for item in self.activeFormattingElements[::-1]:
-            # Check for Marker first because if it's a Marker it doesn't have a
-            # name attribute.
-            if item == Marker:
-                break
-            elif item.name == name:
-                return item
-        return False
-
-    def insertRoot(self, token):
-        element = self.createElement(token)
-        self.openElements.append(element)
-        self.document.appendChild(element)
-
-    def insertDoctype(self, token):
-        name = token["name"]
-        publicId = token["publicId"]
-        systemId = token["systemId"]
-
-        doctype = self.doctypeClass(name, publicId, systemId)
-        self.document.appendChild(doctype)
-
-    def insertComment(self, token, parent=None):
-        if parent is None:
-            parent = self.openElements[-1]
-        parent.appendChild(self.commentClass(token["data"]))
-
-    def createElement(self, token):
-        """Create an element but don't insert it anywhere"""
-        name = token["name"]
-        namespace = token.get("namespace", self.defaultNamespace)
-        element = self.elementClass(name, namespace)
-        element.attributes = token["data"]
-        return element
-
-    def _getInsertFromTable(self):
-        return self._insertFromTable
-
-    def _setInsertFromTable(self, value):
-        """Switch the function used to insert an element from the
-        normal one to the misnested table one and back again"""
-        self._insertFromTable = value
-        if value:
-            self.insertElement = self.insertElementTable
-        else:
-            self.insertElement = self.insertElementNormal
-
-    insertFromTable = property(_getInsertFromTable, _setInsertFromTable)
-
-    def insertElementNormal(self, token):
-        name = token["name"]
-        assert isinstance(name, text_type), "Element %s not unicode" % name
-        namespace = token.get("namespace", self.defaultNamespace)
-        element = self.elementClass(name, namespace)
-        element.attributes = token["data"]
-        self.openElements[-1].appendChild(element)
-        self.openElements.append(element)
-        return element
-
-    def insertElementTable(self, token):
-        """Create an element and insert it into the tree"""
-        element = self.createElement(token)
-        if self.openElements[-1].name not in tableInsertModeElements:
-            return self.insertElementNormal(token)
-        else:
-            # We should be in the InTable mode. This means we want to do
-            # special magic element rearranging
-            parent, insertBefore = self.getTableMisnestedNodePosition()
-            if insertBefore is None:
-                parent.appendChild(element)
-            else:
-                parent.insertBefore(element, insertBefore)
-            self.openElements.append(element)
-        return element
-
-    def insertText(self, data, parent=None):
-        """Insert text data."""
-        if parent is None:
-            parent = self.openElements[-1]
-
-        if (not self.insertFromTable or (self.insertFromTable and
-                                         self.openElements[-1].name
-                                         not in tableInsertModeElements)):
-            parent.insertText(data)
-        else:
-            # We should be in the InTable mode. This means we want to do
-            # special magic element rearranging
-            parent, insertBefore = self.getTableMisnestedNodePosition()
-            parent.insertText(data, insertBefore)
-
-    def getTableMisnestedNodePosition(self):
-        """Get the foster parent element, and sibling to insert before
-        (or None) when inserting a misnested table node"""
-        # The foster parent element is the one which comes before the most
-        # recently opened table element
-        # XXX - this is really inelegant
-        lastTable = None
-        fosterParent = None
-        insertBefore = None
-        for elm in self.openElements[::-1]:
-            if elm.name == "table":
-                lastTable = elm
-                break
-        if lastTable:
-            # XXX - we should really check that this parent is actually a
-            # node here
-            if lastTable.parent:
-                fosterParent = lastTable.parent
-                insertBefore = lastTable
-            else:
-                fosterParent = self.openElements[
-                    self.openElements.index(lastTable) - 1]
-        else:
-            fosterParent = self.openElements[0]
-        return fosterParent, insertBefore
-
-    def generateImpliedEndTags(self, exclude=None):
-        name = self.openElements[-1].name
-        # XXX td, th and tr are not actually needed
-        if (name in frozenset(("dd", "dt", "li", "option", "optgroup", "p", "rp", "rt")) and
-                name != exclude):
-            self.openElements.pop()
-            # XXX This is not entirely what the specification says. We should
-            # investigate it more closely.
-            self.generateImpliedEndTags(exclude)
-
-    def getDocument(self):
-        """Return the final tree"""
-        return self.document
-
-    def getFragment(self):
-        """Return the final fragment"""
-        # assert self.innerHTML
-        fragment = self.fragmentClass()
-        self.openElements[0].reparentChildren(fragment)
-        return fragment
-
-    def testSerializer(self, node):
-        """Serialize the subtree of node in the format required by unit tests
-
-        :arg node: the node from which to start serializing
-
-        """
-        raise NotImplementedError
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treebuilders/dom.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treebuilders/dom.py
deleted file mode 100644
index dcfac22..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treebuilders/dom.py
+++ /dev/null
@@ -1,236 +0,0 @@
-from __future__ import absolute_import, division, unicode_literals
-
-
-from collections import MutableMapping
-from xml.dom import minidom, Node
-import weakref
-
-from . import base
-from .. import constants
-from ..constants import namespaces
-from .._utils import moduleFactoryFactory
-
-
-def getDomBuilder(DomImplementation):
-    Dom = DomImplementation
-
-    class AttrList(MutableMapping):
-        def __init__(self, element):
-            self.element = element
-
-        def __iter__(self):
-            return iter(self.element.attributes.keys())
-
-        def __setitem__(self, name, value):
-            if isinstance(name, tuple):
-                raise NotImplementedError
-            else:
-                attr = self.element.ownerDocument.createAttribute(name)
-                attr.value = value
-                self.element.attributes[name] = attr
-
-        def __len__(self):
-            return len(self.element.attributes)
-
-        def items(self):
-            return list(self.element.attributes.items())
-
-        def values(self):
-            return list(self.element.attributes.values())
-
-        def __getitem__(self, name):
-            if isinstance(name, tuple):
-                raise NotImplementedError
-            else:
-                return self.element.attributes[name].value
-
-        def __delitem__(self, name):
-            if isinstance(name, tuple):
-                raise NotImplementedError
-            else:
-                del self.element.attributes[name]
-
-    class NodeBuilder(base.Node):
-        def __init__(self, element):
-            base.Node.__init__(self, element.nodeName)
-            self.element = element
-
-        namespace = property(lambda self: hasattr(self.element, "namespaceURI") and
-                             self.element.namespaceURI or None)
-
-        def appendChild(self, node):
-            node.parent = self
-            self.element.appendChild(node.element)
-
-        def insertText(self, data, insertBefore=None):
-            text = self.element.ownerDocument.createTextNode(data)
-            if insertBefore:
-                self.element.insertBefore(text, insertBefore.element)
-            else:
-                self.element.appendChild(text)
-
-        def insertBefore(self, node, refNode):
-            self.element.insertBefore(node.element, refNode.element)
-            node.parent = self
-
-        def removeChild(self, node):
-            if node.element.parentNode == self.element:
-                self.element.removeChild(node.element)
-            node.parent = None
-
-        def reparentChildren(self, newParent):
-            while self.element.hasChildNodes():
-                child = self.element.firstChild
-                self.element.removeChild(child)
-                newParent.element.appendChild(child)
-            self.childNodes = []
-
-        def getAttributes(self):
-            return AttrList(self.element)
-
-        def setAttributes(self, attributes):
-            if attributes:
-                for name, value in list(attributes.items()):
-                    if isinstance(name, tuple):
-                        if name[0] is not None:
-                            qualifiedName = (name[0] + ":" + name[1])
-                        else:
-                            qualifiedName = name[1]
-                        self.element.setAttributeNS(name[2], qualifiedName,
-                                                    value)
-                    else:
-                        self.element.setAttribute(
-                            name, value)
-        attributes = property(getAttributes, setAttributes)
-
-        def cloneNode(self):
-            return NodeBuilder(self.element.cloneNode(False))
-
-        def hasContent(self):
-            return self.element.hasChildNodes()
-
-        def getNameTuple(self):
-            if self.namespace is None:
-                return namespaces["html"], self.name
-            else:
-                return self.namespace, self.name
-
-        nameTuple = property(getNameTuple)
-
-    class TreeBuilder(base.TreeBuilder):  # pylint:disable=unused-variable
-        def documentClass(self):
-            self.dom = Dom.getDOMImplementation().createDocument(None, None, None)
-            return weakref.proxy(self)
-
-        def insertDoctype(self, token):
-            name = token["name"]
-            publicId = token["publicId"]
-            systemId = token["systemId"]
-
-            domimpl = Dom.getDOMImplementation()
-            doctype = domimpl.createDocumentType(name, publicId, systemId)
-            self.document.appendChild(NodeBuilder(doctype))
-            if Dom == minidom:
-                doctype.ownerDocument = self.dom
-
-        def elementClass(self, name, namespace=None):
-            if namespace is None and self.defaultNamespace is None:
-                node = self.dom.createElement(name)
-            else:
-                node = self.dom.createElementNS(namespace, name)
-
-            return NodeBuilder(node)
-
-        def commentClass(self, data):
-            return NodeBuilder(self.dom.createComment(data))
-
-        def fragmentClass(self):
-            return NodeBuilder(self.dom.createDocumentFragment())
-
-        def appendChild(self, node):
-            self.dom.appendChild(node.element)
-
-        def testSerializer(self, element):
-            return testSerializer(element)
-
-        def getDocument(self):
-            return self.dom
-
-        def getFragment(self):
-            return base.TreeBuilder.getFragment(self).element
-
-        def insertText(self, data, parent=None):
-            data = data
-            if parent != self:
-                base.TreeBuilder.insertText(self, data, parent)
-            else:
-                # HACK: allow text nodes as children of the document node
-                if hasattr(self.dom, '_child_node_types'):
-                    # pylint:disable=protected-access
-                    if Node.TEXT_NODE not in self.dom._child_node_types:
-                        self.dom._child_node_types = list(self.dom._child_node_types)
-                        self.dom._child_node_types.append(Node.TEXT_NODE)
-                self.dom.appendChild(self.dom.createTextNode(data))
-
-        implementation = DomImplementation
-        name = None
-
-    def testSerializer(element):
-        element.normalize()
-        rv = []
-
-        def serializeElement(element, indent=0):
-            if element.nodeType == Node.DOCUMENT_TYPE_NODE:
-                if element.name:
-                    if element.publicId or element.systemId:
-                        publicId = element.publicId or ""
-                        systemId = element.systemId or ""
-                        rv.append("""|%s<!DOCTYPE %s "%s" "%s">""" %
-                                  (' ' * indent, element.name, publicId, systemId))
-                    else:
-                        rv.append("|%s<!DOCTYPE %s>" % (' ' * indent, element.name))
-                else:
-                    rv.append("|%s<!DOCTYPE >" % (' ' * indent,))
-            elif element.nodeType == Node.DOCUMENT_NODE:
-                rv.append("#document")
-            elif element.nodeType == Node.DOCUMENT_FRAGMENT_NODE:
-                rv.append("#document-fragment")
-            elif element.nodeType == Node.COMMENT_NODE:
-                rv.append("|%s<!-- %s -->" % (' ' * indent, element.nodeValue))
-            elif element.nodeType == Node.TEXT_NODE:
-                rv.append("|%s\"%s\"" % (' ' * indent, element.nodeValue))
-            else:
-                if (hasattr(element, "namespaceURI") and
-                        element.namespaceURI is not None):
-                    name = "%s %s" % (constants.prefixes[element.namespaceURI],
-                                      element.nodeName)
-                else:
-                    name = element.nodeName
-                rv.append("|%s<%s>" % (' ' * indent, name))
-                if element.hasAttributes():
-                    attributes = []
-                    for i in range(len(element.attributes)):
-                        attr = element.attributes.item(i)
-                        name = attr.nodeName
-                        value = attr.value
-                        ns = attr.namespaceURI
-                        if ns:
-                            name = "%s %s" % (constants.prefixes[ns], attr.localName)
-                        else:
-                            name = attr.nodeName
-                        attributes.append((name, value))
-
-                    for name, value in sorted(attributes):
-                        rv.append('|%s%s="%s"' % (' ' * (indent + 2), name, value))
-            indent += 2
-            for child in element.childNodes:
-                serializeElement(child, indent)
-        serializeElement(element, 0)
-
-        return "\n".join(rv)
-
-    return locals()
-
-
-# The actual means to get a module!
-getDomModule = moduleFactoryFactory(getDomBuilder)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treebuilders/etree.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treebuilders/etree.py
deleted file mode 100644
index 0dedf44..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treebuilders/etree.py
+++ /dev/null
@@ -1,340 +0,0 @@
-from __future__ import absolute_import, division, unicode_literals
-# pylint:disable=protected-access
-
-from pip._vendor.six import text_type
-
-import re
-
-from . import base
-from .. import _ihatexml
-from .. import constants
-from ..constants import namespaces
-from .._utils import moduleFactoryFactory
-
-tag_regexp = re.compile("{([^}]*)}(.*)")
-
-
-def getETreeBuilder(ElementTreeImplementation, fullTree=False):
-    ElementTree = ElementTreeImplementation
-    ElementTreeCommentType = ElementTree.Comment("asd").tag
-
-    class Element(base.Node):
-        def __init__(self, name, namespace=None):
-            self._name = name
-            self._namespace = namespace
-            self._element = ElementTree.Element(self._getETreeTag(name,
-                                                                  namespace))
-            if namespace is None:
-                self.nameTuple = namespaces["html"], self._name
-            else:
-                self.nameTuple = self._namespace, self._name
-            self.parent = None
-            self._childNodes = []
-            self._flags = []
-
-        def _getETreeTag(self, name, namespace):
-            if namespace is None:
-                etree_tag = name
-            else:
-                etree_tag = "{%s}%s" % (namespace, name)
-            return etree_tag
-
-        def _setName(self, name):
-            self._name = name
-            self._element.tag = self._getETreeTag(self._name, self._namespace)
-
-        def _getName(self):
-            return self._name
-
-        name = property(_getName, _setName)
-
-        def _setNamespace(self, namespace):
-            self._namespace = namespace
-            self._element.tag = self._getETreeTag(self._name, self._namespace)
-
-        def _getNamespace(self):
-            return self._namespace
-
-        namespace = property(_getNamespace, _setNamespace)
-
-        def _getAttributes(self):
-            return self._element.attrib
-
-        def _setAttributes(self, attributes):
-            # Delete existing attributes first
-            # XXX - there may be a better way to do this...
-            for key in list(self._element.attrib.keys()):
-                del self._element.attrib[key]
-            for key, value in attributes.items():
-                if isinstance(key, tuple):
-                    name = "{%s}%s" % (key[2], key[1])
-                else:
-                    name = key
-                self._element.set(name, value)
-
-        attributes = property(_getAttributes, _setAttributes)
-
-        def _getChildNodes(self):
-            return self._childNodes
-
-        def _setChildNodes(self, value):
-            del self._element[:]
-            self._childNodes = []
-            for element in value:
-                self.insertChild(element)
-
-        childNodes = property(_getChildNodes, _setChildNodes)
-
-        def hasContent(self):
-            """Return true if the node has children or text"""
-            return bool(self._element.text or len(self._element))
-
-        def appendChild(self, node):
-            self._childNodes.append(node)
-            self._element.append(node._element)
-            node.parent = self
-
-        def insertBefore(self, node, refNode):
-            index = list(self._element).index(refNode._element)
-            self._element.insert(index, node._element)
-            node.parent = self
-
-        def removeChild(self, node):
-            self._childNodes.remove(node)
-            self._element.remove(node._element)
-            node.parent = None
-
-        def insertText(self, data, insertBefore=None):
-            if not(len(self._element)):
-                if not self._element.text:
-                    self._element.text = ""
-                self._element.text += data
-            elif insertBefore is None:
-                # Insert the text as the tail of the last child element
-                if not self._element[-1].tail:
-                    self._element[-1].tail = ""
-                self._element[-1].tail += data
-            else:
-                # Insert the text before the specified node
-                children = list(self._element)
-                index = children.index(insertBefore._element)
-                if index > 0:
-                    if not self._element[index - 1].tail:
-                        self._element[index - 1].tail = ""
-                    self._element[index - 1].tail += data
-                else:
-                    if not self._element.text:
-                        self._element.text = ""
-                    self._element.text += data
-
-        def cloneNode(self):
-            element = type(self)(self.name, self.namespace)
-            for name, value in self.attributes.items():
-                element.attributes[name] = value
-            return element
-
-        def reparentChildren(self, newParent):
-            if newParent.childNodes:
-                newParent.childNodes[-1]._element.tail += self._element.text
-            else:
-                if not newParent._element.text:
-                    newParent._element.text = ""
-                if self._element.text is not None:
-                    newParent._element.text += self._element.text
-            self._element.text = ""
-            base.Node.reparentChildren(self, newParent)
-
-    class Comment(Element):
-        def __init__(self, data):
-            # Use the superclass constructor to set all properties on the
-            # wrapper element
-            self._element = ElementTree.Comment(data)
-            self.parent = None
-            self._childNodes = []
-            self._flags = []
-
-        def _getData(self):
-            return self._element.text
-
-        def _setData(self, value):
-            self._element.text = value
-
-        data = property(_getData, _setData)
-
-    class DocumentType(Element):
-        def __init__(self, name, publicId, systemId):
-            Element.__init__(self, "<!DOCTYPE>")
-            self._element.text = name
-            self.publicId = publicId
-            self.systemId = systemId
-
-        def _getPublicId(self):
-            return self._element.get("publicId", "")
-
-        def _setPublicId(self, value):
-            if value is not None:
-                self._element.set("publicId", value)
-
-        publicId = property(_getPublicId, _setPublicId)
-
-        def _getSystemId(self):
-            return self._element.get("systemId", "")
-
-        def _setSystemId(self, value):
-            if value is not None:
-                self._element.set("systemId", value)
-
-        systemId = property(_getSystemId, _setSystemId)
-
-    class Document(Element):
-        def __init__(self):
-            Element.__init__(self, "DOCUMENT_ROOT")
-
-    class DocumentFragment(Element):
-        def __init__(self):
-            Element.__init__(self, "DOCUMENT_FRAGMENT")
-
-    def testSerializer(element):
-        rv = []
-
-        def serializeElement(element, indent=0):
-            if not(hasattr(element, "tag")):
-                element = element.getroot()
-            if element.tag == "<!DOCTYPE>":
-                if element.get("publicId") or element.get("systemId"):
-                    publicId = element.get("publicId") or ""
-                    systemId = element.get("systemId") or ""
-                    rv.append("""<!DOCTYPE %s "%s" "%s">""" %
-                              (element.text, publicId, systemId))
-                else:
-                    rv.append("<!DOCTYPE %s>" % (element.text,))
-            elif element.tag == "DOCUMENT_ROOT":
-                rv.append("#document")
-                if element.text is not None:
-                    rv.append("|%s\"%s\"" % (' ' * (indent + 2), element.text))
-                if element.tail is not None:
-                    raise TypeError("Document node cannot have tail")
-                if hasattr(element, "attrib") and len(element.attrib):
-                    raise TypeError("Document node cannot have attributes")
-            elif element.tag == ElementTreeCommentType:
-                rv.append("|%s<!-- %s -->" % (' ' * indent, element.text))
-            else:
-                assert isinstance(element.tag, text_type), \
-                    "Expected unicode, got %s, %s" % (type(element.tag), element.tag)
-                nsmatch = tag_regexp.match(element.tag)
-
-                if nsmatch is None:
-                    name = element.tag
-                else:
-                    ns, name = nsmatch.groups()
-                    prefix = constants.prefixes[ns]
-                    name = "%s %s" % (prefix, name)
-                rv.append("|%s<%s>" % (' ' * indent, name))
-
-                if hasattr(element, "attrib"):
-                    attributes = []
-                    for name, value in element.attrib.items():
-                        nsmatch = tag_regexp.match(name)
-                        if nsmatch is not None:
-                            ns, name = nsmatch.groups()
-                            prefix = constants.prefixes[ns]
-                            attr_string = "%s %s" % (prefix, name)
-                        else:
-                            attr_string = name
-                        attributes.append((attr_string, value))
-
-                    for name, value in sorted(attributes):
-                        rv.append('|%s%s="%s"' % (' ' * (indent + 2), name, value))
-                if element.text:
-                    rv.append("|%s\"%s\"" % (' ' * (indent + 2), element.text))
-            indent += 2
-            for child in element:
-                serializeElement(child, indent)
-            if element.tail:
-                rv.append("|%s\"%s\"" % (' ' * (indent - 2), element.tail))
-        serializeElement(element, 0)
-
-        return "\n".join(rv)
-
-    def tostring(element):  # pylint:disable=unused-variable
-        """Serialize an element and its child nodes to a string"""
-        rv = []
-        filter = _ihatexml.InfosetFilter()
-
-        def serializeElement(element):
-            if isinstance(element, ElementTree.ElementTree):
-                element = element.getroot()
-
-            if element.tag == "<!DOCTYPE>":
-                if element.get("publicId") or element.get("systemId"):
-                    publicId = element.get("publicId") or ""
-                    systemId = element.get("systemId") or ""
-                    rv.append("""<!DOCTYPE %s PUBLIC "%s" "%s">""" %
-                              (element.text, publicId, systemId))
-                else:
-                    rv.append("<!DOCTYPE %s>" % (element.text,))
-            elif element.tag == "DOCUMENT_ROOT":
-                if element.text is not None:
-                    rv.append(element.text)
-                if element.tail is not None:
-                    raise TypeError("Document node cannot have tail")
-                if hasattr(element, "attrib") and len(element.attrib):
-                    raise TypeError("Document node cannot have attributes")
-
-                for child in element:
-                    serializeElement(child)
-
-            elif element.tag == ElementTreeCommentType:
-                rv.append("<!--%s-->" % (element.text,))
-            else:
-                # This is assumed to be an ordinary element
-                if not element.attrib:
-                    rv.append("<%s>" % (filter.fromXmlName(element.tag),))
-                else:
-                    attr = " ".join(["%s=\"%s\"" % (
-                        filter.fromXmlName(name), value)
-                        for name, value in element.attrib.items()])
-                    rv.append("<%s %s>" % (element.tag, attr))
-                if element.text:
-                    rv.append(element.text)
-
-                for child in element:
-                    serializeElement(child)
-
-                rv.append("</%s>" % (element.tag,))
-
-            if element.tail:
-                rv.append(element.tail)
-
-        serializeElement(element)
-
-        return "".join(rv)
-
-    class TreeBuilder(base.TreeBuilder):  # pylint:disable=unused-variable
-        documentClass = Document
-        doctypeClass = DocumentType
-        elementClass = Element
-        commentClass = Comment
-        fragmentClass = DocumentFragment
-        implementation = ElementTreeImplementation
-
-        def testSerializer(self, element):
-            return testSerializer(element)
-
-        def getDocument(self):
-            if fullTree:
-                return self.document._element
-            else:
-                if self.defaultNamespace is not None:
-                    return self.document._element.find(
-                        "{%s}html" % self.defaultNamespace)
-                else:
-                    return self.document._element.find("html")
-
-        def getFragment(self):
-            return base.TreeBuilder.getFragment(self)._element
-
-    return locals()
-
-
-getETreeModule = moduleFactoryFactory(getETreeBuilder)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treebuilders/etree_lxml.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treebuilders/etree_lxml.py
deleted file mode 100644
index ca12a99..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treebuilders/etree_lxml.py
+++ /dev/null
@@ -1,366 +0,0 @@
-"""Module for supporting the lxml.etree library. The idea here is to use as much
-of the native library as possible, without using fragile hacks like custom element
-names that break between releases. The downside of this is that we cannot represent
-all possible trees; specifically the following are known to cause problems:
-
-Text or comments as siblings of the root element
-Docypes with no name
-
-When any of these things occur, we emit a DataLossWarning
-"""
-
-from __future__ import absolute_import, division, unicode_literals
-# pylint:disable=protected-access
-
-import warnings
-import re
-import sys
-
-from . import base
-from ..constants import DataLossWarning
-from .. import constants
-from . import etree as etree_builders
-from .. import _ihatexml
-
-import lxml.etree as etree
-
-
-fullTree = True
-tag_regexp = re.compile("{([^}]*)}(.*)")
-
-comment_type = etree.Comment("asd").tag
-
-
-class DocumentType(object):
-    def __init__(self, name, publicId, systemId):
-        self.name = name
-        self.publicId = publicId
-        self.systemId = systemId
-
-
-class Document(object):
-    def __init__(self):
-        self._elementTree = None
-        self._childNodes = []
-
-    def appendChild(self, element):
-        self._elementTree.getroot().addnext(element._element)
-
-    def _getChildNodes(self):
-        return self._childNodes
-
-    childNodes = property(_getChildNodes)
-
-
-def testSerializer(element):
-    rv = []
-    infosetFilter = _ihatexml.InfosetFilter(preventDoubleDashComments=True)
-
-    def serializeElement(element, indent=0):
-        if not hasattr(element, "tag"):
-            if hasattr(element, "getroot"):
-                # Full tree case
-                rv.append("#document")
-                if element.docinfo.internalDTD:
-                    if not (element.docinfo.public_id or
-                            element.docinfo.system_url):
-                        dtd_str = "<!DOCTYPE %s>" % element.docinfo.root_name
-                    else:
-                        dtd_str = """<!DOCTYPE %s "%s" "%s">""" % (
-                            element.docinfo.root_name,
-                            element.docinfo.public_id,
-                            element.docinfo.system_url)
-                    rv.append("|%s%s" % (' ' * (indent + 2), dtd_str))
-                next_element = element.getroot()
-                while next_element.getprevious() is not None:
-                    next_element = next_element.getprevious()
-                while next_element is not None:
-                    serializeElement(next_element, indent + 2)
-                    next_element = next_element.getnext()
-            elif isinstance(element, str) or isinstance(element, bytes):
-                # Text in a fragment
-                assert isinstance(element, str) or sys.version_info[0] == 2
-                rv.append("|%s\"%s\"" % (' ' * indent, element))
-            else:
-                # Fragment case
-                rv.append("#document-fragment")
-                for next_element in element:
-                    serializeElement(next_element, indent + 2)
-        elif element.tag == comment_type:
-            rv.append("|%s<!-- %s -->" % (' ' * indent, element.text))
-            if hasattr(element, "tail") and element.tail:
-                rv.append("|%s\"%s\"" % (' ' * indent, element.tail))
-        else:
-            assert isinstance(element, etree._Element)
-            nsmatch = etree_builders.tag_regexp.match(element.tag)
-            if nsmatch is not None:
-                ns = nsmatch.group(1)
-                tag = nsmatch.group(2)
-                prefix = constants.prefixes[ns]
-                rv.append("|%s<%s %s>" % (' ' * indent, prefix,
-                                          infosetFilter.fromXmlName(tag)))
-            else:
-                rv.append("|%s<%s>" % (' ' * indent,
-                                       infosetFilter.fromXmlName(element.tag)))
-
-            if hasattr(element, "attrib"):
-                attributes = []
-                for name, value in element.attrib.items():
-                    nsmatch = tag_regexp.match(name)
-                    if nsmatch is not None:
-                        ns, name = nsmatch.groups()
-                        name = infosetFilter.fromXmlName(name)
-                        prefix = constants.prefixes[ns]
-                        attr_string = "%s %s" % (prefix, name)
-                    else:
-                        attr_string = infosetFilter.fromXmlName(name)
-                    attributes.append((attr_string, value))
-
-                for name, value in sorted(attributes):
-                    rv.append('|%s%s="%s"' % (' ' * (indent + 2), name, value))
-
-            if element.text:
-                rv.append("|%s\"%s\"" % (' ' * (indent + 2), element.text))
-            indent += 2
-            for child in element:
-                serializeElement(child, indent)
-            if hasattr(element, "tail") and element.tail:
-                rv.append("|%s\"%s\"" % (' ' * (indent - 2), element.tail))
-    serializeElement(element, 0)
-
-    return "\n".join(rv)
-
-
-def tostring(element):
-    """Serialize an element and its child nodes to a string"""
-    rv = []
-
-    def serializeElement(element):
-        if not hasattr(element, "tag"):
-            if element.docinfo.internalDTD:
-                if element.docinfo.doctype:
-                    dtd_str = element.docinfo.doctype
-                else:
-                    dtd_str = "<!DOCTYPE %s>" % element.docinfo.root_name
-                rv.append(dtd_str)
-            serializeElement(element.getroot())
-
-        elif element.tag == comment_type:
-            rv.append("<!--%s-->" % (element.text,))
-
-        else:
-            # This is assumed to be an ordinary element
-            if not element.attrib:
-                rv.append("<%s>" % (element.tag,))
-            else:
-                attr = " ".join(["%s=\"%s\"" % (name, value)
-                                 for name, value in element.attrib.items()])
-                rv.append("<%s %s>" % (element.tag, attr))
-            if element.text:
-                rv.append(element.text)
-
-            for child in element:
-                serializeElement(child)
-
-            rv.append("</%s>" % (element.tag,))
-
-        if hasattr(element, "tail") and element.tail:
-            rv.append(element.tail)
-
-    serializeElement(element)
-
-    return "".join(rv)
-
-
-class TreeBuilder(base.TreeBuilder):
-    documentClass = Document
-    doctypeClass = DocumentType
-    elementClass = None
-    commentClass = None
-    fragmentClass = Document
-    implementation = etree
-
-    def __init__(self, namespaceHTMLElements, fullTree=False):
-        builder = etree_builders.getETreeModule(etree, fullTree=fullTree)
-        infosetFilter = self.infosetFilter = _ihatexml.InfosetFilter(preventDoubleDashComments=True)
-        self.namespaceHTMLElements = namespaceHTMLElements
-
-        class Attributes(dict):
-            def __init__(self, element, value=None):
-                if value is None:
-                    value = {}
-                self._element = element
-                dict.__init__(self, value)  # pylint:disable=non-parent-init-called
-                for key, value in self.items():
-                    if isinstance(key, tuple):
-                        name = "{%s}%s" % (key[2], infosetFilter.coerceAttribute(key[1]))
-                    else:
-                        name = infosetFilter.coerceAttribute(key)
-                    self._element._element.attrib[name] = value
-
-            def __setitem__(self, key, value):
-                dict.__setitem__(self, key, value)
-                if isinstance(key, tuple):
-                    name = "{%s}%s" % (key[2], infosetFilter.coerceAttribute(key[1]))
-                else:
-                    name = infosetFilter.coerceAttribute(key)
-                self._element._element.attrib[name] = value
-
-        class Element(builder.Element):
-            def __init__(self, name, namespace):
-                name = infosetFilter.coerceElement(name)
-                builder.Element.__init__(self, name, namespace=namespace)
-                self._attributes = Attributes(self)
-
-            def _setName(self, name):
-                self._name = infosetFilter.coerceElement(name)
-                self._element.tag = self._getETreeTag(
-                    self._name, self._namespace)
-
-            def _getName(self):
-                return infosetFilter.fromXmlName(self._name)
-
-            name = property(_getName, _setName)
-
-            def _getAttributes(self):
-                return self._attributes
-
-            def _setAttributes(self, attributes):
-                self._attributes = Attributes(self, attributes)
-
-            attributes = property(_getAttributes, _setAttributes)
-
-            def insertText(self, data, insertBefore=None):
-                data = infosetFilter.coerceCharacters(data)
-                builder.Element.insertText(self, data, insertBefore)
-
-            def appendChild(self, child):
-                builder.Element.appendChild(self, child)
-
-        class Comment(builder.Comment):
-            def __init__(self, data):
-                data = infosetFilter.coerceComment(data)
-                builder.Comment.__init__(self, data)
-
-            def _setData(self, data):
-                data = infosetFilter.coerceComment(data)
-                self._element.text = data
-
-            def _getData(self):
-                return self._element.text
-
-            data = property(_getData, _setData)
-
-        self.elementClass = Element
-        self.commentClass = Comment
-        # self.fragmentClass = builder.DocumentFragment
-        base.TreeBuilder.__init__(self, namespaceHTMLElements)
-
-    def reset(self):
-        base.TreeBuilder.reset(self)
-        self.insertComment = self.insertCommentInitial
-        self.initial_comments = []
-        self.doctype = None
-
-    def testSerializer(self, element):
-        return testSerializer(element)
-
-    def getDocument(self):
-        if fullTree:
-            return self.document._elementTree
-        else:
-            return self.document._elementTree.getroot()
-
-    def getFragment(self):
-        fragment = []
-        element = self.openElements[0]._element
-        if element.text:
-            fragment.append(element.text)
-        fragment.extend(list(element))
-        if element.tail:
-            fragment.append(element.tail)
-        return fragment
-
-    def insertDoctype(self, token):
-        name = token["name"]
-        publicId = token["publicId"]
-        systemId = token["systemId"]
-
-        if not name:
-            warnings.warn("lxml cannot represent empty doctype", DataLossWarning)
-            self.doctype = None
-        else:
-            coercedName = self.infosetFilter.coerceElement(name)
-            if coercedName != name:
-                warnings.warn("lxml cannot represent non-xml doctype", DataLossWarning)
-
-            doctype = self.doctypeClass(coercedName, publicId, systemId)
-            self.doctype = doctype
-
-    def insertCommentInitial(self, data, parent=None):
-        assert parent is None or parent is self.document
-        assert self.document._elementTree is None
-        self.initial_comments.append(data)
-
-    def insertCommentMain(self, data, parent=None):
-        if (parent == self.document and
-                self.document._elementTree.getroot()[-1].tag == comment_type):
-            warnings.warn("lxml cannot represent adjacent comments beyond the root elements", DataLossWarning)
-        super(TreeBuilder, self).insertComment(data, parent)
-
-    def insertRoot(self, token):
-        # Because of the way libxml2 works, it doesn't seem to be possible to
-        # alter information like the doctype after the tree has been parsed.
-        # Therefore we need to use the built-in parser to create our initial
-        # tree, after which we can add elements like normal
-        docStr = ""
-        if self.doctype:
-            assert self.doctype.name
-            docStr += "<!DOCTYPE %s" % self.doctype.name
-            if (self.doctype.publicId is not None or
-                    self.doctype.systemId is not None):
-                docStr += (' PUBLIC "%s" ' %
-                           (self.infosetFilter.coercePubid(self.doctype.publicId or "")))
-                if self.doctype.systemId:
-                    sysid = self.doctype.systemId
-                    if sysid.find("'") >= 0 and sysid.find('"') >= 0:
-                        warnings.warn("DOCTYPE system cannot contain single and double quotes", DataLossWarning)
-                        sysid = sysid.replace("'", 'U00027')
-                    if sysid.find("'") >= 0:
-                        docStr += '"%s"' % sysid
-                    else:
-                        docStr += "'%s'" % sysid
-                else:
-                    docStr += "''"
-            docStr += ">"
-            if self.doctype.name != token["name"]:
-                warnings.warn("lxml cannot represent doctype with a different name to the root element", DataLossWarning)
-        docStr += "<THIS_SHOULD_NEVER_APPEAR_PUBLICLY/>"
-        root = etree.fromstring(docStr)
-
-        # Append the initial comments:
-        for comment_token in self.initial_comments:
-            comment = self.commentClass(comment_token["data"])
-            root.addprevious(comment._element)
-
-        # Create the root document and add the ElementTree to it
-        self.document = self.documentClass()
-        self.document._elementTree = root.getroottree()
-
-        # Give the root element the right name
-        name = token["name"]
-        namespace = token.get("namespace", self.defaultNamespace)
-        if namespace is None:
-            etree_tag = name
-        else:
-            etree_tag = "{%s}%s" % (namespace, name)
-        root.tag = etree_tag
-
-        # Add the root element to the internal child/open data structures
-        root_element = self.elementClass(name, namespace)
-        root_element._element = root
-        self.document._childNodes.append(root_element)
-        self.openElements.append(root_element)
-
-        # Reset to the default insert comment function
-        self.insertComment = self.insertCommentMain
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treewalkers/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treewalkers/__init__.py
deleted file mode 100644
index 9bec207..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treewalkers/__init__.py
+++ /dev/null
@@ -1,154 +0,0 @@
-"""A collection of modules for iterating through different kinds of
-tree, generating tokens identical to those produced by the tokenizer
-module.
-
-To create a tree walker for a new type of tree, you need to do
-implement a tree walker object (called TreeWalker by convention) that
-implements a 'serialize' method taking a tree as sole argument and
-returning an iterator generating tokens.
-"""
-
-from __future__ import absolute_import, division, unicode_literals
-
-from .. import constants
-from .._utils import default_etree
-
-__all__ = ["getTreeWalker", "pprint"]
-
-treeWalkerCache = {}
-
-
-def getTreeWalker(treeType, implementation=None, **kwargs):
-    """Get a TreeWalker class for various types of tree with built-in support
-
-    :arg str treeType: the name of the tree type required (case-insensitive).
-        Supported values are:
-
-        * "dom": The xml.dom.minidom DOM implementation
-        * "etree": A generic walker for tree implementations exposing an
-          elementtree-like interface (known to work with ElementTree,
-          cElementTree and lxml.etree).
-        * "lxml": Optimized walker for lxml.etree
-        * "genshi": a Genshi stream
-
-    :arg implementation: A module implementing the tree type e.g.
-        xml.etree.ElementTree or cElementTree (Currently applies to the "etree"
-        tree type only).
-
-    :arg kwargs: keyword arguments passed to the etree walker--for other
-        walkers, this has no effect
-
-    :returns: a TreeWalker class
-
-    """
-
-    treeType = treeType.lower()
-    if treeType not in treeWalkerCache:
-        if treeType == "dom":
-            from . import dom
-            treeWalkerCache[treeType] = dom.TreeWalker
-        elif treeType == "genshi":
-            from . import genshi
-            treeWalkerCache[treeType] = genshi.TreeWalker
-        elif treeType == "lxml":
-            from . import etree_lxml
-            treeWalkerCache[treeType] = etree_lxml.TreeWalker
-        elif treeType == "etree":
-            from . import etree
-            if implementation is None:
-                implementation = default_etree
-            # XXX: NEVER cache here, caching is done in the etree submodule
-            return etree.getETreeModule(implementation, **kwargs).TreeWalker
-    return treeWalkerCache.get(treeType)
-
-
-def concatenateCharacterTokens(tokens):
-    pendingCharacters = []
-    for token in tokens:
-        type = token["type"]
-        if type in ("Characters", "SpaceCharacters"):
-            pendingCharacters.append(token["data"])
-        else:
-            if pendingCharacters:
-                yield {"type": "Characters", "data": "".join(pendingCharacters)}
-                pendingCharacters = []
-            yield token
-    if pendingCharacters:
-        yield {"type": "Characters", "data": "".join(pendingCharacters)}
-
-
-def pprint(walker):
-    """Pretty printer for tree walkers
-
-    Takes a TreeWalker instance and pretty prints the output of walking the tree.
-
-    :arg walker: a TreeWalker instance
-
-    """
-    output = []
-    indent = 0
-    for token in concatenateCharacterTokens(walker):
-        type = token["type"]
-        if type in ("StartTag", "EmptyTag"):
-            # tag name
-            if token["namespace"] and token["namespace"] != constants.namespaces["html"]:
-                if token["namespace"] in constants.prefixes:
-                    ns = constants.prefixes[token["namespace"]]
-                else:
-                    ns = token["namespace"]
-                name = "%s %s" % (ns, token["name"])
-            else:
-                name = token["name"]
-            output.append("%s<%s>" % (" " * indent, name))
-            indent += 2
-            # attributes (sorted for consistent ordering)
-            attrs = token["data"]
-            for (namespace, localname), value in sorted(attrs.items()):
-                if namespace:
-                    if namespace in constants.prefixes:
-                        ns = constants.prefixes[namespace]
-                    else:
-                        ns = namespace
-                    name = "%s %s" % (ns, localname)
-                else:
-                    name = localname
-                output.append("%s%s=\"%s\"" % (" " * indent, name, value))
-            # self-closing
-            if type == "EmptyTag":
-                indent -= 2
-
-        elif type == "EndTag":
-            indent -= 2
-
-        elif type == "Comment":
-            output.append("%s<!-- %s -->" % (" " * indent, token["data"]))
-
-        elif type == "Doctype":
-            if token["name"]:
-                if token["publicId"]:
-                    output.append("""%s<!DOCTYPE %s "%s" "%s">""" %
-                                  (" " * indent,
-                                   token["name"],
-                                   token["publicId"],
-                                   token["systemId"] if token["systemId"] else ""))
-                elif token["systemId"]:
-                    output.append("""%s<!DOCTYPE %s "" "%s">""" %
-                                  (" " * indent,
-                                   token["name"],
-                                   token["systemId"]))
-                else:
-                    output.append("%s<!DOCTYPE %s>" % (" " * indent,
-                                                       token["name"]))
-            else:
-                output.append("%s<!DOCTYPE >" % (" " * indent,))
-
-        elif type == "Characters":
-            output.append("%s\"%s\"" % (" " * indent, token["data"]))
-
-        elif type == "SpaceCharacters":
-            assert False, "concatenateCharacterTokens should have got rid of all Space tokens"
-
-        else:
-            raise ValueError("Unknown token type, %s" % type)
-
-    return "\n".join(output)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treewalkers/base.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treewalkers/base.py
deleted file mode 100644
index 80c474c..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treewalkers/base.py
+++ /dev/null
@@ -1,252 +0,0 @@
-from __future__ import absolute_import, division, unicode_literals
-
-from xml.dom import Node
-from ..constants import namespaces, voidElements, spaceCharacters
-
-__all__ = ["DOCUMENT", "DOCTYPE", "TEXT", "ELEMENT", "COMMENT", "ENTITY", "UNKNOWN",
-           "TreeWalker", "NonRecursiveTreeWalker"]
-
-DOCUMENT = Node.DOCUMENT_NODE
-DOCTYPE = Node.DOCUMENT_TYPE_NODE
-TEXT = Node.TEXT_NODE
-ELEMENT = Node.ELEMENT_NODE
-COMMENT = Node.COMMENT_NODE
-ENTITY = Node.ENTITY_NODE
-UNKNOWN = "<#UNKNOWN#>"
-
-spaceCharacters = "".join(spaceCharacters)
-
-
-class TreeWalker(object):
-    """Walks a tree yielding tokens
-
-    Tokens are dicts that all have a ``type`` field specifying the type of the
-    token.
-
-    """
-    def __init__(self, tree):
-        """Creates a TreeWalker
-
-        :arg tree: the tree to walk
-
-        """
-        self.tree = tree
-
-    def __iter__(self):
-        raise NotImplementedError
-
-    def error(self, msg):
-        """Generates an error token with the given message
-
-        :arg msg: the error message
-
-        :returns: SerializeError token
-
-        """
-        return {"type": "SerializeError", "data": msg}
-
-    def emptyTag(self, namespace, name, attrs, hasChildren=False):
-        """Generates an EmptyTag token
-
-        :arg namespace: the namespace of the token--can be ``None``
-
-        :arg name: the name of the element
-
-        :arg attrs: the attributes of the element as a dict
-
-        :arg hasChildren: whether or not to yield a SerializationError because
-            this tag shouldn't have children
-
-        :returns: EmptyTag token
-
-        """
-        yield {"type": "EmptyTag", "name": name,
-               "namespace": namespace,
-               "data": attrs}
-        if hasChildren:
-            yield self.error("Void element has children")
-
-    def startTag(self, namespace, name, attrs):
-        """Generates a StartTag token
-
-        :arg namespace: the namespace of the token--can be ``None``
-
-        :arg name: the name of the element
-
-        :arg attrs: the attributes of the element as a dict
-
-        :returns: StartTag token
-
-        """
-        return {"type": "StartTag",
-                "name": name,
-                "namespace": namespace,
-                "data": attrs}
-
-    def endTag(self, namespace, name):
-        """Generates an EndTag token
-
-        :arg namespace: the namespace of the token--can be ``None``
-
-        :arg name: the name of the element
-
-        :returns: EndTag token
-
-        """
-        return {"type": "EndTag",
-                "name": name,
-                "namespace": namespace}
-
-    def text(self, data):
-        """Generates SpaceCharacters and Characters tokens
-
-        Depending on what's in the data, this generates one or more
-        ``SpaceCharacters`` and ``Characters`` tokens.
-
-        For example:
-
-            >>> from html5lib.treewalkers.base import TreeWalker
-            >>> # Give it an empty tree just so it instantiates
-            >>> walker = TreeWalker([])
-            >>> list(walker.text(''))
-            []
-            >>> list(walker.text('  '))
-            [{u'data': '  ', u'type': u'SpaceCharacters'}]
-            >>> list(walker.text(' abc '))  # doctest: +NORMALIZE_WHITESPACE
-            [{u'data': ' ', u'type': u'SpaceCharacters'},
-            {u'data': u'abc', u'type': u'Characters'},
-            {u'data': u' ', u'type': u'SpaceCharacters'}]
-
-        :arg data: the text data
-
-        :returns: one or more ``SpaceCharacters`` and ``Characters`` tokens
-
-        """
-        data = data
-        middle = data.lstrip(spaceCharacters)
-        left = data[:len(data) - len(middle)]
-        if left:
-            yield {"type": "SpaceCharacters", "data": left}
-        data = middle
-        middle = data.rstrip(spaceCharacters)
-        right = data[len(middle):]
-        if middle:
-            yield {"type": "Characters", "data": middle}
-        if right:
-            yield {"type": "SpaceCharacters", "data": right}
-
-    def comment(self, data):
-        """Generates a Comment token
-
-        :arg data: the comment
-
-        :returns: Comment token
-
-        """
-        return {"type": "Comment", "data": data}
-
-    def doctype(self, name, publicId=None, systemId=None):
-        """Generates a Doctype token
-
-        :arg name:
-
-        :arg publicId:
-
-        :arg systemId:
-
-        :returns: the Doctype token
-
-        """
-        return {"type": "Doctype",
-                "name": name,
-                "publicId": publicId,
-                "systemId": systemId}
-
-    def entity(self, name):
-        """Generates an Entity token
-
-        :arg name: the entity name
-
-        :returns: an Entity token
-
-        """
-        return {"type": "Entity", "name": name}
-
-    def unknown(self, nodeType):
-        """Handles unknown node types"""
-        return self.error("Unknown node type: " + nodeType)
-
-
-class NonRecursiveTreeWalker(TreeWalker):
-    def getNodeDetails(self, node):
-        raise NotImplementedError
-
-    def getFirstChild(self, node):
-        raise NotImplementedError
-
-    def getNextSibling(self, node):
-        raise NotImplementedError
-
-    def getParentNode(self, node):
-        raise NotImplementedError
-
-    def __iter__(self):
-        currentNode = self.tree
-        while currentNode is not None:
-            details = self.getNodeDetails(currentNode)
-            type, details = details[0], details[1:]
-            hasChildren = False
-
-            if type == DOCTYPE:
-                yield self.doctype(*details)
-
-            elif type == TEXT:
-                for token in self.text(*details):
-                    yield token
-
-            elif type == ELEMENT:
-                namespace, name, attributes, hasChildren = details
-                if (not namespace or namespace == namespaces["html"]) and name in voidElements:
-                    for token in self.emptyTag(namespace, name, attributes,
-                                               hasChildren):
-                        yield token
-                    hasChildren = False
-                else:
-                    yield self.startTag(namespace, name, attributes)
-
-            elif type == COMMENT:
-                yield self.comment(details[0])
-
-            elif type == ENTITY:
-                yield self.entity(details[0])
-
-            elif type == DOCUMENT:
-                hasChildren = True
-
-            else:
-                yield self.unknown(details[0])
-
-            if hasChildren:
-                firstChild = self.getFirstChild(currentNode)
-            else:
-                firstChild = None
-
-            if firstChild is not None:
-                currentNode = firstChild
-            else:
-                while currentNode is not None:
-                    details = self.getNodeDetails(currentNode)
-                    type, details = details[0], details[1:]
-                    if type == ELEMENT:
-                        namespace, name, attributes, hasChildren = details
-                        if (namespace and namespace != namespaces["html"]) or name not in voidElements:
-                            yield self.endTag(namespace, name)
-                    if self.tree is currentNode:
-                        currentNode = None
-                        break
-                    nextSibling = self.getNextSibling(currentNode)
-                    if nextSibling is not None:
-                        currentNode = nextSibling
-                        break
-                    else:
-                        currentNode = self.getParentNode(currentNode)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treewalkers/dom.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treewalkers/dom.py
deleted file mode 100644
index b0c89b0..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treewalkers/dom.py
+++ /dev/null
@@ -1,43 +0,0 @@
-from __future__ import absolute_import, division, unicode_literals
-
-from xml.dom import Node
-
-from . import base
-
-
-class TreeWalker(base.NonRecursiveTreeWalker):
-    def getNodeDetails(self, node):
-        if node.nodeType == Node.DOCUMENT_TYPE_NODE:
-            return base.DOCTYPE, node.name, node.publicId, node.systemId
-
-        elif node.nodeType in (Node.TEXT_NODE, Node.CDATA_SECTION_NODE):
-            return base.TEXT, node.nodeValue
-
-        elif node.nodeType == Node.ELEMENT_NODE:
-            attrs = {}
-            for attr in list(node.attributes.keys()):
-                attr = node.getAttributeNode(attr)
-                if attr.namespaceURI:
-                    attrs[(attr.namespaceURI, attr.localName)] = attr.value
-                else:
-                    attrs[(None, attr.name)] = attr.value
-            return (base.ELEMENT, node.namespaceURI, node.nodeName,
-                    attrs, node.hasChildNodes())
-
-        elif node.nodeType == Node.COMMENT_NODE:
-            return base.COMMENT, node.nodeValue
-
-        elif node.nodeType in (Node.DOCUMENT_NODE, Node.DOCUMENT_FRAGMENT_NODE):
-            return (base.DOCUMENT,)
-
-        else:
-            return base.UNKNOWN, node.nodeType
-
-    def getFirstChild(self, node):
-        return node.firstChild
-
-    def getNextSibling(self, node):
-        return node.nextSibling
-
-    def getParentNode(self, node):
-        return node.parentNode
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treewalkers/etree.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treewalkers/etree.py
deleted file mode 100644
index 95fc0c1..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treewalkers/etree.py
+++ /dev/null
@@ -1,130 +0,0 @@
-from __future__ import absolute_import, division, unicode_literals
-
-from collections import OrderedDict
-import re
-
-from pip._vendor.six import string_types
-
-from . import base
-from .._utils import moduleFactoryFactory
-
-tag_regexp = re.compile("{([^}]*)}(.*)")
-
-
-def getETreeBuilder(ElementTreeImplementation):
-    ElementTree = ElementTreeImplementation
-    ElementTreeCommentType = ElementTree.Comment("asd").tag
-
-    class TreeWalker(base.NonRecursiveTreeWalker):  # pylint:disable=unused-variable
-        """Given the particular ElementTree representation, this implementation,
-        to avoid using recursion, returns "nodes" as tuples with the following
-        content:
-
-        1. The current element
-
-        2. The index of the element relative to its parent
-
-        3. A stack of ancestor elements
-
-        4. A flag "text", "tail" or None to indicate if the current node is a
-           text node; either the text or tail of the current element (1)
-        """
-        def getNodeDetails(self, node):
-            if isinstance(node, tuple):  # It might be the root Element
-                elt, _, _, flag = node
-                if flag in ("text", "tail"):
-                    return base.TEXT, getattr(elt, flag)
-                else:
-                    node = elt
-
-            if not(hasattr(node, "tag")):
-                node = node.getroot()
-
-            if node.tag in ("DOCUMENT_ROOT", "DOCUMENT_FRAGMENT"):
-                return (base.DOCUMENT,)
-
-            elif node.tag == "<!DOCTYPE>":
-                return (base.DOCTYPE, node.text,
-                        node.get("publicId"), node.get("systemId"))
-
-            elif node.tag == ElementTreeCommentType:
-                return base.COMMENT, node.text
-
-            else:
-                assert isinstance(node.tag, string_types), type(node.tag)
-                # This is assumed to be an ordinary element
-                match = tag_regexp.match(node.tag)
-                if match:
-                    namespace, tag = match.groups()
-                else:
-                    namespace = None
-                    tag = node.tag
-                attrs = OrderedDict()
-                for name, value in list(node.attrib.items()):
-                    match = tag_regexp.match(name)
-                    if match:
-                        attrs[(match.group(1), match.group(2))] = value
-                    else:
-                        attrs[(None, name)] = value
-                return (base.ELEMENT, namespace, tag,
-                        attrs, len(node) or node.text)
-
-        def getFirstChild(self, node):
-            if isinstance(node, tuple):
-                element, key, parents, flag = node
-            else:
-                element, key, parents, flag = node, None, [], None
-
-            if flag in ("text", "tail"):
-                return None
-            else:
-                if element.text:
-                    return element, key, parents, "text"
-                elif len(element):
-                    parents.append(element)
-                    return element[0], 0, parents, None
-                else:
-                    return None
-
-        def getNextSibling(self, node):
-            if isinstance(node, tuple):
-                element, key, parents, flag = node
-            else:
-                return None
-
-            if flag == "text":
-                if len(element):
-                    parents.append(element)
-                    return element[0], 0, parents, None
-                else:
-                    return None
-            else:
-                if element.tail and flag != "tail":
-                    return element, key, parents, "tail"
-                elif key < len(parents[-1]) - 1:
-                    return parents[-1][key + 1], key + 1, parents, None
-                else:
-                    return None
-
-        def getParentNode(self, node):
-            if isinstance(node, tuple):
-                element, key, parents, flag = node
-            else:
-                return None
-
-            if flag == "text":
-                if not parents:
-                    return element
-                else:
-                    return element, key, parents, None
-            else:
-                parent = parents.pop()
-                if not parents:
-                    return parent
-                else:
-                    assert list(parents[-1]).count(parent) == 1
-                    return parent, list(parents[-1]).index(parent), parents, None
-
-    return locals()
-
-getETreeModule = moduleFactoryFactory(getETreeBuilder)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treewalkers/etree_lxml.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treewalkers/etree_lxml.py
deleted file mode 100644
index e81ddf3..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treewalkers/etree_lxml.py
+++ /dev/null
@@ -1,213 +0,0 @@
-from __future__ import absolute_import, division, unicode_literals
-from pip._vendor.six import text_type
-
-from lxml import etree
-from ..treebuilders.etree import tag_regexp
-
-from . import base
-
-from .. import _ihatexml
-
-
-def ensure_str(s):
-    if s is None:
-        return None
-    elif isinstance(s, text_type):
-        return s
-    else:
-        return s.decode("ascii", "strict")
-
-
-class Root(object):
-    def __init__(self, et):
-        self.elementtree = et
-        self.children = []
-
-        try:
-            if et.docinfo.internalDTD:
-                self.children.append(Doctype(self,
-                                             ensure_str(et.docinfo.root_name),
-                                             ensure_str(et.docinfo.public_id),
-                                             ensure_str(et.docinfo.system_url)))
-        except AttributeError:
-            pass
-
-        try:
-            node = et.getroot()
-        except AttributeError:
-            node = et
-
-        while node.getprevious() is not None:
-            node = node.getprevious()
-        while node is not None:
-            self.children.append(node)
-            node = node.getnext()
-
-        self.text = None
-        self.tail = None
-
-    def __getitem__(self, key):
-        return self.children[key]
-
-    def getnext(self):
-        return None
-
-    def __len__(self):
-        return 1
-
-
-class Doctype(object):
-    def __init__(self, root_node, name, public_id, system_id):
-        self.root_node = root_node
-        self.name = name
-        self.public_id = public_id
-        self.system_id = system_id
-
-        self.text = None
-        self.tail = None
-
-    def getnext(self):
-        return self.root_node.children[1]
-
-
-class FragmentRoot(Root):
-    def __init__(self, children):
-        self.children = [FragmentWrapper(self, child) for child in children]
-        self.text = self.tail = None
-
-    def getnext(self):
-        return None
-
-
-class FragmentWrapper(object):
-    def __init__(self, fragment_root, obj):
-        self.root_node = fragment_root
-        self.obj = obj
-        if hasattr(self.obj, 'text'):
-            self.text = ensure_str(self.obj.text)
-        else:
-            self.text = None
-        if hasattr(self.obj, 'tail'):
-            self.tail = ensure_str(self.obj.tail)
-        else:
-            self.tail = None
-
-    def __getattr__(self, name):
-        return getattr(self.obj, name)
-
-    def getnext(self):
-        siblings = self.root_node.children
-        idx = siblings.index(self)
-        if idx < len(siblings) - 1:
-            return siblings[idx + 1]
-        else:
-            return None
-
-    def __getitem__(self, key):
-        return self.obj[key]
-
-    def __bool__(self):
-        return bool(self.obj)
-
-    def getparent(self):
-        return None
-
-    def __str__(self):
-        return str(self.obj)
-
-    def __unicode__(self):
-        return str(self.obj)
-
-    def __len__(self):
-        return len(self.obj)
-
-
-class TreeWalker(base.NonRecursiveTreeWalker):
-    def __init__(self, tree):
-        # pylint:disable=redefined-variable-type
-        if isinstance(tree, list):
-            self.fragmentChildren = set(tree)
-            tree = FragmentRoot(tree)
-        else:
-            self.fragmentChildren = set()
-            tree = Root(tree)
-        base.NonRecursiveTreeWalker.__init__(self, tree)
-        self.filter = _ihatexml.InfosetFilter()
-
-    def getNodeDetails(self, node):
-        if isinstance(node, tuple):  # Text node
-            node, key = node
-            assert key in ("text", "tail"), "Text nodes are text or tail, found %s" % key
-            return base.TEXT, ensure_str(getattr(node, key))
-
-        elif isinstance(node, Root):
-            return (base.DOCUMENT,)
-
-        elif isinstance(node, Doctype):
-            return base.DOCTYPE, node.name, node.public_id, node.system_id
-
-        elif isinstance(node, FragmentWrapper) and not hasattr(node, "tag"):
-            return base.TEXT, ensure_str(node.obj)
-
-        elif node.tag == etree.Comment:
-            return base.COMMENT, ensure_str(node.text)
-
-        elif node.tag == etree.Entity:
-            return base.ENTITY, ensure_str(node.text)[1:-1]  # strip &;
-
-        else:
-            # This is assumed to be an ordinary element
-            match = tag_regexp.match(ensure_str(node.tag))
-            if match:
-                namespace, tag = match.groups()
-            else:
-                namespace = None
-                tag = ensure_str(node.tag)
-            attrs = {}
-            for name, value in list(node.attrib.items()):
-                name = ensure_str(name)
-                value = ensure_str(value)
-                match = tag_regexp.match(name)
-                if match:
-                    attrs[(match.group(1), match.group(2))] = value
-                else:
-                    attrs[(None, name)] = value
-            return (base.ELEMENT, namespace, self.filter.fromXmlName(tag),
-                    attrs, len(node) > 0 or node.text)
-
-    def getFirstChild(self, node):
-        assert not isinstance(node, tuple), "Text nodes have no children"
-
-        assert len(node) or node.text, "Node has no children"
-        if node.text:
-            return (node, "text")
-        else:
-            return node[0]
-
-    def getNextSibling(self, node):
-        if isinstance(node, tuple):  # Text node
-            node, key = node
-            assert key in ("text", "tail"), "Text nodes are text or tail, found %s" % key
-            if key == "text":
-                # XXX: we cannot use a "bool(node) and node[0] or None" construct here
-                # because node[0] might evaluate to False if it has no child element
-                if len(node):
-                    return node[0]
-                else:
-                    return None
-            else:  # tail
-                return node.getnext()
-
-        return (node, "tail") if node.tail else node.getnext()
-
-    def getParentNode(self, node):
-        if isinstance(node, tuple):  # Text node
-            node, key = node
-            assert key in ("text", "tail"), "Text nodes are text or tail, found %s" % key
-            if key == "text":
-                return node
-            # else: fallback to "normal" processing
-        elif node in self.fragmentChildren:
-            return None
-
-        return node.getparent()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treewalkers/genshi.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treewalkers/genshi.py
deleted file mode 100644
index 7483be2..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/html5lib/treewalkers/genshi.py
+++ /dev/null
@@ -1,69 +0,0 @@
-from __future__ import absolute_import, division, unicode_literals
-
-from genshi.core import QName
-from genshi.core import START, END, XML_NAMESPACE, DOCTYPE, TEXT
-from genshi.core import START_NS, END_NS, START_CDATA, END_CDATA, PI, COMMENT
-
-from . import base
-
-from ..constants import voidElements, namespaces
-
-
-class TreeWalker(base.TreeWalker):
-    def __iter__(self):
-        # Buffer the events so we can pass in the following one
-        previous = None
-        for event in self.tree:
-            if previous is not None:
-                for token in self.tokens(previous, event):
-                    yield token
-            previous = event
-
-        # Don't forget the final event!
-        if previous is not None:
-            for token in self.tokens(previous, None):
-                yield token
-
-    def tokens(self, event, next):
-        kind, data, _ = event
-        if kind == START:
-            tag, attribs = data
-            name = tag.localname
-            namespace = tag.namespace
-            converted_attribs = {}
-            for k, v in attribs:
-                if isinstance(k, QName):
-                    converted_attribs[(k.namespace, k.localname)] = v
-                else:
-                    converted_attribs[(None, k)] = v
-
-            if namespace == namespaces["html"] and name in voidElements:
-                for token in self.emptyTag(namespace, name, converted_attribs,
-                                           not next or next[0] != END or
-                                           next[1] != tag):
-                    yield token
-            else:
-                yield self.startTag(namespace, name, converted_attribs)
-
-        elif kind == END:
-            name = data.localname
-            namespace = data.namespace
-            if namespace != namespaces["html"] or name not in voidElements:
-                yield self.endTag(namespace, name)
-
-        elif kind == COMMENT:
-            yield self.comment(data)
-
-        elif kind == TEXT:
-            for token in self.text(data):
-                yield token
-
-        elif kind == DOCTYPE:
-            yield self.doctype(*data)
-
-        elif kind in (XML_NAMESPACE, DOCTYPE, START_NS, END_NS,
-                      START_CDATA, END_CDATA, PI):
-            pass
-
-        else:
-            yield self.unknown(kind)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/idna/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/idna/__init__.py
deleted file mode 100644
index 847bf93..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/idna/__init__.py
+++ /dev/null
@@ -1,2 +0,0 @@
-from .package_data import __version__
-from .core import *
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/idna/codec.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/idna/codec.py
deleted file mode 100644
index 98c65ea..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/idna/codec.py
+++ /dev/null
@@ -1,118 +0,0 @@
-from .core import encode, decode, alabel, ulabel, IDNAError
-import codecs
-import re
-
-_unicode_dots_re = re.compile(u'[\u002e\u3002\uff0e\uff61]')
-
-class Codec(codecs.Codec):
-
-    def encode(self, data, errors='strict'):
-
-        if errors != 'strict':
-            raise IDNAError("Unsupported error handling \"{0}\"".format(errors))
-
-        if not data:
-            return "", 0
-
-        return encode(data), len(data)
-
-    def decode(self, data, errors='strict'):
-
-        if errors != 'strict':
-            raise IDNAError("Unsupported error handling \"{0}\"".format(errors))
-
-        if not data:
-            return u"", 0
-
-        return decode(data), len(data)
-
-class IncrementalEncoder(codecs.BufferedIncrementalEncoder):
-    def _buffer_encode(self, data, errors, final):
-        if errors != 'strict':
-            raise IDNAError("Unsupported error handling \"{0}\"".format(errors))
-
-        if not data:
-            return ("", 0)
-
-        labels = _unicode_dots_re.split(data)
-        trailing_dot = u''
-        if labels:
-            if not labels[-1]:
-                trailing_dot = '.'
-                del labels[-1]
-            elif not final:
-                # Keep potentially unfinished label until the next call
-                del labels[-1]
-                if labels:
-                    trailing_dot = '.'
-
-        result = []
-        size = 0
-        for label in labels:
-            result.append(alabel(label))
-            if size:
-                size += 1
-            size += len(label)
-
-        # Join with U+002E
-        result = ".".join(result) + trailing_dot
-        size += len(trailing_dot)
-        return (result, size)
-
-class IncrementalDecoder(codecs.BufferedIncrementalDecoder):
-    def _buffer_decode(self, data, errors, final):
-        if errors != 'strict':
-            raise IDNAError("Unsupported error handling \"{0}\"".format(errors))
-
-        if not data:
-            return (u"", 0)
-
-        # IDNA allows decoding to operate on Unicode strings, too.
-        if isinstance(data, unicode):
-            labels = _unicode_dots_re.split(data)
-        else:
-            # Must be ASCII string
-            data = str(data)
-            unicode(data, "ascii")
-            labels = data.split(".")
-
-        trailing_dot = u''
-        if labels:
-            if not labels[-1]:
-                trailing_dot = u'.'
-                del labels[-1]
-            elif not final:
-                # Keep potentially unfinished label until the next call
-                del labels[-1]
-                if labels:
-                    trailing_dot = u'.'
-
-        result = []
-        size = 0
-        for label in labels:
-            result.append(ulabel(label))
-            if size:
-                size += 1
-            size += len(label)
-
-        result = u".".join(result) + trailing_dot
-        size += len(trailing_dot)
-        return (result, size)
-
-
-class StreamWriter(Codec, codecs.StreamWriter):
-    pass
-
-class StreamReader(Codec, codecs.StreamReader):
-    pass
-
-def getregentry():
-    return codecs.CodecInfo(
-        name='idna',
-        encode=Codec().encode,
-        decode=Codec().decode,
-        incrementalencoder=IncrementalEncoder,
-        incrementaldecoder=IncrementalDecoder,
-        streamwriter=StreamWriter,
-        streamreader=StreamReader,
-    )
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/idna/compat.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/idna/compat.py
deleted file mode 100644
index 4d47f33..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/idna/compat.py
+++ /dev/null
@@ -1,12 +0,0 @@
-from .core import *
-from .codec import *
-
-def ToASCII(label):
-    return encode(label)
-
-def ToUnicode(label):
-    return decode(label)
-
-def nameprep(s):
-    raise NotImplementedError("IDNA 2008 does not utilise nameprep protocol")
-
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/idna/core.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/idna/core.py
deleted file mode 100644
index 104624a..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/idna/core.py
+++ /dev/null
@@ -1,396 +0,0 @@
-from . import idnadata
-import bisect
-import unicodedata
-import re
-import sys
-from .intranges import intranges_contain
-
-_virama_combining_class = 9
-_alabel_prefix = b'xn--'
-_unicode_dots_re = re.compile(u'[\u002e\u3002\uff0e\uff61]')
-
-if sys.version_info[0] == 3:
-    unicode = str
-    unichr = chr
-
-class IDNAError(UnicodeError):
-    """ Base exception for all IDNA-encoding related problems """
-    pass
-
-
-class IDNABidiError(IDNAError):
-    """ Exception when bidirectional requirements are not satisfied """
-    pass
-
-
-class InvalidCodepoint(IDNAError):
-    """ Exception when a disallowed or unallocated codepoint is used """
-    pass
-
-
-class InvalidCodepointContext(IDNAError):
-    """ Exception when the codepoint is not valid in the context it is used """
-    pass
-
-
-def _combining_class(cp):
-    v = unicodedata.combining(unichr(cp))
-    if v == 0:
-        if not unicodedata.name(unichr(cp)):
-            raise ValueError("Unknown character in unicodedata")
-    return v
-
-def _is_script(cp, script):
-    return intranges_contain(ord(cp), idnadata.scripts[script])
-
-def _punycode(s):
-    return s.encode('punycode')
-
-def _unot(s):
-    return 'U+{0:04X}'.format(s)
-
-
-def valid_label_length(label):
-
-    if len(label) > 63:
-        return False
-    return True
-
-
-def valid_string_length(label, trailing_dot):
-
-    if len(label) > (254 if trailing_dot else 253):
-        return False
-    return True
-
-
-def check_bidi(label, check_ltr=False):
-
-    # Bidi rules should only be applied if string contains RTL characters
-    bidi_label = False
-    for (idx, cp) in enumerate(label, 1):
-        direction = unicodedata.bidirectional(cp)
-        if direction == '':
-            # String likely comes from a newer version of Unicode
-            raise IDNABidiError('Unknown directionality in label {0} at position {1}'.format(repr(label), idx))
-        if direction in ['R', 'AL', 'AN']:
-            bidi_label = True
-    if not bidi_label and not check_ltr:
-        return True
-
-    # Bidi rule 1
-    direction = unicodedata.bidirectional(label[0])
-    if direction in ['R', 'AL']:
-        rtl = True
-    elif direction == 'L':
-        rtl = False
-    else:
-        raise IDNABidiError('First codepoint in label {0} must be directionality L, R or AL'.format(repr(label)))
-
-    valid_ending = False
-    number_type = False
-    for (idx, cp) in enumerate(label, 1):
-        direction = unicodedata.bidirectional(cp)
-
-        if rtl:
-            # Bidi rule 2
-            if not direction in ['R', 'AL', 'AN', 'EN', 'ES', 'CS', 'ET', 'ON', 'BN', 'NSM']:
-                raise IDNABidiError('Invalid direction for codepoint at position {0} in a right-to-left label'.format(idx))
-            # Bidi rule 3
-            if direction in ['R', 'AL', 'EN', 'AN']:
-                valid_ending = True
-            elif direction != 'NSM':
-                valid_ending = False
-            # Bidi rule 4
-            if direction in ['AN', 'EN']:
-                if not number_type:
-                    number_type = direction
-                else:
-                    if number_type != direction:
-                        raise IDNABidiError('Can not mix numeral types in a right-to-left label')
-        else:
-            # Bidi rule 5
-            if not direction in ['L', 'EN', 'ES', 'CS', 'ET', 'ON', 'BN', 'NSM']:
-                raise IDNABidiError('Invalid direction for codepoint at position {0} in a left-to-right label'.format(idx))
-            # Bidi rule 6
-            if direction in ['L', 'EN']:
-                valid_ending = True
-            elif direction != 'NSM':
-                valid_ending = False
-
-    if not valid_ending:
-        raise IDNABidiError('Label ends with illegal codepoint directionality')
-
-    return True
-
-
-def check_initial_combiner(label):
-
-    if unicodedata.category(label[0])[0] == 'M':
-        raise IDNAError('Label begins with an illegal combining character')
-    return True
-
-
-def check_hyphen_ok(label):
-
-    if label[2:4] == '--':
-        raise IDNAError('Label has disallowed hyphens in 3rd and 4th position')
-    if label[0] == '-' or label[-1] == '-':
-        raise IDNAError('Label must not start or end with a hyphen')
-    return True
-
-
-def check_nfc(label):
-
-    if unicodedata.normalize('NFC', label) != label:
-        raise IDNAError('Label must be in Normalization Form C')
-
-
-def valid_contextj(label, pos):
-
-    cp_value = ord(label[pos])
-
-    if cp_value == 0x200c:
-
-        if pos > 0:
-            if _combining_class(ord(label[pos - 1])) == _virama_combining_class:
-                return True
-
-        ok = False
-        for i in range(pos-1, -1, -1):
-            joining_type = idnadata.joining_types.get(ord(label[i]))
-            if joining_type == ord('T'):
-                continue
-            if joining_type in [ord('L'), ord('D')]:
-                ok = True
-                break
-
-        if not ok:
-            return False
-
-        ok = False
-        for i in range(pos+1, len(label)):
-            joining_type = idnadata.joining_types.get(ord(label[i]))
-            if joining_type == ord('T'):
-                continue
-            if joining_type in [ord('R'), ord('D')]:
-                ok = True
-                break
-        return ok
-
-    if cp_value == 0x200d:
-
-        if pos > 0:
-            if _combining_class(ord(label[pos - 1])) == _virama_combining_class:
-                return True
-        return False
-
-    else:
-
-        return False
-
-
-def valid_contexto(label, pos, exception=False):
-
-    cp_value = ord(label[pos])
-
-    if cp_value == 0x00b7:
-        if 0 < pos < len(label)-1:
-            if ord(label[pos - 1]) == 0x006c and ord(label[pos + 1]) == 0x006c:
-                return True
-        return False
-
-    elif cp_value == 0x0375:
-        if pos < len(label)-1 and len(label) > 1:
-            return _is_script(label[pos + 1], 'Greek')
-        return False
-
-    elif cp_value == 0x05f3 or cp_value == 0x05f4:
-        if pos > 0:
-            return _is_script(label[pos - 1], 'Hebrew')
-        return False
-
-    elif cp_value == 0x30fb:
-        for cp in label:
-            if cp == u'\u30fb':
-                continue
-            if _is_script(cp, 'Hiragana') or _is_script(cp, 'Katakana') or _is_script(cp, 'Han'):
-                return True
-        return False
-
-    elif 0x660 <= cp_value <= 0x669:
-        for cp in label:
-            if 0x6f0 <= ord(cp) <= 0x06f9:
-                return False
-        return True
-
-    elif 0x6f0 <= cp_value <= 0x6f9:
-        for cp in label:
-            if 0x660 <= ord(cp) <= 0x0669:
-                return False
-        return True
-
-
-def check_label(label):
-
-    if isinstance(label, (bytes, bytearray)):
-        label = label.decode('utf-8')
-    if len(label) == 0:
-        raise IDNAError('Empty Label')
-
-    check_nfc(label)
-    check_hyphen_ok(label)
-    check_initial_combiner(label)
-
-    for (pos, cp) in enumerate(label):
-        cp_value = ord(cp)
-        if intranges_contain(cp_value, idnadata.codepoint_classes['PVALID']):
-            continue
-        elif intranges_contain(cp_value, idnadata.codepoint_classes['CONTEXTJ']):
-            try:
-                if not valid_contextj(label, pos):
-                    raise InvalidCodepointContext('Joiner {0} not allowed at position {1} in {2}'.format(
-                        _unot(cp_value), pos+1, repr(label)))
-            except ValueError:
-                raise IDNAError('Unknown codepoint adjacent to joiner {0} at position {1} in {2}'.format(
-                    _unot(cp_value), pos+1, repr(label)))
-        elif intranges_contain(cp_value, idnadata.codepoint_classes['CONTEXTO']):
-            if not valid_contexto(label, pos):
-                raise InvalidCodepointContext('Codepoint {0} not allowed at position {1} in {2}'.format(_unot(cp_value), pos+1, repr(label)))
-        else:
-            raise InvalidCodepoint('Codepoint {0} at position {1} of {2} not allowed'.format(_unot(cp_value), pos+1, repr(label)))
-
-    check_bidi(label)
-
-
-def alabel(label):
-
-    try:
-        label = label.encode('ascii')
-        ulabel(label)
-        if not valid_label_length(label):
-            raise IDNAError('Label too long')
-        return label
-    except UnicodeEncodeError:
-        pass
-
-    if not label:
-        raise IDNAError('No Input')
-
-    label = unicode(label)
-    check_label(label)
-    label = _punycode(label)
-    label = _alabel_prefix + label
-
-    if not valid_label_length(label):
-        raise IDNAError('Label too long')
-
-    return label
-
-
-def ulabel(label):
-
-    if not isinstance(label, (bytes, bytearray)):
-        try:
-            label = label.encode('ascii')
-        except UnicodeEncodeError:
-            check_label(label)
-            return label
-
-    label = label.lower()
-    if label.startswith(_alabel_prefix):
-        label = label[len(_alabel_prefix):]
-    else:
-        check_label(label)
-        return label.decode('ascii')
-
-    label = label.decode('punycode')
-    check_label(label)
-    return label
-
-
-def uts46_remap(domain, std3_rules=True, transitional=False):
-    """Re-map the characters in the string according to UTS46 processing."""
-    from .uts46data import uts46data
-    output = u""
-    try:
-        for pos, char in enumerate(domain):
-            code_point = ord(char)
-            uts46row = uts46data[code_point if code_point < 256 else
-                bisect.bisect_left(uts46data, (code_point, "Z")) - 1]
-            status = uts46row[1]
-            replacement = uts46row[2] if len(uts46row) == 3 else None
-            if (status == "V" or
-                    (status == "D" and not transitional) or
-                    (status == "3" and not std3_rules and replacement is None)):
-                output += char
-            elif replacement is not None and (status == "M" or
-                    (status == "3" and not std3_rules) or
-                    (status == "D" and transitional)):
-                output += replacement
-            elif status != "I":
-                raise IndexError()
-        return unicodedata.normalize("NFC", output)
-    except IndexError:
-        raise InvalidCodepoint(
-            "Codepoint {0} not allowed at position {1} in {2}".format(
-            _unot(code_point), pos + 1, repr(domain)))
-
-
-def encode(s, strict=False, uts46=False, std3_rules=False, transitional=False):
-
-    if isinstance(s, (bytes, bytearray)):
-        s = s.decode("ascii")
-    if uts46:
-        s = uts46_remap(s, std3_rules, transitional)
-    trailing_dot = False
-    result = []
-    if strict:
-        labels = s.split('.')
-    else:
-        labels = _unicode_dots_re.split(s)
-    if not labels or labels == ['']:
-        raise IDNAError('Empty domain')
-    if labels[-1] == '':
-        del labels[-1]
-        trailing_dot = True
-    for label in labels:
-        s = alabel(label)
-        if s:
-            result.append(s)
-        else:
-            raise IDNAError('Empty label')
-    if trailing_dot:
-        result.append(b'')
-    s = b'.'.join(result)
-    if not valid_string_length(s, trailing_dot):
-        raise IDNAError('Domain too long')
-    return s
-
-
-def decode(s, strict=False, uts46=False, std3_rules=False):
-
-    if isinstance(s, (bytes, bytearray)):
-        s = s.decode("ascii")
-    if uts46:
-        s = uts46_remap(s, std3_rules, False)
-    trailing_dot = False
-    result = []
-    if not strict:
-        labels = _unicode_dots_re.split(s)
-    else:
-        labels = s.split(u'.')
-    if not labels or labels == ['']:
-        raise IDNAError('Empty domain')
-    if not labels[-1]:
-        del labels[-1]
-        trailing_dot = True
-    for label in labels:
-        s = ulabel(label)
-        if s:
-            result.append(s)
-        else:
-            raise IDNAError('Empty label')
-    if trailing_dot:
-        result.append(u'')
-    return u'.'.join(result)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/idna/idnadata.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/idna/idnadata.py
deleted file mode 100644
index a80c959..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/idna/idnadata.py
+++ /dev/null
@@ -1,1979 +0,0 @@
-# This file is automatically generated by tools/idna-data
-
-__version__ = "11.0.0"
-scripts = {
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-        0xab650000ab66,
-        0x101400001018f,
-        0x101a0000101a1,
-        0x1d2000001d246,
-    ),
-    'Han': (
-        0x2e8000002e9a,
-        0x2e9b00002ef4,
-        0x2f0000002fd6,
-        0x300500003006,
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-        0x2b8200002cea2,
-        0x2ceb00002ebe1,
-        0x2f8000002fa1e,
-    ),
-    'Hebrew': (
-        0x591000005c8,
-        0x5d0000005eb,
-        0x5ef000005f5,
-        0xfb1d0000fb37,
-        0xfb380000fb3d,
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-        0xfb400000fb42,
-        0xfb430000fb45,
-        0xfb460000fb50,
-    ),
-    'Hiragana': (
-        0x304100003097,
-        0x309d000030a0,
-        0x1b0010001b11f,
-        0x1f2000001f201,
-    ),
-    'Katakana': (
-        0x30a1000030fb,
-        0x30fd00003100,
-        0x31f000003200,
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-        0x330000003358,
-        0xff660000ff70,
-        0xff710000ff9e,
-        0x1b0000001b001,
-    ),
-}
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diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/idna/intranges.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/idna/intranges.py
deleted file mode 100644
index fa8a735..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/idna/intranges.py
+++ /dev/null
@@ -1,53 +0,0 @@
-"""
-Given a list of integers, made up of (hopefully) a small number of long runs
-of consecutive integers, compute a representation of the form
-((start1, end1), (start2, end2) ...). Then answer the question "was x present
-in the original list?" in time O(log(# runs)).
-"""
-
-import bisect
-
-def intranges_from_list(list_):
-    """Represent a list of integers as a sequence of ranges:
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-    integers are exactly those x such that start_i <= x < end_i for some i.
-
-    Ranges are encoded as single integers (start << 32 | end), not as tuples.
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-
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-    last_write = -1
-    for i in range(len(sorted_list)):
-        if i+1 < len(sorted_list):
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-
-    return tuple(ranges)
-
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-
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-    return (r >> 32), (r & ((1 << 32) - 1))
-
-
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-    # we could be immediately ahead of a tuple (start, end)
-    # with start < int_ <= end
-    if pos > 0:
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-        if left <= int_ < right:
-            return True
-    # or we could be immediately behind a tuple (int_, end)
-    if pos < len(ranges):
-        left, _ = _decode_range(ranges[pos])
-        if left == int_:
-            return True
-    return False
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/idna/package_data.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/idna/package_data.py
deleted file mode 100644
index 257e898..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/idna/package_data.py
+++ /dev/null
@@ -1,2 +0,0 @@
-__version__ = '2.8'
-
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/idna/uts46data.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/idna/uts46data.py
deleted file mode 100644
index a68ed4c..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/idna/uts46data.py
+++ /dev/null
@@ -1,8205 +0,0 @@
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diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/ipaddress.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/ipaddress.py
deleted file mode 100644
index f2d0766..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/ipaddress.py
+++ /dev/null
@@ -1,2419 +0,0 @@
-# Copyright 2007 Google Inc.
-#  Licensed to PSF under a Contributor Agreement.
-
-"""A fast, lightweight IPv4/IPv6 manipulation library in Python.
-
-This library is used to create/poke/manipulate IPv4 and IPv6 addresses
-and networks.
-
-"""
-
-from __future__ import unicode_literals
-
-
-import itertools
-import struct
-
-__version__ = '1.0.22'
-
-# Compatibility functions
-_compat_int_types = (int,)
-try:
-    _compat_int_types = (int, long)
-except NameError:
-    pass
-try:
-    _compat_str = unicode
-except NameError:
-    _compat_str = str
-    assert bytes != str
-if b'\0'[0] == 0:  # Python 3 semantics
-    def _compat_bytes_to_byte_vals(byt):
-        return byt
-else:
-    def _compat_bytes_to_byte_vals(byt):
-        return [struct.unpack(b'!B', b)[0] for b in byt]
-try:
-    _compat_int_from_byte_vals = int.from_bytes
-except AttributeError:
-    def _compat_int_from_byte_vals(bytvals, endianess):
-        assert endianess == 'big'
-        res = 0
-        for bv in bytvals:
-            assert isinstance(bv, _compat_int_types)
-            res = (res << 8) + bv
-        return res
-
-
-def _compat_to_bytes(intval, length, endianess):
-    assert isinstance(intval, _compat_int_types)
-    assert endianess == 'big'
-    if length == 4:
-        if intval < 0 or intval >= 2 ** 32:
-            raise struct.error("integer out of range for 'I' format code")
-        return struct.pack(b'!I', intval)
-    elif length == 16:
-        if intval < 0 or intval >= 2 ** 128:
-            raise struct.error("integer out of range for 'QQ' format code")
-        return struct.pack(b'!QQ', intval >> 64, intval & 0xffffffffffffffff)
-    else:
-        raise NotImplementedError()
-
-
-if hasattr(int, 'bit_length'):
-    # Not int.bit_length , since that won't work in 2.7 where long exists
-    def _compat_bit_length(i):
-        return i.bit_length()
-else:
-    def _compat_bit_length(i):
-        for res in itertools.count():
-            if i >> res == 0:
-                return res
-
-
-def _compat_range(start, end, step=1):
-    assert step > 0
-    i = start
-    while i < end:
-        yield i
-        i += step
-
-
-class _TotalOrderingMixin(object):
-    __slots__ = ()
-
-    # Helper that derives the other comparison operations from
-    # __lt__ and __eq__
-    # We avoid functools.total_ordering because it doesn't handle
-    # NotImplemented correctly yet (http://bugs.python.org/issue10042)
-    def __eq__(self, other):
-        raise NotImplementedError
-
-    def __ne__(self, other):
-        equal = self.__eq__(other)
-        if equal is NotImplemented:
-            return NotImplemented
-        return not equal
-
-    def __lt__(self, other):
-        raise NotImplementedError
-
-    def __le__(self, other):
-        less = self.__lt__(other)
-        if less is NotImplemented or not less:
-            return self.__eq__(other)
-        return less
-
-    def __gt__(self, other):
-        less = self.__lt__(other)
-        if less is NotImplemented:
-            return NotImplemented
-        equal = self.__eq__(other)
-        if equal is NotImplemented:
-            return NotImplemented
-        return not (less or equal)
-
-    def __ge__(self, other):
-        less = self.__lt__(other)
-        if less is NotImplemented:
-            return NotImplemented
-        return not less
-
-
-IPV4LENGTH = 32
-IPV6LENGTH = 128
-
-
-class AddressValueError(ValueError):
-    """A Value Error related to the address."""
-
-
-class NetmaskValueError(ValueError):
-    """A Value Error related to the netmask."""
-
-
-def ip_address(address):
-    """Take an IP string/int and return an object of the correct type.
-
-    Args:
-        address: A string or integer, the IP address.  Either IPv4 or
-          IPv6 addresses may be supplied; integers less than 2**32 will
-          be considered to be IPv4 by default.
-
-    Returns:
-        An IPv4Address or IPv6Address object.
-
-    Raises:
-        ValueError: if the *address* passed isn't either a v4 or a v6
-          address
-
-    """
-    try:
-        return IPv4Address(address)
-    except (AddressValueError, NetmaskValueError):
-        pass
-
-    try:
-        return IPv6Address(address)
-    except (AddressValueError, NetmaskValueError):
-        pass
-
-    if isinstance(address, bytes):
-        raise AddressValueError(
-            '%r does not appear to be an IPv4 or IPv6 address. '
-            'Did you pass in a bytes (str in Python 2) instead of'
-            ' a unicode object?' % address)
-
-    raise ValueError('%r does not appear to be an IPv4 or IPv6 address' %
-                     address)
-
-
-def ip_network(address, strict=True):
-    """Take an IP string/int and return an object of the correct type.
-
-    Args:
-        address: A string or integer, the IP network.  Either IPv4 or
-          IPv6 networks may be supplied; integers less than 2**32 will
-          be considered to be IPv4 by default.
-
-    Returns:
-        An IPv4Network or IPv6Network object.
-
-    Raises:
-        ValueError: if the string passed isn't either a v4 or a v6
-          address. Or if the network has host bits set.
-
-    """
-    try:
-        return IPv4Network(address, strict)
-    except (AddressValueError, NetmaskValueError):
-        pass
-
-    try:
-        return IPv6Network(address, strict)
-    except (AddressValueError, NetmaskValueError):
-        pass
-
-    if isinstance(address, bytes):
-        raise AddressValueError(
-            '%r does not appear to be an IPv4 or IPv6 network. '
-            'Did you pass in a bytes (str in Python 2) instead of'
-            ' a unicode object?' % address)
-
-    raise ValueError('%r does not appear to be an IPv4 or IPv6 network' %
-                     address)
-
-
-def ip_interface(address):
-    """Take an IP string/int and return an object of the correct type.
-
-    Args:
-        address: A string or integer, the IP address.  Either IPv4 or
-          IPv6 addresses may be supplied; integers less than 2**32 will
-          be considered to be IPv4 by default.
-
-    Returns:
-        An IPv4Interface or IPv6Interface object.
-
-    Raises:
-        ValueError: if the string passed isn't either a v4 or a v6
-          address.
-
-    Notes:
-        The IPv?Interface classes describe an Address on a particular
-        Network, so they're basically a combination of both the Address
-        and Network classes.
-
-    """
-    try:
-        return IPv4Interface(address)
-    except (AddressValueError, NetmaskValueError):
-        pass
-
-    try:
-        return IPv6Interface(address)
-    except (AddressValueError, NetmaskValueError):
-        pass
-
-    raise ValueError('%r does not appear to be an IPv4 or IPv6 interface' %
-                     address)
-
-
-def v4_int_to_packed(address):
-    """Represent an address as 4 packed bytes in network (big-endian) order.
-
-    Args:
-        address: An integer representation of an IPv4 IP address.
-
-    Returns:
-        The integer address packed as 4 bytes in network (big-endian) order.
-
-    Raises:
-        ValueError: If the integer is negative or too large to be an
-          IPv4 IP address.
-
-    """
-    try:
-        return _compat_to_bytes(address, 4, 'big')
-    except (struct.error, OverflowError):
-        raise ValueError("Address negative or too large for IPv4")
-
-
-def v6_int_to_packed(address):
-    """Represent an address as 16 packed bytes in network (big-endian) order.
-
-    Args:
-        address: An integer representation of an IPv6 IP address.
-
-    Returns:
-        The integer address packed as 16 bytes in network (big-endian) order.
-
-    """
-    try:
-        return _compat_to_bytes(address, 16, 'big')
-    except (struct.error, OverflowError):
-        raise ValueError("Address negative or too large for IPv6")
-
-
-def _split_optional_netmask(address):
-    """Helper to split the netmask and raise AddressValueError if needed"""
-    addr = _compat_str(address).split('/')
-    if len(addr) > 2:
-        raise AddressValueError("Only one '/' permitted in %r" % address)
-    return addr
-
-
-def _find_address_range(addresses):
-    """Find a sequence of sorted deduplicated IPv#Address.
-
-    Args:
-        addresses: a list of IPv#Address objects.
-
-    Yields:
-        A tuple containing the first and last IP addresses in the sequence.
-
-    """
-    it = iter(addresses)
-    first = last = next(it)
-    for ip in it:
-        if ip._ip != last._ip + 1:
-            yield first, last
-            first = ip
-        last = ip
-    yield first, last
-
-
-def _count_righthand_zero_bits(number, bits):
-    """Count the number of zero bits on the right hand side.
-
-    Args:
-        number: an integer.
-        bits: maximum number of bits to count.
-
-    Returns:
-        The number of zero bits on the right hand side of the number.
-
-    """
-    if number == 0:
-        return bits
-    return min(bits, _compat_bit_length(~number & (number - 1)))
-
-
-def summarize_address_range(first, last):
-    """Summarize a network range given the first and last IP addresses.
-
-    Example:
-        >>> list(summarize_address_range(IPv4Address('192.0.2.0'),
-        ...                              IPv4Address('192.0.2.130')))
-        ...                                #doctest: +NORMALIZE_WHITESPACE
-        [IPv4Network('192.0.2.0/25'), IPv4Network('192.0.2.128/31'),
-         IPv4Network('192.0.2.130/32')]
-
-    Args:
-        first: the first IPv4Address or IPv6Address in the range.
-        last: the last IPv4Address or IPv6Address in the range.
-
-    Returns:
-        An iterator of the summarized IPv(4|6) network objects.
-
-    Raise:
-        TypeError:
-            If the first and last objects are not IP addresses.
-            If the first and last objects are not the same version.
-        ValueError:
-            If the last object is not greater than the first.
-            If the version of the first address is not 4 or 6.
-
-    """
-    if (not (isinstance(first, _BaseAddress) and
-             isinstance(last, _BaseAddress))):
-        raise TypeError('first and last must be IP addresses, not networks')
-    if first.version != last.version:
-        raise TypeError("%s and %s are not of the same version" % (
-                        first, last))
-    if first > last:
-        raise ValueError('last IP address must be greater than first')
-
-    if first.version == 4:
-        ip = IPv4Network
-    elif first.version == 6:
-        ip = IPv6Network
-    else:
-        raise ValueError('unknown IP version')
-
-    ip_bits = first._max_prefixlen
-    first_int = first._ip
-    last_int = last._ip
-    while first_int <= last_int:
-        nbits = min(_count_righthand_zero_bits(first_int, ip_bits),
-                    _compat_bit_length(last_int - first_int + 1) - 1)
-        net = ip((first_int, ip_bits - nbits))
-        yield net
-        first_int += 1 << nbits
-        if first_int - 1 == ip._ALL_ONES:
-            break
-
-
-def _collapse_addresses_internal(addresses):
-    """Loops through the addresses, collapsing concurrent netblocks.
-
-    Example:
-
-        ip1 = IPv4Network('192.0.2.0/26')
-        ip2 = IPv4Network('192.0.2.64/26')
-        ip3 = IPv4Network('192.0.2.128/26')
-        ip4 = IPv4Network('192.0.2.192/26')
-
-        _collapse_addresses_internal([ip1, ip2, ip3, ip4]) ->
-          [IPv4Network('192.0.2.0/24')]
-
-        This shouldn't be called directly; it is called via
-          collapse_addresses([]).
-
-    Args:
-        addresses: A list of IPv4Network's or IPv6Network's
-
-    Returns:
-        A list of IPv4Network's or IPv6Network's depending on what we were
-        passed.
-
-    """
-    # First merge
-    to_merge = list(addresses)
-    subnets = {}
-    while to_merge:
-        net = to_merge.pop()
-        supernet = net.supernet()
-        existing = subnets.get(supernet)
-        if existing is None:
-            subnets[supernet] = net
-        elif existing != net:
-            # Merge consecutive subnets
-            del subnets[supernet]
-            to_merge.append(supernet)
-    # Then iterate over resulting networks, skipping subsumed subnets
-    last = None
-    for net in sorted(subnets.values()):
-        if last is not None:
-            # Since they are sorted,
-            # last.network_address <= net.network_address is a given.
-            if last.broadcast_address >= net.broadcast_address:
-                continue
-        yield net
-        last = net
-
-
-def collapse_addresses(addresses):
-    """Collapse a list of IP objects.
-
-    Example:
-        collapse_addresses([IPv4Network('192.0.2.0/25'),
-                            IPv4Network('192.0.2.128/25')]) ->
-                           [IPv4Network('192.0.2.0/24')]
-
-    Args:
-        addresses: An iterator of IPv4Network or IPv6Network objects.
-
-    Returns:
-        An iterator of the collapsed IPv(4|6)Network objects.
-
-    Raises:
-        TypeError: If passed a list of mixed version objects.
-
-    """
-    addrs = []
-    ips = []
-    nets = []
-
-    # split IP addresses and networks
-    for ip in addresses:
-        if isinstance(ip, _BaseAddress):
-            if ips and ips[-1]._version != ip._version:
-                raise TypeError("%s and %s are not of the same version" % (
-                                ip, ips[-1]))
-            ips.append(ip)
-        elif ip._prefixlen == ip._max_prefixlen:
-            if ips and ips[-1]._version != ip._version:
-                raise TypeError("%s and %s are not of the same version" % (
-                                ip, ips[-1]))
-            try:
-                ips.append(ip.ip)
-            except AttributeError:
-                ips.append(ip.network_address)
-        else:
-            if nets and nets[-1]._version != ip._version:
-                raise TypeError("%s and %s are not of the same version" % (
-                                ip, nets[-1]))
-            nets.append(ip)
-
-    # sort and dedup
-    ips = sorted(set(ips))
-
-    # find consecutive address ranges in the sorted sequence and summarize them
-    if ips:
-        for first, last in _find_address_range(ips):
-            addrs.extend(summarize_address_range(first, last))
-
-    return _collapse_addresses_internal(addrs + nets)
-
-
-def get_mixed_type_key(obj):
-    """Return a key suitable for sorting between networks and addresses.
-
-    Address and Network objects are not sortable by default; they're
-    fundamentally different so the expression
-
-        IPv4Address('192.0.2.0') <= IPv4Network('192.0.2.0/24')
-
-    doesn't make any sense.  There are some times however, where you may wish
-    to have ipaddress sort these for you anyway. If you need to do this, you
-    can use this function as the key= argument to sorted().
-
-    Args:
-      obj: either a Network or Address object.
-    Returns:
-      appropriate key.
-
-    """
-    if isinstance(obj, _BaseNetwork):
-        return obj._get_networks_key()
-    elif isinstance(obj, _BaseAddress):
-        return obj._get_address_key()
-    return NotImplemented
-
-
-class _IPAddressBase(_TotalOrderingMixin):
-
-    """The mother class."""
-
-    __slots__ = ()
-
-    @property
-    def exploded(self):
-        """Return the longhand version of the IP address as a string."""
-        return self._explode_shorthand_ip_string()
-
-    @property
-    def compressed(self):
-        """Return the shorthand version of the IP address as a string."""
-        return _compat_str(self)
-
-    @property
-    def reverse_pointer(self):
-        """The name of the reverse DNS pointer for the IP address, e.g.:
-            >>> ipaddress.ip_address("127.0.0.1").reverse_pointer
-            '1.0.0.127.in-addr.arpa'
-            >>> ipaddress.ip_address("2001:db8::1").reverse_pointer
-            '1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.b.d.0.1.0.0.2.ip6.arpa'
-
-        """
-        return self._reverse_pointer()
-
-    @property
-    def version(self):
-        msg = '%200s has no version specified' % (type(self),)
-        raise NotImplementedError(msg)
-
-    def _check_int_address(self, address):
-        if address < 0:
-            msg = "%d (< 0) is not permitted as an IPv%d address"
-            raise AddressValueError(msg % (address, self._version))
-        if address > self._ALL_ONES:
-            msg = "%d (>= 2**%d) is not permitted as an IPv%d address"
-            raise AddressValueError(msg % (address, self._max_prefixlen,
-                                           self._version))
-
-    def _check_packed_address(self, address, expected_len):
-        address_len = len(address)
-        if address_len != expected_len:
-            msg = (
-                '%r (len %d != %d) is not permitted as an IPv%d address. '
-                'Did you pass in a bytes (str in Python 2) instead of'
-                ' a unicode object?')
-            raise AddressValueError(msg % (address, address_len,
-                                           expected_len, self._version))
-
-    @classmethod
-    def _ip_int_from_prefix(cls, prefixlen):
-        """Turn the prefix length into a bitwise netmask
-
-        Args:
-            prefixlen: An integer, the prefix length.
-
-        Returns:
-            An integer.
-
-        """
-        return cls._ALL_ONES ^ (cls._ALL_ONES >> prefixlen)
-
-    @classmethod
-    def _prefix_from_ip_int(cls, ip_int):
-        """Return prefix length from the bitwise netmask.
-
-        Args:
-            ip_int: An integer, the netmask in expanded bitwise format
-
-        Returns:
-            An integer, the prefix length.
-
-        Raises:
-            ValueError: If the input intermingles zeroes & ones
-        """
-        trailing_zeroes = _count_righthand_zero_bits(ip_int,
-                                                     cls._max_prefixlen)
-        prefixlen = cls._max_prefixlen - trailing_zeroes
-        leading_ones = ip_int >> trailing_zeroes
-        all_ones = (1 << prefixlen) - 1
-        if leading_ones != all_ones:
-            byteslen = cls._max_prefixlen // 8
-            details = _compat_to_bytes(ip_int, byteslen, 'big')
-            msg = 'Netmask pattern %r mixes zeroes & ones'
-            raise ValueError(msg % details)
-        return prefixlen
-
-    @classmethod
-    def _report_invalid_netmask(cls, netmask_str):
-        msg = '%r is not a valid netmask' % netmask_str
-        raise NetmaskValueError(msg)
-
-    @classmethod
-    def _prefix_from_prefix_string(cls, prefixlen_str):
-        """Return prefix length from a numeric string
-
-        Args:
-            prefixlen_str: The string to be converted
-
-        Returns:
-            An integer, the prefix length.
-
-        Raises:
-            NetmaskValueError: If the input is not a valid netmask
-        """
-        # int allows a leading +/- as well as surrounding whitespace,
-        # so we ensure that isn't the case
-        if not _BaseV4._DECIMAL_DIGITS.issuperset(prefixlen_str):
-            cls._report_invalid_netmask(prefixlen_str)
-        try:
-            prefixlen = int(prefixlen_str)
-        except ValueError:
-            cls._report_invalid_netmask(prefixlen_str)
-        if not (0 <= prefixlen <= cls._max_prefixlen):
-            cls._report_invalid_netmask(prefixlen_str)
-        return prefixlen
-
-    @classmethod
-    def _prefix_from_ip_string(cls, ip_str):
-        """Turn a netmask/hostmask string into a prefix length
-
-        Args:
-            ip_str: The netmask/hostmask to be converted
-
-        Returns:
-            An integer, the prefix length.
-
-        Raises:
-            NetmaskValueError: If the input is not a valid netmask/hostmask
-        """
-        # Parse the netmask/hostmask like an IP address.
-        try:
-            ip_int = cls._ip_int_from_string(ip_str)
-        except AddressValueError:
-            cls._report_invalid_netmask(ip_str)
-
-        # Try matching a netmask (this would be /1*0*/ as a bitwise regexp).
-        # Note that the two ambiguous cases (all-ones and all-zeroes) are
-        # treated as netmasks.
-        try:
-            return cls._prefix_from_ip_int(ip_int)
-        except ValueError:
-            pass
-
-        # Invert the bits, and try matching a /0+1+/ hostmask instead.
-        ip_int ^= cls._ALL_ONES
-        try:
-            return cls._prefix_from_ip_int(ip_int)
-        except ValueError:
-            cls._report_invalid_netmask(ip_str)
-
-    def __reduce__(self):
-        return self.__class__, (_compat_str(self),)
-
-
-class _BaseAddress(_IPAddressBase):
-
-    """A generic IP object.
-
-    This IP class contains the version independent methods which are
-    used by single IP addresses.
-    """
-
-    __slots__ = ()
-
-    def __int__(self):
-        return self._ip
-
-    def __eq__(self, other):
-        try:
-            return (self._ip == other._ip and
-                    self._version == other._version)
-        except AttributeError:
-            return NotImplemented
-
-    def __lt__(self, other):
-        if not isinstance(other, _IPAddressBase):
-            return NotImplemented
-        if not isinstance(other, _BaseAddress):
-            raise TypeError('%s and %s are not of the same type' % (
-                self, other))
-        if self._version != other._version:
-            raise TypeError('%s and %s are not of the same version' % (
-                self, other))
-        if self._ip != other._ip:
-            return self._ip < other._ip
-        return False
-
-    # Shorthand for Integer addition and subtraction. This is not
-    # meant to ever support addition/subtraction of addresses.
-    def __add__(self, other):
-        if not isinstance(other, _compat_int_types):
-            return NotImplemented
-        return self.__class__(int(self) + other)
-
-    def __sub__(self, other):
-        if not isinstance(other, _compat_int_types):
-            return NotImplemented
-        return self.__class__(int(self) - other)
-
-    def __repr__(self):
-        return '%s(%r)' % (self.__class__.__name__, _compat_str(self))
-
-    def __str__(self):
-        return _compat_str(self._string_from_ip_int(self._ip))
-
-    def __hash__(self):
-        return hash(hex(int(self._ip)))
-
-    def _get_address_key(self):
-        return (self._version, self)
-
-    def __reduce__(self):
-        return self.__class__, (self._ip,)
-
-
-class _BaseNetwork(_IPAddressBase):
-
-    """A generic IP network object.
-
-    This IP class contains the version independent methods which are
-    used by networks.
-
-    """
-    def __init__(self, address):
-        self._cache = {}
-
-    def __repr__(self):
-        return '%s(%r)' % (self.__class__.__name__, _compat_str(self))
-
-    def __str__(self):
-        return '%s/%d' % (self.network_address, self.prefixlen)
-
-    def hosts(self):
-        """Generate Iterator over usable hosts in a network.
-
-        This is like __iter__ except it doesn't return the network
-        or broadcast addresses.
-
-        """
-        network = int(self.network_address)
-        broadcast = int(self.broadcast_address)
-        for x in _compat_range(network + 1, broadcast):
-            yield self._address_class(x)
-
-    def __iter__(self):
-        network = int(self.network_address)
-        broadcast = int(self.broadcast_address)
-        for x in _compat_range(network, broadcast + 1):
-            yield self._address_class(x)
-
-    def __getitem__(self, n):
-        network = int(self.network_address)
-        broadcast = int(self.broadcast_address)
-        if n >= 0:
-            if network + n > broadcast:
-                raise IndexError('address out of range')
-            return self._address_class(network + n)
-        else:
-            n += 1
-            if broadcast + n < network:
-                raise IndexError('address out of range')
-            return self._address_class(broadcast + n)
-
-    def __lt__(self, other):
-        if not isinstance(other, _IPAddressBase):
-            return NotImplemented
-        if not isinstance(other, _BaseNetwork):
-            raise TypeError('%s and %s are not of the same type' % (
-                            self, other))
-        if self._version != other._version:
-            raise TypeError('%s and %s are not of the same version' % (
-                            self, other))
-        if self.network_address != other.network_address:
-            return self.network_address < other.network_address
-        if self.netmask != other.netmask:
-            return self.netmask < other.netmask
-        return False
-
-    def __eq__(self, other):
-        try:
-            return (self._version == other._version and
-                    self.network_address == other.network_address and
-                    int(self.netmask) == int(other.netmask))
-        except AttributeError:
-            return NotImplemented
-
-    def __hash__(self):
-        return hash(int(self.network_address) ^ int(self.netmask))
-
-    def __contains__(self, other):
-        # always false if one is v4 and the other is v6.
-        if self._version != other._version:
-            return False
-        # dealing with another network.
-        if isinstance(other, _BaseNetwork):
-            return False
-        # dealing with another address
-        else:
-            # address
-            return (int(self.network_address) <= int(other._ip) <=
-                    int(self.broadcast_address))
-
-    def overlaps(self, other):
-        """Tell if self is partly contained in other."""
-        return self.network_address in other or (
-            self.broadcast_address in other or (
-                other.network_address in self or (
-                    other.broadcast_address in self)))
-
-    @property
-    def broadcast_address(self):
-        x = self._cache.get('broadcast_address')
-        if x is None:
-            x = self._address_class(int(self.network_address) |
-                                    int(self.hostmask))
-            self._cache['broadcast_address'] = x
-        return x
-
-    @property
-    def hostmask(self):
-        x = self._cache.get('hostmask')
-        if x is None:
-            x = self._address_class(int(self.netmask) ^ self._ALL_ONES)
-            self._cache['hostmask'] = x
-        return x
-
-    @property
-    def with_prefixlen(self):
-        return '%s/%d' % (self.network_address, self._prefixlen)
-
-    @property
-    def with_netmask(self):
-        return '%s/%s' % (self.network_address, self.netmask)
-
-    @property
-    def with_hostmask(self):
-        return '%s/%s' % (self.network_address, self.hostmask)
-
-    @property
-    def num_addresses(self):
-        """Number of hosts in the current subnet."""
-        return int(self.broadcast_address) - int(self.network_address) + 1
-
-    @property
-    def _address_class(self):
-        # Returning bare address objects (rather than interfaces) allows for
-        # more consistent behaviour across the network address, broadcast
-        # address and individual host addresses.
-        msg = '%200s has no associated address class' % (type(self),)
-        raise NotImplementedError(msg)
-
-    @property
-    def prefixlen(self):
-        return self._prefixlen
-
-    def address_exclude(self, other):
-        """Remove an address from a larger block.
-
-        For example:
-
-            addr1 = ip_network('192.0.2.0/28')
-            addr2 = ip_network('192.0.2.1/32')
-            list(addr1.address_exclude(addr2)) =
-                [IPv4Network('192.0.2.0/32'), IPv4Network('192.0.2.2/31'),
-                 IPv4Network('192.0.2.4/30'), IPv4Network('192.0.2.8/29')]
-
-        or IPv6:
-
-            addr1 = ip_network('2001:db8::1/32')
-            addr2 = ip_network('2001:db8::1/128')
-            list(addr1.address_exclude(addr2)) =
-                [ip_network('2001:db8::1/128'),
-                 ip_network('2001:db8::2/127'),
-                 ip_network('2001:db8::4/126'),
-                 ip_network('2001:db8::8/125'),
-                 ...
-                 ip_network('2001:db8:8000::/33')]
-
-        Args:
-            other: An IPv4Network or IPv6Network object of the same type.
-
-        Returns:
-            An iterator of the IPv(4|6)Network objects which is self
-            minus other.
-
-        Raises:
-            TypeError: If self and other are of differing address
-              versions, or if other is not a network object.
-            ValueError: If other is not completely contained by self.
-
-        """
-        if not self._version == other._version:
-            raise TypeError("%s and %s are not of the same version" % (
-                            self, other))
-
-        if not isinstance(other, _BaseNetwork):
-            raise TypeError("%s is not a network object" % other)
-
-        if not other.subnet_of(self):
-            raise ValueError('%s not contained in %s' % (other, self))
-        if other == self:
-            return
-
-        # Make sure we're comparing the network of other.
-        other = other.__class__('%s/%s' % (other.network_address,
-                                           other.prefixlen))
-
-        s1, s2 = self.subnets()
-        while s1 != other and s2 != other:
-            if other.subnet_of(s1):
-                yield s2
-                s1, s2 = s1.subnets()
-            elif other.subnet_of(s2):
-                yield s1
-                s1, s2 = s2.subnets()
-            else:
-                # If we got here, there's a bug somewhere.
-                raise AssertionError('Error performing exclusion: '
-                                     's1: %s s2: %s other: %s' %
-                                     (s1, s2, other))
-        if s1 == other:
-            yield s2
-        elif s2 == other:
-            yield s1
-        else:
-            # If we got here, there's a bug somewhere.
-            raise AssertionError('Error performing exclusion: '
-                                 's1: %s s2: %s other: %s' %
-                                 (s1, s2, other))
-
-    def compare_networks(self, other):
-        """Compare two IP objects.
-
-        This is only concerned about the comparison of the integer
-        representation of the network addresses.  This means that the
-        host bits aren't considered at all in this method.  If you want
-        to compare host bits, you can easily enough do a
-        'HostA._ip < HostB._ip'
-
-        Args:
-            other: An IP object.
-
-        Returns:
-            If the IP versions of self and other are the same, returns:
-
-            -1 if self < other:
-              eg: IPv4Network('192.0.2.0/25') < IPv4Network('192.0.2.128/25')
-              IPv6Network('2001:db8::1000/124') <
-                  IPv6Network('2001:db8::2000/124')
-            0 if self == other
-              eg: IPv4Network('192.0.2.0/24') == IPv4Network('192.0.2.0/24')
-              IPv6Network('2001:db8::1000/124') ==
-                  IPv6Network('2001:db8::1000/124')
-            1 if self > other
-              eg: IPv4Network('192.0.2.128/25') > IPv4Network('192.0.2.0/25')
-                  IPv6Network('2001:db8::2000/124') >
-                      IPv6Network('2001:db8::1000/124')
-
-          Raises:
-              TypeError if the IP versions are different.
-
-        """
-        # does this need to raise a ValueError?
-        if self._version != other._version:
-            raise TypeError('%s and %s are not of the same type' % (
-                            self, other))
-        # self._version == other._version below here:
-        if self.network_address < other.network_address:
-            return -1
-        if self.network_address > other.network_address:
-            return 1
-        # self.network_address == other.network_address below here:
-        if self.netmask < other.netmask:
-            return -1
-        if self.netmask > other.netmask:
-            return 1
-        return 0
-
-    def _get_networks_key(self):
-        """Network-only key function.
-
-        Returns an object that identifies this address' network and
-        netmask. This function is a suitable "key" argument for sorted()
-        and list.sort().
-
-        """
-        return (self._version, self.network_address, self.netmask)
-
-    def subnets(self, prefixlen_diff=1, new_prefix=None):
-        """The subnets which join to make the current subnet.
-
-        In the case that self contains only one IP
-        (self._prefixlen == 32 for IPv4 or self._prefixlen == 128
-        for IPv6), yield an iterator with just ourself.
-
-        Args:
-            prefixlen_diff: An integer, the amount the prefix length
-              should be increased by. This should not be set if
-              new_prefix is also set.
-            new_prefix: The desired new prefix length. This must be a
-              larger number (smaller prefix) than the existing prefix.
-              This should not be set if prefixlen_diff is also set.
-
-        Returns:
-            An iterator of IPv(4|6) objects.
-
-        Raises:
-            ValueError: The prefixlen_diff is too small or too large.
-                OR
-            prefixlen_diff and new_prefix are both set or new_prefix
-              is a smaller number than the current prefix (smaller
-              number means a larger network)
-
-        """
-        if self._prefixlen == self._max_prefixlen:
-            yield self
-            return
-
-        if new_prefix is not None:
-            if new_prefix < self._prefixlen:
-                raise ValueError('new prefix must be longer')
-            if prefixlen_diff != 1:
-                raise ValueError('cannot set prefixlen_diff and new_prefix')
-            prefixlen_diff = new_prefix - self._prefixlen
-
-        if prefixlen_diff < 0:
-            raise ValueError('prefix length diff must be > 0')
-        new_prefixlen = self._prefixlen + prefixlen_diff
-
-        if new_prefixlen > self._max_prefixlen:
-            raise ValueError(
-                'prefix length diff %d is invalid for netblock %s' % (
-                    new_prefixlen, self))
-
-        start = int(self.network_address)
-        end = int(self.broadcast_address) + 1
-        step = (int(self.hostmask) + 1) >> prefixlen_diff
-        for new_addr in _compat_range(start, end, step):
-            current = self.__class__((new_addr, new_prefixlen))
-            yield current
-
-    def supernet(self, prefixlen_diff=1, new_prefix=None):
-        """The supernet containing the current network.
-
-        Args:
-            prefixlen_diff: An integer, the amount the prefix length of
-              the network should be decreased by.  For example, given a
-              /24 network and a prefixlen_diff of 3, a supernet with a
-              /21 netmask is returned.
-
-        Returns:
-            An IPv4 network object.
-
-        Raises:
-            ValueError: If self.prefixlen - prefixlen_diff < 0. I.e., you have
-              a negative prefix length.
-                OR
-            If prefixlen_diff and new_prefix are both set or new_prefix is a
-              larger number than the current prefix (larger number means a
-              smaller network)
-
-        """
-        if self._prefixlen == 0:
-            return self
-
-        if new_prefix is not None:
-            if new_prefix > self._prefixlen:
-                raise ValueError('new prefix must be shorter')
-            if prefixlen_diff != 1:
-                raise ValueError('cannot set prefixlen_diff and new_prefix')
-            prefixlen_diff = self._prefixlen - new_prefix
-
-        new_prefixlen = self.prefixlen - prefixlen_diff
-        if new_prefixlen < 0:
-            raise ValueError(
-                'current prefixlen is %d, cannot have a prefixlen_diff of %d' %
-                (self.prefixlen, prefixlen_diff))
-        return self.__class__((
-            int(self.network_address) & (int(self.netmask) << prefixlen_diff),
-            new_prefixlen))
-
-    @property
-    def is_multicast(self):
-        """Test if the address is reserved for multicast use.
-
-        Returns:
-            A boolean, True if the address is a multicast address.
-            See RFC 2373 2.7 for details.
-
-        """
-        return (self.network_address.is_multicast and
-                self.broadcast_address.is_multicast)
-
-    @staticmethod
-    def _is_subnet_of(a, b):
-        try:
-            # Always false if one is v4 and the other is v6.
-            if a._version != b._version:
-                raise TypeError("%s and %s are not of the same version" (a, b))
-            return (b.network_address <= a.network_address and
-                    b.broadcast_address >= a.broadcast_address)
-        except AttributeError:
-            raise TypeError("Unable to test subnet containment "
-                            "between %s and %s" % (a, b))
-
-    def subnet_of(self, other):
-        """Return True if this network is a subnet of other."""
-        return self._is_subnet_of(self, other)
-
-    def supernet_of(self, other):
-        """Return True if this network is a supernet of other."""
-        return self._is_subnet_of(other, self)
-
-    @property
-    def is_reserved(self):
-        """Test if the address is otherwise IETF reserved.
-
-        Returns:
-            A boolean, True if the address is within one of the
-            reserved IPv6 Network ranges.
-
-        """
-        return (self.network_address.is_reserved and
-                self.broadcast_address.is_reserved)
-
-    @property
-    def is_link_local(self):
-        """Test if the address is reserved for link-local.
-
-        Returns:
-            A boolean, True if the address is reserved per RFC 4291.
-
-        """
-        return (self.network_address.is_link_local and
-                self.broadcast_address.is_link_local)
-
-    @property
-    def is_private(self):
-        """Test if this address is allocated for private networks.
-
-        Returns:
-            A boolean, True if the address is reserved per
-            iana-ipv4-special-registry or iana-ipv6-special-registry.
-
-        """
-        return (self.network_address.is_private and
-                self.broadcast_address.is_private)
-
-    @property
-    def is_global(self):
-        """Test if this address is allocated for public networks.
-
-        Returns:
-            A boolean, True if the address is not reserved per
-            iana-ipv4-special-registry or iana-ipv6-special-registry.
-
-        """
-        return not self.is_private
-
-    @property
-    def is_unspecified(self):
-        """Test if the address is unspecified.
-
-        Returns:
-            A boolean, True if this is the unspecified address as defined in
-            RFC 2373 2.5.2.
-
-        """
-        return (self.network_address.is_unspecified and
-                self.broadcast_address.is_unspecified)
-
-    @property
-    def is_loopback(self):
-        """Test if the address is a loopback address.
-
-        Returns:
-            A boolean, True if the address is a loopback address as defined in
-            RFC 2373 2.5.3.
-
-        """
-        return (self.network_address.is_loopback and
-                self.broadcast_address.is_loopback)
-
-
-class _BaseV4(object):
-
-    """Base IPv4 object.
-
-    The following methods are used by IPv4 objects in both single IP
-    addresses and networks.
-
-    """
-
-    __slots__ = ()
-    _version = 4
-    # Equivalent to 255.255.255.255 or 32 bits of 1's.
-    _ALL_ONES = (2 ** IPV4LENGTH) - 1
-    _DECIMAL_DIGITS = frozenset('0123456789')
-
-    # the valid octets for host and netmasks. only useful for IPv4.
-    _valid_mask_octets = frozenset([255, 254, 252, 248, 240, 224, 192, 128, 0])
-
-    _max_prefixlen = IPV4LENGTH
-    # There are only a handful of valid v4 netmasks, so we cache them all
-    # when constructed (see _make_netmask()).
-    _netmask_cache = {}
-
-    def _explode_shorthand_ip_string(self):
-        return _compat_str(self)
-
-    @classmethod
-    def _make_netmask(cls, arg):
-        """Make a (netmask, prefix_len) tuple from the given argument.
-
-        Argument can be:
-        - an integer (the prefix length)
-        - a string representing the prefix length (e.g. "24")
-        - a string representing the prefix netmask (e.g. "255.255.255.0")
-        """
-        if arg not in cls._netmask_cache:
-            if isinstance(arg, _compat_int_types):
-                prefixlen = arg
-            else:
-                try:
-                    # Check for a netmask in prefix length form
-                    prefixlen = cls._prefix_from_prefix_string(arg)
-                except NetmaskValueError:
-                    # Check for a netmask or hostmask in dotted-quad form.
-                    # This may raise NetmaskValueError.
-                    prefixlen = cls._prefix_from_ip_string(arg)
-            netmask = IPv4Address(cls._ip_int_from_prefix(prefixlen))
-            cls._netmask_cache[arg] = netmask, prefixlen
-        return cls._netmask_cache[arg]
-
-    @classmethod
-    def _ip_int_from_string(cls, ip_str):
-        """Turn the given IP string into an integer for comparison.
-
-        Args:
-            ip_str: A string, the IP ip_str.
-
-        Returns:
-            The IP ip_str as an integer.
-
-        Raises:
-            AddressValueError: if ip_str isn't a valid IPv4 Address.
-
-        """
-        if not ip_str:
-            raise AddressValueError('Address cannot be empty')
-
-        octets = ip_str.split('.')
-        if len(octets) != 4:
-            raise AddressValueError("Expected 4 octets in %r" % ip_str)
-
-        try:
-            return _compat_int_from_byte_vals(
-                map(cls._parse_octet, octets), 'big')
-        except ValueError as exc:
-            raise AddressValueError("%s in %r" % (exc, ip_str))
-
-    @classmethod
-    def _parse_octet(cls, octet_str):
-        """Convert a decimal octet into an integer.
-
-        Args:
-            octet_str: A string, the number to parse.
-
-        Returns:
-            The octet as an integer.
-
-        Raises:
-            ValueError: if the octet isn't strictly a decimal from [0..255].
-
-        """
-        if not octet_str:
-            raise ValueError("Empty octet not permitted")
-        # Whitelist the characters, since int() allows a lot of bizarre stuff.
-        if not cls._DECIMAL_DIGITS.issuperset(octet_str):
-            msg = "Only decimal digits permitted in %r"
-            raise ValueError(msg % octet_str)
-        # We do the length check second, since the invalid character error
-        # is likely to be more informative for the user
-        if len(octet_str) > 3:
-            msg = "At most 3 characters permitted in %r"
-            raise ValueError(msg % octet_str)
-        # Convert to integer (we know digits are legal)
-        octet_int = int(octet_str, 10)
-        # Any octets that look like they *might* be written in octal,
-        # and which don't look exactly the same in both octal and
-        # decimal are rejected as ambiguous
-        if octet_int > 7 and octet_str[0] == '0':
-            msg = "Ambiguous (octal/decimal) value in %r not permitted"
-            raise ValueError(msg % octet_str)
-        if octet_int > 255:
-            raise ValueError("Octet %d (> 255) not permitted" % octet_int)
-        return octet_int
-
-    @classmethod
-    def _string_from_ip_int(cls, ip_int):
-        """Turns a 32-bit integer into dotted decimal notation.
-
-        Args:
-            ip_int: An integer, the IP address.
-
-        Returns:
-            The IP address as a string in dotted decimal notation.
-
-        """
-        return '.'.join(_compat_str(struct.unpack(b'!B', b)[0]
-                                    if isinstance(b, bytes)
-                                    else b)
-                        for b in _compat_to_bytes(ip_int, 4, 'big'))
-
-    def _is_hostmask(self, ip_str):
-        """Test if the IP string is a hostmask (rather than a netmask).
-
-        Args:
-            ip_str: A string, the potential hostmask.
-
-        Returns:
-            A boolean, True if the IP string is a hostmask.
-
-        """
-        bits = ip_str.split('.')
-        try:
-            parts = [x for x in map(int, bits) if x in self._valid_mask_octets]
-        except ValueError:
-            return False
-        if len(parts) != len(bits):
-            return False
-        if parts[0] < parts[-1]:
-            return True
-        return False
-
-    def _reverse_pointer(self):
-        """Return the reverse DNS pointer name for the IPv4 address.
-
-        This implements the method described in RFC1035 3.5.
-
-        """
-        reverse_octets = _compat_str(self).split('.')[::-1]
-        return '.'.join(reverse_octets) + '.in-addr.arpa'
-
-    @property
-    def max_prefixlen(self):
-        return self._max_prefixlen
-
-    @property
-    def version(self):
-        return self._version
-
-
-class IPv4Address(_BaseV4, _BaseAddress):
-
-    """Represent and manipulate single IPv4 Addresses."""
-
-    __slots__ = ('_ip', '__weakref__')
-
-    def __init__(self, address):
-
-        """
-        Args:
-            address: A string or integer representing the IP
-
-              Additionally, an integer can be passed, so
-              IPv4Address('192.0.2.1') == IPv4Address(3221225985).
-              or, more generally
-              IPv4Address(int(IPv4Address('192.0.2.1'))) ==
-                IPv4Address('192.0.2.1')
-
-        Raises:
-            AddressValueError: If ipaddress isn't a valid IPv4 address.
-
-        """
-        # Efficient constructor from integer.
-        if isinstance(address, _compat_int_types):
-            self._check_int_address(address)
-            self._ip = address
-            return
-
-        # Constructing from a packed address
-        if isinstance(address, bytes):
-            self._check_packed_address(address, 4)
-            bvs = _compat_bytes_to_byte_vals(address)
-            self._ip = _compat_int_from_byte_vals(bvs, 'big')
-            return
-
-        # Assume input argument to be string or any object representation
-        # which converts into a formatted IP string.
-        addr_str = _compat_str(address)
-        if '/' in addr_str:
-            raise AddressValueError("Unexpected '/' in %r" % address)
-        self._ip = self._ip_int_from_string(addr_str)
-
-    @property
-    def packed(self):
-        """The binary representation of this address."""
-        return v4_int_to_packed(self._ip)
-
-    @property
-    def is_reserved(self):
-        """Test if the address is otherwise IETF reserved.
-
-         Returns:
-             A boolean, True if the address is within the
-             reserved IPv4 Network range.
-
-        """
-        return self in self._constants._reserved_network
-
-    @property
-    def is_private(self):
-        """Test if this address is allocated for private networks.
-
-        Returns:
-            A boolean, True if the address is reserved per
-            iana-ipv4-special-registry.
-
-        """
-        return any(self in net for net in self._constants._private_networks)
-
-    @property
-    def is_global(self):
-        return (
-            self not in self._constants._public_network and
-            not self.is_private)
-
-    @property
-    def is_multicast(self):
-        """Test if the address is reserved for multicast use.
-
-        Returns:
-            A boolean, True if the address is multicast.
-            See RFC 3171 for details.
-
-        """
-        return self in self._constants._multicast_network
-
-    @property
-    def is_unspecified(self):
-        """Test if the address is unspecified.
-
-        Returns:
-            A boolean, True if this is the unspecified address as defined in
-            RFC 5735 3.
-
-        """
-        return self == self._constants._unspecified_address
-
-    @property
-    def is_loopback(self):
-        """Test if the address is a loopback address.
-
-        Returns:
-            A boolean, True if the address is a loopback per RFC 3330.
-
-        """
-        return self in self._constants._loopback_network
-
-    @property
-    def is_link_local(self):
-        """Test if the address is reserved for link-local.
-
-        Returns:
-            A boolean, True if the address is link-local per RFC 3927.
-
-        """
-        return self in self._constants._linklocal_network
-
-
-class IPv4Interface(IPv4Address):
-
-    def __init__(self, address):
-        if isinstance(address, (bytes, _compat_int_types)):
-            IPv4Address.__init__(self, address)
-            self.network = IPv4Network(self._ip)
-            self._prefixlen = self._max_prefixlen
-            return
-
-        if isinstance(address, tuple):
-            IPv4Address.__init__(self, address[0])
-            if len(address) > 1:
-                self._prefixlen = int(address[1])
-            else:
-                self._prefixlen = self._max_prefixlen
-
-            self.network = IPv4Network(address, strict=False)
-            self.netmask = self.network.netmask
-            self.hostmask = self.network.hostmask
-            return
-
-        addr = _split_optional_netmask(address)
-        IPv4Address.__init__(self, addr[0])
-
-        self.network = IPv4Network(address, strict=False)
-        self._prefixlen = self.network._prefixlen
-
-        self.netmask = self.network.netmask
-        self.hostmask = self.network.hostmask
-
-    def __str__(self):
-        return '%s/%d' % (self._string_from_ip_int(self._ip),
-                          self.network.prefixlen)
-
-    def __eq__(self, other):
-        address_equal = IPv4Address.__eq__(self, other)
-        if not address_equal or address_equal is NotImplemented:
-            return address_equal
-        try:
-            return self.network == other.network
-        except AttributeError:
-            # An interface with an associated network is NOT the
-            # same as an unassociated address. That's why the hash
-            # takes the extra info into account.
-            return False
-
-    def __lt__(self, other):
-        address_less = IPv4Address.__lt__(self, other)
-        if address_less is NotImplemented:
-            return NotImplemented
-        try:
-            return (self.network < other.network or
-                    self.network == other.network and address_less)
-        except AttributeError:
-            # We *do* allow addresses and interfaces to be sorted. The
-            # unassociated address is considered less than all interfaces.
-            return False
-
-    def __hash__(self):
-        return self._ip ^ self._prefixlen ^ int(self.network.network_address)
-
-    __reduce__ = _IPAddressBase.__reduce__
-
-    @property
-    def ip(self):
-        return IPv4Address(self._ip)
-
-    @property
-    def with_prefixlen(self):
-        return '%s/%s' % (self._string_from_ip_int(self._ip),
-                          self._prefixlen)
-
-    @property
-    def with_netmask(self):
-        return '%s/%s' % (self._string_from_ip_int(self._ip),
-                          self.netmask)
-
-    @property
-    def with_hostmask(self):
-        return '%s/%s' % (self._string_from_ip_int(self._ip),
-                          self.hostmask)
-
-
-class IPv4Network(_BaseV4, _BaseNetwork):
-
-    """This class represents and manipulates 32-bit IPv4 network + addresses..
-
-    Attributes: [examples for IPv4Network('192.0.2.0/27')]
-        .network_address: IPv4Address('192.0.2.0')
-        .hostmask: IPv4Address('0.0.0.31')
-        .broadcast_address: IPv4Address('192.0.2.32')
-        .netmask: IPv4Address('255.255.255.224')
-        .prefixlen: 27
-
-    """
-    # Class to use when creating address objects
-    _address_class = IPv4Address
-
-    def __init__(self, address, strict=True):
-
-        """Instantiate a new IPv4 network object.
-
-        Args:
-            address: A string or integer representing the IP [& network].
-              '192.0.2.0/24'
-              '192.0.2.0/255.255.255.0'
-              '192.0.0.2/0.0.0.255'
-              are all functionally the same in IPv4. Similarly,
-              '192.0.2.1'
-              '192.0.2.1/255.255.255.255'
-              '192.0.2.1/32'
-              are also functionally equivalent. That is to say, failing to
-              provide a subnetmask will create an object with a mask of /32.
-
-              If the mask (portion after the / in the argument) is given in
-              dotted quad form, it is treated as a netmask if it starts with a
-              non-zero field (e.g. /255.0.0.0 == /8) and as a hostmask if it
-              starts with a zero field (e.g. 0.255.255.255 == /8), with the
-              single exception of an all-zero mask which is treated as a
-              netmask == /0. If no mask is given, a default of /32 is used.
-
-              Additionally, an integer can be passed, so
-              IPv4Network('192.0.2.1') == IPv4Network(3221225985)
-              or, more generally
-              IPv4Interface(int(IPv4Interface('192.0.2.1'))) ==
-                IPv4Interface('192.0.2.1')
-
-        Raises:
-            AddressValueError: If ipaddress isn't a valid IPv4 address.
-            NetmaskValueError: If the netmask isn't valid for
-              an IPv4 address.
-            ValueError: If strict is True and a network address is not
-              supplied.
-
-        """
-        _BaseNetwork.__init__(self, address)
-
-        # Constructing from a packed address or integer
-        if isinstance(address, (_compat_int_types, bytes)):
-            self.network_address = IPv4Address(address)
-            self.netmask, self._prefixlen = self._make_netmask(
-                self._max_prefixlen)
-            # fixme: address/network test here.
-            return
-
-        if isinstance(address, tuple):
-            if len(address) > 1:
-                arg = address[1]
-            else:
-                # We weren't given an address[1]
-                arg = self._max_prefixlen
-            self.network_address = IPv4Address(address[0])
-            self.netmask, self._prefixlen = self._make_netmask(arg)
-            packed = int(self.network_address)
-            if packed & int(self.netmask) != packed:
-                if strict:
-                    raise ValueError('%s has host bits set' % self)
-                else:
-                    self.network_address = IPv4Address(packed &
-                                                       int(self.netmask))
-            return
-
-        # Assume input argument to be string or any object representation
-        # which converts into a formatted IP prefix string.
-        addr = _split_optional_netmask(address)
-        self.network_address = IPv4Address(self._ip_int_from_string(addr[0]))
-
-        if len(addr) == 2:
-            arg = addr[1]
-        else:
-            arg = self._max_prefixlen
-        self.netmask, self._prefixlen = self._make_netmask(arg)
-
-        if strict:
-            if (IPv4Address(int(self.network_address) & int(self.netmask)) !=
-                    self.network_address):
-                raise ValueError('%s has host bits set' % self)
-        self.network_address = IPv4Address(int(self.network_address) &
-                                           int(self.netmask))
-
-        if self._prefixlen == (self._max_prefixlen - 1):
-            self.hosts = self.__iter__
-
-    @property
-    def is_global(self):
-        """Test if this address is allocated for public networks.
-
-        Returns:
-            A boolean, True if the address is not reserved per
-            iana-ipv4-special-registry.
-
-        """
-        return (not (self.network_address in IPv4Network('100.64.0.0/10') and
-                self.broadcast_address in IPv4Network('100.64.0.0/10')) and
-                not self.is_private)
-
-
-class _IPv4Constants(object):
-
-    _linklocal_network = IPv4Network('169.254.0.0/16')
-
-    _loopback_network = IPv4Network('127.0.0.0/8')
-
-    _multicast_network = IPv4Network('224.0.0.0/4')
-
-    _public_network = IPv4Network('100.64.0.0/10')
-
-    _private_networks = [
-        IPv4Network('0.0.0.0/8'),
-        IPv4Network('10.0.0.0/8'),
-        IPv4Network('127.0.0.0/8'),
-        IPv4Network('169.254.0.0/16'),
-        IPv4Network('172.16.0.0/12'),
-        IPv4Network('192.0.0.0/29'),
-        IPv4Network('192.0.0.170/31'),
-        IPv4Network('192.0.2.0/24'),
-        IPv4Network('192.168.0.0/16'),
-        IPv4Network('198.18.0.0/15'),
-        IPv4Network('198.51.100.0/24'),
-        IPv4Network('203.0.113.0/24'),
-        IPv4Network('240.0.0.0/4'),
-        IPv4Network('255.255.255.255/32'),
-    ]
-
-    _reserved_network = IPv4Network('240.0.0.0/4')
-
-    _unspecified_address = IPv4Address('0.0.0.0')
-
-
-IPv4Address._constants = _IPv4Constants
-
-
-class _BaseV6(object):
-
-    """Base IPv6 object.
-
-    The following methods are used by IPv6 objects in both single IP
-    addresses and networks.
-
-    """
-
-    __slots__ = ()
-    _version = 6
-    _ALL_ONES = (2 ** IPV6LENGTH) - 1
-    _HEXTET_COUNT = 8
-    _HEX_DIGITS = frozenset('0123456789ABCDEFabcdef')
-    _max_prefixlen = IPV6LENGTH
-
-    # There are only a bunch of valid v6 netmasks, so we cache them all
-    # when constructed (see _make_netmask()).
-    _netmask_cache = {}
-
-    @classmethod
-    def _make_netmask(cls, arg):
-        """Make a (netmask, prefix_len) tuple from the given argument.
-
-        Argument can be:
-        - an integer (the prefix length)
-        - a string representing the prefix length (e.g. "24")
-        - a string representing the prefix netmask (e.g. "255.255.255.0")
-        """
-        if arg not in cls._netmask_cache:
-            if isinstance(arg, _compat_int_types):
-                prefixlen = arg
-            else:
-                prefixlen = cls._prefix_from_prefix_string(arg)
-            netmask = IPv6Address(cls._ip_int_from_prefix(prefixlen))
-            cls._netmask_cache[arg] = netmask, prefixlen
-        return cls._netmask_cache[arg]
-
-    @classmethod
-    def _ip_int_from_string(cls, ip_str):
-        """Turn an IPv6 ip_str into an integer.
-
-        Args:
-            ip_str: A string, the IPv6 ip_str.
-
-        Returns:
-            An int, the IPv6 address
-
-        Raises:
-            AddressValueError: if ip_str isn't a valid IPv6 Address.
-
-        """
-        if not ip_str:
-            raise AddressValueError('Address cannot be empty')
-
-        parts = ip_str.split(':')
-
-        # An IPv6 address needs at least 2 colons (3 parts).
-        _min_parts = 3
-        if len(parts) < _min_parts:
-            msg = "At least %d parts expected in %r" % (_min_parts, ip_str)
-            raise AddressValueError(msg)
-
-        # If the address has an IPv4-style suffix, convert it to hexadecimal.
-        if '.' in parts[-1]:
-            try:
-                ipv4_int = IPv4Address(parts.pop())._ip
-            except AddressValueError as exc:
-                raise AddressValueError("%s in %r" % (exc, ip_str))
-            parts.append('%x' % ((ipv4_int >> 16) & 0xFFFF))
-            parts.append('%x' % (ipv4_int & 0xFFFF))
-
-        # An IPv6 address can't have more than 8 colons (9 parts).
-        # The extra colon comes from using the "::" notation for a single
-        # leading or trailing zero part.
-        _max_parts = cls._HEXTET_COUNT + 1
-        if len(parts) > _max_parts:
-            msg = "At most %d colons permitted in %r" % (
-                _max_parts - 1, ip_str)
-            raise AddressValueError(msg)
-
-        # Disregarding the endpoints, find '::' with nothing in between.
-        # This indicates that a run of zeroes has been skipped.
-        skip_index = None
-        for i in _compat_range(1, len(parts) - 1):
-            if not parts[i]:
-                if skip_index is not None:
-                    # Can't have more than one '::'
-                    msg = "At most one '::' permitted in %r" % ip_str
-                    raise AddressValueError(msg)
-                skip_index = i
-
-        # parts_hi is the number of parts to copy from above/before the '::'
-        # parts_lo is the number of parts to copy from below/after the '::'
-        if skip_index is not None:
-            # If we found a '::', then check if it also covers the endpoints.
-            parts_hi = skip_index
-            parts_lo = len(parts) - skip_index - 1
-            if not parts[0]:
-                parts_hi -= 1
-                if parts_hi:
-                    msg = "Leading ':' only permitted as part of '::' in %r"
-                    raise AddressValueError(msg % ip_str)  # ^: requires ^::
-            if not parts[-1]:
-                parts_lo -= 1
-                if parts_lo:
-                    msg = "Trailing ':' only permitted as part of '::' in %r"
-                    raise AddressValueError(msg % ip_str)  # :$ requires ::$
-            parts_skipped = cls._HEXTET_COUNT - (parts_hi + parts_lo)
-            if parts_skipped < 1:
-                msg = "Expected at most %d other parts with '::' in %r"
-                raise AddressValueError(msg % (cls._HEXTET_COUNT - 1, ip_str))
-        else:
-            # Otherwise, allocate the entire address to parts_hi.  The
-            # endpoints could still be empty, but _parse_hextet() will check
-            # for that.
-            if len(parts) != cls._HEXTET_COUNT:
-                msg = "Exactly %d parts expected without '::' in %r"
-                raise AddressValueError(msg % (cls._HEXTET_COUNT, ip_str))
-            if not parts[0]:
-                msg = "Leading ':' only permitted as part of '::' in %r"
-                raise AddressValueError(msg % ip_str)  # ^: requires ^::
-            if not parts[-1]:
-                msg = "Trailing ':' only permitted as part of '::' in %r"
-                raise AddressValueError(msg % ip_str)  # :$ requires ::$
-            parts_hi = len(parts)
-            parts_lo = 0
-            parts_skipped = 0
-
-        try:
-            # Now, parse the hextets into a 128-bit integer.
-            ip_int = 0
-            for i in range(parts_hi):
-                ip_int <<= 16
-                ip_int |= cls._parse_hextet(parts[i])
-            ip_int <<= 16 * parts_skipped
-            for i in range(-parts_lo, 0):
-                ip_int <<= 16
-                ip_int |= cls._parse_hextet(parts[i])
-            return ip_int
-        except ValueError as exc:
-            raise AddressValueError("%s in %r" % (exc, ip_str))
-
-    @classmethod
-    def _parse_hextet(cls, hextet_str):
-        """Convert an IPv6 hextet string into an integer.
-
-        Args:
-            hextet_str: A string, the number to parse.
-
-        Returns:
-            The hextet as an integer.
-
-        Raises:
-            ValueError: if the input isn't strictly a hex number from
-              [0..FFFF].
-
-        """
-        # Whitelist the characters, since int() allows a lot of bizarre stuff.
-        if not cls._HEX_DIGITS.issuperset(hextet_str):
-            raise ValueError("Only hex digits permitted in %r" % hextet_str)
-        # We do the length check second, since the invalid character error
-        # is likely to be more informative for the user
-        if len(hextet_str) > 4:
-            msg = "At most 4 characters permitted in %r"
-            raise ValueError(msg % hextet_str)
-        # Length check means we can skip checking the integer value
-        return int(hextet_str, 16)
-
-    @classmethod
-    def _compress_hextets(cls, hextets):
-        """Compresses a list of hextets.
-
-        Compresses a list of strings, replacing the longest continuous
-        sequence of "0" in the list with "" and adding empty strings at
-        the beginning or at the end of the string such that subsequently
-        calling ":".join(hextets) will produce the compressed version of
-        the IPv6 address.
-
-        Args:
-            hextets: A list of strings, the hextets to compress.
-
-        Returns:
-            A list of strings.
-
-        """
-        best_doublecolon_start = -1
-        best_doublecolon_len = 0
-        doublecolon_start = -1
-        doublecolon_len = 0
-        for index, hextet in enumerate(hextets):
-            if hextet == '0':
-                doublecolon_len += 1
-                if doublecolon_start == -1:
-                    # Start of a sequence of zeros.
-                    doublecolon_start = index
-                if doublecolon_len > best_doublecolon_len:
-                    # This is the longest sequence of zeros so far.
-                    best_doublecolon_len = doublecolon_len
-                    best_doublecolon_start = doublecolon_start
-            else:
-                doublecolon_len = 0
-                doublecolon_start = -1
-
-        if best_doublecolon_len > 1:
-            best_doublecolon_end = (best_doublecolon_start +
-                                    best_doublecolon_len)
-            # For zeros at the end of the address.
-            if best_doublecolon_end == len(hextets):
-                hextets += ['']
-            hextets[best_doublecolon_start:best_doublecolon_end] = ['']
-            # For zeros at the beginning of the address.
-            if best_doublecolon_start == 0:
-                hextets = [''] + hextets
-
-        return hextets
-
-    @classmethod
-    def _string_from_ip_int(cls, ip_int=None):
-        """Turns a 128-bit integer into hexadecimal notation.
-
-        Args:
-            ip_int: An integer, the IP address.
-
-        Returns:
-            A string, the hexadecimal representation of the address.
-
-        Raises:
-            ValueError: The address is bigger than 128 bits of all ones.
-
-        """
-        if ip_int is None:
-            ip_int = int(cls._ip)
-
-        if ip_int > cls._ALL_ONES:
-            raise ValueError('IPv6 address is too large')
-
-        hex_str = '%032x' % ip_int
-        hextets = ['%x' % int(hex_str[x:x + 4], 16) for x in range(0, 32, 4)]
-
-        hextets = cls._compress_hextets(hextets)
-        return ':'.join(hextets)
-
-    def _explode_shorthand_ip_string(self):
-        """Expand a shortened IPv6 address.
-
-        Args:
-            ip_str: A string, the IPv6 address.
-
-        Returns:
-            A string, the expanded IPv6 address.
-
-        """
-        if isinstance(self, IPv6Network):
-            ip_str = _compat_str(self.network_address)
-        elif isinstance(self, IPv6Interface):
-            ip_str = _compat_str(self.ip)
-        else:
-            ip_str = _compat_str(self)
-
-        ip_int = self._ip_int_from_string(ip_str)
-        hex_str = '%032x' % ip_int
-        parts = [hex_str[x:x + 4] for x in range(0, 32, 4)]
-        if isinstance(self, (_BaseNetwork, IPv6Interface)):
-            return '%s/%d' % (':'.join(parts), self._prefixlen)
-        return ':'.join(parts)
-
-    def _reverse_pointer(self):
-        """Return the reverse DNS pointer name for the IPv6 address.
-
-        This implements the method described in RFC3596 2.5.
-
-        """
-        reverse_chars = self.exploded[::-1].replace(':', '')
-        return '.'.join(reverse_chars) + '.ip6.arpa'
-
-    @property
-    def max_prefixlen(self):
-        return self._max_prefixlen
-
-    @property
-    def version(self):
-        return self._version
-
-
-class IPv6Address(_BaseV6, _BaseAddress):
-
-    """Represent and manipulate single IPv6 Addresses."""
-
-    __slots__ = ('_ip', '__weakref__')
-
-    def __init__(self, address):
-        """Instantiate a new IPv6 address object.
-
-        Args:
-            address: A string or integer representing the IP
-
-              Additionally, an integer can be passed, so
-              IPv6Address('2001:db8::') ==
-                IPv6Address(42540766411282592856903984951653826560)
-              or, more generally
-              IPv6Address(int(IPv6Address('2001:db8::'))) ==
-                IPv6Address('2001:db8::')
-
-        Raises:
-            AddressValueError: If address isn't a valid IPv6 address.
-
-        """
-        # Efficient constructor from integer.
-        if isinstance(address, _compat_int_types):
-            self._check_int_address(address)
-            self._ip = address
-            return
-
-        # Constructing from a packed address
-        if isinstance(address, bytes):
-            self._check_packed_address(address, 16)
-            bvs = _compat_bytes_to_byte_vals(address)
-            self._ip = _compat_int_from_byte_vals(bvs, 'big')
-            return
-
-        # Assume input argument to be string or any object representation
-        # which converts into a formatted IP string.
-        addr_str = _compat_str(address)
-        if '/' in addr_str:
-            raise AddressValueError("Unexpected '/' in %r" % address)
-        self._ip = self._ip_int_from_string(addr_str)
-
-    @property
-    def packed(self):
-        """The binary representation of this address."""
-        return v6_int_to_packed(self._ip)
-
-    @property
-    def is_multicast(self):
-        """Test if the address is reserved for multicast use.
-
-        Returns:
-            A boolean, True if the address is a multicast address.
-            See RFC 2373 2.7 for details.
-
-        """
-        return self in self._constants._multicast_network
-
-    @property
-    def is_reserved(self):
-        """Test if the address is otherwise IETF reserved.
-
-        Returns:
-            A boolean, True if the address is within one of the
-            reserved IPv6 Network ranges.
-
-        """
-        return any(self in x for x in self._constants._reserved_networks)
-
-    @property
-    def is_link_local(self):
-        """Test if the address is reserved for link-local.
-
-        Returns:
-            A boolean, True if the address is reserved per RFC 4291.
-
-        """
-        return self in self._constants._linklocal_network
-
-    @property
-    def is_site_local(self):
-        """Test if the address is reserved for site-local.
-
-        Note that the site-local address space has been deprecated by RFC 3879.
-        Use is_private to test if this address is in the space of unique local
-        addresses as defined by RFC 4193.
-
-        Returns:
-            A boolean, True if the address is reserved per RFC 3513 2.5.6.
-
-        """
-        return self in self._constants._sitelocal_network
-
-    @property
-    def is_private(self):
-        """Test if this address is allocated for private networks.
-
-        Returns:
-            A boolean, True if the address is reserved per
-            iana-ipv6-special-registry.
-
-        """
-        return any(self in net for net in self._constants._private_networks)
-
-    @property
-    def is_global(self):
-        """Test if this address is allocated for public networks.
-
-        Returns:
-            A boolean, true if the address is not reserved per
-            iana-ipv6-special-registry.
-
-        """
-        return not self.is_private
-
-    @property
-    def is_unspecified(self):
-        """Test if the address is unspecified.
-
-        Returns:
-            A boolean, True if this is the unspecified address as defined in
-            RFC 2373 2.5.2.
-
-        """
-        return self._ip == 0
-
-    @property
-    def is_loopback(self):
-        """Test if the address is a loopback address.
-
-        Returns:
-            A boolean, True if the address is a loopback address as defined in
-            RFC 2373 2.5.3.
-
-        """
-        return self._ip == 1
-
-    @property
-    def ipv4_mapped(self):
-        """Return the IPv4 mapped address.
-
-        Returns:
-            If the IPv6 address is a v4 mapped address, return the
-            IPv4 mapped address. Return None otherwise.
-
-        """
-        if (self._ip >> 32) != 0xFFFF:
-            return None
-        return IPv4Address(self._ip & 0xFFFFFFFF)
-
-    @property
-    def teredo(self):
-        """Tuple of embedded teredo IPs.
-
-        Returns:
-            Tuple of the (server, client) IPs or None if the address
-            doesn't appear to be a teredo address (doesn't start with
-            2001::/32)
-
-        """
-        if (self._ip >> 96) != 0x20010000:
-            return None
-        return (IPv4Address((self._ip >> 64) & 0xFFFFFFFF),
-                IPv4Address(~self._ip & 0xFFFFFFFF))
-
-    @property
-    def sixtofour(self):
-        """Return the IPv4 6to4 embedded address.
-
-        Returns:
-            The IPv4 6to4-embedded address if present or None if the
-            address doesn't appear to contain a 6to4 embedded address.
-
-        """
-        if (self._ip >> 112) != 0x2002:
-            return None
-        return IPv4Address((self._ip >> 80) & 0xFFFFFFFF)
-
-
-class IPv6Interface(IPv6Address):
-
-    def __init__(self, address):
-        if isinstance(address, (bytes, _compat_int_types)):
-            IPv6Address.__init__(self, address)
-            self.network = IPv6Network(self._ip)
-            self._prefixlen = self._max_prefixlen
-            return
-        if isinstance(address, tuple):
-            IPv6Address.__init__(self, address[0])
-            if len(address) > 1:
-                self._prefixlen = int(address[1])
-            else:
-                self._prefixlen = self._max_prefixlen
-            self.network = IPv6Network(address, strict=False)
-            self.netmask = self.network.netmask
-            self.hostmask = self.network.hostmask
-            return
-
-        addr = _split_optional_netmask(address)
-        IPv6Address.__init__(self, addr[0])
-        self.network = IPv6Network(address, strict=False)
-        self.netmask = self.network.netmask
-        self._prefixlen = self.network._prefixlen
-        self.hostmask = self.network.hostmask
-
-    def __str__(self):
-        return '%s/%d' % (self._string_from_ip_int(self._ip),
-                          self.network.prefixlen)
-
-    def __eq__(self, other):
-        address_equal = IPv6Address.__eq__(self, other)
-        if not address_equal or address_equal is NotImplemented:
-            return address_equal
-        try:
-            return self.network == other.network
-        except AttributeError:
-            # An interface with an associated network is NOT the
-            # same as an unassociated address. That's why the hash
-            # takes the extra info into account.
-            return False
-
-    def __lt__(self, other):
-        address_less = IPv6Address.__lt__(self, other)
-        if address_less is NotImplemented:
-            return NotImplemented
-        try:
-            return (self.network < other.network or
-                    self.network == other.network and address_less)
-        except AttributeError:
-            # We *do* allow addresses and interfaces to be sorted. The
-            # unassociated address is considered less than all interfaces.
-            return False
-
-    def __hash__(self):
-        return self._ip ^ self._prefixlen ^ int(self.network.network_address)
-
-    __reduce__ = _IPAddressBase.__reduce__
-
-    @property
-    def ip(self):
-        return IPv6Address(self._ip)
-
-    @property
-    def with_prefixlen(self):
-        return '%s/%s' % (self._string_from_ip_int(self._ip),
-                          self._prefixlen)
-
-    @property
-    def with_netmask(self):
-        return '%s/%s' % (self._string_from_ip_int(self._ip),
-                          self.netmask)
-
-    @property
-    def with_hostmask(self):
-        return '%s/%s' % (self._string_from_ip_int(self._ip),
-                          self.hostmask)
-
-    @property
-    def is_unspecified(self):
-        return self._ip == 0 and self.network.is_unspecified
-
-    @property
-    def is_loopback(self):
-        return self._ip == 1 and self.network.is_loopback
-
-
-class IPv6Network(_BaseV6, _BaseNetwork):
-
-    """This class represents and manipulates 128-bit IPv6 networks.
-
-    Attributes: [examples for IPv6('2001:db8::1000/124')]
-        .network_address: IPv6Address('2001:db8::1000')
-        .hostmask: IPv6Address('::f')
-        .broadcast_address: IPv6Address('2001:db8::100f')
-        .netmask: IPv6Address('ffff:ffff:ffff:ffff:ffff:ffff:ffff:fff0')
-        .prefixlen: 124
-
-    """
-
-    # Class to use when creating address objects
-    _address_class = IPv6Address
-
-    def __init__(self, address, strict=True):
-        """Instantiate a new IPv6 Network object.
-
-        Args:
-            address: A string or integer representing the IPv6 network or the
-              IP and prefix/netmask.
-              '2001:db8::/128'
-              '2001:db8:0000:0000:0000:0000:0000:0000/128'
-              '2001:db8::'
-              are all functionally the same in IPv6.  That is to say,
-              failing to provide a subnetmask will create an object with
-              a mask of /128.
-
-              Additionally, an integer can be passed, so
-              IPv6Network('2001:db8::') ==
-                IPv6Network(42540766411282592856903984951653826560)
-              or, more generally
-              IPv6Network(int(IPv6Network('2001:db8::'))) ==
-                IPv6Network('2001:db8::')
-
-            strict: A boolean. If true, ensure that we have been passed
-              A true network address, eg, 2001:db8::1000/124 and not an
-              IP address on a network, eg, 2001:db8::1/124.
-
-        Raises:
-            AddressValueError: If address isn't a valid IPv6 address.
-            NetmaskValueError: If the netmask isn't valid for
-              an IPv6 address.
-            ValueError: If strict was True and a network address was not
-              supplied.
-
-        """
-        _BaseNetwork.__init__(self, address)
-
-        # Efficient constructor from integer or packed address
-        if isinstance(address, (bytes, _compat_int_types)):
-            self.network_address = IPv6Address(address)
-            self.netmask, self._prefixlen = self._make_netmask(
-                self._max_prefixlen)
-            return
-
-        if isinstance(address, tuple):
-            if len(address) > 1:
-                arg = address[1]
-            else:
-                arg = self._max_prefixlen
-            self.netmask, self._prefixlen = self._make_netmask(arg)
-            self.network_address = IPv6Address(address[0])
-            packed = int(self.network_address)
-            if packed & int(self.netmask) != packed:
-                if strict:
-                    raise ValueError('%s has host bits set' % self)
-                else:
-                    self.network_address = IPv6Address(packed &
-                                                       int(self.netmask))
-            return
-
-        # Assume input argument to be string or any object representation
-        # which converts into a formatted IP prefix string.
-        addr = _split_optional_netmask(address)
-
-        self.network_address = IPv6Address(self._ip_int_from_string(addr[0]))
-
-        if len(addr) == 2:
-            arg = addr[1]
-        else:
-            arg = self._max_prefixlen
-        self.netmask, self._prefixlen = self._make_netmask(arg)
-
-        if strict:
-            if (IPv6Address(int(self.network_address) & int(self.netmask)) !=
-                    self.network_address):
-                raise ValueError('%s has host bits set' % self)
-        self.network_address = IPv6Address(int(self.network_address) &
-                                           int(self.netmask))
-
-        if self._prefixlen == (self._max_prefixlen - 1):
-            self.hosts = self.__iter__
-
-    def hosts(self):
-        """Generate Iterator over usable hosts in a network.
-
-          This is like __iter__ except it doesn't return the
-          Subnet-Router anycast address.
-
-        """
-        network = int(self.network_address)
-        broadcast = int(self.broadcast_address)
-        for x in _compat_range(network + 1, broadcast + 1):
-            yield self._address_class(x)
-
-    @property
-    def is_site_local(self):
-        """Test if the address is reserved for site-local.
-
-        Note that the site-local address space has been deprecated by RFC 3879.
-        Use is_private to test if this address is in the space of unique local
-        addresses as defined by RFC 4193.
-
-        Returns:
-            A boolean, True if the address is reserved per RFC 3513 2.5.6.
-
-        """
-        return (self.network_address.is_site_local and
-                self.broadcast_address.is_site_local)
-
-
-class _IPv6Constants(object):
-
-    _linklocal_network = IPv6Network('fe80::/10')
-
-    _multicast_network = IPv6Network('ff00::/8')
-
-    _private_networks = [
-        IPv6Network('::1/128'),
-        IPv6Network('::/128'),
-        IPv6Network('::ffff:0:0/96'),
-        IPv6Network('100::/64'),
-        IPv6Network('2001::/23'),
-        IPv6Network('2001:2::/48'),
-        IPv6Network('2001:db8::/32'),
-        IPv6Network('2001:10::/28'),
-        IPv6Network('fc00::/7'),
-        IPv6Network('fe80::/10'),
-    ]
-
-    _reserved_networks = [
-        IPv6Network('::/8'), IPv6Network('100::/8'),
-        IPv6Network('200::/7'), IPv6Network('400::/6'),
-        IPv6Network('800::/5'), IPv6Network('1000::/4'),
-        IPv6Network('4000::/3'), IPv6Network('6000::/3'),
-        IPv6Network('8000::/3'), IPv6Network('A000::/3'),
-        IPv6Network('C000::/3'), IPv6Network('E000::/4'),
-        IPv6Network('F000::/5'), IPv6Network('F800::/6'),
-        IPv6Network('FE00::/9'),
-    ]
-
-    _sitelocal_network = IPv6Network('fec0::/10')
-
-
-IPv6Address._constants = _IPv6Constants
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/lockfile/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/lockfile/__init__.py
deleted file mode 100644
index a6f44a5..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/lockfile/__init__.py
+++ /dev/null
@@ -1,347 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-lockfile.py - Platform-independent advisory file locks.
-
-Requires Python 2.5 unless you apply 2.4.diff
-Locking is done on a per-thread basis instead of a per-process basis.
-
-Usage:
-
->>> lock = LockFile('somefile')
->>> try:
-...     lock.acquire()
-... except AlreadyLocked:
-...     print 'somefile', 'is locked already.'
-... except LockFailed:
-...     print 'somefile', 'can\\'t be locked.'
-... else:
-...     print 'got lock'
-got lock
->>> print lock.is_locked()
-True
->>> lock.release()
-
->>> lock = LockFile('somefile')
->>> print lock.is_locked()
-False
->>> with lock:
-...    print lock.is_locked()
-True
->>> print lock.is_locked()
-False
-
->>> lock = LockFile('somefile')
->>> # It is okay to lock twice from the same thread...
->>> with lock:
-...     lock.acquire()
-...
->>> # Though no counter is kept, so you can't unlock multiple times...
->>> print lock.is_locked()
-False
-
-Exceptions:
-
-    Error - base class for other exceptions
-        LockError - base class for all locking exceptions
-            AlreadyLocked - Another thread or process already holds the lock
-            LockFailed - Lock failed for some other reason
-        UnlockError - base class for all unlocking exceptions
-            AlreadyUnlocked - File was not locked.
-            NotMyLock - File was locked but not by the current thread/process
-"""
-
-from __future__ import absolute_import
-
-import functools
-import os
-import socket
-import threading
-import warnings
-
-# Work with PEP8 and non-PEP8 versions of threading module.
-if not hasattr(threading, "current_thread"):
-    threading.current_thread = threading.currentThread
-if not hasattr(threading.Thread, "get_name"):
-    threading.Thread.get_name = threading.Thread.getName
-
-__all__ = ['Error', 'LockError', 'LockTimeout', 'AlreadyLocked',
-           'LockFailed', 'UnlockError', 'NotLocked', 'NotMyLock',
-           'LinkFileLock', 'MkdirFileLock', 'SQLiteFileLock',
-           'LockBase', 'locked']
-
-
-class Error(Exception):
-    """
-    Base class for other exceptions.
-
-    >>> try:
-    ...   raise Error
-    ... except Exception:
-    ...   pass
-    """
-    pass
-
-
-class LockError(Error):
-    """
-    Base class for error arising from attempts to acquire the lock.
-
-    >>> try:
-    ...   raise LockError
-    ... except Error:
-    ...   pass
-    """
-    pass
-
-
-class LockTimeout(LockError):
-    """Raised when lock creation fails within a user-defined period of time.
-
-    >>> try:
-    ...   raise LockTimeout
-    ... except LockError:
-    ...   pass
-    """
-    pass
-
-
-class AlreadyLocked(LockError):
-    """Some other thread/process is locking the file.
-
-    >>> try:
-    ...   raise AlreadyLocked
-    ... except LockError:
-    ...   pass
-    """
-    pass
-
-
-class LockFailed(LockError):
-    """Lock file creation failed for some other reason.
-
-    >>> try:
-    ...   raise LockFailed
-    ... except LockError:
-    ...   pass
-    """
-    pass
-
-
-class UnlockError(Error):
-    """
-    Base class for errors arising from attempts to release the lock.
-
-    >>> try:
-    ...   raise UnlockError
-    ... except Error:
-    ...   pass
-    """
-    pass
-
-
-class NotLocked(UnlockError):
-    """Raised when an attempt is made to unlock an unlocked file.
-
-    >>> try:
-    ...   raise NotLocked
-    ... except UnlockError:
-    ...   pass
-    """
-    pass
-
-
-class NotMyLock(UnlockError):
-    """Raised when an attempt is made to unlock a file someone else locked.
-
-    >>> try:
-    ...   raise NotMyLock
-    ... except UnlockError:
-    ...   pass
-    """
-    pass
-
-
-class _SharedBase(object):
-    def __init__(self, path):
-        self.path = path
-
-    def acquire(self, timeout=None):
-        """
-        Acquire the lock.
-
-        * If timeout is omitted (or None), wait forever trying to lock the
-          file.
-
-        * If timeout > 0, try to acquire the lock for that many seconds.  If
-          the lock period expires and the file is still locked, raise
-          LockTimeout.
-
-        * If timeout <= 0, raise AlreadyLocked immediately if the file is
-          already locked.
-        """
-        raise NotImplemented("implement in subclass")
-
-    def release(self):
-        """
-        Release the lock.
-
-        If the file is not locked, raise NotLocked.
-        """
-        raise NotImplemented("implement in subclass")
-
-    def __enter__(self):
-        """
-        Context manager support.
-        """
-        self.acquire()
-        return self
-
-    def __exit__(self, *_exc):
-        """
-        Context manager support.
-        """
-        self.release()
-
-    def __repr__(self):
-        return "<%s: %r>" % (self.__class__.__name__, self.path)
-
-
-class LockBase(_SharedBase):
-    """Base class for platform-specific lock classes."""
-    def __init__(self, path, threaded=True, timeout=None):
-        """
-        >>> lock = LockBase('somefile')
-        >>> lock = LockBase('somefile', threaded=False)
-        """
-        super(LockBase, self).__init__(path)
-        self.lock_file = os.path.abspath(path) + ".lock"
-        self.hostname = socket.gethostname()
-        self.pid = os.getpid()
-        if threaded:
-            t = threading.current_thread()
-            # Thread objects in Python 2.4 and earlier do not have ident
-            # attrs.  Worm around that.
-            ident = getattr(t, "ident", hash(t))
-            self.tname = "-%x" % (ident & 0xffffffff)
-        else:
-            self.tname = ""
-        dirname = os.path.dirname(self.lock_file)
-
-        # unique name is mostly about the current process, but must
-        # also contain the path -- otherwise, two adjacent locked
-        # files conflict (one file gets locked, creating lock-file and
-        # unique file, the other one gets locked, creating lock-file
-        # and overwriting the already existing lock-file, then one
-        # gets unlocked, deleting both lock-file and unique file,
-        # finally the last lock errors out upon releasing.
-        self.unique_name = os.path.join(dirname,
-                                        "%s%s.%s%s" % (self.hostname,
-                                                       self.tname,
-                                                       self.pid,
-                                                       hash(self.path)))
-        self.timeout = timeout
-
-    def is_locked(self):
-        """
-        Tell whether or not the file is locked.
-        """
-        raise NotImplemented("implement in subclass")
-
-    def i_am_locking(self):
-        """
-        Return True if this object is locking the file.
-        """
-        raise NotImplemented("implement in subclass")
-
-    def break_lock(self):
-        """
-        Remove a lock.  Useful if a locking thread failed to unlock.
-        """
-        raise NotImplemented("implement in subclass")
-
-    def __repr__(self):
-        return "<%s: %r -- %r>" % (self.__class__.__name__, self.unique_name,
-                                   self.path)
-
-
-def _fl_helper(cls, mod, *args, **kwds):
-    warnings.warn("Import from %s module instead of lockfile package" % mod,
-                  DeprecationWarning, stacklevel=2)
-    # This is a bit funky, but it's only for awhile.  The way the unit tests
-    # are constructed this function winds up as an unbound method, so it
-    # actually takes three args, not two.  We want to toss out self.
-    if not isinstance(args[0], str):
-        # We are testing, avoid the first arg
-        args = args[1:]
-    if len(args) == 1 and not kwds:
-        kwds["threaded"] = True
-    return cls(*args, **kwds)
-
-
-def LinkFileLock(*args, **kwds):
-    """Factory function provided for backwards compatibility.
-
-    Do not use in new code.  Instead, import LinkLockFile from the
-    lockfile.linklockfile module.
-    """
-    from . import linklockfile
-    return _fl_helper(linklockfile.LinkLockFile, "lockfile.linklockfile",
-                      *args, **kwds)
-
-
-def MkdirFileLock(*args, **kwds):
-    """Factory function provided for backwards compatibility.
-
-    Do not use in new code.  Instead, import MkdirLockFile from the
-    lockfile.mkdirlockfile module.
-    """
-    from . import mkdirlockfile
-    return _fl_helper(mkdirlockfile.MkdirLockFile, "lockfile.mkdirlockfile",
-                      *args, **kwds)
-
-
-def SQLiteFileLock(*args, **kwds):
-    """Factory function provided for backwards compatibility.
-
-    Do not use in new code.  Instead, import SQLiteLockFile from the
-    lockfile.mkdirlockfile module.
-    """
-    from . import sqlitelockfile
-    return _fl_helper(sqlitelockfile.SQLiteLockFile, "lockfile.sqlitelockfile",
-                      *args, **kwds)
-
-
-def locked(path, timeout=None):
-    """Decorator which enables locks for decorated function.
-
-    Arguments:
-     - path: path for lockfile.
-     - timeout (optional): Timeout for acquiring lock.
-
-     Usage:
-         @locked('/var/run/myname', timeout=0)
-         def myname(...):
-             ...
-    """
-    def decor(func):
-        @functools.wraps(func)
-        def wrapper(*args, **kwargs):
-            lock = FileLock(path, timeout=timeout)
-            lock.acquire()
-            try:
-                return func(*args, **kwargs)
-            finally:
-                lock.release()
-        return wrapper
-    return decor
-
-
-if hasattr(os, "link"):
-    from . import linklockfile as _llf
-    LockFile = _llf.LinkLockFile
-else:
-    from . import mkdirlockfile as _mlf
-    LockFile = _mlf.MkdirLockFile
-
-FileLock = LockFile
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/lockfile/linklockfile.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/lockfile/linklockfile.py
deleted file mode 100644
index 2ca9be0..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/lockfile/linklockfile.py
+++ /dev/null
@@ -1,73 +0,0 @@
-from __future__ import absolute_import
-
-import time
-import os
-
-from . import (LockBase, LockFailed, NotLocked, NotMyLock, LockTimeout,
-               AlreadyLocked)
-
-
-class LinkLockFile(LockBase):
-    """Lock access to a file using atomic property of link(2).
-
-    >>> lock = LinkLockFile('somefile')
-    >>> lock = LinkLockFile('somefile', threaded=False)
-    """
-
-    def acquire(self, timeout=None):
-        try:
-            open(self.unique_name, "wb").close()
-        except IOError:
-            raise LockFailed("failed to create %s" % self.unique_name)
-
-        timeout = timeout if timeout is not None else self.timeout
-        end_time = time.time()
-        if timeout is not None and timeout > 0:
-            end_time += timeout
-
-        while True:
-            # Try and create a hard link to it.
-            try:
-                os.link(self.unique_name, self.lock_file)
-            except OSError:
-                # Link creation failed.  Maybe we've double-locked?
-                nlinks = os.stat(self.unique_name).st_nlink
-                if nlinks == 2:
-                    # The original link plus the one I created == 2.  We're
-                    # good to go.
-                    return
-                else:
-                    # Otherwise the lock creation failed.
-                    if timeout is not None and time.time() > end_time:
-                        os.unlink(self.unique_name)
-                        if timeout > 0:
-                            raise LockTimeout("Timeout waiting to acquire"
-                                              " lock for %s" %
-                                              self.path)
-                        else:
-                            raise AlreadyLocked("%s is already locked" %
-                                                self.path)
-                    time.sleep(timeout is not None and timeout / 10 or 0.1)
-            else:
-                # Link creation succeeded.  We're good to go.
-                return
-
-    def release(self):
-        if not self.is_locked():
-            raise NotLocked("%s is not locked" % self.path)
-        elif not os.path.exists(self.unique_name):
-            raise NotMyLock("%s is locked, but not by me" % self.path)
-        os.unlink(self.unique_name)
-        os.unlink(self.lock_file)
-
-    def is_locked(self):
-        return os.path.exists(self.lock_file)
-
-    def i_am_locking(self):
-        return (self.is_locked() and
-                os.path.exists(self.unique_name) and
-                os.stat(self.unique_name).st_nlink == 2)
-
-    def break_lock(self):
-        if os.path.exists(self.lock_file):
-            os.unlink(self.lock_file)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/lockfile/mkdirlockfile.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/lockfile/mkdirlockfile.py
deleted file mode 100644
index 05a8c96..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/lockfile/mkdirlockfile.py
+++ /dev/null
@@ -1,84 +0,0 @@
-from __future__ import absolute_import, division
-
-import time
-import os
-import sys
-import errno
-
-from . import (LockBase, LockFailed, NotLocked, NotMyLock, LockTimeout,
-               AlreadyLocked)
-
-
-class MkdirLockFile(LockBase):
-    """Lock file by creating a directory."""
-    def __init__(self, path, threaded=True, timeout=None):
-        """
-        >>> lock = MkdirLockFile('somefile')
-        >>> lock = MkdirLockFile('somefile', threaded=False)
-        """
-        LockBase.__init__(self, path, threaded, timeout)
-        # Lock file itself is a directory.  Place the unique file name into
-        # it.
-        self.unique_name = os.path.join(self.lock_file,
-                                        "%s.%s%s" % (self.hostname,
-                                                     self.tname,
-                                                     self.pid))
-
-    def acquire(self, timeout=None):
-        timeout = timeout if timeout is not None else self.timeout
-        end_time = time.time()
-        if timeout is not None and timeout > 0:
-            end_time += timeout
-
-        if timeout is None:
-            wait = 0.1
-        else:
-            wait = max(0, timeout / 10)
-
-        while True:
-            try:
-                os.mkdir(self.lock_file)
-            except OSError:
-                err = sys.exc_info()[1]
-                if err.errno == errno.EEXIST:
-                    # Already locked.
-                    if os.path.exists(self.unique_name):
-                        # Already locked by me.
-                        return
-                    if timeout is not None and time.time() > end_time:
-                        if timeout > 0:
-                            raise LockTimeout("Timeout waiting to acquire"
-                                              " lock for %s" %
-                                              self.path)
-                        else:
-                            # Someone else has the lock.
-                            raise AlreadyLocked("%s is already locked" %
-                                                self.path)
-                    time.sleep(wait)
-                else:
-                    # Couldn't create the lock for some other reason
-                    raise LockFailed("failed to create %s" % self.lock_file)
-            else:
-                open(self.unique_name, "wb").close()
-                return
-
-    def release(self):
-        if not self.is_locked():
-            raise NotLocked("%s is not locked" % self.path)
-        elif not os.path.exists(self.unique_name):
-            raise NotMyLock("%s is locked, but not by me" % self.path)
-        os.unlink(self.unique_name)
-        os.rmdir(self.lock_file)
-
-    def is_locked(self):
-        return os.path.exists(self.lock_file)
-
-    def i_am_locking(self):
-        return (self.is_locked() and
-                os.path.exists(self.unique_name))
-
-    def break_lock(self):
-        if os.path.exists(self.lock_file):
-            for name in os.listdir(self.lock_file):
-                os.unlink(os.path.join(self.lock_file, name))
-            os.rmdir(self.lock_file)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/lockfile/pidlockfile.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/lockfile/pidlockfile.py
deleted file mode 100644
index 069e85b..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/lockfile/pidlockfile.py
+++ /dev/null
@@ -1,190 +0,0 @@
-# -*- coding: utf-8 -*-
-
-# pidlockfile.py
-#
-# Copyright © 2008–2009 Ben Finney <ben+python@benfinney.id.au>
-#
-# This is free software: you may copy, modify, and/or distribute this work
-# under the terms of the Python Software Foundation License, version 2 or
-# later as published by the Python Software Foundation.
-# No warranty expressed or implied. See the file LICENSE.PSF-2 for details.
-
-""" Lockfile behaviour implemented via Unix PID files.
-    """
-
-from __future__ import absolute_import
-
-import errno
-import os
-import time
-
-from . import (LockBase, AlreadyLocked, LockFailed, NotLocked, NotMyLock,
-               LockTimeout)
-
-
-class PIDLockFile(LockBase):
-    """ Lockfile implemented as a Unix PID file.
-
-    The lock file is a normal file named by the attribute `path`.
-    A lock's PID file contains a single line of text, containing
-    the process ID (PID) of the process that acquired the lock.
-
-    >>> lock = PIDLockFile('somefile')
-    >>> lock = PIDLockFile('somefile')
-    """
-
-    def __init__(self, path, threaded=False, timeout=None):
-        # pid lockfiles don't support threaded operation, so always force
-        # False as the threaded arg.
-        LockBase.__init__(self, path, False, timeout)
-        self.unique_name = self.path
-
-    def read_pid(self):
-        """ Get the PID from the lock file.
-            """
-        return read_pid_from_pidfile(self.path)
-
-    def is_locked(self):
-        """ Test if the lock is currently held.
-
-            The lock is held if the PID file for this lock exists.
-
-            """
-        return os.path.exists(self.path)
-
-    def i_am_locking(self):
-        """ Test if the lock is held by the current process.
-
-        Returns ``True`` if the current process ID matches the
-        number stored in the PID file.
-        """
-        return self.is_locked() and os.getpid() == self.read_pid()
-
-    def acquire(self, timeout=None):
-        """ Acquire the lock.
-
-        Creates the PID file for this lock, or raises an error if
-        the lock could not be acquired.
-        """
-
-        timeout = timeout if timeout is not None else self.timeout
-        end_time = time.time()
-        if timeout is not None and timeout > 0:
-            end_time += timeout
-
-        while True:
-            try:
-                write_pid_to_pidfile(self.path)
-            except OSError as exc:
-                if exc.errno == errno.EEXIST:
-                    # The lock creation failed.  Maybe sleep a bit.
-                    if time.time() > end_time:
-                        if timeout is not None and timeout > 0:
-                            raise LockTimeout("Timeout waiting to acquire"
-                                              " lock for %s" %
-                                              self.path)
-                        else:
-                            raise AlreadyLocked("%s is already locked" %
-                                                self.path)
-                    time.sleep(timeout is not None and timeout / 10 or 0.1)
-                else:
-                    raise LockFailed("failed to create %s" % self.path)
-            else:
-                return
-
-    def release(self):
-        """ Release the lock.
-
-            Removes the PID file to release the lock, or raises an
-            error if the current process does not hold the lock.
-
-            """
-        if not self.is_locked():
-            raise NotLocked("%s is not locked" % self.path)
-        if not self.i_am_locking():
-            raise NotMyLock("%s is locked, but not by me" % self.path)
-        remove_existing_pidfile(self.path)
-
-    def break_lock(self):
-        """ Break an existing lock.
-
-            Removes the PID file if it already exists, otherwise does
-            nothing.
-
-            """
-        remove_existing_pidfile(self.path)
-
-
-def read_pid_from_pidfile(pidfile_path):
-    """ Read the PID recorded in the named PID file.
-
-        Read and return the numeric PID recorded as text in the named
-        PID file. If the PID file cannot be read, or if the content is
-        not a valid PID, return ``None``.
-
-        """
-    pid = None
-    try:
-        pidfile = open(pidfile_path, 'r')
-    except IOError:
-        pass
-    else:
-        # According to the FHS 2.3 section on PID files in /var/run:
-        #
-        #   The file must consist of the process identifier in
-        #   ASCII-encoded decimal, followed by a newline character.
-        #
-        #   Programs that read PID files should be somewhat flexible
-        #   in what they accept; i.e., they should ignore extra
-        #   whitespace, leading zeroes, absence of the trailing
-        #   newline, or additional lines in the PID file.
-
-        line = pidfile.readline().strip()
-        try:
-            pid = int(line)
-        except ValueError:
-            pass
-        pidfile.close()
-
-    return pid
-
-
-def write_pid_to_pidfile(pidfile_path):
-    """ Write the PID in the named PID file.
-
-        Get the numeric process ID (“PID”) of the current process
-        and write it to the named file as a line of text.
-
-        """
-    open_flags = (os.O_CREAT | os.O_EXCL | os.O_WRONLY)
-    open_mode = 0o644
-    pidfile_fd = os.open(pidfile_path, open_flags, open_mode)
-    pidfile = os.fdopen(pidfile_fd, 'w')
-
-    # According to the FHS 2.3 section on PID files in /var/run:
-    #
-    #   The file must consist of the process identifier in
-    #   ASCII-encoded decimal, followed by a newline character. For
-    #   example, if crond was process number 25, /var/run/crond.pid
-    #   would contain three characters: two, five, and newline.
-
-    pid = os.getpid()
-    pidfile.write("%s\n" % pid)
-    pidfile.close()
-
-
-def remove_existing_pidfile(pidfile_path):
-    """ Remove the named PID file if it exists.
-
-        Removing a PID file that doesn't already exist puts us in the
-        desired state, so we ignore the condition if the file does not
-        exist.
-
-        """
-    try:
-        os.remove(pidfile_path)
-    except OSError as exc:
-        if exc.errno == errno.ENOENT:
-            pass
-        else:
-            raise
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/lockfile/sqlitelockfile.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/lockfile/sqlitelockfile.py
deleted file mode 100644
index f997e24..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/lockfile/sqlitelockfile.py
+++ /dev/null
@@ -1,156 +0,0 @@
-from __future__ import absolute_import, division
-
-import time
-import os
-
-try:
-    unicode
-except NameError:
-    unicode = str
-
-from . import LockBase, NotLocked, NotMyLock, LockTimeout, AlreadyLocked
-
-
-class SQLiteLockFile(LockBase):
-    "Demonstrate SQL-based locking."
-
-    testdb = None
-
-    def __init__(self, path, threaded=True, timeout=None):
-        """
-        >>> lock = SQLiteLockFile('somefile')
-        >>> lock = SQLiteLockFile('somefile', threaded=False)
-        """
-        LockBase.__init__(self, path, threaded, timeout)
-        self.lock_file = unicode(self.lock_file)
-        self.unique_name = unicode(self.unique_name)
-
-        if SQLiteLockFile.testdb is None:
-            import tempfile
-            _fd, testdb = tempfile.mkstemp()
-            os.close(_fd)
-            os.unlink(testdb)
-            del _fd, tempfile
-            SQLiteLockFile.testdb = testdb
-
-        import sqlite3
-        self.connection = sqlite3.connect(SQLiteLockFile.testdb)
-
-        c = self.connection.cursor()
-        try:
-            c.execute("create table locks"
-                      "("
-                      "   lock_file varchar(32),"
-                      "   unique_name varchar(32)"
-                      ")")
-        except sqlite3.OperationalError:
-            pass
-        else:
-            self.connection.commit()
-            import atexit
-            atexit.register(os.unlink, SQLiteLockFile.testdb)
-
-    def acquire(self, timeout=None):
-        timeout = timeout if timeout is not None else self.timeout
-        end_time = time.time()
-        if timeout is not None and timeout > 0:
-            end_time += timeout
-
-        if timeout is None:
-            wait = 0.1
-        elif timeout <= 0:
-            wait = 0
-        else:
-            wait = timeout / 10
-
-        cursor = self.connection.cursor()
-
-        while True:
-            if not self.is_locked():
-                # Not locked.  Try to lock it.
-                cursor.execute("insert into locks"
-                               "  (lock_file, unique_name)"
-                               "  values"
-                               "  (?, ?)",
-                               (self.lock_file, self.unique_name))
-                self.connection.commit()
-
-                # Check to see if we are the only lock holder.
-                cursor.execute("select * from locks"
-                               "  where unique_name = ?",
-                               (self.unique_name,))
-                rows = cursor.fetchall()
-                if len(rows) > 1:
-                    # Nope.  Someone else got there.  Remove our lock.
-                    cursor.execute("delete from locks"
-                                   "  where unique_name = ?",
-                                   (self.unique_name,))
-                    self.connection.commit()
-                else:
-                    # Yup.  We're done, so go home.
-                    return
-            else:
-                # Check to see if we are the only lock holder.
-                cursor.execute("select * from locks"
-                               "  where unique_name = ?",
-                               (self.unique_name,))
-                rows = cursor.fetchall()
-                if len(rows) == 1:
-                    # We're the locker, so go home.
-                    return
-
-            # Maybe we should wait a bit longer.
-            if timeout is not None and time.time() > end_time:
-                if timeout > 0:
-                    # No more waiting.
-                    raise LockTimeout("Timeout waiting to acquire"
-                                      " lock for %s" %
-                                      self.path)
-                else:
-                    # Someone else has the lock and we are impatient..
-                    raise AlreadyLocked("%s is already locked" % self.path)
-
-            # Well, okay.  We'll give it a bit longer.
-            time.sleep(wait)
-
-    def release(self):
-        if not self.is_locked():
-            raise NotLocked("%s is not locked" % self.path)
-        if not self.i_am_locking():
-            raise NotMyLock("%s is locked, but not by me (by %s)" %
-                            (self.unique_name, self._who_is_locking()))
-        cursor = self.connection.cursor()
-        cursor.execute("delete from locks"
-                       "  where unique_name = ?",
-                       (self.unique_name,))
-        self.connection.commit()
-
-    def _who_is_locking(self):
-        cursor = self.connection.cursor()
-        cursor.execute("select unique_name from locks"
-                       "  where lock_file = ?",
-                       (self.lock_file,))
-        return cursor.fetchone()[0]
-
-    def is_locked(self):
-        cursor = self.connection.cursor()
-        cursor.execute("select * from locks"
-                       "  where lock_file = ?",
-                       (self.lock_file,))
-        rows = cursor.fetchall()
-        return not not rows
-
-    def i_am_locking(self):
-        cursor = self.connection.cursor()
-        cursor.execute("select * from locks"
-                       "  where lock_file = ?"
-                       "    and unique_name = ?",
-                       (self.lock_file, self.unique_name))
-        return not not cursor.fetchall()
-
-    def break_lock(self):
-        cursor = self.connection.cursor()
-        cursor.execute("delete from locks"
-                       "  where lock_file = ?",
-                       (self.lock_file,))
-        self.connection.commit()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/lockfile/symlinklockfile.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/lockfile/symlinklockfile.py
deleted file mode 100644
index 23b41f5..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/lockfile/symlinklockfile.py
+++ /dev/null
@@ -1,70 +0,0 @@
-from __future__ import absolute_import
-
-import os
-import time
-
-from . import (LockBase, NotLocked, NotMyLock, LockTimeout,
-               AlreadyLocked)
-
-
-class SymlinkLockFile(LockBase):
-    """Lock access to a file using symlink(2)."""
-
-    def __init__(self, path, threaded=True, timeout=None):
-        # super(SymlinkLockFile).__init(...)
-        LockBase.__init__(self, path, threaded, timeout)
-        # split it back!
-        self.unique_name = os.path.split(self.unique_name)[1]
-
-    def acquire(self, timeout=None):
-        # Hopefully unnecessary for symlink.
-        # try:
-        #     open(self.unique_name, "wb").close()
-        # except IOError:
-        #     raise LockFailed("failed to create %s" % self.unique_name)
-        timeout = timeout if timeout is not None else self.timeout
-        end_time = time.time()
-        if timeout is not None and timeout > 0:
-            end_time += timeout
-
-        while True:
-            # Try and create a symbolic link to it.
-            try:
-                os.symlink(self.unique_name, self.lock_file)
-            except OSError:
-                # Link creation failed.  Maybe we've double-locked?
-                if self.i_am_locking():
-                    # Linked to out unique name. Proceed.
-                    return
-                else:
-                    # Otherwise the lock creation failed.
-                    if timeout is not None and time.time() > end_time:
-                        if timeout > 0:
-                            raise LockTimeout("Timeout waiting to acquire"
-                                              " lock for %s" %
-                                              self.path)
-                        else:
-                            raise AlreadyLocked("%s is already locked" %
-                                                self.path)
-                    time.sleep(timeout / 10 if timeout is not None else 0.1)
-            else:
-                # Link creation succeeded.  We're good to go.
-                return
-
-    def release(self):
-        if not self.is_locked():
-            raise NotLocked("%s is not locked" % self.path)
-        elif not self.i_am_locking():
-            raise NotMyLock("%s is locked, but not by me" % self.path)
-        os.unlink(self.lock_file)
-
-    def is_locked(self):
-        return os.path.islink(self.lock_file)
-
-    def i_am_locking(self):
-        return (os.path.islink(self.lock_file)
-                and os.readlink(self.lock_file) == self.unique_name)
-
-    def break_lock(self):
-        if os.path.islink(self.lock_file):  # exists && link
-            os.unlink(self.lock_file)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/msgpack/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/msgpack/__init__.py
deleted file mode 100644
index 2afca5a..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/msgpack/__init__.py
+++ /dev/null
@@ -1,66 +0,0 @@
-# coding: utf-8
-from pip._vendor.msgpack._version import version
-from pip._vendor.msgpack.exceptions import *
-
-from collections import namedtuple
-
-
-class ExtType(namedtuple('ExtType', 'code data')):
-    """ExtType represents ext type in msgpack."""
-    def __new__(cls, code, data):
-        if not isinstance(code, int):
-            raise TypeError("code must be int")
-        if not isinstance(data, bytes):
-            raise TypeError("data must be bytes")
-        if not 0 <= code <= 127:
-            raise ValueError("code must be 0~127")
-        return super(ExtType, cls).__new__(cls, code, data)
-
-
-import os
-if os.environ.get('MSGPACK_PUREPYTHON'):
-    from pip._vendor.msgpack.fallback import Packer, unpackb, Unpacker
-else:
-    try:
-        from pip._vendor.msgpack._packer import Packer
-        from pip._vendor.msgpack._unpacker import unpackb, Unpacker
-    except ImportError:
-        from pip._vendor.msgpack.fallback import Packer, unpackb, Unpacker
-
-
-def pack(o, stream, **kwargs):
-    """
-    Pack object `o` and write it to `stream`
-
-    See :class:`Packer` for options.
-    """
-    packer = Packer(**kwargs)
-    stream.write(packer.pack(o))
-
-
-def packb(o, **kwargs):
-    """
-    Pack object `o` and return packed bytes
-
-    See :class:`Packer` for options.
-    """
-    return Packer(**kwargs).pack(o)
-
-
-def unpack(stream, **kwargs):
-    """
-    Unpack an object from `stream`.
-
-    Raises `ExtraData` when `stream` contains extra bytes.
-    See :class:`Unpacker` for options.
-    """
-    data = stream.read()
-    return unpackb(data, **kwargs)
-
-
-# alias for compatibility to simplejson/marshal/pickle.
-load = unpack
-loads = unpackb
-
-dump = pack
-dumps = packb
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/msgpack/_version.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/msgpack/_version.py
deleted file mode 100644
index d28f0de..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/msgpack/_version.py
+++ /dev/null
@@ -1 +0,0 @@
-version = (0, 5, 6)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/msgpack/exceptions.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/msgpack/exceptions.py
deleted file mode 100644
index 9766881..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/msgpack/exceptions.py
+++ /dev/null
@@ -1,41 +0,0 @@
-class UnpackException(Exception):
-    """Deprecated.  Use Exception instead to catch all exception during unpacking."""
-
-
-class BufferFull(UnpackException):
-    pass
-
-
-class OutOfData(UnpackException):
-    pass
-
-
-class UnpackValueError(UnpackException, ValueError):
-    """Deprecated.  Use ValueError instead."""
-
-
-class ExtraData(UnpackValueError):
-    def __init__(self, unpacked, extra):
-        self.unpacked = unpacked
-        self.extra = extra
-
-    def __str__(self):
-        return "unpack(b) received extra data."
-
-
-class PackException(Exception):
-    """Deprecated.  Use Exception instead to catch all exception during packing."""
-
-
-class PackValueError(PackException, ValueError):
-    """PackValueError is raised when type of input data is supported but it's value is unsupported.
-
-    Deprecated.  Use ValueError instead.
-    """
-
-
-class PackOverflowError(PackValueError, OverflowError):
-    """PackOverflowError is raised when integer value is out of range of msgpack support [-2**31, 2**32).
-
-    Deprecated.  Use ValueError instead.
-    """
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/msgpack/fallback.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/msgpack/fallback.py
deleted file mode 100644
index 9418421..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/msgpack/fallback.py
+++ /dev/null
@@ -1,977 +0,0 @@
-"""Fallback pure Python implementation of msgpack"""
-
-import sys
-import struct
-import warnings
-
-if sys.version_info[0] == 3:
-    PY3 = True
-    int_types = int
-    Unicode = str
-    xrange = range
-    def dict_iteritems(d):
-        return d.items()
-else:
-    PY3 = False
-    int_types = (int, long)
-    Unicode = unicode
-    def dict_iteritems(d):
-        return d.iteritems()
-
-
-if hasattr(sys, 'pypy_version_info'):
-    # cStringIO is slow on PyPy, StringIO is faster.  However: PyPy's own
-    # StringBuilder is fastest.
-    from __pypy__ import newlist_hint
-    try:
-        from __pypy__.builders import BytesBuilder as StringBuilder
-    except ImportError:
-        from __pypy__.builders import StringBuilder
-    USING_STRINGBUILDER = True
-    class StringIO(object):
-        def __init__(self, s=b''):
-            if s:
-                self.builder = StringBuilder(len(s))
-                self.builder.append(s)
-            else:
-                self.builder = StringBuilder()
-        def write(self, s):
-            if isinstance(s, memoryview):
-                s = s.tobytes()
-            elif isinstance(s, bytearray):
-                s = bytes(s)
-            self.builder.append(s)
-        def getvalue(self):
-            return self.builder.build()
-else:
-    USING_STRINGBUILDER = False
-    from io import BytesIO as StringIO
-    newlist_hint = lambda size: []
-
-
-from pip._vendor.msgpack.exceptions import (
-    BufferFull,
-    OutOfData,
-    UnpackValueError,
-    PackValueError,
-    PackOverflowError,
-    ExtraData)
-
-from pip._vendor.msgpack import ExtType
-
-
-EX_SKIP                 = 0
-EX_CONSTRUCT            = 1
-EX_READ_ARRAY_HEADER    = 2
-EX_READ_MAP_HEADER      = 3
-
-TYPE_IMMEDIATE          = 0
-TYPE_ARRAY              = 1
-TYPE_MAP                = 2
-TYPE_RAW                = 3
-TYPE_BIN                = 4
-TYPE_EXT                = 5
-
-DEFAULT_RECURSE_LIMIT = 511
-
-
-def _check_type_strict(obj, t, type=type, tuple=tuple):
-    if type(t) is tuple:
-        return type(obj) in t
-    else:
-        return type(obj) is t
-
-
-def _get_data_from_buffer(obj):
-    try:
-        view = memoryview(obj)
-    except TypeError:
-        # try to use legacy buffer protocol if 2.7, otherwise re-raise
-        if not PY3:
-            view = memoryview(buffer(obj))
-            warnings.warn("using old buffer interface to unpack %s; "
-                          "this leads to unpacking errors if slicing is used and "
-                          "will be removed in a future version" % type(obj),
-                          RuntimeWarning)
-        else:
-            raise
-    if view.itemsize != 1:
-        raise ValueError("cannot unpack from multi-byte object")
-    return view
-
-
-def unpack(stream, **kwargs):
-    warnings.warn(
-        "Direct calling implementation's unpack() is deprecated, Use msgpack.unpack() or unpackb() instead.",
-        PendingDeprecationWarning)
-    data = stream.read()
-    return unpackb(data, **kwargs)
-
-
-def unpackb(packed, **kwargs):
-    """
-    Unpack an object from `packed`.
-
-    Raises `ExtraData` when `packed` contains extra bytes.
-    See :class:`Unpacker` for options.
-    """
-    unpacker = Unpacker(None, **kwargs)
-    unpacker.feed(packed)
-    try:
-        ret = unpacker._unpack()
-    except OutOfData:
-        raise UnpackValueError("Data is not enough.")
-    if unpacker._got_extradata():
-        raise ExtraData(ret, unpacker._get_extradata())
-    return ret
-
-
-class Unpacker(object):
-    """Streaming unpacker.
-
-    arguments:
-
-    :param file_like:
-        File-like object having `.read(n)` method.
-        If specified, unpacker reads serialized data from it and :meth:`feed()` is not usable.
-
-    :param int read_size:
-        Used as `file_like.read(read_size)`. (default: `min(16*1024, max_buffer_size)`)
-
-    :param bool use_list:
-        If true, unpack msgpack array to Python list.
-        Otherwise, unpack to Python tuple. (default: True)
-
-    :param bool raw:
-        If true, unpack msgpack raw to Python bytes (default).
-        Otherwise, unpack to Python str (or unicode on Python 2) by decoding
-        with UTF-8 encoding (recommended).
-        Currently, the default is true, but it will be changed to false in
-        near future.  So you must specify it explicitly for keeping backward
-        compatibility.
-
-        *encoding* option which is deprecated overrides this option.
-
-    :param callable object_hook:
-        When specified, it should be callable.
-        Unpacker calls it with a dict argument after unpacking msgpack map.
-        (See also simplejson)
-
-    :param callable object_pairs_hook:
-        When specified, it should be callable.
-        Unpacker calls it with a list of key-value pairs after unpacking msgpack map.
-        (See also simplejson)
-
-    :param str encoding:
-        Encoding used for decoding msgpack raw.
-        If it is None (default), msgpack raw is deserialized to Python bytes.
-
-    :param str unicode_errors:
-        (deprecated) Used for decoding msgpack raw with *encoding*.
-        (default: `'strict'`)
-
-    :param int max_buffer_size:
-        Limits size of data waiting unpacked.  0 means system's INT_MAX (default).
-        Raises `BufferFull` exception when it is insufficient.
-        You should set this parameter when unpacking data from untrusted source.
-
-    :param int max_str_len:
-        Limits max length of str. (default: 2**31-1)
-
-    :param int max_bin_len:
-        Limits max length of bin. (default: 2**31-1)
-
-    :param int max_array_len:
-        Limits max length of array. (default: 2**31-1)
-
-    :param int max_map_len:
-        Limits max length of map. (default: 2**31-1)
-
-
-    example of streaming deserialize from file-like object::
-
-        unpacker = Unpacker(file_like, raw=False)
-        for o in unpacker:
-            process(o)
-
-    example of streaming deserialize from socket::
-
-        unpacker = Unpacker(raw=False)
-        while True:
-            buf = sock.recv(1024**2)
-            if not buf:
-                break
-            unpacker.feed(buf)
-            for o in unpacker:
-                process(o)
-    """
-
-    def __init__(self, file_like=None, read_size=0, use_list=True, raw=True,
-                 object_hook=None, object_pairs_hook=None, list_hook=None,
-                 encoding=None, unicode_errors=None, max_buffer_size=0,
-                 ext_hook=ExtType,
-                 max_str_len=2147483647, # 2**32-1
-                 max_bin_len=2147483647,
-                 max_array_len=2147483647,
-                 max_map_len=2147483647,
-                 max_ext_len=2147483647):
-
-        if encoding is not None:
-            warnings.warn(
-                "encoding is deprecated, Use raw=False instead.",
-                PendingDeprecationWarning)
-
-        if unicode_errors is None:
-            unicode_errors = 'strict'
-
-        if file_like is None:
-            self._feeding = True
-        else:
-            if not callable(file_like.read):
-                raise TypeError("`file_like.read` must be callable")
-            self.file_like = file_like
-            self._feeding = False
-
-        #: array of bytes fed.
-        self._buffer = bytearray()
-        # Some very old pythons don't support `struct.unpack_from()` with a
-        # `bytearray`. So we wrap it in a `buffer()` there.
-        if sys.version_info < (2, 7, 6):
-            self._buffer_view = buffer(self._buffer)
-        else:
-            self._buffer_view = self._buffer
-        #: Which position we currently reads
-        self._buff_i = 0
-
-        # When Unpacker is used as an iterable, between the calls to next(),
-        # the buffer is not "consumed" completely, for efficiency sake.
-        # Instead, it is done sloppily.  To make sure we raise BufferFull at
-        # the correct moments, we have to keep track of how sloppy we were.
-        # Furthermore, when the buffer is incomplete (that is: in the case
-        # we raise an OutOfData) we need to rollback the buffer to the correct
-        # state, which _buf_checkpoint records.
-        self._buf_checkpoint = 0
-
-        self._max_buffer_size = max_buffer_size or 2**31-1
-        if read_size > self._max_buffer_size:
-            raise ValueError("read_size must be smaller than max_buffer_size")
-        self._read_size = read_size or min(self._max_buffer_size, 16*1024)
-        self._raw = bool(raw)
-        self._encoding = encoding
-        self._unicode_errors = unicode_errors
-        self._use_list = use_list
-        self._list_hook = list_hook
-        self._object_hook = object_hook
-        self._object_pairs_hook = object_pairs_hook
-        self._ext_hook = ext_hook
-        self._max_str_len = max_str_len
-        self._max_bin_len = max_bin_len
-        self._max_array_len = max_array_len
-        self._max_map_len = max_map_len
-        self._max_ext_len = max_ext_len
-        self._stream_offset = 0
-
-        if list_hook is not None and not callable(list_hook):
-            raise TypeError('`list_hook` is not callable')
-        if object_hook is not None and not callable(object_hook):
-            raise TypeError('`object_hook` is not callable')
-        if object_pairs_hook is not None and not callable(object_pairs_hook):
-            raise TypeError('`object_pairs_hook` is not callable')
-        if object_hook is not None and object_pairs_hook is not None:
-            raise TypeError("object_pairs_hook and object_hook are mutually "
-                            "exclusive")
-        if not callable(ext_hook):
-            raise TypeError("`ext_hook` is not callable")
-
-    def feed(self, next_bytes):
-        assert self._feeding
-        view = _get_data_from_buffer(next_bytes)
-        if (len(self._buffer) - self._buff_i + len(view) > self._max_buffer_size):
-            raise BufferFull
-
-        # Strip buffer before checkpoint before reading file.
-        if self._buf_checkpoint > 0:
-            del self._buffer[:self._buf_checkpoint]
-            self._buff_i -= self._buf_checkpoint
-            self._buf_checkpoint = 0
-
-        self._buffer += view
-
-    def _consume(self):
-        """ Gets rid of the used parts of the buffer. """
-        self._stream_offset += self._buff_i - self._buf_checkpoint
-        self._buf_checkpoint = self._buff_i
-
-    def _got_extradata(self):
-        return self._buff_i < len(self._buffer)
-
-    def _get_extradata(self):
-        return self._buffer[self._buff_i:]
-
-    def read_bytes(self, n):
-        return self._read(n)
-
-    def _read(self, n):
-        # (int) -> bytearray
-        self._reserve(n)
-        i = self._buff_i
-        self._buff_i = i+n
-        return self._buffer[i:i+n]
-
-    def _reserve(self, n):
-        remain_bytes = len(self._buffer) - self._buff_i - n
-
-        # Fast path: buffer has n bytes already
-        if remain_bytes >= 0:
-            return
-
-        if self._feeding:
-            self._buff_i = self._buf_checkpoint
-            raise OutOfData
-
-        # Strip buffer before checkpoint before reading file.
-        if self._buf_checkpoint > 0:
-            del self._buffer[:self._buf_checkpoint]
-            self._buff_i -= self._buf_checkpoint
-            self._buf_checkpoint = 0
-
-        # Read from file
-        remain_bytes = -remain_bytes
-        while remain_bytes > 0:
-            to_read_bytes = max(self._read_size, remain_bytes)
-            read_data = self.file_like.read(to_read_bytes)
-            if not read_data:
-                break
-            assert isinstance(read_data, bytes)
-            self._buffer += read_data
-            remain_bytes -= len(read_data)
-
-        if len(self._buffer) < n + self._buff_i:
-            self._buff_i = 0  # rollback
-            raise OutOfData
-
-    def _read_header(self, execute=EX_CONSTRUCT):
-        typ = TYPE_IMMEDIATE
-        n = 0
-        obj = None
-        self._reserve(1)
-        b = self._buffer[self._buff_i]
-        self._buff_i += 1
-        if b & 0b10000000 == 0:
-            obj = b
-        elif b & 0b11100000 == 0b11100000:
-            obj = -1 - (b ^ 0xff)
-        elif b & 0b11100000 == 0b10100000:
-            n = b & 0b00011111
-            typ = TYPE_RAW
-            if n > self._max_str_len:
-                raise UnpackValueError("%s exceeds max_str_len(%s)", n, self._max_str_len)
-            obj = self._read(n)
-        elif b & 0b11110000 == 0b10010000:
-            n = b & 0b00001111
-            typ = TYPE_ARRAY
-            if n > self._max_array_len:
-                raise UnpackValueError("%s exceeds max_array_len(%s)", n, self._max_array_len)
-        elif b & 0b11110000 == 0b10000000:
-            n = b & 0b00001111
-            typ = TYPE_MAP
-            if n > self._max_map_len:
-                raise UnpackValueError("%s exceeds max_map_len(%s)", n, self._max_map_len)
-        elif b == 0xc0:
-            obj = None
-        elif b == 0xc2:
-            obj = False
-        elif b == 0xc3:
-            obj = True
-        elif b == 0xc4:
-            typ = TYPE_BIN
-            self._reserve(1)
-            n = self._buffer[self._buff_i]
-            self._buff_i += 1
-            if n > self._max_bin_len:
-                raise UnpackValueError("%s exceeds max_bin_len(%s)" % (n, self._max_bin_len))
-            obj = self._read(n)
-        elif b == 0xc5:
-            typ = TYPE_BIN
-            self._reserve(2)
-            n = struct.unpack_from(">H", self._buffer_view, self._buff_i)[0]
-            self._buff_i += 2
-            if n > self._max_bin_len:
-                raise UnpackValueError("%s exceeds max_bin_len(%s)" % (n, self._max_bin_len))
-            obj = self._read(n)
-        elif b == 0xc6:
-            typ = TYPE_BIN
-            self._reserve(4)
-            n = struct.unpack_from(">I", self._buffer_view, self._buff_i)[0]
-            self._buff_i += 4
-            if n > self._max_bin_len:
-                raise UnpackValueError("%s exceeds max_bin_len(%s)" % (n, self._max_bin_len))
-            obj = self._read(n)
-        elif b == 0xc7:  # ext 8
-            typ = TYPE_EXT
-            self._reserve(2)
-            L, n = struct.unpack_from('Bb', self._buffer_view, self._buff_i)
-            self._buff_i += 2
-            if L > self._max_ext_len:
-                raise UnpackValueError("%s exceeds max_ext_len(%s)" % (L, self._max_ext_len))
-            obj = self._read(L)
-        elif b == 0xc8:  # ext 16
-            typ = TYPE_EXT
-            self._reserve(3)
-            L, n = struct.unpack_from('>Hb', self._buffer_view, self._buff_i)
-            self._buff_i += 3
-            if L > self._max_ext_len:
-                raise UnpackValueError("%s exceeds max_ext_len(%s)" % (L, self._max_ext_len))
-            obj = self._read(L)
-        elif b == 0xc9:  # ext 32
-            typ = TYPE_EXT
-            self._reserve(5)
-            L, n = struct.unpack_from('>Ib', self._buffer_view, self._buff_i)
-            self._buff_i += 5
-            if L > self._max_ext_len:
-                raise UnpackValueError("%s exceeds max_ext_len(%s)" % (L, self._max_ext_len))
-            obj = self._read(L)
-        elif b == 0xca:
-            self._reserve(4)
-            obj = struct.unpack_from(">f", self._buffer_view, self._buff_i)[0]
-            self._buff_i += 4
-        elif b == 0xcb:
-            self._reserve(8)
-            obj = struct.unpack_from(">d", self._buffer_view, self._buff_i)[0]
-            self._buff_i += 8
-        elif b == 0xcc:
-            self._reserve(1)
-            obj = self._buffer[self._buff_i]
-            self._buff_i += 1
-        elif b == 0xcd:
-            self._reserve(2)
-            obj = struct.unpack_from(">H", self._buffer_view, self._buff_i)[0]
-            self._buff_i += 2
-        elif b == 0xce:
-            self._reserve(4)
-            obj = struct.unpack_from(">I", self._buffer_view, self._buff_i)[0]
-            self._buff_i += 4
-        elif b == 0xcf:
-            self._reserve(8)
-            obj = struct.unpack_from(">Q", self._buffer_view, self._buff_i)[0]
-            self._buff_i += 8
-        elif b == 0xd0:
-            self._reserve(1)
-            obj = struct.unpack_from("b", self._buffer_view, self._buff_i)[0]
-            self._buff_i += 1
-        elif b == 0xd1:
-            self._reserve(2)
-            obj = struct.unpack_from(">h", self._buffer_view, self._buff_i)[0]
-            self._buff_i += 2
-        elif b == 0xd2:
-            self._reserve(4)
-            obj = struct.unpack_from(">i", self._buffer_view, self._buff_i)[0]
-            self._buff_i += 4
-        elif b == 0xd3:
-            self._reserve(8)
-            obj = struct.unpack_from(">q", self._buffer_view, self._buff_i)[0]
-            self._buff_i += 8
-        elif b == 0xd4:  # fixext 1
-            typ = TYPE_EXT
-            if self._max_ext_len < 1:
-                raise UnpackValueError("%s exceeds max_ext_len(%s)" % (1, self._max_ext_len))
-            self._reserve(2)
-            n, obj = struct.unpack_from("b1s", self._buffer_view, self._buff_i)
-            self._buff_i += 2
-        elif b == 0xd5:  # fixext 2
-            typ = TYPE_EXT
-            if self._max_ext_len < 2:
-                raise UnpackValueError("%s exceeds max_ext_len(%s)" % (2, self._max_ext_len))
-            self._reserve(3)
-            n, obj = struct.unpack_from("b2s", self._buffer_view, self._buff_i)
-            self._buff_i += 3
-        elif b == 0xd6:  # fixext 4
-            typ = TYPE_EXT
-            if self._max_ext_len < 4:
-                raise UnpackValueError("%s exceeds max_ext_len(%s)" % (4, self._max_ext_len))
-            self._reserve(5)
-            n, obj = struct.unpack_from("b4s", self._buffer_view, self._buff_i)
-            self._buff_i += 5
-        elif b == 0xd7:  # fixext 8
-            typ = TYPE_EXT
-            if self._max_ext_len < 8:
-                raise UnpackValueError("%s exceeds max_ext_len(%s)" % (8, self._max_ext_len))
-            self._reserve(9)
-            n, obj = struct.unpack_from("b8s", self._buffer_view, self._buff_i)
-            self._buff_i += 9
-        elif b == 0xd8:  # fixext 16
-            typ = TYPE_EXT
-            if self._max_ext_len < 16:
-                raise UnpackValueError("%s exceeds max_ext_len(%s)" % (16, self._max_ext_len))
-            self._reserve(17)
-            n, obj = struct.unpack_from("b16s", self._buffer_view, self._buff_i)
-            self._buff_i += 17
-        elif b == 0xd9:
-            typ = TYPE_RAW
-            self._reserve(1)
-            n = self._buffer[self._buff_i]
-            self._buff_i += 1
-            if n > self._max_str_len:
-                raise UnpackValueError("%s exceeds max_str_len(%s)", n, self._max_str_len)
-            obj = self._read(n)
-        elif b == 0xda:
-            typ = TYPE_RAW
-            self._reserve(2)
-            n, = struct.unpack_from(">H", self._buffer_view, self._buff_i)
-            self._buff_i += 2
-            if n > self._max_str_len:
-                raise UnpackValueError("%s exceeds max_str_len(%s)", n, self._max_str_len)
-            obj = self._read(n)
-        elif b == 0xdb:
-            typ = TYPE_RAW
-            self._reserve(4)
-            n, = struct.unpack_from(">I", self._buffer_view, self._buff_i)
-            self._buff_i += 4
-            if n > self._max_str_len:
-                raise UnpackValueError("%s exceeds max_str_len(%s)", n, self._max_str_len)
-            obj = self._read(n)
-        elif b == 0xdc:
-            typ = TYPE_ARRAY
-            self._reserve(2)
-            n, = struct.unpack_from(">H", self._buffer_view, self._buff_i)
-            self._buff_i += 2
-            if n > self._max_array_len:
-                raise UnpackValueError("%s exceeds max_array_len(%s)", n, self._max_array_len)
-        elif b == 0xdd:
-            typ = TYPE_ARRAY
-            self._reserve(4)
-            n, = struct.unpack_from(">I", self._buffer_view, self._buff_i)
-            self._buff_i += 4
-            if n > self._max_array_len:
-                raise UnpackValueError("%s exceeds max_array_len(%s)", n, self._max_array_len)
-        elif b == 0xde:
-            self._reserve(2)
-            n, = struct.unpack_from(">H", self._buffer_view, self._buff_i)
-            self._buff_i += 2
-            if n > self._max_map_len:
-                raise UnpackValueError("%s exceeds max_map_len(%s)", n, self._max_map_len)
-            typ = TYPE_MAP
-        elif b == 0xdf:
-            self._reserve(4)
-            n, = struct.unpack_from(">I", self._buffer_view, self._buff_i)
-            self._buff_i += 4
-            if n > self._max_map_len:
-                raise UnpackValueError("%s exceeds max_map_len(%s)", n, self._max_map_len)
-            typ = TYPE_MAP
-        else:
-            raise UnpackValueError("Unknown header: 0x%x" % b)
-        return typ, n, obj
-
-    def _unpack(self, execute=EX_CONSTRUCT):
-        typ, n, obj = self._read_header(execute)
-
-        if execute == EX_READ_ARRAY_HEADER:
-            if typ != TYPE_ARRAY:
-                raise UnpackValueError("Expected array")
-            return n
-        if execute == EX_READ_MAP_HEADER:
-            if typ != TYPE_MAP:
-                raise UnpackValueError("Expected map")
-            return n
-        # TODO should we eliminate the recursion?
-        if typ == TYPE_ARRAY:
-            if execute == EX_SKIP:
-                for i in xrange(n):
-                    # TODO check whether we need to call `list_hook`
-                    self._unpack(EX_SKIP)
-                return
-            ret = newlist_hint(n)
-            for i in xrange(n):
-                ret.append(self._unpack(EX_CONSTRUCT))
-            if self._list_hook is not None:
-                ret = self._list_hook(ret)
-            # TODO is the interaction between `list_hook` and `use_list` ok?
-            return ret if self._use_list else tuple(ret)
-        if typ == TYPE_MAP:
-            if execute == EX_SKIP:
-                for i in xrange(n):
-                    # TODO check whether we need to call hooks
-                    self._unpack(EX_SKIP)
-                    self._unpack(EX_SKIP)
-                return
-            if self._object_pairs_hook is not None:
-                ret = self._object_pairs_hook(
-                    (self._unpack(EX_CONSTRUCT),
-                     self._unpack(EX_CONSTRUCT))
-                    for _ in xrange(n))
-            else:
-                ret = {}
-                for _ in xrange(n):
-                    key = self._unpack(EX_CONSTRUCT)
-                    ret[key] = self._unpack(EX_CONSTRUCT)
-                if self._object_hook is not None:
-                    ret = self._object_hook(ret)
-            return ret
-        if execute == EX_SKIP:
-            return
-        if typ == TYPE_RAW:
-            if self._encoding is not None:
-                obj = obj.decode(self._encoding, self._unicode_errors)
-            elif self._raw:
-                obj = bytes(obj)
-            else:
-                obj = obj.decode('utf_8')
-            return obj
-        if typ == TYPE_EXT:
-            return self._ext_hook(n, bytes(obj))
-        if typ == TYPE_BIN:
-            return bytes(obj)
-        assert typ == TYPE_IMMEDIATE
-        return obj
-
-    def __iter__(self):
-        return self
-
-    def __next__(self):
-        try:
-            ret = self._unpack(EX_CONSTRUCT)
-            self._consume()
-            return ret
-        except OutOfData:
-            self._consume()
-            raise StopIteration
-
-    next = __next__
-
-    def skip(self, write_bytes=None):
-        self._unpack(EX_SKIP)
-        if write_bytes is not None:
-            warnings.warn("`write_bytes` option is deprecated.  Use `.tell()` instead.", DeprecationWarning)
-            write_bytes(self._buffer[self._buf_checkpoint:self._buff_i])
-        self._consume()
-
-    def unpack(self, write_bytes=None):
-        ret = self._unpack(EX_CONSTRUCT)
-        if write_bytes is not None:
-            warnings.warn("`write_bytes` option is deprecated.  Use `.tell()` instead.", DeprecationWarning)
-            write_bytes(self._buffer[self._buf_checkpoint:self._buff_i])
-        self._consume()
-        return ret
-
-    def read_array_header(self, write_bytes=None):
-        ret = self._unpack(EX_READ_ARRAY_HEADER)
-        if write_bytes is not None:
-            warnings.warn("`write_bytes` option is deprecated.  Use `.tell()` instead.", DeprecationWarning)
-            write_bytes(self._buffer[self._buf_checkpoint:self._buff_i])
-        self._consume()
-        return ret
-
-    def read_map_header(self, write_bytes=None):
-        ret = self._unpack(EX_READ_MAP_HEADER)
-        if write_bytes is not None:
-            warnings.warn("`write_bytes` option is deprecated.  Use `.tell()` instead.", DeprecationWarning)
-            write_bytes(self._buffer[self._buf_checkpoint:self._buff_i])
-        self._consume()
-        return ret
-
-    def tell(self):
-        return self._stream_offset
-
-
-class Packer(object):
-    """
-    MessagePack Packer
-
-    usage:
-
-        packer = Packer()
-        astream.write(packer.pack(a))
-        astream.write(packer.pack(b))
-
-    Packer's constructor has some keyword arguments:
-
-    :param callable default:
-        Convert user type to builtin type that Packer supports.
-        See also simplejson's document.
-
-    :param bool use_single_float:
-        Use single precision float type for float. (default: False)
-
-    :param bool autoreset:
-        Reset buffer after each pack and return its content as `bytes`. (default: True).
-        If set this to false, use `bytes()` to get content and `.reset()` to clear buffer.
-
-    :param bool use_bin_type:
-        Use bin type introduced in msgpack spec 2.0 for bytes.
-        It also enables str8 type for unicode.
-
-    :param bool strict_types:
-        If set to true, types will be checked to be exact. Derived classes
-        from serializeable types will not be serialized and will be
-        treated as unsupported type and forwarded to default.
-        Additionally tuples will not be serialized as lists.
-        This is useful when trying to implement accurate serialization
-        for python types.
-
-    :param str encoding:
-        (deprecated) Convert unicode to bytes with this encoding. (default: 'utf-8')
-
-    :param str unicode_errors:
-        Error handler for encoding unicode. (default: 'strict')
-    """
-    def __init__(self, default=None, encoding=None, unicode_errors=None,
-                 use_single_float=False, autoreset=True, use_bin_type=False,
-                 strict_types=False):
-        if encoding is None:
-            encoding = 'utf_8'
-        else:
-            warnings.warn(
-                "encoding is deprecated, Use raw=False instead.",
-                PendingDeprecationWarning)
-
-        if unicode_errors is None:
-            unicode_errors = 'strict'
-
-        self._strict_types = strict_types
-        self._use_float = use_single_float
-        self._autoreset = autoreset
-        self._use_bin_type = use_bin_type
-        self._encoding = encoding
-        self._unicode_errors = unicode_errors
-        self._buffer = StringIO()
-        if default is not None:
-            if not callable(default):
-                raise TypeError("default must be callable")
-        self._default = default
-
-    def _pack(self, obj, nest_limit=DEFAULT_RECURSE_LIMIT,
-              check=isinstance, check_type_strict=_check_type_strict):
-        default_used = False
-        if self._strict_types:
-            check = check_type_strict
-            list_types = list
-        else:
-            list_types = (list, tuple)
-        while True:
-            if nest_limit < 0:
-                raise PackValueError("recursion limit exceeded")
-            if obj is None:
-                return self._buffer.write(b"\xc0")
-            if check(obj, bool):
-                if obj:
-                    return self._buffer.write(b"\xc3")
-                return self._buffer.write(b"\xc2")
-            if check(obj, int_types):
-                if 0 <= obj < 0x80:
-                    return self._buffer.write(struct.pack("B", obj))
-                if -0x20 <= obj < 0:
-                    return self._buffer.write(struct.pack("b", obj))
-                if 0x80 <= obj <= 0xff:
-                    return self._buffer.write(struct.pack("BB", 0xcc, obj))
-                if -0x80 <= obj < 0:
-                    return self._buffer.write(struct.pack(">Bb", 0xd0, obj))
-                if 0xff < obj <= 0xffff:
-                    return self._buffer.write(struct.pack(">BH", 0xcd, obj))
-                if -0x8000 <= obj < -0x80:
-                    return self._buffer.write(struct.pack(">Bh", 0xd1, obj))
-                if 0xffff < obj <= 0xffffffff:
-                    return self._buffer.write(struct.pack(">BI", 0xce, obj))
-                if -0x80000000 <= obj < -0x8000:
-                    return self._buffer.write(struct.pack(">Bi", 0xd2, obj))
-                if 0xffffffff < obj <= 0xffffffffffffffff:
-                    return self._buffer.write(struct.pack(">BQ", 0xcf, obj))
-                if -0x8000000000000000 <= obj < -0x80000000:
-                    return self._buffer.write(struct.pack(">Bq", 0xd3, obj))
-                if not default_used and self._default is not None:
-                    obj = self._default(obj)
-                    default_used = True
-                    continue
-                raise PackOverflowError("Integer value out of range")
-            if check(obj, (bytes, bytearray)):
-                n = len(obj)
-                if n >= 2**32:
-                    raise PackValueError("%s is too large" % type(obj).__name__)
-                self._pack_bin_header(n)
-                return self._buffer.write(obj)
-            if check(obj, Unicode):
-                if self._encoding is None:
-                    raise TypeError(
-                        "Can't encode unicode string: "
-                        "no encoding is specified")
-                obj = obj.encode(self._encoding, self._unicode_errors)
-                n = len(obj)
-                if n >= 2**32:
-                    raise PackValueError("String is too large")
-                self._pack_raw_header(n)
-                return self._buffer.write(obj)
-            if check(obj, memoryview):
-                n = len(obj) * obj.itemsize
-                if n >= 2**32:
-                    raise PackValueError("Memoryview is too large")
-                self._pack_bin_header(n)
-                return self._buffer.write(obj)
-            if check(obj, float):
-                if self._use_float:
-                    return self._buffer.write(struct.pack(">Bf", 0xca, obj))
-                return self._buffer.write(struct.pack(">Bd", 0xcb, obj))
-            if check(obj, ExtType):
-                code = obj.code
-                data = obj.data
-                assert isinstance(code, int)
-                assert isinstance(data, bytes)
-                L = len(data)
-                if L == 1:
-                    self._buffer.write(b'\xd4')
-                elif L == 2:
-                    self._buffer.write(b'\xd5')
-                elif L == 4:
-                    self._buffer.write(b'\xd6')
-                elif L == 8:
-                    self._buffer.write(b'\xd7')
-                elif L == 16:
-                    self._buffer.write(b'\xd8')
-                elif L <= 0xff:
-                    self._buffer.write(struct.pack(">BB", 0xc7, L))
-                elif L <= 0xffff:
-                    self._buffer.write(struct.pack(">BH", 0xc8, L))
-                else:
-                    self._buffer.write(struct.pack(">BI", 0xc9, L))
-                self._buffer.write(struct.pack("b", code))
-                self._buffer.write(data)
-                return
-            if check(obj, list_types):
-                n = len(obj)
-                self._pack_array_header(n)
-                for i in xrange(n):
-                    self._pack(obj[i], nest_limit - 1)
-                return
-            if check(obj, dict):
-                return self._pack_map_pairs(len(obj), dict_iteritems(obj),
-                                               nest_limit - 1)
-            if not default_used and self._default is not None:
-                obj = self._default(obj)
-                default_used = 1
-                continue
-            raise TypeError("Cannot serialize %r" % (obj, ))
-
-    def pack(self, obj):
-        try:
-            self._pack(obj)
-        except:
-            self._buffer = StringIO()  # force reset
-            raise
-        ret = self._buffer.getvalue()
-        if self._autoreset:
-            self._buffer = StringIO()
-        elif USING_STRINGBUILDER:
-            self._buffer = StringIO(ret)
-        return ret
-
-    def pack_map_pairs(self, pairs):
-        self._pack_map_pairs(len(pairs), pairs)
-        ret = self._buffer.getvalue()
-        if self._autoreset:
-            self._buffer = StringIO()
-        elif USING_STRINGBUILDER:
-            self._buffer = StringIO(ret)
-        return ret
-
-    def pack_array_header(self, n):
-        if n >= 2**32:
-            raise PackValueError
-        self._pack_array_header(n)
-        ret = self._buffer.getvalue()
-        if self._autoreset:
-            self._buffer = StringIO()
-        elif USING_STRINGBUILDER:
-            self._buffer = StringIO(ret)
-        return ret
-
-    def pack_map_header(self, n):
-        if n >= 2**32:
-            raise PackValueError
-        self._pack_map_header(n)
-        ret = self._buffer.getvalue()
-        if self._autoreset:
-            self._buffer = StringIO()
-        elif USING_STRINGBUILDER:
-            self._buffer = StringIO(ret)
-        return ret
-
-    def pack_ext_type(self, typecode, data):
-        if not isinstance(typecode, int):
-            raise TypeError("typecode must have int type.")
-        if not 0 <= typecode <= 127:
-            raise ValueError("typecode should be 0-127")
-        if not isinstance(data, bytes):
-            raise TypeError("data must have bytes type")
-        L = len(data)
-        if L > 0xffffffff:
-            raise PackValueError("Too large data")
-        if L == 1:
-            self._buffer.write(b'\xd4')
-        elif L == 2:
-            self._buffer.write(b'\xd5')
-        elif L == 4:
-            self._buffer.write(b'\xd6')
-        elif L == 8:
-            self._buffer.write(b'\xd7')
-        elif L == 16:
-            self._buffer.write(b'\xd8')
-        elif L <= 0xff:
-            self._buffer.write(b'\xc7' + struct.pack('B', L))
-        elif L <= 0xffff:
-            self._buffer.write(b'\xc8' + struct.pack('>H', L))
-        else:
-            self._buffer.write(b'\xc9' + struct.pack('>I', L))
-        self._buffer.write(struct.pack('B', typecode))
-        self._buffer.write(data)
-
-    def _pack_array_header(self, n):
-        if n <= 0x0f:
-            return self._buffer.write(struct.pack('B', 0x90 + n))
-        if n <= 0xffff:
-            return self._buffer.write(struct.pack(">BH", 0xdc, n))
-        if n <= 0xffffffff:
-            return self._buffer.write(struct.pack(">BI", 0xdd, n))
-        raise PackValueError("Array is too large")
-
-    def _pack_map_header(self, n):
-        if n <= 0x0f:
-            return self._buffer.write(struct.pack('B', 0x80 + n))
-        if n <= 0xffff:
-            return self._buffer.write(struct.pack(">BH", 0xde, n))
-        if n <= 0xffffffff:
-            return self._buffer.write(struct.pack(">BI", 0xdf, n))
-        raise PackValueError("Dict is too large")
-
-    def _pack_map_pairs(self, n, pairs, nest_limit=DEFAULT_RECURSE_LIMIT):
-        self._pack_map_header(n)
-        for (k, v) in pairs:
-            self._pack(k, nest_limit - 1)
-            self._pack(v, nest_limit - 1)
-
-    def _pack_raw_header(self, n):
-        if n <= 0x1f:
-            self._buffer.write(struct.pack('B', 0xa0 + n))
-        elif self._use_bin_type and n <= 0xff:
-            self._buffer.write(struct.pack('>BB', 0xd9, n))
-        elif n <= 0xffff:
-            self._buffer.write(struct.pack(">BH", 0xda, n))
-        elif n <= 0xffffffff:
-            self._buffer.write(struct.pack(">BI", 0xdb, n))
-        else:
-            raise PackValueError('Raw is too large')
-
-    def _pack_bin_header(self, n):
-        if not self._use_bin_type:
-            return self._pack_raw_header(n)
-        elif n <= 0xff:
-            return self._buffer.write(struct.pack('>BB', 0xc4, n))
-        elif n <= 0xffff:
-            return self._buffer.write(struct.pack(">BH", 0xc5, n))
-        elif n <= 0xffffffff:
-            return self._buffer.write(struct.pack(">BI", 0xc6, n))
-        else:
-            raise PackValueError('Bin is too large')
-
-    def bytes(self):
-        return self._buffer.getvalue()
-
-    def reset(self):
-        self._buffer = StringIO()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/packaging/__about__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/packaging/__about__.py
deleted file mode 100644
index 7481c9e..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/packaging/__about__.py
+++ /dev/null
@@ -1,27 +0,0 @@
-# This file is dual licensed under the terms of the Apache License, Version
-# 2.0, and the BSD License. See the LICENSE file in the root of this repository
-# for complete details.
-from __future__ import absolute_import, division, print_function
-
-__all__ = [
-    "__title__",
-    "__summary__",
-    "__uri__",
-    "__version__",
-    "__author__",
-    "__email__",
-    "__license__",
-    "__copyright__",
-]
-
-__title__ = "packaging"
-__summary__ = "Core utilities for Python packages"
-__uri__ = "https://github.com/pypa/packaging"
-
-__version__ = "19.0"
-
-__author__ = "Donald Stufft and individual contributors"
-__email__ = "donald@stufft.io"
-
-__license__ = "BSD or Apache License, Version 2.0"
-__copyright__ = "Copyright 2014-2019 %s" % __author__
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/packaging/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/packaging/__init__.py
deleted file mode 100644
index a0cf67d..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/packaging/__init__.py
+++ /dev/null
@@ -1,26 +0,0 @@
-# This file is dual licensed under the terms of the Apache License, Version
-# 2.0, and the BSD License. See the LICENSE file in the root of this repository
-# for complete details.
-from __future__ import absolute_import, division, print_function
-
-from .__about__ import (
-    __author__,
-    __copyright__,
-    __email__,
-    __license__,
-    __summary__,
-    __title__,
-    __uri__,
-    __version__,
-)
-
-__all__ = [
-    "__title__",
-    "__summary__",
-    "__uri__",
-    "__version__",
-    "__author__",
-    "__email__",
-    "__license__",
-    "__copyright__",
-]
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/packaging/_compat.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/packaging/_compat.py
deleted file mode 100644
index 25da473..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/packaging/_compat.py
+++ /dev/null
@@ -1,31 +0,0 @@
-# This file is dual licensed under the terms of the Apache License, Version
-# 2.0, and the BSD License. See the LICENSE file in the root of this repository
-# for complete details.
-from __future__ import absolute_import, division, print_function
-
-import sys
-
-
-PY2 = sys.version_info[0] == 2
-PY3 = sys.version_info[0] == 3
-
-# flake8: noqa
-
-if PY3:
-    string_types = (str,)
-else:
-    string_types = (basestring,)
-
-
-def with_metaclass(meta, *bases):
-    """
-    Create a base class with a metaclass.
-    """
-    # This requires a bit of explanation: the basic idea is to make a dummy
-    # metaclass for one level of class instantiation that replaces itself with
-    # the actual metaclass.
-    class metaclass(meta):
-        def __new__(cls, name, this_bases, d):
-            return meta(name, bases, d)
-
-    return type.__new__(metaclass, "temporary_class", (), {})
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/packaging/_structures.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/packaging/_structures.py
deleted file mode 100644
index 68dcca6..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/packaging/_structures.py
+++ /dev/null
@@ -1,68 +0,0 @@
-# This file is dual licensed under the terms of the Apache License, Version
-# 2.0, and the BSD License. See the LICENSE file in the root of this repository
-# for complete details.
-from __future__ import absolute_import, division, print_function
-
-
-class Infinity(object):
-    def __repr__(self):
-        return "Infinity"
-
-    def __hash__(self):
-        return hash(repr(self))
-
-    def __lt__(self, other):
-        return False
-
-    def __le__(self, other):
-        return False
-
-    def __eq__(self, other):
-        return isinstance(other, self.__class__)
-
-    def __ne__(self, other):
-        return not isinstance(other, self.__class__)
-
-    def __gt__(self, other):
-        return True
-
-    def __ge__(self, other):
-        return True
-
-    def __neg__(self):
-        return NegativeInfinity
-
-
-Infinity = Infinity()
-
-
-class NegativeInfinity(object):
-    def __repr__(self):
-        return "-Infinity"
-
-    def __hash__(self):
-        return hash(repr(self))
-
-    def __lt__(self, other):
-        return True
-
-    def __le__(self, other):
-        return True
-
-    def __eq__(self, other):
-        return isinstance(other, self.__class__)
-
-    def __ne__(self, other):
-        return not isinstance(other, self.__class__)
-
-    def __gt__(self, other):
-        return False
-
-    def __ge__(self, other):
-        return False
-
-    def __neg__(self):
-        return Infinity
-
-
-NegativeInfinity = NegativeInfinity()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/packaging/markers.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/packaging/markers.py
deleted file mode 100644
index 5482476..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/packaging/markers.py
+++ /dev/null
@@ -1,296 +0,0 @@
-# This file is dual licensed under the terms of the Apache License, Version
-# 2.0, and the BSD License. See the LICENSE file in the root of this repository
-# for complete details.
-from __future__ import absolute_import, division, print_function
-
-import operator
-import os
-import platform
-import sys
-
-from pip._vendor.pyparsing import ParseException, ParseResults, stringStart, stringEnd
-from pip._vendor.pyparsing import ZeroOrMore, Group, Forward, QuotedString
-from pip._vendor.pyparsing import Literal as L  # noqa
-
-from ._compat import string_types
-from .specifiers import Specifier, InvalidSpecifier
-
-
-__all__ = [
-    "InvalidMarker",
-    "UndefinedComparison",
-    "UndefinedEnvironmentName",
-    "Marker",
-    "default_environment",
-]
-
-
-class InvalidMarker(ValueError):
-    """
-    An invalid marker was found, users should refer to PEP 508.
-    """
-
-
-class UndefinedComparison(ValueError):
-    """
-    An invalid operation was attempted on a value that doesn't support it.
-    """
-
-
-class UndefinedEnvironmentName(ValueError):
-    """
-    A name was attempted to be used that does not exist inside of the
-    environment.
-    """
-
-
-class Node(object):
-    def __init__(self, value):
-        self.value = value
-
-    def __str__(self):
-        return str(self.value)
-
-    def __repr__(self):
-        return "<{0}({1!r})>".format(self.__class__.__name__, str(self))
-
-    def serialize(self):
-        raise NotImplementedError
-
-
-class Variable(Node):
-    def serialize(self):
-        return str(self)
-
-
-class Value(Node):
-    def serialize(self):
-        return '"{0}"'.format(self)
-
-
-class Op(Node):
-    def serialize(self):
-        return str(self)
-
-
-VARIABLE = (
-    L("implementation_version")
-    | L("platform_python_implementation")
-    | L("implementation_name")
-    | L("python_full_version")
-    | L("platform_release")
-    | L("platform_version")
-    | L("platform_machine")
-    | L("platform_system")
-    | L("python_version")
-    | L("sys_platform")
-    | L("os_name")
-    | L("os.name")
-    | L("sys.platform")  # PEP-345
-    | L("platform.version")  # PEP-345
-    | L("platform.machine")  # PEP-345
-    | L("platform.python_implementation")  # PEP-345
-    | L("python_implementation")  # PEP-345
-    | L("extra")  # undocumented setuptools legacy
-)
-ALIASES = {
-    "os.name": "os_name",
-    "sys.platform": "sys_platform",
-    "platform.version": "platform_version",
-    "platform.machine": "platform_machine",
-    "platform.python_implementation": "platform_python_implementation",
-    "python_implementation": "platform_python_implementation",
-}
-VARIABLE.setParseAction(lambda s, l, t: Variable(ALIASES.get(t[0], t[0])))
-
-VERSION_CMP = (
-    L("===") | L("==") | L(">=") | L("<=") | L("!=") | L("~=") | L(">") | L("<")
-)
-
-MARKER_OP = VERSION_CMP | L("not in") | L("in")
-MARKER_OP.setParseAction(lambda s, l, t: Op(t[0]))
-
-MARKER_VALUE = QuotedString("'") | QuotedString('"')
-MARKER_VALUE.setParseAction(lambda s, l, t: Value(t[0]))
-
-BOOLOP = L("and") | L("or")
-
-MARKER_VAR = VARIABLE | MARKER_VALUE
-
-MARKER_ITEM = Group(MARKER_VAR + MARKER_OP + MARKER_VAR)
-MARKER_ITEM.setParseAction(lambda s, l, t: tuple(t[0]))
-
-LPAREN = L("(").suppress()
-RPAREN = L(")").suppress()
-
-MARKER_EXPR = Forward()
-MARKER_ATOM = MARKER_ITEM | Group(LPAREN + MARKER_EXPR + RPAREN)
-MARKER_EXPR << MARKER_ATOM + ZeroOrMore(BOOLOP + MARKER_EXPR)
-
-MARKER = stringStart + MARKER_EXPR + stringEnd
-
-
-def _coerce_parse_result(results):
-    if isinstance(results, ParseResults):
-        return [_coerce_parse_result(i) for i in results]
-    else:
-        return results
-
-
-def _format_marker(marker, first=True):
-    assert isinstance(marker, (list, tuple, string_types))
-
-    # Sometimes we have a structure like [[...]] which is a single item list
-    # where the single item is itself it's own list. In that case we want skip
-    # the rest of this function so that we don't get extraneous () on the
-    # outside.
-    if (
-        isinstance(marker, list)
-        and len(marker) == 1
-        and isinstance(marker[0], (list, tuple))
-    ):
-        return _format_marker(marker[0])
-
-    if isinstance(marker, list):
-        inner = (_format_marker(m, first=False) for m in marker)
-        if first:
-            return " ".join(inner)
-        else:
-            return "(" + " ".join(inner) + ")"
-    elif isinstance(marker, tuple):
-        return " ".join([m.serialize() for m in marker])
-    else:
-        return marker
-
-
-_operators = {
-    "in": lambda lhs, rhs: lhs in rhs,
-    "not in": lambda lhs, rhs: lhs not in rhs,
-    "<": operator.lt,
-    "<=": operator.le,
-    "==": operator.eq,
-    "!=": operator.ne,
-    ">=": operator.ge,
-    ">": operator.gt,
-}
-
-
-def _eval_op(lhs, op, rhs):
-    try:
-        spec = Specifier("".join([op.serialize(), rhs]))
-    except InvalidSpecifier:
-        pass
-    else:
-        return spec.contains(lhs)
-
-    oper = _operators.get(op.serialize())
-    if oper is None:
-        raise UndefinedComparison(
-            "Undefined {0!r} on {1!r} and {2!r}.".format(op, lhs, rhs)
-        )
-
-    return oper(lhs, rhs)
-
-
-_undefined = object()
-
-
-def _get_env(environment, name):
-    value = environment.get(name, _undefined)
-
-    if value is _undefined:
-        raise UndefinedEnvironmentName(
-            "{0!r} does not exist in evaluation environment.".format(name)
-        )
-
-    return value
-
-
-def _evaluate_markers(markers, environment):
-    groups = [[]]
-
-    for marker in markers:
-        assert isinstance(marker, (list, tuple, string_types))
-
-        if isinstance(marker, list):
-            groups[-1].append(_evaluate_markers(marker, environment))
-        elif isinstance(marker, tuple):
-            lhs, op, rhs = marker
-
-            if isinstance(lhs, Variable):
-                lhs_value = _get_env(environment, lhs.value)
-                rhs_value = rhs.value
-            else:
-                lhs_value = lhs.value
-                rhs_value = _get_env(environment, rhs.value)
-
-            groups[-1].append(_eval_op(lhs_value, op, rhs_value))
-        else:
-            assert marker in ["and", "or"]
-            if marker == "or":
-                groups.append([])
-
-    return any(all(item) for item in groups)
-
-
-def format_full_version(info):
-    version = "{0.major}.{0.minor}.{0.micro}".format(info)
-    kind = info.releaselevel
-    if kind != "final":
-        version += kind[0] + str(info.serial)
-    return version
-
-
-def default_environment():
-    if hasattr(sys, "implementation"):
-        iver = format_full_version(sys.implementation.version)
-        implementation_name = sys.implementation.name
-    else:
-        iver = "0"
-        implementation_name = ""
-
-    return {
-        "implementation_name": implementation_name,
-        "implementation_version": iver,
-        "os_name": os.name,
-        "platform_machine": platform.machine(),
-        "platform_release": platform.release(),
-        "platform_system": platform.system(),
-        "platform_version": platform.version(),
-        "python_full_version": platform.python_version(),
-        "platform_python_implementation": platform.python_implementation(),
-        "python_version": platform.python_version()[:3],
-        "sys_platform": sys.platform,
-    }
-
-
-class Marker(object):
-    def __init__(self, marker):
-        try:
-            self._markers = _coerce_parse_result(MARKER.parseString(marker))
-        except ParseException as e:
-            err_str = "Invalid marker: {0!r}, parse error at {1!r}".format(
-                marker, marker[e.loc : e.loc + 8]
-            )
-            raise InvalidMarker(err_str)
-
-    def __str__(self):
-        return _format_marker(self._markers)
-
-    def __repr__(self):
-        return "<Marker({0!r})>".format(str(self))
-
-    def evaluate(self, environment=None):
-        """Evaluate a marker.
-
-        Return the boolean from evaluating the given marker against the
-        environment. environment is an optional argument to override all or
-        part of the determined environment.
-
-        The environment is determined from the current Python process.
-        """
-        current_environment = default_environment()
-        if environment is not None:
-            current_environment.update(environment)
-
-        return _evaluate_markers(self._markers, current_environment)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/packaging/requirements.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/packaging/requirements.py
deleted file mode 100644
index dbc5f11..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/packaging/requirements.py
+++ /dev/null
@@ -1,138 +0,0 @@
-# This file is dual licensed under the terms of the Apache License, Version
-# 2.0, and the BSD License. See the LICENSE file in the root of this repository
-# for complete details.
-from __future__ import absolute_import, division, print_function
-
-import string
-import re
-
-from pip._vendor.pyparsing import stringStart, stringEnd, originalTextFor, ParseException
-from pip._vendor.pyparsing import ZeroOrMore, Word, Optional, Regex, Combine
-from pip._vendor.pyparsing import Literal as L  # noqa
-from pip._vendor.six.moves.urllib import parse as urlparse
-
-from .markers import MARKER_EXPR, Marker
-from .specifiers import LegacySpecifier, Specifier, SpecifierSet
-
-
-class InvalidRequirement(ValueError):
-    """
-    An invalid requirement was found, users should refer to PEP 508.
-    """
-
-
-ALPHANUM = Word(string.ascii_letters + string.digits)
-
-LBRACKET = L("[").suppress()
-RBRACKET = L("]").suppress()
-LPAREN = L("(").suppress()
-RPAREN = L(")").suppress()
-COMMA = L(",").suppress()
-SEMICOLON = L(";").suppress()
-AT = L("@").suppress()
-
-PUNCTUATION = Word("-_.")
-IDENTIFIER_END = ALPHANUM | (ZeroOrMore(PUNCTUATION) + ALPHANUM)
-IDENTIFIER = Combine(ALPHANUM + ZeroOrMore(IDENTIFIER_END))
-
-NAME = IDENTIFIER("name")
-EXTRA = IDENTIFIER
-
-URI = Regex(r"[^ ]+")("url")
-URL = AT + URI
-
-EXTRAS_LIST = EXTRA + ZeroOrMore(COMMA + EXTRA)
-EXTRAS = (LBRACKET + Optional(EXTRAS_LIST) + RBRACKET)("extras")
-
-VERSION_PEP440 = Regex(Specifier._regex_str, re.VERBOSE | re.IGNORECASE)
-VERSION_LEGACY = Regex(LegacySpecifier._regex_str, re.VERBOSE | re.IGNORECASE)
-
-VERSION_ONE = VERSION_PEP440 ^ VERSION_LEGACY
-VERSION_MANY = Combine(
-    VERSION_ONE + ZeroOrMore(COMMA + VERSION_ONE), joinString=",", adjacent=False
-)("_raw_spec")
-_VERSION_SPEC = Optional(((LPAREN + VERSION_MANY + RPAREN) | VERSION_MANY))
-_VERSION_SPEC.setParseAction(lambda s, l, t: t._raw_spec or "")
-
-VERSION_SPEC = originalTextFor(_VERSION_SPEC)("specifier")
-VERSION_SPEC.setParseAction(lambda s, l, t: t[1])
-
-MARKER_EXPR = originalTextFor(MARKER_EXPR())("marker")
-MARKER_EXPR.setParseAction(
-    lambda s, l, t: Marker(s[t._original_start : t._original_end])
-)
-MARKER_SEPARATOR = SEMICOLON
-MARKER = MARKER_SEPARATOR + MARKER_EXPR
-
-VERSION_AND_MARKER = VERSION_SPEC + Optional(MARKER)
-URL_AND_MARKER = URL + Optional(MARKER)
-
-NAMED_REQUIREMENT = NAME + Optional(EXTRAS) + (URL_AND_MARKER | VERSION_AND_MARKER)
-
-REQUIREMENT = stringStart + NAMED_REQUIREMENT + stringEnd
-# pyparsing isn't thread safe during initialization, so we do it eagerly, see
-# issue #104
-REQUIREMENT.parseString("x[]")
-
-
-class Requirement(object):
-    """Parse a requirement.
-
-    Parse a given requirement string into its parts, such as name, specifier,
-    URL, and extras. Raises InvalidRequirement on a badly-formed requirement
-    string.
-    """
-
-    # TODO: Can we test whether something is contained within a requirement?
-    #       If so how do we do that? Do we need to test against the _name_ of
-    #       the thing as well as the version? What about the markers?
-    # TODO: Can we normalize the name and extra name?
-
-    def __init__(self, requirement_string):
-        try:
-            req = REQUIREMENT.parseString(requirement_string)
-        except ParseException as e:
-            raise InvalidRequirement(
-                'Parse error at "{0!r}": {1}'.format(
-                    requirement_string[e.loc : e.loc + 8], e.msg
-                )
-            )
-
-        self.name = req.name
-        if req.url:
-            parsed_url = urlparse.urlparse(req.url)
-            if parsed_url.scheme == "file":
-                if urlparse.urlunparse(parsed_url) != req.url:
-                    raise InvalidRequirement("Invalid URL given")
-            elif not (parsed_url.scheme and parsed_url.netloc) or (
-                not parsed_url.scheme and not parsed_url.netloc
-            ):
-                raise InvalidRequirement("Invalid URL: {0}".format(req.url))
-            self.url = req.url
-        else:
-            self.url = None
-        self.extras = set(req.extras.asList() if req.extras else [])
-        self.specifier = SpecifierSet(req.specifier)
-        self.marker = req.marker if req.marker else None
-
-    def __str__(self):
-        parts = [self.name]
-
-        if self.extras:
-            parts.append("[{0}]".format(",".join(sorted(self.extras))))
-
-        if self.specifier:
-            parts.append(str(self.specifier))
-
-        if self.url:
-            parts.append("@ {0}".format(self.url))
-            if self.marker:
-                parts.append(" ")
-
-        if self.marker:
-            parts.append("; {0}".format(self.marker))
-
-        return "".join(parts)
-
-    def __repr__(self):
-        return "<Requirement({0!r})>".format(str(self))
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/packaging/specifiers.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/packaging/specifiers.py
deleted file mode 100644
index 743576a..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/packaging/specifiers.py
+++ /dev/null
@@ -1,749 +0,0 @@
-# This file is dual licensed under the terms of the Apache License, Version
-# 2.0, and the BSD License. See the LICENSE file in the root of this repository
-# for complete details.
-from __future__ import absolute_import, division, print_function
-
-import abc
-import functools
-import itertools
-import re
-
-from ._compat import string_types, with_metaclass
-from .version import Version, LegacyVersion, parse
-
-
-class InvalidSpecifier(ValueError):
-    """
-    An invalid specifier was found, users should refer to PEP 440.
-    """
-
-
-class BaseSpecifier(with_metaclass(abc.ABCMeta, object)):
-    @abc.abstractmethod
-    def __str__(self):
-        """
-        Returns the str representation of this Specifier like object. This
-        should be representative of the Specifier itself.
-        """
-
-    @abc.abstractmethod
-    def __hash__(self):
-        """
-        Returns a hash value for this Specifier like object.
-        """
-
-    @abc.abstractmethod
-    def __eq__(self, other):
-        """
-        Returns a boolean representing whether or not the two Specifier like
-        objects are equal.
-        """
-
-    @abc.abstractmethod
-    def __ne__(self, other):
-        """
-        Returns a boolean representing whether or not the two Specifier like
-        objects are not equal.
-        """
-
-    @abc.abstractproperty
-    def prereleases(self):
-        """
-        Returns whether or not pre-releases as a whole are allowed by this
-        specifier.
-        """
-
-    @prereleases.setter
-    def prereleases(self, value):
-        """
-        Sets whether or not pre-releases as a whole are allowed by this
-        specifier.
-        """
-
-    @abc.abstractmethod
-    def contains(self, item, prereleases=None):
-        """
-        Determines if the given item is contained within this specifier.
-        """
-
-    @abc.abstractmethod
-    def filter(self, iterable, prereleases=None):
-        """
-        Takes an iterable of items and filters them so that only items which
-        are contained within this specifier are allowed in it.
-        """
-
-
-class _IndividualSpecifier(BaseSpecifier):
-
-    _operators = {}
-
-    def __init__(self, spec="", prereleases=None):
-        match = self._regex.search(spec)
-        if not match:
-            raise InvalidSpecifier("Invalid specifier: '{0}'".format(spec))
-
-        self._spec = (match.group("operator").strip(), match.group("version").strip())
-
-        # Store whether or not this Specifier should accept prereleases
-        self._prereleases = prereleases
-
-    def __repr__(self):
-        pre = (
-            ", prereleases={0!r}".format(self.prereleases)
-            if self._prereleases is not None
-            else ""
-        )
-
-        return "<{0}({1!r}{2})>".format(self.__class__.__name__, str(self), pre)
-
-    def __str__(self):
-        return "{0}{1}".format(*self._spec)
-
-    def __hash__(self):
-        return hash(self._spec)
-
-    def __eq__(self, other):
-        if isinstance(other, string_types):
-            try:
-                other = self.__class__(other)
-            except InvalidSpecifier:
-                return NotImplemented
-        elif not isinstance(other, self.__class__):
-            return NotImplemented
-
-        return self._spec == other._spec
-
-    def __ne__(self, other):
-        if isinstance(other, string_types):
-            try:
-                other = self.__class__(other)
-            except InvalidSpecifier:
-                return NotImplemented
-        elif not isinstance(other, self.__class__):
-            return NotImplemented
-
-        return self._spec != other._spec
-
-    def _get_operator(self, op):
-        return getattr(self, "_compare_{0}".format(self._operators[op]))
-
-    def _coerce_version(self, version):
-        if not isinstance(version, (LegacyVersion, Version)):
-            version = parse(version)
-        return version
-
-    @property
-    def operator(self):
-        return self._spec[0]
-
-    @property
-    def version(self):
-        return self._spec[1]
-
-    @property
-    def prereleases(self):
-        return self._prereleases
-
-    @prereleases.setter
-    def prereleases(self, value):
-        self._prereleases = value
-
-    def __contains__(self, item):
-        return self.contains(item)
-
-    def contains(self, item, prereleases=None):
-        # Determine if prereleases are to be allowed or not.
-        if prereleases is None:
-            prereleases = self.prereleases
-
-        # Normalize item to a Version or LegacyVersion, this allows us to have
-        # a shortcut for ``"2.0" in Specifier(">=2")
-        item = self._coerce_version(item)
-
-        # Determine if we should be supporting prereleases in this specifier
-        # or not, if we do not support prereleases than we can short circuit
-        # logic if this version is a prereleases.
-        if item.is_prerelease and not prereleases:
-            return False
-
-        # Actually do the comparison to determine if this item is contained
-        # within this Specifier or not.
-        return self._get_operator(self.operator)(item, self.version)
-
-    def filter(self, iterable, prereleases=None):
-        yielded = False
-        found_prereleases = []
-
-        kw = {"prereleases": prereleases if prereleases is not None else True}
-
-        # Attempt to iterate over all the values in the iterable and if any of
-        # them match, yield them.
-        for version in iterable:
-            parsed_version = self._coerce_version(version)
-
-            if self.contains(parsed_version, **kw):
-                # If our version is a prerelease, and we were not set to allow
-                # prereleases, then we'll store it for later incase nothing
-                # else matches this specifier.
-                if parsed_version.is_prerelease and not (
-                    prereleases or self.prereleases
-                ):
-                    found_prereleases.append(version)
-                # Either this is not a prerelease, or we should have been
-                # accepting prereleases from the beginning.
-                else:
-                    yielded = True
-                    yield version
-
-        # Now that we've iterated over everything, determine if we've yielded
-        # any values, and if we have not and we have any prereleases stored up
-        # then we will go ahead and yield the prereleases.
-        if not yielded and found_prereleases:
-            for version in found_prereleases:
-                yield version
-
-
-class LegacySpecifier(_IndividualSpecifier):
-
-    _regex_str = r"""
-        (?P<operator>(==|!=|<=|>=|<|>))
-        \s*
-        (?P<version>
-            [^,;\s)]* # Since this is a "legacy" specifier, and the version
-                      # string can be just about anything, we match everything
-                      # except for whitespace, a semi-colon for marker support,
-                      # a closing paren since versions can be enclosed in
-                      # them, and a comma since it's a version separator.
-        )
-        """
-
-    _regex = re.compile(r"^\s*" + _regex_str + r"\s*$", re.VERBOSE | re.IGNORECASE)
-
-    _operators = {
-        "==": "equal",
-        "!=": "not_equal",
-        "<=": "less_than_equal",
-        ">=": "greater_than_equal",
-        "<": "less_than",
-        ">": "greater_than",
-    }
-
-    def _coerce_version(self, version):
-        if not isinstance(version, LegacyVersion):
-            version = LegacyVersion(str(version))
-        return version
-
-    def _compare_equal(self, prospective, spec):
-        return prospective == self._coerce_version(spec)
-
-    def _compare_not_equal(self, prospective, spec):
-        return prospective != self._coerce_version(spec)
-
-    def _compare_less_than_equal(self, prospective, spec):
-        return prospective <= self._coerce_version(spec)
-
-    def _compare_greater_than_equal(self, prospective, spec):
-        return prospective >= self._coerce_version(spec)
-
-    def _compare_less_than(self, prospective, spec):
-        return prospective < self._coerce_version(spec)
-
-    def _compare_greater_than(self, prospective, spec):
-        return prospective > self._coerce_version(spec)
-
-
-def _require_version_compare(fn):
-    @functools.wraps(fn)
-    def wrapped(self, prospective, spec):
-        if not isinstance(prospective, Version):
-            return False
-        return fn(self, prospective, spec)
-
-    return wrapped
-
-
-class Specifier(_IndividualSpecifier):
-
-    _regex_str = r"""
-        (?P<operator>(~=|==|!=|<=|>=|<|>|===))
-        (?P<version>
-            (?:
-                # The identity operators allow for an escape hatch that will
-                # do an exact string match of the version you wish to install.
-                # This will not be parsed by PEP 440 and we cannot determine
-                # any semantic meaning from it. This operator is discouraged
-                # but included entirely as an escape hatch.
-                (?<====)  # Only match for the identity operator
-                \s*
-                [^\s]*    # We just match everything, except for whitespace
-                          # since we are only testing for strict identity.
-            )
-            |
-            (?:
-                # The (non)equality operators allow for wild card and local
-                # versions to be specified so we have to define these two
-                # operators separately to enable that.
-                (?<===|!=)            # Only match for equals and not equals
-
-                \s*
-                v?
-                (?:[0-9]+!)?          # epoch
-                [0-9]+(?:\.[0-9]+)*   # release
-                (?:                   # pre release
-                    [-_\.]?
-                    (a|b|c|rc|alpha|beta|pre|preview)
-                    [-_\.]?
-                    [0-9]*
-                )?
-                (?:                   # post release
-                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
-                )?
-
-                # You cannot use a wild card and a dev or local version
-                # together so group them with a | and make them optional.
-                (?:
-                    (?:[-_\.]?dev[-_\.]?[0-9]*)?         # dev release
-                    (?:\+[a-z0-9]+(?:[-_\.][a-z0-9]+)*)? # local
-                    |
-                    \.\*  # Wild card syntax of .*
-                )?
-            )
-            |
-            (?:
-                # The compatible operator requires at least two digits in the
-                # release segment.
-                (?<=~=)               # Only match for the compatible operator
-
-                \s*
-                v?
-                (?:[0-9]+!)?          # epoch
-                [0-9]+(?:\.[0-9]+)+   # release  (We have a + instead of a *)
-                (?:                   # pre release
-                    [-_\.]?
-                    (a|b|c|rc|alpha|beta|pre|preview)
-                    [-_\.]?
-                    [0-9]*
-                )?
-                (?:                                   # post release
-                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
-                )?
-                (?:[-_\.]?dev[-_\.]?[0-9]*)?          # dev release
-            )
-            |
-            (?:
-                # All other operators only allow a sub set of what the
-                # (non)equality operators do. Specifically they do not allow
-                # local versions to be specified nor do they allow the prefix
-                # matching wild cards.
-                (?<!==|!=|~=)         # We have special cases for these
-                                      # operators so we want to make sure they
-                                      # don't match here.
-
-                \s*
-                v?
-                (?:[0-9]+!)?          # epoch
-                [0-9]+(?:\.[0-9]+)*   # release
-                (?:                   # pre release
-                    [-_\.]?
-                    (a|b|c|rc|alpha|beta|pre|preview)
-                    [-_\.]?
-                    [0-9]*
-                )?
-                (?:                                   # post release
-                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
-                )?
-                (?:[-_\.]?dev[-_\.]?[0-9]*)?          # dev release
-            )
-        )
-        """
-
-    _regex = re.compile(r"^\s*" + _regex_str + r"\s*$", re.VERBOSE | re.IGNORECASE)
-
-    _operators = {
-        "~=": "compatible",
-        "==": "equal",
-        "!=": "not_equal",
-        "<=": "less_than_equal",
-        ">=": "greater_than_equal",
-        "<": "less_than",
-        ">": "greater_than",
-        "===": "arbitrary",
-    }
-
-    @_require_version_compare
-    def _compare_compatible(self, prospective, spec):
-        # Compatible releases have an equivalent combination of >= and ==. That
-        # is that ~=2.2 is equivalent to >=2.2,==2.*. This allows us to
-        # implement this in terms of the other specifiers instead of
-        # implementing it ourselves. The only thing we need to do is construct
-        # the other specifiers.
-
-        # We want everything but the last item in the version, but we want to
-        # ignore post and dev releases and we want to treat the pre-release as
-        # it's own separate segment.
-        prefix = ".".join(
-            list(
-                itertools.takewhile(
-                    lambda x: (not x.startswith("post") and not x.startswith("dev")),
-                    _version_split(spec),
-                )
-            )[:-1]
-        )
-
-        # Add the prefix notation to the end of our string
-        prefix += ".*"
-
-        return self._get_operator(">=")(prospective, spec) and self._get_operator("==")(
-            prospective, prefix
-        )
-
-    @_require_version_compare
-    def _compare_equal(self, prospective, spec):
-        # We need special logic to handle prefix matching
-        if spec.endswith(".*"):
-            # In the case of prefix matching we want to ignore local segment.
-            prospective = Version(prospective.public)
-            # Split the spec out by dots, and pretend that there is an implicit
-            # dot in between a release segment and a pre-release segment.
-            spec = _version_split(spec[:-2])  # Remove the trailing .*
-
-            # Split the prospective version out by dots, and pretend that there
-            # is an implicit dot in between a release segment and a pre-release
-            # segment.
-            prospective = _version_split(str(prospective))
-
-            # Shorten the prospective version to be the same length as the spec
-            # so that we can determine if the specifier is a prefix of the
-            # prospective version or not.
-            prospective = prospective[: len(spec)]
-
-            # Pad out our two sides with zeros so that they both equal the same
-            # length.
-            spec, prospective = _pad_version(spec, prospective)
-        else:
-            # Convert our spec string into a Version
-            spec = Version(spec)
-
-            # If the specifier does not have a local segment, then we want to
-            # act as if the prospective version also does not have a local
-            # segment.
-            if not spec.local:
-                prospective = Version(prospective.public)
-
-        return prospective == spec
-
-    @_require_version_compare
-    def _compare_not_equal(self, prospective, spec):
-        return not self._compare_equal(prospective, spec)
-
-    @_require_version_compare
-    def _compare_less_than_equal(self, prospective, spec):
-        return prospective <= Version(spec)
-
-    @_require_version_compare
-    def _compare_greater_than_equal(self, prospective, spec):
-        return prospective >= Version(spec)
-
-    @_require_version_compare
-    def _compare_less_than(self, prospective, spec):
-        # Convert our spec to a Version instance, since we'll want to work with
-        # it as a version.
-        spec = Version(spec)
-
-        # Check to see if the prospective version is less than the spec
-        # version. If it's not we can short circuit and just return False now
-        # instead of doing extra unneeded work.
-        if not prospective < spec:
-            return False
-
-        # This special case is here so that, unless the specifier itself
-        # includes is a pre-release version, that we do not accept pre-release
-        # versions for the version mentioned in the specifier (e.g. <3.1 should
-        # not match 3.1.dev0, but should match 3.0.dev0).
-        if not spec.is_prerelease and prospective.is_prerelease:
-            if Version(prospective.base_version) == Version(spec.base_version):
-                return False
-
-        # If we've gotten to here, it means that prospective version is both
-        # less than the spec version *and* it's not a pre-release of the same
-        # version in the spec.
-        return True
-
-    @_require_version_compare
-    def _compare_greater_than(self, prospective, spec):
-        # Convert our spec to a Version instance, since we'll want to work with
-        # it as a version.
-        spec = Version(spec)
-
-        # Check to see if the prospective version is greater than the spec
-        # version. If it's not we can short circuit and just return False now
-        # instead of doing extra unneeded work.
-        if not prospective > spec:
-            return False
-
-        # This special case is here so that, unless the specifier itself
-        # includes is a post-release version, that we do not accept
-        # post-release versions for the version mentioned in the specifier
-        # (e.g. >3.1 should not match 3.0.post0, but should match 3.2.post0).
-        if not spec.is_postrelease and prospective.is_postrelease:
-            if Version(prospective.base_version) == Version(spec.base_version):
-                return False
-
-        # Ensure that we do not allow a local version of the version mentioned
-        # in the specifier, which is technically greater than, to match.
-        if prospective.local is not None:
-            if Version(prospective.base_version) == Version(spec.base_version):
-                return False
-
-        # If we've gotten to here, it means that prospective version is both
-        # greater than the spec version *and* it's not a pre-release of the
-        # same version in the spec.
-        return True
-
-    def _compare_arbitrary(self, prospective, spec):
-        return str(prospective).lower() == str(spec).lower()
-
-    @property
-    def prereleases(self):
-        # If there is an explicit prereleases set for this, then we'll just
-        # blindly use that.
-        if self._prereleases is not None:
-            return self._prereleases
-
-        # Look at all of our specifiers and determine if they are inclusive
-        # operators, and if they are if they are including an explicit
-        # prerelease.
-        operator, version = self._spec
-        if operator in ["==", ">=", "<=", "~=", "==="]:
-            # The == specifier can include a trailing .*, if it does we
-            # want to remove before parsing.
-            if operator == "==" and version.endswith(".*"):
-                version = version[:-2]
-
-            # Parse the version, and if it is a pre-release than this
-            # specifier allows pre-releases.
-            if parse(version).is_prerelease:
-                return True
-
-        return False
-
-    @prereleases.setter
-    def prereleases(self, value):
-        self._prereleases = value
-
-
-_prefix_regex = re.compile(r"^([0-9]+)((?:a|b|c|rc)[0-9]+)$")
-
-
-def _version_split(version):
-    result = []
-    for item in version.split("."):
-        match = _prefix_regex.search(item)
-        if match:
-            result.extend(match.groups())
-        else:
-            result.append(item)
-    return result
-
-
-def _pad_version(left, right):
-    left_split, right_split = [], []
-
-    # Get the release segment of our versions
-    left_split.append(list(itertools.takewhile(lambda x: x.isdigit(), left)))
-    right_split.append(list(itertools.takewhile(lambda x: x.isdigit(), right)))
-
-    # Get the rest of our versions
-    left_split.append(left[len(left_split[0]) :])
-    right_split.append(right[len(right_split[0]) :])
-
-    # Insert our padding
-    left_split.insert(1, ["0"] * max(0, len(right_split[0]) - len(left_split[0])))
-    right_split.insert(1, ["0"] * max(0, len(left_split[0]) - len(right_split[0])))
-
-    return (list(itertools.chain(*left_split)), list(itertools.chain(*right_split)))
-
-
-class SpecifierSet(BaseSpecifier):
-    def __init__(self, specifiers="", prereleases=None):
-        # Split on , to break each indidivual specifier into it's own item, and
-        # strip each item to remove leading/trailing whitespace.
-        specifiers = [s.strip() for s in specifiers.split(",") if s.strip()]
-
-        # Parsed each individual specifier, attempting first to make it a
-        # Specifier and falling back to a LegacySpecifier.
-        parsed = set()
-        for specifier in specifiers:
-            try:
-                parsed.add(Specifier(specifier))
-            except InvalidSpecifier:
-                parsed.add(LegacySpecifier(specifier))
-
-        # Turn our parsed specifiers into a frozen set and save them for later.
-        self._specs = frozenset(parsed)
-
-        # Store our prereleases value so we can use it later to determine if
-        # we accept prereleases or not.
-        self._prereleases = prereleases
-
-    def __repr__(self):
-        pre = (
-            ", prereleases={0!r}".format(self.prereleases)
-            if self._prereleases is not None
-            else ""
-        )
-
-        return "<SpecifierSet({0!r}{1})>".format(str(self), pre)
-
-    def __str__(self):
-        return ",".join(sorted(str(s) for s in self._specs))
-
-    def __hash__(self):
-        return hash(self._specs)
-
-    def __and__(self, other):
-        if isinstance(other, string_types):
-            other = SpecifierSet(other)
-        elif not isinstance(other, SpecifierSet):
-            return NotImplemented
-
-        specifier = SpecifierSet()
-        specifier._specs = frozenset(self._specs | other._specs)
-
-        if self._prereleases is None and other._prereleases is not None:
-            specifier._prereleases = other._prereleases
-        elif self._prereleases is not None and other._prereleases is None:
-            specifier._prereleases = self._prereleases
-        elif self._prereleases == other._prereleases:
-            specifier._prereleases = self._prereleases
-        else:
-            raise ValueError(
-                "Cannot combine SpecifierSets with True and False prerelease "
-                "overrides."
-            )
-
-        return specifier
-
-    def __eq__(self, other):
-        if isinstance(other, string_types):
-            other = SpecifierSet(other)
-        elif isinstance(other, _IndividualSpecifier):
-            other = SpecifierSet(str(other))
-        elif not isinstance(other, SpecifierSet):
-            return NotImplemented
-
-        return self._specs == other._specs
-
-    def __ne__(self, other):
-        if isinstance(other, string_types):
-            other = SpecifierSet(other)
-        elif isinstance(other, _IndividualSpecifier):
-            other = SpecifierSet(str(other))
-        elif not isinstance(other, SpecifierSet):
-            return NotImplemented
-
-        return self._specs != other._specs
-
-    def __len__(self):
-        return len(self._specs)
-
-    def __iter__(self):
-        return iter(self._specs)
-
-    @property
-    def prereleases(self):
-        # If we have been given an explicit prerelease modifier, then we'll
-        # pass that through here.
-        if self._prereleases is not None:
-            return self._prereleases
-
-        # If we don't have any specifiers, and we don't have a forced value,
-        # then we'll just return None since we don't know if this should have
-        # pre-releases or not.
-        if not self._specs:
-            return None
-
-        # Otherwise we'll see if any of the given specifiers accept
-        # prereleases, if any of them do we'll return True, otherwise False.
-        return any(s.prereleases for s in self._specs)
-
-    @prereleases.setter
-    def prereleases(self, value):
-        self._prereleases = value
-
-    def __contains__(self, item):
-        return self.contains(item)
-
-    def contains(self, item, prereleases=None):
-        # Ensure that our item is a Version or LegacyVersion instance.
-        if not isinstance(item, (LegacyVersion, Version)):
-            item = parse(item)
-
-        # Determine if we're forcing a prerelease or not, if we're not forcing
-        # one for this particular filter call, then we'll use whatever the
-        # SpecifierSet thinks for whether or not we should support prereleases.
-        if prereleases is None:
-            prereleases = self.prereleases
-
-        # We can determine if we're going to allow pre-releases by looking to
-        # see if any of the underlying items supports them. If none of them do
-        # and this item is a pre-release then we do not allow it and we can
-        # short circuit that here.
-        # Note: This means that 1.0.dev1 would not be contained in something
-        #       like >=1.0.devabc however it would be in >=1.0.debabc,>0.0.dev0
-        if not prereleases and item.is_prerelease:
-            return False
-
-        # We simply dispatch to the underlying specs here to make sure that the
-        # given version is contained within all of them.
-        # Note: This use of all() here means that an empty set of specifiers
-        #       will always return True, this is an explicit design decision.
-        return all(s.contains(item, prereleases=prereleases) for s in self._specs)
-
-    def filter(self, iterable, prereleases=None):
-        # Determine if we're forcing a prerelease or not, if we're not forcing
-        # one for this particular filter call, then we'll use whatever the
-        # SpecifierSet thinks for whether or not we should support prereleases.
-        if prereleases is None:
-            prereleases = self.prereleases
-
-        # If we have any specifiers, then we want to wrap our iterable in the
-        # filter method for each one, this will act as a logical AND amongst
-        # each specifier.
-        if self._specs:
-            for spec in self._specs:
-                iterable = spec.filter(iterable, prereleases=bool(prereleases))
-            return iterable
-        # If we do not have any specifiers, then we need to have a rough filter
-        # which will filter out any pre-releases, unless there are no final
-        # releases, and which will filter out LegacyVersion in general.
-        else:
-            filtered = []
-            found_prereleases = []
-
-            for item in iterable:
-                # Ensure that we some kind of Version class for this item.
-                if not isinstance(item, (LegacyVersion, Version)):
-                    parsed_version = parse(item)
-                else:
-                    parsed_version = item
-
-                # Filter out any item which is parsed as a LegacyVersion
-                if isinstance(parsed_version, LegacyVersion):
-                    continue
-
-                # Store any item which is a pre-release for later unless we've
-                # already found a final version or we are accepting prereleases
-                if parsed_version.is_prerelease and not prereleases:
-                    if not filtered:
-                        found_prereleases.append(item)
-                else:
-                    filtered.append(item)
-
-            # If we've found no items except for pre-releases, then we'll go
-            # ahead and use the pre-releases
-            if not filtered and found_prereleases and prereleases is None:
-                return found_prereleases
-
-            return filtered
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/packaging/utils.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/packaging/utils.py
deleted file mode 100644
index 8841878..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/packaging/utils.py
+++ /dev/null
@@ -1,57 +0,0 @@
-# This file is dual licensed under the terms of the Apache License, Version
-# 2.0, and the BSD License. See the LICENSE file in the root of this repository
-# for complete details.
-from __future__ import absolute_import, division, print_function
-
-import re
-
-from .version import InvalidVersion, Version
-
-
-_canonicalize_regex = re.compile(r"[-_.]+")
-
-
-def canonicalize_name(name):
-    # This is taken from PEP 503.
-    return _canonicalize_regex.sub("-", name).lower()
-
-
-def canonicalize_version(version):
-    """
-    This is very similar to Version.__str__, but has one subtle differences
-    with the way it handles the release segment.
-    """
-
-    try:
-        version = Version(version)
-    except InvalidVersion:
-        # Legacy versions cannot be normalized
-        return version
-
-    parts = []
-
-    # Epoch
-    if version.epoch != 0:
-        parts.append("{0}!".format(version.epoch))
-
-    # Release segment
-    # NB: This strips trailing '.0's to normalize
-    parts.append(re.sub(r"(\.0)+$", "", ".".join(str(x) for x in version.release)))
-
-    # Pre-release
-    if version.pre is not None:
-        parts.append("".join(str(x) for x in version.pre))
-
-    # Post-release
-    if version.post is not None:
-        parts.append(".post{0}".format(version.post))
-
-    # Development release
-    if version.dev is not None:
-        parts.append(".dev{0}".format(version.dev))
-
-    # Local version segment
-    if version.local is not None:
-        parts.append("+{0}".format(version.local))
-
-    return "".join(parts)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/packaging/version.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/packaging/version.py
deleted file mode 100644
index 95157a1..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/packaging/version.py
+++ /dev/null
@@ -1,420 +0,0 @@
-# This file is dual licensed under the terms of the Apache License, Version
-# 2.0, and the BSD License. See the LICENSE file in the root of this repository
-# for complete details.
-from __future__ import absolute_import, division, print_function
-
-import collections
-import itertools
-import re
-
-from ._structures import Infinity
-
-
-__all__ = ["parse", "Version", "LegacyVersion", "InvalidVersion", "VERSION_PATTERN"]
-
-
-_Version = collections.namedtuple(
-    "_Version", ["epoch", "release", "dev", "pre", "post", "local"]
-)
-
-
-def parse(version):
-    """
-    Parse the given version string and return either a :class:`Version` object
-    or a :class:`LegacyVersion` object depending on if the given version is
-    a valid PEP 440 version or a legacy version.
-    """
-    try:
-        return Version(version)
-    except InvalidVersion:
-        return LegacyVersion(version)
-
-
-class InvalidVersion(ValueError):
-    """
-    An invalid version was found, users should refer to PEP 440.
-    """
-
-
-class _BaseVersion(object):
-    def __hash__(self):
-        return hash(self._key)
-
-    def __lt__(self, other):
-        return self._compare(other, lambda s, o: s < o)
-
-    def __le__(self, other):
-        return self._compare(other, lambda s, o: s <= o)
-
-    def __eq__(self, other):
-        return self._compare(other, lambda s, o: s == o)
-
-    def __ge__(self, other):
-        return self._compare(other, lambda s, o: s >= o)
-
-    def __gt__(self, other):
-        return self._compare(other, lambda s, o: s > o)
-
-    def __ne__(self, other):
-        return self._compare(other, lambda s, o: s != o)
-
-    def _compare(self, other, method):
-        if not isinstance(other, _BaseVersion):
-            return NotImplemented
-
-        return method(self._key, other._key)
-
-
-class LegacyVersion(_BaseVersion):
-    def __init__(self, version):
-        self._version = str(version)
-        self._key = _legacy_cmpkey(self._version)
-
-    def __str__(self):
-        return self._version
-
-    def __repr__(self):
-        return "<LegacyVersion({0})>".format(repr(str(self)))
-
-    @property
-    def public(self):
-        return self._version
-
-    @property
-    def base_version(self):
-        return self._version
-
-    @property
-    def epoch(self):
-        return -1
-
-    @property
-    def release(self):
-        return None
-
-    @property
-    def pre(self):
-        return None
-
-    @property
-    def post(self):
-        return None
-
-    @property
-    def dev(self):
-        return None
-
-    @property
-    def local(self):
-        return None
-
-    @property
-    def is_prerelease(self):
-        return False
-
-    @property
-    def is_postrelease(self):
-        return False
-
-    @property
-    def is_devrelease(self):
-        return False
-
-
-_legacy_version_component_re = re.compile(r"(\d+ | [a-z]+ | \.| -)", re.VERBOSE)
-
-_legacy_version_replacement_map = {
-    "pre": "c",
-    "preview": "c",
-    "-": "final-",
-    "rc": "c",
-    "dev": "@",
-}
-
-
-def _parse_version_parts(s):
-    for part in _legacy_version_component_re.split(s):
-        part = _legacy_version_replacement_map.get(part, part)
-
-        if not part or part == ".":
-            continue
-
-        if part[:1] in "0123456789":
-            # pad for numeric comparison
-            yield part.zfill(8)
-        else:
-            yield "*" + part
-
-    # ensure that alpha/beta/candidate are before final
-    yield "*final"
-
-
-def _legacy_cmpkey(version):
-    # We hardcode an epoch of -1 here. A PEP 440 version can only have a epoch
-    # greater than or equal to 0. This will effectively put the LegacyVersion,
-    # which uses the defacto standard originally implemented by setuptools,
-    # as before all PEP 440 versions.
-    epoch = -1
-
-    # This scheme is taken from pkg_resources.parse_version setuptools prior to
-    # it's adoption of the packaging library.
-    parts = []
-    for part in _parse_version_parts(version.lower()):
-        if part.startswith("*"):
-            # remove "-" before a prerelease tag
-            if part < "*final":
-                while parts and parts[-1] == "*final-":
-                    parts.pop()
-
-            # remove trailing zeros from each series of numeric parts
-            while parts and parts[-1] == "00000000":
-                parts.pop()
-
-        parts.append(part)
-    parts = tuple(parts)
-
-    return epoch, parts
-
-
-# Deliberately not anchored to the start and end of the string, to make it
-# easier for 3rd party code to reuse
-VERSION_PATTERN = r"""
-    v?
-    (?:
-        (?:(?P<epoch>[0-9]+)!)?                           # epoch
-        (?P<release>[0-9]+(?:\.[0-9]+)*)                  # release segment
-        (?P<pre>                                          # pre-release
-            [-_\.]?
-            (?P<pre_l>(a|b|c|rc|alpha|beta|pre|preview))
-            [-_\.]?
-            (?P<pre_n>[0-9]+)?
-        )?
-        (?P<post>                                         # post release
-            (?:-(?P<post_n1>[0-9]+))
-            |
-            (?:
-                [-_\.]?
-                (?P<post_l>post|rev|r)
-                [-_\.]?
-                (?P<post_n2>[0-9]+)?
-            )
-        )?
-        (?P<dev>                                          # dev release
-            [-_\.]?
-            (?P<dev_l>dev)
-            [-_\.]?
-            (?P<dev_n>[0-9]+)?
-        )?
-    )
-    (?:\+(?P<local>[a-z0-9]+(?:[-_\.][a-z0-9]+)*))?       # local version
-"""
-
-
-class Version(_BaseVersion):
-
-    _regex = re.compile(r"^\s*" + VERSION_PATTERN + r"\s*$", re.VERBOSE | re.IGNORECASE)
-
-    def __init__(self, version):
-        # Validate the version and parse it into pieces
-        match = self._regex.search(version)
-        if not match:
-            raise InvalidVersion("Invalid version: '{0}'".format(version))
-
-        # Store the parsed out pieces of the version
-        self._version = _Version(
-            epoch=int(match.group("epoch")) if match.group("epoch") else 0,
-            release=tuple(int(i) for i in match.group("release").split(".")),
-            pre=_parse_letter_version(match.group("pre_l"), match.group("pre_n")),
-            post=_parse_letter_version(
-                match.group("post_l"), match.group("post_n1") or match.group("post_n2")
-            ),
-            dev=_parse_letter_version(match.group("dev_l"), match.group("dev_n")),
-            local=_parse_local_version(match.group("local")),
-        )
-
-        # Generate a key which will be used for sorting
-        self._key = _cmpkey(
-            self._version.epoch,
-            self._version.release,
-            self._version.pre,
-            self._version.post,
-            self._version.dev,
-            self._version.local,
-        )
-
-    def __repr__(self):
-        return "<Version({0})>".format(repr(str(self)))
-
-    def __str__(self):
-        parts = []
-
-        # Epoch
-        if self.epoch != 0:
-            parts.append("{0}!".format(self.epoch))
-
-        # Release segment
-        parts.append(".".join(str(x) for x in self.release))
-
-        # Pre-release
-        if self.pre is not None:
-            parts.append("".join(str(x) for x in self.pre))
-
-        # Post-release
-        if self.post is not None:
-            parts.append(".post{0}".format(self.post))
-
-        # Development release
-        if self.dev is not None:
-            parts.append(".dev{0}".format(self.dev))
-
-        # Local version segment
-        if self.local is not None:
-            parts.append("+{0}".format(self.local))
-
-        return "".join(parts)
-
-    @property
-    def epoch(self):
-        return self._version.epoch
-
-    @property
-    def release(self):
-        return self._version.release
-
-    @property
-    def pre(self):
-        return self._version.pre
-
-    @property
-    def post(self):
-        return self._version.post[1] if self._version.post else None
-
-    @property
-    def dev(self):
-        return self._version.dev[1] if self._version.dev else None
-
-    @property
-    def local(self):
-        if self._version.local:
-            return ".".join(str(x) for x in self._version.local)
-        else:
-            return None
-
-    @property
-    def public(self):
-        return str(self).split("+", 1)[0]
-
-    @property
-    def base_version(self):
-        parts = []
-
-        # Epoch
-        if self.epoch != 0:
-            parts.append("{0}!".format(self.epoch))
-
-        # Release segment
-        parts.append(".".join(str(x) for x in self.release))
-
-        return "".join(parts)
-
-    @property
-    def is_prerelease(self):
-        return self.dev is not None or self.pre is not None
-
-    @property
-    def is_postrelease(self):
-        return self.post is not None
-
-    @property
-    def is_devrelease(self):
-        return self.dev is not None
-
-
-def _parse_letter_version(letter, number):
-    if letter:
-        # We consider there to be an implicit 0 in a pre-release if there is
-        # not a numeral associated with it.
-        if number is None:
-            number = 0
-
-        # We normalize any letters to their lower case form
-        letter = letter.lower()
-
-        # We consider some words to be alternate spellings of other words and
-        # in those cases we want to normalize the spellings to our preferred
-        # spelling.
-        if letter == "alpha":
-            letter = "a"
-        elif letter == "beta":
-            letter = "b"
-        elif letter in ["c", "pre", "preview"]:
-            letter = "rc"
-        elif letter in ["rev", "r"]:
-            letter = "post"
-
-        return letter, int(number)
-    if not letter and number:
-        # We assume if we are given a number, but we are not given a letter
-        # then this is using the implicit post release syntax (e.g. 1.0-1)
-        letter = "post"
-
-        return letter, int(number)
-
-
-_local_version_separators = re.compile(r"[\._-]")
-
-
-def _parse_local_version(local):
-    """
-    Takes a string like abc.1.twelve and turns it into ("abc", 1, "twelve").
-    """
-    if local is not None:
-        return tuple(
-            part.lower() if not part.isdigit() else int(part)
-            for part in _local_version_separators.split(local)
-        )
-
-
-def _cmpkey(epoch, release, pre, post, dev, local):
-    # When we compare a release version, we want to compare it with all of the
-    # trailing zeros removed. So we'll use a reverse the list, drop all the now
-    # leading zeros until we come to something non zero, then take the rest
-    # re-reverse it back into the correct order and make it a tuple and use
-    # that for our sorting key.
-    release = tuple(
-        reversed(list(itertools.dropwhile(lambda x: x == 0, reversed(release))))
-    )
-
-    # We need to "trick" the sorting algorithm to put 1.0.dev0 before 1.0a0.
-    # We'll do this by abusing the pre segment, but we _only_ want to do this
-    # if there is not a pre or a post segment. If we have one of those then
-    # the normal sorting rules will handle this case correctly.
-    if pre is None and post is None and dev is not None:
-        pre = -Infinity
-    # Versions without a pre-release (except as noted above) should sort after
-    # those with one.
-    elif pre is None:
-        pre = Infinity
-
-    # Versions without a post segment should sort before those with one.
-    if post is None:
-        post = -Infinity
-
-    # Versions without a development segment should sort after those with one.
-    if dev is None:
-        dev = Infinity
-
-    if local is None:
-        # Versions without a local segment should sort before those with one.
-        local = -Infinity
-    else:
-        # Versions with a local segment need that segment parsed to implement
-        # the sorting rules in PEP440.
-        # - Alpha numeric segments sort before numeric segments
-        # - Alpha numeric segments sort lexicographically
-        # - Numeric segments sort numerically
-        # - Shorter versions sort before longer versions when the prefixes
-        #   match exactly
-        local = tuple((i, "") if isinstance(i, int) else (-Infinity, i) for i in local)
-
-    return epoch, release, pre, post, dev, local
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pep517/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pep517/__init__.py
deleted file mode 100644
index 9c1a098..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pep517/__init__.py
+++ /dev/null
@@ -1,4 +0,0 @@
-"""Wrappers to build Python packages using PEP 517 hooks
-"""
-
-__version__ = '0.5.0'
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pep517/_in_process.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pep517/_in_process.py
deleted file mode 100644
index d6524b6..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pep517/_in_process.py
+++ /dev/null
@@ -1,207 +0,0 @@
-"""This is invoked in a subprocess to call the build backend hooks.
-
-It expects:
-- Command line args: hook_name, control_dir
-- Environment variable: PEP517_BUILD_BACKEND=entry.point:spec
-- control_dir/input.json:
-  - {"kwargs": {...}}
-
-Results:
-- control_dir/output.json
-  - {"return_val": ...}
-"""
-from glob import glob
-from importlib import import_module
-import os
-from os.path import join as pjoin
-import re
-import shutil
-import sys
-
-# This is run as a script, not a module, so it can't do a relative import
-import compat
-
-
-class BackendUnavailable(Exception):
-    """Raised if we cannot import the backend"""
-
-
-def _build_backend():
-    """Find and load the build backend"""
-    ep = os.environ['PEP517_BUILD_BACKEND']
-    mod_path, _, obj_path = ep.partition(':')
-    try:
-        obj = import_module(mod_path)
-    except ImportError:
-        raise BackendUnavailable
-    if obj_path:
-        for path_part in obj_path.split('.'):
-            obj = getattr(obj, path_part)
-    return obj
-
-
-def get_requires_for_build_wheel(config_settings):
-    """Invoke the optional get_requires_for_build_wheel hook
-
-    Returns [] if the hook is not defined.
-    """
-    backend = _build_backend()
-    try:
-        hook = backend.get_requires_for_build_wheel
-    except AttributeError:
-        return []
-    else:
-        return hook(config_settings)
-
-
-def prepare_metadata_for_build_wheel(metadata_directory, config_settings):
-    """Invoke optional prepare_metadata_for_build_wheel
-
-    Implements a fallback by building a wheel if the hook isn't defined.
-    """
-    backend = _build_backend()
-    try:
-        hook = backend.prepare_metadata_for_build_wheel
-    except AttributeError:
-        return _get_wheel_metadata_from_wheel(backend, metadata_directory,
-                                              config_settings)
-    else:
-        return hook(metadata_directory, config_settings)
-
-
-WHEEL_BUILT_MARKER = 'PEP517_ALREADY_BUILT_WHEEL'
-
-
-def _dist_info_files(whl_zip):
-    """Identify the .dist-info folder inside a wheel ZipFile."""
-    res = []
-    for path in whl_zip.namelist():
-        m = re.match(r'[^/\\]+-[^/\\]+\.dist-info/', path)
-        if m:
-            res.append(path)
-    if res:
-        return res
-    raise Exception("No .dist-info folder found in wheel")
-
-
-def _get_wheel_metadata_from_wheel(
-        backend, metadata_directory, config_settings):
-    """Build a wheel and extract the metadata from it.
-
-    Fallback for when the build backend does not
-    define the 'get_wheel_metadata' hook.
-    """
-    from zipfile import ZipFile
-    whl_basename = backend.build_wheel(metadata_directory, config_settings)
-    with open(os.path.join(metadata_directory, WHEEL_BUILT_MARKER), 'wb'):
-        pass  # Touch marker file
-
-    whl_file = os.path.join(metadata_directory, whl_basename)
-    with ZipFile(whl_file) as zipf:
-        dist_info = _dist_info_files(zipf)
-        zipf.extractall(path=metadata_directory, members=dist_info)
-    return dist_info[0].split('/')[0]
-
-
-def _find_already_built_wheel(metadata_directory):
-    """Check for a wheel already built during the get_wheel_metadata hook.
-    """
-    if not metadata_directory:
-        return None
-    metadata_parent = os.path.dirname(metadata_directory)
-    if not os.path.isfile(pjoin(metadata_parent, WHEEL_BUILT_MARKER)):
-        return None
-
-    whl_files = glob(os.path.join(metadata_parent, '*.whl'))
-    if not whl_files:
-        print('Found wheel built marker, but no .whl files')
-        return None
-    if len(whl_files) > 1:
-        print('Found multiple .whl files; unspecified behaviour. '
-              'Will call build_wheel.')
-        return None
-
-    # Exactly one .whl file
-    return whl_files[0]
-
-
-def build_wheel(wheel_directory, config_settings, metadata_directory=None):
-    """Invoke the mandatory build_wheel hook.
-
-    If a wheel was already built in the
-    prepare_metadata_for_build_wheel fallback, this
-    will copy it rather than rebuilding the wheel.
-    """
-    prebuilt_whl = _find_already_built_wheel(metadata_directory)
-    if prebuilt_whl:
-        shutil.copy2(prebuilt_whl, wheel_directory)
-        return os.path.basename(prebuilt_whl)
-
-    return _build_backend().build_wheel(wheel_directory, config_settings,
-                                        metadata_directory)
-
-
-def get_requires_for_build_sdist(config_settings):
-    """Invoke the optional get_requires_for_build_wheel hook
-
-    Returns [] if the hook is not defined.
-    """
-    backend = _build_backend()
-    try:
-        hook = backend.get_requires_for_build_sdist
-    except AttributeError:
-        return []
-    else:
-        return hook(config_settings)
-
-
-class _DummyException(Exception):
-    """Nothing should ever raise this exception"""
-
-
-class GotUnsupportedOperation(Exception):
-    """For internal use when backend raises UnsupportedOperation"""
-
-
-def build_sdist(sdist_directory, config_settings):
-    """Invoke the mandatory build_sdist hook."""
-    backend = _build_backend()
-    try:
-        return backend.build_sdist(sdist_directory, config_settings)
-    except getattr(backend, 'UnsupportedOperation', _DummyException):
-        raise GotUnsupportedOperation
-
-
-HOOK_NAMES = {
-    'get_requires_for_build_wheel',
-    'prepare_metadata_for_build_wheel',
-    'build_wheel',
-    'get_requires_for_build_sdist',
-    'build_sdist',
-}
-
-
-def main():
-    if len(sys.argv) < 3:
-        sys.exit("Needs args: hook_name, control_dir")
-    hook_name = sys.argv[1]
-    control_dir = sys.argv[2]
-    if hook_name not in HOOK_NAMES:
-        sys.exit("Unknown hook: %s" % hook_name)
-    hook = globals()[hook_name]
-
-    hook_input = compat.read_json(pjoin(control_dir, 'input.json'))
-
-    json_out = {'unsupported': False, 'return_val': None}
-    try:
-        json_out['return_val'] = hook(**hook_input['kwargs'])
-    except BackendUnavailable:
-        json_out['no_backend'] = True
-    except GotUnsupportedOperation:
-        json_out['unsupported'] = True
-
-    compat.write_json(json_out, pjoin(control_dir, 'output.json'), indent=2)
-
-
-if __name__ == '__main__':
-    main()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pep517/build.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pep517/build.py
deleted file mode 100644
index ac6c949..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pep517/build.py
+++ /dev/null
@@ -1,108 +0,0 @@
-"""Build a project using PEP 517 hooks.
-"""
-import argparse
-import logging
-import os
-import contextlib
-from pip._vendor import pytoml
-import shutil
-import errno
-import tempfile
-
-from .envbuild import BuildEnvironment
-from .wrappers import Pep517HookCaller
-
-log = logging.getLogger(__name__)
-
-
-@contextlib.contextmanager
-def tempdir():
-    td = tempfile.mkdtemp()
-    try:
-        yield td
-    finally:
-        shutil.rmtree(td)
-
-
-def _do_build(hooks, env, dist, dest):
-    get_requires_name = 'get_requires_for_build_{dist}'.format(**locals())
-    get_requires = getattr(hooks, get_requires_name)
-    reqs = get_requires({})
-    log.info('Got build requires: %s', reqs)
-
-    env.pip_install(reqs)
-    log.info('Installed dynamic build dependencies')
-
-    with tempdir() as td:
-        log.info('Trying to build %s in %s', dist, td)
-        build_name = 'build_{dist}'.format(**locals())
-        build = getattr(hooks, build_name)
-        filename = build(td, {})
-        source = os.path.join(td, filename)
-        shutil.move(source, os.path.join(dest, os.path.basename(filename)))
-
-
-def mkdir_p(*args, **kwargs):
-    """Like `mkdir`, but does not raise an exception if the
-    directory already exists.
-    """
-    try:
-        return os.mkdir(*args, **kwargs)
-    except OSError as exc:
-        if exc.errno != errno.EEXIST:
-            raise
-
-
-def build(source_dir, dist, dest=None):
-    pyproject = os.path.join(source_dir, 'pyproject.toml')
-    dest = os.path.join(source_dir, dest or 'dist')
-    mkdir_p(dest)
-
-    with open(pyproject) as f:
-        pyproject_data = pytoml.load(f)
-    # Ensure the mandatory data can be loaded
-    buildsys = pyproject_data['build-system']
-    requires = buildsys['requires']
-    backend = buildsys['build-backend']
-
-    hooks = Pep517HookCaller(source_dir, backend)
-
-    with BuildEnvironment() as env:
-        env.pip_install(requires)
-        _do_build(hooks, env, dist, dest)
-
-
-parser = argparse.ArgumentParser()
-parser.add_argument(
-    'source_dir',
-    help="A directory containing pyproject.toml",
-)
-parser.add_argument(
-    '--binary', '-b',
-    action='store_true',
-    default=False,
-)
-parser.add_argument(
-    '--source', '-s',
-    action='store_true',
-    default=False,
-)
-parser.add_argument(
-    '--out-dir', '-o',
-    help="Destination in which to save the builds relative to source dir",
-)
-
-
-def main(args):
-    # determine which dists to build
-    dists = list(filter(None, (
-        'sdist' if args.source or not args.binary else None,
-        'wheel' if args.binary or not args.source else None,
-    )))
-
-    for dist in dists:
-        build(args.source_dir, dist, args.out_dir)
-
-
-if __name__ == '__main__':
-    main(parser.parse_args())
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pep517/check.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pep517/check.py
deleted file mode 100644
index f4cdc6b..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pep517/check.py
+++ /dev/null
@@ -1,202 +0,0 @@
-"""Check a project and backend by attempting to build using PEP 517 hooks.
-"""
-import argparse
-import logging
-import os
-from os.path import isfile, join as pjoin
-from pip._vendor.pytoml import TomlError, load as toml_load
-import shutil
-from subprocess import CalledProcessError
-import sys
-import tarfile
-from tempfile import mkdtemp
-import zipfile
-
-from .colorlog import enable_colourful_output
-from .envbuild import BuildEnvironment
-from .wrappers import Pep517HookCaller
-
-log = logging.getLogger(__name__)
-
-
-def check_build_sdist(hooks, build_sys_requires):
-    with BuildEnvironment() as env:
-        try:
-            env.pip_install(build_sys_requires)
-            log.info('Installed static build dependencies')
-        except CalledProcessError:
-            log.error('Failed to install static build dependencies')
-            return False
-
-        try:
-            reqs = hooks.get_requires_for_build_sdist({})
-            log.info('Got build requires: %s', reqs)
-        except Exception:
-            log.error('Failure in get_requires_for_build_sdist', exc_info=True)
-            return False
-
-        try:
-            env.pip_install(reqs)
-            log.info('Installed dynamic build dependencies')
-        except CalledProcessError:
-            log.error('Failed to install dynamic build dependencies')
-            return False
-
-        td = mkdtemp()
-        log.info('Trying to build sdist in %s', td)
-        try:
-            try:
-                filename = hooks.build_sdist(td, {})
-                log.info('build_sdist returned %r', filename)
-            except Exception:
-                log.info('Failure in build_sdist', exc_info=True)
-                return False
-
-            if not filename.endswith('.tar.gz'):
-                log.error(
-                    "Filename %s doesn't have .tar.gz extension", filename)
-                return False
-
-            path = pjoin(td, filename)
-            if isfile(path):
-                log.info("Output file %s exists", path)
-            else:
-                log.error("Output file %s does not exist", path)
-                return False
-
-            if tarfile.is_tarfile(path):
-                log.info("Output file is a tar file")
-            else:
-                log.error("Output file is not a tar file")
-                return False
-
-        finally:
-            shutil.rmtree(td)
-
-        return True
-
-
-def check_build_wheel(hooks, build_sys_requires):
-    with BuildEnvironment() as env:
-        try:
-            env.pip_install(build_sys_requires)
-            log.info('Installed static build dependencies')
-        except CalledProcessError:
-            log.error('Failed to install static build dependencies')
-            return False
-
-        try:
-            reqs = hooks.get_requires_for_build_wheel({})
-            log.info('Got build requires: %s', reqs)
-        except Exception:
-            log.error('Failure in get_requires_for_build_sdist', exc_info=True)
-            return False
-
-        try:
-            env.pip_install(reqs)
-            log.info('Installed dynamic build dependencies')
-        except CalledProcessError:
-            log.error('Failed to install dynamic build dependencies')
-            return False
-
-        td = mkdtemp()
-        log.info('Trying to build wheel in %s', td)
-        try:
-            try:
-                filename = hooks.build_wheel(td, {})
-                log.info('build_wheel returned %r', filename)
-            except Exception:
-                log.info('Failure in build_wheel', exc_info=True)
-                return False
-
-            if not filename.endswith('.whl'):
-                log.error("Filename %s doesn't have .whl extension", filename)
-                return False
-
-            path = pjoin(td, filename)
-            if isfile(path):
-                log.info("Output file %s exists", path)
-            else:
-                log.error("Output file %s does not exist", path)
-                return False
-
-            if zipfile.is_zipfile(path):
-                log.info("Output file is a zip file")
-            else:
-                log.error("Output file is not a zip file")
-                return False
-
-        finally:
-            shutil.rmtree(td)
-
-        return True
-
-
-def check(source_dir):
-    pyproject = pjoin(source_dir, 'pyproject.toml')
-    if isfile(pyproject):
-        log.info('Found pyproject.toml')
-    else:
-        log.error('Missing pyproject.toml')
-        return False
-
-    try:
-        with open(pyproject) as f:
-            pyproject_data = toml_load(f)
-        # Ensure the mandatory data can be loaded
-        buildsys = pyproject_data['build-system']
-        requires = buildsys['requires']
-        backend = buildsys['build-backend']
-        log.info('Loaded pyproject.toml')
-    except (TomlError, KeyError):
-        log.error("Invalid pyproject.toml", exc_info=True)
-        return False
-
-    hooks = Pep517HookCaller(source_dir, backend)
-
-    sdist_ok = check_build_sdist(hooks, requires)
-    wheel_ok = check_build_wheel(hooks, requires)
-
-    if not sdist_ok:
-        log.warning('Sdist checks failed; scroll up to see')
-    if not wheel_ok:
-        log.warning('Wheel checks failed')
-
-    return sdist_ok
-
-
-def main(argv=None):
-    ap = argparse.ArgumentParser()
-    ap.add_argument(
-        'source_dir',
-        help="A directory containing pyproject.toml")
-    args = ap.parse_args(argv)
-
-    enable_colourful_output()
-
-    ok = check(args.source_dir)
-
-    if ok:
-        print(ansi('Checks passed', 'green'))
-    else:
-        print(ansi('Checks failed', 'red'))
-        sys.exit(1)
-
-
-ansi_codes = {
-    'reset': '\x1b[0m',
-    'bold': '\x1b[1m',
-    'red': '\x1b[31m',
-    'green': '\x1b[32m',
-}
-
-
-def ansi(s, attr):
-    if os.name != 'nt' and sys.stdout.isatty():
-        return ansi_codes[attr] + str(s) + ansi_codes['reset']
-    else:
-        return str(s)
-
-
-if __name__ == '__main__':
-    main()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pep517/colorlog.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pep517/colorlog.py
deleted file mode 100644
index 69c8a59..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pep517/colorlog.py
+++ /dev/null
@@ -1,115 +0,0 @@
-"""Nicer log formatting with colours.
-
-Code copied from Tornado, Apache licensed.
-"""
-# Copyright 2012 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-import logging
-import sys
-
-try:
-    import curses
-except ImportError:
-    curses = None
-
-
-def _stderr_supports_color():
-    color = False
-    if curses and hasattr(sys.stderr, 'isatty') and sys.stderr.isatty():
-        try:
-            curses.setupterm()
-            if curses.tigetnum("colors") > 0:
-                color = True
-        except Exception:
-            pass
-    return color
-
-
-class LogFormatter(logging.Formatter):
-    """Log formatter with colour support
-    """
-    DEFAULT_COLORS = {
-        logging.INFO: 2,  # Green
-        logging.WARNING: 3,  # Yellow
-        logging.ERROR: 1,  # Red
-        logging.CRITICAL: 1,
-    }
-
-    def __init__(self, color=True, datefmt=None):
-        r"""
-        :arg bool color: Enables color support.
-        :arg string fmt: Log message format.
-        It will be applied to the attributes dict of log records. The
-        text between ``%(color)s`` and ``%(end_color)s`` will be colored
-        depending on the level if color support is on.
-        :arg dict colors: color mappings from logging level to terminal color
-        code
-        :arg string datefmt: Datetime format.
-        Used for formatting ``(asctime)`` placeholder in ``prefix_fmt``.
-        .. versionchanged:: 3.2
-        Added ``fmt`` and ``datefmt`` arguments.
-        """
-        logging.Formatter.__init__(self, datefmt=datefmt)
-        self._colors = {}
-        if color and _stderr_supports_color():
-            # The curses module has some str/bytes confusion in
-            # python3. Until version 3.2.3, most methods return
-            # bytes, but only accept strings. In addition, we want to
-            # output these strings with the logging module, which
-            # works with unicode strings. The explicit calls to
-            # unicode() below are harmless in python2 but will do the
-            # right conversion in python 3.
-            fg_color = (curses.tigetstr("setaf") or
-                        curses.tigetstr("setf") or "")
-            if (3, 0) < sys.version_info < (3, 2, 3):
-                fg_color = str(fg_color, "ascii")
-
-            for levelno, code in self.DEFAULT_COLORS.items():
-                self._colors[levelno] = str(
-                    curses.tparm(fg_color, code), "ascii")
-            self._normal = str(curses.tigetstr("sgr0"), "ascii")
-
-            scr = curses.initscr()
-            self.termwidth = scr.getmaxyx()[1]
-            curses.endwin()
-        else:
-            self._normal = ''
-            # Default width is usually 80, but too wide is
-            # worse than too narrow
-            self.termwidth = 70
-
-    def formatMessage(self, record):
-        mlen = len(record.message)
-        right_text = '{initial}-{name}'.format(initial=record.levelname[0],
-                                               name=record.name)
-        if mlen + len(right_text) < self.termwidth:
-            space = ' ' * (self.termwidth - (mlen + len(right_text)))
-        else:
-            space = '  '
-
-        if record.levelno in self._colors:
-            start_color = self._colors[record.levelno]
-            end_color = self._normal
-        else:
-            start_color = end_color = ''
-
-        return record.message + space + start_color + right_text + end_color
-
-
-def enable_colourful_output(level=logging.INFO):
-    handler = logging.StreamHandler()
-    handler.setFormatter(LogFormatter())
-    logging.root.addHandler(handler)
-    logging.root.setLevel(level)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pep517/compat.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pep517/compat.py
deleted file mode 100644
index 01c66fc..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pep517/compat.py
+++ /dev/null
@@ -1,23 +0,0 @@
-"""Handle reading and writing JSON in UTF-8, on Python 3 and 2."""
-import json
-import sys
-
-if sys.version_info[0] >= 3:
-    # Python 3
-    def write_json(obj, path, **kwargs):
-        with open(path, 'w', encoding='utf-8') as f:
-            json.dump(obj, f, **kwargs)
-
-    def read_json(path):
-        with open(path, 'r', encoding='utf-8') as f:
-            return json.load(f)
-
-else:
-    # Python 2
-    def write_json(obj, path, **kwargs):
-        with open(path, 'wb') as f:
-            json.dump(obj, f, encoding='utf-8', **kwargs)
-
-    def read_json(path):
-        with open(path, 'rb') as f:
-            return json.load(f)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pep517/envbuild.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pep517/envbuild.py
deleted file mode 100644
index f7ac5f4..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pep517/envbuild.py
+++ /dev/null
@@ -1,158 +0,0 @@
-"""Build wheels/sdists by installing build deps to a temporary environment.
-"""
-
-import os
-import logging
-from pip._vendor import pytoml
-import shutil
-from subprocess import check_call
-import sys
-from sysconfig import get_paths
-from tempfile import mkdtemp
-
-from .wrappers import Pep517HookCaller
-
-log = logging.getLogger(__name__)
-
-
-def _load_pyproject(source_dir):
-    with open(os.path.join(source_dir, 'pyproject.toml')) as f:
-        pyproject_data = pytoml.load(f)
-    buildsys = pyproject_data['build-system']
-    return buildsys['requires'], buildsys['build-backend']
-
-
-class BuildEnvironment(object):
-    """Context manager to install build deps in a simple temporary environment
-
-    Based on code I wrote for pip, which is MIT licensed.
-    """
-    # Copyright (c) 2008-2016 The pip developers (see AUTHORS.txt file)
-    #
-    # Permission is hereby granted, free of charge, to any person obtaining
-    # a copy of this software and associated documentation files (the
-    # "Software"), to deal in the Software without restriction, including
-    # without limitation the rights to use, copy, modify, merge, publish,
-    # distribute, sublicense, and/or sell copies of the Software, and to
-    # permit persons to whom the Software is furnished to do so, subject to
-    # the following conditions:
-    #
-    # The above copyright notice and this permission notice shall be
-    # included in all copies or substantial portions of the Software.
-    #
-    # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-    # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-    # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-    # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-    # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-    # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-    # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-    path = None
-
-    def __init__(self, cleanup=True):
-        self._cleanup = cleanup
-
-    def __enter__(self):
-        self.path = mkdtemp(prefix='pep517-build-env-')
-        log.info('Temporary build environment: %s', self.path)
-
-        self.save_path = os.environ.get('PATH', None)
-        self.save_pythonpath = os.environ.get('PYTHONPATH', None)
-
-        install_scheme = 'nt' if (os.name == 'nt') else 'posix_prefix'
-        install_dirs = get_paths(install_scheme, vars={
-            'base': self.path,
-            'platbase': self.path,
-        })
-
-        scripts = install_dirs['scripts']
-        if self.save_path:
-            os.environ['PATH'] = scripts + os.pathsep + self.save_path
-        else:
-            os.environ['PATH'] = scripts + os.pathsep + os.defpath
-
-        if install_dirs['purelib'] == install_dirs['platlib']:
-            lib_dirs = install_dirs['purelib']
-        else:
-            lib_dirs = install_dirs['purelib'] + os.pathsep + \
-                install_dirs['platlib']
-        if self.save_pythonpath:
-            os.environ['PYTHONPATH'] = lib_dirs + os.pathsep + \
-                self.save_pythonpath
-        else:
-            os.environ['PYTHONPATH'] = lib_dirs
-
-        return self
-
-    def pip_install(self, reqs):
-        """Install dependencies into this env by calling pip in a subprocess"""
-        if not reqs:
-            return
-        log.info('Calling pip to install %s', reqs)
-        check_call([
-            sys.executable, '-m', 'pip', 'install', '--ignore-installed',
-            '--prefix', self.path] + list(reqs))
-
-    def __exit__(self, exc_type, exc_val, exc_tb):
-        needs_cleanup = (
-            self._cleanup and
-            self.path is not None and
-            os.path.isdir(self.path)
-        )
-        if needs_cleanup:
-            shutil.rmtree(self.path)
-
-        if self.save_path is None:
-            os.environ.pop('PATH', None)
-        else:
-            os.environ['PATH'] = self.save_path
-
-        if self.save_pythonpath is None:
-            os.environ.pop('PYTHONPATH', None)
-        else:
-            os.environ['PYTHONPATH'] = self.save_pythonpath
-
-
-def build_wheel(source_dir, wheel_dir, config_settings=None):
-    """Build a wheel from a source directory using PEP 517 hooks.
-
-    :param str source_dir: Source directory containing pyproject.toml
-    :param str wheel_dir: Target directory to create wheel in
-    :param dict config_settings: Options to pass to build backend
-
-    This is a blocking function which will run pip in a subprocess to install
-    build requirements.
-    """
-    if config_settings is None:
-        config_settings = {}
-    requires, backend = _load_pyproject(source_dir)
-    hooks = Pep517HookCaller(source_dir, backend)
-
-    with BuildEnvironment() as env:
-        env.pip_install(requires)
-        reqs = hooks.get_requires_for_build_wheel(config_settings)
-        env.pip_install(reqs)
-        return hooks.build_wheel(wheel_dir, config_settings)
-
-
-def build_sdist(source_dir, sdist_dir, config_settings=None):
-    """Build an sdist from a source directory using PEP 517 hooks.
-
-    :param str source_dir: Source directory containing pyproject.toml
-    :param str sdist_dir: Target directory to place sdist in
-    :param dict config_settings: Options to pass to build backend
-
-    This is a blocking function which will run pip in a subprocess to install
-    build requirements.
-    """
-    if config_settings is None:
-        config_settings = {}
-    requires, backend = _load_pyproject(source_dir)
-    hooks = Pep517HookCaller(source_dir, backend)
-
-    with BuildEnvironment() as env:
-        env.pip_install(requires)
-        reqs = hooks.get_requires_for_build_sdist(config_settings)
-        env.pip_install(reqs)
-        return hooks.build_sdist(sdist_dir, config_settings)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pep517/wrappers.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pep517/wrappers.py
deleted file mode 100644
index b14b899..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pep517/wrappers.py
+++ /dev/null
@@ -1,163 +0,0 @@
-from contextlib import contextmanager
-import os
-from os.path import dirname, abspath, join as pjoin
-import shutil
-from subprocess import check_call
-import sys
-from tempfile import mkdtemp
-
-from . import compat
-
-_in_proc_script = pjoin(dirname(abspath(__file__)), '_in_process.py')
-
-
-@contextmanager
-def tempdir():
-    td = mkdtemp()
-    try:
-        yield td
-    finally:
-        shutil.rmtree(td)
-
-
-class BackendUnavailable(Exception):
-    """Will be raised if the backend cannot be imported in the hook process."""
-
-
-class UnsupportedOperation(Exception):
-    """May be raised by build_sdist if the backend indicates that it can't."""
-
-
-def default_subprocess_runner(cmd, cwd=None, extra_environ=None):
-    """The default method of calling the wrapper subprocess."""
-    env = os.environ.copy()
-    if extra_environ:
-        env.update(extra_environ)
-
-    check_call(cmd, cwd=cwd, env=env)
-
-
-class Pep517HookCaller(object):
-    """A wrapper around a source directory to be built with a PEP 517 backend.
-
-    source_dir : The path to the source directory, containing pyproject.toml.
-    backend : The build backend spec, as per PEP 517, from pyproject.toml.
-    """
-    def __init__(self, source_dir, build_backend):
-        self.source_dir = abspath(source_dir)
-        self.build_backend = build_backend
-        self._subprocess_runner = default_subprocess_runner
-
-    # TODO: Is this over-engineered? Maybe frontends only need to
-    #       set this when creating the wrapper, not on every call.
-    @contextmanager
-    def subprocess_runner(self, runner):
-        prev = self._subprocess_runner
-        self._subprocess_runner = runner
-        yield
-        self._subprocess_runner = prev
-
-    def get_requires_for_build_wheel(self, config_settings=None):
-        """Identify packages required for building a wheel
-
-        Returns a list of dependency specifications, e.g.:
-            ["wheel >= 0.25", "setuptools"]
-
-        This does not include requirements specified in pyproject.toml.
-        It returns the result of calling the equivalently named hook in a
-        subprocess.
-        """
-        return self._call_hook('get_requires_for_build_wheel', {
-            'config_settings': config_settings
-        })
-
-    def prepare_metadata_for_build_wheel(
-            self, metadata_directory, config_settings=None):
-        """Prepare a *.dist-info folder with metadata for this project.
-
-        Returns the name of the newly created folder.
-
-        If the build backend defines a hook with this name, it will be called
-        in a subprocess. If not, the backend will be asked to build a wheel,
-        and the dist-info extracted from that.
-        """
-        return self._call_hook('prepare_metadata_for_build_wheel', {
-            'metadata_directory': abspath(metadata_directory),
-            'config_settings': config_settings,
-        })
-
-    def build_wheel(
-            self, wheel_directory, config_settings=None,
-            metadata_directory=None):
-        """Build a wheel from this project.
-
-        Returns the name of the newly created file.
-
-        In general, this will call the 'build_wheel' hook in the backend.
-        However, if that was previously called by
-        'prepare_metadata_for_build_wheel', and the same metadata_directory is
-        used, the previously built wheel will be copied to wheel_directory.
-        """
-        if metadata_directory is not None:
-            metadata_directory = abspath(metadata_directory)
-        return self._call_hook('build_wheel', {
-            'wheel_directory': abspath(wheel_directory),
-            'config_settings': config_settings,
-            'metadata_directory': metadata_directory,
-        })
-
-    def get_requires_for_build_sdist(self, config_settings=None):
-        """Identify packages required for building a wheel
-
-        Returns a list of dependency specifications, e.g.:
-            ["setuptools >= 26"]
-
-        This does not include requirements specified in pyproject.toml.
-        It returns the result of calling the equivalently named hook in a
-        subprocess.
-        """
-        return self._call_hook('get_requires_for_build_sdist', {
-            'config_settings': config_settings
-        })
-
-    def build_sdist(self, sdist_directory, config_settings=None):
-        """Build an sdist from this project.
-
-        Returns the name of the newly created file.
-
-        This calls the 'build_sdist' backend hook in a subprocess.
-        """
-        return self._call_hook('build_sdist', {
-            'sdist_directory': abspath(sdist_directory),
-            'config_settings': config_settings,
-        })
-
-    def _call_hook(self, hook_name, kwargs):
-        # On Python 2, pytoml returns Unicode values (which is correct) but the
-        # environment passed to check_call needs to contain string values. We
-        # convert here by encoding using ASCII (the backend can only contain
-        # letters, digits and _, . and : characters, and will be used as a
-        # Python identifier, so non-ASCII content is wrong on Python 2 in
-        # any case).
-        if sys.version_info[0] == 2:
-            build_backend = self.build_backend.encode('ASCII')
-        else:
-            build_backend = self.build_backend
-
-        with tempdir() as td:
-            compat.write_json({'kwargs': kwargs}, pjoin(td, 'input.json'),
-                              indent=2)
-
-            # Run the hook in a subprocess
-            self._subprocess_runner(
-                [sys.executable, _in_proc_script, hook_name, td],
-                cwd=self.source_dir,
-                extra_environ={'PEP517_BUILD_BACKEND': build_backend}
-            )
-
-            data = compat.read_json(pjoin(td, 'output.json'))
-            if data.get('unsupported'):
-                raise UnsupportedOperation
-            if data.get('no_backend'):
-                raise BackendUnavailable
-            return data['return_val']
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pkg_resources/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pkg_resources/__init__.py
deleted file mode 100644
index 9c4fd8e..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pkg_resources/__init__.py
+++ /dev/null
@@ -1,3171 +0,0 @@
-# coding: utf-8
-"""
-Package resource API
---------------------
-
-A resource is a logical file contained within a package, or a logical
-subdirectory thereof.  The package resource API expects resource names
-to have their path parts separated with ``/``, *not* whatever the local
-path separator is.  Do not use os.path operations to manipulate resource
-names being passed into the API.
-
-The package resource API is designed to work with normal filesystem packages,
-.egg files, and unpacked .egg files.  It can also work in a limited way with
-.zip files and with custom PEP 302 loaders that support the ``get_data()``
-method.
-"""
-
-from __future__ import absolute_import
-
-import sys
-import os
-import io
-import time
-import re
-import types
-import zipfile
-import zipimport
-import warnings
-import stat
-import functools
-import pkgutil
-import operator
-import platform
-import collections
-import plistlib
-import email.parser
-import errno
-import tempfile
-import textwrap
-import itertools
-import inspect
-from pkgutil import get_importer
-
-try:
-    import _imp
-except ImportError:
-    # Python 3.2 compatibility
-    import imp as _imp
-
-try:
-    FileExistsError
-except NameError:
-    FileExistsError = OSError
-
-from pip._vendor import six
-from pip._vendor.six.moves import urllib, map, filter
-
-# capture these to bypass sandboxing
-from os import utime
-try:
-    from os import mkdir, rename, unlink
-    WRITE_SUPPORT = True
-except ImportError:
-    # no write support, probably under GAE
-    WRITE_SUPPORT = False
-
-from os import open as os_open
-from os.path import isdir, split
-
-try:
-    import importlib.machinery as importlib_machinery
-    # access attribute to force import under delayed import mechanisms.
-    importlib_machinery.__name__
-except ImportError:
-    importlib_machinery = None
-
-from . import py31compat
-from pip._vendor import appdirs
-from pip._vendor import packaging
-__import__('pip._vendor.packaging.version')
-__import__('pip._vendor.packaging.specifiers')
-__import__('pip._vendor.packaging.requirements')
-__import__('pip._vendor.packaging.markers')
-
-
-__metaclass__ = type
-
-
-if (3, 0) < sys.version_info < (3, 4):
-    raise RuntimeError("Python 3.4 or later is required")
-
-if six.PY2:
-    # Those builtin exceptions are only defined in Python 3
-    PermissionError = None
-    NotADirectoryError = None
-
-# declare some globals that will be defined later to
-# satisfy the linters.
-require = None
-working_set = None
-add_activation_listener = None
-resources_stream = None
-cleanup_resources = None
-resource_dir = None
-resource_stream = None
-set_extraction_path = None
-resource_isdir = None
-resource_string = None
-iter_entry_points = None
-resource_listdir = None
-resource_filename = None
-resource_exists = None
-_distribution_finders = None
-_namespace_handlers = None
-_namespace_packages = None
-
-
-class PEP440Warning(RuntimeWarning):
-    """
-    Used when there is an issue with a version or specifier not complying with
-    PEP 440.
-    """
-
-
-def parse_version(v):
-    try:
-        return packaging.version.Version(v)
-    except packaging.version.InvalidVersion:
-        return packaging.version.LegacyVersion(v)
-
-
-_state_vars = {}
-
-
-def _declare_state(vartype, **kw):
-    globals().update(kw)
-    _state_vars.update(dict.fromkeys(kw, vartype))
-
-
-def __getstate__():
-    state = {}
-    g = globals()
-    for k, v in _state_vars.items():
-        state[k] = g['_sget_' + v](g[k])
-    return state
-
-
-def __setstate__(state):
-    g = globals()
-    for k, v in state.items():
-        g['_sset_' + _state_vars[k]](k, g[k], v)
-    return state
-
-
-def _sget_dict(val):
-    return val.copy()
-
-
-def _sset_dict(key, ob, state):
-    ob.clear()
-    ob.update(state)
-
-
-def _sget_object(val):
-    return val.__getstate__()
-
-
-def _sset_object(key, ob, state):
-    ob.__setstate__(state)
-
-
-_sget_none = _sset_none = lambda *args: None
-
-
-def get_supported_platform():
-    """Return this platform's maximum compatible version.
-
-    distutils.util.get_platform() normally reports the minimum version
-    of Mac OS X that would be required to *use* extensions produced by
-    distutils.  But what we want when checking compatibility is to know the
-    version of Mac OS X that we are *running*.  To allow usage of packages that
-    explicitly require a newer version of Mac OS X, we must also know the
-    current version of the OS.
-
-    If this condition occurs for any other platform with a version in its
-    platform strings, this function should be extended accordingly.
-    """
-    plat = get_build_platform()
-    m = macosVersionString.match(plat)
-    if m is not None and sys.platform == "darwin":
-        try:
-            plat = 'macosx-%s-%s' % ('.'.join(_macosx_vers()[:2]), m.group(3))
-        except ValueError:
-            # not Mac OS X
-            pass
-    return plat
-
-
-__all__ = [
-    # Basic resource access and distribution/entry point discovery
-    'require', 'run_script', 'get_provider', 'get_distribution',
-    'load_entry_point', 'get_entry_map', 'get_entry_info',
-    'iter_entry_points',
-    'resource_string', 'resource_stream', 'resource_filename',
-    'resource_listdir', 'resource_exists', 'resource_isdir',
-
-    # Environmental control
-    'declare_namespace', 'working_set', 'add_activation_listener',
-    'find_distributions', 'set_extraction_path', 'cleanup_resources',
-    'get_default_cache',
-
-    # Primary implementation classes
-    'Environment', 'WorkingSet', 'ResourceManager',
-    'Distribution', 'Requirement', 'EntryPoint',
-
-    # Exceptions
-    'ResolutionError', 'VersionConflict', 'DistributionNotFound',
-    'UnknownExtra', 'ExtractionError',
-
-    # Warnings
-    'PEP440Warning',
-
-    # Parsing functions and string utilities
-    'parse_requirements', 'parse_version', 'safe_name', 'safe_version',
-    'get_platform', 'compatible_platforms', 'yield_lines', 'split_sections',
-    'safe_extra', 'to_filename', 'invalid_marker', 'evaluate_marker',
-
-    # filesystem utilities
-    'ensure_directory', 'normalize_path',
-
-    # Distribution "precedence" constants
-    'EGG_DIST', 'BINARY_DIST', 'SOURCE_DIST', 'CHECKOUT_DIST', 'DEVELOP_DIST',
-
-    # "Provider" interfaces, implementations, and registration/lookup APIs
-    'IMetadataProvider', 'IResourceProvider', 'FileMetadata',
-    'PathMetadata', 'EggMetadata', 'EmptyProvider', 'empty_provider',
-    'NullProvider', 'EggProvider', 'DefaultProvider', 'ZipProvider',
-    'register_finder', 'register_namespace_handler', 'register_loader_type',
-    'fixup_namespace_packages', 'get_importer',
-
-    # Warnings
-    'PkgResourcesDeprecationWarning',
-
-    # Deprecated/backward compatibility only
-    'run_main', 'AvailableDistributions',
-]
-
-
-class ResolutionError(Exception):
-    """Abstract base for dependency resolution errors"""
-
-    def __repr__(self):
-        return self.__class__.__name__ + repr(self.args)
-
-
-class VersionConflict(ResolutionError):
-    """
-    An already-installed version conflicts with the requested version.
-
-    Should be initialized with the installed Distribution and the requested
-    Requirement.
-    """
-
-    _template = "{self.dist} is installed but {self.req} is required"
-
-    @property
-    def dist(self):
-        return self.args[0]
-
-    @property
-    def req(self):
-        return self.args[1]
-
-    def report(self):
-        return self._template.format(**locals())
-
-    def with_context(self, required_by):
-        """
-        If required_by is non-empty, return a version of self that is a
-        ContextualVersionConflict.
-        """
-        if not required_by:
-            return self
-        args = self.args + (required_by,)
-        return ContextualVersionConflict(*args)
-
-
-class ContextualVersionConflict(VersionConflict):
-    """
-    A VersionConflict that accepts a third parameter, the set of the
-    requirements that required the installed Distribution.
-    """
-
-    _template = VersionConflict._template + ' by {self.required_by}'
-
-    @property
-    def required_by(self):
-        return self.args[2]
-
-
-class DistributionNotFound(ResolutionError):
-    """A requested distribution was not found"""
-
-    _template = ("The '{self.req}' distribution was not found "
-                 "and is required by {self.requirers_str}")
-
-    @property
-    def req(self):
-        return self.args[0]
-
-    @property
-    def requirers(self):
-        return self.args[1]
-
-    @property
-    def requirers_str(self):
-        if not self.requirers:
-            return 'the application'
-        return ', '.join(self.requirers)
-
-    def report(self):
-        return self._template.format(**locals())
-
-    def __str__(self):
-        return self.report()
-
-
-class UnknownExtra(ResolutionError):
-    """Distribution doesn't have an "extra feature" of the given name"""
-
-
-_provider_factories = {}
-
-PY_MAJOR = sys.version[:3]
-EGG_DIST = 3
-BINARY_DIST = 2
-SOURCE_DIST = 1
-CHECKOUT_DIST = 0
-DEVELOP_DIST = -1
-
-
-def register_loader_type(loader_type, provider_factory):
-    """Register `provider_factory` to make providers for `loader_type`
-
-    `loader_type` is the type or class of a PEP 302 ``module.__loader__``,
-    and `provider_factory` is a function that, passed a *module* object,
-    returns an ``IResourceProvider`` for that module.
-    """
-    _provider_factories[loader_type] = provider_factory
-
-
-def get_provider(moduleOrReq):
-    """Return an IResourceProvider for the named module or requirement"""
-    if isinstance(moduleOrReq, Requirement):
-        return working_set.find(moduleOrReq) or require(str(moduleOrReq))[0]
-    try:
-        module = sys.modules[moduleOrReq]
-    except KeyError:
-        __import__(moduleOrReq)
-        module = sys.modules[moduleOrReq]
-    loader = getattr(module, '__loader__', None)
-    return _find_adapter(_provider_factories, loader)(module)
-
-
-def _macosx_vers(_cache=[]):
-    if not _cache:
-        version = platform.mac_ver()[0]
-        # fallback for MacPorts
-        if version == '':
-            plist = '/System/Library/CoreServices/SystemVersion.plist'
-            if os.path.exists(plist):
-                if hasattr(plistlib, 'readPlist'):
-                    plist_content = plistlib.readPlist(plist)
-                    if 'ProductVersion' in plist_content:
-                        version = plist_content['ProductVersion']
-
-        _cache.append(version.split('.'))
-    return _cache[0]
-
-
-def _macosx_arch(machine):
-    return {'PowerPC': 'ppc', 'Power_Macintosh': 'ppc'}.get(machine, machine)
-
-
-def get_build_platform():
-    """Return this platform's string for platform-specific distributions
-
-    XXX Currently this is the same as ``distutils.util.get_platform()``, but it
-    needs some hacks for Linux and Mac OS X.
-    """
-    from sysconfig import get_platform
-
-    plat = get_platform()
-    if sys.platform == "darwin" and not plat.startswith('macosx-'):
-        try:
-            version = _macosx_vers()
-            machine = os.uname()[4].replace(" ", "_")
-            return "macosx-%d.%d-%s" % (
-                int(version[0]), int(version[1]),
-                _macosx_arch(machine),
-            )
-        except ValueError:
-            # if someone is running a non-Mac darwin system, this will fall
-            # through to the default implementation
-            pass
-    return plat
-
-
-macosVersionString = re.compile(r"macosx-(\d+)\.(\d+)-(.*)")
-darwinVersionString = re.compile(r"darwin-(\d+)\.(\d+)\.(\d+)-(.*)")
-# XXX backward compat
-get_platform = get_build_platform
-
-
-def compatible_platforms(provided, required):
-    """Can code for the `provided` platform run on the `required` platform?
-
-    Returns true if either platform is ``None``, or the platforms are equal.
-
-    XXX Needs compatibility checks for Linux and other unixy OSes.
-    """
-    if provided is None or required is None or provided == required:
-        # easy case
-        return True
-
-    # Mac OS X special cases
-    reqMac = macosVersionString.match(required)
-    if reqMac:
-        provMac = macosVersionString.match(provided)
-
-        # is this a Mac package?
-        if not provMac:
-            # this is backwards compatibility for packages built before
-            # setuptools 0.6. All packages built after this point will
-            # use the new macosx designation.
-            provDarwin = darwinVersionString.match(provided)
-            if provDarwin:
-                dversion = int(provDarwin.group(1))
-                macosversion = "%s.%s" % (reqMac.group(1), reqMac.group(2))
-                if dversion == 7 and macosversion >= "10.3" or \
-                        dversion == 8 and macosversion >= "10.4":
-                    return True
-            # egg isn't macosx or legacy darwin
-            return False
-
-        # are they the same major version and machine type?
-        if provMac.group(1) != reqMac.group(1) or \
-                provMac.group(3) != reqMac.group(3):
-            return False
-
-        # is the required OS major update >= the provided one?
-        if int(provMac.group(2)) > int(reqMac.group(2)):
-            return False
-
-        return True
-
-    # XXX Linux and other platforms' special cases should go here
-    return False
-
-
-def run_script(dist_spec, script_name):
-    """Locate distribution `dist_spec` and run its `script_name` script"""
-    ns = sys._getframe(1).f_globals
-    name = ns['__name__']
-    ns.clear()
-    ns['__name__'] = name
-    require(dist_spec)[0].run_script(script_name, ns)
-
-
-# backward compatibility
-run_main = run_script
-
-
-def get_distribution(dist):
-    """Return a current distribution object for a Requirement or string"""
-    if isinstance(dist, six.string_types):
-        dist = Requirement.parse(dist)
-    if isinstance(dist, Requirement):
-        dist = get_provider(dist)
-    if not isinstance(dist, Distribution):
-        raise TypeError("Expected string, Requirement, or Distribution", dist)
-    return dist
-
-
-def load_entry_point(dist, group, name):
-    """Return `name` entry point of `group` for `dist` or raise ImportError"""
-    return get_distribution(dist).load_entry_point(group, name)
-
-
-def get_entry_map(dist, group=None):
-    """Return the entry point map for `group`, or the full entry map"""
-    return get_distribution(dist).get_entry_map(group)
-
-
-def get_entry_info(dist, group, name):
-    """Return the EntryPoint object for `group`+`name`, or ``None``"""
-    return get_distribution(dist).get_entry_info(group, name)
-
-
-class IMetadataProvider:
-    def has_metadata(name):
-        """Does the package's distribution contain the named metadata?"""
-
-    def get_metadata(name):
-        """The named metadata resource as a string"""
-
-    def get_metadata_lines(name):
-        """Yield named metadata resource as list of non-blank non-comment lines
-
-       Leading and trailing whitespace is stripped from each line, and lines
-       with ``#`` as the first non-blank character are omitted."""
-
-    def metadata_isdir(name):
-        """Is the named metadata a directory?  (like ``os.path.isdir()``)"""
-
-    def metadata_listdir(name):
-        """List of metadata names in the directory (like ``os.listdir()``)"""
-
-    def run_script(script_name, namespace):
-        """Execute the named script in the supplied namespace dictionary"""
-
-
-class IResourceProvider(IMetadataProvider):
-    """An object that provides access to package resources"""
-
-    def get_resource_filename(manager, resource_name):
-        """Return a true filesystem path for `resource_name`
-
-        `manager` must be an ``IResourceManager``"""
-
-    def get_resource_stream(manager, resource_name):
-        """Return a readable file-like object for `resource_name`
-
-        `manager` must be an ``IResourceManager``"""
-
-    def get_resource_string(manager, resource_name):
-        """Return a string containing the contents of `resource_name`
-
-        `manager` must be an ``IResourceManager``"""
-
-    def has_resource(resource_name):
-        """Does the package contain the named resource?"""
-
-    def resource_isdir(resource_name):
-        """Is the named resource a directory?  (like ``os.path.isdir()``)"""
-
-    def resource_listdir(resource_name):
-        """List of resource names in the directory (like ``os.listdir()``)"""
-
-
-class WorkingSet:
-    """A collection of active distributions on sys.path (or a similar list)"""
-
-    def __init__(self, entries=None):
-        """Create working set from list of path entries (default=sys.path)"""
-        self.entries = []
-        self.entry_keys = {}
-        self.by_key = {}
-        self.callbacks = []
-
-        if entries is None:
-            entries = sys.path
-
-        for entry in entries:
-            self.add_entry(entry)
-
-    @classmethod
-    def _build_master(cls):
-        """
-        Prepare the master working set.
-        """
-        ws = cls()
-        try:
-            from __main__ import __requires__
-        except ImportError:
-            # The main program does not list any requirements
-            return ws
-
-        # ensure the requirements are met
-        try:
-            ws.require(__requires__)
-        except VersionConflict:
-            return cls._build_from_requirements(__requires__)
-
-        return ws
-
-    @classmethod
-    def _build_from_requirements(cls, req_spec):
-        """
-        Build a working set from a requirement spec. Rewrites sys.path.
-        """
-        # try it without defaults already on sys.path
-        # by starting with an empty path
-        ws = cls([])
-        reqs = parse_requirements(req_spec)
-        dists = ws.resolve(reqs, Environment())
-        for dist in dists:
-            ws.add(dist)
-
-        # add any missing entries from sys.path
-        for entry in sys.path:
-            if entry not in ws.entries:
-                ws.add_entry(entry)
-
-        # then copy back to sys.path
-        sys.path[:] = ws.entries
-        return ws
-
-    def add_entry(self, entry):
-        """Add a path item to ``.entries``, finding any distributions on it
-
-        ``find_distributions(entry, True)`` is used to find distributions
-        corresponding to the path entry, and they are added.  `entry` is
-        always appended to ``.entries``, even if it is already present.
-        (This is because ``sys.path`` can contain the same value more than
-        once, and the ``.entries`` of the ``sys.path`` WorkingSet should always
-        equal ``sys.path``.)
-        """
-        self.entry_keys.setdefault(entry, [])
-        self.entries.append(entry)
-        for dist in find_distributions(entry, True):
-            self.add(dist, entry, False)
-
-    def __contains__(self, dist):
-        """True if `dist` is the active distribution for its project"""
-        return self.by_key.get(dist.key) == dist
-
-    def find(self, req):
-        """Find a distribution matching requirement `req`
-
-        If there is an active distribution for the requested project, this
-        returns it as long as it meets the version requirement specified by
-        `req`.  But, if there is an active distribution for the project and it
-        does *not* meet the `req` requirement, ``VersionConflict`` is raised.
-        If there is no active distribution for the requested project, ``None``
-        is returned.
-        """
-        dist = self.by_key.get(req.key)
-        if dist is not None and dist not in req:
-            # XXX add more info
-            raise VersionConflict(dist, req)
-        return dist
-
-    def iter_entry_points(self, group, name=None):
-        """Yield entry point objects from `group` matching `name`
-
-        If `name` is None, yields all entry points in `group` from all
-        distributions in the working set, otherwise only ones matching
-        both `group` and `name` are yielded (in distribution order).
-        """
-        return (
-            entry
-            for dist in self
-            for entry in dist.get_entry_map(group).values()
-            if name is None or name == entry.name
-        )
-
-    def run_script(self, requires, script_name):
-        """Locate distribution for `requires` and run `script_name` script"""
-        ns = sys._getframe(1).f_globals
-        name = ns['__name__']
-        ns.clear()
-        ns['__name__'] = name
-        self.require(requires)[0].run_script(script_name, ns)
-
-    def __iter__(self):
-        """Yield distributions for non-duplicate projects in the working set
-
-        The yield order is the order in which the items' path entries were
-        added to the working set.
-        """
-        seen = {}
-        for item in self.entries:
-            if item not in self.entry_keys:
-                # workaround a cache issue
-                continue
-
-            for key in self.entry_keys[item]:
-                if key not in seen:
-                    seen[key] = 1
-                    yield self.by_key[key]
-
-    def add(self, dist, entry=None, insert=True, replace=False):
-        """Add `dist` to working set, associated with `entry`
-
-        If `entry` is unspecified, it defaults to the ``.location`` of `dist`.
-        On exit from this routine, `entry` is added to the end of the working
-        set's ``.entries`` (if it wasn't already present).
-
-        `dist` is only added to the working set if it's for a project that
-        doesn't already have a distribution in the set, unless `replace=True`.
-        If it's added, any callbacks registered with the ``subscribe()`` method
-        will be called.
-        """
-        if insert:
-            dist.insert_on(self.entries, entry, replace=replace)
-
-        if entry is None:
-            entry = dist.location
-        keys = self.entry_keys.setdefault(entry, [])
-        keys2 = self.entry_keys.setdefault(dist.location, [])
-        if not replace and dist.key in self.by_key:
-            # ignore hidden distros
-            return
-
-        self.by_key[dist.key] = dist
-        if dist.key not in keys:
-            keys.append(dist.key)
-        if dist.key not in keys2:
-            keys2.append(dist.key)
-        self._added_new(dist)
-
-    def resolve(self, requirements, env=None, installer=None,
-                replace_conflicting=False, extras=None):
-        """List all distributions needed to (recursively) meet `requirements`
-
-        `requirements` must be a sequence of ``Requirement`` objects.  `env`,
-        if supplied, should be an ``Environment`` instance.  If
-        not supplied, it defaults to all distributions available within any
-        entry or distribution in the working set.  `installer`, if supplied,
-        will be invoked with each requirement that cannot be met by an
-        already-installed distribution; it should return a ``Distribution`` or
-        ``None``.
-
-        Unless `replace_conflicting=True`, raises a VersionConflict exception
-        if
-        any requirements are found on the path that have the correct name but
-        the wrong version.  Otherwise, if an `installer` is supplied it will be
-        invoked to obtain the correct version of the requirement and activate
-        it.
-
-        `extras` is a list of the extras to be used with these requirements.
-        This is important because extra requirements may look like `my_req;
-        extra = "my_extra"`, which would otherwise be interpreted as a purely
-        optional requirement.  Instead, we want to be able to assert that these
-        requirements are truly required.
-        """
-
-        # set up the stack
-        requirements = list(requirements)[::-1]
-        # set of processed requirements
-        processed = {}
-        # key -> dist
-        best = {}
-        to_activate = []
-
-        req_extras = _ReqExtras()
-
-        # Mapping of requirement to set of distributions that required it;
-        # useful for reporting info about conflicts.
-        required_by = collections.defaultdict(set)
-
-        while requirements:
-            # process dependencies breadth-first
-            req = requirements.pop(0)
-            if req in processed:
-                # Ignore cyclic or redundant dependencies
-                continue
-
-            if not req_extras.markers_pass(req, extras):
-                continue
-
-            dist = best.get(req.key)
-            if dist is None:
-                # Find the best distribution and add it to the map
-                dist = self.by_key.get(req.key)
-                if dist is None or (dist not in req and replace_conflicting):
-                    ws = self
-                    if env is None:
-                        if dist is None:
-                            env = Environment(self.entries)
-                        else:
-                            # Use an empty environment and workingset to avoid
-                            # any further conflicts with the conflicting
-                            # distribution
-                            env = Environment([])
-                            ws = WorkingSet([])
-                    dist = best[req.key] = env.best_match(
-                        req, ws, installer,
-                        replace_conflicting=replace_conflicting
-                    )
-                    if dist is None:
-                        requirers = required_by.get(req, None)
-                        raise DistributionNotFound(req, requirers)
-                to_activate.append(dist)
-            if dist not in req:
-                # Oops, the "best" so far conflicts with a dependency
-                dependent_req = required_by[req]
-                raise VersionConflict(dist, req).with_context(dependent_req)
-
-            # push the new requirements onto the stack
-            new_requirements = dist.requires(req.extras)[::-1]
-            requirements.extend(new_requirements)
-
-            # Register the new requirements needed by req
-            for new_requirement in new_requirements:
-                required_by[new_requirement].add(req.project_name)
-                req_extras[new_requirement] = req.extras
-
-            processed[req] = True
-
-        # return list of distros to activate
-        return to_activate
-
-    def find_plugins(
-            self, plugin_env, full_env=None, installer=None, fallback=True):
-        """Find all activatable distributions in `plugin_env`
-
-        Example usage::
-
-            distributions, errors = working_set.find_plugins(
-                Environment(plugin_dirlist)
-            )
-            # add plugins+libs to sys.path
-            map(working_set.add, distributions)
-            # display errors
-            print('Could not load', errors)
-
-        The `plugin_env` should be an ``Environment`` instance that contains
-        only distributions that are in the project's "plugin directory" or
-        directories. The `full_env`, if supplied, should be an ``Environment``
-        contains all currently-available distributions.  If `full_env` is not
-        supplied, one is created automatically from the ``WorkingSet`` this
-        method is called on, which will typically mean that every directory on
-        ``sys.path`` will be scanned for distributions.
-
-        `installer` is a standard installer callback as used by the
-        ``resolve()`` method. The `fallback` flag indicates whether we should
-        attempt to resolve older versions of a plugin if the newest version
-        cannot be resolved.
-
-        This method returns a 2-tuple: (`distributions`, `error_info`), where
-        `distributions` is a list of the distributions found in `plugin_env`
-        that were loadable, along with any other distributions that are needed
-        to resolve their dependencies.  `error_info` is a dictionary mapping
-        unloadable plugin distributions to an exception instance describing the
-        error that occurred. Usually this will be a ``DistributionNotFound`` or
-        ``VersionConflict`` instance.
-        """
-
-        plugin_projects = list(plugin_env)
-        # scan project names in alphabetic order
-        plugin_projects.sort()
-
-        error_info = {}
-        distributions = {}
-
-        if full_env is None:
-            env = Environment(self.entries)
-            env += plugin_env
-        else:
-            env = full_env + plugin_env
-
-        shadow_set = self.__class__([])
-        # put all our entries in shadow_set
-        list(map(shadow_set.add, self))
-
-        for project_name in plugin_projects:
-
-            for dist in plugin_env[project_name]:
-
-                req = [dist.as_requirement()]
-
-                try:
-                    resolvees = shadow_set.resolve(req, env, installer)
-
-                except ResolutionError as v:
-                    # save error info
-                    error_info[dist] = v
-                    if fallback:
-                        # try the next older version of project
-                        continue
-                    else:
-                        # give up on this project, keep going
-                        break
-
-                else:
-                    list(map(shadow_set.add, resolvees))
-                    distributions.update(dict.fromkeys(resolvees))
-
-                    # success, no need to try any more versions of this project
-                    break
-
-        distributions = list(distributions)
-        distributions.sort()
-
-        return distributions, error_info
-
-    def require(self, *requirements):
-        """Ensure that distributions matching `requirements` are activated
-
-        `requirements` must be a string or a (possibly-nested) sequence
-        thereof, specifying the distributions and versions required.  The
-        return value is a sequence of the distributions that needed to be
-        activated to fulfill the requirements; all relevant distributions are
-        included, even if they were already activated in this working set.
-        """
-        needed = self.resolve(parse_requirements(requirements))
-
-        for dist in needed:
-            self.add(dist)
-
-        return needed
-
-    def subscribe(self, callback, existing=True):
-        """Invoke `callback` for all distributions
-
-        If `existing=True` (default),
-        call on all existing ones, as well.
-        """
-        if callback in self.callbacks:
-            return
-        self.callbacks.append(callback)
-        if not existing:
-            return
-        for dist in self:
-            callback(dist)
-
-    def _added_new(self, dist):
-        for callback in self.callbacks:
-            callback(dist)
-
-    def __getstate__(self):
-        return (
-            self.entries[:], self.entry_keys.copy(), self.by_key.copy(),
-            self.callbacks[:]
-        )
-
-    def __setstate__(self, e_k_b_c):
-        entries, keys, by_key, callbacks = e_k_b_c
-        self.entries = entries[:]
-        self.entry_keys = keys.copy()
-        self.by_key = by_key.copy()
-        self.callbacks = callbacks[:]
-
-
-class _ReqExtras(dict):
-    """
-    Map each requirement to the extras that demanded it.
-    """
-
-    def markers_pass(self, req, extras=None):
-        """
-        Evaluate markers for req against each extra that
-        demanded it.
-
-        Return False if the req has a marker and fails
-        evaluation. Otherwise, return True.
-        """
-        extra_evals = (
-            req.marker.evaluate({'extra': extra})
-            for extra in self.get(req, ()) + (extras or (None,))
-        )
-        return not req.marker or any(extra_evals)
-
-
-class Environment:
-    """Searchable snapshot of distributions on a search path"""
-
-    def __init__(
-            self, search_path=None, platform=get_supported_platform(),
-            python=PY_MAJOR):
-        """Snapshot distributions available on a search path
-
-        Any distributions found on `search_path` are added to the environment.
-        `search_path` should be a sequence of ``sys.path`` items.  If not
-        supplied, ``sys.path`` is used.
-
-        `platform` is an optional string specifying the name of the platform
-        that platform-specific distributions must be compatible with.  If
-        unspecified, it defaults to the current platform.  `python` is an
-        optional string naming the desired version of Python (e.g. ``'3.6'``);
-        it defaults to the current version.
-
-        You may explicitly set `platform` (and/or `python`) to ``None`` if you
-        wish to map *all* distributions, not just those compatible with the
-        running platform or Python version.
-        """
-        self._distmap = {}
-        self.platform = platform
-        self.python = python
-        self.scan(search_path)
-
-    def can_add(self, dist):
-        """Is distribution `dist` acceptable for this environment?
-
-        The distribution must match the platform and python version
-        requirements specified when this environment was created, or False
-        is returned.
-        """
-        py_compat = (
-            self.python is None
-            or dist.py_version is None
-            or dist.py_version == self.python
-        )
-        return py_compat and compatible_platforms(dist.platform, self.platform)
-
-    def remove(self, dist):
-        """Remove `dist` from the environment"""
-        self._distmap[dist.key].remove(dist)
-
-    def scan(self, search_path=None):
-        """Scan `search_path` for distributions usable in this environment
-
-        Any distributions found are added to the environment.
-        `search_path` should be a sequence of ``sys.path`` items.  If not
-        supplied, ``sys.path`` is used.  Only distributions conforming to
-        the platform/python version defined at initialization are added.
-        """
-        if search_path is None:
-            search_path = sys.path
-
-        for item in search_path:
-            for dist in find_distributions(item):
-                self.add(dist)
-
-    def __getitem__(self, project_name):
-        """Return a newest-to-oldest list of distributions for `project_name`
-
-        Uses case-insensitive `project_name` comparison, assuming all the
-        project's distributions use their project's name converted to all
-        lowercase as their key.
-
-        """
-        distribution_key = project_name.lower()
-        return self._distmap.get(distribution_key, [])
-
-    def add(self, dist):
-        """Add `dist` if we ``can_add()`` it and it has not already been added
-        """
-        if self.can_add(dist) and dist.has_version():
-            dists = self._distmap.setdefault(dist.key, [])
-            if dist not in dists:
-                dists.append(dist)
-                dists.sort(key=operator.attrgetter('hashcmp'), reverse=True)
-
-    def best_match(
-            self, req, working_set, installer=None, replace_conflicting=False):
-        """Find distribution best matching `req` and usable on `working_set`
-
-        This calls the ``find(req)`` method of the `working_set` to see if a
-        suitable distribution is already active.  (This may raise
-        ``VersionConflict`` if an unsuitable version of the project is already
-        active in the specified `working_set`.)  If a suitable distribution
-        isn't active, this method returns the newest distribution in the
-        environment that meets the ``Requirement`` in `req`.  If no suitable
-        distribution is found, and `installer` is supplied, then the result of
-        calling the environment's ``obtain(req, installer)`` method will be
-        returned.
-        """
-        try:
-            dist = working_set.find(req)
-        except VersionConflict:
-            if not replace_conflicting:
-                raise
-            dist = None
-        if dist is not None:
-            return dist
-        for dist in self[req.key]:
-            if dist in req:
-                return dist
-        # try to download/install
-        return self.obtain(req, installer)
-
-    def obtain(self, requirement, installer=None):
-        """Obtain a distribution matching `requirement` (e.g. via download)
-
-        Obtain a distro that matches requirement (e.g. via download).  In the
-        base ``Environment`` class, this routine just returns
-        ``installer(requirement)``, unless `installer` is None, in which case
-        None is returned instead.  This method is a hook that allows subclasses
-        to attempt other ways of obtaining a distribution before falling back
-        to the `installer` argument."""
-        if installer is not None:
-            return installer(requirement)
-
-    def __iter__(self):
-        """Yield the unique project names of the available distributions"""
-        for key in self._distmap.keys():
-            if self[key]:
-                yield key
-
-    def __iadd__(self, other):
-        """In-place addition of a distribution or environment"""
-        if isinstance(other, Distribution):
-            self.add(other)
-        elif isinstance(other, Environment):
-            for project in other:
-                for dist in other[project]:
-                    self.add(dist)
-        else:
-            raise TypeError("Can't add %r to environment" % (other,))
-        return self
-
-    def __add__(self, other):
-        """Add an environment or distribution to an environment"""
-        new = self.__class__([], platform=None, python=None)
-        for env in self, other:
-            new += env
-        return new
-
-
-# XXX backward compatibility
-AvailableDistributions = Environment
-
-
-class ExtractionError(RuntimeError):
-    """An error occurred extracting a resource
-
-    The following attributes are available from instances of this exception:
-
-    manager
-        The resource manager that raised this exception
-
-    cache_path
-        The base directory for resource extraction
-
-    original_error
-        The exception instance that caused extraction to fail
-    """
-
-
-class ResourceManager:
-    """Manage resource extraction and packages"""
-    extraction_path = None
-
-    def __init__(self):
-        self.cached_files = {}
-
-    def resource_exists(self, package_or_requirement, resource_name):
-        """Does the named resource exist?"""
-        return get_provider(package_or_requirement).has_resource(resource_name)
-
-    def resource_isdir(self, package_or_requirement, resource_name):
-        """Is the named resource an existing directory?"""
-        return get_provider(package_or_requirement).resource_isdir(
-            resource_name
-        )
-
-    def resource_filename(self, package_or_requirement, resource_name):
-        """Return a true filesystem path for specified resource"""
-        return get_provider(package_or_requirement).get_resource_filename(
-            self, resource_name
-        )
-
-    def resource_stream(self, package_or_requirement, resource_name):
-        """Return a readable file-like object for specified resource"""
-        return get_provider(package_or_requirement).get_resource_stream(
-            self, resource_name
-        )
-
-    def resource_string(self, package_or_requirement, resource_name):
-        """Return specified resource as a string"""
-        return get_provider(package_or_requirement).get_resource_string(
-            self, resource_name
-        )
-
-    def resource_listdir(self, package_or_requirement, resource_name):
-        """List the contents of the named resource directory"""
-        return get_provider(package_or_requirement).resource_listdir(
-            resource_name
-        )
-
-    def extraction_error(self):
-        """Give an error message for problems extracting file(s)"""
-
-        old_exc = sys.exc_info()[1]
-        cache_path = self.extraction_path or get_default_cache()
-
-        tmpl = textwrap.dedent("""
-            Can't extract file(s) to egg cache
-
-            The following error occurred while trying to extract file(s)
-            to the Python egg cache:
-
-              {old_exc}
-
-            The Python egg cache directory is currently set to:
-
-              {cache_path}
-
-            Perhaps your account does not have write access to this directory?
-            You can change the cache directory by setting the PYTHON_EGG_CACHE
-            environment variable to point to an accessible directory.
-            """).lstrip()
-        err = ExtractionError(tmpl.format(**locals()))
-        err.manager = self
-        err.cache_path = cache_path
-        err.original_error = old_exc
-        raise err
-
-    def get_cache_path(self, archive_name, names=()):
-        """Return absolute location in cache for `archive_name` and `names`
-
-        The parent directory of the resulting path will be created if it does
-        not already exist.  `archive_name` should be the base filename of the
-        enclosing egg (which may not be the name of the enclosing zipfile!),
-        including its ".egg" extension.  `names`, if provided, should be a
-        sequence of path name parts "under" the egg's extraction location.
-
-        This method should only be called by resource providers that need to
-        obtain an extraction location, and only for names they intend to
-        extract, as it tracks the generated names for possible cleanup later.
-        """
-        extract_path = self.extraction_path or get_default_cache()
-        target_path = os.path.join(extract_path, archive_name + '-tmp', *names)
-        try:
-            _bypass_ensure_directory(target_path)
-        except Exception:
-            self.extraction_error()
-
-        self._warn_unsafe_extraction_path(extract_path)
-
-        self.cached_files[target_path] = 1
-        return target_path
-
-    @staticmethod
-    def _warn_unsafe_extraction_path(path):
-        """
-        If the default extraction path is overridden and set to an insecure
-        location, such as /tmp, it opens up an opportunity for an attacker to
-        replace an extracted file with an unauthorized payload. Warn the user
-        if a known insecure location is used.
-
-        See Distribute #375 for more details.
-        """
-        if os.name == 'nt' and not path.startswith(os.environ['windir']):
-            # On Windows, permissions are generally restrictive by default
-            #  and temp directories are not writable by other users, so
-            #  bypass the warning.
-            return
-        mode = os.stat(path).st_mode
-        if mode & stat.S_IWOTH or mode & stat.S_IWGRP:
-            msg = (
-                "%s is writable by group/others and vulnerable to attack "
-                "when "
-                "used with get_resource_filename. Consider a more secure "
-                "location (set with .set_extraction_path or the "
-                "PYTHON_EGG_CACHE environment variable)." % path
-            )
-            warnings.warn(msg, UserWarning)
-
-    def postprocess(self, tempname, filename):
-        """Perform any platform-specific postprocessing of `tempname`
-
-        This is where Mac header rewrites should be done; other platforms don't
-        have anything special they should do.
-
-        Resource providers should call this method ONLY after successfully
-        extracting a compressed resource.  They must NOT call it on resources
-        that are already in the filesystem.
-
-        `tempname` is the current (temporary) name of the file, and `filename`
-        is the name it will be renamed to by the caller after this routine
-        returns.
-        """
-
-        if os.name == 'posix':
-            # Make the resource executable
-            mode = ((os.stat(tempname).st_mode) | 0o555) & 0o7777
-            os.chmod(tempname, mode)
-
-    def set_extraction_path(self, path):
-        """Set the base path where resources will be extracted to, if needed.
-
-        If you do not call this routine before any extractions take place, the
-        path defaults to the return value of ``get_default_cache()``.  (Which
-        is based on the ``PYTHON_EGG_CACHE`` environment variable, with various
-        platform-specific fallbacks.  See that routine's documentation for more
-        details.)
-
-        Resources are extracted to subdirectories of this path based upon
-        information given by the ``IResourceProvider``.  You may set this to a
-        temporary directory, but then you must call ``cleanup_resources()`` to
-        delete the extracted files when done.  There is no guarantee that
-        ``cleanup_resources()`` will be able to remove all extracted files.
-
-        (Note: you may not change the extraction path for a given resource
-        manager once resources have been extracted, unless you first call
-        ``cleanup_resources()``.)
-        """
-        if self.cached_files:
-            raise ValueError(
-                "Can't change extraction path, files already extracted"
-            )
-
-        self.extraction_path = path
-
-    def cleanup_resources(self, force=False):
-        """
-        Delete all extracted resource files and directories, returning a list
-        of the file and directory names that could not be successfully removed.
-        This function does not have any concurrency protection, so it should
-        generally only be called when the extraction path is a temporary
-        directory exclusive to a single process.  This method is not
-        automatically called; you must call it explicitly or register it as an
-        ``atexit`` function if you wish to ensure cleanup of a temporary
-        directory used for extractions.
-        """
-        # XXX
-
-
-def get_default_cache():
-    """
-    Return the ``PYTHON_EGG_CACHE`` environment variable
-    or a platform-relevant user cache dir for an app
-    named "Python-Eggs".
-    """
-    return (
-        os.environ.get('PYTHON_EGG_CACHE')
-        or appdirs.user_cache_dir(appname='Python-Eggs')
-    )
-
-
-def safe_name(name):
-    """Convert an arbitrary string to a standard distribution name
-
-    Any runs of non-alphanumeric/. characters are replaced with a single '-'.
-    """
-    return re.sub('[^A-Za-z0-9.]+', '-', name)
-
-
-def safe_version(version):
-    """
-    Convert an arbitrary string to a standard version string
-    """
-    try:
-        # normalize the version
-        return str(packaging.version.Version(version))
-    except packaging.version.InvalidVersion:
-        version = version.replace(' ', '.')
-        return re.sub('[^A-Za-z0-9.]+', '-', version)
-
-
-def safe_extra(extra):
-    """Convert an arbitrary string to a standard 'extra' name
-
-    Any runs of non-alphanumeric characters are replaced with a single '_',
-    and the result is always lowercased.
-    """
-    return re.sub('[^A-Za-z0-9.-]+', '_', extra).lower()
-
-
-def to_filename(name):
-    """Convert a project or version name to its filename-escaped form
-
-    Any '-' characters are currently replaced with '_'.
-    """
-    return name.replace('-', '_')
-
-
-def invalid_marker(text):
-    """
-    Validate text as a PEP 508 environment marker; return an exception
-    if invalid or False otherwise.
-    """
-    try:
-        evaluate_marker(text)
-    except SyntaxError as e:
-        e.filename = None
-        e.lineno = None
-        return e
-    return False
-
-
-def evaluate_marker(text, extra=None):
-    """
-    Evaluate a PEP 508 environment marker.
-    Return a boolean indicating the marker result in this environment.
-    Raise SyntaxError if marker is invalid.
-
-    This implementation uses the 'pyparsing' module.
-    """
-    try:
-        marker = packaging.markers.Marker(text)
-        return marker.evaluate()
-    except packaging.markers.InvalidMarker as e:
-        raise SyntaxError(e)
-
-
-class NullProvider:
-    """Try to implement resources and metadata for arbitrary PEP 302 loaders"""
-
-    egg_name = None
-    egg_info = None
-    loader = None
-
-    def __init__(self, module):
-        self.loader = getattr(module, '__loader__', None)
-        self.module_path = os.path.dirname(getattr(module, '__file__', ''))
-
-    def get_resource_filename(self, manager, resource_name):
-        return self._fn(self.module_path, resource_name)
-
-    def get_resource_stream(self, manager, resource_name):
-        return io.BytesIO(self.get_resource_string(manager, resource_name))
-
-    def get_resource_string(self, manager, resource_name):
-        return self._get(self._fn(self.module_path, resource_name))
-
-    def has_resource(self, resource_name):
-        return self._has(self._fn(self.module_path, resource_name))
-
-    def has_metadata(self, name):
-        return self.egg_info and self._has(self._fn(self.egg_info, name))
-
-    def get_metadata(self, name):
-        if not self.egg_info:
-            return ""
-        value = self._get(self._fn(self.egg_info, name))
-        return value.decode('utf-8') if six.PY3 else value
-
-    def get_metadata_lines(self, name):
-        return yield_lines(self.get_metadata(name))
-
-    def resource_isdir(self, resource_name):
-        return self._isdir(self._fn(self.module_path, resource_name))
-
-    def metadata_isdir(self, name):
-        return self.egg_info and self._isdir(self._fn(self.egg_info, name))
-
-    def resource_listdir(self, resource_name):
-        return self._listdir(self._fn(self.module_path, resource_name))
-
-    def metadata_listdir(self, name):
-        if self.egg_info:
-            return self._listdir(self._fn(self.egg_info, name))
-        return []
-
-    def run_script(self, script_name, namespace):
-        script = 'scripts/' + script_name
-        if not self.has_metadata(script):
-            raise ResolutionError(
-                "Script {script!r} not found in metadata at {self.egg_info!r}"
-                .format(**locals()),
-            )
-        script_text = self.get_metadata(script).replace('\r\n', '\n')
-        script_text = script_text.replace('\r', '\n')
-        script_filename = self._fn(self.egg_info, script)
-        namespace['__file__'] = script_filename
-        if os.path.exists(script_filename):
-            source = open(script_filename).read()
-            code = compile(source, script_filename, 'exec')
-            exec(code, namespace, namespace)
-        else:
-            from linecache import cache
-            cache[script_filename] = (
-                len(script_text), 0, script_text.split('\n'), script_filename
-            )
-            script_code = compile(script_text, script_filename, 'exec')
-            exec(script_code, namespace, namespace)
-
-    def _has(self, path):
-        raise NotImplementedError(
-            "Can't perform this operation for unregistered loader type"
-        )
-
-    def _isdir(self, path):
-        raise NotImplementedError(
-            "Can't perform this operation for unregistered loader type"
-        )
-
-    def _listdir(self, path):
-        raise NotImplementedError(
-            "Can't perform this operation for unregistered loader type"
-        )
-
-    def _fn(self, base, resource_name):
-        if resource_name:
-            return os.path.join(base, *resource_name.split('/'))
-        return base
-
-    def _get(self, path):
-        if hasattr(self.loader, 'get_data'):
-            return self.loader.get_data(path)
-        raise NotImplementedError(
-            "Can't perform this operation for loaders without 'get_data()'"
-        )
-
-
-register_loader_type(object, NullProvider)
-
-
-class EggProvider(NullProvider):
-    """Provider based on a virtual filesystem"""
-
-    def __init__(self, module):
-        NullProvider.__init__(self, module)
-        self._setup_prefix()
-
-    def _setup_prefix(self):
-        # we assume here that our metadata may be nested inside a "basket"
-        # of multiple eggs; that's why we use module_path instead of .archive
-        path = self.module_path
-        old = None
-        while path != old:
-            if _is_egg_path(path):
-                self.egg_name = os.path.basename(path)
-                self.egg_info = os.path.join(path, 'EGG-INFO')
-                self.egg_root = path
-                break
-            old = path
-            path, base = os.path.split(path)
-
-
-class DefaultProvider(EggProvider):
-    """Provides access to package resources in the filesystem"""
-
-    def _has(self, path):
-        return os.path.exists(path)
-
-    def _isdir(self, path):
-        return os.path.isdir(path)
-
-    def _listdir(self, path):
-        return os.listdir(path)
-
-    def get_resource_stream(self, manager, resource_name):
-        return open(self._fn(self.module_path, resource_name), 'rb')
-
-    def _get(self, path):
-        with open(path, 'rb') as stream:
-            return stream.read()
-
-    @classmethod
-    def _register(cls):
-        loader_names = 'SourceFileLoader', 'SourcelessFileLoader',
-        for name in loader_names:
-            loader_cls = getattr(importlib_machinery, name, type(None))
-            register_loader_type(loader_cls, cls)
-
-
-DefaultProvider._register()
-
-
-class EmptyProvider(NullProvider):
-    """Provider that returns nothing for all requests"""
-
-    module_path = None
-
-    _isdir = _has = lambda self, path: False
-
-    def _get(self, path):
-        return ''
-
-    def _listdir(self, path):
-        return []
-
-    def __init__(self):
-        pass
-
-
-empty_provider = EmptyProvider()
-
-
-class ZipManifests(dict):
-    """
-    zip manifest builder
-    """
-
-    @classmethod
-    def build(cls, path):
-        """
-        Build a dictionary similar to the zipimport directory
-        caches, except instead of tuples, store ZipInfo objects.
-
-        Use a platform-specific path separator (os.sep) for the path keys
-        for compatibility with pypy on Windows.
-        """
-        with zipfile.ZipFile(path) as zfile:
-            items = (
-                (
-                    name.replace('/', os.sep),
-                    zfile.getinfo(name),
-                )
-                for name in zfile.namelist()
-            )
-            return dict(items)
-
-    load = build
-
-
-class MemoizedZipManifests(ZipManifests):
-    """
-    Memoized zipfile manifests.
-    """
-    manifest_mod = collections.namedtuple('manifest_mod', 'manifest mtime')
-
-    def load(self, path):
-        """
-        Load a manifest at path or return a suitable manifest already loaded.
-        """
-        path = os.path.normpath(path)
-        mtime = os.stat(path).st_mtime
-
-        if path not in self or self[path].mtime != mtime:
-            manifest = self.build(path)
-            self[path] = self.manifest_mod(manifest, mtime)
-
-        return self[path].manifest
-
-
-class ZipProvider(EggProvider):
-    """Resource support for zips and eggs"""
-
-    eagers = None
-    _zip_manifests = MemoizedZipManifests()
-
-    def __init__(self, module):
-        EggProvider.__init__(self, module)
-        self.zip_pre = self.loader.archive + os.sep
-
-    def _zipinfo_name(self, fspath):
-        # Convert a virtual filename (full path to file) into a zipfile subpath
-        # usable with the zipimport directory cache for our target archive
-        fspath = fspath.rstrip(os.sep)
-        if fspath == self.loader.archive:
-            return ''
-        if fspath.startswith(self.zip_pre):
-            return fspath[len(self.zip_pre):]
-        raise AssertionError(
-            "%s is not a subpath of %s" % (fspath, self.zip_pre)
-        )
-
-    def _parts(self, zip_path):
-        # Convert a zipfile subpath into an egg-relative path part list.
-        # pseudo-fs path
-        fspath = self.zip_pre + zip_path
-        if fspath.startswith(self.egg_root + os.sep):
-            return fspath[len(self.egg_root) + 1:].split(os.sep)
-        raise AssertionError(
-            "%s is not a subpath of %s" % (fspath, self.egg_root)
-        )
-
-    @property
-    def zipinfo(self):
-        return self._zip_manifests.load(self.loader.archive)
-
-    def get_resource_filename(self, manager, resource_name):
-        if not self.egg_name:
-            raise NotImplementedError(
-                "resource_filename() only supported for .egg, not .zip"
-            )
-        # no need to lock for extraction, since we use temp names
-        zip_path = self._resource_to_zip(resource_name)
-        eagers = self._get_eager_resources()
-        if '/'.join(self._parts(zip_path)) in eagers:
-            for name in eagers:
-                self._extract_resource(manager, self._eager_to_zip(name))
-        return self._extract_resource(manager, zip_path)
-
-    @staticmethod
-    def _get_date_and_size(zip_stat):
-        size = zip_stat.file_size
-        # ymdhms+wday, yday, dst
-        date_time = zip_stat.date_time + (0, 0, -1)
-        # 1980 offset already done
-        timestamp = time.mktime(date_time)
-        return timestamp, size
-
-    def _extract_resource(self, manager, zip_path):
-
-        if zip_path in self._index():
-            for name in self._index()[zip_path]:
-                last = self._extract_resource(
-                    manager, os.path.join(zip_path, name)
-                )
-            # return the extracted directory name
-            return os.path.dirname(last)
-
-        timestamp, size = self._get_date_and_size(self.zipinfo[zip_path])
-
-        if not WRITE_SUPPORT:
-            raise IOError('"os.rename" and "os.unlink" are not supported '
-                          'on this platform')
-        try:
-
-            real_path = manager.get_cache_path(
-                self.egg_name, self._parts(zip_path)
-            )
-
-            if self._is_current(real_path, zip_path):
-                return real_path
-
-            outf, tmpnam = _mkstemp(
-                ".$extract",
-                dir=os.path.dirname(real_path),
-            )
-            os.write(outf, self.loader.get_data(zip_path))
-            os.close(outf)
-            utime(tmpnam, (timestamp, timestamp))
-            manager.postprocess(tmpnam, real_path)
-
-            try:
-                rename(tmpnam, real_path)
-
-            except os.error:
-                if os.path.isfile(real_path):
-                    if self._is_current(real_path, zip_path):
-                        # the file became current since it was checked above,
-                        #  so proceed.
-                        return real_path
-                    # Windows, del old file and retry
-                    elif os.name == 'nt':
-                        unlink(real_path)
-                        rename(tmpnam, real_path)
-                        return real_path
-                raise
-
-        except os.error:
-            # report a user-friendly error
-            manager.extraction_error()
-
-        return real_path
-
-    def _is_current(self, file_path, zip_path):
-        """
-        Return True if the file_path is current for this zip_path
-        """
-        timestamp, size = self._get_date_and_size(self.zipinfo[zip_path])
-        if not os.path.isfile(file_path):
-            return False
-        stat = os.stat(file_path)
-        if stat.st_size != size or stat.st_mtime != timestamp:
-            return False
-        # check that the contents match
-        zip_contents = self.loader.get_data(zip_path)
-        with open(file_path, 'rb') as f:
-            file_contents = f.read()
-        return zip_contents == file_contents
-
-    def _get_eager_resources(self):
-        if self.eagers is None:
-            eagers = []
-            for name in ('native_libs.txt', 'eager_resources.txt'):
-                if self.has_metadata(name):
-                    eagers.extend(self.get_metadata_lines(name))
-            self.eagers = eagers
-        return self.eagers
-
-    def _index(self):
-        try:
-            return self._dirindex
-        except AttributeError:
-            ind = {}
-            for path in self.zipinfo:
-                parts = path.split(os.sep)
-                while parts:
-                    parent = os.sep.join(parts[:-1])
-                    if parent in ind:
-                        ind[parent].append(parts[-1])
-                        break
-                    else:
-                        ind[parent] = [parts.pop()]
-            self._dirindex = ind
-            return ind
-
-    def _has(self, fspath):
-        zip_path = self._zipinfo_name(fspath)
-        return zip_path in self.zipinfo or zip_path in self._index()
-
-    def _isdir(self, fspath):
-        return self._zipinfo_name(fspath) in self._index()
-
-    def _listdir(self, fspath):
-        return list(self._index().get(self._zipinfo_name(fspath), ()))
-
-    def _eager_to_zip(self, resource_name):
-        return self._zipinfo_name(self._fn(self.egg_root, resource_name))
-
-    def _resource_to_zip(self, resource_name):
-        return self._zipinfo_name(self._fn(self.module_path, resource_name))
-
-
-register_loader_type(zipimport.zipimporter, ZipProvider)
-
-
-class FileMetadata(EmptyProvider):
-    """Metadata handler for standalone PKG-INFO files
-
-    Usage::
-
-        metadata = FileMetadata("/path/to/PKG-INFO")
-
-    This provider rejects all data and metadata requests except for PKG-INFO,
-    which is treated as existing, and will be the contents of the file at
-    the provided location.
-    """
-
-    def __init__(self, path):
-        self.path = path
-
-    def has_metadata(self, name):
-        return name == 'PKG-INFO' and os.path.isfile(self.path)
-
-    def get_metadata(self, name):
-        if name != 'PKG-INFO':
-            raise KeyError("No metadata except PKG-INFO is available")
-
-        with io.open(self.path, encoding='utf-8', errors="replace") as f:
-            metadata = f.read()
-        self._warn_on_replacement(metadata)
-        return metadata
-
-    def _warn_on_replacement(self, metadata):
-        # Python 2.7 compat for: replacement_char = '�'
-        replacement_char = b'\xef\xbf\xbd'.decode('utf-8')
-        if replacement_char in metadata:
-            tmpl = "{self.path} could not be properly decoded in UTF-8"
-            msg = tmpl.format(**locals())
-            warnings.warn(msg)
-
-    def get_metadata_lines(self, name):
-        return yield_lines(self.get_metadata(name))
-
-
-class PathMetadata(DefaultProvider):
-    """Metadata provider for egg directories
-
-    Usage::
-
-        # Development eggs:
-
-        egg_info = "/path/to/PackageName.egg-info"
-        base_dir = os.path.dirname(egg_info)
-        metadata = PathMetadata(base_dir, egg_info)
-        dist_name = os.path.splitext(os.path.basename(egg_info))[0]
-        dist = Distribution(basedir, project_name=dist_name, metadata=metadata)
-
-        # Unpacked egg directories:
-
-        egg_path = "/path/to/PackageName-ver-pyver-etc.egg"
-        metadata = PathMetadata(egg_path, os.path.join(egg_path,'EGG-INFO'))
-        dist = Distribution.from_filename(egg_path, metadata=metadata)
-    """
-
-    def __init__(self, path, egg_info):
-        self.module_path = path
-        self.egg_info = egg_info
-
-
-class EggMetadata(ZipProvider):
-    """Metadata provider for .egg files"""
-
-    def __init__(self, importer):
-        """Create a metadata provider from a zipimporter"""
-
-        self.zip_pre = importer.archive + os.sep
-        self.loader = importer
-        if importer.prefix:
-            self.module_path = os.path.join(importer.archive, importer.prefix)
-        else:
-            self.module_path = importer.archive
-        self._setup_prefix()
-
-
-_declare_state('dict', _distribution_finders={})
-
-
-def register_finder(importer_type, distribution_finder):
-    """Register `distribution_finder` to find distributions in sys.path items
-
-    `importer_type` is the type or class of a PEP 302 "Importer" (sys.path item
-    handler), and `distribution_finder` is a callable that, passed a path
-    item and the importer instance, yields ``Distribution`` instances found on
-    that path item.  See ``pkg_resources.find_on_path`` for an example."""
-    _distribution_finders[importer_type] = distribution_finder
-
-
-def find_distributions(path_item, only=False):
-    """Yield distributions accessible via `path_item`"""
-    importer = get_importer(path_item)
-    finder = _find_adapter(_distribution_finders, importer)
-    return finder(importer, path_item, only)
-
-
-def find_eggs_in_zip(importer, path_item, only=False):
-    """
-    Find eggs in zip files; possibly multiple nested eggs.
-    """
-    if importer.archive.endswith('.whl'):
-        # wheels are not supported with this finder
-        # they don't have PKG-INFO metadata, and won't ever contain eggs
-        return
-    metadata = EggMetadata(importer)
-    if metadata.has_metadata('PKG-INFO'):
-        yield Distribution.from_filename(path_item, metadata=metadata)
-    if only:
-        # don't yield nested distros
-        return
-    for subitem in metadata.resource_listdir('/'):
-        if _is_egg_path(subitem):
-            subpath = os.path.join(path_item, subitem)
-            dists = find_eggs_in_zip(zipimport.zipimporter(subpath), subpath)
-            for dist in dists:
-                yield dist
-        elif subitem.lower().endswith('.dist-info'):
-            subpath = os.path.join(path_item, subitem)
-            submeta = EggMetadata(zipimport.zipimporter(subpath))
-            submeta.egg_info = subpath
-            yield Distribution.from_location(path_item, subitem, submeta)
-
-
-register_finder(zipimport.zipimporter, find_eggs_in_zip)
-
-
-def find_nothing(importer, path_item, only=False):
-    return ()
-
-
-register_finder(object, find_nothing)
-
-
-def _by_version_descending(names):
-    """
-    Given a list of filenames, return them in descending order
-    by version number.
-
-    >>> names = 'bar', 'foo', 'Python-2.7.10.egg', 'Python-2.7.2.egg'
-    >>> _by_version_descending(names)
-    ['Python-2.7.10.egg', 'Python-2.7.2.egg', 'foo', 'bar']
-    >>> names = 'Setuptools-1.2.3b1.egg', 'Setuptools-1.2.3.egg'
-    >>> _by_version_descending(names)
-    ['Setuptools-1.2.3.egg', 'Setuptools-1.2.3b1.egg']
-    >>> names = 'Setuptools-1.2.3b1.egg', 'Setuptools-1.2.3.post1.egg'
-    >>> _by_version_descending(names)
-    ['Setuptools-1.2.3.post1.egg', 'Setuptools-1.2.3b1.egg']
-    """
-    def _by_version(name):
-        """
-        Parse each component of the filename
-        """
-        name, ext = os.path.splitext(name)
-        parts = itertools.chain(name.split('-'), [ext])
-        return [packaging.version.parse(part) for part in parts]
-
-    return sorted(names, key=_by_version, reverse=True)
-
-
-def find_on_path(importer, path_item, only=False):
-    """Yield distributions accessible on a sys.path directory"""
-    path_item = _normalize_cached(path_item)
-
-    if _is_unpacked_egg(path_item):
-        yield Distribution.from_filename(
-            path_item, metadata=PathMetadata(
-                path_item, os.path.join(path_item, 'EGG-INFO')
-            )
-        )
-        return
-
-    entries = safe_listdir(path_item)
-
-    # for performance, before sorting by version,
-    # screen entries for only those that will yield
-    # distributions
-    filtered = (
-        entry
-        for entry in entries
-        if dist_factory(path_item, entry, only)
-    )
-
-    # scan for .egg and .egg-info in directory
-    path_item_entries = _by_version_descending(filtered)
-    for entry in path_item_entries:
-        fullpath = os.path.join(path_item, entry)
-        factory = dist_factory(path_item, entry, only)
-        for dist in factory(fullpath):
-            yield dist
-
-
-def dist_factory(path_item, entry, only):
-    """
-    Return a dist_factory for a path_item and entry
-    """
-    lower = entry.lower()
-    is_meta = any(map(lower.endswith, ('.egg-info', '.dist-info')))
-    return (
-        distributions_from_metadata
-        if is_meta else
-        find_distributions
-        if not only and _is_egg_path(entry) else
-        resolve_egg_link
-        if not only and lower.endswith('.egg-link') else
-        NoDists()
-    )
-
-
-class NoDists:
-    """
-    >>> bool(NoDists())
-    False
-
-    >>> list(NoDists()('anything'))
-    []
-    """
-    def __bool__(self):
-        return False
-    if six.PY2:
-        __nonzero__ = __bool__
-
-    def __call__(self, fullpath):
-        return iter(())
-
-
-def safe_listdir(path):
-    """
-    Attempt to list contents of path, but suppress some exceptions.
-    """
-    try:
-        return os.listdir(path)
-    except (PermissionError, NotADirectoryError):
-        pass
-    except OSError as e:
-        # Ignore the directory if does not exist, not a directory or
-        # permission denied
-        ignorable = (
-            e.errno in (errno.ENOTDIR, errno.EACCES, errno.ENOENT)
-            # Python 2 on Windows needs to be handled this way :(
-            or getattr(e, "winerror", None) == 267
-        )
-        if not ignorable:
-            raise
-    return ()
-
-
-def distributions_from_metadata(path):
-    root = os.path.dirname(path)
-    if os.path.isdir(path):
-        if len(os.listdir(path)) == 0:
-            # empty metadata dir; skip
-            return
-        metadata = PathMetadata(root, path)
-    else:
-        metadata = FileMetadata(path)
-    entry = os.path.basename(path)
-    yield Distribution.from_location(
-        root, entry, metadata, precedence=DEVELOP_DIST,
-    )
-
-
-def non_empty_lines(path):
-    """
-    Yield non-empty lines from file at path
-    """
-    with open(path) as f:
-        for line in f:
-            line = line.strip()
-            if line:
-                yield line
-
-
-def resolve_egg_link(path):
-    """
-    Given a path to an .egg-link, resolve distributions
-    present in the referenced path.
-    """
-    referenced_paths = non_empty_lines(path)
-    resolved_paths = (
-        os.path.join(os.path.dirname(path), ref)
-        for ref in referenced_paths
-    )
-    dist_groups = map(find_distributions, resolved_paths)
-    return next(dist_groups, ())
-
-
-register_finder(pkgutil.ImpImporter, find_on_path)
-
-if hasattr(importlib_machinery, 'FileFinder'):
-    register_finder(importlib_machinery.FileFinder, find_on_path)
-
-_declare_state('dict', _namespace_handlers={})
-_declare_state('dict', _namespace_packages={})
-
-
-def register_namespace_handler(importer_type, namespace_handler):
-    """Register `namespace_handler` to declare namespace packages
-
-    `importer_type` is the type or class of a PEP 302 "Importer" (sys.path item
-    handler), and `namespace_handler` is a callable like this::
-
-        def namespace_handler(importer, path_entry, moduleName, module):
-            # return a path_entry to use for child packages
-
-    Namespace handlers are only called if the importer object has already
-    agreed that it can handle the relevant path item, and they should only
-    return a subpath if the module __path__ does not already contain an
-    equivalent subpath.  For an example namespace handler, see
-    ``pkg_resources.file_ns_handler``.
-    """
-    _namespace_handlers[importer_type] = namespace_handler
-
-
-def _handle_ns(packageName, path_item):
-    """Ensure that named package includes a subpath of path_item (if needed)"""
-
-    importer = get_importer(path_item)
-    if importer is None:
-        return None
-
-    # capture warnings due to #1111
-    with warnings.catch_warnings():
-        warnings.simplefilter("ignore")
-        loader = importer.find_module(packageName)
-
-    if loader is None:
-        return None
-    module = sys.modules.get(packageName)
-    if module is None:
-        module = sys.modules[packageName] = types.ModuleType(packageName)
-        module.__path__ = []
-        _set_parent_ns(packageName)
-    elif not hasattr(module, '__path__'):
-        raise TypeError("Not a package:", packageName)
-    handler = _find_adapter(_namespace_handlers, importer)
-    subpath = handler(importer, path_item, packageName, module)
-    if subpath is not None:
-        path = module.__path__
-        path.append(subpath)
-        loader.load_module(packageName)
-        _rebuild_mod_path(path, packageName, module)
-    return subpath
-
-
-def _rebuild_mod_path(orig_path, package_name, module):
-    """
-    Rebuild module.__path__ ensuring that all entries are ordered
-    corresponding to their sys.path order
-    """
-    sys_path = [_normalize_cached(p) for p in sys.path]
-
-    def safe_sys_path_index(entry):
-        """
-        Workaround for #520 and #513.
-        """
-        try:
-            return sys_path.index(entry)
-        except ValueError:
-            return float('inf')
-
-    def position_in_sys_path(path):
-        """
-        Return the ordinal of the path based on its position in sys.path
-        """
-        path_parts = path.split(os.sep)
-        module_parts = package_name.count('.') + 1
-        parts = path_parts[:-module_parts]
-        return safe_sys_path_index(_normalize_cached(os.sep.join(parts)))
-
-    new_path = sorted(orig_path, key=position_in_sys_path)
-    new_path = [_normalize_cached(p) for p in new_path]
-
-    if isinstance(module.__path__, list):
-        module.__path__[:] = new_path
-    else:
-        module.__path__ = new_path
-
-
-def declare_namespace(packageName):
-    """Declare that package 'packageName' is a namespace package"""
-
-    _imp.acquire_lock()
-    try:
-        if packageName in _namespace_packages:
-            return
-
-        path = sys.path
-        parent, _, _ = packageName.rpartition('.')
-
-        if parent:
-            declare_namespace(parent)
-            if parent not in _namespace_packages:
-                __import__(parent)
-            try:
-                path = sys.modules[parent].__path__
-            except AttributeError:
-                raise TypeError("Not a package:", parent)
-
-        # Track what packages are namespaces, so when new path items are added,
-        # they can be updated
-        _namespace_packages.setdefault(parent or None, []).append(packageName)
-        _namespace_packages.setdefault(packageName, [])
-
-        for path_item in path:
-            # Ensure all the parent's path items are reflected in the child,
-            # if they apply
-            _handle_ns(packageName, path_item)
-
-    finally:
-        _imp.release_lock()
-
-
-def fixup_namespace_packages(path_item, parent=None):
-    """Ensure that previously-declared namespace packages include path_item"""
-    _imp.acquire_lock()
-    try:
-        for package in _namespace_packages.get(parent, ()):
-            subpath = _handle_ns(package, path_item)
-            if subpath:
-                fixup_namespace_packages(subpath, package)
-    finally:
-        _imp.release_lock()
-
-
-def file_ns_handler(importer, path_item, packageName, module):
-    """Compute an ns-package subpath for a filesystem or zipfile importer"""
-
-    subpath = os.path.join(path_item, packageName.split('.')[-1])
-    normalized = _normalize_cached(subpath)
-    for item in module.__path__:
-        if _normalize_cached(item) == normalized:
-            break
-    else:
-        # Only return the path if it's not already there
-        return subpath
-
-
-register_namespace_handler(pkgutil.ImpImporter, file_ns_handler)
-register_namespace_handler(zipimport.zipimporter, file_ns_handler)
-
-if hasattr(importlib_machinery, 'FileFinder'):
-    register_namespace_handler(importlib_machinery.FileFinder, file_ns_handler)
-
-
-def null_ns_handler(importer, path_item, packageName, module):
-    return None
-
-
-register_namespace_handler(object, null_ns_handler)
-
-
-def normalize_path(filename):
-    """Normalize a file/dir name for comparison purposes"""
-    return os.path.normcase(os.path.realpath(os.path.normpath(_cygwin_patch(filename))))
-
-
-def _cygwin_patch(filename):  # pragma: nocover
-    """
-    Contrary to POSIX 2008, on Cygwin, getcwd (3) contains
-    symlink components. Using
-    os.path.abspath() works around this limitation. A fix in os.getcwd()
-    would probably better, in Cygwin even more so, except
-    that this seems to be by design...
-    """
-    return os.path.abspath(filename) if sys.platform == 'cygwin' else filename
-
-
-def _normalize_cached(filename, _cache={}):
-    try:
-        return _cache[filename]
-    except KeyError:
-        _cache[filename] = result = normalize_path(filename)
-        return result
-
-
-def _is_egg_path(path):
-    """
-    Determine if given path appears to be an egg.
-    """
-    return path.lower().endswith('.egg')
-
-
-def _is_unpacked_egg(path):
-    """
-    Determine if given path appears to be an unpacked egg.
-    """
-    return (
-        _is_egg_path(path) and
-        os.path.isfile(os.path.join(path, 'EGG-INFO', 'PKG-INFO'))
-    )
-
-
-def _set_parent_ns(packageName):
-    parts = packageName.split('.')
-    name = parts.pop()
-    if parts:
-        parent = '.'.join(parts)
-        setattr(sys.modules[parent], name, sys.modules[packageName])
-
-
-def yield_lines(strs):
-    """Yield non-empty/non-comment lines of a string or sequence"""
-    if isinstance(strs, six.string_types):
-        for s in strs.splitlines():
-            s = s.strip()
-            # skip blank lines/comments
-            if s and not s.startswith('#'):
-                yield s
-    else:
-        for ss in strs:
-            for s in yield_lines(ss):
-                yield s
-
-
-MODULE = re.compile(r"\w+(\.\w+)*$").match
-EGG_NAME = re.compile(
-    r"""
-    (?P<name>[^-]+) (
-        -(?P<ver>[^-]+) (
-            -py(?P<pyver>[^-]+) (
-                -(?P<plat>.+)
-            )?
-        )?
-    )?
-    """,
-    re.VERBOSE | re.IGNORECASE,
-).match
-
-
-class EntryPoint:
-    """Object representing an advertised importable object"""
-
-    def __init__(self, name, module_name, attrs=(), extras=(), dist=None):
-        if not MODULE(module_name):
-            raise ValueError("Invalid module name", module_name)
-        self.name = name
-        self.module_name = module_name
-        self.attrs = tuple(attrs)
-        self.extras = tuple(extras)
-        self.dist = dist
-
-    def __str__(self):
-        s = "%s = %s" % (self.name, self.module_name)
-        if self.attrs:
-            s += ':' + '.'.join(self.attrs)
-        if self.extras:
-            s += ' [%s]' % ','.join(self.extras)
-        return s
-
-    def __repr__(self):
-        return "EntryPoint.parse(%r)" % str(self)
-
-    def load(self, require=True, *args, **kwargs):
-        """
-        Require packages for this EntryPoint, then resolve it.
-        """
-        if not require or args or kwargs:
-            warnings.warn(
-                "Parameters to load are deprecated.  Call .resolve and "
-                ".require separately.",
-                PkgResourcesDeprecationWarning,
-                stacklevel=2,
-            )
-        if require:
-            self.require(*args, **kwargs)
-        return self.resolve()
-
-    def resolve(self):
-        """
-        Resolve the entry point from its module and attrs.
-        """
-        module = __import__(self.module_name, fromlist=['__name__'], level=0)
-        try:
-            return functools.reduce(getattr, self.attrs, module)
-        except AttributeError as exc:
-            raise ImportError(str(exc))
-
-    def require(self, env=None, installer=None):
-        if self.extras and not self.dist:
-            raise UnknownExtra("Can't require() without a distribution", self)
-
-        # Get the requirements for this entry point with all its extras and
-        # then resolve them. We have to pass `extras` along when resolving so
-        # that the working set knows what extras we want. Otherwise, for
-        # dist-info distributions, the working set will assume that the
-        # requirements for that extra are purely optional and skip over them.
-        reqs = self.dist.requires(self.extras)
-        items = working_set.resolve(reqs, env, installer, extras=self.extras)
-        list(map(working_set.add, items))
-
-    pattern = re.compile(
-        r'\s*'
-        r'(?P<name>.+?)\s*'
-        r'=\s*'
-        r'(?P<module>[\w.]+)\s*'
-        r'(:\s*(?P<attr>[\w.]+))?\s*'
-        r'(?P<extras>\[.*\])?\s*$'
-    )
-
-    @classmethod
-    def parse(cls, src, dist=None):
-        """Parse a single entry point from string `src`
-
-        Entry point syntax follows the form::
-
-            name = some.module:some.attr [extra1, extra2]
-
-        The entry name and module name are required, but the ``:attrs`` and
-        ``[extras]`` parts are optional
-        """
-        m = cls.pattern.match(src)
-        if not m:
-            msg = "EntryPoint must be in 'name=module:attrs [extras]' format"
-            raise ValueError(msg, src)
-        res = m.groupdict()
-        extras = cls._parse_extras(res['extras'])
-        attrs = res['attr'].split('.') if res['attr'] else ()
-        return cls(res['name'], res['module'], attrs, extras, dist)
-
-    @classmethod
-    def _parse_extras(cls, extras_spec):
-        if not extras_spec:
-            return ()
-        req = Requirement.parse('x' + extras_spec)
-        if req.specs:
-            raise ValueError()
-        return req.extras
-
-    @classmethod
-    def parse_group(cls, group, lines, dist=None):
-        """Parse an entry point group"""
-        if not MODULE(group):
-            raise ValueError("Invalid group name", group)
-        this = {}
-        for line in yield_lines(lines):
-            ep = cls.parse(line, dist)
-            if ep.name in this:
-                raise ValueError("Duplicate entry point", group, ep.name)
-            this[ep.name] = ep
-        return this
-
-    @classmethod
-    def parse_map(cls, data, dist=None):
-        """Parse a map of entry point groups"""
-        if isinstance(data, dict):
-            data = data.items()
-        else:
-            data = split_sections(data)
-        maps = {}
-        for group, lines in data:
-            if group is None:
-                if not lines:
-                    continue
-                raise ValueError("Entry points must be listed in groups")
-            group = group.strip()
-            if group in maps:
-                raise ValueError("Duplicate group name", group)
-            maps[group] = cls.parse_group(group, lines, dist)
-        return maps
-
-
-def _remove_md5_fragment(location):
-    if not location:
-        return ''
-    parsed = urllib.parse.urlparse(location)
-    if parsed[-1].startswith('md5='):
-        return urllib.parse.urlunparse(parsed[:-1] + ('',))
-    return location
-
-
-def _version_from_file(lines):
-    """
-    Given an iterable of lines from a Metadata file, return
-    the value of the Version field, if present, or None otherwise.
-    """
-    def is_version_line(line):
-        return line.lower().startswith('version:')
-    version_lines = filter(is_version_line, lines)
-    line = next(iter(version_lines), '')
-    _, _, value = line.partition(':')
-    return safe_version(value.strip()) or None
-
-
-class Distribution:
-    """Wrap an actual or potential sys.path entry w/metadata"""
-    PKG_INFO = 'PKG-INFO'
-
-    def __init__(
-            self, location=None, metadata=None, project_name=None,
-            version=None, py_version=PY_MAJOR, platform=None,
-            precedence=EGG_DIST):
-        self.project_name = safe_name(project_name or 'Unknown')
-        if version is not None:
-            self._version = safe_version(version)
-        self.py_version = py_version
-        self.platform = platform
-        self.location = location
-        self.precedence = precedence
-        self._provider = metadata or empty_provider
-
-    @classmethod
-    def from_location(cls, location, basename, metadata=None, **kw):
-        project_name, version, py_version, platform = [None] * 4
-        basename, ext = os.path.splitext(basename)
-        if ext.lower() in _distributionImpl:
-            cls = _distributionImpl[ext.lower()]
-
-            match = EGG_NAME(basename)
-            if match:
-                project_name, version, py_version, platform = match.group(
-                    'name', 'ver', 'pyver', 'plat'
-                )
-        return cls(
-            location, metadata, project_name=project_name, version=version,
-            py_version=py_version, platform=platform, **kw
-        )._reload_version()
-
-    def _reload_version(self):
-        return self
-
-    @property
-    def hashcmp(self):
-        return (
-            self.parsed_version,
-            self.precedence,
-            self.key,
-            _remove_md5_fragment(self.location),
-            self.py_version or '',
-            self.platform or '',
-        )
-
-    def __hash__(self):
-        return hash(self.hashcmp)
-
-    def __lt__(self, other):
-        return self.hashcmp < other.hashcmp
-
-    def __le__(self, other):
-        return self.hashcmp <= other.hashcmp
-
-    def __gt__(self, other):
-        return self.hashcmp > other.hashcmp
-
-    def __ge__(self, other):
-        return self.hashcmp >= other.hashcmp
-
-    def __eq__(self, other):
-        if not isinstance(other, self.__class__):
-            # It's not a Distribution, so they are not equal
-            return False
-        return self.hashcmp == other.hashcmp
-
-    def __ne__(self, other):
-        return not self == other
-
-    # These properties have to be lazy so that we don't have to load any
-    # metadata until/unless it's actually needed.  (i.e., some distributions
-    # may not know their name or version without loading PKG-INFO)
-
-    @property
-    def key(self):
-        try:
-            return self._key
-        except AttributeError:
-            self._key = key = self.project_name.lower()
-            return key
-
-    @property
-    def parsed_version(self):
-        if not hasattr(self, "_parsed_version"):
-            self._parsed_version = parse_version(self.version)
-
-        return self._parsed_version
-
-    def _warn_legacy_version(self):
-        LV = packaging.version.LegacyVersion
-        is_legacy = isinstance(self._parsed_version, LV)
-        if not is_legacy:
-            return
-
-        # While an empty version is technically a legacy version and
-        # is not a valid PEP 440 version, it's also unlikely to
-        # actually come from someone and instead it is more likely that
-        # it comes from setuptools attempting to parse a filename and
-        # including it in the list. So for that we'll gate this warning
-        # on if the version is anything at all or not.
-        if not self.version:
-            return
-
-        tmpl = textwrap.dedent("""
-            '{project_name} ({version})' is being parsed as a legacy,
-            non PEP 440,
-            version. You may find odd behavior and sort order.
-            In particular it will be sorted as less than 0.0. It
-            is recommended to migrate to PEP 440 compatible
-            versions.
-            """).strip().replace('\n', ' ')
-
-        warnings.warn(tmpl.format(**vars(self)), PEP440Warning)
-
-    @property
-    def version(self):
-        try:
-            return self._version
-        except AttributeError:
-            version = _version_from_file(self._get_metadata(self.PKG_INFO))
-            if version is None:
-                tmpl = "Missing 'Version:' header and/or %s file"
-                raise ValueError(tmpl % self.PKG_INFO, self)
-            return version
-
-    @property
-    def _dep_map(self):
-        """
-        A map of extra to its list of (direct) requirements
-        for this distribution, including the null extra.
-        """
-        try:
-            return self.__dep_map
-        except AttributeError:
-            self.__dep_map = self._filter_extras(self._build_dep_map())
-        return self.__dep_map
-
-    @staticmethod
-    def _filter_extras(dm):
-        """
-        Given a mapping of extras to dependencies, strip off
-        environment markers and filter out any dependencies
-        not matching the markers.
-        """
-        for extra in list(filter(None, dm)):
-            new_extra = extra
-            reqs = dm.pop(extra)
-            new_extra, _, marker = extra.partition(':')
-            fails_marker = marker and (
-                invalid_marker(marker)
-                or not evaluate_marker(marker)
-            )
-            if fails_marker:
-                reqs = []
-            new_extra = safe_extra(new_extra) or None
-
-            dm.setdefault(new_extra, []).extend(reqs)
-        return dm
-
-    def _build_dep_map(self):
-        dm = {}
-        for name in 'requires.txt', 'depends.txt':
-            for extra, reqs in split_sections(self._get_metadata(name)):
-                dm.setdefault(extra, []).extend(parse_requirements(reqs))
-        return dm
-
-    def requires(self, extras=()):
-        """List of Requirements needed for this distro if `extras` are used"""
-        dm = self._dep_map
-        deps = []
-        deps.extend(dm.get(None, ()))
-        for ext in extras:
-            try:
-                deps.extend(dm[safe_extra(ext)])
-            except KeyError:
-                raise UnknownExtra(
-                    "%s has no such extra feature %r" % (self, ext)
-                )
-        return deps
-
-    def _get_metadata(self, name):
-        if self.has_metadata(name):
-            for line in self.get_metadata_lines(name):
-                yield line
-
-    def activate(self, path=None, replace=False):
-        """Ensure distribution is importable on `path` (default=sys.path)"""
-        if path is None:
-            path = sys.path
-        self.insert_on(path, replace=replace)
-        if path is sys.path:
-            fixup_namespace_packages(self.location)
-            for pkg in self._get_metadata('namespace_packages.txt'):
-                if pkg in sys.modules:
-                    declare_namespace(pkg)
-
-    def egg_name(self):
-        """Return what this distribution's standard .egg filename should be"""
-        filename = "%s-%s-py%s" % (
-            to_filename(self.project_name), to_filename(self.version),
-            self.py_version or PY_MAJOR
-        )
-
-        if self.platform:
-            filename += '-' + self.platform
-        return filename
-
-    def __repr__(self):
-        if self.location:
-            return "%s (%s)" % (self, self.location)
-        else:
-            return str(self)
-
-    def __str__(self):
-        try:
-            version = getattr(self, 'version', None)
-        except ValueError:
-            version = None
-        version = version or "[unknown version]"
-        return "%s %s" % (self.project_name, version)
-
-    def __getattr__(self, attr):
-        """Delegate all unrecognized public attributes to .metadata provider"""
-        if attr.startswith('_'):
-            raise AttributeError(attr)
-        return getattr(self._provider, attr)
-
-    def __dir__(self):
-        return list(
-            set(super(Distribution, self).__dir__())
-            | set(
-                attr for attr in self._provider.__dir__()
-                if not attr.startswith('_')
-            )
-        )
-
-    if not hasattr(object, '__dir__'):
-        # python 2.7 not supported
-        del __dir__
-
-    @classmethod
-    def from_filename(cls, filename, metadata=None, **kw):
-        return cls.from_location(
-            _normalize_cached(filename), os.path.basename(filename), metadata,
-            **kw
-        )
-
-    def as_requirement(self):
-        """Return a ``Requirement`` that matches this distribution exactly"""
-        if isinstance(self.parsed_version, packaging.version.Version):
-            spec = "%s==%s" % (self.project_name, self.parsed_version)
-        else:
-            spec = "%s===%s" % (self.project_name, self.parsed_version)
-
-        return Requirement.parse(spec)
-
-    def load_entry_point(self, group, name):
-        """Return the `name` entry point of `group` or raise ImportError"""
-        ep = self.get_entry_info(group, name)
-        if ep is None:
-            raise ImportError("Entry point %r not found" % ((group, name),))
-        return ep.load()
-
-    def get_entry_map(self, group=None):
-        """Return the entry point map for `group`, or the full entry map"""
-        try:
-            ep_map = self._ep_map
-        except AttributeError:
-            ep_map = self._ep_map = EntryPoint.parse_map(
-                self._get_metadata('entry_points.txt'), self
-            )
-        if group is not None:
-            return ep_map.get(group, {})
-        return ep_map
-
-    def get_entry_info(self, group, name):
-        """Return the EntryPoint object for `group`+`name`, or ``None``"""
-        return self.get_entry_map(group).get(name)
-
-    def insert_on(self, path, loc=None, replace=False):
-        """Ensure self.location is on path
-
-        If replace=False (default):
-            - If location is already in path anywhere, do nothing.
-            - Else:
-              - If it's an egg and its parent directory is on path,
-                insert just ahead of the parent.
-              - Else: add to the end of path.
-        If replace=True:
-            - If location is already on path anywhere (not eggs)
-              or higher priority than its parent (eggs)
-              do nothing.
-            - Else:
-              - If it's an egg and its parent directory is on path,
-                insert just ahead of the parent,
-                removing any lower-priority entries.
-              - Else: add it to the front of path.
-        """
-
-        loc = loc or self.location
-        if not loc:
-            return
-
-        nloc = _normalize_cached(loc)
-        bdir = os.path.dirname(nloc)
-        npath = [(p and _normalize_cached(p) or p) for p in path]
-
-        for p, item in enumerate(npath):
-            if item == nloc:
-                if replace:
-                    break
-                else:
-                    # don't modify path (even removing duplicates) if
-                    # found and not replace
-                    return
-            elif item == bdir and self.precedence == EGG_DIST:
-                # if it's an .egg, give it precedence over its directory
-                # UNLESS it's already been added to sys.path and replace=False
-                if (not replace) and nloc in npath[p:]:
-                    return
-                if path is sys.path:
-                    self.check_version_conflict()
-                path.insert(p, loc)
-                npath.insert(p, nloc)
-                break
-        else:
-            if path is sys.path:
-                self.check_version_conflict()
-            if replace:
-                path.insert(0, loc)
-            else:
-                path.append(loc)
-            return
-
-        # p is the spot where we found or inserted loc; now remove duplicates
-        while True:
-            try:
-                np = npath.index(nloc, p + 1)
-            except ValueError:
-                break
-            else:
-                del npath[np], path[np]
-                # ha!
-                p = np
-
-        return
-
-    def check_version_conflict(self):
-        if self.key == 'setuptools':
-            # ignore the inevitable setuptools self-conflicts  :(
-            return
-
-        nsp = dict.fromkeys(self._get_metadata('namespace_packages.txt'))
-        loc = normalize_path(self.location)
-        for modname in self._get_metadata('top_level.txt'):
-            if (modname not in sys.modules or modname in nsp
-                    or modname in _namespace_packages):
-                continue
-            if modname in ('pkg_resources', 'setuptools', 'site'):
-                continue
-            fn = getattr(sys.modules[modname], '__file__', None)
-            if fn and (normalize_path(fn).startswith(loc) or
-                       fn.startswith(self.location)):
-                continue
-            issue_warning(
-                "Module %s was already imported from %s, but %s is being added"
-                " to sys.path" % (modname, fn, self.location),
-            )
-
-    def has_version(self):
-        try:
-            self.version
-        except ValueError:
-            issue_warning("Unbuilt egg for " + repr(self))
-            return False
-        return True
-
-    def clone(self, **kw):
-        """Copy this distribution, substituting in any changed keyword args"""
-        names = 'project_name version py_version platform location precedence'
-        for attr in names.split():
-            kw.setdefault(attr, getattr(self, attr, None))
-        kw.setdefault('metadata', self._provider)
-        return self.__class__(**kw)
-
-    @property
-    def extras(self):
-        return [dep for dep in self._dep_map if dep]
-
-
-class EggInfoDistribution(Distribution):
-    def _reload_version(self):
-        """
-        Packages installed by distutils (e.g. numpy or scipy),
-        which uses an old safe_version, and so
-        their version numbers can get mangled when
-        converted to filenames (e.g., 1.11.0.dev0+2329eae to
-        1.11.0.dev0_2329eae). These distributions will not be
-        parsed properly
-        downstream by Distribution and safe_version, so
-        take an extra step and try to get the version number from
-        the metadata file itself instead of the filename.
-        """
-        md_version = _version_from_file(self._get_metadata(self.PKG_INFO))
-        if md_version:
-            self._version = md_version
-        return self
-
-
-class DistInfoDistribution(Distribution):
-    """
-    Wrap an actual or potential sys.path entry
-    w/metadata, .dist-info style.
-    """
-    PKG_INFO = 'METADATA'
-    EQEQ = re.compile(r"([\(,])\s*(\d.*?)\s*([,\)])")
-
-    @property
-    def _parsed_pkg_info(self):
-        """Parse and cache metadata"""
-        try:
-            return self._pkg_info
-        except AttributeError:
-            metadata = self.get_metadata(self.PKG_INFO)
-            self._pkg_info = email.parser.Parser().parsestr(metadata)
-            return self._pkg_info
-
-    @property
-    def _dep_map(self):
-        try:
-            return self.__dep_map
-        except AttributeError:
-            self.__dep_map = self._compute_dependencies()
-            return self.__dep_map
-
-    def _compute_dependencies(self):
-        """Recompute this distribution's dependencies."""
-        dm = self.__dep_map = {None: []}
-
-        reqs = []
-        # Including any condition expressions
-        for req in self._parsed_pkg_info.get_all('Requires-Dist') or []:
-            reqs.extend(parse_requirements(req))
-
-        def reqs_for_extra(extra):
-            for req in reqs:
-                if not req.marker or req.marker.evaluate({'extra': extra}):
-                    yield req
-
-        common = frozenset(reqs_for_extra(None))
-        dm[None].extend(common)
-
-        for extra in self._parsed_pkg_info.get_all('Provides-Extra') or []:
-            s_extra = safe_extra(extra.strip())
-            dm[s_extra] = list(frozenset(reqs_for_extra(extra)) - common)
-
-        return dm
-
-
-_distributionImpl = {
-    '.egg': Distribution,
-    '.egg-info': EggInfoDistribution,
-    '.dist-info': DistInfoDistribution,
-}
-
-
-def issue_warning(*args, **kw):
-    level = 1
-    g = globals()
-    try:
-        # find the first stack frame that is *not* code in
-        # the pkg_resources module, to use for the warning
-        while sys._getframe(level).f_globals is g:
-            level += 1
-    except ValueError:
-        pass
-    warnings.warn(stacklevel=level + 1, *args, **kw)
-
-
-class RequirementParseError(ValueError):
-    def __str__(self):
-        return ' '.join(self.args)
-
-
-def parse_requirements(strs):
-    """Yield ``Requirement`` objects for each specification in `strs`
-
-    `strs` must be a string, or a (possibly-nested) iterable thereof.
-    """
-    # create a steppable iterator, so we can handle \-continuations
-    lines = iter(yield_lines(strs))
-
-    for line in lines:
-        # Drop comments -- a hash without a space may be in a URL.
-        if ' #' in line:
-            line = line[:line.find(' #')]
-        # If there is a line continuation, drop it, and append the next line.
-        if line.endswith('\\'):
-            line = line[:-2].strip()
-            try:
-                line += next(lines)
-            except StopIteration:
-                return
-        yield Requirement(line)
-
-
-class Requirement(packaging.requirements.Requirement):
-    def __init__(self, requirement_string):
-        """DO NOT CALL THIS UNDOCUMENTED METHOD; use Requirement.parse()!"""
-        try:
-            super(Requirement, self).__init__(requirement_string)
-        except packaging.requirements.InvalidRequirement as e:
-            raise RequirementParseError(str(e))
-        self.unsafe_name = self.name
-        project_name = safe_name(self.name)
-        self.project_name, self.key = project_name, project_name.lower()
-        self.specs = [
-            (spec.operator, spec.version) for spec in self.specifier]
-        self.extras = tuple(map(safe_extra, self.extras))
-        self.hashCmp = (
-            self.key,
-            self.specifier,
-            frozenset(self.extras),
-            str(self.marker) if self.marker else None,
-        )
-        self.__hash = hash(self.hashCmp)
-
-    def __eq__(self, other):
-        return (
-            isinstance(other, Requirement) and
-            self.hashCmp == other.hashCmp
-        )
-
-    def __ne__(self, other):
-        return not self == other
-
-    def __contains__(self, item):
-        if isinstance(item, Distribution):
-            if item.key != self.key:
-                return False
-
-            item = item.version
-
-        # Allow prereleases always in order to match the previous behavior of
-        # this method. In the future this should be smarter and follow PEP 440
-        # more accurately.
-        return self.specifier.contains(item, prereleases=True)
-
-    def __hash__(self):
-        return self.__hash
-
-    def __repr__(self):
-        return "Requirement.parse(%r)" % str(self)
-
-    @staticmethod
-    def parse(s):
-        req, = parse_requirements(s)
-        return req
-
-
-def _always_object(classes):
-    """
-    Ensure object appears in the mro even
-    for old-style classes.
-    """
-    if object not in classes:
-        return classes + (object,)
-    return classes
-
-
-def _find_adapter(registry, ob):
-    """Return an adapter factory for `ob` from `registry`"""
-    types = _always_object(inspect.getmro(getattr(ob, '__class__', type(ob))))
-    for t in types:
-        if t in registry:
-            return registry[t]
-
-
-def ensure_directory(path):
-    """Ensure that the parent directory of `path` exists"""
-    dirname = os.path.dirname(path)
-    py31compat.makedirs(dirname, exist_ok=True)
-
-
-def _bypass_ensure_directory(path):
-    """Sandbox-bypassing version of ensure_directory()"""
-    if not WRITE_SUPPORT:
-        raise IOError('"os.mkdir" not supported on this platform.')
-    dirname, filename = split(path)
-    if dirname and filename and not isdir(dirname):
-        _bypass_ensure_directory(dirname)
-        try:
-            mkdir(dirname, 0o755)
-        except FileExistsError:
-            pass
-
-
-def split_sections(s):
-    """Split a string or iterable thereof into (section, content) pairs
-
-    Each ``section`` is a stripped version of the section header ("[section]")
-    and each ``content`` is a list of stripped lines excluding blank lines and
-    comment-only lines.  If there are any such lines before the first section
-    header, they're returned in a first ``section`` of ``None``.
-    """
-    section = None
-    content = []
-    for line in yield_lines(s):
-        if line.startswith("["):
-            if line.endswith("]"):
-                if section or content:
-                    yield section, content
-                section = line[1:-1].strip()
-                content = []
-            else:
-                raise ValueError("Invalid section heading", line)
-        else:
-            content.append(line)
-
-    # wrap up last segment
-    yield section, content
-
-
-def _mkstemp(*args, **kw):
-    old_open = os.open
-    try:
-        # temporarily bypass sandboxing
-        os.open = os_open
-        return tempfile.mkstemp(*args, **kw)
-    finally:
-        # and then put it back
-        os.open = old_open
-
-
-# Silence the PEP440Warning by default, so that end users don't get hit by it
-# randomly just because they use pkg_resources. We want to append the rule
-# because we want earlier uses of filterwarnings to take precedence over this
-# one.
-warnings.filterwarnings("ignore", category=PEP440Warning, append=True)
-
-
-# from jaraco.functools 1.3
-def _call_aside(f, *args, **kwargs):
-    f(*args, **kwargs)
-    return f
-
-
-@_call_aside
-def _initialize(g=globals()):
-    "Set up global resource manager (deliberately not state-saved)"
-    manager = ResourceManager()
-    g['_manager'] = manager
-    g.update(
-        (name, getattr(manager, name))
-        for name in dir(manager)
-        if not name.startswith('_')
-    )
-
-
-@_call_aside
-def _initialize_master_working_set():
-    """
-    Prepare the master working set and make the ``require()``
-    API available.
-
-    This function has explicit effects on the global state
-    of pkg_resources. It is intended to be invoked once at
-    the initialization of this module.
-
-    Invocation by other packages is unsupported and done
-    at their own risk.
-    """
-    working_set = WorkingSet._build_master()
-    _declare_state('object', working_set=working_set)
-
-    require = working_set.require
-    iter_entry_points = working_set.iter_entry_points
-    add_activation_listener = working_set.subscribe
-    run_script = working_set.run_script
-    # backward compatibility
-    run_main = run_script
-    # Activate all distributions already on sys.path with replace=False and
-    # ensure that all distributions added to the working set in the future
-    # (e.g. by calling ``require()``) will get activated as well,
-    # with higher priority (replace=True).
-    tuple(
-        dist.activate(replace=False)
-        for dist in working_set
-    )
-    add_activation_listener(
-        lambda dist: dist.activate(replace=True),
-        existing=False,
-    )
-    working_set.entries = []
-    # match order
-    list(map(working_set.add_entry, sys.path))
-    globals().update(locals())
-
-class PkgResourcesDeprecationWarning(Warning):
-    """
-    Base class for warning about deprecations in ``pkg_resources``
-
-    This class is not derived from ``DeprecationWarning``, and as such is
-    visible by default.
-    """
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pkg_resources/py31compat.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pkg_resources/py31compat.py
deleted file mode 100644
index a2d3007..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pkg_resources/py31compat.py
+++ /dev/null
@@ -1,23 +0,0 @@
-import os
-import errno
-import sys
-
-from pip._vendor import six
-
-
-def _makedirs_31(path, exist_ok=False):
-    try:
-        os.makedirs(path)
-    except OSError as exc:
-        if not exist_ok or exc.errno != errno.EEXIST:
-            raise
-
-
-# rely on compatibility behavior until mode considerations
-#  and exists_ok considerations are disentangled.
-# See https://github.com/pypa/setuptools/pull/1083#issuecomment-315168663
-needs_makedirs = (
-    six.PY2 or
-    (3, 4) <= sys.version_info < (3, 4, 1)
-)
-makedirs = _makedirs_31 if needs_makedirs else os.makedirs
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/progress/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/progress/__init__.py
deleted file mode 100644
index a41f65d..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/progress/__init__.py
+++ /dev/null
@@ -1,127 +0,0 @@
-# Copyright (c) 2012 Giorgos Verigakis <verigak@gmail.com>
-#
-# Permission to use, copy, modify, and distribute this software for any
-# purpose with or without fee is hereby granted, provided that the above
-# copyright notice and this permission notice appear in all copies.
-#
-# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-
-from __future__ import division
-
-from collections import deque
-from datetime import timedelta
-from math import ceil
-from sys import stderr
-from time import time
-
-
-__version__ = '1.4'
-
-
-class Infinite(object):
-    file = stderr
-    sma_window = 10         # Simple Moving Average window
-
-    def __init__(self, *args, **kwargs):
-        self.index = 0
-        self.start_ts = time()
-        self.avg = 0
-        self._ts = self.start_ts
-        self._xput = deque(maxlen=self.sma_window)
-        for key, val in kwargs.items():
-            setattr(self, key, val)
-
-    def __getitem__(self, key):
-        if key.startswith('_'):
-            return None
-        return getattr(self, key, None)
-
-    @property
-    def elapsed(self):
-        return int(time() - self.start_ts)
-
-    @property
-    def elapsed_td(self):
-        return timedelta(seconds=self.elapsed)
-
-    def update_avg(self, n, dt):
-        if n > 0:
-            self._xput.append(dt / n)
-            self.avg = sum(self._xput) / len(self._xput)
-
-    def update(self):
-        pass
-
-    def start(self):
-        pass
-
-    def finish(self):
-        pass
-
-    def next(self, n=1):
-        now = time()
-        dt = now - self._ts
-        self.update_avg(n, dt)
-        self._ts = now
-        self.index = self.index + n
-        self.update()
-
-    def iter(self, it):
-        try:
-            for x in it:
-                yield x
-                self.next()
-        finally:
-            self.finish()
-
-
-class Progress(Infinite):
-    def __init__(self, *args, **kwargs):
-        super(Progress, self).__init__(*args, **kwargs)
-        self.max = kwargs.get('max', 100)
-
-    @property
-    def eta(self):
-        return int(ceil(self.avg * self.remaining))
-
-    @property
-    def eta_td(self):
-        return timedelta(seconds=self.eta)
-
-    @property
-    def percent(self):
-        return self.progress * 100
-
-    @property
-    def progress(self):
-        return min(1, self.index / self.max)
-
-    @property
-    def remaining(self):
-        return max(self.max - self.index, 0)
-
-    def start(self):
-        self.update()
-
-    def goto(self, index):
-        incr = index - self.index
-        self.next(incr)
-
-    def iter(self, it):
-        try:
-            self.max = len(it)
-        except TypeError:
-            pass
-
-        try:
-            for x in it:
-                yield x
-                self.next()
-        finally:
-            self.finish()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/progress/bar.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/progress/bar.py
deleted file mode 100644
index 025e61c..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/progress/bar.py
+++ /dev/null
@@ -1,94 +0,0 @@
-# -*- coding: utf-8 -*-
-
-# Copyright (c) 2012 Giorgos Verigakis <verigak@gmail.com>
-#
-# Permission to use, copy, modify, and distribute this software for any
-# purpose with or without fee is hereby granted, provided that the above
-# copyright notice and this permission notice appear in all copies.
-#
-# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-
-from __future__ import unicode_literals
-
-import sys
-
-from . import Progress
-from .helpers import WritelnMixin
-
-
-class Bar(WritelnMixin, Progress):
-    width = 32
-    message = ''
-    suffix = '%(index)d/%(max)d'
-    bar_prefix = ' |'
-    bar_suffix = '| '
-    empty_fill = ' '
-    fill = '#'
-    hide_cursor = True
-
-    def update(self):
-        filled_length = int(self.width * self.progress)
-        empty_length = self.width - filled_length
-
-        message = self.message % self
-        bar = self.fill * filled_length
-        empty = self.empty_fill * empty_length
-        suffix = self.suffix % self
-        line = ''.join([message, self.bar_prefix, bar, empty, self.bar_suffix,
-                        suffix])
-        self.writeln(line)
-
-
-class ChargingBar(Bar):
-    suffix = '%(percent)d%%'
-    bar_prefix = ' '
-    bar_suffix = ' '
-    empty_fill = '∙'
-    fill = '█'
-
-
-class FillingSquaresBar(ChargingBar):
-    empty_fill = '▢'
-    fill = '▣'
-
-
-class FillingCirclesBar(ChargingBar):
-    empty_fill = '◯'
-    fill = '◉'
-
-
-class IncrementalBar(Bar):
-    if sys.platform.startswith('win'):
-        phases = (u' ', u'▌', u'█')
-    else:
-        phases = (' ', '▏', '▎', '▍', '▌', '▋', '▊', '▉', '█')
-
-    def update(self):
-        nphases = len(self.phases)
-        filled_len = self.width * self.progress
-        nfull = int(filled_len)                      # Number of full chars
-        phase = int((filled_len - nfull) * nphases)  # Phase of last char
-        nempty = self.width - nfull                  # Number of empty chars
-
-        message = self.message % self
-        bar = self.phases[-1] * nfull
-        current = self.phases[phase] if phase > 0 else ''
-        empty = self.empty_fill * max(0, nempty - len(current))
-        suffix = self.suffix % self
-        line = ''.join([message, self.bar_prefix, bar, current, empty,
-                        self.bar_suffix, suffix])
-        self.writeln(line)
-
-
-class PixelBar(IncrementalBar):
-    phases = ('⡀', '⡄', '⡆', '⡇', '⣇', '⣧', '⣷', '⣿')
-
-
-class ShadyBar(IncrementalBar):
-    phases = (' ', '░', '▒', '▓', '█')
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/progress/counter.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/progress/counter.py
deleted file mode 100644
index 6b45a1e..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/progress/counter.py
+++ /dev/null
@@ -1,48 +0,0 @@
-# -*- coding: utf-8 -*-
-
-# Copyright (c) 2012 Giorgos Verigakis <verigak@gmail.com>
-#
-# Permission to use, copy, modify, and distribute this software for any
-# purpose with or without fee is hereby granted, provided that the above
-# copyright notice and this permission notice appear in all copies.
-#
-# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-
-from __future__ import unicode_literals
-from . import Infinite, Progress
-from .helpers import WriteMixin
-
-
-class Counter(WriteMixin, Infinite):
-    message = ''
-    hide_cursor = True
-
-    def update(self):
-        self.write(str(self.index))
-
-
-class Countdown(WriteMixin, Progress):
-    hide_cursor = True
-
-    def update(self):
-        self.write(str(self.remaining))
-
-
-class Stack(WriteMixin, Progress):
-    phases = (' ', '▁', '▂', '▃', '▄', '▅', '▆', '▇', '█')
-    hide_cursor = True
-
-    def update(self):
-        nphases = len(self.phases)
-        i = min(nphases - 1, int(self.progress * nphases))
-        self.write(self.phases[i])
-
-
-class Pie(Stack):
-    phases = ('○', '◔', '◑', '◕', '●')
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/progress/helpers.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/progress/helpers.py
deleted file mode 100644
index 0cde44e..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/progress/helpers.py
+++ /dev/null
@@ -1,91 +0,0 @@
-# Copyright (c) 2012 Giorgos Verigakis <verigak@gmail.com>
-#
-# Permission to use, copy, modify, and distribute this software for any
-# purpose with or without fee is hereby granted, provided that the above
-# copyright notice and this permission notice appear in all copies.
-#
-# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-
-from __future__ import print_function
-
-
-HIDE_CURSOR = '\x1b[?25l'
-SHOW_CURSOR = '\x1b[?25h'
-
-
-class WriteMixin(object):
-    hide_cursor = False
-
-    def __init__(self, message=None, **kwargs):
-        super(WriteMixin, self).__init__(**kwargs)
-        self._width = 0
-        if message:
-            self.message = message
-
-        if self.file and self.file.isatty():
-            if self.hide_cursor:
-                print(HIDE_CURSOR, end='', file=self.file)
-            print(self.message, end='', file=self.file)
-            self.file.flush()
-
-    def write(self, s):
-        if self.file and self.file.isatty():
-            b = '\b' * self._width
-            c = s.ljust(self._width)
-            print(b + c, end='', file=self.file)
-            self._width = max(self._width, len(s))
-            self.file.flush()
-
-    def finish(self):
-        if self.file and self.file.isatty() and self.hide_cursor:
-            print(SHOW_CURSOR, end='', file=self.file)
-
-
-class WritelnMixin(object):
-    hide_cursor = False
-
-    def __init__(self, message=None, **kwargs):
-        super(WritelnMixin, self).__init__(**kwargs)
-        if message:
-            self.message = message
-
-        if self.file and self.file.isatty() and self.hide_cursor:
-            print(HIDE_CURSOR, end='', file=self.file)
-
-    def clearln(self):
-        if self.file and self.file.isatty():
-            print('\r\x1b[K', end='', file=self.file)
-
-    def writeln(self, line):
-        if self.file and self.file.isatty():
-            self.clearln()
-            print(line, end='', file=self.file)
-            self.file.flush()
-
-    def finish(self):
-        if self.file and self.file.isatty():
-            print(file=self.file)
-            if self.hide_cursor:
-                print(SHOW_CURSOR, end='', file=self.file)
-
-
-from signal import signal, SIGINT
-from sys import exit
-
-
-class SigIntMixin(object):
-    """Registers a signal handler that calls finish on SIGINT"""
-
-    def __init__(self, *args, **kwargs):
-        super(SigIntMixin, self).__init__(*args, **kwargs)
-        signal(SIGINT, self._sigint_handler)
-
-    def _sigint_handler(self, signum, frame):
-        self.finish()
-        exit(0)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/progress/spinner.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/progress/spinner.py
deleted file mode 100644
index 464c7b2..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/progress/spinner.py
+++ /dev/null
@@ -1,44 +0,0 @@
-# -*- coding: utf-8 -*-
-
-# Copyright (c) 2012 Giorgos Verigakis <verigak@gmail.com>
-#
-# Permission to use, copy, modify, and distribute this software for any
-# purpose with or without fee is hereby granted, provided that the above
-# copyright notice and this permission notice appear in all copies.
-#
-# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-
-from __future__ import unicode_literals
-from . import Infinite
-from .helpers import WriteMixin
-
-
-class Spinner(WriteMixin, Infinite):
-    message = ''
-    phases = ('-', '\\', '|', '/')
-    hide_cursor = True
-
-    def update(self):
-        i = self.index % len(self.phases)
-        self.write(self.phases[i])
-
-
-class PieSpinner(Spinner):
-    phases = ['◷', '◶', '◵', '◴']
-
-
-class MoonSpinner(Spinner):
-    phases = ['◑', '◒', '◐', '◓']
-
-
-class LineSpinner(Spinner):
-    phases = ['⎺', '⎻', '⎼', '⎽', '⎼', '⎻']
-
-class PixelSpinner(Spinner):
-    phases = ['⣾','⣷', '⣯', '⣟', '⡿', '⢿', '⣻', '⣽']
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pyparsing.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pyparsing.py
deleted file mode 100644
index bea4d9c..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pyparsing.py
+++ /dev/null
@@ -1,6452 +0,0 @@
-#-*- coding: utf-8 -*-
-# module pyparsing.py
-#
-# Copyright (c) 2003-2019  Paul T. McGuire
-#
-# Permission is hereby granted, free of charge, to any person obtaining
-# a copy of this software and associated documentation files (the
-# "Software"), to deal in the Software without restriction, including
-# without limitation the rights to use, copy, modify, merge, publish,
-# distribute, sublicense, and/or sell copies of the Software, and to
-# permit persons to whom the Software is furnished to do so, subject to
-# the following conditions:
-#
-# The above copyright notice and this permission notice shall be
-# included in all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
-# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
-# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
-# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
-# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-#
-
-__doc__ = \
-"""
-pyparsing module - Classes and methods to define and execute parsing grammars
-=============================================================================
-
-The pyparsing module is an alternative approach to creating and
-executing simple grammars, vs. the traditional lex/yacc approach, or the
-use of regular expressions.  With pyparsing, you don't need to learn
-a new syntax for defining grammars or matching expressions - the parsing
-module provides a library of classes that you use to construct the
-grammar directly in Python.
-
-Here is a program to parse "Hello, World!" (or any greeting of the form
-``"<salutation>, <addressee>!"``), built up using :class:`Word`,
-:class:`Literal`, and :class:`And` elements
-(the :class:`'+'<ParserElement.__add__>` operators create :class:`And` expressions,
-and the strings are auto-converted to :class:`Literal` expressions)::
-
-    from pip._vendor.pyparsing import Word, alphas
-
-    # define grammar of a greeting
-    greet = Word(alphas) + "," + Word(alphas) + "!"
-
-    hello = "Hello, World!"
-    print (hello, "->", greet.parseString(hello))
-
-The program outputs the following::
-
-    Hello, World! -> ['Hello', ',', 'World', '!']
-
-The Python representation of the grammar is quite readable, owing to the
-self-explanatory class names, and the use of '+', '|' and '^' operators.
-
-The :class:`ParseResults` object returned from
-:class:`ParserElement.parseString` can be
-accessed as a nested list, a dictionary, or an object with named
-attributes.
-
-The pyparsing module handles some of the problems that are typically
-vexing when writing text parsers:
-
-  - extra or missing whitespace (the above program will also handle
-    "Hello,World!", "Hello  ,  World  !", etc.)
-  - quoted strings
-  - embedded comments
-
-
-Getting Started -
------------------
-Visit the classes :class:`ParserElement` and :class:`ParseResults` to
-see the base classes that most other pyparsing
-classes inherit from. Use the docstrings for examples of how to:
-
- - construct literal match expressions from :class:`Literal` and
-   :class:`CaselessLiteral` classes
- - construct character word-group expressions using the :class:`Word`
-   class
- - see how to create repetitive expressions using :class:`ZeroOrMore`
-   and :class:`OneOrMore` classes
- - use :class:`'+'<And>`, :class:`'|'<MatchFirst>`, :class:`'^'<Or>`,
-   and :class:`'&'<Each>` operators to combine simple expressions into
-   more complex ones
- - associate names with your parsed results using
-   :class:`ParserElement.setResultsName`
- - find some helpful expression short-cuts like :class:`delimitedList`
-   and :class:`oneOf`
- - find more useful common expressions in the :class:`pyparsing_common`
-   namespace class
-"""
-
-__version__ = "2.3.1"
-__versionTime__ = "09 Jan 2019 23:26 UTC"
-__author__ = "Paul McGuire <ptmcg@users.sourceforge.net>"
-
-import string
-from weakref import ref as wkref
-import copy
-import sys
-import warnings
-import re
-import sre_constants
-import collections
-import pprint
-import traceback
-import types
-from datetime import datetime
-
-try:
-    # Python 3
-    from itertools import filterfalse
-except ImportError:
-    from itertools import ifilterfalse as filterfalse
-
-try:
-    from _thread import RLock
-except ImportError:
-    from threading import RLock
-
-try:
-    # Python 3
-    from collections.abc import Iterable
-    from collections.abc import MutableMapping
-except ImportError:
-    # Python 2.7
-    from collections import Iterable
-    from collections import MutableMapping
-
-try:
-    from collections import OrderedDict as _OrderedDict
-except ImportError:
-    try:
-        from ordereddict import OrderedDict as _OrderedDict
-    except ImportError:
-        _OrderedDict = None
-
-try:
-    from types import SimpleNamespace
-except ImportError:
-    class SimpleNamespace: pass
-
-
-#~ sys.stderr.write( "testing pyparsing module, version %s, %s\n" % (__version__,__versionTime__ ) )
-
-__all__ = [
-'And', 'CaselessKeyword', 'CaselessLiteral', 'CharsNotIn', 'Combine', 'Dict', 'Each', 'Empty',
-'FollowedBy', 'Forward', 'GoToColumn', 'Group', 'Keyword', 'LineEnd', 'LineStart', 'Literal',
-'PrecededBy', 'MatchFirst', 'NoMatch', 'NotAny', 'OneOrMore', 'OnlyOnce', 'Optional', 'Or',
-'ParseBaseException', 'ParseElementEnhance', 'ParseException', 'ParseExpression', 'ParseFatalException',
-'ParseResults', 'ParseSyntaxException', 'ParserElement', 'QuotedString', 'RecursiveGrammarException',
-'Regex', 'SkipTo', 'StringEnd', 'StringStart', 'Suppress', 'Token', 'TokenConverter',
-'White', 'Word', 'WordEnd', 'WordStart', 'ZeroOrMore', 'Char',
-'alphanums', 'alphas', 'alphas8bit', 'anyCloseTag', 'anyOpenTag', 'cStyleComment', 'col',
-'commaSeparatedList', 'commonHTMLEntity', 'countedArray', 'cppStyleComment', 'dblQuotedString',
-'dblSlashComment', 'delimitedList', 'dictOf', 'downcaseTokens', 'empty', 'hexnums',
-'htmlComment', 'javaStyleComment', 'line', 'lineEnd', 'lineStart', 'lineno',
-'makeHTMLTags', 'makeXMLTags', 'matchOnlyAtCol', 'matchPreviousExpr', 'matchPreviousLiteral',
-'nestedExpr', 'nullDebugAction', 'nums', 'oneOf', 'opAssoc', 'operatorPrecedence', 'printables',
-'punc8bit', 'pythonStyleComment', 'quotedString', 'removeQuotes', 'replaceHTMLEntity',
-'replaceWith', 'restOfLine', 'sglQuotedString', 'srange', 'stringEnd',
-'stringStart', 'traceParseAction', 'unicodeString', 'upcaseTokens', 'withAttribute',
-'indentedBlock', 'originalTextFor', 'ungroup', 'infixNotation','locatedExpr', 'withClass',
-'CloseMatch', 'tokenMap', 'pyparsing_common', 'pyparsing_unicode', 'unicode_set',
-]
-
-system_version = tuple(sys.version_info)[:3]
-PY_3 = system_version[0] == 3
-if PY_3:
-    _MAX_INT = sys.maxsize
-    basestring = str
-    unichr = chr
-    unicode = str
-    _ustr = str
-
-    # build list of single arg builtins, that can be used as parse actions
-    singleArgBuiltins = [sum, len, sorted, reversed, list, tuple, set, any, all, min, max]
-
-else:
-    _MAX_INT = sys.maxint
-    range = xrange
-
-    def _ustr(obj):
-        """Drop-in replacement for str(obj) that tries to be Unicode
-        friendly. It first tries str(obj). If that fails with
-        a UnicodeEncodeError, then it tries unicode(obj). It then
-        < returns the unicode object | encodes it with the default
-        encoding | ... >.
-        """
-        if isinstance(obj,unicode):
-            return obj
-
-        try:
-            # If this works, then _ustr(obj) has the same behaviour as str(obj), so
-            # it won't break any existing code.
-            return str(obj)
-
-        except UnicodeEncodeError:
-            # Else encode it
-            ret = unicode(obj).encode(sys.getdefaultencoding(), 'xmlcharrefreplace')
-            xmlcharref = Regex(r'&#\d+;')
-            xmlcharref.setParseAction(lambda t: '\\u' + hex(int(t[0][2:-1]))[2:])
-            return xmlcharref.transformString(ret)
-
-    # build list of single arg builtins, tolerant of Python version, that can be used as parse actions
-    singleArgBuiltins = []
-    import __builtin__
-    for fname in "sum len sorted reversed list tuple set any all min max".split():
-        try:
-            singleArgBuiltins.append(getattr(__builtin__,fname))
-        except AttributeError:
-            continue
-
-_generatorType = type((y for y in range(1)))
-
-def _xml_escape(data):
-    """Escape &, <, >, ", ', etc. in a string of data."""
-
-    # ampersand must be replaced first
-    from_symbols = '&><"\''
-    to_symbols = ('&'+s+';' for s in "amp gt lt quot apos".split())
-    for from_,to_ in zip(from_symbols, to_symbols):
-        data = data.replace(from_, to_)
-    return data
-
-alphas     = string.ascii_uppercase + string.ascii_lowercase
-nums       = "0123456789"
-hexnums    = nums + "ABCDEFabcdef"
-alphanums  = alphas + nums
-_bslash    = chr(92)
-printables = "".join(c for c in string.printable if c not in string.whitespace)
-
-class ParseBaseException(Exception):
-    """base exception class for all parsing runtime exceptions"""
-    # Performance tuning: we construct a *lot* of these, so keep this
-    # constructor as small and fast as possible
-    def __init__( self, pstr, loc=0, msg=None, elem=None ):
-        self.loc = loc
-        if msg is None:
-            self.msg = pstr
-            self.pstr = ""
-        else:
-            self.msg = msg
-            self.pstr = pstr
-        self.parserElement = elem
-        self.args = (pstr, loc, msg)
-
-    @classmethod
-    def _from_exception(cls, pe):
-        """
-        internal factory method to simplify creating one type of ParseException
-        from another - avoids having __init__ signature conflicts among subclasses
-        """
-        return cls(pe.pstr, pe.loc, pe.msg, pe.parserElement)
-
-    def __getattr__( self, aname ):
-        """supported attributes by name are:
-           - lineno - returns the line number of the exception text
-           - col - returns the column number of the exception text
-           - line - returns the line containing the exception text
-        """
-        if( aname == "lineno" ):
-            return lineno( self.loc, self.pstr )
-        elif( aname in ("col", "column") ):
-            return col( self.loc, self.pstr )
-        elif( aname == "line" ):
-            return line( self.loc, self.pstr )
-        else:
-            raise AttributeError(aname)
-
-    def __str__( self ):
-        return "%s (at char %d), (line:%d, col:%d)" % \
-                ( self.msg, self.loc, self.lineno, self.column )
-    def __repr__( self ):
-        return _ustr(self)
-    def markInputline( self, markerString = ">!<" ):
-        """Extracts the exception line from the input string, and marks
-           the location of the exception with a special symbol.
-        """
-        line_str = self.line
-        line_column = self.column - 1
-        if markerString:
-            line_str = "".join((line_str[:line_column],
-                                markerString, line_str[line_column:]))
-        return line_str.strip()
-    def __dir__(self):
-        return "lineno col line".split() + dir(type(self))
-
-class ParseException(ParseBaseException):
-    """
-    Exception thrown when parse expressions don't match class;
-    supported attributes by name are:
-    - lineno - returns the line number of the exception text
-    - col - returns the column number of the exception text
-    - line - returns the line containing the exception text
-
-    Example::
-
-        try:
-            Word(nums).setName("integer").parseString("ABC")
-        except ParseException as pe:
-            print(pe)
-            print("column: {}".format(pe.col))
-
-    prints::
-
-       Expected integer (at char 0), (line:1, col:1)
-        column: 1
-
-    """
-
-    @staticmethod
-    def explain(exc, depth=16):
-        """
-        Method to take an exception and translate the Python internal traceback into a list
-        of the pyparsing expressions that caused the exception to be raised.
-
-        Parameters:
-
-         - exc - exception raised during parsing (need not be a ParseException, in support
-           of Python exceptions that might be raised in a parse action)
-         - depth (default=16) - number of levels back in the stack trace to list expression
-           and function names; if None, the full stack trace names will be listed; if 0, only
-           the failing input line, marker, and exception string will be shown
-
-        Returns a multi-line string listing the ParserElements and/or function names in the
-        exception's stack trace.
-
-        Note: the diagnostic output will include string representations of the expressions
-        that failed to parse. These representations will be more helpful if you use `setName` to
-        give identifiable names to your expressions. Otherwise they will use the default string
-        forms, which may be cryptic to read.
-
-        explain() is only supported under Python 3.
-        """
-        import inspect
-
-        if depth is None:
-            depth = sys.getrecursionlimit()
-        ret = []
-        if isinstance(exc, ParseBaseException):
-            ret.append(exc.line)
-            ret.append(' ' * (exc.col - 1) + '^')
-        ret.append("{0}: {1}".format(type(exc).__name__, exc))
-
-        if depth > 0:
-            callers = inspect.getinnerframes(exc.__traceback__, context=depth)
-            seen = set()
-            for i, ff in enumerate(callers[-depth:]):
-                frm = ff.frame
-
-                f_self = frm.f_locals.get('self', None)
-                if isinstance(f_self, ParserElement):
-                    if frm.f_code.co_name not in ('parseImpl', '_parseNoCache'):
-                        continue
-                    if f_self in seen:
-                        continue
-                    seen.add(f_self)
-
-                    self_type = type(f_self)
-                    ret.append("{0}.{1} - {2}".format(self_type.__module__,
-                                                      self_type.__name__,
-                                                      f_self))
-                elif f_self is not None:
-                    self_type = type(f_self)
-                    ret.append("{0}.{1}".format(self_type.__module__,
-                                                self_type.__name__))
-                else:
-                    code = frm.f_code
-                    if code.co_name in ('wrapper', '<module>'):
-                        continue
-
-                    ret.append("{0}".format(code.co_name))
-
-                depth -= 1
-                if not depth:
-                    break
-
-        return '\n'.join(ret)
-
-
-class ParseFatalException(ParseBaseException):
-    """user-throwable exception thrown when inconsistent parse content
-       is found; stops all parsing immediately"""
-    pass
-
-class ParseSyntaxException(ParseFatalException):
-    """just like :class:`ParseFatalException`, but thrown internally
-    when an :class:`ErrorStop<And._ErrorStop>` ('-' operator) indicates
-    that parsing is to stop immediately because an unbacktrackable
-    syntax error has been found.
-    """
-    pass
-
-#~ class ReparseException(ParseBaseException):
-    #~ """Experimental class - parse actions can raise this exception to cause
-       #~ pyparsing to reparse the input string:
-        #~ - with a modified input string, and/or
-        #~ - with a modified start location
-       #~ Set the values of the ReparseException in the constructor, and raise the
-       #~ exception in a parse action to cause pyparsing to use the new string/location.
-       #~ Setting the values as None causes no change to be made.
-       #~ """
-    #~ def __init_( self, newstring, restartLoc ):
-        #~ self.newParseText = newstring
-        #~ self.reparseLoc = restartLoc
-
-class RecursiveGrammarException(Exception):
-    """exception thrown by :class:`ParserElement.validate` if the
-    grammar could be improperly recursive
-    """
-    def __init__( self, parseElementList ):
-        self.parseElementTrace = parseElementList
-
-    def __str__( self ):
-        return "RecursiveGrammarException: %s" % self.parseElementTrace
-
-class _ParseResultsWithOffset(object):
-    def __init__(self,p1,p2):
-        self.tup = (p1,p2)
-    def __getitem__(self,i):
-        return self.tup[i]
-    def __repr__(self):
-        return repr(self.tup[0])
-    def setOffset(self,i):
-        self.tup = (self.tup[0],i)
-
-class ParseResults(object):
-    """Structured parse results, to provide multiple means of access to
-    the parsed data:
-
-       - as a list (``len(results)``)
-       - by list index (``results[0], results[1]``, etc.)
-       - by attribute (``results.<resultsName>`` - see :class:`ParserElement.setResultsName`)
-
-    Example::
-
-        integer = Word(nums)
-        date_str = (integer.setResultsName("year") + '/'
-                        + integer.setResultsName("month") + '/'
-                        + integer.setResultsName("day"))
-        # equivalent form:
-        # date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
-
-        # parseString returns a ParseResults object
-        result = date_str.parseString("1999/12/31")
-
-        def test(s, fn=repr):
-            print("%s -> %s" % (s, fn(eval(s))))
-        test("list(result)")
-        test("result[0]")
-        test("result['month']")
-        test("result.day")
-        test("'month' in result")
-        test("'minutes' in result")
-        test("result.dump()", str)
-
-    prints::
-
-        list(result) -> ['1999', '/', '12', '/', '31']
-        result[0] -> '1999'
-        result['month'] -> '12'
-        result.day -> '31'
-        'month' in result -> True
-        'minutes' in result -> False
-        result.dump() -> ['1999', '/', '12', '/', '31']
-        - day: 31
-        - month: 12
-        - year: 1999
-    """
-    def __new__(cls, toklist=None, name=None, asList=True, modal=True ):
-        if isinstance(toklist, cls):
-            return toklist
-        retobj = object.__new__(cls)
-        retobj.__doinit = True
-        return retobj
-
-    # Performance tuning: we construct a *lot* of these, so keep this
-    # constructor as small and fast as possible
-    def __init__( self, toklist=None, name=None, asList=True, modal=True, isinstance=isinstance ):
-        if self.__doinit:
-            self.__doinit = False
-            self.__name = None
-            self.__parent = None
-            self.__accumNames = {}
-            self.__asList = asList
-            self.__modal = modal
-            if toklist is None:
-                toklist = []
-            if isinstance(toklist, list):
-                self.__toklist = toklist[:]
-            elif isinstance(toklist, _generatorType):
-                self.__toklist = list(toklist)
-            else:
-                self.__toklist = [toklist]
-            self.__tokdict = dict()
-
-        if name is not None and name:
-            if not modal:
-                self.__accumNames[name] = 0
-            if isinstance(name,int):
-                name = _ustr(name) # will always return a str, but use _ustr for consistency
-            self.__name = name
-            if not (isinstance(toklist, (type(None), basestring, list)) and toklist in (None,'',[])):
-                if isinstance(toklist,basestring):
-                    toklist = [ toklist ]
-                if asList:
-                    if isinstance(toklist,ParseResults):
-                        self[name] = _ParseResultsWithOffset(ParseResults(toklist.__toklist), 0)
-                    else:
-                        self[name] = _ParseResultsWithOffset(ParseResults(toklist[0]),0)
-                    self[name].__name = name
-                else:
-                    try:
-                        self[name] = toklist[0]
-                    except (KeyError,TypeError,IndexError):
-                        self[name] = toklist
-
-    def __getitem__( self, i ):
-        if isinstance( i, (int,slice) ):
-            return self.__toklist[i]
-        else:
-            if i not in self.__accumNames:
-                return self.__tokdict[i][-1][0]
-            else:
-                return ParseResults([ v[0] for v in self.__tokdict[i] ])
-
-    def __setitem__( self, k, v, isinstance=isinstance ):
-        if isinstance(v,_ParseResultsWithOffset):
-            self.__tokdict[k] = self.__tokdict.get(k,list()) + [v]
-            sub = v[0]
-        elif isinstance(k,(int,slice)):
-            self.__toklist[k] = v
-            sub = v
-        else:
-            self.__tokdict[k] = self.__tokdict.get(k,list()) + [_ParseResultsWithOffset(v,0)]
-            sub = v
-        if isinstance(sub,ParseResults):
-            sub.__parent = wkref(self)
-
-    def __delitem__( self, i ):
-        if isinstance(i,(int,slice)):
-            mylen = len( self.__toklist )
-            del self.__toklist[i]
-
-            # convert int to slice
-            if isinstance(i, int):
-                if i < 0:
-                    i += mylen
-                i = slice(i, i+1)
-            # get removed indices
-            removed = list(range(*i.indices(mylen)))
-            removed.reverse()
-            # fixup indices in token dictionary
-            for name,occurrences in self.__tokdict.items():
-                for j in removed:
-                    for k, (value, position) in enumerate(occurrences):
-                        occurrences[k] = _ParseResultsWithOffset(value, position - (position > j))
-        else:
-            del self.__tokdict[i]
-
-    def __contains__( self, k ):
-        return k in self.__tokdict
-
-    def __len__( self ): return len( self.__toklist )
-    def __bool__(self): return ( not not self.__toklist )
-    __nonzero__ = __bool__
-    def __iter__( self ): return iter( self.__toklist )
-    def __reversed__( self ): return iter( self.__toklist[::-1] )
-    def _iterkeys( self ):
-        if hasattr(self.__tokdict, "iterkeys"):
-            return self.__tokdict.iterkeys()
-        else:
-            return iter(self.__tokdict)
-
-    def _itervalues( self ):
-        return (self[k] for k in self._iterkeys())
-
-    def _iteritems( self ):
-        return ((k, self[k]) for k in self._iterkeys())
-
-    if PY_3:
-        keys = _iterkeys
-        """Returns an iterator of all named result keys."""
-
-        values = _itervalues
-        """Returns an iterator of all named result values."""
-
-        items = _iteritems
-        """Returns an iterator of all named result key-value tuples."""
-
-    else:
-        iterkeys = _iterkeys
-        """Returns an iterator of all named result keys (Python 2.x only)."""
-
-        itervalues = _itervalues
-        """Returns an iterator of all named result values (Python 2.x only)."""
-
-        iteritems = _iteritems
-        """Returns an iterator of all named result key-value tuples (Python 2.x only)."""
-
-        def keys( self ):
-            """Returns all named result keys (as a list in Python 2.x, as an iterator in Python 3.x)."""
-            return list(self.iterkeys())
-
-        def values( self ):
-            """Returns all named result values (as a list in Python 2.x, as an iterator in Python 3.x)."""
-            return list(self.itervalues())
-
-        def items( self ):
-            """Returns all named result key-values (as a list of tuples in Python 2.x, as an iterator in Python 3.x)."""
-            return list(self.iteritems())
-
-    def haskeys( self ):
-        """Since keys() returns an iterator, this method is helpful in bypassing
-           code that looks for the existence of any defined results names."""
-        return bool(self.__tokdict)
-
-    def pop( self, *args, **kwargs):
-        """
-        Removes and returns item at specified index (default= ``last``).
-        Supports both ``list`` and ``dict`` semantics for ``pop()``. If
-        passed no argument or an integer argument, it will use ``list``
-        semantics and pop tokens from the list of parsed tokens. If passed
-        a non-integer argument (most likely a string), it will use ``dict``
-        semantics and pop the corresponding value from any defined results
-        names. A second default return value argument is supported, just as in
-        ``dict.pop()``.
-
-        Example::
-
-            def remove_first(tokens):
-                tokens.pop(0)
-            print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']
-            print(OneOrMore(Word(nums)).addParseAction(remove_first).parseString("0 123 321")) # -> ['123', '321']
-
-            label = Word(alphas)
-            patt = label("LABEL") + OneOrMore(Word(nums))
-            print(patt.parseString("AAB 123 321").dump())
-
-            # Use pop() in a parse action to remove named result (note that corresponding value is not
-            # removed from list form of results)
-            def remove_LABEL(tokens):
-                tokens.pop("LABEL")
-                return tokens
-            patt.addParseAction(remove_LABEL)
-            print(patt.parseString("AAB 123 321").dump())
-
-        prints::
-
-            ['AAB', '123', '321']
-            - LABEL: AAB
-
-            ['AAB', '123', '321']
-        """
-        if not args:
-            args = [-1]
-        for k,v in kwargs.items():
-            if k == 'default':
-                args = (args[0], v)
-            else:
-                raise TypeError("pop() got an unexpected keyword argument '%s'" % k)
-        if (isinstance(args[0], int) or
-                        len(args) == 1 or
-                        args[0] in self):
-            index = args[0]
-            ret = self[index]
-            del self[index]
-            return ret
-        else:
-            defaultvalue = args[1]
-            return defaultvalue
-
-    def get(self, key, defaultValue=None):
-        """
-        Returns named result matching the given key, or if there is no
-        such name, then returns the given ``defaultValue`` or ``None`` if no
-        ``defaultValue`` is specified.
-
-        Similar to ``dict.get()``.
-
-        Example::
-
-            integer = Word(nums)
-            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
-
-            result = date_str.parseString("1999/12/31")
-            print(result.get("year")) # -> '1999'
-            print(result.get("hour", "not specified")) # -> 'not specified'
-            print(result.get("hour")) # -> None
-        """
-        if key in self:
-            return self[key]
-        else:
-            return defaultValue
-
-    def insert( self, index, insStr ):
-        """
-        Inserts new element at location index in the list of parsed tokens.
-
-        Similar to ``list.insert()``.
-
-        Example::
-
-            print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']
-
-            # use a parse action to insert the parse location in the front of the parsed results
-            def insert_locn(locn, tokens):
-                tokens.insert(0, locn)
-            print(OneOrMore(Word(nums)).addParseAction(insert_locn).parseString("0 123 321")) # -> [0, '0', '123', '321']
-        """
-        self.__toklist.insert(index, insStr)
-        # fixup indices in token dictionary
-        for name,occurrences in self.__tokdict.items():
-            for k, (value, position) in enumerate(occurrences):
-                occurrences[k] = _ParseResultsWithOffset(value, position + (position > index))
-
-    def append( self, item ):
-        """
-        Add single element to end of ParseResults list of elements.
-
-        Example::
-
-            print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']
-
-            # use a parse action to compute the sum of the parsed integers, and add it to the end
-            def append_sum(tokens):
-                tokens.append(sum(map(int, tokens)))
-            print(OneOrMore(Word(nums)).addParseAction(append_sum).parseString("0 123 321")) # -> ['0', '123', '321', 444]
-        """
-        self.__toklist.append(item)
-
-    def extend( self, itemseq ):
-        """
-        Add sequence of elements to end of ParseResults list of elements.
-
-        Example::
-
-            patt = OneOrMore(Word(alphas))
-
-            # use a parse action to append the reverse of the matched strings, to make a palindrome
-            def make_palindrome(tokens):
-                tokens.extend(reversed([t[::-1] for t in tokens]))
-                return ''.join(tokens)
-            print(patt.addParseAction(make_palindrome).parseString("lskdj sdlkjf lksd")) # -> 'lskdjsdlkjflksddsklfjkldsjdksl'
-        """
-        if isinstance(itemseq, ParseResults):
-            self += itemseq
-        else:
-            self.__toklist.extend(itemseq)
-
-    def clear( self ):
-        """
-        Clear all elements and results names.
-        """
-        del self.__toklist[:]
-        self.__tokdict.clear()
-
-    def __getattr__( self, name ):
-        try:
-            return self[name]
-        except KeyError:
-            return ""
-
-        if name in self.__tokdict:
-            if name not in self.__accumNames:
-                return self.__tokdict[name][-1][0]
-            else:
-                return ParseResults([ v[0] for v in self.__tokdict[name] ])
-        else:
-            return ""
-
-    def __add__( self, other ):
-        ret = self.copy()
-        ret += other
-        return ret
-
-    def __iadd__( self, other ):
-        if other.__tokdict:
-            offset = len(self.__toklist)
-            addoffset = lambda a: offset if a<0 else a+offset
-            otheritems = other.__tokdict.items()
-            otherdictitems = [(k, _ParseResultsWithOffset(v[0],addoffset(v[1])) )
-                                for (k,vlist) in otheritems for v in vlist]
-            for k,v in otherdictitems:
-                self[k] = v
-                if isinstance(v[0],ParseResults):
-                    v[0].__parent = wkref(self)
-
-        self.__toklist += other.__toklist
-        self.__accumNames.update( other.__accumNames )
-        return self
-
-    def __radd__(self, other):
-        if isinstance(other,int) and other == 0:
-            # useful for merging many ParseResults using sum() builtin
-            return self.copy()
-        else:
-            # this may raise a TypeError - so be it
-            return other + self
-
-    def __repr__( self ):
-        return "(%s, %s)" % ( repr( self.__toklist ), repr( self.__tokdict ) )
-
-    def __str__( self ):
-        return '[' + ', '.join(_ustr(i) if isinstance(i, ParseResults) else repr(i) for i in self.__toklist) + ']'
-
-    def _asStringList( self, sep='' ):
-        out = []
-        for item in self.__toklist:
-            if out and sep:
-                out.append(sep)
-            if isinstance( item, ParseResults ):
-                out += item._asStringList()
-            else:
-                out.append( _ustr(item) )
-        return out
-
-    def asList( self ):
-        """
-        Returns the parse results as a nested list of matching tokens, all converted to strings.
-
-        Example::
-
-            patt = OneOrMore(Word(alphas))
-            result = patt.parseString("sldkj lsdkj sldkj")
-            # even though the result prints in string-like form, it is actually a pyparsing ParseResults
-            print(type(result), result) # -> <class 'pyparsing.ParseResults'> ['sldkj', 'lsdkj', 'sldkj']
-
-            # Use asList() to create an actual list
-            result_list = result.asList()
-            print(type(result_list), result_list) # -> <class 'list'> ['sldkj', 'lsdkj', 'sldkj']
-        """
-        return [res.asList() if isinstance(res,ParseResults) else res for res in self.__toklist]
-
-    def asDict( self ):
-        """
-        Returns the named parse results as a nested dictionary.
-
-        Example::
-
-            integer = Word(nums)
-            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
-
-            result = date_str.parseString('12/31/1999')
-            print(type(result), repr(result)) # -> <class 'pyparsing.ParseResults'> (['12', '/', '31', '/', '1999'], {'day': [('1999', 4)], 'year': [('12', 0)], 'month': [('31', 2)]})
-
-            result_dict = result.asDict()
-            print(type(result_dict), repr(result_dict)) # -> <class 'dict'> {'day': '1999', 'year': '12', 'month': '31'}
-
-            # even though a ParseResults supports dict-like access, sometime you just need to have a dict
-            import json
-            print(json.dumps(result)) # -> Exception: TypeError: ... is not JSON serializable
-            print(json.dumps(result.asDict())) # -> {"month": "31", "day": "1999", "year": "12"}
-        """
-        if PY_3:
-            item_fn = self.items
-        else:
-            item_fn = self.iteritems
-
-        def toItem(obj):
-            if isinstance(obj, ParseResults):
-                if obj.haskeys():
-                    return obj.asDict()
-                else:
-                    return [toItem(v) for v in obj]
-            else:
-                return obj
-
-        return dict((k,toItem(v)) for k,v in item_fn())
-
-    def copy( self ):
-        """
-        Returns a new copy of a :class:`ParseResults` object.
-        """
-        ret = ParseResults( self.__toklist )
-        ret.__tokdict = dict(self.__tokdict.items())
-        ret.__parent = self.__parent
-        ret.__accumNames.update( self.__accumNames )
-        ret.__name = self.__name
-        return ret
-
-    def asXML( self, doctag=None, namedItemsOnly=False, indent="", formatted=True ):
-        """
-        (Deprecated) Returns the parse results as XML. Tags are created for tokens and lists that have defined results names.
-        """
-        nl = "\n"
-        out = []
-        namedItems = dict((v[1],k) for (k,vlist) in self.__tokdict.items()
-                                                            for v in vlist)
-        nextLevelIndent = indent + "  "
-
-        # collapse out indents if formatting is not desired
-        if not formatted:
-            indent = ""
-            nextLevelIndent = ""
-            nl = ""
-
-        selfTag = None
-        if doctag is not None:
-            selfTag = doctag
-        else:
-            if self.__name:
-                selfTag = self.__name
-
-        if not selfTag:
-            if namedItemsOnly:
-                return ""
-            else:
-                selfTag = "ITEM"
-
-        out += [ nl, indent, "<", selfTag, ">" ]
-
-        for i,res in enumerate(self.__toklist):
-            if isinstance(res,ParseResults):
-                if i in namedItems:
-                    out += [ res.asXML(namedItems[i],
-                                        namedItemsOnly and doctag is None,
-                                        nextLevelIndent,
-                                        formatted)]
-                else:
-                    out += [ res.asXML(None,
-                                        namedItemsOnly and doctag is None,
-                                        nextLevelIndent,
-                                        formatted)]
-            else:
-                # individual token, see if there is a name for it
-                resTag = None
-                if i in namedItems:
-                    resTag = namedItems[i]
-                if not resTag:
-                    if namedItemsOnly:
-                        continue
-                    else:
-                        resTag = "ITEM"
-                xmlBodyText = _xml_escape(_ustr(res))
-                out += [ nl, nextLevelIndent, "<", resTag, ">",
-                                                xmlBodyText,
-                                                "</", resTag, ">" ]
-
-        out += [ nl, indent, "</", selfTag, ">" ]
-        return "".join(out)
-
-    def __lookup(self,sub):
-        for k,vlist in self.__tokdict.items():
-            for v,loc in vlist:
-                if sub is v:
-                    return k
-        return None
-
-    def getName(self):
-        r"""
-        Returns the results name for this token expression. Useful when several
-        different expressions might match at a particular location.
-
-        Example::
-
-            integer = Word(nums)
-            ssn_expr = Regex(r"\d\d\d-\d\d-\d\d\d\d")
-            house_number_expr = Suppress('#') + Word(nums, alphanums)
-            user_data = (Group(house_number_expr)("house_number")
-                        | Group(ssn_expr)("ssn")
-                        | Group(integer)("age"))
-            user_info = OneOrMore(user_data)
-
-            result = user_info.parseString("22 111-22-3333 #221B")
-            for item in result:
-                print(item.getName(), ':', item[0])
-
-        prints::
-
-            age : 22
-            ssn : 111-22-3333
-            house_number : 221B
-        """
-        if self.__name:
-            return self.__name
-        elif self.__parent:
-            par = self.__parent()
-            if par:
-                return par.__lookup(self)
-            else:
-                return None
-        elif (len(self) == 1 and
-               len(self.__tokdict) == 1 and
-               next(iter(self.__tokdict.values()))[0][1] in (0,-1)):
-            return next(iter(self.__tokdict.keys()))
-        else:
-            return None
-
-    def dump(self, indent='', depth=0, full=True):
-        """
-        Diagnostic method for listing out the contents of
-        a :class:`ParseResults`. Accepts an optional ``indent`` argument so
-        that this string can be embedded in a nested display of other data.
-
-        Example::
-
-            integer = Word(nums)
-            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
-
-            result = date_str.parseString('12/31/1999')
-            print(result.dump())
-
-        prints::
-
-            ['12', '/', '31', '/', '1999']
-            - day: 1999
-            - month: 31
-            - year: 12
-        """
-        out = []
-        NL = '\n'
-        out.append( indent+_ustr(self.asList()) )
-        if full:
-            if self.haskeys():
-                items = sorted((str(k), v) for k,v in self.items())
-                for k,v in items:
-                    if out:
-                        out.append(NL)
-                    out.append( "%s%s- %s: " % (indent,('  '*depth), k) )
-                    if isinstance(v,ParseResults):
-                        if v:
-                            out.append( v.dump(indent,depth+1) )
-                        else:
-                            out.append(_ustr(v))
-                    else:
-                        out.append(repr(v))
-            elif any(isinstance(vv,ParseResults) for vv in self):
-                v = self
-                for i,vv in enumerate(v):
-                    if isinstance(vv,ParseResults):
-                        out.append("\n%s%s[%d]:\n%s%s%s" % (indent,('  '*(depth)),i,indent,('  '*(depth+1)),vv.dump(indent,depth+1) ))
-                    else:
-                        out.append("\n%s%s[%d]:\n%s%s%s" % (indent,('  '*(depth)),i,indent,('  '*(depth+1)),_ustr(vv)))
-
-        return "".join(out)
-
-    def pprint(self, *args, **kwargs):
-        """
-        Pretty-printer for parsed results as a list, using the
-        `pprint <https://docs.python.org/3/library/pprint.html>`_ module.
-        Accepts additional positional or keyword args as defined for
-        `pprint.pprint <https://docs.python.org/3/library/pprint.html#pprint.pprint>`_ .
-
-        Example::
-
-            ident = Word(alphas, alphanums)
-            num = Word(nums)
-            func = Forward()
-            term = ident | num | Group('(' + func + ')')
-            func <<= ident + Group(Optional(delimitedList(term)))
-            result = func.parseString("fna a,b,(fnb c,d,200),100")
-            result.pprint(width=40)
-
-        prints::
-
-            ['fna',
-             ['a',
-              'b',
-              ['(', 'fnb', ['c', 'd', '200'], ')'],
-              '100']]
-        """
-        pprint.pprint(self.asList(), *args, **kwargs)
-
-    # add support for pickle protocol
-    def __getstate__(self):
-        return ( self.__toklist,
-                 ( self.__tokdict.copy(),
-                   self.__parent is not None and self.__parent() or None,
-                   self.__accumNames,
-                   self.__name ) )
-
-    def __setstate__(self,state):
-        self.__toklist = state[0]
-        (self.__tokdict,
-         par,
-         inAccumNames,
-         self.__name) = state[1]
-        self.__accumNames = {}
-        self.__accumNames.update(inAccumNames)
-        if par is not None:
-            self.__parent = wkref(par)
-        else:
-            self.__parent = None
-
-    def __getnewargs__(self):
-        return self.__toklist, self.__name, self.__asList, self.__modal
-
-    def __dir__(self):
-        return (dir(type(self)) + list(self.keys()))
-
-MutableMapping.register(ParseResults)
-
-def col (loc,strg):
-    """Returns current column within a string, counting newlines as line separators.
-   The first column is number 1.
-
-   Note: the default parsing behavior is to expand tabs in the input string
-   before starting the parsing process.  See
-   :class:`ParserElement.parseString` for more
-   information on parsing strings containing ``<TAB>`` s, and suggested
-   methods to maintain a consistent view of the parsed string, the parse
-   location, and line and column positions within the parsed string.
-   """
-    s = strg
-    return 1 if 0<loc<len(s) and s[loc-1] == '\n' else loc - s.rfind("\n", 0, loc)
-
-def lineno(loc,strg):
-    """Returns current line number within a string, counting newlines as line separators.
-    The first line is number 1.
-
-    Note - the default parsing behavior is to expand tabs in the input string
-    before starting the parsing process.  See :class:`ParserElement.parseString`
-    for more information on parsing strings containing ``<TAB>`` s, and
-    suggested methods to maintain a consistent view of the parsed string, the
-    parse location, and line and column positions within the parsed string.
-    """
-    return strg.count("\n",0,loc) + 1
-
-def line( loc, strg ):
-    """Returns the line of text containing loc within a string, counting newlines as line separators.
-       """
-    lastCR = strg.rfind("\n", 0, loc)
-    nextCR = strg.find("\n", loc)
-    if nextCR >= 0:
-        return strg[lastCR+1:nextCR]
-    else:
-        return strg[lastCR+1:]
-
-def _defaultStartDebugAction( instring, loc, expr ):
-    print (("Match " + _ustr(expr) + " at loc " + _ustr(loc) + "(%d,%d)" % ( lineno(loc,instring), col(loc,instring) )))
-
-def _defaultSuccessDebugAction( instring, startloc, endloc, expr, toks ):
-    print ("Matched " + _ustr(expr) + " -> " + str(toks.asList()))
-
-def _defaultExceptionDebugAction( instring, loc, expr, exc ):
-    print ("Exception raised:" + _ustr(exc))
-
-def nullDebugAction(*args):
-    """'Do-nothing' debug action, to suppress debugging output during parsing."""
-    pass
-
-# Only works on Python 3.x - nonlocal is toxic to Python 2 installs
-#~ 'decorator to trim function calls to match the arity of the target'
-#~ def _trim_arity(func, maxargs=3):
-    #~ if func in singleArgBuiltins:
-        #~ return lambda s,l,t: func(t)
-    #~ limit = 0
-    #~ foundArity = False
-    #~ def wrapper(*args):
-        #~ nonlocal limit,foundArity
-        #~ while 1:
-            #~ try:
-                #~ ret = func(*args[limit:])
-                #~ foundArity = True
-                #~ return ret
-            #~ except TypeError:
-                #~ if limit == maxargs or foundArity:
-                    #~ raise
-                #~ limit += 1
-                #~ continue
-    #~ return wrapper
-
-# this version is Python 2.x-3.x cross-compatible
-'decorator to trim function calls to match the arity of the target'
-def _trim_arity(func, maxargs=2):
-    if func in singleArgBuiltins:
-        return lambda s,l,t: func(t)
-    limit = [0]
-    foundArity = [False]
-
-    # traceback return data structure changed in Py3.5 - normalize back to plain tuples
-    if system_version[:2] >= (3,5):
-        def extract_stack(limit=0):
-            # special handling for Python 3.5.0 - extra deep call stack by 1
-            offset = -3 if system_version == (3,5,0) else -2
-            frame_summary = traceback.extract_stack(limit=-offset+limit-1)[offset]
-            return [frame_summary[:2]]
-        def extract_tb(tb, limit=0):
-            frames = traceback.extract_tb(tb, limit=limit)
-            frame_summary = frames[-1]
-            return [frame_summary[:2]]
-    else:
-        extract_stack = traceback.extract_stack
-        extract_tb = traceback.extract_tb
-
-    # synthesize what would be returned by traceback.extract_stack at the call to
-    # user's parse action 'func', so that we don't incur call penalty at parse time
-
-    LINE_DIFF = 6
-    # IF ANY CODE CHANGES, EVEN JUST COMMENTS OR BLANK LINES, BETWEEN THE NEXT LINE AND
-    # THE CALL TO FUNC INSIDE WRAPPER, LINE_DIFF MUST BE MODIFIED!!!!
-    this_line = extract_stack(limit=2)[-1]
-    pa_call_line_synth = (this_line[0], this_line[1]+LINE_DIFF)
-
-    def wrapper(*args):
-        while 1:
-            try:
-                ret = func(*args[limit[0]:])
-                foundArity[0] = True
-                return ret
-            except TypeError:
-                # re-raise TypeErrors if they did not come from our arity testing
-                if foundArity[0]:
-                    raise
-                else:
-                    try:
-                        tb = sys.exc_info()[-1]
-                        if not extract_tb(tb, limit=2)[-1][:2] == pa_call_line_synth:
-                            raise
-                    finally:
-                        del tb
-
-                if limit[0] <= maxargs:
-                    limit[0] += 1
-                    continue
-                raise
-
-    # copy func name to wrapper for sensible debug output
-    func_name = "<parse action>"
-    try:
-        func_name = getattr(func, '__name__',
-                            getattr(func, '__class__').__name__)
-    except Exception:
-        func_name = str(func)
-    wrapper.__name__ = func_name
-
-    return wrapper
-
-class ParserElement(object):
-    """Abstract base level parser element class."""
-    DEFAULT_WHITE_CHARS = " \n\t\r"
-    verbose_stacktrace = False
-
-    @staticmethod
-    def setDefaultWhitespaceChars( chars ):
-        r"""
-        Overrides the default whitespace chars
-
-        Example::
-
-            # default whitespace chars are space, <TAB> and newline
-            OneOrMore(Word(alphas)).parseString("abc def\nghi jkl")  # -> ['abc', 'def', 'ghi', 'jkl']
-
-            # change to just treat newline as significant
-            ParserElement.setDefaultWhitespaceChars(" \t")
-            OneOrMore(Word(alphas)).parseString("abc def\nghi jkl")  # -> ['abc', 'def']
-        """
-        ParserElement.DEFAULT_WHITE_CHARS = chars
-
-    @staticmethod
-    def inlineLiteralsUsing(cls):
-        """
-        Set class to be used for inclusion of string literals into a parser.
-
-        Example::
-
-            # default literal class used is Literal
-            integer = Word(nums)
-            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
-
-            date_str.parseString("1999/12/31")  # -> ['1999', '/', '12', '/', '31']
-
-
-            # change to Suppress
-            ParserElement.inlineLiteralsUsing(Suppress)
-            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
-
-            date_str.parseString("1999/12/31")  # -> ['1999', '12', '31']
-        """
-        ParserElement._literalStringClass = cls
-
-    def __init__( self, savelist=False ):
-        self.parseAction = list()
-        self.failAction = None
-        #~ self.name = "<unknown>"  # don't define self.name, let subclasses try/except upcall
-        self.strRepr = None
-        self.resultsName = None
-        self.saveAsList = savelist
-        self.skipWhitespace = True
-        self.whiteChars = set(ParserElement.DEFAULT_WHITE_CHARS)
-        self.copyDefaultWhiteChars = True
-        self.mayReturnEmpty = False # used when checking for left-recursion
-        self.keepTabs = False
-        self.ignoreExprs = list()
-        self.debug = False
-        self.streamlined = False
-        self.mayIndexError = True # used to optimize exception handling for subclasses that don't advance parse index
-        self.errmsg = ""
-        self.modalResults = True # used to mark results names as modal (report only last) or cumulative (list all)
-        self.debugActions = ( None, None, None ) #custom debug actions
-        self.re = None
-        self.callPreparse = True # used to avoid redundant calls to preParse
-        self.callDuringTry = False
-
-    def copy( self ):
-        """
-        Make a copy of this :class:`ParserElement`.  Useful for defining
-        different parse actions for the same parsing pattern, using copies of
-        the original parse element.
-
-        Example::
-
-            integer = Word(nums).setParseAction(lambda toks: int(toks[0]))
-            integerK = integer.copy().addParseAction(lambda toks: toks[0]*1024) + Suppress("K")
-            integerM = integer.copy().addParseAction(lambda toks: toks[0]*1024*1024) + Suppress("M")
-
-            print(OneOrMore(integerK | integerM | integer).parseString("5K 100 640K 256M"))
-
-        prints::
-
-            [5120, 100, 655360, 268435456]
-
-        Equivalent form of ``expr.copy()`` is just ``expr()``::
-
-            integerM = integer().addParseAction(lambda toks: toks[0]*1024*1024) + Suppress("M")
-        """
-        cpy = copy.copy( self )
-        cpy.parseAction = self.parseAction[:]
-        cpy.ignoreExprs = self.ignoreExprs[:]
-        if self.copyDefaultWhiteChars:
-            cpy.whiteChars = ParserElement.DEFAULT_WHITE_CHARS
-        return cpy
-
-    def setName( self, name ):
-        """
-        Define name for this expression, makes debugging and exception messages clearer.
-
-        Example::
-
-            Word(nums).parseString("ABC")  # -> Exception: Expected W:(0123...) (at char 0), (line:1, col:1)
-            Word(nums).setName("integer").parseString("ABC")  # -> Exception: Expected integer (at char 0), (line:1, col:1)
-        """
-        self.name = name
-        self.errmsg = "Expected " + self.name
-        if hasattr(self,"exception"):
-            self.exception.msg = self.errmsg
-        return self
-
-    def setResultsName( self, name, listAllMatches=False ):
-        """
-        Define name for referencing matching tokens as a nested attribute
-        of the returned parse results.
-        NOTE: this returns a *copy* of the original :class:`ParserElement` object;
-        this is so that the client can define a basic element, such as an
-        integer, and reference it in multiple places with different names.
-
-        You can also set results names using the abbreviated syntax,
-        ``expr("name")`` in place of ``expr.setResultsName("name")``
-        - see :class:`__call__`.
-
-        Example::
-
-            date_str = (integer.setResultsName("year") + '/'
-                        + integer.setResultsName("month") + '/'
-                        + integer.setResultsName("day"))
-
-            # equivalent form:
-            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
-        """
-        newself = self.copy()
-        if name.endswith("*"):
-            name = name[:-1]
-            listAllMatches=True
-        newself.resultsName = name
-        newself.modalResults = not listAllMatches
-        return newself
-
-    def setBreak(self,breakFlag = True):
-        """Method to invoke the Python pdb debugger when this element is
-           about to be parsed. Set ``breakFlag`` to True to enable, False to
-           disable.
-        """
-        if breakFlag:
-            _parseMethod = self._parse
-            def breaker(instring, loc, doActions=True, callPreParse=True):
-                import pdb
-                pdb.set_trace()
-                return _parseMethod( instring, loc, doActions, callPreParse )
-            breaker._originalParseMethod = _parseMethod
-            self._parse = breaker
-        else:
-            if hasattr(self._parse,"_originalParseMethod"):
-                self._parse = self._parse._originalParseMethod
-        return self
-
-    def setParseAction( self, *fns, **kwargs ):
-        """
-        Define one or more actions to perform when successfully matching parse element definition.
-        Parse action fn is a callable method with 0-3 arguments, called as ``fn(s,loc,toks)`` ,
-        ``fn(loc,toks)`` , ``fn(toks)`` , or just ``fn()`` , where:
-
-        - s   = the original string being parsed (see note below)
-        - loc = the location of the matching substring
-        - toks = a list of the matched tokens, packaged as a :class:`ParseResults` object
-
-        If the functions in fns modify the tokens, they can return them as the return
-        value from fn, and the modified list of tokens will replace the original.
-        Otherwise, fn does not need to return any value.
-
-        Optional keyword arguments:
-        - callDuringTry = (default= ``False`` ) indicate if parse action should be run during lookaheads and alternate testing
-
-        Note: the default parsing behavior is to expand tabs in the input string
-        before starting the parsing process.  See :class:`parseString for more
-        information on parsing strings containing ``<TAB>`` s, and suggested
-        methods to maintain a consistent view of the parsed string, the parse
-        location, and line and column positions within the parsed string.
-
-        Example::
-
-            integer = Word(nums)
-            date_str = integer + '/' + integer + '/' + integer
-
-            date_str.parseString("1999/12/31")  # -> ['1999', '/', '12', '/', '31']
-
-            # use parse action to convert to ints at parse time
-            integer = Word(nums).setParseAction(lambda toks: int(toks[0]))
-            date_str = integer + '/' + integer + '/' + integer
-
-            # note that integer fields are now ints, not strings
-            date_str.parseString("1999/12/31")  # -> [1999, '/', 12, '/', 31]
-        """
-        self.parseAction = list(map(_trim_arity, list(fns)))
-        self.callDuringTry = kwargs.get("callDuringTry", False)
-        return self
-
-    def addParseAction( self, *fns, **kwargs ):
-        """
-        Add one or more parse actions to expression's list of parse actions. See :class:`setParseAction`.
-
-        See examples in :class:`copy`.
-        """
-        self.parseAction += list(map(_trim_arity, list(fns)))
-        self.callDuringTry = self.callDuringTry or kwargs.get("callDuringTry", False)
-        return self
-
-    def addCondition(self, *fns, **kwargs):
-        """Add a boolean predicate function to expression's list of parse actions. See
-        :class:`setParseAction` for function call signatures. Unlike ``setParseAction``,
-        functions passed to ``addCondition`` need to return boolean success/fail of the condition.
-
-        Optional keyword arguments:
-        - message = define a custom message to be used in the raised exception
-        - fatal   = if True, will raise ParseFatalException to stop parsing immediately; otherwise will raise ParseException
-
-        Example::
-
-            integer = Word(nums).setParseAction(lambda toks: int(toks[0]))
-            year_int = integer.copy()
-            year_int.addCondition(lambda toks: toks[0] >= 2000, message="Only support years 2000 and later")
-            date_str = year_int + '/' + integer + '/' + integer
-
-            result = date_str.parseString("1999/12/31")  # -> Exception: Only support years 2000 and later (at char 0), (line:1, col:1)
-        """
-        msg = kwargs.get("message", "failed user-defined condition")
-        exc_type = ParseFatalException if kwargs.get("fatal", False) else ParseException
-        for fn in fns:
-            fn = _trim_arity(fn)
-            def pa(s,l,t):
-                if not bool(fn(s,l,t)):
-                    raise exc_type(s,l,msg)
-            self.parseAction.append(pa)
-        self.callDuringTry = self.callDuringTry or kwargs.get("callDuringTry", False)
-        return self
-
-    def setFailAction( self, fn ):
-        """Define action to perform if parsing fails at this expression.
-           Fail acton fn is a callable function that takes the arguments
-           ``fn(s,loc,expr,err)`` where:
-           - s = string being parsed
-           - loc = location where expression match was attempted and failed
-           - expr = the parse expression that failed
-           - err = the exception thrown
-           The function returns no value.  It may throw :class:`ParseFatalException`
-           if it is desired to stop parsing immediately."""
-        self.failAction = fn
-        return self
-
-    def _skipIgnorables( self, instring, loc ):
-        exprsFound = True
-        while exprsFound:
-            exprsFound = False
-            for e in self.ignoreExprs:
-                try:
-                    while 1:
-                        loc,dummy = e._parse( instring, loc )
-                        exprsFound = True
-                except ParseException:
-                    pass
-        return loc
-
-    def preParse( self, instring, loc ):
-        if self.ignoreExprs:
-            loc = self._skipIgnorables( instring, loc )
-
-        if self.skipWhitespace:
-            wt = self.whiteChars
-            instrlen = len(instring)
-            while loc < instrlen and instring[loc] in wt:
-                loc += 1
-
-        return loc
-
-    def parseImpl( self, instring, loc, doActions=True ):
-        return loc, []
-
-    def postParse( self, instring, loc, tokenlist ):
-        return tokenlist
-
-    #~ @profile
-    def _parseNoCache( self, instring, loc, doActions=True, callPreParse=True ):
-        debugging = ( self.debug ) #and doActions )
-
-        if debugging or self.failAction:
-            #~ print ("Match",self,"at loc",loc,"(%d,%d)" % ( lineno(loc,instring), col(loc,instring) ))
-            if (self.debugActions[0] ):
-                self.debugActions[0]( instring, loc, self )
-            if callPreParse and self.callPreparse:
-                preloc = self.preParse( instring, loc )
-            else:
-                preloc = loc
-            tokensStart = preloc
-            try:
-                try:
-                    loc,tokens = self.parseImpl( instring, preloc, doActions )
-                except IndexError:
-                    raise ParseException( instring, len(instring), self.errmsg, self )
-            except ParseBaseException as err:
-                #~ print ("Exception raised:", err)
-                if self.debugActions[2]:
-                    self.debugActions[2]( instring, tokensStart, self, err )
-                if self.failAction:
-                    self.failAction( instring, tokensStart, self, err )
-                raise
-        else:
-            if callPreParse and self.callPreparse:
-                preloc = self.preParse( instring, loc )
-            else:
-                preloc = loc
-            tokensStart = preloc
-            if self.mayIndexError or preloc >= len(instring):
-                try:
-                    loc,tokens = self.parseImpl( instring, preloc, doActions )
-                except IndexError:
-                    raise ParseException( instring, len(instring), self.errmsg, self )
-            else:
-                loc,tokens = self.parseImpl( instring, preloc, doActions )
-
-        tokens = self.postParse( instring, loc, tokens )
-
-        retTokens = ParseResults( tokens, self.resultsName, asList=self.saveAsList, modal=self.modalResults )
-        if self.parseAction and (doActions or self.callDuringTry):
-            if debugging:
-                try:
-                    for fn in self.parseAction:
-                        try:
-                            tokens = fn( instring, tokensStart, retTokens )
-                        except IndexError as parse_action_exc:
-                            exc = ParseException("exception raised in parse action")
-                            exc.__cause__ = parse_action_exc
-                            raise exc
-
-                        if tokens is not None and tokens is not retTokens:
-                            retTokens = ParseResults( tokens,
-                                                      self.resultsName,
-                                                      asList=self.saveAsList and isinstance(tokens,(ParseResults,list)),
-                                                      modal=self.modalResults )
-                except ParseBaseException as err:
-                    #~ print "Exception raised in user parse action:", err
-                    if (self.debugActions[2] ):
-                        self.debugActions[2]( instring, tokensStart, self, err )
-                    raise
-            else:
-                for fn in self.parseAction:
-                    try:
-                        tokens = fn( instring, tokensStart, retTokens )
-                    except IndexError as parse_action_exc:
-                        exc = ParseException("exception raised in parse action")
-                        exc.__cause__ = parse_action_exc
-                        raise exc
-
-                    if tokens is not None and tokens is not retTokens:
-                        retTokens = ParseResults( tokens,
-                                                  self.resultsName,
-                                                  asList=self.saveAsList and isinstance(tokens,(ParseResults,list)),
-                                                  modal=self.modalResults )
-        if debugging:
-            #~ print ("Matched",self,"->",retTokens.asList())
-            if (self.debugActions[1] ):
-                self.debugActions[1]( instring, tokensStart, loc, self, retTokens )
-
-        return loc, retTokens
-
-    def tryParse( self, instring, loc ):
-        try:
-            return self._parse( instring, loc, doActions=False )[0]
-        except ParseFatalException:
-            raise ParseException( instring, loc, self.errmsg, self)
-
-    def canParseNext(self, instring, loc):
-        try:
-            self.tryParse(instring, loc)
-        except (ParseException, IndexError):
-            return False
-        else:
-            return True
-
-    class _UnboundedCache(object):
-        def __init__(self):
-            cache = {}
-            self.not_in_cache = not_in_cache = object()
-
-            def get(self, key):
-                return cache.get(key, not_in_cache)
-
-            def set(self, key, value):
-                cache[key] = value
-
-            def clear(self):
-                cache.clear()
-
-            def cache_len(self):
-                return len(cache)
-
-            self.get = types.MethodType(get, self)
-            self.set = types.MethodType(set, self)
-            self.clear = types.MethodType(clear, self)
-            self.__len__ = types.MethodType(cache_len, self)
-
-    if _OrderedDict is not None:
-        class _FifoCache(object):
-            def __init__(self, size):
-                self.not_in_cache = not_in_cache = object()
-
-                cache = _OrderedDict()
-
-                def get(self, key):
-                    return cache.get(key, not_in_cache)
-
-                def set(self, key, value):
-                    cache[key] = value
-                    while len(cache) > size:
-                        try:
-                            cache.popitem(False)
-                        except KeyError:
-                            pass
-
-                def clear(self):
-                    cache.clear()
-
-                def cache_len(self):
-                    return len(cache)
-
-                self.get = types.MethodType(get, self)
-                self.set = types.MethodType(set, self)
-                self.clear = types.MethodType(clear, self)
-                self.__len__ = types.MethodType(cache_len, self)
-
-    else:
-        class _FifoCache(object):
-            def __init__(self, size):
-                self.not_in_cache = not_in_cache = object()
-
-                cache = {}
-                key_fifo = collections.deque([], size)
-
-                def get(self, key):
-                    return cache.get(key, not_in_cache)
-
-                def set(self, key, value):
-                    cache[key] = value
-                    while len(key_fifo) > size:
-                        cache.pop(key_fifo.popleft(), None)
-                    key_fifo.append(key)
-
-                def clear(self):
-                    cache.clear()
-                    key_fifo.clear()
-
-                def cache_len(self):
-                    return len(cache)
-
-                self.get = types.MethodType(get, self)
-                self.set = types.MethodType(set, self)
-                self.clear = types.MethodType(clear, self)
-                self.__len__ = types.MethodType(cache_len, self)
-
-    # argument cache for optimizing repeated calls when backtracking through recursive expressions
-    packrat_cache = {} # this is set later by enabledPackrat(); this is here so that resetCache() doesn't fail
-    packrat_cache_lock = RLock()
-    packrat_cache_stats = [0, 0]
-
-    # this method gets repeatedly called during backtracking with the same arguments -
-    # we can cache these arguments and save ourselves the trouble of re-parsing the contained expression
-    def _parseCache( self, instring, loc, doActions=True, callPreParse=True ):
-        HIT, MISS = 0, 1
-        lookup = (self, instring, loc, callPreParse, doActions)
-        with ParserElement.packrat_cache_lock:
-            cache = ParserElement.packrat_cache
-            value = cache.get(lookup)
-            if value is cache.not_in_cache:
-                ParserElement.packrat_cache_stats[MISS] += 1
-                try:
-                    value = self._parseNoCache(instring, loc, doActions, callPreParse)
-                except ParseBaseException as pe:
-                    # cache a copy of the exception, without the traceback
-                    cache.set(lookup, pe.__class__(*pe.args))
-                    raise
-                else:
-                    cache.set(lookup, (value[0], value[1].copy()))
-                    return value
-            else:
-                ParserElement.packrat_cache_stats[HIT] += 1
-                if isinstance(value, Exception):
-                    raise value
-                return (value[0], value[1].copy())
-
-    _parse = _parseNoCache
-
-    @staticmethod
-    def resetCache():
-        ParserElement.packrat_cache.clear()
-        ParserElement.packrat_cache_stats[:] = [0] * len(ParserElement.packrat_cache_stats)
-
-    _packratEnabled = False
-    @staticmethod
-    def enablePackrat(cache_size_limit=128):
-        """Enables "packrat" parsing, which adds memoizing to the parsing logic.
-           Repeated parse attempts at the same string location (which happens
-           often in many complex grammars) can immediately return a cached value,
-           instead of re-executing parsing/validating code.  Memoizing is done of
-           both valid results and parsing exceptions.
-
-           Parameters:
-
-           - cache_size_limit - (default= ``128``) - if an integer value is provided
-             will limit the size of the packrat cache; if None is passed, then
-             the cache size will be unbounded; if 0 is passed, the cache will
-             be effectively disabled.
-
-           This speedup may break existing programs that use parse actions that
-           have side-effects.  For this reason, packrat parsing is disabled when
-           you first import pyparsing.  To activate the packrat feature, your
-           program must call the class method :class:`ParserElement.enablePackrat`.
-           For best results, call ``enablePackrat()`` immediately after
-           importing pyparsing.
-
-           Example::
-
-               from pip._vendor import pyparsing
-               pyparsing.ParserElement.enablePackrat()
-        """
-        if not ParserElement._packratEnabled:
-            ParserElement._packratEnabled = True
-            if cache_size_limit is None:
-                ParserElement.packrat_cache = ParserElement._UnboundedCache()
-            else:
-                ParserElement.packrat_cache = ParserElement._FifoCache(cache_size_limit)
-            ParserElement._parse = ParserElement._parseCache
-
-    def parseString( self, instring, parseAll=False ):
-        """
-        Execute the parse expression with the given string.
-        This is the main interface to the client code, once the complete
-        expression has been built.
-
-        If you want the grammar to require that the entire input string be
-        successfully parsed, then set ``parseAll`` to True (equivalent to ending
-        the grammar with ``StringEnd()``).
-
-        Note: ``parseString`` implicitly calls ``expandtabs()`` on the input string,
-        in order to report proper column numbers in parse actions.
-        If the input string contains tabs and
-        the grammar uses parse actions that use the ``loc`` argument to index into the
-        string being parsed, you can ensure you have a consistent view of the input
-        string by:
-
-        - calling ``parseWithTabs`` on your grammar before calling ``parseString``
-          (see :class:`parseWithTabs`)
-        - define your parse action using the full ``(s,loc,toks)`` signature, and
-          reference the input string using the parse action's ``s`` argument
-        - explictly expand the tabs in your input string before calling
-          ``parseString``
-
-        Example::
-
-            Word('a').parseString('aaaaabaaa')  # -> ['aaaaa']
-            Word('a').parseString('aaaaabaaa', parseAll=True)  # -> Exception: Expected end of text
-        """
-        ParserElement.resetCache()
-        if not self.streamlined:
-            self.streamline()
-            #~ self.saveAsList = True
-        for e in self.ignoreExprs:
-            e.streamline()
-        if not self.keepTabs:
-            instring = instring.expandtabs()
-        try:
-            loc, tokens = self._parse( instring, 0 )
-            if parseAll:
-                loc = self.preParse( instring, loc )
-                se = Empty() + StringEnd()
-                se._parse( instring, loc )
-        except ParseBaseException as exc:
-            if ParserElement.verbose_stacktrace:
-                raise
-            else:
-                # catch and re-raise exception from here, clears out pyparsing internal stack trace
-                raise exc
-        else:
-            return tokens
-
-    def scanString( self, instring, maxMatches=_MAX_INT, overlap=False ):
-        """
-        Scan the input string for expression matches.  Each match will return the
-        matching tokens, start location, and end location.  May be called with optional
-        ``maxMatches`` argument, to clip scanning after 'n' matches are found.  If
-        ``overlap`` is specified, then overlapping matches will be reported.
-
-        Note that the start and end locations are reported relative to the string
-        being parsed.  See :class:`parseString` for more information on parsing
-        strings with embedded tabs.
-
-        Example::
-
-            source = "sldjf123lsdjjkf345sldkjf879lkjsfd987"
-            print(source)
-            for tokens,start,end in Word(alphas).scanString(source):
-                print(' '*start + '^'*(end-start))
-                print(' '*start + tokens[0])
-
-        prints::
-
-            sldjf123lsdjjkf345sldkjf879lkjsfd987
-            ^^^^^
-            sldjf
-                    ^^^^^^^
-                    lsdjjkf
-                              ^^^^^^
-                              sldkjf
-                                       ^^^^^^
-                                       lkjsfd
-        """
-        if not self.streamlined:
-            self.streamline()
-        for e in self.ignoreExprs:
-            e.streamline()
-
-        if not self.keepTabs:
-            instring = _ustr(instring).expandtabs()
-        instrlen = len(instring)
-        loc = 0
-        preparseFn = self.preParse
-        parseFn = self._parse
-        ParserElement.resetCache()
-        matches = 0
-        try:
-            while loc <= instrlen and matches < maxMatches:
-                try:
-                    preloc = preparseFn( instring, loc )
-                    nextLoc,tokens = parseFn( instring, preloc, callPreParse=False )
-                except ParseException:
-                    loc = preloc+1
-                else:
-                    if nextLoc > loc:
-                        matches += 1
-                        yield tokens, preloc, nextLoc
-                        if overlap:
-                            nextloc = preparseFn( instring, loc )
-                            if nextloc > loc:
-                                loc = nextLoc
-                            else:
-                                loc += 1
-                        else:
-                            loc = nextLoc
-                    else:
-                        loc = preloc+1
-        except ParseBaseException as exc:
-            if ParserElement.verbose_stacktrace:
-                raise
-            else:
-                # catch and re-raise exception from here, clears out pyparsing internal stack trace
-                raise exc
-
-    def transformString( self, instring ):
-        """
-        Extension to :class:`scanString`, to modify matching text with modified tokens that may
-        be returned from a parse action.  To use ``transformString``, define a grammar and
-        attach a parse action to it that modifies the returned token list.
-        Invoking ``transformString()`` on a target string will then scan for matches,
-        and replace the matched text patterns according to the logic in the parse
-        action.  ``transformString()`` returns the resulting transformed string.
-
-        Example::
-
-            wd = Word(alphas)
-            wd.setParseAction(lambda toks: toks[0].title())
-
-            print(wd.transformString("now is the winter of our discontent made glorious summer by this sun of york."))
-
-        prints::
-
-            Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York.
-        """
-        out = []
-        lastE = 0
-        # force preservation of <TAB>s, to minimize unwanted transformation of string, and to
-        # keep string locs straight between transformString and scanString
-        self.keepTabs = True
-        try:
-            for t,s,e in self.scanString( instring ):
-                out.append( instring[lastE:s] )
-                if t:
-                    if isinstance(t,ParseResults):
-                        out += t.asList()
-                    elif isinstance(t,list):
-                        out += t
-                    else:
-                        out.append(t)
-                lastE = e
-            out.append(instring[lastE:])
-            out = [o for o in out if o]
-            return "".join(map(_ustr,_flatten(out)))
-        except ParseBaseException as exc:
-            if ParserElement.verbose_stacktrace:
-                raise
-            else:
-                # catch and re-raise exception from here, clears out pyparsing internal stack trace
-                raise exc
-
-    def searchString( self, instring, maxMatches=_MAX_INT ):
-        """
-        Another extension to :class:`scanString`, simplifying the access to the tokens found
-        to match the given parse expression.  May be called with optional
-        ``maxMatches`` argument, to clip searching after 'n' matches are found.
-
-        Example::
-
-            # a capitalized word starts with an uppercase letter, followed by zero or more lowercase letters
-            cap_word = Word(alphas.upper(), alphas.lower())
-
-            print(cap_word.searchString("More than Iron, more than Lead, more than Gold I need Electricity"))
-
-            # the sum() builtin can be used to merge results into a single ParseResults object
-            print(sum(cap_word.searchString("More than Iron, more than Lead, more than Gold I need Electricity")))
-
-        prints::
-
-            [['More'], ['Iron'], ['Lead'], ['Gold'], ['I'], ['Electricity']]
-            ['More', 'Iron', 'Lead', 'Gold', 'I', 'Electricity']
-        """
-        try:
-            return ParseResults([ t for t,s,e in self.scanString( instring, maxMatches ) ])
-        except ParseBaseException as exc:
-            if ParserElement.verbose_stacktrace:
-                raise
-            else:
-                # catch and re-raise exception from here, clears out pyparsing internal stack trace
-                raise exc
-
-    def split(self, instring, maxsplit=_MAX_INT, includeSeparators=False):
-        """
-        Generator method to split a string using the given expression as a separator.
-        May be called with optional ``maxsplit`` argument, to limit the number of splits;
-        and the optional ``includeSeparators`` argument (default= ``False``), if the separating
-        matching text should be included in the split results.
-
-        Example::
-
-            punc = oneOf(list(".,;:/-!?"))
-            print(list(punc.split("This, this?, this sentence, is badly punctuated!")))
-
-        prints::
-
-            ['This', ' this', '', ' this sentence', ' is badly punctuated', '']
-        """
-        splits = 0
-        last = 0
-        for t,s,e in self.scanString(instring, maxMatches=maxsplit):
-            yield instring[last:s]
-            if includeSeparators:
-                yield t[0]
-            last = e
-        yield instring[last:]
-
-    def __add__(self, other ):
-        """
-        Implementation of + operator - returns :class:`And`. Adding strings to a ParserElement
-        converts them to :class:`Literal`s by default.
-
-        Example::
-
-            greet = Word(alphas) + "," + Word(alphas) + "!"
-            hello = "Hello, World!"
-            print (hello, "->", greet.parseString(hello))
-
-        prints::
-
-            Hello, World! -> ['Hello', ',', 'World', '!']
-        """
-        if isinstance( other, basestring ):
-            other = ParserElement._literalStringClass( other )
-        if not isinstance( other, ParserElement ):
-            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
-                    SyntaxWarning, stacklevel=2)
-            return None
-        return And( [ self, other ] )
-
-    def __radd__(self, other ):
-        """
-        Implementation of + operator when left operand is not a :class:`ParserElement`
-        """
-        if isinstance( other, basestring ):
-            other = ParserElement._literalStringClass( other )
-        if not isinstance( other, ParserElement ):
-            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
-                    SyntaxWarning, stacklevel=2)
-            return None
-        return other + self
-
-    def __sub__(self, other):
-        """
-        Implementation of - operator, returns :class:`And` with error stop
-        """
-        if isinstance( other, basestring ):
-            other = ParserElement._literalStringClass( other )
-        if not isinstance( other, ParserElement ):
-            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
-                    SyntaxWarning, stacklevel=2)
-            return None
-        return self + And._ErrorStop() + other
-
-    def __rsub__(self, other ):
-        """
-        Implementation of - operator when left operand is not a :class:`ParserElement`
-        """
-        if isinstance( other, basestring ):
-            other = ParserElement._literalStringClass( other )
-        if not isinstance( other, ParserElement ):
-            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
-                    SyntaxWarning, stacklevel=2)
-            return None
-        return other - self
-
-    def __mul__(self,other):
-        """
-        Implementation of * operator, allows use of ``expr * 3`` in place of
-        ``expr + expr + expr``.  Expressions may also me multiplied by a 2-integer
-        tuple, similar to ``{min,max}`` multipliers in regular expressions.  Tuples
-        may also include ``None`` as in:
-         - ``expr*(n,None)`` or ``expr*(n,)`` is equivalent
-              to ``expr*n + ZeroOrMore(expr)``
-              (read as "at least n instances of ``expr``")
-         - ``expr*(None,n)`` is equivalent to ``expr*(0,n)``
-              (read as "0 to n instances of ``expr``")
-         - ``expr*(None,None)`` is equivalent to ``ZeroOrMore(expr)``
-         - ``expr*(1,None)`` is equivalent to ``OneOrMore(expr)``
-
-        Note that ``expr*(None,n)`` does not raise an exception if
-        more than n exprs exist in the input stream; that is,
-        ``expr*(None,n)`` does not enforce a maximum number of expr
-        occurrences.  If this behavior is desired, then write
-        ``expr*(None,n) + ~expr``
-        """
-        if isinstance(other,int):
-            minElements, optElements = other,0
-        elif isinstance(other,tuple):
-            other = (other + (None, None))[:2]
-            if other[0] is None:
-                other = (0, other[1])
-            if isinstance(other[0],int) and other[1] is None:
-                if other[0] == 0:
-                    return ZeroOrMore(self)
-                if other[0] == 1:
-                    return OneOrMore(self)
-                else:
-                    return self*other[0] + ZeroOrMore(self)
-            elif isinstance(other[0],int) and isinstance(other[1],int):
-                minElements, optElements = other
-                optElements -= minElements
-            else:
-                raise TypeError("cannot multiply 'ParserElement' and ('%s','%s') objects", type(other[0]),type(other[1]))
-        else:
-            raise TypeError("cannot multiply 'ParserElement' and '%s' objects", type(other))
-
-        if minElements < 0:
-            raise ValueError("cannot multiply ParserElement by negative value")
-        if optElements < 0:
-            raise ValueError("second tuple value must be greater or equal to first tuple value")
-        if minElements == optElements == 0:
-            raise ValueError("cannot multiply ParserElement by 0 or (0,0)")
-
-        if (optElements):
-            def makeOptionalList(n):
-                if n>1:
-                    return Optional(self + makeOptionalList(n-1))
-                else:
-                    return Optional(self)
-            if minElements:
-                if minElements == 1:
-                    ret = self + makeOptionalList(optElements)
-                else:
-                    ret = And([self]*minElements) + makeOptionalList(optElements)
-            else:
-                ret = makeOptionalList(optElements)
-        else:
-            if minElements == 1:
-                ret = self
-            else:
-                ret = And([self]*minElements)
-        return ret
-
-    def __rmul__(self, other):
-        return self.__mul__(other)
-
-    def __or__(self, other ):
-        """
-        Implementation of | operator - returns :class:`MatchFirst`
-        """
-        if isinstance( other, basestring ):
-            other = ParserElement._literalStringClass( other )
-        if not isinstance( other, ParserElement ):
-            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
-                    SyntaxWarning, stacklevel=2)
-            return None
-        return MatchFirst( [ self, other ] )
-
-    def __ror__(self, other ):
-        """
-        Implementation of | operator when left operand is not a :class:`ParserElement`
-        """
-        if isinstance( other, basestring ):
-            other = ParserElement._literalStringClass( other )
-        if not isinstance( other, ParserElement ):
-            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
-                    SyntaxWarning, stacklevel=2)
-            return None
-        return other | self
-
-    def __xor__(self, other ):
-        """
-        Implementation of ^ operator - returns :class:`Or`
-        """
-        if isinstance( other, basestring ):
-            other = ParserElement._literalStringClass( other )
-        if not isinstance( other, ParserElement ):
-            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
-                    SyntaxWarning, stacklevel=2)
-            return None
-        return Or( [ self, other ] )
-
-    def __rxor__(self, other ):
-        """
-        Implementation of ^ operator when left operand is not a :class:`ParserElement`
-        """
-        if isinstance( other, basestring ):
-            other = ParserElement._literalStringClass( other )
-        if not isinstance( other, ParserElement ):
-            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
-                    SyntaxWarning, stacklevel=2)
-            return None
-        return other ^ self
-
-    def __and__(self, other ):
-        """
-        Implementation of & operator - returns :class:`Each`
-        """
-        if isinstance( other, basestring ):
-            other = ParserElement._literalStringClass( other )
-        if not isinstance( other, ParserElement ):
-            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
-                    SyntaxWarning, stacklevel=2)
-            return None
-        return Each( [ self, other ] )
-
-    def __rand__(self, other ):
-        """
-        Implementation of & operator when left operand is not a :class:`ParserElement`
-        """
-        if isinstance( other, basestring ):
-            other = ParserElement._literalStringClass( other )
-        if not isinstance( other, ParserElement ):
-            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
-                    SyntaxWarning, stacklevel=2)
-            return None
-        return other & self
-
-    def __invert__( self ):
-        """
-        Implementation of ~ operator - returns :class:`NotAny`
-        """
-        return NotAny( self )
-
-    def __call__(self, name=None):
-        """
-        Shortcut for :class:`setResultsName`, with ``listAllMatches=False``.
-
-        If ``name`` is given with a trailing ``'*'`` character, then ``listAllMatches`` will be
-        passed as ``True``.
-
-        If ``name` is omitted, same as calling :class:`copy`.
-
-        Example::
-
-            # these are equivalent
-            userdata = Word(alphas).setResultsName("name") + Word(nums+"-").setResultsName("socsecno")
-            userdata = Word(alphas)("name") + Word(nums+"-")("socsecno")
-        """
-        if name is not None:
-            return self.setResultsName(name)
-        else:
-            return self.copy()
-
-    def suppress( self ):
-        """
-        Suppresses the output of this :class:`ParserElement`; useful to keep punctuation from
-        cluttering up returned output.
-        """
-        return Suppress( self )
-
-    def leaveWhitespace( self ):
-        """
-        Disables the skipping of whitespace before matching the characters in the
-        :class:`ParserElement`'s defined pattern.  This is normally only used internally by
-        the pyparsing module, but may be needed in some whitespace-sensitive grammars.
-        """
-        self.skipWhitespace = False
-        return self
-
-    def setWhitespaceChars( self, chars ):
-        """
-        Overrides the default whitespace chars
-        """
-        self.skipWhitespace = True
-        self.whiteChars = chars
-        self.copyDefaultWhiteChars = False
-        return self
-
-    def parseWithTabs( self ):
-        """
-        Overrides default behavior to expand ``<TAB>``s to spaces before parsing the input string.
-        Must be called before ``parseString`` when the input grammar contains elements that
-        match ``<TAB>`` characters.
-        """
-        self.keepTabs = True
-        return self
-
-    def ignore( self, other ):
-        """
-        Define expression to be ignored (e.g., comments) while doing pattern
-        matching; may be called repeatedly, to define multiple comment or other
-        ignorable patterns.
-
-        Example::
-
-            patt = OneOrMore(Word(alphas))
-            patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj']
-
-            patt.ignore(cStyleComment)
-            patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj', 'lskjd']
-        """
-        if isinstance(other, basestring):
-            other = Suppress(other)
-
-        if isinstance( other, Suppress ):
-            if other not in self.ignoreExprs:
-                self.ignoreExprs.append(other)
-        else:
-            self.ignoreExprs.append( Suppress( other.copy() ) )
-        return self
-
-    def setDebugActions( self, startAction, successAction, exceptionAction ):
-        """
-        Enable display of debugging messages while doing pattern matching.
-        """
-        self.debugActions = (startAction or _defaultStartDebugAction,
-                             successAction or _defaultSuccessDebugAction,
-                             exceptionAction or _defaultExceptionDebugAction)
-        self.debug = True
-        return self
-
-    def setDebug( self, flag=True ):
-        """
-        Enable display of debugging messages while doing pattern matching.
-        Set ``flag`` to True to enable, False to disable.
-
-        Example::
-
-            wd = Word(alphas).setName("alphaword")
-            integer = Word(nums).setName("numword")
-            term = wd | integer
-
-            # turn on debugging for wd
-            wd.setDebug()
-
-            OneOrMore(term).parseString("abc 123 xyz 890")
-
-        prints::
-
-            Match alphaword at loc 0(1,1)
-            Matched alphaword -> ['abc']
-            Match alphaword at loc 3(1,4)
-            Exception raised:Expected alphaword (at char 4), (line:1, col:5)
-            Match alphaword at loc 7(1,8)
-            Matched alphaword -> ['xyz']
-            Match alphaword at loc 11(1,12)
-            Exception raised:Expected alphaword (at char 12), (line:1, col:13)
-            Match alphaword at loc 15(1,16)
-            Exception raised:Expected alphaword (at char 15), (line:1, col:16)
-
-        The output shown is that produced by the default debug actions - custom debug actions can be
-        specified using :class:`setDebugActions`. Prior to attempting
-        to match the ``wd`` expression, the debugging message ``"Match <exprname> at loc <n>(<line>,<col>)"``
-        is shown. Then if the parse succeeds, a ``"Matched"`` message is shown, or an ``"Exception raised"``
-        message is shown. Also note the use of :class:`setName` to assign a human-readable name to the expression,
-        which makes debugging and exception messages easier to understand - for instance, the default
-        name created for the :class:`Word` expression without calling ``setName`` is ``"W:(ABCD...)"``.
-        """
-        if flag:
-            self.setDebugActions( _defaultStartDebugAction, _defaultSuccessDebugAction, _defaultExceptionDebugAction )
-        else:
-            self.debug = False
-        return self
-
-    def __str__( self ):
-        return self.name
-
-    def __repr__( self ):
-        return _ustr(self)
-
-    def streamline( self ):
-        self.streamlined = True
-        self.strRepr = None
-        return self
-
-    def checkRecursion( self, parseElementList ):
-        pass
-
-    def validate( self, validateTrace=[] ):
-        """
-        Check defined expressions for valid structure, check for infinite recursive definitions.
-        """
-        self.checkRecursion( [] )
-
-    def parseFile( self, file_or_filename, parseAll=False ):
-        """
-        Execute the parse expression on the given file or filename.
-        If a filename is specified (instead of a file object),
-        the entire file is opened, read, and closed before parsing.
-        """
-        try:
-            file_contents = file_or_filename.read()
-        except AttributeError:
-            with open(file_or_filename, "r") as f:
-                file_contents = f.read()
-        try:
-            return self.parseString(file_contents, parseAll)
-        except ParseBaseException as exc:
-            if ParserElement.verbose_stacktrace:
-                raise
-            else:
-                # catch and re-raise exception from here, clears out pyparsing internal stack trace
-                raise exc
-
-    def __eq__(self,other):
-        if isinstance(other, ParserElement):
-            return self is other or vars(self) == vars(other)
-        elif isinstance(other, basestring):
-            return self.matches(other)
-        else:
-            return super(ParserElement,self)==other
-
-    def __ne__(self,other):
-        return not (self == other)
-
-    def __hash__(self):
-        return hash(id(self))
-
-    def __req__(self,other):
-        return self == other
-
-    def __rne__(self,other):
-        return not (self == other)
-
-    def matches(self, testString, parseAll=True):
-        """
-        Method for quick testing of a parser against a test string. Good for simple
-        inline microtests of sub expressions while building up larger parser.
-
-        Parameters:
-         - testString - to test against this expression for a match
-         - parseAll - (default= ``True``) - flag to pass to :class:`parseString` when running tests
-
-        Example::
-
-            expr = Word(nums)
-            assert expr.matches("100")
-        """
-        try:
-            self.parseString(_ustr(testString), parseAll=parseAll)
-            return True
-        except ParseBaseException:
-            return False
-
-    def runTests(self, tests, parseAll=True, comment='#',
-                 fullDump=True, printResults=True, failureTests=False, postParse=None):
-        """
-        Execute the parse expression on a series of test strings, showing each
-        test, the parsed results or where the parse failed. Quick and easy way to
-        run a parse expression against a list of sample strings.
-
-        Parameters:
-         - tests - a list of separate test strings, or a multiline string of test strings
-         - parseAll - (default= ``True``) - flag to pass to :class:`parseString` when running tests
-         - comment - (default= ``'#'``) - expression for indicating embedded comments in the test
-              string; pass None to disable comment filtering
-         - fullDump - (default= ``True``) - dump results as list followed by results names in nested outline;
-              if False, only dump nested list
-         - printResults - (default= ``True``) prints test output to stdout
-         - failureTests - (default= ``False``) indicates if these tests are expected to fail parsing
-         - postParse - (default= ``None``) optional callback for successful parse results; called as
-              `fn(test_string, parse_results)` and returns a string to be added to the test output
-
-        Returns: a (success, results) tuple, where success indicates that all tests succeeded
-        (or failed if ``failureTests`` is True), and the results contain a list of lines of each
-        test's output
-
-        Example::
-
-            number_expr = pyparsing_common.number.copy()
-
-            result = number_expr.runTests('''
-                # unsigned integer
-                100
-                # negative integer
-                -100
-                # float with scientific notation
-                6.02e23
-                # integer with scientific notation
-                1e-12
-                ''')
-            print("Success" if result[0] else "Failed!")
-
-            result = number_expr.runTests('''
-                # stray character
-                100Z
-                # missing leading digit before '.'
-                -.100
-                # too many '.'
-                3.14.159
-                ''', failureTests=True)
-            print("Success" if result[0] else "Failed!")
-
-        prints::
-
-            # unsigned integer
-            100
-            [100]
-
-            # negative integer
-            -100
-            [-100]
-
-            # float with scientific notation
-            6.02e23
-            [6.02e+23]
-
-            # integer with scientific notation
-            1e-12
-            [1e-12]
-
-            Success
-
-            # stray character
-            100Z
-               ^
-            FAIL: Expected end of text (at char 3), (line:1, col:4)
-
-            # missing leading digit before '.'
-            -.100
-            ^
-            FAIL: Expected {real number with scientific notation | real number | signed integer} (at char 0), (line:1, col:1)
-
-            # too many '.'
-            3.14.159
-                ^
-            FAIL: Expected end of text (at char 4), (line:1, col:5)
-
-            Success
-
-        Each test string must be on a single line. If you want to test a string that spans multiple
-        lines, create a test like this::
-
-            expr.runTest(r"this is a test\\n of strings that spans \\n 3 lines")
-
-        (Note that this is a raw string literal, you must include the leading 'r'.)
-        """
-        if isinstance(tests, basestring):
-            tests = list(map(str.strip, tests.rstrip().splitlines()))
-        if isinstance(comment, basestring):
-            comment = Literal(comment)
-        allResults = []
-        comments = []
-        success = True
-        for t in tests:
-            if comment is not None and comment.matches(t, False) or comments and not t:
-                comments.append(t)
-                continue
-            if not t:
-                continue
-            out = ['\n'.join(comments), t]
-            comments = []
-            try:
-                # convert newline marks to actual newlines, and strip leading BOM if present
-                t = t.replace(r'\n','\n').lstrip('\ufeff')
-                result = self.parseString(t, parseAll=parseAll)
-                out.append(result.dump(full=fullDump))
-                success = success and not failureTests
-                if postParse is not None:
-                    try:
-                        pp_value = postParse(t, result)
-                        if pp_value is not None:
-                            out.append(str(pp_value))
-                    except Exception as e:
-                        out.append("{0} failed: {1}: {2}".format(postParse.__name__, type(e).__name__, e))
-            except ParseBaseException as pe:
-                fatal = "(FATAL)" if isinstance(pe, ParseFatalException) else ""
-                if '\n' in t:
-                    out.append(line(pe.loc, t))
-                    out.append(' '*(col(pe.loc,t)-1) + '^' + fatal)
-                else:
-                    out.append(' '*pe.loc + '^' + fatal)
-                out.append("FAIL: " + str(pe))
-                success = success and failureTests
-                result = pe
-            except Exception as exc:
-                out.append("FAIL-EXCEPTION: " + str(exc))
-                success = success and failureTests
-                result = exc
-
-            if printResults:
-                if fullDump:
-                    out.append('')
-                print('\n'.join(out))
-
-            allResults.append((t, result))
-
-        return success, allResults
-
-
-class Token(ParserElement):
-    """Abstract :class:`ParserElement` subclass, for defining atomic
-    matching patterns.
-    """
-    def __init__( self ):
-        super(Token,self).__init__( savelist=False )
-
-
-class Empty(Token):
-    """An empty token, will always match.
-    """
-    def __init__( self ):
-        super(Empty,self).__init__()
-        self.name = "Empty"
-        self.mayReturnEmpty = True
-        self.mayIndexError = False
-
-
-class NoMatch(Token):
-    """A token that will never match.
-    """
-    def __init__( self ):
-        super(NoMatch,self).__init__()
-        self.name = "NoMatch"
-        self.mayReturnEmpty = True
-        self.mayIndexError = False
-        self.errmsg = "Unmatchable token"
-
-    def parseImpl( self, instring, loc, doActions=True ):
-        raise ParseException(instring, loc, self.errmsg, self)
-
-
-class Literal(Token):
-    """Token to exactly match a specified string.
-
-    Example::
-
-        Literal('blah').parseString('blah')  # -> ['blah']
-        Literal('blah').parseString('blahfooblah')  # -> ['blah']
-        Literal('blah').parseString('bla')  # -> Exception: Expected "blah"
-
-    For case-insensitive matching, use :class:`CaselessLiteral`.
-
-    For keyword matching (force word break before and after the matched string),
-    use :class:`Keyword` or :class:`CaselessKeyword`.
-    """
-    def __init__( self, matchString ):
-        super(Literal,self).__init__()
-        self.match = matchString
-        self.matchLen = len(matchString)
-        try:
-            self.firstMatchChar = matchString[0]
-        except IndexError:
-            warnings.warn("null string passed to Literal; use Empty() instead",
-                            SyntaxWarning, stacklevel=2)
-            self.__class__ = Empty
-        self.name = '"%s"' % _ustr(self.match)
-        self.errmsg = "Expected " + self.name
-        self.mayReturnEmpty = False
-        self.mayIndexError = False
-
-    # Performance tuning: this routine gets called a *lot*
-    # if this is a single character match string  and the first character matches,
-    # short-circuit as quickly as possible, and avoid calling startswith
-    #~ @profile
-    def parseImpl( self, instring, loc, doActions=True ):
-        if (instring[loc] == self.firstMatchChar and
-            (self.matchLen==1 or instring.startswith(self.match,loc)) ):
-            return loc+self.matchLen, self.match
-        raise ParseException(instring, loc, self.errmsg, self)
-_L = Literal
-ParserElement._literalStringClass = Literal
-
-class Keyword(Token):
-    """Token to exactly match a specified string as a keyword, that is,
-    it must be immediately followed by a non-keyword character.  Compare
-    with :class:`Literal`:
-
-     - ``Literal("if")`` will match the leading ``'if'`` in
-       ``'ifAndOnlyIf'``.
-     - ``Keyword("if")`` will not; it will only match the leading
-       ``'if'`` in ``'if x=1'``, or ``'if(y==2)'``
-
-    Accepts two optional constructor arguments in addition to the
-    keyword string:
-
-     - ``identChars`` is a string of characters that would be valid
-       identifier characters, defaulting to all alphanumerics + "_" and
-       "$"
-     - ``caseless`` allows case-insensitive matching, default is ``False``.
-
-    Example::
-
-        Keyword("start").parseString("start")  # -> ['start']
-        Keyword("start").parseString("starting")  # -> Exception
-
-    For case-insensitive matching, use :class:`CaselessKeyword`.
-    """
-    DEFAULT_KEYWORD_CHARS = alphanums+"_$"
-
-    def __init__( self, matchString, identChars=None, caseless=False ):
-        super(Keyword,self).__init__()
-        if identChars is None:
-            identChars = Keyword.DEFAULT_KEYWORD_CHARS
-        self.match = matchString
-        self.matchLen = len(matchString)
-        try:
-            self.firstMatchChar = matchString[0]
-        except IndexError:
-            warnings.warn("null string passed to Keyword; use Empty() instead",
-                            SyntaxWarning, stacklevel=2)
-        self.name = '"%s"' % self.match
-        self.errmsg = "Expected " + self.name
-        self.mayReturnEmpty = False
-        self.mayIndexError = False
-        self.caseless = caseless
-        if caseless:
-            self.caselessmatch = matchString.upper()
-            identChars = identChars.upper()
-        self.identChars = set(identChars)
-
-    def parseImpl( self, instring, loc, doActions=True ):
-        if self.caseless:
-            if ( (instring[ loc:loc+self.matchLen ].upper() == self.caselessmatch) and
-                 (loc >= len(instring)-self.matchLen or instring[loc+self.matchLen].upper() not in self.identChars) and
-                 (loc == 0 or instring[loc-1].upper() not in self.identChars) ):
-                return loc+self.matchLen, self.match
-        else:
-            if (instring[loc] == self.firstMatchChar and
-                (self.matchLen==1 or instring.startswith(self.match,loc)) and
-                (loc >= len(instring)-self.matchLen or instring[loc+self.matchLen] not in self.identChars) and
-                (loc == 0 or instring[loc-1] not in self.identChars) ):
-                return loc+self.matchLen, self.match
-        raise ParseException(instring, loc, self.errmsg, self)
-
-    def copy(self):
-        c = super(Keyword,self).copy()
-        c.identChars = Keyword.DEFAULT_KEYWORD_CHARS
-        return c
-
-    @staticmethod
-    def setDefaultKeywordChars( chars ):
-        """Overrides the default Keyword chars
-        """
-        Keyword.DEFAULT_KEYWORD_CHARS = chars
-
-class CaselessLiteral(Literal):
-    """Token to match a specified string, ignoring case of letters.
-    Note: the matched results will always be in the case of the given
-    match string, NOT the case of the input text.
-
-    Example::
-
-        OneOrMore(CaselessLiteral("CMD")).parseString("cmd CMD Cmd10") # -> ['CMD', 'CMD', 'CMD']
-
-    (Contrast with example for :class:`CaselessKeyword`.)
-    """
-    def __init__( self, matchString ):
-        super(CaselessLiteral,self).__init__( matchString.upper() )
-        # Preserve the defining literal.
-        self.returnString = matchString
-        self.name = "'%s'" % self.returnString
-        self.errmsg = "Expected " + self.name
-
-    def parseImpl( self, instring, loc, doActions=True ):
-        if instring[ loc:loc+self.matchLen ].upper() == self.match:
-            return loc+self.matchLen, self.returnString
-        raise ParseException(instring, loc, self.errmsg, self)
-
-class CaselessKeyword(Keyword):
-    """
-    Caseless version of :class:`Keyword`.
-
-    Example::
-
-        OneOrMore(CaselessKeyword("CMD")).parseString("cmd CMD Cmd10") # -> ['CMD', 'CMD']
-
-    (Contrast with example for :class:`CaselessLiteral`.)
-    """
-    def __init__( self, matchString, identChars=None ):
-        super(CaselessKeyword,self).__init__( matchString, identChars, caseless=True )
-
-class CloseMatch(Token):
-    """A variation on :class:`Literal` which matches "close" matches,
-    that is, strings with at most 'n' mismatching characters.
-    :class:`CloseMatch` takes parameters:
-
-     - ``match_string`` - string to be matched
-     - ``maxMismatches`` - (``default=1``) maximum number of
-       mismatches allowed to count as a match
-
-    The results from a successful parse will contain the matched text
-    from the input string and the following named results:
-
-     - ``mismatches`` - a list of the positions within the
-       match_string where mismatches were found
-     - ``original`` - the original match_string used to compare
-       against the input string
-
-    If ``mismatches`` is an empty list, then the match was an exact
-    match.
-
-    Example::
-
-        patt = CloseMatch("ATCATCGAATGGA")
-        patt.parseString("ATCATCGAAXGGA") # -> (['ATCATCGAAXGGA'], {'mismatches': [[9]], 'original': ['ATCATCGAATGGA']})
-        patt.parseString("ATCAXCGAAXGGA") # -> Exception: Expected 'ATCATCGAATGGA' (with up to 1 mismatches) (at char 0), (line:1, col:1)
-
-        # exact match
-        patt.parseString("ATCATCGAATGGA") # -> (['ATCATCGAATGGA'], {'mismatches': [[]], 'original': ['ATCATCGAATGGA']})
-
-        # close match allowing up to 2 mismatches
-        patt = CloseMatch("ATCATCGAATGGA", maxMismatches=2)
-        patt.parseString("ATCAXCGAAXGGA") # -> (['ATCAXCGAAXGGA'], {'mismatches': [[4, 9]], 'original': ['ATCATCGAATGGA']})
-    """
-    def __init__(self, match_string, maxMismatches=1):
-        super(CloseMatch,self).__init__()
-        self.name = match_string
-        self.match_string = match_string
-        self.maxMismatches = maxMismatches
-        self.errmsg = "Expected %r (with up to %d mismatches)" % (self.match_string, self.maxMismatches)
-        self.mayIndexError = False
-        self.mayReturnEmpty = False
-
-    def parseImpl( self, instring, loc, doActions=True ):
-        start = loc
-        instrlen = len(instring)
-        maxloc = start + len(self.match_string)
-
-        if maxloc <= instrlen:
-            match_string = self.match_string
-            match_stringloc = 0
-            mismatches = []
-            maxMismatches = self.maxMismatches
-
-            for match_stringloc,s_m in enumerate(zip(instring[loc:maxloc], self.match_string)):
-                src,mat = s_m
-                if src != mat:
-                    mismatches.append(match_stringloc)
-                    if len(mismatches) > maxMismatches:
-                        break
-            else:
-                loc = match_stringloc + 1
-                results = ParseResults([instring[start:loc]])
-                results['original'] = self.match_string
-                results['mismatches'] = mismatches
-                return loc, results
-
-        raise ParseException(instring, loc, self.errmsg, self)
-
-
-class Word(Token):
-    """Token for matching words composed of allowed character sets.
-    Defined with string containing all allowed initial characters, an
-    optional string containing allowed body characters (if omitted,
-    defaults to the initial character set), and an optional minimum,
-    maximum, and/or exact length.  The default value for ``min`` is
-    1 (a minimum value < 1 is not valid); the default values for
-    ``max`` and ``exact`` are 0, meaning no maximum or exact
-    length restriction. An optional ``excludeChars`` parameter can
-    list characters that might be found in the input ``bodyChars``
-    string; useful to define a word of all printables except for one or
-    two characters, for instance.
-
-    :class:`srange` is useful for defining custom character set strings
-    for defining ``Word`` expressions, using range notation from
-    regular expression character sets.
-
-    A common mistake is to use :class:`Word` to match a specific literal
-    string, as in ``Word("Address")``. Remember that :class:`Word`
-    uses the string argument to define *sets* of matchable characters.
-    This expression would match "Add", "AAA", "dAred", or any other word
-    made up of the characters 'A', 'd', 'r', 'e', and 's'. To match an
-    exact literal string, use :class:`Literal` or :class:`Keyword`.
-
-    pyparsing includes helper strings for building Words:
-
-     - :class:`alphas`
-     - :class:`nums`
-     - :class:`alphanums`
-     - :class:`hexnums`
-     - :class:`alphas8bit` (alphabetic characters in ASCII range 128-255
-       - accented, tilded, umlauted, etc.)
-     - :class:`punc8bit` (non-alphabetic characters in ASCII range
-       128-255 - currency, symbols, superscripts, diacriticals, etc.)
-     - :class:`printables` (any non-whitespace character)
-
-    Example::
-
-        # a word composed of digits
-        integer = Word(nums) # equivalent to Word("0123456789") or Word(srange("0-9"))
-
-        # a word with a leading capital, and zero or more lowercase
-        capital_word = Word(alphas.upper(), alphas.lower())
-
-        # hostnames are alphanumeric, with leading alpha, and '-'
-        hostname = Word(alphas, alphanums+'-')
-
-        # roman numeral (not a strict parser, accepts invalid mix of characters)
-        roman = Word("IVXLCDM")
-
-        # any string of non-whitespace characters, except for ','
-        csv_value = Word(printables, excludeChars=",")
-    """
-    def __init__( self, initChars, bodyChars=None, min=1, max=0, exact=0, asKeyword=False, excludeChars=None ):
-        super(Word,self).__init__()
-        if excludeChars:
-            initChars = ''.join(c for c in initChars if c not in excludeChars)
-            if bodyChars:
-                bodyChars = ''.join(c for c in bodyChars if c not in excludeChars)
-        self.initCharsOrig = initChars
-        self.initChars = set(initChars)
-        if bodyChars :
-            self.bodyCharsOrig = bodyChars
-            self.bodyChars = set(bodyChars)
-        else:
-            self.bodyCharsOrig = initChars
-            self.bodyChars = set(initChars)
-
-        self.maxSpecified = max > 0
-
-        if min < 1:
-            raise ValueError("cannot specify a minimum length < 1; use Optional(Word()) if zero-length word is permitted")
-
-        self.minLen = min
-
-        if max > 0:
-            self.maxLen = max
-        else:
-            self.maxLen = _MAX_INT
-
-        if exact > 0:
-            self.maxLen = exact
-            self.minLen = exact
-
-        self.name = _ustr(self)
-        self.errmsg = "Expected " + self.name
-        self.mayIndexError = False
-        self.asKeyword = asKeyword
-
-        if ' ' not in self.initCharsOrig+self.bodyCharsOrig and (min==1 and max==0 and exact==0):
-            if self.bodyCharsOrig == self.initCharsOrig:
-                self.reString = "[%s]+" % _escapeRegexRangeChars(self.initCharsOrig)
-            elif len(self.initCharsOrig) == 1:
-                self.reString = "%s[%s]*" % \
-                                      (re.escape(self.initCharsOrig),
-                                      _escapeRegexRangeChars(self.bodyCharsOrig),)
-            else:
-                self.reString = "[%s][%s]*" % \
-                                      (_escapeRegexRangeChars(self.initCharsOrig),
-                                      _escapeRegexRangeChars(self.bodyCharsOrig),)
-            if self.asKeyword:
-                self.reString = r"\b"+self.reString+r"\b"
-            try:
-                self.re = re.compile( self.reString )
-            except Exception:
-                self.re = None
-
-    def parseImpl( self, instring, loc, doActions=True ):
-        if self.re:
-            result = self.re.match(instring,loc)
-            if not result:
-                raise ParseException(instring, loc, self.errmsg, self)
-
-            loc = result.end()
-            return loc, result.group()
-
-        if not(instring[ loc ] in self.initChars):
-            raise ParseException(instring, loc, self.errmsg, self)
-
-        start = loc
-        loc += 1
-        instrlen = len(instring)
-        bodychars = self.bodyChars
-        maxloc = start + self.maxLen
-        maxloc = min( maxloc, instrlen )
-        while loc < maxloc and instring[loc] in bodychars:
-            loc += 1
-
-        throwException = False
-        if loc - start < self.minLen:
-            throwException = True
-        if self.maxSpecified and loc < instrlen and instring[loc] in bodychars:
-            throwException = True
-        if self.asKeyword:
-            if (start>0 and instring[start-1] in bodychars) or (loc<instrlen and instring[loc] in bodychars):
-                throwException = True
-
-        if throwException:
-            raise ParseException(instring, loc, self.errmsg, self)
-
-        return loc, instring[start:loc]
-
-    def __str__( self ):
-        try:
-            return super(Word,self).__str__()
-        except Exception:
-            pass
-
-
-        if self.strRepr is None:
-
-            def charsAsStr(s):
-                if len(s)>4:
-                    return s[:4]+"..."
-                else:
-                    return s
-
-            if ( self.initCharsOrig != self.bodyCharsOrig ):
-                self.strRepr = "W:(%s,%s)" % ( charsAsStr(self.initCharsOrig), charsAsStr(self.bodyCharsOrig) )
-            else:
-                self.strRepr = "W:(%s)" % charsAsStr(self.initCharsOrig)
-
-        return self.strRepr
-
-
-class Char(Word):
-    """A short-cut class for defining ``Word(characters, exact=1)``,
-    when defining a match of any single character in a string of
-    characters.
-    """
-    def __init__(self, charset):
-        super(Char, self).__init__(charset, exact=1)
-        self.reString = "[%s]" % _escapeRegexRangeChars(self.initCharsOrig)
-        self.re = re.compile( self.reString )
-
-
-class Regex(Token):
-    r"""Token for matching strings that match a given regular
-    expression. Defined with string specifying the regular expression in
-    a form recognized by the stdlib Python  `re module <https://docs.python.org/3/library/re.html>`_.
-    If the given regex contains named groups (defined using ``(?P<name>...)``),
-    these will be preserved as named parse results.
-
-    Example::
-
-        realnum = Regex(r"[+-]?\d+\.\d*")
-        date = Regex(r'(?P<year>\d{4})-(?P<month>\d\d?)-(?P<day>\d\d?)')
-        # ref: https://stackoverflow.com/questions/267399/how-do-you-match-only-valid-roman-numerals-with-a-regular-expression
-        roman = Regex(r"M{0,4}(CM|CD|D?{0,3})(XC|XL|L?X{0,3})(IX|IV|V?I{0,3})")
-    """
-    compiledREtype = type(re.compile("[A-Z]"))
-    def __init__( self, pattern, flags=0, asGroupList=False, asMatch=False):
-        """The parameters ``pattern`` and ``flags`` are passed
-        to the ``re.compile()`` function as-is. See the Python
-        `re module <https://docs.python.org/3/library/re.html>`_ module for an
-        explanation of the acceptable patterns and flags.
-        """
-        super(Regex,self).__init__()
-
-        if isinstance(pattern, basestring):
-            if not pattern:
-                warnings.warn("null string passed to Regex; use Empty() instead",
-                        SyntaxWarning, stacklevel=2)
-
-            self.pattern = pattern
-            self.flags = flags
-
-            try:
-                self.re = re.compile(self.pattern, self.flags)
-                self.reString = self.pattern
-            except sre_constants.error:
-                warnings.warn("invalid pattern (%s) passed to Regex" % pattern,
-                    SyntaxWarning, stacklevel=2)
-                raise
-
-        elif isinstance(pattern, Regex.compiledREtype):
-            self.re = pattern
-            self.pattern = \
-            self.reString = str(pattern)
-            self.flags = flags
-
-        else:
-            raise ValueError("Regex may only be constructed with a string or a compiled RE object")
-
-        self.name = _ustr(self)
-        self.errmsg = "Expected " + self.name
-        self.mayIndexError = False
-        self.mayReturnEmpty = True
-        self.asGroupList = asGroupList
-        self.asMatch = asMatch
-
-    def parseImpl( self, instring, loc, doActions=True ):
-        result = self.re.match(instring,loc)
-        if not result:
-            raise ParseException(instring, loc, self.errmsg, self)
-
-        loc = result.end()
-        if self.asMatch:
-            ret = result
-        elif self.asGroupList:
-            ret = result.groups()
-        else:
-            ret = ParseResults(result.group())
-            d = result.groupdict()
-            if d:
-                for k, v in d.items():
-                    ret[k] = v
-        return loc,ret
-
-    def __str__( self ):
-        try:
-            return super(Regex,self).__str__()
-        except Exception:
-            pass
-
-        if self.strRepr is None:
-            self.strRepr = "Re:(%s)" % repr(self.pattern)
-
-        return self.strRepr
-
-    def sub(self, repl):
-        """
-        Return Regex with an attached parse action to transform the parsed
-        result as if called using `re.sub(expr, repl, string) <https://docs.python.org/3/library/re.html#re.sub>`_.
-
-        Example::
-
-            make_html = Regex(r"(\w+):(.*?):").sub(r"<\1>\2</\1>")
-            print(make_html.transformString("h1:main title:"))
-            # prints "<h1>main title</h1>"
-        """
-        if self.asGroupList:
-            warnings.warn("cannot use sub() with Regex(asGroupList=True)",
-                           SyntaxWarning, stacklevel=2)
-            raise SyntaxError()
-
-        if self.asMatch and callable(repl):
-            warnings.warn("cannot use sub() with a callable with Regex(asMatch=True)",
-                           SyntaxWarning, stacklevel=2)
-            raise SyntaxError()
-
-        if self.asMatch:
-            def pa(tokens):
-                return tokens[0].expand(repl)
-        else:
-            def pa(tokens):
-                return self.re.sub(repl, tokens[0])
-        return self.addParseAction(pa)
-
-class QuotedString(Token):
-    r"""
-    Token for matching strings that are delimited by quoting characters.
-
-    Defined with the following parameters:
-
-        - quoteChar - string of one or more characters defining the
-          quote delimiting string
-        - escChar - character to escape quotes, typically backslash
-          (default= ``None`` )
-        - escQuote - special quote sequence to escape an embedded quote
-          string (such as SQL's ``""`` to escape an embedded ``"``)
-          (default= ``None`` )
-        - multiline - boolean indicating whether quotes can span
-          multiple lines (default= ``False`` )
-        - unquoteResults - boolean indicating whether the matched text
-          should be unquoted (default= ``True`` )
-        - endQuoteChar - string of one or more characters defining the
-          end of the quote delimited string (default= ``None``  => same as
-          quoteChar)
-        - convertWhitespaceEscapes - convert escaped whitespace
-          (``'\t'``, ``'\n'``, etc.) to actual whitespace
-          (default= ``True`` )
-
-    Example::
-
-        qs = QuotedString('"')
-        print(qs.searchString('lsjdf "This is the quote" sldjf'))
-        complex_qs = QuotedString('{{', endQuoteChar='}}')
-        print(complex_qs.searchString('lsjdf {{This is the "quote"}} sldjf'))
-        sql_qs = QuotedString('"', escQuote='""')
-        print(sql_qs.searchString('lsjdf "This is the quote with ""embedded"" quotes" sldjf'))
-
-    prints::
-
-        [['This is the quote']]
-        [['This is the "quote"']]
-        [['This is the quote with "embedded" quotes']]
-    """
-    def __init__( self, quoteChar, escChar=None, escQuote=None, multiline=False, unquoteResults=True, endQuoteChar=None, convertWhitespaceEscapes=True):
-        super(QuotedString,self).__init__()
-
-        # remove white space from quote chars - wont work anyway
-        quoteChar = quoteChar.strip()
-        if not quoteChar:
-            warnings.warn("quoteChar cannot be the empty string",SyntaxWarning,stacklevel=2)
-            raise SyntaxError()
-
-        if endQuoteChar is None:
-            endQuoteChar = quoteChar
-        else:
-            endQuoteChar = endQuoteChar.strip()
-            if not endQuoteChar:
-                warnings.warn("endQuoteChar cannot be the empty string",SyntaxWarning,stacklevel=2)
-                raise SyntaxError()
-
-        self.quoteChar = quoteChar
-        self.quoteCharLen = len(quoteChar)
-        self.firstQuoteChar = quoteChar[0]
-        self.endQuoteChar = endQuoteChar
-        self.endQuoteCharLen = len(endQuoteChar)
-        self.escChar = escChar
-        self.escQuote = escQuote
-        self.unquoteResults = unquoteResults
-        self.convertWhitespaceEscapes = convertWhitespaceEscapes
-
-        if multiline:
-            self.flags = re.MULTILINE | re.DOTALL
-            self.pattern = r'%s(?:[^%s%s]' % \
-                ( re.escape(self.quoteChar),
-                  _escapeRegexRangeChars(self.endQuoteChar[0]),
-                  (escChar is not None and _escapeRegexRangeChars(escChar) or '') )
-        else:
-            self.flags = 0
-            self.pattern = r'%s(?:[^%s\n\r%s]' % \
-                ( re.escape(self.quoteChar),
-                  _escapeRegexRangeChars(self.endQuoteChar[0]),
-                  (escChar is not None and _escapeRegexRangeChars(escChar) or '') )
-        if len(self.endQuoteChar) > 1:
-            self.pattern += (
-                '|(?:' + ')|(?:'.join("%s[^%s]" % (re.escape(self.endQuoteChar[:i]),
-                                               _escapeRegexRangeChars(self.endQuoteChar[i]))
-                                    for i in range(len(self.endQuoteChar)-1,0,-1)) + ')'
-                )
-        if escQuote:
-            self.pattern += (r'|(?:%s)' % re.escape(escQuote))
-        if escChar:
-            self.pattern += (r'|(?:%s.)' % re.escape(escChar))
-            self.escCharReplacePattern = re.escape(self.escChar)+"(.)"
-        self.pattern += (r')*%s' % re.escape(self.endQuoteChar))
-
-        try:
-            self.re = re.compile(self.pattern, self.flags)
-            self.reString = self.pattern
-        except sre_constants.error:
-            warnings.warn("invalid pattern (%s) passed to Regex" % self.pattern,
-                SyntaxWarning, stacklevel=2)
-            raise
-
-        self.name = _ustr(self)
-        self.errmsg = "Expected " + self.name
-        self.mayIndexError = False
-        self.mayReturnEmpty = True
-
-    def parseImpl( self, instring, loc, doActions=True ):
-        result = instring[loc] == self.firstQuoteChar and self.re.match(instring,loc) or None
-        if not result:
-            raise ParseException(instring, loc, self.errmsg, self)
-
-        loc = result.end()
-        ret = result.group()
-
-        if self.unquoteResults:
-
-            # strip off quotes
-            ret = ret[self.quoteCharLen:-self.endQuoteCharLen]
-
-            if isinstance(ret,basestring):
-                # replace escaped whitespace
-                if '\\' in ret and self.convertWhitespaceEscapes:
-                    ws_map = {
-                        r'\t' : '\t',
-                        r'\n' : '\n',
-                        r'\f' : '\f',
-                        r'\r' : '\r',
-                    }
-                    for wslit,wschar in ws_map.items():
-                        ret = ret.replace(wslit, wschar)
-
-                # replace escaped characters
-                if self.escChar:
-                    ret = re.sub(self.escCharReplacePattern, r"\g<1>", ret)
-
-                # replace escaped quotes
-                if self.escQuote:
-                    ret = ret.replace(self.escQuote, self.endQuoteChar)
-
-        return loc, ret
-
-    def __str__( self ):
-        try:
-            return super(QuotedString,self).__str__()
-        except Exception:
-            pass
-
-        if self.strRepr is None:
-            self.strRepr = "quoted string, starting with %s ending with %s" % (self.quoteChar, self.endQuoteChar)
-
-        return self.strRepr
-
-
-class CharsNotIn(Token):
-    """Token for matching words composed of characters *not* in a given
-    set (will include whitespace in matched characters if not listed in
-    the provided exclusion set - see example). Defined with string
-    containing all disallowed characters, and an optional minimum,
-    maximum, and/or exact length.  The default value for ``min`` is
-    1 (a minimum value < 1 is not valid); the default values for
-    ``max`` and ``exact`` are 0, meaning no maximum or exact
-    length restriction.
-
-    Example::
-
-        # define a comma-separated-value as anything that is not a ','
-        csv_value = CharsNotIn(',')
-        print(delimitedList(csv_value).parseString("dkls,lsdkjf,s12 34,@!#,213"))
-
-    prints::
-
-        ['dkls', 'lsdkjf', 's12 34', '@!#', '213']
-    """
-    def __init__( self, notChars, min=1, max=0, exact=0 ):
-        super(CharsNotIn,self).__init__()
-        self.skipWhitespace = False
-        self.notChars = notChars
-
-        if min < 1:
-            raise ValueError(
-                "cannot specify a minimum length < 1; use " +
-                "Optional(CharsNotIn()) if zero-length char group is permitted")
-
-        self.minLen = min
-
-        if max > 0:
-            self.maxLen = max
-        else:
-            self.maxLen = _MAX_INT
-
-        if exact > 0:
-            self.maxLen = exact
-            self.minLen = exact
-
-        self.name = _ustr(self)
-        self.errmsg = "Expected " + self.name
-        self.mayReturnEmpty = ( self.minLen == 0 )
-        self.mayIndexError = False
-
-    def parseImpl( self, instring, loc, doActions=True ):
-        if instring[loc] in self.notChars:
-            raise ParseException(instring, loc, self.errmsg, self)
-
-        start = loc
-        loc += 1
-        notchars = self.notChars
-        maxlen = min( start+self.maxLen, len(instring) )
-        while loc < maxlen and \
-              (instring[loc] not in notchars):
-            loc += 1
-
-        if loc - start < self.minLen:
-            raise ParseException(instring, loc, self.errmsg, self)
-
-        return loc, instring[start:loc]
-
-    def __str__( self ):
-        try:
-            return super(CharsNotIn, self).__str__()
-        except Exception:
-            pass
-
-        if self.strRepr is None:
-            if len(self.notChars) > 4:
-                self.strRepr = "!W:(%s...)" % self.notChars[:4]
-            else:
-                self.strRepr = "!W:(%s)" % self.notChars
-
-        return self.strRepr
-
-class White(Token):
-    """Special matching class for matching whitespace.  Normally,
-    whitespace is ignored by pyparsing grammars.  This class is included
-    when some whitespace structures are significant.  Define with
-    a string containing the whitespace characters to be matched; default
-    is ``" \\t\\r\\n"``.  Also takes optional ``min``,
-    ``max``, and ``exact`` arguments, as defined for the
-    :class:`Word` class.
-    """
-    whiteStrs = {
-        ' ' : '<SP>',
-        '\t': '<TAB>',
-        '\n': '<LF>',
-        '\r': '<CR>',
-        '\f': '<FF>',
-        'u\00A0': '<NBSP>',
-        'u\1680': '<OGHAM_SPACE_MARK>',
-        'u\180E': '<MONGOLIAN_VOWEL_SEPARATOR>',
-        'u\2000': '<EN_QUAD>',
-        'u\2001': '<EM_QUAD>',
-        'u\2002': '<EN_SPACE>',
-        'u\2003': '<EM_SPACE>',
-        'u\2004': '<THREE-PER-EM_SPACE>',
-        'u\2005': '<FOUR-PER-EM_SPACE>',
-        'u\2006': '<SIX-PER-EM_SPACE>',
-        'u\2007': '<FIGURE_SPACE>',
-        'u\2008': '<PUNCTUATION_SPACE>',
-        'u\2009': '<THIN_SPACE>',
-        'u\200A': '<HAIR_SPACE>',
-        'u\200B': '<ZERO_WIDTH_SPACE>',
-        'u\202F': '<NNBSP>',
-        'u\205F': '<MMSP>',
-        'u\3000': '<IDEOGRAPHIC_SPACE>',
-        }
-    def __init__(self, ws=" \t\r\n", min=1, max=0, exact=0):
-        super(White,self).__init__()
-        self.matchWhite = ws
-        self.setWhitespaceChars( "".join(c for c in self.whiteChars if c not in self.matchWhite) )
-        #~ self.leaveWhitespace()
-        self.name = ("".join(White.whiteStrs[c] for c in self.matchWhite))
-        self.mayReturnEmpty = True
-        self.errmsg = "Expected " + self.name
-
-        self.minLen = min
-
-        if max > 0:
-            self.maxLen = max
-        else:
-            self.maxLen = _MAX_INT
-
-        if exact > 0:
-            self.maxLen = exact
-            self.minLen = exact
-
-    def parseImpl( self, instring, loc, doActions=True ):
-        if not(instring[ loc ] in self.matchWhite):
-            raise ParseException(instring, loc, self.errmsg, self)
-        start = loc
-        loc += 1
-        maxloc = start + self.maxLen
-        maxloc = min( maxloc, len(instring) )
-        while loc < maxloc and instring[loc] in self.matchWhite:
-            loc += 1
-
-        if loc - start < self.minLen:
-            raise ParseException(instring, loc, self.errmsg, self)
-
-        return loc, instring[start:loc]
-
-
-class _PositionToken(Token):
-    def __init__( self ):
-        super(_PositionToken,self).__init__()
-        self.name=self.__class__.__name__
-        self.mayReturnEmpty = True
-        self.mayIndexError = False
-
-class GoToColumn(_PositionToken):
-    """Token to advance to a specific column of input text; useful for
-    tabular report scraping.
-    """
-    def __init__( self, colno ):
-        super(GoToColumn,self).__init__()
-        self.col = colno
-
-    def preParse( self, instring, loc ):
-        if col(loc,instring) != self.col:
-            instrlen = len(instring)
-            if self.ignoreExprs:
-                loc = self._skipIgnorables( instring, loc )
-            while loc < instrlen and instring[loc].isspace() and col( loc, instring ) != self.col :
-                loc += 1
-        return loc
-
-    def parseImpl( self, instring, loc, doActions=True ):
-        thiscol = col( loc, instring )
-        if thiscol > self.col:
-            raise ParseException( instring, loc, "Text not in expected column", self )
-        newloc = loc + self.col - thiscol
-        ret = instring[ loc: newloc ]
-        return newloc, ret
-
-
-class LineStart(_PositionToken):
-    """Matches if current position is at the beginning of a line within
-    the parse string
-
-    Example::
-
-        test = '''\
-        AAA this line
-        AAA and this line
-          AAA but not this one
-        B AAA and definitely not this one
-        '''
-
-        for t in (LineStart() + 'AAA' + restOfLine).searchString(test):
-            print(t)
-
-    prints::
-
-        ['AAA', ' this line']
-        ['AAA', ' and this line']
-
-    """
-    def __init__( self ):
-        super(LineStart,self).__init__()
-        self.errmsg = "Expected start of line"
-
-    def parseImpl( self, instring, loc, doActions=True ):
-        if col(loc, instring) == 1:
-            return loc, []
-        raise ParseException(instring, loc, self.errmsg, self)
-
-class LineEnd(_PositionToken):
-    """Matches if current position is at the end of a line within the
-    parse string
-    """
-    def __init__( self ):
-        super(LineEnd,self).__init__()
-        self.setWhitespaceChars( ParserElement.DEFAULT_WHITE_CHARS.replace("\n","") )
-        self.errmsg = "Expected end of line"
-
-    def parseImpl( self, instring, loc, doActions=True ):
-        if loc<len(instring):
-            if instring[loc] == "\n":
-                return loc+1, "\n"
-            else:
-                raise ParseException(instring, loc, self.errmsg, self)
-        elif loc == len(instring):
-            return loc+1, []
-        else:
-            raise ParseException(instring, loc, self.errmsg, self)
-
-class StringStart(_PositionToken):
-    """Matches if current position is at the beginning of the parse
-    string
-    """
-    def __init__( self ):
-        super(StringStart,self).__init__()
-        self.errmsg = "Expected start of text"
-
-    def parseImpl( self, instring, loc, doActions=True ):
-        if loc != 0:
-            # see if entire string up to here is just whitespace and ignoreables
-            if loc != self.preParse( instring, 0 ):
-                raise ParseException(instring, loc, self.errmsg, self)
-        return loc, []
-
-class StringEnd(_PositionToken):
-    """Matches if current position is at the end of the parse string
-    """
-    def __init__( self ):
-        super(StringEnd,self).__init__()
-        self.errmsg = "Expected end of text"
-
-    def parseImpl( self, instring, loc, doActions=True ):
-        if loc < len(instring):
-            raise ParseException(instring, loc, self.errmsg, self)
-        elif loc == len(instring):
-            return loc+1, []
-        elif loc > len(instring):
-            return loc, []
-        else:
-            raise ParseException(instring, loc, self.errmsg, self)
-
-class WordStart(_PositionToken):
-    """Matches if the current position is at the beginning of a Word,
-    and is not preceded by any character in a given set of
-    ``wordChars`` (default= ``printables``). To emulate the
-    ``\b`` behavior of regular expressions, use
-    ``WordStart(alphanums)``. ``WordStart`` will also match at
-    the beginning of the string being parsed, or at the beginning of
-    a line.
-    """
-    def __init__(self, wordChars = printables):
-        super(WordStart,self).__init__()
-        self.wordChars = set(wordChars)
-        self.errmsg = "Not at the start of a word"
-
-    def parseImpl(self, instring, loc, doActions=True ):
-        if loc != 0:
-            if (instring[loc-1] in self.wordChars or
-                instring[loc] not in self.wordChars):
-                raise ParseException(instring, loc, self.errmsg, self)
-        return loc, []
-
-class WordEnd(_PositionToken):
-    """Matches if the current position is at the end of a Word, and is
-    not followed by any character in a given set of ``wordChars``
-    (default= ``printables``). To emulate the ``\b`` behavior of
-    regular expressions, use ``WordEnd(alphanums)``. ``WordEnd``
-    will also match at the end of the string being parsed, or at the end
-    of a line.
-    """
-    def __init__(self, wordChars = printables):
-        super(WordEnd,self).__init__()
-        self.wordChars = set(wordChars)
-        self.skipWhitespace = False
-        self.errmsg = "Not at the end of a word"
-
-    def parseImpl(self, instring, loc, doActions=True ):
-        instrlen = len(instring)
-        if instrlen>0 and loc<instrlen:
-            if (instring[loc] in self.wordChars or
-                instring[loc-1] not in self.wordChars):
-                raise ParseException(instring, loc, self.errmsg, self)
-        return loc, []
-
-
-class ParseExpression(ParserElement):
-    """Abstract subclass of ParserElement, for combining and
-    post-processing parsed tokens.
-    """
-    def __init__( self, exprs, savelist = False ):
-        super(ParseExpression,self).__init__(savelist)
-        if isinstance( exprs, _generatorType ):
-            exprs = list(exprs)
-
-        if isinstance( exprs, basestring ):
-            self.exprs = [ ParserElement._literalStringClass( exprs ) ]
-        elif isinstance( exprs, Iterable ):
-            exprs = list(exprs)
-            # if sequence of strings provided, wrap with Literal
-            if all(isinstance(expr, basestring) for expr in exprs):
-                exprs = map(ParserElement._literalStringClass, exprs)
-            self.exprs = list(exprs)
-        else:
-            try:
-                self.exprs = list( exprs )
-            except TypeError:
-                self.exprs = [ exprs ]
-        self.callPreparse = False
-
-    def __getitem__( self, i ):
-        return self.exprs[i]
-
-    def append( self, other ):
-        self.exprs.append( other )
-        self.strRepr = None
-        return self
-
-    def leaveWhitespace( self ):
-        """Extends ``leaveWhitespace`` defined in base class, and also invokes ``leaveWhitespace`` on
-           all contained expressions."""
-        self.skipWhitespace = False
-        self.exprs = [ e.copy() for e in self.exprs ]
-        for e in self.exprs:
-            e.leaveWhitespace()
-        return self
-
-    def ignore( self, other ):
-        if isinstance( other, Suppress ):
-            if other not in self.ignoreExprs:
-                super( ParseExpression, self).ignore( other )
-                for e in self.exprs:
-                    e.ignore( self.ignoreExprs[-1] )
-        else:
-            super( ParseExpression, self).ignore( other )
-            for e in self.exprs:
-                e.ignore( self.ignoreExprs[-1] )
-        return self
-
-    def __str__( self ):
-        try:
-            return super(ParseExpression,self).__str__()
-        except Exception:
-            pass
-
-        if self.strRepr is None:
-            self.strRepr = "%s:(%s)" % ( self.__class__.__name__, _ustr(self.exprs) )
-        return self.strRepr
-
-    def streamline( self ):
-        super(ParseExpression,self).streamline()
-
-        for e in self.exprs:
-            e.streamline()
-
-        # collapse nested And's of the form And( And( And( a,b), c), d) to And( a,b,c,d )
-        # but only if there are no parse actions or resultsNames on the nested And's
-        # (likewise for Or's and MatchFirst's)
-        if ( len(self.exprs) == 2 ):
-            other = self.exprs[0]
-            if ( isinstance( other, self.__class__ ) and
-                  not(other.parseAction) and
-                  other.resultsName is None and
-                  not other.debug ):
-                self.exprs = other.exprs[:] + [ self.exprs[1] ]
-                self.strRepr = None
-                self.mayReturnEmpty |= other.mayReturnEmpty
-                self.mayIndexError  |= other.mayIndexError
-
-            other = self.exprs[-1]
-            if ( isinstance( other, self.__class__ ) and
-                  not(other.parseAction) and
-                  other.resultsName is None and
-                  not other.debug ):
-                self.exprs = self.exprs[:-1] + other.exprs[:]
-                self.strRepr = None
-                self.mayReturnEmpty |= other.mayReturnEmpty
-                self.mayIndexError  |= other.mayIndexError
-
-        self.errmsg = "Expected " + _ustr(self)
-
-        return self
-
-    def setResultsName( self, name, listAllMatches=False ):
-        ret = super(ParseExpression,self).setResultsName(name,listAllMatches)
-        return ret
-
-    def validate( self, validateTrace=[] ):
-        tmp = validateTrace[:]+[self]
-        for e in self.exprs:
-            e.validate(tmp)
-        self.checkRecursion( [] )
-
-    def copy(self):
-        ret = super(ParseExpression,self).copy()
-        ret.exprs = [e.copy() for e in self.exprs]
-        return ret
-
-class And(ParseExpression):
-    """
-    Requires all given :class:`ParseExpression` s to be found in the given order.
-    Expressions may be separated by whitespace.
-    May be constructed using the ``'+'`` operator.
-    May also be constructed using the ``'-'`` operator, which will
-    suppress backtracking.
-
-    Example::
-
-        integer = Word(nums)
-        name_expr = OneOrMore(Word(alphas))
-
-        expr = And([integer("id"),name_expr("name"),integer("age")])
-        # more easily written as:
-        expr = integer("id") + name_expr("name") + integer("age")
-    """
-
-    class _ErrorStop(Empty):
-        def __init__(self, *args, **kwargs):
-            super(And._ErrorStop,self).__init__(*args, **kwargs)
-            self.name = '-'
-            self.leaveWhitespace()
-
-    def __init__( self, exprs, savelist = True ):
-        super(And,self).__init__(exprs, savelist)
-        self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs)
-        self.setWhitespaceChars( self.exprs[0].whiteChars )
-        self.skipWhitespace = self.exprs[0].skipWhitespace
-        self.callPreparse = True
-
-    def streamline(self):
-        super(And, self).streamline()
-        self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs)
-        return self
-
-    def parseImpl( self, instring, loc, doActions=True ):
-        # pass False as last arg to _parse for first element, since we already
-        # pre-parsed the string as part of our And pre-parsing
-        loc, resultlist = self.exprs[0]._parse( instring, loc, doActions, callPreParse=False )
-        errorStop = False
-        for e in self.exprs[1:]:
-            if isinstance(e, And._ErrorStop):
-                errorStop = True
-                continue
-            if errorStop:
-                try:
-                    loc, exprtokens = e._parse( instring, loc, doActions )
-                except ParseSyntaxException:
-                    raise
-                except ParseBaseException as pe:
-                    pe.__traceback__ = None
-                    raise ParseSyntaxException._from_exception(pe)
-                except IndexError:
-                    raise ParseSyntaxException(instring, len(instring), self.errmsg, self)
-            else:
-                loc, exprtokens = e._parse( instring, loc, doActions )
-            if exprtokens or exprtokens.haskeys():
-                resultlist += exprtokens
-        return loc, resultlist
-
-    def __iadd__(self, other ):
-        if isinstance( other, basestring ):
-            other = ParserElement._literalStringClass( other )
-        return self.append( other ) #And( [ self, other ] )
-
-    def checkRecursion( self, parseElementList ):
-        subRecCheckList = parseElementList[:] + [ self ]
-        for e in self.exprs:
-            e.checkRecursion( subRecCheckList )
-            if not e.mayReturnEmpty:
-                break
-
-    def __str__( self ):
-        if hasattr(self,"name"):
-            return self.name
-
-        if self.strRepr is None:
-            self.strRepr = "{" + " ".join(_ustr(e) for e in self.exprs) + "}"
-
-        return self.strRepr
-
-
-class Or(ParseExpression):
-    """Requires that at least one :class:`ParseExpression` is found. If
-    two expressions match, the expression that matches the longest
-    string will be used. May be constructed using the ``'^'``
-    operator.
-
-    Example::
-
-        # construct Or using '^' operator
-
-        number = Word(nums) ^ Combine(Word(nums) + '.' + Word(nums))
-        print(number.searchString("123 3.1416 789"))
-
-    prints::
-
-        [['123'], ['3.1416'], ['789']]
-    """
-    def __init__( self, exprs, savelist = False ):
-        super(Or,self).__init__(exprs, savelist)
-        if self.exprs:
-            self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs)
-        else:
-            self.mayReturnEmpty = True
-
-    def streamline(self):
-        super(Or, self).streamline()
-        self.saveAsList = any(e.saveAsList for e in self.exprs)
-        return self
-
-    def parseImpl( self, instring, loc, doActions=True ):
-        maxExcLoc = -1
-        maxException = None
-        matches = []
-        for e in self.exprs:
-            try:
-                loc2 = e.tryParse( instring, loc )
-            except ParseException as err:
-                err.__traceback__ = None
-                if err.loc > maxExcLoc:
-                    maxException = err
-                    maxExcLoc = err.loc
-            except IndexError:
-                if len(instring) > maxExcLoc:
-                    maxException = ParseException(instring,len(instring),e.errmsg,self)
-                    maxExcLoc = len(instring)
-            else:
-                # save match among all matches, to retry longest to shortest
-                matches.append((loc2, e))
-
-        if matches:
-            matches.sort(key=lambda x: -x[0])
-            for _,e in matches:
-                try:
-                    return e._parse( instring, loc, doActions )
-                except ParseException as err:
-                    err.__traceback__ = None
-                    if err.loc > maxExcLoc:
-                        maxException = err
-                        maxExcLoc = err.loc
-
-        if maxException is not None:
-            maxException.msg = self.errmsg
-            raise maxException
-        else:
-            raise ParseException(instring, loc, "no defined alternatives to match", self)
-
-
-    def __ixor__(self, other ):
-        if isinstance( other, basestring ):
-            other = ParserElement._literalStringClass( other )
-        return self.append( other ) #Or( [ self, other ] )
-
-    def __str__( self ):
-        if hasattr(self,"name"):
-            return self.name
-
-        if self.strRepr is None:
-            self.strRepr = "{" + " ^ ".join(_ustr(e) for e in self.exprs) + "}"
-
-        return self.strRepr
-
-    def checkRecursion( self, parseElementList ):
-        subRecCheckList = parseElementList[:] + [ self ]
-        for e in self.exprs:
-            e.checkRecursion( subRecCheckList )
-
-
-class MatchFirst(ParseExpression):
-    """Requires that at least one :class:`ParseExpression` is found. If
-    two expressions match, the first one listed is the one that will
-    match. May be constructed using the ``'|'`` operator.
-
-    Example::
-
-        # construct MatchFirst using '|' operator
-
-        # watch the order of expressions to match
-        number = Word(nums) | Combine(Word(nums) + '.' + Word(nums))
-        print(number.searchString("123 3.1416 789")) #  Fail! -> [['123'], ['3'], ['1416'], ['789']]
-
-        # put more selective expression first
-        number = Combine(Word(nums) + '.' + Word(nums)) | Word(nums)
-        print(number.searchString("123 3.1416 789")) #  Better -> [['123'], ['3.1416'], ['789']]
-    """
-    def __init__( self, exprs, savelist = False ):
-        super(MatchFirst,self).__init__(exprs, savelist)
-        if self.exprs:
-            self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs)
-            # self.saveAsList = any(e.saveAsList for e in self.exprs)
-        else:
-            self.mayReturnEmpty = True
-
-    def streamline(self):
-        super(MatchFirst, self).streamline()
-        self.saveAsList = any(e.saveAsList for e in self.exprs)
-        return self
-
-    def parseImpl( self, instring, loc, doActions=True ):
-        maxExcLoc = -1
-        maxException = None
-        for e in self.exprs:
-            try:
-                ret = e._parse( instring, loc, doActions )
-                return ret
-            except ParseException as err:
-                if err.loc > maxExcLoc:
-                    maxException = err
-                    maxExcLoc = err.loc
-            except IndexError:
-                if len(instring) > maxExcLoc:
-                    maxException = ParseException(instring,len(instring),e.errmsg,self)
-                    maxExcLoc = len(instring)
-
-        # only got here if no expression matched, raise exception for match that made it the furthest
-        else:
-            if maxException is not None:
-                maxException.msg = self.errmsg
-                raise maxException
-            else:
-                raise ParseException(instring, loc, "no defined alternatives to match", self)
-
-    def __ior__(self, other ):
-        if isinstance( other, basestring ):
-            other = ParserElement._literalStringClass( other )
-        return self.append( other ) #MatchFirst( [ self, other ] )
-
-    def __str__( self ):
-        if hasattr(self,"name"):
-            return self.name
-
-        if self.strRepr is None:
-            self.strRepr = "{" + " | ".join(_ustr(e) for e in self.exprs) + "}"
-
-        return self.strRepr
-
-    def checkRecursion( self, parseElementList ):
-        subRecCheckList = parseElementList[:] + [ self ]
-        for e in self.exprs:
-            e.checkRecursion( subRecCheckList )
-
-
-class Each(ParseExpression):
-    """Requires all given :class:`ParseExpression` s to be found, but in
-    any order. Expressions may be separated by whitespace.
-
-    May be constructed using the ``'&'`` operator.
-
-    Example::
-
-        color = oneOf("RED ORANGE YELLOW GREEN BLUE PURPLE BLACK WHITE BROWN")
-        shape_type = oneOf("SQUARE CIRCLE TRIANGLE STAR HEXAGON OCTAGON")
-        integer = Word(nums)
-        shape_attr = "shape:" + shape_type("shape")
-        posn_attr = "posn:" + Group(integer("x") + ',' + integer("y"))("posn")
-        color_attr = "color:" + color("color")
-        size_attr = "size:" + integer("size")
-
-        # use Each (using operator '&') to accept attributes in any order
-        # (shape and posn are required, color and size are optional)
-        shape_spec = shape_attr & posn_attr & Optional(color_attr) & Optional(size_attr)
-
-        shape_spec.runTests('''
-            shape: SQUARE color: BLACK posn: 100, 120
-            shape: CIRCLE size: 50 color: BLUE posn: 50,80
-            color:GREEN size:20 shape:TRIANGLE posn:20,40
-            '''
-            )
-
-    prints::
-
-        shape: SQUARE color: BLACK posn: 100, 120
-        ['shape:', 'SQUARE', 'color:', 'BLACK', 'posn:', ['100', ',', '120']]
-        - color: BLACK
-        - posn: ['100', ',', '120']
-          - x: 100
-          - y: 120
-        - shape: SQUARE
-
-
-        shape: CIRCLE size: 50 color: BLUE posn: 50,80
-        ['shape:', 'CIRCLE', 'size:', '50', 'color:', 'BLUE', 'posn:', ['50', ',', '80']]
-        - color: BLUE
-        - posn: ['50', ',', '80']
-          - x: 50
-          - y: 80
-        - shape: CIRCLE
-        - size: 50
-
-
-        color: GREEN size: 20 shape: TRIANGLE posn: 20,40
-        ['color:', 'GREEN', 'size:', '20', 'shape:', 'TRIANGLE', 'posn:', ['20', ',', '40']]
-        - color: GREEN
-        - posn: ['20', ',', '40']
-          - x: 20
-          - y: 40
-        - shape: TRIANGLE
-        - size: 20
-    """
-    def __init__( self, exprs, savelist = True ):
-        super(Each,self).__init__(exprs, savelist)
-        self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs)
-        self.skipWhitespace = True
-        self.initExprGroups = True
-        self.saveAsList = True
-
-    def streamline(self):
-        super(Each, self).streamline()
-        self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs)
-        return self
-
-    def parseImpl( self, instring, loc, doActions=True ):
-        if self.initExprGroups:
-            self.opt1map = dict((id(e.expr),e) for e in self.exprs if isinstance(e,Optional))
-            opt1 = [ e.expr for e in self.exprs if isinstance(e,Optional) ]
-            opt2 = [ e for e in self.exprs if e.mayReturnEmpty and not isinstance(e,Optional)]
-            self.optionals = opt1 + opt2
-            self.multioptionals = [ e.expr for e in self.exprs if isinstance(e,ZeroOrMore) ]
-            self.multirequired = [ e.expr for e in self.exprs if isinstance(e,OneOrMore) ]
-            self.required = [ e for e in self.exprs if not isinstance(e,(Optional,ZeroOrMore,OneOrMore)) ]
-            self.required += self.multirequired
-            self.initExprGroups = False
-        tmpLoc = loc
-        tmpReqd = self.required[:]
-        tmpOpt  = self.optionals[:]
-        matchOrder = []
-
-        keepMatching = True
-        while keepMatching:
-            tmpExprs = tmpReqd + tmpOpt + self.multioptionals + self.multirequired
-            failed = []
-            for e in tmpExprs:
-                try:
-                    tmpLoc = e.tryParse( instring, tmpLoc )
-                except ParseException:
-                    failed.append(e)
-                else:
-                    matchOrder.append(self.opt1map.get(id(e),e))
-                    if e in tmpReqd:
-                        tmpReqd.remove(e)
-                    elif e in tmpOpt:
-                        tmpOpt.remove(e)
-            if len(failed) == len(tmpExprs):
-                keepMatching = False
-
-        if tmpReqd:
-            missing = ", ".join(_ustr(e) for e in tmpReqd)
-            raise ParseException(instring,loc,"Missing one or more required elements (%s)" % missing )
-
-        # add any unmatched Optionals, in case they have default values defined
-        matchOrder += [e for e in self.exprs if isinstance(e,Optional) and e.expr in tmpOpt]
-
-        resultlist = []
-        for e in matchOrder:
-            loc,results = e._parse(instring,loc,doActions)
-            resultlist.append(results)
-
-        finalResults = sum(resultlist, ParseResults([]))
-        return loc, finalResults
-
-    def __str__( self ):
-        if hasattr(self,"name"):
-            return self.name
-
-        if self.strRepr is None:
-            self.strRepr = "{" + " & ".join(_ustr(e) for e in self.exprs) + "}"
-
-        return self.strRepr
-
-    def checkRecursion( self, parseElementList ):
-        subRecCheckList = parseElementList[:] + [ self ]
-        for e in self.exprs:
-            e.checkRecursion( subRecCheckList )
-
-
-class ParseElementEnhance(ParserElement):
-    """Abstract subclass of :class:`ParserElement`, for combining and
-    post-processing parsed tokens.
-    """
-    def __init__( self, expr, savelist=False ):
-        super(ParseElementEnhance,self).__init__(savelist)
-        if isinstance( expr, basestring ):
-            if issubclass(ParserElement._literalStringClass, Token):
-                expr = ParserElement._literalStringClass(expr)
-            else:
-                expr = ParserElement._literalStringClass(Literal(expr))
-        self.expr = expr
-        self.strRepr = None
-        if expr is not None:
-            self.mayIndexError = expr.mayIndexError
-            self.mayReturnEmpty = expr.mayReturnEmpty
-            self.setWhitespaceChars( expr.whiteChars )
-            self.skipWhitespace = expr.skipWhitespace
-            self.saveAsList = expr.saveAsList
-            self.callPreparse = expr.callPreparse
-            self.ignoreExprs.extend(expr.ignoreExprs)
-
-    def parseImpl( self, instring, loc, doActions=True ):
-        if self.expr is not None:
-            return self.expr._parse( instring, loc, doActions, callPreParse=False )
-        else:
-            raise ParseException("",loc,self.errmsg,self)
-
-    def leaveWhitespace( self ):
-        self.skipWhitespace = False
-        self.expr = self.expr.copy()
-        if self.expr is not None:
-            self.expr.leaveWhitespace()
-        return self
-
-    def ignore( self, other ):
-        if isinstance( other, Suppress ):
-            if other not in self.ignoreExprs:
-                super( ParseElementEnhance, self).ignore( other )
-                if self.expr is not None:
-                    self.expr.ignore( self.ignoreExprs[-1] )
-        else:
-            super( ParseElementEnhance, self).ignore( other )
-            if self.expr is not None:
-                self.expr.ignore( self.ignoreExprs[-1] )
-        return self
-
-    def streamline( self ):
-        super(ParseElementEnhance,self).streamline()
-        if self.expr is not None:
-            self.expr.streamline()
-        return self
-
-    def checkRecursion( self, parseElementList ):
-        if self in parseElementList:
-            raise RecursiveGrammarException( parseElementList+[self] )
-        subRecCheckList = parseElementList[:] + [ self ]
-        if self.expr is not None:
-            self.expr.checkRecursion( subRecCheckList )
-
-    def validate( self, validateTrace=[] ):
-        tmp = validateTrace[:]+[self]
-        if self.expr is not None:
-            self.expr.validate(tmp)
-        self.checkRecursion( [] )
-
-    def __str__( self ):
-        try:
-            return super(ParseElementEnhance,self).__str__()
-        except Exception:
-            pass
-
-        if self.strRepr is None and self.expr is not None:
-            self.strRepr = "%s:(%s)" % ( self.__class__.__name__, _ustr(self.expr) )
-        return self.strRepr
-
-
-class FollowedBy(ParseElementEnhance):
-    """Lookahead matching of the given parse expression.
-    ``FollowedBy`` does *not* advance the parsing position within
-    the input string, it only verifies that the specified parse
-    expression matches at the current position.  ``FollowedBy``
-    always returns a null token list. If any results names are defined
-    in the lookahead expression, those *will* be returned for access by
-    name.
-
-    Example::
-
-        # use FollowedBy to match a label only if it is followed by a ':'
-        data_word = Word(alphas)
-        label = data_word + FollowedBy(':')
-        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
-
-        OneOrMore(attr_expr).parseString("shape: SQUARE color: BLACK posn: upper left").pprint()
-
-    prints::
-
-        [['shape', 'SQUARE'], ['color', 'BLACK'], ['posn', 'upper left']]
-    """
-    def __init__( self, expr ):
-        super(FollowedBy,self).__init__(expr)
-        self.mayReturnEmpty = True
-
-    def parseImpl( self, instring, loc, doActions=True ):
-        _, ret = self.expr._parse(instring, loc, doActions=doActions)
-        del ret[:]
-        return loc, ret
-
-
-class PrecededBy(ParseElementEnhance):
-    """Lookbehind matching of the given parse expression.
-    ``PrecededBy`` does not advance the parsing position within the
-    input string, it only verifies that the specified parse expression
-    matches prior to the current position.  ``PrecededBy`` always
-    returns a null token list, but if a results name is defined on the
-    given expression, it is returned.
-
-    Parameters:
-
-     - expr - expression that must match prior to the current parse
-       location
-     - retreat - (default= ``None``) - (int) maximum number of characters
-       to lookbehind prior to the current parse location
-
-    If the lookbehind expression is a string, Literal, Keyword, or
-    a Word or CharsNotIn with a specified exact or maximum length, then
-    the retreat parameter is not required. Otherwise, retreat must be
-    specified to give a maximum number of characters to look back from
-    the current parse position for a lookbehind match.
-
-    Example::
-
-        # VB-style variable names with type prefixes
-        int_var = PrecededBy("#") + pyparsing_common.identifier
-        str_var = PrecededBy("$") + pyparsing_common.identifier
-
-    """
-    def __init__(self, expr, retreat=None):
-        super(PrecededBy, self).__init__(expr)
-        self.expr = self.expr().leaveWhitespace()
-        self.mayReturnEmpty = True
-        self.mayIndexError = False
-        self.exact = False
-        if isinstance(expr, str):
-            retreat = len(expr)
-            self.exact = True
-        elif isinstance(expr, (Literal, Keyword)):
-            retreat = expr.matchLen
-            self.exact = True
-        elif isinstance(expr, (Word, CharsNotIn)) and expr.maxLen != _MAX_INT:
-            retreat = expr.maxLen
-            self.exact = True
-        elif isinstance(expr, _PositionToken):
-            retreat = 0
-            self.exact = True
-        self.retreat = retreat
-        self.errmsg = "not preceded by " + str(expr)
-        self.skipWhitespace = False
-
-    def parseImpl(self, instring, loc=0, doActions=True):
-        if self.exact:
-            if loc < self.retreat:
-                raise ParseException(instring, loc, self.errmsg)
-            start = loc - self.retreat
-            _, ret = self.expr._parse(instring, start)
-        else:
-            # retreat specified a maximum lookbehind window, iterate
-            test_expr = self.expr + StringEnd()
-            instring_slice = instring[:loc]
-            last_expr = ParseException(instring, loc, self.errmsg)
-            for offset in range(1, min(loc, self.retreat+1)):
-                try:
-                    _, ret = test_expr._parse(instring_slice, loc-offset)
-                except ParseBaseException as pbe:
-                    last_expr = pbe
-                else:
-                    break
-            else:
-                raise last_expr
-        # return empty list of tokens, but preserve any defined results names
-        del ret[:]
-        return loc, ret
-
-
-class NotAny(ParseElementEnhance):
-    """Lookahead to disallow matching with the given parse expression.
-    ``NotAny`` does *not* advance the parsing position within the
-    input string, it only verifies that the specified parse expression
-    does *not* match at the current position.  Also, ``NotAny`` does
-    *not* skip over leading whitespace. ``NotAny`` always returns
-    a null token list.  May be constructed using the '~' operator.
-
-    Example::
-
-        AND, OR, NOT = map(CaselessKeyword, "AND OR NOT".split())
-
-        # take care not to mistake keywords for identifiers
-        ident = ~(AND | OR | NOT) + Word(alphas)
-        boolean_term = Optional(NOT) + ident
-
-        # very crude boolean expression - to support parenthesis groups and
-        # operation hierarchy, use infixNotation
-        boolean_expr = boolean_term + ZeroOrMore((AND | OR) + boolean_term)
-
-        # integers that are followed by "." are actually floats
-        integer = Word(nums) + ~Char(".")
-    """
-    def __init__( self, expr ):
-        super(NotAny,self).__init__(expr)
-        #~ self.leaveWhitespace()
-        self.skipWhitespace = False  # do NOT use self.leaveWhitespace(), don't want to propagate to exprs
-        self.mayReturnEmpty = True
-        self.errmsg = "Found unwanted token, "+_ustr(self.expr)
-
-    def parseImpl( self, instring, loc, doActions=True ):
-        if self.expr.canParseNext(instring, loc):
-            raise ParseException(instring, loc, self.errmsg, self)
-        return loc, []
-
-    def __str__( self ):
-        if hasattr(self,"name"):
-            return self.name
-
-        if self.strRepr is None:
-            self.strRepr = "~{" + _ustr(self.expr) + "}"
-
-        return self.strRepr
-
-class _MultipleMatch(ParseElementEnhance):
-    def __init__( self, expr, stopOn=None):
-        super(_MultipleMatch, self).__init__(expr)
-        self.saveAsList = True
-        ender = stopOn
-        if isinstance(ender, basestring):
-            ender = ParserElement._literalStringClass(ender)
-        self.not_ender = ~ender if ender is not None else None
-
-    def parseImpl( self, instring, loc, doActions=True ):
-        self_expr_parse = self.expr._parse
-        self_skip_ignorables = self._skipIgnorables
-        check_ender = self.not_ender is not None
-        if check_ender:
-            try_not_ender = self.not_ender.tryParse
-
-        # must be at least one (but first see if we are the stopOn sentinel;
-        # if so, fail)
-        if check_ender:
-            try_not_ender(instring, loc)
-        loc, tokens = self_expr_parse( instring, loc, doActions, callPreParse=False )
-        try:
-            hasIgnoreExprs = (not not self.ignoreExprs)
-            while 1:
-                if check_ender:
-                    try_not_ender(instring, loc)
-                if hasIgnoreExprs:
-                    preloc = self_skip_ignorables( instring, loc )
-                else:
-                    preloc = loc
-                loc, tmptokens = self_expr_parse( instring, preloc, doActions )
-                if tmptokens or tmptokens.haskeys():
-                    tokens += tmptokens
-        except (ParseException,IndexError):
-            pass
-
-        return loc, tokens
-
-class OneOrMore(_MultipleMatch):
-    """Repetition of one or more of the given expression.
-
-    Parameters:
-     - expr - expression that must match one or more times
-     - stopOn - (default= ``None``) - expression for a terminating sentinel
-          (only required if the sentinel would ordinarily match the repetition
-          expression)
-
-    Example::
-
-        data_word = Word(alphas)
-        label = data_word + FollowedBy(':')
-        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).setParseAction(' '.join))
-
-        text = "shape: SQUARE posn: upper left color: BLACK"
-        OneOrMore(attr_expr).parseString(text).pprint()  # Fail! read 'color' as data instead of next label -> [['shape', 'SQUARE color']]
-
-        # use stopOn attribute for OneOrMore to avoid reading label string as part of the data
-        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
-        OneOrMore(attr_expr).parseString(text).pprint() # Better -> [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'BLACK']]
-
-        # could also be written as
-        (attr_expr * (1,)).parseString(text).pprint()
-    """
-
-    def __str__( self ):
-        if hasattr(self,"name"):
-            return self.name
-
-        if self.strRepr is None:
-            self.strRepr = "{" + _ustr(self.expr) + "}..."
-
-        return self.strRepr
-
-class ZeroOrMore(_MultipleMatch):
-    """Optional repetition of zero or more of the given expression.
-
-    Parameters:
-     - expr - expression that must match zero or more times
-     - stopOn - (default= ``None``) - expression for a terminating sentinel
-          (only required if the sentinel would ordinarily match the repetition
-          expression)
-
-    Example: similar to :class:`OneOrMore`
-    """
-    def __init__( self, expr, stopOn=None):
-        super(ZeroOrMore,self).__init__(expr, stopOn=stopOn)
-        self.mayReturnEmpty = True
-
-    def parseImpl( self, instring, loc, doActions=True ):
-        try:
-            return super(ZeroOrMore, self).parseImpl(instring, loc, doActions)
-        except (ParseException,IndexError):
-            return loc, []
-
-    def __str__( self ):
-        if hasattr(self,"name"):
-            return self.name
-
-        if self.strRepr is None:
-            self.strRepr = "[" + _ustr(self.expr) + "]..."
-
-        return self.strRepr
-
-class _NullToken(object):
-    def __bool__(self):
-        return False
-    __nonzero__ = __bool__
-    def __str__(self):
-        return ""
-
-_optionalNotMatched = _NullToken()
-class Optional(ParseElementEnhance):
-    """Optional matching of the given expression.
-
-    Parameters:
-     - expr - expression that must match zero or more times
-     - default (optional) - value to be returned if the optional expression is not found.
-
-    Example::
-
-        # US postal code can be a 5-digit zip, plus optional 4-digit qualifier
-        zip = Combine(Word(nums, exact=5) + Optional('-' + Word(nums, exact=4)))
-        zip.runTests('''
-            # traditional ZIP code
-            12345
-
-            # ZIP+4 form
-            12101-0001
-
-            # invalid ZIP
-            98765-
-            ''')
-
-    prints::
-
-        # traditional ZIP code
-        12345
-        ['12345']
-
-        # ZIP+4 form
-        12101-0001
-        ['12101-0001']
-
-        # invalid ZIP
-        98765-
-             ^
-        FAIL: Expected end of text (at char 5), (line:1, col:6)
-    """
-    def __init__( self, expr, default=_optionalNotMatched ):
-        super(Optional,self).__init__( expr, savelist=False )
-        self.saveAsList = self.expr.saveAsList
-        self.defaultValue = default
-        self.mayReturnEmpty = True
-
-    def parseImpl( self, instring, loc, doActions=True ):
-        try:
-            loc, tokens = self.expr._parse( instring, loc, doActions, callPreParse=False )
-        except (ParseException,IndexError):
-            if self.defaultValue is not _optionalNotMatched:
-                if self.expr.resultsName:
-                    tokens = ParseResults([ self.defaultValue ])
-                    tokens[self.expr.resultsName] = self.defaultValue
-                else:
-                    tokens = [ self.defaultValue ]
-            else:
-                tokens = []
-        return loc, tokens
-
-    def __str__( self ):
-        if hasattr(self,"name"):
-            return self.name
-
-        if self.strRepr is None:
-            self.strRepr = "[" + _ustr(self.expr) + "]"
-
-        return self.strRepr
-
-class SkipTo(ParseElementEnhance):
-    """Token for skipping over all undefined text until the matched
-    expression is found.
-
-    Parameters:
-     - expr - target expression marking the end of the data to be skipped
-     - include - (default= ``False``) if True, the target expression is also parsed
-          (the skipped text and target expression are returned as a 2-element list).
-     - ignore - (default= ``None``) used to define grammars (typically quoted strings and
-          comments) that might contain false matches to the target expression
-     - failOn - (default= ``None``) define expressions that are not allowed to be
-          included in the skipped test; if found before the target expression is found,
-          the SkipTo is not a match
-
-    Example::
-
-        report = '''
-            Outstanding Issues Report - 1 Jan 2000
-
-               # | Severity | Description                               |  Days Open
-            -----+----------+-------------------------------------------+-----------
-             101 | Critical | Intermittent system crash                 |          6
-              94 | Cosmetic | Spelling error on Login ('log|n')         |         14
-              79 | Minor    | System slow when running too many reports |         47
-            '''
-        integer = Word(nums)
-        SEP = Suppress('|')
-        # use SkipTo to simply match everything up until the next SEP
-        # - ignore quoted strings, so that a '|' character inside a quoted string does not match
-        # - parse action will call token.strip() for each matched token, i.e., the description body
-        string_data = SkipTo(SEP, ignore=quotedString)
-        string_data.setParseAction(tokenMap(str.strip))
-        ticket_expr = (integer("issue_num") + SEP
-                      + string_data("sev") + SEP
-                      + string_data("desc") + SEP
-                      + integer("days_open"))
-
-        for tkt in ticket_expr.searchString(report):
-            print tkt.dump()
-
-    prints::
-
-        ['101', 'Critical', 'Intermittent system crash', '6']
-        - days_open: 6
-        - desc: Intermittent system crash
-        - issue_num: 101
-        - sev: Critical
-        ['94', 'Cosmetic', "Spelling error on Login ('log|n')", '14']
-        - days_open: 14
-        - desc: Spelling error on Login ('log|n')
-        - issue_num: 94
-        - sev: Cosmetic
-        ['79', 'Minor', 'System slow when running too many reports', '47']
-        - days_open: 47
-        - desc: System slow when running too many reports
-        - issue_num: 79
-        - sev: Minor
-    """
-    def __init__( self, other, include=False, ignore=None, failOn=None ):
-        super( SkipTo, self ).__init__( other )
-        self.ignoreExpr = ignore
-        self.mayReturnEmpty = True
-        self.mayIndexError = False
-        self.includeMatch = include
-        self.saveAsList = False
-        if isinstance(failOn, basestring):
-            self.failOn = ParserElement._literalStringClass(failOn)
-        else:
-            self.failOn = failOn
-        self.errmsg = "No match found for "+_ustr(self.expr)
-
-    def parseImpl( self, instring, loc, doActions=True ):
-        startloc = loc
-        instrlen = len(instring)
-        expr = self.expr
-        expr_parse = self.expr._parse
-        self_failOn_canParseNext = self.failOn.canParseNext if self.failOn is not None else None
-        self_ignoreExpr_tryParse = self.ignoreExpr.tryParse if self.ignoreExpr is not None else None
-
-        tmploc = loc
-        while tmploc <= instrlen:
-            if self_failOn_canParseNext is not None:
-                # break if failOn expression matches
-                if self_failOn_canParseNext(instring, tmploc):
-                    break
-
-            if self_ignoreExpr_tryParse is not None:
-                # advance past ignore expressions
-                while 1:
-                    try:
-                        tmploc = self_ignoreExpr_tryParse(instring, tmploc)
-                    except ParseBaseException:
-                        break
-
-            try:
-                expr_parse(instring, tmploc, doActions=False, callPreParse=False)
-            except (ParseException, IndexError):
-                # no match, advance loc in string
-                tmploc += 1
-            else:
-                # matched skipto expr, done
-                break
-
-        else:
-            # ran off the end of the input string without matching skipto expr, fail
-            raise ParseException(instring, loc, self.errmsg, self)
-
-        # build up return values
-        loc = tmploc
-        skiptext = instring[startloc:loc]
-        skipresult = ParseResults(skiptext)
-
-        if self.includeMatch:
-            loc, mat = expr_parse(instring,loc,doActions,callPreParse=False)
-            skipresult += mat
-
-        return loc, skipresult
-
-class Forward(ParseElementEnhance):
-    """Forward declaration of an expression to be defined later -
-    used for recursive grammars, such as algebraic infix notation.
-    When the expression is known, it is assigned to the ``Forward``
-    variable using the '<<' operator.
-
-    Note: take care when assigning to ``Forward`` not to overlook
-    precedence of operators.
-
-    Specifically, '|' has a lower precedence than '<<', so that::
-
-        fwdExpr << a | b | c
-
-    will actually be evaluated as::
-
-        (fwdExpr << a) | b | c
-
-    thereby leaving b and c out as parseable alternatives.  It is recommended that you
-    explicitly group the values inserted into the ``Forward``::
-
-        fwdExpr << (a | b | c)
-
-    Converting to use the '<<=' operator instead will avoid this problem.
-
-    See :class:`ParseResults.pprint` for an example of a recursive
-    parser created using ``Forward``.
-    """
-    def __init__( self, other=None ):
-        super(Forward,self).__init__( other, savelist=False )
-
-    def __lshift__( self, other ):
-        if isinstance( other, basestring ):
-            other = ParserElement._literalStringClass(other)
-        self.expr = other
-        self.strRepr = None
-        self.mayIndexError = self.expr.mayIndexError
-        self.mayReturnEmpty = self.expr.mayReturnEmpty
-        self.setWhitespaceChars( self.expr.whiteChars )
-        self.skipWhitespace = self.expr.skipWhitespace
-        self.saveAsList = self.expr.saveAsList
-        self.ignoreExprs.extend(self.expr.ignoreExprs)
-        return self
-
-    def __ilshift__(self, other):
-        return self << other
-
-    def leaveWhitespace( self ):
-        self.skipWhitespace = False
-        return self
-
-    def streamline( self ):
-        if not self.streamlined:
-            self.streamlined = True
-            if self.expr is not None:
-                self.expr.streamline()
-        return self
-
-    def validate( self, validateTrace=[] ):
-        if self not in validateTrace:
-            tmp = validateTrace[:]+[self]
-            if self.expr is not None:
-                self.expr.validate(tmp)
-        self.checkRecursion([])
-
-    def __str__( self ):
-        if hasattr(self,"name"):
-            return self.name
-        return self.__class__.__name__ + ": ..."
-
-        # stubbed out for now - creates awful memory and perf issues
-        self._revertClass = self.__class__
-        self.__class__ = _ForwardNoRecurse
-        try:
-            if self.expr is not None:
-                retString = _ustr(self.expr)
-            else:
-                retString = "None"
-        finally:
-            self.__class__ = self._revertClass
-        return self.__class__.__name__ + ": " + retString
-
-    def copy(self):
-        if self.expr is not None:
-            return super(Forward,self).copy()
-        else:
-            ret = Forward()
-            ret <<= self
-            return ret
-
-class _ForwardNoRecurse(Forward):
-    def __str__( self ):
-        return "..."
-
-class TokenConverter(ParseElementEnhance):
-    """
-    Abstract subclass of :class:`ParseExpression`, for converting parsed results.
-    """
-    def __init__( self, expr, savelist=False ):
-        super(TokenConverter,self).__init__( expr )#, savelist )
-        self.saveAsList = False
-
-class Combine(TokenConverter):
-    """Converter to concatenate all matching tokens to a single string.
-    By default, the matching patterns must also be contiguous in the
-    input string; this can be disabled by specifying
-    ``'adjacent=False'`` in the constructor.
-
-    Example::
-
-        real = Word(nums) + '.' + Word(nums)
-        print(real.parseString('3.1416')) # -> ['3', '.', '1416']
-        # will also erroneously match the following
-        print(real.parseString('3. 1416')) # -> ['3', '.', '1416']
-
-        real = Combine(Word(nums) + '.' + Word(nums))
-        print(real.parseString('3.1416')) # -> ['3.1416']
-        # no match when there are internal spaces
-        print(real.parseString('3. 1416')) # -> Exception: Expected W:(0123...)
-    """
-    def __init__( self, expr, joinString="", adjacent=True ):
-        super(Combine,self).__init__( expr )
-        # suppress whitespace-stripping in contained parse expressions, but re-enable it on the Combine itself
-        if adjacent:
-            self.leaveWhitespace()
-        self.adjacent = adjacent
-        self.skipWhitespace = True
-        self.joinString = joinString
-        self.callPreparse = True
-
-    def ignore( self, other ):
-        if self.adjacent:
-            ParserElement.ignore(self, other)
-        else:
-            super( Combine, self).ignore( other )
-        return self
-
-    def postParse( self, instring, loc, tokenlist ):
-        retToks = tokenlist.copy()
-        del retToks[:]
-        retToks += ParseResults([ "".join(tokenlist._asStringList(self.joinString)) ], modal=self.modalResults)
-
-        if self.resultsName and retToks.haskeys():
-            return [ retToks ]
-        else:
-            return retToks
-
-class Group(TokenConverter):
-    """Converter to return the matched tokens as a list - useful for
-    returning tokens of :class:`ZeroOrMore` and :class:`OneOrMore` expressions.
-
-    Example::
-
-        ident = Word(alphas)
-        num = Word(nums)
-        term = ident | num
-        func = ident + Optional(delimitedList(term))
-        print(func.parseString("fn a,b,100"))  # -> ['fn', 'a', 'b', '100']
-
-        func = ident + Group(Optional(delimitedList(term)))
-        print(func.parseString("fn a,b,100"))  # -> ['fn', ['a', 'b', '100']]
-    """
-    def __init__( self, expr ):
-        super(Group,self).__init__( expr )
-        self.saveAsList = expr.saveAsList
-
-    def postParse( self, instring, loc, tokenlist ):
-        return [ tokenlist ]
-
-class Dict(TokenConverter):
-    """Converter to return a repetitive expression as a list, but also
-    as a dictionary. Each element can also be referenced using the first
-    token in the expression as its key. Useful for tabular report
-    scraping when the first column can be used as a item key.
-
-    Example::
-
-        data_word = Word(alphas)
-        label = data_word + FollowedBy(':')
-        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).setParseAction(' '.join))
-
-        text = "shape: SQUARE posn: upper left color: light blue texture: burlap"
-        attr_expr = (label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
-
-        # print attributes as plain groups
-        print(OneOrMore(attr_expr).parseString(text).dump())
-
-        # instead of OneOrMore(expr), parse using Dict(OneOrMore(Group(expr))) - Dict will auto-assign names
-        result = Dict(OneOrMore(Group(attr_expr))).parseString(text)
-        print(result.dump())
-
-        # access named fields as dict entries, or output as dict
-        print(result['shape'])
-        print(result.asDict())
-
-    prints::
-
-        ['shape', 'SQUARE', 'posn', 'upper left', 'color', 'light blue', 'texture', 'burlap']
-        [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']]
-        - color: light blue
-        - posn: upper left
-        - shape: SQUARE
-        - texture: burlap
-        SQUARE
-        {'color': 'light blue', 'posn': 'upper left', 'texture': 'burlap', 'shape': 'SQUARE'}
-
-    See more examples at :class:`ParseResults` of accessing fields by results name.
-    """
-    def __init__( self, expr ):
-        super(Dict,self).__init__( expr )
-        self.saveAsList = True
-
-    def postParse( self, instring, loc, tokenlist ):
-        for i,tok in enumerate(tokenlist):
-            if len(tok) == 0:
-                continue
-            ikey = tok[0]
-            if isinstance(ikey,int):
-                ikey = _ustr(tok[0]).strip()
-            if len(tok)==1:
-                tokenlist[ikey] = _ParseResultsWithOffset("",i)
-            elif len(tok)==2 and not isinstance(tok[1],ParseResults):
-                tokenlist[ikey] = _ParseResultsWithOffset(tok[1],i)
-            else:
-                dictvalue = tok.copy() #ParseResults(i)
-                del dictvalue[0]
-                if len(dictvalue)!= 1 or (isinstance(dictvalue,ParseResults) and dictvalue.haskeys()):
-                    tokenlist[ikey] = _ParseResultsWithOffset(dictvalue,i)
-                else:
-                    tokenlist[ikey] = _ParseResultsWithOffset(dictvalue[0],i)
-
-        if self.resultsName:
-            return [ tokenlist ]
-        else:
-            return tokenlist
-
-
-class Suppress(TokenConverter):
-    """Converter for ignoring the results of a parsed expression.
-
-    Example::
-
-        source = "a, b, c,d"
-        wd = Word(alphas)
-        wd_list1 = wd + ZeroOrMore(',' + wd)
-        print(wd_list1.parseString(source))
-
-        # often, delimiters that are useful during parsing are just in the
-        # way afterward - use Suppress to keep them out of the parsed output
-        wd_list2 = wd + ZeroOrMore(Suppress(',') + wd)
-        print(wd_list2.parseString(source))
-
-    prints::
-
-        ['a', ',', 'b', ',', 'c', ',', 'd']
-        ['a', 'b', 'c', 'd']
-
-    (See also :class:`delimitedList`.)
-    """
-    def postParse( self, instring, loc, tokenlist ):
-        return []
-
-    def suppress( self ):
-        return self
-
-
-class OnlyOnce(object):
-    """Wrapper for parse actions, to ensure they are only called once.
-    """
-    def __init__(self, methodCall):
-        self.callable = _trim_arity(methodCall)
-        self.called = False
-    def __call__(self,s,l,t):
-        if not self.called:
-            results = self.callable(s,l,t)
-            self.called = True
-            return results
-        raise ParseException(s,l,"")
-    def reset(self):
-        self.called = False
-
-def traceParseAction(f):
-    """Decorator for debugging parse actions.
-
-    When the parse action is called, this decorator will print
-    ``">> entering method-name(line:<current_source_line>, <parse_location>, <matched_tokens>)"``.
-    When the parse action completes, the decorator will print
-    ``"<<"`` followed by the returned value, or any exception that the parse action raised.
-
-    Example::
-
-        wd = Word(alphas)
-
-        @traceParseAction
-        def remove_duplicate_chars(tokens):
-            return ''.join(sorted(set(''.join(tokens))))
-
-        wds = OneOrMore(wd).setParseAction(remove_duplicate_chars)
-        print(wds.parseString("slkdjs sld sldd sdlf sdljf"))
-
-    prints::
-
-        >>entering remove_duplicate_chars(line: 'slkdjs sld sldd sdlf sdljf', 0, (['slkdjs', 'sld', 'sldd', 'sdlf', 'sdljf'], {}))
-        <<leaving remove_duplicate_chars (ret: 'dfjkls')
-        ['dfjkls']
-    """
-    f = _trim_arity(f)
-    def z(*paArgs):
-        thisFunc = f.__name__
-        s,l,t = paArgs[-3:]
-        if len(paArgs)>3:
-            thisFunc = paArgs[0].__class__.__name__ + '.' + thisFunc
-        sys.stderr.write( ">>entering %s(line: '%s', %d, %r)\n" % (thisFunc,line(l,s),l,t) )
-        try:
-            ret = f(*paArgs)
-        except Exception as exc:
-            sys.stderr.write( "<<leaving %s (exception: %s)\n" % (thisFunc,exc) )
-            raise
-        sys.stderr.write( "<<leaving %s (ret: %r)\n" % (thisFunc,ret) )
-        return ret
-    try:
-        z.__name__ = f.__name__
-    except AttributeError:
-        pass
-    return z
-
-#
-# global helpers
-#
-def delimitedList( expr, delim=",", combine=False ):
-    """Helper to define a delimited list of expressions - the delimiter
-    defaults to ','. By default, the list elements and delimiters can
-    have intervening whitespace, and comments, but this can be
-    overridden by passing ``combine=True`` in the constructor. If
-    ``combine`` is set to ``True``, the matching tokens are
-    returned as a single token string, with the delimiters included;
-    otherwise, the matching tokens are returned as a list of tokens,
-    with the delimiters suppressed.
-
-    Example::
-
-        delimitedList(Word(alphas)).parseString("aa,bb,cc") # -> ['aa', 'bb', 'cc']
-        delimitedList(Word(hexnums), delim=':', combine=True).parseString("AA:BB:CC:DD:EE") # -> ['AA:BB:CC:DD:EE']
-    """
-    dlName = _ustr(expr)+" ["+_ustr(delim)+" "+_ustr(expr)+"]..."
-    if combine:
-        return Combine( expr + ZeroOrMore( delim + expr ) ).setName(dlName)
-    else:
-        return ( expr + ZeroOrMore( Suppress( delim ) + expr ) ).setName(dlName)
-
-def countedArray( expr, intExpr=None ):
-    """Helper to define a counted list of expressions.
-
-    This helper defines a pattern of the form::
-
-        integer expr expr expr...
-
-    where the leading integer tells how many expr expressions follow.
-    The matched tokens returns the array of expr tokens as a list - the
-    leading count token is suppressed.
-
-    If ``intExpr`` is specified, it should be a pyparsing expression
-    that produces an integer value.
-
-    Example::
-
-        countedArray(Word(alphas)).parseString('2 ab cd ef')  # -> ['ab', 'cd']
-
-        # in this parser, the leading integer value is given in binary,
-        # '10' indicating that 2 values are in the array
-        binaryConstant = Word('01').setParseAction(lambda t: int(t[0], 2))
-        countedArray(Word(alphas), intExpr=binaryConstant).parseString('10 ab cd ef')  # -> ['ab', 'cd']
-    """
-    arrayExpr = Forward()
-    def countFieldParseAction(s,l,t):
-        n = t[0]
-        arrayExpr << (n and Group(And([expr]*n)) or Group(empty))
-        return []
-    if intExpr is None:
-        intExpr = Word(nums).setParseAction(lambda t:int(t[0]))
-    else:
-        intExpr = intExpr.copy()
-    intExpr.setName("arrayLen")
-    intExpr.addParseAction(countFieldParseAction, callDuringTry=True)
-    return ( intExpr + arrayExpr ).setName('(len) ' + _ustr(expr) + '...')
-
-def _flatten(L):
-    ret = []
-    for i in L:
-        if isinstance(i,list):
-            ret.extend(_flatten(i))
-        else:
-            ret.append(i)
-    return ret
-
-def matchPreviousLiteral(expr):
-    """Helper to define an expression that is indirectly defined from
-    the tokens matched in a previous expression, that is, it looks for
-    a 'repeat' of a previous expression.  For example::
-
-        first = Word(nums)
-        second = matchPreviousLiteral(first)
-        matchExpr = first + ":" + second
-
-    will match ``"1:1"``, but not ``"1:2"``.  Because this
-    matches a previous literal, will also match the leading
-    ``"1:1"`` in ``"1:10"``. If this is not desired, use
-    :class:`matchPreviousExpr`. Do *not* use with packrat parsing
-    enabled.
-    """
-    rep = Forward()
-    def copyTokenToRepeater(s,l,t):
-        if t:
-            if len(t) == 1:
-                rep << t[0]
-            else:
-                # flatten t tokens
-                tflat = _flatten(t.asList())
-                rep << And(Literal(tt) for tt in tflat)
-        else:
-            rep << Empty()
-    expr.addParseAction(copyTokenToRepeater, callDuringTry=True)
-    rep.setName('(prev) ' + _ustr(expr))
-    return rep
-
-def matchPreviousExpr(expr):
-    """Helper to define an expression that is indirectly defined from
-    the tokens matched in a previous expression, that is, it looks for
-    a 'repeat' of a previous expression.  For example::
-
-        first = Word(nums)
-        second = matchPreviousExpr(first)
-        matchExpr = first + ":" + second
-
-    will match ``"1:1"``, but not ``"1:2"``.  Because this
-    matches by expressions, will *not* match the leading ``"1:1"``
-    in ``"1:10"``; the expressions are evaluated first, and then
-    compared, so ``"1"`` is compared with ``"10"``. Do *not* use
-    with packrat parsing enabled.
-    """
-    rep = Forward()
-    e2 = expr.copy()
-    rep <<= e2
-    def copyTokenToRepeater(s,l,t):
-        matchTokens = _flatten(t.asList())
-        def mustMatchTheseTokens(s,l,t):
-            theseTokens = _flatten(t.asList())
-            if  theseTokens != matchTokens:
-                raise ParseException("",0,"")
-        rep.setParseAction( mustMatchTheseTokens, callDuringTry=True )
-    expr.addParseAction(copyTokenToRepeater, callDuringTry=True)
-    rep.setName('(prev) ' + _ustr(expr))
-    return rep
-
-def _escapeRegexRangeChars(s):
-    #~  escape these chars: ^-]
-    for c in r"\^-]":
-        s = s.replace(c,_bslash+c)
-    s = s.replace("\n",r"\n")
-    s = s.replace("\t",r"\t")
-    return _ustr(s)
-
-def oneOf( strs, caseless=False, useRegex=True ):
-    """Helper to quickly define a set of alternative Literals, and makes
-    sure to do longest-first testing when there is a conflict,
-    regardless of the input order, but returns
-    a :class:`MatchFirst` for best performance.
-
-    Parameters:
-
-     - strs - a string of space-delimited literals, or a collection of
-       string literals
-     - caseless - (default= ``False``) - treat all literals as
-       caseless
-     - useRegex - (default= ``True``) - as an optimization, will
-       generate a Regex object; otherwise, will generate
-       a :class:`MatchFirst` object (if ``caseless=True``, or if
-       creating a :class:`Regex` raises an exception)
-
-    Example::
-
-        comp_oper = oneOf("< = > <= >= !=")
-        var = Word(alphas)
-        number = Word(nums)
-        term = var | number
-        comparison_expr = term + comp_oper + term
-        print(comparison_expr.searchString("B = 12  AA=23 B<=AA AA>12"))
-
-    prints::
-
-        [['B', '=', '12'], ['AA', '=', '23'], ['B', '<=', 'AA'], ['AA', '>', '12']]
-    """
-    if caseless:
-        isequal = ( lambda a,b: a.upper() == b.upper() )
-        masks = ( lambda a,b: b.upper().startswith(a.upper()) )
-        parseElementClass = CaselessLiteral
-    else:
-        isequal = ( lambda a,b: a == b )
-        masks = ( lambda a,b: b.startswith(a) )
-        parseElementClass = Literal
-
-    symbols = []
-    if isinstance(strs,basestring):
-        symbols = strs.split()
-    elif isinstance(strs, Iterable):
-        symbols = list(strs)
-    else:
-        warnings.warn("Invalid argument to oneOf, expected string or iterable",
-                SyntaxWarning, stacklevel=2)
-    if not symbols:
-        return NoMatch()
-
-    i = 0
-    while i < len(symbols)-1:
-        cur = symbols[i]
-        for j,other in enumerate(symbols[i+1:]):
-            if ( isequal(other, cur) ):
-                del symbols[i+j+1]
-                break
-            elif ( masks(cur, other) ):
-                del symbols[i+j+1]
-                symbols.insert(i,other)
-                cur = other
-                break
-        else:
-            i += 1
-
-    if not caseless and useRegex:
-        #~ print (strs,"->", "|".join( [ _escapeRegexChars(sym) for sym in symbols] ))
-        try:
-            if len(symbols)==len("".join(symbols)):
-                return Regex( "[%s]" % "".join(_escapeRegexRangeChars(sym) for sym in symbols) ).setName(' | '.join(symbols))
-            else:
-                return Regex( "|".join(re.escape(sym) for sym in symbols) ).setName(' | '.join(symbols))
-        except Exception:
-            warnings.warn("Exception creating Regex for oneOf, building MatchFirst",
-                    SyntaxWarning, stacklevel=2)
-
-
-    # last resort, just use MatchFirst
-    return MatchFirst(parseElementClass(sym) for sym in symbols).setName(' | '.join(symbols))
-
-def dictOf( key, value ):
-    """Helper to easily and clearly define a dictionary by specifying
-    the respective patterns for the key and value.  Takes care of
-    defining the :class:`Dict`, :class:`ZeroOrMore`, and
-    :class:`Group` tokens in the proper order.  The key pattern
-    can include delimiting markers or punctuation, as long as they are
-    suppressed, thereby leaving the significant key text.  The value
-    pattern can include named results, so that the :class:`Dict` results
-    can include named token fields.
-
-    Example::
-
-        text = "shape: SQUARE posn: upper left color: light blue texture: burlap"
-        attr_expr = (label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
-        print(OneOrMore(attr_expr).parseString(text).dump())
-
-        attr_label = label
-        attr_value = Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join)
-
-        # similar to Dict, but simpler call format
-        result = dictOf(attr_label, attr_value).parseString(text)
-        print(result.dump())
-        print(result['shape'])
-        print(result.shape)  # object attribute access works too
-        print(result.asDict())
-
-    prints::
-
-        [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']]
-        - color: light blue
-        - posn: upper left
-        - shape: SQUARE
-        - texture: burlap
-        SQUARE
-        SQUARE
-        {'color': 'light blue', 'shape': 'SQUARE', 'posn': 'upper left', 'texture': 'burlap'}
-    """
-    return Dict(OneOrMore(Group(key + value)))
-
-def originalTextFor(expr, asString=True):
-    """Helper to return the original, untokenized text for a given
-    expression.  Useful to restore the parsed fields of an HTML start
-    tag into the raw tag text itself, or to revert separate tokens with
-    intervening whitespace back to the original matching input text. By
-    default, returns astring containing the original parsed text.
-
-    If the optional ``asString`` argument is passed as
-    ``False``, then the return value is
-    a :class:`ParseResults` containing any results names that
-    were originally matched, and a single token containing the original
-    matched text from the input string.  So if the expression passed to
-    :class:`originalTextFor` contains expressions with defined
-    results names, you must set ``asString`` to ``False`` if you
-    want to preserve those results name values.
-
-    Example::
-
-        src = "this is test <b> bold <i>text</i> </b> normal text "
-        for tag in ("b","i"):
-            opener,closer = makeHTMLTags(tag)
-            patt = originalTextFor(opener + SkipTo(closer) + closer)
-            print(patt.searchString(src)[0])
-
-    prints::
-
-        ['<b> bold <i>text</i> </b>']
-        ['<i>text</i>']
-    """
-    locMarker = Empty().setParseAction(lambda s,loc,t: loc)
-    endlocMarker = locMarker.copy()
-    endlocMarker.callPreparse = False
-    matchExpr = locMarker("_original_start") + expr + endlocMarker("_original_end")
-    if asString:
-        extractText = lambda s,l,t: s[t._original_start:t._original_end]
-    else:
-        def extractText(s,l,t):
-            t[:] = [s[t.pop('_original_start'):t.pop('_original_end')]]
-    matchExpr.setParseAction(extractText)
-    matchExpr.ignoreExprs = expr.ignoreExprs
-    return matchExpr
-
-def ungroup(expr):
-    """Helper to undo pyparsing's default grouping of And expressions,
-    even if all but one are non-empty.
-    """
-    return TokenConverter(expr).setParseAction(lambda t:t[0])
-
-def locatedExpr(expr):
-    """Helper to decorate a returned token with its starting and ending
-    locations in the input string.
-
-    This helper adds the following results names:
-
-     - locn_start = location where matched expression begins
-     - locn_end = location where matched expression ends
-     - value = the actual parsed results
-
-    Be careful if the input text contains ``<TAB>`` characters, you
-    may want to call :class:`ParserElement.parseWithTabs`
-
-    Example::
-
-        wd = Word(alphas)
-        for match in locatedExpr(wd).searchString("ljsdf123lksdjjf123lkkjj1222"):
-            print(match)
-
-    prints::
-
-        [[0, 'ljsdf', 5]]
-        [[8, 'lksdjjf', 15]]
-        [[18, 'lkkjj', 23]]
-    """
-    locator = Empty().setParseAction(lambda s,l,t: l)
-    return Group(locator("locn_start") + expr("value") + locator.copy().leaveWhitespace()("locn_end"))
-
-
-# convenience constants for positional expressions
-empty       = Empty().setName("empty")
-lineStart   = LineStart().setName("lineStart")
-lineEnd     = LineEnd().setName("lineEnd")
-stringStart = StringStart().setName("stringStart")
-stringEnd   = StringEnd().setName("stringEnd")
-
-_escapedPunc = Word( _bslash, r"\[]-*.$+^?()~ ", exact=2 ).setParseAction(lambda s,l,t:t[0][1])
-_escapedHexChar = Regex(r"\\0?[xX][0-9a-fA-F]+").setParseAction(lambda s,l,t:unichr(int(t[0].lstrip(r'\0x'),16)))
-_escapedOctChar = Regex(r"\\0[0-7]+").setParseAction(lambda s,l,t:unichr(int(t[0][1:],8)))
-_singleChar = _escapedPunc | _escapedHexChar | _escapedOctChar | CharsNotIn(r'\]', exact=1)
-_charRange = Group(_singleChar + Suppress("-") + _singleChar)
-_reBracketExpr = Literal("[") + Optional("^").setResultsName("negate") + Group( OneOrMore( _charRange | _singleChar ) ).setResultsName("body") + "]"
-
-def srange(s):
-    r"""Helper to easily define string ranges for use in Word
-    construction. Borrows syntax from regexp '[]' string range
-    definitions::
-
-        srange("[0-9]")   -> "0123456789"
-        srange("[a-z]")   -> "abcdefghijklmnopqrstuvwxyz"
-        srange("[a-z$_]") -> "abcdefghijklmnopqrstuvwxyz$_"
-
-    The input string must be enclosed in []'s, and the returned string
-    is the expanded character set joined into a single string. The
-    values enclosed in the []'s may be:
-
-     - a single character
-     - an escaped character with a leading backslash (such as ``\-``
-       or ``\]``)
-     - an escaped hex character with a leading ``'\x'``
-       (``\x21``, which is a ``'!'`` character) (``\0x##``
-       is also supported for backwards compatibility)
-     - an escaped octal character with a leading ``'\0'``
-       (``\041``, which is a ``'!'`` character)
-     - a range of any of the above, separated by a dash (``'a-z'``,
-       etc.)
-     - any combination of the above (``'aeiouy'``,
-       ``'a-zA-Z0-9_$'``, etc.)
-    """
-    _expanded = lambda p: p if not isinstance(p,ParseResults) else ''.join(unichr(c) for c in range(ord(p[0]),ord(p[1])+1))
-    try:
-        return "".join(_expanded(part) for part in _reBracketExpr.parseString(s).body)
-    except Exception:
-        return ""
-
-def matchOnlyAtCol(n):
-    """Helper method for defining parse actions that require matching at
-    a specific column in the input text.
-    """
-    def verifyCol(strg,locn,toks):
-        if col(locn,strg) != n:
-            raise ParseException(strg,locn,"matched token not at column %d" % n)
-    return verifyCol
-
-def replaceWith(replStr):
-    """Helper method for common parse actions that simply return
-    a literal value.  Especially useful when used with
-    :class:`transformString<ParserElement.transformString>` ().
-
-    Example::
-
-        num = Word(nums).setParseAction(lambda toks: int(toks[0]))
-        na = oneOf("N/A NA").setParseAction(replaceWith(math.nan))
-        term = na | num
-
-        OneOrMore(term).parseString("324 234 N/A 234") # -> [324, 234, nan, 234]
-    """
-    return lambda s,l,t: [replStr]
-
-def removeQuotes(s,l,t):
-    """Helper parse action for removing quotation marks from parsed
-    quoted strings.
-
-    Example::
-
-        # by default, quotation marks are included in parsed results
-        quotedString.parseString("'Now is the Winter of our Discontent'") # -> ["'Now is the Winter of our Discontent'"]
-
-        # use removeQuotes to strip quotation marks from parsed results
-        quotedString.setParseAction(removeQuotes)
-        quotedString.parseString("'Now is the Winter of our Discontent'") # -> ["Now is the Winter of our Discontent"]
-    """
-    return t[0][1:-1]
-
-def tokenMap(func, *args):
-    """Helper to define a parse action by mapping a function to all
-    elements of a ParseResults list. If any additional args are passed,
-    they are forwarded to the given function as additional arguments
-    after the token, as in
-    ``hex_integer = Word(hexnums).setParseAction(tokenMap(int, 16))``,
-    which will convert the parsed data to an integer using base 16.
-
-    Example (compare the last to example in :class:`ParserElement.transformString`::
-
-        hex_ints = OneOrMore(Word(hexnums)).setParseAction(tokenMap(int, 16))
-        hex_ints.runTests('''
-            00 11 22 aa FF 0a 0d 1a
-            ''')
-
-        upperword = Word(alphas).setParseAction(tokenMap(str.upper))
-        OneOrMore(upperword).runTests('''
-            my kingdom for a horse
-            ''')
-
-        wd = Word(alphas).setParseAction(tokenMap(str.title))
-        OneOrMore(wd).setParseAction(' '.join).runTests('''
-            now is the winter of our discontent made glorious summer by this sun of york
-            ''')
-
-    prints::
-
-        00 11 22 aa FF 0a 0d 1a
-        [0, 17, 34, 170, 255, 10, 13, 26]
-
-        my kingdom for a horse
-        ['MY', 'KINGDOM', 'FOR', 'A', 'HORSE']
-
-        now is the winter of our discontent made glorious summer by this sun of york
-        ['Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York']
-    """
-    def pa(s,l,t):
-        return [func(tokn, *args) for tokn in t]
-
-    try:
-        func_name = getattr(func, '__name__',
-                            getattr(func, '__class__').__name__)
-    except Exception:
-        func_name = str(func)
-    pa.__name__ = func_name
-
-    return pa
-
-upcaseTokens = tokenMap(lambda t: _ustr(t).upper())
-"""(Deprecated) Helper parse action to convert tokens to upper case.
-Deprecated in favor of :class:`pyparsing_common.upcaseTokens`"""
-
-downcaseTokens = tokenMap(lambda t: _ustr(t).lower())
-"""(Deprecated) Helper parse action to convert tokens to lower case.
-Deprecated in favor of :class:`pyparsing_common.downcaseTokens`"""
-
-def _makeTags(tagStr, xml):
-    """Internal helper to construct opening and closing tag expressions, given a tag name"""
-    if isinstance(tagStr,basestring):
-        resname = tagStr
-        tagStr = Keyword(tagStr, caseless=not xml)
-    else:
-        resname = tagStr.name
-
-    tagAttrName = Word(alphas,alphanums+"_-:")
-    if (xml):
-        tagAttrValue = dblQuotedString.copy().setParseAction( removeQuotes )
-        openTag = Suppress("<") + tagStr("tag") + \
-                Dict(ZeroOrMore(Group( tagAttrName + Suppress("=") + tagAttrValue ))) + \
-                Optional("/",default=[False]).setResultsName("empty").setParseAction(lambda s,l,t:t[0]=='/') + Suppress(">")
-    else:
-        printablesLessRAbrack = "".join(c for c in printables if c not in ">")
-        tagAttrValue = quotedString.copy().setParseAction( removeQuotes ) | Word(printablesLessRAbrack)
-        openTag = Suppress("<") + tagStr("tag") + \
-                Dict(ZeroOrMore(Group( tagAttrName.setParseAction(downcaseTokens) + \
-                Optional( Suppress("=") + tagAttrValue ) ))) + \
-                Optional("/",default=[False]).setResultsName("empty").setParseAction(lambda s,l,t:t[0]=='/') + Suppress(">")
-    closeTag = Combine(_L("</") + tagStr + ">")
-
-    openTag = openTag.setResultsName("start"+"".join(resname.replace(":"," ").title().split())).setName("<%s>" % resname)
-    closeTag = closeTag.setResultsName("end"+"".join(resname.replace(":"," ").title().split())).setName("</%s>" % resname)
-    openTag.tag = resname
-    closeTag.tag = resname
-    return openTag, closeTag
-
-def makeHTMLTags(tagStr):
-    """Helper to construct opening and closing tag expressions for HTML,
-    given a tag name. Matches tags in either upper or lower case,
-    attributes with namespaces and with quoted or unquoted values.
-
-    Example::
-
-        text = '<td>More info at the <a href="https://github.com/pyparsing/pyparsing/wiki">pyparsing</a> wiki page</td>'
-        # makeHTMLTags returns pyparsing expressions for the opening and
-        # closing tags as a 2-tuple
-        a,a_end = makeHTMLTags("A")
-        link_expr = a + SkipTo(a_end)("link_text") + a_end
-
-        for link in link_expr.searchString(text):
-            # attributes in the <A> tag (like "href" shown here) are
-            # also accessible as named results
-            print(link.link_text, '->', link.href)
-
-    prints::
-
-        pyparsing -> https://github.com/pyparsing/pyparsing/wiki
-    """
-    return _makeTags( tagStr, False )
-
-def makeXMLTags(tagStr):
-    """Helper to construct opening and closing tag expressions for XML,
-    given a tag name. Matches tags only in the given upper/lower case.
-
-    Example: similar to :class:`makeHTMLTags`
-    """
-    return _makeTags( tagStr, True )
-
-def withAttribute(*args,**attrDict):
-    """Helper to create a validating parse action to be used with start
-    tags created with :class:`makeXMLTags` or
-    :class:`makeHTMLTags`. Use ``withAttribute`` to qualify
-    a starting tag with a required attribute value, to avoid false
-    matches on common tags such as ``<TD>`` or ``<DIV>``.
-
-    Call ``withAttribute`` with a series of attribute names and
-    values. Specify the list of filter attributes names and values as:
-
-     - keyword arguments, as in ``(align="right")``, or
-     - as an explicit dict with ``**`` operator, when an attribute
-       name is also a Python reserved word, as in ``**{"class":"Customer", "align":"right"}``
-     - a list of name-value tuples, as in ``(("ns1:class", "Customer"), ("ns2:align","right"))``
-
-    For attribute names with a namespace prefix, you must use the second
-    form.  Attribute names are matched insensitive to upper/lower case.
-
-    If just testing for ``class`` (with or without a namespace), use
-    :class:`withClass`.
-
-    To verify that the attribute exists, but without specifying a value,
-    pass ``withAttribute.ANY_VALUE`` as the value.
-
-    Example::
-
-        html = '''
-            <div>
-            Some text
-            <div type="grid">1 4 0 1 0</div>
-            <div type="graph">1,3 2,3 1,1</div>
-            <div>this has no type</div>
-            </div>
-
-        '''
-        div,div_end = makeHTMLTags("div")
-
-        # only match div tag having a type attribute with value "grid"
-        div_grid = div().setParseAction(withAttribute(type="grid"))
-        grid_expr = div_grid + SkipTo(div | div_end)("body")
-        for grid_header in grid_expr.searchString(html):
-            print(grid_header.body)
-
-        # construct a match with any div tag having a type attribute, regardless of the value
-        div_any_type = div().setParseAction(withAttribute(type=withAttribute.ANY_VALUE))
-        div_expr = div_any_type + SkipTo(div | div_end)("body")
-        for div_header in div_expr.searchString(html):
-            print(div_header.body)
-
-    prints::
-
-        1 4 0 1 0
-
-        1 4 0 1 0
-        1,3 2,3 1,1
-    """
-    if args:
-        attrs = args[:]
-    else:
-        attrs = attrDict.items()
-    attrs = [(k,v) for k,v in attrs]
-    def pa(s,l,tokens):
-        for attrName,attrValue in attrs:
-            if attrName not in tokens:
-                raise ParseException(s,l,"no matching attribute " + attrName)
-            if attrValue != withAttribute.ANY_VALUE and tokens[attrName] != attrValue:
-                raise ParseException(s,l,"attribute '%s' has value '%s', must be '%s'" %
-                                            (attrName, tokens[attrName], attrValue))
-    return pa
-withAttribute.ANY_VALUE = object()
-
-def withClass(classname, namespace=''):
-    """Simplified version of :class:`withAttribute` when
-    matching on a div class - made difficult because ``class`` is
-    a reserved word in Python.
-
-    Example::
-
-        html = '''
-            <div>
-            Some text
-            <div class="grid">1 4 0 1 0</div>
-            <div class="graph">1,3 2,3 1,1</div>
-            <div>this &lt;div&gt; has no class</div>
-            </div>
-
-        '''
-        div,div_end = makeHTMLTags("div")
-        div_grid = div().setParseAction(withClass("grid"))
-
-        grid_expr = div_grid + SkipTo(div | div_end)("body")
-        for grid_header in grid_expr.searchString(html):
-            print(grid_header.body)
-
-        div_any_type = div().setParseAction(withClass(withAttribute.ANY_VALUE))
-        div_expr = div_any_type + SkipTo(div | div_end)("body")
-        for div_header in div_expr.searchString(html):
-            print(div_header.body)
-
-    prints::
-
-        1 4 0 1 0
-
-        1 4 0 1 0
-        1,3 2,3 1,1
-    """
-    classattr = "%s:class" % namespace if namespace else "class"
-    return withAttribute(**{classattr : classname})
-
-opAssoc = SimpleNamespace()
-opAssoc.LEFT = object()
-opAssoc.RIGHT = object()
-
-def infixNotation( baseExpr, opList, lpar=Suppress('('), rpar=Suppress(')') ):
-    """Helper method for constructing grammars of expressions made up of
-    operators working in a precedence hierarchy.  Operators may be unary
-    or binary, left- or right-associative.  Parse actions can also be
-    attached to operator expressions. The generated parser will also
-    recognize the use of parentheses to override operator precedences
-    (see example below).
-
-    Note: if you define a deep operator list, you may see performance
-    issues when using infixNotation. See
-    :class:`ParserElement.enablePackrat` for a mechanism to potentially
-    improve your parser performance.
-
-    Parameters:
-     - baseExpr - expression representing the most basic element for the
-       nested
-     - opList - list of tuples, one for each operator precedence level
-       in the expression grammar; each tuple is of the form ``(opExpr,
-       numTerms, rightLeftAssoc, parseAction)``, where:
-
-       - opExpr is the pyparsing expression for the operator; may also
-         be a string, which will be converted to a Literal; if numTerms
-         is 3, opExpr is a tuple of two expressions, for the two
-         operators separating the 3 terms
-       - numTerms is the number of terms for this operator (must be 1,
-         2, or 3)
-       - rightLeftAssoc is the indicator whether the operator is right
-         or left associative, using the pyparsing-defined constants
-         ``opAssoc.RIGHT`` and ``opAssoc.LEFT``.
-       - parseAction is the parse action to be associated with
-         expressions matching this operator expression (the parse action
-         tuple member may be omitted); if the parse action is passed
-         a tuple or list of functions, this is equivalent to calling
-         ``setParseAction(*fn)``
-         (:class:`ParserElement.setParseAction`)
-     - lpar - expression for matching left-parentheses
-       (default= ``Suppress('(')``)
-     - rpar - expression for matching right-parentheses
-       (default= ``Suppress(')')``)
-
-    Example::
-
-        # simple example of four-function arithmetic with ints and
-        # variable names
-        integer = pyparsing_common.signed_integer
-        varname = pyparsing_common.identifier
-
-        arith_expr = infixNotation(integer | varname,
-            [
-            ('-', 1, opAssoc.RIGHT),
-            (oneOf('* /'), 2, opAssoc.LEFT),
-            (oneOf('+ -'), 2, opAssoc.LEFT),
-            ])
-
-        arith_expr.runTests('''
-            5+3*6
-            (5+3)*6
-            -2--11
-            ''', fullDump=False)
-
-    prints::
-
-        5+3*6
-        [[5, '+', [3, '*', 6]]]
-
-        (5+3)*6
-        [[[5, '+', 3], '*', 6]]
-
-        -2--11
-        [[['-', 2], '-', ['-', 11]]]
-    """
-    # captive version of FollowedBy that does not do parse actions or capture results names
-    class _FB(FollowedBy):
-        def parseImpl(self, instring, loc, doActions=True):
-            self.expr.tryParse(instring, loc)
-            return loc, []
-
-    ret = Forward()
-    lastExpr = baseExpr | ( lpar + ret + rpar )
-    for i,operDef in enumerate(opList):
-        opExpr,arity,rightLeftAssoc,pa = (operDef + (None,))[:4]
-        termName = "%s term" % opExpr if arity < 3 else "%s%s term" % opExpr
-        if arity == 3:
-            if opExpr is None or len(opExpr) != 2:
-                raise ValueError(
-                    "if numterms=3, opExpr must be a tuple or list of two expressions")
-            opExpr1, opExpr2 = opExpr
-        thisExpr = Forward().setName(termName)
-        if rightLeftAssoc == opAssoc.LEFT:
-            if arity == 1:
-                matchExpr = _FB(lastExpr + opExpr) + Group( lastExpr + OneOrMore( opExpr ) )
-            elif arity == 2:
-                if opExpr is not None:
-                    matchExpr = _FB(lastExpr + opExpr + lastExpr) + Group( lastExpr + OneOrMore( opExpr + lastExpr ) )
-                else:
-                    matchExpr = _FB(lastExpr+lastExpr) + Group( lastExpr + OneOrMore(lastExpr) )
-            elif arity == 3:
-                matchExpr = _FB(lastExpr + opExpr1 + lastExpr + opExpr2 + lastExpr) + \
-                            Group( lastExpr + opExpr1 + lastExpr + opExpr2 + lastExpr )
-            else:
-                raise ValueError("operator must be unary (1), binary (2), or ternary (3)")
-        elif rightLeftAssoc == opAssoc.RIGHT:
-            if arity == 1:
-                # try to avoid LR with this extra test
-                if not isinstance(opExpr, Optional):
-                    opExpr = Optional(opExpr)
-                matchExpr = _FB(opExpr.expr + thisExpr) + Group( opExpr + thisExpr )
-            elif arity == 2:
-                if opExpr is not None:
-                    matchExpr = _FB(lastExpr + opExpr + thisExpr) + Group( lastExpr + OneOrMore( opExpr + thisExpr ) )
-                else:
-                    matchExpr = _FB(lastExpr + thisExpr) + Group( lastExpr + OneOrMore( thisExpr ) )
-            elif arity == 3:
-                matchExpr = _FB(lastExpr + opExpr1 + thisExpr + opExpr2 + thisExpr) + \
-                            Group( lastExpr + opExpr1 + thisExpr + opExpr2 + thisExpr )
-            else:
-                raise ValueError("operator must be unary (1), binary (2), or ternary (3)")
-        else:
-            raise ValueError("operator must indicate right or left associativity")
-        if pa:
-            if isinstance(pa, (tuple, list)):
-                matchExpr.setParseAction(*pa)
-            else:
-                matchExpr.setParseAction(pa)
-        thisExpr <<= ( matchExpr.setName(termName) | lastExpr )
-        lastExpr = thisExpr
-    ret <<= lastExpr
-    return ret
-
-operatorPrecedence = infixNotation
-"""(Deprecated) Former name of :class:`infixNotation`, will be
-dropped in a future release."""
-
-dblQuotedString = Combine(Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*')+'"').setName("string enclosed in double quotes")
-sglQuotedString = Combine(Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*")+"'").setName("string enclosed in single quotes")
-quotedString = Combine(Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*')+'"'|
-                       Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*")+"'").setName("quotedString using single or double quotes")
-unicodeString = Combine(_L('u') + quotedString.copy()).setName("unicode string literal")
-
-def nestedExpr(opener="(", closer=")", content=None, ignoreExpr=quotedString.copy()):
-    """Helper method for defining nested lists enclosed in opening and
-    closing delimiters ("(" and ")" are the default).
-
-    Parameters:
-     - opener - opening character for a nested list
-       (default= ``"("``); can also be a pyparsing expression
-     - closer - closing character for a nested list
-       (default= ``")"``); can also be a pyparsing expression
-     - content - expression for items within the nested lists
-       (default= ``None``)
-     - ignoreExpr - expression for ignoring opening and closing
-       delimiters (default= :class:`quotedString`)
-
-    If an expression is not provided for the content argument, the
-    nested expression will capture all whitespace-delimited content
-    between delimiters as a list of separate values.
-
-    Use the ``ignoreExpr`` argument to define expressions that may
-    contain opening or closing characters that should not be treated as
-    opening or closing characters for nesting, such as quotedString or
-    a comment expression.  Specify multiple expressions using an
-    :class:`Or` or :class:`MatchFirst`. The default is
-    :class:`quotedString`, but if no expressions are to be ignored, then
-    pass ``None`` for this argument.
-
-    Example::
-
-        data_type = oneOf("void int short long char float double")
-        decl_data_type = Combine(data_type + Optional(Word('*')))
-        ident = Word(alphas+'_', alphanums+'_')
-        number = pyparsing_common.number
-        arg = Group(decl_data_type + ident)
-        LPAR,RPAR = map(Suppress, "()")
-
-        code_body = nestedExpr('{', '}', ignoreExpr=(quotedString | cStyleComment))
-
-        c_function = (decl_data_type("type")
-                      + ident("name")
-                      + LPAR + Optional(delimitedList(arg), [])("args") + RPAR
-                      + code_body("body"))
-        c_function.ignore(cStyleComment)
-
-        source_code = '''
-            int is_odd(int x) {
-                return (x%2);
-            }
-
-            int dec_to_hex(char hchar) {
-                if (hchar >= '0' && hchar <= '9') {
-                    return (ord(hchar)-ord('0'));
-                } else {
-                    return (10+ord(hchar)-ord('A'));
-                }
-            }
-        '''
-        for func in c_function.searchString(source_code):
-            print("%(name)s (%(type)s) args: %(args)s" % func)
-
-
-    prints::
-
-        is_odd (int) args: [['int', 'x']]
-        dec_to_hex (int) args: [['char', 'hchar']]
-    """
-    if opener == closer:
-        raise ValueError("opening and closing strings cannot be the same")
-    if content is None:
-        if isinstance(opener,basestring) and isinstance(closer,basestring):
-            if len(opener) == 1 and len(closer)==1:
-                if ignoreExpr is not None:
-                    content = (Combine(OneOrMore(~ignoreExpr +
-                                    CharsNotIn(opener+closer+ParserElement.DEFAULT_WHITE_CHARS,exact=1))
-                                ).setParseAction(lambda t:t[0].strip()))
-                else:
-                    content = (empty.copy()+CharsNotIn(opener+closer+ParserElement.DEFAULT_WHITE_CHARS
-                                ).setParseAction(lambda t:t[0].strip()))
-            else:
-                if ignoreExpr is not None:
-                    content = (Combine(OneOrMore(~ignoreExpr +
-                                    ~Literal(opener) + ~Literal(closer) +
-                                    CharsNotIn(ParserElement.DEFAULT_WHITE_CHARS,exact=1))
-                                ).setParseAction(lambda t:t[0].strip()))
-                else:
-                    content = (Combine(OneOrMore(~Literal(opener) + ~Literal(closer) +
-                                    CharsNotIn(ParserElement.DEFAULT_WHITE_CHARS,exact=1))
-                                ).setParseAction(lambda t:t[0].strip()))
-        else:
-            raise ValueError("opening and closing arguments must be strings if no content expression is given")
-    ret = Forward()
-    if ignoreExpr is not None:
-        ret <<= Group( Suppress(opener) + ZeroOrMore( ignoreExpr | ret | content ) + Suppress(closer) )
-    else:
-        ret <<= Group( Suppress(opener) + ZeroOrMore( ret | content )  + Suppress(closer) )
-    ret.setName('nested %s%s expression' % (opener,closer))
-    return ret
-
-def indentedBlock(blockStatementExpr, indentStack, indent=True):
-    """Helper method for defining space-delimited indentation blocks,
-    such as those used to define block statements in Python source code.
-
-    Parameters:
-
-     - blockStatementExpr - expression defining syntax of statement that
-       is repeated within the indented block
-     - indentStack - list created by caller to manage indentation stack
-       (multiple statementWithIndentedBlock expressions within a single
-       grammar should share a common indentStack)
-     - indent - boolean indicating whether block must be indented beyond
-       the the current level; set to False for block of left-most
-       statements (default= ``True``)
-
-    A valid block must contain at least one ``blockStatement``.
-
-    Example::
-
-        data = '''
-        def A(z):
-          A1
-          B = 100
-          G = A2
-          A2
-          A3
-        B
-        def BB(a,b,c):
-          BB1
-          def BBA():
-            bba1
-            bba2
-            bba3
-        C
-        D
-        def spam(x,y):
-             def eggs(z):
-                 pass
-        '''
-
-
-        indentStack = [1]
-        stmt = Forward()
-
-        identifier = Word(alphas, alphanums)
-        funcDecl = ("def" + identifier + Group( "(" + Optional( delimitedList(identifier) ) + ")" ) + ":")
-        func_body = indentedBlock(stmt, indentStack)
-        funcDef = Group( funcDecl + func_body )
-
-        rvalue = Forward()
-        funcCall = Group(identifier + "(" + Optional(delimitedList(rvalue)) + ")")
-        rvalue << (funcCall | identifier | Word(nums))
-        assignment = Group(identifier + "=" + rvalue)
-        stmt << ( funcDef | assignment | identifier )
-
-        module_body = OneOrMore(stmt)
-
-        parseTree = module_body.parseString(data)
-        parseTree.pprint()
-
-    prints::
-
-        [['def',
-          'A',
-          ['(', 'z', ')'],
-          ':',
-          [['A1'], [['B', '=', '100']], [['G', '=', 'A2']], ['A2'], ['A3']]],
-         'B',
-         ['def',
-          'BB',
-          ['(', 'a', 'b', 'c', ')'],
-          ':',
-          [['BB1'], [['def', 'BBA', ['(', ')'], ':', [['bba1'], ['bba2'], ['bba3']]]]]],
-         'C',
-         'D',
-         ['def',
-          'spam',
-          ['(', 'x', 'y', ')'],
-          ':',
-          [[['def', 'eggs', ['(', 'z', ')'], ':', [['pass']]]]]]]
-    """
-    def checkPeerIndent(s,l,t):
-        if l >= len(s): return
-        curCol = col(l,s)
-        if curCol != indentStack[-1]:
-            if curCol > indentStack[-1]:
-                raise ParseFatalException(s,l,"illegal nesting")
-            raise ParseException(s,l,"not a peer entry")
-
-    def checkSubIndent(s,l,t):
-        curCol = col(l,s)
-        if curCol > indentStack[-1]:
-            indentStack.append( curCol )
-        else:
-            raise ParseException(s,l,"not a subentry")
-
-    def checkUnindent(s,l,t):
-        if l >= len(s): return
-        curCol = col(l,s)
-        if not(indentStack and curCol < indentStack[-1] and curCol <= indentStack[-2]):
-            raise ParseException(s,l,"not an unindent")
-        indentStack.pop()
-
-    NL = OneOrMore(LineEnd().setWhitespaceChars("\t ").suppress())
-    INDENT = (Empty() + Empty().setParseAction(checkSubIndent)).setName('INDENT')
-    PEER   = Empty().setParseAction(checkPeerIndent).setName('')
-    UNDENT = Empty().setParseAction(checkUnindent).setName('UNINDENT')
-    if indent:
-        smExpr = Group( Optional(NL) +
-            #~ FollowedBy(blockStatementExpr) +
-            INDENT + (OneOrMore( PEER + Group(blockStatementExpr) + Optional(NL) )) + UNDENT)
-    else:
-        smExpr = Group( Optional(NL) +
-            (OneOrMore( PEER + Group(blockStatementExpr) + Optional(NL) )) )
-    blockStatementExpr.ignore(_bslash + LineEnd())
-    return smExpr.setName('indented block')
-
-alphas8bit = srange(r"[\0xc0-\0xd6\0xd8-\0xf6\0xf8-\0xff]")
-punc8bit = srange(r"[\0xa1-\0xbf\0xd7\0xf7]")
-
-anyOpenTag,anyCloseTag = makeHTMLTags(Word(alphas,alphanums+"_:").setName('any tag'))
-_htmlEntityMap = dict(zip("gt lt amp nbsp quot apos".split(),'><& "\''))
-commonHTMLEntity = Regex('&(?P<entity>' + '|'.join(_htmlEntityMap.keys()) +");").setName("common HTML entity")
-def replaceHTMLEntity(t):
-    """Helper parser action to replace common HTML entities with their special characters"""
-    return _htmlEntityMap.get(t.entity)
-
-# it's easy to get these comment structures wrong - they're very common, so may as well make them available
-cStyleComment = Combine(Regex(r"/\*(?:[^*]|\*(?!/))*") + '*/').setName("C style comment")
-"Comment of the form ``/* ... */``"
-
-htmlComment = Regex(r"<!--[\s\S]*?-->").setName("HTML comment")
-"Comment of the form ``<!-- ... -->``"
-
-restOfLine = Regex(r".*").leaveWhitespace().setName("rest of line")
-dblSlashComment = Regex(r"//(?:\\\n|[^\n])*").setName("// comment")
-"Comment of the form ``// ... (to end of line)``"
-
-cppStyleComment = Combine(Regex(r"/\*(?:[^*]|\*(?!/))*") + '*/'| dblSlashComment).setName("C++ style comment")
-"Comment of either form :class:`cStyleComment` or :class:`dblSlashComment`"
-
-javaStyleComment = cppStyleComment
-"Same as :class:`cppStyleComment`"
-
-pythonStyleComment = Regex(r"#.*").setName("Python style comment")
-"Comment of the form ``# ... (to end of line)``"
-
-_commasepitem = Combine(OneOrMore(Word(printables, excludeChars=',') +
-                                  Optional( Word(" \t") +
-                                            ~Literal(",") + ~LineEnd() ) ) ).streamline().setName("commaItem")
-commaSeparatedList = delimitedList( Optional( quotedString.copy() | _commasepitem, default="") ).setName("commaSeparatedList")
-"""(Deprecated) Predefined expression of 1 or more printable words or
-quoted strings, separated by commas.
-
-This expression is deprecated in favor of :class:`pyparsing_common.comma_separated_list`.
-"""
-
-# some other useful expressions - using lower-case class name since we are really using this as a namespace
-class pyparsing_common:
-    """Here are some common low-level expressions that may be useful in
-    jump-starting parser development:
-
-     - numeric forms (:class:`integers<integer>`, :class:`reals<real>`,
-       :class:`scientific notation<sci_real>`)
-     - common :class:`programming identifiers<identifier>`
-     - network addresses (:class:`MAC<mac_address>`,
-       :class:`IPv4<ipv4_address>`, :class:`IPv6<ipv6_address>`)
-     - ISO8601 :class:`dates<iso8601_date>` and
-       :class:`datetime<iso8601_datetime>`
-     - :class:`UUID<uuid>`
-     - :class:`comma-separated list<comma_separated_list>`
-
-    Parse actions:
-
-     - :class:`convertToInteger`
-     - :class:`convertToFloat`
-     - :class:`convertToDate`
-     - :class:`convertToDatetime`
-     - :class:`stripHTMLTags`
-     - :class:`upcaseTokens`
-     - :class:`downcaseTokens`
-
-    Example::
-
-        pyparsing_common.number.runTests('''
-            # any int or real number, returned as the appropriate type
-            100
-            -100
-            +100
-            3.14159
-            6.02e23
-            1e-12
-            ''')
-
-        pyparsing_common.fnumber.runTests('''
-            # any int or real number, returned as float
-            100
-            -100
-            +100
-            3.14159
-            6.02e23
-            1e-12
-            ''')
-
-        pyparsing_common.hex_integer.runTests('''
-            # hex numbers
-            100
-            FF
-            ''')
-
-        pyparsing_common.fraction.runTests('''
-            # fractions
-            1/2
-            -3/4
-            ''')
-
-        pyparsing_common.mixed_integer.runTests('''
-            # mixed fractions
-            1
-            1/2
-            -3/4
-            1-3/4
-            ''')
-
-        import uuid
-        pyparsing_common.uuid.setParseAction(tokenMap(uuid.UUID))
-        pyparsing_common.uuid.runTests('''
-            # uuid
-            12345678-1234-5678-1234-567812345678
-            ''')
-
-    prints::
-
-        # any int or real number, returned as the appropriate type
-        100
-        [100]
-
-        -100
-        [-100]
-
-        +100
-        [100]
-
-        3.14159
-        [3.14159]
-
-        6.02e23
-        [6.02e+23]
-
-        1e-12
-        [1e-12]
-
-        # any int or real number, returned as float
-        100
-        [100.0]
-
-        -100
-        [-100.0]
-
-        +100
-        [100.0]
-
-        3.14159
-        [3.14159]
-
-        6.02e23
-        [6.02e+23]
-
-        1e-12
-        [1e-12]
-
-        # hex numbers
-        100
-        [256]
-
-        FF
-        [255]
-
-        # fractions
-        1/2
-        [0.5]
-
-        -3/4
-        [-0.75]
-
-        # mixed fractions
-        1
-        [1]
-
-        1/2
-        [0.5]
-
-        -3/4
-        [-0.75]
-
-        1-3/4
-        [1.75]
-
-        # uuid
-        12345678-1234-5678-1234-567812345678
-        [UUID('12345678-1234-5678-1234-567812345678')]
-    """
-
-    convertToInteger = tokenMap(int)
-    """
-    Parse action for converting parsed integers to Python int
-    """
-
-    convertToFloat = tokenMap(float)
-    """
-    Parse action for converting parsed numbers to Python float
-    """
-
-    integer = Word(nums).setName("integer").setParseAction(convertToInteger)
-    """expression that parses an unsigned integer, returns an int"""
-
-    hex_integer = Word(hexnums).setName("hex integer").setParseAction(tokenMap(int,16))
-    """expression that parses a hexadecimal integer, returns an int"""
-
-    signed_integer = Regex(r'[+-]?\d+').setName("signed integer").setParseAction(convertToInteger)
-    """expression that parses an integer with optional leading sign, returns an int"""
-
-    fraction = (signed_integer().setParseAction(convertToFloat) + '/' + signed_integer().setParseAction(convertToFloat)).setName("fraction")
-    """fractional expression of an integer divided by an integer, returns a float"""
-    fraction.addParseAction(lambda t: t[0]/t[-1])
-
-    mixed_integer = (fraction | signed_integer + Optional(Optional('-').suppress() + fraction)).setName("fraction or mixed integer-fraction")
-    """mixed integer of the form 'integer - fraction', with optional leading integer, returns float"""
-    mixed_integer.addParseAction(sum)
-
-    real = Regex(r'[+-]?\d+\.\d*').setName("real number").setParseAction(convertToFloat)
-    """expression that parses a floating point number and returns a float"""
-
-    sci_real = Regex(r'[+-]?\d+([eE][+-]?\d+|\.\d*([eE][+-]?\d+)?)').setName("real number with scientific notation").setParseAction(convertToFloat)
-    """expression that parses a floating point number with optional
-    scientific notation and returns a float"""
-
-    # streamlining this expression makes the docs nicer-looking
-    number = (sci_real | real | signed_integer).streamline()
-    """any numeric expression, returns the corresponding Python type"""
-
-    fnumber = Regex(r'[+-]?\d+\.?\d*([eE][+-]?\d+)?').setName("fnumber").setParseAction(convertToFloat)
-    """any int or real number, returned as float"""
-
-    identifier = Word(alphas+'_', alphanums+'_').setName("identifier")
-    """typical code identifier (leading alpha or '_', followed by 0 or more alphas, nums, or '_')"""
-
-    ipv4_address = Regex(r'(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})(\.(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})){3}').setName("IPv4 address")
-    "IPv4 address (``0.0.0.0 - 255.255.255.255``)"
-
-    _ipv6_part = Regex(r'[0-9a-fA-F]{1,4}').setName("hex_integer")
-    _full_ipv6_address = (_ipv6_part + (':' + _ipv6_part)*7).setName("full IPv6 address")
-    _short_ipv6_address = (Optional(_ipv6_part + (':' + _ipv6_part)*(0,6)) + "::" + Optional(_ipv6_part + (':' + _ipv6_part)*(0,6))).setName("short IPv6 address")
-    _short_ipv6_address.addCondition(lambda t: sum(1 for tt in t if pyparsing_common._ipv6_part.matches(tt)) < 8)
-    _mixed_ipv6_address = ("::ffff:" + ipv4_address).setName("mixed IPv6 address")
-    ipv6_address = Combine((_full_ipv6_address | _mixed_ipv6_address | _short_ipv6_address).setName("IPv6 address")).setName("IPv6 address")
-    "IPv6 address (long, short, or mixed form)"
-
-    mac_address = Regex(r'[0-9a-fA-F]{2}([:.-])[0-9a-fA-F]{2}(?:\1[0-9a-fA-F]{2}){4}').setName("MAC address")
-    "MAC address xx:xx:xx:xx:xx (may also have '-' or '.' delimiters)"
-
-    @staticmethod
-    def convertToDate(fmt="%Y-%m-%d"):
-        """
-        Helper to create a parse action for converting parsed date string to Python datetime.date
-
-        Params -
-         - fmt - format to be passed to datetime.strptime (default= ``"%Y-%m-%d"``)
-
-        Example::
-
-            date_expr = pyparsing_common.iso8601_date.copy()
-            date_expr.setParseAction(pyparsing_common.convertToDate())
-            print(date_expr.parseString("1999-12-31"))
-
-        prints::
-
-            [datetime.date(1999, 12, 31)]
-        """
-        def cvt_fn(s,l,t):
-            try:
-                return datetime.strptime(t[0], fmt).date()
-            except ValueError as ve:
-                raise ParseException(s, l, str(ve))
-        return cvt_fn
-
-    @staticmethod
-    def convertToDatetime(fmt="%Y-%m-%dT%H:%M:%S.%f"):
-        """Helper to create a parse action for converting parsed
-        datetime string to Python datetime.datetime
-
-        Params -
-         - fmt - format to be passed to datetime.strptime (default= ``"%Y-%m-%dT%H:%M:%S.%f"``)
-
-        Example::
-
-            dt_expr = pyparsing_common.iso8601_datetime.copy()
-            dt_expr.setParseAction(pyparsing_common.convertToDatetime())
-            print(dt_expr.parseString("1999-12-31T23:59:59.999"))
-
-        prints::
-
-            [datetime.datetime(1999, 12, 31, 23, 59, 59, 999000)]
-        """
-        def cvt_fn(s,l,t):
-            try:
-                return datetime.strptime(t[0], fmt)
-            except ValueError as ve:
-                raise ParseException(s, l, str(ve))
-        return cvt_fn
-
-    iso8601_date = Regex(r'(?P<year>\d{4})(?:-(?P<month>\d\d)(?:-(?P<day>\d\d))?)?').setName("ISO8601 date")
-    "ISO8601 date (``yyyy-mm-dd``)"
-
-    iso8601_datetime = Regex(r'(?P<year>\d{4})-(?P<month>\d\d)-(?P<day>\d\d)[T ](?P<hour>\d\d):(?P<minute>\d\d)(:(?P<second>\d\d(\.\d*)?)?)?(?P<tz>Z|[+-]\d\d:?\d\d)?').setName("ISO8601 datetime")
-    "ISO8601 datetime (``yyyy-mm-ddThh:mm:ss.s(Z|+-00:00)``) - trailing seconds, milliseconds, and timezone optional; accepts separating ``'T'`` or ``' '``"
-
-    uuid = Regex(r'[0-9a-fA-F]{8}(-[0-9a-fA-F]{4}){3}-[0-9a-fA-F]{12}').setName("UUID")
-    "UUID (``xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx``)"
-
-    _html_stripper = anyOpenTag.suppress() | anyCloseTag.suppress()
-    @staticmethod
-    def stripHTMLTags(s, l, tokens):
-        """Parse action to remove HTML tags from web page HTML source
-
-        Example::
-
-            # strip HTML links from normal text
-            text = '<td>More info at the <a href="https://github.com/pyparsing/pyparsing/wiki">pyparsing</a> wiki page</td>'
-            td,td_end = makeHTMLTags("TD")
-            table_text = td + SkipTo(td_end).setParseAction(pyparsing_common.stripHTMLTags)("body") + td_end
-            print(table_text.parseString(text).body)
-
-        Prints::
-
-            More info at the pyparsing wiki page
-        """
-        return pyparsing_common._html_stripper.transformString(tokens[0])
-
-    _commasepitem = Combine(OneOrMore(~Literal(",") + ~LineEnd() + Word(printables, excludeChars=',')
-                                        + Optional( White(" \t") ) ) ).streamline().setName("commaItem")
-    comma_separated_list = delimitedList( Optional( quotedString.copy() | _commasepitem, default="") ).setName("comma separated list")
-    """Predefined expression of 1 or more printable words or quoted strings, separated by commas."""
-
-    upcaseTokens = staticmethod(tokenMap(lambda t: _ustr(t).upper()))
-    """Parse action to convert tokens to upper case."""
-
-    downcaseTokens = staticmethod(tokenMap(lambda t: _ustr(t).lower()))
-    """Parse action to convert tokens to lower case."""
-
-
-class _lazyclassproperty(object):
-    def __init__(self, fn):
-        self.fn = fn
-        self.__doc__ = fn.__doc__
-        self.__name__ = fn.__name__
-
-    def __get__(self, obj, cls):
-        if cls is None:
-            cls = type(obj)
-        if not hasattr(cls, '_intern') or any(cls._intern is getattr(superclass, '_intern', []) for superclass in cls.__mro__[1:]):
-            cls._intern = {}
-        attrname = self.fn.__name__
-        if attrname not in cls._intern:
-            cls._intern[attrname] = self.fn(cls)
-        return cls._intern[attrname]
-
-
-class unicode_set(object):
-    """
-    A set of Unicode characters, for language-specific strings for
-    ``alphas``, ``nums``, ``alphanums``, and ``printables``.
-    A unicode_set is defined by a list of ranges in the Unicode character
-    set, in a class attribute ``_ranges``, such as::
-
-        _ranges = [(0x0020, 0x007e), (0x00a0, 0x00ff),]
-
-    A unicode set can also be defined using multiple inheritance of other unicode sets::
-
-        class CJK(Chinese, Japanese, Korean):
-            pass
-    """
-    _ranges = []
-
-    @classmethod
-    def _get_chars_for_ranges(cls):
-        ret = []
-        for cc in cls.__mro__:
-            if cc is unicode_set:
-                break
-            for rr in cc._ranges:
-                ret.extend(range(rr[0], rr[-1]+1))
-        return [unichr(c) for c in sorted(set(ret))]
-
-    @_lazyclassproperty
-    def printables(cls):
-        "all non-whitespace characters in this range"
-        return u''.join(filterfalse(unicode.isspace, cls._get_chars_for_ranges()))
-
-    @_lazyclassproperty
-    def alphas(cls):
-        "all alphabetic characters in this range"
-        return u''.join(filter(unicode.isalpha, cls._get_chars_for_ranges()))
-
-    @_lazyclassproperty
-    def nums(cls):
-        "all numeric digit characters in this range"
-        return u''.join(filter(unicode.isdigit, cls._get_chars_for_ranges()))
-
-    @_lazyclassproperty
-    def alphanums(cls):
-        "all alphanumeric characters in this range"
-        return cls.alphas + cls.nums
-
-
-class pyparsing_unicode(unicode_set):
-    """
-    A namespace class for defining common language unicode_sets.
-    """
-    _ranges = [(32, sys.maxunicode)]
-
-    class Latin1(unicode_set):
-        "Unicode set for Latin-1 Unicode Character Range"
-        _ranges = [(0x0020, 0x007e), (0x00a0, 0x00ff),]
-
-    class LatinA(unicode_set):
-        "Unicode set for Latin-A Unicode Character Range"
-        _ranges = [(0x0100, 0x017f),]
-
-    class LatinB(unicode_set):
-        "Unicode set for Latin-B Unicode Character Range"
-        _ranges = [(0x0180, 0x024f),]
-
-    class Greek(unicode_set):
-        "Unicode set for Greek Unicode Character Ranges"
-        _ranges = [
-            (0x0370, 0x03ff), (0x1f00, 0x1f15), (0x1f18, 0x1f1d), (0x1f20, 0x1f45), (0x1f48, 0x1f4d),
-            (0x1f50, 0x1f57), (0x1f59,), (0x1f5b,), (0x1f5d,), (0x1f5f, 0x1f7d), (0x1f80, 0x1fb4), (0x1fb6, 0x1fc4),
-            (0x1fc6, 0x1fd3), (0x1fd6, 0x1fdb), (0x1fdd, 0x1fef), (0x1ff2, 0x1ff4), (0x1ff6, 0x1ffe),
-        ]
-
-    class Cyrillic(unicode_set):
-        "Unicode set for Cyrillic Unicode Character Range"
-        _ranges = [(0x0400, 0x04ff)]
-
-    class Chinese(unicode_set):
-        "Unicode set for Chinese Unicode Character Range"
-        _ranges = [(0x4e00, 0x9fff), (0x3000, 0x303f), ]
-
-    class Japanese(unicode_set):
-        "Unicode set for Japanese Unicode Character Range, combining Kanji, Hiragana, and Katakana ranges"
-        _ranges = [ ]
-
-        class Kanji(unicode_set):
-            "Unicode set for Kanji Unicode Character Range"
-            _ranges = [(0x4E00, 0x9Fbf), (0x3000, 0x303f), ]
-
-        class Hiragana(unicode_set):
-            "Unicode set for Hiragana Unicode Character Range"
-            _ranges = [(0x3040, 0x309f), ]
-
-        class Katakana(unicode_set):
-            "Unicode set for Katakana  Unicode Character Range"
-            _ranges = [(0x30a0, 0x30ff), ]
-
-    class Korean(unicode_set):
-        "Unicode set for Korean Unicode Character Range"
-        _ranges = [(0xac00, 0xd7af), (0x1100, 0x11ff), (0x3130, 0x318f), (0xa960, 0xa97f), (0xd7b0, 0xd7ff), (0x3000, 0x303f), ]
-
-    class CJK(Chinese, Japanese, Korean):
-        "Unicode set for combined Chinese, Japanese, and Korean (CJK) Unicode Character Range"
-        pass
-
-    class Thai(unicode_set):
-        "Unicode set for Thai Unicode Character Range"
-        _ranges = [(0x0e01, 0x0e3a), (0x0e3f, 0x0e5b), ]
-
-    class Arabic(unicode_set):
-        "Unicode set for Arabic Unicode Character Range"
-        _ranges = [(0x0600, 0x061b), (0x061e, 0x06ff), (0x0700, 0x077f), ]
-
-    class Hebrew(unicode_set):
-        "Unicode set for Hebrew Unicode Character Range"
-        _ranges = [(0x0590, 0x05ff), ]
-
-    class Devanagari(unicode_set):
-        "Unicode set for Devanagari Unicode Character Range"
-        _ranges = [(0x0900, 0x097f), (0xa8e0, 0xa8ff)]
-
-pyparsing_unicode.Japanese._ranges = (pyparsing_unicode.Japanese.Kanji._ranges
-                                      + pyparsing_unicode.Japanese.Hiragana._ranges
-                                      + pyparsing_unicode.Japanese.Katakana._ranges)
-
-# define ranges in language character sets
-if PY_3:
-    setattr(pyparsing_unicode, "العربية", pyparsing_unicode.Arabic)
-    setattr(pyparsing_unicode, "中文", pyparsing_unicode.Chinese)
-    setattr(pyparsing_unicode, "кириллица", pyparsing_unicode.Cyrillic)
-    setattr(pyparsing_unicode, "Ελληνικά", pyparsing_unicode.Greek)
-    setattr(pyparsing_unicode, "עִברִית", pyparsing_unicode.Hebrew)
-    setattr(pyparsing_unicode, "日本語", pyparsing_unicode.Japanese)
-    setattr(pyparsing_unicode.Japanese, "漢字", pyparsing_unicode.Japanese.Kanji)
-    setattr(pyparsing_unicode.Japanese, "カタカナ", pyparsing_unicode.Japanese.Katakana)
-    setattr(pyparsing_unicode.Japanese, "ひらがな", pyparsing_unicode.Japanese.Hiragana)
-    setattr(pyparsing_unicode, "한국어", pyparsing_unicode.Korean)
-    setattr(pyparsing_unicode, "ไทย", pyparsing_unicode.Thai)
-    setattr(pyparsing_unicode, "देवनागरी", pyparsing_unicode.Devanagari)
-
-
-if __name__ == "__main__":
-
-    selectToken    = CaselessLiteral("select")
-    fromToken      = CaselessLiteral("from")
-
-    ident          = Word(alphas, alphanums + "_$")
-
-    columnName     = delimitedList(ident, ".", combine=True).setParseAction(upcaseTokens)
-    columnNameList = Group(delimitedList(columnName)).setName("columns")
-    columnSpec     = ('*' | columnNameList)
-
-    tableName      = delimitedList(ident, ".", combine=True).setParseAction(upcaseTokens)
-    tableNameList  = Group(delimitedList(tableName)).setName("tables")
-
-    simpleSQL      = selectToken("command") + columnSpec("columns") + fromToken + tableNameList("tables")
-
-    # demo runTests method, including embedded comments in test string
-    simpleSQL.runTests("""
-        # '*' as column list and dotted table name
-        select * from SYS.XYZZY
-
-        # caseless match on "SELECT", and casts back to "select"
-        SELECT * from XYZZY, ABC
-
-        # list of column names, and mixed case SELECT keyword
-        Select AA,BB,CC from Sys.dual
-
-        # multiple tables
-        Select A, B, C from Sys.dual, Table2
-
-        # invalid SELECT keyword - should fail
-        Xelect A, B, C from Sys.dual
-
-        # incomplete command - should fail
-        Select
-
-        # invalid column name - should fail
-        Select ^^^ frox Sys.dual
-
-        """)
-
-    pyparsing_common.number.runTests("""
-        100
-        -100
-        +100
-        3.14159
-        6.02e23
-        1e-12
-        """)
-
-    # any int or real number, returned as float
-    pyparsing_common.fnumber.runTests("""
-        100
-        -100
-        +100
-        3.14159
-        6.02e23
-        1e-12
-        """)
-
-    pyparsing_common.hex_integer.runTests("""
-        100
-        FF
-        """)
-
-    import uuid
-    pyparsing_common.uuid.setParseAction(tokenMap(uuid.UUID))
-    pyparsing_common.uuid.runTests("""
-        12345678-1234-5678-1234-567812345678
-        """)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pytoml/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pytoml/__init__.py
deleted file mode 100644
index 8ed060f..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pytoml/__init__.py
+++ /dev/null
@@ -1,4 +0,0 @@
-from .core import TomlError
-from .parser import load, loads
-from .test import translate_to_test
-from .writer import dump, dumps
\ No newline at end of file
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pytoml/core.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pytoml/core.py
deleted file mode 100644
index c182734..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pytoml/core.py
+++ /dev/null
@@ -1,13 +0,0 @@
-class TomlError(RuntimeError):
-    def __init__(self, message, line, col, filename):
-        RuntimeError.__init__(self, message, line, col, filename)
-        self.message = message
-        self.line = line
-        self.col = col
-        self.filename = filename
-
-    def __str__(self):
-        return '{}({}, {}): {}'.format(self.filename, self.line, self.col, self.message)
-
-    def __repr__(self):
-        return 'TomlError({!r}, {!r}, {!r}, {!r})'.format(self.message, self.line, self.col, self.filename)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pytoml/parser.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pytoml/parser.py
deleted file mode 100644
index 3493aa6..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pytoml/parser.py
+++ /dev/null
@@ -1,341 +0,0 @@
-import string, re, sys, datetime
-from .core import TomlError
-from .utils import rfc3339_re, parse_rfc3339_re
-
-if sys.version_info[0] == 2:
-    _chr = unichr
-else:
-    _chr = chr
-
-def load(fin, translate=lambda t, x, v: v, object_pairs_hook=dict):
-    return loads(fin.read(), translate=translate, object_pairs_hook=object_pairs_hook, filename=getattr(fin, 'name', repr(fin)))
-
-def loads(s, filename='<string>', translate=lambda t, x, v: v, object_pairs_hook=dict):
-    if isinstance(s, bytes):
-        s = s.decode('utf-8')
-
-    s = s.replace('\r\n', '\n')
-
-    root = object_pairs_hook()
-    tables = object_pairs_hook()
-    scope = root
-
-    src = _Source(s, filename=filename)
-    ast = _p_toml(src, object_pairs_hook=object_pairs_hook)
-
-    def error(msg):
-        raise TomlError(msg, pos[0], pos[1], filename)
-
-    def process_value(v, object_pairs_hook):
-        kind, text, value, pos = v
-        if kind == 'str' and value.startswith('\n'):
-            value = value[1:]
-        if kind == 'array':
-            if value and any(k != value[0][0] for k, t, v, p in value[1:]):
-                error('array-type-mismatch')
-            value = [process_value(item, object_pairs_hook=object_pairs_hook) for item in value]
-        elif kind == 'table':
-            value = object_pairs_hook([(k, process_value(value[k], object_pairs_hook=object_pairs_hook)) for k in value])
-        return translate(kind, text, value)
-
-    for kind, value, pos in ast:
-        if kind == 'kv':
-            k, v = value
-            if k in scope:
-                error('duplicate_keys. Key "{0}" was used more than once.'.format(k))
-            scope[k] = process_value(v, object_pairs_hook=object_pairs_hook)
-        else:
-            is_table_array = (kind == 'table_array')
-            cur = tables
-            for name in value[:-1]:
-                if isinstance(cur.get(name), list):
-                    d, cur = cur[name][-1]
-                else:
-                    d, cur = cur.setdefault(name, (None, object_pairs_hook()))
-
-            scope = object_pairs_hook()
-            name = value[-1]
-            if name not in cur:
-                if is_table_array:
-                    cur[name] = [(scope, object_pairs_hook())]
-                else:
-                    cur[name] = (scope, object_pairs_hook())
-            elif isinstance(cur[name], list):
-                if not is_table_array:
-                    error('table_type_mismatch')
-                cur[name].append((scope, object_pairs_hook()))
-            else:
-                if is_table_array:
-                    error('table_type_mismatch')
-                old_scope, next_table = cur[name]
-                if old_scope is not None:
-                    error('duplicate_tables')
-                cur[name] = (scope, next_table)
-
-    def merge_tables(scope, tables):
-        if scope is None:
-            scope = object_pairs_hook()
-        for k in tables:
-            if k in scope:
-                error('key_table_conflict')
-            v = tables[k]
-            if isinstance(v, list):
-                scope[k] = [merge_tables(sc, tbl) for sc, tbl in v]
-            else:
-                scope[k] = merge_tables(v[0], v[1])
-        return scope
-
-    return merge_tables(root, tables)
-
-class _Source:
-    def __init__(self, s, filename=None):
-        self.s = s
-        self._pos = (1, 1)
-        self._last = None
-        self._filename = filename
-        self.backtrack_stack = []
-
-    def last(self):
-        return self._last
-
-    def pos(self):
-        return self._pos
-
-    def fail(self):
-        return self._expect(None)
-
-    def consume_dot(self):
-        if self.s:
-            self._last = self.s[0]
-            self.s = self[1:]
-            self._advance(self._last)
-            return self._last
-        return None
-
-    def expect_dot(self):
-        return self._expect(self.consume_dot())
-
-    def consume_eof(self):
-        if not self.s:
-            self._last = ''
-            return True
-        return False
-
-    def expect_eof(self):
-        return self._expect(self.consume_eof())
-
-    def consume(self, s):
-        if self.s.startswith(s):
-            self.s = self.s[len(s):]
-            self._last = s
-            self._advance(s)
-            return True
-        return False
-
-    def expect(self, s):
-        return self._expect(self.consume(s))
-
-    def consume_re(self, re):
-        m = re.match(self.s)
-        if m:
-            self.s = self.s[len(m.group(0)):]
-            self._last = m
-            self._advance(m.group(0))
-            return m
-        return None
-
-    def expect_re(self, re):
-        return self._expect(self.consume_re(re))
-
-    def __enter__(self):
-        self.backtrack_stack.append((self.s, self._pos))
-
-    def __exit__(self, type, value, traceback):
-        if type is None:
-            self.backtrack_stack.pop()
-        else:
-            self.s, self._pos = self.backtrack_stack.pop()
-        return type == TomlError
-
-    def commit(self):
-        self.backtrack_stack[-1] = (self.s, self._pos)
-
-    def _expect(self, r):
-        if not r:
-            raise TomlError('msg', self._pos[0], self._pos[1], self._filename)
-        return r
-
-    def _advance(self, s):
-        suffix_pos = s.rfind('\n')
-        if suffix_pos == -1:
-            self._pos = (self._pos[0], self._pos[1] + len(s))
-        else:
-            self._pos = (self._pos[0] + s.count('\n'), len(s) - suffix_pos)
-
-_ews_re = re.compile(r'(?:[ \t]|#[^\n]*\n|#[^\n]*\Z|\n)*')
-def _p_ews(s):
-    s.expect_re(_ews_re)
-
-_ws_re = re.compile(r'[ \t]*')
-def _p_ws(s):
-    s.expect_re(_ws_re)
-
-_escapes = { 'b': '\b', 'n': '\n', 'r': '\r', 't': '\t', '"': '"',
-    '\\': '\\', 'f': '\f' }
-
-_basicstr_re = re.compile(r'[^"\\\000-\037]*')
-_short_uni_re = re.compile(r'u([0-9a-fA-F]{4})')
-_long_uni_re = re.compile(r'U([0-9a-fA-F]{8})')
-_escapes_re = re.compile(r'[btnfr\"\\]')
-_newline_esc_re = re.compile('\n[ \t\n]*')
-def _p_basicstr_content(s, content=_basicstr_re):
-    res = []
-    while True:
-        res.append(s.expect_re(content).group(0))
-        if not s.consume('\\'):
-            break
-        if s.consume_re(_newline_esc_re):
-            pass
-        elif s.consume_re(_short_uni_re) or s.consume_re(_long_uni_re):
-            v = int(s.last().group(1), 16)
-            if 0xd800 <= v < 0xe000:
-                s.fail()
-            res.append(_chr(v))
-        else:
-            s.expect_re(_escapes_re)
-            res.append(_escapes[s.last().group(0)])
-    return ''.join(res)
-
-_key_re = re.compile(r'[0-9a-zA-Z-_]+')
-def _p_key(s):
-    with s:
-        s.expect('"')
-        r = _p_basicstr_content(s, _basicstr_re)
-        s.expect('"')
-        return r
-    if s.consume('\''):
-        if s.consume('\'\''):
-            r = s.expect_re(_litstr_ml_re).group(0)
-            s.expect('\'\'\'')
-        else:
-            r = s.expect_re(_litstr_re).group(0)
-            s.expect('\'')
-        return r
-    return s.expect_re(_key_re).group(0)
-
-_float_re = re.compile(r'[+-]?(?:0|[1-9](?:_?\d)*)(?:\.\d(?:_?\d)*)?(?:[eE][+-]?(?:\d(?:_?\d)*))?')
-
-_basicstr_ml_re = re.compile(r'(?:""?(?!")|[^"\\\000-\011\013-\037])*')
-_litstr_re = re.compile(r"[^'\000\010\012-\037]*")
-_litstr_ml_re = re.compile(r"(?:(?:|'|'')(?:[^'\000-\010\013-\037]))*")
-def _p_value(s, object_pairs_hook):
-    pos = s.pos()
-
-    if s.consume('true'):
-        return 'bool', s.last(), True, pos
-    if s.consume('false'):
-        return 'bool', s.last(), False, pos
-
-    if s.consume('"'):
-        if s.consume('""'):
-            r = _p_basicstr_content(s, _basicstr_ml_re)
-            s.expect('"""')
-        else:
-            r = _p_basicstr_content(s, _basicstr_re)
-            s.expect('"')
-        return 'str', r, r, pos
-
-    if s.consume('\''):
-        if s.consume('\'\''):
-            r = s.expect_re(_litstr_ml_re).group(0)
-            s.expect('\'\'\'')
-        else:
-            r = s.expect_re(_litstr_re).group(0)
-            s.expect('\'')
-        return 'str', r, r, pos
-
-    if s.consume_re(rfc3339_re):
-        m = s.last()
-        return 'datetime', m.group(0), parse_rfc3339_re(m), pos
-
-    if s.consume_re(_float_re):
-        m = s.last().group(0)
-        r = m.replace('_','')
-        if '.' in m or 'e' in m or 'E' in m:
-            return 'float', m, float(r), pos
-        else:
-            return 'int', m, int(r, 10), pos
-
-    if s.consume('['):
-        items = []
-        with s:
-            while True:
-                _p_ews(s)
-                items.append(_p_value(s, object_pairs_hook=object_pairs_hook))
-                s.commit()
-                _p_ews(s)
-                s.expect(',')
-                s.commit()
-        _p_ews(s)
-        s.expect(']')
-        return 'array', None, items, pos
-
-    if s.consume('{'):
-        _p_ws(s)
-        items = object_pairs_hook()
-        if not s.consume('}'):
-            k = _p_key(s)
-            _p_ws(s)
-            s.expect('=')
-            _p_ws(s)
-            items[k] = _p_value(s, object_pairs_hook=object_pairs_hook)
-            _p_ws(s)
-            while s.consume(','):
-                _p_ws(s)
-                k = _p_key(s)
-                _p_ws(s)
-                s.expect('=')
-                _p_ws(s)
-                items[k] = _p_value(s, object_pairs_hook=object_pairs_hook)
-                _p_ws(s)
-            s.expect('}')
-        return 'table', None, items, pos
-
-    s.fail()
-
-def _p_stmt(s, object_pairs_hook):
-    pos = s.pos()
-    if s.consume(   '['):
-        is_array = s.consume('[')
-        _p_ws(s)
-        keys = [_p_key(s)]
-        _p_ws(s)
-        while s.consume('.'):
-            _p_ws(s)
-            keys.append(_p_key(s))
-            _p_ws(s)
-        s.expect(']')
-        if is_array:
-            s.expect(']')
-        return 'table_array' if is_array else 'table', keys, pos
-
-    key = _p_key(s)
-    _p_ws(s)
-    s.expect('=')
-    _p_ws(s)
-    value = _p_value(s, object_pairs_hook=object_pairs_hook)
-    return 'kv', (key, value), pos
-
-_stmtsep_re = re.compile(r'(?:[ \t]*(?:#[^\n]*)?\n)+[ \t]*')
-def _p_toml(s, object_pairs_hook):
-    stmts = []
-    _p_ews(s)
-    with s:
-        stmts.append(_p_stmt(s, object_pairs_hook=object_pairs_hook))
-        while True:
-            s.commit()
-            s.expect_re(_stmtsep_re)
-            stmts.append(_p_stmt(s, object_pairs_hook=object_pairs_hook))
-    _p_ews(s)
-    s.expect_eof()
-    return stmts
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pytoml/test.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pytoml/test.py
deleted file mode 100644
index ec8abfc..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pytoml/test.py
+++ /dev/null
@@ -1,30 +0,0 @@
-import datetime
-from .utils import format_rfc3339
-
-try:
-    _string_types = (str, unicode)
-    _int_types = (int, long)
-except NameError:
-    _string_types = str
-    _int_types = int
-
-def translate_to_test(v):
-    if isinstance(v, dict):
-        return { k: translate_to_test(v) for k, v in v.items() }
-    if isinstance(v, list):
-        a = [translate_to_test(x) for x in v]
-        if v and isinstance(v[0], dict):
-            return a
-        else:
-            return {'type': 'array', 'value': a}
-    if isinstance(v, datetime.datetime):
-        return {'type': 'datetime', 'value': format_rfc3339(v)}
-    if isinstance(v, bool):
-        return {'type': 'bool', 'value': 'true' if v else 'false'}
-    if isinstance(v, _int_types):
-        return {'type': 'integer', 'value': str(v)}
-    if isinstance(v, float):
-        return {'type': 'float', 'value': '{:.17}'.format(v)}
-    if isinstance(v, _string_types):
-        return {'type': 'string', 'value': v}
-    raise RuntimeError('unexpected value: {!r}'.format(v))
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pytoml/utils.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pytoml/utils.py
deleted file mode 100644
index 636a680..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pytoml/utils.py
+++ /dev/null
@@ -1,67 +0,0 @@
-import datetime
-import re
-
-rfc3339_re = re.compile(r'(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2})(\.\d+)?(?:Z|([+-]\d{2}):(\d{2}))')
-
-def parse_rfc3339(v):
-    m = rfc3339_re.match(v)
-    if not m or m.group(0) != v:
-        return None
-    return parse_rfc3339_re(m)
-
-def parse_rfc3339_re(m):
-    r = map(int, m.groups()[:6])
-    if m.group(7):
-        micro = float(m.group(7))
-    else:
-        micro = 0
-
-    if m.group(8):
-        g = int(m.group(8), 10) * 60 + int(m.group(9), 10)
-        tz = _TimeZone(datetime.timedelta(0, g * 60))
-    else:
-        tz = _TimeZone(datetime.timedelta(0, 0))
-
-    y, m, d, H, M, S = r
-    return datetime.datetime(y, m, d, H, M, S, int(micro * 1000000), tz)
-
-
-def format_rfc3339(v):
-    offs = v.utcoffset()
-    offs = int(offs.total_seconds()) // 60 if offs is not None else 0
-
-    if offs == 0:
-        suffix = 'Z'
-    else:
-        if offs > 0:
-            suffix = '+'
-        else:
-            suffix = '-'
-            offs = -offs
-        suffix = '{0}{1:02}:{2:02}'.format(suffix, offs // 60, offs % 60)
-
-    if v.microsecond:
-        return v.strftime('%Y-%m-%dT%H:%M:%S.%f') + suffix
-    else:
-        return v.strftime('%Y-%m-%dT%H:%M:%S') + suffix
-
-class _TimeZone(datetime.tzinfo):
-    def __init__(self, offset):
-        self._offset = offset
-
-    def utcoffset(self, dt):
-        return self._offset
-
-    def dst(self, dt):
-        return None
-
-    def tzname(self, dt):
-        m = self._offset.total_seconds() // 60
-        if m < 0:
-            res = '-'
-            m = -m
-        else:
-            res = '+'
-        h = m // 60
-        m = m - h * 60
-        return '{}{:.02}{:.02}'.format(res, h, m)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pytoml/writer.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pytoml/writer.py
deleted file mode 100644
index 73b5089..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/pytoml/writer.py
+++ /dev/null
@@ -1,106 +0,0 @@
-from __future__ import unicode_literals
-import io, datetime, math, string, sys
-
-from .utils import format_rfc3339
-
-if sys.version_info[0] == 3:
-    long = int
-    unicode = str
-
-
-def dumps(obj, sort_keys=False):
-    fout = io.StringIO()
-    dump(obj, fout, sort_keys=sort_keys)
-    return fout.getvalue()
-
-
-_escapes = {'\n': 'n', '\r': 'r', '\\': '\\', '\t': 't', '\b': 'b', '\f': 'f', '"': '"'}
-
-
-def _escape_string(s):
-    res = []
-    start = 0
-
-    def flush():
-        if start != i:
-            res.append(s[start:i])
-        return i + 1
-
-    i = 0
-    while i < len(s):
-        c = s[i]
-        if c in '"\\\n\r\t\b\f':
-            start = flush()
-            res.append('\\' + _escapes[c])
-        elif ord(c) < 0x20:
-            start = flush()
-            res.append('\\u%04x' % ord(c))
-        i += 1
-
-    flush()
-    return '"' + ''.join(res) + '"'
-
-
-_key_chars = string.digits + string.ascii_letters + '-_'
-def _escape_id(s):
-    if any(c not in _key_chars for c in s):
-        return _escape_string(s)
-    return s
-
-
-def _format_value(v):
-    if isinstance(v, bool):
-        return 'true' if v else 'false'
-    if isinstance(v, int) or isinstance(v, long):
-        return unicode(v)
-    if isinstance(v, float):
-        if math.isnan(v) or math.isinf(v):
-            raise ValueError("{0} is not a valid TOML value".format(v))
-        else:
-            return repr(v)
-    elif isinstance(v, unicode) or isinstance(v, bytes):
-        return _escape_string(v)
-    elif isinstance(v, datetime.datetime):
-        return format_rfc3339(v)
-    elif isinstance(v, list):
-        return '[{0}]'.format(', '.join(_format_value(obj) for obj in v))
-    elif isinstance(v, dict):
-        return '{{{0}}}'.format(', '.join('{} = {}'.format(_escape_id(k), _format_value(obj)) for k, obj in v.items()))
-    else:
-        raise RuntimeError(v)
-
-
-def dump(obj, fout, sort_keys=False):
-    tables = [((), obj, False)]
-
-    while tables:
-        name, table, is_array = tables.pop()
-        if name:
-            section_name = '.'.join(_escape_id(c) for c in name)
-            if is_array:
-                fout.write('[[{0}]]\n'.format(section_name))
-            else:
-                fout.write('[{0}]\n'.format(section_name))
-
-        table_keys = sorted(table.keys()) if sort_keys else table.keys()
-        new_tables = []
-        has_kv = False
-        for k in table_keys:
-            v = table[k]
-            if isinstance(v, dict):
-                new_tables.append((name + (k,), v, False))
-            elif isinstance(v, list) and v and all(isinstance(o, dict) for o in v):
-                new_tables.extend((name + (k,), d, True) for d in v)
-            elif v is None:
-                # based on mojombo's comment: https://github.com/toml-lang/toml/issues/146#issuecomment-25019344
-                fout.write(
-                    '#{} = null  # To use: uncomment and replace null with value\n'.format(_escape_id(k)))
-                has_kv = True
-            else:
-                fout.write('{0} = {1}\n'.format(_escape_id(k), _format_value(v)))
-                has_kv = True
-
-        tables.extend(reversed(new_tables))
-
-        if (name or has_kv) and tables:
-            fout.write('\n')
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/__init__.py
deleted file mode 100644
index 80c4ce1..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/__init__.py
+++ /dev/null
@@ -1,133 +0,0 @@
-# -*- coding: utf-8 -*-
-
-#   __
-#  /__)  _  _     _   _ _/   _
-# / (   (- (/ (/ (- _)  /  _)
-#          /
-
-"""
-Requests HTTP Library
-~~~~~~~~~~~~~~~~~~~~~
-
-Requests is an HTTP library, written in Python, for human beings. Basic GET
-usage:
-
-   >>> import requests
-   >>> r = requests.get('https://www.python.org')
-   >>> r.status_code
-   200
-   >>> 'Python is a programming language' in r.content
-   True
-
-... or POST:
-
-   >>> payload = dict(key1='value1', key2='value2')
-   >>> r = requests.post('https://httpbin.org/post', data=payload)
-   >>> print(r.text)
-   {
-     ...
-     "form": {
-       "key2": "value2",
-       "key1": "value1"
-     },
-     ...
-   }
-
-The other HTTP methods are supported - see `requests.api`. Full documentation
-is at <http://python-requests.org>.
-
-:copyright: (c) 2017 by Kenneth Reitz.
-:license: Apache 2.0, see LICENSE for more details.
-"""
-
-from pip._vendor import urllib3
-from pip._vendor import chardet
-import warnings
-from .exceptions import RequestsDependencyWarning
-
-
-def check_compatibility(urllib3_version, chardet_version):
-    urllib3_version = urllib3_version.split('.')
-    assert urllib3_version != ['dev']  # Verify urllib3 isn't installed from git.
-
-    # Sometimes, urllib3 only reports its version as 16.1.
-    if len(urllib3_version) == 2:
-        urllib3_version.append('0')
-
-    # Check urllib3 for compatibility.
-    major, minor, patch = urllib3_version  # noqa: F811
-    major, minor, patch = int(major), int(minor), int(patch)
-    # urllib3 >= 1.21.1, <= 1.24
-    assert major == 1
-    assert minor >= 21
-    assert minor <= 24
-
-    # Check chardet for compatibility.
-    major, minor, patch = chardet_version.split('.')[:3]
-    major, minor, patch = int(major), int(minor), int(patch)
-    # chardet >= 3.0.2, < 3.1.0
-    assert major == 3
-    assert minor < 1
-    assert patch >= 2
-
-
-def _check_cryptography(cryptography_version):
-    # cryptography < 1.3.4
-    try:
-        cryptography_version = list(map(int, cryptography_version.split('.')))
-    except ValueError:
-        return
-
-    if cryptography_version < [1, 3, 4]:
-        warning = 'Old version of cryptography ({}) may cause slowdown.'.format(cryptography_version)
-        warnings.warn(warning, RequestsDependencyWarning)
-
-# Check imported dependencies for compatibility.
-try:
-    check_compatibility(urllib3.__version__, chardet.__version__)
-except (AssertionError, ValueError):
-    warnings.warn("urllib3 ({}) or chardet ({}) doesn't match a supported "
-                  "version!".format(urllib3.__version__, chardet.__version__),
-                  RequestsDependencyWarning)
-
-# Attempt to enable urllib3's SNI support, if possible
-from pip._internal.utils.compat import WINDOWS
-if not WINDOWS:
-    try:
-        from pip._vendor.urllib3.contrib import pyopenssl
-        pyopenssl.inject_into_urllib3()
-
-        # Check cryptography version
-        from cryptography import __version__ as cryptography_version
-        _check_cryptography(cryptography_version)
-    except ImportError:
-        pass
-
-# urllib3's DependencyWarnings should be silenced.
-from pip._vendor.urllib3.exceptions import DependencyWarning
-warnings.simplefilter('ignore', DependencyWarning)
-
-from .__version__ import __title__, __description__, __url__, __version__
-from .__version__ import __build__, __author__, __author_email__, __license__
-from .__version__ import __copyright__, __cake__
-
-from . import utils
-from . import packages
-from .models import Request, Response, PreparedRequest
-from .api import request, get, head, post, patch, put, delete, options
-from .sessions import session, Session
-from .status_codes import codes
-from .exceptions import (
-    RequestException, Timeout, URLRequired,
-    TooManyRedirects, HTTPError, ConnectionError,
-    FileModeWarning, ConnectTimeout, ReadTimeout
-)
-
-# Set default logging handler to avoid "No handler found" warnings.
-import logging
-from logging import NullHandler
-
-logging.getLogger(__name__).addHandler(NullHandler())
-
-# FileModeWarnings go off per the default.
-warnings.simplefilter('default', FileModeWarning, append=True)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/__version__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/__version__.py
deleted file mode 100644
index f5b5d03..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/__version__.py
+++ /dev/null
@@ -1,14 +0,0 @@
-# .-. .-. .-. . . .-. .-. .-. .-.
-# |(  |-  |.| | | |-  `-.  |  `-.
-# ' ' `-' `-`.`-' `-' `-'  '  `-'
-
-__title__ = 'requests'
-__description__ = 'Python HTTP for Humans.'
-__url__ = 'http://python-requests.org'
-__version__ = '2.21.0'
-__build__ = 0x022100
-__author__ = 'Kenneth Reitz'
-__author_email__ = 'me@kennethreitz.org'
-__license__ = 'Apache 2.0'
-__copyright__ = 'Copyright 2018 Kenneth Reitz'
-__cake__ = u'\u2728 \U0001f370 \u2728'
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/_internal_utils.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/_internal_utils.py
deleted file mode 100644
index 759d9a5..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/_internal_utils.py
+++ /dev/null
@@ -1,42 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-requests._internal_utils
-~~~~~~~~~~~~~~
-
-Provides utility functions that are consumed internally by Requests
-which depend on extremely few external helpers (such as compat)
-"""
-
-from .compat import is_py2, builtin_str, str
-
-
-def to_native_string(string, encoding='ascii'):
-    """Given a string object, regardless of type, returns a representation of
-    that string in the native string type, encoding and decoding where
-    necessary. This assumes ASCII unless told otherwise.
-    """
-    if isinstance(string, builtin_str):
-        out = string
-    else:
-        if is_py2:
-            out = string.encode(encoding)
-        else:
-            out = string.decode(encoding)
-
-    return out
-
-
-def unicode_is_ascii(u_string):
-    """Determine if unicode string only contains ASCII characters.
-
-    :param str u_string: unicode string to check. Must be unicode
-        and not Python 2 `str`.
-    :rtype: bool
-    """
-    assert isinstance(u_string, str)
-    try:
-        u_string.encode('ascii')
-        return True
-    except UnicodeEncodeError:
-        return False
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/adapters.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/adapters.py
deleted file mode 100644
index c30e7c9..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/adapters.py
+++ /dev/null
@@ -1,533 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-requests.adapters
-~~~~~~~~~~~~~~~~~
-
-This module contains the transport adapters that Requests uses to define
-and maintain connections.
-"""
-
-import os.path
-import socket
-
-from pip._vendor.urllib3.poolmanager import PoolManager, proxy_from_url
-from pip._vendor.urllib3.response import HTTPResponse
-from pip._vendor.urllib3.util import parse_url
-from pip._vendor.urllib3.util import Timeout as TimeoutSauce
-from pip._vendor.urllib3.util.retry import Retry
-from pip._vendor.urllib3.exceptions import ClosedPoolError
-from pip._vendor.urllib3.exceptions import ConnectTimeoutError
-from pip._vendor.urllib3.exceptions import HTTPError as _HTTPError
-from pip._vendor.urllib3.exceptions import MaxRetryError
-from pip._vendor.urllib3.exceptions import NewConnectionError
-from pip._vendor.urllib3.exceptions import ProxyError as _ProxyError
-from pip._vendor.urllib3.exceptions import ProtocolError
-from pip._vendor.urllib3.exceptions import ReadTimeoutError
-from pip._vendor.urllib3.exceptions import SSLError as _SSLError
-from pip._vendor.urllib3.exceptions import ResponseError
-from pip._vendor.urllib3.exceptions import LocationValueError
-
-from .models import Response
-from .compat import urlparse, basestring
-from .utils import (DEFAULT_CA_BUNDLE_PATH, extract_zipped_paths,
-                    get_encoding_from_headers, prepend_scheme_if_needed,
-                    get_auth_from_url, urldefragauth, select_proxy)
-from .structures import CaseInsensitiveDict
-from .cookies import extract_cookies_to_jar
-from .exceptions import (ConnectionError, ConnectTimeout, ReadTimeout, SSLError,
-                         ProxyError, RetryError, InvalidSchema, InvalidProxyURL,
-                         InvalidURL)
-from .auth import _basic_auth_str
-
-try:
-    from pip._vendor.urllib3.contrib.socks import SOCKSProxyManager
-except ImportError:
-    def SOCKSProxyManager(*args, **kwargs):
-        raise InvalidSchema("Missing dependencies for SOCKS support.")
-
-DEFAULT_POOLBLOCK = False
-DEFAULT_POOLSIZE = 10
-DEFAULT_RETRIES = 0
-DEFAULT_POOL_TIMEOUT = None
-
-
-class BaseAdapter(object):
-    """The Base Transport Adapter"""
-
-    def __init__(self):
-        super(BaseAdapter, self).__init__()
-
-    def send(self, request, stream=False, timeout=None, verify=True,
-             cert=None, proxies=None):
-        """Sends PreparedRequest object. Returns Response object.
-
-        :param request: The :class:`PreparedRequest <PreparedRequest>` being sent.
-        :param stream: (optional) Whether to stream the request content.
-        :param timeout: (optional) How long to wait for the server to send
-            data before giving up, as a float, or a :ref:`(connect timeout,
-            read timeout) <timeouts>` tuple.
-        :type timeout: float or tuple
-        :param verify: (optional) Either a boolean, in which case it controls whether we verify
-            the server's TLS certificate, or a string, in which case it must be a path
-            to a CA bundle to use
-        :param cert: (optional) Any user-provided SSL certificate to be trusted.
-        :param proxies: (optional) The proxies dictionary to apply to the request.
-        """
-        raise NotImplementedError
-
-    def close(self):
-        """Cleans up adapter specific items."""
-        raise NotImplementedError
-
-
-class HTTPAdapter(BaseAdapter):
-    """The built-in HTTP Adapter for urllib3.
-
-    Provides a general-case interface for Requests sessions to contact HTTP and
-    HTTPS urls by implementing the Transport Adapter interface. This class will
-    usually be created by the :class:`Session <Session>` class under the
-    covers.
-
-    :param pool_connections: The number of urllib3 connection pools to cache.
-    :param pool_maxsize: The maximum number of connections to save in the pool.
-    :param max_retries: The maximum number of retries each connection
-        should attempt. Note, this applies only to failed DNS lookups, socket
-        connections and connection timeouts, never to requests where data has
-        made it to the server. By default, Requests does not retry failed
-        connections. If you need granular control over the conditions under
-        which we retry a request, import urllib3's ``Retry`` class and pass
-        that instead.
-    :param pool_block: Whether the connection pool should block for connections.
-
-    Usage::
-
-      >>> import requests
-      >>> s = requests.Session()
-      >>> a = requests.adapters.HTTPAdapter(max_retries=3)
-      >>> s.mount('http://', a)
-    """
-    __attrs__ = ['max_retries', 'config', '_pool_connections', '_pool_maxsize',
-                 '_pool_block']
-
-    def __init__(self, pool_connections=DEFAULT_POOLSIZE,
-                 pool_maxsize=DEFAULT_POOLSIZE, max_retries=DEFAULT_RETRIES,
-                 pool_block=DEFAULT_POOLBLOCK):
-        if max_retries == DEFAULT_RETRIES:
-            self.max_retries = Retry(0, read=False)
-        else:
-            self.max_retries = Retry.from_int(max_retries)
-        self.config = {}
-        self.proxy_manager = {}
-
-        super(HTTPAdapter, self).__init__()
-
-        self._pool_connections = pool_connections
-        self._pool_maxsize = pool_maxsize
-        self._pool_block = pool_block
-
-        self.init_poolmanager(pool_connections, pool_maxsize, block=pool_block)
-
-    def __getstate__(self):
-        return {attr: getattr(self, attr, None) for attr in self.__attrs__}
-
-    def __setstate__(self, state):
-        # Can't handle by adding 'proxy_manager' to self.__attrs__ because
-        # self.poolmanager uses a lambda function, which isn't pickleable.
-        self.proxy_manager = {}
-        self.config = {}
-
-        for attr, value in state.items():
-            setattr(self, attr, value)
-
-        self.init_poolmanager(self._pool_connections, self._pool_maxsize,
-                              block=self._pool_block)
-
-    def init_poolmanager(self, connections, maxsize, block=DEFAULT_POOLBLOCK, **pool_kwargs):
-        """Initializes a urllib3 PoolManager.
-
-        This method should not be called from user code, and is only
-        exposed for use when subclassing the
-        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
-
-        :param connections: The number of urllib3 connection pools to cache.
-        :param maxsize: The maximum number of connections to save in the pool.
-        :param block: Block when no free connections are available.
-        :param pool_kwargs: Extra keyword arguments used to initialize the Pool Manager.
-        """
-        # save these values for pickling
-        self._pool_connections = connections
-        self._pool_maxsize = maxsize
-        self._pool_block = block
-
-        self.poolmanager = PoolManager(num_pools=connections, maxsize=maxsize,
-                                       block=block, strict=True, **pool_kwargs)
-
-    def proxy_manager_for(self, proxy, **proxy_kwargs):
-        """Return urllib3 ProxyManager for the given proxy.
-
-        This method should not be called from user code, and is only
-        exposed for use when subclassing the
-        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
-
-        :param proxy: The proxy to return a urllib3 ProxyManager for.
-        :param proxy_kwargs: Extra keyword arguments used to configure the Proxy Manager.
-        :returns: ProxyManager
-        :rtype: urllib3.ProxyManager
-        """
-        if proxy in self.proxy_manager:
-            manager = self.proxy_manager[proxy]
-        elif proxy.lower().startswith('socks'):
-            username, password = get_auth_from_url(proxy)
-            manager = self.proxy_manager[proxy] = SOCKSProxyManager(
-                proxy,
-                username=username,
-                password=password,
-                num_pools=self._pool_connections,
-                maxsize=self._pool_maxsize,
-                block=self._pool_block,
-                **proxy_kwargs
-            )
-        else:
-            proxy_headers = self.proxy_headers(proxy)
-            manager = self.proxy_manager[proxy] = proxy_from_url(
-                proxy,
-                proxy_headers=proxy_headers,
-                num_pools=self._pool_connections,
-                maxsize=self._pool_maxsize,
-                block=self._pool_block,
-                **proxy_kwargs)
-
-        return manager
-
-    def cert_verify(self, conn, url, verify, cert):
-        """Verify a SSL certificate. This method should not be called from user
-        code, and is only exposed for use when subclassing the
-        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
-
-        :param conn: The urllib3 connection object associated with the cert.
-        :param url: The requested URL.
-        :param verify: Either a boolean, in which case it controls whether we verify
-            the server's TLS certificate, or a string, in which case it must be a path
-            to a CA bundle to use
-        :param cert: The SSL certificate to verify.
-        """
-        if url.lower().startswith('https') and verify:
-
-            cert_loc = None
-
-            # Allow self-specified cert location.
-            if verify is not True:
-                cert_loc = verify
-
-            if not cert_loc:
-                cert_loc = extract_zipped_paths(DEFAULT_CA_BUNDLE_PATH)
-
-            if not cert_loc or not os.path.exists(cert_loc):
-                raise IOError("Could not find a suitable TLS CA certificate bundle, "
-                              "invalid path: {}".format(cert_loc))
-
-            conn.cert_reqs = 'CERT_REQUIRED'
-
-            if not os.path.isdir(cert_loc):
-                conn.ca_certs = cert_loc
-            else:
-                conn.ca_cert_dir = cert_loc
-        else:
-            conn.cert_reqs = 'CERT_NONE'
-            conn.ca_certs = None
-            conn.ca_cert_dir = None
-
-        if cert:
-            if not isinstance(cert, basestring):
-                conn.cert_file = cert[0]
-                conn.key_file = cert[1]
-            else:
-                conn.cert_file = cert
-                conn.key_file = None
-            if conn.cert_file and not os.path.exists(conn.cert_file):
-                raise IOError("Could not find the TLS certificate file, "
-                              "invalid path: {}".format(conn.cert_file))
-            if conn.key_file and not os.path.exists(conn.key_file):
-                raise IOError("Could not find the TLS key file, "
-                              "invalid path: {}".format(conn.key_file))
-
-    def build_response(self, req, resp):
-        """Builds a :class:`Response <requests.Response>` object from a urllib3
-        response. This should not be called from user code, and is only exposed
-        for use when subclassing the
-        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`
-
-        :param req: The :class:`PreparedRequest <PreparedRequest>` used to generate the response.
-        :param resp: The urllib3 response object.
-        :rtype: requests.Response
-        """
-        response = Response()
-
-        # Fallback to None if there's no status_code, for whatever reason.
-        response.status_code = getattr(resp, 'status', None)
-
-        # Make headers case-insensitive.
-        response.headers = CaseInsensitiveDict(getattr(resp, 'headers', {}))
-
-        # Set encoding.
-        response.encoding = get_encoding_from_headers(response.headers)
-        response.raw = resp
-        response.reason = response.raw.reason
-
-        if isinstance(req.url, bytes):
-            response.url = req.url.decode('utf-8')
-        else:
-            response.url = req.url
-
-        # Add new cookies from the server.
-        extract_cookies_to_jar(response.cookies, req, resp)
-
-        # Give the Response some context.
-        response.request = req
-        response.connection = self
-
-        return response
-
-    def get_connection(self, url, proxies=None):
-        """Returns a urllib3 connection for the given URL. This should not be
-        called from user code, and is only exposed for use when subclassing the
-        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
-
-        :param url: The URL to connect to.
-        :param proxies: (optional) A Requests-style dictionary of proxies used on this request.
-        :rtype: urllib3.ConnectionPool
-        """
-        proxy = select_proxy(url, proxies)
-
-        if proxy:
-            proxy = prepend_scheme_if_needed(proxy, 'http')
-            proxy_url = parse_url(proxy)
-            if not proxy_url.host:
-                raise InvalidProxyURL("Please check proxy URL. It is malformed"
-                                      " and could be missing the host.")
-            proxy_manager = self.proxy_manager_for(proxy)
-            conn = proxy_manager.connection_from_url(url)
-        else:
-            # Only scheme should be lower case
-            parsed = urlparse(url)
-            url = parsed.geturl()
-            conn = self.poolmanager.connection_from_url(url)
-
-        return conn
-
-    def close(self):
-        """Disposes of any internal state.
-
-        Currently, this closes the PoolManager and any active ProxyManager,
-        which closes any pooled connections.
-        """
-        self.poolmanager.clear()
-        for proxy in self.proxy_manager.values():
-            proxy.clear()
-
-    def request_url(self, request, proxies):
-        """Obtain the url to use when making the final request.
-
-        If the message is being sent through a HTTP proxy, the full URL has to
-        be used. Otherwise, we should only use the path portion of the URL.
-
-        This should not be called from user code, and is only exposed for use
-        when subclassing the
-        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
-
-        :param request: The :class:`PreparedRequest <PreparedRequest>` being sent.
-        :param proxies: A dictionary of schemes or schemes and hosts to proxy URLs.
-        :rtype: str
-        """
-        proxy = select_proxy(request.url, proxies)
-        scheme = urlparse(request.url).scheme
-
-        is_proxied_http_request = (proxy and scheme != 'https')
-        using_socks_proxy = False
-        if proxy:
-            proxy_scheme = urlparse(proxy).scheme.lower()
-            using_socks_proxy = proxy_scheme.startswith('socks')
-
-        url = request.path_url
-        if is_proxied_http_request and not using_socks_proxy:
-            url = urldefragauth(request.url)
-
-        return url
-
-    def add_headers(self, request, **kwargs):
-        """Add any headers needed by the connection. As of v2.0 this does
-        nothing by default, but is left for overriding by users that subclass
-        the :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
-
-        This should not be called from user code, and is only exposed for use
-        when subclassing the
-        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
-
-        :param request: The :class:`PreparedRequest <PreparedRequest>` to add headers to.
-        :param kwargs: The keyword arguments from the call to send().
-        """
-        pass
-
-    def proxy_headers(self, proxy):
-        """Returns a dictionary of the headers to add to any request sent
-        through a proxy. This works with urllib3 magic to ensure that they are
-        correctly sent to the proxy, rather than in a tunnelled request if
-        CONNECT is being used.
-
-        This should not be called from user code, and is only exposed for use
-        when subclassing the
-        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
-
-        :param proxy: The url of the proxy being used for this request.
-        :rtype: dict
-        """
-        headers = {}
-        username, password = get_auth_from_url(proxy)
-
-        if username:
-            headers['Proxy-Authorization'] = _basic_auth_str(username,
-                                                             password)
-
-        return headers
-
-    def send(self, request, stream=False, timeout=None, verify=True, cert=None, proxies=None):
-        """Sends PreparedRequest object. Returns Response object.
-
-        :param request: The :class:`PreparedRequest <PreparedRequest>` being sent.
-        :param stream: (optional) Whether to stream the request content.
-        :param timeout: (optional) How long to wait for the server to send
-            data before giving up, as a float, or a :ref:`(connect timeout,
-            read timeout) <timeouts>` tuple.
-        :type timeout: float or tuple or urllib3 Timeout object
-        :param verify: (optional) Either a boolean, in which case it controls whether
-            we verify the server's TLS certificate, or a string, in which case it
-            must be a path to a CA bundle to use
-        :param cert: (optional) Any user-provided SSL certificate to be trusted.
-        :param proxies: (optional) The proxies dictionary to apply to the request.
-        :rtype: requests.Response
-        """
-
-        try:
-            conn = self.get_connection(request.url, proxies)
-        except LocationValueError as e:
-            raise InvalidURL(e, request=request)
-
-        self.cert_verify(conn, request.url, verify, cert)
-        url = self.request_url(request, proxies)
-        self.add_headers(request, stream=stream, timeout=timeout, verify=verify, cert=cert, proxies=proxies)
-
-        chunked = not (request.body is None or 'Content-Length' in request.headers)
-
-        if isinstance(timeout, tuple):
-            try:
-                connect, read = timeout
-                timeout = TimeoutSauce(connect=connect, read=read)
-            except ValueError as e:
-                # this may raise a string formatting error.
-                err = ("Invalid timeout {}. Pass a (connect, read) "
-                       "timeout tuple, or a single float to set "
-                       "both timeouts to the same value".format(timeout))
-                raise ValueError(err)
-        elif isinstance(timeout, TimeoutSauce):
-            pass
-        else:
-            timeout = TimeoutSauce(connect=timeout, read=timeout)
-
-        try:
-            if not chunked:
-                resp = conn.urlopen(
-                    method=request.method,
-                    url=url,
-                    body=request.body,
-                    headers=request.headers,
-                    redirect=False,
-                    assert_same_host=False,
-                    preload_content=False,
-                    decode_content=False,
-                    retries=self.max_retries,
-                    timeout=timeout
-                )
-
-            # Send the request.
-            else:
-                if hasattr(conn, 'proxy_pool'):
-                    conn = conn.proxy_pool
-
-                low_conn = conn._get_conn(timeout=DEFAULT_POOL_TIMEOUT)
-
-                try:
-                    low_conn.putrequest(request.method,
-                                        url,
-                                        skip_accept_encoding=True)
-
-                    for header, value in request.headers.items():
-                        low_conn.putheader(header, value)
-
-                    low_conn.endheaders()
-
-                    for i in request.body:
-                        low_conn.send(hex(len(i))[2:].encode('utf-8'))
-                        low_conn.send(b'\r\n')
-                        low_conn.send(i)
-                        low_conn.send(b'\r\n')
-                    low_conn.send(b'0\r\n\r\n')
-
-                    # Receive the response from the server
-                    try:
-                        # For Python 2.7, use buffering of HTTP responses
-                        r = low_conn.getresponse(buffering=True)
-                    except TypeError:
-                        # For compatibility with Python 3.3+
-                        r = low_conn.getresponse()
-
-                    resp = HTTPResponse.from_httplib(
-                        r,
-                        pool=conn,
-                        connection=low_conn,
-                        preload_content=False,
-                        decode_content=False
-                    )
-                except:
-                    # If we hit any problems here, clean up the connection.
-                    # Then, reraise so that we can handle the actual exception.
-                    low_conn.close()
-                    raise
-
-        except (ProtocolError, socket.error) as err:
-            raise ConnectionError(err, request=request)
-
-        except MaxRetryError as e:
-            if isinstance(e.reason, ConnectTimeoutError):
-                # TODO: Remove this in 3.0.0: see #2811
-                if not isinstance(e.reason, NewConnectionError):
-                    raise ConnectTimeout(e, request=request)
-
-            if isinstance(e.reason, ResponseError):
-                raise RetryError(e, request=request)
-
-            if isinstance(e.reason, _ProxyError):
-                raise ProxyError(e, request=request)
-
-            if isinstance(e.reason, _SSLError):
-                # This branch is for urllib3 v1.22 and later.
-                raise SSLError(e, request=request)
-
-            raise ConnectionError(e, request=request)
-
-        except ClosedPoolError as e:
-            raise ConnectionError(e, request=request)
-
-        except _ProxyError as e:
-            raise ProxyError(e)
-
-        except (_SSLError, _HTTPError) as e:
-            if isinstance(e, _SSLError):
-                # This branch is for urllib3 versions earlier than v1.22
-                raise SSLError(e, request=request)
-            elif isinstance(e, ReadTimeoutError):
-                raise ReadTimeout(e, request=request)
-            else:
-                raise
-
-        return self.build_response(request, resp)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/api.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/api.py
deleted file mode 100644
index abada96..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/api.py
+++ /dev/null
@@ -1,158 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-requests.api
-~~~~~~~~~~~~
-
-This module implements the Requests API.
-
-:copyright: (c) 2012 by Kenneth Reitz.
-:license: Apache2, see LICENSE for more details.
-"""
-
-from . import sessions
-
-
-def request(method, url, **kwargs):
-    """Constructs and sends a :class:`Request <Request>`.
-
-    :param method: method for the new :class:`Request` object.
-    :param url: URL for the new :class:`Request` object.
-    :param params: (optional) Dictionary, list of tuples or bytes to send
-        in the body of the :class:`Request`.
-    :param data: (optional) Dictionary, list of tuples, bytes, or file-like
-        object to send in the body of the :class:`Request`.
-    :param json: (optional) A JSON serializable Python object to send in the body of the :class:`Request`.
-    :param headers: (optional) Dictionary of HTTP Headers to send with the :class:`Request`.
-    :param cookies: (optional) Dict or CookieJar object to send with the :class:`Request`.
-    :param files: (optional) Dictionary of ``'name': file-like-objects`` (or ``{'name': file-tuple}``) for multipart encoding upload.
-        ``file-tuple`` can be a 2-tuple ``('filename', fileobj)``, 3-tuple ``('filename', fileobj, 'content_type')``
-        or a 4-tuple ``('filename', fileobj, 'content_type', custom_headers)``, where ``'content-type'`` is a string
-        defining the content type of the given file and ``custom_headers`` a dict-like object containing additional headers
-        to add for the file.
-    :param auth: (optional) Auth tuple to enable Basic/Digest/Custom HTTP Auth.
-    :param timeout: (optional) How many seconds to wait for the server to send data
-        before giving up, as a float, or a :ref:`(connect timeout, read
-        timeout) <timeouts>` tuple.
-    :type timeout: float or tuple
-    :param allow_redirects: (optional) Boolean. Enable/disable GET/OPTIONS/POST/PUT/PATCH/DELETE/HEAD redirection. Defaults to ``True``.
-    :type allow_redirects: bool
-    :param proxies: (optional) Dictionary mapping protocol to the URL of the proxy.
-    :param verify: (optional) Either a boolean, in which case it controls whether we verify
-            the server's TLS certificate, or a string, in which case it must be a path
-            to a CA bundle to use. Defaults to ``True``.
-    :param stream: (optional) if ``False``, the response content will be immediately downloaded.
-    :param cert: (optional) if String, path to ssl client cert file (.pem). If Tuple, ('cert', 'key') pair.
-    :return: :class:`Response <Response>` object
-    :rtype: requests.Response
-
-    Usage::
-
-      >>> import requests
-      >>> req = requests.request('GET', 'https://httpbin.org/get')
-      <Response [200]>
-    """
-
-    # By using the 'with' statement we are sure the session is closed, thus we
-    # avoid leaving sockets open which can trigger a ResourceWarning in some
-    # cases, and look like a memory leak in others.
-    with sessions.Session() as session:
-        return session.request(method=method, url=url, **kwargs)
-
-
-def get(url, params=None, **kwargs):
-    r"""Sends a GET request.
-
-    :param url: URL for the new :class:`Request` object.
-    :param params: (optional) Dictionary, list of tuples or bytes to send
-        in the body of the :class:`Request`.
-    :param \*\*kwargs: Optional arguments that ``request`` takes.
-    :return: :class:`Response <Response>` object
-    :rtype: requests.Response
-    """
-
-    kwargs.setdefault('allow_redirects', True)
-    return request('get', url, params=params, **kwargs)
-
-
-def options(url, **kwargs):
-    r"""Sends an OPTIONS request.
-
-    :param url: URL for the new :class:`Request` object.
-    :param \*\*kwargs: Optional arguments that ``request`` takes.
-    :return: :class:`Response <Response>` object
-    :rtype: requests.Response
-    """
-
-    kwargs.setdefault('allow_redirects', True)
-    return request('options', url, **kwargs)
-
-
-def head(url, **kwargs):
-    r"""Sends a HEAD request.
-
-    :param url: URL for the new :class:`Request` object.
-    :param \*\*kwargs: Optional arguments that ``request`` takes.
-    :return: :class:`Response <Response>` object
-    :rtype: requests.Response
-    """
-
-    kwargs.setdefault('allow_redirects', False)
-    return request('head', url, **kwargs)
-
-
-def post(url, data=None, json=None, **kwargs):
-    r"""Sends a POST request.
-
-    :param url: URL for the new :class:`Request` object.
-    :param data: (optional) Dictionary, list of tuples, bytes, or file-like
-        object to send in the body of the :class:`Request`.
-    :param json: (optional) json data to send in the body of the :class:`Request`.
-    :param \*\*kwargs: Optional arguments that ``request`` takes.
-    :return: :class:`Response <Response>` object
-    :rtype: requests.Response
-    """
-
-    return request('post', url, data=data, json=json, **kwargs)
-
-
-def put(url, data=None, **kwargs):
-    r"""Sends a PUT request.
-
-    :param url: URL for the new :class:`Request` object.
-    :param data: (optional) Dictionary, list of tuples, bytes, or file-like
-        object to send in the body of the :class:`Request`.
-    :param json: (optional) json data to send in the body of the :class:`Request`.
-    :param \*\*kwargs: Optional arguments that ``request`` takes.
-    :return: :class:`Response <Response>` object
-    :rtype: requests.Response
-    """
-
-    return request('put', url, data=data, **kwargs)
-
-
-def patch(url, data=None, **kwargs):
-    r"""Sends a PATCH request.
-
-    :param url: URL for the new :class:`Request` object.
-    :param data: (optional) Dictionary, list of tuples, bytes, or file-like
-        object to send in the body of the :class:`Request`.
-    :param json: (optional) json data to send in the body of the :class:`Request`.
-    :param \*\*kwargs: Optional arguments that ``request`` takes.
-    :return: :class:`Response <Response>` object
-    :rtype: requests.Response
-    """
-
-    return request('patch', url, data=data, **kwargs)
-
-
-def delete(url, **kwargs):
-    r"""Sends a DELETE request.
-
-    :param url: URL for the new :class:`Request` object.
-    :param \*\*kwargs: Optional arguments that ``request`` takes.
-    :return: :class:`Response <Response>` object
-    :rtype: requests.Response
-    """
-
-    return request('delete', url, **kwargs)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/auth.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/auth.py
deleted file mode 100644
index bdde51c..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/auth.py
+++ /dev/null
@@ -1,305 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-requests.auth
-~~~~~~~~~~~~~
-
-This module contains the authentication handlers for Requests.
-"""
-
-import os
-import re
-import time
-import hashlib
-import threading
-import warnings
-
-from base64 import b64encode
-
-from .compat import urlparse, str, basestring
-from .cookies import extract_cookies_to_jar
-from ._internal_utils import to_native_string
-from .utils import parse_dict_header
-
-CONTENT_TYPE_FORM_URLENCODED = 'application/x-www-form-urlencoded'
-CONTENT_TYPE_MULTI_PART = 'multipart/form-data'
-
-
-def _basic_auth_str(username, password):
-    """Returns a Basic Auth string."""
-
-    # "I want us to put a big-ol' comment on top of it that
-    # says that this behaviour is dumb but we need to preserve
-    # it because people are relying on it."
-    #    - Lukasa
-    #
-    # These are here solely to maintain backwards compatibility
-    # for things like ints. This will be removed in 3.0.0.
-    if not isinstance(username, basestring):
-        warnings.warn(
-            "Non-string usernames will no longer be supported in Requests "
-            "3.0.0. Please convert the object you've passed in ({!r}) to "
-            "a string or bytes object in the near future to avoid "
-            "problems.".format(username),
-            category=DeprecationWarning,
-        )
-        username = str(username)
-
-    if not isinstance(password, basestring):
-        warnings.warn(
-            "Non-string passwords will no longer be supported in Requests "
-            "3.0.0. Please convert the object you've passed in ({!r}) to "
-            "a string or bytes object in the near future to avoid "
-            "problems.".format(password),
-            category=DeprecationWarning,
-        )
-        password = str(password)
-    # -- End Removal --
-
-    if isinstance(username, str):
-        username = username.encode('latin1')
-
-    if isinstance(password, str):
-        password = password.encode('latin1')
-
-    authstr = 'Basic ' + to_native_string(
-        b64encode(b':'.join((username, password))).strip()
-    )
-
-    return authstr
-
-
-class AuthBase(object):
-    """Base class that all auth implementations derive from"""
-
-    def __call__(self, r):
-        raise NotImplementedError('Auth hooks must be callable.')
-
-
-class HTTPBasicAuth(AuthBase):
-    """Attaches HTTP Basic Authentication to the given Request object."""
-
-    def __init__(self, username, password):
-        self.username = username
-        self.password = password
-
-    def __eq__(self, other):
-        return all([
-            self.username == getattr(other, 'username', None),
-            self.password == getattr(other, 'password', None)
-        ])
-
-    def __ne__(self, other):
-        return not self == other
-
-    def __call__(self, r):
-        r.headers['Authorization'] = _basic_auth_str(self.username, self.password)
-        return r
-
-
-class HTTPProxyAuth(HTTPBasicAuth):
-    """Attaches HTTP Proxy Authentication to a given Request object."""
-
-    def __call__(self, r):
-        r.headers['Proxy-Authorization'] = _basic_auth_str(self.username, self.password)
-        return r
-
-
-class HTTPDigestAuth(AuthBase):
-    """Attaches HTTP Digest Authentication to the given Request object."""
-
-    def __init__(self, username, password):
-        self.username = username
-        self.password = password
-        # Keep state in per-thread local storage
-        self._thread_local = threading.local()
-
-    def init_per_thread_state(self):
-        # Ensure state is initialized just once per-thread
-        if not hasattr(self._thread_local, 'init'):
-            self._thread_local.init = True
-            self._thread_local.last_nonce = ''
-            self._thread_local.nonce_count = 0
-            self._thread_local.chal = {}
-            self._thread_local.pos = None
-            self._thread_local.num_401_calls = None
-
-    def build_digest_header(self, method, url):
-        """
-        :rtype: str
-        """
-
-        realm = self._thread_local.chal['realm']
-        nonce = self._thread_local.chal['nonce']
-        qop = self._thread_local.chal.get('qop')
-        algorithm = self._thread_local.chal.get('algorithm')
-        opaque = self._thread_local.chal.get('opaque')
-        hash_utf8 = None
-
-        if algorithm is None:
-            _algorithm = 'MD5'
-        else:
-            _algorithm = algorithm.upper()
-        # lambdas assume digest modules are imported at the top level
-        if _algorithm == 'MD5' or _algorithm == 'MD5-SESS':
-            def md5_utf8(x):
-                if isinstance(x, str):
-                    x = x.encode('utf-8')
-                return hashlib.md5(x).hexdigest()
-            hash_utf8 = md5_utf8
-        elif _algorithm == 'SHA':
-            def sha_utf8(x):
-                if isinstance(x, str):
-                    x = x.encode('utf-8')
-                return hashlib.sha1(x).hexdigest()
-            hash_utf8 = sha_utf8
-        elif _algorithm == 'SHA-256':
-            def sha256_utf8(x):
-                if isinstance(x, str):
-                    x = x.encode('utf-8')
-                return hashlib.sha256(x).hexdigest()
-            hash_utf8 = sha256_utf8
-        elif _algorithm == 'SHA-512':
-            def sha512_utf8(x):
-                if isinstance(x, str):
-                    x = x.encode('utf-8')
-                return hashlib.sha512(x).hexdigest()
-            hash_utf8 = sha512_utf8
-
-        KD = lambda s, d: hash_utf8("%s:%s" % (s, d))
-
-        if hash_utf8 is None:
-            return None
-
-        # XXX not implemented yet
-        entdig = None
-        p_parsed = urlparse(url)
-        #: path is request-uri defined in RFC 2616 which should not be empty
-        path = p_parsed.path or "/"
-        if p_parsed.query:
-            path += '?' + p_parsed.query
-
-        A1 = '%s:%s:%s' % (self.username, realm, self.password)
-        A2 = '%s:%s' % (method, path)
-
-        HA1 = hash_utf8(A1)
-        HA2 = hash_utf8(A2)
-
-        if nonce == self._thread_local.last_nonce:
-            self._thread_local.nonce_count += 1
-        else:
-            self._thread_local.nonce_count = 1
-        ncvalue = '%08x' % self._thread_local.nonce_count
-        s = str(self._thread_local.nonce_count).encode('utf-8')
-        s += nonce.encode('utf-8')
-        s += time.ctime().encode('utf-8')
-        s += os.urandom(8)
-
-        cnonce = (hashlib.sha1(s).hexdigest()[:16])
-        if _algorithm == 'MD5-SESS':
-            HA1 = hash_utf8('%s:%s:%s' % (HA1, nonce, cnonce))
-
-        if not qop:
-            respdig = KD(HA1, "%s:%s" % (nonce, HA2))
-        elif qop == 'auth' or 'auth' in qop.split(','):
-            noncebit = "%s:%s:%s:%s:%s" % (
-                nonce, ncvalue, cnonce, 'auth', HA2
-            )
-            respdig = KD(HA1, noncebit)
-        else:
-            # XXX handle auth-int.
-            return None
-
-        self._thread_local.last_nonce = nonce
-
-        # XXX should the partial digests be encoded too?
-        base = 'username="%s", realm="%s", nonce="%s", uri="%s", ' \
-               'response="%s"' % (self.username, realm, nonce, path, respdig)
-        if opaque:
-            base += ', opaque="%s"' % opaque
-        if algorithm:
-            base += ', algorithm="%s"' % algorithm
-        if entdig:
-            base += ', digest="%s"' % entdig
-        if qop:
-            base += ', qop="auth", nc=%s, cnonce="%s"' % (ncvalue, cnonce)
-
-        return 'Digest %s' % (base)
-
-    def handle_redirect(self, r, **kwargs):
-        """Reset num_401_calls counter on redirects."""
-        if r.is_redirect:
-            self._thread_local.num_401_calls = 1
-
-    def handle_401(self, r, **kwargs):
-        """
-        Takes the given response and tries digest-auth, if needed.
-
-        :rtype: requests.Response
-        """
-
-        # If response is not 4xx, do not auth
-        # See https://github.com/requests/requests/issues/3772
-        if not 400 <= r.status_code < 500:
-            self._thread_local.num_401_calls = 1
-            return r
-
-        if self._thread_local.pos is not None:
-            # Rewind the file position indicator of the body to where
-            # it was to resend the request.
-            r.request.body.seek(self._thread_local.pos)
-        s_auth = r.headers.get('www-authenticate', '')
-
-        if 'digest' in s_auth.lower() and self._thread_local.num_401_calls < 2:
-
-            self._thread_local.num_401_calls += 1
-            pat = re.compile(r'digest ', flags=re.IGNORECASE)
-            self._thread_local.chal = parse_dict_header(pat.sub('', s_auth, count=1))
-
-            # Consume content and release the original connection
-            # to allow our new request to reuse the same one.
-            r.content
-            r.close()
-            prep = r.request.copy()
-            extract_cookies_to_jar(prep._cookies, r.request, r.raw)
-            prep.prepare_cookies(prep._cookies)
-
-            prep.headers['Authorization'] = self.build_digest_header(
-                prep.method, prep.url)
-            _r = r.connection.send(prep, **kwargs)
-            _r.history.append(r)
-            _r.request = prep
-
-            return _r
-
-        self._thread_local.num_401_calls = 1
-        return r
-
-    def __call__(self, r):
-        # Initialize per-thread state, if needed
-        self.init_per_thread_state()
-        # If we have a saved nonce, skip the 401
-        if self._thread_local.last_nonce:
-            r.headers['Authorization'] = self.build_digest_header(r.method, r.url)
-        try:
-            self._thread_local.pos = r.body.tell()
-        except AttributeError:
-            # In the case of HTTPDigestAuth being reused and the body of
-            # the previous request was a file-like object, pos has the
-            # file position of the previous body. Ensure it's set to
-            # None.
-            self._thread_local.pos = None
-        r.register_hook('response', self.handle_401)
-        r.register_hook('response', self.handle_redirect)
-        self._thread_local.num_401_calls = 1
-
-        return r
-
-    def __eq__(self, other):
-        return all([
-            self.username == getattr(other, 'username', None),
-            self.password == getattr(other, 'password', None)
-        ])
-
-    def __ne__(self, other):
-        return not self == other
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/certs.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/certs.py
deleted file mode 100644
index 06a594e..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/certs.py
+++ /dev/null
@@ -1,18 +0,0 @@
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-
-"""
-requests.certs
-~~~~~~~~~~~~~~
-
-This module returns the preferred default CA certificate bundle. There is
-only one — the one from the certifi package.
-
-If you are packaging Requests, e.g., for a Linux distribution or a managed
-environment, you can change the definition of where() to return a separately
-packaged CA bundle.
-"""
-from pip._vendor.certifi import where
-
-if __name__ == '__main__':
-    print(where())
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/compat.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/compat.py
deleted file mode 100644
index 6a86893..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/compat.py
+++ /dev/null
@@ -1,74 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-requests.compat
-~~~~~~~~~~~~~~~
-
-This module handles import compatibility issues between Python 2 and
-Python 3.
-"""
-
-from pip._vendor import chardet
-
-import sys
-
-# -------
-# Pythons
-# -------
-
-# Syntax sugar.
-_ver = sys.version_info
-
-#: Python 2.x?
-is_py2 = (_ver[0] == 2)
-
-#: Python 3.x?
-is_py3 = (_ver[0] == 3)
-
-# Note: We've patched out simplejson support in pip because it prevents
-#       upgrading simplejson on Windows.
-# try:
-#     import simplejson as json
-# except (ImportError, SyntaxError):
-#     # simplejson does not support Python 3.2, it throws a SyntaxError
-#     # because of u'...' Unicode literals.
-import json
-
-# ---------
-# Specifics
-# ---------
-
-if is_py2:
-    from urllib import (
-        quote, unquote, quote_plus, unquote_plus, urlencode, getproxies,
-        proxy_bypass, proxy_bypass_environment, getproxies_environment)
-    from urlparse import urlparse, urlunparse, urljoin, urlsplit, urldefrag
-    from urllib2 import parse_http_list
-    import cookielib
-    from Cookie import Morsel
-    from StringIO import StringIO
-    from collections import Callable, Mapping, MutableMapping, OrderedDict
-
-
-    builtin_str = str
-    bytes = str
-    str = unicode
-    basestring = basestring
-    numeric_types = (int, long, float)
-    integer_types = (int, long)
-
-elif is_py3:
-    from urllib.parse import urlparse, urlunparse, urljoin, urlsplit, urlencode, quote, unquote, quote_plus, unquote_plus, urldefrag
-    from urllib.request import parse_http_list, getproxies, proxy_bypass, proxy_bypass_environment, getproxies_environment
-    from http import cookiejar as cookielib
-    from http.cookies import Morsel
-    from io import StringIO
-    from collections import OrderedDict
-    from collections.abc import Callable, Mapping, MutableMapping
-
-    builtin_str = str
-    str = str
-    bytes = bytes
-    basestring = (str, bytes)
-    numeric_types = (int, float)
-    integer_types = (int,)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/cookies.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/cookies.py
deleted file mode 100644
index 56fccd9..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/cookies.py
+++ /dev/null
@@ -1,549 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-requests.cookies
-~~~~~~~~~~~~~~~~
-
-Compatibility code to be able to use `cookielib.CookieJar` with requests.
-
-requests.utils imports from here, so be careful with imports.
-"""
-
-import copy
-import time
-import calendar
-
-from ._internal_utils import to_native_string
-from .compat import cookielib, urlparse, urlunparse, Morsel, MutableMapping
-
-try:
-    import threading
-except ImportError:
-    import dummy_threading as threading
-
-
-class MockRequest(object):
-    """Wraps a `requests.Request` to mimic a `urllib2.Request`.
-
-    The code in `cookielib.CookieJar` expects this interface in order to correctly
-    manage cookie policies, i.e., determine whether a cookie can be set, given the
-    domains of the request and the cookie.
-
-    The original request object is read-only. The client is responsible for collecting
-    the new headers via `get_new_headers()` and interpreting them appropriately. You
-    probably want `get_cookie_header`, defined below.
-    """
-
-    def __init__(self, request):
-        self._r = request
-        self._new_headers = {}
-        self.type = urlparse(self._r.url).scheme
-
-    def get_type(self):
-        return self.type
-
-    def get_host(self):
-        return urlparse(self._r.url).netloc
-
-    def get_origin_req_host(self):
-        return self.get_host()
-
-    def get_full_url(self):
-        # Only return the response's URL if the user hadn't set the Host
-        # header
-        if not self._r.headers.get('Host'):
-            return self._r.url
-        # If they did set it, retrieve it and reconstruct the expected domain
-        host = to_native_string(self._r.headers['Host'], encoding='utf-8')
-        parsed = urlparse(self._r.url)
-        # Reconstruct the URL as we expect it
-        return urlunparse([
-            parsed.scheme, host, parsed.path, parsed.params, parsed.query,
-            parsed.fragment
-        ])
-
-    def is_unverifiable(self):
-        return True
-
-    def has_header(self, name):
-        return name in self._r.headers or name in self._new_headers
-
-    def get_header(self, name, default=None):
-        return self._r.headers.get(name, self._new_headers.get(name, default))
-
-    def add_header(self, key, val):
-        """cookielib has no legitimate use for this method; add it back if you find one."""
-        raise NotImplementedError("Cookie headers should be added with add_unredirected_header()")
-
-    def add_unredirected_header(self, name, value):
-        self._new_headers[name] = value
-
-    def get_new_headers(self):
-        return self._new_headers
-
-    @property
-    def unverifiable(self):
-        return self.is_unverifiable()
-
-    @property
-    def origin_req_host(self):
-        return self.get_origin_req_host()
-
-    @property
-    def host(self):
-        return self.get_host()
-
-
-class MockResponse(object):
-    """Wraps a `httplib.HTTPMessage` to mimic a `urllib.addinfourl`.
-
-    ...what? Basically, expose the parsed HTTP headers from the server response
-    the way `cookielib` expects to see them.
-    """
-
-    def __init__(self, headers):
-        """Make a MockResponse for `cookielib` to read.
-
-        :param headers: a httplib.HTTPMessage or analogous carrying the headers
-        """
-        self._headers = headers
-
-    def info(self):
-        return self._headers
-
-    def getheaders(self, name):
-        self._headers.getheaders(name)
-
-
-def extract_cookies_to_jar(jar, request, response):
-    """Extract the cookies from the response into a CookieJar.
-
-    :param jar: cookielib.CookieJar (not necessarily a RequestsCookieJar)
-    :param request: our own requests.Request object
-    :param response: urllib3.HTTPResponse object
-    """
-    if not (hasattr(response, '_original_response') and
-            response._original_response):
-        return
-    # the _original_response field is the wrapped httplib.HTTPResponse object,
-    req = MockRequest(request)
-    # pull out the HTTPMessage with the headers and put it in the mock:
-    res = MockResponse(response._original_response.msg)
-    jar.extract_cookies(res, req)
-
-
-def get_cookie_header(jar, request):
-    """
-    Produce an appropriate Cookie header string to be sent with `request`, or None.
-
-    :rtype: str
-    """
-    r = MockRequest(request)
-    jar.add_cookie_header(r)
-    return r.get_new_headers().get('Cookie')
-
-
-def remove_cookie_by_name(cookiejar, name, domain=None, path=None):
-    """Unsets a cookie by name, by default over all domains and paths.
-
-    Wraps CookieJar.clear(), is O(n).
-    """
-    clearables = []
-    for cookie in cookiejar:
-        if cookie.name != name:
-            continue
-        if domain is not None and domain != cookie.domain:
-            continue
-        if path is not None and path != cookie.path:
-            continue
-        clearables.append((cookie.domain, cookie.path, cookie.name))
-
-    for domain, path, name in clearables:
-        cookiejar.clear(domain, path, name)
-
-
-class CookieConflictError(RuntimeError):
-    """There are two cookies that meet the criteria specified in the cookie jar.
-    Use .get and .set and include domain and path args in order to be more specific.
-    """
-
-
-class RequestsCookieJar(cookielib.CookieJar, MutableMapping):
-    """Compatibility class; is a cookielib.CookieJar, but exposes a dict
-    interface.
-
-    This is the CookieJar we create by default for requests and sessions that
-    don't specify one, since some clients may expect response.cookies and
-    session.cookies to support dict operations.
-
-    Requests does not use the dict interface internally; it's just for
-    compatibility with external client code. All requests code should work
-    out of the box with externally provided instances of ``CookieJar``, e.g.
-    ``LWPCookieJar`` and ``FileCookieJar``.
-
-    Unlike a regular CookieJar, this class is pickleable.
-
-    .. warning:: dictionary operations that are normally O(1) may be O(n).
-    """
-
-    def get(self, name, default=None, domain=None, path=None):
-        """Dict-like get() that also supports optional domain and path args in
-        order to resolve naming collisions from using one cookie jar over
-        multiple domains.
-
-        .. warning:: operation is O(n), not O(1).
-        """
-        try:
-            return self._find_no_duplicates(name, domain, path)
-        except KeyError:
-            return default
-
-    def set(self, name, value, **kwargs):
-        """Dict-like set() that also supports optional domain and path args in
-        order to resolve naming collisions from using one cookie jar over
-        multiple domains.
-        """
-        # support client code that unsets cookies by assignment of a None value:
-        if value is None:
-            remove_cookie_by_name(self, name, domain=kwargs.get('domain'), path=kwargs.get('path'))
-            return
-
-        if isinstance(value, Morsel):
-            c = morsel_to_cookie(value)
-        else:
-            c = create_cookie(name, value, **kwargs)
-        self.set_cookie(c)
-        return c
-
-    def iterkeys(self):
-        """Dict-like iterkeys() that returns an iterator of names of cookies
-        from the jar.
-
-        .. seealso:: itervalues() and iteritems().
-        """
-        for cookie in iter(self):
-            yield cookie.name
-
-    def keys(self):
-        """Dict-like keys() that returns a list of names of cookies from the
-        jar.
-
-        .. seealso:: values() and items().
-        """
-        return list(self.iterkeys())
-
-    def itervalues(self):
-        """Dict-like itervalues() that returns an iterator of values of cookies
-        from the jar.
-
-        .. seealso:: iterkeys() and iteritems().
-        """
-        for cookie in iter(self):
-            yield cookie.value
-
-    def values(self):
-        """Dict-like values() that returns a list of values of cookies from the
-        jar.
-
-        .. seealso:: keys() and items().
-        """
-        return list(self.itervalues())
-
-    def iteritems(self):
-        """Dict-like iteritems() that returns an iterator of name-value tuples
-        from the jar.
-
-        .. seealso:: iterkeys() and itervalues().
-        """
-        for cookie in iter(self):
-            yield cookie.name, cookie.value
-
-    def items(self):
-        """Dict-like items() that returns a list of name-value tuples from the
-        jar. Allows client-code to call ``dict(RequestsCookieJar)`` and get a
-        vanilla python dict of key value pairs.
-
-        .. seealso:: keys() and values().
-        """
-        return list(self.iteritems())
-
-    def list_domains(self):
-        """Utility method to list all the domains in the jar."""
-        domains = []
-        for cookie in iter(self):
-            if cookie.domain not in domains:
-                domains.append(cookie.domain)
-        return domains
-
-    def list_paths(self):
-        """Utility method to list all the paths in the jar."""
-        paths = []
-        for cookie in iter(self):
-            if cookie.path not in paths:
-                paths.append(cookie.path)
-        return paths
-
-    def multiple_domains(self):
-        """Returns True if there are multiple domains in the jar.
-        Returns False otherwise.
-
-        :rtype: bool
-        """
-        domains = []
-        for cookie in iter(self):
-            if cookie.domain is not None and cookie.domain in domains:
-                return True
-            domains.append(cookie.domain)
-        return False  # there is only one domain in jar
-
-    def get_dict(self, domain=None, path=None):
-        """Takes as an argument an optional domain and path and returns a plain
-        old Python dict of name-value pairs of cookies that meet the
-        requirements.
-
-        :rtype: dict
-        """
-        dictionary = {}
-        for cookie in iter(self):
-            if (
-                (domain is None or cookie.domain == domain) and
-                (path is None or cookie.path == path)
-            ):
-                dictionary[cookie.name] = cookie.value
-        return dictionary
-
-    def __contains__(self, name):
-        try:
-            return super(RequestsCookieJar, self).__contains__(name)
-        except CookieConflictError:
-            return True
-
-    def __getitem__(self, name):
-        """Dict-like __getitem__() for compatibility with client code. Throws
-        exception if there are more than one cookie with name. In that case,
-        use the more explicit get() method instead.
-
-        .. warning:: operation is O(n), not O(1).
-        """
-        return self._find_no_duplicates(name)
-
-    def __setitem__(self, name, value):
-        """Dict-like __setitem__ for compatibility with client code. Throws
-        exception if there is already a cookie of that name in the jar. In that
-        case, use the more explicit set() method instead.
-        """
-        self.set(name, value)
-
-    def __delitem__(self, name):
-        """Deletes a cookie given a name. Wraps ``cookielib.CookieJar``'s
-        ``remove_cookie_by_name()``.
-        """
-        remove_cookie_by_name(self, name)
-
-    def set_cookie(self, cookie, *args, **kwargs):
-        if hasattr(cookie.value, 'startswith') and cookie.value.startswith('"') and cookie.value.endswith('"'):
-            cookie.value = cookie.value.replace('\\"', '')
-        return super(RequestsCookieJar, self).set_cookie(cookie, *args, **kwargs)
-
-    def update(self, other):
-        """Updates this jar with cookies from another CookieJar or dict-like"""
-        if isinstance(other, cookielib.CookieJar):
-            for cookie in other:
-                self.set_cookie(copy.copy(cookie))
-        else:
-            super(RequestsCookieJar, self).update(other)
-
-    def _find(self, name, domain=None, path=None):
-        """Requests uses this method internally to get cookie values.
-
-        If there are conflicting cookies, _find arbitrarily chooses one.
-        See _find_no_duplicates if you want an exception thrown if there are
-        conflicting cookies.
-
-        :param name: a string containing name of cookie
-        :param domain: (optional) string containing domain of cookie
-        :param path: (optional) string containing path of cookie
-        :return: cookie.value
-        """
-        for cookie in iter(self):
-            if cookie.name == name:
-                if domain is None or cookie.domain == domain:
-                    if path is None or cookie.path == path:
-                        return cookie.value
-
-        raise KeyError('name=%r, domain=%r, path=%r' % (name, domain, path))
-
-    def _find_no_duplicates(self, name, domain=None, path=None):
-        """Both ``__get_item__`` and ``get`` call this function: it's never
-        used elsewhere in Requests.
-
-        :param name: a string containing name of cookie
-        :param domain: (optional) string containing domain of cookie
-        :param path: (optional) string containing path of cookie
-        :raises KeyError: if cookie is not found
-        :raises CookieConflictError: if there are multiple cookies
-            that match name and optionally domain and path
-        :return: cookie.value
-        """
-        toReturn = None
-        for cookie in iter(self):
-            if cookie.name == name:
-                if domain is None or cookie.domain == domain:
-                    if path is None or cookie.path == path:
-                        if toReturn is not None:  # if there are multiple cookies that meet passed in criteria
-                            raise CookieConflictError('There are multiple cookies with name, %r' % (name))
-                        toReturn = cookie.value  # we will eventually return this as long as no cookie conflict
-
-        if toReturn:
-            return toReturn
-        raise KeyError('name=%r, domain=%r, path=%r' % (name, domain, path))
-
-    def __getstate__(self):
-        """Unlike a normal CookieJar, this class is pickleable."""
-        state = self.__dict__.copy()
-        # remove the unpickleable RLock object
-        state.pop('_cookies_lock')
-        return state
-
-    def __setstate__(self, state):
-        """Unlike a normal CookieJar, this class is pickleable."""
-        self.__dict__.update(state)
-        if '_cookies_lock' not in self.__dict__:
-            self._cookies_lock = threading.RLock()
-
-    def copy(self):
-        """Return a copy of this RequestsCookieJar."""
-        new_cj = RequestsCookieJar()
-        new_cj.set_policy(self.get_policy())
-        new_cj.update(self)
-        return new_cj
-
-    def get_policy(self):
-        """Return the CookiePolicy instance used."""
-        return self._policy
-
-
-def _copy_cookie_jar(jar):
-    if jar is None:
-        return None
-
-    if hasattr(jar, 'copy'):
-        # We're dealing with an instance of RequestsCookieJar
-        return jar.copy()
-    # We're dealing with a generic CookieJar instance
-    new_jar = copy.copy(jar)
-    new_jar.clear()
-    for cookie in jar:
-        new_jar.set_cookie(copy.copy(cookie))
-    return new_jar
-
-
-def create_cookie(name, value, **kwargs):
-    """Make a cookie from underspecified parameters.
-
-    By default, the pair of `name` and `value` will be set for the domain ''
-    and sent on every request (this is sometimes called a "supercookie").
-    """
-    result = {
-        'version': 0,
-        'name': name,
-        'value': value,
-        'port': None,
-        'domain': '',
-        'path': '/',
-        'secure': False,
-        'expires': None,
-        'discard': True,
-        'comment': None,
-        'comment_url': None,
-        'rest': {'HttpOnly': None},
-        'rfc2109': False,
-    }
-
-    badargs = set(kwargs) - set(result)
-    if badargs:
-        err = 'create_cookie() got unexpected keyword arguments: %s'
-        raise TypeError(err % list(badargs))
-
-    result.update(kwargs)
-    result['port_specified'] = bool(result['port'])
-    result['domain_specified'] = bool(result['domain'])
-    result['domain_initial_dot'] = result['domain'].startswith('.')
-    result['path_specified'] = bool(result['path'])
-
-    return cookielib.Cookie(**result)
-
-
-def morsel_to_cookie(morsel):
-    """Convert a Morsel object into a Cookie containing the one k/v pair."""
-
-    expires = None
-    if morsel['max-age']:
-        try:
-            expires = int(time.time() + int(morsel['max-age']))
-        except ValueError:
-            raise TypeError('max-age: %s must be integer' % morsel['max-age'])
-    elif morsel['expires']:
-        time_template = '%a, %d-%b-%Y %H:%M:%S GMT'
-        expires = calendar.timegm(
-            time.strptime(morsel['expires'], time_template)
-        )
-    return create_cookie(
-        comment=morsel['comment'],
-        comment_url=bool(morsel['comment']),
-        discard=False,
-        domain=morsel['domain'],
-        expires=expires,
-        name=morsel.key,
-        path=morsel['path'],
-        port=None,
-        rest={'HttpOnly': morsel['httponly']},
-        rfc2109=False,
-        secure=bool(morsel['secure']),
-        value=morsel.value,
-        version=morsel['version'] or 0,
-    )
-
-
-def cookiejar_from_dict(cookie_dict, cookiejar=None, overwrite=True):
-    """Returns a CookieJar from a key/value dictionary.
-
-    :param cookie_dict: Dict of key/values to insert into CookieJar.
-    :param cookiejar: (optional) A cookiejar to add the cookies to.
-    :param overwrite: (optional) If False, will not replace cookies
-        already in the jar with new ones.
-    :rtype: CookieJar
-    """
-    if cookiejar is None:
-        cookiejar = RequestsCookieJar()
-
-    if cookie_dict is not None:
-        names_from_jar = [cookie.name for cookie in cookiejar]
-        for name in cookie_dict:
-            if overwrite or (name not in names_from_jar):
-                cookiejar.set_cookie(create_cookie(name, cookie_dict[name]))
-
-    return cookiejar
-
-
-def merge_cookies(cookiejar, cookies):
-    """Add cookies to cookiejar and returns a merged CookieJar.
-
-    :param cookiejar: CookieJar object to add the cookies to.
-    :param cookies: Dictionary or CookieJar object to be added.
-    :rtype: CookieJar
-    """
-    if not isinstance(cookiejar, cookielib.CookieJar):
-        raise ValueError('You can only merge into CookieJar')
-
-    if isinstance(cookies, dict):
-        cookiejar = cookiejar_from_dict(
-            cookies, cookiejar=cookiejar, overwrite=False)
-    elif isinstance(cookies, cookielib.CookieJar):
-        try:
-            cookiejar.update(cookies)
-        except AttributeError:
-            for cookie_in_jar in cookies:
-                cookiejar.set_cookie(cookie_in_jar)
-
-    return cookiejar
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/exceptions.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/exceptions.py
deleted file mode 100644
index a91e1fd..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/exceptions.py
+++ /dev/null
@@ -1,126 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-requests.exceptions
-~~~~~~~~~~~~~~~~~~~
-
-This module contains the set of Requests' exceptions.
-"""
-from pip._vendor.urllib3.exceptions import HTTPError as BaseHTTPError
-
-
-class RequestException(IOError):
-    """There was an ambiguous exception that occurred while handling your
-    request.
-    """
-
-    def __init__(self, *args, **kwargs):
-        """Initialize RequestException with `request` and `response` objects."""
-        response = kwargs.pop('response', None)
-        self.response = response
-        self.request = kwargs.pop('request', None)
-        if (response is not None and not self.request and
-                hasattr(response, 'request')):
-            self.request = self.response.request
-        super(RequestException, self).__init__(*args, **kwargs)
-
-
-class HTTPError(RequestException):
-    """An HTTP error occurred."""
-
-
-class ConnectionError(RequestException):
-    """A Connection error occurred."""
-
-
-class ProxyError(ConnectionError):
-    """A proxy error occurred."""
-
-
-class SSLError(ConnectionError):
-    """An SSL error occurred."""
-
-
-class Timeout(RequestException):
-    """The request timed out.
-
-    Catching this error will catch both
-    :exc:`~requests.exceptions.ConnectTimeout` and
-    :exc:`~requests.exceptions.ReadTimeout` errors.
-    """
-
-
-class ConnectTimeout(ConnectionError, Timeout):
-    """The request timed out while trying to connect to the remote server.
-
-    Requests that produced this error are safe to retry.
-    """
-
-
-class ReadTimeout(Timeout):
-    """The server did not send any data in the allotted amount of time."""
-
-
-class URLRequired(RequestException):
-    """A valid URL is required to make a request."""
-
-
-class TooManyRedirects(RequestException):
-    """Too many redirects."""
-
-
-class MissingSchema(RequestException, ValueError):
-    """The URL schema (e.g. http or https) is missing."""
-
-
-class InvalidSchema(RequestException, ValueError):
-    """See defaults.py for valid schemas."""
-
-
-class InvalidURL(RequestException, ValueError):
-    """The URL provided was somehow invalid."""
-
-
-class InvalidHeader(RequestException, ValueError):
-    """The header value provided was somehow invalid."""
-
-
-class InvalidProxyURL(InvalidURL):
-    """The proxy URL provided is invalid."""
-
-
-class ChunkedEncodingError(RequestException):
-    """The server declared chunked encoding but sent an invalid chunk."""
-
-
-class ContentDecodingError(RequestException, BaseHTTPError):
-    """Failed to decode response content"""
-
-
-class StreamConsumedError(RequestException, TypeError):
-    """The content for this response was already consumed"""
-
-
-class RetryError(RequestException):
-    """Custom retries logic failed"""
-
-
-class UnrewindableBodyError(RequestException):
-    """Requests encountered an error when trying to rewind a body"""
-
-# Warnings
-
-
-class RequestsWarning(Warning):
-    """Base warning for Requests."""
-    pass
-
-
-class FileModeWarning(RequestsWarning, DeprecationWarning):
-    """A file was opened in text mode, but Requests determined its binary length."""
-    pass
-
-
-class RequestsDependencyWarning(RequestsWarning):
-    """An imported dependency doesn't match the expected version range."""
-    pass
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/help.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/help.py
deleted file mode 100644
index 3c3072b..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/help.py
+++ /dev/null
@@ -1,119 +0,0 @@
-"""Module containing bug report helper(s)."""
-from __future__ import print_function
-
-import json
-import platform
-import sys
-import ssl
-
-from pip._vendor import idna
-from pip._vendor import urllib3
-from pip._vendor import chardet
-
-from . import __version__ as requests_version
-
-try:
-    from pip._vendor.urllib3.contrib import pyopenssl
-except ImportError:
-    pyopenssl = None
-    OpenSSL = None
-    cryptography = None
-else:
-    import OpenSSL
-    import cryptography
-
-
-def _implementation():
-    """Return a dict with the Python implementation and version.
-
-    Provide both the name and the version of the Python implementation
-    currently running. For example, on CPython 2.7.5 it will return
-    {'name': 'CPython', 'version': '2.7.5'}.
-
-    This function works best on CPython and PyPy: in particular, it probably
-    doesn't work for Jython or IronPython. Future investigation should be done
-    to work out the correct shape of the code for those platforms.
-    """
-    implementation = platform.python_implementation()
-
-    if implementation == 'CPython':
-        implementation_version = platform.python_version()
-    elif implementation == 'PyPy':
-        implementation_version = '%s.%s.%s' % (sys.pypy_version_info.major,
-                                               sys.pypy_version_info.minor,
-                                               sys.pypy_version_info.micro)
-        if sys.pypy_version_info.releaselevel != 'final':
-            implementation_version = ''.join([
-                implementation_version, sys.pypy_version_info.releaselevel
-            ])
-    elif implementation == 'Jython':
-        implementation_version = platform.python_version()  # Complete Guess
-    elif implementation == 'IronPython':
-        implementation_version = platform.python_version()  # Complete Guess
-    else:
-        implementation_version = 'Unknown'
-
-    return {'name': implementation, 'version': implementation_version}
-
-
-def info():
-    """Generate information for a bug report."""
-    try:
-        platform_info = {
-            'system': platform.system(),
-            'release': platform.release(),
-        }
-    except IOError:
-        platform_info = {
-            'system': 'Unknown',
-            'release': 'Unknown',
-        }
-
-    implementation_info = _implementation()
-    urllib3_info = {'version': urllib3.__version__}
-    chardet_info = {'version': chardet.__version__}
-
-    pyopenssl_info = {
-        'version': None,
-        'openssl_version': '',
-    }
-    if OpenSSL:
-        pyopenssl_info = {
-            'version': OpenSSL.__version__,
-            'openssl_version': '%x' % OpenSSL.SSL.OPENSSL_VERSION_NUMBER,
-        }
-    cryptography_info = {
-        'version': getattr(cryptography, '__version__', ''),
-    }
-    idna_info = {
-        'version': getattr(idna, '__version__', ''),
-    }
-
-    system_ssl = ssl.OPENSSL_VERSION_NUMBER
-    system_ssl_info = {
-        'version': '%x' % system_ssl if system_ssl is not None else ''
-    }
-
-    return {
-        'platform': platform_info,
-        'implementation': implementation_info,
-        'system_ssl': system_ssl_info,
-        'using_pyopenssl': pyopenssl is not None,
-        'pyOpenSSL': pyopenssl_info,
-        'urllib3': urllib3_info,
-        'chardet': chardet_info,
-        'cryptography': cryptography_info,
-        'idna': idna_info,
-        'requests': {
-            'version': requests_version,
-        },
-    }
-
-
-def main():
-    """Pretty-print the bug information as JSON."""
-    print(json.dumps(info(), sort_keys=True, indent=2))
-
-
-if __name__ == '__main__':
-    main()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/hooks.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/hooks.py
deleted file mode 100644
index 7a51f21..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/hooks.py
+++ /dev/null
@@ -1,34 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-requests.hooks
-~~~~~~~~~~~~~~
-
-This module provides the capabilities for the Requests hooks system.
-
-Available hooks:
-
-``response``:
-    The response generated from a Request.
-"""
-HOOKS = ['response']
-
-
-def default_hooks():
-    return {event: [] for event in HOOKS}
-
-# TODO: response is the only one
-
-
-def dispatch_hook(key, hooks, hook_data, **kwargs):
-    """Dispatches a hook dictionary on a given piece of data."""
-    hooks = hooks or {}
-    hooks = hooks.get(key)
-    if hooks:
-        if hasattr(hooks, '__call__'):
-            hooks = [hooks]
-        for hook in hooks:
-            _hook_data = hook(hook_data, **kwargs)
-            if _hook_data is not None:
-                hook_data = _hook_data
-    return hook_data
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/models.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/models.py
deleted file mode 100644
index 0839957..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/models.py
+++ /dev/null
@@ -1,953 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-requests.models
-~~~~~~~~~~~~~~~
-
-This module contains the primary objects that power Requests.
-"""
-
-import datetime
-import sys
-
-# Import encoding now, to avoid implicit import later.
-# Implicit import within threads may cause LookupError when standard library is in a ZIP,
-# such as in Embedded Python. See https://github.com/requests/requests/issues/3578.
-import encodings.idna
-
-from pip._vendor.urllib3.fields import RequestField
-from pip._vendor.urllib3.filepost import encode_multipart_formdata
-from pip._vendor.urllib3.util import parse_url
-from pip._vendor.urllib3.exceptions import (
-    DecodeError, ReadTimeoutError, ProtocolError, LocationParseError)
-
-from io import UnsupportedOperation
-from .hooks import default_hooks
-from .structures import CaseInsensitiveDict
-
-from .auth import HTTPBasicAuth
-from .cookies import cookiejar_from_dict, get_cookie_header, _copy_cookie_jar
-from .exceptions import (
-    HTTPError, MissingSchema, InvalidURL, ChunkedEncodingError,
-    ContentDecodingError, ConnectionError, StreamConsumedError)
-from ._internal_utils import to_native_string, unicode_is_ascii
-from .utils import (
-    guess_filename, get_auth_from_url, requote_uri,
-    stream_decode_response_unicode, to_key_val_list, parse_header_links,
-    iter_slices, guess_json_utf, super_len, check_header_validity)
-from .compat import (
-    Callable, Mapping,
-    cookielib, urlunparse, urlsplit, urlencode, str, bytes,
-    is_py2, chardet, builtin_str, basestring)
-from .compat import json as complexjson
-from .status_codes import codes
-
-#: The set of HTTP status codes that indicate an automatically
-#: processable redirect.
-REDIRECT_STATI = (
-    codes.moved,               # 301
-    codes.found,               # 302
-    codes.other,               # 303
-    codes.temporary_redirect,  # 307
-    codes.permanent_redirect,  # 308
-)
-
-DEFAULT_REDIRECT_LIMIT = 30
-CONTENT_CHUNK_SIZE = 10 * 1024
-ITER_CHUNK_SIZE = 512
-
-
-class RequestEncodingMixin(object):
-    @property
-    def path_url(self):
-        """Build the path URL to use."""
-
-        url = []
-
-        p = urlsplit(self.url)
-
-        path = p.path
-        if not path:
-            path = '/'
-
-        url.append(path)
-
-        query = p.query
-        if query:
-            url.append('?')
-            url.append(query)
-
-        return ''.join(url)
-
-    @staticmethod
-    def _encode_params(data):
-        """Encode parameters in a piece of data.
-
-        Will successfully encode parameters when passed as a dict or a list of
-        2-tuples. Order is retained if data is a list of 2-tuples but arbitrary
-        if parameters are supplied as a dict.
-        """
-
-        if isinstance(data, (str, bytes)):
-            return data
-        elif hasattr(data, 'read'):
-            return data
-        elif hasattr(data, '__iter__'):
-            result = []
-            for k, vs in to_key_val_list(data):
-                if isinstance(vs, basestring) or not hasattr(vs, '__iter__'):
-                    vs = [vs]
-                for v in vs:
-                    if v is not None:
-                        result.append(
-                            (k.encode('utf-8') if isinstance(k, str) else k,
-                             v.encode('utf-8') if isinstance(v, str) else v))
-            return urlencode(result, doseq=True)
-        else:
-            return data
-
-    @staticmethod
-    def _encode_files(files, data):
-        """Build the body for a multipart/form-data request.
-
-        Will successfully encode files when passed as a dict or a list of
-        tuples. Order is retained if data is a list of tuples but arbitrary
-        if parameters are supplied as a dict.
-        The tuples may be 2-tuples (filename, fileobj), 3-tuples (filename, fileobj, contentype)
-        or 4-tuples (filename, fileobj, contentype, custom_headers).
-        """
-        if (not files):
-            raise ValueError("Files must be provided.")
-        elif isinstance(data, basestring):
-            raise ValueError("Data must not be a string.")
-
-        new_fields = []
-        fields = to_key_val_list(data or {})
-        files = to_key_val_list(files or {})
-
-        for field, val in fields:
-            if isinstance(val, basestring) or not hasattr(val, '__iter__'):
-                val = [val]
-            for v in val:
-                if v is not None:
-                    # Don't call str() on bytestrings: in Py3 it all goes wrong.
-                    if not isinstance(v, bytes):
-                        v = str(v)
-
-                    new_fields.append(
-                        (field.decode('utf-8') if isinstance(field, bytes) else field,
-                         v.encode('utf-8') if isinstance(v, str) else v))
-
-        for (k, v) in files:
-            # support for explicit filename
-            ft = None
-            fh = None
-            if isinstance(v, (tuple, list)):
-                if len(v) == 2:
-                    fn, fp = v
-                elif len(v) == 3:
-                    fn, fp, ft = v
-                else:
-                    fn, fp, ft, fh = v
-            else:
-                fn = guess_filename(v) or k
-                fp = v
-
-            if isinstance(fp, (str, bytes, bytearray)):
-                fdata = fp
-            elif hasattr(fp, 'read'):
-                fdata = fp.read()
-            elif fp is None:
-                continue
-            else:
-                fdata = fp
-
-            rf = RequestField(name=k, data=fdata, filename=fn, headers=fh)
-            rf.make_multipart(content_type=ft)
-            new_fields.append(rf)
-
-        body, content_type = encode_multipart_formdata(new_fields)
-
-        return body, content_type
-
-
-class RequestHooksMixin(object):
-    def register_hook(self, event, hook):
-        """Properly register a hook."""
-
-        if event not in self.hooks:
-            raise ValueError('Unsupported event specified, with event name "%s"' % (event))
-
-        if isinstance(hook, Callable):
-            self.hooks[event].append(hook)
-        elif hasattr(hook, '__iter__'):
-            self.hooks[event].extend(h for h in hook if isinstance(h, Callable))
-
-    def deregister_hook(self, event, hook):
-        """Deregister a previously registered hook.
-        Returns True if the hook existed, False if not.
-        """
-
-        try:
-            self.hooks[event].remove(hook)
-            return True
-        except ValueError:
-            return False
-
-
-class Request(RequestHooksMixin):
-    """A user-created :class:`Request <Request>` object.
-
-    Used to prepare a :class:`PreparedRequest <PreparedRequest>`, which is sent to the server.
-
-    :param method: HTTP method to use.
-    :param url: URL to send.
-    :param headers: dictionary of headers to send.
-    :param files: dictionary of {filename: fileobject} files to multipart upload.
-    :param data: the body to attach to the request. If a dictionary or
-        list of tuples ``[(key, value)]`` is provided, form-encoding will
-        take place.
-    :param json: json for the body to attach to the request (if files or data is not specified).
-    :param params: URL parameters to append to the URL. If a dictionary or
-        list of tuples ``[(key, value)]`` is provided, form-encoding will
-        take place.
-    :param auth: Auth handler or (user, pass) tuple.
-    :param cookies: dictionary or CookieJar of cookies to attach to this request.
-    :param hooks: dictionary of callback hooks, for internal usage.
-
-    Usage::
-
-      >>> import requests
-      >>> req = requests.Request('GET', 'https://httpbin.org/get')
-      >>> req.prepare()
-      <PreparedRequest [GET]>
-    """
-
-    def __init__(self,
-            method=None, url=None, headers=None, files=None, data=None,
-            params=None, auth=None, cookies=None, hooks=None, json=None):
-
-        # Default empty dicts for dict params.
-        data = [] if data is None else data
-        files = [] if files is None else files
-        headers = {} if headers is None else headers
-        params = {} if params is None else params
-        hooks = {} if hooks is None else hooks
-
-        self.hooks = default_hooks()
-        for (k, v) in list(hooks.items()):
-            self.register_hook(event=k, hook=v)
-
-        self.method = method
-        self.url = url
-        self.headers = headers
-        self.files = files
-        self.data = data
-        self.json = json
-        self.params = params
-        self.auth = auth
-        self.cookies = cookies
-
-    def __repr__(self):
-        return '<Request [%s]>' % (self.method)
-
-    def prepare(self):
-        """Constructs a :class:`PreparedRequest <PreparedRequest>` for transmission and returns it."""
-        p = PreparedRequest()
-        p.prepare(
-            method=self.method,
-            url=self.url,
-            headers=self.headers,
-            files=self.files,
-            data=self.data,
-            json=self.json,
-            params=self.params,
-            auth=self.auth,
-            cookies=self.cookies,
-            hooks=self.hooks,
-        )
-        return p
-
-
-class PreparedRequest(RequestEncodingMixin, RequestHooksMixin):
-    """The fully mutable :class:`PreparedRequest <PreparedRequest>` object,
-    containing the exact bytes that will be sent to the server.
-
-    Generated from either a :class:`Request <Request>` object or manually.
-
-    Usage::
-
-      >>> import requests
-      >>> req = requests.Request('GET', 'https://httpbin.org/get')
-      >>> r = req.prepare()
-      <PreparedRequest [GET]>
-
-      >>> s = requests.Session()
-      >>> s.send(r)
-      <Response [200]>
-    """
-
-    def __init__(self):
-        #: HTTP verb to send to the server.
-        self.method = None
-        #: HTTP URL to send the request to.
-        self.url = None
-        #: dictionary of HTTP headers.
-        self.headers = None
-        # The `CookieJar` used to create the Cookie header will be stored here
-        # after prepare_cookies is called
-        self._cookies = None
-        #: request body to send to the server.
-        self.body = None
-        #: dictionary of callback hooks, for internal usage.
-        self.hooks = default_hooks()
-        #: integer denoting starting position of a readable file-like body.
-        self._body_position = None
-
-    def prepare(self,
-            method=None, url=None, headers=None, files=None, data=None,
-            params=None, auth=None, cookies=None, hooks=None, json=None):
-        """Prepares the entire request with the given parameters."""
-
-        self.prepare_method(method)
-        self.prepare_url(url, params)
-        self.prepare_headers(headers)
-        self.prepare_cookies(cookies)
-        self.prepare_body(data, files, json)
-        self.prepare_auth(auth, url)
-
-        # Note that prepare_auth must be last to enable authentication schemes
-        # such as OAuth to work on a fully prepared request.
-
-        # This MUST go after prepare_auth. Authenticators could add a hook
-        self.prepare_hooks(hooks)
-
-    def __repr__(self):
-        return '<PreparedRequest [%s]>' % (self.method)
-
-    def copy(self):
-        p = PreparedRequest()
-        p.method = self.method
-        p.url = self.url
-        p.headers = self.headers.copy() if self.headers is not None else None
-        p._cookies = _copy_cookie_jar(self._cookies)
-        p.body = self.body
-        p.hooks = self.hooks
-        p._body_position = self._body_position
-        return p
-
-    def prepare_method(self, method):
-        """Prepares the given HTTP method."""
-        self.method = method
-        if self.method is not None:
-            self.method = to_native_string(self.method.upper())
-
-    @staticmethod
-    def _get_idna_encoded_host(host):
-        from pip._vendor import idna
-
-        try:
-            host = idna.encode(host, uts46=True).decode('utf-8')
-        except idna.IDNAError:
-            raise UnicodeError
-        return host
-
-    def prepare_url(self, url, params):
-        """Prepares the given HTTP URL."""
-        #: Accept objects that have string representations.
-        #: We're unable to blindly call unicode/str functions
-        #: as this will include the bytestring indicator (b'')
-        #: on python 3.x.
-        #: https://github.com/requests/requests/pull/2238
-        if isinstance(url, bytes):
-            url = url.decode('utf8')
-        else:
-            url = unicode(url) if is_py2 else str(url)
-
-        # Remove leading whitespaces from url
-        url = url.lstrip()
-
-        # Don't do any URL preparation for non-HTTP schemes like `mailto`,
-        # `data` etc to work around exceptions from `url_parse`, which
-        # handles RFC 3986 only.
-        if ':' in url and not url.lower().startswith('http'):
-            self.url = url
-            return
-
-        # Support for unicode domain names and paths.
-        try:
-            scheme, auth, host, port, path, query, fragment = parse_url(url)
-        except LocationParseError as e:
-            raise InvalidURL(*e.args)
-
-        if not scheme:
-            error = ("Invalid URL {0!r}: No schema supplied. Perhaps you meant http://{0}?")
-            error = error.format(to_native_string(url, 'utf8'))
-
-            raise MissingSchema(error)
-
-        if not host:
-            raise InvalidURL("Invalid URL %r: No host supplied" % url)
-
-        # In general, we want to try IDNA encoding the hostname if the string contains
-        # non-ASCII characters. This allows users to automatically get the correct IDNA
-        # behaviour. For strings containing only ASCII characters, we need to also verify
-        # it doesn't start with a wildcard (*), before allowing the unencoded hostname.
-        if not unicode_is_ascii(host):
-            try:
-                host = self._get_idna_encoded_host(host)
-            except UnicodeError:
-                raise InvalidURL('URL has an invalid label.')
-        elif host.startswith(u'*'):
-            raise InvalidURL('URL has an invalid label.')
-
-        # Carefully reconstruct the network location
-        netloc = auth or ''
-        if netloc:
-            netloc += '@'
-        netloc += host
-        if port:
-            netloc += ':' + str(port)
-
-        # Bare domains aren't valid URLs.
-        if not path:
-            path = '/'
-
-        if is_py2:
-            if isinstance(scheme, str):
-                scheme = scheme.encode('utf-8')
-            if isinstance(netloc, str):
-                netloc = netloc.encode('utf-8')
-            if isinstance(path, str):
-                path = path.encode('utf-8')
-            if isinstance(query, str):
-                query = query.encode('utf-8')
-            if isinstance(fragment, str):
-                fragment = fragment.encode('utf-8')
-
-        if isinstance(params, (str, bytes)):
-            params = to_native_string(params)
-
-        enc_params = self._encode_params(params)
-        if enc_params:
-            if query:
-                query = '%s&%s' % (query, enc_params)
-            else:
-                query = enc_params
-
-        url = requote_uri(urlunparse([scheme, netloc, path, None, query, fragment]))
-        self.url = url
-
-    def prepare_headers(self, headers):
-        """Prepares the given HTTP headers."""
-
-        self.headers = CaseInsensitiveDict()
-        if headers:
-            for header in headers.items():
-                # Raise exception on invalid header value.
-                check_header_validity(header)
-                name, value = header
-                self.headers[to_native_string(name)] = value
-
-    def prepare_body(self, data, files, json=None):
-        """Prepares the given HTTP body data."""
-
-        # Check if file, fo, generator, iterator.
-        # If not, run through normal process.
-
-        # Nottin' on you.
-        body = None
-        content_type = None
-
-        if not data and json is not None:
-            # urllib3 requires a bytes-like body. Python 2's json.dumps
-            # provides this natively, but Python 3 gives a Unicode string.
-            content_type = 'application/json'
-            body = complexjson.dumps(json)
-            if not isinstance(body, bytes):
-                body = body.encode('utf-8')
-
-        is_stream = all([
-            hasattr(data, '__iter__'),
-            not isinstance(data, (basestring, list, tuple, Mapping))
-        ])
-
-        try:
-            length = super_len(data)
-        except (TypeError, AttributeError, UnsupportedOperation):
-            length = None
-
-        if is_stream:
-            body = data
-
-            if getattr(body, 'tell', None) is not None:
-                # Record the current file position before reading.
-                # This will allow us to rewind a file in the event
-                # of a redirect.
-                try:
-                    self._body_position = body.tell()
-                except (IOError, OSError):
-                    # This differentiates from None, allowing us to catch
-                    # a failed `tell()` later when trying to rewind the body
-                    self._body_position = object()
-
-            if files:
-                raise NotImplementedError('Streamed bodies and files are mutually exclusive.')
-
-            if length:
-                self.headers['Content-Length'] = builtin_str(length)
-            else:
-                self.headers['Transfer-Encoding'] = 'chunked'
-        else:
-            # Multi-part file uploads.
-            if files:
-                (body, content_type) = self._encode_files(files, data)
-            else:
-                if data:
-                    body = self._encode_params(data)
-                    if isinstance(data, basestring) or hasattr(data, 'read'):
-                        content_type = None
-                    else:
-                        content_type = 'application/x-www-form-urlencoded'
-
-            self.prepare_content_length(body)
-
-            # Add content-type if it wasn't explicitly provided.
-            if content_type and ('content-type' not in self.headers):
-                self.headers['Content-Type'] = content_type
-
-        self.body = body
-
-    def prepare_content_length(self, body):
-        """Prepare Content-Length header based on request method and body"""
-        if body is not None:
-            length = super_len(body)
-            if length:
-                # If length exists, set it. Otherwise, we fallback
-                # to Transfer-Encoding: chunked.
-                self.headers['Content-Length'] = builtin_str(length)
-        elif self.method not in ('GET', 'HEAD') and self.headers.get('Content-Length') is None:
-            # Set Content-Length to 0 for methods that can have a body
-            # but don't provide one. (i.e. not GET or HEAD)
-            self.headers['Content-Length'] = '0'
-
-    def prepare_auth(self, auth, url=''):
-        """Prepares the given HTTP auth data."""
-
-        # If no Auth is explicitly provided, extract it from the URL first.
-        if auth is None:
-            url_auth = get_auth_from_url(self.url)
-            auth = url_auth if any(url_auth) else None
-
-        if auth:
-            if isinstance(auth, tuple) and len(auth) == 2:
-                # special-case basic HTTP auth
-                auth = HTTPBasicAuth(*auth)
-
-            # Allow auth to make its changes.
-            r = auth(self)
-
-            # Update self to reflect the auth changes.
-            self.__dict__.update(r.__dict__)
-
-            # Recompute Content-Length
-            self.prepare_content_length(self.body)
-
-    def prepare_cookies(self, cookies):
-        """Prepares the given HTTP cookie data.
-
-        This function eventually generates a ``Cookie`` header from the
-        given cookies using cookielib. Due to cookielib's design, the header
-        will not be regenerated if it already exists, meaning this function
-        can only be called once for the life of the
-        :class:`PreparedRequest <PreparedRequest>` object. Any subsequent calls
-        to ``prepare_cookies`` will have no actual effect, unless the "Cookie"
-        header is removed beforehand.
-        """
-        if isinstance(cookies, cookielib.CookieJar):
-            self._cookies = cookies
-        else:
-            self._cookies = cookiejar_from_dict(cookies)
-
-        cookie_header = get_cookie_header(self._cookies, self)
-        if cookie_header is not None:
-            self.headers['Cookie'] = cookie_header
-
-    def prepare_hooks(self, hooks):
-        """Prepares the given hooks."""
-        # hooks can be passed as None to the prepare method and to this
-        # method. To prevent iterating over None, simply use an empty list
-        # if hooks is False-y
-        hooks = hooks or []
-        for event in hooks:
-            self.register_hook(event, hooks[event])
-
-
-class Response(object):
-    """The :class:`Response <Response>` object, which contains a
-    server's response to an HTTP request.
-    """
-
-    __attrs__ = [
-        '_content', 'status_code', 'headers', 'url', 'history',
-        'encoding', 'reason', 'cookies', 'elapsed', 'request'
-    ]
-
-    def __init__(self):
-        self._content = False
-        self._content_consumed = False
-        self._next = None
-
-        #: Integer Code of responded HTTP Status, e.g. 404 or 200.
-        self.status_code = None
-
-        #: Case-insensitive Dictionary of Response Headers.
-        #: For example, ``headers['content-encoding']`` will return the
-        #: value of a ``'Content-Encoding'`` response header.
-        self.headers = CaseInsensitiveDict()
-
-        #: File-like object representation of response (for advanced usage).
-        #: Use of ``raw`` requires that ``stream=True`` be set on the request.
-        # This requirement does not apply for use internally to Requests.
-        self.raw = None
-
-        #: Final URL location of Response.
-        self.url = None
-
-        #: Encoding to decode with when accessing r.text.
-        self.encoding = None
-
-        #: A list of :class:`Response <Response>` objects from
-        #: the history of the Request. Any redirect responses will end
-        #: up here. The list is sorted from the oldest to the most recent request.
-        self.history = []
-
-        #: Textual reason of responded HTTP Status, e.g. "Not Found" or "OK".
-        self.reason = None
-
-        #: A CookieJar of Cookies the server sent back.
-        self.cookies = cookiejar_from_dict({})
-
-        #: The amount of time elapsed between sending the request
-        #: and the arrival of the response (as a timedelta).
-        #: This property specifically measures the time taken between sending
-        #: the first byte of the request and finishing parsing the headers. It
-        #: is therefore unaffected by consuming the response content or the
-        #: value of the ``stream`` keyword argument.
-        self.elapsed = datetime.timedelta(0)
-
-        #: The :class:`PreparedRequest <PreparedRequest>` object to which this
-        #: is a response.
-        self.request = None
-
-    def __enter__(self):
-        return self
-
-    def __exit__(self, *args):
-        self.close()
-
-    def __getstate__(self):
-        # Consume everything; accessing the content attribute makes
-        # sure the content has been fully read.
-        if not self._content_consumed:
-            self.content
-
-        return {attr: getattr(self, attr, None) for attr in self.__attrs__}
-
-    def __setstate__(self, state):
-        for name, value in state.items():
-            setattr(self, name, value)
-
-        # pickled objects do not have .raw
-        setattr(self, '_content_consumed', True)
-        setattr(self, 'raw', None)
-
-    def __repr__(self):
-        return '<Response [%s]>' % (self.status_code)
-
-    def __bool__(self):
-        """Returns True if :attr:`status_code` is less than 400.
-
-        This attribute checks if the status code of the response is between
-        400 and 600 to see if there was a client error or a server error. If
-        the status code, is between 200 and 400, this will return True. This
-        is **not** a check to see if the response code is ``200 OK``.
-        """
-        return self.ok
-
-    def __nonzero__(self):
-        """Returns True if :attr:`status_code` is less than 400.
-
-        This attribute checks if the status code of the response is between
-        400 and 600 to see if there was a client error or a server error. If
-        the status code, is between 200 and 400, this will return True. This
-        is **not** a check to see if the response code is ``200 OK``.
-        """
-        return self.ok
-
-    def __iter__(self):
-        """Allows you to use a response as an iterator."""
-        return self.iter_content(128)
-
-    @property
-    def ok(self):
-        """Returns True if :attr:`status_code` is less than 400, False if not.
-
-        This attribute checks if the status code of the response is between
-        400 and 600 to see if there was a client error or a server error. If
-        the status code is between 200 and 400, this will return True. This
-        is **not** a check to see if the response code is ``200 OK``.
-        """
-        try:
-            self.raise_for_status()
-        except HTTPError:
-            return False
-        return True
-
-    @property
-    def is_redirect(self):
-        """True if this Response is a well-formed HTTP redirect that could have
-        been processed automatically (by :meth:`Session.resolve_redirects`).
-        """
-        return ('location' in self.headers and self.status_code in REDIRECT_STATI)
-
-    @property
-    def is_permanent_redirect(self):
-        """True if this Response one of the permanent versions of redirect."""
-        return ('location' in self.headers and self.status_code in (codes.moved_permanently, codes.permanent_redirect))
-
-    @property
-    def next(self):
-        """Returns a PreparedRequest for the next request in a redirect chain, if there is one."""
-        return self._next
-
-    @property
-    def apparent_encoding(self):
-        """The apparent encoding, provided by the chardet library."""
-        return chardet.detect(self.content)['encoding']
-
-    def iter_content(self, chunk_size=1, decode_unicode=False):
-        """Iterates over the response data.  When stream=True is set on the
-        request, this avoids reading the content at once into memory for
-        large responses.  The chunk size is the number of bytes it should
-        read into memory.  This is not necessarily the length of each item
-        returned as decoding can take place.
-
-        chunk_size must be of type int or None. A value of None will
-        function differently depending on the value of `stream`.
-        stream=True will read data as it arrives in whatever size the
-        chunks are received. If stream=False, data is returned as
-        a single chunk.
-
-        If decode_unicode is True, content will be decoded using the best
-        available encoding based on the response.
-        """
-
-        def generate():
-            # Special case for urllib3.
-            if hasattr(self.raw, 'stream'):
-                try:
-                    for chunk in self.raw.stream(chunk_size, decode_content=True):
-                        yield chunk
-                except ProtocolError as e:
-                    raise ChunkedEncodingError(e)
-                except DecodeError as e:
-                    raise ContentDecodingError(e)
-                except ReadTimeoutError as e:
-                    raise ConnectionError(e)
-            else:
-                # Standard file-like object.
-                while True:
-                    chunk = self.raw.read(chunk_size)
-                    if not chunk:
-                        break
-                    yield chunk
-
-            self._content_consumed = True
-
-        if self._content_consumed and isinstance(self._content, bool):
-            raise StreamConsumedError()
-        elif chunk_size is not None and not isinstance(chunk_size, int):
-            raise TypeError("chunk_size must be an int, it is instead a %s." % type(chunk_size))
-        # simulate reading small chunks of the content
-        reused_chunks = iter_slices(self._content, chunk_size)
-
-        stream_chunks = generate()
-
-        chunks = reused_chunks if self._content_consumed else stream_chunks
-
-        if decode_unicode:
-            chunks = stream_decode_response_unicode(chunks, self)
-
-        return chunks
-
-    def iter_lines(self, chunk_size=ITER_CHUNK_SIZE, decode_unicode=False, delimiter=None):
-        """Iterates over the response data, one line at a time.  When
-        stream=True is set on the request, this avoids reading the
-        content at once into memory for large responses.
-
-        .. note:: This method is not reentrant safe.
-        """
-
-        pending = None
-
-        for chunk in self.iter_content(chunk_size=chunk_size, decode_unicode=decode_unicode):
-
-            if pending is not None:
-                chunk = pending + chunk
-
-            if delimiter:
-                lines = chunk.split(delimiter)
-            else:
-                lines = chunk.splitlines()
-
-            if lines and lines[-1] and chunk and lines[-1][-1] == chunk[-1]:
-                pending = lines.pop()
-            else:
-                pending = None
-
-            for line in lines:
-                yield line
-
-        if pending is not None:
-            yield pending
-
-    @property
-    def content(self):
-        """Content of the response, in bytes."""
-
-        if self._content is False:
-            # Read the contents.
-            if self._content_consumed:
-                raise RuntimeError(
-                    'The content for this response was already consumed')
-
-            if self.status_code == 0 or self.raw is None:
-                self._content = None
-            else:
-                self._content = b''.join(self.iter_content(CONTENT_CHUNK_SIZE)) or b''
-
-        self._content_consumed = True
-        # don't need to release the connection; that's been handled by urllib3
-        # since we exhausted the data.
-        return self._content
-
-    @property
-    def text(self):
-        """Content of the response, in unicode.
-
-        If Response.encoding is None, encoding will be guessed using
-        ``chardet``.
-
-        The encoding of the response content is determined based solely on HTTP
-        headers, following RFC 2616 to the letter. If you can take advantage of
-        non-HTTP knowledge to make a better guess at the encoding, you should
-        set ``r.encoding`` appropriately before accessing this property.
-        """
-
-        # Try charset from content-type
-        content = None
-        encoding = self.encoding
-
-        if not self.content:
-            return str('')
-
-        # Fallback to auto-detected encoding.
-        if self.encoding is None:
-            encoding = self.apparent_encoding
-
-        # Decode unicode from given encoding.
-        try:
-            content = str(self.content, encoding, errors='replace')
-        except (LookupError, TypeError):
-            # A LookupError is raised if the encoding was not found which could
-            # indicate a misspelling or similar mistake.
-            #
-            # A TypeError can be raised if encoding is None
-            #
-            # So we try blindly encoding.
-            content = str(self.content, errors='replace')
-
-        return content
-
-    def json(self, **kwargs):
-        r"""Returns the json-encoded content of a response, if any.
-
-        :param \*\*kwargs: Optional arguments that ``json.loads`` takes.
-        :raises ValueError: If the response body does not contain valid json.
-        """
-
-        if not self.encoding and self.content and len(self.content) > 3:
-            # No encoding set. JSON RFC 4627 section 3 states we should expect
-            # UTF-8, -16 or -32. Detect which one to use; If the detection or
-            # decoding fails, fall back to `self.text` (using chardet to make
-            # a best guess).
-            encoding = guess_json_utf(self.content)
-            if encoding is not None:
-                try:
-                    return complexjson.loads(
-                        self.content.decode(encoding), **kwargs
-                    )
-                except UnicodeDecodeError:
-                    # Wrong UTF codec detected; usually because it's not UTF-8
-                    # but some other 8-bit codec.  This is an RFC violation,
-                    # and the server didn't bother to tell us what codec *was*
-                    # used.
-                    pass
-        return complexjson.loads(self.text, **kwargs)
-
-    @property
-    def links(self):
-        """Returns the parsed header links of the response, if any."""
-
-        header = self.headers.get('link')
-
-        # l = MultiDict()
-        l = {}
-
-        if header:
-            links = parse_header_links(header)
-
-            for link in links:
-                key = link.get('rel') or link.get('url')
-                l[key] = link
-
-        return l
-
-    def raise_for_status(self):
-        """Raises stored :class:`HTTPError`, if one occurred."""
-
-        http_error_msg = ''
-        if isinstance(self.reason, bytes):
-            # We attempt to decode utf-8 first because some servers
-            # choose to localize their reason strings. If the string
-            # isn't utf-8, we fall back to iso-8859-1 for all other
-            # encodings. (See PR #3538)
-            try:
-                reason = self.reason.decode('utf-8')
-            except UnicodeDecodeError:
-                reason = self.reason.decode('iso-8859-1')
-        else:
-            reason = self.reason
-
-        if 400 <= self.status_code < 500:
-            http_error_msg = u'%s Client Error: %s for url: %s' % (self.status_code, reason, self.url)
-
-        elif 500 <= self.status_code < 600:
-            http_error_msg = u'%s Server Error: %s for url: %s' % (self.status_code, reason, self.url)
-
-        if http_error_msg:
-            raise HTTPError(http_error_msg, response=self)
-
-    def close(self):
-        """Releases the connection back to the pool. Once this method has been
-        called the underlying ``raw`` object must not be accessed again.
-
-        *Note: Should not normally need to be called explicitly.*
-        """
-        if not self._content_consumed:
-            self.raw.close()
-
-        release_conn = getattr(self.raw, 'release_conn', None)
-        if release_conn is not None:
-            release_conn()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/packages.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/packages.py
deleted file mode 100644
index 9582fa7..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/packages.py
+++ /dev/null
@@ -1,16 +0,0 @@
-import sys
-
-# This code exists for backwards compatibility reasons.
-# I don't like it either. Just look the other way. :)
-
-for package in ('urllib3', 'idna', 'chardet'):
-    vendored_package = "pip._vendor." + package
-    locals()[package] = __import__(vendored_package)
-    # This traversal is apparently necessary such that the identities are
-    # preserved (requests.packages.urllib3.* is urllib3.*)
-    for mod in list(sys.modules):
-        if mod == vendored_package or mod.startswith(vendored_package + '.'):
-            unprefixed_mod = mod[len("pip._vendor."):]
-            sys.modules['pip._vendor.requests.packages.' + unprefixed_mod] = sys.modules[mod]
-
-# Kinda cool, though, right?
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/sessions.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/sessions.py
deleted file mode 100644
index d73d700..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/sessions.py
+++ /dev/null
@@ -1,770 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-requests.session
-~~~~~~~~~~~~~~~~
-
-This module provides a Session object to manage and persist settings across
-requests (cookies, auth, proxies).
-"""
-import os
-import sys
-import time
-from datetime import timedelta
-
-from .auth import _basic_auth_str
-from .compat import cookielib, is_py3, OrderedDict, urljoin, urlparse, Mapping
-from .cookies import (
-    cookiejar_from_dict, extract_cookies_to_jar, RequestsCookieJar, merge_cookies)
-from .models import Request, PreparedRequest, DEFAULT_REDIRECT_LIMIT
-from .hooks import default_hooks, dispatch_hook
-from ._internal_utils import to_native_string
-from .utils import to_key_val_list, default_headers, DEFAULT_PORTS
-from .exceptions import (
-    TooManyRedirects, InvalidSchema, ChunkedEncodingError, ContentDecodingError)
-
-from .structures import CaseInsensitiveDict
-from .adapters import HTTPAdapter
-
-from .utils import (
-    requote_uri, get_environ_proxies, get_netrc_auth, should_bypass_proxies,
-    get_auth_from_url, rewind_body
-)
-
-from .status_codes import codes
-
-# formerly defined here, reexposed here for backward compatibility
-from .models import REDIRECT_STATI
-
-# Preferred clock, based on which one is more accurate on a given system.
-if sys.platform == 'win32':
-    try:  # Python 3.4+
-        preferred_clock = time.perf_counter
-    except AttributeError:  # Earlier than Python 3.
-        preferred_clock = time.clock
-else:
-    preferred_clock = time.time
-
-
-def merge_setting(request_setting, session_setting, dict_class=OrderedDict):
-    """Determines appropriate setting for a given request, taking into account
-    the explicit setting on that request, and the setting in the session. If a
-    setting is a dictionary, they will be merged together using `dict_class`
-    """
-
-    if session_setting is None:
-        return request_setting
-
-    if request_setting is None:
-        return session_setting
-
-    # Bypass if not a dictionary (e.g. verify)
-    if not (
-            isinstance(session_setting, Mapping) and
-            isinstance(request_setting, Mapping)
-    ):
-        return request_setting
-
-    merged_setting = dict_class(to_key_val_list(session_setting))
-    merged_setting.update(to_key_val_list(request_setting))
-
-    # Remove keys that are set to None. Extract keys first to avoid altering
-    # the dictionary during iteration.
-    none_keys = [k for (k, v) in merged_setting.items() if v is None]
-    for key in none_keys:
-        del merged_setting[key]
-
-    return merged_setting
-
-
-def merge_hooks(request_hooks, session_hooks, dict_class=OrderedDict):
-    """Properly merges both requests and session hooks.
-
-    This is necessary because when request_hooks == {'response': []}, the
-    merge breaks Session hooks entirely.
-    """
-    if session_hooks is None or session_hooks.get('response') == []:
-        return request_hooks
-
-    if request_hooks is None or request_hooks.get('response') == []:
-        return session_hooks
-
-    return merge_setting(request_hooks, session_hooks, dict_class)
-
-
-class SessionRedirectMixin(object):
-
-    def get_redirect_target(self, resp):
-        """Receives a Response. Returns a redirect URI or ``None``"""
-        # Due to the nature of how requests processes redirects this method will
-        # be called at least once upon the original response and at least twice
-        # on each subsequent redirect response (if any).
-        # If a custom mixin is used to handle this logic, it may be advantageous
-        # to cache the redirect location onto the response object as a private
-        # attribute.
-        if resp.is_redirect:
-            location = resp.headers['location']
-            # Currently the underlying http module on py3 decode headers
-            # in latin1, but empirical evidence suggests that latin1 is very
-            # rarely used with non-ASCII characters in HTTP headers.
-            # It is more likely to get UTF8 header rather than latin1.
-            # This causes incorrect handling of UTF8 encoded location headers.
-            # To solve this, we re-encode the location in latin1.
-            if is_py3:
-                location = location.encode('latin1')
-            return to_native_string(location, 'utf8')
-        return None
-
-    def should_strip_auth(self, old_url, new_url):
-        """Decide whether Authorization header should be removed when redirecting"""
-        old_parsed = urlparse(old_url)
-        new_parsed = urlparse(new_url)
-        if old_parsed.hostname != new_parsed.hostname:
-            return True
-        # Special case: allow http -> https redirect when using the standard
-        # ports. This isn't specified by RFC 7235, but is kept to avoid
-        # breaking backwards compatibility with older versions of requests
-        # that allowed any redirects on the same host.
-        if (old_parsed.scheme == 'http' and old_parsed.port in (80, None)
-                and new_parsed.scheme == 'https' and new_parsed.port in (443, None)):
-            return False
-
-        # Handle default port usage corresponding to scheme.
-        changed_port = old_parsed.port != new_parsed.port
-        changed_scheme = old_parsed.scheme != new_parsed.scheme
-        default_port = (DEFAULT_PORTS.get(old_parsed.scheme, None), None)
-        if (not changed_scheme and old_parsed.port in default_port
-                and new_parsed.port in default_port):
-            return False
-
-        # Standard case: root URI must match
-        return changed_port or changed_scheme
-
-    def resolve_redirects(self, resp, req, stream=False, timeout=None,
-                          verify=True, cert=None, proxies=None, yield_requests=False, **adapter_kwargs):
-        """Receives a Response. Returns a generator of Responses or Requests."""
-
-        hist = []  # keep track of history
-
-        url = self.get_redirect_target(resp)
-        previous_fragment = urlparse(req.url).fragment
-        while url:
-            prepared_request = req.copy()
-
-            # Update history and keep track of redirects.
-            # resp.history must ignore the original request in this loop
-            hist.append(resp)
-            resp.history = hist[1:]
-
-            try:
-                resp.content  # Consume socket so it can be released
-            except (ChunkedEncodingError, ContentDecodingError, RuntimeError):
-                resp.raw.read(decode_content=False)
-
-            if len(resp.history) >= self.max_redirects:
-                raise TooManyRedirects('Exceeded %s redirects.' % self.max_redirects, response=resp)
-
-            # Release the connection back into the pool.
-            resp.close()
-
-            # Handle redirection without scheme (see: RFC 1808 Section 4)
-            if url.startswith('//'):
-                parsed_rurl = urlparse(resp.url)
-                url = '%s:%s' % (to_native_string(parsed_rurl.scheme), url)
-
-            # Normalize url case and attach previous fragment if needed (RFC 7231 7.1.2)
-            parsed = urlparse(url)
-            if parsed.fragment == '' and previous_fragment:
-                parsed = parsed._replace(fragment=previous_fragment)
-            elif parsed.fragment:
-                previous_fragment = parsed.fragment
-            url = parsed.geturl()
-
-            # Facilitate relative 'location' headers, as allowed by RFC 7231.
-            # (e.g. '/path/to/resource' instead of 'http://domain.tld/path/to/resource')
-            # Compliant with RFC3986, we percent encode the url.
-            if not parsed.netloc:
-                url = urljoin(resp.url, requote_uri(url))
-            else:
-                url = requote_uri(url)
-
-            prepared_request.url = to_native_string(url)
-
-            self.rebuild_method(prepared_request, resp)
-
-            # https://github.com/requests/requests/issues/1084
-            if resp.status_code not in (codes.temporary_redirect, codes.permanent_redirect):
-                # https://github.com/requests/requests/issues/3490
-                purged_headers = ('Content-Length', 'Content-Type', 'Transfer-Encoding')
-                for header in purged_headers:
-                    prepared_request.headers.pop(header, None)
-                prepared_request.body = None
-
-            headers = prepared_request.headers
-            try:
-                del headers['Cookie']
-            except KeyError:
-                pass
-
-            # Extract any cookies sent on the response to the cookiejar
-            # in the new request. Because we've mutated our copied prepared
-            # request, use the old one that we haven't yet touched.
-            extract_cookies_to_jar(prepared_request._cookies, req, resp.raw)
-            merge_cookies(prepared_request._cookies, self.cookies)
-            prepared_request.prepare_cookies(prepared_request._cookies)
-
-            # Rebuild auth and proxy information.
-            proxies = self.rebuild_proxies(prepared_request, proxies)
-            self.rebuild_auth(prepared_request, resp)
-
-            # A failed tell() sets `_body_position` to `object()`. This non-None
-            # value ensures `rewindable` will be True, allowing us to raise an
-            # UnrewindableBodyError, instead of hanging the connection.
-            rewindable = (
-                prepared_request._body_position is not None and
-                ('Content-Length' in headers or 'Transfer-Encoding' in headers)
-            )
-
-            # Attempt to rewind consumed file-like object.
-            if rewindable:
-                rewind_body(prepared_request)
-
-            # Override the original request.
-            req = prepared_request
-
-            if yield_requests:
-                yield req
-            else:
-
-                resp = self.send(
-                    req,
-                    stream=stream,
-                    timeout=timeout,
-                    verify=verify,
-                    cert=cert,
-                    proxies=proxies,
-                    allow_redirects=False,
-                    **adapter_kwargs
-                )
-
-                extract_cookies_to_jar(self.cookies, prepared_request, resp.raw)
-
-                # extract redirect url, if any, for the next loop
-                url = self.get_redirect_target(resp)
-                yield resp
-
-    def rebuild_auth(self, prepared_request, response):
-        """When being redirected we may want to strip authentication from the
-        request to avoid leaking credentials. This method intelligently removes
-        and reapplies authentication where possible to avoid credential loss.
-        """
-        headers = prepared_request.headers
-        url = prepared_request.url
-
-        if 'Authorization' in headers and self.should_strip_auth(response.request.url, url):
-            # If we get redirected to a new host, we should strip out any
-            # authentication headers.
-            del headers['Authorization']
-
-        # .netrc might have more auth for us on our new host.
-        new_auth = get_netrc_auth(url) if self.trust_env else None
-        if new_auth is not None:
-            prepared_request.prepare_auth(new_auth)
-
-        return
-
-    def rebuild_proxies(self, prepared_request, proxies):
-        """This method re-evaluates the proxy configuration by considering the
-        environment variables. If we are redirected to a URL covered by
-        NO_PROXY, we strip the proxy configuration. Otherwise, we set missing
-        proxy keys for this URL (in case they were stripped by a previous
-        redirect).
-
-        This method also replaces the Proxy-Authorization header where
-        necessary.
-
-        :rtype: dict
-        """
-        proxies = proxies if proxies is not None else {}
-        headers = prepared_request.headers
-        url = prepared_request.url
-        scheme = urlparse(url).scheme
-        new_proxies = proxies.copy()
-        no_proxy = proxies.get('no_proxy')
-
-        bypass_proxy = should_bypass_proxies(url, no_proxy=no_proxy)
-        if self.trust_env and not bypass_proxy:
-            environ_proxies = get_environ_proxies(url, no_proxy=no_proxy)
-
-            proxy = environ_proxies.get(scheme, environ_proxies.get('all'))
-
-            if proxy:
-                new_proxies.setdefault(scheme, proxy)
-
-        if 'Proxy-Authorization' in headers:
-            del headers['Proxy-Authorization']
-
-        try:
-            username, password = get_auth_from_url(new_proxies[scheme])
-        except KeyError:
-            username, password = None, None
-
-        if username and password:
-            headers['Proxy-Authorization'] = _basic_auth_str(username, password)
-
-        return new_proxies
-
-    def rebuild_method(self, prepared_request, response):
-        """When being redirected we may want to change the method of the request
-        based on certain specs or browser behavior.
-        """
-        method = prepared_request.method
-
-        # https://tools.ietf.org/html/rfc7231#section-6.4.4
-        if response.status_code == codes.see_other and method != 'HEAD':
-            method = 'GET'
-
-        # Do what the browsers do, despite standards...
-        # First, turn 302s into GETs.
-        if response.status_code == codes.found and method != 'HEAD':
-            method = 'GET'
-
-        # Second, if a POST is responded to with a 301, turn it into a GET.
-        # This bizarre behaviour is explained in Issue 1704.
-        if response.status_code == codes.moved and method == 'POST':
-            method = 'GET'
-
-        prepared_request.method = method
-
-
-class Session(SessionRedirectMixin):
-    """A Requests session.
-
-    Provides cookie persistence, connection-pooling, and configuration.
-
-    Basic Usage::
-
-      >>> import requests
-      >>> s = requests.Session()
-      >>> s.get('https://httpbin.org/get')
-      <Response [200]>
-
-    Or as a context manager::
-
-      >>> with requests.Session() as s:
-      >>>     s.get('https://httpbin.org/get')
-      <Response [200]>
-    """
-
-    __attrs__ = [
-        'headers', 'cookies', 'auth', 'proxies', 'hooks', 'params', 'verify',
-        'cert', 'prefetch', 'adapters', 'stream', 'trust_env',
-        'max_redirects',
-    ]
-
-    def __init__(self):
-
-        #: A case-insensitive dictionary of headers to be sent on each
-        #: :class:`Request <Request>` sent from this
-        #: :class:`Session <Session>`.
-        self.headers = default_headers()
-
-        #: Default Authentication tuple or object to attach to
-        #: :class:`Request <Request>`.
-        self.auth = None
-
-        #: Dictionary mapping protocol or protocol and host to the URL of the proxy
-        #: (e.g. {'http': 'foo.bar:3128', 'http://host.name': 'foo.bar:4012'}) to
-        #: be used on each :class:`Request <Request>`.
-        self.proxies = {}
-
-        #: Event-handling hooks.
-        self.hooks = default_hooks()
-
-        #: Dictionary of querystring data to attach to each
-        #: :class:`Request <Request>`. The dictionary values may be lists for
-        #: representing multivalued query parameters.
-        self.params = {}
-
-        #: Stream response content default.
-        self.stream = False
-
-        #: SSL Verification default.
-        self.verify = True
-
-        #: SSL client certificate default, if String, path to ssl client
-        #: cert file (.pem). If Tuple, ('cert', 'key') pair.
-        self.cert = None
-
-        #: Maximum number of redirects allowed. If the request exceeds this
-        #: limit, a :class:`TooManyRedirects` exception is raised.
-        #: This defaults to requests.models.DEFAULT_REDIRECT_LIMIT, which is
-        #: 30.
-        self.max_redirects = DEFAULT_REDIRECT_LIMIT
-
-        #: Trust environment settings for proxy configuration, default
-        #: authentication and similar.
-        self.trust_env = True
-
-        #: A CookieJar containing all currently outstanding cookies set on this
-        #: session. By default it is a
-        #: :class:`RequestsCookieJar <requests.cookies.RequestsCookieJar>`, but
-        #: may be any other ``cookielib.CookieJar`` compatible object.
-        self.cookies = cookiejar_from_dict({})
-
-        # Default connection adapters.
-        self.adapters = OrderedDict()
-        self.mount('https://', HTTPAdapter())
-        self.mount('http://', HTTPAdapter())
-
-    def __enter__(self):
-        return self
-
-    def __exit__(self, *args):
-        self.close()
-
-    def prepare_request(self, request):
-        """Constructs a :class:`PreparedRequest <PreparedRequest>` for
-        transmission and returns it. The :class:`PreparedRequest` has settings
-        merged from the :class:`Request <Request>` instance and those of the
-        :class:`Session`.
-
-        :param request: :class:`Request` instance to prepare with this
-            session's settings.
-        :rtype: requests.PreparedRequest
-        """
-        cookies = request.cookies or {}
-
-        # Bootstrap CookieJar.
-        if not isinstance(cookies, cookielib.CookieJar):
-            cookies = cookiejar_from_dict(cookies)
-
-        # Merge with session cookies
-        merged_cookies = merge_cookies(
-            merge_cookies(RequestsCookieJar(), self.cookies), cookies)
-
-        # Set environment's basic authentication if not explicitly set.
-        auth = request.auth
-        if self.trust_env and not auth and not self.auth:
-            auth = get_netrc_auth(request.url)
-
-        p = PreparedRequest()
-        p.prepare(
-            method=request.method.upper(),
-            url=request.url,
-            files=request.files,
-            data=request.data,
-            json=request.json,
-            headers=merge_setting(request.headers, self.headers, dict_class=CaseInsensitiveDict),
-            params=merge_setting(request.params, self.params),
-            auth=merge_setting(auth, self.auth),
-            cookies=merged_cookies,
-            hooks=merge_hooks(request.hooks, self.hooks),
-        )
-        return p
-
-    def request(self, method, url,
-            params=None, data=None, headers=None, cookies=None, files=None,
-            auth=None, timeout=None, allow_redirects=True, proxies=None,
-            hooks=None, stream=None, verify=None, cert=None, json=None):
-        """Constructs a :class:`Request <Request>`, prepares it and sends it.
-        Returns :class:`Response <Response>` object.
-
-        :param method: method for the new :class:`Request` object.
-        :param url: URL for the new :class:`Request` object.
-        :param params: (optional) Dictionary or bytes to be sent in the query
-            string for the :class:`Request`.
-        :param data: (optional) Dictionary, list of tuples, bytes, or file-like
-            object to send in the body of the :class:`Request`.
-        :param json: (optional) json to send in the body of the
-            :class:`Request`.
-        :param headers: (optional) Dictionary of HTTP Headers to send with the
-            :class:`Request`.
-        :param cookies: (optional) Dict or CookieJar object to send with the
-            :class:`Request`.
-        :param files: (optional) Dictionary of ``'filename': file-like-objects``
-            for multipart encoding upload.
-        :param auth: (optional) Auth tuple or callable to enable
-            Basic/Digest/Custom HTTP Auth.
-        :param timeout: (optional) How long to wait for the server to send
-            data before giving up, as a float, or a :ref:`(connect timeout,
-            read timeout) <timeouts>` tuple.
-        :type timeout: float or tuple
-        :param allow_redirects: (optional) Set to True by default.
-        :type allow_redirects: bool
-        :param proxies: (optional) Dictionary mapping protocol or protocol and
-            hostname to the URL of the proxy.
-        :param stream: (optional) whether to immediately download the response
-            content. Defaults to ``False``.
-        :param verify: (optional) Either a boolean, in which case it controls whether we verify
-            the server's TLS certificate, or a string, in which case it must be a path
-            to a CA bundle to use. Defaults to ``True``.
-        :param cert: (optional) if String, path to ssl client cert file (.pem).
-            If Tuple, ('cert', 'key') pair.
-        :rtype: requests.Response
-        """
-        # Create the Request.
-        req = Request(
-            method=method.upper(),
-            url=url,
-            headers=headers,
-            files=files,
-            data=data or {},
-            json=json,
-            params=params or {},
-            auth=auth,
-            cookies=cookies,
-            hooks=hooks,
-        )
-        prep = self.prepare_request(req)
-
-        proxies = proxies or {}
-
-        settings = self.merge_environment_settings(
-            prep.url, proxies, stream, verify, cert
-        )
-
-        # Send the request.
-        send_kwargs = {
-            'timeout': timeout,
-            'allow_redirects': allow_redirects,
-        }
-        send_kwargs.update(settings)
-        resp = self.send(prep, **send_kwargs)
-
-        return resp
-
-    def get(self, url, **kwargs):
-        r"""Sends a GET request. Returns :class:`Response` object.
-
-        :param url: URL for the new :class:`Request` object.
-        :param \*\*kwargs: Optional arguments that ``request`` takes.
-        :rtype: requests.Response
-        """
-
-        kwargs.setdefault('allow_redirects', True)
-        return self.request('GET', url, **kwargs)
-
-    def options(self, url, **kwargs):
-        r"""Sends a OPTIONS request. Returns :class:`Response` object.
-
-        :param url: URL for the new :class:`Request` object.
-        :param \*\*kwargs: Optional arguments that ``request`` takes.
-        :rtype: requests.Response
-        """
-
-        kwargs.setdefault('allow_redirects', True)
-        return self.request('OPTIONS', url, **kwargs)
-
-    def head(self, url, **kwargs):
-        r"""Sends a HEAD request. Returns :class:`Response` object.
-
-        :param url: URL for the new :class:`Request` object.
-        :param \*\*kwargs: Optional arguments that ``request`` takes.
-        :rtype: requests.Response
-        """
-
-        kwargs.setdefault('allow_redirects', False)
-        return self.request('HEAD', url, **kwargs)
-
-    def post(self, url, data=None, json=None, **kwargs):
-        r"""Sends a POST request. Returns :class:`Response` object.
-
-        :param url: URL for the new :class:`Request` object.
-        :param data: (optional) Dictionary, list of tuples, bytes, or file-like
-            object to send in the body of the :class:`Request`.
-        :param json: (optional) json to send in the body of the :class:`Request`.
-        :param \*\*kwargs: Optional arguments that ``request`` takes.
-        :rtype: requests.Response
-        """
-
-        return self.request('POST', url, data=data, json=json, **kwargs)
-
-    def put(self, url, data=None, **kwargs):
-        r"""Sends a PUT request. Returns :class:`Response` object.
-
-        :param url: URL for the new :class:`Request` object.
-        :param data: (optional) Dictionary, list of tuples, bytes, or file-like
-            object to send in the body of the :class:`Request`.
-        :param \*\*kwargs: Optional arguments that ``request`` takes.
-        :rtype: requests.Response
-        """
-
-        return self.request('PUT', url, data=data, **kwargs)
-
-    def patch(self, url, data=None, **kwargs):
-        r"""Sends a PATCH request. Returns :class:`Response` object.
-
-        :param url: URL for the new :class:`Request` object.
-        :param data: (optional) Dictionary, list of tuples, bytes, or file-like
-            object to send in the body of the :class:`Request`.
-        :param \*\*kwargs: Optional arguments that ``request`` takes.
-        :rtype: requests.Response
-        """
-
-        return self.request('PATCH', url, data=data, **kwargs)
-
-    def delete(self, url, **kwargs):
-        r"""Sends a DELETE request. Returns :class:`Response` object.
-
-        :param url: URL for the new :class:`Request` object.
-        :param \*\*kwargs: Optional arguments that ``request`` takes.
-        :rtype: requests.Response
-        """
-
-        return self.request('DELETE', url, **kwargs)
-
-    def send(self, request, **kwargs):
-        """Send a given PreparedRequest.
-
-        :rtype: requests.Response
-        """
-        # Set defaults that the hooks can utilize to ensure they always have
-        # the correct parameters to reproduce the previous request.
-        kwargs.setdefault('stream', self.stream)
-        kwargs.setdefault('verify', self.verify)
-        kwargs.setdefault('cert', self.cert)
-        kwargs.setdefault('proxies', self.proxies)
-
-        # It's possible that users might accidentally send a Request object.
-        # Guard against that specific failure case.
-        if isinstance(request, Request):
-            raise ValueError('You can only send PreparedRequests.')
-
-        # Set up variables needed for resolve_redirects and dispatching of hooks
-        allow_redirects = kwargs.pop('allow_redirects', True)
-        stream = kwargs.get('stream')
-        hooks = request.hooks
-
-        # Get the appropriate adapter to use
-        adapter = self.get_adapter(url=request.url)
-
-        # Start time (approximately) of the request
-        start = preferred_clock()
-
-        # Send the request
-        r = adapter.send(request, **kwargs)
-
-        # Total elapsed time of the request (approximately)
-        elapsed = preferred_clock() - start
-        r.elapsed = timedelta(seconds=elapsed)
-
-        # Response manipulation hooks
-        r = dispatch_hook('response', hooks, r, **kwargs)
-
-        # Persist cookies
-        if r.history:
-
-            # If the hooks create history then we want those cookies too
-            for resp in r.history:
-                extract_cookies_to_jar(self.cookies, resp.request, resp.raw)
-
-        extract_cookies_to_jar(self.cookies, request, r.raw)
-
-        # Redirect resolving generator.
-        gen = self.resolve_redirects(r, request, **kwargs)
-
-        # Resolve redirects if allowed.
-        history = [resp for resp in gen] if allow_redirects else []
-
-        # Shuffle things around if there's history.
-        if history:
-            # Insert the first (original) request at the start
-            history.insert(0, r)
-            # Get the last request made
-            r = history.pop()
-            r.history = history
-
-        # If redirects aren't being followed, store the response on the Request for Response.next().
-        if not allow_redirects:
-            try:
-                r._next = next(self.resolve_redirects(r, request, yield_requests=True, **kwargs))
-            except StopIteration:
-                pass
-
-        if not stream:
-            r.content
-
-        return r
-
-    def merge_environment_settings(self, url, proxies, stream, verify, cert):
-        """
-        Check the environment and merge it with some settings.
-
-        :rtype: dict
-        """
-        # Gather clues from the surrounding environment.
-        if self.trust_env:
-            # Set environment's proxies.
-            no_proxy = proxies.get('no_proxy') if proxies is not None else None
-            env_proxies = get_environ_proxies(url, no_proxy=no_proxy)
-            for (k, v) in env_proxies.items():
-                proxies.setdefault(k, v)
-
-            # Look for requests environment configuration and be compatible
-            # with cURL.
-            if verify is True or verify is None:
-                verify = (os.environ.get('REQUESTS_CA_BUNDLE') or
-                          os.environ.get('CURL_CA_BUNDLE'))
-
-        # Merge all the kwargs.
-        proxies = merge_setting(proxies, self.proxies)
-        stream = merge_setting(stream, self.stream)
-        verify = merge_setting(verify, self.verify)
-        cert = merge_setting(cert, self.cert)
-
-        return {'verify': verify, 'proxies': proxies, 'stream': stream,
-                'cert': cert}
-
-    def get_adapter(self, url):
-        """
-        Returns the appropriate connection adapter for the given URL.
-
-        :rtype: requests.adapters.BaseAdapter
-        """
-        for (prefix, adapter) in self.adapters.items():
-
-            if url.lower().startswith(prefix.lower()):
-                return adapter
-
-        # Nothing matches :-/
-        raise InvalidSchema("No connection adapters were found for '%s'" % url)
-
-    def close(self):
-        """Closes all adapters and as such the session"""
-        for v in self.adapters.values():
-            v.close()
-
-    def mount(self, prefix, adapter):
-        """Registers a connection adapter to a prefix.
-
-        Adapters are sorted in descending order by prefix length.
-        """
-        self.adapters[prefix] = adapter
-        keys_to_move = [k for k in self.adapters if len(k) < len(prefix)]
-
-        for key in keys_to_move:
-            self.adapters[key] = self.adapters.pop(key)
-
-    def __getstate__(self):
-        state = {attr: getattr(self, attr, None) for attr in self.__attrs__}
-        return state
-
-    def __setstate__(self, state):
-        for attr, value in state.items():
-            setattr(self, attr, value)
-
-
-def session():
-    """
-    Returns a :class:`Session` for context-management.
-
-    .. deprecated:: 1.0.0
-
-        This method has been deprecated since version 1.0.0 and is only kept for
-        backwards compatibility. New code should use :class:`~requests.sessions.Session`
-        to create a session. This may be removed at a future date.
-
-    :rtype: Session
-    """
-    return Session()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/status_codes.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/status_codes.py
deleted file mode 100644
index 813e8c4..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/status_codes.py
+++ /dev/null
@@ -1,120 +0,0 @@
-# -*- coding: utf-8 -*-
-
-r"""
-The ``codes`` object defines a mapping from common names for HTTP statuses
-to their numerical codes, accessible either as attributes or as dictionary
-items.
-
->>> requests.codes['temporary_redirect']
-307
->>> requests.codes.teapot
-418
->>> requests.codes['\o/']
-200
-
-Some codes have multiple names, and both upper- and lower-case versions of
-the names are allowed. For example, ``codes.ok``, ``codes.OK``, and
-``codes.okay`` all correspond to the HTTP status code 200.
-"""
-
-from .structures import LookupDict
-
-_codes = {
-
-    # Informational.
-    100: ('continue',),
-    101: ('switching_protocols',),
-    102: ('processing',),
-    103: ('checkpoint',),
-    122: ('uri_too_long', 'request_uri_too_long'),
-    200: ('ok', 'okay', 'all_ok', 'all_okay', 'all_good', '\\o/', '✓'),
-    201: ('created',),
-    202: ('accepted',),
-    203: ('non_authoritative_info', 'non_authoritative_information'),
-    204: ('no_content',),
-    205: ('reset_content', 'reset'),
-    206: ('partial_content', 'partial'),
-    207: ('multi_status', 'multiple_status', 'multi_stati', 'multiple_stati'),
-    208: ('already_reported',),
-    226: ('im_used',),
-
-    # Redirection.
-    300: ('multiple_choices',),
-    301: ('moved_permanently', 'moved', '\\o-'),
-    302: ('found',),
-    303: ('see_other', 'other'),
-    304: ('not_modified',),
-    305: ('use_proxy',),
-    306: ('switch_proxy',),
-    307: ('temporary_redirect', 'temporary_moved', 'temporary'),
-    308: ('permanent_redirect',
-          'resume_incomplete', 'resume',),  # These 2 to be removed in 3.0
-
-    # Client Error.
-    400: ('bad_request', 'bad'),
-    401: ('unauthorized',),
-    402: ('payment_required', 'payment'),
-    403: ('forbidden',),
-    404: ('not_found', '-o-'),
-    405: ('method_not_allowed', 'not_allowed'),
-    406: ('not_acceptable',),
-    407: ('proxy_authentication_required', 'proxy_auth', 'proxy_authentication'),
-    408: ('request_timeout', 'timeout'),
-    409: ('conflict',),
-    410: ('gone',),
-    411: ('length_required',),
-    412: ('precondition_failed', 'precondition'),
-    413: ('request_entity_too_large',),
-    414: ('request_uri_too_large',),
-    415: ('unsupported_media_type', 'unsupported_media', 'media_type'),
-    416: ('requested_range_not_satisfiable', 'requested_range', 'range_not_satisfiable'),
-    417: ('expectation_failed',),
-    418: ('im_a_teapot', 'teapot', 'i_am_a_teapot'),
-    421: ('misdirected_request',),
-    422: ('unprocessable_entity', 'unprocessable'),
-    423: ('locked',),
-    424: ('failed_dependency', 'dependency'),
-    425: ('unordered_collection', 'unordered'),
-    426: ('upgrade_required', 'upgrade'),
-    428: ('precondition_required', 'precondition'),
-    429: ('too_many_requests', 'too_many'),
-    431: ('header_fields_too_large', 'fields_too_large'),
-    444: ('no_response', 'none'),
-    449: ('retry_with', 'retry'),
-    450: ('blocked_by_windows_parental_controls', 'parental_controls'),
-    451: ('unavailable_for_legal_reasons', 'legal_reasons'),
-    499: ('client_closed_request',),
-
-    # Server Error.
-    500: ('internal_server_error', 'server_error', '/o\\', '✗'),
-    501: ('not_implemented',),
-    502: ('bad_gateway',),
-    503: ('service_unavailable', 'unavailable'),
-    504: ('gateway_timeout',),
-    505: ('http_version_not_supported', 'http_version'),
-    506: ('variant_also_negotiates',),
-    507: ('insufficient_storage',),
-    509: ('bandwidth_limit_exceeded', 'bandwidth'),
-    510: ('not_extended',),
-    511: ('network_authentication_required', 'network_auth', 'network_authentication'),
-}
-
-codes = LookupDict(name='status_codes')
-
-def _init():
-    for code, titles in _codes.items():
-        for title in titles:
-            setattr(codes, title, code)
-            if not title.startswith(('\\', '/')):
-                setattr(codes, title.upper(), code)
-
-    def doc(code):
-        names = ', '.join('``%s``' % n for n in _codes[code])
-        return '* %d: %s' % (code, names)
-
-    global __doc__
-    __doc__ = (__doc__ + '\n' +
-               '\n'.join(doc(code) for code in sorted(_codes))
-               if __doc__ is not None else None)
-
-_init()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/structures.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/structures.py
deleted file mode 100644
index da930e2..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/structures.py
+++ /dev/null
@@ -1,103 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-requests.structures
-~~~~~~~~~~~~~~~~~~~
-
-Data structures that power Requests.
-"""
-
-from .compat import OrderedDict, Mapping, MutableMapping
-
-
-class CaseInsensitiveDict(MutableMapping):
-    """A case-insensitive ``dict``-like object.
-
-    Implements all methods and operations of
-    ``MutableMapping`` as well as dict's ``copy``. Also
-    provides ``lower_items``.
-
-    All keys are expected to be strings. The structure remembers the
-    case of the last key to be set, and ``iter(instance)``,
-    ``keys()``, ``items()``, ``iterkeys()``, and ``iteritems()``
-    will contain case-sensitive keys. However, querying and contains
-    testing is case insensitive::
-
-        cid = CaseInsensitiveDict()
-        cid['Accept'] = 'application/json'
-        cid['aCCEPT'] == 'application/json'  # True
-        list(cid) == ['Accept']  # True
-
-    For example, ``headers['content-encoding']`` will return the
-    value of a ``'Content-Encoding'`` response header, regardless
-    of how the header name was originally stored.
-
-    If the constructor, ``.update``, or equality comparison
-    operations are given keys that have equal ``.lower()``s, the
-    behavior is undefined.
-    """
-
-    def __init__(self, data=None, **kwargs):
-        self._store = OrderedDict()
-        if data is None:
-            data = {}
-        self.update(data, **kwargs)
-
-    def __setitem__(self, key, value):
-        # Use the lowercased key for lookups, but store the actual
-        # key alongside the value.
-        self._store[key.lower()] = (key, value)
-
-    def __getitem__(self, key):
-        return self._store[key.lower()][1]
-
-    def __delitem__(self, key):
-        del self._store[key.lower()]
-
-    def __iter__(self):
-        return (casedkey for casedkey, mappedvalue in self._store.values())
-
-    def __len__(self):
-        return len(self._store)
-
-    def lower_items(self):
-        """Like iteritems(), but with all lowercase keys."""
-        return (
-            (lowerkey, keyval[1])
-            for (lowerkey, keyval)
-            in self._store.items()
-        )
-
-    def __eq__(self, other):
-        if isinstance(other, Mapping):
-            other = CaseInsensitiveDict(other)
-        else:
-            return NotImplemented
-        # Compare insensitively
-        return dict(self.lower_items()) == dict(other.lower_items())
-
-    # Copy is required
-    def copy(self):
-        return CaseInsensitiveDict(self._store.values())
-
-    def __repr__(self):
-        return str(dict(self.items()))
-
-
-class LookupDict(dict):
-    """Dictionary lookup object."""
-
-    def __init__(self, name=None):
-        self.name = name
-        super(LookupDict, self).__init__()
-
-    def __repr__(self):
-        return '<lookup \'%s\'>' % (self.name)
-
-    def __getitem__(self, key):
-        # We allow fall-through here, so values default to None
-
-        return self.__dict__.get(key, None)
-
-    def get(self, key, default=None):
-        return self.__dict__.get(key, default)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/utils.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/utils.py
deleted file mode 100644
index 8170a8d..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/requests/utils.py
+++ /dev/null
@@ -1,977 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-requests.utils
-~~~~~~~~~~~~~~
-
-This module provides utility functions that are used within Requests
-that are also useful for external consumption.
-"""
-
-import codecs
-import contextlib
-import io
-import os
-import re
-import socket
-import struct
-import sys
-import tempfile
-import warnings
-import zipfile
-
-from .__version__ import __version__
-from . import certs
-# to_native_string is unused here, but imported here for backwards compatibility
-from ._internal_utils import to_native_string
-from .compat import parse_http_list as _parse_list_header
-from .compat import (
-    quote, urlparse, bytes, str, OrderedDict, unquote, getproxies,
-    proxy_bypass, urlunparse, basestring, integer_types, is_py3,
-    proxy_bypass_environment, getproxies_environment, Mapping)
-from .cookies import cookiejar_from_dict
-from .structures import CaseInsensitiveDict
-from .exceptions import (
-    InvalidURL, InvalidHeader, FileModeWarning, UnrewindableBodyError)
-
-NETRC_FILES = ('.netrc', '_netrc')
-
-DEFAULT_CA_BUNDLE_PATH = certs.where()
-
-DEFAULT_PORTS = {'http': 80, 'https': 443}
-
-
-if sys.platform == 'win32':
-    # provide a proxy_bypass version on Windows without DNS lookups
-
-    def proxy_bypass_registry(host):
-        try:
-            if is_py3:
-                import winreg
-            else:
-                import _winreg as winreg
-        except ImportError:
-            return False
-
-        try:
-            internetSettings = winreg.OpenKey(winreg.HKEY_CURRENT_USER,
-                r'Software\Microsoft\Windows\CurrentVersion\Internet Settings')
-            # ProxyEnable could be REG_SZ or REG_DWORD, normalizing it
-            proxyEnable = int(winreg.QueryValueEx(internetSettings,
-                                              'ProxyEnable')[0])
-            # ProxyOverride is almost always a string
-            proxyOverride = winreg.QueryValueEx(internetSettings,
-                                                'ProxyOverride')[0]
-        except OSError:
-            return False
-        if not proxyEnable or not proxyOverride:
-            return False
-
-        # make a check value list from the registry entry: replace the
-        # '<local>' string by the localhost entry and the corresponding
-        # canonical entry.
-        proxyOverride = proxyOverride.split(';')
-        # now check if we match one of the registry values.
-        for test in proxyOverride:
-            if test == '<local>':
-                if '.' not in host:
-                    return True
-            test = test.replace(".", r"\.")     # mask dots
-            test = test.replace("*", r".*")     # change glob sequence
-            test = test.replace("?", r".")      # change glob char
-            if re.match(test, host, re.I):
-                return True
-        return False
-
-    def proxy_bypass(host):  # noqa
-        """Return True, if the host should be bypassed.
-
-        Checks proxy settings gathered from the environment, if specified,
-        or the registry.
-        """
-        if getproxies_environment():
-            return proxy_bypass_environment(host)
-        else:
-            return proxy_bypass_registry(host)
-
-
-def dict_to_sequence(d):
-    """Returns an internal sequence dictionary update."""
-
-    if hasattr(d, 'items'):
-        d = d.items()
-
-    return d
-
-
-def super_len(o):
-    total_length = None
-    current_position = 0
-
-    if hasattr(o, '__len__'):
-        total_length = len(o)
-
-    elif hasattr(o, 'len'):
-        total_length = o.len
-
-    elif hasattr(o, 'fileno'):
-        try:
-            fileno = o.fileno()
-        except io.UnsupportedOperation:
-            pass
-        else:
-            total_length = os.fstat(fileno).st_size
-
-            # Having used fstat to determine the file length, we need to
-            # confirm that this file was opened up in binary mode.
-            if 'b' not in o.mode:
-                warnings.warn((
-                    "Requests has determined the content-length for this "
-                    "request using the binary size of the file: however, the "
-                    "file has been opened in text mode (i.e. without the 'b' "
-                    "flag in the mode). This may lead to an incorrect "
-                    "content-length. In Requests 3.0, support will be removed "
-                    "for files in text mode."),
-                    FileModeWarning
-                )
-
-    if hasattr(o, 'tell'):
-        try:
-            current_position = o.tell()
-        except (OSError, IOError):
-            # This can happen in some weird situations, such as when the file
-            # is actually a special file descriptor like stdin. In this
-            # instance, we don't know what the length is, so set it to zero and
-            # let requests chunk it instead.
-            if total_length is not None:
-                current_position = total_length
-        else:
-            if hasattr(o, 'seek') and total_length is None:
-                # StringIO and BytesIO have seek but no useable fileno
-                try:
-                    # seek to end of file
-                    o.seek(0, 2)
-                    total_length = o.tell()
-
-                    # seek back to current position to support
-                    # partially read file-like objects
-                    o.seek(current_position or 0)
-                except (OSError, IOError):
-                    total_length = 0
-
-    if total_length is None:
-        total_length = 0
-
-    return max(0, total_length - current_position)
-
-
-def get_netrc_auth(url, raise_errors=False):
-    """Returns the Requests tuple auth for a given url from netrc."""
-
-    try:
-        from netrc import netrc, NetrcParseError
-
-        netrc_path = None
-
-        for f in NETRC_FILES:
-            try:
-                loc = os.path.expanduser('~/{}'.format(f))
-            except KeyError:
-                # os.path.expanduser can fail when $HOME is undefined and
-                # getpwuid fails. See https://bugs.python.org/issue20164 &
-                # https://github.com/requests/requests/issues/1846
-                return
-
-            if os.path.exists(loc):
-                netrc_path = loc
-                break
-
-        # Abort early if there isn't one.
-        if netrc_path is None:
-            return
-
-        ri = urlparse(url)
-
-        # Strip port numbers from netloc. This weird `if...encode`` dance is
-        # used for Python 3.2, which doesn't support unicode literals.
-        splitstr = b':'
-        if isinstance(url, str):
-            splitstr = splitstr.decode('ascii')
-        host = ri.netloc.split(splitstr)[0]
-
-        try:
-            _netrc = netrc(netrc_path).authenticators(host)
-            if _netrc:
-                # Return with login / password
-                login_i = (0 if _netrc[0] else 1)
-                return (_netrc[login_i], _netrc[2])
-        except (NetrcParseError, IOError):
-            # If there was a parsing error or a permissions issue reading the file,
-            # we'll just skip netrc auth unless explicitly asked to raise errors.
-            if raise_errors:
-                raise
-
-    # AppEngine hackiness.
-    except (ImportError, AttributeError):
-        pass
-
-
-def guess_filename(obj):
-    """Tries to guess the filename of the given object."""
-    name = getattr(obj, 'name', None)
-    if (name and isinstance(name, basestring) and name[0] != '<' and
-            name[-1] != '>'):
-        return os.path.basename(name)
-
-
-def extract_zipped_paths(path):
-    """Replace nonexistent paths that look like they refer to a member of a zip
-    archive with the location of an extracted copy of the target, or else
-    just return the provided path unchanged.
-    """
-    if os.path.exists(path):
-        # this is already a valid path, no need to do anything further
-        return path
-
-    # find the first valid part of the provided path and treat that as a zip archive
-    # assume the rest of the path is the name of a member in the archive
-    archive, member = os.path.split(path)
-    while archive and not os.path.exists(archive):
-        archive, prefix = os.path.split(archive)
-        member = '/'.join([prefix, member])
-
-    if not zipfile.is_zipfile(archive):
-        return path
-
-    zip_file = zipfile.ZipFile(archive)
-    if member not in zip_file.namelist():
-        return path
-
-    # we have a valid zip archive and a valid member of that archive
-    tmp = tempfile.gettempdir()
-    extracted_path = os.path.join(tmp, *member.split('/'))
-    if not os.path.exists(extracted_path):
-        extracted_path = zip_file.extract(member, path=tmp)
-
-    return extracted_path
-
-
-def from_key_val_list(value):
-    """Take an object and test to see if it can be represented as a
-    dictionary. Unless it can not be represented as such, return an
-    OrderedDict, e.g.,
-
-    ::
-
-        >>> from_key_val_list([('key', 'val')])
-        OrderedDict([('key', 'val')])
-        >>> from_key_val_list('string')
-        ValueError: cannot encode objects that are not 2-tuples
-        >>> from_key_val_list({'key': 'val'})
-        OrderedDict([('key', 'val')])
-
-    :rtype: OrderedDict
-    """
-    if value is None:
-        return None
-
-    if isinstance(value, (str, bytes, bool, int)):
-        raise ValueError('cannot encode objects that are not 2-tuples')
-
-    return OrderedDict(value)
-
-
-def to_key_val_list(value):
-    """Take an object and test to see if it can be represented as a
-    dictionary. If it can be, return a list of tuples, e.g.,
-
-    ::
-
-        >>> to_key_val_list([('key', 'val')])
-        [('key', 'val')]
-        >>> to_key_val_list({'key': 'val'})
-        [('key', 'val')]
-        >>> to_key_val_list('string')
-        ValueError: cannot encode objects that are not 2-tuples.
-
-    :rtype: list
-    """
-    if value is None:
-        return None
-
-    if isinstance(value, (str, bytes, bool, int)):
-        raise ValueError('cannot encode objects that are not 2-tuples')
-
-    if isinstance(value, Mapping):
-        value = value.items()
-
-    return list(value)
-
-
-# From mitsuhiko/werkzeug (used with permission).
-def parse_list_header(value):
-    """Parse lists as described by RFC 2068 Section 2.
-
-    In particular, parse comma-separated lists where the elements of
-    the list may include quoted-strings.  A quoted-string could
-    contain a comma.  A non-quoted string could have quotes in the
-    middle.  Quotes are removed automatically after parsing.
-
-    It basically works like :func:`parse_set_header` just that items
-    may appear multiple times and case sensitivity is preserved.
-
-    The return value is a standard :class:`list`:
-
-    >>> parse_list_header('token, "quoted value"')
-    ['token', 'quoted value']
-
-    To create a header from the :class:`list` again, use the
-    :func:`dump_header` function.
-
-    :param value: a string with a list header.
-    :return: :class:`list`
-    :rtype: list
-    """
-    result = []
-    for item in _parse_list_header(value):
-        if item[:1] == item[-1:] == '"':
-            item = unquote_header_value(item[1:-1])
-        result.append(item)
-    return result
-
-
-# From mitsuhiko/werkzeug (used with permission).
-def parse_dict_header(value):
-    """Parse lists of key, value pairs as described by RFC 2068 Section 2 and
-    convert them into a python dict:
-
-    >>> d = parse_dict_header('foo="is a fish", bar="as well"')
-    >>> type(d) is dict
-    True
-    >>> sorted(d.items())
-    [('bar', 'as well'), ('foo', 'is a fish')]
-
-    If there is no value for a key it will be `None`:
-
-    >>> parse_dict_header('key_without_value')
-    {'key_without_value': None}
-
-    To create a header from the :class:`dict` again, use the
-    :func:`dump_header` function.
-
-    :param value: a string with a dict header.
-    :return: :class:`dict`
-    :rtype: dict
-    """
-    result = {}
-    for item in _parse_list_header(value):
-        if '=' not in item:
-            result[item] = None
-            continue
-        name, value = item.split('=', 1)
-        if value[:1] == value[-1:] == '"':
-            value = unquote_header_value(value[1:-1])
-        result[name] = value
-    return result
-
-
-# From mitsuhiko/werkzeug (used with permission).
-def unquote_header_value(value, is_filename=False):
-    r"""Unquotes a header value.  (Reversal of :func:`quote_header_value`).
-    This does not use the real unquoting but what browsers are actually
-    using for quoting.
-
-    :param value: the header value to unquote.
-    :rtype: str
-    """
-    if value and value[0] == value[-1] == '"':
-        # this is not the real unquoting, but fixing this so that the
-        # RFC is met will result in bugs with internet explorer and
-        # probably some other browsers as well.  IE for example is
-        # uploading files with "C:\foo\bar.txt" as filename
-        value = value[1:-1]
-
-        # if this is a filename and the starting characters look like
-        # a UNC path, then just return the value without quotes.  Using the
-        # replace sequence below on a UNC path has the effect of turning
-        # the leading double slash into a single slash and then
-        # _fix_ie_filename() doesn't work correctly.  See #458.
-        if not is_filename or value[:2] != '\\\\':
-            return value.replace('\\\\', '\\').replace('\\"', '"')
-    return value
-
-
-def dict_from_cookiejar(cj):
-    """Returns a key/value dictionary from a CookieJar.
-
-    :param cj: CookieJar object to extract cookies from.
-    :rtype: dict
-    """
-
-    cookie_dict = {}
-
-    for cookie in cj:
-        cookie_dict[cookie.name] = cookie.value
-
-    return cookie_dict
-
-
-def add_dict_to_cookiejar(cj, cookie_dict):
-    """Returns a CookieJar from a key/value dictionary.
-
-    :param cj: CookieJar to insert cookies into.
-    :param cookie_dict: Dict of key/values to insert into CookieJar.
-    :rtype: CookieJar
-    """
-
-    return cookiejar_from_dict(cookie_dict, cj)
-
-
-def get_encodings_from_content(content):
-    """Returns encodings from given content string.
-
-    :param content: bytestring to extract encodings from.
-    """
-    warnings.warn((
-        'In requests 3.0, get_encodings_from_content will be removed. For '
-        'more information, please see the discussion on issue #2266. (This'
-        ' warning should only appear once.)'),
-        DeprecationWarning)
-
-    charset_re = re.compile(r'<meta.*?charset=["\']*(.+?)["\'>]', flags=re.I)
-    pragma_re = re.compile(r'<meta.*?content=["\']*;?charset=(.+?)["\'>]', flags=re.I)
-    xml_re = re.compile(r'^<\?xml.*?encoding=["\']*(.+?)["\'>]')
-
-    return (charset_re.findall(content) +
-            pragma_re.findall(content) +
-            xml_re.findall(content))
-
-
-def _parse_content_type_header(header):
-    """Returns content type and parameters from given header
-
-    :param header: string
-    :return: tuple containing content type and dictionary of
-         parameters
-    """
-
-    tokens = header.split(';')
-    content_type, params = tokens[0].strip(), tokens[1:]
-    params_dict = {}
-    items_to_strip = "\"' "
-
-    for param in params:
-        param = param.strip()
-        if param:
-            key, value = param, True
-            index_of_equals = param.find("=")
-            if index_of_equals != -1:
-                key = param[:index_of_equals].strip(items_to_strip)
-                value = param[index_of_equals + 1:].strip(items_to_strip)
-            params_dict[key.lower()] = value
-    return content_type, params_dict
-
-
-def get_encoding_from_headers(headers):
-    """Returns encodings from given HTTP Header Dict.
-
-    :param headers: dictionary to extract encoding from.
-    :rtype: str
-    """
-
-    content_type = headers.get('content-type')
-
-    if not content_type:
-        return None
-
-    content_type, params = _parse_content_type_header(content_type)
-
-    if 'charset' in params:
-        return params['charset'].strip("'\"")
-
-    if 'text' in content_type:
-        return 'ISO-8859-1'
-
-
-def stream_decode_response_unicode(iterator, r):
-    """Stream decodes a iterator."""
-
-    if r.encoding is None:
-        for item in iterator:
-            yield item
-        return
-
-    decoder = codecs.getincrementaldecoder(r.encoding)(errors='replace')
-    for chunk in iterator:
-        rv = decoder.decode(chunk)
-        if rv:
-            yield rv
-    rv = decoder.decode(b'', final=True)
-    if rv:
-        yield rv
-
-
-def iter_slices(string, slice_length):
-    """Iterate over slices of a string."""
-    pos = 0
-    if slice_length is None or slice_length <= 0:
-        slice_length = len(string)
-    while pos < len(string):
-        yield string[pos:pos + slice_length]
-        pos += slice_length
-
-
-def get_unicode_from_response(r):
-    """Returns the requested content back in unicode.
-
-    :param r: Response object to get unicode content from.
-
-    Tried:
-
-    1. charset from content-type
-    2. fall back and replace all unicode characters
-
-    :rtype: str
-    """
-    warnings.warn((
-        'In requests 3.0, get_unicode_from_response will be removed. For '
-        'more information, please see the discussion on issue #2266. (This'
-        ' warning should only appear once.)'),
-        DeprecationWarning)
-
-    tried_encodings = []
-
-    # Try charset from content-type
-    encoding = get_encoding_from_headers(r.headers)
-
-    if encoding:
-        try:
-            return str(r.content, encoding)
-        except UnicodeError:
-            tried_encodings.append(encoding)
-
-    # Fall back:
-    try:
-        return str(r.content, encoding, errors='replace')
-    except TypeError:
-        return r.content
-
-
-# The unreserved URI characters (RFC 3986)
-UNRESERVED_SET = frozenset(
-    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz" + "0123456789-._~")
-
-
-def unquote_unreserved(uri):
-    """Un-escape any percent-escape sequences in a URI that are unreserved
-    characters. This leaves all reserved, illegal and non-ASCII bytes encoded.
-
-    :rtype: str
-    """
-    parts = uri.split('%')
-    for i in range(1, len(parts)):
-        h = parts[i][0:2]
-        if len(h) == 2 and h.isalnum():
-            try:
-                c = chr(int(h, 16))
-            except ValueError:
-                raise InvalidURL("Invalid percent-escape sequence: '%s'" % h)
-
-            if c in UNRESERVED_SET:
-                parts[i] = c + parts[i][2:]
-            else:
-                parts[i] = '%' + parts[i]
-        else:
-            parts[i] = '%' + parts[i]
-    return ''.join(parts)
-
-
-def requote_uri(uri):
-    """Re-quote the given URI.
-
-    This function passes the given URI through an unquote/quote cycle to
-    ensure that it is fully and consistently quoted.
-
-    :rtype: str
-    """
-    safe_with_percent = "!#$%&'()*+,/:;=?@[]~"
-    safe_without_percent = "!#$&'()*+,/:;=?@[]~"
-    try:
-        # Unquote only the unreserved characters
-        # Then quote only illegal characters (do not quote reserved,
-        # unreserved, or '%')
-        return quote(unquote_unreserved(uri), safe=safe_with_percent)
-    except InvalidURL:
-        # We couldn't unquote the given URI, so let's try quoting it, but
-        # there may be unquoted '%'s in the URI. We need to make sure they're
-        # properly quoted so they do not cause issues elsewhere.
-        return quote(uri, safe=safe_without_percent)
-
-
-def address_in_network(ip, net):
-    """This function allows you to check if an IP belongs to a network subnet
-
-    Example: returns True if ip = 192.168.1.1 and net = 192.168.1.0/24
-             returns False if ip = 192.168.1.1 and net = 192.168.100.0/24
-
-    :rtype: bool
-    """
-    ipaddr = struct.unpack('=L', socket.inet_aton(ip))[0]
-    netaddr, bits = net.split('/')
-    netmask = struct.unpack('=L', socket.inet_aton(dotted_netmask(int(bits))))[0]
-    network = struct.unpack('=L', socket.inet_aton(netaddr))[0] & netmask
-    return (ipaddr & netmask) == (network & netmask)
-
-
-def dotted_netmask(mask):
-    """Converts mask from /xx format to xxx.xxx.xxx.xxx
-
-    Example: if mask is 24 function returns 255.255.255.0
-
-    :rtype: str
-    """
-    bits = 0xffffffff ^ (1 << 32 - mask) - 1
-    return socket.inet_ntoa(struct.pack('>I', bits))
-
-
-def is_ipv4_address(string_ip):
-    """
-    :rtype: bool
-    """
-    try:
-        socket.inet_aton(string_ip)
-    except socket.error:
-        return False
-    return True
-
-
-def is_valid_cidr(string_network):
-    """
-    Very simple check of the cidr format in no_proxy variable.
-
-    :rtype: bool
-    """
-    if string_network.count('/') == 1:
-        try:
-            mask = int(string_network.split('/')[1])
-        except ValueError:
-            return False
-
-        if mask < 1 or mask > 32:
-            return False
-
-        try:
-            socket.inet_aton(string_network.split('/')[0])
-        except socket.error:
-            return False
-    else:
-        return False
-    return True
-
-
-@contextlib.contextmanager
-def set_environ(env_name, value):
-    """Set the environment variable 'env_name' to 'value'
-
-    Save previous value, yield, and then restore the previous value stored in
-    the environment variable 'env_name'.
-
-    If 'value' is None, do nothing"""
-    value_changed = value is not None
-    if value_changed:
-        old_value = os.environ.get(env_name)
-        os.environ[env_name] = value
-    try:
-        yield
-    finally:
-        if value_changed:
-            if old_value is None:
-                del os.environ[env_name]
-            else:
-                os.environ[env_name] = old_value
-
-
-def should_bypass_proxies(url, no_proxy):
-    """
-    Returns whether we should bypass proxies or not.
-
-    :rtype: bool
-    """
-    # Prioritize lowercase environment variables over uppercase
-    # to keep a consistent behaviour with other http projects (curl, wget).
-    get_proxy = lambda k: os.environ.get(k) or os.environ.get(k.upper())
-
-    # First check whether no_proxy is defined. If it is, check that the URL
-    # we're getting isn't in the no_proxy list.
-    no_proxy_arg = no_proxy
-    if no_proxy is None:
-        no_proxy = get_proxy('no_proxy')
-    parsed = urlparse(url)
-
-    if parsed.hostname is None:
-        # URLs don't always have hostnames, e.g. file:/// urls.
-        return True
-
-    if no_proxy:
-        # We need to check whether we match here. We need to see if we match
-        # the end of the hostname, both with and without the port.
-        no_proxy = (
-            host for host in no_proxy.replace(' ', '').split(',') if host
-        )
-
-        if is_ipv4_address(parsed.hostname):
-            for proxy_ip in no_proxy:
-                if is_valid_cidr(proxy_ip):
-                    if address_in_network(parsed.hostname, proxy_ip):
-                        return True
-                elif parsed.hostname == proxy_ip:
-                    # If no_proxy ip was defined in plain IP notation instead of cidr notation &
-                    # matches the IP of the index
-                    return True
-        else:
-            host_with_port = parsed.hostname
-            if parsed.port:
-                host_with_port += ':{}'.format(parsed.port)
-
-            for host in no_proxy:
-                if parsed.hostname.endswith(host) or host_with_port.endswith(host):
-                    # The URL does match something in no_proxy, so we don't want
-                    # to apply the proxies on this URL.
-                    return True
-
-    with set_environ('no_proxy', no_proxy_arg):
-        # parsed.hostname can be `None` in cases such as a file URI.
-        try:
-            bypass = proxy_bypass(parsed.hostname)
-        except (TypeError, socket.gaierror):
-            bypass = False
-
-    if bypass:
-        return True
-
-    return False
-
-
-def get_environ_proxies(url, no_proxy=None):
-    """
-    Return a dict of environment proxies.
-
-    :rtype: dict
-    """
-    if should_bypass_proxies(url, no_proxy=no_proxy):
-        return {}
-    else:
-        return getproxies()
-
-
-def select_proxy(url, proxies):
-    """Select a proxy for the url, if applicable.
-
-    :param url: The url being for the request
-    :param proxies: A dictionary of schemes or schemes and hosts to proxy URLs
-    """
-    proxies = proxies or {}
-    urlparts = urlparse(url)
-    if urlparts.hostname is None:
-        return proxies.get(urlparts.scheme, proxies.get('all'))
-
-    proxy_keys = [
-        urlparts.scheme + '://' + urlparts.hostname,
-        urlparts.scheme,
-        'all://' + urlparts.hostname,
-        'all',
-    ]
-    proxy = None
-    for proxy_key in proxy_keys:
-        if proxy_key in proxies:
-            proxy = proxies[proxy_key]
-            break
-
-    return proxy
-
-
-def default_user_agent(name="python-requests"):
-    """
-    Return a string representing the default user agent.
-
-    :rtype: str
-    """
-    return '%s/%s' % (name, __version__)
-
-
-def default_headers():
-    """
-    :rtype: requests.structures.CaseInsensitiveDict
-    """
-    return CaseInsensitiveDict({
-        'User-Agent': default_user_agent(),
-        'Accept-Encoding': ', '.join(('gzip', 'deflate')),
-        'Accept': '*/*',
-        'Connection': 'keep-alive',
-    })
-
-
-def parse_header_links(value):
-    """Return a list of parsed link headers proxies.
-
-    i.e. Link: <http:/.../front.jpeg>; rel=front; type="image/jpeg",<http://.../back.jpeg>; rel=back;type="image/jpeg"
-
-    :rtype: list
-    """
-
-    links = []
-
-    replace_chars = ' \'"'
-
-    value = value.strip(replace_chars)
-    if not value:
-        return links
-
-    for val in re.split(', *<', value):
-        try:
-            url, params = val.split(';', 1)
-        except ValueError:
-            url, params = val, ''
-
-        link = {'url': url.strip('<> \'"')}
-
-        for param in params.split(';'):
-            try:
-                key, value = param.split('=')
-            except ValueError:
-                break
-
-            link[key.strip(replace_chars)] = value.strip(replace_chars)
-
-        links.append(link)
-
-    return links
-
-
-# Null bytes; no need to recreate these on each call to guess_json_utf
-_null = '\x00'.encode('ascii')  # encoding to ASCII for Python 3
-_null2 = _null * 2
-_null3 = _null * 3
-
-
-def guess_json_utf(data):
-    """
-    :rtype: str
-    """
-    # JSON always starts with two ASCII characters, so detection is as
-    # easy as counting the nulls and from their location and count
-    # determine the encoding. Also detect a BOM, if present.
-    sample = data[:4]
-    if sample in (codecs.BOM_UTF32_LE, codecs.BOM_UTF32_BE):
-        return 'utf-32'     # BOM included
-    if sample[:3] == codecs.BOM_UTF8:
-        return 'utf-8-sig'  # BOM included, MS style (discouraged)
-    if sample[:2] in (codecs.BOM_UTF16_LE, codecs.BOM_UTF16_BE):
-        return 'utf-16'     # BOM included
-    nullcount = sample.count(_null)
-    if nullcount == 0:
-        return 'utf-8'
-    if nullcount == 2:
-        if sample[::2] == _null2:   # 1st and 3rd are null
-            return 'utf-16-be'
-        if sample[1::2] == _null2:  # 2nd and 4th are null
-            return 'utf-16-le'
-        # Did not detect 2 valid UTF-16 ascii-range characters
-    if nullcount == 3:
-        if sample[:3] == _null3:
-            return 'utf-32-be'
-        if sample[1:] == _null3:
-            return 'utf-32-le'
-        # Did not detect a valid UTF-32 ascii-range character
-    return None
-
-
-def prepend_scheme_if_needed(url, new_scheme):
-    """Given a URL that may or may not have a scheme, prepend the given scheme.
-    Does not replace a present scheme with the one provided as an argument.
-
-    :rtype: str
-    """
-    scheme, netloc, path, params, query, fragment = urlparse(url, new_scheme)
-
-    # urlparse is a finicky beast, and sometimes decides that there isn't a
-    # netloc present. Assume that it's being over-cautious, and switch netloc
-    # and path if urlparse decided there was no netloc.
-    if not netloc:
-        netloc, path = path, netloc
-
-    return urlunparse((scheme, netloc, path, params, query, fragment))
-
-
-def get_auth_from_url(url):
-    """Given a url with authentication components, extract them into a tuple of
-    username,password.
-
-    :rtype: (str,str)
-    """
-    parsed = urlparse(url)
-
-    try:
-        auth = (unquote(parsed.username), unquote(parsed.password))
-    except (AttributeError, TypeError):
-        auth = ('', '')
-
-    return auth
-
-
-# Moved outside of function to avoid recompile every call
-_CLEAN_HEADER_REGEX_BYTE = re.compile(b'^\\S[^\\r\\n]*$|^$')
-_CLEAN_HEADER_REGEX_STR = re.compile(r'^\S[^\r\n]*$|^$')
-
-
-def check_header_validity(header):
-    """Verifies that header value is a string which doesn't contain
-    leading whitespace or return characters. This prevents unintended
-    header injection.
-
-    :param header: tuple, in the format (name, value).
-    """
-    name, value = header
-
-    if isinstance(value, bytes):
-        pat = _CLEAN_HEADER_REGEX_BYTE
-    else:
-        pat = _CLEAN_HEADER_REGEX_STR
-    try:
-        if not pat.match(value):
-            raise InvalidHeader("Invalid return character or leading space in header: %s" % name)
-    except TypeError:
-        raise InvalidHeader("Value for header {%s: %s} must be of type str or "
-                            "bytes, not %s" % (name, value, type(value)))
-
-
-def urldefragauth(url):
-    """
-    Given a url remove the fragment and the authentication part.
-
-    :rtype: str
-    """
-    scheme, netloc, path, params, query, fragment = urlparse(url)
-
-    # see func:`prepend_scheme_if_needed`
-    if not netloc:
-        netloc, path = path, netloc
-
-    netloc = netloc.rsplit('@', 1)[-1]
-
-    return urlunparse((scheme, netloc, path, params, query, ''))
-
-
-def rewind_body(prepared_request):
-    """Move file pointer back to its recorded starting position
-    so it can be read again on redirect.
-    """
-    body_seek = getattr(prepared_request.body, 'seek', None)
-    if body_seek is not None and isinstance(prepared_request._body_position, integer_types):
-        try:
-            body_seek(prepared_request._body_position)
-        except (IOError, OSError):
-            raise UnrewindableBodyError("An error occurred when rewinding request "
-                                        "body for redirect.")
-    else:
-        raise UnrewindableBodyError("Unable to rewind request body for redirect.")
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/retrying.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/retrying.py
deleted file mode 100644
index 6d1e627..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/retrying.py
+++ /dev/null
@@ -1,267 +0,0 @@
-## Copyright 2013-2014 Ray Holder
-##
-## Licensed under the Apache License, Version 2.0 (the "License");
-## you may not use this file except in compliance with the License.
-## You may obtain a copy of the License at
-##
-## http://www.apache.org/licenses/LICENSE-2.0
-##
-## Unless required by applicable law or agreed to in writing, software
-## distributed under the License is distributed on an "AS IS" BASIS,
-## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-## See the License for the specific language governing permissions and
-## limitations under the License.
-
-import random
-from pip._vendor import six
-import sys
-import time
-import traceback
-
-
-# sys.maxint / 2, since Python 3.2 doesn't have a sys.maxint...
-MAX_WAIT = 1073741823
-
-
-def retry(*dargs, **dkw):
-    """
-    Decorator function that instantiates the Retrying object
-    @param *dargs: positional arguments passed to Retrying object
-    @param **dkw: keyword arguments passed to the Retrying object
-    """
-    # support both @retry and @retry() as valid syntax
-    if len(dargs) == 1 and callable(dargs[0]):
-        def wrap_simple(f):
-
-            @six.wraps(f)
-            def wrapped_f(*args, **kw):
-                return Retrying().call(f, *args, **kw)
-
-            return wrapped_f
-
-        return wrap_simple(dargs[0])
-
-    else:
-        def wrap(f):
-
-            @six.wraps(f)
-            def wrapped_f(*args, **kw):
-                return Retrying(*dargs, **dkw).call(f, *args, **kw)
-
-            return wrapped_f
-
-        return wrap
-
-
-class Retrying(object):
-
-    def __init__(self,
-                 stop=None, wait=None,
-                 stop_max_attempt_number=None,
-                 stop_max_delay=None,
-                 wait_fixed=None,
-                 wait_random_min=None, wait_random_max=None,
-                 wait_incrementing_start=None, wait_incrementing_increment=None,
-                 wait_exponential_multiplier=None, wait_exponential_max=None,
-                 retry_on_exception=None,
-                 retry_on_result=None,
-                 wrap_exception=False,
-                 stop_func=None,
-                 wait_func=None,
-                 wait_jitter_max=None):
-
-        self._stop_max_attempt_number = 5 if stop_max_attempt_number is None else stop_max_attempt_number
-        self._stop_max_delay = 100 if stop_max_delay is None else stop_max_delay
-        self._wait_fixed = 1000 if wait_fixed is None else wait_fixed
-        self._wait_random_min = 0 if wait_random_min is None else wait_random_min
-        self._wait_random_max = 1000 if wait_random_max is None else wait_random_max
-        self._wait_incrementing_start = 0 if wait_incrementing_start is None else wait_incrementing_start
-        self._wait_incrementing_increment = 100 if wait_incrementing_increment is None else wait_incrementing_increment
-        self._wait_exponential_multiplier = 1 if wait_exponential_multiplier is None else wait_exponential_multiplier
-        self._wait_exponential_max = MAX_WAIT if wait_exponential_max is None else wait_exponential_max
-        self._wait_jitter_max = 0 if wait_jitter_max is None else wait_jitter_max
-
-        # TODO add chaining of stop behaviors
-        # stop behavior
-        stop_funcs = []
-        if stop_max_attempt_number is not None:
-            stop_funcs.append(self.stop_after_attempt)
-
-        if stop_max_delay is not None:
-            stop_funcs.append(self.stop_after_delay)
-
-        if stop_func is not None:
-            self.stop = stop_func
-
-        elif stop is None:
-            self.stop = lambda attempts, delay: any(f(attempts, delay) for f in stop_funcs)
-
-        else:
-            self.stop = getattr(self, stop)
-
-        # TODO add chaining of wait behaviors
-        # wait behavior
-        wait_funcs = [lambda *args, **kwargs: 0]
-        if wait_fixed is not None:
-            wait_funcs.append(self.fixed_sleep)
-
-        if wait_random_min is not None or wait_random_max is not None:
-            wait_funcs.append(self.random_sleep)
-
-        if wait_incrementing_start is not None or wait_incrementing_increment is not None:
-            wait_funcs.append(self.incrementing_sleep)
-
-        if wait_exponential_multiplier is not None or wait_exponential_max is not None:
-            wait_funcs.append(self.exponential_sleep)
-
-        if wait_func is not None:
-            self.wait = wait_func
-
-        elif wait is None:
-            self.wait = lambda attempts, delay: max(f(attempts, delay) for f in wait_funcs)
-
-        else:
-            self.wait = getattr(self, wait)
-
-        # retry on exception filter
-        if retry_on_exception is None:
-            self._retry_on_exception = self.always_reject
-        else:
-            self._retry_on_exception = retry_on_exception
-
-        # TODO simplify retrying by Exception types
-        # retry on result filter
-        if retry_on_result is None:
-            self._retry_on_result = self.never_reject
-        else:
-            self._retry_on_result = retry_on_result
-
-        self._wrap_exception = wrap_exception
-
-    def stop_after_attempt(self, previous_attempt_number, delay_since_first_attempt_ms):
-        """Stop after the previous attempt >= stop_max_attempt_number."""
-        return previous_attempt_number >= self._stop_max_attempt_number
-
-    def stop_after_delay(self, previous_attempt_number, delay_since_first_attempt_ms):
-        """Stop after the time from the first attempt >= stop_max_delay."""
-        return delay_since_first_attempt_ms >= self._stop_max_delay
-
-    def no_sleep(self, previous_attempt_number, delay_since_first_attempt_ms):
-        """Don't sleep at all before retrying."""
-        return 0
-
-    def fixed_sleep(self, previous_attempt_number, delay_since_first_attempt_ms):
-        """Sleep a fixed amount of time between each retry."""
-        return self._wait_fixed
-
-    def random_sleep(self, previous_attempt_number, delay_since_first_attempt_ms):
-        """Sleep a random amount of time between wait_random_min and wait_random_max"""
-        return random.randint(self._wait_random_min, self._wait_random_max)
-
-    def incrementing_sleep(self, previous_attempt_number, delay_since_first_attempt_ms):
-        """
-        Sleep an incremental amount of time after each attempt, starting at
-        wait_incrementing_start and incrementing by wait_incrementing_increment
-        """
-        result = self._wait_incrementing_start + (self._wait_incrementing_increment * (previous_attempt_number - 1))
-        if result < 0:
-            result = 0
-        return result
-
-    def exponential_sleep(self, previous_attempt_number, delay_since_first_attempt_ms):
-        exp = 2 ** previous_attempt_number
-        result = self._wait_exponential_multiplier * exp
-        if result > self._wait_exponential_max:
-            result = self._wait_exponential_max
-        if result < 0:
-            result = 0
-        return result
-
-    def never_reject(self, result):
-        return False
-
-    def always_reject(self, result):
-        return True
-
-    def should_reject(self, attempt):
-        reject = False
-        if attempt.has_exception:
-            reject |= self._retry_on_exception(attempt.value[1])
-        else:
-            reject |= self._retry_on_result(attempt.value)
-
-        return reject
-
-    def call(self, fn, *args, **kwargs):
-        start_time = int(round(time.time() * 1000))
-        attempt_number = 1
-        while True:
-            try:
-                attempt = Attempt(fn(*args, **kwargs), attempt_number, False)
-            except:
-                tb = sys.exc_info()
-                attempt = Attempt(tb, attempt_number, True)
-
-            if not self.should_reject(attempt):
-                return attempt.get(self._wrap_exception)
-
-            delay_since_first_attempt_ms = int(round(time.time() * 1000)) - start_time
-            if self.stop(attempt_number, delay_since_first_attempt_ms):
-                if not self._wrap_exception and attempt.has_exception:
-                    # get() on an attempt with an exception should cause it to be raised, but raise just in case
-                    raise attempt.get()
-                else:
-                    raise RetryError(attempt)
-            else:
-                sleep = self.wait(attempt_number, delay_since_first_attempt_ms)
-                if self._wait_jitter_max:
-                    jitter = random.random() * self._wait_jitter_max
-                    sleep = sleep + max(0, jitter)
-                time.sleep(sleep / 1000.0)
-
-            attempt_number += 1
-
-
-class Attempt(object):
-    """
-    An Attempt encapsulates a call to a target function that may end as a
-    normal return value from the function or an Exception depending on what
-    occurred during the execution.
-    """
-
-    def __init__(self, value, attempt_number, has_exception):
-        self.value = value
-        self.attempt_number = attempt_number
-        self.has_exception = has_exception
-
-    def get(self, wrap_exception=False):
-        """
-        Return the return value of this Attempt instance or raise an Exception.
-        If wrap_exception is true, this Attempt is wrapped inside of a
-        RetryError before being raised.
-        """
-        if self.has_exception:
-            if wrap_exception:
-                raise RetryError(self)
-            else:
-                six.reraise(self.value[0], self.value[1], self.value[2])
-        else:
-            return self.value
-
-    def __repr__(self):
-        if self.has_exception:
-            return "Attempts: {0}, Error:\n{1}".format(self.attempt_number, "".join(traceback.format_tb(self.value[2])))
-        else:
-            return "Attempts: {0}, Value: {1}".format(self.attempt_number, self.value)
-
-
-class RetryError(Exception):
-    """
-    A RetryError encapsulates the last Attempt instance right before giving up.
-    """
-
-    def __init__(self, last_attempt):
-        self.last_attempt = last_attempt
-
-    def __str__(self):
-        return "RetryError[{0}]".format(self.last_attempt)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/six.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/six.py
deleted file mode 100644
index 89b2188..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/six.py
+++ /dev/null
@@ -1,952 +0,0 @@
-# Copyright (c) 2010-2018 Benjamin Peterson
-#
-# Permission is hereby granted, free of charge, to any person obtaining a copy
-# of this software and associated documentation files (the "Software"), to deal
-# in the Software without restriction, including without limitation the rights
-# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-# copies of the Software, and to permit persons to whom the Software is
-# furnished to do so, subject to the following conditions:
-#
-# The above copyright notice and this permission notice shall be included in all
-# copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-# SOFTWARE.
-
-"""Utilities for writing code that runs on Python 2 and 3"""
-
-from __future__ import absolute_import
-
-import functools
-import itertools
-import operator
-import sys
-import types
-
-__author__ = "Benjamin Peterson <benjamin@python.org>"
-__version__ = "1.12.0"
-
-
-# Useful for very coarse version differentiation.
-PY2 = sys.version_info[0] == 2
-PY3 = sys.version_info[0] == 3
-PY34 = sys.version_info[0:2] >= (3, 4)
-
-if PY3:
-    string_types = str,
-    integer_types = int,
-    class_types = type,
-    text_type = str
-    binary_type = bytes
-
-    MAXSIZE = sys.maxsize
-else:
-    string_types = basestring,
-    integer_types = (int, long)
-    class_types = (type, types.ClassType)
-    text_type = unicode
-    binary_type = str
-
-    if sys.platform.startswith("java"):
-        # Jython always uses 32 bits.
-        MAXSIZE = int((1 << 31) - 1)
-    else:
-        # It's possible to have sizeof(long) != sizeof(Py_ssize_t).
-        class X(object):
-
-            def __len__(self):
-                return 1 << 31
-        try:
-            len(X())
-        except OverflowError:
-            # 32-bit
-            MAXSIZE = int((1 << 31) - 1)
-        else:
-            # 64-bit
-            MAXSIZE = int((1 << 63) - 1)
-        del X
-
-
-def _add_doc(func, doc):
-    """Add documentation to a function."""
-    func.__doc__ = doc
-
-
-def _import_module(name):
-    """Import module, returning the module after the last dot."""
-    __import__(name)
-    return sys.modules[name]
-
-
-class _LazyDescr(object):
-
-    def __init__(self, name):
-        self.name = name
-
-    def __get__(self, obj, tp):
-        result = self._resolve()
-        setattr(obj, self.name, result)  # Invokes __set__.
-        try:
-            # This is a bit ugly, but it avoids running this again by
-            # removing this descriptor.
-            delattr(obj.__class__, self.name)
-        except AttributeError:
-            pass
-        return result
-
-
-class MovedModule(_LazyDescr):
-
-    def __init__(self, name, old, new=None):
-        super(MovedModule, self).__init__(name)
-        if PY3:
-            if new is None:
-                new = name
-            self.mod = new
-        else:
-            self.mod = old
-
-    def _resolve(self):
-        return _import_module(self.mod)
-
-    def __getattr__(self, attr):
-        _module = self._resolve()
-        value = getattr(_module, attr)
-        setattr(self, attr, value)
-        return value
-
-
-class _LazyModule(types.ModuleType):
-
-    def __init__(self, name):
-        super(_LazyModule, self).__init__(name)
-        self.__doc__ = self.__class__.__doc__
-
-    def __dir__(self):
-        attrs = ["__doc__", "__name__"]
-        attrs += [attr.name for attr in self._moved_attributes]
-        return attrs
-
-    # Subclasses should override this
-    _moved_attributes = []
-
-
-class MovedAttribute(_LazyDescr):
-
-    def __init__(self, name, old_mod, new_mod, old_attr=None, new_attr=None):
-        super(MovedAttribute, self).__init__(name)
-        if PY3:
-            if new_mod is None:
-                new_mod = name
-            self.mod = new_mod
-            if new_attr is None:
-                if old_attr is None:
-                    new_attr = name
-                else:
-                    new_attr = old_attr
-            self.attr = new_attr
-        else:
-            self.mod = old_mod
-            if old_attr is None:
-                old_attr = name
-            self.attr = old_attr
-
-    def _resolve(self):
-        module = _import_module(self.mod)
-        return getattr(module, self.attr)
-
-
-class _SixMetaPathImporter(object):
-
-    """
-    A meta path importer to import six.moves and its submodules.
-
-    This class implements a PEP302 finder and loader. It should be compatible
-    with Python 2.5 and all existing versions of Python3
-    """
-
-    def __init__(self, six_module_name):
-        self.name = six_module_name
-        self.known_modules = {}
-
-    def _add_module(self, mod, *fullnames):
-        for fullname in fullnames:
-            self.known_modules[self.name + "." + fullname] = mod
-
-    def _get_module(self, fullname):
-        return self.known_modules[self.name + "." + fullname]
-
-    def find_module(self, fullname, path=None):
-        if fullname in self.known_modules:
-            return self
-        return None
-
-    def __get_module(self, fullname):
-        try:
-            return self.known_modules[fullname]
-        except KeyError:
-            raise ImportError("This loader does not know module " + fullname)
-
-    def load_module(self, fullname):
-        try:
-            # in case of a reload
-            return sys.modules[fullname]
-        except KeyError:
-            pass
-        mod = self.__get_module(fullname)
-        if isinstance(mod, MovedModule):
-            mod = mod._resolve()
-        else:
-            mod.__loader__ = self
-        sys.modules[fullname] = mod
-        return mod
-
-    def is_package(self, fullname):
-        """
-        Return true, if the named module is a package.
-
-        We need this method to get correct spec objects with
-        Python 3.4 (see PEP451)
-        """
-        return hasattr(self.__get_module(fullname), "__path__")
-
-    def get_code(self, fullname):
-        """Return None
-
-        Required, if is_package is implemented"""
-        self.__get_module(fullname)  # eventually raises ImportError
-        return None
-    get_source = get_code  # same as get_code
-
-_importer = _SixMetaPathImporter(__name__)
-
-
-class _MovedItems(_LazyModule):
-
-    """Lazy loading of moved objects"""
-    __path__ = []  # mark as package
-
-
-_moved_attributes = [
-    MovedAttribute("cStringIO", "cStringIO", "io", "StringIO"),
-    MovedAttribute("filter", "itertools", "builtins", "ifilter", "filter"),
-    MovedAttribute("filterfalse", "itertools", "itertools", "ifilterfalse", "filterfalse"),
-    MovedAttribute("input", "__builtin__", "builtins", "raw_input", "input"),
-    MovedAttribute("intern", "__builtin__", "sys"),
-    MovedAttribute("map", "itertools", "builtins", "imap", "map"),
-    MovedAttribute("getcwd", "os", "os", "getcwdu", "getcwd"),
-    MovedAttribute("getcwdb", "os", "os", "getcwd", "getcwdb"),
-    MovedAttribute("getoutput", "commands", "subprocess"),
-    MovedAttribute("range", "__builtin__", "builtins", "xrange", "range"),
-    MovedAttribute("reload_module", "__builtin__", "importlib" if PY34 else "imp", "reload"),
-    MovedAttribute("reduce", "__builtin__", "functools"),
-    MovedAttribute("shlex_quote", "pipes", "shlex", "quote"),
-    MovedAttribute("StringIO", "StringIO", "io"),
-    MovedAttribute("UserDict", "UserDict", "collections"),
-    MovedAttribute("UserList", "UserList", "collections"),
-    MovedAttribute("UserString", "UserString", "collections"),
-    MovedAttribute("xrange", "__builtin__", "builtins", "xrange", "range"),
-    MovedAttribute("zip", "itertools", "builtins", "izip", "zip"),
-    MovedAttribute("zip_longest", "itertools", "itertools", "izip_longest", "zip_longest"),
-    MovedModule("builtins", "__builtin__"),
-    MovedModule("configparser", "ConfigParser"),
-    MovedModule("copyreg", "copy_reg"),
-    MovedModule("dbm_gnu", "gdbm", "dbm.gnu"),
-    MovedModule("_dummy_thread", "dummy_thread", "_dummy_thread"),
-    MovedModule("http_cookiejar", "cookielib", "http.cookiejar"),
-    MovedModule("http_cookies", "Cookie", "http.cookies"),
-    MovedModule("html_entities", "htmlentitydefs", "html.entities"),
-    MovedModule("html_parser", "HTMLParser", "html.parser"),
-    MovedModule("http_client", "httplib", "http.client"),
-    MovedModule("email_mime_base", "email.MIMEBase", "email.mime.base"),
-    MovedModule("email_mime_image", "email.MIMEImage", "email.mime.image"),
-    MovedModule("email_mime_multipart", "email.MIMEMultipart", "email.mime.multipart"),
-    MovedModule("email_mime_nonmultipart", "email.MIMENonMultipart", "email.mime.nonmultipart"),
-    MovedModule("email_mime_text", "email.MIMEText", "email.mime.text"),
-    MovedModule("BaseHTTPServer", "BaseHTTPServer", "http.server"),
-    MovedModule("CGIHTTPServer", "CGIHTTPServer", "http.server"),
-    MovedModule("SimpleHTTPServer", "SimpleHTTPServer", "http.server"),
-    MovedModule("cPickle", "cPickle", "pickle"),
-    MovedModule("queue", "Queue"),
-    MovedModule("reprlib", "repr"),
-    MovedModule("socketserver", "SocketServer"),
-    MovedModule("_thread", "thread", "_thread"),
-    MovedModule("tkinter", "Tkinter"),
-    MovedModule("tkinter_dialog", "Dialog", "tkinter.dialog"),
-    MovedModule("tkinter_filedialog", "FileDialog", "tkinter.filedialog"),
-    MovedModule("tkinter_scrolledtext", "ScrolledText", "tkinter.scrolledtext"),
-    MovedModule("tkinter_simpledialog", "SimpleDialog", "tkinter.simpledialog"),
-    MovedModule("tkinter_tix", "Tix", "tkinter.tix"),
-    MovedModule("tkinter_ttk", "ttk", "tkinter.ttk"),
-    MovedModule("tkinter_constants", "Tkconstants", "tkinter.constants"),
-    MovedModule("tkinter_dnd", "Tkdnd", "tkinter.dnd"),
-    MovedModule("tkinter_colorchooser", "tkColorChooser",
-                "tkinter.colorchooser"),
-    MovedModule("tkinter_commondialog", "tkCommonDialog",
-                "tkinter.commondialog"),
-    MovedModule("tkinter_tkfiledialog", "tkFileDialog", "tkinter.filedialog"),
-    MovedModule("tkinter_font", "tkFont", "tkinter.font"),
-    MovedModule("tkinter_messagebox", "tkMessageBox", "tkinter.messagebox"),
-    MovedModule("tkinter_tksimpledialog", "tkSimpleDialog",
-                "tkinter.simpledialog"),
-    MovedModule("urllib_parse", __name__ + ".moves.urllib_parse", "urllib.parse"),
-    MovedModule("urllib_error", __name__ + ".moves.urllib_error", "urllib.error"),
-    MovedModule("urllib", __name__ + ".moves.urllib", __name__ + ".moves.urllib"),
-    MovedModule("urllib_robotparser", "robotparser", "urllib.robotparser"),
-    MovedModule("xmlrpc_client", "xmlrpclib", "xmlrpc.client"),
-    MovedModule("xmlrpc_server", "SimpleXMLRPCServer", "xmlrpc.server"),
-]
-# Add windows specific modules.
-if sys.platform == "win32":
-    _moved_attributes += [
-        MovedModule("winreg", "_winreg"),
-    ]
-
-for attr in _moved_attributes:
-    setattr(_MovedItems, attr.name, attr)
-    if isinstance(attr, MovedModule):
-        _importer._add_module(attr, "moves." + attr.name)
-del attr
-
-_MovedItems._moved_attributes = _moved_attributes
-
-moves = _MovedItems(__name__ + ".moves")
-_importer._add_module(moves, "moves")
-
-
-class Module_six_moves_urllib_parse(_LazyModule):
-
-    """Lazy loading of moved objects in six.moves.urllib_parse"""
-
-
-_urllib_parse_moved_attributes = [
-    MovedAttribute("ParseResult", "urlparse", "urllib.parse"),
-    MovedAttribute("SplitResult", "urlparse", "urllib.parse"),
-    MovedAttribute("parse_qs", "urlparse", "urllib.parse"),
-    MovedAttribute("parse_qsl", "urlparse", "urllib.parse"),
-    MovedAttribute("urldefrag", "urlparse", "urllib.parse"),
-    MovedAttribute("urljoin", "urlparse", "urllib.parse"),
-    MovedAttribute("urlparse", "urlparse", "urllib.parse"),
-    MovedAttribute("urlsplit", "urlparse", "urllib.parse"),
-    MovedAttribute("urlunparse", "urlparse", "urllib.parse"),
-    MovedAttribute("urlunsplit", "urlparse", "urllib.parse"),
-    MovedAttribute("quote", "urllib", "urllib.parse"),
-    MovedAttribute("quote_plus", "urllib", "urllib.parse"),
-    MovedAttribute("unquote", "urllib", "urllib.parse"),
-    MovedAttribute("unquote_plus", "urllib", "urllib.parse"),
-    MovedAttribute("unquote_to_bytes", "urllib", "urllib.parse", "unquote", "unquote_to_bytes"),
-    MovedAttribute("urlencode", "urllib", "urllib.parse"),
-    MovedAttribute("splitquery", "urllib", "urllib.parse"),
-    MovedAttribute("splittag", "urllib", "urllib.parse"),
-    MovedAttribute("splituser", "urllib", "urllib.parse"),
-    MovedAttribute("splitvalue", "urllib", "urllib.parse"),
-    MovedAttribute("uses_fragment", "urlparse", "urllib.parse"),
-    MovedAttribute("uses_netloc", "urlparse", "urllib.parse"),
-    MovedAttribute("uses_params", "urlparse", "urllib.parse"),
-    MovedAttribute("uses_query", "urlparse", "urllib.parse"),
-    MovedAttribute("uses_relative", "urlparse", "urllib.parse"),
-]
-for attr in _urllib_parse_moved_attributes:
-    setattr(Module_six_moves_urllib_parse, attr.name, attr)
-del attr
-
-Module_six_moves_urllib_parse._moved_attributes = _urllib_parse_moved_attributes
-
-_importer._add_module(Module_six_moves_urllib_parse(__name__ + ".moves.urllib_parse"),
-                      "moves.urllib_parse", "moves.urllib.parse")
-
-
-class Module_six_moves_urllib_error(_LazyModule):
-
-    """Lazy loading of moved objects in six.moves.urllib_error"""
-
-
-_urllib_error_moved_attributes = [
-    MovedAttribute("URLError", "urllib2", "urllib.error"),
-    MovedAttribute("HTTPError", "urllib2", "urllib.error"),
-    MovedAttribute("ContentTooShortError", "urllib", "urllib.error"),
-]
-for attr in _urllib_error_moved_attributes:
-    setattr(Module_six_moves_urllib_error, attr.name, attr)
-del attr
-
-Module_six_moves_urllib_error._moved_attributes = _urllib_error_moved_attributes
-
-_importer._add_module(Module_six_moves_urllib_error(__name__ + ".moves.urllib.error"),
-                      "moves.urllib_error", "moves.urllib.error")
-
-
-class Module_six_moves_urllib_request(_LazyModule):
-
-    """Lazy loading of moved objects in six.moves.urllib_request"""
-
-
-_urllib_request_moved_attributes = [
-    MovedAttribute("urlopen", "urllib2", "urllib.request"),
-    MovedAttribute("install_opener", "urllib2", "urllib.request"),
-    MovedAttribute("build_opener", "urllib2", "urllib.request"),
-    MovedAttribute("pathname2url", "urllib", "urllib.request"),
-    MovedAttribute("url2pathname", "urllib", "urllib.request"),
-    MovedAttribute("getproxies", "urllib", "urllib.request"),
-    MovedAttribute("Request", "urllib2", "urllib.request"),
-    MovedAttribute("OpenerDirector", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPDefaultErrorHandler", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPRedirectHandler", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPCookieProcessor", "urllib2", "urllib.request"),
-    MovedAttribute("ProxyHandler", "urllib2", "urllib.request"),
-    MovedAttribute("BaseHandler", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPPasswordMgr", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPPasswordMgrWithDefaultRealm", "urllib2", "urllib.request"),
-    MovedAttribute("AbstractBasicAuthHandler", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPBasicAuthHandler", "urllib2", "urllib.request"),
-    MovedAttribute("ProxyBasicAuthHandler", "urllib2", "urllib.request"),
-    MovedAttribute("AbstractDigestAuthHandler", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPDigestAuthHandler", "urllib2", "urllib.request"),
-    MovedAttribute("ProxyDigestAuthHandler", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPHandler", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPSHandler", "urllib2", "urllib.request"),
-    MovedAttribute("FileHandler", "urllib2", "urllib.request"),
-    MovedAttribute("FTPHandler", "urllib2", "urllib.request"),
-    MovedAttribute("CacheFTPHandler", "urllib2", "urllib.request"),
-    MovedAttribute("UnknownHandler", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPErrorProcessor", "urllib2", "urllib.request"),
-    MovedAttribute("urlretrieve", "urllib", "urllib.request"),
-    MovedAttribute("urlcleanup", "urllib", "urllib.request"),
-    MovedAttribute("URLopener", "urllib", "urllib.request"),
-    MovedAttribute("FancyURLopener", "urllib", "urllib.request"),
-    MovedAttribute("proxy_bypass", "urllib", "urllib.request"),
-    MovedAttribute("parse_http_list", "urllib2", "urllib.request"),
-    MovedAttribute("parse_keqv_list", "urllib2", "urllib.request"),
-]
-for attr in _urllib_request_moved_attributes:
-    setattr(Module_six_moves_urllib_request, attr.name, attr)
-del attr
-
-Module_six_moves_urllib_request._moved_attributes = _urllib_request_moved_attributes
-
-_importer._add_module(Module_six_moves_urllib_request(__name__ + ".moves.urllib.request"),
-                      "moves.urllib_request", "moves.urllib.request")
-
-
-class Module_six_moves_urllib_response(_LazyModule):
-
-    """Lazy loading of moved objects in six.moves.urllib_response"""
-
-
-_urllib_response_moved_attributes = [
-    MovedAttribute("addbase", "urllib", "urllib.response"),
-    MovedAttribute("addclosehook", "urllib", "urllib.response"),
-    MovedAttribute("addinfo", "urllib", "urllib.response"),
-    MovedAttribute("addinfourl", "urllib", "urllib.response"),
-]
-for attr in _urllib_response_moved_attributes:
-    setattr(Module_six_moves_urllib_response, attr.name, attr)
-del attr
-
-Module_six_moves_urllib_response._moved_attributes = _urllib_response_moved_attributes
-
-_importer._add_module(Module_six_moves_urllib_response(__name__ + ".moves.urllib.response"),
-                      "moves.urllib_response", "moves.urllib.response")
-
-
-class Module_six_moves_urllib_robotparser(_LazyModule):
-
-    """Lazy loading of moved objects in six.moves.urllib_robotparser"""
-
-
-_urllib_robotparser_moved_attributes = [
-    MovedAttribute("RobotFileParser", "robotparser", "urllib.robotparser"),
-]
-for attr in _urllib_robotparser_moved_attributes:
-    setattr(Module_six_moves_urllib_robotparser, attr.name, attr)
-del attr
-
-Module_six_moves_urllib_robotparser._moved_attributes = _urllib_robotparser_moved_attributes
-
-_importer._add_module(Module_six_moves_urllib_robotparser(__name__ + ".moves.urllib.robotparser"),
-                      "moves.urllib_robotparser", "moves.urllib.robotparser")
-
-
-class Module_six_moves_urllib(types.ModuleType):
-
-    """Create a six.moves.urllib namespace that resembles the Python 3 namespace"""
-    __path__ = []  # mark as package
-    parse = _importer._get_module("moves.urllib_parse")
-    error = _importer._get_module("moves.urllib_error")
-    request = _importer._get_module("moves.urllib_request")
-    response = _importer._get_module("moves.urllib_response")
-    robotparser = _importer._get_module("moves.urllib_robotparser")
-
-    def __dir__(self):
-        return ['parse', 'error', 'request', 'response', 'robotparser']
-
-_importer._add_module(Module_six_moves_urllib(__name__ + ".moves.urllib"),
-                      "moves.urllib")
-
-
-def add_move(move):
-    """Add an item to six.moves."""
-    setattr(_MovedItems, move.name, move)
-
-
-def remove_move(name):
-    """Remove item from six.moves."""
-    try:
-        delattr(_MovedItems, name)
-    except AttributeError:
-        try:
-            del moves.__dict__[name]
-        except KeyError:
-            raise AttributeError("no such move, %r" % (name,))
-
-
-if PY3:
-    _meth_func = "__func__"
-    _meth_self = "__self__"
-
-    _func_closure = "__closure__"
-    _func_code = "__code__"
-    _func_defaults = "__defaults__"
-    _func_globals = "__globals__"
-else:
-    _meth_func = "im_func"
-    _meth_self = "im_self"
-
-    _func_closure = "func_closure"
-    _func_code = "func_code"
-    _func_defaults = "func_defaults"
-    _func_globals = "func_globals"
-
-
-try:
-    advance_iterator = next
-except NameError:
-    def advance_iterator(it):
-        return it.next()
-next = advance_iterator
-
-
-try:
-    callable = callable
-except NameError:
-    def callable(obj):
-        return any("__call__" in klass.__dict__ for klass in type(obj).__mro__)
-
-
-if PY3:
-    def get_unbound_function(unbound):
-        return unbound
-
-    create_bound_method = types.MethodType
-
-    def create_unbound_method(func, cls):
-        return func
-
-    Iterator = object
-else:
-    def get_unbound_function(unbound):
-        return unbound.im_func
-
-    def create_bound_method(func, obj):
-        return types.MethodType(func, obj, obj.__class__)
-
-    def create_unbound_method(func, cls):
-        return types.MethodType(func, None, cls)
-
-    class Iterator(object):
-
-        def next(self):
-            return type(self).__next__(self)
-
-    callable = callable
-_add_doc(get_unbound_function,
-         """Get the function out of a possibly unbound function""")
-
-
-get_method_function = operator.attrgetter(_meth_func)
-get_method_self = operator.attrgetter(_meth_self)
-get_function_closure = operator.attrgetter(_func_closure)
-get_function_code = operator.attrgetter(_func_code)
-get_function_defaults = operator.attrgetter(_func_defaults)
-get_function_globals = operator.attrgetter(_func_globals)
-
-
-if PY3:
-    def iterkeys(d, **kw):
-        return iter(d.keys(**kw))
-
-    def itervalues(d, **kw):
-        return iter(d.values(**kw))
-
-    def iteritems(d, **kw):
-        return iter(d.items(**kw))
-
-    def iterlists(d, **kw):
-        return iter(d.lists(**kw))
-
-    viewkeys = operator.methodcaller("keys")
-
-    viewvalues = operator.methodcaller("values")
-
-    viewitems = operator.methodcaller("items")
-else:
-    def iterkeys(d, **kw):
-        return d.iterkeys(**kw)
-
-    def itervalues(d, **kw):
-        return d.itervalues(**kw)
-
-    def iteritems(d, **kw):
-        return d.iteritems(**kw)
-
-    def iterlists(d, **kw):
-        return d.iterlists(**kw)
-
-    viewkeys = operator.methodcaller("viewkeys")
-
-    viewvalues = operator.methodcaller("viewvalues")
-
-    viewitems = operator.methodcaller("viewitems")
-
-_add_doc(iterkeys, "Return an iterator over the keys of a dictionary.")
-_add_doc(itervalues, "Return an iterator over the values of a dictionary.")
-_add_doc(iteritems,
-         "Return an iterator over the (key, value) pairs of a dictionary.")
-_add_doc(iterlists,
-         "Return an iterator over the (key, [values]) pairs of a dictionary.")
-
-
-if PY3:
-    def b(s):
-        return s.encode("latin-1")
-
-    def u(s):
-        return s
-    unichr = chr
-    import struct
-    int2byte = struct.Struct(">B").pack
-    del struct
-    byte2int = operator.itemgetter(0)
-    indexbytes = operator.getitem
-    iterbytes = iter
-    import io
-    StringIO = io.StringIO
-    BytesIO = io.BytesIO
-    _assertCountEqual = "assertCountEqual"
-    if sys.version_info[1] <= 1:
-        _assertRaisesRegex = "assertRaisesRegexp"
-        _assertRegex = "assertRegexpMatches"
-    else:
-        _assertRaisesRegex = "assertRaisesRegex"
-        _assertRegex = "assertRegex"
-else:
-    def b(s):
-        return s
-    # Workaround for standalone backslash
-
-    def u(s):
-        return unicode(s.replace(r'\\', r'\\\\'), "unicode_escape")
-    unichr = unichr
-    int2byte = chr
-
-    def byte2int(bs):
-        return ord(bs[0])
-
-    def indexbytes(buf, i):
-        return ord(buf[i])
-    iterbytes = functools.partial(itertools.imap, ord)
-    import StringIO
-    StringIO = BytesIO = StringIO.StringIO
-    _assertCountEqual = "assertItemsEqual"
-    _assertRaisesRegex = "assertRaisesRegexp"
-    _assertRegex = "assertRegexpMatches"
-_add_doc(b, """Byte literal""")
-_add_doc(u, """Text literal""")
-
-
-def assertCountEqual(self, *args, **kwargs):
-    return getattr(self, _assertCountEqual)(*args, **kwargs)
-
-
-def assertRaisesRegex(self, *args, **kwargs):
-    return getattr(self, _assertRaisesRegex)(*args, **kwargs)
-
-
-def assertRegex(self, *args, **kwargs):
-    return getattr(self, _assertRegex)(*args, **kwargs)
-
-
-if PY3:
-    exec_ = getattr(moves.builtins, "exec")
-
-    def reraise(tp, value, tb=None):
-        try:
-            if value is None:
-                value = tp()
-            if value.__traceback__ is not tb:
-                raise value.with_traceback(tb)
-            raise value
-        finally:
-            value = None
-            tb = None
-
-else:
-    def exec_(_code_, _globs_=None, _locs_=None):
-        """Execute code in a namespace."""
-        if _globs_ is None:
-            frame = sys._getframe(1)
-            _globs_ = frame.f_globals
-            if _locs_ is None:
-                _locs_ = frame.f_locals
-            del frame
-        elif _locs_ is None:
-            _locs_ = _globs_
-        exec("""exec _code_ in _globs_, _locs_""")
-
-    exec_("""def reraise(tp, value, tb=None):
-    try:
-        raise tp, value, tb
-    finally:
-        tb = None
-""")
-
-
-if sys.version_info[:2] == (3, 2):
-    exec_("""def raise_from(value, from_value):
-    try:
-        if from_value is None:
-            raise value
-        raise value from from_value
-    finally:
-        value = None
-""")
-elif sys.version_info[:2] > (3, 2):
-    exec_("""def raise_from(value, from_value):
-    try:
-        raise value from from_value
-    finally:
-        value = None
-""")
-else:
-    def raise_from(value, from_value):
-        raise value
-
-
-print_ = getattr(moves.builtins, "print", None)
-if print_ is None:
-    def print_(*args, **kwargs):
-        """The new-style print function for Python 2.4 and 2.5."""
-        fp = kwargs.pop("file", sys.stdout)
-        if fp is None:
-            return
-
-        def write(data):
-            if not isinstance(data, basestring):
-                data = str(data)
-            # If the file has an encoding, encode unicode with it.
-            if (isinstance(fp, file) and
-                    isinstance(data, unicode) and
-                    fp.encoding is not None):
-                errors = getattr(fp, "errors", None)
-                if errors is None:
-                    errors = "strict"
-                data = data.encode(fp.encoding, errors)
-            fp.write(data)
-        want_unicode = False
-        sep = kwargs.pop("sep", None)
-        if sep is not None:
-            if isinstance(sep, unicode):
-                want_unicode = True
-            elif not isinstance(sep, str):
-                raise TypeError("sep must be None or a string")
-        end = kwargs.pop("end", None)
-        if end is not None:
-            if isinstance(end, unicode):
-                want_unicode = True
-            elif not isinstance(end, str):
-                raise TypeError("end must be None or a string")
-        if kwargs:
-            raise TypeError("invalid keyword arguments to print()")
-        if not want_unicode:
-            for arg in args:
-                if isinstance(arg, unicode):
-                    want_unicode = True
-                    break
-        if want_unicode:
-            newline = unicode("\n")
-            space = unicode(" ")
-        else:
-            newline = "\n"
-            space = " "
-        if sep is None:
-            sep = space
-        if end is None:
-            end = newline
-        for i, arg in enumerate(args):
-            if i:
-                write(sep)
-            write(arg)
-        write(end)
-if sys.version_info[:2] < (3, 3):
-    _print = print_
-
-    def print_(*args, **kwargs):
-        fp = kwargs.get("file", sys.stdout)
-        flush = kwargs.pop("flush", False)
-        _print(*args, **kwargs)
-        if flush and fp is not None:
-            fp.flush()
-
-_add_doc(reraise, """Reraise an exception.""")
-
-if sys.version_info[0:2] < (3, 4):
-    def wraps(wrapped, assigned=functools.WRAPPER_ASSIGNMENTS,
-              updated=functools.WRAPPER_UPDATES):
-        def wrapper(f):
-            f = functools.wraps(wrapped, assigned, updated)(f)
-            f.__wrapped__ = wrapped
-            return f
-        return wrapper
-else:
-    wraps = functools.wraps
-
-
-def with_metaclass(meta, *bases):
-    """Create a base class with a metaclass."""
-    # This requires a bit of explanation: the basic idea is to make a dummy
-    # metaclass for one level of class instantiation that replaces itself with
-    # the actual metaclass.
-    class metaclass(type):
-
-        def __new__(cls, name, this_bases, d):
-            return meta(name, bases, d)
-
-        @classmethod
-        def __prepare__(cls, name, this_bases):
-            return meta.__prepare__(name, bases)
-    return type.__new__(metaclass, 'temporary_class', (), {})
-
-
-def add_metaclass(metaclass):
-    """Class decorator for creating a class with a metaclass."""
-    def wrapper(cls):
-        orig_vars = cls.__dict__.copy()
-        slots = orig_vars.get('__slots__')
-        if slots is not None:
-            if isinstance(slots, str):
-                slots = [slots]
-            for slots_var in slots:
-                orig_vars.pop(slots_var)
-        orig_vars.pop('__dict__', None)
-        orig_vars.pop('__weakref__', None)
-        if hasattr(cls, '__qualname__'):
-            orig_vars['__qualname__'] = cls.__qualname__
-        return metaclass(cls.__name__, cls.__bases__, orig_vars)
-    return wrapper
-
-
-def ensure_binary(s, encoding='utf-8', errors='strict'):
-    """Coerce **s** to six.binary_type.
-
-    For Python 2:
-      - `unicode` -> encoded to `str`
-      - `str` -> `str`
-
-    For Python 3:
-      - `str` -> encoded to `bytes`
-      - `bytes` -> `bytes`
-    """
-    if isinstance(s, text_type):
-        return s.encode(encoding, errors)
-    elif isinstance(s, binary_type):
-        return s
-    else:
-        raise TypeError("not expecting type '%s'" % type(s))
-
-
-def ensure_str(s, encoding='utf-8', errors='strict'):
-    """Coerce *s* to `str`.
-
-    For Python 2:
-      - `unicode` -> encoded to `str`
-      - `str` -> `str`
-
-    For Python 3:
-      - `str` -> `str`
-      - `bytes` -> decoded to `str`
-    """
-    if not isinstance(s, (text_type, binary_type)):
-        raise TypeError("not expecting type '%s'" % type(s))
-    if PY2 and isinstance(s, text_type):
-        s = s.encode(encoding, errors)
-    elif PY3 and isinstance(s, binary_type):
-        s = s.decode(encoding, errors)
-    return s
-
-
-def ensure_text(s, encoding='utf-8', errors='strict'):
-    """Coerce *s* to six.text_type.
-
-    For Python 2:
-      - `unicode` -> `unicode`
-      - `str` -> `unicode`
-
-    For Python 3:
-      - `str` -> `str`
-      - `bytes` -> decoded to `str`
-    """
-    if isinstance(s, binary_type):
-        return s.decode(encoding, errors)
-    elif isinstance(s, text_type):
-        return s
-    else:
-        raise TypeError("not expecting type '%s'" % type(s))
-
-
-
-def python_2_unicode_compatible(klass):
-    """
-    A decorator that defines __unicode__ and __str__ methods under Python 2.
-    Under Python 3 it does nothing.
-
-    To support Python 2 and 3 with a single code base, define a __str__ method
-    returning text and apply this decorator to the class.
-    """
-    if PY2:
-        if '__str__' not in klass.__dict__:
-            raise ValueError("@python_2_unicode_compatible cannot be applied "
-                             "to %s because it doesn't define __str__()." %
-                             klass.__name__)
-        klass.__unicode__ = klass.__str__
-        klass.__str__ = lambda self: self.__unicode__().encode('utf-8')
-    return klass
-
-
-# Complete the moves implementation.
-# This code is at the end of this module to speed up module loading.
-# Turn this module into a package.
-__path__ = []  # required for PEP 302 and PEP 451
-__package__ = __name__  # see PEP 366 @ReservedAssignment
-if globals().get("__spec__") is not None:
-    __spec__.submodule_search_locations = []  # PEP 451 @UndefinedVariable
-# Remove other six meta path importers, since they cause problems. This can
-# happen if six is removed from sys.modules and then reloaded. (Setuptools does
-# this for some reason.)
-if sys.meta_path:
-    for i, importer in enumerate(sys.meta_path):
-        # Here's some real nastiness: Another "instance" of the six module might
-        # be floating around. Therefore, we can't use isinstance() to check for
-        # the six meta path importer, since the other six instance will have
-        # inserted an importer with different class.
-        if (type(importer).__name__ == "_SixMetaPathImporter" and
-                importer.name == __name__):
-            del sys.meta_path[i]
-            break
-    del i, importer
-# Finally, add the importer to the meta path import hook.
-sys.meta_path.append(_importer)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/__init__.py
deleted file mode 100644
index 148a9c3..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/__init__.py
+++ /dev/null
@@ -1,92 +0,0 @@
-"""
-urllib3 - Thread-safe connection pooling and re-using.
-"""
-
-from __future__ import absolute_import
-import warnings
-
-from .connectionpool import (
-    HTTPConnectionPool,
-    HTTPSConnectionPool,
-    connection_from_url
-)
-
-from . import exceptions
-from .filepost import encode_multipart_formdata
-from .poolmanager import PoolManager, ProxyManager, proxy_from_url
-from .response import HTTPResponse
-from .util.request import make_headers
-from .util.url import get_host
-from .util.timeout import Timeout
-from .util.retry import Retry
-
-
-# Set default logging handler to avoid "No handler found" warnings.
-import logging
-from logging import NullHandler
-
-__author__ = 'Andrey Petrov (andrey.petrov@shazow.net)'
-__license__ = 'MIT'
-__version__ = '1.24.1'
-
-__all__ = (
-    'HTTPConnectionPool',
-    'HTTPSConnectionPool',
-    'PoolManager',
-    'ProxyManager',
-    'HTTPResponse',
-    'Retry',
-    'Timeout',
-    'add_stderr_logger',
-    'connection_from_url',
-    'disable_warnings',
-    'encode_multipart_formdata',
-    'get_host',
-    'make_headers',
-    'proxy_from_url',
-)
-
-logging.getLogger(__name__).addHandler(NullHandler())
-
-
-def add_stderr_logger(level=logging.DEBUG):
-    """
-    Helper for quickly adding a StreamHandler to the logger. Useful for
-    debugging.
-
-    Returns the handler after adding it.
-    """
-    # This method needs to be in this __init__.py to get the __name__ correct
-    # even if urllib3 is vendored within another package.
-    logger = logging.getLogger(__name__)
-    handler = logging.StreamHandler()
-    handler.setFormatter(logging.Formatter('%(asctime)s %(levelname)s %(message)s'))
-    logger.addHandler(handler)
-    logger.setLevel(level)
-    logger.debug('Added a stderr logging handler to logger: %s', __name__)
-    return handler
-
-
-# ... Clean up.
-del NullHandler
-
-
-# All warning filters *must* be appended unless you're really certain that they
-# shouldn't be: otherwise, it's very hard for users to use most Python
-# mechanisms to silence them.
-# SecurityWarning's always go off by default.
-warnings.simplefilter('always', exceptions.SecurityWarning, append=True)
-# SubjectAltNameWarning's should go off once per host
-warnings.simplefilter('default', exceptions.SubjectAltNameWarning, append=True)
-# InsecurePlatformWarning's don't vary between requests, so we keep it default.
-warnings.simplefilter('default', exceptions.InsecurePlatformWarning,
-                      append=True)
-# SNIMissingWarnings should go off only once.
-warnings.simplefilter('default', exceptions.SNIMissingWarning, append=True)
-
-
-def disable_warnings(category=exceptions.HTTPWarning):
-    """
-    Helper for quickly disabling all urllib3 warnings.
-    """
-    warnings.simplefilter('ignore', category)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/_collections.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/_collections.py
deleted file mode 100644
index 34f2381..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/_collections.py
+++ /dev/null
@@ -1,329 +0,0 @@
-from __future__ import absolute_import
-try:
-    from collections.abc import Mapping, MutableMapping
-except ImportError:
-    from collections import Mapping, MutableMapping
-try:
-    from threading import RLock
-except ImportError:  # Platform-specific: No threads available
-    class RLock:
-        def __enter__(self):
-            pass
-
-        def __exit__(self, exc_type, exc_value, traceback):
-            pass
-
-
-from collections import OrderedDict
-from .exceptions import InvalidHeader
-from .packages.six import iterkeys, itervalues, PY3
-
-
-__all__ = ['RecentlyUsedContainer', 'HTTPHeaderDict']
-
-
-_Null = object()
-
-
-class RecentlyUsedContainer(MutableMapping):
-    """
-    Provides a thread-safe dict-like container which maintains up to
-    ``maxsize`` keys while throwing away the least-recently-used keys beyond
-    ``maxsize``.
-
-    :param maxsize:
-        Maximum number of recent elements to retain.
-
-    :param dispose_func:
-        Every time an item is evicted from the container,
-        ``dispose_func(value)`` is called.  Callback which will get called
-    """
-
-    ContainerCls = OrderedDict
-
-    def __init__(self, maxsize=10, dispose_func=None):
-        self._maxsize = maxsize
-        self.dispose_func = dispose_func
-
-        self._container = self.ContainerCls()
-        self.lock = RLock()
-
-    def __getitem__(self, key):
-        # Re-insert the item, moving it to the end of the eviction line.
-        with self.lock:
-            item = self._container.pop(key)
-            self._container[key] = item
-            return item
-
-    def __setitem__(self, key, value):
-        evicted_value = _Null
-        with self.lock:
-            # Possibly evict the existing value of 'key'
-            evicted_value = self._container.get(key, _Null)
-            self._container[key] = value
-
-            # If we didn't evict an existing value, we might have to evict the
-            # least recently used item from the beginning of the container.
-            if len(self._container) > self._maxsize:
-                _key, evicted_value = self._container.popitem(last=False)
-
-        if self.dispose_func and evicted_value is not _Null:
-            self.dispose_func(evicted_value)
-
-    def __delitem__(self, key):
-        with self.lock:
-            value = self._container.pop(key)
-
-        if self.dispose_func:
-            self.dispose_func(value)
-
-    def __len__(self):
-        with self.lock:
-            return len(self._container)
-
-    def __iter__(self):
-        raise NotImplementedError('Iteration over this class is unlikely to be threadsafe.')
-
-    def clear(self):
-        with self.lock:
-            # Copy pointers to all values, then wipe the mapping
-            values = list(itervalues(self._container))
-            self._container.clear()
-
-        if self.dispose_func:
-            for value in values:
-                self.dispose_func(value)
-
-    def keys(self):
-        with self.lock:
-            return list(iterkeys(self._container))
-
-
-class HTTPHeaderDict(MutableMapping):
-    """
-    :param headers:
-        An iterable of field-value pairs. Must not contain multiple field names
-        when compared case-insensitively.
-
-    :param kwargs:
-        Additional field-value pairs to pass in to ``dict.update``.
-
-    A ``dict`` like container for storing HTTP Headers.
-
-    Field names are stored and compared case-insensitively in compliance with
-    RFC 7230. Iteration provides the first case-sensitive key seen for each
-    case-insensitive pair.
-
-    Using ``__setitem__`` syntax overwrites fields that compare equal
-    case-insensitively in order to maintain ``dict``'s api. For fields that
-    compare equal, instead create a new ``HTTPHeaderDict`` and use ``.add``
-    in a loop.
-
-    If multiple fields that are equal case-insensitively are passed to the
-    constructor or ``.update``, the behavior is undefined and some will be
-    lost.
-
-    >>> headers = HTTPHeaderDict()
-    >>> headers.add('Set-Cookie', 'foo=bar')
-    >>> headers.add('set-cookie', 'baz=quxx')
-    >>> headers['content-length'] = '7'
-    >>> headers['SET-cookie']
-    'foo=bar, baz=quxx'
-    >>> headers['Content-Length']
-    '7'
-    """
-
-    def __init__(self, headers=None, **kwargs):
-        super(HTTPHeaderDict, self).__init__()
-        self._container = OrderedDict()
-        if headers is not None:
-            if isinstance(headers, HTTPHeaderDict):
-                self._copy_from(headers)
-            else:
-                self.extend(headers)
-        if kwargs:
-            self.extend(kwargs)
-
-    def __setitem__(self, key, val):
-        self._container[key.lower()] = [key, val]
-        return self._container[key.lower()]
-
-    def __getitem__(self, key):
-        val = self._container[key.lower()]
-        return ', '.join(val[1:])
-
-    def __delitem__(self, key):
-        del self._container[key.lower()]
-
-    def __contains__(self, key):
-        return key.lower() in self._container
-
-    def __eq__(self, other):
-        if not isinstance(other, Mapping) and not hasattr(other, 'keys'):
-            return False
-        if not isinstance(other, type(self)):
-            other = type(self)(other)
-        return (dict((k.lower(), v) for k, v in self.itermerged()) ==
-                dict((k.lower(), v) for k, v in other.itermerged()))
-
-    def __ne__(self, other):
-        return not self.__eq__(other)
-
-    if not PY3:  # Python 2
-        iterkeys = MutableMapping.iterkeys
-        itervalues = MutableMapping.itervalues
-
-    __marker = object()
-
-    def __len__(self):
-        return len(self._container)
-
-    def __iter__(self):
-        # Only provide the originally cased names
-        for vals in self._container.values():
-            yield vals[0]
-
-    def pop(self, key, default=__marker):
-        '''D.pop(k[,d]) -> v, remove specified key and return the corresponding value.
-          If key is not found, d is returned if given, otherwise KeyError is raised.
-        '''
-        # Using the MutableMapping function directly fails due to the private marker.
-        # Using ordinary dict.pop would expose the internal structures.
-        # So let's reinvent the wheel.
-        try:
-            value = self[key]
-        except KeyError:
-            if default is self.__marker:
-                raise
-            return default
-        else:
-            del self[key]
-            return value
-
-    def discard(self, key):
-        try:
-            del self[key]
-        except KeyError:
-            pass
-
-    def add(self, key, val):
-        """Adds a (name, value) pair, doesn't overwrite the value if it already
-        exists.
-
-        >>> headers = HTTPHeaderDict(foo='bar')
-        >>> headers.add('Foo', 'baz')
-        >>> headers['foo']
-        'bar, baz'
-        """
-        key_lower = key.lower()
-        new_vals = [key, val]
-        # Keep the common case aka no item present as fast as possible
-        vals = self._container.setdefault(key_lower, new_vals)
-        if new_vals is not vals:
-            vals.append(val)
-
-    def extend(self, *args, **kwargs):
-        """Generic import function for any type of header-like object.
-        Adapted version of MutableMapping.update in order to insert items
-        with self.add instead of self.__setitem__
-        """
-        if len(args) > 1:
-            raise TypeError("extend() takes at most 1 positional "
-                            "arguments ({0} given)".format(len(args)))
-        other = args[0] if len(args) >= 1 else ()
-
-        if isinstance(other, HTTPHeaderDict):
-            for key, val in other.iteritems():
-                self.add(key, val)
-        elif isinstance(other, Mapping):
-            for key in other:
-                self.add(key, other[key])
-        elif hasattr(other, "keys"):
-            for key in other.keys():
-                self.add(key, other[key])
-        else:
-            for key, value in other:
-                self.add(key, value)
-
-        for key, value in kwargs.items():
-            self.add(key, value)
-
-    def getlist(self, key, default=__marker):
-        """Returns a list of all the values for the named field. Returns an
-        empty list if the key doesn't exist."""
-        try:
-            vals = self._container[key.lower()]
-        except KeyError:
-            if default is self.__marker:
-                return []
-            return default
-        else:
-            return vals[1:]
-
-    # Backwards compatibility for httplib
-    getheaders = getlist
-    getallmatchingheaders = getlist
-    iget = getlist
-
-    # Backwards compatibility for http.cookiejar
-    get_all = getlist
-
-    def __repr__(self):
-        return "%s(%s)" % (type(self).__name__, dict(self.itermerged()))
-
-    def _copy_from(self, other):
-        for key in other:
-            val = other.getlist(key)
-            if isinstance(val, list):
-                # Don't need to convert tuples
-                val = list(val)
-            self._container[key.lower()] = [key] + val
-
-    def copy(self):
-        clone = type(self)()
-        clone._copy_from(self)
-        return clone
-
-    def iteritems(self):
-        """Iterate over all header lines, including duplicate ones."""
-        for key in self:
-            vals = self._container[key.lower()]
-            for val in vals[1:]:
-                yield vals[0], val
-
-    def itermerged(self):
-        """Iterate over all headers, merging duplicate ones together."""
-        for key in self:
-            val = self._container[key.lower()]
-            yield val[0], ', '.join(val[1:])
-
-    def items(self):
-        return list(self.iteritems())
-
-    @classmethod
-    def from_httplib(cls, message):  # Python 2
-        """Read headers from a Python 2 httplib message object."""
-        # python2.7 does not expose a proper API for exporting multiheaders
-        # efficiently. This function re-reads raw lines from the message
-        # object and extracts the multiheaders properly.
-        obs_fold_continued_leaders = (' ', '\t')
-        headers = []
-
-        for line in message.headers:
-            if line.startswith(obs_fold_continued_leaders):
-                if not headers:
-                    # We received a header line that starts with OWS as described
-                    # in RFC-7230 S3.2.4. This indicates a multiline header, but
-                    # there exists no previous header to which we can attach it.
-                    raise InvalidHeader(
-                        'Header continuation with no previous header: %s' % line
-                    )
-                else:
-                    key, value = headers[-1]
-                    headers[-1] = (key, value + ' ' + line.strip())
-                    continue
-
-            key, value = line.split(':', 1)
-            headers.append((key, value.strip()))
-
-        return cls(headers)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/connection.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/connection.py
deleted file mode 100644
index 02b3665..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/connection.py
+++ /dev/null
@@ -1,391 +0,0 @@
-from __future__ import absolute_import
-import datetime
-import logging
-import os
-import socket
-from socket import error as SocketError, timeout as SocketTimeout
-import warnings
-from .packages import six
-from .packages.six.moves.http_client import HTTPConnection as _HTTPConnection
-from .packages.six.moves.http_client import HTTPException  # noqa: F401
-
-try:  # Compiled with SSL?
-    import ssl
-    BaseSSLError = ssl.SSLError
-except (ImportError, AttributeError):  # Platform-specific: No SSL.
-    ssl = None
-
-    class BaseSSLError(BaseException):
-        pass
-
-
-try:  # Python 3:
-    # Not a no-op, we're adding this to the namespace so it can be imported.
-    ConnectionError = ConnectionError
-except NameError:  # Python 2:
-    class ConnectionError(Exception):
-        pass
-
-
-from .exceptions import (
-    NewConnectionError,
-    ConnectTimeoutError,
-    SubjectAltNameWarning,
-    SystemTimeWarning,
-)
-from .packages.ssl_match_hostname import match_hostname, CertificateError
-
-from .util.ssl_ import (
-    resolve_cert_reqs,
-    resolve_ssl_version,
-    assert_fingerprint,
-    create_urllib3_context,
-    ssl_wrap_socket
-)
-
-
-from .util import connection
-
-from ._collections import HTTPHeaderDict
-
-log = logging.getLogger(__name__)
-
-port_by_scheme = {
-    'http': 80,
-    'https': 443,
-}
-
-# When updating RECENT_DATE, move it to within two years of the current date,
-# and not less than 6 months ago.
-# Example: if Today is 2018-01-01, then RECENT_DATE should be any date on or
-# after 2016-01-01 (today - 2 years) AND before 2017-07-01 (today - 6 months)
-RECENT_DATE = datetime.date(2017, 6, 30)
-
-
-class DummyConnection(object):
-    """Used to detect a failed ConnectionCls import."""
-    pass
-
-
-class HTTPConnection(_HTTPConnection, object):
-    """
-    Based on httplib.HTTPConnection but provides an extra constructor
-    backwards-compatibility layer between older and newer Pythons.
-
-    Additional keyword parameters are used to configure attributes of the connection.
-    Accepted parameters include:
-
-      - ``strict``: See the documentation on :class:`urllib3.connectionpool.HTTPConnectionPool`
-      - ``source_address``: Set the source address for the current connection.
-      - ``socket_options``: Set specific options on the underlying socket. If not specified, then
-        defaults are loaded from ``HTTPConnection.default_socket_options`` which includes disabling
-        Nagle's algorithm (sets TCP_NODELAY to 1) unless the connection is behind a proxy.
-
-        For example, if you wish to enable TCP Keep Alive in addition to the defaults,
-        you might pass::
-
-            HTTPConnection.default_socket_options + [
-                (socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1),
-            ]
-
-        Or you may want to disable the defaults by passing an empty list (e.g., ``[]``).
-    """
-
-    default_port = port_by_scheme['http']
-
-    #: Disable Nagle's algorithm by default.
-    #: ``[(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)]``
-    default_socket_options = [(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)]
-
-    #: Whether this connection verifies the host's certificate.
-    is_verified = False
-
-    def __init__(self, *args, **kw):
-        if six.PY3:  # Python 3
-            kw.pop('strict', None)
-
-        # Pre-set source_address.
-        self.source_address = kw.get('source_address')
-
-        #: The socket options provided by the user. If no options are
-        #: provided, we use the default options.
-        self.socket_options = kw.pop('socket_options', self.default_socket_options)
-
-        _HTTPConnection.__init__(self, *args, **kw)
-
-    @property
-    def host(self):
-        """
-        Getter method to remove any trailing dots that indicate the hostname is an FQDN.
-
-        In general, SSL certificates don't include the trailing dot indicating a
-        fully-qualified domain name, and thus, they don't validate properly when
-        checked against a domain name that includes the dot. In addition, some
-        servers may not expect to receive the trailing dot when provided.
-
-        However, the hostname with trailing dot is critical to DNS resolution; doing a
-        lookup with the trailing dot will properly only resolve the appropriate FQDN,
-        whereas a lookup without a trailing dot will search the system's search domain
-        list. Thus, it's important to keep the original host around for use only in
-        those cases where it's appropriate (i.e., when doing DNS lookup to establish the
-        actual TCP connection across which we're going to send HTTP requests).
-        """
-        return self._dns_host.rstrip('.')
-
-    @host.setter
-    def host(self, value):
-        """
-        Setter for the `host` property.
-
-        We assume that only urllib3 uses the _dns_host attribute; httplib itself
-        only uses `host`, and it seems reasonable that other libraries follow suit.
-        """
-        self._dns_host = value
-
-    def _new_conn(self):
-        """ Establish a socket connection and set nodelay settings on it.
-
-        :return: New socket connection.
-        """
-        extra_kw = {}
-        if self.source_address:
-            extra_kw['source_address'] = self.source_address
-
-        if self.socket_options:
-            extra_kw['socket_options'] = self.socket_options
-
-        try:
-            conn = connection.create_connection(
-                (self._dns_host, self.port), self.timeout, **extra_kw)
-
-        except SocketTimeout as e:
-            raise ConnectTimeoutError(
-                self, "Connection to %s timed out. (connect timeout=%s)" %
-                (self.host, self.timeout))
-
-        except SocketError as e:
-            raise NewConnectionError(
-                self, "Failed to establish a new connection: %s" % e)
-
-        return conn
-
-    def _prepare_conn(self, conn):
-        self.sock = conn
-        if self._tunnel_host:
-            # TODO: Fix tunnel so it doesn't depend on self.sock state.
-            self._tunnel()
-            # Mark this connection as not reusable
-            self.auto_open = 0
-
-    def connect(self):
-        conn = self._new_conn()
-        self._prepare_conn(conn)
-
-    def request_chunked(self, method, url, body=None, headers=None):
-        """
-        Alternative to the common request method, which sends the
-        body with chunked encoding and not as one block
-        """
-        headers = HTTPHeaderDict(headers if headers is not None else {})
-        skip_accept_encoding = 'accept-encoding' in headers
-        skip_host = 'host' in headers
-        self.putrequest(
-            method,
-            url,
-            skip_accept_encoding=skip_accept_encoding,
-            skip_host=skip_host
-        )
-        for header, value in headers.items():
-            self.putheader(header, value)
-        if 'transfer-encoding' not in headers:
-            self.putheader('Transfer-Encoding', 'chunked')
-        self.endheaders()
-
-        if body is not None:
-            stringish_types = six.string_types + (bytes,)
-            if isinstance(body, stringish_types):
-                body = (body,)
-            for chunk in body:
-                if not chunk:
-                    continue
-                if not isinstance(chunk, bytes):
-                    chunk = chunk.encode('utf8')
-                len_str = hex(len(chunk))[2:]
-                self.send(len_str.encode('utf-8'))
-                self.send(b'\r\n')
-                self.send(chunk)
-                self.send(b'\r\n')
-
-        # After the if clause, to always have a closed body
-        self.send(b'0\r\n\r\n')
-
-
-class HTTPSConnection(HTTPConnection):
-    default_port = port_by_scheme['https']
-
-    ssl_version = None
-
-    def __init__(self, host, port=None, key_file=None, cert_file=None,
-                 strict=None, timeout=socket._GLOBAL_DEFAULT_TIMEOUT,
-                 ssl_context=None, server_hostname=None, **kw):
-
-        HTTPConnection.__init__(self, host, port, strict=strict,
-                                timeout=timeout, **kw)
-
-        self.key_file = key_file
-        self.cert_file = cert_file
-        self.ssl_context = ssl_context
-        self.server_hostname = server_hostname
-
-        # Required property for Google AppEngine 1.9.0 which otherwise causes
-        # HTTPS requests to go out as HTTP. (See Issue #356)
-        self._protocol = 'https'
-
-    def connect(self):
-        conn = self._new_conn()
-        self._prepare_conn(conn)
-
-        if self.ssl_context is None:
-            self.ssl_context = create_urllib3_context(
-                ssl_version=resolve_ssl_version(None),
-                cert_reqs=resolve_cert_reqs(None),
-            )
-
-        self.sock = ssl_wrap_socket(
-            sock=conn,
-            keyfile=self.key_file,
-            certfile=self.cert_file,
-            ssl_context=self.ssl_context,
-            server_hostname=self.server_hostname
-        )
-
-
-class VerifiedHTTPSConnection(HTTPSConnection):
-    """
-    Based on httplib.HTTPSConnection but wraps the socket with
-    SSL certification.
-    """
-    cert_reqs = None
-    ca_certs = None
-    ca_cert_dir = None
-    ssl_version = None
-    assert_fingerprint = None
-
-    def set_cert(self, key_file=None, cert_file=None,
-                 cert_reqs=None, ca_certs=None,
-                 assert_hostname=None, assert_fingerprint=None,
-                 ca_cert_dir=None):
-        """
-        This method should only be called once, before the connection is used.
-        """
-        # If cert_reqs is not provided, we can try to guess. If the user gave
-        # us a cert database, we assume they want to use it: otherwise, if
-        # they gave us an SSL Context object we should use whatever is set for
-        # it.
-        if cert_reqs is None:
-            if ca_certs or ca_cert_dir:
-                cert_reqs = 'CERT_REQUIRED'
-            elif self.ssl_context is not None:
-                cert_reqs = self.ssl_context.verify_mode
-
-        self.key_file = key_file
-        self.cert_file = cert_file
-        self.cert_reqs = cert_reqs
-        self.assert_hostname = assert_hostname
-        self.assert_fingerprint = assert_fingerprint
-        self.ca_certs = ca_certs and os.path.expanduser(ca_certs)
-        self.ca_cert_dir = ca_cert_dir and os.path.expanduser(ca_cert_dir)
-
-    def connect(self):
-        # Add certificate verification
-        conn = self._new_conn()
-        hostname = self.host
-
-        if self._tunnel_host:
-            self.sock = conn
-            # Calls self._set_hostport(), so self.host is
-            # self._tunnel_host below.
-            self._tunnel()
-            # Mark this connection as not reusable
-            self.auto_open = 0
-
-            # Override the host with the one we're requesting data from.
-            hostname = self._tunnel_host
-
-        server_hostname = hostname
-        if self.server_hostname is not None:
-            server_hostname = self.server_hostname
-
-        is_time_off = datetime.date.today() < RECENT_DATE
-        if is_time_off:
-            warnings.warn((
-                'System time is way off (before {0}). This will probably '
-                'lead to SSL verification errors').format(RECENT_DATE),
-                SystemTimeWarning
-            )
-
-        # Wrap socket using verification with the root certs in
-        # trusted_root_certs
-        if self.ssl_context is None:
-            self.ssl_context = create_urllib3_context(
-                ssl_version=resolve_ssl_version(self.ssl_version),
-                cert_reqs=resolve_cert_reqs(self.cert_reqs),
-            )
-
-        context = self.ssl_context
-        context.verify_mode = resolve_cert_reqs(self.cert_reqs)
-        self.sock = ssl_wrap_socket(
-            sock=conn,
-            keyfile=self.key_file,
-            certfile=self.cert_file,
-            ca_certs=self.ca_certs,
-            ca_cert_dir=self.ca_cert_dir,
-            server_hostname=server_hostname,
-            ssl_context=context)
-
-        if self.assert_fingerprint:
-            assert_fingerprint(self.sock.getpeercert(binary_form=True),
-                               self.assert_fingerprint)
-        elif context.verify_mode != ssl.CERT_NONE \
-                and not getattr(context, 'check_hostname', False) \
-                and self.assert_hostname is not False:
-            # While urllib3 attempts to always turn off hostname matching from
-            # the TLS library, this cannot always be done. So we check whether
-            # the TLS Library still thinks it's matching hostnames.
-            cert = self.sock.getpeercert()
-            if not cert.get('subjectAltName', ()):
-                warnings.warn((
-                    'Certificate for {0} has no `subjectAltName`, falling back to check for a '
-                    '`commonName` for now. This feature is being removed by major browsers and '
-                    'deprecated by RFC 2818. (See https://github.com/shazow/urllib3/issues/497 '
-                    'for details.)'.format(hostname)),
-                    SubjectAltNameWarning
-                )
-            _match_hostname(cert, self.assert_hostname or server_hostname)
-
-        self.is_verified = (
-            context.verify_mode == ssl.CERT_REQUIRED or
-            self.assert_fingerprint is not None
-        )
-
-
-def _match_hostname(cert, asserted_hostname):
-    try:
-        match_hostname(cert, asserted_hostname)
-    except CertificateError as e:
-        log.error(
-            'Certificate did not match expected hostname: %s. '
-            'Certificate: %s', asserted_hostname, cert
-        )
-        # Add cert to exception and reraise so client code can inspect
-        # the cert when catching the exception, if they want to
-        e._peer_cert = cert
-        raise
-
-
-if ssl:
-    # Make a copy for testing.
-    UnverifiedHTTPSConnection = HTTPSConnection
-    HTTPSConnection = VerifiedHTTPSConnection
-else:
-    HTTPSConnection = DummyConnection
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/connectionpool.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/connectionpool.py
deleted file mode 100644
index f7a8f19..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/connectionpool.py
+++ /dev/null
@@ -1,896 +0,0 @@
-from __future__ import absolute_import
-import errno
-import logging
-import sys
-import warnings
-
-from socket import error as SocketError, timeout as SocketTimeout
-import socket
-
-
-from .exceptions import (
-    ClosedPoolError,
-    ProtocolError,
-    EmptyPoolError,
-    HeaderParsingError,
-    HostChangedError,
-    LocationValueError,
-    MaxRetryError,
-    ProxyError,
-    ReadTimeoutError,
-    SSLError,
-    TimeoutError,
-    InsecureRequestWarning,
-    NewConnectionError,
-)
-from .packages.ssl_match_hostname import CertificateError
-from .packages import six
-from .packages.six.moves import queue
-from .connection import (
-    port_by_scheme,
-    DummyConnection,
-    HTTPConnection, HTTPSConnection, VerifiedHTTPSConnection,
-    HTTPException, BaseSSLError,
-)
-from .request import RequestMethods
-from .response import HTTPResponse
-
-from .util.connection import is_connection_dropped
-from .util.request import set_file_position
-from .util.response import assert_header_parsing
-from .util.retry import Retry
-from .util.timeout import Timeout
-from .util.url import get_host, Url, NORMALIZABLE_SCHEMES
-from .util.queue import LifoQueue
-
-
-xrange = six.moves.xrange
-
-log = logging.getLogger(__name__)
-
-_Default = object()
-
-
-# Pool objects
-class ConnectionPool(object):
-    """
-    Base class for all connection pools, such as
-    :class:`.HTTPConnectionPool` and :class:`.HTTPSConnectionPool`.
-    """
-
-    scheme = None
-    QueueCls = LifoQueue
-
-    def __init__(self, host, port=None):
-        if not host:
-            raise LocationValueError("No host specified.")
-
-        self.host = _ipv6_host(host, self.scheme)
-        self._proxy_host = host.lower()
-        self.port = port
-
-    def __str__(self):
-        return '%s(host=%r, port=%r)' % (type(self).__name__,
-                                         self.host, self.port)
-
-    def __enter__(self):
-        return self
-
-    def __exit__(self, exc_type, exc_val, exc_tb):
-        self.close()
-        # Return False to re-raise any potential exceptions
-        return False
-
-    def close(self):
-        """
-        Close all pooled connections and disable the pool.
-        """
-        pass
-
-
-# This is taken from http://hg.python.org/cpython/file/7aaba721ebc0/Lib/socket.py#l252
-_blocking_errnos = {errno.EAGAIN, errno.EWOULDBLOCK}
-
-
-class HTTPConnectionPool(ConnectionPool, RequestMethods):
-    """
-    Thread-safe connection pool for one host.
-
-    :param host:
-        Host used for this HTTP Connection (e.g. "localhost"), passed into
-        :class:`httplib.HTTPConnection`.
-
-    :param port:
-        Port used for this HTTP Connection (None is equivalent to 80), passed
-        into :class:`httplib.HTTPConnection`.
-
-    :param strict:
-        Causes BadStatusLine to be raised if the status line can't be parsed
-        as a valid HTTP/1.0 or 1.1 status line, passed into
-        :class:`httplib.HTTPConnection`.
-
-        .. note::
-           Only works in Python 2. This parameter is ignored in Python 3.
-
-    :param timeout:
-        Socket timeout in seconds for each individual connection. This can
-        be a float or integer, which sets the timeout for the HTTP request,
-        or an instance of :class:`urllib3.util.Timeout` which gives you more
-        fine-grained control over request timeouts. After the constructor has
-        been parsed, this is always a `urllib3.util.Timeout` object.
-
-    :param maxsize:
-        Number of connections to save that can be reused. More than 1 is useful
-        in multithreaded situations. If ``block`` is set to False, more
-        connections will be created but they will not be saved once they've
-        been used.
-
-    :param block:
-        If set to True, no more than ``maxsize`` connections will be used at
-        a time. When no free connections are available, the call will block
-        until a connection has been released. This is a useful side effect for
-        particular multithreaded situations where one does not want to use more
-        than maxsize connections per host to prevent flooding.
-
-    :param headers:
-        Headers to include with all requests, unless other headers are given
-        explicitly.
-
-    :param retries:
-        Retry configuration to use by default with requests in this pool.
-
-    :param _proxy:
-        Parsed proxy URL, should not be used directly, instead, see
-        :class:`urllib3.connectionpool.ProxyManager`"
-
-    :param _proxy_headers:
-        A dictionary with proxy headers, should not be used directly,
-        instead, see :class:`urllib3.connectionpool.ProxyManager`"
-
-    :param \\**conn_kw:
-        Additional parameters are used to create fresh :class:`urllib3.connection.HTTPConnection`,
-        :class:`urllib3.connection.HTTPSConnection` instances.
-    """
-
-    scheme = 'http'
-    ConnectionCls = HTTPConnection
-    ResponseCls = HTTPResponse
-
-    def __init__(self, host, port=None, strict=False,
-                 timeout=Timeout.DEFAULT_TIMEOUT, maxsize=1, block=False,
-                 headers=None, retries=None,
-                 _proxy=None, _proxy_headers=None,
-                 **conn_kw):
-        ConnectionPool.__init__(self, host, port)
-        RequestMethods.__init__(self, headers)
-
-        self.strict = strict
-
-        if not isinstance(timeout, Timeout):
-            timeout = Timeout.from_float(timeout)
-
-        if retries is None:
-            retries = Retry.DEFAULT
-
-        self.timeout = timeout
-        self.retries = retries
-
-        self.pool = self.QueueCls(maxsize)
-        self.block = block
-
-        self.proxy = _proxy
-        self.proxy_headers = _proxy_headers or {}
-
-        # Fill the queue up so that doing get() on it will block properly
-        for _ in xrange(maxsize):
-            self.pool.put(None)
-
-        # These are mostly for testing and debugging purposes.
-        self.num_connections = 0
-        self.num_requests = 0
-        self.conn_kw = conn_kw
-
-        if self.proxy:
-            # Enable Nagle's algorithm for proxies, to avoid packet fragmentation.
-            # We cannot know if the user has added default socket options, so we cannot replace the
-            # list.
-            self.conn_kw.setdefault('socket_options', [])
-
-    def _new_conn(self):
-        """
-        Return a fresh :class:`HTTPConnection`.
-        """
-        self.num_connections += 1
-        log.debug("Starting new HTTP connection (%d): %s:%s",
-                  self.num_connections, self.host, self.port or "80")
-
-        conn = self.ConnectionCls(host=self.host, port=self.port,
-                                  timeout=self.timeout.connect_timeout,
-                                  strict=self.strict, **self.conn_kw)
-        return conn
-
-    def _get_conn(self, timeout=None):
-        """
-        Get a connection. Will return a pooled connection if one is available.
-
-        If no connections are available and :prop:`.block` is ``False``, then a
-        fresh connection is returned.
-
-        :param timeout:
-            Seconds to wait before giving up and raising
-            :class:`urllib3.exceptions.EmptyPoolError` if the pool is empty and
-            :prop:`.block` is ``True``.
-        """
-        conn = None
-        try:
-            conn = self.pool.get(block=self.block, timeout=timeout)
-
-        except AttributeError:  # self.pool is None
-            raise ClosedPoolError(self, "Pool is closed.")
-
-        except queue.Empty:
-            if self.block:
-                raise EmptyPoolError(self,
-                                     "Pool reached maximum size and no more "
-                                     "connections are allowed.")
-            pass  # Oh well, we'll create a new connection then
-
-        # If this is a persistent connection, check if it got disconnected
-        if conn and is_connection_dropped(conn):
-            log.debug("Resetting dropped connection: %s", self.host)
-            conn.close()
-            if getattr(conn, 'auto_open', 1) == 0:
-                # This is a proxied connection that has been mutated by
-                # httplib._tunnel() and cannot be reused (since it would
-                # attempt to bypass the proxy)
-                conn = None
-
-        return conn or self._new_conn()
-
-    def _put_conn(self, conn):
-        """
-        Put a connection back into the pool.
-
-        :param conn:
-            Connection object for the current host and port as returned by
-            :meth:`._new_conn` or :meth:`._get_conn`.
-
-        If the pool is already full, the connection is closed and discarded
-        because we exceeded maxsize. If connections are discarded frequently,
-        then maxsize should be increased.
-
-        If the pool is closed, then the connection will be closed and discarded.
-        """
-        try:
-            self.pool.put(conn, block=False)
-            return  # Everything is dandy, done.
-        except AttributeError:
-            # self.pool is None.
-            pass
-        except queue.Full:
-            # This should never happen if self.block == True
-            log.warning(
-                "Connection pool is full, discarding connection: %s",
-                self.host)
-
-        # Connection never got put back into the pool, close it.
-        if conn:
-            conn.close()
-
-    def _validate_conn(self, conn):
-        """
-        Called right before a request is made, after the socket is created.
-        """
-        pass
-
-    def _prepare_proxy(self, conn):
-        # Nothing to do for HTTP connections.
-        pass
-
-    def _get_timeout(self, timeout):
-        """ Helper that always returns a :class:`urllib3.util.Timeout` """
-        if timeout is _Default:
-            return self.timeout.clone()
-
-        if isinstance(timeout, Timeout):
-            return timeout.clone()
-        else:
-            # User passed us an int/float. This is for backwards compatibility,
-            # can be removed later
-            return Timeout.from_float(timeout)
-
-    def _raise_timeout(self, err, url, timeout_value):
-        """Is the error actually a timeout? Will raise a ReadTimeout or pass"""
-
-        if isinstance(err, SocketTimeout):
-            raise ReadTimeoutError(self, url, "Read timed out. (read timeout=%s)" % timeout_value)
-
-        # See the above comment about EAGAIN in Python 3. In Python 2 we have
-        # to specifically catch it and throw the timeout error
-        if hasattr(err, 'errno') and err.errno in _blocking_errnos:
-            raise ReadTimeoutError(self, url, "Read timed out. (read timeout=%s)" % timeout_value)
-
-        # Catch possible read timeouts thrown as SSL errors. If not the
-        # case, rethrow the original. We need to do this because of:
-        # http://bugs.python.org/issue10272
-        if 'timed out' in str(err) or 'did not complete (read)' in str(err):  # Python < 2.7.4
-            raise ReadTimeoutError(self, url, "Read timed out. (read timeout=%s)" % timeout_value)
-
-    def _make_request(self, conn, method, url, timeout=_Default, chunked=False,
-                      **httplib_request_kw):
-        """
-        Perform a request on a given urllib connection object taken from our
-        pool.
-
-        :param conn:
-            a connection from one of our connection pools
-
-        :param timeout:
-            Socket timeout in seconds for the request. This can be a
-            float or integer, which will set the same timeout value for
-            the socket connect and the socket read, or an instance of
-            :class:`urllib3.util.Timeout`, which gives you more fine-grained
-            control over your timeouts.
-        """
-        self.num_requests += 1
-
-        timeout_obj = self._get_timeout(timeout)
-        timeout_obj.start_connect()
-        conn.timeout = timeout_obj.connect_timeout
-
-        # Trigger any extra validation we need to do.
-        try:
-            self._validate_conn(conn)
-        except (SocketTimeout, BaseSSLError) as e:
-            # Py2 raises this as a BaseSSLError, Py3 raises it as socket timeout.
-            self._raise_timeout(err=e, url=url, timeout_value=conn.timeout)
-            raise
-
-        # conn.request() calls httplib.*.request, not the method in
-        # urllib3.request. It also calls makefile (recv) on the socket.
-        if chunked:
-            conn.request_chunked(method, url, **httplib_request_kw)
-        else:
-            conn.request(method, url, **httplib_request_kw)
-
-        # Reset the timeout for the recv() on the socket
-        read_timeout = timeout_obj.read_timeout
-
-        # App Engine doesn't have a sock attr
-        if getattr(conn, 'sock', None):
-            # In Python 3 socket.py will catch EAGAIN and return None when you
-            # try and read into the file pointer created by http.client, which
-            # instead raises a BadStatusLine exception. Instead of catching
-            # the exception and assuming all BadStatusLine exceptions are read
-            # timeouts, check for a zero timeout before making the request.
-            if read_timeout == 0:
-                raise ReadTimeoutError(
-                    self, url, "Read timed out. (read timeout=%s)" % read_timeout)
-            if read_timeout is Timeout.DEFAULT_TIMEOUT:
-                conn.sock.settimeout(socket.getdefaulttimeout())
-            else:  # None or a value
-                conn.sock.settimeout(read_timeout)
-
-        # Receive the response from the server
-        try:
-            try:  # Python 2.7, use buffering of HTTP responses
-                httplib_response = conn.getresponse(buffering=True)
-            except TypeError:  # Python 3
-                try:
-                    httplib_response = conn.getresponse()
-                except Exception as e:
-                    # Remove the TypeError from the exception chain in Python 3;
-                    # otherwise it looks like a programming error was the cause.
-                    six.raise_from(e, None)
-        except (SocketTimeout, BaseSSLError, SocketError) as e:
-            self._raise_timeout(err=e, url=url, timeout_value=read_timeout)
-            raise
-
-        # AppEngine doesn't have a version attr.
-        http_version = getattr(conn, '_http_vsn_str', 'HTTP/?')
-        log.debug("%s://%s:%s \"%s %s %s\" %s %s", self.scheme, self.host, self.port,
-                  method, url, http_version, httplib_response.status,
-                  httplib_response.length)
-
-        try:
-            assert_header_parsing(httplib_response.msg)
-        except (HeaderParsingError, TypeError) as hpe:  # Platform-specific: Python 3
-            log.warning(
-                'Failed to parse headers (url=%s): %s',
-                self._absolute_url(url), hpe, exc_info=True)
-
-        return httplib_response
-
-    def _absolute_url(self, path):
-        return Url(scheme=self.scheme, host=self.host, port=self.port, path=path).url
-
-    def close(self):
-        """
-        Close all pooled connections and disable the pool.
-        """
-        if self.pool is None:
-            return
-        # Disable access to the pool
-        old_pool, self.pool = self.pool, None
-
-        try:
-            while True:
-                conn = old_pool.get(block=False)
-                if conn:
-                    conn.close()
-
-        except queue.Empty:
-            pass  # Done.
-
-    def is_same_host(self, url):
-        """
-        Check if the given ``url`` is a member of the same host as this
-        connection pool.
-        """
-        if url.startswith('/'):
-            return True
-
-        # TODO: Add optional support for socket.gethostbyname checking.
-        scheme, host, port = get_host(url)
-
-        host = _ipv6_host(host, self.scheme)
-
-        # Use explicit default port for comparison when none is given
-        if self.port and not port:
-            port = port_by_scheme.get(scheme)
-        elif not self.port and port == port_by_scheme.get(scheme):
-            port = None
-
-        return (scheme, host, port) == (self.scheme, self.host, self.port)
-
-    def urlopen(self, method, url, body=None, headers=None, retries=None,
-                redirect=True, assert_same_host=True, timeout=_Default,
-                pool_timeout=None, release_conn=None, chunked=False,
-                body_pos=None, **response_kw):
-        """
-        Get a connection from the pool and perform an HTTP request. This is the
-        lowest level call for making a request, so you'll need to specify all
-        the raw details.
-
-        .. note::
-
-           More commonly, it's appropriate to use a convenience method provided
-           by :class:`.RequestMethods`, such as :meth:`request`.
-
-        .. note::
-
-           `release_conn` will only behave as expected if
-           `preload_content=False` because we want to make
-           `preload_content=False` the default behaviour someday soon without
-           breaking backwards compatibility.
-
-        :param method:
-            HTTP request method (such as GET, POST, PUT, etc.)
-
-        :param body:
-            Data to send in the request body (useful for creating
-            POST requests, see HTTPConnectionPool.post_url for
-            more convenience).
-
-        :param headers:
-            Dictionary of custom headers to send, such as User-Agent,
-            If-None-Match, etc. If None, pool headers are used. If provided,
-            these headers completely replace any pool-specific headers.
-
-        :param retries:
-            Configure the number of retries to allow before raising a
-            :class:`~urllib3.exceptions.MaxRetryError` exception.
-
-            Pass ``None`` to retry until you receive a response. Pass a
-            :class:`~urllib3.util.retry.Retry` object for fine-grained control
-            over different types of retries.
-            Pass an integer number to retry connection errors that many times,
-            but no other types of errors. Pass zero to never retry.
-
-            If ``False``, then retries are disabled and any exception is raised
-            immediately. Also, instead of raising a MaxRetryError on redirects,
-            the redirect response will be returned.
-
-        :type retries: :class:`~urllib3.util.retry.Retry`, False, or an int.
-
-        :param redirect:
-            If True, automatically handle redirects (status codes 301, 302,
-            303, 307, 308). Each redirect counts as a retry. Disabling retries
-            will disable redirect, too.
-
-        :param assert_same_host:
-            If ``True``, will make sure that the host of the pool requests is
-            consistent else will raise HostChangedError. When False, you can
-            use the pool on an HTTP proxy and request foreign hosts.
-
-        :param timeout:
-            If specified, overrides the default timeout for this one
-            request. It may be a float (in seconds) or an instance of
-            :class:`urllib3.util.Timeout`.
-
-        :param pool_timeout:
-            If set and the pool is set to block=True, then this method will
-            block for ``pool_timeout`` seconds and raise EmptyPoolError if no
-            connection is available within the time period.
-
-        :param release_conn:
-            If False, then the urlopen call will not release the connection
-            back into the pool once a response is received (but will release if
-            you read the entire contents of the response such as when
-            `preload_content=True`). This is useful if you're not preloading
-            the response's content immediately. You will need to call
-            ``r.release_conn()`` on the response ``r`` to return the connection
-            back into the pool. If None, it takes the value of
-            ``response_kw.get('preload_content', True)``.
-
-        :param chunked:
-            If True, urllib3 will send the body using chunked transfer
-            encoding. Otherwise, urllib3 will send the body using the standard
-            content-length form. Defaults to False.
-
-        :param int body_pos:
-            Position to seek to in file-like body in the event of a retry or
-            redirect. Typically this won't need to be set because urllib3 will
-            auto-populate the value when needed.
-
-        :param \\**response_kw:
-            Additional parameters are passed to
-            :meth:`urllib3.response.HTTPResponse.from_httplib`
-        """
-        if headers is None:
-            headers = self.headers
-
-        if not isinstance(retries, Retry):
-            retries = Retry.from_int(retries, redirect=redirect, default=self.retries)
-
-        if release_conn is None:
-            release_conn = response_kw.get('preload_content', True)
-
-        # Check host
-        if assert_same_host and not self.is_same_host(url):
-            raise HostChangedError(self, url, retries)
-
-        conn = None
-
-        # Track whether `conn` needs to be released before
-        # returning/raising/recursing. Update this variable if necessary, and
-        # leave `release_conn` constant throughout the function. That way, if
-        # the function recurses, the original value of `release_conn` will be
-        # passed down into the recursive call, and its value will be respected.
-        #
-        # See issue #651 [1] for details.
-        #
-        # [1] <https://github.com/shazow/urllib3/issues/651>
-        release_this_conn = release_conn
-
-        # Merge the proxy headers. Only do this in HTTP. We have to copy the
-        # headers dict so we can safely change it without those changes being
-        # reflected in anyone else's copy.
-        if self.scheme == 'http':
-            headers = headers.copy()
-            headers.update(self.proxy_headers)
-
-        # Must keep the exception bound to a separate variable or else Python 3
-        # complains about UnboundLocalError.
-        err = None
-
-        # Keep track of whether we cleanly exited the except block. This
-        # ensures we do proper cleanup in finally.
-        clean_exit = False
-
-        # Rewind body position, if needed. Record current position
-        # for future rewinds in the event of a redirect/retry.
-        body_pos = set_file_position(body, body_pos)
-
-        try:
-            # Request a connection from the queue.
-            timeout_obj = self._get_timeout(timeout)
-            conn = self._get_conn(timeout=pool_timeout)
-
-            conn.timeout = timeout_obj.connect_timeout
-
-            is_new_proxy_conn = self.proxy is not None and not getattr(conn, 'sock', None)
-            if is_new_proxy_conn:
-                self._prepare_proxy(conn)
-
-            # Make the request on the httplib connection object.
-            httplib_response = self._make_request(conn, method, url,
-                                                  timeout=timeout_obj,
-                                                  body=body, headers=headers,
-                                                  chunked=chunked)
-
-            # If we're going to release the connection in ``finally:``, then
-            # the response doesn't need to know about the connection. Otherwise
-            # it will also try to release it and we'll have a double-release
-            # mess.
-            response_conn = conn if not release_conn else None
-
-            # Pass method to Response for length checking
-            response_kw['request_method'] = method
-
-            # Import httplib's response into our own wrapper object
-            response = self.ResponseCls.from_httplib(httplib_response,
-                                                     pool=self,
-                                                     connection=response_conn,
-                                                     retries=retries,
-                                                     **response_kw)
-
-            # Everything went great!
-            clean_exit = True
-
-        except queue.Empty:
-            # Timed out by queue.
-            raise EmptyPoolError(self, "No pool connections are available.")
-
-        except (TimeoutError, HTTPException, SocketError, ProtocolError,
-                BaseSSLError, SSLError, CertificateError) as e:
-            # Discard the connection for these exceptions. It will be
-            # replaced during the next _get_conn() call.
-            clean_exit = False
-            if isinstance(e, (BaseSSLError, CertificateError)):
-                e = SSLError(e)
-            elif isinstance(e, (SocketError, NewConnectionError)) and self.proxy:
-                e = ProxyError('Cannot connect to proxy.', e)
-            elif isinstance(e, (SocketError, HTTPException)):
-                e = ProtocolError('Connection aborted.', e)
-
-            retries = retries.increment(method, url, error=e, _pool=self,
-                                        _stacktrace=sys.exc_info()[2])
-            retries.sleep()
-
-            # Keep track of the error for the retry warning.
-            err = e
-
-        finally:
-            if not clean_exit:
-                # We hit some kind of exception, handled or otherwise. We need
-                # to throw the connection away unless explicitly told not to.
-                # Close the connection, set the variable to None, and make sure
-                # we put the None back in the pool to avoid leaking it.
-                conn = conn and conn.close()
-                release_this_conn = True
-
-            if release_this_conn:
-                # Put the connection back to be reused. If the connection is
-                # expired then it will be None, which will get replaced with a
-                # fresh connection during _get_conn.
-                self._put_conn(conn)
-
-        if not conn:
-            # Try again
-            log.warning("Retrying (%r) after connection "
-                        "broken by '%r': %s", retries, err, url)
-            return self.urlopen(method, url, body, headers, retries,
-                                redirect, assert_same_host,
-                                timeout=timeout, pool_timeout=pool_timeout,
-                                release_conn=release_conn, body_pos=body_pos,
-                                **response_kw)
-
-        def drain_and_release_conn(response):
-            try:
-                # discard any remaining response body, the connection will be
-                # released back to the pool once the entire response is read
-                response.read()
-            except (TimeoutError, HTTPException, SocketError, ProtocolError,
-                    BaseSSLError, SSLError) as e:
-                pass
-
-        # Handle redirect?
-        redirect_location = redirect and response.get_redirect_location()
-        if redirect_location:
-            if response.status == 303:
-                method = 'GET'
-
-            try:
-                retries = retries.increment(method, url, response=response, _pool=self)
-            except MaxRetryError:
-                if retries.raise_on_redirect:
-                    # Drain and release the connection for this response, since
-                    # we're not returning it to be released manually.
-                    drain_and_release_conn(response)
-                    raise
-                return response
-
-            # drain and return the connection to the pool before recursing
-            drain_and_release_conn(response)
-
-            retries.sleep_for_retry(response)
-            log.debug("Redirecting %s -> %s", url, redirect_location)
-            return self.urlopen(
-                method, redirect_location, body, headers,
-                retries=retries, redirect=redirect,
-                assert_same_host=assert_same_host,
-                timeout=timeout, pool_timeout=pool_timeout,
-                release_conn=release_conn, body_pos=body_pos,
-                **response_kw)
-
-        # Check if we should retry the HTTP response.
-        has_retry_after = bool(response.getheader('Retry-After'))
-        if retries.is_retry(method, response.status, has_retry_after):
-            try:
-                retries = retries.increment(method, url, response=response, _pool=self)
-            except MaxRetryError:
-                if retries.raise_on_status:
-                    # Drain and release the connection for this response, since
-                    # we're not returning it to be released manually.
-                    drain_and_release_conn(response)
-                    raise
-                return response
-
-            # drain and return the connection to the pool before recursing
-            drain_and_release_conn(response)
-
-            retries.sleep(response)
-            log.debug("Retry: %s", url)
-            return self.urlopen(
-                method, url, body, headers,
-                retries=retries, redirect=redirect,
-                assert_same_host=assert_same_host,
-                timeout=timeout, pool_timeout=pool_timeout,
-                release_conn=release_conn,
-                body_pos=body_pos, **response_kw)
-
-        return response
-
-
-class HTTPSConnectionPool(HTTPConnectionPool):
-    """
-    Same as :class:`.HTTPConnectionPool`, but HTTPS.
-
-    When Python is compiled with the :mod:`ssl` module, then
-    :class:`.VerifiedHTTPSConnection` is used, which *can* verify certificates,
-    instead of :class:`.HTTPSConnection`.
-
-    :class:`.VerifiedHTTPSConnection` uses one of ``assert_fingerprint``,
-    ``assert_hostname`` and ``host`` in this order to verify connections.
-    If ``assert_hostname`` is False, no verification is done.
-
-    The ``key_file``, ``cert_file``, ``cert_reqs``, ``ca_certs``,
-    ``ca_cert_dir``, and ``ssl_version`` are only used if :mod:`ssl` is
-    available and are fed into :meth:`urllib3.util.ssl_wrap_socket` to upgrade
-    the connection socket into an SSL socket.
-    """
-
-    scheme = 'https'
-    ConnectionCls = HTTPSConnection
-
-    def __init__(self, host, port=None,
-                 strict=False, timeout=Timeout.DEFAULT_TIMEOUT, maxsize=1,
-                 block=False, headers=None, retries=None,
-                 _proxy=None, _proxy_headers=None,
-                 key_file=None, cert_file=None, cert_reqs=None,
-                 ca_certs=None, ssl_version=None,
-                 assert_hostname=None, assert_fingerprint=None,
-                 ca_cert_dir=None, **conn_kw):
-
-        HTTPConnectionPool.__init__(self, host, port, strict, timeout, maxsize,
-                                    block, headers, retries, _proxy, _proxy_headers,
-                                    **conn_kw)
-
-        if ca_certs and cert_reqs is None:
-            cert_reqs = 'CERT_REQUIRED'
-
-        self.key_file = key_file
-        self.cert_file = cert_file
-        self.cert_reqs = cert_reqs
-        self.ca_certs = ca_certs
-        self.ca_cert_dir = ca_cert_dir
-        self.ssl_version = ssl_version
-        self.assert_hostname = assert_hostname
-        self.assert_fingerprint = assert_fingerprint
-
-    def _prepare_conn(self, conn):
-        """
-        Prepare the ``connection`` for :meth:`urllib3.util.ssl_wrap_socket`
-        and establish the tunnel if proxy is used.
-        """
-
-        if isinstance(conn, VerifiedHTTPSConnection):
-            conn.set_cert(key_file=self.key_file,
-                          cert_file=self.cert_file,
-                          cert_reqs=self.cert_reqs,
-                          ca_certs=self.ca_certs,
-                          ca_cert_dir=self.ca_cert_dir,
-                          assert_hostname=self.assert_hostname,
-                          assert_fingerprint=self.assert_fingerprint)
-            conn.ssl_version = self.ssl_version
-        return conn
-
-    def _prepare_proxy(self, conn):
-        """
-        Establish tunnel connection early, because otherwise httplib
-        would improperly set Host: header to proxy's IP:port.
-        """
-        conn.set_tunnel(self._proxy_host, self.port, self.proxy_headers)
-        conn.connect()
-
-    def _new_conn(self):
-        """
-        Return a fresh :class:`httplib.HTTPSConnection`.
-        """
-        self.num_connections += 1
-        log.debug("Starting new HTTPS connection (%d): %s:%s",
-                  self.num_connections, self.host, self.port or "443")
-
-        if not self.ConnectionCls or self.ConnectionCls is DummyConnection:
-            raise SSLError("Can't connect to HTTPS URL because the SSL "
-                           "module is not available.")
-
-        actual_host = self.host
-        actual_port = self.port
-        if self.proxy is not None:
-            actual_host = self.proxy.host
-            actual_port = self.proxy.port
-
-        conn = self.ConnectionCls(host=actual_host, port=actual_port,
-                                  timeout=self.timeout.connect_timeout,
-                                  strict=self.strict, **self.conn_kw)
-
-        return self._prepare_conn(conn)
-
-    def _validate_conn(self, conn):
-        """
-        Called right before a request is made, after the socket is created.
-        """
-        super(HTTPSConnectionPool, self)._validate_conn(conn)
-
-        # Force connect early to allow us to validate the connection.
-        if not getattr(conn, 'sock', None):  # AppEngine might not have  `.sock`
-            conn.connect()
-
-        if not conn.is_verified:
-            warnings.warn((
-                'Unverified HTTPS request is being made. '
-                'Adding certificate verification is strongly advised. See: '
-                'https://urllib3.readthedocs.io/en/latest/advanced-usage.html'
-                '#ssl-warnings'),
-                InsecureRequestWarning)
-
-
-def connection_from_url(url, **kw):
-    """
-    Given a url, return an :class:`.ConnectionPool` instance of its host.
-
-    This is a shortcut for not having to parse out the scheme, host, and port
-    of the url before creating an :class:`.ConnectionPool` instance.
-
-    :param url:
-        Absolute URL string that must include the scheme. Port is optional.
-
-    :param \\**kw:
-        Passes additional parameters to the constructor of the appropriate
-        :class:`.ConnectionPool`. Useful for specifying things like
-        timeout, maxsize, headers, etc.
-
-    Example::
-
-        >>> conn = connection_from_url('http://google.com/')
-        >>> r = conn.request('GET', '/')
-    """
-    scheme, host, port = get_host(url)
-    port = port or port_by_scheme.get(scheme, 80)
-    if scheme == 'https':
-        return HTTPSConnectionPool(host, port=port, **kw)
-    else:
-        return HTTPConnectionPool(host, port=port, **kw)
-
-
-def _ipv6_host(host, scheme):
-    """
-    Process IPv6 address literals
-    """
-
-    # httplib doesn't like it when we include brackets in IPv6 addresses
-    # Specifically, if we include brackets but also pass the port then
-    # httplib crazily doubles up the square brackets on the Host header.
-    # Instead, we need to make sure we never pass ``None`` as the port.
-    # However, for backward compatibility reasons we can't actually
-    # *assert* that.  See http://bugs.python.org/issue28539
-    #
-    # Also if an IPv6 address literal has a zone identifier, the
-    # percent sign might be URIencoded, convert it back into ASCII
-    if host.startswith('[') and host.endswith(']'):
-        host = host.replace('%25', '%').strip('[]')
-    if scheme in NORMALIZABLE_SCHEMES:
-        host = host.lower()
-    return host
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/contrib/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/contrib/__init__.py
deleted file mode 100644
index e69de29..0000000
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/contrib/_appengine_environ.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/contrib/_appengine_environ.py
deleted file mode 100644
index f3e0094..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/contrib/_appengine_environ.py
+++ /dev/null
@@ -1,30 +0,0 @@
-"""
-This module provides means to detect the App Engine environment.
-"""
-
-import os
-
-
-def is_appengine():
-    return (is_local_appengine() or
-            is_prod_appengine() or
-            is_prod_appengine_mvms())
-
-
-def is_appengine_sandbox():
-    return is_appengine() and not is_prod_appengine_mvms()
-
-
-def is_local_appengine():
-    return ('APPENGINE_RUNTIME' in os.environ and
-            'Development/' in os.environ['SERVER_SOFTWARE'])
-
-
-def is_prod_appengine():
-    return ('APPENGINE_RUNTIME' in os.environ and
-            'Google App Engine/' in os.environ['SERVER_SOFTWARE'] and
-            not is_prod_appengine_mvms())
-
-
-def is_prod_appengine_mvms():
-    return os.environ.get('GAE_VM', False) == 'true'
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/contrib/_securetransport/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/contrib/_securetransport/__init__.py
deleted file mode 100644
index e69de29..0000000
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/contrib/_securetransport/bindings.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/contrib/_securetransport/bindings.py
deleted file mode 100644
index bcf41c0..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/contrib/_securetransport/bindings.py
+++ /dev/null
@@ -1,593 +0,0 @@
-"""
-This module uses ctypes to bind a whole bunch of functions and constants from
-SecureTransport. The goal here is to provide the low-level API to
-SecureTransport. These are essentially the C-level functions and constants, and
-they're pretty gross to work with.
-
-This code is a bastardised version of the code found in Will Bond's oscrypto
-library. An enormous debt is owed to him for blazing this trail for us. For
-that reason, this code should be considered to be covered both by urllib3's
-license and by oscrypto's:
-
-    Copyright (c) 2015-2016 Will Bond <will@wbond.net>
-
-    Permission is hereby granted, free of charge, to any person obtaining a
-    copy of this software and associated documentation files (the "Software"),
-    to deal in the Software without restriction, including without limitation
-    the rights to use, copy, modify, merge, publish, distribute, sublicense,
-    and/or sell copies of the Software, and to permit persons to whom the
-    Software is furnished to do so, subject to the following conditions:
-
-    The above copyright notice and this permission notice shall be included in
-    all copies or substantial portions of the Software.
-
-    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
-    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-    DEALINGS IN THE SOFTWARE.
-"""
-from __future__ import absolute_import
-
-import platform
-from ctypes.util import find_library
-from ctypes import (
-    c_void_p, c_int32, c_char_p, c_size_t, c_byte, c_uint32, c_ulong, c_long,
-    c_bool
-)
-from ctypes import CDLL, POINTER, CFUNCTYPE
-
-
-security_path = find_library('Security')
-if not security_path:
-    raise ImportError('The library Security could not be found')
-
-
-core_foundation_path = find_library('CoreFoundation')
-if not core_foundation_path:
-    raise ImportError('The library CoreFoundation could not be found')
-
-
-version = platform.mac_ver()[0]
-version_info = tuple(map(int, version.split('.')))
-if version_info < (10, 8):
-    raise OSError(
-        'Only OS X 10.8 and newer are supported, not %s.%s' % (
-            version_info[0], version_info[1]
-        )
-    )
-
-Security = CDLL(security_path, use_errno=True)
-CoreFoundation = CDLL(core_foundation_path, use_errno=True)
-
-Boolean = c_bool
-CFIndex = c_long
-CFStringEncoding = c_uint32
-CFData = c_void_p
-CFString = c_void_p
-CFArray = c_void_p
-CFMutableArray = c_void_p
-CFDictionary = c_void_p
-CFError = c_void_p
-CFType = c_void_p
-CFTypeID = c_ulong
-
-CFTypeRef = POINTER(CFType)
-CFAllocatorRef = c_void_p
-
-OSStatus = c_int32
-
-CFDataRef = POINTER(CFData)
-CFStringRef = POINTER(CFString)
-CFArrayRef = POINTER(CFArray)
-CFMutableArrayRef = POINTER(CFMutableArray)
-CFDictionaryRef = POINTER(CFDictionary)
-CFArrayCallBacks = c_void_p
-CFDictionaryKeyCallBacks = c_void_p
-CFDictionaryValueCallBacks = c_void_p
-
-SecCertificateRef = POINTER(c_void_p)
-SecExternalFormat = c_uint32
-SecExternalItemType = c_uint32
-SecIdentityRef = POINTER(c_void_p)
-SecItemImportExportFlags = c_uint32
-SecItemImportExportKeyParameters = c_void_p
-SecKeychainRef = POINTER(c_void_p)
-SSLProtocol = c_uint32
-SSLCipherSuite = c_uint32
-SSLContextRef = POINTER(c_void_p)
-SecTrustRef = POINTER(c_void_p)
-SSLConnectionRef = c_uint32
-SecTrustResultType = c_uint32
-SecTrustOptionFlags = c_uint32
-SSLProtocolSide = c_uint32
-SSLConnectionType = c_uint32
-SSLSessionOption = c_uint32
-
-
-try:
-    Security.SecItemImport.argtypes = [
-        CFDataRef,
-        CFStringRef,
-        POINTER(SecExternalFormat),
-        POINTER(SecExternalItemType),
-        SecItemImportExportFlags,
-        POINTER(SecItemImportExportKeyParameters),
-        SecKeychainRef,
-        POINTER(CFArrayRef),
-    ]
-    Security.SecItemImport.restype = OSStatus
-
-    Security.SecCertificateGetTypeID.argtypes = []
-    Security.SecCertificateGetTypeID.restype = CFTypeID
-
-    Security.SecIdentityGetTypeID.argtypes = []
-    Security.SecIdentityGetTypeID.restype = CFTypeID
-
-    Security.SecKeyGetTypeID.argtypes = []
-    Security.SecKeyGetTypeID.restype = CFTypeID
-
-    Security.SecCertificateCreateWithData.argtypes = [
-        CFAllocatorRef,
-        CFDataRef
-    ]
-    Security.SecCertificateCreateWithData.restype = SecCertificateRef
-
-    Security.SecCertificateCopyData.argtypes = [
-        SecCertificateRef
-    ]
-    Security.SecCertificateCopyData.restype = CFDataRef
-
-    Security.SecCopyErrorMessageString.argtypes = [
-        OSStatus,
-        c_void_p
-    ]
-    Security.SecCopyErrorMessageString.restype = CFStringRef
-
-    Security.SecIdentityCreateWithCertificate.argtypes = [
-        CFTypeRef,
-        SecCertificateRef,
-        POINTER(SecIdentityRef)
-    ]
-    Security.SecIdentityCreateWithCertificate.restype = OSStatus
-
-    Security.SecKeychainCreate.argtypes = [
-        c_char_p,
-        c_uint32,
-        c_void_p,
-        Boolean,
-        c_void_p,
-        POINTER(SecKeychainRef)
-    ]
-    Security.SecKeychainCreate.restype = OSStatus
-
-    Security.SecKeychainDelete.argtypes = [
-        SecKeychainRef
-    ]
-    Security.SecKeychainDelete.restype = OSStatus
-
-    Security.SecPKCS12Import.argtypes = [
-        CFDataRef,
-        CFDictionaryRef,
-        POINTER(CFArrayRef)
-    ]
-    Security.SecPKCS12Import.restype = OSStatus
-
-    SSLReadFunc = CFUNCTYPE(OSStatus, SSLConnectionRef, c_void_p, POINTER(c_size_t))
-    SSLWriteFunc = CFUNCTYPE(OSStatus, SSLConnectionRef, POINTER(c_byte), POINTER(c_size_t))
-
-    Security.SSLSetIOFuncs.argtypes = [
-        SSLContextRef,
-        SSLReadFunc,
-        SSLWriteFunc
-    ]
-    Security.SSLSetIOFuncs.restype = OSStatus
-
-    Security.SSLSetPeerID.argtypes = [
-        SSLContextRef,
-        c_char_p,
-        c_size_t
-    ]
-    Security.SSLSetPeerID.restype = OSStatus
-
-    Security.SSLSetCertificate.argtypes = [
-        SSLContextRef,
-        CFArrayRef
-    ]
-    Security.SSLSetCertificate.restype = OSStatus
-
-    Security.SSLSetCertificateAuthorities.argtypes = [
-        SSLContextRef,
-        CFTypeRef,
-        Boolean
-    ]
-    Security.SSLSetCertificateAuthorities.restype = OSStatus
-
-    Security.SSLSetConnection.argtypes = [
-        SSLContextRef,
-        SSLConnectionRef
-    ]
-    Security.SSLSetConnection.restype = OSStatus
-
-    Security.SSLSetPeerDomainName.argtypes = [
-        SSLContextRef,
-        c_char_p,
-        c_size_t
-    ]
-    Security.SSLSetPeerDomainName.restype = OSStatus
-
-    Security.SSLHandshake.argtypes = [
-        SSLContextRef
-    ]
-    Security.SSLHandshake.restype = OSStatus
-
-    Security.SSLRead.argtypes = [
-        SSLContextRef,
-        c_char_p,
-        c_size_t,
-        POINTER(c_size_t)
-    ]
-    Security.SSLRead.restype = OSStatus
-
-    Security.SSLWrite.argtypes = [
-        SSLContextRef,
-        c_char_p,
-        c_size_t,
-        POINTER(c_size_t)
-    ]
-    Security.SSLWrite.restype = OSStatus
-
-    Security.SSLClose.argtypes = [
-        SSLContextRef
-    ]
-    Security.SSLClose.restype = OSStatus
-
-    Security.SSLGetNumberSupportedCiphers.argtypes = [
-        SSLContextRef,
-        POINTER(c_size_t)
-    ]
-    Security.SSLGetNumberSupportedCiphers.restype = OSStatus
-
-    Security.SSLGetSupportedCiphers.argtypes = [
-        SSLContextRef,
-        POINTER(SSLCipherSuite),
-        POINTER(c_size_t)
-    ]
-    Security.SSLGetSupportedCiphers.restype = OSStatus
-
-    Security.SSLSetEnabledCiphers.argtypes = [
-        SSLContextRef,
-        POINTER(SSLCipherSuite),
-        c_size_t
-    ]
-    Security.SSLSetEnabledCiphers.restype = OSStatus
-
-    Security.SSLGetNumberEnabledCiphers.argtype = [
-        SSLContextRef,
-        POINTER(c_size_t)
-    ]
-    Security.SSLGetNumberEnabledCiphers.restype = OSStatus
-
-    Security.SSLGetEnabledCiphers.argtypes = [
-        SSLContextRef,
-        POINTER(SSLCipherSuite),
-        POINTER(c_size_t)
-    ]
-    Security.SSLGetEnabledCiphers.restype = OSStatus
-
-    Security.SSLGetNegotiatedCipher.argtypes = [
-        SSLContextRef,
-        POINTER(SSLCipherSuite)
-    ]
-    Security.SSLGetNegotiatedCipher.restype = OSStatus
-
-    Security.SSLGetNegotiatedProtocolVersion.argtypes = [
-        SSLContextRef,
-        POINTER(SSLProtocol)
-    ]
-    Security.SSLGetNegotiatedProtocolVersion.restype = OSStatus
-
-    Security.SSLCopyPeerTrust.argtypes = [
-        SSLContextRef,
-        POINTER(SecTrustRef)
-    ]
-    Security.SSLCopyPeerTrust.restype = OSStatus
-
-    Security.SecTrustSetAnchorCertificates.argtypes = [
-        SecTrustRef,
-        CFArrayRef
-    ]
-    Security.SecTrustSetAnchorCertificates.restype = OSStatus
-
-    Security.SecTrustSetAnchorCertificatesOnly.argstypes = [
-        SecTrustRef,
-        Boolean
-    ]
-    Security.SecTrustSetAnchorCertificatesOnly.restype = OSStatus
-
-    Security.SecTrustEvaluate.argtypes = [
-        SecTrustRef,
-        POINTER(SecTrustResultType)
-    ]
-    Security.SecTrustEvaluate.restype = OSStatus
-
-    Security.SecTrustGetCertificateCount.argtypes = [
-        SecTrustRef
-    ]
-    Security.SecTrustGetCertificateCount.restype = CFIndex
-
-    Security.SecTrustGetCertificateAtIndex.argtypes = [
-        SecTrustRef,
-        CFIndex
-    ]
-    Security.SecTrustGetCertificateAtIndex.restype = SecCertificateRef
-
-    Security.SSLCreateContext.argtypes = [
-        CFAllocatorRef,
-        SSLProtocolSide,
-        SSLConnectionType
-    ]
-    Security.SSLCreateContext.restype = SSLContextRef
-
-    Security.SSLSetSessionOption.argtypes = [
-        SSLContextRef,
-        SSLSessionOption,
-        Boolean
-    ]
-    Security.SSLSetSessionOption.restype = OSStatus
-
-    Security.SSLSetProtocolVersionMin.argtypes = [
-        SSLContextRef,
-        SSLProtocol
-    ]
-    Security.SSLSetProtocolVersionMin.restype = OSStatus
-
-    Security.SSLSetProtocolVersionMax.argtypes = [
-        SSLContextRef,
-        SSLProtocol
-    ]
-    Security.SSLSetProtocolVersionMax.restype = OSStatus
-
-    Security.SecCopyErrorMessageString.argtypes = [
-        OSStatus,
-        c_void_p
-    ]
-    Security.SecCopyErrorMessageString.restype = CFStringRef
-
-    Security.SSLReadFunc = SSLReadFunc
-    Security.SSLWriteFunc = SSLWriteFunc
-    Security.SSLContextRef = SSLContextRef
-    Security.SSLProtocol = SSLProtocol
-    Security.SSLCipherSuite = SSLCipherSuite
-    Security.SecIdentityRef = SecIdentityRef
-    Security.SecKeychainRef = SecKeychainRef
-    Security.SecTrustRef = SecTrustRef
-    Security.SecTrustResultType = SecTrustResultType
-    Security.SecExternalFormat = SecExternalFormat
-    Security.OSStatus = OSStatus
-
-    Security.kSecImportExportPassphrase = CFStringRef.in_dll(
-        Security, 'kSecImportExportPassphrase'
-    )
-    Security.kSecImportItemIdentity = CFStringRef.in_dll(
-        Security, 'kSecImportItemIdentity'
-    )
-
-    # CoreFoundation time!
-    CoreFoundation.CFRetain.argtypes = [
-        CFTypeRef
-    ]
-    CoreFoundation.CFRetain.restype = CFTypeRef
-
-    CoreFoundation.CFRelease.argtypes = [
-        CFTypeRef
-    ]
-    CoreFoundation.CFRelease.restype = None
-
-    CoreFoundation.CFGetTypeID.argtypes = [
-        CFTypeRef
-    ]
-    CoreFoundation.CFGetTypeID.restype = CFTypeID
-
-    CoreFoundation.CFStringCreateWithCString.argtypes = [
-        CFAllocatorRef,
-        c_char_p,
-        CFStringEncoding
-    ]
-    CoreFoundation.CFStringCreateWithCString.restype = CFStringRef
-
-    CoreFoundation.CFStringGetCStringPtr.argtypes = [
-        CFStringRef,
-        CFStringEncoding
-    ]
-    CoreFoundation.CFStringGetCStringPtr.restype = c_char_p
-
-    CoreFoundation.CFStringGetCString.argtypes = [
-        CFStringRef,
-        c_char_p,
-        CFIndex,
-        CFStringEncoding
-    ]
-    CoreFoundation.CFStringGetCString.restype = c_bool
-
-    CoreFoundation.CFDataCreate.argtypes = [
-        CFAllocatorRef,
-        c_char_p,
-        CFIndex
-    ]
-    CoreFoundation.CFDataCreate.restype = CFDataRef
-
-    CoreFoundation.CFDataGetLength.argtypes = [
-        CFDataRef
-    ]
-    CoreFoundation.CFDataGetLength.restype = CFIndex
-
-    CoreFoundation.CFDataGetBytePtr.argtypes = [
-        CFDataRef
-    ]
-    CoreFoundation.CFDataGetBytePtr.restype = c_void_p
-
-    CoreFoundation.CFDictionaryCreate.argtypes = [
-        CFAllocatorRef,
-        POINTER(CFTypeRef),
-        POINTER(CFTypeRef),
-        CFIndex,
-        CFDictionaryKeyCallBacks,
-        CFDictionaryValueCallBacks
-    ]
-    CoreFoundation.CFDictionaryCreate.restype = CFDictionaryRef
-
-    CoreFoundation.CFDictionaryGetValue.argtypes = [
-        CFDictionaryRef,
-        CFTypeRef
-    ]
-    CoreFoundation.CFDictionaryGetValue.restype = CFTypeRef
-
-    CoreFoundation.CFArrayCreate.argtypes = [
-        CFAllocatorRef,
-        POINTER(CFTypeRef),
-        CFIndex,
-        CFArrayCallBacks,
-    ]
-    CoreFoundation.CFArrayCreate.restype = CFArrayRef
-
-    CoreFoundation.CFArrayCreateMutable.argtypes = [
-        CFAllocatorRef,
-        CFIndex,
-        CFArrayCallBacks
-    ]
-    CoreFoundation.CFArrayCreateMutable.restype = CFMutableArrayRef
-
-    CoreFoundation.CFArrayAppendValue.argtypes = [
-        CFMutableArrayRef,
-        c_void_p
-    ]
-    CoreFoundation.CFArrayAppendValue.restype = None
-
-    CoreFoundation.CFArrayGetCount.argtypes = [
-        CFArrayRef
-    ]
-    CoreFoundation.CFArrayGetCount.restype = CFIndex
-
-    CoreFoundation.CFArrayGetValueAtIndex.argtypes = [
-        CFArrayRef,
-        CFIndex
-    ]
-    CoreFoundation.CFArrayGetValueAtIndex.restype = c_void_p
-
-    CoreFoundation.kCFAllocatorDefault = CFAllocatorRef.in_dll(
-        CoreFoundation, 'kCFAllocatorDefault'
-    )
-    CoreFoundation.kCFTypeArrayCallBacks = c_void_p.in_dll(CoreFoundation, 'kCFTypeArrayCallBacks')
-    CoreFoundation.kCFTypeDictionaryKeyCallBacks = c_void_p.in_dll(
-        CoreFoundation, 'kCFTypeDictionaryKeyCallBacks'
-    )
-    CoreFoundation.kCFTypeDictionaryValueCallBacks = c_void_p.in_dll(
-        CoreFoundation, 'kCFTypeDictionaryValueCallBacks'
-    )
-
-    CoreFoundation.CFTypeRef = CFTypeRef
-    CoreFoundation.CFArrayRef = CFArrayRef
-    CoreFoundation.CFStringRef = CFStringRef
-    CoreFoundation.CFDictionaryRef = CFDictionaryRef
-
-except (AttributeError):
-    raise ImportError('Error initializing ctypes')
-
-
-class CFConst(object):
-    """
-    A class object that acts as essentially a namespace for CoreFoundation
-    constants.
-    """
-    kCFStringEncodingUTF8 = CFStringEncoding(0x08000100)
-
-
-class SecurityConst(object):
-    """
-    A class object that acts as essentially a namespace for Security constants.
-    """
-    kSSLSessionOptionBreakOnServerAuth = 0
-
-    kSSLProtocol2 = 1
-    kSSLProtocol3 = 2
-    kTLSProtocol1 = 4
-    kTLSProtocol11 = 7
-    kTLSProtocol12 = 8
-
-    kSSLClientSide = 1
-    kSSLStreamType = 0
-
-    kSecFormatPEMSequence = 10
-
-    kSecTrustResultInvalid = 0
-    kSecTrustResultProceed = 1
-    # This gap is present on purpose: this was kSecTrustResultConfirm, which
-    # is deprecated.
-    kSecTrustResultDeny = 3
-    kSecTrustResultUnspecified = 4
-    kSecTrustResultRecoverableTrustFailure = 5
-    kSecTrustResultFatalTrustFailure = 6
-    kSecTrustResultOtherError = 7
-
-    errSSLProtocol = -9800
-    errSSLWouldBlock = -9803
-    errSSLClosedGraceful = -9805
-    errSSLClosedNoNotify = -9816
-    errSSLClosedAbort = -9806
-
-    errSSLXCertChainInvalid = -9807
-    errSSLCrypto = -9809
-    errSSLInternal = -9810
-    errSSLCertExpired = -9814
-    errSSLCertNotYetValid = -9815
-    errSSLUnknownRootCert = -9812
-    errSSLNoRootCert = -9813
-    errSSLHostNameMismatch = -9843
-    errSSLPeerHandshakeFail = -9824
-    errSSLPeerUserCancelled = -9839
-    errSSLWeakPeerEphemeralDHKey = -9850
-    errSSLServerAuthCompleted = -9841
-    errSSLRecordOverflow = -9847
-
-    errSecVerifyFailed = -67808
-    errSecNoTrustSettings = -25263
-    errSecItemNotFound = -25300
-    errSecInvalidTrustSettings = -25262
-
-    # Cipher suites. We only pick the ones our default cipher string allows.
-    TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 = 0xC02C
-    TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 = 0xC030
-    TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 = 0xC02B
-    TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 = 0xC02F
-    TLS_DHE_DSS_WITH_AES_256_GCM_SHA384 = 0x00A3
-    TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 = 0x009F
-    TLS_DHE_DSS_WITH_AES_128_GCM_SHA256 = 0x00A2
-    TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 = 0x009E
-    TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 = 0xC024
-    TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 = 0xC028
-    TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA = 0xC00A
-    TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA = 0xC014
-    TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 = 0x006B
-    TLS_DHE_DSS_WITH_AES_256_CBC_SHA256 = 0x006A
-    TLS_DHE_RSA_WITH_AES_256_CBC_SHA = 0x0039
-    TLS_DHE_DSS_WITH_AES_256_CBC_SHA = 0x0038
-    TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 = 0xC023
-    TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 = 0xC027
-    TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA = 0xC009
-    TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA = 0xC013
-    TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 = 0x0067
-    TLS_DHE_DSS_WITH_AES_128_CBC_SHA256 = 0x0040
-    TLS_DHE_RSA_WITH_AES_128_CBC_SHA = 0x0033
-    TLS_DHE_DSS_WITH_AES_128_CBC_SHA = 0x0032
-    TLS_RSA_WITH_AES_256_GCM_SHA384 = 0x009D
-    TLS_RSA_WITH_AES_128_GCM_SHA256 = 0x009C
-    TLS_RSA_WITH_AES_256_CBC_SHA256 = 0x003D
-    TLS_RSA_WITH_AES_128_CBC_SHA256 = 0x003C
-    TLS_RSA_WITH_AES_256_CBC_SHA = 0x0035
-    TLS_RSA_WITH_AES_128_CBC_SHA = 0x002F
-    TLS_AES_128_GCM_SHA256 = 0x1301
-    TLS_AES_256_GCM_SHA384 = 0x1302
-    TLS_CHACHA20_POLY1305_SHA256 = 0x1303
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/contrib/_securetransport/low_level.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/contrib/_securetransport/low_level.py
deleted file mode 100644
index b13cd9e..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/contrib/_securetransport/low_level.py
+++ /dev/null
@@ -1,346 +0,0 @@
-"""
-Low-level helpers for the SecureTransport bindings.
-
-These are Python functions that are not directly related to the high-level APIs
-but are necessary to get them to work. They include a whole bunch of low-level
-CoreFoundation messing about and memory management. The concerns in this module
-are almost entirely about trying to avoid memory leaks and providing
-appropriate and useful assistance to the higher-level code.
-"""
-import base64
-import ctypes
-import itertools
-import re
-import os
-import ssl
-import tempfile
-
-from .bindings import Security, CoreFoundation, CFConst
-
-
-# This regular expression is used to grab PEM data out of a PEM bundle.
-_PEM_CERTS_RE = re.compile(
-    b"-----BEGIN CERTIFICATE-----\n(.*?)\n-----END CERTIFICATE-----", re.DOTALL
-)
-
-
-def _cf_data_from_bytes(bytestring):
-    """
-    Given a bytestring, create a CFData object from it. This CFData object must
-    be CFReleased by the caller.
-    """
-    return CoreFoundation.CFDataCreate(
-        CoreFoundation.kCFAllocatorDefault, bytestring, len(bytestring)
-    )
-
-
-def _cf_dictionary_from_tuples(tuples):
-    """
-    Given a list of Python tuples, create an associated CFDictionary.
-    """
-    dictionary_size = len(tuples)
-
-    # We need to get the dictionary keys and values out in the same order.
-    keys = (t[0] for t in tuples)
-    values = (t[1] for t in tuples)
-    cf_keys = (CoreFoundation.CFTypeRef * dictionary_size)(*keys)
-    cf_values = (CoreFoundation.CFTypeRef * dictionary_size)(*values)
-
-    return CoreFoundation.CFDictionaryCreate(
-        CoreFoundation.kCFAllocatorDefault,
-        cf_keys,
-        cf_values,
-        dictionary_size,
-        CoreFoundation.kCFTypeDictionaryKeyCallBacks,
-        CoreFoundation.kCFTypeDictionaryValueCallBacks,
-    )
-
-
-def _cf_string_to_unicode(value):
-    """
-    Creates a Unicode string from a CFString object. Used entirely for error
-    reporting.
-
-    Yes, it annoys me quite a lot that this function is this complex.
-    """
-    value_as_void_p = ctypes.cast(value, ctypes.POINTER(ctypes.c_void_p))
-
-    string = CoreFoundation.CFStringGetCStringPtr(
-        value_as_void_p,
-        CFConst.kCFStringEncodingUTF8
-    )
-    if string is None:
-        buffer = ctypes.create_string_buffer(1024)
-        result = CoreFoundation.CFStringGetCString(
-            value_as_void_p,
-            buffer,
-            1024,
-            CFConst.kCFStringEncodingUTF8
-        )
-        if not result:
-            raise OSError('Error copying C string from CFStringRef')
-        string = buffer.value
-    if string is not None:
-        string = string.decode('utf-8')
-    return string
-
-
-def _assert_no_error(error, exception_class=None):
-    """
-    Checks the return code and throws an exception if there is an error to
-    report
-    """
-    if error == 0:
-        return
-
-    cf_error_string = Security.SecCopyErrorMessageString(error, None)
-    output = _cf_string_to_unicode(cf_error_string)
-    CoreFoundation.CFRelease(cf_error_string)
-
-    if output is None or output == u'':
-        output = u'OSStatus %s' % error
-
-    if exception_class is None:
-        exception_class = ssl.SSLError
-
-    raise exception_class(output)
-
-
-def _cert_array_from_pem(pem_bundle):
-    """
-    Given a bundle of certs in PEM format, turns them into a CFArray of certs
-    that can be used to validate a cert chain.
-    """
-    # Normalize the PEM bundle's line endings.
-    pem_bundle = pem_bundle.replace(b"\r\n", b"\n")
-
-    der_certs = [
-        base64.b64decode(match.group(1))
-        for match in _PEM_CERTS_RE.finditer(pem_bundle)
-    ]
-    if not der_certs:
-        raise ssl.SSLError("No root certificates specified")
-
-    cert_array = CoreFoundation.CFArrayCreateMutable(
-        CoreFoundation.kCFAllocatorDefault,
-        0,
-        ctypes.byref(CoreFoundation.kCFTypeArrayCallBacks)
-    )
-    if not cert_array:
-        raise ssl.SSLError("Unable to allocate memory!")
-
-    try:
-        for der_bytes in der_certs:
-            certdata = _cf_data_from_bytes(der_bytes)
-            if not certdata:
-                raise ssl.SSLError("Unable to allocate memory!")
-            cert = Security.SecCertificateCreateWithData(
-                CoreFoundation.kCFAllocatorDefault, certdata
-            )
-            CoreFoundation.CFRelease(certdata)
-            if not cert:
-                raise ssl.SSLError("Unable to build cert object!")
-
-            CoreFoundation.CFArrayAppendValue(cert_array, cert)
-            CoreFoundation.CFRelease(cert)
-    except Exception:
-        # We need to free the array before the exception bubbles further.
-        # We only want to do that if an error occurs: otherwise, the caller
-        # should free.
-        CoreFoundation.CFRelease(cert_array)
-
-    return cert_array
-
-
-def _is_cert(item):
-    """
-    Returns True if a given CFTypeRef is a certificate.
-    """
-    expected = Security.SecCertificateGetTypeID()
-    return CoreFoundation.CFGetTypeID(item) == expected
-
-
-def _is_identity(item):
-    """
-    Returns True if a given CFTypeRef is an identity.
-    """
-    expected = Security.SecIdentityGetTypeID()
-    return CoreFoundation.CFGetTypeID(item) == expected
-
-
-def _temporary_keychain():
-    """
-    This function creates a temporary Mac keychain that we can use to work with
-    credentials. This keychain uses a one-time password and a temporary file to
-    store the data. We expect to have one keychain per socket. The returned
-    SecKeychainRef must be freed by the caller, including calling
-    SecKeychainDelete.
-
-    Returns a tuple of the SecKeychainRef and the path to the temporary
-    directory that contains it.
-    """
-    # Unfortunately, SecKeychainCreate requires a path to a keychain. This
-    # means we cannot use mkstemp to use a generic temporary file. Instead,
-    # we're going to create a temporary directory and a filename to use there.
-    # This filename will be 8 random bytes expanded into base64. We also need
-    # some random bytes to password-protect the keychain we're creating, so we
-    # ask for 40 random bytes.
-    random_bytes = os.urandom(40)
-    filename = base64.b16encode(random_bytes[:8]).decode('utf-8')
-    password = base64.b16encode(random_bytes[8:])  # Must be valid UTF-8
-    tempdirectory = tempfile.mkdtemp()
-
-    keychain_path = os.path.join(tempdirectory, filename).encode('utf-8')
-
-    # We now want to create the keychain itself.
-    keychain = Security.SecKeychainRef()
-    status = Security.SecKeychainCreate(
-        keychain_path,
-        len(password),
-        password,
-        False,
-        None,
-        ctypes.byref(keychain)
-    )
-    _assert_no_error(status)
-
-    # Having created the keychain, we want to pass it off to the caller.
-    return keychain, tempdirectory
-
-
-def _load_items_from_file(keychain, path):
-    """
-    Given a single file, loads all the trust objects from it into arrays and
-    the keychain.
-    Returns a tuple of lists: the first list is a list of identities, the
-    second a list of certs.
-    """
-    certificates = []
-    identities = []
-    result_array = None
-
-    with open(path, 'rb') as f:
-        raw_filedata = f.read()
-
-    try:
-        filedata = CoreFoundation.CFDataCreate(
-            CoreFoundation.kCFAllocatorDefault,
-            raw_filedata,
-            len(raw_filedata)
-        )
-        result_array = CoreFoundation.CFArrayRef()
-        result = Security.SecItemImport(
-            filedata,  # cert data
-            None,  # Filename, leaving it out for now
-            None,  # What the type of the file is, we don't care
-            None,  # what's in the file, we don't care
-            0,  # import flags
-            None,  # key params, can include passphrase in the future
-            keychain,  # The keychain to insert into
-            ctypes.byref(result_array)  # Results
-        )
-        _assert_no_error(result)
-
-        # A CFArray is not very useful to us as an intermediary
-        # representation, so we are going to extract the objects we want
-        # and then free the array. We don't need to keep hold of keys: the
-        # keychain already has them!
-        result_count = CoreFoundation.CFArrayGetCount(result_array)
-        for index in range(result_count):
-            item = CoreFoundation.CFArrayGetValueAtIndex(
-                result_array, index
-            )
-            item = ctypes.cast(item, CoreFoundation.CFTypeRef)
-
-            if _is_cert(item):
-                CoreFoundation.CFRetain(item)
-                certificates.append(item)
-            elif _is_identity(item):
-                CoreFoundation.CFRetain(item)
-                identities.append(item)
-    finally:
-        if result_array:
-            CoreFoundation.CFRelease(result_array)
-
-        CoreFoundation.CFRelease(filedata)
-
-    return (identities, certificates)
-
-
-def _load_client_cert_chain(keychain, *paths):
-    """
-    Load certificates and maybe keys from a number of files. Has the end goal
-    of returning a CFArray containing one SecIdentityRef, and then zero or more
-    SecCertificateRef objects, suitable for use as a client certificate trust
-    chain.
-    """
-    # Ok, the strategy.
-    #
-    # This relies on knowing that macOS will not give you a SecIdentityRef
-    # unless you have imported a key into a keychain. This is a somewhat
-    # artificial limitation of macOS (for example, it doesn't necessarily
-    # affect iOS), but there is nothing inside Security.framework that lets you
-    # get a SecIdentityRef without having a key in a keychain.
-    #
-    # So the policy here is we take all the files and iterate them in order.
-    # Each one will use SecItemImport to have one or more objects loaded from
-    # it. We will also point at a keychain that macOS can use to work with the
-    # private key.
-    #
-    # Once we have all the objects, we'll check what we actually have. If we
-    # already have a SecIdentityRef in hand, fab: we'll use that. Otherwise,
-    # we'll take the first certificate (which we assume to be our leaf) and
-    # ask the keychain to give us a SecIdentityRef with that cert's associated
-    # key.
-    #
-    # We'll then return a CFArray containing the trust chain: one
-    # SecIdentityRef and then zero-or-more SecCertificateRef objects. The
-    # responsibility for freeing this CFArray will be with the caller. This
-    # CFArray must remain alive for the entire connection, so in practice it
-    # will be stored with a single SSLSocket, along with the reference to the
-    # keychain.
-    certificates = []
-    identities = []
-
-    # Filter out bad paths.
-    paths = (path for path in paths if path)
-
-    try:
-        for file_path in paths:
-            new_identities, new_certs = _load_items_from_file(
-                keychain, file_path
-            )
-            identities.extend(new_identities)
-            certificates.extend(new_certs)
-
-        # Ok, we have everything. The question is: do we have an identity? If
-        # not, we want to grab one from the first cert we have.
-        if not identities:
-            new_identity = Security.SecIdentityRef()
-            status = Security.SecIdentityCreateWithCertificate(
-                keychain,
-                certificates[0],
-                ctypes.byref(new_identity)
-            )
-            _assert_no_error(status)
-            identities.append(new_identity)
-
-            # We now want to release the original certificate, as we no longer
-            # need it.
-            CoreFoundation.CFRelease(certificates.pop(0))
-
-        # We now need to build a new CFArray that holds the trust chain.
-        trust_chain = CoreFoundation.CFArrayCreateMutable(
-            CoreFoundation.kCFAllocatorDefault,
-            0,
-            ctypes.byref(CoreFoundation.kCFTypeArrayCallBacks),
-        )
-        for item in itertools.chain(identities, certificates):
-            # ArrayAppendValue does a CFRetain on the item. That's fine,
-            # because the finally block will release our other refs to them.
-            CoreFoundation.CFArrayAppendValue(trust_chain, item)
-
-        return trust_chain
-    finally:
-        for obj in itertools.chain(identities, certificates):
-            CoreFoundation.CFRelease(obj)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/contrib/appengine.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/contrib/appengine.py
deleted file mode 100644
index 9b42952..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/contrib/appengine.py
+++ /dev/null
@@ -1,289 +0,0 @@
-"""
-This module provides a pool manager that uses Google App Engine's
-`URLFetch Service <https://cloud.google.com/appengine/docs/python/urlfetch>`_.
-
-Example usage::
-
-    from pip._vendor.urllib3 import PoolManager
-    from pip._vendor.urllib3.contrib.appengine import AppEngineManager, is_appengine_sandbox
-
-    if is_appengine_sandbox():
-        # AppEngineManager uses AppEngine's URLFetch API behind the scenes
-        http = AppEngineManager()
-    else:
-        # PoolManager uses a socket-level API behind the scenes
-        http = PoolManager()
-
-    r = http.request('GET', 'https://google.com/')
-
-There are `limitations <https://cloud.google.com/appengine/docs/python/\
-urlfetch/#Python_Quotas_and_limits>`_ to the URLFetch service and it may not be
-the best choice for your application. There are three options for using
-urllib3 on Google App Engine:
-
-1. You can use :class:`AppEngineManager` with URLFetch. URLFetch is
-   cost-effective in many circumstances as long as your usage is within the
-   limitations.
-2. You can use a normal :class:`~urllib3.PoolManager` by enabling sockets.
-   Sockets also have `limitations and restrictions
-   <https://cloud.google.com/appengine/docs/python/sockets/\
-   #limitations-and-restrictions>`_ and have a lower free quota than URLFetch.
-   To use sockets, be sure to specify the following in your ``app.yaml``::
-
-        env_variables:
-            GAE_USE_SOCKETS_HTTPLIB : 'true'
-
-3. If you are using `App Engine Flexible
-<https://cloud.google.com/appengine/docs/flexible/>`_, you can use the standard
-:class:`PoolManager` without any configuration or special environment variables.
-"""
-
-from __future__ import absolute_import
-import io
-import logging
-import warnings
-from ..packages.six.moves.urllib.parse import urljoin
-
-from ..exceptions import (
-    HTTPError,
-    HTTPWarning,
-    MaxRetryError,
-    ProtocolError,
-    TimeoutError,
-    SSLError
-)
-
-from ..request import RequestMethods
-from ..response import HTTPResponse
-from ..util.timeout import Timeout
-from ..util.retry import Retry
-from . import _appengine_environ
-
-try:
-    from google.appengine.api import urlfetch
-except ImportError:
-    urlfetch = None
-
-
-log = logging.getLogger(__name__)
-
-
-class AppEnginePlatformWarning(HTTPWarning):
-    pass
-
-
-class AppEnginePlatformError(HTTPError):
-    pass
-
-
-class AppEngineManager(RequestMethods):
-    """
-    Connection manager for Google App Engine sandbox applications.
-
-    This manager uses the URLFetch service directly instead of using the
-    emulated httplib, and is subject to URLFetch limitations as described in
-    the App Engine documentation `here
-    <https://cloud.google.com/appengine/docs/python/urlfetch>`_.
-
-    Notably it will raise an :class:`AppEnginePlatformError` if:
-        * URLFetch is not available.
-        * If you attempt to use this on App Engine Flexible, as full socket
-          support is available.
-        * If a request size is more than 10 megabytes.
-        * If a response size is more than 32 megabtyes.
-        * If you use an unsupported request method such as OPTIONS.
-
-    Beyond those cases, it will raise normal urllib3 errors.
-    """
-
-    def __init__(self, headers=None, retries=None, validate_certificate=True,
-                 urlfetch_retries=True):
-        if not urlfetch:
-            raise AppEnginePlatformError(
-                "URLFetch is not available in this environment.")
-
-        if is_prod_appengine_mvms():
-            raise AppEnginePlatformError(
-                "Use normal urllib3.PoolManager instead of AppEngineManager"
-                "on Managed VMs, as using URLFetch is not necessary in "
-                "this environment.")
-
-        warnings.warn(
-            "urllib3 is using URLFetch on Google App Engine sandbox instead "
-            "of sockets. To use sockets directly instead of URLFetch see "
-            "https://urllib3.readthedocs.io/en/latest/reference/urllib3.contrib.html.",
-            AppEnginePlatformWarning)
-
-        RequestMethods.__init__(self, headers)
-        self.validate_certificate = validate_certificate
-        self.urlfetch_retries = urlfetch_retries
-
-        self.retries = retries or Retry.DEFAULT
-
-    def __enter__(self):
-        return self
-
-    def __exit__(self, exc_type, exc_val, exc_tb):
-        # Return False to re-raise any potential exceptions
-        return False
-
-    def urlopen(self, method, url, body=None, headers=None,
-                retries=None, redirect=True, timeout=Timeout.DEFAULT_TIMEOUT,
-                **response_kw):
-
-        retries = self._get_retries(retries, redirect)
-
-        try:
-            follow_redirects = (
-                    redirect and
-                    retries.redirect != 0 and
-                    retries.total)
-            response = urlfetch.fetch(
-                url,
-                payload=body,
-                method=method,
-                headers=headers or {},
-                allow_truncated=False,
-                follow_redirects=self.urlfetch_retries and follow_redirects,
-                deadline=self._get_absolute_timeout(timeout),
-                validate_certificate=self.validate_certificate,
-            )
-        except urlfetch.DeadlineExceededError as e:
-            raise TimeoutError(self, e)
-
-        except urlfetch.InvalidURLError as e:
-            if 'too large' in str(e):
-                raise AppEnginePlatformError(
-                    "URLFetch request too large, URLFetch only "
-                    "supports requests up to 10mb in size.", e)
-            raise ProtocolError(e)
-
-        except urlfetch.DownloadError as e:
-            if 'Too many redirects' in str(e):
-                raise MaxRetryError(self, url, reason=e)
-            raise ProtocolError(e)
-
-        except urlfetch.ResponseTooLargeError as e:
-            raise AppEnginePlatformError(
-                "URLFetch response too large, URLFetch only supports"
-                "responses up to 32mb in size.", e)
-
-        except urlfetch.SSLCertificateError as e:
-            raise SSLError(e)
-
-        except urlfetch.InvalidMethodError as e:
-            raise AppEnginePlatformError(
-                "URLFetch does not support method: %s" % method, e)
-
-        http_response = self._urlfetch_response_to_http_response(
-            response, retries=retries, **response_kw)
-
-        # Handle redirect?
-        redirect_location = redirect and http_response.get_redirect_location()
-        if redirect_location:
-            # Check for redirect response
-            if (self.urlfetch_retries and retries.raise_on_redirect):
-                raise MaxRetryError(self, url, "too many redirects")
-            else:
-                if http_response.status == 303:
-                    method = 'GET'
-
-                try:
-                    retries = retries.increment(method, url, response=http_response, _pool=self)
-                except MaxRetryError:
-                    if retries.raise_on_redirect:
-                        raise MaxRetryError(self, url, "too many redirects")
-                    return http_response
-
-                retries.sleep_for_retry(http_response)
-                log.debug("Redirecting %s -> %s", url, redirect_location)
-                redirect_url = urljoin(url, redirect_location)
-                return self.urlopen(
-                    method, redirect_url, body, headers,
-                    retries=retries, redirect=redirect,
-                    timeout=timeout, **response_kw)
-
-        # Check if we should retry the HTTP response.
-        has_retry_after = bool(http_response.getheader('Retry-After'))
-        if retries.is_retry(method, http_response.status, has_retry_after):
-            retries = retries.increment(
-                method, url, response=http_response, _pool=self)
-            log.debug("Retry: %s", url)
-            retries.sleep(http_response)
-            return self.urlopen(
-                method, url,
-                body=body, headers=headers,
-                retries=retries, redirect=redirect,
-                timeout=timeout, **response_kw)
-
-        return http_response
-
-    def _urlfetch_response_to_http_response(self, urlfetch_resp, **response_kw):
-
-        if is_prod_appengine():
-            # Production GAE handles deflate encoding automatically, but does
-            # not remove the encoding header.
-            content_encoding = urlfetch_resp.headers.get('content-encoding')
-
-            if content_encoding == 'deflate':
-                del urlfetch_resp.headers['content-encoding']
-
-        transfer_encoding = urlfetch_resp.headers.get('transfer-encoding')
-        # We have a full response's content,
-        # so let's make sure we don't report ourselves as chunked data.
-        if transfer_encoding == 'chunked':
-            encodings = transfer_encoding.split(",")
-            encodings.remove('chunked')
-            urlfetch_resp.headers['transfer-encoding'] = ','.join(encodings)
-
-        original_response = HTTPResponse(
-            # In order for decoding to work, we must present the content as
-            # a file-like object.
-            body=io.BytesIO(urlfetch_resp.content),
-            msg=urlfetch_resp.header_msg,
-            headers=urlfetch_resp.headers,
-            status=urlfetch_resp.status_code,
-            **response_kw
-        )
-
-        return HTTPResponse(
-            body=io.BytesIO(urlfetch_resp.content),
-            headers=urlfetch_resp.headers,
-            status=urlfetch_resp.status_code,
-            original_response=original_response,
-            **response_kw
-        )
-
-    def _get_absolute_timeout(self, timeout):
-        if timeout is Timeout.DEFAULT_TIMEOUT:
-            return None  # Defer to URLFetch's default.
-        if isinstance(timeout, Timeout):
-            if timeout._read is not None or timeout._connect is not None:
-                warnings.warn(
-                    "URLFetch does not support granular timeout settings, "
-                    "reverting to total or default URLFetch timeout.",
-                    AppEnginePlatformWarning)
-            return timeout.total
-        return timeout
-
-    def _get_retries(self, retries, redirect):
-        if not isinstance(retries, Retry):
-            retries = Retry.from_int(
-                retries, redirect=redirect, default=self.retries)
-
-        if retries.connect or retries.read or retries.redirect:
-            warnings.warn(
-                "URLFetch only supports total retries and does not "
-                "recognize connect, read, or redirect retry parameters.",
-                AppEnginePlatformWarning)
-
-        return retries
-
-
-# Alias methods from _appengine_environ to maintain public API interface.
-
-is_appengine = _appengine_environ.is_appengine
-is_appengine_sandbox = _appengine_environ.is_appengine_sandbox
-is_local_appengine = _appengine_environ.is_local_appengine
-is_prod_appengine = _appengine_environ.is_prod_appengine
-is_prod_appengine_mvms = _appengine_environ.is_prod_appengine_mvms
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/contrib/ntlmpool.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/contrib/ntlmpool.py
deleted file mode 100644
index 8ea127c..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/contrib/ntlmpool.py
+++ /dev/null
@@ -1,111 +0,0 @@
-"""
-NTLM authenticating pool, contributed by erikcederstran
-
-Issue #10, see: http://code.google.com/p/urllib3/issues/detail?id=10
-"""
-from __future__ import absolute_import
-
-from logging import getLogger
-from ntlm import ntlm
-
-from .. import HTTPSConnectionPool
-from ..packages.six.moves.http_client import HTTPSConnection
-
-
-log = getLogger(__name__)
-
-
-class NTLMConnectionPool(HTTPSConnectionPool):
-    """
-    Implements an NTLM authentication version of an urllib3 connection pool
-    """
-
-    scheme = 'https'
-
-    def __init__(self, user, pw, authurl, *args, **kwargs):
-        """
-        authurl is a random URL on the server that is protected by NTLM.
-        user is the Windows user, probably in the DOMAIN\\username format.
-        pw is the password for the user.
-        """
-        super(NTLMConnectionPool, self).__init__(*args, **kwargs)
-        self.authurl = authurl
-        self.rawuser = user
-        user_parts = user.split('\\', 1)
-        self.domain = user_parts[0].upper()
-        self.user = user_parts[1]
-        self.pw = pw
-
-    def _new_conn(self):
-        # Performs the NTLM handshake that secures the connection. The socket
-        # must be kept open while requests are performed.
-        self.num_connections += 1
-        log.debug('Starting NTLM HTTPS connection no. %d: https://%s%s',
-                  self.num_connections, self.host, self.authurl)
-
-        headers = {'Connection': 'Keep-Alive'}
-        req_header = 'Authorization'
-        resp_header = 'www-authenticate'
-
-        conn = HTTPSConnection(host=self.host, port=self.port)
-
-        # Send negotiation message
-        headers[req_header] = (
-            'NTLM %s' % ntlm.create_NTLM_NEGOTIATE_MESSAGE(self.rawuser))
-        log.debug('Request headers: %s', headers)
-        conn.request('GET', self.authurl, None, headers)
-        res = conn.getresponse()
-        reshdr = dict(res.getheaders())
-        log.debug('Response status: %s %s', res.status, res.reason)
-        log.debug('Response headers: %s', reshdr)
-        log.debug('Response data: %s [...]', res.read(100))
-
-        # Remove the reference to the socket, so that it can not be closed by
-        # the response object (we want to keep the socket open)
-        res.fp = None
-
-        # Server should respond with a challenge message
-        auth_header_values = reshdr[resp_header].split(', ')
-        auth_header_value = None
-        for s in auth_header_values:
-            if s[:5] == 'NTLM ':
-                auth_header_value = s[5:]
-        if auth_header_value is None:
-            raise Exception('Unexpected %s response header: %s' %
-                            (resp_header, reshdr[resp_header]))
-
-        # Send authentication message
-        ServerChallenge, NegotiateFlags = \
-            ntlm.parse_NTLM_CHALLENGE_MESSAGE(auth_header_value)
-        auth_msg = ntlm.create_NTLM_AUTHENTICATE_MESSAGE(ServerChallenge,
-                                                         self.user,
-                                                         self.domain,
-                                                         self.pw,
-                                                         NegotiateFlags)
-        headers[req_header] = 'NTLM %s' % auth_msg
-        log.debug('Request headers: %s', headers)
-        conn.request('GET', self.authurl, None, headers)
-        res = conn.getresponse()
-        log.debug('Response status: %s %s', res.status, res.reason)
-        log.debug('Response headers: %s', dict(res.getheaders()))
-        log.debug('Response data: %s [...]', res.read()[:100])
-        if res.status != 200:
-            if res.status == 401:
-                raise Exception('Server rejected request: wrong '
-                                'username or password')
-            raise Exception('Wrong server response: %s %s' %
-                            (res.status, res.reason))
-
-        res.fp = None
-        log.debug('Connection established')
-        return conn
-
-    def urlopen(self, method, url, body=None, headers=None, retries=3,
-                redirect=True, assert_same_host=True):
-        if headers is None:
-            headers = {}
-        headers['Connection'] = 'Keep-Alive'
-        return super(NTLMConnectionPool, self).urlopen(method, url, body,
-                                                       headers, retries,
-                                                       redirect,
-                                                       assert_same_host)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/contrib/pyopenssl.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/contrib/pyopenssl.py
deleted file mode 100644
index 363667c..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/contrib/pyopenssl.py
+++ /dev/null
@@ -1,466 +0,0 @@
-"""
-SSL with SNI_-support for Python 2. Follow these instructions if you would
-like to verify SSL certificates in Python 2. Note, the default libraries do
-*not* do certificate checking; you need to do additional work to validate
-certificates yourself.
-
-This needs the following packages installed:
-
-* pyOpenSSL (tested with 16.0.0)
-* cryptography (minimum 1.3.4, from pyopenssl)
-* idna (minimum 2.0, from cryptography)
-
-However, pyopenssl depends on cryptography, which depends on idna, so while we
-use all three directly here we end up having relatively few packages required.
-
-You can install them with the following command:
-
-    pip install pyopenssl cryptography idna
-
-To activate certificate checking, call
-:func:`~urllib3.contrib.pyopenssl.inject_into_urllib3` from your Python code
-before you begin making HTTP requests. This can be done in a ``sitecustomize``
-module, or at any other time before your application begins using ``urllib3``,
-like this::
-
-    try:
-        import urllib3.contrib.pyopenssl
-        urllib3.contrib.pyopenssl.inject_into_urllib3()
-    except ImportError:
-        pass
-
-Now you can use :mod:`urllib3` as you normally would, and it will support SNI
-when the required modules are installed.
-
-Activating this module also has the positive side effect of disabling SSL/TLS
-compression in Python 2 (see `CRIME attack`_).
-
-If you want to configure the default list of supported cipher suites, you can
-set the ``urllib3.contrib.pyopenssl.DEFAULT_SSL_CIPHER_LIST`` variable.
-
-.. _sni: https://en.wikipedia.org/wiki/Server_Name_Indication
-.. _crime attack: https://en.wikipedia.org/wiki/CRIME_(security_exploit)
-"""
-from __future__ import absolute_import
-
-import OpenSSL.SSL
-from cryptography import x509
-from cryptography.hazmat.backends.openssl import backend as openssl_backend
-from cryptography.hazmat.backends.openssl.x509 import _Certificate
-try:
-    from cryptography.x509 import UnsupportedExtension
-except ImportError:
-    # UnsupportedExtension is gone in cryptography >= 2.1.0
-    class UnsupportedExtension(Exception):
-        pass
-
-from socket import timeout, error as SocketError
-from io import BytesIO
-
-try:  # Platform-specific: Python 2
-    from socket import _fileobject
-except ImportError:  # Platform-specific: Python 3
-    _fileobject = None
-    from ..packages.backports.makefile import backport_makefile
-
-import logging
-import ssl
-from ..packages import six
-import sys
-
-from .. import util
-
-__all__ = ['inject_into_urllib3', 'extract_from_urllib3']
-
-# SNI always works.
-HAS_SNI = True
-
-# Map from urllib3 to PyOpenSSL compatible parameter-values.
-_openssl_versions = {
-    ssl.PROTOCOL_SSLv23: OpenSSL.SSL.SSLv23_METHOD,
-    ssl.PROTOCOL_TLSv1: OpenSSL.SSL.TLSv1_METHOD,
-}
-
-if hasattr(ssl, 'PROTOCOL_TLSv1_1') and hasattr(OpenSSL.SSL, 'TLSv1_1_METHOD'):
-    _openssl_versions[ssl.PROTOCOL_TLSv1_1] = OpenSSL.SSL.TLSv1_1_METHOD
-
-if hasattr(ssl, 'PROTOCOL_TLSv1_2') and hasattr(OpenSSL.SSL, 'TLSv1_2_METHOD'):
-    _openssl_versions[ssl.PROTOCOL_TLSv1_2] = OpenSSL.SSL.TLSv1_2_METHOD
-
-try:
-    _openssl_versions.update({ssl.PROTOCOL_SSLv3: OpenSSL.SSL.SSLv3_METHOD})
-except AttributeError:
-    pass
-
-_stdlib_to_openssl_verify = {
-    ssl.CERT_NONE: OpenSSL.SSL.VERIFY_NONE,
-    ssl.CERT_OPTIONAL: OpenSSL.SSL.VERIFY_PEER,
-    ssl.CERT_REQUIRED:
-        OpenSSL.SSL.VERIFY_PEER + OpenSSL.SSL.VERIFY_FAIL_IF_NO_PEER_CERT,
-}
-_openssl_to_stdlib_verify = dict(
-    (v, k) for k, v in _stdlib_to_openssl_verify.items()
-)
-
-# OpenSSL will only write 16K at a time
-SSL_WRITE_BLOCKSIZE = 16384
-
-orig_util_HAS_SNI = util.HAS_SNI
-orig_util_SSLContext = util.ssl_.SSLContext
-
-
-log = logging.getLogger(__name__)
-
-
-def inject_into_urllib3():
-    'Monkey-patch urllib3 with PyOpenSSL-backed SSL-support.'
-
-    _validate_dependencies_met()
-
-    util.ssl_.SSLContext = PyOpenSSLContext
-    util.HAS_SNI = HAS_SNI
-    util.ssl_.HAS_SNI = HAS_SNI
-    util.IS_PYOPENSSL = True
-    util.ssl_.IS_PYOPENSSL = True
-
-
-def extract_from_urllib3():
-    'Undo monkey-patching by :func:`inject_into_urllib3`.'
-
-    util.ssl_.SSLContext = orig_util_SSLContext
-    util.HAS_SNI = orig_util_HAS_SNI
-    util.ssl_.HAS_SNI = orig_util_HAS_SNI
-    util.IS_PYOPENSSL = False
-    util.ssl_.IS_PYOPENSSL = False
-
-
-def _validate_dependencies_met():
-    """
-    Verifies that PyOpenSSL's package-level dependencies have been met.
-    Throws `ImportError` if they are not met.
-    """
-    # Method added in `cryptography==1.1`; not available in older versions
-    from cryptography.x509.extensions import Extensions
-    if getattr(Extensions, "get_extension_for_class", None) is None:
-        raise ImportError("'cryptography' module missing required functionality.  "
-                          "Try upgrading to v1.3.4 or newer.")
-
-    # pyOpenSSL 0.14 and above use cryptography for OpenSSL bindings. The _x509
-    # attribute is only present on those versions.
-    from OpenSSL.crypto import X509
-    x509 = X509()
-    if getattr(x509, "_x509", None) is None:
-        raise ImportError("'pyOpenSSL' module missing required functionality. "
-                          "Try upgrading to v0.14 or newer.")
-
-
-def _dnsname_to_stdlib(name):
-    """
-    Converts a dNSName SubjectAlternativeName field to the form used by the
-    standard library on the given Python version.
-
-    Cryptography produces a dNSName as a unicode string that was idna-decoded
-    from ASCII bytes. We need to idna-encode that string to get it back, and
-    then on Python 3 we also need to convert to unicode via UTF-8 (the stdlib
-    uses PyUnicode_FromStringAndSize on it, which decodes via UTF-8).
-
-    If the name cannot be idna-encoded then we return None signalling that
-    the name given should be skipped.
-    """
-    def idna_encode(name):
-        """
-        Borrowed wholesale from the Python Cryptography Project. It turns out
-        that we can't just safely call `idna.encode`: it can explode for
-        wildcard names. This avoids that problem.
-        """
-        from pip._vendor import idna
-
-        try:
-            for prefix in [u'*.', u'.']:
-                if name.startswith(prefix):
-                    name = name[len(prefix):]
-                    return prefix.encode('ascii') + idna.encode(name)
-            return idna.encode(name)
-        except idna.core.IDNAError:
-            return None
-
-    name = idna_encode(name)
-    if name is None:
-        return None
-    elif sys.version_info >= (3, 0):
-        name = name.decode('utf-8')
-    return name
-
-
-def get_subj_alt_name(peer_cert):
-    """
-    Given an PyOpenSSL certificate, provides all the subject alternative names.
-    """
-    # Pass the cert to cryptography, which has much better APIs for this.
-    if hasattr(peer_cert, "to_cryptography"):
-        cert = peer_cert.to_cryptography()
-    else:
-        # This is technically using private APIs, but should work across all
-        # relevant versions before PyOpenSSL got a proper API for this.
-        cert = _Certificate(openssl_backend, peer_cert._x509)
-
-    # We want to find the SAN extension. Ask Cryptography to locate it (it's
-    # faster than looping in Python)
-    try:
-        ext = cert.extensions.get_extension_for_class(
-            x509.SubjectAlternativeName
-        ).value
-    except x509.ExtensionNotFound:
-        # No such extension, return the empty list.
-        return []
-    except (x509.DuplicateExtension, UnsupportedExtension,
-            x509.UnsupportedGeneralNameType, UnicodeError) as e:
-        # A problem has been found with the quality of the certificate. Assume
-        # no SAN field is present.
-        log.warning(
-            "A problem was encountered with the certificate that prevented "
-            "urllib3 from finding the SubjectAlternativeName field. This can "
-            "affect certificate validation. The error was %s",
-            e,
-        )
-        return []
-
-    # We want to return dNSName and iPAddress fields. We need to cast the IPs
-    # back to strings because the match_hostname function wants them as
-    # strings.
-    # Sadly the DNS names need to be idna encoded and then, on Python 3, UTF-8
-    # decoded. This is pretty frustrating, but that's what the standard library
-    # does with certificates, and so we need to attempt to do the same.
-    # We also want to skip over names which cannot be idna encoded.
-    names = [
-        ('DNS', name) for name in map(_dnsname_to_stdlib, ext.get_values_for_type(x509.DNSName))
-        if name is not None
-    ]
-    names.extend(
-        ('IP Address', str(name))
-        for name in ext.get_values_for_type(x509.IPAddress)
-    )
-
-    return names
-
-
-class WrappedSocket(object):
-    '''API-compatibility wrapper for Python OpenSSL's Connection-class.
-
-    Note: _makefile_refs, _drop() and _reuse() are needed for the garbage
-    collector of pypy.
-    '''
-
-    def __init__(self, connection, socket, suppress_ragged_eofs=True):
-        self.connection = connection
-        self.socket = socket
-        self.suppress_ragged_eofs = suppress_ragged_eofs
-        self._makefile_refs = 0
-        self._closed = False
-
-    def fileno(self):
-        return self.socket.fileno()
-
-    # Copy-pasted from Python 3.5 source code
-    def _decref_socketios(self):
-        if self._makefile_refs > 0:
-            self._makefile_refs -= 1
-        if self._closed:
-            self.close()
-
-    def recv(self, *args, **kwargs):
-        try:
-            data = self.connection.recv(*args, **kwargs)
-        except OpenSSL.SSL.SysCallError as e:
-            if self.suppress_ragged_eofs and e.args == (-1, 'Unexpected EOF'):
-                return b''
-            else:
-                raise SocketError(str(e))
-        except OpenSSL.SSL.ZeroReturnError as e:
-            if self.connection.get_shutdown() == OpenSSL.SSL.RECEIVED_SHUTDOWN:
-                return b''
-            else:
-                raise
-        except OpenSSL.SSL.WantReadError:
-            if not util.wait_for_read(self.socket, self.socket.gettimeout()):
-                raise timeout('The read operation timed out')
-            else:
-                return self.recv(*args, **kwargs)
-        else:
-            return data
-
-    def recv_into(self, *args, **kwargs):
-        try:
-            return self.connection.recv_into(*args, **kwargs)
-        except OpenSSL.SSL.SysCallError as e:
-            if self.suppress_ragged_eofs and e.args == (-1, 'Unexpected EOF'):
-                return 0
-            else:
-                raise SocketError(str(e))
-        except OpenSSL.SSL.ZeroReturnError as e:
-            if self.connection.get_shutdown() == OpenSSL.SSL.RECEIVED_SHUTDOWN:
-                return 0
-            else:
-                raise
-        except OpenSSL.SSL.WantReadError:
-            if not util.wait_for_read(self.socket, self.socket.gettimeout()):
-                raise timeout('The read operation timed out')
-            else:
-                return self.recv_into(*args, **kwargs)
-
-    def settimeout(self, timeout):
-        return self.socket.settimeout(timeout)
-
-    def _send_until_done(self, data):
-        while True:
-            try:
-                return self.connection.send(data)
-            except OpenSSL.SSL.WantWriteError:
-                if not util.wait_for_write(self.socket, self.socket.gettimeout()):
-                    raise timeout()
-                continue
-            except OpenSSL.SSL.SysCallError as e:
-                raise SocketError(str(e))
-
-    def sendall(self, data):
-        total_sent = 0
-        while total_sent < len(data):
-            sent = self._send_until_done(data[total_sent:total_sent + SSL_WRITE_BLOCKSIZE])
-            total_sent += sent
-
-    def shutdown(self):
-        # FIXME rethrow compatible exceptions should we ever use this
-        self.connection.shutdown()
-
-    def close(self):
-        if self._makefile_refs < 1:
-            try:
-                self._closed = True
-                return self.connection.close()
-            except OpenSSL.SSL.Error:
-                return
-        else:
-            self._makefile_refs -= 1
-
-    def getpeercert(self, binary_form=False):
-        x509 = self.connection.get_peer_certificate()
-
-        if not x509:
-            return x509
-
-        if binary_form:
-            return OpenSSL.crypto.dump_certificate(
-                OpenSSL.crypto.FILETYPE_ASN1,
-                x509)
-
-        return {
-            'subject': (
-                (('commonName', x509.get_subject().CN),),
-            ),
-            'subjectAltName': get_subj_alt_name(x509)
-        }
-
-    def _reuse(self):
-        self._makefile_refs += 1
-
-    def _drop(self):
-        if self._makefile_refs < 1:
-            self.close()
-        else:
-            self._makefile_refs -= 1
-
-
-if _fileobject:  # Platform-specific: Python 2
-    def makefile(self, mode, bufsize=-1):
-        self._makefile_refs += 1
-        return _fileobject(self, mode, bufsize, close=True)
-else:  # Platform-specific: Python 3
-    makefile = backport_makefile
-
-WrappedSocket.makefile = makefile
-
-
-class PyOpenSSLContext(object):
-    """
-    I am a wrapper class for the PyOpenSSL ``Context`` object. I am responsible
-    for translating the interface of the standard library ``SSLContext`` object
-    to calls into PyOpenSSL.
-    """
-    def __init__(self, protocol):
-        self.protocol = _openssl_versions[protocol]
-        self._ctx = OpenSSL.SSL.Context(self.protocol)
-        self._options = 0
-        self.check_hostname = False
-
-    @property
-    def options(self):
-        return self._options
-
-    @options.setter
-    def options(self, value):
-        self._options = value
-        self._ctx.set_options(value)
-
-    @property
-    def verify_mode(self):
-        return _openssl_to_stdlib_verify[self._ctx.get_verify_mode()]
-
-    @verify_mode.setter
-    def verify_mode(self, value):
-        self._ctx.set_verify(
-            _stdlib_to_openssl_verify[value],
-            _verify_callback
-        )
-
-    def set_default_verify_paths(self):
-        self._ctx.set_default_verify_paths()
-
-    def set_ciphers(self, ciphers):
-        if isinstance(ciphers, six.text_type):
-            ciphers = ciphers.encode('utf-8')
-        self._ctx.set_cipher_list(ciphers)
-
-    def load_verify_locations(self, cafile=None, capath=None, cadata=None):
-        if cafile is not None:
-            cafile = cafile.encode('utf-8')
-        if capath is not None:
-            capath = capath.encode('utf-8')
-        self._ctx.load_verify_locations(cafile, capath)
-        if cadata is not None:
-            self._ctx.load_verify_locations(BytesIO(cadata))
-
-    def load_cert_chain(self, certfile, keyfile=None, password=None):
-        self._ctx.use_certificate_chain_file(certfile)
-        if password is not None:
-            self._ctx.set_passwd_cb(lambda max_length, prompt_twice, userdata: password)
-        self._ctx.use_privatekey_file(keyfile or certfile)
-
-    def wrap_socket(self, sock, server_side=False,
-                    do_handshake_on_connect=True, suppress_ragged_eofs=True,
-                    server_hostname=None):
-        cnx = OpenSSL.SSL.Connection(self._ctx, sock)
-
-        if isinstance(server_hostname, six.text_type):  # Platform-specific: Python 3
-            server_hostname = server_hostname.encode('utf-8')
-
-        if server_hostname is not None:
-            cnx.set_tlsext_host_name(server_hostname)
-
-        cnx.set_connect_state()
-
-        while True:
-            try:
-                cnx.do_handshake()
-            except OpenSSL.SSL.WantReadError:
-                if not util.wait_for_read(sock, sock.gettimeout()):
-                    raise timeout('select timed out')
-                continue
-            except OpenSSL.SSL.Error as e:
-                raise ssl.SSLError('bad handshake: %r' % e)
-            break
-
-        return WrappedSocket(cnx, sock)
-
-
-def _verify_callback(cnx, x509, err_no, err_depth, return_code):
-    return err_no == 0
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/contrib/securetransport.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/contrib/securetransport.py
deleted file mode 100644
index 77cb59e..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/contrib/securetransport.py
+++ /dev/null
@@ -1,804 +0,0 @@
-"""
-SecureTranport support for urllib3 via ctypes.
-
-This makes platform-native TLS available to urllib3 users on macOS without the
-use of a compiler. This is an important feature because the Python Package
-Index is moving to become a TLSv1.2-or-higher server, and the default OpenSSL
-that ships with macOS is not capable of doing TLSv1.2. The only way to resolve
-this is to give macOS users an alternative solution to the problem, and that
-solution is to use SecureTransport.
-
-We use ctypes here because this solution must not require a compiler. That's
-because pip is not allowed to require a compiler either.
-
-This is not intended to be a seriously long-term solution to this problem.
-The hope is that PEP 543 will eventually solve this issue for us, at which
-point we can retire this contrib module. But in the short term, we need to
-solve the impending tire fire that is Python on Mac without this kind of
-contrib module. So...here we are.
-
-To use this module, simply import and inject it::
-
-    import urllib3.contrib.securetransport
-    urllib3.contrib.securetransport.inject_into_urllib3()
-
-Happy TLSing!
-"""
-from __future__ import absolute_import
-
-import contextlib
-import ctypes
-import errno
-import os.path
-import shutil
-import socket
-import ssl
-import threading
-import weakref
-
-from .. import util
-from ._securetransport.bindings import (
-    Security, SecurityConst, CoreFoundation
-)
-from ._securetransport.low_level import (
-    _assert_no_error, _cert_array_from_pem, _temporary_keychain,
-    _load_client_cert_chain
-)
-
-try:  # Platform-specific: Python 2
-    from socket import _fileobject
-except ImportError:  # Platform-specific: Python 3
-    _fileobject = None
-    from ..packages.backports.makefile import backport_makefile
-
-__all__ = ['inject_into_urllib3', 'extract_from_urllib3']
-
-# SNI always works
-HAS_SNI = True
-
-orig_util_HAS_SNI = util.HAS_SNI
-orig_util_SSLContext = util.ssl_.SSLContext
-
-# This dictionary is used by the read callback to obtain a handle to the
-# calling wrapped socket. This is a pretty silly approach, but for now it'll
-# do. I feel like I should be able to smuggle a handle to the wrapped socket
-# directly in the SSLConnectionRef, but for now this approach will work I
-# guess.
-#
-# We need to lock around this structure for inserts, but we don't do it for
-# reads/writes in the callbacks. The reasoning here goes as follows:
-#
-#    1. It is not possible to call into the callbacks before the dictionary is
-#       populated, so once in the callback the id must be in the dictionary.
-#    2. The callbacks don't mutate the dictionary, they only read from it, and
-#       so cannot conflict with any of the insertions.
-#
-# This is good: if we had to lock in the callbacks we'd drastically slow down
-# the performance of this code.
-_connection_refs = weakref.WeakValueDictionary()
-_connection_ref_lock = threading.Lock()
-
-# Limit writes to 16kB. This is OpenSSL's limit, but we'll cargo-cult it over
-# for no better reason than we need *a* limit, and this one is right there.
-SSL_WRITE_BLOCKSIZE = 16384
-
-# This is our equivalent of util.ssl_.DEFAULT_CIPHERS, but expanded out to
-# individual cipher suites. We need to do this because this is how
-# SecureTransport wants them.
-CIPHER_SUITES = [
-    SecurityConst.TLS_AES_256_GCM_SHA384,
-    SecurityConst.TLS_CHACHA20_POLY1305_SHA256,
-    SecurityConst.TLS_AES_128_GCM_SHA256,
-    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
-    SecurityConst.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
-    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
-    SecurityConst.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
-    SecurityConst.TLS_DHE_DSS_WITH_AES_256_GCM_SHA384,
-    SecurityConst.TLS_DHE_RSA_WITH_AES_256_GCM_SHA384,
-    SecurityConst.TLS_DHE_DSS_WITH_AES_128_GCM_SHA256,
-    SecurityConst.TLS_DHE_RSA_WITH_AES_128_GCM_SHA256,
-    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384,
-    SecurityConst.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384,
-    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
-    SecurityConst.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
-    SecurityConst.TLS_DHE_RSA_WITH_AES_256_CBC_SHA256,
-    SecurityConst.TLS_DHE_DSS_WITH_AES_256_CBC_SHA256,
-    SecurityConst.TLS_DHE_RSA_WITH_AES_256_CBC_SHA,
-    SecurityConst.TLS_DHE_DSS_WITH_AES_256_CBC_SHA,
-    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,
-    SecurityConst.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
-    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
-    SecurityConst.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
-    SecurityConst.TLS_DHE_RSA_WITH_AES_128_CBC_SHA256,
-    SecurityConst.TLS_DHE_DSS_WITH_AES_128_CBC_SHA256,
-    SecurityConst.TLS_DHE_RSA_WITH_AES_128_CBC_SHA,
-    SecurityConst.TLS_DHE_DSS_WITH_AES_128_CBC_SHA,
-    SecurityConst.TLS_RSA_WITH_AES_256_GCM_SHA384,
-    SecurityConst.TLS_RSA_WITH_AES_128_GCM_SHA256,
-    SecurityConst.TLS_RSA_WITH_AES_256_CBC_SHA256,
-    SecurityConst.TLS_RSA_WITH_AES_128_CBC_SHA256,
-    SecurityConst.TLS_RSA_WITH_AES_256_CBC_SHA,
-    SecurityConst.TLS_RSA_WITH_AES_128_CBC_SHA,
-]
-
-# Basically this is simple: for PROTOCOL_SSLv23 we turn it into a low of
-# TLSv1 and a high of TLSv1.2. For everything else, we pin to that version.
-_protocol_to_min_max = {
-    ssl.PROTOCOL_SSLv23: (SecurityConst.kTLSProtocol1, SecurityConst.kTLSProtocol12),
-}
-
-if hasattr(ssl, "PROTOCOL_SSLv2"):
-    _protocol_to_min_max[ssl.PROTOCOL_SSLv2] = (
-        SecurityConst.kSSLProtocol2, SecurityConst.kSSLProtocol2
-    )
-if hasattr(ssl, "PROTOCOL_SSLv3"):
-    _protocol_to_min_max[ssl.PROTOCOL_SSLv3] = (
-        SecurityConst.kSSLProtocol3, SecurityConst.kSSLProtocol3
-    )
-if hasattr(ssl, "PROTOCOL_TLSv1"):
-    _protocol_to_min_max[ssl.PROTOCOL_TLSv1] = (
-        SecurityConst.kTLSProtocol1, SecurityConst.kTLSProtocol1
-    )
-if hasattr(ssl, "PROTOCOL_TLSv1_1"):
-    _protocol_to_min_max[ssl.PROTOCOL_TLSv1_1] = (
-        SecurityConst.kTLSProtocol11, SecurityConst.kTLSProtocol11
-    )
-if hasattr(ssl, "PROTOCOL_TLSv1_2"):
-    _protocol_to_min_max[ssl.PROTOCOL_TLSv1_2] = (
-        SecurityConst.kTLSProtocol12, SecurityConst.kTLSProtocol12
-    )
-if hasattr(ssl, "PROTOCOL_TLS"):
-    _protocol_to_min_max[ssl.PROTOCOL_TLS] = _protocol_to_min_max[ssl.PROTOCOL_SSLv23]
-
-
-def inject_into_urllib3():
-    """
-    Monkey-patch urllib3 with SecureTransport-backed SSL-support.
-    """
-    util.ssl_.SSLContext = SecureTransportContext
-    util.HAS_SNI = HAS_SNI
-    util.ssl_.HAS_SNI = HAS_SNI
-    util.IS_SECURETRANSPORT = True
-    util.ssl_.IS_SECURETRANSPORT = True
-
-
-def extract_from_urllib3():
-    """
-    Undo monkey-patching by :func:`inject_into_urllib3`.
-    """
-    util.ssl_.SSLContext = orig_util_SSLContext
-    util.HAS_SNI = orig_util_HAS_SNI
-    util.ssl_.HAS_SNI = orig_util_HAS_SNI
-    util.IS_SECURETRANSPORT = False
-    util.ssl_.IS_SECURETRANSPORT = False
-
-
-def _read_callback(connection_id, data_buffer, data_length_pointer):
-    """
-    SecureTransport read callback. This is called by ST to request that data
-    be returned from the socket.
-    """
-    wrapped_socket = None
-    try:
-        wrapped_socket = _connection_refs.get(connection_id)
-        if wrapped_socket is None:
-            return SecurityConst.errSSLInternal
-        base_socket = wrapped_socket.socket
-
-        requested_length = data_length_pointer[0]
-
-        timeout = wrapped_socket.gettimeout()
-        error = None
-        read_count = 0
-
-        try:
-            while read_count < requested_length:
-                if timeout is None or timeout >= 0:
-                    if not util.wait_for_read(base_socket, timeout):
-                        raise socket.error(errno.EAGAIN, 'timed out')
-
-                remaining = requested_length - read_count
-                buffer = (ctypes.c_char * remaining).from_address(
-                    data_buffer + read_count
-                )
-                chunk_size = base_socket.recv_into(buffer, remaining)
-                read_count += chunk_size
-                if not chunk_size:
-                    if not read_count:
-                        return SecurityConst.errSSLClosedGraceful
-                    break
-        except (socket.error) as e:
-            error = e.errno
-
-            if error is not None and error != errno.EAGAIN:
-                data_length_pointer[0] = read_count
-                if error == errno.ECONNRESET or error == errno.EPIPE:
-                    return SecurityConst.errSSLClosedAbort
-                raise
-
-        data_length_pointer[0] = read_count
-
-        if read_count != requested_length:
-            return SecurityConst.errSSLWouldBlock
-
-        return 0
-    except Exception as e:
-        if wrapped_socket is not None:
-            wrapped_socket._exception = e
-        return SecurityConst.errSSLInternal
-
-
-def _write_callback(connection_id, data_buffer, data_length_pointer):
-    """
-    SecureTransport write callback. This is called by ST to request that data
-    actually be sent on the network.
-    """
-    wrapped_socket = None
-    try:
-        wrapped_socket = _connection_refs.get(connection_id)
-        if wrapped_socket is None:
-            return SecurityConst.errSSLInternal
-        base_socket = wrapped_socket.socket
-
-        bytes_to_write = data_length_pointer[0]
-        data = ctypes.string_at(data_buffer, bytes_to_write)
-
-        timeout = wrapped_socket.gettimeout()
-        error = None
-        sent = 0
-
-        try:
-            while sent < bytes_to_write:
-                if timeout is None or timeout >= 0:
-                    if not util.wait_for_write(base_socket, timeout):
-                        raise socket.error(errno.EAGAIN, 'timed out')
-                chunk_sent = base_socket.send(data)
-                sent += chunk_sent
-
-                # This has some needless copying here, but I'm not sure there's
-                # much value in optimising this data path.
-                data = data[chunk_sent:]
-        except (socket.error) as e:
-            error = e.errno
-
-            if error is not None and error != errno.EAGAIN:
-                data_length_pointer[0] = sent
-                if error == errno.ECONNRESET or error == errno.EPIPE:
-                    return SecurityConst.errSSLClosedAbort
-                raise
-
-        data_length_pointer[0] = sent
-
-        if sent != bytes_to_write:
-            return SecurityConst.errSSLWouldBlock
-
-        return 0
-    except Exception as e:
-        if wrapped_socket is not None:
-            wrapped_socket._exception = e
-        return SecurityConst.errSSLInternal
-
-
-# We need to keep these two objects references alive: if they get GC'd while
-# in use then SecureTransport could attempt to call a function that is in freed
-# memory. That would be...uh...bad. Yeah, that's the word. Bad.
-_read_callback_pointer = Security.SSLReadFunc(_read_callback)
-_write_callback_pointer = Security.SSLWriteFunc(_write_callback)
-
-
-class WrappedSocket(object):
-    """
-    API-compatibility wrapper for Python's OpenSSL wrapped socket object.
-
-    Note: _makefile_refs, _drop(), and _reuse() are needed for the garbage
-    collector of PyPy.
-    """
-    def __init__(self, socket):
-        self.socket = socket
-        self.context = None
-        self._makefile_refs = 0
-        self._closed = False
-        self._exception = None
-        self._keychain = None
-        self._keychain_dir = None
-        self._client_cert_chain = None
-
-        # We save off the previously-configured timeout and then set it to
-        # zero. This is done because we use select and friends to handle the
-        # timeouts, but if we leave the timeout set on the lower socket then
-        # Python will "kindly" call select on that socket again for us. Avoid
-        # that by forcing the timeout to zero.
-        self._timeout = self.socket.gettimeout()
-        self.socket.settimeout(0)
-
-    @contextlib.contextmanager
-    def _raise_on_error(self):
-        """
-        A context manager that can be used to wrap calls that do I/O from
-        SecureTransport. If any of the I/O callbacks hit an exception, this
-        context manager will correctly propagate the exception after the fact.
-        This avoids silently swallowing those exceptions.
-
-        It also correctly forces the socket closed.
-        """
-        self._exception = None
-
-        # We explicitly don't catch around this yield because in the unlikely
-        # event that an exception was hit in the block we don't want to swallow
-        # it.
-        yield
-        if self._exception is not None:
-            exception, self._exception = self._exception, None
-            self.close()
-            raise exception
-
-    def _set_ciphers(self):
-        """
-        Sets up the allowed ciphers. By default this matches the set in
-        util.ssl_.DEFAULT_CIPHERS, at least as supported by macOS. This is done
-        custom and doesn't allow changing at this time, mostly because parsing
-        OpenSSL cipher strings is going to be a freaking nightmare.
-        """
-        ciphers = (Security.SSLCipherSuite * len(CIPHER_SUITES))(*CIPHER_SUITES)
-        result = Security.SSLSetEnabledCiphers(
-            self.context, ciphers, len(CIPHER_SUITES)
-        )
-        _assert_no_error(result)
-
-    def _custom_validate(self, verify, trust_bundle):
-        """
-        Called when we have set custom validation. We do this in two cases:
-        first, when cert validation is entirely disabled; and second, when
-        using a custom trust DB.
-        """
-        # If we disabled cert validation, just say: cool.
-        if not verify:
-            return
-
-        # We want data in memory, so load it up.
-        if os.path.isfile(trust_bundle):
-            with open(trust_bundle, 'rb') as f:
-                trust_bundle = f.read()
-
-        cert_array = None
-        trust = Security.SecTrustRef()
-
-        try:
-            # Get a CFArray that contains the certs we want.
-            cert_array = _cert_array_from_pem(trust_bundle)
-
-            # Ok, now the hard part. We want to get the SecTrustRef that ST has
-            # created for this connection, shove our CAs into it, tell ST to
-            # ignore everything else it knows, and then ask if it can build a
-            # chain. This is a buuuunch of code.
-            result = Security.SSLCopyPeerTrust(
-                self.context, ctypes.byref(trust)
-            )
-            _assert_no_error(result)
-            if not trust:
-                raise ssl.SSLError("Failed to copy trust reference")
-
-            result = Security.SecTrustSetAnchorCertificates(trust, cert_array)
-            _assert_no_error(result)
-
-            result = Security.SecTrustSetAnchorCertificatesOnly(trust, True)
-            _assert_no_error(result)
-
-            trust_result = Security.SecTrustResultType()
-            result = Security.SecTrustEvaluate(
-                trust, ctypes.byref(trust_result)
-            )
-            _assert_no_error(result)
-        finally:
-            if trust:
-                CoreFoundation.CFRelease(trust)
-
-            if cert_array is not None:
-                CoreFoundation.CFRelease(cert_array)
-
-        # Ok, now we can look at what the result was.
-        successes = (
-            SecurityConst.kSecTrustResultUnspecified,
-            SecurityConst.kSecTrustResultProceed
-        )
-        if trust_result.value not in successes:
-            raise ssl.SSLError(
-                "certificate verify failed, error code: %d" %
-                trust_result.value
-            )
-
-    def handshake(self,
-                  server_hostname,
-                  verify,
-                  trust_bundle,
-                  min_version,
-                  max_version,
-                  client_cert,
-                  client_key,
-                  client_key_passphrase):
-        """
-        Actually performs the TLS handshake. This is run automatically by
-        wrapped socket, and shouldn't be needed in user code.
-        """
-        # First, we do the initial bits of connection setup. We need to create
-        # a context, set its I/O funcs, and set the connection reference.
-        self.context = Security.SSLCreateContext(
-            None, SecurityConst.kSSLClientSide, SecurityConst.kSSLStreamType
-        )
-        result = Security.SSLSetIOFuncs(
-            self.context, _read_callback_pointer, _write_callback_pointer
-        )
-        _assert_no_error(result)
-
-        # Here we need to compute the handle to use. We do this by taking the
-        # id of self modulo 2**31 - 1. If this is already in the dictionary, we
-        # just keep incrementing by one until we find a free space.
-        with _connection_ref_lock:
-            handle = id(self) % 2147483647
-            while handle in _connection_refs:
-                handle = (handle + 1) % 2147483647
-            _connection_refs[handle] = self
-
-        result = Security.SSLSetConnection(self.context, handle)
-        _assert_no_error(result)
-
-        # If we have a server hostname, we should set that too.
-        if server_hostname:
-            if not isinstance(server_hostname, bytes):
-                server_hostname = server_hostname.encode('utf-8')
-
-            result = Security.SSLSetPeerDomainName(
-                self.context, server_hostname, len(server_hostname)
-            )
-            _assert_no_error(result)
-
-        # Setup the ciphers.
-        self._set_ciphers()
-
-        # Set the minimum and maximum TLS versions.
-        result = Security.SSLSetProtocolVersionMin(self.context, min_version)
-        _assert_no_error(result)
-        result = Security.SSLSetProtocolVersionMax(self.context, max_version)
-        _assert_no_error(result)
-
-        # If there's a trust DB, we need to use it. We do that by telling
-        # SecureTransport to break on server auth. We also do that if we don't
-        # want to validate the certs at all: we just won't actually do any
-        # authing in that case.
-        if not verify or trust_bundle is not None:
-            result = Security.SSLSetSessionOption(
-                self.context,
-                SecurityConst.kSSLSessionOptionBreakOnServerAuth,
-                True
-            )
-            _assert_no_error(result)
-
-        # If there's a client cert, we need to use it.
-        if client_cert:
-            self._keychain, self._keychain_dir = _temporary_keychain()
-            self._client_cert_chain = _load_client_cert_chain(
-                self._keychain, client_cert, client_key
-            )
-            result = Security.SSLSetCertificate(
-                self.context, self._client_cert_chain
-            )
-            _assert_no_error(result)
-
-        while True:
-            with self._raise_on_error():
-                result = Security.SSLHandshake(self.context)
-
-                if result == SecurityConst.errSSLWouldBlock:
-                    raise socket.timeout("handshake timed out")
-                elif result == SecurityConst.errSSLServerAuthCompleted:
-                    self._custom_validate(verify, trust_bundle)
-                    continue
-                else:
-                    _assert_no_error(result)
-                    break
-
-    def fileno(self):
-        return self.socket.fileno()
-
-    # Copy-pasted from Python 3.5 source code
-    def _decref_socketios(self):
-        if self._makefile_refs > 0:
-            self._makefile_refs -= 1
-        if self._closed:
-            self.close()
-
-    def recv(self, bufsiz):
-        buffer = ctypes.create_string_buffer(bufsiz)
-        bytes_read = self.recv_into(buffer, bufsiz)
-        data = buffer[:bytes_read]
-        return data
-
-    def recv_into(self, buffer, nbytes=None):
-        # Read short on EOF.
-        if self._closed:
-            return 0
-
-        if nbytes is None:
-            nbytes = len(buffer)
-
-        buffer = (ctypes.c_char * nbytes).from_buffer(buffer)
-        processed_bytes = ctypes.c_size_t(0)
-
-        with self._raise_on_error():
-            result = Security.SSLRead(
-                self.context, buffer, nbytes, ctypes.byref(processed_bytes)
-            )
-
-        # There are some result codes that we want to treat as "not always
-        # errors". Specifically, those are errSSLWouldBlock,
-        # errSSLClosedGraceful, and errSSLClosedNoNotify.
-        if (result == SecurityConst.errSSLWouldBlock):
-            # If we didn't process any bytes, then this was just a time out.
-            # However, we can get errSSLWouldBlock in situations when we *did*
-            # read some data, and in those cases we should just read "short"
-            # and return.
-            if processed_bytes.value == 0:
-                # Timed out, no data read.
-                raise socket.timeout("recv timed out")
-        elif result in (SecurityConst.errSSLClosedGraceful, SecurityConst.errSSLClosedNoNotify):
-            # The remote peer has closed this connection. We should do so as
-            # well. Note that we don't actually return here because in
-            # principle this could actually be fired along with return data.
-            # It's unlikely though.
-            self.close()
-        else:
-            _assert_no_error(result)
-
-        # Ok, we read and probably succeeded. We should return whatever data
-        # was actually read.
-        return processed_bytes.value
-
-    def settimeout(self, timeout):
-        self._timeout = timeout
-
-    def gettimeout(self):
-        return self._timeout
-
-    def send(self, data):
-        processed_bytes = ctypes.c_size_t(0)
-
-        with self._raise_on_error():
-            result = Security.SSLWrite(
-                self.context, data, len(data), ctypes.byref(processed_bytes)
-            )
-
-        if result == SecurityConst.errSSLWouldBlock and processed_bytes.value == 0:
-            # Timed out
-            raise socket.timeout("send timed out")
-        else:
-            _assert_no_error(result)
-
-        # We sent, and probably succeeded. Tell them how much we sent.
-        return processed_bytes.value
-
-    def sendall(self, data):
-        total_sent = 0
-        while total_sent < len(data):
-            sent = self.send(data[total_sent:total_sent + SSL_WRITE_BLOCKSIZE])
-            total_sent += sent
-
-    def shutdown(self):
-        with self._raise_on_error():
-            Security.SSLClose(self.context)
-
-    def close(self):
-        # TODO: should I do clean shutdown here? Do I have to?
-        if self._makefile_refs < 1:
-            self._closed = True
-            if self.context:
-                CoreFoundation.CFRelease(self.context)
-                self.context = None
-            if self._client_cert_chain:
-                CoreFoundation.CFRelease(self._client_cert_chain)
-                self._client_cert_chain = None
-            if self._keychain:
-                Security.SecKeychainDelete(self._keychain)
-                CoreFoundation.CFRelease(self._keychain)
-                shutil.rmtree(self._keychain_dir)
-                self._keychain = self._keychain_dir = None
-            return self.socket.close()
-        else:
-            self._makefile_refs -= 1
-
-    def getpeercert(self, binary_form=False):
-        # Urgh, annoying.
-        #
-        # Here's how we do this:
-        #
-        # 1. Call SSLCopyPeerTrust to get hold of the trust object for this
-        #    connection.
-        # 2. Call SecTrustGetCertificateAtIndex for index 0 to get the leaf.
-        # 3. To get the CN, call SecCertificateCopyCommonName and process that
-        #    string so that it's of the appropriate type.
-        # 4. To get the SAN, we need to do something a bit more complex:
-        #    a. Call SecCertificateCopyValues to get the data, requesting
-        #       kSecOIDSubjectAltName.
-        #    b. Mess about with this dictionary to try to get the SANs out.
-        #
-        # This is gross. Really gross. It's going to be a few hundred LoC extra
-        # just to repeat something that SecureTransport can *already do*. So my
-        # operating assumption at this time is that what we want to do is
-        # instead to just flag to urllib3 that it shouldn't do its own hostname
-        # validation when using SecureTransport.
-        if not binary_form:
-            raise ValueError(
-                "SecureTransport only supports dumping binary certs"
-            )
-        trust = Security.SecTrustRef()
-        certdata = None
-        der_bytes = None
-
-        try:
-            # Grab the trust store.
-            result = Security.SSLCopyPeerTrust(
-                self.context, ctypes.byref(trust)
-            )
-            _assert_no_error(result)
-            if not trust:
-                # Probably we haven't done the handshake yet. No biggie.
-                return None
-
-            cert_count = Security.SecTrustGetCertificateCount(trust)
-            if not cert_count:
-                # Also a case that might happen if we haven't handshaked.
-                # Handshook? Handshaken?
-                return None
-
-            leaf = Security.SecTrustGetCertificateAtIndex(trust, 0)
-            assert leaf
-
-            # Ok, now we want the DER bytes.
-            certdata = Security.SecCertificateCopyData(leaf)
-            assert certdata
-
-            data_length = CoreFoundation.CFDataGetLength(certdata)
-            data_buffer = CoreFoundation.CFDataGetBytePtr(certdata)
-            der_bytes = ctypes.string_at(data_buffer, data_length)
-        finally:
-            if certdata:
-                CoreFoundation.CFRelease(certdata)
-            if trust:
-                CoreFoundation.CFRelease(trust)
-
-        return der_bytes
-
-    def _reuse(self):
-        self._makefile_refs += 1
-
-    def _drop(self):
-        if self._makefile_refs < 1:
-            self.close()
-        else:
-            self._makefile_refs -= 1
-
-
-if _fileobject:  # Platform-specific: Python 2
-    def makefile(self, mode, bufsize=-1):
-        self._makefile_refs += 1
-        return _fileobject(self, mode, bufsize, close=True)
-else:  # Platform-specific: Python 3
-    def makefile(self, mode="r", buffering=None, *args, **kwargs):
-        # We disable buffering with SecureTransport because it conflicts with
-        # the buffering that ST does internally (see issue #1153 for more).
-        buffering = 0
-        return backport_makefile(self, mode, buffering, *args, **kwargs)
-
-WrappedSocket.makefile = makefile
-
-
-class SecureTransportContext(object):
-    """
-    I am a wrapper class for the SecureTransport library, to translate the
-    interface of the standard library ``SSLContext`` object to calls into
-    SecureTransport.
-    """
-    def __init__(self, protocol):
-        self._min_version, self._max_version = _protocol_to_min_max[protocol]
-        self._options = 0
-        self._verify = False
-        self._trust_bundle = None
-        self._client_cert = None
-        self._client_key = None
-        self._client_key_passphrase = None
-
-    @property
-    def check_hostname(self):
-        """
-        SecureTransport cannot have its hostname checking disabled. For more,
-        see the comment on getpeercert() in this file.
-        """
-        return True
-
-    @check_hostname.setter
-    def check_hostname(self, value):
-        """
-        SecureTransport cannot have its hostname checking disabled. For more,
-        see the comment on getpeercert() in this file.
-        """
-        pass
-
-    @property
-    def options(self):
-        # TODO: Well, crap.
-        #
-        # So this is the bit of the code that is the most likely to cause us
-        # trouble. Essentially we need to enumerate all of the SSL options that
-        # users might want to use and try to see if we can sensibly translate
-        # them, or whether we should just ignore them.
-        return self._options
-
-    @options.setter
-    def options(self, value):
-        # TODO: Update in line with above.
-        self._options = value
-
-    @property
-    def verify_mode(self):
-        return ssl.CERT_REQUIRED if self._verify else ssl.CERT_NONE
-
-    @verify_mode.setter
-    def verify_mode(self, value):
-        self._verify = True if value == ssl.CERT_REQUIRED else False
-
-    def set_default_verify_paths(self):
-        # So, this has to do something a bit weird. Specifically, what it does
-        # is nothing.
-        #
-        # This means that, if we had previously had load_verify_locations
-        # called, this does not undo that. We need to do that because it turns
-        # out that the rest of the urllib3 code will attempt to load the
-        # default verify paths if it hasn't been told about any paths, even if
-        # the context itself was sometime earlier. We resolve that by just
-        # ignoring it.
-        pass
-
-    def load_default_certs(self):
-        return self.set_default_verify_paths()
-
-    def set_ciphers(self, ciphers):
-        # For now, we just require the default cipher string.
-        if ciphers != util.ssl_.DEFAULT_CIPHERS:
-            raise ValueError(
-                "SecureTransport doesn't support custom cipher strings"
-            )
-
-    def load_verify_locations(self, cafile=None, capath=None, cadata=None):
-        # OK, we only really support cadata and cafile.
-        if capath is not None:
-            raise ValueError(
-                "SecureTransport does not support cert directories"
-            )
-
-        self._trust_bundle = cafile or cadata
-
-    def load_cert_chain(self, certfile, keyfile=None, password=None):
-        self._client_cert = certfile
-        self._client_key = keyfile
-        self._client_cert_passphrase = password
-
-    def wrap_socket(self, sock, server_side=False,
-                    do_handshake_on_connect=True, suppress_ragged_eofs=True,
-                    server_hostname=None):
-        # So, what do we do here? Firstly, we assert some properties. This is a
-        # stripped down shim, so there is some functionality we don't support.
-        # See PEP 543 for the real deal.
-        assert not server_side
-        assert do_handshake_on_connect
-        assert suppress_ragged_eofs
-
-        # Ok, we're good to go. Now we want to create the wrapped socket object
-        # and store it in the appropriate place.
-        wrapped_socket = WrappedSocket(sock)
-
-        # Now we can handshake
-        wrapped_socket.handshake(
-            server_hostname, self._verify, self._trust_bundle,
-            self._min_version, self._max_version, self._client_cert,
-            self._client_key, self._client_key_passphrase
-        )
-        return wrapped_socket
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/contrib/socks.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/contrib/socks.py
deleted file mode 100644
index 811e312..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/contrib/socks.py
+++ /dev/null
@@ -1,192 +0,0 @@
-# -*- coding: utf-8 -*-
-"""
-This module contains provisional support for SOCKS proxies from within
-urllib3. This module supports SOCKS4 (specifically the SOCKS4A variant) and
-SOCKS5. To enable its functionality, either install PySocks or install this
-module with the ``socks`` extra.
-
-The SOCKS implementation supports the full range of urllib3 features. It also
-supports the following SOCKS features:
-
-- SOCKS4
-- SOCKS4a
-- SOCKS5
-- Usernames and passwords for the SOCKS proxy
-
-Known Limitations:
-
-- Currently PySocks does not support contacting remote websites via literal
-  IPv6 addresses. Any such connection attempt will fail. You must use a domain
-  name.
-- Currently PySocks does not support IPv6 connections to the SOCKS proxy. Any
-  such connection attempt will fail.
-"""
-from __future__ import absolute_import
-
-try:
-    import socks
-except ImportError:
-    import warnings
-    from ..exceptions import DependencyWarning
-
-    warnings.warn((
-        'SOCKS support in urllib3 requires the installation of optional '
-        'dependencies: specifically, PySocks.  For more information, see '
-        'https://urllib3.readthedocs.io/en/latest/contrib.html#socks-proxies'
-        ),
-        DependencyWarning
-    )
-    raise
-
-from socket import error as SocketError, timeout as SocketTimeout
-
-from ..connection import (
-    HTTPConnection, HTTPSConnection
-)
-from ..connectionpool import (
-    HTTPConnectionPool, HTTPSConnectionPool
-)
-from ..exceptions import ConnectTimeoutError, NewConnectionError
-from ..poolmanager import PoolManager
-from ..util.url import parse_url
-
-try:
-    import ssl
-except ImportError:
-    ssl = None
-
-
-class SOCKSConnection(HTTPConnection):
-    """
-    A plain-text HTTP connection that connects via a SOCKS proxy.
-    """
-    def __init__(self, *args, **kwargs):
-        self._socks_options = kwargs.pop('_socks_options')
-        super(SOCKSConnection, self).__init__(*args, **kwargs)
-
-    def _new_conn(self):
-        """
-        Establish a new connection via the SOCKS proxy.
-        """
-        extra_kw = {}
-        if self.source_address:
-            extra_kw['source_address'] = self.source_address
-
-        if self.socket_options:
-            extra_kw['socket_options'] = self.socket_options
-
-        try:
-            conn = socks.create_connection(
-                (self.host, self.port),
-                proxy_type=self._socks_options['socks_version'],
-                proxy_addr=self._socks_options['proxy_host'],
-                proxy_port=self._socks_options['proxy_port'],
-                proxy_username=self._socks_options['username'],
-                proxy_password=self._socks_options['password'],
-                proxy_rdns=self._socks_options['rdns'],
-                timeout=self.timeout,
-                **extra_kw
-            )
-
-        except SocketTimeout as e:
-            raise ConnectTimeoutError(
-                self, "Connection to %s timed out. (connect timeout=%s)" %
-                (self.host, self.timeout))
-
-        except socks.ProxyError as e:
-            # This is fragile as hell, but it seems to be the only way to raise
-            # useful errors here.
-            if e.socket_err:
-                error = e.socket_err
-                if isinstance(error, SocketTimeout):
-                    raise ConnectTimeoutError(
-                        self,
-                        "Connection to %s timed out. (connect timeout=%s)" %
-                        (self.host, self.timeout)
-                    )
-                else:
-                    raise NewConnectionError(
-                        self,
-                        "Failed to establish a new connection: %s" % error
-                    )
-            else:
-                raise NewConnectionError(
-                    self,
-                    "Failed to establish a new connection: %s" % e
-                )
-
-        except SocketError as e:  # Defensive: PySocks should catch all these.
-            raise NewConnectionError(
-                self, "Failed to establish a new connection: %s" % e)
-
-        return conn
-
-
-# We don't need to duplicate the Verified/Unverified distinction from
-# urllib3/connection.py here because the HTTPSConnection will already have been
-# correctly set to either the Verified or Unverified form by that module. This
-# means the SOCKSHTTPSConnection will automatically be the correct type.
-class SOCKSHTTPSConnection(SOCKSConnection, HTTPSConnection):
-    pass
-
-
-class SOCKSHTTPConnectionPool(HTTPConnectionPool):
-    ConnectionCls = SOCKSConnection
-
-
-class SOCKSHTTPSConnectionPool(HTTPSConnectionPool):
-    ConnectionCls = SOCKSHTTPSConnection
-
-
-class SOCKSProxyManager(PoolManager):
-    """
-    A version of the urllib3 ProxyManager that routes connections via the
-    defined SOCKS proxy.
-    """
-    pool_classes_by_scheme = {
-        'http': SOCKSHTTPConnectionPool,
-        'https': SOCKSHTTPSConnectionPool,
-    }
-
-    def __init__(self, proxy_url, username=None, password=None,
-                 num_pools=10, headers=None, **connection_pool_kw):
-        parsed = parse_url(proxy_url)
-
-        if username is None and password is None and parsed.auth is not None:
-            split = parsed.auth.split(':')
-            if len(split) == 2:
-                username, password = split
-        if parsed.scheme == 'socks5':
-            socks_version = socks.PROXY_TYPE_SOCKS5
-            rdns = False
-        elif parsed.scheme == 'socks5h':
-            socks_version = socks.PROXY_TYPE_SOCKS5
-            rdns = True
-        elif parsed.scheme == 'socks4':
-            socks_version = socks.PROXY_TYPE_SOCKS4
-            rdns = False
-        elif parsed.scheme == 'socks4a':
-            socks_version = socks.PROXY_TYPE_SOCKS4
-            rdns = True
-        else:
-            raise ValueError(
-                "Unable to determine SOCKS version from %s" % proxy_url
-            )
-
-        self.proxy_url = proxy_url
-
-        socks_options = {
-            'socks_version': socks_version,
-            'proxy_host': parsed.host,
-            'proxy_port': parsed.port,
-            'username': username,
-            'password': password,
-            'rdns': rdns
-        }
-        connection_pool_kw['_socks_options'] = socks_options
-
-        super(SOCKSProxyManager, self).__init__(
-            num_pools, headers, **connection_pool_kw
-        )
-
-        self.pool_classes_by_scheme = SOCKSProxyManager.pool_classes_by_scheme
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/exceptions.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/exceptions.py
deleted file mode 100644
index 7bbaa98..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/exceptions.py
+++ /dev/null
@@ -1,246 +0,0 @@
-from __future__ import absolute_import
-from .packages.six.moves.http_client import (
-    IncompleteRead as httplib_IncompleteRead
-)
-# Base Exceptions
-
-
-class HTTPError(Exception):
-    "Base exception used by this module."
-    pass
-
-
-class HTTPWarning(Warning):
-    "Base warning used by this module."
-    pass
-
-
-class PoolError(HTTPError):
-    "Base exception for errors caused within a pool."
-    def __init__(self, pool, message):
-        self.pool = pool
-        HTTPError.__init__(self, "%s: %s" % (pool, message))
-
-    def __reduce__(self):
-        # For pickling purposes.
-        return self.__class__, (None, None)
-
-
-class RequestError(PoolError):
-    "Base exception for PoolErrors that have associated URLs."
-    def __init__(self, pool, url, message):
-        self.url = url
-        PoolError.__init__(self, pool, message)
-
-    def __reduce__(self):
-        # For pickling purposes.
-        return self.__class__, (None, self.url, None)
-
-
-class SSLError(HTTPError):
-    "Raised when SSL certificate fails in an HTTPS connection."
-    pass
-
-
-class ProxyError(HTTPError):
-    "Raised when the connection to a proxy fails."
-    pass
-
-
-class DecodeError(HTTPError):
-    "Raised when automatic decoding based on Content-Type fails."
-    pass
-
-
-class ProtocolError(HTTPError):
-    "Raised when something unexpected happens mid-request/response."
-    pass
-
-
-#: Renamed to ProtocolError but aliased for backwards compatibility.
-ConnectionError = ProtocolError
-
-
-# Leaf Exceptions
-
-class MaxRetryError(RequestError):
-    """Raised when the maximum number of retries is exceeded.
-
-    :param pool: The connection pool
-    :type pool: :class:`~urllib3.connectionpool.HTTPConnectionPool`
-    :param string url: The requested Url
-    :param exceptions.Exception reason: The underlying error
-
-    """
-
-    def __init__(self, pool, url, reason=None):
-        self.reason = reason
-
-        message = "Max retries exceeded with url: %s (Caused by %r)" % (
-            url, reason)
-
-        RequestError.__init__(self, pool, url, message)
-
-
-class HostChangedError(RequestError):
-    "Raised when an existing pool gets a request for a foreign host."
-
-    def __init__(self, pool, url, retries=3):
-        message = "Tried to open a foreign host with url: %s" % url
-        RequestError.__init__(self, pool, url, message)
-        self.retries = retries
-
-
-class TimeoutStateError(HTTPError):
-    """ Raised when passing an invalid state to a timeout """
-    pass
-
-
-class TimeoutError(HTTPError):
-    """ Raised when a socket timeout error occurs.
-
-    Catching this error will catch both :exc:`ReadTimeoutErrors
-    <ReadTimeoutError>` and :exc:`ConnectTimeoutErrors <ConnectTimeoutError>`.
-    """
-    pass
-
-
-class ReadTimeoutError(TimeoutError, RequestError):
-    "Raised when a socket timeout occurs while receiving data from a server"
-    pass
-
-
-# This timeout error does not have a URL attached and needs to inherit from the
-# base HTTPError
-class ConnectTimeoutError(TimeoutError):
-    "Raised when a socket timeout occurs while connecting to a server"
-    pass
-
-
-class NewConnectionError(ConnectTimeoutError, PoolError):
-    "Raised when we fail to establish a new connection. Usually ECONNREFUSED."
-    pass
-
-
-class EmptyPoolError(PoolError):
-    "Raised when a pool runs out of connections and no more are allowed."
-    pass
-
-
-class ClosedPoolError(PoolError):
-    "Raised when a request enters a pool after the pool has been closed."
-    pass
-
-
-class LocationValueError(ValueError, HTTPError):
-    "Raised when there is something wrong with a given URL input."
-    pass
-
-
-class LocationParseError(LocationValueError):
-    "Raised when get_host or similar fails to parse the URL input."
-
-    def __init__(self, location):
-        message = "Failed to parse: %s" % location
-        HTTPError.__init__(self, message)
-
-        self.location = location
-
-
-class ResponseError(HTTPError):
-    "Used as a container for an error reason supplied in a MaxRetryError."
-    GENERIC_ERROR = 'too many error responses'
-    SPECIFIC_ERROR = 'too many {status_code} error responses'
-
-
-class SecurityWarning(HTTPWarning):
-    "Warned when performing security reducing actions"
-    pass
-
-
-class SubjectAltNameWarning(SecurityWarning):
-    "Warned when connecting to a host with a certificate missing a SAN."
-    pass
-
-
-class InsecureRequestWarning(SecurityWarning):
-    "Warned when making an unverified HTTPS request."
-    pass
-
-
-class SystemTimeWarning(SecurityWarning):
-    "Warned when system time is suspected to be wrong"
-    pass
-
-
-class InsecurePlatformWarning(SecurityWarning):
-    "Warned when certain SSL configuration is not available on a platform."
-    pass
-
-
-class SNIMissingWarning(HTTPWarning):
-    "Warned when making a HTTPS request without SNI available."
-    pass
-
-
-class DependencyWarning(HTTPWarning):
-    """
-    Warned when an attempt is made to import a module with missing optional
-    dependencies.
-    """
-    pass
-
-
-class ResponseNotChunked(ProtocolError, ValueError):
-    "Response needs to be chunked in order to read it as chunks."
-    pass
-
-
-class BodyNotHttplibCompatible(HTTPError):
-    """
-    Body should be httplib.HTTPResponse like (have an fp attribute which
-    returns raw chunks) for read_chunked().
-    """
-    pass
-
-
-class IncompleteRead(HTTPError, httplib_IncompleteRead):
-    """
-    Response length doesn't match expected Content-Length
-
-    Subclass of http_client.IncompleteRead to allow int value
-    for `partial` to avoid creating large objects on streamed
-    reads.
-    """
-    def __init__(self, partial, expected):
-        super(IncompleteRead, self).__init__(partial, expected)
-
-    def __repr__(self):
-        return ('IncompleteRead(%i bytes read, '
-                '%i more expected)' % (self.partial, self.expected))
-
-
-class InvalidHeader(HTTPError):
-    "The header provided was somehow invalid."
-    pass
-
-
-class ProxySchemeUnknown(AssertionError, ValueError):
-    "ProxyManager does not support the supplied scheme"
-    # TODO(t-8ch): Stop inheriting from AssertionError in v2.0.
-
-    def __init__(self, scheme):
-        message = "Not supported proxy scheme %s" % scheme
-        super(ProxySchemeUnknown, self).__init__(message)
-
-
-class HeaderParsingError(HTTPError):
-    "Raised by assert_header_parsing, but we convert it to a log.warning statement."
-    def __init__(self, defects, unparsed_data):
-        message = '%s, unparsed data: %r' % (defects or 'Unknown', unparsed_data)
-        super(HeaderParsingError, self).__init__(message)
-
-
-class UnrewindableBodyError(HTTPError):
-    "urllib3 encountered an error when trying to rewind a body"
-    pass
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/fields.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/fields.py
deleted file mode 100644
index 37fe64a..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/fields.py
+++ /dev/null
@@ -1,178 +0,0 @@
-from __future__ import absolute_import
-import email.utils
-import mimetypes
-
-from .packages import six
-
-
-def guess_content_type(filename, default='application/octet-stream'):
-    """
-    Guess the "Content-Type" of a file.
-
-    :param filename:
-        The filename to guess the "Content-Type" of using :mod:`mimetypes`.
-    :param default:
-        If no "Content-Type" can be guessed, default to `default`.
-    """
-    if filename:
-        return mimetypes.guess_type(filename)[0] or default
-    return default
-
-
-def format_header_param(name, value):
-    """
-    Helper function to format and quote a single header parameter.
-
-    Particularly useful for header parameters which might contain
-    non-ASCII values, like file names. This follows RFC 2231, as
-    suggested by RFC 2388 Section 4.4.
-
-    :param name:
-        The name of the parameter, a string expected to be ASCII only.
-    :param value:
-        The value of the parameter, provided as a unicode string.
-    """
-    if not any(ch in value for ch in '"\\\r\n'):
-        result = '%s="%s"' % (name, value)
-        try:
-            result.encode('ascii')
-        except (UnicodeEncodeError, UnicodeDecodeError):
-            pass
-        else:
-            return result
-    if not six.PY3 and isinstance(value, six.text_type):  # Python 2:
-        value = value.encode('utf-8')
-    value = email.utils.encode_rfc2231(value, 'utf-8')
-    value = '%s*=%s' % (name, value)
-    return value
-
-
-class RequestField(object):
-    """
-    A data container for request body parameters.
-
-    :param name:
-        The name of this request field.
-    :param data:
-        The data/value body.
-    :param filename:
-        An optional filename of the request field.
-    :param headers:
-        An optional dict-like object of headers to initially use for the field.
-    """
-    def __init__(self, name, data, filename=None, headers=None):
-        self._name = name
-        self._filename = filename
-        self.data = data
-        self.headers = {}
-        if headers:
-            self.headers = dict(headers)
-
-    @classmethod
-    def from_tuples(cls, fieldname, value):
-        """
-        A :class:`~urllib3.fields.RequestField` factory from old-style tuple parameters.
-
-        Supports constructing :class:`~urllib3.fields.RequestField` from
-        parameter of key/value strings AND key/filetuple. A filetuple is a
-        (filename, data, MIME type) tuple where the MIME type is optional.
-        For example::
-
-            'foo': 'bar',
-            'fakefile': ('foofile.txt', 'contents of foofile'),
-            'realfile': ('barfile.txt', open('realfile').read()),
-            'typedfile': ('bazfile.bin', open('bazfile').read(), 'image/jpeg'),
-            'nonamefile': 'contents of nonamefile field',
-
-        Field names and filenames must be unicode.
-        """
-        if isinstance(value, tuple):
-            if len(value) == 3:
-                filename, data, content_type = value
-            else:
-                filename, data = value
-                content_type = guess_content_type(filename)
-        else:
-            filename = None
-            content_type = None
-            data = value
-
-        request_param = cls(fieldname, data, filename=filename)
-        request_param.make_multipart(content_type=content_type)
-
-        return request_param
-
-    def _render_part(self, name, value):
-        """
-        Overridable helper function to format a single header parameter.
-
-        :param name:
-            The name of the parameter, a string expected to be ASCII only.
-        :param value:
-            The value of the parameter, provided as a unicode string.
-        """
-        return format_header_param(name, value)
-
-    def _render_parts(self, header_parts):
-        """
-        Helper function to format and quote a single header.
-
-        Useful for single headers that are composed of multiple items. E.g.,
-        'Content-Disposition' fields.
-
-        :param header_parts:
-            A sequence of (k, v) tuples or a :class:`dict` of (k, v) to format
-            as `k1="v1"; k2="v2"; ...`.
-        """
-        parts = []
-        iterable = header_parts
-        if isinstance(header_parts, dict):
-            iterable = header_parts.items()
-
-        for name, value in iterable:
-            if value is not None:
-                parts.append(self._render_part(name, value))
-
-        return '; '.join(parts)
-
-    def render_headers(self):
-        """
-        Renders the headers for this request field.
-        """
-        lines = []
-
-        sort_keys = ['Content-Disposition', 'Content-Type', 'Content-Location']
-        for sort_key in sort_keys:
-            if self.headers.get(sort_key, False):
-                lines.append('%s: %s' % (sort_key, self.headers[sort_key]))
-
-        for header_name, header_value in self.headers.items():
-            if header_name not in sort_keys:
-                if header_value:
-                    lines.append('%s: %s' % (header_name, header_value))
-
-        lines.append('\r\n')
-        return '\r\n'.join(lines)
-
-    def make_multipart(self, content_disposition=None, content_type=None,
-                       content_location=None):
-        """
-        Makes this request field into a multipart request field.
-
-        This method overrides "Content-Disposition", "Content-Type" and
-        "Content-Location" headers to the request parameter.
-
-        :param content_type:
-            The 'Content-Type' of the request body.
-        :param content_location:
-            The 'Content-Location' of the request body.
-
-        """
-        self.headers['Content-Disposition'] = content_disposition or 'form-data'
-        self.headers['Content-Disposition'] += '; '.join([
-            '', self._render_parts(
-                (('name', self._name), ('filename', self._filename))
-            )
-        ])
-        self.headers['Content-Type'] = content_type
-        self.headers['Content-Location'] = content_location
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/filepost.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/filepost.py
deleted file mode 100644
index 78f1e19..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/filepost.py
+++ /dev/null
@@ -1,98 +0,0 @@
-from __future__ import absolute_import
-import binascii
-import codecs
-import os
-
-from io import BytesIO
-
-from .packages import six
-from .packages.six import b
-from .fields import RequestField
-
-writer = codecs.lookup('utf-8')[3]
-
-
-def choose_boundary():
-    """
-    Our embarrassingly-simple replacement for mimetools.choose_boundary.
-    """
-    boundary = binascii.hexlify(os.urandom(16))
-    if six.PY3:
-        boundary = boundary.decode('ascii')
-    return boundary
-
-
-def iter_field_objects(fields):
-    """
-    Iterate over fields.
-
-    Supports list of (k, v) tuples and dicts, and lists of
-    :class:`~urllib3.fields.RequestField`.
-
-    """
-    if isinstance(fields, dict):
-        i = six.iteritems(fields)
-    else:
-        i = iter(fields)
-
-    for field in i:
-        if isinstance(field, RequestField):
-            yield field
-        else:
-            yield RequestField.from_tuples(*field)
-
-
-def iter_fields(fields):
-    """
-    .. deprecated:: 1.6
-
-    Iterate over fields.
-
-    The addition of :class:`~urllib3.fields.RequestField` makes this function
-    obsolete. Instead, use :func:`iter_field_objects`, which returns
-    :class:`~urllib3.fields.RequestField` objects.
-
-    Supports list of (k, v) tuples and dicts.
-    """
-    if isinstance(fields, dict):
-        return ((k, v) for k, v in six.iteritems(fields))
-
-    return ((k, v) for k, v in fields)
-
-
-def encode_multipart_formdata(fields, boundary=None):
-    """
-    Encode a dictionary of ``fields`` using the multipart/form-data MIME format.
-
-    :param fields:
-        Dictionary of fields or list of (key, :class:`~urllib3.fields.RequestField`).
-
-    :param boundary:
-        If not specified, then a random boundary will be generated using
-        :func:`urllib3.filepost.choose_boundary`.
-    """
-    body = BytesIO()
-    if boundary is None:
-        boundary = choose_boundary()
-
-    for field in iter_field_objects(fields):
-        body.write(b('--%s\r\n' % (boundary)))
-
-        writer(body).write(field.render_headers())
-        data = field.data
-
-        if isinstance(data, int):
-            data = str(data)  # Backwards compatibility
-
-        if isinstance(data, six.text_type):
-            writer(body).write(data)
-        else:
-            body.write(data)
-
-        body.write(b'\r\n')
-
-    body.write(b('--%s--\r\n' % (boundary)))
-
-    content_type = str('multipart/form-data; boundary=%s' % boundary)
-
-    return body.getvalue(), content_type
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/packages/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/packages/__init__.py
deleted file mode 100644
index 170e974..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/packages/__init__.py
+++ /dev/null
@@ -1,5 +0,0 @@
-from __future__ import absolute_import
-
-from . import ssl_match_hostname
-
-__all__ = ('ssl_match_hostname', )
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/packages/backports/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/packages/backports/__init__.py
deleted file mode 100644
index e69de29..0000000
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/packages/backports/makefile.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/packages/backports/makefile.py
deleted file mode 100644
index 740db37..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/packages/backports/makefile.py
+++ /dev/null
@@ -1,53 +0,0 @@
-# -*- coding: utf-8 -*-
-"""
-backports.makefile
-~~~~~~~~~~~~~~~~~~
-
-Backports the Python 3 ``socket.makefile`` method for use with anything that
-wants to create a "fake" socket object.
-"""
-import io
-
-from socket import SocketIO
-
-
-def backport_makefile(self, mode="r", buffering=None, encoding=None,
-                      errors=None, newline=None):
-    """
-    Backport of ``socket.makefile`` from Python 3.5.
-    """
-    if not set(mode) <= {"r", "w", "b"}:
-        raise ValueError(
-            "invalid mode %r (only r, w, b allowed)" % (mode,)
-        )
-    writing = "w" in mode
-    reading = "r" in mode or not writing
-    assert reading or writing
-    binary = "b" in mode
-    rawmode = ""
-    if reading:
-        rawmode += "r"
-    if writing:
-        rawmode += "w"
-    raw = SocketIO(self, rawmode)
-    self._makefile_refs += 1
-    if buffering is None:
-        buffering = -1
-    if buffering < 0:
-        buffering = io.DEFAULT_BUFFER_SIZE
-    if buffering == 0:
-        if not binary:
-            raise ValueError("unbuffered streams must be binary")
-        return raw
-    if reading and writing:
-        buffer = io.BufferedRWPair(raw, raw, buffering)
-    elif reading:
-        buffer = io.BufferedReader(raw, buffering)
-    else:
-        assert writing
-        buffer = io.BufferedWriter(raw, buffering)
-    if binary:
-        return buffer
-    text = io.TextIOWrapper(buffer, encoding, errors, newline)
-    text.mode = mode
-    return text
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/packages/six.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/packages/six.py
deleted file mode 100644
index 190c023..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/packages/six.py
+++ /dev/null
@@ -1,868 +0,0 @@
-"""Utilities for writing code that runs on Python 2 and 3"""
-
-# Copyright (c) 2010-2015 Benjamin Peterson
-#
-# Permission is hereby granted, free of charge, to any person obtaining a copy
-# of this software and associated documentation files (the "Software"), to deal
-# in the Software without restriction, including without limitation the rights
-# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-# copies of the Software, and to permit persons to whom the Software is
-# furnished to do so, subject to the following conditions:
-#
-# The above copyright notice and this permission notice shall be included in all
-# copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-# SOFTWARE.
-
-from __future__ import absolute_import
-
-import functools
-import itertools
-import operator
-import sys
-import types
-
-__author__ = "Benjamin Peterson <benjamin@python.org>"
-__version__ = "1.10.0"
-
-
-# Useful for very coarse version differentiation.
-PY2 = sys.version_info[0] == 2
-PY3 = sys.version_info[0] == 3
-PY34 = sys.version_info[0:2] >= (3, 4)
-
-if PY3:
-    string_types = str,
-    integer_types = int,
-    class_types = type,
-    text_type = str
-    binary_type = bytes
-
-    MAXSIZE = sys.maxsize
-else:
-    string_types = basestring,
-    integer_types = (int, long)
-    class_types = (type, types.ClassType)
-    text_type = unicode
-    binary_type = str
-
-    if sys.platform.startswith("java"):
-        # Jython always uses 32 bits.
-        MAXSIZE = int((1 << 31) - 1)
-    else:
-        # It's possible to have sizeof(long) != sizeof(Py_ssize_t).
-        class X(object):
-
-            def __len__(self):
-                return 1 << 31
-        try:
-            len(X())
-        except OverflowError:
-            # 32-bit
-            MAXSIZE = int((1 << 31) - 1)
-        else:
-            # 64-bit
-            MAXSIZE = int((1 << 63) - 1)
-        del X
-
-
-def _add_doc(func, doc):
-    """Add documentation to a function."""
-    func.__doc__ = doc
-
-
-def _import_module(name):
-    """Import module, returning the module after the last dot."""
-    __import__(name)
-    return sys.modules[name]
-
-
-class _LazyDescr(object):
-
-    def __init__(self, name):
-        self.name = name
-
-    def __get__(self, obj, tp):
-        result = self._resolve()
-        setattr(obj, self.name, result)  # Invokes __set__.
-        try:
-            # This is a bit ugly, but it avoids running this again by
-            # removing this descriptor.
-            delattr(obj.__class__, self.name)
-        except AttributeError:
-            pass
-        return result
-
-
-class MovedModule(_LazyDescr):
-
-    def __init__(self, name, old, new=None):
-        super(MovedModule, self).__init__(name)
-        if PY3:
-            if new is None:
-                new = name
-            self.mod = new
-        else:
-            self.mod = old
-
-    def _resolve(self):
-        return _import_module(self.mod)
-
-    def __getattr__(self, attr):
-        _module = self._resolve()
-        value = getattr(_module, attr)
-        setattr(self, attr, value)
-        return value
-
-
-class _LazyModule(types.ModuleType):
-
-    def __init__(self, name):
-        super(_LazyModule, self).__init__(name)
-        self.__doc__ = self.__class__.__doc__
-
-    def __dir__(self):
-        attrs = ["__doc__", "__name__"]
-        attrs += [attr.name for attr in self._moved_attributes]
-        return attrs
-
-    # Subclasses should override this
-    _moved_attributes = []
-
-
-class MovedAttribute(_LazyDescr):
-
-    def __init__(self, name, old_mod, new_mod, old_attr=None, new_attr=None):
-        super(MovedAttribute, self).__init__(name)
-        if PY3:
-            if new_mod is None:
-                new_mod = name
-            self.mod = new_mod
-            if new_attr is None:
-                if old_attr is None:
-                    new_attr = name
-                else:
-                    new_attr = old_attr
-            self.attr = new_attr
-        else:
-            self.mod = old_mod
-            if old_attr is None:
-                old_attr = name
-            self.attr = old_attr
-
-    def _resolve(self):
-        module = _import_module(self.mod)
-        return getattr(module, self.attr)
-
-
-class _SixMetaPathImporter(object):
-
-    """
-    A meta path importer to import six.moves and its submodules.
-
-    This class implements a PEP302 finder and loader. It should be compatible
-    with Python 2.5 and all existing versions of Python3
-    """
-
-    def __init__(self, six_module_name):
-        self.name = six_module_name
-        self.known_modules = {}
-
-    def _add_module(self, mod, *fullnames):
-        for fullname in fullnames:
-            self.known_modules[self.name + "." + fullname] = mod
-
-    def _get_module(self, fullname):
-        return self.known_modules[self.name + "." + fullname]
-
-    def find_module(self, fullname, path=None):
-        if fullname in self.known_modules:
-            return self
-        return None
-
-    def __get_module(self, fullname):
-        try:
-            return self.known_modules[fullname]
-        except KeyError:
-            raise ImportError("This loader does not know module " + fullname)
-
-    def load_module(self, fullname):
-        try:
-            # in case of a reload
-            return sys.modules[fullname]
-        except KeyError:
-            pass
-        mod = self.__get_module(fullname)
-        if isinstance(mod, MovedModule):
-            mod = mod._resolve()
-        else:
-            mod.__loader__ = self
-        sys.modules[fullname] = mod
-        return mod
-
-    def is_package(self, fullname):
-        """
-        Return true, if the named module is a package.
-
-        We need this method to get correct spec objects with
-        Python 3.4 (see PEP451)
-        """
-        return hasattr(self.__get_module(fullname), "__path__")
-
-    def get_code(self, fullname):
-        """Return None
-
-        Required, if is_package is implemented"""
-        self.__get_module(fullname)  # eventually raises ImportError
-        return None
-    get_source = get_code  # same as get_code
-
-_importer = _SixMetaPathImporter(__name__)
-
-
-class _MovedItems(_LazyModule):
-
-    """Lazy loading of moved objects"""
-    __path__ = []  # mark as package
-
-
-_moved_attributes = [
-    MovedAttribute("cStringIO", "cStringIO", "io", "StringIO"),
-    MovedAttribute("filter", "itertools", "builtins", "ifilter", "filter"),
-    MovedAttribute("filterfalse", "itertools", "itertools", "ifilterfalse", "filterfalse"),
-    MovedAttribute("input", "__builtin__", "builtins", "raw_input", "input"),
-    MovedAttribute("intern", "__builtin__", "sys"),
-    MovedAttribute("map", "itertools", "builtins", "imap", "map"),
-    MovedAttribute("getcwd", "os", "os", "getcwdu", "getcwd"),
-    MovedAttribute("getcwdb", "os", "os", "getcwd", "getcwdb"),
-    MovedAttribute("range", "__builtin__", "builtins", "xrange", "range"),
-    MovedAttribute("reload_module", "__builtin__", "importlib" if PY34 else "imp", "reload"),
-    MovedAttribute("reduce", "__builtin__", "functools"),
-    MovedAttribute("shlex_quote", "pipes", "shlex", "quote"),
-    MovedAttribute("StringIO", "StringIO", "io"),
-    MovedAttribute("UserDict", "UserDict", "collections"),
-    MovedAttribute("UserList", "UserList", "collections"),
-    MovedAttribute("UserString", "UserString", "collections"),
-    MovedAttribute("xrange", "__builtin__", "builtins", "xrange", "range"),
-    MovedAttribute("zip", "itertools", "builtins", "izip", "zip"),
-    MovedAttribute("zip_longest", "itertools", "itertools", "izip_longest", "zip_longest"),
-    MovedModule("builtins", "__builtin__"),
-    MovedModule("configparser", "ConfigParser"),
-    MovedModule("copyreg", "copy_reg"),
-    MovedModule("dbm_gnu", "gdbm", "dbm.gnu"),
-    MovedModule("_dummy_thread", "dummy_thread", "_dummy_thread"),
-    MovedModule("http_cookiejar", "cookielib", "http.cookiejar"),
-    MovedModule("http_cookies", "Cookie", "http.cookies"),
-    MovedModule("html_entities", "htmlentitydefs", "html.entities"),
-    MovedModule("html_parser", "HTMLParser", "html.parser"),
-    MovedModule("http_client", "httplib", "http.client"),
-    MovedModule("email_mime_multipart", "email.MIMEMultipart", "email.mime.multipart"),
-    MovedModule("email_mime_nonmultipart", "email.MIMENonMultipart", "email.mime.nonmultipart"),
-    MovedModule("email_mime_text", "email.MIMEText", "email.mime.text"),
-    MovedModule("email_mime_base", "email.MIMEBase", "email.mime.base"),
-    MovedModule("BaseHTTPServer", "BaseHTTPServer", "http.server"),
-    MovedModule("CGIHTTPServer", "CGIHTTPServer", "http.server"),
-    MovedModule("SimpleHTTPServer", "SimpleHTTPServer", "http.server"),
-    MovedModule("cPickle", "cPickle", "pickle"),
-    MovedModule("queue", "Queue"),
-    MovedModule("reprlib", "repr"),
-    MovedModule("socketserver", "SocketServer"),
-    MovedModule("_thread", "thread", "_thread"),
-    MovedModule("tkinter", "Tkinter"),
-    MovedModule("tkinter_dialog", "Dialog", "tkinter.dialog"),
-    MovedModule("tkinter_filedialog", "FileDialog", "tkinter.filedialog"),
-    MovedModule("tkinter_scrolledtext", "ScrolledText", "tkinter.scrolledtext"),
-    MovedModule("tkinter_simpledialog", "SimpleDialog", "tkinter.simpledialog"),
-    MovedModule("tkinter_tix", "Tix", "tkinter.tix"),
-    MovedModule("tkinter_ttk", "ttk", "tkinter.ttk"),
-    MovedModule("tkinter_constants", "Tkconstants", "tkinter.constants"),
-    MovedModule("tkinter_dnd", "Tkdnd", "tkinter.dnd"),
-    MovedModule("tkinter_colorchooser", "tkColorChooser",
-                "tkinter.colorchooser"),
-    MovedModule("tkinter_commondialog", "tkCommonDialog",
-                "tkinter.commondialog"),
-    MovedModule("tkinter_tkfiledialog", "tkFileDialog", "tkinter.filedialog"),
-    MovedModule("tkinter_font", "tkFont", "tkinter.font"),
-    MovedModule("tkinter_messagebox", "tkMessageBox", "tkinter.messagebox"),
-    MovedModule("tkinter_tksimpledialog", "tkSimpleDialog",
-                "tkinter.simpledialog"),
-    MovedModule("urllib_parse", __name__ + ".moves.urllib_parse", "urllib.parse"),
-    MovedModule("urllib_error", __name__ + ".moves.urllib_error", "urllib.error"),
-    MovedModule("urllib", __name__ + ".moves.urllib", __name__ + ".moves.urllib"),
-    MovedModule("urllib_robotparser", "robotparser", "urllib.robotparser"),
-    MovedModule("xmlrpc_client", "xmlrpclib", "xmlrpc.client"),
-    MovedModule("xmlrpc_server", "SimpleXMLRPCServer", "xmlrpc.server"),
-]
-# Add windows specific modules.
-if sys.platform == "win32":
-    _moved_attributes += [
-        MovedModule("winreg", "_winreg"),
-    ]
-
-for attr in _moved_attributes:
-    setattr(_MovedItems, attr.name, attr)
-    if isinstance(attr, MovedModule):
-        _importer._add_module(attr, "moves." + attr.name)
-del attr
-
-_MovedItems._moved_attributes = _moved_attributes
-
-moves = _MovedItems(__name__ + ".moves")
-_importer._add_module(moves, "moves")
-
-
-class Module_six_moves_urllib_parse(_LazyModule):
-
-    """Lazy loading of moved objects in six.moves.urllib_parse"""
-
-
-_urllib_parse_moved_attributes = [
-    MovedAttribute("ParseResult", "urlparse", "urllib.parse"),
-    MovedAttribute("SplitResult", "urlparse", "urllib.parse"),
-    MovedAttribute("parse_qs", "urlparse", "urllib.parse"),
-    MovedAttribute("parse_qsl", "urlparse", "urllib.parse"),
-    MovedAttribute("urldefrag", "urlparse", "urllib.parse"),
-    MovedAttribute("urljoin", "urlparse", "urllib.parse"),
-    MovedAttribute("urlparse", "urlparse", "urllib.parse"),
-    MovedAttribute("urlsplit", "urlparse", "urllib.parse"),
-    MovedAttribute("urlunparse", "urlparse", "urllib.parse"),
-    MovedAttribute("urlunsplit", "urlparse", "urllib.parse"),
-    MovedAttribute("quote", "urllib", "urllib.parse"),
-    MovedAttribute("quote_plus", "urllib", "urllib.parse"),
-    MovedAttribute("unquote", "urllib", "urllib.parse"),
-    MovedAttribute("unquote_plus", "urllib", "urllib.parse"),
-    MovedAttribute("urlencode", "urllib", "urllib.parse"),
-    MovedAttribute("splitquery", "urllib", "urllib.parse"),
-    MovedAttribute("splittag", "urllib", "urllib.parse"),
-    MovedAttribute("splituser", "urllib", "urllib.parse"),
-    MovedAttribute("uses_fragment", "urlparse", "urllib.parse"),
-    MovedAttribute("uses_netloc", "urlparse", "urllib.parse"),
-    MovedAttribute("uses_params", "urlparse", "urllib.parse"),
-    MovedAttribute("uses_query", "urlparse", "urllib.parse"),
-    MovedAttribute("uses_relative", "urlparse", "urllib.parse"),
-]
-for attr in _urllib_parse_moved_attributes:
-    setattr(Module_six_moves_urllib_parse, attr.name, attr)
-del attr
-
-Module_six_moves_urllib_parse._moved_attributes = _urllib_parse_moved_attributes
-
-_importer._add_module(Module_six_moves_urllib_parse(__name__ + ".moves.urllib_parse"),
-                      "moves.urllib_parse", "moves.urllib.parse")
-
-
-class Module_six_moves_urllib_error(_LazyModule):
-
-    """Lazy loading of moved objects in six.moves.urllib_error"""
-
-
-_urllib_error_moved_attributes = [
-    MovedAttribute("URLError", "urllib2", "urllib.error"),
-    MovedAttribute("HTTPError", "urllib2", "urllib.error"),
-    MovedAttribute("ContentTooShortError", "urllib", "urllib.error"),
-]
-for attr in _urllib_error_moved_attributes:
-    setattr(Module_six_moves_urllib_error, attr.name, attr)
-del attr
-
-Module_six_moves_urllib_error._moved_attributes = _urllib_error_moved_attributes
-
-_importer._add_module(Module_six_moves_urllib_error(__name__ + ".moves.urllib.error"),
-                      "moves.urllib_error", "moves.urllib.error")
-
-
-class Module_six_moves_urllib_request(_LazyModule):
-
-    """Lazy loading of moved objects in six.moves.urllib_request"""
-
-
-_urllib_request_moved_attributes = [
-    MovedAttribute("urlopen", "urllib2", "urllib.request"),
-    MovedAttribute("install_opener", "urllib2", "urllib.request"),
-    MovedAttribute("build_opener", "urllib2", "urllib.request"),
-    MovedAttribute("pathname2url", "urllib", "urllib.request"),
-    MovedAttribute("url2pathname", "urllib", "urllib.request"),
-    MovedAttribute("getproxies", "urllib", "urllib.request"),
-    MovedAttribute("Request", "urllib2", "urllib.request"),
-    MovedAttribute("OpenerDirector", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPDefaultErrorHandler", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPRedirectHandler", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPCookieProcessor", "urllib2", "urllib.request"),
-    MovedAttribute("ProxyHandler", "urllib2", "urllib.request"),
-    MovedAttribute("BaseHandler", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPPasswordMgr", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPPasswordMgrWithDefaultRealm", "urllib2", "urllib.request"),
-    MovedAttribute("AbstractBasicAuthHandler", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPBasicAuthHandler", "urllib2", "urllib.request"),
-    MovedAttribute("ProxyBasicAuthHandler", "urllib2", "urllib.request"),
-    MovedAttribute("AbstractDigestAuthHandler", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPDigestAuthHandler", "urllib2", "urllib.request"),
-    MovedAttribute("ProxyDigestAuthHandler", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPHandler", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPSHandler", "urllib2", "urllib.request"),
-    MovedAttribute("FileHandler", "urllib2", "urllib.request"),
-    MovedAttribute("FTPHandler", "urllib2", "urllib.request"),
-    MovedAttribute("CacheFTPHandler", "urllib2", "urllib.request"),
-    MovedAttribute("UnknownHandler", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPErrorProcessor", "urllib2", "urllib.request"),
-    MovedAttribute("urlretrieve", "urllib", "urllib.request"),
-    MovedAttribute("urlcleanup", "urllib", "urllib.request"),
-    MovedAttribute("URLopener", "urllib", "urllib.request"),
-    MovedAttribute("FancyURLopener", "urllib", "urllib.request"),
-    MovedAttribute("proxy_bypass", "urllib", "urllib.request"),
-]
-for attr in _urllib_request_moved_attributes:
-    setattr(Module_six_moves_urllib_request, attr.name, attr)
-del attr
-
-Module_six_moves_urllib_request._moved_attributes = _urllib_request_moved_attributes
-
-_importer._add_module(Module_six_moves_urllib_request(__name__ + ".moves.urllib.request"),
-                      "moves.urllib_request", "moves.urllib.request")
-
-
-class Module_six_moves_urllib_response(_LazyModule):
-
-    """Lazy loading of moved objects in six.moves.urllib_response"""
-
-
-_urllib_response_moved_attributes = [
-    MovedAttribute("addbase", "urllib", "urllib.response"),
-    MovedAttribute("addclosehook", "urllib", "urllib.response"),
-    MovedAttribute("addinfo", "urllib", "urllib.response"),
-    MovedAttribute("addinfourl", "urllib", "urllib.response"),
-]
-for attr in _urllib_response_moved_attributes:
-    setattr(Module_six_moves_urllib_response, attr.name, attr)
-del attr
-
-Module_six_moves_urllib_response._moved_attributes = _urllib_response_moved_attributes
-
-_importer._add_module(Module_six_moves_urllib_response(__name__ + ".moves.urllib.response"),
-                      "moves.urllib_response", "moves.urllib.response")
-
-
-class Module_six_moves_urllib_robotparser(_LazyModule):
-
-    """Lazy loading of moved objects in six.moves.urllib_robotparser"""
-
-
-_urllib_robotparser_moved_attributes = [
-    MovedAttribute("RobotFileParser", "robotparser", "urllib.robotparser"),
-]
-for attr in _urllib_robotparser_moved_attributes:
-    setattr(Module_six_moves_urllib_robotparser, attr.name, attr)
-del attr
-
-Module_six_moves_urllib_robotparser._moved_attributes = _urllib_robotparser_moved_attributes
-
-_importer._add_module(Module_six_moves_urllib_robotparser(__name__ + ".moves.urllib.robotparser"),
-                      "moves.urllib_robotparser", "moves.urllib.robotparser")
-
-
-class Module_six_moves_urllib(types.ModuleType):
-
-    """Create a six.moves.urllib namespace that resembles the Python 3 namespace"""
-    __path__ = []  # mark as package
-    parse = _importer._get_module("moves.urllib_parse")
-    error = _importer._get_module("moves.urllib_error")
-    request = _importer._get_module("moves.urllib_request")
-    response = _importer._get_module("moves.urllib_response")
-    robotparser = _importer._get_module("moves.urllib_robotparser")
-
-    def __dir__(self):
-        return ['parse', 'error', 'request', 'response', 'robotparser']
-
-_importer._add_module(Module_six_moves_urllib(__name__ + ".moves.urllib"),
-                      "moves.urllib")
-
-
-def add_move(move):
-    """Add an item to six.moves."""
-    setattr(_MovedItems, move.name, move)
-
-
-def remove_move(name):
-    """Remove item from six.moves."""
-    try:
-        delattr(_MovedItems, name)
-    except AttributeError:
-        try:
-            del moves.__dict__[name]
-        except KeyError:
-            raise AttributeError("no such move, %r" % (name,))
-
-
-if PY3:
-    _meth_func = "__func__"
-    _meth_self = "__self__"
-
-    _func_closure = "__closure__"
-    _func_code = "__code__"
-    _func_defaults = "__defaults__"
-    _func_globals = "__globals__"
-else:
-    _meth_func = "im_func"
-    _meth_self = "im_self"
-
-    _func_closure = "func_closure"
-    _func_code = "func_code"
-    _func_defaults = "func_defaults"
-    _func_globals = "func_globals"
-
-
-try:
-    advance_iterator = next
-except NameError:
-    def advance_iterator(it):
-        return it.next()
-next = advance_iterator
-
-
-try:
-    callable = callable
-except NameError:
-    def callable(obj):
-        return any("__call__" in klass.__dict__ for klass in type(obj).__mro__)
-
-
-if PY3:
-    def get_unbound_function(unbound):
-        return unbound
-
-    create_bound_method = types.MethodType
-
-    def create_unbound_method(func, cls):
-        return func
-
-    Iterator = object
-else:
-    def get_unbound_function(unbound):
-        return unbound.im_func
-
-    def create_bound_method(func, obj):
-        return types.MethodType(func, obj, obj.__class__)
-
-    def create_unbound_method(func, cls):
-        return types.MethodType(func, None, cls)
-
-    class Iterator(object):
-
-        def next(self):
-            return type(self).__next__(self)
-
-    callable = callable
-_add_doc(get_unbound_function,
-         """Get the function out of a possibly unbound function""")
-
-
-get_method_function = operator.attrgetter(_meth_func)
-get_method_self = operator.attrgetter(_meth_self)
-get_function_closure = operator.attrgetter(_func_closure)
-get_function_code = operator.attrgetter(_func_code)
-get_function_defaults = operator.attrgetter(_func_defaults)
-get_function_globals = operator.attrgetter(_func_globals)
-
-
-if PY3:
-    def iterkeys(d, **kw):
-        return iter(d.keys(**kw))
-
-    def itervalues(d, **kw):
-        return iter(d.values(**kw))
-
-    def iteritems(d, **kw):
-        return iter(d.items(**kw))
-
-    def iterlists(d, **kw):
-        return iter(d.lists(**kw))
-
-    viewkeys = operator.methodcaller("keys")
-
-    viewvalues = operator.methodcaller("values")
-
-    viewitems = operator.methodcaller("items")
-else:
-    def iterkeys(d, **kw):
-        return d.iterkeys(**kw)
-
-    def itervalues(d, **kw):
-        return d.itervalues(**kw)
-
-    def iteritems(d, **kw):
-        return d.iteritems(**kw)
-
-    def iterlists(d, **kw):
-        return d.iterlists(**kw)
-
-    viewkeys = operator.methodcaller("viewkeys")
-
-    viewvalues = operator.methodcaller("viewvalues")
-
-    viewitems = operator.methodcaller("viewitems")
-
-_add_doc(iterkeys, "Return an iterator over the keys of a dictionary.")
-_add_doc(itervalues, "Return an iterator over the values of a dictionary.")
-_add_doc(iteritems,
-         "Return an iterator over the (key, value) pairs of a dictionary.")
-_add_doc(iterlists,
-         "Return an iterator over the (key, [values]) pairs of a dictionary.")
-
-
-if PY3:
-    def b(s):
-        return s.encode("latin-1")
-
-    def u(s):
-        return s
-    unichr = chr
-    import struct
-    int2byte = struct.Struct(">B").pack
-    del struct
-    byte2int = operator.itemgetter(0)
-    indexbytes = operator.getitem
-    iterbytes = iter
-    import io
-    StringIO = io.StringIO
-    BytesIO = io.BytesIO
-    _assertCountEqual = "assertCountEqual"
-    if sys.version_info[1] <= 1:
-        _assertRaisesRegex = "assertRaisesRegexp"
-        _assertRegex = "assertRegexpMatches"
-    else:
-        _assertRaisesRegex = "assertRaisesRegex"
-        _assertRegex = "assertRegex"
-else:
-    def b(s):
-        return s
-    # Workaround for standalone backslash
-
-    def u(s):
-        return unicode(s.replace(r'\\', r'\\\\'), "unicode_escape")
-    unichr = unichr
-    int2byte = chr
-
-    def byte2int(bs):
-        return ord(bs[0])
-
-    def indexbytes(buf, i):
-        return ord(buf[i])
-    iterbytes = functools.partial(itertools.imap, ord)
-    import StringIO
-    StringIO = BytesIO = StringIO.StringIO
-    _assertCountEqual = "assertItemsEqual"
-    _assertRaisesRegex = "assertRaisesRegexp"
-    _assertRegex = "assertRegexpMatches"
-_add_doc(b, """Byte literal""")
-_add_doc(u, """Text literal""")
-
-
-def assertCountEqual(self, *args, **kwargs):
-    return getattr(self, _assertCountEqual)(*args, **kwargs)
-
-
-def assertRaisesRegex(self, *args, **kwargs):
-    return getattr(self, _assertRaisesRegex)(*args, **kwargs)
-
-
-def assertRegex(self, *args, **kwargs):
-    return getattr(self, _assertRegex)(*args, **kwargs)
-
-
-if PY3:
-    exec_ = getattr(moves.builtins, "exec")
-
-    def reraise(tp, value, tb=None):
-        if value is None:
-            value = tp()
-        if value.__traceback__ is not tb:
-            raise value.with_traceback(tb)
-        raise value
-
-else:
-    def exec_(_code_, _globs_=None, _locs_=None):
-        """Execute code in a namespace."""
-        if _globs_ is None:
-            frame = sys._getframe(1)
-            _globs_ = frame.f_globals
-            if _locs_ is None:
-                _locs_ = frame.f_locals
-            del frame
-        elif _locs_ is None:
-            _locs_ = _globs_
-        exec("""exec _code_ in _globs_, _locs_""")
-
-    exec_("""def reraise(tp, value, tb=None):
-    raise tp, value, tb
-""")
-
-
-if sys.version_info[:2] == (3, 2):
-    exec_("""def raise_from(value, from_value):
-    if from_value is None:
-        raise value
-    raise value from from_value
-""")
-elif sys.version_info[:2] > (3, 2):
-    exec_("""def raise_from(value, from_value):
-    raise value from from_value
-""")
-else:
-    def raise_from(value, from_value):
-        raise value
-
-
-print_ = getattr(moves.builtins, "print", None)
-if print_ is None:
-    def print_(*args, **kwargs):
-        """The new-style print function for Python 2.4 and 2.5."""
-        fp = kwargs.pop("file", sys.stdout)
-        if fp is None:
-            return
-
-        def write(data):
-            if not isinstance(data, basestring):
-                data = str(data)
-            # If the file has an encoding, encode unicode with it.
-            if (isinstance(fp, file) and
-                    isinstance(data, unicode) and
-                    fp.encoding is not None):
-                errors = getattr(fp, "errors", None)
-                if errors is None:
-                    errors = "strict"
-                data = data.encode(fp.encoding, errors)
-            fp.write(data)
-        want_unicode = False
-        sep = kwargs.pop("sep", None)
-        if sep is not None:
-            if isinstance(sep, unicode):
-                want_unicode = True
-            elif not isinstance(sep, str):
-                raise TypeError("sep must be None or a string")
-        end = kwargs.pop("end", None)
-        if end is not None:
-            if isinstance(end, unicode):
-                want_unicode = True
-            elif not isinstance(end, str):
-                raise TypeError("end must be None or a string")
-        if kwargs:
-            raise TypeError("invalid keyword arguments to print()")
-        if not want_unicode:
-            for arg in args:
-                if isinstance(arg, unicode):
-                    want_unicode = True
-                    break
-        if want_unicode:
-            newline = unicode("\n")
-            space = unicode(" ")
-        else:
-            newline = "\n"
-            space = " "
-        if sep is None:
-            sep = space
-        if end is None:
-            end = newline
-        for i, arg in enumerate(args):
-            if i:
-                write(sep)
-            write(arg)
-        write(end)
-if sys.version_info[:2] < (3, 3):
-    _print = print_
-
-    def print_(*args, **kwargs):
-        fp = kwargs.get("file", sys.stdout)
-        flush = kwargs.pop("flush", False)
-        _print(*args, **kwargs)
-        if flush and fp is not None:
-            fp.flush()
-
-_add_doc(reraise, """Reraise an exception.""")
-
-if sys.version_info[0:2] < (3, 4):
-    def wraps(wrapped, assigned=functools.WRAPPER_ASSIGNMENTS,
-              updated=functools.WRAPPER_UPDATES):
-        def wrapper(f):
-            f = functools.wraps(wrapped, assigned, updated)(f)
-            f.__wrapped__ = wrapped
-            return f
-        return wrapper
-else:
-    wraps = functools.wraps
-
-
-def with_metaclass(meta, *bases):
-    """Create a base class with a metaclass."""
-    # This requires a bit of explanation: the basic idea is to make a dummy
-    # metaclass for one level of class instantiation that replaces itself with
-    # the actual metaclass.
-    class metaclass(meta):
-
-        def __new__(cls, name, this_bases, d):
-            return meta(name, bases, d)
-    return type.__new__(metaclass, 'temporary_class', (), {})
-
-
-def add_metaclass(metaclass):
-    """Class decorator for creating a class with a metaclass."""
-    def wrapper(cls):
-        orig_vars = cls.__dict__.copy()
-        slots = orig_vars.get('__slots__')
-        if slots is not None:
-            if isinstance(slots, str):
-                slots = [slots]
-            for slots_var in slots:
-                orig_vars.pop(slots_var)
-        orig_vars.pop('__dict__', None)
-        orig_vars.pop('__weakref__', None)
-        return metaclass(cls.__name__, cls.__bases__, orig_vars)
-    return wrapper
-
-
-def python_2_unicode_compatible(klass):
-    """
-    A decorator that defines __unicode__ and __str__ methods under Python 2.
-    Under Python 3 it does nothing.
-
-    To support Python 2 and 3 with a single code base, define a __str__ method
-    returning text and apply this decorator to the class.
-    """
-    if PY2:
-        if '__str__' not in klass.__dict__:
-            raise ValueError("@python_2_unicode_compatible cannot be applied "
-                             "to %s because it doesn't define __str__()." %
-                             klass.__name__)
-        klass.__unicode__ = klass.__str__
-        klass.__str__ = lambda self: self.__unicode__().encode('utf-8')
-    return klass
-
-
-# Complete the moves implementation.
-# This code is at the end of this module to speed up module loading.
-# Turn this module into a package.
-__path__ = []  # required for PEP 302 and PEP 451
-__package__ = __name__  # see PEP 366 @ReservedAssignment
-if globals().get("__spec__") is not None:
-    __spec__.submodule_search_locations = []  # PEP 451 @UndefinedVariable
-# Remove other six meta path importers, since they cause problems. This can
-# happen if six is removed from sys.modules and then reloaded. (Setuptools does
-# this for some reason.)
-if sys.meta_path:
-    for i, importer in enumerate(sys.meta_path):
-        # Here's some real nastiness: Another "instance" of the six module might
-        # be floating around. Therefore, we can't use isinstance() to check for
-        # the six meta path importer, since the other six instance will have
-        # inserted an importer with different class.
-        if (type(importer).__name__ == "_SixMetaPathImporter" and
-                importer.name == __name__):
-            del sys.meta_path[i]
-            break
-    del i, importer
-# Finally, add the importer to the meta path import hook.
-sys.meta_path.append(_importer)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/packages/ssl_match_hostname/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/packages/ssl_match_hostname/__init__.py
deleted file mode 100644
index d6594eb..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/packages/ssl_match_hostname/__init__.py
+++ /dev/null
@@ -1,19 +0,0 @@
-import sys
-
-try:
-    # Our match_hostname function is the same as 3.5's, so we only want to
-    # import the match_hostname function if it's at least that good.
-    if sys.version_info < (3, 5):
-        raise ImportError("Fallback to vendored code")
-
-    from ssl import CertificateError, match_hostname
-except ImportError:
-    try:
-        # Backport of the function from a pypi module
-        from backports.ssl_match_hostname import CertificateError, match_hostname
-    except ImportError:
-        # Our vendored copy
-        from ._implementation import CertificateError, match_hostname
-
-# Not needed, but documenting what we provide.
-__all__ = ('CertificateError', 'match_hostname')
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/packages/ssl_match_hostname/_implementation.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/packages/ssl_match_hostname/_implementation.py
deleted file mode 100644
index 970cf65..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/packages/ssl_match_hostname/_implementation.py
+++ /dev/null
@@ -1,156 +0,0 @@
-"""The match_hostname() function from Python 3.3.3, essential when using SSL."""
-
-# Note: This file is under the PSF license as the code comes from the python
-# stdlib.   http://docs.python.org/3/license.html
-
-import re
-import sys
-
-# ipaddress has been backported to 2.6+ in pypi.  If it is installed on the
-# system, use it to handle IPAddress ServerAltnames (this was added in
-# python-3.5) otherwise only do DNS matching.  This allows
-# backports.ssl_match_hostname to continue to be used in Python 2.7.
-try:
-    from pip._vendor import ipaddress
-except ImportError:
-    ipaddress = None
-
-__version__ = '3.5.0.1'
-
-
-class CertificateError(ValueError):
-    pass
-
-
-def _dnsname_match(dn, hostname, max_wildcards=1):
-    """Matching according to RFC 6125, section 6.4.3
-
-    http://tools.ietf.org/html/rfc6125#section-6.4.3
-    """
-    pats = []
-    if not dn:
-        return False
-
-    # Ported from python3-syntax:
-    # leftmost, *remainder = dn.split(r'.')
-    parts = dn.split(r'.')
-    leftmost = parts[0]
-    remainder = parts[1:]
-
-    wildcards = leftmost.count('*')
-    if wildcards > max_wildcards:
-        # Issue #17980: avoid denials of service by refusing more
-        # than one wildcard per fragment.  A survey of established
-        # policy among SSL implementations showed it to be a
-        # reasonable choice.
-        raise CertificateError(
-            "too many wildcards in certificate DNS name: " + repr(dn))
-
-    # speed up common case w/o wildcards
-    if not wildcards:
-        return dn.lower() == hostname.lower()
-
-    # RFC 6125, section 6.4.3, subitem 1.
-    # The client SHOULD NOT attempt to match a presented identifier in which
-    # the wildcard character comprises a label other than the left-most label.
-    if leftmost == '*':
-        # When '*' is a fragment by itself, it matches a non-empty dotless
-        # fragment.
-        pats.append('[^.]+')
-    elif leftmost.startswith('xn--') or hostname.startswith('xn--'):
-        # RFC 6125, section 6.4.3, subitem 3.
-        # The client SHOULD NOT attempt to match a presented identifier
-        # where the wildcard character is embedded within an A-label or
-        # U-label of an internationalized domain name.
-        pats.append(re.escape(leftmost))
-    else:
-        # Otherwise, '*' matches any dotless string, e.g. www*
-        pats.append(re.escape(leftmost).replace(r'\*', '[^.]*'))
-
-    # add the remaining fragments, ignore any wildcards
-    for frag in remainder:
-        pats.append(re.escape(frag))
-
-    pat = re.compile(r'\A' + r'\.'.join(pats) + r'\Z', re.IGNORECASE)
-    return pat.match(hostname)
-
-
-def _to_unicode(obj):
-    if isinstance(obj, str) and sys.version_info < (3,):
-        obj = unicode(obj, encoding='ascii', errors='strict')
-    return obj
-
-def _ipaddress_match(ipname, host_ip):
-    """Exact matching of IP addresses.
-
-    RFC 6125 explicitly doesn't define an algorithm for this
-    (section 1.7.2 - "Out of Scope").
-    """
-    # OpenSSL may add a trailing newline to a subjectAltName's IP address
-    # Divergence from upstream: ipaddress can't handle byte str
-    ip = ipaddress.ip_address(_to_unicode(ipname).rstrip())
-    return ip == host_ip
-
-
-def match_hostname(cert, hostname):
-    """Verify that *cert* (in decoded format as returned by
-    SSLSocket.getpeercert()) matches the *hostname*.  RFC 2818 and RFC 6125
-    rules are followed, but IP addresses are not accepted for *hostname*.
-
-    CertificateError is raised on failure. On success, the function
-    returns nothing.
-    """
-    if not cert:
-        raise ValueError("empty or no certificate, match_hostname needs a "
-                         "SSL socket or SSL context with either "
-                         "CERT_OPTIONAL or CERT_REQUIRED")
-    try:
-        # Divergence from upstream: ipaddress can't handle byte str
-        host_ip = ipaddress.ip_address(_to_unicode(hostname))
-    except ValueError:
-        # Not an IP address (common case)
-        host_ip = None
-    except UnicodeError:
-        # Divergence from upstream: Have to deal with ipaddress not taking
-        # byte strings.  addresses should be all ascii, so we consider it not
-        # an ipaddress in this case
-        host_ip = None
-    except AttributeError:
-        # Divergence from upstream: Make ipaddress library optional
-        if ipaddress is None:
-            host_ip = None
-        else:
-            raise
-    dnsnames = []
-    san = cert.get('subjectAltName', ())
-    for key, value in san:
-        if key == 'DNS':
-            if host_ip is None and _dnsname_match(value, hostname):
-                return
-            dnsnames.append(value)
-        elif key == 'IP Address':
-            if host_ip is not None and _ipaddress_match(value, host_ip):
-                return
-            dnsnames.append(value)
-    if not dnsnames:
-        # The subject is only checked when there is no dNSName entry
-        # in subjectAltName
-        for sub in cert.get('subject', ()):
-            for key, value in sub:
-                # XXX according to RFC 2818, the most specific Common Name
-                # must be used.
-                if key == 'commonName':
-                    if _dnsname_match(value, hostname):
-                        return
-                    dnsnames.append(value)
-    if len(dnsnames) > 1:
-        raise CertificateError("hostname %r "
-            "doesn't match either of %s"
-            % (hostname, ', '.join(map(repr, dnsnames))))
-    elif len(dnsnames) == 1:
-        raise CertificateError("hostname %r "
-            "doesn't match %r"
-            % (hostname, dnsnames[0]))
-    else:
-        raise CertificateError("no appropriate commonName or "
-            "subjectAltName fields were found")
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/poolmanager.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/poolmanager.py
deleted file mode 100644
index fe5491c..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/poolmanager.py
+++ /dev/null
@@ -1,450 +0,0 @@
-from __future__ import absolute_import
-import collections
-import functools
-import logging
-
-from ._collections import RecentlyUsedContainer
-from .connectionpool import HTTPConnectionPool, HTTPSConnectionPool
-from .connectionpool import port_by_scheme
-from .exceptions import LocationValueError, MaxRetryError, ProxySchemeUnknown
-from .packages.six.moves.urllib.parse import urljoin
-from .request import RequestMethods
-from .util.url import parse_url
-from .util.retry import Retry
-
-
-__all__ = ['PoolManager', 'ProxyManager', 'proxy_from_url']
-
-
-log = logging.getLogger(__name__)
-
-SSL_KEYWORDS = ('key_file', 'cert_file', 'cert_reqs', 'ca_certs',
-                'ssl_version', 'ca_cert_dir', 'ssl_context')
-
-# All known keyword arguments that could be provided to the pool manager, its
-# pools, or the underlying connections. This is used to construct a pool key.
-_key_fields = (
-    'key_scheme',  # str
-    'key_host',  # str
-    'key_port',  # int
-    'key_timeout',  # int or float or Timeout
-    'key_retries',  # int or Retry
-    'key_strict',  # bool
-    'key_block',  # bool
-    'key_source_address',  # str
-    'key_key_file',  # str
-    'key_cert_file',  # str
-    'key_cert_reqs',  # str
-    'key_ca_certs',  # str
-    'key_ssl_version',  # str
-    'key_ca_cert_dir',  # str
-    'key_ssl_context',  # instance of ssl.SSLContext or urllib3.util.ssl_.SSLContext
-    'key_maxsize',  # int
-    'key_headers',  # dict
-    'key__proxy',  # parsed proxy url
-    'key__proxy_headers',  # dict
-    'key_socket_options',  # list of (level (int), optname (int), value (int or str)) tuples
-    'key__socks_options',  # dict
-    'key_assert_hostname',  # bool or string
-    'key_assert_fingerprint',  # str
-    'key_server_hostname', #str
-)
-
-#: The namedtuple class used to construct keys for the connection pool.
-#: All custom key schemes should include the fields in this key at a minimum.
-PoolKey = collections.namedtuple('PoolKey', _key_fields)
-
-
-def _default_key_normalizer(key_class, request_context):
-    """
-    Create a pool key out of a request context dictionary.
-
-    According to RFC 3986, both the scheme and host are case-insensitive.
-    Therefore, this function normalizes both before constructing the pool
-    key for an HTTPS request. If you wish to change this behaviour, provide
-    alternate callables to ``key_fn_by_scheme``.
-
-    :param key_class:
-        The class to use when constructing the key. This should be a namedtuple
-        with the ``scheme`` and ``host`` keys at a minimum.
-    :type  key_class: namedtuple
-    :param request_context:
-        A dictionary-like object that contain the context for a request.
-    :type  request_context: dict
-
-    :return: A namedtuple that can be used as a connection pool key.
-    :rtype:  PoolKey
-    """
-    # Since we mutate the dictionary, make a copy first
-    context = request_context.copy()
-    context['scheme'] = context['scheme'].lower()
-    context['host'] = context['host'].lower()
-
-    # These are both dictionaries and need to be transformed into frozensets
-    for key in ('headers', '_proxy_headers', '_socks_options'):
-        if key in context and context[key] is not None:
-            context[key] = frozenset(context[key].items())
-
-    # The socket_options key may be a list and needs to be transformed into a
-    # tuple.
-    socket_opts = context.get('socket_options')
-    if socket_opts is not None:
-        context['socket_options'] = tuple(socket_opts)
-
-    # Map the kwargs to the names in the namedtuple - this is necessary since
-    # namedtuples can't have fields starting with '_'.
-    for key in list(context.keys()):
-        context['key_' + key] = context.pop(key)
-
-    # Default to ``None`` for keys missing from the context
-    for field in key_class._fields:
-        if field not in context:
-            context[field] = None
-
-    return key_class(**context)
-
-
-#: A dictionary that maps a scheme to a callable that creates a pool key.
-#: This can be used to alter the way pool keys are constructed, if desired.
-#: Each PoolManager makes a copy of this dictionary so they can be configured
-#: globally here, or individually on the instance.
-key_fn_by_scheme = {
-    'http': functools.partial(_default_key_normalizer, PoolKey),
-    'https': functools.partial(_default_key_normalizer, PoolKey),
-}
-
-pool_classes_by_scheme = {
-    'http': HTTPConnectionPool,
-    'https': HTTPSConnectionPool,
-}
-
-
-class PoolManager(RequestMethods):
-    """
-    Allows for arbitrary requests while transparently keeping track of
-    necessary connection pools for you.
-
-    :param num_pools:
-        Number of connection pools to cache before discarding the least
-        recently used pool.
-
-    :param headers:
-        Headers to include with all requests, unless other headers are given
-        explicitly.
-
-    :param \\**connection_pool_kw:
-        Additional parameters are used to create fresh
-        :class:`urllib3.connectionpool.ConnectionPool` instances.
-
-    Example::
-
-        >>> manager = PoolManager(num_pools=2)
-        >>> r = manager.request('GET', 'http://google.com/')
-        >>> r = manager.request('GET', 'http://google.com/mail')
-        >>> r = manager.request('GET', 'http://yahoo.com/')
-        >>> len(manager.pools)
-        2
-
-    """
-
-    proxy = None
-
-    def __init__(self, num_pools=10, headers=None, **connection_pool_kw):
-        RequestMethods.__init__(self, headers)
-        self.connection_pool_kw = connection_pool_kw
-        self.pools = RecentlyUsedContainer(num_pools,
-                                           dispose_func=lambda p: p.close())
-
-        # Locally set the pool classes and keys so other PoolManagers can
-        # override them.
-        self.pool_classes_by_scheme = pool_classes_by_scheme
-        self.key_fn_by_scheme = key_fn_by_scheme.copy()
-
-    def __enter__(self):
-        return self
-
-    def __exit__(self, exc_type, exc_val, exc_tb):
-        self.clear()
-        # Return False to re-raise any potential exceptions
-        return False
-
-    def _new_pool(self, scheme, host, port, request_context=None):
-        """
-        Create a new :class:`ConnectionPool` based on host, port, scheme, and
-        any additional pool keyword arguments.
-
-        If ``request_context`` is provided, it is provided as keyword arguments
-        to the pool class used. This method is used to actually create the
-        connection pools handed out by :meth:`connection_from_url` and
-        companion methods. It is intended to be overridden for customization.
-        """
-        pool_cls = self.pool_classes_by_scheme[scheme]
-        if request_context is None:
-            request_context = self.connection_pool_kw.copy()
-
-        # Although the context has everything necessary to create the pool,
-        # this function has historically only used the scheme, host, and port
-        # in the positional args. When an API change is acceptable these can
-        # be removed.
-        for key in ('scheme', 'host', 'port'):
-            request_context.pop(key, None)
-
-        if scheme == 'http':
-            for kw in SSL_KEYWORDS:
-                request_context.pop(kw, None)
-
-        return pool_cls(host, port, **request_context)
-
-    def clear(self):
-        """
-        Empty our store of pools and direct them all to close.
-
-        This will not affect in-flight connections, but they will not be
-        re-used after completion.
-        """
-        self.pools.clear()
-
-    def connection_from_host(self, host, port=None, scheme='http', pool_kwargs=None):
-        """
-        Get a :class:`ConnectionPool` based on the host, port, and scheme.
-
-        If ``port`` isn't given, it will be derived from the ``scheme`` using
-        ``urllib3.connectionpool.port_by_scheme``. If ``pool_kwargs`` is
-        provided, it is merged with the instance's ``connection_pool_kw``
-        variable and used to create the new connection pool, if one is
-        needed.
-        """
-
-        if not host:
-            raise LocationValueError("No host specified.")
-
-        request_context = self._merge_pool_kwargs(pool_kwargs)
-        request_context['scheme'] = scheme or 'http'
-        if not port:
-            port = port_by_scheme.get(request_context['scheme'].lower(), 80)
-        request_context['port'] = port
-        request_context['host'] = host
-
-        return self.connection_from_context(request_context)
-
-    def connection_from_context(self, request_context):
-        """
-        Get a :class:`ConnectionPool` based on the request context.
-
-        ``request_context`` must at least contain the ``scheme`` key and its
-        value must be a key in ``key_fn_by_scheme`` instance variable.
-        """
-        scheme = request_context['scheme'].lower()
-        pool_key_constructor = self.key_fn_by_scheme[scheme]
-        pool_key = pool_key_constructor(request_context)
-
-        return self.connection_from_pool_key(pool_key, request_context=request_context)
-
-    def connection_from_pool_key(self, pool_key, request_context=None):
-        """
-        Get a :class:`ConnectionPool` based on the provided pool key.
-
-        ``pool_key`` should be a namedtuple that only contains immutable
-        objects. At a minimum it must have the ``scheme``, ``host``, and
-        ``port`` fields.
-        """
-        with self.pools.lock:
-            # If the scheme, host, or port doesn't match existing open
-            # connections, open a new ConnectionPool.
-            pool = self.pools.get(pool_key)
-            if pool:
-                return pool
-
-            # Make a fresh ConnectionPool of the desired type
-            scheme = request_context['scheme']
-            host = request_context['host']
-            port = request_context['port']
-            pool = self._new_pool(scheme, host, port, request_context=request_context)
-            self.pools[pool_key] = pool
-
-        return pool
-
-    def connection_from_url(self, url, pool_kwargs=None):
-        """
-        Similar to :func:`urllib3.connectionpool.connection_from_url`.
-
-        If ``pool_kwargs`` is not provided and a new pool needs to be
-        constructed, ``self.connection_pool_kw`` is used to initialize
-        the :class:`urllib3.connectionpool.ConnectionPool`. If ``pool_kwargs``
-        is provided, it is used instead. Note that if a new pool does not
-        need to be created for the request, the provided ``pool_kwargs`` are
-        not used.
-        """
-        u = parse_url(url)
-        return self.connection_from_host(u.host, port=u.port, scheme=u.scheme,
-                                         pool_kwargs=pool_kwargs)
-
-    def _merge_pool_kwargs(self, override):
-        """
-        Merge a dictionary of override values for self.connection_pool_kw.
-
-        This does not modify self.connection_pool_kw and returns a new dict.
-        Any keys in the override dictionary with a value of ``None`` are
-        removed from the merged dictionary.
-        """
-        base_pool_kwargs = self.connection_pool_kw.copy()
-        if override:
-            for key, value in override.items():
-                if value is None:
-                    try:
-                        del base_pool_kwargs[key]
-                    except KeyError:
-                        pass
-                else:
-                    base_pool_kwargs[key] = value
-        return base_pool_kwargs
-
-    def urlopen(self, method, url, redirect=True, **kw):
-        """
-        Same as :meth:`urllib3.connectionpool.HTTPConnectionPool.urlopen`
-        with custom cross-host redirect logic and only sends the request-uri
-        portion of the ``url``.
-
-        The given ``url`` parameter must be absolute, such that an appropriate
-        :class:`urllib3.connectionpool.ConnectionPool` can be chosen for it.
-        """
-        u = parse_url(url)
-        conn = self.connection_from_host(u.host, port=u.port, scheme=u.scheme)
-
-        kw['assert_same_host'] = False
-        kw['redirect'] = False
-
-        if 'headers' not in kw:
-            kw['headers'] = self.headers.copy()
-
-        if self.proxy is not None and u.scheme == "http":
-            response = conn.urlopen(method, url, **kw)
-        else:
-            response = conn.urlopen(method, u.request_uri, **kw)
-
-        redirect_location = redirect and response.get_redirect_location()
-        if not redirect_location:
-            return response
-
-        # Support relative URLs for redirecting.
-        redirect_location = urljoin(url, redirect_location)
-
-        # RFC 7231, Section 6.4.4
-        if response.status == 303:
-            method = 'GET'
-
-        retries = kw.get('retries')
-        if not isinstance(retries, Retry):
-            retries = Retry.from_int(retries, redirect=redirect)
-
-        # Strip headers marked as unsafe to forward to the redirected location.
-        # Check remove_headers_on_redirect to avoid a potential network call within
-        # conn.is_same_host() which may use socket.gethostbyname() in the future.
-        if (retries.remove_headers_on_redirect
-                and not conn.is_same_host(redirect_location)):
-            for header in retries.remove_headers_on_redirect:
-                kw['headers'].pop(header, None)
-
-        try:
-            retries = retries.increment(method, url, response=response, _pool=conn)
-        except MaxRetryError:
-            if retries.raise_on_redirect:
-                raise
-            return response
-
-        kw['retries'] = retries
-        kw['redirect'] = redirect
-
-        log.info("Redirecting %s -> %s", url, redirect_location)
-        return self.urlopen(method, redirect_location, **kw)
-
-
-class ProxyManager(PoolManager):
-    """
-    Behaves just like :class:`PoolManager`, but sends all requests through
-    the defined proxy, using the CONNECT method for HTTPS URLs.
-
-    :param proxy_url:
-        The URL of the proxy to be used.
-
-    :param proxy_headers:
-        A dictionary containing headers that will be sent to the proxy. In case
-        of HTTP they are being sent with each request, while in the
-        HTTPS/CONNECT case they are sent only once. Could be used for proxy
-        authentication.
-
-    Example:
-        >>> proxy = urllib3.ProxyManager('http://localhost:3128/')
-        >>> r1 = proxy.request('GET', 'http://google.com/')
-        >>> r2 = proxy.request('GET', 'http://httpbin.org/')
-        >>> len(proxy.pools)
-        1
-        >>> r3 = proxy.request('GET', 'https://httpbin.org/')
-        >>> r4 = proxy.request('GET', 'https://twitter.com/')
-        >>> len(proxy.pools)
-        3
-
-    """
-
-    def __init__(self, proxy_url, num_pools=10, headers=None,
-                 proxy_headers=None, **connection_pool_kw):
-
-        if isinstance(proxy_url, HTTPConnectionPool):
-            proxy_url = '%s://%s:%i' % (proxy_url.scheme, proxy_url.host,
-                                        proxy_url.port)
-        proxy = parse_url(proxy_url)
-        if not proxy.port:
-            port = port_by_scheme.get(proxy.scheme, 80)
-            proxy = proxy._replace(port=port)
-
-        if proxy.scheme not in ("http", "https"):
-            raise ProxySchemeUnknown(proxy.scheme)
-
-        self.proxy = proxy
-        self.proxy_headers = proxy_headers or {}
-
-        connection_pool_kw['_proxy'] = self.proxy
-        connection_pool_kw['_proxy_headers'] = self.proxy_headers
-
-        super(ProxyManager, self).__init__(
-            num_pools, headers, **connection_pool_kw)
-
-    def connection_from_host(self, host, port=None, scheme='http', pool_kwargs=None):
-        if scheme == "https":
-            return super(ProxyManager, self).connection_from_host(
-                host, port, scheme, pool_kwargs=pool_kwargs)
-
-        return super(ProxyManager, self).connection_from_host(
-            self.proxy.host, self.proxy.port, self.proxy.scheme, pool_kwargs=pool_kwargs)
-
-    def _set_proxy_headers(self, url, headers=None):
-        """
-        Sets headers needed by proxies: specifically, the Accept and Host
-        headers. Only sets headers not provided by the user.
-        """
-        headers_ = {'Accept': '*/*'}
-
-        netloc = parse_url(url).netloc
-        if netloc:
-            headers_['Host'] = netloc
-
-        if headers:
-            headers_.update(headers)
-        return headers_
-
-    def urlopen(self, method, url, redirect=True, **kw):
-        "Same as HTTP(S)ConnectionPool.urlopen, ``url`` must be absolute."
-        u = parse_url(url)
-
-        if u.scheme == "http":
-            # For proxied HTTPS requests, httplib sets the necessary headers
-            # on the CONNECT to the proxy. For HTTP, we'll definitely
-            # need to set 'Host' at the very least.
-            headers = kw.get('headers', self.headers)
-            kw['headers'] = self._set_proxy_headers(url, headers)
-
-        return super(ProxyManager, self).urlopen(method, url, redirect=redirect, **kw)
-
-
-def proxy_from_url(url, **kw):
-    return ProxyManager(proxy_url=url, **kw)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/request.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/request.py
deleted file mode 100644
index 8f2f44b..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/request.py
+++ /dev/null
@@ -1,150 +0,0 @@
-from __future__ import absolute_import
-
-from .filepost import encode_multipart_formdata
-from .packages.six.moves.urllib.parse import urlencode
-
-
-__all__ = ['RequestMethods']
-
-
-class RequestMethods(object):
-    """
-    Convenience mixin for classes who implement a :meth:`urlopen` method, such
-    as :class:`~urllib3.connectionpool.HTTPConnectionPool` and
-    :class:`~urllib3.poolmanager.PoolManager`.
-
-    Provides behavior for making common types of HTTP request methods and
-    decides which type of request field encoding to use.
-
-    Specifically,
-
-    :meth:`.request_encode_url` is for sending requests whose fields are
-    encoded in the URL (such as GET, HEAD, DELETE).
-
-    :meth:`.request_encode_body` is for sending requests whose fields are
-    encoded in the *body* of the request using multipart or www-form-urlencoded
-    (such as for POST, PUT, PATCH).
-
-    :meth:`.request` is for making any kind of request, it will look up the
-    appropriate encoding format and use one of the above two methods to make
-    the request.
-
-    Initializer parameters:
-
-    :param headers:
-        Headers to include with all requests, unless other headers are given
-        explicitly.
-    """
-
-    _encode_url_methods = {'DELETE', 'GET', 'HEAD', 'OPTIONS'}
-
-    def __init__(self, headers=None):
-        self.headers = headers or {}
-
-    def urlopen(self, method, url, body=None, headers=None,
-                encode_multipart=True, multipart_boundary=None,
-                **kw):  # Abstract
-        raise NotImplementedError("Classes extending RequestMethods must implement "
-                                  "their own ``urlopen`` method.")
-
-    def request(self, method, url, fields=None, headers=None, **urlopen_kw):
-        """
-        Make a request using :meth:`urlopen` with the appropriate encoding of
-        ``fields`` based on the ``method`` used.
-
-        This is a convenience method that requires the least amount of manual
-        effort. It can be used in most situations, while still having the
-        option to drop down to more specific methods when necessary, such as
-        :meth:`request_encode_url`, :meth:`request_encode_body`,
-        or even the lowest level :meth:`urlopen`.
-        """
-        method = method.upper()
-
-        urlopen_kw['request_url'] = url
-
-        if method in self._encode_url_methods:
-            return self.request_encode_url(method, url, fields=fields,
-                                           headers=headers,
-                                           **urlopen_kw)
-        else:
-            return self.request_encode_body(method, url, fields=fields,
-                                            headers=headers,
-                                            **urlopen_kw)
-
-    def request_encode_url(self, method, url, fields=None, headers=None,
-                           **urlopen_kw):
-        """
-        Make a request using :meth:`urlopen` with the ``fields`` encoded in
-        the url. This is useful for request methods like GET, HEAD, DELETE, etc.
-        """
-        if headers is None:
-            headers = self.headers
-
-        extra_kw = {'headers': headers}
-        extra_kw.update(urlopen_kw)
-
-        if fields:
-            url += '?' + urlencode(fields)
-
-        return self.urlopen(method, url, **extra_kw)
-
-    def request_encode_body(self, method, url, fields=None, headers=None,
-                            encode_multipart=True, multipart_boundary=None,
-                            **urlopen_kw):
-        """
-        Make a request using :meth:`urlopen` with the ``fields`` encoded in
-        the body. This is useful for request methods like POST, PUT, PATCH, etc.
-
-        When ``encode_multipart=True`` (default), then
-        :meth:`urllib3.filepost.encode_multipart_formdata` is used to encode
-        the payload with the appropriate content type. Otherwise
-        :meth:`urllib.urlencode` is used with the
-        'application/x-www-form-urlencoded' content type.
-
-        Multipart encoding must be used when posting files, and it's reasonably
-        safe to use it in other times too. However, it may break request
-        signing, such as with OAuth.
-
-        Supports an optional ``fields`` parameter of key/value strings AND
-        key/filetuple. A filetuple is a (filename, data, MIME type) tuple where
-        the MIME type is optional. For example::
-
-            fields = {
-                'foo': 'bar',
-                'fakefile': ('foofile.txt', 'contents of foofile'),
-                'realfile': ('barfile.txt', open('realfile').read()),
-                'typedfile': ('bazfile.bin', open('bazfile').read(),
-                              'image/jpeg'),
-                'nonamefile': 'contents of nonamefile field',
-            }
-
-        When uploading a file, providing a filename (the first parameter of the
-        tuple) is optional but recommended to best mimic behavior of browsers.
-
-        Note that if ``headers`` are supplied, the 'Content-Type' header will
-        be overwritten because it depends on the dynamic random boundary string
-        which is used to compose the body of the request. The random boundary
-        string can be explicitly set with the ``multipart_boundary`` parameter.
-        """
-        if headers is None:
-            headers = self.headers
-
-        extra_kw = {'headers': {}}
-
-        if fields:
-            if 'body' in urlopen_kw:
-                raise TypeError(
-                    "request got values for both 'fields' and 'body', can only specify one.")
-
-            if encode_multipart:
-                body, content_type = encode_multipart_formdata(fields, boundary=multipart_boundary)
-            else:
-                body, content_type = urlencode(fields), 'application/x-www-form-urlencoded'
-
-            extra_kw['body'] = body
-            extra_kw['headers'] = {'Content-Type': content_type}
-
-        extra_kw['headers'].update(headers)
-        extra_kw.update(urlopen_kw)
-
-        return self.urlopen(method, url, **extra_kw)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/response.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/response.py
deleted file mode 100644
index c112690..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/response.py
+++ /dev/null
@@ -1,705 +0,0 @@
-from __future__ import absolute_import
-from contextlib import contextmanager
-import zlib
-import io
-import logging
-from socket import timeout as SocketTimeout
-from socket import error as SocketError
-
-from ._collections import HTTPHeaderDict
-from .exceptions import (
-    BodyNotHttplibCompatible, ProtocolError, DecodeError, ReadTimeoutError,
-    ResponseNotChunked, IncompleteRead, InvalidHeader
-)
-from .packages.six import string_types as basestring, PY3
-from .packages.six.moves import http_client as httplib
-from .connection import HTTPException, BaseSSLError
-from .util.response import is_fp_closed, is_response_to_head
-
-log = logging.getLogger(__name__)
-
-
-class DeflateDecoder(object):
-
-    def __init__(self):
-        self._first_try = True
-        self._data = b''
-        self._obj = zlib.decompressobj()
-
-    def __getattr__(self, name):
-        return getattr(self._obj, name)
-
-    def decompress(self, data):
-        if not data:
-            return data
-
-        if not self._first_try:
-            return self._obj.decompress(data)
-
-        self._data += data
-        try:
-            decompressed = self._obj.decompress(data)
-            if decompressed:
-                self._first_try = False
-                self._data = None
-            return decompressed
-        except zlib.error:
-            self._first_try = False
-            self._obj = zlib.decompressobj(-zlib.MAX_WBITS)
-            try:
-                return self.decompress(self._data)
-            finally:
-                self._data = None
-
-
-class GzipDecoderState(object):
-
-    FIRST_MEMBER = 0
-    OTHER_MEMBERS = 1
-    SWALLOW_DATA = 2
-
-
-class GzipDecoder(object):
-
-    def __init__(self):
-        self._obj = zlib.decompressobj(16 + zlib.MAX_WBITS)
-        self._state = GzipDecoderState.FIRST_MEMBER
-
-    def __getattr__(self, name):
-        return getattr(self._obj, name)
-
-    def decompress(self, data):
-        ret = bytearray()
-        if self._state == GzipDecoderState.SWALLOW_DATA or not data:
-            return bytes(ret)
-        while True:
-            try:
-                ret += self._obj.decompress(data)
-            except zlib.error:
-                previous_state = self._state
-                # Ignore data after the first error
-                self._state = GzipDecoderState.SWALLOW_DATA
-                if previous_state == GzipDecoderState.OTHER_MEMBERS:
-                    # Allow trailing garbage acceptable in other gzip clients
-                    return bytes(ret)
-                raise
-            data = self._obj.unused_data
-            if not data:
-                return bytes(ret)
-            self._state = GzipDecoderState.OTHER_MEMBERS
-            self._obj = zlib.decompressobj(16 + zlib.MAX_WBITS)
-
-
-class MultiDecoder(object):
-    """
-    From RFC7231:
-        If one or more encodings have been applied to a representation, the
-        sender that applied the encodings MUST generate a Content-Encoding
-        header field that lists the content codings in the order in which
-        they were applied.
-    """
-
-    def __init__(self, modes):
-        self._decoders = [_get_decoder(m.strip()) for m in modes.split(',')]
-
-    def flush(self):
-        return self._decoders[0].flush()
-
-    def decompress(self, data):
-        for d in reversed(self._decoders):
-            data = d.decompress(data)
-        return data
-
-
-def _get_decoder(mode):
-    if ',' in mode:
-        return MultiDecoder(mode)
-
-    if mode == 'gzip':
-        return GzipDecoder()
-
-    return DeflateDecoder()
-
-
-class HTTPResponse(io.IOBase):
-    """
-    HTTP Response container.
-
-    Backwards-compatible to httplib's HTTPResponse but the response ``body`` is
-    loaded and decoded on-demand when the ``data`` property is accessed.  This
-    class is also compatible with the Python standard library's :mod:`io`
-    module, and can hence be treated as a readable object in the context of that
-    framework.
-
-    Extra parameters for behaviour not present in httplib.HTTPResponse:
-
-    :param preload_content:
-        If True, the response's body will be preloaded during construction.
-
-    :param decode_content:
-        If True, will attempt to decode the body based on the
-        'content-encoding' header.
-
-    :param original_response:
-        When this HTTPResponse wrapper is generated from an httplib.HTTPResponse
-        object, it's convenient to include the original for debug purposes. It's
-        otherwise unused.
-
-    :param retries:
-        The retries contains the last :class:`~urllib3.util.retry.Retry` that
-        was used during the request.
-
-    :param enforce_content_length:
-        Enforce content length checking. Body returned by server must match
-        value of Content-Length header, if present. Otherwise, raise error.
-    """
-
-    CONTENT_DECODERS = ['gzip', 'deflate']
-    REDIRECT_STATUSES = [301, 302, 303, 307, 308]
-
-    def __init__(self, body='', headers=None, status=0, version=0, reason=None,
-                 strict=0, preload_content=True, decode_content=True,
-                 original_response=None, pool=None, connection=None, msg=None,
-                 retries=None, enforce_content_length=False,
-                 request_method=None, request_url=None):
-
-        if isinstance(headers, HTTPHeaderDict):
-            self.headers = headers
-        else:
-            self.headers = HTTPHeaderDict(headers)
-        self.status = status
-        self.version = version
-        self.reason = reason
-        self.strict = strict
-        self.decode_content = decode_content
-        self.retries = retries
-        self.enforce_content_length = enforce_content_length
-
-        self._decoder = None
-        self._body = None
-        self._fp = None
-        self._original_response = original_response
-        self._fp_bytes_read = 0
-        self.msg = msg
-        self._request_url = request_url
-
-        if body and isinstance(body, (basestring, bytes)):
-            self._body = body
-
-        self._pool = pool
-        self._connection = connection
-
-        if hasattr(body, 'read'):
-            self._fp = body
-
-        # Are we using the chunked-style of transfer encoding?
-        self.chunked = False
-        self.chunk_left = None
-        tr_enc = self.headers.get('transfer-encoding', '').lower()
-        # Don't incur the penalty of creating a list and then discarding it
-        encodings = (enc.strip() for enc in tr_enc.split(","))
-        if "chunked" in encodings:
-            self.chunked = True
-
-        # Determine length of response
-        self.length_remaining = self._init_length(request_method)
-
-        # If requested, preload the body.
-        if preload_content and not self._body:
-            self._body = self.read(decode_content=decode_content)
-
-    def get_redirect_location(self):
-        """
-        Should we redirect and where to?
-
-        :returns: Truthy redirect location string if we got a redirect status
-            code and valid location. ``None`` if redirect status and no
-            location. ``False`` if not a redirect status code.
-        """
-        if self.status in self.REDIRECT_STATUSES:
-            return self.headers.get('location')
-
-        return False
-
-    def release_conn(self):
-        if not self._pool or not self._connection:
-            return
-
-        self._pool._put_conn(self._connection)
-        self._connection = None
-
-    @property
-    def data(self):
-        # For backwords-compat with earlier urllib3 0.4 and earlier.
-        if self._body:
-            return self._body
-
-        if self._fp:
-            return self.read(cache_content=True)
-
-    @property
-    def connection(self):
-        return self._connection
-
-    def isclosed(self):
-        return is_fp_closed(self._fp)
-
-    def tell(self):
-        """
-        Obtain the number of bytes pulled over the wire so far. May differ from
-        the amount of content returned by :meth:``HTTPResponse.read`` if bytes
-        are encoded on the wire (e.g, compressed).
-        """
-        return self._fp_bytes_read
-
-    def _init_length(self, request_method):
-        """
-        Set initial length value for Response content if available.
-        """
-        length = self.headers.get('content-length')
-
-        if length is not None:
-            if self.chunked:
-                # This Response will fail with an IncompleteRead if it can't be
-                # received as chunked. This method falls back to attempt reading
-                # the response before raising an exception.
-                log.warning("Received response with both Content-Length and "
-                            "Transfer-Encoding set. This is expressly forbidden "
-                            "by RFC 7230 sec 3.3.2. Ignoring Content-Length and "
-                            "attempting to process response as Transfer-Encoding: "
-                            "chunked.")
-                return None
-
-            try:
-                # RFC 7230 section 3.3.2 specifies multiple content lengths can
-                # be sent in a single Content-Length header
-                # (e.g. Content-Length: 42, 42). This line ensures the values
-                # are all valid ints and that as long as the `set` length is 1,
-                # all values are the same. Otherwise, the header is invalid.
-                lengths = set([int(val) for val in length.split(',')])
-                if len(lengths) > 1:
-                    raise InvalidHeader("Content-Length contained multiple "
-                                        "unmatching values (%s)" % length)
-                length = lengths.pop()
-            except ValueError:
-                length = None
-            else:
-                if length < 0:
-                    length = None
-
-        # Convert status to int for comparison
-        # In some cases, httplib returns a status of "_UNKNOWN"
-        try:
-            status = int(self.status)
-        except ValueError:
-            status = 0
-
-        # Check for responses that shouldn't include a body
-        if status in (204, 304) or 100 <= status < 200 or request_method == 'HEAD':
-            length = 0
-
-        return length
-
-    def _init_decoder(self):
-        """
-        Set-up the _decoder attribute if necessary.
-        """
-        # Note: content-encoding value should be case-insensitive, per RFC 7230
-        # Section 3.2
-        content_encoding = self.headers.get('content-encoding', '').lower()
-        if self._decoder is None:
-            if content_encoding in self.CONTENT_DECODERS:
-                self._decoder = _get_decoder(content_encoding)
-            elif ',' in content_encoding:
-                encodings = [e.strip() for e in content_encoding.split(',') if e.strip() in self.CONTENT_DECODERS]
-                if len(encodings):
-                    self._decoder = _get_decoder(content_encoding)
-
-    def _decode(self, data, decode_content, flush_decoder):
-        """
-        Decode the data passed in and potentially flush the decoder.
-        """
-        try:
-            if decode_content and self._decoder:
-                data = self._decoder.decompress(data)
-        except (IOError, zlib.error) as e:
-            content_encoding = self.headers.get('content-encoding', '').lower()
-            raise DecodeError(
-                "Received response with content-encoding: %s, but "
-                "failed to decode it." % content_encoding, e)
-
-        if flush_decoder and decode_content:
-            data += self._flush_decoder()
-
-        return data
-
-    def _flush_decoder(self):
-        """
-        Flushes the decoder. Should only be called if the decoder is actually
-        being used.
-        """
-        if self._decoder:
-            buf = self._decoder.decompress(b'')
-            return buf + self._decoder.flush()
-
-        return b''
-
-    @contextmanager
-    def _error_catcher(self):
-        """
-        Catch low-level python exceptions, instead re-raising urllib3
-        variants, so that low-level exceptions are not leaked in the
-        high-level api.
-
-        On exit, release the connection back to the pool.
-        """
-        clean_exit = False
-
-        try:
-            try:
-                yield
-
-            except SocketTimeout:
-                # FIXME: Ideally we'd like to include the url in the ReadTimeoutError but
-                # there is yet no clean way to get at it from this context.
-                raise ReadTimeoutError(self._pool, None, 'Read timed out.')
-
-            except BaseSSLError as e:
-                # FIXME: Is there a better way to differentiate between SSLErrors?
-                if 'read operation timed out' not in str(e):  # Defensive:
-                    # This shouldn't happen but just in case we're missing an edge
-                    # case, let's avoid swallowing SSL errors.
-                    raise
-
-                raise ReadTimeoutError(self._pool, None, 'Read timed out.')
-
-            except (HTTPException, SocketError) as e:
-                # This includes IncompleteRead.
-                raise ProtocolError('Connection broken: %r' % e, e)
-
-            # If no exception is thrown, we should avoid cleaning up
-            # unnecessarily.
-            clean_exit = True
-        finally:
-            # If we didn't terminate cleanly, we need to throw away our
-            # connection.
-            if not clean_exit:
-                # The response may not be closed but we're not going to use it
-                # anymore so close it now to ensure that the connection is
-                # released back to the pool.
-                if self._original_response:
-                    self._original_response.close()
-
-                # Closing the response may not actually be sufficient to close
-                # everything, so if we have a hold of the connection close that
-                # too.
-                if self._connection:
-                    self._connection.close()
-
-            # If we hold the original response but it's closed now, we should
-            # return the connection back to the pool.
-            if self._original_response and self._original_response.isclosed():
-                self.release_conn()
-
-    def read(self, amt=None, decode_content=None, cache_content=False):
-        """
-        Similar to :meth:`httplib.HTTPResponse.read`, but with two additional
-        parameters: ``decode_content`` and ``cache_content``.
-
-        :param amt:
-            How much of the content to read. If specified, caching is skipped
-            because it doesn't make sense to cache partial content as the full
-            response.
-
-        :param decode_content:
-            If True, will attempt to decode the body based on the
-            'content-encoding' header.
-
-        :param cache_content:
-            If True, will save the returned data such that the same result is
-            returned despite of the state of the underlying file object. This
-            is useful if you want the ``.data`` property to continue working
-            after having ``.read()`` the file object. (Overridden if ``amt`` is
-            set.)
-        """
-        self._init_decoder()
-        if decode_content is None:
-            decode_content = self.decode_content
-
-        if self._fp is None:
-            return
-
-        flush_decoder = False
-        data = None
-
-        with self._error_catcher():
-            if amt is None:
-                # cStringIO doesn't like amt=None
-                data = self._fp.read()
-                flush_decoder = True
-            else:
-                cache_content = False
-                data = self._fp.read(amt)
-                if amt != 0 and not data:  # Platform-specific: Buggy versions of Python.
-                    # Close the connection when no data is returned
-                    #
-                    # This is redundant to what httplib/http.client _should_
-                    # already do.  However, versions of python released before
-                    # December 15, 2012 (http://bugs.python.org/issue16298) do
-                    # not properly close the connection in all cases. There is
-                    # no harm in redundantly calling close.
-                    self._fp.close()
-                    flush_decoder = True
-                    if self.enforce_content_length and self.length_remaining not in (0, None):
-                        # This is an edge case that httplib failed to cover due
-                        # to concerns of backward compatibility. We're
-                        # addressing it here to make sure IncompleteRead is
-                        # raised during streaming, so all calls with incorrect
-                        # Content-Length are caught.
-                        raise IncompleteRead(self._fp_bytes_read, self.length_remaining)
-
-        if data:
-            self._fp_bytes_read += len(data)
-            if self.length_remaining is not None:
-                self.length_remaining -= len(data)
-
-            data = self._decode(data, decode_content, flush_decoder)
-
-            if cache_content:
-                self._body = data
-
-        return data
-
-    def stream(self, amt=2**16, decode_content=None):
-        """
-        A generator wrapper for the read() method. A call will block until
-        ``amt`` bytes have been read from the connection or until the
-        connection is closed.
-
-        :param amt:
-            How much of the content to read. The generator will return up to
-            much data per iteration, but may return less. This is particularly
-            likely when using compressed data. However, the empty string will
-            never be returned.
-
-        :param decode_content:
-            If True, will attempt to decode the body based on the
-            'content-encoding' header.
-        """
-        if self.chunked and self.supports_chunked_reads():
-            for line in self.read_chunked(amt, decode_content=decode_content):
-                yield line
-        else:
-            while not is_fp_closed(self._fp):
-                data = self.read(amt=amt, decode_content=decode_content)
-
-                if data:
-                    yield data
-
-    @classmethod
-    def from_httplib(ResponseCls, r, **response_kw):
-        """
-        Given an :class:`httplib.HTTPResponse` instance ``r``, return a
-        corresponding :class:`urllib3.response.HTTPResponse` object.
-
-        Remaining parameters are passed to the HTTPResponse constructor, along
-        with ``original_response=r``.
-        """
-        headers = r.msg
-
-        if not isinstance(headers, HTTPHeaderDict):
-            if PY3:  # Python 3
-                headers = HTTPHeaderDict(headers.items())
-            else:  # Python 2
-                headers = HTTPHeaderDict.from_httplib(headers)
-
-        # HTTPResponse objects in Python 3 don't have a .strict attribute
-        strict = getattr(r, 'strict', 0)
-        resp = ResponseCls(body=r,
-                           headers=headers,
-                           status=r.status,
-                           version=r.version,
-                           reason=r.reason,
-                           strict=strict,
-                           original_response=r,
-                           **response_kw)
-        return resp
-
-    # Backwards-compatibility methods for httplib.HTTPResponse
-    def getheaders(self):
-        return self.headers
-
-    def getheader(self, name, default=None):
-        return self.headers.get(name, default)
-
-    # Backwards compatibility for http.cookiejar
-    def info(self):
-        return self.headers
-
-    # Overrides from io.IOBase
-    def close(self):
-        if not self.closed:
-            self._fp.close()
-
-        if self._connection:
-            self._connection.close()
-
-    @property
-    def closed(self):
-        if self._fp is None:
-            return True
-        elif hasattr(self._fp, 'isclosed'):
-            return self._fp.isclosed()
-        elif hasattr(self._fp, 'closed'):
-            return self._fp.closed
-        else:
-            return True
-
-    def fileno(self):
-        if self._fp is None:
-            raise IOError("HTTPResponse has no file to get a fileno from")
-        elif hasattr(self._fp, "fileno"):
-            return self._fp.fileno()
-        else:
-            raise IOError("The file-like object this HTTPResponse is wrapped "
-                          "around has no file descriptor")
-
-    def flush(self):
-        if self._fp is not None and hasattr(self._fp, 'flush'):
-            return self._fp.flush()
-
-    def readable(self):
-        # This method is required for `io` module compatibility.
-        return True
-
-    def readinto(self, b):
-        # This method is required for `io` module compatibility.
-        temp = self.read(len(b))
-        if len(temp) == 0:
-            return 0
-        else:
-            b[:len(temp)] = temp
-            return len(temp)
-
-    def supports_chunked_reads(self):
-        """
-        Checks if the underlying file-like object looks like a
-        httplib.HTTPResponse object. We do this by testing for the fp
-        attribute. If it is present we assume it returns raw chunks as
-        processed by read_chunked().
-        """
-        return hasattr(self._fp, 'fp')
-
-    def _update_chunk_length(self):
-        # First, we'll figure out length of a chunk and then
-        # we'll try to read it from socket.
-        if self.chunk_left is not None:
-            return
-        line = self._fp.fp.readline()
-        line = line.split(b';', 1)[0]
-        try:
-            self.chunk_left = int(line, 16)
-        except ValueError:
-            # Invalid chunked protocol response, abort.
-            self.close()
-            raise httplib.IncompleteRead(line)
-
-    def _handle_chunk(self, amt):
-        returned_chunk = None
-        if amt is None:
-            chunk = self._fp._safe_read(self.chunk_left)
-            returned_chunk = chunk
-            self._fp._safe_read(2)  # Toss the CRLF at the end of the chunk.
-            self.chunk_left = None
-        elif amt < self.chunk_left:
-            value = self._fp._safe_read(amt)
-            self.chunk_left = self.chunk_left - amt
-            returned_chunk = value
-        elif amt == self.chunk_left:
-            value = self._fp._safe_read(amt)
-            self._fp._safe_read(2)  # Toss the CRLF at the end of the chunk.
-            self.chunk_left = None
-            returned_chunk = value
-        else:  # amt > self.chunk_left
-            returned_chunk = self._fp._safe_read(self.chunk_left)
-            self._fp._safe_read(2)  # Toss the CRLF at the end of the chunk.
-            self.chunk_left = None
-        return returned_chunk
-
-    def read_chunked(self, amt=None, decode_content=None):
-        """
-        Similar to :meth:`HTTPResponse.read`, but with an additional
-        parameter: ``decode_content``.
-
-        :param amt:
-            How much of the content to read. If specified, caching is skipped
-            because it doesn't make sense to cache partial content as the full
-            response.
-
-        :param decode_content:
-            If True, will attempt to decode the body based on the
-            'content-encoding' header.
-        """
-        self._init_decoder()
-        # FIXME: Rewrite this method and make it a class with a better structured logic.
-        if not self.chunked:
-            raise ResponseNotChunked(
-                "Response is not chunked. "
-                "Header 'transfer-encoding: chunked' is missing.")
-        if not self.supports_chunked_reads():
-            raise BodyNotHttplibCompatible(
-                "Body should be httplib.HTTPResponse like. "
-                "It should have have an fp attribute which returns raw chunks.")
-
-        with self._error_catcher():
-            # Don't bother reading the body of a HEAD request.
-            if self._original_response and is_response_to_head(self._original_response):
-                self._original_response.close()
-                return
-
-            # If a response is already read and closed
-            # then return immediately.
-            if self._fp.fp is None:
-                return
-
-            while True:
-                self._update_chunk_length()
-                if self.chunk_left == 0:
-                    break
-                chunk = self._handle_chunk(amt)
-                decoded = self._decode(chunk, decode_content=decode_content,
-                                       flush_decoder=False)
-                if decoded:
-                    yield decoded
-
-            if decode_content:
-                # On CPython and PyPy, we should never need to flush the
-                # decoder. However, on Jython we *might* need to, so
-                # lets defensively do it anyway.
-                decoded = self._flush_decoder()
-                if decoded:  # Platform-specific: Jython.
-                    yield decoded
-
-            # Chunk content ends with \r\n: discard it.
-            while True:
-                line = self._fp.fp.readline()
-                if not line:
-                    # Some sites may not end with '\r\n'.
-                    break
-                if line == b'\r\n':
-                    break
-
-            # We read everything; close the "file".
-            if self._original_response:
-                self._original_response.close()
-
-    def geturl(self):
-        """
-        Returns the URL that was the source of this response.
-        If the request that generated this response redirected, this method
-        will return the final redirect location.
-        """
-        if self.retries is not None and len(self.retries.history):
-            return self.retries.history[-1].redirect_location
-        else:
-            return self._request_url
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/__init__.py
deleted file mode 100644
index 2f2770b..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/__init__.py
+++ /dev/null
@@ -1,54 +0,0 @@
-from __future__ import absolute_import
-# For backwards compatibility, provide imports that used to be here.
-from .connection import is_connection_dropped
-from .request import make_headers
-from .response import is_fp_closed
-from .ssl_ import (
-    SSLContext,
-    HAS_SNI,
-    IS_PYOPENSSL,
-    IS_SECURETRANSPORT,
-    assert_fingerprint,
-    resolve_cert_reqs,
-    resolve_ssl_version,
-    ssl_wrap_socket,
-)
-from .timeout import (
-    current_time,
-    Timeout,
-)
-
-from .retry import Retry
-from .url import (
-    get_host,
-    parse_url,
-    split_first,
-    Url,
-)
-from .wait import (
-    wait_for_read,
-    wait_for_write
-)
-
-__all__ = (
-    'HAS_SNI',
-    'IS_PYOPENSSL',
-    'IS_SECURETRANSPORT',
-    'SSLContext',
-    'Retry',
-    'Timeout',
-    'Url',
-    'assert_fingerprint',
-    'current_time',
-    'is_connection_dropped',
-    'is_fp_closed',
-    'get_host',
-    'parse_url',
-    'make_headers',
-    'resolve_cert_reqs',
-    'resolve_ssl_version',
-    'split_first',
-    'ssl_wrap_socket',
-    'wait_for_read',
-    'wait_for_write'
-)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/connection.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/connection.py
deleted file mode 100644
index 5ad70b2..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/connection.py
+++ /dev/null
@@ -1,134 +0,0 @@
-from __future__ import absolute_import
-import socket
-from .wait import NoWayToWaitForSocketError, wait_for_read
-from ..contrib import _appengine_environ
-
-
-def is_connection_dropped(conn):  # Platform-specific
-    """
-    Returns True if the connection is dropped and should be closed.
-
-    :param conn:
-        :class:`httplib.HTTPConnection` object.
-
-    Note: For platforms like AppEngine, this will always return ``False`` to
-    let the platform handle connection recycling transparently for us.
-    """
-    sock = getattr(conn, 'sock', False)
-    if sock is False:  # Platform-specific: AppEngine
-        return False
-    if sock is None:  # Connection already closed (such as by httplib).
-        return True
-    try:
-        # Returns True if readable, which here means it's been dropped
-        return wait_for_read(sock, timeout=0.0)
-    except NoWayToWaitForSocketError:  # Platform-specific: AppEngine
-        return False
-
-
-# This function is copied from socket.py in the Python 2.7 standard
-# library test suite. Added to its signature is only `socket_options`.
-# One additional modification is that we avoid binding to IPv6 servers
-# discovered in DNS if the system doesn't have IPv6 functionality.
-def create_connection(address, timeout=socket._GLOBAL_DEFAULT_TIMEOUT,
-                      source_address=None, socket_options=None):
-    """Connect to *address* and return the socket object.
-
-    Convenience function.  Connect to *address* (a 2-tuple ``(host,
-    port)``) and return the socket object.  Passing the optional
-    *timeout* parameter will set the timeout on the socket instance
-    before attempting to connect.  If no *timeout* is supplied, the
-    global default timeout setting returned by :func:`getdefaulttimeout`
-    is used.  If *source_address* is set it must be a tuple of (host, port)
-    for the socket to bind as a source address before making the connection.
-    An host of '' or port 0 tells the OS to use the default.
-    """
-
-    host, port = address
-    if host.startswith('['):
-        host = host.strip('[]')
-    err = None
-
-    # Using the value from allowed_gai_family() in the context of getaddrinfo lets
-    # us select whether to work with IPv4 DNS records, IPv6 records, or both.
-    # The original create_connection function always returns all records.
-    family = allowed_gai_family()
-
-    for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM):
-        af, socktype, proto, canonname, sa = res
-        sock = None
-        try:
-            sock = socket.socket(af, socktype, proto)
-
-            # If provided, set socket level options before connecting.
-            _set_socket_options(sock, socket_options)
-
-            if timeout is not socket._GLOBAL_DEFAULT_TIMEOUT:
-                sock.settimeout(timeout)
-            if source_address:
-                sock.bind(source_address)
-            sock.connect(sa)
-            return sock
-
-        except socket.error as e:
-            err = e
-            if sock is not None:
-                sock.close()
-                sock = None
-
-    if err is not None:
-        raise err
-
-    raise socket.error("getaddrinfo returns an empty list")
-
-
-def _set_socket_options(sock, options):
-    if options is None:
-        return
-
-    for opt in options:
-        sock.setsockopt(*opt)
-
-
-def allowed_gai_family():
-    """This function is designed to work in the context of
-    getaddrinfo, where family=socket.AF_UNSPEC is the default and
-    will perform a DNS search for both IPv6 and IPv4 records."""
-
-    family = socket.AF_INET
-    if HAS_IPV6:
-        family = socket.AF_UNSPEC
-    return family
-
-
-def _has_ipv6(host):
-    """ Returns True if the system can bind an IPv6 address. """
-    sock = None
-    has_ipv6 = False
-
-    # App Engine doesn't support IPV6 sockets and actually has a quota on the
-    # number of sockets that can be used, so just early out here instead of
-    # creating a socket needlessly.
-    # See https://github.com/urllib3/urllib3/issues/1446
-    if _appengine_environ.is_appengine_sandbox():
-        return False
-
-    if socket.has_ipv6:
-        # has_ipv6 returns true if cPython was compiled with IPv6 support.
-        # It does not tell us if the system has IPv6 support enabled. To
-        # determine that we must bind to an IPv6 address.
-        # https://github.com/shazow/urllib3/pull/611
-        # https://bugs.python.org/issue658327
-        try:
-            sock = socket.socket(socket.AF_INET6)
-            sock.bind((host, 0))
-            has_ipv6 = True
-        except Exception:
-            pass
-
-    if sock:
-        sock.close()
-    return has_ipv6
-
-
-HAS_IPV6 = _has_ipv6('::1')
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/queue.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/queue.py
deleted file mode 100644
index d3d379a..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/queue.py
+++ /dev/null
@@ -1,21 +0,0 @@
-import collections
-from ..packages import six
-from ..packages.six.moves import queue
-
-if six.PY2:
-    # Queue is imported for side effects on MS Windows. See issue #229.
-    import Queue as _unused_module_Queue  # noqa: F401
-
-
-class LifoQueue(queue.Queue):
-    def _init(self, _):
-        self.queue = collections.deque()
-
-    def _qsize(self, len=len):
-        return len(self.queue)
-
-    def _put(self, item):
-        self.queue.append(item)
-
-    def _get(self):
-        return self.queue.pop()
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/request.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/request.py
deleted file mode 100644
index 3ddfcd5..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/request.py
+++ /dev/null
@@ -1,118 +0,0 @@
-from __future__ import absolute_import
-from base64 import b64encode
-
-from ..packages.six import b, integer_types
-from ..exceptions import UnrewindableBodyError
-
-ACCEPT_ENCODING = 'gzip,deflate'
-_FAILEDTELL = object()
-
-
-def make_headers(keep_alive=None, accept_encoding=None, user_agent=None,
-                 basic_auth=None, proxy_basic_auth=None, disable_cache=None):
-    """
-    Shortcuts for generating request headers.
-
-    :param keep_alive:
-        If ``True``, adds 'connection: keep-alive' header.
-
-    :param accept_encoding:
-        Can be a boolean, list, or string.
-        ``True`` translates to 'gzip,deflate'.
-        List will get joined by comma.
-        String will be used as provided.
-
-    :param user_agent:
-        String representing the user-agent you want, such as
-        "python-urllib3/0.6"
-
-    :param basic_auth:
-        Colon-separated username:password string for 'authorization: basic ...'
-        auth header.
-
-    :param proxy_basic_auth:
-        Colon-separated username:password string for 'proxy-authorization: basic ...'
-        auth header.
-
-    :param disable_cache:
-        If ``True``, adds 'cache-control: no-cache' header.
-
-    Example::
-
-        >>> make_headers(keep_alive=True, user_agent="Batman/1.0")
-        {'connection': 'keep-alive', 'user-agent': 'Batman/1.0'}
-        >>> make_headers(accept_encoding=True)
-        {'accept-encoding': 'gzip,deflate'}
-    """
-    headers = {}
-    if accept_encoding:
-        if isinstance(accept_encoding, str):
-            pass
-        elif isinstance(accept_encoding, list):
-            accept_encoding = ','.join(accept_encoding)
-        else:
-            accept_encoding = ACCEPT_ENCODING
-        headers['accept-encoding'] = accept_encoding
-
-    if user_agent:
-        headers['user-agent'] = user_agent
-
-    if keep_alive:
-        headers['connection'] = 'keep-alive'
-
-    if basic_auth:
-        headers['authorization'] = 'Basic ' + \
-            b64encode(b(basic_auth)).decode('utf-8')
-
-    if proxy_basic_auth:
-        headers['proxy-authorization'] = 'Basic ' + \
-            b64encode(b(proxy_basic_auth)).decode('utf-8')
-
-    if disable_cache:
-        headers['cache-control'] = 'no-cache'
-
-    return headers
-
-
-def set_file_position(body, pos):
-    """
-    If a position is provided, move file to that point.
-    Otherwise, we'll attempt to record a position for future use.
-    """
-    if pos is not None:
-        rewind_body(body, pos)
-    elif getattr(body, 'tell', None) is not None:
-        try:
-            pos = body.tell()
-        except (IOError, OSError):
-            # This differentiates from None, allowing us to catch
-            # a failed `tell()` later when trying to rewind the body.
-            pos = _FAILEDTELL
-
-    return pos
-
-
-def rewind_body(body, body_pos):
-    """
-    Attempt to rewind body to a certain position.
-    Primarily used for request redirects and retries.
-
-    :param body:
-        File-like object that supports seek.
-
-    :param int pos:
-        Position to seek to in file.
-    """
-    body_seek = getattr(body, 'seek', None)
-    if body_seek is not None and isinstance(body_pos, integer_types):
-        try:
-            body_seek(body_pos)
-        except (IOError, OSError):
-            raise UnrewindableBodyError("An error occurred when rewinding request "
-                                        "body for redirect/retry.")
-    elif body_pos is _FAILEDTELL:
-        raise UnrewindableBodyError("Unable to record file position for rewinding "
-                                    "request body during a redirect/retry.")
-    else:
-        raise ValueError("body_pos must be of type integer, "
-                         "instead it was %s." % type(body_pos))
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/response.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/response.py
deleted file mode 100644
index 3d54864..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/response.py
+++ /dev/null
@@ -1,87 +0,0 @@
-from __future__ import absolute_import
-from ..packages.six.moves import http_client as httplib
-
-from ..exceptions import HeaderParsingError
-
-
-def is_fp_closed(obj):
-    """
-    Checks whether a given file-like object is closed.
-
-    :param obj:
-        The file-like object to check.
-    """
-
-    try:
-        # Check `isclosed()` first, in case Python3 doesn't set `closed`.
-        # GH Issue #928
-        return obj.isclosed()
-    except AttributeError:
-        pass
-
-    try:
-        # Check via the official file-like-object way.
-        return obj.closed
-    except AttributeError:
-        pass
-
-    try:
-        # Check if the object is a container for another file-like object that
-        # gets released on exhaustion (e.g. HTTPResponse).
-        return obj.fp is None
-    except AttributeError:
-        pass
-
-    raise ValueError("Unable to determine whether fp is closed.")
-
-
-def assert_header_parsing(headers):
-    """
-    Asserts whether all headers have been successfully parsed.
-    Extracts encountered errors from the result of parsing headers.
-
-    Only works on Python 3.
-
-    :param headers: Headers to verify.
-    :type headers: `httplib.HTTPMessage`.
-
-    :raises urllib3.exceptions.HeaderParsingError:
-        If parsing errors are found.
-    """
-
-    # This will fail silently if we pass in the wrong kind of parameter.
-    # To make debugging easier add an explicit check.
-    if not isinstance(headers, httplib.HTTPMessage):
-        raise TypeError('expected httplib.Message, got {0}.'.format(
-            type(headers)))
-
-    defects = getattr(headers, 'defects', None)
-    get_payload = getattr(headers, 'get_payload', None)
-
-    unparsed_data = None
-    if get_payload:
-        # get_payload is actually email.message.Message.get_payload;
-        # we're only interested in the result if it's not a multipart message
-        if not headers.is_multipart():
-            payload = get_payload()
-
-            if isinstance(payload, (bytes, str)):
-                unparsed_data = payload
-
-    if defects or unparsed_data:
-        raise HeaderParsingError(defects=defects, unparsed_data=unparsed_data)
-
-
-def is_response_to_head(response):
-    """
-    Checks whether the request of a response has been a HEAD-request.
-    Handles the quirks of AppEngine.
-
-    :param conn:
-    :type conn: :class:`httplib.HTTPResponse`
-    """
-    # FIXME: Can we do this somehow without accessing private httplib _method?
-    method = response._method
-    if isinstance(method, int):  # Platform-specific: Appengine
-        return method == 3
-    return method.upper() == 'HEAD'
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/retry.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/retry.py
deleted file mode 100644
index e7d0abd..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/retry.py
+++ /dev/null
@@ -1,411 +0,0 @@
-from __future__ import absolute_import
-import time
-import logging
-from collections import namedtuple
-from itertools import takewhile
-import email
-import re
-
-from ..exceptions import (
-    ConnectTimeoutError,
-    MaxRetryError,
-    ProtocolError,
-    ReadTimeoutError,
-    ResponseError,
-    InvalidHeader,
-)
-from ..packages import six
-
-
-log = logging.getLogger(__name__)
-
-
-# Data structure for representing the metadata of requests that result in a retry.
-RequestHistory = namedtuple('RequestHistory', ["method", "url", "error",
-                                               "status", "redirect_location"])
-
-
-class Retry(object):
-    """ Retry configuration.
-
-    Each retry attempt will create a new Retry object with updated values, so
-    they can be safely reused.
-
-    Retries can be defined as a default for a pool::
-
-        retries = Retry(connect=5, read=2, redirect=5)
-        http = PoolManager(retries=retries)
-        response = http.request('GET', 'http://example.com/')
-
-    Or per-request (which overrides the default for the pool)::
-
-        response = http.request('GET', 'http://example.com/', retries=Retry(10))
-
-    Retries can be disabled by passing ``False``::
-
-        response = http.request('GET', 'http://example.com/', retries=False)
-
-    Errors will be wrapped in :class:`~urllib3.exceptions.MaxRetryError` unless
-    retries are disabled, in which case the causing exception will be raised.
-
-    :param int total:
-        Total number of retries to allow. Takes precedence over other counts.
-
-        Set to ``None`` to remove this constraint and fall back on other
-        counts. It's a good idea to set this to some sensibly-high value to
-        account for unexpected edge cases and avoid infinite retry loops.
-
-        Set to ``0`` to fail on the first retry.
-
-        Set to ``False`` to disable and imply ``raise_on_redirect=False``.
-
-    :param int connect:
-        How many connection-related errors to retry on.
-
-        These are errors raised before the request is sent to the remote server,
-        which we assume has not triggered the server to process the request.
-
-        Set to ``0`` to fail on the first retry of this type.
-
-    :param int read:
-        How many times to retry on read errors.
-
-        These errors are raised after the request was sent to the server, so the
-        request may have side-effects.
-
-        Set to ``0`` to fail on the first retry of this type.
-
-    :param int redirect:
-        How many redirects to perform. Limit this to avoid infinite redirect
-        loops.
-
-        A redirect is a HTTP response with a status code 301, 302, 303, 307 or
-        308.
-
-        Set to ``0`` to fail on the first retry of this type.
-
-        Set to ``False`` to disable and imply ``raise_on_redirect=False``.
-
-    :param int status:
-        How many times to retry on bad status codes.
-
-        These are retries made on responses, where status code matches
-        ``status_forcelist``.
-
-        Set to ``0`` to fail on the first retry of this type.
-
-    :param iterable method_whitelist:
-        Set of uppercased HTTP method verbs that we should retry on.
-
-        By default, we only retry on methods which are considered to be
-        idempotent (multiple requests with the same parameters end with the
-        same state). See :attr:`Retry.DEFAULT_METHOD_WHITELIST`.
-
-        Set to a ``False`` value to retry on any verb.
-
-    :param iterable status_forcelist:
-        A set of integer HTTP status codes that we should force a retry on.
-        A retry is initiated if the request method is in ``method_whitelist``
-        and the response status code is in ``status_forcelist``.
-
-        By default, this is disabled with ``None``.
-
-    :param float backoff_factor:
-        A backoff factor to apply between attempts after the second try
-        (most errors are resolved immediately by a second try without a
-        delay). urllib3 will sleep for::
-
-            {backoff factor} * (2 ** ({number of total retries} - 1))
-
-        seconds. If the backoff_factor is 0.1, then :func:`.sleep` will sleep
-        for [0.0s, 0.2s, 0.4s, ...] between retries. It will never be longer
-        than :attr:`Retry.BACKOFF_MAX`.
-
-        By default, backoff is disabled (set to 0).
-
-    :param bool raise_on_redirect: Whether, if the number of redirects is
-        exhausted, to raise a MaxRetryError, or to return a response with a
-        response code in the 3xx range.
-
-    :param bool raise_on_status: Similar meaning to ``raise_on_redirect``:
-        whether we should raise an exception, or return a response,
-        if status falls in ``status_forcelist`` range and retries have
-        been exhausted.
-
-    :param tuple history: The history of the request encountered during
-        each call to :meth:`~Retry.increment`. The list is in the order
-        the requests occurred. Each list item is of class :class:`RequestHistory`.
-
-    :param bool respect_retry_after_header:
-        Whether to respect Retry-After header on status codes defined as
-        :attr:`Retry.RETRY_AFTER_STATUS_CODES` or not.
-
-    :param iterable remove_headers_on_redirect:
-        Sequence of headers to remove from the request when a response
-        indicating a redirect is returned before firing off the redirected
-        request.
-    """
-
-    DEFAULT_METHOD_WHITELIST = frozenset([
-        'HEAD', 'GET', 'PUT', 'DELETE', 'OPTIONS', 'TRACE'])
-
-    RETRY_AFTER_STATUS_CODES = frozenset([413, 429, 503])
-
-    DEFAULT_REDIRECT_HEADERS_BLACKLIST = frozenset(['Authorization'])
-
-    #: Maximum backoff time.
-    BACKOFF_MAX = 120
-
-    def __init__(self, total=10, connect=None, read=None, redirect=None, status=None,
-                 method_whitelist=DEFAULT_METHOD_WHITELIST, status_forcelist=None,
-                 backoff_factor=0, raise_on_redirect=True, raise_on_status=True,
-                 history=None, respect_retry_after_header=True,
-                 remove_headers_on_redirect=DEFAULT_REDIRECT_HEADERS_BLACKLIST):
-
-        self.total = total
-        self.connect = connect
-        self.read = read
-        self.status = status
-
-        if redirect is False or total is False:
-            redirect = 0
-            raise_on_redirect = False
-
-        self.redirect = redirect
-        self.status_forcelist = status_forcelist or set()
-        self.method_whitelist = method_whitelist
-        self.backoff_factor = backoff_factor
-        self.raise_on_redirect = raise_on_redirect
-        self.raise_on_status = raise_on_status
-        self.history = history or tuple()
-        self.respect_retry_after_header = respect_retry_after_header
-        self.remove_headers_on_redirect = remove_headers_on_redirect
-
-    def new(self, **kw):
-        params = dict(
-            total=self.total,
-            connect=self.connect, read=self.read, redirect=self.redirect, status=self.status,
-            method_whitelist=self.method_whitelist,
-            status_forcelist=self.status_forcelist,
-            backoff_factor=self.backoff_factor,
-            raise_on_redirect=self.raise_on_redirect,
-            raise_on_status=self.raise_on_status,
-            history=self.history,
-            remove_headers_on_redirect=self.remove_headers_on_redirect
-        )
-        params.update(kw)
-        return type(self)(**params)
-
-    @classmethod
-    def from_int(cls, retries, redirect=True, default=None):
-        """ Backwards-compatibility for the old retries format."""
-        if retries is None:
-            retries = default if default is not None else cls.DEFAULT
-
-        if isinstance(retries, Retry):
-            return retries
-
-        redirect = bool(redirect) and None
-        new_retries = cls(retries, redirect=redirect)
-        log.debug("Converted retries value: %r -> %r", retries, new_retries)
-        return new_retries
-
-    def get_backoff_time(self):
-        """ Formula for computing the current backoff
-
-        :rtype: float
-        """
-        # We want to consider only the last consecutive errors sequence (Ignore redirects).
-        consecutive_errors_len = len(list(takewhile(lambda x: x.redirect_location is None,
-                                                    reversed(self.history))))
-        if consecutive_errors_len <= 1:
-            return 0
-
-        backoff_value = self.backoff_factor * (2 ** (consecutive_errors_len - 1))
-        return min(self.BACKOFF_MAX, backoff_value)
-
-    def parse_retry_after(self, retry_after):
-        # Whitespace: https://tools.ietf.org/html/rfc7230#section-3.2.4
-        if re.match(r"^\s*[0-9]+\s*$", retry_after):
-            seconds = int(retry_after)
-        else:
-            retry_date_tuple = email.utils.parsedate(retry_after)
-            if retry_date_tuple is None:
-                raise InvalidHeader("Invalid Retry-After header: %s" % retry_after)
-            retry_date = time.mktime(retry_date_tuple)
-            seconds = retry_date - time.time()
-
-        if seconds < 0:
-            seconds = 0
-
-        return seconds
-
-    def get_retry_after(self, response):
-        """ Get the value of Retry-After in seconds. """
-
-        retry_after = response.getheader("Retry-After")
-
-        if retry_after is None:
-            return None
-
-        return self.parse_retry_after(retry_after)
-
-    def sleep_for_retry(self, response=None):
-        retry_after = self.get_retry_after(response)
-        if retry_after:
-            time.sleep(retry_after)
-            return True
-
-        return False
-
-    def _sleep_backoff(self):
-        backoff = self.get_backoff_time()
-        if backoff <= 0:
-            return
-        time.sleep(backoff)
-
-    def sleep(self, response=None):
-        """ Sleep between retry attempts.
-
-        This method will respect a server's ``Retry-After`` response header
-        and sleep the duration of the time requested. If that is not present, it
-        will use an exponential backoff. By default, the backoff factor is 0 and
-        this method will return immediately.
-        """
-
-        if response:
-            slept = self.sleep_for_retry(response)
-            if slept:
-                return
-
-        self._sleep_backoff()
-
-    def _is_connection_error(self, err):
-        """ Errors when we're fairly sure that the server did not receive the
-        request, so it should be safe to retry.
-        """
-        return isinstance(err, ConnectTimeoutError)
-
-    def _is_read_error(self, err):
-        """ Errors that occur after the request has been started, so we should
-        assume that the server began processing it.
-        """
-        return isinstance(err, (ReadTimeoutError, ProtocolError))
-
-    def _is_method_retryable(self, method):
-        """ Checks if a given HTTP method should be retried upon, depending if
-        it is included on the method whitelist.
-        """
-        if self.method_whitelist and method.upper() not in self.method_whitelist:
-            return False
-
-        return True
-
-    def is_retry(self, method, status_code, has_retry_after=False):
-        """ Is this method/status code retryable? (Based on whitelists and control
-        variables such as the number of total retries to allow, whether to
-        respect the Retry-After header, whether this header is present, and
-        whether the returned status code is on the list of status codes to
-        be retried upon on the presence of the aforementioned header)
-        """
-        if not self._is_method_retryable(method):
-            return False
-
-        if self.status_forcelist and status_code in self.status_forcelist:
-            return True
-
-        return (self.total and self.respect_retry_after_header and
-                has_retry_after and (status_code in self.RETRY_AFTER_STATUS_CODES))
-
-    def is_exhausted(self):
-        """ Are we out of retries? """
-        retry_counts = (self.total, self.connect, self.read, self.redirect, self.status)
-        retry_counts = list(filter(None, retry_counts))
-        if not retry_counts:
-            return False
-
-        return min(retry_counts) < 0
-
-    def increment(self, method=None, url=None, response=None, error=None,
-                  _pool=None, _stacktrace=None):
-        """ Return a new Retry object with incremented retry counters.
-
-        :param response: A response object, or None, if the server did not
-            return a response.
-        :type response: :class:`~urllib3.response.HTTPResponse`
-        :param Exception error: An error encountered during the request, or
-            None if the response was received successfully.
-
-        :return: A new ``Retry`` object.
-        """
-        if self.total is False and error:
-            # Disabled, indicate to re-raise the error.
-            raise six.reraise(type(error), error, _stacktrace)
-
-        total = self.total
-        if total is not None:
-            total -= 1
-
-        connect = self.connect
-        read = self.read
-        redirect = self.redirect
-        status_count = self.status
-        cause = 'unknown'
-        status = None
-        redirect_location = None
-
-        if error and self._is_connection_error(error):
-            # Connect retry?
-            if connect is False:
-                raise six.reraise(type(error), error, _stacktrace)
-            elif connect is not None:
-                connect -= 1
-
-        elif error and self._is_read_error(error):
-            # Read retry?
-            if read is False or not self._is_method_retryable(method):
-                raise six.reraise(type(error), error, _stacktrace)
-            elif read is not None:
-                read -= 1
-
-        elif response and response.get_redirect_location():
-            # Redirect retry?
-            if redirect is not None:
-                redirect -= 1
-            cause = 'too many redirects'
-            redirect_location = response.get_redirect_location()
-            status = response.status
-
-        else:
-            # Incrementing because of a server error like a 500 in
-            # status_forcelist and a the given method is in the whitelist
-            cause = ResponseError.GENERIC_ERROR
-            if response and response.status:
-                if status_count is not None:
-                    status_count -= 1
-                cause = ResponseError.SPECIFIC_ERROR.format(
-                    status_code=response.status)
-                status = response.status
-
-        history = self.history + (RequestHistory(method, url, error, status, redirect_location),)
-
-        new_retry = self.new(
-            total=total,
-            connect=connect, read=read, redirect=redirect, status=status_count,
-            history=history)
-
-        if new_retry.is_exhausted():
-            raise MaxRetryError(_pool, url, error or ResponseError(cause))
-
-        log.debug("Incremented Retry for (url='%s'): %r", url, new_retry)
-
-        return new_retry
-
-    def __repr__(self):
-        return ('{cls.__name__}(total={self.total}, connect={self.connect}, '
-                'read={self.read}, redirect={self.redirect}, status={self.status})').format(
-                    cls=type(self), self=self)
-
-
-# For backwards compatibility (equivalent to pre-v1.9):
-Retry.DEFAULT = Retry(3)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/ssl_.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/ssl_.py
deleted file mode 100644
index dfc553f..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/ssl_.py
+++ /dev/null
@@ -1,381 +0,0 @@
-from __future__ import absolute_import
-import errno
-import warnings
-import hmac
-import socket
-
-from binascii import hexlify, unhexlify
-from hashlib import md5, sha1, sha256
-
-from ..exceptions import SSLError, InsecurePlatformWarning, SNIMissingWarning
-from ..packages import six
-
-
-SSLContext = None
-HAS_SNI = False
-IS_PYOPENSSL = False
-IS_SECURETRANSPORT = False
-
-# Maps the length of a digest to a possible hash function producing this digest
-HASHFUNC_MAP = {
-    32: md5,
-    40: sha1,
-    64: sha256,
-}
-
-
-def _const_compare_digest_backport(a, b):
-    """
-    Compare two digests of equal length in constant time.
-
-    The digests must be of type str/bytes.
-    Returns True if the digests match, and False otherwise.
-    """
-    result = abs(len(a) - len(b))
-    for l, r in zip(bytearray(a), bytearray(b)):
-        result |= l ^ r
-    return result == 0
-
-
-_const_compare_digest = getattr(hmac, 'compare_digest',
-                                _const_compare_digest_backport)
-
-
-try:  # Test for SSL features
-    import ssl
-    from ssl import wrap_socket, CERT_NONE, PROTOCOL_SSLv23
-    from ssl import HAS_SNI  # Has SNI?
-except ImportError:
-    pass
-
-
-try:
-    from ssl import OP_NO_SSLv2, OP_NO_SSLv3, OP_NO_COMPRESSION
-except ImportError:
-    OP_NO_SSLv2, OP_NO_SSLv3 = 0x1000000, 0x2000000
-    OP_NO_COMPRESSION = 0x20000
-
-
-# Python 2.7 doesn't have inet_pton on non-Linux so we fallback on inet_aton in
-# those cases. This means that we can only detect IPv4 addresses in this case.
-if hasattr(socket, 'inet_pton'):
-    inet_pton = socket.inet_pton
-else:
-    # Maybe we can use ipaddress if the user has urllib3[secure]?
-    try:
-        from pip._vendor import ipaddress
-
-        def inet_pton(_, host):
-            if isinstance(host, bytes):
-                host = host.decode('ascii')
-            return ipaddress.ip_address(host)
-
-    except ImportError:  # Platform-specific: Non-Linux
-        def inet_pton(_, host):
-            return socket.inet_aton(host)
-
-
-# A secure default.
-# Sources for more information on TLS ciphers:
-#
-# - https://wiki.mozilla.org/Security/Server_Side_TLS
-# - https://www.ssllabs.com/projects/best-practices/index.html
-# - https://hynek.me/articles/hardening-your-web-servers-ssl-ciphers/
-#
-# The general intent is:
-# - Prefer TLS 1.3 cipher suites
-# - prefer cipher suites that offer perfect forward secrecy (DHE/ECDHE),
-# - prefer ECDHE over DHE for better performance,
-# - prefer any AES-GCM and ChaCha20 over any AES-CBC for better performance and
-#   security,
-# - prefer AES-GCM over ChaCha20 because hardware-accelerated AES is common,
-# - disable NULL authentication, MD5 MACs and DSS for security reasons.
-DEFAULT_CIPHERS = ':'.join([
-    'TLS13-AES-256-GCM-SHA384',
-    'TLS13-CHACHA20-POLY1305-SHA256',
-    'TLS13-AES-128-GCM-SHA256',
-    'ECDH+AESGCM',
-    'ECDH+CHACHA20',
-    'DH+AESGCM',
-    'DH+CHACHA20',
-    'ECDH+AES256',
-    'DH+AES256',
-    'ECDH+AES128',
-    'DH+AES',
-    'RSA+AESGCM',
-    'RSA+AES',
-    '!aNULL',
-    '!eNULL',
-    '!MD5',
-])
-
-try:
-    from ssl import SSLContext  # Modern SSL?
-except ImportError:
-    import sys
-
-    class SSLContext(object):  # Platform-specific: Python 2
-        def __init__(self, protocol_version):
-            self.protocol = protocol_version
-            # Use default values from a real SSLContext
-            self.check_hostname = False
-            self.verify_mode = ssl.CERT_NONE
-            self.ca_certs = None
-            self.options = 0
-            self.certfile = None
-            self.keyfile = None
-            self.ciphers = None
-
-        def load_cert_chain(self, certfile, keyfile):
-            self.certfile = certfile
-            self.keyfile = keyfile
-
-        def load_verify_locations(self, cafile=None, capath=None):
-            self.ca_certs = cafile
-
-            if capath is not None:
-                raise SSLError("CA directories not supported in older Pythons")
-
-        def set_ciphers(self, cipher_suite):
-            self.ciphers = cipher_suite
-
-        def wrap_socket(self, socket, server_hostname=None, server_side=False):
-            warnings.warn(
-                'A true SSLContext object is not available. This prevents '
-                'urllib3 from configuring SSL appropriately and may cause '
-                'certain SSL connections to fail. You can upgrade to a newer '
-                'version of Python to solve this. For more information, see '
-                'https://urllib3.readthedocs.io/en/latest/advanced-usage.html'
-                '#ssl-warnings',
-                InsecurePlatformWarning
-            )
-            kwargs = {
-                'keyfile': self.keyfile,
-                'certfile': self.certfile,
-                'ca_certs': self.ca_certs,
-                'cert_reqs': self.verify_mode,
-                'ssl_version': self.protocol,
-                'server_side': server_side,
-            }
-            return wrap_socket(socket, ciphers=self.ciphers, **kwargs)
-
-
-def assert_fingerprint(cert, fingerprint):
-    """
-    Checks if given fingerprint matches the supplied certificate.
-
-    :param cert:
-        Certificate as bytes object.
-    :param fingerprint:
-        Fingerprint as string of hexdigits, can be interspersed by colons.
-    """
-
-    fingerprint = fingerprint.replace(':', '').lower()
-    digest_length = len(fingerprint)
-    hashfunc = HASHFUNC_MAP.get(digest_length)
-    if not hashfunc:
-        raise SSLError(
-            'Fingerprint of invalid length: {0}'.format(fingerprint))
-
-    # We need encode() here for py32; works on py2 and p33.
-    fingerprint_bytes = unhexlify(fingerprint.encode())
-
-    cert_digest = hashfunc(cert).digest()
-
-    if not _const_compare_digest(cert_digest, fingerprint_bytes):
-        raise SSLError('Fingerprints did not match. Expected "{0}", got "{1}".'
-                       .format(fingerprint, hexlify(cert_digest)))
-
-
-def resolve_cert_reqs(candidate):
-    """
-    Resolves the argument to a numeric constant, which can be passed to
-    the wrap_socket function/method from the ssl module.
-    Defaults to :data:`ssl.CERT_NONE`.
-    If given a string it is assumed to be the name of the constant in the
-    :mod:`ssl` module or its abbreviation.
-    (So you can specify `REQUIRED` instead of `CERT_REQUIRED`.
-    If it's neither `None` nor a string we assume it is already the numeric
-    constant which can directly be passed to wrap_socket.
-    """
-    if candidate is None:
-        return CERT_NONE
-
-    if isinstance(candidate, str):
-        res = getattr(ssl, candidate, None)
-        if res is None:
-            res = getattr(ssl, 'CERT_' + candidate)
-        return res
-
-    return candidate
-
-
-def resolve_ssl_version(candidate):
-    """
-    like resolve_cert_reqs
-    """
-    if candidate is None:
-        return PROTOCOL_SSLv23
-
-    if isinstance(candidate, str):
-        res = getattr(ssl, candidate, None)
-        if res is None:
-            res = getattr(ssl, 'PROTOCOL_' + candidate)
-        return res
-
-    return candidate
-
-
-def create_urllib3_context(ssl_version=None, cert_reqs=None,
-                           options=None, ciphers=None):
-    """All arguments have the same meaning as ``ssl_wrap_socket``.
-
-    By default, this function does a lot of the same work that
-    ``ssl.create_default_context`` does on Python 3.4+. It:
-
-    - Disables SSLv2, SSLv3, and compression
-    - Sets a restricted set of server ciphers
-
-    If you wish to enable SSLv3, you can do::
-
-        from pip._vendor.urllib3.util import ssl_
-        context = ssl_.create_urllib3_context()
-        context.options &= ~ssl_.OP_NO_SSLv3
-
-    You can do the same to enable compression (substituting ``COMPRESSION``
-    for ``SSLv3`` in the last line above).
-
-    :param ssl_version:
-        The desired protocol version to use. This will default to
-        PROTOCOL_SSLv23 which will negotiate the highest protocol that both
-        the server and your installation of OpenSSL support.
-    :param cert_reqs:
-        Whether to require the certificate verification. This defaults to
-        ``ssl.CERT_REQUIRED``.
-    :param options:
-        Specific OpenSSL options. These default to ``ssl.OP_NO_SSLv2``,
-        ``ssl.OP_NO_SSLv3``, ``ssl.OP_NO_COMPRESSION``.
-    :param ciphers:
-        Which cipher suites to allow the server to select.
-    :returns:
-        Constructed SSLContext object with specified options
-    :rtype: SSLContext
-    """
-    context = SSLContext(ssl_version or ssl.PROTOCOL_SSLv23)
-
-    context.set_ciphers(ciphers or DEFAULT_CIPHERS)
-
-    # Setting the default here, as we may have no ssl module on import
-    cert_reqs = ssl.CERT_REQUIRED if cert_reqs is None else cert_reqs
-
-    if options is None:
-        options = 0
-        # SSLv2 is easily broken and is considered harmful and dangerous
-        options |= OP_NO_SSLv2
-        # SSLv3 has several problems and is now dangerous
-        options |= OP_NO_SSLv3
-        # Disable compression to prevent CRIME attacks for OpenSSL 1.0+
-        # (issue #309)
-        options |= OP_NO_COMPRESSION
-
-    context.options |= options
-
-    context.verify_mode = cert_reqs
-    if getattr(context, 'check_hostname', None) is not None:  # Platform-specific: Python 3.2
-        # We do our own verification, including fingerprints and alternative
-        # hostnames. So disable it here
-        context.check_hostname = False
-    return context
-
-
-def ssl_wrap_socket(sock, keyfile=None, certfile=None, cert_reqs=None,
-                    ca_certs=None, server_hostname=None,
-                    ssl_version=None, ciphers=None, ssl_context=None,
-                    ca_cert_dir=None):
-    """
-    All arguments except for server_hostname, ssl_context, and ca_cert_dir have
-    the same meaning as they do when using :func:`ssl.wrap_socket`.
-
-    :param server_hostname:
-        When SNI is supported, the expected hostname of the certificate
-    :param ssl_context:
-        A pre-made :class:`SSLContext` object. If none is provided, one will
-        be created using :func:`create_urllib3_context`.
-    :param ciphers:
-        A string of ciphers we wish the client to support.
-    :param ca_cert_dir:
-        A directory containing CA certificates in multiple separate files, as
-        supported by OpenSSL's -CApath flag or the capath argument to
-        SSLContext.load_verify_locations().
-    """
-    context = ssl_context
-    if context is None:
-        # Note: This branch of code and all the variables in it are no longer
-        # used by urllib3 itself. We should consider deprecating and removing
-        # this code.
-        context = create_urllib3_context(ssl_version, cert_reqs,
-                                         ciphers=ciphers)
-
-    if ca_certs or ca_cert_dir:
-        try:
-            context.load_verify_locations(ca_certs, ca_cert_dir)
-        except IOError as e:  # Platform-specific: Python 2.7
-            raise SSLError(e)
-        # Py33 raises FileNotFoundError which subclasses OSError
-        # These are not equivalent unless we check the errno attribute
-        except OSError as e:  # Platform-specific: Python 3.3 and beyond
-            if e.errno == errno.ENOENT:
-                raise SSLError(e)
-            raise
-    elif getattr(context, 'load_default_certs', None) is not None:
-        # try to load OS default certs; works well on Windows (require Python3.4+)
-        context.load_default_certs()
-
-    if certfile:
-        context.load_cert_chain(certfile, keyfile)
-
-    # If we detect server_hostname is an IP address then the SNI
-    # extension should not be used according to RFC3546 Section 3.1
-    # We shouldn't warn the user if SNI isn't available but we would
-    # not be using SNI anyways due to IP address for server_hostname.
-    if ((server_hostname is not None and not is_ipaddress(server_hostname))
-            or IS_SECURETRANSPORT):
-        if HAS_SNI and server_hostname is not None:
-            return context.wrap_socket(sock, server_hostname=server_hostname)
-
-        warnings.warn(
-            'An HTTPS request has been made, but the SNI (Server Name '
-            'Indication) extension to TLS is not available on this platform. '
-            'This may cause the server to present an incorrect TLS '
-            'certificate, which can cause validation failures. You can upgrade to '
-            'a newer version of Python to solve this. For more information, see '
-            'https://urllib3.readthedocs.io/en/latest/advanced-usage.html'
-            '#ssl-warnings',
-            SNIMissingWarning
-        )
-
-    return context.wrap_socket(sock)
-
-
-def is_ipaddress(hostname):
-    """Detects whether the hostname given is an IP address.
-
-    :param str hostname: Hostname to examine.
-    :return: True if the hostname is an IP address, False otherwise.
-    """
-    if six.PY3 and isinstance(hostname, bytes):
-        # IDN A-label bytes are ASCII compatible.
-        hostname = hostname.decode('ascii')
-
-    families = [socket.AF_INET]
-    if hasattr(socket, 'AF_INET6'):
-        families.append(socket.AF_INET6)
-
-    for af in families:
-        try:
-            inet_pton(af, hostname)
-        except (socket.error, ValueError, OSError):
-            pass
-        else:
-            return True
-    return False
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/timeout.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/timeout.py
deleted file mode 100644
index cec817e..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/timeout.py
+++ /dev/null
@@ -1,242 +0,0 @@
-from __future__ import absolute_import
-# The default socket timeout, used by httplib to indicate that no timeout was
-# specified by the user
-from socket import _GLOBAL_DEFAULT_TIMEOUT
-import time
-
-from ..exceptions import TimeoutStateError
-
-# A sentinel value to indicate that no timeout was specified by the user in
-# urllib3
-_Default = object()
-
-
-# Use time.monotonic if available.
-current_time = getattr(time, "monotonic", time.time)
-
-
-class Timeout(object):
-    """ Timeout configuration.
-
-    Timeouts can be defined as a default for a pool::
-
-        timeout = Timeout(connect=2.0, read=7.0)
-        http = PoolManager(timeout=timeout)
-        response = http.request('GET', 'http://example.com/')
-
-    Or per-request (which overrides the default for the pool)::
-
-        response = http.request('GET', 'http://example.com/', timeout=Timeout(10))
-
-    Timeouts can be disabled by setting all the parameters to ``None``::
-
-        no_timeout = Timeout(connect=None, read=None)
-        response = http.request('GET', 'http://example.com/, timeout=no_timeout)
-
-
-    :param total:
-        This combines the connect and read timeouts into one; the read timeout
-        will be set to the time leftover from the connect attempt. In the
-        event that both a connect timeout and a total are specified, or a read
-        timeout and a total are specified, the shorter timeout will be applied.
-
-        Defaults to None.
-
-    :type total: integer, float, or None
-
-    :param connect:
-        The maximum amount of time to wait for a connection attempt to a server
-        to succeed. Omitting the parameter will default the connect timeout to
-        the system default, probably `the global default timeout in socket.py
-        <http://hg.python.org/cpython/file/603b4d593758/Lib/socket.py#l535>`_.
-        None will set an infinite timeout for connection attempts.
-
-    :type connect: integer, float, or None
-
-    :param read:
-        The maximum amount of time to wait between consecutive
-        read operations for a response from the server. Omitting
-        the parameter will default the read timeout to the system
-        default, probably `the global default timeout in socket.py
-        <http://hg.python.org/cpython/file/603b4d593758/Lib/socket.py#l535>`_.
-        None will set an infinite timeout.
-
-    :type read: integer, float, or None
-
-    .. note::
-
-        Many factors can affect the total amount of time for urllib3 to return
-        an HTTP response.
-
-        For example, Python's DNS resolver does not obey the timeout specified
-        on the socket. Other factors that can affect total request time include
-        high CPU load, high swap, the program running at a low priority level,
-        or other behaviors.
-
-        In addition, the read and total timeouts only measure the time between
-        read operations on the socket connecting the client and the server,
-        not the total amount of time for the request to return a complete
-        response. For most requests, the timeout is raised because the server
-        has not sent the first byte in the specified time. This is not always
-        the case; if a server streams one byte every fifteen seconds, a timeout
-        of 20 seconds will not trigger, even though the request will take
-        several minutes to complete.
-
-        If your goal is to cut off any request after a set amount of wall clock
-        time, consider having a second "watcher" thread to cut off a slow
-        request.
-    """
-
-    #: A sentinel object representing the default timeout value
-    DEFAULT_TIMEOUT = _GLOBAL_DEFAULT_TIMEOUT
-
-    def __init__(self, total=None, connect=_Default, read=_Default):
-        self._connect = self._validate_timeout(connect, 'connect')
-        self._read = self._validate_timeout(read, 'read')
-        self.total = self._validate_timeout(total, 'total')
-        self._start_connect = None
-
-    def __str__(self):
-        return '%s(connect=%r, read=%r, total=%r)' % (
-            type(self).__name__, self._connect, self._read, self.total)
-
-    @classmethod
-    def _validate_timeout(cls, value, name):
-        """ Check that a timeout attribute is valid.
-
-        :param value: The timeout value to validate
-        :param name: The name of the timeout attribute to validate. This is
-            used to specify in error messages.
-        :return: The validated and casted version of the given value.
-        :raises ValueError: If it is a numeric value less than or equal to
-            zero, or the type is not an integer, float, or None.
-        """
-        if value is _Default:
-            return cls.DEFAULT_TIMEOUT
-
-        if value is None or value is cls.DEFAULT_TIMEOUT:
-            return value
-
-        if isinstance(value, bool):
-            raise ValueError("Timeout cannot be a boolean value. It must "
-                             "be an int, float or None.")
-        try:
-            float(value)
-        except (TypeError, ValueError):
-            raise ValueError("Timeout value %s was %s, but it must be an "
-                             "int, float or None." % (name, value))
-
-        try:
-            if value <= 0:
-                raise ValueError("Attempted to set %s timeout to %s, but the "
-                                 "timeout cannot be set to a value less "
-                                 "than or equal to 0." % (name, value))
-        except TypeError:  # Python 3
-            raise ValueError("Timeout value %s was %s, but it must be an "
-                             "int, float or None." % (name, value))
-
-        return value
-
-    @classmethod
-    def from_float(cls, timeout):
-        """ Create a new Timeout from a legacy timeout value.
-
-        The timeout value used by httplib.py sets the same timeout on the
-        connect(), and recv() socket requests. This creates a :class:`Timeout`
-        object that sets the individual timeouts to the ``timeout`` value
-        passed to this function.
-
-        :param timeout: The legacy timeout value.
-        :type timeout: integer, float, sentinel default object, or None
-        :return: Timeout object
-        :rtype: :class:`Timeout`
-        """
-        return Timeout(read=timeout, connect=timeout)
-
-    def clone(self):
-        """ Create a copy of the timeout object
-
-        Timeout properties are stored per-pool but each request needs a fresh
-        Timeout object to ensure each one has its own start/stop configured.
-
-        :return: a copy of the timeout object
-        :rtype: :class:`Timeout`
-        """
-        # We can't use copy.deepcopy because that will also create a new object
-        # for _GLOBAL_DEFAULT_TIMEOUT, which socket.py uses as a sentinel to
-        # detect the user default.
-        return Timeout(connect=self._connect, read=self._read,
-                       total=self.total)
-
-    def start_connect(self):
-        """ Start the timeout clock, used during a connect() attempt
-
-        :raises urllib3.exceptions.TimeoutStateError: if you attempt
-            to start a timer that has been started already.
-        """
-        if self._start_connect is not None:
-            raise TimeoutStateError("Timeout timer has already been started.")
-        self._start_connect = current_time()
-        return self._start_connect
-
-    def get_connect_duration(self):
-        """ Gets the time elapsed since the call to :meth:`start_connect`.
-
-        :return: Elapsed time.
-        :rtype: float
-        :raises urllib3.exceptions.TimeoutStateError: if you attempt
-            to get duration for a timer that hasn't been started.
-        """
-        if self._start_connect is None:
-            raise TimeoutStateError("Can't get connect duration for timer "
-                                    "that has not started.")
-        return current_time() - self._start_connect
-
-    @property
-    def connect_timeout(self):
-        """ Get the value to use when setting a connection timeout.
-
-        This will be a positive float or integer, the value None
-        (never timeout), or the default system timeout.
-
-        :return: Connect timeout.
-        :rtype: int, float, :attr:`Timeout.DEFAULT_TIMEOUT` or None
-        """
-        if self.total is None:
-            return self._connect
-
-        if self._connect is None or self._connect is self.DEFAULT_TIMEOUT:
-            return self.total
-
-        return min(self._connect, self.total)
-
-    @property
-    def read_timeout(self):
-        """ Get the value for the read timeout.
-
-        This assumes some time has elapsed in the connection timeout and
-        computes the read timeout appropriately.
-
-        If self.total is set, the read timeout is dependent on the amount of
-        time taken by the connect timeout. If the connection time has not been
-        established, a :exc:`~urllib3.exceptions.TimeoutStateError` will be
-        raised.
-
-        :return: Value to use for the read timeout.
-        :rtype: int, float, :attr:`Timeout.DEFAULT_TIMEOUT` or None
-        :raises urllib3.exceptions.TimeoutStateError: If :meth:`start_connect`
-            has not yet been called on this object.
-        """
-        if (self.total is not None and
-                self.total is not self.DEFAULT_TIMEOUT and
-                self._read is not None and
-                self._read is not self.DEFAULT_TIMEOUT):
-            # In case the connect timeout has not yet been established.
-            if self._start_connect is None:
-                return self._read
-            return max(0, min(self.total - self.get_connect_duration(),
-                              self._read))
-        elif self.total is not None and self.total is not self.DEFAULT_TIMEOUT:
-            return max(0, self.total - self.get_connect_duration())
-        else:
-            return self._read
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/url.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/url.py
deleted file mode 100644
index 6b6f996..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/url.py
+++ /dev/null
@@ -1,230 +0,0 @@
-from __future__ import absolute_import
-from collections import namedtuple
-
-from ..exceptions import LocationParseError
-
-
-url_attrs = ['scheme', 'auth', 'host', 'port', 'path', 'query', 'fragment']
-
-# We only want to normalize urls with an HTTP(S) scheme.
-# urllib3 infers URLs without a scheme (None) to be http.
-NORMALIZABLE_SCHEMES = ('http', 'https', None)
-
-
-class Url(namedtuple('Url', url_attrs)):
-    """
-    Datastructure for representing an HTTP URL. Used as a return value for
-    :func:`parse_url`. Both the scheme and host are normalized as they are
-    both case-insensitive according to RFC 3986.
-    """
-    __slots__ = ()
-
-    def __new__(cls, scheme=None, auth=None, host=None, port=None, path=None,
-                query=None, fragment=None):
-        if path and not path.startswith('/'):
-            path = '/' + path
-        if scheme:
-            scheme = scheme.lower()
-        if host and scheme in NORMALIZABLE_SCHEMES:
-            host = host.lower()
-        return super(Url, cls).__new__(cls, scheme, auth, host, port, path,
-                                       query, fragment)
-
-    @property
-    def hostname(self):
-        """For backwards-compatibility with urlparse. We're nice like that."""
-        return self.host
-
-    @property
-    def request_uri(self):
-        """Absolute path including the query string."""
-        uri = self.path or '/'
-
-        if self.query is not None:
-            uri += '?' + self.query
-
-        return uri
-
-    @property
-    def netloc(self):
-        """Network location including host and port"""
-        if self.port:
-            return '%s:%d' % (self.host, self.port)
-        return self.host
-
-    @property
-    def url(self):
-        """
-        Convert self into a url
-
-        This function should more or less round-trip with :func:`.parse_url`. The
-        returned url may not be exactly the same as the url inputted to
-        :func:`.parse_url`, but it should be equivalent by the RFC (e.g., urls
-        with a blank port will have : removed).
-
-        Example: ::
-
-            >>> U = parse_url('http://google.com/mail/')
-            >>> U.url
-            'http://google.com/mail/'
-            >>> Url('http', 'username:password', 'host.com', 80,
-            ... '/path', 'query', 'fragment').url
-            'http://username:password@host.com:80/path?query#fragment'
-        """
-        scheme, auth, host, port, path, query, fragment = self
-        url = ''
-
-        # We use "is not None" we want things to happen with empty strings (or 0 port)
-        if scheme is not None:
-            url += scheme + '://'
-        if auth is not None:
-            url += auth + '@'
-        if host is not None:
-            url += host
-        if port is not None:
-            url += ':' + str(port)
-        if path is not None:
-            url += path
-        if query is not None:
-            url += '?' + query
-        if fragment is not None:
-            url += '#' + fragment
-
-        return url
-
-    def __str__(self):
-        return self.url
-
-
-def split_first(s, delims):
-    """
-    Given a string and an iterable of delimiters, split on the first found
-    delimiter. Return two split parts and the matched delimiter.
-
-    If not found, then the first part is the full input string.
-
-    Example::
-
-        >>> split_first('foo/bar?baz', '?/=')
-        ('foo', 'bar?baz', '/')
-        >>> split_first('foo/bar?baz', '123')
-        ('foo/bar?baz', '', None)
-
-    Scales linearly with number of delims. Not ideal for large number of delims.
-    """
-    min_idx = None
-    min_delim = None
-    for d in delims:
-        idx = s.find(d)
-        if idx < 0:
-            continue
-
-        if min_idx is None or idx < min_idx:
-            min_idx = idx
-            min_delim = d
-
-    if min_idx is None or min_idx < 0:
-        return s, '', None
-
-    return s[:min_idx], s[min_idx + 1:], min_delim
-
-
-def parse_url(url):
-    """
-    Given a url, return a parsed :class:`.Url` namedtuple. Best-effort is
-    performed to parse incomplete urls. Fields not provided will be None.
-
-    Partly backwards-compatible with :mod:`urlparse`.
-
-    Example::
-
-        >>> parse_url('http://google.com/mail/')
-        Url(scheme='http', host='google.com', port=None, path='/mail/', ...)
-        >>> parse_url('google.com:80')
-        Url(scheme=None, host='google.com', port=80, path=None, ...)
-        >>> parse_url('/foo?bar')
-        Url(scheme=None, host=None, port=None, path='/foo', query='bar', ...)
-    """
-
-    # While this code has overlap with stdlib's urlparse, it is much
-    # simplified for our needs and less annoying.
-    # Additionally, this implementations does silly things to be optimal
-    # on CPython.
-
-    if not url:
-        # Empty
-        return Url()
-
-    scheme = None
-    auth = None
-    host = None
-    port = None
-    path = None
-    fragment = None
-    query = None
-
-    # Scheme
-    if '://' in url:
-        scheme, url = url.split('://', 1)
-
-    # Find the earliest Authority Terminator
-    # (http://tools.ietf.org/html/rfc3986#section-3.2)
-    url, path_, delim = split_first(url, ['/', '?', '#'])
-
-    if delim:
-        # Reassemble the path
-        path = delim + path_
-
-    # Auth
-    if '@' in url:
-        # Last '@' denotes end of auth part
-        auth, url = url.rsplit('@', 1)
-
-    # IPv6
-    if url and url[0] == '[':
-        host, url = url.split(']', 1)
-        host += ']'
-
-    # Port
-    if ':' in url:
-        _host, port = url.split(':', 1)
-
-        if not host:
-            host = _host
-
-        if port:
-            # If given, ports must be integers. No whitespace, no plus or
-            # minus prefixes, no non-integer digits such as ^2 (superscript).
-            if not port.isdigit():
-                raise LocationParseError(url)
-            try:
-                port = int(port)
-            except ValueError:
-                raise LocationParseError(url)
-        else:
-            # Blank ports are cool, too. (rfc3986#section-3.2.3)
-            port = None
-
-    elif not host and url:
-        host = url
-
-    if not path:
-        return Url(scheme, auth, host, port, path, query, fragment)
-
-    # Fragment
-    if '#' in path:
-        path, fragment = path.split('#', 1)
-
-    # Query
-    if '?' in path:
-        path, query = path.split('?', 1)
-
-    return Url(scheme, auth, host, port, path, query, fragment)
-
-
-def get_host(url):
-    """
-    Deprecated. Use :func:`parse_url` instead.
-    """
-    p = parse_url(url)
-    return p.scheme or 'http', p.hostname, p.port
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/wait.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/wait.py
deleted file mode 100644
index 4db71ba..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/urllib3/util/wait.py
+++ /dev/null
@@ -1,150 +0,0 @@
-import errno
-from functools import partial
-import select
-import sys
-try:
-    from time import monotonic
-except ImportError:
-    from time import time as monotonic
-
-__all__ = ["NoWayToWaitForSocketError", "wait_for_read", "wait_for_write"]
-
-
-class NoWayToWaitForSocketError(Exception):
-    pass
-
-
-# How should we wait on sockets?
-#
-# There are two types of APIs you can use for waiting on sockets: the fancy
-# modern stateful APIs like epoll/kqueue, and the older stateless APIs like
-# select/poll. The stateful APIs are more efficient when you have a lots of
-# sockets to keep track of, because you can set them up once and then use them
-# lots of times. But we only ever want to wait on a single socket at a time
-# and don't want to keep track of state, so the stateless APIs are actually
-# more efficient. So we want to use select() or poll().
-#
-# Now, how do we choose between select() and poll()? On traditional Unixes,
-# select() has a strange calling convention that makes it slow, or fail
-# altogether, for high-numbered file descriptors. The point of poll() is to fix
-# that, so on Unixes, we prefer poll().
-#
-# On Windows, there is no poll() (or at least Python doesn't provide a wrapper
-# for it), but that's OK, because on Windows, select() doesn't have this
-# strange calling convention; plain select() works fine.
-#
-# So: on Windows we use select(), and everywhere else we use poll(). We also
-# fall back to select() in case poll() is somehow broken or missing.
-
-if sys.version_info >= (3, 5):
-    # Modern Python, that retries syscalls by default
-    def _retry_on_intr(fn, timeout):
-        return fn(timeout)
-else:
-    # Old and broken Pythons.
-    def _retry_on_intr(fn, timeout):
-        if timeout is None:
-            deadline = float("inf")
-        else:
-            deadline = monotonic() + timeout
-
-        while True:
-            try:
-                return fn(timeout)
-            # OSError for 3 <= pyver < 3.5, select.error for pyver <= 2.7
-            except (OSError, select.error) as e:
-                # 'e.args[0]' incantation works for both OSError and select.error
-                if e.args[0] != errno.EINTR:
-                    raise
-                else:
-                    timeout = deadline - monotonic()
-                    if timeout < 0:
-                        timeout = 0
-                    if timeout == float("inf"):
-                        timeout = None
-                    continue
-
-
-def select_wait_for_socket(sock, read=False, write=False, timeout=None):
-    if not read and not write:
-        raise RuntimeError("must specify at least one of read=True, write=True")
-    rcheck = []
-    wcheck = []
-    if read:
-        rcheck.append(sock)
-    if write:
-        wcheck.append(sock)
-    # When doing a non-blocking connect, most systems signal success by
-    # marking the socket writable. Windows, though, signals success by marked
-    # it as "exceptional". We paper over the difference by checking the write
-    # sockets for both conditions. (The stdlib selectors module does the same
-    # thing.)
-    fn = partial(select.select, rcheck, wcheck, wcheck)
-    rready, wready, xready = _retry_on_intr(fn, timeout)
-    return bool(rready or wready or xready)
-
-
-def poll_wait_for_socket(sock, read=False, write=False, timeout=None):
-    if not read and not write:
-        raise RuntimeError("must specify at least one of read=True, write=True")
-    mask = 0
-    if read:
-        mask |= select.POLLIN
-    if write:
-        mask |= select.POLLOUT
-    poll_obj = select.poll()
-    poll_obj.register(sock, mask)
-
-    # For some reason, poll() takes timeout in milliseconds
-    def do_poll(t):
-        if t is not None:
-            t *= 1000
-        return poll_obj.poll(t)
-
-    return bool(_retry_on_intr(do_poll, timeout))
-
-
-def null_wait_for_socket(*args, **kwargs):
-    raise NoWayToWaitForSocketError("no select-equivalent available")
-
-
-def _have_working_poll():
-    # Apparently some systems have a select.poll that fails as soon as you try
-    # to use it, either due to strange configuration or broken monkeypatching
-    # from libraries like eventlet/greenlet.
-    try:
-        poll_obj = select.poll()
-        _retry_on_intr(poll_obj.poll, 0)
-    except (AttributeError, OSError):
-        return False
-    else:
-        return True
-
-
-def wait_for_socket(*args, **kwargs):
-    # We delay choosing which implementation to use until the first time we're
-    # called. We could do it at import time, but then we might make the wrong
-    # decision if someone goes wild with monkeypatching select.poll after
-    # we're imported.
-    global wait_for_socket
-    if _have_working_poll():
-        wait_for_socket = poll_wait_for_socket
-    elif hasattr(select, "select"):
-        wait_for_socket = select_wait_for_socket
-    else:  # Platform-specific: Appengine.
-        wait_for_socket = null_wait_for_socket
-    return wait_for_socket(*args, **kwargs)
-
-
-def wait_for_read(sock, timeout=None):
-    """ Waits for reading to be available on a given socket.
-    Returns True if the socket is readable, or False if the timeout expired.
-    """
-    return wait_for_socket(sock, read=True, timeout=timeout)
-
-
-def wait_for_write(sock, timeout=None):
-    """ Waits for writing to be available on a given socket.
-    Returns True if the socket is readable, or False if the timeout expired.
-    """
-    return wait_for_socket(sock, write=True, timeout=timeout)
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/webencodings/__init__.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/webencodings/__init__.py
deleted file mode 100644
index d21d697..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/webencodings/__init__.py
+++ /dev/null
@@ -1,342 +0,0 @@
-# coding: utf-8
-"""
-
-    webencodings
-    ~~~~~~~~~~~~
-
-    This is a Python implementation of the `WHATWG Encoding standard
-    <http://encoding.spec.whatwg.org/>`. See README for details.
-
-    :copyright: Copyright 2012 by Simon Sapin
-    :license: BSD, see LICENSE for details.
-
-"""
-
-from __future__ import unicode_literals
-
-import codecs
-
-from .labels import LABELS
-
-
-VERSION = '0.5.1'
-
-
-# Some names in Encoding are not valid Python aliases. Remap these.
-PYTHON_NAMES = {
-    'iso-8859-8-i': 'iso-8859-8',
-    'x-mac-cyrillic': 'mac-cyrillic',
-    'macintosh': 'mac-roman',
-    'windows-874': 'cp874'}
-
-CACHE = {}
-
-
-def ascii_lower(string):
-    r"""Transform (only) ASCII letters to lower case: A-Z is mapped to a-z.
-
-    :param string: An Unicode string.
-    :returns: A new Unicode string.
-
-    This is used for `ASCII case-insensitive
-    <http://encoding.spec.whatwg.org/#ascii-case-insensitive>`_
-    matching of encoding labels.
-    The same matching is also used, among other things,
-    for `CSS keywords <http://dev.w3.org/csswg/css-values/#keywords>`_.
-
-    This is different from the :meth:`~py:str.lower` method of Unicode strings
-    which also affect non-ASCII characters,
-    sometimes mapping them into the ASCII range:
-
-        >>> keyword = u'Bac\N{KELVIN SIGN}ground'
-        >>> assert keyword.lower() == u'background'
-        >>> assert ascii_lower(keyword) != keyword.lower()
-        >>> assert ascii_lower(keyword) == u'bac\N{KELVIN SIGN}ground'
-
-    """
-    # This turns out to be faster than unicode.translate()
-    return string.encode('utf8').lower().decode('utf8')
-
-
-def lookup(label):
-    """
-    Look for an encoding by its label.
-    This is the spec’s `get an encoding
-    <http://encoding.spec.whatwg.org/#concept-encoding-get>`_ algorithm.
-    Supported labels are listed there.
-
-    :param label: A string.
-    :returns:
-        An :class:`Encoding` object, or :obj:`None` for an unknown label.
-
-    """
-    # Only strip ASCII whitespace: U+0009, U+000A, U+000C, U+000D, and U+0020.
-    label = ascii_lower(label.strip('\t\n\f\r '))
-    name = LABELS.get(label)
-    if name is None:
-        return None
-    encoding = CACHE.get(name)
-    if encoding is None:
-        if name == 'x-user-defined':
-            from .x_user_defined import codec_info
-        else:
-            python_name = PYTHON_NAMES.get(name, name)
-            # Any python_name value that gets to here should be valid.
-            codec_info = codecs.lookup(python_name)
-        encoding = Encoding(name, codec_info)
-        CACHE[name] = encoding
-    return encoding
-
-
-def _get_encoding(encoding_or_label):
-    """
-    Accept either an encoding object or label.
-
-    :param encoding: An :class:`Encoding` object or a label string.
-    :returns: An :class:`Encoding` object.
-    :raises: :exc:`~exceptions.LookupError` for an unknown label.
-
-    """
-    if hasattr(encoding_or_label, 'codec_info'):
-        return encoding_or_label
-
-    encoding = lookup(encoding_or_label)
-    if encoding is None:
-        raise LookupError('Unknown encoding label: %r' % encoding_or_label)
-    return encoding
-
-
-class Encoding(object):
-    """Reresents a character encoding such as UTF-8,
-    that can be used for decoding or encoding.
-
-    .. attribute:: name
-
-        Canonical name of the encoding
-
-    .. attribute:: codec_info
-
-        The actual implementation of the encoding,
-        a stdlib :class:`~codecs.CodecInfo` object.
-        See :func:`codecs.register`.
-
-    """
-    def __init__(self, name, codec_info):
-        self.name = name
-        self.codec_info = codec_info
-
-    def __repr__(self):
-        return '<Encoding %s>' % self.name
-
-
-#: The UTF-8 encoding. Should be used for new content and formats.
-UTF8 = lookup('utf-8')
-
-_UTF16LE = lookup('utf-16le')
-_UTF16BE = lookup('utf-16be')
-
-
-def decode(input, fallback_encoding, errors='replace'):
-    """
-    Decode a single string.
-
-    :param input: A byte string
-    :param fallback_encoding:
-        An :class:`Encoding` object or a label string.
-        The encoding to use if :obj:`input` does note have a BOM.
-    :param errors: Type of error handling. See :func:`codecs.register`.
-    :raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
-    :return:
-        A ``(output, encoding)`` tuple of an Unicode string
-        and an :obj:`Encoding`.
-
-    """
-    # Fail early if `encoding` is an invalid label.
-    fallback_encoding = _get_encoding(fallback_encoding)
-    bom_encoding, input = _detect_bom(input)
-    encoding = bom_encoding or fallback_encoding
-    return encoding.codec_info.decode(input, errors)[0], encoding
-
-
-def _detect_bom(input):
-    """Return (bom_encoding, input), with any BOM removed from the input."""
-    if input.startswith(b'\xFF\xFE'):
-        return _UTF16LE, input[2:]
-    if input.startswith(b'\xFE\xFF'):
-        return _UTF16BE, input[2:]
-    if input.startswith(b'\xEF\xBB\xBF'):
-        return UTF8, input[3:]
-    return None, input
-
-
-def encode(input, encoding=UTF8, errors='strict'):
-    """
-    Encode a single string.
-
-    :param input: An Unicode string.
-    :param encoding: An :class:`Encoding` object or a label string.
-    :param errors: Type of error handling. See :func:`codecs.register`.
-    :raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
-    :return: A byte string.
-
-    """
-    return _get_encoding(encoding).codec_info.encode(input, errors)[0]
-
-
-def iter_decode(input, fallback_encoding, errors='replace'):
-    """
-    "Pull"-based decoder.
-
-    :param input:
-        An iterable of byte strings.
-
-        The input is first consumed just enough to determine the encoding
-        based on the precense of a BOM,
-        then consumed on demand when the return value is.
-    :param fallback_encoding:
-        An :class:`Encoding` object or a label string.
-        The encoding to use if :obj:`input` does note have a BOM.
-    :param errors: Type of error handling. See :func:`codecs.register`.
-    :raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
-    :returns:
-        An ``(output, encoding)`` tuple.
-        :obj:`output` is an iterable of Unicode strings,
-        :obj:`encoding` is the :obj:`Encoding` that is being used.
-
-    """
-
-    decoder = IncrementalDecoder(fallback_encoding, errors)
-    generator = _iter_decode_generator(input, decoder)
-    encoding = next(generator)
-    return generator, encoding
-
-
-def _iter_decode_generator(input, decoder):
-    """Return a generator that first yields the :obj:`Encoding`,
-    then yields output chukns as Unicode strings.
-
-    """
-    decode = decoder.decode
-    input = iter(input)
-    for chunck in input:
-        output = decode(chunck)
-        if output:
-            assert decoder.encoding is not None
-            yield decoder.encoding
-            yield output
-            break
-    else:
-        # Input exhausted without determining the encoding
-        output = decode(b'', final=True)
-        assert decoder.encoding is not None
-        yield decoder.encoding
-        if output:
-            yield output
-        return
-
-    for chunck in input:
-        output = decode(chunck)
-        if output:
-            yield output
-    output = decode(b'', final=True)
-    if output:
-        yield output
-
-
-def iter_encode(input, encoding=UTF8, errors='strict'):
-    """
-    “Pull”-based encoder.
-
-    :param input: An iterable of Unicode strings.
-    :param encoding: An :class:`Encoding` object or a label string.
-    :param errors: Type of error handling. See :func:`codecs.register`.
-    :raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
-    :returns: An iterable of byte strings.
-
-    """
-    # Fail early if `encoding` is an invalid label.
-    encode = IncrementalEncoder(encoding, errors).encode
-    return _iter_encode_generator(input, encode)
-
-
-def _iter_encode_generator(input, encode):
-    for chunck in input:
-        output = encode(chunck)
-        if output:
-            yield output
-    output = encode('', final=True)
-    if output:
-        yield output
-
-
-class IncrementalDecoder(object):
-    """
-    “Push”-based decoder.
-
-    :param fallback_encoding:
-        An :class:`Encoding` object or a label string.
-        The encoding to use if :obj:`input` does note have a BOM.
-    :param errors: Type of error handling. See :func:`codecs.register`.
-    :raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
-
-    """
-    def __init__(self, fallback_encoding, errors='replace'):
-        # Fail early if `encoding` is an invalid label.
-        self._fallback_encoding = _get_encoding(fallback_encoding)
-        self._errors = errors
-        self._buffer = b''
-        self._decoder = None
-        #: The actual :class:`Encoding` that is being used,
-        #: or :obj:`None` if that is not determined yet.
-        #: (Ie. if there is not enough input yet to determine
-        #: if there is a BOM.)
-        self.encoding = None  # Not known yet.
-
-    def decode(self, input, final=False):
-        """Decode one chunk of the input.
-
-        :param input: A byte string.
-        :param final:
-            Indicate that no more input is available.
-            Must be :obj:`True` if this is the last call.
-        :returns: An Unicode string.
-
-        """
-        decoder = self._decoder
-        if decoder is not None:
-            return decoder(input, final)
-
-        input = self._buffer + input
-        encoding, input = _detect_bom(input)
-        if encoding is None:
-            if len(input) < 3 and not final:  # Not enough data yet.
-                self._buffer = input
-                return ''
-            else:  # No BOM
-                encoding = self._fallback_encoding
-        decoder = encoding.codec_info.incrementaldecoder(self._errors).decode
-        self._decoder = decoder
-        self.encoding = encoding
-        return decoder(input, final)
-
-
-class IncrementalEncoder(object):
-    """
-    “Push”-based encoder.
-
-    :param encoding: An :class:`Encoding` object or a label string.
-    :param errors: Type of error handling. See :func:`codecs.register`.
-    :raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
-
-    .. method:: encode(input, final=False)
-
-        :param input: An Unicode string.
-        :param final:
-            Indicate that no more input is available.
-            Must be :obj:`True` if this is the last call.
-        :returns: A byte string.
-
-    """
-    def __init__(self, encoding=UTF8, errors='strict'):
-        encoding = _get_encoding(encoding)
-        self.encode = encoding.codec_info.incrementalencoder(errors).encode
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/webencodings/labels.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/webencodings/labels.py
deleted file mode 100644
index 29cbf91..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/webencodings/labels.py
+++ /dev/null
@@ -1,231 +0,0 @@
-"""
-
-    webencodings.labels
-    ~~~~~~~~~~~~~~~~~~~
-
-    Map encoding labels to their name.
-
-    :copyright: Copyright 2012 by Simon Sapin
-    :license: BSD, see LICENSE for details.
-
-"""
-
-# XXX Do not edit!
-# This file is automatically generated by mklabels.py
-
-LABELS = {
-    'unicode-1-1-utf-8':   'utf-8',
-    'utf-8':               'utf-8',
-    'utf8':                'utf-8',
-    '866':                 'ibm866',
-    'cp866':               'ibm866',
-    'csibm866':            'ibm866',
-    'ibm866':              'ibm866',
-    'csisolatin2':         'iso-8859-2',
-    'iso-8859-2':          'iso-8859-2',
-    'iso-ir-101':          'iso-8859-2',
-    'iso8859-2':           'iso-8859-2',
-    'iso88592':            'iso-8859-2',
-    'iso_8859-2':          'iso-8859-2',
-    'iso_8859-2:1987':     'iso-8859-2',
-    'l2':                  'iso-8859-2',
-    'latin2':              'iso-8859-2',
-    'csisolatin3':         'iso-8859-3',
-    'iso-8859-3':          'iso-8859-3',
-    'iso-ir-109':          'iso-8859-3',
-    'iso8859-3':           'iso-8859-3',
-    'iso88593':            'iso-8859-3',
-    'iso_8859-3':          'iso-8859-3',
-    'iso_8859-3:1988':     'iso-8859-3',
-    'l3':                  'iso-8859-3',
-    'latin3':              'iso-8859-3',
-    'csisolatin4':         'iso-8859-4',
-    'iso-8859-4':          'iso-8859-4',
-    'iso-ir-110':          'iso-8859-4',
-    'iso8859-4':           'iso-8859-4',
-    'iso88594':            'iso-8859-4',
-    'iso_8859-4':          'iso-8859-4',
-    'iso_8859-4:1988':     'iso-8859-4',
-    'l4':                  'iso-8859-4',
-    'latin4':              'iso-8859-4',
-    'csisolatincyrillic':  'iso-8859-5',
-    'cyrillic':            'iso-8859-5',
-    'iso-8859-5':          'iso-8859-5',
-    'iso-ir-144':          'iso-8859-5',
-    'iso8859-5':           'iso-8859-5',
-    'iso88595':            'iso-8859-5',
-    'iso_8859-5':          'iso-8859-5',
-    'iso_8859-5:1988':     'iso-8859-5',
-    'arabic':              'iso-8859-6',
-    'asmo-708':            'iso-8859-6',
-    'csiso88596e':         'iso-8859-6',
-    'csiso88596i':         'iso-8859-6',
-    'csisolatinarabic':    'iso-8859-6',
-    'ecma-114':            'iso-8859-6',
-    'iso-8859-6':          'iso-8859-6',
-    'iso-8859-6-e':        'iso-8859-6',
-    'iso-8859-6-i':        'iso-8859-6',
-    'iso-ir-127':          'iso-8859-6',
-    'iso8859-6':           'iso-8859-6',
-    'iso88596':            'iso-8859-6',
-    'iso_8859-6':          'iso-8859-6',
-    'iso_8859-6:1987':     'iso-8859-6',
-    'csisolatingreek':     'iso-8859-7',
-    'ecma-118':            'iso-8859-7',
-    'elot_928':            'iso-8859-7',
-    'greek':               'iso-8859-7',
-    'greek8':              'iso-8859-7',
-    'iso-8859-7':          'iso-8859-7',
-    'iso-ir-126':          'iso-8859-7',
-    'iso8859-7':           'iso-8859-7',
-    'iso88597':            'iso-8859-7',
-    'iso_8859-7':          'iso-8859-7',
-    'iso_8859-7:1987':     'iso-8859-7',
-    'sun_eu_greek':        'iso-8859-7',
-    'csiso88598e':         'iso-8859-8',
-    'csisolatinhebrew':    'iso-8859-8',
-    'hebrew':              'iso-8859-8',
-    'iso-8859-8':          'iso-8859-8',
-    'iso-8859-8-e':        'iso-8859-8',
-    'iso-ir-138':          'iso-8859-8',
-    'iso8859-8':           'iso-8859-8',
-    'iso88598':            'iso-8859-8',
-    'iso_8859-8':          'iso-8859-8',
-    'iso_8859-8:1988':     'iso-8859-8',
-    'visual':              'iso-8859-8',
-    'csiso88598i':         'iso-8859-8-i',
-    'iso-8859-8-i':        'iso-8859-8-i',
-    'logical':             'iso-8859-8-i',
-    'csisolatin6':         'iso-8859-10',
-    'iso-8859-10':         'iso-8859-10',
-    'iso-ir-157':          'iso-8859-10',
-    'iso8859-10':          'iso-8859-10',
-    'iso885910':           'iso-8859-10',
-    'l6':                  'iso-8859-10',
-    'latin6':              'iso-8859-10',
-    'iso-8859-13':         'iso-8859-13',
-    'iso8859-13':          'iso-8859-13',
-    'iso885913':           'iso-8859-13',
-    'iso-8859-14':         'iso-8859-14',
-    'iso8859-14':          'iso-8859-14',
-    'iso885914':           'iso-8859-14',
-    'csisolatin9':         'iso-8859-15',
-    'iso-8859-15':         'iso-8859-15',
-    'iso8859-15':          'iso-8859-15',
-    'iso885915':           'iso-8859-15',
-    'iso_8859-15':         'iso-8859-15',
-    'l9':                  'iso-8859-15',
-    'iso-8859-16':         'iso-8859-16',
-    'cskoi8r':             'koi8-r',
-    'koi':                 'koi8-r',
-    'koi8':                'koi8-r',
-    'koi8-r':              'koi8-r',
-    'koi8_r':              'koi8-r',
-    'koi8-u':              'koi8-u',
-    'csmacintosh':         'macintosh',
-    'mac':                 'macintosh',
-    'macintosh':           'macintosh',
-    'x-mac-roman':         'macintosh',
-    'dos-874':             'windows-874',
-    'iso-8859-11':         'windows-874',
-    'iso8859-11':          'windows-874',
-    'iso885911':           'windows-874',
-    'tis-620':             'windows-874',
-    'windows-874':         'windows-874',
-    'cp1250':              'windows-1250',
-    'windows-1250':        'windows-1250',
-    'x-cp1250':            'windows-1250',
-    'cp1251':              'windows-1251',
-    'windows-1251':        'windows-1251',
-    'x-cp1251':            'windows-1251',
-    'ansi_x3.4-1968':      'windows-1252',
-    'ascii':               'windows-1252',
-    'cp1252':              'windows-1252',
-    'cp819':               'windows-1252',
-    'csisolatin1':         'windows-1252',
-    'ibm819':              'windows-1252',
-    'iso-8859-1':          'windows-1252',
-    'iso-ir-100':          'windows-1252',
-    'iso8859-1':           'windows-1252',
-    'iso88591':            'windows-1252',
-    'iso_8859-1':          'windows-1252',
-    'iso_8859-1:1987':     'windows-1252',
-    'l1':                  'windows-1252',
-    'latin1':              'windows-1252',
-    'us-ascii':            'windows-1252',
-    'windows-1252':        'windows-1252',
-    'x-cp1252':            'windows-1252',
-    'cp1253':              'windows-1253',
-    'windows-1253':        'windows-1253',
-    'x-cp1253':            'windows-1253',
-    'cp1254':              'windows-1254',
-    'csisolatin5':         'windows-1254',
-    'iso-8859-9':          'windows-1254',
-    'iso-ir-148':          'windows-1254',
-    'iso8859-9':           'windows-1254',
-    'iso88599':            'windows-1254',
-    'iso_8859-9':          'windows-1254',
-    'iso_8859-9:1989':     'windows-1254',
-    'l5':                  'windows-1254',
-    'latin5':              'windows-1254',
-    'windows-1254':        'windows-1254',
-    'x-cp1254':            'windows-1254',
-    'cp1255':              'windows-1255',
-    'windows-1255':        'windows-1255',
-    'x-cp1255':            'windows-1255',
-    'cp1256':              'windows-1256',
-    'windows-1256':        'windows-1256',
-    'x-cp1256':            'windows-1256',
-    'cp1257':              'windows-1257',
-    'windows-1257':        'windows-1257',
-    'x-cp1257':            'windows-1257',
-    'cp1258':              'windows-1258',
-    'windows-1258':        'windows-1258',
-    'x-cp1258':            'windows-1258',
-    'x-mac-cyrillic':      'x-mac-cyrillic',
-    'x-mac-ukrainian':     'x-mac-cyrillic',
-    'chinese':             'gbk',
-    'csgb2312':            'gbk',
-    'csiso58gb231280':     'gbk',
-    'gb2312':              'gbk',
-    'gb_2312':             'gbk',
-    'gb_2312-80':          'gbk',
-    'gbk':                 'gbk',
-    'iso-ir-58':           'gbk',
-    'x-gbk':               'gbk',
-    'gb18030':             'gb18030',
-    'hz-gb-2312':          'hz-gb-2312',
-    'big5':                'big5',
-    'big5-hkscs':          'big5',
-    'cn-big5':             'big5',
-    'csbig5':              'big5',
-    'x-x-big5':            'big5',
-    'cseucpkdfmtjapanese': 'euc-jp',
-    'euc-jp':              'euc-jp',
-    'x-euc-jp':            'euc-jp',
-    'csiso2022jp':         'iso-2022-jp',
-    'iso-2022-jp':         'iso-2022-jp',
-    'csshiftjis':          'shift_jis',
-    'ms_kanji':            'shift_jis',
-    'shift-jis':           'shift_jis',
-    'shift_jis':           'shift_jis',
-    'sjis':                'shift_jis',
-    'windows-31j':         'shift_jis',
-    'x-sjis':              'shift_jis',
-    'cseuckr':             'euc-kr',
-    'csksc56011987':       'euc-kr',
-    'euc-kr':              'euc-kr',
-    'iso-ir-149':          'euc-kr',
-    'korean':              'euc-kr',
-    'ks_c_5601-1987':      'euc-kr',
-    'ks_c_5601-1989':      'euc-kr',
-    'ksc5601':             'euc-kr',
-    'ksc_5601':            'euc-kr',
-    'windows-949':         'euc-kr',
-    'csiso2022kr':         'iso-2022-kr',
-    'iso-2022-kr':         'iso-2022-kr',
-    'utf-16be':            'utf-16be',
-    'utf-16':              'utf-16le',
-    'utf-16le':            'utf-16le',
-    'x-user-defined':      'x-user-defined',
-}
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/webencodings/mklabels.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/webencodings/mklabels.py
deleted file mode 100644
index 295dc92..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/webencodings/mklabels.py
+++ /dev/null
@@ -1,59 +0,0 @@
-"""
-
-    webencodings.mklabels
-    ~~~~~~~~~~~~~~~~~~~~~
-
-    Regenarate the webencodings.labels module.
-
-    :copyright: Copyright 2012 by Simon Sapin
-    :license: BSD, see LICENSE for details.
-
-"""
-
-import json
-try:
-    from urllib import urlopen
-except ImportError:
-    from urllib.request import urlopen
-
-
-def assert_lower(string):
-    assert string == string.lower()
-    return string
-
-
-def generate(url):
-    parts = ['''\
-"""
-
-    webencodings.labels
-    ~~~~~~~~~~~~~~~~~~~
-
-    Map encoding labels to their name.
-
-    :copyright: Copyright 2012 by Simon Sapin
-    :license: BSD, see LICENSE for details.
-
-"""
-
-# XXX Do not edit!
-# This file is automatically generated by mklabels.py
-
-LABELS = {
-''']
-    labels = [
-        (repr(assert_lower(label)).lstrip('u'),
-         repr(encoding['name']).lstrip('u'))
-        for category in json.loads(urlopen(url).read().decode('ascii'))
-        for encoding in category['encodings']
-        for label in encoding['labels']]
-    max_len = max(len(label) for label, name in labels)
-    parts.extend(
-        '    %s:%s %s,\n' % (label, ' ' * (max_len - len(label)), name)
-        for label, name in labels)
-    parts.append('}')
-    return ''.join(parts)
-
-
-if __name__ == '__main__':
-    print(generate('http://encoding.spec.whatwg.org/encodings.json'))
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/webencodings/tests.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/webencodings/tests.py
deleted file mode 100644
index e12c10d..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/webencodings/tests.py
+++ /dev/null
@@ -1,153 +0,0 @@
-# coding: utf-8
-"""
-
-    webencodings.tests
-    ~~~~~~~~~~~~~~~~~~
-
-    A basic test suite for Encoding.
-
-    :copyright: Copyright 2012 by Simon Sapin
-    :license: BSD, see LICENSE for details.
-
-"""
-
-from __future__ import unicode_literals
-
-from . import (lookup, LABELS, decode, encode, iter_decode, iter_encode,
-               IncrementalDecoder, IncrementalEncoder, UTF8)
-
-
-def assert_raises(exception, function, *args, **kwargs):
-    try:
-        function(*args, **kwargs)
-    except exception:
-        return
-    else:  # pragma: no cover
-        raise AssertionError('Did not raise %s.' % exception)
-
-
-def test_labels():
-    assert lookup('utf-8').name == 'utf-8'
-    assert lookup('Utf-8').name == 'utf-8'
-    assert lookup('UTF-8').name == 'utf-8'
-    assert lookup('utf8').name == 'utf-8'
-    assert lookup('utf8').name == 'utf-8'
-    assert lookup('utf8 ').name == 'utf-8'
-    assert lookup(' \r\nutf8\t').name == 'utf-8'
-    assert lookup('u8') is None  # Python label.
-    assert lookup('utf-8 ') is None  # Non-ASCII white space.
-
-    assert lookup('US-ASCII').name == 'windows-1252'
-    assert lookup('iso-8859-1').name == 'windows-1252'
-    assert lookup('latin1').name == 'windows-1252'
-    assert lookup('LATIN1').name == 'windows-1252'
-    assert lookup('latin-1') is None
-    assert lookup('LATİN1') is None  # ASCII-only case insensitivity.
-
-
-def test_all_labels():
-    for label in LABELS:
-        assert decode(b'', label) == ('', lookup(label))
-        assert encode('', label) == b''
-        for repeat in [0, 1, 12]:
-            output, _ = iter_decode([b''] * repeat, label)
-            assert list(output) == []
-            assert list(iter_encode([''] * repeat, label)) == []
-        decoder = IncrementalDecoder(label)
-        assert decoder.decode(b'') == ''
-        assert decoder.decode(b'', final=True) == ''
-        encoder = IncrementalEncoder(label)
-        assert encoder.encode('') == b''
-        assert encoder.encode('', final=True) == b''
-    # All encoding names are valid labels too:
-    for name in set(LABELS.values()):
-        assert lookup(name).name == name
-
-
-def test_invalid_label():
-    assert_raises(LookupError, decode, b'\xEF\xBB\xBF\xc3\xa9', 'invalid')
-    assert_raises(LookupError, encode, 'é', 'invalid')
-    assert_raises(LookupError, iter_decode, [], 'invalid')
-    assert_raises(LookupError, iter_encode, [], 'invalid')
-    assert_raises(LookupError, IncrementalDecoder, 'invalid')
-    assert_raises(LookupError, IncrementalEncoder, 'invalid')
-
-
-def test_decode():
-    assert decode(b'\x80', 'latin1') == ('€', lookup('latin1'))
-    assert decode(b'\x80', lookup('latin1')) == ('€', lookup('latin1'))
-    assert decode(b'\xc3\xa9', 'utf8') == ('é', lookup('utf8'))
-    assert decode(b'\xc3\xa9', UTF8) == ('é', lookup('utf8'))
-    assert decode(b'\xc3\xa9', 'ascii') == ('é', lookup('ascii'))
-    assert decode(b'\xEF\xBB\xBF\xc3\xa9', 'ascii') == ('é', lookup('utf8'))  # UTF-8 with BOM
-
-    assert decode(b'\xFE\xFF\x00\xe9', 'ascii') == ('é', lookup('utf-16be'))  # UTF-16-BE with BOM
-    assert decode(b'\xFF\xFE\xe9\x00', 'ascii') == ('é', lookup('utf-16le'))  # UTF-16-LE with BOM
-    assert decode(b'\xFE\xFF\xe9\x00', 'ascii') == ('\ue900', lookup('utf-16be'))
-    assert decode(b'\xFF\xFE\x00\xe9', 'ascii') == ('\ue900', lookup('utf-16le'))
-
-    assert decode(b'\x00\xe9', 'UTF-16BE') == ('é', lookup('utf-16be'))
-    assert decode(b'\xe9\x00', 'UTF-16LE') == ('é', lookup('utf-16le'))
-    assert decode(b'\xe9\x00', 'UTF-16') == ('é', lookup('utf-16le'))
-
-    assert decode(b'\xe9\x00', 'UTF-16BE') == ('\ue900', lookup('utf-16be'))
-    assert decode(b'\x00\xe9', 'UTF-16LE') == ('\ue900', lookup('utf-16le'))
-    assert decode(b'\x00\xe9', 'UTF-16') == ('\ue900', lookup('utf-16le'))
-
-
-def test_encode():
-    assert encode('é', 'latin1') == b'\xe9'
-    assert encode('é', 'utf8') == b'\xc3\xa9'
-    assert encode('é', 'utf8') == b'\xc3\xa9'
-    assert encode('é', 'utf-16') == b'\xe9\x00'
-    assert encode('é', 'utf-16le') == b'\xe9\x00'
-    assert encode('é', 'utf-16be') == b'\x00\xe9'
-
-
-def test_iter_decode():
-    def iter_decode_to_string(input, fallback_encoding):
-        output, _encoding = iter_decode(input, fallback_encoding)
-        return ''.join(output)
-    assert iter_decode_to_string([], 'latin1') == ''
-    assert iter_decode_to_string([b''], 'latin1') == ''
-    assert iter_decode_to_string([b'\xe9'], 'latin1') == 'é'
-    assert iter_decode_to_string([b'hello'], 'latin1') == 'hello'
-    assert iter_decode_to_string([b'he', b'llo'], 'latin1') == 'hello'
-    assert iter_decode_to_string([b'hell', b'o'], 'latin1') == 'hello'
-    assert iter_decode_to_string([b'\xc3\xa9'], 'latin1') == 'é'
-    assert iter_decode_to_string([b'\xEF\xBB\xBF\xc3\xa9'], 'latin1') == 'é'
-    assert iter_decode_to_string([
-        b'\xEF\xBB\xBF', b'\xc3', b'\xa9'], 'latin1') == 'é'
-    assert iter_decode_to_string([
-        b'\xEF\xBB\xBF', b'a', b'\xc3'], 'latin1') == 'a\uFFFD'
-    assert iter_decode_to_string([
-        b'', b'\xEF', b'', b'', b'\xBB\xBF\xc3', b'\xa9'], 'latin1') == 'é'
-    assert iter_decode_to_string([b'\xEF\xBB\xBF'], 'latin1') == ''
-    assert iter_decode_to_string([b'\xEF\xBB'], 'latin1') == 'ï»'
-    assert iter_decode_to_string([b'\xFE\xFF\x00\xe9'], 'latin1') == 'é'
-    assert iter_decode_to_string([b'\xFF\xFE\xe9\x00'], 'latin1') == 'é'
-    assert iter_decode_to_string([
-        b'', b'\xFF', b'', b'', b'\xFE\xe9', b'\x00'], 'latin1') == 'é'
-    assert iter_decode_to_string([
-        b'', b'h\xe9', b'llo'], 'x-user-defined') == 'h\uF7E9llo'
-
-
-def test_iter_encode():
-    assert b''.join(iter_encode([], 'latin1')) == b''
-    assert b''.join(iter_encode([''], 'latin1')) == b''
-    assert b''.join(iter_encode(['é'], 'latin1')) == b'\xe9'
-    assert b''.join(iter_encode(['', 'é', '', ''], 'latin1')) == b'\xe9'
-    assert b''.join(iter_encode(['', 'é', '', ''], 'utf-16')) == b'\xe9\x00'
-    assert b''.join(iter_encode(['', 'é', '', ''], 'utf-16le')) == b'\xe9\x00'
-    assert b''.join(iter_encode(['', 'é', '', ''], 'utf-16be')) == b'\x00\xe9'
-    assert b''.join(iter_encode([
-        '', 'h\uF7E9', '', 'llo'], 'x-user-defined')) == b'h\xe9llo'
-
-
-def test_x_user_defined():
-    encoded = b'2,\x0c\x0b\x1aO\xd9#\xcb\x0f\xc9\xbbt\xcf\xa8\xca'
-    decoded = '2,\x0c\x0b\x1aO\uf7d9#\uf7cb\x0f\uf7c9\uf7bbt\uf7cf\uf7a8\uf7ca'
-    encoded = b'aa'
-    decoded = 'aa'
-    assert decode(encoded, 'x-user-defined') == (decoded, lookup('x-user-defined'))
-    assert encode(decoded, 'x-user-defined') == encoded
diff --git a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/webencodings/x_user_defined.py b/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/webencodings/x_user_defined.py
deleted file mode 100644
index d16e326..0000000
--- a/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/webencodings/x_user_defined.py
+++ /dev/null
@@ -1,325 +0,0 @@
-# coding: utf-8
-"""
-
-    webencodings.x_user_defined
-    ~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-    An implementation of the x-user-defined encoding.
-
-    :copyright: Copyright 2012 by Simon Sapin
-    :license: BSD, see LICENSE for details.
-
-"""
-
-from __future__ import unicode_literals
-
-import codecs
-
-
-### Codec APIs
-
-class Codec(codecs.Codec):
-
-    def encode(self, input, errors='strict'):
-        return codecs.charmap_encode(input, errors, encoding_table)
-
-    def decode(self, input, errors='strict'):
-        return codecs.charmap_decode(input, errors, decoding_table)
-
-
-class IncrementalEncoder(codecs.IncrementalEncoder):
-    def encode(self, input, final=False):
-        return codecs.charmap_encode(input, self.errors, encoding_table)[0]
-
-
-class IncrementalDecoder(codecs.IncrementalDecoder):
-    def decode(self, input, final=False):
-        return codecs.charmap_decode(input, self.errors, decoding_table)[0]
-
-
-class StreamWriter(Codec, codecs.StreamWriter):
-    pass
-
-
-class StreamReader(Codec, codecs.StreamReader):
-    pass
-
-
-### encodings module API
-
-codec_info = codecs.CodecInfo(
-    name='x-user-defined',
-    encode=Codec().encode,
-    decode=Codec().decode,
-    incrementalencoder=IncrementalEncoder,
-    incrementaldecoder=IncrementalDecoder,
-    streamreader=StreamReader,
-    streamwriter=StreamWriter,
-)
-
-
-### Decoding Table
-
-# Python 3:
-# for c in range(256): print('    %r' % chr(c if c < 128 else c + 0xF700))
-decoding_table = (
-    '\x00'
-    '\x01'
-    '\x02'
-    '\x03'
-    '\x04'
-    '\x05'
-    '\x06'
-    '\x07'
-    '\x08'
-    '\t'
-    '\n'
-    '\x0b'
-    '\x0c'
-    '\r'
-    '\x0e'
-    '\x0f'
-    '\x10'
-    '\x11'
-    '\x12'
-    '\x13'
-    '\x14'
-    '\x15'
-    '\x16'
-    '\x17'
-    '\x18'
-    '\x19'
-    '\x1a'
-    '\x1b'
-    '\x1c'
-    '\x1d'
-    '\x1e'
-    '\x1f'
-    ' '
-    '!'
-    '"'
-    '#'
-    '$'
-    '%'
-    '&'
-    "'"
-    '('
-    ')'
-    '*'
-    '+'
-    ','
-    '-'
-    '.'
-    '/'
-    '0'
-    '1'
-    '2'
-    '3'
-    '4'
-    '5'
-    '6'
-    '7'
-    '8'
-    '9'
-    ':'
-    ';'
-    '<'
-    '='
-    '>'
-    '?'
-    '@'
-    'A'
-    'B'
-    'C'
-    'D'
-    'E'
-    'F'
-    'G'
-    'H'
-    'I'
-    'J'
-    'K'
-    'L'
-    'M'
-    'N'
-    'O'
-    'P'
-    'Q'
-    'R'
-    'S'
-    'T'
-    'U'
-    'V'
-    'W'
-    'X'
-    'Y'
-    'Z'
-    '['
-    '\\'
-    ']'
-    '^'
-    '_'
-    '`'
-    'a'
-    'b'
-    'c'
-    'd'
-    'e'
-    'f'
-    'g'
-    'h'
-    'i'
-    'j'
-    'k'
-    'l'
-    'm'
-    'n'
-    'o'
-    'p'
-    'q'
-    'r'
-    's'
-    't'
-    'u'
-    'v'
-    'w'
-    'x'
-    'y'
-    'z'
-    '{'
-    '|'
-    '}'
-    '~'
-    '\x7f'
-    '\uf780'
-    '\uf781'
-    '\uf782'
-    '\uf783'
-    '\uf784'
-    '\uf785'
-    '\uf786'
-    '\uf787'
-    '\uf788'
-    '\uf789'
-    '\uf78a'
-    '\uf78b'
-    '\uf78c'
-    '\uf78d'
-    '\uf78e'
-    '\uf78f'
-    '\uf790'
-    '\uf791'
-    '\uf792'
-    '\uf793'
-    '\uf794'
-    '\uf795'
-    '\uf796'
-    '\uf797'
-    '\uf798'
-    '\uf799'
-    '\uf79a'
-    '\uf79b'
-    '\uf79c'
-    '\uf79d'
-    '\uf79e'
-    '\uf79f'
-    '\uf7a0'
-    '\uf7a1'
-    '\uf7a2'
-    '\uf7a3'
-    '\uf7a4'
-    '\uf7a5'
-    '\uf7a6'
-    '\uf7a7'
-    '\uf7a8'
-    '\uf7a9'
-    '\uf7aa'
-    '\uf7ab'
-    '\uf7ac'
-    '\uf7ad'
-    '\uf7ae'
-    '\uf7af'
-    '\uf7b0'
-    '\uf7b1'
-    '\uf7b2'
-    '\uf7b3'
-    '\uf7b4'
-    '\uf7b5'
-    '\uf7b6'
-    '\uf7b7'
-    '\uf7b8'
-    '\uf7b9'
-    '\uf7ba'
-    '\uf7bb'
-    '\uf7bc'
-    '\uf7bd'
-    '\uf7be'
-    '\uf7bf'
-    '\uf7c0'
-    '\uf7c1'
-    '\uf7c2'
-    '\uf7c3'
-    '\uf7c4'
-    '\uf7c5'
-    '\uf7c6'
-    '\uf7c7'
-    '\uf7c8'
-    '\uf7c9'
-    '\uf7ca'
-    '\uf7cb'
-    '\uf7cc'
-    '\uf7cd'
-    '\uf7ce'
-    '\uf7cf'
-    '\uf7d0'
-    '\uf7d1'
-    '\uf7d2'
-    '\uf7d3'
-    '\uf7d4'
-    '\uf7d5'
-    '\uf7d6'
-    '\uf7d7'
-    '\uf7d8'
-    '\uf7d9'
-    '\uf7da'
-    '\uf7db'
-    '\uf7dc'
-    '\uf7dd'
-    '\uf7de'
-    '\uf7df'
-    '\uf7e0'
-    '\uf7e1'
-    '\uf7e2'
-    '\uf7e3'
-    '\uf7e4'
-    '\uf7e5'
-    '\uf7e6'
-    '\uf7e7'
-    '\uf7e8'
-    '\uf7e9'
-    '\uf7ea'
-    '\uf7eb'
-    '\uf7ec'
-    '\uf7ed'
-    '\uf7ee'
-    '\uf7ef'
-    '\uf7f0'
-    '\uf7f1'
-    '\uf7f2'
-    '\uf7f3'
-    '\uf7f4'
-    '\uf7f5'
-    '\uf7f6'
-    '\uf7f7'
-    '\uf7f8'
-    '\uf7f9'
-    '\uf7fa'
-    '\uf7fb'
-    '\uf7fc'
-    '\uf7fd'
-    '\uf7fe'
-    '\uf7ff'
-)
-
-### Encoding table
-encoding_table = codecs.charmap_build(decoding_table)
diff --git a/venv/lib/python3.7/site-packages/pykka/__init__.py b/venv/lib/python3.7/site-packages/pykka/__init__.py
deleted file mode 100644
index 1135b0c..0000000
--- a/venv/lib/python3.7/site-packages/pykka/__init__.py
+++ /dev/null
@@ -1,32 +0,0 @@
-import logging as _logging
-
-from pykka._exceptions import ActorDeadError, Timeout
-from pykka._future import Future, get_all
-from pykka._proxy import ActorProxy, CallableProxy, traversable
-from pykka._ref import ActorRef
-from pykka._registry import ActorRegistry
-from pykka._actor import Actor  # noqa: Must be imported late
-from pykka._threading import ThreadingActor, ThreadingFuture
-
-
-__all__ = [
-    'Actor',
-    'ActorDeadError',
-    'ActorProxy',
-    'ActorRef',
-    'ActorRegistry',
-    'CallableProxy',
-    'Future',
-    'ThreadingActor',
-    'ThreadingFuture',
-    'Timeout',
-    'get_all',
-    'traversable',
-]
-
-
-#: Pykka's :pep:`396` and :pep:`440` compatible version number
-__version__ = '2.0.2'
-
-
-_logging.getLogger('pykka').addHandler(_logging.NullHandler())
diff --git a/venv/lib/python3.7/site-packages/pykka/_actor.py b/venv/lib/python3.7/site-packages/pykka/_actor.py
deleted file mode 100644
index 87c995f..0000000
--- a/venv/lib/python3.7/site-packages/pykka/_actor.py
+++ /dev/null
@@ -1,356 +0,0 @@
-from __future__ import absolute_import
-
-import logging
-import sys
-import threading
-import uuid
-
-from pykka import ActorDeadError, ActorRef, ActorRegistry, messages
-
-
-__all__ = ['Actor']
-
-logger = logging.getLogger('pykka')
-
-
-class Actor(object):
-    """
-    To create an actor:
-
-    1. subclass one of the :class:`Actor` implementations:
-
-       - :class:`~pykka.ThreadingActor`
-       - :class:`~pykka.gevent.GeventActor`
-       - :class:`~pykka.eventlet.EventletActor`
-
-    2. implement your methods, including :meth:`__init__`, as usual,
-    3. call :meth:`Actor.start` on your actor class, passing the method any
-       arguments for your constructor.
-
-    To stop an actor, call :meth:`Actor.stop()` or :meth:`ActorRef.stop()`.
-
-    For example::
-
-        import pykka
-
-        class MyActor(pykka.ThreadingActor):
-            def __init__(self, my_arg=None):
-                super().__init__()
-                ... # My optional init code with access to start() arguments
-
-            def on_start(self):
-                ... # My optional setup code in same context as on_receive()
-
-            def on_stop(self):
-                ... # My optional cleanup code in same context as on_receive()
-
-            def on_failure(self, exception_type, exception_value, traceback):
-                ... # My optional cleanup code in same context as on_receive()
-
-            def on_receive(self, message):
-                ... # My optional message handling code for a plain actor
-
-            def a_method(self, ...):
-                ... # My regular method to be used through an ActorProxy
-
-        my_actor_ref = MyActor.start(my_arg=...)
-        my_actor_ref.stop()
-    """
-
-    @classmethod
-    def start(cls, *args, **kwargs):
-        """
-        Start an actor and register it in the
-        :class:`ActorRegistry <pykka.ActorRegistry>`.
-
-        Any arguments passed to :meth:`start` will be passed on to the class
-        constructor.
-
-        Behind the scenes, the following is happening when you call
-        :meth:`start`:
-
-        1. The actor is created:
-
-           1. :attr:`actor_urn` is initialized with the assigned URN.
-
-           2. :attr:`actor_inbox` is initialized with a new actor inbox.
-
-           3. :attr:`actor_ref` is initialized with a :class:`pykka.ActorRef`
-              object for safely communicating with the actor.
-
-           4. At this point, your :meth:`__init__()` code can run.
-
-        2. The actor is registered in :class:`pykka.ActorRegistry`.
-
-        3. The actor receive loop is started by the actor's associated
-           thread/greenlet.
-
-        :returns: a :class:`ActorRef` which can be used to access the actor in
-            a safe manner
-        """
-        obj = cls(*args, **kwargs)
-        assert obj.actor_ref is not None, (
-            'Actor.__init__() have not been called. '
-            'Did you forget to call super() in your override?'
-        )
-        ActorRegistry.register(obj.actor_ref)
-        logger.debug('Starting {}'.format(obj))
-        obj._start_actor_loop()
-        return obj.actor_ref
-
-    @staticmethod
-    def _create_actor_inbox():
-        """Internal method for implementors of new actor types."""
-        raise NotImplementedError('Use a subclass of Actor')
-
-    @staticmethod
-    def _create_future():
-        """Internal method for implementors of new actor types."""
-        raise NotImplementedError('Use a subclass of Actor')
-
-    def _start_actor_loop(self):
-        """Internal method for implementors of new actor types."""
-        raise NotImplementedError('Use a subclass of Actor')
-
-    #: The actor URN string is a universally unique identifier for the actor.
-    #: It may be used for looking up a specific actor using
-    #: :meth:`ActorRegistry.get_by_urn`.
-    actor_urn = None
-
-    #: The actor's inbox. Use :meth:`ActorRef.tell`, :meth:`ActorRef.ask`, and
-    #: friends to put messages in the inbox.
-    actor_inbox = None
-
-    #: The actor's :class:`ActorRef` instance.
-    actor_ref = None
-
-    #: A :class:`threading.Event` representing whether or not the actor should
-    #: continue processing messages. Use :meth:`stop` to change it.
-    actor_stopped = None
-
-    def __init__(self, *args, **kwargs):
-        """
-        Your are free to override :meth:`__init__`, but you must call your
-        superclass' :meth:`__init__` to ensure that fields :attr:`actor_urn`,
-        :attr:`actor_inbox`, and :attr:`actor_ref` are initialized.
-
-        You can use :func:`super`::
-
-            super().__init__()
-
-        Or call you superclass directly::
-
-            pykka.ThreadingActor.__init__(self)
-            # or
-            pykka.gevent.GeventActor.__init__(self)
-
-        :meth:`__init__` is called before the actor is started and registered
-        in :class:`ActorRegistry <pykka.ActorRegistry>`.
-        """
-        self.actor_urn = uuid.uuid4().urn
-        self.actor_inbox = self._create_actor_inbox()
-        self.actor_stopped = threading.Event()
-
-        self.actor_ref = ActorRef(self)
-
-    def __str__(self):
-        return '{} ({})'.format(self.__class__.__name__, self.actor_urn)
-
-    def stop(self):
-        """
-        Stop the actor.
-
-        It's equivalent to calling :meth:`ActorRef.stop` with ``block=False``.
-        """
-        self.actor_ref.tell(messages._ActorStop())
-
-    def _stop(self):
-        """
-        Stops the actor immediately without processing the rest of the inbox.
-        """
-        ActorRegistry.unregister(self.actor_ref)
-        self.actor_stopped.set()
-        logger.debug('Stopped {}'.format(self))
-        try:
-            self.on_stop()
-        except Exception:
-            self._handle_failure(*sys.exc_info())
-
-    def _actor_loop(self):
-        """
-        The actor's event loop.
-
-        This is the method that will be executed by the thread or greenlet.
-        """
-        try:
-            self.on_start()
-        except Exception:
-            self._handle_failure(*sys.exc_info())
-
-        while not self.actor_stopped.is_set():
-            envelope = self.actor_inbox.get()
-            try:
-                response = self._handle_receive(envelope.message)
-                if envelope.reply_to is not None:
-                    envelope.reply_to.set(response)
-            except Exception:
-                if envelope.reply_to is not None:
-                    logger.info(
-                        'Exception returned from {} to caller:'.format(self),
-                        exc_info=sys.exc_info(),
-                    )
-                    envelope.reply_to.set_exception()
-                else:
-                    self._handle_failure(*sys.exc_info())
-                    try:
-                        self.on_failure(*sys.exc_info())
-                    except Exception:
-                        self._handle_failure(*sys.exc_info())
-            except BaseException:
-                exception_value = sys.exc_info()[1]
-                logger.debug(
-                    '{!r} in {}. Stopping all actors.'.format(
-                        exception_value, self
-                    )
-                )
-                self._stop()
-                ActorRegistry.stop_all()
-
-        while not self.actor_inbox.empty():
-            envelope = self.actor_inbox.get()
-            if envelope.reply_to is not None:
-                if isinstance(envelope.message, messages._ActorStop):
-                    envelope.reply_to.set(None)
-                else:
-                    envelope.reply_to.set_exception(
-                        exc_info=(
-                            ActorDeadError,
-                            ActorDeadError(
-                                '{} stopped before handling the message'.format(
-                                    self.actor_ref
-                                )
-                            ),
-                            None,
-                        )
-                    )
-
-    def on_start(self):
-        """
-        Hook for doing any setup that should be done *after* the actor is
-        started, but *before* it starts processing messages.
-
-        For :class:`ThreadingActor`, this method is executed in the actor's own
-        thread, while :meth:`__init__` is executed in the thread that created
-        the actor.
-
-        If an exception is raised by this method the stack trace will be
-        logged, and the actor will stop.
-        """
-        pass
-
-    def on_stop(self):
-        """
-        Hook for doing any cleanup that should be done *after* the actor has
-        processed the last message, and *before* the actor stops.
-
-        This hook is *not* called when the actor stops because of an unhandled
-        exception. In that case, the :meth:`on_failure` hook is called instead.
-
-        For :class:`ThreadingActor` this method is executed in the actor's own
-        thread, immediately before the thread exits.
-
-        If an exception is raised by this method the stack trace will be
-        logged, and the actor will stop.
-        """
-        pass
-
-    def _handle_failure(self, exception_type, exception_value, traceback):
-        """Logs unexpected failures, unregisters and stops the actor."""
-        logger.error(
-            'Unhandled exception in {}:'.format(self),
-            exc_info=(exception_type, exception_value, traceback),
-        )
-        ActorRegistry.unregister(self.actor_ref)
-        self.actor_stopped.set()
-
-    def on_failure(self, exception_type, exception_value, traceback):
-        """
-        Hook for doing any cleanup *after* an unhandled exception is raised,
-        and *before* the actor stops.
-
-        For :class:`ThreadingActor` this method is executed in the actor's own
-        thread, immediately before the thread exits.
-
-        The method's arguments are the relevant information from
-        :func:`sys.exc_info`.
-
-        If an exception is raised by this method the stack trace will be
-        logged, and the actor will stop.
-        """
-        pass
-
-    def _handle_receive(self, message):
-        """Handles messages sent to the actor."""
-        message = messages._upgrade_internal_message(message)
-        if isinstance(message, messages._ActorStop):
-            return self._stop()
-        if isinstance(message, messages.ProxyCall):
-            callee = self._get_attribute_from_path(message.attr_path)
-            return callee(*message.args, **message.kwargs)
-        if isinstance(message, messages.ProxyGetAttr):
-            attr = self._get_attribute_from_path(message.attr_path)
-            return attr
-        if isinstance(message, messages.ProxySetAttr):
-            parent_attr = self._get_attribute_from_path(message.attr_path[:-1])
-            attr_name = message.attr_path[-1]
-            return setattr(parent_attr, attr_name, message.value)
-        return self.on_receive(message)
-
-    def on_receive(self, message):
-        """
-        May be implemented for the actor to handle regular non-proxy messages.
-
-        :param message: the message to handle
-        :type message: any
-
-        :returns: anything that should be sent as a reply to the sender
-        """
-        logger.warning(
-            'Unexpected message received by {}: {}'.format(self, message)
-        )
-
-    def _get_attribute_from_path(self, attr_path):
-        """
-        Traverses the path and returns the attribute at the end of the path.
-        """
-        attr = self
-        for attr_name in attr_path:
-            attr = getattr(attr, attr_name)
-        return attr
-
-    def _introspect_attribute_from_path(self, attr_path):
-        """Get attribute information from ``__dict__`` on the container."""
-        if not attr_path:
-            return self
-
-        parent = self._get_attribute_from_path(attr_path[:-1])
-        parent_attrs = self._introspect_attributes(parent)
-        attr_name = attr_path[-1]
-
-        try:
-            return parent_attrs[attr_name]
-        except KeyError:
-            raise AttributeError(
-                'type object {!r} has no attribute {!r}'.format(
-                    parent.__class__.__name__, attr_name
-                )
-            )
-
-    def _introspect_attributes(self, obj):
-        """Combine ``__dict__`` from ``obj`` and all its superclasses."""
-        result = {}
-        for cls in reversed(obj.__class__.mro()):
-            result.update(cls.__dict__)
-        if hasattr(obj, '__dict__'):
-            result.update(obj.__dict__)
-        return result
diff --git a/venv/lib/python3.7/site-packages/pykka/_compat/__init__.py b/venv/lib/python3.7/site-packages/pykka/_compat/__init__.py
deleted file mode 100644
index 0f00cf4..0000000
--- a/venv/lib/python3.7/site-packages/pykka/_compat/__init__.py
+++ /dev/null
@@ -1,36 +0,0 @@
-import sys
-
-
-PY2 = sys.version_info[0] == 2
-
-if PY2:
-    import Queue as queue  # noqa
-    from collections import Callable, Iterable  # noqa
-
-    string_types = basestring  # noqa
-
-    def reraise(tp, value, tb=None):
-        exec('raise tp, value, tb')
-
-    await_dunder_future = None
-    await_keyword = None
-
-else:
-    import queue  # noqa
-    from collections.abc import Callable, Iterable  # noqa
-
-    string_types = (str,)
-
-    def reraise(tp, value, tb=None):
-        if value is None:
-            value = tp()
-        if value.__traceback__ is not tb:
-            raise value.with_traceback(tb)
-        raise value
-
-    # `async def` and return inside a generator are syntax errors on Python 2
-    # so these must be hidden behind a conditional import.
-    from pykka._compat.await_py3 import (  # noqa
-        await_dunder_future,
-        await_keyword,
-    )
diff --git a/venv/lib/python3.7/site-packages/pykka/_compat/await_py3.py b/venv/lib/python3.7/site-packages/pykka/_compat/await_py3.py
deleted file mode 100644
index 73fafe8..0000000
--- a/venv/lib/python3.7/site-packages/pykka/_compat/await_py3.py
+++ /dev/null
@@ -1,8 +0,0 @@
-def await_dunder_future(self):
-    yield
-    value = self.get()
-    return value
-
-
-async def await_keyword(val):
-    return await val
diff --git a/venv/lib/python3.7/site-packages/pykka/_envelope.py b/venv/lib/python3.7/site-packages/pykka/_envelope.py
deleted file mode 100644
index 9e19a8e..0000000
--- a/venv/lib/python3.7/site-packages/pykka/_envelope.py
+++ /dev/null
@@ -1,23 +0,0 @@
-class Envelope(object):
-    """
-    Envelope to add metadata to a message.
-
-    This is an internal type and is not part of the public API.
-
-    :param message: the message to send
-    :type message: any
-    :param reply_to: the future to reply to if there is a response
-    :type reply_to: :class:`pykka.Future`
-    """
-
-    # Using slots speeds up envelope creation with ~20%
-    __slots__ = ['message', 'reply_to']
-
-    def __init__(self, message, reply_to=None):
-        self.message = message
-        self.reply_to = reply_to
-
-    def __repr__(self):
-        return 'Envelope(message={!r}, reply_to={!r})'.format(
-            self.message, self.reply_to
-        )
diff --git a/venv/lib/python3.7/site-packages/pykka/_exceptions.py b/venv/lib/python3.7/site-packages/pykka/_exceptions.py
deleted file mode 100644
index 8523ca0..0000000
--- a/venv/lib/python3.7/site-packages/pykka/_exceptions.py
+++ /dev/null
@@ -1,13 +0,0 @@
-__all__ = ['ActorDeadError', 'Timeout']
-
-
-class ActorDeadError(Exception):
-    """Exception raised when trying to use a dead or unavailable actor."""
-
-    pass
-
-
-class Timeout(Exception):
-    """Exception raised at future timeout."""
-
-    pass
diff --git a/venv/lib/python3.7/site-packages/pykka/_future.py b/venv/lib/python3.7/site-packages/pykka/_future.py
deleted file mode 100644
index 50b892d..0000000
--- a/venv/lib/python3.7/site-packages/pykka/_future.py
+++ /dev/null
@@ -1,264 +0,0 @@
-import functools
-
-from pykka import _compat
-
-
-__all__ = ['Future', 'get_all']
-
-
-class Future(object):
-    """
-    A :class:`Future` is a handle to a value which is available or will be
-    available in the future.
-
-    Typically returned by calls to actor methods or accesses to actor fields.
-
-    To get hold of the encapsulated value, call :meth:`Future.get` or, if
-    using Python 3.5+, ``await`` the future.
-    """
-
-    def __init__(self):
-        super(Future, self).__init__()
-        self._get_hook = None
-        self._get_hook_result = None
-
-    def get(self, timeout=None):
-        """
-        Get the value encapsulated by the future.
-
-        If the encapsulated value is an exception, it is raised instead of
-        returned.
-
-        If ``timeout`` is :class:`None`, as default, the method will block
-        until it gets a reply, potentially forever. If ``timeout`` is an
-        integer or float, the method will wait for a reply for ``timeout``
-        seconds, and then raise :exc:`pykka.Timeout`.
-
-        The encapsulated value can be retrieved multiple times. The future will
-        only block the first time the value is accessed.
-
-        :param timeout: seconds to wait before timeout
-        :type timeout: float or :class:`None`
-
-        :raise: :exc:`pykka.Timeout` if timeout is reached
-        :raise: encapsulated value if it is an exception
-        :return: encapsulated value if it is not an exception
-        """
-        if self._get_hook is not None:
-            if self._get_hook_result is None:
-                self._get_hook_result = self._get_hook(timeout)
-            return self._get_hook_result
-        raise NotImplementedError
-
-    def set(self, value=None):
-        """
-        Set the encapsulated value.
-
-        :param value: the encapsulated value or nothing
-        :type value: any object or :class:`None`
-        :raise: an exception if set is called multiple times
-        """
-        raise NotImplementedError
-
-    def set_exception(self, exc_info=None):
-        """
-        Set an exception as the encapsulated value.
-
-        You can pass an ``exc_info`` three-tuple, as returned by
-        :func:`sys.exc_info`. If you don't pass ``exc_info``,
-        :func:`sys.exc_info` will be called and the value returned by it used.
-
-        In other words, if you're calling :meth:`set_exception`, without any
-        arguments, from an except block, the exception you're currently
-        handling will automatically be set on the future.
-
-        :param exc_info: the encapsulated exception
-        :type exc_info: three-tuple of (exc_class, exc_instance, traceback)
-        """
-        raise NotImplementedError
-
-    def set_get_hook(self, func):
-        """
-        Set a function to be executed when :meth:`get` is called.
-
-        The function will be called when :meth:`get` is called, with the
-        ``timeout`` value as the only argument. The function's return value
-        will be returned from :meth:`get`.
-
-        .. versionadded:: 1.2
-
-        :param func: called to produce return value of :meth:`get`
-        :type func: function accepting a timeout value
-        """
-        self._get_hook = func
-
-    def filter(self, func):
-        """
-        Return a new future with only the items passing the predicate function.
-
-        If the future's value is an iterable, :meth:`filter` will return a new
-        future whose value is another iterable with only the items from the
-        first iterable for which ``func(item)`` is true. If the future's value
-        isn't an iterable, a :exc:`TypeError` will be raised when :meth:`get`
-        is called.
-
-        Example::
-
-            >>> import pykka
-            >>> f = pykka.ThreadingFuture()
-            >>> g = f.filter(lambda x: x > 10)
-            >>> g
-            <pykka.future.ThreadingFuture at ...>
-            >>> f.set(range(5, 15))
-            >>> f.get()
-            [5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
-            >>> g.get()
-            [11, 12, 13, 14]
-
-        .. versionadded:: 1.2
-        """
-        future = self.__class__()
-        future.set_get_hook(
-            lambda timeout: list(filter(func, self.get(timeout)))
-        )
-        return future
-
-    def join(self, *futures):
-        """
-        Return a new future with a list of the result of multiple futures.
-
-        One or more futures can be passed as arguments to :meth:`join`. The new
-        future returns a list with the results from all the joined futures.
-
-        Example::
-
-            >>> import pykka
-            >>> a = pykka.ThreadingFuture()
-            >>> b = pykka.ThreadingFuture()
-            >>> c = pykka.ThreadingFuture()
-            >>> f = a.join(b, c)
-            >>> a.set('def')
-            >>> b.set(123)
-            >>> c.set(False)
-            >>> f.get()
-            ['def', 123, False]
-
-        .. versionadded:: 1.2
-        """
-        future = self.__class__()
-        future.set_get_hook(
-            lambda timeout: [f.get(timeout) for f in [self] + list(futures)]
-        )
-        return future
-
-    def map(self, func):
-        """
-        Return a new future with the result of the future passed through a
-        function.
-
-        Example::
-
-            >>> import pykka
-            >>> f = pykka.ThreadingFuture()
-            >>> g = f.map(lambda x: x + 10)
-            >>> f.set(30)
-            >>> g.get()
-            40
-
-            >>> f = pykka.ThreadingFuture()
-            >>> g = f.map(lambda x: x['foo'])
-            >>> f.set({'foo': 'bar'}})
-            >>> g.get()
-            'bar'
-
-        .. versionadded:: 1.2
-
-        .. versionchanged:: 2.0
-            Previously, if the future's result was an iterable (except a
-            string), the function was applied to each item in the iterable.
-            This behavior is unpredictable and makes regular use cases like
-            extracting a single field from a dict difficult, thus the
-            behavior has been simplified. Now, the entire result value is
-            passed to the function.
-        """
-        future = self.__class__()
-        future.set_get_hook(lambda timeout: func(self.get(timeout)))
-        return future
-
-    def reduce(self, func, *args):
-        """
-        reduce(func[, initial])
-
-        Return a new future with the result of reducing the future's iterable
-        into a single value.
-
-        The function of two arguments is applied cumulatively to the items of
-        the iterable, from left to right. The result of the first function call
-        is used as the first argument to the second function call, and so on,
-        until the end of the iterable. If the future's value isn't an iterable,
-        a :exc:`TypeError` is raised.
-
-        :meth:`reduce` accepts an optional second argument, which will be used
-        as an initial value in the first function call. If the iterable is
-        empty, the initial value is returned.
-
-        Example::
-
-            >>> import pykka
-            >>> f = pykka.ThreadingFuture()
-            >>> g = f.reduce(lambda x, y: x + y)
-            >>> f.set(['a', 'b', 'c'])
-            >>> g.get()
-            'abc'
-
-            >>> f = pykka.ThreadingFuture()
-            >>> g = f.reduce(lambda x, y: x + y)
-            >>> f.set([1, 2, 3])
-            >>> (1 + 2) + 3
-            6
-            >>> g.get()
-            6
-
-            >>> f = pykka.ThreadingFuture()
-            >>> g = f.reduce(lambda x, y: x + y, 5)
-            >>> f.set([1, 2, 3])
-            >>> ((5 + 1) + 2) + 3
-            11
-            >>> g.get()
-            11
-
-            >>> f = pykka.ThreadingFuture()
-            >>> g = f.reduce(lambda x, y: x + y, 5)
-            >>> f.set([])
-            >>> g.get()
-            5
-
-        .. versionadded:: 1.2
-        """
-        future = self.__class__()
-        future.set_get_hook(
-            lambda timeout: functools.reduce(func, self.get(timeout), *args)
-        )
-        return future
-
-    __await__ = _compat.await_dunder_future
-    __iter__ = __await__
-
-
-def get_all(futures, timeout=None):
-    """
-    Collect all values encapsulated in the list of futures.
-
-    If ``timeout`` is not :class:`None`, the method will wait for a reply for
-    ``timeout`` seconds, and then raise :exc:`pykka.Timeout`.
-
-    :param futures: futures for the results to collect
-    :type futures: list of :class:`pykka.Future`
-
-    :param timeout: seconds to wait before timeout
-    :type timeout: float or :class:`None`
-
-    :raise: :exc:`pykka.Timeout` if timeout is reached
-    :returns: list of results
-    """
-    return [future.get(timeout=timeout) for future in futures]
diff --git a/venv/lib/python3.7/site-packages/pykka/_proxy.py b/venv/lib/python3.7/site-packages/pykka/_proxy.py
deleted file mode 100644
index 843b839..0000000
--- a/venv/lib/python3.7/site-packages/pykka/_proxy.py
+++ /dev/null
@@ -1,357 +0,0 @@
-from __future__ import absolute_import
-
-import logging
-
-from pykka import ActorDeadError, _compat, messages
-
-
-__all__ = ['ActorProxy']
-
-logger = logging.getLogger('pykka')
-
-
-class ActorProxy(object):
-    """
-    An :class:`ActorProxy` wraps an :class:`ActorRef <pykka.ActorRef>`
-    instance. The proxy allows the referenced actor to be used through regular
-    method calls and field access.
-
-    You can create an :class:`ActorProxy` from any :class:`ActorRef
-    <pykka.ActorRef>`::
-
-        actor_ref = MyActor.start()
-        actor_proxy = ActorProxy(actor_ref)
-
-    You can also get an :class:`ActorProxy` by using :meth:`proxy()
-    <pykka.ActorRef.proxy>`::
-
-        actor_proxy = MyActor.start().proxy()
-
-    **Attributes and method calls**
-
-    When reading an attribute or getting a return value from a method, you get
-    a :class:`Future <pykka.Future>` object back. To get the enclosed value
-    from the future, you must call :meth:`get() <pykka.Future.get>` on the
-    returned future::
-
-        print(actor_proxy.string_attribute.get())
-        print(actor_proxy.count().get() + 1)
-
-    If you call a method just for it's side effects and do not care about the
-    return value, you do not need to accept the returned future or call
-    :meth:`get() <pykka.Future.get>` on the future. Simply call the method, and
-    it will be executed concurrently with your own code::
-
-        actor_proxy.method_with_side_effect()
-
-    If you want to block your own code from continuing while the other method
-    is processing, you can use :meth:`get() <pykka.Future.get>` to block until
-    it completes::
-
-        actor_proxy.method_with_side_effect().get()
-
-    If you're using Python 3.5+, you can also use the ``await`` keyword to
-    block until the method completes::
-
-        await actor_proxy.method_with_side_effect()
-
-    If you access a proxied method as an attribute, without calling it, you
-    get an :class:`CallableProxy`.
-
-    **Proxy to itself**
-
-    An actor can use a proxy to itself to schedule work for itself. The
-    scheduled work will only be done after the current message and all messages
-    already in the inbox are processed.
-
-    For example, if an actor can split a time consuming task into multiple
-    parts, and after completing each part can ask itself to start on the next
-    part using proxied calls or messages to itself, it can react faster to
-    other incoming messages as they will be interleaved with the parts of the
-    time consuming task. This is especially useful for being able to stop the
-    actor in the middle of a time consuming task.
-
-    To create a proxy to yourself, use the actor's :attr:`actor_ref
-    <pykka.Actor.actor_ref>` attribute::
-
-        proxy_to_myself_in_the_future = self.actor_ref.proxy()
-
-    If you create a proxy in your actor's constructor or :meth:`on_start
-    <pykka.Actor.on_start>` method, you can create a nice API for deferring
-    work to yourself in the future::
-
-        def __init__(self):
-            ...
-            self._in_future = self.actor_ref.proxy()
-            ...
-
-        def do_work(self):
-            ...
-            self._in_future.do_more_work()
-            ...
-
-        def do_more_work(self):
-            ...
-
-    To avoid infinite loops during proxy introspection, proxies to self
-    should be kept as private instance attributes by prefixing the attribute
-    name with ``_``.
-
-    **Examples**
-
-    An example of :class:`ActorProxy` usage:
-
-    .. literalinclude:: ../../examples/counter.py
-
-    :param actor_ref: reference to the actor to proxy
-    :type actor_ref: :class:`pykka.ActorRef`
-
-    :raise: :exc:`pykka.ActorDeadError` if actor is not available
-    """
-
-    #: The actor's :class:`pykka.ActorRef` instance.
-    actor_ref = None
-
-    def __init__(self, actor_ref, attr_path=None):
-        if not actor_ref.is_alive():
-            raise ActorDeadError('{} not found'.format(actor_ref))
-        self.actor_ref = actor_ref
-        self._actor = actor_ref._actor
-        self._attr_path = attr_path or tuple()
-        self._known_attrs = self._introspect_attributes()
-        self._actor_proxies = {}
-        self._callable_proxies = {}
-
-    def _introspect_attributes(self):
-        """Introspects the actor's attributes."""
-        result = {}
-        attr_paths_to_visit = [[attr_name] for attr_name in dir(self._actor)]
-
-        while attr_paths_to_visit:
-            attr_path = attr_paths_to_visit.pop(0)
-
-            if not self._is_exposable_attribute(attr_path[-1]):
-                continue
-
-            attr = self._actor._introspect_attribute_from_path(attr_path)
-
-            if self._is_self_proxy(attr):
-                logger.warning(
-                    (
-                        '{} attribute {!r} is a proxy to itself. '
-                        'Consider making it private by renaming it to {!r}.'
-                    ).format(
-                        self._actor, '.'.join(attr_path), '_' + attr_path[-1]
-                    )
-                )
-                continue
-
-            traversable = self._is_traversable_attribute(attr)
-            result[tuple(attr_path)] = {
-                'callable': self._is_callable_attribute(attr),
-                'traversable': traversable,
-            }
-
-            if traversable:
-                for attr_name in dir(attr):
-                    attr_paths_to_visit.append(attr_path + [attr_name])
-
-        return result
-
-    def _is_exposable_attribute(self, attr_name):
-        """
-        Returns true for any attribute name that may be exposed through
-        :class:`ActorProxy`.
-        """
-        return not attr_name.startswith('_')
-
-    def _is_self_proxy(self, attr):
-        """Returns true if attribute is an equivalent actor proxy."""
-        return attr == self
-
-    def _is_callable_attribute(self, attr):
-        """Returns true for any attribute that is callable."""
-        return isinstance(attr, _compat.Callable)
-
-    def _is_traversable_attribute(self, attr):
-        """
-        Returns true for any attribute that may be traversed from another
-        actor through a proxy.
-        """
-        return (
-            getattr(attr, '_pykka_traversable', False) is True
-            or getattr(attr, 'pykka_traversable', False) is True
-        )
-
-    def __eq__(self, other):
-        if not isinstance(other, ActorProxy):
-            return False
-        if self._actor != other._actor:
-            return False
-        if self._attr_path != other._attr_path:
-            return False
-        return True
-
-    def __hash__(self):
-        return hash((self._actor, self._attr_path))
-
-    def __repr__(self):
-        return '<ActorProxy for {}, attr_path={!r}>'.format(
-            self.actor_ref, self._attr_path
-        )
-
-    def __dir__(self):
-        result = ['__class__']
-        result += list(self.__class__.__dict__.keys())
-        result += list(self.__dict__.keys())
-        result += [attr_path[0] for attr_path in list(self._known_attrs.keys())]
-        return sorted(result)
-
-    def __getattr__(self, name):
-        """Get a field or callable from the actor."""
-        attr_path = self._attr_path + (name,)
-
-        if attr_path not in self._known_attrs:
-            self._known_attrs = self._introspect_attributes()
-
-        attr_info = self._known_attrs.get(attr_path)
-        if attr_info is None:
-            raise AttributeError('{} has no attribute {!r}'.format(self, name))
-
-        if attr_info['callable']:
-            if attr_path not in self._callable_proxies:
-                self._callable_proxies[attr_path] = CallableProxy(
-                    self.actor_ref, attr_path
-                )
-            return self._callable_proxies[attr_path]
-        elif attr_info['traversable']:
-            if attr_path not in self._actor_proxies:
-                self._actor_proxies[attr_path] = ActorProxy(
-                    self.actor_ref, attr_path
-                )
-            return self._actor_proxies[attr_path]
-        else:
-            message = messages.ProxyGetAttr(attr_path=attr_path)
-            return self.actor_ref.ask(message, block=False)
-
-    def __setattr__(self, name, value):
-        """
-        Set a field on the actor.
-
-        Blocks until the field is set to check if any exceptions was raised.
-        """
-        if name == 'actor_ref' or name.startswith('_'):
-            return super(ActorProxy, self).__setattr__(name, value)
-        attr_path = self._attr_path + (name,)
-        message = messages.ProxySetAttr(attr_path=attr_path, value=value)
-        return self.actor_ref.ask(message)
-
-
-class CallableProxy(object):
-    """Proxy to a single method.
-
-    :class:`CallableProxy` instances are returned when accessing methods on a
-    :class:`ActorProxy` without calling them.
-
-    Example::
-
-        proxy = AnActor.start().proxy()
-
-        # Ask semantics returns a future. See `__call__()` docs.
-        future = proxy.do_work()
-
-        # Tell semantics are fire and forget. See `defer()` docs.
-        proxy.do_work.defer()
-    """
-
-    def __init__(self, actor_ref, attr_path):
-        self.actor_ref = actor_ref
-        self._attr_path = attr_path
-
-    def __call__(self, *args, **kwargs):
-        """Call with :meth:`~pykka.ActorRef.ask` semantics.
-
-        Returns a future which will yield the called method's return value.
-
-        If the call raises an exception is set on the future, and will be
-        reraised by :meth:`~pykka.Future.get`. If the future is left unused,
-        the exception will not be reraised. Either way, the exception will
-        also be logged. See :ref:`logging` for details.
-        """
-        message = messages.ProxyCall(
-            attr_path=self._attr_path, args=args, kwargs=kwargs
-        )
-        return self.actor_ref.ask(message, block=False)
-
-    def defer(self, *args, **kwargs):
-        """Call with :meth:`~pykka.ActorRef.tell` semantics.
-
-        Does not create or return a future.
-
-        If the call raises an exception, there is no future to set the
-        exception on. Thus, the actor's :meth:`~pykka.Actor.on_failure` hook
-        is called instead.
-
-        .. versionadded:: 2.0
-        """
-        message = messages.ProxyCall(
-            attr_path=self._attr_path, args=args, kwargs=kwargs
-        )
-        return self.actor_ref.tell(message)
-
-
-def traversable(obj):
-    """Marks an actor attribute as traversable.
-
-    The traversable marker makes the actor attribute's own methods and
-    attributes available to users of the actor through an
-    :class:`~pykka.ActorProxy`.
-
-    Used as a function to mark a single attribute::
-
-        class AnActor(pykka.ThreadingActor):
-            playback = pykka.traversable(Playback())
-
-        class Playback(object):
-            def play(self):
-                return True
-
-    This function can also be used as a class decorator, making all instances
-    of the class traversable::
-
-        class AnActor(pykka.ThreadingActor):
-            playback = Playback()
-
-        @pykka.traversable
-        class Playback(object):
-            def play(self):
-                return True
-
-    The third alternative, and the only way in Pykka < 2.0, is to manually
-    mark a class as traversable by setting the ``pykka_traversable`` attribute
-    to :class:`True`::
-
-        class AnActor(pykka.ThreadingActor):
-            playback = Playback()
-
-        class Playback(object):
-            pykka_traversable = True
-
-            def play(self):
-                return True
-
-    When the attribute is marked as traversable, its methods can be executed
-    in the context of the actor through an actor proxy::
-
-        proxy = AnActor.start().proxy()
-        assert proxy.playback.play().get() is True
-
-    .. versionadded:: 2.0
-    """
-    if hasattr(obj, '__slots__'):
-        raise Exception(
-            'pykka.traversable() cannot be used to mark '
-            'an object using slots as traversable.'
-        )
-    obj._pykka_traversable = True
-    return obj
diff --git a/venv/lib/python3.7/site-packages/pykka/_ref.py b/venv/lib/python3.7/site-packages/pykka/_ref.py
deleted file mode 100644
index 23d11cf..0000000
--- a/venv/lib/python3.7/site-packages/pykka/_ref.py
+++ /dev/null
@@ -1,171 +0,0 @@
-from pykka import ActorDeadError, ActorProxy
-from pykka._envelope import Envelope
-from pykka.messages import _ActorStop
-
-
-__all__ = ['ActorRef']
-
-
-class ActorRef(object):
-    """
-    Reference to a running actor which may safely be passed around.
-
-    :class:`ActorRef` instances are returned by :meth:`Actor.start` and the
-    lookup methods in :class:`ActorRegistry <pykka.ActorRegistry>`. You should
-    never need to create :class:`ActorRef` instances yourself.
-
-    :param actor: the actor to wrap
-    :type actor: :class:`Actor`
-    """
-
-    #: The class of the referenced actor.
-    actor_class = None
-
-    #: See :attr:`Actor.actor_urn`.
-    actor_urn = None
-
-    #: See :attr:`Actor.actor_inbox`.
-    actor_inbox = None
-
-    #: See :attr:`Actor.actor_stopped`.
-    actor_stopped = None
-
-    def __init__(self, actor):
-        self._actor = actor
-        self.actor_class = actor.__class__
-        self.actor_urn = actor.actor_urn
-        self.actor_inbox = actor.actor_inbox
-        self.actor_stopped = actor.actor_stopped
-
-    def __repr__(self):
-        return '<ActorRef for {}>'.format(self)
-
-    def __str__(self):
-        return '{} ({})'.format(self.actor_class.__name__, self.actor_urn)
-
-    def is_alive(self):
-        """
-        Check if actor is alive.
-
-        This is based on the actor's stopped flag. The actor is not guaranteed
-        to be alive and responding even though :meth:`is_alive` returns
-        :class:`True`.
-
-        :return:
-            Returns :class:`True` if actor is alive, :class:`False` otherwise.
-        """
-        return not self.actor_stopped.is_set()
-
-    def tell(self, message):
-        """
-        Send message to actor without waiting for any response.
-
-        Will generally not block, but if the underlying queue is full it will
-        block until a free slot is available.
-
-        :param message: message to send
-        :type message: any
-
-        :raise: :exc:`pykka.ActorDeadError` if actor is not available
-        :return: nothing
-        """
-        if not self.is_alive():
-            raise ActorDeadError('{} not found'.format(self))
-        self.actor_inbox.put(Envelope(message))
-
-    def ask(self, message, block=True, timeout=None):
-        """
-        Send message to actor and wait for the reply.
-
-        The message can be of any type.
-        If ``block`` is :class:`False`, it will immediately return a
-        :class:`Future <pykka.Future>` instead of blocking.
-
-        If ``block`` is :class:`True`, and ``timeout`` is :class:`None`, as
-        default, the method will block until it gets a reply, potentially
-        forever. If ``timeout`` is an integer or float, the method will wait
-        for a reply for ``timeout`` seconds, and then raise
-        :exc:`pykka.Timeout`.
-
-        :param message: message to send
-        :type message: any
-
-        :param block: whether to block while waiting for a reply
-        :type block: boolean
-
-        :param timeout: seconds to wait before timeout if blocking
-        :type timeout: float or :class:`None`
-
-        :raise: :exc:`pykka.Timeout` if timeout is reached if blocking
-        :raise: any exception returned by the receiving actor if blocking
-        :return: :class:`pykka.Future`, or response if blocking
-        """
-        future = self.actor_class._create_future()
-
-        try:
-            if not self.is_alive():
-                raise ActorDeadError('{} not found'.format(self))
-        except ActorDeadError:
-            future.set_exception()
-        else:
-            self.actor_inbox.put(Envelope(message, reply_to=future))
-
-        if block:
-            return future.get(timeout=timeout)
-        else:
-            return future
-
-    def stop(self, block=True, timeout=None):
-        """
-        Send a message to the actor, asking it to stop.
-
-        Returns :class:`True` if actor is stopped or was being stopped at the
-        time of the call. :class:`False` if actor was already dead. If
-        ``block`` is :class:`False`, it returns a future wrapping the result.
-
-        Messages sent to the actor before the actor is asked to stop will
-        be processed normally before it stops.
-
-        Messages sent to the actor after the actor is asked to stop will
-        be replied to with :exc:`pykka.ActorDeadError` after it stops.
-
-        The actor may not be restarted.
-
-        ``block`` and ``timeout`` works as for :meth:`ask`.
-
-        :return: :class:`pykka.Future`, or a boolean result if blocking
-        """
-        ask_future = self.ask(_ActorStop(), block=False)
-
-        def _stop_result_converter(timeout):
-            try:
-                ask_future.get(timeout=timeout)
-                return True
-            except ActorDeadError:
-                return False
-
-        converted_future = ask_future.__class__()
-        converted_future.set_get_hook(_stop_result_converter)
-
-        if block:
-            return converted_future.get(timeout=timeout)
-        else:
-            return converted_future
-
-    def proxy(self):
-        """
-        Wraps the :class:`ActorRef` in an :class:`ActorProxy
-        <pykka.ActorProxy>`.
-
-        Using this method like this::
-
-            proxy = AnActor.start().proxy()
-
-        is analogous to::
-
-            proxy = ActorProxy(AnActor.start())
-
-        :raise: :exc:`pykka.ActorDeadError` if actor is not available
-        :return: :class:`pykka.ActorProxy`
-        """
-        return ActorProxy(self)
diff --git a/venv/lib/python3.7/site-packages/pykka/_registry.py b/venv/lib/python3.7/site-packages/pykka/_registry.py
deleted file mode 100644
index 1ee682b..0000000
--- a/venv/lib/python3.7/site-packages/pykka/_registry.py
+++ /dev/null
@@ -1,171 +0,0 @@
-from __future__ import absolute_import
-
-import logging
-import threading
-
-from pykka import _compat
-
-logger = logging.getLogger('pykka')
-
-
-__all__ = ['ActorRegistry']
-
-
-class ActorRegistry(object):
-    """
-    Registry which provides easy access to all running actors.
-
-    Contains global state, but should be thread-safe.
-    """
-
-    _actor_refs = []
-    _actor_refs_lock = threading.RLock()
-
-    @classmethod
-    def broadcast(cls, message, target_class=None):
-        """
-        Broadcast ``message`` to all actors of the specified ``target_class``.
-
-        If no ``target_class`` is specified, the message is broadcasted to all
-        actors.
-
-        :param message: the message to send
-        :type message: any
-
-        :param target_class: optional actor class to broadcast the message to
-        :type target_class: class or class name
-        """
-        if isinstance(target_class, _compat.string_types):
-            targets = cls.get_by_class_name(target_class)
-        elif target_class is not None:
-            targets = cls.get_by_class(target_class)
-        else:
-            targets = cls.get_all()
-        for ref in targets:
-            ref.tell(message)
-
-    @classmethod
-    def get_all(cls):
-        """
-        Get :class:`ActorRef <pykka.ActorRef>` for all running actors.
-
-        :returns: list of :class:`pykka.ActorRef`
-        """
-        with cls._actor_refs_lock:
-            return cls._actor_refs[:]
-
-    @classmethod
-    def get_by_class(cls, actor_class):
-        """
-        Get :class:`ActorRef` for all running actors of the given class, or of
-        any subclass of the given class.
-
-        :param actor_class: actor class, or any superclass of the actor
-        :type actor_class: class
-
-        :returns: list of :class:`pykka.ActorRef`
-        """
-        with cls._actor_refs_lock:
-            return [
-                ref
-                for ref in cls._actor_refs
-                if issubclass(ref.actor_class, actor_class)
-            ]
-
-    @classmethod
-    def get_by_class_name(cls, actor_class_name):
-        """
-        Get :class:`ActorRef` for all running actors of the given class
-        name.
-
-        :param actor_class_name: actor class name
-        :type actor_class_name: string
-
-        :returns: list of :class:`pykka.ActorRef`
-        """
-        with cls._actor_refs_lock:
-            return [
-                ref
-                for ref in cls._actor_refs
-                if ref.actor_class.__name__ == actor_class_name
-            ]
-
-    @classmethod
-    def get_by_urn(cls, actor_urn):
-        """
-        Get an actor by its universally unique URN.
-
-        :param actor_urn: actor URN
-        :type actor_urn: string
-
-        :returns: :class:`pykka.ActorRef` or :class:`None` if not found
-        """
-        with cls._actor_refs_lock:
-            refs = [
-                ref for ref in cls._actor_refs if ref.actor_urn == actor_urn
-            ]
-            if refs:
-                return refs[0]
-
-    @classmethod
-    def register(cls, actor_ref):
-        """
-        Register an :class:`ActorRef` in the registry.
-
-        This is done automatically when an actor is started, e.g. by calling
-        :meth:`Actor.start() <pykka.Actor.start>`.
-
-        :param actor_ref: reference to the actor to register
-        :type actor_ref: :class:`pykka.ActorRef`
-        """
-        with cls._actor_refs_lock:
-            cls._actor_refs.append(actor_ref)
-        logger.debug('Registered {}'.format(actor_ref))
-
-    @classmethod
-    def stop_all(cls, block=True, timeout=None):
-        """
-        Stop all running actors.
-
-        ``block`` and ``timeout`` works as for
-        :meth:`ActorRef.stop() <pykka.ActorRef.stop>`.
-
-        If ``block`` is :class:`True`, the actors are guaranteed to be stopped
-        in the reverse of the order they were started in. This is helpful if
-        you have simple dependencies in between your actors, where it is
-        sufficient to shut down actors in a LIFO manner: last started, first
-        stopped.
-
-        If you have more complex dependencies in between your actors, you
-        should take care to shut them down in the required order yourself, e.g.
-        by stopping dependees from a dependency's
-        :meth:`on_stop() <pykka.Actor.on_stop>` method.
-
-        :returns: If not blocking, a list with a future for each stop action.
-            If blocking, a list of return values from
-            :meth:`pykka.ActorRef.stop`.
-        """
-        return [ref.stop(block, timeout) for ref in reversed(cls.get_all())]
-
-    @classmethod
-    def unregister(cls, actor_ref):
-        """
-        Remove an :class:`ActorRef <pykka.ActorRef>` from the registry.
-
-        This is done automatically when an actor is stopped, e.g. by calling
-        :meth:`Actor.stop() <pykka.Actor.stop>`.
-
-        :param actor_ref: reference to the actor to unregister
-        :type actor_ref: :class:`pykka.ActorRef`
-        """
-        removed = False
-        with cls._actor_refs_lock:
-            if actor_ref in cls._actor_refs:
-                cls._actor_refs.remove(actor_ref)
-                removed = True
-        if removed:
-            logger.debug('Unregistered {}'.format(actor_ref))
-        else:
-            logger.debug(
-                'Unregistered {} (not found in registry)'.format(actor_ref)
-            )
diff --git a/venv/lib/python3.7/site-packages/pykka/_threading.py b/venv/lib/python3.7/site-packages/pykka/_threading.py
deleted file mode 100644
index 57faf85..0000000
--- a/venv/lib/python3.7/site-packages/pykka/_threading.py
+++ /dev/null
@@ -1,97 +0,0 @@
-from __future__ import absolute_import
-
-import sys
-import threading
-
-from pykka import Actor, Future, Timeout, _compat
-
-
-__all__ = ['ThreadingActor', 'ThreadingFuture']
-
-
-class ThreadingFuture(Future):
-    """
-    :class:`ThreadingFuture` implements :class:`Future` for use with
-    :class:`ThreadingActor <pykka.ThreadingActor>`.
-
-    The future is implemented using a :class:`queue.Queue`.
-
-    The future does *not* make a copy of the object which is :meth:`set()
-    <pykka.Future.set>` on it. It is the setters responsibility to only pass
-    immutable objects or make a copy of the object before setting it on the
-    future.
-
-    .. versionchanged:: 0.14
-        Previously, the encapsulated value was a copy made with
-        :func:`copy.deepcopy`, unless the encapsulated value was a future, in
-        which case the original future was encapsulated.
-    """
-
-    def __init__(self):
-        super(ThreadingFuture, self).__init__()
-        self._queue = _compat.queue.Queue(maxsize=1)
-        self._data = None
-
-    def get(self, timeout=None):
-        try:
-            return super(ThreadingFuture, self).get(timeout=timeout)
-        except NotImplementedError:
-            pass
-
-        try:
-            if self._data is None:
-                self._data = self._queue.get(True, timeout)
-            if 'exc_info' in self._data:
-                _compat.reraise(*self._data['exc_info'])
-            else:
-                return self._data['value']
-        except _compat.queue.Empty:
-            raise Timeout('{} seconds'.format(timeout))
-
-    def set(self, value=None):
-        self._queue.put({'value': value}, block=False)
-
-    def set_exception(self, exc_info=None):
-        assert exc_info is None or len(exc_info) == 3
-        self._queue.put({'exc_info': exc_info or sys.exc_info()})
-
-
-class ThreadingActor(Actor):
-    """
-    :class:`ThreadingActor` implements :class:`Actor` using regular Python
-    threads.
-
-    This implementation is slower than :class:`GeventActor
-    <pykka.gevent.GeventActor>`, but can be used in a process with other
-    threads that are not Pykka actors.
-    """
-
-    use_daemon_thread = False
-    """
-    A boolean value indicating whether this actor is executed on a thread that
-    is a daemon thread (:class:`True`) or not (:class:`False`). This must be
-    set before :meth:`pykka.Actor.start` is called, otherwise
-    :exc:`RuntimeError` is raised.
-
-    The entire Python program exits when no alive non-daemon threads are left.
-    This means that an actor running on a daemon thread may be interrupted at
-    any time, and there is no guarantee that cleanup will be done or that
-    :meth:`pykka.Actor.on_stop` will be called.
-
-    Actors do not inherit the daemon flag from the actor that made it. It
-    always has to be set explicitly for the actor to run on a daemonic thread.
-    """
-
-    @staticmethod
-    def _create_actor_inbox():
-        return _compat.queue.Queue()
-
-    @staticmethod
-    def _create_future():
-        return ThreadingFuture()
-
-    def _start_actor_loop(self):
-        thread = threading.Thread(target=self._actor_loop)
-        thread.name = thread.name.replace('Thread', self.__class__.__name__)
-        thread.daemon = self.use_daemon_thread
-        thread.start()
diff --git a/venv/lib/python3.7/site-packages/pykka/debug.py b/venv/lib/python3.7/site-packages/pykka/debug.py
deleted file mode 100644
index f62556f..0000000
--- a/venv/lib/python3.7/site-packages/pykka/debug.py
+++ /dev/null
@@ -1,67 +0,0 @@
-from __future__ import absolute_import
-
-import logging
-import sys
-import threading
-import traceback
-
-
-logger = logging.getLogger('pykka')
-
-
-__all__ = ['log_thread_tracebacks']
-
-
-def log_thread_tracebacks(*args, **kwargs):
-    """Logs at :attr:`logging.CRITICAL` level a traceback for each running
-    thread.
-
-    This can be a convenient tool for debugging deadlocks.
-
-    The function accepts any arguments so that it can easily be used as e.g. a
-    signal handler, but it does not use the arguments for anything.
-
-    To use this function as a signal handler, setup logging with a
-    :attr:`logging.CRITICAL` threshold or lower and make your main thread
-    register this with the :mod:`signal` module::
-
-        import logging
-        import signal
-
-        import pykka.debug
-
-        logging.basicConfig(level=logging.DEBUG)
-        signal.signal(signal.SIGUSR1, pykka.debug.log_thread_tracebacks)
-
-    If your application deadlocks, send the `SIGUSR1` signal to the process::
-
-        kill -SIGUSR1 <pid of your process>
-
-    Signal handler caveats:
-
-    - The function *must* be registered as a signal handler by your main
-      thread. If not, :func:`signal.signal` will raise a :exc:`ValueError`.
-
-    - All signals in Python are handled by the main thread. Thus, the signal
-      will only be handled, and the tracebacks logged, if your main thread is
-      available to do some work. Making your main thread idle using
-      :func:`time.sleep` is OK. The signal will awaken your main thread.
-      Blocking your main thread on e.g. :func:`queue.Queue.get` or
-      :meth:`pykka.Future.get` will break signal handling, and thus you won't
-      be able to signal your process to print the thread tracebacks.
-
-    The morale is: setup signals using your main thread, start your actors,
-    then let your main thread relax for the rest of your application's life
-    cycle.
-
-    .. versionadded:: 1.1
-    """
-
-    thread_names = dict((t.ident, t.name) for t in threading.enumerate())
-
-    for ident, frame in sys._current_frames().items():
-        name = thread_names.get(ident, '?')
-        stack = ''.join(traceback.format_stack(frame))
-        logger.critical(
-            'Current state of {} (ident: {}):\n{}'.format(name, ident, stack)
-        )
diff --git a/venv/lib/python3.7/site-packages/pykka/eventlet.py b/venv/lib/python3.7/site-packages/pykka/eventlet.py
deleted file mode 100644
index 9901853..0000000
--- a/venv/lib/python3.7/site-packages/pykka/eventlet.py
+++ /dev/null
@@ -1,107 +0,0 @@
-from __future__ import absolute_import
-
-import sys
-
-import eventlet
-import eventlet.event
-import eventlet.queue
-
-from pykka import Actor, Future, Timeout
-
-
-__all__ = ['EventletActor', 'EventletEvent', 'EventletFuture']
-
-
-class EventletEvent(eventlet.event.Event):
-    """
-    :class:`EventletEvent` adapts :class:`eventlet.event.Event` to
-    :class:`threading.Event` interface.
-    """
-
-    def set(self):
-        if self.ready():
-            self.reset()
-        self.send()
-
-    def is_set(self):
-        return self.ready()
-
-    isSet = is_set
-
-    def clear(self):
-        if self.ready():
-            self.reset()
-
-    def wait(self, timeout):
-        if timeout is not None:
-            wait_timeout = eventlet.Timeout(timeout)
-
-            try:
-                with wait_timeout:
-                    super(EventletEvent, self).wait()
-            except eventlet.Timeout as t:
-                if t is not wait_timeout:
-                    raise
-                return False
-        else:
-            self.event.wait()
-
-        return True
-
-
-class EventletFuture(Future):
-    """
-    :class:`EventletFuture` implements :class:`pykka.Future` for use with
-    :class:`EventletActor`.
-    """
-
-    event = None
-
-    def __init__(self):
-        super(EventletFuture, self).__init__()
-        self.event = eventlet.event.Event()
-
-    def get(self, timeout=None):
-        try:
-            return super(EventletFuture, self).get(timeout=timeout)
-        except NotImplementedError:
-            pass
-
-        if timeout is not None:
-            wait_timeout = eventlet.Timeout(timeout)
-            try:
-                with wait_timeout:
-                    return self.event.wait()
-            except eventlet.Timeout as t:
-                if t is not wait_timeout:
-                    raise
-                raise Timeout(t)
-        else:
-            return self.event.wait()
-
-    def set(self, value=None):
-        self.event.send(value)
-
-    def set_exception(self, exc_info=None):
-        assert exc_info is None or len(exc_info) == 3
-        self.event.send_exception(*(exc_info or sys.exc_info()))
-
-
-class EventletActor(Actor):
-    """
-    :class:`EventletActor` implements :class:`pykka.Actor` using the `eventlet
-    <https://eventlet.net/>`_ library.
-
-    This implementation uses eventlet green threads.
-    """
-
-    @staticmethod
-    def _create_actor_inbox():
-        return eventlet.queue.Queue()
-
-    @staticmethod
-    def _create_future():
-        return EventletFuture()
-
-    def _start_actor_loop(self):
-        eventlet.greenthread.spawn(self._actor_loop)
diff --git a/venv/lib/python3.7/site-packages/pykka/gevent.py b/venv/lib/python3.7/site-packages/pykka/gevent.py
deleted file mode 100644
index 9fa0781..0000000
--- a/venv/lib/python3.7/site-packages/pykka/gevent.py
+++ /dev/null
@@ -1,73 +0,0 @@
-from __future__ import absolute_import
-
-import sys
-
-import gevent
-import gevent.event
-import gevent.queue
-
-from pykka import Actor, Future, Timeout
-
-
-__all__ = ['GeventActor', 'GeventFuture']
-
-
-class GeventFuture(Future):
-    """
-    :class:`GeventFuture` implements :class:`pykka.Future` for use with
-    :class:`GeventActor`.
-
-    It encapsulates a :class:`gevent.event.AsyncResult` object which may be
-    used directly, though it will couple your code with gevent.
-    """
-
-    #: The encapsulated :class:`gevent.event.AsyncResult`
-    async_result = None
-
-    def __init__(self, async_result=None):
-        super(GeventFuture, self).__init__()
-        if async_result is None:
-            async_result = gevent.event.AsyncResult()
-        self.async_result = async_result
-
-    def get(self, timeout=None):
-        try:
-            return super(GeventFuture, self).get(timeout=timeout)
-        except NotImplementedError:
-            pass
-
-        try:
-            return self.async_result.get(timeout=timeout)
-        except gevent.Timeout as e:
-            raise Timeout(e)
-
-    def set(self, value=None):
-        assert not self.async_result.ready(), 'value has already been set'
-        self.async_result.set(value)
-
-    def set_exception(self, exc_info=None):
-        assert exc_info is None or len(exc_info) == 3
-        exc_info = exc_info or sys.exc_info()
-        self.async_result.set_exception(exc_info[1], exc_info=exc_info)
-
-
-class GeventActor(Actor):
-    """
-    :class:`GeventActor` implements :class:`pykka.Actor` using the `gevent
-    <http://www.gevent.org/>`_ library. gevent is a coroutine-based Python
-    networking library that uses greenlet to provide a high-level synchronous
-    API on top of libevent event loop.
-
-    This is a very fast implementation.
-    """
-
-    @staticmethod
-    def _create_actor_inbox():
-        return gevent.queue.Queue()
-
-    @staticmethod
-    def _create_future():
-        return GeventFuture()
-
-    def _start_actor_loop(self):
-        gevent.Greenlet.spawn(self._actor_loop)
diff --git a/venv/lib/python3.7/site-packages/pykka/messages.py b/venv/lib/python3.7/site-packages/pykka/messages.py
deleted file mode 100644
index 8c5742b..0000000
--- a/venv/lib/python3.7/site-packages/pykka/messages.py
+++ /dev/null
@@ -1,77 +0,0 @@
-"""
-The :mod:`pykka.messages` module contains Pykka's own actor messages.
-
-In general, you should not need to use any of these classes. However, they have
-been made part of the public API so that certain optimizations can be done
-without touching Pykka's internals.
-
-An example is to combine :meth:`~pykka.ActorRef.ask` and :class:`ProxyCall`
-to call a method on an actor without having to spend any resources on creating
-a proxy object::
-
-    reply = actor_ref.ask(
-        ProxyCall(
-            attr_path=['my_method'],
-            args=['foo'],
-            kwargs={'bar': 'baz'}
-        )
-    )
-
-Another example is to use :meth:`~pykka.ActorRef.tell` instead of
-:meth:`~pykka.ActorRef.ask` for the proxy method call, and thus avoid the
-creation of a future for the return value if you don't need it.
-
-It should be noted that these optimizations should only be necessary in very
-special circumstances.
-"""
-
-import warnings
-from collections import namedtuple
-
-
-# Internal actor messages
-_ActorStop = namedtuple('ActorStop', [])
-
-# Public proxy messages
-# TODO Add docstrings to classes and attributes once we drop Python 2.7 support
-ProxyCall = namedtuple('ProxyCall', ['attr_path', 'args', 'kwargs'])
-ProxyGetAttr = namedtuple('ProxyGetAttr', ['attr_path'])
-ProxySetAttr = namedtuple('ProxySetAttr', ['attr_path', 'value'])
-
-
-def _upgrade_internal_message(message):
-    """Filter that upgrades dict-based internal messages to the new format.
-
-    This is needed for a transitional period because Mopidy < 3 uses
-    the old internal message format directly, and maybe others.
-    """
-
-    if not isinstance(message, dict):
-        return message
-    if not message.get('command', '').startswith('pykka_'):
-        return message
-
-    warnings.warn(
-        'Pykka received a dict-based internal message. '
-        'This is deprecated and will be unsupported in the future. '
-        'Message: {!r}'.format(message),
-        DeprecationWarning,
-    )
-
-    command = message.get('command')
-    if command == 'pykka_stop':
-        return _ActorStop()
-    elif command == 'pykka_call':
-        return ProxyCall(
-            attr_path=message['attr_path'],
-            args=message['args'],
-            kwargs=message['kwargs'],
-        )
-    elif command == 'pykka_getattr':
-        return ProxyGetAttr(attr_path=message['attr_path'])
-    elif command == 'pykka_setattr':
-        return ProxySetAttr(
-            attr_path=message['attr_path'], value=message['value']
-        )
-    else:
-        raise ValueError('Unknown internal message: {!r}'.format(message))
diff --git a/venv/lib/python3.7/site-packages/requests-2.22.0.dist-info/INSTALLER b/venv/lib/python3.7/site-packages/requests-2.22.0.dist-info/INSTALLER
deleted file mode 100644
index a1b589e..0000000
--- a/venv/lib/python3.7/site-packages/requests-2.22.0.dist-info/INSTALLER
+++ /dev/null
@@ -1 +0,0 @@
-pip
diff --git a/venv/lib/python3.7/site-packages/requests-2.22.0.dist-info/LICENSE b/venv/lib/python3.7/site-packages/requests-2.22.0.dist-info/LICENSE
deleted file mode 100644
index 841c602..0000000
--- a/venv/lib/python3.7/site-packages/requests-2.22.0.dist-info/LICENSE
+++ /dev/null
@@ -1,13 +0,0 @@
-Copyright 2018 Kenneth Reitz
-
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       https://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
diff --git a/venv/lib/python3.7/site-packages/requests-2.22.0.dist-info/METADATA b/venv/lib/python3.7/site-packages/requests-2.22.0.dist-info/METADATA
deleted file mode 100644
index 02f2eca..0000000
--- a/venv/lib/python3.7/site-packages/requests-2.22.0.dist-info/METADATA
+++ /dev/null
@@ -1,145 +0,0 @@
-Metadata-Version: 2.1
-Name: requests
-Version: 2.22.0
-Summary: Python HTTP for Humans.
-Home-page: http://python-requests.org
-Author: Kenneth Reitz
-Author-email: me@kennethreitz.org
-License: Apache 2.0
-Platform: UNKNOWN
-Classifier: Development Status :: 5 - Production/Stable
-Classifier: Intended Audience :: Developers
-Classifier: Natural Language :: English
-Classifier: License :: OSI Approved :: Apache Software License
-Classifier: Programming Language :: Python
-Classifier: Programming Language :: Python :: 2
-Classifier: Programming Language :: Python :: 2.7
-Classifier: Programming Language :: Python :: 3
-Classifier: Programming Language :: Python :: 3.5
-Classifier: Programming Language :: Python :: 3.6
-Classifier: Programming Language :: Python :: 3.7
-Classifier: Programming Language :: Python :: Implementation :: CPython
-Classifier: Programming Language :: Python :: Implementation :: PyPy
-Requires-Python: >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*
-Description-Content-Type: text/markdown
-Requires-Dist: chardet (<3.1.0,>=3.0.2)
-Requires-Dist: idna (<2.9,>=2.5)
-Requires-Dist: urllib3 (!=1.25.0,!=1.25.1,<1.26,>=1.21.1)
-Requires-Dist: certifi (>=2017.4.17)
-Provides-Extra: security
-Requires-Dist: pyOpenSSL (>=0.14) ; extra == 'security'
-Requires-Dist: cryptography (>=1.3.4) ; extra == 'security'
-Requires-Dist: idna (>=2.0.0) ; extra == 'security'
-Provides-Extra: socks
-Requires-Dist: PySocks (!=1.5.7,>=1.5.6) ; extra == 'socks'
-Requires-Dist: win-inet-pton ; (sys_platform == "win32" and python_version == "2.7") and extra == 'socks'
-
-Requests: HTTP for Humans™
-==========================
-
-[![image](https://img.shields.io/pypi/v/requests.svg)](https://pypi.org/project/requests/)
-[![image](https://img.shields.io/pypi/l/requests.svg)](https://pypi.org/project/requests/)
-[![image](https://img.shields.io/pypi/pyversions/requests.svg)](https://pypi.org/project/requests/)
-[![codecov.io](https://codecov.io/github/requests/requests/coverage.svg?branch=master)](https://codecov.io/github/requests/requests)
-[![image](https://img.shields.io/github/contributors/requests/requests.svg)](https://github.com/requests/requests/graphs/contributors)
-[![image](https://img.shields.io/badge/Say%20Thanks-!-1EAEDB.svg)](https://saythanks.io/to/kennethreitz)
-
-Requests is the only *Non-GMO* HTTP library for Python, safe for human
-consumption.
-
-![image](https://farm5.staticflickr.com/4317/35198386374_1939af3de6_k_d.jpg)
-
-Behold, the power of Requests:
-
-``` {.sourceCode .python}
->>> import requests
->>> r = requests.get('https://api.github.com/user', auth=('user', 'pass'))
->>> r.status_code
-200
->>> r.headers['content-type']
-'application/json; charset=utf8'
->>> r.encoding
-'utf-8'
->>> r.text
-u'{"type":"User"...'
->>> r.json()
-{u'disk_usage': 368627, u'private_gists': 484, ...}
-```
-
-See [the similar code, sans Requests](https://gist.github.com/973705).
-
-[![image](https://raw.githubusercontent.com/requests/requests/master/docs/_static/requests-logo-small.png)](http://docs.python-requests.org/)
-
-Requests allows you to send *organic, grass-fed* HTTP/1.1 requests,
-without the need for manual labor. There's no need to manually add query
-strings to your URLs, or to form-encode your POST data. Keep-alive and
-HTTP connection pooling are 100% automatic, thanks to
-[urllib3](https://github.com/shazow/urllib3).
-
-Besides, all the cool kids are doing it. Requests is one of the most
-downloaded Python packages of all time, pulling in over 11,000,000
-downloads every month. You don't want to be left out!
-
-Feature Support
----------------
-
-Requests is ready for today's web.
-
--   International Domains and URLs
--   Keep-Alive & Connection Pooling
--   Sessions with Cookie Persistence
--   Browser-style SSL Verification
--   Basic/Digest Authentication
--   Elegant Key/Value Cookies
--   Automatic Decompression
--   Automatic Content Decoding
--   Unicode Response Bodies
--   Multipart File Uploads
--   HTTP(S) Proxy Support
--   Connection Timeouts
--   Streaming Downloads
--   `.netrc` Support
--   Chunked Requests
-
-Requests officially supports Python 2.7 & 3.4–3.7, and runs great on
-PyPy.
-
-Installation
-------------
-
-To install Requests, simply use [pipenv](http://pipenv.org/) (or pip, of
-course):
-
-``` {.sourceCode .bash}
-$ pipenv install requests
-✨🍰✨
-```
-
-Satisfaction guaranteed.
-
-Documentation
--------------
-
-Fantastic documentation is available at
-<http://docs.python-requests.org/>, for a limited time only.
-
-How to Contribute
------------------
-
-1.  Become more familiar with the project by reading our [Contributor's Guide](http://docs.python-requests.org/en/latest/dev/contributing/) and our [development philosophy](http://docs.python-requests.org/en/latest/dev/philosophy/).
-2.  Check for open issues or open a fresh issue to start a discussion
-    around a feature idea or a bug. There is a [Contributor
-    Friendly](https://github.com/requests/requests/issues?direction=desc&labels=Contributor+Friendly&page=1&sort=updated&state=open)
-    tag for issues that should be ideal for people who are not very
-    familiar with the codebase yet.
-3.  Fork [the repository](https://github.com/requests/requests) on
-    GitHub to start making your changes to the **master** branch (or
-    branch off of it).
-4.  Write a test which shows that the bug was fixed or that the feature
-    works as expected.
-5.  Send a pull request and bug the maintainer until it gets merged and
-    published. :) Make sure to add yourself to
-    [AUTHORS](https://github.com/requests/requests/blob/master/AUTHORS.rst).
-
-
-
diff --git a/venv/lib/python3.7/site-packages/requests-2.22.0.dist-info/RECORD b/venv/lib/python3.7/site-packages/requests-2.22.0.dist-info/RECORD
deleted file mode 100644
index aacacfc..0000000
--- a/venv/lib/python3.7/site-packages/requests-2.22.0.dist-info/RECORD
+++ /dev/null
@@ -1,42 +0,0 @@
-requests-2.22.0.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
-requests-2.22.0.dist-info/LICENSE,sha256=vkGrrCxA-FMDB-jRcsWQtHb0pIi8amj43le3z2R4Zoc,582
-requests-2.22.0.dist-info/METADATA,sha256=sJ1ZdIgF0uoV9U58VVoEZv1QTyMCpmc2MQnbkob3nsE,5523
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-requests-2.22.0.dist-info/WHEEL,sha256=h_aVn5OB2IERUjMbi2pucmR_zzWJtk303YXvhh60NJ8,110
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-requests/__init__.py,sha256=PnKCgjcTq44LaAMzB-7--B2FdewRrE8F_vjZeaG9NhA,3921
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-requests/_internal_utils.py,sha256=Zx3PnEUccyfsB-ie11nZVAW8qClJy0gx1qNME7rgT18,1096
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-requests/certs.py,sha256=dOB5rV2DZ13dEhq9BUa_4hd5kAqg59e_zUZB00faYz8,453
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diff --git a/venv/lib/python3.7/site-packages/requests-2.22.0.dist-info/WHEEL b/venv/lib/python3.7/site-packages/requests-2.22.0.dist-info/WHEEL
deleted file mode 100644
index 78e6f69..0000000
--- a/venv/lib/python3.7/site-packages/requests-2.22.0.dist-info/WHEEL
+++ /dev/null
@@ -1,6 +0,0 @@
-Wheel-Version: 1.0
-Generator: bdist_wheel (0.33.4)
-Root-Is-Purelib: true
-Tag: py2-none-any
-Tag: py3-none-any
-
diff --git a/venv/lib/python3.7/site-packages/requests-2.22.0.dist-info/top_level.txt b/venv/lib/python3.7/site-packages/requests-2.22.0.dist-info/top_level.txt
deleted file mode 100644
index f229360..0000000
--- a/venv/lib/python3.7/site-packages/requests-2.22.0.dist-info/top_level.txt
+++ /dev/null
@@ -1 +0,0 @@
-requests
diff --git a/venv/lib/python3.7/site-packages/requests/__init__.py b/venv/lib/python3.7/site-packages/requests/__init__.py
deleted file mode 100644
index 9a899df..0000000
--- a/venv/lib/python3.7/site-packages/requests/__init__.py
+++ /dev/null
@@ -1,131 +0,0 @@
-# -*- coding: utf-8 -*-
-
-#   __
-#  /__)  _  _     _   _ _/   _
-# / (   (- (/ (/ (- _)  /  _)
-#          /
-
-"""
-Requests HTTP Library
-~~~~~~~~~~~~~~~~~~~~~
-
-Requests is an HTTP library, written in Python, for human beings. Basic GET
-usage:
-
-   >>> import requests
-   >>> r = requests.get('https://www.python.org')
-   >>> r.status_code
-   200
-   >>> 'Python is a programming language' in r.content
-   True
-
-... or POST:
-
-   >>> payload = dict(key1='value1', key2='value2')
-   >>> r = requests.post('https://httpbin.org/post', data=payload)
-   >>> print(r.text)
-   {
-     ...
-     "form": {
-       "key2": "value2",
-       "key1": "value1"
-     },
-     ...
-   }
-
-The other HTTP methods are supported - see `requests.api`. Full documentation
-is at <http://python-requests.org>.
-
-:copyright: (c) 2017 by Kenneth Reitz.
-:license: Apache 2.0, see LICENSE for more details.
-"""
-
-import urllib3
-import chardet
-import warnings
-from .exceptions import RequestsDependencyWarning
-
-
-def check_compatibility(urllib3_version, chardet_version):
-    urllib3_version = urllib3_version.split('.')
-    assert urllib3_version != ['dev']  # Verify urllib3 isn't installed from git.
-
-    # Sometimes, urllib3 only reports its version as 16.1.
-    if len(urllib3_version) == 2:
-        urllib3_version.append('0')
-
-    # Check urllib3 for compatibility.
-    major, minor, patch = urllib3_version  # noqa: F811
-    major, minor, patch = int(major), int(minor), int(patch)
-    # urllib3 >= 1.21.1, <= 1.25
-    assert major == 1
-    assert minor >= 21
-    assert minor <= 25
-
-    # Check chardet for compatibility.
-    major, minor, patch = chardet_version.split('.')[:3]
-    major, minor, patch = int(major), int(minor), int(patch)
-    # chardet >= 3.0.2, < 3.1.0
-    assert major == 3
-    assert minor < 1
-    assert patch >= 2
-
-
-def _check_cryptography(cryptography_version):
-    # cryptography < 1.3.4
-    try:
-        cryptography_version = list(map(int, cryptography_version.split('.')))
-    except ValueError:
-        return
-
-    if cryptography_version < [1, 3, 4]:
-        warning = 'Old version of cryptography ({}) may cause slowdown.'.format(cryptography_version)
-        warnings.warn(warning, RequestsDependencyWarning)
-
-# Check imported dependencies for compatibility.
-try:
-    check_compatibility(urllib3.__version__, chardet.__version__)
-except (AssertionError, ValueError):
-    warnings.warn("urllib3 ({}) or chardet ({}) doesn't match a supported "
-                  "version!".format(urllib3.__version__, chardet.__version__),
-                  RequestsDependencyWarning)
-
-# Attempt to enable urllib3's SNI support, if possible
-try:
-    from urllib3.contrib import pyopenssl
-    pyopenssl.inject_into_urllib3()
-
-    # Check cryptography version
-    from cryptography import __version__ as cryptography_version
-    _check_cryptography(cryptography_version)
-except ImportError:
-    pass
-
-# urllib3's DependencyWarnings should be silenced.
-from urllib3.exceptions import DependencyWarning
-warnings.simplefilter('ignore', DependencyWarning)
-
-from .__version__ import __title__, __description__, __url__, __version__
-from .__version__ import __build__, __author__, __author_email__, __license__
-from .__version__ import __copyright__, __cake__
-
-from . import utils
-from . import packages
-from .models import Request, Response, PreparedRequest
-from .api import request, get, head, post, patch, put, delete, options
-from .sessions import session, Session
-from .status_codes import codes
-from .exceptions import (
-    RequestException, Timeout, URLRequired,
-    TooManyRedirects, HTTPError, ConnectionError,
-    FileModeWarning, ConnectTimeout, ReadTimeout
-)
-
-# Set default logging handler to avoid "No handler found" warnings.
-import logging
-from logging import NullHandler
-
-logging.getLogger(__name__).addHandler(NullHandler())
-
-# FileModeWarnings go off per the default.
-warnings.simplefilter('default', FileModeWarning, append=True)
diff --git a/venv/lib/python3.7/site-packages/requests/__version__.py b/venv/lib/python3.7/site-packages/requests/__version__.py
deleted file mode 100644
index 9844f74..0000000
--- a/venv/lib/python3.7/site-packages/requests/__version__.py
+++ /dev/null
@@ -1,14 +0,0 @@
-# .-. .-. .-. . . .-. .-. .-. .-.
-# |(  |-  |.| | | |-  `-.  |  `-.
-# ' ' `-' `-`.`-' `-' `-'  '  `-'
-
-__title__ = 'requests'
-__description__ = 'Python HTTP for Humans.'
-__url__ = 'http://python-requests.org'
-__version__ = '2.22.0'
-__build__ = 0x022200
-__author__ = 'Kenneth Reitz'
-__author_email__ = 'me@kennethreitz.org'
-__license__ = 'Apache 2.0'
-__copyright__ = 'Copyright 2019 Kenneth Reitz'
-__cake__ = u'\u2728 \U0001f370 \u2728'
diff --git a/venv/lib/python3.7/site-packages/requests/_internal_utils.py b/venv/lib/python3.7/site-packages/requests/_internal_utils.py
deleted file mode 100644
index 759d9a5..0000000
--- a/venv/lib/python3.7/site-packages/requests/_internal_utils.py
+++ /dev/null
@@ -1,42 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-requests._internal_utils
-~~~~~~~~~~~~~~
-
-Provides utility functions that are consumed internally by Requests
-which depend on extremely few external helpers (such as compat)
-"""
-
-from .compat import is_py2, builtin_str, str
-
-
-def to_native_string(string, encoding='ascii'):
-    """Given a string object, regardless of type, returns a representation of
-    that string in the native string type, encoding and decoding where
-    necessary. This assumes ASCII unless told otherwise.
-    """
-    if isinstance(string, builtin_str):
-        out = string
-    else:
-        if is_py2:
-            out = string.encode(encoding)
-        else:
-            out = string.decode(encoding)
-
-    return out
-
-
-def unicode_is_ascii(u_string):
-    """Determine if unicode string only contains ASCII characters.
-
-    :param str u_string: unicode string to check. Must be unicode
-        and not Python 2 `str`.
-    :rtype: bool
-    """
-    assert isinstance(u_string, str)
-    try:
-        u_string.encode('ascii')
-        return True
-    except UnicodeEncodeError:
-        return False
diff --git a/venv/lib/python3.7/site-packages/requests/adapters.py b/venv/lib/python3.7/site-packages/requests/adapters.py
deleted file mode 100644
index fa4d9b3..0000000
--- a/venv/lib/python3.7/site-packages/requests/adapters.py
+++ /dev/null
@@ -1,533 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-requests.adapters
-~~~~~~~~~~~~~~~~~
-
-This module contains the transport adapters that Requests uses to define
-and maintain connections.
-"""
-
-import os.path
-import socket
-
-from urllib3.poolmanager import PoolManager, proxy_from_url
-from urllib3.response import HTTPResponse
-from urllib3.util import parse_url
-from urllib3.util import Timeout as TimeoutSauce
-from urllib3.util.retry import Retry
-from urllib3.exceptions import ClosedPoolError
-from urllib3.exceptions import ConnectTimeoutError
-from urllib3.exceptions import HTTPError as _HTTPError
-from urllib3.exceptions import MaxRetryError
-from urllib3.exceptions import NewConnectionError
-from urllib3.exceptions import ProxyError as _ProxyError
-from urllib3.exceptions import ProtocolError
-from urllib3.exceptions import ReadTimeoutError
-from urllib3.exceptions import SSLError as _SSLError
-from urllib3.exceptions import ResponseError
-from urllib3.exceptions import LocationValueError
-
-from .models import Response
-from .compat import urlparse, basestring
-from .utils import (DEFAULT_CA_BUNDLE_PATH, extract_zipped_paths,
-                    get_encoding_from_headers, prepend_scheme_if_needed,
-                    get_auth_from_url, urldefragauth, select_proxy)
-from .structures import CaseInsensitiveDict
-from .cookies import extract_cookies_to_jar
-from .exceptions import (ConnectionError, ConnectTimeout, ReadTimeout, SSLError,
-                         ProxyError, RetryError, InvalidSchema, InvalidProxyURL,
-                         InvalidURL)
-from .auth import _basic_auth_str
-
-try:
-    from urllib3.contrib.socks import SOCKSProxyManager
-except ImportError:
-    def SOCKSProxyManager(*args, **kwargs):
-        raise InvalidSchema("Missing dependencies for SOCKS support.")
-
-DEFAULT_POOLBLOCK = False
-DEFAULT_POOLSIZE = 10
-DEFAULT_RETRIES = 0
-DEFAULT_POOL_TIMEOUT = None
-
-
-class BaseAdapter(object):
-    """The Base Transport Adapter"""
-
-    def __init__(self):
-        super(BaseAdapter, self).__init__()
-
-    def send(self, request, stream=False, timeout=None, verify=True,
-             cert=None, proxies=None):
-        """Sends PreparedRequest object. Returns Response object.
-
-        :param request: The :class:`PreparedRequest <PreparedRequest>` being sent.
-        :param stream: (optional) Whether to stream the request content.
-        :param timeout: (optional) How long to wait for the server to send
-            data before giving up, as a float, or a :ref:`(connect timeout,
-            read timeout) <timeouts>` tuple.
-        :type timeout: float or tuple
-        :param verify: (optional) Either a boolean, in which case it controls whether we verify
-            the server's TLS certificate, or a string, in which case it must be a path
-            to a CA bundle to use
-        :param cert: (optional) Any user-provided SSL certificate to be trusted.
-        :param proxies: (optional) The proxies dictionary to apply to the request.
-        """
-        raise NotImplementedError
-
-    def close(self):
-        """Cleans up adapter specific items."""
-        raise NotImplementedError
-
-
-class HTTPAdapter(BaseAdapter):
-    """The built-in HTTP Adapter for urllib3.
-
-    Provides a general-case interface for Requests sessions to contact HTTP and
-    HTTPS urls by implementing the Transport Adapter interface. This class will
-    usually be created by the :class:`Session <Session>` class under the
-    covers.
-
-    :param pool_connections: The number of urllib3 connection pools to cache.
-    :param pool_maxsize: The maximum number of connections to save in the pool.
-    :param max_retries: The maximum number of retries each connection
-        should attempt. Note, this applies only to failed DNS lookups, socket
-        connections and connection timeouts, never to requests where data has
-        made it to the server. By default, Requests does not retry failed
-        connections. If you need granular control over the conditions under
-        which we retry a request, import urllib3's ``Retry`` class and pass
-        that instead.
-    :param pool_block: Whether the connection pool should block for connections.
-
-    Usage::
-
-      >>> import requests
-      >>> s = requests.Session()
-      >>> a = requests.adapters.HTTPAdapter(max_retries=3)
-      >>> s.mount('http://', a)
-    """
-    __attrs__ = ['max_retries', 'config', '_pool_connections', '_pool_maxsize',
-                 '_pool_block']
-
-    def __init__(self, pool_connections=DEFAULT_POOLSIZE,
-                 pool_maxsize=DEFAULT_POOLSIZE, max_retries=DEFAULT_RETRIES,
-                 pool_block=DEFAULT_POOLBLOCK):
-        if max_retries == DEFAULT_RETRIES:
-            self.max_retries = Retry(0, read=False)
-        else:
-            self.max_retries = Retry.from_int(max_retries)
-        self.config = {}
-        self.proxy_manager = {}
-
-        super(HTTPAdapter, self).__init__()
-
-        self._pool_connections = pool_connections
-        self._pool_maxsize = pool_maxsize
-        self._pool_block = pool_block
-
-        self.init_poolmanager(pool_connections, pool_maxsize, block=pool_block)
-
-    def __getstate__(self):
-        return {attr: getattr(self, attr, None) for attr in self.__attrs__}
-
-    def __setstate__(self, state):
-        # Can't handle by adding 'proxy_manager' to self.__attrs__ because
-        # self.poolmanager uses a lambda function, which isn't pickleable.
-        self.proxy_manager = {}
-        self.config = {}
-
-        for attr, value in state.items():
-            setattr(self, attr, value)
-
-        self.init_poolmanager(self._pool_connections, self._pool_maxsize,
-                              block=self._pool_block)
-
-    def init_poolmanager(self, connections, maxsize, block=DEFAULT_POOLBLOCK, **pool_kwargs):
-        """Initializes a urllib3 PoolManager.
-
-        This method should not be called from user code, and is only
-        exposed for use when subclassing the
-        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
-
-        :param connections: The number of urllib3 connection pools to cache.
-        :param maxsize: The maximum number of connections to save in the pool.
-        :param block: Block when no free connections are available.
-        :param pool_kwargs: Extra keyword arguments used to initialize the Pool Manager.
-        """
-        # save these values for pickling
-        self._pool_connections = connections
-        self._pool_maxsize = maxsize
-        self._pool_block = block
-
-        self.poolmanager = PoolManager(num_pools=connections, maxsize=maxsize,
-                                       block=block, strict=True, **pool_kwargs)
-
-    def proxy_manager_for(self, proxy, **proxy_kwargs):
-        """Return urllib3 ProxyManager for the given proxy.
-
-        This method should not be called from user code, and is only
-        exposed for use when subclassing the
-        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
-
-        :param proxy: The proxy to return a urllib3 ProxyManager for.
-        :param proxy_kwargs: Extra keyword arguments used to configure the Proxy Manager.
-        :returns: ProxyManager
-        :rtype: urllib3.ProxyManager
-        """
-        if proxy in self.proxy_manager:
-            manager = self.proxy_manager[proxy]
-        elif proxy.lower().startswith('socks'):
-            username, password = get_auth_from_url(proxy)
-            manager = self.proxy_manager[proxy] = SOCKSProxyManager(
-                proxy,
-                username=username,
-                password=password,
-                num_pools=self._pool_connections,
-                maxsize=self._pool_maxsize,
-                block=self._pool_block,
-                **proxy_kwargs
-            )
-        else:
-            proxy_headers = self.proxy_headers(proxy)
-            manager = self.proxy_manager[proxy] = proxy_from_url(
-                proxy,
-                proxy_headers=proxy_headers,
-                num_pools=self._pool_connections,
-                maxsize=self._pool_maxsize,
-                block=self._pool_block,
-                **proxy_kwargs)
-
-        return manager
-
-    def cert_verify(self, conn, url, verify, cert):
-        """Verify a SSL certificate. This method should not be called from user
-        code, and is only exposed for use when subclassing the
-        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
-
-        :param conn: The urllib3 connection object associated with the cert.
-        :param url: The requested URL.
-        :param verify: Either a boolean, in which case it controls whether we verify
-            the server's TLS certificate, or a string, in which case it must be a path
-            to a CA bundle to use
-        :param cert: The SSL certificate to verify.
-        """
-        if url.lower().startswith('https') and verify:
-
-            cert_loc = None
-
-            # Allow self-specified cert location.
-            if verify is not True:
-                cert_loc = verify
-
-            if not cert_loc:
-                cert_loc = extract_zipped_paths(DEFAULT_CA_BUNDLE_PATH)
-
-            if not cert_loc or not os.path.exists(cert_loc):
-                raise IOError("Could not find a suitable TLS CA certificate bundle, "
-                              "invalid path: {}".format(cert_loc))
-
-            conn.cert_reqs = 'CERT_REQUIRED'
-
-            if not os.path.isdir(cert_loc):
-                conn.ca_certs = cert_loc
-            else:
-                conn.ca_cert_dir = cert_loc
-        else:
-            conn.cert_reqs = 'CERT_NONE'
-            conn.ca_certs = None
-            conn.ca_cert_dir = None
-
-        if cert:
-            if not isinstance(cert, basestring):
-                conn.cert_file = cert[0]
-                conn.key_file = cert[1]
-            else:
-                conn.cert_file = cert
-                conn.key_file = None
-            if conn.cert_file and not os.path.exists(conn.cert_file):
-                raise IOError("Could not find the TLS certificate file, "
-                              "invalid path: {}".format(conn.cert_file))
-            if conn.key_file and not os.path.exists(conn.key_file):
-                raise IOError("Could not find the TLS key file, "
-                              "invalid path: {}".format(conn.key_file))
-
-    def build_response(self, req, resp):
-        """Builds a :class:`Response <requests.Response>` object from a urllib3
-        response. This should not be called from user code, and is only exposed
-        for use when subclassing the
-        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`
-
-        :param req: The :class:`PreparedRequest <PreparedRequest>` used to generate the response.
-        :param resp: The urllib3 response object.
-        :rtype: requests.Response
-        """
-        response = Response()
-
-        # Fallback to None if there's no status_code, for whatever reason.
-        response.status_code = getattr(resp, 'status', None)
-
-        # Make headers case-insensitive.
-        response.headers = CaseInsensitiveDict(getattr(resp, 'headers', {}))
-
-        # Set encoding.
-        response.encoding = get_encoding_from_headers(response.headers)
-        response.raw = resp
-        response.reason = response.raw.reason
-
-        if isinstance(req.url, bytes):
-            response.url = req.url.decode('utf-8')
-        else:
-            response.url = req.url
-
-        # Add new cookies from the server.
-        extract_cookies_to_jar(response.cookies, req, resp)
-
-        # Give the Response some context.
-        response.request = req
-        response.connection = self
-
-        return response
-
-    def get_connection(self, url, proxies=None):
-        """Returns a urllib3 connection for the given URL. This should not be
-        called from user code, and is only exposed for use when subclassing the
-        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
-
-        :param url: The URL to connect to.
-        :param proxies: (optional) A Requests-style dictionary of proxies used on this request.
-        :rtype: urllib3.ConnectionPool
-        """
-        proxy = select_proxy(url, proxies)
-
-        if proxy:
-            proxy = prepend_scheme_if_needed(proxy, 'http')
-            proxy_url = parse_url(proxy)
-            if not proxy_url.host:
-                raise InvalidProxyURL("Please check proxy URL. It is malformed"
-                                      " and could be missing the host.")
-            proxy_manager = self.proxy_manager_for(proxy)
-            conn = proxy_manager.connection_from_url(url)
-        else:
-            # Only scheme should be lower case
-            parsed = urlparse(url)
-            url = parsed.geturl()
-            conn = self.poolmanager.connection_from_url(url)
-
-        return conn
-
-    def close(self):
-        """Disposes of any internal state.
-
-        Currently, this closes the PoolManager and any active ProxyManager,
-        which closes any pooled connections.
-        """
-        self.poolmanager.clear()
-        for proxy in self.proxy_manager.values():
-            proxy.clear()
-
-    def request_url(self, request, proxies):
-        """Obtain the url to use when making the final request.
-
-        If the message is being sent through a HTTP proxy, the full URL has to
-        be used. Otherwise, we should only use the path portion of the URL.
-
-        This should not be called from user code, and is only exposed for use
-        when subclassing the
-        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
-
-        :param request: The :class:`PreparedRequest <PreparedRequest>` being sent.
-        :param proxies: A dictionary of schemes or schemes and hosts to proxy URLs.
-        :rtype: str
-        """
-        proxy = select_proxy(request.url, proxies)
-        scheme = urlparse(request.url).scheme
-
-        is_proxied_http_request = (proxy and scheme != 'https')
-        using_socks_proxy = False
-        if proxy:
-            proxy_scheme = urlparse(proxy).scheme.lower()
-            using_socks_proxy = proxy_scheme.startswith('socks')
-
-        url = request.path_url
-        if is_proxied_http_request and not using_socks_proxy:
-            url = urldefragauth(request.url)
-
-        return url
-
-    def add_headers(self, request, **kwargs):
-        """Add any headers needed by the connection. As of v2.0 this does
-        nothing by default, but is left for overriding by users that subclass
-        the :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
-
-        This should not be called from user code, and is only exposed for use
-        when subclassing the
-        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
-
-        :param request: The :class:`PreparedRequest <PreparedRequest>` to add headers to.
-        :param kwargs: The keyword arguments from the call to send().
-        """
-        pass
-
-    def proxy_headers(self, proxy):
-        """Returns a dictionary of the headers to add to any request sent
-        through a proxy. This works with urllib3 magic to ensure that they are
-        correctly sent to the proxy, rather than in a tunnelled request if
-        CONNECT is being used.
-
-        This should not be called from user code, and is only exposed for use
-        when subclassing the
-        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
-
-        :param proxy: The url of the proxy being used for this request.
-        :rtype: dict
-        """
-        headers = {}
-        username, password = get_auth_from_url(proxy)
-
-        if username:
-            headers['Proxy-Authorization'] = _basic_auth_str(username,
-                                                             password)
-
-        return headers
-
-    def send(self, request, stream=False, timeout=None, verify=True, cert=None, proxies=None):
-        """Sends PreparedRequest object. Returns Response object.
-
-        :param request: The :class:`PreparedRequest <PreparedRequest>` being sent.
-        :param stream: (optional) Whether to stream the request content.
-        :param timeout: (optional) How long to wait for the server to send
-            data before giving up, as a float, or a :ref:`(connect timeout,
-            read timeout) <timeouts>` tuple.
-        :type timeout: float or tuple or urllib3 Timeout object
-        :param verify: (optional) Either a boolean, in which case it controls whether
-            we verify the server's TLS certificate, or a string, in which case it
-            must be a path to a CA bundle to use
-        :param cert: (optional) Any user-provided SSL certificate to be trusted.
-        :param proxies: (optional) The proxies dictionary to apply to the request.
-        :rtype: requests.Response
-        """
-
-        try:
-            conn = self.get_connection(request.url, proxies)
-        except LocationValueError as e:
-            raise InvalidURL(e, request=request)
-
-        self.cert_verify(conn, request.url, verify, cert)
-        url = self.request_url(request, proxies)
-        self.add_headers(request, stream=stream, timeout=timeout, verify=verify, cert=cert, proxies=proxies)
-
-        chunked = not (request.body is None or 'Content-Length' in request.headers)
-
-        if isinstance(timeout, tuple):
-            try:
-                connect, read = timeout
-                timeout = TimeoutSauce(connect=connect, read=read)
-            except ValueError as e:
-                # this may raise a string formatting error.
-                err = ("Invalid timeout {}. Pass a (connect, read) "
-                       "timeout tuple, or a single float to set "
-                       "both timeouts to the same value".format(timeout))
-                raise ValueError(err)
-        elif isinstance(timeout, TimeoutSauce):
-            pass
-        else:
-            timeout = TimeoutSauce(connect=timeout, read=timeout)
-
-        try:
-            if not chunked:
-                resp = conn.urlopen(
-                    method=request.method,
-                    url=url,
-                    body=request.body,
-                    headers=request.headers,
-                    redirect=False,
-                    assert_same_host=False,
-                    preload_content=False,
-                    decode_content=False,
-                    retries=self.max_retries,
-                    timeout=timeout
-                )
-
-            # Send the request.
-            else:
-                if hasattr(conn, 'proxy_pool'):
-                    conn = conn.proxy_pool
-
-                low_conn = conn._get_conn(timeout=DEFAULT_POOL_TIMEOUT)
-
-                try:
-                    low_conn.putrequest(request.method,
-                                        url,
-                                        skip_accept_encoding=True)
-
-                    for header, value in request.headers.items():
-                        low_conn.putheader(header, value)
-
-                    low_conn.endheaders()
-
-                    for i in request.body:
-                        low_conn.send(hex(len(i))[2:].encode('utf-8'))
-                        low_conn.send(b'\r\n')
-                        low_conn.send(i)
-                        low_conn.send(b'\r\n')
-                    low_conn.send(b'0\r\n\r\n')
-
-                    # Receive the response from the server
-                    try:
-                        # For Python 2.7, use buffering of HTTP responses
-                        r = low_conn.getresponse(buffering=True)
-                    except TypeError:
-                        # For compatibility with Python 3.3+
-                        r = low_conn.getresponse()
-
-                    resp = HTTPResponse.from_httplib(
-                        r,
-                        pool=conn,
-                        connection=low_conn,
-                        preload_content=False,
-                        decode_content=False
-                    )
-                except:
-                    # If we hit any problems here, clean up the connection.
-                    # Then, reraise so that we can handle the actual exception.
-                    low_conn.close()
-                    raise
-
-        except (ProtocolError, socket.error) as err:
-            raise ConnectionError(err, request=request)
-
-        except MaxRetryError as e:
-            if isinstance(e.reason, ConnectTimeoutError):
-                # TODO: Remove this in 3.0.0: see #2811
-                if not isinstance(e.reason, NewConnectionError):
-                    raise ConnectTimeout(e, request=request)
-
-            if isinstance(e.reason, ResponseError):
-                raise RetryError(e, request=request)
-
-            if isinstance(e.reason, _ProxyError):
-                raise ProxyError(e, request=request)
-
-            if isinstance(e.reason, _SSLError):
-                # This branch is for urllib3 v1.22 and later.
-                raise SSLError(e, request=request)
-
-            raise ConnectionError(e, request=request)
-
-        except ClosedPoolError as e:
-            raise ConnectionError(e, request=request)
-
-        except _ProxyError as e:
-            raise ProxyError(e)
-
-        except (_SSLError, _HTTPError) as e:
-            if isinstance(e, _SSLError):
-                # This branch is for urllib3 versions earlier than v1.22
-                raise SSLError(e, request=request)
-            elif isinstance(e, ReadTimeoutError):
-                raise ReadTimeout(e, request=request)
-            else:
-                raise
-
-        return self.build_response(request, resp)
diff --git a/venv/lib/python3.7/site-packages/requests/api.py b/venv/lib/python3.7/site-packages/requests/api.py
deleted file mode 100644
index ef71d07..0000000
--- a/venv/lib/python3.7/site-packages/requests/api.py
+++ /dev/null
@@ -1,158 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-requests.api
-~~~~~~~~~~~~
-
-This module implements the Requests API.
-
-:copyright: (c) 2012 by Kenneth Reitz.
-:license: Apache2, see LICENSE for more details.
-"""
-
-from . import sessions
-
-
-def request(method, url, **kwargs):
-    """Constructs and sends a :class:`Request <Request>`.
-
-    :param method: method for the new :class:`Request` object.
-    :param url: URL for the new :class:`Request` object.
-    :param params: (optional) Dictionary, list of tuples or bytes to send
-        in the query string for the :class:`Request`.
-    :param data: (optional) Dictionary, list of tuples, bytes, or file-like
-        object to send in the body of the :class:`Request`.
-    :param json: (optional) A JSON serializable Python object to send in the body of the :class:`Request`.
-    :param headers: (optional) Dictionary of HTTP Headers to send with the :class:`Request`.
-    :param cookies: (optional) Dict or CookieJar object to send with the :class:`Request`.
-    :param files: (optional) Dictionary of ``'name': file-like-objects`` (or ``{'name': file-tuple}``) for multipart encoding upload.
-        ``file-tuple`` can be a 2-tuple ``('filename', fileobj)``, 3-tuple ``('filename', fileobj, 'content_type')``
-        or a 4-tuple ``('filename', fileobj, 'content_type', custom_headers)``, where ``'content-type'`` is a string
-        defining the content type of the given file and ``custom_headers`` a dict-like object containing additional headers
-        to add for the file.
-    :param auth: (optional) Auth tuple to enable Basic/Digest/Custom HTTP Auth.
-    :param timeout: (optional) How many seconds to wait for the server to send data
-        before giving up, as a float, or a :ref:`(connect timeout, read
-        timeout) <timeouts>` tuple.
-    :type timeout: float or tuple
-    :param allow_redirects: (optional) Boolean. Enable/disable GET/OPTIONS/POST/PUT/PATCH/DELETE/HEAD redirection. Defaults to ``True``.
-    :type allow_redirects: bool
-    :param proxies: (optional) Dictionary mapping protocol to the URL of the proxy.
-    :param verify: (optional) Either a boolean, in which case it controls whether we verify
-            the server's TLS certificate, or a string, in which case it must be a path
-            to a CA bundle to use. Defaults to ``True``.
-    :param stream: (optional) if ``False``, the response content will be immediately downloaded.
-    :param cert: (optional) if String, path to ssl client cert file (.pem). If Tuple, ('cert', 'key') pair.
-    :return: :class:`Response <Response>` object
-    :rtype: requests.Response
-
-    Usage::
-
-      >>> import requests
-      >>> req = requests.request('GET', 'https://httpbin.org/get')
-      <Response [200]>
-    """
-
-    # By using the 'with' statement we are sure the session is closed, thus we
-    # avoid leaving sockets open which can trigger a ResourceWarning in some
-    # cases, and look like a memory leak in others.
-    with sessions.Session() as session:
-        return session.request(method=method, url=url, **kwargs)
-
-
-def get(url, params=None, **kwargs):
-    r"""Sends a GET request.
-
-    :param url: URL for the new :class:`Request` object.
-    :param params: (optional) Dictionary, list of tuples or bytes to send
-        in the query string for the :class:`Request`.
-    :param \*\*kwargs: Optional arguments that ``request`` takes.
-    :return: :class:`Response <Response>` object
-    :rtype: requests.Response
-    """
-
-    kwargs.setdefault('allow_redirects', True)
-    return request('get', url, params=params, **kwargs)
-
-
-def options(url, **kwargs):
-    r"""Sends an OPTIONS request.
-
-    :param url: URL for the new :class:`Request` object.
-    :param \*\*kwargs: Optional arguments that ``request`` takes.
-    :return: :class:`Response <Response>` object
-    :rtype: requests.Response
-    """
-
-    kwargs.setdefault('allow_redirects', True)
-    return request('options', url, **kwargs)
-
-
-def head(url, **kwargs):
-    r"""Sends a HEAD request.
-
-    :param url: URL for the new :class:`Request` object.
-    :param \*\*kwargs: Optional arguments that ``request`` takes.
-    :return: :class:`Response <Response>` object
-    :rtype: requests.Response
-    """
-
-    kwargs.setdefault('allow_redirects', False)
-    return request('head', url, **kwargs)
-
-
-def post(url, data=None, json=None, **kwargs):
-    r"""Sends a POST request.
-
-    :param url: URL for the new :class:`Request` object.
-    :param data: (optional) Dictionary, list of tuples, bytes, or file-like
-        object to send in the body of the :class:`Request`.
-    :param json: (optional) json data to send in the body of the :class:`Request`.
-    :param \*\*kwargs: Optional arguments that ``request`` takes.
-    :return: :class:`Response <Response>` object
-    :rtype: requests.Response
-    """
-
-    return request('post', url, data=data, json=json, **kwargs)
-
-
-def put(url, data=None, **kwargs):
-    r"""Sends a PUT request.
-
-    :param url: URL for the new :class:`Request` object.
-    :param data: (optional) Dictionary, list of tuples, bytes, or file-like
-        object to send in the body of the :class:`Request`.
-    :param json: (optional) json data to send in the body of the :class:`Request`.
-    :param \*\*kwargs: Optional arguments that ``request`` takes.
-    :return: :class:`Response <Response>` object
-    :rtype: requests.Response
-    """
-
-    return request('put', url, data=data, **kwargs)
-
-
-def patch(url, data=None, **kwargs):
-    r"""Sends a PATCH request.
-
-    :param url: URL for the new :class:`Request` object.
-    :param data: (optional) Dictionary, list of tuples, bytes, or file-like
-        object to send in the body of the :class:`Request`.
-    :param json: (optional) json data to send in the body of the :class:`Request`.
-    :param \*\*kwargs: Optional arguments that ``request`` takes.
-    :return: :class:`Response <Response>` object
-    :rtype: requests.Response
-    """
-
-    return request('patch', url, data=data, **kwargs)
-
-
-def delete(url, **kwargs):
-    r"""Sends a DELETE request.
-
-    :param url: URL for the new :class:`Request` object.
-    :param \*\*kwargs: Optional arguments that ``request`` takes.
-    :return: :class:`Response <Response>` object
-    :rtype: requests.Response
-    """
-
-    return request('delete', url, **kwargs)
diff --git a/venv/lib/python3.7/site-packages/requests/auth.py b/venv/lib/python3.7/site-packages/requests/auth.py
deleted file mode 100644
index bdde51c..0000000
--- a/venv/lib/python3.7/site-packages/requests/auth.py
+++ /dev/null
@@ -1,305 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-requests.auth
-~~~~~~~~~~~~~
-
-This module contains the authentication handlers for Requests.
-"""
-
-import os
-import re
-import time
-import hashlib
-import threading
-import warnings
-
-from base64 import b64encode
-
-from .compat import urlparse, str, basestring
-from .cookies import extract_cookies_to_jar
-from ._internal_utils import to_native_string
-from .utils import parse_dict_header
-
-CONTENT_TYPE_FORM_URLENCODED = 'application/x-www-form-urlencoded'
-CONTENT_TYPE_MULTI_PART = 'multipart/form-data'
-
-
-def _basic_auth_str(username, password):
-    """Returns a Basic Auth string."""
-
-    # "I want us to put a big-ol' comment on top of it that
-    # says that this behaviour is dumb but we need to preserve
-    # it because people are relying on it."
-    #    - Lukasa
-    #
-    # These are here solely to maintain backwards compatibility
-    # for things like ints. This will be removed in 3.0.0.
-    if not isinstance(username, basestring):
-        warnings.warn(
-            "Non-string usernames will no longer be supported in Requests "
-            "3.0.0. Please convert the object you've passed in ({!r}) to "
-            "a string or bytes object in the near future to avoid "
-            "problems.".format(username),
-            category=DeprecationWarning,
-        )
-        username = str(username)
-
-    if not isinstance(password, basestring):
-        warnings.warn(
-            "Non-string passwords will no longer be supported in Requests "
-            "3.0.0. Please convert the object you've passed in ({!r}) to "
-            "a string or bytes object in the near future to avoid "
-            "problems.".format(password),
-            category=DeprecationWarning,
-        )
-        password = str(password)
-    # -- End Removal --
-
-    if isinstance(username, str):
-        username = username.encode('latin1')
-
-    if isinstance(password, str):
-        password = password.encode('latin1')
-
-    authstr = 'Basic ' + to_native_string(
-        b64encode(b':'.join((username, password))).strip()
-    )
-
-    return authstr
-
-
-class AuthBase(object):
-    """Base class that all auth implementations derive from"""
-
-    def __call__(self, r):
-        raise NotImplementedError('Auth hooks must be callable.')
-
-
-class HTTPBasicAuth(AuthBase):
-    """Attaches HTTP Basic Authentication to the given Request object."""
-
-    def __init__(self, username, password):
-        self.username = username
-        self.password = password
-
-    def __eq__(self, other):
-        return all([
-            self.username == getattr(other, 'username', None),
-            self.password == getattr(other, 'password', None)
-        ])
-
-    def __ne__(self, other):
-        return not self == other
-
-    def __call__(self, r):
-        r.headers['Authorization'] = _basic_auth_str(self.username, self.password)
-        return r
-
-
-class HTTPProxyAuth(HTTPBasicAuth):
-    """Attaches HTTP Proxy Authentication to a given Request object."""
-
-    def __call__(self, r):
-        r.headers['Proxy-Authorization'] = _basic_auth_str(self.username, self.password)
-        return r
-
-
-class HTTPDigestAuth(AuthBase):
-    """Attaches HTTP Digest Authentication to the given Request object."""
-
-    def __init__(self, username, password):
-        self.username = username
-        self.password = password
-        # Keep state in per-thread local storage
-        self._thread_local = threading.local()
-
-    def init_per_thread_state(self):
-        # Ensure state is initialized just once per-thread
-        if not hasattr(self._thread_local, 'init'):
-            self._thread_local.init = True
-            self._thread_local.last_nonce = ''
-            self._thread_local.nonce_count = 0
-            self._thread_local.chal = {}
-            self._thread_local.pos = None
-            self._thread_local.num_401_calls = None
-
-    def build_digest_header(self, method, url):
-        """
-        :rtype: str
-        """
-
-        realm = self._thread_local.chal['realm']
-        nonce = self._thread_local.chal['nonce']
-        qop = self._thread_local.chal.get('qop')
-        algorithm = self._thread_local.chal.get('algorithm')
-        opaque = self._thread_local.chal.get('opaque')
-        hash_utf8 = None
-
-        if algorithm is None:
-            _algorithm = 'MD5'
-        else:
-            _algorithm = algorithm.upper()
-        # lambdas assume digest modules are imported at the top level
-        if _algorithm == 'MD5' or _algorithm == 'MD5-SESS':
-            def md5_utf8(x):
-                if isinstance(x, str):
-                    x = x.encode('utf-8')
-                return hashlib.md5(x).hexdigest()
-            hash_utf8 = md5_utf8
-        elif _algorithm == 'SHA':
-            def sha_utf8(x):
-                if isinstance(x, str):
-                    x = x.encode('utf-8')
-                return hashlib.sha1(x).hexdigest()
-            hash_utf8 = sha_utf8
-        elif _algorithm == 'SHA-256':
-            def sha256_utf8(x):
-                if isinstance(x, str):
-                    x = x.encode('utf-8')
-                return hashlib.sha256(x).hexdigest()
-            hash_utf8 = sha256_utf8
-        elif _algorithm == 'SHA-512':
-            def sha512_utf8(x):
-                if isinstance(x, str):
-                    x = x.encode('utf-8')
-                return hashlib.sha512(x).hexdigest()
-            hash_utf8 = sha512_utf8
-
-        KD = lambda s, d: hash_utf8("%s:%s" % (s, d))
-
-        if hash_utf8 is None:
-            return None
-
-        # XXX not implemented yet
-        entdig = None
-        p_parsed = urlparse(url)
-        #: path is request-uri defined in RFC 2616 which should not be empty
-        path = p_parsed.path or "/"
-        if p_parsed.query:
-            path += '?' + p_parsed.query
-
-        A1 = '%s:%s:%s' % (self.username, realm, self.password)
-        A2 = '%s:%s' % (method, path)
-
-        HA1 = hash_utf8(A1)
-        HA2 = hash_utf8(A2)
-
-        if nonce == self._thread_local.last_nonce:
-            self._thread_local.nonce_count += 1
-        else:
-            self._thread_local.nonce_count = 1
-        ncvalue = '%08x' % self._thread_local.nonce_count
-        s = str(self._thread_local.nonce_count).encode('utf-8')
-        s += nonce.encode('utf-8')
-        s += time.ctime().encode('utf-8')
-        s += os.urandom(8)
-
-        cnonce = (hashlib.sha1(s).hexdigest()[:16])
-        if _algorithm == 'MD5-SESS':
-            HA1 = hash_utf8('%s:%s:%s' % (HA1, nonce, cnonce))
-
-        if not qop:
-            respdig = KD(HA1, "%s:%s" % (nonce, HA2))
-        elif qop == 'auth' or 'auth' in qop.split(','):
-            noncebit = "%s:%s:%s:%s:%s" % (
-                nonce, ncvalue, cnonce, 'auth', HA2
-            )
-            respdig = KD(HA1, noncebit)
-        else:
-            # XXX handle auth-int.
-            return None
-
-        self._thread_local.last_nonce = nonce
-
-        # XXX should the partial digests be encoded too?
-        base = 'username="%s", realm="%s", nonce="%s", uri="%s", ' \
-               'response="%s"' % (self.username, realm, nonce, path, respdig)
-        if opaque:
-            base += ', opaque="%s"' % opaque
-        if algorithm:
-            base += ', algorithm="%s"' % algorithm
-        if entdig:
-            base += ', digest="%s"' % entdig
-        if qop:
-            base += ', qop="auth", nc=%s, cnonce="%s"' % (ncvalue, cnonce)
-
-        return 'Digest %s' % (base)
-
-    def handle_redirect(self, r, **kwargs):
-        """Reset num_401_calls counter on redirects."""
-        if r.is_redirect:
-            self._thread_local.num_401_calls = 1
-
-    def handle_401(self, r, **kwargs):
-        """
-        Takes the given response and tries digest-auth, if needed.
-
-        :rtype: requests.Response
-        """
-
-        # If response is not 4xx, do not auth
-        # See https://github.com/requests/requests/issues/3772
-        if not 400 <= r.status_code < 500:
-            self._thread_local.num_401_calls = 1
-            return r
-
-        if self._thread_local.pos is not None:
-            # Rewind the file position indicator of the body to where
-            # it was to resend the request.
-            r.request.body.seek(self._thread_local.pos)
-        s_auth = r.headers.get('www-authenticate', '')
-
-        if 'digest' in s_auth.lower() and self._thread_local.num_401_calls < 2:
-
-            self._thread_local.num_401_calls += 1
-            pat = re.compile(r'digest ', flags=re.IGNORECASE)
-            self._thread_local.chal = parse_dict_header(pat.sub('', s_auth, count=1))
-
-            # Consume content and release the original connection
-            # to allow our new request to reuse the same one.
-            r.content
-            r.close()
-            prep = r.request.copy()
-            extract_cookies_to_jar(prep._cookies, r.request, r.raw)
-            prep.prepare_cookies(prep._cookies)
-
-            prep.headers['Authorization'] = self.build_digest_header(
-                prep.method, prep.url)
-            _r = r.connection.send(prep, **kwargs)
-            _r.history.append(r)
-            _r.request = prep
-
-            return _r
-
-        self._thread_local.num_401_calls = 1
-        return r
-
-    def __call__(self, r):
-        # Initialize per-thread state, if needed
-        self.init_per_thread_state()
-        # If we have a saved nonce, skip the 401
-        if self._thread_local.last_nonce:
-            r.headers['Authorization'] = self.build_digest_header(r.method, r.url)
-        try:
-            self._thread_local.pos = r.body.tell()
-        except AttributeError:
-            # In the case of HTTPDigestAuth being reused and the body of
-            # the previous request was a file-like object, pos has the
-            # file position of the previous body. Ensure it's set to
-            # None.
-            self._thread_local.pos = None
-        r.register_hook('response', self.handle_401)
-        r.register_hook('response', self.handle_redirect)
-        self._thread_local.num_401_calls = 1
-
-        return r
-
-    def __eq__(self, other):
-        return all([
-            self.username == getattr(other, 'username', None),
-            self.password == getattr(other, 'password', None)
-        ])
-
-    def __ne__(self, other):
-        return not self == other
diff --git a/venv/lib/python3.7/site-packages/requests/certs.py b/venv/lib/python3.7/site-packages/requests/certs.py
deleted file mode 100644
index d1a378d..0000000
--- a/venv/lib/python3.7/site-packages/requests/certs.py
+++ /dev/null
@@ -1,18 +0,0 @@
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-
-"""
-requests.certs
-~~~~~~~~~~~~~~
-
-This module returns the preferred default CA certificate bundle. There is
-only one — the one from the certifi package.
-
-If you are packaging Requests, e.g., for a Linux distribution or a managed
-environment, you can change the definition of where() to return a separately
-packaged CA bundle.
-"""
-from certifi import where
-
-if __name__ == '__main__':
-    print(where())
diff --git a/venv/lib/python3.7/site-packages/requests/compat.py b/venv/lib/python3.7/site-packages/requests/compat.py
deleted file mode 100644
index c44b35e..0000000
--- a/venv/lib/python3.7/site-packages/requests/compat.py
+++ /dev/null
@@ -1,70 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-requests.compat
-~~~~~~~~~~~~~~~
-
-This module handles import compatibility issues between Python 2 and
-Python 3.
-"""
-
-import chardet
-
-import sys
-
-# -------
-# Pythons
-# -------
-
-# Syntax sugar.
-_ver = sys.version_info
-
-#: Python 2.x?
-is_py2 = (_ver[0] == 2)
-
-#: Python 3.x?
-is_py3 = (_ver[0] == 3)
-
-try:
-    import simplejson as json
-except ImportError:
-    import json
-
-# ---------
-# Specifics
-# ---------
-
-if is_py2:
-    from urllib import (
-        quote, unquote, quote_plus, unquote_plus, urlencode, getproxies,
-        proxy_bypass, proxy_bypass_environment, getproxies_environment)
-    from urlparse import urlparse, urlunparse, urljoin, urlsplit, urldefrag
-    from urllib2 import parse_http_list
-    import cookielib
-    from Cookie import Morsel
-    from StringIO import StringIO
-    from collections import Callable, Mapping, MutableMapping, OrderedDict
-
-
-    builtin_str = str
-    bytes = str
-    str = unicode
-    basestring = basestring
-    numeric_types = (int, long, float)
-    integer_types = (int, long)
-
-elif is_py3:
-    from urllib.parse import urlparse, urlunparse, urljoin, urlsplit, urlencode, quote, unquote, quote_plus, unquote_plus, urldefrag
-    from urllib.request import parse_http_list, getproxies, proxy_bypass, proxy_bypass_environment, getproxies_environment
-    from http import cookiejar as cookielib
-    from http.cookies import Morsel
-    from io import StringIO
-    from collections import OrderedDict
-    from collections.abc import Callable, Mapping, MutableMapping
-
-    builtin_str = str
-    str = str
-    bytes = bytes
-    basestring = (str, bytes)
-    numeric_types = (int, float)
-    integer_types = (int,)
diff --git a/venv/lib/python3.7/site-packages/requests/cookies.py b/venv/lib/python3.7/site-packages/requests/cookies.py
deleted file mode 100644
index 56fccd9..0000000
--- a/venv/lib/python3.7/site-packages/requests/cookies.py
+++ /dev/null
@@ -1,549 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-requests.cookies
-~~~~~~~~~~~~~~~~
-
-Compatibility code to be able to use `cookielib.CookieJar` with requests.
-
-requests.utils imports from here, so be careful with imports.
-"""
-
-import copy
-import time
-import calendar
-
-from ._internal_utils import to_native_string
-from .compat import cookielib, urlparse, urlunparse, Morsel, MutableMapping
-
-try:
-    import threading
-except ImportError:
-    import dummy_threading as threading
-
-
-class MockRequest(object):
-    """Wraps a `requests.Request` to mimic a `urllib2.Request`.
-
-    The code in `cookielib.CookieJar` expects this interface in order to correctly
-    manage cookie policies, i.e., determine whether a cookie can be set, given the
-    domains of the request and the cookie.
-
-    The original request object is read-only. The client is responsible for collecting
-    the new headers via `get_new_headers()` and interpreting them appropriately. You
-    probably want `get_cookie_header`, defined below.
-    """
-
-    def __init__(self, request):
-        self._r = request
-        self._new_headers = {}
-        self.type = urlparse(self._r.url).scheme
-
-    def get_type(self):
-        return self.type
-
-    def get_host(self):
-        return urlparse(self._r.url).netloc
-
-    def get_origin_req_host(self):
-        return self.get_host()
-
-    def get_full_url(self):
-        # Only return the response's URL if the user hadn't set the Host
-        # header
-        if not self._r.headers.get('Host'):
-            return self._r.url
-        # If they did set it, retrieve it and reconstruct the expected domain
-        host = to_native_string(self._r.headers['Host'], encoding='utf-8')
-        parsed = urlparse(self._r.url)
-        # Reconstruct the URL as we expect it
-        return urlunparse([
-            parsed.scheme, host, parsed.path, parsed.params, parsed.query,
-            parsed.fragment
-        ])
-
-    def is_unverifiable(self):
-        return True
-
-    def has_header(self, name):
-        return name in self._r.headers or name in self._new_headers
-
-    def get_header(self, name, default=None):
-        return self._r.headers.get(name, self._new_headers.get(name, default))
-
-    def add_header(self, key, val):
-        """cookielib has no legitimate use for this method; add it back if you find one."""
-        raise NotImplementedError("Cookie headers should be added with add_unredirected_header()")
-
-    def add_unredirected_header(self, name, value):
-        self._new_headers[name] = value
-
-    def get_new_headers(self):
-        return self._new_headers
-
-    @property
-    def unverifiable(self):
-        return self.is_unverifiable()
-
-    @property
-    def origin_req_host(self):
-        return self.get_origin_req_host()
-
-    @property
-    def host(self):
-        return self.get_host()
-
-
-class MockResponse(object):
-    """Wraps a `httplib.HTTPMessage` to mimic a `urllib.addinfourl`.
-
-    ...what? Basically, expose the parsed HTTP headers from the server response
-    the way `cookielib` expects to see them.
-    """
-
-    def __init__(self, headers):
-        """Make a MockResponse for `cookielib` to read.
-
-        :param headers: a httplib.HTTPMessage or analogous carrying the headers
-        """
-        self._headers = headers
-
-    def info(self):
-        return self._headers
-
-    def getheaders(self, name):
-        self._headers.getheaders(name)
-
-
-def extract_cookies_to_jar(jar, request, response):
-    """Extract the cookies from the response into a CookieJar.
-
-    :param jar: cookielib.CookieJar (not necessarily a RequestsCookieJar)
-    :param request: our own requests.Request object
-    :param response: urllib3.HTTPResponse object
-    """
-    if not (hasattr(response, '_original_response') and
-            response._original_response):
-        return
-    # the _original_response field is the wrapped httplib.HTTPResponse object,
-    req = MockRequest(request)
-    # pull out the HTTPMessage with the headers and put it in the mock:
-    res = MockResponse(response._original_response.msg)
-    jar.extract_cookies(res, req)
-
-
-def get_cookie_header(jar, request):
-    """
-    Produce an appropriate Cookie header string to be sent with `request`, or None.
-
-    :rtype: str
-    """
-    r = MockRequest(request)
-    jar.add_cookie_header(r)
-    return r.get_new_headers().get('Cookie')
-
-
-def remove_cookie_by_name(cookiejar, name, domain=None, path=None):
-    """Unsets a cookie by name, by default over all domains and paths.
-
-    Wraps CookieJar.clear(), is O(n).
-    """
-    clearables = []
-    for cookie in cookiejar:
-        if cookie.name != name:
-            continue
-        if domain is not None and domain != cookie.domain:
-            continue
-        if path is not None and path != cookie.path:
-            continue
-        clearables.append((cookie.domain, cookie.path, cookie.name))
-
-    for domain, path, name in clearables:
-        cookiejar.clear(domain, path, name)
-
-
-class CookieConflictError(RuntimeError):
-    """There are two cookies that meet the criteria specified in the cookie jar.
-    Use .get and .set and include domain and path args in order to be more specific.
-    """
-
-
-class RequestsCookieJar(cookielib.CookieJar, MutableMapping):
-    """Compatibility class; is a cookielib.CookieJar, but exposes a dict
-    interface.
-
-    This is the CookieJar we create by default for requests and sessions that
-    don't specify one, since some clients may expect response.cookies and
-    session.cookies to support dict operations.
-
-    Requests does not use the dict interface internally; it's just for
-    compatibility with external client code. All requests code should work
-    out of the box with externally provided instances of ``CookieJar``, e.g.
-    ``LWPCookieJar`` and ``FileCookieJar``.
-
-    Unlike a regular CookieJar, this class is pickleable.
-
-    .. warning:: dictionary operations that are normally O(1) may be O(n).
-    """
-
-    def get(self, name, default=None, domain=None, path=None):
-        """Dict-like get() that also supports optional domain and path args in
-        order to resolve naming collisions from using one cookie jar over
-        multiple domains.
-
-        .. warning:: operation is O(n), not O(1).
-        """
-        try:
-            return self._find_no_duplicates(name, domain, path)
-        except KeyError:
-            return default
-
-    def set(self, name, value, **kwargs):
-        """Dict-like set() that also supports optional domain and path args in
-        order to resolve naming collisions from using one cookie jar over
-        multiple domains.
-        """
-        # support client code that unsets cookies by assignment of a None value:
-        if value is None:
-            remove_cookie_by_name(self, name, domain=kwargs.get('domain'), path=kwargs.get('path'))
-            return
-
-        if isinstance(value, Morsel):
-            c = morsel_to_cookie(value)
-        else:
-            c = create_cookie(name, value, **kwargs)
-        self.set_cookie(c)
-        return c
-
-    def iterkeys(self):
-        """Dict-like iterkeys() that returns an iterator of names of cookies
-        from the jar.
-
-        .. seealso:: itervalues() and iteritems().
-        """
-        for cookie in iter(self):
-            yield cookie.name
-
-    def keys(self):
-        """Dict-like keys() that returns a list of names of cookies from the
-        jar.
-
-        .. seealso:: values() and items().
-        """
-        return list(self.iterkeys())
-
-    def itervalues(self):
-        """Dict-like itervalues() that returns an iterator of values of cookies
-        from the jar.
-
-        .. seealso:: iterkeys() and iteritems().
-        """
-        for cookie in iter(self):
-            yield cookie.value
-
-    def values(self):
-        """Dict-like values() that returns a list of values of cookies from the
-        jar.
-
-        .. seealso:: keys() and items().
-        """
-        return list(self.itervalues())
-
-    def iteritems(self):
-        """Dict-like iteritems() that returns an iterator of name-value tuples
-        from the jar.
-
-        .. seealso:: iterkeys() and itervalues().
-        """
-        for cookie in iter(self):
-            yield cookie.name, cookie.value
-
-    def items(self):
-        """Dict-like items() that returns a list of name-value tuples from the
-        jar. Allows client-code to call ``dict(RequestsCookieJar)`` and get a
-        vanilla python dict of key value pairs.
-
-        .. seealso:: keys() and values().
-        """
-        return list(self.iteritems())
-
-    def list_domains(self):
-        """Utility method to list all the domains in the jar."""
-        domains = []
-        for cookie in iter(self):
-            if cookie.domain not in domains:
-                domains.append(cookie.domain)
-        return domains
-
-    def list_paths(self):
-        """Utility method to list all the paths in the jar."""
-        paths = []
-        for cookie in iter(self):
-            if cookie.path not in paths:
-                paths.append(cookie.path)
-        return paths
-
-    def multiple_domains(self):
-        """Returns True if there are multiple domains in the jar.
-        Returns False otherwise.
-
-        :rtype: bool
-        """
-        domains = []
-        for cookie in iter(self):
-            if cookie.domain is not None and cookie.domain in domains:
-                return True
-            domains.append(cookie.domain)
-        return False  # there is only one domain in jar
-
-    def get_dict(self, domain=None, path=None):
-        """Takes as an argument an optional domain and path and returns a plain
-        old Python dict of name-value pairs of cookies that meet the
-        requirements.
-
-        :rtype: dict
-        """
-        dictionary = {}
-        for cookie in iter(self):
-            if (
-                (domain is None or cookie.domain == domain) and
-                (path is None or cookie.path == path)
-            ):
-                dictionary[cookie.name] = cookie.value
-        return dictionary
-
-    def __contains__(self, name):
-        try:
-            return super(RequestsCookieJar, self).__contains__(name)
-        except CookieConflictError:
-            return True
-
-    def __getitem__(self, name):
-        """Dict-like __getitem__() for compatibility with client code. Throws
-        exception if there are more than one cookie with name. In that case,
-        use the more explicit get() method instead.
-
-        .. warning:: operation is O(n), not O(1).
-        """
-        return self._find_no_duplicates(name)
-
-    def __setitem__(self, name, value):
-        """Dict-like __setitem__ for compatibility with client code. Throws
-        exception if there is already a cookie of that name in the jar. In that
-        case, use the more explicit set() method instead.
-        """
-        self.set(name, value)
-
-    def __delitem__(self, name):
-        """Deletes a cookie given a name. Wraps ``cookielib.CookieJar``'s
-        ``remove_cookie_by_name()``.
-        """
-        remove_cookie_by_name(self, name)
-
-    def set_cookie(self, cookie, *args, **kwargs):
-        if hasattr(cookie.value, 'startswith') and cookie.value.startswith('"') and cookie.value.endswith('"'):
-            cookie.value = cookie.value.replace('\\"', '')
-        return super(RequestsCookieJar, self).set_cookie(cookie, *args, **kwargs)
-
-    def update(self, other):
-        """Updates this jar with cookies from another CookieJar or dict-like"""
-        if isinstance(other, cookielib.CookieJar):
-            for cookie in other:
-                self.set_cookie(copy.copy(cookie))
-        else:
-            super(RequestsCookieJar, self).update(other)
-
-    def _find(self, name, domain=None, path=None):
-        """Requests uses this method internally to get cookie values.
-
-        If there are conflicting cookies, _find arbitrarily chooses one.
-        See _find_no_duplicates if you want an exception thrown if there are
-        conflicting cookies.
-
-        :param name: a string containing name of cookie
-        :param domain: (optional) string containing domain of cookie
-        :param path: (optional) string containing path of cookie
-        :return: cookie.value
-        """
-        for cookie in iter(self):
-            if cookie.name == name:
-                if domain is None or cookie.domain == domain:
-                    if path is None or cookie.path == path:
-                        return cookie.value
-
-        raise KeyError('name=%r, domain=%r, path=%r' % (name, domain, path))
-
-    def _find_no_duplicates(self, name, domain=None, path=None):
-        """Both ``__get_item__`` and ``get`` call this function: it's never
-        used elsewhere in Requests.
-
-        :param name: a string containing name of cookie
-        :param domain: (optional) string containing domain of cookie
-        :param path: (optional) string containing path of cookie
-        :raises KeyError: if cookie is not found
-        :raises CookieConflictError: if there are multiple cookies
-            that match name and optionally domain and path
-        :return: cookie.value
-        """
-        toReturn = None
-        for cookie in iter(self):
-            if cookie.name == name:
-                if domain is None or cookie.domain == domain:
-                    if path is None or cookie.path == path:
-                        if toReturn is not None:  # if there are multiple cookies that meet passed in criteria
-                            raise CookieConflictError('There are multiple cookies with name, %r' % (name))
-                        toReturn = cookie.value  # we will eventually return this as long as no cookie conflict
-
-        if toReturn:
-            return toReturn
-        raise KeyError('name=%r, domain=%r, path=%r' % (name, domain, path))
-
-    def __getstate__(self):
-        """Unlike a normal CookieJar, this class is pickleable."""
-        state = self.__dict__.copy()
-        # remove the unpickleable RLock object
-        state.pop('_cookies_lock')
-        return state
-
-    def __setstate__(self, state):
-        """Unlike a normal CookieJar, this class is pickleable."""
-        self.__dict__.update(state)
-        if '_cookies_lock' not in self.__dict__:
-            self._cookies_lock = threading.RLock()
-
-    def copy(self):
-        """Return a copy of this RequestsCookieJar."""
-        new_cj = RequestsCookieJar()
-        new_cj.set_policy(self.get_policy())
-        new_cj.update(self)
-        return new_cj
-
-    def get_policy(self):
-        """Return the CookiePolicy instance used."""
-        return self._policy
-
-
-def _copy_cookie_jar(jar):
-    if jar is None:
-        return None
-
-    if hasattr(jar, 'copy'):
-        # We're dealing with an instance of RequestsCookieJar
-        return jar.copy()
-    # We're dealing with a generic CookieJar instance
-    new_jar = copy.copy(jar)
-    new_jar.clear()
-    for cookie in jar:
-        new_jar.set_cookie(copy.copy(cookie))
-    return new_jar
-
-
-def create_cookie(name, value, **kwargs):
-    """Make a cookie from underspecified parameters.
-
-    By default, the pair of `name` and `value` will be set for the domain ''
-    and sent on every request (this is sometimes called a "supercookie").
-    """
-    result = {
-        'version': 0,
-        'name': name,
-        'value': value,
-        'port': None,
-        'domain': '',
-        'path': '/',
-        'secure': False,
-        'expires': None,
-        'discard': True,
-        'comment': None,
-        'comment_url': None,
-        'rest': {'HttpOnly': None},
-        'rfc2109': False,
-    }
-
-    badargs = set(kwargs) - set(result)
-    if badargs:
-        err = 'create_cookie() got unexpected keyword arguments: %s'
-        raise TypeError(err % list(badargs))
-
-    result.update(kwargs)
-    result['port_specified'] = bool(result['port'])
-    result['domain_specified'] = bool(result['domain'])
-    result['domain_initial_dot'] = result['domain'].startswith('.')
-    result['path_specified'] = bool(result['path'])
-
-    return cookielib.Cookie(**result)
-
-
-def morsel_to_cookie(morsel):
-    """Convert a Morsel object into a Cookie containing the one k/v pair."""
-
-    expires = None
-    if morsel['max-age']:
-        try:
-            expires = int(time.time() + int(morsel['max-age']))
-        except ValueError:
-            raise TypeError('max-age: %s must be integer' % morsel['max-age'])
-    elif morsel['expires']:
-        time_template = '%a, %d-%b-%Y %H:%M:%S GMT'
-        expires = calendar.timegm(
-            time.strptime(morsel['expires'], time_template)
-        )
-    return create_cookie(
-        comment=morsel['comment'],
-        comment_url=bool(morsel['comment']),
-        discard=False,
-        domain=morsel['domain'],
-        expires=expires,
-        name=morsel.key,
-        path=morsel['path'],
-        port=None,
-        rest={'HttpOnly': morsel['httponly']},
-        rfc2109=False,
-        secure=bool(morsel['secure']),
-        value=morsel.value,
-        version=morsel['version'] or 0,
-    )
-
-
-def cookiejar_from_dict(cookie_dict, cookiejar=None, overwrite=True):
-    """Returns a CookieJar from a key/value dictionary.
-
-    :param cookie_dict: Dict of key/values to insert into CookieJar.
-    :param cookiejar: (optional) A cookiejar to add the cookies to.
-    :param overwrite: (optional) If False, will not replace cookies
-        already in the jar with new ones.
-    :rtype: CookieJar
-    """
-    if cookiejar is None:
-        cookiejar = RequestsCookieJar()
-
-    if cookie_dict is not None:
-        names_from_jar = [cookie.name for cookie in cookiejar]
-        for name in cookie_dict:
-            if overwrite or (name not in names_from_jar):
-                cookiejar.set_cookie(create_cookie(name, cookie_dict[name]))
-
-    return cookiejar
-
-
-def merge_cookies(cookiejar, cookies):
-    """Add cookies to cookiejar and returns a merged CookieJar.
-
-    :param cookiejar: CookieJar object to add the cookies to.
-    :param cookies: Dictionary or CookieJar object to be added.
-    :rtype: CookieJar
-    """
-    if not isinstance(cookiejar, cookielib.CookieJar):
-        raise ValueError('You can only merge into CookieJar')
-
-    if isinstance(cookies, dict):
-        cookiejar = cookiejar_from_dict(
-            cookies, cookiejar=cookiejar, overwrite=False)
-    elif isinstance(cookies, cookielib.CookieJar):
-        try:
-            cookiejar.update(cookies)
-        except AttributeError:
-            for cookie_in_jar in cookies:
-                cookiejar.set_cookie(cookie_in_jar)
-
-    return cookiejar
diff --git a/venv/lib/python3.7/site-packages/requests/exceptions.py b/venv/lib/python3.7/site-packages/requests/exceptions.py
deleted file mode 100644
index a80cad8..0000000
--- a/venv/lib/python3.7/site-packages/requests/exceptions.py
+++ /dev/null
@@ -1,126 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-requests.exceptions
-~~~~~~~~~~~~~~~~~~~
-
-This module contains the set of Requests' exceptions.
-"""
-from urllib3.exceptions import HTTPError as BaseHTTPError
-
-
-class RequestException(IOError):
-    """There was an ambiguous exception that occurred while handling your
-    request.
-    """
-
-    def __init__(self, *args, **kwargs):
-        """Initialize RequestException with `request` and `response` objects."""
-        response = kwargs.pop('response', None)
-        self.response = response
-        self.request = kwargs.pop('request', None)
-        if (response is not None and not self.request and
-                hasattr(response, 'request')):
-            self.request = self.response.request
-        super(RequestException, self).__init__(*args, **kwargs)
-
-
-class HTTPError(RequestException):
-    """An HTTP error occurred."""
-
-
-class ConnectionError(RequestException):
-    """A Connection error occurred."""
-
-
-class ProxyError(ConnectionError):
-    """A proxy error occurred."""
-
-
-class SSLError(ConnectionError):
-    """An SSL error occurred."""
-
-
-class Timeout(RequestException):
-    """The request timed out.
-
-    Catching this error will catch both
-    :exc:`~requests.exceptions.ConnectTimeout` and
-    :exc:`~requests.exceptions.ReadTimeout` errors.
-    """
-
-
-class ConnectTimeout(ConnectionError, Timeout):
-    """The request timed out while trying to connect to the remote server.
-
-    Requests that produced this error are safe to retry.
-    """
-
-
-class ReadTimeout(Timeout):
-    """The server did not send any data in the allotted amount of time."""
-
-
-class URLRequired(RequestException):
-    """A valid URL is required to make a request."""
-
-
-class TooManyRedirects(RequestException):
-    """Too many redirects."""
-
-
-class MissingSchema(RequestException, ValueError):
-    """The URL schema (e.g. http or https) is missing."""
-
-
-class InvalidSchema(RequestException, ValueError):
-    """See defaults.py for valid schemas."""
-
-
-class InvalidURL(RequestException, ValueError):
-    """The URL provided was somehow invalid."""
-
-
-class InvalidHeader(RequestException, ValueError):
-    """The header value provided was somehow invalid."""
-
-
-class InvalidProxyURL(InvalidURL):
-    """The proxy URL provided is invalid."""
-
-
-class ChunkedEncodingError(RequestException):
-    """The server declared chunked encoding but sent an invalid chunk."""
-
-
-class ContentDecodingError(RequestException, BaseHTTPError):
-    """Failed to decode response content"""
-
-
-class StreamConsumedError(RequestException, TypeError):
-    """The content for this response was already consumed"""
-
-
-class RetryError(RequestException):
-    """Custom retries logic failed"""
-
-
-class UnrewindableBodyError(RequestException):
-    """Requests encountered an error when trying to rewind a body"""
-
-# Warnings
-
-
-class RequestsWarning(Warning):
-    """Base warning for Requests."""
-    pass
-
-
-class FileModeWarning(RequestsWarning, DeprecationWarning):
-    """A file was opened in text mode, but Requests determined its binary length."""
-    pass
-
-
-class RequestsDependencyWarning(RequestsWarning):
-    """An imported dependency doesn't match the expected version range."""
-    pass
diff --git a/venv/lib/python3.7/site-packages/requests/help.py b/venv/lib/python3.7/site-packages/requests/help.py
deleted file mode 100644
index e53d35e..0000000
--- a/venv/lib/python3.7/site-packages/requests/help.py
+++ /dev/null
@@ -1,119 +0,0 @@
-"""Module containing bug report helper(s)."""
-from __future__ import print_function
-
-import json
-import platform
-import sys
-import ssl
-
-import idna
-import urllib3
-import chardet
-
-from . import __version__ as requests_version
-
-try:
-    from urllib3.contrib import pyopenssl
-except ImportError:
-    pyopenssl = None
-    OpenSSL = None
-    cryptography = None
-else:
-    import OpenSSL
-    import cryptography
-
-
-def _implementation():
-    """Return a dict with the Python implementation and version.
-
-    Provide both the name and the version of the Python implementation
-    currently running. For example, on CPython 2.7.5 it will return
-    {'name': 'CPython', 'version': '2.7.5'}.
-
-    This function works best on CPython and PyPy: in particular, it probably
-    doesn't work for Jython or IronPython. Future investigation should be done
-    to work out the correct shape of the code for those platforms.
-    """
-    implementation = platform.python_implementation()
-
-    if implementation == 'CPython':
-        implementation_version = platform.python_version()
-    elif implementation == 'PyPy':
-        implementation_version = '%s.%s.%s' % (sys.pypy_version_info.major,
-                                               sys.pypy_version_info.minor,
-                                               sys.pypy_version_info.micro)
-        if sys.pypy_version_info.releaselevel != 'final':
-            implementation_version = ''.join([
-                implementation_version, sys.pypy_version_info.releaselevel
-            ])
-    elif implementation == 'Jython':
-        implementation_version = platform.python_version()  # Complete Guess
-    elif implementation == 'IronPython':
-        implementation_version = platform.python_version()  # Complete Guess
-    else:
-        implementation_version = 'Unknown'
-
-    return {'name': implementation, 'version': implementation_version}
-
-
-def info():
-    """Generate information for a bug report."""
-    try:
-        platform_info = {
-            'system': platform.system(),
-            'release': platform.release(),
-        }
-    except IOError:
-        platform_info = {
-            'system': 'Unknown',
-            'release': 'Unknown',
-        }
-
-    implementation_info = _implementation()
-    urllib3_info = {'version': urllib3.__version__}
-    chardet_info = {'version': chardet.__version__}
-
-    pyopenssl_info = {
-        'version': None,
-        'openssl_version': '',
-    }
-    if OpenSSL:
-        pyopenssl_info = {
-            'version': OpenSSL.__version__,
-            'openssl_version': '%x' % OpenSSL.SSL.OPENSSL_VERSION_NUMBER,
-        }
-    cryptography_info = {
-        'version': getattr(cryptography, '__version__', ''),
-    }
-    idna_info = {
-        'version': getattr(idna, '__version__', ''),
-    }
-
-    system_ssl = ssl.OPENSSL_VERSION_NUMBER
-    system_ssl_info = {
-        'version': '%x' % system_ssl if system_ssl is not None else ''
-    }
-
-    return {
-        'platform': platform_info,
-        'implementation': implementation_info,
-        'system_ssl': system_ssl_info,
-        'using_pyopenssl': pyopenssl is not None,
-        'pyOpenSSL': pyopenssl_info,
-        'urllib3': urllib3_info,
-        'chardet': chardet_info,
-        'cryptography': cryptography_info,
-        'idna': idna_info,
-        'requests': {
-            'version': requests_version,
-        },
-    }
-
-
-def main():
-    """Pretty-print the bug information as JSON."""
-    print(json.dumps(info(), sort_keys=True, indent=2))
-
-
-if __name__ == '__main__':
-    main()
diff --git a/venv/lib/python3.7/site-packages/requests/hooks.py b/venv/lib/python3.7/site-packages/requests/hooks.py
deleted file mode 100644
index 7a51f21..0000000
--- a/venv/lib/python3.7/site-packages/requests/hooks.py
+++ /dev/null
@@ -1,34 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-requests.hooks
-~~~~~~~~~~~~~~
-
-This module provides the capabilities for the Requests hooks system.
-
-Available hooks:
-
-``response``:
-    The response generated from a Request.
-"""
-HOOKS = ['response']
-
-
-def default_hooks():
-    return {event: [] for event in HOOKS}
-
-# TODO: response is the only one
-
-
-def dispatch_hook(key, hooks, hook_data, **kwargs):
-    """Dispatches a hook dictionary on a given piece of data."""
-    hooks = hooks or {}
-    hooks = hooks.get(key)
-    if hooks:
-        if hasattr(hooks, '__call__'):
-            hooks = [hooks]
-        for hook in hooks:
-            _hook_data = hook(hook_data, **kwargs)
-            if _hook_data is not None:
-                hook_data = _hook_data
-    return hook_data
diff --git a/venv/lib/python3.7/site-packages/requests/models.py b/venv/lib/python3.7/site-packages/requests/models.py
deleted file mode 100644
index 62dcd0b..0000000
--- a/venv/lib/python3.7/site-packages/requests/models.py
+++ /dev/null
@@ -1,953 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-requests.models
-~~~~~~~~~~~~~~~
-
-This module contains the primary objects that power Requests.
-"""
-
-import datetime
-import sys
-
-# Import encoding now, to avoid implicit import later.
-# Implicit import within threads may cause LookupError when standard library is in a ZIP,
-# such as in Embedded Python. See https://github.com/requests/requests/issues/3578.
-import encodings.idna
-
-from urllib3.fields import RequestField
-from urllib3.filepost import encode_multipart_formdata
-from urllib3.util import parse_url
-from urllib3.exceptions import (
-    DecodeError, ReadTimeoutError, ProtocolError, LocationParseError)
-
-from io import UnsupportedOperation
-from .hooks import default_hooks
-from .structures import CaseInsensitiveDict
-
-from .auth import HTTPBasicAuth
-from .cookies import cookiejar_from_dict, get_cookie_header, _copy_cookie_jar
-from .exceptions import (
-    HTTPError, MissingSchema, InvalidURL, ChunkedEncodingError,
-    ContentDecodingError, ConnectionError, StreamConsumedError)
-from ._internal_utils import to_native_string, unicode_is_ascii
-from .utils import (
-    guess_filename, get_auth_from_url, requote_uri,
-    stream_decode_response_unicode, to_key_val_list, parse_header_links,
-    iter_slices, guess_json_utf, super_len, check_header_validity)
-from .compat import (
-    Callable, Mapping,
-    cookielib, urlunparse, urlsplit, urlencode, str, bytes,
-    is_py2, chardet, builtin_str, basestring)
-from .compat import json as complexjson
-from .status_codes import codes
-
-#: The set of HTTP status codes that indicate an automatically
-#: processable redirect.
-REDIRECT_STATI = (
-    codes.moved,               # 301
-    codes.found,               # 302
-    codes.other,               # 303
-    codes.temporary_redirect,  # 307
-    codes.permanent_redirect,  # 308
-)
-
-DEFAULT_REDIRECT_LIMIT = 30
-CONTENT_CHUNK_SIZE = 10 * 1024
-ITER_CHUNK_SIZE = 512
-
-
-class RequestEncodingMixin(object):
-    @property
-    def path_url(self):
-        """Build the path URL to use."""
-
-        url = []
-
-        p = urlsplit(self.url)
-
-        path = p.path
-        if not path:
-            path = '/'
-
-        url.append(path)
-
-        query = p.query
-        if query:
-            url.append('?')
-            url.append(query)
-
-        return ''.join(url)
-
-    @staticmethod
-    def _encode_params(data):
-        """Encode parameters in a piece of data.
-
-        Will successfully encode parameters when passed as a dict or a list of
-        2-tuples. Order is retained if data is a list of 2-tuples but arbitrary
-        if parameters are supplied as a dict.
-        """
-
-        if isinstance(data, (str, bytes)):
-            return data
-        elif hasattr(data, 'read'):
-            return data
-        elif hasattr(data, '__iter__'):
-            result = []
-            for k, vs in to_key_val_list(data):
-                if isinstance(vs, basestring) or not hasattr(vs, '__iter__'):
-                    vs = [vs]
-                for v in vs:
-                    if v is not None:
-                        result.append(
-                            (k.encode('utf-8') if isinstance(k, str) else k,
-                             v.encode('utf-8') if isinstance(v, str) else v))
-            return urlencode(result, doseq=True)
-        else:
-            return data
-
-    @staticmethod
-    def _encode_files(files, data):
-        """Build the body for a multipart/form-data request.
-
-        Will successfully encode files when passed as a dict or a list of
-        tuples. Order is retained if data is a list of tuples but arbitrary
-        if parameters are supplied as a dict.
-        The tuples may be 2-tuples (filename, fileobj), 3-tuples (filename, fileobj, contentype)
-        or 4-tuples (filename, fileobj, contentype, custom_headers).
-        """
-        if (not files):
-            raise ValueError("Files must be provided.")
-        elif isinstance(data, basestring):
-            raise ValueError("Data must not be a string.")
-
-        new_fields = []
-        fields = to_key_val_list(data or {})
-        files = to_key_val_list(files or {})
-
-        for field, val in fields:
-            if isinstance(val, basestring) or not hasattr(val, '__iter__'):
-                val = [val]
-            for v in val:
-                if v is not None:
-                    # Don't call str() on bytestrings: in Py3 it all goes wrong.
-                    if not isinstance(v, bytes):
-                        v = str(v)
-
-                    new_fields.append(
-                        (field.decode('utf-8') if isinstance(field, bytes) else field,
-                         v.encode('utf-8') if isinstance(v, str) else v))
-
-        for (k, v) in files:
-            # support for explicit filename
-            ft = None
-            fh = None
-            if isinstance(v, (tuple, list)):
-                if len(v) == 2:
-                    fn, fp = v
-                elif len(v) == 3:
-                    fn, fp, ft = v
-                else:
-                    fn, fp, ft, fh = v
-            else:
-                fn = guess_filename(v) or k
-                fp = v
-
-            if isinstance(fp, (str, bytes, bytearray)):
-                fdata = fp
-            elif hasattr(fp, 'read'):
-                fdata = fp.read()
-            elif fp is None:
-                continue
-            else:
-                fdata = fp
-
-            rf = RequestField(name=k, data=fdata, filename=fn, headers=fh)
-            rf.make_multipart(content_type=ft)
-            new_fields.append(rf)
-
-        body, content_type = encode_multipart_formdata(new_fields)
-
-        return body, content_type
-
-
-class RequestHooksMixin(object):
-    def register_hook(self, event, hook):
-        """Properly register a hook."""
-
-        if event not in self.hooks:
-            raise ValueError('Unsupported event specified, with event name "%s"' % (event))
-
-        if isinstance(hook, Callable):
-            self.hooks[event].append(hook)
-        elif hasattr(hook, '__iter__'):
-            self.hooks[event].extend(h for h in hook if isinstance(h, Callable))
-
-    def deregister_hook(self, event, hook):
-        """Deregister a previously registered hook.
-        Returns True if the hook existed, False if not.
-        """
-
-        try:
-            self.hooks[event].remove(hook)
-            return True
-        except ValueError:
-            return False
-
-
-class Request(RequestHooksMixin):
-    """A user-created :class:`Request <Request>` object.
-
-    Used to prepare a :class:`PreparedRequest <PreparedRequest>`, which is sent to the server.
-
-    :param method: HTTP method to use.
-    :param url: URL to send.
-    :param headers: dictionary of headers to send.
-    :param files: dictionary of {filename: fileobject} files to multipart upload.
-    :param data: the body to attach to the request. If a dictionary or
-        list of tuples ``[(key, value)]`` is provided, form-encoding will
-        take place.
-    :param json: json for the body to attach to the request (if files or data is not specified).
-    :param params: URL parameters to append to the URL. If a dictionary or
-        list of tuples ``[(key, value)]`` is provided, form-encoding will
-        take place.
-    :param auth: Auth handler or (user, pass) tuple.
-    :param cookies: dictionary or CookieJar of cookies to attach to this request.
-    :param hooks: dictionary of callback hooks, for internal usage.
-
-    Usage::
-
-      >>> import requests
-      >>> req = requests.Request('GET', 'https://httpbin.org/get')
-      >>> req.prepare()
-      <PreparedRequest [GET]>
-    """
-
-    def __init__(self,
-            method=None, url=None, headers=None, files=None, data=None,
-            params=None, auth=None, cookies=None, hooks=None, json=None):
-
-        # Default empty dicts for dict params.
-        data = [] if data is None else data
-        files = [] if files is None else files
-        headers = {} if headers is None else headers
-        params = {} if params is None else params
-        hooks = {} if hooks is None else hooks
-
-        self.hooks = default_hooks()
-        for (k, v) in list(hooks.items()):
-            self.register_hook(event=k, hook=v)
-
-        self.method = method
-        self.url = url
-        self.headers = headers
-        self.files = files
-        self.data = data
-        self.json = json
-        self.params = params
-        self.auth = auth
-        self.cookies = cookies
-
-    def __repr__(self):
-        return '<Request [%s]>' % (self.method)
-
-    def prepare(self):
-        """Constructs a :class:`PreparedRequest <PreparedRequest>` for transmission and returns it."""
-        p = PreparedRequest()
-        p.prepare(
-            method=self.method,
-            url=self.url,
-            headers=self.headers,
-            files=self.files,
-            data=self.data,
-            json=self.json,
-            params=self.params,
-            auth=self.auth,
-            cookies=self.cookies,
-            hooks=self.hooks,
-        )
-        return p
-
-
-class PreparedRequest(RequestEncodingMixin, RequestHooksMixin):
-    """The fully mutable :class:`PreparedRequest <PreparedRequest>` object,
-    containing the exact bytes that will be sent to the server.
-
-    Generated from either a :class:`Request <Request>` object or manually.
-
-    Usage::
-
-      >>> import requests
-      >>> req = requests.Request('GET', 'https://httpbin.org/get')
-      >>> r = req.prepare()
-      <PreparedRequest [GET]>
-
-      >>> s = requests.Session()
-      >>> s.send(r)
-      <Response [200]>
-    """
-
-    def __init__(self):
-        #: HTTP verb to send to the server.
-        self.method = None
-        #: HTTP URL to send the request to.
-        self.url = None
-        #: dictionary of HTTP headers.
-        self.headers = None
-        # The `CookieJar` used to create the Cookie header will be stored here
-        # after prepare_cookies is called
-        self._cookies = None
-        #: request body to send to the server.
-        self.body = None
-        #: dictionary of callback hooks, for internal usage.
-        self.hooks = default_hooks()
-        #: integer denoting starting position of a readable file-like body.
-        self._body_position = None
-
-    def prepare(self,
-            method=None, url=None, headers=None, files=None, data=None,
-            params=None, auth=None, cookies=None, hooks=None, json=None):
-        """Prepares the entire request with the given parameters."""
-
-        self.prepare_method(method)
-        self.prepare_url(url, params)
-        self.prepare_headers(headers)
-        self.prepare_cookies(cookies)
-        self.prepare_body(data, files, json)
-        self.prepare_auth(auth, url)
-
-        # Note that prepare_auth must be last to enable authentication schemes
-        # such as OAuth to work on a fully prepared request.
-
-        # This MUST go after prepare_auth. Authenticators could add a hook
-        self.prepare_hooks(hooks)
-
-    def __repr__(self):
-        return '<PreparedRequest [%s]>' % (self.method)
-
-    def copy(self):
-        p = PreparedRequest()
-        p.method = self.method
-        p.url = self.url
-        p.headers = self.headers.copy() if self.headers is not None else None
-        p._cookies = _copy_cookie_jar(self._cookies)
-        p.body = self.body
-        p.hooks = self.hooks
-        p._body_position = self._body_position
-        return p
-
-    def prepare_method(self, method):
-        """Prepares the given HTTP method."""
-        self.method = method
-        if self.method is not None:
-            self.method = to_native_string(self.method.upper())
-
-    @staticmethod
-    def _get_idna_encoded_host(host):
-        import idna
-
-        try:
-            host = idna.encode(host, uts46=True).decode('utf-8')
-        except idna.IDNAError:
-            raise UnicodeError
-        return host
-
-    def prepare_url(self, url, params):
-        """Prepares the given HTTP URL."""
-        #: Accept objects that have string representations.
-        #: We're unable to blindly call unicode/str functions
-        #: as this will include the bytestring indicator (b'')
-        #: on python 3.x.
-        #: https://github.com/requests/requests/pull/2238
-        if isinstance(url, bytes):
-            url = url.decode('utf8')
-        else:
-            url = unicode(url) if is_py2 else str(url)
-
-        # Remove leading whitespaces from url
-        url = url.lstrip()
-
-        # Don't do any URL preparation for non-HTTP schemes like `mailto`,
-        # `data` etc to work around exceptions from `url_parse`, which
-        # handles RFC 3986 only.
-        if ':' in url and not url.lower().startswith('http'):
-            self.url = url
-            return
-
-        # Support for unicode domain names and paths.
-        try:
-            scheme, auth, host, port, path, query, fragment = parse_url(url)
-        except LocationParseError as e:
-            raise InvalidURL(*e.args)
-
-        if not scheme:
-            error = ("Invalid URL {0!r}: No schema supplied. Perhaps you meant http://{0}?")
-            error = error.format(to_native_string(url, 'utf8'))
-
-            raise MissingSchema(error)
-
-        if not host:
-            raise InvalidURL("Invalid URL %r: No host supplied" % url)
-
-        # In general, we want to try IDNA encoding the hostname if the string contains
-        # non-ASCII characters. This allows users to automatically get the correct IDNA
-        # behaviour. For strings containing only ASCII characters, we need to also verify
-        # it doesn't start with a wildcard (*), before allowing the unencoded hostname.
-        if not unicode_is_ascii(host):
-            try:
-                host = self._get_idna_encoded_host(host)
-            except UnicodeError:
-                raise InvalidURL('URL has an invalid label.')
-        elif host.startswith(u'*'):
-            raise InvalidURL('URL has an invalid label.')
-
-        # Carefully reconstruct the network location
-        netloc = auth or ''
-        if netloc:
-            netloc += '@'
-        netloc += host
-        if port:
-            netloc += ':' + str(port)
-
-        # Bare domains aren't valid URLs.
-        if not path:
-            path = '/'
-
-        if is_py2:
-            if isinstance(scheme, str):
-                scheme = scheme.encode('utf-8')
-            if isinstance(netloc, str):
-                netloc = netloc.encode('utf-8')
-            if isinstance(path, str):
-                path = path.encode('utf-8')
-            if isinstance(query, str):
-                query = query.encode('utf-8')
-            if isinstance(fragment, str):
-                fragment = fragment.encode('utf-8')
-
-        if isinstance(params, (str, bytes)):
-            params = to_native_string(params)
-
-        enc_params = self._encode_params(params)
-        if enc_params:
-            if query:
-                query = '%s&%s' % (query, enc_params)
-            else:
-                query = enc_params
-
-        url = requote_uri(urlunparse([scheme, netloc, path, None, query, fragment]))
-        self.url = url
-
-    def prepare_headers(self, headers):
-        """Prepares the given HTTP headers."""
-
-        self.headers = CaseInsensitiveDict()
-        if headers:
-            for header in headers.items():
-                # Raise exception on invalid header value.
-                check_header_validity(header)
-                name, value = header
-                self.headers[to_native_string(name)] = value
-
-    def prepare_body(self, data, files, json=None):
-        """Prepares the given HTTP body data."""
-
-        # Check if file, fo, generator, iterator.
-        # If not, run through normal process.
-
-        # Nottin' on you.
-        body = None
-        content_type = None
-
-        if not data and json is not None:
-            # urllib3 requires a bytes-like body. Python 2's json.dumps
-            # provides this natively, but Python 3 gives a Unicode string.
-            content_type = 'application/json'
-            body = complexjson.dumps(json)
-            if not isinstance(body, bytes):
-                body = body.encode('utf-8')
-
-        is_stream = all([
-            hasattr(data, '__iter__'),
-            not isinstance(data, (basestring, list, tuple, Mapping))
-        ])
-
-        try:
-            length = super_len(data)
-        except (TypeError, AttributeError, UnsupportedOperation):
-            length = None
-
-        if is_stream:
-            body = data
-
-            if getattr(body, 'tell', None) is not None:
-                # Record the current file position before reading.
-                # This will allow us to rewind a file in the event
-                # of a redirect.
-                try:
-                    self._body_position = body.tell()
-                except (IOError, OSError):
-                    # This differentiates from None, allowing us to catch
-                    # a failed `tell()` later when trying to rewind the body
-                    self._body_position = object()
-
-            if files:
-                raise NotImplementedError('Streamed bodies and files are mutually exclusive.')
-
-            if length:
-                self.headers['Content-Length'] = builtin_str(length)
-            else:
-                self.headers['Transfer-Encoding'] = 'chunked'
-        else:
-            # Multi-part file uploads.
-            if files:
-                (body, content_type) = self._encode_files(files, data)
-            else:
-                if data:
-                    body = self._encode_params(data)
-                    if isinstance(data, basestring) or hasattr(data, 'read'):
-                        content_type = None
-                    else:
-                        content_type = 'application/x-www-form-urlencoded'
-
-            self.prepare_content_length(body)
-
-            # Add content-type if it wasn't explicitly provided.
-            if content_type and ('content-type' not in self.headers):
-                self.headers['Content-Type'] = content_type
-
-        self.body = body
-
-    def prepare_content_length(self, body):
-        """Prepare Content-Length header based on request method and body"""
-        if body is not None:
-            length = super_len(body)
-            if length:
-                # If length exists, set it. Otherwise, we fallback
-                # to Transfer-Encoding: chunked.
-                self.headers['Content-Length'] = builtin_str(length)
-        elif self.method not in ('GET', 'HEAD') and self.headers.get('Content-Length') is None:
-            # Set Content-Length to 0 for methods that can have a body
-            # but don't provide one. (i.e. not GET or HEAD)
-            self.headers['Content-Length'] = '0'
-
-    def prepare_auth(self, auth, url=''):
-        """Prepares the given HTTP auth data."""
-
-        # If no Auth is explicitly provided, extract it from the URL first.
-        if auth is None:
-            url_auth = get_auth_from_url(self.url)
-            auth = url_auth if any(url_auth) else None
-
-        if auth:
-            if isinstance(auth, tuple) and len(auth) == 2:
-                # special-case basic HTTP auth
-                auth = HTTPBasicAuth(*auth)
-
-            # Allow auth to make its changes.
-            r = auth(self)
-
-            # Update self to reflect the auth changes.
-            self.__dict__.update(r.__dict__)
-
-            # Recompute Content-Length
-            self.prepare_content_length(self.body)
-
-    def prepare_cookies(self, cookies):
-        """Prepares the given HTTP cookie data.
-
-        This function eventually generates a ``Cookie`` header from the
-        given cookies using cookielib. Due to cookielib's design, the header
-        will not be regenerated if it already exists, meaning this function
-        can only be called once for the life of the
-        :class:`PreparedRequest <PreparedRequest>` object. Any subsequent calls
-        to ``prepare_cookies`` will have no actual effect, unless the "Cookie"
-        header is removed beforehand.
-        """
-        if isinstance(cookies, cookielib.CookieJar):
-            self._cookies = cookies
-        else:
-            self._cookies = cookiejar_from_dict(cookies)
-
-        cookie_header = get_cookie_header(self._cookies, self)
-        if cookie_header is not None:
-            self.headers['Cookie'] = cookie_header
-
-    def prepare_hooks(self, hooks):
-        """Prepares the given hooks."""
-        # hooks can be passed as None to the prepare method and to this
-        # method. To prevent iterating over None, simply use an empty list
-        # if hooks is False-y
-        hooks = hooks or []
-        for event in hooks:
-            self.register_hook(event, hooks[event])
-
-
-class Response(object):
-    """The :class:`Response <Response>` object, which contains a
-    server's response to an HTTP request.
-    """
-
-    __attrs__ = [
-        '_content', 'status_code', 'headers', 'url', 'history',
-        'encoding', 'reason', 'cookies', 'elapsed', 'request'
-    ]
-
-    def __init__(self):
-        self._content = False
-        self._content_consumed = False
-        self._next = None
-
-        #: Integer Code of responded HTTP Status, e.g. 404 or 200.
-        self.status_code = None
-
-        #: Case-insensitive Dictionary of Response Headers.
-        #: For example, ``headers['content-encoding']`` will return the
-        #: value of a ``'Content-Encoding'`` response header.
-        self.headers = CaseInsensitiveDict()
-
-        #: File-like object representation of response (for advanced usage).
-        #: Use of ``raw`` requires that ``stream=True`` be set on the request.
-        # This requirement does not apply for use internally to Requests.
-        self.raw = None
-
-        #: Final URL location of Response.
-        self.url = None
-
-        #: Encoding to decode with when accessing r.text.
-        self.encoding = None
-
-        #: A list of :class:`Response <Response>` objects from
-        #: the history of the Request. Any redirect responses will end
-        #: up here. The list is sorted from the oldest to the most recent request.
-        self.history = []
-
-        #: Textual reason of responded HTTP Status, e.g. "Not Found" or "OK".
-        self.reason = None
-
-        #: A CookieJar of Cookies the server sent back.
-        self.cookies = cookiejar_from_dict({})
-
-        #: The amount of time elapsed between sending the request
-        #: and the arrival of the response (as a timedelta).
-        #: This property specifically measures the time taken between sending
-        #: the first byte of the request and finishing parsing the headers. It
-        #: is therefore unaffected by consuming the response content or the
-        #: value of the ``stream`` keyword argument.
-        self.elapsed = datetime.timedelta(0)
-
-        #: The :class:`PreparedRequest <PreparedRequest>` object to which this
-        #: is a response.
-        self.request = None
-
-    def __enter__(self):
-        return self
-
-    def __exit__(self, *args):
-        self.close()
-
-    def __getstate__(self):
-        # Consume everything; accessing the content attribute makes
-        # sure the content has been fully read.
-        if not self._content_consumed:
-            self.content
-
-        return {attr: getattr(self, attr, None) for attr in self.__attrs__}
-
-    def __setstate__(self, state):
-        for name, value in state.items():
-            setattr(self, name, value)
-
-        # pickled objects do not have .raw
-        setattr(self, '_content_consumed', True)
-        setattr(self, 'raw', None)
-
-    def __repr__(self):
-        return '<Response [%s]>' % (self.status_code)
-
-    def __bool__(self):
-        """Returns True if :attr:`status_code` is less than 400.
-
-        This attribute checks if the status code of the response is between
-        400 and 600 to see if there was a client error or a server error. If
-        the status code, is between 200 and 400, this will return True. This
-        is **not** a check to see if the response code is ``200 OK``.
-        """
-        return self.ok
-
-    def __nonzero__(self):
-        """Returns True if :attr:`status_code` is less than 400.
-
-        This attribute checks if the status code of the response is between
-        400 and 600 to see if there was a client error or a server error. If
-        the status code, is between 200 and 400, this will return True. This
-        is **not** a check to see if the response code is ``200 OK``.
-        """
-        return self.ok
-
-    def __iter__(self):
-        """Allows you to use a response as an iterator."""
-        return self.iter_content(128)
-
-    @property
-    def ok(self):
-        """Returns True if :attr:`status_code` is less than 400, False if not.
-
-        This attribute checks if the status code of the response is between
-        400 and 600 to see if there was a client error or a server error. If
-        the status code is between 200 and 400, this will return True. This
-        is **not** a check to see if the response code is ``200 OK``.
-        """
-        try:
-            self.raise_for_status()
-        except HTTPError:
-            return False
-        return True
-
-    @property
-    def is_redirect(self):
-        """True if this Response is a well-formed HTTP redirect that could have
-        been processed automatically (by :meth:`Session.resolve_redirects`).
-        """
-        return ('location' in self.headers and self.status_code in REDIRECT_STATI)
-
-    @property
-    def is_permanent_redirect(self):
-        """True if this Response one of the permanent versions of redirect."""
-        return ('location' in self.headers and self.status_code in (codes.moved_permanently, codes.permanent_redirect))
-
-    @property
-    def next(self):
-        """Returns a PreparedRequest for the next request in a redirect chain, if there is one."""
-        return self._next
-
-    @property
-    def apparent_encoding(self):
-        """The apparent encoding, provided by the chardet library."""
-        return chardet.detect(self.content)['encoding']
-
-    def iter_content(self, chunk_size=1, decode_unicode=False):
-        """Iterates over the response data.  When stream=True is set on the
-        request, this avoids reading the content at once into memory for
-        large responses.  The chunk size is the number of bytes it should
-        read into memory.  This is not necessarily the length of each item
-        returned as decoding can take place.
-
-        chunk_size must be of type int or None. A value of None will
-        function differently depending on the value of `stream`.
-        stream=True will read data as it arrives in whatever size the
-        chunks are received. If stream=False, data is returned as
-        a single chunk.
-
-        If decode_unicode is True, content will be decoded using the best
-        available encoding based on the response.
-        """
-
-        def generate():
-            # Special case for urllib3.
-            if hasattr(self.raw, 'stream'):
-                try:
-                    for chunk in self.raw.stream(chunk_size, decode_content=True):
-                        yield chunk
-                except ProtocolError as e:
-                    raise ChunkedEncodingError(e)
-                except DecodeError as e:
-                    raise ContentDecodingError(e)
-                except ReadTimeoutError as e:
-                    raise ConnectionError(e)
-            else:
-                # Standard file-like object.
-                while True:
-                    chunk = self.raw.read(chunk_size)
-                    if not chunk:
-                        break
-                    yield chunk
-
-            self._content_consumed = True
-
-        if self._content_consumed and isinstance(self._content, bool):
-            raise StreamConsumedError()
-        elif chunk_size is not None and not isinstance(chunk_size, int):
-            raise TypeError("chunk_size must be an int, it is instead a %s." % type(chunk_size))
-        # simulate reading small chunks of the content
-        reused_chunks = iter_slices(self._content, chunk_size)
-
-        stream_chunks = generate()
-
-        chunks = reused_chunks if self._content_consumed else stream_chunks
-
-        if decode_unicode:
-            chunks = stream_decode_response_unicode(chunks, self)
-
-        return chunks
-
-    def iter_lines(self, chunk_size=ITER_CHUNK_SIZE, decode_unicode=False, delimiter=None):
-        """Iterates over the response data, one line at a time.  When
-        stream=True is set on the request, this avoids reading the
-        content at once into memory for large responses.
-
-        .. note:: This method is not reentrant safe.
-        """
-
-        pending = None
-
-        for chunk in self.iter_content(chunk_size=chunk_size, decode_unicode=decode_unicode):
-
-            if pending is not None:
-                chunk = pending + chunk
-
-            if delimiter:
-                lines = chunk.split(delimiter)
-            else:
-                lines = chunk.splitlines()
-
-            if lines and lines[-1] and chunk and lines[-1][-1] == chunk[-1]:
-                pending = lines.pop()
-            else:
-                pending = None
-
-            for line in lines:
-                yield line
-
-        if pending is not None:
-            yield pending
-
-    @property
-    def content(self):
-        """Content of the response, in bytes."""
-
-        if self._content is False:
-            # Read the contents.
-            if self._content_consumed:
-                raise RuntimeError(
-                    'The content for this response was already consumed')
-
-            if self.status_code == 0 or self.raw is None:
-                self._content = None
-            else:
-                self._content = b''.join(self.iter_content(CONTENT_CHUNK_SIZE)) or b''
-
-        self._content_consumed = True
-        # don't need to release the connection; that's been handled by urllib3
-        # since we exhausted the data.
-        return self._content
-
-    @property
-    def text(self):
-        """Content of the response, in unicode.
-
-        If Response.encoding is None, encoding will be guessed using
-        ``chardet``.
-
-        The encoding of the response content is determined based solely on HTTP
-        headers, following RFC 2616 to the letter. If you can take advantage of
-        non-HTTP knowledge to make a better guess at the encoding, you should
-        set ``r.encoding`` appropriately before accessing this property.
-        """
-
-        # Try charset from content-type
-        content = None
-        encoding = self.encoding
-
-        if not self.content:
-            return str('')
-
-        # Fallback to auto-detected encoding.
-        if self.encoding is None:
-            encoding = self.apparent_encoding
-
-        # Decode unicode from given encoding.
-        try:
-            content = str(self.content, encoding, errors='replace')
-        except (LookupError, TypeError):
-            # A LookupError is raised if the encoding was not found which could
-            # indicate a misspelling or similar mistake.
-            #
-            # A TypeError can be raised if encoding is None
-            #
-            # So we try blindly encoding.
-            content = str(self.content, errors='replace')
-
-        return content
-
-    def json(self, **kwargs):
-        r"""Returns the json-encoded content of a response, if any.
-
-        :param \*\*kwargs: Optional arguments that ``json.loads`` takes.
-        :raises ValueError: If the response body does not contain valid json.
-        """
-
-        if not self.encoding and self.content and len(self.content) > 3:
-            # No encoding set. JSON RFC 4627 section 3 states we should expect
-            # UTF-8, -16 or -32. Detect which one to use; If the detection or
-            # decoding fails, fall back to `self.text` (using chardet to make
-            # a best guess).
-            encoding = guess_json_utf(self.content)
-            if encoding is not None:
-                try:
-                    return complexjson.loads(
-                        self.content.decode(encoding), **kwargs
-                    )
-                except UnicodeDecodeError:
-                    # Wrong UTF codec detected; usually because it's not UTF-8
-                    # but some other 8-bit codec.  This is an RFC violation,
-                    # and the server didn't bother to tell us what codec *was*
-                    # used.
-                    pass
-        return complexjson.loads(self.text, **kwargs)
-
-    @property
-    def links(self):
-        """Returns the parsed header links of the response, if any."""
-
-        header = self.headers.get('link')
-
-        # l = MultiDict()
-        l = {}
-
-        if header:
-            links = parse_header_links(header)
-
-            for link in links:
-                key = link.get('rel') or link.get('url')
-                l[key] = link
-
-        return l
-
-    def raise_for_status(self):
-        """Raises stored :class:`HTTPError`, if one occurred."""
-
-        http_error_msg = ''
-        if isinstance(self.reason, bytes):
-            # We attempt to decode utf-8 first because some servers
-            # choose to localize their reason strings. If the string
-            # isn't utf-8, we fall back to iso-8859-1 for all other
-            # encodings. (See PR #3538)
-            try:
-                reason = self.reason.decode('utf-8')
-            except UnicodeDecodeError:
-                reason = self.reason.decode('iso-8859-1')
-        else:
-            reason = self.reason
-
-        if 400 <= self.status_code < 500:
-            http_error_msg = u'%s Client Error: %s for url: %s' % (self.status_code, reason, self.url)
-
-        elif 500 <= self.status_code < 600:
-            http_error_msg = u'%s Server Error: %s for url: %s' % (self.status_code, reason, self.url)
-
-        if http_error_msg:
-            raise HTTPError(http_error_msg, response=self)
-
-    def close(self):
-        """Releases the connection back to the pool. Once this method has been
-        called the underlying ``raw`` object must not be accessed again.
-
-        *Note: Should not normally need to be called explicitly.*
-        """
-        if not self._content_consumed:
-            self.raw.close()
-
-        release_conn = getattr(self.raw, 'release_conn', None)
-        if release_conn is not None:
-            release_conn()
diff --git a/venv/lib/python3.7/site-packages/requests/packages.py b/venv/lib/python3.7/site-packages/requests/packages.py
deleted file mode 100644
index 7232fe0..0000000
--- a/venv/lib/python3.7/site-packages/requests/packages.py
+++ /dev/null
@@ -1,14 +0,0 @@
-import sys
-
-# This code exists for backwards compatibility reasons.
-# I don't like it either. Just look the other way. :)
-
-for package in ('urllib3', 'idna', 'chardet'):
-    locals()[package] = __import__(package)
-    # This traversal is apparently necessary such that the identities are
-    # preserved (requests.packages.urllib3.* is urllib3.*)
-    for mod in list(sys.modules):
-        if mod == package or mod.startswith(package + '.'):
-            sys.modules['requests.packages.' + mod] = sys.modules[mod]
-
-# Kinda cool, though, right?
diff --git a/venv/lib/python3.7/site-packages/requests/sessions.py b/venv/lib/python3.7/site-packages/requests/sessions.py
deleted file mode 100644
index d73d700..0000000
--- a/venv/lib/python3.7/site-packages/requests/sessions.py
+++ /dev/null
@@ -1,770 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-requests.session
-~~~~~~~~~~~~~~~~
-
-This module provides a Session object to manage and persist settings across
-requests (cookies, auth, proxies).
-"""
-import os
-import sys
-import time
-from datetime import timedelta
-
-from .auth import _basic_auth_str
-from .compat import cookielib, is_py3, OrderedDict, urljoin, urlparse, Mapping
-from .cookies import (
-    cookiejar_from_dict, extract_cookies_to_jar, RequestsCookieJar, merge_cookies)
-from .models import Request, PreparedRequest, DEFAULT_REDIRECT_LIMIT
-from .hooks import default_hooks, dispatch_hook
-from ._internal_utils import to_native_string
-from .utils import to_key_val_list, default_headers, DEFAULT_PORTS
-from .exceptions import (
-    TooManyRedirects, InvalidSchema, ChunkedEncodingError, ContentDecodingError)
-
-from .structures import CaseInsensitiveDict
-from .adapters import HTTPAdapter
-
-from .utils import (
-    requote_uri, get_environ_proxies, get_netrc_auth, should_bypass_proxies,
-    get_auth_from_url, rewind_body
-)
-
-from .status_codes import codes
-
-# formerly defined here, reexposed here for backward compatibility
-from .models import REDIRECT_STATI
-
-# Preferred clock, based on which one is more accurate on a given system.
-if sys.platform == 'win32':
-    try:  # Python 3.4+
-        preferred_clock = time.perf_counter
-    except AttributeError:  # Earlier than Python 3.
-        preferred_clock = time.clock
-else:
-    preferred_clock = time.time
-
-
-def merge_setting(request_setting, session_setting, dict_class=OrderedDict):
-    """Determines appropriate setting for a given request, taking into account
-    the explicit setting on that request, and the setting in the session. If a
-    setting is a dictionary, they will be merged together using `dict_class`
-    """
-
-    if session_setting is None:
-        return request_setting
-
-    if request_setting is None:
-        return session_setting
-
-    # Bypass if not a dictionary (e.g. verify)
-    if not (
-            isinstance(session_setting, Mapping) and
-            isinstance(request_setting, Mapping)
-    ):
-        return request_setting
-
-    merged_setting = dict_class(to_key_val_list(session_setting))
-    merged_setting.update(to_key_val_list(request_setting))
-
-    # Remove keys that are set to None. Extract keys first to avoid altering
-    # the dictionary during iteration.
-    none_keys = [k for (k, v) in merged_setting.items() if v is None]
-    for key in none_keys:
-        del merged_setting[key]
-
-    return merged_setting
-
-
-def merge_hooks(request_hooks, session_hooks, dict_class=OrderedDict):
-    """Properly merges both requests and session hooks.
-
-    This is necessary because when request_hooks == {'response': []}, the
-    merge breaks Session hooks entirely.
-    """
-    if session_hooks is None or session_hooks.get('response') == []:
-        return request_hooks
-
-    if request_hooks is None or request_hooks.get('response') == []:
-        return session_hooks
-
-    return merge_setting(request_hooks, session_hooks, dict_class)
-
-
-class SessionRedirectMixin(object):
-
-    def get_redirect_target(self, resp):
-        """Receives a Response. Returns a redirect URI or ``None``"""
-        # Due to the nature of how requests processes redirects this method will
-        # be called at least once upon the original response and at least twice
-        # on each subsequent redirect response (if any).
-        # If a custom mixin is used to handle this logic, it may be advantageous
-        # to cache the redirect location onto the response object as a private
-        # attribute.
-        if resp.is_redirect:
-            location = resp.headers['location']
-            # Currently the underlying http module on py3 decode headers
-            # in latin1, but empirical evidence suggests that latin1 is very
-            # rarely used with non-ASCII characters in HTTP headers.
-            # It is more likely to get UTF8 header rather than latin1.
-            # This causes incorrect handling of UTF8 encoded location headers.
-            # To solve this, we re-encode the location in latin1.
-            if is_py3:
-                location = location.encode('latin1')
-            return to_native_string(location, 'utf8')
-        return None
-
-    def should_strip_auth(self, old_url, new_url):
-        """Decide whether Authorization header should be removed when redirecting"""
-        old_parsed = urlparse(old_url)
-        new_parsed = urlparse(new_url)
-        if old_parsed.hostname != new_parsed.hostname:
-            return True
-        # Special case: allow http -> https redirect when using the standard
-        # ports. This isn't specified by RFC 7235, but is kept to avoid
-        # breaking backwards compatibility with older versions of requests
-        # that allowed any redirects on the same host.
-        if (old_parsed.scheme == 'http' and old_parsed.port in (80, None)
-                and new_parsed.scheme == 'https' and new_parsed.port in (443, None)):
-            return False
-
-        # Handle default port usage corresponding to scheme.
-        changed_port = old_parsed.port != new_parsed.port
-        changed_scheme = old_parsed.scheme != new_parsed.scheme
-        default_port = (DEFAULT_PORTS.get(old_parsed.scheme, None), None)
-        if (not changed_scheme and old_parsed.port in default_port
-                and new_parsed.port in default_port):
-            return False
-
-        # Standard case: root URI must match
-        return changed_port or changed_scheme
-
-    def resolve_redirects(self, resp, req, stream=False, timeout=None,
-                          verify=True, cert=None, proxies=None, yield_requests=False, **adapter_kwargs):
-        """Receives a Response. Returns a generator of Responses or Requests."""
-
-        hist = []  # keep track of history
-
-        url = self.get_redirect_target(resp)
-        previous_fragment = urlparse(req.url).fragment
-        while url:
-            prepared_request = req.copy()
-
-            # Update history and keep track of redirects.
-            # resp.history must ignore the original request in this loop
-            hist.append(resp)
-            resp.history = hist[1:]
-
-            try:
-                resp.content  # Consume socket so it can be released
-            except (ChunkedEncodingError, ContentDecodingError, RuntimeError):
-                resp.raw.read(decode_content=False)
-
-            if len(resp.history) >= self.max_redirects:
-                raise TooManyRedirects('Exceeded %s redirects.' % self.max_redirects, response=resp)
-
-            # Release the connection back into the pool.
-            resp.close()
-
-            # Handle redirection without scheme (see: RFC 1808 Section 4)
-            if url.startswith('//'):
-                parsed_rurl = urlparse(resp.url)
-                url = '%s:%s' % (to_native_string(parsed_rurl.scheme), url)
-
-            # Normalize url case and attach previous fragment if needed (RFC 7231 7.1.2)
-            parsed = urlparse(url)
-            if parsed.fragment == '' and previous_fragment:
-                parsed = parsed._replace(fragment=previous_fragment)
-            elif parsed.fragment:
-                previous_fragment = parsed.fragment
-            url = parsed.geturl()
-
-            # Facilitate relative 'location' headers, as allowed by RFC 7231.
-            # (e.g. '/path/to/resource' instead of 'http://domain.tld/path/to/resource')
-            # Compliant with RFC3986, we percent encode the url.
-            if not parsed.netloc:
-                url = urljoin(resp.url, requote_uri(url))
-            else:
-                url = requote_uri(url)
-
-            prepared_request.url = to_native_string(url)
-
-            self.rebuild_method(prepared_request, resp)
-
-            # https://github.com/requests/requests/issues/1084
-            if resp.status_code not in (codes.temporary_redirect, codes.permanent_redirect):
-                # https://github.com/requests/requests/issues/3490
-                purged_headers = ('Content-Length', 'Content-Type', 'Transfer-Encoding')
-                for header in purged_headers:
-                    prepared_request.headers.pop(header, None)
-                prepared_request.body = None
-
-            headers = prepared_request.headers
-            try:
-                del headers['Cookie']
-            except KeyError:
-                pass
-
-            # Extract any cookies sent on the response to the cookiejar
-            # in the new request. Because we've mutated our copied prepared
-            # request, use the old one that we haven't yet touched.
-            extract_cookies_to_jar(prepared_request._cookies, req, resp.raw)
-            merge_cookies(prepared_request._cookies, self.cookies)
-            prepared_request.prepare_cookies(prepared_request._cookies)
-
-            # Rebuild auth and proxy information.
-            proxies = self.rebuild_proxies(prepared_request, proxies)
-            self.rebuild_auth(prepared_request, resp)
-
-            # A failed tell() sets `_body_position` to `object()`. This non-None
-            # value ensures `rewindable` will be True, allowing us to raise an
-            # UnrewindableBodyError, instead of hanging the connection.
-            rewindable = (
-                prepared_request._body_position is not None and
-                ('Content-Length' in headers or 'Transfer-Encoding' in headers)
-            )
-
-            # Attempt to rewind consumed file-like object.
-            if rewindable:
-                rewind_body(prepared_request)
-
-            # Override the original request.
-            req = prepared_request
-
-            if yield_requests:
-                yield req
-            else:
-
-                resp = self.send(
-                    req,
-                    stream=stream,
-                    timeout=timeout,
-                    verify=verify,
-                    cert=cert,
-                    proxies=proxies,
-                    allow_redirects=False,
-                    **adapter_kwargs
-                )
-
-                extract_cookies_to_jar(self.cookies, prepared_request, resp.raw)
-
-                # extract redirect url, if any, for the next loop
-                url = self.get_redirect_target(resp)
-                yield resp
-
-    def rebuild_auth(self, prepared_request, response):
-        """When being redirected we may want to strip authentication from the
-        request to avoid leaking credentials. This method intelligently removes
-        and reapplies authentication where possible to avoid credential loss.
-        """
-        headers = prepared_request.headers
-        url = prepared_request.url
-
-        if 'Authorization' in headers and self.should_strip_auth(response.request.url, url):
-            # If we get redirected to a new host, we should strip out any
-            # authentication headers.
-            del headers['Authorization']
-
-        # .netrc might have more auth for us on our new host.
-        new_auth = get_netrc_auth(url) if self.trust_env else None
-        if new_auth is not None:
-            prepared_request.prepare_auth(new_auth)
-
-        return
-
-    def rebuild_proxies(self, prepared_request, proxies):
-        """This method re-evaluates the proxy configuration by considering the
-        environment variables. If we are redirected to a URL covered by
-        NO_PROXY, we strip the proxy configuration. Otherwise, we set missing
-        proxy keys for this URL (in case they were stripped by a previous
-        redirect).
-
-        This method also replaces the Proxy-Authorization header where
-        necessary.
-
-        :rtype: dict
-        """
-        proxies = proxies if proxies is not None else {}
-        headers = prepared_request.headers
-        url = prepared_request.url
-        scheme = urlparse(url).scheme
-        new_proxies = proxies.copy()
-        no_proxy = proxies.get('no_proxy')
-
-        bypass_proxy = should_bypass_proxies(url, no_proxy=no_proxy)
-        if self.trust_env and not bypass_proxy:
-            environ_proxies = get_environ_proxies(url, no_proxy=no_proxy)
-
-            proxy = environ_proxies.get(scheme, environ_proxies.get('all'))
-
-            if proxy:
-                new_proxies.setdefault(scheme, proxy)
-
-        if 'Proxy-Authorization' in headers:
-            del headers['Proxy-Authorization']
-
-        try:
-            username, password = get_auth_from_url(new_proxies[scheme])
-        except KeyError:
-            username, password = None, None
-
-        if username and password:
-            headers['Proxy-Authorization'] = _basic_auth_str(username, password)
-
-        return new_proxies
-
-    def rebuild_method(self, prepared_request, response):
-        """When being redirected we may want to change the method of the request
-        based on certain specs or browser behavior.
-        """
-        method = prepared_request.method
-
-        # https://tools.ietf.org/html/rfc7231#section-6.4.4
-        if response.status_code == codes.see_other and method != 'HEAD':
-            method = 'GET'
-
-        # Do what the browsers do, despite standards...
-        # First, turn 302s into GETs.
-        if response.status_code == codes.found and method != 'HEAD':
-            method = 'GET'
-
-        # Second, if a POST is responded to with a 301, turn it into a GET.
-        # This bizarre behaviour is explained in Issue 1704.
-        if response.status_code == codes.moved and method == 'POST':
-            method = 'GET'
-
-        prepared_request.method = method
-
-
-class Session(SessionRedirectMixin):
-    """A Requests session.
-
-    Provides cookie persistence, connection-pooling, and configuration.
-
-    Basic Usage::
-
-      >>> import requests
-      >>> s = requests.Session()
-      >>> s.get('https://httpbin.org/get')
-      <Response [200]>
-
-    Or as a context manager::
-
-      >>> with requests.Session() as s:
-      >>>     s.get('https://httpbin.org/get')
-      <Response [200]>
-    """
-
-    __attrs__ = [
-        'headers', 'cookies', 'auth', 'proxies', 'hooks', 'params', 'verify',
-        'cert', 'prefetch', 'adapters', 'stream', 'trust_env',
-        'max_redirects',
-    ]
-
-    def __init__(self):
-
-        #: A case-insensitive dictionary of headers to be sent on each
-        #: :class:`Request <Request>` sent from this
-        #: :class:`Session <Session>`.
-        self.headers = default_headers()
-
-        #: Default Authentication tuple or object to attach to
-        #: :class:`Request <Request>`.
-        self.auth = None
-
-        #: Dictionary mapping protocol or protocol and host to the URL of the proxy
-        #: (e.g. {'http': 'foo.bar:3128', 'http://host.name': 'foo.bar:4012'}) to
-        #: be used on each :class:`Request <Request>`.
-        self.proxies = {}
-
-        #: Event-handling hooks.
-        self.hooks = default_hooks()
-
-        #: Dictionary of querystring data to attach to each
-        #: :class:`Request <Request>`. The dictionary values may be lists for
-        #: representing multivalued query parameters.
-        self.params = {}
-
-        #: Stream response content default.
-        self.stream = False
-
-        #: SSL Verification default.
-        self.verify = True
-
-        #: SSL client certificate default, if String, path to ssl client
-        #: cert file (.pem). If Tuple, ('cert', 'key') pair.
-        self.cert = None
-
-        #: Maximum number of redirects allowed. If the request exceeds this
-        #: limit, a :class:`TooManyRedirects` exception is raised.
-        #: This defaults to requests.models.DEFAULT_REDIRECT_LIMIT, which is
-        #: 30.
-        self.max_redirects = DEFAULT_REDIRECT_LIMIT
-
-        #: Trust environment settings for proxy configuration, default
-        #: authentication and similar.
-        self.trust_env = True
-
-        #: A CookieJar containing all currently outstanding cookies set on this
-        #: session. By default it is a
-        #: :class:`RequestsCookieJar <requests.cookies.RequestsCookieJar>`, but
-        #: may be any other ``cookielib.CookieJar`` compatible object.
-        self.cookies = cookiejar_from_dict({})
-
-        # Default connection adapters.
-        self.adapters = OrderedDict()
-        self.mount('https://', HTTPAdapter())
-        self.mount('http://', HTTPAdapter())
-
-    def __enter__(self):
-        return self
-
-    def __exit__(self, *args):
-        self.close()
-
-    def prepare_request(self, request):
-        """Constructs a :class:`PreparedRequest <PreparedRequest>` for
-        transmission and returns it. The :class:`PreparedRequest` has settings
-        merged from the :class:`Request <Request>` instance and those of the
-        :class:`Session`.
-
-        :param request: :class:`Request` instance to prepare with this
-            session's settings.
-        :rtype: requests.PreparedRequest
-        """
-        cookies = request.cookies or {}
-
-        # Bootstrap CookieJar.
-        if not isinstance(cookies, cookielib.CookieJar):
-            cookies = cookiejar_from_dict(cookies)
-
-        # Merge with session cookies
-        merged_cookies = merge_cookies(
-            merge_cookies(RequestsCookieJar(), self.cookies), cookies)
-
-        # Set environment's basic authentication if not explicitly set.
-        auth = request.auth
-        if self.trust_env and not auth and not self.auth:
-            auth = get_netrc_auth(request.url)
-
-        p = PreparedRequest()
-        p.prepare(
-            method=request.method.upper(),
-            url=request.url,
-            files=request.files,
-            data=request.data,
-            json=request.json,
-            headers=merge_setting(request.headers, self.headers, dict_class=CaseInsensitiveDict),
-            params=merge_setting(request.params, self.params),
-            auth=merge_setting(auth, self.auth),
-            cookies=merged_cookies,
-            hooks=merge_hooks(request.hooks, self.hooks),
-        )
-        return p
-
-    def request(self, method, url,
-            params=None, data=None, headers=None, cookies=None, files=None,
-            auth=None, timeout=None, allow_redirects=True, proxies=None,
-            hooks=None, stream=None, verify=None, cert=None, json=None):
-        """Constructs a :class:`Request <Request>`, prepares it and sends it.
-        Returns :class:`Response <Response>` object.
-
-        :param method: method for the new :class:`Request` object.
-        :param url: URL for the new :class:`Request` object.
-        :param params: (optional) Dictionary or bytes to be sent in the query
-            string for the :class:`Request`.
-        :param data: (optional) Dictionary, list of tuples, bytes, or file-like
-            object to send in the body of the :class:`Request`.
-        :param json: (optional) json to send in the body of the
-            :class:`Request`.
-        :param headers: (optional) Dictionary of HTTP Headers to send with the
-            :class:`Request`.
-        :param cookies: (optional) Dict or CookieJar object to send with the
-            :class:`Request`.
-        :param files: (optional) Dictionary of ``'filename': file-like-objects``
-            for multipart encoding upload.
-        :param auth: (optional) Auth tuple or callable to enable
-            Basic/Digest/Custom HTTP Auth.
-        :param timeout: (optional) How long to wait for the server to send
-            data before giving up, as a float, or a :ref:`(connect timeout,
-            read timeout) <timeouts>` tuple.
-        :type timeout: float or tuple
-        :param allow_redirects: (optional) Set to True by default.
-        :type allow_redirects: bool
-        :param proxies: (optional) Dictionary mapping protocol or protocol and
-            hostname to the URL of the proxy.
-        :param stream: (optional) whether to immediately download the response
-            content. Defaults to ``False``.
-        :param verify: (optional) Either a boolean, in which case it controls whether we verify
-            the server's TLS certificate, or a string, in which case it must be a path
-            to a CA bundle to use. Defaults to ``True``.
-        :param cert: (optional) if String, path to ssl client cert file (.pem).
-            If Tuple, ('cert', 'key') pair.
-        :rtype: requests.Response
-        """
-        # Create the Request.
-        req = Request(
-            method=method.upper(),
-            url=url,
-            headers=headers,
-            files=files,
-            data=data or {},
-            json=json,
-            params=params or {},
-            auth=auth,
-            cookies=cookies,
-            hooks=hooks,
-        )
-        prep = self.prepare_request(req)
-
-        proxies = proxies or {}
-
-        settings = self.merge_environment_settings(
-            prep.url, proxies, stream, verify, cert
-        )
-
-        # Send the request.
-        send_kwargs = {
-            'timeout': timeout,
-            'allow_redirects': allow_redirects,
-        }
-        send_kwargs.update(settings)
-        resp = self.send(prep, **send_kwargs)
-
-        return resp
-
-    def get(self, url, **kwargs):
-        r"""Sends a GET request. Returns :class:`Response` object.
-
-        :param url: URL for the new :class:`Request` object.
-        :param \*\*kwargs: Optional arguments that ``request`` takes.
-        :rtype: requests.Response
-        """
-
-        kwargs.setdefault('allow_redirects', True)
-        return self.request('GET', url, **kwargs)
-
-    def options(self, url, **kwargs):
-        r"""Sends a OPTIONS request. Returns :class:`Response` object.
-
-        :param url: URL for the new :class:`Request` object.
-        :param \*\*kwargs: Optional arguments that ``request`` takes.
-        :rtype: requests.Response
-        """
-
-        kwargs.setdefault('allow_redirects', True)
-        return self.request('OPTIONS', url, **kwargs)
-
-    def head(self, url, **kwargs):
-        r"""Sends a HEAD request. Returns :class:`Response` object.
-
-        :param url: URL for the new :class:`Request` object.
-        :param \*\*kwargs: Optional arguments that ``request`` takes.
-        :rtype: requests.Response
-        """
-
-        kwargs.setdefault('allow_redirects', False)
-        return self.request('HEAD', url, **kwargs)
-
-    def post(self, url, data=None, json=None, **kwargs):
-        r"""Sends a POST request. Returns :class:`Response` object.
-
-        :param url: URL for the new :class:`Request` object.
-        :param data: (optional) Dictionary, list of tuples, bytes, or file-like
-            object to send in the body of the :class:`Request`.
-        :param json: (optional) json to send in the body of the :class:`Request`.
-        :param \*\*kwargs: Optional arguments that ``request`` takes.
-        :rtype: requests.Response
-        """
-
-        return self.request('POST', url, data=data, json=json, **kwargs)
-
-    def put(self, url, data=None, **kwargs):
-        r"""Sends a PUT request. Returns :class:`Response` object.
-
-        :param url: URL for the new :class:`Request` object.
-        :param data: (optional) Dictionary, list of tuples, bytes, or file-like
-            object to send in the body of the :class:`Request`.
-        :param \*\*kwargs: Optional arguments that ``request`` takes.
-        :rtype: requests.Response
-        """
-
-        return self.request('PUT', url, data=data, **kwargs)
-
-    def patch(self, url, data=None, **kwargs):
-        r"""Sends a PATCH request. Returns :class:`Response` object.
-
-        :param url: URL for the new :class:`Request` object.
-        :param data: (optional) Dictionary, list of tuples, bytes, or file-like
-            object to send in the body of the :class:`Request`.
-        :param \*\*kwargs: Optional arguments that ``request`` takes.
-        :rtype: requests.Response
-        """
-
-        return self.request('PATCH', url, data=data, **kwargs)
-
-    def delete(self, url, **kwargs):
-        r"""Sends a DELETE request. Returns :class:`Response` object.
-
-        :param url: URL for the new :class:`Request` object.
-        :param \*\*kwargs: Optional arguments that ``request`` takes.
-        :rtype: requests.Response
-        """
-
-        return self.request('DELETE', url, **kwargs)
-
-    def send(self, request, **kwargs):
-        """Send a given PreparedRequest.
-
-        :rtype: requests.Response
-        """
-        # Set defaults that the hooks can utilize to ensure they always have
-        # the correct parameters to reproduce the previous request.
-        kwargs.setdefault('stream', self.stream)
-        kwargs.setdefault('verify', self.verify)
-        kwargs.setdefault('cert', self.cert)
-        kwargs.setdefault('proxies', self.proxies)
-
-        # It's possible that users might accidentally send a Request object.
-        # Guard against that specific failure case.
-        if isinstance(request, Request):
-            raise ValueError('You can only send PreparedRequests.')
-
-        # Set up variables needed for resolve_redirects and dispatching of hooks
-        allow_redirects = kwargs.pop('allow_redirects', True)
-        stream = kwargs.get('stream')
-        hooks = request.hooks
-
-        # Get the appropriate adapter to use
-        adapter = self.get_adapter(url=request.url)
-
-        # Start time (approximately) of the request
-        start = preferred_clock()
-
-        # Send the request
-        r = adapter.send(request, **kwargs)
-
-        # Total elapsed time of the request (approximately)
-        elapsed = preferred_clock() - start
-        r.elapsed = timedelta(seconds=elapsed)
-
-        # Response manipulation hooks
-        r = dispatch_hook('response', hooks, r, **kwargs)
-
-        # Persist cookies
-        if r.history:
-
-            # If the hooks create history then we want those cookies too
-            for resp in r.history:
-                extract_cookies_to_jar(self.cookies, resp.request, resp.raw)
-
-        extract_cookies_to_jar(self.cookies, request, r.raw)
-
-        # Redirect resolving generator.
-        gen = self.resolve_redirects(r, request, **kwargs)
-
-        # Resolve redirects if allowed.
-        history = [resp for resp in gen] if allow_redirects else []
-
-        # Shuffle things around if there's history.
-        if history:
-            # Insert the first (original) request at the start
-            history.insert(0, r)
-            # Get the last request made
-            r = history.pop()
-            r.history = history
-
-        # If redirects aren't being followed, store the response on the Request for Response.next().
-        if not allow_redirects:
-            try:
-                r._next = next(self.resolve_redirects(r, request, yield_requests=True, **kwargs))
-            except StopIteration:
-                pass
-
-        if not stream:
-            r.content
-
-        return r
-
-    def merge_environment_settings(self, url, proxies, stream, verify, cert):
-        """
-        Check the environment and merge it with some settings.
-
-        :rtype: dict
-        """
-        # Gather clues from the surrounding environment.
-        if self.trust_env:
-            # Set environment's proxies.
-            no_proxy = proxies.get('no_proxy') if proxies is not None else None
-            env_proxies = get_environ_proxies(url, no_proxy=no_proxy)
-            for (k, v) in env_proxies.items():
-                proxies.setdefault(k, v)
-
-            # Look for requests environment configuration and be compatible
-            # with cURL.
-            if verify is True or verify is None:
-                verify = (os.environ.get('REQUESTS_CA_BUNDLE') or
-                          os.environ.get('CURL_CA_BUNDLE'))
-
-        # Merge all the kwargs.
-        proxies = merge_setting(proxies, self.proxies)
-        stream = merge_setting(stream, self.stream)
-        verify = merge_setting(verify, self.verify)
-        cert = merge_setting(cert, self.cert)
-
-        return {'verify': verify, 'proxies': proxies, 'stream': stream,
-                'cert': cert}
-
-    def get_adapter(self, url):
-        """
-        Returns the appropriate connection adapter for the given URL.
-
-        :rtype: requests.adapters.BaseAdapter
-        """
-        for (prefix, adapter) in self.adapters.items():
-
-            if url.lower().startswith(prefix.lower()):
-                return adapter
-
-        # Nothing matches :-/
-        raise InvalidSchema("No connection adapters were found for '%s'" % url)
-
-    def close(self):
-        """Closes all adapters and as such the session"""
-        for v in self.adapters.values():
-            v.close()
-
-    def mount(self, prefix, adapter):
-        """Registers a connection adapter to a prefix.
-
-        Adapters are sorted in descending order by prefix length.
-        """
-        self.adapters[prefix] = adapter
-        keys_to_move = [k for k in self.adapters if len(k) < len(prefix)]
-
-        for key in keys_to_move:
-            self.adapters[key] = self.adapters.pop(key)
-
-    def __getstate__(self):
-        state = {attr: getattr(self, attr, None) for attr in self.__attrs__}
-        return state
-
-    def __setstate__(self, state):
-        for attr, value in state.items():
-            setattr(self, attr, value)
-
-
-def session():
-    """
-    Returns a :class:`Session` for context-management.
-
-    .. deprecated:: 1.0.0
-
-        This method has been deprecated since version 1.0.0 and is only kept for
-        backwards compatibility. New code should use :class:`~requests.sessions.Session`
-        to create a session. This may be removed at a future date.
-
-    :rtype: Session
-    """
-    return Session()
diff --git a/venv/lib/python3.7/site-packages/requests/status_codes.py b/venv/lib/python3.7/site-packages/requests/status_codes.py
deleted file mode 100644
index 813e8c4..0000000
--- a/venv/lib/python3.7/site-packages/requests/status_codes.py
+++ /dev/null
@@ -1,120 +0,0 @@
-# -*- coding: utf-8 -*-
-
-r"""
-The ``codes`` object defines a mapping from common names for HTTP statuses
-to their numerical codes, accessible either as attributes or as dictionary
-items.
-
->>> requests.codes['temporary_redirect']
-307
->>> requests.codes.teapot
-418
->>> requests.codes['\o/']
-200
-
-Some codes have multiple names, and both upper- and lower-case versions of
-the names are allowed. For example, ``codes.ok``, ``codes.OK``, and
-``codes.okay`` all correspond to the HTTP status code 200.
-"""
-
-from .structures import LookupDict
-
-_codes = {
-
-    # Informational.
-    100: ('continue',),
-    101: ('switching_protocols',),
-    102: ('processing',),
-    103: ('checkpoint',),
-    122: ('uri_too_long', 'request_uri_too_long'),
-    200: ('ok', 'okay', 'all_ok', 'all_okay', 'all_good', '\\o/', '✓'),
-    201: ('created',),
-    202: ('accepted',),
-    203: ('non_authoritative_info', 'non_authoritative_information'),
-    204: ('no_content',),
-    205: ('reset_content', 'reset'),
-    206: ('partial_content', 'partial'),
-    207: ('multi_status', 'multiple_status', 'multi_stati', 'multiple_stati'),
-    208: ('already_reported',),
-    226: ('im_used',),
-
-    # Redirection.
-    300: ('multiple_choices',),
-    301: ('moved_permanently', 'moved', '\\o-'),
-    302: ('found',),
-    303: ('see_other', 'other'),
-    304: ('not_modified',),
-    305: ('use_proxy',),
-    306: ('switch_proxy',),
-    307: ('temporary_redirect', 'temporary_moved', 'temporary'),
-    308: ('permanent_redirect',
-          'resume_incomplete', 'resume',),  # These 2 to be removed in 3.0
-
-    # Client Error.
-    400: ('bad_request', 'bad'),
-    401: ('unauthorized',),
-    402: ('payment_required', 'payment'),
-    403: ('forbidden',),
-    404: ('not_found', '-o-'),
-    405: ('method_not_allowed', 'not_allowed'),
-    406: ('not_acceptable',),
-    407: ('proxy_authentication_required', 'proxy_auth', 'proxy_authentication'),
-    408: ('request_timeout', 'timeout'),
-    409: ('conflict',),
-    410: ('gone',),
-    411: ('length_required',),
-    412: ('precondition_failed', 'precondition'),
-    413: ('request_entity_too_large',),
-    414: ('request_uri_too_large',),
-    415: ('unsupported_media_type', 'unsupported_media', 'media_type'),
-    416: ('requested_range_not_satisfiable', 'requested_range', 'range_not_satisfiable'),
-    417: ('expectation_failed',),
-    418: ('im_a_teapot', 'teapot', 'i_am_a_teapot'),
-    421: ('misdirected_request',),
-    422: ('unprocessable_entity', 'unprocessable'),
-    423: ('locked',),
-    424: ('failed_dependency', 'dependency'),
-    425: ('unordered_collection', 'unordered'),
-    426: ('upgrade_required', 'upgrade'),
-    428: ('precondition_required', 'precondition'),
-    429: ('too_many_requests', 'too_many'),
-    431: ('header_fields_too_large', 'fields_too_large'),
-    444: ('no_response', 'none'),
-    449: ('retry_with', 'retry'),
-    450: ('blocked_by_windows_parental_controls', 'parental_controls'),
-    451: ('unavailable_for_legal_reasons', 'legal_reasons'),
-    499: ('client_closed_request',),
-
-    # Server Error.
-    500: ('internal_server_error', 'server_error', '/o\\', '✗'),
-    501: ('not_implemented',),
-    502: ('bad_gateway',),
-    503: ('service_unavailable', 'unavailable'),
-    504: ('gateway_timeout',),
-    505: ('http_version_not_supported', 'http_version'),
-    506: ('variant_also_negotiates',),
-    507: ('insufficient_storage',),
-    509: ('bandwidth_limit_exceeded', 'bandwidth'),
-    510: ('not_extended',),
-    511: ('network_authentication_required', 'network_auth', 'network_authentication'),
-}
-
-codes = LookupDict(name='status_codes')
-
-def _init():
-    for code, titles in _codes.items():
-        for title in titles:
-            setattr(codes, title, code)
-            if not title.startswith(('\\', '/')):
-                setattr(codes, title.upper(), code)
-
-    def doc(code):
-        names = ', '.join('``%s``' % n for n in _codes[code])
-        return '* %d: %s' % (code, names)
-
-    global __doc__
-    __doc__ = (__doc__ + '\n' +
-               '\n'.join(doc(code) for code in sorted(_codes))
-               if __doc__ is not None else None)
-
-_init()
diff --git a/venv/lib/python3.7/site-packages/requests/structures.py b/venv/lib/python3.7/site-packages/requests/structures.py
deleted file mode 100644
index da930e2..0000000
--- a/venv/lib/python3.7/site-packages/requests/structures.py
+++ /dev/null
@@ -1,103 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-requests.structures
-~~~~~~~~~~~~~~~~~~~
-
-Data structures that power Requests.
-"""
-
-from .compat import OrderedDict, Mapping, MutableMapping
-
-
-class CaseInsensitiveDict(MutableMapping):
-    """A case-insensitive ``dict``-like object.
-
-    Implements all methods and operations of
-    ``MutableMapping`` as well as dict's ``copy``. Also
-    provides ``lower_items``.
-
-    All keys are expected to be strings. The structure remembers the
-    case of the last key to be set, and ``iter(instance)``,
-    ``keys()``, ``items()``, ``iterkeys()``, and ``iteritems()``
-    will contain case-sensitive keys. However, querying and contains
-    testing is case insensitive::
-
-        cid = CaseInsensitiveDict()
-        cid['Accept'] = 'application/json'
-        cid['aCCEPT'] == 'application/json'  # True
-        list(cid) == ['Accept']  # True
-
-    For example, ``headers['content-encoding']`` will return the
-    value of a ``'Content-Encoding'`` response header, regardless
-    of how the header name was originally stored.
-
-    If the constructor, ``.update``, or equality comparison
-    operations are given keys that have equal ``.lower()``s, the
-    behavior is undefined.
-    """
-
-    def __init__(self, data=None, **kwargs):
-        self._store = OrderedDict()
-        if data is None:
-            data = {}
-        self.update(data, **kwargs)
-
-    def __setitem__(self, key, value):
-        # Use the lowercased key for lookups, but store the actual
-        # key alongside the value.
-        self._store[key.lower()] = (key, value)
-
-    def __getitem__(self, key):
-        return self._store[key.lower()][1]
-
-    def __delitem__(self, key):
-        del self._store[key.lower()]
-
-    def __iter__(self):
-        return (casedkey for casedkey, mappedvalue in self._store.values())
-
-    def __len__(self):
-        return len(self._store)
-
-    def lower_items(self):
-        """Like iteritems(), but with all lowercase keys."""
-        return (
-            (lowerkey, keyval[1])
-            for (lowerkey, keyval)
-            in self._store.items()
-        )
-
-    def __eq__(self, other):
-        if isinstance(other, Mapping):
-            other = CaseInsensitiveDict(other)
-        else:
-            return NotImplemented
-        # Compare insensitively
-        return dict(self.lower_items()) == dict(other.lower_items())
-
-    # Copy is required
-    def copy(self):
-        return CaseInsensitiveDict(self._store.values())
-
-    def __repr__(self):
-        return str(dict(self.items()))
-
-
-class LookupDict(dict):
-    """Dictionary lookup object."""
-
-    def __init__(self, name=None):
-        self.name = name
-        super(LookupDict, self).__init__()
-
-    def __repr__(self):
-        return '<lookup \'%s\'>' % (self.name)
-
-    def __getitem__(self, key):
-        # We allow fall-through here, so values default to None
-
-        return self.__dict__.get(key, None)
-
-    def get(self, key, default=None):
-        return self.__dict__.get(key, default)
diff --git a/venv/lib/python3.7/site-packages/requests/utils.py b/venv/lib/python3.7/site-packages/requests/utils.py
deleted file mode 100644
index 8170a8d..0000000
--- a/venv/lib/python3.7/site-packages/requests/utils.py
+++ /dev/null
@@ -1,977 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-requests.utils
-~~~~~~~~~~~~~~
-
-This module provides utility functions that are used within Requests
-that are also useful for external consumption.
-"""
-
-import codecs
-import contextlib
-import io
-import os
-import re
-import socket
-import struct
-import sys
-import tempfile
-import warnings
-import zipfile
-
-from .__version__ import __version__
-from . import certs
-# to_native_string is unused here, but imported here for backwards compatibility
-from ._internal_utils import to_native_string
-from .compat import parse_http_list as _parse_list_header
-from .compat import (
-    quote, urlparse, bytes, str, OrderedDict, unquote, getproxies,
-    proxy_bypass, urlunparse, basestring, integer_types, is_py3,
-    proxy_bypass_environment, getproxies_environment, Mapping)
-from .cookies import cookiejar_from_dict
-from .structures import CaseInsensitiveDict
-from .exceptions import (
-    InvalidURL, InvalidHeader, FileModeWarning, UnrewindableBodyError)
-
-NETRC_FILES = ('.netrc', '_netrc')
-
-DEFAULT_CA_BUNDLE_PATH = certs.where()
-
-DEFAULT_PORTS = {'http': 80, 'https': 443}
-
-
-if sys.platform == 'win32':
-    # provide a proxy_bypass version on Windows without DNS lookups
-
-    def proxy_bypass_registry(host):
-        try:
-            if is_py3:
-                import winreg
-            else:
-                import _winreg as winreg
-        except ImportError:
-            return False
-
-        try:
-            internetSettings = winreg.OpenKey(winreg.HKEY_CURRENT_USER,
-                r'Software\Microsoft\Windows\CurrentVersion\Internet Settings')
-            # ProxyEnable could be REG_SZ or REG_DWORD, normalizing it
-            proxyEnable = int(winreg.QueryValueEx(internetSettings,
-                                              'ProxyEnable')[0])
-            # ProxyOverride is almost always a string
-            proxyOverride = winreg.QueryValueEx(internetSettings,
-                                                'ProxyOverride')[0]
-        except OSError:
-            return False
-        if not proxyEnable or not proxyOverride:
-            return False
-
-        # make a check value list from the registry entry: replace the
-        # '<local>' string by the localhost entry and the corresponding
-        # canonical entry.
-        proxyOverride = proxyOverride.split(';')
-        # now check if we match one of the registry values.
-        for test in proxyOverride:
-            if test == '<local>':
-                if '.' not in host:
-                    return True
-            test = test.replace(".", r"\.")     # mask dots
-            test = test.replace("*", r".*")     # change glob sequence
-            test = test.replace("?", r".")      # change glob char
-            if re.match(test, host, re.I):
-                return True
-        return False
-
-    def proxy_bypass(host):  # noqa
-        """Return True, if the host should be bypassed.
-
-        Checks proxy settings gathered from the environment, if specified,
-        or the registry.
-        """
-        if getproxies_environment():
-            return proxy_bypass_environment(host)
-        else:
-            return proxy_bypass_registry(host)
-
-
-def dict_to_sequence(d):
-    """Returns an internal sequence dictionary update."""
-
-    if hasattr(d, 'items'):
-        d = d.items()
-
-    return d
-
-
-def super_len(o):
-    total_length = None
-    current_position = 0
-
-    if hasattr(o, '__len__'):
-        total_length = len(o)
-
-    elif hasattr(o, 'len'):
-        total_length = o.len
-
-    elif hasattr(o, 'fileno'):
-        try:
-            fileno = o.fileno()
-        except io.UnsupportedOperation:
-            pass
-        else:
-            total_length = os.fstat(fileno).st_size
-
-            # Having used fstat to determine the file length, we need to
-            # confirm that this file was opened up in binary mode.
-            if 'b' not in o.mode:
-                warnings.warn((
-                    "Requests has determined the content-length for this "
-                    "request using the binary size of the file: however, the "
-                    "file has been opened in text mode (i.e. without the 'b' "
-                    "flag in the mode). This may lead to an incorrect "
-                    "content-length. In Requests 3.0, support will be removed "
-                    "for files in text mode."),
-                    FileModeWarning
-                )
-
-    if hasattr(o, 'tell'):
-        try:
-            current_position = o.tell()
-        except (OSError, IOError):
-            # This can happen in some weird situations, such as when the file
-            # is actually a special file descriptor like stdin. In this
-            # instance, we don't know what the length is, so set it to zero and
-            # let requests chunk it instead.
-            if total_length is not None:
-                current_position = total_length
-        else:
-            if hasattr(o, 'seek') and total_length is None:
-                # StringIO and BytesIO have seek but no useable fileno
-                try:
-                    # seek to end of file
-                    o.seek(0, 2)
-                    total_length = o.tell()
-
-                    # seek back to current position to support
-                    # partially read file-like objects
-                    o.seek(current_position or 0)
-                except (OSError, IOError):
-                    total_length = 0
-
-    if total_length is None:
-        total_length = 0
-
-    return max(0, total_length - current_position)
-
-
-def get_netrc_auth(url, raise_errors=False):
-    """Returns the Requests tuple auth for a given url from netrc."""
-
-    try:
-        from netrc import netrc, NetrcParseError
-
-        netrc_path = None
-
-        for f in NETRC_FILES:
-            try:
-                loc = os.path.expanduser('~/{}'.format(f))
-            except KeyError:
-                # os.path.expanduser can fail when $HOME is undefined and
-                # getpwuid fails. See https://bugs.python.org/issue20164 &
-                # https://github.com/requests/requests/issues/1846
-                return
-
-            if os.path.exists(loc):
-                netrc_path = loc
-                break
-
-        # Abort early if there isn't one.
-        if netrc_path is None:
-            return
-
-        ri = urlparse(url)
-
-        # Strip port numbers from netloc. This weird `if...encode`` dance is
-        # used for Python 3.2, which doesn't support unicode literals.
-        splitstr = b':'
-        if isinstance(url, str):
-            splitstr = splitstr.decode('ascii')
-        host = ri.netloc.split(splitstr)[0]
-
-        try:
-            _netrc = netrc(netrc_path).authenticators(host)
-            if _netrc:
-                # Return with login / password
-                login_i = (0 if _netrc[0] else 1)
-                return (_netrc[login_i], _netrc[2])
-        except (NetrcParseError, IOError):
-            # If there was a parsing error or a permissions issue reading the file,
-            # we'll just skip netrc auth unless explicitly asked to raise errors.
-            if raise_errors:
-                raise
-
-    # AppEngine hackiness.
-    except (ImportError, AttributeError):
-        pass
-
-
-def guess_filename(obj):
-    """Tries to guess the filename of the given object."""
-    name = getattr(obj, 'name', None)
-    if (name and isinstance(name, basestring) and name[0] != '<' and
-            name[-1] != '>'):
-        return os.path.basename(name)
-
-
-def extract_zipped_paths(path):
-    """Replace nonexistent paths that look like they refer to a member of a zip
-    archive with the location of an extracted copy of the target, or else
-    just return the provided path unchanged.
-    """
-    if os.path.exists(path):
-        # this is already a valid path, no need to do anything further
-        return path
-
-    # find the first valid part of the provided path and treat that as a zip archive
-    # assume the rest of the path is the name of a member in the archive
-    archive, member = os.path.split(path)
-    while archive and not os.path.exists(archive):
-        archive, prefix = os.path.split(archive)
-        member = '/'.join([prefix, member])
-
-    if not zipfile.is_zipfile(archive):
-        return path
-
-    zip_file = zipfile.ZipFile(archive)
-    if member not in zip_file.namelist():
-        return path
-
-    # we have a valid zip archive and a valid member of that archive
-    tmp = tempfile.gettempdir()
-    extracted_path = os.path.join(tmp, *member.split('/'))
-    if not os.path.exists(extracted_path):
-        extracted_path = zip_file.extract(member, path=tmp)
-
-    return extracted_path
-
-
-def from_key_val_list(value):
-    """Take an object and test to see if it can be represented as a
-    dictionary. Unless it can not be represented as such, return an
-    OrderedDict, e.g.,
-
-    ::
-
-        >>> from_key_val_list([('key', 'val')])
-        OrderedDict([('key', 'val')])
-        >>> from_key_val_list('string')
-        ValueError: cannot encode objects that are not 2-tuples
-        >>> from_key_val_list({'key': 'val'})
-        OrderedDict([('key', 'val')])
-
-    :rtype: OrderedDict
-    """
-    if value is None:
-        return None
-
-    if isinstance(value, (str, bytes, bool, int)):
-        raise ValueError('cannot encode objects that are not 2-tuples')
-
-    return OrderedDict(value)
-
-
-def to_key_val_list(value):
-    """Take an object and test to see if it can be represented as a
-    dictionary. If it can be, return a list of tuples, e.g.,
-
-    ::
-
-        >>> to_key_val_list([('key', 'val')])
-        [('key', 'val')]
-        >>> to_key_val_list({'key': 'val'})
-        [('key', 'val')]
-        >>> to_key_val_list('string')
-        ValueError: cannot encode objects that are not 2-tuples.
-
-    :rtype: list
-    """
-    if value is None:
-        return None
-
-    if isinstance(value, (str, bytes, bool, int)):
-        raise ValueError('cannot encode objects that are not 2-tuples')
-
-    if isinstance(value, Mapping):
-        value = value.items()
-
-    return list(value)
-
-
-# From mitsuhiko/werkzeug (used with permission).
-def parse_list_header(value):
-    """Parse lists as described by RFC 2068 Section 2.
-
-    In particular, parse comma-separated lists where the elements of
-    the list may include quoted-strings.  A quoted-string could
-    contain a comma.  A non-quoted string could have quotes in the
-    middle.  Quotes are removed automatically after parsing.
-
-    It basically works like :func:`parse_set_header` just that items
-    may appear multiple times and case sensitivity is preserved.
-
-    The return value is a standard :class:`list`:
-
-    >>> parse_list_header('token, "quoted value"')
-    ['token', 'quoted value']
-
-    To create a header from the :class:`list` again, use the
-    :func:`dump_header` function.
-
-    :param value: a string with a list header.
-    :return: :class:`list`
-    :rtype: list
-    """
-    result = []
-    for item in _parse_list_header(value):
-        if item[:1] == item[-1:] == '"':
-            item = unquote_header_value(item[1:-1])
-        result.append(item)
-    return result
-
-
-# From mitsuhiko/werkzeug (used with permission).
-def parse_dict_header(value):
-    """Parse lists of key, value pairs as described by RFC 2068 Section 2 and
-    convert them into a python dict:
-
-    >>> d = parse_dict_header('foo="is a fish", bar="as well"')
-    >>> type(d) is dict
-    True
-    >>> sorted(d.items())
-    [('bar', 'as well'), ('foo', 'is a fish')]
-
-    If there is no value for a key it will be `None`:
-
-    >>> parse_dict_header('key_without_value')
-    {'key_without_value': None}
-
-    To create a header from the :class:`dict` again, use the
-    :func:`dump_header` function.
-
-    :param value: a string with a dict header.
-    :return: :class:`dict`
-    :rtype: dict
-    """
-    result = {}
-    for item in _parse_list_header(value):
-        if '=' not in item:
-            result[item] = None
-            continue
-        name, value = item.split('=', 1)
-        if value[:1] == value[-1:] == '"':
-            value = unquote_header_value(value[1:-1])
-        result[name] = value
-    return result
-
-
-# From mitsuhiko/werkzeug (used with permission).
-def unquote_header_value(value, is_filename=False):
-    r"""Unquotes a header value.  (Reversal of :func:`quote_header_value`).
-    This does not use the real unquoting but what browsers are actually
-    using for quoting.
-
-    :param value: the header value to unquote.
-    :rtype: str
-    """
-    if value and value[0] == value[-1] == '"':
-        # this is not the real unquoting, but fixing this so that the
-        # RFC is met will result in bugs with internet explorer and
-        # probably some other browsers as well.  IE for example is
-        # uploading files with "C:\foo\bar.txt" as filename
-        value = value[1:-1]
-
-        # if this is a filename and the starting characters look like
-        # a UNC path, then just return the value without quotes.  Using the
-        # replace sequence below on a UNC path has the effect of turning
-        # the leading double slash into a single slash and then
-        # _fix_ie_filename() doesn't work correctly.  See #458.
-        if not is_filename or value[:2] != '\\\\':
-            return value.replace('\\\\', '\\').replace('\\"', '"')
-    return value
-
-
-def dict_from_cookiejar(cj):
-    """Returns a key/value dictionary from a CookieJar.
-
-    :param cj: CookieJar object to extract cookies from.
-    :rtype: dict
-    """
-
-    cookie_dict = {}
-
-    for cookie in cj:
-        cookie_dict[cookie.name] = cookie.value
-
-    return cookie_dict
-
-
-def add_dict_to_cookiejar(cj, cookie_dict):
-    """Returns a CookieJar from a key/value dictionary.
-
-    :param cj: CookieJar to insert cookies into.
-    :param cookie_dict: Dict of key/values to insert into CookieJar.
-    :rtype: CookieJar
-    """
-
-    return cookiejar_from_dict(cookie_dict, cj)
-
-
-def get_encodings_from_content(content):
-    """Returns encodings from given content string.
-
-    :param content: bytestring to extract encodings from.
-    """
-    warnings.warn((
-        'In requests 3.0, get_encodings_from_content will be removed. For '
-        'more information, please see the discussion on issue #2266. (This'
-        ' warning should only appear once.)'),
-        DeprecationWarning)
-
-    charset_re = re.compile(r'<meta.*?charset=["\']*(.+?)["\'>]', flags=re.I)
-    pragma_re = re.compile(r'<meta.*?content=["\']*;?charset=(.+?)["\'>]', flags=re.I)
-    xml_re = re.compile(r'^<\?xml.*?encoding=["\']*(.+?)["\'>]')
-
-    return (charset_re.findall(content) +
-            pragma_re.findall(content) +
-            xml_re.findall(content))
-
-
-def _parse_content_type_header(header):
-    """Returns content type and parameters from given header
-
-    :param header: string
-    :return: tuple containing content type and dictionary of
-         parameters
-    """
-
-    tokens = header.split(';')
-    content_type, params = tokens[0].strip(), tokens[1:]
-    params_dict = {}
-    items_to_strip = "\"' "
-
-    for param in params:
-        param = param.strip()
-        if param:
-            key, value = param, True
-            index_of_equals = param.find("=")
-            if index_of_equals != -1:
-                key = param[:index_of_equals].strip(items_to_strip)
-                value = param[index_of_equals + 1:].strip(items_to_strip)
-            params_dict[key.lower()] = value
-    return content_type, params_dict
-
-
-def get_encoding_from_headers(headers):
-    """Returns encodings from given HTTP Header Dict.
-
-    :param headers: dictionary to extract encoding from.
-    :rtype: str
-    """
-
-    content_type = headers.get('content-type')
-
-    if not content_type:
-        return None
-
-    content_type, params = _parse_content_type_header(content_type)
-
-    if 'charset' in params:
-        return params['charset'].strip("'\"")
-
-    if 'text' in content_type:
-        return 'ISO-8859-1'
-
-
-def stream_decode_response_unicode(iterator, r):
-    """Stream decodes a iterator."""
-
-    if r.encoding is None:
-        for item in iterator:
-            yield item
-        return
-
-    decoder = codecs.getincrementaldecoder(r.encoding)(errors='replace')
-    for chunk in iterator:
-        rv = decoder.decode(chunk)
-        if rv:
-            yield rv
-    rv = decoder.decode(b'', final=True)
-    if rv:
-        yield rv
-
-
-def iter_slices(string, slice_length):
-    """Iterate over slices of a string."""
-    pos = 0
-    if slice_length is None or slice_length <= 0:
-        slice_length = len(string)
-    while pos < len(string):
-        yield string[pos:pos + slice_length]
-        pos += slice_length
-
-
-def get_unicode_from_response(r):
-    """Returns the requested content back in unicode.
-
-    :param r: Response object to get unicode content from.
-
-    Tried:
-
-    1. charset from content-type
-    2. fall back and replace all unicode characters
-
-    :rtype: str
-    """
-    warnings.warn((
-        'In requests 3.0, get_unicode_from_response will be removed. For '
-        'more information, please see the discussion on issue #2266. (This'
-        ' warning should only appear once.)'),
-        DeprecationWarning)
-
-    tried_encodings = []
-
-    # Try charset from content-type
-    encoding = get_encoding_from_headers(r.headers)
-
-    if encoding:
-        try:
-            return str(r.content, encoding)
-        except UnicodeError:
-            tried_encodings.append(encoding)
-
-    # Fall back:
-    try:
-        return str(r.content, encoding, errors='replace')
-    except TypeError:
-        return r.content
-
-
-# The unreserved URI characters (RFC 3986)
-UNRESERVED_SET = frozenset(
-    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz" + "0123456789-._~")
-
-
-def unquote_unreserved(uri):
-    """Un-escape any percent-escape sequences in a URI that are unreserved
-    characters. This leaves all reserved, illegal and non-ASCII bytes encoded.
-
-    :rtype: str
-    """
-    parts = uri.split('%')
-    for i in range(1, len(parts)):
-        h = parts[i][0:2]
-        if len(h) == 2 and h.isalnum():
-            try:
-                c = chr(int(h, 16))
-            except ValueError:
-                raise InvalidURL("Invalid percent-escape sequence: '%s'" % h)
-
-            if c in UNRESERVED_SET:
-                parts[i] = c + parts[i][2:]
-            else:
-                parts[i] = '%' + parts[i]
-        else:
-            parts[i] = '%' + parts[i]
-    return ''.join(parts)
-
-
-def requote_uri(uri):
-    """Re-quote the given URI.
-
-    This function passes the given URI through an unquote/quote cycle to
-    ensure that it is fully and consistently quoted.
-
-    :rtype: str
-    """
-    safe_with_percent = "!#$%&'()*+,/:;=?@[]~"
-    safe_without_percent = "!#$&'()*+,/:;=?@[]~"
-    try:
-        # Unquote only the unreserved characters
-        # Then quote only illegal characters (do not quote reserved,
-        # unreserved, or '%')
-        return quote(unquote_unreserved(uri), safe=safe_with_percent)
-    except InvalidURL:
-        # We couldn't unquote the given URI, so let's try quoting it, but
-        # there may be unquoted '%'s in the URI. We need to make sure they're
-        # properly quoted so they do not cause issues elsewhere.
-        return quote(uri, safe=safe_without_percent)
-
-
-def address_in_network(ip, net):
-    """This function allows you to check if an IP belongs to a network subnet
-
-    Example: returns True if ip = 192.168.1.1 and net = 192.168.1.0/24
-             returns False if ip = 192.168.1.1 and net = 192.168.100.0/24
-
-    :rtype: bool
-    """
-    ipaddr = struct.unpack('=L', socket.inet_aton(ip))[0]
-    netaddr, bits = net.split('/')
-    netmask = struct.unpack('=L', socket.inet_aton(dotted_netmask(int(bits))))[0]
-    network = struct.unpack('=L', socket.inet_aton(netaddr))[0] & netmask
-    return (ipaddr & netmask) == (network & netmask)
-
-
-def dotted_netmask(mask):
-    """Converts mask from /xx format to xxx.xxx.xxx.xxx
-
-    Example: if mask is 24 function returns 255.255.255.0
-
-    :rtype: str
-    """
-    bits = 0xffffffff ^ (1 << 32 - mask) - 1
-    return socket.inet_ntoa(struct.pack('>I', bits))
-
-
-def is_ipv4_address(string_ip):
-    """
-    :rtype: bool
-    """
-    try:
-        socket.inet_aton(string_ip)
-    except socket.error:
-        return False
-    return True
-
-
-def is_valid_cidr(string_network):
-    """
-    Very simple check of the cidr format in no_proxy variable.
-
-    :rtype: bool
-    """
-    if string_network.count('/') == 1:
-        try:
-            mask = int(string_network.split('/')[1])
-        except ValueError:
-            return False
-
-        if mask < 1 or mask > 32:
-            return False
-
-        try:
-            socket.inet_aton(string_network.split('/')[0])
-        except socket.error:
-            return False
-    else:
-        return False
-    return True
-
-
-@contextlib.contextmanager
-def set_environ(env_name, value):
-    """Set the environment variable 'env_name' to 'value'
-
-    Save previous value, yield, and then restore the previous value stored in
-    the environment variable 'env_name'.
-
-    If 'value' is None, do nothing"""
-    value_changed = value is not None
-    if value_changed:
-        old_value = os.environ.get(env_name)
-        os.environ[env_name] = value
-    try:
-        yield
-    finally:
-        if value_changed:
-            if old_value is None:
-                del os.environ[env_name]
-            else:
-                os.environ[env_name] = old_value
-
-
-def should_bypass_proxies(url, no_proxy):
-    """
-    Returns whether we should bypass proxies or not.
-
-    :rtype: bool
-    """
-    # Prioritize lowercase environment variables over uppercase
-    # to keep a consistent behaviour with other http projects (curl, wget).
-    get_proxy = lambda k: os.environ.get(k) or os.environ.get(k.upper())
-
-    # First check whether no_proxy is defined. If it is, check that the URL
-    # we're getting isn't in the no_proxy list.
-    no_proxy_arg = no_proxy
-    if no_proxy is None:
-        no_proxy = get_proxy('no_proxy')
-    parsed = urlparse(url)
-
-    if parsed.hostname is None:
-        # URLs don't always have hostnames, e.g. file:/// urls.
-        return True
-
-    if no_proxy:
-        # We need to check whether we match here. We need to see if we match
-        # the end of the hostname, both with and without the port.
-        no_proxy = (
-            host for host in no_proxy.replace(' ', '').split(',') if host
-        )
-
-        if is_ipv4_address(parsed.hostname):
-            for proxy_ip in no_proxy:
-                if is_valid_cidr(proxy_ip):
-                    if address_in_network(parsed.hostname, proxy_ip):
-                        return True
-                elif parsed.hostname == proxy_ip:
-                    # If no_proxy ip was defined in plain IP notation instead of cidr notation &
-                    # matches the IP of the index
-                    return True
-        else:
-            host_with_port = parsed.hostname
-            if parsed.port:
-                host_with_port += ':{}'.format(parsed.port)
-
-            for host in no_proxy:
-                if parsed.hostname.endswith(host) or host_with_port.endswith(host):
-                    # The URL does match something in no_proxy, so we don't want
-                    # to apply the proxies on this URL.
-                    return True
-
-    with set_environ('no_proxy', no_proxy_arg):
-        # parsed.hostname can be `None` in cases such as a file URI.
-        try:
-            bypass = proxy_bypass(parsed.hostname)
-        except (TypeError, socket.gaierror):
-            bypass = False
-
-    if bypass:
-        return True
-
-    return False
-
-
-def get_environ_proxies(url, no_proxy=None):
-    """
-    Return a dict of environment proxies.
-
-    :rtype: dict
-    """
-    if should_bypass_proxies(url, no_proxy=no_proxy):
-        return {}
-    else:
-        return getproxies()
-
-
-def select_proxy(url, proxies):
-    """Select a proxy for the url, if applicable.
-
-    :param url: The url being for the request
-    :param proxies: A dictionary of schemes or schemes and hosts to proxy URLs
-    """
-    proxies = proxies or {}
-    urlparts = urlparse(url)
-    if urlparts.hostname is None:
-        return proxies.get(urlparts.scheme, proxies.get('all'))
-
-    proxy_keys = [
-        urlparts.scheme + '://' + urlparts.hostname,
-        urlparts.scheme,
-        'all://' + urlparts.hostname,
-        'all',
-    ]
-    proxy = None
-    for proxy_key in proxy_keys:
-        if proxy_key in proxies:
-            proxy = proxies[proxy_key]
-            break
-
-    return proxy
-
-
-def default_user_agent(name="python-requests"):
-    """
-    Return a string representing the default user agent.
-
-    :rtype: str
-    """
-    return '%s/%s' % (name, __version__)
-
-
-def default_headers():
-    """
-    :rtype: requests.structures.CaseInsensitiveDict
-    """
-    return CaseInsensitiveDict({
-        'User-Agent': default_user_agent(),
-        'Accept-Encoding': ', '.join(('gzip', 'deflate')),
-        'Accept': '*/*',
-        'Connection': 'keep-alive',
-    })
-
-
-def parse_header_links(value):
-    """Return a list of parsed link headers proxies.
-
-    i.e. Link: <http:/.../front.jpeg>; rel=front; type="image/jpeg",<http://.../back.jpeg>; rel=back;type="image/jpeg"
-
-    :rtype: list
-    """
-
-    links = []
-
-    replace_chars = ' \'"'
-
-    value = value.strip(replace_chars)
-    if not value:
-        return links
-
-    for val in re.split(', *<', value):
-        try:
-            url, params = val.split(';', 1)
-        except ValueError:
-            url, params = val, ''
-
-        link = {'url': url.strip('<> \'"')}
-
-        for param in params.split(';'):
-            try:
-                key, value = param.split('=')
-            except ValueError:
-                break
-
-            link[key.strip(replace_chars)] = value.strip(replace_chars)
-
-        links.append(link)
-
-    return links
-
-
-# Null bytes; no need to recreate these on each call to guess_json_utf
-_null = '\x00'.encode('ascii')  # encoding to ASCII for Python 3
-_null2 = _null * 2
-_null3 = _null * 3
-
-
-def guess_json_utf(data):
-    """
-    :rtype: str
-    """
-    # JSON always starts with two ASCII characters, so detection is as
-    # easy as counting the nulls and from their location and count
-    # determine the encoding. Also detect a BOM, if present.
-    sample = data[:4]
-    if sample in (codecs.BOM_UTF32_LE, codecs.BOM_UTF32_BE):
-        return 'utf-32'     # BOM included
-    if sample[:3] == codecs.BOM_UTF8:
-        return 'utf-8-sig'  # BOM included, MS style (discouraged)
-    if sample[:2] in (codecs.BOM_UTF16_LE, codecs.BOM_UTF16_BE):
-        return 'utf-16'     # BOM included
-    nullcount = sample.count(_null)
-    if nullcount == 0:
-        return 'utf-8'
-    if nullcount == 2:
-        if sample[::2] == _null2:   # 1st and 3rd are null
-            return 'utf-16-be'
-        if sample[1::2] == _null2:  # 2nd and 4th are null
-            return 'utf-16-le'
-        # Did not detect 2 valid UTF-16 ascii-range characters
-    if nullcount == 3:
-        if sample[:3] == _null3:
-            return 'utf-32-be'
-        if sample[1:] == _null3:
-            return 'utf-32-le'
-        # Did not detect a valid UTF-32 ascii-range character
-    return None
-
-
-def prepend_scheme_if_needed(url, new_scheme):
-    """Given a URL that may or may not have a scheme, prepend the given scheme.
-    Does not replace a present scheme with the one provided as an argument.
-
-    :rtype: str
-    """
-    scheme, netloc, path, params, query, fragment = urlparse(url, new_scheme)
-
-    # urlparse is a finicky beast, and sometimes decides that there isn't a
-    # netloc present. Assume that it's being over-cautious, and switch netloc
-    # and path if urlparse decided there was no netloc.
-    if not netloc:
-        netloc, path = path, netloc
-
-    return urlunparse((scheme, netloc, path, params, query, fragment))
-
-
-def get_auth_from_url(url):
-    """Given a url with authentication components, extract them into a tuple of
-    username,password.
-
-    :rtype: (str,str)
-    """
-    parsed = urlparse(url)
-
-    try:
-        auth = (unquote(parsed.username), unquote(parsed.password))
-    except (AttributeError, TypeError):
-        auth = ('', '')
-
-    return auth
-
-
-# Moved outside of function to avoid recompile every call
-_CLEAN_HEADER_REGEX_BYTE = re.compile(b'^\\S[^\\r\\n]*$|^$')
-_CLEAN_HEADER_REGEX_STR = re.compile(r'^\S[^\r\n]*$|^$')
-
-
-def check_header_validity(header):
-    """Verifies that header value is a string which doesn't contain
-    leading whitespace or return characters. This prevents unintended
-    header injection.
-
-    :param header: tuple, in the format (name, value).
-    """
-    name, value = header
-
-    if isinstance(value, bytes):
-        pat = _CLEAN_HEADER_REGEX_BYTE
-    else:
-        pat = _CLEAN_HEADER_REGEX_STR
-    try:
-        if not pat.match(value):
-            raise InvalidHeader("Invalid return character or leading space in header: %s" % name)
-    except TypeError:
-        raise InvalidHeader("Value for header {%s: %s} must be of type str or "
-                            "bytes, not %s" % (name, value, type(value)))
-
-
-def urldefragauth(url):
-    """
-    Given a url remove the fragment and the authentication part.
-
-    :rtype: str
-    """
-    scheme, netloc, path, params, query, fragment = urlparse(url)
-
-    # see func:`prepend_scheme_if_needed`
-    if not netloc:
-        netloc, path = path, netloc
-
-    netloc = netloc.rsplit('@', 1)[-1]
-
-    return urlunparse((scheme, netloc, path, params, query, ''))
-
-
-def rewind_body(prepared_request):
-    """Move file pointer back to its recorded starting position
-    so it can be read again on redirect.
-    """
-    body_seek = getattr(prepared_request.body, 'seek', None)
-    if body_seek is not None and isinstance(prepared_request._body_position, integer_types):
-        try:
-            body_seek(prepared_request._body_position)
-        except (IOError, OSError):
-            raise UnrewindableBodyError("An error occurred when rewinding request "
-                                        "body for redirect.")
-    else:
-        raise UnrewindableBodyError("Unable to rewind request body for redirect.")
diff --git a/venv/lib/python3.7/site-packages/setuptools-40.8.0-py3.7.egg b/venv/lib/python3.7/site-packages/setuptools-40.8.0-py3.7.egg
deleted file mode 100644
index a3a7473..0000000
Binary files a/venv/lib/python3.7/site-packages/setuptools-40.8.0-py3.7.egg and /dev/null differ
diff --git a/venv/lib/python3.7/site-packages/setuptools.pth b/venv/lib/python3.7/site-packages/setuptools.pth
deleted file mode 100644
index ca49991..0000000
--- a/venv/lib/python3.7/site-packages/setuptools.pth
+++ /dev/null
@@ -1 +0,0 @@
-./setuptools-40.8.0-py3.7.egg
diff --git a/venv/lib/python3.7/site-packages/tornado/__init__.py b/venv/lib/python3.7/site-packages/tornado/__init__.py
deleted file mode 100644
index a1094a6..0000000
--- a/venv/lib/python3.7/site-packages/tornado/__init__.py
+++ /dev/null
@@ -1,26 +0,0 @@
-#
-# Copyright 2009 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-"""The Tornado web server and tools."""
-
-# version is a human-readable version number.
-
-# version_info is a four-tuple for programmatic comparison. The first
-# three numbers are the components of the version number.  The fourth
-# is zero for an official release, positive for a development branch,
-# or negative for a release candidate or beta (after the base version
-# number has been incremented)
-version = "6.0.3"
-version_info = (6, 0, 3, 0)
diff --git a/venv/lib/python3.7/site-packages/tornado/_locale_data.py b/venv/lib/python3.7/site-packages/tornado/_locale_data.py
deleted file mode 100644
index 91416d9..0000000
--- a/venv/lib/python3.7/site-packages/tornado/_locale_data.py
+++ /dev/null
@@ -1,82 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-# Copyright 2012 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-"""Data used by the tornado.locale module."""
-
-LOCALE_NAMES = {
-    "af_ZA": {"name_en": u"Afrikaans", "name": u"Afrikaans"},
-    "am_ET": {"name_en": u"Amharic", "name": u"አማርኛ"},
-    "ar_AR": {"name_en": u"Arabic", "name": u"العربية"},
-    "bg_BG": {"name_en": u"Bulgarian", "name": u"Български"},
-    "bn_IN": {"name_en": u"Bengali", "name": u"বাংলা"},
-    "bs_BA": {"name_en": u"Bosnian", "name": u"Bosanski"},
-    "ca_ES": {"name_en": u"Catalan", "name": u"Català"},
-    "cs_CZ": {"name_en": u"Czech", "name": u"Čeština"},
-    "cy_GB": {"name_en": u"Welsh", "name": u"Cymraeg"},
-    "da_DK": {"name_en": u"Danish", "name": u"Dansk"},
-    "de_DE": {"name_en": u"German", "name": u"Deutsch"},
-    "el_GR": {"name_en": u"Greek", "name": u"Ελληνικά"},
-    "en_GB": {"name_en": u"English (UK)", "name": u"English (UK)"},
-    "en_US": {"name_en": u"English (US)", "name": u"English (US)"},
-    "es_ES": {"name_en": u"Spanish (Spain)", "name": u"Español (España)"},
-    "es_LA": {"name_en": u"Spanish", "name": u"Español"},
-    "et_EE": {"name_en": u"Estonian", "name": u"Eesti"},
-    "eu_ES": {"name_en": u"Basque", "name": u"Euskara"},
-    "fa_IR": {"name_en": u"Persian", "name": u"فارسی"},
-    "fi_FI": {"name_en": u"Finnish", "name": u"Suomi"},
-    "fr_CA": {"name_en": u"French (Canada)", "name": u"Français (Canada)"},
-    "fr_FR": {"name_en": u"French", "name": u"Français"},
-    "ga_IE": {"name_en": u"Irish", "name": u"Gaeilge"},
-    "gl_ES": {"name_en": u"Galician", "name": u"Galego"},
-    "he_IL": {"name_en": u"Hebrew", "name": u"עברית"},
-    "hi_IN": {"name_en": u"Hindi", "name": u"हिन्दी"},
-    "hr_HR": {"name_en": u"Croatian", "name": u"Hrvatski"},
-    "hu_HU": {"name_en": u"Hungarian", "name": u"Magyar"},
-    "id_ID": {"name_en": u"Indonesian", "name": u"Bahasa Indonesia"},
-    "is_IS": {"name_en": u"Icelandic", "name": u"Íslenska"},
-    "it_IT": {"name_en": u"Italian", "name": u"Italiano"},
-    "ja_JP": {"name_en": u"Japanese", "name": u"日本語"},
-    "ko_KR": {"name_en": u"Korean", "name": u"한국어"},
-    "lt_LT": {"name_en": u"Lithuanian", "name": u"Lietuvių"},
-    "lv_LV": {"name_en": u"Latvian", "name": u"Latviešu"},
-    "mk_MK": {"name_en": u"Macedonian", "name": u"Македонски"},
-    "ml_IN": {"name_en": u"Malayalam", "name": u"മലയാളം"},
-    "ms_MY": {"name_en": u"Malay", "name": u"Bahasa Melayu"},
-    "nb_NO": {"name_en": u"Norwegian (bokmal)", "name": u"Norsk (bokmål)"},
-    "nl_NL": {"name_en": u"Dutch", "name": u"Nederlands"},
-    "nn_NO": {"name_en": u"Norwegian (nynorsk)", "name": u"Norsk (nynorsk)"},
-    "pa_IN": {"name_en": u"Punjabi", "name": u"ਪੰਜਾਬੀ"},
-    "pl_PL": {"name_en": u"Polish", "name": u"Polski"},
-    "pt_BR": {"name_en": u"Portuguese (Brazil)", "name": u"Português (Brasil)"},
-    "pt_PT": {"name_en": u"Portuguese (Portugal)", "name": u"Português (Portugal)"},
-    "ro_RO": {"name_en": u"Romanian", "name": u"Română"},
-    "ru_RU": {"name_en": u"Russian", "name": u"Русский"},
-    "sk_SK": {"name_en": u"Slovak", "name": u"Slovenčina"},
-    "sl_SI": {"name_en": u"Slovenian", "name": u"Slovenščina"},
-    "sq_AL": {"name_en": u"Albanian", "name": u"Shqip"},
-    "sr_RS": {"name_en": u"Serbian", "name": u"Српски"},
-    "sv_SE": {"name_en": u"Swedish", "name": u"Svenska"},
-    "sw_KE": {"name_en": u"Swahili", "name": u"Kiswahili"},
-    "ta_IN": {"name_en": u"Tamil", "name": u"தமிழ்"},
-    "te_IN": {"name_en": u"Telugu", "name": u"తెలుగు"},
-    "th_TH": {"name_en": u"Thai", "name": u"ภาษาไทย"},
-    "tl_PH": {"name_en": u"Filipino", "name": u"Filipino"},
-    "tr_TR": {"name_en": u"Turkish", "name": u"Türkçe"},
-    "uk_UA": {"name_en": u"Ukraini ", "name": u"Українська"},
-    "vi_VN": {"name_en": u"Vietnamese", "name": u"Tiếng Việt"},
-    "zh_CN": {"name_en": u"Chinese (Simplified)", "name": u"中文(简体)"},
-    "zh_TW": {"name_en": u"Chinese (Traditional)", "name": u"中文(繁體)"},
-}
diff --git a/venv/lib/python3.7/site-packages/tornado/auth.py b/venv/lib/python3.7/site-packages/tornado/auth.py
deleted file mode 100644
index db6d290..0000000
--- a/venv/lib/python3.7/site-packages/tornado/auth.py
+++ /dev/null
@@ -1,1182 +0,0 @@
-#
-# Copyright 2009 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-"""This module contains implementations of various third-party
-authentication schemes.
-
-All the classes in this file are class mixins designed to be used with
-the `tornado.web.RequestHandler` class.  They are used in two ways:
-
-* On a login handler, use methods such as ``authenticate_redirect()``,
-  ``authorize_redirect()``, and ``get_authenticated_user()`` to
-  establish the user's identity and store authentication tokens to your
-  database and/or cookies.
-* In non-login handlers, use methods such as ``facebook_request()``
-  or ``twitter_request()`` to use the authentication tokens to make
-  requests to the respective services.
-
-They all take slightly different arguments due to the fact all these
-services implement authentication and authorization slightly differently.
-See the individual service classes below for complete documentation.
-
-Example usage for Google OAuth:
-
-.. testcode::
-
-    class GoogleOAuth2LoginHandler(tornado.web.RequestHandler,
-                                   tornado.auth.GoogleOAuth2Mixin):
-        async def get(self):
-            if self.get_argument('code', False):
-                user = await self.get_authenticated_user(
-                    redirect_uri='http://your.site.com/auth/google',
-                    code=self.get_argument('code'))
-                # Save the user with e.g. set_secure_cookie
-            else:
-                await self.authorize_redirect(
-                    redirect_uri='http://your.site.com/auth/google',
-                    client_id=self.settings['google_oauth']['key'],
-                    scope=['profile', 'email'],
-                    response_type='code',
-                    extra_params={'approval_prompt': 'auto'})
-
-.. testoutput::
-   :hide:
-
-"""
-
-import base64
-import binascii
-import hashlib
-import hmac
-import time
-import urllib.parse
-import uuid
-
-from tornado import httpclient
-from tornado import escape
-from tornado.httputil import url_concat
-from tornado.util import unicode_type
-from tornado.web import RequestHandler
-
-from typing import List, Any, Dict, cast, Iterable, Union, Optional
-
-
-class AuthError(Exception):
-    pass
-
-
-class OpenIdMixin(object):
-    """Abstract implementation of OpenID and Attribute Exchange.
-
-    Class attributes:
-
-    * ``_OPENID_ENDPOINT``: the identity provider's URI.
-    """
-
-    def authenticate_redirect(
-        self,
-        callback_uri: str = None,
-        ax_attrs: List[str] = ["name", "email", "language", "username"],
-    ) -> None:
-        """Redirects to the authentication URL for this service.
-
-        After authentication, the service will redirect back to the given
-        callback URI with additional parameters including ``openid.mode``.
-
-        We request the given attributes for the authenticated user by
-        default (name, email, language, and username). If you don't need
-        all those attributes for your app, you can request fewer with
-        the ax_attrs keyword argument.
-
-        .. versionchanged:: 6.0
-
-            The ``callback`` argument was removed and this method no
-            longer returns an awaitable object. It is now an ordinary
-            synchronous function.
-        """
-        handler = cast(RequestHandler, self)
-        callback_uri = callback_uri or handler.request.uri
-        assert callback_uri is not None
-        args = self._openid_args(callback_uri, ax_attrs=ax_attrs)
-        endpoint = self._OPENID_ENDPOINT  # type: ignore
-        handler.redirect(endpoint + "?" + urllib.parse.urlencode(args))
-
-    async def get_authenticated_user(
-        self, http_client: httpclient.AsyncHTTPClient = None
-    ) -> Dict[str, Any]:
-        """Fetches the authenticated user data upon redirect.
-
-        This method should be called by the handler that receives the
-        redirect from the `authenticate_redirect()` method (which is
-        often the same as the one that calls it; in that case you would
-        call `get_authenticated_user` if the ``openid.mode`` parameter
-        is present and `authenticate_redirect` if it is not).
-
-        The result of this method will generally be used to set a cookie.
-
-        .. versionchanged:: 6.0
-
-            The ``callback`` argument was removed. Use the returned
-            awaitable object instead.
-        """
-        handler = cast(RequestHandler, self)
-        # Verify the OpenID response via direct request to the OP
-        args = dict(
-            (k, v[-1]) for k, v in handler.request.arguments.items()
-        )  # type: Dict[str, Union[str, bytes]]
-        args["openid.mode"] = u"check_authentication"
-        url = self._OPENID_ENDPOINT  # type: ignore
-        if http_client is None:
-            http_client = self.get_auth_http_client()
-        resp = await http_client.fetch(
-            url, method="POST", body=urllib.parse.urlencode(args)
-        )
-        return self._on_authentication_verified(resp)
-
-    def _openid_args(
-        self, callback_uri: str, ax_attrs: Iterable[str] = [], oauth_scope: str = None
-    ) -> Dict[str, str]:
-        handler = cast(RequestHandler, self)
-        url = urllib.parse.urljoin(handler.request.full_url(), callback_uri)
-        args = {
-            "openid.ns": "http://specs.openid.net/auth/2.0",
-            "openid.claimed_id": "http://specs.openid.net/auth/2.0/identifier_select",
-            "openid.identity": "http://specs.openid.net/auth/2.0/identifier_select",
-            "openid.return_to": url,
-            "openid.realm": urllib.parse.urljoin(url, "/"),
-            "openid.mode": "checkid_setup",
-        }
-        if ax_attrs:
-            args.update(
-                {
-                    "openid.ns.ax": "http://openid.net/srv/ax/1.0",
-                    "openid.ax.mode": "fetch_request",
-                }
-            )
-            ax_attrs = set(ax_attrs)
-            required = []  # type: List[str]
-            if "name" in ax_attrs:
-                ax_attrs -= set(["name", "firstname", "fullname", "lastname"])
-                required += ["firstname", "fullname", "lastname"]
-                args.update(
-                    {
-                        "openid.ax.type.firstname": "http://axschema.org/namePerson/first",
-                        "openid.ax.type.fullname": "http://axschema.org/namePerson",
-                        "openid.ax.type.lastname": "http://axschema.org/namePerson/last",
-                    }
-                )
-            known_attrs = {
-                "email": "http://axschema.org/contact/email",
-                "language": "http://axschema.org/pref/language",
-                "username": "http://axschema.org/namePerson/friendly",
-            }
-            for name in ax_attrs:
-                args["openid.ax.type." + name] = known_attrs[name]
-                required.append(name)
-            args["openid.ax.required"] = ",".join(required)
-        if oauth_scope:
-            args.update(
-                {
-                    "openid.ns.oauth": "http://specs.openid.net/extensions/oauth/1.0",
-                    "openid.oauth.consumer": handler.request.host.split(":")[0],
-                    "openid.oauth.scope": oauth_scope,
-                }
-            )
-        return args
-
-    def _on_authentication_verified(
-        self, response: httpclient.HTTPResponse
-    ) -> Dict[str, Any]:
-        handler = cast(RequestHandler, self)
-        if b"is_valid:true" not in response.body:
-            raise AuthError("Invalid OpenID response: %s" % response.body)
-
-        # Make sure we got back at least an email from attribute exchange
-        ax_ns = None
-        for key in handler.request.arguments:
-            if (
-                key.startswith("openid.ns.")
-                and handler.get_argument(key) == u"http://openid.net/srv/ax/1.0"
-            ):
-                ax_ns = key[10:]
-                break
-
-        def get_ax_arg(uri: str) -> str:
-            if not ax_ns:
-                return u""
-            prefix = "openid." + ax_ns + ".type."
-            ax_name = None
-            for name in handler.request.arguments.keys():
-                if handler.get_argument(name) == uri and name.startswith(prefix):
-                    part = name[len(prefix) :]
-                    ax_name = "openid." + ax_ns + ".value." + part
-                    break
-            if not ax_name:
-                return u""
-            return handler.get_argument(ax_name, u"")
-
-        email = get_ax_arg("http://axschema.org/contact/email")
-        name = get_ax_arg("http://axschema.org/namePerson")
-        first_name = get_ax_arg("http://axschema.org/namePerson/first")
-        last_name = get_ax_arg("http://axschema.org/namePerson/last")
-        username = get_ax_arg("http://axschema.org/namePerson/friendly")
-        locale = get_ax_arg("http://axschema.org/pref/language").lower()
-        user = dict()
-        name_parts = []
-        if first_name:
-            user["first_name"] = first_name
-            name_parts.append(first_name)
-        if last_name:
-            user["last_name"] = last_name
-            name_parts.append(last_name)
-        if name:
-            user["name"] = name
-        elif name_parts:
-            user["name"] = u" ".join(name_parts)
-        elif email:
-            user["name"] = email.split("@")[0]
-        if email:
-            user["email"] = email
-        if locale:
-            user["locale"] = locale
-        if username:
-            user["username"] = username
-        claimed_id = handler.get_argument("openid.claimed_id", None)
-        if claimed_id:
-            user["claimed_id"] = claimed_id
-        return user
-
-    def get_auth_http_client(self) -> httpclient.AsyncHTTPClient:
-        """Returns the `.AsyncHTTPClient` instance to be used for auth requests.
-
-        May be overridden by subclasses to use an HTTP client other than
-        the default.
-        """
-        return httpclient.AsyncHTTPClient()
-
-
-class OAuthMixin(object):
-    """Abstract implementation of OAuth 1.0 and 1.0a.
-
-    See `TwitterMixin` below for an example implementation.
-
-    Class attributes:
-
-    * ``_OAUTH_AUTHORIZE_URL``: The service's OAuth authorization url.
-    * ``_OAUTH_ACCESS_TOKEN_URL``: The service's OAuth access token url.
-    * ``_OAUTH_VERSION``: May be either "1.0" or "1.0a".
-    * ``_OAUTH_NO_CALLBACKS``: Set this to True if the service requires
-      advance registration of callbacks.
-
-    Subclasses must also override the `_oauth_get_user_future` and
-    `_oauth_consumer_token` methods.
-    """
-
-    async def authorize_redirect(
-        self,
-        callback_uri: str = None,
-        extra_params: Dict[str, Any] = None,
-        http_client: httpclient.AsyncHTTPClient = None,
-    ) -> None:
-        """Redirects the user to obtain OAuth authorization for this service.
-
-        The ``callback_uri`` may be omitted if you have previously
-        registered a callback URI with the third-party service. For
-        some services, you must use a previously-registered callback
-        URI and cannot specify a callback via this method.
-
-        This method sets a cookie called ``_oauth_request_token`` which is
-        subsequently used (and cleared) in `get_authenticated_user` for
-        security purposes.
-
-        This method is asynchronous and must be called with ``await``
-        or ``yield`` (This is different from other ``auth*_redirect``
-        methods defined in this module). It calls
-        `.RequestHandler.finish` for you so you should not write any
-        other response after it returns.
-
-        .. versionchanged:: 3.1
-           Now returns a `.Future` and takes an optional callback, for
-           compatibility with `.gen.coroutine`.
-
-        .. versionchanged:: 6.0
-
-           The ``callback`` argument was removed. Use the returned
-           awaitable object instead.
-
-        """
-        if callback_uri and getattr(self, "_OAUTH_NO_CALLBACKS", False):
-            raise Exception("This service does not support oauth_callback")
-        if http_client is None:
-            http_client = self.get_auth_http_client()
-        assert http_client is not None
-        if getattr(self, "_OAUTH_VERSION", "1.0a") == "1.0a":
-            response = await http_client.fetch(
-                self._oauth_request_token_url(
-                    callback_uri=callback_uri, extra_params=extra_params
-                )
-            )
-        else:
-            response = await http_client.fetch(self._oauth_request_token_url())
-        url = self._OAUTH_AUTHORIZE_URL  # type: ignore
-        self._on_request_token(url, callback_uri, response)
-
-    async def get_authenticated_user(
-        self, http_client: httpclient.AsyncHTTPClient = None
-    ) -> Dict[str, Any]:
-        """Gets the OAuth authorized user and access token.
-
-        This method should be called from the handler for your
-        OAuth callback URL to complete the registration process. We run the
-        callback with the authenticated user dictionary.  This dictionary
-        will contain an ``access_key`` which can be used to make authorized
-        requests to this service on behalf of the user.  The dictionary will
-        also contain other fields such as ``name``, depending on the service
-        used.
-
-        .. versionchanged:: 6.0
-
-           The ``callback`` argument was removed. Use the returned
-           awaitable object instead.
-        """
-        handler = cast(RequestHandler, self)
-        request_key = escape.utf8(handler.get_argument("oauth_token"))
-        oauth_verifier = handler.get_argument("oauth_verifier", None)
-        request_cookie = handler.get_cookie("_oauth_request_token")
-        if not request_cookie:
-            raise AuthError("Missing OAuth request token cookie")
-        handler.clear_cookie("_oauth_request_token")
-        cookie_key, cookie_secret = [
-            base64.b64decode(escape.utf8(i)) for i in request_cookie.split("|")
-        ]
-        if cookie_key != request_key:
-            raise AuthError("Request token does not match cookie")
-        token = dict(
-            key=cookie_key, secret=cookie_secret
-        )  # type: Dict[str, Union[str, bytes]]
-        if oauth_verifier:
-            token["verifier"] = oauth_verifier
-        if http_client is None:
-            http_client = self.get_auth_http_client()
-        assert http_client is not None
-        response = await http_client.fetch(self._oauth_access_token_url(token))
-        access_token = _oauth_parse_response(response.body)
-        user = await self._oauth_get_user_future(access_token)
-        if not user:
-            raise AuthError("Error getting user")
-        user["access_token"] = access_token
-        return user
-
-    def _oauth_request_token_url(
-        self, callback_uri: str = None, extra_params: Dict[str, Any] = None
-    ) -> str:
-        handler = cast(RequestHandler, self)
-        consumer_token = self._oauth_consumer_token()
-        url = self._OAUTH_REQUEST_TOKEN_URL  # type: ignore
-        args = dict(
-            oauth_consumer_key=escape.to_basestring(consumer_token["key"]),
-            oauth_signature_method="HMAC-SHA1",
-            oauth_timestamp=str(int(time.time())),
-            oauth_nonce=escape.to_basestring(binascii.b2a_hex(uuid.uuid4().bytes)),
-            oauth_version="1.0",
-        )
-        if getattr(self, "_OAUTH_VERSION", "1.0a") == "1.0a":
-            if callback_uri == "oob":
-                args["oauth_callback"] = "oob"
-            elif callback_uri:
-                args["oauth_callback"] = urllib.parse.urljoin(
-                    handler.request.full_url(), callback_uri
-                )
-            if extra_params:
-                args.update(extra_params)
-            signature = _oauth10a_signature(consumer_token, "GET", url, args)
-        else:
-            signature = _oauth_signature(consumer_token, "GET", url, args)
-
-        args["oauth_signature"] = signature
-        return url + "?" + urllib.parse.urlencode(args)
-
-    def _on_request_token(
-        self,
-        authorize_url: str,
-        callback_uri: Optional[str],
-        response: httpclient.HTTPResponse,
-    ) -> None:
-        handler = cast(RequestHandler, self)
-        request_token = _oauth_parse_response(response.body)
-        data = (
-            base64.b64encode(escape.utf8(request_token["key"]))
-            + b"|"
-            + base64.b64encode(escape.utf8(request_token["secret"]))
-        )
-        handler.set_cookie("_oauth_request_token", data)
-        args = dict(oauth_token=request_token["key"])
-        if callback_uri == "oob":
-            handler.finish(authorize_url + "?" + urllib.parse.urlencode(args))
-            return
-        elif callback_uri:
-            args["oauth_callback"] = urllib.parse.urljoin(
-                handler.request.full_url(), callback_uri
-            )
-        handler.redirect(authorize_url + "?" + urllib.parse.urlencode(args))
-
-    def _oauth_access_token_url(self, request_token: Dict[str, Any]) -> str:
-        consumer_token = self._oauth_consumer_token()
-        url = self._OAUTH_ACCESS_TOKEN_URL  # type: ignore
-        args = dict(
-            oauth_consumer_key=escape.to_basestring(consumer_token["key"]),
-            oauth_token=escape.to_basestring(request_token["key"]),
-            oauth_signature_method="HMAC-SHA1",
-            oauth_timestamp=str(int(time.time())),
-            oauth_nonce=escape.to_basestring(binascii.b2a_hex(uuid.uuid4().bytes)),
-            oauth_version="1.0",
-        )
-        if "verifier" in request_token:
-            args["oauth_verifier"] = request_token["verifier"]
-
-        if getattr(self, "_OAUTH_VERSION", "1.0a") == "1.0a":
-            signature = _oauth10a_signature(
-                consumer_token, "GET", url, args, request_token
-            )
-        else:
-            signature = _oauth_signature(
-                consumer_token, "GET", url, args, request_token
-            )
-
-        args["oauth_signature"] = signature
-        return url + "?" + urllib.parse.urlencode(args)
-
-    def _oauth_consumer_token(self) -> Dict[str, Any]:
-        """Subclasses must override this to return their OAuth consumer keys.
-
-        The return value should be a `dict` with keys ``key`` and ``secret``.
-        """
-        raise NotImplementedError()
-
-    async def _oauth_get_user_future(
-        self, access_token: Dict[str, Any]
-    ) -> Dict[str, Any]:
-        """Subclasses must override this to get basic information about the
-        user.
-
-        Should be a coroutine whose result is a dictionary
-        containing information about the user, which may have been
-        retrieved by using ``access_token`` to make a request to the
-        service.
-
-        The access token will be added to the returned dictionary to make
-        the result of `get_authenticated_user`.
-
-        .. versionchanged:: 5.1
-
-           Subclasses may also define this method with ``async def``.
-
-        .. versionchanged:: 6.0
-
-           A synchronous fallback to ``_oauth_get_user`` was removed.
-        """
-        raise NotImplementedError()
-
-    def _oauth_request_parameters(
-        self,
-        url: str,
-        access_token: Dict[str, Any],
-        parameters: Dict[str, Any] = {},
-        method: str = "GET",
-    ) -> Dict[str, Any]:
-        """Returns the OAuth parameters as a dict for the given request.
-
-        parameters should include all POST arguments and query string arguments
-        that will be sent with the request.
-        """
-        consumer_token = self._oauth_consumer_token()
-        base_args = dict(
-            oauth_consumer_key=escape.to_basestring(consumer_token["key"]),
-            oauth_token=escape.to_basestring(access_token["key"]),
-            oauth_signature_method="HMAC-SHA1",
-            oauth_timestamp=str(int(time.time())),
-            oauth_nonce=escape.to_basestring(binascii.b2a_hex(uuid.uuid4().bytes)),
-            oauth_version="1.0",
-        )
-        args = {}
-        args.update(base_args)
-        args.update(parameters)
-        if getattr(self, "_OAUTH_VERSION", "1.0a") == "1.0a":
-            signature = _oauth10a_signature(
-                consumer_token, method, url, args, access_token
-            )
-        else:
-            signature = _oauth_signature(
-                consumer_token, method, url, args, access_token
-            )
-        base_args["oauth_signature"] = escape.to_basestring(signature)
-        return base_args
-
-    def get_auth_http_client(self) -> httpclient.AsyncHTTPClient:
-        """Returns the `.AsyncHTTPClient` instance to be used for auth requests.
-
-        May be overridden by subclasses to use an HTTP client other than
-        the default.
-        """
-        return httpclient.AsyncHTTPClient()
-
-
-class OAuth2Mixin(object):
-    """Abstract implementation of OAuth 2.0.
-
-    See `FacebookGraphMixin` or `GoogleOAuth2Mixin` below for example
-    implementations.
-
-    Class attributes:
-
-    * ``_OAUTH_AUTHORIZE_URL``: The service's authorization url.
-    * ``_OAUTH_ACCESS_TOKEN_URL``:  The service's access token url.
-    """
-
-    def authorize_redirect(
-        self,
-        redirect_uri: str = None,
-        client_id: str = None,
-        client_secret: str = None,
-        extra_params: Dict[str, Any] = None,
-        scope: str = None,
-        response_type: str = "code",
-    ) -> None:
-        """Redirects the user to obtain OAuth authorization for this service.
-
-        Some providers require that you register a redirect URL with
-        your application instead of passing one via this method. You
-        should call this method to log the user in, and then call
-        ``get_authenticated_user`` in the handler for your
-        redirect URL to complete the authorization process.
-
-        .. versionchanged:: 6.0
-
-           The ``callback`` argument and returned awaitable were removed;
-           this is now an ordinary synchronous function.
-        """
-        handler = cast(RequestHandler, self)
-        args = {"response_type": response_type}
-        if redirect_uri is not None:
-            args["redirect_uri"] = redirect_uri
-        if client_id is not None:
-            args["client_id"] = client_id
-        if extra_params:
-            args.update(extra_params)
-        if scope:
-            args["scope"] = " ".join(scope)
-        url = self._OAUTH_AUTHORIZE_URL  # type: ignore
-        handler.redirect(url_concat(url, args))
-
-    def _oauth_request_token_url(
-        self,
-        redirect_uri: str = None,
-        client_id: str = None,
-        client_secret: str = None,
-        code: str = None,
-        extra_params: Dict[str, Any] = None,
-    ) -> str:
-        url = self._OAUTH_ACCESS_TOKEN_URL  # type: ignore
-        args = {}  # type: Dict[str, str]
-        if redirect_uri is not None:
-            args["redirect_uri"] = redirect_uri
-        if code is not None:
-            args["code"] = code
-        if client_id is not None:
-            args["client_id"] = client_id
-        if client_secret is not None:
-            args["client_secret"] = client_secret
-        if extra_params:
-            args.update(extra_params)
-        return url_concat(url, args)
-
-    async def oauth2_request(
-        self,
-        url: str,
-        access_token: str = None,
-        post_args: Dict[str, Any] = None,
-        **args: Any
-    ) -> Any:
-        """Fetches the given URL auth an OAuth2 access token.
-
-        If the request is a POST, ``post_args`` should be provided. Query
-        string arguments should be given as keyword arguments.
-
-        Example usage:
-
-        ..testcode::
-
-            class MainHandler(tornado.web.RequestHandler,
-                              tornado.auth.FacebookGraphMixin):
-                @tornado.web.authenticated
-                async def get(self):
-                    new_entry = await self.oauth2_request(
-                        "https://graph.facebook.com/me/feed",
-                        post_args={"message": "I am posting from my Tornado application!"},
-                        access_token=self.current_user["access_token"])
-
-                    if not new_entry:
-                        # Call failed; perhaps missing permission?
-                        await self.authorize_redirect()
-                        return
-                    self.finish("Posted a message!")
-
-        .. testoutput::
-           :hide:
-
-        .. versionadded:: 4.3
-
-        .. versionchanged::: 6.0
-
-           The ``callback`` argument was removed. Use the returned awaitable object instead.
-        """
-        all_args = {}
-        if access_token:
-            all_args["access_token"] = access_token
-            all_args.update(args)
-
-        if all_args:
-            url += "?" + urllib.parse.urlencode(all_args)
-        http = self.get_auth_http_client()
-        if post_args is not None:
-            response = await http.fetch(
-                url, method="POST", body=urllib.parse.urlencode(post_args)
-            )
-        else:
-            response = await http.fetch(url)
-        return escape.json_decode(response.body)
-
-    def get_auth_http_client(self) -> httpclient.AsyncHTTPClient:
-        """Returns the `.AsyncHTTPClient` instance to be used for auth requests.
-
-        May be overridden by subclasses to use an HTTP client other than
-        the default.
-
-        .. versionadded:: 4.3
-        """
-        return httpclient.AsyncHTTPClient()
-
-
-class TwitterMixin(OAuthMixin):
-    """Twitter OAuth authentication.
-
-    To authenticate with Twitter, register your application with
-    Twitter at http://twitter.com/apps. Then copy your Consumer Key
-    and Consumer Secret to the application
-    `~tornado.web.Application.settings` ``twitter_consumer_key`` and
-    ``twitter_consumer_secret``. Use this mixin on the handler for the
-    URL you registered as your application's callback URL.
-
-    When your application is set up, you can use this mixin like this
-    to authenticate the user with Twitter and get access to their stream:
-
-    .. testcode::
-
-        class TwitterLoginHandler(tornado.web.RequestHandler,
-                                  tornado.auth.TwitterMixin):
-            async def get(self):
-                if self.get_argument("oauth_token", None):
-                    user = await self.get_authenticated_user()
-                    # Save the user using e.g. set_secure_cookie()
-                else:
-                    await self.authorize_redirect()
-
-    .. testoutput::
-       :hide:
-
-    The user object returned by `~OAuthMixin.get_authenticated_user`
-    includes the attributes ``username``, ``name``, ``access_token``,
-    and all of the custom Twitter user attributes described at
-    https://dev.twitter.com/docs/api/1.1/get/users/show
-    """
-
-    _OAUTH_REQUEST_TOKEN_URL = "https://api.twitter.com/oauth/request_token"
-    _OAUTH_ACCESS_TOKEN_URL = "https://api.twitter.com/oauth/access_token"
-    _OAUTH_AUTHORIZE_URL = "https://api.twitter.com/oauth/authorize"
-    _OAUTH_AUTHENTICATE_URL = "https://api.twitter.com/oauth/authenticate"
-    _OAUTH_NO_CALLBACKS = False
-    _TWITTER_BASE_URL = "https://api.twitter.com/1.1"
-
-    async def authenticate_redirect(self, callback_uri: str = None) -> None:
-        """Just like `~OAuthMixin.authorize_redirect`, but
-        auto-redirects if authorized.
-
-        This is generally the right interface to use if you are using
-        Twitter for single-sign on.
-
-        .. versionchanged:: 3.1
-           Now returns a `.Future` and takes an optional callback, for
-           compatibility with `.gen.coroutine`.
-
-        .. versionchanged:: 6.0
-
-           The ``callback`` argument was removed. Use the returned
-           awaitable object instead.
-        """
-        http = self.get_auth_http_client()
-        response = await http.fetch(
-            self._oauth_request_token_url(callback_uri=callback_uri)
-        )
-        self._on_request_token(self._OAUTH_AUTHENTICATE_URL, None, response)
-
-    async def twitter_request(
-        self,
-        path: str,
-        access_token: Dict[str, Any],
-        post_args: Dict[str, Any] = None,
-        **args: Any
-    ) -> Any:
-        """Fetches the given API path, e.g., ``statuses/user_timeline/btaylor``
-
-        The path should not include the format or API version number.
-        (we automatically use JSON format and API version 1).
-
-        If the request is a POST, ``post_args`` should be provided. Query
-        string arguments should be given as keyword arguments.
-
-        All the Twitter methods are documented at http://dev.twitter.com/
-
-        Many methods require an OAuth access token which you can
-        obtain through `~OAuthMixin.authorize_redirect` and
-        `~OAuthMixin.get_authenticated_user`. The user returned through that
-        process includes an 'access_token' attribute that can be used
-        to make authenticated requests via this method. Example
-        usage:
-
-        .. testcode::
-
-            class MainHandler(tornado.web.RequestHandler,
-                              tornado.auth.TwitterMixin):
-                @tornado.web.authenticated
-                async def get(self):
-                    new_entry = await self.twitter_request(
-                        "/statuses/update",
-                        post_args={"status": "Testing Tornado Web Server"},
-                        access_token=self.current_user["access_token"])
-                    if not new_entry:
-                        # Call failed; perhaps missing permission?
-                        yield self.authorize_redirect()
-                        return
-                    self.finish("Posted a message!")
-
-        .. testoutput::
-           :hide:
-
-        .. versionchanged:: 6.0
-
-           The ``callback`` argument was removed. Use the returned
-           awaitable object instead.
-        """
-        if path.startswith("http:") or path.startswith("https:"):
-            # Raw urls are useful for e.g. search which doesn't follow the
-            # usual pattern: http://search.twitter.com/search.json
-            url = path
-        else:
-            url = self._TWITTER_BASE_URL + path + ".json"
-        # Add the OAuth resource request signature if we have credentials
-        if access_token:
-            all_args = {}
-            all_args.update(args)
-            all_args.update(post_args or {})
-            method = "POST" if post_args is not None else "GET"
-            oauth = self._oauth_request_parameters(
-                url, access_token, all_args, method=method
-            )
-            args.update(oauth)
-        if args:
-            url += "?" + urllib.parse.urlencode(args)
-        http = self.get_auth_http_client()
-        if post_args is not None:
-            response = await http.fetch(
-                url, method="POST", body=urllib.parse.urlencode(post_args)
-            )
-        else:
-            response = await http.fetch(url)
-        return escape.json_decode(response.body)
-
-    def _oauth_consumer_token(self) -> Dict[str, Any]:
-        handler = cast(RequestHandler, self)
-        handler.require_setting("twitter_consumer_key", "Twitter OAuth")
-        handler.require_setting("twitter_consumer_secret", "Twitter OAuth")
-        return dict(
-            key=handler.settings["twitter_consumer_key"],
-            secret=handler.settings["twitter_consumer_secret"],
-        )
-
-    async def _oauth_get_user_future(
-        self, access_token: Dict[str, Any]
-    ) -> Dict[str, Any]:
-        user = await self.twitter_request(
-            "/account/verify_credentials", access_token=access_token
-        )
-        if user:
-            user["username"] = user["screen_name"]
-        return user
-
-
-class GoogleOAuth2Mixin(OAuth2Mixin):
-    """Google authentication using OAuth2.
-
-    In order to use, register your application with Google and copy the
-    relevant parameters to your application settings.
-
-    * Go to the Google Dev Console at http://console.developers.google.com
-    * Select a project, or create a new one.
-    * In the sidebar on the left, select APIs & Auth.
-    * In the list of APIs, find the Google+ API service and set it to ON.
-    * In the sidebar on the left, select Credentials.
-    * In the OAuth section of the page, select Create New Client ID.
-    * Set the Redirect URI to point to your auth handler
-    * Copy the "Client secret" and "Client ID" to the application settings as
-      ``{"google_oauth": {"key": CLIENT_ID, "secret": CLIENT_SECRET}}``
-
-    .. versionadded:: 3.2
-    """
-
-    _OAUTH_AUTHORIZE_URL = "https://accounts.google.com/o/oauth2/v2/auth"
-    _OAUTH_ACCESS_TOKEN_URL = "https://www.googleapis.com/oauth2/v4/token"
-    _OAUTH_USERINFO_URL = "https://www.googleapis.com/oauth2/v1/userinfo"
-    _OAUTH_NO_CALLBACKS = False
-    _OAUTH_SETTINGS_KEY = "google_oauth"
-
-    async def get_authenticated_user(
-        self, redirect_uri: str, code: str
-    ) -> Dict[str, Any]:
-        """Handles the login for the Google user, returning an access token.
-
-        The result is a dictionary containing an ``access_token`` field
-        ([among others](https://developers.google.com/identity/protocols/OAuth2WebServer#handlingtheresponse)).
-        Unlike other ``get_authenticated_user`` methods in this package,
-        this method does not return any additional information about the user.
-        The returned access token can be used with `OAuth2Mixin.oauth2_request`
-        to request additional information (perhaps from
-        ``https://www.googleapis.com/oauth2/v2/userinfo``)
-
-        Example usage:
-
-        .. testcode::
-
-            class GoogleOAuth2LoginHandler(tornado.web.RequestHandler,
-                                           tornado.auth.GoogleOAuth2Mixin):
-                async def get(self):
-                    if self.get_argument('code', False):
-                        access = await self.get_authenticated_user(
-                            redirect_uri='http://your.site.com/auth/google',
-                            code=self.get_argument('code'))
-                        user = await self.oauth2_request(
-                            "https://www.googleapis.com/oauth2/v1/userinfo",
-                            access_token=access["access_token"])
-                        # Save the user and access token with
-                        # e.g. set_secure_cookie.
-                    else:
-                        await self.authorize_redirect(
-                            redirect_uri='http://your.site.com/auth/google',
-                            client_id=self.settings['google_oauth']['key'],
-                            scope=['profile', 'email'],
-                            response_type='code',
-                            extra_params={'approval_prompt': 'auto'})
-
-        .. testoutput::
-           :hide:
-
-        .. versionchanged:: 6.0
-
-           The ``callback`` argument was removed. Use the returned awaitable object instead.
-        """  # noqa: E501
-        handler = cast(RequestHandler, self)
-        http = self.get_auth_http_client()
-        body = urllib.parse.urlencode(
-            {
-                "redirect_uri": redirect_uri,
-                "code": code,
-                "client_id": handler.settings[self._OAUTH_SETTINGS_KEY]["key"],
-                "client_secret": handler.settings[self._OAUTH_SETTINGS_KEY]["secret"],
-                "grant_type": "authorization_code",
-            }
-        )
-
-        response = await http.fetch(
-            self._OAUTH_ACCESS_TOKEN_URL,
-            method="POST",
-            headers={"Content-Type": "application/x-www-form-urlencoded"},
-            body=body,
-        )
-        return escape.json_decode(response.body)
-
-
-class FacebookGraphMixin(OAuth2Mixin):
-    """Facebook authentication using the new Graph API and OAuth2."""
-
-    _OAUTH_ACCESS_TOKEN_URL = "https://graph.facebook.com/oauth/access_token?"
-    _OAUTH_AUTHORIZE_URL = "https://www.facebook.com/dialog/oauth?"
-    _OAUTH_NO_CALLBACKS = False
-    _FACEBOOK_BASE_URL = "https://graph.facebook.com"
-
-    async def get_authenticated_user(
-        self,
-        redirect_uri: str,
-        client_id: str,
-        client_secret: str,
-        code: str,
-        extra_fields: Dict[str, Any] = None,
-    ) -> Optional[Dict[str, Any]]:
-        """Handles the login for the Facebook user, returning a user object.
-
-        Example usage:
-
-        .. testcode::
-
-            class FacebookGraphLoginHandler(tornado.web.RequestHandler,
-                                            tornado.auth.FacebookGraphMixin):
-              async def get(self):
-                  if self.get_argument("code", False):
-                      user = await self.get_authenticated_user(
-                          redirect_uri='/auth/facebookgraph/',
-                          client_id=self.settings["facebook_api_key"],
-                          client_secret=self.settings["facebook_secret"],
-                          code=self.get_argument("code"))
-                      # Save the user with e.g. set_secure_cookie
-                  else:
-                      await self.authorize_redirect(
-                          redirect_uri='/auth/facebookgraph/',
-                          client_id=self.settings["facebook_api_key"],
-                          extra_params={"scope": "read_stream,offline_access"})
-
-        .. testoutput::
-           :hide:
-
-        This method returns a dictionary which may contain the following fields:
-
-        * ``access_token``, a string which may be passed to `facebook_request`
-        * ``session_expires``, an integer encoded as a string representing
-          the time until the access token expires in seconds. This field should
-          be used like ``int(user['session_expires'])``; in a future version of
-          Tornado it will change from a string to an integer.
-        * ``id``, ``name``, ``first_name``, ``last_name``, ``locale``, ``picture``,
-          ``link``, plus any fields named in the ``extra_fields`` argument. These
-          fields are copied from the Facebook graph API
-          `user object <https://developers.facebook.com/docs/graph-api/reference/user>`_
-
-        .. versionchanged:: 4.5
-           The ``session_expires`` field was updated to support changes made to the
-           Facebook API in March 2017.
-
-        .. versionchanged:: 6.0
-
-           The ``callback`` argument was removed. Use the returned awaitable object instead.
-        """
-        http = self.get_auth_http_client()
-        args = {
-            "redirect_uri": redirect_uri,
-            "code": code,
-            "client_id": client_id,
-            "client_secret": client_secret,
-        }
-
-        fields = set(
-            ["id", "name", "first_name", "last_name", "locale", "picture", "link"]
-        )
-        if extra_fields:
-            fields.update(extra_fields)
-
-        response = await http.fetch(
-            self._oauth_request_token_url(**args)  # type: ignore
-        )
-        args = escape.json_decode(response.body)
-        session = {
-            "access_token": args.get("access_token"),
-            "expires_in": args.get("expires_in"),
-        }
-        assert session["access_token"] is not None
-
-        user = await self.facebook_request(
-            path="/me",
-            access_token=session["access_token"],
-            appsecret_proof=hmac.new(
-                key=client_secret.encode("utf8"),
-                msg=session["access_token"].encode("utf8"),
-                digestmod=hashlib.sha256,
-            ).hexdigest(),
-            fields=",".join(fields),
-        )
-
-        if user is None:
-            return None
-
-        fieldmap = {}
-        for field in fields:
-            fieldmap[field] = user.get(field)
-
-        # session_expires is converted to str for compatibility with
-        # older versions in which the server used url-encoding and
-        # this code simply returned the string verbatim.
-        # This should change in Tornado 5.0.
-        fieldmap.update(
-            {
-                "access_token": session["access_token"],
-                "session_expires": str(session.get("expires_in")),
-            }
-        )
-        return fieldmap
-
-    async def facebook_request(
-        self,
-        path: str,
-        access_token: str = None,
-        post_args: Dict[str, Any] = None,
-        **args: Any
-    ) -> Any:
-        """Fetches the given relative API path, e.g., "/btaylor/picture"
-
-        If the request is a POST, ``post_args`` should be provided. Query
-        string arguments should be given as keyword arguments.
-
-        An introduction to the Facebook Graph API can be found at
-        http://developers.facebook.com/docs/api
-
-        Many methods require an OAuth access token which you can
-        obtain through `~OAuth2Mixin.authorize_redirect` and
-        `get_authenticated_user`. The user returned through that
-        process includes an ``access_token`` attribute that can be
-        used to make authenticated requests via this method.
-
-        Example usage:
-
-        .. testcode::
-
-            class MainHandler(tornado.web.RequestHandler,
-                              tornado.auth.FacebookGraphMixin):
-                @tornado.web.authenticated
-                async def get(self):
-                    new_entry = await self.facebook_request(
-                        "/me/feed",
-                        post_args={"message": "I am posting from my Tornado application!"},
-                        access_token=self.current_user["access_token"])
-
-                    if not new_entry:
-                        # Call failed; perhaps missing permission?
-                        yield self.authorize_redirect()
-                        return
-                    self.finish("Posted a message!")
-
-        .. testoutput::
-           :hide:
-
-        The given path is relative to ``self._FACEBOOK_BASE_URL``,
-        by default "https://graph.facebook.com".
-
-        This method is a wrapper around `OAuth2Mixin.oauth2_request`;
-        the only difference is that this method takes a relative path,
-        while ``oauth2_request`` takes a complete url.
-
-        .. versionchanged:: 3.1
-           Added the ability to override ``self._FACEBOOK_BASE_URL``.
-
-        .. versionchanged:: 6.0
-
-           The ``callback`` argument was removed. Use the returned awaitable object instead.
-        """
-        url = self._FACEBOOK_BASE_URL + path
-        return await self.oauth2_request(
-            url, access_token=access_token, post_args=post_args, **args
-        )
-
-
-def _oauth_signature(
-    consumer_token: Dict[str, Any],
-    method: str,
-    url: str,
-    parameters: Dict[str, Any] = {},
-    token: Dict[str, Any] = None,
-) -> bytes:
-    """Calculates the HMAC-SHA1 OAuth signature for the given request.
-
-    See http://oauth.net/core/1.0/#signing_process
-    """
-    parts = urllib.parse.urlparse(url)
-    scheme, netloc, path = parts[:3]
-    normalized_url = scheme.lower() + "://" + netloc.lower() + path
-
-    base_elems = []
-    base_elems.append(method.upper())
-    base_elems.append(normalized_url)
-    base_elems.append(
-        "&".join(
-            "%s=%s" % (k, _oauth_escape(str(v))) for k, v in sorted(parameters.items())
-        )
-    )
-    base_string = "&".join(_oauth_escape(e) for e in base_elems)
-
-    key_elems = [escape.utf8(consumer_token["secret"])]
-    key_elems.append(escape.utf8(token["secret"] if token else ""))
-    key = b"&".join(key_elems)
-
-    hash = hmac.new(key, escape.utf8(base_string), hashlib.sha1)
-    return binascii.b2a_base64(hash.digest())[:-1]
-
-
-def _oauth10a_signature(
-    consumer_token: Dict[str, Any],
-    method: str,
-    url: str,
-    parameters: Dict[str, Any] = {},
-    token: Dict[str, Any] = None,
-) -> bytes:
-    """Calculates the HMAC-SHA1 OAuth 1.0a signature for the given request.
-
-    See http://oauth.net/core/1.0a/#signing_process
-    """
-    parts = urllib.parse.urlparse(url)
-    scheme, netloc, path = parts[:3]
-    normalized_url = scheme.lower() + "://" + netloc.lower() + path
-
-    base_elems = []
-    base_elems.append(method.upper())
-    base_elems.append(normalized_url)
-    base_elems.append(
-        "&".join(
-            "%s=%s" % (k, _oauth_escape(str(v))) for k, v in sorted(parameters.items())
-        )
-    )
-
-    base_string = "&".join(_oauth_escape(e) for e in base_elems)
-    key_elems = [escape.utf8(urllib.parse.quote(consumer_token["secret"], safe="~"))]
-    key_elems.append(
-        escape.utf8(urllib.parse.quote(token["secret"], safe="~") if token else "")
-    )
-    key = b"&".join(key_elems)
-
-    hash = hmac.new(key, escape.utf8(base_string), hashlib.sha1)
-    return binascii.b2a_base64(hash.digest())[:-1]
-
-
-def _oauth_escape(val: Union[str, bytes]) -> str:
-    if isinstance(val, unicode_type):
-        val = val.encode("utf-8")
-    return urllib.parse.quote(val, safe="~")
-
-
-def _oauth_parse_response(body: bytes) -> Dict[str, Any]:
-    # I can't find an officially-defined encoding for oauth responses and
-    # have never seen anyone use non-ascii.  Leave the response in a byte
-    # string for python 2, and use utf8 on python 3.
-    body_str = escape.native_str(body)
-    p = urllib.parse.parse_qs(body_str, keep_blank_values=False)
-    token = dict(key=p["oauth_token"][0], secret=p["oauth_token_secret"][0])
-
-    # Add the extra parameters the Provider included to the token
-    special = ("oauth_token", "oauth_token_secret")
-    token.update((k, p[k][0]) for k in p if k not in special)
-    return token
diff --git a/venv/lib/python3.7/site-packages/tornado/autoreload.py b/venv/lib/python3.7/site-packages/tornado/autoreload.py
deleted file mode 100644
index 1c47aae..0000000
--- a/venv/lib/python3.7/site-packages/tornado/autoreload.py
+++ /dev/null
@@ -1,364 +0,0 @@
-#
-# Copyright 2009 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-"""Automatically restart the server when a source file is modified.
-
-Most applications should not access this module directly.  Instead,
-pass the keyword argument ``autoreload=True`` to the
-`tornado.web.Application` constructor (or ``debug=True``, which
-enables this setting and several others).  This will enable autoreload
-mode as well as checking for changes to templates and static
-resources.  Note that restarting is a destructive operation and any
-requests in progress will be aborted when the process restarts.  (If
-you want to disable autoreload while using other debug-mode features,
-pass both ``debug=True`` and ``autoreload=False``).
-
-This module can also be used as a command-line wrapper around scripts
-such as unit test runners.  See the `main` method for details.
-
-The command-line wrapper and Application debug modes can be used together.
-This combination is encouraged as the wrapper catches syntax errors and
-other import-time failures, while debug mode catches changes once
-the server has started.
-
-This module will not work correctly when `.HTTPServer`'s multi-process
-mode is used.
-
-Reloading loses any Python interpreter command-line arguments (e.g. ``-u``)
-because it re-executes Python using ``sys.executable`` and ``sys.argv``.
-Additionally, modifying these variables will cause reloading to behave
-incorrectly.
-
-"""
-
-import os
-import sys
-
-# sys.path handling
-# -----------------
-#
-# If a module is run with "python -m", the current directory (i.e. "")
-# is automatically prepended to sys.path, but not if it is run as
-# "path/to/file.py".  The processing for "-m" rewrites the former to
-# the latter, so subsequent executions won't have the same path as the
-# original.
-#
-# Conversely, when run as path/to/file.py, the directory containing
-# file.py gets added to the path, which can cause confusion as imports
-# may become relative in spite of the future import.
-#
-# We address the former problem by reconstructing the original command
-# line (Python >= 3.4) or by setting the $PYTHONPATH environment
-# variable (Python < 3.4) before re-execution so the new process will
-# see the correct path.  We attempt to address the latter problem when
-# tornado.autoreload is run as __main__.
-
-if __name__ == "__main__":
-    # This sys.path manipulation must come before our imports (as much
-    # as possible - if we introduced a tornado.sys or tornado.os
-    # module we'd be in trouble), or else our imports would become
-    # relative again despite the future import.
-    #
-    # There is a separate __main__ block at the end of the file to call main().
-    if sys.path[0] == os.path.dirname(__file__):
-        del sys.path[0]
-
-import functools
-import logging
-import os
-import pkgutil  # type: ignore
-import sys
-import traceback
-import types
-import subprocess
-import weakref
-
-from tornado import ioloop
-from tornado.log import gen_log
-from tornado import process
-from tornado.util import exec_in
-
-try:
-    import signal
-except ImportError:
-    signal = None  # type: ignore
-
-import typing
-from typing import Callable, Dict
-
-if typing.TYPE_CHECKING:
-    from typing import List, Optional, Union  # noqa: F401
-
-# os.execv is broken on Windows and can't properly parse command line
-# arguments and executable name if they contain whitespaces. subprocess
-# fixes that behavior.
-_has_execv = sys.platform != "win32"
-
-_watched_files = set()
-_reload_hooks = []
-_reload_attempted = False
-_io_loops = weakref.WeakKeyDictionary()  # type: ignore
-_autoreload_is_main = False
-_original_argv = None  # type: Optional[List[str]]
-_original_spec = None
-
-
-def start(check_time: int = 500) -> None:
-    """Begins watching source files for changes.
-
-    .. versionchanged:: 5.0
-       The ``io_loop`` argument (deprecated since version 4.1) has been removed.
-    """
-    io_loop = ioloop.IOLoop.current()
-    if io_loop in _io_loops:
-        return
-    _io_loops[io_loop] = True
-    if len(_io_loops) > 1:
-        gen_log.warning("tornado.autoreload started more than once in the same process")
-    modify_times = {}  # type: Dict[str, float]
-    callback = functools.partial(_reload_on_update, modify_times)
-    scheduler = ioloop.PeriodicCallback(callback, check_time)
-    scheduler.start()
-
-
-def wait() -> None:
-    """Wait for a watched file to change, then restart the process.
-
-    Intended to be used at the end of scripts like unit test runners,
-    to run the tests again after any source file changes (but see also
-    the command-line interface in `main`)
-    """
-    io_loop = ioloop.IOLoop()
-    io_loop.add_callback(start)
-    io_loop.start()
-
-
-def watch(filename: str) -> None:
-    """Add a file to the watch list.
-
-    All imported modules are watched by default.
-    """
-    _watched_files.add(filename)
-
-
-def add_reload_hook(fn: Callable[[], None]) -> None:
-    """Add a function to be called before reloading the process.
-
-    Note that for open file and socket handles it is generally
-    preferable to set the ``FD_CLOEXEC`` flag (using `fcntl` or
-    ``tornado.platform.auto.set_close_exec``) instead
-    of using a reload hook to close them.
-    """
-    _reload_hooks.append(fn)
-
-
-def _reload_on_update(modify_times: Dict[str, float]) -> None:
-    if _reload_attempted:
-        # We already tried to reload and it didn't work, so don't try again.
-        return
-    if process.task_id() is not None:
-        # We're in a child process created by fork_processes.  If child
-        # processes restarted themselves, they'd all restart and then
-        # all call fork_processes again.
-        return
-    for module in list(sys.modules.values()):
-        # Some modules play games with sys.modules (e.g. email/__init__.py
-        # in the standard library), and occasionally this can cause strange
-        # failures in getattr.  Just ignore anything that's not an ordinary
-        # module.
-        if not isinstance(module, types.ModuleType):
-            continue
-        path = getattr(module, "__file__", None)
-        if not path:
-            continue
-        if path.endswith(".pyc") or path.endswith(".pyo"):
-            path = path[:-1]
-        _check_file(modify_times, path)
-    for path in _watched_files:
-        _check_file(modify_times, path)
-
-
-def _check_file(modify_times: Dict[str, float], path: str) -> None:
-    try:
-        modified = os.stat(path).st_mtime
-    except Exception:
-        return
-    if path not in modify_times:
-        modify_times[path] = modified
-        return
-    if modify_times[path] != modified:
-        gen_log.info("%s modified; restarting server", path)
-        _reload()
-
-
-def _reload() -> None:
-    global _reload_attempted
-    _reload_attempted = True
-    for fn in _reload_hooks:
-        fn()
-    if hasattr(signal, "setitimer"):
-        # Clear the alarm signal set by
-        # ioloop.set_blocking_log_threshold so it doesn't fire
-        # after the exec.
-        signal.setitimer(signal.ITIMER_REAL, 0, 0)
-    # sys.path fixes: see comments at top of file.  If __main__.__spec__
-    # exists, we were invoked with -m and the effective path is about to
-    # change on re-exec.  Reconstruct the original command line to
-    # ensure that the new process sees the same path we did.  If
-    # __spec__ is not available (Python < 3.4), check instead if
-    # sys.path[0] is an empty string and add the current directory to
-    # $PYTHONPATH.
-    if _autoreload_is_main:
-        assert _original_argv is not None
-        spec = _original_spec
-        argv = _original_argv
-    else:
-        spec = getattr(sys.modules["__main__"], "__spec__", None)
-        argv = sys.argv
-    if spec:
-        argv = ["-m", spec.name] + argv[1:]
-    else:
-        path_prefix = "." + os.pathsep
-        if sys.path[0] == "" and not os.environ.get("PYTHONPATH", "").startswith(
-            path_prefix
-        ):
-            os.environ["PYTHONPATH"] = path_prefix + os.environ.get("PYTHONPATH", "")
-    if not _has_execv:
-        subprocess.Popen([sys.executable] + argv)
-        os._exit(0)
-    else:
-        try:
-            os.execv(sys.executable, [sys.executable] + argv)
-        except OSError:
-            # Mac OS X versions prior to 10.6 do not support execv in
-            # a process that contains multiple threads.  Instead of
-            # re-executing in the current process, start a new one
-            # and cause the current process to exit.  This isn't
-            # ideal since the new process is detached from the parent
-            # terminal and thus cannot easily be killed with ctrl-C,
-            # but it's better than not being able to autoreload at
-            # all.
-            # Unfortunately the errno returned in this case does not
-            # appear to be consistent, so we can't easily check for
-            # this error specifically.
-            os.spawnv(  # type: ignore
-                os.P_NOWAIT, sys.executable, [sys.executable] + argv
-            )
-            # At this point the IOLoop has been closed and finally
-            # blocks will experience errors if we allow the stack to
-            # unwind, so just exit uncleanly.
-            os._exit(0)
-
-
-_USAGE = """\
-Usage:
-  python -m tornado.autoreload -m module.to.run [args...]
-  python -m tornado.autoreload path/to/script.py [args...]
-"""
-
-
-def main() -> None:
-    """Command-line wrapper to re-run a script whenever its source changes.
-
-    Scripts may be specified by filename or module name::
-
-        python -m tornado.autoreload -m tornado.test.runtests
-        python -m tornado.autoreload tornado/test/runtests.py
-
-    Running a script with this wrapper is similar to calling
-    `tornado.autoreload.wait` at the end of the script, but this wrapper
-    can catch import-time problems like syntax errors that would otherwise
-    prevent the script from reaching its call to `wait`.
-    """
-    # Remember that we were launched with autoreload as main.
-    # The main module can be tricky; set the variables both in our globals
-    # (which may be __main__) and the real importable version.
-    import tornado.autoreload
-
-    global _autoreload_is_main
-    global _original_argv, _original_spec
-    tornado.autoreload._autoreload_is_main = _autoreload_is_main = True
-    original_argv = sys.argv
-    tornado.autoreload._original_argv = _original_argv = original_argv
-    original_spec = getattr(sys.modules["__main__"], "__spec__", None)
-    tornado.autoreload._original_spec = _original_spec = original_spec
-    sys.argv = sys.argv[:]
-    if len(sys.argv) >= 3 and sys.argv[1] == "-m":
-        mode = "module"
-        module = sys.argv[2]
-        del sys.argv[1:3]
-    elif len(sys.argv) >= 2:
-        mode = "script"
-        script = sys.argv[1]
-        sys.argv = sys.argv[1:]
-    else:
-        print(_USAGE, file=sys.stderr)
-        sys.exit(1)
-
-    try:
-        if mode == "module":
-            import runpy
-
-            runpy.run_module(module, run_name="__main__", alter_sys=True)
-        elif mode == "script":
-            with open(script) as f:
-                # Execute the script in our namespace instead of creating
-                # a new one so that something that tries to import __main__
-                # (e.g. the unittest module) will see names defined in the
-                # script instead of just those defined in this module.
-                global __file__
-                __file__ = script
-                # If __package__ is defined, imports may be incorrectly
-                # interpreted as relative to this module.
-                global __package__
-                del __package__
-                exec_in(f.read(), globals(), globals())
-    except SystemExit as e:
-        logging.basicConfig()
-        gen_log.info("Script exited with status %s", e.code)
-    except Exception as e:
-        logging.basicConfig()
-        gen_log.warning("Script exited with uncaught exception", exc_info=True)
-        # If an exception occurred at import time, the file with the error
-        # never made it into sys.modules and so we won't know to watch it.
-        # Just to make sure we've covered everything, walk the stack trace
-        # from the exception and watch every file.
-        for (filename, lineno, name, line) in traceback.extract_tb(sys.exc_info()[2]):
-            watch(filename)
-        if isinstance(e, SyntaxError):
-            # SyntaxErrors are special:  their innermost stack frame is fake
-            # so extract_tb won't see it and we have to get the filename
-            # from the exception object.
-            watch(e.filename)
-    else:
-        logging.basicConfig()
-        gen_log.info("Script exited normally")
-    # restore sys.argv so subsequent executions will include autoreload
-    sys.argv = original_argv
-
-    if mode == "module":
-        # runpy did a fake import of the module as __main__, but now it's
-        # no longer in sys.modules.  Figure out where it is and watch it.
-        loader = pkgutil.get_loader(module)
-        if loader is not None:
-            watch(loader.get_filename())  # type: ignore
-
-    wait()
-
-
-if __name__ == "__main__":
-    # See also the other __main__ block at the top of the file, which modifies
-    # sys.path before our imports
-    main()
diff --git a/venv/lib/python3.7/site-packages/tornado/concurrent.py b/venv/lib/python3.7/site-packages/tornado/concurrent.py
deleted file mode 100644
index 3a49940..0000000
--- a/venv/lib/python3.7/site-packages/tornado/concurrent.py
+++ /dev/null
@@ -1,264 +0,0 @@
-#
-# Copyright 2012 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-"""Utilities for working with ``Future`` objects.
-
-Tornado previously provided its own ``Future`` class, but now uses
-`asyncio.Future`. This module contains utility functions for working
-with `asyncio.Future` in a way that is backwards-compatible with
-Tornado's old ``Future`` implementation.
-
-While this module is an important part of Tornado's internal
-implementation, applications rarely need to interact with it
-directly.
-
-"""
-
-import asyncio
-from concurrent import futures
-import functools
-import sys
-import types
-
-from tornado.log import app_log
-
-import typing
-from typing import Any, Callable, Optional, Tuple, Union
-
-_T = typing.TypeVar("_T")
-
-
-class ReturnValueIgnoredError(Exception):
-    # No longer used; was previously used by @return_future
-    pass
-
-
-Future = asyncio.Future
-
-FUTURES = (futures.Future, Future)
-
-
-def is_future(x: Any) -> bool:
-    return isinstance(x, FUTURES)
-
-
-class DummyExecutor(futures.Executor):
-    def submit(
-        self, fn: Callable[..., _T], *args: Any, **kwargs: Any
-    ) -> "futures.Future[_T]":
-        future = futures.Future()  # type: futures.Future[_T]
-        try:
-            future_set_result_unless_cancelled(future, fn(*args, **kwargs))
-        except Exception:
-            future_set_exc_info(future, sys.exc_info())
-        return future
-
-    def shutdown(self, wait: bool = True) -> None:
-        pass
-
-
-dummy_executor = DummyExecutor()
-
-
-def run_on_executor(*args: Any, **kwargs: Any) -> Callable:
-    """Decorator to run a synchronous method asynchronously on an executor.
-
-    The decorated method may be called with a ``callback`` keyword
-    argument and returns a future.
-
-    The executor to be used is determined by the ``executor``
-    attributes of ``self``. To use a different attribute name, pass a
-    keyword argument to the decorator::
-
-        @run_on_executor(executor='_thread_pool')
-        def foo(self):
-            pass
-
-    This decorator should not be confused with the similarly-named
-    `.IOLoop.run_in_executor`. In general, using ``run_in_executor``
-    when *calling* a blocking method is recommended instead of using
-    this decorator when *defining* a method. If compatibility with older
-    versions of Tornado is required, consider defining an executor
-    and using ``executor.submit()`` at the call site.
-
-    .. versionchanged:: 4.2
-       Added keyword arguments to use alternative attributes.
-
-    .. versionchanged:: 5.0
-       Always uses the current IOLoop instead of ``self.io_loop``.
-
-    .. versionchanged:: 5.1
-       Returns a `.Future` compatible with ``await`` instead of a
-       `concurrent.futures.Future`.
-
-    .. deprecated:: 5.1
-
-       The ``callback`` argument is deprecated and will be removed in
-       6.0. The decorator itself is discouraged in new code but will
-       not be removed in 6.0.
-
-    .. versionchanged:: 6.0
-
-       The ``callback`` argument was removed.
-    """
-    # Fully type-checking decorators is tricky, and this one is
-    # discouraged anyway so it doesn't have all the generic magic.
-    def run_on_executor_decorator(fn: Callable) -> Callable[..., Future]:
-        executor = kwargs.get("executor", "executor")
-
-        @functools.wraps(fn)
-        def wrapper(self: Any, *args: Any, **kwargs: Any) -> Future:
-            async_future = Future()  # type: Future
-            conc_future = getattr(self, executor).submit(fn, self, *args, **kwargs)
-            chain_future(conc_future, async_future)
-            return async_future
-
-        return wrapper
-
-    if args and kwargs:
-        raise ValueError("cannot combine positional and keyword args")
-    if len(args) == 1:
-        return run_on_executor_decorator(args[0])
-    elif len(args) != 0:
-        raise ValueError("expected 1 argument, got %d", len(args))
-    return run_on_executor_decorator
-
-
-_NO_RESULT = object()
-
-
-def chain_future(a: "Future[_T]", b: "Future[_T]") -> None:
-    """Chain two futures together so that when one completes, so does the other.
-
-    The result (success or failure) of ``a`` will be copied to ``b``, unless
-    ``b`` has already been completed or cancelled by the time ``a`` finishes.
-
-    .. versionchanged:: 5.0
-
-       Now accepts both Tornado/asyncio `Future` objects and
-       `concurrent.futures.Future`.
-
-    """
-
-    def copy(future: "Future[_T]") -> None:
-        assert future is a
-        if b.done():
-            return
-        if hasattr(a, "exc_info") and a.exc_info() is not None:  # type: ignore
-            future_set_exc_info(b, a.exc_info())  # type: ignore
-        elif a.exception() is not None:
-            b.set_exception(a.exception())
-        else:
-            b.set_result(a.result())
-
-    if isinstance(a, Future):
-        future_add_done_callback(a, copy)
-    else:
-        # concurrent.futures.Future
-        from tornado.ioloop import IOLoop
-
-        IOLoop.current().add_future(a, copy)
-
-
-def future_set_result_unless_cancelled(
-    future: "Union[futures.Future[_T], Future[_T]]", value: _T
-) -> None:
-    """Set the given ``value`` as the `Future`'s result, if not cancelled.
-
-    Avoids ``asyncio.InvalidStateError`` when calling ``set_result()`` on
-    a cancelled `asyncio.Future`.
-
-    .. versionadded:: 5.0
-    """
-    if not future.cancelled():
-        future.set_result(value)
-
-
-def future_set_exception_unless_cancelled(
-    future: "Union[futures.Future[_T], Future[_T]]", exc: BaseException
-) -> None:
-    """Set the given ``exc`` as the `Future`'s exception.
-
-    If the Future is already canceled, logs the exception instead. If
-    this logging is not desired, the caller should explicitly check
-    the state of the Future and call ``Future.set_exception`` instead of
-    this wrapper.
-
-    Avoids ``asyncio.InvalidStateError`` when calling ``set_exception()`` on
-    a cancelled `asyncio.Future`.
-
-    .. versionadded:: 6.0
-
-    """
-    if not future.cancelled():
-        future.set_exception(exc)
-    else:
-        app_log.error("Exception after Future was cancelled", exc_info=exc)
-
-
-def future_set_exc_info(
-    future: "Union[futures.Future[_T], Future[_T]]",
-    exc_info: Tuple[
-        Optional[type], Optional[BaseException], Optional[types.TracebackType]
-    ],
-) -> None:
-    """Set the given ``exc_info`` as the `Future`'s exception.
-
-    Understands both `asyncio.Future` and the extensions in older
-    versions of Tornado to enable better tracebacks on Python 2.
-
-    .. versionadded:: 5.0
-
-    .. versionchanged:: 6.0
-
-       If the future is already cancelled, this function is a no-op.
-       (previously ``asyncio.InvalidStateError`` would be raised)
-
-    """
-    if exc_info[1] is None:
-        raise Exception("future_set_exc_info called with no exception")
-    future_set_exception_unless_cancelled(future, exc_info[1])
-
-
-@typing.overload
-def future_add_done_callback(
-    future: "futures.Future[_T]", callback: Callable[["futures.Future[_T]"], None]
-) -> None:
-    pass
-
-
-@typing.overload  # noqa: F811
-def future_add_done_callback(
-    future: "Future[_T]", callback: Callable[["Future[_T]"], None]
-) -> None:
-    pass
-
-
-def future_add_done_callback(  # noqa: F811
-    future: "Union[futures.Future[_T], Future[_T]]", callback: Callable[..., None]
-) -> None:
-    """Arrange to call ``callback`` when ``future`` is complete.
-
-    ``callback`` is invoked with one argument, the ``future``.
-
-    If ``future`` is already done, ``callback`` is invoked immediately.
-    This may differ from the behavior of ``Future.add_done_callback``,
-    which makes no such guarantee.
-
-    .. versionadded:: 5.0
-    """
-    if future.done():
-        callback(future)
-    else:
-        future.add_done_callback(callback)
diff --git a/venv/lib/python3.7/site-packages/tornado/curl_httpclient.py b/venv/lib/python3.7/site-packages/tornado/curl_httpclient.py
deleted file mode 100644
index 4119585..0000000
--- a/venv/lib/python3.7/site-packages/tornado/curl_httpclient.py
+++ /dev/null
@@ -1,572 +0,0 @@
-#
-# Copyright 2009 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-"""Non-blocking HTTP client implementation using pycurl."""
-
-import collections
-import functools
-import logging
-import pycurl  # type: ignore
-import threading
-import time
-from io import BytesIO
-
-from tornado import httputil
-from tornado import ioloop
-
-from tornado.escape import utf8, native_str
-from tornado.httpclient import (
-    HTTPRequest,
-    HTTPResponse,
-    HTTPError,
-    AsyncHTTPClient,
-    main,
-)
-from tornado.log import app_log
-
-from typing import Dict, Any, Callable, Union
-import typing
-
-if typing.TYPE_CHECKING:
-    from typing import Deque, Tuple, Optional  # noqa: F401
-
-curl_log = logging.getLogger("tornado.curl_httpclient")
-
-
-class CurlAsyncHTTPClient(AsyncHTTPClient):
-    def initialize(  # type: ignore
-        self, max_clients: int = 10, defaults: Dict[str, Any] = None
-    ) -> None:
-        super(CurlAsyncHTTPClient, self).initialize(defaults=defaults)
-        self._multi = pycurl.CurlMulti()
-        self._multi.setopt(pycurl.M_TIMERFUNCTION, self._set_timeout)
-        self._multi.setopt(pycurl.M_SOCKETFUNCTION, self._handle_socket)
-        self._curls = [self._curl_create() for i in range(max_clients)]
-        self._free_list = self._curls[:]
-        self._requests = (
-            collections.deque()
-        )  # type: Deque[Tuple[HTTPRequest, Callable[[HTTPResponse], None], float]]
-        self._fds = {}  # type: Dict[int, int]
-        self._timeout = None  # type: Optional[object]
-
-        # libcurl has bugs that sometimes cause it to not report all
-        # relevant file descriptors and timeouts to TIMERFUNCTION/
-        # SOCKETFUNCTION.  Mitigate the effects of such bugs by
-        # forcing a periodic scan of all active requests.
-        self._force_timeout_callback = ioloop.PeriodicCallback(
-            self._handle_force_timeout, 1000
-        )
-        self._force_timeout_callback.start()
-
-        # Work around a bug in libcurl 7.29.0: Some fields in the curl
-        # multi object are initialized lazily, and its destructor will
-        # segfault if it is destroyed without having been used.  Add
-        # and remove a dummy handle to make sure everything is
-        # initialized.
-        dummy_curl_handle = pycurl.Curl()
-        self._multi.add_handle(dummy_curl_handle)
-        self._multi.remove_handle(dummy_curl_handle)
-
-    def close(self) -> None:
-        self._force_timeout_callback.stop()
-        if self._timeout is not None:
-            self.io_loop.remove_timeout(self._timeout)
-        for curl in self._curls:
-            curl.close()
-        self._multi.close()
-        super(CurlAsyncHTTPClient, self).close()
-
-        # Set below properties to None to reduce the reference count of current
-        # instance, because those properties hold some methods of current
-        # instance that will case circular reference.
-        self._force_timeout_callback = None  # type: ignore
-        self._multi = None
-
-    def fetch_impl(
-        self, request: HTTPRequest, callback: Callable[[HTTPResponse], None]
-    ) -> None:
-        self._requests.append((request, callback, self.io_loop.time()))
-        self._process_queue()
-        self._set_timeout(0)
-
-    def _handle_socket(self, event: int, fd: int, multi: Any, data: bytes) -> None:
-        """Called by libcurl when it wants to change the file descriptors
-        it cares about.
-        """
-        event_map = {
-            pycurl.POLL_NONE: ioloop.IOLoop.NONE,
-            pycurl.POLL_IN: ioloop.IOLoop.READ,
-            pycurl.POLL_OUT: ioloop.IOLoop.WRITE,
-            pycurl.POLL_INOUT: ioloop.IOLoop.READ | ioloop.IOLoop.WRITE,
-        }
-        if event == pycurl.POLL_REMOVE:
-            if fd in self._fds:
-                self.io_loop.remove_handler(fd)
-                del self._fds[fd]
-        else:
-            ioloop_event = event_map[event]
-            # libcurl sometimes closes a socket and then opens a new
-            # one using the same FD without giving us a POLL_NONE in
-            # between.  This is a problem with the epoll IOLoop,
-            # because the kernel can tell when a socket is closed and
-            # removes it from the epoll automatically, causing future
-            # update_handler calls to fail.  Since we can't tell when
-            # this has happened, always use remove and re-add
-            # instead of update.
-            if fd in self._fds:
-                self.io_loop.remove_handler(fd)
-            self.io_loop.add_handler(fd, self._handle_events, ioloop_event)
-            self._fds[fd] = ioloop_event
-
-    def _set_timeout(self, msecs: int) -> None:
-        """Called by libcurl to schedule a timeout."""
-        if self._timeout is not None:
-            self.io_loop.remove_timeout(self._timeout)
-        self._timeout = self.io_loop.add_timeout(
-            self.io_loop.time() + msecs / 1000.0, self._handle_timeout
-        )
-
-    def _handle_events(self, fd: int, events: int) -> None:
-        """Called by IOLoop when there is activity on one of our
-        file descriptors.
-        """
-        action = 0
-        if events & ioloop.IOLoop.READ:
-            action |= pycurl.CSELECT_IN
-        if events & ioloop.IOLoop.WRITE:
-            action |= pycurl.CSELECT_OUT
-        while True:
-            try:
-                ret, num_handles = self._multi.socket_action(fd, action)
-            except pycurl.error as e:
-                ret = e.args[0]
-            if ret != pycurl.E_CALL_MULTI_PERFORM:
-                break
-        self._finish_pending_requests()
-
-    def _handle_timeout(self) -> None:
-        """Called by IOLoop when the requested timeout has passed."""
-        self._timeout = None
-        while True:
-            try:
-                ret, num_handles = self._multi.socket_action(pycurl.SOCKET_TIMEOUT, 0)
-            except pycurl.error as e:
-                ret = e.args[0]
-            if ret != pycurl.E_CALL_MULTI_PERFORM:
-                break
-        self._finish_pending_requests()
-
-        # In theory, we shouldn't have to do this because curl will
-        # call _set_timeout whenever the timeout changes.  However,
-        # sometimes after _handle_timeout we will need to reschedule
-        # immediately even though nothing has changed from curl's
-        # perspective.  This is because when socket_action is
-        # called with SOCKET_TIMEOUT, libcurl decides internally which
-        # timeouts need to be processed by using a monotonic clock
-        # (where available) while tornado uses python's time.time()
-        # to decide when timeouts have occurred.  When those clocks
-        # disagree on elapsed time (as they will whenever there is an
-        # NTP adjustment), tornado might call _handle_timeout before
-        # libcurl is ready.  After each timeout, resync the scheduled
-        # timeout with libcurl's current state.
-        new_timeout = self._multi.timeout()
-        if new_timeout >= 0:
-            self._set_timeout(new_timeout)
-
-    def _handle_force_timeout(self) -> None:
-        """Called by IOLoop periodically to ask libcurl to process any
-        events it may have forgotten about.
-        """
-        while True:
-            try:
-                ret, num_handles = self._multi.socket_all()
-            except pycurl.error as e:
-                ret = e.args[0]
-            if ret != pycurl.E_CALL_MULTI_PERFORM:
-                break
-        self._finish_pending_requests()
-
-    def _finish_pending_requests(self) -> None:
-        """Process any requests that were completed by the last
-        call to multi.socket_action.
-        """
-        while True:
-            num_q, ok_list, err_list = self._multi.info_read()
-            for curl in ok_list:
-                self._finish(curl)
-            for curl, errnum, errmsg in err_list:
-                self._finish(curl, errnum, errmsg)
-            if num_q == 0:
-                break
-        self._process_queue()
-
-    def _process_queue(self) -> None:
-        while True:
-            started = 0
-            while self._free_list and self._requests:
-                started += 1
-                curl = self._free_list.pop()
-                (request, callback, queue_start_time) = self._requests.popleft()
-                curl.info = {
-                    "headers": httputil.HTTPHeaders(),
-                    "buffer": BytesIO(),
-                    "request": request,
-                    "callback": callback,
-                    "queue_start_time": queue_start_time,
-                    "curl_start_time": time.time(),
-                    "curl_start_ioloop_time": self.io_loop.current().time(),
-                }
-                try:
-                    self._curl_setup_request(
-                        curl, request, curl.info["buffer"], curl.info["headers"]
-                    )
-                except Exception as e:
-                    # If there was an error in setup, pass it on
-                    # to the callback. Note that allowing the
-                    # error to escape here will appear to work
-                    # most of the time since we are still in the
-                    # caller's original stack frame, but when
-                    # _process_queue() is called from
-                    # _finish_pending_requests the exceptions have
-                    # nowhere to go.
-                    self._free_list.append(curl)
-                    callback(HTTPResponse(request=request, code=599, error=e))
-                else:
-                    self._multi.add_handle(curl)
-
-            if not started:
-                break
-
-    def _finish(
-        self, curl: pycurl.Curl, curl_error: int = None, curl_message: str = None
-    ) -> None:
-        info = curl.info
-        curl.info = None
-        self._multi.remove_handle(curl)
-        self._free_list.append(curl)
-        buffer = info["buffer"]
-        if curl_error:
-            assert curl_message is not None
-            error = CurlError(curl_error, curl_message)  # type: Optional[CurlError]
-            assert error is not None
-            code = error.code
-            effective_url = None
-            buffer.close()
-            buffer = None
-        else:
-            error = None
-            code = curl.getinfo(pycurl.HTTP_CODE)
-            effective_url = curl.getinfo(pycurl.EFFECTIVE_URL)
-            buffer.seek(0)
-        # the various curl timings are documented at
-        # http://curl.haxx.se/libcurl/c/curl_easy_getinfo.html
-        time_info = dict(
-            queue=info["curl_start_ioloop_time"] - info["queue_start_time"],
-            namelookup=curl.getinfo(pycurl.NAMELOOKUP_TIME),
-            connect=curl.getinfo(pycurl.CONNECT_TIME),
-            appconnect=curl.getinfo(pycurl.APPCONNECT_TIME),
-            pretransfer=curl.getinfo(pycurl.PRETRANSFER_TIME),
-            starttransfer=curl.getinfo(pycurl.STARTTRANSFER_TIME),
-            total=curl.getinfo(pycurl.TOTAL_TIME),
-            redirect=curl.getinfo(pycurl.REDIRECT_TIME),
-        )
-        try:
-            info["callback"](
-                HTTPResponse(
-                    request=info["request"],
-                    code=code,
-                    headers=info["headers"],
-                    buffer=buffer,
-                    effective_url=effective_url,
-                    error=error,
-                    reason=info["headers"].get("X-Http-Reason", None),
-                    request_time=self.io_loop.time() - info["curl_start_ioloop_time"],
-                    start_time=info["curl_start_time"],
-                    time_info=time_info,
-                )
-            )
-        except Exception:
-            self.handle_callback_exception(info["callback"])
-
-    def handle_callback_exception(self, callback: Any) -> None:
-        app_log.error("Exception in callback %r", callback, exc_info=True)
-
-    def _curl_create(self) -> pycurl.Curl:
-        curl = pycurl.Curl()
-        if curl_log.isEnabledFor(logging.DEBUG):
-            curl.setopt(pycurl.VERBOSE, 1)
-            curl.setopt(pycurl.DEBUGFUNCTION, self._curl_debug)
-        if hasattr(
-            pycurl, "PROTOCOLS"
-        ):  # PROTOCOLS first appeared in pycurl 7.19.5 (2014-07-12)
-            curl.setopt(pycurl.PROTOCOLS, pycurl.PROTO_HTTP | pycurl.PROTO_HTTPS)
-            curl.setopt(pycurl.REDIR_PROTOCOLS, pycurl.PROTO_HTTP | pycurl.PROTO_HTTPS)
-        return curl
-
-    def _curl_setup_request(
-        self,
-        curl: pycurl.Curl,
-        request: HTTPRequest,
-        buffer: BytesIO,
-        headers: httputil.HTTPHeaders,
-    ) -> None:
-        curl.setopt(pycurl.URL, native_str(request.url))
-
-        # libcurl's magic "Expect: 100-continue" behavior causes delays
-        # with servers that don't support it (which include, among others,
-        # Google's OpenID endpoint).  Additionally, this behavior has
-        # a bug in conjunction with the curl_multi_socket_action API
-        # (https://sourceforge.net/tracker/?func=detail&atid=100976&aid=3039744&group_id=976),
-        # which increases the delays.  It's more trouble than it's worth,
-        # so just turn off the feature (yes, setting Expect: to an empty
-        # value is the official way to disable this)
-        if "Expect" not in request.headers:
-            request.headers["Expect"] = ""
-
-        # libcurl adds Pragma: no-cache by default; disable that too
-        if "Pragma" not in request.headers:
-            request.headers["Pragma"] = ""
-
-        curl.setopt(
-            pycurl.HTTPHEADER,
-            [
-                "%s: %s" % (native_str(k), native_str(v))
-                for k, v in request.headers.get_all()
-            ],
-        )
-
-        curl.setopt(
-            pycurl.HEADERFUNCTION,
-            functools.partial(
-                self._curl_header_callback, headers, request.header_callback
-            ),
-        )
-        if request.streaming_callback:
-
-            def write_function(b: Union[bytes, bytearray]) -> int:
-                assert request.streaming_callback is not None
-                self.io_loop.add_callback(request.streaming_callback, b)
-                return len(b)
-
-        else:
-            write_function = buffer.write
-        curl.setopt(pycurl.WRITEFUNCTION, write_function)
-        curl.setopt(pycurl.FOLLOWLOCATION, request.follow_redirects)
-        curl.setopt(pycurl.MAXREDIRS, request.max_redirects)
-        assert request.connect_timeout is not None
-        curl.setopt(pycurl.CONNECTTIMEOUT_MS, int(1000 * request.connect_timeout))
-        assert request.request_timeout is not None
-        curl.setopt(pycurl.TIMEOUT_MS, int(1000 * request.request_timeout))
-        if request.user_agent:
-            curl.setopt(pycurl.USERAGENT, native_str(request.user_agent))
-        else:
-            curl.setopt(pycurl.USERAGENT, "Mozilla/5.0 (compatible; pycurl)")
-        if request.network_interface:
-            curl.setopt(pycurl.INTERFACE, request.network_interface)
-        if request.decompress_response:
-            curl.setopt(pycurl.ENCODING, "gzip,deflate")
-        else:
-            curl.setopt(pycurl.ENCODING, "none")
-        if request.proxy_host and request.proxy_port:
-            curl.setopt(pycurl.PROXY, request.proxy_host)
-            curl.setopt(pycurl.PROXYPORT, request.proxy_port)
-            if request.proxy_username:
-                assert request.proxy_password is not None
-                credentials = httputil.encode_username_password(
-                    request.proxy_username, request.proxy_password
-                )
-                curl.setopt(pycurl.PROXYUSERPWD, credentials)
-
-            if request.proxy_auth_mode is None or request.proxy_auth_mode == "basic":
-                curl.setopt(pycurl.PROXYAUTH, pycurl.HTTPAUTH_BASIC)
-            elif request.proxy_auth_mode == "digest":
-                curl.setopt(pycurl.PROXYAUTH, pycurl.HTTPAUTH_DIGEST)
-            else:
-                raise ValueError(
-                    "Unsupported proxy_auth_mode %s" % request.proxy_auth_mode
-                )
-        else:
-            curl.setopt(pycurl.PROXY, "")
-            curl.unsetopt(pycurl.PROXYUSERPWD)
-        if request.validate_cert:
-            curl.setopt(pycurl.SSL_VERIFYPEER, 1)
-            curl.setopt(pycurl.SSL_VERIFYHOST, 2)
-        else:
-            curl.setopt(pycurl.SSL_VERIFYPEER, 0)
-            curl.setopt(pycurl.SSL_VERIFYHOST, 0)
-        if request.ca_certs is not None:
-            curl.setopt(pycurl.CAINFO, request.ca_certs)
-        else:
-            # There is no way to restore pycurl.CAINFO to its default value
-            # (Using unsetopt makes it reject all certificates).
-            # I don't see any way to read the default value from python so it
-            # can be restored later.  We'll have to just leave CAINFO untouched
-            # if no ca_certs file was specified, and require that if any
-            # request uses a custom ca_certs file, they all must.
-            pass
-
-        if request.allow_ipv6 is False:
-            # Curl behaves reasonably when DNS resolution gives an ipv6 address
-            # that we can't reach, so allow ipv6 unless the user asks to disable.
-            curl.setopt(pycurl.IPRESOLVE, pycurl.IPRESOLVE_V4)
-        else:
-            curl.setopt(pycurl.IPRESOLVE, pycurl.IPRESOLVE_WHATEVER)
-
-        # Set the request method through curl's irritating interface which makes
-        # up names for almost every single method
-        curl_options = {
-            "GET": pycurl.HTTPGET,
-            "POST": pycurl.POST,
-            "PUT": pycurl.UPLOAD,
-            "HEAD": pycurl.NOBODY,
-        }
-        custom_methods = set(["DELETE", "OPTIONS", "PATCH"])
-        for o in curl_options.values():
-            curl.setopt(o, False)
-        if request.method in curl_options:
-            curl.unsetopt(pycurl.CUSTOMREQUEST)
-            curl.setopt(curl_options[request.method], True)
-        elif request.allow_nonstandard_methods or request.method in custom_methods:
-            curl.setopt(pycurl.CUSTOMREQUEST, request.method)
-        else:
-            raise KeyError("unknown method " + request.method)
-
-        body_expected = request.method in ("POST", "PATCH", "PUT")
-        body_present = request.body is not None
-        if not request.allow_nonstandard_methods:
-            # Some HTTP methods nearly always have bodies while others
-            # almost never do. Fail in this case unless the user has
-            # opted out of sanity checks with allow_nonstandard_methods.
-            if (body_expected and not body_present) or (
-                body_present and not body_expected
-            ):
-                raise ValueError(
-                    "Body must %sbe None for method %s (unless "
-                    "allow_nonstandard_methods is true)"
-                    % ("not " if body_expected else "", request.method)
-                )
-
-        if body_expected or body_present:
-            if request.method == "GET":
-                # Even with `allow_nonstandard_methods` we disallow
-                # GET with a body (because libcurl doesn't allow it
-                # unless we use CUSTOMREQUEST). While the spec doesn't
-                # forbid clients from sending a body, it arguably
-                # disallows the server from doing anything with them.
-                raise ValueError("Body must be None for GET request")
-            request_buffer = BytesIO(utf8(request.body or ""))
-
-            def ioctl(cmd: int) -> None:
-                if cmd == curl.IOCMD_RESTARTREAD:
-                    request_buffer.seek(0)
-
-            curl.setopt(pycurl.READFUNCTION, request_buffer.read)
-            curl.setopt(pycurl.IOCTLFUNCTION, ioctl)
-            if request.method == "POST":
-                curl.setopt(pycurl.POSTFIELDSIZE, len(request.body or ""))
-            else:
-                curl.setopt(pycurl.UPLOAD, True)
-                curl.setopt(pycurl.INFILESIZE, len(request.body or ""))
-
-        if request.auth_username is not None:
-            assert request.auth_password is not None
-            if request.auth_mode is None or request.auth_mode == "basic":
-                curl.setopt(pycurl.HTTPAUTH, pycurl.HTTPAUTH_BASIC)
-            elif request.auth_mode == "digest":
-                curl.setopt(pycurl.HTTPAUTH, pycurl.HTTPAUTH_DIGEST)
-            else:
-                raise ValueError("Unsupported auth_mode %s" % request.auth_mode)
-
-            userpwd = httputil.encode_username_password(
-                request.auth_username, request.auth_password
-            )
-            curl.setopt(pycurl.USERPWD, userpwd)
-            curl_log.debug(
-                "%s %s (username: %r)",
-                request.method,
-                request.url,
-                request.auth_username,
-            )
-        else:
-            curl.unsetopt(pycurl.USERPWD)
-            curl_log.debug("%s %s", request.method, request.url)
-
-        if request.client_cert is not None:
-            curl.setopt(pycurl.SSLCERT, request.client_cert)
-
-        if request.client_key is not None:
-            curl.setopt(pycurl.SSLKEY, request.client_key)
-
-        if request.ssl_options is not None:
-            raise ValueError("ssl_options not supported in curl_httpclient")
-
-        if threading.active_count() > 1:
-            # libcurl/pycurl is not thread-safe by default.  When multiple threads
-            # are used, signals should be disabled.  This has the side effect
-            # of disabling DNS timeouts in some environments (when libcurl is
-            # not linked against ares), so we don't do it when there is only one
-            # thread.  Applications that use many short-lived threads may need
-            # to set NOSIGNAL manually in a prepare_curl_callback since
-            # there may not be any other threads running at the time we call
-            # threading.activeCount.
-            curl.setopt(pycurl.NOSIGNAL, 1)
-        if request.prepare_curl_callback is not None:
-            request.prepare_curl_callback(curl)
-
-    def _curl_header_callback(
-        self,
-        headers: httputil.HTTPHeaders,
-        header_callback: Callable[[str], None],
-        header_line_bytes: bytes,
-    ) -> None:
-        header_line = native_str(header_line_bytes.decode("latin1"))
-        if header_callback is not None:
-            self.io_loop.add_callback(header_callback, header_line)
-        # header_line as returned by curl includes the end-of-line characters.
-        # whitespace at the start should be preserved to allow multi-line headers
-        header_line = header_line.rstrip()
-        if header_line.startswith("HTTP/"):
-            headers.clear()
-            try:
-                (__, __, reason) = httputil.parse_response_start_line(header_line)
-                header_line = "X-Http-Reason: %s" % reason
-            except httputil.HTTPInputError:
-                return
-        if not header_line:
-            return
-        headers.parse_line(header_line)
-
-    def _curl_debug(self, debug_type: int, debug_msg: str) -> None:
-        debug_types = ("I", "<", ">", "<", ">")
-        if debug_type == 0:
-            debug_msg = native_str(debug_msg)
-            curl_log.debug("%s", debug_msg.strip())
-        elif debug_type in (1, 2):
-            debug_msg = native_str(debug_msg)
-            for line in debug_msg.splitlines():
-                curl_log.debug("%s %s", debug_types[debug_type], line)
-        elif debug_type == 4:
-            curl_log.debug("%s %r", debug_types[debug_type], debug_msg)
-
-
-class CurlError(HTTPError):
-    def __init__(self, errno: int, message: str) -> None:
-        HTTPError.__init__(self, 599, message)
-        self.errno = errno
-
-
-if __name__ == "__main__":
-    AsyncHTTPClient.configure(CurlAsyncHTTPClient)
-    main()
diff --git a/venv/lib/python3.7/site-packages/tornado/escape.py b/venv/lib/python3.7/site-packages/tornado/escape.py
deleted file mode 100644
index b0ec332..0000000
--- a/venv/lib/python3.7/site-packages/tornado/escape.py
+++ /dev/null
@@ -1,400 +0,0 @@
-#
-# Copyright 2009 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-"""Escaping/unescaping methods for HTML, JSON, URLs, and others.
-
-Also includes a few other miscellaneous string manipulation functions that
-have crept in over time.
-"""
-
-import html.entities
-import json
-import re
-import urllib.parse
-
-from tornado.util import unicode_type
-
-import typing
-from typing import Union, Any, Optional, Dict, List, Callable
-
-
-_XHTML_ESCAPE_RE = re.compile("[&<>\"']")
-_XHTML_ESCAPE_DICT = {
-    "&": "&amp;",
-    "<": "&lt;",
-    ">": "&gt;",
-    '"': "&quot;",
-    "'": "&#39;",
-}
-
-
-def xhtml_escape(value: Union[str, bytes]) -> str:
-    """Escapes a string so it is valid within HTML or XML.
-
-    Escapes the characters ``<``, ``>``, ``"``, ``'``, and ``&``.
-    When used in attribute values the escaped strings must be enclosed
-    in quotes.
-
-    .. versionchanged:: 3.2
-
-       Added the single quote to the list of escaped characters.
-    """
-    return _XHTML_ESCAPE_RE.sub(
-        lambda match: _XHTML_ESCAPE_DICT[match.group(0)], to_basestring(value)
-    )
-
-
-def xhtml_unescape(value: Union[str, bytes]) -> str:
-    """Un-escapes an XML-escaped string."""
-    return re.sub(r"&(#?)(\w+?);", _convert_entity, _unicode(value))
-
-
-# The fact that json_encode wraps json.dumps is an implementation detail.
-# Please see https://github.com/tornadoweb/tornado/pull/706
-# before sending a pull request that adds **kwargs to this function.
-def json_encode(value: Any) -> str:
-    """JSON-encodes the given Python object."""
-    # JSON permits but does not require forward slashes to be escaped.
-    # This is useful when json data is emitted in a <script> tag
-    # in HTML, as it prevents </script> tags from prematurely terminating
-    # the javascript.  Some json libraries do this escaping by default,
-    # although python's standard library does not, so we do it here.
-    # http://stackoverflow.com/questions/1580647/json-why-are-forward-slashes-escaped
-    return json.dumps(value).replace("</", "<\\/")
-
-
-def json_decode(value: Union[str, bytes]) -> Any:
-    """Returns Python objects for the given JSON string.
-
-    Supports both `str` and `bytes` inputs.
-    """
-    return json.loads(to_basestring(value))
-
-
-def squeeze(value: str) -> str:
-    """Replace all sequences of whitespace chars with a single space."""
-    return re.sub(r"[\x00-\x20]+", " ", value).strip()
-
-
-def url_escape(value: Union[str, bytes], plus: bool = True) -> str:
-    """Returns a URL-encoded version of the given value.
-
-    If ``plus`` is true (the default), spaces will be represented
-    as "+" instead of "%20".  This is appropriate for query strings
-    but not for the path component of a URL.  Note that this default
-    is the reverse of Python's urllib module.
-
-    .. versionadded:: 3.1
-        The ``plus`` argument
-    """
-    quote = urllib.parse.quote_plus if plus else urllib.parse.quote
-    return quote(utf8(value))
-
-
-@typing.overload
-def url_unescape(value: Union[str, bytes], encoding: None, plus: bool = True) -> bytes:
-    pass
-
-
-@typing.overload  # noqa: F811
-def url_unescape(
-    value: Union[str, bytes], encoding: str = "utf-8", plus: bool = True
-) -> str:
-    pass
-
-
-def url_unescape(  # noqa: F811
-    value: Union[str, bytes], encoding: Optional[str] = "utf-8", plus: bool = True
-) -> Union[str, bytes]:
-    """Decodes the given value from a URL.
-
-    The argument may be either a byte or unicode string.
-
-    If encoding is None, the result will be a byte string.  Otherwise,
-    the result is a unicode string in the specified encoding.
-
-    If ``plus`` is true (the default), plus signs will be interpreted
-    as spaces (literal plus signs must be represented as "%2B").  This
-    is appropriate for query strings and form-encoded values but not
-    for the path component of a URL.  Note that this default is the
-    reverse of Python's urllib module.
-
-    .. versionadded:: 3.1
-       The ``plus`` argument
-    """
-    if encoding is None:
-        if plus:
-            # unquote_to_bytes doesn't have a _plus variant
-            value = to_basestring(value).replace("+", " ")
-        return urllib.parse.unquote_to_bytes(value)
-    else:
-        unquote = urllib.parse.unquote_plus if plus else urllib.parse.unquote
-        return unquote(to_basestring(value), encoding=encoding)
-
-
-def parse_qs_bytes(
-    qs: str, keep_blank_values: bool = False, strict_parsing: bool = False
-) -> Dict[str, List[bytes]]:
-    """Parses a query string like urlparse.parse_qs, but returns the
-    values as byte strings.
-
-    Keys still become type str (interpreted as latin1 in python3!)
-    because it's too painful to keep them as byte strings in
-    python3 and in practice they're nearly always ascii anyway.
-    """
-    # This is gross, but python3 doesn't give us another way.
-    # Latin1 is the universal donor of character encodings.
-    result = urllib.parse.parse_qs(
-        qs, keep_blank_values, strict_parsing, encoding="latin1", errors="strict"
-    )
-    encoded = {}
-    for k, v in result.items():
-        encoded[k] = [i.encode("latin1") for i in v]
-    return encoded
-
-
-_UTF8_TYPES = (bytes, type(None))
-
-
-@typing.overload
-def utf8(value: bytes) -> bytes:
-    pass
-
-
-@typing.overload  # noqa: F811
-def utf8(value: str) -> bytes:
-    pass
-
-
-@typing.overload  # noqa: F811
-def utf8(value: None) -> None:
-    pass
-
-
-def utf8(value: Union[None, str, bytes]) -> Optional[bytes]:  # noqa: F811
-    """Converts a string argument to a byte string.
-
-    If the argument is already a byte string or None, it is returned unchanged.
-    Otherwise it must be a unicode string and is encoded as utf8.
-    """
-    if isinstance(value, _UTF8_TYPES):
-        return value
-    if not isinstance(value, unicode_type):
-        raise TypeError("Expected bytes, unicode, or None; got %r" % type(value))
-    return value.encode("utf-8")
-
-
-_TO_UNICODE_TYPES = (unicode_type, type(None))
-
-
-@typing.overload
-def to_unicode(value: str) -> str:
-    pass
-
-
-@typing.overload  # noqa: F811
-def to_unicode(value: bytes) -> str:
-    pass
-
-
-@typing.overload  # noqa: F811
-def to_unicode(value: None) -> None:
-    pass
-
-
-def to_unicode(value: Union[None, str, bytes]) -> Optional[str]:  # noqa: F811
-    """Converts a string argument to a unicode string.
-
-    If the argument is already a unicode string or None, it is returned
-    unchanged.  Otherwise it must be a byte string and is decoded as utf8.
-    """
-    if isinstance(value, _TO_UNICODE_TYPES):
-        return value
-    if not isinstance(value, bytes):
-        raise TypeError("Expected bytes, unicode, or None; got %r" % type(value))
-    return value.decode("utf-8")
-
-
-# to_unicode was previously named _unicode not because it was private,
-# but to avoid conflicts with the built-in unicode() function/type
-_unicode = to_unicode
-
-# When dealing with the standard library across python 2 and 3 it is
-# sometimes useful to have a direct conversion to the native string type
-native_str = to_unicode
-to_basestring = to_unicode
-
-
-def recursive_unicode(obj: Any) -> Any:
-    """Walks a simple data structure, converting byte strings to unicode.
-
-    Supports lists, tuples, and dictionaries.
-    """
-    if isinstance(obj, dict):
-        return dict(
-            (recursive_unicode(k), recursive_unicode(v)) for (k, v) in obj.items()
-        )
-    elif isinstance(obj, list):
-        return list(recursive_unicode(i) for i in obj)
-    elif isinstance(obj, tuple):
-        return tuple(recursive_unicode(i) for i in obj)
-    elif isinstance(obj, bytes):
-        return to_unicode(obj)
-    else:
-        return obj
-
-
-# I originally used the regex from
-# http://daringfireball.net/2010/07/improved_regex_for_matching_urls
-# but it gets all exponential on certain patterns (such as too many trailing
-# dots), causing the regex matcher to never return.
-# This regex should avoid those problems.
-# Use to_unicode instead of tornado.util.u - we don't want backslashes getting
-# processed as escapes.
-_URL_RE = re.compile(
-    to_unicode(
-        r"""\b((?:([\w-]+):(/{1,3})|www[.])(?:(?:(?:[^\s&()]|&amp;|&quot;)*(?:[^!"#$%&'()*+,.:;<=>?@\[\]^`{|}~\s]))|(?:\((?:[^\s&()]|&amp;|&quot;)*\)))+)"""  # noqa: E501
-    )
-)
-
-
-def linkify(
-    text: Union[str, bytes],
-    shorten: bool = False,
-    extra_params: Union[str, Callable[[str], str]] = "",
-    require_protocol: bool = False,
-    permitted_protocols: List[str] = ["http", "https"],
-) -> str:
-    """Converts plain text into HTML with links.
-
-    For example: ``linkify("Hello http://tornadoweb.org!")`` would return
-    ``Hello <a href="http://tornadoweb.org">http://tornadoweb.org</a>!``
-
-    Parameters:
-
-    * ``shorten``: Long urls will be shortened for display.
-
-    * ``extra_params``: Extra text to include in the link tag, or a callable
-      taking the link as an argument and returning the extra text
-      e.g. ``linkify(text, extra_params='rel="nofollow" class="external"')``,
-      or::
-
-          def extra_params_cb(url):
-              if url.startswith("http://example.com"):
-                  return 'class="internal"'
-              else:
-                  return 'class="external" rel="nofollow"'
-          linkify(text, extra_params=extra_params_cb)
-
-    * ``require_protocol``: Only linkify urls which include a protocol. If
-      this is False, urls such as www.facebook.com will also be linkified.
-
-    * ``permitted_protocols``: List (or set) of protocols which should be
-      linkified, e.g. ``linkify(text, permitted_protocols=["http", "ftp",
-      "mailto"])``. It is very unsafe to include protocols such as
-      ``javascript``.
-    """
-    if extra_params and not callable(extra_params):
-        extra_params = " " + extra_params.strip()
-
-    def make_link(m: typing.Match) -> str:
-        url = m.group(1)
-        proto = m.group(2)
-        if require_protocol and not proto:
-            return url  # not protocol, no linkify
-
-        if proto and proto not in permitted_protocols:
-            return url  # bad protocol, no linkify
-
-        href = m.group(1)
-        if not proto:
-            href = "http://" + href  # no proto specified, use http
-
-        if callable(extra_params):
-            params = " " + extra_params(href).strip()
-        else:
-            params = extra_params
-
-        # clip long urls. max_len is just an approximation
-        max_len = 30
-        if shorten and len(url) > max_len:
-            before_clip = url
-            if proto:
-                proto_len = len(proto) + 1 + len(m.group(3) or "")  # +1 for :
-            else:
-                proto_len = 0
-
-            parts = url[proto_len:].split("/")
-            if len(parts) > 1:
-                # Grab the whole host part plus the first bit of the path
-                # The path is usually not that interesting once shortened
-                # (no more slug, etc), so it really just provides a little
-                # extra indication of shortening.
-                url = (
-                    url[:proto_len]
-                    + parts[0]
-                    + "/"
-                    + parts[1][:8].split("?")[0].split(".")[0]
-                )
-
-            if len(url) > max_len * 1.5:  # still too long
-                url = url[:max_len]
-
-            if url != before_clip:
-                amp = url.rfind("&")
-                # avoid splitting html char entities
-                if amp > max_len - 5:
-                    url = url[:amp]
-                url += "..."
-
-                if len(url) >= len(before_clip):
-                    url = before_clip
-                else:
-                    # full url is visible on mouse-over (for those who don't
-                    # have a status bar, such as Safari by default)
-                    params += ' title="%s"' % href
-
-        return u'<a href="%s"%s>%s</a>' % (href, params, url)
-
-    # First HTML-escape so that our strings are all safe.
-    # The regex is modified to avoid character entites other than &amp; so
-    # that we won't pick up &quot;, etc.
-    text = _unicode(xhtml_escape(text))
-    return _URL_RE.sub(make_link, text)
-
-
-def _convert_entity(m: typing.Match) -> str:
-    if m.group(1) == "#":
-        try:
-            if m.group(2)[:1].lower() == "x":
-                return chr(int(m.group(2)[1:], 16))
-            else:
-                return chr(int(m.group(2)))
-        except ValueError:
-            return "&#%s;" % m.group(2)
-    try:
-        return _HTML_UNICODE_MAP[m.group(2)]
-    except KeyError:
-        return "&%s;" % m.group(2)
-
-
-def _build_unicode_map() -> Dict[str, str]:
-    unicode_map = {}
-    for name, value in html.entities.name2codepoint.items():
-        unicode_map[name] = chr(value)
-    return unicode_map
-
-
-_HTML_UNICODE_MAP = _build_unicode_map()
diff --git a/venv/lib/python3.7/site-packages/tornado/gen.py b/venv/lib/python3.7/site-packages/tornado/gen.py
deleted file mode 100644
index 7cc7ec7..0000000
--- a/venv/lib/python3.7/site-packages/tornado/gen.py
+++ /dev/null
@@ -1,845 +0,0 @@
-"""``tornado.gen`` implements generator-based coroutines.
-
-.. note::
-
-   The "decorator and generator" approach in this module is a
-   precursor to native coroutines (using ``async def`` and ``await``)
-   which were introduced in Python 3.5. Applications that do not
-   require compatibility with older versions of Python should use
-   native coroutines instead. Some parts of this module are still
-   useful with native coroutines, notably `multi`, `sleep`,
-   `WaitIterator`, and `with_timeout`. Some of these functions have
-   counterparts in the `asyncio` module which may be used as well,
-   although the two may not necessarily be 100% compatible.
-
-Coroutines provide an easier way to work in an asynchronous
-environment than chaining callbacks. Code using coroutines is
-technically asynchronous, but it is written as a single generator
-instead of a collection of separate functions.
-
-For example, here's a coroutine-based handler:
-
-.. testcode::
-
-    class GenAsyncHandler(RequestHandler):
-        @gen.coroutine
-        def get(self):
-            http_client = AsyncHTTPClient()
-            response = yield http_client.fetch("http://example.com")
-            do_something_with_response(response)
-            self.render("template.html")
-
-.. testoutput::
-   :hide:
-
-Asynchronous functions in Tornado return an ``Awaitable`` or `.Future`;
-yielding this object returns its result.
-
-You can also yield a list or dict of other yieldable objects, which
-will be started at the same time and run in parallel; a list or dict
-of results will be returned when they are all finished:
-
-.. testcode::
-
-    @gen.coroutine
-    def get(self):
-        http_client = AsyncHTTPClient()
-        response1, response2 = yield [http_client.fetch(url1),
-                                      http_client.fetch(url2)]
-        response_dict = yield dict(response3=http_client.fetch(url3),
-                                   response4=http_client.fetch(url4))
-        response3 = response_dict['response3']
-        response4 = response_dict['response4']
-
-.. testoutput::
-   :hide:
-
-If ``tornado.platform.twisted`` is imported, it is also possible to
-yield Twisted's ``Deferred`` objects. See the `convert_yielded`
-function to extend this mechanism.
-
-.. versionchanged:: 3.2
-   Dict support added.
-
-.. versionchanged:: 4.1
-   Support added for yielding ``asyncio`` Futures and Twisted Deferreds
-   via ``singledispatch``.
-
-"""
-import asyncio
-import builtins
-import collections
-from collections.abc import Generator
-import concurrent.futures
-import datetime
-import functools
-from functools import singledispatch
-from inspect import isawaitable
-import sys
-import types
-
-from tornado.concurrent import (
-    Future,
-    is_future,
-    chain_future,
-    future_set_exc_info,
-    future_add_done_callback,
-    future_set_result_unless_cancelled,
-)
-from tornado.ioloop import IOLoop
-from tornado.log import app_log
-from tornado.util import TimeoutError
-
-import typing
-from typing import Union, Any, Callable, List, Type, Tuple, Awaitable, Dict
-
-if typing.TYPE_CHECKING:
-    from typing import Sequence, Deque, Optional, Set, Iterable  # noqa: F401
-
-_T = typing.TypeVar("_T")
-
-_Yieldable = Union[
-    None, Awaitable, List[Awaitable], Dict[Any, Awaitable], concurrent.futures.Future
-]
-
-
-class KeyReuseError(Exception):
-    pass
-
-
-class UnknownKeyError(Exception):
-    pass
-
-
-class LeakedCallbackError(Exception):
-    pass
-
-
-class BadYieldError(Exception):
-    pass
-
-
-class ReturnValueIgnoredError(Exception):
-    pass
-
-
-def _value_from_stopiteration(e: Union[StopIteration, "Return"]) -> Any:
-    try:
-        # StopIteration has a value attribute beginning in py33.
-        # So does our Return class.
-        return e.value
-    except AttributeError:
-        pass
-    try:
-        # Cython backports coroutine functionality by putting the value in
-        # e.args[0].
-        return e.args[0]
-    except (AttributeError, IndexError):
-        return None
-
-
-def _create_future() -> Future:
-    future = Future()  # type: Future
-    # Fixup asyncio debug info by removing extraneous stack entries
-    source_traceback = getattr(future, "_source_traceback", ())
-    while source_traceback:
-        # Each traceback entry is equivalent to a
-        # (filename, self.lineno, self.name, self.line) tuple
-        filename = source_traceback[-1][0]
-        if filename == __file__:
-            del source_traceback[-1]
-        else:
-            break
-    return future
-
-
-def coroutine(
-    func: Callable[..., "Generator[Any, Any, _T]"]
-) -> Callable[..., "Future[_T]"]:
-    """Decorator for asynchronous generators.
-
-    For compatibility with older versions of Python, coroutines may
-    also "return" by raising the special exception `Return(value)
-    <Return>`.
-
-    Functions with this decorator return a `.Future`.
-
-    .. warning::
-
-       When exceptions occur inside a coroutine, the exception
-       information will be stored in the `.Future` object. You must
-       examine the result of the `.Future` object, or the exception
-       may go unnoticed by your code. This means yielding the function
-       if called from another coroutine, using something like
-       `.IOLoop.run_sync` for top-level calls, or passing the `.Future`
-       to `.IOLoop.add_future`.
-
-    .. versionchanged:: 6.0
-
-       The ``callback`` argument was removed. Use the returned
-       awaitable object instead.
-
-    """
-
-    @functools.wraps(func)
-    def wrapper(*args, **kwargs):
-        # type: (*Any, **Any) -> Future[_T]
-        # This function is type-annotated with a comment to work around
-        # https://bitbucket.org/pypy/pypy/issues/2868/segfault-with-args-type-annotation-in
-        future = _create_future()
-        try:
-            result = func(*args, **kwargs)
-        except (Return, StopIteration) as e:
-            result = _value_from_stopiteration(e)
-        except Exception:
-            future_set_exc_info(future, sys.exc_info())
-            try:
-                return future
-            finally:
-                # Avoid circular references
-                future = None  # type: ignore
-        else:
-            if isinstance(result, Generator):
-                # Inline the first iteration of Runner.run.  This lets us
-                # avoid the cost of creating a Runner when the coroutine
-                # never actually yields, which in turn allows us to
-                # use "optional" coroutines in critical path code without
-                # performance penalty for the synchronous case.
-                try:
-                    yielded = next(result)
-                except (StopIteration, Return) as e:
-                    future_set_result_unless_cancelled(
-                        future, _value_from_stopiteration(e)
-                    )
-                except Exception:
-                    future_set_exc_info(future, sys.exc_info())
-                else:
-                    # Provide strong references to Runner objects as long
-                    # as their result future objects also have strong
-                    # references (typically from the parent coroutine's
-                    # Runner). This keeps the coroutine's Runner alive.
-                    # We do this by exploiting the public API
-                    # add_done_callback() instead of putting a private
-                    # attribute on the Future.
-                    # (Github issues #1769, #2229).
-                    runner = Runner(result, future, yielded)
-                    future.add_done_callback(lambda _: runner)
-                yielded = None
-                try:
-                    return future
-                finally:
-                    # Subtle memory optimization: if next() raised an exception,
-                    # the future's exc_info contains a traceback which
-                    # includes this stack frame.  This creates a cycle,
-                    # which will be collected at the next full GC but has
-                    # been shown to greatly increase memory usage of
-                    # benchmarks (relative to the refcount-based scheme
-                    # used in the absence of cycles).  We can avoid the
-                    # cycle by clearing the local variable after we return it.
-                    future = None  # type: ignore
-        future_set_result_unless_cancelled(future, result)
-        return future
-
-    wrapper.__wrapped__ = func  # type: ignore
-    wrapper.__tornado_coroutine__ = True  # type: ignore
-    return wrapper
-
-
-def is_coroutine_function(func: Any) -> bool:
-    """Return whether *func* is a coroutine function, i.e. a function
-    wrapped with `~.gen.coroutine`.
-
-    .. versionadded:: 4.5
-    """
-    return getattr(func, "__tornado_coroutine__", False)
-
-
-class Return(Exception):
-    """Special exception to return a value from a `coroutine`.
-
-    If this exception is raised, its value argument is used as the
-    result of the coroutine::
-
-        @gen.coroutine
-        def fetch_json(url):
-            response = yield AsyncHTTPClient().fetch(url)
-            raise gen.Return(json_decode(response.body))
-
-    In Python 3.3, this exception is no longer necessary: the ``return``
-    statement can be used directly to return a value (previously
-    ``yield`` and ``return`` with a value could not be combined in the
-    same function).
-
-    By analogy with the return statement, the value argument is optional,
-    but it is never necessary to ``raise gen.Return()``.  The ``return``
-    statement can be used with no arguments instead.
-    """
-
-    def __init__(self, value: Any = None) -> None:
-        super(Return, self).__init__()
-        self.value = value
-        # Cython recognizes subclasses of StopIteration with a .args tuple.
-        self.args = (value,)
-
-
-class WaitIterator(object):
-    """Provides an iterator to yield the results of awaitables as they finish.
-
-    Yielding a set of awaitables like this:
-
-    ``results = yield [awaitable1, awaitable2]``
-
-    pauses the coroutine until both ``awaitable1`` and ``awaitable2``
-    return, and then restarts the coroutine with the results of both
-    awaitables. If either awaitable raises an exception, the
-    expression will raise that exception and all the results will be
-    lost.
-
-    If you need to get the result of each awaitable as soon as possible,
-    or if you need the result of some awaitables even if others produce
-    errors, you can use ``WaitIterator``::
-
-      wait_iterator = gen.WaitIterator(awaitable1, awaitable2)
-      while not wait_iterator.done():
-          try:
-              result = yield wait_iterator.next()
-          except Exception as e:
-              print("Error {} from {}".format(e, wait_iterator.current_future))
-          else:
-              print("Result {} received from {} at {}".format(
-                  result, wait_iterator.current_future,
-                  wait_iterator.current_index))
-
-    Because results are returned as soon as they are available the
-    output from the iterator *will not be in the same order as the
-    input arguments*. If you need to know which future produced the
-    current result, you can use the attributes
-    ``WaitIterator.current_future``, or ``WaitIterator.current_index``
-    to get the index of the awaitable from the input list. (if keyword
-    arguments were used in the construction of the `WaitIterator`,
-    ``current_index`` will use the corresponding keyword).
-
-    On Python 3.5, `WaitIterator` implements the async iterator
-    protocol, so it can be used with the ``async for`` statement (note
-    that in this version the entire iteration is aborted if any value
-    raises an exception, while the previous example can continue past
-    individual errors)::
-
-      async for result in gen.WaitIterator(future1, future2):
-          print("Result {} received from {} at {}".format(
-              result, wait_iterator.current_future,
-              wait_iterator.current_index))
-
-    .. versionadded:: 4.1
-
-    .. versionchanged:: 4.3
-       Added ``async for`` support in Python 3.5.
-
-    """
-
-    _unfinished = {}  # type: Dict[Future, Union[int, str]]
-
-    def __init__(self, *args: Future, **kwargs: Future) -> None:
-        if args and kwargs:
-            raise ValueError("You must provide args or kwargs, not both")
-
-        if kwargs:
-            self._unfinished = dict((f, k) for (k, f) in kwargs.items())
-            futures = list(kwargs.values())  # type: Sequence[Future]
-        else:
-            self._unfinished = dict((f, i) for (i, f) in enumerate(args))
-            futures = args
-
-        self._finished = collections.deque()  # type: Deque[Future]
-        self.current_index = None  # type: Optional[Union[str, int]]
-        self.current_future = None  # type: Optional[Future]
-        self._running_future = None  # type: Optional[Future]
-
-        for future in futures:
-            future_add_done_callback(future, self._done_callback)
-
-    def done(self) -> bool:
-        """Returns True if this iterator has no more results."""
-        if self._finished or self._unfinished:
-            return False
-        # Clear the 'current' values when iteration is done.
-        self.current_index = self.current_future = None
-        return True
-
-    def next(self) -> Future:
-        """Returns a `.Future` that will yield the next available result.
-
-        Note that this `.Future` will not be the same object as any of
-        the inputs.
-        """
-        self._running_future = Future()
-
-        if self._finished:
-            self._return_result(self._finished.popleft())
-
-        return self._running_future
-
-    def _done_callback(self, done: Future) -> None:
-        if self._running_future and not self._running_future.done():
-            self._return_result(done)
-        else:
-            self._finished.append(done)
-
-    def _return_result(self, done: Future) -> None:
-        """Called set the returned future's state that of the future
-        we yielded, and set the current future for the iterator.
-        """
-        if self._running_future is None:
-            raise Exception("no future is running")
-        chain_future(done, self._running_future)
-
-        self.current_future = done
-        self.current_index = self._unfinished.pop(done)
-
-    def __aiter__(self) -> typing.AsyncIterator:
-        return self
-
-    def __anext__(self) -> Future:
-        if self.done():
-            # Lookup by name to silence pyflakes on older versions.
-            raise getattr(builtins, "StopAsyncIteration")()
-        return self.next()
-
-
-def multi(
-    children: Union[List[_Yieldable], Dict[Any, _Yieldable]],
-    quiet_exceptions: "Union[Type[Exception], Tuple[Type[Exception], ...]]" = (),
-) -> "Union[Future[List], Future[Dict]]":
-    """Runs multiple asynchronous operations in parallel.
-
-    ``children`` may either be a list or a dict whose values are
-    yieldable objects. ``multi()`` returns a new yieldable
-    object that resolves to a parallel structure containing their
-    results. If ``children`` is a list, the result is a list of
-    results in the same order; if it is a dict, the result is a dict
-    with the same keys.
-
-    That is, ``results = yield multi(list_of_futures)`` is equivalent
-    to::
-
-        results = []
-        for future in list_of_futures:
-            results.append(yield future)
-
-    If any children raise exceptions, ``multi()`` will raise the first
-    one. All others will be logged, unless they are of types
-    contained in the ``quiet_exceptions`` argument.
-
-    In a ``yield``-based coroutine, it is not normally necessary to
-    call this function directly, since the coroutine runner will
-    do it automatically when a list or dict is yielded. However,
-    it is necessary in ``await``-based coroutines, or to pass
-    the ``quiet_exceptions`` argument.
-
-    This function is available under the names ``multi()`` and ``Multi()``
-    for historical reasons.
-
-    Cancelling a `.Future` returned by ``multi()`` does not cancel its
-    children. `asyncio.gather` is similar to ``multi()``, but it does
-    cancel its children.
-
-    .. versionchanged:: 4.2
-       If multiple yieldables fail, any exceptions after the first
-       (which is raised) will be logged. Added the ``quiet_exceptions``
-       argument to suppress this logging for selected exception types.
-
-    .. versionchanged:: 4.3
-       Replaced the class ``Multi`` and the function ``multi_future``
-       with a unified function ``multi``. Added support for yieldables
-       other than ``YieldPoint`` and `.Future`.
-
-    """
-    return multi_future(children, quiet_exceptions=quiet_exceptions)
-
-
-Multi = multi
-
-
-def multi_future(
-    children: Union[List[_Yieldable], Dict[Any, _Yieldable]],
-    quiet_exceptions: "Union[Type[Exception], Tuple[Type[Exception], ...]]" = (),
-) -> "Union[Future[List], Future[Dict]]":
-    """Wait for multiple asynchronous futures in parallel.
-
-    Since Tornado 6.0, this function is exactly the same as `multi`.
-
-    .. versionadded:: 4.0
-
-    .. versionchanged:: 4.2
-       If multiple ``Futures`` fail, any exceptions after the first (which is
-       raised) will be logged. Added the ``quiet_exceptions``
-       argument to suppress this logging for selected exception types.
-
-    .. deprecated:: 4.3
-       Use `multi` instead.
-    """
-    if isinstance(children, dict):
-        keys = list(children.keys())  # type: Optional[List]
-        children_seq = children.values()  # type: Iterable
-    else:
-        keys = None
-        children_seq = children
-    children_futs = list(map(convert_yielded, children_seq))
-    assert all(is_future(i) or isinstance(i, _NullFuture) for i in children_futs)
-    unfinished_children = set(children_futs)
-
-    future = _create_future()
-    if not children_futs:
-        future_set_result_unless_cancelled(future, {} if keys is not None else [])
-
-    def callback(fut: Future) -> None:
-        unfinished_children.remove(fut)
-        if not unfinished_children:
-            result_list = []
-            for f in children_futs:
-                try:
-                    result_list.append(f.result())
-                except Exception as e:
-                    if future.done():
-                        if not isinstance(e, quiet_exceptions):
-                            app_log.error(
-                                "Multiple exceptions in yield list", exc_info=True
-                            )
-                    else:
-                        future_set_exc_info(future, sys.exc_info())
-            if not future.done():
-                if keys is not None:
-                    future_set_result_unless_cancelled(
-                        future, dict(zip(keys, result_list))
-                    )
-                else:
-                    future_set_result_unless_cancelled(future, result_list)
-
-    listening = set()  # type: Set[Future]
-    for f in children_futs:
-        if f not in listening:
-            listening.add(f)
-            future_add_done_callback(f, callback)
-    return future
-
-
-def maybe_future(x: Any) -> Future:
-    """Converts ``x`` into a `.Future`.
-
-    If ``x`` is already a `.Future`, it is simply returned; otherwise
-    it is wrapped in a new `.Future`.  This is suitable for use as
-    ``result = yield gen.maybe_future(f())`` when you don't know whether
-    ``f()`` returns a `.Future` or not.
-
-    .. deprecated:: 4.3
-       This function only handles ``Futures``, not other yieldable objects.
-       Instead of `maybe_future`, check for the non-future result types
-       you expect (often just ``None``), and ``yield`` anything unknown.
-    """
-    if is_future(x):
-        return x
-    else:
-        fut = _create_future()
-        fut.set_result(x)
-        return fut
-
-
-def with_timeout(
-    timeout: Union[float, datetime.timedelta],
-    future: _Yieldable,
-    quiet_exceptions: "Union[Type[Exception], Tuple[Type[Exception], ...]]" = (),
-) -> Future:
-    """Wraps a `.Future` (or other yieldable object) in a timeout.
-
-    Raises `tornado.util.TimeoutError` if the input future does not
-    complete before ``timeout``, which may be specified in any form
-    allowed by `.IOLoop.add_timeout` (i.e. a `datetime.timedelta` or
-    an absolute time relative to `.IOLoop.time`)
-
-    If the wrapped `.Future` fails after it has timed out, the exception
-    will be logged unless it is either of a type contained in
-    ``quiet_exceptions`` (which may be an exception type or a sequence of
-    types), or an ``asyncio.CancelledError``.
-
-    The wrapped `.Future` is not canceled when the timeout expires,
-    permitting it to be reused. `asyncio.wait_for` is similar to this
-    function but it does cancel the wrapped `.Future` on timeout.
-
-    .. versionadded:: 4.0
-
-    .. versionchanged:: 4.1
-       Added the ``quiet_exceptions`` argument and the logging of unhandled
-       exceptions.
-
-    .. versionchanged:: 4.4
-       Added support for yieldable objects other than `.Future`.
-
-    .. versionchanged:: 6.0.3
-       ``asyncio.CancelledError`` is now always considered "quiet".
-
-    """
-    # It's tempting to optimize this by cancelling the input future on timeout
-    # instead of creating a new one, but A) we can't know if we are the only
-    # one waiting on the input future, so cancelling it might disrupt other
-    # callers and B) concurrent futures can only be cancelled while they are
-    # in the queue, so cancellation cannot reliably bound our waiting time.
-    future_converted = convert_yielded(future)
-    result = _create_future()
-    chain_future(future_converted, result)
-    io_loop = IOLoop.current()
-
-    def error_callback(future: Future) -> None:
-        try:
-            future.result()
-        except asyncio.CancelledError:
-            pass
-        except Exception as e:
-            if not isinstance(e, quiet_exceptions):
-                app_log.error(
-                    "Exception in Future %r after timeout", future, exc_info=True
-                )
-
-    def timeout_callback() -> None:
-        if not result.done():
-            result.set_exception(TimeoutError("Timeout"))
-        # In case the wrapped future goes on to fail, log it.
-        future_add_done_callback(future_converted, error_callback)
-
-    timeout_handle = io_loop.add_timeout(timeout, timeout_callback)
-    if isinstance(future_converted, Future):
-        # We know this future will resolve on the IOLoop, so we don't
-        # need the extra thread-safety of IOLoop.add_future (and we also
-        # don't care about StackContext here.
-        future_add_done_callback(
-            future_converted, lambda future: io_loop.remove_timeout(timeout_handle)
-        )
-    else:
-        # concurrent.futures.Futures may resolve on any thread, so we
-        # need to route them back to the IOLoop.
-        io_loop.add_future(
-            future_converted, lambda future: io_loop.remove_timeout(timeout_handle)
-        )
-    return result
-
-
-def sleep(duration: float) -> "Future[None]":
-    """Return a `.Future` that resolves after the given number of seconds.
-
-    When used with ``yield`` in a coroutine, this is a non-blocking
-    analogue to `time.sleep` (which should not be used in coroutines
-    because it is blocking)::
-
-        yield gen.sleep(0.5)
-
-    Note that calling this function on its own does nothing; you must
-    wait on the `.Future` it returns (usually by yielding it).
-
-    .. versionadded:: 4.1
-    """
-    f = _create_future()
-    IOLoop.current().call_later(
-        duration, lambda: future_set_result_unless_cancelled(f, None)
-    )
-    return f
-
-
-class _NullFuture(object):
-    """_NullFuture resembles a Future that finished with a result of None.
-
-    It's not actually a `Future` to avoid depending on a particular event loop.
-    Handled as a special case in the coroutine runner.
-
-    We lie and tell the type checker that a _NullFuture is a Future so
-    we don't have to leak _NullFuture into lots of public APIs. But
-    this means that the type checker can't warn us when we're passing
-    a _NullFuture into a code path that doesn't understand what to do
-    with it.
-    """
-
-    def result(self) -> None:
-        return None
-
-    def done(self) -> bool:
-        return True
-
-
-# _null_future is used as a dummy value in the coroutine runner. It differs
-# from moment in that moment always adds a delay of one IOLoop iteration
-# while _null_future is processed as soon as possible.
-_null_future = typing.cast(Future, _NullFuture())
-
-moment = typing.cast(Future, _NullFuture())
-moment.__doc__ = """A special object which may be yielded to allow the IOLoop to run for
-one iteration.
-
-This is not needed in normal use but it can be helpful in long-running
-coroutines that are likely to yield Futures that are ready instantly.
-
-Usage: ``yield gen.moment``
-
-In native coroutines, the equivalent of ``yield gen.moment`` is
-``await asyncio.sleep(0)``.
-
-.. versionadded:: 4.0
-
-.. deprecated:: 4.5
-   ``yield None`` (or ``yield`` with no argument) is now equivalent to
-    ``yield gen.moment``.
-"""
-
-
-class Runner(object):
-    """Internal implementation of `tornado.gen.coroutine`.
-
-    Maintains information about pending callbacks and their results.
-
-    The results of the generator are stored in ``result_future`` (a
-    `.Future`)
-    """
-
-    def __init__(
-        self,
-        gen: "Generator[_Yieldable, Any, _T]",
-        result_future: "Future[_T]",
-        first_yielded: _Yieldable,
-    ) -> None:
-        self.gen = gen
-        self.result_future = result_future
-        self.future = _null_future  # type: Union[None, Future]
-        self.running = False
-        self.finished = False
-        self.io_loop = IOLoop.current()
-        if self.handle_yield(first_yielded):
-            gen = result_future = first_yielded = None  # type: ignore
-            self.run()
-
-    def run(self) -> None:
-        """Starts or resumes the generator, running until it reaches a
-        yield point that is not ready.
-        """
-        if self.running or self.finished:
-            return
-        try:
-            self.running = True
-            while True:
-                future = self.future
-                if future is None:
-                    raise Exception("No pending future")
-                if not future.done():
-                    return
-                self.future = None
-                try:
-                    exc_info = None
-
-                    try:
-                        value = future.result()
-                    except Exception:
-                        exc_info = sys.exc_info()
-                    future = None
-
-                    if exc_info is not None:
-                        try:
-                            yielded = self.gen.throw(*exc_info)  # type: ignore
-                        finally:
-                            # Break up a reference to itself
-                            # for faster GC on CPython.
-                            exc_info = None
-                    else:
-                        yielded = self.gen.send(value)
-
-                except (StopIteration, Return) as e:
-                    self.finished = True
-                    self.future = _null_future
-                    future_set_result_unless_cancelled(
-                        self.result_future, _value_from_stopiteration(e)
-                    )
-                    self.result_future = None  # type: ignore
-                    return
-                except Exception:
-                    self.finished = True
-                    self.future = _null_future
-                    future_set_exc_info(self.result_future, sys.exc_info())
-                    self.result_future = None  # type: ignore
-                    return
-                if not self.handle_yield(yielded):
-                    return
-                yielded = None
-        finally:
-            self.running = False
-
-    def handle_yield(self, yielded: _Yieldable) -> bool:
-        try:
-            self.future = convert_yielded(yielded)
-        except BadYieldError:
-            self.future = Future()
-            future_set_exc_info(self.future, sys.exc_info())
-
-        if self.future is moment:
-            self.io_loop.add_callback(self.run)
-            return False
-        elif self.future is None:
-            raise Exception("no pending future")
-        elif not self.future.done():
-
-            def inner(f: Any) -> None:
-                # Break a reference cycle to speed GC.
-                f = None  # noqa: F841
-                self.run()
-
-            self.io_loop.add_future(self.future, inner)
-            return False
-        return True
-
-    def handle_exception(
-        self, typ: Type[Exception], value: Exception, tb: types.TracebackType
-    ) -> bool:
-        if not self.running and not self.finished:
-            self.future = Future()
-            future_set_exc_info(self.future, (typ, value, tb))
-            self.run()
-            return True
-        else:
-            return False
-
-
-# Convert Awaitables into Futures.
-try:
-    _wrap_awaitable = asyncio.ensure_future
-except AttributeError:
-    # asyncio.ensure_future was introduced in Python 3.4.4, but
-    # Debian jessie still ships with 3.4.2 so try the old name.
-    _wrap_awaitable = getattr(asyncio, "async")
-
-
-def convert_yielded(yielded: _Yieldable) -> Future:
-    """Convert a yielded object into a `.Future`.
-
-    The default implementation accepts lists, dictionaries, and
-    Futures. This has the side effect of starting any coroutines that
-    did not start themselves, similar to `asyncio.ensure_future`.
-
-    If the `~functools.singledispatch` library is available, this function
-    may be extended to support additional types. For example::
-
-        @convert_yielded.register(asyncio.Future)
-        def _(asyncio_future):
-            return tornado.platform.asyncio.to_tornado_future(asyncio_future)
-
-    .. versionadded:: 4.1
-
-    """
-    if yielded is None or yielded is moment:
-        return moment
-    elif yielded is _null_future:
-        return _null_future
-    elif isinstance(yielded, (list, dict)):
-        return multi(yielded)  # type: ignore
-    elif is_future(yielded):
-        return typing.cast(Future, yielded)
-    elif isawaitable(yielded):
-        return _wrap_awaitable(yielded)  # type: ignore
-    else:
-        raise BadYieldError("yielded unknown object %r" % (yielded,))
-
-
-convert_yielded = singledispatch(convert_yielded)
diff --git a/venv/lib/python3.7/site-packages/tornado/http1connection.py b/venv/lib/python3.7/site-packages/tornado/http1connection.py
deleted file mode 100644
index 434f16a..0000000
--- a/venv/lib/python3.7/site-packages/tornado/http1connection.py
+++ /dev/null
@@ -1,836 +0,0 @@
-#
-# Copyright 2014 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-"""Client and server implementations of HTTP/1.x.
-
-.. versionadded:: 4.0
-"""
-
-import asyncio
-import logging
-import re
-import types
-
-from tornado.concurrent import (
-    Future,
-    future_add_done_callback,
-    future_set_result_unless_cancelled,
-)
-from tornado.escape import native_str, utf8
-from tornado import gen
-from tornado import httputil
-from tornado import iostream
-from tornado.log import gen_log, app_log
-from tornado.util import GzipDecompressor
-
-
-from typing import cast, Optional, Type, Awaitable, Callable, Union, Tuple
-
-
-class _QuietException(Exception):
-    def __init__(self) -> None:
-        pass
-
-
-class _ExceptionLoggingContext(object):
-    """Used with the ``with`` statement when calling delegate methods to
-    log any exceptions with the given logger.  Any exceptions caught are
-    converted to _QuietException
-    """
-
-    def __init__(self, logger: logging.Logger) -> None:
-        self.logger = logger
-
-    def __enter__(self) -> None:
-        pass
-
-    def __exit__(
-        self,
-        typ: "Optional[Type[BaseException]]",
-        value: Optional[BaseException],
-        tb: types.TracebackType,
-    ) -> None:
-        if value is not None:
-            assert typ is not None
-            self.logger.error("Uncaught exception", exc_info=(typ, value, tb))
-            raise _QuietException
-
-
-class HTTP1ConnectionParameters(object):
-    """Parameters for `.HTTP1Connection` and `.HTTP1ServerConnection`.
-    """
-
-    def __init__(
-        self,
-        no_keep_alive: bool = False,
-        chunk_size: int = None,
-        max_header_size: int = None,
-        header_timeout: float = None,
-        max_body_size: int = None,
-        body_timeout: float = None,
-        decompress: bool = False,
-    ) -> None:
-        """
-        :arg bool no_keep_alive: If true, always close the connection after
-            one request.
-        :arg int chunk_size: how much data to read into memory at once
-        :arg int max_header_size:  maximum amount of data for HTTP headers
-        :arg float header_timeout: how long to wait for all headers (seconds)
-        :arg int max_body_size: maximum amount of data for body
-        :arg float body_timeout: how long to wait while reading body (seconds)
-        :arg bool decompress: if true, decode incoming
-            ``Content-Encoding: gzip``
-        """
-        self.no_keep_alive = no_keep_alive
-        self.chunk_size = chunk_size or 65536
-        self.max_header_size = max_header_size or 65536
-        self.header_timeout = header_timeout
-        self.max_body_size = max_body_size
-        self.body_timeout = body_timeout
-        self.decompress = decompress
-
-
-class HTTP1Connection(httputil.HTTPConnection):
-    """Implements the HTTP/1.x protocol.
-
-    This class can be on its own for clients, or via `HTTP1ServerConnection`
-    for servers.
-    """
-
-    def __init__(
-        self,
-        stream: iostream.IOStream,
-        is_client: bool,
-        params: HTTP1ConnectionParameters = None,
-        context: object = None,
-    ) -> None:
-        """
-        :arg stream: an `.IOStream`
-        :arg bool is_client: client or server
-        :arg params: a `.HTTP1ConnectionParameters` instance or ``None``
-        :arg context: an opaque application-defined object that can be accessed
-            as ``connection.context``.
-        """
-        self.is_client = is_client
-        self.stream = stream
-        if params is None:
-            params = HTTP1ConnectionParameters()
-        self.params = params
-        self.context = context
-        self.no_keep_alive = params.no_keep_alive
-        # The body limits can be altered by the delegate, so save them
-        # here instead of just referencing self.params later.
-        self._max_body_size = self.params.max_body_size or self.stream.max_buffer_size
-        self._body_timeout = self.params.body_timeout
-        # _write_finished is set to True when finish() has been called,
-        # i.e. there will be no more data sent.  Data may still be in the
-        # stream's write buffer.
-        self._write_finished = False
-        # True when we have read the entire incoming body.
-        self._read_finished = False
-        # _finish_future resolves when all data has been written and flushed
-        # to the IOStream.
-        self._finish_future = Future()  # type: Future[None]
-        # If true, the connection should be closed after this request
-        # (after the response has been written in the server side,
-        # and after it has been read in the client)
-        self._disconnect_on_finish = False
-        self._clear_callbacks()
-        # Save the start lines after we read or write them; they
-        # affect later processing (e.g. 304 responses and HEAD methods
-        # have content-length but no bodies)
-        self._request_start_line = None  # type: Optional[httputil.RequestStartLine]
-        self._response_start_line = None  # type: Optional[httputil.ResponseStartLine]
-        self._request_headers = None  # type: Optional[httputil.HTTPHeaders]
-        # True if we are writing output with chunked encoding.
-        self._chunking_output = False
-        # While reading a body with a content-length, this is the
-        # amount left to read.
-        self._expected_content_remaining = None  # type: Optional[int]
-        # A Future for our outgoing writes, returned by IOStream.write.
-        self._pending_write = None  # type: Optional[Future[None]]
-
-    def read_response(self, delegate: httputil.HTTPMessageDelegate) -> Awaitable[bool]:
-        """Read a single HTTP response.
-
-        Typical client-mode usage is to write a request using `write_headers`,
-        `write`, and `finish`, and then call ``read_response``.
-
-        :arg delegate: a `.HTTPMessageDelegate`
-
-        Returns a `.Future` that resolves to a bool after the full response has
-        been read. The result is true if the stream is still open.
-        """
-        if self.params.decompress:
-            delegate = _GzipMessageDelegate(delegate, self.params.chunk_size)
-        return self._read_message(delegate)
-
-    async def _read_message(self, delegate: httputil.HTTPMessageDelegate) -> bool:
-        need_delegate_close = False
-        try:
-            header_future = self.stream.read_until_regex(
-                b"\r?\n\r?\n", max_bytes=self.params.max_header_size
-            )
-            if self.params.header_timeout is None:
-                header_data = await header_future
-            else:
-                try:
-                    header_data = await gen.with_timeout(
-                        self.stream.io_loop.time() + self.params.header_timeout,
-                        header_future,
-                        quiet_exceptions=iostream.StreamClosedError,
-                    )
-                except gen.TimeoutError:
-                    self.close()
-                    return False
-            start_line_str, headers = self._parse_headers(header_data)
-            if self.is_client:
-                resp_start_line = httputil.parse_response_start_line(start_line_str)
-                self._response_start_line = resp_start_line
-                start_line = (
-                    resp_start_line
-                )  # type: Union[httputil.RequestStartLine, httputil.ResponseStartLine]
-                # TODO: this will need to change to support client-side keepalive
-                self._disconnect_on_finish = False
-            else:
-                req_start_line = httputil.parse_request_start_line(start_line_str)
-                self._request_start_line = req_start_line
-                self._request_headers = headers
-                start_line = req_start_line
-                self._disconnect_on_finish = not self._can_keep_alive(
-                    req_start_line, headers
-                )
-            need_delegate_close = True
-            with _ExceptionLoggingContext(app_log):
-                header_recv_future = delegate.headers_received(start_line, headers)
-                if header_recv_future is not None:
-                    await header_recv_future
-            if self.stream is None:
-                # We've been detached.
-                need_delegate_close = False
-                return False
-            skip_body = False
-            if self.is_client:
-                assert isinstance(start_line, httputil.ResponseStartLine)
-                if (
-                    self._request_start_line is not None
-                    and self._request_start_line.method == "HEAD"
-                ):
-                    skip_body = True
-                code = start_line.code
-                if code == 304:
-                    # 304 responses may include the content-length header
-                    # but do not actually have a body.
-                    # http://tools.ietf.org/html/rfc7230#section-3.3
-                    skip_body = True
-                if code >= 100 and code < 200:
-                    # 1xx responses should never indicate the presence of
-                    # a body.
-                    if "Content-Length" in headers or "Transfer-Encoding" in headers:
-                        raise httputil.HTTPInputError(
-                            "Response code %d cannot have body" % code
-                        )
-                    # TODO: client delegates will get headers_received twice
-                    # in the case of a 100-continue.  Document or change?
-                    await self._read_message(delegate)
-            else:
-                if headers.get("Expect") == "100-continue" and not self._write_finished:
-                    self.stream.write(b"HTTP/1.1 100 (Continue)\r\n\r\n")
-            if not skip_body:
-                body_future = self._read_body(
-                    resp_start_line.code if self.is_client else 0, headers, delegate
-                )
-                if body_future is not None:
-                    if self._body_timeout is None:
-                        await body_future
-                    else:
-                        try:
-                            await gen.with_timeout(
-                                self.stream.io_loop.time() + self._body_timeout,
-                                body_future,
-                                quiet_exceptions=iostream.StreamClosedError,
-                            )
-                        except gen.TimeoutError:
-                            gen_log.info("Timeout reading body from %s", self.context)
-                            self.stream.close()
-                            return False
-            self._read_finished = True
-            if not self._write_finished or self.is_client:
-                need_delegate_close = False
-                with _ExceptionLoggingContext(app_log):
-                    delegate.finish()
-            # If we're waiting for the application to produce an asynchronous
-            # response, and we're not detached, register a close callback
-            # on the stream (we didn't need one while we were reading)
-            if (
-                not self._finish_future.done()
-                and self.stream is not None
-                and not self.stream.closed()
-            ):
-                self.stream.set_close_callback(self._on_connection_close)
-                await self._finish_future
-            if self.is_client and self._disconnect_on_finish:
-                self.close()
-            if self.stream is None:
-                return False
-        except httputil.HTTPInputError as e:
-            gen_log.info("Malformed HTTP message from %s: %s", self.context, e)
-            if not self.is_client:
-                await self.stream.write(b"HTTP/1.1 400 Bad Request\r\n\r\n")
-            self.close()
-            return False
-        finally:
-            if need_delegate_close:
-                with _ExceptionLoggingContext(app_log):
-                    delegate.on_connection_close()
-            header_future = None  # type: ignore
-            self._clear_callbacks()
-        return True
-
-    def _clear_callbacks(self) -> None:
-        """Clears the callback attributes.
-
-        This allows the request handler to be garbage collected more
-        quickly in CPython by breaking up reference cycles.
-        """
-        self._write_callback = None
-        self._write_future = None  # type: Optional[Future[None]]
-        self._close_callback = None  # type: Optional[Callable[[], None]]
-        if self.stream is not None:
-            self.stream.set_close_callback(None)
-
-    def set_close_callback(self, callback: Optional[Callable[[], None]]) -> None:
-        """Sets a callback that will be run when the connection is closed.
-
-        Note that this callback is slightly different from
-        `.HTTPMessageDelegate.on_connection_close`: The
-        `.HTTPMessageDelegate` method is called when the connection is
-        closed while recieving a message. This callback is used when
-        there is not an active delegate (for example, on the server
-        side this callback is used if the client closes the connection
-        after sending its request but before receiving all the
-        response.
-        """
-        self._close_callback = callback
-
-    def _on_connection_close(self) -> None:
-        # Note that this callback is only registered on the IOStream
-        # when we have finished reading the request and are waiting for
-        # the application to produce its response.
-        if self._close_callback is not None:
-            callback = self._close_callback
-            self._close_callback = None
-            callback()
-        if not self._finish_future.done():
-            future_set_result_unless_cancelled(self._finish_future, None)
-        self._clear_callbacks()
-
-    def close(self) -> None:
-        if self.stream is not None:
-            self.stream.close()
-        self._clear_callbacks()
-        if not self._finish_future.done():
-            future_set_result_unless_cancelled(self._finish_future, None)
-
-    def detach(self) -> iostream.IOStream:
-        """Take control of the underlying stream.
-
-        Returns the underlying `.IOStream` object and stops all further
-        HTTP processing.  May only be called during
-        `.HTTPMessageDelegate.headers_received`.  Intended for implementing
-        protocols like websockets that tunnel over an HTTP handshake.
-        """
-        self._clear_callbacks()
-        stream = self.stream
-        self.stream = None  # type: ignore
-        if not self._finish_future.done():
-            future_set_result_unless_cancelled(self._finish_future, None)
-        return stream
-
-    def set_body_timeout(self, timeout: float) -> None:
-        """Sets the body timeout for a single request.
-
-        Overrides the value from `.HTTP1ConnectionParameters`.
-        """
-        self._body_timeout = timeout
-
-    def set_max_body_size(self, max_body_size: int) -> None:
-        """Sets the body size limit for a single request.
-
-        Overrides the value from `.HTTP1ConnectionParameters`.
-        """
-        self._max_body_size = max_body_size
-
-    def write_headers(
-        self,
-        start_line: Union[httputil.RequestStartLine, httputil.ResponseStartLine],
-        headers: httputil.HTTPHeaders,
-        chunk: bytes = None,
-    ) -> "Future[None]":
-        """Implements `.HTTPConnection.write_headers`."""
-        lines = []
-        if self.is_client:
-            assert isinstance(start_line, httputil.RequestStartLine)
-            self._request_start_line = start_line
-            lines.append(utf8("%s %s HTTP/1.1" % (start_line[0], start_line[1])))
-            # Client requests with a non-empty body must have either a
-            # Content-Length or a Transfer-Encoding.
-            self._chunking_output = (
-                start_line.method in ("POST", "PUT", "PATCH")
-                and "Content-Length" not in headers
-                and (
-                    "Transfer-Encoding" not in headers
-                    or headers["Transfer-Encoding"] == "chunked"
-                )
-            )
-        else:
-            assert isinstance(start_line, httputil.ResponseStartLine)
-            assert self._request_start_line is not None
-            assert self._request_headers is not None
-            self._response_start_line = start_line
-            lines.append(utf8("HTTP/1.1 %d %s" % (start_line[1], start_line[2])))
-            self._chunking_output = (
-                # TODO: should this use
-                # self._request_start_line.version or
-                # start_line.version?
-                self._request_start_line.version == "HTTP/1.1"
-                # 1xx, 204 and 304 responses have no body (not even a zero-length
-                # body), and so should not have either Content-Length or
-                # Transfer-Encoding headers.
-                and start_line.code not in (204, 304)
-                and (start_line.code < 100 or start_line.code >= 200)
-                # No need to chunk the output if a Content-Length is specified.
-                and "Content-Length" not in headers
-                # Applications are discouraged from touching Transfer-Encoding,
-                # but if they do, leave it alone.
-                and "Transfer-Encoding" not in headers
-            )
-            # If connection to a 1.1 client will be closed, inform client
-            if (
-                self._request_start_line.version == "HTTP/1.1"
-                and self._disconnect_on_finish
-            ):
-                headers["Connection"] = "close"
-            # If a 1.0 client asked for keep-alive, add the header.
-            if (
-                self._request_start_line.version == "HTTP/1.0"
-                and self._request_headers.get("Connection", "").lower() == "keep-alive"
-            ):
-                headers["Connection"] = "Keep-Alive"
-        if self._chunking_output:
-            headers["Transfer-Encoding"] = "chunked"
-        if not self.is_client and (
-            self._request_start_line.method == "HEAD"
-            or cast(httputil.ResponseStartLine, start_line).code == 304
-        ):
-            self._expected_content_remaining = 0
-        elif "Content-Length" in headers:
-            self._expected_content_remaining = int(headers["Content-Length"])
-        else:
-            self._expected_content_remaining = None
-        # TODO: headers are supposed to be of type str, but we still have some
-        # cases that let bytes slip through. Remove these native_str calls when those
-        # are fixed.
-        header_lines = (
-            native_str(n) + ": " + native_str(v) for n, v in headers.get_all()
-        )
-        lines.extend(l.encode("latin1") for l in header_lines)
-        for line in lines:
-            if b"\n" in line:
-                raise ValueError("Newline in header: " + repr(line))
-        future = None
-        if self.stream.closed():
-            future = self._write_future = Future()
-            future.set_exception(iostream.StreamClosedError())
-            future.exception()
-        else:
-            future = self._write_future = Future()
-            data = b"\r\n".join(lines) + b"\r\n\r\n"
-            if chunk:
-                data += self._format_chunk(chunk)
-            self._pending_write = self.stream.write(data)
-            future_add_done_callback(self._pending_write, self._on_write_complete)
-        return future
-
-    def _format_chunk(self, chunk: bytes) -> bytes:
-        if self._expected_content_remaining is not None:
-            self._expected_content_remaining -= len(chunk)
-            if self._expected_content_remaining < 0:
-                # Close the stream now to stop further framing errors.
-                self.stream.close()
-                raise httputil.HTTPOutputError(
-                    "Tried to write more data than Content-Length"
-                )
-        if self._chunking_output and chunk:
-            # Don't write out empty chunks because that means END-OF-STREAM
-            # with chunked encoding
-            return utf8("%x" % len(chunk)) + b"\r\n" + chunk + b"\r\n"
-        else:
-            return chunk
-
-    def write(self, chunk: bytes) -> "Future[None]":
-        """Implements `.HTTPConnection.write`.
-
-        For backwards compatibility it is allowed but deprecated to
-        skip `write_headers` and instead call `write()` with a
-        pre-encoded header block.
-        """
-        future = None
-        if self.stream.closed():
-            future = self._write_future = Future()
-            self._write_future.set_exception(iostream.StreamClosedError())
-            self._write_future.exception()
-        else:
-            future = self._write_future = Future()
-            self._pending_write = self.stream.write(self._format_chunk(chunk))
-            future_add_done_callback(self._pending_write, self._on_write_complete)
-        return future
-
-    def finish(self) -> None:
-        """Implements `.HTTPConnection.finish`."""
-        if (
-            self._expected_content_remaining is not None
-            and self._expected_content_remaining != 0
-            and not self.stream.closed()
-        ):
-            self.stream.close()
-            raise httputil.HTTPOutputError(
-                "Tried to write %d bytes less than Content-Length"
-                % self._expected_content_remaining
-            )
-        if self._chunking_output:
-            if not self.stream.closed():
-                self._pending_write = self.stream.write(b"0\r\n\r\n")
-                self._pending_write.add_done_callback(self._on_write_complete)
-        self._write_finished = True
-        # If the app finished the request while we're still reading,
-        # divert any remaining data away from the delegate and
-        # close the connection when we're done sending our response.
-        # Closing the connection is the only way to avoid reading the
-        # whole input body.
-        if not self._read_finished:
-            self._disconnect_on_finish = True
-        # No more data is coming, so instruct TCP to send any remaining
-        # data immediately instead of waiting for a full packet or ack.
-        self.stream.set_nodelay(True)
-        if self._pending_write is None:
-            self._finish_request(None)
-        else:
-            future_add_done_callback(self._pending_write, self._finish_request)
-
-    def _on_write_complete(self, future: "Future[None]") -> None:
-        exc = future.exception()
-        if exc is not None and not isinstance(exc, iostream.StreamClosedError):
-            future.result()
-        if self._write_callback is not None:
-            callback = self._write_callback
-            self._write_callback = None
-            self.stream.io_loop.add_callback(callback)
-        if self._write_future is not None:
-            future = self._write_future
-            self._write_future = None
-            future_set_result_unless_cancelled(future, None)
-
-    def _can_keep_alive(
-        self, start_line: httputil.RequestStartLine, headers: httputil.HTTPHeaders
-    ) -> bool:
-        if self.params.no_keep_alive:
-            return False
-        connection_header = headers.get("Connection")
-        if connection_header is not None:
-            connection_header = connection_header.lower()
-        if start_line.version == "HTTP/1.1":
-            return connection_header != "close"
-        elif (
-            "Content-Length" in headers
-            or headers.get("Transfer-Encoding", "").lower() == "chunked"
-            or getattr(start_line, "method", None) in ("HEAD", "GET")
-        ):
-            # start_line may be a request or response start line; only
-            # the former has a method attribute.
-            return connection_header == "keep-alive"
-        return False
-
-    def _finish_request(self, future: "Optional[Future[None]]") -> None:
-        self._clear_callbacks()
-        if not self.is_client and self._disconnect_on_finish:
-            self.close()
-            return
-        # Turn Nagle's algorithm back on, leaving the stream in its
-        # default state for the next request.
-        self.stream.set_nodelay(False)
-        if not self._finish_future.done():
-            future_set_result_unless_cancelled(self._finish_future, None)
-
-    def _parse_headers(self, data: bytes) -> Tuple[str, httputil.HTTPHeaders]:
-        # The lstrip removes newlines that some implementations sometimes
-        # insert between messages of a reused connection.  Per RFC 7230,
-        # we SHOULD ignore at least one empty line before the request.
-        # http://tools.ietf.org/html/rfc7230#section-3.5
-        data_str = native_str(data.decode("latin1")).lstrip("\r\n")
-        # RFC 7230 section allows for both CRLF and bare LF.
-        eol = data_str.find("\n")
-        start_line = data_str[:eol].rstrip("\r")
-        headers = httputil.HTTPHeaders.parse(data_str[eol:])
-        return start_line, headers
-
-    def _read_body(
-        self,
-        code: int,
-        headers: httputil.HTTPHeaders,
-        delegate: httputil.HTTPMessageDelegate,
-    ) -> Optional[Awaitable[None]]:
-        if "Content-Length" in headers:
-            if "Transfer-Encoding" in headers:
-                # Response cannot contain both Content-Length and
-                # Transfer-Encoding headers.
-                # http://tools.ietf.org/html/rfc7230#section-3.3.3
-                raise httputil.HTTPInputError(
-                    "Response with both Transfer-Encoding and Content-Length"
-                )
-            if "," in headers["Content-Length"]:
-                # Proxies sometimes cause Content-Length headers to get
-                # duplicated.  If all the values are identical then we can
-                # use them but if they differ it's an error.
-                pieces = re.split(r",\s*", headers["Content-Length"])
-                if any(i != pieces[0] for i in pieces):
-                    raise httputil.HTTPInputError(
-                        "Multiple unequal Content-Lengths: %r"
-                        % headers["Content-Length"]
-                    )
-                headers["Content-Length"] = pieces[0]
-
-            try:
-                content_length = int(headers["Content-Length"])  # type: Optional[int]
-            except ValueError:
-                # Handles non-integer Content-Length value.
-                raise httputil.HTTPInputError(
-                    "Only integer Content-Length is allowed: %s"
-                    % headers["Content-Length"]
-                )
-
-            if cast(int, content_length) > self._max_body_size:
-                raise httputil.HTTPInputError("Content-Length too long")
-        else:
-            content_length = None
-
-        if code == 204:
-            # This response code is not allowed to have a non-empty body,
-            # and has an implicit length of zero instead of read-until-close.
-            # http://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html#sec4.3
-            if "Transfer-Encoding" in headers or content_length not in (None, 0):
-                raise httputil.HTTPInputError(
-                    "Response with code %d should not have body" % code
-                )
-            content_length = 0
-
-        if content_length is not None:
-            return self._read_fixed_body(content_length, delegate)
-        if headers.get("Transfer-Encoding", "").lower() == "chunked":
-            return self._read_chunked_body(delegate)
-        if self.is_client:
-            return self._read_body_until_close(delegate)
-        return None
-
-    async def _read_fixed_body(
-        self, content_length: int, delegate: httputil.HTTPMessageDelegate
-    ) -> None:
-        while content_length > 0:
-            body = await self.stream.read_bytes(
-                min(self.params.chunk_size, content_length), partial=True
-            )
-            content_length -= len(body)
-            if not self._write_finished or self.is_client:
-                with _ExceptionLoggingContext(app_log):
-                    ret = delegate.data_received(body)
-                    if ret is not None:
-                        await ret
-
-    async def _read_chunked_body(self, delegate: httputil.HTTPMessageDelegate) -> None:
-        # TODO: "chunk extensions" http://tools.ietf.org/html/rfc2616#section-3.6.1
-        total_size = 0
-        while True:
-            chunk_len_str = await self.stream.read_until(b"\r\n", max_bytes=64)
-            chunk_len = int(chunk_len_str.strip(), 16)
-            if chunk_len == 0:
-                crlf = await self.stream.read_bytes(2)
-                if crlf != b"\r\n":
-                    raise httputil.HTTPInputError(
-                        "improperly terminated chunked request"
-                    )
-                return
-            total_size += chunk_len
-            if total_size > self._max_body_size:
-                raise httputil.HTTPInputError("chunked body too large")
-            bytes_to_read = chunk_len
-            while bytes_to_read:
-                chunk = await self.stream.read_bytes(
-                    min(bytes_to_read, self.params.chunk_size), partial=True
-                )
-                bytes_to_read -= len(chunk)
-                if not self._write_finished or self.is_client:
-                    with _ExceptionLoggingContext(app_log):
-                        ret = delegate.data_received(chunk)
-                        if ret is not None:
-                            await ret
-            # chunk ends with \r\n
-            crlf = await self.stream.read_bytes(2)
-            assert crlf == b"\r\n"
-
-    async def _read_body_until_close(
-        self, delegate: httputil.HTTPMessageDelegate
-    ) -> None:
-        body = await self.stream.read_until_close()
-        if not self._write_finished or self.is_client:
-            with _ExceptionLoggingContext(app_log):
-                ret = delegate.data_received(body)
-                if ret is not None:
-                    await ret
-
-
-class _GzipMessageDelegate(httputil.HTTPMessageDelegate):
-    """Wraps an `HTTPMessageDelegate` to decode ``Content-Encoding: gzip``.
-    """
-
-    def __init__(self, delegate: httputil.HTTPMessageDelegate, chunk_size: int) -> None:
-        self._delegate = delegate
-        self._chunk_size = chunk_size
-        self._decompressor = None  # type: Optional[GzipDecompressor]
-
-    def headers_received(
-        self,
-        start_line: Union[httputil.RequestStartLine, httputil.ResponseStartLine],
-        headers: httputil.HTTPHeaders,
-    ) -> Optional[Awaitable[None]]:
-        if headers.get("Content-Encoding") == "gzip":
-            self._decompressor = GzipDecompressor()
-            # Downstream delegates will only see uncompressed data,
-            # so rename the content-encoding header.
-            # (but note that curl_httpclient doesn't do this).
-            headers.add("X-Consumed-Content-Encoding", headers["Content-Encoding"])
-            del headers["Content-Encoding"]
-        return self._delegate.headers_received(start_line, headers)
-
-    async def data_received(self, chunk: bytes) -> None:
-        if self._decompressor:
-            compressed_data = chunk
-            while compressed_data:
-                decompressed = self._decompressor.decompress(
-                    compressed_data, self._chunk_size
-                )
-                if decompressed:
-                    ret = self._delegate.data_received(decompressed)
-                    if ret is not None:
-                        await ret
-                compressed_data = self._decompressor.unconsumed_tail
-        else:
-            ret = self._delegate.data_received(chunk)
-            if ret is not None:
-                await ret
-
-    def finish(self) -> None:
-        if self._decompressor is not None:
-            tail = self._decompressor.flush()
-            if tail:
-                # The tail should always be empty: decompress returned
-                # all that it can in data_received and the only
-                # purpose of the flush call is to detect errors such
-                # as truncated input. If we did legitimately get a new
-                # chunk at this point we'd need to change the
-                # interface to make finish() a coroutine.
-                raise ValueError(
-                    "decompressor.flush returned data; possile truncated input"
-                )
-        return self._delegate.finish()
-
-    def on_connection_close(self) -> None:
-        return self._delegate.on_connection_close()
-
-
-class HTTP1ServerConnection(object):
-    """An HTTP/1.x server."""
-
-    def __init__(
-        self,
-        stream: iostream.IOStream,
-        params: HTTP1ConnectionParameters = None,
-        context: object = None,
-    ) -> None:
-        """
-        :arg stream: an `.IOStream`
-        :arg params: a `.HTTP1ConnectionParameters` or None
-        :arg context: an opaque application-defined object that is accessible
-            as ``connection.context``
-        """
-        self.stream = stream
-        if params is None:
-            params = HTTP1ConnectionParameters()
-        self.params = params
-        self.context = context
-        self._serving_future = None  # type: Optional[Future[None]]
-
-    async def close(self) -> None:
-        """Closes the connection.
-
-        Returns a `.Future` that resolves after the serving loop has exited.
-        """
-        self.stream.close()
-        # Block until the serving loop is done, but ignore any exceptions
-        # (start_serving is already responsible for logging them).
-        assert self._serving_future is not None
-        try:
-            await self._serving_future
-        except Exception:
-            pass
-
-    def start_serving(self, delegate: httputil.HTTPServerConnectionDelegate) -> None:
-        """Starts serving requests on this connection.
-
-        :arg delegate: a `.HTTPServerConnectionDelegate`
-        """
-        assert isinstance(delegate, httputil.HTTPServerConnectionDelegate)
-        fut = gen.convert_yielded(self._server_request_loop(delegate))
-        self._serving_future = fut
-        # Register the future on the IOLoop so its errors get logged.
-        self.stream.io_loop.add_future(fut, lambda f: f.result())
-
-    async def _server_request_loop(
-        self, delegate: httputil.HTTPServerConnectionDelegate
-    ) -> None:
-        try:
-            while True:
-                conn = HTTP1Connection(self.stream, False, self.params, self.context)
-                request_delegate = delegate.start_request(self, conn)
-                try:
-                    ret = await conn.read_response(request_delegate)
-                except (
-                    iostream.StreamClosedError,
-                    iostream.UnsatisfiableReadError,
-                    asyncio.CancelledError,
-                ):
-                    return
-                except _QuietException:
-                    # This exception was already logged.
-                    conn.close()
-                    return
-                except Exception:
-                    gen_log.error("Uncaught exception", exc_info=True)
-                    conn.close()
-                    return
-                if not ret:
-                    return
-                await asyncio.sleep(0)
-        finally:
-            delegate.on_close(self)
diff --git a/venv/lib/python3.7/site-packages/tornado/httpclient.py b/venv/lib/python3.7/site-packages/tornado/httpclient.py
deleted file mode 100644
index 882600a..0000000
--- a/venv/lib/python3.7/site-packages/tornado/httpclient.py
+++ /dev/null
@@ -1,781 +0,0 @@
-"""Blocking and non-blocking HTTP client interfaces.
-
-This module defines a common interface shared by two implementations,
-``simple_httpclient`` and ``curl_httpclient``.  Applications may either
-instantiate their chosen implementation class directly or use the
-`AsyncHTTPClient` class from this module, which selects an implementation
-that can be overridden with the `AsyncHTTPClient.configure` method.
-
-The default implementation is ``simple_httpclient``, and this is expected
-to be suitable for most users' needs.  However, some applications may wish
-to switch to ``curl_httpclient`` for reasons such as the following:
-
-* ``curl_httpclient`` has some features not found in ``simple_httpclient``,
-  including support for HTTP proxies and the ability to use a specified
-  network interface.
-
-* ``curl_httpclient`` is more likely to be compatible with sites that are
-  not-quite-compliant with the HTTP spec, or sites that use little-exercised
-  features of HTTP.
-
-* ``curl_httpclient`` is faster.
-
-Note that if you are using ``curl_httpclient``, it is highly
-recommended that you use a recent version of ``libcurl`` and
-``pycurl``.  Currently the minimum supported version of libcurl is
-7.22.0, and the minimum version of pycurl is 7.18.2.  It is highly
-recommended that your ``libcurl`` installation is built with
-asynchronous DNS resolver (threaded or c-ares), otherwise you may
-encounter various problems with request timeouts (for more
-information, see
-http://curl.haxx.se/libcurl/c/curl_easy_setopt.html#CURLOPTCONNECTTIMEOUTMS
-and comments in curl_httpclient.py).
-
-To select ``curl_httpclient``, call `AsyncHTTPClient.configure` at startup::
-
-    AsyncHTTPClient.configure("tornado.curl_httpclient.CurlAsyncHTTPClient")
-"""
-
-import datetime
-import functools
-from io import BytesIO
-import ssl
-import time
-import weakref
-
-from tornado.concurrent import (
-    Future,
-    future_set_result_unless_cancelled,
-    future_set_exception_unless_cancelled,
-)
-from tornado.escape import utf8, native_str
-from tornado import gen, httputil
-from tornado.ioloop import IOLoop
-from tornado.util import Configurable
-
-from typing import Type, Any, Union, Dict, Callable, Optional, cast, Awaitable
-
-
-class HTTPClient(object):
-    """A blocking HTTP client.
-
-    This interface is provided to make it easier to share code between
-    synchronous and asynchronous applications. Applications that are
-    running an `.IOLoop` must use `AsyncHTTPClient` instead.
-
-    Typical usage looks like this::
-
-        http_client = httpclient.HTTPClient()
-        try:
-            response = http_client.fetch("http://www.google.com/")
-            print(response.body)
-        except httpclient.HTTPError as e:
-            # HTTPError is raised for non-200 responses; the response
-            # can be found in e.response.
-            print("Error: " + str(e))
-        except Exception as e:
-            # Other errors are possible, such as IOError.
-            print("Error: " + str(e))
-        http_client.close()
-
-    .. versionchanged:: 5.0
-
-       Due to limitations in `asyncio`, it is no longer possible to
-       use the synchronous ``HTTPClient`` while an `.IOLoop` is running.
-       Use `AsyncHTTPClient` instead.
-
-    """
-
-    def __init__(
-        self, async_client_class: Type["AsyncHTTPClient"] = None, **kwargs: Any
-    ) -> None:
-        # Initialize self._closed at the beginning of the constructor
-        # so that an exception raised here doesn't lead to confusing
-        # failures in __del__.
-        self._closed = True
-        self._io_loop = IOLoop(make_current=False)
-        if async_client_class is None:
-            async_client_class = AsyncHTTPClient
-
-        # Create the client while our IOLoop is "current", without
-        # clobbering the thread's real current IOLoop (if any).
-        async def make_client() -> "AsyncHTTPClient":
-            await gen.sleep(0)
-            assert async_client_class is not None
-            return async_client_class(**kwargs)
-
-        self._async_client = self._io_loop.run_sync(make_client)
-        self._closed = False
-
-    def __del__(self) -> None:
-        self.close()
-
-    def close(self) -> None:
-        """Closes the HTTPClient, freeing any resources used."""
-        if not self._closed:
-            self._async_client.close()
-            self._io_loop.close()
-            self._closed = True
-
-    def fetch(
-        self, request: Union["HTTPRequest", str], **kwargs: Any
-    ) -> "HTTPResponse":
-        """Executes a request, returning an `HTTPResponse`.
-
-        The request may be either a string URL or an `HTTPRequest` object.
-        If it is a string, we construct an `HTTPRequest` using any additional
-        kwargs: ``HTTPRequest(request, **kwargs)``
-
-        If an error occurs during the fetch, we raise an `HTTPError` unless
-        the ``raise_error`` keyword argument is set to False.
-        """
-        response = self._io_loop.run_sync(
-            functools.partial(self._async_client.fetch, request, **kwargs)
-        )
-        return response
-
-
-class AsyncHTTPClient(Configurable):
-    """An non-blocking HTTP client.
-
-    Example usage::
-
-        async def f():
-            http_client = AsyncHTTPClient()
-            try:
-                response = await http_client.fetch("http://www.google.com")
-            except Exception as e:
-                print("Error: %s" % e)
-            else:
-                print(response.body)
-
-    The constructor for this class is magic in several respects: It
-    actually creates an instance of an implementation-specific
-    subclass, and instances are reused as a kind of pseudo-singleton
-    (one per `.IOLoop`). The keyword argument ``force_instance=True``
-    can be used to suppress this singleton behavior. Unless
-    ``force_instance=True`` is used, no arguments should be passed to
-    the `AsyncHTTPClient` constructor. The implementation subclass as
-    well as arguments to its constructor can be set with the static
-    method `configure()`
-
-    All `AsyncHTTPClient` implementations support a ``defaults``
-    keyword argument, which can be used to set default values for
-    `HTTPRequest` attributes.  For example::
-
-        AsyncHTTPClient.configure(
-            None, defaults=dict(user_agent="MyUserAgent"))
-        # or with force_instance:
-        client = AsyncHTTPClient(force_instance=True,
-            defaults=dict(user_agent="MyUserAgent"))
-
-    .. versionchanged:: 5.0
-       The ``io_loop`` argument (deprecated since version 4.1) has been removed.
-
-    """
-
-    _instance_cache = None  # type: Dict[IOLoop, AsyncHTTPClient]
-
-    @classmethod
-    def configurable_base(cls) -> Type[Configurable]:
-        return AsyncHTTPClient
-
-    @classmethod
-    def configurable_default(cls) -> Type[Configurable]:
-        from tornado.simple_httpclient import SimpleAsyncHTTPClient
-
-        return SimpleAsyncHTTPClient
-
-    @classmethod
-    def _async_clients(cls) -> Dict[IOLoop, "AsyncHTTPClient"]:
-        attr_name = "_async_client_dict_" + cls.__name__
-        if not hasattr(cls, attr_name):
-            setattr(cls, attr_name, weakref.WeakKeyDictionary())
-        return getattr(cls, attr_name)
-
-    def __new__(cls, force_instance: bool = False, **kwargs: Any) -> "AsyncHTTPClient":
-        io_loop = IOLoop.current()
-        if force_instance:
-            instance_cache = None
-        else:
-            instance_cache = cls._async_clients()
-        if instance_cache is not None and io_loop in instance_cache:
-            return instance_cache[io_loop]
-        instance = super(AsyncHTTPClient, cls).__new__(cls, **kwargs)  # type: ignore
-        # Make sure the instance knows which cache to remove itself from.
-        # It can't simply call _async_clients() because we may be in
-        # __new__(AsyncHTTPClient) but instance.__class__ may be
-        # SimpleAsyncHTTPClient.
-        instance._instance_cache = instance_cache
-        if instance_cache is not None:
-            instance_cache[instance.io_loop] = instance
-        return instance
-
-    def initialize(self, defaults: Dict[str, Any] = None) -> None:
-        self.io_loop = IOLoop.current()
-        self.defaults = dict(HTTPRequest._DEFAULTS)
-        if defaults is not None:
-            self.defaults.update(defaults)
-        self._closed = False
-
-    def close(self) -> None:
-        """Destroys this HTTP client, freeing any file descriptors used.
-
-        This method is **not needed in normal use** due to the way
-        that `AsyncHTTPClient` objects are transparently reused.
-        ``close()`` is generally only necessary when either the
-        `.IOLoop` is also being closed, or the ``force_instance=True``
-        argument was used when creating the `AsyncHTTPClient`.
-
-        No other methods may be called on the `AsyncHTTPClient` after
-        ``close()``.
-
-        """
-        if self._closed:
-            return
-        self._closed = True
-        if self._instance_cache is not None:
-            cached_val = self._instance_cache.pop(self.io_loop, None)
-            # If there's an object other than self in the instance
-            # cache for our IOLoop, something has gotten mixed up. A
-            # value of None appears to be possible when this is called
-            # from a destructor (HTTPClient.__del__) as the weakref
-            # gets cleared before the destructor runs.
-            if cached_val is not None and cached_val is not self:
-                raise RuntimeError("inconsistent AsyncHTTPClient cache")
-
-    def fetch(
-        self,
-        request: Union[str, "HTTPRequest"],
-        raise_error: bool = True,
-        **kwargs: Any
-    ) -> Awaitable["HTTPResponse"]:
-        """Executes a request, asynchronously returning an `HTTPResponse`.
-
-        The request may be either a string URL or an `HTTPRequest` object.
-        If it is a string, we construct an `HTTPRequest` using any additional
-        kwargs: ``HTTPRequest(request, **kwargs)``
-
-        This method returns a `.Future` whose result is an
-        `HTTPResponse`. By default, the ``Future`` will raise an
-        `HTTPError` if the request returned a non-200 response code
-        (other errors may also be raised if the server could not be
-        contacted). Instead, if ``raise_error`` is set to False, the
-        response will always be returned regardless of the response
-        code.
-
-        If a ``callback`` is given, it will be invoked with the `HTTPResponse`.
-        In the callback interface, `HTTPError` is not automatically raised.
-        Instead, you must check the response's ``error`` attribute or
-        call its `~HTTPResponse.rethrow` method.
-
-        .. versionchanged:: 6.0
-
-           The ``callback`` argument was removed. Use the returned
-           `.Future` instead.
-
-           The ``raise_error=False`` argument only affects the
-           `HTTPError` raised when a non-200 response code is used,
-           instead of suppressing all errors.
-        """
-        if self._closed:
-            raise RuntimeError("fetch() called on closed AsyncHTTPClient")
-        if not isinstance(request, HTTPRequest):
-            request = HTTPRequest(url=request, **kwargs)
-        else:
-            if kwargs:
-                raise ValueError(
-                    "kwargs can't be used if request is an HTTPRequest object"
-                )
-        # We may modify this (to add Host, Accept-Encoding, etc),
-        # so make sure we don't modify the caller's object.  This is also
-        # where normal dicts get converted to HTTPHeaders objects.
-        request.headers = httputil.HTTPHeaders(request.headers)
-        request_proxy = _RequestProxy(request, self.defaults)
-        future = Future()  # type: Future[HTTPResponse]
-
-        def handle_response(response: "HTTPResponse") -> None:
-            if response.error:
-                if raise_error or not response._error_is_response_code:
-                    future_set_exception_unless_cancelled(future, response.error)
-                    return
-            future_set_result_unless_cancelled(future, response)
-
-        self.fetch_impl(cast(HTTPRequest, request_proxy), handle_response)
-        return future
-
-    def fetch_impl(
-        self, request: "HTTPRequest", callback: Callable[["HTTPResponse"], None]
-    ) -> None:
-        raise NotImplementedError()
-
-    @classmethod
-    def configure(
-        cls, impl: "Union[None, str, Type[Configurable]]", **kwargs: Any
-    ) -> None:
-        """Configures the `AsyncHTTPClient` subclass to use.
-
-        ``AsyncHTTPClient()`` actually creates an instance of a subclass.
-        This method may be called with either a class object or the
-        fully-qualified name of such a class (or ``None`` to use the default,
-        ``SimpleAsyncHTTPClient``)
-
-        If additional keyword arguments are given, they will be passed
-        to the constructor of each subclass instance created.  The
-        keyword argument ``max_clients`` determines the maximum number
-        of simultaneous `~AsyncHTTPClient.fetch()` operations that can
-        execute in parallel on each `.IOLoop`.  Additional arguments
-        may be supported depending on the implementation class in use.
-
-        Example::
-
-           AsyncHTTPClient.configure("tornado.curl_httpclient.CurlAsyncHTTPClient")
-        """
-        super(AsyncHTTPClient, cls).configure(impl, **kwargs)
-
-
-class HTTPRequest(object):
-    """HTTP client request object."""
-
-    _headers = None  # type: Union[Dict[str, str], httputil.HTTPHeaders]
-
-    # Default values for HTTPRequest parameters.
-    # Merged with the values on the request object by AsyncHTTPClient
-    # implementations.
-    _DEFAULTS = dict(
-        connect_timeout=20.0,
-        request_timeout=20.0,
-        follow_redirects=True,
-        max_redirects=5,
-        decompress_response=True,
-        proxy_password="",
-        allow_nonstandard_methods=False,
-        validate_cert=True,
-    )
-
-    def __init__(
-        self,
-        url: str,
-        method: str = "GET",
-        headers: Union[Dict[str, str], httputil.HTTPHeaders] = None,
-        body: Union[bytes, str] = None,
-        auth_username: str = None,
-        auth_password: str = None,
-        auth_mode: str = None,
-        connect_timeout: float = None,
-        request_timeout: float = None,
-        if_modified_since: Union[float, datetime.datetime] = None,
-        follow_redirects: bool = None,
-        max_redirects: int = None,
-        user_agent: str = None,
-        use_gzip: bool = None,
-        network_interface: str = None,
-        streaming_callback: Callable[[bytes], None] = None,
-        header_callback: Callable[[str], None] = None,
-        prepare_curl_callback: Callable[[Any], None] = None,
-        proxy_host: str = None,
-        proxy_port: int = None,
-        proxy_username: str = None,
-        proxy_password: str = None,
-        proxy_auth_mode: str = None,
-        allow_nonstandard_methods: bool = None,
-        validate_cert: bool = None,
-        ca_certs: str = None,
-        allow_ipv6: bool = None,
-        client_key: str = None,
-        client_cert: str = None,
-        body_producer: Callable[[Callable[[bytes], None]], "Future[None]"] = None,
-        expect_100_continue: bool = False,
-        decompress_response: bool = None,
-        ssl_options: Union[Dict[str, Any], ssl.SSLContext] = None,
-    ) -> None:
-        r"""All parameters except ``url`` are optional.
-
-        :arg str url: URL to fetch
-        :arg str method: HTTP method, e.g. "GET" or "POST"
-        :arg headers: Additional HTTP headers to pass on the request
-        :type headers: `~tornado.httputil.HTTPHeaders` or `dict`
-        :arg body: HTTP request body as a string (byte or unicode; if unicode
-           the utf-8 encoding will be used)
-        :arg body_producer: Callable used for lazy/asynchronous request bodies.
-           It is called with one argument, a ``write`` function, and should
-           return a `.Future`.  It should call the write function with new
-           data as it becomes available.  The write function returns a
-           `.Future` which can be used for flow control.
-           Only one of ``body`` and ``body_producer`` may
-           be specified.  ``body_producer`` is not supported on
-           ``curl_httpclient``.  When using ``body_producer`` it is recommended
-           to pass a ``Content-Length`` in the headers as otherwise chunked
-           encoding will be used, and many servers do not support chunked
-           encoding on requests.  New in Tornado 4.0
-        :arg str auth_username: Username for HTTP authentication
-        :arg str auth_password: Password for HTTP authentication
-        :arg str auth_mode: Authentication mode; default is "basic".
-           Allowed values are implementation-defined; ``curl_httpclient``
-           supports "basic" and "digest"; ``simple_httpclient`` only supports
-           "basic"
-        :arg float connect_timeout: Timeout for initial connection in seconds,
-           default 20 seconds
-        :arg float request_timeout: Timeout for entire request in seconds,
-           default 20 seconds
-        :arg if_modified_since: Timestamp for ``If-Modified-Since`` header
-        :type if_modified_since: `datetime` or `float`
-        :arg bool follow_redirects: Should redirects be followed automatically
-           or return the 3xx response? Default True.
-        :arg int max_redirects: Limit for ``follow_redirects``, default 5.
-        :arg str user_agent: String to send as ``User-Agent`` header
-        :arg bool decompress_response: Request a compressed response from
-           the server and decompress it after downloading.  Default is True.
-           New in Tornado 4.0.
-        :arg bool use_gzip: Deprecated alias for ``decompress_response``
-           since Tornado 4.0.
-        :arg str network_interface: Network interface or source IP to use for request.
-           See ``curl_httpclient`` note below.
-        :arg collections.abc.Callable streaming_callback: If set, ``streaming_callback`` will
-           be run with each chunk of data as it is received, and
-           ``HTTPResponse.body`` and ``HTTPResponse.buffer`` will be empty in
-           the final response.
-        :arg collections.abc.Callable header_callback: If set, ``header_callback`` will
-           be run with each header line as it is received (including the
-           first line, e.g. ``HTTP/1.0 200 OK\r\n``, and a final line
-           containing only ``\r\n``.  All lines include the trailing newline
-           characters).  ``HTTPResponse.headers`` will be empty in the final
-           response.  This is most useful in conjunction with
-           ``streaming_callback``, because it's the only way to get access to
-           header data while the request is in progress.
-        :arg collections.abc.Callable prepare_curl_callback: If set, will be called with
-           a ``pycurl.Curl`` object to allow the application to make additional
-           ``setopt`` calls.
-        :arg str proxy_host: HTTP proxy hostname.  To use proxies,
-           ``proxy_host`` and ``proxy_port`` must be set; ``proxy_username``,
-           ``proxy_pass`` and ``proxy_auth_mode`` are optional.  Proxies are
-           currently only supported with ``curl_httpclient``.
-        :arg int proxy_port: HTTP proxy port
-        :arg str proxy_username: HTTP proxy username
-        :arg str proxy_password: HTTP proxy password
-        :arg str proxy_auth_mode: HTTP proxy Authentication mode;
-           default is "basic". supports "basic" and "digest"
-        :arg bool allow_nonstandard_methods: Allow unknown values for ``method``
-           argument? Default is False.
-        :arg bool validate_cert: For HTTPS requests, validate the server's
-           certificate? Default is True.
-        :arg str ca_certs: filename of CA certificates in PEM format,
-           or None to use defaults.  See note below when used with
-           ``curl_httpclient``.
-        :arg str client_key: Filename for client SSL key, if any.  See
-           note below when used with ``curl_httpclient``.
-        :arg str client_cert: Filename for client SSL certificate, if any.
-           See note below when used with ``curl_httpclient``.
-        :arg ssl.SSLContext ssl_options: `ssl.SSLContext` object for use in
-           ``simple_httpclient`` (unsupported by ``curl_httpclient``).
-           Overrides ``validate_cert``, ``ca_certs``, ``client_key``,
-           and ``client_cert``.
-        :arg bool allow_ipv6: Use IPv6 when available?  Default is True.
-        :arg bool expect_100_continue: If true, send the
-           ``Expect: 100-continue`` header and wait for a continue response
-           before sending the request body.  Only supported with
-           ``simple_httpclient``.
-
-        .. note::
-
-            When using ``curl_httpclient`` certain options may be
-            inherited by subsequent fetches because ``pycurl`` does
-            not allow them to be cleanly reset.  This applies to the
-            ``ca_certs``, ``client_key``, ``client_cert``, and
-            ``network_interface`` arguments.  If you use these
-            options, you should pass them on every request (you don't
-            have to always use the same values, but it's not possible
-            to mix requests that specify these options with ones that
-            use the defaults).
-
-        .. versionadded:: 3.1
-           The ``auth_mode`` argument.
-
-        .. versionadded:: 4.0
-           The ``body_producer`` and ``expect_100_continue`` arguments.
-
-        .. versionadded:: 4.2
-           The ``ssl_options`` argument.
-
-        .. versionadded:: 4.5
-           The ``proxy_auth_mode`` argument.
-        """
-        # Note that some of these attributes go through property setters
-        # defined below.
-        self.headers = headers
-        if if_modified_since:
-            self.headers["If-Modified-Since"] = httputil.format_timestamp(
-                if_modified_since
-            )
-        self.proxy_host = proxy_host
-        self.proxy_port = proxy_port
-        self.proxy_username = proxy_username
-        self.proxy_password = proxy_password
-        self.proxy_auth_mode = proxy_auth_mode
-        self.url = url
-        self.method = method
-        self.body = body
-        self.body_producer = body_producer
-        self.auth_username = auth_username
-        self.auth_password = auth_password
-        self.auth_mode = auth_mode
-        self.connect_timeout = connect_timeout
-        self.request_timeout = request_timeout
-        self.follow_redirects = follow_redirects
-        self.max_redirects = max_redirects
-        self.user_agent = user_agent
-        if decompress_response is not None:
-            self.decompress_response = decompress_response  # type: Optional[bool]
-        else:
-            self.decompress_response = use_gzip
-        self.network_interface = network_interface
-        self.streaming_callback = streaming_callback
-        self.header_callback = header_callback
-        self.prepare_curl_callback = prepare_curl_callback
-        self.allow_nonstandard_methods = allow_nonstandard_methods
-        self.validate_cert = validate_cert
-        self.ca_certs = ca_certs
-        self.allow_ipv6 = allow_ipv6
-        self.client_key = client_key
-        self.client_cert = client_cert
-        self.ssl_options = ssl_options
-        self.expect_100_continue = expect_100_continue
-        self.start_time = time.time()
-
-    @property
-    def headers(self) -> httputil.HTTPHeaders:
-        # TODO: headers may actually be a plain dict until fairly late in
-        # the process (AsyncHTTPClient.fetch), but practically speaking,
-        # whenever the property is used they're already HTTPHeaders.
-        return self._headers  # type: ignore
-
-    @headers.setter
-    def headers(self, value: Union[Dict[str, str], httputil.HTTPHeaders]) -> None:
-        if value is None:
-            self._headers = httputil.HTTPHeaders()
-        else:
-            self._headers = value  # type: ignore
-
-    @property
-    def body(self) -> bytes:
-        return self._body
-
-    @body.setter
-    def body(self, value: Union[bytes, str]) -> None:
-        self._body = utf8(value)
-
-
-class HTTPResponse(object):
-    """HTTP Response object.
-
-    Attributes:
-
-    * ``request``: HTTPRequest object
-
-    * ``code``: numeric HTTP status code, e.g. 200 or 404
-
-    * ``reason``: human-readable reason phrase describing the status code
-
-    * ``headers``: `tornado.httputil.HTTPHeaders` object
-
-    * ``effective_url``: final location of the resource after following any
-      redirects
-
-    * ``buffer``: ``cStringIO`` object for response body
-
-    * ``body``: response body as bytes (created on demand from ``self.buffer``)
-
-    * ``error``: Exception object, if any
-
-    * ``request_time``: seconds from request start to finish. Includes all
-      network operations from DNS resolution to receiving the last byte of
-      data. Does not include time spent in the queue (due to the
-      ``max_clients`` option). If redirects were followed, only includes
-      the final request.
-
-    * ``start_time``: Time at which the HTTP operation started, based on
-      `time.time` (not the monotonic clock used by `.IOLoop.time`). May
-      be ``None`` if the request timed out while in the queue.
-
-    * ``time_info``: dictionary of diagnostic timing information from the
-      request. Available data are subject to change, but currently uses timings
-      available from http://curl.haxx.se/libcurl/c/curl_easy_getinfo.html,
-      plus ``queue``, which is the delay (if any) introduced by waiting for
-      a slot under `AsyncHTTPClient`'s ``max_clients`` setting.
-
-    .. versionadded:: 5.1
-
-       Added the ``start_time`` attribute.
-
-    .. versionchanged:: 5.1
-
-       The ``request_time`` attribute previously included time spent in the queue
-       for ``simple_httpclient``, but not in ``curl_httpclient``. Now queueing time
-       is excluded in both implementations. ``request_time`` is now more accurate for
-       ``curl_httpclient`` because it uses a monotonic clock when available.
-    """
-
-    # I'm not sure why these don't get type-inferred from the references in __init__.
-    error = None  # type: Optional[BaseException]
-    _error_is_response_code = False
-    request = None  # type: HTTPRequest
-
-    def __init__(
-        self,
-        request: HTTPRequest,
-        code: int,
-        headers: httputil.HTTPHeaders = None,
-        buffer: BytesIO = None,
-        effective_url: str = None,
-        error: BaseException = None,
-        request_time: float = None,
-        time_info: Dict[str, float] = None,
-        reason: str = None,
-        start_time: float = None,
-    ) -> None:
-        if isinstance(request, _RequestProxy):
-            self.request = request.request
-        else:
-            self.request = request
-        self.code = code
-        self.reason = reason or httputil.responses.get(code, "Unknown")
-        if headers is not None:
-            self.headers = headers
-        else:
-            self.headers = httputil.HTTPHeaders()
-        self.buffer = buffer
-        self._body = None  # type: Optional[bytes]
-        if effective_url is None:
-            self.effective_url = request.url
-        else:
-            self.effective_url = effective_url
-        self._error_is_response_code = False
-        if error is None:
-            if self.code < 200 or self.code >= 300:
-                self._error_is_response_code = True
-                self.error = HTTPError(self.code, message=self.reason, response=self)
-            else:
-                self.error = None
-        else:
-            self.error = error
-        self.start_time = start_time
-        self.request_time = request_time
-        self.time_info = time_info or {}
-
-    @property
-    def body(self) -> bytes:
-        if self.buffer is None:
-            return b""
-        elif self._body is None:
-            self._body = self.buffer.getvalue()
-
-        return self._body
-
-    def rethrow(self) -> None:
-        """If there was an error on the request, raise an `HTTPError`."""
-        if self.error:
-            raise self.error
-
-    def __repr__(self) -> str:
-        args = ",".join("%s=%r" % i for i in sorted(self.__dict__.items()))
-        return "%s(%s)" % (self.__class__.__name__, args)
-
-
-class HTTPClientError(Exception):
-    """Exception thrown for an unsuccessful HTTP request.
-
-    Attributes:
-
-    * ``code`` - HTTP error integer error code, e.g. 404.  Error code 599 is
-      used when no HTTP response was received, e.g. for a timeout.
-
-    * ``response`` - `HTTPResponse` object, if any.
-
-    Note that if ``follow_redirects`` is False, redirects become HTTPErrors,
-    and you can look at ``error.response.headers['Location']`` to see the
-    destination of the redirect.
-
-    .. versionchanged:: 5.1
-
-       Renamed from ``HTTPError`` to ``HTTPClientError`` to avoid collisions with
-       `tornado.web.HTTPError`. The name ``tornado.httpclient.HTTPError`` remains
-       as an alias.
-    """
-
-    def __init__(
-        self, code: int, message: str = None, response: HTTPResponse = None
-    ) -> None:
-        self.code = code
-        self.message = message or httputil.responses.get(code, "Unknown")
-        self.response = response
-        super(HTTPClientError, self).__init__(code, message, response)
-
-    def __str__(self) -> str:
-        return "HTTP %d: %s" % (self.code, self.message)
-
-    # There is a cyclic reference between self and self.response,
-    # which breaks the default __repr__ implementation.
-    # (especially on pypy, which doesn't have the same recursion
-    # detection as cpython).
-    __repr__ = __str__
-
-
-HTTPError = HTTPClientError
-
-
-class _RequestProxy(object):
-    """Combines an object with a dictionary of defaults.
-
-    Used internally by AsyncHTTPClient implementations.
-    """
-
-    def __init__(
-        self, request: HTTPRequest, defaults: Optional[Dict[str, Any]]
-    ) -> None:
-        self.request = request
-        self.defaults = defaults
-
-    def __getattr__(self, name: str) -> Any:
-        request_attr = getattr(self.request, name)
-        if request_attr is not None:
-            return request_attr
-        elif self.defaults is not None:
-            return self.defaults.get(name, None)
-        else:
-            return None
-
-
-def main() -> None:
-    from tornado.options import define, options, parse_command_line
-
-    define("print_headers", type=bool, default=False)
-    define("print_body", type=bool, default=True)
-    define("follow_redirects", type=bool, default=True)
-    define("validate_cert", type=bool, default=True)
-    define("proxy_host", type=str)
-    define("proxy_port", type=int)
-    args = parse_command_line()
-    client = HTTPClient()
-    for arg in args:
-        try:
-            response = client.fetch(
-                arg,
-                follow_redirects=options.follow_redirects,
-                validate_cert=options.validate_cert,
-                proxy_host=options.proxy_host,
-                proxy_port=options.proxy_port,
-            )
-        except HTTPError as e:
-            if e.response is not None:
-                response = e.response
-            else:
-                raise
-        if options.print_headers:
-            print(response.headers)
-        if options.print_body:
-            print(native_str(response.body))
-    client.close()
-
-
-if __name__ == "__main__":
-    main()
diff --git a/venv/lib/python3.7/site-packages/tornado/httpserver.py b/venv/lib/python3.7/site-packages/tornado/httpserver.py
deleted file mode 100644
index 8044a4f..0000000
--- a/venv/lib/python3.7/site-packages/tornado/httpserver.py
+++ /dev/null
@@ -1,398 +0,0 @@
-#
-# Copyright 2009 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-"""A non-blocking, single-threaded HTTP server.
-
-Typical applications have little direct interaction with the `HTTPServer`
-class except to start a server at the beginning of the process
-(and even that is often done indirectly via `tornado.web.Application.listen`).
-
-.. versionchanged:: 4.0
-
-   The ``HTTPRequest`` class that used to live in this module has been moved
-   to `tornado.httputil.HTTPServerRequest`.  The old name remains as an alias.
-"""
-
-import socket
-import ssl
-
-from tornado.escape import native_str
-from tornado.http1connection import HTTP1ServerConnection, HTTP1ConnectionParameters
-from tornado import httputil
-from tornado import iostream
-from tornado import netutil
-from tornado.tcpserver import TCPServer
-from tornado.util import Configurable
-
-import typing
-from typing import Union, Any, Dict, Callable, List, Type, Tuple, Optional, Awaitable
-
-if typing.TYPE_CHECKING:
-    from typing import Set  # noqa: F401
-
-
-class HTTPServer(TCPServer, Configurable, httputil.HTTPServerConnectionDelegate):
-    r"""A non-blocking, single-threaded HTTP server.
-
-    A server is defined by a subclass of `.HTTPServerConnectionDelegate`,
-    or, for backwards compatibility, a callback that takes an
-    `.HTTPServerRequest` as an argument. The delegate is usually a
-    `tornado.web.Application`.
-
-    `HTTPServer` supports keep-alive connections by default
-    (automatically for HTTP/1.1, or for HTTP/1.0 when the client
-    requests ``Connection: keep-alive``).
-
-    If ``xheaders`` is ``True``, we support the
-    ``X-Real-Ip``/``X-Forwarded-For`` and
-    ``X-Scheme``/``X-Forwarded-Proto`` headers, which override the
-    remote IP and URI scheme/protocol for all requests.  These headers
-    are useful when running Tornado behind a reverse proxy or load
-    balancer.  The ``protocol`` argument can also be set to ``https``
-    if Tornado is run behind an SSL-decoding proxy that does not set one of
-    the supported ``xheaders``.
-
-    By default, when parsing the ``X-Forwarded-For`` header, Tornado will
-    select the last (i.e., the closest) address on the list of hosts as the
-    remote host IP address.  To select the next server in the chain, a list of
-    trusted downstream hosts may be passed as the ``trusted_downstream``
-    argument.  These hosts will be skipped when parsing the ``X-Forwarded-For``
-    header.
-
-    To make this server serve SSL traffic, send the ``ssl_options`` keyword
-    argument with an `ssl.SSLContext` object. For compatibility with older
-    versions of Python ``ssl_options`` may also be a dictionary of keyword
-    arguments for the `ssl.wrap_socket` method.::
-
-       ssl_ctx = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
-       ssl_ctx.load_cert_chain(os.path.join(data_dir, "mydomain.crt"),
-                               os.path.join(data_dir, "mydomain.key"))
-       HTTPServer(application, ssl_options=ssl_ctx)
-
-    `HTTPServer` initialization follows one of three patterns (the
-    initialization methods are defined on `tornado.tcpserver.TCPServer`):
-
-    1. `~tornado.tcpserver.TCPServer.listen`: simple single-process::
-
-            server = HTTPServer(app)
-            server.listen(8888)
-            IOLoop.current().start()
-
-       In many cases, `tornado.web.Application.listen` can be used to avoid
-       the need to explicitly create the `HTTPServer`.
-
-    2. `~tornado.tcpserver.TCPServer.bind`/`~tornado.tcpserver.TCPServer.start`:
-       simple multi-process::
-
-            server = HTTPServer(app)
-            server.bind(8888)
-            server.start(0)  # Forks multiple sub-processes
-            IOLoop.current().start()
-
-       When using this interface, an `.IOLoop` must *not* be passed
-       to the `HTTPServer` constructor.  `~.TCPServer.start` will always start
-       the server on the default singleton `.IOLoop`.
-
-    3. `~tornado.tcpserver.TCPServer.add_sockets`: advanced multi-process::
-
-            sockets = tornado.netutil.bind_sockets(8888)
-            tornado.process.fork_processes(0)
-            server = HTTPServer(app)
-            server.add_sockets(sockets)
-            IOLoop.current().start()
-
-       The `~.TCPServer.add_sockets` interface is more complicated,
-       but it can be used with `tornado.process.fork_processes` to
-       give you more flexibility in when the fork happens.
-       `~.TCPServer.add_sockets` can also be used in single-process
-       servers if you want to create your listening sockets in some
-       way other than `tornado.netutil.bind_sockets`.
-
-    .. versionchanged:: 4.0
-       Added ``decompress_request``, ``chunk_size``, ``max_header_size``,
-       ``idle_connection_timeout``, ``body_timeout``, ``max_body_size``
-       arguments.  Added support for `.HTTPServerConnectionDelegate`
-       instances as ``request_callback``.
-
-    .. versionchanged:: 4.1
-       `.HTTPServerConnectionDelegate.start_request` is now called with
-       two arguments ``(server_conn, request_conn)`` (in accordance with the
-       documentation) instead of one ``(request_conn)``.
-
-    .. versionchanged:: 4.2
-       `HTTPServer` is now a subclass of `tornado.util.Configurable`.
-
-    .. versionchanged:: 4.5
-       Added the ``trusted_downstream`` argument.
-
-    .. versionchanged:: 5.0
-       The ``io_loop`` argument has been removed.
-    """
-
-    def __init__(self, *args: Any, **kwargs: Any) -> None:
-        # Ignore args to __init__; real initialization belongs in
-        # initialize since we're Configurable. (there's something
-        # weird in initialization order between this class,
-        # Configurable, and TCPServer so we can't leave __init__ out
-        # completely)
-        pass
-
-    def initialize(
-        self,
-        request_callback: Union[
-            httputil.HTTPServerConnectionDelegate,
-            Callable[[httputil.HTTPServerRequest], None],
-        ],
-        no_keep_alive: bool = False,
-        xheaders: bool = False,
-        ssl_options: Union[Dict[str, Any], ssl.SSLContext] = None,
-        protocol: str = None,
-        decompress_request: bool = False,
-        chunk_size: int = None,
-        max_header_size: int = None,
-        idle_connection_timeout: float = None,
-        body_timeout: float = None,
-        max_body_size: int = None,
-        max_buffer_size: int = None,
-        trusted_downstream: List[str] = None,
-    ) -> None:
-        # This method's signature is not extracted with autodoc
-        # because we want its arguments to appear on the class
-        # constructor. When changing this signature, also update the
-        # copy in httpserver.rst.
-        self.request_callback = request_callback
-        self.xheaders = xheaders
-        self.protocol = protocol
-        self.conn_params = HTTP1ConnectionParameters(
-            decompress=decompress_request,
-            chunk_size=chunk_size,
-            max_header_size=max_header_size,
-            header_timeout=idle_connection_timeout or 3600,
-            max_body_size=max_body_size,
-            body_timeout=body_timeout,
-            no_keep_alive=no_keep_alive,
-        )
-        TCPServer.__init__(
-            self,
-            ssl_options=ssl_options,
-            max_buffer_size=max_buffer_size,
-            read_chunk_size=chunk_size,
-        )
-        self._connections = set()  # type: Set[HTTP1ServerConnection]
-        self.trusted_downstream = trusted_downstream
-
-    @classmethod
-    def configurable_base(cls) -> Type[Configurable]:
-        return HTTPServer
-
-    @classmethod
-    def configurable_default(cls) -> Type[Configurable]:
-        return HTTPServer
-
-    async def close_all_connections(self) -> None:
-        """Close all open connections and asynchronously wait for them to finish.
-
-        This method is used in combination with `~.TCPServer.stop` to
-        support clean shutdowns (especially for unittests). Typical
-        usage would call ``stop()`` first to stop accepting new
-        connections, then ``await close_all_connections()`` to wait for
-        existing connections to finish.
-
-        This method does not currently close open websocket connections.
-
-        Note that this method is a coroutine and must be caled with ``await``.
-
-        """
-        while self._connections:
-            # Peek at an arbitrary element of the set
-            conn = next(iter(self._connections))
-            await conn.close()
-
-    def handle_stream(self, stream: iostream.IOStream, address: Tuple) -> None:
-        context = _HTTPRequestContext(
-            stream, address, self.protocol, self.trusted_downstream
-        )
-        conn = HTTP1ServerConnection(stream, self.conn_params, context)
-        self._connections.add(conn)
-        conn.start_serving(self)
-
-    def start_request(
-        self, server_conn: object, request_conn: httputil.HTTPConnection
-    ) -> httputil.HTTPMessageDelegate:
-        if isinstance(self.request_callback, httputil.HTTPServerConnectionDelegate):
-            delegate = self.request_callback.start_request(server_conn, request_conn)
-        else:
-            delegate = _CallableAdapter(self.request_callback, request_conn)
-
-        if self.xheaders:
-            delegate = _ProxyAdapter(delegate, request_conn)
-
-        return delegate
-
-    def on_close(self, server_conn: object) -> None:
-        self._connections.remove(typing.cast(HTTP1ServerConnection, server_conn))
-
-
-class _CallableAdapter(httputil.HTTPMessageDelegate):
-    def __init__(
-        self,
-        request_callback: Callable[[httputil.HTTPServerRequest], None],
-        request_conn: httputil.HTTPConnection,
-    ) -> None:
-        self.connection = request_conn
-        self.request_callback = request_callback
-        self.request = None  # type: Optional[httputil.HTTPServerRequest]
-        self.delegate = None
-        self._chunks = []  # type: List[bytes]
-
-    def headers_received(
-        self,
-        start_line: Union[httputil.RequestStartLine, httputil.ResponseStartLine],
-        headers: httputil.HTTPHeaders,
-    ) -> Optional[Awaitable[None]]:
-        self.request = httputil.HTTPServerRequest(
-            connection=self.connection,
-            start_line=typing.cast(httputil.RequestStartLine, start_line),
-            headers=headers,
-        )
-        return None
-
-    def data_received(self, chunk: bytes) -> Optional[Awaitable[None]]:
-        self._chunks.append(chunk)
-        return None
-
-    def finish(self) -> None:
-        assert self.request is not None
-        self.request.body = b"".join(self._chunks)
-        self.request._parse_body()
-        self.request_callback(self.request)
-
-    def on_connection_close(self) -> None:
-        del self._chunks
-
-
-class _HTTPRequestContext(object):
-    def __init__(
-        self,
-        stream: iostream.IOStream,
-        address: Tuple,
-        protocol: Optional[str],
-        trusted_downstream: List[str] = None,
-    ) -> None:
-        self.address = address
-        # Save the socket's address family now so we know how to
-        # interpret self.address even after the stream is closed
-        # and its socket attribute replaced with None.
-        if stream.socket is not None:
-            self.address_family = stream.socket.family
-        else:
-            self.address_family = None
-        # In HTTPServerRequest we want an IP, not a full socket address.
-        if (
-            self.address_family in (socket.AF_INET, socket.AF_INET6)
-            and address is not None
-        ):
-            self.remote_ip = address[0]
-        else:
-            # Unix (or other) socket; fake the remote address.
-            self.remote_ip = "0.0.0.0"
-        if protocol:
-            self.protocol = protocol
-        elif isinstance(stream, iostream.SSLIOStream):
-            self.protocol = "https"
-        else:
-            self.protocol = "http"
-        self._orig_remote_ip = self.remote_ip
-        self._orig_protocol = self.protocol
-        self.trusted_downstream = set(trusted_downstream or [])
-
-    def __str__(self) -> str:
-        if self.address_family in (socket.AF_INET, socket.AF_INET6):
-            return self.remote_ip
-        elif isinstance(self.address, bytes):
-            # Python 3 with the -bb option warns about str(bytes),
-            # so convert it explicitly.
-            # Unix socket addresses are str on mac but bytes on linux.
-            return native_str(self.address)
-        else:
-            return str(self.address)
-
-    def _apply_xheaders(self, headers: httputil.HTTPHeaders) -> None:
-        """Rewrite the ``remote_ip`` and ``protocol`` fields."""
-        # Squid uses X-Forwarded-For, others use X-Real-Ip
-        ip = headers.get("X-Forwarded-For", self.remote_ip)
-        # Skip trusted downstream hosts in X-Forwarded-For list
-        for ip in (cand.strip() for cand in reversed(ip.split(","))):
-            if ip not in self.trusted_downstream:
-                break
-        ip = headers.get("X-Real-Ip", ip)
-        if netutil.is_valid_ip(ip):
-            self.remote_ip = ip
-        # AWS uses X-Forwarded-Proto
-        proto_header = headers.get(
-            "X-Scheme", headers.get("X-Forwarded-Proto", self.protocol)
-        )
-        if proto_header:
-            # use only the last proto entry if there is more than one
-            # TODO: support trusting mutiple layers of proxied protocol
-            proto_header = proto_header.split(",")[-1].strip()
-        if proto_header in ("http", "https"):
-            self.protocol = proto_header
-
-    def _unapply_xheaders(self) -> None:
-        """Undo changes from `_apply_xheaders`.
-
-        Xheaders are per-request so they should not leak to the next
-        request on the same connection.
-        """
-        self.remote_ip = self._orig_remote_ip
-        self.protocol = self._orig_protocol
-
-
-class _ProxyAdapter(httputil.HTTPMessageDelegate):
-    def __init__(
-        self,
-        delegate: httputil.HTTPMessageDelegate,
-        request_conn: httputil.HTTPConnection,
-    ) -> None:
-        self.connection = request_conn
-        self.delegate = delegate
-
-    def headers_received(
-        self,
-        start_line: Union[httputil.RequestStartLine, httputil.ResponseStartLine],
-        headers: httputil.HTTPHeaders,
-    ) -> Optional[Awaitable[None]]:
-        # TODO: either make context an official part of the
-        # HTTPConnection interface or figure out some other way to do this.
-        self.connection.context._apply_xheaders(headers)  # type: ignore
-        return self.delegate.headers_received(start_line, headers)
-
-    def data_received(self, chunk: bytes) -> Optional[Awaitable[None]]:
-        return self.delegate.data_received(chunk)
-
-    def finish(self) -> None:
-        self.delegate.finish()
-        self._cleanup()
-
-    def on_connection_close(self) -> None:
-        self.delegate.on_connection_close()
-        self._cleanup()
-
-    def _cleanup(self) -> None:
-        self.connection.context._unapply_xheaders()  # type: ignore
-
-
-HTTPRequest = httputil.HTTPServerRequest
diff --git a/venv/lib/python3.7/site-packages/tornado/httputil.py b/venv/lib/python3.7/site-packages/tornado/httputil.py
deleted file mode 100644
index 835327d..0000000
--- a/venv/lib/python3.7/site-packages/tornado/httputil.py
+++ /dev/null
@@ -1,1144 +0,0 @@
-#
-# Copyright 2009 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-"""HTTP utility code shared by clients and servers.
-
-This module also defines the `HTTPServerRequest` class which is exposed
-via `tornado.web.RequestHandler.request`.
-"""
-
-import calendar
-import collections
-import copy
-import datetime
-import email.utils
-from http.client import responses
-import http.cookies
-import re
-from ssl import SSLError
-import time
-import unicodedata
-from urllib.parse import urlencode, urlparse, urlunparse, parse_qsl
-
-from tornado.escape import native_str, parse_qs_bytes, utf8
-from tornado.log import gen_log
-from tornado.util import ObjectDict, unicode_type
-
-
-# responses is unused in this file, but we re-export it to other files.
-# Reference it so pyflakes doesn't complain.
-responses
-
-import typing
-from typing import (
-    Tuple,
-    Iterable,
-    List,
-    Mapping,
-    Iterator,
-    Dict,
-    Union,
-    Optional,
-    Awaitable,
-    Generator,
-    AnyStr,
-)
-
-if typing.TYPE_CHECKING:
-    from typing import Deque  # noqa: F401
-    from asyncio import Future  # noqa: F401
-    import unittest  # noqa: F401
-
-
-# RFC 7230 section 3.5: a recipient MAY recognize a single LF as a line
-# terminator and ignore any preceding CR.
-_CRLF_RE = re.compile(r"\r?\n")
-
-
-class _NormalizedHeaderCache(dict):
-    """Dynamic cached mapping of header names to Http-Header-Case.
-
-    Implemented as a dict subclass so that cache hits are as fast as a
-    normal dict lookup, without the overhead of a python function
-    call.
-
-    >>> normalized_headers = _NormalizedHeaderCache(10)
-    >>> normalized_headers["coNtent-TYPE"]
-    'Content-Type'
-    """
-
-    def __init__(self, size: int) -> None:
-        super(_NormalizedHeaderCache, self).__init__()
-        self.size = size
-        self.queue = collections.deque()  # type: Deque[str]
-
-    def __missing__(self, key: str) -> str:
-        normalized = "-".join([w.capitalize() for w in key.split("-")])
-        self[key] = normalized
-        self.queue.append(key)
-        if len(self.queue) > self.size:
-            # Limit the size of the cache.  LRU would be better, but this
-            # simpler approach should be fine.  In Python 2.7+ we could
-            # use OrderedDict (or in 3.2+, @functools.lru_cache).
-            old_key = self.queue.popleft()
-            del self[old_key]
-        return normalized
-
-
-_normalized_headers = _NormalizedHeaderCache(1000)
-
-
-class HTTPHeaders(collections.abc.MutableMapping):
-    """A dictionary that maintains ``Http-Header-Case`` for all keys.
-
-    Supports multiple values per key via a pair of new methods,
-    `add()` and `get_list()`.  The regular dictionary interface
-    returns a single value per key, with multiple values joined by a
-    comma.
-
-    >>> h = HTTPHeaders({"content-type": "text/html"})
-    >>> list(h.keys())
-    ['Content-Type']
-    >>> h["Content-Type"]
-    'text/html'
-
-    >>> h.add("Set-Cookie", "A=B")
-    >>> h.add("Set-Cookie", "C=D")
-    >>> h["set-cookie"]
-    'A=B,C=D'
-    >>> h.get_list("set-cookie")
-    ['A=B', 'C=D']
-
-    >>> for (k,v) in sorted(h.get_all()):
-    ...    print('%s: %s' % (k,v))
-    ...
-    Content-Type: text/html
-    Set-Cookie: A=B
-    Set-Cookie: C=D
-    """
-
-    @typing.overload
-    def __init__(self, __arg: Mapping[str, List[str]]) -> None:
-        pass
-
-    @typing.overload  # noqa: F811
-    def __init__(self, __arg: Mapping[str, str]) -> None:
-        pass
-
-    @typing.overload  # noqa: F811
-    def __init__(self, *args: Tuple[str, str]) -> None:
-        pass
-
-    @typing.overload  # noqa: F811
-    def __init__(self, **kwargs: str) -> None:
-        pass
-
-    def __init__(self, *args: typing.Any, **kwargs: str) -> None:  # noqa: F811
-        self._dict = {}  # type: typing.Dict[str, str]
-        self._as_list = {}  # type: typing.Dict[str, typing.List[str]]
-        self._last_key = None
-        if len(args) == 1 and len(kwargs) == 0 and isinstance(args[0], HTTPHeaders):
-            # Copy constructor
-            for k, v in args[0].get_all():
-                self.add(k, v)
-        else:
-            # Dict-style initialization
-            self.update(*args, **kwargs)
-
-    # new public methods
-
-    def add(self, name: str, value: str) -> None:
-        """Adds a new value for the given key."""
-        norm_name = _normalized_headers[name]
-        self._last_key = norm_name
-        if norm_name in self:
-            self._dict[norm_name] = (
-                native_str(self[norm_name]) + "," + native_str(value)
-            )
-            self._as_list[norm_name].append(value)
-        else:
-            self[norm_name] = value
-
-    def get_list(self, name: str) -> List[str]:
-        """Returns all values for the given header as a list."""
-        norm_name = _normalized_headers[name]
-        return self._as_list.get(norm_name, [])
-
-    def get_all(self) -> Iterable[Tuple[str, str]]:
-        """Returns an iterable of all (name, value) pairs.
-
-        If a header has multiple values, multiple pairs will be
-        returned with the same name.
-        """
-        for name, values in self._as_list.items():
-            for value in values:
-                yield (name, value)
-
-    def parse_line(self, line: str) -> None:
-        """Updates the dictionary with a single header line.
-
-        >>> h = HTTPHeaders()
-        >>> h.parse_line("Content-Type: text/html")
-        >>> h.get('content-type')
-        'text/html'
-        """
-        if line[0].isspace():
-            # continuation of a multi-line header
-            if self._last_key is None:
-                raise HTTPInputError("first header line cannot start with whitespace")
-            new_part = " " + line.lstrip()
-            self._as_list[self._last_key][-1] += new_part
-            self._dict[self._last_key] += new_part
-        else:
-            try:
-                name, value = line.split(":", 1)
-            except ValueError:
-                raise HTTPInputError("no colon in header line")
-            self.add(name, value.strip())
-
-    @classmethod
-    def parse(cls, headers: str) -> "HTTPHeaders":
-        """Returns a dictionary from HTTP header text.
-
-        >>> h = HTTPHeaders.parse("Content-Type: text/html\\r\\nContent-Length: 42\\r\\n")
-        >>> sorted(h.items())
-        [('Content-Length', '42'), ('Content-Type', 'text/html')]
-
-        .. versionchanged:: 5.1
-
-           Raises `HTTPInputError` on malformed headers instead of a
-           mix of `KeyError`, and `ValueError`.
-
-        """
-        h = cls()
-        for line in _CRLF_RE.split(headers):
-            if line:
-                h.parse_line(line)
-        return h
-
-    # MutableMapping abstract method implementations.
-
-    def __setitem__(self, name: str, value: str) -> None:
-        norm_name = _normalized_headers[name]
-        self._dict[norm_name] = value
-        self._as_list[norm_name] = [value]
-
-    def __getitem__(self, name: str) -> str:
-        return self._dict[_normalized_headers[name]]
-
-    def __delitem__(self, name: str) -> None:
-        norm_name = _normalized_headers[name]
-        del self._dict[norm_name]
-        del self._as_list[norm_name]
-
-    def __len__(self) -> int:
-        return len(self._dict)
-
-    def __iter__(self) -> Iterator[typing.Any]:
-        return iter(self._dict)
-
-    def copy(self) -> "HTTPHeaders":
-        # defined in dict but not in MutableMapping.
-        return HTTPHeaders(self)
-
-    # Use our overridden copy method for the copy.copy module.
-    # This makes shallow copies one level deeper, but preserves
-    # the appearance that HTTPHeaders is a single container.
-    __copy__ = copy
-
-    def __str__(self) -> str:
-        lines = []
-        for name, value in self.get_all():
-            lines.append("%s: %s\n" % (name, value))
-        return "".join(lines)
-
-    __unicode__ = __str__
-
-
-class HTTPServerRequest(object):
-    """A single HTTP request.
-
-    All attributes are type `str` unless otherwise noted.
-
-    .. attribute:: method
-
-       HTTP request method, e.g. "GET" or "POST"
-
-    .. attribute:: uri
-
-       The requested uri.
-
-    .. attribute:: path
-
-       The path portion of `uri`
-
-    .. attribute:: query
-
-       The query portion of `uri`
-
-    .. attribute:: version
-
-       HTTP version specified in request, e.g. "HTTP/1.1"
-
-    .. attribute:: headers
-
-       `.HTTPHeaders` dictionary-like object for request headers.  Acts like
-       a case-insensitive dictionary with additional methods for repeated
-       headers.
-
-    .. attribute:: body
-
-       Request body, if present, as a byte string.
-
-    .. attribute:: remote_ip
-
-       Client's IP address as a string.  If ``HTTPServer.xheaders`` is set,
-       will pass along the real IP address provided by a load balancer
-       in the ``X-Real-Ip`` or ``X-Forwarded-For`` header.
-
-    .. versionchanged:: 3.1
-       The list format of ``X-Forwarded-For`` is now supported.
-
-    .. attribute:: protocol
-
-       The protocol used, either "http" or "https".  If ``HTTPServer.xheaders``
-       is set, will pass along the protocol used by a load balancer if
-       reported via an ``X-Scheme`` header.
-
-    .. attribute:: host
-
-       The requested hostname, usually taken from the ``Host`` header.
-
-    .. attribute:: arguments
-
-       GET/POST arguments are available in the arguments property, which
-       maps arguments names to lists of values (to support multiple values
-       for individual names). Names are of type `str`, while arguments
-       are byte strings.  Note that this is different from
-       `.RequestHandler.get_argument`, which returns argument values as
-       unicode strings.
-
-    .. attribute:: query_arguments
-
-       Same format as ``arguments``, but contains only arguments extracted
-       from the query string.
-
-       .. versionadded:: 3.2
-
-    .. attribute:: body_arguments
-
-       Same format as ``arguments``, but contains only arguments extracted
-       from the request body.
-
-       .. versionadded:: 3.2
-
-    .. attribute:: files
-
-       File uploads are available in the files property, which maps file
-       names to lists of `.HTTPFile`.
-
-    .. attribute:: connection
-
-       An HTTP request is attached to a single HTTP connection, which can
-       be accessed through the "connection" attribute. Since connections
-       are typically kept open in HTTP/1.1, multiple requests can be handled
-       sequentially on a single connection.
-
-    .. versionchanged:: 4.0
-       Moved from ``tornado.httpserver.HTTPRequest``.
-    """
-
-    path = None  # type: str
-    query = None  # type: str
-
-    # HACK: Used for stream_request_body
-    _body_future = None  # type: Future[None]
-
-    def __init__(
-        self,
-        method: str = None,
-        uri: str = None,
-        version: str = "HTTP/1.0",
-        headers: HTTPHeaders = None,
-        body: bytes = None,
-        host: str = None,
-        files: Dict[str, List["HTTPFile"]] = None,
-        connection: "HTTPConnection" = None,
-        start_line: "RequestStartLine" = None,
-        server_connection: object = None,
-    ) -> None:
-        if start_line is not None:
-            method, uri, version = start_line
-        self.method = method
-        self.uri = uri
-        self.version = version
-        self.headers = headers or HTTPHeaders()
-        self.body = body or b""
-
-        # set remote IP and protocol
-        context = getattr(connection, "context", None)
-        self.remote_ip = getattr(context, "remote_ip", None)
-        self.protocol = getattr(context, "protocol", "http")
-
-        self.host = host or self.headers.get("Host") or "127.0.0.1"
-        self.host_name = split_host_and_port(self.host.lower())[0]
-        self.files = files or {}
-        self.connection = connection
-        self.server_connection = server_connection
-        self._start_time = time.time()
-        self._finish_time = None
-
-        if uri is not None:
-            self.path, sep, self.query = uri.partition("?")
-        self.arguments = parse_qs_bytes(self.query, keep_blank_values=True)
-        self.query_arguments = copy.deepcopy(self.arguments)
-        self.body_arguments = {}  # type: Dict[str, List[bytes]]
-
-    @property
-    def cookies(self) -> Dict[str, http.cookies.Morsel]:
-        """A dictionary of ``http.cookies.Morsel`` objects."""
-        if not hasattr(self, "_cookies"):
-            self._cookies = http.cookies.SimpleCookie()
-            if "Cookie" in self.headers:
-                try:
-                    parsed = parse_cookie(self.headers["Cookie"])
-                except Exception:
-                    pass
-                else:
-                    for k, v in parsed.items():
-                        try:
-                            self._cookies[k] = v
-                        except Exception:
-                            # SimpleCookie imposes some restrictions on keys;
-                            # parse_cookie does not. Discard any cookies
-                            # with disallowed keys.
-                            pass
-        return self._cookies
-
-    def full_url(self) -> str:
-        """Reconstructs the full URL for this request."""
-        return self.protocol + "://" + self.host + self.uri
-
-    def request_time(self) -> float:
-        """Returns the amount of time it took for this request to execute."""
-        if self._finish_time is None:
-            return time.time() - self._start_time
-        else:
-            return self._finish_time - self._start_time
-
-    def get_ssl_certificate(
-        self, binary_form: bool = False
-    ) -> Union[None, Dict, bytes]:
-        """Returns the client's SSL certificate, if any.
-
-        To use client certificates, the HTTPServer's
-        `ssl.SSLContext.verify_mode` field must be set, e.g.::
-
-            ssl_ctx = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
-            ssl_ctx.load_cert_chain("foo.crt", "foo.key")
-            ssl_ctx.load_verify_locations("cacerts.pem")
-            ssl_ctx.verify_mode = ssl.CERT_REQUIRED
-            server = HTTPServer(app, ssl_options=ssl_ctx)
-
-        By default, the return value is a dictionary (or None, if no
-        client certificate is present).  If ``binary_form`` is true, a
-        DER-encoded form of the certificate is returned instead.  See
-        SSLSocket.getpeercert() in the standard library for more
-        details.
-        http://docs.python.org/library/ssl.html#sslsocket-objects
-        """
-        try:
-            if self.connection is None:
-                return None
-            # TODO: add a method to HTTPConnection for this so it can work with HTTP/2
-            return self.connection.stream.socket.getpeercert(  # type: ignore
-                binary_form=binary_form
-            )
-        except SSLError:
-            return None
-
-    def _parse_body(self) -> None:
-        parse_body_arguments(
-            self.headers.get("Content-Type", ""),
-            self.body,
-            self.body_arguments,
-            self.files,
-            self.headers,
-        )
-
-        for k, v in self.body_arguments.items():
-            self.arguments.setdefault(k, []).extend(v)
-
-    def __repr__(self) -> str:
-        attrs = ("protocol", "host", "method", "uri", "version", "remote_ip")
-        args = ", ".join(["%s=%r" % (n, getattr(self, n)) for n in attrs])
-        return "%s(%s)" % (self.__class__.__name__, args)
-
-
-class HTTPInputError(Exception):
-    """Exception class for malformed HTTP requests or responses
-    from remote sources.
-
-    .. versionadded:: 4.0
-    """
-
-    pass
-
-
-class HTTPOutputError(Exception):
-    """Exception class for errors in HTTP output.
-
-    .. versionadded:: 4.0
-    """
-
-    pass
-
-
-class HTTPServerConnectionDelegate(object):
-    """Implement this interface to handle requests from `.HTTPServer`.
-
-    .. versionadded:: 4.0
-    """
-
-    def start_request(
-        self, server_conn: object, request_conn: "HTTPConnection"
-    ) -> "HTTPMessageDelegate":
-        """This method is called by the server when a new request has started.
-
-        :arg server_conn: is an opaque object representing the long-lived
-            (e.g. tcp-level) connection.
-        :arg request_conn: is a `.HTTPConnection` object for a single
-            request/response exchange.
-
-        This method should return a `.HTTPMessageDelegate`.
-        """
-        raise NotImplementedError()
-
-    def on_close(self, server_conn: object) -> None:
-        """This method is called when a connection has been closed.
-
-        :arg server_conn: is a server connection that has previously been
-            passed to ``start_request``.
-        """
-        pass
-
-
-class HTTPMessageDelegate(object):
-    """Implement this interface to handle an HTTP request or response.
-
-    .. versionadded:: 4.0
-    """
-
-    # TODO: genericize this class to avoid exposing the Union.
-    def headers_received(
-        self,
-        start_line: Union["RequestStartLine", "ResponseStartLine"],
-        headers: HTTPHeaders,
-    ) -> Optional[Awaitable[None]]:
-        """Called when the HTTP headers have been received and parsed.
-
-        :arg start_line: a `.RequestStartLine` or `.ResponseStartLine`
-            depending on whether this is a client or server message.
-        :arg headers: a `.HTTPHeaders` instance.
-
-        Some `.HTTPConnection` methods can only be called during
-        ``headers_received``.
-
-        May return a `.Future`; if it does the body will not be read
-        until it is done.
-        """
-        pass
-
-    def data_received(self, chunk: bytes) -> Optional[Awaitable[None]]:
-        """Called when a chunk of data has been received.
-
-        May return a `.Future` for flow control.
-        """
-        pass
-
-    def finish(self) -> None:
-        """Called after the last chunk of data has been received."""
-        pass
-
-    def on_connection_close(self) -> None:
-        """Called if the connection is closed without finishing the request.
-
-        If ``headers_received`` is called, either ``finish`` or
-        ``on_connection_close`` will be called, but not both.
-        """
-        pass
-
-
-class HTTPConnection(object):
-    """Applications use this interface to write their responses.
-
-    .. versionadded:: 4.0
-    """
-
-    def write_headers(
-        self,
-        start_line: Union["RequestStartLine", "ResponseStartLine"],
-        headers: HTTPHeaders,
-        chunk: bytes = None,
-    ) -> "Future[None]":
-        """Write an HTTP header block.
-
-        :arg start_line: a `.RequestStartLine` or `.ResponseStartLine`.
-        :arg headers: a `.HTTPHeaders` instance.
-        :arg chunk: the first (optional) chunk of data.  This is an optimization
-            so that small responses can be written in the same call as their
-            headers.
-
-        The ``version`` field of ``start_line`` is ignored.
-
-        Returns a future for flow control.
-
-        .. versionchanged:: 6.0
-
-           The ``callback`` argument was removed.
-        """
-        raise NotImplementedError()
-
-    def write(self, chunk: bytes) -> "Future[None]":
-        """Writes a chunk of body data.
-
-        Returns a future for flow control.
-
-        .. versionchanged:: 6.0
-
-           The ``callback`` argument was removed.
-        """
-        raise NotImplementedError()
-
-    def finish(self) -> None:
-        """Indicates that the last body data has been written.
-        """
-        raise NotImplementedError()
-
-
-def url_concat(
-    url: str,
-    args: Union[
-        None, Dict[str, str], List[Tuple[str, str]], Tuple[Tuple[str, str], ...]
-    ],
-) -> str:
-    """Concatenate url and arguments regardless of whether
-    url has existing query parameters.
-
-    ``args`` may be either a dictionary or a list of key-value pairs
-    (the latter allows for multiple values with the same key.
-
-    >>> url_concat("http://example.com/foo", dict(c="d"))
-    'http://example.com/foo?c=d'
-    >>> url_concat("http://example.com/foo?a=b", dict(c="d"))
-    'http://example.com/foo?a=b&c=d'
-    >>> url_concat("http://example.com/foo?a=b", [("c", "d"), ("c", "d2")])
-    'http://example.com/foo?a=b&c=d&c=d2'
-    """
-    if args is None:
-        return url
-    parsed_url = urlparse(url)
-    if isinstance(args, dict):
-        parsed_query = parse_qsl(parsed_url.query, keep_blank_values=True)
-        parsed_query.extend(args.items())
-    elif isinstance(args, list) or isinstance(args, tuple):
-        parsed_query = parse_qsl(parsed_url.query, keep_blank_values=True)
-        parsed_query.extend(args)
-    else:
-        err = "'args' parameter should be dict, list or tuple. Not {0}".format(
-            type(args)
-        )
-        raise TypeError(err)
-    final_query = urlencode(parsed_query)
-    url = urlunparse(
-        (
-            parsed_url[0],
-            parsed_url[1],
-            parsed_url[2],
-            parsed_url[3],
-            final_query,
-            parsed_url[5],
-        )
-    )
-    return url
-
-
-class HTTPFile(ObjectDict):
-    """Represents a file uploaded via a form.
-
-    For backwards compatibility, its instance attributes are also
-    accessible as dictionary keys.
-
-    * ``filename``
-    * ``body``
-    * ``content_type``
-    """
-
-    pass
-
-
-def _parse_request_range(
-    range_header: str
-) -> Optional[Tuple[Optional[int], Optional[int]]]:
-    """Parses a Range header.
-
-    Returns either ``None`` or tuple ``(start, end)``.
-    Note that while the HTTP headers use inclusive byte positions,
-    this method returns indexes suitable for use in slices.
-
-    >>> start, end = _parse_request_range("bytes=1-2")
-    >>> start, end
-    (1, 3)
-    >>> [0, 1, 2, 3, 4][start:end]
-    [1, 2]
-    >>> _parse_request_range("bytes=6-")
-    (6, None)
-    >>> _parse_request_range("bytes=-6")
-    (-6, None)
-    >>> _parse_request_range("bytes=-0")
-    (None, 0)
-    >>> _parse_request_range("bytes=")
-    (None, None)
-    >>> _parse_request_range("foo=42")
-    >>> _parse_request_range("bytes=1-2,6-10")
-
-    Note: only supports one range (ex, ``bytes=1-2,6-10`` is not allowed).
-
-    See [0] for the details of the range header.
-
-    [0]: http://greenbytes.de/tech/webdav/draft-ietf-httpbis-p5-range-latest.html#byte.ranges
-    """
-    unit, _, value = range_header.partition("=")
-    unit, value = unit.strip(), value.strip()
-    if unit != "bytes":
-        return None
-    start_b, _, end_b = value.partition("-")
-    try:
-        start = _int_or_none(start_b)
-        end = _int_or_none(end_b)
-    except ValueError:
-        return None
-    if end is not None:
-        if start is None:
-            if end != 0:
-                start = -end
-                end = None
-        else:
-            end += 1
-    return (start, end)
-
-
-def _get_content_range(start: Optional[int], end: Optional[int], total: int) -> str:
-    """Returns a suitable Content-Range header:
-
-    >>> print(_get_content_range(None, 1, 4))
-    bytes 0-0/4
-    >>> print(_get_content_range(1, 3, 4))
-    bytes 1-2/4
-    >>> print(_get_content_range(None, None, 4))
-    bytes 0-3/4
-    """
-    start = start or 0
-    end = (end or total) - 1
-    return "bytes %s-%s/%s" % (start, end, total)
-
-
-def _int_or_none(val: str) -> Optional[int]:
-    val = val.strip()
-    if val == "":
-        return None
-    return int(val)
-
-
-def parse_body_arguments(
-    content_type: str,
-    body: bytes,
-    arguments: Dict[str, List[bytes]],
-    files: Dict[str, List[HTTPFile]],
-    headers: HTTPHeaders = None,
-) -> None:
-    """Parses a form request body.
-
-    Supports ``application/x-www-form-urlencoded`` and
-    ``multipart/form-data``.  The ``content_type`` parameter should be
-    a string and ``body`` should be a byte string.  The ``arguments``
-    and ``files`` parameters are dictionaries that will be updated
-    with the parsed contents.
-    """
-    if content_type.startswith("application/x-www-form-urlencoded"):
-        if headers and "Content-Encoding" in headers:
-            gen_log.warning(
-                "Unsupported Content-Encoding: %s", headers["Content-Encoding"]
-            )
-            return
-        try:
-            uri_arguments = parse_qs_bytes(native_str(body), keep_blank_values=True)
-        except Exception as e:
-            gen_log.warning("Invalid x-www-form-urlencoded body: %s", e)
-            uri_arguments = {}
-        for name, values in uri_arguments.items():
-            if values:
-                arguments.setdefault(name, []).extend(values)
-    elif content_type.startswith("multipart/form-data"):
-        if headers and "Content-Encoding" in headers:
-            gen_log.warning(
-                "Unsupported Content-Encoding: %s", headers["Content-Encoding"]
-            )
-            return
-        try:
-            fields = content_type.split(";")
-            for field in fields:
-                k, sep, v = field.strip().partition("=")
-                if k == "boundary" and v:
-                    parse_multipart_form_data(utf8(v), body, arguments, files)
-                    break
-            else:
-                raise ValueError("multipart boundary not found")
-        except Exception as e:
-            gen_log.warning("Invalid multipart/form-data: %s", e)
-
-
-def parse_multipart_form_data(
-    boundary: bytes,
-    data: bytes,
-    arguments: Dict[str, List[bytes]],
-    files: Dict[str, List[HTTPFile]],
-) -> None:
-    """Parses a ``multipart/form-data`` body.
-
-    The ``boundary`` and ``data`` parameters are both byte strings.
-    The dictionaries given in the arguments and files parameters
-    will be updated with the contents of the body.
-
-    .. versionchanged:: 5.1
-
-       Now recognizes non-ASCII filenames in RFC 2231/5987
-       (``filename*=``) format.
-    """
-    # The standard allows for the boundary to be quoted in the header,
-    # although it's rare (it happens at least for google app engine
-    # xmpp).  I think we're also supposed to handle backslash-escapes
-    # here but I'll save that until we see a client that uses them
-    # in the wild.
-    if boundary.startswith(b'"') and boundary.endswith(b'"'):
-        boundary = boundary[1:-1]
-    final_boundary_index = data.rfind(b"--" + boundary + b"--")
-    if final_boundary_index == -1:
-        gen_log.warning("Invalid multipart/form-data: no final boundary")
-        return
-    parts = data[:final_boundary_index].split(b"--" + boundary + b"\r\n")
-    for part in parts:
-        if not part:
-            continue
-        eoh = part.find(b"\r\n\r\n")
-        if eoh == -1:
-            gen_log.warning("multipart/form-data missing headers")
-            continue
-        headers = HTTPHeaders.parse(part[:eoh].decode("utf-8"))
-        disp_header = headers.get("Content-Disposition", "")
-        disposition, disp_params = _parse_header(disp_header)
-        if disposition != "form-data" or not part.endswith(b"\r\n"):
-            gen_log.warning("Invalid multipart/form-data")
-            continue
-        value = part[eoh + 4 : -2]
-        if not disp_params.get("name"):
-            gen_log.warning("multipart/form-data value missing name")
-            continue
-        name = disp_params["name"]
-        if disp_params.get("filename"):
-            ctype = headers.get("Content-Type", "application/unknown")
-            files.setdefault(name, []).append(
-                HTTPFile(
-                    filename=disp_params["filename"], body=value, content_type=ctype
-                )
-            )
-        else:
-            arguments.setdefault(name, []).append(value)
-
-
-def format_timestamp(
-    ts: Union[int, float, tuple, time.struct_time, datetime.datetime]
-) -> str:
-    """Formats a timestamp in the format used by HTTP.
-
-    The argument may be a numeric timestamp as returned by `time.time`,
-    a time tuple as returned by `time.gmtime`, or a `datetime.datetime`
-    object.
-
-    >>> format_timestamp(1359312200)
-    'Sun, 27 Jan 2013 18:43:20 GMT'
-    """
-    if isinstance(ts, (int, float)):
-        time_num = ts
-    elif isinstance(ts, (tuple, time.struct_time)):
-        time_num = calendar.timegm(ts)
-    elif isinstance(ts, datetime.datetime):
-        time_num = calendar.timegm(ts.utctimetuple())
-    else:
-        raise TypeError("unknown timestamp type: %r" % ts)
-    return email.utils.formatdate(time_num, usegmt=True)
-
-
-RequestStartLine = collections.namedtuple(
-    "RequestStartLine", ["method", "path", "version"]
-)
-
-
-def parse_request_start_line(line: str) -> RequestStartLine:
-    """Returns a (method, path, version) tuple for an HTTP 1.x request line.
-
-    The response is a `collections.namedtuple`.
-
-    >>> parse_request_start_line("GET /foo HTTP/1.1")
-    RequestStartLine(method='GET', path='/foo', version='HTTP/1.1')
-    """
-    try:
-        method, path, version = line.split(" ")
-    except ValueError:
-        # https://tools.ietf.org/html/rfc7230#section-3.1.1
-        # invalid request-line SHOULD respond with a 400 (Bad Request)
-        raise HTTPInputError("Malformed HTTP request line")
-    if not re.match(r"^HTTP/1\.[0-9]$", version):
-        raise HTTPInputError(
-            "Malformed HTTP version in HTTP Request-Line: %r" % version
-        )
-    return RequestStartLine(method, path, version)
-
-
-ResponseStartLine = collections.namedtuple(
-    "ResponseStartLine", ["version", "code", "reason"]
-)
-
-
-def parse_response_start_line(line: str) -> ResponseStartLine:
-    """Returns a (version, code, reason) tuple for an HTTP 1.x response line.
-
-    The response is a `collections.namedtuple`.
-
-    >>> parse_response_start_line("HTTP/1.1 200 OK")
-    ResponseStartLine(version='HTTP/1.1', code=200, reason='OK')
-    """
-    line = native_str(line)
-    match = re.match("(HTTP/1.[0-9]) ([0-9]+) ([^\r]*)", line)
-    if not match:
-        raise HTTPInputError("Error parsing response start line")
-    return ResponseStartLine(match.group(1), int(match.group(2)), match.group(3))
-
-
-# _parseparam and _parse_header are copied and modified from python2.7's cgi.py
-# The original 2.7 version of this code did not correctly support some
-# combinations of semicolons and double quotes.
-# It has also been modified to support valueless parameters as seen in
-# websocket extension negotiations, and to support non-ascii values in
-# RFC 2231/5987 format.
-
-
-def _parseparam(s: str) -> Generator[str, None, None]:
-    while s[:1] == ";":
-        s = s[1:]
-        end = s.find(";")
-        while end > 0 and (s.count('"', 0, end) - s.count('\\"', 0, end)) % 2:
-            end = s.find(";", end + 1)
-        if end < 0:
-            end = len(s)
-        f = s[:end]
-        yield f.strip()
-        s = s[end:]
-
-
-def _parse_header(line: str) -> Tuple[str, Dict[str, str]]:
-    r"""Parse a Content-type like header.
-
-    Return the main content-type and a dictionary of options.
-
-    >>> d = "form-data; foo=\"b\\\\a\\\"r\"; file*=utf-8''T%C3%A4st"
-    >>> ct, d = _parse_header(d)
-    >>> ct
-    'form-data'
-    >>> d['file'] == r'T\u00e4st'.encode('ascii').decode('unicode_escape')
-    True
-    >>> d['foo']
-    'b\\a"r'
-    """
-    parts = _parseparam(";" + line)
-    key = next(parts)
-    # decode_params treats first argument special, but we already stripped key
-    params = [("Dummy", "value")]
-    for p in parts:
-        i = p.find("=")
-        if i >= 0:
-            name = p[:i].strip().lower()
-            value = p[i + 1 :].strip()
-            params.append((name, native_str(value)))
-    decoded_params = email.utils.decode_params(params)
-    decoded_params.pop(0)  # get rid of the dummy again
-    pdict = {}
-    for name, decoded_value in decoded_params:
-        value = email.utils.collapse_rfc2231_value(decoded_value)
-        if len(value) >= 2 and value[0] == '"' and value[-1] == '"':
-            value = value[1:-1]
-        pdict[name] = value
-    return key, pdict
-
-
-def _encode_header(key: str, pdict: Dict[str, str]) -> str:
-    """Inverse of _parse_header.
-
-    >>> _encode_header('permessage-deflate',
-    ...     {'client_max_window_bits': 15, 'client_no_context_takeover': None})
-    'permessage-deflate; client_max_window_bits=15; client_no_context_takeover'
-    """
-    if not pdict:
-        return key
-    out = [key]
-    # Sort the parameters just to make it easy to test.
-    for k, v in sorted(pdict.items()):
-        if v is None:
-            out.append(k)
-        else:
-            # TODO: quote if necessary.
-            out.append("%s=%s" % (k, v))
-    return "; ".join(out)
-
-
-def encode_username_password(
-    username: Union[str, bytes], password: Union[str, bytes]
-) -> bytes:
-    """Encodes a username/password pair in the format used by HTTP auth.
-
-    The return value is a byte string in the form ``username:password``.
-
-    .. versionadded:: 5.1
-    """
-    if isinstance(username, unicode_type):
-        username = unicodedata.normalize("NFC", username)
-    if isinstance(password, unicode_type):
-        password = unicodedata.normalize("NFC", password)
-    return utf8(username) + b":" + utf8(password)
-
-
-def doctests():
-    # type: () -> unittest.TestSuite
-    import doctest
-
-    return doctest.DocTestSuite()
-
-
-def split_host_and_port(netloc: str) -> Tuple[str, Optional[int]]:
-    """Returns ``(host, port)`` tuple from ``netloc``.
-
-    Returned ``port`` will be ``None`` if not present.
-
-    .. versionadded:: 4.1
-    """
-    match = re.match(r"^(.+):(\d+)$", netloc)
-    if match:
-        host = match.group(1)
-        port = int(match.group(2))  # type: Optional[int]
-    else:
-        host = netloc
-        port = None
-    return (host, port)
-
-
-def qs_to_qsl(qs: Dict[str, List[AnyStr]]) -> Iterable[Tuple[str, AnyStr]]:
-    """Generator converting a result of ``parse_qs`` back to name-value pairs.
-
-    .. versionadded:: 5.0
-    """
-    for k, vs in qs.items():
-        for v in vs:
-            yield (k, v)
-
-
-_OctalPatt = re.compile(r"\\[0-3][0-7][0-7]")
-_QuotePatt = re.compile(r"[\\].")
-_nulljoin = "".join
-
-
-def _unquote_cookie(s: str) -> str:
-    """Handle double quotes and escaping in cookie values.
-
-    This method is copied verbatim from the Python 3.5 standard
-    library (http.cookies._unquote) so we don't have to depend on
-    non-public interfaces.
-    """
-    # If there aren't any doublequotes,
-    # then there can't be any special characters.  See RFC 2109.
-    if s is None or len(s) < 2:
-        return s
-    if s[0] != '"' or s[-1] != '"':
-        return s
-
-    # We have to assume that we must decode this string.
-    # Down to work.
-
-    # Remove the "s
-    s = s[1:-1]
-
-    # Check for special sequences.  Examples:
-    #    \012 --> \n
-    #    \"   --> "
-    #
-    i = 0
-    n = len(s)
-    res = []
-    while 0 <= i < n:
-        o_match = _OctalPatt.search(s, i)
-        q_match = _QuotePatt.search(s, i)
-        if not o_match and not q_match:  # Neither matched
-            res.append(s[i:])
-            break
-        # else:
-        j = k = -1
-        if o_match:
-            j = o_match.start(0)
-        if q_match:
-            k = q_match.start(0)
-        if q_match and (not o_match or k < j):  # QuotePatt matched
-            res.append(s[i:k])
-            res.append(s[k + 1])
-            i = k + 2
-        else:  # OctalPatt matched
-            res.append(s[i:j])
-            res.append(chr(int(s[j + 1 : j + 4], 8)))
-            i = j + 4
-    return _nulljoin(res)
-
-
-def parse_cookie(cookie: str) -> Dict[str, str]:
-    """Parse a ``Cookie`` HTTP header into a dict of name/value pairs.
-
-    This function attempts to mimic browser cookie parsing behavior;
-    it specifically does not follow any of the cookie-related RFCs
-    (because browsers don't either).
-
-    The algorithm used is identical to that used by Django version 1.9.10.
-
-    .. versionadded:: 4.4.2
-    """
-    cookiedict = {}
-    for chunk in cookie.split(str(";")):
-        if str("=") in chunk:
-            key, val = chunk.split(str("="), 1)
-        else:
-            # Assume an empty name per
-            # https://bugzilla.mozilla.org/show_bug.cgi?id=169091
-            key, val = str(""), chunk
-        key, val = key.strip(), val.strip()
-        if key or val:
-            # unquote using Python's algorithm.
-            cookiedict[key] = _unquote_cookie(val)
-    return cookiedict
diff --git a/venv/lib/python3.7/site-packages/tornado/ioloop.py b/venv/lib/python3.7/site-packages/tornado/ioloop.py
deleted file mode 100644
index 02794cb..0000000
--- a/venv/lib/python3.7/site-packages/tornado/ioloop.py
+++ /dev/null
@@ -1,946 +0,0 @@
-#
-# Copyright 2009 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-"""An I/O event loop for non-blocking sockets.
-
-In Tornado 6.0, `.IOLoop` is a wrapper around the `asyncio` event
-loop, with a slightly different interface for historical reasons.
-Applications can use either the `.IOLoop` interface or the underlying
-`asyncio` event loop directly (unless compatibility with older
-versions of Tornado is desired, in which case `.IOLoop` must be used).
-
-Typical applications will use a single `IOLoop` object, accessed via
-`IOLoop.current` class method. The `IOLoop.start` method (or
-equivalently, `asyncio.AbstractEventLoop.run_forever`) should usually
-be called at the end of the ``main()`` function. Atypical applications
-may use more than one `IOLoop`, such as one `IOLoop` per thread, or
-per `unittest` case.
-
-"""
-
-import asyncio
-import concurrent.futures
-import datetime
-import functools
-import logging
-import numbers
-import os
-import sys
-import time
-import math
-import random
-
-from tornado.concurrent import (
-    Future,
-    is_future,
-    chain_future,
-    future_set_exc_info,
-    future_add_done_callback,
-)
-from tornado.log import app_log
-from tornado.util import Configurable, TimeoutError, import_object
-
-import typing
-from typing import Union, Any, Type, Optional, Callable, TypeVar, Tuple, Awaitable
-
-if typing.TYPE_CHECKING:
-    from typing import Dict, List  # noqa: F401
-
-    from typing_extensions import Protocol
-else:
-    Protocol = object
-
-
-class _Selectable(Protocol):
-    def fileno(self) -> int:
-        pass
-
-    def close(self) -> None:
-        pass
-
-
-_T = TypeVar("_T")
-_S = TypeVar("_S", bound=_Selectable)
-
-
-class IOLoop(Configurable):
-    """An I/O event loop.
-
-    As of Tornado 6.0, `IOLoop` is a wrapper around the `asyncio` event
-    loop.
-
-    Example usage for a simple TCP server:
-
-    .. testcode::
-
-        import errno
-        import functools
-        import socket
-
-        import tornado.ioloop
-        from tornado.iostream import IOStream
-
-        async def handle_connection(connection, address):
-            stream = IOStream(connection)
-            message = await stream.read_until_close()
-            print("message from client:", message.decode().strip())
-
-        def connection_ready(sock, fd, events):
-            while True:
-                try:
-                    connection, address = sock.accept()
-                except socket.error as e:
-                    if e.args[0] not in (errno.EWOULDBLOCK, errno.EAGAIN):
-                        raise
-                    return
-                connection.setblocking(0)
-                io_loop = tornado.ioloop.IOLoop.current()
-                io_loop.spawn_callback(handle_connection, connection, address)
-
-        if __name__ == '__main__':
-            sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0)
-            sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
-            sock.setblocking(0)
-            sock.bind(("", 8888))
-            sock.listen(128)
-
-            io_loop = tornado.ioloop.IOLoop.current()
-            callback = functools.partial(connection_ready, sock)
-            io_loop.add_handler(sock.fileno(), callback, io_loop.READ)
-            io_loop.start()
-
-    .. testoutput::
-       :hide:
-
-    By default, a newly-constructed `IOLoop` becomes the thread's current
-    `IOLoop`, unless there already is a current `IOLoop`. This behavior
-    can be controlled with the ``make_current`` argument to the `IOLoop`
-    constructor: if ``make_current=True``, the new `IOLoop` will always
-    try to become current and it raises an error if there is already a
-    current instance. If ``make_current=False``, the new `IOLoop` will
-    not try to become current.
-
-    In general, an `IOLoop` cannot survive a fork or be shared across
-    processes in any way. When multiple processes are being used, each
-    process should create its own `IOLoop`, which also implies that
-    any objects which depend on the `IOLoop` (such as
-    `.AsyncHTTPClient`) must also be created in the child processes.
-    As a guideline, anything that starts processes (including the
-    `tornado.process` and `multiprocessing` modules) should do so as
-    early as possible, ideally the first thing the application does
-    after loading its configuration in ``main()``.
-
-    .. versionchanged:: 4.2
-       Added the ``make_current`` keyword argument to the `IOLoop`
-       constructor.
-
-    .. versionchanged:: 5.0
-
-       Uses the `asyncio` event loop by default. The
-       ``IOLoop.configure`` method cannot be used on Python 3 except
-       to redundantly specify the `asyncio` event loop.
-
-    """
-
-    # These constants were originally based on constants from the epoll module.
-    NONE = 0
-    READ = 0x001
-    WRITE = 0x004
-    ERROR = 0x018
-
-    # In Python 3, _ioloop_for_asyncio maps from asyncio loops to IOLoops.
-    _ioloop_for_asyncio = dict()  # type: Dict[asyncio.AbstractEventLoop, IOLoop]
-
-    @classmethod
-    def configure(
-        cls, impl: "Union[None, str, Type[Configurable]]", **kwargs: Any
-    ) -> None:
-        if asyncio is not None:
-            from tornado.platform.asyncio import BaseAsyncIOLoop
-
-            if isinstance(impl, str):
-                impl = import_object(impl)
-            if isinstance(impl, type) and not issubclass(impl, BaseAsyncIOLoop):
-                raise RuntimeError(
-                    "only AsyncIOLoop is allowed when asyncio is available"
-                )
-        super(IOLoop, cls).configure(impl, **kwargs)
-
-    @staticmethod
-    def instance() -> "IOLoop":
-        """Deprecated alias for `IOLoop.current()`.
-
-        .. versionchanged:: 5.0
-
-           Previously, this method returned a global singleton
-           `IOLoop`, in contrast with the per-thread `IOLoop` returned
-           by `current()`. In nearly all cases the two were the same
-           (when they differed, it was generally used from non-Tornado
-           threads to communicate back to the main thread's `IOLoop`).
-           This distinction is not present in `asyncio`, so in order
-           to facilitate integration with that package `instance()`
-           was changed to be an alias to `current()`. Applications
-           using the cross-thread communications aspect of
-           `instance()` should instead set their own global variable
-           to point to the `IOLoop` they want to use.
-
-        .. deprecated:: 5.0
-        """
-        return IOLoop.current()
-
-    def install(self) -> None:
-        """Deprecated alias for `make_current()`.
-
-        .. versionchanged:: 5.0
-
-           Previously, this method would set this `IOLoop` as the
-           global singleton used by `IOLoop.instance()`. Now that
-           `instance()` is an alias for `current()`, `install()`
-           is an alias for `make_current()`.
-
-        .. deprecated:: 5.0
-        """
-        self.make_current()
-
-    @staticmethod
-    def clear_instance() -> None:
-        """Deprecated alias for `clear_current()`.
-
-        .. versionchanged:: 5.0
-
-           Previously, this method would clear the `IOLoop` used as
-           the global singleton by `IOLoop.instance()`. Now that
-           `instance()` is an alias for `current()`,
-           `clear_instance()` is an alias for `clear_current()`.
-
-        .. deprecated:: 5.0
-
-        """
-        IOLoop.clear_current()
-
-    @typing.overload
-    @staticmethod
-    def current() -> "IOLoop":
-        pass
-
-    @typing.overload  # noqa: F811
-    @staticmethod
-    def current(instance: bool = True) -> Optional["IOLoop"]:
-        pass
-
-    @staticmethod  # noqa: F811
-    def current(instance: bool = True) -> Optional["IOLoop"]:
-        """Returns the current thread's `IOLoop`.
-
-        If an `IOLoop` is currently running or has been marked as
-        current by `make_current`, returns that instance.  If there is
-        no current `IOLoop` and ``instance`` is true, creates one.
-
-        .. versionchanged:: 4.1
-           Added ``instance`` argument to control the fallback to
-           `IOLoop.instance()`.
-        .. versionchanged:: 5.0
-           On Python 3, control of the current `IOLoop` is delegated
-           to `asyncio`, with this and other methods as pass-through accessors.
-           The ``instance`` argument now controls whether an `IOLoop`
-           is created automatically when there is none, instead of
-           whether we fall back to `IOLoop.instance()` (which is now
-           an alias for this method). ``instance=False`` is deprecated,
-           since even if we do not create an `IOLoop`, this method
-           may initialize the asyncio loop.
-        """
-        try:
-            loop = asyncio.get_event_loop()
-        except (RuntimeError, AssertionError):
-            if not instance:
-                return None
-            raise
-        try:
-            return IOLoop._ioloop_for_asyncio[loop]
-        except KeyError:
-            if instance:
-                from tornado.platform.asyncio import AsyncIOMainLoop
-
-                current = AsyncIOMainLoop(make_current=True)  # type: Optional[IOLoop]
-            else:
-                current = None
-        return current
-
-    def make_current(self) -> None:
-        """Makes this the `IOLoop` for the current thread.
-
-        An `IOLoop` automatically becomes current for its thread
-        when it is started, but it is sometimes useful to call
-        `make_current` explicitly before starting the `IOLoop`,
-        so that code run at startup time can find the right
-        instance.
-
-        .. versionchanged:: 4.1
-           An `IOLoop` created while there is no current `IOLoop`
-           will automatically become current.
-
-        .. versionchanged:: 5.0
-           This method also sets the current `asyncio` event loop.
-        """
-        # The asyncio event loops override this method.
-        raise NotImplementedError()
-
-    @staticmethod
-    def clear_current() -> None:
-        """Clears the `IOLoop` for the current thread.
-
-        Intended primarily for use by test frameworks in between tests.
-
-        .. versionchanged:: 5.0
-           This method also clears the current `asyncio` event loop.
-        """
-        old = IOLoop.current(instance=False)
-        if old is not None:
-            old._clear_current_hook()
-        if asyncio is None:
-            IOLoop._current.instance = None
-
-    def _clear_current_hook(self) -> None:
-        """Instance method called when an IOLoop ceases to be current.
-
-        May be overridden by subclasses as a counterpart to make_current.
-        """
-        pass
-
-    @classmethod
-    def configurable_base(cls) -> Type[Configurable]:
-        return IOLoop
-
-    @classmethod
-    def configurable_default(cls) -> Type[Configurable]:
-        from tornado.platform.asyncio import AsyncIOLoop
-
-        return AsyncIOLoop
-
-    def initialize(self, make_current: bool = None) -> None:
-        if make_current is None:
-            if IOLoop.current(instance=False) is None:
-                self.make_current()
-        elif make_current:
-            current = IOLoop.current(instance=False)
-            # AsyncIO loops can already be current by this point.
-            if current is not None and current is not self:
-                raise RuntimeError("current IOLoop already exists")
-            self.make_current()
-
-    def close(self, all_fds: bool = False) -> None:
-        """Closes the `IOLoop`, freeing any resources used.
-
-        If ``all_fds`` is true, all file descriptors registered on the
-        IOLoop will be closed (not just the ones created by the
-        `IOLoop` itself).
-
-        Many applications will only use a single `IOLoop` that runs for the
-        entire lifetime of the process.  In that case closing the `IOLoop`
-        is not necessary since everything will be cleaned up when the
-        process exits.  `IOLoop.close` is provided mainly for scenarios
-        such as unit tests, which create and destroy a large number of
-        ``IOLoops``.
-
-        An `IOLoop` must be completely stopped before it can be closed.  This
-        means that `IOLoop.stop()` must be called *and* `IOLoop.start()` must
-        be allowed to return before attempting to call `IOLoop.close()`.
-        Therefore the call to `close` will usually appear just after
-        the call to `start` rather than near the call to `stop`.
-
-        .. versionchanged:: 3.1
-           If the `IOLoop` implementation supports non-integer objects
-           for "file descriptors", those objects will have their
-           ``close`` method when ``all_fds`` is true.
-        """
-        raise NotImplementedError()
-
-    @typing.overload
-    def add_handler(
-        self, fd: int, handler: Callable[[int, int], None], events: int
-    ) -> None:
-        pass
-
-    @typing.overload  # noqa: F811
-    def add_handler(
-        self, fd: _S, handler: Callable[[_S, int], None], events: int
-    ) -> None:
-        pass
-
-    def add_handler(  # noqa: F811
-        self, fd: Union[int, _Selectable], handler: Callable[..., None], events: int
-    ) -> None:
-        """Registers the given handler to receive the given events for ``fd``.
-
-        The ``fd`` argument may either be an integer file descriptor or
-        a file-like object with a ``fileno()`` and ``close()`` method.
-
-        The ``events`` argument is a bitwise or of the constants
-        ``IOLoop.READ``, ``IOLoop.WRITE``, and ``IOLoop.ERROR``.
-
-        When an event occurs, ``handler(fd, events)`` will be run.
-
-        .. versionchanged:: 4.0
-           Added the ability to pass file-like objects in addition to
-           raw file descriptors.
-        """
-        raise NotImplementedError()
-
-    def update_handler(self, fd: Union[int, _Selectable], events: int) -> None:
-        """Changes the events we listen for ``fd``.
-
-        .. versionchanged:: 4.0
-           Added the ability to pass file-like objects in addition to
-           raw file descriptors.
-        """
-        raise NotImplementedError()
-
-    def remove_handler(self, fd: Union[int, _Selectable]) -> None:
-        """Stop listening for events on ``fd``.
-
-        .. versionchanged:: 4.0
-           Added the ability to pass file-like objects in addition to
-           raw file descriptors.
-        """
-        raise NotImplementedError()
-
-    def start(self) -> None:
-        """Starts the I/O loop.
-
-        The loop will run until one of the callbacks calls `stop()`, which
-        will make the loop stop after the current event iteration completes.
-        """
-        raise NotImplementedError()
-
-    def _setup_logging(self) -> None:
-        """The IOLoop catches and logs exceptions, so it's
-        important that log output be visible.  However, python's
-        default behavior for non-root loggers (prior to python
-        3.2) is to print an unhelpful "no handlers could be
-        found" message rather than the actual log entry, so we
-        must explicitly configure logging if we've made it this
-        far without anything.
-
-        This method should be called from start() in subclasses.
-        """
-        if not any(
-            [
-                logging.getLogger().handlers,
-                logging.getLogger("tornado").handlers,
-                logging.getLogger("tornado.application").handlers,
-            ]
-        ):
-            logging.basicConfig()
-
-    def stop(self) -> None:
-        """Stop the I/O loop.
-
-        If the event loop is not currently running, the next call to `start()`
-        will return immediately.
-
-        Note that even after `stop` has been called, the `IOLoop` is not
-        completely stopped until `IOLoop.start` has also returned.
-        Some work that was scheduled before the call to `stop` may still
-        be run before the `IOLoop` shuts down.
-        """
-        raise NotImplementedError()
-
-    def run_sync(self, func: Callable, timeout: float = None) -> Any:
-        """Starts the `IOLoop`, runs the given function, and stops the loop.
-
-        The function must return either an awaitable object or
-        ``None``. If the function returns an awaitable object, the
-        `IOLoop` will run until the awaitable is resolved (and
-        `run_sync()` will return the awaitable's result). If it raises
-        an exception, the `IOLoop` will stop and the exception will be
-        re-raised to the caller.
-
-        The keyword-only argument ``timeout`` may be used to set
-        a maximum duration for the function.  If the timeout expires,
-        a `tornado.util.TimeoutError` is raised.
-
-        This method is useful to allow asynchronous calls in a
-        ``main()`` function::
-
-            async def main():
-                # do stuff...
-
-            if __name__ == '__main__':
-                IOLoop.current().run_sync(main)
-
-        .. versionchanged:: 4.3
-           Returning a non-``None``, non-awaitable value is now an error.
-
-        .. versionchanged:: 5.0
-           If a timeout occurs, the ``func`` coroutine will be cancelled.
-
-        """
-        future_cell = [None]  # type: List[Optional[Future]]
-
-        def run() -> None:
-            try:
-                result = func()
-                if result is not None:
-                    from tornado.gen import convert_yielded
-
-                    result = convert_yielded(result)
-            except Exception:
-                fut = Future()  # type: Future[Any]
-                future_cell[0] = fut
-                future_set_exc_info(fut, sys.exc_info())
-            else:
-                if is_future(result):
-                    future_cell[0] = result
-                else:
-                    fut = Future()
-                    future_cell[0] = fut
-                    fut.set_result(result)
-            assert future_cell[0] is not None
-            self.add_future(future_cell[0], lambda future: self.stop())
-
-        self.add_callback(run)
-        if timeout is not None:
-
-            def timeout_callback() -> None:
-                # If we can cancel the future, do so and wait on it. If not,
-                # Just stop the loop and return with the task still pending.
-                # (If we neither cancel nor wait for the task, a warning
-                # will be logged).
-                assert future_cell[0] is not None
-                if not future_cell[0].cancel():
-                    self.stop()
-
-            timeout_handle = self.add_timeout(self.time() + timeout, timeout_callback)
-        self.start()
-        if timeout is not None:
-            self.remove_timeout(timeout_handle)
-        assert future_cell[0] is not None
-        if future_cell[0].cancelled() or not future_cell[0].done():
-            raise TimeoutError("Operation timed out after %s seconds" % timeout)
-        return future_cell[0].result()
-
-    def time(self) -> float:
-        """Returns the current time according to the `IOLoop`'s clock.
-
-        The return value is a floating-point number relative to an
-        unspecified time in the past.
-
-        Historically, the IOLoop could be customized to use e.g.
-        `time.monotonic` instead of `time.time`, but this is not
-        currently supported and so this method is equivalent to
-        `time.time`.
-
-        """
-        return time.time()
-
-    def add_timeout(
-        self,
-        deadline: Union[float, datetime.timedelta],
-        callback: Callable[..., None],
-        *args: Any,
-        **kwargs: Any
-    ) -> object:
-        """Runs the ``callback`` at the time ``deadline`` from the I/O loop.
-
-        Returns an opaque handle that may be passed to
-        `remove_timeout` to cancel.
-
-        ``deadline`` may be a number denoting a time (on the same
-        scale as `IOLoop.time`, normally `time.time`), or a
-        `datetime.timedelta` object for a deadline relative to the
-        current time.  Since Tornado 4.0, `call_later` is a more
-        convenient alternative for the relative case since it does not
-        require a timedelta object.
-
-        Note that it is not safe to call `add_timeout` from other threads.
-        Instead, you must use `add_callback` to transfer control to the
-        `IOLoop`'s thread, and then call `add_timeout` from there.
-
-        Subclasses of IOLoop must implement either `add_timeout` or
-        `call_at`; the default implementations of each will call
-        the other.  `call_at` is usually easier to implement, but
-        subclasses that wish to maintain compatibility with Tornado
-        versions prior to 4.0 must use `add_timeout` instead.
-
-        .. versionchanged:: 4.0
-           Now passes through ``*args`` and ``**kwargs`` to the callback.
-        """
-        if isinstance(deadline, numbers.Real):
-            return self.call_at(deadline, callback, *args, **kwargs)
-        elif isinstance(deadline, datetime.timedelta):
-            return self.call_at(
-                self.time() + deadline.total_seconds(), callback, *args, **kwargs
-            )
-        else:
-            raise TypeError("Unsupported deadline %r" % deadline)
-
-    def call_later(
-        self, delay: float, callback: Callable[..., None], *args: Any, **kwargs: Any
-    ) -> object:
-        """Runs the ``callback`` after ``delay`` seconds have passed.
-
-        Returns an opaque handle that may be passed to `remove_timeout`
-        to cancel.  Note that unlike the `asyncio` method of the same
-        name, the returned object does not have a ``cancel()`` method.
-
-        See `add_timeout` for comments on thread-safety and subclassing.
-
-        .. versionadded:: 4.0
-        """
-        return self.call_at(self.time() + delay, callback, *args, **kwargs)
-
-    def call_at(
-        self, when: float, callback: Callable[..., None], *args: Any, **kwargs: Any
-    ) -> object:
-        """Runs the ``callback`` at the absolute time designated by ``when``.
-
-        ``when`` must be a number using the same reference point as
-        `IOLoop.time`.
-
-        Returns an opaque handle that may be passed to `remove_timeout`
-        to cancel.  Note that unlike the `asyncio` method of the same
-        name, the returned object does not have a ``cancel()`` method.
-
-        See `add_timeout` for comments on thread-safety and subclassing.
-
-        .. versionadded:: 4.0
-        """
-        return self.add_timeout(when, callback, *args, **kwargs)
-
-    def remove_timeout(self, timeout: object) -> None:
-        """Cancels a pending timeout.
-
-        The argument is a handle as returned by `add_timeout`.  It is
-        safe to call `remove_timeout` even if the callback has already
-        been run.
-        """
-        raise NotImplementedError()
-
-    def add_callback(self, callback: Callable, *args: Any, **kwargs: Any) -> None:
-        """Calls the given callback on the next I/O loop iteration.
-
-        It is safe to call this method from any thread at any time,
-        except from a signal handler.  Note that this is the **only**
-        method in `IOLoop` that makes this thread-safety guarantee; all
-        other interaction with the `IOLoop` must be done from that
-        `IOLoop`'s thread.  `add_callback()` may be used to transfer
-        control from other threads to the `IOLoop`'s thread.
-
-        To add a callback from a signal handler, see
-        `add_callback_from_signal`.
-        """
-        raise NotImplementedError()
-
-    def add_callback_from_signal(
-        self, callback: Callable, *args: Any, **kwargs: Any
-    ) -> None:
-        """Calls the given callback on the next I/O loop iteration.
-
-        Safe for use from a Python signal handler; should not be used
-        otherwise.
-        """
-        raise NotImplementedError()
-
-    def spawn_callback(self, callback: Callable, *args: Any, **kwargs: Any) -> None:
-        """Calls the given callback on the next IOLoop iteration.
-
-        As of Tornado 6.0, this method is equivalent to `add_callback`.
-
-        .. versionadded:: 4.0
-        """
-        self.add_callback(callback, *args, **kwargs)
-
-    def add_future(
-        self,
-        future: "Union[Future[_T], concurrent.futures.Future[_T]]",
-        callback: Callable[["Future[_T]"], None],
-    ) -> None:
-        """Schedules a callback on the ``IOLoop`` when the given
-        `.Future` is finished.
-
-        The callback is invoked with one argument, the
-        `.Future`.
-
-        This method only accepts `.Future` objects and not other
-        awaitables (unlike most of Tornado where the two are
-        interchangeable).
-        """
-        if isinstance(future, Future):
-            # Note that we specifically do not want the inline behavior of
-            # tornado.concurrent.future_add_done_callback. We always want
-            # this callback scheduled on the next IOLoop iteration (which
-            # asyncio.Future always does).
-            #
-            # Wrap the callback in self._run_callback so we control
-            # the error logging (i.e. it goes to tornado.log.app_log
-            # instead of asyncio's log).
-            future.add_done_callback(
-                lambda f: self._run_callback(functools.partial(callback, future))
-            )
-        else:
-            assert is_future(future)
-            # For concurrent futures, we use self.add_callback, so
-            # it's fine if future_add_done_callback inlines that call.
-            future_add_done_callback(
-                future, lambda f: self.add_callback(callback, future)
-            )
-
-    def run_in_executor(
-        self,
-        executor: Optional[concurrent.futures.Executor],
-        func: Callable[..., _T],
-        *args: Any
-    ) -> Awaitable[_T]:
-        """Runs a function in a ``concurrent.futures.Executor``. If
-        ``executor`` is ``None``, the IO loop's default executor will be used.
-
-        Use `functools.partial` to pass keyword arguments to ``func``.
-
-        .. versionadded:: 5.0
-        """
-        if executor is None:
-            if not hasattr(self, "_executor"):
-                from tornado.process import cpu_count
-
-                self._executor = concurrent.futures.ThreadPoolExecutor(
-                    max_workers=(cpu_count() * 5)
-                )  # type: concurrent.futures.Executor
-            executor = self._executor
-        c_future = executor.submit(func, *args)
-        # Concurrent Futures are not usable with await. Wrap this in a
-        # Tornado Future instead, using self.add_future for thread-safety.
-        t_future = Future()  # type: Future[_T]
-        self.add_future(c_future, lambda f: chain_future(f, t_future))
-        return t_future
-
-    def set_default_executor(self, executor: concurrent.futures.Executor) -> None:
-        """Sets the default executor to use with :meth:`run_in_executor`.
-
-        .. versionadded:: 5.0
-        """
-        self._executor = executor
-
-    def _run_callback(self, callback: Callable[[], Any]) -> None:
-        """Runs a callback with error handling.
-
-        .. versionchanged:: 6.0
-
-           CancelledErrors are no longer logged.
-        """
-        try:
-            ret = callback()
-            if ret is not None:
-                from tornado import gen
-
-                # Functions that return Futures typically swallow all
-                # exceptions and store them in the Future.  If a Future
-                # makes it out to the IOLoop, ensure its exception (if any)
-                # gets logged too.
-                try:
-                    ret = gen.convert_yielded(ret)
-                except gen.BadYieldError:
-                    # It's not unusual for add_callback to be used with
-                    # methods returning a non-None and non-yieldable
-                    # result, which should just be ignored.
-                    pass
-                else:
-                    self.add_future(ret, self._discard_future_result)
-        except asyncio.CancelledError:
-            pass
-        except Exception:
-            app_log.error("Exception in callback %r", callback, exc_info=True)
-
-    def _discard_future_result(self, future: Future) -> None:
-        """Avoid unhandled-exception warnings from spawned coroutines."""
-        future.result()
-
-    def split_fd(
-        self, fd: Union[int, _Selectable]
-    ) -> Tuple[int, Union[int, _Selectable]]:
-        # """Returns an (fd, obj) pair from an ``fd`` parameter.
-
-        # We accept both raw file descriptors and file-like objects as
-        # input to `add_handler` and related methods.  When a file-like
-        # object is passed, we must retain the object itself so we can
-        # close it correctly when the `IOLoop` shuts down, but the
-        # poller interfaces favor file descriptors (they will accept
-        # file-like objects and call ``fileno()`` for you, but they
-        # always return the descriptor itself).
-
-        # This method is provided for use by `IOLoop` subclasses and should
-        # not generally be used by application code.
-
-        # .. versionadded:: 4.0
-        # """
-        if isinstance(fd, int):
-            return fd, fd
-        return fd.fileno(), fd
-
-    def close_fd(self, fd: Union[int, _Selectable]) -> None:
-        # """Utility method to close an ``fd``.
-
-        # If ``fd`` is a file-like object, we close it directly; otherwise
-        # we use `os.close`.
-
-        # This method is provided for use by `IOLoop` subclasses (in
-        # implementations of ``IOLoop.close(all_fds=True)`` and should
-        # not generally be used by application code.
-
-        # .. versionadded:: 4.0
-        # """
-        try:
-            if isinstance(fd, int):
-                os.close(fd)
-            else:
-                fd.close()
-        except OSError:
-            pass
-
-
-class _Timeout(object):
-    """An IOLoop timeout, a UNIX timestamp and a callback"""
-
-    # Reduce memory overhead when there are lots of pending callbacks
-    __slots__ = ["deadline", "callback", "tdeadline"]
-
-    def __init__(
-        self, deadline: float, callback: Callable[[], None], io_loop: IOLoop
-    ) -> None:
-        if not isinstance(deadline, numbers.Real):
-            raise TypeError("Unsupported deadline %r" % deadline)
-        self.deadline = deadline
-        self.callback = callback
-        self.tdeadline = (
-            deadline,
-            next(io_loop._timeout_counter),
-        )  # type: Tuple[float, int]
-
-    # Comparison methods to sort by deadline, with object id as a tiebreaker
-    # to guarantee a consistent ordering.  The heapq module uses __le__
-    # in python2.5, and __lt__ in 2.6+ (sort() and most other comparisons
-    # use __lt__).
-    def __lt__(self, other: "_Timeout") -> bool:
-        return self.tdeadline < other.tdeadline
-
-    def __le__(self, other: "_Timeout") -> bool:
-        return self.tdeadline <= other.tdeadline
-
-
-class PeriodicCallback(object):
-    """Schedules the given callback to be called periodically.
-
-    The callback is called every ``callback_time`` milliseconds.
-    Note that the timeout is given in milliseconds, while most other
-    time-related functions in Tornado use seconds.
-
-    If ``jitter`` is specified, each callback time will be randomly selected
-    within a window of ``jitter * callback_time`` milliseconds.
-    Jitter can be used to reduce alignment of events with similar periods.
-    A jitter of 0.1 means allowing a 10% variation in callback time.
-    The window is centered on ``callback_time`` so the total number of calls
-    within a given interval should not be significantly affected by adding
-    jitter.
-
-    If the callback runs for longer than ``callback_time`` milliseconds,
-    subsequent invocations will be skipped to get back on schedule.
-
-    `start` must be called after the `PeriodicCallback` is created.
-
-    .. versionchanged:: 5.0
-       The ``io_loop`` argument (deprecated since version 4.1) has been removed.
-
-    .. versionchanged:: 5.1
-       The ``jitter`` argument is added.
-    """
-
-    def __init__(
-        self, callback: Callable[[], None], callback_time: float, jitter: float = 0
-    ) -> None:
-        self.callback = callback
-        if callback_time <= 0:
-            raise ValueError("Periodic callback must have a positive callback_time")
-        self.callback_time = callback_time
-        self.jitter = jitter
-        self._running = False
-        self._timeout = None  # type: object
-
-    def start(self) -> None:
-        """Starts the timer."""
-        # Looking up the IOLoop here allows to first instantiate the
-        # PeriodicCallback in another thread, then start it using
-        # IOLoop.add_callback().
-        self.io_loop = IOLoop.current()
-        self._running = True
-        self._next_timeout = self.io_loop.time()
-        self._schedule_next()
-
-    def stop(self) -> None:
-        """Stops the timer."""
-        self._running = False
-        if self._timeout is not None:
-            self.io_loop.remove_timeout(self._timeout)
-            self._timeout = None
-
-    def is_running(self) -> bool:
-        """Returns ``True`` if this `.PeriodicCallback` has been started.
-
-        .. versionadded:: 4.1
-        """
-        return self._running
-
-    def _run(self) -> None:
-        if not self._running:
-            return
-        try:
-            return self.callback()
-        except Exception:
-            app_log.error("Exception in callback %r", self.callback, exc_info=True)
-        finally:
-            self._schedule_next()
-
-    def _schedule_next(self) -> None:
-        if self._running:
-            self._update_next(self.io_loop.time())
-            self._timeout = self.io_loop.add_timeout(self._next_timeout, self._run)
-
-    def _update_next(self, current_time: float) -> None:
-        callback_time_sec = self.callback_time / 1000.0
-        if self.jitter:
-            # apply jitter fraction
-            callback_time_sec *= 1 + (self.jitter * (random.random() - 0.5))
-        if self._next_timeout <= current_time:
-            # The period should be measured from the start of one call
-            # to the start of the next. If one call takes too long,
-            # skip cycles to get back to a multiple of the original
-            # schedule.
-            self._next_timeout += (
-                math.floor((current_time - self._next_timeout) / callback_time_sec) + 1
-            ) * callback_time_sec
-        else:
-            # If the clock moved backwards, ensure we advance the next
-            # timeout instead of recomputing the same value again.
-            # This may result in long gaps between callbacks if the
-            # clock jumps backwards by a lot, but the far more common
-            # scenario is a small NTP adjustment that should just be
-            # ignored.
-            #
-            # Note that on some systems if time.time() runs slower
-            # than time.monotonic() (most common on windows), we
-            # effectively experience a small backwards time jump on
-            # every iteration because PeriodicCallback uses
-            # time.time() while asyncio schedules callbacks using
-            # time.monotonic().
-            # https://github.com/tornadoweb/tornado/issues/2333
-            self._next_timeout += callback_time_sec
diff --git a/venv/lib/python3.7/site-packages/tornado/iostream.py b/venv/lib/python3.7/site-packages/tornado/iostream.py
deleted file mode 100644
index ee30592..0000000
--- a/venv/lib/python3.7/site-packages/tornado/iostream.py
+++ /dev/null
@@ -1,1655 +0,0 @@
-#
-# Copyright 2009 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-"""Utility classes to write to and read from non-blocking files and sockets.
-
-Contents:
-
-* `BaseIOStream`: Generic interface for reading and writing.
-* `IOStream`: Implementation of BaseIOStream using non-blocking sockets.
-* `SSLIOStream`: SSL-aware version of IOStream.
-* `PipeIOStream`: Pipe-based IOStream implementation.
-"""
-
-import asyncio
-import collections
-import errno
-import io
-import numbers
-import os
-import socket
-import ssl
-import sys
-import re
-
-from tornado.concurrent import Future, future_set_result_unless_cancelled
-from tornado import ioloop
-from tornado.log import gen_log
-from tornado.netutil import ssl_wrap_socket, _client_ssl_defaults, _server_ssl_defaults
-from tornado.util import errno_from_exception
-
-import typing
-from typing import (
-    Union,
-    Optional,
-    Awaitable,
-    Callable,
-    Pattern,
-    Any,
-    Dict,
-    TypeVar,
-    Tuple,
-)
-from types import TracebackType
-
-if typing.TYPE_CHECKING:
-    from typing import Deque, List, Type  # noqa: F401
-
-_IOStreamType = TypeVar("_IOStreamType", bound="IOStream")
-
-try:
-    from tornado.platform.posix import _set_nonblocking
-except ImportError:
-    _set_nonblocking = None  # type: ignore
-
-# These errnos indicate that a non-blocking operation must be retried
-# at a later time.  On most platforms they're the same value, but on
-# some they differ.
-_ERRNO_WOULDBLOCK = (errno.EWOULDBLOCK, errno.EAGAIN)
-
-if hasattr(errno, "WSAEWOULDBLOCK"):
-    _ERRNO_WOULDBLOCK += (errno.WSAEWOULDBLOCK,)  # type: ignore
-
-# These errnos indicate that a connection has been abruptly terminated.
-# They should be caught and handled less noisily than other errors.
-_ERRNO_CONNRESET = (errno.ECONNRESET, errno.ECONNABORTED, errno.EPIPE, errno.ETIMEDOUT)
-
-if hasattr(errno, "WSAECONNRESET"):
-    _ERRNO_CONNRESET += (  # type: ignore
-        errno.WSAECONNRESET,  # type: ignore
-        errno.WSAECONNABORTED,  # type: ignore
-        errno.WSAETIMEDOUT,  # type: ignore
-    )
-
-if sys.platform == "darwin":
-    # OSX appears to have a race condition that causes send(2) to return
-    # EPROTOTYPE if called while a socket is being torn down:
-    # http://erickt.github.io/blog/2014/11/19/adventures-in-debugging-a-potential-osx-kernel-bug/
-    # Since the socket is being closed anyway, treat this as an ECONNRESET
-    # instead of an unexpected error.
-    _ERRNO_CONNRESET += (errno.EPROTOTYPE,)  # type: ignore
-
-# More non-portable errnos:
-_ERRNO_INPROGRESS = (errno.EINPROGRESS,)
-
-if hasattr(errno, "WSAEINPROGRESS"):
-    _ERRNO_INPROGRESS += (errno.WSAEINPROGRESS,)  # type: ignore
-
-_WINDOWS = sys.platform.startswith("win")
-
-
-class StreamClosedError(IOError):
-    """Exception raised by `IOStream` methods when the stream is closed.
-
-    Note that the close callback is scheduled to run *after* other
-    callbacks on the stream (to allow for buffered data to be processed),
-    so you may see this error before you see the close callback.
-
-    The ``real_error`` attribute contains the underlying error that caused
-    the stream to close (if any).
-
-    .. versionchanged:: 4.3
-       Added the ``real_error`` attribute.
-    """
-
-    def __init__(self, real_error: BaseException = None) -> None:
-        super(StreamClosedError, self).__init__("Stream is closed")
-        self.real_error = real_error
-
-
-class UnsatisfiableReadError(Exception):
-    """Exception raised when a read cannot be satisfied.
-
-    Raised by ``read_until`` and ``read_until_regex`` with a ``max_bytes``
-    argument.
-    """
-
-    pass
-
-
-class StreamBufferFullError(Exception):
-    """Exception raised by `IOStream` methods when the buffer is full.
-    """
-
-
-class _StreamBuffer(object):
-    """
-    A specialized buffer that tries to avoid copies when large pieces
-    of data are encountered.
-    """
-
-    def __init__(self) -> None:
-        # A sequence of (False, bytearray) and (True, memoryview) objects
-        self._buffers = (
-            collections.deque()
-        )  # type: Deque[Tuple[bool, Union[bytearray, memoryview]]]
-        # Position in the first buffer
-        self._first_pos = 0
-        self._size = 0
-
-    def __len__(self) -> int:
-        return self._size
-
-    # Data above this size will be appended separately instead
-    # of extending an existing bytearray
-    _large_buf_threshold = 2048
-
-    def append(self, data: Union[bytes, bytearray, memoryview]) -> None:
-        """
-        Append the given piece of data (should be a buffer-compatible object).
-        """
-        size = len(data)
-        if size > self._large_buf_threshold:
-            if not isinstance(data, memoryview):
-                data = memoryview(data)
-            self._buffers.append((True, data))
-        elif size > 0:
-            if self._buffers:
-                is_memview, b = self._buffers[-1]
-                new_buf = is_memview or len(b) >= self._large_buf_threshold
-            else:
-                new_buf = True
-            if new_buf:
-                self._buffers.append((False, bytearray(data)))
-            else:
-                b += data  # type: ignore
-
-        self._size += size
-
-    def peek(self, size: int) -> memoryview:
-        """
-        Get a view over at most ``size`` bytes (possibly fewer) at the
-        current buffer position.
-        """
-        assert size > 0
-        try:
-            is_memview, b = self._buffers[0]
-        except IndexError:
-            return memoryview(b"")
-
-        pos = self._first_pos
-        if is_memview:
-            return typing.cast(memoryview, b[pos : pos + size])
-        else:
-            return memoryview(b)[pos : pos + size]
-
-    def advance(self, size: int) -> None:
-        """
-        Advance the current buffer position by ``size`` bytes.
-        """
-        assert 0 < size <= self._size
-        self._size -= size
-        pos = self._first_pos
-
-        buffers = self._buffers
-        while buffers and size > 0:
-            is_large, b = buffers[0]
-            b_remain = len(b) - size - pos
-            if b_remain <= 0:
-                buffers.popleft()
-                size -= len(b) - pos
-                pos = 0
-            elif is_large:
-                pos += size
-                size = 0
-            else:
-                # Amortized O(1) shrink for Python 2
-                pos += size
-                if len(b) <= 2 * pos:
-                    del typing.cast(bytearray, b)[:pos]
-                    pos = 0
-                size = 0
-
-        assert size == 0
-        self._first_pos = pos
-
-
-class BaseIOStream(object):
-    """A utility class to write to and read from a non-blocking file or socket.
-
-    We support a non-blocking ``write()`` and a family of ``read_*()``
-    methods. When the operation completes, the ``Awaitable`` will resolve
-    with the data read (or ``None`` for ``write()``). All outstanding
-    ``Awaitables`` will resolve with a `StreamClosedError` when the
-    stream is closed; `.BaseIOStream.set_close_callback` can also be used
-    to be notified of a closed stream.
-
-    When a stream is closed due to an error, the IOStream's ``error``
-    attribute contains the exception object.
-
-    Subclasses must implement `fileno`, `close_fd`, `write_to_fd`,
-    `read_from_fd`, and optionally `get_fd_error`.
-
-    """
-
-    def __init__(
-        self,
-        max_buffer_size: int = None,
-        read_chunk_size: int = None,
-        max_write_buffer_size: int = None,
-    ) -> None:
-        """`BaseIOStream` constructor.
-
-        :arg max_buffer_size: Maximum amount of incoming data to buffer;
-            defaults to 100MB.
-        :arg read_chunk_size: Amount of data to read at one time from the
-            underlying transport; defaults to 64KB.
-        :arg max_write_buffer_size: Amount of outgoing data to buffer;
-            defaults to unlimited.
-
-        .. versionchanged:: 4.0
-           Add the ``max_write_buffer_size`` parameter.  Changed default
-           ``read_chunk_size`` to 64KB.
-        .. versionchanged:: 5.0
-           The ``io_loop`` argument (deprecated since version 4.1) has been
-           removed.
-        """
-        self.io_loop = ioloop.IOLoop.current()
-        self.max_buffer_size = max_buffer_size or 104857600
-        # A chunk size that is too close to max_buffer_size can cause
-        # spurious failures.
-        self.read_chunk_size = min(read_chunk_size or 65536, self.max_buffer_size // 2)
-        self.max_write_buffer_size = max_write_buffer_size
-        self.error = None  # type: Optional[BaseException]
-        self._read_buffer = bytearray()
-        self._read_buffer_pos = 0
-        self._read_buffer_size = 0
-        self._user_read_buffer = False
-        self._after_user_read_buffer = None  # type: Optional[bytearray]
-        self._write_buffer = _StreamBuffer()
-        self._total_write_index = 0
-        self._total_write_done_index = 0
-        self._read_delimiter = None  # type: Optional[bytes]
-        self._read_regex = None  # type: Optional[Pattern]
-        self._read_max_bytes = None  # type: Optional[int]
-        self._read_bytes = None  # type: Optional[int]
-        self._read_partial = False
-        self._read_until_close = False
-        self._read_future = None  # type: Optional[Future]
-        self._write_futures = (
-            collections.deque()
-        )  # type: Deque[Tuple[int, Future[None]]]
-        self._close_callback = None  # type: Optional[Callable[[], None]]
-        self._connect_future = None  # type: Optional[Future[IOStream]]
-        # _ssl_connect_future should be defined in SSLIOStream
-        # but it's here so we can clean it up in _signal_closed
-        # TODO: refactor that so subclasses can add additional futures
-        # to be cancelled.
-        self._ssl_connect_future = None  # type: Optional[Future[SSLIOStream]]
-        self._connecting = False
-        self._state = None  # type: Optional[int]
-        self._closed = False
-
-    def fileno(self) -> Union[int, ioloop._Selectable]:
-        """Returns the file descriptor for this stream."""
-        raise NotImplementedError()
-
-    def close_fd(self) -> None:
-        """Closes the file underlying this stream.
-
-        ``close_fd`` is called by `BaseIOStream` and should not be called
-        elsewhere; other users should call `close` instead.
-        """
-        raise NotImplementedError()
-
-    def write_to_fd(self, data: memoryview) -> int:
-        """Attempts to write ``data`` to the underlying file.
-
-        Returns the number of bytes written.
-        """
-        raise NotImplementedError()
-
-    def read_from_fd(self, buf: Union[bytearray, memoryview]) -> Optional[int]:
-        """Attempts to read from the underlying file.
-
-        Reads up to ``len(buf)`` bytes, storing them in the buffer.
-        Returns the number of bytes read. Returns None if there was
-        nothing to read (the socket returned `~errno.EWOULDBLOCK` or
-        equivalent), and zero on EOF.
-
-        .. versionchanged:: 5.0
-
-           Interface redesigned to take a buffer and return a number
-           of bytes instead of a freshly-allocated object.
-        """
-        raise NotImplementedError()
-
-    def get_fd_error(self) -> Optional[Exception]:
-        """Returns information about any error on the underlying file.
-
-        This method is called after the `.IOLoop` has signaled an error on the
-        file descriptor, and should return an Exception (such as `socket.error`
-        with additional information, or None if no such information is
-        available.
-        """
-        return None
-
-    def read_until_regex(self, regex: bytes, max_bytes: int = None) -> Awaitable[bytes]:
-        """Asynchronously read until we have matched the given regex.
-
-        The result includes the data that matches the regex and anything
-        that came before it.
-
-        If ``max_bytes`` is not None, the connection will be closed
-        if more than ``max_bytes`` bytes have been read and the regex is
-        not satisfied.
-
-        .. versionchanged:: 4.0
-            Added the ``max_bytes`` argument.  The ``callback`` argument is
-            now optional and a `.Future` will be returned if it is omitted.
-
-        .. versionchanged:: 6.0
-
-           The ``callback`` argument was removed. Use the returned
-           `.Future` instead.
-
-        """
-        future = self._start_read()
-        self._read_regex = re.compile(regex)
-        self._read_max_bytes = max_bytes
-        try:
-            self._try_inline_read()
-        except UnsatisfiableReadError as e:
-            # Handle this the same way as in _handle_events.
-            gen_log.info("Unsatisfiable read, closing connection: %s" % e)
-            self.close(exc_info=e)
-            return future
-        except:
-            # Ensure that the future doesn't log an error because its
-            # failure was never examined.
-            future.add_done_callback(lambda f: f.exception())
-            raise
-        return future
-
-    def read_until(self, delimiter: bytes, max_bytes: int = None) -> Awaitable[bytes]:
-        """Asynchronously read until we have found the given delimiter.
-
-        The result includes all the data read including the delimiter.
-
-        If ``max_bytes`` is not None, the connection will be closed
-        if more than ``max_bytes`` bytes have been read and the delimiter
-        is not found.
-
-        .. versionchanged:: 4.0
-            Added the ``max_bytes`` argument.  The ``callback`` argument is
-            now optional and a `.Future` will be returned if it is omitted.
-
-        .. versionchanged:: 6.0
-
-           The ``callback`` argument was removed. Use the returned
-           `.Future` instead.
-        """
-        future = self._start_read()
-        self._read_delimiter = delimiter
-        self._read_max_bytes = max_bytes
-        try:
-            self._try_inline_read()
-        except UnsatisfiableReadError as e:
-            # Handle this the same way as in _handle_events.
-            gen_log.info("Unsatisfiable read, closing connection: %s" % e)
-            self.close(exc_info=e)
-            return future
-        except:
-            future.add_done_callback(lambda f: f.exception())
-            raise
-        return future
-
-    def read_bytes(self, num_bytes: int, partial: bool = False) -> Awaitable[bytes]:
-        """Asynchronously read a number of bytes.
-
-        If ``partial`` is true, data is returned as soon as we have
-        any bytes to return (but never more than ``num_bytes``)
-
-        .. versionchanged:: 4.0
-            Added the ``partial`` argument.  The callback argument is now
-            optional and a `.Future` will be returned if it is omitted.
-
-        .. versionchanged:: 6.0
-
-           The ``callback`` and ``streaming_callback`` arguments have
-           been removed. Use the returned `.Future` (and
-           ``partial=True`` for ``streaming_callback``) instead.
-
-        """
-        future = self._start_read()
-        assert isinstance(num_bytes, numbers.Integral)
-        self._read_bytes = num_bytes
-        self._read_partial = partial
-        try:
-            self._try_inline_read()
-        except:
-            future.add_done_callback(lambda f: f.exception())
-            raise
-        return future
-
-    def read_into(self, buf: bytearray, partial: bool = False) -> Awaitable[int]:
-        """Asynchronously read a number of bytes.
-
-        ``buf`` must be a writable buffer into which data will be read.
-
-        If ``partial`` is true, the callback is run as soon as any bytes
-        have been read.  Otherwise, it is run when the ``buf`` has been
-        entirely filled with read data.
-
-        .. versionadded:: 5.0
-
-        .. versionchanged:: 6.0
-
-           The ``callback`` argument was removed. Use the returned
-           `.Future` instead.
-
-        """
-        future = self._start_read()
-
-        # First copy data already in read buffer
-        available_bytes = self._read_buffer_size
-        n = len(buf)
-        if available_bytes >= n:
-            end = self._read_buffer_pos + n
-            buf[:] = memoryview(self._read_buffer)[self._read_buffer_pos : end]
-            del self._read_buffer[:end]
-            self._after_user_read_buffer = self._read_buffer
-        elif available_bytes > 0:
-            buf[:available_bytes] = memoryview(self._read_buffer)[
-                self._read_buffer_pos :
-            ]
-
-        # Set up the supplied buffer as our temporary read buffer.
-        # The original (if it had any data remaining) has been
-        # saved for later.
-        self._user_read_buffer = True
-        self._read_buffer = buf
-        self._read_buffer_pos = 0
-        self._read_buffer_size = available_bytes
-        self._read_bytes = n
-        self._read_partial = partial
-
-        try:
-            self._try_inline_read()
-        except:
-            future.add_done_callback(lambda f: f.exception())
-            raise
-        return future
-
-    def read_until_close(self) -> Awaitable[bytes]:
-        """Asynchronously reads all data from the socket until it is closed.
-
-        This will buffer all available data until ``max_buffer_size``
-        is reached. If flow control or cancellation are desired, use a
-        loop with `read_bytes(partial=True) <.read_bytes>` instead.
-
-        .. versionchanged:: 4.0
-            The callback argument is now optional and a `.Future` will
-            be returned if it is omitted.
-
-        .. versionchanged:: 6.0
-
-           The ``callback`` and ``streaming_callback`` arguments have
-           been removed. Use the returned `.Future` (and `read_bytes`
-           with ``partial=True`` for ``streaming_callback``) instead.
-
-        """
-        future = self._start_read()
-        if self.closed():
-            self._finish_read(self._read_buffer_size, False)
-            return future
-        self._read_until_close = True
-        try:
-            self._try_inline_read()
-        except:
-            future.add_done_callback(lambda f: f.exception())
-            raise
-        return future
-
-    def write(self, data: Union[bytes, memoryview]) -> "Future[None]":
-        """Asynchronously write the given data to this stream.
-
-        This method returns a `.Future` that resolves (with a result
-        of ``None``) when the write has been completed.
-
-        The ``data`` argument may be of type `bytes` or `memoryview`.
-
-        .. versionchanged:: 4.0
-            Now returns a `.Future` if no callback is given.
-
-        .. versionchanged:: 4.5
-            Added support for `memoryview` arguments.
-
-        .. versionchanged:: 6.0
-
-           The ``callback`` argument was removed. Use the returned
-           `.Future` instead.
-
-        """
-        self._check_closed()
-        if data:
-            if (
-                self.max_write_buffer_size is not None
-                and len(self._write_buffer) + len(data) > self.max_write_buffer_size
-            ):
-                raise StreamBufferFullError("Reached maximum write buffer size")
-            self._write_buffer.append(data)
-            self._total_write_index += len(data)
-        future = Future()  # type: Future[None]
-        future.add_done_callback(lambda f: f.exception())
-        self._write_futures.append((self._total_write_index, future))
-        if not self._connecting:
-            self._handle_write()
-            if self._write_buffer:
-                self._add_io_state(self.io_loop.WRITE)
-            self._maybe_add_error_listener()
-        return future
-
-    def set_close_callback(self, callback: Optional[Callable[[], None]]) -> None:
-        """Call the given callback when the stream is closed.
-
-        This mostly is not necessary for applications that use the
-        `.Future` interface; all outstanding ``Futures`` will resolve
-        with a `StreamClosedError` when the stream is closed. However,
-        it is still useful as a way to signal that the stream has been
-        closed while no other read or write is in progress.
-
-        Unlike other callback-based interfaces, ``set_close_callback``
-        was not removed in Tornado 6.0.
-        """
-        self._close_callback = callback
-        self._maybe_add_error_listener()
-
-    def close(
-        self,
-        exc_info: Union[
-            None,
-            bool,
-            BaseException,
-            Tuple[
-                "Optional[Type[BaseException]]",
-                Optional[BaseException],
-                Optional[TracebackType],
-            ],
-        ] = False,
-    ) -> None:
-        """Close this stream.
-
-        If ``exc_info`` is true, set the ``error`` attribute to the current
-        exception from `sys.exc_info` (or if ``exc_info`` is a tuple,
-        use that instead of `sys.exc_info`).
-        """
-        if not self.closed():
-            if exc_info:
-                if isinstance(exc_info, tuple):
-                    self.error = exc_info[1]
-                elif isinstance(exc_info, BaseException):
-                    self.error = exc_info
-                else:
-                    exc_info = sys.exc_info()
-                    if any(exc_info):
-                        self.error = exc_info[1]
-            if self._read_until_close:
-                self._read_until_close = False
-                self._finish_read(self._read_buffer_size, False)
-            if self._state is not None:
-                self.io_loop.remove_handler(self.fileno())
-                self._state = None
-            self.close_fd()
-            self._closed = True
-        self._signal_closed()
-
-    def _signal_closed(self) -> None:
-        futures = []  # type: List[Future]
-        if self._read_future is not None:
-            futures.append(self._read_future)
-            self._read_future = None
-        futures += [future for _, future in self._write_futures]
-        self._write_futures.clear()
-        if self._connect_future is not None:
-            futures.append(self._connect_future)
-            self._connect_future = None
-        for future in futures:
-            if not future.done():
-                future.set_exception(StreamClosedError(real_error=self.error))
-            # Reference the exception to silence warnings. Annoyingly,
-            # this raises if the future was cancelled, but just
-            # returns any other error.
-            try:
-                future.exception()
-            except asyncio.CancelledError:
-                pass
-        if self._ssl_connect_future is not None:
-            # _ssl_connect_future expects to see the real exception (typically
-            # an ssl.SSLError), not just StreamClosedError.
-            if not self._ssl_connect_future.done():
-                if self.error is not None:
-                    self._ssl_connect_future.set_exception(self.error)
-                else:
-                    self._ssl_connect_future.set_exception(StreamClosedError())
-            self._ssl_connect_future.exception()
-            self._ssl_connect_future = None
-        if self._close_callback is not None:
-            cb = self._close_callback
-            self._close_callback = None
-            self.io_loop.add_callback(cb)
-        # Clear the buffers so they can be cleared immediately even
-        # if the IOStream object is kept alive by a reference cycle.
-        # TODO: Clear the read buffer too; it currently breaks some tests.
-        self._write_buffer = None  # type: ignore
-
-    def reading(self) -> bool:
-        """Returns ``True`` if we are currently reading from the stream."""
-        return self._read_future is not None
-
-    def writing(self) -> bool:
-        """Returns ``True`` if we are currently writing to the stream."""
-        return bool(self._write_buffer)
-
-    def closed(self) -> bool:
-        """Returns ``True`` if the stream has been closed."""
-        return self._closed
-
-    def set_nodelay(self, value: bool) -> None:
-        """Sets the no-delay flag for this stream.
-
-        By default, data written to TCP streams may be held for a time
-        to make the most efficient use of bandwidth (according to
-        Nagle's algorithm).  The no-delay flag requests that data be
-        written as soon as possible, even if doing so would consume
-        additional bandwidth.
-
-        This flag is currently defined only for TCP-based ``IOStreams``.
-
-        .. versionadded:: 3.1
-        """
-        pass
-
-    def _handle_connect(self) -> None:
-        raise NotImplementedError()
-
-    def _handle_events(self, fd: Union[int, ioloop._Selectable], events: int) -> None:
-        if self.closed():
-            gen_log.warning("Got events for closed stream %s", fd)
-            return
-        try:
-            if self._connecting:
-                # Most IOLoops will report a write failed connect
-                # with the WRITE event, but SelectIOLoop reports a
-                # READ as well so we must check for connecting before
-                # either.
-                self._handle_connect()
-            if self.closed():
-                return
-            if events & self.io_loop.READ:
-                self._handle_read()
-            if self.closed():
-                return
-            if events & self.io_loop.WRITE:
-                self._handle_write()
-            if self.closed():
-                return
-            if events & self.io_loop.ERROR:
-                self.error = self.get_fd_error()
-                # We may have queued up a user callback in _handle_read or
-                # _handle_write, so don't close the IOStream until those
-                # callbacks have had a chance to run.
-                self.io_loop.add_callback(self.close)
-                return
-            state = self.io_loop.ERROR
-            if self.reading():
-                state |= self.io_loop.READ
-            if self.writing():
-                state |= self.io_loop.WRITE
-            if state == self.io_loop.ERROR and self._read_buffer_size == 0:
-                # If the connection is idle, listen for reads too so
-                # we can tell if the connection is closed.  If there is
-                # data in the read buffer we won't run the close callback
-                # yet anyway, so we don't need to listen in this case.
-                state |= self.io_loop.READ
-            if state != self._state:
-                assert (
-                    self._state is not None
-                ), "shouldn't happen: _handle_events without self._state"
-                self._state = state
-                self.io_loop.update_handler(self.fileno(), self._state)
-        except UnsatisfiableReadError as e:
-            gen_log.info("Unsatisfiable read, closing connection: %s" % e)
-            self.close(exc_info=e)
-        except Exception as e:
-            gen_log.error("Uncaught exception, closing connection.", exc_info=True)
-            self.close(exc_info=e)
-            raise
-
-    def _read_to_buffer_loop(self) -> Optional[int]:
-        # This method is called from _handle_read and _try_inline_read.
-        if self._read_bytes is not None:
-            target_bytes = self._read_bytes  # type: Optional[int]
-        elif self._read_max_bytes is not None:
-            target_bytes = self._read_max_bytes
-        elif self.reading():
-            # For read_until without max_bytes, or
-            # read_until_close, read as much as we can before
-            # scanning for the delimiter.
-            target_bytes = None
-        else:
-            target_bytes = 0
-        next_find_pos = 0
-        while not self.closed():
-            # Read from the socket until we get EWOULDBLOCK or equivalent.
-            # SSL sockets do some internal buffering, and if the data is
-            # sitting in the SSL object's buffer select() and friends
-            # can't see it; the only way to find out if it's there is to
-            # try to read it.
-            if self._read_to_buffer() == 0:
-                break
-
-            # If we've read all the bytes we can use, break out of
-            # this loop.
-
-            # If we've reached target_bytes, we know we're done.
-            if target_bytes is not None and self._read_buffer_size >= target_bytes:
-                break
-
-            # Otherwise, we need to call the more expensive find_read_pos.
-            # It's inefficient to do this on every read, so instead
-            # do it on the first read and whenever the read buffer
-            # size has doubled.
-            if self._read_buffer_size >= next_find_pos:
-                pos = self._find_read_pos()
-                if pos is not None:
-                    return pos
-                next_find_pos = self._read_buffer_size * 2
-        return self._find_read_pos()
-
-    def _handle_read(self) -> None:
-        try:
-            pos = self._read_to_buffer_loop()
-        except UnsatisfiableReadError:
-            raise
-        except asyncio.CancelledError:
-            raise
-        except Exception as e:
-            gen_log.warning("error on read: %s" % e)
-            self.close(exc_info=e)
-            return
-        if pos is not None:
-            self._read_from_buffer(pos)
-
-    def _start_read(self) -> Future:
-        self._check_closed()  # Before reading, check that stream is not closed.
-        assert self._read_future is None, "Already reading"
-        self._read_future = Future()
-        return self._read_future
-
-    def _finish_read(self, size: int, streaming: bool) -> None:
-        if self._user_read_buffer:
-            self._read_buffer = self._after_user_read_buffer or bytearray()
-            self._after_user_read_buffer = None
-            self._read_buffer_pos = 0
-            self._read_buffer_size = len(self._read_buffer)
-            self._user_read_buffer = False
-            result = size  # type: Union[int, bytes]
-        else:
-            result = self._consume(size)
-        if self._read_future is not None:
-            future = self._read_future
-            self._read_future = None
-            future_set_result_unless_cancelled(future, result)
-        self._maybe_add_error_listener()
-
-    def _try_inline_read(self) -> None:
-        """Attempt to complete the current read operation from buffered data.
-
-        If the read can be completed without blocking, schedules the
-        read callback on the next IOLoop iteration; otherwise starts
-        listening for reads on the socket.
-        """
-        # See if we've already got the data from a previous read
-        pos = self._find_read_pos()
-        if pos is not None:
-            self._read_from_buffer(pos)
-            return
-        self._check_closed()
-        pos = self._read_to_buffer_loop()
-        if pos is not None:
-            self._read_from_buffer(pos)
-            return
-        # We couldn't satisfy the read inline, so make sure we're
-        # listening for new data unless the stream is closed.
-        if not self.closed():
-            self._add_io_state(ioloop.IOLoop.READ)
-
-    def _read_to_buffer(self) -> Optional[int]:
-        """Reads from the socket and appends the result to the read buffer.
-
-        Returns the number of bytes read.  Returns 0 if there is nothing
-        to read (i.e. the read returns EWOULDBLOCK or equivalent).  On
-        error closes the socket and raises an exception.
-        """
-        try:
-            while True:
-                try:
-                    if self._user_read_buffer:
-                        buf = memoryview(self._read_buffer)[
-                            self._read_buffer_size :
-                        ]  # type: Union[memoryview, bytearray]
-                    else:
-                        buf = bytearray(self.read_chunk_size)
-                    bytes_read = self.read_from_fd(buf)
-                except (socket.error, IOError, OSError) as e:
-                    if errno_from_exception(e) == errno.EINTR:
-                        continue
-                    # ssl.SSLError is a subclass of socket.error
-                    if self._is_connreset(e):
-                        # Treat ECONNRESET as a connection close rather than
-                        # an error to minimize log spam  (the exception will
-                        # be available on self.error for apps that care).
-                        self.close(exc_info=e)
-                        return None
-                    self.close(exc_info=e)
-                    raise
-                break
-            if bytes_read is None:
-                return 0
-            elif bytes_read == 0:
-                self.close()
-                return 0
-            if not self._user_read_buffer:
-                self._read_buffer += memoryview(buf)[:bytes_read]
-            self._read_buffer_size += bytes_read
-        finally:
-            # Break the reference to buf so we don't waste a chunk's worth of
-            # memory in case an exception hangs on to our stack frame.
-            del buf
-        if self._read_buffer_size > self.max_buffer_size:
-            gen_log.error("Reached maximum read buffer size")
-            self.close()
-            raise StreamBufferFullError("Reached maximum read buffer size")
-        return bytes_read
-
-    def _read_from_buffer(self, pos: int) -> None:
-        """Attempts to complete the currently-pending read from the buffer.
-
-        The argument is either a position in the read buffer or None,
-        as returned by _find_read_pos.
-        """
-        self._read_bytes = self._read_delimiter = self._read_regex = None
-        self._read_partial = False
-        self._finish_read(pos, False)
-
-    def _find_read_pos(self) -> Optional[int]:
-        """Attempts to find a position in the read buffer that satisfies
-        the currently-pending read.
-
-        Returns a position in the buffer if the current read can be satisfied,
-        or None if it cannot.
-        """
-        if self._read_bytes is not None and (
-            self._read_buffer_size >= self._read_bytes
-            or (self._read_partial and self._read_buffer_size > 0)
-        ):
-            num_bytes = min(self._read_bytes, self._read_buffer_size)
-            return num_bytes
-        elif self._read_delimiter is not None:
-            # Multi-byte delimiters (e.g. '\r\n') may straddle two
-            # chunks in the read buffer, so we can't easily find them
-            # without collapsing the buffer.  However, since protocols
-            # using delimited reads (as opposed to reads of a known
-            # length) tend to be "line" oriented, the delimiter is likely
-            # to be in the first few chunks.  Merge the buffer gradually
-            # since large merges are relatively expensive and get undone in
-            # _consume().
-            if self._read_buffer:
-                loc = self._read_buffer.find(
-                    self._read_delimiter, self._read_buffer_pos
-                )
-                if loc != -1:
-                    loc -= self._read_buffer_pos
-                    delimiter_len = len(self._read_delimiter)
-                    self._check_max_bytes(self._read_delimiter, loc + delimiter_len)
-                    return loc + delimiter_len
-                self._check_max_bytes(self._read_delimiter, self._read_buffer_size)
-        elif self._read_regex is not None:
-            if self._read_buffer:
-                m = self._read_regex.search(self._read_buffer, self._read_buffer_pos)
-                if m is not None:
-                    loc = m.end() - self._read_buffer_pos
-                    self._check_max_bytes(self._read_regex, loc)
-                    return loc
-                self._check_max_bytes(self._read_regex, self._read_buffer_size)
-        return None
-
-    def _check_max_bytes(self, delimiter: Union[bytes, Pattern], size: int) -> None:
-        if self._read_max_bytes is not None and size > self._read_max_bytes:
-            raise UnsatisfiableReadError(
-                "delimiter %r not found within %d bytes"
-                % (delimiter, self._read_max_bytes)
-            )
-
-    def _handle_write(self) -> None:
-        while True:
-            size = len(self._write_buffer)
-            if not size:
-                break
-            assert size > 0
-            try:
-                if _WINDOWS:
-                    # On windows, socket.send blows up if given a
-                    # write buffer that's too large, instead of just
-                    # returning the number of bytes it was able to
-                    # process.  Therefore we must not call socket.send
-                    # with more than 128KB at a time.
-                    size = 128 * 1024
-
-                num_bytes = self.write_to_fd(self._write_buffer.peek(size))
-                if num_bytes == 0:
-                    break
-                self._write_buffer.advance(num_bytes)
-                self._total_write_done_index += num_bytes
-            except (socket.error, IOError, OSError) as e:
-                if e.args[0] in _ERRNO_WOULDBLOCK:
-                    break
-                else:
-                    if not self._is_connreset(e):
-                        # Broken pipe errors are usually caused by connection
-                        # reset, and its better to not log EPIPE errors to
-                        # minimize log spam
-                        gen_log.warning("Write error on %s: %s", self.fileno(), e)
-                    self.close(exc_info=e)
-                    return
-
-        while self._write_futures:
-            index, future = self._write_futures[0]
-            if index > self._total_write_done_index:
-                break
-            self._write_futures.popleft()
-            future_set_result_unless_cancelled(future, None)
-
-    def _consume(self, loc: int) -> bytes:
-        # Consume loc bytes from the read buffer and return them
-        if loc == 0:
-            return b""
-        assert loc <= self._read_buffer_size
-        # Slice the bytearray buffer into bytes, without intermediate copying
-        b = (
-            memoryview(self._read_buffer)[
-                self._read_buffer_pos : self._read_buffer_pos + loc
-            ]
-        ).tobytes()
-        self._read_buffer_pos += loc
-        self._read_buffer_size -= loc
-        # Amortized O(1) shrink
-        # (this heuristic is implemented natively in Python 3.4+
-        #  but is replicated here for Python 2)
-        if self._read_buffer_pos > self._read_buffer_size:
-            del self._read_buffer[: self._read_buffer_pos]
-            self._read_buffer_pos = 0
-        return b
-
-    def _check_closed(self) -> None:
-        if self.closed():
-            raise StreamClosedError(real_error=self.error)
-
-    def _maybe_add_error_listener(self) -> None:
-        # This method is part of an optimization: to detect a connection that
-        # is closed when we're not actively reading or writing, we must listen
-        # for read events.  However, it is inefficient to do this when the
-        # connection is first established because we are going to read or write
-        # immediately anyway.  Instead, we insert checks at various times to
-        # see if the connection is idle and add the read listener then.
-        if self._state is None or self._state == ioloop.IOLoop.ERROR:
-            if (
-                not self.closed()
-                and self._read_buffer_size == 0
-                and self._close_callback is not None
-            ):
-                self._add_io_state(ioloop.IOLoop.READ)
-
-    def _add_io_state(self, state: int) -> None:
-        """Adds `state` (IOLoop.{READ,WRITE} flags) to our event handler.
-
-        Implementation notes: Reads and writes have a fast path and a
-        slow path.  The fast path reads synchronously from socket
-        buffers, while the slow path uses `_add_io_state` to schedule
-        an IOLoop callback.
-
-        To detect closed connections, we must have called
-        `_add_io_state` at some point, but we want to delay this as
-        much as possible so we don't have to set an `IOLoop.ERROR`
-        listener that will be overwritten by the next slow-path
-        operation. If a sequence of fast-path ops do not end in a
-        slow-path op, (e.g. for an @asynchronous long-poll request),
-        we must add the error handler.
-
-        TODO: reevaluate this now that callbacks are gone.
-
-        """
-        if self.closed():
-            # connection has been closed, so there can be no future events
-            return
-        if self._state is None:
-            self._state = ioloop.IOLoop.ERROR | state
-            self.io_loop.add_handler(self.fileno(), self._handle_events, self._state)
-        elif not self._state & state:
-            self._state = self._state | state
-            self.io_loop.update_handler(self.fileno(), self._state)
-
-    def _is_connreset(self, exc: BaseException) -> bool:
-        """Return ``True`` if exc is ECONNRESET or equivalent.
-
-        May be overridden in subclasses.
-        """
-        return (
-            isinstance(exc, (socket.error, IOError))
-            and errno_from_exception(exc) in _ERRNO_CONNRESET
-        )
-
-
-class IOStream(BaseIOStream):
-    r"""Socket-based `IOStream` implementation.
-
-    This class supports the read and write methods from `BaseIOStream`
-    plus a `connect` method.
-
-    The ``socket`` parameter may either be connected or unconnected.
-    For server operations the socket is the result of calling
-    `socket.accept <socket.socket.accept>`.  For client operations the
-    socket is created with `socket.socket`, and may either be
-    connected before passing it to the `IOStream` or connected with
-    `IOStream.connect`.
-
-    A very simple (and broken) HTTP client using this class:
-
-    .. testcode::
-
-        import tornado.ioloop
-        import tornado.iostream
-        import socket
-
-        async def main():
-            s = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0)
-            stream = tornado.iostream.IOStream(s)
-            await stream.connect(("friendfeed.com", 80))
-            await stream.write(b"GET / HTTP/1.0\r\nHost: friendfeed.com\r\n\r\n")
-            header_data = await stream.read_until(b"\r\n\r\n")
-            headers = {}
-            for line in header_data.split(b"\r\n"):
-                parts = line.split(b":")
-                if len(parts) == 2:
-                    headers[parts[0].strip()] = parts[1].strip()
-            body_data = await stream.read_bytes(int(headers[b"Content-Length"]))
-            print(body_data)
-            stream.close()
-
-        if __name__ == '__main__':
-            tornado.ioloop.IOLoop.current().run_sync(main)
-            s = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0)
-            stream = tornado.iostream.IOStream(s)
-            stream.connect(("friendfeed.com", 80), send_request)
-            tornado.ioloop.IOLoop.current().start()
-
-    .. testoutput::
-       :hide:
-
-    """
-
-    def __init__(self, socket: socket.socket, *args: Any, **kwargs: Any) -> None:
-        self.socket = socket
-        self.socket.setblocking(False)
-        super(IOStream, self).__init__(*args, **kwargs)
-
-    def fileno(self) -> Union[int, ioloop._Selectable]:
-        return self.socket
-
-    def close_fd(self) -> None:
-        self.socket.close()
-        self.socket = None  # type: ignore
-
-    def get_fd_error(self) -> Optional[Exception]:
-        errno = self.socket.getsockopt(socket.SOL_SOCKET, socket.SO_ERROR)
-        return socket.error(errno, os.strerror(errno))
-
-    def read_from_fd(self, buf: Union[bytearray, memoryview]) -> Optional[int]:
-        try:
-            return self.socket.recv_into(buf, len(buf))
-        except socket.error as e:
-            if e.args[0] in _ERRNO_WOULDBLOCK:
-                return None
-            else:
-                raise
-        finally:
-            del buf
-
-    def write_to_fd(self, data: memoryview) -> int:
-        try:
-            return self.socket.send(data)  # type: ignore
-        finally:
-            # Avoid keeping to data, which can be a memoryview.
-            # See https://github.com/tornadoweb/tornado/pull/2008
-            del data
-
-    def connect(
-        self: _IOStreamType, address: tuple, server_hostname: str = None
-    ) -> "Future[_IOStreamType]":
-        """Connects the socket to a remote address without blocking.
-
-        May only be called if the socket passed to the constructor was
-        not previously connected.  The address parameter is in the
-        same format as for `socket.connect <socket.socket.connect>` for
-        the type of socket passed to the IOStream constructor,
-        e.g. an ``(ip, port)`` tuple.  Hostnames are accepted here,
-        but will be resolved synchronously and block the IOLoop.
-        If you have a hostname instead of an IP address, the `.TCPClient`
-        class is recommended instead of calling this method directly.
-        `.TCPClient` will do asynchronous DNS resolution and handle
-        both IPv4 and IPv6.
-
-        If ``callback`` is specified, it will be called with no
-        arguments when the connection is completed; if not this method
-        returns a `.Future` (whose result after a successful
-        connection will be the stream itself).
-
-        In SSL mode, the ``server_hostname`` parameter will be used
-        for certificate validation (unless disabled in the
-        ``ssl_options``) and SNI (if supported; requires Python
-        2.7.9+).
-
-        Note that it is safe to call `IOStream.write
-        <BaseIOStream.write>` while the connection is pending, in
-        which case the data will be written as soon as the connection
-        is ready.  Calling `IOStream` read methods before the socket is
-        connected works on some platforms but is non-portable.
-
-        .. versionchanged:: 4.0
-            If no callback is given, returns a `.Future`.
-
-        .. versionchanged:: 4.2
-           SSL certificates are validated by default; pass
-           ``ssl_options=dict(cert_reqs=ssl.CERT_NONE)`` or a
-           suitably-configured `ssl.SSLContext` to the
-           `SSLIOStream` constructor to disable.
-
-        .. versionchanged:: 6.0
-
-           The ``callback`` argument was removed. Use the returned
-           `.Future` instead.
-
-        """
-        self._connecting = True
-        future = Future()  # type: Future[_IOStreamType]
-        self._connect_future = typing.cast("Future[IOStream]", future)
-        try:
-            self.socket.connect(address)
-        except socket.error as e:
-            # In non-blocking mode we expect connect() to raise an
-            # exception with EINPROGRESS or EWOULDBLOCK.
-            #
-            # On freebsd, other errors such as ECONNREFUSED may be
-            # returned immediately when attempting to connect to
-            # localhost, so handle them the same way as an error
-            # reported later in _handle_connect.
-            if (
-                errno_from_exception(e) not in _ERRNO_INPROGRESS
-                and errno_from_exception(e) not in _ERRNO_WOULDBLOCK
-            ):
-                if future is None:
-                    gen_log.warning(
-                        "Connect error on fd %s: %s", self.socket.fileno(), e
-                    )
-                self.close(exc_info=e)
-                return future
-        self._add_io_state(self.io_loop.WRITE)
-        return future
-
-    def start_tls(
-        self,
-        server_side: bool,
-        ssl_options: Union[Dict[str, Any], ssl.SSLContext] = None,
-        server_hostname: str = None,
-    ) -> Awaitable["SSLIOStream"]:
-        """Convert this `IOStream` to an `SSLIOStream`.
-
-        This enables protocols that begin in clear-text mode and
-        switch to SSL after some initial negotiation (such as the
-        ``STARTTLS`` extension to SMTP and IMAP).
-
-        This method cannot be used if there are outstanding reads
-        or writes on the stream, or if there is any data in the
-        IOStream's buffer (data in the operating system's socket
-        buffer is allowed).  This means it must generally be used
-        immediately after reading or writing the last clear-text
-        data.  It can also be used immediately after connecting,
-        before any reads or writes.
-
-        The ``ssl_options`` argument may be either an `ssl.SSLContext`
-        object or a dictionary of keyword arguments for the
-        `ssl.wrap_socket` function.  The ``server_hostname`` argument
-        will be used for certificate validation unless disabled
-        in the ``ssl_options``.
-
-        This method returns a `.Future` whose result is the new
-        `SSLIOStream`.  After this method has been called,
-        any other operation on the original stream is undefined.
-
-        If a close callback is defined on this stream, it will be
-        transferred to the new stream.
-
-        .. versionadded:: 4.0
-
-        .. versionchanged:: 4.2
-           SSL certificates are validated by default; pass
-           ``ssl_options=dict(cert_reqs=ssl.CERT_NONE)`` or a
-           suitably-configured `ssl.SSLContext` to disable.
-        """
-        if (
-            self._read_future
-            or self._write_futures
-            or self._connect_future
-            or self._closed
-            or self._read_buffer
-            or self._write_buffer
-        ):
-            raise ValueError("IOStream is not idle; cannot convert to SSL")
-        if ssl_options is None:
-            if server_side:
-                ssl_options = _server_ssl_defaults
-            else:
-                ssl_options = _client_ssl_defaults
-
-        socket = self.socket
-        self.io_loop.remove_handler(socket)
-        self.socket = None  # type: ignore
-        socket = ssl_wrap_socket(
-            socket,
-            ssl_options,
-            server_hostname=server_hostname,
-            server_side=server_side,
-            do_handshake_on_connect=False,
-        )
-        orig_close_callback = self._close_callback
-        self._close_callback = None
-
-        future = Future()  # type: Future[SSLIOStream]
-        ssl_stream = SSLIOStream(socket, ssl_options=ssl_options)
-        ssl_stream.set_close_callback(orig_close_callback)
-        ssl_stream._ssl_connect_future = future
-        ssl_stream.max_buffer_size = self.max_buffer_size
-        ssl_stream.read_chunk_size = self.read_chunk_size
-        return future
-
-    def _handle_connect(self) -> None:
-        try:
-            err = self.socket.getsockopt(socket.SOL_SOCKET, socket.SO_ERROR)
-        except socket.error as e:
-            # Hurd doesn't allow SO_ERROR for loopback sockets because all
-            # errors for such sockets are reported synchronously.
-            if errno_from_exception(e) == errno.ENOPROTOOPT:
-                err = 0
-        if err != 0:
-            self.error = socket.error(err, os.strerror(err))
-            # IOLoop implementations may vary: some of them return
-            # an error state before the socket becomes writable, so
-            # in that case a connection failure would be handled by the
-            # error path in _handle_events instead of here.
-            if self._connect_future is None:
-                gen_log.warning(
-                    "Connect error on fd %s: %s",
-                    self.socket.fileno(),
-                    errno.errorcode[err],
-                )
-            self.close()
-            return
-        if self._connect_future is not None:
-            future = self._connect_future
-            self._connect_future = None
-            future_set_result_unless_cancelled(future, self)
-        self._connecting = False
-
-    def set_nodelay(self, value: bool) -> None:
-        if self.socket is not None and self.socket.family in (
-            socket.AF_INET,
-            socket.AF_INET6,
-        ):
-            try:
-                self.socket.setsockopt(
-                    socket.IPPROTO_TCP, socket.TCP_NODELAY, 1 if value else 0
-                )
-            except socket.error as e:
-                # Sometimes setsockopt will fail if the socket is closed
-                # at the wrong time.  This can happen with HTTPServer
-                # resetting the value to ``False`` between requests.
-                if e.errno != errno.EINVAL and not self._is_connreset(e):
-                    raise
-
-
-class SSLIOStream(IOStream):
-    """A utility class to write to and read from a non-blocking SSL socket.
-
-    If the socket passed to the constructor is already connected,
-    it should be wrapped with::
-
-        ssl.wrap_socket(sock, do_handshake_on_connect=False, **kwargs)
-
-    before constructing the `SSLIOStream`.  Unconnected sockets will be
-    wrapped when `IOStream.connect` is finished.
-    """
-
-    socket = None  # type: ssl.SSLSocket
-
-    def __init__(self, *args: Any, **kwargs: Any) -> None:
-        """The ``ssl_options`` keyword argument may either be an
-        `ssl.SSLContext` object or a dictionary of keywords arguments
-        for `ssl.wrap_socket`
-        """
-        self._ssl_options = kwargs.pop("ssl_options", _client_ssl_defaults)
-        super(SSLIOStream, self).__init__(*args, **kwargs)
-        self._ssl_accepting = True
-        self._handshake_reading = False
-        self._handshake_writing = False
-        self._server_hostname = None  # type: Optional[str]
-
-        # If the socket is already connected, attempt to start the handshake.
-        try:
-            self.socket.getpeername()
-        except socket.error:
-            pass
-        else:
-            # Indirectly start the handshake, which will run on the next
-            # IOLoop iteration and then the real IO state will be set in
-            # _handle_events.
-            self._add_io_state(self.io_loop.WRITE)
-
-    def reading(self) -> bool:
-        return self._handshake_reading or super(SSLIOStream, self).reading()
-
-    def writing(self) -> bool:
-        return self._handshake_writing or super(SSLIOStream, self).writing()
-
-    def _do_ssl_handshake(self) -> None:
-        # Based on code from test_ssl.py in the python stdlib
-        try:
-            self._handshake_reading = False
-            self._handshake_writing = False
-            self.socket.do_handshake()
-        except ssl.SSLError as err:
-            if err.args[0] == ssl.SSL_ERROR_WANT_READ:
-                self._handshake_reading = True
-                return
-            elif err.args[0] == ssl.SSL_ERROR_WANT_WRITE:
-                self._handshake_writing = True
-                return
-            elif err.args[0] in (ssl.SSL_ERROR_EOF, ssl.SSL_ERROR_ZERO_RETURN):
-                return self.close(exc_info=err)
-            elif err.args[0] == ssl.SSL_ERROR_SSL:
-                try:
-                    peer = self.socket.getpeername()
-                except Exception:
-                    peer = "(not connected)"
-                gen_log.warning(
-                    "SSL Error on %s %s: %s", self.socket.fileno(), peer, err
-                )
-                return self.close(exc_info=err)
-            raise
-        except socket.error as err:
-            # Some port scans (e.g. nmap in -sT mode) have been known
-            # to cause do_handshake to raise EBADF and ENOTCONN, so make
-            # those errors quiet as well.
-            # https://groups.google.com/forum/?fromgroups#!topic/python-tornado/ApucKJat1_0
-            # Errno 0 is also possible in some cases (nc -z).
-            # https://github.com/tornadoweb/tornado/issues/2504
-            if self._is_connreset(err) or err.args[0] in (
-                0,
-                errno.EBADF,
-                errno.ENOTCONN,
-            ):
-                return self.close(exc_info=err)
-            raise
-        except AttributeError as err:
-            # On Linux, if the connection was reset before the call to
-            # wrap_socket, do_handshake will fail with an
-            # AttributeError.
-            return self.close(exc_info=err)
-        else:
-            self._ssl_accepting = False
-            if not self._verify_cert(self.socket.getpeercert()):
-                self.close()
-                return
-            self._finish_ssl_connect()
-
-    def _finish_ssl_connect(self) -> None:
-        if self._ssl_connect_future is not None:
-            future = self._ssl_connect_future
-            self._ssl_connect_future = None
-            future_set_result_unless_cancelled(future, self)
-
-    def _verify_cert(self, peercert: Any) -> bool:
-        """Returns ``True`` if peercert is valid according to the configured
-        validation mode and hostname.
-
-        The ssl handshake already tested the certificate for a valid
-        CA signature; the only thing that remains is to check
-        the hostname.
-        """
-        if isinstance(self._ssl_options, dict):
-            verify_mode = self._ssl_options.get("cert_reqs", ssl.CERT_NONE)
-        elif isinstance(self._ssl_options, ssl.SSLContext):
-            verify_mode = self._ssl_options.verify_mode
-        assert verify_mode in (ssl.CERT_NONE, ssl.CERT_REQUIRED, ssl.CERT_OPTIONAL)
-        if verify_mode == ssl.CERT_NONE or self._server_hostname is None:
-            return True
-        cert = self.socket.getpeercert()
-        if cert is None and verify_mode == ssl.CERT_REQUIRED:
-            gen_log.warning("No SSL certificate given")
-            return False
-        try:
-            ssl.match_hostname(peercert, self._server_hostname)
-        except ssl.CertificateError as e:
-            gen_log.warning("Invalid SSL certificate: %s" % e)
-            return False
-        else:
-            return True
-
-    def _handle_read(self) -> None:
-        if self._ssl_accepting:
-            self._do_ssl_handshake()
-            return
-        super(SSLIOStream, self)._handle_read()
-
-    def _handle_write(self) -> None:
-        if self._ssl_accepting:
-            self._do_ssl_handshake()
-            return
-        super(SSLIOStream, self)._handle_write()
-
-    def connect(
-        self, address: Tuple, server_hostname: str = None
-    ) -> "Future[SSLIOStream]":
-        self._server_hostname = server_hostname
-        # Ignore the result of connect(). If it fails,
-        # wait_for_handshake will raise an error too. This is
-        # necessary for the old semantics of the connect callback
-        # (which takes no arguments). In 6.0 this can be refactored to
-        # be a regular coroutine.
-        # TODO: This is trickier than it looks, since if write()
-        # is called with a connect() pending, we want the connect
-        # to resolve before the write. Or do we care about this?
-        # (There's a test for it, but I think in practice users
-        # either wait for the connect before performing a write or
-        # they don't care about the connect Future at all)
-        fut = super(SSLIOStream, self).connect(address)
-        fut.add_done_callback(lambda f: f.exception())
-        return self.wait_for_handshake()
-
-    def _handle_connect(self) -> None:
-        # Call the superclass method to check for errors.
-        super(SSLIOStream, self)._handle_connect()
-        if self.closed():
-            return
-        # When the connection is complete, wrap the socket for SSL
-        # traffic.  Note that we do this by overriding _handle_connect
-        # instead of by passing a callback to super().connect because
-        # user callbacks are enqueued asynchronously on the IOLoop,
-        # but since _handle_events calls _handle_connect immediately
-        # followed by _handle_write we need this to be synchronous.
-        #
-        # The IOLoop will get confused if we swap out self.socket while the
-        # fd is registered, so remove it now and re-register after
-        # wrap_socket().
-        self.io_loop.remove_handler(self.socket)
-        old_state = self._state
-        assert old_state is not None
-        self._state = None
-        self.socket = ssl_wrap_socket(
-            self.socket,
-            self._ssl_options,
-            server_hostname=self._server_hostname,
-            do_handshake_on_connect=False,
-        )
-        self._add_io_state(old_state)
-
-    def wait_for_handshake(self) -> "Future[SSLIOStream]":
-        """Wait for the initial SSL handshake to complete.
-
-        If a ``callback`` is given, it will be called with no
-        arguments once the handshake is complete; otherwise this
-        method returns a `.Future` which will resolve to the
-        stream itself after the handshake is complete.
-
-        Once the handshake is complete, information such as
-        the peer's certificate and NPN/ALPN selections may be
-        accessed on ``self.socket``.
-
-        This method is intended for use on server-side streams
-        or after using `IOStream.start_tls`; it should not be used
-        with `IOStream.connect` (which already waits for the
-        handshake to complete). It may only be called once per stream.
-
-        .. versionadded:: 4.2
-
-        .. versionchanged:: 6.0
-
-           The ``callback`` argument was removed. Use the returned
-           `.Future` instead.
-
-        """
-        if self._ssl_connect_future is not None:
-            raise RuntimeError("Already waiting")
-        future = self._ssl_connect_future = Future()
-        if not self._ssl_accepting:
-            self._finish_ssl_connect()
-        return future
-
-    def write_to_fd(self, data: memoryview) -> int:
-        try:
-            return self.socket.send(data)  # type: ignore
-        except ssl.SSLError as e:
-            if e.args[0] == ssl.SSL_ERROR_WANT_WRITE:
-                # In Python 3.5+, SSLSocket.send raises a WANT_WRITE error if
-                # the socket is not writeable; we need to transform this into
-                # an EWOULDBLOCK socket.error or a zero return value,
-                # either of which will be recognized by the caller of this
-                # method. Prior to Python 3.5, an unwriteable socket would
-                # simply return 0 bytes written.
-                return 0
-            raise
-        finally:
-            # Avoid keeping to data, which can be a memoryview.
-            # See https://github.com/tornadoweb/tornado/pull/2008
-            del data
-
-    def read_from_fd(self, buf: Union[bytearray, memoryview]) -> Optional[int]:
-        try:
-            if self._ssl_accepting:
-                # If the handshake hasn't finished yet, there can't be anything
-                # to read (attempting to read may or may not raise an exception
-                # depending on the SSL version)
-                return None
-            try:
-                return self.socket.recv_into(buf, len(buf))
-            except ssl.SSLError as e:
-                # SSLError is a subclass of socket.error, so this except
-                # block must come first.
-                if e.args[0] == ssl.SSL_ERROR_WANT_READ:
-                    return None
-                else:
-                    raise
-            except socket.error as e:
-                if e.args[0] in _ERRNO_WOULDBLOCK:
-                    return None
-                else:
-                    raise
-        finally:
-            del buf
-
-    def _is_connreset(self, e: BaseException) -> bool:
-        if isinstance(e, ssl.SSLError) and e.args[0] == ssl.SSL_ERROR_EOF:
-            return True
-        return super(SSLIOStream, self)._is_connreset(e)
-
-
-class PipeIOStream(BaseIOStream):
-    """Pipe-based `IOStream` implementation.
-
-    The constructor takes an integer file descriptor (such as one returned
-    by `os.pipe`) rather than an open file object.  Pipes are generally
-    one-way, so a `PipeIOStream` can be used for reading or writing but not
-    both.
-    """
-
-    def __init__(self, fd: int, *args: Any, **kwargs: Any) -> None:
-        self.fd = fd
-        self._fio = io.FileIO(self.fd, "r+")
-        _set_nonblocking(fd)
-        super(PipeIOStream, self).__init__(*args, **kwargs)
-
-    def fileno(self) -> int:
-        return self.fd
-
-    def close_fd(self) -> None:
-        self._fio.close()
-
-    def write_to_fd(self, data: memoryview) -> int:
-        try:
-            return os.write(self.fd, data)  # type: ignore
-        finally:
-            # Avoid keeping to data, which can be a memoryview.
-            # See https://github.com/tornadoweb/tornado/pull/2008
-            del data
-
-    def read_from_fd(self, buf: Union[bytearray, memoryview]) -> Optional[int]:
-        try:
-            return self._fio.readinto(buf)  # type: ignore
-        except (IOError, OSError) as e:
-            if errno_from_exception(e) == errno.EBADF:
-                # If the writing half of a pipe is closed, select will
-                # report it as readable but reads will fail with EBADF.
-                self.close(exc_info=e)
-                return None
-            else:
-                raise
-        finally:
-            del buf
-
-
-def doctests() -> Any:
-    import doctest
-
-    return doctest.DocTestSuite()
diff --git a/venv/lib/python3.7/site-packages/tornado/locale.py b/venv/lib/python3.7/site-packages/tornado/locale.py
deleted file mode 100644
index b72d81b..0000000
--- a/venv/lib/python3.7/site-packages/tornado/locale.py
+++ /dev/null
@@ -1,564 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-# Copyright 2009 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-"""Translation methods for generating localized strings.
-
-To load a locale and generate a translated string::
-
-    user_locale = tornado.locale.get("es_LA")
-    print(user_locale.translate("Sign out"))
-
-`tornado.locale.get()` returns the closest matching locale, not necessarily the
-specific locale you requested. You can support pluralization with
-additional arguments to `~Locale.translate()`, e.g.::
-
-    people = [...]
-    message = user_locale.translate(
-        "%(list)s is online", "%(list)s are online", len(people))
-    print(message % {"list": user_locale.list(people)})
-
-The first string is chosen if ``len(people) == 1``, otherwise the second
-string is chosen.
-
-Applications should call one of `load_translations` (which uses a simple
-CSV format) or `load_gettext_translations` (which uses the ``.mo`` format
-supported by `gettext` and related tools).  If neither method is called,
-the `Locale.translate` method will simply return the original string.
-"""
-
-import codecs
-import csv
-import datetime
-import gettext
-import os
-import re
-
-from tornado import escape
-from tornado.log import gen_log
-
-from tornado._locale_data import LOCALE_NAMES
-
-from typing import Iterable, Any, Union, Dict
-
-_default_locale = "en_US"
-_translations = {}  # type: Dict[str, Any]
-_supported_locales = frozenset([_default_locale])
-_use_gettext = False
-CONTEXT_SEPARATOR = "\x04"
-
-
-def get(*locale_codes: str) -> "Locale":
-    """Returns the closest match for the given locale codes.
-
-    We iterate over all given locale codes in order. If we have a tight
-    or a loose match for the code (e.g., "en" for "en_US"), we return
-    the locale. Otherwise we move to the next code in the list.
-
-    By default we return ``en_US`` if no translations are found for any of
-    the specified locales. You can change the default locale with
-    `set_default_locale()`.
-    """
-    return Locale.get_closest(*locale_codes)
-
-
-def set_default_locale(code: str) -> None:
-    """Sets the default locale.
-
-    The default locale is assumed to be the language used for all strings
-    in the system. The translations loaded from disk are mappings from
-    the default locale to the destination locale. Consequently, you don't
-    need to create a translation file for the default locale.
-    """
-    global _default_locale
-    global _supported_locales
-    _default_locale = code
-    _supported_locales = frozenset(list(_translations.keys()) + [_default_locale])
-
-
-def load_translations(directory: str, encoding: str = None) -> None:
-    """Loads translations from CSV files in a directory.
-
-    Translations are strings with optional Python-style named placeholders
-    (e.g., ``My name is %(name)s``) and their associated translations.
-
-    The directory should have translation files of the form ``LOCALE.csv``,
-    e.g. ``es_GT.csv``. The CSV files should have two or three columns: string,
-    translation, and an optional plural indicator. Plural indicators should
-    be one of "plural" or "singular". A given string can have both singular
-    and plural forms. For example ``%(name)s liked this`` may have a
-    different verb conjugation depending on whether %(name)s is one
-    name or a list of names. There should be two rows in the CSV file for
-    that string, one with plural indicator "singular", and one "plural".
-    For strings with no verbs that would change on translation, simply
-    use "unknown" or the empty string (or don't include the column at all).
-
-    The file is read using the `csv` module in the default "excel" dialect.
-    In this format there should not be spaces after the commas.
-
-    If no ``encoding`` parameter is given, the encoding will be
-    detected automatically (among UTF-8 and UTF-16) if the file
-    contains a byte-order marker (BOM), defaulting to UTF-8 if no BOM
-    is present.
-
-    Example translation ``es_LA.csv``::
-
-        "I love you","Te amo"
-        "%(name)s liked this","A %(name)s les gustó esto","plural"
-        "%(name)s liked this","A %(name)s le gustó esto","singular"
-
-    .. versionchanged:: 4.3
-       Added ``encoding`` parameter. Added support for BOM-based encoding
-       detection, UTF-16, and UTF-8-with-BOM.
-    """
-    global _translations
-    global _supported_locales
-    _translations = {}
-    for path in os.listdir(directory):
-        if not path.endswith(".csv"):
-            continue
-        locale, extension = path.split(".")
-        if not re.match("[a-z]+(_[A-Z]+)?$", locale):
-            gen_log.error(
-                "Unrecognized locale %r (path: %s)",
-                locale,
-                os.path.join(directory, path),
-            )
-            continue
-        full_path = os.path.join(directory, path)
-        if encoding is None:
-            # Try to autodetect encoding based on the BOM.
-            with open(full_path, "rb") as bf:
-                data = bf.read(len(codecs.BOM_UTF16_LE))
-            if data in (codecs.BOM_UTF16_LE, codecs.BOM_UTF16_BE):
-                encoding = "utf-16"
-            else:
-                # utf-8-sig is "utf-8 with optional BOM". It's discouraged
-                # in most cases but is common with CSV files because Excel
-                # cannot read utf-8 files without a BOM.
-                encoding = "utf-8-sig"
-        # python 3: csv.reader requires a file open in text mode.
-        # Specify an encoding to avoid dependence on $LANG environment variable.
-        with open(full_path, encoding=encoding) as f:
-            _translations[locale] = {}
-            for i, row in enumerate(csv.reader(f)):
-                if not row or len(row) < 2:
-                    continue
-                row = [escape.to_unicode(c).strip() for c in row]
-                english, translation = row[:2]
-                if len(row) > 2:
-                    plural = row[2] or "unknown"
-                else:
-                    plural = "unknown"
-                if plural not in ("plural", "singular", "unknown"):
-                    gen_log.error(
-                        "Unrecognized plural indicator %r in %s line %d",
-                        plural,
-                        path,
-                        i + 1,
-                    )
-                    continue
-                _translations[locale].setdefault(plural, {})[english] = translation
-    _supported_locales = frozenset(list(_translations.keys()) + [_default_locale])
-    gen_log.debug("Supported locales: %s", sorted(_supported_locales))
-
-
-def load_gettext_translations(directory: str, domain: str) -> None:
-    """Loads translations from `gettext`'s locale tree
-
-    Locale tree is similar to system's ``/usr/share/locale``, like::
-
-        {directory}/{lang}/LC_MESSAGES/{domain}.mo
-
-    Three steps are required to have your app translated:
-
-    1. Generate POT translation file::
-
-        xgettext --language=Python --keyword=_:1,2 -d mydomain file1.py file2.html etc
-
-    2. Merge against existing POT file::
-
-        msgmerge old.po mydomain.po > new.po
-
-    3. Compile::
-
-        msgfmt mydomain.po -o {directory}/pt_BR/LC_MESSAGES/mydomain.mo
-    """
-    import gettext
-
-    global _translations
-    global _supported_locales
-    global _use_gettext
-    _translations = {}
-    for lang in os.listdir(directory):
-        if lang.startswith("."):
-            continue  # skip .svn, etc
-        if os.path.isfile(os.path.join(directory, lang)):
-            continue
-        try:
-            os.stat(os.path.join(directory, lang, "LC_MESSAGES", domain + ".mo"))
-            _translations[lang] = gettext.translation(
-                domain, directory, languages=[lang]
-            )
-        except Exception as e:
-            gen_log.error("Cannot load translation for '%s': %s", lang, str(e))
-            continue
-    _supported_locales = frozenset(list(_translations.keys()) + [_default_locale])
-    _use_gettext = True
-    gen_log.debug("Supported locales: %s", sorted(_supported_locales))
-
-
-def get_supported_locales() -> Iterable[str]:
-    """Returns a list of all the supported locale codes."""
-    return _supported_locales
-
-
-class Locale(object):
-    """Object representing a locale.
-
-    After calling one of `load_translations` or `load_gettext_translations`,
-    call `get` or `get_closest` to get a Locale object.
-    """
-
-    _cache = {}  # type: Dict[str, Locale]
-
-    @classmethod
-    def get_closest(cls, *locale_codes: str) -> "Locale":
-        """Returns the closest match for the given locale code."""
-        for code in locale_codes:
-            if not code:
-                continue
-            code = code.replace("-", "_")
-            parts = code.split("_")
-            if len(parts) > 2:
-                continue
-            elif len(parts) == 2:
-                code = parts[0].lower() + "_" + parts[1].upper()
-            if code in _supported_locales:
-                return cls.get(code)
-            if parts[0].lower() in _supported_locales:
-                return cls.get(parts[0].lower())
-        return cls.get(_default_locale)
-
-    @classmethod
-    def get(cls, code: str) -> "Locale":
-        """Returns the Locale for the given locale code.
-
-        If it is not supported, we raise an exception.
-        """
-        if code not in cls._cache:
-            assert code in _supported_locales
-            translations = _translations.get(code, None)
-            if translations is None:
-                locale = CSVLocale(code, {})  # type: Locale
-            elif _use_gettext:
-                locale = GettextLocale(code, translations)
-            else:
-                locale = CSVLocale(code, translations)
-            cls._cache[code] = locale
-        return cls._cache[code]
-
-    def __init__(self, code: str) -> None:
-        self.code = code
-        self.name = LOCALE_NAMES.get(code, {}).get("name", u"Unknown")
-        self.rtl = False
-        for prefix in ["fa", "ar", "he"]:
-            if self.code.startswith(prefix):
-                self.rtl = True
-                break
-
-        # Initialize strings for date formatting
-        _ = self.translate
-        self._months = [
-            _("January"),
-            _("February"),
-            _("March"),
-            _("April"),
-            _("May"),
-            _("June"),
-            _("July"),
-            _("August"),
-            _("September"),
-            _("October"),
-            _("November"),
-            _("December"),
-        ]
-        self._weekdays = [
-            _("Monday"),
-            _("Tuesday"),
-            _("Wednesday"),
-            _("Thursday"),
-            _("Friday"),
-            _("Saturday"),
-            _("Sunday"),
-        ]
-
-    def translate(
-        self, message: str, plural_message: str = None, count: int = None
-    ) -> str:
-        """Returns the translation for the given message for this locale.
-
-        If ``plural_message`` is given, you must also provide
-        ``count``. We return ``plural_message`` when ``count != 1``,
-        and we return the singular form for the given message when
-        ``count == 1``.
-        """
-        raise NotImplementedError()
-
-    def pgettext(
-        self, context: str, message: str, plural_message: str = None, count: int = None
-    ) -> str:
-        raise NotImplementedError()
-
-    def format_date(
-        self,
-        date: Union[int, float, datetime.datetime],
-        gmt_offset: int = 0,
-        relative: bool = True,
-        shorter: bool = False,
-        full_format: bool = False,
-    ) -> str:
-        """Formats the given date (which should be GMT).
-
-        By default, we return a relative time (e.g., "2 minutes ago"). You
-        can return an absolute date string with ``relative=False``.
-
-        You can force a full format date ("July 10, 1980") with
-        ``full_format=True``.
-
-        This method is primarily intended for dates in the past.
-        For dates in the future, we fall back to full format.
-        """
-        if isinstance(date, (int, float)):
-            date = datetime.datetime.utcfromtimestamp(date)
-        now = datetime.datetime.utcnow()
-        if date > now:
-            if relative and (date - now).seconds < 60:
-                # Due to click skew, things are some things slightly
-                # in the future. Round timestamps in the immediate
-                # future down to now in relative mode.
-                date = now
-            else:
-                # Otherwise, future dates always use the full format.
-                full_format = True
-        local_date = date - datetime.timedelta(minutes=gmt_offset)
-        local_now = now - datetime.timedelta(minutes=gmt_offset)
-        local_yesterday = local_now - datetime.timedelta(hours=24)
-        difference = now - date
-        seconds = difference.seconds
-        days = difference.days
-
-        _ = self.translate
-        format = None
-        if not full_format:
-            if relative and days == 0:
-                if seconds < 50:
-                    return _("1 second ago", "%(seconds)d seconds ago", seconds) % {
-                        "seconds": seconds
-                    }
-
-                if seconds < 50 * 60:
-                    minutes = round(seconds / 60.0)
-                    return _("1 minute ago", "%(minutes)d minutes ago", minutes) % {
-                        "minutes": minutes
-                    }
-
-                hours = round(seconds / (60.0 * 60))
-                return _("1 hour ago", "%(hours)d hours ago", hours) % {"hours": hours}
-
-            if days == 0:
-                format = _("%(time)s")
-            elif days == 1 and local_date.day == local_yesterday.day and relative:
-                format = _("yesterday") if shorter else _("yesterday at %(time)s")
-            elif days < 5:
-                format = _("%(weekday)s") if shorter else _("%(weekday)s at %(time)s")
-            elif days < 334:  # 11mo, since confusing for same month last year
-                format = (
-                    _("%(month_name)s %(day)s")
-                    if shorter
-                    else _("%(month_name)s %(day)s at %(time)s")
-                )
-
-        if format is None:
-            format = (
-                _("%(month_name)s %(day)s, %(year)s")
-                if shorter
-                else _("%(month_name)s %(day)s, %(year)s at %(time)s")
-            )
-
-        tfhour_clock = self.code not in ("en", "en_US", "zh_CN")
-        if tfhour_clock:
-            str_time = "%d:%02d" % (local_date.hour, local_date.minute)
-        elif self.code == "zh_CN":
-            str_time = "%s%d:%02d" % (
-                (u"\u4e0a\u5348", u"\u4e0b\u5348")[local_date.hour >= 12],
-                local_date.hour % 12 or 12,
-                local_date.minute,
-            )
-        else:
-            str_time = "%d:%02d %s" % (
-                local_date.hour % 12 or 12,
-                local_date.minute,
-                ("am", "pm")[local_date.hour >= 12],
-            )
-
-        return format % {
-            "month_name": self._months[local_date.month - 1],
-            "weekday": self._weekdays[local_date.weekday()],
-            "day": str(local_date.day),
-            "year": str(local_date.year),
-            "time": str_time,
-        }
-
-    def format_day(
-        self, date: datetime.datetime, gmt_offset: int = 0, dow: bool = True
-    ) -> bool:
-        """Formats the given date as a day of week.
-
-        Example: "Monday, January 22". You can remove the day of week with
-        ``dow=False``.
-        """
-        local_date = date - datetime.timedelta(minutes=gmt_offset)
-        _ = self.translate
-        if dow:
-            return _("%(weekday)s, %(month_name)s %(day)s") % {
-                "month_name": self._months[local_date.month - 1],
-                "weekday": self._weekdays[local_date.weekday()],
-                "day": str(local_date.day),
-            }
-        else:
-            return _("%(month_name)s %(day)s") % {
-                "month_name": self._months[local_date.month - 1],
-                "day": str(local_date.day),
-            }
-
-    def list(self, parts: Any) -> str:
-        """Returns a comma-separated list for the given list of parts.
-
-        The format is, e.g., "A, B and C", "A and B" or just "A" for lists
-        of size 1.
-        """
-        _ = self.translate
-        if len(parts) == 0:
-            return ""
-        if len(parts) == 1:
-            return parts[0]
-        comma = u" \u0648 " if self.code.startswith("fa") else u", "
-        return _("%(commas)s and %(last)s") % {
-            "commas": comma.join(parts[:-1]),
-            "last": parts[len(parts) - 1],
-        }
-
-    def friendly_number(self, value: int) -> str:
-        """Returns a comma-separated number for the given integer."""
-        if self.code not in ("en", "en_US"):
-            return str(value)
-        s = str(value)
-        parts = []
-        while s:
-            parts.append(s[-3:])
-            s = s[:-3]
-        return ",".join(reversed(parts))
-
-
-class CSVLocale(Locale):
-    """Locale implementation using tornado's CSV translation format."""
-
-    def __init__(self, code: str, translations: Dict[str, Dict[str, str]]) -> None:
-        self.translations = translations
-        super(CSVLocale, self).__init__(code)
-
-    def translate(
-        self, message: str, plural_message: str = None, count: int = None
-    ) -> str:
-        if plural_message is not None:
-            assert count is not None
-            if count != 1:
-                message = plural_message
-                message_dict = self.translations.get("plural", {})
-            else:
-                message_dict = self.translations.get("singular", {})
-        else:
-            message_dict = self.translations.get("unknown", {})
-        return message_dict.get(message, message)
-
-    def pgettext(
-        self, context: str, message: str, plural_message: str = None, count: int = None
-    ) -> str:
-        if self.translations:
-            gen_log.warning("pgettext is not supported by CSVLocale")
-        return self.translate(message, plural_message, count)
-
-
-class GettextLocale(Locale):
-    """Locale implementation using the `gettext` module."""
-
-    def __init__(self, code: str, translations: gettext.NullTranslations) -> None:
-        self.ngettext = translations.ngettext
-        self.gettext = translations.gettext
-        # self.gettext must exist before __init__ is called, since it
-        # calls into self.translate
-        super(GettextLocale, self).__init__(code)
-
-    def translate(
-        self, message: str, plural_message: str = None, count: int = None
-    ) -> str:
-        if plural_message is not None:
-            assert count is not None
-            return self.ngettext(message, plural_message, count)
-        else:
-            return self.gettext(message)
-
-    def pgettext(
-        self, context: str, message: str, plural_message: str = None, count: int = None
-    ) -> str:
-        """Allows to set context for translation, accepts plural forms.
-
-        Usage example::
-
-            pgettext("law", "right")
-            pgettext("good", "right")
-
-        Plural message example::
-
-            pgettext("organization", "club", "clubs", len(clubs))
-            pgettext("stick", "club", "clubs", len(clubs))
-
-        To generate POT file with context, add following options to step 1
-        of `load_gettext_translations` sequence::
-
-            xgettext [basic options] --keyword=pgettext:1c,2 --keyword=pgettext:1c,2,3
-
-        .. versionadded:: 4.2
-        """
-        if plural_message is not None:
-            assert count is not None
-            msgs_with_ctxt = (
-                "%s%s%s" % (context, CONTEXT_SEPARATOR, message),
-                "%s%s%s" % (context, CONTEXT_SEPARATOR, plural_message),
-                count,
-            )
-            result = self.ngettext(*msgs_with_ctxt)
-            if CONTEXT_SEPARATOR in result:
-                # Translation not found
-                result = self.ngettext(message, plural_message, count)
-            return result
-        else:
-            msg_with_ctxt = "%s%s%s" % (context, CONTEXT_SEPARATOR, message)
-            result = self.gettext(msg_with_ctxt)
-            if CONTEXT_SEPARATOR in result:
-                # Translation not found
-                result = message
-            return result
diff --git a/venv/lib/python3.7/site-packages/tornado/locks.py b/venv/lib/python3.7/site-packages/tornado/locks.py
deleted file mode 100644
index 699bb30..0000000
--- a/venv/lib/python3.7/site-packages/tornado/locks.py
+++ /dev/null
@@ -1,570 +0,0 @@
-# Copyright 2015 The Tornado Authors
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-import collections
-from concurrent.futures import CancelledError
-import datetime
-import types
-
-from tornado import gen, ioloop
-from tornado.concurrent import Future, future_set_result_unless_cancelled
-
-from typing import Union, Optional, Type, Any, Awaitable
-import typing
-
-if typing.TYPE_CHECKING:
-    from typing import Deque, Set  # noqa: F401
-
-__all__ = ["Condition", "Event", "Semaphore", "BoundedSemaphore", "Lock"]
-
-
-class _TimeoutGarbageCollector(object):
-    """Base class for objects that periodically clean up timed-out waiters.
-
-    Avoids memory leak in a common pattern like:
-
-        while True:
-            yield condition.wait(short_timeout)
-            print('looping....')
-    """
-
-    def __init__(self) -> None:
-        self._waiters = collections.deque()  # type: Deque[Future]
-        self._timeouts = 0
-
-    def _garbage_collect(self) -> None:
-        # Occasionally clear timed-out waiters.
-        self._timeouts += 1
-        if self._timeouts > 100:
-            self._timeouts = 0
-            self._waiters = collections.deque(w for w in self._waiters if not w.done())
-
-
-class Condition(_TimeoutGarbageCollector):
-    """A condition allows one or more coroutines to wait until notified.
-
-    Like a standard `threading.Condition`, but does not need an underlying lock
-    that is acquired and released.
-
-    With a `Condition`, coroutines can wait to be notified by other coroutines:
-
-    .. testcode::
-
-        from tornado import gen
-        from tornado.ioloop import IOLoop
-        from tornado.locks import Condition
-
-        condition = Condition()
-
-        async def waiter():
-            print("I'll wait right here")
-            await condition.wait()
-            print("I'm done waiting")
-
-        async def notifier():
-            print("About to notify")
-            condition.notify()
-            print("Done notifying")
-
-        async def runner():
-            # Wait for waiter() and notifier() in parallel
-            await gen.multi([waiter(), notifier()])
-
-        IOLoop.current().run_sync(runner)
-
-    .. testoutput::
-
-        I'll wait right here
-        About to notify
-        Done notifying
-        I'm done waiting
-
-    `wait` takes an optional ``timeout`` argument, which is either an absolute
-    timestamp::
-
-        io_loop = IOLoop.current()
-
-        # Wait up to 1 second for a notification.
-        await condition.wait(timeout=io_loop.time() + 1)
-
-    ...or a `datetime.timedelta` for a timeout relative to the current time::
-
-        # Wait up to 1 second.
-        await condition.wait(timeout=datetime.timedelta(seconds=1))
-
-    The method returns False if there's no notification before the deadline.
-
-    .. versionchanged:: 5.0
-       Previously, waiters could be notified synchronously from within
-       `notify`. Now, the notification will always be received on the
-       next iteration of the `.IOLoop`.
-    """
-
-    def __init__(self) -> None:
-        super(Condition, self).__init__()
-        self.io_loop = ioloop.IOLoop.current()
-
-    def __repr__(self) -> str:
-        result = "<%s" % (self.__class__.__name__,)
-        if self._waiters:
-            result += " waiters[%s]" % len(self._waiters)
-        return result + ">"
-
-    def wait(self, timeout: Union[float, datetime.timedelta] = None) -> Awaitable[bool]:
-        """Wait for `.notify`.
-
-        Returns a `.Future` that resolves ``True`` if the condition is notified,
-        or ``False`` after a timeout.
-        """
-        waiter = Future()  # type: Future[bool]
-        self._waiters.append(waiter)
-        if timeout:
-
-            def on_timeout() -> None:
-                if not waiter.done():
-                    future_set_result_unless_cancelled(waiter, False)
-                self._garbage_collect()
-
-            io_loop = ioloop.IOLoop.current()
-            timeout_handle = io_loop.add_timeout(timeout, on_timeout)
-            waiter.add_done_callback(lambda _: io_loop.remove_timeout(timeout_handle))
-        return waiter
-
-    def notify(self, n: int = 1) -> None:
-        """Wake ``n`` waiters."""
-        waiters = []  # Waiters we plan to run right now.
-        while n and self._waiters:
-            waiter = self._waiters.popleft()
-            if not waiter.done():  # Might have timed out.
-                n -= 1
-                waiters.append(waiter)
-
-        for waiter in waiters:
-            future_set_result_unless_cancelled(waiter, True)
-
-    def notify_all(self) -> None:
-        """Wake all waiters."""
-        self.notify(len(self._waiters))
-
-
-class Event(object):
-    """An event blocks coroutines until its internal flag is set to True.
-
-    Similar to `threading.Event`.
-
-    A coroutine can wait for an event to be set. Once it is set, calls to
-    ``yield event.wait()`` will not block unless the event has been cleared:
-
-    .. testcode::
-
-        from tornado import gen
-        from tornado.ioloop import IOLoop
-        from tornado.locks import Event
-
-        event = Event()
-
-        async def waiter():
-            print("Waiting for event")
-            await event.wait()
-            print("Not waiting this time")
-            await event.wait()
-            print("Done")
-
-        async def setter():
-            print("About to set the event")
-            event.set()
-
-        async def runner():
-            await gen.multi([waiter(), setter()])
-
-        IOLoop.current().run_sync(runner)
-
-    .. testoutput::
-
-        Waiting for event
-        About to set the event
-        Not waiting this time
-        Done
-    """
-
-    def __init__(self) -> None:
-        self._value = False
-        self._waiters = set()  # type: Set[Future[None]]
-
-    def __repr__(self) -> str:
-        return "<%s %s>" % (
-            self.__class__.__name__,
-            "set" if self.is_set() else "clear",
-        )
-
-    def is_set(self) -> bool:
-        """Return ``True`` if the internal flag is true."""
-        return self._value
-
-    def set(self) -> None:
-        """Set the internal flag to ``True``. All waiters are awakened.
-
-        Calling `.wait` once the flag is set will not block.
-        """
-        if not self._value:
-            self._value = True
-
-            for fut in self._waiters:
-                if not fut.done():
-                    fut.set_result(None)
-
-    def clear(self) -> None:
-        """Reset the internal flag to ``False``.
-
-        Calls to `.wait` will block until `.set` is called.
-        """
-        self._value = False
-
-    def wait(self, timeout: Union[float, datetime.timedelta] = None) -> Awaitable[None]:
-        """Block until the internal flag is true.
-
-        Returns an awaitable, which raises `tornado.util.TimeoutError` after a
-        timeout.
-        """
-        fut = Future()  # type: Future[None]
-        if self._value:
-            fut.set_result(None)
-            return fut
-        self._waiters.add(fut)
-        fut.add_done_callback(lambda fut: self._waiters.remove(fut))
-        if timeout is None:
-            return fut
-        else:
-            timeout_fut = gen.with_timeout(
-                timeout, fut, quiet_exceptions=(CancelledError,)
-            )
-            # This is a slightly clumsy workaround for the fact that
-            # gen.with_timeout doesn't cancel its futures. Cancelling
-            # fut will remove it from the waiters list.
-            timeout_fut.add_done_callback(
-                lambda tf: fut.cancel() if not fut.done() else None
-            )
-            return timeout_fut
-
-
-class _ReleasingContextManager(object):
-    """Releases a Lock or Semaphore at the end of a "with" statement.
-
-        with (yield semaphore.acquire()):
-            pass
-
-        # Now semaphore.release() has been called.
-    """
-
-    def __init__(self, obj: Any) -> None:
-        self._obj = obj
-
-    def __enter__(self) -> None:
-        pass
-
-    def __exit__(
-        self,
-        exc_type: "Optional[Type[BaseException]]",
-        exc_val: Optional[BaseException],
-        exc_tb: Optional[types.TracebackType],
-    ) -> None:
-        self._obj.release()
-
-
-class Semaphore(_TimeoutGarbageCollector):
-    """A lock that can be acquired a fixed number of times before blocking.
-
-    A Semaphore manages a counter representing the number of `.release` calls
-    minus the number of `.acquire` calls, plus an initial value. The `.acquire`
-    method blocks if necessary until it can return without making the counter
-    negative.
-
-    Semaphores limit access to a shared resource. To allow access for two
-    workers at a time:
-
-    .. testsetup:: semaphore
-
-       from collections import deque
-
-       from tornado import gen
-       from tornado.ioloop import IOLoop
-       from tornado.concurrent import Future
-
-       # Ensure reliable doctest output: resolve Futures one at a time.
-       futures_q = deque([Future() for _ in range(3)])
-
-       async def simulator(futures):
-           for f in futures:
-               # simulate the asynchronous passage of time
-               await gen.sleep(0)
-               await gen.sleep(0)
-               f.set_result(None)
-
-       IOLoop.current().add_callback(simulator, list(futures_q))
-
-       def use_some_resource():
-           return futures_q.popleft()
-
-    .. testcode:: semaphore
-
-        from tornado import gen
-        from tornado.ioloop import IOLoop
-        from tornado.locks import Semaphore
-
-        sem = Semaphore(2)
-
-        async def worker(worker_id):
-            await sem.acquire()
-            try:
-                print("Worker %d is working" % worker_id)
-                await use_some_resource()
-            finally:
-                print("Worker %d is done" % worker_id)
-                sem.release()
-
-        async def runner():
-            # Join all workers.
-            await gen.multi([worker(i) for i in range(3)])
-
-        IOLoop.current().run_sync(runner)
-
-    .. testoutput:: semaphore
-
-        Worker 0 is working
-        Worker 1 is working
-        Worker 0 is done
-        Worker 2 is working
-        Worker 1 is done
-        Worker 2 is done
-
-    Workers 0 and 1 are allowed to run concurrently, but worker 2 waits until
-    the semaphore has been released once, by worker 0.
-
-    The semaphore can be used as an async context manager::
-
-        async def worker(worker_id):
-            async with sem:
-                print("Worker %d is working" % worker_id)
-                await use_some_resource()
-
-            # Now the semaphore has been released.
-            print("Worker %d is done" % worker_id)
-
-    For compatibility with older versions of Python, `.acquire` is a
-    context manager, so ``worker`` could also be written as::
-
-        @gen.coroutine
-        def worker(worker_id):
-            with (yield sem.acquire()):
-                print("Worker %d is working" % worker_id)
-                yield use_some_resource()
-
-            # Now the semaphore has been released.
-            print("Worker %d is done" % worker_id)
-
-    .. versionchanged:: 4.3
-       Added ``async with`` support in Python 3.5.
-
-    """
-
-    def __init__(self, value: int = 1) -> None:
-        super(Semaphore, self).__init__()
-        if value < 0:
-            raise ValueError("semaphore initial value must be >= 0")
-
-        self._value = value
-
-    def __repr__(self) -> str:
-        res = super(Semaphore, self).__repr__()
-        extra = (
-            "locked" if self._value == 0 else "unlocked,value:{0}".format(self._value)
-        )
-        if self._waiters:
-            extra = "{0},waiters:{1}".format(extra, len(self._waiters))
-        return "<{0} [{1}]>".format(res[1:-1], extra)
-
-    def release(self) -> None:
-        """Increment the counter and wake one waiter."""
-        self._value += 1
-        while self._waiters:
-            waiter = self._waiters.popleft()
-            if not waiter.done():
-                self._value -= 1
-
-                # If the waiter is a coroutine paused at
-                #
-                #     with (yield semaphore.acquire()):
-                #
-                # then the context manager's __exit__ calls release() at the end
-                # of the "with" block.
-                waiter.set_result(_ReleasingContextManager(self))
-                break
-
-    def acquire(
-        self, timeout: Union[float, datetime.timedelta] = None
-    ) -> Awaitable[_ReleasingContextManager]:
-        """Decrement the counter. Returns an awaitable.
-
-        Block if the counter is zero and wait for a `.release`. The awaitable
-        raises `.TimeoutError` after the deadline.
-        """
-        waiter = Future()  # type: Future[_ReleasingContextManager]
-        if self._value > 0:
-            self._value -= 1
-            waiter.set_result(_ReleasingContextManager(self))
-        else:
-            self._waiters.append(waiter)
-            if timeout:
-
-                def on_timeout() -> None:
-                    if not waiter.done():
-                        waiter.set_exception(gen.TimeoutError())
-                    self._garbage_collect()
-
-                io_loop = ioloop.IOLoop.current()
-                timeout_handle = io_loop.add_timeout(timeout, on_timeout)
-                waiter.add_done_callback(
-                    lambda _: io_loop.remove_timeout(timeout_handle)
-                )
-        return waiter
-
-    def __enter__(self) -> None:
-        raise RuntimeError("Use 'async with' instead of 'with' for Semaphore")
-
-    def __exit__(
-        self,
-        typ: "Optional[Type[BaseException]]",
-        value: Optional[BaseException],
-        traceback: Optional[types.TracebackType],
-    ) -> None:
-        self.__enter__()
-
-    async def __aenter__(self) -> None:
-        await self.acquire()
-
-    async def __aexit__(
-        self,
-        typ: "Optional[Type[BaseException]]",
-        value: Optional[BaseException],
-        tb: Optional[types.TracebackType],
-    ) -> None:
-        self.release()
-
-
-class BoundedSemaphore(Semaphore):
-    """A semaphore that prevents release() being called too many times.
-
-    If `.release` would increment the semaphore's value past the initial
-    value, it raises `ValueError`. Semaphores are mostly used to guard
-    resources with limited capacity, so a semaphore released too many times
-    is a sign of a bug.
-    """
-
-    def __init__(self, value: int = 1) -> None:
-        super(BoundedSemaphore, self).__init__(value=value)
-        self._initial_value = value
-
-    def release(self) -> None:
-        """Increment the counter and wake one waiter."""
-        if self._value >= self._initial_value:
-            raise ValueError("Semaphore released too many times")
-        super(BoundedSemaphore, self).release()
-
-
-class Lock(object):
-    """A lock for coroutines.
-
-    A Lock begins unlocked, and `acquire` locks it immediately. While it is
-    locked, a coroutine that yields `acquire` waits until another coroutine
-    calls `release`.
-
-    Releasing an unlocked lock raises `RuntimeError`.
-
-    A Lock can be used as an async context manager with the ``async
-    with`` statement:
-
-    >>> from tornado import locks
-    >>> lock = locks.Lock()
-    >>>
-    >>> async def f():
-    ...    async with lock:
-    ...        # Do something holding the lock.
-    ...        pass
-    ...
-    ...    # Now the lock is released.
-
-    For compatibility with older versions of Python, the `.acquire`
-    method asynchronously returns a regular context manager:
-
-    >>> async def f2():
-    ...    with (yield lock.acquire()):
-    ...        # Do something holding the lock.
-    ...        pass
-    ...
-    ...    # Now the lock is released.
-
-    .. versionchanged:: 4.3
-       Added ``async with`` support in Python 3.5.
-
-    """
-
-    def __init__(self) -> None:
-        self._block = BoundedSemaphore(value=1)
-
-    def __repr__(self) -> str:
-        return "<%s _block=%s>" % (self.__class__.__name__, self._block)
-
-    def acquire(
-        self, timeout: Union[float, datetime.timedelta] = None
-    ) -> Awaitable[_ReleasingContextManager]:
-        """Attempt to lock. Returns an awaitable.
-
-        Returns an awaitable, which raises `tornado.util.TimeoutError` after a
-        timeout.
-        """
-        return self._block.acquire(timeout)
-
-    def release(self) -> None:
-        """Unlock.
-
-        The first coroutine in line waiting for `acquire` gets the lock.
-
-        If not locked, raise a `RuntimeError`.
-        """
-        try:
-            self._block.release()
-        except ValueError:
-            raise RuntimeError("release unlocked lock")
-
-    def __enter__(self) -> None:
-        raise RuntimeError("Use `async with` instead of `with` for Lock")
-
-    def __exit__(
-        self,
-        typ: "Optional[Type[BaseException]]",
-        value: Optional[BaseException],
-        tb: Optional[types.TracebackType],
-    ) -> None:
-        self.__enter__()
-
-    async def __aenter__(self) -> None:
-        await self.acquire()
-
-    async def __aexit__(
-        self,
-        typ: "Optional[Type[BaseException]]",
-        value: Optional[BaseException],
-        tb: Optional[types.TracebackType],
-    ) -> None:
-        self.release()
diff --git a/venv/lib/python3.7/site-packages/tornado/log.py b/venv/lib/python3.7/site-packages/tornado/log.py
deleted file mode 100644
index 435cd71..0000000
--- a/venv/lib/python3.7/site-packages/tornado/log.py
+++ /dev/null
@@ -1,336 +0,0 @@
-#
-# Copyright 2012 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-"""Logging support for Tornado.
-
-Tornado uses three logger streams:
-
-* ``tornado.access``: Per-request logging for Tornado's HTTP servers (and
-  potentially other servers in the future)
-* ``tornado.application``: Logging of errors from application code (i.e.
-  uncaught exceptions from callbacks)
-* ``tornado.general``: General-purpose logging, including any errors
-  or warnings from Tornado itself.
-
-These streams may be configured independently using the standard library's
-`logging` module.  For example, you may wish to send ``tornado.access`` logs
-to a separate file for analysis.
-"""
-import logging
-import logging.handlers
-import sys
-
-from tornado.escape import _unicode
-from tornado.util import unicode_type, basestring_type
-
-try:
-    import colorama  # type: ignore
-except ImportError:
-    colorama = None
-
-try:
-    import curses
-except ImportError:
-    curses = None  # type: ignore
-
-from typing import Dict, Any, cast
-
-# Logger objects for internal tornado use
-access_log = logging.getLogger("tornado.access")
-app_log = logging.getLogger("tornado.application")
-gen_log = logging.getLogger("tornado.general")
-
-
-def _stderr_supports_color() -> bool:
-    try:
-        if hasattr(sys.stderr, "isatty") and sys.stderr.isatty():
-            if curses:
-                curses.setupterm()
-                if curses.tigetnum("colors") > 0:
-                    return True
-            elif colorama:
-                if sys.stderr is getattr(
-                    colorama.initialise, "wrapped_stderr", object()
-                ):
-                    return True
-    except Exception:
-        # Very broad exception handling because it's always better to
-        # fall back to non-colored logs than to break at startup.
-        pass
-    return False
-
-
-def _safe_unicode(s: Any) -> str:
-    try:
-        return _unicode(s)
-    except UnicodeDecodeError:
-        return repr(s)
-
-
-class LogFormatter(logging.Formatter):
-    """Log formatter used in Tornado.
-
-    Key features of this formatter are:
-
-    * Color support when logging to a terminal that supports it.
-    * Timestamps on every log line.
-    * Robust against str/bytes encoding problems.
-
-    This formatter is enabled automatically by
-    `tornado.options.parse_command_line` or `tornado.options.parse_config_file`
-    (unless ``--logging=none`` is used).
-
-    Color support on Windows versions that do not support ANSI color codes is
-    enabled by use of the colorama__ library. Applications that wish to use
-    this must first initialize colorama with a call to ``colorama.init``.
-    See the colorama documentation for details.
-
-    __ https://pypi.python.org/pypi/colorama
-
-    .. versionchanged:: 4.5
-       Added support for ``colorama``. Changed the constructor
-       signature to be compatible with `logging.config.dictConfig`.
-    """
-
-    DEFAULT_FORMAT = "%(color)s[%(levelname)1.1s %(asctime)s %(module)s:%(lineno)d]%(end_color)s %(message)s"  # noqa: E501
-    DEFAULT_DATE_FORMAT = "%y%m%d %H:%M:%S"
-    DEFAULT_COLORS = {
-        logging.DEBUG: 4,  # Blue
-        logging.INFO: 2,  # Green
-        logging.WARNING: 3,  # Yellow
-        logging.ERROR: 1,  # Red
-    }
-
-    def __init__(
-        self,
-        fmt: str = DEFAULT_FORMAT,
-        datefmt: str = DEFAULT_DATE_FORMAT,
-        style: str = "%",
-        color: bool = True,
-        colors: Dict[int, int] = DEFAULT_COLORS,
-    ) -> None:
-        r"""
-        :arg bool color: Enables color support.
-        :arg str fmt: Log message format.
-          It will be applied to the attributes dict of log records. The
-          text between ``%(color)s`` and ``%(end_color)s`` will be colored
-          depending on the level if color support is on.
-        :arg dict colors: color mappings from logging level to terminal color
-          code
-        :arg str datefmt: Datetime format.
-          Used for formatting ``(asctime)`` placeholder in ``prefix_fmt``.
-
-        .. versionchanged:: 3.2
-
-           Added ``fmt`` and ``datefmt`` arguments.
-        """
-        logging.Formatter.__init__(self, datefmt=datefmt)
-        self._fmt = fmt
-
-        self._colors = {}  # type: Dict[int, str]
-        if color and _stderr_supports_color():
-            if curses is not None:
-                fg_color = curses.tigetstr("setaf") or curses.tigetstr("setf") or b""
-
-                for levelno, code in colors.items():
-                    # Convert the terminal control characters from
-                    # bytes to unicode strings for easier use with the
-                    # logging module.
-                    self._colors[levelno] = unicode_type(
-                        curses.tparm(fg_color, code), "ascii"
-                    )
-                self._normal = unicode_type(curses.tigetstr("sgr0"), "ascii")
-            else:
-                # If curses is not present (currently we'll only get here for
-                # colorama on windows), assume hard-coded ANSI color codes.
-                for levelno, code in colors.items():
-                    self._colors[levelno] = "\033[2;3%dm" % code
-                self._normal = "\033[0m"
-        else:
-            self._normal = ""
-
-    def format(self, record: Any) -> str:
-        try:
-            message = record.getMessage()
-            assert isinstance(message, basestring_type)  # guaranteed by logging
-            # Encoding notes:  The logging module prefers to work with character
-            # strings, but only enforces that log messages are instances of
-            # basestring.  In python 2, non-ascii bytestrings will make
-            # their way through the logging framework until they blow up with
-            # an unhelpful decoding error (with this formatter it happens
-            # when we attach the prefix, but there are other opportunities for
-            # exceptions further along in the framework).
-            #
-            # If a byte string makes it this far, convert it to unicode to
-            # ensure it will make it out to the logs.  Use repr() as a fallback
-            # to ensure that all byte strings can be converted successfully,
-            # but don't do it by default so we don't add extra quotes to ascii
-            # bytestrings.  This is a bit of a hacky place to do this, but
-            # it's worth it since the encoding errors that would otherwise
-            # result are so useless (and tornado is fond of using utf8-encoded
-            # byte strings wherever possible).
-            record.message = _safe_unicode(message)
-        except Exception as e:
-            record.message = "Bad message (%r): %r" % (e, record.__dict__)
-
-        record.asctime = self.formatTime(record, cast(str, self.datefmt))
-
-        if record.levelno in self._colors:
-            record.color = self._colors[record.levelno]
-            record.end_color = self._normal
-        else:
-            record.color = record.end_color = ""
-
-        formatted = self._fmt % record.__dict__
-
-        if record.exc_info:
-            if not record.exc_text:
-                record.exc_text = self.formatException(record.exc_info)
-        if record.exc_text:
-            # exc_text contains multiple lines.  We need to _safe_unicode
-            # each line separately so that non-utf8 bytes don't cause
-            # all the newlines to turn into '\n'.
-            lines = [formatted.rstrip()]
-            lines.extend(_safe_unicode(ln) for ln in record.exc_text.split("\n"))
-            formatted = "\n".join(lines)
-        return formatted.replace("\n", "\n    ")
-
-
-def enable_pretty_logging(options: Any = None, logger: logging.Logger = None) -> None:
-    """Turns on formatted logging output as configured.
-
-    This is called automatically by `tornado.options.parse_command_line`
-    and `tornado.options.parse_config_file`.
-    """
-    if options is None:
-        import tornado.options
-
-        options = tornado.options.options
-    if options.logging is None or options.logging.lower() == "none":
-        return
-    if logger is None:
-        logger = logging.getLogger()
-    logger.setLevel(getattr(logging, options.logging.upper()))
-    if options.log_file_prefix:
-        rotate_mode = options.log_rotate_mode
-        if rotate_mode == "size":
-            channel = logging.handlers.RotatingFileHandler(
-                filename=options.log_file_prefix,
-                maxBytes=options.log_file_max_size,
-                backupCount=options.log_file_num_backups,
-                encoding="utf-8",
-            )  # type: logging.Handler
-        elif rotate_mode == "time":
-            channel = logging.handlers.TimedRotatingFileHandler(
-                filename=options.log_file_prefix,
-                when=options.log_rotate_when,
-                interval=options.log_rotate_interval,
-                backupCount=options.log_file_num_backups,
-                encoding="utf-8",
-            )
-        else:
-            error_message = (
-                "The value of log_rotate_mode option should be "
-                + '"size" or "time", not "%s".' % rotate_mode
-            )
-            raise ValueError(error_message)
-        channel.setFormatter(LogFormatter(color=False))
-        logger.addHandler(channel)
-
-    if options.log_to_stderr or (options.log_to_stderr is None and not logger.handlers):
-        # Set up color if we are in a tty and curses is installed
-        channel = logging.StreamHandler()
-        channel.setFormatter(LogFormatter())
-        logger.addHandler(channel)
-
-
-def define_logging_options(options: Any = None) -> None:
-    """Add logging-related flags to ``options``.
-
-    These options are present automatically on the default options instance;
-    this method is only necessary if you have created your own `.OptionParser`.
-
-    .. versionadded:: 4.2
-        This function existed in prior versions but was broken and undocumented until 4.2.
-    """
-    if options is None:
-        # late import to prevent cycle
-        import tornado.options
-
-        options = tornado.options.options
-    options.define(
-        "logging",
-        default="info",
-        help=(
-            "Set the Python log level. If 'none', tornado won't touch the "
-            "logging configuration."
-        ),
-        metavar="debug|info|warning|error|none",
-    )
-    options.define(
-        "log_to_stderr",
-        type=bool,
-        default=None,
-        help=(
-            "Send log output to stderr (colorized if possible). "
-            "By default use stderr if --log_file_prefix is not set and "
-            "no other logging is configured."
-        ),
-    )
-    options.define(
-        "log_file_prefix",
-        type=str,
-        default=None,
-        metavar="PATH",
-        help=(
-            "Path prefix for log files. "
-            "Note that if you are running multiple tornado processes, "
-            "log_file_prefix must be different for each of them (e.g. "
-            "include the port number)"
-        ),
-    )
-    options.define(
-        "log_file_max_size",
-        type=int,
-        default=100 * 1000 * 1000,
-        help="max size of log files before rollover",
-    )
-    options.define(
-        "log_file_num_backups", type=int, default=10, help="number of log files to keep"
-    )
-
-    options.define(
-        "log_rotate_when",
-        type=str,
-        default="midnight",
-        help=(
-            "specify the type of TimedRotatingFileHandler interval "
-            "other options:('S', 'M', 'H', 'D', 'W0'-'W6')"
-        ),
-    )
-    options.define(
-        "log_rotate_interval",
-        type=int,
-        default=1,
-        help="The interval value of timed rotating",
-    )
-
-    options.define(
-        "log_rotate_mode",
-        type=str,
-        default="size",
-        help="The mode of rotating files(time or size)",
-    )
-
-    options.add_parse_callback(lambda: enable_pretty_logging(options))
diff --git a/venv/lib/python3.7/site-packages/tornado/netutil.py b/venv/lib/python3.7/site-packages/tornado/netutil.py
deleted file mode 100644
index 9338ced..0000000
--- a/venv/lib/python3.7/site-packages/tornado/netutil.py
+++ /dev/null
@@ -1,614 +0,0 @@
-#
-# Copyright 2011 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-"""Miscellaneous network utility code."""
-
-import concurrent.futures
-import errno
-import os
-import sys
-import socket
-import ssl
-import stat
-
-from tornado.concurrent import dummy_executor, run_on_executor
-from tornado.ioloop import IOLoop
-from tornado.platform.auto import set_close_exec
-from tornado.util import Configurable, errno_from_exception
-
-import typing
-from typing import List, Callable, Any, Type, Dict, Union, Tuple, Awaitable
-
-if typing.TYPE_CHECKING:
-    from asyncio import Future  # noqa: F401
-
-# Note that the naming of ssl.Purpose is confusing; the purpose
-# of a context is to authentiate the opposite side of the connection.
-_client_ssl_defaults = ssl.create_default_context(ssl.Purpose.SERVER_AUTH)
-_server_ssl_defaults = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
-if hasattr(ssl, "OP_NO_COMPRESSION"):
-    # See netutil.ssl_options_to_context
-    _client_ssl_defaults.options |= ssl.OP_NO_COMPRESSION
-    _server_ssl_defaults.options |= ssl.OP_NO_COMPRESSION
-
-# ThreadedResolver runs getaddrinfo on a thread. If the hostname is unicode,
-# getaddrinfo attempts to import encodings.idna. If this is done at
-# module-import time, the import lock is already held by the main thread,
-# leading to deadlock. Avoid it by caching the idna encoder on the main
-# thread now.
-u"foo".encode("idna")
-
-# For undiagnosed reasons, 'latin1' codec may also need to be preloaded.
-u"foo".encode("latin1")
-
-# These errnos indicate that a non-blocking operation must be retried
-# at a later time.  On most platforms they're the same value, but on
-# some they differ.
-_ERRNO_WOULDBLOCK = (errno.EWOULDBLOCK, errno.EAGAIN)
-
-if hasattr(errno, "WSAEWOULDBLOCK"):
-    _ERRNO_WOULDBLOCK += (errno.WSAEWOULDBLOCK,)  # type: ignore
-
-# Default backlog used when calling sock.listen()
-_DEFAULT_BACKLOG = 128
-
-
-def bind_sockets(
-    port: int,
-    address: str = None,
-    family: socket.AddressFamily = socket.AF_UNSPEC,
-    backlog: int = _DEFAULT_BACKLOG,
-    flags: int = None,
-    reuse_port: bool = False,
-) -> List[socket.socket]:
-    """Creates listening sockets bound to the given port and address.
-
-    Returns a list of socket objects (multiple sockets are returned if
-    the given address maps to multiple IP addresses, which is most common
-    for mixed IPv4 and IPv6 use).
-
-    Address may be either an IP address or hostname.  If it's a hostname,
-    the server will listen on all IP addresses associated with the
-    name.  Address may be an empty string or None to listen on all
-    available interfaces.  Family may be set to either `socket.AF_INET`
-    or `socket.AF_INET6` to restrict to IPv4 or IPv6 addresses, otherwise
-    both will be used if available.
-
-    The ``backlog`` argument has the same meaning as for
-    `socket.listen() <socket.socket.listen>`.
-
-    ``flags`` is a bitmask of AI_* flags to `~socket.getaddrinfo`, like
-    ``socket.AI_PASSIVE | socket.AI_NUMERICHOST``.
-
-    ``reuse_port`` option sets ``SO_REUSEPORT`` option for every socket
-    in the list. If your platform doesn't support this option ValueError will
-    be raised.
-    """
-    if reuse_port and not hasattr(socket, "SO_REUSEPORT"):
-        raise ValueError("the platform doesn't support SO_REUSEPORT")
-
-    sockets = []
-    if address == "":
-        address = None
-    if not socket.has_ipv6 and family == socket.AF_UNSPEC:
-        # Python can be compiled with --disable-ipv6, which causes
-        # operations on AF_INET6 sockets to fail, but does not
-        # automatically exclude those results from getaddrinfo
-        # results.
-        # http://bugs.python.org/issue16208
-        family = socket.AF_INET
-    if flags is None:
-        flags = socket.AI_PASSIVE
-    bound_port = None
-    unique_addresses = set()  # type: set
-    for res in sorted(
-        socket.getaddrinfo(address, port, family, socket.SOCK_STREAM, 0, flags),
-        key=lambda x: x[0],
-    ):
-        if res in unique_addresses:
-            continue
-
-        unique_addresses.add(res)
-
-        af, socktype, proto, canonname, sockaddr = res
-        if (
-            sys.platform == "darwin"
-            and address == "localhost"
-            and af == socket.AF_INET6
-            and sockaddr[3] != 0
-        ):
-            # Mac OS X includes a link-local address fe80::1%lo0 in the
-            # getaddrinfo results for 'localhost'.  However, the firewall
-            # doesn't understand that this is a local address and will
-            # prompt for access (often repeatedly, due to an apparent
-            # bug in its ability to remember granting access to an
-            # application). Skip these addresses.
-            continue
-        try:
-            sock = socket.socket(af, socktype, proto)
-        except socket.error as e:
-            if errno_from_exception(e) == errno.EAFNOSUPPORT:
-                continue
-            raise
-        set_close_exec(sock.fileno())
-        if os.name != "nt":
-            try:
-                sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
-            except socket.error as e:
-                if errno_from_exception(e) != errno.ENOPROTOOPT:
-                    # Hurd doesn't support SO_REUSEADDR.
-                    raise
-        if reuse_port:
-            sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
-        if af == socket.AF_INET6:
-            # On linux, ipv6 sockets accept ipv4 too by default,
-            # but this makes it impossible to bind to both
-            # 0.0.0.0 in ipv4 and :: in ipv6.  On other systems,
-            # separate sockets *must* be used to listen for both ipv4
-            # and ipv6.  For consistency, always disable ipv4 on our
-            # ipv6 sockets and use a separate ipv4 socket when needed.
-            #
-            # Python 2.x on windows doesn't have IPPROTO_IPV6.
-            if hasattr(socket, "IPPROTO_IPV6"):
-                sock.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_V6ONLY, 1)
-
-        # automatic port allocation with port=None
-        # should bind on the same port on IPv4 and IPv6
-        host, requested_port = sockaddr[:2]
-        if requested_port == 0 and bound_port is not None:
-            sockaddr = tuple([host, bound_port] + list(sockaddr[2:]))
-
-        sock.setblocking(False)
-        sock.bind(sockaddr)
-        bound_port = sock.getsockname()[1]
-        sock.listen(backlog)
-        sockets.append(sock)
-    return sockets
-
-
-if hasattr(socket, "AF_UNIX"):
-
-    def bind_unix_socket(
-        file: str, mode: int = 0o600, backlog: int = _DEFAULT_BACKLOG
-    ) -> socket.socket:
-        """Creates a listening unix socket.
-
-        If a socket with the given name already exists, it will be deleted.
-        If any other file with that name exists, an exception will be
-        raised.
-
-        Returns a socket object (not a list of socket objects like
-        `bind_sockets`)
-        """
-        sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
-        set_close_exec(sock.fileno())
-        try:
-            sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
-        except socket.error as e:
-            if errno_from_exception(e) != errno.ENOPROTOOPT:
-                # Hurd doesn't support SO_REUSEADDR
-                raise
-        sock.setblocking(False)
-        try:
-            st = os.stat(file)
-        except OSError as err:
-            if errno_from_exception(err) != errno.ENOENT:
-                raise
-        else:
-            if stat.S_ISSOCK(st.st_mode):
-                os.remove(file)
-            else:
-                raise ValueError("File %s exists and is not a socket", file)
-        sock.bind(file)
-        os.chmod(file, mode)
-        sock.listen(backlog)
-        return sock
-
-
-def add_accept_handler(
-    sock: socket.socket, callback: Callable[[socket.socket, Any], None]
-) -> Callable[[], None]:
-    """Adds an `.IOLoop` event handler to accept new connections on ``sock``.
-
-    When a connection is accepted, ``callback(connection, address)`` will
-    be run (``connection`` is a socket object, and ``address`` is the
-    address of the other end of the connection).  Note that this signature
-    is different from the ``callback(fd, events)`` signature used for
-    `.IOLoop` handlers.
-
-    A callable is returned which, when called, will remove the `.IOLoop`
-    event handler and stop processing further incoming connections.
-
-    .. versionchanged:: 5.0
-       The ``io_loop`` argument (deprecated since version 4.1) has been removed.
-
-    .. versionchanged:: 5.0
-       A callable is returned (``None`` was returned before).
-    """
-    io_loop = IOLoop.current()
-    removed = [False]
-
-    def accept_handler(fd: socket.socket, events: int) -> None:
-        # More connections may come in while we're handling callbacks;
-        # to prevent starvation of other tasks we must limit the number
-        # of connections we accept at a time.  Ideally we would accept
-        # up to the number of connections that were waiting when we
-        # entered this method, but this information is not available
-        # (and rearranging this method to call accept() as many times
-        # as possible before running any callbacks would have adverse
-        # effects on load balancing in multiprocess configurations).
-        # Instead, we use the (default) listen backlog as a rough
-        # heuristic for the number of connections we can reasonably
-        # accept at once.
-        for i in range(_DEFAULT_BACKLOG):
-            if removed[0]:
-                # The socket was probably closed
-                return
-            try:
-                connection, address = sock.accept()
-            except socket.error as e:
-                # _ERRNO_WOULDBLOCK indicate we have accepted every
-                # connection that is available.
-                if errno_from_exception(e) in _ERRNO_WOULDBLOCK:
-                    return
-                # ECONNABORTED indicates that there was a connection
-                # but it was closed while still in the accept queue.
-                # (observed on FreeBSD).
-                if errno_from_exception(e) == errno.ECONNABORTED:
-                    continue
-                raise
-            set_close_exec(connection.fileno())
-            callback(connection, address)
-
-    def remove_handler() -> None:
-        io_loop.remove_handler(sock)
-        removed[0] = True
-
-    io_loop.add_handler(sock, accept_handler, IOLoop.READ)
-    return remove_handler
-
-
-def is_valid_ip(ip: str) -> bool:
-    """Returns ``True`` if the given string is a well-formed IP address.
-
-    Supports IPv4 and IPv6.
-    """
-    if not ip or "\x00" in ip:
-        # getaddrinfo resolves empty strings to localhost, and truncates
-        # on zero bytes.
-        return False
-    try:
-        res = socket.getaddrinfo(
-            ip, 0, socket.AF_UNSPEC, socket.SOCK_STREAM, 0, socket.AI_NUMERICHOST
-        )
-        return bool(res)
-    except socket.gaierror as e:
-        if e.args[0] == socket.EAI_NONAME:
-            return False
-        raise
-    return True
-
-
-class Resolver(Configurable):
-    """Configurable asynchronous DNS resolver interface.
-
-    By default, a blocking implementation is used (which simply calls
-    `socket.getaddrinfo`).  An alternative implementation can be
-    chosen with the `Resolver.configure <.Configurable.configure>`
-    class method::
-
-        Resolver.configure('tornado.netutil.ThreadedResolver')
-
-    The implementations of this interface included with Tornado are
-
-    * `tornado.netutil.DefaultExecutorResolver`
-    * `tornado.netutil.BlockingResolver` (deprecated)
-    * `tornado.netutil.ThreadedResolver` (deprecated)
-    * `tornado.netutil.OverrideResolver`
-    * `tornado.platform.twisted.TwistedResolver`
-    * `tornado.platform.caresresolver.CaresResolver`
-
-    .. versionchanged:: 5.0
-       The default implementation has changed from `BlockingResolver` to
-       `DefaultExecutorResolver`.
-    """
-
-    @classmethod
-    def configurable_base(cls) -> Type["Resolver"]:
-        return Resolver
-
-    @classmethod
-    def configurable_default(cls) -> Type["Resolver"]:
-        return DefaultExecutorResolver
-
-    def resolve(
-        self, host: str, port: int, family: socket.AddressFamily = socket.AF_UNSPEC
-    ) -> Awaitable[List[Tuple[int, Any]]]:
-        """Resolves an address.
-
-        The ``host`` argument is a string which may be a hostname or a
-        literal IP address.
-
-        Returns a `.Future` whose result is a list of (family,
-        address) pairs, where address is a tuple suitable to pass to
-        `socket.connect <socket.socket.connect>` (i.e. a ``(host,
-        port)`` pair for IPv4; additional fields may be present for
-        IPv6). If a ``callback`` is passed, it will be run with the
-        result as an argument when it is complete.
-
-        :raises IOError: if the address cannot be resolved.
-
-        .. versionchanged:: 4.4
-           Standardized all implementations to raise `IOError`.
-
-        .. versionchanged:: 6.0 The ``callback`` argument was removed.
-           Use the returned awaitable object instead.
-
-        """
-        raise NotImplementedError()
-
-    def close(self) -> None:
-        """Closes the `Resolver`, freeing any resources used.
-
-        .. versionadded:: 3.1
-
-        """
-        pass
-
-
-def _resolve_addr(
-    host: str, port: int, family: socket.AddressFamily = socket.AF_UNSPEC
-) -> List[Tuple[int, Any]]:
-    # On Solaris, getaddrinfo fails if the given port is not found
-    # in /etc/services and no socket type is given, so we must pass
-    # one here.  The socket type used here doesn't seem to actually
-    # matter (we discard the one we get back in the results),
-    # so the addresses we return should still be usable with SOCK_DGRAM.
-    addrinfo = socket.getaddrinfo(host, port, family, socket.SOCK_STREAM)
-    results = []
-    for fam, socktype, proto, canonname, address in addrinfo:
-        results.append((fam, address))
-    return results
-
-
-class DefaultExecutorResolver(Resolver):
-    """Resolver implementation using `.IOLoop.run_in_executor`.
-
-    .. versionadded:: 5.0
-    """
-
-    async def resolve(
-        self, host: str, port: int, family: socket.AddressFamily = socket.AF_UNSPEC
-    ) -> List[Tuple[int, Any]]:
-        result = await IOLoop.current().run_in_executor(
-            None, _resolve_addr, host, port, family
-        )
-        return result
-
-
-class ExecutorResolver(Resolver):
-    """Resolver implementation using a `concurrent.futures.Executor`.
-
-    Use this instead of `ThreadedResolver` when you require additional
-    control over the executor being used.
-
-    The executor will be shut down when the resolver is closed unless
-    ``close_resolver=False``; use this if you want to reuse the same
-    executor elsewhere.
-
-    .. versionchanged:: 5.0
-       The ``io_loop`` argument (deprecated since version 4.1) has been removed.
-
-    .. deprecated:: 5.0
-       The default `Resolver` now uses `.IOLoop.run_in_executor`; use that instead
-       of this class.
-    """
-
-    def initialize(
-        self, executor: concurrent.futures.Executor = None, close_executor: bool = True
-    ) -> None:
-        self.io_loop = IOLoop.current()
-        if executor is not None:
-            self.executor = executor
-            self.close_executor = close_executor
-        else:
-            self.executor = dummy_executor
-            self.close_executor = False
-
-    def close(self) -> None:
-        if self.close_executor:
-            self.executor.shutdown()
-        self.executor = None  # type: ignore
-
-    @run_on_executor
-    def resolve(
-        self, host: str, port: int, family: socket.AddressFamily = socket.AF_UNSPEC
-    ) -> List[Tuple[int, Any]]:
-        return _resolve_addr(host, port, family)
-
-
-class BlockingResolver(ExecutorResolver):
-    """Default `Resolver` implementation, using `socket.getaddrinfo`.
-
-    The `.IOLoop` will be blocked during the resolution, although the
-    callback will not be run until the next `.IOLoop` iteration.
-
-    .. deprecated:: 5.0
-       The default `Resolver` now uses `.IOLoop.run_in_executor`; use that instead
-       of this class.
-    """
-
-    def initialize(self) -> None:  # type: ignore
-        super(BlockingResolver, self).initialize()
-
-
-class ThreadedResolver(ExecutorResolver):
-    """Multithreaded non-blocking `Resolver` implementation.
-
-    Requires the `concurrent.futures` package to be installed
-    (available in the standard library since Python 3.2,
-    installable with ``pip install futures`` in older versions).
-
-    The thread pool size can be configured with::
-
-        Resolver.configure('tornado.netutil.ThreadedResolver',
-                           num_threads=10)
-
-    .. versionchanged:: 3.1
-       All ``ThreadedResolvers`` share a single thread pool, whose
-       size is set by the first one to be created.
-
-    .. deprecated:: 5.0
-       The default `Resolver` now uses `.IOLoop.run_in_executor`; use that instead
-       of this class.
-    """
-
-    _threadpool = None  # type: ignore
-    _threadpool_pid = None  # type: int
-
-    def initialize(self, num_threads: int = 10) -> None:  # type: ignore
-        threadpool = ThreadedResolver._create_threadpool(num_threads)
-        super(ThreadedResolver, self).initialize(
-            executor=threadpool, close_executor=False
-        )
-
-    @classmethod
-    def _create_threadpool(
-        cls, num_threads: int
-    ) -> concurrent.futures.ThreadPoolExecutor:
-        pid = os.getpid()
-        if cls._threadpool_pid != pid:
-            # Threads cannot survive after a fork, so if our pid isn't what it
-            # was when we created the pool then delete it.
-            cls._threadpool = None
-        if cls._threadpool is None:
-            cls._threadpool = concurrent.futures.ThreadPoolExecutor(num_threads)
-            cls._threadpool_pid = pid
-        return cls._threadpool
-
-
-class OverrideResolver(Resolver):
-    """Wraps a resolver with a mapping of overrides.
-
-    This can be used to make local DNS changes (e.g. for testing)
-    without modifying system-wide settings.
-
-    The mapping can be in three formats::
-
-        {
-            # Hostname to host or ip
-            "example.com": "127.0.1.1",
-
-            # Host+port to host+port
-            ("login.example.com", 443): ("localhost", 1443),
-
-            # Host+port+address family to host+port
-            ("login.example.com", 443, socket.AF_INET6): ("::1", 1443),
-        }
-
-    .. versionchanged:: 5.0
-       Added support for host-port-family triplets.
-    """
-
-    def initialize(self, resolver: Resolver, mapping: dict) -> None:
-        self.resolver = resolver
-        self.mapping = mapping
-
-    def close(self) -> None:
-        self.resolver.close()
-
-    def resolve(
-        self, host: str, port: int, family: socket.AddressFamily = socket.AF_UNSPEC
-    ) -> Awaitable[List[Tuple[int, Any]]]:
-        if (host, port, family) in self.mapping:
-            host, port = self.mapping[(host, port, family)]
-        elif (host, port) in self.mapping:
-            host, port = self.mapping[(host, port)]
-        elif host in self.mapping:
-            host = self.mapping[host]
-        return self.resolver.resolve(host, port, family)
-
-
-# These are the keyword arguments to ssl.wrap_socket that must be translated
-# to their SSLContext equivalents (the other arguments are still passed
-# to SSLContext.wrap_socket).
-_SSL_CONTEXT_KEYWORDS = frozenset(
-    ["ssl_version", "certfile", "keyfile", "cert_reqs", "ca_certs", "ciphers"]
-)
-
-
-def ssl_options_to_context(
-    ssl_options: Union[Dict[str, Any], ssl.SSLContext]
-) -> ssl.SSLContext:
-    """Try to convert an ``ssl_options`` dictionary to an
-    `~ssl.SSLContext` object.
-
-    The ``ssl_options`` dictionary contains keywords to be passed to
-    `ssl.wrap_socket`.  In Python 2.7.9+, `ssl.SSLContext` objects can
-    be used instead.  This function converts the dict form to its
-    `~ssl.SSLContext` equivalent, and may be used when a component which
-    accepts both forms needs to upgrade to the `~ssl.SSLContext` version
-    to use features like SNI or NPN.
-    """
-    if isinstance(ssl_options, ssl.SSLContext):
-        return ssl_options
-    assert isinstance(ssl_options, dict)
-    assert all(k in _SSL_CONTEXT_KEYWORDS for k in ssl_options), ssl_options
-    # Can't use create_default_context since this interface doesn't
-    # tell us client vs server.
-    context = ssl.SSLContext(ssl_options.get("ssl_version", ssl.PROTOCOL_SSLv23))
-    if "certfile" in ssl_options:
-        context.load_cert_chain(
-            ssl_options["certfile"], ssl_options.get("keyfile", None)
-        )
-    if "cert_reqs" in ssl_options:
-        context.verify_mode = ssl_options["cert_reqs"]
-    if "ca_certs" in ssl_options:
-        context.load_verify_locations(ssl_options["ca_certs"])
-    if "ciphers" in ssl_options:
-        context.set_ciphers(ssl_options["ciphers"])
-    if hasattr(ssl, "OP_NO_COMPRESSION"):
-        # Disable TLS compression to avoid CRIME and related attacks.
-        # This constant depends on openssl version 1.0.
-        # TODO: Do we need to do this ourselves or can we trust
-        # the defaults?
-        context.options |= ssl.OP_NO_COMPRESSION
-    return context
-
-
-def ssl_wrap_socket(
-    socket: socket.socket,
-    ssl_options: Union[Dict[str, Any], ssl.SSLContext],
-    server_hostname: str = None,
-    **kwargs: Any
-) -> ssl.SSLSocket:
-    """Returns an ``ssl.SSLSocket`` wrapping the given socket.
-
-    ``ssl_options`` may be either an `ssl.SSLContext` object or a
-    dictionary (as accepted by `ssl_options_to_context`).  Additional
-    keyword arguments are passed to ``wrap_socket`` (either the
-    `~ssl.SSLContext` method or the `ssl` module function as
-    appropriate).
-    """
-    context = ssl_options_to_context(ssl_options)
-    if ssl.HAS_SNI:
-        # In python 3.4, wrap_socket only accepts the server_hostname
-        # argument if HAS_SNI is true.
-        # TODO: add a unittest (python added server-side SNI support in 3.4)
-        # In the meantime it can be manually tested with
-        # python3 -m tornado.httpclient https://sni.velox.ch
-        return context.wrap_socket(socket, server_hostname=server_hostname, **kwargs)
-    else:
-        return context.wrap_socket(socket, **kwargs)
diff --git a/venv/lib/python3.7/site-packages/tornado/options.py b/venv/lib/python3.7/site-packages/tornado/options.py
deleted file mode 100644
index 4449ffa..0000000
--- a/venv/lib/python3.7/site-packages/tornado/options.py
+++ /dev/null
@@ -1,726 +0,0 @@
-#
-# Copyright 2009 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-"""A command line parsing module that lets modules define their own options.
-
-This module is inspired by Google's `gflags
-<https://github.com/google/python-gflags>`_. The primary difference
-with libraries such as `argparse` is that a global registry is used so
-that options may be defined in any module (it also enables
-`tornado.log` by default). The rest of Tornado does not depend on this
-module, so feel free to use `argparse` or other configuration
-libraries if you prefer them.
-
-Options must be defined with `tornado.options.define` before use,
-generally at the top level of a module. The options are then
-accessible as attributes of `tornado.options.options`::
-
-    # myapp/db.py
-    from tornado.options import define, options
-
-    define("mysql_host", default="127.0.0.1:3306", help="Main user DB")
-    define("memcache_hosts", default="127.0.0.1:11011", multiple=True,
-           help="Main user memcache servers")
-
-    def connect():
-        db = database.Connection(options.mysql_host)
-        ...
-
-    # myapp/server.py
-    from tornado.options import define, options
-
-    define("port", default=8080, help="port to listen on")
-
-    def start_server():
-        app = make_app()
-        app.listen(options.port)
-
-The ``main()`` method of your application does not need to be aware of all of
-the options used throughout your program; they are all automatically loaded
-when the modules are loaded.  However, all modules that define options
-must have been imported before the command line is parsed.
-
-Your ``main()`` method can parse the command line or parse a config file with
-either `parse_command_line` or `parse_config_file`::
-
-    import myapp.db, myapp.server
-    import tornado.options
-
-    if __name__ == '__main__':
-        tornado.options.parse_command_line()
-        # or
-        tornado.options.parse_config_file("/etc/server.conf")
-
-.. note::
-
-   When using multiple ``parse_*`` functions, pass ``final=False`` to all
-   but the last one, or side effects may occur twice (in particular,
-   this can result in log messages being doubled).
-
-`tornado.options.options` is a singleton instance of `OptionParser`, and
-the top-level functions in this module (`define`, `parse_command_line`, etc)
-simply call methods on it.  You may create additional `OptionParser`
-instances to define isolated sets of options, such as for subcommands.
-
-.. note::
-
-   By default, several options are defined that will configure the
-   standard `logging` module when `parse_command_line` or `parse_config_file`
-   are called.  If you want Tornado to leave the logging configuration
-   alone so you can manage it yourself, either pass ``--logging=none``
-   on the command line or do the following to disable it in code::
-
-       from tornado.options import options, parse_command_line
-       options.logging = None
-       parse_command_line()
-
-.. versionchanged:: 4.3
-   Dashes and underscores are fully interchangeable in option names;
-   options can be defined, set, and read with any mix of the two.
-   Dashes are typical for command-line usage while config files require
-   underscores.
-"""
-
-import datetime
-import numbers
-import re
-import sys
-import os
-import textwrap
-
-from tornado.escape import _unicode, native_str
-from tornado.log import define_logging_options
-from tornado.util import basestring_type, exec_in
-
-import typing
-from typing import Any, Iterator, Iterable, Tuple, Set, Dict, Callable, List, TextIO
-
-if typing.TYPE_CHECKING:
-    from typing import Optional  # noqa: F401
-
-
-class Error(Exception):
-    """Exception raised by errors in the options module."""
-
-    pass
-
-
-class OptionParser(object):
-    """A collection of options, a dictionary with object-like access.
-
-    Normally accessed via static functions in the `tornado.options` module,
-    which reference a global instance.
-    """
-
-    def __init__(self) -> None:
-        # we have to use self.__dict__ because we override setattr.
-        self.__dict__["_options"] = {}
-        self.__dict__["_parse_callbacks"] = []
-        self.define(
-            "help",
-            type=bool,
-            help="show this help information",
-            callback=self._help_callback,
-        )
-
-    def _normalize_name(self, name: str) -> str:
-        return name.replace("_", "-")
-
-    def __getattr__(self, name: str) -> Any:
-        name = self._normalize_name(name)
-        if isinstance(self._options.get(name), _Option):
-            return self._options[name].value()
-        raise AttributeError("Unrecognized option %r" % name)
-
-    def __setattr__(self, name: str, value: Any) -> None:
-        name = self._normalize_name(name)
-        if isinstance(self._options.get(name), _Option):
-            return self._options[name].set(value)
-        raise AttributeError("Unrecognized option %r" % name)
-
-    def __iter__(self) -> Iterator:
-        return (opt.name for opt in self._options.values())
-
-    def __contains__(self, name: str) -> bool:
-        name = self._normalize_name(name)
-        return name in self._options
-
-    def __getitem__(self, name: str) -> Any:
-        return self.__getattr__(name)
-
-    def __setitem__(self, name: str, value: Any) -> None:
-        return self.__setattr__(name, value)
-
-    def items(self) -> Iterable[Tuple[str, Any]]:
-        """An iterable of (name, value) pairs.
-
-        .. versionadded:: 3.1
-        """
-        return [(opt.name, opt.value()) for name, opt in self._options.items()]
-
-    def groups(self) -> Set[str]:
-        """The set of option-groups created by ``define``.
-
-        .. versionadded:: 3.1
-        """
-        return set(opt.group_name for opt in self._options.values())
-
-    def group_dict(self, group: str) -> Dict[str, Any]:
-        """The names and values of options in a group.
-
-        Useful for copying options into Application settings::
-
-            from tornado.options import define, parse_command_line, options
-
-            define('template_path', group='application')
-            define('static_path', group='application')
-
-            parse_command_line()
-
-            application = Application(
-                handlers, **options.group_dict('application'))
-
-        .. versionadded:: 3.1
-        """
-        return dict(
-            (opt.name, opt.value())
-            for name, opt in self._options.items()
-            if not group or group == opt.group_name
-        )
-
-    def as_dict(self) -> Dict[str, Any]:
-        """The names and values of all options.
-
-        .. versionadded:: 3.1
-        """
-        return dict((opt.name, opt.value()) for name, opt in self._options.items())
-
-    def define(
-        self,
-        name: str,
-        default: Any = None,
-        type: type = None,
-        help: str = None,
-        metavar: str = None,
-        multiple: bool = False,
-        group: str = None,
-        callback: Callable[[Any], None] = None,
-    ) -> None:
-        """Defines a new command line option.
-
-        ``type`` can be any of `str`, `int`, `float`, `bool`,
-        `~datetime.datetime`, or `~datetime.timedelta`. If no ``type``
-        is given but a ``default`` is, ``type`` is the type of
-        ``default``. Otherwise, ``type`` defaults to `str`.
-
-        If ``multiple`` is True, the option value is a list of ``type``
-        instead of an instance of ``type``.
-
-        ``help`` and ``metavar`` are used to construct the
-        automatically generated command line help string. The help
-        message is formatted like::
-
-           --name=METAVAR      help string
-
-        ``group`` is used to group the defined options in logical
-        groups. By default, command line options are grouped by the
-        file in which they are defined.
-
-        Command line option names must be unique globally.
-
-        If a ``callback`` is given, it will be run with the new value whenever
-        the option is changed.  This can be used to combine command-line
-        and file-based options::
-
-            define("config", type=str, help="path to config file",
-                   callback=lambda path: parse_config_file(path, final=False))
-
-        With this definition, options in the file specified by ``--config`` will
-        override options set earlier on the command line, but can be overridden
-        by later flags.
-
-        """
-        normalized = self._normalize_name(name)
-        if normalized in self._options:
-            raise Error(
-                "Option %r already defined in %s"
-                % (normalized, self._options[normalized].file_name)
-            )
-        frame = sys._getframe(0)
-        options_file = frame.f_code.co_filename
-
-        # Can be called directly, or through top level define() fn, in which
-        # case, step up above that frame to look for real caller.
-        if (
-            frame.f_back.f_code.co_filename == options_file
-            and frame.f_back.f_code.co_name == "define"
-        ):
-            frame = frame.f_back
-
-        file_name = frame.f_back.f_code.co_filename
-        if file_name == options_file:
-            file_name = ""
-        if type is None:
-            if not multiple and default is not None:
-                type = default.__class__
-            else:
-                type = str
-        if group:
-            group_name = group  # type: Optional[str]
-        else:
-            group_name = file_name
-        option = _Option(
-            name,
-            file_name=file_name,
-            default=default,
-            type=type,
-            help=help,
-            metavar=metavar,
-            multiple=multiple,
-            group_name=group_name,
-            callback=callback,
-        )
-        self._options[normalized] = option
-
-    def parse_command_line(
-        self, args: List[str] = None, final: bool = True
-    ) -> List[str]:
-        """Parses all options given on the command line (defaults to
-        `sys.argv`).
-
-        Options look like ``--option=value`` and are parsed according
-        to their ``type``. For boolean options, ``--option`` is
-        equivalent to ``--option=true``
-
-        If the option has ``multiple=True``, comma-separated values
-        are accepted. For multi-value integer options, the syntax
-        ``x:y`` is also accepted and equivalent to ``range(x, y)``.
-
-        Note that ``args[0]`` is ignored since it is the program name
-        in `sys.argv`.
-
-        We return a list of all arguments that are not parsed as options.
-
-        If ``final`` is ``False``, parse callbacks will not be run.
-        This is useful for applications that wish to combine configurations
-        from multiple sources.
-
-        """
-        if args is None:
-            args = sys.argv
-        remaining = []  # type: List[str]
-        for i in range(1, len(args)):
-            # All things after the last option are command line arguments
-            if not args[i].startswith("-"):
-                remaining = args[i:]
-                break
-            if args[i] == "--":
-                remaining = args[i + 1 :]
-                break
-            arg = args[i].lstrip("-")
-            name, equals, value = arg.partition("=")
-            name = self._normalize_name(name)
-            if name not in self._options:
-                self.print_help()
-                raise Error("Unrecognized command line option: %r" % name)
-            option = self._options[name]
-            if not equals:
-                if option.type == bool:
-                    value = "true"
-                else:
-                    raise Error("Option %r requires a value" % name)
-            option.parse(value)
-
-        if final:
-            self.run_parse_callbacks()
-
-        return remaining
-
-    def parse_config_file(self, path: str, final: bool = True) -> None:
-        """Parses and loads the config file at the given path.
-
-        The config file contains Python code that will be executed (so
-        it is **not safe** to use untrusted config files). Anything in
-        the global namespace that matches a defined option will be
-        used to set that option's value.
-
-        Options may either be the specified type for the option or
-        strings (in which case they will be parsed the same way as in
-        `.parse_command_line`)
-
-        Example (using the options defined in the top-level docs of
-        this module)::
-
-            port = 80
-            mysql_host = 'mydb.example.com:3306'
-            # Both lists and comma-separated strings are allowed for
-            # multiple=True.
-            memcache_hosts = ['cache1.example.com:11011',
-                              'cache2.example.com:11011']
-            memcache_hosts = 'cache1.example.com:11011,cache2.example.com:11011'
-
-        If ``final`` is ``False``, parse callbacks will not be run.
-        This is useful for applications that wish to combine configurations
-        from multiple sources.
-
-        .. note::
-
-            `tornado.options` is primarily a command-line library.
-            Config file support is provided for applications that wish
-            to use it, but applications that prefer config files may
-            wish to look at other libraries instead.
-
-        .. versionchanged:: 4.1
-           Config files are now always interpreted as utf-8 instead of
-           the system default encoding.
-
-        .. versionchanged:: 4.4
-           The special variable ``__file__`` is available inside config
-           files, specifying the absolute path to the config file itself.
-
-        .. versionchanged:: 5.1
-           Added the ability to set options via strings in config files.
-
-        """
-        config = {"__file__": os.path.abspath(path)}
-        with open(path, "rb") as f:
-            exec_in(native_str(f.read()), config, config)
-        for name in config:
-            normalized = self._normalize_name(name)
-            if normalized in self._options:
-                option = self._options[normalized]
-                if option.multiple:
-                    if not isinstance(config[name], (list, str)):
-                        raise Error(
-                            "Option %r is required to be a list of %s "
-                            "or a comma-separated string"
-                            % (option.name, option.type.__name__)
-                        )
-
-                if type(config[name]) == str and option.type != str:
-                    option.parse(config[name])
-                else:
-                    option.set(config[name])
-
-        if final:
-            self.run_parse_callbacks()
-
-    def print_help(self, file: TextIO = None) -> None:
-        """Prints all the command line options to stderr (or another file)."""
-        if file is None:
-            file = sys.stderr
-        print("Usage: %s [OPTIONS]" % sys.argv[0], file=file)
-        print("\nOptions:\n", file=file)
-        by_group = {}  # type: Dict[str, List[_Option]]
-        for option in self._options.values():
-            by_group.setdefault(option.group_name, []).append(option)
-
-        for filename, o in sorted(by_group.items()):
-            if filename:
-                print("\n%s options:\n" % os.path.normpath(filename), file=file)
-            o.sort(key=lambda option: option.name)
-            for option in o:
-                # Always print names with dashes in a CLI context.
-                prefix = self._normalize_name(option.name)
-                if option.metavar:
-                    prefix += "=" + option.metavar
-                description = option.help or ""
-                if option.default is not None and option.default != "":
-                    description += " (default %s)" % option.default
-                lines = textwrap.wrap(description, 79 - 35)
-                if len(prefix) > 30 or len(lines) == 0:
-                    lines.insert(0, "")
-                print("  --%-30s %s" % (prefix, lines[0]), file=file)
-                for line in lines[1:]:
-                    print("%-34s %s" % (" ", line), file=file)
-        print(file=file)
-
-    def _help_callback(self, value: bool) -> None:
-        if value:
-            self.print_help()
-            sys.exit(0)
-
-    def add_parse_callback(self, callback: Callable[[], None]) -> None:
-        """Adds a parse callback, to be invoked when option parsing is done."""
-        self._parse_callbacks.append(callback)
-
-    def run_parse_callbacks(self) -> None:
-        for callback in self._parse_callbacks:
-            callback()
-
-    def mockable(self) -> "_Mockable":
-        """Returns a wrapper around self that is compatible with
-        `mock.patch <unittest.mock.patch>`.
-
-        The `mock.patch <unittest.mock.patch>` function (included in
-        the standard library `unittest.mock` package since Python 3.3,
-        or in the third-party ``mock`` package for older versions of
-        Python) is incompatible with objects like ``options`` that
-        override ``__getattr__`` and ``__setattr__``.  This function
-        returns an object that can be used with `mock.patch.object
-        <unittest.mock.patch.object>` to modify option values::
-
-            with mock.patch.object(options.mockable(), 'name', value):
-                assert options.name == value
-        """
-        return _Mockable(self)
-
-
-class _Mockable(object):
-    """`mock.patch` compatible wrapper for `OptionParser`.
-
-    As of ``mock`` version 1.0.1, when an object uses ``__getattr__``
-    hooks instead of ``__dict__``, ``patch.__exit__`` tries to delete
-    the attribute it set instead of setting a new one (assuming that
-    the object does not catpure ``__setattr__``, so the patch
-    created a new attribute in ``__dict__``).
-
-    _Mockable's getattr and setattr pass through to the underlying
-    OptionParser, and delattr undoes the effect of a previous setattr.
-    """
-
-    def __init__(self, options: OptionParser) -> None:
-        # Modify __dict__ directly to bypass __setattr__
-        self.__dict__["_options"] = options
-        self.__dict__["_originals"] = {}
-
-    def __getattr__(self, name: str) -> Any:
-        return getattr(self._options, name)
-
-    def __setattr__(self, name: str, value: Any) -> None:
-        assert name not in self._originals, "don't reuse mockable objects"
-        self._originals[name] = getattr(self._options, name)
-        setattr(self._options, name, value)
-
-    def __delattr__(self, name: str) -> None:
-        setattr(self._options, name, self._originals.pop(name))
-
-
-class _Option(object):
-    # This class could almost be made generic, but the way the types
-    # interact with the multiple argument makes this tricky. (default
-    # and the callback use List[T], but type is still Type[T]).
-    UNSET = object()
-
-    def __init__(
-        self,
-        name: str,
-        default: Any = None,
-        type: type = None,
-        help: str = None,
-        metavar: str = None,
-        multiple: bool = False,
-        file_name: str = None,
-        group_name: str = None,
-        callback: Callable[[Any], None] = None,
-    ) -> None:
-        if default is None and multiple:
-            default = []
-        self.name = name
-        if type is None:
-            raise ValueError("type must not be None")
-        self.type = type
-        self.help = help
-        self.metavar = metavar
-        self.multiple = multiple
-        self.file_name = file_name
-        self.group_name = group_name
-        self.callback = callback
-        self.default = default
-        self._value = _Option.UNSET  # type: Any
-
-    def value(self) -> Any:
-        return self.default if self._value is _Option.UNSET else self._value
-
-    def parse(self, value: str) -> Any:
-        _parse = {
-            datetime.datetime: self._parse_datetime,
-            datetime.timedelta: self._parse_timedelta,
-            bool: self._parse_bool,
-            basestring_type: self._parse_string,
-        }.get(
-            self.type, self.type
-        )  # type: Callable[[str], Any]
-        if self.multiple:
-            self._value = []
-            for part in value.split(","):
-                if issubclass(self.type, numbers.Integral):
-                    # allow ranges of the form X:Y (inclusive at both ends)
-                    lo_str, _, hi_str = part.partition(":")
-                    lo = _parse(lo_str)
-                    hi = _parse(hi_str) if hi_str else lo
-                    self._value.extend(range(lo, hi + 1))
-                else:
-                    self._value.append(_parse(part))
-        else:
-            self._value = _parse(value)
-        if self.callback is not None:
-            self.callback(self._value)
-        return self.value()
-
-    def set(self, value: Any) -> None:
-        if self.multiple:
-            if not isinstance(value, list):
-                raise Error(
-                    "Option %r is required to be a list of %s"
-                    % (self.name, self.type.__name__)
-                )
-            for item in value:
-                if item is not None and not isinstance(item, self.type):
-                    raise Error(
-                        "Option %r is required to be a list of %s"
-                        % (self.name, self.type.__name__)
-                    )
-        else:
-            if value is not None and not isinstance(value, self.type):
-                raise Error(
-                    "Option %r is required to be a %s (%s given)"
-                    % (self.name, self.type.__name__, type(value))
-                )
-        self._value = value
-        if self.callback is not None:
-            self.callback(self._value)
-
-    # Supported date/time formats in our options
-    _DATETIME_FORMATS = [
-        "%a %b %d %H:%M:%S %Y",
-        "%Y-%m-%d %H:%M:%S",
-        "%Y-%m-%d %H:%M",
-        "%Y-%m-%dT%H:%M",
-        "%Y%m%d %H:%M:%S",
-        "%Y%m%d %H:%M",
-        "%Y-%m-%d",
-        "%Y%m%d",
-        "%H:%M:%S",
-        "%H:%M",
-    ]
-
-    def _parse_datetime(self, value: str) -> datetime.datetime:
-        for format in self._DATETIME_FORMATS:
-            try:
-                return datetime.datetime.strptime(value, format)
-            except ValueError:
-                pass
-        raise Error("Unrecognized date/time format: %r" % value)
-
-    _TIMEDELTA_ABBREV_DICT = {
-        "h": "hours",
-        "m": "minutes",
-        "min": "minutes",
-        "s": "seconds",
-        "sec": "seconds",
-        "ms": "milliseconds",
-        "us": "microseconds",
-        "d": "days",
-        "w": "weeks",
-    }
-
-    _FLOAT_PATTERN = r"[-+]?(?:\d+(?:\.\d*)?|\.\d+)(?:[eE][-+]?\d+)?"
-
-    _TIMEDELTA_PATTERN = re.compile(
-        r"\s*(%s)\s*(\w*)\s*" % _FLOAT_PATTERN, re.IGNORECASE
-    )
-
-    def _parse_timedelta(self, value: str) -> datetime.timedelta:
-        try:
-            sum = datetime.timedelta()
-            start = 0
-            while start < len(value):
-                m = self._TIMEDELTA_PATTERN.match(value, start)
-                if not m:
-                    raise Exception()
-                num = float(m.group(1))
-                units = m.group(2) or "seconds"
-                units = self._TIMEDELTA_ABBREV_DICT.get(units, units)
-                sum += datetime.timedelta(**{units: num})
-                start = m.end()
-            return sum
-        except Exception:
-            raise
-
-    def _parse_bool(self, value: str) -> bool:
-        return value.lower() not in ("false", "0", "f")
-
-    def _parse_string(self, value: str) -> str:
-        return _unicode(value)
-
-
-options = OptionParser()
-"""Global options object.
-
-All defined options are available as attributes on this object.
-"""
-
-
-def define(
-    name: str,
-    default: Any = None,
-    type: type = None,
-    help: str = None,
-    metavar: str = None,
-    multiple: bool = False,
-    group: str = None,
-    callback: Callable[[Any], None] = None,
-) -> None:
-    """Defines an option in the global namespace.
-
-    See `OptionParser.define`.
-    """
-    return options.define(
-        name,
-        default=default,
-        type=type,
-        help=help,
-        metavar=metavar,
-        multiple=multiple,
-        group=group,
-        callback=callback,
-    )
-
-
-def parse_command_line(args: List[str] = None, final: bool = True) -> List[str]:
-    """Parses global options from the command line.
-
-    See `OptionParser.parse_command_line`.
-    """
-    return options.parse_command_line(args, final=final)
-
-
-def parse_config_file(path: str, final: bool = True) -> None:
-    """Parses global options from a config file.
-
-    See `OptionParser.parse_config_file`.
-    """
-    return options.parse_config_file(path, final=final)
-
-
-def print_help(file: TextIO = None) -> None:
-    """Prints all the command line options to stderr (or another file).
-
-    See `OptionParser.print_help`.
-    """
-    return options.print_help(file)
-
-
-def add_parse_callback(callback: Callable[[], None]) -> None:
-    """Adds a parse callback, to be invoked when option parsing is done.
-
-    See `OptionParser.add_parse_callback`
-    """
-    options.add_parse_callback(callback)
-
-
-# Default options
-define_logging_options(options)
diff --git a/venv/lib/python3.7/site-packages/tornado/platform/__init__.py b/venv/lib/python3.7/site-packages/tornado/platform/__init__.py
deleted file mode 100644
index e69de29..0000000
diff --git a/venv/lib/python3.7/site-packages/tornado/platform/asyncio.py b/venv/lib/python3.7/site-packages/tornado/platform/asyncio.py
deleted file mode 100644
index 0b79f82..0000000
--- a/venv/lib/python3.7/site-packages/tornado/platform/asyncio.py
+++ /dev/null
@@ -1,337 +0,0 @@
-"""Bridges between the `asyncio` module and Tornado IOLoop.
-
-.. versionadded:: 3.2
-
-This module integrates Tornado with the ``asyncio`` module introduced
-in Python 3.4. This makes it possible to combine the two libraries on
-the same event loop.
-
-.. deprecated:: 5.0
-
-   While the code in this module is still used, it is now enabled
-   automatically when `asyncio` is available, so applications should
-   no longer need to refer to this module directly.
-
-.. note::
-
-   Tornado requires the `~asyncio.AbstractEventLoop.add_reader` family of
-   methods, so it is not compatible with the `~asyncio.ProactorEventLoop` on
-   Windows. Use the `~asyncio.SelectorEventLoop` instead.
-"""
-
-import concurrent.futures
-import functools
-
-from threading import get_ident
-from tornado.gen import convert_yielded
-from tornado.ioloop import IOLoop, _Selectable
-
-import asyncio
-
-import typing
-from typing import Any, TypeVar, Awaitable, Callable, Union, Optional
-
-if typing.TYPE_CHECKING:
-    from typing import Set, Dict, Tuple  # noqa: F401
-
-_T = TypeVar("_T")
-
-
-class BaseAsyncIOLoop(IOLoop):
-    def initialize(  # type: ignore
-        self, asyncio_loop: asyncio.AbstractEventLoop, **kwargs: Any
-    ) -> None:
-        self.asyncio_loop = asyncio_loop
-        # Maps fd to (fileobj, handler function) pair (as in IOLoop.add_handler)
-        self.handlers = {}  # type: Dict[int, Tuple[Union[int, _Selectable], Callable]]
-        # Set of fds listening for reads/writes
-        self.readers = set()  # type: Set[int]
-        self.writers = set()  # type: Set[int]
-        self.closing = False
-        # If an asyncio loop was closed through an asyncio interface
-        # instead of IOLoop.close(), we'd never hear about it and may
-        # have left a dangling reference in our map. In case an
-        # application (or, more likely, a test suite) creates and
-        # destroys a lot of event loops in this way, check here to
-        # ensure that we don't have a lot of dead loops building up in
-        # the map.
-        #
-        # TODO(bdarnell): consider making self.asyncio_loop a weakref
-        # for AsyncIOMainLoop and make _ioloop_for_asyncio a
-        # WeakKeyDictionary.
-        for loop in list(IOLoop._ioloop_for_asyncio):
-            if loop.is_closed():
-                del IOLoop._ioloop_for_asyncio[loop]
-        IOLoop._ioloop_for_asyncio[asyncio_loop] = self
-
-        self._thread_identity = 0
-
-        super(BaseAsyncIOLoop, self).initialize(**kwargs)
-
-        def assign_thread_identity() -> None:
-            self._thread_identity = get_ident()
-
-        self.add_callback(assign_thread_identity)
-
-    def close(self, all_fds: bool = False) -> None:
-        self.closing = True
-        for fd in list(self.handlers):
-            fileobj, handler_func = self.handlers[fd]
-            self.remove_handler(fd)
-            if all_fds:
-                self.close_fd(fileobj)
-        # Remove the mapping before closing the asyncio loop. If this
-        # happened in the other order, we could race against another
-        # initialize() call which would see the closed asyncio loop,
-        # assume it was closed from the asyncio side, and do this
-        # cleanup for us, leading to a KeyError.
-        del IOLoop._ioloop_for_asyncio[self.asyncio_loop]
-        self.asyncio_loop.close()
-
-    def add_handler(
-        self, fd: Union[int, _Selectable], handler: Callable[..., None], events: int
-    ) -> None:
-        fd, fileobj = self.split_fd(fd)
-        if fd in self.handlers:
-            raise ValueError("fd %s added twice" % fd)
-        self.handlers[fd] = (fileobj, handler)
-        if events & IOLoop.READ:
-            self.asyncio_loop.add_reader(fd, self._handle_events, fd, IOLoop.READ)
-            self.readers.add(fd)
-        if events & IOLoop.WRITE:
-            self.asyncio_loop.add_writer(fd, self._handle_events, fd, IOLoop.WRITE)
-            self.writers.add(fd)
-
-    def update_handler(self, fd: Union[int, _Selectable], events: int) -> None:
-        fd, fileobj = self.split_fd(fd)
-        if events & IOLoop.READ:
-            if fd not in self.readers:
-                self.asyncio_loop.add_reader(fd, self._handle_events, fd, IOLoop.READ)
-                self.readers.add(fd)
-        else:
-            if fd in self.readers:
-                self.asyncio_loop.remove_reader(fd)
-                self.readers.remove(fd)
-        if events & IOLoop.WRITE:
-            if fd not in self.writers:
-                self.asyncio_loop.add_writer(fd, self._handle_events, fd, IOLoop.WRITE)
-                self.writers.add(fd)
-        else:
-            if fd in self.writers:
-                self.asyncio_loop.remove_writer(fd)
-                self.writers.remove(fd)
-
-    def remove_handler(self, fd: Union[int, _Selectable]) -> None:
-        fd, fileobj = self.split_fd(fd)
-        if fd not in self.handlers:
-            return
-        if fd in self.readers:
-            self.asyncio_loop.remove_reader(fd)
-            self.readers.remove(fd)
-        if fd in self.writers:
-            self.asyncio_loop.remove_writer(fd)
-            self.writers.remove(fd)
-        del self.handlers[fd]
-
-    def _handle_events(self, fd: int, events: int) -> None:
-        fileobj, handler_func = self.handlers[fd]
-        handler_func(fileobj, events)
-
-    def start(self) -> None:
-        try:
-            old_loop = asyncio.get_event_loop()
-        except (RuntimeError, AssertionError):
-            old_loop = None  # type: ignore
-        try:
-            self._setup_logging()
-            asyncio.set_event_loop(self.asyncio_loop)
-            self.asyncio_loop.run_forever()
-        finally:
-            asyncio.set_event_loop(old_loop)
-
-    def stop(self) -> None:
-        self.asyncio_loop.stop()
-
-    def call_at(
-        self, when: float, callback: Callable[..., None], *args: Any, **kwargs: Any
-    ) -> object:
-        # asyncio.call_at supports *args but not **kwargs, so bind them here.
-        # We do not synchronize self.time and asyncio_loop.time, so
-        # convert from absolute to relative.
-        return self.asyncio_loop.call_later(
-            max(0, when - self.time()),
-            self._run_callback,
-            functools.partial(callback, *args, **kwargs),
-        )
-
-    def remove_timeout(self, timeout: object) -> None:
-        timeout.cancel()  # type: ignore
-
-    def add_callback(self, callback: Callable, *args: Any, **kwargs: Any) -> None:
-        if get_ident() == self._thread_identity:
-            call_soon = self.asyncio_loop.call_soon
-        else:
-            call_soon = self.asyncio_loop.call_soon_threadsafe
-        try:
-            call_soon(self._run_callback, functools.partial(callback, *args, **kwargs))
-        except RuntimeError:
-            # "Event loop is closed". Swallow the exception for
-            # consistency with PollIOLoop (and logical consistency
-            # with the fact that we can't guarantee that an
-            # add_callback that completes without error will
-            # eventually execute).
-            pass
-
-    def add_callback_from_signal(
-        self, callback: Callable, *args: Any, **kwargs: Any
-    ) -> None:
-        try:
-            self.asyncio_loop.call_soon_threadsafe(
-                self._run_callback, functools.partial(callback, *args, **kwargs)
-            )
-        except RuntimeError:
-            pass
-
-    def run_in_executor(
-        self,
-        executor: Optional[concurrent.futures.Executor],
-        func: Callable[..., _T],
-        *args: Any
-    ) -> Awaitable[_T]:
-        return self.asyncio_loop.run_in_executor(executor, func, *args)
-
-    def set_default_executor(self, executor: concurrent.futures.Executor) -> None:
-        return self.asyncio_loop.set_default_executor(executor)
-
-
-class AsyncIOMainLoop(BaseAsyncIOLoop):
-    """``AsyncIOMainLoop`` creates an `.IOLoop` that corresponds to the
-    current ``asyncio`` event loop (i.e. the one returned by
-    ``asyncio.get_event_loop()``).
-
-    .. deprecated:: 5.0
-
-       Now used automatically when appropriate; it is no longer necessary
-       to refer to this class directly.
-
-    .. versionchanged:: 5.0
-
-       Closing an `AsyncIOMainLoop` now closes the underlying asyncio loop.
-    """
-
-    def initialize(self, **kwargs: Any) -> None:  # type: ignore
-        super(AsyncIOMainLoop, self).initialize(asyncio.get_event_loop(), **kwargs)
-
-    def make_current(self) -> None:
-        # AsyncIOMainLoop already refers to the current asyncio loop so
-        # nothing to do here.
-        pass
-
-
-class AsyncIOLoop(BaseAsyncIOLoop):
-    """``AsyncIOLoop`` is an `.IOLoop` that runs on an ``asyncio`` event loop.
-    This class follows the usual Tornado semantics for creating new
-    ``IOLoops``; these loops are not necessarily related to the
-    ``asyncio`` default event loop.
-
-    Each ``AsyncIOLoop`` creates a new ``asyncio.EventLoop``; this object
-    can be accessed with the ``asyncio_loop`` attribute.
-
-    .. versionchanged:: 5.0
-
-       When an ``AsyncIOLoop`` becomes the current `.IOLoop`, it also sets
-       the current `asyncio` event loop.
-
-    .. deprecated:: 5.0
-
-       Now used automatically when appropriate; it is no longer necessary
-       to refer to this class directly.
-    """
-
-    def initialize(self, **kwargs: Any) -> None:  # type: ignore
-        self.is_current = False
-        loop = asyncio.new_event_loop()
-        try:
-            super(AsyncIOLoop, self).initialize(loop, **kwargs)
-        except Exception:
-            # If initialize() does not succeed (taking ownership of the loop),
-            # we have to close it.
-            loop.close()
-            raise
-
-    def close(self, all_fds: bool = False) -> None:
-        if self.is_current:
-            self.clear_current()
-        super(AsyncIOLoop, self).close(all_fds=all_fds)
-
-    def make_current(self) -> None:
-        if not self.is_current:
-            try:
-                self.old_asyncio = asyncio.get_event_loop()
-            except (RuntimeError, AssertionError):
-                self.old_asyncio = None  # type: ignore
-            self.is_current = True
-        asyncio.set_event_loop(self.asyncio_loop)
-
-    def _clear_current_hook(self) -> None:
-        if self.is_current:
-            asyncio.set_event_loop(self.old_asyncio)
-            self.is_current = False
-
-
-def to_tornado_future(asyncio_future: asyncio.Future) -> asyncio.Future:
-    """Convert an `asyncio.Future` to a `tornado.concurrent.Future`.
-
-    .. versionadded:: 4.1
-
-    .. deprecated:: 5.0
-       Tornado ``Futures`` have been merged with `asyncio.Future`,
-       so this method is now a no-op.
-    """
-    return asyncio_future
-
-
-def to_asyncio_future(tornado_future: asyncio.Future) -> asyncio.Future:
-    """Convert a Tornado yieldable object to an `asyncio.Future`.
-
-    .. versionadded:: 4.1
-
-    .. versionchanged:: 4.3
-       Now accepts any yieldable object, not just
-       `tornado.concurrent.Future`.
-
-    .. deprecated:: 5.0
-       Tornado ``Futures`` have been merged with `asyncio.Future`,
-       so this method is now equivalent to `tornado.gen.convert_yielded`.
-    """
-    return convert_yielded(tornado_future)
-
-
-class AnyThreadEventLoopPolicy(asyncio.DefaultEventLoopPolicy):  # type: ignore
-    """Event loop policy that allows loop creation on any thread.
-
-    The default `asyncio` event loop policy only automatically creates
-    event loops in the main threads. Other threads must create event
-    loops explicitly or `asyncio.get_event_loop` (and therefore
-    `.IOLoop.current`) will fail. Installing this policy allows event
-    loops to be created automatically on any thread, matching the
-    behavior of Tornado versions prior to 5.0 (or 5.0 on Python 2).
-
-    Usage::
-
-        asyncio.set_event_loop_policy(AnyThreadEventLoopPolicy())
-
-    .. versionadded:: 5.0
-
-    """
-
-    def get_event_loop(self) -> asyncio.AbstractEventLoop:
-        try:
-            return super().get_event_loop()
-        except (RuntimeError, AssertionError):
-            # This was an AssertionError in python 3.4.2 (which ships with debian jessie)
-            # and changed to a RuntimeError in 3.4.3.
-            # "There is no current event loop in thread %r"
-            loop = self.new_event_loop()
-            self.set_event_loop(loop)
-            return loop
diff --git a/venv/lib/python3.7/site-packages/tornado/platform/auto.py b/venv/lib/python3.7/site-packages/tornado/platform/auto.py
deleted file mode 100644
index 4f1b6ac..0000000
--- a/venv/lib/python3.7/site-packages/tornado/platform/auto.py
+++ /dev/null
@@ -1,32 +0,0 @@
-#
-# Copyright 2011 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-"""Implementation of platform-specific functionality.
-
-For each function or class described in `tornado.platform.interface`,
-the appropriate platform-specific implementation exists in this module.
-Most code that needs access to this functionality should do e.g.::
-
-    from tornado.platform.auto import set_close_exec
-"""
-
-import os
-
-if os.name == "nt":
-    from tornado.platform.windows import set_close_exec
-else:
-    from tornado.platform.posix import set_close_exec
-
-__all__ = ["set_close_exec"]
diff --git a/venv/lib/python3.7/site-packages/tornado/platform/caresresolver.py b/venv/lib/python3.7/site-packages/tornado/platform/caresresolver.py
deleted file mode 100644
index e2c5009..0000000
--- a/venv/lib/python3.7/site-packages/tornado/platform/caresresolver.py
+++ /dev/null
@@ -1,89 +0,0 @@
-import pycares  # type: ignore
-import socket
-
-from tornado.concurrent import Future
-from tornado import gen
-from tornado.ioloop import IOLoop
-from tornado.netutil import Resolver, is_valid_ip
-
-import typing
-
-if typing.TYPE_CHECKING:
-    from typing import Generator, Any, List, Tuple, Dict  # noqa: F401
-
-
-class CaresResolver(Resolver):
-    """Name resolver based on the c-ares library.
-
-    This is a non-blocking and non-threaded resolver.  It may not produce
-    the same results as the system resolver, but can be used for non-blocking
-    resolution when threads cannot be used.
-
-    c-ares fails to resolve some names when ``family`` is ``AF_UNSPEC``,
-    so it is only recommended for use in ``AF_INET`` (i.e. IPv4).  This is
-    the default for ``tornado.simple_httpclient``, but other libraries
-    may default to ``AF_UNSPEC``.
-
-    .. versionchanged:: 5.0
-       The ``io_loop`` argument (deprecated since version 4.1) has been removed.
-    """
-
-    def initialize(self) -> None:
-        self.io_loop = IOLoop.current()
-        self.channel = pycares.Channel(sock_state_cb=self._sock_state_cb)
-        self.fds = {}  # type: Dict[int, int]
-
-    def _sock_state_cb(self, fd: int, readable: bool, writable: bool) -> None:
-        state = (IOLoop.READ if readable else 0) | (IOLoop.WRITE if writable else 0)
-        if not state:
-            self.io_loop.remove_handler(fd)
-            del self.fds[fd]
-        elif fd in self.fds:
-            self.io_loop.update_handler(fd, state)
-            self.fds[fd] = state
-        else:
-            self.io_loop.add_handler(fd, self._handle_events, state)
-            self.fds[fd] = state
-
-    def _handle_events(self, fd: int, events: int) -> None:
-        read_fd = pycares.ARES_SOCKET_BAD
-        write_fd = pycares.ARES_SOCKET_BAD
-        if events & IOLoop.READ:
-            read_fd = fd
-        if events & IOLoop.WRITE:
-            write_fd = fd
-        self.channel.process_fd(read_fd, write_fd)
-
-    @gen.coroutine
-    def resolve(
-        self, host: str, port: int, family: int = 0
-    ) -> "Generator[Any, Any, List[Tuple[int, Any]]]":
-        if is_valid_ip(host):
-            addresses = [host]
-        else:
-            # gethostbyname doesn't take callback as a kwarg
-            fut = Future()  # type: Future[Tuple[Any, Any]]
-            self.channel.gethostbyname(
-                host, family, lambda result, error: fut.set_result((result, error))
-            )
-            result, error = yield fut
-            if error:
-                raise IOError(
-                    "C-Ares returned error %s: %s while resolving %s"
-                    % (error, pycares.errno.strerror(error), host)
-                )
-            addresses = result.addresses
-        addrinfo = []
-        for address in addresses:
-            if "." in address:
-                address_family = socket.AF_INET
-            elif ":" in address:
-                address_family = socket.AF_INET6
-            else:
-                address_family = socket.AF_UNSPEC
-            if family != socket.AF_UNSPEC and family != address_family:
-                raise IOError(
-                    "Requested socket family %d but got %d" % (family, address_family)
-                )
-            addrinfo.append((typing.cast(int, address_family), (address, port)))
-        return addrinfo
diff --git a/venv/lib/python3.7/site-packages/tornado/platform/interface.py b/venv/lib/python3.7/site-packages/tornado/platform/interface.py
deleted file mode 100644
index 11afdb1..0000000
--- a/venv/lib/python3.7/site-packages/tornado/platform/interface.py
+++ /dev/null
@@ -1,26 +0,0 @@
-#
-# Copyright 2011 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-"""Interfaces for platform-specific functionality.
-
-This module exists primarily for documentation purposes and as base classes
-for other tornado.platform modules.  Most code should import the appropriate
-implementation from `tornado.platform.auto`.
-"""
-
-
-def set_close_exec(fd: int) -> None:
-    """Sets the close-on-exec bit (``FD_CLOEXEC``)for a file descriptor."""
-    raise NotImplementedError()
diff --git a/venv/lib/python3.7/site-packages/tornado/platform/posix.py b/venv/lib/python3.7/site-packages/tornado/platform/posix.py
deleted file mode 100644
index 0ab27ca..0000000
--- a/venv/lib/python3.7/site-packages/tornado/platform/posix.py
+++ /dev/null
@@ -1,29 +0,0 @@
-#
-# Copyright 2011 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-"""Posix implementations of platform-specific functionality."""
-
-import fcntl
-import os
-
-
-def set_close_exec(fd: int) -> None:
-    flags = fcntl.fcntl(fd, fcntl.F_GETFD)
-    fcntl.fcntl(fd, fcntl.F_SETFD, flags | fcntl.FD_CLOEXEC)
-
-
-def _set_nonblocking(fd: int) -> None:
-    flags = fcntl.fcntl(fd, fcntl.F_GETFL)
-    fcntl.fcntl(fd, fcntl.F_SETFL, flags | os.O_NONBLOCK)
diff --git a/venv/lib/python3.7/site-packages/tornado/platform/twisted.py b/venv/lib/python3.7/site-packages/tornado/platform/twisted.py
deleted file mode 100644
index 3881631..0000000
--- a/venv/lib/python3.7/site-packages/tornado/platform/twisted.py
+++ /dev/null
@@ -1,131 +0,0 @@
-# Author: Ovidiu Predescu
-# Date: July 2011
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-"""Bridges between the Twisted reactor and Tornado IOLoop.
-
-This module lets you run applications and libraries written for
-Twisted in a Tornado application.  It can be used in two modes,
-depending on which library's underlying event loop you want to use.
-
-This module has been tested with Twisted versions 11.0.0 and newer.
-"""
-
-import socket
-import sys
-
-import twisted.internet.abstract  # type: ignore
-import twisted.internet.asyncioreactor  # type: ignore
-from twisted.internet.defer import Deferred  # type: ignore
-from twisted.python import failure  # type: ignore
-import twisted.names.cache  # type: ignore
-import twisted.names.client  # type: ignore
-import twisted.names.hosts  # type: ignore
-import twisted.names.resolve  # type: ignore
-
-
-from tornado.concurrent import Future, future_set_exc_info
-from tornado.escape import utf8
-from tornado import gen
-from tornado.netutil import Resolver
-
-import typing
-
-if typing.TYPE_CHECKING:
-    from typing import Generator, Any, List, Tuple  # noqa: F401
-
-
-class TwistedResolver(Resolver):
-    """Twisted-based asynchronous resolver.
-
-    This is a non-blocking and non-threaded resolver.  It is
-    recommended only when threads cannot be used, since it has
-    limitations compared to the standard ``getaddrinfo``-based
-    `~tornado.netutil.Resolver` and
-    `~tornado.netutil.DefaultExecutorResolver`.  Specifically, it returns at
-    most one result, and arguments other than ``host`` and ``family``
-    are ignored.  It may fail to resolve when ``family`` is not
-    ``socket.AF_UNSPEC``.
-
-    Requires Twisted 12.1 or newer.
-
-    .. versionchanged:: 5.0
-       The ``io_loop`` argument (deprecated since version 4.1) has been removed.
-    """
-
-    def initialize(self) -> None:
-        # partial copy of twisted.names.client.createResolver, which doesn't
-        # allow for a reactor to be passed in.
-        self.reactor = twisted.internet.asyncioreactor.AsyncioSelectorReactor()
-
-        host_resolver = twisted.names.hosts.Resolver("/etc/hosts")
-        cache_resolver = twisted.names.cache.CacheResolver(reactor=self.reactor)
-        real_resolver = twisted.names.client.Resolver(
-            "/etc/resolv.conf", reactor=self.reactor
-        )
-        self.resolver = twisted.names.resolve.ResolverChain(
-            [host_resolver, cache_resolver, real_resolver]
-        )
-
-    @gen.coroutine
-    def resolve(
-        self, host: str, port: int, family: int = 0
-    ) -> "Generator[Any, Any, List[Tuple[int, Any]]]":
-        # getHostByName doesn't accept IP addresses, so if the input
-        # looks like an IP address just return it immediately.
-        if twisted.internet.abstract.isIPAddress(host):
-            resolved = host
-            resolved_family = socket.AF_INET
-        elif twisted.internet.abstract.isIPv6Address(host):
-            resolved = host
-            resolved_family = socket.AF_INET6
-        else:
-            deferred = self.resolver.getHostByName(utf8(host))
-            fut = Future()  # type: Future[Any]
-            deferred.addBoth(fut.set_result)
-            resolved = yield fut
-            if isinstance(resolved, failure.Failure):
-                try:
-                    resolved.raiseException()
-                except twisted.names.error.DomainError as e:
-                    raise IOError(e)
-            elif twisted.internet.abstract.isIPAddress(resolved):
-                resolved_family = socket.AF_INET
-            elif twisted.internet.abstract.isIPv6Address(resolved):
-                resolved_family = socket.AF_INET6
-            else:
-                resolved_family = socket.AF_UNSPEC
-        if family != socket.AF_UNSPEC and family != resolved_family:
-            raise Exception(
-                "Requested socket family %d but got %d" % (family, resolved_family)
-            )
-        result = [(typing.cast(int, resolved_family), (resolved, port))]
-        return result
-
-
-if hasattr(gen.convert_yielded, "register"):
-
-    @gen.convert_yielded.register(Deferred)  # type: ignore
-    def _(d: Deferred) -> Future:
-        f = Future()  # type: Future[Any]
-
-        def errback(failure: failure.Failure) -> None:
-            try:
-                failure.raiseException()
-                # Should never happen, but just in case
-                raise Exception("errback called without error")
-            except:
-                future_set_exc_info(f, sys.exc_info())
-
-        d.addCallbacks(f.set_result, errback)
-        return f
diff --git a/venv/lib/python3.7/site-packages/tornado/platform/windows.py b/venv/lib/python3.7/site-packages/tornado/platform/windows.py
deleted file mode 100644
index ddbde20..0000000
--- a/venv/lib/python3.7/site-packages/tornado/platform/windows.py
+++ /dev/null
@@ -1,22 +0,0 @@
-# NOTE: win32 support is currently experimental, and not recommended
-# for production use.
-
-import ctypes
-import ctypes.wintypes
-
-# See: http://msdn.microsoft.com/en-us/library/ms724935(VS.85).aspx
-SetHandleInformation = ctypes.windll.kernel32.SetHandleInformation  # type: ignore
-SetHandleInformation.argtypes = (
-    ctypes.wintypes.HANDLE,
-    ctypes.wintypes.DWORD,
-    ctypes.wintypes.DWORD,
-)
-SetHandleInformation.restype = ctypes.wintypes.BOOL
-
-HANDLE_FLAG_INHERIT = 0x00000001
-
-
-def set_close_exec(fd: int) -> None:
-    success = SetHandleInformation(fd, HANDLE_FLAG_INHERIT, 0)
-    if not success:
-        raise ctypes.WinError()  # type: ignore
diff --git a/venv/lib/python3.7/site-packages/tornado/process.py b/venv/lib/python3.7/site-packages/tornado/process.py
deleted file mode 100644
index c1a5fce..0000000
--- a/venv/lib/python3.7/site-packages/tornado/process.py
+++ /dev/null
@@ -1,373 +0,0 @@
-#
-# Copyright 2011 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-"""Utilities for working with multiple processes, including both forking
-the server into multiple processes and managing subprocesses.
-"""
-
-import errno
-import os
-import multiprocessing
-import signal
-import subprocess
-import sys
-import time
-
-from binascii import hexlify
-
-from tornado.concurrent import (
-    Future,
-    future_set_result_unless_cancelled,
-    future_set_exception_unless_cancelled,
-)
-from tornado import ioloop
-from tornado.iostream import PipeIOStream
-from tornado.log import gen_log
-from tornado.platform.auto import set_close_exec
-from tornado.util import errno_from_exception
-
-import typing
-from typing import Tuple, Optional, Any, Callable
-
-if typing.TYPE_CHECKING:
-    from typing import List  # noqa: F401
-
-# Re-export this exception for convenience.
-CalledProcessError = subprocess.CalledProcessError
-
-
-def cpu_count() -> int:
-    """Returns the number of processors on this machine."""
-    if multiprocessing is None:
-        return 1
-    try:
-        return multiprocessing.cpu_count()
-    except NotImplementedError:
-        pass
-    try:
-        return os.sysconf("SC_NPROCESSORS_CONF")
-    except (AttributeError, ValueError):
-        pass
-    gen_log.error("Could not detect number of processors; assuming 1")
-    return 1
-
-
-def _reseed_random() -> None:
-    if "random" not in sys.modules:
-        return
-    import random
-
-    # If os.urandom is available, this method does the same thing as
-    # random.seed (at least as of python 2.6).  If os.urandom is not
-    # available, we mix in the pid in addition to a timestamp.
-    try:
-        seed = int(hexlify(os.urandom(16)), 16)
-    except NotImplementedError:
-        seed = int(time.time() * 1000) ^ os.getpid()
-    random.seed(seed)
-
-
-def _pipe_cloexec() -> Tuple[int, int]:
-    r, w = os.pipe()
-    set_close_exec(r)
-    set_close_exec(w)
-    return r, w
-
-
-_task_id = None
-
-
-def fork_processes(num_processes: Optional[int], max_restarts: int = None) -> int:
-    """Starts multiple worker processes.
-
-    If ``num_processes`` is None or <= 0, we detect the number of cores
-    available on this machine and fork that number of child
-    processes. If ``num_processes`` is given and > 0, we fork that
-    specific number of sub-processes.
-
-    Since we use processes and not threads, there is no shared memory
-    between any server code.
-
-    Note that multiple processes are not compatible with the autoreload
-    module (or the ``autoreload=True`` option to `tornado.web.Application`
-    which defaults to True when ``debug=True``).
-    When using multiple processes, no IOLoops can be created or
-    referenced until after the call to ``fork_processes``.
-
-    In each child process, ``fork_processes`` returns its *task id*, a
-    number between 0 and ``num_processes``.  Processes that exit
-    abnormally (due to a signal or non-zero exit status) are restarted
-    with the same id (up to ``max_restarts`` times).  In the parent
-    process, ``fork_processes`` returns None if all child processes
-    have exited normally, but will otherwise only exit by throwing an
-    exception.
-
-    max_restarts defaults to 100.
-    """
-    if max_restarts is None:
-        max_restarts = 100
-
-    global _task_id
-    assert _task_id is None
-    if num_processes is None or num_processes <= 0:
-        num_processes = cpu_count()
-    gen_log.info("Starting %d processes", num_processes)
-    children = {}
-
-    def start_child(i: int) -> Optional[int]:
-        pid = os.fork()
-        if pid == 0:
-            # child process
-            _reseed_random()
-            global _task_id
-            _task_id = i
-            return i
-        else:
-            children[pid] = i
-            return None
-
-    for i in range(num_processes):
-        id = start_child(i)
-        if id is not None:
-            return id
-    num_restarts = 0
-    while children:
-        try:
-            pid, status = os.wait()
-        except OSError as e:
-            if errno_from_exception(e) == errno.EINTR:
-                continue
-            raise
-        if pid not in children:
-            continue
-        id = children.pop(pid)
-        if os.WIFSIGNALED(status):
-            gen_log.warning(
-                "child %d (pid %d) killed by signal %d, restarting",
-                id,
-                pid,
-                os.WTERMSIG(status),
-            )
-        elif os.WEXITSTATUS(status) != 0:
-            gen_log.warning(
-                "child %d (pid %d) exited with status %d, restarting",
-                id,
-                pid,
-                os.WEXITSTATUS(status),
-            )
-        else:
-            gen_log.info("child %d (pid %d) exited normally", id, pid)
-            continue
-        num_restarts += 1
-        if num_restarts > max_restarts:
-            raise RuntimeError("Too many child restarts, giving up")
-        new_id = start_child(id)
-        if new_id is not None:
-            return new_id
-    # All child processes exited cleanly, so exit the master process
-    # instead of just returning to right after the call to
-    # fork_processes (which will probably just start up another IOLoop
-    # unless the caller checks the return value).
-    sys.exit(0)
-
-
-def task_id() -> Optional[int]:
-    """Returns the current task id, if any.
-
-    Returns None if this process was not created by `fork_processes`.
-    """
-    global _task_id
-    return _task_id
-
-
-class Subprocess(object):
-    """Wraps ``subprocess.Popen`` with IOStream support.
-
-    The constructor is the same as ``subprocess.Popen`` with the following
-    additions:
-
-    * ``stdin``, ``stdout``, and ``stderr`` may have the value
-      ``tornado.process.Subprocess.STREAM``, which will make the corresponding
-      attribute of the resulting Subprocess a `.PipeIOStream`. If this option
-      is used, the caller is responsible for closing the streams when done
-      with them.
-
-    The ``Subprocess.STREAM`` option and the ``set_exit_callback`` and
-    ``wait_for_exit`` methods do not work on Windows. There is
-    therefore no reason to use this class instead of
-    ``subprocess.Popen`` on that platform.
-
-    .. versionchanged:: 5.0
-       The ``io_loop`` argument (deprecated since version 4.1) has been removed.
-
-    """
-
-    STREAM = object()
-
-    _initialized = False
-    _waiting = {}  # type: ignore
-    _old_sigchld = None
-
-    def __init__(self, *args: Any, **kwargs: Any) -> None:
-        self.io_loop = ioloop.IOLoop.current()
-        # All FDs we create should be closed on error; those in to_close
-        # should be closed in the parent process on success.
-        pipe_fds = []  # type: List[int]
-        to_close = []  # type: List[int]
-        if kwargs.get("stdin") is Subprocess.STREAM:
-            in_r, in_w = _pipe_cloexec()
-            kwargs["stdin"] = in_r
-            pipe_fds.extend((in_r, in_w))
-            to_close.append(in_r)
-            self.stdin = PipeIOStream(in_w)
-        if kwargs.get("stdout") is Subprocess.STREAM:
-            out_r, out_w = _pipe_cloexec()
-            kwargs["stdout"] = out_w
-            pipe_fds.extend((out_r, out_w))
-            to_close.append(out_w)
-            self.stdout = PipeIOStream(out_r)
-        if kwargs.get("stderr") is Subprocess.STREAM:
-            err_r, err_w = _pipe_cloexec()
-            kwargs["stderr"] = err_w
-            pipe_fds.extend((err_r, err_w))
-            to_close.append(err_w)
-            self.stderr = PipeIOStream(err_r)
-        try:
-            self.proc = subprocess.Popen(*args, **kwargs)
-        except:
-            for fd in pipe_fds:
-                os.close(fd)
-            raise
-        for fd in to_close:
-            os.close(fd)
-        self.pid = self.proc.pid
-        for attr in ["stdin", "stdout", "stderr"]:
-            if not hasattr(self, attr):  # don't clobber streams set above
-                setattr(self, attr, getattr(self.proc, attr))
-        self._exit_callback = None  # type: Optional[Callable[[int], None]]
-        self.returncode = None  # type: Optional[int]
-
-    def set_exit_callback(self, callback: Callable[[int], None]) -> None:
-        """Runs ``callback`` when this process exits.
-
-        The callback takes one argument, the return code of the process.
-
-        This method uses a ``SIGCHLD`` handler, which is a global setting
-        and may conflict if you have other libraries trying to handle the
-        same signal.  If you are using more than one ``IOLoop`` it may
-        be necessary to call `Subprocess.initialize` first to designate
-        one ``IOLoop`` to run the signal handlers.
-
-        In many cases a close callback on the stdout or stderr streams
-        can be used as an alternative to an exit callback if the
-        signal handler is causing a problem.
-        """
-        self._exit_callback = callback
-        Subprocess.initialize()
-        Subprocess._waiting[self.pid] = self
-        Subprocess._try_cleanup_process(self.pid)
-
-    def wait_for_exit(self, raise_error: bool = True) -> "Future[int]":
-        """Returns a `.Future` which resolves when the process exits.
-
-        Usage::
-
-            ret = yield proc.wait_for_exit()
-
-        This is a coroutine-friendly alternative to `set_exit_callback`
-        (and a replacement for the blocking `subprocess.Popen.wait`).
-
-        By default, raises `subprocess.CalledProcessError` if the process
-        has a non-zero exit status. Use ``wait_for_exit(raise_error=False)``
-        to suppress this behavior and return the exit status without raising.
-
-        .. versionadded:: 4.2
-        """
-        future = Future()  # type: Future[int]
-
-        def callback(ret: int) -> None:
-            if ret != 0 and raise_error:
-                # Unfortunately we don't have the original args any more.
-                future_set_exception_unless_cancelled(
-                    future, CalledProcessError(ret, "unknown")
-                )
-            else:
-                future_set_result_unless_cancelled(future, ret)
-
-        self.set_exit_callback(callback)
-        return future
-
-    @classmethod
-    def initialize(cls) -> None:
-        """Initializes the ``SIGCHLD`` handler.
-
-        The signal handler is run on an `.IOLoop` to avoid locking issues.
-        Note that the `.IOLoop` used for signal handling need not be the
-        same one used by individual Subprocess objects (as long as the
-        ``IOLoops`` are each running in separate threads).
-
-        .. versionchanged:: 5.0
-           The ``io_loop`` argument (deprecated since version 4.1) has been
-           removed.
-        """
-        if cls._initialized:
-            return
-        io_loop = ioloop.IOLoop.current()
-        cls._old_sigchld = signal.signal(
-            signal.SIGCHLD,
-            lambda sig, frame: io_loop.add_callback_from_signal(cls._cleanup),
-        )
-        cls._initialized = True
-
-    @classmethod
-    def uninitialize(cls) -> None:
-        """Removes the ``SIGCHLD`` handler."""
-        if not cls._initialized:
-            return
-        signal.signal(signal.SIGCHLD, cls._old_sigchld)
-        cls._initialized = False
-
-    @classmethod
-    def _cleanup(cls) -> None:
-        for pid in list(cls._waiting.keys()):  # make a copy
-            cls._try_cleanup_process(pid)
-
-    @classmethod
-    def _try_cleanup_process(cls, pid: int) -> None:
-        try:
-            ret_pid, status = os.waitpid(pid, os.WNOHANG)
-        except OSError as e:
-            if errno_from_exception(e) == errno.ECHILD:
-                return
-        if ret_pid == 0:
-            return
-        assert ret_pid == pid
-        subproc = cls._waiting.pop(pid)
-        subproc.io_loop.add_callback_from_signal(subproc._set_returncode, status)
-
-    def _set_returncode(self, status: int) -> None:
-        if os.WIFSIGNALED(status):
-            self.returncode = -os.WTERMSIG(status)
-        else:
-            assert os.WIFEXITED(status)
-            self.returncode = os.WEXITSTATUS(status)
-        # We've taken over wait() duty from the subprocess.Popen
-        # object. If we don't inform it of the process's return code,
-        # it will log a warning at destruction in python 3.6+.
-        self.proc.returncode = self.returncode
-        if self._exit_callback:
-            callback = self._exit_callback
-            self._exit_callback = None
-            callback(self.returncode)
diff --git a/venv/lib/python3.7/site-packages/tornado/py.typed b/venv/lib/python3.7/site-packages/tornado/py.typed
deleted file mode 100644
index e69de29..0000000
diff --git a/venv/lib/python3.7/site-packages/tornado/queues.py b/venv/lib/python3.7/site-packages/tornado/queues.py
deleted file mode 100644
index 19ff6c6..0000000
--- a/venv/lib/python3.7/site-packages/tornado/queues.py
+++ /dev/null
@@ -1,410 +0,0 @@
-# Copyright 2015 The Tornado Authors
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-"""Asynchronous queues for coroutines. These classes are very similar
-to those provided in the standard library's `asyncio package
-<https://docs.python.org/3/library/asyncio-queue.html>`_.
-
-.. warning::
-
-   Unlike the standard library's `queue` module, the classes defined here
-   are *not* thread-safe. To use these queues from another thread,
-   use `.IOLoop.add_callback` to transfer control to the `.IOLoop` thread
-   before calling any queue methods.
-
-"""
-
-import collections
-import datetime
-import heapq
-
-from tornado import gen, ioloop
-from tornado.concurrent import Future, future_set_result_unless_cancelled
-from tornado.locks import Event
-
-from typing import Union, TypeVar, Generic, Awaitable
-import typing
-
-if typing.TYPE_CHECKING:
-    from typing import Deque, Tuple, List, Any  # noqa: F401
-
-_T = TypeVar("_T")
-
-__all__ = ["Queue", "PriorityQueue", "LifoQueue", "QueueFull", "QueueEmpty"]
-
-
-class QueueEmpty(Exception):
-    """Raised by `.Queue.get_nowait` when the queue has no items."""
-
-    pass
-
-
-class QueueFull(Exception):
-    """Raised by `.Queue.put_nowait` when a queue is at its maximum size."""
-
-    pass
-
-
-def _set_timeout(
-    future: Future, timeout: Union[None, float, datetime.timedelta]
-) -> None:
-    if timeout:
-
-        def on_timeout() -> None:
-            if not future.done():
-                future.set_exception(gen.TimeoutError())
-
-        io_loop = ioloop.IOLoop.current()
-        timeout_handle = io_loop.add_timeout(timeout, on_timeout)
-        future.add_done_callback(lambda _: io_loop.remove_timeout(timeout_handle))
-
-
-class _QueueIterator(Generic[_T]):
-    def __init__(self, q: "Queue[_T]") -> None:
-        self.q = q
-
-    def __anext__(self) -> Awaitable[_T]:
-        return self.q.get()
-
-
-class Queue(Generic[_T]):
-    """Coordinate producer and consumer coroutines.
-
-    If maxsize is 0 (the default) the queue size is unbounded.
-
-    .. testcode::
-
-        from tornado import gen
-        from tornado.ioloop import IOLoop
-        from tornado.queues import Queue
-
-        q = Queue(maxsize=2)
-
-        async def consumer():
-            async for item in q:
-                try:
-                    print('Doing work on %s' % item)
-                    await gen.sleep(0.01)
-                finally:
-                    q.task_done()
-
-        async def producer():
-            for item in range(5):
-                await q.put(item)
-                print('Put %s' % item)
-
-        async def main():
-            # Start consumer without waiting (since it never finishes).
-            IOLoop.current().spawn_callback(consumer)
-            await producer()     # Wait for producer to put all tasks.
-            await q.join()       # Wait for consumer to finish all tasks.
-            print('Done')
-
-        IOLoop.current().run_sync(main)
-
-    .. testoutput::
-
-        Put 0
-        Put 1
-        Doing work on 0
-        Put 2
-        Doing work on 1
-        Put 3
-        Doing work on 2
-        Put 4
-        Doing work on 3
-        Doing work on 4
-        Done
-
-
-    In versions of Python without native coroutines (before 3.5),
-    ``consumer()`` could be written as::
-
-        @gen.coroutine
-        def consumer():
-            while True:
-                item = yield q.get()
-                try:
-                    print('Doing work on %s' % item)
-                    yield gen.sleep(0.01)
-                finally:
-                    q.task_done()
-
-    .. versionchanged:: 4.3
-       Added ``async for`` support in Python 3.5.
-
-    """
-
-    # Exact type depends on subclass. Could be another generic
-    # parameter and use protocols to be more precise here.
-    _queue = None  # type: Any
-
-    def __init__(self, maxsize: int = 0) -> None:
-        if maxsize is None:
-            raise TypeError("maxsize can't be None")
-
-        if maxsize < 0:
-            raise ValueError("maxsize can't be negative")
-
-        self._maxsize = maxsize
-        self._init()
-        self._getters = collections.deque([])  # type: Deque[Future[_T]]
-        self._putters = collections.deque([])  # type: Deque[Tuple[_T, Future[None]]]
-        self._unfinished_tasks = 0
-        self._finished = Event()
-        self._finished.set()
-
-    @property
-    def maxsize(self) -> int:
-        """Number of items allowed in the queue."""
-        return self._maxsize
-
-    def qsize(self) -> int:
-        """Number of items in the queue."""
-        return len(self._queue)
-
-    def empty(self) -> bool:
-        return not self._queue
-
-    def full(self) -> bool:
-        if self.maxsize == 0:
-            return False
-        else:
-            return self.qsize() >= self.maxsize
-
-    def put(
-        self, item: _T, timeout: Union[float, datetime.timedelta] = None
-    ) -> "Future[None]":
-        """Put an item into the queue, perhaps waiting until there is room.
-
-        Returns a Future, which raises `tornado.util.TimeoutError` after a
-        timeout.
-
-        ``timeout`` may be a number denoting a time (on the same
-        scale as `tornado.ioloop.IOLoop.time`, normally `time.time`), or a
-        `datetime.timedelta` object for a deadline relative to the
-        current time.
-        """
-        future = Future()  # type: Future[None]
-        try:
-            self.put_nowait(item)
-        except QueueFull:
-            self._putters.append((item, future))
-            _set_timeout(future, timeout)
-        else:
-            future.set_result(None)
-        return future
-
-    def put_nowait(self, item: _T) -> None:
-        """Put an item into the queue without blocking.
-
-        If no free slot is immediately available, raise `QueueFull`.
-        """
-        self._consume_expired()
-        if self._getters:
-            assert self.empty(), "queue non-empty, why are getters waiting?"
-            getter = self._getters.popleft()
-            self.__put_internal(item)
-            future_set_result_unless_cancelled(getter, self._get())
-        elif self.full():
-            raise QueueFull
-        else:
-            self.__put_internal(item)
-
-    def get(self, timeout: Union[float, datetime.timedelta] = None) -> Awaitable[_T]:
-        """Remove and return an item from the queue.
-
-        Returns an awaitable which resolves once an item is available, or raises
-        `tornado.util.TimeoutError` after a timeout.
-
-        ``timeout`` may be a number denoting a time (on the same
-        scale as `tornado.ioloop.IOLoop.time`, normally `time.time`), or a
-        `datetime.timedelta` object for a deadline relative to the
-        current time.
-
-        .. note::
-
-           The ``timeout`` argument of this method differs from that
-           of the standard library's `queue.Queue.get`. That method
-           interprets numeric values as relative timeouts; this one
-           interprets them as absolute deadlines and requires
-           ``timedelta`` objects for relative timeouts (consistent
-           with other timeouts in Tornado).
-
-        """
-        future = Future()  # type: Future[_T]
-        try:
-            future.set_result(self.get_nowait())
-        except QueueEmpty:
-            self._getters.append(future)
-            _set_timeout(future, timeout)
-        return future
-
-    def get_nowait(self) -> _T:
-        """Remove and return an item from the queue without blocking.
-
-        Return an item if one is immediately available, else raise
-        `QueueEmpty`.
-        """
-        self._consume_expired()
-        if self._putters:
-            assert self.full(), "queue not full, why are putters waiting?"
-            item, putter = self._putters.popleft()
-            self.__put_internal(item)
-            future_set_result_unless_cancelled(putter, None)
-            return self._get()
-        elif self.qsize():
-            return self._get()
-        else:
-            raise QueueEmpty
-
-    def task_done(self) -> None:
-        """Indicate that a formerly enqueued task is complete.
-
-        Used by queue consumers. For each `.get` used to fetch a task, a
-        subsequent call to `.task_done` tells the queue that the processing
-        on the task is complete.
-
-        If a `.join` is blocking, it resumes when all items have been
-        processed; that is, when every `.put` is matched by a `.task_done`.
-
-        Raises `ValueError` if called more times than `.put`.
-        """
-        if self._unfinished_tasks <= 0:
-            raise ValueError("task_done() called too many times")
-        self._unfinished_tasks -= 1
-        if self._unfinished_tasks == 0:
-            self._finished.set()
-
-    def join(self, timeout: Union[float, datetime.timedelta] = None) -> Awaitable[None]:
-        """Block until all items in the queue are processed.
-
-        Returns an awaitable, which raises `tornado.util.TimeoutError` after a
-        timeout.
-        """
-        return self._finished.wait(timeout)
-
-    def __aiter__(self) -> _QueueIterator[_T]:
-        return _QueueIterator(self)
-
-    # These three are overridable in subclasses.
-    def _init(self) -> None:
-        self._queue = collections.deque()
-
-    def _get(self) -> _T:
-        return self._queue.popleft()
-
-    def _put(self, item: _T) -> None:
-        self._queue.append(item)
-
-    # End of the overridable methods.
-
-    def __put_internal(self, item: _T) -> None:
-        self._unfinished_tasks += 1
-        self._finished.clear()
-        self._put(item)
-
-    def _consume_expired(self) -> None:
-        # Remove timed-out waiters.
-        while self._putters and self._putters[0][1].done():
-            self._putters.popleft()
-
-        while self._getters and self._getters[0].done():
-            self._getters.popleft()
-
-    def __repr__(self) -> str:
-        return "<%s at %s %s>" % (type(self).__name__, hex(id(self)), self._format())
-
-    def __str__(self) -> str:
-        return "<%s %s>" % (type(self).__name__, self._format())
-
-    def _format(self) -> str:
-        result = "maxsize=%r" % (self.maxsize,)
-        if getattr(self, "_queue", None):
-            result += " queue=%r" % self._queue
-        if self._getters:
-            result += " getters[%s]" % len(self._getters)
-        if self._putters:
-            result += " putters[%s]" % len(self._putters)
-        if self._unfinished_tasks:
-            result += " tasks=%s" % self._unfinished_tasks
-        return result
-
-
-class PriorityQueue(Queue):
-    """A `.Queue` that retrieves entries in priority order, lowest first.
-
-    Entries are typically tuples like ``(priority number, data)``.
-
-    .. testcode::
-
-        from tornado.queues import PriorityQueue
-
-        q = PriorityQueue()
-        q.put((1, 'medium-priority item'))
-        q.put((0, 'high-priority item'))
-        q.put((10, 'low-priority item'))
-
-        print(q.get_nowait())
-        print(q.get_nowait())
-        print(q.get_nowait())
-
-    .. testoutput::
-
-        (0, 'high-priority item')
-        (1, 'medium-priority item')
-        (10, 'low-priority item')
-    """
-
-    def _init(self) -> None:
-        self._queue = []
-
-    def _put(self, item: _T) -> None:
-        heapq.heappush(self._queue, item)
-
-    def _get(self) -> _T:
-        return heapq.heappop(self._queue)
-
-
-class LifoQueue(Queue):
-    """A `.Queue` that retrieves the most recently put items first.
-
-    .. testcode::
-
-        from tornado.queues import LifoQueue
-
-        q = LifoQueue()
-        q.put(3)
-        q.put(2)
-        q.put(1)
-
-        print(q.get_nowait())
-        print(q.get_nowait())
-        print(q.get_nowait())
-
-    .. testoutput::
-
-        1
-        2
-        3
-    """
-
-    def _init(self) -> None:
-        self._queue = []
-
-    def _put(self, item: _T) -> None:
-        self._queue.append(item)
-
-    def _get(self) -> _T:
-        return self._queue.pop()
diff --git a/venv/lib/python3.7/site-packages/tornado/routing.py b/venv/lib/python3.7/site-packages/tornado/routing.py
deleted file mode 100644
index ae7abcd..0000000
--- a/venv/lib/python3.7/site-packages/tornado/routing.py
+++ /dev/null
@@ -1,711 +0,0 @@
-# Copyright 2015 The Tornado Authors
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-"""Flexible routing implementation.
-
-Tornado routes HTTP requests to appropriate handlers using `Router`
-class implementations. The `tornado.web.Application` class is a
-`Router` implementation and may be used directly, or the classes in
-this module may be used for additional flexibility. The `RuleRouter`
-class can match on more criteria than `.Application`, or the `Router`
-interface can be subclassed for maximum customization.
-
-`Router` interface extends `~.httputil.HTTPServerConnectionDelegate`
-to provide additional routing capabilities. This also means that any
-`Router` implementation can be used directly as a ``request_callback``
-for `~.httpserver.HTTPServer` constructor.
-
-`Router` subclass must implement a ``find_handler`` method to provide
-a suitable `~.httputil.HTTPMessageDelegate` instance to handle the
-request:
-
-.. code-block:: python
-
-    class CustomRouter(Router):
-        def find_handler(self, request, **kwargs):
-            # some routing logic providing a suitable HTTPMessageDelegate instance
-            return MessageDelegate(request.connection)
-
-    class MessageDelegate(HTTPMessageDelegate):
-        def __init__(self, connection):
-            self.connection = connection
-
-        def finish(self):
-            self.connection.write_headers(
-                ResponseStartLine("HTTP/1.1", 200, "OK"),
-                HTTPHeaders({"Content-Length": "2"}),
-                b"OK")
-            self.connection.finish()
-
-    router = CustomRouter()
-    server = HTTPServer(router)
-
-The main responsibility of `Router` implementation is to provide a
-mapping from a request to `~.httputil.HTTPMessageDelegate` instance
-that will handle this request. In the example above we can see that
-routing is possible even without instantiating an `~.web.Application`.
-
-For routing to `~.web.RequestHandler` implementations we need an
-`~.web.Application` instance. `~.web.Application.get_handler_delegate`
-provides a convenient way to create `~.httputil.HTTPMessageDelegate`
-for a given request and `~.web.RequestHandler`.
-
-Here is a simple example of how we can we route to
-`~.web.RequestHandler` subclasses by HTTP method:
-
-.. code-block:: python
-
-    resources = {}
-
-    class GetResource(RequestHandler):
-        def get(self, path):
-            if path not in resources:
-                raise HTTPError(404)
-
-            self.finish(resources[path])
-
-    class PostResource(RequestHandler):
-        def post(self, path):
-            resources[path] = self.request.body
-
-    class HTTPMethodRouter(Router):
-        def __init__(self, app):
-            self.app = app
-
-        def find_handler(self, request, **kwargs):
-            handler = GetResource if request.method == "GET" else PostResource
-            return self.app.get_handler_delegate(request, handler, path_args=[request.path])
-
-    router = HTTPMethodRouter(Application())
-    server = HTTPServer(router)
-
-`ReversibleRouter` interface adds the ability to distinguish between
-the routes and reverse them to the original urls using route's name
-and additional arguments. `~.web.Application` is itself an
-implementation of `ReversibleRouter` class.
-
-`RuleRouter` and `ReversibleRuleRouter` are implementations of
-`Router` and `ReversibleRouter` interfaces and can be used for
-creating rule-based routing configurations.
-
-Rules are instances of `Rule` class. They contain a `Matcher`, which
-provides the logic for determining whether the rule is a match for a
-particular request and a target, which can be one of the following.
-
-1) An instance of `~.httputil.HTTPServerConnectionDelegate`:
-
-.. code-block:: python
-
-    router = RuleRouter([
-        Rule(PathMatches("/handler"), ConnectionDelegate()),
-        # ... more rules
-    ])
-
-    class ConnectionDelegate(HTTPServerConnectionDelegate):
-        def start_request(self, server_conn, request_conn):
-            return MessageDelegate(request_conn)
-
-2) A callable accepting a single argument of `~.httputil.HTTPServerRequest` type:
-
-.. code-block:: python
-
-    router = RuleRouter([
-        Rule(PathMatches("/callable"), request_callable)
-    ])
-
-    def request_callable(request):
-        request.write(b"HTTP/1.1 200 OK\\r\\nContent-Length: 2\\r\\n\\r\\nOK")
-        request.finish()
-
-3) Another `Router` instance:
-
-.. code-block:: python
-
-    router = RuleRouter([
-        Rule(PathMatches("/router.*"), CustomRouter())
-    ])
-
-Of course a nested `RuleRouter` or a `~.web.Application` is allowed:
-
-.. code-block:: python
-
-    router = RuleRouter([
-        Rule(HostMatches("example.com"), RuleRouter([
-            Rule(PathMatches("/app1/.*"), Application([(r"/app1/handler", Handler)]))),
-        ]))
-    ])
-
-    server = HTTPServer(router)
-
-In the example below `RuleRouter` is used to route between applications:
-
-.. code-block:: python
-
-    app1 = Application([
-        (r"/app1/handler", Handler1),
-        # other handlers ...
-    ])
-
-    app2 = Application([
-        (r"/app2/handler", Handler2),
-        # other handlers ...
-    ])
-
-    router = RuleRouter([
-        Rule(PathMatches("/app1.*"), app1),
-        Rule(PathMatches("/app2.*"), app2)
-    ])
-
-    server = HTTPServer(router)
-
-For more information on application-level routing see docs for `~.web.Application`.
-
-.. versionadded:: 4.5
-
-"""
-
-import re
-from functools import partial
-
-from tornado import httputil
-from tornado.httpserver import _CallableAdapter
-from tornado.escape import url_escape, url_unescape, utf8
-from tornado.log import app_log
-from tornado.util import basestring_type, import_object, re_unescape, unicode_type
-
-from typing import Any, Union, Optional, Awaitable, List, Dict, Pattern, Tuple, overload
-
-
-class Router(httputil.HTTPServerConnectionDelegate):
-    """Abstract router interface."""
-
-    def find_handler(
-        self, request: httputil.HTTPServerRequest, **kwargs: Any
-    ) -> Optional[httputil.HTTPMessageDelegate]:
-        """Must be implemented to return an appropriate instance of `~.httputil.HTTPMessageDelegate`
-        that can serve the request.
-        Routing implementations may pass additional kwargs to extend the routing logic.
-
-        :arg httputil.HTTPServerRequest request: current HTTP request.
-        :arg kwargs: additional keyword arguments passed by routing implementation.
-        :returns: an instance of `~.httputil.HTTPMessageDelegate` that will be used to
-            process the request.
-        """
-        raise NotImplementedError()
-
-    def start_request(
-        self, server_conn: object, request_conn: httputil.HTTPConnection
-    ) -> httputil.HTTPMessageDelegate:
-        return _RoutingDelegate(self, server_conn, request_conn)
-
-
-class ReversibleRouter(Router):
-    """Abstract router interface for routers that can handle named routes
-    and support reversing them to original urls.
-    """
-
-    def reverse_url(self, name: str, *args: Any) -> Optional[str]:
-        """Returns url string for a given route name and arguments
-        or ``None`` if no match is found.
-
-        :arg str name: route name.
-        :arg args: url parameters.
-        :returns: parametrized url string for a given route name (or ``None``).
-        """
-        raise NotImplementedError()
-
-
-class _RoutingDelegate(httputil.HTTPMessageDelegate):
-    def __init__(
-        self, router: Router, server_conn: object, request_conn: httputil.HTTPConnection
-    ) -> None:
-        self.server_conn = server_conn
-        self.request_conn = request_conn
-        self.delegate = None  # type: Optional[httputil.HTTPMessageDelegate]
-        self.router = router  # type: Router
-
-    def headers_received(
-        self,
-        start_line: Union[httputil.RequestStartLine, httputil.ResponseStartLine],
-        headers: httputil.HTTPHeaders,
-    ) -> Optional[Awaitable[None]]:
-        assert isinstance(start_line, httputil.RequestStartLine)
-        request = httputil.HTTPServerRequest(
-            connection=self.request_conn,
-            server_connection=self.server_conn,
-            start_line=start_line,
-            headers=headers,
-        )
-
-        self.delegate = self.router.find_handler(request)
-        if self.delegate is None:
-            app_log.debug(
-                "Delegate for %s %s request not found",
-                start_line.method,
-                start_line.path,
-            )
-            self.delegate = _DefaultMessageDelegate(self.request_conn)
-
-        return self.delegate.headers_received(start_line, headers)
-
-    def data_received(self, chunk: bytes) -> Optional[Awaitable[None]]:
-        assert self.delegate is not None
-        return self.delegate.data_received(chunk)
-
-    def finish(self) -> None:
-        assert self.delegate is not None
-        self.delegate.finish()
-
-    def on_connection_close(self) -> None:
-        assert self.delegate is not None
-        self.delegate.on_connection_close()
-
-
-class _DefaultMessageDelegate(httputil.HTTPMessageDelegate):
-    def __init__(self, connection: httputil.HTTPConnection) -> None:
-        self.connection = connection
-
-    def finish(self) -> None:
-        self.connection.write_headers(
-            httputil.ResponseStartLine("HTTP/1.1", 404, "Not Found"),
-            httputil.HTTPHeaders(),
-        )
-        self.connection.finish()
-
-
-# _RuleList can either contain pre-constructed Rules or a sequence of
-# arguments to be passed to the Rule constructor.
-_RuleList = List[
-    Union[
-        "Rule",
-        List[Any],  # Can't do detailed typechecking of lists.
-        Tuple[Union[str, "Matcher"], Any],
-        Tuple[Union[str, "Matcher"], Any, Dict[str, Any]],
-        Tuple[Union[str, "Matcher"], Any, Dict[str, Any], str],
-    ]
-]
-
-
-class RuleRouter(Router):
-    """Rule-based router implementation."""
-
-    def __init__(self, rules: _RuleList = None) -> None:
-        """Constructs a router from an ordered list of rules::
-
-            RuleRouter([
-                Rule(PathMatches("/handler"), Target),
-                # ... more rules
-            ])
-
-        You can also omit explicit `Rule` constructor and use tuples of arguments::
-
-            RuleRouter([
-                (PathMatches("/handler"), Target),
-            ])
-
-        `PathMatches` is a default matcher, so the example above can be simplified::
-
-            RuleRouter([
-                ("/handler", Target),
-            ])
-
-        In the examples above, ``Target`` can be a nested `Router` instance, an instance of
-        `~.httputil.HTTPServerConnectionDelegate` or an old-style callable,
-        accepting a request argument.
-
-        :arg rules: a list of `Rule` instances or tuples of `Rule`
-            constructor arguments.
-        """
-        self.rules = []  # type: List[Rule]
-        if rules:
-            self.add_rules(rules)
-
-    def add_rules(self, rules: _RuleList) -> None:
-        """Appends new rules to the router.
-
-        :arg rules: a list of Rule instances (or tuples of arguments, which are
-            passed to Rule constructor).
-        """
-        for rule in rules:
-            if isinstance(rule, (tuple, list)):
-                assert len(rule) in (2, 3, 4)
-                if isinstance(rule[0], basestring_type):
-                    rule = Rule(PathMatches(rule[0]), *rule[1:])
-                else:
-                    rule = Rule(*rule)
-
-            self.rules.append(self.process_rule(rule))
-
-    def process_rule(self, rule: "Rule") -> "Rule":
-        """Override this method for additional preprocessing of each rule.
-
-        :arg Rule rule: a rule to be processed.
-        :returns: the same or modified Rule instance.
-        """
-        return rule
-
-    def find_handler(
-        self, request: httputil.HTTPServerRequest, **kwargs: Any
-    ) -> Optional[httputil.HTTPMessageDelegate]:
-        for rule in self.rules:
-            target_params = rule.matcher.match(request)
-            if target_params is not None:
-                if rule.target_kwargs:
-                    target_params["target_kwargs"] = rule.target_kwargs
-
-                delegate = self.get_target_delegate(
-                    rule.target, request, **target_params
-                )
-
-                if delegate is not None:
-                    return delegate
-
-        return None
-
-    def get_target_delegate(
-        self, target: Any, request: httputil.HTTPServerRequest, **target_params: Any
-    ) -> Optional[httputil.HTTPMessageDelegate]:
-        """Returns an instance of `~.httputil.HTTPMessageDelegate` for a
-        Rule's target. This method is called by `~.find_handler` and can be
-        extended to provide additional target types.
-
-        :arg target: a Rule's target.
-        :arg httputil.HTTPServerRequest request: current request.
-        :arg target_params: additional parameters that can be useful
-            for `~.httputil.HTTPMessageDelegate` creation.
-        """
-        if isinstance(target, Router):
-            return target.find_handler(request, **target_params)
-
-        elif isinstance(target, httputil.HTTPServerConnectionDelegate):
-            assert request.connection is not None
-            return target.start_request(request.server_connection, request.connection)
-
-        elif callable(target):
-            assert request.connection is not None
-            return _CallableAdapter(
-                partial(target, **target_params), request.connection
-            )
-
-        return None
-
-
-class ReversibleRuleRouter(ReversibleRouter, RuleRouter):
-    """A rule-based router that implements ``reverse_url`` method.
-
-    Each rule added to this router may have a ``name`` attribute that can be
-    used to reconstruct an original uri. The actual reconstruction takes place
-    in a rule's matcher (see `Matcher.reverse`).
-    """
-
-    def __init__(self, rules: _RuleList = None) -> None:
-        self.named_rules = {}  # type: Dict[str, Any]
-        super(ReversibleRuleRouter, self).__init__(rules)
-
-    def process_rule(self, rule: "Rule") -> "Rule":
-        rule = super(ReversibleRuleRouter, self).process_rule(rule)
-
-        if rule.name:
-            if rule.name in self.named_rules:
-                app_log.warning(
-                    "Multiple handlers named %s; replacing previous value", rule.name
-                )
-            self.named_rules[rule.name] = rule
-
-        return rule
-
-    def reverse_url(self, name: str, *args: Any) -> Optional[str]:
-        if name in self.named_rules:
-            return self.named_rules[name].matcher.reverse(*args)
-
-        for rule in self.rules:
-            if isinstance(rule.target, ReversibleRouter):
-                reversed_url = rule.target.reverse_url(name, *args)
-                if reversed_url is not None:
-                    return reversed_url
-
-        return None
-
-
-class Rule(object):
-    """A routing rule."""
-
-    def __init__(
-        self,
-        matcher: "Matcher",
-        target: Any,
-        target_kwargs: Dict[str, Any] = None,
-        name: str = None,
-    ) -> None:
-        """Constructs a Rule instance.
-
-        :arg Matcher matcher: a `Matcher` instance used for determining
-            whether the rule should be considered a match for a specific
-            request.
-        :arg target: a Rule's target (typically a ``RequestHandler`` or
-            `~.httputil.HTTPServerConnectionDelegate` subclass or even a nested `Router`,
-            depending on routing implementation).
-        :arg dict target_kwargs: a dict of parameters that can be useful
-            at the moment of target instantiation (for example, ``status_code``
-            for a ``RequestHandler`` subclass). They end up in
-            ``target_params['target_kwargs']`` of `RuleRouter.get_target_delegate`
-            method.
-        :arg str name: the name of the rule that can be used to find it
-            in `ReversibleRouter.reverse_url` implementation.
-        """
-        if isinstance(target, str):
-            # import the Module and instantiate the class
-            # Must be a fully qualified name (module.ClassName)
-            target = import_object(target)
-
-        self.matcher = matcher  # type: Matcher
-        self.target = target
-        self.target_kwargs = target_kwargs if target_kwargs else {}
-        self.name = name
-
-    def reverse(self, *args: Any) -> Optional[str]:
-        return self.matcher.reverse(*args)
-
-    def __repr__(self) -> str:
-        return "%s(%r, %s, kwargs=%r, name=%r)" % (
-            self.__class__.__name__,
-            self.matcher,
-            self.target,
-            self.target_kwargs,
-            self.name,
-        )
-
-
-class Matcher(object):
-    """Represents a matcher for request features."""
-
-    def match(self, request: httputil.HTTPServerRequest) -> Optional[Dict[str, Any]]:
-        """Matches current instance against the request.
-
-        :arg httputil.HTTPServerRequest request: current HTTP request
-        :returns: a dict of parameters to be passed to the target handler
-            (for example, ``handler_kwargs``, ``path_args``, ``path_kwargs``
-            can be passed for proper `~.web.RequestHandler` instantiation).
-            An empty dict is a valid (and common) return value to indicate a match
-            when the argument-passing features are not used.
-            ``None`` must be returned to indicate that there is no match."""
-        raise NotImplementedError()
-
-    def reverse(self, *args: Any) -> Optional[str]:
-        """Reconstructs full url from matcher instance and additional arguments."""
-        return None
-
-
-class AnyMatches(Matcher):
-    """Matches any request."""
-
-    def match(self, request: httputil.HTTPServerRequest) -> Optional[Dict[str, Any]]:
-        return {}
-
-
-class HostMatches(Matcher):
-    """Matches requests from hosts specified by ``host_pattern`` regex."""
-
-    def __init__(self, host_pattern: Union[str, Pattern]) -> None:
-        if isinstance(host_pattern, basestring_type):
-            if not host_pattern.endswith("$"):
-                host_pattern += "$"
-            self.host_pattern = re.compile(host_pattern)
-        else:
-            self.host_pattern = host_pattern
-
-    def match(self, request: httputil.HTTPServerRequest) -> Optional[Dict[str, Any]]:
-        if self.host_pattern.match(request.host_name):
-            return {}
-
-        return None
-
-
-class DefaultHostMatches(Matcher):
-    """Matches requests from host that is equal to application's default_host.
-    Always returns no match if ``X-Real-Ip`` header is present.
-    """
-
-    def __init__(self, application: Any, host_pattern: Pattern) -> None:
-        self.application = application
-        self.host_pattern = host_pattern
-
-    def match(self, request: httputil.HTTPServerRequest) -> Optional[Dict[str, Any]]:
-        # Look for default host if not behind load balancer (for debugging)
-        if "X-Real-Ip" not in request.headers:
-            if self.host_pattern.match(self.application.default_host):
-                return {}
-        return None
-
-
-class PathMatches(Matcher):
-    """Matches requests with paths specified by ``path_pattern`` regex."""
-
-    def __init__(self, path_pattern: Union[str, Pattern]) -> None:
-        if isinstance(path_pattern, basestring_type):
-            if not path_pattern.endswith("$"):
-                path_pattern += "$"
-            self.regex = re.compile(path_pattern)
-        else:
-            self.regex = path_pattern
-
-        assert len(self.regex.groupindex) in (0, self.regex.groups), (
-            "groups in url regexes must either be all named or all "
-            "positional: %r" % self.regex.pattern
-        )
-
-        self._path, self._group_count = self._find_groups()
-
-    def match(self, request: httputil.HTTPServerRequest) -> Optional[Dict[str, Any]]:
-        match = self.regex.match(request.path)
-        if match is None:
-            return None
-        if not self.regex.groups:
-            return {}
-
-        path_args = []  # type: List[bytes]
-        path_kwargs = {}  # type: Dict[str, bytes]
-
-        # Pass matched groups to the handler.  Since
-        # match.groups() includes both named and
-        # unnamed groups, we want to use either groups
-        # or groupdict but not both.
-        if self.regex.groupindex:
-            path_kwargs = dict(
-                (str(k), _unquote_or_none(v)) for (k, v) in match.groupdict().items()
-            )
-        else:
-            path_args = [_unquote_or_none(s) for s in match.groups()]
-
-        return dict(path_args=path_args, path_kwargs=path_kwargs)
-
-    def reverse(self, *args: Any) -> Optional[str]:
-        if self._path is None:
-            raise ValueError("Cannot reverse url regex " + self.regex.pattern)
-        assert len(args) == self._group_count, (
-            "required number of arguments " "not found"
-        )
-        if not len(args):
-            return self._path
-        converted_args = []
-        for a in args:
-            if not isinstance(a, (unicode_type, bytes)):
-                a = str(a)
-            converted_args.append(url_escape(utf8(a), plus=False))
-        return self._path % tuple(converted_args)
-
-    def _find_groups(self) -> Tuple[Optional[str], Optional[int]]:
-        """Returns a tuple (reverse string, group count) for a url.
-
-        For example: Given the url pattern /([0-9]{4})/([a-z-]+)/, this method
-        would return ('/%s/%s/', 2).
-        """
-        pattern = self.regex.pattern
-        if pattern.startswith("^"):
-            pattern = pattern[1:]
-        if pattern.endswith("$"):
-            pattern = pattern[:-1]
-
-        if self.regex.groups != pattern.count("("):
-            # The pattern is too complicated for our simplistic matching,
-            # so we can't support reversing it.
-            return None, None
-
-        pieces = []
-        for fragment in pattern.split("("):
-            if ")" in fragment:
-                paren_loc = fragment.index(")")
-                if paren_loc >= 0:
-                    pieces.append("%s" + fragment[paren_loc + 1 :])
-            else:
-                try:
-                    unescaped_fragment = re_unescape(fragment)
-                except ValueError:
-                    # If we can't unescape part of it, we can't
-                    # reverse this url.
-                    return (None, None)
-                pieces.append(unescaped_fragment)
-
-        return "".join(pieces), self.regex.groups
-
-
-class URLSpec(Rule):
-    """Specifies mappings between URLs and handlers.
-
-    .. versionchanged: 4.5
-       `URLSpec` is now a subclass of a `Rule` with `PathMatches` matcher and is preserved for
-       backwards compatibility.
-    """
-
-    def __init__(
-        self,
-        pattern: Union[str, Pattern],
-        handler: Any,
-        kwargs: Dict[str, Any] = None,
-        name: str = None,
-    ) -> None:
-        """Parameters:
-
-        * ``pattern``: Regular expression to be matched. Any capturing
-          groups in the regex will be passed in to the handler's
-          get/post/etc methods as arguments (by keyword if named, by
-          position if unnamed. Named and unnamed capturing groups
-          may not be mixed in the same rule).
-
-        * ``handler``: `~.web.RequestHandler` subclass to be invoked.
-
-        * ``kwargs`` (optional): A dictionary of additional arguments
-          to be passed to the handler's constructor.
-
-        * ``name`` (optional): A name for this handler.  Used by
-          `~.web.Application.reverse_url`.
-
-        """
-        matcher = PathMatches(pattern)
-        super(URLSpec, self).__init__(matcher, handler, kwargs, name)
-
-        self.regex = matcher.regex
-        self.handler_class = self.target
-        self.kwargs = kwargs
-
-    def __repr__(self) -> str:
-        return "%s(%r, %s, kwargs=%r, name=%r)" % (
-            self.__class__.__name__,
-            self.regex.pattern,
-            self.handler_class,
-            self.kwargs,
-            self.name,
-        )
-
-
-@overload
-def _unquote_or_none(s: str) -> bytes:
-    pass
-
-
-@overload  # noqa: F811
-def _unquote_or_none(s: None) -> None:
-    pass
-
-
-def _unquote_or_none(s: Optional[str]) -> Optional[bytes]:  # noqa: F811
-    """None-safe wrapper around url_unescape to handle unmatched optional
-    groups correctly.
-
-    Note that args are passed as bytes so the handler can decide what
-    encoding to use.
-    """
-    if s is None:
-        return s
-    return url_unescape(s, encoding=None, plus=False)
diff --git a/venv/lib/python3.7/site-packages/tornado/simple_httpclient.py b/venv/lib/python3.7/site-packages/tornado/simple_httpclient.py
deleted file mode 100644
index 1d82890..0000000
--- a/venv/lib/python3.7/site-packages/tornado/simple_httpclient.py
+++ /dev/null
@@ -1,692 +0,0 @@
-from tornado.escape import _unicode
-from tornado import gen
-from tornado.httpclient import (
-    HTTPResponse,
-    HTTPError,
-    AsyncHTTPClient,
-    main,
-    _RequestProxy,
-    HTTPRequest,
-)
-from tornado import httputil
-from tornado.http1connection import HTTP1Connection, HTTP1ConnectionParameters
-from tornado.ioloop import IOLoop
-from tornado.iostream import StreamClosedError, IOStream
-from tornado.netutil import (
-    Resolver,
-    OverrideResolver,
-    _client_ssl_defaults,
-    is_valid_ip,
-)
-from tornado.log import gen_log
-from tornado.tcpclient import TCPClient
-
-import base64
-import collections
-import copy
-import functools
-import re
-import socket
-import ssl
-import sys
-import time
-from io import BytesIO
-import urllib.parse
-
-from typing import Dict, Any, Callable, Optional, Type, Union
-from types import TracebackType
-import typing
-
-if typing.TYPE_CHECKING:
-    from typing import Deque, Tuple, List  # noqa: F401
-
-
-class HTTPTimeoutError(HTTPError):
-    """Error raised by SimpleAsyncHTTPClient on timeout.
-
-    For historical reasons, this is a subclass of `.HTTPClientError`
-    which simulates a response code of 599.
-
-    .. versionadded:: 5.1
-    """
-
-    def __init__(self, message: str) -> None:
-        super(HTTPTimeoutError, self).__init__(599, message=message)
-
-    def __str__(self) -> str:
-        return self.message or "Timeout"
-
-
-class HTTPStreamClosedError(HTTPError):
-    """Error raised by SimpleAsyncHTTPClient when the underlying stream is closed.
-
-    When a more specific exception is available (such as `ConnectionResetError`),
-    it may be raised instead of this one.
-
-    For historical reasons, this is a subclass of `.HTTPClientError`
-    which simulates a response code of 599.
-
-    .. versionadded:: 5.1
-    """
-
-    def __init__(self, message: str) -> None:
-        super(HTTPStreamClosedError, self).__init__(599, message=message)
-
-    def __str__(self) -> str:
-        return self.message or "Stream closed"
-
-
-class SimpleAsyncHTTPClient(AsyncHTTPClient):
-    """Non-blocking HTTP client with no external dependencies.
-
-    This class implements an HTTP 1.1 client on top of Tornado's IOStreams.
-    Some features found in the curl-based AsyncHTTPClient are not yet
-    supported.  In particular, proxies are not supported, connections
-    are not reused, and callers cannot select the network interface to be
-    used.
-    """
-
-    def initialize(  # type: ignore
-        self,
-        max_clients: int = 10,
-        hostname_mapping: Dict[str, str] = None,
-        max_buffer_size: int = 104857600,
-        resolver: Resolver = None,
-        defaults: Dict[str, Any] = None,
-        max_header_size: int = None,
-        max_body_size: int = None,
-    ) -> None:
-        """Creates a AsyncHTTPClient.
-
-        Only a single AsyncHTTPClient instance exists per IOLoop
-        in order to provide limitations on the number of pending connections.
-        ``force_instance=True`` may be used to suppress this behavior.
-
-        Note that because of this implicit reuse, unless ``force_instance``
-        is used, only the first call to the constructor actually uses
-        its arguments. It is recommended to use the ``configure`` method
-        instead of the constructor to ensure that arguments take effect.
-
-        ``max_clients`` is the number of concurrent requests that can be
-        in progress; when this limit is reached additional requests will be
-        queued. Note that time spent waiting in this queue still counts
-        against the ``request_timeout``.
-
-        ``hostname_mapping`` is a dictionary mapping hostnames to IP addresses.
-        It can be used to make local DNS changes when modifying system-wide
-        settings like ``/etc/hosts`` is not possible or desirable (e.g. in
-        unittests).
-
-        ``max_buffer_size`` (default 100MB) is the number of bytes
-        that can be read into memory at once. ``max_body_size``
-        (defaults to ``max_buffer_size``) is the largest response body
-        that the client will accept.  Without a
-        ``streaming_callback``, the smaller of these two limits
-        applies; with a ``streaming_callback`` only ``max_body_size``
-        does.
-
-        .. versionchanged:: 4.2
-           Added the ``max_body_size`` argument.
-        """
-        super(SimpleAsyncHTTPClient, self).initialize(defaults=defaults)
-        self.max_clients = max_clients
-        self.queue = (
-            collections.deque()
-        )  # type: Deque[Tuple[object, HTTPRequest, Callable[[HTTPResponse], None]]]
-        self.active = (
-            {}
-        )  # type: Dict[object, Tuple[HTTPRequest, Callable[[HTTPResponse], None]]]
-        self.waiting = (
-            {}
-        )  # type: Dict[object, Tuple[HTTPRequest, Callable[[HTTPResponse], None], object]]
-        self.max_buffer_size = max_buffer_size
-        self.max_header_size = max_header_size
-        self.max_body_size = max_body_size
-        # TCPClient could create a Resolver for us, but we have to do it
-        # ourselves to support hostname_mapping.
-        if resolver:
-            self.resolver = resolver
-            self.own_resolver = False
-        else:
-            self.resolver = Resolver()
-            self.own_resolver = True
-        if hostname_mapping is not None:
-            self.resolver = OverrideResolver(
-                resolver=self.resolver, mapping=hostname_mapping
-            )
-        self.tcp_client = TCPClient(resolver=self.resolver)
-
-    def close(self) -> None:
-        super(SimpleAsyncHTTPClient, self).close()
-        if self.own_resolver:
-            self.resolver.close()
-        self.tcp_client.close()
-
-    def fetch_impl(
-        self, request: HTTPRequest, callback: Callable[[HTTPResponse], None]
-    ) -> None:
-        key = object()
-        self.queue.append((key, request, callback))
-        if not len(self.active) < self.max_clients:
-            assert request.connect_timeout is not None
-            assert request.request_timeout is not None
-            timeout_handle = self.io_loop.add_timeout(
-                self.io_loop.time()
-                + min(request.connect_timeout, request.request_timeout),
-                functools.partial(self._on_timeout, key, "in request queue"),
-            )
-        else:
-            timeout_handle = None
-        self.waiting[key] = (request, callback, timeout_handle)
-        self._process_queue()
-        if self.queue:
-            gen_log.debug(
-                "max_clients limit reached, request queued. "
-                "%d active, %d queued requests." % (len(self.active), len(self.queue))
-            )
-
-    def _process_queue(self) -> None:
-        while self.queue and len(self.active) < self.max_clients:
-            key, request, callback = self.queue.popleft()
-            if key not in self.waiting:
-                continue
-            self._remove_timeout(key)
-            self.active[key] = (request, callback)
-            release_callback = functools.partial(self._release_fetch, key)
-            self._handle_request(request, release_callback, callback)
-
-    def _connection_class(self) -> type:
-        return _HTTPConnection
-
-    def _handle_request(
-        self,
-        request: HTTPRequest,
-        release_callback: Callable[[], None],
-        final_callback: Callable[[HTTPResponse], None],
-    ) -> None:
-        self._connection_class()(
-            self,
-            request,
-            release_callback,
-            final_callback,
-            self.max_buffer_size,
-            self.tcp_client,
-            self.max_header_size,
-            self.max_body_size,
-        )
-
-    def _release_fetch(self, key: object) -> None:
-        del self.active[key]
-        self._process_queue()
-
-    def _remove_timeout(self, key: object) -> None:
-        if key in self.waiting:
-            request, callback, timeout_handle = self.waiting[key]
-            if timeout_handle is not None:
-                self.io_loop.remove_timeout(timeout_handle)
-            del self.waiting[key]
-
-    def _on_timeout(self, key: object, info: str = None) -> None:
-        """Timeout callback of request.
-
-        Construct a timeout HTTPResponse when a timeout occurs.
-
-        :arg object key: A simple object to mark the request.
-        :info string key: More detailed timeout information.
-        """
-        request, callback, timeout_handle = self.waiting[key]
-        self.queue.remove((key, request, callback))
-
-        error_message = "Timeout {0}".format(info) if info else "Timeout"
-        timeout_response = HTTPResponse(
-            request,
-            599,
-            error=HTTPTimeoutError(error_message),
-            request_time=self.io_loop.time() - request.start_time,
-        )
-        self.io_loop.add_callback(callback, timeout_response)
-        del self.waiting[key]
-
-
-class _HTTPConnection(httputil.HTTPMessageDelegate):
-    _SUPPORTED_METHODS = set(
-        ["GET", "HEAD", "POST", "PUT", "DELETE", "PATCH", "OPTIONS"]
-    )
-
-    def __init__(
-        self,
-        client: Optional[SimpleAsyncHTTPClient],
-        request: HTTPRequest,
-        release_callback: Callable[[], None],
-        final_callback: Callable[[HTTPResponse], None],
-        max_buffer_size: int,
-        tcp_client: TCPClient,
-        max_header_size: int,
-        max_body_size: int,
-    ) -> None:
-        self.io_loop = IOLoop.current()
-        self.start_time = self.io_loop.time()
-        self.start_wall_time = time.time()
-        self.client = client
-        self.request = request
-        self.release_callback = release_callback
-        self.final_callback = final_callback
-        self.max_buffer_size = max_buffer_size
-        self.tcp_client = tcp_client
-        self.max_header_size = max_header_size
-        self.max_body_size = max_body_size
-        self.code = None  # type: Optional[int]
-        self.headers = None  # type: Optional[httputil.HTTPHeaders]
-        self.chunks = []  # type: List[bytes]
-        self._decompressor = None
-        # Timeout handle returned by IOLoop.add_timeout
-        self._timeout = None  # type: object
-        self._sockaddr = None
-        IOLoop.current().add_future(
-            gen.convert_yielded(self.run()), lambda f: f.result()
-        )
-
-    async def run(self) -> None:
-        try:
-            self.parsed = urllib.parse.urlsplit(_unicode(self.request.url))
-            if self.parsed.scheme not in ("http", "https"):
-                raise ValueError("Unsupported url scheme: %s" % self.request.url)
-            # urlsplit results have hostname and port results, but they
-            # didn't support ipv6 literals until python 2.7.
-            netloc = self.parsed.netloc
-            if "@" in netloc:
-                userpass, _, netloc = netloc.rpartition("@")
-            host, port = httputil.split_host_and_port(netloc)
-            if port is None:
-                port = 443 if self.parsed.scheme == "https" else 80
-            if re.match(r"^\[.*\]$", host):
-                # raw ipv6 addresses in urls are enclosed in brackets
-                host = host[1:-1]
-            self.parsed_hostname = host  # save final host for _on_connect
-
-            if self.request.allow_ipv6 is False:
-                af = socket.AF_INET
-            else:
-                af = socket.AF_UNSPEC
-
-            ssl_options = self._get_ssl_options(self.parsed.scheme)
-
-            source_ip = None
-            if self.request.network_interface:
-                if is_valid_ip(self.request.network_interface):
-                    source_ip = self.request.network_interface
-                else:
-                    raise ValueError(
-                        "Unrecognized IPv4 or IPv6 address for network_interface, got %r"
-                        % (self.request.network_interface,)
-                    )
-
-            timeout = min(self.request.connect_timeout, self.request.request_timeout)
-            if timeout:
-                self._timeout = self.io_loop.add_timeout(
-                    self.start_time + timeout,
-                    functools.partial(self._on_timeout, "while connecting"),
-                )
-                stream = await self.tcp_client.connect(
-                    host,
-                    port,
-                    af=af,
-                    ssl_options=ssl_options,
-                    max_buffer_size=self.max_buffer_size,
-                    source_ip=source_ip,
-                )
-
-                if self.final_callback is None:
-                    # final_callback is cleared if we've hit our timeout.
-                    stream.close()
-                    return
-                self.stream = stream
-                self.stream.set_close_callback(self.on_connection_close)
-                self._remove_timeout()
-                if self.final_callback is None:
-                    return
-                if self.request.request_timeout:
-                    self._timeout = self.io_loop.add_timeout(
-                        self.start_time + self.request.request_timeout,
-                        functools.partial(self._on_timeout, "during request"),
-                    )
-                if (
-                    self.request.method not in self._SUPPORTED_METHODS
-                    and not self.request.allow_nonstandard_methods
-                ):
-                    raise KeyError("unknown method %s" % self.request.method)
-                for key in (
-                    "proxy_host",
-                    "proxy_port",
-                    "proxy_username",
-                    "proxy_password",
-                    "proxy_auth_mode",
-                ):
-                    if getattr(self.request, key, None):
-                        raise NotImplementedError("%s not supported" % key)
-                if "Connection" not in self.request.headers:
-                    self.request.headers["Connection"] = "close"
-                if "Host" not in self.request.headers:
-                    if "@" in self.parsed.netloc:
-                        self.request.headers["Host"] = self.parsed.netloc.rpartition(
-                            "@"
-                        )[-1]
-                    else:
-                        self.request.headers["Host"] = self.parsed.netloc
-                username, password = None, None
-                if self.parsed.username is not None:
-                    username, password = self.parsed.username, self.parsed.password
-                elif self.request.auth_username is not None:
-                    username = self.request.auth_username
-                    password = self.request.auth_password or ""
-                if username is not None:
-                    assert password is not None
-                    if self.request.auth_mode not in (None, "basic"):
-                        raise ValueError(
-                            "unsupported auth_mode %s", self.request.auth_mode
-                        )
-                    self.request.headers["Authorization"] = "Basic " + _unicode(
-                        base64.b64encode(
-                            httputil.encode_username_password(username, password)
-                        )
-                    )
-                if self.request.user_agent:
-                    self.request.headers["User-Agent"] = self.request.user_agent
-                if not self.request.allow_nonstandard_methods:
-                    # Some HTTP methods nearly always have bodies while others
-                    # almost never do. Fail in this case unless the user has
-                    # opted out of sanity checks with allow_nonstandard_methods.
-                    body_expected = self.request.method in ("POST", "PATCH", "PUT")
-                    body_present = (
-                        self.request.body is not None
-                        or self.request.body_producer is not None
-                    )
-                    if (body_expected and not body_present) or (
-                        body_present and not body_expected
-                    ):
-                        raise ValueError(
-                            "Body must %sbe None for method %s (unless "
-                            "allow_nonstandard_methods is true)"
-                            % ("not " if body_expected else "", self.request.method)
-                        )
-                if self.request.expect_100_continue:
-                    self.request.headers["Expect"] = "100-continue"
-                if self.request.body is not None:
-                    # When body_producer is used the caller is responsible for
-                    # setting Content-Length (or else chunked encoding will be used).
-                    self.request.headers["Content-Length"] = str(len(self.request.body))
-                if (
-                    self.request.method == "POST"
-                    and "Content-Type" not in self.request.headers
-                ):
-                    self.request.headers[
-                        "Content-Type"
-                    ] = "application/x-www-form-urlencoded"
-                if self.request.decompress_response:
-                    self.request.headers["Accept-Encoding"] = "gzip"
-                req_path = (self.parsed.path or "/") + (
-                    ("?" + self.parsed.query) if self.parsed.query else ""
-                )
-                self.connection = self._create_connection(stream)
-                start_line = httputil.RequestStartLine(
-                    self.request.method, req_path, ""
-                )
-                self.connection.write_headers(start_line, self.request.headers)
-                if self.request.expect_100_continue:
-                    await self.connection.read_response(self)
-                else:
-                    await self._write_body(True)
-        except Exception:
-            if not self._handle_exception(*sys.exc_info()):
-                raise
-
-    def _get_ssl_options(
-        self, scheme: str
-    ) -> Union[None, Dict[str, Any], ssl.SSLContext]:
-        if scheme == "https":
-            if self.request.ssl_options is not None:
-                return self.request.ssl_options
-            # If we are using the defaults, don't construct a
-            # new SSLContext.
-            if (
-                self.request.validate_cert
-                and self.request.ca_certs is None
-                and self.request.client_cert is None
-                and self.request.client_key is None
-            ):
-                return _client_ssl_defaults
-            ssl_ctx = ssl.create_default_context(
-                ssl.Purpose.SERVER_AUTH, cafile=self.request.ca_certs
-            )
-            if not self.request.validate_cert:
-                ssl_ctx.check_hostname = False
-                ssl_ctx.verify_mode = ssl.CERT_NONE
-            if self.request.client_cert is not None:
-                ssl_ctx.load_cert_chain(
-                    self.request.client_cert, self.request.client_key
-                )
-            if hasattr(ssl, "OP_NO_COMPRESSION"):
-                # See netutil.ssl_options_to_context
-                ssl_ctx.options |= ssl.OP_NO_COMPRESSION
-            return ssl_ctx
-        return None
-
-    def _on_timeout(self, info: str = None) -> None:
-        """Timeout callback of _HTTPConnection instance.
-
-        Raise a `HTTPTimeoutError` when a timeout occurs.
-
-        :info string key: More detailed timeout information.
-        """
-        self._timeout = None
-        error_message = "Timeout {0}".format(info) if info else "Timeout"
-        if self.final_callback is not None:
-            self._handle_exception(
-                HTTPTimeoutError, HTTPTimeoutError(error_message), None
-            )
-
-    def _remove_timeout(self) -> None:
-        if self._timeout is not None:
-            self.io_loop.remove_timeout(self._timeout)
-            self._timeout = None
-
-    def _create_connection(self, stream: IOStream) -> HTTP1Connection:
-        stream.set_nodelay(True)
-        connection = HTTP1Connection(
-            stream,
-            True,
-            HTTP1ConnectionParameters(
-                no_keep_alive=True,
-                max_header_size=self.max_header_size,
-                max_body_size=self.max_body_size,
-                decompress=bool(self.request.decompress_response),
-            ),
-            self._sockaddr,
-        )
-        return connection
-
-    async def _write_body(self, start_read: bool) -> None:
-        if self.request.body is not None:
-            self.connection.write(self.request.body)
-        elif self.request.body_producer is not None:
-            fut = self.request.body_producer(self.connection.write)
-            if fut is not None:
-                await fut
-        self.connection.finish()
-        if start_read:
-            try:
-                await self.connection.read_response(self)
-            except StreamClosedError:
-                if not self._handle_exception(*sys.exc_info()):
-                    raise
-
-    def _release(self) -> None:
-        if self.release_callback is not None:
-            release_callback = self.release_callback
-            self.release_callback = None  # type: ignore
-            release_callback()
-
-    def _run_callback(self, response: HTTPResponse) -> None:
-        self._release()
-        if self.final_callback is not None:
-            final_callback = self.final_callback
-            self.final_callback = None  # type: ignore
-            self.io_loop.add_callback(final_callback, response)
-
-    def _handle_exception(
-        self,
-        typ: "Optional[Type[BaseException]]",
-        value: Optional[BaseException],
-        tb: Optional[TracebackType],
-    ) -> bool:
-        if self.final_callback:
-            self._remove_timeout()
-            if isinstance(value, StreamClosedError):
-                if value.real_error is None:
-                    value = HTTPStreamClosedError("Stream closed")
-                else:
-                    value = value.real_error
-            self._run_callback(
-                HTTPResponse(
-                    self.request,
-                    599,
-                    error=value,
-                    request_time=self.io_loop.time() - self.start_time,
-                    start_time=self.start_wall_time,
-                )
-            )
-
-            if hasattr(self, "stream"):
-                # TODO: this may cause a StreamClosedError to be raised
-                # by the connection's Future.  Should we cancel the
-                # connection more gracefully?
-                self.stream.close()
-            return True
-        else:
-            # If our callback has already been called, we are probably
-            # catching an exception that is not caused by us but rather
-            # some child of our callback. Rather than drop it on the floor,
-            # pass it along, unless it's just the stream being closed.
-            return isinstance(value, StreamClosedError)
-
-    def on_connection_close(self) -> None:
-        if self.final_callback is not None:
-            message = "Connection closed"
-            if self.stream.error:
-                raise self.stream.error
-            try:
-                raise HTTPStreamClosedError(message)
-            except HTTPStreamClosedError:
-                self._handle_exception(*sys.exc_info())
-
-    async def headers_received(
-        self,
-        first_line: Union[httputil.ResponseStartLine, httputil.RequestStartLine],
-        headers: httputil.HTTPHeaders,
-    ) -> None:
-        assert isinstance(first_line, httputil.ResponseStartLine)
-        if self.request.expect_100_continue and first_line.code == 100:
-            await self._write_body(False)
-            return
-        self.code = first_line.code
-        self.reason = first_line.reason
-        self.headers = headers
-
-        if self._should_follow_redirect():
-            return
-
-        if self.request.header_callback is not None:
-            # Reassemble the start line.
-            self.request.header_callback("%s %s %s\r\n" % first_line)
-            for k, v in self.headers.get_all():
-                self.request.header_callback("%s: %s\r\n" % (k, v))
-            self.request.header_callback("\r\n")
-
-    def _should_follow_redirect(self) -> bool:
-        if self.request.follow_redirects:
-            assert self.request.max_redirects is not None
-            return (
-                self.code in (301, 302, 303, 307, 308)
-                and self.request.max_redirects > 0
-                and self.headers is not None
-                and self.headers.get("Location") is not None
-            )
-        return False
-
-    def finish(self) -> None:
-        assert self.code is not None
-        data = b"".join(self.chunks)
-        self._remove_timeout()
-        original_request = getattr(self.request, "original_request", self.request)
-        if self._should_follow_redirect():
-            assert isinstance(self.request, _RequestProxy)
-            new_request = copy.copy(self.request.request)
-            new_request.url = urllib.parse.urljoin(
-                self.request.url, self.headers["Location"]
-            )
-            new_request.max_redirects = self.request.max_redirects - 1
-            del new_request.headers["Host"]
-            # https://tools.ietf.org/html/rfc7231#section-6.4
-            #
-            # The original HTTP spec said that after a 301 or 302
-            # redirect, the request method should be preserved.
-            # However, browsers implemented this by changing the
-            # method to GET, and the behavior stuck. 303 redirects
-            # always specified this POST-to-GET behavior (arguably 303
-            # redirects should change *all* requests to GET, but
-            # libcurl only does this for POST so we follow their
-            # example).
-            if self.code in (301, 302, 303) and self.request.method == "POST":
-                new_request.method = "GET"
-                new_request.body = None
-                for h in [
-                    "Content-Length",
-                    "Content-Type",
-                    "Content-Encoding",
-                    "Transfer-Encoding",
-                ]:
-                    try:
-                        del self.request.headers[h]
-                    except KeyError:
-                        pass
-            new_request.original_request = original_request
-            final_callback = self.final_callback
-            self.final_callback = None
-            self._release()
-            fut = self.client.fetch(new_request, raise_error=False)
-            fut.add_done_callback(lambda f: final_callback(f.result()))
-            self._on_end_request()
-            return
-        if self.request.streaming_callback:
-            buffer = BytesIO()
-        else:
-            buffer = BytesIO(data)  # TODO: don't require one big string?
-        response = HTTPResponse(
-            original_request,
-            self.code,
-            reason=getattr(self, "reason", None),
-            headers=self.headers,
-            request_time=self.io_loop.time() - self.start_time,
-            start_time=self.start_wall_time,
-            buffer=buffer,
-            effective_url=self.request.url,
-        )
-        self._run_callback(response)
-        self._on_end_request()
-
-    def _on_end_request(self) -> None:
-        self.stream.close()
-
-    def data_received(self, chunk: bytes) -> None:
-        if self._should_follow_redirect():
-            # We're going to follow a redirect so just discard the body.
-            return
-        if self.request.streaming_callback is not None:
-            self.request.streaming_callback(chunk)
-        else:
-            self.chunks.append(chunk)
-
-
-if __name__ == "__main__":
-    AsyncHTTPClient.configure(SimpleAsyncHTTPClient)
-    main()
diff --git a/venv/lib/python3.7/site-packages/tornado/tcpclient.py b/venv/lib/python3.7/site-packages/tornado/tcpclient.py
deleted file mode 100644
index 9fe6971..0000000
--- a/venv/lib/python3.7/site-packages/tornado/tcpclient.py
+++ /dev/null
@@ -1,334 +0,0 @@
-#
-# Copyright 2014 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-"""A non-blocking TCP connection factory.
-"""
-
-import functools
-import socket
-import numbers
-import datetime
-import ssl
-
-from tornado.concurrent import Future, future_add_done_callback
-from tornado.ioloop import IOLoop
-from tornado.iostream import IOStream
-from tornado import gen
-from tornado.netutil import Resolver
-from tornado.platform.auto import set_close_exec
-from tornado.gen import TimeoutError
-
-import typing
-from typing import Any, Union, Dict, Tuple, List, Callable, Iterator
-
-if typing.TYPE_CHECKING:
-    from typing import Optional, Set  # noqa: F401
-
-_INITIAL_CONNECT_TIMEOUT = 0.3
-
-
-class _Connector(object):
-    """A stateless implementation of the "Happy Eyeballs" algorithm.
-
-    "Happy Eyeballs" is documented in RFC6555 as the recommended practice
-    for when both IPv4 and IPv6 addresses are available.
-
-    In this implementation, we partition the addresses by family, and
-    make the first connection attempt to whichever address was
-    returned first by ``getaddrinfo``.  If that connection fails or
-    times out, we begin a connection in parallel to the first address
-    of the other family.  If there are additional failures we retry
-    with other addresses, keeping one connection attempt per family
-    in flight at a time.
-
-    http://tools.ietf.org/html/rfc6555
-
-    """
-
-    def __init__(
-        self,
-        addrinfo: List[Tuple],
-        connect: Callable[
-            [socket.AddressFamily, Tuple], Tuple[IOStream, "Future[IOStream]"]
-        ],
-    ) -> None:
-        self.io_loop = IOLoop.current()
-        self.connect = connect
-
-        self.future = (
-            Future()
-        )  # type: Future[Tuple[socket.AddressFamily, Any, IOStream]]
-        self.timeout = None  # type: Optional[object]
-        self.connect_timeout = None  # type: Optional[object]
-        self.last_error = None  # type: Optional[Exception]
-        self.remaining = len(addrinfo)
-        self.primary_addrs, self.secondary_addrs = self.split(addrinfo)
-        self.streams = set()  # type: Set[IOStream]
-
-    @staticmethod
-    def split(
-        addrinfo: List[Tuple]
-    ) -> Tuple[
-        List[Tuple[socket.AddressFamily, Tuple]],
-        List[Tuple[socket.AddressFamily, Tuple]],
-    ]:
-        """Partition the ``addrinfo`` list by address family.
-
-        Returns two lists.  The first list contains the first entry from
-        ``addrinfo`` and all others with the same family, and the
-        second list contains all other addresses (normally one list will
-        be AF_INET and the other AF_INET6, although non-standard resolvers
-        may return additional families).
-        """
-        primary = []
-        secondary = []
-        primary_af = addrinfo[0][0]
-        for af, addr in addrinfo:
-            if af == primary_af:
-                primary.append((af, addr))
-            else:
-                secondary.append((af, addr))
-        return primary, secondary
-
-    def start(
-        self,
-        timeout: float = _INITIAL_CONNECT_TIMEOUT,
-        connect_timeout: Union[float, datetime.timedelta] = None,
-    ) -> "Future[Tuple[socket.AddressFamily, Any, IOStream]]":
-        self.try_connect(iter(self.primary_addrs))
-        self.set_timeout(timeout)
-        if connect_timeout is not None:
-            self.set_connect_timeout(connect_timeout)
-        return self.future
-
-    def try_connect(self, addrs: Iterator[Tuple[socket.AddressFamily, Tuple]]) -> None:
-        try:
-            af, addr = next(addrs)
-        except StopIteration:
-            # We've reached the end of our queue, but the other queue
-            # might still be working.  Send a final error on the future
-            # only when both queues are finished.
-            if self.remaining == 0 and not self.future.done():
-                self.future.set_exception(
-                    self.last_error or IOError("connection failed")
-                )
-            return
-        stream, future = self.connect(af, addr)
-        self.streams.add(stream)
-        future_add_done_callback(
-            future, functools.partial(self.on_connect_done, addrs, af, addr)
-        )
-
-    def on_connect_done(
-        self,
-        addrs: Iterator[Tuple[socket.AddressFamily, Tuple]],
-        af: socket.AddressFamily,
-        addr: Tuple,
-        future: "Future[IOStream]",
-    ) -> None:
-        self.remaining -= 1
-        try:
-            stream = future.result()
-        except Exception as e:
-            if self.future.done():
-                return
-            # Error: try again (but remember what happened so we have an
-            # error to raise in the end)
-            self.last_error = e
-            self.try_connect(addrs)
-            if self.timeout is not None:
-                # If the first attempt failed, don't wait for the
-                # timeout to try an address from the secondary queue.
-                self.io_loop.remove_timeout(self.timeout)
-                self.on_timeout()
-            return
-        self.clear_timeouts()
-        if self.future.done():
-            # This is a late arrival; just drop it.
-            stream.close()
-        else:
-            self.streams.discard(stream)
-            self.future.set_result((af, addr, stream))
-            self.close_streams()
-
-    def set_timeout(self, timeout: float) -> None:
-        self.timeout = self.io_loop.add_timeout(
-            self.io_loop.time() + timeout, self.on_timeout
-        )
-
-    def on_timeout(self) -> None:
-        self.timeout = None
-        if not self.future.done():
-            self.try_connect(iter(self.secondary_addrs))
-
-    def clear_timeout(self) -> None:
-        if self.timeout is not None:
-            self.io_loop.remove_timeout(self.timeout)
-
-    def set_connect_timeout(
-        self, connect_timeout: Union[float, datetime.timedelta]
-    ) -> None:
-        self.connect_timeout = self.io_loop.add_timeout(
-            connect_timeout, self.on_connect_timeout
-        )
-
-    def on_connect_timeout(self) -> None:
-        if not self.future.done():
-            self.future.set_exception(TimeoutError())
-        self.close_streams()
-
-    def clear_timeouts(self) -> None:
-        if self.timeout is not None:
-            self.io_loop.remove_timeout(self.timeout)
-        if self.connect_timeout is not None:
-            self.io_loop.remove_timeout(self.connect_timeout)
-
-    def close_streams(self) -> None:
-        for stream in self.streams:
-            stream.close()
-
-
-class TCPClient(object):
-    """A non-blocking TCP connection factory.
-
-    .. versionchanged:: 5.0
-       The ``io_loop`` argument (deprecated since version 4.1) has been removed.
-    """
-
-    def __init__(self, resolver: Resolver = None) -> None:
-        if resolver is not None:
-            self.resolver = resolver
-            self._own_resolver = False
-        else:
-            self.resolver = Resolver()
-            self._own_resolver = True
-
-    def close(self) -> None:
-        if self._own_resolver:
-            self.resolver.close()
-
-    async def connect(
-        self,
-        host: str,
-        port: int,
-        af: socket.AddressFamily = socket.AF_UNSPEC,
-        ssl_options: Union[Dict[str, Any], ssl.SSLContext] = None,
-        max_buffer_size: int = None,
-        source_ip: str = None,
-        source_port: int = None,
-        timeout: Union[float, datetime.timedelta] = None,
-    ) -> IOStream:
-        """Connect to the given host and port.
-
-        Asynchronously returns an `.IOStream` (or `.SSLIOStream` if
-        ``ssl_options`` is not None).
-
-        Using the ``source_ip`` kwarg, one can specify the source
-        IP address to use when establishing the connection.
-        In case the user needs to resolve and
-        use a specific interface, it has to be handled outside
-        of Tornado as this depends very much on the platform.
-
-        Raises `TimeoutError` if the input future does not complete before
-        ``timeout``, which may be specified in any form allowed by
-        `.IOLoop.add_timeout` (i.e. a `datetime.timedelta` or an absolute time
-        relative to `.IOLoop.time`)
-
-        Similarly, when the user requires a certain source port, it can
-        be specified using the ``source_port`` arg.
-
-        .. versionchanged:: 4.5
-           Added the ``source_ip`` and ``source_port`` arguments.
-
-        .. versionchanged:: 5.0
-           Added the ``timeout`` argument.
-        """
-        if timeout is not None:
-            if isinstance(timeout, numbers.Real):
-                timeout = IOLoop.current().time() + timeout
-            elif isinstance(timeout, datetime.timedelta):
-                timeout = IOLoop.current().time() + timeout.total_seconds()
-            else:
-                raise TypeError("Unsupported timeout %r" % timeout)
-        if timeout is not None:
-            addrinfo = await gen.with_timeout(
-                timeout, self.resolver.resolve(host, port, af)
-            )
-        else:
-            addrinfo = await self.resolver.resolve(host, port, af)
-        connector = _Connector(
-            addrinfo,
-            functools.partial(
-                self._create_stream,
-                max_buffer_size,
-                source_ip=source_ip,
-                source_port=source_port,
-            ),
-        )
-        af, addr, stream = await connector.start(connect_timeout=timeout)
-        # TODO: For better performance we could cache the (af, addr)
-        # information here and re-use it on subsequent connections to
-        # the same host. (http://tools.ietf.org/html/rfc6555#section-4.2)
-        if ssl_options is not None:
-            if timeout is not None:
-                stream = await gen.with_timeout(
-                    timeout,
-                    stream.start_tls(
-                        False, ssl_options=ssl_options, server_hostname=host
-                    ),
-                )
-            else:
-                stream = await stream.start_tls(
-                    False, ssl_options=ssl_options, server_hostname=host
-                )
-        return stream
-
-    def _create_stream(
-        self,
-        max_buffer_size: int,
-        af: socket.AddressFamily,
-        addr: Tuple,
-        source_ip: str = None,
-        source_port: int = None,
-    ) -> Tuple[IOStream, "Future[IOStream]"]:
-        # Always connect in plaintext; we'll convert to ssl if necessary
-        # after one connection has completed.
-        source_port_bind = source_port if isinstance(source_port, int) else 0
-        source_ip_bind = source_ip
-        if source_port_bind and not source_ip:
-            # User required a specific port, but did not specify
-            # a certain source IP, will bind to the default loopback.
-            source_ip_bind = "::1" if af == socket.AF_INET6 else "127.0.0.1"
-            # Trying to use the same address family as the requested af socket:
-            # - 127.0.0.1 for IPv4
-            # - ::1 for IPv6
-        socket_obj = socket.socket(af)
-        set_close_exec(socket_obj.fileno())
-        if source_port_bind or source_ip_bind:
-            # If the user requires binding also to a specific IP/port.
-            try:
-                socket_obj.bind((source_ip_bind, source_port_bind))
-            except socket.error:
-                socket_obj.close()
-                # Fail loudly if unable to use the IP/port.
-                raise
-        try:
-            stream = IOStream(socket_obj, max_buffer_size=max_buffer_size)
-        except socket.error as e:
-            fu = Future()  # type: Future[IOStream]
-            fu.set_exception(e)
-            return stream, fu
-        else:
-            return stream, stream.connect(addr)
diff --git a/venv/lib/python3.7/site-packages/tornado/tcpserver.py b/venv/lib/python3.7/site-packages/tornado/tcpserver.py
deleted file mode 100644
index eaf08b2..0000000
--- a/venv/lib/python3.7/site-packages/tornado/tcpserver.py
+++ /dev/null
@@ -1,330 +0,0 @@
-#
-# Copyright 2011 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-"""A non-blocking, single-threaded TCP server."""
-
-import errno
-import os
-import socket
-import ssl
-
-from tornado import gen
-from tornado.log import app_log
-from tornado.ioloop import IOLoop
-from tornado.iostream import IOStream, SSLIOStream
-from tornado.netutil import bind_sockets, add_accept_handler, ssl_wrap_socket
-from tornado import process
-from tornado.util import errno_from_exception
-
-import typing
-from typing import Union, Dict, Any, Iterable, Optional, Awaitable
-
-if typing.TYPE_CHECKING:
-    from typing import Callable, List  # noqa: F401
-
-
-class TCPServer(object):
-    r"""A non-blocking, single-threaded TCP server.
-
-    To use `TCPServer`, define a subclass which overrides the `handle_stream`
-    method. For example, a simple echo server could be defined like this::
-
-      from tornado.tcpserver import TCPServer
-      from tornado.iostream import StreamClosedError
-      from tornado import gen
-
-      class EchoServer(TCPServer):
-          async def handle_stream(self, stream, address):
-              while True:
-                  try:
-                      data = await stream.read_until(b"\n")
-                      await stream.write(data)
-                  except StreamClosedError:
-                      break
-
-    To make this server serve SSL traffic, send the ``ssl_options`` keyword
-    argument with an `ssl.SSLContext` object. For compatibility with older
-    versions of Python ``ssl_options`` may also be a dictionary of keyword
-    arguments for the `ssl.wrap_socket` method.::
-
-       ssl_ctx = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
-       ssl_ctx.load_cert_chain(os.path.join(data_dir, "mydomain.crt"),
-                               os.path.join(data_dir, "mydomain.key"))
-       TCPServer(ssl_options=ssl_ctx)
-
-    `TCPServer` initialization follows one of three patterns:
-
-    1. `listen`: simple single-process::
-
-            server = TCPServer()
-            server.listen(8888)
-            IOLoop.current().start()
-
-    2. `bind`/`start`: simple multi-process::
-
-            server = TCPServer()
-            server.bind(8888)
-            server.start(0)  # Forks multiple sub-processes
-            IOLoop.current().start()
-
-       When using this interface, an `.IOLoop` must *not* be passed
-       to the `TCPServer` constructor.  `start` will always start
-       the server on the default singleton `.IOLoop`.
-
-    3. `add_sockets`: advanced multi-process::
-
-            sockets = bind_sockets(8888)
-            tornado.process.fork_processes(0)
-            server = TCPServer()
-            server.add_sockets(sockets)
-            IOLoop.current().start()
-
-       The `add_sockets` interface is more complicated, but it can be
-       used with `tornado.process.fork_processes` to give you more
-       flexibility in when the fork happens.  `add_sockets` can
-       also be used in single-process servers if you want to create
-       your listening sockets in some way other than
-       `~tornado.netutil.bind_sockets`.
-
-    .. versionadded:: 3.1
-       The ``max_buffer_size`` argument.
-
-    .. versionchanged:: 5.0
-       The ``io_loop`` argument has been removed.
-    """
-
-    def __init__(
-        self,
-        ssl_options: Union[Dict[str, Any], ssl.SSLContext] = None,
-        max_buffer_size: int = None,
-        read_chunk_size: int = None,
-    ) -> None:
-        self.ssl_options = ssl_options
-        self._sockets = {}  # type: Dict[int, socket.socket]
-        self._handlers = {}  # type: Dict[int, Callable[[], None]]
-        self._pending_sockets = []  # type: List[socket.socket]
-        self._started = False
-        self._stopped = False
-        self.max_buffer_size = max_buffer_size
-        self.read_chunk_size = read_chunk_size
-
-        # Verify the SSL options. Otherwise we don't get errors until clients
-        # connect. This doesn't verify that the keys are legitimate, but
-        # the SSL module doesn't do that until there is a connected socket
-        # which seems like too much work
-        if self.ssl_options is not None and isinstance(self.ssl_options, dict):
-            # Only certfile is required: it can contain both keys
-            if "certfile" not in self.ssl_options:
-                raise KeyError('missing key "certfile" in ssl_options')
-
-            if not os.path.exists(self.ssl_options["certfile"]):
-                raise ValueError(
-                    'certfile "%s" does not exist' % self.ssl_options["certfile"]
-                )
-            if "keyfile" in self.ssl_options and not os.path.exists(
-                self.ssl_options["keyfile"]
-            ):
-                raise ValueError(
-                    'keyfile "%s" does not exist' % self.ssl_options["keyfile"]
-                )
-
-    def listen(self, port: int, address: str = "") -> None:
-        """Starts accepting connections on the given port.
-
-        This method may be called more than once to listen on multiple ports.
-        `listen` takes effect immediately; it is not necessary to call
-        `TCPServer.start` afterwards.  It is, however, necessary to start
-        the `.IOLoop`.
-        """
-        sockets = bind_sockets(port, address=address)
-        self.add_sockets(sockets)
-
-    def add_sockets(self, sockets: Iterable[socket.socket]) -> None:
-        """Makes this server start accepting connections on the given sockets.
-
-        The ``sockets`` parameter is a list of socket objects such as
-        those returned by `~tornado.netutil.bind_sockets`.
-        `add_sockets` is typically used in combination with that
-        method and `tornado.process.fork_processes` to provide greater
-        control over the initialization of a multi-process server.
-        """
-        for sock in sockets:
-            self._sockets[sock.fileno()] = sock
-            self._handlers[sock.fileno()] = add_accept_handler(
-                sock, self._handle_connection
-            )
-
-    def add_socket(self, socket: socket.socket) -> None:
-        """Singular version of `add_sockets`.  Takes a single socket object."""
-        self.add_sockets([socket])
-
-    def bind(
-        self,
-        port: int,
-        address: str = None,
-        family: socket.AddressFamily = socket.AF_UNSPEC,
-        backlog: int = 128,
-        reuse_port: bool = False,
-    ) -> None:
-        """Binds this server to the given port on the given address.
-
-        To start the server, call `start`. If you want to run this server
-        in a single process, you can call `listen` as a shortcut to the
-        sequence of `bind` and `start` calls.
-
-        Address may be either an IP address or hostname.  If it's a hostname,
-        the server will listen on all IP addresses associated with the
-        name.  Address may be an empty string or None to listen on all
-        available interfaces.  Family may be set to either `socket.AF_INET`
-        or `socket.AF_INET6` to restrict to IPv4 or IPv6 addresses, otherwise
-        both will be used if available.
-
-        The ``backlog`` argument has the same meaning as for
-        `socket.listen <socket.socket.listen>`. The ``reuse_port`` argument
-        has the same meaning as for `.bind_sockets`.
-
-        This method may be called multiple times prior to `start` to listen
-        on multiple ports or interfaces.
-
-        .. versionchanged:: 4.4
-           Added the ``reuse_port`` argument.
-        """
-        sockets = bind_sockets(
-            port, address=address, family=family, backlog=backlog, reuse_port=reuse_port
-        )
-        if self._started:
-            self.add_sockets(sockets)
-        else:
-            self._pending_sockets.extend(sockets)
-
-    def start(self, num_processes: Optional[int] = 1, max_restarts: int = None) -> None:
-        """Starts this server in the `.IOLoop`.
-
-        By default, we run the server in this process and do not fork any
-        additional child process.
-
-        If num_processes is ``None`` or <= 0, we detect the number of cores
-        available on this machine and fork that number of child
-        processes. If num_processes is given and > 1, we fork that
-        specific number of sub-processes.
-
-        Since we use processes and not threads, there is no shared memory
-        between any server code.
-
-        Note that multiple processes are not compatible with the autoreload
-        module (or the ``autoreload=True`` option to `tornado.web.Application`
-        which defaults to True when ``debug=True``).
-        When using multiple processes, no IOLoops can be created or
-        referenced until after the call to ``TCPServer.start(n)``.
-
-        The ``max_restarts`` argument is passed to `.fork_processes`.
-
-        .. versionchanged:: 6.0
-
-           Added ``max_restarts`` argument.
-        """
-        assert not self._started
-        self._started = True
-        if num_processes != 1:
-            process.fork_processes(num_processes, max_restarts)
-        sockets = self._pending_sockets
-        self._pending_sockets = []
-        self.add_sockets(sockets)
-
-    def stop(self) -> None:
-        """Stops listening for new connections.
-
-        Requests currently in progress may still continue after the
-        server is stopped.
-        """
-        if self._stopped:
-            return
-        self._stopped = True
-        for fd, sock in self._sockets.items():
-            assert sock.fileno() == fd
-            # Unregister socket from IOLoop
-            self._handlers.pop(fd)()
-            sock.close()
-
-    def handle_stream(
-        self, stream: IOStream, address: tuple
-    ) -> Optional[Awaitable[None]]:
-        """Override to handle a new `.IOStream` from an incoming connection.
-
-        This method may be a coroutine; if so any exceptions it raises
-        asynchronously will be logged. Accepting of incoming connections
-        will not be blocked by this coroutine.
-
-        If this `TCPServer` is configured for SSL, ``handle_stream``
-        may be called before the SSL handshake has completed. Use
-        `.SSLIOStream.wait_for_handshake` if you need to verify the client's
-        certificate or use NPN/ALPN.
-
-        .. versionchanged:: 4.2
-           Added the option for this method to be a coroutine.
-        """
-        raise NotImplementedError()
-
-    def _handle_connection(self, connection: socket.socket, address: Any) -> None:
-        if self.ssl_options is not None:
-            assert ssl, "Python 2.6+ and OpenSSL required for SSL"
-            try:
-                connection = ssl_wrap_socket(
-                    connection,
-                    self.ssl_options,
-                    server_side=True,
-                    do_handshake_on_connect=False,
-                )
-            except ssl.SSLError as err:
-                if err.args[0] == ssl.SSL_ERROR_EOF:
-                    return connection.close()
-                else:
-                    raise
-            except socket.error as err:
-                # If the connection is closed immediately after it is created
-                # (as in a port scan), we can get one of several errors.
-                # wrap_socket makes an internal call to getpeername,
-                # which may return either EINVAL (Mac OS X) or ENOTCONN
-                # (Linux).  If it returns ENOTCONN, this error is
-                # silently swallowed by the ssl module, so we need to
-                # catch another error later on (AttributeError in
-                # SSLIOStream._do_ssl_handshake).
-                # To test this behavior, try nmap with the -sT flag.
-                # https://github.com/tornadoweb/tornado/pull/750
-                if errno_from_exception(err) in (errno.ECONNABORTED, errno.EINVAL):
-                    return connection.close()
-                else:
-                    raise
-        try:
-            if self.ssl_options is not None:
-                stream = SSLIOStream(
-                    connection,
-                    max_buffer_size=self.max_buffer_size,
-                    read_chunk_size=self.read_chunk_size,
-                )  # type: IOStream
-            else:
-                stream = IOStream(
-                    connection,
-                    max_buffer_size=self.max_buffer_size,
-                    read_chunk_size=self.read_chunk_size,
-                )
-
-            future = self.handle_stream(stream, address)
-            if future is not None:
-                IOLoop.current().add_future(
-                    gen.convert_yielded(future), lambda f: f.result()
-                )
-        except Exception:
-            app_log.error("Error in connection callback", exc_info=True)
diff --git a/venv/lib/python3.7/site-packages/tornado/template.py b/venv/lib/python3.7/site-packages/tornado/template.py
deleted file mode 100644
index 1433dfa..0000000
--- a/venv/lib/python3.7/site-packages/tornado/template.py
+++ /dev/null
@@ -1,1043 +0,0 @@
-#
-# Copyright 2009 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-"""A simple template system that compiles templates to Python code.
-
-Basic usage looks like::
-
-    t = template.Template("<html>{{ myvalue }}</html>")
-    print(t.generate(myvalue="XXX"))
-
-`Loader` is a class that loads templates from a root directory and caches
-the compiled templates::
-
-    loader = template.Loader("/home/btaylor")
-    print(loader.load("test.html").generate(myvalue="XXX"))
-
-We compile all templates to raw Python. Error-reporting is currently... uh,
-interesting. Syntax for the templates::
-
-    ### base.html
-    <html>
-      <head>
-        <title>{% block title %}Default title{% end %}</title>
-      </head>
-      <body>
-        <ul>
-          {% for student in students %}
-            {% block student %}
-              <li>{{ escape(student.name) }}</li>
-            {% end %}
-          {% end %}
-        </ul>
-      </body>
-    </html>
-
-    ### bold.html
-    {% extends "base.html" %}
-
-    {% block title %}A bolder title{% end %}
-
-    {% block student %}
-      <li><span style="bold">{{ escape(student.name) }}</span></li>
-    {% end %}
-
-Unlike most other template systems, we do not put any restrictions on the
-expressions you can include in your statements. ``if`` and ``for`` blocks get
-translated exactly into Python, so you can do complex expressions like::
-
-   {% for student in [p for p in people if p.student and p.age > 23] %}
-     <li>{{ escape(student.name) }}</li>
-   {% end %}
-
-Translating directly to Python means you can apply functions to expressions
-easily, like the ``escape()`` function in the examples above. You can pass
-functions in to your template just like any other variable
-(In a `.RequestHandler`, override `.RequestHandler.get_template_namespace`)::
-
-   ### Python code
-   def add(x, y):
-      return x + y
-   template.execute(add=add)
-
-   ### The template
-   {{ add(1, 2) }}
-
-We provide the functions `escape() <.xhtml_escape>`, `.url_escape()`,
-`.json_encode()`, and `.squeeze()` to all templates by default.
-
-Typical applications do not create `Template` or `Loader` instances by
-hand, but instead use the `~.RequestHandler.render` and
-`~.RequestHandler.render_string` methods of
-`tornado.web.RequestHandler`, which load templates automatically based
-on the ``template_path`` `.Application` setting.
-
-Variable names beginning with ``_tt_`` are reserved by the template
-system and should not be used by application code.
-
-Syntax Reference
-----------------
-
-Template expressions are surrounded by double curly braces: ``{{ ... }}``.
-The contents may be any python expression, which will be escaped according
-to the current autoescape setting and inserted into the output.  Other
-template directives use ``{% %}``.
-
-To comment out a section so that it is omitted from the output, surround it
-with ``{# ... #}``.
-
-These tags may be escaped as ``{{!``, ``{%!``, and ``{#!``
-if you need to include a literal ``{{``, ``{%``, or ``{#`` in the output.
-
-
-``{% apply *function* %}...{% end %}``
-    Applies a function to the output of all template code between ``apply``
-    and ``end``::
-
-        {% apply linkify %}{{name}} said: {{message}}{% end %}
-
-    Note that as an implementation detail apply blocks are implemented
-    as nested functions and thus may interact strangely with variables
-    set via ``{% set %}``, or the use of ``{% break %}`` or ``{% continue %}``
-    within loops.
-
-``{% autoescape *function* %}``
-    Sets the autoescape mode for the current file.  This does not affect
-    other files, even those referenced by ``{% include %}``.  Note that
-    autoescaping can also be configured globally, at the `.Application`
-    or `Loader`.::
-
-        {% autoescape xhtml_escape %}
-        {% autoescape None %}
-
-``{% block *name* %}...{% end %}``
-    Indicates a named, replaceable block for use with ``{% extends %}``.
-    Blocks in the parent template will be replaced with the contents of
-    the same-named block in a child template.::
-
-        <!-- base.html -->
-        <title>{% block title %}Default title{% end %}</title>
-
-        <!-- mypage.html -->
-        {% extends "base.html" %}
-        {% block title %}My page title{% end %}
-
-``{% comment ... %}``
-    A comment which will be removed from the template output.  Note that
-    there is no ``{% end %}`` tag; the comment goes from the word ``comment``
-    to the closing ``%}`` tag.
-
-``{% extends *filename* %}``
-    Inherit from another template.  Templates that use ``extends`` should
-    contain one or more ``block`` tags to replace content from the parent
-    template.  Anything in the child template not contained in a ``block``
-    tag will be ignored.  For an example, see the ``{% block %}`` tag.
-
-``{% for *var* in *expr* %}...{% end %}``
-    Same as the python ``for`` statement.  ``{% break %}`` and
-    ``{% continue %}`` may be used inside the loop.
-
-``{% from *x* import *y* %}``
-    Same as the python ``import`` statement.
-
-``{% if *condition* %}...{% elif *condition* %}...{% else %}...{% end %}``
-    Conditional statement - outputs the first section whose condition is
-    true.  (The ``elif`` and ``else`` sections are optional)
-
-``{% import *module* %}``
-    Same as the python ``import`` statement.
-
-``{% include *filename* %}``
-    Includes another template file.  The included file can see all the local
-    variables as if it were copied directly to the point of the ``include``
-    directive (the ``{% autoescape %}`` directive is an exception).
-    Alternately, ``{% module Template(filename, **kwargs) %}`` may be used
-    to include another template with an isolated namespace.
-
-``{% module *expr* %}``
-    Renders a `~tornado.web.UIModule`.  The output of the ``UIModule`` is
-    not escaped::
-
-        {% module Template("foo.html", arg=42) %}
-
-    ``UIModules`` are a feature of the `tornado.web.RequestHandler`
-    class (and specifically its ``render`` method) and will not work
-    when the template system is used on its own in other contexts.
-
-``{% raw *expr* %}``
-    Outputs the result of the given expression without autoescaping.
-
-``{% set *x* = *y* %}``
-    Sets a local variable.
-
-``{% try %}...{% except %}...{% else %}...{% finally %}...{% end %}``
-    Same as the python ``try`` statement.
-
-``{% while *condition* %}... {% end %}``
-    Same as the python ``while`` statement.  ``{% break %}`` and
-    ``{% continue %}`` may be used inside the loop.
-
-``{% whitespace *mode* %}``
-    Sets the whitespace mode for the remainder of the current file
-    (or until the next ``{% whitespace %}`` directive). See
-    `filter_whitespace` for available options. New in Tornado 4.3.
-"""
-
-import datetime
-from io import StringIO
-import linecache
-import os.path
-import posixpath
-import re
-import threading
-
-from tornado import escape
-from tornado.log import app_log
-from tornado.util import ObjectDict, exec_in, unicode_type
-
-from typing import Any, Union, Callable, List, Dict, Iterable, Optional, TextIO
-import typing
-
-if typing.TYPE_CHECKING:
-    from typing import Tuple, ContextManager  # noqa: F401
-
-_DEFAULT_AUTOESCAPE = "xhtml_escape"
-
-
-class _UnsetMarker:
-    pass
-
-
-_UNSET = _UnsetMarker()
-
-
-def filter_whitespace(mode: str, text: str) -> str:
-    """Transform whitespace in ``text`` according to ``mode``.
-
-    Available modes are:
-
-    * ``all``: Return all whitespace unmodified.
-    * ``single``: Collapse consecutive whitespace with a single whitespace
-      character, preserving newlines.
-    * ``oneline``: Collapse all runs of whitespace into a single space
-      character, removing all newlines in the process.
-
-    .. versionadded:: 4.3
-    """
-    if mode == "all":
-        return text
-    elif mode == "single":
-        text = re.sub(r"([\t ]+)", " ", text)
-        text = re.sub(r"(\s*\n\s*)", "\n", text)
-        return text
-    elif mode == "oneline":
-        return re.sub(r"(\s+)", " ", text)
-    else:
-        raise Exception("invalid whitespace mode %s" % mode)
-
-
-class Template(object):
-    """A compiled template.
-
-    We compile into Python from the given template_string. You can generate
-    the template from variables with generate().
-    """
-
-    # note that the constructor's signature is not extracted with
-    # autodoc because _UNSET looks like garbage.  When changing
-    # this signature update website/sphinx/template.rst too.
-    def __init__(
-        self,
-        template_string: Union[str, bytes],
-        name: str = "<string>",
-        loader: "BaseLoader" = None,
-        compress_whitespace: Union[bool, _UnsetMarker] = _UNSET,
-        autoescape: Union[str, _UnsetMarker] = _UNSET,
-        whitespace: str = None,
-    ) -> None:
-        """Construct a Template.
-
-        :arg str template_string: the contents of the template file.
-        :arg str name: the filename from which the template was loaded
-            (used for error message).
-        :arg tornado.template.BaseLoader loader: the `~tornado.template.BaseLoader` responsible
-            for this template, used to resolve ``{% include %}`` and ``{% extend %}`` directives.
-        :arg bool compress_whitespace: Deprecated since Tornado 4.3.
-            Equivalent to ``whitespace="single"`` if true and
-            ``whitespace="all"`` if false.
-        :arg str autoescape: The name of a function in the template
-            namespace, or ``None`` to disable escaping by default.
-        :arg str whitespace: A string specifying treatment of whitespace;
-            see `filter_whitespace` for options.
-
-        .. versionchanged:: 4.3
-           Added ``whitespace`` parameter; deprecated ``compress_whitespace``.
-        """
-        self.name = escape.native_str(name)
-
-        if compress_whitespace is not _UNSET:
-            # Convert deprecated compress_whitespace (bool) to whitespace (str).
-            if whitespace is not None:
-                raise Exception("cannot set both whitespace and compress_whitespace")
-            whitespace = "single" if compress_whitespace else "all"
-        if whitespace is None:
-            if loader and loader.whitespace:
-                whitespace = loader.whitespace
-            else:
-                # Whitespace defaults by filename.
-                if name.endswith(".html") or name.endswith(".js"):
-                    whitespace = "single"
-                else:
-                    whitespace = "all"
-        # Validate the whitespace setting.
-        assert whitespace is not None
-        filter_whitespace(whitespace, "")
-
-        if not isinstance(autoescape, _UnsetMarker):
-            self.autoescape = autoescape  # type: Optional[str]
-        elif loader:
-            self.autoescape = loader.autoescape
-        else:
-            self.autoescape = _DEFAULT_AUTOESCAPE
-
-        self.namespace = loader.namespace if loader else {}
-        reader = _TemplateReader(name, escape.native_str(template_string), whitespace)
-        self.file = _File(self, _parse(reader, self))
-        self.code = self._generate_python(loader)
-        self.loader = loader
-        try:
-            # Under python2.5, the fake filename used here must match
-            # the module name used in __name__ below.
-            # The dont_inherit flag prevents template.py's future imports
-            # from being applied to the generated code.
-            self.compiled = compile(
-                escape.to_unicode(self.code),
-                "%s.generated.py" % self.name.replace(".", "_"),
-                "exec",
-                dont_inherit=True,
-            )
-        except Exception:
-            formatted_code = _format_code(self.code).rstrip()
-            app_log.error("%s code:\n%s", self.name, formatted_code)
-            raise
-
-    def generate(self, **kwargs: Any) -> bytes:
-        """Generate this template with the given arguments."""
-        namespace = {
-            "escape": escape.xhtml_escape,
-            "xhtml_escape": escape.xhtml_escape,
-            "url_escape": escape.url_escape,
-            "json_encode": escape.json_encode,
-            "squeeze": escape.squeeze,
-            "linkify": escape.linkify,
-            "datetime": datetime,
-            "_tt_utf8": escape.utf8,  # for internal use
-            "_tt_string_types": (unicode_type, bytes),
-            # __name__ and __loader__ allow the traceback mechanism to find
-            # the generated source code.
-            "__name__": self.name.replace(".", "_"),
-            "__loader__": ObjectDict(get_source=lambda name: self.code),
-        }
-        namespace.update(self.namespace)
-        namespace.update(kwargs)
-        exec_in(self.compiled, namespace)
-        execute = typing.cast(Callable[[], bytes], namespace["_tt_execute"])
-        # Clear the traceback module's cache of source data now that
-        # we've generated a new template (mainly for this module's
-        # unittests, where different tests reuse the same name).
-        linecache.clearcache()
-        return execute()
-
-    def _generate_python(self, loader: Optional["BaseLoader"]) -> str:
-        buffer = StringIO()
-        try:
-            # named_blocks maps from names to _NamedBlock objects
-            named_blocks = {}  # type: Dict[str, _NamedBlock]
-            ancestors = self._get_ancestors(loader)
-            ancestors.reverse()
-            for ancestor in ancestors:
-                ancestor.find_named_blocks(loader, named_blocks)
-            writer = _CodeWriter(buffer, named_blocks, loader, ancestors[0].template)
-            ancestors[0].generate(writer)
-            return buffer.getvalue()
-        finally:
-            buffer.close()
-
-    def _get_ancestors(self, loader: Optional["BaseLoader"]) -> List["_File"]:
-        ancestors = [self.file]
-        for chunk in self.file.body.chunks:
-            if isinstance(chunk, _ExtendsBlock):
-                if not loader:
-                    raise ParseError(
-                        "{% extends %} block found, but no " "template loader"
-                    )
-                template = loader.load(chunk.name, self.name)
-                ancestors.extend(template._get_ancestors(loader))
-        return ancestors
-
-
-class BaseLoader(object):
-    """Base class for template loaders.
-
-    You must use a template loader to use template constructs like
-    ``{% extends %}`` and ``{% include %}``. The loader caches all
-    templates after they are loaded the first time.
-    """
-
-    def __init__(
-        self,
-        autoescape: str = _DEFAULT_AUTOESCAPE,
-        namespace: Dict[str, Any] = None,
-        whitespace: str = None,
-    ) -> None:
-        """Construct a template loader.
-
-        :arg str autoescape: The name of a function in the template
-            namespace, such as "xhtml_escape", or ``None`` to disable
-            autoescaping by default.
-        :arg dict namespace: A dictionary to be added to the default template
-            namespace, or ``None``.
-        :arg str whitespace: A string specifying default behavior for
-            whitespace in templates; see `filter_whitespace` for options.
-            Default is "single" for files ending in ".html" and ".js" and
-            "all" for other files.
-
-        .. versionchanged:: 4.3
-           Added ``whitespace`` parameter.
-        """
-        self.autoescape = autoescape
-        self.namespace = namespace or {}
-        self.whitespace = whitespace
-        self.templates = {}  # type: Dict[str, Template]
-        # self.lock protects self.templates.  It's a reentrant lock
-        # because templates may load other templates via `include` or
-        # `extends`.  Note that thanks to the GIL this code would be safe
-        # even without the lock, but could lead to wasted work as multiple
-        # threads tried to compile the same template simultaneously.
-        self.lock = threading.RLock()
-
-    def reset(self) -> None:
-        """Resets the cache of compiled templates."""
-        with self.lock:
-            self.templates = {}
-
-    def resolve_path(self, name: str, parent_path: str = None) -> str:
-        """Converts a possibly-relative path to absolute (used internally)."""
-        raise NotImplementedError()
-
-    def load(self, name: str, parent_path: str = None) -> Template:
-        """Loads a template."""
-        name = self.resolve_path(name, parent_path=parent_path)
-        with self.lock:
-            if name not in self.templates:
-                self.templates[name] = self._create_template(name)
-            return self.templates[name]
-
-    def _create_template(self, name: str) -> Template:
-        raise NotImplementedError()
-
-
-class Loader(BaseLoader):
-    """A template loader that loads from a single root directory.
-    """
-
-    def __init__(self, root_directory: str, **kwargs: Any) -> None:
-        super(Loader, self).__init__(**kwargs)
-        self.root = os.path.abspath(root_directory)
-
-    def resolve_path(self, name: str, parent_path: str = None) -> str:
-        if (
-            parent_path
-            and not parent_path.startswith("<")
-            and not parent_path.startswith("/")
-            and not name.startswith("/")
-        ):
-            current_path = os.path.join(self.root, parent_path)
-            file_dir = os.path.dirname(os.path.abspath(current_path))
-            relative_path = os.path.abspath(os.path.join(file_dir, name))
-            if relative_path.startswith(self.root):
-                name = relative_path[len(self.root) + 1 :]
-        return name
-
-    def _create_template(self, name: str) -> Template:
-        path = os.path.join(self.root, name)
-        with open(path, "rb") as f:
-            template = Template(f.read(), name=name, loader=self)
-            return template
-
-
-class DictLoader(BaseLoader):
-    """A template loader that loads from a dictionary."""
-
-    def __init__(self, dict: Dict[str, str], **kwargs: Any) -> None:
-        super(DictLoader, self).__init__(**kwargs)
-        self.dict = dict
-
-    def resolve_path(self, name: str, parent_path: str = None) -> str:
-        if (
-            parent_path
-            and not parent_path.startswith("<")
-            and not parent_path.startswith("/")
-            and not name.startswith("/")
-        ):
-            file_dir = posixpath.dirname(parent_path)
-            name = posixpath.normpath(posixpath.join(file_dir, name))
-        return name
-
-    def _create_template(self, name: str) -> Template:
-        return Template(self.dict[name], name=name, loader=self)
-
-
-class _Node(object):
-    def each_child(self) -> Iterable["_Node"]:
-        return ()
-
-    def generate(self, writer: "_CodeWriter") -> None:
-        raise NotImplementedError()
-
-    def find_named_blocks(
-        self, loader: Optional[BaseLoader], named_blocks: Dict[str, "_NamedBlock"]
-    ) -> None:
-        for child in self.each_child():
-            child.find_named_blocks(loader, named_blocks)
-
-
-class _File(_Node):
-    def __init__(self, template: Template, body: "_ChunkList") -> None:
-        self.template = template
-        self.body = body
-        self.line = 0
-
-    def generate(self, writer: "_CodeWriter") -> None:
-        writer.write_line("def _tt_execute():", self.line)
-        with writer.indent():
-            writer.write_line("_tt_buffer = []", self.line)
-            writer.write_line("_tt_append = _tt_buffer.append", self.line)
-            self.body.generate(writer)
-            writer.write_line("return _tt_utf8('').join(_tt_buffer)", self.line)
-
-    def each_child(self) -> Iterable["_Node"]:
-        return (self.body,)
-
-
-class _ChunkList(_Node):
-    def __init__(self, chunks: List[_Node]) -> None:
-        self.chunks = chunks
-
-    def generate(self, writer: "_CodeWriter") -> None:
-        for chunk in self.chunks:
-            chunk.generate(writer)
-
-    def each_child(self) -> Iterable["_Node"]:
-        return self.chunks
-
-
-class _NamedBlock(_Node):
-    def __init__(self, name: str, body: _Node, template: Template, line: int) -> None:
-        self.name = name
-        self.body = body
-        self.template = template
-        self.line = line
-
-    def each_child(self) -> Iterable["_Node"]:
-        return (self.body,)
-
-    def generate(self, writer: "_CodeWriter") -> None:
-        block = writer.named_blocks[self.name]
-        with writer.include(block.template, self.line):
-            block.body.generate(writer)
-
-    def find_named_blocks(
-        self, loader: Optional[BaseLoader], named_blocks: Dict[str, "_NamedBlock"]
-    ) -> None:
-        named_blocks[self.name] = self
-        _Node.find_named_blocks(self, loader, named_blocks)
-
-
-class _ExtendsBlock(_Node):
-    def __init__(self, name: str) -> None:
-        self.name = name
-
-
-class _IncludeBlock(_Node):
-    def __init__(self, name: str, reader: "_TemplateReader", line: int) -> None:
-        self.name = name
-        self.template_name = reader.name
-        self.line = line
-
-    def find_named_blocks(
-        self, loader: Optional[BaseLoader], named_blocks: Dict[str, _NamedBlock]
-    ) -> None:
-        assert loader is not None
-        included = loader.load(self.name, self.template_name)
-        included.file.find_named_blocks(loader, named_blocks)
-
-    def generate(self, writer: "_CodeWriter") -> None:
-        assert writer.loader is not None
-        included = writer.loader.load(self.name, self.template_name)
-        with writer.include(included, self.line):
-            included.file.body.generate(writer)
-
-
-class _ApplyBlock(_Node):
-    def __init__(self, method: str, line: int, body: _Node) -> None:
-        self.method = method
-        self.line = line
-        self.body = body
-
-    def each_child(self) -> Iterable["_Node"]:
-        return (self.body,)
-
-    def generate(self, writer: "_CodeWriter") -> None:
-        method_name = "_tt_apply%d" % writer.apply_counter
-        writer.apply_counter += 1
-        writer.write_line("def %s():" % method_name, self.line)
-        with writer.indent():
-            writer.write_line("_tt_buffer = []", self.line)
-            writer.write_line("_tt_append = _tt_buffer.append", self.line)
-            self.body.generate(writer)
-            writer.write_line("return _tt_utf8('').join(_tt_buffer)", self.line)
-        writer.write_line(
-            "_tt_append(_tt_utf8(%s(%s())))" % (self.method, method_name), self.line
-        )
-
-
-class _ControlBlock(_Node):
-    def __init__(self, statement: str, line: int, body: _Node) -> None:
-        self.statement = statement
-        self.line = line
-        self.body = body
-
-    def each_child(self) -> Iterable[_Node]:
-        return (self.body,)
-
-    def generate(self, writer: "_CodeWriter") -> None:
-        writer.write_line("%s:" % self.statement, self.line)
-        with writer.indent():
-            self.body.generate(writer)
-            # Just in case the body was empty
-            writer.write_line("pass", self.line)
-
-
-class _IntermediateControlBlock(_Node):
-    def __init__(self, statement: str, line: int) -> None:
-        self.statement = statement
-        self.line = line
-
-    def generate(self, writer: "_CodeWriter") -> None:
-        # In case the previous block was empty
-        writer.write_line("pass", self.line)
-        writer.write_line("%s:" % self.statement, self.line, writer.indent_size() - 1)
-
-
-class _Statement(_Node):
-    def __init__(self, statement: str, line: int) -> None:
-        self.statement = statement
-        self.line = line
-
-    def generate(self, writer: "_CodeWriter") -> None:
-        writer.write_line(self.statement, self.line)
-
-
-class _Expression(_Node):
-    def __init__(self, expression: str, line: int, raw: bool = False) -> None:
-        self.expression = expression
-        self.line = line
-        self.raw = raw
-
-    def generate(self, writer: "_CodeWriter") -> None:
-        writer.write_line("_tt_tmp = %s" % self.expression, self.line)
-        writer.write_line(
-            "if isinstance(_tt_tmp, _tt_string_types):" " _tt_tmp = _tt_utf8(_tt_tmp)",
-            self.line,
-        )
-        writer.write_line("else: _tt_tmp = _tt_utf8(str(_tt_tmp))", self.line)
-        if not self.raw and writer.current_template.autoescape is not None:
-            # In python3 functions like xhtml_escape return unicode,
-            # so we have to convert to utf8 again.
-            writer.write_line(
-                "_tt_tmp = _tt_utf8(%s(_tt_tmp))" % writer.current_template.autoescape,
-                self.line,
-            )
-        writer.write_line("_tt_append(_tt_tmp)", self.line)
-
-
-class _Module(_Expression):
-    def __init__(self, expression: str, line: int) -> None:
-        super(_Module, self).__init__("_tt_modules." + expression, line, raw=True)
-
-
-class _Text(_Node):
-    def __init__(self, value: str, line: int, whitespace: str) -> None:
-        self.value = value
-        self.line = line
-        self.whitespace = whitespace
-
-    def generate(self, writer: "_CodeWriter") -> None:
-        value = self.value
-
-        # Compress whitespace if requested, with a crude heuristic to avoid
-        # altering preformatted whitespace.
-        if "<pre>" not in value:
-            value = filter_whitespace(self.whitespace, value)
-
-        if value:
-            writer.write_line("_tt_append(%r)" % escape.utf8(value), self.line)
-
-
-class ParseError(Exception):
-    """Raised for template syntax errors.
-
-    ``ParseError`` instances have ``filename`` and ``lineno`` attributes
-    indicating the position of the error.
-
-    .. versionchanged:: 4.3
-       Added ``filename`` and ``lineno`` attributes.
-    """
-
-    def __init__(self, message: str, filename: str = None, lineno: int = 0) -> None:
-        self.message = message
-        # The names "filename" and "lineno" are chosen for consistency
-        # with python SyntaxError.
-        self.filename = filename
-        self.lineno = lineno
-
-    def __str__(self) -> str:
-        return "%s at %s:%d" % (self.message, self.filename, self.lineno)
-
-
-class _CodeWriter(object):
-    def __init__(
-        self,
-        file: TextIO,
-        named_blocks: Dict[str, _NamedBlock],
-        loader: Optional[BaseLoader],
-        current_template: Template,
-    ) -> None:
-        self.file = file
-        self.named_blocks = named_blocks
-        self.loader = loader
-        self.current_template = current_template
-        self.apply_counter = 0
-        self.include_stack = []  # type: List[Tuple[Template, int]]
-        self._indent = 0
-
-    def indent_size(self) -> int:
-        return self._indent
-
-    def indent(self) -> "ContextManager":
-        class Indenter(object):
-            def __enter__(_) -> "_CodeWriter":
-                self._indent += 1
-                return self
-
-            def __exit__(_, *args: Any) -> None:
-                assert self._indent > 0
-                self._indent -= 1
-
-        return Indenter()
-
-    def include(self, template: Template, line: int) -> "ContextManager":
-        self.include_stack.append((self.current_template, line))
-        self.current_template = template
-
-        class IncludeTemplate(object):
-            def __enter__(_) -> "_CodeWriter":
-                return self
-
-            def __exit__(_, *args: Any) -> None:
-                self.current_template = self.include_stack.pop()[0]
-
-        return IncludeTemplate()
-
-    def write_line(self, line: str, line_number: int, indent: int = None) -> None:
-        if indent is None:
-            indent = self._indent
-        line_comment = "  # %s:%d" % (self.current_template.name, line_number)
-        if self.include_stack:
-            ancestors = [
-                "%s:%d" % (tmpl.name, lineno) for (tmpl, lineno) in self.include_stack
-            ]
-            line_comment += " (via %s)" % ", ".join(reversed(ancestors))
-        print("    " * indent + line + line_comment, file=self.file)
-
-
-class _TemplateReader(object):
-    def __init__(self, name: str, text: str, whitespace: str) -> None:
-        self.name = name
-        self.text = text
-        self.whitespace = whitespace
-        self.line = 1
-        self.pos = 0
-
-    def find(self, needle: str, start: int = 0, end: int = None) -> int:
-        assert start >= 0, start
-        pos = self.pos
-        start += pos
-        if end is None:
-            index = self.text.find(needle, start)
-        else:
-            end += pos
-            assert end >= start
-            index = self.text.find(needle, start, end)
-        if index != -1:
-            index -= pos
-        return index
-
-    def consume(self, count: int = None) -> str:
-        if count is None:
-            count = len(self.text) - self.pos
-        newpos = self.pos + count
-        self.line += self.text.count("\n", self.pos, newpos)
-        s = self.text[self.pos : newpos]
-        self.pos = newpos
-        return s
-
-    def remaining(self) -> int:
-        return len(self.text) - self.pos
-
-    def __len__(self) -> int:
-        return self.remaining()
-
-    def __getitem__(self, key: Union[int, slice]) -> str:
-        if isinstance(key, slice):
-            size = len(self)
-            start, stop, step = key.indices(size)
-            if start is None:
-                start = self.pos
-            else:
-                start += self.pos
-            if stop is not None:
-                stop += self.pos
-            return self.text[slice(start, stop, step)]
-        elif key < 0:
-            return self.text[key]
-        else:
-            return self.text[self.pos + key]
-
-    def __str__(self) -> str:
-        return self.text[self.pos :]
-
-    def raise_parse_error(self, msg: str) -> None:
-        raise ParseError(msg, self.name, self.line)
-
-
-def _format_code(code: str) -> str:
-    lines = code.splitlines()
-    format = "%%%dd  %%s\n" % len(repr(len(lines) + 1))
-    return "".join([format % (i + 1, line) for (i, line) in enumerate(lines)])
-
-
-def _parse(
-    reader: _TemplateReader,
-    template: Template,
-    in_block: str = None,
-    in_loop: str = None,
-) -> _ChunkList:
-    body = _ChunkList([])
-    while True:
-        # Find next template directive
-        curly = 0
-        while True:
-            curly = reader.find("{", curly)
-            if curly == -1 or curly + 1 == reader.remaining():
-                # EOF
-                if in_block:
-                    reader.raise_parse_error(
-                        "Missing {%% end %%} block for %s" % in_block
-                    )
-                body.chunks.append(
-                    _Text(reader.consume(), reader.line, reader.whitespace)
-                )
-                return body
-            # If the first curly brace is not the start of a special token,
-            # start searching from the character after it
-            if reader[curly + 1] not in ("{", "%", "#"):
-                curly += 1
-                continue
-            # When there are more than 2 curlies in a row, use the
-            # innermost ones.  This is useful when generating languages
-            # like latex where curlies are also meaningful
-            if (
-                curly + 2 < reader.remaining()
-                and reader[curly + 1] == "{"
-                and reader[curly + 2] == "{"
-            ):
-                curly += 1
-                continue
-            break
-
-        # Append any text before the special token
-        if curly > 0:
-            cons = reader.consume(curly)
-            body.chunks.append(_Text(cons, reader.line, reader.whitespace))
-
-        start_brace = reader.consume(2)
-        line = reader.line
-
-        # Template directives may be escaped as "{{!" or "{%!".
-        # In this case output the braces and consume the "!".
-        # This is especially useful in conjunction with jquery templates,
-        # which also use double braces.
-        if reader.remaining() and reader[0] == "!":
-            reader.consume(1)
-            body.chunks.append(_Text(start_brace, line, reader.whitespace))
-            continue
-
-        # Comment
-        if start_brace == "{#":
-            end = reader.find("#}")
-            if end == -1:
-                reader.raise_parse_error("Missing end comment #}")
-            contents = reader.consume(end).strip()
-            reader.consume(2)
-            continue
-
-        # Expression
-        if start_brace == "{{":
-            end = reader.find("}}")
-            if end == -1:
-                reader.raise_parse_error("Missing end expression }}")
-            contents = reader.consume(end).strip()
-            reader.consume(2)
-            if not contents:
-                reader.raise_parse_error("Empty expression")
-            body.chunks.append(_Expression(contents, line))
-            continue
-
-        # Block
-        assert start_brace == "{%", start_brace
-        end = reader.find("%}")
-        if end == -1:
-            reader.raise_parse_error("Missing end block %}")
-        contents = reader.consume(end).strip()
-        reader.consume(2)
-        if not contents:
-            reader.raise_parse_error("Empty block tag ({% %})")
-
-        operator, space, suffix = contents.partition(" ")
-        suffix = suffix.strip()
-
-        # Intermediate ("else", "elif", etc) blocks
-        intermediate_blocks = {
-            "else": set(["if", "for", "while", "try"]),
-            "elif": set(["if"]),
-            "except": set(["try"]),
-            "finally": set(["try"]),
-        }
-        allowed_parents = intermediate_blocks.get(operator)
-        if allowed_parents is not None:
-            if not in_block:
-                reader.raise_parse_error(
-                    "%s outside %s block" % (operator, allowed_parents)
-                )
-            if in_block not in allowed_parents:
-                reader.raise_parse_error(
-                    "%s block cannot be attached to %s block" % (operator, in_block)
-                )
-            body.chunks.append(_IntermediateControlBlock(contents, line))
-            continue
-
-        # End tag
-        elif operator == "end":
-            if not in_block:
-                reader.raise_parse_error("Extra {% end %} block")
-            return body
-
-        elif operator in (
-            "extends",
-            "include",
-            "set",
-            "import",
-            "from",
-            "comment",
-            "autoescape",
-            "whitespace",
-            "raw",
-            "module",
-        ):
-            if operator == "comment":
-                continue
-            if operator == "extends":
-                suffix = suffix.strip('"').strip("'")
-                if not suffix:
-                    reader.raise_parse_error("extends missing file path")
-                block = _ExtendsBlock(suffix)  # type: _Node
-            elif operator in ("import", "from"):
-                if not suffix:
-                    reader.raise_parse_error("import missing statement")
-                block = _Statement(contents, line)
-            elif operator == "include":
-                suffix = suffix.strip('"').strip("'")
-                if not suffix:
-                    reader.raise_parse_error("include missing file path")
-                block = _IncludeBlock(suffix, reader, line)
-            elif operator == "set":
-                if not suffix:
-                    reader.raise_parse_error("set missing statement")
-                block = _Statement(suffix, line)
-            elif operator == "autoescape":
-                fn = suffix.strip()  # type: Optional[str]
-                if fn == "None":
-                    fn = None
-                template.autoescape = fn
-                continue
-            elif operator == "whitespace":
-                mode = suffix.strip()
-                # Validate the selected mode
-                filter_whitespace(mode, "")
-                reader.whitespace = mode
-                continue
-            elif operator == "raw":
-                block = _Expression(suffix, line, raw=True)
-            elif operator == "module":
-                block = _Module(suffix, line)
-            body.chunks.append(block)
-            continue
-
-        elif operator in ("apply", "block", "try", "if", "for", "while"):
-            # parse inner body recursively
-            if operator in ("for", "while"):
-                block_body = _parse(reader, template, operator, operator)
-            elif operator == "apply":
-                # apply creates a nested function so syntactically it's not
-                # in the loop.
-                block_body = _parse(reader, template, operator, None)
-            else:
-                block_body = _parse(reader, template, operator, in_loop)
-
-            if operator == "apply":
-                if not suffix:
-                    reader.raise_parse_error("apply missing method name")
-                block = _ApplyBlock(suffix, line, block_body)
-            elif operator == "block":
-                if not suffix:
-                    reader.raise_parse_error("block missing name")
-                block = _NamedBlock(suffix, block_body, template, line)
-            else:
-                block = _ControlBlock(contents, line, block_body)
-            body.chunks.append(block)
-            continue
-
-        elif operator in ("break", "continue"):
-            if not in_loop:
-                reader.raise_parse_error(
-                    "%s outside %s block" % (operator, set(["for", "while"]))
-                )
-            body.chunks.append(_Statement(contents, line))
-            continue
-
-        else:
-            reader.raise_parse_error("unknown operator: %r" % operator)
diff --git a/venv/lib/python3.7/site-packages/tornado/test/__init__.py b/venv/lib/python3.7/site-packages/tornado/test/__init__.py
deleted file mode 100644
index e69de29..0000000
diff --git a/venv/lib/python3.7/site-packages/tornado/test/__main__.py b/venv/lib/python3.7/site-packages/tornado/test/__main__.py
deleted file mode 100644
index 430c895..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/__main__.py
+++ /dev/null
@@ -1,12 +0,0 @@
-"""Shim to allow python -m tornado.test.
-
-This only works in python 2.7+.
-"""
-from tornado.test.runtests import all, main
-
-# tornado.testing.main autodiscovery relies on 'all' being present in
-# the main module, so import it here even though it is not used directly.
-# The following line prevents a pyflakes warning.
-all = all
-
-main()
diff --git a/venv/lib/python3.7/site-packages/tornado/test/asyncio_test.py b/venv/lib/python3.7/site-packages/tornado/test/asyncio_test.py
deleted file mode 100644
index aa9c2f9..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/asyncio_test.py
+++ /dev/null
@@ -1,190 +0,0 @@
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-import asyncio
-import unittest
-
-from concurrent.futures import ThreadPoolExecutor
-from tornado import gen
-from tornado.ioloop import IOLoop
-from tornado.platform.asyncio import (
-    AsyncIOLoop,
-    to_asyncio_future,
-    AnyThreadEventLoopPolicy,
-)
-from tornado.testing import AsyncTestCase, gen_test
-
-
-class AsyncIOLoopTest(AsyncTestCase):
-    def get_new_ioloop(self):
-        io_loop = AsyncIOLoop()
-        return io_loop
-
-    def test_asyncio_callback(self):
-        # Basic test that the asyncio loop is set up correctly.
-        asyncio.get_event_loop().call_soon(self.stop)
-        self.wait()
-
-    @gen_test
-    def test_asyncio_future(self):
-        # Test that we can yield an asyncio future from a tornado coroutine.
-        # Without 'yield from', we must wrap coroutines in ensure_future,
-        # which was introduced during Python 3.4, deprecating the prior "async".
-        if hasattr(asyncio, "ensure_future"):
-            ensure_future = asyncio.ensure_future
-        else:
-            # async is a reserved word in Python 3.7
-            ensure_future = getattr(asyncio, "async")
-
-        x = yield ensure_future(
-            asyncio.get_event_loop().run_in_executor(None, lambda: 42)
-        )
-        self.assertEqual(x, 42)
-
-    @gen_test
-    def test_asyncio_yield_from(self):
-        @gen.coroutine
-        def f():
-            event_loop = asyncio.get_event_loop()
-            x = yield from event_loop.run_in_executor(None, lambda: 42)
-            return x
-
-        result = yield f()
-        self.assertEqual(result, 42)
-
-    def test_asyncio_adapter(self):
-        # This test demonstrates that when using the asyncio coroutine
-        # runner (i.e. run_until_complete), the to_asyncio_future
-        # adapter is needed. No adapter is needed in the other direction,
-        # as demonstrated by other tests in the package.
-        @gen.coroutine
-        def tornado_coroutine():
-            yield gen.moment
-            raise gen.Return(42)
-
-        async def native_coroutine_without_adapter():
-            return await tornado_coroutine()
-
-        async def native_coroutine_with_adapter():
-            return await to_asyncio_future(tornado_coroutine())
-
-        # Use the adapter, but two degrees from the tornado coroutine.
-        async def native_coroutine_with_adapter2():
-            return await to_asyncio_future(native_coroutine_without_adapter())
-
-        # Tornado supports native coroutines both with and without adapters
-        self.assertEqual(self.io_loop.run_sync(native_coroutine_without_adapter), 42)
-        self.assertEqual(self.io_loop.run_sync(native_coroutine_with_adapter), 42)
-        self.assertEqual(self.io_loop.run_sync(native_coroutine_with_adapter2), 42)
-
-        # Asyncio only supports coroutines that yield asyncio-compatible
-        # Futures (which our Future is since 5.0).
-        self.assertEqual(
-            asyncio.get_event_loop().run_until_complete(
-                native_coroutine_without_adapter()
-            ),
-            42,
-        )
-        self.assertEqual(
-            asyncio.get_event_loop().run_until_complete(
-                native_coroutine_with_adapter()
-            ),
-            42,
-        )
-        self.assertEqual(
-            asyncio.get_event_loop().run_until_complete(
-                native_coroutine_with_adapter2()
-            ),
-            42,
-        )
-
-
-class LeakTest(unittest.TestCase):
-    def setUp(self):
-        # Trigger a cleanup of the mapping so we start with a clean slate.
-        AsyncIOLoop().close()
-        # If we don't clean up after ourselves other tests may fail on
-        # py34.
-        self.orig_policy = asyncio.get_event_loop_policy()
-        asyncio.set_event_loop_policy(asyncio.DefaultEventLoopPolicy())
-
-    def tearDown(self):
-        asyncio.get_event_loop().close()
-        asyncio.set_event_loop_policy(self.orig_policy)
-
-    def test_ioloop_close_leak(self):
-        orig_count = len(IOLoop._ioloop_for_asyncio)
-        for i in range(10):
-            # Create and close an AsyncIOLoop using Tornado interfaces.
-            loop = AsyncIOLoop()
-            loop.close()
-        new_count = len(IOLoop._ioloop_for_asyncio) - orig_count
-        self.assertEqual(new_count, 0)
-
-    def test_asyncio_close_leak(self):
-        orig_count = len(IOLoop._ioloop_for_asyncio)
-        for i in range(10):
-            # Create and close an AsyncIOMainLoop using asyncio interfaces.
-            loop = asyncio.new_event_loop()
-            loop.call_soon(IOLoop.current)
-            loop.call_soon(loop.stop)
-            loop.run_forever()
-            loop.close()
-        new_count = len(IOLoop._ioloop_for_asyncio) - orig_count
-        # Because the cleanup is run on new loop creation, we have one
-        # dangling entry in the map (but only one).
-        self.assertEqual(new_count, 1)
-
-
-class AnyThreadEventLoopPolicyTest(unittest.TestCase):
-    def setUp(self):
-        self.orig_policy = asyncio.get_event_loop_policy()
-        self.executor = ThreadPoolExecutor(1)
-
-    def tearDown(self):
-        asyncio.set_event_loop_policy(self.orig_policy)
-        self.executor.shutdown()
-
-    def get_event_loop_on_thread(self):
-        def get_and_close_event_loop():
-            """Get the event loop. Close it if one is returned.
-
-            Returns the (closed) event loop. This is a silly thing
-            to do and leaves the thread in a broken state, but it's
-            enough for this test. Closing the loop avoids resource
-            leak warnings.
-            """
-            loop = asyncio.get_event_loop()
-            loop.close()
-            return loop
-
-        future = self.executor.submit(get_and_close_event_loop)
-        return future.result()
-
-    def run_policy_test(self, accessor, expected_type):
-        # With the default policy, non-main threads don't get an event
-        # loop.
-        self.assertRaises(
-            (RuntimeError, AssertionError), self.executor.submit(accessor).result
-        )
-        # Set the policy and we can get a loop.
-        asyncio.set_event_loop_policy(AnyThreadEventLoopPolicy())
-        self.assertIsInstance(self.executor.submit(accessor).result(), expected_type)
-        # Clean up to silence leak warnings. Always use asyncio since
-        # IOLoop doesn't (currently) close the underlying loop.
-        self.executor.submit(lambda: asyncio.get_event_loop().close()).result()
-
-    def test_asyncio_accessor(self):
-        self.run_policy_test(asyncio.get_event_loop, asyncio.AbstractEventLoop)
-
-    def test_tornado_accessor(self):
-        self.run_policy_test(IOLoop.current, IOLoop)
diff --git a/venv/lib/python3.7/site-packages/tornado/test/auth_test.py b/venv/lib/python3.7/site-packages/tornado/test/auth_test.py
deleted file mode 100644
index 7807ae5..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/auth_test.py
+++ /dev/null
@@ -1,609 +0,0 @@
-# These tests do not currently do much to verify the correct implementation
-# of the openid/oauth protocols, they just exercise the major code paths
-# and ensure that it doesn't blow up (e.g. with unicode/bytes issues in
-# python 3)
-
-import unittest
-
-from tornado.auth import (
-    OpenIdMixin,
-    OAuthMixin,
-    OAuth2Mixin,
-    GoogleOAuth2Mixin,
-    FacebookGraphMixin,
-    TwitterMixin,
-)
-from tornado.escape import json_decode
-from tornado import gen
-from tornado.httpclient import HTTPClientError
-from tornado.httputil import url_concat
-from tornado.log import app_log
-from tornado.testing import AsyncHTTPTestCase, ExpectLog
-from tornado.web import RequestHandler, Application, HTTPError
-
-try:
-    from unittest import mock
-except ImportError:
-    mock = None  # type: ignore
-
-
-class OpenIdClientLoginHandler(RequestHandler, OpenIdMixin):
-    def initialize(self, test):
-        self._OPENID_ENDPOINT = test.get_url("/openid/server/authenticate")
-
-    @gen.coroutine
-    def get(self):
-        if self.get_argument("openid.mode", None):
-            user = yield self.get_authenticated_user(
-                http_client=self.settings["http_client"]
-            )
-            if user is None:
-                raise Exception("user is None")
-            self.finish(user)
-            return
-        res = self.authenticate_redirect()
-        assert res is None
-
-
-class OpenIdServerAuthenticateHandler(RequestHandler):
-    def post(self):
-        if self.get_argument("openid.mode") != "check_authentication":
-            raise Exception("incorrect openid.mode %r")
-        self.write("is_valid:true")
-
-
-class OAuth1ClientLoginHandler(RequestHandler, OAuthMixin):
-    def initialize(self, test, version):
-        self._OAUTH_VERSION = version
-        self._OAUTH_REQUEST_TOKEN_URL = test.get_url("/oauth1/server/request_token")
-        self._OAUTH_AUTHORIZE_URL = test.get_url("/oauth1/server/authorize")
-        self._OAUTH_ACCESS_TOKEN_URL = test.get_url("/oauth1/server/access_token")
-
-    def _oauth_consumer_token(self):
-        return dict(key="asdf", secret="qwer")
-
-    @gen.coroutine
-    def get(self):
-        if self.get_argument("oauth_token", None):
-            user = yield self.get_authenticated_user(
-                http_client=self.settings["http_client"]
-            )
-            if user is None:
-                raise Exception("user is None")
-            self.finish(user)
-            return
-        yield self.authorize_redirect(http_client=self.settings["http_client"])
-
-    @gen.coroutine
-    def _oauth_get_user_future(self, access_token):
-        if self.get_argument("fail_in_get_user", None):
-            raise Exception("failing in get_user")
-        if access_token != dict(key="uiop", secret="5678"):
-            raise Exception("incorrect access token %r" % access_token)
-        return dict(email="foo@example.com")
-
-
-class OAuth1ClientLoginCoroutineHandler(OAuth1ClientLoginHandler):
-    """Replaces OAuth1ClientLoginCoroutineHandler's get() with a coroutine."""
-
-    @gen.coroutine
-    def get(self):
-        if self.get_argument("oauth_token", None):
-            # Ensure that any exceptions are set on the returned Future,
-            # not simply thrown into the surrounding StackContext.
-            try:
-                yield self.get_authenticated_user()
-            except Exception as e:
-                self.set_status(503)
-                self.write("got exception: %s" % e)
-        else:
-            yield self.authorize_redirect()
-
-
-class OAuth1ClientRequestParametersHandler(RequestHandler, OAuthMixin):
-    def initialize(self, version):
-        self._OAUTH_VERSION = version
-
-    def _oauth_consumer_token(self):
-        return dict(key="asdf", secret="qwer")
-
-    def get(self):
-        params = self._oauth_request_parameters(
-            "http://www.example.com/api/asdf",
-            dict(key="uiop", secret="5678"),
-            parameters=dict(foo="bar"),
-        )
-        self.write(params)
-
-
-class OAuth1ServerRequestTokenHandler(RequestHandler):
-    def get(self):
-        self.write("oauth_token=zxcv&oauth_token_secret=1234")
-
-
-class OAuth1ServerAccessTokenHandler(RequestHandler):
-    def get(self):
-        self.write("oauth_token=uiop&oauth_token_secret=5678")
-
-
-class OAuth2ClientLoginHandler(RequestHandler, OAuth2Mixin):
-    def initialize(self, test):
-        self._OAUTH_AUTHORIZE_URL = test.get_url("/oauth2/server/authorize")
-
-    def get(self):
-        res = self.authorize_redirect()
-        assert res is None
-
-
-class FacebookClientLoginHandler(RequestHandler, FacebookGraphMixin):
-    def initialize(self, test):
-        self._OAUTH_AUTHORIZE_URL = test.get_url("/facebook/server/authorize")
-        self._OAUTH_ACCESS_TOKEN_URL = test.get_url("/facebook/server/access_token")
-        self._FACEBOOK_BASE_URL = test.get_url("/facebook/server")
-
-    @gen.coroutine
-    def get(self):
-        if self.get_argument("code", None):
-            user = yield self.get_authenticated_user(
-                redirect_uri=self.request.full_url(),
-                client_id=self.settings["facebook_api_key"],
-                client_secret=self.settings["facebook_secret"],
-                code=self.get_argument("code"),
-            )
-            self.write(user)
-        else:
-            yield self.authorize_redirect(
-                redirect_uri=self.request.full_url(),
-                client_id=self.settings["facebook_api_key"],
-                extra_params={"scope": "read_stream,offline_access"},
-            )
-
-
-class FacebookServerAccessTokenHandler(RequestHandler):
-    def get(self):
-        self.write(dict(access_token="asdf", expires_in=3600))
-
-
-class FacebookServerMeHandler(RequestHandler):
-    def get(self):
-        self.write("{}")
-
-
-class TwitterClientHandler(RequestHandler, TwitterMixin):
-    def initialize(self, test):
-        self._OAUTH_REQUEST_TOKEN_URL = test.get_url("/oauth1/server/request_token")
-        self._OAUTH_ACCESS_TOKEN_URL = test.get_url("/twitter/server/access_token")
-        self._OAUTH_AUTHORIZE_URL = test.get_url("/oauth1/server/authorize")
-        self._OAUTH_AUTHENTICATE_URL = test.get_url("/twitter/server/authenticate")
-        self._TWITTER_BASE_URL = test.get_url("/twitter/api")
-
-    def get_auth_http_client(self):
-        return self.settings["http_client"]
-
-
-class TwitterClientLoginHandler(TwitterClientHandler):
-    @gen.coroutine
-    def get(self):
-        if self.get_argument("oauth_token", None):
-            user = yield self.get_authenticated_user()
-            if user is None:
-                raise Exception("user is None")
-            self.finish(user)
-            return
-        yield self.authorize_redirect()
-
-
-class TwitterClientAuthenticateHandler(TwitterClientHandler):
-    # Like TwitterClientLoginHandler, but uses authenticate_redirect
-    # instead of authorize_redirect.
-    @gen.coroutine
-    def get(self):
-        if self.get_argument("oauth_token", None):
-            user = yield self.get_authenticated_user()
-            if user is None:
-                raise Exception("user is None")
-            self.finish(user)
-            return
-        yield self.authenticate_redirect()
-
-
-class TwitterClientLoginGenCoroutineHandler(TwitterClientHandler):
-    @gen.coroutine
-    def get(self):
-        if self.get_argument("oauth_token", None):
-            user = yield self.get_authenticated_user()
-            self.finish(user)
-        else:
-            # New style: with @gen.coroutine the result must be yielded
-            # or else the request will be auto-finished too soon.
-            yield self.authorize_redirect()
-
-
-class TwitterClientShowUserHandler(TwitterClientHandler):
-    @gen.coroutine
-    def get(self):
-        # TODO: would be nice to go through the login flow instead of
-        # cheating with a hard-coded access token.
-        try:
-            response = yield self.twitter_request(
-                "/users/show/%s" % self.get_argument("name"),
-                access_token=dict(key="hjkl", secret="vbnm"),
-            )
-        except HTTPClientError:
-            # TODO(bdarnell): Should we catch HTTP errors and
-            # transform some of them (like 403s) into AuthError?
-            self.set_status(500)
-            self.finish("error from twitter request")
-        else:
-            self.finish(response)
-
-
-class TwitterServerAccessTokenHandler(RequestHandler):
-    def get(self):
-        self.write("oauth_token=hjkl&oauth_token_secret=vbnm&screen_name=foo")
-
-
-class TwitterServerShowUserHandler(RequestHandler):
-    def get(self, screen_name):
-        if screen_name == "error":
-            raise HTTPError(500)
-        assert "oauth_nonce" in self.request.arguments
-        assert "oauth_timestamp" in self.request.arguments
-        assert "oauth_signature" in self.request.arguments
-        assert self.get_argument("oauth_consumer_key") == "test_twitter_consumer_key"
-        assert self.get_argument("oauth_signature_method") == "HMAC-SHA1"
-        assert self.get_argument("oauth_version") == "1.0"
-        assert self.get_argument("oauth_token") == "hjkl"
-        self.write(dict(screen_name=screen_name, name=screen_name.capitalize()))
-
-
-class TwitterServerVerifyCredentialsHandler(RequestHandler):
-    def get(self):
-        assert "oauth_nonce" in self.request.arguments
-        assert "oauth_timestamp" in self.request.arguments
-        assert "oauth_signature" in self.request.arguments
-        assert self.get_argument("oauth_consumer_key") == "test_twitter_consumer_key"
-        assert self.get_argument("oauth_signature_method") == "HMAC-SHA1"
-        assert self.get_argument("oauth_version") == "1.0"
-        assert self.get_argument("oauth_token") == "hjkl"
-        self.write(dict(screen_name="foo", name="Foo"))
-
-
-class AuthTest(AsyncHTTPTestCase):
-    def get_app(self):
-        return Application(
-            [
-                # test endpoints
-                ("/openid/client/login", OpenIdClientLoginHandler, dict(test=self)),
-                (
-                    "/oauth10/client/login",
-                    OAuth1ClientLoginHandler,
-                    dict(test=self, version="1.0"),
-                ),
-                (
-                    "/oauth10/client/request_params",
-                    OAuth1ClientRequestParametersHandler,
-                    dict(version="1.0"),
-                ),
-                (
-                    "/oauth10a/client/login",
-                    OAuth1ClientLoginHandler,
-                    dict(test=self, version="1.0a"),
-                ),
-                (
-                    "/oauth10a/client/login_coroutine",
-                    OAuth1ClientLoginCoroutineHandler,
-                    dict(test=self, version="1.0a"),
-                ),
-                (
-                    "/oauth10a/client/request_params",
-                    OAuth1ClientRequestParametersHandler,
-                    dict(version="1.0a"),
-                ),
-                ("/oauth2/client/login", OAuth2ClientLoginHandler, dict(test=self)),
-                ("/facebook/client/login", FacebookClientLoginHandler, dict(test=self)),
-                ("/twitter/client/login", TwitterClientLoginHandler, dict(test=self)),
-                (
-                    "/twitter/client/authenticate",
-                    TwitterClientAuthenticateHandler,
-                    dict(test=self),
-                ),
-                (
-                    "/twitter/client/login_gen_coroutine",
-                    TwitterClientLoginGenCoroutineHandler,
-                    dict(test=self),
-                ),
-                (
-                    "/twitter/client/show_user",
-                    TwitterClientShowUserHandler,
-                    dict(test=self),
-                ),
-                # simulated servers
-                ("/openid/server/authenticate", OpenIdServerAuthenticateHandler),
-                ("/oauth1/server/request_token", OAuth1ServerRequestTokenHandler),
-                ("/oauth1/server/access_token", OAuth1ServerAccessTokenHandler),
-                ("/facebook/server/access_token", FacebookServerAccessTokenHandler),
-                ("/facebook/server/me", FacebookServerMeHandler),
-                ("/twitter/server/access_token", TwitterServerAccessTokenHandler),
-                (r"/twitter/api/users/show/(.*)\.json", TwitterServerShowUserHandler),
-                (
-                    r"/twitter/api/account/verify_credentials\.json",
-                    TwitterServerVerifyCredentialsHandler,
-                ),
-            ],
-            http_client=self.http_client,
-            twitter_consumer_key="test_twitter_consumer_key",
-            twitter_consumer_secret="test_twitter_consumer_secret",
-            facebook_api_key="test_facebook_api_key",
-            facebook_secret="test_facebook_secret",
-        )
-
-    def test_openid_redirect(self):
-        response = self.fetch("/openid/client/login", follow_redirects=False)
-        self.assertEqual(response.code, 302)
-        self.assertTrue("/openid/server/authenticate?" in response.headers["Location"])
-
-    def test_openid_get_user(self):
-        response = self.fetch(
-            "/openid/client/login?openid.mode=blah"
-            "&openid.ns.ax=http://openid.net/srv/ax/1.0"
-            "&openid.ax.type.email=http://axschema.org/contact/email"
-            "&openid.ax.value.email=foo@example.com"
-        )
-        response.rethrow()
-        parsed = json_decode(response.body)
-        self.assertEqual(parsed["email"], "foo@example.com")
-
-    def test_oauth10_redirect(self):
-        response = self.fetch("/oauth10/client/login", follow_redirects=False)
-        self.assertEqual(response.code, 302)
-        self.assertTrue(
-            response.headers["Location"].endswith(
-                "/oauth1/server/authorize?oauth_token=zxcv"
-            )
-        )
-        # the cookie is base64('zxcv')|base64('1234')
-        self.assertTrue(
-            '_oauth_request_token="enhjdg==|MTIzNA=="'
-            in response.headers["Set-Cookie"],
-            response.headers["Set-Cookie"],
-        )
-
-    def test_oauth10_get_user(self):
-        response = self.fetch(
-            "/oauth10/client/login?oauth_token=zxcv",
-            headers={"Cookie": "_oauth_request_token=enhjdg==|MTIzNA=="},
-        )
-        response.rethrow()
-        parsed = json_decode(response.body)
-        self.assertEqual(parsed["email"], "foo@example.com")
-        self.assertEqual(parsed["access_token"], dict(key="uiop", secret="5678"))
-
-    def test_oauth10_request_parameters(self):
-        response = self.fetch("/oauth10/client/request_params")
-        response.rethrow()
-        parsed = json_decode(response.body)
-        self.assertEqual(parsed["oauth_consumer_key"], "asdf")
-        self.assertEqual(parsed["oauth_token"], "uiop")
-        self.assertTrue("oauth_nonce" in parsed)
-        self.assertTrue("oauth_signature" in parsed)
-
-    def test_oauth10a_redirect(self):
-        response = self.fetch("/oauth10a/client/login", follow_redirects=False)
-        self.assertEqual(response.code, 302)
-        self.assertTrue(
-            response.headers["Location"].endswith(
-                "/oauth1/server/authorize?oauth_token=zxcv"
-            )
-        )
-        # the cookie is base64('zxcv')|base64('1234')
-        self.assertTrue(
-            '_oauth_request_token="enhjdg==|MTIzNA=="'
-            in response.headers["Set-Cookie"],
-            response.headers["Set-Cookie"],
-        )
-
-    @unittest.skipIf(mock is None, "mock package not present")
-    def test_oauth10a_redirect_error(self):
-        with mock.patch.object(OAuth1ServerRequestTokenHandler, "get") as get:
-            get.side_effect = Exception("boom")
-            with ExpectLog(app_log, "Uncaught exception"):
-                response = self.fetch("/oauth10a/client/login", follow_redirects=False)
-            self.assertEqual(response.code, 500)
-
-    def test_oauth10a_get_user(self):
-        response = self.fetch(
-            "/oauth10a/client/login?oauth_token=zxcv",
-            headers={"Cookie": "_oauth_request_token=enhjdg==|MTIzNA=="},
-        )
-        response.rethrow()
-        parsed = json_decode(response.body)
-        self.assertEqual(parsed["email"], "foo@example.com")
-        self.assertEqual(parsed["access_token"], dict(key="uiop", secret="5678"))
-
-    def test_oauth10a_request_parameters(self):
-        response = self.fetch("/oauth10a/client/request_params")
-        response.rethrow()
-        parsed = json_decode(response.body)
-        self.assertEqual(parsed["oauth_consumer_key"], "asdf")
-        self.assertEqual(parsed["oauth_token"], "uiop")
-        self.assertTrue("oauth_nonce" in parsed)
-        self.assertTrue("oauth_signature" in parsed)
-
-    def test_oauth10a_get_user_coroutine_exception(self):
-        response = self.fetch(
-            "/oauth10a/client/login_coroutine?oauth_token=zxcv&fail_in_get_user=true",
-            headers={"Cookie": "_oauth_request_token=enhjdg==|MTIzNA=="},
-        )
-        self.assertEqual(response.code, 503)
-
-    def test_oauth2_redirect(self):
-        response = self.fetch("/oauth2/client/login", follow_redirects=False)
-        self.assertEqual(response.code, 302)
-        self.assertTrue("/oauth2/server/authorize?" in response.headers["Location"])
-
-    def test_facebook_login(self):
-        response = self.fetch("/facebook/client/login", follow_redirects=False)
-        self.assertEqual(response.code, 302)
-        self.assertTrue("/facebook/server/authorize?" in response.headers["Location"])
-        response = self.fetch(
-            "/facebook/client/login?code=1234", follow_redirects=False
-        )
-        self.assertEqual(response.code, 200)
-        user = json_decode(response.body)
-        self.assertEqual(user["access_token"], "asdf")
-        self.assertEqual(user["session_expires"], "3600")
-
-    def base_twitter_redirect(self, url):
-        # Same as test_oauth10a_redirect
-        response = self.fetch(url, follow_redirects=False)
-        self.assertEqual(response.code, 302)
-        self.assertTrue(
-            response.headers["Location"].endswith(
-                "/oauth1/server/authorize?oauth_token=zxcv"
-            )
-        )
-        # the cookie is base64('zxcv')|base64('1234')
-        self.assertTrue(
-            '_oauth_request_token="enhjdg==|MTIzNA=="'
-            in response.headers["Set-Cookie"],
-            response.headers["Set-Cookie"],
-        )
-
-    def test_twitter_redirect(self):
-        self.base_twitter_redirect("/twitter/client/login")
-
-    def test_twitter_redirect_gen_coroutine(self):
-        self.base_twitter_redirect("/twitter/client/login_gen_coroutine")
-
-    def test_twitter_authenticate_redirect(self):
-        response = self.fetch("/twitter/client/authenticate", follow_redirects=False)
-        self.assertEqual(response.code, 302)
-        self.assertTrue(
-            response.headers["Location"].endswith(
-                "/twitter/server/authenticate?oauth_token=zxcv"
-            ),
-            response.headers["Location"],
-        )
-        # the cookie is base64('zxcv')|base64('1234')
-        self.assertTrue(
-            '_oauth_request_token="enhjdg==|MTIzNA=="'
-            in response.headers["Set-Cookie"],
-            response.headers["Set-Cookie"],
-        )
-
-    def test_twitter_get_user(self):
-        response = self.fetch(
-            "/twitter/client/login?oauth_token=zxcv",
-            headers={"Cookie": "_oauth_request_token=enhjdg==|MTIzNA=="},
-        )
-        response.rethrow()
-        parsed = json_decode(response.body)
-        self.assertEqual(
-            parsed,
-            {
-                u"access_token": {
-                    u"key": u"hjkl",
-                    u"screen_name": u"foo",
-                    u"secret": u"vbnm",
-                },
-                u"name": u"Foo",
-                u"screen_name": u"foo",
-                u"username": u"foo",
-            },
-        )
-
-    def test_twitter_show_user(self):
-        response = self.fetch("/twitter/client/show_user?name=somebody")
-        response.rethrow()
-        self.assertEqual(
-            json_decode(response.body), {"name": "Somebody", "screen_name": "somebody"}
-        )
-
-    def test_twitter_show_user_error(self):
-        response = self.fetch("/twitter/client/show_user?name=error")
-        self.assertEqual(response.code, 500)
-        self.assertEqual(response.body, b"error from twitter request")
-
-
-class GoogleLoginHandler(RequestHandler, GoogleOAuth2Mixin):
-    def initialize(self, test):
-        self.test = test
-        self._OAUTH_REDIRECT_URI = test.get_url("/client/login")
-        self._OAUTH_AUTHORIZE_URL = test.get_url("/google/oauth2/authorize")
-        self._OAUTH_ACCESS_TOKEN_URL = test.get_url("/google/oauth2/token")
-
-    @gen.coroutine
-    def get(self):
-        code = self.get_argument("code", None)
-        if code is not None:
-            # retrieve authenticate google user
-            access = yield self.get_authenticated_user(self._OAUTH_REDIRECT_URI, code)
-            user = yield self.oauth2_request(
-                self.test.get_url("/google/oauth2/userinfo"),
-                access_token=access["access_token"],
-            )
-            # return the user and access token as json
-            user["access_token"] = access["access_token"]
-            self.write(user)
-        else:
-            yield self.authorize_redirect(
-                redirect_uri=self._OAUTH_REDIRECT_URI,
-                client_id=self.settings["google_oauth"]["key"],
-                client_secret=self.settings["google_oauth"]["secret"],
-                scope=["profile", "email"],
-                response_type="code",
-                extra_params={"prompt": "select_account"},
-            )
-
-
-class GoogleOAuth2AuthorizeHandler(RequestHandler):
-    def get(self):
-        # issue a fake auth code and redirect to redirect_uri
-        code = "fake-authorization-code"
-        self.redirect(url_concat(self.get_argument("redirect_uri"), dict(code=code)))
-
-
-class GoogleOAuth2TokenHandler(RequestHandler):
-    def post(self):
-        assert self.get_argument("code") == "fake-authorization-code"
-        # issue a fake token
-        self.finish(
-            {"access_token": "fake-access-token", "expires_in": "never-expires"}
-        )
-
-
-class GoogleOAuth2UserinfoHandler(RequestHandler):
-    def get(self):
-        assert self.get_argument("access_token") == "fake-access-token"
-        # return a fake user
-        self.finish({"name": "Foo", "email": "foo@example.com"})
-
-
-class GoogleOAuth2Test(AsyncHTTPTestCase):
-    def get_app(self):
-        return Application(
-            [
-                # test endpoints
-                ("/client/login", GoogleLoginHandler, dict(test=self)),
-                # simulated google authorization server endpoints
-                ("/google/oauth2/authorize", GoogleOAuth2AuthorizeHandler),
-                ("/google/oauth2/token", GoogleOAuth2TokenHandler),
-                ("/google/oauth2/userinfo", GoogleOAuth2UserinfoHandler),
-            ],
-            google_oauth={
-                "key": "fake_google_client_id",
-                "secret": "fake_google_client_secret",
-            },
-        )
-
-    def test_google_login(self):
-        response = self.fetch("/client/login")
-        self.assertDictEqual(
-            {
-                u"name": u"Foo",
-                u"email": u"foo@example.com",
-                u"access_token": u"fake-access-token",
-            },
-            json_decode(response.body),
-        )
diff --git a/venv/lib/python3.7/site-packages/tornado/test/autoreload_test.py b/venv/lib/python3.7/site-packages/tornado/test/autoreload_test.py
deleted file mode 100644
index be481e1..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/autoreload_test.py
+++ /dev/null
@@ -1,127 +0,0 @@
-import os
-import shutil
-import subprocess
-from subprocess import Popen
-import sys
-from tempfile import mkdtemp
-import time
-import unittest
-
-
-class AutoreloadTest(unittest.TestCase):
-    def setUp(self):
-        self.path = mkdtemp()
-
-    def tearDown(self):
-        try:
-            shutil.rmtree(self.path)
-        except OSError:
-            # Windows disallows deleting files that are in use by
-            # another process, and even though we've waited for our
-            # child process below, it appears that its lock on these
-            # files is not guaranteed to be released by this point.
-            # Sleep and try again (once).
-            time.sleep(1)
-            shutil.rmtree(self.path)
-
-    def test_reload_module(self):
-        main = """\
-import os
-import sys
-
-from tornado import autoreload
-
-# This import will fail if path is not set up correctly
-import testapp
-
-print('Starting')
-if 'TESTAPP_STARTED' not in os.environ:
-    os.environ['TESTAPP_STARTED'] = '1'
-    sys.stdout.flush()
-    autoreload._reload()
-"""
-
-        # Create temporary test application
-        os.mkdir(os.path.join(self.path, "testapp"))
-        open(os.path.join(self.path, "testapp/__init__.py"), "w").close()
-        with open(os.path.join(self.path, "testapp/__main__.py"), "w") as f:
-            f.write(main)
-
-        # Make sure the tornado module under test is available to the test
-        # application
-        pythonpath = os.getcwd()
-        if "PYTHONPATH" in os.environ:
-            pythonpath += os.pathsep + os.environ["PYTHONPATH"]
-
-        p = Popen(
-            [sys.executable, "-m", "testapp"],
-            stdout=subprocess.PIPE,
-            cwd=self.path,
-            env=dict(os.environ, PYTHONPATH=pythonpath),
-            universal_newlines=True,
-        )
-        out = p.communicate()[0]
-        self.assertEqual(out, "Starting\nStarting\n")
-
-    def test_reload_wrapper_preservation(self):
-        # This test verifies that when `python -m tornado.autoreload`
-        # is used on an application that also has an internal
-        # autoreload, the reload wrapper is preserved on restart.
-        main = """\
-import os
-import sys
-
-# This import will fail if path is not set up correctly
-import testapp
-
-if 'tornado.autoreload' not in sys.modules:
-    raise Exception('started without autoreload wrapper')
-
-import tornado.autoreload
-
-print('Starting')
-sys.stdout.flush()
-if 'TESTAPP_STARTED' not in os.environ:
-    os.environ['TESTAPP_STARTED'] = '1'
-    # Simulate an internal autoreload (one not caused
-    # by the wrapper).
-    tornado.autoreload._reload()
-else:
-    # Exit directly so autoreload doesn't catch it.
-    os._exit(0)
-"""
-
-        # Create temporary test application
-        os.mkdir(os.path.join(self.path, "testapp"))
-        init_file = os.path.join(self.path, "testapp", "__init__.py")
-        open(init_file, "w").close()
-        main_file = os.path.join(self.path, "testapp", "__main__.py")
-        with open(main_file, "w") as f:
-            f.write(main)
-
-        # Make sure the tornado module under test is available to the test
-        # application
-        pythonpath = os.getcwd()
-        if "PYTHONPATH" in os.environ:
-            pythonpath += os.pathsep + os.environ["PYTHONPATH"]
-
-        autoreload_proc = Popen(
-            [sys.executable, "-m", "tornado.autoreload", "-m", "testapp"],
-            stdout=subprocess.PIPE,
-            cwd=self.path,
-            env=dict(os.environ, PYTHONPATH=pythonpath),
-            universal_newlines=True,
-        )
-
-        # This timeout needs to be fairly generous for pypy due to jit
-        # warmup costs.
-        for i in range(40):
-            if autoreload_proc.poll() is not None:
-                break
-            time.sleep(0.1)
-        else:
-            autoreload_proc.kill()
-            raise Exception("subprocess failed to terminate")
-
-        out = autoreload_proc.communicate()[0]
-        self.assertEqual(out, "Starting\n" * 2)
diff --git a/venv/lib/python3.7/site-packages/tornado/test/concurrent_test.py b/venv/lib/python3.7/site-packages/tornado/test/concurrent_test.py
deleted file mode 100644
index 488b7dd..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/concurrent_test.py
+++ /dev/null
@@ -1,209 +0,0 @@
-#
-# Copyright 2012 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-from concurrent import futures
-import logging
-import re
-import socket
-import unittest
-
-from tornado.concurrent import (
-    Future,
-    run_on_executor,
-    future_set_result_unless_cancelled,
-)
-from tornado.escape import utf8, to_unicode
-from tornado import gen
-from tornado.iostream import IOStream
-from tornado.tcpserver import TCPServer
-from tornado.testing import AsyncTestCase, bind_unused_port, gen_test
-
-
-class MiscFutureTest(AsyncTestCase):
-    def test_future_set_result_unless_cancelled(self):
-        fut = Future()  # type: Future[int]
-        future_set_result_unless_cancelled(fut, 42)
-        self.assertEqual(fut.result(), 42)
-        self.assertFalse(fut.cancelled())
-
-        fut = Future()
-        fut.cancel()
-        is_cancelled = fut.cancelled()
-        future_set_result_unless_cancelled(fut, 42)
-        self.assertEqual(fut.cancelled(), is_cancelled)
-        if not is_cancelled:
-            self.assertEqual(fut.result(), 42)
-
-
-# The following series of classes demonstrate and test various styles
-# of use, with and without generators and futures.
-
-
-class CapServer(TCPServer):
-    @gen.coroutine
-    def handle_stream(self, stream, address):
-        data = yield stream.read_until(b"\n")
-        data = to_unicode(data)
-        if data == data.upper():
-            stream.write(b"error\talready capitalized\n")
-        else:
-            # data already has \n
-            stream.write(utf8("ok\t%s" % data.upper()))
-        stream.close()
-
-
-class CapError(Exception):
-    pass
-
-
-class BaseCapClient(object):
-    def __init__(self, port):
-        self.port = port
-
-    def process_response(self, data):
-        m = re.match("(.*)\t(.*)\n", to_unicode(data))
-        if m is None:
-            raise Exception("did not match")
-        status, message = m.groups()
-        if status == "ok":
-            return message
-        else:
-            raise CapError(message)
-
-
-class GeneratorCapClient(BaseCapClient):
-    @gen.coroutine
-    def capitalize(self, request_data):
-        logging.debug("capitalize")
-        stream = IOStream(socket.socket())
-        logging.debug("connecting")
-        yield stream.connect(("127.0.0.1", self.port))
-        stream.write(utf8(request_data + "\n"))
-        logging.debug("reading")
-        data = yield stream.read_until(b"\n")
-        logging.debug("returning")
-        stream.close()
-        raise gen.Return(self.process_response(data))
-
-
-class ClientTestMixin(object):
-    def setUp(self):
-        super(ClientTestMixin, self).setUp()  # type: ignore
-        self.server = CapServer()
-        sock, port = bind_unused_port()
-        self.server.add_sockets([sock])
-        self.client = self.client_class(port=port)
-
-    def tearDown(self):
-        self.server.stop()
-        super(ClientTestMixin, self).tearDown()  # type: ignore
-
-    def test_future(self):
-        future = self.client.capitalize("hello")
-        self.io_loop.add_future(future, self.stop)
-        self.wait()
-        self.assertEqual(future.result(), "HELLO")
-
-    def test_future_error(self):
-        future = self.client.capitalize("HELLO")
-        self.io_loop.add_future(future, self.stop)
-        self.wait()
-        self.assertRaisesRegexp(CapError, "already capitalized", future.result)
-
-    def test_generator(self):
-        @gen.coroutine
-        def f():
-            result = yield self.client.capitalize("hello")
-            self.assertEqual(result, "HELLO")
-
-        self.io_loop.run_sync(f)
-
-    def test_generator_error(self):
-        @gen.coroutine
-        def f():
-            with self.assertRaisesRegexp(CapError, "already capitalized"):
-                yield self.client.capitalize("HELLO")
-
-        self.io_loop.run_sync(f)
-
-
-class GeneratorClientTest(ClientTestMixin, AsyncTestCase):
-    client_class = GeneratorCapClient
-
-
-class RunOnExecutorTest(AsyncTestCase):
-    @gen_test
-    def test_no_calling(self):
-        class Object(object):
-            def __init__(self):
-                self.executor = futures.thread.ThreadPoolExecutor(1)
-
-            @run_on_executor
-            def f(self):
-                return 42
-
-        o = Object()
-        answer = yield o.f()
-        self.assertEqual(answer, 42)
-
-    @gen_test
-    def test_call_with_no_args(self):
-        class Object(object):
-            def __init__(self):
-                self.executor = futures.thread.ThreadPoolExecutor(1)
-
-            @run_on_executor()
-            def f(self):
-                return 42
-
-        o = Object()
-        answer = yield o.f()
-        self.assertEqual(answer, 42)
-
-    @gen_test
-    def test_call_with_executor(self):
-        class Object(object):
-            def __init__(self):
-                self.__executor = futures.thread.ThreadPoolExecutor(1)
-
-            @run_on_executor(executor="_Object__executor")
-            def f(self):
-                return 42
-
-        o = Object()
-        answer = yield o.f()
-        self.assertEqual(answer, 42)
-
-    @gen_test
-    def test_async_await(self):
-        class Object(object):
-            def __init__(self):
-                self.executor = futures.thread.ThreadPoolExecutor(1)
-
-            @run_on_executor()
-            def f(self):
-                return 42
-
-        o = Object()
-
-        async def f():
-            answer = await o.f()
-            return answer
-
-        result = yield f()
-        self.assertEqual(result, 42)
-
-
-if __name__ == "__main__":
-    unittest.main()
diff --git a/venv/lib/python3.7/site-packages/tornado/test/csv_translations/fr_FR.csv b/venv/lib/python3.7/site-packages/tornado/test/csv_translations/fr_FR.csv
deleted file mode 100644
index 6321b6e..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/csv_translations/fr_FR.csv
+++ /dev/null
@@ -1 +0,0 @@
-"school","école"
diff --git a/venv/lib/python3.7/site-packages/tornado/test/curl_httpclient_test.py b/venv/lib/python3.7/site-packages/tornado/test/curl_httpclient_test.py
deleted file mode 100644
index ccb19fe..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/curl_httpclient_test.py
+++ /dev/null
@@ -1,130 +0,0 @@
-# coding: utf-8
-from hashlib import md5
-import unittest
-
-from tornado.escape import utf8
-from tornado.testing import AsyncHTTPTestCase
-from tornado.test import httpclient_test
-from tornado.web import Application, RequestHandler
-
-
-try:
-    import pycurl  # type: ignore
-except ImportError:
-    pycurl = None
-
-if pycurl is not None:
-    from tornado.curl_httpclient import CurlAsyncHTTPClient
-
-
-@unittest.skipIf(pycurl is None, "pycurl module not present")
-class CurlHTTPClientCommonTestCase(httpclient_test.HTTPClientCommonTestCase):
-    def get_http_client(self):
-        client = CurlAsyncHTTPClient(defaults=dict(allow_ipv6=False))
-        # make sure AsyncHTTPClient magic doesn't give us the wrong class
-        self.assertTrue(isinstance(client, CurlAsyncHTTPClient))
-        return client
-
-
-class DigestAuthHandler(RequestHandler):
-    def initialize(self, username, password):
-        self.username = username
-        self.password = password
-
-    def get(self):
-        realm = "test"
-        opaque = "asdf"
-        # Real implementations would use a random nonce.
-        nonce = "1234"
-
-        auth_header = self.request.headers.get("Authorization", None)
-        if auth_header is not None:
-            auth_mode, params = auth_header.split(" ", 1)
-            assert auth_mode == "Digest"
-            param_dict = {}
-            for pair in params.split(","):
-                k, v = pair.strip().split("=", 1)
-                if v[0] == '"' and v[-1] == '"':
-                    v = v[1:-1]
-                param_dict[k] = v
-            assert param_dict["realm"] == realm
-            assert param_dict["opaque"] == opaque
-            assert param_dict["nonce"] == nonce
-            assert param_dict["username"] == self.username
-            assert param_dict["uri"] == self.request.path
-            h1 = md5(
-                utf8("%s:%s:%s" % (self.username, realm, self.password))
-            ).hexdigest()
-            h2 = md5(
-                utf8("%s:%s" % (self.request.method, self.request.path))
-            ).hexdigest()
-            digest = md5(utf8("%s:%s:%s" % (h1, nonce, h2))).hexdigest()
-            if digest == param_dict["response"]:
-                self.write("ok")
-            else:
-                self.write("fail")
-        else:
-            self.set_status(401)
-            self.set_header(
-                "WWW-Authenticate",
-                'Digest realm="%s", nonce="%s", opaque="%s"' % (realm, nonce, opaque),
-            )
-
-
-class CustomReasonHandler(RequestHandler):
-    def get(self):
-        self.set_status(200, "Custom reason")
-
-
-class CustomFailReasonHandler(RequestHandler):
-    def get(self):
-        self.set_status(400, "Custom reason")
-
-
-@unittest.skipIf(pycurl is None, "pycurl module not present")
-class CurlHTTPClientTestCase(AsyncHTTPTestCase):
-    def setUp(self):
-        super(CurlHTTPClientTestCase, self).setUp()
-        self.http_client = self.create_client()
-
-    def get_app(self):
-        return Application(
-            [
-                ("/digest", DigestAuthHandler, {"username": "foo", "password": "bar"}),
-                (
-                    "/digest_non_ascii",
-                    DigestAuthHandler,
-                    {"username": "foo", "password": "barユ£"},
-                ),
-                ("/custom_reason", CustomReasonHandler),
-                ("/custom_fail_reason", CustomFailReasonHandler),
-            ]
-        )
-
-    def create_client(self, **kwargs):
-        return CurlAsyncHTTPClient(
-            force_instance=True, defaults=dict(allow_ipv6=False), **kwargs
-        )
-
-    def test_digest_auth(self):
-        response = self.fetch(
-            "/digest", auth_mode="digest", auth_username="foo", auth_password="bar"
-        )
-        self.assertEqual(response.body, b"ok")
-
-    def test_custom_reason(self):
-        response = self.fetch("/custom_reason")
-        self.assertEqual(response.reason, "Custom reason")
-
-    def test_fail_custom_reason(self):
-        response = self.fetch("/custom_fail_reason")
-        self.assertEqual(str(response.error), "HTTP 400: Custom reason")
-
-    def test_digest_auth_non_ascii(self):
-        response = self.fetch(
-            "/digest_non_ascii",
-            auth_mode="digest",
-            auth_username="foo",
-            auth_password="barユ£",
-        )
-        self.assertEqual(response.body, b"ok")
diff --git a/venv/lib/python3.7/site-packages/tornado/test/escape_test.py b/venv/lib/python3.7/site-packages/tornado/test/escape_test.py
deleted file mode 100644
index d8f95e4..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/escape_test.py
+++ /dev/null
@@ -1,322 +0,0 @@
-import unittest
-
-import tornado.escape
-from tornado.escape import (
-    utf8,
-    xhtml_escape,
-    xhtml_unescape,
-    url_escape,
-    url_unescape,
-    to_unicode,
-    json_decode,
-    json_encode,
-    squeeze,
-    recursive_unicode,
-)
-from tornado.util import unicode_type
-
-from typing import List, Tuple, Union, Dict, Any  # noqa: F401
-
-linkify_tests = [
-    # (input, linkify_kwargs, expected_output)
-    (
-        "hello http://world.com/!",
-        {},
-        u'hello <a href="http://world.com/">http://world.com/</a>!',
-    ),
-    (
-        "hello http://world.com/with?param=true&stuff=yes",
-        {},
-        u'hello <a href="http://world.com/with?param=true&amp;stuff=yes">http://world.com/with?param=true&amp;stuff=yes</a>',  # noqa: E501
-    ),
-    # an opened paren followed by many chars killed Gruber's regex
-    (
-        "http://url.com/w(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
-        {},
-        u'<a href="http://url.com/w">http://url.com/w</a>(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa',  # noqa: E501
-    ),
-    # as did too many dots at the end
-    (
-        "http://url.com/withmany.......................................",
-        {},
-        u'<a href="http://url.com/withmany">http://url.com/withmany</a>.......................................',  # noqa: E501
-    ),
-    (
-        "http://url.com/withmany((((((((((((((((((((((((((((((((((a)",
-        {},
-        u'<a href="http://url.com/withmany">http://url.com/withmany</a>((((((((((((((((((((((((((((((((((a)',  # noqa: E501
-    ),
-    # some examples from http://daringfireball.net/2009/11/liberal_regex_for_matching_urls
-    # plus a fex extras (such as multiple parentheses).
-    (
-        "http://foo.com/blah_blah",
-        {},
-        u'<a href="http://foo.com/blah_blah">http://foo.com/blah_blah</a>',
-    ),
-    (
-        "http://foo.com/blah_blah/",
-        {},
-        u'<a href="http://foo.com/blah_blah/">http://foo.com/blah_blah/</a>',
-    ),
-    (
-        "(Something like http://foo.com/blah_blah)",
-        {},
-        u'(Something like <a href="http://foo.com/blah_blah">http://foo.com/blah_blah</a>)',
-    ),
-    (
-        "http://foo.com/blah_blah_(wikipedia)",
-        {},
-        u'<a href="http://foo.com/blah_blah_(wikipedia)">http://foo.com/blah_blah_(wikipedia)</a>',
-    ),
-    (
-        "http://foo.com/blah_(blah)_(wikipedia)_blah",
-        {},
-        u'<a href="http://foo.com/blah_(blah)_(wikipedia)_blah">http://foo.com/blah_(blah)_(wikipedia)_blah</a>',  # noqa: E501
-    ),
-    (
-        "(Something like http://foo.com/blah_blah_(wikipedia))",
-        {},
-        u'(Something like <a href="http://foo.com/blah_blah_(wikipedia)">http://foo.com/blah_blah_(wikipedia)</a>)',  # noqa: E501
-    ),
-    (
-        "http://foo.com/blah_blah.",
-        {},
-        u'<a href="http://foo.com/blah_blah">http://foo.com/blah_blah</a>.',
-    ),
-    (
-        "http://foo.com/blah_blah/.",
-        {},
-        u'<a href="http://foo.com/blah_blah/">http://foo.com/blah_blah/</a>.',
-    ),
-    (
-        "<http://foo.com/blah_blah>",
-        {},
-        u'&lt;<a href="http://foo.com/blah_blah">http://foo.com/blah_blah</a>&gt;',
-    ),
-    (
-        "<http://foo.com/blah_blah/>",
-        {},
-        u'&lt;<a href="http://foo.com/blah_blah/">http://foo.com/blah_blah/</a>&gt;',
-    ),
-    (
-        "http://foo.com/blah_blah,",
-        {},
-        u'<a href="http://foo.com/blah_blah">http://foo.com/blah_blah</a>,',
-    ),
-    (
-        "http://www.example.com/wpstyle/?p=364.",
-        {},
-        u'<a href="http://www.example.com/wpstyle/?p=364">http://www.example.com/wpstyle/?p=364</a>.',  # noqa: E501
-    ),
-    (
-        "rdar://1234",
-        {"permitted_protocols": ["http", "rdar"]},
-        u'<a href="rdar://1234">rdar://1234</a>',
-    ),
-    (
-        "rdar:/1234",
-        {"permitted_protocols": ["rdar"]},
-        u'<a href="rdar:/1234">rdar:/1234</a>',
-    ),
-    (
-        "http://userid:password@example.com:8080",
-        {},
-        u'<a href="http://userid:password@example.com:8080">http://userid:password@example.com:8080</a>',  # noqa: E501
-    ),
-    (
-        "http://userid@example.com",
-        {},
-        u'<a href="http://userid@example.com">http://userid@example.com</a>',
-    ),
-    (
-        "http://userid@example.com:8080",
-        {},
-        u'<a href="http://userid@example.com:8080">http://userid@example.com:8080</a>',
-    ),
-    (
-        "http://userid:password@example.com",
-        {},
-        u'<a href="http://userid:password@example.com">http://userid:password@example.com</a>',
-    ),
-    (
-        "message://%3c330e7f8409726r6a4ba78dkf1fd71420c1bf6ff@mail.gmail.com%3e",
-        {"permitted_protocols": ["http", "message"]},
-        u'<a href="message://%3c330e7f8409726r6a4ba78dkf1fd71420c1bf6ff@mail.gmail.com%3e">'
-        u"message://%3c330e7f8409726r6a4ba78dkf1fd71420c1bf6ff@mail.gmail.com%3e</a>",
-    ),
-    (
-        u"http://\u27a1.ws/\u4a39",
-        {},
-        u'<a href="http://\u27a1.ws/\u4a39">http://\u27a1.ws/\u4a39</a>',
-    ),
-    (
-        "<tag>http://example.com</tag>",
-        {},
-        u'&lt;tag&gt;<a href="http://example.com">http://example.com</a>&lt;/tag&gt;',
-    ),
-    (
-        "Just a www.example.com link.",
-        {},
-        u'Just a <a href="http://www.example.com">www.example.com</a> link.',
-    ),
-    (
-        "Just a www.example.com link.",
-        {"require_protocol": True},
-        u"Just a www.example.com link.",
-    ),
-    (
-        "A http://reallylong.com/link/that/exceedsthelenglimit.html",
-        {"require_protocol": True, "shorten": True},
-        u'A <a href="http://reallylong.com/link/that/exceedsthelenglimit.html"'
-        u' title="http://reallylong.com/link/that/exceedsthelenglimit.html">http://reallylong.com/link...</a>',  # noqa: E501
-    ),
-    (
-        "A http://reallylongdomainnamethatwillbetoolong.com/hi!",
-        {"shorten": True},
-        u'A <a href="http://reallylongdomainnamethatwillbetoolong.com/hi"'
-        u' title="http://reallylongdomainnamethatwillbetoolong.com/hi">http://reallylongdomainnametha...</a>!',  # noqa: E501
-    ),
-    (
-        "A file:///passwords.txt and http://web.com link",
-        {},
-        u'A file:///passwords.txt and <a href="http://web.com">http://web.com</a> link',
-    ),
-    (
-        "A file:///passwords.txt and http://web.com link",
-        {"permitted_protocols": ["file"]},
-        u'A <a href="file:///passwords.txt">file:///passwords.txt</a> and http://web.com link',
-    ),
-    (
-        "www.external-link.com",
-        {"extra_params": 'rel="nofollow" class="external"'},
-        u'<a href="http://www.external-link.com" rel="nofollow" class="external">www.external-link.com</a>',  # noqa: E501
-    ),
-    (
-        "www.external-link.com and www.internal-link.com/blogs extra",
-        {
-            "extra_params": lambda href: 'class="internal"'
-            if href.startswith("http://www.internal-link.com")
-            else 'rel="nofollow" class="external"'
-        },
-        u'<a href="http://www.external-link.com" rel="nofollow" class="external">www.external-link.com</a>'  # noqa: E501
-        u' and <a href="http://www.internal-link.com/blogs" class="internal">www.internal-link.com/blogs</a> extra',  # noqa: E501
-    ),
-    (
-        "www.external-link.com",
-        {"extra_params": lambda href: '    rel="nofollow" class="external"  '},
-        u'<a href="http://www.external-link.com" rel="nofollow" class="external">www.external-link.com</a>',  # noqa: E501
-    ),
-]  # type: List[Tuple[Union[str, bytes], Dict[str, Any], str]]
-
-
-class EscapeTestCase(unittest.TestCase):
-    def test_linkify(self):
-        for text, kwargs, html in linkify_tests:
-            linked = tornado.escape.linkify(text, **kwargs)
-            self.assertEqual(linked, html)
-
-    def test_xhtml_escape(self):
-        tests = [
-            ("<foo>", "&lt;foo&gt;"),
-            (u"<foo>", u"&lt;foo&gt;"),
-            (b"<foo>", b"&lt;foo&gt;"),
-            ("<>&\"'", "&lt;&gt;&amp;&quot;&#39;"),
-            ("&amp;", "&amp;amp;"),
-            (u"<\u00e9>", u"&lt;\u00e9&gt;"),
-            (b"<\xc3\xa9>", b"&lt;\xc3\xa9&gt;"),
-        ]  # type: List[Tuple[Union[str, bytes], Union[str, bytes]]]
-        for unescaped, escaped in tests:
-            self.assertEqual(utf8(xhtml_escape(unescaped)), utf8(escaped))
-            self.assertEqual(utf8(unescaped), utf8(xhtml_unescape(escaped)))
-
-    def test_xhtml_unescape_numeric(self):
-        tests = [
-            ("foo&#32;bar", "foo bar"),
-            ("foo&#x20;bar", "foo bar"),
-            ("foo&#X20;bar", "foo bar"),
-            ("foo&#xabc;bar", u"foo\u0abcbar"),
-            ("foo&#xyz;bar", "foo&#xyz;bar"),  # invalid encoding
-            ("foo&#;bar", "foo&#;bar"),  # invalid encoding
-            ("foo&#x;bar", "foo&#x;bar"),  # invalid encoding
-        ]
-        for escaped, unescaped in tests:
-            self.assertEqual(unescaped, xhtml_unescape(escaped))
-
-    def test_url_escape_unicode(self):
-        tests = [
-            # byte strings are passed through as-is
-            (u"\u00e9".encode("utf8"), "%C3%A9"),
-            (u"\u00e9".encode("latin1"), "%E9"),
-            # unicode strings become utf8
-            (u"\u00e9", "%C3%A9"),
-        ]  # type: List[Tuple[Union[str, bytes], str]]
-        for unescaped, escaped in tests:
-            self.assertEqual(url_escape(unescaped), escaped)
-
-    def test_url_unescape_unicode(self):
-        tests = [
-            ("%C3%A9", u"\u00e9", "utf8"),
-            ("%C3%A9", u"\u00c3\u00a9", "latin1"),
-            ("%C3%A9", utf8(u"\u00e9"), None),
-        ]
-        for escaped, unescaped, encoding in tests:
-            # input strings to url_unescape should only contain ascii
-            # characters, but make sure the function accepts both byte
-            # and unicode strings.
-            self.assertEqual(url_unescape(to_unicode(escaped), encoding), unescaped)
-            self.assertEqual(url_unescape(utf8(escaped), encoding), unescaped)
-
-    def test_url_escape_quote_plus(self):
-        unescaped = "+ #%"
-        plus_escaped = "%2B+%23%25"
-        escaped = "%2B%20%23%25"
-        self.assertEqual(url_escape(unescaped), plus_escaped)
-        self.assertEqual(url_escape(unescaped, plus=False), escaped)
-        self.assertEqual(url_unescape(plus_escaped), unescaped)
-        self.assertEqual(url_unescape(escaped, plus=False), unescaped)
-        self.assertEqual(url_unescape(plus_escaped, encoding=None), utf8(unescaped))
-        self.assertEqual(
-            url_unescape(escaped, encoding=None, plus=False), utf8(unescaped)
-        )
-
-    def test_escape_return_types(self):
-        # On python2 the escape methods should generally return the same
-        # type as their argument
-        self.assertEqual(type(xhtml_escape("foo")), str)
-        self.assertEqual(type(xhtml_escape(u"foo")), unicode_type)
-
-    def test_json_decode(self):
-        # json_decode accepts both bytes and unicode, but strings it returns
-        # are always unicode.
-        self.assertEqual(json_decode(b'"foo"'), u"foo")
-        self.assertEqual(json_decode(u'"foo"'), u"foo")
-
-        # Non-ascii bytes are interpreted as utf8
-        self.assertEqual(json_decode(utf8(u'"\u00e9"')), u"\u00e9")
-
-    def test_json_encode(self):
-        # json deals with strings, not bytes.  On python 2 byte strings will
-        # convert automatically if they are utf8; on python 3 byte strings
-        # are not allowed.
-        self.assertEqual(json_decode(json_encode(u"\u00e9")), u"\u00e9")
-        if bytes is str:
-            self.assertEqual(json_decode(json_encode(utf8(u"\u00e9"))), u"\u00e9")
-            self.assertRaises(UnicodeDecodeError, json_encode, b"\xe9")
-
-    def test_squeeze(self):
-        self.assertEqual(
-            squeeze(u"sequences     of    whitespace   chars"),
-            u"sequences of whitespace chars",
-        )
-
-    def test_recursive_unicode(self):
-        tests = {
-            "dict": {b"foo": b"bar"},
-            "list": [b"foo", b"bar"],
-            "tuple": (b"foo", b"bar"),
-            "bytes": b"foo",
-        }
-        self.assertEqual(recursive_unicode(tests["dict"]), {u"foo": u"bar"})
-        self.assertEqual(recursive_unicode(tests["list"]), [u"foo", u"bar"])
-        self.assertEqual(recursive_unicode(tests["tuple"]), (u"foo", u"bar"))
-        self.assertEqual(recursive_unicode(tests["bytes"]), u"foo")
diff --git a/venv/lib/python3.7/site-packages/tornado/test/gen_test.py b/venv/lib/python3.7/site-packages/tornado/test/gen_test.py
deleted file mode 100644
index 659e226..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/gen_test.py
+++ /dev/null
@@ -1,1111 +0,0 @@
-import asyncio
-from concurrent import futures
-import gc
-import datetime
-import platform
-import sys
-import time
-import weakref
-import unittest
-
-from tornado.concurrent import Future
-from tornado.log import app_log
-from tornado.testing import AsyncHTTPTestCase, AsyncTestCase, ExpectLog, gen_test
-from tornado.test.util import skipOnTravis, skipNotCPython
-from tornado.web import Application, RequestHandler, HTTPError
-
-from tornado import gen
-
-try:
-    import contextvars
-except ImportError:
-    contextvars = None  # type: ignore
-
-import typing
-
-if typing.TYPE_CHECKING:
-    from typing import List, Optional  # noqa: F401
-
-
-class GenBasicTest(AsyncTestCase):
-    @gen.coroutine
-    def delay(self, iterations, arg):
-        """Returns arg after a number of IOLoop iterations."""
-        for i in range(iterations):
-            yield gen.moment
-        raise gen.Return(arg)
-
-    @gen.coroutine
-    def async_future(self, result):
-        yield gen.moment
-        return result
-
-    @gen.coroutine
-    def async_exception(self, e):
-        yield gen.moment
-        raise e
-
-    @gen.coroutine
-    def add_one_async(self, x):
-        yield gen.moment
-        raise gen.Return(x + 1)
-
-    def test_no_yield(self):
-        @gen.coroutine
-        def f():
-            pass
-
-        self.io_loop.run_sync(f)
-
-    def test_exception_phase1(self):
-        @gen.coroutine
-        def f():
-            1 / 0
-
-        self.assertRaises(ZeroDivisionError, self.io_loop.run_sync, f)
-
-    def test_exception_phase2(self):
-        @gen.coroutine
-        def f():
-            yield gen.moment
-            1 / 0
-
-        self.assertRaises(ZeroDivisionError, self.io_loop.run_sync, f)
-
-    def test_bogus_yield(self):
-        @gen.coroutine
-        def f():
-            yield 42
-
-        self.assertRaises(gen.BadYieldError, self.io_loop.run_sync, f)
-
-    def test_bogus_yield_tuple(self):
-        @gen.coroutine
-        def f():
-            yield (1, 2)
-
-        self.assertRaises(gen.BadYieldError, self.io_loop.run_sync, f)
-
-    def test_reuse(self):
-        @gen.coroutine
-        def f():
-            yield gen.moment
-
-        self.io_loop.run_sync(f)
-        self.io_loop.run_sync(f)
-
-    def test_none(self):
-        @gen.coroutine
-        def f():
-            yield None
-
-        self.io_loop.run_sync(f)
-
-    def test_multi(self):
-        @gen.coroutine
-        def f():
-            results = yield [self.add_one_async(1), self.add_one_async(2)]
-            self.assertEqual(results, [2, 3])
-
-        self.io_loop.run_sync(f)
-
-    def test_multi_dict(self):
-        @gen.coroutine
-        def f():
-            results = yield dict(foo=self.add_one_async(1), bar=self.add_one_async(2))
-            self.assertEqual(results, dict(foo=2, bar=3))
-
-        self.io_loop.run_sync(f)
-
-    def test_multi_delayed(self):
-        @gen.coroutine
-        def f():
-            # callbacks run at different times
-            responses = yield gen.multi_future(
-                [self.delay(3, "v1"), self.delay(1, "v2")]
-            )
-            self.assertEqual(responses, ["v1", "v2"])
-
-        self.io_loop.run_sync(f)
-
-    def test_multi_dict_delayed(self):
-        @gen.coroutine
-        def f():
-            # callbacks run at different times
-            responses = yield gen.multi_future(
-                dict(foo=self.delay(3, "v1"), bar=self.delay(1, "v2"))
-            )
-            self.assertEqual(responses, dict(foo="v1", bar="v2"))
-
-        self.io_loop.run_sync(f)
-
-    @skipOnTravis
-    @gen_test
-    def test_multi_performance(self):
-        # Yielding a list used to have quadratic performance; make
-        # sure a large list stays reasonable.  On my laptop a list of
-        # 2000 used to take 1.8s, now it takes 0.12.
-        start = time.time()
-        yield [gen.moment for i in range(2000)]
-        end = time.time()
-        self.assertLess(end - start, 1.0)
-
-    @gen_test
-    def test_multi_empty(self):
-        # Empty lists or dicts should return the same type.
-        x = yield []
-        self.assertTrue(isinstance(x, list))
-        y = yield {}
-        self.assertTrue(isinstance(y, dict))
-
-    @gen_test
-    def test_future(self):
-        result = yield self.async_future(1)
-        self.assertEqual(result, 1)
-
-    @gen_test
-    def test_multi_future(self):
-        results = yield [self.async_future(1), self.async_future(2)]
-        self.assertEqual(results, [1, 2])
-
-    @gen_test
-    def test_multi_future_duplicate(self):
-        # Note that this doesn't work with native corotines, only with
-        # decorated coroutines.
-        f = self.async_future(2)
-        results = yield [self.async_future(1), f, self.async_future(3), f]
-        self.assertEqual(results, [1, 2, 3, 2])
-
-    @gen_test
-    def test_multi_dict_future(self):
-        results = yield dict(foo=self.async_future(1), bar=self.async_future(2))
-        self.assertEqual(results, dict(foo=1, bar=2))
-
-    @gen_test
-    def test_multi_exceptions(self):
-        with ExpectLog(app_log, "Multiple exceptions in yield list"):
-            with self.assertRaises(RuntimeError) as cm:
-                yield gen.Multi(
-                    [
-                        self.async_exception(RuntimeError("error 1")),
-                        self.async_exception(RuntimeError("error 2")),
-                    ]
-                )
-        self.assertEqual(str(cm.exception), "error 1")
-
-        # With only one exception, no error is logged.
-        with self.assertRaises(RuntimeError):
-            yield gen.Multi(
-                [self.async_exception(RuntimeError("error 1")), self.async_future(2)]
-            )
-
-        # Exception logging may be explicitly quieted.
-        with self.assertRaises(RuntimeError):
-            yield gen.Multi(
-                [
-                    self.async_exception(RuntimeError("error 1")),
-                    self.async_exception(RuntimeError("error 2")),
-                ],
-                quiet_exceptions=RuntimeError,
-            )
-
-    @gen_test
-    def test_multi_future_exceptions(self):
-        with ExpectLog(app_log, "Multiple exceptions in yield list"):
-            with self.assertRaises(RuntimeError) as cm:
-                yield [
-                    self.async_exception(RuntimeError("error 1")),
-                    self.async_exception(RuntimeError("error 2")),
-                ]
-        self.assertEqual(str(cm.exception), "error 1")
-
-        # With only one exception, no error is logged.
-        with self.assertRaises(RuntimeError):
-            yield [self.async_exception(RuntimeError("error 1")), self.async_future(2)]
-
-        # Exception logging may be explicitly quieted.
-        with self.assertRaises(RuntimeError):
-            yield gen.multi_future(
-                [
-                    self.async_exception(RuntimeError("error 1")),
-                    self.async_exception(RuntimeError("error 2")),
-                ],
-                quiet_exceptions=RuntimeError,
-            )
-
-    def test_sync_raise_return(self):
-        @gen.coroutine
-        def f():
-            raise gen.Return()
-
-        self.io_loop.run_sync(f)
-
-    def test_async_raise_return(self):
-        @gen.coroutine
-        def f():
-            yield gen.moment
-            raise gen.Return()
-
-        self.io_loop.run_sync(f)
-
-    def test_sync_raise_return_value(self):
-        @gen.coroutine
-        def f():
-            raise gen.Return(42)
-
-        self.assertEqual(42, self.io_loop.run_sync(f))
-
-    def test_sync_raise_return_value_tuple(self):
-        @gen.coroutine
-        def f():
-            raise gen.Return((1, 2))
-
-        self.assertEqual((1, 2), self.io_loop.run_sync(f))
-
-    def test_async_raise_return_value(self):
-        @gen.coroutine
-        def f():
-            yield gen.moment
-            raise gen.Return(42)
-
-        self.assertEqual(42, self.io_loop.run_sync(f))
-
-    def test_async_raise_return_value_tuple(self):
-        @gen.coroutine
-        def f():
-            yield gen.moment
-            raise gen.Return((1, 2))
-
-        self.assertEqual((1, 2), self.io_loop.run_sync(f))
-
-
-class GenCoroutineTest(AsyncTestCase):
-    def setUp(self):
-        # Stray StopIteration exceptions can lead to tests exiting prematurely,
-        # so we need explicit checks here to make sure the tests run all
-        # the way through.
-        self.finished = False
-        super(GenCoroutineTest, self).setUp()
-
-    def tearDown(self):
-        super(GenCoroutineTest, self).tearDown()
-        assert self.finished
-
-    def test_attributes(self):
-        self.finished = True
-
-        def f():
-            yield gen.moment
-
-        coro = gen.coroutine(f)
-        self.assertEqual(coro.__name__, f.__name__)
-        self.assertEqual(coro.__module__, f.__module__)
-        self.assertIs(coro.__wrapped__, f)  # type: ignore
-
-    def test_is_coroutine_function(self):
-        self.finished = True
-
-        def f():
-            yield gen.moment
-
-        coro = gen.coroutine(f)
-        self.assertFalse(gen.is_coroutine_function(f))
-        self.assertTrue(gen.is_coroutine_function(coro))
-        self.assertFalse(gen.is_coroutine_function(coro()))
-
-    @gen_test
-    def test_sync_gen_return(self):
-        @gen.coroutine
-        def f():
-            raise gen.Return(42)
-
-        result = yield f()
-        self.assertEqual(result, 42)
-        self.finished = True
-
-    @gen_test
-    def test_async_gen_return(self):
-        @gen.coroutine
-        def f():
-            yield gen.moment
-            raise gen.Return(42)
-
-        result = yield f()
-        self.assertEqual(result, 42)
-        self.finished = True
-
-    @gen_test
-    def test_sync_return(self):
-        @gen.coroutine
-        def f():
-            return 42
-
-        result = yield f()
-        self.assertEqual(result, 42)
-        self.finished = True
-
-    @gen_test
-    def test_async_return(self):
-        @gen.coroutine
-        def f():
-            yield gen.moment
-            return 42
-
-        result = yield f()
-        self.assertEqual(result, 42)
-        self.finished = True
-
-    @gen_test
-    def test_async_early_return(self):
-        # A yield statement exists but is not executed, which means
-        # this function "returns" via an exception.  This exception
-        # doesn't happen before the exception handling is set up.
-        @gen.coroutine
-        def f():
-            if True:
-                return 42
-            yield gen.Task(self.io_loop.add_callback)
-
-        result = yield f()
-        self.assertEqual(result, 42)
-        self.finished = True
-
-    @gen_test
-    def test_async_await(self):
-        @gen.coroutine
-        def f1():
-            yield gen.moment
-            raise gen.Return(42)
-
-        # This test verifies that an async function can await a
-        # yield-based gen.coroutine, and that a gen.coroutine
-        # (the test method itself) can yield an async function.
-        async def f2():
-            result = await f1()
-            return result
-
-        result = yield f2()
-        self.assertEqual(result, 42)
-        self.finished = True
-
-    @gen_test
-    def test_asyncio_sleep_zero(self):
-        # asyncio.sleep(0) turns into a special case (equivalent to
-        # `yield None`)
-        async def f():
-            import asyncio
-
-            await asyncio.sleep(0)
-            return 42
-
-        result = yield f()
-        self.assertEqual(result, 42)
-        self.finished = True
-
-    @gen_test
-    def test_async_await_mixed_multi_native_future(self):
-        @gen.coroutine
-        def f1():
-            yield gen.moment
-
-        async def f2():
-            await f1()
-            return 42
-
-        @gen.coroutine
-        def f3():
-            yield gen.moment
-            raise gen.Return(43)
-
-        results = yield [f2(), f3()]
-        self.assertEqual(results, [42, 43])
-        self.finished = True
-
-    @gen_test
-    def test_async_with_timeout(self):
-        async def f1():
-            return 42
-
-        result = yield gen.with_timeout(datetime.timedelta(hours=1), f1())
-        self.assertEqual(result, 42)
-        self.finished = True
-
-    @gen_test
-    def test_sync_return_no_value(self):
-        @gen.coroutine
-        def f():
-            return
-
-        result = yield f()
-        self.assertEqual(result, None)
-        self.finished = True
-
-    @gen_test
-    def test_async_return_no_value(self):
-        # Without a return value we don't need python 3.3.
-        @gen.coroutine
-        def f():
-            yield gen.moment
-            return
-
-        result = yield f()
-        self.assertEqual(result, None)
-        self.finished = True
-
-    @gen_test
-    def test_sync_raise(self):
-        @gen.coroutine
-        def f():
-            1 / 0
-
-        # The exception is raised when the future is yielded
-        # (or equivalently when its result method is called),
-        # not when the function itself is called).
-        future = f()
-        with self.assertRaises(ZeroDivisionError):
-            yield future
-        self.finished = True
-
-    @gen_test
-    def test_async_raise(self):
-        @gen.coroutine
-        def f():
-            yield gen.moment
-            1 / 0
-
-        future = f()
-        with self.assertRaises(ZeroDivisionError):
-            yield future
-        self.finished = True
-
-    @gen_test
-    def test_replace_yieldpoint_exception(self):
-        # Test exception handling: a coroutine can catch one exception
-        # raised by a yield point and raise a different one.
-        @gen.coroutine
-        def f1():
-            1 / 0
-
-        @gen.coroutine
-        def f2():
-            try:
-                yield f1()
-            except ZeroDivisionError:
-                raise KeyError()
-
-        future = f2()
-        with self.assertRaises(KeyError):
-            yield future
-        self.finished = True
-
-    @gen_test
-    def test_swallow_yieldpoint_exception(self):
-        # Test exception handling: a coroutine can catch an exception
-        # raised by a yield point and not raise a different one.
-        @gen.coroutine
-        def f1():
-            1 / 0
-
-        @gen.coroutine
-        def f2():
-            try:
-                yield f1()
-            except ZeroDivisionError:
-                raise gen.Return(42)
-
-        result = yield f2()
-        self.assertEqual(result, 42)
-        self.finished = True
-
-    @gen_test
-    def test_moment(self):
-        calls = []
-
-        @gen.coroutine
-        def f(name, yieldable):
-            for i in range(5):
-                calls.append(name)
-                yield yieldable
-
-        # First, confirm the behavior without moment: each coroutine
-        # monopolizes the event loop until it finishes.
-        immediate = Future()  # type: Future[None]
-        immediate.set_result(None)
-        yield [f("a", immediate), f("b", immediate)]
-        self.assertEqual("".join(calls), "aaaaabbbbb")
-
-        # With moment, they take turns.
-        calls = []
-        yield [f("a", gen.moment), f("b", gen.moment)]
-        self.assertEqual("".join(calls), "ababababab")
-        self.finished = True
-
-        calls = []
-        yield [f("a", gen.moment), f("b", immediate)]
-        self.assertEqual("".join(calls), "abbbbbaaaa")
-
-    @gen_test
-    def test_sleep(self):
-        yield gen.sleep(0.01)
-        self.finished = True
-
-    @gen_test
-    def test_py3_leak_exception_context(self):
-        class LeakedException(Exception):
-            pass
-
-        @gen.coroutine
-        def inner(iteration):
-            raise LeakedException(iteration)
-
-        try:
-            yield inner(1)
-        except LeakedException as e:
-            self.assertEqual(str(e), "1")
-            self.assertIsNone(e.__context__)
-
-        try:
-            yield inner(2)
-        except LeakedException as e:
-            self.assertEqual(str(e), "2")
-            self.assertIsNone(e.__context__)
-
-        self.finished = True
-
-    @skipNotCPython
-    @unittest.skipIf(
-        (3,) < sys.version_info < (3, 6), "asyncio.Future has reference cycles"
-    )
-    def test_coroutine_refcounting(self):
-        # On CPython, tasks and their arguments should be released immediately
-        # without waiting for garbage collection.
-        @gen.coroutine
-        def inner():
-            class Foo(object):
-                pass
-
-            local_var = Foo()
-            self.local_ref = weakref.ref(local_var)
-
-            def dummy():
-                pass
-
-            yield gen.coroutine(dummy)()
-            raise ValueError("Some error")
-
-        @gen.coroutine
-        def inner2():
-            try:
-                yield inner()
-            except ValueError:
-                pass
-
-        self.io_loop.run_sync(inner2, timeout=3)
-
-        self.assertIs(self.local_ref(), None)
-        self.finished = True
-
-    def test_asyncio_future_debug_info(self):
-        self.finished = True
-        # Enable debug mode
-        asyncio_loop = asyncio.get_event_loop()
-        self.addCleanup(asyncio_loop.set_debug, asyncio_loop.get_debug())
-        asyncio_loop.set_debug(True)
-
-        def f():
-            yield gen.moment
-
-        coro = gen.coroutine(f)()
-        self.assertIsInstance(coro, asyncio.Future)
-        # We expect the coroutine repr() to show the place where
-        # it was instantiated
-        expected = "created at %s:%d" % (__file__, f.__code__.co_firstlineno + 3)
-        actual = repr(coro)
-        self.assertIn(expected, actual)
-
-    @gen_test
-    def test_asyncio_gather(self):
-        # This demonstrates that tornado coroutines can be understood
-        # by asyncio (This failed prior to Tornado 5.0).
-        @gen.coroutine
-        def f():
-            yield gen.moment
-            raise gen.Return(1)
-
-        ret = yield asyncio.gather(f(), f())
-        self.assertEqual(ret, [1, 1])
-        self.finished = True
-
-
-class GenCoroutineSequenceHandler(RequestHandler):
-    @gen.coroutine
-    def get(self):
-        yield gen.moment
-        self.write("1")
-        yield gen.moment
-        self.write("2")
-        yield gen.moment
-        self.finish("3")
-
-
-class GenCoroutineUnfinishedSequenceHandler(RequestHandler):
-    @gen.coroutine
-    def get(self):
-        yield gen.moment
-        self.write("1")
-        yield gen.moment
-        self.write("2")
-        yield gen.moment
-        # just write, don't finish
-        self.write("3")
-
-
-# "Undecorated" here refers to the absence of @asynchronous.
-class UndecoratedCoroutinesHandler(RequestHandler):
-    @gen.coroutine
-    def prepare(self):
-        self.chunks = []  # type: List[str]
-        yield gen.moment
-        self.chunks.append("1")
-
-    @gen.coroutine
-    def get(self):
-        self.chunks.append("2")
-        yield gen.moment
-        self.chunks.append("3")
-        yield gen.moment
-        self.write("".join(self.chunks))
-
-
-class AsyncPrepareErrorHandler(RequestHandler):
-    @gen.coroutine
-    def prepare(self):
-        yield gen.moment
-        raise HTTPError(403)
-
-    def get(self):
-        self.finish("ok")
-
-
-class NativeCoroutineHandler(RequestHandler):
-    async def get(self):
-        await asyncio.sleep(0)
-        self.write("ok")
-
-
-class GenWebTest(AsyncHTTPTestCase):
-    def get_app(self):
-        return Application(
-            [
-                ("/coroutine_sequence", GenCoroutineSequenceHandler),
-                (
-                    "/coroutine_unfinished_sequence",
-                    GenCoroutineUnfinishedSequenceHandler,
-                ),
-                ("/undecorated_coroutine", UndecoratedCoroutinesHandler),
-                ("/async_prepare_error", AsyncPrepareErrorHandler),
-                ("/native_coroutine", NativeCoroutineHandler),
-            ]
-        )
-
-    def test_coroutine_sequence_handler(self):
-        response = self.fetch("/coroutine_sequence")
-        self.assertEqual(response.body, b"123")
-
-    def test_coroutine_unfinished_sequence_handler(self):
-        response = self.fetch("/coroutine_unfinished_sequence")
-        self.assertEqual(response.body, b"123")
-
-    def test_undecorated_coroutines(self):
-        response = self.fetch("/undecorated_coroutine")
-        self.assertEqual(response.body, b"123")
-
-    def test_async_prepare_error_handler(self):
-        response = self.fetch("/async_prepare_error")
-        self.assertEqual(response.code, 403)
-
-    def test_native_coroutine_handler(self):
-        response = self.fetch("/native_coroutine")
-        self.assertEqual(response.code, 200)
-        self.assertEqual(response.body, b"ok")
-
-
-class WithTimeoutTest(AsyncTestCase):
-    @gen_test
-    def test_timeout(self):
-        with self.assertRaises(gen.TimeoutError):
-            yield gen.with_timeout(datetime.timedelta(seconds=0.1), Future())
-
-    @gen_test
-    def test_completes_before_timeout(self):
-        future = Future()  # type: Future[str]
-        self.io_loop.add_timeout(
-            datetime.timedelta(seconds=0.1), lambda: future.set_result("asdf")
-        )
-        result = yield gen.with_timeout(datetime.timedelta(seconds=3600), future)
-        self.assertEqual(result, "asdf")
-
-    @gen_test
-    def test_fails_before_timeout(self):
-        future = Future()  # type: Future[str]
-        self.io_loop.add_timeout(
-            datetime.timedelta(seconds=0.1),
-            lambda: future.set_exception(ZeroDivisionError()),
-        )
-        with self.assertRaises(ZeroDivisionError):
-            yield gen.with_timeout(datetime.timedelta(seconds=3600), future)
-
-    @gen_test
-    def test_already_resolved(self):
-        future = Future()  # type: Future[str]
-        future.set_result("asdf")
-        result = yield gen.with_timeout(datetime.timedelta(seconds=3600), future)
-        self.assertEqual(result, "asdf")
-
-    @gen_test
-    def test_timeout_concurrent_future(self):
-        # A concurrent future that does not resolve before the timeout.
-        with futures.ThreadPoolExecutor(1) as executor:
-            with self.assertRaises(gen.TimeoutError):
-                yield gen.with_timeout(
-                    self.io_loop.time(), executor.submit(time.sleep, 0.1)
-                )
-
-    @gen_test
-    def test_completed_concurrent_future(self):
-        # A concurrent future that is resolved before we even submit it
-        # to with_timeout.
-        with futures.ThreadPoolExecutor(1) as executor:
-
-            def dummy():
-                pass
-
-            f = executor.submit(dummy)
-            f.result()  # wait for completion
-            yield gen.with_timeout(datetime.timedelta(seconds=3600), f)
-
-    @gen_test
-    def test_normal_concurrent_future(self):
-        # A conccurrent future that resolves while waiting for the timeout.
-        with futures.ThreadPoolExecutor(1) as executor:
-            yield gen.with_timeout(
-                datetime.timedelta(seconds=3600),
-                executor.submit(lambda: time.sleep(0.01)),
-            )
-
-
-class WaitIteratorTest(AsyncTestCase):
-    @gen_test
-    def test_empty_iterator(self):
-        g = gen.WaitIterator()
-        self.assertTrue(g.done(), "empty generator iterated")
-
-        with self.assertRaises(ValueError):
-            g = gen.WaitIterator(Future(), bar=Future())
-
-        self.assertEqual(g.current_index, None, "bad nil current index")
-        self.assertEqual(g.current_future, None, "bad nil current future")
-
-    @gen_test
-    def test_already_done(self):
-        f1 = Future()  # type: Future[int]
-        f2 = Future()  # type: Future[int]
-        f3 = Future()  # type: Future[int]
-        f1.set_result(24)
-        f2.set_result(42)
-        f3.set_result(84)
-
-        g = gen.WaitIterator(f1, f2, f3)
-        i = 0
-        while not g.done():
-            r = yield g.next()
-            # Order is not guaranteed, but the current implementation
-            # preserves ordering of already-done Futures.
-            if i == 0:
-                self.assertEqual(g.current_index, 0)
-                self.assertIs(g.current_future, f1)
-                self.assertEqual(r, 24)
-            elif i == 1:
-                self.assertEqual(g.current_index, 1)
-                self.assertIs(g.current_future, f2)
-                self.assertEqual(r, 42)
-            elif i == 2:
-                self.assertEqual(g.current_index, 2)
-                self.assertIs(g.current_future, f3)
-                self.assertEqual(r, 84)
-            i += 1
-
-        self.assertEqual(g.current_index, None, "bad nil current index")
-        self.assertEqual(g.current_future, None, "bad nil current future")
-
-        dg = gen.WaitIterator(f1=f1, f2=f2)
-
-        while not dg.done():
-            dr = yield dg.next()
-            if dg.current_index == "f1":
-                self.assertTrue(
-                    dg.current_future == f1 and dr == 24,
-                    "WaitIterator dict status incorrect",
-                )
-            elif dg.current_index == "f2":
-                self.assertTrue(
-                    dg.current_future == f2 and dr == 42,
-                    "WaitIterator dict status incorrect",
-                )
-            else:
-                self.fail("got bad WaitIterator index {}".format(dg.current_index))
-
-            i += 1
-
-        self.assertEqual(dg.current_index, None, "bad nil current index")
-        self.assertEqual(dg.current_future, None, "bad nil current future")
-
-    def finish_coroutines(self, iteration, futures):
-        if iteration == 3:
-            futures[2].set_result(24)
-        elif iteration == 5:
-            futures[0].set_exception(ZeroDivisionError())
-        elif iteration == 8:
-            futures[1].set_result(42)
-            futures[3].set_result(84)
-
-        if iteration < 8:
-            self.io_loop.add_callback(self.finish_coroutines, iteration + 1, futures)
-
-    @gen_test
-    def test_iterator(self):
-        futures = [Future(), Future(), Future(), Future()]  # type: List[Future[int]]
-
-        self.finish_coroutines(0, futures)
-
-        g = gen.WaitIterator(*futures)
-
-        i = 0
-        while not g.done():
-            try:
-                r = yield g.next()
-            except ZeroDivisionError:
-                self.assertIs(g.current_future, futures[0], "exception future invalid")
-            else:
-                if i == 0:
-                    self.assertEqual(r, 24, "iterator value incorrect")
-                    self.assertEqual(g.current_index, 2, "wrong index")
-                elif i == 2:
-                    self.assertEqual(r, 42, "iterator value incorrect")
-                    self.assertEqual(g.current_index, 1, "wrong index")
-                elif i == 3:
-                    self.assertEqual(r, 84, "iterator value incorrect")
-                    self.assertEqual(g.current_index, 3, "wrong index")
-            i += 1
-
-    @gen_test
-    def test_iterator_async_await(self):
-        # Recreate the previous test with py35 syntax. It's a little clunky
-        # because of the way the previous test handles an exception on
-        # a single iteration.
-        futures = [Future(), Future(), Future(), Future()]  # type: List[Future[int]]
-        self.finish_coroutines(0, futures)
-        self.finished = False
-
-        async def f():
-            i = 0
-            g = gen.WaitIterator(*futures)
-            try:
-                async for r in g:
-                    if i == 0:
-                        self.assertEqual(r, 24, "iterator value incorrect")
-                        self.assertEqual(g.current_index, 2, "wrong index")
-                    else:
-                        raise Exception("expected exception on iteration 1")
-                    i += 1
-            except ZeroDivisionError:
-                i += 1
-            async for r in g:
-                if i == 2:
-                    self.assertEqual(r, 42, "iterator value incorrect")
-                    self.assertEqual(g.current_index, 1, "wrong index")
-                elif i == 3:
-                    self.assertEqual(r, 84, "iterator value incorrect")
-                    self.assertEqual(g.current_index, 3, "wrong index")
-                else:
-                    raise Exception("didn't expect iteration %d" % i)
-                i += 1
-            self.finished = True
-
-        yield f()
-        self.assertTrue(self.finished)
-
-    @gen_test
-    def test_no_ref(self):
-        # In this usage, there is no direct hard reference to the
-        # WaitIterator itself, only the Future it returns. Since
-        # WaitIterator uses weak references internally to improve GC
-        # performance, this used to cause problems.
-        yield gen.with_timeout(
-            datetime.timedelta(seconds=0.1), gen.WaitIterator(gen.sleep(0)).next()
-        )
-
-
-class RunnerGCTest(AsyncTestCase):
-    def is_pypy3(self):
-        return platform.python_implementation() == "PyPy" and sys.version_info > (3,)
-
-    @gen_test
-    def test_gc(self):
-        # Github issue 1769: Runner objects can get GCed unexpectedly
-        # while their future is alive.
-        weakref_scope = [None]  # type: List[Optional[weakref.ReferenceType]]
-
-        def callback():
-            gc.collect(2)
-            weakref_scope[0]().set_result(123)  # type: ignore
-
-        @gen.coroutine
-        def tester():
-            fut = Future()  # type: Future[int]
-            weakref_scope[0] = weakref.ref(fut)
-            self.io_loop.add_callback(callback)
-            yield fut
-
-        yield gen.with_timeout(datetime.timedelta(seconds=0.2), tester())
-
-    def test_gc_infinite_coro(self):
-        # Github issue 2229: suspended coroutines should be GCed when
-        # their loop is closed, even if they're involved in a reference
-        # cycle.
-        loop = self.get_new_ioloop()
-        result = []  # type: List[Optional[bool]]
-        wfut = []
-
-        @gen.coroutine
-        def infinite_coro():
-            try:
-                while True:
-                    yield gen.sleep(1e-3)
-                    result.append(True)
-            finally:
-                # coroutine finalizer
-                result.append(None)
-
-        @gen.coroutine
-        def do_something():
-            fut = infinite_coro()
-            fut._refcycle = fut  # type: ignore
-            wfut.append(weakref.ref(fut))
-            yield gen.sleep(0.2)
-
-        loop.run_sync(do_something)
-        loop.close()
-        gc.collect()
-        # Future was collected
-        self.assertIs(wfut[0](), None)
-        # At least one wakeup
-        self.assertGreaterEqual(len(result), 2)
-        if not self.is_pypy3():
-            # coroutine finalizer was called (not on PyPy3 apparently)
-            self.assertIs(result[-1], None)
-
-    def test_gc_infinite_async_await(self):
-        # Same as test_gc_infinite_coro, but with a `async def` function
-        import asyncio
-
-        async def infinite_coro(result):
-            try:
-                while True:
-                    await gen.sleep(1e-3)
-                    result.append(True)
-            finally:
-                # coroutine finalizer
-                result.append(None)
-
-        loop = self.get_new_ioloop()
-        result = []  # type: List[Optional[bool]]
-        wfut = []
-
-        @gen.coroutine
-        def do_something():
-            fut = asyncio.get_event_loop().create_task(infinite_coro(result))
-            fut._refcycle = fut  # type: ignore
-            wfut.append(weakref.ref(fut))
-            yield gen.sleep(0.2)
-
-        loop.run_sync(do_something)
-        with ExpectLog("asyncio", "Task was destroyed but it is pending"):
-            loop.close()
-            gc.collect()
-        # Future was collected
-        self.assertIs(wfut[0](), None)
-        # At least one wakeup and one finally
-        self.assertGreaterEqual(len(result), 2)
-        if not self.is_pypy3():
-            # coroutine finalizer was called (not on PyPy3 apparently)
-            self.assertIs(result[-1], None)
-
-    def test_multi_moment(self):
-        # Test gen.multi with moment
-        # now that it's not a real Future
-        @gen.coroutine
-        def wait_a_moment():
-            result = yield gen.multi([gen.moment, gen.moment])
-            raise gen.Return(result)
-
-        loop = self.get_new_ioloop()
-        result = loop.run_sync(wait_a_moment)
-        self.assertEqual(result, [None, None])
-
-
-if contextvars is not None:
-    ctx_var = contextvars.ContextVar("ctx_var")  # type: contextvars.ContextVar[int]
-
-
-@unittest.skipIf(contextvars is None, "contextvars module not present")
-class ContextVarsTest(AsyncTestCase):
-    async def native_root(self, x):
-        ctx_var.set(x)
-        await self.inner(x)
-
-    @gen.coroutine
-    def gen_root(self, x):
-        ctx_var.set(x)
-        yield
-        yield self.inner(x)
-
-    async def inner(self, x):
-        self.assertEqual(ctx_var.get(), x)
-        await self.gen_inner(x)
-        self.assertEqual(ctx_var.get(), x)
-
-        # IOLoop.run_in_executor doesn't automatically copy context
-        ctx = contextvars.copy_context()
-        await self.io_loop.run_in_executor(None, lambda: ctx.run(self.thread_inner, x))
-        self.assertEqual(ctx_var.get(), x)
-
-        # Neither does asyncio's run_in_executor.
-        await asyncio.get_event_loop().run_in_executor(
-            None, lambda: ctx.run(self.thread_inner, x)
-        )
-        self.assertEqual(ctx_var.get(), x)
-
-    @gen.coroutine
-    def gen_inner(self, x):
-        self.assertEqual(ctx_var.get(), x)
-        yield
-        self.assertEqual(ctx_var.get(), x)
-
-    def thread_inner(self, x):
-        self.assertEqual(ctx_var.get(), x)
-
-    @gen_test
-    def test_propagate(self):
-        # Verify that context vars get propagated across various
-        # combinations of native and decorated coroutines.
-        yield [
-            self.native_root(1),
-            self.native_root(2),
-            self.gen_root(3),
-            self.gen_root(4),
-        ]
-
-
-if __name__ == "__main__":
-    unittest.main()
diff --git a/venv/lib/python3.7/site-packages/tornado/test/gettext_translations/fr_FR/LC_MESSAGES/tornado_test.mo b/venv/lib/python3.7/site-packages/tornado/test/gettext_translations/fr_FR/LC_MESSAGES/tornado_test.mo
deleted file mode 100644
index a97bf9c..0000000
Binary files a/venv/lib/python3.7/site-packages/tornado/test/gettext_translations/fr_FR/LC_MESSAGES/tornado_test.mo and /dev/null differ
diff --git a/venv/lib/python3.7/site-packages/tornado/test/gettext_translations/fr_FR/LC_MESSAGES/tornado_test.po b/venv/lib/python3.7/site-packages/tornado/test/gettext_translations/fr_FR/LC_MESSAGES/tornado_test.po
deleted file mode 100644
index 88d72c8..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/gettext_translations/fr_FR/LC_MESSAGES/tornado_test.po
+++ /dev/null
@@ -1,47 +0,0 @@
-# SOME DESCRIPTIVE TITLE.
-# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
-# This file is distributed under the same license as the PACKAGE package.
-# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
-#
-#, fuzzy
-msgid ""
-msgstr ""
-"Project-Id-Version: PACKAGE VERSION\n"
-"Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2015-01-27 11:05+0300\n"
-"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
-"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
-"Language-Team: LANGUAGE <LL@li.org>\n"
-"Language: \n"
-"MIME-Version: 1.0\n"
-"Content-Type: text/plain; charset=utf-8\n"
-"Content-Transfer-Encoding: 8bit\n"
-"Plural-Forms: nplurals=2; plural=(n > 1);\n"
-
-#: extract_me.py:11
-msgid "school"
-msgstr "école"
-
-#: extract_me.py:12
-msgctxt "law"
-msgid "right"
-msgstr "le droit"
-
-#: extract_me.py:13
-msgctxt "good"
-msgid "right"
-msgstr "le bien"
-
-#: extract_me.py:14
-msgctxt "organization"
-msgid "club"
-msgid_plural "clubs"
-msgstr[0] "le club"
-msgstr[1] "les clubs"
-
-#: extract_me.py:15
-msgctxt "stick"
-msgid "club"
-msgid_plural "clubs"
-msgstr[0] "le bâton"
-msgstr[1] "les bâtons"
diff --git a/venv/lib/python3.7/site-packages/tornado/test/http1connection_test.py b/venv/lib/python3.7/site-packages/tornado/test/http1connection_test.py
deleted file mode 100644
index 023c02a..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/http1connection_test.py
+++ /dev/null
@@ -1,58 +0,0 @@
-import socket
-
-from tornado.http1connection import HTTP1Connection
-from tornado.httputil import HTTPMessageDelegate
-from tornado.iostream import IOStream
-from tornado.locks import Event
-from tornado.netutil import add_accept_handler
-from tornado.testing import AsyncTestCase, bind_unused_port, gen_test
-
-
-class HTTP1ConnectionTest(AsyncTestCase):
-    def setUp(self):
-        super(HTTP1ConnectionTest, self).setUp()
-        self.asyncSetUp()
-
-    @gen_test
-    def asyncSetUp(self):
-        listener, port = bind_unused_port()
-        event = Event()
-
-        def accept_callback(conn, addr):
-            self.server_stream = IOStream(conn)
-            self.addCleanup(self.server_stream.close)
-            event.set()
-
-        add_accept_handler(listener, accept_callback)
-        self.client_stream = IOStream(socket.socket())
-        self.addCleanup(self.client_stream.close)
-        yield [self.client_stream.connect(("127.0.0.1", port)), event.wait()]
-        self.io_loop.remove_handler(listener)
-        listener.close()
-
-    @gen_test
-    def test_http10_no_content_length(self):
-        # Regression test for a bug in which can_keep_alive would crash
-        # for an HTTP/1.0 (not 1.1) response with no content-length.
-        conn = HTTP1Connection(self.client_stream, True)
-        self.server_stream.write(b"HTTP/1.0 200 Not Modified\r\n\r\nhello")
-        self.server_stream.close()
-
-        event = Event()
-        test = self
-        body = []
-
-        class Delegate(HTTPMessageDelegate):
-            def headers_received(self, start_line, headers):
-                test.code = start_line.code
-
-            def data_received(self, data):
-                body.append(data)
-
-            def finish(self):
-                event.set()
-
-        yield conn.read_response(Delegate())
-        yield event.wait()
-        self.assertEqual(self.code, 200)
-        self.assertEqual(b"".join(body), b"hello")
diff --git a/venv/lib/python3.7/site-packages/tornado/test/httpclient_test.py b/venv/lib/python3.7/site-packages/tornado/test/httpclient_test.py
deleted file mode 100644
index 26a1ad7..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/httpclient_test.py
+++ /dev/null
@@ -1,832 +0,0 @@
-# -*- coding: utf-8 -*-
-import base64
-import binascii
-from contextlib import closing
-import copy
-import threading
-import datetime
-from io import BytesIO
-import subprocess
-import sys
-import time
-import typing  # noqa: F401
-import unicodedata
-import unittest
-
-from tornado.escape import utf8, native_str, to_unicode
-from tornado import gen
-from tornado.httpclient import (
-    HTTPRequest,
-    HTTPResponse,
-    _RequestProxy,
-    HTTPError,
-    HTTPClient,
-)
-from tornado.httpserver import HTTPServer
-from tornado.ioloop import IOLoop
-from tornado.iostream import IOStream
-from tornado.log import gen_log, app_log
-from tornado import netutil
-from tornado.testing import AsyncHTTPTestCase, bind_unused_port, gen_test, ExpectLog
-from tornado.test.util import skipOnTravis
-from tornado.web import Application, RequestHandler, url
-from tornado.httputil import format_timestamp, HTTPHeaders
-
-
-class HelloWorldHandler(RequestHandler):
-    def get(self):
-        name = self.get_argument("name", "world")
-        self.set_header("Content-Type", "text/plain")
-        self.finish("Hello %s!" % name)
-
-
-class PostHandler(RequestHandler):
-    def post(self):
-        self.finish(
-            "Post arg1: %s, arg2: %s"
-            % (self.get_argument("arg1"), self.get_argument("arg2"))
-        )
-
-
-class PutHandler(RequestHandler):
-    def put(self):
-        self.write("Put body: ")
-        self.write(self.request.body)
-
-
-class RedirectHandler(RequestHandler):
-    def prepare(self):
-        self.write("redirects can have bodies too")
-        self.redirect(
-            self.get_argument("url"), status=int(self.get_argument("status", "302"))
-        )
-
-
-class RedirectWithoutLocationHandler(RequestHandler):
-    def prepare(self):
-        # For testing error handling of a redirect with no location header.
-        self.set_status(301)
-        self.finish()
-
-
-class ChunkHandler(RequestHandler):
-    @gen.coroutine
-    def get(self):
-        self.write("asdf")
-        self.flush()
-        # Wait a bit to ensure the chunks are sent and received separately.
-        yield gen.sleep(0.01)
-        self.write("qwer")
-
-
-class AuthHandler(RequestHandler):
-    def get(self):
-        self.finish(self.request.headers["Authorization"])
-
-
-class CountdownHandler(RequestHandler):
-    def get(self, count):
-        count = int(count)
-        if count > 0:
-            self.redirect(self.reverse_url("countdown", count - 1))
-        else:
-            self.write("Zero")
-
-
-class EchoPostHandler(RequestHandler):
-    def post(self):
-        self.write(self.request.body)
-
-
-class UserAgentHandler(RequestHandler):
-    def get(self):
-        self.write(self.request.headers.get("User-Agent", "User agent not set"))
-
-
-class ContentLength304Handler(RequestHandler):
-    def get(self):
-        self.set_status(304)
-        self.set_header("Content-Length", 42)
-
-    def _clear_headers_for_304(self):
-        # Tornado strips content-length from 304 responses, but here we
-        # want to simulate servers that include the headers anyway.
-        pass
-
-
-class PatchHandler(RequestHandler):
-    def patch(self):
-        "Return the request payload - so we can check it is being kept"
-        self.write(self.request.body)
-
-
-class AllMethodsHandler(RequestHandler):
-    SUPPORTED_METHODS = RequestHandler.SUPPORTED_METHODS + ("OTHER",)  # type: ignore
-
-    def method(self):
-        self.write(self.request.method)
-
-    get = head = post = put = delete = options = patch = other = method  # type: ignore
-
-
-class SetHeaderHandler(RequestHandler):
-    def get(self):
-        # Use get_arguments for keys to get strings, but
-        # request.arguments for values to get bytes.
-        for k, v in zip(self.get_arguments("k"), self.request.arguments["v"]):
-            self.set_header(k, v)
-
-
-# These tests end up getting run redundantly: once here with the default
-# HTTPClient implementation, and then again in each implementation's own
-# test suite.
-
-
-class HTTPClientCommonTestCase(AsyncHTTPTestCase):
-    def get_app(self):
-        return Application(
-            [
-                url("/hello", HelloWorldHandler),
-                url("/post", PostHandler),
-                url("/put", PutHandler),
-                url("/redirect", RedirectHandler),
-                url("/redirect_without_location", RedirectWithoutLocationHandler),
-                url("/chunk", ChunkHandler),
-                url("/auth", AuthHandler),
-                url("/countdown/([0-9]+)", CountdownHandler, name="countdown"),
-                url("/echopost", EchoPostHandler),
-                url("/user_agent", UserAgentHandler),
-                url("/304_with_content_length", ContentLength304Handler),
-                url("/all_methods", AllMethodsHandler),
-                url("/patch", PatchHandler),
-                url("/set_header", SetHeaderHandler),
-            ],
-            gzip=True,
-        )
-
-    def test_patch_receives_payload(self):
-        body = b"some patch data"
-        response = self.fetch("/patch", method="PATCH", body=body)
-        self.assertEqual(response.code, 200)
-        self.assertEqual(response.body, body)
-
-    @skipOnTravis
-    def test_hello_world(self):
-        response = self.fetch("/hello")
-        self.assertEqual(response.code, 200)
-        self.assertEqual(response.headers["Content-Type"], "text/plain")
-        self.assertEqual(response.body, b"Hello world!")
-        self.assertEqual(int(response.request_time), 0)
-
-        response = self.fetch("/hello?name=Ben")
-        self.assertEqual(response.body, b"Hello Ben!")
-
-    def test_streaming_callback(self):
-        # streaming_callback is also tested in test_chunked
-        chunks = []  # type: typing.List[bytes]
-        response = self.fetch("/hello", streaming_callback=chunks.append)
-        # with streaming_callback, data goes to the callback and not response.body
-        self.assertEqual(chunks, [b"Hello world!"])
-        self.assertFalse(response.body)
-
-    def test_post(self):
-        response = self.fetch("/post", method="POST", body="arg1=foo&arg2=bar")
-        self.assertEqual(response.code, 200)
-        self.assertEqual(response.body, b"Post arg1: foo, arg2: bar")
-
-    def test_chunked(self):
-        response = self.fetch("/chunk")
-        self.assertEqual(response.body, b"asdfqwer")
-
-        chunks = []  # type: typing.List[bytes]
-        response = self.fetch("/chunk", streaming_callback=chunks.append)
-        self.assertEqual(chunks, [b"asdf", b"qwer"])
-        self.assertFalse(response.body)
-
-    def test_chunked_close(self):
-        # test case in which chunks spread read-callback processing
-        # over several ioloop iterations, but the connection is already closed.
-        sock, port = bind_unused_port()
-        with closing(sock):
-
-            @gen.coroutine
-            def accept_callback(conn, address):
-                # fake an HTTP server using chunked encoding where the final chunks
-                # and connection close all happen at once
-                stream = IOStream(conn)
-                request_data = yield stream.read_until(b"\r\n\r\n")
-                if b"HTTP/1." not in request_data:
-                    self.skipTest("requires HTTP/1.x")
-                yield stream.write(
-                    b"""\
-HTTP/1.1 200 OK
-Transfer-Encoding: chunked
-
-1
-1
-1
-2
-0
-
-""".replace(
-                        b"\n", b"\r\n"
-                    )
-                )
-                stream.close()
-
-            netutil.add_accept_handler(sock, accept_callback)  # type: ignore
-            resp = self.fetch("http://127.0.0.1:%d/" % port)
-            resp.rethrow()
-            self.assertEqual(resp.body, b"12")
-            self.io_loop.remove_handler(sock.fileno())
-
-    def test_basic_auth(self):
-        # This test data appears in section 2 of RFC 7617.
-        self.assertEqual(
-            self.fetch(
-                "/auth", auth_username="Aladdin", auth_password="open sesame"
-            ).body,
-            b"Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ==",
-        )
-
-    def test_basic_auth_explicit_mode(self):
-        self.assertEqual(
-            self.fetch(
-                "/auth",
-                auth_username="Aladdin",
-                auth_password="open sesame",
-                auth_mode="basic",
-            ).body,
-            b"Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ==",
-        )
-
-    def test_basic_auth_unicode(self):
-        # This test data appears in section 2.1 of RFC 7617.
-        self.assertEqual(
-            self.fetch("/auth", auth_username="test", auth_password="123£").body,
-            b"Basic dGVzdDoxMjPCow==",
-        )
-
-        # The standard mandates NFC. Give it a decomposed username
-        # and ensure it is normalized to composed form.
-        username = unicodedata.normalize("NFD", u"josé")
-        self.assertEqual(
-            self.fetch("/auth", auth_username=username, auth_password="səcrət").body,
-            b"Basic am9zw6k6c8mZY3LJmXQ=",
-        )
-
-    def test_unsupported_auth_mode(self):
-        # curl and simple clients handle errors a bit differently; the
-        # important thing is that they don't fall back to basic auth
-        # on an unknown mode.
-        with ExpectLog(gen_log, "uncaught exception", required=False):
-            with self.assertRaises((ValueError, HTTPError)):
-                self.fetch(
-                    "/auth",
-                    auth_username="Aladdin",
-                    auth_password="open sesame",
-                    auth_mode="asdf",
-                    raise_error=True,
-                )
-
-    def test_follow_redirect(self):
-        response = self.fetch("/countdown/2", follow_redirects=False)
-        self.assertEqual(302, response.code)
-        self.assertTrue(response.headers["Location"].endswith("/countdown/1"))
-
-        response = self.fetch("/countdown/2")
-        self.assertEqual(200, response.code)
-        self.assertTrue(response.effective_url.endswith("/countdown/0"))
-        self.assertEqual(b"Zero", response.body)
-
-    def test_redirect_without_location(self):
-        response = self.fetch("/redirect_without_location", follow_redirects=True)
-        # If there is no location header, the redirect response should
-        # just be returned as-is. (This should arguably raise an
-        # error, but libcurl doesn't treat this as an error, so we
-        # don't either).
-        self.assertEqual(301, response.code)
-
-    def test_redirect_put_with_body(self):
-        response = self.fetch(
-            "/redirect?url=/put&status=307", method="PUT", body="hello"
-        )
-        self.assertEqual(response.body, b"Put body: hello")
-
-    def test_redirect_put_without_body(self):
-        # This "without body" edge case is similar to what happens with body_producer.
-        response = self.fetch(
-            "/redirect?url=/put&status=307",
-            method="PUT",
-            allow_nonstandard_methods=True,
-        )
-        self.assertEqual(response.body, b"Put body: ")
-
-    def test_method_after_redirect(self):
-        # Legacy redirect codes (301, 302) convert POST requests to GET.
-        for status in [301, 302, 303]:
-            url = "/redirect?url=/all_methods&status=%d" % status
-            resp = self.fetch(url, method="POST", body=b"")
-            self.assertEqual(b"GET", resp.body)
-
-            # Other methods are left alone.
-            for method in ["GET", "OPTIONS", "PUT", "DELETE"]:
-                resp = self.fetch(url, method=method, allow_nonstandard_methods=True)
-                self.assertEqual(utf8(method), resp.body)
-            # HEAD is different so check it separately.
-            resp = self.fetch(url, method="HEAD")
-            self.assertEqual(200, resp.code)
-            self.assertEqual(b"", resp.body)
-
-        # Newer redirects always preserve the original method.
-        for status in [307, 308]:
-            url = "/redirect?url=/all_methods&status=307"
-            for method in ["GET", "OPTIONS", "POST", "PUT", "DELETE"]:
-                resp = self.fetch(url, method=method, allow_nonstandard_methods=True)
-                self.assertEqual(method, to_unicode(resp.body))
-            resp = self.fetch(url, method="HEAD")
-            self.assertEqual(200, resp.code)
-            self.assertEqual(b"", resp.body)
-
-    def test_credentials_in_url(self):
-        url = self.get_url("/auth").replace("http://", "http://me:secret@")
-        response = self.fetch(url)
-        self.assertEqual(b"Basic " + base64.b64encode(b"me:secret"), response.body)
-
-    def test_body_encoding(self):
-        unicode_body = u"\xe9"
-        byte_body = binascii.a2b_hex(b"e9")
-
-        # unicode string in body gets converted to utf8
-        response = self.fetch(
-            "/echopost",
-            method="POST",
-            body=unicode_body,
-            headers={"Content-Type": "application/blah"},
-        )
-        self.assertEqual(response.headers["Content-Length"], "2")
-        self.assertEqual(response.body, utf8(unicode_body))
-
-        # byte strings pass through directly
-        response = self.fetch(
-            "/echopost",
-            method="POST",
-            body=byte_body,
-            headers={"Content-Type": "application/blah"},
-        )
-        self.assertEqual(response.headers["Content-Length"], "1")
-        self.assertEqual(response.body, byte_body)
-
-        # Mixing unicode in headers and byte string bodies shouldn't
-        # break anything
-        response = self.fetch(
-            "/echopost",
-            method="POST",
-            body=byte_body,
-            headers={"Content-Type": "application/blah"},
-            user_agent=u"foo",
-        )
-        self.assertEqual(response.headers["Content-Length"], "1")
-        self.assertEqual(response.body, byte_body)
-
-    def test_types(self):
-        response = self.fetch("/hello")
-        self.assertEqual(type(response.body), bytes)
-        self.assertEqual(type(response.headers["Content-Type"]), str)
-        self.assertEqual(type(response.code), int)
-        self.assertEqual(type(response.effective_url), str)
-
-    def test_header_callback(self):
-        first_line = []
-        headers = {}
-        chunks = []
-
-        def header_callback(header_line):
-            if header_line.startswith("HTTP/1.1 101"):
-                # Upgrading to HTTP/2
-                pass
-            elif header_line.startswith("HTTP/"):
-                first_line.append(header_line)
-            elif header_line != "\r\n":
-                k, v = header_line.split(":", 1)
-                headers[k.lower()] = v.strip()
-
-        def streaming_callback(chunk):
-            # All header callbacks are run before any streaming callbacks,
-            # so the header data is available to process the data as it
-            # comes in.
-            self.assertEqual(headers["content-type"], "text/html; charset=UTF-8")
-            chunks.append(chunk)
-
-        self.fetch(
-            "/chunk",
-            header_callback=header_callback,
-            streaming_callback=streaming_callback,
-        )
-        self.assertEqual(len(first_line), 1, first_line)
-        self.assertRegexpMatches(first_line[0], "HTTP/[0-9]\\.[0-9] 200.*\r\n")
-        self.assertEqual(chunks, [b"asdf", b"qwer"])
-
-    @gen_test
-    def test_configure_defaults(self):
-        defaults = dict(user_agent="TestDefaultUserAgent", allow_ipv6=False)
-        # Construct a new instance of the configured client class
-        client = self.http_client.__class__(force_instance=True, defaults=defaults)
-        try:
-            response = yield client.fetch(self.get_url("/user_agent"))
-            self.assertEqual(response.body, b"TestDefaultUserAgent")
-        finally:
-            client.close()
-
-    def test_header_types(self):
-        # Header values may be passed as character or utf8 byte strings,
-        # in a plain dictionary or an HTTPHeaders object.
-        # Keys must always be the native str type.
-        # All combinations should have the same results on the wire.
-        for value in [u"MyUserAgent", b"MyUserAgent"]:
-            for container in [dict, HTTPHeaders]:
-                headers = container()
-                headers["User-Agent"] = value
-                resp = self.fetch("/user_agent", headers=headers)
-                self.assertEqual(
-                    resp.body,
-                    b"MyUserAgent",
-                    "response=%r, value=%r, container=%r"
-                    % (resp.body, value, container),
-                )
-
-    def test_multi_line_headers(self):
-        # Multi-line http headers are rare but rfc-allowed
-        # http://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html#sec4.2
-        sock, port = bind_unused_port()
-        with closing(sock):
-
-            @gen.coroutine
-            def accept_callback(conn, address):
-                stream = IOStream(conn)
-                request_data = yield stream.read_until(b"\r\n\r\n")
-                if b"HTTP/1." not in request_data:
-                    self.skipTest("requires HTTP/1.x")
-                yield stream.write(
-                    b"""\
-HTTP/1.1 200 OK
-X-XSS-Protection: 1;
-\tmode=block
-
-""".replace(
-                        b"\n", b"\r\n"
-                    )
-                )
-                stream.close()
-
-            netutil.add_accept_handler(sock, accept_callback)  # type: ignore
-            resp = self.fetch("http://127.0.0.1:%d/" % port)
-            resp.rethrow()
-            self.assertEqual(resp.headers["X-XSS-Protection"], "1; mode=block")
-            self.io_loop.remove_handler(sock.fileno())
-
-    def test_304_with_content_length(self):
-        # According to the spec 304 responses SHOULD NOT include
-        # Content-Length or other entity headers, but some servers do it
-        # anyway.
-        # http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.3.5
-        response = self.fetch("/304_with_content_length")
-        self.assertEqual(response.code, 304)
-        self.assertEqual(response.headers["Content-Length"], "42")
-
-    @gen_test
-    def test_future_interface(self):
-        response = yield self.http_client.fetch(self.get_url("/hello"))
-        self.assertEqual(response.body, b"Hello world!")
-
-    @gen_test
-    def test_future_http_error(self):
-        with self.assertRaises(HTTPError) as context:
-            yield self.http_client.fetch(self.get_url("/notfound"))
-        self.assertEqual(context.exception.code, 404)
-        self.assertEqual(context.exception.response.code, 404)
-
-    @gen_test
-    def test_future_http_error_no_raise(self):
-        response = yield self.http_client.fetch(
-            self.get_url("/notfound"), raise_error=False
-        )
-        self.assertEqual(response.code, 404)
-
-    @gen_test
-    def test_reuse_request_from_response(self):
-        # The response.request attribute should be an HTTPRequest, not
-        # a _RequestProxy.
-        # This test uses self.http_client.fetch because self.fetch calls
-        # self.get_url on the input unconditionally.
-        url = self.get_url("/hello")
-        response = yield self.http_client.fetch(url)
-        self.assertEqual(response.request.url, url)
-        self.assertTrue(isinstance(response.request, HTTPRequest))
-        response2 = yield self.http_client.fetch(response.request)
-        self.assertEqual(response2.body, b"Hello world!")
-
-    @gen_test
-    def test_bind_source_ip(self):
-        url = self.get_url("/hello")
-        request = HTTPRequest(url, network_interface="127.0.0.1")
-        response = yield self.http_client.fetch(request)
-        self.assertEqual(response.code, 200)
-
-        with self.assertRaises((ValueError, HTTPError)) as context:
-            request = HTTPRequest(url, network_interface="not-interface-or-ip")
-            yield self.http_client.fetch(request)
-        self.assertIn("not-interface-or-ip", str(context.exception))
-
-    def test_all_methods(self):
-        for method in ["GET", "DELETE", "OPTIONS"]:
-            response = self.fetch("/all_methods", method=method)
-            self.assertEqual(response.body, utf8(method))
-        for method in ["POST", "PUT", "PATCH"]:
-            response = self.fetch("/all_methods", method=method, body=b"")
-            self.assertEqual(response.body, utf8(method))
-        response = self.fetch("/all_methods", method="HEAD")
-        self.assertEqual(response.body, b"")
-        response = self.fetch(
-            "/all_methods", method="OTHER", allow_nonstandard_methods=True
-        )
-        self.assertEqual(response.body, b"OTHER")
-
-    def test_body_sanity_checks(self):
-        # These methods require a body.
-        for method in ("POST", "PUT", "PATCH"):
-            with self.assertRaises(ValueError) as context:
-                self.fetch("/all_methods", method=method, raise_error=True)
-            self.assertIn("must not be None", str(context.exception))
-
-            resp = self.fetch(
-                "/all_methods", method=method, allow_nonstandard_methods=True
-            )
-            self.assertEqual(resp.code, 200)
-
-        # These methods don't allow a body.
-        for method in ("GET", "DELETE", "OPTIONS"):
-            with self.assertRaises(ValueError) as context:
-                self.fetch(
-                    "/all_methods", method=method, body=b"asdf", raise_error=True
-                )
-            self.assertIn("must be None", str(context.exception))
-
-            # In most cases this can be overridden, but curl_httpclient
-            # does not allow body with a GET at all.
-            if method != "GET":
-                self.fetch(
-                    "/all_methods",
-                    method=method,
-                    body=b"asdf",
-                    allow_nonstandard_methods=True,
-                    raise_error=True,
-                )
-                self.assertEqual(resp.code, 200)
-
-    # This test causes odd failures with the combination of
-    # curl_httpclient (at least with the version of libcurl available
-    # on ubuntu 12.04), TwistedIOLoop, and epoll.  For POST (but not PUT),
-    # curl decides the response came back too soon and closes the connection
-    # to start again.  It does this *before* telling the socket callback to
-    # unregister the FD.  Some IOLoop implementations have special kernel
-    # integration to discover this immediately.  Tornado's IOLoops
-    # ignore errors on remove_handler to accommodate this behavior, but
-    # Twisted's reactor does not.  The removeReader call fails and so
-    # do all future removeAll calls (which our tests do at cleanup).
-    #
-    # def test_post_307(self):
-    #    response = self.fetch("/redirect?status=307&url=/post",
-    #                          method="POST", body=b"arg1=foo&arg2=bar")
-    #    self.assertEqual(response.body, b"Post arg1: foo, arg2: bar")
-
-    def test_put_307(self):
-        response = self.fetch(
-            "/redirect?status=307&url=/put", method="PUT", body=b"hello"
-        )
-        response.rethrow()
-        self.assertEqual(response.body, b"Put body: hello")
-
-    def test_non_ascii_header(self):
-        # Non-ascii headers are sent as latin1.
-        response = self.fetch("/set_header?k=foo&v=%E9")
-        response.rethrow()
-        self.assertEqual(response.headers["Foo"], native_str(u"\u00e9"))
-
-    def test_response_times(self):
-        # A few simple sanity checks of the response time fields to
-        # make sure they're using the right basis (between the
-        # wall-time and monotonic clocks).
-        start_time = time.time()
-        response = self.fetch("/hello")
-        response.rethrow()
-        self.assertGreaterEqual(response.request_time, 0)
-        self.assertLess(response.request_time, 1.0)
-        # A very crude check to make sure that start_time is based on
-        # wall time and not the monotonic clock.
-        self.assertLess(abs(response.start_time - start_time), 1.0)
-
-        for k, v in response.time_info.items():
-            self.assertTrue(0 <= v < 1.0, "time_info[%s] out of bounds: %s" % (k, v))
-
-    @gen_test
-    def test_error_after_cancel(self):
-        fut = self.http_client.fetch(self.get_url("/404"))
-        self.assertTrue(fut.cancel())
-        with ExpectLog(app_log, "Exception after Future was cancelled") as el:
-            # We can't wait on the cancelled Future any more, so just
-            # let the IOLoop run until the exception gets logged (or
-            # not, in which case we exit the loop and ExpectLog will
-            # raise).
-            for i in range(100):
-                yield gen.sleep(0.01)
-                if el.logged_stack:
-                    break
-
-
-class RequestProxyTest(unittest.TestCase):
-    def test_request_set(self):
-        proxy = _RequestProxy(
-            HTTPRequest("http://example.com/", user_agent="foo"), dict()
-        )
-        self.assertEqual(proxy.user_agent, "foo")
-
-    def test_default_set(self):
-        proxy = _RequestProxy(
-            HTTPRequest("http://example.com/"), dict(network_interface="foo")
-        )
-        self.assertEqual(proxy.network_interface, "foo")
-
-    def test_both_set(self):
-        proxy = _RequestProxy(
-            HTTPRequest("http://example.com/", proxy_host="foo"), dict(proxy_host="bar")
-        )
-        self.assertEqual(proxy.proxy_host, "foo")
-
-    def test_neither_set(self):
-        proxy = _RequestProxy(HTTPRequest("http://example.com/"), dict())
-        self.assertIs(proxy.auth_username, None)
-
-    def test_bad_attribute(self):
-        proxy = _RequestProxy(HTTPRequest("http://example.com/"), dict())
-        with self.assertRaises(AttributeError):
-            proxy.foo
-
-    def test_defaults_none(self):
-        proxy = _RequestProxy(HTTPRequest("http://example.com/"), None)
-        self.assertIs(proxy.auth_username, None)
-
-
-class HTTPResponseTestCase(unittest.TestCase):
-    def test_str(self):
-        response = HTTPResponse(  # type: ignore
-            HTTPRequest("http://example.com"), 200, headers={}, buffer=BytesIO()
-        )
-        s = str(response)
-        self.assertTrue(s.startswith("HTTPResponse("))
-        self.assertIn("code=200", s)
-
-
-class SyncHTTPClientTest(unittest.TestCase):
-    def setUp(self):
-        self.server_ioloop = IOLoop()
-        event = threading.Event()
-
-        @gen.coroutine
-        def init_server():
-            sock, self.port = bind_unused_port()
-            app = Application([("/", HelloWorldHandler)])
-            self.server = HTTPServer(app)
-            self.server.add_socket(sock)
-            event.set()
-
-        def start():
-            self.server_ioloop.run_sync(init_server)
-            self.server_ioloop.start()
-
-        self.server_thread = threading.Thread(target=start)
-        self.server_thread.start()
-        event.wait()
-
-        self.http_client = HTTPClient()
-
-    def tearDown(self):
-        def stop_server():
-            self.server.stop()
-            # Delay the shutdown of the IOLoop by several iterations because
-            # the server may still have some cleanup work left when
-            # the client finishes with the response (this is noticeable
-            # with http/2, which leaves a Future with an unexamined
-            # StreamClosedError on the loop).
-
-            @gen.coroutine
-            def slow_stop():
-                yield self.server.close_all_connections()
-                # The number of iterations is difficult to predict. Typically,
-                # one is sufficient, although sometimes it needs more.
-                for i in range(5):
-                    yield
-                self.server_ioloop.stop()
-
-            self.server_ioloop.add_callback(slow_stop)
-
-        self.server_ioloop.add_callback(stop_server)
-        self.server_thread.join()
-        self.http_client.close()
-        self.server_ioloop.close(all_fds=True)
-
-    def get_url(self, path):
-        return "http://127.0.0.1:%d%s" % (self.port, path)
-
-    def test_sync_client(self):
-        response = self.http_client.fetch(self.get_url("/"))
-        self.assertEqual(b"Hello world!", response.body)
-
-    def test_sync_client_error(self):
-        # Synchronous HTTPClient raises errors directly; no need for
-        # response.rethrow()
-        with self.assertRaises(HTTPError) as assertion:
-            self.http_client.fetch(self.get_url("/notfound"))
-        self.assertEqual(assertion.exception.code, 404)
-
-
-class SyncHTTPClientSubprocessTest(unittest.TestCase):
-    def test_destructor_log(self):
-        # Regression test for
-        # https://github.com/tornadoweb/tornado/issues/2539
-        #
-        # In the past, the following program would log an
-        # "inconsistent AsyncHTTPClient cache" error from a destructor
-        # when the process is shutting down. The shutdown process is
-        # subtle and I don't fully understand it; the failure does not
-        # manifest if that lambda isn't there or is a simpler object
-        # like an int (nor does it manifest in the tornado test suite
-        # as a whole, which is why we use this subprocess).
-        proc = subprocess.run(
-            [
-                sys.executable,
-                "-c",
-                "from tornado.httpclient import HTTPClient; f = lambda: None; c = HTTPClient()",
-            ],
-            stdout=subprocess.PIPE,
-            stderr=subprocess.STDOUT,
-            check=True,
-        )
-        if proc.stdout:
-            print("STDOUT:")
-            print(to_unicode(proc.stdout))
-        if proc.stdout:
-            self.fail("subprocess produced unexpected output")
-
-
-class HTTPRequestTestCase(unittest.TestCase):
-    def test_headers(self):
-        request = HTTPRequest("http://example.com", headers={"foo": "bar"})
-        self.assertEqual(request.headers, {"foo": "bar"})
-
-    def test_headers_setter(self):
-        request = HTTPRequest("http://example.com")
-        request.headers = {"bar": "baz"}  # type: ignore
-        self.assertEqual(request.headers, {"bar": "baz"})
-
-    def test_null_headers_setter(self):
-        request = HTTPRequest("http://example.com")
-        request.headers = None  # type: ignore
-        self.assertEqual(request.headers, {})
-
-    def test_body(self):
-        request = HTTPRequest("http://example.com", body="foo")
-        self.assertEqual(request.body, utf8("foo"))
-
-    def test_body_setter(self):
-        request = HTTPRequest("http://example.com")
-        request.body = "foo"  # type: ignore
-        self.assertEqual(request.body, utf8("foo"))
-
-    def test_if_modified_since(self):
-        http_date = datetime.datetime.utcnow()
-        request = HTTPRequest("http://example.com", if_modified_since=http_date)
-        self.assertEqual(
-            request.headers, {"If-Modified-Since": format_timestamp(http_date)}
-        )
-
-
-class HTTPErrorTestCase(unittest.TestCase):
-    def test_copy(self):
-        e = HTTPError(403)
-        e2 = copy.copy(e)
-        self.assertIsNot(e, e2)
-        self.assertEqual(e.code, e2.code)
-
-    def test_plain_error(self):
-        e = HTTPError(403)
-        self.assertEqual(str(e), "HTTP 403: Forbidden")
-        self.assertEqual(repr(e), "HTTP 403: Forbidden")
-
-    def test_error_with_response(self):
-        resp = HTTPResponse(HTTPRequest("http://example.com/"), 403)
-        with self.assertRaises(HTTPError) as cm:
-            resp.rethrow()
-        e = cm.exception
-        self.assertEqual(str(e), "HTTP 403: Forbidden")
-        self.assertEqual(repr(e), "HTTP 403: Forbidden")
diff --git a/venv/lib/python3.7/site-packages/tornado/test/httpserver_test.py b/venv/lib/python3.7/site-packages/tornado/test/httpserver_test.py
deleted file mode 100644
index 2a8b6a5..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/httpserver_test.py
+++ /dev/null
@@ -1,1296 +0,0 @@
-from tornado import gen, netutil
-from tornado.escape import (
-    json_decode,
-    json_encode,
-    utf8,
-    _unicode,
-    recursive_unicode,
-    native_str,
-)
-from tornado.http1connection import HTTP1Connection
-from tornado.httpclient import HTTPError
-from tornado.httpserver import HTTPServer
-from tornado.httputil import (
-    HTTPHeaders,
-    HTTPMessageDelegate,
-    HTTPServerConnectionDelegate,
-    ResponseStartLine,
-)
-from tornado.iostream import IOStream
-from tornado.locks import Event
-from tornado.log import gen_log
-from tornado.netutil import ssl_options_to_context
-from tornado.simple_httpclient import SimpleAsyncHTTPClient
-from tornado.testing import (
-    AsyncHTTPTestCase,
-    AsyncHTTPSTestCase,
-    AsyncTestCase,
-    ExpectLog,
-    gen_test,
-)
-from tornado.test.util import skipOnTravis
-from tornado.web import Application, RequestHandler, stream_request_body
-
-from contextlib import closing
-import datetime
-import gzip
-import os
-import shutil
-import socket
-import ssl
-import sys
-import tempfile
-import unittest
-from io import BytesIO
-
-import typing
-
-if typing.TYPE_CHECKING:
-    from typing import Dict, List  # noqa: F401
-
-
-async def read_stream_body(stream):
-    """Reads an HTTP response from `stream` and returns a tuple of its
-    start_line, headers and body."""
-    chunks = []
-
-    class Delegate(HTTPMessageDelegate):
-        def headers_received(self, start_line, headers):
-            self.headers = headers
-            self.start_line = start_line
-
-        def data_received(self, chunk):
-            chunks.append(chunk)
-
-        def finish(self):
-            conn.detach()  # type: ignore
-
-    conn = HTTP1Connection(stream, True)
-    delegate = Delegate()
-    await conn.read_response(delegate)
-    return delegate.start_line, delegate.headers, b"".join(chunks)
-
-
-class HandlerBaseTestCase(AsyncHTTPTestCase):
-    def get_app(self):
-        return Application([("/", self.__class__.Handler)])
-
-    def fetch_json(self, *args, **kwargs):
-        response = self.fetch(*args, **kwargs)
-        response.rethrow()
-        return json_decode(response.body)
-
-
-class HelloWorldRequestHandler(RequestHandler):
-    def initialize(self, protocol="http"):
-        self.expected_protocol = protocol
-
-    def get(self):
-        if self.request.protocol != self.expected_protocol:
-            raise Exception("unexpected protocol")
-        self.finish("Hello world")
-
-    def post(self):
-        self.finish("Got %d bytes in POST" % len(self.request.body))
-
-
-# In pre-1.0 versions of openssl, SSLv23 clients always send SSLv2
-# ClientHello messages, which are rejected by SSLv3 and TLSv1
-# servers.  Note that while the OPENSSL_VERSION_INFO was formally
-# introduced in python3.2, it was present but undocumented in
-# python 2.7
-skipIfOldSSL = unittest.skipIf(
-    getattr(ssl, "OPENSSL_VERSION_INFO", (0, 0)) < (1, 0),
-    "old version of ssl module and/or openssl",
-)
-
-
-class BaseSSLTest(AsyncHTTPSTestCase):
-    def get_app(self):
-        return Application([("/", HelloWorldRequestHandler, dict(protocol="https"))])
-
-
-class SSLTestMixin(object):
-    def get_ssl_options(self):
-        return dict(
-            ssl_version=self.get_ssl_version(),
-            **AsyncHTTPSTestCase.default_ssl_options()
-        )
-
-    def get_ssl_version(self):
-        raise NotImplementedError()
-
-    def test_ssl(self):
-        response = self.fetch("/")
-        self.assertEqual(response.body, b"Hello world")
-
-    def test_large_post(self):
-        response = self.fetch("/", method="POST", body="A" * 5000)
-        self.assertEqual(response.body, b"Got 5000 bytes in POST")
-
-    def test_non_ssl_request(self):
-        # Make sure the server closes the connection when it gets a non-ssl
-        # connection, rather than waiting for a timeout or otherwise
-        # misbehaving.
-        with ExpectLog(gen_log, "(SSL Error|uncaught exception)"):
-            with ExpectLog(gen_log, "Uncaught exception", required=False):
-                with self.assertRaises((IOError, HTTPError)):
-                    self.fetch(
-                        self.get_url("/").replace("https:", "http:"),
-                        request_timeout=3600,
-                        connect_timeout=3600,
-                        raise_error=True,
-                    )
-
-    def test_error_logging(self):
-        # No stack traces are logged for SSL errors.
-        with ExpectLog(gen_log, "SSL Error") as expect_log:
-            with self.assertRaises((IOError, HTTPError)):
-                self.fetch(
-                    self.get_url("/").replace("https:", "http:"), raise_error=True
-                )
-        self.assertFalse(expect_log.logged_stack)
-
-
-# Python's SSL implementation differs significantly between versions.
-# For example, SSLv3 and TLSv1 throw an exception if you try to read
-# from the socket before the handshake is complete, but the default
-# of SSLv23 allows it.
-
-
-class SSLv23Test(BaseSSLTest, SSLTestMixin):
-    def get_ssl_version(self):
-        return ssl.PROTOCOL_SSLv23
-
-
-@skipIfOldSSL
-class SSLv3Test(BaseSSLTest, SSLTestMixin):
-    def get_ssl_version(self):
-        return ssl.PROTOCOL_SSLv3
-
-
-@skipIfOldSSL
-class TLSv1Test(BaseSSLTest, SSLTestMixin):
-    def get_ssl_version(self):
-        return ssl.PROTOCOL_TLSv1
-
-
-class SSLContextTest(BaseSSLTest, SSLTestMixin):
-    def get_ssl_options(self):
-        context = ssl_options_to_context(AsyncHTTPSTestCase.get_ssl_options(self))
-        assert isinstance(context, ssl.SSLContext)
-        return context
-
-
-class BadSSLOptionsTest(unittest.TestCase):
-    def test_missing_arguments(self):
-        application = Application()
-        self.assertRaises(
-            KeyError,
-            HTTPServer,
-            application,
-            ssl_options={"keyfile": "/__missing__.crt"},
-        )
-
-    def test_missing_key(self):
-        """A missing SSL key should cause an immediate exception."""
-
-        application = Application()
-        module_dir = os.path.dirname(__file__)
-        existing_certificate = os.path.join(module_dir, "test.crt")
-        existing_key = os.path.join(module_dir, "test.key")
-
-        self.assertRaises(
-            (ValueError, IOError),
-            HTTPServer,
-            application,
-            ssl_options={"certfile": "/__mising__.crt"},
-        )
-        self.assertRaises(
-            (ValueError, IOError),
-            HTTPServer,
-            application,
-            ssl_options={
-                "certfile": existing_certificate,
-                "keyfile": "/__missing__.key",
-            },
-        )
-
-        # This actually works because both files exist
-        HTTPServer(
-            application,
-            ssl_options={"certfile": existing_certificate, "keyfile": existing_key},
-        )
-
-
-class MultipartTestHandler(RequestHandler):
-    def post(self):
-        self.finish(
-            {
-                "header": self.request.headers["X-Header-Encoding-Test"],
-                "argument": self.get_argument("argument"),
-                "filename": self.request.files["files"][0].filename,
-                "filebody": _unicode(self.request.files["files"][0]["body"]),
-            }
-        )
-
-
-# This test is also called from wsgi_test
-class HTTPConnectionTest(AsyncHTTPTestCase):
-    def get_handlers(self):
-        return [
-            ("/multipart", MultipartTestHandler),
-            ("/hello", HelloWorldRequestHandler),
-        ]
-
-    def get_app(self):
-        return Application(self.get_handlers())
-
-    def raw_fetch(self, headers, body, newline=b"\r\n"):
-        with closing(IOStream(socket.socket())) as stream:
-            self.io_loop.run_sync(
-                lambda: stream.connect(("127.0.0.1", self.get_http_port()))
-            )
-            stream.write(
-                newline.join(headers + [utf8("Content-Length: %d" % len(body))])
-                + newline
-                + newline
-                + body
-            )
-            start_line, headers, body = self.io_loop.run_sync(
-                lambda: read_stream_body(stream)
-            )
-            return body
-
-    def test_multipart_form(self):
-        # Encodings here are tricky:  Headers are latin1, bodies can be
-        # anything (we use utf8 by default).
-        response = self.raw_fetch(
-            [
-                b"POST /multipart HTTP/1.0",
-                b"Content-Type: multipart/form-data; boundary=1234567890",
-                b"X-Header-encoding-test: \xe9",
-            ],
-            b"\r\n".join(
-                [
-                    b"Content-Disposition: form-data; name=argument",
-                    b"",
-                    u"\u00e1".encode("utf-8"),
-                    b"--1234567890",
-                    u'Content-Disposition: form-data; name="files"; filename="\u00f3"'.encode(
-                        "utf8"
-                    ),
-                    b"",
-                    u"\u00fa".encode("utf-8"),
-                    b"--1234567890--",
-                    b"",
-                ]
-            ),
-        )
-        data = json_decode(response)
-        self.assertEqual(u"\u00e9", data["header"])
-        self.assertEqual(u"\u00e1", data["argument"])
-        self.assertEqual(u"\u00f3", data["filename"])
-        self.assertEqual(u"\u00fa", data["filebody"])
-
-    def test_newlines(self):
-        # We support both CRLF and bare LF as line separators.
-        for newline in (b"\r\n", b"\n"):
-            response = self.raw_fetch([b"GET /hello HTTP/1.0"], b"", newline=newline)
-            self.assertEqual(response, b"Hello world")
-
-    @gen_test
-    def test_100_continue(self):
-        # Run through a 100-continue interaction by hand:
-        # When given Expect: 100-continue, we get a 100 response after the
-        # headers, and then the real response after the body.
-        stream = IOStream(socket.socket())
-        yield stream.connect(("127.0.0.1", self.get_http_port()))
-        yield stream.write(
-            b"\r\n".join(
-                [
-                    b"POST /hello HTTP/1.1",
-                    b"Content-Length: 1024",
-                    b"Expect: 100-continue",
-                    b"Connection: close",
-                    b"\r\n",
-                ]
-            )
-        )
-        data = yield stream.read_until(b"\r\n\r\n")
-        self.assertTrue(data.startswith(b"HTTP/1.1 100 "), data)
-        stream.write(b"a" * 1024)
-        first_line = yield stream.read_until(b"\r\n")
-        self.assertTrue(first_line.startswith(b"HTTP/1.1 200"), first_line)
-        header_data = yield stream.read_until(b"\r\n\r\n")
-        headers = HTTPHeaders.parse(native_str(header_data.decode("latin1")))
-        body = yield stream.read_bytes(int(headers["Content-Length"]))
-        self.assertEqual(body, b"Got 1024 bytes in POST")
-        stream.close()
-
-
-class EchoHandler(RequestHandler):
-    def get(self):
-        self.write(recursive_unicode(self.request.arguments))
-
-    def post(self):
-        self.write(recursive_unicode(self.request.arguments))
-
-
-class TypeCheckHandler(RequestHandler):
-    def prepare(self):
-        self.errors = {}  # type: Dict[str, str]
-        fields = [
-            ("method", str),
-            ("uri", str),
-            ("version", str),
-            ("remote_ip", str),
-            ("protocol", str),
-            ("host", str),
-            ("path", str),
-            ("query", str),
-        ]
-        for field, expected_type in fields:
-            self.check_type(field, getattr(self.request, field), expected_type)
-
-        self.check_type("header_key", list(self.request.headers.keys())[0], str)
-        self.check_type("header_value", list(self.request.headers.values())[0], str)
-
-        self.check_type("cookie_key", list(self.request.cookies.keys())[0], str)
-        self.check_type(
-            "cookie_value", list(self.request.cookies.values())[0].value, str
-        )
-        # secure cookies
-
-        self.check_type("arg_key", list(self.request.arguments.keys())[0], str)
-        self.check_type("arg_value", list(self.request.arguments.values())[0][0], bytes)
-
-    def post(self):
-        self.check_type("body", self.request.body, bytes)
-        self.write(self.errors)
-
-    def get(self):
-        self.write(self.errors)
-
-    def check_type(self, name, obj, expected_type):
-        actual_type = type(obj)
-        if expected_type != actual_type:
-            self.errors[name] = "expected %s, got %s" % (expected_type, actual_type)
-
-
-class HTTPServerTest(AsyncHTTPTestCase):
-    def get_app(self):
-        return Application(
-            [
-                ("/echo", EchoHandler),
-                ("/typecheck", TypeCheckHandler),
-                ("//doubleslash", EchoHandler),
-            ]
-        )
-
-    def test_query_string_encoding(self):
-        response = self.fetch("/echo?foo=%C3%A9")
-        data = json_decode(response.body)
-        self.assertEqual(data, {u"foo": [u"\u00e9"]})
-
-    def test_empty_query_string(self):
-        response = self.fetch("/echo?foo=&foo=")
-        data = json_decode(response.body)
-        self.assertEqual(data, {u"foo": [u"", u""]})
-
-    def test_empty_post_parameters(self):
-        response = self.fetch("/echo", method="POST", body="foo=&bar=")
-        data = json_decode(response.body)
-        self.assertEqual(data, {u"foo": [u""], u"bar": [u""]})
-
-    def test_types(self):
-        headers = {"Cookie": "foo=bar"}
-        response = self.fetch("/typecheck?foo=bar", headers=headers)
-        data = json_decode(response.body)
-        self.assertEqual(data, {})
-
-        response = self.fetch(
-            "/typecheck", method="POST", body="foo=bar", headers=headers
-        )
-        data = json_decode(response.body)
-        self.assertEqual(data, {})
-
-    def test_double_slash(self):
-        # urlparse.urlsplit (which tornado.httpserver used to use
-        # incorrectly) would parse paths beginning with "//" as
-        # protocol-relative urls.
-        response = self.fetch("//doubleslash")
-        self.assertEqual(200, response.code)
-        self.assertEqual(json_decode(response.body), {})
-
-    def test_malformed_body(self):
-        # parse_qs is pretty forgiving, but it will fail on python 3
-        # if the data is not utf8.
-        with ExpectLog(gen_log, "Invalid x-www-form-urlencoded body"):
-            response = self.fetch(
-                "/echo",
-                method="POST",
-                headers={"Content-Type": "application/x-www-form-urlencoded"},
-                body=b"\xe9",
-            )
-        self.assertEqual(200, response.code)
-        self.assertEqual(b"{}", response.body)
-
-
-class HTTPServerRawTest(AsyncHTTPTestCase):
-    def get_app(self):
-        return Application([("/echo", EchoHandler)])
-
-    def setUp(self):
-        super(HTTPServerRawTest, self).setUp()
-        self.stream = IOStream(socket.socket())
-        self.io_loop.run_sync(
-            lambda: self.stream.connect(("127.0.0.1", self.get_http_port()))
-        )
-
-    def tearDown(self):
-        self.stream.close()
-        super(HTTPServerRawTest, self).tearDown()
-
-    def test_empty_request(self):
-        self.stream.close()
-        self.io_loop.add_timeout(datetime.timedelta(seconds=0.001), self.stop)
-        self.wait()
-
-    def test_malformed_first_line_response(self):
-        with ExpectLog(gen_log, ".*Malformed HTTP request line"):
-            self.stream.write(b"asdf\r\n\r\n")
-            start_line, headers, response = self.io_loop.run_sync(
-                lambda: read_stream_body(self.stream)
-            )
-            self.assertEqual("HTTP/1.1", start_line.version)
-            self.assertEqual(400, start_line.code)
-            self.assertEqual("Bad Request", start_line.reason)
-
-    def test_malformed_first_line_log(self):
-        with ExpectLog(gen_log, ".*Malformed HTTP request line"):
-            self.stream.write(b"asdf\r\n\r\n")
-            # TODO: need an async version of ExpectLog so we don't need
-            # hard-coded timeouts here.
-            self.io_loop.add_timeout(datetime.timedelta(seconds=0.05), self.stop)
-            self.wait()
-
-    def test_malformed_headers(self):
-        with ExpectLog(gen_log, ".*Malformed HTTP message.*no colon in header line"):
-            self.stream.write(b"GET / HTTP/1.0\r\nasdf\r\n\r\n")
-            self.io_loop.add_timeout(datetime.timedelta(seconds=0.05), self.stop)
-            self.wait()
-
-    def test_chunked_request_body(self):
-        # Chunked requests are not widely supported and we don't have a way
-        # to generate them in AsyncHTTPClient, but HTTPServer will read them.
-        self.stream.write(
-            b"""\
-POST /echo HTTP/1.1
-Transfer-Encoding: chunked
-Content-Type: application/x-www-form-urlencoded
-
-4
-foo=
-3
-bar
-0
-
-""".replace(
-                b"\n", b"\r\n"
-            )
-        )
-        start_line, headers, response = self.io_loop.run_sync(
-            lambda: read_stream_body(self.stream)
-        )
-        self.assertEqual(json_decode(response), {u"foo": [u"bar"]})
-
-    def test_chunked_request_uppercase(self):
-        # As per RFC 2616 section 3.6, "Transfer-Encoding" header's value is
-        # case-insensitive.
-        self.stream.write(
-            b"""\
-POST /echo HTTP/1.1
-Transfer-Encoding: Chunked
-Content-Type: application/x-www-form-urlencoded
-
-4
-foo=
-3
-bar
-0
-
-""".replace(
-                b"\n", b"\r\n"
-            )
-        )
-        start_line, headers, response = self.io_loop.run_sync(
-            lambda: read_stream_body(self.stream)
-        )
-        self.assertEqual(json_decode(response), {u"foo": [u"bar"]})
-
-    @gen_test
-    def test_invalid_content_length(self):
-        with ExpectLog(gen_log, ".*Only integer Content-Length is allowed"):
-            self.stream.write(
-                b"""\
-POST /echo HTTP/1.1
-Content-Length: foo
-
-bar
-
-""".replace(
-                    b"\n", b"\r\n"
-                )
-            )
-            yield self.stream.read_until_close()
-
-
-class XHeaderTest(HandlerBaseTestCase):
-    class Handler(RequestHandler):
-        def get(self):
-            self.set_header("request-version", self.request.version)
-            self.write(
-                dict(
-                    remote_ip=self.request.remote_ip,
-                    remote_protocol=self.request.protocol,
-                )
-            )
-
-    def get_httpserver_options(self):
-        return dict(xheaders=True, trusted_downstream=["5.5.5.5"])
-
-    def test_ip_headers(self):
-        self.assertEqual(self.fetch_json("/")["remote_ip"], "127.0.0.1")
-
-        valid_ipv4 = {"X-Real-IP": "4.4.4.4"}
-        self.assertEqual(
-            self.fetch_json("/", headers=valid_ipv4)["remote_ip"], "4.4.4.4"
-        )
-
-        valid_ipv4_list = {"X-Forwarded-For": "127.0.0.1, 4.4.4.4"}
-        self.assertEqual(
-            self.fetch_json("/", headers=valid_ipv4_list)["remote_ip"], "4.4.4.4"
-        )
-
-        valid_ipv6 = {"X-Real-IP": "2620:0:1cfe:face:b00c::3"}
-        self.assertEqual(
-            self.fetch_json("/", headers=valid_ipv6)["remote_ip"],
-            "2620:0:1cfe:face:b00c::3",
-        )
-
-        valid_ipv6_list = {"X-Forwarded-For": "::1, 2620:0:1cfe:face:b00c::3"}
-        self.assertEqual(
-            self.fetch_json("/", headers=valid_ipv6_list)["remote_ip"],
-            "2620:0:1cfe:face:b00c::3",
-        )
-
-        invalid_chars = {"X-Real-IP": "4.4.4.4<script>"}
-        self.assertEqual(
-            self.fetch_json("/", headers=invalid_chars)["remote_ip"], "127.0.0.1"
-        )
-
-        invalid_chars_list = {"X-Forwarded-For": "4.4.4.4, 5.5.5.5<script>"}
-        self.assertEqual(
-            self.fetch_json("/", headers=invalid_chars_list)["remote_ip"], "127.0.0.1"
-        )
-
-        invalid_host = {"X-Real-IP": "www.google.com"}
-        self.assertEqual(
-            self.fetch_json("/", headers=invalid_host)["remote_ip"], "127.0.0.1"
-        )
-
-    def test_trusted_downstream(self):
-        valid_ipv4_list = {"X-Forwarded-For": "127.0.0.1, 4.4.4.4, 5.5.5.5"}
-        resp = self.fetch("/", headers=valid_ipv4_list)
-        if resp.headers["request-version"].startswith("HTTP/2"):
-            # This is a hack - there's nothing that fundamentally requires http/1
-            # here but tornado_http2 doesn't support it yet.
-            self.skipTest("requires HTTP/1.x")
-        result = json_decode(resp.body)
-        self.assertEqual(result["remote_ip"], "4.4.4.4")
-
-    def test_scheme_headers(self):
-        self.assertEqual(self.fetch_json("/")["remote_protocol"], "http")
-
-        https_scheme = {"X-Scheme": "https"}
-        self.assertEqual(
-            self.fetch_json("/", headers=https_scheme)["remote_protocol"], "https"
-        )
-
-        https_forwarded = {"X-Forwarded-Proto": "https"}
-        self.assertEqual(
-            self.fetch_json("/", headers=https_forwarded)["remote_protocol"], "https"
-        )
-
-        https_multi_forwarded = {"X-Forwarded-Proto": "https , http"}
-        self.assertEqual(
-            self.fetch_json("/", headers=https_multi_forwarded)["remote_protocol"],
-            "http",
-        )
-
-        http_multi_forwarded = {"X-Forwarded-Proto": "http,https"}
-        self.assertEqual(
-            self.fetch_json("/", headers=http_multi_forwarded)["remote_protocol"],
-            "https",
-        )
-
-        bad_forwarded = {"X-Forwarded-Proto": "unknown"}
-        self.assertEqual(
-            self.fetch_json("/", headers=bad_forwarded)["remote_protocol"], "http"
-        )
-
-
-class SSLXHeaderTest(AsyncHTTPSTestCase, HandlerBaseTestCase):
-    def get_app(self):
-        return Application([("/", XHeaderTest.Handler)])
-
-    def get_httpserver_options(self):
-        output = super(SSLXHeaderTest, self).get_httpserver_options()
-        output["xheaders"] = True
-        return output
-
-    def test_request_without_xprotocol(self):
-        self.assertEqual(self.fetch_json("/")["remote_protocol"], "https")
-
-        http_scheme = {"X-Scheme": "http"}
-        self.assertEqual(
-            self.fetch_json("/", headers=http_scheme)["remote_protocol"], "http"
-        )
-
-        bad_scheme = {"X-Scheme": "unknown"}
-        self.assertEqual(
-            self.fetch_json("/", headers=bad_scheme)["remote_protocol"], "https"
-        )
-
-
-class ManualProtocolTest(HandlerBaseTestCase):
-    class Handler(RequestHandler):
-        def get(self):
-            self.write(dict(protocol=self.request.protocol))
-
-    def get_httpserver_options(self):
-        return dict(protocol="https")
-
-    def test_manual_protocol(self):
-        self.assertEqual(self.fetch_json("/")["protocol"], "https")
-
-
-@unittest.skipIf(
-    not hasattr(socket, "AF_UNIX") or sys.platform == "cygwin",
-    "unix sockets not supported on this platform",
-)
-class UnixSocketTest(AsyncTestCase):
-    """HTTPServers can listen on Unix sockets too.
-
-    Why would you want to do this?  Nginx can proxy to backends listening
-    on unix sockets, for one thing (and managing a namespace for unix
-    sockets can be easier than managing a bunch of TCP port numbers).
-
-    Unfortunately, there's no way to specify a unix socket in a url for
-    an HTTP client, so we have to test this by hand.
-    """
-
-    def setUp(self):
-        super(UnixSocketTest, self).setUp()
-        self.tmpdir = tempfile.mkdtemp()
-        self.sockfile = os.path.join(self.tmpdir, "test.sock")
-        sock = netutil.bind_unix_socket(self.sockfile)
-        app = Application([("/hello", HelloWorldRequestHandler)])
-        self.server = HTTPServer(app)
-        self.server.add_socket(sock)
-        self.stream = IOStream(socket.socket(socket.AF_UNIX))
-        self.io_loop.run_sync(lambda: self.stream.connect(self.sockfile))
-
-    def tearDown(self):
-        self.stream.close()
-        self.io_loop.run_sync(self.server.close_all_connections)
-        self.server.stop()
-        shutil.rmtree(self.tmpdir)
-        super(UnixSocketTest, self).tearDown()
-
-    @gen_test
-    def test_unix_socket(self):
-        self.stream.write(b"GET /hello HTTP/1.0\r\n\r\n")
-        response = yield self.stream.read_until(b"\r\n")
-        self.assertEqual(response, b"HTTP/1.1 200 OK\r\n")
-        header_data = yield self.stream.read_until(b"\r\n\r\n")
-        headers = HTTPHeaders.parse(header_data.decode("latin1"))
-        body = yield self.stream.read_bytes(int(headers["Content-Length"]))
-        self.assertEqual(body, b"Hello world")
-
-    @gen_test
-    def test_unix_socket_bad_request(self):
-        # Unix sockets don't have remote addresses so they just return an
-        # empty string.
-        with ExpectLog(gen_log, "Malformed HTTP message from"):
-            self.stream.write(b"garbage\r\n\r\n")
-            response = yield self.stream.read_until_close()
-        self.assertEqual(response, b"HTTP/1.1 400 Bad Request\r\n\r\n")
-
-
-class KeepAliveTest(AsyncHTTPTestCase):
-    """Tests various scenarios for HTTP 1.1 keep-alive support.
-
-    These tests don't use AsyncHTTPClient because we want to control
-    connection reuse and closing.
-    """
-
-    def get_app(self):
-        class HelloHandler(RequestHandler):
-            def get(self):
-                self.finish("Hello world")
-
-            def post(self):
-                self.finish("Hello world")
-
-        class LargeHandler(RequestHandler):
-            def get(self):
-                # 512KB should be bigger than the socket buffers so it will
-                # be written out in chunks.
-                self.write("".join(chr(i % 256) * 1024 for i in range(512)))
-
-        class FinishOnCloseHandler(RequestHandler):
-            def initialize(self, cleanup_event):
-                self.cleanup_event = cleanup_event
-
-            @gen.coroutine
-            def get(self):
-                self.flush()
-                yield self.cleanup_event.wait()
-
-            def on_connection_close(self):
-                # This is not very realistic, but finishing the request
-                # from the close callback has the right timing to mimic
-                # some errors seen in the wild.
-                self.finish("closed")
-
-        self.cleanup_event = Event()
-        return Application(
-            [
-                ("/", HelloHandler),
-                ("/large", LargeHandler),
-                (
-                    "/finish_on_close",
-                    FinishOnCloseHandler,
-                    dict(cleanup_event=self.cleanup_event),
-                ),
-            ]
-        )
-
-    def setUp(self):
-        super(KeepAliveTest, self).setUp()
-        self.http_version = b"HTTP/1.1"
-
-    def tearDown(self):
-        # We just closed the client side of the socket; let the IOLoop run
-        # once to make sure the server side got the message.
-        self.io_loop.add_timeout(datetime.timedelta(seconds=0.001), self.stop)
-        self.wait()
-
-        if hasattr(self, "stream"):
-            self.stream.close()
-        super(KeepAliveTest, self).tearDown()
-
-    # The next few methods are a crude manual http client
-    @gen.coroutine
-    def connect(self):
-        self.stream = IOStream(socket.socket())
-        yield self.stream.connect(("127.0.0.1", self.get_http_port()))
-
-    @gen.coroutine
-    def read_headers(self):
-        first_line = yield self.stream.read_until(b"\r\n")
-        self.assertTrue(first_line.startswith(b"HTTP/1.1 200"), first_line)
-        header_bytes = yield self.stream.read_until(b"\r\n\r\n")
-        headers = HTTPHeaders.parse(header_bytes.decode("latin1"))
-        raise gen.Return(headers)
-
-    @gen.coroutine
-    def read_response(self):
-        self.headers = yield self.read_headers()
-        body = yield self.stream.read_bytes(int(self.headers["Content-Length"]))
-        self.assertEqual(b"Hello world", body)
-
-    def close(self):
-        self.stream.close()
-        del self.stream
-
-    @gen_test
-    def test_two_requests(self):
-        yield self.connect()
-        self.stream.write(b"GET / HTTP/1.1\r\n\r\n")
-        yield self.read_response()
-        self.stream.write(b"GET / HTTP/1.1\r\n\r\n")
-        yield self.read_response()
-        self.close()
-
-    @gen_test
-    def test_request_close(self):
-        yield self.connect()
-        self.stream.write(b"GET / HTTP/1.1\r\nConnection: close\r\n\r\n")
-        yield self.read_response()
-        data = yield self.stream.read_until_close()
-        self.assertTrue(not data)
-        self.assertEqual(self.headers["Connection"], "close")
-        self.close()
-
-    # keepalive is supported for http 1.0 too, but it's opt-in
-    @gen_test
-    def test_http10(self):
-        self.http_version = b"HTTP/1.0"
-        yield self.connect()
-        self.stream.write(b"GET / HTTP/1.0\r\n\r\n")
-        yield self.read_response()
-        data = yield self.stream.read_until_close()
-        self.assertTrue(not data)
-        self.assertTrue("Connection" not in self.headers)
-        self.close()
-
-    @gen_test
-    def test_http10_keepalive(self):
-        self.http_version = b"HTTP/1.0"
-        yield self.connect()
-        self.stream.write(b"GET / HTTP/1.0\r\nConnection: keep-alive\r\n\r\n")
-        yield self.read_response()
-        self.assertEqual(self.headers["Connection"], "Keep-Alive")
-        self.stream.write(b"GET / HTTP/1.0\r\nConnection: keep-alive\r\n\r\n")
-        yield self.read_response()
-        self.assertEqual(self.headers["Connection"], "Keep-Alive")
-        self.close()
-
-    @gen_test
-    def test_http10_keepalive_extra_crlf(self):
-        self.http_version = b"HTTP/1.0"
-        yield self.connect()
-        self.stream.write(b"GET / HTTP/1.0\r\nConnection: keep-alive\r\n\r\n\r\n")
-        yield self.read_response()
-        self.assertEqual(self.headers["Connection"], "Keep-Alive")
-        self.stream.write(b"GET / HTTP/1.0\r\nConnection: keep-alive\r\n\r\n")
-        yield self.read_response()
-        self.assertEqual(self.headers["Connection"], "Keep-Alive")
-        self.close()
-
-    @gen_test
-    def test_pipelined_requests(self):
-        yield self.connect()
-        self.stream.write(b"GET / HTTP/1.1\r\n\r\nGET / HTTP/1.1\r\n\r\n")
-        yield self.read_response()
-        yield self.read_response()
-        self.close()
-
-    @gen_test
-    def test_pipelined_cancel(self):
-        yield self.connect()
-        self.stream.write(b"GET / HTTP/1.1\r\n\r\nGET / HTTP/1.1\r\n\r\n")
-        # only read once
-        yield self.read_response()
-        self.close()
-
-    @gen_test
-    def test_cancel_during_download(self):
-        yield self.connect()
-        self.stream.write(b"GET /large HTTP/1.1\r\n\r\n")
-        yield self.read_headers()
-        yield self.stream.read_bytes(1024)
-        self.close()
-
-    @gen_test
-    def test_finish_while_closed(self):
-        yield self.connect()
-        self.stream.write(b"GET /finish_on_close HTTP/1.1\r\n\r\n")
-        yield self.read_headers()
-        self.close()
-        # Let the hanging coroutine clean up after itself
-        self.cleanup_event.set()
-
-    @gen_test
-    def test_keepalive_chunked(self):
-        self.http_version = b"HTTP/1.0"
-        yield self.connect()
-        self.stream.write(
-            b"POST / HTTP/1.0\r\n"
-            b"Connection: keep-alive\r\n"
-            b"Transfer-Encoding: chunked\r\n"
-            b"\r\n"
-            b"0\r\n"
-            b"\r\n"
-        )
-        yield self.read_response()
-        self.assertEqual(self.headers["Connection"], "Keep-Alive")
-        self.stream.write(b"GET / HTTP/1.0\r\nConnection: keep-alive\r\n\r\n")
-        yield self.read_response()
-        self.assertEqual(self.headers["Connection"], "Keep-Alive")
-        self.close()
-
-
-class GzipBaseTest(object):
-    def get_app(self):
-        return Application([("/", EchoHandler)])
-
-    def post_gzip(self, body):
-        bytesio = BytesIO()
-        gzip_file = gzip.GzipFile(mode="w", fileobj=bytesio)
-        gzip_file.write(utf8(body))
-        gzip_file.close()
-        compressed_body = bytesio.getvalue()
-        return self.fetch(
-            "/",
-            method="POST",
-            body=compressed_body,
-            headers={"Content-Encoding": "gzip"},
-        )
-
-    def test_uncompressed(self):
-        response = self.fetch("/", method="POST", body="foo=bar")
-        self.assertEquals(json_decode(response.body), {u"foo": [u"bar"]})
-
-
-class GzipTest(GzipBaseTest, AsyncHTTPTestCase):
-    def get_httpserver_options(self):
-        return dict(decompress_request=True)
-
-    def test_gzip(self):
-        response = self.post_gzip("foo=bar")
-        self.assertEquals(json_decode(response.body), {u"foo": [u"bar"]})
-
-
-class GzipUnsupportedTest(GzipBaseTest, AsyncHTTPTestCase):
-    def test_gzip_unsupported(self):
-        # Gzip support is opt-in; without it the server fails to parse
-        # the body (but parsing form bodies is currently just a log message,
-        # not a fatal error).
-        with ExpectLog(gen_log, "Unsupported Content-Encoding"):
-            response = self.post_gzip("foo=bar")
-        self.assertEquals(json_decode(response.body), {})
-
-
-class StreamingChunkSizeTest(AsyncHTTPTestCase):
-    # 50 characters long, and repetitive so it can be compressed.
-    BODY = b"01234567890123456789012345678901234567890123456789"
-    CHUNK_SIZE = 16
-
-    def get_http_client(self):
-        # body_producer doesn't work on curl_httpclient, so override the
-        # configured AsyncHTTPClient implementation.
-        return SimpleAsyncHTTPClient()
-
-    def get_httpserver_options(self):
-        return dict(chunk_size=self.CHUNK_SIZE, decompress_request=True)
-
-    class MessageDelegate(HTTPMessageDelegate):
-        def __init__(self, connection):
-            self.connection = connection
-
-        def headers_received(self, start_line, headers):
-            self.chunk_lengths = []  # type: List[int]
-
-        def data_received(self, chunk):
-            self.chunk_lengths.append(len(chunk))
-
-        def finish(self):
-            response_body = utf8(json_encode(self.chunk_lengths))
-            self.connection.write_headers(
-                ResponseStartLine("HTTP/1.1", 200, "OK"),
-                HTTPHeaders({"Content-Length": str(len(response_body))}),
-            )
-            self.connection.write(response_body)
-            self.connection.finish()
-
-    def get_app(self):
-        class App(HTTPServerConnectionDelegate):
-            def start_request(self, server_conn, request_conn):
-                return StreamingChunkSizeTest.MessageDelegate(request_conn)
-
-        return App()
-
-    def fetch_chunk_sizes(self, **kwargs):
-        response = self.fetch("/", method="POST", **kwargs)
-        response.rethrow()
-        chunks = json_decode(response.body)
-        self.assertEqual(len(self.BODY), sum(chunks))
-        for chunk_size in chunks:
-            self.assertLessEqual(
-                chunk_size, self.CHUNK_SIZE, "oversized chunk: " + str(chunks)
-            )
-            self.assertGreater(chunk_size, 0, "empty chunk: " + str(chunks))
-        return chunks
-
-    def compress(self, body):
-        bytesio = BytesIO()
-        gzfile = gzip.GzipFile(mode="w", fileobj=bytesio)
-        gzfile.write(body)
-        gzfile.close()
-        compressed = bytesio.getvalue()
-        if len(compressed) >= len(body):
-            raise Exception("body did not shrink when compressed")
-        return compressed
-
-    def test_regular_body(self):
-        chunks = self.fetch_chunk_sizes(body=self.BODY)
-        # Without compression we know exactly what to expect.
-        self.assertEqual([16, 16, 16, 2], chunks)
-
-    def test_compressed_body(self):
-        self.fetch_chunk_sizes(
-            body=self.compress(self.BODY), headers={"Content-Encoding": "gzip"}
-        )
-        # Compression creates irregular boundaries so the assertions
-        # in fetch_chunk_sizes are as specific as we can get.
-
-    def test_chunked_body(self):
-        def body_producer(write):
-            write(self.BODY[:20])
-            write(self.BODY[20:])
-
-        chunks = self.fetch_chunk_sizes(body_producer=body_producer)
-        # HTTP chunk boundaries translate to application-visible breaks
-        self.assertEqual([16, 4, 16, 14], chunks)
-
-    def test_chunked_compressed(self):
-        compressed = self.compress(self.BODY)
-        self.assertGreater(len(compressed), 20)
-
-        def body_producer(write):
-            write(compressed[:20])
-            write(compressed[20:])
-
-        self.fetch_chunk_sizes(
-            body_producer=body_producer, headers={"Content-Encoding": "gzip"}
-        )
-
-
-class MaxHeaderSizeTest(AsyncHTTPTestCase):
-    def get_app(self):
-        return Application([("/", HelloWorldRequestHandler)])
-
-    def get_httpserver_options(self):
-        return dict(max_header_size=1024)
-
-    def test_small_headers(self):
-        response = self.fetch("/", headers={"X-Filler": "a" * 100})
-        response.rethrow()
-        self.assertEqual(response.body, b"Hello world")
-
-    def test_large_headers(self):
-        with ExpectLog(gen_log, "Unsatisfiable read", required=False):
-            try:
-                self.fetch("/", headers={"X-Filler": "a" * 1000}, raise_error=True)
-                self.fail("did not raise expected exception")
-            except HTTPError as e:
-                # 431 is "Request Header Fields Too Large", defined in RFC
-                # 6585. However, many implementations just close the
-                # connection in this case, resulting in a missing response.
-                if e.response is not None:
-                    self.assertIn(e.response.code, (431, 599))
-
-
-@skipOnTravis
-class IdleTimeoutTest(AsyncHTTPTestCase):
-    def get_app(self):
-        return Application([("/", HelloWorldRequestHandler)])
-
-    def get_httpserver_options(self):
-        return dict(idle_connection_timeout=0.1)
-
-    def setUp(self):
-        super(IdleTimeoutTest, self).setUp()
-        self.streams = []  # type: List[IOStream]
-
-    def tearDown(self):
-        super(IdleTimeoutTest, self).tearDown()
-        for stream in self.streams:
-            stream.close()
-
-    @gen.coroutine
-    def connect(self):
-        stream = IOStream(socket.socket())
-        yield stream.connect(("127.0.0.1", self.get_http_port()))
-        self.streams.append(stream)
-        raise gen.Return(stream)
-
-    @gen_test
-    def test_unused_connection(self):
-        stream = yield self.connect()
-        event = Event()
-        stream.set_close_callback(event.set)
-        yield event.wait()
-
-    @gen_test
-    def test_idle_after_use(self):
-        stream = yield self.connect()
-        event = Event()
-        stream.set_close_callback(event.set)
-
-        # Use the connection twice to make sure keep-alives are working
-        for i in range(2):
-            stream.write(b"GET / HTTP/1.1\r\n\r\n")
-            yield stream.read_until(b"\r\n\r\n")
-            data = yield stream.read_bytes(11)
-            self.assertEqual(data, b"Hello world")
-
-        # Now let the timeout trigger and close the connection.
-        yield event.wait()
-
-
-class BodyLimitsTest(AsyncHTTPTestCase):
-    def get_app(self):
-        class BufferedHandler(RequestHandler):
-            def put(self):
-                self.write(str(len(self.request.body)))
-
-        @stream_request_body
-        class StreamingHandler(RequestHandler):
-            def initialize(self):
-                self.bytes_read = 0
-
-            def prepare(self):
-                if "expected_size" in self.request.arguments:
-                    self.request.connection.set_max_body_size(
-                        int(self.get_argument("expected_size"))
-                    )
-                if "body_timeout" in self.request.arguments:
-                    self.request.connection.set_body_timeout(
-                        float(self.get_argument("body_timeout"))
-                    )
-
-            def data_received(self, data):
-                self.bytes_read += len(data)
-
-            def put(self):
-                self.write(str(self.bytes_read))
-
-        return Application(
-            [("/buffered", BufferedHandler), ("/streaming", StreamingHandler)]
-        )
-
-    def get_httpserver_options(self):
-        return dict(body_timeout=3600, max_body_size=4096)
-
-    def get_http_client(self):
-        # body_producer doesn't work on curl_httpclient, so override the
-        # configured AsyncHTTPClient implementation.
-        return SimpleAsyncHTTPClient()
-
-    def test_small_body(self):
-        response = self.fetch("/buffered", method="PUT", body=b"a" * 4096)
-        self.assertEqual(response.body, b"4096")
-        response = self.fetch("/streaming", method="PUT", body=b"a" * 4096)
-        self.assertEqual(response.body, b"4096")
-
-    def test_large_body_buffered(self):
-        with ExpectLog(gen_log, ".*Content-Length too long"):
-            response = self.fetch("/buffered", method="PUT", body=b"a" * 10240)
-        self.assertEqual(response.code, 400)
-
-    @unittest.skipIf(os.name == "nt", "flaky on windows")
-    def test_large_body_buffered_chunked(self):
-        # This test is flaky on windows for unknown reasons.
-        with ExpectLog(gen_log, ".*chunked body too large"):
-            response = self.fetch(
-                "/buffered",
-                method="PUT",
-                body_producer=lambda write: write(b"a" * 10240),
-            )
-        self.assertEqual(response.code, 400)
-
-    def test_large_body_streaming(self):
-        with ExpectLog(gen_log, ".*Content-Length too long"):
-            response = self.fetch("/streaming", method="PUT", body=b"a" * 10240)
-        self.assertEqual(response.code, 400)
-
-    @unittest.skipIf(os.name == "nt", "flaky on windows")
-    def test_large_body_streaming_chunked(self):
-        with ExpectLog(gen_log, ".*chunked body too large"):
-            response = self.fetch(
-                "/streaming",
-                method="PUT",
-                body_producer=lambda write: write(b"a" * 10240),
-            )
-        self.assertEqual(response.code, 400)
-
-    def test_large_body_streaming_override(self):
-        response = self.fetch(
-            "/streaming?expected_size=10240", method="PUT", body=b"a" * 10240
-        )
-        self.assertEqual(response.body, b"10240")
-
-    def test_large_body_streaming_chunked_override(self):
-        response = self.fetch(
-            "/streaming?expected_size=10240",
-            method="PUT",
-            body_producer=lambda write: write(b"a" * 10240),
-        )
-        self.assertEqual(response.body, b"10240")
-
-    @gen_test
-    def test_timeout(self):
-        stream = IOStream(socket.socket())
-        try:
-            yield stream.connect(("127.0.0.1", self.get_http_port()))
-            # Use a raw stream because AsyncHTTPClient won't let us read a
-            # response without finishing a body.
-            stream.write(
-                b"PUT /streaming?body_timeout=0.1 HTTP/1.0\r\n"
-                b"Content-Length: 42\r\n\r\n"
-            )
-            with ExpectLog(gen_log, "Timeout reading body"):
-                response = yield stream.read_until_close()
-            self.assertEqual(response, b"")
-        finally:
-            stream.close()
-
-    @gen_test
-    def test_body_size_override_reset(self):
-        # The max_body_size override is reset between requests.
-        stream = IOStream(socket.socket())
-        try:
-            yield stream.connect(("127.0.0.1", self.get_http_port()))
-            # Use a raw stream so we can make sure it's all on one connection.
-            stream.write(
-                b"PUT /streaming?expected_size=10240 HTTP/1.1\r\n"
-                b"Content-Length: 10240\r\n\r\n"
-            )
-            stream.write(b"a" * 10240)
-            start_line, headers, response = yield read_stream_body(stream)
-            self.assertEqual(response, b"10240")
-            # Without the ?expected_size parameter, we get the old default value
-            stream.write(
-                b"PUT /streaming HTTP/1.1\r\n" b"Content-Length: 10240\r\n\r\n"
-            )
-            with ExpectLog(gen_log, ".*Content-Length too long"):
-                data = yield stream.read_until_close()
-            self.assertEqual(data, b"HTTP/1.1 400 Bad Request\r\n\r\n")
-        finally:
-            stream.close()
-
-
-class LegacyInterfaceTest(AsyncHTTPTestCase):
-    def get_app(self):
-        # The old request_callback interface does not implement the
-        # delegate interface, and writes its response via request.write
-        # instead of request.connection.write_headers.
-        def handle_request(request):
-            self.http1 = request.version.startswith("HTTP/1.")
-            if not self.http1:
-                # This test will be skipped if we're using HTTP/2,
-                # so just close it out cleanly using the modern interface.
-                request.connection.write_headers(
-                    ResponseStartLine("", 200, "OK"), HTTPHeaders()
-                )
-                request.connection.finish()
-                return
-            message = b"Hello world"
-            request.connection.write(
-                utf8("HTTP/1.1 200 OK\r\n" "Content-Length: %d\r\n\r\n" % len(message))
-            )
-            request.connection.write(message)
-            request.connection.finish()
-
-        return handle_request
-
-    def test_legacy_interface(self):
-        response = self.fetch("/")
-        if not self.http1:
-            self.skipTest("requires HTTP/1.x")
-        self.assertEqual(response.body, b"Hello world")
diff --git a/venv/lib/python3.7/site-packages/tornado/test/httputil_test.py b/venv/lib/python3.7/site-packages/tornado/test/httputil_test.py
deleted file mode 100644
index c094a09..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/httputil_test.py
+++ /dev/null
@@ -1,522 +0,0 @@
-# -*- coding: utf-8 -*-
-from tornado.httputil import (
-    url_concat,
-    parse_multipart_form_data,
-    HTTPHeaders,
-    format_timestamp,
-    HTTPServerRequest,
-    parse_request_start_line,
-    parse_cookie,
-    qs_to_qsl,
-    HTTPInputError,
-    HTTPFile,
-)
-from tornado.escape import utf8, native_str
-from tornado.log import gen_log
-from tornado.testing import ExpectLog
-
-import copy
-import datetime
-import logging
-import pickle
-import time
-import urllib.parse
-import unittest
-
-from typing import Tuple, Dict, List
-
-
-def form_data_args() -> Tuple[Dict[str, List[bytes]], Dict[str, List[HTTPFile]]]:
-    """Return two empty dicts suitable for use with parse_multipart_form_data.
-
-    mypy insists on type annotations for dict literals, so this lets us avoid
-    the verbose types throughout this test.
-    """
-    return {}, {}
-
-
-class TestUrlConcat(unittest.TestCase):
-    def test_url_concat_no_query_params(self):
-        url = url_concat("https://localhost/path", [("y", "y"), ("z", "z")])
-        self.assertEqual(url, "https://localhost/path?y=y&z=z")
-
-    def test_url_concat_encode_args(self):
-        url = url_concat("https://localhost/path", [("y", "/y"), ("z", "z")])
-        self.assertEqual(url, "https://localhost/path?y=%2Fy&z=z")
-
-    def test_url_concat_trailing_q(self):
-        url = url_concat("https://localhost/path?", [("y", "y"), ("z", "z")])
-        self.assertEqual(url, "https://localhost/path?y=y&z=z")
-
-    def test_url_concat_q_with_no_trailing_amp(self):
-        url = url_concat("https://localhost/path?x", [("y", "y"), ("z", "z")])
-        self.assertEqual(url, "https://localhost/path?x=&y=y&z=z")
-
-    def test_url_concat_trailing_amp(self):
-        url = url_concat("https://localhost/path?x&", [("y", "y"), ("z", "z")])
-        self.assertEqual(url, "https://localhost/path?x=&y=y&z=z")
-
-    def test_url_concat_mult_params(self):
-        url = url_concat("https://localhost/path?a=1&b=2", [("y", "y"), ("z", "z")])
-        self.assertEqual(url, "https://localhost/path?a=1&b=2&y=y&z=z")
-
-    def test_url_concat_no_params(self):
-        url = url_concat("https://localhost/path?r=1&t=2", [])
-        self.assertEqual(url, "https://localhost/path?r=1&t=2")
-
-    def test_url_concat_none_params(self):
-        url = url_concat("https://localhost/path?r=1&t=2", None)
-        self.assertEqual(url, "https://localhost/path?r=1&t=2")
-
-    def test_url_concat_with_frag(self):
-        url = url_concat("https://localhost/path#tab", [("y", "y")])
-        self.assertEqual(url, "https://localhost/path?y=y#tab")
-
-    def test_url_concat_multi_same_params(self):
-        url = url_concat("https://localhost/path", [("y", "y1"), ("y", "y2")])
-        self.assertEqual(url, "https://localhost/path?y=y1&y=y2")
-
-    def test_url_concat_multi_same_query_params(self):
-        url = url_concat("https://localhost/path?r=1&r=2", [("y", "y")])
-        self.assertEqual(url, "https://localhost/path?r=1&r=2&y=y")
-
-    def test_url_concat_dict_params(self):
-        url = url_concat("https://localhost/path", dict(y="y"))
-        self.assertEqual(url, "https://localhost/path?y=y")
-
-
-class QsParseTest(unittest.TestCase):
-    def test_parsing(self):
-        qsstring = "a=1&b=2&a=3"
-        qs = urllib.parse.parse_qs(qsstring)
-        qsl = list(qs_to_qsl(qs))
-        self.assertIn(("a", "1"), qsl)
-        self.assertIn(("a", "3"), qsl)
-        self.assertIn(("b", "2"), qsl)
-
-
-class MultipartFormDataTest(unittest.TestCase):
-    def test_file_upload(self):
-        data = b"""\
---1234
-Content-Disposition: form-data; name="files"; filename="ab.txt"
-
-Foo
---1234--""".replace(
-            b"\n", b"\r\n"
-        )
-        args, files = form_data_args()
-        parse_multipart_form_data(b"1234", data, args, files)
-        file = files["files"][0]
-        self.assertEqual(file["filename"], "ab.txt")
-        self.assertEqual(file["body"], b"Foo")
-
-    def test_unquoted_names(self):
-        # quotes are optional unless special characters are present
-        data = b"""\
---1234
-Content-Disposition: form-data; name=files; filename=ab.txt
-
-Foo
---1234--""".replace(
-            b"\n", b"\r\n"
-        )
-        args, files = form_data_args()
-        parse_multipart_form_data(b"1234", data, args, files)
-        file = files["files"][0]
-        self.assertEqual(file["filename"], "ab.txt")
-        self.assertEqual(file["body"], b"Foo")
-
-    def test_special_filenames(self):
-        filenames = [
-            "a;b.txt",
-            'a"b.txt',
-            'a";b.txt',
-            'a;"b.txt',
-            'a";";.txt',
-            'a\\"b.txt',
-            "a\\b.txt",
-        ]
-        for filename in filenames:
-            logging.debug("trying filename %r", filename)
-            str_data = """\
---1234
-Content-Disposition: form-data; name="files"; filename="%s"
-
-Foo
---1234--""" % filename.replace(
-                "\\", "\\\\"
-            ).replace(
-                '"', '\\"'
-            )
-            data = utf8(str_data.replace("\n", "\r\n"))
-            args, files = form_data_args()
-            parse_multipart_form_data(b"1234", data, args, files)
-            file = files["files"][0]
-            self.assertEqual(file["filename"], filename)
-            self.assertEqual(file["body"], b"Foo")
-
-    def test_non_ascii_filename(self):
-        data = b"""\
---1234
-Content-Disposition: form-data; name="files"; filename="ab.txt"; filename*=UTF-8''%C3%A1b.txt
-
-Foo
---1234--""".replace(
-            b"\n", b"\r\n"
-        )
-        args, files = form_data_args()
-        parse_multipart_form_data(b"1234", data, args, files)
-        file = files["files"][0]
-        self.assertEqual(file["filename"], u"áb.txt")
-        self.assertEqual(file["body"], b"Foo")
-
-    def test_boundary_starts_and_ends_with_quotes(self):
-        data = b"""\
---1234
-Content-Disposition: form-data; name="files"; filename="ab.txt"
-
-Foo
---1234--""".replace(
-            b"\n", b"\r\n"
-        )
-        args, files = form_data_args()
-        parse_multipart_form_data(b'"1234"', data, args, files)
-        file = files["files"][0]
-        self.assertEqual(file["filename"], "ab.txt")
-        self.assertEqual(file["body"], b"Foo")
-
-    def test_missing_headers(self):
-        data = b"""\
---1234
-
-Foo
---1234--""".replace(
-            b"\n", b"\r\n"
-        )
-        args, files = form_data_args()
-        with ExpectLog(gen_log, "multipart/form-data missing headers"):
-            parse_multipart_form_data(b"1234", data, args, files)
-        self.assertEqual(files, {})
-
-    def test_invalid_content_disposition(self):
-        data = b"""\
---1234
-Content-Disposition: invalid; name="files"; filename="ab.txt"
-
-Foo
---1234--""".replace(
-            b"\n", b"\r\n"
-        )
-        args, files = form_data_args()
-        with ExpectLog(gen_log, "Invalid multipart/form-data"):
-            parse_multipart_form_data(b"1234", data, args, files)
-        self.assertEqual(files, {})
-
-    def test_line_does_not_end_with_correct_line_break(self):
-        data = b"""\
---1234
-Content-Disposition: form-data; name="files"; filename="ab.txt"
-
-Foo--1234--""".replace(
-            b"\n", b"\r\n"
-        )
-        args, files = form_data_args()
-        with ExpectLog(gen_log, "Invalid multipart/form-data"):
-            parse_multipart_form_data(b"1234", data, args, files)
-        self.assertEqual(files, {})
-
-    def test_content_disposition_header_without_name_parameter(self):
-        data = b"""\
---1234
-Content-Disposition: form-data; filename="ab.txt"
-
-Foo
---1234--""".replace(
-            b"\n", b"\r\n"
-        )
-        args, files = form_data_args()
-        with ExpectLog(gen_log, "multipart/form-data value missing name"):
-            parse_multipart_form_data(b"1234", data, args, files)
-        self.assertEqual(files, {})
-
-    def test_data_after_final_boundary(self):
-        # The spec requires that data after the final boundary be ignored.
-        # http://www.w3.org/Protocols/rfc1341/7_2_Multipart.html
-        # In practice, some libraries include an extra CRLF after the boundary.
-        data = b"""\
---1234
-Content-Disposition: form-data; name="files"; filename="ab.txt"
-
-Foo
---1234--
-""".replace(
-            b"\n", b"\r\n"
-        )
-        args, files = form_data_args()
-        parse_multipart_form_data(b"1234", data, args, files)
-        file = files["files"][0]
-        self.assertEqual(file["filename"], "ab.txt")
-        self.assertEqual(file["body"], b"Foo")
-
-
-class HTTPHeadersTest(unittest.TestCase):
-    def test_multi_line(self):
-        # Lines beginning with whitespace are appended to the previous line
-        # with any leading whitespace replaced by a single space.
-        # Note that while multi-line headers are a part of the HTTP spec,
-        # their use is strongly discouraged.
-        data = """\
-Foo: bar
- baz
-Asdf: qwer
-\tzxcv
-Foo: even
-     more
-     lines
-""".replace(
-            "\n", "\r\n"
-        )
-        headers = HTTPHeaders.parse(data)
-        self.assertEqual(headers["asdf"], "qwer zxcv")
-        self.assertEqual(headers.get_list("asdf"), ["qwer zxcv"])
-        self.assertEqual(headers["Foo"], "bar baz,even more lines")
-        self.assertEqual(headers.get_list("foo"), ["bar baz", "even more lines"])
-        self.assertEqual(
-            sorted(list(headers.get_all())),
-            [("Asdf", "qwer zxcv"), ("Foo", "bar baz"), ("Foo", "even more lines")],
-        )
-
-    def test_malformed_continuation(self):
-        # If the first line starts with whitespace, it's a
-        # continuation line with nothing to continue, so reject it
-        # (with a proper error).
-        data = " Foo: bar"
-        self.assertRaises(HTTPInputError, HTTPHeaders.parse, data)
-
-    def test_unicode_newlines(self):
-        # Ensure that only \r\n is recognized as a header separator, and not
-        # the other newline-like unicode characters.
-        # Characters that are likely to be problematic can be found in
-        # http://unicode.org/standard/reports/tr13/tr13-5.html
-        # and cpython's unicodeobject.c (which defines the implementation
-        # of unicode_type.splitlines(), and uses a different list than TR13).
-        newlines = [
-            u"\u001b",  # VERTICAL TAB
-            u"\u001c",  # FILE SEPARATOR
-            u"\u001d",  # GROUP SEPARATOR
-            u"\u001e",  # RECORD SEPARATOR
-            u"\u0085",  # NEXT LINE
-            u"\u2028",  # LINE SEPARATOR
-            u"\u2029",  # PARAGRAPH SEPARATOR
-        ]
-        for newline in newlines:
-            # Try the utf8 and latin1 representations of each newline
-            for encoding in ["utf8", "latin1"]:
-                try:
-                    try:
-                        encoded = newline.encode(encoding)
-                    except UnicodeEncodeError:
-                        # Some chars cannot be represented in latin1
-                        continue
-                    data = b"Cookie: foo=" + encoded + b"bar"
-                    # parse() wants a native_str, so decode through latin1
-                    # in the same way the real parser does.
-                    headers = HTTPHeaders.parse(native_str(data.decode("latin1")))
-                    expected = [
-                        (
-                            "Cookie",
-                            "foo=" + native_str(encoded.decode("latin1")) + "bar",
-                        )
-                    ]
-                    self.assertEqual(expected, list(headers.get_all()))
-                except Exception:
-                    gen_log.warning("failed while trying %r in %s", newline, encoding)
-                    raise
-
-    def test_optional_cr(self):
-        # Both CRLF and LF should be accepted as separators. CR should not be
-        # part of the data when followed by LF, but it is a normal char
-        # otherwise (or should bare CR be an error?)
-        headers = HTTPHeaders.parse("CRLF: crlf\r\nLF: lf\nCR: cr\rMore: more\r\n")
-        self.assertEqual(
-            sorted(headers.get_all()),
-            [("Cr", "cr\rMore: more"), ("Crlf", "crlf"), ("Lf", "lf")],
-        )
-
-    def test_copy(self):
-        all_pairs = [("A", "1"), ("A", "2"), ("B", "c")]
-        h1 = HTTPHeaders()
-        for k, v in all_pairs:
-            h1.add(k, v)
-        h2 = h1.copy()
-        h3 = copy.copy(h1)
-        h4 = copy.deepcopy(h1)
-        for headers in [h1, h2, h3, h4]:
-            # All the copies are identical, no matter how they were
-            # constructed.
-            self.assertEqual(list(sorted(headers.get_all())), all_pairs)
-        for headers in [h2, h3, h4]:
-            # Neither the dict or its member lists are reused.
-            self.assertIsNot(headers, h1)
-            self.assertIsNot(headers.get_list("A"), h1.get_list("A"))
-
-    def test_pickle_roundtrip(self):
-        headers = HTTPHeaders()
-        headers.add("Set-Cookie", "a=b")
-        headers.add("Set-Cookie", "c=d")
-        headers.add("Content-Type", "text/html")
-        pickled = pickle.dumps(headers)
-        unpickled = pickle.loads(pickled)
-        self.assertEqual(sorted(headers.get_all()), sorted(unpickled.get_all()))
-        self.assertEqual(sorted(headers.items()), sorted(unpickled.items()))
-
-    def test_setdefault(self):
-        headers = HTTPHeaders()
-        headers["foo"] = "bar"
-        # If a value is present, setdefault returns it without changes.
-        self.assertEqual(headers.setdefault("foo", "baz"), "bar")
-        self.assertEqual(headers["foo"], "bar")
-        # If a value is not present, setdefault sets it for future use.
-        self.assertEqual(headers.setdefault("quux", "xyzzy"), "xyzzy")
-        self.assertEqual(headers["quux"], "xyzzy")
-        self.assertEqual(sorted(headers.get_all()), [("Foo", "bar"), ("Quux", "xyzzy")])
-
-    def test_string(self):
-        headers = HTTPHeaders()
-        headers.add("Foo", "1")
-        headers.add("Foo", "2")
-        headers.add("Foo", "3")
-        headers2 = HTTPHeaders.parse(str(headers))
-        self.assertEquals(headers, headers2)
-
-
-class FormatTimestampTest(unittest.TestCase):
-    # Make sure that all the input types are supported.
-    TIMESTAMP = 1359312200.503611
-    EXPECTED = "Sun, 27 Jan 2013 18:43:20 GMT"
-
-    def check(self, value):
-        self.assertEqual(format_timestamp(value), self.EXPECTED)
-
-    def test_unix_time_float(self):
-        self.check(self.TIMESTAMP)
-
-    def test_unix_time_int(self):
-        self.check(int(self.TIMESTAMP))
-
-    def test_struct_time(self):
-        self.check(time.gmtime(self.TIMESTAMP))
-
-    def test_time_tuple(self):
-        tup = tuple(time.gmtime(self.TIMESTAMP))
-        self.assertEqual(9, len(tup))
-        self.check(tup)
-
-    def test_datetime(self):
-        self.check(datetime.datetime.utcfromtimestamp(self.TIMESTAMP))
-
-
-# HTTPServerRequest is mainly tested incidentally to the server itself,
-# but this tests the parts of the class that can be tested in isolation.
-class HTTPServerRequestTest(unittest.TestCase):
-    def test_default_constructor(self):
-        # All parameters are formally optional, but uri is required
-        # (and has been for some time).  This test ensures that no
-        # more required parameters slip in.
-        HTTPServerRequest(uri="/")
-
-    def test_body_is_a_byte_string(self):
-        requets = HTTPServerRequest(uri="/")
-        self.assertIsInstance(requets.body, bytes)
-
-    def test_repr_does_not_contain_headers(self):
-        request = HTTPServerRequest(
-            uri="/", headers=HTTPHeaders({"Canary": ["Coal Mine"]})
-        )
-        self.assertTrue("Canary" not in repr(request))
-
-
-class ParseRequestStartLineTest(unittest.TestCase):
-    METHOD = "GET"
-    PATH = "/foo"
-    VERSION = "HTTP/1.1"
-
-    def test_parse_request_start_line(self):
-        start_line = " ".join([self.METHOD, self.PATH, self.VERSION])
-        parsed_start_line = parse_request_start_line(start_line)
-        self.assertEqual(parsed_start_line.method, self.METHOD)
-        self.assertEqual(parsed_start_line.path, self.PATH)
-        self.assertEqual(parsed_start_line.version, self.VERSION)
-
-
-class ParseCookieTest(unittest.TestCase):
-    # These tests copied from Django:
-    # https://github.com/django/django/pull/6277/commits/da810901ada1cae9fc1f018f879f11a7fb467b28
-    def test_python_cookies(self):
-        """
-        Test cases copied from Python's Lib/test/test_http_cookies.py
-        """
-        self.assertEqual(
-            parse_cookie("chips=ahoy; vienna=finger"),
-            {"chips": "ahoy", "vienna": "finger"},
-        )
-        # Here parse_cookie() differs from Python's cookie parsing in that it
-        # treats all semicolons as delimiters, even within quotes.
-        self.assertEqual(
-            parse_cookie('keebler="E=mc2; L=\\"Loves\\"; fudge=\\012;"'),
-            {"keebler": '"E=mc2', "L": '\\"Loves\\"', "fudge": "\\012", "": '"'},
-        )
-        # Illegal cookies that have an '=' char in an unquoted value.
-        self.assertEqual(parse_cookie("keebler=E=mc2"), {"keebler": "E=mc2"})
-        # Cookies with ':' character in their name.
-        self.assertEqual(
-            parse_cookie("key:term=value:term"), {"key:term": "value:term"}
-        )
-        # Cookies with '[' and ']'.
-        self.assertEqual(
-            parse_cookie("a=b; c=[; d=r; f=h"), {"a": "b", "c": "[", "d": "r", "f": "h"}
-        )
-
-    def test_cookie_edgecases(self):
-        # Cookies that RFC6265 allows.
-        self.assertEqual(
-            parse_cookie("a=b; Domain=example.com"), {"a": "b", "Domain": "example.com"}
-        )
-        # parse_cookie() has historically kept only the last cookie with the
-        # same name.
-        self.assertEqual(parse_cookie("a=b; h=i; a=c"), {"a": "c", "h": "i"})
-
-    def test_invalid_cookies(self):
-        """
-        Cookie strings that go against RFC6265 but browsers will send if set
-        via document.cookie.
-        """
-        # Chunks without an equals sign appear as unnamed values per
-        # https://bugzilla.mozilla.org/show_bug.cgi?id=169091
-        self.assertIn(
-            "django_language",
-            parse_cookie("abc=def; unnamed; django_language=en").keys(),
-        )
-        # Even a double quote may be an unamed value.
-        self.assertEqual(parse_cookie('a=b; "; c=d'), {"a": "b", "": '"', "c": "d"})
-        # Spaces in names and values, and an equals sign in values.
-        self.assertEqual(
-            parse_cookie("a b c=d e = f; gh=i"), {"a b c": "d e = f", "gh": "i"}
-        )
-        # More characters the spec forbids.
-        self.assertEqual(
-            parse_cookie('a   b,c<>@:/[]?{}=d  "  =e,f g'),
-            {"a   b,c<>@:/[]?{}": 'd  "  =e,f g'},
-        )
-        # Unicode characters. The spec only allows ASCII.
-        self.assertEqual(
-            parse_cookie("saint=André Bessette"),
-            {"saint": native_str("André Bessette")},
-        )
-        # Browsers don't send extra whitespace or semicolons in Cookie headers,
-        # but parse_cookie() should parse whitespace the same way
-        # document.cookie parses whitespace.
-        self.assertEqual(
-            parse_cookie("  =  b  ;  ;  =  ;   c  =  ;  "), {"": "b", "c": ""}
-        )
diff --git a/venv/lib/python3.7/site-packages/tornado/test/import_test.py b/venv/lib/python3.7/site-packages/tornado/test/import_test.py
deleted file mode 100644
index 23450fb..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/import_test.py
+++ /dev/null
@@ -1,66 +0,0 @@
-# flake8: noqa
-import subprocess
-import sys
-import unittest
-
-_import_everything = b"""
-# The event loop is not fork-safe, and it's easy to initialize an asyncio.Future
-# at startup, which in turn creates the default event loop and prevents forking.
-# Explicitly disallow the default event loop so that an error will be raised
-# if something tries to touch it.
-import asyncio
-asyncio.set_event_loop(None)
-
-import tornado.auth
-import tornado.autoreload
-import tornado.concurrent
-import tornado.escape
-import tornado.gen
-import tornado.http1connection
-import tornado.httpclient
-import tornado.httpserver
-import tornado.httputil
-import tornado.ioloop
-import tornado.iostream
-import tornado.locale
-import tornado.log
-import tornado.netutil
-import tornado.options
-import tornado.process
-import tornado.simple_httpclient
-import tornado.tcpserver
-import tornado.tcpclient
-import tornado.template
-import tornado.testing
-import tornado.util
-import tornado.web
-import tornado.websocket
-import tornado.wsgi
-
-try:
-    import pycurl
-except ImportError:
-    pass
-else:
-    import tornado.curl_httpclient
-"""
-
-
-class ImportTest(unittest.TestCase):
-    def test_import_everything(self):
-        # Test that all Tornado modules can be imported without side effects,
-        # specifically without initializing the default asyncio event loop.
-        # Since we can't tell which modules may have already beein imported
-        # in our process, do it in a subprocess for a clean slate.
-        proc = subprocess.Popen([sys.executable], stdin=subprocess.PIPE)
-        proc.communicate(_import_everything)
-        self.assertEqual(proc.returncode, 0)
-
-    def test_import_aliases(self):
-        # Ensure we don't delete formerly-documented aliases accidentally.
-        import tornado.ioloop
-        import tornado.gen
-        import tornado.util
-
-        self.assertIs(tornado.ioloop.TimeoutError, tornado.util.TimeoutError)
-        self.assertIs(tornado.gen.TimeoutError, tornado.util.TimeoutError)
diff --git a/venv/lib/python3.7/site-packages/tornado/test/ioloop_test.py b/venv/lib/python3.7/site-packages/tornado/test/ioloop_test.py
deleted file mode 100644
index 293ea35..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/ioloop_test.py
+++ /dev/null
@@ -1,719 +0,0 @@
-from concurrent.futures import ThreadPoolExecutor
-from concurrent import futures
-import contextlib
-import datetime
-import functools
-import socket
-import subprocess
-import sys
-import threading
-import time
-import types
-from unittest import mock
-import unittest
-
-from tornado.escape import native_str
-from tornado import gen
-from tornado.ioloop import IOLoop, TimeoutError, PeriodicCallback
-from tornado.log import app_log
-from tornado.testing import AsyncTestCase, bind_unused_port, ExpectLog, gen_test
-from tornado.test.util import skipIfNonUnix, skipOnTravis
-
-import typing
-
-if typing.TYPE_CHECKING:
-    from typing import List  # noqa: F401
-
-
-class TestIOLoop(AsyncTestCase):
-    def test_add_callback_return_sequence(self):
-        # A callback returning {} or [] shouldn't spin the CPU, see Issue #1803.
-        self.calls = 0
-
-        loop = self.io_loop
-        test = self
-        old_add_callback = loop.add_callback
-
-        def add_callback(self, callback, *args, **kwargs):
-            test.calls += 1
-            old_add_callback(callback, *args, **kwargs)
-
-        loop.add_callback = types.MethodType(add_callback, loop)
-        loop.add_callback(lambda: {})
-        loop.add_callback(lambda: [])
-        loop.add_timeout(datetime.timedelta(milliseconds=50), loop.stop)
-        loop.start()
-        self.assertLess(self.calls, 10)
-
-    @skipOnTravis
-    def test_add_callback_wakeup(self):
-        # Make sure that add_callback from inside a running IOLoop
-        # wakes up the IOLoop immediately instead of waiting for a timeout.
-        def callback():
-            self.called = True
-            self.stop()
-
-        def schedule_callback():
-            self.called = False
-            self.io_loop.add_callback(callback)
-            # Store away the time so we can check if we woke up immediately
-            self.start_time = time.time()
-
-        self.io_loop.add_timeout(self.io_loop.time(), schedule_callback)
-        self.wait()
-        self.assertAlmostEqual(time.time(), self.start_time, places=2)
-        self.assertTrue(self.called)
-
-    @skipOnTravis
-    def test_add_callback_wakeup_other_thread(self):
-        def target():
-            # sleep a bit to let the ioloop go into its poll loop
-            time.sleep(0.01)
-            self.stop_time = time.time()
-            self.io_loop.add_callback(self.stop)
-
-        thread = threading.Thread(target=target)
-        self.io_loop.add_callback(thread.start)
-        self.wait()
-        delta = time.time() - self.stop_time
-        self.assertLess(delta, 0.1)
-        thread.join()
-
-    def test_add_timeout_timedelta(self):
-        self.io_loop.add_timeout(datetime.timedelta(microseconds=1), self.stop)
-        self.wait()
-
-    def test_multiple_add(self):
-        sock, port = bind_unused_port()
-        try:
-            self.io_loop.add_handler(
-                sock.fileno(), lambda fd, events: None, IOLoop.READ
-            )
-            # Attempting to add the same handler twice fails
-            # (with a platform-dependent exception)
-            self.assertRaises(
-                Exception,
-                self.io_loop.add_handler,
-                sock.fileno(),
-                lambda fd, events: None,
-                IOLoop.READ,
-            )
-        finally:
-            self.io_loop.remove_handler(sock.fileno())
-            sock.close()
-
-    def test_remove_without_add(self):
-        # remove_handler should not throw an exception if called on an fd
-        # was never added.
-        sock, port = bind_unused_port()
-        try:
-            self.io_loop.remove_handler(sock.fileno())
-        finally:
-            sock.close()
-
-    def test_add_callback_from_signal(self):
-        # cheat a little bit and just run this normally, since we can't
-        # easily simulate the races that happen with real signal handlers
-        self.io_loop.add_callback_from_signal(self.stop)
-        self.wait()
-
-    def test_add_callback_from_signal_other_thread(self):
-        # Very crude test, just to make sure that we cover this case.
-        # This also happens to be the first test where we run an IOLoop in
-        # a non-main thread.
-        other_ioloop = IOLoop()
-        thread = threading.Thread(target=other_ioloop.start)
-        thread.start()
-        other_ioloop.add_callback_from_signal(other_ioloop.stop)
-        thread.join()
-        other_ioloop.close()
-
-    def test_add_callback_while_closing(self):
-        # add_callback should not fail if it races with another thread
-        # closing the IOLoop. The callbacks are dropped silently
-        # without executing.
-        closing = threading.Event()
-
-        def target():
-            other_ioloop.add_callback(other_ioloop.stop)
-            other_ioloop.start()
-            closing.set()
-            other_ioloop.close(all_fds=True)
-
-        other_ioloop = IOLoop()
-        thread = threading.Thread(target=target)
-        thread.start()
-        closing.wait()
-        for i in range(1000):
-            other_ioloop.add_callback(lambda: None)
-
-    @skipIfNonUnix  # just because socketpair is so convenient
-    def test_read_while_writeable(self):
-        # Ensure that write events don't come in while we're waiting for
-        # a read and haven't asked for writeability. (the reverse is
-        # difficult to test for)
-        client, server = socket.socketpair()
-        try:
-
-            def handler(fd, events):
-                self.assertEqual(events, IOLoop.READ)
-                self.stop()
-
-            self.io_loop.add_handler(client.fileno(), handler, IOLoop.READ)
-            self.io_loop.add_timeout(
-                self.io_loop.time() + 0.01, functools.partial(server.send, b"asdf")
-            )
-            self.wait()
-            self.io_loop.remove_handler(client.fileno())
-        finally:
-            client.close()
-            server.close()
-
-    def test_remove_timeout_after_fire(self):
-        # It is not an error to call remove_timeout after it has run.
-        handle = self.io_loop.add_timeout(self.io_loop.time(), self.stop)
-        self.wait()
-        self.io_loop.remove_timeout(handle)
-
-    def test_remove_timeout_cleanup(self):
-        # Add and remove enough callbacks to trigger cleanup.
-        # Not a very thorough test, but it ensures that the cleanup code
-        # gets executed and doesn't blow up.  This test is only really useful
-        # on PollIOLoop subclasses, but it should run silently on any
-        # implementation.
-        for i in range(2000):
-            timeout = self.io_loop.add_timeout(self.io_loop.time() + 3600, lambda: None)
-            self.io_loop.remove_timeout(timeout)
-        # HACK: wait two IOLoop iterations for the GC to happen.
-        self.io_loop.add_callback(lambda: self.io_loop.add_callback(self.stop))
-        self.wait()
-
-    def test_remove_timeout_from_timeout(self):
-        calls = [False, False]
-
-        # Schedule several callbacks and wait for them all to come due at once.
-        # t2 should be cancelled by t1, even though it is already scheduled to
-        # be run before the ioloop even looks at it.
-        now = self.io_loop.time()
-
-        def t1():
-            calls[0] = True
-            self.io_loop.remove_timeout(t2_handle)
-
-        self.io_loop.add_timeout(now + 0.01, t1)
-
-        def t2():
-            calls[1] = True
-
-        t2_handle = self.io_loop.add_timeout(now + 0.02, t2)
-        self.io_loop.add_timeout(now + 0.03, self.stop)
-        time.sleep(0.03)
-        self.wait()
-        self.assertEqual(calls, [True, False])
-
-    def test_timeout_with_arguments(self):
-        # This tests that all the timeout methods pass through *args correctly.
-        results = []  # type: List[int]
-        self.io_loop.add_timeout(self.io_loop.time(), results.append, 1)
-        self.io_loop.add_timeout(datetime.timedelta(seconds=0), results.append, 2)
-        self.io_loop.call_at(self.io_loop.time(), results.append, 3)
-        self.io_loop.call_later(0, results.append, 4)
-        self.io_loop.call_later(0, self.stop)
-        self.wait()
-        # The asyncio event loop does not guarantee the order of these
-        # callbacks.
-        self.assertEqual(sorted(results), [1, 2, 3, 4])
-
-    def test_add_timeout_return(self):
-        # All the timeout methods return non-None handles that can be
-        # passed to remove_timeout.
-        handle = self.io_loop.add_timeout(self.io_loop.time(), lambda: None)
-        self.assertFalse(handle is None)
-        self.io_loop.remove_timeout(handle)
-
-    def test_call_at_return(self):
-        handle = self.io_loop.call_at(self.io_loop.time(), lambda: None)
-        self.assertFalse(handle is None)
-        self.io_loop.remove_timeout(handle)
-
-    def test_call_later_return(self):
-        handle = self.io_loop.call_later(0, lambda: None)
-        self.assertFalse(handle is None)
-        self.io_loop.remove_timeout(handle)
-
-    def test_close_file_object(self):
-        """When a file object is used instead of a numeric file descriptor,
-        the object should be closed (by IOLoop.close(all_fds=True),
-        not just the fd.
-        """
-        # Use a socket since they are supported by IOLoop on all platforms.
-        # Unfortunately, sockets don't support the .closed attribute for
-        # inspecting their close status, so we must use a wrapper.
-        class SocketWrapper(object):
-            def __init__(self, sockobj):
-                self.sockobj = sockobj
-                self.closed = False
-
-            def fileno(self):
-                return self.sockobj.fileno()
-
-            def close(self):
-                self.closed = True
-                self.sockobj.close()
-
-        sockobj, port = bind_unused_port()
-        socket_wrapper = SocketWrapper(sockobj)
-        io_loop = IOLoop()
-        io_loop.add_handler(socket_wrapper, lambda fd, events: None, IOLoop.READ)
-        io_loop.close(all_fds=True)
-        self.assertTrue(socket_wrapper.closed)
-
-    def test_handler_callback_file_object(self):
-        """The handler callback receives the same fd object it passed in."""
-        server_sock, port = bind_unused_port()
-        fds = []
-
-        def handle_connection(fd, events):
-            fds.append(fd)
-            conn, addr = server_sock.accept()
-            conn.close()
-            self.stop()
-
-        self.io_loop.add_handler(server_sock, handle_connection, IOLoop.READ)
-        with contextlib.closing(socket.socket()) as client_sock:
-            client_sock.connect(("127.0.0.1", port))
-            self.wait()
-        self.io_loop.remove_handler(server_sock)
-        self.io_loop.add_handler(server_sock.fileno(), handle_connection, IOLoop.READ)
-        with contextlib.closing(socket.socket()) as client_sock:
-            client_sock.connect(("127.0.0.1", port))
-            self.wait()
-        self.assertIs(fds[0], server_sock)
-        self.assertEqual(fds[1], server_sock.fileno())
-        self.io_loop.remove_handler(server_sock.fileno())
-        server_sock.close()
-
-    def test_mixed_fd_fileobj(self):
-        server_sock, port = bind_unused_port()
-
-        def f(fd, events):
-            pass
-
-        self.io_loop.add_handler(server_sock, f, IOLoop.READ)
-        with self.assertRaises(Exception):
-            # The exact error is unspecified - some implementations use
-            # IOError, others use ValueError.
-            self.io_loop.add_handler(server_sock.fileno(), f, IOLoop.READ)
-        self.io_loop.remove_handler(server_sock.fileno())
-        server_sock.close()
-
-    def test_reentrant(self):
-        """Calling start() twice should raise an error, not deadlock."""
-        returned_from_start = [False]
-        got_exception = [False]
-
-        def callback():
-            try:
-                self.io_loop.start()
-                returned_from_start[0] = True
-            except Exception:
-                got_exception[0] = True
-            self.stop()
-
-        self.io_loop.add_callback(callback)
-        self.wait()
-        self.assertTrue(got_exception[0])
-        self.assertFalse(returned_from_start[0])
-
-    def test_exception_logging(self):
-        """Uncaught exceptions get logged by the IOLoop."""
-        self.io_loop.add_callback(lambda: 1 / 0)
-        self.io_loop.add_callback(self.stop)
-        with ExpectLog(app_log, "Exception in callback"):
-            self.wait()
-
-    def test_exception_logging_future(self):
-        """The IOLoop examines exceptions from Futures and logs them."""
-
-        @gen.coroutine
-        def callback():
-            self.io_loop.add_callback(self.stop)
-            1 / 0
-
-        self.io_loop.add_callback(callback)
-        with ExpectLog(app_log, "Exception in callback"):
-            self.wait()
-
-    def test_exception_logging_native_coro(self):
-        """The IOLoop examines exceptions from awaitables and logs them."""
-
-        async def callback():
-            # Stop the IOLoop two iterations after raising an exception
-            # to give the exception time to be logged.
-            self.io_loop.add_callback(self.io_loop.add_callback, self.stop)
-            1 / 0
-
-        self.io_loop.add_callback(callback)
-        with ExpectLog(app_log, "Exception in callback"):
-            self.wait()
-
-    def test_spawn_callback(self):
-        # Both add_callback and spawn_callback run directly on the IOLoop,
-        # so their errors are logged without stopping the test.
-        self.io_loop.add_callback(lambda: 1 / 0)
-        self.io_loop.add_callback(self.stop)
-        with ExpectLog(app_log, "Exception in callback"):
-            self.wait()
-        # A spawned callback is run directly on the IOLoop, so it will be
-        # logged without stopping the test.
-        self.io_loop.spawn_callback(lambda: 1 / 0)
-        self.io_loop.add_callback(self.stop)
-        with ExpectLog(app_log, "Exception in callback"):
-            self.wait()
-
-    @skipIfNonUnix
-    def test_remove_handler_from_handler(self):
-        # Create two sockets with simultaneous read events.
-        client, server = socket.socketpair()
-        try:
-            client.send(b"abc")
-            server.send(b"abc")
-
-            # After reading from one fd, remove the other from the IOLoop.
-            chunks = []
-
-            def handle_read(fd, events):
-                chunks.append(fd.recv(1024))
-                if fd is client:
-                    self.io_loop.remove_handler(server)
-                else:
-                    self.io_loop.remove_handler(client)
-
-            self.io_loop.add_handler(client, handle_read, self.io_loop.READ)
-            self.io_loop.add_handler(server, handle_read, self.io_loop.READ)
-            self.io_loop.call_later(0.1, self.stop)
-            self.wait()
-
-            # Only one fd was read; the other was cleanly removed.
-            self.assertEqual(chunks, [b"abc"])
-        finally:
-            client.close()
-            server.close()
-
-    @gen_test
-    def test_init_close_race(self):
-        # Regression test for #2367
-        def f():
-            for i in range(10):
-                loop = IOLoop()
-                loop.close()
-
-        yield gen.multi([self.io_loop.run_in_executor(None, f) for i in range(2)])
-
-
-# Deliberately not a subclass of AsyncTestCase so the IOLoop isn't
-# automatically set as current.
-class TestIOLoopCurrent(unittest.TestCase):
-    def setUp(self):
-        self.io_loop = None
-        IOLoop.clear_current()
-
-    def tearDown(self):
-        if self.io_loop is not None:
-            self.io_loop.close()
-
-    def test_default_current(self):
-        self.io_loop = IOLoop()
-        # The first IOLoop with default arguments is made current.
-        self.assertIs(self.io_loop, IOLoop.current())
-        # A second IOLoop can be created but is not made current.
-        io_loop2 = IOLoop()
-        self.assertIs(self.io_loop, IOLoop.current())
-        io_loop2.close()
-
-    def test_non_current(self):
-        self.io_loop = IOLoop(make_current=False)
-        # The new IOLoop is not initially made current.
-        self.assertIsNone(IOLoop.current(instance=False))
-        # Starting the IOLoop makes it current, and stopping the loop
-        # makes it non-current. This process is repeatable.
-        for i in range(3):
-
-            def f():
-                self.current_io_loop = IOLoop.current()
-                self.io_loop.stop()
-
-            self.io_loop.add_callback(f)
-            self.io_loop.start()
-            self.assertIs(self.current_io_loop, self.io_loop)
-            # Now that the loop is stopped, it is no longer current.
-            self.assertIsNone(IOLoop.current(instance=False))
-
-    def test_force_current(self):
-        self.io_loop = IOLoop(make_current=True)
-        self.assertIs(self.io_loop, IOLoop.current())
-        with self.assertRaises(RuntimeError):
-            # A second make_current=True construction cannot succeed.
-            IOLoop(make_current=True)
-        # current() was not affected by the failed construction.
-        self.assertIs(self.io_loop, IOLoop.current())
-
-
-class TestIOLoopCurrentAsync(AsyncTestCase):
-    @gen_test
-    def test_clear_without_current(self):
-        # If there is no current IOLoop, clear_current is a no-op (but
-        # should not fail). Use a thread so we see the threading.Local
-        # in a pristine state.
-        with ThreadPoolExecutor(1) as e:
-            yield e.submit(IOLoop.clear_current)
-
-
-class TestIOLoopFutures(AsyncTestCase):
-    def test_add_future_threads(self):
-        with futures.ThreadPoolExecutor(1) as pool:
-
-            def dummy():
-                pass
-
-            self.io_loop.add_future(
-                pool.submit(dummy), lambda future: self.stop(future)
-            )
-            future = self.wait()
-            self.assertTrue(future.done())
-            self.assertTrue(future.result() is None)
-
-    @gen_test
-    def test_run_in_executor_gen(self):
-        event1 = threading.Event()
-        event2 = threading.Event()
-
-        def sync_func(self_event, other_event):
-            self_event.set()
-            other_event.wait()
-            # Note that return value doesn't actually do anything,
-            # it is just passed through to our final assertion to
-            # make sure it is passed through properly.
-            return self_event
-
-        # Run two synchronous functions, which would deadlock if not
-        # run in parallel.
-        res = yield [
-            IOLoop.current().run_in_executor(None, sync_func, event1, event2),
-            IOLoop.current().run_in_executor(None, sync_func, event2, event1),
-        ]
-
-        self.assertEqual([event1, event2], res)
-
-    @gen_test
-    def test_run_in_executor_native(self):
-        event1 = threading.Event()
-        event2 = threading.Event()
-
-        def sync_func(self_event, other_event):
-            self_event.set()
-            other_event.wait()
-            return self_event
-
-        # Go through an async wrapper to ensure that the result of
-        # run_in_executor works with await and not just gen.coroutine
-        # (simply passing the underlying concurrrent future would do that).
-        async def async_wrapper(self_event, other_event):
-            return await IOLoop.current().run_in_executor(
-                None, sync_func, self_event, other_event
-            )
-
-        res = yield [async_wrapper(event1, event2), async_wrapper(event2, event1)]
-
-        self.assertEqual([event1, event2], res)
-
-    @gen_test
-    def test_set_default_executor(self):
-        count = [0]
-
-        class MyExecutor(futures.ThreadPoolExecutor):
-            def submit(self, func, *args):
-                count[0] += 1
-                return super(MyExecutor, self).submit(func, *args)
-
-        event = threading.Event()
-
-        def sync_func():
-            event.set()
-
-        executor = MyExecutor(1)
-        loop = IOLoop.current()
-        loop.set_default_executor(executor)
-        yield loop.run_in_executor(None, sync_func)
-        self.assertEqual(1, count[0])
-        self.assertTrue(event.is_set())
-
-
-class TestIOLoopRunSync(unittest.TestCase):
-    def setUp(self):
-        self.io_loop = IOLoop()
-
-    def tearDown(self):
-        self.io_loop.close()
-
-    def test_sync_result(self):
-        with self.assertRaises(gen.BadYieldError):
-            self.io_loop.run_sync(lambda: 42)
-
-    def test_sync_exception(self):
-        with self.assertRaises(ZeroDivisionError):
-            self.io_loop.run_sync(lambda: 1 / 0)
-
-    def test_async_result(self):
-        @gen.coroutine
-        def f():
-            yield gen.moment
-            raise gen.Return(42)
-
-        self.assertEqual(self.io_loop.run_sync(f), 42)
-
-    def test_async_exception(self):
-        @gen.coroutine
-        def f():
-            yield gen.moment
-            1 / 0
-
-        with self.assertRaises(ZeroDivisionError):
-            self.io_loop.run_sync(f)
-
-    def test_current(self):
-        def f():
-            self.assertIs(IOLoop.current(), self.io_loop)
-
-        self.io_loop.run_sync(f)
-
-    def test_timeout(self):
-        @gen.coroutine
-        def f():
-            yield gen.sleep(1)
-
-        self.assertRaises(TimeoutError, self.io_loop.run_sync, f, timeout=0.01)
-
-    def test_native_coroutine(self):
-        @gen.coroutine
-        def f1():
-            yield gen.moment
-
-        async def f2():
-            await f1()
-
-        self.io_loop.run_sync(f2)
-
-
-class TestPeriodicCallbackMath(unittest.TestCase):
-    def simulate_calls(self, pc, durations):
-        """Simulate a series of calls to the PeriodicCallback.
-
-        Pass a list of call durations in seconds (negative values
-        work to simulate clock adjustments during the call, or more or
-        less equivalently, between calls). This method returns the
-        times at which each call would be made.
-        """
-        calls = []
-        now = 1000
-        pc._next_timeout = now
-        for d in durations:
-            pc._update_next(now)
-            calls.append(pc._next_timeout)
-            now = pc._next_timeout + d
-        return calls
-
-    def dummy(self):
-        pass
-
-    def test_basic(self):
-        pc = PeriodicCallback(self.dummy, 10000)
-        self.assertEqual(
-            self.simulate_calls(pc, [0] * 5), [1010, 1020, 1030, 1040, 1050]
-        )
-
-    def test_overrun(self):
-        # If a call runs for too long, we skip entire cycles to get
-        # back on schedule.
-        call_durations = [9, 9, 10, 11, 20, 20, 35, 35, 0, 0, 0]
-        expected = [
-            1010,
-            1020,
-            1030,  # first 3 calls on schedule
-            1050,
-            1070,  # next 2 delayed one cycle
-            1100,
-            1130,  # next 2 delayed 2 cycles
-            1170,
-            1210,  # next 2 delayed 3 cycles
-            1220,
-            1230,  # then back on schedule.
-        ]
-
-        pc = PeriodicCallback(self.dummy, 10000)
-        self.assertEqual(self.simulate_calls(pc, call_durations), expected)
-
-    def test_clock_backwards(self):
-        pc = PeriodicCallback(self.dummy, 10000)
-        # Backwards jumps are ignored, potentially resulting in a
-        # slightly slow schedule (although we assume that when
-        # time.time() and time.monotonic() are different, time.time()
-        # is getting adjusted by NTP and is therefore more accurate)
-        self.assertEqual(
-            self.simulate_calls(pc, [-2, -1, -3, -2, 0]), [1010, 1020, 1030, 1040, 1050]
-        )
-
-        # For big jumps, we should perhaps alter the schedule, but we
-        # don't currently. This trace shows that we run callbacks
-        # every 10s of time.time(), but the first and second calls are
-        # 110s of real time apart because the backwards jump is
-        # ignored.
-        self.assertEqual(self.simulate_calls(pc, [-100, 0, 0]), [1010, 1020, 1030])
-
-    def test_jitter(self):
-        random_times = [0.5, 1, 0, 0.75]
-        expected = [1010, 1022.5, 1030, 1041.25]
-        call_durations = [0] * len(random_times)
-        pc = PeriodicCallback(self.dummy, 10000, jitter=0.5)
-
-        def mock_random():
-            return random_times.pop(0)
-
-        with mock.patch("random.random", mock_random):
-            self.assertEqual(self.simulate_calls(pc, call_durations), expected)
-
-
-class TestIOLoopConfiguration(unittest.TestCase):
-    def run_python(self, *statements):
-        stmt_list = [
-            "from tornado.ioloop import IOLoop",
-            "classname = lambda x: x.__class__.__name__",
-        ] + list(statements)
-        args = [sys.executable, "-c", "; ".join(stmt_list)]
-        return native_str(subprocess.check_output(args)).strip()
-
-    def test_default(self):
-        # When asyncio is available, it is used by default.
-        cls = self.run_python("print(classname(IOLoop.current()))")
-        self.assertEqual(cls, "AsyncIOMainLoop")
-        cls = self.run_python("print(classname(IOLoop()))")
-        self.assertEqual(cls, "AsyncIOLoop")
-
-    def test_asyncio(self):
-        cls = self.run_python(
-            'IOLoop.configure("tornado.platform.asyncio.AsyncIOLoop")',
-            "print(classname(IOLoop.current()))",
-        )
-        self.assertEqual(cls, "AsyncIOMainLoop")
-
-    def test_asyncio_main(self):
-        cls = self.run_python(
-            "from tornado.platform.asyncio import AsyncIOMainLoop",
-            "AsyncIOMainLoop().install()",
-            "print(classname(IOLoop.current()))",
-        )
-        self.assertEqual(cls, "AsyncIOMainLoop")
-
-
-if __name__ == "__main__":
-    unittest.main()
diff --git a/venv/lib/python3.7/site-packages/tornado/test/iostream_test.py b/venv/lib/python3.7/site-packages/tornado/test/iostream_test.py
deleted file mode 100644
index 295cdd5..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/iostream_test.py
+++ /dev/null
@@ -1,1198 +0,0 @@
-from tornado.concurrent import Future
-from tornado import gen
-from tornado import netutil
-from tornado.iostream import (
-    IOStream,
-    SSLIOStream,
-    PipeIOStream,
-    StreamClosedError,
-    _StreamBuffer,
-)
-from tornado.httputil import HTTPHeaders
-from tornado.locks import Condition, Event
-from tornado.log import gen_log
-from tornado.netutil import ssl_wrap_socket
-from tornado.tcpserver import TCPServer
-from tornado.testing import (
-    AsyncHTTPTestCase,
-    AsyncHTTPSTestCase,
-    AsyncTestCase,
-    bind_unused_port,
-    ExpectLog,
-    gen_test,
-)
-from tornado.test.util import skipIfNonUnix, refusing_port, skipPypy3V58
-from tornado.web import RequestHandler, Application
-import errno
-import hashlib
-import os
-import platform
-import random
-import socket
-import ssl
-import sys
-from unittest import mock
-import unittest
-
-
-def _server_ssl_options():
-    return dict(
-        certfile=os.path.join(os.path.dirname(__file__), "test.crt"),
-        keyfile=os.path.join(os.path.dirname(__file__), "test.key"),
-    )
-
-
-class HelloHandler(RequestHandler):
-    def get(self):
-        self.write("Hello")
-
-
-class TestIOStreamWebMixin(object):
-    def _make_client_iostream(self):
-        raise NotImplementedError()
-
-    def get_app(self):
-        return Application([("/", HelloHandler)])
-
-    def test_connection_closed(self):
-        # When a server sends a response and then closes the connection,
-        # the client must be allowed to read the data before the IOStream
-        # closes itself.  Epoll reports closed connections with a separate
-        # EPOLLRDHUP event delivered at the same time as the read event,
-        # while kqueue reports them as a second read/write event with an EOF
-        # flag.
-        response = self.fetch("/", headers={"Connection": "close"})
-        response.rethrow()
-
-    @gen_test
-    def test_read_until_close(self):
-        stream = self._make_client_iostream()
-        yield stream.connect(("127.0.0.1", self.get_http_port()))
-        stream.write(b"GET / HTTP/1.0\r\n\r\n")
-
-        data = yield stream.read_until_close()
-        self.assertTrue(data.startswith(b"HTTP/1.1 200"))
-        self.assertTrue(data.endswith(b"Hello"))
-
-    @gen_test
-    def test_read_zero_bytes(self):
-        self.stream = self._make_client_iostream()
-        yield self.stream.connect(("127.0.0.1", self.get_http_port()))
-        self.stream.write(b"GET / HTTP/1.0\r\n\r\n")
-
-        # normal read
-        data = yield self.stream.read_bytes(9)
-        self.assertEqual(data, b"HTTP/1.1 ")
-
-        # zero bytes
-        data = yield self.stream.read_bytes(0)
-        self.assertEqual(data, b"")
-
-        # another normal read
-        data = yield self.stream.read_bytes(3)
-        self.assertEqual(data, b"200")
-
-        self.stream.close()
-
-    @gen_test
-    def test_write_while_connecting(self):
-        stream = self._make_client_iostream()
-        connect_fut = stream.connect(("127.0.0.1", self.get_http_port()))
-        # unlike the previous tests, try to write before the connection
-        # is complete.
-        write_fut = stream.write(b"GET / HTTP/1.0\r\nConnection: close\r\n\r\n")
-        self.assertFalse(connect_fut.done())
-
-        # connect will always complete before write.
-        it = gen.WaitIterator(connect_fut, write_fut)
-        resolved_order = []
-        while not it.done():
-            yield it.next()
-            resolved_order.append(it.current_future)
-        self.assertEqual(resolved_order, [connect_fut, write_fut])
-
-        data = yield stream.read_until_close()
-        self.assertTrue(data.endswith(b"Hello"))
-
-        stream.close()
-
-    @gen_test
-    def test_future_interface(self):
-        """Basic test of IOStream's ability to return Futures."""
-        stream = self._make_client_iostream()
-        connect_result = yield stream.connect(("127.0.0.1", self.get_http_port()))
-        self.assertIs(connect_result, stream)
-        yield stream.write(b"GET / HTTP/1.0\r\n\r\n")
-        first_line = yield stream.read_until(b"\r\n")
-        self.assertEqual(first_line, b"HTTP/1.1 200 OK\r\n")
-        # callback=None is equivalent to no callback.
-        header_data = yield stream.read_until(b"\r\n\r\n")
-        headers = HTTPHeaders.parse(header_data.decode("latin1"))
-        content_length = int(headers["Content-Length"])
-        body = yield stream.read_bytes(content_length)
-        self.assertEqual(body, b"Hello")
-        stream.close()
-
-    @gen_test
-    def test_future_close_while_reading(self):
-        stream = self._make_client_iostream()
-        yield stream.connect(("127.0.0.1", self.get_http_port()))
-        yield stream.write(b"GET / HTTP/1.0\r\n\r\n")
-        with self.assertRaises(StreamClosedError):
-            yield stream.read_bytes(1024 * 1024)
-        stream.close()
-
-    @gen_test
-    def test_future_read_until_close(self):
-        # Ensure that the data comes through before the StreamClosedError.
-        stream = self._make_client_iostream()
-        yield stream.connect(("127.0.0.1", self.get_http_port()))
-        yield stream.write(b"GET / HTTP/1.0\r\nConnection: close\r\n\r\n")
-        yield stream.read_until(b"\r\n\r\n")
-        body = yield stream.read_until_close()
-        self.assertEqual(body, b"Hello")
-
-        # Nothing else to read; the error comes immediately without waiting
-        # for yield.
-        with self.assertRaises(StreamClosedError):
-            stream.read_bytes(1)
-
-
-class TestReadWriteMixin(object):
-    # Tests where one stream reads and the other writes.
-    # These should work for BaseIOStream implementations.
-
-    def make_iostream_pair(self, **kwargs):
-        raise NotImplementedError
-
-    @gen_test
-    def test_write_zero_bytes(self):
-        # Attempting to write zero bytes should run the callback without
-        # going into an infinite loop.
-        rs, ws = yield self.make_iostream_pair()
-        yield ws.write(b"")
-        ws.close()
-        rs.close()
-
-    @gen_test
-    def test_future_delayed_close_callback(self):
-        # Same as test_delayed_close_callback, but with the future interface.
-        rs, ws = yield self.make_iostream_pair()
-
-        try:
-            ws.write(b"12")
-            chunks = []
-            chunks.append((yield rs.read_bytes(1)))
-            ws.close()
-            chunks.append((yield rs.read_bytes(1)))
-            self.assertEqual(chunks, [b"1", b"2"])
-        finally:
-            ws.close()
-            rs.close()
-
-    @gen_test
-    def test_close_buffered_data(self):
-        # Similar to the previous test, but with data stored in the OS's
-        # socket buffers instead of the IOStream's read buffer.  Out-of-band
-        # close notifications must be delayed until all data has been
-        # drained into the IOStream buffer. (epoll used to use out-of-band
-        # close events with EPOLLRDHUP, but no longer)
-        #
-        # This depends on the read_chunk_size being smaller than the
-        # OS socket buffer, so make it small.
-        rs, ws = yield self.make_iostream_pair(read_chunk_size=256)
-        try:
-            ws.write(b"A" * 512)
-            data = yield rs.read_bytes(256)
-            self.assertEqual(b"A" * 256, data)
-            ws.close()
-            # Allow the close to propagate to the `rs` side of the
-            # connection.  Using add_callback instead of add_timeout
-            # doesn't seem to work, even with multiple iterations
-            yield gen.sleep(0.01)
-            data = yield rs.read_bytes(256)
-            self.assertEqual(b"A" * 256, data)
-        finally:
-            ws.close()
-            rs.close()
-
-    @gen_test
-    def test_read_until_close_after_close(self):
-        # Similar to test_delayed_close_callback, but read_until_close takes
-        # a separate code path so test it separately.
-        rs, ws = yield self.make_iostream_pair()
-        try:
-            ws.write(b"1234")
-            ws.close()
-            # Read one byte to make sure the client has received the data.
-            # It won't run the close callback as long as there is more buffered
-            # data that could satisfy a later read.
-            data = yield rs.read_bytes(1)
-            self.assertEqual(data, b"1")
-            data = yield rs.read_until_close()
-            self.assertEqual(data, b"234")
-        finally:
-            ws.close()
-            rs.close()
-
-    @gen_test
-    def test_large_read_until(self):
-        # Performance test: read_until used to have a quadratic component
-        # so a read_until of 4MB would take 8 seconds; now it takes 0.25
-        # seconds.
-        rs, ws = yield self.make_iostream_pair()
-        try:
-            # This test fails on pypy with ssl.  I think it's because
-            # pypy's gc defeats moves objects, breaking the
-            # "frozen write buffer" assumption.
-            if (
-                isinstance(rs, SSLIOStream)
-                and platform.python_implementation() == "PyPy"
-            ):
-                raise unittest.SkipTest("pypy gc causes problems with openssl")
-            NUM_KB = 4096
-            for i in range(NUM_KB):
-                ws.write(b"A" * 1024)
-            ws.write(b"\r\n")
-            data = yield rs.read_until(b"\r\n")
-            self.assertEqual(len(data), NUM_KB * 1024 + 2)
-        finally:
-            ws.close()
-            rs.close()
-
-    @gen_test
-    def test_close_callback_with_pending_read(self):
-        # Regression test for a bug that was introduced in 2.3
-        # where the IOStream._close_callback would never be called
-        # if there were pending reads.
-        OK = b"OK\r\n"
-        rs, ws = yield self.make_iostream_pair()
-        event = Event()
-        rs.set_close_callback(event.set)
-        try:
-            ws.write(OK)
-            res = yield rs.read_until(b"\r\n")
-            self.assertEqual(res, OK)
-
-            ws.close()
-            rs.read_until(b"\r\n")
-            # If _close_callback (self.stop) is not called,
-            # an AssertionError: Async operation timed out after 5 seconds
-            # will be raised.
-            yield event.wait()
-        finally:
-            ws.close()
-            rs.close()
-
-    @gen_test
-    def test_future_close_callback(self):
-        # Regression test for interaction between the Future read interfaces
-        # and IOStream._maybe_add_error_listener.
-        rs, ws = yield self.make_iostream_pair()
-        closed = [False]
-        cond = Condition()
-
-        def close_callback():
-            closed[0] = True
-            cond.notify()
-
-        rs.set_close_callback(close_callback)
-        try:
-            ws.write(b"a")
-            res = yield rs.read_bytes(1)
-            self.assertEqual(res, b"a")
-            self.assertFalse(closed[0])
-            ws.close()
-            yield cond.wait()
-            self.assertTrue(closed[0])
-        finally:
-            rs.close()
-            ws.close()
-
-    @gen_test
-    def test_write_memoryview(self):
-        rs, ws = yield self.make_iostream_pair()
-        try:
-            fut = rs.read_bytes(4)
-            ws.write(memoryview(b"hello"))
-            data = yield fut
-            self.assertEqual(data, b"hell")
-        finally:
-            ws.close()
-            rs.close()
-
-    @gen_test
-    def test_read_bytes_partial(self):
-        rs, ws = yield self.make_iostream_pair()
-        try:
-            # Ask for more than is available with partial=True
-            fut = rs.read_bytes(50, partial=True)
-            ws.write(b"hello")
-            data = yield fut
-            self.assertEqual(data, b"hello")
-
-            # Ask for less than what is available; num_bytes is still
-            # respected.
-            fut = rs.read_bytes(3, partial=True)
-            ws.write(b"world")
-            data = yield fut
-            self.assertEqual(data, b"wor")
-
-            # Partial reads won't return an empty string, but read_bytes(0)
-            # will.
-            data = yield rs.read_bytes(0, partial=True)
-            self.assertEqual(data, b"")
-        finally:
-            ws.close()
-            rs.close()
-
-    @gen_test
-    def test_read_until_max_bytes(self):
-        rs, ws = yield self.make_iostream_pair()
-        closed = Event()
-        rs.set_close_callback(closed.set)
-        try:
-            # Extra room under the limit
-            fut = rs.read_until(b"def", max_bytes=50)
-            ws.write(b"abcdef")
-            data = yield fut
-            self.assertEqual(data, b"abcdef")
-
-            # Just enough space
-            fut = rs.read_until(b"def", max_bytes=6)
-            ws.write(b"abcdef")
-            data = yield fut
-            self.assertEqual(data, b"abcdef")
-
-            # Not enough space, but we don't know it until all we can do is
-            # log a warning and close the connection.
-            with ExpectLog(gen_log, "Unsatisfiable read"):
-                fut = rs.read_until(b"def", max_bytes=5)
-                ws.write(b"123456")
-                yield closed.wait()
-        finally:
-            ws.close()
-            rs.close()
-
-    @gen_test
-    def test_read_until_max_bytes_inline(self):
-        rs, ws = yield self.make_iostream_pair()
-        closed = Event()
-        rs.set_close_callback(closed.set)
-        try:
-            # Similar to the error case in the previous test, but the
-            # ws writes first so rs reads are satisfied
-            # inline.  For consistency with the out-of-line case, we
-            # do not raise the error synchronously.
-            ws.write(b"123456")
-            with ExpectLog(gen_log, "Unsatisfiable read"):
-                with self.assertRaises(StreamClosedError):
-                    yield rs.read_until(b"def", max_bytes=5)
-            yield closed.wait()
-        finally:
-            ws.close()
-            rs.close()
-
-    @gen_test
-    def test_read_until_max_bytes_ignores_extra(self):
-        rs, ws = yield self.make_iostream_pair()
-        closed = Event()
-        rs.set_close_callback(closed.set)
-        try:
-            # Even though data that matches arrives the same packet that
-            # puts us over the limit, we fail the request because it was not
-            # found within the limit.
-            ws.write(b"abcdef")
-            with ExpectLog(gen_log, "Unsatisfiable read"):
-                rs.read_until(b"def", max_bytes=5)
-                yield closed.wait()
-        finally:
-            ws.close()
-            rs.close()
-
-    @gen_test
-    def test_read_until_regex_max_bytes(self):
-        rs, ws = yield self.make_iostream_pair()
-        closed = Event()
-        rs.set_close_callback(closed.set)
-        try:
-            # Extra room under the limit
-            fut = rs.read_until_regex(b"def", max_bytes=50)
-            ws.write(b"abcdef")
-            data = yield fut
-            self.assertEqual(data, b"abcdef")
-
-            # Just enough space
-            fut = rs.read_until_regex(b"def", max_bytes=6)
-            ws.write(b"abcdef")
-            data = yield fut
-            self.assertEqual(data, b"abcdef")
-
-            # Not enough space, but we don't know it until all we can do is
-            # log a warning and close the connection.
-            with ExpectLog(gen_log, "Unsatisfiable read"):
-                rs.read_until_regex(b"def", max_bytes=5)
-                ws.write(b"123456")
-                yield closed.wait()
-        finally:
-            ws.close()
-            rs.close()
-
-    @gen_test
-    def test_read_until_regex_max_bytes_inline(self):
-        rs, ws = yield self.make_iostream_pair()
-        closed = Event()
-        rs.set_close_callback(closed.set)
-        try:
-            # Similar to the error case in the previous test, but the
-            # ws writes first so rs reads are satisfied
-            # inline.  For consistency with the out-of-line case, we
-            # do not raise the error synchronously.
-            ws.write(b"123456")
-            with ExpectLog(gen_log, "Unsatisfiable read"):
-                rs.read_until_regex(b"def", max_bytes=5)
-                yield closed.wait()
-        finally:
-            ws.close()
-            rs.close()
-
-    @gen_test
-    def test_read_until_regex_max_bytes_ignores_extra(self):
-        rs, ws = yield self.make_iostream_pair()
-        closed = Event()
-        rs.set_close_callback(closed.set)
-        try:
-            # Even though data that matches arrives the same packet that
-            # puts us over the limit, we fail the request because it was not
-            # found within the limit.
-            ws.write(b"abcdef")
-            with ExpectLog(gen_log, "Unsatisfiable read"):
-                rs.read_until_regex(b"def", max_bytes=5)
-                yield closed.wait()
-        finally:
-            ws.close()
-            rs.close()
-
-    @gen_test
-    def test_small_reads_from_large_buffer(self):
-        # 10KB buffer size, 100KB available to read.
-        # Read 1KB at a time and make sure that the buffer is not eagerly
-        # filled.
-        rs, ws = yield self.make_iostream_pair(max_buffer_size=10 * 1024)
-        try:
-            ws.write(b"a" * 1024 * 100)
-            for i in range(100):
-                data = yield rs.read_bytes(1024)
-                self.assertEqual(data, b"a" * 1024)
-        finally:
-            ws.close()
-            rs.close()
-
-    @gen_test
-    def test_small_read_untils_from_large_buffer(self):
-        # 10KB buffer size, 100KB available to read.
-        # Read 1KB at a time and make sure that the buffer is not eagerly
-        # filled.
-        rs, ws = yield self.make_iostream_pair(max_buffer_size=10 * 1024)
-        try:
-            ws.write((b"a" * 1023 + b"\n") * 100)
-            for i in range(100):
-                data = yield rs.read_until(b"\n", max_bytes=4096)
-                self.assertEqual(data, b"a" * 1023 + b"\n")
-        finally:
-            ws.close()
-            rs.close()
-
-    @gen_test
-    def test_flow_control(self):
-        MB = 1024 * 1024
-        rs, ws = yield self.make_iostream_pair(max_buffer_size=5 * MB)
-        try:
-            # Client writes more than the rs will accept.
-            ws.write(b"a" * 10 * MB)
-            # The rs pauses while reading.
-            yield rs.read_bytes(MB)
-            yield gen.sleep(0.1)
-            # The ws's writes have been blocked; the rs can
-            # continue to read gradually.
-            for i in range(9):
-                yield rs.read_bytes(MB)
-        finally:
-            rs.close()
-            ws.close()
-
-    @gen_test
-    def test_read_into(self):
-        rs, ws = yield self.make_iostream_pair()
-
-        def sleep_some():
-            self.io_loop.run_sync(lambda: gen.sleep(0.05))
-
-        try:
-            buf = bytearray(10)
-            fut = rs.read_into(buf)
-            ws.write(b"hello")
-            yield gen.sleep(0.05)
-            self.assertTrue(rs.reading())
-            ws.write(b"world!!")
-            data = yield fut
-            self.assertFalse(rs.reading())
-            self.assertEqual(data, 10)
-            self.assertEqual(bytes(buf), b"helloworld")
-
-            # Existing buffer is fed into user buffer
-            fut = rs.read_into(buf)
-            yield gen.sleep(0.05)
-            self.assertTrue(rs.reading())
-            ws.write(b"1234567890")
-            data = yield fut
-            self.assertFalse(rs.reading())
-            self.assertEqual(data, 10)
-            self.assertEqual(bytes(buf), b"!!12345678")
-
-            # Existing buffer can satisfy read immediately
-            buf = bytearray(4)
-            ws.write(b"abcdefghi")
-            data = yield rs.read_into(buf)
-            self.assertEqual(data, 4)
-            self.assertEqual(bytes(buf), b"90ab")
-
-            data = yield rs.read_bytes(7)
-            self.assertEqual(data, b"cdefghi")
-        finally:
-            ws.close()
-            rs.close()
-
-    @gen_test
-    def test_read_into_partial(self):
-        rs, ws = yield self.make_iostream_pair()
-
-        try:
-            # Partial read
-            buf = bytearray(10)
-            fut = rs.read_into(buf, partial=True)
-            ws.write(b"hello")
-            data = yield fut
-            self.assertFalse(rs.reading())
-            self.assertEqual(data, 5)
-            self.assertEqual(bytes(buf), b"hello\0\0\0\0\0")
-
-            # Full read despite partial=True
-            ws.write(b"world!1234567890")
-            data = yield rs.read_into(buf, partial=True)
-            self.assertEqual(data, 10)
-            self.assertEqual(bytes(buf), b"world!1234")
-
-            # Existing buffer can satisfy read immediately
-            data = yield rs.read_into(buf, partial=True)
-            self.assertEqual(data, 6)
-            self.assertEqual(bytes(buf), b"5678901234")
-
-        finally:
-            ws.close()
-            rs.close()
-
-    @gen_test
-    def test_read_into_zero_bytes(self):
-        rs, ws = yield self.make_iostream_pair()
-        try:
-            buf = bytearray()
-            fut = rs.read_into(buf)
-            self.assertEqual(fut.result(), 0)
-        finally:
-            ws.close()
-            rs.close()
-
-    @gen_test
-    def test_many_mixed_reads(self):
-        # Stress buffer handling when going back and forth between
-        # read_bytes() (using an internal buffer) and read_into()
-        # (using a user-allocated buffer).
-        r = random.Random(42)
-        nbytes = 1000000
-        rs, ws = yield self.make_iostream_pair()
-
-        produce_hash = hashlib.sha1()
-        consume_hash = hashlib.sha1()
-
-        @gen.coroutine
-        def produce():
-            remaining = nbytes
-            while remaining > 0:
-                size = r.randint(1, min(1000, remaining))
-                data = os.urandom(size)
-                produce_hash.update(data)
-                yield ws.write(data)
-                remaining -= size
-            assert remaining == 0
-
-        @gen.coroutine
-        def consume():
-            remaining = nbytes
-            while remaining > 0:
-                if r.random() > 0.5:
-                    # read_bytes()
-                    size = r.randint(1, min(1000, remaining))
-                    data = yield rs.read_bytes(size)
-                    consume_hash.update(data)
-                    remaining -= size
-                else:
-                    # read_into()
-                    size = r.randint(1, min(1000, remaining))
-                    buf = bytearray(size)
-                    n = yield rs.read_into(buf)
-                    assert n == size
-                    consume_hash.update(buf)
-                    remaining -= size
-            assert remaining == 0
-
-        try:
-            yield [produce(), consume()]
-            assert produce_hash.hexdigest() == consume_hash.hexdigest()
-        finally:
-            ws.close()
-            rs.close()
-
-
-class TestIOStreamMixin(TestReadWriteMixin):
-    def _make_server_iostream(self, connection, **kwargs):
-        raise NotImplementedError()
-
-    def _make_client_iostream(self, connection, **kwargs):
-        raise NotImplementedError()
-
-    @gen.coroutine
-    def make_iostream_pair(self, **kwargs):
-        listener, port = bind_unused_port()
-        server_stream_fut = Future()  # type: Future[IOStream]
-
-        def accept_callback(connection, address):
-            server_stream_fut.set_result(
-                self._make_server_iostream(connection, **kwargs)
-            )
-
-        netutil.add_accept_handler(listener, accept_callback)
-        client_stream = self._make_client_iostream(socket.socket(), **kwargs)
-        connect_fut = client_stream.connect(("127.0.0.1", port))
-        server_stream, client_stream = yield [server_stream_fut, connect_fut]
-        self.io_loop.remove_handler(listener.fileno())
-        listener.close()
-        raise gen.Return((server_stream, client_stream))
-
-    @gen_test
-    def test_connection_refused(self):
-        # When a connection is refused, the connect callback should not
-        # be run.  (The kqueue IOLoop used to behave differently from the
-        # epoll IOLoop in this respect)
-        cleanup_func, port = refusing_port()
-        self.addCleanup(cleanup_func)
-        stream = IOStream(socket.socket())
-
-        stream.set_close_callback(self.stop)
-        # log messages vary by platform and ioloop implementation
-        with ExpectLog(gen_log, ".*", required=False):
-            with self.assertRaises(StreamClosedError):
-                yield stream.connect(("127.0.0.1", port))
-
-        self.assertTrue(isinstance(stream.error, socket.error), stream.error)
-        if sys.platform != "cygwin":
-            _ERRNO_CONNREFUSED = [errno.ECONNREFUSED]
-            if hasattr(errno, "WSAECONNREFUSED"):
-                _ERRNO_CONNREFUSED.append(errno.WSAECONNREFUSED)  # type: ignore
-            # cygwin's errnos don't match those used on native windows python
-            self.assertTrue(stream.error.args[0] in _ERRNO_CONNREFUSED)  # type: ignore
-
-    @gen_test
-    def test_gaierror(self):
-        # Test that IOStream sets its exc_info on getaddrinfo error.
-        # It's difficult to reliably trigger a getaddrinfo error;
-        # some resolvers own't even return errors for malformed names,
-        # so we mock it instead. If IOStream changes to call a Resolver
-        # before sock.connect, the mock target will need to change too.
-        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0)
-        stream = IOStream(s)
-        stream.set_close_callback(self.stop)
-        with mock.patch(
-            "socket.socket.connect", side_effect=socket.gaierror(errno.EIO, "boom")
-        ):
-            with self.assertRaises(StreamClosedError):
-                yield stream.connect(("localhost", 80))
-            self.assertTrue(isinstance(stream.error, socket.gaierror))
-
-    @gen_test
-    def test_read_until_close_with_error(self):
-        server, client = yield self.make_iostream_pair()
-        try:
-            with mock.patch(
-                "tornado.iostream.BaseIOStream._try_inline_read",
-                side_effect=IOError("boom"),
-            ):
-                with self.assertRaisesRegexp(IOError, "boom"):
-                    client.read_until_close()
-        finally:
-            server.close()
-            client.close()
-
-    @skipIfNonUnix
-    @skipPypy3V58
-    @gen_test
-    def test_inline_read_error(self):
-        # An error on an inline read is raised without logging (on the
-        # assumption that it will eventually be noticed or logged further
-        # up the stack).
-        #
-        # This test is posix-only because windows os.close() doesn't work
-        # on socket FDs, but we can't close the socket object normally
-        # because we won't get the error we want if the socket knows
-        # it's closed.
-        server, client = yield self.make_iostream_pair()
-        try:
-            os.close(server.socket.fileno())
-            with self.assertRaises(socket.error):
-                server.read_bytes(1)
-        finally:
-            server.close()
-            client.close()
-
-    @skipPypy3V58
-    @gen_test
-    def test_async_read_error_logging(self):
-        # Socket errors on asynchronous reads should be logged (but only
-        # once).
-        server, client = yield self.make_iostream_pair()
-        closed = Event()
-        server.set_close_callback(closed.set)
-        try:
-            # Start a read that will be fulfilled asynchronously.
-            server.read_bytes(1)
-            client.write(b"a")
-            # Stub out read_from_fd to make it fail.
-
-            def fake_read_from_fd():
-                os.close(server.socket.fileno())
-                server.__class__.read_from_fd(server)
-
-            server.read_from_fd = fake_read_from_fd
-            # This log message is from _handle_read (not read_from_fd).
-            with ExpectLog(gen_log, "error on read"):
-                yield closed.wait()
-        finally:
-            server.close()
-            client.close()
-
-    @gen_test
-    def test_future_write(self):
-        """
-        Test that write() Futures are never orphaned.
-        """
-        # Run concurrent writers that will write enough bytes so as to
-        # clog the socket buffer and accumulate bytes in our write buffer.
-        m, n = 5000, 1000
-        nproducers = 10
-        total_bytes = m * n * nproducers
-        server, client = yield self.make_iostream_pair(max_buffer_size=total_bytes)
-
-        @gen.coroutine
-        def produce():
-            data = b"x" * m
-            for i in range(n):
-                yield server.write(data)
-
-        @gen.coroutine
-        def consume():
-            nread = 0
-            while nread < total_bytes:
-                res = yield client.read_bytes(m)
-                nread += len(res)
-
-        try:
-            yield [produce() for i in range(nproducers)] + [consume()]
-        finally:
-            server.close()
-            client.close()
-
-
-class TestIOStreamWebHTTP(TestIOStreamWebMixin, AsyncHTTPTestCase):
-    def _make_client_iostream(self):
-        return IOStream(socket.socket())
-
-
-class TestIOStreamWebHTTPS(TestIOStreamWebMixin, AsyncHTTPSTestCase):
-    def _make_client_iostream(self):
-        return SSLIOStream(socket.socket(), ssl_options=dict(cert_reqs=ssl.CERT_NONE))
-
-
-class TestIOStream(TestIOStreamMixin, AsyncTestCase):
-    def _make_server_iostream(self, connection, **kwargs):
-        return IOStream(connection, **kwargs)
-
-    def _make_client_iostream(self, connection, **kwargs):
-        return IOStream(connection, **kwargs)
-
-
-class TestIOStreamSSL(TestIOStreamMixin, AsyncTestCase):
-    def _make_server_iostream(self, connection, **kwargs):
-        connection = ssl.wrap_socket(
-            connection,
-            server_side=True,
-            do_handshake_on_connect=False,
-            **_server_ssl_options()
-        )
-        return SSLIOStream(connection, **kwargs)
-
-    def _make_client_iostream(self, connection, **kwargs):
-        return SSLIOStream(
-            connection, ssl_options=dict(cert_reqs=ssl.CERT_NONE), **kwargs
-        )
-
-
-# This will run some tests that are basically redundant but it's the
-# simplest way to make sure that it works to pass an SSLContext
-# instead of an ssl_options dict to the SSLIOStream constructor.
-class TestIOStreamSSLContext(TestIOStreamMixin, AsyncTestCase):
-    def _make_server_iostream(self, connection, **kwargs):
-        context = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
-        context.load_cert_chain(
-            os.path.join(os.path.dirname(__file__), "test.crt"),
-            os.path.join(os.path.dirname(__file__), "test.key"),
-        )
-        connection = ssl_wrap_socket(
-            connection, context, server_side=True, do_handshake_on_connect=False
-        )
-        return SSLIOStream(connection, **kwargs)
-
-    def _make_client_iostream(self, connection, **kwargs):
-        context = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
-        return SSLIOStream(connection, ssl_options=context, **kwargs)
-
-
-class TestIOStreamStartTLS(AsyncTestCase):
-    def setUp(self):
-        try:
-            super(TestIOStreamStartTLS, self).setUp()
-            self.listener, self.port = bind_unused_port()
-            self.server_stream = None
-            self.server_accepted = Future()  # type: Future[None]
-            netutil.add_accept_handler(self.listener, self.accept)
-            self.client_stream = IOStream(socket.socket())
-            self.io_loop.add_future(
-                self.client_stream.connect(("127.0.0.1", self.port)), self.stop
-            )
-            self.wait()
-            self.io_loop.add_future(self.server_accepted, self.stop)
-            self.wait()
-        except Exception as e:
-            print(e)
-            raise
-
-    def tearDown(self):
-        if self.server_stream is not None:
-            self.server_stream.close()
-        if self.client_stream is not None:
-            self.client_stream.close()
-        self.listener.close()
-        super(TestIOStreamStartTLS, self).tearDown()
-
-    def accept(self, connection, address):
-        if self.server_stream is not None:
-            self.fail("should only get one connection")
-        self.server_stream = IOStream(connection)
-        self.server_accepted.set_result(None)
-
-    @gen.coroutine
-    def client_send_line(self, line):
-        self.client_stream.write(line)
-        recv_line = yield self.server_stream.read_until(b"\r\n")
-        self.assertEqual(line, recv_line)
-
-    @gen.coroutine
-    def server_send_line(self, line):
-        self.server_stream.write(line)
-        recv_line = yield self.client_stream.read_until(b"\r\n")
-        self.assertEqual(line, recv_line)
-
-    def client_start_tls(self, ssl_options=None, server_hostname=None):
-        client_stream = self.client_stream
-        self.client_stream = None
-        return client_stream.start_tls(False, ssl_options, server_hostname)
-
-    def server_start_tls(self, ssl_options=None):
-        server_stream = self.server_stream
-        self.server_stream = None
-        return server_stream.start_tls(True, ssl_options)
-
-    @gen_test
-    def test_start_tls_smtp(self):
-        # This flow is simplified from RFC 3207 section 5.
-        # We don't really need all of this, but it helps to make sure
-        # that after realistic back-and-forth traffic the buffers end up
-        # in a sane state.
-        yield self.server_send_line(b"220 mail.example.com ready\r\n")
-        yield self.client_send_line(b"EHLO mail.example.com\r\n")
-        yield self.server_send_line(b"250-mail.example.com welcome\r\n")
-        yield self.server_send_line(b"250 STARTTLS\r\n")
-        yield self.client_send_line(b"STARTTLS\r\n")
-        yield self.server_send_line(b"220 Go ahead\r\n")
-        client_future = self.client_start_tls(dict(cert_reqs=ssl.CERT_NONE))
-        server_future = self.server_start_tls(_server_ssl_options())
-        self.client_stream = yield client_future
-        self.server_stream = yield server_future
-        self.assertTrue(isinstance(self.client_stream, SSLIOStream))
-        self.assertTrue(isinstance(self.server_stream, SSLIOStream))
-        yield self.client_send_line(b"EHLO mail.example.com\r\n")
-        yield self.server_send_line(b"250 mail.example.com welcome\r\n")
-
-    @gen_test
-    def test_handshake_fail(self):
-        server_future = self.server_start_tls(_server_ssl_options())
-        # Certificates are verified with the default configuration.
-        with ExpectLog(gen_log, "SSL Error"):
-            client_future = self.client_start_tls(server_hostname="localhost")
-            with self.assertRaises(ssl.SSLError):
-                yield client_future
-            with self.assertRaises((ssl.SSLError, socket.error)):
-                yield server_future
-
-    @gen_test
-    def test_check_hostname(self):
-        # Test that server_hostname parameter to start_tls is being used.
-        # The check_hostname functionality is only available in python 2.7 and
-        # up and in python 3.4 and up.
-        server_future = self.server_start_tls(_server_ssl_options())
-        with ExpectLog(gen_log, "SSL Error"):
-            client_future = self.client_start_tls(
-                ssl.create_default_context(), server_hostname="127.0.0.1"
-            )
-            with self.assertRaises(ssl.SSLError):
-                # The client fails to connect with an SSL error.
-                yield client_future
-            with self.assertRaises(Exception):
-                # The server fails to connect, but the exact error is unspecified.
-                yield server_future
-
-
-class WaitForHandshakeTest(AsyncTestCase):
-    @gen.coroutine
-    def connect_to_server(self, server_cls):
-        server = client = None
-        try:
-            sock, port = bind_unused_port()
-            server = server_cls(ssl_options=_server_ssl_options())
-            server.add_socket(sock)
-
-            client = SSLIOStream(
-                socket.socket(), ssl_options=dict(cert_reqs=ssl.CERT_NONE)
-            )
-            yield client.connect(("127.0.0.1", port))
-            self.assertIsNotNone(client.socket.cipher())
-        finally:
-            if server is not None:
-                server.stop()
-            if client is not None:
-                client.close()
-
-    @gen_test
-    def test_wait_for_handshake_future(self):
-        test = self
-        handshake_future = Future()  # type: Future[None]
-
-        class TestServer(TCPServer):
-            def handle_stream(self, stream, address):
-                test.assertIsNone(stream.socket.cipher())
-                test.io_loop.spawn_callback(self.handle_connection, stream)
-
-            @gen.coroutine
-            def handle_connection(self, stream):
-                yield stream.wait_for_handshake()
-                handshake_future.set_result(None)
-
-        yield self.connect_to_server(TestServer)
-        yield handshake_future
-
-    @gen_test
-    def test_wait_for_handshake_already_waiting_error(self):
-        test = self
-        handshake_future = Future()  # type: Future[None]
-
-        class TestServer(TCPServer):
-            @gen.coroutine
-            def handle_stream(self, stream, address):
-                fut = stream.wait_for_handshake()
-                test.assertRaises(RuntimeError, stream.wait_for_handshake)
-                yield fut
-
-                handshake_future.set_result(None)
-
-        yield self.connect_to_server(TestServer)
-        yield handshake_future
-
-    @gen_test
-    def test_wait_for_handshake_already_connected(self):
-        handshake_future = Future()  # type: Future[None]
-
-        class TestServer(TCPServer):
-            @gen.coroutine
-            def handle_stream(self, stream, address):
-                yield stream.wait_for_handshake()
-                yield stream.wait_for_handshake()
-                handshake_future.set_result(None)
-
-        yield self.connect_to_server(TestServer)
-        yield handshake_future
-
-
-@skipIfNonUnix
-class TestPipeIOStream(TestReadWriteMixin, AsyncTestCase):
-    @gen.coroutine
-    def make_iostream_pair(self, **kwargs):
-        r, w = os.pipe()
-
-        return PipeIOStream(r, **kwargs), PipeIOStream(w, **kwargs)
-
-    @gen_test
-    def test_pipe_iostream(self):
-        rs, ws = yield self.make_iostream_pair()
-
-        ws.write(b"hel")
-        ws.write(b"lo world")
-
-        data = yield rs.read_until(b" ")
-        self.assertEqual(data, b"hello ")
-
-        data = yield rs.read_bytes(3)
-        self.assertEqual(data, b"wor")
-
-        ws.close()
-
-        data = yield rs.read_until_close()
-        self.assertEqual(data, b"ld")
-
-        rs.close()
-
-    @gen_test
-    def test_pipe_iostream_big_write(self):
-        rs, ws = yield self.make_iostream_pair()
-
-        NUM_BYTES = 1048576
-
-        # Write 1MB of data, which should fill the buffer
-        ws.write(b"1" * NUM_BYTES)
-
-        data = yield rs.read_bytes(NUM_BYTES)
-        self.assertEqual(data, b"1" * NUM_BYTES)
-
-        ws.close()
-        rs.close()
-
-
-class TestStreamBuffer(unittest.TestCase):
-    """
-    Unit tests for the private _StreamBuffer class.
-    """
-
-    def setUp(self):
-        self.random = random.Random(42)
-
-    def to_bytes(self, b):
-        if isinstance(b, (bytes, bytearray)):
-            return bytes(b)
-        elif isinstance(b, memoryview):
-            return b.tobytes()  # For py2
-        else:
-            raise TypeError(b)
-
-    def make_streambuffer(self, large_buf_threshold=10):
-        buf = _StreamBuffer()
-        assert buf._large_buf_threshold
-        buf._large_buf_threshold = large_buf_threshold
-        return buf
-
-    def check_peek(self, buf, expected):
-        size = 1
-        while size < 2 * len(expected):
-            got = self.to_bytes(buf.peek(size))
-            self.assertTrue(got)  # Not empty
-            self.assertLessEqual(len(got), size)
-            self.assertTrue(expected.startswith(got), (expected, got))
-            size = (size * 3 + 1) // 2
-
-    def check_append_all_then_skip_all(self, buf, objs, input_type):
-        self.assertEqual(len(buf), 0)
-
-        expected = b""
-
-        for o in objs:
-            expected += o
-            buf.append(input_type(o))
-            self.assertEqual(len(buf), len(expected))
-            self.check_peek(buf, expected)
-
-        while expected:
-            n = self.random.randrange(1, len(expected) + 1)
-            expected = expected[n:]
-            buf.advance(n)
-            self.assertEqual(len(buf), len(expected))
-            self.check_peek(buf, expected)
-
-        self.assertEqual(len(buf), 0)
-
-    def test_small(self):
-        objs = [b"12", b"345", b"67", b"89a", b"bcde", b"fgh", b"ijklmn"]
-
-        buf = self.make_streambuffer()
-        self.check_append_all_then_skip_all(buf, objs, bytes)
-
-        buf = self.make_streambuffer()
-        self.check_append_all_then_skip_all(buf, objs, bytearray)
-
-        buf = self.make_streambuffer()
-        self.check_append_all_then_skip_all(buf, objs, memoryview)
-
-        # Test internal algorithm
-        buf = self.make_streambuffer(10)
-        for i in range(9):
-            buf.append(b"x")
-        self.assertEqual(len(buf._buffers), 1)
-        for i in range(9):
-            buf.append(b"x")
-        self.assertEqual(len(buf._buffers), 2)
-        buf.advance(10)
-        self.assertEqual(len(buf._buffers), 1)
-        buf.advance(8)
-        self.assertEqual(len(buf._buffers), 0)
-        self.assertEqual(len(buf), 0)
-
-    def test_large(self):
-        objs = [
-            b"12" * 5,
-            b"345" * 2,
-            b"67" * 20,
-            b"89a" * 12,
-            b"bcde" * 1,
-            b"fgh" * 7,
-            b"ijklmn" * 2,
-        ]
-
-        buf = self.make_streambuffer()
-        self.check_append_all_then_skip_all(buf, objs, bytes)
-
-        buf = self.make_streambuffer()
-        self.check_append_all_then_skip_all(buf, objs, bytearray)
-
-        buf = self.make_streambuffer()
-        self.check_append_all_then_skip_all(buf, objs, memoryview)
-
-        # Test internal algorithm
-        buf = self.make_streambuffer(10)
-        for i in range(3):
-            buf.append(b"x" * 11)
-        self.assertEqual(len(buf._buffers), 3)
-        buf.append(b"y")
-        self.assertEqual(len(buf._buffers), 4)
-        buf.append(b"z")
-        self.assertEqual(len(buf._buffers), 4)
-        buf.advance(33)
-        self.assertEqual(len(buf._buffers), 1)
-        buf.advance(2)
-        self.assertEqual(len(buf._buffers), 0)
-        self.assertEqual(len(buf), 0)
diff --git a/venv/lib/python3.7/site-packages/tornado/test/locale_test.py b/venv/lib/python3.7/site-packages/tornado/test/locale_test.py
deleted file mode 100644
index a12dc98..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/locale_test.py
+++ /dev/null
@@ -1,151 +0,0 @@
-import datetime
-import os
-import shutil
-import tempfile
-import unittest
-
-import tornado.locale
-from tornado.escape import utf8, to_unicode
-from tornado.util import unicode_type
-
-
-class TranslationLoaderTest(unittest.TestCase):
-    # TODO: less hacky way to get isolated tests
-    SAVE_VARS = ["_translations", "_supported_locales", "_use_gettext"]
-
-    def clear_locale_cache(self):
-        tornado.locale.Locale._cache = {}
-
-    def setUp(self):
-        self.saved = {}  # type: dict
-        for var in TranslationLoaderTest.SAVE_VARS:
-            self.saved[var] = getattr(tornado.locale, var)
-        self.clear_locale_cache()
-
-    def tearDown(self):
-        for k, v in self.saved.items():
-            setattr(tornado.locale, k, v)
-        self.clear_locale_cache()
-
-    def test_csv(self):
-        tornado.locale.load_translations(
-            os.path.join(os.path.dirname(__file__), "csv_translations")
-        )
-        locale = tornado.locale.get("fr_FR")
-        self.assertTrue(isinstance(locale, tornado.locale.CSVLocale))
-        self.assertEqual(locale.translate("school"), u"\u00e9cole")
-
-    def test_csv_bom(self):
-        with open(
-            os.path.join(os.path.dirname(__file__), "csv_translations", "fr_FR.csv"),
-            "rb",
-        ) as f:
-            char_data = to_unicode(f.read())
-        # Re-encode our input data (which is utf-8 without BOM) in
-        # encodings that use the BOM and ensure that we can still load
-        # it. Note that utf-16-le and utf-16-be do not write a BOM,
-        # so we only test whichver variant is native to our platform.
-        for encoding in ["utf-8-sig", "utf-16"]:
-            tmpdir = tempfile.mkdtemp()
-            try:
-                with open(os.path.join(tmpdir, "fr_FR.csv"), "wb") as f:
-                    f.write(char_data.encode(encoding))
-                tornado.locale.load_translations(tmpdir)
-                locale = tornado.locale.get("fr_FR")
-                self.assertIsInstance(locale, tornado.locale.CSVLocale)
-                self.assertEqual(locale.translate("school"), u"\u00e9cole")
-            finally:
-                shutil.rmtree(tmpdir)
-
-    def test_gettext(self):
-        tornado.locale.load_gettext_translations(
-            os.path.join(os.path.dirname(__file__), "gettext_translations"),
-            "tornado_test",
-        )
-        locale = tornado.locale.get("fr_FR")
-        self.assertTrue(isinstance(locale, tornado.locale.GettextLocale))
-        self.assertEqual(locale.translate("school"), u"\u00e9cole")
-        self.assertEqual(locale.pgettext("law", "right"), u"le droit")
-        self.assertEqual(locale.pgettext("good", "right"), u"le bien")
-        self.assertEqual(
-            locale.pgettext("organization", "club", "clubs", 1), u"le club"
-        )
-        self.assertEqual(
-            locale.pgettext("organization", "club", "clubs", 2), u"les clubs"
-        )
-        self.assertEqual(locale.pgettext("stick", "club", "clubs", 1), u"le b\xe2ton")
-        self.assertEqual(locale.pgettext("stick", "club", "clubs", 2), u"les b\xe2tons")
-
-
-class LocaleDataTest(unittest.TestCase):
-    def test_non_ascii_name(self):
-        name = tornado.locale.LOCALE_NAMES["es_LA"]["name"]
-        self.assertTrue(isinstance(name, unicode_type))
-        self.assertEqual(name, u"Espa\u00f1ol")
-        self.assertEqual(utf8(name), b"Espa\xc3\xb1ol")
-
-
-class EnglishTest(unittest.TestCase):
-    def test_format_date(self):
-        locale = tornado.locale.get("en_US")
-        date = datetime.datetime(2013, 4, 28, 18, 35)
-        self.assertEqual(
-            locale.format_date(date, full_format=True), "April 28, 2013 at 6:35 pm"
-        )
-
-        now = datetime.datetime.utcnow()
-
-        self.assertEqual(
-            locale.format_date(now - datetime.timedelta(seconds=2), full_format=False),
-            "2 seconds ago",
-        )
-        self.assertEqual(
-            locale.format_date(now - datetime.timedelta(minutes=2), full_format=False),
-            "2 minutes ago",
-        )
-        self.assertEqual(
-            locale.format_date(now - datetime.timedelta(hours=2), full_format=False),
-            "2 hours ago",
-        )
-
-        self.assertEqual(
-            locale.format_date(
-                now - datetime.timedelta(days=1), full_format=False, shorter=True
-            ),
-            "yesterday",
-        )
-
-        date = now - datetime.timedelta(days=2)
-        self.assertEqual(
-            locale.format_date(date, full_format=False, shorter=True),
-            locale._weekdays[date.weekday()],
-        )
-
-        date = now - datetime.timedelta(days=300)
-        self.assertEqual(
-            locale.format_date(date, full_format=False, shorter=True),
-            "%s %d" % (locale._months[date.month - 1], date.day),
-        )
-
-        date = now - datetime.timedelta(days=500)
-        self.assertEqual(
-            locale.format_date(date, full_format=False, shorter=True),
-            "%s %d, %d" % (locale._months[date.month - 1], date.day, date.year),
-        )
-
-    def test_friendly_number(self):
-        locale = tornado.locale.get("en_US")
-        self.assertEqual(locale.friendly_number(1000000), "1,000,000")
-
-    def test_list(self):
-        locale = tornado.locale.get("en_US")
-        self.assertEqual(locale.list([]), "")
-        self.assertEqual(locale.list(["A"]), "A")
-        self.assertEqual(locale.list(["A", "B"]), "A and B")
-        self.assertEqual(locale.list(["A", "B", "C"]), "A, B and C")
-
-    def test_format_day(self):
-        locale = tornado.locale.get("en_US")
-        date = datetime.datetime(2013, 4, 28, 18, 35)
-        self.assertEqual(locale.format_day(date=date, dow=True), "Sunday, April 28")
-        self.assertEqual(locale.format_day(date=date, dow=False), "April 28")
diff --git a/venv/lib/python3.7/site-packages/tornado/test/locks_test.py b/venv/lib/python3.7/site-packages/tornado/test/locks_test.py
deleted file mode 100644
index 7f88ab3..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/locks_test.py
+++ /dev/null
@@ -1,535 +0,0 @@
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-import asyncio
-from datetime import timedelta
-import typing  # noqa: F401
-import unittest
-
-from tornado import gen, locks
-from tornado.gen import TimeoutError
-from tornado.testing import gen_test, AsyncTestCase
-
-
-class ConditionTest(AsyncTestCase):
-    def setUp(self):
-        super(ConditionTest, self).setUp()
-        self.history = []  # type: typing.List[typing.Union[int, str]]
-
-    def record_done(self, future, key):
-        """Record the resolution of a Future returned by Condition.wait."""
-
-        def callback(_):
-            if not future.result():
-                # wait() resolved to False, meaning it timed out.
-                self.history.append("timeout")
-            else:
-                self.history.append(key)
-
-        future.add_done_callback(callback)
-
-    def loop_briefly(self):
-        """Run all queued callbacks on the IOLoop.
-
-        In these tests, this method is used after calling notify() to
-        preserve the pre-5.0 behavior in which callbacks ran
-        synchronously.
-        """
-        self.io_loop.add_callback(self.stop)
-        self.wait()
-
-    def test_repr(self):
-        c = locks.Condition()
-        self.assertIn("Condition", repr(c))
-        self.assertNotIn("waiters", repr(c))
-        c.wait()
-        self.assertIn("waiters", repr(c))
-
-    @gen_test
-    def test_notify(self):
-        c = locks.Condition()
-        self.io_loop.call_later(0.01, c.notify)
-        yield c.wait()
-
-    def test_notify_1(self):
-        c = locks.Condition()
-        self.record_done(c.wait(), "wait1")
-        self.record_done(c.wait(), "wait2")
-        c.notify(1)
-        self.loop_briefly()
-        self.history.append("notify1")
-        c.notify(1)
-        self.loop_briefly()
-        self.history.append("notify2")
-        self.assertEqual(["wait1", "notify1", "wait2", "notify2"], self.history)
-
-    def test_notify_n(self):
-        c = locks.Condition()
-        for i in range(6):
-            self.record_done(c.wait(), i)
-
-        c.notify(3)
-        self.loop_briefly()
-
-        # Callbacks execute in the order they were registered.
-        self.assertEqual(list(range(3)), self.history)
-        c.notify(1)
-        self.loop_briefly()
-        self.assertEqual(list(range(4)), self.history)
-        c.notify(2)
-        self.loop_briefly()
-        self.assertEqual(list(range(6)), self.history)
-
-    def test_notify_all(self):
-        c = locks.Condition()
-        for i in range(4):
-            self.record_done(c.wait(), i)
-
-        c.notify_all()
-        self.loop_briefly()
-        self.history.append("notify_all")
-
-        # Callbacks execute in the order they were registered.
-        self.assertEqual(list(range(4)) + ["notify_all"], self.history)  # type: ignore
-
-    @gen_test
-    def test_wait_timeout(self):
-        c = locks.Condition()
-        wait = c.wait(timedelta(seconds=0.01))
-        self.io_loop.call_later(0.02, c.notify)  # Too late.
-        yield gen.sleep(0.03)
-        self.assertFalse((yield wait))
-
-    @gen_test
-    def test_wait_timeout_preempted(self):
-        c = locks.Condition()
-
-        # This fires before the wait times out.
-        self.io_loop.call_later(0.01, c.notify)
-        wait = c.wait(timedelta(seconds=0.02))
-        yield gen.sleep(0.03)
-        yield wait  # No TimeoutError.
-
-    @gen_test
-    def test_notify_n_with_timeout(self):
-        # Register callbacks 0, 1, 2, and 3. Callback 1 has a timeout.
-        # Wait for that timeout to expire, then do notify(2) and make
-        # sure everyone runs. Verifies that a timed-out callback does
-        # not count against the 'n' argument to notify().
-        c = locks.Condition()
-        self.record_done(c.wait(), 0)
-        self.record_done(c.wait(timedelta(seconds=0.01)), 1)
-        self.record_done(c.wait(), 2)
-        self.record_done(c.wait(), 3)
-
-        # Wait for callback 1 to time out.
-        yield gen.sleep(0.02)
-        self.assertEqual(["timeout"], self.history)
-
-        c.notify(2)
-        yield gen.sleep(0.01)
-        self.assertEqual(["timeout", 0, 2], self.history)
-        self.assertEqual(["timeout", 0, 2], self.history)
-        c.notify()
-        yield
-        self.assertEqual(["timeout", 0, 2, 3], self.history)
-
-    @gen_test
-    def test_notify_all_with_timeout(self):
-        c = locks.Condition()
-        self.record_done(c.wait(), 0)
-        self.record_done(c.wait(timedelta(seconds=0.01)), 1)
-        self.record_done(c.wait(), 2)
-
-        # Wait for callback 1 to time out.
-        yield gen.sleep(0.02)
-        self.assertEqual(["timeout"], self.history)
-
-        c.notify_all()
-        yield
-        self.assertEqual(["timeout", 0, 2], self.history)
-
-    @gen_test
-    def test_nested_notify(self):
-        # Ensure no notifications lost, even if notify() is reentered by a
-        # waiter calling notify().
-        c = locks.Condition()
-
-        # Three waiters.
-        futures = [asyncio.ensure_future(c.wait()) for _ in range(3)]
-
-        # First and second futures resolved. Second future reenters notify(),
-        # resolving third future.
-        futures[1].add_done_callback(lambda _: c.notify())
-        c.notify(2)
-        yield
-        self.assertTrue(all(f.done() for f in futures))
-
-    @gen_test
-    def test_garbage_collection(self):
-        # Test that timed-out waiters are occasionally cleaned from the queue.
-        c = locks.Condition()
-        for _ in range(101):
-            c.wait(timedelta(seconds=0.01))
-
-        future = asyncio.ensure_future(c.wait())
-        self.assertEqual(102, len(c._waiters))
-
-        # Let first 101 waiters time out, triggering a collection.
-        yield gen.sleep(0.02)
-        self.assertEqual(1, len(c._waiters))
-
-        # Final waiter is still active.
-        self.assertFalse(future.done())
-        c.notify()
-        self.assertTrue(future.done())
-
-
-class EventTest(AsyncTestCase):
-    def test_repr(self):
-        event = locks.Event()
-        self.assertTrue("clear" in str(event))
-        self.assertFalse("set" in str(event))
-        event.set()
-        self.assertFalse("clear" in str(event))
-        self.assertTrue("set" in str(event))
-
-    def test_event(self):
-        e = locks.Event()
-        future_0 = asyncio.ensure_future(e.wait())
-        e.set()
-        future_1 = asyncio.ensure_future(e.wait())
-        e.clear()
-        future_2 = asyncio.ensure_future(e.wait())
-
-        self.assertTrue(future_0.done())
-        self.assertTrue(future_1.done())
-        self.assertFalse(future_2.done())
-
-    @gen_test
-    def test_event_timeout(self):
-        e = locks.Event()
-        with self.assertRaises(TimeoutError):
-            yield e.wait(timedelta(seconds=0.01))
-
-        # After a timed-out waiter, normal operation works.
-        self.io_loop.add_timeout(timedelta(seconds=0.01), e.set)
-        yield e.wait(timedelta(seconds=1))
-
-    def test_event_set_multiple(self):
-        e = locks.Event()
-        e.set()
-        e.set()
-        self.assertTrue(e.is_set())
-
-    def test_event_wait_clear(self):
-        e = locks.Event()
-        f0 = asyncio.ensure_future(e.wait())
-        e.clear()
-        f1 = asyncio.ensure_future(e.wait())
-        e.set()
-        self.assertTrue(f0.done())
-        self.assertTrue(f1.done())
-
-
-class SemaphoreTest(AsyncTestCase):
-    def test_negative_value(self):
-        self.assertRaises(ValueError, locks.Semaphore, value=-1)
-
-    def test_repr(self):
-        sem = locks.Semaphore()
-        self.assertIn("Semaphore", repr(sem))
-        self.assertIn("unlocked,value:1", repr(sem))
-        sem.acquire()
-        self.assertIn("locked", repr(sem))
-        self.assertNotIn("waiters", repr(sem))
-        sem.acquire()
-        self.assertIn("waiters", repr(sem))
-
-    def test_acquire(self):
-        sem = locks.Semaphore()
-        f0 = asyncio.ensure_future(sem.acquire())
-        self.assertTrue(f0.done())
-
-        # Wait for release().
-        f1 = asyncio.ensure_future(sem.acquire())
-        self.assertFalse(f1.done())
-        f2 = asyncio.ensure_future(sem.acquire())
-        sem.release()
-        self.assertTrue(f1.done())
-        self.assertFalse(f2.done())
-        sem.release()
-        self.assertTrue(f2.done())
-
-        sem.release()
-        # Now acquire() is instant.
-        self.assertTrue(asyncio.ensure_future(sem.acquire()).done())
-        self.assertEqual(0, len(sem._waiters))
-
-    @gen_test
-    def test_acquire_timeout(self):
-        sem = locks.Semaphore(2)
-        yield sem.acquire()
-        yield sem.acquire()
-        acquire = sem.acquire(timedelta(seconds=0.01))
-        self.io_loop.call_later(0.02, sem.release)  # Too late.
-        yield gen.sleep(0.3)
-        with self.assertRaises(gen.TimeoutError):
-            yield acquire
-
-        sem.acquire()
-        f = asyncio.ensure_future(sem.acquire())
-        self.assertFalse(f.done())
-        sem.release()
-        self.assertTrue(f.done())
-
-    @gen_test
-    def test_acquire_timeout_preempted(self):
-        sem = locks.Semaphore(1)
-        yield sem.acquire()
-
-        # This fires before the wait times out.
-        self.io_loop.call_later(0.01, sem.release)
-        acquire = sem.acquire(timedelta(seconds=0.02))
-        yield gen.sleep(0.03)
-        yield acquire  # No TimeoutError.
-
-    def test_release_unacquired(self):
-        # Unbounded releases are allowed, and increment the semaphore's value.
-        sem = locks.Semaphore()
-        sem.release()
-        sem.release()
-
-        # Now the counter is 3. We can acquire three times before blocking.
-        self.assertTrue(asyncio.ensure_future(sem.acquire()).done())
-        self.assertTrue(asyncio.ensure_future(sem.acquire()).done())
-        self.assertTrue(asyncio.ensure_future(sem.acquire()).done())
-        self.assertFalse(asyncio.ensure_future(sem.acquire()).done())
-
-    @gen_test
-    def test_garbage_collection(self):
-        # Test that timed-out waiters are occasionally cleaned from the queue.
-        sem = locks.Semaphore(value=0)
-        futures = [
-            asyncio.ensure_future(sem.acquire(timedelta(seconds=0.01)))
-            for _ in range(101)
-        ]
-
-        future = asyncio.ensure_future(sem.acquire())
-        self.assertEqual(102, len(sem._waiters))
-
-        # Let first 101 waiters time out, triggering a collection.
-        yield gen.sleep(0.02)
-        self.assertEqual(1, len(sem._waiters))
-
-        # Final waiter is still active.
-        self.assertFalse(future.done())
-        sem.release()
-        self.assertTrue(future.done())
-
-        # Prevent "Future exception was never retrieved" messages.
-        for future in futures:
-            self.assertRaises(TimeoutError, future.result)
-
-
-class SemaphoreContextManagerTest(AsyncTestCase):
-    @gen_test
-    def test_context_manager(self):
-        sem = locks.Semaphore()
-        with (yield sem.acquire()) as yielded:
-            self.assertTrue(yielded is None)
-
-        # Semaphore was released and can be acquired again.
-        self.assertTrue(asyncio.ensure_future(sem.acquire()).done())
-
-    @gen_test
-    def test_context_manager_async_await(self):
-        # Repeat the above test using 'async with'.
-        sem = locks.Semaphore()
-
-        async def f():
-            async with sem as yielded:
-                self.assertTrue(yielded is None)
-
-        yield f()
-
-        # Semaphore was released and can be acquired again.
-        self.assertTrue(asyncio.ensure_future(sem.acquire()).done())
-
-    @gen_test
-    def test_context_manager_exception(self):
-        sem = locks.Semaphore()
-        with self.assertRaises(ZeroDivisionError):
-            with (yield sem.acquire()):
-                1 / 0
-
-        # Semaphore was released and can be acquired again.
-        self.assertTrue(asyncio.ensure_future(sem.acquire()).done())
-
-    @gen_test
-    def test_context_manager_timeout(self):
-        sem = locks.Semaphore()
-        with (yield sem.acquire(timedelta(seconds=0.01))):
-            pass
-
-        # Semaphore was released and can be acquired again.
-        self.assertTrue(asyncio.ensure_future(sem.acquire()).done())
-
-    @gen_test
-    def test_context_manager_timeout_error(self):
-        sem = locks.Semaphore(value=0)
-        with self.assertRaises(gen.TimeoutError):
-            with (yield sem.acquire(timedelta(seconds=0.01))):
-                pass
-
-        # Counter is still 0.
-        self.assertFalse(asyncio.ensure_future(sem.acquire()).done())
-
-    @gen_test
-    def test_context_manager_contended(self):
-        sem = locks.Semaphore()
-        history = []
-
-        @gen.coroutine
-        def f(index):
-            with (yield sem.acquire()):
-                history.append("acquired %d" % index)
-                yield gen.sleep(0.01)
-                history.append("release %d" % index)
-
-        yield [f(i) for i in range(2)]
-
-        expected_history = []
-        for i in range(2):
-            expected_history.extend(["acquired %d" % i, "release %d" % i])
-
-        self.assertEqual(expected_history, history)
-
-    @gen_test
-    def test_yield_sem(self):
-        # Ensure we catch a "with (yield sem)", which should be
-        # "with (yield sem.acquire())".
-        with self.assertRaises(gen.BadYieldError):
-            with (yield locks.Semaphore()):
-                pass
-
-    def test_context_manager_misuse(self):
-        # Ensure we catch a "with sem", which should be
-        # "with (yield sem.acquire())".
-        with self.assertRaises(RuntimeError):
-            with locks.Semaphore():
-                pass
-
-
-class BoundedSemaphoreTest(AsyncTestCase):
-    def test_release_unacquired(self):
-        sem = locks.BoundedSemaphore()
-        self.assertRaises(ValueError, sem.release)
-        # Value is 0.
-        sem.acquire()
-        # Block on acquire().
-        future = asyncio.ensure_future(sem.acquire())
-        self.assertFalse(future.done())
-        sem.release()
-        self.assertTrue(future.done())
-        # Value is 1.
-        sem.release()
-        self.assertRaises(ValueError, sem.release)
-
-
-class LockTests(AsyncTestCase):
-    def test_repr(self):
-        lock = locks.Lock()
-        # No errors.
-        repr(lock)
-        lock.acquire()
-        repr(lock)
-
-    def test_acquire_release(self):
-        lock = locks.Lock()
-        self.assertTrue(asyncio.ensure_future(lock.acquire()).done())
-        future = asyncio.ensure_future(lock.acquire())
-        self.assertFalse(future.done())
-        lock.release()
-        self.assertTrue(future.done())
-
-    @gen_test
-    def test_acquire_fifo(self):
-        lock = locks.Lock()
-        self.assertTrue(asyncio.ensure_future(lock.acquire()).done())
-        N = 5
-        history = []
-
-        @gen.coroutine
-        def f(idx):
-            with (yield lock.acquire()):
-                history.append(idx)
-
-        futures = [f(i) for i in range(N)]
-        self.assertFalse(any(future.done() for future in futures))
-        lock.release()
-        yield futures
-        self.assertEqual(list(range(N)), history)
-
-    @gen_test
-    def test_acquire_fifo_async_with(self):
-        # Repeat the above test using `async with lock:`
-        # instead of `with (yield lock.acquire()):`.
-        lock = locks.Lock()
-        self.assertTrue(asyncio.ensure_future(lock.acquire()).done())
-        N = 5
-        history = []
-
-        async def f(idx):
-            async with lock:
-                history.append(idx)
-
-        futures = [f(i) for i in range(N)]
-        lock.release()
-        yield futures
-        self.assertEqual(list(range(N)), history)
-
-    @gen_test
-    def test_acquire_timeout(self):
-        lock = locks.Lock()
-        lock.acquire()
-        with self.assertRaises(gen.TimeoutError):
-            yield lock.acquire(timeout=timedelta(seconds=0.01))
-
-        # Still locked.
-        self.assertFalse(asyncio.ensure_future(lock.acquire()).done())
-
-    def test_multi_release(self):
-        lock = locks.Lock()
-        self.assertRaises(RuntimeError, lock.release)
-        lock.acquire()
-        lock.release()
-        self.assertRaises(RuntimeError, lock.release)
-
-    @gen_test
-    def test_yield_lock(self):
-        # Ensure we catch a "with (yield lock)", which should be
-        # "with (yield lock.acquire())".
-        with self.assertRaises(gen.BadYieldError):
-            with (yield locks.Lock()):
-                pass
-
-    def test_context_manager_misuse(self):
-        # Ensure we catch a "with lock", which should be
-        # "with (yield lock.acquire())".
-        with self.assertRaises(RuntimeError):
-            with locks.Lock():
-                pass
-
-
-if __name__ == "__main__":
-    unittest.main()
diff --git a/venv/lib/python3.7/site-packages/tornado/test/log_test.py b/venv/lib/python3.7/site-packages/tornado/test/log_test.py
deleted file mode 100644
index cb0157b..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/log_test.py
+++ /dev/null
@@ -1,245 +0,0 @@
-#
-# Copyright 2012 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-import contextlib
-import glob
-import logging
-import os
-import re
-import subprocess
-import sys
-import tempfile
-import unittest
-import warnings
-
-from tornado.escape import utf8
-from tornado.log import LogFormatter, define_logging_options, enable_pretty_logging
-from tornado.options import OptionParser
-from tornado.util import basestring_type
-
-
-@contextlib.contextmanager
-def ignore_bytes_warning():
-    with warnings.catch_warnings():
-        warnings.simplefilter("ignore", category=BytesWarning)
-        yield
-
-
-class LogFormatterTest(unittest.TestCase):
-    # Matches the output of a single logging call (which may be multiple lines
-    # if a traceback was included, so we use the DOTALL option)
-    LINE_RE = re.compile(
-        b"(?s)\x01\\[E [0-9]{6} [0-9]{2}:[0-9]{2}:[0-9]{2} log_test:[0-9]+\\]\x02 (.*)"
-    )
-
-    def setUp(self):
-        self.formatter = LogFormatter(color=False)
-        # Fake color support.  We can't guarantee anything about the $TERM
-        # variable when the tests are run, so just patch in some values
-        # for testing.  (testing with color off fails to expose some potential
-        # encoding issues from the control characters)
-        self.formatter._colors = {logging.ERROR: u"\u0001"}
-        self.formatter._normal = u"\u0002"
-        # construct a Logger directly to bypass getLogger's caching
-        self.logger = logging.Logger("LogFormatterTest")
-        self.logger.propagate = False
-        self.tempdir = tempfile.mkdtemp()
-        self.filename = os.path.join(self.tempdir, "log.out")
-        self.handler = self.make_handler(self.filename)
-        self.handler.setFormatter(self.formatter)
-        self.logger.addHandler(self.handler)
-
-    def tearDown(self):
-        self.handler.close()
-        os.unlink(self.filename)
-        os.rmdir(self.tempdir)
-
-    def make_handler(self, filename):
-        # Base case: default setup without explicit encoding.
-        # In python 2, supports arbitrary byte strings and unicode objects
-        # that contain only ascii.  In python 3, supports ascii-only unicode
-        # strings (but byte strings will be repr'd automatically).
-        return logging.FileHandler(filename)
-
-    def get_output(self):
-        with open(self.filename, "rb") as f:
-            line = f.read().strip()
-            m = LogFormatterTest.LINE_RE.match(line)
-            if m:
-                return m.group(1)
-            else:
-                raise Exception("output didn't match regex: %r" % line)
-
-    def test_basic_logging(self):
-        self.logger.error("foo")
-        self.assertEqual(self.get_output(), b"foo")
-
-    def test_bytes_logging(self):
-        with ignore_bytes_warning():
-            # This will be "\xe9" on python 2 or "b'\xe9'" on python 3
-            self.logger.error(b"\xe9")
-            self.assertEqual(self.get_output(), utf8(repr(b"\xe9")))
-
-    def test_utf8_logging(self):
-        with ignore_bytes_warning():
-            self.logger.error(u"\u00e9".encode("utf8"))
-        if issubclass(bytes, basestring_type):
-            # on python 2, utf8 byte strings (and by extension ascii byte
-            # strings) are passed through as-is.
-            self.assertEqual(self.get_output(), utf8(u"\u00e9"))
-        else:
-            # on python 3, byte strings always get repr'd even if
-            # they're ascii-only, so this degenerates into another
-            # copy of test_bytes_logging.
-            self.assertEqual(self.get_output(), utf8(repr(utf8(u"\u00e9"))))
-
-    def test_bytes_exception_logging(self):
-        try:
-            raise Exception(b"\xe9")
-        except Exception:
-            self.logger.exception("caught exception")
-        # This will be "Exception: \xe9" on python 2 or
-        # "Exception: b'\xe9'" on python 3.
-        output = self.get_output()
-        self.assertRegexpMatches(output, br"Exception.*\\xe9")
-        # The traceback contains newlines, which should not have been escaped.
-        self.assertNotIn(br"\n", output)
-
-
-class UnicodeLogFormatterTest(LogFormatterTest):
-    def make_handler(self, filename):
-        # Adding an explicit encoding configuration allows non-ascii unicode
-        # strings in both python 2 and 3, without changing the behavior
-        # for byte strings.
-        return logging.FileHandler(filename, encoding="utf8")
-
-    def test_unicode_logging(self):
-        self.logger.error(u"\u00e9")
-        self.assertEqual(self.get_output(), utf8(u"\u00e9"))
-
-
-class EnablePrettyLoggingTest(unittest.TestCase):
-    def setUp(self):
-        super(EnablePrettyLoggingTest, self).setUp()
-        self.options = OptionParser()
-        define_logging_options(self.options)
-        self.logger = logging.Logger("tornado.test.log_test.EnablePrettyLoggingTest")
-        self.logger.propagate = False
-
-    def test_log_file(self):
-        tmpdir = tempfile.mkdtemp()
-        try:
-            self.options.log_file_prefix = tmpdir + "/test_log"
-            enable_pretty_logging(options=self.options, logger=self.logger)
-            self.assertEqual(1, len(self.logger.handlers))
-            self.logger.error("hello")
-            self.logger.handlers[0].flush()
-            filenames = glob.glob(tmpdir + "/test_log*")
-            self.assertEqual(1, len(filenames))
-            with open(filenames[0]) as f:
-                self.assertRegexpMatches(f.read(), r"^\[E [^]]*\] hello$")
-        finally:
-            for handler in self.logger.handlers:
-                handler.flush()
-                handler.close()
-            for filename in glob.glob(tmpdir + "/test_log*"):
-                os.unlink(filename)
-            os.rmdir(tmpdir)
-
-    def test_log_file_with_timed_rotating(self):
-        tmpdir = tempfile.mkdtemp()
-        try:
-            self.options.log_file_prefix = tmpdir + "/test_log"
-            self.options.log_rotate_mode = "time"
-            enable_pretty_logging(options=self.options, logger=self.logger)
-            self.logger.error("hello")
-            self.logger.handlers[0].flush()
-            filenames = glob.glob(tmpdir + "/test_log*")
-            self.assertEqual(1, len(filenames))
-            with open(filenames[0]) as f:
-                self.assertRegexpMatches(f.read(), r"^\[E [^]]*\] hello$")
-        finally:
-            for handler in self.logger.handlers:
-                handler.flush()
-                handler.close()
-            for filename in glob.glob(tmpdir + "/test_log*"):
-                os.unlink(filename)
-            os.rmdir(tmpdir)
-
-    def test_wrong_rotate_mode_value(self):
-        try:
-            self.options.log_file_prefix = "some_path"
-            self.options.log_rotate_mode = "wrong_mode"
-            self.assertRaises(
-                ValueError,
-                enable_pretty_logging,
-                options=self.options,
-                logger=self.logger,
-            )
-        finally:
-            for handler in self.logger.handlers:
-                handler.flush()
-                handler.close()
-
-
-class LoggingOptionTest(unittest.TestCase):
-    """Test the ability to enable and disable Tornado's logging hooks."""
-
-    def logs_present(self, statement, args=None):
-        # Each test may manipulate and/or parse the options and then logs
-        # a line at the 'info' level.  This level is ignored in the
-        # logging module by default, but Tornado turns it on by default
-        # so it is the easiest way to tell whether tornado's logging hooks
-        # ran.
-        IMPORT = "from tornado.options import options, parse_command_line"
-        LOG_INFO = 'import logging; logging.info("hello")'
-        program = ";".join([IMPORT, statement, LOG_INFO])
-        proc = subprocess.Popen(
-            [sys.executable, "-c", program] + (args or []),
-            stdout=subprocess.PIPE,
-            stderr=subprocess.STDOUT,
-        )
-        stdout, stderr = proc.communicate()
-        self.assertEqual(proc.returncode, 0, "process failed: %r" % stdout)
-        return b"hello" in stdout
-
-    def test_default(self):
-        self.assertFalse(self.logs_present("pass"))
-
-    def test_tornado_default(self):
-        self.assertTrue(self.logs_present("parse_command_line()"))
-
-    def test_disable_command_line(self):
-        self.assertFalse(self.logs_present("parse_command_line()", ["--logging=none"]))
-
-    def test_disable_command_line_case_insensitive(self):
-        self.assertFalse(self.logs_present("parse_command_line()", ["--logging=None"]))
-
-    def test_disable_code_string(self):
-        self.assertFalse(
-            self.logs_present('options.logging = "none"; parse_command_line()')
-        )
-
-    def test_disable_code_none(self):
-        self.assertFalse(
-            self.logs_present("options.logging = None; parse_command_line()")
-        )
-
-    def test_disable_override(self):
-        # command line trumps code defaults
-        self.assertTrue(
-            self.logs_present(
-                "options.logging = None; parse_command_line()", ["--logging=info"]
-            )
-        )
diff --git a/venv/lib/python3.7/site-packages/tornado/test/netutil_test.py b/venv/lib/python3.7/site-packages/tornado/test/netutil_test.py
deleted file mode 100644
index 32807e2..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/netutil_test.py
+++ /dev/null
@@ -1,226 +0,0 @@
-import errno
-import os
-import signal
-import socket
-from subprocess import Popen
-import sys
-import time
-import unittest
-
-from tornado.netutil import (
-    BlockingResolver,
-    OverrideResolver,
-    ThreadedResolver,
-    is_valid_ip,
-    bind_sockets,
-)
-from tornado.testing import AsyncTestCase, gen_test, bind_unused_port
-from tornado.test.util import skipIfNoNetwork
-
-import typing
-
-if typing.TYPE_CHECKING:
-    from typing import List  # noqa: F401
-
-try:
-    import pycares  # type: ignore
-except ImportError:
-    pycares = None
-else:
-    from tornado.platform.caresresolver import CaresResolver
-
-try:
-    import twisted  # type: ignore
-    import twisted.names  # type: ignore
-except ImportError:
-    twisted = None
-else:
-    from tornado.platform.twisted import TwistedResolver
-
-
-class _ResolverTestMixin(object):
-    @gen_test
-    def test_localhost(self):
-        addrinfo = yield self.resolver.resolve("localhost", 80, socket.AF_UNSPEC)
-        self.assertIn((socket.AF_INET, ("127.0.0.1", 80)), addrinfo)
-
-
-# It is impossible to quickly and consistently generate an error in name
-# resolution, so test this case separately, using mocks as needed.
-class _ResolverErrorTestMixin(object):
-    @gen_test
-    def test_bad_host(self):
-        with self.assertRaises(IOError):
-            yield self.resolver.resolve("an invalid domain", 80, socket.AF_UNSPEC)
-
-
-def _failing_getaddrinfo(*args):
-    """Dummy implementation of getaddrinfo for use in mocks"""
-    raise socket.gaierror(errno.EIO, "mock: lookup failed")
-
-
-@skipIfNoNetwork
-class BlockingResolverTest(AsyncTestCase, _ResolverTestMixin):
-    def setUp(self):
-        super(BlockingResolverTest, self).setUp()
-        self.resolver = BlockingResolver()
-
-
-# getaddrinfo-based tests need mocking to reliably generate errors;
-# some configurations are slow to produce errors and take longer than
-# our default timeout.
-class BlockingResolverErrorTest(AsyncTestCase, _ResolverErrorTestMixin):
-    def setUp(self):
-        super(BlockingResolverErrorTest, self).setUp()
-        self.resolver = BlockingResolver()
-        self.real_getaddrinfo = socket.getaddrinfo
-        socket.getaddrinfo = _failing_getaddrinfo
-
-    def tearDown(self):
-        socket.getaddrinfo = self.real_getaddrinfo
-        super(BlockingResolverErrorTest, self).tearDown()
-
-
-class OverrideResolverTest(AsyncTestCase, _ResolverTestMixin):
-    def setUp(self):
-        super(OverrideResolverTest, self).setUp()
-        mapping = {
-            ("google.com", 80): ("1.2.3.4", 80),
-            ("google.com", 80, socket.AF_INET): ("1.2.3.4", 80),
-            ("google.com", 80, socket.AF_INET6): (
-                "2a02:6b8:7c:40c:c51e:495f:e23a:3",
-                80,
-            ),
-        }
-        self.resolver = OverrideResolver(BlockingResolver(), mapping)
-
-    @gen_test
-    def test_resolve_multiaddr(self):
-        result = yield self.resolver.resolve("google.com", 80, socket.AF_INET)
-        self.assertIn((socket.AF_INET, ("1.2.3.4", 80)), result)
-
-        result = yield self.resolver.resolve("google.com", 80, socket.AF_INET6)
-        self.assertIn(
-            (socket.AF_INET6, ("2a02:6b8:7c:40c:c51e:495f:e23a:3", 80, 0, 0)), result
-        )
-
-
-@skipIfNoNetwork
-class ThreadedResolverTest(AsyncTestCase, _ResolverTestMixin):
-    def setUp(self):
-        super(ThreadedResolverTest, self).setUp()
-        self.resolver = ThreadedResolver()
-
-    def tearDown(self):
-        self.resolver.close()
-        super(ThreadedResolverTest, self).tearDown()
-
-
-class ThreadedResolverErrorTest(AsyncTestCase, _ResolverErrorTestMixin):
-    def setUp(self):
-        super(ThreadedResolverErrorTest, self).setUp()
-        self.resolver = BlockingResolver()
-        self.real_getaddrinfo = socket.getaddrinfo
-        socket.getaddrinfo = _failing_getaddrinfo
-
-    def tearDown(self):
-        socket.getaddrinfo = self.real_getaddrinfo
-        super(ThreadedResolverErrorTest, self).tearDown()
-
-
-@skipIfNoNetwork
-@unittest.skipIf(sys.platform == "win32", "preexec_fn not available on win32")
-class ThreadedResolverImportTest(unittest.TestCase):
-    def test_import(self):
-        TIMEOUT = 5
-
-        # Test for a deadlock when importing a module that runs the
-        # ThreadedResolver at import-time. See resolve_test.py for
-        # full explanation.
-        command = [sys.executable, "-c", "import tornado.test.resolve_test_helper"]
-
-        start = time.time()
-        popen = Popen(command, preexec_fn=lambda: signal.alarm(TIMEOUT))
-        while time.time() - start < TIMEOUT:
-            return_code = popen.poll()
-            if return_code is not None:
-                self.assertEqual(0, return_code)
-                return  # Success.
-            time.sleep(0.05)
-
-        self.fail("import timed out")
-
-
-# We do not test errors with CaresResolver:
-# Some DNS-hijacking ISPs (e.g. Time Warner) return non-empty results
-# with an NXDOMAIN status code.  Most resolvers treat this as an error;
-# C-ares returns the results, making the "bad_host" tests unreliable.
-# C-ares will try to resolve even malformed names, such as the
-# name with spaces used in this test.
-@skipIfNoNetwork
-@unittest.skipIf(pycares is None, "pycares module not present")
-class CaresResolverTest(AsyncTestCase, _ResolverTestMixin):
-    def setUp(self):
-        super(CaresResolverTest, self).setUp()
-        self.resolver = CaresResolver()
-
-
-# TwistedResolver produces consistent errors in our test cases so we
-# could test the regular and error cases in the same class. However,
-# in the error cases it appears that cleanup of socket objects is
-# handled asynchronously and occasionally results in "unclosed socket"
-# warnings if not given time to shut down (and there is no way to
-# explicitly shut it down). This makes the test flaky, so we do not
-# test error cases here.
-@skipIfNoNetwork
-@unittest.skipIf(twisted is None, "twisted module not present")
-@unittest.skipIf(
-    getattr(twisted, "__version__", "0.0") < "12.1", "old version of twisted"
-)
-class TwistedResolverTest(AsyncTestCase, _ResolverTestMixin):
-    def setUp(self):
-        super(TwistedResolverTest, self).setUp()
-        self.resolver = TwistedResolver()
-
-
-class IsValidIPTest(unittest.TestCase):
-    def test_is_valid_ip(self):
-        self.assertTrue(is_valid_ip("127.0.0.1"))
-        self.assertTrue(is_valid_ip("4.4.4.4"))
-        self.assertTrue(is_valid_ip("::1"))
-        self.assertTrue(is_valid_ip("2620:0:1cfe:face:b00c::3"))
-        self.assertTrue(not is_valid_ip("www.google.com"))
-        self.assertTrue(not is_valid_ip("localhost"))
-        self.assertTrue(not is_valid_ip("4.4.4.4<"))
-        self.assertTrue(not is_valid_ip(" 127.0.0.1"))
-        self.assertTrue(not is_valid_ip(""))
-        self.assertTrue(not is_valid_ip(" "))
-        self.assertTrue(not is_valid_ip("\n"))
-        self.assertTrue(not is_valid_ip("\x00"))
-
-
-class TestPortAllocation(unittest.TestCase):
-    def test_same_port_allocation(self):
-        if "TRAVIS" in os.environ:
-            self.skipTest("dual-stack servers often have port conflicts on travis")
-        sockets = bind_sockets(0, "localhost")
-        try:
-            port = sockets[0].getsockname()[1]
-            self.assertTrue(all(s.getsockname()[1] == port for s in sockets[1:]))
-        finally:
-            for sock in sockets:
-                sock.close()
-
-    @unittest.skipIf(
-        not hasattr(socket, "SO_REUSEPORT"), "SO_REUSEPORT is not supported"
-    )
-    def test_reuse_port(self):
-        sockets = []  # type: List[socket.socket]
-        socket, port = bind_unused_port(reuse_port=True)
-        try:
-            sockets = bind_sockets(port, "127.0.0.1", reuse_port=True)
-            self.assertTrue(all(s.getsockname()[1] == port for s in sockets))
-        finally:
-            socket.close()
-            for sock in sockets:
-                sock.close()
diff --git a/venv/lib/python3.7/site-packages/tornado/test/options_test.cfg b/venv/lib/python3.7/site-packages/tornado/test/options_test.cfg
deleted file mode 100644
index 4ead46a..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/options_test.cfg
+++ /dev/null
@@ -1,7 +0,0 @@
-port=443
-port=443
-username='李康'
-
-foo_bar='a'
-
-my_path = __file__
diff --git a/venv/lib/python3.7/site-packages/tornado/test/options_test.py b/venv/lib/python3.7/site-packages/tornado/test/options_test.py
deleted file mode 100644
index 0759592..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/options_test.py
+++ /dev/null
@@ -1,329 +0,0 @@
-# -*- coding: utf-8 -*-
-import datetime
-from io import StringIO
-import os
-import sys
-from unittest import mock
-import unittest
-
-from tornado.options import OptionParser, Error
-from tornado.util import basestring_type
-from tornado.test.util import subTest
-
-import typing
-
-if typing.TYPE_CHECKING:
-    from typing import List  # noqa: F401
-
-
-class Email(object):
-    def __init__(self, value):
-        if isinstance(value, str) and "@" in value:
-            self._value = value
-        else:
-            raise ValueError()
-
-    @property
-    def value(self):
-        return self._value
-
-
-class OptionsTest(unittest.TestCase):
-    def test_parse_command_line(self):
-        options = OptionParser()
-        options.define("port", default=80)
-        options.parse_command_line(["main.py", "--port=443"])
-        self.assertEqual(options.port, 443)
-
-    def test_parse_config_file(self):
-        options = OptionParser()
-        options.define("port", default=80)
-        options.define("username", default="foo")
-        options.define("my_path")
-        config_path = os.path.join(
-            os.path.dirname(os.path.abspath(__file__)), "options_test.cfg"
-        )
-        options.parse_config_file(config_path)
-        self.assertEqual(options.port, 443)
-        self.assertEqual(options.username, "李康")
-        self.assertEqual(options.my_path, config_path)
-
-    def test_parse_callbacks(self):
-        options = OptionParser()
-        self.called = False
-
-        def callback():
-            self.called = True
-
-        options.add_parse_callback(callback)
-
-        # non-final parse doesn't run callbacks
-        options.parse_command_line(["main.py"], final=False)
-        self.assertFalse(self.called)
-
-        # final parse does
-        options.parse_command_line(["main.py"])
-        self.assertTrue(self.called)
-
-        # callbacks can be run more than once on the same options
-        # object if there are multiple final parses
-        self.called = False
-        options.parse_command_line(["main.py"])
-        self.assertTrue(self.called)
-
-    def test_help(self):
-        options = OptionParser()
-        try:
-            orig_stderr = sys.stderr
-            sys.stderr = StringIO()
-            with self.assertRaises(SystemExit):
-                options.parse_command_line(["main.py", "--help"])
-            usage = sys.stderr.getvalue()
-        finally:
-            sys.stderr = orig_stderr
-        self.assertIn("Usage:", usage)
-
-    def test_subcommand(self):
-        base_options = OptionParser()
-        base_options.define("verbose", default=False)
-        sub_options = OptionParser()
-        sub_options.define("foo", type=str)
-        rest = base_options.parse_command_line(
-            ["main.py", "--verbose", "subcommand", "--foo=bar"]
-        )
-        self.assertEqual(rest, ["subcommand", "--foo=bar"])
-        self.assertTrue(base_options.verbose)
-        rest2 = sub_options.parse_command_line(rest)
-        self.assertEqual(rest2, [])
-        self.assertEqual(sub_options.foo, "bar")
-
-        # the two option sets are distinct
-        try:
-            orig_stderr = sys.stderr
-            sys.stderr = StringIO()
-            with self.assertRaises(Error):
-                sub_options.parse_command_line(["subcommand", "--verbose"])
-        finally:
-            sys.stderr = orig_stderr
-
-    def test_setattr(self):
-        options = OptionParser()
-        options.define("foo", default=1, type=int)
-        options.foo = 2
-        self.assertEqual(options.foo, 2)
-
-    def test_setattr_type_check(self):
-        # setattr requires that options be the right type and doesn't
-        # parse from string formats.
-        options = OptionParser()
-        options.define("foo", default=1, type=int)
-        with self.assertRaises(Error):
-            options.foo = "2"
-
-    def test_setattr_with_callback(self):
-        values = []  # type: List[int]
-        options = OptionParser()
-        options.define("foo", default=1, type=int, callback=values.append)
-        options.foo = 2
-        self.assertEqual(values, [2])
-
-    def _sample_options(self):
-        options = OptionParser()
-        options.define("a", default=1)
-        options.define("b", default=2)
-        return options
-
-    def test_iter(self):
-        options = self._sample_options()
-        # OptionParsers always define 'help'.
-        self.assertEqual(set(["a", "b", "help"]), set(iter(options)))
-
-    def test_getitem(self):
-        options = self._sample_options()
-        self.assertEqual(1, options["a"])
-
-    def test_setitem(self):
-        options = OptionParser()
-        options.define("foo", default=1, type=int)
-        options["foo"] = 2
-        self.assertEqual(options["foo"], 2)
-
-    def test_items(self):
-        options = self._sample_options()
-        # OptionParsers always define 'help'.
-        expected = [("a", 1), ("b", 2), ("help", options.help)]
-        actual = sorted(options.items())
-        self.assertEqual(expected, actual)
-
-    def test_as_dict(self):
-        options = self._sample_options()
-        expected = {"a": 1, "b": 2, "help": options.help}
-        self.assertEqual(expected, options.as_dict())
-
-    def test_group_dict(self):
-        options = OptionParser()
-        options.define("a", default=1)
-        options.define("b", group="b_group", default=2)
-
-        frame = sys._getframe(0)
-        this_file = frame.f_code.co_filename
-        self.assertEqual(set(["b_group", "", this_file]), options.groups())
-
-        b_group_dict = options.group_dict("b_group")
-        self.assertEqual({"b": 2}, b_group_dict)
-
-        self.assertEqual({}, options.group_dict("nonexistent"))
-
-    def test_mock_patch(self):
-        # ensure that our setattr hooks don't interfere with mock.patch
-        options = OptionParser()
-        options.define("foo", default=1)
-        options.parse_command_line(["main.py", "--foo=2"])
-        self.assertEqual(options.foo, 2)
-
-        with mock.patch.object(options.mockable(), "foo", 3):
-            self.assertEqual(options.foo, 3)
-        self.assertEqual(options.foo, 2)
-
-        # Try nested patches mixed with explicit sets
-        with mock.patch.object(options.mockable(), "foo", 4):
-            self.assertEqual(options.foo, 4)
-            options.foo = 5
-            self.assertEqual(options.foo, 5)
-            with mock.patch.object(options.mockable(), "foo", 6):
-                self.assertEqual(options.foo, 6)
-            self.assertEqual(options.foo, 5)
-        self.assertEqual(options.foo, 2)
-
-    def _define_options(self):
-        options = OptionParser()
-        options.define("str", type=str)
-        options.define("basestring", type=basestring_type)
-        options.define("int", type=int)
-        options.define("float", type=float)
-        options.define("datetime", type=datetime.datetime)
-        options.define("timedelta", type=datetime.timedelta)
-        options.define("email", type=Email)
-        options.define("list-of-int", type=int, multiple=True)
-        return options
-
-    def _check_options_values(self, options):
-        self.assertEqual(options.str, "asdf")
-        self.assertEqual(options.basestring, "qwer")
-        self.assertEqual(options.int, 42)
-        self.assertEqual(options.float, 1.5)
-        self.assertEqual(options.datetime, datetime.datetime(2013, 4, 28, 5, 16))
-        self.assertEqual(options.timedelta, datetime.timedelta(seconds=45))
-        self.assertEqual(options.email.value, "tornado@web.com")
-        self.assertTrue(isinstance(options.email, Email))
-        self.assertEqual(options.list_of_int, [1, 2, 3])
-
-    def test_types(self):
-        options = self._define_options()
-        options.parse_command_line(
-            [
-                "main.py",
-                "--str=asdf",
-                "--basestring=qwer",
-                "--int=42",
-                "--float=1.5",
-                "--datetime=2013-04-28 05:16",
-                "--timedelta=45s",
-                "--email=tornado@web.com",
-                "--list-of-int=1,2,3",
-            ]
-        )
-        self._check_options_values(options)
-
-    def test_types_with_conf_file(self):
-        for config_file_name in (
-            "options_test_types.cfg",
-            "options_test_types_str.cfg",
-        ):
-            options = self._define_options()
-            options.parse_config_file(
-                os.path.join(os.path.dirname(__file__), config_file_name)
-            )
-            self._check_options_values(options)
-
-    def test_multiple_string(self):
-        options = OptionParser()
-        options.define("foo", type=str, multiple=True)
-        options.parse_command_line(["main.py", "--foo=a,b,c"])
-        self.assertEqual(options.foo, ["a", "b", "c"])
-
-    def test_multiple_int(self):
-        options = OptionParser()
-        options.define("foo", type=int, multiple=True)
-        options.parse_command_line(["main.py", "--foo=1,3,5:7"])
-        self.assertEqual(options.foo, [1, 3, 5, 6, 7])
-
-    def test_error_redefine(self):
-        options = OptionParser()
-        options.define("foo")
-        with self.assertRaises(Error) as cm:
-            options.define("foo")
-        self.assertRegexpMatches(str(cm.exception), "Option.*foo.*already defined")
-
-    def test_error_redefine_underscore(self):
-        # Ensure that the dash/underscore normalization doesn't
-        # interfere with the redefinition error.
-        tests = [
-            ("foo-bar", "foo-bar"),
-            ("foo_bar", "foo_bar"),
-            ("foo-bar", "foo_bar"),
-            ("foo_bar", "foo-bar"),
-        ]
-        for a, b in tests:
-            with subTest(self, a=a, b=b):
-                options = OptionParser()
-                options.define(a)
-                with self.assertRaises(Error) as cm:
-                    options.define(b)
-                self.assertRegexpMatches(
-                    str(cm.exception), "Option.*foo.bar.*already defined"
-                )
-
-    def test_dash_underscore_cli(self):
-        # Dashes and underscores should be interchangeable.
-        for defined_name in ["foo-bar", "foo_bar"]:
-            for flag in ["--foo-bar=a", "--foo_bar=a"]:
-                options = OptionParser()
-                options.define(defined_name)
-                options.parse_command_line(["main.py", flag])
-                # Attr-style access always uses underscores.
-                self.assertEqual(options.foo_bar, "a")
-                # Dict-style access allows both.
-                self.assertEqual(options["foo-bar"], "a")
-                self.assertEqual(options["foo_bar"], "a")
-
-    def test_dash_underscore_file(self):
-        # No matter how an option was defined, it can be set with underscores
-        # in a config file.
-        for defined_name in ["foo-bar", "foo_bar"]:
-            options = OptionParser()
-            options.define(defined_name)
-            options.parse_config_file(
-                os.path.join(os.path.dirname(__file__), "options_test.cfg")
-            )
-            self.assertEqual(options.foo_bar, "a")
-
-    def test_dash_underscore_introspection(self):
-        # Original names are preserved in introspection APIs.
-        options = OptionParser()
-        options.define("with-dash", group="g")
-        options.define("with_underscore", group="g")
-        all_options = ["help", "with-dash", "with_underscore"]
-        self.assertEqual(sorted(options), all_options)
-        self.assertEqual(sorted(k for (k, v) in options.items()), all_options)
-        self.assertEqual(sorted(options.as_dict().keys()), all_options)
-
-        self.assertEqual(
-            sorted(options.group_dict("g")), ["with-dash", "with_underscore"]
-        )
-
-        # --help shows CLI-style names with dashes.
-        buf = StringIO()
-        options.print_help(buf)
-        self.assertIn("--with-dash", buf.getvalue())
-        self.assertIn("--with-underscore", buf.getvalue())
diff --git a/venv/lib/python3.7/site-packages/tornado/test/options_test_types.cfg b/venv/lib/python3.7/site-packages/tornado/test/options_test_types.cfg
deleted file mode 100644
index e1d53cb..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/options_test_types.cfg
+++ /dev/null
@@ -1,11 +0,0 @@
-from datetime import datetime, timedelta
-from tornado.test.options_test import Email
-
-str = 'asdf'
-basestring = 'qwer'
-int = 42
-float = 1.5
-datetime = datetime(2013, 4, 28, 5, 16)
-timedelta = timedelta(0, 45)
-email = Email('tornado@web.com')
-list_of_int = [1, 2, 3]
diff --git a/venv/lib/python3.7/site-packages/tornado/test/options_test_types_str.cfg b/venv/lib/python3.7/site-packages/tornado/test/options_test_types_str.cfg
deleted file mode 100644
index 25dfbc2..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/options_test_types_str.cfg
+++ /dev/null
@@ -1,8 +0,0 @@
-str = 'asdf'
-basestring = 'qwer'
-int = 42
-float = 1.5
-datetime = '2013-04-28 05:16'
-timedelta = '45s'
-email = 'tornado@web.com'
-list_of_int = '1,2,3'
diff --git a/venv/lib/python3.7/site-packages/tornado/test/process_test.py b/venv/lib/python3.7/site-packages/tornado/test/process_test.py
deleted file mode 100644
index 4f2b1e6..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/process_test.py
+++ /dev/null
@@ -1,265 +0,0 @@
-import asyncio
-import logging
-import os
-import signal
-import subprocess
-import sys
-import unittest
-
-from tornado.httpclient import HTTPClient, HTTPError
-from tornado.httpserver import HTTPServer
-from tornado.ioloop import IOLoop
-from tornado.log import gen_log
-from tornado.process import fork_processes, task_id, Subprocess
-from tornado.simple_httpclient import SimpleAsyncHTTPClient
-from tornado.testing import bind_unused_port, ExpectLog, AsyncTestCase, gen_test
-from tornado.test.util import skipIfNonUnix
-from tornado.web import RequestHandler, Application
-
-
-# Not using AsyncHTTPTestCase because we need control over the IOLoop.
-@skipIfNonUnix
-class ProcessTest(unittest.TestCase):
-    def get_app(self):
-        class ProcessHandler(RequestHandler):
-            def get(self):
-                if self.get_argument("exit", None):
-                    # must use os._exit instead of sys.exit so unittest's
-                    # exception handler doesn't catch it
-                    os._exit(int(self.get_argument("exit")))
-                if self.get_argument("signal", None):
-                    os.kill(os.getpid(), int(self.get_argument("signal")))
-                self.write(str(os.getpid()))
-
-        return Application([("/", ProcessHandler)])
-
-    def tearDown(self):
-        if task_id() is not None:
-            # We're in a child process, and probably got to this point
-            # via an uncaught exception.  If we return now, both
-            # processes will continue with the rest of the test suite.
-            # Exit now so the parent process will restart the child
-            # (since we don't have a clean way to signal failure to
-            # the parent that won't restart)
-            logging.error("aborting child process from tearDown")
-            logging.shutdown()
-            os._exit(1)
-        # In the surviving process, clear the alarm we set earlier
-        signal.alarm(0)
-        super(ProcessTest, self).tearDown()
-
-    def test_multi_process(self):
-        # This test doesn't work on twisted because we use the global
-        # reactor and don't restore it to a sane state after the fork
-        # (asyncio has the same issue, but we have a special case in
-        # place for it).
-        with ExpectLog(
-            gen_log, "(Starting .* processes|child .* exited|uncaught exception)"
-        ):
-            sock, port = bind_unused_port()
-
-            def get_url(path):
-                return "http://127.0.0.1:%d%s" % (port, path)
-
-            # ensure that none of these processes live too long
-            signal.alarm(5)  # master process
-            try:
-                id = fork_processes(3, max_restarts=3)
-                self.assertTrue(id is not None)
-                signal.alarm(5)  # child processes
-            except SystemExit as e:
-                # if we exit cleanly from fork_processes, all the child processes
-                # finished with status 0
-                self.assertEqual(e.code, 0)
-                self.assertTrue(task_id() is None)
-                sock.close()
-                return
-            try:
-                if asyncio is not None:
-                    # Reset the global asyncio event loop, which was put into
-                    # a broken state by the fork.
-                    asyncio.set_event_loop(asyncio.new_event_loop())
-                if id in (0, 1):
-                    self.assertEqual(id, task_id())
-                    server = HTTPServer(self.get_app())
-                    server.add_sockets([sock])
-                    IOLoop.current().start()
-                elif id == 2:
-                    self.assertEqual(id, task_id())
-                    sock.close()
-                    # Always use SimpleAsyncHTTPClient here; the curl
-                    # version appears to get confused sometimes if the
-                    # connection gets closed before it's had a chance to
-                    # switch from writing mode to reading mode.
-                    client = HTTPClient(SimpleAsyncHTTPClient)
-
-                    def fetch(url, fail_ok=False):
-                        try:
-                            return client.fetch(get_url(url))
-                        except HTTPError as e:
-                            if not (fail_ok and e.code == 599):
-                                raise
-
-                    # Make two processes exit abnormally
-                    fetch("/?exit=2", fail_ok=True)
-                    fetch("/?exit=3", fail_ok=True)
-
-                    # They've been restarted, so a new fetch will work
-                    int(fetch("/").body)
-
-                    # Now the same with signals
-                    # Disabled because on the mac a process dying with a signal
-                    # can trigger an "Application exited abnormally; send error
-                    # report to Apple?" prompt.
-                    # fetch("/?signal=%d" % signal.SIGTERM, fail_ok=True)
-                    # fetch("/?signal=%d" % signal.SIGABRT, fail_ok=True)
-                    # int(fetch("/").body)
-
-                    # Now kill them normally so they won't be restarted
-                    fetch("/?exit=0", fail_ok=True)
-                    # One process left; watch it's pid change
-                    pid = int(fetch("/").body)
-                    fetch("/?exit=4", fail_ok=True)
-                    pid2 = int(fetch("/").body)
-                    self.assertNotEqual(pid, pid2)
-
-                    # Kill the last one so we shut down cleanly
-                    fetch("/?exit=0", fail_ok=True)
-
-                    os._exit(0)
-            except Exception:
-                logging.error("exception in child process %d", id, exc_info=True)
-                raise
-
-
-@skipIfNonUnix
-class SubprocessTest(AsyncTestCase):
-    def term_and_wait(self, subproc):
-        subproc.proc.terminate()
-        subproc.proc.wait()
-
-    @gen_test
-    def test_subprocess(self):
-        if IOLoop.configured_class().__name__.endswith("LayeredTwistedIOLoop"):
-            # This test fails non-deterministically with LayeredTwistedIOLoop.
-            # (the read_until('\n') returns '\n' instead of 'hello\n')
-            # This probably indicates a problem with either TornadoReactor
-            # or TwistedIOLoop, but I haven't been able to track it down
-            # and for now this is just causing spurious travis-ci failures.
-            raise unittest.SkipTest(
-                "Subprocess tests not compatible with " "LayeredTwistedIOLoop"
-            )
-        subproc = Subprocess(
-            [sys.executable, "-u", "-i"],
-            stdin=Subprocess.STREAM,
-            stdout=Subprocess.STREAM,
-            stderr=subprocess.STDOUT,
-        )
-        self.addCleanup(lambda: self.term_and_wait(subproc))
-        self.addCleanup(subproc.stdout.close)
-        self.addCleanup(subproc.stdin.close)
-        yield subproc.stdout.read_until(b">>> ")
-        subproc.stdin.write(b"print('hello')\n")
-        data = yield subproc.stdout.read_until(b"\n")
-        self.assertEqual(data, b"hello\n")
-
-        yield subproc.stdout.read_until(b">>> ")
-        subproc.stdin.write(b"raise SystemExit\n")
-        data = yield subproc.stdout.read_until_close()
-        self.assertEqual(data, b"")
-
-    @gen_test
-    def test_close_stdin(self):
-        # Close the parent's stdin handle and see that the child recognizes it.
-        subproc = Subprocess(
-            [sys.executable, "-u", "-i"],
-            stdin=Subprocess.STREAM,
-            stdout=Subprocess.STREAM,
-            stderr=subprocess.STDOUT,
-        )
-        self.addCleanup(lambda: self.term_and_wait(subproc))
-        yield subproc.stdout.read_until(b">>> ")
-        subproc.stdin.close()
-        data = yield subproc.stdout.read_until_close()
-        self.assertEqual(data, b"\n")
-
-    @gen_test
-    def test_stderr(self):
-        # This test is mysteriously flaky on twisted: it succeeds, but logs
-        # an error of EBADF on closing a file descriptor.
-        subproc = Subprocess(
-            [sys.executable, "-u", "-c", r"import sys; sys.stderr.write('hello\n')"],
-            stderr=Subprocess.STREAM,
-        )
-        self.addCleanup(lambda: self.term_and_wait(subproc))
-        data = yield subproc.stderr.read_until(b"\n")
-        self.assertEqual(data, b"hello\n")
-        # More mysterious EBADF: This fails if done with self.addCleanup instead of here.
-        subproc.stderr.close()
-
-    def test_sigchild(self):
-        Subprocess.initialize()
-        self.addCleanup(Subprocess.uninitialize)
-        subproc = Subprocess([sys.executable, "-c", "pass"])
-        subproc.set_exit_callback(self.stop)
-        ret = self.wait()
-        self.assertEqual(ret, 0)
-        self.assertEqual(subproc.returncode, ret)
-
-    @gen_test
-    def test_sigchild_future(self):
-        Subprocess.initialize()
-        self.addCleanup(Subprocess.uninitialize)
-        subproc = Subprocess([sys.executable, "-c", "pass"])
-        ret = yield subproc.wait_for_exit()
-        self.assertEqual(ret, 0)
-        self.assertEqual(subproc.returncode, ret)
-
-    def test_sigchild_signal(self):
-        Subprocess.initialize()
-        self.addCleanup(Subprocess.uninitialize)
-        subproc = Subprocess(
-            [sys.executable, "-c", "import time; time.sleep(30)"],
-            stdout=Subprocess.STREAM,
-        )
-        self.addCleanup(subproc.stdout.close)
-        subproc.set_exit_callback(self.stop)
-        os.kill(subproc.pid, signal.SIGTERM)
-        try:
-            ret = self.wait(timeout=1.0)
-        except AssertionError:
-            # We failed to get the termination signal. This test is
-            # occasionally flaky on pypy, so try to get a little more
-            # information: did the process close its stdout
-            # (indicating that the problem is in the parent process's
-            # signal handling) or did the child process somehow fail
-            # to terminate?
-            fut = subproc.stdout.read_until_close()
-            fut.add_done_callback(lambda f: self.stop())  # type: ignore
-            try:
-                self.wait(timeout=1.0)
-            except AssertionError:
-                raise AssertionError("subprocess failed to terminate")
-            else:
-                raise AssertionError(
-                    "subprocess closed stdout but failed to " "get termination signal"
-                )
-        self.assertEqual(subproc.returncode, ret)
-        self.assertEqual(ret, -signal.SIGTERM)
-
-    @gen_test
-    def test_wait_for_exit_raise(self):
-        Subprocess.initialize()
-        self.addCleanup(Subprocess.uninitialize)
-        subproc = Subprocess([sys.executable, "-c", "import sys; sys.exit(1)"])
-        with self.assertRaises(subprocess.CalledProcessError) as cm:
-            yield subproc.wait_for_exit()
-        self.assertEqual(cm.exception.returncode, 1)
-
-    @gen_test
-    def test_wait_for_exit_raise_disabled(self):
-        Subprocess.initialize()
-        self.addCleanup(Subprocess.uninitialize)
-        subproc = Subprocess([sys.executable, "-c", "import sys; sys.exit(1)"])
-        ret = yield subproc.wait_for_exit(raise_error=False)
-        self.assertEqual(ret, 1)
diff --git a/venv/lib/python3.7/site-packages/tornado/test/queues_test.py b/venv/lib/python3.7/site-packages/tornado/test/queues_test.py
deleted file mode 100644
index 8e527db..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/queues_test.py
+++ /dev/null
@@ -1,427 +0,0 @@
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-import asyncio
-from datetime import timedelta
-from random import random
-import unittest
-
-from tornado import gen, queues
-from tornado.gen import TimeoutError
-from tornado.testing import gen_test, AsyncTestCase
-
-
-class QueueBasicTest(AsyncTestCase):
-    def test_repr_and_str(self):
-        q = queues.Queue(maxsize=1)  # type: queues.Queue[None]
-        self.assertIn(hex(id(q)), repr(q))
-        self.assertNotIn(hex(id(q)), str(q))
-        q.get()
-
-        for q_str in repr(q), str(q):
-            self.assertTrue(q_str.startswith("<Queue"))
-            self.assertIn("maxsize=1", q_str)
-            self.assertIn("getters[1]", q_str)
-            self.assertNotIn("putters", q_str)
-            self.assertNotIn("tasks", q_str)
-
-        q.put(None)
-        q.put(None)
-        # Now the queue is full, this putter blocks.
-        q.put(None)
-
-        for q_str in repr(q), str(q):
-            self.assertNotIn("getters", q_str)
-            self.assertIn("putters[1]", q_str)
-            self.assertIn("tasks=2", q_str)
-
-    def test_order(self):
-        q = queues.Queue()  # type: queues.Queue[int]
-        for i in [1, 3, 2]:
-            q.put_nowait(i)
-
-        items = [q.get_nowait() for _ in range(3)]
-        self.assertEqual([1, 3, 2], items)
-
-    @gen_test
-    def test_maxsize(self):
-        self.assertRaises(TypeError, queues.Queue, maxsize=None)
-        self.assertRaises(ValueError, queues.Queue, maxsize=-1)
-
-        q = queues.Queue(maxsize=2)  # type: queues.Queue[int]
-        self.assertTrue(q.empty())
-        self.assertFalse(q.full())
-        self.assertEqual(2, q.maxsize)
-        self.assertTrue(q.put(0).done())
-        self.assertTrue(q.put(1).done())
-        self.assertFalse(q.empty())
-        self.assertTrue(q.full())
-        put2 = q.put(2)
-        self.assertFalse(put2.done())
-        self.assertEqual(0, (yield q.get()))  # Make room.
-        self.assertTrue(put2.done())
-        self.assertFalse(q.empty())
-        self.assertTrue(q.full())
-
-
-class QueueGetTest(AsyncTestCase):
-    @gen_test
-    def test_blocking_get(self):
-        q = queues.Queue()  # type: queues.Queue[int]
-        q.put_nowait(0)
-        self.assertEqual(0, (yield q.get()))
-
-    def test_nonblocking_get(self):
-        q = queues.Queue()  # type: queues.Queue[int]
-        q.put_nowait(0)
-        self.assertEqual(0, q.get_nowait())
-
-    def test_nonblocking_get_exception(self):
-        q = queues.Queue()  # type: queues.Queue[int]
-        self.assertRaises(queues.QueueEmpty, q.get_nowait)
-
-    @gen_test
-    def test_get_with_putters(self):
-        q = queues.Queue(1)  # type: queues.Queue[int]
-        q.put_nowait(0)
-        put = q.put(1)
-        self.assertEqual(0, (yield q.get()))
-        self.assertIsNone((yield put))
-
-    @gen_test
-    def test_blocking_get_wait(self):
-        q = queues.Queue()  # type: queues.Queue[int]
-        q.put(0)
-        self.io_loop.call_later(0.01, q.put, 1)
-        self.io_loop.call_later(0.02, q.put, 2)
-        self.assertEqual(0, (yield q.get(timeout=timedelta(seconds=1))))
-        self.assertEqual(1, (yield q.get(timeout=timedelta(seconds=1))))
-
-    @gen_test
-    def test_get_timeout(self):
-        q = queues.Queue()  # type: queues.Queue[int]
-        get_timeout = q.get(timeout=timedelta(seconds=0.01))
-        get = q.get()
-        with self.assertRaises(TimeoutError):
-            yield get_timeout
-
-        q.put_nowait(0)
-        self.assertEqual(0, (yield get))
-
-    @gen_test
-    def test_get_timeout_preempted(self):
-        q = queues.Queue()  # type: queues.Queue[int]
-        get = q.get(timeout=timedelta(seconds=0.01))
-        q.put(0)
-        yield gen.sleep(0.02)
-        self.assertEqual(0, (yield get))
-
-    @gen_test
-    def test_get_clears_timed_out_putters(self):
-        q = queues.Queue(1)  # type: queues.Queue[int]
-        # First putter succeeds, remainder block.
-        putters = [q.put(i, timedelta(seconds=0.01)) for i in range(10)]
-        put = q.put(10)
-        self.assertEqual(10, len(q._putters))
-        yield gen.sleep(0.02)
-        self.assertEqual(10, len(q._putters))
-        self.assertFalse(put.done())  # Final waiter is still active.
-        q.put(11)
-        self.assertEqual(0, (yield q.get()))  # get() clears the waiters.
-        self.assertEqual(1, len(q._putters))
-        for putter in putters[1:]:
-            self.assertRaises(TimeoutError, putter.result)
-
-    @gen_test
-    def test_get_clears_timed_out_getters(self):
-        q = queues.Queue()  # type: queues.Queue[int]
-        getters = [
-            asyncio.ensure_future(q.get(timedelta(seconds=0.01))) for _ in range(10)
-        ]
-        get = asyncio.ensure_future(q.get())
-        self.assertEqual(11, len(q._getters))
-        yield gen.sleep(0.02)
-        self.assertEqual(11, len(q._getters))
-        self.assertFalse(get.done())  # Final waiter is still active.
-        q.get()  # get() clears the waiters.
-        self.assertEqual(2, len(q._getters))
-        for getter in getters:
-            self.assertRaises(TimeoutError, getter.result)
-
-    @gen_test
-    def test_async_for(self):
-        q = queues.Queue()  # type: queues.Queue[int]
-        for i in range(5):
-            q.put(i)
-
-        async def f():
-            results = []
-            async for i in q:
-                results.append(i)
-                if i == 4:
-                    return results
-
-        results = yield f()
-        self.assertEqual(results, list(range(5)))
-
-
-class QueuePutTest(AsyncTestCase):
-    @gen_test
-    def test_blocking_put(self):
-        q = queues.Queue()  # type: queues.Queue[int]
-        q.put(0)
-        self.assertEqual(0, q.get_nowait())
-
-    def test_nonblocking_put_exception(self):
-        q = queues.Queue(1)  # type: queues.Queue[int]
-        q.put(0)
-        self.assertRaises(queues.QueueFull, q.put_nowait, 1)
-
-    @gen_test
-    def test_put_with_getters(self):
-        q = queues.Queue()  # type: queues.Queue[int]
-        get0 = q.get()
-        get1 = q.get()
-        yield q.put(0)
-        self.assertEqual(0, (yield get0))
-        yield q.put(1)
-        self.assertEqual(1, (yield get1))
-
-    @gen_test
-    def test_nonblocking_put_with_getters(self):
-        q = queues.Queue()  # type: queues.Queue[int]
-        get0 = q.get()
-        get1 = q.get()
-        q.put_nowait(0)
-        # put_nowait does *not* immediately unblock getters.
-        yield gen.moment
-        self.assertEqual(0, (yield get0))
-        q.put_nowait(1)
-        yield gen.moment
-        self.assertEqual(1, (yield get1))
-
-    @gen_test
-    def test_blocking_put_wait(self):
-        q = queues.Queue(1)  # type: queues.Queue[int]
-        q.put_nowait(0)
-        self.io_loop.call_later(0.01, q.get)
-        self.io_loop.call_later(0.02, q.get)
-        futures = [q.put(0), q.put(1)]
-        self.assertFalse(any(f.done() for f in futures))
-        yield futures
-
-    @gen_test
-    def test_put_timeout(self):
-        q = queues.Queue(1)  # type: queues.Queue[int]
-        q.put_nowait(0)  # Now it's full.
-        put_timeout = q.put(1, timeout=timedelta(seconds=0.01))
-        put = q.put(2)
-        with self.assertRaises(TimeoutError):
-            yield put_timeout
-
-        self.assertEqual(0, q.get_nowait())
-        # 1 was never put in the queue.
-        self.assertEqual(2, (yield q.get()))
-
-        # Final get() unblocked this putter.
-        yield put
-
-    @gen_test
-    def test_put_timeout_preempted(self):
-        q = queues.Queue(1)  # type: queues.Queue[int]
-        q.put_nowait(0)
-        put = q.put(1, timeout=timedelta(seconds=0.01))
-        q.get()
-        yield gen.sleep(0.02)
-        yield put  # No TimeoutError.
-
-    @gen_test
-    def test_put_clears_timed_out_putters(self):
-        q = queues.Queue(1)  # type: queues.Queue[int]
-        # First putter succeeds, remainder block.
-        putters = [q.put(i, timedelta(seconds=0.01)) for i in range(10)]
-        put = q.put(10)
-        self.assertEqual(10, len(q._putters))
-        yield gen.sleep(0.02)
-        self.assertEqual(10, len(q._putters))
-        self.assertFalse(put.done())  # Final waiter is still active.
-        q.put(11)  # put() clears the waiters.
-        self.assertEqual(2, len(q._putters))
-        for putter in putters[1:]:
-            self.assertRaises(TimeoutError, putter.result)
-
-    @gen_test
-    def test_put_clears_timed_out_getters(self):
-        q = queues.Queue()  # type: queues.Queue[int]
-        getters = [
-            asyncio.ensure_future(q.get(timedelta(seconds=0.01))) for _ in range(10)
-        ]
-        get = asyncio.ensure_future(q.get())
-        q.get()
-        self.assertEqual(12, len(q._getters))
-        yield gen.sleep(0.02)
-        self.assertEqual(12, len(q._getters))
-        self.assertFalse(get.done())  # Final waiters still active.
-        q.put(0)  # put() clears the waiters.
-        self.assertEqual(1, len(q._getters))
-        self.assertEqual(0, (yield get))
-        for getter in getters:
-            self.assertRaises(TimeoutError, getter.result)
-
-    @gen_test
-    def test_float_maxsize(self):
-        # If a float is passed for maxsize, a reasonable limit should
-        # be enforced, instead of being treated as unlimited.
-        # It happens to be rounded up.
-        # http://bugs.python.org/issue21723
-        q = queues.Queue(maxsize=1.3)  # type: ignore
-        self.assertTrue(q.empty())
-        self.assertFalse(q.full())
-        q.put_nowait(0)
-        q.put_nowait(1)
-        self.assertFalse(q.empty())
-        self.assertTrue(q.full())
-        self.assertRaises(queues.QueueFull, q.put_nowait, 2)
-        self.assertEqual(0, q.get_nowait())
-        self.assertFalse(q.empty())
-        self.assertFalse(q.full())
-
-        yield q.put(2)
-        put = q.put(3)
-        self.assertFalse(put.done())
-        self.assertEqual(1, (yield q.get()))
-        yield put
-        self.assertTrue(q.full())
-
-
-class QueueJoinTest(AsyncTestCase):
-    queue_class = queues.Queue
-
-    def test_task_done_underflow(self):
-        q = self.queue_class()
-        self.assertRaises(ValueError, q.task_done)
-
-    @gen_test
-    def test_task_done(self):
-        q = self.queue_class()
-        for i in range(100):
-            q.put_nowait(i)
-
-        self.accumulator = 0
-
-        @gen.coroutine
-        def worker():
-            while True:
-                item = yield q.get()
-                self.accumulator += item
-                q.task_done()
-                yield gen.sleep(random() * 0.01)
-
-        # Two coroutines share work.
-        worker()
-        worker()
-        yield q.join()
-        self.assertEqual(sum(range(100)), self.accumulator)
-
-    @gen_test
-    def test_task_done_delay(self):
-        # Verify it is task_done(), not get(), that unblocks join().
-        q = self.queue_class()
-        q.put_nowait(0)
-        join = q.join()
-        self.assertFalse(join.done())
-        yield q.get()
-        self.assertFalse(join.done())
-        yield gen.moment
-        self.assertFalse(join.done())
-        q.task_done()
-        self.assertTrue(join.done())
-
-    @gen_test
-    def test_join_empty_queue(self):
-        q = self.queue_class()
-        yield q.join()
-        yield q.join()
-
-    @gen_test
-    def test_join_timeout(self):
-        q = self.queue_class()
-        q.put(0)
-        with self.assertRaises(TimeoutError):
-            yield q.join(timeout=timedelta(seconds=0.01))
-
-
-class PriorityQueueJoinTest(QueueJoinTest):
-    queue_class = queues.PriorityQueue
-
-    @gen_test
-    def test_order(self):
-        q = self.queue_class(maxsize=2)
-        q.put_nowait((1, "a"))
-        q.put_nowait((0, "b"))
-        self.assertTrue(q.full())
-        q.put((3, "c"))
-        q.put((2, "d"))
-        self.assertEqual((0, "b"), q.get_nowait())
-        self.assertEqual((1, "a"), (yield q.get()))
-        self.assertEqual((2, "d"), q.get_nowait())
-        self.assertEqual((3, "c"), (yield q.get()))
-        self.assertTrue(q.empty())
-
-
-class LifoQueueJoinTest(QueueJoinTest):
-    queue_class = queues.LifoQueue
-
-    @gen_test
-    def test_order(self):
-        q = self.queue_class(maxsize=2)
-        q.put_nowait(1)
-        q.put_nowait(0)
-        self.assertTrue(q.full())
-        q.put(3)
-        q.put(2)
-        self.assertEqual(3, q.get_nowait())
-        self.assertEqual(2, (yield q.get()))
-        self.assertEqual(0, q.get_nowait())
-        self.assertEqual(1, (yield q.get()))
-        self.assertTrue(q.empty())
-
-
-class ProducerConsumerTest(AsyncTestCase):
-    @gen_test
-    def test_producer_consumer(self):
-        q = queues.Queue(maxsize=3)  # type: queues.Queue[int]
-        history = []
-
-        # We don't yield between get() and task_done(), so get() must wait for
-        # the next tick. Otherwise we'd immediately call task_done and unblock
-        # join() before q.put() resumes, and we'd only process the first four
-        # items.
-        @gen.coroutine
-        def consumer():
-            while True:
-                history.append((yield q.get()))
-                q.task_done()
-
-        @gen.coroutine
-        def producer():
-            for item in range(10):
-                yield q.put(item)
-
-        consumer()
-        yield producer()
-        yield q.join()
-        self.assertEqual(list(range(10)), history)
-
-
-if __name__ == "__main__":
-    unittest.main()
diff --git a/venv/lib/python3.7/site-packages/tornado/test/resolve_test_helper.py b/venv/lib/python3.7/site-packages/tornado/test/resolve_test_helper.py
deleted file mode 100644
index 491737f..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/resolve_test_helper.py
+++ /dev/null
@@ -1,10 +0,0 @@
-from tornado.ioloop import IOLoop
-from tornado.netutil import ThreadedResolver
-
-# When this module is imported, it runs getaddrinfo on a thread. Since
-# the hostname is unicode, getaddrinfo attempts to import encodings.idna
-# but blocks on the import lock. Verify that ThreadedResolver avoids
-# this deadlock.
-
-resolver = ThreadedResolver()
-IOLoop.current().run_sync(lambda: resolver.resolve(u"localhost", 80))
diff --git a/venv/lib/python3.7/site-packages/tornado/test/routing_test.py b/venv/lib/python3.7/site-packages/tornado/test/routing_test.py
deleted file mode 100644
index fc75d23..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/routing_test.py
+++ /dev/null
@@ -1,276 +0,0 @@
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-from tornado.httputil import (
-    HTTPHeaders,
-    HTTPMessageDelegate,
-    HTTPServerConnectionDelegate,
-    ResponseStartLine,
-)
-from tornado.routing import (
-    HostMatches,
-    PathMatches,
-    ReversibleRouter,
-    Router,
-    Rule,
-    RuleRouter,
-)
-from tornado.testing import AsyncHTTPTestCase
-from tornado.web import Application, HTTPError, RequestHandler
-from tornado.wsgi import WSGIContainer
-
-import typing  # noqa: F401
-
-
-class BasicRouter(Router):
-    def find_handler(self, request, **kwargs):
-        class MessageDelegate(HTTPMessageDelegate):
-            def __init__(self, connection):
-                self.connection = connection
-
-            def finish(self):
-                self.connection.write_headers(
-                    ResponseStartLine("HTTP/1.1", 200, "OK"),
-                    HTTPHeaders({"Content-Length": "2"}),
-                    b"OK",
-                )
-                self.connection.finish()
-
-        return MessageDelegate(request.connection)
-
-
-class BasicRouterTestCase(AsyncHTTPTestCase):
-    def get_app(self):
-        return BasicRouter()
-
-    def test_basic_router(self):
-        response = self.fetch("/any_request")
-        self.assertEqual(response.body, b"OK")
-
-
-resources = {}  # type: typing.Dict[str, bytes]
-
-
-class GetResource(RequestHandler):
-    def get(self, path):
-        if path not in resources:
-            raise HTTPError(404)
-
-        self.finish(resources[path])
-
-
-class PostResource(RequestHandler):
-    def post(self, path):
-        resources[path] = self.request.body
-
-
-class HTTPMethodRouter(Router):
-    def __init__(self, app):
-        self.app = app
-
-    def find_handler(self, request, **kwargs):
-        handler = GetResource if request.method == "GET" else PostResource
-        return self.app.get_handler_delegate(request, handler, path_args=[request.path])
-
-
-class HTTPMethodRouterTestCase(AsyncHTTPTestCase):
-    def get_app(self):
-        return HTTPMethodRouter(Application())
-
-    def test_http_method_router(self):
-        response = self.fetch("/post_resource", method="POST", body="data")
-        self.assertEqual(response.code, 200)
-
-        response = self.fetch("/get_resource")
-        self.assertEqual(response.code, 404)
-
-        response = self.fetch("/post_resource")
-        self.assertEqual(response.code, 200)
-        self.assertEqual(response.body, b"data")
-
-
-def _get_named_handler(handler_name):
-    class Handler(RequestHandler):
-        def get(self, *args, **kwargs):
-            if self.application.settings.get("app_name") is not None:
-                self.write(self.application.settings["app_name"] + ": ")
-
-            self.finish(handler_name + ": " + self.reverse_url(handler_name))
-
-    return Handler
-
-
-FirstHandler = _get_named_handler("first_handler")
-SecondHandler = _get_named_handler("second_handler")
-
-
-class CustomRouter(ReversibleRouter):
-    def __init__(self):
-        super(CustomRouter, self).__init__()
-        self.routes = {}  # type: typing.Dict[str, typing.Any]
-
-    def add_routes(self, routes):
-        self.routes.update(routes)
-
-    def find_handler(self, request, **kwargs):
-        if request.path in self.routes:
-            app, handler = self.routes[request.path]
-            return app.get_handler_delegate(request, handler)
-
-    def reverse_url(self, name, *args):
-        handler_path = "/" + name
-        return handler_path if handler_path in self.routes else None
-
-
-class CustomRouterTestCase(AsyncHTTPTestCase):
-    def get_app(self):
-        router = CustomRouter()
-
-        class CustomApplication(Application):
-            def reverse_url(self, name, *args):
-                return router.reverse_url(name, *args)
-
-        app1 = CustomApplication(app_name="app1")
-        app2 = CustomApplication(app_name="app2")
-
-        router.add_routes(
-            {
-                "/first_handler": (app1, FirstHandler),
-                "/second_handler": (app2, SecondHandler),
-                "/first_handler_second_app": (app2, FirstHandler),
-            }
-        )
-
-        return router
-
-    def test_custom_router(self):
-        response = self.fetch("/first_handler")
-        self.assertEqual(response.body, b"app1: first_handler: /first_handler")
-        response = self.fetch("/second_handler")
-        self.assertEqual(response.body, b"app2: second_handler: /second_handler")
-        response = self.fetch("/first_handler_second_app")
-        self.assertEqual(response.body, b"app2: first_handler: /first_handler")
-
-
-class ConnectionDelegate(HTTPServerConnectionDelegate):
-    def start_request(self, server_conn, request_conn):
-        class MessageDelegate(HTTPMessageDelegate):
-            def __init__(self, connection):
-                self.connection = connection
-
-            def finish(self):
-                response_body = b"OK"
-                self.connection.write_headers(
-                    ResponseStartLine("HTTP/1.1", 200, "OK"),
-                    HTTPHeaders({"Content-Length": str(len(response_body))}),
-                )
-                self.connection.write(response_body)
-                self.connection.finish()
-
-        return MessageDelegate(request_conn)
-
-
-class RuleRouterTest(AsyncHTTPTestCase):
-    def get_app(self):
-        app = Application()
-
-        def request_callable(request):
-            request.connection.write_headers(
-                ResponseStartLine("HTTP/1.1", 200, "OK"),
-                HTTPHeaders({"Content-Length": "2"}),
-            )
-            request.connection.write(b"OK")
-            request.connection.finish()
-
-        router = CustomRouter()
-        router.add_routes(
-            {"/nested_handler": (app, _get_named_handler("nested_handler"))}
-        )
-
-        app.add_handlers(
-            ".*",
-            [
-                (
-                    HostMatches("www.example.com"),
-                    [
-                        (
-                            PathMatches("/first_handler"),
-                            "tornado.test.routing_test.SecondHandler",
-                            {},
-                            "second_handler",
-                        )
-                    ],
-                ),
-                Rule(PathMatches("/.*handler"), router),
-                Rule(PathMatches("/first_handler"), FirstHandler, name="first_handler"),
-                Rule(PathMatches("/request_callable"), request_callable),
-                ("/connection_delegate", ConnectionDelegate()),
-            ],
-        )
-
-        return app
-
-    def test_rule_based_router(self):
-        response = self.fetch("/first_handler")
-        self.assertEqual(response.body, b"first_handler: /first_handler")
-
-        response = self.fetch("/first_handler", headers={"Host": "www.example.com"})
-        self.assertEqual(response.body, b"second_handler: /first_handler")
-
-        response = self.fetch("/nested_handler")
-        self.assertEqual(response.body, b"nested_handler: /nested_handler")
-
-        response = self.fetch("/nested_not_found_handler")
-        self.assertEqual(response.code, 404)
-
-        response = self.fetch("/connection_delegate")
-        self.assertEqual(response.body, b"OK")
-
-        response = self.fetch("/request_callable")
-        self.assertEqual(response.body, b"OK")
-
-        response = self.fetch("/404")
-        self.assertEqual(response.code, 404)
-
-
-class WSGIContainerTestCase(AsyncHTTPTestCase):
-    def get_app(self):
-        wsgi_app = WSGIContainer(self.wsgi_app)
-
-        class Handler(RequestHandler):
-            def get(self, *args, **kwargs):
-                self.finish(self.reverse_url("tornado"))
-
-        return RuleRouter(
-            [
-                (
-                    PathMatches("/tornado.*"),
-                    Application([(r"/tornado/test", Handler, {}, "tornado")]),
-                ),
-                (PathMatches("/wsgi"), wsgi_app),
-            ]
-        )
-
-    def wsgi_app(self, environ, start_response):
-        start_response("200 OK", [])
-        return [b"WSGI"]
-
-    def test_wsgi_container(self):
-        response = self.fetch("/tornado/test")
-        self.assertEqual(response.body, b"/tornado/test")
-
-        response = self.fetch("/wsgi")
-        self.assertEqual(response.body, b"WSGI")
-
-    def test_delegate_not_found(self):
-        response = self.fetch("/404")
-        self.assertEqual(response.code, 404)
diff --git a/venv/lib/python3.7/site-packages/tornado/test/runtests.py b/venv/lib/python3.7/site-packages/tornado/test/runtests.py
deleted file mode 100644
index 44cbacd..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/runtests.py
+++ /dev/null
@@ -1,236 +0,0 @@
-from functools import reduce
-import gc
-import io
-import locale  # system locale module, not tornado.locale
-import logging
-import operator
-import textwrap
-import sys
-import unittest
-import warnings
-
-from tornado.httpclient import AsyncHTTPClient
-from tornado.httpserver import HTTPServer
-from tornado.netutil import Resolver
-from tornado.options import define, add_parse_callback
-
-
-TEST_MODULES = [
-    "tornado.httputil.doctests",
-    "tornado.iostream.doctests",
-    "tornado.util.doctests",
-    "tornado.test.asyncio_test",
-    "tornado.test.auth_test",
-    "tornado.test.autoreload_test",
-    "tornado.test.concurrent_test",
-    "tornado.test.curl_httpclient_test",
-    "tornado.test.escape_test",
-    "tornado.test.gen_test",
-    "tornado.test.http1connection_test",
-    "tornado.test.httpclient_test",
-    "tornado.test.httpserver_test",
-    "tornado.test.httputil_test",
-    "tornado.test.import_test",
-    "tornado.test.ioloop_test",
-    "tornado.test.iostream_test",
-    "tornado.test.locale_test",
-    "tornado.test.locks_test",
-    "tornado.test.netutil_test",
-    "tornado.test.log_test",
-    "tornado.test.options_test",
-    "tornado.test.process_test",
-    "tornado.test.queues_test",
-    "tornado.test.routing_test",
-    "tornado.test.simple_httpclient_test",
-    "tornado.test.tcpclient_test",
-    "tornado.test.tcpserver_test",
-    "tornado.test.template_test",
-    "tornado.test.testing_test",
-    "tornado.test.twisted_test",
-    "tornado.test.util_test",
-    "tornado.test.web_test",
-    "tornado.test.websocket_test",
-    "tornado.test.windows_test",
-    "tornado.test.wsgi_test",
-]
-
-
-def all():
-    return unittest.defaultTestLoader.loadTestsFromNames(TEST_MODULES)
-
-
-def test_runner_factory(stderr):
-    class TornadoTextTestRunner(unittest.TextTestRunner):
-        def __init__(self, *args, **kwargs):
-            kwargs["stream"] = stderr
-            super(TornadoTextTestRunner, self).__init__(*args, **kwargs)
-
-        def run(self, test):
-            result = super(TornadoTextTestRunner, self).run(test)
-            if result.skipped:
-                skip_reasons = set(reason for (test, reason) in result.skipped)
-                self.stream.write(
-                    textwrap.fill(
-                        "Some tests were skipped because: %s"
-                        % ", ".join(sorted(skip_reasons))
-                    )
-                )
-                self.stream.write("\n")
-            return result
-
-    return TornadoTextTestRunner
-
-
-class LogCounter(logging.Filter):
-    """Counts the number of WARNING or higher log records."""
-
-    def __init__(self, *args, **kwargs):
-        super(LogCounter, self).__init__(*args, **kwargs)
-        self.info_count = self.warning_count = self.error_count = 0
-
-    def filter(self, record):
-        if record.levelno >= logging.ERROR:
-            self.error_count += 1
-        elif record.levelno >= logging.WARNING:
-            self.warning_count += 1
-        elif record.levelno >= logging.INFO:
-            self.info_count += 1
-        return True
-
-
-class CountingStderr(io.IOBase):
-    def __init__(self, real):
-        self.real = real
-        self.byte_count = 0
-
-    def write(self, data):
-        self.byte_count += len(data)
-        return self.real.write(data)
-
-    def flush(self):
-        return self.real.flush()
-
-
-def main():
-    # Be strict about most warnings (This is set in our test running
-    # scripts to catch import-time warnings, but set it again here to
-    # be sure). This also turns on warnings that are ignored by
-    # default, including DeprecationWarnings and python 3.2's
-    # ResourceWarnings.
-    warnings.filterwarnings("error")
-    # setuptools sometimes gives ImportWarnings about things that are on
-    # sys.path even if they're not being used.
-    warnings.filterwarnings("ignore", category=ImportWarning)
-    # Tornado generally shouldn't use anything deprecated, but some of
-    # our dependencies do (last match wins).
-    warnings.filterwarnings("ignore", category=DeprecationWarning)
-    warnings.filterwarnings("error", category=DeprecationWarning, module=r"tornado\..*")
-    warnings.filterwarnings("ignore", category=PendingDeprecationWarning)
-    warnings.filterwarnings(
-        "error", category=PendingDeprecationWarning, module=r"tornado\..*"
-    )
-    # The unittest module is aggressive about deprecating redundant methods,
-    # leaving some without non-deprecated spellings that work on both
-    # 2.7 and 3.2
-    warnings.filterwarnings(
-        "ignore", category=DeprecationWarning, message="Please use assert.* instead"
-    )
-    warnings.filterwarnings(
-        "ignore",
-        category=PendingDeprecationWarning,
-        message="Please use assert.* instead",
-    )
-    # Twisted 15.0.0 triggers some warnings on py3 with -bb.
-    warnings.filterwarnings("ignore", category=BytesWarning, module=r"twisted\..*")
-    if (3,) < sys.version_info < (3, 6):
-        # Prior to 3.6, async ResourceWarnings were rather noisy
-        # and even
-        # `python3.4 -W error -c 'import asyncio; asyncio.get_event_loop()'`
-        # would generate a warning.
-        warnings.filterwarnings(
-            "ignore", category=ResourceWarning, module=r"asyncio\..*"
-        )
-    # This deprecation warning is introduced in Python 3.8 and is
-    # triggered by pycurl. Unforunately, because it is raised in the C
-    # layer it can't be filtered by module and we must match the
-    # message text instead (Tornado's C module uses PY_SSIZE_T_CLEAN
-    # so it's not at risk of running into this issue).
-    warnings.filterwarnings(
-        "ignore",
-        category=DeprecationWarning,
-        message="PY_SSIZE_T_CLEAN will be required",
-    )
-
-    logging.getLogger("tornado.access").setLevel(logging.CRITICAL)
-
-    define(
-        "httpclient",
-        type=str,
-        default=None,
-        callback=lambda s: AsyncHTTPClient.configure(
-            s, defaults=dict(allow_ipv6=False)
-        ),
-    )
-    define("httpserver", type=str, default=None, callback=HTTPServer.configure)
-    define("resolver", type=str, default=None, callback=Resolver.configure)
-    define(
-        "debug_gc",
-        type=str,
-        multiple=True,
-        help="A comma-separated list of gc module debug constants, "
-        "e.g. DEBUG_STATS or DEBUG_COLLECTABLE,DEBUG_OBJECTS",
-        callback=lambda values: gc.set_debug(
-            reduce(operator.or_, (getattr(gc, v) for v in values))
-        ),
-    )
-
-    def set_locale(x):
-        locale.setlocale(locale.LC_ALL, x)
-
-    define("locale", type=str, default=None, callback=set_locale)
-
-    log_counter = LogCounter()
-    add_parse_callback(lambda: logging.getLogger().handlers[0].addFilter(log_counter))
-
-    # Certain errors (especially "unclosed resource" errors raised in
-    # destructors) go directly to stderr instead of logging. Count
-    # anything written by anything but the test runner as an error.
-    orig_stderr = sys.stderr
-    counting_stderr = CountingStderr(orig_stderr)
-    sys.stderr = counting_stderr  # type: ignore
-
-    import tornado.testing
-
-    kwargs = {}
-
-    # HACK:  unittest.main will make its own changes to the warning
-    # configuration, which may conflict with the settings above
-    # or command-line flags like -bb.  Passing warnings=False
-    # suppresses this behavior, although this looks like an implementation
-    # detail.  http://bugs.python.org/issue15626
-    kwargs["warnings"] = False
-
-    kwargs["testRunner"] = test_runner_factory(orig_stderr)
-    try:
-        tornado.testing.main(**kwargs)
-    finally:
-        # The tests should run clean; consider it a failure if they
-        # logged anything at info level or above.
-        if (
-            log_counter.info_count > 0
-            or log_counter.warning_count > 0
-            or log_counter.error_count > 0
-            or counting_stderr.byte_count > 0
-        ):
-            logging.error(
-                "logged %d infos, %d warnings, %d errors, and %d bytes to stderr",
-                log_counter.info_count,
-                log_counter.warning_count,
-                log_counter.error_count,
-                counting_stderr.byte_count,
-            )
-            sys.exit(1)
-
-
-if __name__ == "__main__":
-    main()
diff --git a/venv/lib/python3.7/site-packages/tornado/test/simple_httpclient_test.py b/venv/lib/python3.7/site-packages/tornado/test/simple_httpclient_test.py
deleted file mode 100644
index 956f7af..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/simple_httpclient_test.py
+++ /dev/null
@@ -1,832 +0,0 @@
-import collections
-from contextlib import closing
-import errno
-import gzip
-import logging
-import os
-import re
-import socket
-import ssl
-import sys
-import typing  # noqa: F401
-
-from tornado.escape import to_unicode, utf8
-from tornado import gen
-from tornado.httpclient import AsyncHTTPClient
-from tornado.httputil import HTTPHeaders, ResponseStartLine
-from tornado.ioloop import IOLoop
-from tornado.iostream import UnsatisfiableReadError
-from tornado.locks import Event
-from tornado.log import gen_log
-from tornado.netutil import Resolver, bind_sockets
-from tornado.simple_httpclient import (
-    SimpleAsyncHTTPClient,
-    HTTPStreamClosedError,
-    HTTPTimeoutError,
-)
-from tornado.test.httpclient_test import (
-    ChunkHandler,
-    CountdownHandler,
-    HelloWorldHandler,
-    RedirectHandler,
-)
-from tornado.test import httpclient_test
-from tornado.testing import (
-    AsyncHTTPTestCase,
-    AsyncHTTPSTestCase,
-    AsyncTestCase,
-    ExpectLog,
-    gen_test,
-)
-from tornado.test.util import skipOnTravis, skipIfNoIPv6, refusing_port
-from tornado.web import RequestHandler, Application, url, stream_request_body
-
-
-class SimpleHTTPClientCommonTestCase(httpclient_test.HTTPClientCommonTestCase):
-    def get_http_client(self):
-        client = SimpleAsyncHTTPClient(force_instance=True)
-        self.assertTrue(isinstance(client, SimpleAsyncHTTPClient))
-        return client
-
-
-class TriggerHandler(RequestHandler):
-    def initialize(self, queue, wake_callback):
-        self.queue = queue
-        self.wake_callback = wake_callback
-
-    @gen.coroutine
-    def get(self):
-        logging.debug("queuing trigger")
-        event = Event()
-        self.queue.append(event.set)
-        if self.get_argument("wake", "true") == "true":
-            self.wake_callback()
-        yield event.wait()
-
-
-class ContentLengthHandler(RequestHandler):
-    def get(self):
-        self.stream = self.detach()
-        IOLoop.current().spawn_callback(self.write_response)
-
-    @gen.coroutine
-    def write_response(self):
-        yield self.stream.write(
-            utf8(
-                "HTTP/1.0 200 OK\r\nContent-Length: %s\r\n\r\nok"
-                % self.get_argument("value")
-            )
-        )
-        self.stream.close()
-
-
-class HeadHandler(RequestHandler):
-    def head(self):
-        self.set_header("Content-Length", "7")
-
-
-class OptionsHandler(RequestHandler):
-    def options(self):
-        self.set_header("Access-Control-Allow-Origin", "*")
-        self.write("ok")
-
-
-class NoContentHandler(RequestHandler):
-    def get(self):
-        self.set_status(204)
-        self.finish()
-
-
-class SeeOtherPostHandler(RequestHandler):
-    def post(self):
-        redirect_code = int(self.request.body)
-        assert redirect_code in (302, 303), "unexpected body %r" % self.request.body
-        self.set_header("Location", "/see_other_get")
-        self.set_status(redirect_code)
-
-
-class SeeOtherGetHandler(RequestHandler):
-    def get(self):
-        if self.request.body:
-            raise Exception("unexpected body %r" % self.request.body)
-        self.write("ok")
-
-
-class HostEchoHandler(RequestHandler):
-    def get(self):
-        self.write(self.request.headers["Host"])
-
-
-class NoContentLengthHandler(RequestHandler):
-    def get(self):
-        if self.request.version.startswith("HTTP/1"):
-            # Emulate the old HTTP/1.0 behavior of returning a body with no
-            # content-length.  Tornado handles content-length at the framework
-            # level so we have to go around it.
-            stream = self.detach()
-            stream.write(b"HTTP/1.0 200 OK\r\n\r\n" b"hello")
-            stream.close()
-        else:
-            self.finish("HTTP/1 required")
-
-
-class EchoPostHandler(RequestHandler):
-    def post(self):
-        self.write(self.request.body)
-
-
-@stream_request_body
-class RespondInPrepareHandler(RequestHandler):
-    def prepare(self):
-        self.set_status(403)
-        self.finish("forbidden")
-
-
-class SimpleHTTPClientTestMixin(object):
-    def get_app(self):
-        # callable objects to finish pending /trigger requests
-        self.triggers = collections.deque()  # type: typing.Deque[str]
-        return Application(
-            [
-                url(
-                    "/trigger",
-                    TriggerHandler,
-                    dict(queue=self.triggers, wake_callback=self.stop),
-                ),
-                url("/chunk", ChunkHandler),
-                url("/countdown/([0-9]+)", CountdownHandler, name="countdown"),
-                url("/hello", HelloWorldHandler),
-                url("/content_length", ContentLengthHandler),
-                url("/head", HeadHandler),
-                url("/options", OptionsHandler),
-                url("/no_content", NoContentHandler),
-                url("/see_other_post", SeeOtherPostHandler),
-                url("/see_other_get", SeeOtherGetHandler),
-                url("/host_echo", HostEchoHandler),
-                url("/no_content_length", NoContentLengthHandler),
-                url("/echo_post", EchoPostHandler),
-                url("/respond_in_prepare", RespondInPrepareHandler),
-                url("/redirect", RedirectHandler),
-            ],
-            gzip=True,
-        )
-
-    def test_singleton(self):
-        # Class "constructor" reuses objects on the same IOLoop
-        self.assertTrue(SimpleAsyncHTTPClient() is SimpleAsyncHTTPClient())
-        # unless force_instance is used
-        self.assertTrue(
-            SimpleAsyncHTTPClient() is not SimpleAsyncHTTPClient(force_instance=True)
-        )
-        # different IOLoops use different objects
-        with closing(IOLoop()) as io_loop2:
-
-            async def make_client():
-                await gen.sleep(0)
-                return SimpleAsyncHTTPClient()
-
-            client1 = self.io_loop.run_sync(make_client)
-            client2 = io_loop2.run_sync(make_client)
-            self.assertTrue(client1 is not client2)
-
-    def test_connection_limit(self):
-        with closing(self.create_client(max_clients=2)) as client:
-            self.assertEqual(client.max_clients, 2)
-            seen = []
-            # Send 4 requests.  Two can be sent immediately, while the others
-            # will be queued
-            for i in range(4):
-
-                def cb(fut, i=i):
-                    seen.append(i)
-                    self.stop()
-
-                client.fetch(self.get_url("/trigger")).add_done_callback(cb)
-            self.wait(condition=lambda: len(self.triggers) == 2)
-            self.assertEqual(len(client.queue), 2)
-
-            # Finish the first two requests and let the next two through
-            self.triggers.popleft()()
-            self.triggers.popleft()()
-            self.wait(condition=lambda: (len(self.triggers) == 2 and len(seen) == 2))
-            self.assertEqual(set(seen), set([0, 1]))
-            self.assertEqual(len(client.queue), 0)
-
-            # Finish all the pending requests
-            self.triggers.popleft()()
-            self.triggers.popleft()()
-            self.wait(condition=lambda: len(seen) == 4)
-            self.assertEqual(set(seen), set([0, 1, 2, 3]))
-            self.assertEqual(len(self.triggers), 0)
-
-    @gen_test
-    def test_redirect_connection_limit(self):
-        # following redirects should not consume additional connections
-        with closing(self.create_client(max_clients=1)) as client:
-            response = yield client.fetch(self.get_url("/countdown/3"), max_redirects=3)
-            response.rethrow()
-
-    def test_gzip(self):
-        # All the tests in this file should be using gzip, but this test
-        # ensures that it is in fact getting compressed.
-        # Setting Accept-Encoding manually bypasses the client's
-        # decompression so we can see the raw data.
-        response = self.fetch(
-            "/chunk", use_gzip=False, headers={"Accept-Encoding": "gzip"}
-        )
-        self.assertEqual(response.headers["Content-Encoding"], "gzip")
-        self.assertNotEqual(response.body, b"asdfqwer")
-        # Our test data gets bigger when gzipped.  Oops.  :)
-        # Chunked encoding bypasses the MIN_LENGTH check.
-        self.assertEqual(len(response.body), 34)
-        f = gzip.GzipFile(mode="r", fileobj=response.buffer)
-        self.assertEqual(f.read(), b"asdfqwer")
-
-    def test_max_redirects(self):
-        response = self.fetch("/countdown/5", max_redirects=3)
-        self.assertEqual(302, response.code)
-        # We requested 5, followed three redirects for 4, 3, 2, then the last
-        # unfollowed redirect is to 1.
-        self.assertTrue(response.request.url.endswith("/countdown/5"))
-        self.assertTrue(response.effective_url.endswith("/countdown/2"))
-        self.assertTrue(response.headers["Location"].endswith("/countdown/1"))
-
-    def test_header_reuse(self):
-        # Apps may reuse a headers object if they are only passing in constant
-        # headers like user-agent.  The header object should not be modified.
-        headers = HTTPHeaders({"User-Agent": "Foo"})
-        self.fetch("/hello", headers=headers)
-        self.assertEqual(list(headers.get_all()), [("User-Agent", "Foo")])
-
-    def test_see_other_redirect(self):
-        for code in (302, 303):
-            response = self.fetch("/see_other_post", method="POST", body="%d" % code)
-            self.assertEqual(200, response.code)
-            self.assertTrue(response.request.url.endswith("/see_other_post"))
-            self.assertTrue(response.effective_url.endswith("/see_other_get"))
-            # request is the original request, is a POST still
-            self.assertEqual("POST", response.request.method)
-
-    @skipOnTravis
-    @gen_test
-    def test_connect_timeout(self):
-        timeout = 0.1
-
-        cleanup_event = Event()
-        test = self
-
-        class TimeoutResolver(Resolver):
-            async def resolve(self, *args, **kwargs):
-                await cleanup_event.wait()
-                # Return something valid so the test doesn't raise during shutdown.
-                return [(socket.AF_INET, ("127.0.0.1", test.get_http_port()))]
-
-        with closing(self.create_client(resolver=TimeoutResolver())) as client:
-            with self.assertRaises(HTTPTimeoutError):
-                yield client.fetch(
-                    self.get_url("/hello"),
-                    connect_timeout=timeout,
-                    request_timeout=3600,
-                    raise_error=True,
-                )
-
-        # Let the hanging coroutine clean up after itself. We need to
-        # wait more than a single IOLoop iteration for the SSL case,
-        # which logs errors on unexpected EOF.
-        cleanup_event.set()
-        yield gen.sleep(0.2)
-
-    @skipOnTravis
-    def test_request_timeout(self):
-        timeout = 0.1
-        if os.name == "nt":
-            timeout = 0.5
-
-        with self.assertRaises(HTTPTimeoutError):
-            self.fetch("/trigger?wake=false", request_timeout=timeout, raise_error=True)
-        # trigger the hanging request to let it clean up after itself
-        self.triggers.popleft()()
-        self.io_loop.run_sync(lambda: gen.sleep(0))
-
-    @skipIfNoIPv6
-    def test_ipv6(self):
-        [sock] = bind_sockets(0, "::1", family=socket.AF_INET6)
-        port = sock.getsockname()[1]
-        self.http_server.add_socket(sock)
-        url = "%s://[::1]:%d/hello" % (self.get_protocol(), port)
-
-        # ipv6 is currently enabled by default but can be disabled
-        with self.assertRaises(Exception):
-            self.fetch(url, allow_ipv6=False, raise_error=True)
-
-        response = self.fetch(url)
-        self.assertEqual(response.body, b"Hello world!")
-
-    def test_multiple_content_length_accepted(self):
-        response = self.fetch("/content_length?value=2,2")
-        self.assertEqual(response.body, b"ok")
-        response = self.fetch("/content_length?value=2,%202,2")
-        self.assertEqual(response.body, b"ok")
-
-        with ExpectLog(gen_log, ".*Multiple unequal Content-Lengths"):
-            with self.assertRaises(HTTPStreamClosedError):
-                self.fetch("/content_length?value=2,4", raise_error=True)
-            with self.assertRaises(HTTPStreamClosedError):
-                self.fetch("/content_length?value=2,%202,3", raise_error=True)
-
-    def test_head_request(self):
-        response = self.fetch("/head", method="HEAD")
-        self.assertEqual(response.code, 200)
-        self.assertEqual(response.headers["content-length"], "7")
-        self.assertFalse(response.body)
-
-    def test_options_request(self):
-        response = self.fetch("/options", method="OPTIONS")
-        self.assertEqual(response.code, 200)
-        self.assertEqual(response.headers["content-length"], "2")
-        self.assertEqual(response.headers["access-control-allow-origin"], "*")
-        self.assertEqual(response.body, b"ok")
-
-    def test_no_content(self):
-        response = self.fetch("/no_content")
-        self.assertEqual(response.code, 204)
-        # 204 status shouldn't have a content-length
-        #
-        # Tests with a content-length header are included below
-        # in HTTP204NoContentTestCase.
-        self.assertNotIn("Content-Length", response.headers)
-
-    def test_host_header(self):
-        host_re = re.compile(b"^127.0.0.1:[0-9]+$")
-        response = self.fetch("/host_echo")
-        self.assertTrue(host_re.match(response.body))
-
-        url = self.get_url("/host_echo").replace("http://", "http://me:secret@")
-        response = self.fetch(url)
-        self.assertTrue(host_re.match(response.body), response.body)
-
-    def test_connection_refused(self):
-        cleanup_func, port = refusing_port()
-        self.addCleanup(cleanup_func)
-        with ExpectLog(gen_log, ".*", required=False):
-            with self.assertRaises(socket.error) as cm:
-                self.fetch("http://127.0.0.1:%d/" % port, raise_error=True)
-
-        if sys.platform != "cygwin":
-            # cygwin returns EPERM instead of ECONNREFUSED here
-            contains_errno = str(errno.ECONNREFUSED) in str(cm.exception)
-            if not contains_errno and hasattr(errno, "WSAECONNREFUSED"):
-                contains_errno = str(errno.WSAECONNREFUSED) in str(  # type: ignore
-                    cm.exception
-                )
-            self.assertTrue(contains_errno, cm.exception)
-            # This is usually "Connection refused".
-            # On windows, strerror is broken and returns "Unknown error".
-            expected_message = os.strerror(errno.ECONNREFUSED)
-            self.assertTrue(expected_message in str(cm.exception), cm.exception)
-
-    def test_queue_timeout(self):
-        with closing(self.create_client(max_clients=1)) as client:
-            # Wait for the trigger request to block, not complete.
-            fut1 = client.fetch(self.get_url("/trigger"), request_timeout=10)
-            self.wait()
-            with self.assertRaises(HTTPTimeoutError) as cm:
-                self.io_loop.run_sync(
-                    lambda: client.fetch(
-                        self.get_url("/hello"), connect_timeout=0.1, raise_error=True
-                    )
-                )
-
-            self.assertEqual(str(cm.exception), "Timeout in request queue")
-            self.triggers.popleft()()
-            self.io_loop.run_sync(lambda: fut1)
-
-    def test_no_content_length(self):
-        response = self.fetch("/no_content_length")
-        if response.body == b"HTTP/1 required":
-            self.skipTest("requires HTTP/1.x")
-        else:
-            self.assertEquals(b"hello", response.body)
-
-    def sync_body_producer(self, write):
-        write(b"1234")
-        write(b"5678")
-
-    @gen.coroutine
-    def async_body_producer(self, write):
-        yield write(b"1234")
-        yield gen.moment
-        yield write(b"5678")
-
-    def test_sync_body_producer_chunked(self):
-        response = self.fetch(
-            "/echo_post", method="POST", body_producer=self.sync_body_producer
-        )
-        response.rethrow()
-        self.assertEqual(response.body, b"12345678")
-
-    def test_sync_body_producer_content_length(self):
-        response = self.fetch(
-            "/echo_post",
-            method="POST",
-            body_producer=self.sync_body_producer,
-            headers={"Content-Length": "8"},
-        )
-        response.rethrow()
-        self.assertEqual(response.body, b"12345678")
-
-    def test_async_body_producer_chunked(self):
-        response = self.fetch(
-            "/echo_post", method="POST", body_producer=self.async_body_producer
-        )
-        response.rethrow()
-        self.assertEqual(response.body, b"12345678")
-
-    def test_async_body_producer_content_length(self):
-        response = self.fetch(
-            "/echo_post",
-            method="POST",
-            body_producer=self.async_body_producer,
-            headers={"Content-Length": "8"},
-        )
-        response.rethrow()
-        self.assertEqual(response.body, b"12345678")
-
-    def test_native_body_producer_chunked(self):
-        async def body_producer(write):
-            await write(b"1234")
-            import asyncio
-
-            await asyncio.sleep(0)
-            await write(b"5678")
-
-        response = self.fetch("/echo_post", method="POST", body_producer=body_producer)
-        response.rethrow()
-        self.assertEqual(response.body, b"12345678")
-
-    def test_native_body_producer_content_length(self):
-        async def body_producer(write):
-            await write(b"1234")
-            import asyncio
-
-            await asyncio.sleep(0)
-            await write(b"5678")
-
-        response = self.fetch(
-            "/echo_post",
-            method="POST",
-            body_producer=body_producer,
-            headers={"Content-Length": "8"},
-        )
-        response.rethrow()
-        self.assertEqual(response.body, b"12345678")
-
-    def test_100_continue(self):
-        response = self.fetch(
-            "/echo_post", method="POST", body=b"1234", expect_100_continue=True
-        )
-        self.assertEqual(response.body, b"1234")
-
-    def test_100_continue_early_response(self):
-        def body_producer(write):
-            raise Exception("should not be called")
-
-        response = self.fetch(
-            "/respond_in_prepare",
-            method="POST",
-            body_producer=body_producer,
-            expect_100_continue=True,
-        )
-        self.assertEqual(response.code, 403)
-
-    def test_streaming_follow_redirects(self):
-        # When following redirects, header and streaming callbacks
-        # should only be called for the final result.
-        # TODO(bdarnell): this test belongs in httpclient_test instead of
-        # simple_httpclient_test, but it fails with the version of libcurl
-        # available on travis-ci. Move it when that has been upgraded
-        # or we have a better framework to skip tests based on curl version.
-        headers = []  # type: typing.List[str]
-        chunk_bytes = []  # type: typing.List[bytes]
-        self.fetch(
-            "/redirect?url=/hello",
-            header_callback=headers.append,
-            streaming_callback=chunk_bytes.append,
-        )
-        chunks = list(map(to_unicode, chunk_bytes))
-        self.assertEqual(chunks, ["Hello world!"])
-        # Make sure we only got one set of headers.
-        num_start_lines = len([h for h in headers if h.startswith("HTTP/")])
-        self.assertEqual(num_start_lines, 1)
-
-
-class SimpleHTTPClientTestCase(SimpleHTTPClientTestMixin, AsyncHTTPTestCase):
-    def setUp(self):
-        super(SimpleHTTPClientTestCase, self).setUp()
-        self.http_client = self.create_client()
-
-    def create_client(self, **kwargs):
-        return SimpleAsyncHTTPClient(force_instance=True, **kwargs)
-
-
-class SimpleHTTPSClientTestCase(SimpleHTTPClientTestMixin, AsyncHTTPSTestCase):
-    def setUp(self):
-        super(SimpleHTTPSClientTestCase, self).setUp()
-        self.http_client = self.create_client()
-
-    def create_client(self, **kwargs):
-        return SimpleAsyncHTTPClient(
-            force_instance=True, defaults=dict(validate_cert=False), **kwargs
-        )
-
-    def test_ssl_options(self):
-        resp = self.fetch("/hello", ssl_options={})
-        self.assertEqual(resp.body, b"Hello world!")
-
-    def test_ssl_context(self):
-        resp = self.fetch("/hello", ssl_options=ssl.SSLContext(ssl.PROTOCOL_SSLv23))
-        self.assertEqual(resp.body, b"Hello world!")
-
-    def test_ssl_options_handshake_fail(self):
-        with ExpectLog(gen_log, "SSL Error|Uncaught exception", required=False):
-            with self.assertRaises(ssl.SSLError):
-                self.fetch(
-                    "/hello",
-                    ssl_options=dict(cert_reqs=ssl.CERT_REQUIRED),
-                    raise_error=True,
-                )
-
-    def test_ssl_context_handshake_fail(self):
-        with ExpectLog(gen_log, "SSL Error|Uncaught exception"):
-            ctx = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
-            ctx.verify_mode = ssl.CERT_REQUIRED
-            with self.assertRaises(ssl.SSLError):
-                self.fetch("/hello", ssl_options=ctx, raise_error=True)
-
-    def test_error_logging(self):
-        # No stack traces are logged for SSL errors (in this case,
-        # failure to validate the testing self-signed cert).
-        # The SSLError is exposed through ssl.SSLError.
-        with ExpectLog(gen_log, ".*") as expect_log:
-            with self.assertRaises(ssl.SSLError):
-                self.fetch("/", validate_cert=True, raise_error=True)
-        self.assertFalse(expect_log.logged_stack)
-
-
-class CreateAsyncHTTPClientTestCase(AsyncTestCase):
-    def setUp(self):
-        super(CreateAsyncHTTPClientTestCase, self).setUp()
-        self.saved = AsyncHTTPClient._save_configuration()
-
-    def tearDown(self):
-        AsyncHTTPClient._restore_configuration(self.saved)
-        super(CreateAsyncHTTPClientTestCase, self).tearDown()
-
-    def test_max_clients(self):
-        AsyncHTTPClient.configure(SimpleAsyncHTTPClient)
-        with closing(AsyncHTTPClient(force_instance=True)) as client:
-            self.assertEqual(client.max_clients, 10)  # type: ignore
-        with closing(AsyncHTTPClient(max_clients=11, force_instance=True)) as client:
-            self.assertEqual(client.max_clients, 11)  # type: ignore
-
-        # Now configure max_clients statically and try overriding it
-        # with each way max_clients can be passed
-        AsyncHTTPClient.configure(SimpleAsyncHTTPClient, max_clients=12)
-        with closing(AsyncHTTPClient(force_instance=True)) as client:
-            self.assertEqual(client.max_clients, 12)  # type: ignore
-        with closing(AsyncHTTPClient(max_clients=13, force_instance=True)) as client:
-            self.assertEqual(client.max_clients, 13)  # type: ignore
-        with closing(AsyncHTTPClient(max_clients=14, force_instance=True)) as client:
-            self.assertEqual(client.max_clients, 14)  # type: ignore
-
-
-class HTTP100ContinueTestCase(AsyncHTTPTestCase):
-    def respond_100(self, request):
-        self.http1 = request.version.startswith("HTTP/1.")
-        if not self.http1:
-            request.connection.write_headers(
-                ResponseStartLine("", 200, "OK"), HTTPHeaders()
-            )
-            request.connection.finish()
-            return
-        self.request = request
-        fut = self.request.connection.stream.write(b"HTTP/1.1 100 CONTINUE\r\n\r\n")
-        fut.add_done_callback(self.respond_200)
-
-    def respond_200(self, fut):
-        fut.result()
-        fut = self.request.connection.stream.write(
-            b"HTTP/1.1 200 OK\r\nContent-Length: 1\r\n\r\nA"
-        )
-        fut.add_done_callback(lambda f: self.request.connection.stream.close())
-
-    def get_app(self):
-        # Not a full Application, but works as an HTTPServer callback
-        return self.respond_100
-
-    def test_100_continue(self):
-        res = self.fetch("/")
-        if not self.http1:
-            self.skipTest("requires HTTP/1.x")
-        self.assertEqual(res.body, b"A")
-
-
-class HTTP204NoContentTestCase(AsyncHTTPTestCase):
-    def respond_204(self, request):
-        self.http1 = request.version.startswith("HTTP/1.")
-        if not self.http1:
-            # Close the request cleanly in HTTP/2; it will be skipped anyway.
-            request.connection.write_headers(
-                ResponseStartLine("", 200, "OK"), HTTPHeaders()
-            )
-            request.connection.finish()
-            return
-
-        # A 204 response never has a body, even if doesn't have a content-length
-        # (which would otherwise mean read-until-close).  We simulate here a
-        # server that sends no content length and does not close the connection.
-        #
-        # Tests of a 204 response with no Content-Length header are included
-        # in SimpleHTTPClientTestMixin.
-        stream = request.connection.detach()
-        stream.write(b"HTTP/1.1 204 No content\r\n")
-        if request.arguments.get("error", [False])[-1]:
-            stream.write(b"Content-Length: 5\r\n")
-        else:
-            stream.write(b"Content-Length: 0\r\n")
-        stream.write(b"\r\n")
-        stream.close()
-
-    def get_app(self):
-        return self.respond_204
-
-    def test_204_no_content(self):
-        resp = self.fetch("/")
-        if not self.http1:
-            self.skipTest("requires HTTP/1.x")
-        self.assertEqual(resp.code, 204)
-        self.assertEqual(resp.body, b"")
-
-    def test_204_invalid_content_length(self):
-        # 204 status with non-zero content length is malformed
-        with ExpectLog(gen_log, ".*Response with code 204 should not have body"):
-            with self.assertRaises(HTTPStreamClosedError):
-                self.fetch("/?error=1", raise_error=True)
-                if not self.http1:
-                    self.skipTest("requires HTTP/1.x")
-                if self.http_client.configured_class != SimpleAsyncHTTPClient:
-                    self.skipTest("curl client accepts invalid headers")
-
-
-class HostnameMappingTestCase(AsyncHTTPTestCase):
-    def setUp(self):
-        super(HostnameMappingTestCase, self).setUp()
-        self.http_client = SimpleAsyncHTTPClient(
-            hostname_mapping={
-                "www.example.com": "127.0.0.1",
-                ("foo.example.com", 8000): ("127.0.0.1", self.get_http_port()),
-            }
-        )
-
-    def get_app(self):
-        return Application([url("/hello", HelloWorldHandler)])
-
-    def test_hostname_mapping(self):
-        response = self.fetch("http://www.example.com:%d/hello" % self.get_http_port())
-        response.rethrow()
-        self.assertEqual(response.body, b"Hello world!")
-
-    def test_port_mapping(self):
-        response = self.fetch("http://foo.example.com:8000/hello")
-        response.rethrow()
-        self.assertEqual(response.body, b"Hello world!")
-
-
-class ResolveTimeoutTestCase(AsyncHTTPTestCase):
-    def setUp(self):
-        self.cleanup_event = Event()
-        test = self
-
-        # Dummy Resolver subclass that never finishes.
-        class BadResolver(Resolver):
-            @gen.coroutine
-            def resolve(self, *args, **kwargs):
-                yield test.cleanup_event.wait()
-                # Return something valid so the test doesn't raise during cleanup.
-                return [(socket.AF_INET, ("127.0.0.1", test.get_http_port()))]
-
-        super(ResolveTimeoutTestCase, self).setUp()
-        self.http_client = SimpleAsyncHTTPClient(resolver=BadResolver())
-
-    def get_app(self):
-        return Application([url("/hello", HelloWorldHandler)])
-
-    def test_resolve_timeout(self):
-        with self.assertRaises(HTTPTimeoutError):
-            self.fetch("/hello", connect_timeout=0.1, raise_error=True)
-
-        # Let the hanging coroutine clean up after itself
-        self.cleanup_event.set()
-        self.io_loop.run_sync(lambda: gen.sleep(0))
-
-
-class MaxHeaderSizeTest(AsyncHTTPTestCase):
-    def get_app(self):
-        class SmallHeaders(RequestHandler):
-            def get(self):
-                self.set_header("X-Filler", "a" * 100)
-                self.write("ok")
-
-        class LargeHeaders(RequestHandler):
-            def get(self):
-                self.set_header("X-Filler", "a" * 1000)
-                self.write("ok")
-
-        return Application([("/small", SmallHeaders), ("/large", LargeHeaders)])
-
-    def get_http_client(self):
-        return SimpleAsyncHTTPClient(max_header_size=1024)
-
-    def test_small_headers(self):
-        response = self.fetch("/small")
-        response.rethrow()
-        self.assertEqual(response.body, b"ok")
-
-    def test_large_headers(self):
-        with ExpectLog(gen_log, "Unsatisfiable read"):
-            with self.assertRaises(UnsatisfiableReadError):
-                self.fetch("/large", raise_error=True)
-
-
-class MaxBodySizeTest(AsyncHTTPTestCase):
-    def get_app(self):
-        class SmallBody(RequestHandler):
-            def get(self):
-                self.write("a" * 1024 * 64)
-
-        class LargeBody(RequestHandler):
-            def get(self):
-                self.write("a" * 1024 * 100)
-
-        return Application([("/small", SmallBody), ("/large", LargeBody)])
-
-    def get_http_client(self):
-        return SimpleAsyncHTTPClient(max_body_size=1024 * 64)
-
-    def test_small_body(self):
-        response = self.fetch("/small")
-        response.rethrow()
-        self.assertEqual(response.body, b"a" * 1024 * 64)
-
-    def test_large_body(self):
-        with ExpectLog(
-            gen_log, "Malformed HTTP message from None: Content-Length too long"
-        ):
-            with self.assertRaises(HTTPStreamClosedError):
-                self.fetch("/large", raise_error=True)
-
-
-class MaxBufferSizeTest(AsyncHTTPTestCase):
-    def get_app(self):
-        class LargeBody(RequestHandler):
-            def get(self):
-                self.write("a" * 1024 * 100)
-
-        return Application([("/large", LargeBody)])
-
-    def get_http_client(self):
-        # 100KB body with 64KB buffer
-        return SimpleAsyncHTTPClient(
-            max_body_size=1024 * 100, max_buffer_size=1024 * 64
-        )
-
-    def test_large_body(self):
-        response = self.fetch("/large")
-        response.rethrow()
-        self.assertEqual(response.body, b"a" * 1024 * 100)
-
-
-class ChunkedWithContentLengthTest(AsyncHTTPTestCase):
-    def get_app(self):
-        class ChunkedWithContentLength(RequestHandler):
-            def get(self):
-                # Add an invalid Transfer-Encoding to the response
-                self.set_header("Transfer-Encoding", "chunked")
-                self.write("Hello world")
-
-        return Application([("/chunkwithcl", ChunkedWithContentLength)])
-
-    def get_http_client(self):
-        return SimpleAsyncHTTPClient()
-
-    def test_chunked_with_content_length(self):
-        # Make sure the invalid headers are detected
-        with ExpectLog(
-            gen_log,
-            (
-                "Malformed HTTP message from None: Response "
-                "with both Transfer-Encoding and Content-Length"
-            ),
-        ):
-            with self.assertRaises(HTTPStreamClosedError):
-                self.fetch("/chunkwithcl", raise_error=True)
diff --git a/venv/lib/python3.7/site-packages/tornado/test/static/dir/index.html b/venv/lib/python3.7/site-packages/tornado/test/static/dir/index.html
deleted file mode 100644
index e1cd9d8..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/static/dir/index.html
+++ /dev/null
@@ -1 +0,0 @@
-this is the index
diff --git a/venv/lib/python3.7/site-packages/tornado/test/static/robots.txt b/venv/lib/python3.7/site-packages/tornado/test/static/robots.txt
deleted file mode 100644
index 1f53798..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/static/robots.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-User-agent: *
-Disallow: /
diff --git a/venv/lib/python3.7/site-packages/tornado/test/static/sample.xml b/venv/lib/python3.7/site-packages/tornado/test/static/sample.xml
deleted file mode 100644
index 35ea0e2..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/static/sample.xml
+++ /dev/null
@@ -1,23 +0,0 @@
-<?xml version="1.0"?>
-<data>
-    <country name="Liechtenstein">
-        <rank>1</rank>
-        <year>2008</year>
-        <gdppc>141100</gdppc>
-        <neighbor name="Austria" direction="E"/>
-        <neighbor name="Switzerland" direction="W"/>
-    </country>
-    <country name="Singapore">
-        <rank>4</rank>
-        <year>2011</year>
-        <gdppc>59900</gdppc>
-        <neighbor name="Malaysia" direction="N"/>
-    </country>
-    <country name="Panama">
-        <rank>68</rank>
-        <year>2011</year>
-        <gdppc>13600</gdppc>
-        <neighbor name="Costa Rica" direction="W"/>
-        <neighbor name="Colombia" direction="E"/>
-    </country>
-</data>
diff --git a/venv/lib/python3.7/site-packages/tornado/test/static/sample.xml.bz2 b/venv/lib/python3.7/site-packages/tornado/test/static/sample.xml.bz2
deleted file mode 100644
index 44dc663..0000000
Binary files a/venv/lib/python3.7/site-packages/tornado/test/static/sample.xml.bz2 and /dev/null differ
diff --git a/venv/lib/python3.7/site-packages/tornado/test/static/sample.xml.gz b/venv/lib/python3.7/site-packages/tornado/test/static/sample.xml.gz
deleted file mode 100644
index c0fd5e6..0000000
Binary files a/venv/lib/python3.7/site-packages/tornado/test/static/sample.xml.gz and /dev/null differ
diff --git a/venv/lib/python3.7/site-packages/tornado/test/static_foo.txt b/venv/lib/python3.7/site-packages/tornado/test/static_foo.txt
deleted file mode 100644
index bdb44f3..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/static_foo.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-This file should not be served by StaticFileHandler even though
-its name starts with "static".
diff --git a/venv/lib/python3.7/site-packages/tornado/test/tcpclient_test.py b/venv/lib/python3.7/site-packages/tornado/test/tcpclient_test.py
deleted file mode 100644
index bd08f08..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/tcpclient_test.py
+++ /dev/null
@@ -1,435 +0,0 @@
-#
-# Copyright 2014 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-from contextlib import closing
-import os
-import socket
-import unittest
-
-from tornado.concurrent import Future
-from tornado.netutil import bind_sockets, Resolver
-from tornado.queues import Queue
-from tornado.tcpclient import TCPClient, _Connector
-from tornado.tcpserver import TCPServer
-from tornado.testing import AsyncTestCase, gen_test
-from tornado.test.util import skipIfNoIPv6, refusing_port, skipIfNonUnix
-from tornado.gen import TimeoutError
-
-import typing
-
-if typing.TYPE_CHECKING:
-    from tornado.iostream import IOStream  # noqa: F401
-    from typing import List, Dict, Tuple  # noqa: F401
-
-# Fake address families for testing.  Used in place of AF_INET
-# and AF_INET6 because some installations do not have AF_INET6.
-AF1, AF2 = 1, 2
-
-
-class TestTCPServer(TCPServer):
-    def __init__(self, family):
-        super(TestTCPServer, self).__init__()
-        self.streams = []  # type: List[IOStream]
-        self.queue = Queue()  # type: Queue[IOStream]
-        sockets = bind_sockets(0, "localhost", family)
-        self.add_sockets(sockets)
-        self.port = sockets[0].getsockname()[1]
-
-    def handle_stream(self, stream, address):
-        self.streams.append(stream)
-        self.queue.put(stream)
-
-    def stop(self):
-        super(TestTCPServer, self).stop()
-        for stream in self.streams:
-            stream.close()
-
-
-class TCPClientTest(AsyncTestCase):
-    def setUp(self):
-        super(TCPClientTest, self).setUp()
-        self.server = None
-        self.client = TCPClient()
-
-    def start_server(self, family):
-        if family == socket.AF_UNSPEC and "TRAVIS" in os.environ:
-            self.skipTest("dual-stack servers often have port conflicts on travis")
-        self.server = TestTCPServer(family)
-        return self.server.port
-
-    def stop_server(self):
-        if self.server is not None:
-            self.server.stop()
-            self.server = None
-
-    def tearDown(self):
-        self.client.close()
-        self.stop_server()
-        super(TCPClientTest, self).tearDown()
-
-    def skipIfLocalhostV4(self):
-        # The port used here doesn't matter, but some systems require it
-        # to be non-zero if we do not also pass AI_PASSIVE.
-        addrinfo = self.io_loop.run_sync(lambda: Resolver().resolve("localhost", 80))
-        families = set(addr[0] for addr in addrinfo)
-        if socket.AF_INET6 not in families:
-            self.skipTest("localhost does not resolve to ipv6")
-
-    @gen_test
-    def do_test_connect(self, family, host, source_ip=None, source_port=None):
-        port = self.start_server(family)
-        stream = yield self.client.connect(
-            host, port, source_ip=source_ip, source_port=source_port
-        )
-        server_stream = yield self.server.queue.get()
-        with closing(stream):
-            stream.write(b"hello")
-            data = yield server_stream.read_bytes(5)
-            self.assertEqual(data, b"hello")
-
-    def test_connect_ipv4_ipv4(self):
-        self.do_test_connect(socket.AF_INET, "127.0.0.1")
-
-    def test_connect_ipv4_dual(self):
-        self.do_test_connect(socket.AF_INET, "localhost")
-
-    @skipIfNoIPv6
-    def test_connect_ipv6_ipv6(self):
-        self.skipIfLocalhostV4()
-        self.do_test_connect(socket.AF_INET6, "::1")
-
-    @skipIfNoIPv6
-    def test_connect_ipv6_dual(self):
-        self.skipIfLocalhostV4()
-        if Resolver.configured_class().__name__.endswith("TwistedResolver"):
-            self.skipTest("TwistedResolver does not support multiple addresses")
-        self.do_test_connect(socket.AF_INET6, "localhost")
-
-    def test_connect_unspec_ipv4(self):
-        self.do_test_connect(socket.AF_UNSPEC, "127.0.0.1")
-
-    @skipIfNoIPv6
-    def test_connect_unspec_ipv6(self):
-        self.skipIfLocalhostV4()
-        self.do_test_connect(socket.AF_UNSPEC, "::1")
-
-    def test_connect_unspec_dual(self):
-        self.do_test_connect(socket.AF_UNSPEC, "localhost")
-
-    @gen_test
-    def test_refused_ipv4(self):
-        cleanup_func, port = refusing_port()
-        self.addCleanup(cleanup_func)
-        with self.assertRaises(IOError):
-            yield self.client.connect("127.0.0.1", port)
-
-    def test_source_ip_fail(self):
-        """
-        Fail when trying to use the source IP Address '8.8.8.8'.
-        """
-        self.assertRaises(
-            socket.error,
-            self.do_test_connect,
-            socket.AF_INET,
-            "127.0.0.1",
-            source_ip="8.8.8.8",
-        )
-
-    def test_source_ip_success(self):
-        """
-        Success when trying to use the source IP Address '127.0.0.1'
-        """
-        self.do_test_connect(socket.AF_INET, "127.0.0.1", source_ip="127.0.0.1")
-
-    @skipIfNonUnix
-    def test_source_port_fail(self):
-        """
-        Fail when trying to use source port 1.
-        """
-        self.assertRaises(
-            socket.error,
-            self.do_test_connect,
-            socket.AF_INET,
-            "127.0.0.1",
-            source_port=1,
-        )
-
-    @gen_test
-    def test_connect_timeout(self):
-        timeout = 0.05
-
-        class TimeoutResolver(Resolver):
-            def resolve(self, *args, **kwargs):
-                return Future()  # never completes
-
-        with self.assertRaises(TimeoutError):
-            yield TCPClient(resolver=TimeoutResolver()).connect(
-                "1.2.3.4", 12345, timeout=timeout
-            )
-
-
-class TestConnectorSplit(unittest.TestCase):
-    def test_one_family(self):
-        # These addresses aren't in the right format, but split doesn't care.
-        primary, secondary = _Connector.split([(AF1, "a"), (AF1, "b")])
-        self.assertEqual(primary, [(AF1, "a"), (AF1, "b")])
-        self.assertEqual(secondary, [])
-
-    def test_mixed(self):
-        primary, secondary = _Connector.split(
-            [(AF1, "a"), (AF2, "b"), (AF1, "c"), (AF2, "d")]
-        )
-        self.assertEqual(primary, [(AF1, "a"), (AF1, "c")])
-        self.assertEqual(secondary, [(AF2, "b"), (AF2, "d")])
-
-
-class ConnectorTest(AsyncTestCase):
-    class FakeStream(object):
-        def __init__(self):
-            self.closed = False
-
-        def close(self):
-            self.closed = True
-
-    def setUp(self):
-        super(ConnectorTest, self).setUp()
-        self.connect_futures = (
-            {}
-        )  # type: Dict[Tuple[int, Tuple], Future[ConnectorTest.FakeStream]]
-        self.streams = {}  # type: Dict[Tuple, ConnectorTest.FakeStream]
-        self.addrinfo = [(AF1, "a"), (AF1, "b"), (AF2, "c"), (AF2, "d")]
-
-    def tearDown(self):
-        # Unless explicitly checked (and popped) in the test, we shouldn't
-        # be closing any streams
-        for stream in self.streams.values():
-            self.assertFalse(stream.closed)
-        super(ConnectorTest, self).tearDown()
-
-    def create_stream(self, af, addr):
-        stream = ConnectorTest.FakeStream()
-        self.streams[addr] = stream
-        future = Future()  # type: Future[ConnectorTest.FakeStream]
-        self.connect_futures[(af, addr)] = future
-        return stream, future
-
-    def assert_pending(self, *keys):
-        self.assertEqual(sorted(self.connect_futures.keys()), sorted(keys))
-
-    def resolve_connect(self, af, addr, success):
-        future = self.connect_futures.pop((af, addr))
-        if success:
-            future.set_result(self.streams[addr])
-        else:
-            self.streams.pop(addr)
-            future.set_exception(IOError())
-        # Run the loop to allow callbacks to be run.
-        self.io_loop.add_callback(self.stop)
-        self.wait()
-
-    def assert_connector_streams_closed(self, conn):
-        for stream in conn.streams:
-            self.assertTrue(stream.closed)
-
-    def start_connect(self, addrinfo):
-        conn = _Connector(addrinfo, self.create_stream)
-        # Give it a huge timeout; we'll trigger timeouts manually.
-        future = conn.start(3600, connect_timeout=self.io_loop.time() + 3600)
-        return conn, future
-
-    def test_immediate_success(self):
-        conn, future = self.start_connect(self.addrinfo)
-        self.assertEqual(list(self.connect_futures.keys()), [(AF1, "a")])
-        self.resolve_connect(AF1, "a", True)
-        self.assertEqual(future.result(), (AF1, "a", self.streams["a"]))
-
-    def test_immediate_failure(self):
-        # Fail with just one address.
-        conn, future = self.start_connect([(AF1, "a")])
-        self.assert_pending((AF1, "a"))
-        self.resolve_connect(AF1, "a", False)
-        self.assertRaises(IOError, future.result)
-
-    def test_one_family_second_try(self):
-        conn, future = self.start_connect([(AF1, "a"), (AF1, "b")])
-        self.assert_pending((AF1, "a"))
-        self.resolve_connect(AF1, "a", False)
-        self.assert_pending((AF1, "b"))
-        self.resolve_connect(AF1, "b", True)
-        self.assertEqual(future.result(), (AF1, "b", self.streams["b"]))
-
-    def test_one_family_second_try_failure(self):
-        conn, future = self.start_connect([(AF1, "a"), (AF1, "b")])
-        self.assert_pending((AF1, "a"))
-        self.resolve_connect(AF1, "a", False)
-        self.assert_pending((AF1, "b"))
-        self.resolve_connect(AF1, "b", False)
-        self.assertRaises(IOError, future.result)
-
-    def test_one_family_second_try_timeout(self):
-        conn, future = self.start_connect([(AF1, "a"), (AF1, "b")])
-        self.assert_pending((AF1, "a"))
-        # trigger the timeout while the first lookup is pending;
-        # nothing happens.
-        conn.on_timeout()
-        self.assert_pending((AF1, "a"))
-        self.resolve_connect(AF1, "a", False)
-        self.assert_pending((AF1, "b"))
-        self.resolve_connect(AF1, "b", True)
-        self.assertEqual(future.result(), (AF1, "b", self.streams["b"]))
-
-    def test_two_families_immediate_failure(self):
-        conn, future = self.start_connect(self.addrinfo)
-        self.assert_pending((AF1, "a"))
-        self.resolve_connect(AF1, "a", False)
-        self.assert_pending((AF1, "b"), (AF2, "c"))
-        self.resolve_connect(AF1, "b", False)
-        self.resolve_connect(AF2, "c", True)
-        self.assertEqual(future.result(), (AF2, "c", self.streams["c"]))
-
-    def test_two_families_timeout(self):
-        conn, future = self.start_connect(self.addrinfo)
-        self.assert_pending((AF1, "a"))
-        conn.on_timeout()
-        self.assert_pending((AF1, "a"), (AF2, "c"))
-        self.resolve_connect(AF2, "c", True)
-        self.assertEqual(future.result(), (AF2, "c", self.streams["c"]))
-        # resolving 'a' after the connection has completed doesn't start 'b'
-        self.resolve_connect(AF1, "a", False)
-        self.assert_pending()
-
-    def test_success_after_timeout(self):
-        conn, future = self.start_connect(self.addrinfo)
-        self.assert_pending((AF1, "a"))
-        conn.on_timeout()
-        self.assert_pending((AF1, "a"), (AF2, "c"))
-        self.resolve_connect(AF1, "a", True)
-        self.assertEqual(future.result(), (AF1, "a", self.streams["a"]))
-        # resolving 'c' after completion closes the connection.
-        self.resolve_connect(AF2, "c", True)
-        self.assertTrue(self.streams.pop("c").closed)
-
-    def test_all_fail(self):
-        conn, future = self.start_connect(self.addrinfo)
-        self.assert_pending((AF1, "a"))
-        conn.on_timeout()
-        self.assert_pending((AF1, "a"), (AF2, "c"))
-        self.resolve_connect(AF2, "c", False)
-        self.assert_pending((AF1, "a"), (AF2, "d"))
-        self.resolve_connect(AF2, "d", False)
-        # one queue is now empty
-        self.assert_pending((AF1, "a"))
-        self.resolve_connect(AF1, "a", False)
-        self.assert_pending((AF1, "b"))
-        self.assertFalse(future.done())
-        self.resolve_connect(AF1, "b", False)
-        self.assertRaises(IOError, future.result)
-
-    def test_one_family_timeout_after_connect_timeout(self):
-        conn, future = self.start_connect([(AF1, "a"), (AF1, "b")])
-        self.assert_pending((AF1, "a"))
-        conn.on_connect_timeout()
-        # the connector will close all streams on connect timeout, we
-        # should explicitly pop the connect_future.
-        self.connect_futures.pop((AF1, "a"))
-        self.assertTrue(self.streams.pop("a").closed)
-        conn.on_timeout()
-        # if the future is set with TimeoutError, we will not iterate next
-        # possible address.
-        self.assert_pending()
-        self.assertEqual(len(conn.streams), 1)
-        self.assert_connector_streams_closed(conn)
-        self.assertRaises(TimeoutError, future.result)
-
-    def test_one_family_success_before_connect_timeout(self):
-        conn, future = self.start_connect([(AF1, "a"), (AF1, "b")])
-        self.assert_pending((AF1, "a"))
-        self.resolve_connect(AF1, "a", True)
-        conn.on_connect_timeout()
-        self.assert_pending()
-        self.assertEqual(self.streams["a"].closed, False)
-        # success stream will be pop
-        self.assertEqual(len(conn.streams), 0)
-        # streams in connector should be closed after connect timeout
-        self.assert_connector_streams_closed(conn)
-        self.assertEqual(future.result(), (AF1, "a", self.streams["a"]))
-
-    def test_one_family_second_try_after_connect_timeout(self):
-        conn, future = self.start_connect([(AF1, "a"), (AF1, "b")])
-        self.assert_pending((AF1, "a"))
-        self.resolve_connect(AF1, "a", False)
-        self.assert_pending((AF1, "b"))
-        conn.on_connect_timeout()
-        self.connect_futures.pop((AF1, "b"))
-        self.assertTrue(self.streams.pop("b").closed)
-        self.assert_pending()
-        self.assertEqual(len(conn.streams), 2)
-        self.assert_connector_streams_closed(conn)
-        self.assertRaises(TimeoutError, future.result)
-
-    def test_one_family_second_try_failure_before_connect_timeout(self):
-        conn, future = self.start_connect([(AF1, "a"), (AF1, "b")])
-        self.assert_pending((AF1, "a"))
-        self.resolve_connect(AF1, "a", False)
-        self.assert_pending((AF1, "b"))
-        self.resolve_connect(AF1, "b", False)
-        conn.on_connect_timeout()
-        self.assert_pending()
-        self.assertEqual(len(conn.streams), 2)
-        self.assert_connector_streams_closed(conn)
-        self.assertRaises(IOError, future.result)
-
-    def test_two_family_timeout_before_connect_timeout(self):
-        conn, future = self.start_connect(self.addrinfo)
-        self.assert_pending((AF1, "a"))
-        conn.on_timeout()
-        self.assert_pending((AF1, "a"), (AF2, "c"))
-        conn.on_connect_timeout()
-        self.connect_futures.pop((AF1, "a"))
-        self.assertTrue(self.streams.pop("a").closed)
-        self.connect_futures.pop((AF2, "c"))
-        self.assertTrue(self.streams.pop("c").closed)
-        self.assert_pending()
-        self.assertEqual(len(conn.streams), 2)
-        self.assert_connector_streams_closed(conn)
-        self.assertRaises(TimeoutError, future.result)
-
-    def test_two_family_success_after_timeout(self):
-        conn, future = self.start_connect(self.addrinfo)
-        self.assert_pending((AF1, "a"))
-        conn.on_timeout()
-        self.assert_pending((AF1, "a"), (AF2, "c"))
-        self.resolve_connect(AF1, "a", True)
-        # if one of streams succeed, connector will close all other streams
-        self.connect_futures.pop((AF2, "c"))
-        self.assertTrue(self.streams.pop("c").closed)
-        self.assert_pending()
-        self.assertEqual(len(conn.streams), 1)
-        self.assert_connector_streams_closed(conn)
-        self.assertEqual(future.result(), (AF1, "a", self.streams["a"]))
-
-    def test_two_family_timeout_after_connect_timeout(self):
-        conn, future = self.start_connect(self.addrinfo)
-        self.assert_pending((AF1, "a"))
-        conn.on_connect_timeout()
-        self.connect_futures.pop((AF1, "a"))
-        self.assertTrue(self.streams.pop("a").closed)
-        self.assert_pending()
-        conn.on_timeout()
-        # if the future is set with TimeoutError, connector will not
-        # trigger secondary address.
-        self.assert_pending()
-        self.assertEqual(len(conn.streams), 1)
-        self.assert_connector_streams_closed(conn)
-        self.assertRaises(TimeoutError, future.result)
diff --git a/venv/lib/python3.7/site-packages/tornado/test/tcpserver_test.py b/venv/lib/python3.7/site-packages/tornado/test/tcpserver_test.py
deleted file mode 100644
index 7c75acf..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/tcpserver_test.py
+++ /dev/null
@@ -1,192 +0,0 @@
-import socket
-import subprocess
-import sys
-import textwrap
-import unittest
-
-from tornado.escape import utf8, to_unicode
-from tornado import gen
-from tornado.iostream import IOStream
-from tornado.log import app_log
-from tornado.tcpserver import TCPServer
-from tornado.test.util import skipIfNonUnix
-from tornado.testing import AsyncTestCase, ExpectLog, bind_unused_port, gen_test
-
-
-class TCPServerTest(AsyncTestCase):
-    @gen_test
-    def test_handle_stream_coroutine_logging(self):
-        # handle_stream may be a coroutine and any exception in its
-        # Future will be logged.
-        class TestServer(TCPServer):
-            @gen.coroutine
-            def handle_stream(self, stream, address):
-                yield stream.read_bytes(len(b"hello"))
-                stream.close()
-                1 / 0
-
-        server = client = None
-        try:
-            sock, port = bind_unused_port()
-            server = TestServer()
-            server.add_socket(sock)
-            client = IOStream(socket.socket())
-            with ExpectLog(app_log, "Exception in callback"):
-                yield client.connect(("localhost", port))
-                yield client.write(b"hello")
-                yield client.read_until_close()
-                yield gen.moment
-        finally:
-            if server is not None:
-                server.stop()
-            if client is not None:
-                client.close()
-
-    @gen_test
-    def test_handle_stream_native_coroutine(self):
-        # handle_stream may be a native coroutine.
-
-        class TestServer(TCPServer):
-            async def handle_stream(self, stream, address):
-                stream.write(b"data")
-                stream.close()
-
-        sock, port = bind_unused_port()
-        server = TestServer()
-        server.add_socket(sock)
-        client = IOStream(socket.socket())
-        yield client.connect(("localhost", port))
-        result = yield client.read_until_close()
-        self.assertEqual(result, b"data")
-        server.stop()
-        client.close()
-
-    def test_stop_twice(self):
-        sock, port = bind_unused_port()
-        server = TCPServer()
-        server.add_socket(sock)
-        server.stop()
-        server.stop()
-
-    @gen_test
-    def test_stop_in_callback(self):
-        # Issue #2069: calling server.stop() in a loop callback should not
-        # raise EBADF when the loop handles other server connection
-        # requests in the same loop iteration
-
-        class TestServer(TCPServer):
-            @gen.coroutine
-            def handle_stream(self, stream, address):
-                server.stop()  # type: ignore
-                yield stream.read_until_close()
-
-        sock, port = bind_unused_port()
-        server = TestServer()
-        server.add_socket(sock)
-        server_addr = ("localhost", port)
-        N = 40
-        clients = [IOStream(socket.socket()) for i in range(N)]
-        connected_clients = []
-
-        @gen.coroutine
-        def connect(c):
-            try:
-                yield c.connect(server_addr)
-            except EnvironmentError:
-                pass
-            else:
-                connected_clients.append(c)
-
-        yield [connect(c) for c in clients]
-
-        self.assertGreater(len(connected_clients), 0, "all clients failed connecting")
-        try:
-            if len(connected_clients) == N:
-                # Ideally we'd make the test deterministic, but we're testing
-                # for a race condition in combination with the system's TCP stack...
-                self.skipTest(
-                    "at least one client should fail connecting "
-                    "for the test to be meaningful"
-                )
-        finally:
-            for c in connected_clients:
-                c.close()
-
-        # Here tearDown() would re-raise the EBADF encountered in the IO loop
-
-
-@skipIfNonUnix
-class TestMultiprocess(unittest.TestCase):
-    # These tests verify that the two multiprocess examples from the
-    # TCPServer docs work. Both tests start a server with three worker
-    # processes, each of which prints its task id to stdout (a single
-    # byte, so we don't have to worry about atomicity of the shared
-    # stdout stream) and then exits.
-    def run_subproc(self, code):
-        proc = subprocess.Popen(
-            sys.executable, stdin=subprocess.PIPE, stdout=subprocess.PIPE
-        )
-        proc.stdin.write(utf8(code))
-        proc.stdin.close()
-        proc.wait()
-        stdout = proc.stdout.read()
-        proc.stdout.close()
-        if proc.returncode != 0:
-            raise RuntimeError(
-                "Process returned %d. stdout=%r" % (proc.returncode, stdout)
-            )
-        return to_unicode(stdout)
-
-    def test_single(self):
-        # As a sanity check, run the single-process version through this test
-        # harness too.
-        code = textwrap.dedent(
-            """
-            from tornado.ioloop import IOLoop
-            from tornado.tcpserver import TCPServer
-
-            server = TCPServer()
-            server.listen(0, address='127.0.0.1')
-            IOLoop.current().run_sync(lambda: None)
-            print('012', end='')
-        """
-        )
-        out = self.run_subproc(code)
-        self.assertEqual("".join(sorted(out)), "012")
-
-    def test_simple(self):
-        code = textwrap.dedent(
-            """
-            from tornado.ioloop import IOLoop
-            from tornado.process import task_id
-            from tornado.tcpserver import TCPServer
-
-            server = TCPServer()
-            server.bind(0, address='127.0.0.1')
-            server.start(3)
-            IOLoop.current().run_sync(lambda: None)
-            print(task_id(), end='')
-        """
-        )
-        out = self.run_subproc(code)
-        self.assertEqual("".join(sorted(out)), "012")
-
-    def test_advanced(self):
-        code = textwrap.dedent(
-            """
-            from tornado.ioloop import IOLoop
-            from tornado.netutil import bind_sockets
-            from tornado.process import fork_processes, task_id
-            from tornado.ioloop import IOLoop
-            from tornado.tcpserver import TCPServer
-
-            sockets = bind_sockets(0, address='127.0.0.1')
-            fork_processes(3)
-            server = TCPServer()
-            server.add_sockets(sockets)
-            IOLoop.current().run_sync(lambda: None)
-            print(task_id(), end='')
-        """
-        )
-        out = self.run_subproc(code)
-        self.assertEqual("".join(sorted(out)), "012")
diff --git a/venv/lib/python3.7/site-packages/tornado/test/template_test.py b/venv/lib/python3.7/site-packages/tornado/test/template_test.py
deleted file mode 100644
index f71f037..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/template_test.py
+++ /dev/null
@@ -1,536 +0,0 @@
-import os
-import traceback
-import unittest
-
-from tornado.escape import utf8, native_str, to_unicode
-from tornado.template import Template, DictLoader, ParseError, Loader
-from tornado.util import ObjectDict
-
-import typing  # noqa: F401
-
-
-class TemplateTest(unittest.TestCase):
-    def test_simple(self):
-        template = Template("Hello {{ name }}!")
-        self.assertEqual(template.generate(name="Ben"), b"Hello Ben!")
-
-    def test_bytes(self):
-        template = Template("Hello {{ name }}!")
-        self.assertEqual(template.generate(name=utf8("Ben")), b"Hello Ben!")
-
-    def test_expressions(self):
-        template = Template("2 + 2 = {{ 2 + 2 }}")
-        self.assertEqual(template.generate(), b"2 + 2 = 4")
-
-    def test_comment(self):
-        template = Template("Hello{# TODO i18n #} {{ name }}!")
-        self.assertEqual(template.generate(name=utf8("Ben")), b"Hello Ben!")
-
-    def test_include(self):
-        loader = DictLoader(
-            {
-                "index.html": '{% include "header.html" %}\nbody text',
-                "header.html": "header text",
-            }
-        )
-        self.assertEqual(
-            loader.load("index.html").generate(), b"header text\nbody text"
-        )
-
-    def test_extends(self):
-        loader = DictLoader(
-            {
-                "base.html": """\
-<title>{% block title %}default title{% end %}</title>
-<body>{% block body %}default body{% end %}</body>
-""",
-                "page.html": """\
-{% extends "base.html" %}
-{% block title %}page title{% end %}
-{% block body %}page body{% end %}
-""",
-            }
-        )
-        self.assertEqual(
-            loader.load("page.html").generate(),
-            b"<title>page title</title>\n<body>page body</body>\n",
-        )
-
-    def test_relative_load(self):
-        loader = DictLoader(
-            {
-                "a/1.html": "{% include '2.html' %}",
-                "a/2.html": "{% include '../b/3.html' %}",
-                "b/3.html": "ok",
-            }
-        )
-        self.assertEqual(loader.load("a/1.html").generate(), b"ok")
-
-    def test_escaping(self):
-        self.assertRaises(ParseError, lambda: Template("{{"))
-        self.assertRaises(ParseError, lambda: Template("{%"))
-        self.assertEqual(Template("{{!").generate(), b"{{")
-        self.assertEqual(Template("{%!").generate(), b"{%")
-        self.assertEqual(Template("{#!").generate(), b"{#")
-        self.assertEqual(
-            Template("{{ 'expr' }} {{!jquery expr}}").generate(),
-            b"expr {{jquery expr}}",
-        )
-
-    def test_unicode_template(self):
-        template = Template(utf8(u"\u00e9"))
-        self.assertEqual(template.generate(), utf8(u"\u00e9"))
-
-    def test_unicode_literal_expression(self):
-        # Unicode literals should be usable in templates.  Note that this
-        # test simulates unicode characters appearing directly in the
-        # template file (with utf8 encoding), i.e. \u escapes would not
-        # be used in the template file itself.
-        template = Template(utf8(u'{{ "\u00e9" }}'))
-        self.assertEqual(template.generate(), utf8(u"\u00e9"))
-
-    def test_custom_namespace(self):
-        loader = DictLoader(
-            {"test.html": "{{ inc(5) }}"}, namespace={"inc": lambda x: x + 1}
-        )
-        self.assertEqual(loader.load("test.html").generate(), b"6")
-
-    def test_apply(self):
-        def upper(s):
-            return s.upper()
-
-        template = Template(utf8("{% apply upper %}foo{% end %}"))
-        self.assertEqual(template.generate(upper=upper), b"FOO")
-
-    def test_unicode_apply(self):
-        def upper(s):
-            return to_unicode(s).upper()
-
-        template = Template(utf8(u"{% apply upper %}foo \u00e9{% end %}"))
-        self.assertEqual(template.generate(upper=upper), utf8(u"FOO \u00c9"))
-
-    def test_bytes_apply(self):
-        def upper(s):
-            return utf8(to_unicode(s).upper())
-
-        template = Template(utf8(u"{% apply upper %}foo \u00e9{% end %}"))
-        self.assertEqual(template.generate(upper=upper), utf8(u"FOO \u00c9"))
-
-    def test_if(self):
-        template = Template(utf8("{% if x > 4 %}yes{% else %}no{% end %}"))
-        self.assertEqual(template.generate(x=5), b"yes")
-        self.assertEqual(template.generate(x=3), b"no")
-
-    def test_if_empty_body(self):
-        template = Template(utf8("{% if True %}{% else %}{% end %}"))
-        self.assertEqual(template.generate(), b"")
-
-    def test_try(self):
-        template = Template(
-            utf8(
-                """{% try %}
-try{% set y = 1/x %}
-{% except %}-except
-{% else %}-else
-{% finally %}-finally
-{% end %}"""
-            )
-        )
-        self.assertEqual(template.generate(x=1), b"\ntry\n-else\n-finally\n")
-        self.assertEqual(template.generate(x=0), b"\ntry-except\n-finally\n")
-
-    def test_comment_directive(self):
-        template = Template(utf8("{% comment blah blah %}foo"))
-        self.assertEqual(template.generate(), b"foo")
-
-    def test_break_continue(self):
-        template = Template(
-            utf8(
-                """\
-{% for i in range(10) %}
-    {% if i == 2 %}
-        {% continue %}
-    {% end %}
-    {{ i }}
-    {% if i == 6 %}
-        {% break %}
-    {% end %}
-{% end %}"""
-            )
-        )
-        result = template.generate()
-        # remove extraneous whitespace
-        result = b"".join(result.split())
-        self.assertEqual(result, b"013456")
-
-    def test_break_outside_loop(self):
-        try:
-            Template(utf8("{% break %}"))
-            raise Exception("Did not get expected exception")
-        except ParseError:
-            pass
-
-    def test_break_in_apply(self):
-        # This test verifies current behavior, although of course it would
-        # be nice if apply didn't cause seemingly unrelated breakage
-        try:
-            Template(
-                utf8("{% for i in [] %}{% apply foo %}{% break %}{% end %}{% end %}")
-            )
-            raise Exception("Did not get expected exception")
-        except ParseError:
-            pass
-
-    @unittest.skip("no testable future imports")
-    def test_no_inherit_future(self):
-        # TODO(bdarnell): make a test like this for one of the future
-        # imports available in python 3. Unfortunately they're harder
-        # to use in a template than division was.
-
-        # This file has from __future__ import division...
-        self.assertEqual(1 / 2, 0.5)
-        # ...but the template doesn't
-        template = Template("{{ 1 / 2 }}")
-        self.assertEqual(template.generate(), "0")
-
-    def test_non_ascii_name(self):
-        loader = DictLoader({u"t\u00e9st.html": "hello"})
-        self.assertEqual(loader.load(u"t\u00e9st.html").generate(), b"hello")
-
-
-class StackTraceTest(unittest.TestCase):
-    def test_error_line_number_expression(self):
-        loader = DictLoader(
-            {
-                "test.html": """one
-two{{1/0}}
-three
-        """
-            }
-        )
-        try:
-            loader.load("test.html").generate()
-            self.fail("did not get expected exception")
-        except ZeroDivisionError:
-            self.assertTrue("# test.html:2" in traceback.format_exc())
-
-    def test_error_line_number_directive(self):
-        loader = DictLoader(
-            {
-                "test.html": """one
-two{%if 1/0%}
-three{%end%}
-        """
-            }
-        )
-        try:
-            loader.load("test.html").generate()
-            self.fail("did not get expected exception")
-        except ZeroDivisionError:
-            self.assertTrue("# test.html:2" in traceback.format_exc())
-
-    def test_error_line_number_module(self):
-        loader = None  # type: typing.Optional[DictLoader]
-
-        def load_generate(path, **kwargs):
-            assert loader is not None
-            return loader.load(path).generate(**kwargs)
-
-        loader = DictLoader(
-            {"base.html": "{% module Template('sub.html') %}", "sub.html": "{{1/0}}"},
-            namespace={"_tt_modules": ObjectDict(Template=load_generate)},
-        )
-        try:
-            loader.load("base.html").generate()
-            self.fail("did not get expected exception")
-        except ZeroDivisionError:
-            exc_stack = traceback.format_exc()
-            self.assertTrue("# base.html:1" in exc_stack)
-            self.assertTrue("# sub.html:1" in exc_stack)
-
-    def test_error_line_number_include(self):
-        loader = DictLoader(
-            {"base.html": "{% include 'sub.html' %}", "sub.html": "{{1/0}}"}
-        )
-        try:
-            loader.load("base.html").generate()
-            self.fail("did not get expected exception")
-        except ZeroDivisionError:
-            self.assertTrue("# sub.html:1 (via base.html:1)" in traceback.format_exc())
-
-    def test_error_line_number_extends_base_error(self):
-        loader = DictLoader(
-            {"base.html": "{{1/0}}", "sub.html": "{% extends 'base.html' %}"}
-        )
-        try:
-            loader.load("sub.html").generate()
-            self.fail("did not get expected exception")
-        except ZeroDivisionError:
-            exc_stack = traceback.format_exc()
-        self.assertTrue("# base.html:1" in exc_stack)
-
-    def test_error_line_number_extends_sub_error(self):
-        loader = DictLoader(
-            {
-                "base.html": "{% block 'block' %}{% end %}",
-                "sub.html": """
-{% extends 'base.html' %}
-{% block 'block' %}
-{{1/0}}
-{% end %}
-            """,
-            }
-        )
-        try:
-            loader.load("sub.html").generate()
-            self.fail("did not get expected exception")
-        except ZeroDivisionError:
-            self.assertTrue("# sub.html:4 (via base.html:1)" in traceback.format_exc())
-
-    def test_multi_includes(self):
-        loader = DictLoader(
-            {
-                "a.html": "{% include 'b.html' %}",
-                "b.html": "{% include 'c.html' %}",
-                "c.html": "{{1/0}}",
-            }
-        )
-        try:
-            loader.load("a.html").generate()
-            self.fail("did not get expected exception")
-        except ZeroDivisionError:
-            self.assertTrue(
-                "# c.html:1 (via b.html:1, a.html:1)" in traceback.format_exc()
-            )
-
-
-class ParseErrorDetailTest(unittest.TestCase):
-    def test_details(self):
-        loader = DictLoader({"foo.html": "\n\n{{"})
-        with self.assertRaises(ParseError) as cm:
-            loader.load("foo.html")
-        self.assertEqual("Missing end expression }} at foo.html:3", str(cm.exception))
-        self.assertEqual("foo.html", cm.exception.filename)
-        self.assertEqual(3, cm.exception.lineno)
-
-    def test_custom_parse_error(self):
-        # Make sure that ParseErrors remain compatible with their
-        # pre-4.3 signature.
-        self.assertEqual("asdf at None:0", str(ParseError("asdf")))
-
-
-class AutoEscapeTest(unittest.TestCase):
-    def setUp(self):
-        self.templates = {
-            "escaped.html": "{% autoescape xhtml_escape %}{{ name }}",
-            "unescaped.html": "{% autoescape None %}{{ name }}",
-            "default.html": "{{ name }}",
-            "include.html": """\
-escaped: {% include 'escaped.html' %}
-unescaped: {% include 'unescaped.html' %}
-default: {% include 'default.html' %}
-""",
-            "escaped_block.html": """\
-{% autoescape xhtml_escape %}\
-{% block name %}base: {{ name }}{% end %}""",
-            "unescaped_block.html": """\
-{% autoescape None %}\
-{% block name %}base: {{ name }}{% end %}""",
-            # Extend a base template with different autoescape policy,
-            # with and without overriding the base's blocks
-            "escaped_extends_unescaped.html": """\
-{% autoescape xhtml_escape %}\
-{% extends "unescaped_block.html" %}""",
-            "escaped_overrides_unescaped.html": """\
-{% autoescape xhtml_escape %}\
-{% extends "unescaped_block.html" %}\
-{% block name %}extended: {{ name }}{% end %}""",
-            "unescaped_extends_escaped.html": """\
-{% autoescape None %}\
-{% extends "escaped_block.html" %}""",
-            "unescaped_overrides_escaped.html": """\
-{% autoescape None %}\
-{% extends "escaped_block.html" %}\
-{% block name %}extended: {{ name }}{% end %}""",
-            "raw_expression.html": """\
-{% autoescape xhtml_escape %}\
-expr: {{ name }}
-raw: {% raw name %}""",
-        }
-
-    def test_default_off(self):
-        loader = DictLoader(self.templates, autoescape=None)
-        name = "Bobby <table>s"
-        self.assertEqual(
-            loader.load("escaped.html").generate(name=name), b"Bobby &lt;table&gt;s"
-        )
-        self.assertEqual(
-            loader.load("unescaped.html").generate(name=name), b"Bobby <table>s"
-        )
-        self.assertEqual(
-            loader.load("default.html").generate(name=name), b"Bobby <table>s"
-        )
-
-        self.assertEqual(
-            loader.load("include.html").generate(name=name),
-            b"escaped: Bobby &lt;table&gt;s\n"
-            b"unescaped: Bobby <table>s\n"
-            b"default: Bobby <table>s\n",
-        )
-
-    def test_default_on(self):
-        loader = DictLoader(self.templates, autoescape="xhtml_escape")
-        name = "Bobby <table>s"
-        self.assertEqual(
-            loader.load("escaped.html").generate(name=name), b"Bobby &lt;table&gt;s"
-        )
-        self.assertEqual(
-            loader.load("unescaped.html").generate(name=name), b"Bobby <table>s"
-        )
-        self.assertEqual(
-            loader.load("default.html").generate(name=name), b"Bobby &lt;table&gt;s"
-        )
-
-        self.assertEqual(
-            loader.load("include.html").generate(name=name),
-            b"escaped: Bobby &lt;table&gt;s\n"
-            b"unescaped: Bobby <table>s\n"
-            b"default: Bobby &lt;table&gt;s\n",
-        )
-
-    def test_unextended_block(self):
-        loader = DictLoader(self.templates)
-        name = "<script>"
-        self.assertEqual(
-            loader.load("escaped_block.html").generate(name=name),
-            b"base: &lt;script&gt;",
-        )
-        self.assertEqual(
-            loader.load("unescaped_block.html").generate(name=name), b"base: <script>"
-        )
-
-    def test_extended_block(self):
-        loader = DictLoader(self.templates)
-
-        def render(name):
-            return loader.load(name).generate(name="<script>")
-
-        self.assertEqual(render("escaped_extends_unescaped.html"), b"base: <script>")
-        self.assertEqual(
-            render("escaped_overrides_unescaped.html"), b"extended: &lt;script&gt;"
-        )
-
-        self.assertEqual(
-            render("unescaped_extends_escaped.html"), b"base: &lt;script&gt;"
-        )
-        self.assertEqual(
-            render("unescaped_overrides_escaped.html"), b"extended: <script>"
-        )
-
-    def test_raw_expression(self):
-        loader = DictLoader(self.templates)
-
-        def render(name):
-            return loader.load(name).generate(name='<>&"')
-
-        self.assertEqual(
-            render("raw_expression.html"), b"expr: &lt;&gt;&amp;&quot;\n" b'raw: <>&"'
-        )
-
-    def test_custom_escape(self):
-        loader = DictLoader({"foo.py": "{% autoescape py_escape %}s = {{ name }}\n"})
-
-        def py_escape(s):
-            self.assertEqual(type(s), bytes)
-            return repr(native_str(s))
-
-        def render(template, name):
-            return loader.load(template).generate(py_escape=py_escape, name=name)
-
-        self.assertEqual(render("foo.py", "<html>"), b"s = '<html>'\n")
-        self.assertEqual(render("foo.py", "';sys.exit()"), b"""s = "';sys.exit()"\n""")
-        self.assertEqual(
-            render("foo.py", ["not a string"]), b"""s = "['not a string']"\n"""
-        )
-
-    def test_manual_minimize_whitespace(self):
-        # Whitespace including newlines is allowed within template tags
-        # and directives, and this is one way to avoid long lines while
-        # keeping extra whitespace out of the rendered output.
-        loader = DictLoader(
-            {
-                "foo.txt": """\
-{% for i in items
-  %}{% if i > 0 %}, {% end %}{#
-  #}{{i
-  }}{% end
-%}"""
-            }
-        )
-        self.assertEqual(
-            loader.load("foo.txt").generate(items=range(5)), b"0, 1, 2, 3, 4"
-        )
-
-    def test_whitespace_by_filename(self):
-        # Default whitespace handling depends on the template filename.
-        loader = DictLoader(
-            {
-                "foo.html": "   \n\t\n asdf\t   ",
-                "bar.js": " \n\n\n\t qwer     ",
-                "baz.txt": "\t    zxcv\n\n",
-                "include.html": "  {% include baz.txt %} \n ",
-                "include.txt": "\t\t{% include foo.html %}    ",
-            }
-        )
-
-        # HTML and JS files have whitespace compressed by default.
-        self.assertEqual(loader.load("foo.html").generate(), b"\nasdf ")
-        self.assertEqual(loader.load("bar.js").generate(), b"\nqwer ")
-        # TXT files do not.
-        self.assertEqual(loader.load("baz.txt").generate(), b"\t    zxcv\n\n")
-
-        # Each file maintains its own status even when included in
-        # a file of the other type.
-        self.assertEqual(loader.load("include.html").generate(), b" \t    zxcv\n\n\n")
-        self.assertEqual(loader.load("include.txt").generate(), b"\t\t\nasdf     ")
-
-    def test_whitespace_by_loader(self):
-        templates = {"foo.html": "\t\tfoo\n\n", "bar.txt": "\t\tbar\n\n"}
-        loader = DictLoader(templates, whitespace="all")
-        self.assertEqual(loader.load("foo.html").generate(), b"\t\tfoo\n\n")
-        self.assertEqual(loader.load("bar.txt").generate(), b"\t\tbar\n\n")
-
-        loader = DictLoader(templates, whitespace="single")
-        self.assertEqual(loader.load("foo.html").generate(), b" foo\n")
-        self.assertEqual(loader.load("bar.txt").generate(), b" bar\n")
-
-        loader = DictLoader(templates, whitespace="oneline")
-        self.assertEqual(loader.load("foo.html").generate(), b" foo ")
-        self.assertEqual(loader.load("bar.txt").generate(), b" bar ")
-
-    def test_whitespace_directive(self):
-        loader = DictLoader(
-            {
-                "foo.html": """\
-{% whitespace oneline %}
-    {% for i in range(3) %}
-        {{ i }}
-    {% end %}
-{% whitespace all %}
-    pre\tformatted
-"""
-            }
-        )
-        self.assertEqual(
-            loader.load("foo.html").generate(), b"  0  1  2  \n    pre\tformatted\n"
-        )
-
-
-class TemplateLoaderTest(unittest.TestCase):
-    def setUp(self):
-        self.loader = Loader(os.path.join(os.path.dirname(__file__), "templates"))
-
-    def test_utf8_in_file(self):
-        tmpl = self.loader.load("utf8.html")
-        result = tmpl.generate()
-        self.assertEqual(to_unicode(result).strip(), u"H\u00e9llo")
diff --git a/venv/lib/python3.7/site-packages/tornado/test/templates/utf8.html b/venv/lib/python3.7/site-packages/tornado/test/templates/utf8.html
deleted file mode 100644
index c5253df..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/templates/utf8.html
+++ /dev/null
@@ -1 +0,0 @@
-Héllo
diff --git a/venv/lib/python3.7/site-packages/tornado/test/test.crt b/venv/lib/python3.7/site-packages/tornado/test/test.crt
deleted file mode 100644
index ffc49b0..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/test.crt
+++ /dev/null
@@ -1,20 +0,0 @@
------BEGIN CERTIFICATE-----
-MIIDWzCCAkOgAwIBAgIUV4spou0CenmvKqa7Hml/MC+JKiAwDQYJKoZIhvcNAQEL
-BQAwPTELMAkGA1UEBhMCVVMxEzARBgNVBAgMCkNhbGlmb3JuaWExGTAXBgNVBAoM
-EFRvcm5hZG8gV2ViIFRlc3QwHhcNMTgwOTI5MTM1NjQ1WhcNMjgwOTI2MTM1NjQ1
-WjA9MQswCQYDVQQGEwJVUzETMBEGA1UECAwKQ2FsaWZvcm5pYTEZMBcGA1UECgwQ
-VG9ybmFkbyBXZWIgVGVzdDCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEB
-AKT0LdyI8tW5uwP3ahE8BFSz+j3SsKBDv/0cKvqxVVE6sLEST2s3HjArZvIIG5sb
-iBkWDrqnZ6UKDvB4jlobLGAkepxDbrxHWxK53n0C28XXGLqJQ01TlTZ5rpjttMeg
-5SKNjHbxpOvpUwwQS4br4WjZKKyTGiXpFkFUty+tYVU35/U2yyvreWHmzpHx/25t
-H7O2RBARVwJYKOGPtlH62lQjpIWfVfklY4Ip8Hjl3B6rBxPyBULmVQw0qgoZn648
-oa4oLjs0wnYBz01gVjNMDHej52SsB/ieH7W1TxFMzqOlcvHh41uFbQJPgcXsruSS
-9Z4twzSWkUp2vk/C//4Sz38CAwEAAaNTMFEwHQYDVR0OBBYEFLf8fQ5+u8sDWAd3
-r5ZjZ5MmDWJeMB8GA1UdIwQYMBaAFLf8fQ5+u8sDWAd3r5ZjZ5MmDWJeMA8GA1Ud
-EwEB/wQFMAMBAf8wDQYJKoZIhvcNAQELBQADggEBADkkm3pIb9IeqVNmQ2uhQOgw
-UwyToTYUHNTb/Nm5lzBTBqC8gbXAS24RQ30AB/7G115Uxeo+YMKfITxm/CgR+vhF
-F59/YrzwXj+G8bdbuVl/UbB6f9RSp+Zo93rUZAtPWr77gxLUrcwSRzzDwxFjC2nC
-6eigbkvt1OQY775RwnFAt7HKPclE0Out+cGJIboJuO1f3r57ZdyFH0GzbZEff/7K
-atGXohijWJjYvU4mk0KFHORZrcBpsv9cfkFbmgVmiRwxRJ1tLauHM3Ne+VfqYE5M
-4rTStSyz3ASqVKJ2iFMQueNR/tUOuDlfRt+0nhJMuYSSkW+KTgnwyOGU9cv+mxA=
------END CERTIFICATE-----
diff --git a/venv/lib/python3.7/site-packages/tornado/test/test.key b/venv/lib/python3.7/site-packages/tornado/test/test.key
deleted file mode 100644
index 7cb7d8d..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/test.key
+++ /dev/null
@@ -1,28 +0,0 @@
------BEGIN PRIVATE KEY-----
-MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQCk9C3ciPLVubsD
-92oRPARUs/o90rCgQ7/9HCr6sVVROrCxEk9rNx4wK2byCBubG4gZFg66p2elCg7w
-eI5aGyxgJHqcQ268R1sSud59AtvF1xi6iUNNU5U2ea6Y7bTHoOUijYx28aTr6VMM
-EEuG6+Fo2Siskxol6RZBVLcvrWFVN+f1Nssr63lh5s6R8f9ubR+ztkQQEVcCWCjh
-j7ZR+tpUI6SFn1X5JWOCKfB45dweqwcT8gVC5lUMNKoKGZ+uPKGuKC47NMJ2Ac9N
-YFYzTAx3o+dkrAf4nh+1tU8RTM6jpXLx4eNbhW0CT4HF7K7kkvWeLcM0lpFKdr5P
-wv/+Es9/AgMBAAECggEABi6AaXtYXloPgB6NgwfUwbfc8OQsalUfpMShd7OdluW0
-KW6eO05de0ClIvzay/1EJGyHMMeFQtIVrT1XWFkcWJ4FWkXMqJGkABenFtg8lDVz
-X8o1E3jGZrw4ptKBq9mDvL/BO9PiclTUH+ecbPn6AIvi0lTQ7grGIryiAM9mjmLy
-jpCwoutF2LD4RPNg8vqWe/Z1rQw5lp8FOHhRwPooHHeoq1bSrp8dqvVAwAam7Mmf
-uFgI8jrNycPgr2cwEEtbq2TQ625MhVnCpwT+kErmAStfbXXuqv1X1ZZgiNxf+61C
-OL0bhPRVIHmmjiK/5qHRuN4Q5u9/Yp2SJ4W5xadSQQKBgQDR7dnOlYYQiaoPJeD/
-7jcLVJbWwbr7bE19O/QpYAtkA/FtGlKr+hQxPhK6OYp+in8eHf+ga/NSAjCWRBoh
-MNAVCJtiirHo2tFsLFOmlJpGL9n3sX8UnkJN90oHfWrzJ8BZnXaSw2eOuyw8LLj+
-Q+ISl6Go8/xfsuy3EDv4AP1wCwKBgQDJJ4vEV3Kr+bc6N/xeu+G0oHvRAWwuQpcx
-9D+XpnqbJbFDnWKNE7oGsDCs8Qjr0CdFUN1pm1ppITDZ5N1cWuDg/47ZAXqEK6D1
-z13S7O0oQPlnsPL7mHs2Vl73muAaBPAojFvceHHfccr7Z94BXqKsiyfaWz6kclT/
-Nl4JTdsC3QKBgQCeYgozL2J/da2lUhnIXcyPstk+29kbueFYu/QBh2HwqnzqqLJ4
-5+t2H3P3plQUFp/DdDSZrvhcBiTsKiNgqThEtkKtfSCvIvBf4a2W/4TJsW6MzxCm
-2KQDuK/UqM4Y+APKWN/N6Lln2VWNbNyBkWuuRVKFatccyJyJnSjxeqW7cwKBgGyN
-idCYPIrwROAHLItXKvOWE5t0ABRq3TsZC2RkdA/b5HCPs4pclexcEriRjvXrK/Yt
-MH94Ve8b+UftSUQ4ytjBMS6MrLg87y0YDhLwxv8NKUq65DXAUOW+8JsAmmWQOqY3
-MK+m1BT4TMklgVoN3w3sPsKIsSJ/jLz5cv/kYweFAoGAG4iWU1378tI2Ts/Fngsv
-7eoWhoda77Y9D0Yoy20aN9VdMHzIYCBOubtRPEuwgaReNwbUBWap01J63yY/fF3K
-8PTz6covjoOJqxQJOvM7nM0CsJawG9ccw3YXyd9KgRIdSt6ooEhb7N8W2EXYoKl3
-g1i2t41Q/SC3HUGC5mJjpO8=
------END PRIVATE KEY-----
diff --git a/venv/lib/python3.7/site-packages/tornado/test/testing_test.py b/venv/lib/python3.7/site-packages/tornado/test/testing_test.py
deleted file mode 100644
index 03b3401..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/testing_test.py
+++ /dev/null
@@ -1,350 +0,0 @@
-from tornado import gen, ioloop
-from tornado.httpserver import HTTPServer
-from tornado.locks import Event
-from tornado.testing import AsyncHTTPTestCase, AsyncTestCase, bind_unused_port, gen_test
-from tornado.web import Application
-import asyncio
-import contextlib
-import gc
-import os
-import platform
-import traceback
-import unittest
-import warnings
-
-
-@contextlib.contextmanager
-def set_environ(name, value):
-    old_value = os.environ.get(name)
-    os.environ[name] = value
-
-    try:
-        yield
-    finally:
-        if old_value is None:
-            del os.environ[name]
-        else:
-            os.environ[name] = old_value
-
-
-class AsyncTestCaseTest(AsyncTestCase):
-    def test_wait_timeout(self):
-        time = self.io_loop.time
-
-        # Accept default 5-second timeout, no error
-        self.io_loop.add_timeout(time() + 0.01, self.stop)
-        self.wait()
-
-        # Timeout passed to wait()
-        self.io_loop.add_timeout(time() + 1, self.stop)
-        with self.assertRaises(self.failureException):
-            self.wait(timeout=0.01)
-
-        # Timeout set with environment variable
-        self.io_loop.add_timeout(time() + 1, self.stop)
-        with set_environ("ASYNC_TEST_TIMEOUT", "0.01"):
-            with self.assertRaises(self.failureException):
-                self.wait()
-
-    def test_subsequent_wait_calls(self):
-        """
-        This test makes sure that a second call to wait()
-        clears the first timeout.
-        """
-        self.io_loop.add_timeout(self.io_loop.time() + 0.00, self.stop)
-        self.wait(timeout=0.02)
-        self.io_loop.add_timeout(self.io_loop.time() + 0.03, self.stop)
-        self.wait(timeout=0.15)
-
-
-class LeakTest(AsyncTestCase):
-    def tearDown(self):
-        super().tearDown()
-        # Trigger a gc to make warnings more deterministic.
-        gc.collect()
-
-    def test_leaked_coroutine(self):
-        # This test verifies that "leaked" coroutines are shut down
-        # without triggering warnings like "task was destroyed but it
-        # is pending". If this test were to fail, it would fail
-        # because runtests.py detected unexpected output to stderr.
-        event = Event()
-
-        async def callback():
-            try:
-                await event.wait()
-            except asyncio.CancelledError:
-                pass
-
-        self.io_loop.add_callback(callback)
-        self.io_loop.add_callback(self.stop)
-        self.wait()
-
-
-class AsyncHTTPTestCaseTest(AsyncHTTPTestCase):
-    def setUp(self):
-        super(AsyncHTTPTestCaseTest, self).setUp()
-        # Bind a second port.
-        sock, port = bind_unused_port()
-        app = Application()
-        server = HTTPServer(app, **self.get_httpserver_options())
-        server.add_socket(sock)
-        self.second_port = port
-        self.second_server = server
-
-    def get_app(self):
-        return Application()
-
-    def test_fetch_segment(self):
-        path = "/path"
-        response = self.fetch(path)
-        self.assertEqual(response.request.url, self.get_url(path))
-
-    def test_fetch_full_http_url(self):
-        # Ensure that self.fetch() recognizes absolute urls and does
-        # not transform them into references to our main test server.
-        path = "http://localhost:%d/path" % self.second_port
-
-        response = self.fetch(path)
-        self.assertEqual(response.request.url, path)
-
-    def tearDown(self):
-        self.second_server.stop()
-        super(AsyncHTTPTestCaseTest, self).tearDown()
-
-
-class AsyncTestCaseWrapperTest(unittest.TestCase):
-    def test_undecorated_generator(self):
-        class Test(AsyncTestCase):
-            def test_gen(self):
-                yield
-
-        test = Test("test_gen")
-        result = unittest.TestResult()
-        test.run(result)
-        self.assertEqual(len(result.errors), 1)
-        self.assertIn("should be decorated", result.errors[0][1])
-
-    @unittest.skipIf(
-        platform.python_implementation() == "PyPy",
-        "pypy destructor warnings cannot be silenced",
-    )
-    def test_undecorated_coroutine(self):
-        class Test(AsyncTestCase):
-            async def test_coro(self):
-                pass
-
-        test = Test("test_coro")
-        result = unittest.TestResult()
-
-        # Silence "RuntimeWarning: coroutine 'test_coro' was never awaited".
-        with warnings.catch_warnings():
-            warnings.simplefilter("ignore")
-            test.run(result)
-
-        self.assertEqual(len(result.errors), 1)
-        self.assertIn("should be decorated", result.errors[0][1])
-
-    def test_undecorated_generator_with_skip(self):
-        class Test(AsyncTestCase):
-            @unittest.skip("don't run this")
-            def test_gen(self):
-                yield
-
-        test = Test("test_gen")
-        result = unittest.TestResult()
-        test.run(result)
-        self.assertEqual(len(result.errors), 0)
-        self.assertEqual(len(result.skipped), 1)
-
-    def test_other_return(self):
-        class Test(AsyncTestCase):
-            def test_other_return(self):
-                return 42
-
-        test = Test("test_other_return")
-        result = unittest.TestResult()
-        test.run(result)
-        self.assertEqual(len(result.errors), 1)
-        self.assertIn("Return value from test method ignored", result.errors[0][1])
-
-
-class SetUpTearDownTest(unittest.TestCase):
-    def test_set_up_tear_down(self):
-        """
-        This test makes sure that AsyncTestCase calls super methods for
-        setUp and tearDown.
-
-        InheritBoth is a subclass of both AsyncTestCase and
-        SetUpTearDown, with the ordering so that the super of
-        AsyncTestCase will be SetUpTearDown.
-        """
-        events = []
-        result = unittest.TestResult()
-
-        class SetUpTearDown(unittest.TestCase):
-            def setUp(self):
-                events.append("setUp")
-
-            def tearDown(self):
-                events.append("tearDown")
-
-        class InheritBoth(AsyncTestCase, SetUpTearDown):
-            def test(self):
-                events.append("test")
-
-        InheritBoth("test").run(result)
-        expected = ["setUp", "test", "tearDown"]
-        self.assertEqual(expected, events)
-
-
-class AsyncHTTPTestCaseSetUpTearDownTest(unittest.TestCase):
-    def test_tear_down_releases_app_and_http_server(self):
-        result = unittest.TestResult()
-
-        class SetUpTearDown(AsyncHTTPTestCase):
-            def get_app(self):
-                return Application()
-
-            def test(self):
-                self.assertTrue(hasattr(self, "_app"))
-                self.assertTrue(hasattr(self, "http_server"))
-
-        test = SetUpTearDown("test")
-        test.run(result)
-        self.assertFalse(hasattr(test, "_app"))
-        self.assertFalse(hasattr(test, "http_server"))
-
-
-class GenTest(AsyncTestCase):
-    def setUp(self):
-        super(GenTest, self).setUp()
-        self.finished = False
-
-    def tearDown(self):
-        self.assertTrue(self.finished)
-        super(GenTest, self).tearDown()
-
-    @gen_test
-    def test_sync(self):
-        self.finished = True
-
-    @gen_test
-    def test_async(self):
-        yield gen.moment
-        self.finished = True
-
-    def test_timeout(self):
-        # Set a short timeout and exceed it.
-        @gen_test(timeout=0.1)
-        def test(self):
-            yield gen.sleep(1)
-
-        # This can't use assertRaises because we need to inspect the
-        # exc_info triple (and not just the exception object)
-        try:
-            test(self)
-            self.fail("did not get expected exception")
-        except ioloop.TimeoutError:
-            # The stack trace should blame the add_timeout line, not just
-            # unrelated IOLoop/testing internals.
-            self.assertIn("gen.sleep(1)", traceback.format_exc())
-
-        self.finished = True
-
-    def test_no_timeout(self):
-        # A test that does not exceed its timeout should succeed.
-        @gen_test(timeout=1)
-        def test(self):
-            yield gen.sleep(0.1)
-
-        test(self)
-        self.finished = True
-
-    def test_timeout_environment_variable(self):
-        @gen_test(timeout=0.5)
-        def test_long_timeout(self):
-            yield gen.sleep(0.25)
-
-        # Uses provided timeout of 0.5 seconds, doesn't time out.
-        with set_environ("ASYNC_TEST_TIMEOUT", "0.1"):
-            test_long_timeout(self)
-
-        self.finished = True
-
-    def test_no_timeout_environment_variable(self):
-        @gen_test(timeout=0.01)
-        def test_short_timeout(self):
-            yield gen.sleep(1)
-
-        # Uses environment-variable timeout of 0.1, times out.
-        with set_environ("ASYNC_TEST_TIMEOUT", "0.1"):
-            with self.assertRaises(ioloop.TimeoutError):
-                test_short_timeout(self)
-
-        self.finished = True
-
-    def test_with_method_args(self):
-        @gen_test
-        def test_with_args(self, *args):
-            self.assertEqual(args, ("test",))
-            yield gen.moment
-
-        test_with_args(self, "test")
-        self.finished = True
-
-    def test_with_method_kwargs(self):
-        @gen_test
-        def test_with_kwargs(self, **kwargs):
-            self.assertDictEqual(kwargs, {"test": "test"})
-            yield gen.moment
-
-        test_with_kwargs(self, test="test")
-        self.finished = True
-
-    def test_native_coroutine(self):
-        @gen_test
-        async def test(self):
-            self.finished = True
-
-        test(self)
-
-    def test_native_coroutine_timeout(self):
-        # Set a short timeout and exceed it.
-        @gen_test(timeout=0.1)
-        async def test(self):
-            await gen.sleep(1)
-
-        try:
-            test(self)
-            self.fail("did not get expected exception")
-        except ioloop.TimeoutError:
-            self.finished = True
-
-
-class GetNewIOLoopTest(AsyncTestCase):
-    def get_new_ioloop(self):
-        # Use the current loop instead of creating a new one here.
-        return ioloop.IOLoop.current()
-
-    def setUp(self):
-        # This simulates the effect of an asyncio test harness like
-        # pytest-asyncio.
-        self.orig_loop = asyncio.get_event_loop()
-        self.new_loop = asyncio.new_event_loop()
-        asyncio.set_event_loop(self.new_loop)
-        super(GetNewIOLoopTest, self).setUp()
-
-    def tearDown(self):
-        super(GetNewIOLoopTest, self).tearDown()
-        # AsyncTestCase must not affect the existing asyncio loop.
-        self.assertFalse(asyncio.get_event_loop().is_closed())
-        asyncio.set_event_loop(self.orig_loop)
-        self.new_loop.close()
-
-    def test_loop(self):
-        self.assertIs(self.io_loop.asyncio_loop, self.new_loop)
-
-
-if __name__ == "__main__":
-    unittest.main()
diff --git a/venv/lib/python3.7/site-packages/tornado/test/twisted_test.py b/venv/lib/python3.7/site-packages/tornado/test/twisted_test.py
deleted file mode 100644
index 0e03cec..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/twisted_test.py
+++ /dev/null
@@ -1,236 +0,0 @@
-# Author: Ovidiu Predescu
-# Date: July 2011
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-import asyncio
-import logging
-import signal
-import unittest
-import warnings
-
-from tornado.escape import utf8
-from tornado import gen
-from tornado.httpclient import AsyncHTTPClient
-from tornado.httpserver import HTTPServer
-from tornado.ioloop import IOLoop
-from tornado.testing import bind_unused_port, AsyncTestCase, gen_test
-from tornado.web import RequestHandler, Application
-
-try:
-    from twisted.internet.defer import (  # type: ignore
-        Deferred,
-        inlineCallbacks,
-        returnValue,
-    )
-    from twisted.internet.protocol import Protocol  # type: ignore
-    from twisted.internet.asyncioreactor import AsyncioSelectorReactor  # type: ignore
-    from twisted.web.client import Agent, readBody  # type: ignore
-    from twisted.web.resource import Resource  # type: ignore
-    from twisted.web.server import Site  # type: ignore
-
-    have_twisted = True
-except ImportError:
-    have_twisted = False
-else:
-    # Not used directly but needed for `yield deferred` to work.
-    import tornado.platform.twisted  # noqa: F401
-
-skipIfNoTwisted = unittest.skipUnless(have_twisted, "twisted module not present")
-
-
-def save_signal_handlers():
-    saved = {}
-    for sig in [signal.SIGINT, signal.SIGTERM, signal.SIGCHLD]:
-        saved[sig] = signal.getsignal(sig)
-    if "twisted" in repr(saved):
-        # This indicates we're not cleaning up after ourselves properly.
-        raise Exception("twisted signal handlers already installed")
-    return saved
-
-
-def restore_signal_handlers(saved):
-    for sig, handler in saved.items():
-        signal.signal(sig, handler)
-
-
-# Test various combinations of twisted and tornado http servers,
-# http clients, and event loop interfaces.
-
-
-@skipIfNoTwisted
-class CompatibilityTests(unittest.TestCase):
-    def setUp(self):
-        self.saved_signals = save_signal_handlers()
-        self.io_loop = IOLoop()
-        self.io_loop.make_current()
-        self.reactor = AsyncioSelectorReactor()
-
-    def tearDown(self):
-        self.reactor.disconnectAll()
-        self.io_loop.clear_current()
-        self.io_loop.close(all_fds=True)
-        restore_signal_handlers(self.saved_signals)
-
-    def start_twisted_server(self):
-        class HelloResource(Resource):
-            isLeaf = True
-
-            def render_GET(self, request):
-                return b"Hello from twisted!"
-
-        site = Site(HelloResource())
-        port = self.reactor.listenTCP(0, site, interface="127.0.0.1")
-        self.twisted_port = port.getHost().port
-
-    def start_tornado_server(self):
-        class HelloHandler(RequestHandler):
-            def get(self):
-                self.write("Hello from tornado!")
-
-        app = Application([("/", HelloHandler)], log_function=lambda x: None)
-        server = HTTPServer(app)
-        sock, self.tornado_port = bind_unused_port()
-        server.add_sockets([sock])
-
-    def run_reactor(self):
-        # In theory, we can run the event loop through Tornado,
-        # Twisted, or asyncio interfaces. However, since we're trying
-        # to avoid installing anything as the global event loop, only
-        # the twisted interface gets everything wired up correectly
-        # without extra hacks. This method is a part of a
-        # no-longer-used generalization that allowed us to test
-        # different combinations.
-        self.stop_loop = self.reactor.stop
-        self.stop = self.reactor.stop
-        self.reactor.run()
-
-    def tornado_fetch(self, url, runner):
-        client = AsyncHTTPClient()
-        fut = asyncio.ensure_future(client.fetch(url))
-        fut.add_done_callback(lambda f: self.stop_loop())
-        runner()
-        return fut.result()
-
-    def twisted_fetch(self, url, runner):
-        # http://twistedmatrix.com/documents/current/web/howto/client.html
-        chunks = []
-        client = Agent(self.reactor)
-        d = client.request(b"GET", utf8(url))
-
-        class Accumulator(Protocol):
-            def __init__(self, finished):
-                self.finished = finished
-
-            def dataReceived(self, data):
-                chunks.append(data)
-
-            def connectionLost(self, reason):
-                self.finished.callback(None)
-
-        def callback(response):
-            finished = Deferred()
-            response.deliverBody(Accumulator(finished))
-            return finished
-
-        d.addCallback(callback)
-
-        def shutdown(failure):
-            if hasattr(self, "stop_loop"):
-                self.stop_loop()
-            elif failure is not None:
-                # loop hasn't been initialized yet; try our best to
-                # get an error message out. (the runner() interaction
-                # should probably be refactored).
-                try:
-                    failure.raiseException()
-                except:
-                    logging.error("exception before starting loop", exc_info=True)
-
-        d.addBoth(shutdown)
-        runner()
-        self.assertTrue(chunks)
-        return b"".join(chunks)
-
-    def twisted_coroutine_fetch(self, url, runner):
-        body = [None]
-
-        @gen.coroutine
-        def f():
-            # This is simpler than the non-coroutine version, but it cheats
-            # by reading the body in one blob instead of streaming it with
-            # a Protocol.
-            client = Agent(self.reactor)
-            response = yield client.request(b"GET", utf8(url))
-            with warnings.catch_warnings():
-                # readBody has a buggy DeprecationWarning in Twisted 15.0:
-                # https://twistedmatrix.com/trac/changeset/43379
-                warnings.simplefilter("ignore", category=DeprecationWarning)
-                body[0] = yield readBody(response)
-            self.stop_loop()
-
-        self.io_loop.add_callback(f)
-        runner()
-        return body[0]
-
-    def testTwistedServerTornadoClientReactor(self):
-        self.start_twisted_server()
-        response = self.tornado_fetch(
-            "http://127.0.0.1:%d" % self.twisted_port, self.run_reactor
-        )
-        self.assertEqual(response.body, b"Hello from twisted!")
-
-    def testTornadoServerTwistedClientReactor(self):
-        self.start_tornado_server()
-        response = self.twisted_fetch(
-            "http://127.0.0.1:%d" % self.tornado_port, self.run_reactor
-        )
-        self.assertEqual(response, b"Hello from tornado!")
-
-    def testTornadoServerTwistedCoroutineClientReactor(self):
-        self.start_tornado_server()
-        response = self.twisted_coroutine_fetch(
-            "http://127.0.0.1:%d" % self.tornado_port, self.run_reactor
-        )
-        self.assertEqual(response, b"Hello from tornado!")
-
-
-@skipIfNoTwisted
-class ConvertDeferredTest(AsyncTestCase):
-    @gen_test
-    def test_success(self):
-        @inlineCallbacks
-        def fn():
-            if False:
-                # inlineCallbacks doesn't work with regular functions;
-                # must have a yield even if it's unreachable.
-                yield
-            returnValue(42)
-
-        res = yield fn()
-        self.assertEqual(res, 42)
-
-    @gen_test
-    def test_failure(self):
-        @inlineCallbacks
-        def fn():
-            if False:
-                yield
-            1 / 0
-
-        with self.assertRaises(ZeroDivisionError):
-            yield fn()
-
-
-if __name__ == "__main__":
-    unittest.main()
diff --git a/venv/lib/python3.7/site-packages/tornado/test/util.py b/venv/lib/python3.7/site-packages/tornado/test/util.py
deleted file mode 100644
index bcb9bbd..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/util.py
+++ /dev/null
@@ -1,114 +0,0 @@
-import contextlib
-import os
-import platform
-import socket
-import sys
-import textwrap
-import typing  # noqa: F401
-import unittest
-import warnings
-
-from tornado.testing import bind_unused_port
-
-skipIfNonUnix = unittest.skipIf(
-    os.name != "posix" or sys.platform == "cygwin", "non-unix platform"
-)
-
-# travis-ci.org runs our tests in an overworked virtual machine, which makes
-# timing-related tests unreliable.
-skipOnTravis = unittest.skipIf(
-    "TRAVIS" in os.environ, "timing tests unreliable on travis"
-)
-
-# Set the environment variable NO_NETWORK=1 to disable any tests that
-# depend on an external network.
-skipIfNoNetwork = unittest.skipIf("NO_NETWORK" in os.environ, "network access disabled")
-
-skipNotCPython = unittest.skipIf(
-    platform.python_implementation() != "CPython", "Not CPython implementation"
-)
-
-# Used for tests affected by
-# https://bitbucket.org/pypy/pypy/issues/2616/incomplete-error-handling-in
-# TODO: remove this after pypy3 5.8 is obsolete.
-skipPypy3V58 = unittest.skipIf(
-    platform.python_implementation() == "PyPy"
-    and sys.version_info > (3,)
-    and sys.pypy_version_info < (5, 9),  # type: ignore
-    "pypy3 5.8 has buggy ssl module",
-)
-
-
-def _detect_ipv6():
-    if not socket.has_ipv6:
-        # socket.has_ipv6 check reports whether ipv6 was present at compile
-        # time. It's usually true even when ipv6 doesn't work for other reasons.
-        return False
-    sock = None
-    try:
-        sock = socket.socket(socket.AF_INET6)
-        sock.bind(("::1", 0))
-    except socket.error:
-        return False
-    finally:
-        if sock is not None:
-            sock.close()
-    return True
-
-
-skipIfNoIPv6 = unittest.skipIf(not _detect_ipv6(), "ipv6 support not present")
-
-
-def refusing_port():
-    """Returns a local port number that will refuse all connections.
-
-    Return value is (cleanup_func, port); the cleanup function
-    must be called to free the port to be reused.
-    """
-    # On travis-ci, port numbers are reassigned frequently. To avoid
-    # collisions with other tests, we use an open client-side socket's
-    # ephemeral port number to ensure that nothing can listen on that
-    # port.
-    server_socket, port = bind_unused_port()
-    server_socket.setblocking(True)
-    client_socket = socket.socket()
-    client_socket.connect(("127.0.0.1", port))
-    conn, client_addr = server_socket.accept()
-    conn.close()
-    server_socket.close()
-    return (client_socket.close, client_addr[1])
-
-
-def exec_test(caller_globals, caller_locals, s):
-    """Execute ``s`` in a given context and return the result namespace.
-
-    Used to define functions for tests in particular python
-    versions that would be syntax errors in older versions.
-    """
-    # Flatten the real global and local namespace into our fake
-    # globals: it's all global from the perspective of code defined
-    # in s.
-    global_namespace = dict(caller_globals, **caller_locals)  # type: ignore
-    local_namespace = {}  # type: typing.Dict[str, typing.Any]
-    exec(textwrap.dedent(s), global_namespace, local_namespace)
-    return local_namespace
-
-
-def subTest(test, *args, **kwargs):
-    """Compatibility shim for unittest.TestCase.subTest.
-
-    Usage: ``with tornado.test.util.subTest(self, x=x):``
-    """
-    try:
-        subTest = test.subTest  # py34+
-    except AttributeError:
-        subTest = contextlib.contextmanager(lambda *a, **kw: (yield))
-    return subTest(*args, **kwargs)
-
-
-@contextlib.contextmanager
-def ignore_deprecation():
-    """Context manager to ignore deprecation warnings."""
-    with warnings.catch_warnings():
-        warnings.simplefilter("ignore", DeprecationWarning)
-        yield
diff --git a/venv/lib/python3.7/site-packages/tornado/test/util_test.py b/venv/lib/python3.7/site-packages/tornado/test/util_test.py
deleted file mode 100644
index 8ecd351..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/util_test.py
+++ /dev/null
@@ -1,309 +0,0 @@
-# coding: utf-8
-from io import StringIO
-import re
-import sys
-import datetime
-import unittest
-
-import tornado.escape
-from tornado.escape import utf8
-from tornado.util import (
-    raise_exc_info,
-    Configurable,
-    exec_in,
-    ArgReplacer,
-    timedelta_to_seconds,
-    import_object,
-    re_unescape,
-    is_finalizing,
-)
-
-import typing
-from typing import cast
-
-if typing.TYPE_CHECKING:
-    from typing import Dict, Any  # noqa: F401
-
-
-class RaiseExcInfoTest(unittest.TestCase):
-    def test_two_arg_exception(self):
-        # This test would fail on python 3 if raise_exc_info were simply
-        # a three-argument raise statement, because TwoArgException
-        # doesn't have a "copy constructor"
-        class TwoArgException(Exception):
-            def __init__(self, a, b):
-                super(TwoArgException, self).__init__()
-                self.a, self.b = a, b
-
-        try:
-            raise TwoArgException(1, 2)
-        except TwoArgException:
-            exc_info = sys.exc_info()
-        try:
-            raise_exc_info(exc_info)
-            self.fail("didn't get expected exception")
-        except TwoArgException as e:
-            self.assertIs(e, exc_info[1])
-
-
-class TestConfigurable(Configurable):
-    @classmethod
-    def configurable_base(cls):
-        return TestConfigurable
-
-    @classmethod
-    def configurable_default(cls):
-        return TestConfig1
-
-
-class TestConfig1(TestConfigurable):
-    def initialize(self, pos_arg=None, a=None):
-        self.a = a
-        self.pos_arg = pos_arg
-
-
-class TestConfig2(TestConfigurable):
-    def initialize(self, pos_arg=None, b=None):
-        self.b = b
-        self.pos_arg = pos_arg
-
-
-class TestConfig3(TestConfigurable):
-    # TestConfig3 is a configuration option that is itself configurable.
-    @classmethod
-    def configurable_base(cls):
-        return TestConfig3
-
-    @classmethod
-    def configurable_default(cls):
-        return TestConfig3A
-
-
-class TestConfig3A(TestConfig3):
-    def initialize(self, a=None):
-        self.a = a
-
-
-class TestConfig3B(TestConfig3):
-    def initialize(self, b=None):
-        self.b = b
-
-
-class ConfigurableTest(unittest.TestCase):
-    def setUp(self):
-        self.saved = TestConfigurable._save_configuration()
-        self.saved3 = TestConfig3._save_configuration()
-
-    def tearDown(self):
-        TestConfigurable._restore_configuration(self.saved)
-        TestConfig3._restore_configuration(self.saved3)
-
-    def checkSubclasses(self):
-        # no matter how the class is configured, it should always be
-        # possible to instantiate the subclasses directly
-        self.assertIsInstance(TestConfig1(), TestConfig1)
-        self.assertIsInstance(TestConfig2(), TestConfig2)
-
-        obj = TestConfig1(a=1)
-        self.assertEqual(obj.a, 1)
-        obj2 = TestConfig2(b=2)
-        self.assertEqual(obj2.b, 2)
-
-    def test_default(self):
-        # In these tests we combine a typing.cast to satisfy mypy with
-        # a runtime type-assertion. Without the cast, mypy would only
-        # let us access attributes of the base class.
-        obj = cast(TestConfig1, TestConfigurable())
-        self.assertIsInstance(obj, TestConfig1)
-        self.assertIs(obj.a, None)
-
-        obj = cast(TestConfig1, TestConfigurable(a=1))
-        self.assertIsInstance(obj, TestConfig1)
-        self.assertEqual(obj.a, 1)
-
-        self.checkSubclasses()
-
-    def test_config_class(self):
-        TestConfigurable.configure(TestConfig2)
-        obj = cast(TestConfig2, TestConfigurable())
-        self.assertIsInstance(obj, TestConfig2)
-        self.assertIs(obj.b, None)
-
-        obj = cast(TestConfig2, TestConfigurable(b=2))
-        self.assertIsInstance(obj, TestConfig2)
-        self.assertEqual(obj.b, 2)
-
-        self.checkSubclasses()
-
-    def test_config_str(self):
-        TestConfigurable.configure("tornado.test.util_test.TestConfig2")
-        obj = cast(TestConfig2, TestConfigurable())
-        self.assertIsInstance(obj, TestConfig2)
-        self.assertIs(obj.b, None)
-
-        obj = cast(TestConfig2, TestConfigurable(b=2))
-        self.assertIsInstance(obj, TestConfig2)
-        self.assertEqual(obj.b, 2)
-
-        self.checkSubclasses()
-
-    def test_config_args(self):
-        TestConfigurable.configure(None, a=3)
-        obj = cast(TestConfig1, TestConfigurable())
-        self.assertIsInstance(obj, TestConfig1)
-        self.assertEqual(obj.a, 3)
-
-        obj = cast(TestConfig1, TestConfigurable(42, a=4))
-        self.assertIsInstance(obj, TestConfig1)
-        self.assertEqual(obj.a, 4)
-        self.assertEqual(obj.pos_arg, 42)
-
-        self.checkSubclasses()
-        # args bound in configure don't apply when using the subclass directly
-        obj = TestConfig1()
-        self.assertIs(obj.a, None)
-
-    def test_config_class_args(self):
-        TestConfigurable.configure(TestConfig2, b=5)
-        obj = cast(TestConfig2, TestConfigurable())
-        self.assertIsInstance(obj, TestConfig2)
-        self.assertEqual(obj.b, 5)
-
-        obj = cast(TestConfig2, TestConfigurable(42, b=6))
-        self.assertIsInstance(obj, TestConfig2)
-        self.assertEqual(obj.b, 6)
-        self.assertEqual(obj.pos_arg, 42)
-
-        self.checkSubclasses()
-        # args bound in configure don't apply when using the subclass directly
-        obj = TestConfig2()
-        self.assertIs(obj.b, None)
-
-    def test_config_multi_level(self):
-        TestConfigurable.configure(TestConfig3, a=1)
-        obj = cast(TestConfig3A, TestConfigurable())
-        self.assertIsInstance(obj, TestConfig3A)
-        self.assertEqual(obj.a, 1)
-
-        TestConfigurable.configure(TestConfig3)
-        TestConfig3.configure(TestConfig3B, b=2)
-        obj2 = cast(TestConfig3B, TestConfigurable())
-        self.assertIsInstance(obj2, TestConfig3B)
-        self.assertEqual(obj2.b, 2)
-
-    def test_config_inner_level(self):
-        # The inner level can be used even when the outer level
-        # doesn't point to it.
-        obj = TestConfig3()
-        self.assertIsInstance(obj, TestConfig3A)
-
-        TestConfig3.configure(TestConfig3B)
-        obj = TestConfig3()
-        self.assertIsInstance(obj, TestConfig3B)
-
-        # Configuring the base doesn't configure the inner.
-        obj2 = TestConfigurable()
-        self.assertIsInstance(obj2, TestConfig1)
-        TestConfigurable.configure(TestConfig2)
-
-        obj3 = TestConfigurable()
-        self.assertIsInstance(obj3, TestConfig2)
-
-        obj = TestConfig3()
-        self.assertIsInstance(obj, TestConfig3B)
-
-
-class UnicodeLiteralTest(unittest.TestCase):
-    def test_unicode_escapes(self):
-        self.assertEqual(utf8(u"\u00e9"), b"\xc3\xa9")
-
-
-class ExecInTest(unittest.TestCase):
-    # TODO(bdarnell): make a version of this test for one of the new
-    # future imports available in python 3.
-    @unittest.skip("no testable future imports")
-    def test_no_inherit_future(self):
-        # This file has from __future__ import print_function...
-        f = StringIO()
-        print("hello", file=f)
-        # ...but the template doesn't
-        exec_in('print >> f, "world"', dict(f=f))
-        self.assertEqual(f.getvalue(), "hello\nworld\n")
-
-
-class ArgReplacerTest(unittest.TestCase):
-    def setUp(self):
-        def function(x, y, callback=None, z=None):
-            pass
-
-        self.replacer = ArgReplacer(function, "callback")
-
-    def test_omitted(self):
-        args = (1, 2)
-        kwargs = dict()  # type: Dict[str, Any]
-        self.assertIs(self.replacer.get_old_value(args, kwargs), None)
-        self.assertEqual(
-            self.replacer.replace("new", args, kwargs),
-            (None, (1, 2), dict(callback="new")),
-        )
-
-    def test_position(self):
-        args = (1, 2, "old", 3)
-        kwargs = dict()  # type: Dict[str, Any]
-        self.assertEqual(self.replacer.get_old_value(args, kwargs), "old")
-        self.assertEqual(
-            self.replacer.replace("new", args, kwargs),
-            ("old", [1, 2, "new", 3], dict()),
-        )
-
-    def test_keyword(self):
-        args = (1,)
-        kwargs = dict(y=2, callback="old", z=3)
-        self.assertEqual(self.replacer.get_old_value(args, kwargs), "old")
-        self.assertEqual(
-            self.replacer.replace("new", args, kwargs),
-            ("old", (1,), dict(y=2, callback="new", z=3)),
-        )
-
-
-class TimedeltaToSecondsTest(unittest.TestCase):
-    def test_timedelta_to_seconds(self):
-        time_delta = datetime.timedelta(hours=1)
-        self.assertEqual(timedelta_to_seconds(time_delta), 3600.0)
-
-
-class ImportObjectTest(unittest.TestCase):
-    def test_import_member(self):
-        self.assertIs(import_object("tornado.escape.utf8"), utf8)
-
-    def test_import_member_unicode(self):
-        self.assertIs(import_object(u"tornado.escape.utf8"), utf8)
-
-    def test_import_module(self):
-        self.assertIs(import_object("tornado.escape"), tornado.escape)
-
-    def test_import_module_unicode(self):
-        # The internal implementation of __import__ differs depending on
-        # whether the thing being imported is a module or not.
-        # This variant requires a byte string in python 2.
-        self.assertIs(import_object(u"tornado.escape"), tornado.escape)
-
-
-class ReUnescapeTest(unittest.TestCase):
-    def test_re_unescape(self):
-        test_strings = ("/favicon.ico", "index.html", "Hello, World!", "!$@#%;")
-        for string in test_strings:
-            self.assertEqual(string, re_unescape(re.escape(string)))
-
-    def test_re_unescape_raises_error_on_invalid_input(self):
-        with self.assertRaises(ValueError):
-            re_unescape("\\d")
-        with self.assertRaises(ValueError):
-            re_unescape("\\b")
-        with self.assertRaises(ValueError):
-            re_unescape("\\Z")
-
-
-class IsFinalizingTest(unittest.TestCase):
-    def test_basic(self):
-        self.assertFalse(is_finalizing())
diff --git a/venv/lib/python3.7/site-packages/tornado/test/web_test.py b/venv/lib/python3.7/site-packages/tornado/test/web_test.py
deleted file mode 100644
index d43d46b..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/web_test.py
+++ /dev/null
@@ -1,3138 +0,0 @@
-from tornado.concurrent import Future
-from tornado import gen
-from tornado.escape import (
-    json_decode,
-    utf8,
-    to_unicode,
-    recursive_unicode,
-    native_str,
-    to_basestring,
-)
-from tornado.httpclient import HTTPClientError
-from tornado.httputil import format_timestamp
-from tornado.iostream import IOStream
-from tornado import locale
-from tornado.locks import Event
-from tornado.log import app_log, gen_log
-from tornado.simple_httpclient import SimpleAsyncHTTPClient
-from tornado.template import DictLoader
-from tornado.testing import AsyncHTTPTestCase, AsyncTestCase, ExpectLog, gen_test
-from tornado.util import ObjectDict, unicode_type
-from tornado.web import (
-    Application,
-    RequestHandler,
-    StaticFileHandler,
-    RedirectHandler as WebRedirectHandler,
-    HTTPError,
-    MissingArgumentError,
-    ErrorHandler,
-    authenticated,
-    url,
-    _create_signature_v1,
-    create_signed_value,
-    decode_signed_value,
-    get_signature_key_version,
-    UIModule,
-    Finish,
-    stream_request_body,
-    removeslash,
-    addslash,
-    GZipContentEncoding,
-)
-
-import binascii
-import contextlib
-import copy
-import datetime
-import email.utils
-import gzip
-from io import BytesIO
-import itertools
-import logging
-import os
-import re
-import socket
-import typing  # noqa: F401
-import unittest
-import urllib.parse
-
-
-def relpath(*a):
-    return os.path.join(os.path.dirname(__file__), *a)
-
-
-class WebTestCase(AsyncHTTPTestCase):
-    """Base class for web tests that also supports WSGI mode.
-
-    Override get_handlers and get_app_kwargs instead of get_app.
-    This class is deprecated since WSGI mode is no longer supported.
-    """
-
-    def get_app(self):
-        self.app = Application(self.get_handlers(), **self.get_app_kwargs())
-        return self.app
-
-    def get_handlers(self):
-        raise NotImplementedError()
-
-    def get_app_kwargs(self):
-        return {}
-
-
-class SimpleHandlerTestCase(WebTestCase):
-    """Simplified base class for tests that work with a single handler class.
-
-    To use, define a nested class named ``Handler``.
-    """
-
-    def get_handlers(self):
-        return [("/", self.Handler)]
-
-
-class HelloHandler(RequestHandler):
-    def get(self):
-        self.write("hello")
-
-
-class CookieTestRequestHandler(RequestHandler):
-    # stub out enough methods to make the secure_cookie functions work
-    def __init__(self, cookie_secret="0123456789", key_version=None):
-        # don't call super.__init__
-        self._cookies = {}  # type: typing.Dict[str, bytes]
-        if key_version is None:
-            self.application = ObjectDict(settings=dict(cookie_secret=cookie_secret))
-        else:
-            self.application = ObjectDict(
-                settings=dict(cookie_secret=cookie_secret, key_version=key_version)
-            )
-
-    def get_cookie(self, name):
-        return self._cookies.get(name)
-
-    def set_cookie(self, name, value, expires_days=None):
-        self._cookies[name] = value
-
-
-# See SignedValueTest below for more.
-class SecureCookieV1Test(unittest.TestCase):
-    def test_round_trip(self):
-        handler = CookieTestRequestHandler()
-        handler.set_secure_cookie("foo", b"bar", version=1)
-        self.assertEqual(handler.get_secure_cookie("foo", min_version=1), b"bar")
-
-    def test_cookie_tampering_future_timestamp(self):
-        handler = CookieTestRequestHandler()
-        # this string base64-encodes to '12345678'
-        handler.set_secure_cookie("foo", binascii.a2b_hex(b"d76df8e7aefc"), version=1)
-        cookie = handler._cookies["foo"]
-        match = re.match(br"12345678\|([0-9]+)\|([0-9a-f]+)", cookie)
-        assert match is not None
-        timestamp = match.group(1)
-        sig = match.group(2)
-        self.assertEqual(
-            _create_signature_v1(
-                handler.application.settings["cookie_secret"],
-                "foo",
-                "12345678",
-                timestamp,
-            ),
-            sig,
-        )
-        # shifting digits from payload to timestamp doesn't alter signature
-        # (this is not desirable behavior, just confirming that that's how it
-        # works)
-        self.assertEqual(
-            _create_signature_v1(
-                handler.application.settings["cookie_secret"],
-                "foo",
-                "1234",
-                b"5678" + timestamp,
-            ),
-            sig,
-        )
-        # tamper with the cookie
-        handler._cookies["foo"] = utf8(
-            "1234|5678%s|%s" % (to_basestring(timestamp), to_basestring(sig))
-        )
-        # it gets rejected
-        with ExpectLog(gen_log, "Cookie timestamp in future"):
-            self.assertTrue(handler.get_secure_cookie("foo", min_version=1) is None)
-
-    def test_arbitrary_bytes(self):
-        # Secure cookies accept arbitrary data (which is base64 encoded).
-        # Note that normal cookies accept only a subset of ascii.
-        handler = CookieTestRequestHandler()
-        handler.set_secure_cookie("foo", b"\xe9", version=1)
-        self.assertEqual(handler.get_secure_cookie("foo", min_version=1), b"\xe9")
-
-
-# See SignedValueTest below for more.
-class SecureCookieV2Test(unittest.TestCase):
-    KEY_VERSIONS = {0: "ajklasdf0ojaisdf", 1: "aslkjasaolwkjsdf"}
-
-    def test_round_trip(self):
-        handler = CookieTestRequestHandler()
-        handler.set_secure_cookie("foo", b"bar", version=2)
-        self.assertEqual(handler.get_secure_cookie("foo", min_version=2), b"bar")
-
-    def test_key_version_roundtrip(self):
-        handler = CookieTestRequestHandler(
-            cookie_secret=self.KEY_VERSIONS, key_version=0
-        )
-        handler.set_secure_cookie("foo", b"bar")
-        self.assertEqual(handler.get_secure_cookie("foo"), b"bar")
-
-    def test_key_version_roundtrip_differing_version(self):
-        handler = CookieTestRequestHandler(
-            cookie_secret=self.KEY_VERSIONS, key_version=1
-        )
-        handler.set_secure_cookie("foo", b"bar")
-        self.assertEqual(handler.get_secure_cookie("foo"), b"bar")
-
-    def test_key_version_increment_version(self):
-        handler = CookieTestRequestHandler(
-            cookie_secret=self.KEY_VERSIONS, key_version=0
-        )
-        handler.set_secure_cookie("foo", b"bar")
-        new_handler = CookieTestRequestHandler(
-            cookie_secret=self.KEY_VERSIONS, key_version=1
-        )
-        new_handler._cookies = handler._cookies
-        self.assertEqual(new_handler.get_secure_cookie("foo"), b"bar")
-
-    def test_key_version_invalidate_version(self):
-        handler = CookieTestRequestHandler(
-            cookie_secret=self.KEY_VERSIONS, key_version=0
-        )
-        handler.set_secure_cookie("foo", b"bar")
-        new_key_versions = self.KEY_VERSIONS.copy()
-        new_key_versions.pop(0)
-        new_handler = CookieTestRequestHandler(
-            cookie_secret=new_key_versions, key_version=1
-        )
-        new_handler._cookies = handler._cookies
-        self.assertEqual(new_handler.get_secure_cookie("foo"), None)
-
-
-class FinalReturnTest(WebTestCase):
-    def get_handlers(self):
-        test = self
-
-        class FinishHandler(RequestHandler):
-            @gen.coroutine
-            def get(self):
-                test.final_return = self.finish()
-                yield test.final_return
-
-            @gen.coroutine
-            def post(self):
-                self.write("hello,")
-                yield self.flush()
-                test.final_return = self.finish("world")
-                yield test.final_return
-
-        class RenderHandler(RequestHandler):
-            def create_template_loader(self, path):
-                return DictLoader({"foo.html": "hi"})
-
-            @gen.coroutine
-            def get(self):
-                test.final_return = self.render("foo.html")
-
-        return [("/finish", FinishHandler), ("/render", RenderHandler)]
-
-    def get_app_kwargs(self):
-        return dict(template_path="FinalReturnTest")
-
-    def test_finish_method_return_future(self):
-        response = self.fetch(self.get_url("/finish"))
-        self.assertEqual(response.code, 200)
-        self.assertIsInstance(self.final_return, Future)
-        self.assertTrue(self.final_return.done())
-
-        response = self.fetch(self.get_url("/finish"), method="POST", body=b"")
-        self.assertEqual(response.code, 200)
-        self.assertIsInstance(self.final_return, Future)
-        self.assertTrue(self.final_return.done())
-
-    def test_render_method_return_future(self):
-        response = self.fetch(self.get_url("/render"))
-        self.assertEqual(response.code, 200)
-        self.assertIsInstance(self.final_return, Future)
-
-
-class CookieTest(WebTestCase):
-    def get_handlers(self):
-        class SetCookieHandler(RequestHandler):
-            def get(self):
-                # Try setting cookies with different argument types
-                # to ensure that everything gets encoded correctly
-                self.set_cookie("str", "asdf")
-                self.set_cookie("unicode", u"qwer")
-                self.set_cookie("bytes", b"zxcv")
-
-        class GetCookieHandler(RequestHandler):
-            def get(self):
-                self.write(self.get_cookie("foo", "default"))
-
-        class SetCookieDomainHandler(RequestHandler):
-            def get(self):
-                # unicode domain and path arguments shouldn't break things
-                # either (see bug #285)
-                self.set_cookie("unicode_args", "blah", domain=u"foo.com", path=u"/foo")
-
-        class SetCookieSpecialCharHandler(RequestHandler):
-            def get(self):
-                self.set_cookie("equals", "a=b")
-                self.set_cookie("semicolon", "a;b")
-                self.set_cookie("quote", 'a"b')
-
-        class SetCookieOverwriteHandler(RequestHandler):
-            def get(self):
-                self.set_cookie("a", "b", domain="example.com")
-                self.set_cookie("c", "d", domain="example.com")
-                # A second call with the same name clobbers the first.
-                # Attributes from the first call are not carried over.
-                self.set_cookie("a", "e")
-
-        class SetCookieMaxAgeHandler(RequestHandler):
-            def get(self):
-                self.set_cookie("foo", "bar", max_age=10)
-
-        class SetCookieExpiresDaysHandler(RequestHandler):
-            def get(self):
-                self.set_cookie("foo", "bar", expires_days=10)
-
-        class SetCookieFalsyFlags(RequestHandler):
-            def get(self):
-                self.set_cookie("a", "1", secure=True)
-                self.set_cookie("b", "1", secure=False)
-                self.set_cookie("c", "1", httponly=True)
-                self.set_cookie("d", "1", httponly=False)
-
-        return [
-            ("/set", SetCookieHandler),
-            ("/get", GetCookieHandler),
-            ("/set_domain", SetCookieDomainHandler),
-            ("/special_char", SetCookieSpecialCharHandler),
-            ("/set_overwrite", SetCookieOverwriteHandler),
-            ("/set_max_age", SetCookieMaxAgeHandler),
-            ("/set_expires_days", SetCookieExpiresDaysHandler),
-            ("/set_falsy_flags", SetCookieFalsyFlags),
-        ]
-
-    def test_set_cookie(self):
-        response = self.fetch("/set")
-        self.assertEqual(
-            sorted(response.headers.get_list("Set-Cookie")),
-            ["bytes=zxcv; Path=/", "str=asdf; Path=/", "unicode=qwer; Path=/"],
-        )
-
-    def test_get_cookie(self):
-        response = self.fetch("/get", headers={"Cookie": "foo=bar"})
-        self.assertEqual(response.body, b"bar")
-
-        response = self.fetch("/get", headers={"Cookie": 'foo="bar"'})
-        self.assertEqual(response.body, b"bar")
-
-        response = self.fetch("/get", headers={"Cookie": "/=exception;"})
-        self.assertEqual(response.body, b"default")
-
-    def test_set_cookie_domain(self):
-        response = self.fetch("/set_domain")
-        self.assertEqual(
-            response.headers.get_list("Set-Cookie"),
-            ["unicode_args=blah; Domain=foo.com; Path=/foo"],
-        )
-
-    def test_cookie_special_char(self):
-        response = self.fetch("/special_char")
-        headers = sorted(response.headers.get_list("Set-Cookie"))
-        self.assertEqual(len(headers), 3)
-        self.assertEqual(headers[0], 'equals="a=b"; Path=/')
-        self.assertEqual(headers[1], 'quote="a\\"b"; Path=/')
-        # python 2.7 octal-escapes the semicolon; older versions leave it alone
-        self.assertTrue(
-            headers[2] in ('semicolon="a;b"; Path=/', 'semicolon="a\\073b"; Path=/'),
-            headers[2],
-        )
-
-        data = [
-            ("foo=a=b", "a=b"),
-            ('foo="a=b"', "a=b"),
-            ('foo="a;b"', '"a'),  # even quoted, ";" is a delimiter
-            ("foo=a\\073b", "a\\073b"),  # escapes only decoded in quotes
-            ('foo="a\\073b"', "a;b"),
-            ('foo="a\\"b"', 'a"b'),
-        ]
-        for header, expected in data:
-            logging.debug("trying %r", header)
-            response = self.fetch("/get", headers={"Cookie": header})
-            self.assertEqual(response.body, utf8(expected))
-
-    def test_set_cookie_overwrite(self):
-        response = self.fetch("/set_overwrite")
-        headers = response.headers.get_list("Set-Cookie")
-        self.assertEqual(
-            sorted(headers), ["a=e; Path=/", "c=d; Domain=example.com; Path=/"]
-        )
-
-    def test_set_cookie_max_age(self):
-        response = self.fetch("/set_max_age")
-        headers = response.headers.get_list("Set-Cookie")
-        self.assertEqual(sorted(headers), ["foo=bar; Max-Age=10; Path=/"])
-
-    def test_set_cookie_expires_days(self):
-        response = self.fetch("/set_expires_days")
-        header = response.headers.get("Set-Cookie")
-        match = re.match("foo=bar; expires=(?P<expires>.+); Path=/", header)
-        assert match is not None
-
-        expires = datetime.datetime.utcnow() + datetime.timedelta(days=10)
-        parsed = email.utils.parsedate(match.groupdict()["expires"])
-        assert parsed is not None
-        header_expires = datetime.datetime(*parsed[:6])
-        self.assertTrue(abs((expires - header_expires).total_seconds()) < 10)
-
-    def test_set_cookie_false_flags(self):
-        response = self.fetch("/set_falsy_flags")
-        headers = sorted(response.headers.get_list("Set-Cookie"))
-        # The secure and httponly headers are capitalized in py35 and
-        # lowercase in older versions.
-        self.assertEqual(headers[0].lower(), "a=1; path=/; secure")
-        self.assertEqual(headers[1].lower(), "b=1; path=/")
-        self.assertEqual(headers[2].lower(), "c=1; httponly; path=/")
-        self.assertEqual(headers[3].lower(), "d=1; path=/")
-
-
-class AuthRedirectRequestHandler(RequestHandler):
-    def initialize(self, login_url):
-        self.login_url = login_url
-
-    def get_login_url(self):
-        return self.login_url
-
-    @authenticated
-    def get(self):
-        # we'll never actually get here because the test doesn't follow redirects
-        self.send_error(500)
-
-
-class AuthRedirectTest(WebTestCase):
-    def get_handlers(self):
-        return [
-            ("/relative", AuthRedirectRequestHandler, dict(login_url="/login")),
-            (
-                "/absolute",
-                AuthRedirectRequestHandler,
-                dict(login_url="http://example.com/login"),
-            ),
-        ]
-
-    def test_relative_auth_redirect(self):
-        response = self.fetch(self.get_url("/relative"), follow_redirects=False)
-        self.assertEqual(response.code, 302)
-        self.assertEqual(response.headers["Location"], "/login?next=%2Frelative")
-
-    def test_absolute_auth_redirect(self):
-        response = self.fetch(self.get_url("/absolute"), follow_redirects=False)
-        self.assertEqual(response.code, 302)
-        self.assertTrue(
-            re.match(
-                r"http://example.com/login\?next=http%3A%2F%2F127.0.0.1%3A[0-9]+%2Fabsolute",
-                response.headers["Location"],
-            ),
-            response.headers["Location"],
-        )
-
-
-class ConnectionCloseHandler(RequestHandler):
-    def initialize(self, test):
-        self.test = test
-
-    @gen.coroutine
-    def get(self):
-        self.test.on_handler_waiting()
-        yield self.test.cleanup_event.wait()
-
-    def on_connection_close(self):
-        self.test.on_connection_close()
-
-
-class ConnectionCloseTest(WebTestCase):
-    def get_handlers(self):
-        self.cleanup_event = Event()
-        return [("/", ConnectionCloseHandler, dict(test=self))]
-
-    def test_connection_close(self):
-        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0)
-        s.connect(("127.0.0.1", self.get_http_port()))
-        self.stream = IOStream(s)
-        self.stream.write(b"GET / HTTP/1.0\r\n\r\n")
-        self.wait()
-        # Let the hanging coroutine clean up after itself
-        self.cleanup_event.set()
-        self.io_loop.run_sync(lambda: gen.sleep(0))
-
-    def on_handler_waiting(self):
-        logging.debug("handler waiting")
-        self.stream.close()
-
-    def on_connection_close(self):
-        logging.debug("connection closed")
-        self.stop()
-
-
-class EchoHandler(RequestHandler):
-    def get(self, *path_args):
-        # Type checks: web.py interfaces convert argument values to
-        # unicode strings (by default, but see also decode_argument).
-        # In httpserver.py (i.e. self.request.arguments), they're left
-        # as bytes.  Keys are always native strings.
-        for key in self.request.arguments:
-            if type(key) != str:
-                raise Exception("incorrect type for key: %r" % type(key))
-            for value in self.request.arguments[key]:
-                if type(value) != bytes:
-                    raise Exception("incorrect type for value: %r" % type(value))
-            for value in self.get_arguments(key):
-                if type(value) != unicode_type:
-                    raise Exception("incorrect type for value: %r" % type(value))
-        for arg in path_args:
-            if type(arg) != unicode_type:
-                raise Exception("incorrect type for path arg: %r" % type(arg))
-        self.write(
-            dict(
-                path=self.request.path,
-                path_args=path_args,
-                args=recursive_unicode(self.request.arguments),
-            )
-        )
-
-
-class RequestEncodingTest(WebTestCase):
-    def get_handlers(self):
-        return [("/group/(.*)", EchoHandler), ("/slashes/([^/]*)/([^/]*)", EchoHandler)]
-
-    def fetch_json(self, path):
-        return json_decode(self.fetch(path).body)
-
-    def test_group_question_mark(self):
-        # Ensure that url-encoded question marks are handled properly
-        self.assertEqual(
-            self.fetch_json("/group/%3F"),
-            dict(path="/group/%3F", path_args=["?"], args={}),
-        )
-        self.assertEqual(
-            self.fetch_json("/group/%3F?%3F=%3F"),
-            dict(path="/group/%3F", path_args=["?"], args={"?": ["?"]}),
-        )
-
-    def test_group_encoding(self):
-        # Path components and query arguments should be decoded the same way
-        self.assertEqual(
-            self.fetch_json("/group/%C3%A9?arg=%C3%A9"),
-            {
-                u"path": u"/group/%C3%A9",
-                u"path_args": [u"\u00e9"],
-                u"args": {u"arg": [u"\u00e9"]},
-            },
-        )
-
-    def test_slashes(self):
-        # Slashes may be escaped to appear as a single "directory" in the path,
-        # but they are then unescaped when passed to the get() method.
-        self.assertEqual(
-            self.fetch_json("/slashes/foo/bar"),
-            dict(path="/slashes/foo/bar", path_args=["foo", "bar"], args={}),
-        )
-        self.assertEqual(
-            self.fetch_json("/slashes/a%2Fb/c%2Fd"),
-            dict(path="/slashes/a%2Fb/c%2Fd", path_args=["a/b", "c/d"], args={}),
-        )
-
-    def test_error(self):
-        # Percent signs (encoded as %25) should not mess up printf-style
-        # messages in logs
-        with ExpectLog(gen_log, ".*Invalid unicode"):
-            self.fetch("/group/?arg=%25%e9")
-
-
-class TypeCheckHandler(RequestHandler):
-    def prepare(self):
-        self.errors = {}  # type: typing.Dict[str, str]
-
-        self.check_type("status", self.get_status(), int)
-
-        # get_argument is an exception from the general rule of using
-        # type str for non-body data mainly for historical reasons.
-        self.check_type("argument", self.get_argument("foo"), unicode_type)
-        self.check_type("cookie_key", list(self.cookies.keys())[0], str)
-        self.check_type("cookie_value", list(self.cookies.values())[0].value, str)
-
-        # Secure cookies return bytes because they can contain arbitrary
-        # data, but regular cookies are native strings.
-        if list(self.cookies.keys()) != ["asdf"]:
-            raise Exception(
-                "unexpected values for cookie keys: %r" % self.cookies.keys()
-            )
-        self.check_type("get_secure_cookie", self.get_secure_cookie("asdf"), bytes)
-        self.check_type("get_cookie", self.get_cookie("asdf"), str)
-
-        self.check_type("xsrf_token", self.xsrf_token, bytes)
-        self.check_type("xsrf_form_html", self.xsrf_form_html(), str)
-
-        self.check_type("reverse_url", self.reverse_url("typecheck", "foo"), str)
-
-        self.check_type("request_summary", self._request_summary(), str)
-
-    def get(self, path_component):
-        # path_component uses type unicode instead of str for consistency
-        # with get_argument()
-        self.check_type("path_component", path_component, unicode_type)
-        self.write(self.errors)
-
-    def post(self, path_component):
-        self.check_type("path_component", path_component, unicode_type)
-        self.write(self.errors)
-
-    def check_type(self, name, obj, expected_type):
-        actual_type = type(obj)
-        if expected_type != actual_type:
-            self.errors[name] = "expected %s, got %s" % (expected_type, actual_type)
-
-
-class DecodeArgHandler(RequestHandler):
-    def decode_argument(self, value, name=None):
-        if type(value) != bytes:
-            raise Exception("unexpected type for value: %r" % type(value))
-        # use self.request.arguments directly to avoid recursion
-        if "encoding" in self.request.arguments:
-            return value.decode(to_unicode(self.request.arguments["encoding"][0]))
-        else:
-            return value
-
-    def get(self, arg):
-        def describe(s):
-            if type(s) == bytes:
-                return ["bytes", native_str(binascii.b2a_hex(s))]
-            elif type(s) == unicode_type:
-                return ["unicode", s]
-            raise Exception("unknown type")
-
-        self.write({"path": describe(arg), "query": describe(self.get_argument("foo"))})
-
-
-class LinkifyHandler(RequestHandler):
-    def get(self):
-        self.render("linkify.html", message="http://example.com")
-
-
-class UIModuleResourceHandler(RequestHandler):
-    def get(self):
-        self.render("page.html", entries=[1, 2])
-
-
-class OptionalPathHandler(RequestHandler):
-    def get(self, path):
-        self.write({"path": path})
-
-
-class MultiHeaderHandler(RequestHandler):
-    def get(self):
-        self.set_header("x-overwrite", "1")
-        self.set_header("X-Overwrite", 2)
-        self.add_header("x-multi", 3)
-        self.add_header("X-Multi", "4")
-
-
-class RedirectHandler(RequestHandler):
-    def get(self):
-        if self.get_argument("permanent", None) is not None:
-            self.redirect("/", permanent=int(self.get_argument("permanent")))
-        elif self.get_argument("status", None) is not None:
-            self.redirect("/", status=int(self.get_argument("status")))
-        else:
-            raise Exception("didn't get permanent or status arguments")
-
-
-class EmptyFlushCallbackHandler(RequestHandler):
-    @gen.coroutine
-    def get(self):
-        # Ensure that the flush callback is run whether or not there
-        # was any output.  The gen.Task and direct yield forms are
-        # equivalent.
-        yield self.flush()  # "empty" flush, but writes headers
-        yield self.flush()  # empty flush
-        self.write("o")
-        yield self.flush()  # flushes the "o"
-        yield self.flush()  # empty flush
-        self.finish("k")
-
-
-class HeaderInjectionHandler(RequestHandler):
-    def get(self):
-        try:
-            self.set_header("X-Foo", "foo\r\nX-Bar: baz")
-            raise Exception("Didn't get expected exception")
-        except ValueError as e:
-            if "Unsafe header value" in str(e):
-                self.finish(b"ok")
-            else:
-                raise
-
-
-class GetArgumentHandler(RequestHandler):
-    def prepare(self):
-        if self.get_argument("source", None) == "query":
-            method = self.get_query_argument
-        elif self.get_argument("source", None) == "body":
-            method = self.get_body_argument
-        else:
-            method = self.get_argument
-        self.finish(method("foo", "default"))
-
-
-class GetArgumentsHandler(RequestHandler):
-    def prepare(self):
-        self.finish(
-            dict(
-                default=self.get_arguments("foo"),
-                query=self.get_query_arguments("foo"),
-                body=self.get_body_arguments("foo"),
-            )
-        )
-
-
-# This test was shared with wsgi_test.py; now the name is meaningless.
-class WSGISafeWebTest(WebTestCase):
-    COOKIE_SECRET = "WebTest.COOKIE_SECRET"
-
-    def get_app_kwargs(self):
-        loader = DictLoader(
-            {
-                "linkify.html": "{% module linkify(message) %}",
-                "page.html": """\
-<html><head></head><body>
-{% for e in entries %}
-{% module Template("entry.html", entry=e) %}
-{% end %}
-</body></html>""",
-                "entry.html": """\
-{{ set_resources(embedded_css=".entry { margin-bottom: 1em; }",
-                 embedded_javascript="js_embed()",
-                 css_files=["/base.css", "/foo.css"],
-                 javascript_files="/common.js",
-                 html_head="<meta>",
-                 html_body='<script src="/analytics.js"/>') }}
-<div class="entry">...</div>""",
-            }
-        )
-        return dict(
-            template_loader=loader,
-            autoescape="xhtml_escape",
-            cookie_secret=self.COOKIE_SECRET,
-        )
-
-    def tearDown(self):
-        super(WSGISafeWebTest, self).tearDown()
-        RequestHandler._template_loaders.clear()
-
-    def get_handlers(self):
-        urls = [
-            url("/typecheck/(.*)", TypeCheckHandler, name="typecheck"),
-            url("/decode_arg/(.*)", DecodeArgHandler, name="decode_arg"),
-            url("/decode_arg_kw/(?P<arg>.*)", DecodeArgHandler),
-            url("/linkify", LinkifyHandler),
-            url("/uimodule_resources", UIModuleResourceHandler),
-            url("/optional_path/(.+)?", OptionalPathHandler),
-            url("/multi_header", MultiHeaderHandler),
-            url("/redirect", RedirectHandler),
-            url(
-                "/web_redirect_permanent",
-                WebRedirectHandler,
-                {"url": "/web_redirect_newpath"},
-            ),
-            url(
-                "/web_redirect",
-                WebRedirectHandler,
-                {"url": "/web_redirect_newpath", "permanent": False},
-            ),
-            url(
-                "//web_redirect_double_slash",
-                WebRedirectHandler,
-                {"url": "/web_redirect_newpath"},
-            ),
-            url("/header_injection", HeaderInjectionHandler),
-            url("/get_argument", GetArgumentHandler),
-            url("/get_arguments", GetArgumentsHandler),
-        ]
-        return urls
-
-    def fetch_json(self, *args, **kwargs):
-        response = self.fetch(*args, **kwargs)
-        response.rethrow()
-        return json_decode(response.body)
-
-    def test_types(self):
-        cookie_value = to_unicode(
-            create_signed_value(self.COOKIE_SECRET, "asdf", "qwer")
-        )
-        response = self.fetch(
-            "/typecheck/asdf?foo=bar", headers={"Cookie": "asdf=" + cookie_value}
-        )
-        data = json_decode(response.body)
-        self.assertEqual(data, {})
-
-        response = self.fetch(
-            "/typecheck/asdf?foo=bar",
-            method="POST",
-            headers={"Cookie": "asdf=" + cookie_value},
-            body="foo=bar",
-        )
-
-    def test_decode_argument(self):
-        # These urls all decode to the same thing
-        urls = [
-            "/decode_arg/%C3%A9?foo=%C3%A9&encoding=utf-8",
-            "/decode_arg/%E9?foo=%E9&encoding=latin1",
-            "/decode_arg_kw/%E9?foo=%E9&encoding=latin1",
-        ]
-        for req_url in urls:
-            response = self.fetch(req_url)
-            response.rethrow()
-            data = json_decode(response.body)
-            self.assertEqual(
-                data,
-                {u"path": [u"unicode", u"\u00e9"], u"query": [u"unicode", u"\u00e9"]},
-            )
-
-        response = self.fetch("/decode_arg/%C3%A9?foo=%C3%A9")
-        response.rethrow()
-        data = json_decode(response.body)
-        self.assertEqual(
-            data, {u"path": [u"bytes", u"c3a9"], u"query": [u"bytes", u"c3a9"]}
-        )
-
-    def test_decode_argument_invalid_unicode(self):
-        # test that invalid unicode in URLs causes 400, not 500
-        with ExpectLog(gen_log, ".*Invalid unicode.*"):
-            response = self.fetch("/typecheck/invalid%FF")
-            self.assertEqual(response.code, 400)
-            response = self.fetch("/typecheck/invalid?foo=%FF")
-            self.assertEqual(response.code, 400)
-
-    def test_decode_argument_plus(self):
-        # These urls are all equivalent.
-        urls = [
-            "/decode_arg/1%20%2B%201?foo=1%20%2B%201&encoding=utf-8",
-            "/decode_arg/1%20+%201?foo=1+%2B+1&encoding=utf-8",
-        ]
-        for req_url in urls:
-            response = self.fetch(req_url)
-            response.rethrow()
-            data = json_decode(response.body)
-            self.assertEqual(
-                data,
-                {u"path": [u"unicode", u"1 + 1"], u"query": [u"unicode", u"1 + 1"]},
-            )
-
-    def test_reverse_url(self):
-        self.assertEqual(self.app.reverse_url("decode_arg", "foo"), "/decode_arg/foo")
-        self.assertEqual(self.app.reverse_url("decode_arg", 42), "/decode_arg/42")
-        self.assertEqual(self.app.reverse_url("decode_arg", b"\xe9"), "/decode_arg/%E9")
-        self.assertEqual(
-            self.app.reverse_url("decode_arg", u"\u00e9"), "/decode_arg/%C3%A9"
-        )
-        self.assertEqual(
-            self.app.reverse_url("decode_arg", "1 + 1"), "/decode_arg/1%20%2B%201"
-        )
-
-    def test_uimodule_unescaped(self):
-        response = self.fetch("/linkify")
-        self.assertEqual(
-            response.body, b'<a href="http://example.com">http://example.com</a>'
-        )
-
-    def test_uimodule_resources(self):
-        response = self.fetch("/uimodule_resources")
-        self.assertEqual(
-            response.body,
-            b"""\
-<html><head><link href="/base.css" type="text/css" rel="stylesheet"/><link href="/foo.css" type="text/css" rel="stylesheet"/>
-<style type="text/css">
-.entry { margin-bottom: 1em; }
-</style>
-<meta>
-</head><body>
-
-
-<div class="entry">...</div>
-
-
-<div class="entry">...</div>
-
-<script src="/common.js" type="text/javascript"></script>
-<script type="text/javascript">
-//<![CDATA[
-js_embed()
-//]]>
-</script>
-<script src="/analytics.js"/>
-</body></html>""",  # noqa: E501
-        )
-
-    def test_optional_path(self):
-        self.assertEqual(self.fetch_json("/optional_path/foo"), {u"path": u"foo"})
-        self.assertEqual(self.fetch_json("/optional_path/"), {u"path": None})
-
-    def test_multi_header(self):
-        response = self.fetch("/multi_header")
-        self.assertEqual(response.headers["x-overwrite"], "2")
-        self.assertEqual(response.headers.get_list("x-multi"), ["3", "4"])
-
-    def test_redirect(self):
-        response = self.fetch("/redirect?permanent=1", follow_redirects=False)
-        self.assertEqual(response.code, 301)
-        response = self.fetch("/redirect?permanent=0", follow_redirects=False)
-        self.assertEqual(response.code, 302)
-        response = self.fetch("/redirect?status=307", follow_redirects=False)
-        self.assertEqual(response.code, 307)
-
-    def test_web_redirect(self):
-        response = self.fetch("/web_redirect_permanent", follow_redirects=False)
-        self.assertEqual(response.code, 301)
-        self.assertEqual(response.headers["Location"], "/web_redirect_newpath")
-        response = self.fetch("/web_redirect", follow_redirects=False)
-        self.assertEqual(response.code, 302)
-        self.assertEqual(response.headers["Location"], "/web_redirect_newpath")
-
-    def test_web_redirect_double_slash(self):
-        response = self.fetch("//web_redirect_double_slash", follow_redirects=False)
-        self.assertEqual(response.code, 301)
-        self.assertEqual(response.headers["Location"], "/web_redirect_newpath")
-
-    def test_header_injection(self):
-        response = self.fetch("/header_injection")
-        self.assertEqual(response.body, b"ok")
-
-    def test_get_argument(self):
-        response = self.fetch("/get_argument?foo=bar")
-        self.assertEqual(response.body, b"bar")
-        response = self.fetch("/get_argument?foo=")
-        self.assertEqual(response.body, b"")
-        response = self.fetch("/get_argument")
-        self.assertEqual(response.body, b"default")
-
-        # Test merging of query and body arguments.
-        # In singular form, body arguments take precedence over query arguments.
-        body = urllib.parse.urlencode(dict(foo="hello"))
-        response = self.fetch("/get_argument?foo=bar", method="POST", body=body)
-        self.assertEqual(response.body, b"hello")
-        # In plural methods they are merged.
-        response = self.fetch("/get_arguments?foo=bar", method="POST", body=body)
-        self.assertEqual(
-            json_decode(response.body),
-            dict(default=["bar", "hello"], query=["bar"], body=["hello"]),
-        )
-
-    def test_get_query_arguments(self):
-        # send as a post so we can ensure the separation between query
-        # string and body arguments.
-        body = urllib.parse.urlencode(dict(foo="hello"))
-        response = self.fetch(
-            "/get_argument?source=query&foo=bar", method="POST", body=body
-        )
-        self.assertEqual(response.body, b"bar")
-        response = self.fetch(
-            "/get_argument?source=query&foo=", method="POST", body=body
-        )
-        self.assertEqual(response.body, b"")
-        response = self.fetch("/get_argument?source=query", method="POST", body=body)
-        self.assertEqual(response.body, b"default")
-
-    def test_get_body_arguments(self):
-        body = urllib.parse.urlencode(dict(foo="bar"))
-        response = self.fetch(
-            "/get_argument?source=body&foo=hello", method="POST", body=body
-        )
-        self.assertEqual(response.body, b"bar")
-
-        body = urllib.parse.urlencode(dict(foo=""))
-        response = self.fetch(
-            "/get_argument?source=body&foo=hello", method="POST", body=body
-        )
-        self.assertEqual(response.body, b"")
-
-        body = urllib.parse.urlencode(dict())
-        response = self.fetch(
-            "/get_argument?source=body&foo=hello", method="POST", body=body
-        )
-        self.assertEqual(response.body, b"default")
-
-    def test_no_gzip(self):
-        response = self.fetch("/get_argument")
-        self.assertNotIn("Accept-Encoding", response.headers.get("Vary", ""))
-        self.assertNotIn("gzip", response.headers.get("Content-Encoding", ""))
-
-
-class NonWSGIWebTests(WebTestCase):
-    def get_handlers(self):
-        return [("/empty_flush", EmptyFlushCallbackHandler)]
-
-    def test_empty_flush(self):
-        response = self.fetch("/empty_flush")
-        self.assertEqual(response.body, b"ok")
-
-
-class ErrorResponseTest(WebTestCase):
-    def get_handlers(self):
-        class DefaultHandler(RequestHandler):
-            def get(self):
-                if self.get_argument("status", None):
-                    raise HTTPError(int(self.get_argument("status")))
-                1 / 0
-
-        class WriteErrorHandler(RequestHandler):
-            def get(self):
-                if self.get_argument("status", None):
-                    self.send_error(int(self.get_argument("status")))
-                else:
-                    1 / 0
-
-            def write_error(self, status_code, **kwargs):
-                self.set_header("Content-Type", "text/plain")
-                if "exc_info" in kwargs:
-                    self.write("Exception: %s" % kwargs["exc_info"][0].__name__)
-                else:
-                    self.write("Status: %d" % status_code)
-
-        class FailedWriteErrorHandler(RequestHandler):
-            def get(self):
-                1 / 0
-
-            def write_error(self, status_code, **kwargs):
-                raise Exception("exception in write_error")
-
-        return [
-            url("/default", DefaultHandler),
-            url("/write_error", WriteErrorHandler),
-            url("/failed_write_error", FailedWriteErrorHandler),
-        ]
-
-    def test_default(self):
-        with ExpectLog(app_log, "Uncaught exception"):
-            response = self.fetch("/default")
-            self.assertEqual(response.code, 500)
-            self.assertTrue(b"500: Internal Server Error" in response.body)
-
-            response = self.fetch("/default?status=503")
-            self.assertEqual(response.code, 503)
-            self.assertTrue(b"503: Service Unavailable" in response.body)
-
-            response = self.fetch("/default?status=435")
-            self.assertEqual(response.code, 435)
-            self.assertTrue(b"435: Unknown" in response.body)
-
-    def test_write_error(self):
-        with ExpectLog(app_log, "Uncaught exception"):
-            response = self.fetch("/write_error")
-            self.assertEqual(response.code, 500)
-            self.assertEqual(b"Exception: ZeroDivisionError", response.body)
-
-            response = self.fetch("/write_error?status=503")
-            self.assertEqual(response.code, 503)
-            self.assertEqual(b"Status: 503", response.body)
-
-    def test_failed_write_error(self):
-        with ExpectLog(app_log, "Uncaught exception"):
-            response = self.fetch("/failed_write_error")
-            self.assertEqual(response.code, 500)
-            self.assertEqual(b"", response.body)
-
-
-class StaticFileTest(WebTestCase):
-    # The expected MD5 hash of robots.txt, used in tests that call
-    # StaticFileHandler.get_version
-    robots_txt_hash = b"f71d20196d4caf35b6a670db8c70b03d"
-    static_dir = os.path.join(os.path.dirname(__file__), "static")
-
-    def get_handlers(self):
-        class StaticUrlHandler(RequestHandler):
-            def get(self, path):
-                with_v = int(self.get_argument("include_version", 1))
-                self.write(self.static_url(path, include_version=with_v))
-
-        class AbsoluteStaticUrlHandler(StaticUrlHandler):
-            include_host = True
-
-        class OverrideStaticUrlHandler(RequestHandler):
-            def get(self, path):
-                do_include = bool(self.get_argument("include_host"))
-                self.include_host = not do_include
-
-                regular_url = self.static_url(path)
-                override_url = self.static_url(path, include_host=do_include)
-                if override_url == regular_url:
-                    return self.write(str(False))
-
-                protocol = self.request.protocol + "://"
-                protocol_length = len(protocol)
-                check_regular = regular_url.find(protocol, 0, protocol_length)
-                check_override = override_url.find(protocol, 0, protocol_length)
-
-                if do_include:
-                    result = check_override == 0 and check_regular == -1
-                else:
-                    result = check_override == -1 and check_regular == 0
-                self.write(str(result))
-
-        return [
-            ("/static_url/(.*)", StaticUrlHandler),
-            ("/abs_static_url/(.*)", AbsoluteStaticUrlHandler),
-            ("/override_static_url/(.*)", OverrideStaticUrlHandler),
-            ("/root_static/(.*)", StaticFileHandler, dict(path="/")),
-        ]
-
-    def get_app_kwargs(self):
-        return dict(static_path=relpath("static"))
-
-    def test_static_files(self):
-        response = self.fetch("/robots.txt")
-        self.assertTrue(b"Disallow: /" in response.body)
-
-        response = self.fetch("/static/robots.txt")
-        self.assertTrue(b"Disallow: /" in response.body)
-        self.assertEqual(response.headers.get("Content-Type"), "text/plain")
-
-    def test_static_compressed_files(self):
-        response = self.fetch("/static/sample.xml.gz")
-        self.assertEqual(response.headers.get("Content-Type"), "application/gzip")
-        response = self.fetch("/static/sample.xml.bz2")
-        self.assertEqual(
-            response.headers.get("Content-Type"), "application/octet-stream"
-        )
-        # make sure the uncompressed file still has the correct type
-        response = self.fetch("/static/sample.xml")
-        self.assertTrue(
-            response.headers.get("Content-Type") in set(("text/xml", "application/xml"))
-        )
-
-    def test_static_url(self):
-        response = self.fetch("/static_url/robots.txt")
-        self.assertEqual(response.body, b"/static/robots.txt?v=" + self.robots_txt_hash)
-
-    def test_absolute_static_url(self):
-        response = self.fetch("/abs_static_url/robots.txt")
-        self.assertEqual(
-            response.body,
-            (utf8(self.get_url("/")) + b"static/robots.txt?v=" + self.robots_txt_hash),
-        )
-
-    def test_relative_version_exclusion(self):
-        response = self.fetch("/static_url/robots.txt?include_version=0")
-        self.assertEqual(response.body, b"/static/robots.txt")
-
-    def test_absolute_version_exclusion(self):
-        response = self.fetch("/abs_static_url/robots.txt?include_version=0")
-        self.assertEqual(response.body, utf8(self.get_url("/") + "static/robots.txt"))
-
-    def test_include_host_override(self):
-        self._trigger_include_host_check(False)
-        self._trigger_include_host_check(True)
-
-    def _trigger_include_host_check(self, include_host):
-        path = "/override_static_url/robots.txt?include_host=%s"
-        response = self.fetch(path % int(include_host))
-        self.assertEqual(response.body, utf8(str(True)))
-
-    def get_and_head(self, *args, **kwargs):
-        """Performs a GET and HEAD request and returns the GET response.
-
-        Fails if any ``Content-*`` headers returned by the two requests
-        differ.
-        """
-        head_response = self.fetch(*args, method="HEAD", **kwargs)
-        get_response = self.fetch(*args, method="GET", **kwargs)
-        content_headers = set()
-        for h in itertools.chain(head_response.headers, get_response.headers):
-            if h.startswith("Content-"):
-                content_headers.add(h)
-        for h in content_headers:
-            self.assertEqual(
-                head_response.headers.get(h),
-                get_response.headers.get(h),
-                "%s differs between GET (%s) and HEAD (%s)"
-                % (h, head_response.headers.get(h), get_response.headers.get(h)),
-            )
-        return get_response
-
-    def test_static_304_if_modified_since(self):
-        response1 = self.get_and_head("/static/robots.txt")
-        response2 = self.get_and_head(
-            "/static/robots.txt",
-            headers={"If-Modified-Since": response1.headers["Last-Modified"]},
-        )
-        self.assertEqual(response2.code, 304)
-        self.assertTrue("Content-Length" not in response2.headers)
-        self.assertTrue("Last-Modified" not in response2.headers)
-
-    def test_static_304_if_none_match(self):
-        response1 = self.get_and_head("/static/robots.txt")
-        response2 = self.get_and_head(
-            "/static/robots.txt", headers={"If-None-Match": response1.headers["Etag"]}
-        )
-        self.assertEqual(response2.code, 304)
-
-    def test_static_304_etag_modified_bug(self):
-        response1 = self.get_and_head("/static/robots.txt")
-        response2 = self.get_and_head(
-            "/static/robots.txt",
-            headers={
-                "If-None-Match": '"MISMATCH"',
-                "If-Modified-Since": response1.headers["Last-Modified"],
-            },
-        )
-        self.assertEqual(response2.code, 200)
-
-    def test_static_if_modified_since_pre_epoch(self):
-        # On windows, the functions that work with time_t do not accept
-        # negative values, and at least one client (processing.js) seems
-        # to use if-modified-since 1/1/1960 as a cache-busting technique.
-        response = self.get_and_head(
-            "/static/robots.txt",
-            headers={"If-Modified-Since": "Fri, 01 Jan 1960 00:00:00 GMT"},
-        )
-        self.assertEqual(response.code, 200)
-
-    def test_static_if_modified_since_time_zone(self):
-        # Instead of the value from Last-Modified, make requests with times
-        # chosen just before and after the known modification time
-        # of the file to ensure that the right time zone is being used
-        # when parsing If-Modified-Since.
-        stat = os.stat(relpath("static/robots.txt"))
-
-        response = self.get_and_head(
-            "/static/robots.txt",
-            headers={"If-Modified-Since": format_timestamp(stat.st_mtime - 1)},
-        )
-        self.assertEqual(response.code, 200)
-        response = self.get_and_head(
-            "/static/robots.txt",
-            headers={"If-Modified-Since": format_timestamp(stat.st_mtime + 1)},
-        )
-        self.assertEqual(response.code, 304)
-
-    def test_static_etag(self):
-        response = self.get_and_head("/static/robots.txt")
-        self.assertEqual(
-            utf8(response.headers.get("Etag")), b'"' + self.robots_txt_hash + b'"'
-        )
-
-    def test_static_with_range(self):
-        response = self.get_and_head(
-            "/static/robots.txt", headers={"Range": "bytes=0-9"}
-        )
-        self.assertEqual(response.code, 206)
-        self.assertEqual(response.body, b"User-agent")
-        self.assertEqual(
-            utf8(response.headers.get("Etag")), b'"' + self.robots_txt_hash + b'"'
-        )
-        self.assertEqual(response.headers.get("Content-Length"), "10")
-        self.assertEqual(response.headers.get("Content-Range"), "bytes 0-9/26")
-
-    def test_static_with_range_full_file(self):
-        response = self.get_and_head(
-            "/static/robots.txt", headers={"Range": "bytes=0-"}
-        )
-        # Note: Chrome refuses to play audio if it gets an HTTP 206 in response
-        # to ``Range: bytes=0-`` :(
-        self.assertEqual(response.code, 200)
-        robots_file_path = os.path.join(self.static_dir, "robots.txt")
-        with open(robots_file_path) as f:
-            self.assertEqual(response.body, utf8(f.read()))
-        self.assertEqual(response.headers.get("Content-Length"), "26")
-        self.assertEqual(response.headers.get("Content-Range"), None)
-
-    def test_static_with_range_full_past_end(self):
-        response = self.get_and_head(
-            "/static/robots.txt", headers={"Range": "bytes=0-10000000"}
-        )
-        self.assertEqual(response.code, 200)
-        robots_file_path = os.path.join(self.static_dir, "robots.txt")
-        with open(robots_file_path) as f:
-            self.assertEqual(response.body, utf8(f.read()))
-        self.assertEqual(response.headers.get("Content-Length"), "26")
-        self.assertEqual(response.headers.get("Content-Range"), None)
-
-    def test_static_with_range_partial_past_end(self):
-        response = self.get_and_head(
-            "/static/robots.txt", headers={"Range": "bytes=1-10000000"}
-        )
-        self.assertEqual(response.code, 206)
-        robots_file_path = os.path.join(self.static_dir, "robots.txt")
-        with open(robots_file_path) as f:
-            self.assertEqual(response.body, utf8(f.read()[1:]))
-        self.assertEqual(response.headers.get("Content-Length"), "25")
-        self.assertEqual(response.headers.get("Content-Range"), "bytes 1-25/26")
-
-    def test_static_with_range_end_edge(self):
-        response = self.get_and_head(
-            "/static/robots.txt", headers={"Range": "bytes=22-"}
-        )
-        self.assertEqual(response.body, b": /\n")
-        self.assertEqual(response.headers.get("Content-Length"), "4")
-        self.assertEqual(response.headers.get("Content-Range"), "bytes 22-25/26")
-
-    def test_static_with_range_neg_end(self):
-        response = self.get_and_head(
-            "/static/robots.txt", headers={"Range": "bytes=-4"}
-        )
-        self.assertEqual(response.body, b": /\n")
-        self.assertEqual(response.headers.get("Content-Length"), "4")
-        self.assertEqual(response.headers.get("Content-Range"), "bytes 22-25/26")
-
-    def test_static_with_range_neg_past_start(self):
-        response = self.get_and_head(
-            "/static/robots.txt", headers={"Range": "bytes=-1000000"}
-        )
-        self.assertEqual(response.code, 200)
-        robots_file_path = os.path.join(self.static_dir, "robots.txt")
-        with open(robots_file_path) as f:
-            self.assertEqual(response.body, utf8(f.read()))
-        self.assertEqual(response.headers.get("Content-Length"), "26")
-        self.assertEqual(response.headers.get("Content-Range"), None)
-
-    def test_static_invalid_range(self):
-        response = self.get_and_head("/static/robots.txt", headers={"Range": "asdf"})
-        self.assertEqual(response.code, 200)
-
-    def test_static_unsatisfiable_range_zero_suffix(self):
-        response = self.get_and_head(
-            "/static/robots.txt", headers={"Range": "bytes=-0"}
-        )
-        self.assertEqual(response.headers.get("Content-Range"), "bytes */26")
-        self.assertEqual(response.code, 416)
-
-    def test_static_unsatisfiable_range_invalid_start(self):
-        response = self.get_and_head(
-            "/static/robots.txt", headers={"Range": "bytes=26"}
-        )
-        self.assertEqual(response.code, 416)
-        self.assertEqual(response.headers.get("Content-Range"), "bytes */26")
-
-    def test_static_unsatisfiable_range_end_less_than_start(self):
-        response = self.get_and_head(
-            "/static/robots.txt", headers={"Range": "bytes=10-3"}
-        )
-        self.assertEqual(response.code, 416)
-        self.assertEqual(response.headers.get("Content-Range"), "bytes */26")
-
-    def test_static_head(self):
-        response = self.fetch("/static/robots.txt", method="HEAD")
-        self.assertEqual(response.code, 200)
-        # No body was returned, but we did get the right content length.
-        self.assertEqual(response.body, b"")
-        self.assertEqual(response.headers["Content-Length"], "26")
-        self.assertEqual(
-            utf8(response.headers["Etag"]), b'"' + self.robots_txt_hash + b'"'
-        )
-
-    def test_static_head_range(self):
-        response = self.fetch(
-            "/static/robots.txt", method="HEAD", headers={"Range": "bytes=1-4"}
-        )
-        self.assertEqual(response.code, 206)
-        self.assertEqual(response.body, b"")
-        self.assertEqual(response.headers["Content-Length"], "4")
-        self.assertEqual(
-            utf8(response.headers["Etag"]), b'"' + self.robots_txt_hash + b'"'
-        )
-
-    def test_static_range_if_none_match(self):
-        response = self.get_and_head(
-            "/static/robots.txt",
-            headers={
-                "Range": "bytes=1-4",
-                "If-None-Match": b'"' + self.robots_txt_hash + b'"',
-            },
-        )
-        self.assertEqual(response.code, 304)
-        self.assertEqual(response.body, b"")
-        self.assertTrue("Content-Length" not in response.headers)
-        self.assertEqual(
-            utf8(response.headers["Etag"]), b'"' + self.robots_txt_hash + b'"'
-        )
-
-    def test_static_404(self):
-        response = self.get_and_head("/static/blarg")
-        self.assertEqual(response.code, 404)
-
-    def test_path_traversal_protection(self):
-        # curl_httpclient processes ".." on the client side, so we
-        # must test this with simple_httpclient.
-        self.http_client.close()
-        self.http_client = SimpleAsyncHTTPClient()
-        with ExpectLog(gen_log, ".*not in root static directory"):
-            response = self.get_and_head("/static/../static_foo.txt")
-        # Attempted path traversal should result in 403, not 200
-        # (which means the check failed and the file was served)
-        # or 404 (which means that the file didn't exist and
-        # is probably a packaging error).
-        self.assertEqual(response.code, 403)
-
-    @unittest.skipIf(os.name != "posix", "non-posix OS")
-    def test_root_static_path(self):
-        # Sometimes people set the StaticFileHandler's path to '/'
-        # to disable Tornado's path validation (in conjunction with
-        # their own validation in get_absolute_path). Make sure
-        # that the stricter validation in 4.2.1 doesn't break them.
-        path = os.path.join(
-            os.path.dirname(os.path.abspath(__file__)), "static/robots.txt"
-        )
-        response = self.get_and_head("/root_static" + urllib.parse.quote(path))
-        self.assertEqual(response.code, 200)
-
-
-class StaticDefaultFilenameTest(WebTestCase):
-    def get_app_kwargs(self):
-        return dict(
-            static_path=relpath("static"),
-            static_handler_args=dict(default_filename="index.html"),
-        )
-
-    def get_handlers(self):
-        return []
-
-    def test_static_default_filename(self):
-        response = self.fetch("/static/dir/", follow_redirects=False)
-        self.assertEqual(response.code, 200)
-        self.assertEqual(b"this is the index\n", response.body)
-
-    def test_static_default_redirect(self):
-        response = self.fetch("/static/dir", follow_redirects=False)
-        self.assertEqual(response.code, 301)
-        self.assertTrue(response.headers["Location"].endswith("/static/dir/"))
-
-
-class StaticFileWithPathTest(WebTestCase):
-    def get_app_kwargs(self):
-        return dict(
-            static_path=relpath("static"),
-            static_handler_args=dict(default_filename="index.html"),
-        )
-
-    def get_handlers(self):
-        return [("/foo/(.*)", StaticFileHandler, {"path": relpath("templates/")})]
-
-    def test_serve(self):
-        response = self.fetch("/foo/utf8.html")
-        self.assertEqual(response.body, b"H\xc3\xa9llo\n")
-
-
-class CustomStaticFileTest(WebTestCase):
-    def get_handlers(self):
-        class MyStaticFileHandler(StaticFileHandler):
-            @classmethod
-            def make_static_url(cls, settings, path):
-                version_hash = cls.get_version(settings, path)
-                extension_index = path.rindex(".")
-                before_version = path[:extension_index]
-                after_version = path[(extension_index + 1) :]
-                return "/static/%s.%s.%s" % (
-                    before_version,
-                    version_hash,
-                    after_version,
-                )
-
-            def parse_url_path(self, url_path):
-                extension_index = url_path.rindex(".")
-                version_index = url_path.rindex(".", 0, extension_index)
-                return "%s%s" % (url_path[:version_index], url_path[extension_index:])
-
-            @classmethod
-            def get_absolute_path(cls, settings, path):
-                return "CustomStaticFileTest:" + path
-
-            def validate_absolute_path(self, root, absolute_path):
-                return absolute_path
-
-            @classmethod
-            def get_content(self, path, start=None, end=None):
-                assert start is None and end is None
-                if path == "CustomStaticFileTest:foo.txt":
-                    return b"bar"
-                raise Exception("unexpected path %r" % path)
-
-            def get_content_size(self):
-                if self.absolute_path == "CustomStaticFileTest:foo.txt":
-                    return 3
-                raise Exception("unexpected path %r" % self.absolute_path)
-
-            def get_modified_time(self):
-                return None
-
-            @classmethod
-            def get_version(cls, settings, path):
-                return "42"
-
-        class StaticUrlHandler(RequestHandler):
-            def get(self, path):
-                self.write(self.static_url(path))
-
-        self.static_handler_class = MyStaticFileHandler
-
-        return [("/static_url/(.*)", StaticUrlHandler)]
-
-    def get_app_kwargs(self):
-        return dict(static_path="dummy", static_handler_class=self.static_handler_class)
-
-    def test_serve(self):
-        response = self.fetch("/static/foo.42.txt")
-        self.assertEqual(response.body, b"bar")
-
-    def test_static_url(self):
-        with ExpectLog(gen_log, "Could not open static file", required=False):
-            response = self.fetch("/static_url/foo.txt")
-            self.assertEqual(response.body, b"/static/foo.42.txt")
-
-
-class HostMatchingTest(WebTestCase):
-    class Handler(RequestHandler):
-        def initialize(self, reply):
-            self.reply = reply
-
-        def get(self):
-            self.write(self.reply)
-
-    def get_handlers(self):
-        return [("/foo", HostMatchingTest.Handler, {"reply": "wildcard"})]
-
-    def test_host_matching(self):
-        self.app.add_handlers(
-            "www.example.com", [("/foo", HostMatchingTest.Handler, {"reply": "[0]"})]
-        )
-        self.app.add_handlers(
-            r"www\.example\.com", [("/bar", HostMatchingTest.Handler, {"reply": "[1]"})]
-        )
-        self.app.add_handlers(
-            "www.example.com", [("/baz", HostMatchingTest.Handler, {"reply": "[2]"})]
-        )
-        self.app.add_handlers(
-            "www.e.*e.com", [("/baz", HostMatchingTest.Handler, {"reply": "[3]"})]
-        )
-
-        response = self.fetch("/foo")
-        self.assertEqual(response.body, b"wildcard")
-        response = self.fetch("/bar")
-        self.assertEqual(response.code, 404)
-        response = self.fetch("/baz")
-        self.assertEqual(response.code, 404)
-
-        response = self.fetch("/foo", headers={"Host": "www.example.com"})
-        self.assertEqual(response.body, b"[0]")
-        response = self.fetch("/bar", headers={"Host": "www.example.com"})
-        self.assertEqual(response.body, b"[1]")
-        response = self.fetch("/baz", headers={"Host": "www.example.com"})
-        self.assertEqual(response.body, b"[2]")
-        response = self.fetch("/baz", headers={"Host": "www.exe.com"})
-        self.assertEqual(response.body, b"[3]")
-
-
-class DefaultHostMatchingTest(WebTestCase):
-    def get_handlers(self):
-        return []
-
-    def get_app_kwargs(self):
-        return {"default_host": "www.example.com"}
-
-    def test_default_host_matching(self):
-        self.app.add_handlers(
-            "www.example.com", [("/foo", HostMatchingTest.Handler, {"reply": "[0]"})]
-        )
-        self.app.add_handlers(
-            r"www\.example\.com", [("/bar", HostMatchingTest.Handler, {"reply": "[1]"})]
-        )
-        self.app.add_handlers(
-            "www.test.com", [("/baz", HostMatchingTest.Handler, {"reply": "[2]"})]
-        )
-
-        response = self.fetch("/foo")
-        self.assertEqual(response.body, b"[0]")
-        response = self.fetch("/bar")
-        self.assertEqual(response.body, b"[1]")
-        response = self.fetch("/baz")
-        self.assertEqual(response.code, 404)
-
-        response = self.fetch("/foo", headers={"X-Real-Ip": "127.0.0.1"})
-        self.assertEqual(response.code, 404)
-
-        self.app.default_host = "www.test.com"
-
-        response = self.fetch("/baz")
-        self.assertEqual(response.body, b"[2]")
-
-
-class NamedURLSpecGroupsTest(WebTestCase):
-    def get_handlers(self):
-        class EchoHandler(RequestHandler):
-            def get(self, path):
-                self.write(path)
-
-        return [
-            ("/str/(?P<path>.*)", EchoHandler),
-            (u"/unicode/(?P<path>.*)", EchoHandler),
-        ]
-
-    def test_named_urlspec_groups(self):
-        response = self.fetch("/str/foo")
-        self.assertEqual(response.body, b"foo")
-
-        response = self.fetch("/unicode/bar")
-        self.assertEqual(response.body, b"bar")
-
-
-class ClearHeaderTest(SimpleHandlerTestCase):
-    class Handler(RequestHandler):
-        def get(self):
-            self.set_header("h1", "foo")
-            self.set_header("h2", "bar")
-            self.clear_header("h1")
-            self.clear_header("nonexistent")
-
-    def test_clear_header(self):
-        response = self.fetch("/")
-        self.assertTrue("h1" not in response.headers)
-        self.assertEqual(response.headers["h2"], "bar")
-
-
-class Header204Test(SimpleHandlerTestCase):
-    class Handler(RequestHandler):
-        def get(self):
-            self.set_status(204)
-            self.finish()
-
-    def test_204_headers(self):
-        response = self.fetch("/")
-        self.assertEqual(response.code, 204)
-        self.assertNotIn("Content-Length", response.headers)
-        self.assertNotIn("Transfer-Encoding", response.headers)
-
-
-class Header304Test(SimpleHandlerTestCase):
-    class Handler(RequestHandler):
-        def get(self):
-            self.set_header("Content-Language", "en_US")
-            self.write("hello")
-
-    def test_304_headers(self):
-        response1 = self.fetch("/")
-        self.assertEqual(response1.headers["Content-Length"], "5")
-        self.assertEqual(response1.headers["Content-Language"], "en_US")
-
-        response2 = self.fetch(
-            "/", headers={"If-None-Match": response1.headers["Etag"]}
-        )
-        self.assertEqual(response2.code, 304)
-        self.assertTrue("Content-Length" not in response2.headers)
-        self.assertTrue("Content-Language" not in response2.headers)
-        # Not an entity header, but should not be added to 304s by chunking
-        self.assertTrue("Transfer-Encoding" not in response2.headers)
-
-
-class StatusReasonTest(SimpleHandlerTestCase):
-    class Handler(RequestHandler):
-        def get(self):
-            reason = self.request.arguments.get("reason", [])
-            self.set_status(
-                int(self.get_argument("code")), reason=reason[0] if reason else None
-            )
-
-    def get_http_client(self):
-        # simple_httpclient only: curl doesn't expose the reason string
-        return SimpleAsyncHTTPClient()
-
-    def test_status(self):
-        response = self.fetch("/?code=304")
-        self.assertEqual(response.code, 304)
-        self.assertEqual(response.reason, "Not Modified")
-        response = self.fetch("/?code=304&reason=Foo")
-        self.assertEqual(response.code, 304)
-        self.assertEqual(response.reason, "Foo")
-        response = self.fetch("/?code=682&reason=Bar")
-        self.assertEqual(response.code, 682)
-        self.assertEqual(response.reason, "Bar")
-        response = self.fetch("/?code=682")
-        self.assertEqual(response.code, 682)
-        self.assertEqual(response.reason, "Unknown")
-
-
-class DateHeaderTest(SimpleHandlerTestCase):
-    class Handler(RequestHandler):
-        def get(self):
-            self.write("hello")
-
-    def test_date_header(self):
-        response = self.fetch("/")
-        parsed = email.utils.parsedate(response.headers["Date"])
-        assert parsed is not None
-        header_date = datetime.datetime(*parsed[:6])
-        self.assertTrue(
-            header_date - datetime.datetime.utcnow() < datetime.timedelta(seconds=2)
-        )
-
-
-class RaiseWithReasonTest(SimpleHandlerTestCase):
-    class Handler(RequestHandler):
-        def get(self):
-            raise HTTPError(682, reason="Foo")
-
-    def get_http_client(self):
-        # simple_httpclient only: curl doesn't expose the reason string
-        return SimpleAsyncHTTPClient()
-
-    def test_raise_with_reason(self):
-        response = self.fetch("/")
-        self.assertEqual(response.code, 682)
-        self.assertEqual(response.reason, "Foo")
-        self.assertIn(b"682: Foo", response.body)
-
-    def test_httperror_str(self):
-        self.assertEqual(str(HTTPError(682, reason="Foo")), "HTTP 682: Foo")
-
-    def test_httperror_str_from_httputil(self):
-        self.assertEqual(str(HTTPError(682)), "HTTP 682: Unknown")
-
-
-class ErrorHandlerXSRFTest(WebTestCase):
-    def get_handlers(self):
-        # note that if the handlers list is empty we get the default_host
-        # redirect fallback instead of a 404, so test with both an
-        # explicitly defined error handler and an implicit 404.
-        return [("/error", ErrorHandler, dict(status_code=417))]
-
-    def get_app_kwargs(self):
-        return dict(xsrf_cookies=True)
-
-    def test_error_xsrf(self):
-        response = self.fetch("/error", method="POST", body="")
-        self.assertEqual(response.code, 417)
-
-    def test_404_xsrf(self):
-        response = self.fetch("/404", method="POST", body="")
-        self.assertEqual(response.code, 404)
-
-
-class GzipTestCase(SimpleHandlerTestCase):
-    class Handler(RequestHandler):
-        def get(self):
-            for v in self.get_arguments("vary"):
-                self.add_header("Vary", v)
-            # Must write at least MIN_LENGTH bytes to activate compression.
-            self.write("hello world" + ("!" * GZipContentEncoding.MIN_LENGTH))
-
-    def get_app_kwargs(self):
-        return dict(
-            gzip=True, static_path=os.path.join(os.path.dirname(__file__), "static")
-        )
-
-    def assert_compressed(self, response):
-        # simple_httpclient renames the content-encoding header;
-        # curl_httpclient doesn't.
-        self.assertEqual(
-            response.headers.get(
-                "Content-Encoding", response.headers.get("X-Consumed-Content-Encoding")
-            ),
-            "gzip",
-        )
-
-    def test_gzip(self):
-        response = self.fetch("/")
-        self.assert_compressed(response)
-        self.assertEqual(response.headers["Vary"], "Accept-Encoding")
-
-    def test_gzip_static(self):
-        # The streaming responses in StaticFileHandler have subtle
-        # interactions with the gzip output so test this case separately.
-        response = self.fetch("/robots.txt")
-        self.assert_compressed(response)
-        self.assertEqual(response.headers["Vary"], "Accept-Encoding")
-
-    def test_gzip_not_requested(self):
-        response = self.fetch("/", use_gzip=False)
-        self.assertNotIn("Content-Encoding", response.headers)
-        self.assertEqual(response.headers["Vary"], "Accept-Encoding")
-
-    def test_vary_already_present(self):
-        response = self.fetch("/?vary=Accept-Language")
-        self.assert_compressed(response)
-        self.assertEqual(
-            [s.strip() for s in response.headers["Vary"].split(",")],
-            ["Accept-Language", "Accept-Encoding"],
-        )
-
-    def test_vary_already_present_multiple(self):
-        # Regression test for https://github.com/tornadoweb/tornado/issues/1670
-        response = self.fetch("/?vary=Accept-Language&vary=Cookie")
-        self.assert_compressed(response)
-        self.assertEqual(
-            [s.strip() for s in response.headers["Vary"].split(",")],
-            ["Accept-Language", "Cookie", "Accept-Encoding"],
-        )
-
-
-class PathArgsInPrepareTest(WebTestCase):
-    class Handler(RequestHandler):
-        def prepare(self):
-            self.write(dict(args=self.path_args, kwargs=self.path_kwargs))
-
-        def get(self, path):
-            assert path == "foo"
-            self.finish()
-
-    def get_handlers(self):
-        return [("/pos/(.*)", self.Handler), ("/kw/(?P<path>.*)", self.Handler)]
-
-    def test_pos(self):
-        response = self.fetch("/pos/foo")
-        response.rethrow()
-        data = json_decode(response.body)
-        self.assertEqual(data, {"args": ["foo"], "kwargs": {}})
-
-    def test_kw(self):
-        response = self.fetch("/kw/foo")
-        response.rethrow()
-        data = json_decode(response.body)
-        self.assertEqual(data, {"args": [], "kwargs": {"path": "foo"}})
-
-
-class ClearAllCookiesTest(SimpleHandlerTestCase):
-    class Handler(RequestHandler):
-        def get(self):
-            self.clear_all_cookies()
-            self.write("ok")
-
-    def test_clear_all_cookies(self):
-        response = self.fetch("/", headers={"Cookie": "foo=bar; baz=xyzzy"})
-        set_cookies = sorted(response.headers.get_list("Set-Cookie"))
-        # Python 3.5 sends 'baz="";'; older versions use 'baz=;'
-        self.assertTrue(
-            set_cookies[0].startswith("baz=;") or set_cookies[0].startswith('baz="";')
-        )
-        self.assertTrue(
-            set_cookies[1].startswith("foo=;") or set_cookies[1].startswith('foo="";')
-        )
-
-
-class PermissionError(Exception):
-    pass
-
-
-class ExceptionHandlerTest(SimpleHandlerTestCase):
-    class Handler(RequestHandler):
-        def get(self):
-            exc = self.get_argument("exc")
-            if exc == "http":
-                raise HTTPError(410, "no longer here")
-            elif exc == "zero":
-                1 / 0
-            elif exc == "permission":
-                raise PermissionError("not allowed")
-
-        def write_error(self, status_code, **kwargs):
-            if "exc_info" in kwargs:
-                typ, value, tb = kwargs["exc_info"]
-                if isinstance(value, PermissionError):
-                    self.set_status(403)
-                    self.write("PermissionError")
-                    return
-            RequestHandler.write_error(self, status_code, **kwargs)
-
-        def log_exception(self, typ, value, tb):
-            if isinstance(value, PermissionError):
-                app_log.warning("custom logging for PermissionError: %s", value.args[0])
-            else:
-                RequestHandler.log_exception(self, typ, value, tb)
-
-    def test_http_error(self):
-        # HTTPErrors are logged as warnings with no stack trace.
-        # TODO: extend ExpectLog to test this more precisely
-        with ExpectLog(gen_log, ".*no longer here"):
-            response = self.fetch("/?exc=http")
-            self.assertEqual(response.code, 410)
-
-    def test_unknown_error(self):
-        # Unknown errors are logged as errors with a stack trace.
-        with ExpectLog(app_log, "Uncaught exception"):
-            response = self.fetch("/?exc=zero")
-            self.assertEqual(response.code, 500)
-
-    def test_known_error(self):
-        # log_exception can override logging behavior, and write_error
-        # can override the response.
-        with ExpectLog(app_log, "custom logging for PermissionError: not allowed"):
-            response = self.fetch("/?exc=permission")
-            self.assertEqual(response.code, 403)
-
-
-class BuggyLoggingTest(SimpleHandlerTestCase):
-    class Handler(RequestHandler):
-        def get(self):
-            1 / 0
-
-        def log_exception(self, typ, value, tb):
-            1 / 0
-
-    def test_buggy_log_exception(self):
-        # Something gets logged even though the application's
-        # logger is broken.
-        with ExpectLog(app_log, ".*"):
-            self.fetch("/")
-
-
-class UIMethodUIModuleTest(SimpleHandlerTestCase):
-    """Test that UI methods and modules are created correctly and
-    associated with the handler.
-    """
-
-    class Handler(RequestHandler):
-        def get(self):
-            self.render("foo.html")
-
-        def value(self):
-            return self.get_argument("value")
-
-    def get_app_kwargs(self):
-        def my_ui_method(handler, x):
-            return "In my_ui_method(%s) with handler value %s." % (x, handler.value())
-
-        class MyModule(UIModule):
-            def render(self, x):
-                return "In MyModule(%s) with handler value %s." % (
-                    x,
-                    self.handler.value(),
-                )
-
-        loader = DictLoader(
-            {"foo.html": "{{ my_ui_method(42) }} {% module MyModule(123) %}"}
-        )
-        return dict(
-            template_loader=loader,
-            ui_methods={"my_ui_method": my_ui_method},
-            ui_modules={"MyModule": MyModule},
-        )
-
-    def tearDown(self):
-        super(UIMethodUIModuleTest, self).tearDown()
-        # TODO: fix template loader caching so this isn't necessary.
-        RequestHandler._template_loaders.clear()
-
-    def test_ui_method(self):
-        response = self.fetch("/?value=asdf")
-        self.assertEqual(
-            response.body,
-            b"In my_ui_method(42) with handler value asdf. "
-            b"In MyModule(123) with handler value asdf.",
-        )
-
-
-class GetArgumentErrorTest(SimpleHandlerTestCase):
-    class Handler(RequestHandler):
-        def get(self):
-            try:
-                self.get_argument("foo")
-                self.write({})
-            except MissingArgumentError as e:
-                self.write({"arg_name": e.arg_name, "log_message": e.log_message})
-
-    def test_catch_error(self):
-        response = self.fetch("/")
-        self.assertEqual(
-            json_decode(response.body),
-            {"arg_name": "foo", "log_message": "Missing argument foo"},
-        )
-
-
-class SetLazyPropertiesTest(SimpleHandlerTestCase):
-    class Handler(RequestHandler):
-        def prepare(self):
-            self.current_user = "Ben"
-            self.locale = locale.get("en_US")
-
-        def get_user_locale(self):
-            raise NotImplementedError()
-
-        def get_current_user(self):
-            raise NotImplementedError()
-
-        def get(self):
-            self.write("Hello %s (%s)" % (self.current_user, self.locale.code))
-
-    def test_set_properties(self):
-        # Ensure that current_user can be assigned to normally for apps
-        # that want to forgo the lazy get_current_user property
-        response = self.fetch("/")
-        self.assertEqual(response.body, b"Hello Ben (en_US)")
-
-
-class GetCurrentUserTest(WebTestCase):
-    def get_app_kwargs(self):
-        class WithoutUserModule(UIModule):
-            def render(self):
-                return ""
-
-        class WithUserModule(UIModule):
-            def render(self):
-                return str(self.current_user)
-
-        loader = DictLoader(
-            {
-                "without_user.html": "",
-                "with_user.html": "{{ current_user }}",
-                "without_user_module.html": "{% module WithoutUserModule() %}",
-                "with_user_module.html": "{% module WithUserModule() %}",
-            }
-        )
-        return dict(
-            template_loader=loader,
-            ui_modules={
-                "WithUserModule": WithUserModule,
-                "WithoutUserModule": WithoutUserModule,
-            },
-        )
-
-    def tearDown(self):
-        super(GetCurrentUserTest, self).tearDown()
-        RequestHandler._template_loaders.clear()
-
-    def get_handlers(self):
-        class CurrentUserHandler(RequestHandler):
-            def prepare(self):
-                self.has_loaded_current_user = False
-
-            def get_current_user(self):
-                self.has_loaded_current_user = True
-                return ""
-
-        class WithoutUserHandler(CurrentUserHandler):
-            def get(self):
-                self.render_string("without_user.html")
-                self.finish(str(self.has_loaded_current_user))
-
-        class WithUserHandler(CurrentUserHandler):
-            def get(self):
-                self.render_string("with_user.html")
-                self.finish(str(self.has_loaded_current_user))
-
-        class CurrentUserModuleHandler(CurrentUserHandler):
-            def get_template_namespace(self):
-                # If RequestHandler.get_template_namespace is called, then
-                # get_current_user is evaluated. Until #820 is fixed, this
-                # is a small hack to circumvent the issue.
-                return self.ui
-
-        class WithoutUserModuleHandler(CurrentUserModuleHandler):
-            def get(self):
-                self.render_string("without_user_module.html")
-                self.finish(str(self.has_loaded_current_user))
-
-        class WithUserModuleHandler(CurrentUserModuleHandler):
-            def get(self):
-                self.render_string("with_user_module.html")
-                self.finish(str(self.has_loaded_current_user))
-
-        return [
-            ("/without_user", WithoutUserHandler),
-            ("/with_user", WithUserHandler),
-            ("/without_user_module", WithoutUserModuleHandler),
-            ("/with_user_module", WithUserModuleHandler),
-        ]
-
-    @unittest.skip("needs fix")
-    def test_get_current_user_is_lazy(self):
-        # TODO: Make this test pass. See #820.
-        response = self.fetch("/without_user")
-        self.assertEqual(response.body, b"False")
-
-    def test_get_current_user_works(self):
-        response = self.fetch("/with_user")
-        self.assertEqual(response.body, b"True")
-
-    def test_get_current_user_from_ui_module_is_lazy(self):
-        response = self.fetch("/without_user_module")
-        self.assertEqual(response.body, b"False")
-
-    def test_get_current_user_from_ui_module_works(self):
-        response = self.fetch("/with_user_module")
-        self.assertEqual(response.body, b"True")
-
-
-class UnimplementedHTTPMethodsTest(SimpleHandlerTestCase):
-    class Handler(RequestHandler):
-        pass
-
-    def test_unimplemented_standard_methods(self):
-        for method in ["HEAD", "GET", "DELETE", "OPTIONS"]:
-            response = self.fetch("/", method=method)
-            self.assertEqual(response.code, 405)
-        for method in ["POST", "PUT"]:
-            response = self.fetch("/", method=method, body=b"")
-            self.assertEqual(response.code, 405)
-
-
-class UnimplementedNonStandardMethodsTest(SimpleHandlerTestCase):
-    class Handler(RequestHandler):
-        def other(self):
-            # Even though this method exists, it won't get called automatically
-            # because it is not in SUPPORTED_METHODS.
-            self.write("other")
-
-    def test_unimplemented_patch(self):
-        # PATCH is recently standardized; Tornado supports it by default
-        # but wsgiref.validate doesn't like it.
-        response = self.fetch("/", method="PATCH", body=b"")
-        self.assertEqual(response.code, 405)
-
-    def test_unimplemented_other(self):
-        response = self.fetch("/", method="OTHER", allow_nonstandard_methods=True)
-        self.assertEqual(response.code, 405)
-
-
-class AllHTTPMethodsTest(SimpleHandlerTestCase):
-    class Handler(RequestHandler):
-        def method(self):
-            self.write(self.request.method)
-
-        get = delete = options = post = put = method  # type: ignore
-
-    def test_standard_methods(self):
-        response = self.fetch("/", method="HEAD")
-        self.assertEqual(response.body, b"")
-        for method in ["GET", "DELETE", "OPTIONS"]:
-            response = self.fetch("/", method=method)
-            self.assertEqual(response.body, utf8(method))
-        for method in ["POST", "PUT"]:
-            response = self.fetch("/", method=method, body=b"")
-            self.assertEqual(response.body, utf8(method))
-
-
-class PatchMethodTest(SimpleHandlerTestCase):
-    class Handler(RequestHandler):
-        SUPPORTED_METHODS = RequestHandler.SUPPORTED_METHODS + (  # type: ignore
-            "OTHER",
-        )
-
-        def patch(self):
-            self.write("patch")
-
-        def other(self):
-            self.write("other")
-
-    def test_patch(self):
-        response = self.fetch("/", method="PATCH", body=b"")
-        self.assertEqual(response.body, b"patch")
-
-    def test_other(self):
-        response = self.fetch("/", method="OTHER", allow_nonstandard_methods=True)
-        self.assertEqual(response.body, b"other")
-
-
-class FinishInPrepareTest(SimpleHandlerTestCase):
-    class Handler(RequestHandler):
-        def prepare(self):
-            self.finish("done")
-
-        def get(self):
-            # It's difficult to assert for certain that a method did not
-            # or will not be called in an asynchronous context, but this
-            # will be logged noisily if it is reached.
-            raise Exception("should not reach this method")
-
-    def test_finish_in_prepare(self):
-        response = self.fetch("/")
-        self.assertEqual(response.body, b"done")
-
-
-class Default404Test(WebTestCase):
-    def get_handlers(self):
-        # If there are no handlers at all a default redirect handler gets added.
-        return [("/foo", RequestHandler)]
-
-    def test_404(self):
-        response = self.fetch("/")
-        self.assertEqual(response.code, 404)
-        self.assertEqual(
-            response.body,
-            b"<html><title>404: Not Found</title>"
-            b"<body>404: Not Found</body></html>",
-        )
-
-
-class Custom404Test(WebTestCase):
-    def get_handlers(self):
-        return [("/foo", RequestHandler)]
-
-    def get_app_kwargs(self):
-        class Custom404Handler(RequestHandler):
-            def get(self):
-                self.set_status(404)
-                self.write("custom 404 response")
-
-        return dict(default_handler_class=Custom404Handler)
-
-    def test_404(self):
-        response = self.fetch("/")
-        self.assertEqual(response.code, 404)
-        self.assertEqual(response.body, b"custom 404 response")
-
-
-class DefaultHandlerArgumentsTest(WebTestCase):
-    def get_handlers(self):
-        return [("/foo", RequestHandler)]
-
-    def get_app_kwargs(self):
-        return dict(
-            default_handler_class=ErrorHandler,
-            default_handler_args=dict(status_code=403),
-        )
-
-    def test_403(self):
-        response = self.fetch("/")
-        self.assertEqual(response.code, 403)
-
-
-class HandlerByNameTest(WebTestCase):
-    def get_handlers(self):
-        # All three are equivalent.
-        return [
-            ("/hello1", HelloHandler),
-            ("/hello2", "tornado.test.web_test.HelloHandler"),
-            url("/hello3", "tornado.test.web_test.HelloHandler"),
-        ]
-
-    def test_handler_by_name(self):
-        resp = self.fetch("/hello1")
-        self.assertEqual(resp.body, b"hello")
-        resp = self.fetch("/hello2")
-        self.assertEqual(resp.body, b"hello")
-        resp = self.fetch("/hello3")
-        self.assertEqual(resp.body, b"hello")
-
-
-class StreamingRequestBodyTest(WebTestCase):
-    def get_handlers(self):
-        @stream_request_body
-        class StreamingBodyHandler(RequestHandler):
-            def initialize(self, test):
-                self.test = test
-
-            def prepare(self):
-                self.test.prepared.set_result(None)
-
-            def data_received(self, data):
-                self.test.data.set_result(data)
-
-            def get(self):
-                self.test.finished.set_result(None)
-                self.write({})
-
-        @stream_request_body
-        class EarlyReturnHandler(RequestHandler):
-            def prepare(self):
-                # If we finish the response in prepare, it won't continue to
-                # the (non-existent) data_received.
-                raise HTTPError(401)
-
-        @stream_request_body
-        class CloseDetectionHandler(RequestHandler):
-            def initialize(self, test):
-                self.test = test
-
-            def on_connection_close(self):
-                super(CloseDetectionHandler, self).on_connection_close()
-                self.test.close_future.set_result(None)
-
-        return [
-            ("/stream_body", StreamingBodyHandler, dict(test=self)),
-            ("/early_return", EarlyReturnHandler),
-            ("/close_detection", CloseDetectionHandler, dict(test=self)),
-        ]
-
-    def connect(self, url, connection_close):
-        # Use a raw connection so we can control the sending of data.
-        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0)
-        s.connect(("127.0.0.1", self.get_http_port()))
-        stream = IOStream(s)
-        stream.write(b"GET " + url + b" HTTP/1.1\r\n")
-        if connection_close:
-            stream.write(b"Connection: close\r\n")
-        stream.write(b"Transfer-Encoding: chunked\r\n\r\n")
-        return stream
-
-    @gen_test
-    def test_streaming_body(self):
-        self.prepared = Future()  # type: Future[None]
-        self.data = Future()  # type: Future[bytes]
-        self.finished = Future()  # type: Future[None]
-
-        stream = self.connect(b"/stream_body", connection_close=True)
-        yield self.prepared
-        stream.write(b"4\r\nasdf\r\n")
-        # Ensure the first chunk is received before we send the second.
-        data = yield self.data
-        self.assertEqual(data, b"asdf")
-        self.data = Future()
-        stream.write(b"4\r\nqwer\r\n")
-        data = yield self.data
-        self.assertEquals(data, b"qwer")
-        stream.write(b"0\r\n\r\n")
-        yield self.finished
-        data = yield stream.read_until_close()
-        # This would ideally use an HTTP1Connection to read the response.
-        self.assertTrue(data.endswith(b"{}"))
-        stream.close()
-
-    @gen_test
-    def test_early_return(self):
-        stream = self.connect(b"/early_return", connection_close=False)
-        data = yield stream.read_until_close()
-        self.assertTrue(data.startswith(b"HTTP/1.1 401"))
-
-    @gen_test
-    def test_early_return_with_data(self):
-        stream = self.connect(b"/early_return", connection_close=False)
-        stream.write(b"4\r\nasdf\r\n")
-        data = yield stream.read_until_close()
-        self.assertTrue(data.startswith(b"HTTP/1.1 401"))
-
-    @gen_test
-    def test_close_during_upload(self):
-        self.close_future = Future()  # type: Future[None]
-        stream = self.connect(b"/close_detection", connection_close=False)
-        stream.close()
-        yield self.close_future
-
-
-# Each method in this handler returns a yieldable object and yields to the
-# IOLoop so the future is not immediately ready.  Ensure that the
-# yieldables are respected and no method is called before the previous
-# one has completed.
-@stream_request_body
-class BaseFlowControlHandler(RequestHandler):
-    def initialize(self, test):
-        self.test = test
-        self.method = None
-        self.methods = []  # type: typing.List[str]
-
-    @contextlib.contextmanager
-    def in_method(self, method):
-        if self.method is not None:
-            self.test.fail("entered method %s while in %s" % (method, self.method))
-        self.method = method
-        self.methods.append(method)
-        try:
-            yield
-        finally:
-            self.method = None
-
-    @gen.coroutine
-    def prepare(self):
-        # Note that asynchronous prepare() does not block data_received,
-        # so we don't use in_method here.
-        self.methods.append("prepare")
-        yield gen.moment
-
-    @gen.coroutine
-    def post(self):
-        with self.in_method("post"):
-            yield gen.moment
-        self.write(dict(methods=self.methods))
-
-
-class BaseStreamingRequestFlowControlTest(object):
-    def get_httpserver_options(self):
-        # Use a small chunk size so flow control is relevant even though
-        # all the data arrives at once.
-        return dict(chunk_size=10, decompress_request=True)
-
-    def get_http_client(self):
-        # simple_httpclient only: curl doesn't support body_producer.
-        return SimpleAsyncHTTPClient()
-
-    # Test all the slightly different code paths for fixed, chunked, etc bodies.
-    def test_flow_control_fixed_body(self):
-        response = self.fetch("/", body="abcdefghijklmnopqrstuvwxyz", method="POST")
-        response.rethrow()
-        self.assertEqual(
-            json_decode(response.body),
-            dict(
-                methods=[
-                    "prepare",
-                    "data_received",
-                    "data_received",
-                    "data_received",
-                    "post",
-                ]
-            ),
-        )
-
-    def test_flow_control_chunked_body(self):
-        chunks = [b"abcd", b"efgh", b"ijkl"]
-
-        @gen.coroutine
-        def body_producer(write):
-            for i in chunks:
-                yield write(i)
-
-        response = self.fetch("/", body_producer=body_producer, method="POST")
-        response.rethrow()
-        self.assertEqual(
-            json_decode(response.body),
-            dict(
-                methods=[
-                    "prepare",
-                    "data_received",
-                    "data_received",
-                    "data_received",
-                    "post",
-                ]
-            ),
-        )
-
-    def test_flow_control_compressed_body(self):
-        bytesio = BytesIO()
-        gzip_file = gzip.GzipFile(mode="w", fileobj=bytesio)
-        gzip_file.write(b"abcdefghijklmnopqrstuvwxyz")
-        gzip_file.close()
-        compressed_body = bytesio.getvalue()
-        response = self.fetch(
-            "/",
-            body=compressed_body,
-            method="POST",
-            headers={"Content-Encoding": "gzip"},
-        )
-        response.rethrow()
-        self.assertEqual(
-            json_decode(response.body),
-            dict(
-                methods=[
-                    "prepare",
-                    "data_received",
-                    "data_received",
-                    "data_received",
-                    "post",
-                ]
-            ),
-        )
-
-
-class DecoratedStreamingRequestFlowControlTest(
-    BaseStreamingRequestFlowControlTest, WebTestCase
-):
-    def get_handlers(self):
-        class DecoratedFlowControlHandler(BaseFlowControlHandler):
-            @gen.coroutine
-            def data_received(self, data):
-                with self.in_method("data_received"):
-                    yield gen.moment
-
-        return [("/", DecoratedFlowControlHandler, dict(test=self))]
-
-
-class NativeStreamingRequestFlowControlTest(
-    BaseStreamingRequestFlowControlTest, WebTestCase
-):
-    def get_handlers(self):
-        class NativeFlowControlHandler(BaseFlowControlHandler):
-            async def data_received(self, data):
-                with self.in_method("data_received"):
-                    import asyncio
-
-                    await asyncio.sleep(0)
-
-        return [("/", NativeFlowControlHandler, dict(test=self))]
-
-
-class IncorrectContentLengthTest(SimpleHandlerTestCase):
-    def get_handlers(self):
-        test = self
-        self.server_error = None
-
-        # Manually set a content-length that doesn't match the actual content.
-        class TooHigh(RequestHandler):
-            def get(self):
-                self.set_header("Content-Length", "42")
-                try:
-                    self.finish("ok")
-                except Exception as e:
-                    test.server_error = e
-                    raise
-
-        class TooLow(RequestHandler):
-            def get(self):
-                self.set_header("Content-Length", "2")
-                try:
-                    self.finish("hello")
-                except Exception as e:
-                    test.server_error = e
-                    raise
-
-        return [("/high", TooHigh), ("/low", TooLow)]
-
-    def test_content_length_too_high(self):
-        # When the content-length is too high, the connection is simply
-        # closed without completing the response.  An error is logged on
-        # the server.
-        with ExpectLog(app_log, "(Uncaught exception|Exception in callback)"):
-            with ExpectLog(
-                gen_log,
-                "(Cannot send error response after headers written"
-                "|Failed to flush partial response)",
-            ):
-                with self.assertRaises(HTTPClientError):
-                    self.fetch("/high", raise_error=True)
-        self.assertEqual(
-            str(self.server_error), "Tried to write 40 bytes less than Content-Length"
-        )
-
-    def test_content_length_too_low(self):
-        # When the content-length is too low, the connection is closed
-        # without writing the last chunk, so the client never sees the request
-        # complete (which would be a framing error).
-        with ExpectLog(app_log, "(Uncaught exception|Exception in callback)"):
-            with ExpectLog(
-                gen_log,
-                "(Cannot send error response after headers written"
-                "|Failed to flush partial response)",
-            ):
-                with self.assertRaises(HTTPClientError):
-                    self.fetch("/low", raise_error=True)
-        self.assertEqual(
-            str(self.server_error), "Tried to write more data than Content-Length"
-        )
-
-
-class ClientCloseTest(SimpleHandlerTestCase):
-    class Handler(RequestHandler):
-        def get(self):
-            if self.request.version.startswith("HTTP/1"):
-                # Simulate a connection closed by the client during
-                # request processing.  The client will see an error, but the
-                # server should respond gracefully (without logging errors
-                # because we were unable to write out as many bytes as
-                # Content-Length said we would)
-                self.request.connection.stream.close()
-                self.write("hello")
-            else:
-                # TODO: add a HTTP2-compatible version of this test.
-                self.write("requires HTTP/1.x")
-
-    def test_client_close(self):
-        with self.assertRaises((HTTPClientError, unittest.SkipTest)):
-            response = self.fetch("/", raise_error=True)
-            if response.body == b"requires HTTP/1.x":
-                self.skipTest("requires HTTP/1.x")
-            self.assertEqual(response.code, 599)
-
-
-class SignedValueTest(unittest.TestCase):
-    SECRET = "It's a secret to everybody"
-    SECRET_DICT = {0: "asdfbasdf", 1: "12312312", 2: "2342342"}
-
-    def past(self):
-        return self.present() - 86400 * 32
-
-    def present(self):
-        return 1300000000
-
-    def test_known_values(self):
-        signed_v1 = create_signed_value(
-            SignedValueTest.SECRET, "key", "value", version=1, clock=self.present
-        )
-        self.assertEqual(
-            signed_v1, b"dmFsdWU=|1300000000|31c934969f53e48164c50768b40cbd7e2daaaa4f"
-        )
-
-        signed_v2 = create_signed_value(
-            SignedValueTest.SECRET, "key", "value", version=2, clock=self.present
-        )
-        self.assertEqual(
-            signed_v2,
-            b"2|1:0|10:1300000000|3:key|8:dmFsdWU=|"
-            b"3d4e60b996ff9c5d5788e333a0cba6f238a22c6c0f94788870e1a9ecd482e152",
-        )
-
-        signed_default = create_signed_value(
-            SignedValueTest.SECRET, "key", "value", clock=self.present
-        )
-        self.assertEqual(signed_default, signed_v2)
-
-        decoded_v1 = decode_signed_value(
-            SignedValueTest.SECRET, "key", signed_v1, min_version=1, clock=self.present
-        )
-        self.assertEqual(decoded_v1, b"value")
-
-        decoded_v2 = decode_signed_value(
-            SignedValueTest.SECRET, "key", signed_v2, min_version=2, clock=self.present
-        )
-        self.assertEqual(decoded_v2, b"value")
-
-    def test_name_swap(self):
-        signed1 = create_signed_value(
-            SignedValueTest.SECRET, "key1", "value", clock=self.present
-        )
-        signed2 = create_signed_value(
-            SignedValueTest.SECRET, "key2", "value", clock=self.present
-        )
-        # Try decoding each string with the other's "name"
-        decoded1 = decode_signed_value(
-            SignedValueTest.SECRET, "key2", signed1, clock=self.present
-        )
-        self.assertIs(decoded1, None)
-        decoded2 = decode_signed_value(
-            SignedValueTest.SECRET, "key1", signed2, clock=self.present
-        )
-        self.assertIs(decoded2, None)
-
-    def test_expired(self):
-        signed = create_signed_value(
-            SignedValueTest.SECRET, "key1", "value", clock=self.past
-        )
-        decoded_past = decode_signed_value(
-            SignedValueTest.SECRET, "key1", signed, clock=self.past
-        )
-        self.assertEqual(decoded_past, b"value")
-        decoded_present = decode_signed_value(
-            SignedValueTest.SECRET, "key1", signed, clock=self.present
-        )
-        self.assertIs(decoded_present, None)
-
-    def test_payload_tampering(self):
-        # These cookies are variants of the one in test_known_values.
-        sig = "3d4e60b996ff9c5d5788e333a0cba6f238a22c6c0f94788870e1a9ecd482e152"
-
-        def validate(prefix):
-            return b"value" == decode_signed_value(
-                SignedValueTest.SECRET, "key", prefix + sig, clock=self.present
-            )
-
-        self.assertTrue(validate("2|1:0|10:1300000000|3:key|8:dmFsdWU=|"))
-        # Change key version
-        self.assertFalse(validate("2|1:1|10:1300000000|3:key|8:dmFsdWU=|"))
-        # length mismatch (field too short)
-        self.assertFalse(validate("2|1:0|10:130000000|3:key|8:dmFsdWU=|"))
-        # length mismatch (field too long)
-        self.assertFalse(validate("2|1:0|10:1300000000|3:keey|8:dmFsdWU=|"))
-
-    def test_signature_tampering(self):
-        prefix = "2|1:0|10:1300000000|3:key|8:dmFsdWU=|"
-
-        def validate(sig):
-            return b"value" == decode_signed_value(
-                SignedValueTest.SECRET, "key", prefix + sig, clock=self.present
-            )
-
-        self.assertTrue(
-            validate("3d4e60b996ff9c5d5788e333a0cba6f238a22c6c0f94788870e1a9ecd482e152")
-        )
-        # All zeros
-        self.assertFalse(validate("0" * 32))
-        # Change one character
-        self.assertFalse(
-            validate("4d4e60b996ff9c5d5788e333a0cba6f238a22c6c0f94788870e1a9ecd482e152")
-        )
-        # Change another character
-        self.assertFalse(
-            validate("3d4e60b996ff9c5d5788e333a0cba6f238a22c6c0f94788870e1a9ecd482e153")
-        )
-        # Truncate
-        self.assertFalse(
-            validate("3d4e60b996ff9c5d5788e333a0cba6f238a22c6c0f94788870e1a9ecd482e15")
-        )
-        # Lengthen
-        self.assertFalse(
-            validate(
-                "3d4e60b996ff9c5d5788e333a0cba6f238a22c6c0f94788870e1a9ecd482e1538"
-            )
-        )
-
-    def test_non_ascii(self):
-        value = b"\xe9"
-        signed = create_signed_value(
-            SignedValueTest.SECRET, "key", value, clock=self.present
-        )
-        decoded = decode_signed_value(
-            SignedValueTest.SECRET, "key", signed, clock=self.present
-        )
-        self.assertEqual(value, decoded)
-
-    def test_key_versioning_read_write_default_key(self):
-        value = b"\xe9"
-        signed = create_signed_value(
-            SignedValueTest.SECRET_DICT, "key", value, clock=self.present, key_version=0
-        )
-        decoded = decode_signed_value(
-            SignedValueTest.SECRET_DICT, "key", signed, clock=self.present
-        )
-        self.assertEqual(value, decoded)
-
-    def test_key_versioning_read_write_non_default_key(self):
-        value = b"\xe9"
-        signed = create_signed_value(
-            SignedValueTest.SECRET_DICT, "key", value, clock=self.present, key_version=1
-        )
-        decoded = decode_signed_value(
-            SignedValueTest.SECRET_DICT, "key", signed, clock=self.present
-        )
-        self.assertEqual(value, decoded)
-
-    def test_key_versioning_invalid_key(self):
-        value = b"\xe9"
-        signed = create_signed_value(
-            SignedValueTest.SECRET_DICT, "key", value, clock=self.present, key_version=0
-        )
-        newkeys = SignedValueTest.SECRET_DICT.copy()
-        newkeys.pop(0)
-        decoded = decode_signed_value(newkeys, "key", signed, clock=self.present)
-        self.assertEqual(None, decoded)
-
-    def test_key_version_retrieval(self):
-        value = b"\xe9"
-        signed = create_signed_value(
-            SignedValueTest.SECRET_DICT, "key", value, clock=self.present, key_version=1
-        )
-        key_version = get_signature_key_version(signed)
-        self.assertEqual(1, key_version)
-
-
-class XSRFTest(SimpleHandlerTestCase):
-    class Handler(RequestHandler):
-        def get(self):
-            version = int(self.get_argument("version", "2"))
-            # This would be a bad idea in a real app, but in this test
-            # it's fine.
-            self.settings["xsrf_cookie_version"] = version
-            self.write(self.xsrf_token)
-
-        def post(self):
-            self.write("ok")
-
-    def get_app_kwargs(self):
-        return dict(xsrf_cookies=True)
-
-    def setUp(self):
-        super(XSRFTest, self).setUp()
-        self.xsrf_token = self.get_token()
-
-    def get_token(self, old_token=None, version=None):
-        if old_token is not None:
-            headers = self.cookie_headers(old_token)
-        else:
-            headers = None
-        response = self.fetch(
-            "/" if version is None else ("/?version=%d" % version), headers=headers
-        )
-        response.rethrow()
-        return native_str(response.body)
-
-    def cookie_headers(self, token=None):
-        if token is None:
-            token = self.xsrf_token
-        return {"Cookie": "_xsrf=" + token}
-
-    def test_xsrf_fail_no_token(self):
-        with ExpectLog(gen_log, ".*'_xsrf' argument missing"):
-            response = self.fetch("/", method="POST", body=b"")
-        self.assertEqual(response.code, 403)
-
-    def test_xsrf_fail_body_no_cookie(self):
-        with ExpectLog(gen_log, ".*XSRF cookie does not match POST"):
-            response = self.fetch(
-                "/",
-                method="POST",
-                body=urllib.parse.urlencode(dict(_xsrf=self.xsrf_token)),
-            )
-        self.assertEqual(response.code, 403)
-
-    def test_xsrf_fail_argument_invalid_format(self):
-        with ExpectLog(gen_log, ".*'_xsrf' argument has invalid format"):
-            response = self.fetch(
-                "/",
-                method="POST",
-                headers=self.cookie_headers(),
-                body=urllib.parse.urlencode(dict(_xsrf="3|")),
-            )
-        self.assertEqual(response.code, 403)
-
-    def test_xsrf_fail_cookie_invalid_format(self):
-        with ExpectLog(gen_log, ".*XSRF cookie does not match POST"):
-            response = self.fetch(
-                "/",
-                method="POST",
-                headers=self.cookie_headers(token="3|"),
-                body=urllib.parse.urlencode(dict(_xsrf=self.xsrf_token)),
-            )
-        self.assertEqual(response.code, 403)
-
-    def test_xsrf_fail_cookie_no_body(self):
-        with ExpectLog(gen_log, ".*'_xsrf' argument missing"):
-            response = self.fetch(
-                "/", method="POST", body=b"", headers=self.cookie_headers()
-            )
-        self.assertEqual(response.code, 403)
-
-    def test_xsrf_success_short_token(self):
-        response = self.fetch(
-            "/",
-            method="POST",
-            body=urllib.parse.urlencode(dict(_xsrf="deadbeef")),
-            headers=self.cookie_headers(token="deadbeef"),
-        )
-        self.assertEqual(response.code, 200)
-
-    def test_xsrf_success_non_hex_token(self):
-        response = self.fetch(
-            "/",
-            method="POST",
-            body=urllib.parse.urlencode(dict(_xsrf="xoxo")),
-            headers=self.cookie_headers(token="xoxo"),
-        )
-        self.assertEqual(response.code, 200)
-
-    def test_xsrf_success_post_body(self):
-        response = self.fetch(
-            "/",
-            method="POST",
-            body=urllib.parse.urlencode(dict(_xsrf=self.xsrf_token)),
-            headers=self.cookie_headers(),
-        )
-        self.assertEqual(response.code, 200)
-
-    def test_xsrf_success_query_string(self):
-        response = self.fetch(
-            "/?" + urllib.parse.urlencode(dict(_xsrf=self.xsrf_token)),
-            method="POST",
-            body=b"",
-            headers=self.cookie_headers(),
-        )
-        self.assertEqual(response.code, 200)
-
-    def test_xsrf_success_header(self):
-        response = self.fetch(
-            "/",
-            method="POST",
-            body=b"",
-            headers=dict(
-                {"X-Xsrftoken": self.xsrf_token},  # type: ignore
-                **self.cookie_headers()
-            ),
-        )
-        self.assertEqual(response.code, 200)
-
-    def test_distinct_tokens(self):
-        # Every request gets a distinct token.
-        NUM_TOKENS = 10
-        tokens = set()
-        for i in range(NUM_TOKENS):
-            tokens.add(self.get_token())
-        self.assertEqual(len(tokens), NUM_TOKENS)
-
-    def test_cross_user(self):
-        token2 = self.get_token()
-        # Each token can be used to authenticate its own request.
-        for token in (self.xsrf_token, token2):
-            response = self.fetch(
-                "/",
-                method="POST",
-                body=urllib.parse.urlencode(dict(_xsrf=token)),
-                headers=self.cookie_headers(token),
-            )
-            self.assertEqual(response.code, 200)
-        # Sending one in the cookie and the other in the body is not allowed.
-        for cookie_token, body_token in (
-            (self.xsrf_token, token2),
-            (token2, self.xsrf_token),
-        ):
-            with ExpectLog(gen_log, ".*XSRF cookie does not match POST"):
-                response = self.fetch(
-                    "/",
-                    method="POST",
-                    body=urllib.parse.urlencode(dict(_xsrf=body_token)),
-                    headers=self.cookie_headers(cookie_token),
-                )
-            self.assertEqual(response.code, 403)
-
-    def test_refresh_token(self):
-        token = self.xsrf_token
-        tokens_seen = set([token])
-        # A user's token is stable over time.  Refreshing the page in one tab
-        # might update the cookie while an older tab still has the old cookie
-        # in its DOM.  Simulate this scenario by passing a constant token
-        # in the body and re-querying for the token.
-        for i in range(5):
-            token = self.get_token(token)
-            # Tokens are encoded uniquely each time
-            tokens_seen.add(token)
-            response = self.fetch(
-                "/",
-                method="POST",
-                body=urllib.parse.urlencode(dict(_xsrf=self.xsrf_token)),
-                headers=self.cookie_headers(token),
-            )
-            self.assertEqual(response.code, 200)
-        self.assertEqual(len(tokens_seen), 6)
-
-    def test_versioning(self):
-        # Version 1 still produces distinct tokens per request.
-        self.assertNotEqual(self.get_token(version=1), self.get_token(version=1))
-
-        # Refreshed v1 tokens are all identical.
-        v1_token = self.get_token(version=1)
-        for i in range(5):
-            self.assertEqual(self.get_token(v1_token, version=1), v1_token)
-
-        # Upgrade to a v2 version of the same token
-        v2_token = self.get_token(v1_token)
-        self.assertNotEqual(v1_token, v2_token)
-        # Each v1 token can map to many v2 tokens.
-        self.assertNotEqual(v2_token, self.get_token(v1_token))
-
-        # The tokens are cross-compatible.
-        for cookie_token, body_token in ((v1_token, v2_token), (v2_token, v1_token)):
-            response = self.fetch(
-                "/",
-                method="POST",
-                body=urllib.parse.urlencode(dict(_xsrf=body_token)),
-                headers=self.cookie_headers(cookie_token),
-            )
-            self.assertEqual(response.code, 200)
-
-
-class XSRFCookieKwargsTest(SimpleHandlerTestCase):
-    class Handler(RequestHandler):
-        def get(self):
-            self.write(self.xsrf_token)
-
-    def get_app_kwargs(self):
-        return dict(
-            xsrf_cookies=True, xsrf_cookie_kwargs=dict(httponly=True, expires_days=2)
-        )
-
-    def test_xsrf_httponly(self):
-        response = self.fetch("/")
-        self.assertIn("httponly;", response.headers["Set-Cookie"].lower())
-        self.assertIn("expires=", response.headers["Set-Cookie"].lower())
-        header = response.headers.get("Set-Cookie")
-        match = re.match(".*; expires=(?P<expires>.+);.*", header)
-        assert match is not None
-
-        expires = datetime.datetime.utcnow() + datetime.timedelta(days=2)
-        parsed = email.utils.parsedate(match.groupdict()["expires"])
-        assert parsed is not None
-        header_expires = datetime.datetime(*parsed[:6])
-        self.assertTrue(abs((expires - header_expires).total_seconds()) < 10)
-
-
-class FinishExceptionTest(SimpleHandlerTestCase):
-    class Handler(RequestHandler):
-        def get(self):
-            self.set_status(401)
-            self.set_header("WWW-Authenticate", 'Basic realm="something"')
-            if self.get_argument("finish_value", ""):
-                raise Finish("authentication required")
-            else:
-                self.write("authentication required")
-                raise Finish()
-
-    def test_finish_exception(self):
-        for u in ["/", "/?finish_value=1"]:
-            response = self.fetch(u)
-            self.assertEqual(response.code, 401)
-            self.assertEqual(
-                'Basic realm="something"', response.headers.get("WWW-Authenticate")
-            )
-            self.assertEqual(b"authentication required", response.body)
-
-
-class DecoratorTest(WebTestCase):
-    def get_handlers(self):
-        class RemoveSlashHandler(RequestHandler):
-            @removeslash
-            def get(self):
-                pass
-
-        class AddSlashHandler(RequestHandler):
-            @addslash
-            def get(self):
-                pass
-
-        return [("/removeslash/", RemoveSlashHandler), ("/addslash", AddSlashHandler)]
-
-    def test_removeslash(self):
-        response = self.fetch("/removeslash/", follow_redirects=False)
-        self.assertEqual(response.code, 301)
-        self.assertEqual(response.headers["Location"], "/removeslash")
-
-        response = self.fetch("/removeslash/?foo=bar", follow_redirects=False)
-        self.assertEqual(response.code, 301)
-        self.assertEqual(response.headers["Location"], "/removeslash?foo=bar")
-
-    def test_addslash(self):
-        response = self.fetch("/addslash", follow_redirects=False)
-        self.assertEqual(response.code, 301)
-        self.assertEqual(response.headers["Location"], "/addslash/")
-
-        response = self.fetch("/addslash?foo=bar", follow_redirects=False)
-        self.assertEqual(response.code, 301)
-        self.assertEqual(response.headers["Location"], "/addslash/?foo=bar")
-
-
-class CacheTest(WebTestCase):
-    def get_handlers(self):
-        class EtagHandler(RequestHandler):
-            def get(self, computed_etag):
-                self.write(computed_etag)
-
-            def compute_etag(self):
-                return self._write_buffer[0]
-
-        return [("/etag/(.*)", EtagHandler)]
-
-    def test_wildcard_etag(self):
-        computed_etag = '"xyzzy"'
-        etags = "*"
-        self._test_etag(computed_etag, etags, 304)
-
-    def test_strong_etag_match(self):
-        computed_etag = '"xyzzy"'
-        etags = '"xyzzy"'
-        self._test_etag(computed_etag, etags, 304)
-
-    def test_multiple_strong_etag_match(self):
-        computed_etag = '"xyzzy1"'
-        etags = '"xyzzy1", "xyzzy2"'
-        self._test_etag(computed_etag, etags, 304)
-
-    def test_strong_etag_not_match(self):
-        computed_etag = '"xyzzy"'
-        etags = '"xyzzy1"'
-        self._test_etag(computed_etag, etags, 200)
-
-    def test_multiple_strong_etag_not_match(self):
-        computed_etag = '"xyzzy"'
-        etags = '"xyzzy1", "xyzzy2"'
-        self._test_etag(computed_etag, etags, 200)
-
-    def test_weak_etag_match(self):
-        computed_etag = '"xyzzy1"'
-        etags = 'W/"xyzzy1"'
-        self._test_etag(computed_etag, etags, 304)
-
-    def test_multiple_weak_etag_match(self):
-        computed_etag = '"xyzzy2"'
-        etags = 'W/"xyzzy1", W/"xyzzy2"'
-        self._test_etag(computed_etag, etags, 304)
-
-    def test_weak_etag_not_match(self):
-        computed_etag = '"xyzzy2"'
-        etags = 'W/"xyzzy1"'
-        self._test_etag(computed_etag, etags, 200)
-
-    def test_multiple_weak_etag_not_match(self):
-        computed_etag = '"xyzzy3"'
-        etags = 'W/"xyzzy1", W/"xyzzy2"'
-        self._test_etag(computed_etag, etags, 200)
-
-    def _test_etag(self, computed_etag, etags, status_code):
-        response = self.fetch(
-            "/etag/" + computed_etag, headers={"If-None-Match": etags}
-        )
-        self.assertEqual(response.code, status_code)
-
-
-class RequestSummaryTest(SimpleHandlerTestCase):
-    class Handler(RequestHandler):
-        def get(self):
-            # remote_ip is optional, although it's set by
-            # both HTTPServer and WSGIAdapter.
-            # Clobber it to make sure it doesn't break logging.
-            self.request.remote_ip = None
-            self.finish(self._request_summary())
-
-    def test_missing_remote_ip(self):
-        resp = self.fetch("/")
-        self.assertEqual(resp.body, b"GET / (None)")
-
-
-class HTTPErrorTest(unittest.TestCase):
-    def test_copy(self):
-        e = HTTPError(403, reason="Go away")
-        e2 = copy.copy(e)
-        self.assertIsNot(e, e2)
-        self.assertEqual(e.status_code, e2.status_code)
-        self.assertEqual(e.reason, e2.reason)
-
-
-class ApplicationTest(AsyncTestCase):
-    def test_listen(self):
-        app = Application([])
-        server = app.listen(0, address="127.0.0.1")
-        server.stop()
-
-
-class URLSpecReverseTest(unittest.TestCase):
-    def test_reverse(self):
-        self.assertEqual("/favicon.ico", url(r"/favicon\.ico", None).reverse())
-        self.assertEqual("/favicon.ico", url(r"^/favicon\.ico$", None).reverse())
-
-    def test_non_reversible(self):
-        # URLSpecs are non-reversible if they include non-constant
-        # regex features outside capturing groups. Currently, this is
-        # only strictly enforced for backslash-escaped character
-        # classes.
-        paths = [r"^/api/v\d+/foo/(\w+)$"]
-        for path in paths:
-            # A URLSpec can still be created even if it cannot be reversed.
-            url_spec = url(path, None)
-            try:
-                result = url_spec.reverse()
-                self.fail(
-                    "did not get expected exception when reversing %s. "
-                    "result: %s" % (path, result)
-                )
-            except ValueError:
-                pass
-
-    def test_reverse_arguments(self):
-        self.assertEqual(
-            "/api/v1/foo/bar", url(r"^/api/v1/foo/(\w+)$", None).reverse("bar")
-        )
-
-
-class RedirectHandlerTest(WebTestCase):
-    def get_handlers(self):
-        return [
-            ("/src", WebRedirectHandler, {"url": "/dst"}),
-            ("/src2", WebRedirectHandler, {"url": "/dst2?foo=bar"}),
-            (r"/(.*?)/(.*?)/(.*)", WebRedirectHandler, {"url": "/{1}/{0}/{2}"}),
-        ]
-
-    def test_basic_redirect(self):
-        response = self.fetch("/src", follow_redirects=False)
-        self.assertEqual(response.code, 301)
-        self.assertEqual(response.headers["Location"], "/dst")
-
-    def test_redirect_with_argument(self):
-        response = self.fetch("/src?foo=bar", follow_redirects=False)
-        self.assertEqual(response.code, 301)
-        self.assertEqual(response.headers["Location"], "/dst?foo=bar")
-
-    def test_redirect_with_appending_argument(self):
-        response = self.fetch("/src2?foo2=bar2", follow_redirects=False)
-        self.assertEqual(response.code, 301)
-        self.assertEqual(response.headers["Location"], "/dst2?foo=bar&foo2=bar2")
-
-    def test_redirect_pattern(self):
-        response = self.fetch("/a/b/c", follow_redirects=False)
-        self.assertEqual(response.code, 301)
-        self.assertEqual(response.headers["Location"], "/b/a/c")
diff --git a/venv/lib/python3.7/site-packages/tornado/test/websocket_test.py b/venv/lib/python3.7/site-packages/tornado/test/websocket_test.py
deleted file mode 100644
index d4b7a74..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/websocket_test.py
+++ /dev/null
@@ -1,822 +0,0 @@
-import asyncio
-import functools
-import traceback
-import unittest
-
-from tornado.concurrent import Future
-from tornado import gen
-from tornado.httpclient import HTTPError, HTTPRequest
-from tornado.locks import Event
-from tornado.log import gen_log, app_log
-from tornado.simple_httpclient import SimpleAsyncHTTPClient
-from tornado.template import DictLoader
-from tornado.testing import AsyncHTTPTestCase, gen_test, bind_unused_port, ExpectLog
-from tornado.web import Application, RequestHandler
-
-try:
-    import tornado.websocket  # noqa: F401
-    from tornado.util import _websocket_mask_python
-except ImportError:
-    # The unittest module presents misleading errors on ImportError
-    # (it acts as if websocket_test could not be found, hiding the underlying
-    # error).  If we get an ImportError here (which could happen due to
-    # TORNADO_EXTENSION=1), print some extra information before failing.
-    traceback.print_exc()
-    raise
-
-from tornado.websocket import (
-    WebSocketHandler,
-    websocket_connect,
-    WebSocketError,
-    WebSocketClosedError,
-)
-
-try:
-    from tornado import speedups
-except ImportError:
-    speedups = None  # type: ignore
-
-
-class TestWebSocketHandler(WebSocketHandler):
-    """Base class for testing handlers that exposes the on_close event.
-
-    This allows for tests to see the close code and reason on the
-    server side.
-
-    """
-
-    def initialize(self, close_future=None, compression_options=None):
-        self.close_future = close_future
-        self.compression_options = compression_options
-
-    def get_compression_options(self):
-        return self.compression_options
-
-    def on_close(self):
-        if self.close_future is not None:
-            self.close_future.set_result((self.close_code, self.close_reason))
-
-
-class EchoHandler(TestWebSocketHandler):
-    @gen.coroutine
-    def on_message(self, message):
-        try:
-            yield self.write_message(message, isinstance(message, bytes))
-        except asyncio.CancelledError:
-            pass
-        except WebSocketClosedError:
-            pass
-
-
-class ErrorInOnMessageHandler(TestWebSocketHandler):
-    def on_message(self, message):
-        1 / 0
-
-
-class HeaderHandler(TestWebSocketHandler):
-    def open(self):
-        methods_to_test = [
-            functools.partial(self.write, "This should not work"),
-            functools.partial(self.redirect, "http://localhost/elsewhere"),
-            functools.partial(self.set_header, "X-Test", ""),
-            functools.partial(self.set_cookie, "Chocolate", "Chip"),
-            functools.partial(self.set_status, 503),
-            self.flush,
-            self.finish,
-        ]
-        for method in methods_to_test:
-            try:
-                # In a websocket context, many RequestHandler methods
-                # raise RuntimeErrors.
-                method()
-                raise Exception("did not get expected exception")
-            except RuntimeError:
-                pass
-        self.write_message(self.request.headers.get("X-Test", ""))
-
-
-class HeaderEchoHandler(TestWebSocketHandler):
-    def set_default_headers(self):
-        self.set_header("X-Extra-Response-Header", "Extra-Response-Value")
-
-    def prepare(self):
-        for k, v in self.request.headers.get_all():
-            if k.lower().startswith("x-test"):
-                self.set_header(k, v)
-
-
-class NonWebSocketHandler(RequestHandler):
-    def get(self):
-        self.write("ok")
-
-
-class CloseReasonHandler(TestWebSocketHandler):
-    def open(self):
-        self.on_close_called = False
-        self.close(1001, "goodbye")
-
-
-class AsyncPrepareHandler(TestWebSocketHandler):
-    @gen.coroutine
-    def prepare(self):
-        yield gen.moment
-
-    def on_message(self, message):
-        self.write_message(message)
-
-
-class PathArgsHandler(TestWebSocketHandler):
-    def open(self, arg):
-        self.write_message(arg)
-
-
-class CoroutineOnMessageHandler(TestWebSocketHandler):
-    def initialize(self, **kwargs):
-        super(CoroutineOnMessageHandler, self).initialize(**kwargs)
-        self.sleeping = 0
-
-    @gen.coroutine
-    def on_message(self, message):
-        if self.sleeping > 0:
-            self.write_message("another coroutine is already sleeping")
-        self.sleeping += 1
-        yield gen.sleep(0.01)
-        self.sleeping -= 1
-        self.write_message(message)
-
-
-class RenderMessageHandler(TestWebSocketHandler):
-    def on_message(self, message):
-        self.write_message(self.render_string("message.html", message=message))
-
-
-class SubprotocolHandler(TestWebSocketHandler):
-    def initialize(self, **kwargs):
-        super(SubprotocolHandler, self).initialize(**kwargs)
-        self.select_subprotocol_called = False
-
-    def select_subprotocol(self, subprotocols):
-        if self.select_subprotocol_called:
-            raise Exception("select_subprotocol called twice")
-        self.select_subprotocol_called = True
-        if "goodproto" in subprotocols:
-            return "goodproto"
-        return None
-
-    def open(self):
-        if not self.select_subprotocol_called:
-            raise Exception("select_subprotocol not called")
-        self.write_message("subprotocol=%s" % self.selected_subprotocol)
-
-
-class OpenCoroutineHandler(TestWebSocketHandler):
-    def initialize(self, test, **kwargs):
-        super(OpenCoroutineHandler, self).initialize(**kwargs)
-        self.test = test
-        self.open_finished = False
-
-    @gen.coroutine
-    def open(self):
-        yield self.test.message_sent.wait()
-        yield gen.sleep(0.010)
-        self.open_finished = True
-
-    def on_message(self, message):
-        if not self.open_finished:
-            raise Exception("on_message called before open finished")
-        self.write_message("ok")
-
-
-class ErrorInOpenHandler(TestWebSocketHandler):
-    def open(self):
-        raise Exception("boom")
-
-
-class ErrorInAsyncOpenHandler(TestWebSocketHandler):
-    async def open(self):
-        await asyncio.sleep(0)
-        raise Exception("boom")
-
-
-class NoDelayHandler(TestWebSocketHandler):
-    def open(self):
-        self.set_nodelay(True)
-        self.write_message("hello")
-
-
-class WebSocketBaseTestCase(AsyncHTTPTestCase):
-    @gen.coroutine
-    def ws_connect(self, path, **kwargs):
-        ws = yield websocket_connect(
-            "ws://127.0.0.1:%d%s" % (self.get_http_port(), path), **kwargs
-        )
-        raise gen.Return(ws)
-
-
-class WebSocketTest(WebSocketBaseTestCase):
-    def get_app(self):
-        self.close_future = Future()  # type: Future[None]
-        return Application(
-            [
-                ("/echo", EchoHandler, dict(close_future=self.close_future)),
-                ("/non_ws", NonWebSocketHandler),
-                ("/header", HeaderHandler, dict(close_future=self.close_future)),
-                (
-                    "/header_echo",
-                    HeaderEchoHandler,
-                    dict(close_future=self.close_future),
-                ),
-                (
-                    "/close_reason",
-                    CloseReasonHandler,
-                    dict(close_future=self.close_future),
-                ),
-                (
-                    "/error_in_on_message",
-                    ErrorInOnMessageHandler,
-                    dict(close_future=self.close_future),
-                ),
-                (
-                    "/async_prepare",
-                    AsyncPrepareHandler,
-                    dict(close_future=self.close_future),
-                ),
-                (
-                    "/path_args/(.*)",
-                    PathArgsHandler,
-                    dict(close_future=self.close_future),
-                ),
-                (
-                    "/coroutine",
-                    CoroutineOnMessageHandler,
-                    dict(close_future=self.close_future),
-                ),
-                ("/render", RenderMessageHandler, dict(close_future=self.close_future)),
-                (
-                    "/subprotocol",
-                    SubprotocolHandler,
-                    dict(close_future=self.close_future),
-                ),
-                (
-                    "/open_coroutine",
-                    OpenCoroutineHandler,
-                    dict(close_future=self.close_future, test=self),
-                ),
-                ("/error_in_open", ErrorInOpenHandler),
-                ("/error_in_async_open", ErrorInAsyncOpenHandler),
-                ("/nodelay", NoDelayHandler),
-            ],
-            template_loader=DictLoader({"message.html": "<b>{{ message }}</b>"}),
-        )
-
-    def get_http_client(self):
-        # These tests require HTTP/1; force the use of SimpleAsyncHTTPClient.
-        return SimpleAsyncHTTPClient()
-
-    def tearDown(self):
-        super(WebSocketTest, self).tearDown()
-        RequestHandler._template_loaders.clear()
-
-    def test_http_request(self):
-        # WS server, HTTP client.
-        response = self.fetch("/echo")
-        self.assertEqual(response.code, 400)
-
-    def test_missing_websocket_key(self):
-        response = self.fetch(
-            "/echo",
-            headers={
-                "Connection": "Upgrade",
-                "Upgrade": "WebSocket",
-                "Sec-WebSocket-Version": "13",
-            },
-        )
-        self.assertEqual(response.code, 400)
-
-    def test_bad_websocket_version(self):
-        response = self.fetch(
-            "/echo",
-            headers={
-                "Connection": "Upgrade",
-                "Upgrade": "WebSocket",
-                "Sec-WebSocket-Version": "12",
-            },
-        )
-        self.assertEqual(response.code, 426)
-
-    @gen_test
-    def test_websocket_gen(self):
-        ws = yield self.ws_connect("/echo")
-        yield ws.write_message("hello")
-        response = yield ws.read_message()
-        self.assertEqual(response, "hello")
-
-    def test_websocket_callbacks(self):
-        websocket_connect(
-            "ws://127.0.0.1:%d/echo" % self.get_http_port(), callback=self.stop
-        )
-        ws = self.wait().result()
-        ws.write_message("hello")
-        ws.read_message(self.stop)
-        response = self.wait().result()
-        self.assertEqual(response, "hello")
-        self.close_future.add_done_callback(lambda f: self.stop())
-        ws.close()
-        self.wait()
-
-    @gen_test
-    def test_binary_message(self):
-        ws = yield self.ws_connect("/echo")
-        ws.write_message(b"hello \xe9", binary=True)
-        response = yield ws.read_message()
-        self.assertEqual(response, b"hello \xe9")
-
-    @gen_test
-    def test_unicode_message(self):
-        ws = yield self.ws_connect("/echo")
-        ws.write_message(u"hello \u00e9")
-        response = yield ws.read_message()
-        self.assertEqual(response, u"hello \u00e9")
-
-    @gen_test
-    def test_render_message(self):
-        ws = yield self.ws_connect("/render")
-        ws.write_message("hello")
-        response = yield ws.read_message()
-        self.assertEqual(response, "<b>hello</b>")
-
-    @gen_test
-    def test_error_in_on_message(self):
-        ws = yield self.ws_connect("/error_in_on_message")
-        ws.write_message("hello")
-        with ExpectLog(app_log, "Uncaught exception"):
-            response = yield ws.read_message()
-        self.assertIs(response, None)
-
-    @gen_test
-    def test_websocket_http_fail(self):
-        with self.assertRaises(HTTPError) as cm:
-            yield self.ws_connect("/notfound")
-        self.assertEqual(cm.exception.code, 404)
-
-    @gen_test
-    def test_websocket_http_success(self):
-        with self.assertRaises(WebSocketError):
-            yield self.ws_connect("/non_ws")
-
-    @gen_test
-    def test_websocket_network_fail(self):
-        sock, port = bind_unused_port()
-        sock.close()
-        with self.assertRaises(IOError):
-            with ExpectLog(gen_log, ".*"):
-                yield websocket_connect(
-                    "ws://127.0.0.1:%d/" % port, connect_timeout=3600
-                )
-
-    @gen_test
-    def test_websocket_close_buffered_data(self):
-        ws = yield websocket_connect("ws://127.0.0.1:%d/echo" % self.get_http_port())
-        ws.write_message("hello")
-        ws.write_message("world")
-        # Close the underlying stream.
-        ws.stream.close()
-
-    @gen_test
-    def test_websocket_headers(self):
-        # Ensure that arbitrary headers can be passed through websocket_connect.
-        ws = yield websocket_connect(
-            HTTPRequest(
-                "ws://127.0.0.1:%d/header" % self.get_http_port(),
-                headers={"X-Test": "hello"},
-            )
-        )
-        response = yield ws.read_message()
-        self.assertEqual(response, "hello")
-
-    @gen_test
-    def test_websocket_header_echo(self):
-        # Ensure that headers can be returned in the response.
-        # Specifically, that arbitrary headers passed through websocket_connect
-        # can be returned.
-        ws = yield websocket_connect(
-            HTTPRequest(
-                "ws://127.0.0.1:%d/header_echo" % self.get_http_port(),
-                headers={"X-Test-Hello": "hello"},
-            )
-        )
-        self.assertEqual(ws.headers.get("X-Test-Hello"), "hello")
-        self.assertEqual(
-            ws.headers.get("X-Extra-Response-Header"), "Extra-Response-Value"
-        )
-
-    @gen_test
-    def test_server_close_reason(self):
-        ws = yield self.ws_connect("/close_reason")
-        msg = yield ws.read_message()
-        # A message of None means the other side closed the connection.
-        self.assertIs(msg, None)
-        self.assertEqual(ws.close_code, 1001)
-        self.assertEqual(ws.close_reason, "goodbye")
-        # The on_close callback is called no matter which side closed.
-        code, reason = yield self.close_future
-        # The client echoed the close code it received to the server,
-        # so the server's close code (returned via close_future) is
-        # the same.
-        self.assertEqual(code, 1001)
-
-    @gen_test
-    def test_client_close_reason(self):
-        ws = yield self.ws_connect("/echo")
-        ws.close(1001, "goodbye")
-        code, reason = yield self.close_future
-        self.assertEqual(code, 1001)
-        self.assertEqual(reason, "goodbye")
-
-    @gen_test
-    def test_write_after_close(self):
-        ws = yield self.ws_connect("/close_reason")
-        msg = yield ws.read_message()
-        self.assertIs(msg, None)
-        with self.assertRaises(WebSocketClosedError):
-            ws.write_message("hello")
-
-    @gen_test
-    def test_async_prepare(self):
-        # Previously, an async prepare method triggered a bug that would
-        # result in a timeout on test shutdown (and a memory leak).
-        ws = yield self.ws_connect("/async_prepare")
-        ws.write_message("hello")
-        res = yield ws.read_message()
-        self.assertEqual(res, "hello")
-
-    @gen_test
-    def test_path_args(self):
-        ws = yield self.ws_connect("/path_args/hello")
-        res = yield ws.read_message()
-        self.assertEqual(res, "hello")
-
-    @gen_test
-    def test_coroutine(self):
-        ws = yield self.ws_connect("/coroutine")
-        # Send both messages immediately, coroutine must process one at a time.
-        yield ws.write_message("hello1")
-        yield ws.write_message("hello2")
-        res = yield ws.read_message()
-        self.assertEqual(res, "hello1")
-        res = yield ws.read_message()
-        self.assertEqual(res, "hello2")
-
-    @gen_test
-    def test_check_origin_valid_no_path(self):
-        port = self.get_http_port()
-
-        url = "ws://127.0.0.1:%d/echo" % port
-        headers = {"Origin": "http://127.0.0.1:%d" % port}
-
-        ws = yield websocket_connect(HTTPRequest(url, headers=headers))
-        ws.write_message("hello")
-        response = yield ws.read_message()
-        self.assertEqual(response, "hello")
-
-    @gen_test
-    def test_check_origin_valid_with_path(self):
-        port = self.get_http_port()
-
-        url = "ws://127.0.0.1:%d/echo" % port
-        headers = {"Origin": "http://127.0.0.1:%d/something" % port}
-
-        ws = yield websocket_connect(HTTPRequest(url, headers=headers))
-        ws.write_message("hello")
-        response = yield ws.read_message()
-        self.assertEqual(response, "hello")
-
-    @gen_test
-    def test_check_origin_invalid_partial_url(self):
-        port = self.get_http_port()
-
-        url = "ws://127.0.0.1:%d/echo" % port
-        headers = {"Origin": "127.0.0.1:%d" % port}
-
-        with self.assertRaises(HTTPError) as cm:
-            yield websocket_connect(HTTPRequest(url, headers=headers))
-        self.assertEqual(cm.exception.code, 403)
-
-    @gen_test
-    def test_check_origin_invalid(self):
-        port = self.get_http_port()
-
-        url = "ws://127.0.0.1:%d/echo" % port
-        # Host is 127.0.0.1, which should not be accessible from some other
-        # domain
-        headers = {"Origin": "http://somewhereelse.com"}
-
-        with self.assertRaises(HTTPError) as cm:
-            yield websocket_connect(HTTPRequest(url, headers=headers))
-
-        self.assertEqual(cm.exception.code, 403)
-
-    @gen_test
-    def test_check_origin_invalid_subdomains(self):
-        port = self.get_http_port()
-
-        url = "ws://localhost:%d/echo" % port
-        # Subdomains should be disallowed by default.  If we could pass a
-        # resolver to websocket_connect we could test sibling domains as well.
-        headers = {"Origin": "http://subtenant.localhost"}
-
-        with self.assertRaises(HTTPError) as cm:
-            yield websocket_connect(HTTPRequest(url, headers=headers))
-
-        self.assertEqual(cm.exception.code, 403)
-
-    @gen_test
-    def test_subprotocols(self):
-        ws = yield self.ws_connect(
-            "/subprotocol", subprotocols=["badproto", "goodproto"]
-        )
-        self.assertEqual(ws.selected_subprotocol, "goodproto")
-        res = yield ws.read_message()
-        self.assertEqual(res, "subprotocol=goodproto")
-
-    @gen_test
-    def test_subprotocols_not_offered(self):
-        ws = yield self.ws_connect("/subprotocol")
-        self.assertIs(ws.selected_subprotocol, None)
-        res = yield ws.read_message()
-        self.assertEqual(res, "subprotocol=None")
-
-    @gen_test
-    def test_open_coroutine(self):
-        self.message_sent = Event()
-        ws = yield self.ws_connect("/open_coroutine")
-        yield ws.write_message("hello")
-        self.message_sent.set()
-        res = yield ws.read_message()
-        self.assertEqual(res, "ok")
-
-    @gen_test
-    def test_error_in_open(self):
-        with ExpectLog(app_log, "Uncaught exception"):
-            ws = yield self.ws_connect("/error_in_open")
-            res = yield ws.read_message()
-        self.assertIsNone(res)
-
-    @gen_test
-    def test_error_in_async_open(self):
-        with ExpectLog(app_log, "Uncaught exception"):
-            ws = yield self.ws_connect("/error_in_async_open")
-            res = yield ws.read_message()
-        self.assertIsNone(res)
-
-    @gen_test
-    def test_nodelay(self):
-        ws = yield self.ws_connect("/nodelay")
-        res = yield ws.read_message()
-        self.assertEqual(res, "hello")
-
-
-class NativeCoroutineOnMessageHandler(TestWebSocketHandler):
-    def initialize(self, **kwargs):
-        super().initialize(**kwargs)
-        self.sleeping = 0
-
-    async def on_message(self, message):
-        if self.sleeping > 0:
-            self.write_message("another coroutine is already sleeping")
-        self.sleeping += 1
-        await gen.sleep(0.01)
-        self.sleeping -= 1
-        self.write_message(message)
-
-
-class WebSocketNativeCoroutineTest(WebSocketBaseTestCase):
-    def get_app(self):
-        return Application([("/native", NativeCoroutineOnMessageHandler)])
-
-    @gen_test
-    def test_native_coroutine(self):
-        ws = yield self.ws_connect("/native")
-        # Send both messages immediately, coroutine must process one at a time.
-        yield ws.write_message("hello1")
-        yield ws.write_message("hello2")
-        res = yield ws.read_message()
-        self.assertEqual(res, "hello1")
-        res = yield ws.read_message()
-        self.assertEqual(res, "hello2")
-
-
-class CompressionTestMixin(object):
-    MESSAGE = "Hello world. Testing 123 123"
-
-    def get_app(self):
-        class LimitedHandler(TestWebSocketHandler):
-            @property
-            def max_message_size(self):
-                return 1024
-
-            def on_message(self, message):
-                self.write_message(str(len(message)))
-
-        return Application(
-            [
-                (
-                    "/echo",
-                    EchoHandler,
-                    dict(compression_options=self.get_server_compression_options()),
-                ),
-                (
-                    "/limited",
-                    LimitedHandler,
-                    dict(compression_options=self.get_server_compression_options()),
-                ),
-            ]
-        )
-
-    def get_server_compression_options(self):
-        return None
-
-    def get_client_compression_options(self):
-        return None
-
-    @gen_test
-    def test_message_sizes(self):
-        ws = yield self.ws_connect(
-            "/echo", compression_options=self.get_client_compression_options()
-        )
-        # Send the same message three times so we can measure the
-        # effect of the context_takeover options.
-        for i in range(3):
-            ws.write_message(self.MESSAGE)
-            response = yield ws.read_message()
-            self.assertEqual(response, self.MESSAGE)
-        self.assertEqual(ws.protocol._message_bytes_out, len(self.MESSAGE) * 3)
-        self.assertEqual(ws.protocol._message_bytes_in, len(self.MESSAGE) * 3)
-        self.verify_wire_bytes(ws.protocol._wire_bytes_in, ws.protocol._wire_bytes_out)
-
-    @gen_test
-    def test_size_limit(self):
-        ws = yield self.ws_connect(
-            "/limited", compression_options=self.get_client_compression_options()
-        )
-        # Small messages pass through.
-        ws.write_message("a" * 128)
-        response = yield ws.read_message()
-        self.assertEqual(response, "128")
-        # This message is too big after decompression, but it compresses
-        # down to a size that will pass the initial checks.
-        ws.write_message("a" * 2048)
-        response = yield ws.read_message()
-        self.assertIsNone(response)
-
-
-class UncompressedTestMixin(CompressionTestMixin):
-    """Specialization of CompressionTestMixin when we expect no compression."""
-
-    def verify_wire_bytes(self, bytes_in, bytes_out):
-        # Bytes out includes the 4-byte mask key per message.
-        self.assertEqual(bytes_out, 3 * (len(self.MESSAGE) + 6))
-        self.assertEqual(bytes_in, 3 * (len(self.MESSAGE) + 2))
-
-
-class NoCompressionTest(UncompressedTestMixin, WebSocketBaseTestCase):
-    pass
-
-
-# If only one side tries to compress, the extension is not negotiated.
-class ServerOnlyCompressionTest(UncompressedTestMixin, WebSocketBaseTestCase):
-    def get_server_compression_options(self):
-        return {}
-
-
-class ClientOnlyCompressionTest(UncompressedTestMixin, WebSocketBaseTestCase):
-    def get_client_compression_options(self):
-        return {}
-
-
-class DefaultCompressionTest(CompressionTestMixin, WebSocketBaseTestCase):
-    def get_server_compression_options(self):
-        return {}
-
-    def get_client_compression_options(self):
-        return {}
-
-    def verify_wire_bytes(self, bytes_in, bytes_out):
-        self.assertLess(bytes_out, 3 * (len(self.MESSAGE) + 6))
-        self.assertLess(bytes_in, 3 * (len(self.MESSAGE) + 2))
-        # Bytes out includes the 4 bytes mask key per message.
-        self.assertEqual(bytes_out, bytes_in + 12)
-
-
-class MaskFunctionMixin(object):
-    # Subclasses should define self.mask(mask, data)
-    def test_mask(self):
-        self.assertEqual(self.mask(b"abcd", b""), b"")
-        self.assertEqual(self.mask(b"abcd", b"b"), b"\x03")
-        self.assertEqual(self.mask(b"abcd", b"54321"), b"TVPVP")
-        self.assertEqual(self.mask(b"ZXCV", b"98765432"), b"c`t`olpd")
-        # Include test cases with \x00 bytes (to ensure that the C
-        # extension isn't depending on null-terminated strings) and
-        # bytes with the high bit set (to smoke out signedness issues).
-        self.assertEqual(
-            self.mask(b"\x00\x01\x02\x03", b"\xff\xfb\xfd\xfc\xfe\xfa"),
-            b"\xff\xfa\xff\xff\xfe\xfb",
-        )
-        self.assertEqual(
-            self.mask(b"\xff\xfb\xfd\xfc", b"\x00\x01\x02\x03\x04\x05"),
-            b"\xff\xfa\xff\xff\xfb\xfe",
-        )
-
-
-class PythonMaskFunctionTest(MaskFunctionMixin, unittest.TestCase):
-    def mask(self, mask, data):
-        return _websocket_mask_python(mask, data)
-
-
-@unittest.skipIf(speedups is None, "tornado.speedups module not present")
-class CythonMaskFunctionTest(MaskFunctionMixin, unittest.TestCase):
-    def mask(self, mask, data):
-        return speedups.websocket_mask(mask, data)
-
-
-class ServerPeriodicPingTest(WebSocketBaseTestCase):
-    def get_app(self):
-        class PingHandler(TestWebSocketHandler):
-            def on_pong(self, data):
-                self.write_message("got pong")
-
-        return Application([("/", PingHandler)], websocket_ping_interval=0.01)
-
-    @gen_test
-    def test_server_ping(self):
-        ws = yield self.ws_connect("/")
-        for i in range(3):
-            response = yield ws.read_message()
-            self.assertEqual(response, "got pong")
-        # TODO: test that the connection gets closed if ping responses stop.
-
-
-class ClientPeriodicPingTest(WebSocketBaseTestCase):
-    def get_app(self):
-        class PingHandler(TestWebSocketHandler):
-            def on_ping(self, data):
-                self.write_message("got ping")
-
-        return Application([("/", PingHandler)])
-
-    @gen_test
-    def test_client_ping(self):
-        ws = yield self.ws_connect("/", ping_interval=0.01)
-        for i in range(3):
-            response = yield ws.read_message()
-            self.assertEqual(response, "got ping")
-        # TODO: test that the connection gets closed if ping responses stop.
-
-
-class ManualPingTest(WebSocketBaseTestCase):
-    def get_app(self):
-        class PingHandler(TestWebSocketHandler):
-            def on_ping(self, data):
-                self.write_message(data, binary=isinstance(data, bytes))
-
-        return Application([("/", PingHandler)])
-
-    @gen_test
-    def test_manual_ping(self):
-        ws = yield self.ws_connect("/")
-
-        self.assertRaises(ValueError, ws.ping, "a" * 126)
-
-        ws.ping("hello")
-        resp = yield ws.read_message()
-        # on_ping always sees bytes.
-        self.assertEqual(resp, b"hello")
-
-        ws.ping(b"binary hello")
-        resp = yield ws.read_message()
-        self.assertEqual(resp, b"binary hello")
-
-
-class MaxMessageSizeTest(WebSocketBaseTestCase):
-    def get_app(self):
-        return Application([("/", EchoHandler)], websocket_max_message_size=1024)
-
-    @gen_test
-    def test_large_message(self):
-        ws = yield self.ws_connect("/")
-
-        # Write a message that is allowed.
-        msg = "a" * 1024
-        ws.write_message(msg)
-        resp = yield ws.read_message()
-        self.assertEqual(resp, msg)
-
-        # Write a message that is too large.
-        ws.write_message(msg + "b")
-        resp = yield ws.read_message()
-        # A message of None means the other side closed the connection.
-        self.assertIs(resp, None)
-        self.assertEqual(ws.close_code, 1009)
-        self.assertEqual(ws.close_reason, "message too big")
-        # TODO: Needs tests of messages split over multiple
-        # continuation frames.
diff --git a/venv/lib/python3.7/site-packages/tornado/test/windows_test.py b/venv/lib/python3.7/site-packages/tornado/test/windows_test.py
deleted file mode 100644
index 6fe7327..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/windows_test.py
+++ /dev/null
@@ -1,24 +0,0 @@
-import functools
-import os
-import socket
-import unittest
-
-from tornado.platform.auto import set_close_exec
-
-skipIfNonWindows = unittest.skipIf(os.name != "nt", "non-windows platform")
-
-
-@skipIfNonWindows
-class WindowsTest(unittest.TestCase):
-    def test_set_close_exec(self):
-        # set_close_exec works with sockets.
-        s = socket.socket()
-        self.addCleanup(s.close)
-        set_close_exec(s.fileno())
-
-        # But it doesn't work with pipes.
-        r, w = os.pipe()
-        self.addCleanup(functools.partial(os.close, r))
-        self.addCleanup(functools.partial(os.close, w))
-        with self.assertRaises(WindowsError):
-            set_close_exec(r)
diff --git a/venv/lib/python3.7/site-packages/tornado/test/wsgi_test.py b/venv/lib/python3.7/site-packages/tornado/test/wsgi_test.py
deleted file mode 100644
index f98da5b..0000000
--- a/venv/lib/python3.7/site-packages/tornado/test/wsgi_test.py
+++ /dev/null
@@ -1,20 +0,0 @@
-from wsgiref.validate import validator
-
-from tornado.testing import AsyncHTTPTestCase
-from tornado.wsgi import WSGIContainer
-
-
-class WSGIContainerTest(AsyncHTTPTestCase):
-    # TODO: Now that WSGIAdapter is gone, this is a pretty weak test.
-    def wsgi_app(self, environ, start_response):
-        status = "200 OK"
-        response_headers = [("Content-Type", "text/plain")]
-        start_response(status, response_headers)
-        return [b"Hello world!"]
-
-    def get_app(self):
-        return WSGIContainer(validator(self.wsgi_app))
-
-    def test_simple(self):
-        response = self.fetch("/")
-        self.assertEqual(response.body, b"Hello world!")
diff --git a/venv/lib/python3.7/site-packages/tornado/testing.py b/venv/lib/python3.7/site-packages/tornado/testing.py
deleted file mode 100644
index ba13a52..0000000
--- a/venv/lib/python3.7/site-packages/tornado/testing.py
+++ /dev/null
@@ -1,790 +0,0 @@
-"""Support classes for automated testing.
-
-* `AsyncTestCase` and `AsyncHTTPTestCase`:  Subclasses of unittest.TestCase
-  with additional support for testing asynchronous (`.IOLoop`-based) code.
-
-* `ExpectLog`: Make test logs less spammy.
-
-* `main()`: A simple test runner (wrapper around unittest.main()) with support
-  for the tornado.autoreload module to rerun the tests when code changes.
-"""
-
-import asyncio
-from collections.abc import Generator
-import functools
-import inspect
-import logging
-import os
-import re
-import signal
-import socket
-import sys
-import unittest
-
-from tornado import gen
-from tornado.httpclient import AsyncHTTPClient, HTTPResponse
-from tornado.httpserver import HTTPServer
-from tornado.ioloop import IOLoop, TimeoutError
-from tornado import netutil
-from tornado.platform.asyncio import AsyncIOMainLoop
-from tornado.process import Subprocess
-from tornado.log import app_log
-from tornado.util import raise_exc_info, basestring_type
-from tornado.web import Application
-
-import typing
-from typing import Tuple, Any, Callable, Type, Dict, Union, Optional
-from types import TracebackType
-
-if typing.TYPE_CHECKING:
-    # Coroutine wasn't added to typing until 3.5.3, so only import it
-    # when mypy is running and use forward references.
-    from typing import Coroutine  # noqa: F401
-
-    _ExcInfoTuple = Tuple[
-        Optional[Type[BaseException]], Optional[BaseException], Optional[TracebackType]
-    ]
-
-
-_NON_OWNED_IOLOOPS = AsyncIOMainLoop
-
-
-def bind_unused_port(reuse_port: bool = False) -> Tuple[socket.socket, int]:
-    """Binds a server socket to an available port on localhost.
-
-    Returns a tuple (socket, port).
-
-    .. versionchanged:: 4.4
-       Always binds to ``127.0.0.1`` without resolving the name
-       ``localhost``.
-    """
-    sock = netutil.bind_sockets(
-        0, "127.0.0.1", family=socket.AF_INET, reuse_port=reuse_port
-    )[0]
-    port = sock.getsockname()[1]
-    return sock, port
-
-
-def get_async_test_timeout() -> float:
-    """Get the global timeout setting for async tests.
-
-    Returns a float, the timeout in seconds.
-
-    .. versionadded:: 3.1
-    """
-    env = os.environ.get("ASYNC_TEST_TIMEOUT")
-    if env is not None:
-        try:
-            return float(env)
-        except ValueError:
-            pass
-    return 5
-
-
-class _TestMethodWrapper(object):
-    """Wraps a test method to raise an error if it returns a value.
-
-    This is mainly used to detect undecorated generators (if a test
-    method yields it must use a decorator to consume the generator),
-    but will also detect other kinds of return values (these are not
-    necessarily errors, but we alert anyway since there is no good
-    reason to return a value from a test).
-    """
-
-    def __init__(self, orig_method: Callable) -> None:
-        self.orig_method = orig_method
-
-    def __call__(self, *args: Any, **kwargs: Any) -> None:
-        result = self.orig_method(*args, **kwargs)
-        if isinstance(result, Generator) or inspect.iscoroutine(result):
-            raise TypeError(
-                "Generator and coroutine test methods should be"
-                " decorated with tornado.testing.gen_test"
-            )
-        elif result is not None:
-            raise ValueError("Return value from test method ignored: %r" % result)
-
-    def __getattr__(self, name: str) -> Any:
-        """Proxy all unknown attributes to the original method.
-
-        This is important for some of the decorators in the `unittest`
-        module, such as `unittest.skipIf`.
-        """
-        return getattr(self.orig_method, name)
-
-
-class AsyncTestCase(unittest.TestCase):
-    """`~unittest.TestCase` subclass for testing `.IOLoop`-based
-    asynchronous code.
-
-    The unittest framework is synchronous, so the test must be
-    complete by the time the test method returns. This means that
-    asynchronous code cannot be used in quite the same way as usual
-    and must be adapted to fit. To write your tests with coroutines,
-    decorate your test methods with `tornado.testing.gen_test` instead
-    of `tornado.gen.coroutine`.
-
-    This class also provides the (deprecated) `stop()` and `wait()`
-    methods for a more manual style of testing. The test method itself
-    must call ``self.wait()``, and asynchronous callbacks should call
-    ``self.stop()`` to signal completion.
-
-    By default, a new `.IOLoop` is constructed for each test and is available
-    as ``self.io_loop``.  If the code being tested requires a
-    global `.IOLoop`, subclasses should override `get_new_ioloop` to return it.
-
-    The `.IOLoop`'s ``start`` and ``stop`` methods should not be
-    called directly.  Instead, use `self.stop <stop>` and `self.wait
-    <wait>`.  Arguments passed to ``self.stop`` are returned from
-    ``self.wait``.  It is possible to have multiple ``wait``/``stop``
-    cycles in the same test.
-
-    Example::
-
-        # This test uses coroutine style.
-        class MyTestCase(AsyncTestCase):
-            @tornado.testing.gen_test
-            def test_http_fetch(self):
-                client = AsyncHTTPClient()
-                response = yield client.fetch("http://www.tornadoweb.org")
-                # Test contents of response
-                self.assertIn("FriendFeed", response.body)
-
-        # This test uses argument passing between self.stop and self.wait.
-        class MyTestCase2(AsyncTestCase):
-            def test_http_fetch(self):
-                client = AsyncHTTPClient()
-                client.fetch("http://www.tornadoweb.org/", self.stop)
-                response = self.wait()
-                # Test contents of response
-                self.assertIn("FriendFeed", response.body)
-    """
-
-    def __init__(self, methodName: str = "runTest") -> None:
-        super(AsyncTestCase, self).__init__(methodName)
-        self.__stopped = False
-        self.__running = False
-        self.__failure = None  # type: Optional[_ExcInfoTuple]
-        self.__stop_args = None  # type: Any
-        self.__timeout = None  # type: Optional[object]
-
-        # It's easy to forget the @gen_test decorator, but if you do
-        # the test will silently be ignored because nothing will consume
-        # the generator.  Replace the test method with a wrapper that will
-        # make sure it's not an undecorated generator.
-        setattr(self, methodName, _TestMethodWrapper(getattr(self, methodName)))
-
-        # Not used in this class itself, but used by @gen_test
-        self._test_generator = None  # type: Optional[Union[Generator, Coroutine]]
-
-    def setUp(self) -> None:
-        super(AsyncTestCase, self).setUp()
-        self.io_loop = self.get_new_ioloop()
-        self.io_loop.make_current()
-
-    def tearDown(self) -> None:
-        # Native coroutines tend to produce warnings if they're not
-        # allowed to run to completion. It's difficult to ensure that
-        # this always happens in tests, so cancel any tasks that are
-        # still pending by the time we get here.
-        asyncio_loop = self.io_loop.asyncio_loop  # type: ignore
-        if hasattr(asyncio, "all_tasks"):  # py37
-            tasks = asyncio.all_tasks(asyncio_loop)  # type: ignore
-        else:
-            tasks = asyncio.Task.all_tasks(asyncio_loop)
-        # Tasks that are done may still appear here and may contain
-        # non-cancellation exceptions, so filter them out.
-        tasks = [t for t in tasks if not t.done()]
-        for t in tasks:
-            t.cancel()
-        # Allow the tasks to run and finalize themselves (which means
-        # raising a CancelledError inside the coroutine). This may
-        # just transform the "task was destroyed but it is pending"
-        # warning into a "uncaught CancelledError" warning, but
-        # catching CancelledErrors in coroutines that may leak is
-        # simpler than ensuring that no coroutines leak.
-        if tasks:
-            done, pending = self.io_loop.run_sync(lambda: asyncio.wait(tasks))
-            assert not pending
-            # If any task failed with anything but a CancelledError, raise it.
-            for f in done:
-                try:
-                    f.result()
-                except asyncio.CancelledError:
-                    pass
-
-        # Clean up Subprocess, so it can be used again with a new ioloop.
-        Subprocess.uninitialize()
-        self.io_loop.clear_current()
-        if not isinstance(self.io_loop, _NON_OWNED_IOLOOPS):
-            # Try to clean up any file descriptors left open in the ioloop.
-            # This avoids leaks, especially when tests are run repeatedly
-            # in the same process with autoreload (because curl does not
-            # set FD_CLOEXEC on its file descriptors)
-            self.io_loop.close(all_fds=True)
-        super(AsyncTestCase, self).tearDown()
-        # In case an exception escaped or the StackContext caught an exception
-        # when there wasn't a wait() to re-raise it, do so here.
-        # This is our last chance to raise an exception in a way that the
-        # unittest machinery understands.
-        self.__rethrow()
-
-    def get_new_ioloop(self) -> IOLoop:
-        """Returns the `.IOLoop` to use for this test.
-
-        By default, a new `.IOLoop` is created for each test.
-        Subclasses may override this method to return
-        `.IOLoop.current()` if it is not appropriate to use a new
-        `.IOLoop` in each tests (for example, if there are global
-        singletons using the default `.IOLoop`) or if a per-test event
-        loop is being provided by another system (such as
-        ``pytest-asyncio``).
-        """
-        return IOLoop()
-
-    def _handle_exception(
-        self, typ: Type[Exception], value: Exception, tb: TracebackType
-    ) -> bool:
-        if self.__failure is None:
-            self.__failure = (typ, value, tb)
-        else:
-            app_log.error(
-                "multiple unhandled exceptions in test", exc_info=(typ, value, tb)
-            )
-        self.stop()
-        return True
-
-    def __rethrow(self) -> None:
-        if self.__failure is not None:
-            failure = self.__failure
-            self.__failure = None
-            raise_exc_info(failure)
-
-    def run(self, result: unittest.TestResult = None) -> unittest.TestCase:
-        ret = super(AsyncTestCase, self).run(result)
-        # As a last resort, if an exception escaped super.run() and wasn't
-        # re-raised in tearDown, raise it here.  This will cause the
-        # unittest run to fail messily, but that's better than silently
-        # ignoring an error.
-        self.__rethrow()
-        return ret
-
-    def stop(self, _arg: Any = None, **kwargs: Any) -> None:
-        """Stops the `.IOLoop`, causing one pending (or future) call to `wait()`
-        to return.
-
-        Keyword arguments or a single positional argument passed to `stop()` are
-        saved and will be returned by `wait()`.
-
-        .. deprecated:: 5.1
-
-           `stop` and `wait` are deprecated; use ``@gen_test`` instead.
-        """
-        assert _arg is None or not kwargs
-        self.__stop_args = kwargs or _arg
-        if self.__running:
-            self.io_loop.stop()
-            self.__running = False
-        self.__stopped = True
-
-    def wait(
-        self, condition: Callable[..., bool] = None, timeout: float = None
-    ) -> None:
-        """Runs the `.IOLoop` until stop is called or timeout has passed.
-
-        In the event of a timeout, an exception will be thrown. The
-        default timeout is 5 seconds; it may be overridden with a
-        ``timeout`` keyword argument or globally with the
-        ``ASYNC_TEST_TIMEOUT`` environment variable.
-
-        If ``condition`` is not ``None``, the `.IOLoop` will be restarted
-        after `stop()` until ``condition()`` returns ``True``.
-
-        .. versionchanged:: 3.1
-           Added the ``ASYNC_TEST_TIMEOUT`` environment variable.
-
-        .. deprecated:: 5.1
-
-           `stop` and `wait` are deprecated; use ``@gen_test`` instead.
-        """
-        if timeout is None:
-            timeout = get_async_test_timeout()
-
-        if not self.__stopped:
-            if timeout:
-
-                def timeout_func() -> None:
-                    try:
-                        raise self.failureException(
-                            "Async operation timed out after %s seconds" % timeout
-                        )
-                    except Exception:
-                        self.__failure = sys.exc_info()
-                    self.stop()
-
-                self.__timeout = self.io_loop.add_timeout(
-                    self.io_loop.time() + timeout, timeout_func
-                )
-            while True:
-                self.__running = True
-                self.io_loop.start()
-                if self.__failure is not None or condition is None or condition():
-                    break
-            if self.__timeout is not None:
-                self.io_loop.remove_timeout(self.__timeout)
-                self.__timeout = None
-        assert self.__stopped
-        self.__stopped = False
-        self.__rethrow()
-        result = self.__stop_args
-        self.__stop_args = None
-        return result
-
-
-class AsyncHTTPTestCase(AsyncTestCase):
-    """A test case that starts up an HTTP server.
-
-    Subclasses must override `get_app()`, which returns the
-    `tornado.web.Application` (or other `.HTTPServer` callback) to be tested.
-    Tests will typically use the provided ``self.http_client`` to fetch
-    URLs from this server.
-
-    Example, assuming the "Hello, world" example from the user guide is in
-    ``hello.py``::
-
-        import hello
-
-        class TestHelloApp(AsyncHTTPTestCase):
-            def get_app(self):
-                return hello.make_app()
-
-            def test_homepage(self):
-                response = self.fetch('/')
-                self.assertEqual(response.code, 200)
-                self.assertEqual(response.body, 'Hello, world')
-
-    That call to ``self.fetch()`` is equivalent to ::
-
-        self.http_client.fetch(self.get_url('/'), self.stop)
-        response = self.wait()
-
-    which illustrates how AsyncTestCase can turn an asynchronous operation,
-    like ``http_client.fetch()``, into a synchronous operation. If you need
-    to do other asynchronous operations in tests, you'll probably need to use
-    ``stop()`` and ``wait()`` yourself.
-    """
-
-    def setUp(self) -> None:
-        super(AsyncHTTPTestCase, self).setUp()
-        sock, port = bind_unused_port()
-        self.__port = port
-
-        self.http_client = self.get_http_client()
-        self._app = self.get_app()
-        self.http_server = self.get_http_server()
-        self.http_server.add_sockets([sock])
-
-    def get_http_client(self) -> AsyncHTTPClient:
-        return AsyncHTTPClient()
-
-    def get_http_server(self) -> HTTPServer:
-        return HTTPServer(self._app, **self.get_httpserver_options())
-
-    def get_app(self) -> Application:
-        """Should be overridden by subclasses to return a
-        `tornado.web.Application` or other `.HTTPServer` callback.
-        """
-        raise NotImplementedError()
-
-    def fetch(
-        self, path: str, raise_error: bool = False, **kwargs: Any
-    ) -> HTTPResponse:
-        """Convenience method to synchronously fetch a URL.
-
-        The given path will be appended to the local server's host and
-        port.  Any additional keyword arguments will be passed directly to
-        `.AsyncHTTPClient.fetch` (and so could be used to pass
-        ``method="POST"``, ``body="..."``, etc).
-
-        If the path begins with http:// or https://, it will be treated as a
-        full URL and will be fetched as-is.
-
-        If ``raise_error`` is ``True``, a `tornado.httpclient.HTTPError` will
-        be raised if the response code is not 200. This is the same behavior
-        as the ``raise_error`` argument to `.AsyncHTTPClient.fetch`, but
-        the default is ``False`` here (it's ``True`` in `.AsyncHTTPClient`)
-        because tests often need to deal with non-200 response codes.
-
-        .. versionchanged:: 5.0
-           Added support for absolute URLs.
-
-        .. versionchanged:: 5.1
-
-           Added the ``raise_error`` argument.
-
-        .. deprecated:: 5.1
-
-           This method currently turns any exception into an
-           `.HTTPResponse` with status code 599. In Tornado 6.0,
-           errors other than `tornado.httpclient.HTTPError` will be
-           passed through, and ``raise_error=False`` will only
-           suppress errors that would be raised due to non-200
-           response codes.
-
-        """
-        if path.lower().startswith(("http://", "https://")):
-            url = path
-        else:
-            url = self.get_url(path)
-        return self.io_loop.run_sync(
-            lambda: self.http_client.fetch(url, raise_error=raise_error, **kwargs),
-            timeout=get_async_test_timeout(),
-        )
-
-    def get_httpserver_options(self) -> Dict[str, Any]:
-        """May be overridden by subclasses to return additional
-        keyword arguments for the server.
-        """
-        return {}
-
-    def get_http_port(self) -> int:
-        """Returns the port used by the server.
-
-        A new port is chosen for each test.
-        """
-        return self.__port
-
-    def get_protocol(self) -> str:
-        return "http"
-
-    def get_url(self, path: str) -> str:
-        """Returns an absolute url for the given path on the test server."""
-        return "%s://127.0.0.1:%s%s" % (self.get_protocol(), self.get_http_port(), path)
-
-    def tearDown(self) -> None:
-        self.http_server.stop()
-        self.io_loop.run_sync(
-            self.http_server.close_all_connections, timeout=get_async_test_timeout()
-        )
-        self.http_client.close()
-        del self.http_server
-        del self._app
-        super(AsyncHTTPTestCase, self).tearDown()
-
-
-class AsyncHTTPSTestCase(AsyncHTTPTestCase):
-    """A test case that starts an HTTPS server.
-
-    Interface is generally the same as `AsyncHTTPTestCase`.
-    """
-
-    def get_http_client(self) -> AsyncHTTPClient:
-        return AsyncHTTPClient(force_instance=True, defaults=dict(validate_cert=False))
-
-    def get_httpserver_options(self) -> Dict[str, Any]:
-        return dict(ssl_options=self.get_ssl_options())
-
-    def get_ssl_options(self) -> Dict[str, Any]:
-        """May be overridden by subclasses to select SSL options.
-
-        By default includes a self-signed testing certificate.
-        """
-        return AsyncHTTPSTestCase.default_ssl_options()
-
-    @staticmethod
-    def default_ssl_options() -> Dict[str, Any]:
-        # Testing keys were generated with:
-        # openssl req -new -keyout tornado/test/test.key \
-        #                     -out tornado/test/test.crt -nodes -days 3650 -x509
-        module_dir = os.path.dirname(__file__)
-        return dict(
-            certfile=os.path.join(module_dir, "test", "test.crt"),
-            keyfile=os.path.join(module_dir, "test", "test.key"),
-        )
-
-    def get_protocol(self) -> str:
-        return "https"
-
-
-@typing.overload
-def gen_test(
-    *, timeout: float = None
-) -> Callable[[Callable[..., Union[Generator, "Coroutine"]]], Callable[..., None]]:
-    pass
-
-
-@typing.overload  # noqa: F811
-def gen_test(func: Callable[..., Union[Generator, "Coroutine"]]) -> Callable[..., None]:
-    pass
-
-
-def gen_test(  # noqa: F811
-    func: Callable[..., Union[Generator, "Coroutine"]] = None, timeout: float = None
-) -> Union[
-    Callable[..., None],
-    Callable[[Callable[..., Union[Generator, "Coroutine"]]], Callable[..., None]],
-]:
-    """Testing equivalent of ``@gen.coroutine``, to be applied to test methods.
-
-    ``@gen.coroutine`` cannot be used on tests because the `.IOLoop` is not
-    already running.  ``@gen_test`` should be applied to test methods
-    on subclasses of `AsyncTestCase`.
-
-    Example::
-
-        class MyTest(AsyncHTTPTestCase):
-            @gen_test
-            def test_something(self):
-                response = yield self.http_client.fetch(self.get_url('/'))
-
-    By default, ``@gen_test`` times out after 5 seconds. The timeout may be
-    overridden globally with the ``ASYNC_TEST_TIMEOUT`` environment variable,
-    or for each test with the ``timeout`` keyword argument::
-
-        class MyTest(AsyncHTTPTestCase):
-            @gen_test(timeout=10)
-            def test_something_slow(self):
-                response = yield self.http_client.fetch(self.get_url('/'))
-
-    Note that ``@gen_test`` is incompatible with `AsyncTestCase.stop`,
-    `AsyncTestCase.wait`, and `AsyncHTTPTestCase.fetch`. Use ``yield
-    self.http_client.fetch(self.get_url())`` as shown above instead.
-
-    .. versionadded:: 3.1
-       The ``timeout`` argument and ``ASYNC_TEST_TIMEOUT`` environment
-       variable.
-
-    .. versionchanged:: 4.0
-       The wrapper now passes along ``*args, **kwargs`` so it can be used
-       on functions with arguments.
-
-    """
-    if timeout is None:
-        timeout = get_async_test_timeout()
-
-    def wrap(f: Callable[..., Union[Generator, "Coroutine"]]) -> Callable[..., None]:
-        # Stack up several decorators to allow us to access the generator
-        # object itself.  In the innermost wrapper, we capture the generator
-        # and save it in an attribute of self.  Next, we run the wrapped
-        # function through @gen.coroutine.  Finally, the coroutine is
-        # wrapped again to make it synchronous with run_sync.
-        #
-        # This is a good case study arguing for either some sort of
-        # extensibility in the gen decorators or cancellation support.
-        @functools.wraps(f)
-        def pre_coroutine(self, *args, **kwargs):
-            # type: (AsyncTestCase, *Any, **Any) -> Union[Generator, Coroutine]
-            # Type comments used to avoid pypy3 bug.
-            result = f(self, *args, **kwargs)
-            if isinstance(result, Generator) or inspect.iscoroutine(result):
-                self._test_generator = result
-            else:
-                self._test_generator = None
-            return result
-
-        if inspect.iscoroutinefunction(f):
-            coro = pre_coroutine
-        else:
-            coro = gen.coroutine(pre_coroutine)
-
-        @functools.wraps(coro)
-        def post_coroutine(self, *args, **kwargs):
-            # type: (AsyncTestCase, *Any, **Any) -> None
-            try:
-                return self.io_loop.run_sync(
-                    functools.partial(coro, self, *args, **kwargs), timeout=timeout
-                )
-            except TimeoutError as e:
-                # run_sync raises an error with an unhelpful traceback.
-                # If the underlying generator is still running, we can throw the
-                # exception back into it so the stack trace is replaced by the
-                # point where the test is stopped. The only reason the generator
-                # would not be running would be if it were cancelled, which means
-                # a native coroutine, so we can rely on the cr_running attribute.
-                if self._test_generator is not None and getattr(
-                    self._test_generator, "cr_running", True
-                ):
-                    self._test_generator.throw(type(e), e)
-                    # In case the test contains an overly broad except
-                    # clause, we may get back here.
-                # Coroutine was stopped or didn't raise a useful stack trace,
-                # so re-raise the original exception which is better than nothing.
-                raise
-
-        return post_coroutine
-
-    if func is not None:
-        # Used like:
-        #     @gen_test
-        #     def f(self):
-        #         pass
-        return wrap(func)
-    else:
-        # Used like @gen_test(timeout=10)
-        return wrap
-
-
-# Without this attribute, nosetests will try to run gen_test as a test
-# anywhere it is imported.
-gen_test.__test__ = False  # type: ignore
-
-
-class ExpectLog(logging.Filter):
-    """Context manager to capture and suppress expected log output.
-
-    Useful to make tests of error conditions less noisy, while still
-    leaving unexpected log entries visible.  *Not thread safe.*
-
-    The attribute ``logged_stack`` is set to ``True`` if any exception
-    stack trace was logged.
-
-    Usage::
-
-        with ExpectLog('tornado.application', "Uncaught exception"):
-            error_response = self.fetch("/some_page")
-
-    .. versionchanged:: 4.3
-       Added the ``logged_stack`` attribute.
-    """
-
-    def __init__(
-        self,
-        logger: Union[logging.Logger, basestring_type],
-        regex: str,
-        required: bool = True,
-    ) -> None:
-        """Constructs an ExpectLog context manager.
-
-        :param logger: Logger object (or name of logger) to watch.  Pass
-            an empty string to watch the root logger.
-        :param regex: Regular expression to match.  Any log entries on
-            the specified logger that match this regex will be suppressed.
-        :param required: If true, an exception will be raised if the end of
-            the ``with`` statement is reached without matching any log entries.
-        """
-        if isinstance(logger, basestring_type):
-            logger = logging.getLogger(logger)
-        self.logger = logger
-        self.regex = re.compile(regex)
-        self.required = required
-        self.matched = False
-        self.logged_stack = False
-
-    def filter(self, record: logging.LogRecord) -> bool:
-        if record.exc_info:
-            self.logged_stack = True
-        message = record.getMessage()
-        if self.regex.match(message):
-            self.matched = True
-            return False
-        return True
-
-    def __enter__(self) -> "ExpectLog":
-        self.logger.addFilter(self)
-        return self
-
-    def __exit__(
-        self,
-        typ: "Optional[Type[BaseException]]",
-        value: Optional[BaseException],
-        tb: Optional[TracebackType],
-    ) -> None:
-        self.logger.removeFilter(self)
-        if not typ and self.required and not self.matched:
-            raise Exception("did not get expected log message")
-
-
-def main(**kwargs: Any) -> None:
-    """A simple test runner.
-
-    This test runner is essentially equivalent to `unittest.main` from
-    the standard library, but adds support for Tornado-style option
-    parsing and log formatting. It is *not* necessary to use this
-    `main` function to run tests using `AsyncTestCase`; these tests
-    are self-contained and can run with any test runner.
-
-    The easiest way to run a test is via the command line::
-
-        python -m tornado.testing tornado.test.web_test
-
-    See the standard library ``unittest`` module for ways in which
-    tests can be specified.
-
-    Projects with many tests may wish to define a test script like
-    ``tornado/test/runtests.py``.  This script should define a method
-    ``all()`` which returns a test suite and then call
-    `tornado.testing.main()`.  Note that even when a test script is
-    used, the ``all()`` test suite may be overridden by naming a
-    single test on the command line::
-
-        # Runs all tests
-        python -m tornado.test.runtests
-        # Runs one test
-        python -m tornado.test.runtests tornado.test.web_test
-
-    Additional keyword arguments passed through to ``unittest.main()``.
-    For example, use ``tornado.testing.main(verbosity=2)``
-    to show many test details as they are run.
-    See http://docs.python.org/library/unittest.html#unittest.main
-    for full argument list.
-
-    .. versionchanged:: 5.0
-
-       This function produces no output of its own; only that produced
-       by the `unittest` module (previously it would add a PASS or FAIL
-       log message).
-    """
-    from tornado.options import define, options, parse_command_line
-
-    define(
-        "exception_on_interrupt",
-        type=bool,
-        default=True,
-        help=(
-            "If true (default), ctrl-c raises a KeyboardInterrupt "
-            "exception.  This prints a stack trace but cannot interrupt "
-            "certain operations.  If false, the process is more reliably "
-            "killed, but does not print a stack trace."
-        ),
-    )
-
-    # support the same options as unittest's command-line interface
-    define("verbose", type=bool)
-    define("quiet", type=bool)
-    define("failfast", type=bool)
-    define("catch", type=bool)
-    define("buffer", type=bool)
-
-    argv = [sys.argv[0]] + parse_command_line(sys.argv)
-
-    if not options.exception_on_interrupt:
-        signal.signal(signal.SIGINT, signal.SIG_DFL)
-
-    if options.verbose is not None:
-        kwargs["verbosity"] = 2
-    if options.quiet is not None:
-        kwargs["verbosity"] = 0
-    if options.failfast is not None:
-        kwargs["failfast"] = True
-    if options.catch is not None:
-        kwargs["catchbreak"] = True
-    if options.buffer is not None:
-        kwargs["buffer"] = True
-
-    if __name__ == "__main__" and len(argv) == 1:
-        print("No tests specified", file=sys.stderr)
-        sys.exit(1)
-    # In order to be able to run tests by their fully-qualified name
-    # on the command line without importing all tests here,
-    # module must be set to None.  Python 3.2's unittest.main ignores
-    # defaultTest if no module is given (it tries to do its own
-    # test discovery, which is incompatible with auto2to3), so don't
-    # set module if we're not asking for a specific test.
-    if len(argv) > 1:
-        unittest.main(module=None, argv=argv, **kwargs)  # type: ignore
-    else:
-        unittest.main(defaultTest="all", argv=argv, **kwargs)
-
-
-if __name__ == "__main__":
-    main()
diff --git a/venv/lib/python3.7/site-packages/tornado/util.py b/venv/lib/python3.7/site-packages/tornado/util.py
deleted file mode 100644
index c1dc7c7..0000000
--- a/venv/lib/python3.7/site-packages/tornado/util.py
+++ /dev/null
@@ -1,472 +0,0 @@
-"""Miscellaneous utility functions and classes.
-
-This module is used internally by Tornado.  It is not necessarily expected
-that the functions and classes defined here will be useful to other
-applications, but they are documented here in case they are.
-
-The one public-facing part of this module is the `Configurable` class
-and its `~Configurable.configure` method, which becomes a part of the
-interface of its subclasses, including `.AsyncHTTPClient`, `.IOLoop`,
-and `.Resolver`.
-"""
-
-import array
-import atexit
-from inspect import getfullargspec
-import os
-import re
-import typing
-import zlib
-
-from typing import (
-    Any,
-    Optional,
-    Dict,
-    Mapping,
-    List,
-    Tuple,
-    Match,
-    Callable,
-    Type,
-    Sequence,
-)
-
-if typing.TYPE_CHECKING:
-    # Additional imports only used in type comments.
-    # This lets us make these imports lazy.
-    import datetime  # noqa: F401
-    from types import TracebackType  # noqa: F401
-    from typing import Union  # noqa: F401
-    import unittest  # noqa: F401
-
-# Aliases for types that are spelled differently in different Python
-# versions. bytes_type is deprecated and no longer used in Tornado
-# itself but is left in case anyone outside Tornado is using it.
-bytes_type = bytes
-unicode_type = str
-basestring_type = str
-
-try:
-    from sys import is_finalizing
-except ImportError:
-    # Emulate it
-    def _get_emulated_is_finalizing() -> Callable[[], bool]:
-        L = []  # type: List[None]
-        atexit.register(lambda: L.append(None))
-
-        def is_finalizing() -> bool:
-            # Not referencing any globals here
-            return L != []
-
-        return is_finalizing
-
-    is_finalizing = _get_emulated_is_finalizing()
-
-
-class TimeoutError(Exception):
-    """Exception raised by `.with_timeout` and `.IOLoop.run_sync`.
-
-    .. versionchanged:: 5.0:
-       Unified ``tornado.gen.TimeoutError`` and
-       ``tornado.ioloop.TimeoutError`` as ``tornado.util.TimeoutError``.
-       Both former names remain as aliases.
-    """
-
-
-class ObjectDict(Dict[str, Any]):
-    """Makes a dictionary behave like an object, with attribute-style access.
-    """
-
-    def __getattr__(self, name: str) -> Any:
-        try:
-            return self[name]
-        except KeyError:
-            raise AttributeError(name)
-
-    def __setattr__(self, name: str, value: Any) -> None:
-        self[name] = value
-
-
-class GzipDecompressor(object):
-    """Streaming gzip decompressor.
-
-    The interface is like that of `zlib.decompressobj` (without some of the
-    optional arguments, but it understands gzip headers and checksums.
-    """
-
-    def __init__(self) -> None:
-        # Magic parameter makes zlib module understand gzip header
-        # http://stackoverflow.com/questions/1838699/how-can-i-decompress-a-gzip-stream-with-zlib
-        # This works on cpython and pypy, but not jython.
-        self.decompressobj = zlib.decompressobj(16 + zlib.MAX_WBITS)
-
-    def decompress(self, value: bytes, max_length: int = 0) -> bytes:
-        """Decompress a chunk, returning newly-available data.
-
-        Some data may be buffered for later processing; `flush` must
-        be called when there is no more input data to ensure that
-        all data was processed.
-
-        If ``max_length`` is given, some input data may be left over
-        in ``unconsumed_tail``; you must retrieve this value and pass
-        it back to a future call to `decompress` if it is not empty.
-        """
-        return self.decompressobj.decompress(value, max_length)
-
-    @property
-    def unconsumed_tail(self) -> bytes:
-        """Returns the unconsumed portion left over
-        """
-        return self.decompressobj.unconsumed_tail
-
-    def flush(self) -> bytes:
-        """Return any remaining buffered data not yet returned by decompress.
-
-        Also checks for errors such as truncated input.
-        No other methods may be called on this object after `flush`.
-        """
-        return self.decompressobj.flush()
-
-
-def import_object(name: str) -> Any:
-    """Imports an object by name.
-
-    ``import_object('x')`` is equivalent to ``import x``.
-    ``import_object('x.y.z')`` is equivalent to ``from x.y import z``.
-
-    >>> import tornado.escape
-    >>> import_object('tornado.escape') is tornado.escape
-    True
-    >>> import_object('tornado.escape.utf8') is tornado.escape.utf8
-    True
-    >>> import_object('tornado') is tornado
-    True
-    >>> import_object('tornado.missing_module')
-    Traceback (most recent call last):
-        ...
-    ImportError: No module named missing_module
-    """
-    if name.count(".") == 0:
-        return __import__(name)
-
-    parts = name.split(".")
-    obj = __import__(".".join(parts[:-1]), fromlist=[parts[-1]])
-    try:
-        return getattr(obj, parts[-1])
-    except AttributeError:
-        raise ImportError("No module named %s" % parts[-1])
-
-
-def exec_in(code: Any, glob: Dict[str, Any], loc: Mapping[str, Any] = None) -> None:
-    if isinstance(code, str):
-        # exec(string) inherits the caller's future imports; compile
-        # the string first to prevent that.
-        code = compile(code, "<string>", "exec", dont_inherit=True)
-    exec(code, glob, loc)
-
-
-def raise_exc_info(
-    exc_info,  # type: Tuple[Optional[type], Optional[BaseException], Optional[TracebackType]]
-):
-    # type: (...) -> typing.NoReturn
-    #
-    # This function's type annotation must use comments instead of
-    # real annotations because typing.NoReturn does not exist in
-    # python 3.5's typing module. The formatting is funky because this
-    # is apparently what flake8 wants.
-    try:
-        if exc_info[1] is not None:
-            raise exc_info[1].with_traceback(exc_info[2])
-        else:
-            raise TypeError("raise_exc_info called with no exception")
-    finally:
-        # Clear the traceback reference from our stack frame to
-        # minimize circular references that slow down GC.
-        exc_info = (None, None, None)
-
-
-def errno_from_exception(e: BaseException) -> Optional[int]:
-    """Provides the errno from an Exception object.
-
-    There are cases that the errno attribute was not set so we pull
-    the errno out of the args but if someone instantiates an Exception
-    without any args you will get a tuple error. So this function
-    abstracts all that behavior to give you a safe way to get the
-    errno.
-    """
-
-    if hasattr(e, "errno"):
-        return e.errno  # type: ignore
-    elif e.args:
-        return e.args[0]
-    else:
-        return None
-
-
-_alphanum = frozenset("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
-
-
-def _re_unescape_replacement(match: Match[str]) -> str:
-    group = match.group(1)
-    if group[0] in _alphanum:
-        raise ValueError("cannot unescape '\\\\%s'" % group[0])
-    return group
-
-
-_re_unescape_pattern = re.compile(r"\\(.)", re.DOTALL)
-
-
-def re_unescape(s: str) -> str:
-    r"""Unescape a string escaped by `re.escape`.
-
-    May raise ``ValueError`` for regular expressions which could not
-    have been produced by `re.escape` (for example, strings containing
-    ``\d`` cannot be unescaped).
-
-    .. versionadded:: 4.4
-    """
-    return _re_unescape_pattern.sub(_re_unescape_replacement, s)
-
-
-class Configurable(object):
-    """Base class for configurable interfaces.
-
-    A configurable interface is an (abstract) class whose constructor
-    acts as a factory function for one of its implementation subclasses.
-    The implementation subclass as well as optional keyword arguments to
-    its initializer can be set globally at runtime with `configure`.
-
-    By using the constructor as the factory method, the interface
-    looks like a normal class, `isinstance` works as usual, etc.  This
-    pattern is most useful when the choice of implementation is likely
-    to be a global decision (e.g. when `~select.epoll` is available,
-    always use it instead of `~select.select`), or when a
-    previously-monolithic class has been split into specialized
-    subclasses.
-
-    Configurable subclasses must define the class methods
-    `configurable_base` and `configurable_default`, and use the instance
-    method `initialize` instead of ``__init__``.
-
-    .. versionchanged:: 5.0
-
-       It is now possible for configuration to be specified at
-       multiple levels of a class hierarchy.
-
-    """
-
-    # Type annotations on this class are mostly done with comments
-    # because they need to refer to Configurable, which isn't defined
-    # until after the class definition block. These can use regular
-    # annotations when our minimum python version is 3.7.
-    #
-    # There may be a clever way to use generics here to get more
-    # precise types (i.e. for a particular Configurable subclass T,
-    # all the types are subclasses of T, not just Configurable).
-    __impl_class = None  # type: Optional[Type[Configurable]]
-    __impl_kwargs = None  # type: Dict[str, Any]
-
-    def __new__(cls, *args: Any, **kwargs: Any) -> Any:
-        base = cls.configurable_base()
-        init_kwargs = {}  # type: Dict[str, Any]
-        if cls is base:
-            impl = cls.configured_class()
-            if base.__impl_kwargs:
-                init_kwargs.update(base.__impl_kwargs)
-        else:
-            impl = cls
-        init_kwargs.update(kwargs)
-        if impl.configurable_base() is not base:
-            # The impl class is itself configurable, so recurse.
-            return impl(*args, **init_kwargs)
-        instance = super(Configurable, cls).__new__(impl)
-        # initialize vs __init__ chosen for compatibility with AsyncHTTPClient
-        # singleton magic.  If we get rid of that we can switch to __init__
-        # here too.
-        instance.initialize(*args, **init_kwargs)
-        return instance
-
-    @classmethod
-    def configurable_base(cls):
-        # type: () -> Type[Configurable]
-        """Returns the base class of a configurable hierarchy.
-
-        This will normally return the class in which it is defined.
-        (which is *not* necessarily the same as the ``cls`` classmethod
-        parameter).
-
-        """
-        raise NotImplementedError()
-
-    @classmethod
-    def configurable_default(cls):
-        # type: () -> Type[Configurable]
-        """Returns the implementation class to be used if none is configured."""
-        raise NotImplementedError()
-
-    def _initialize(self) -> None:
-        pass
-
-    initialize = _initialize  # type: Callable[..., None]
-    """Initialize a `Configurable` subclass instance.
-
-    Configurable classes should use `initialize` instead of ``__init__``.
-
-    .. versionchanged:: 4.2
-       Now accepts positional arguments in addition to keyword arguments.
-    """
-
-    @classmethod
-    def configure(cls, impl, **kwargs):
-        # type: (Union[None, str, Type[Configurable]], Any) -> None
-        """Sets the class to use when the base class is instantiated.
-
-        Keyword arguments will be saved and added to the arguments passed
-        to the constructor.  This can be used to set global defaults for
-        some parameters.
-        """
-        base = cls.configurable_base()
-        if isinstance(impl, str):
-            impl = typing.cast(Type[Configurable], import_object(impl))
-        if impl is not None and not issubclass(impl, cls):
-            raise ValueError("Invalid subclass of %s" % cls)
-        base.__impl_class = impl
-        base.__impl_kwargs = kwargs
-
-    @classmethod
-    def configured_class(cls):
-        # type: () -> Type[Configurable]
-        """Returns the currently configured class."""
-        base = cls.configurable_base()
-        # Manually mangle the private name to see whether this base
-        # has been configured (and not another base higher in the
-        # hierarchy).
-        if base.__dict__.get("_Configurable__impl_class") is None:
-            base.__impl_class = cls.configurable_default()
-        if base.__impl_class is not None:
-            return base.__impl_class
-        else:
-            # Should be impossible, but mypy wants an explicit check.
-            raise ValueError("configured class not found")
-
-    @classmethod
-    def _save_configuration(cls):
-        # type: () -> Tuple[Optional[Type[Configurable]], Dict[str, Any]]
-        base = cls.configurable_base()
-        return (base.__impl_class, base.__impl_kwargs)
-
-    @classmethod
-    def _restore_configuration(cls, saved):
-        # type: (Tuple[Optional[Type[Configurable]], Dict[str, Any]]) -> None
-        base = cls.configurable_base()
-        base.__impl_class = saved[0]
-        base.__impl_kwargs = saved[1]
-
-
-class ArgReplacer(object):
-    """Replaces one value in an ``args, kwargs`` pair.
-
-    Inspects the function signature to find an argument by name
-    whether it is passed by position or keyword.  For use in decorators
-    and similar wrappers.
-    """
-
-    def __init__(self, func: Callable, name: str) -> None:
-        self.name = name
-        try:
-            self.arg_pos = self._getargnames(func).index(name)  # type: Optional[int]
-        except ValueError:
-            # Not a positional parameter
-            self.arg_pos = None
-
-    def _getargnames(self, func: Callable) -> List[str]:
-        try:
-            return getfullargspec(func).args
-        except TypeError:
-            if hasattr(func, "func_code"):
-                # Cython-generated code has all the attributes needed
-                # by inspect.getfullargspec, but the inspect module only
-                # works with ordinary functions. Inline the portion of
-                # getfullargspec that we need here. Note that for static
-                # functions the @cython.binding(True) decorator must
-                # be used (for methods it works out of the box).
-                code = func.func_code  # type: ignore
-                return code.co_varnames[: code.co_argcount]
-            raise
-
-    def get_old_value(
-        self, args: Sequence[Any], kwargs: Dict[str, Any], default: Any = None
-    ) -> Any:
-        """Returns the old value of the named argument without replacing it.
-
-        Returns ``default`` if the argument is not present.
-        """
-        if self.arg_pos is not None and len(args) > self.arg_pos:
-            return args[self.arg_pos]
-        else:
-            return kwargs.get(self.name, default)
-
-    def replace(
-        self, new_value: Any, args: Sequence[Any], kwargs: Dict[str, Any]
-    ) -> Tuple[Any, Sequence[Any], Dict[str, Any]]:
-        """Replace the named argument in ``args, kwargs`` with ``new_value``.
-
-        Returns ``(old_value, args, kwargs)``.  The returned ``args`` and
-        ``kwargs`` objects may not be the same as the input objects, or
-        the input objects may be mutated.
-
-        If the named argument was not found, ``new_value`` will be added
-        to ``kwargs`` and None will be returned as ``old_value``.
-        """
-        if self.arg_pos is not None and len(args) > self.arg_pos:
-            # The arg to replace is passed positionally
-            old_value = args[self.arg_pos]
-            args = list(args)  # *args is normally a tuple
-            args[self.arg_pos] = new_value
-        else:
-            # The arg to replace is either omitted or passed by keyword.
-            old_value = kwargs.get(self.name)
-            kwargs[self.name] = new_value
-        return old_value, args, kwargs
-
-
-def timedelta_to_seconds(td):
-    # type: (datetime.timedelta) -> float
-    """Equivalent to ``td.total_seconds()`` (introduced in Python 2.7)."""
-    return td.total_seconds()
-
-
-def _websocket_mask_python(mask: bytes, data: bytes) -> bytes:
-    """Websocket masking function.
-
-    `mask` is a `bytes` object of length 4; `data` is a `bytes` object of any length.
-    Returns a `bytes` object of the same length as `data` with the mask applied
-    as specified in section 5.3 of RFC 6455.
-
-    This pure-python implementation may be replaced by an optimized version when available.
-    """
-    mask_arr = array.array("B", mask)
-    unmasked_arr = array.array("B", data)
-    for i in range(len(data)):
-        unmasked_arr[i] = unmasked_arr[i] ^ mask_arr[i % 4]
-    return unmasked_arr.tobytes()
-
-
-if os.environ.get("TORNADO_NO_EXTENSION") or os.environ.get("TORNADO_EXTENSION") == "0":
-    # These environment variables exist to make it easier to do performance
-    # comparisons; they are not guaranteed to remain supported in the future.
-    _websocket_mask = _websocket_mask_python
-else:
-    try:
-        from tornado.speedups import websocket_mask as _websocket_mask
-    except ImportError:
-        if os.environ.get("TORNADO_EXTENSION") == "1":
-            raise
-        _websocket_mask = _websocket_mask_python
-
-
-def doctests():
-    # type: () -> unittest.TestSuite
-    import doctest
-
-    return doctest.DocTestSuite()
diff --git a/venv/lib/python3.7/site-packages/tornado/web.py b/venv/lib/python3.7/site-packages/tornado/web.py
deleted file mode 100644
index 6e6e955..0000000
--- a/venv/lib/python3.7/site-packages/tornado/web.py
+++ /dev/null
@@ -1,3585 +0,0 @@
-#
-# Copyright 2009 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-"""``tornado.web`` provides a simple web framework with asynchronous
-features that allow it to scale to large numbers of open connections,
-making it ideal for `long polling
-<http://en.wikipedia.org/wiki/Push_technology#Long_polling>`_.
-
-Here is a simple "Hello, world" example app:
-
-.. testcode::
-
-    import tornado.ioloop
-    import tornado.web
-
-    class MainHandler(tornado.web.RequestHandler):
-        def get(self):
-            self.write("Hello, world")
-
-    if __name__ == "__main__":
-        application = tornado.web.Application([
-            (r"/", MainHandler),
-        ])
-        application.listen(8888)
-        tornado.ioloop.IOLoop.current().start()
-
-.. testoutput::
-   :hide:
-
-
-See the :doc:`guide` for additional information.
-
-Thread-safety notes
--------------------
-
-In general, methods on `RequestHandler` and elsewhere in Tornado are
-not thread-safe. In particular, methods such as
-`~RequestHandler.write()`, `~RequestHandler.finish()`, and
-`~RequestHandler.flush()` must only be called from the main thread. If
-you use multiple threads it is important to use `.IOLoop.add_callback`
-to transfer control back to the main thread before finishing the
-request, or to limit your use of other threads to
-`.IOLoop.run_in_executor` and ensure that your callbacks running in
-the executor do not refer to Tornado objects.
-
-"""
-
-import base64
-import binascii
-import datetime
-import email.utils
-import functools
-import gzip
-import hashlib
-import hmac
-import http.cookies
-from inspect import isclass
-from io import BytesIO
-import mimetypes
-import numbers
-import os.path
-import re
-import sys
-import threading
-import time
-import tornado
-import traceback
-import types
-import urllib.parse
-from urllib.parse import urlencode
-
-from tornado.concurrent import Future, future_set_result_unless_cancelled
-from tornado import escape
-from tornado import gen
-from tornado.httpserver import HTTPServer
-from tornado import httputil
-from tornado import iostream
-import tornado.locale
-from tornado import locale
-from tornado.log import access_log, app_log, gen_log
-from tornado import template
-from tornado.escape import utf8, _unicode
-from tornado.routing import (
-    AnyMatches,
-    DefaultHostMatches,
-    HostMatches,
-    ReversibleRouter,
-    Rule,
-    ReversibleRuleRouter,
-    URLSpec,
-    _RuleList,
-)
-from tornado.util import ObjectDict, unicode_type, _websocket_mask
-
-url = URLSpec
-
-from typing import (
-    Dict,
-    Any,
-    Union,
-    Optional,
-    Awaitable,
-    Tuple,
-    List,
-    Callable,
-    Iterable,
-    Generator,
-    Type,
-    cast,
-    overload,
-)
-from types import TracebackType
-import typing
-
-if typing.TYPE_CHECKING:
-    from typing import Set  # noqa: F401
-
-
-# The following types are accepted by RequestHandler.set_header
-# and related methods.
-_HeaderTypes = Union[bytes, unicode_type, int, numbers.Integral, datetime.datetime]
-
-_CookieSecretTypes = Union[str, bytes, Dict[int, str], Dict[int, bytes]]
-
-
-MIN_SUPPORTED_SIGNED_VALUE_VERSION = 1
-"""The oldest signed value version supported by this version of Tornado.
-
-Signed values older than this version cannot be decoded.
-
-.. versionadded:: 3.2.1
-"""
-
-MAX_SUPPORTED_SIGNED_VALUE_VERSION = 2
-"""The newest signed value version supported by this version of Tornado.
-
-Signed values newer than this version cannot be decoded.
-
-.. versionadded:: 3.2.1
-"""
-
-DEFAULT_SIGNED_VALUE_VERSION = 2
-"""The signed value version produced by `.RequestHandler.create_signed_value`.
-
-May be overridden by passing a ``version`` keyword argument.
-
-.. versionadded:: 3.2.1
-"""
-
-DEFAULT_SIGNED_VALUE_MIN_VERSION = 1
-"""The oldest signed value accepted by `.RequestHandler.get_secure_cookie`.
-
-May be overridden by passing a ``min_version`` keyword argument.
-
-.. versionadded:: 3.2.1
-"""
-
-
-class _ArgDefaultMarker:
-    pass
-
-
-_ARG_DEFAULT = _ArgDefaultMarker()
-
-
-class RequestHandler(object):
-    """Base class for HTTP request handlers.
-
-    Subclasses must define at least one of the methods defined in the
-    "Entry points" section below.
-
-    Applications should not construct `RequestHandler` objects
-    directly and subclasses should not override ``__init__`` (override
-    `~RequestHandler.initialize` instead).
-
-    """
-
-    SUPPORTED_METHODS = ("GET", "HEAD", "POST", "DELETE", "PATCH", "PUT", "OPTIONS")
-
-    _template_loaders = {}  # type: Dict[str, template.BaseLoader]
-    _template_loader_lock = threading.Lock()
-    _remove_control_chars_regex = re.compile(r"[\x00-\x08\x0e-\x1f]")
-
-    _stream_request_body = False
-
-    # Will be set in _execute.
-    _transforms = None  # type: List[OutputTransform]
-    path_args = None  # type: List[str]
-    path_kwargs = None  # type: Dict[str, str]
-
-    def __init__(
-        self,
-        application: "Application",
-        request: httputil.HTTPServerRequest,
-        **kwargs: Any
-    ) -> None:
-        super(RequestHandler, self).__init__()
-
-        self.application = application
-        self.request = request
-        self._headers_written = False
-        self._finished = False
-        self._auto_finish = True
-        self._prepared_future = None
-        self.ui = ObjectDict(
-            (n, self._ui_method(m)) for n, m in application.ui_methods.items()
-        )
-        # UIModules are available as both `modules` and `_tt_modules` in the
-        # template namespace.  Historically only `modules` was available
-        # but could be clobbered by user additions to the namespace.
-        # The template {% module %} directive looks in `_tt_modules` to avoid
-        # possible conflicts.
-        self.ui["_tt_modules"] = _UIModuleNamespace(self, application.ui_modules)
-        self.ui["modules"] = self.ui["_tt_modules"]
-        self.clear()
-        assert self.request.connection is not None
-        # TODO: need to add set_close_callback to HTTPConnection interface
-        self.request.connection.set_close_callback(  # type: ignore
-            self.on_connection_close
-        )
-        self.initialize(**kwargs)  # type: ignore
-
-    def _initialize(self) -> None:
-        pass
-
-    initialize = _initialize  # type: Callable[..., None]
-    """Hook for subclass initialization. Called for each request.
-
-    A dictionary passed as the third argument of a ``URLSpec`` will be
-    supplied as keyword arguments to ``initialize()``.
-
-    Example::
-
-        class ProfileHandler(RequestHandler):
-            def initialize(self, database):
-                self.database = database
-
-            def get(self, username):
-                ...
-
-        app = Application([
-            (r'/user/(.*)', ProfileHandler, dict(database=database)),
-            ])
-    """
-
-    @property
-    def settings(self) -> Dict[str, Any]:
-        """An alias for `self.application.settings <Application.settings>`."""
-        return self.application.settings
-
-    def _unimplemented_method(self, *args: str, **kwargs: str) -> None:
-        raise HTTPError(405)
-
-    head = _unimplemented_method  # type: Callable[..., Optional[Awaitable[None]]]
-    get = _unimplemented_method  # type: Callable[..., Optional[Awaitable[None]]]
-    post = _unimplemented_method  # type: Callable[..., Optional[Awaitable[None]]]
-    delete = _unimplemented_method  # type: Callable[..., Optional[Awaitable[None]]]
-    patch = _unimplemented_method  # type: Callable[..., Optional[Awaitable[None]]]
-    put = _unimplemented_method  # type: Callable[..., Optional[Awaitable[None]]]
-    options = _unimplemented_method  # type: Callable[..., Optional[Awaitable[None]]]
-
-    def prepare(self) -> Optional[Awaitable[None]]:
-        """Called at the beginning of a request before  `get`/`post`/etc.
-
-        Override this method to perform common initialization regardless
-        of the request method.
-
-        Asynchronous support: Use ``async def`` or decorate this method with
-        `.gen.coroutine` to make it asynchronous.
-        If this method returns an  ``Awaitable`` execution will not proceed
-        until the ``Awaitable`` is done.
-
-        .. versionadded:: 3.1
-           Asynchronous support.
-        """
-        pass
-
-    def on_finish(self) -> None:
-        """Called after the end of a request.
-
-        Override this method to perform cleanup, logging, etc.
-        This method is a counterpart to `prepare`.  ``on_finish`` may
-        not produce any output, as it is called after the response
-        has been sent to the client.
-        """
-        pass
-
-    def on_connection_close(self) -> None:
-        """Called in async handlers if the client closed the connection.
-
-        Override this to clean up resources associated with
-        long-lived connections.  Note that this method is called only if
-        the connection was closed during asynchronous processing; if you
-        need to do cleanup after every request override `on_finish`
-        instead.
-
-        Proxies may keep a connection open for a time (perhaps
-        indefinitely) after the client has gone away, so this method
-        may not be called promptly after the end user closes their
-        connection.
-        """
-        if _has_stream_request_body(self.__class__):
-            if not self.request._body_future.done():
-                self.request._body_future.set_exception(iostream.StreamClosedError())
-                self.request._body_future.exception()
-
-    def clear(self) -> None:
-        """Resets all headers and content for this response."""
-        self._headers = httputil.HTTPHeaders(
-            {
-                "Server": "TornadoServer/%s" % tornado.version,
-                "Content-Type": "text/html; charset=UTF-8",
-                "Date": httputil.format_timestamp(time.time()),
-            }
-        )
-        self.set_default_headers()
-        self._write_buffer = []  # type: List[bytes]
-        self._status_code = 200
-        self._reason = httputil.responses[200]
-
-    def set_default_headers(self) -> None:
-        """Override this to set HTTP headers at the beginning of the request.
-
-        For example, this is the place to set a custom ``Server`` header.
-        Note that setting such headers in the normal flow of request
-        processing may not do what you want, since headers may be reset
-        during error handling.
-        """
-        pass
-
-    def set_status(self, status_code: int, reason: str = None) -> None:
-        """Sets the status code for our response.
-
-        :arg int status_code: Response status code.
-        :arg str reason: Human-readable reason phrase describing the status
-            code. If ``None``, it will be filled in from
-            `http.client.responses` or "Unknown".
-
-        .. versionchanged:: 5.0
-
-           No longer validates that the response code is in
-           `http.client.responses`.
-        """
-        self._status_code = status_code
-        if reason is not None:
-            self._reason = escape.native_str(reason)
-        else:
-            self._reason = httputil.responses.get(status_code, "Unknown")
-
-    def get_status(self) -> int:
-        """Returns the status code for our response."""
-        return self._status_code
-
-    def set_header(self, name: str, value: _HeaderTypes) -> None:
-        """Sets the given response header name and value.
-
-        All header values are converted to strings (`datetime` objects
-        are formatted according to the HTTP specification for the
-        ``Date`` header).
-
-        """
-        self._headers[name] = self._convert_header_value(value)
-
-    def add_header(self, name: str, value: _HeaderTypes) -> None:
-        """Adds the given response header and value.
-
-        Unlike `set_header`, `add_header` may be called multiple times
-        to return multiple values for the same header.
-        """
-        self._headers.add(name, self._convert_header_value(value))
-
-    def clear_header(self, name: str) -> None:
-        """Clears an outgoing header, undoing a previous `set_header` call.
-
-        Note that this method does not apply to multi-valued headers
-        set by `add_header`.
-        """
-        if name in self._headers:
-            del self._headers[name]
-
-    _INVALID_HEADER_CHAR_RE = re.compile(r"[\x00-\x1f]")
-
-    def _convert_header_value(self, value: _HeaderTypes) -> str:
-        # Convert the input value to a str. This type check is a bit
-        # subtle: The bytes case only executes on python 3, and the
-        # unicode case only executes on python 2, because the other
-        # cases are covered by the first match for str.
-        if isinstance(value, str):
-            retval = value
-        elif isinstance(value, bytes):  # py3
-            # Non-ascii characters in headers are not well supported,
-            # but if you pass bytes, use latin1 so they pass through as-is.
-            retval = value.decode("latin1")
-        elif isinstance(value, unicode_type):  # py2
-            # TODO: This is inconsistent with the use of latin1 above,
-            # but it's been that way for a long time. Should it change?
-            retval = escape.utf8(value)
-        elif isinstance(value, numbers.Integral):
-            # return immediately since we know the converted value will be safe
-            return str(value)
-        elif isinstance(value, datetime.datetime):
-            return httputil.format_timestamp(value)
-        else:
-            raise TypeError("Unsupported header value %r" % value)
-        # If \n is allowed into the header, it is possible to inject
-        # additional headers or split the request.
-        if RequestHandler._INVALID_HEADER_CHAR_RE.search(retval):
-            raise ValueError("Unsafe header value %r", retval)
-        return retval
-
-    @overload
-    def get_argument(self, name: str, default: str, strip: bool = True) -> str:
-        pass
-
-    @overload  # noqa: F811
-    def get_argument(
-        self, name: str, default: _ArgDefaultMarker = _ARG_DEFAULT, strip: bool = True
-    ) -> str:
-        pass
-
-    @overload  # noqa: F811
-    def get_argument(
-        self, name: str, default: None, strip: bool = True
-    ) -> Optional[str]:
-        pass
-
-    def get_argument(  # noqa: F811
-        self,
-        name: str,
-        default: Union[None, str, _ArgDefaultMarker] = _ARG_DEFAULT,
-        strip: bool = True,
-    ) -> Optional[str]:
-        """Returns the value of the argument with the given name.
-
-        If default is not provided, the argument is considered to be
-        required, and we raise a `MissingArgumentError` if it is missing.
-
-        If the argument appears in the request more than once, we return the
-        last value.
-
-        This method searches both the query and body arguments.
-        """
-        return self._get_argument(name, default, self.request.arguments, strip)
-
-    def get_arguments(self, name: str, strip: bool = True) -> List[str]:
-        """Returns a list of the arguments with the given name.
-
-        If the argument is not present, returns an empty list.
-
-        This method searches both the query and body arguments.
-        """
-
-        # Make sure `get_arguments` isn't accidentally being called with a
-        # positional argument that's assumed to be a default (like in
-        # `get_argument`.)
-        assert isinstance(strip, bool)
-
-        return self._get_arguments(name, self.request.arguments, strip)
-
-    def get_body_argument(
-        self,
-        name: str,
-        default: Union[None, str, _ArgDefaultMarker] = _ARG_DEFAULT,
-        strip: bool = True,
-    ) -> Optional[str]:
-        """Returns the value of the argument with the given name
-        from the request body.
-
-        If default is not provided, the argument is considered to be
-        required, and we raise a `MissingArgumentError` if it is missing.
-
-        If the argument appears in the url more than once, we return the
-        last value.
-
-        .. versionadded:: 3.2
-        """
-        return self._get_argument(name, default, self.request.body_arguments, strip)
-
-    def get_body_arguments(self, name: str, strip: bool = True) -> List[str]:
-        """Returns a list of the body arguments with the given name.
-
-        If the argument is not present, returns an empty list.
-
-        .. versionadded:: 3.2
-        """
-        return self._get_arguments(name, self.request.body_arguments, strip)
-
-    def get_query_argument(
-        self,
-        name: str,
-        default: Union[None, str, _ArgDefaultMarker] = _ARG_DEFAULT,
-        strip: bool = True,
-    ) -> Optional[str]:
-        """Returns the value of the argument with the given name
-        from the request query string.
-
-        If default is not provided, the argument is considered to be
-        required, and we raise a `MissingArgumentError` if it is missing.
-
-        If the argument appears in the url more than once, we return the
-        last value.
-
-        .. versionadded:: 3.2
-        """
-        return self._get_argument(name, default, self.request.query_arguments, strip)
-
-    def get_query_arguments(self, name: str, strip: bool = True) -> List[str]:
-        """Returns a list of the query arguments with the given name.
-
-        If the argument is not present, returns an empty list.
-
-        .. versionadded:: 3.2
-        """
-        return self._get_arguments(name, self.request.query_arguments, strip)
-
-    def _get_argument(
-        self,
-        name: str,
-        default: Union[None, str, _ArgDefaultMarker],
-        source: Dict[str, List[bytes]],
-        strip: bool = True,
-    ) -> Optional[str]:
-        args = self._get_arguments(name, source, strip=strip)
-        if not args:
-            if isinstance(default, _ArgDefaultMarker):
-                raise MissingArgumentError(name)
-            return default
-        return args[-1]
-
-    def _get_arguments(
-        self, name: str, source: Dict[str, List[bytes]], strip: bool = True
-    ) -> List[str]:
-        values = []
-        for v in source.get(name, []):
-            s = self.decode_argument(v, name=name)
-            if isinstance(s, unicode_type):
-                # Get rid of any weird control chars (unless decoding gave
-                # us bytes, in which case leave it alone)
-                s = RequestHandler._remove_control_chars_regex.sub(" ", s)
-            if strip:
-                s = s.strip()
-            values.append(s)
-        return values
-
-    def decode_argument(self, value: bytes, name: str = None) -> str:
-        """Decodes an argument from the request.
-
-        The argument has been percent-decoded and is now a byte string.
-        By default, this method decodes the argument as utf-8 and returns
-        a unicode string, but this may be overridden in subclasses.
-
-        This method is used as a filter for both `get_argument()` and for
-        values extracted from the url and passed to `get()`/`post()`/etc.
-
-        The name of the argument is provided if known, but may be None
-        (e.g. for unnamed groups in the url regex).
-        """
-        try:
-            return _unicode(value)
-        except UnicodeDecodeError:
-            raise HTTPError(
-                400, "Invalid unicode in %s: %r" % (name or "url", value[:40])
-            )
-
-    @property
-    def cookies(self) -> Dict[str, http.cookies.Morsel]:
-        """An alias for
-        `self.request.cookies <.httputil.HTTPServerRequest.cookies>`."""
-        return self.request.cookies
-
-    def get_cookie(self, name: str, default: str = None) -> Optional[str]:
-        """Returns the value of the request cookie with the given name.
-
-        If the named cookie is not present, returns ``default``.
-
-        This method only returns cookies that were present in the request.
-        It does not see the outgoing cookies set by `set_cookie` in this
-        handler.
-        """
-        if self.request.cookies is not None and name in self.request.cookies:
-            return self.request.cookies[name].value
-        return default
-
-    def set_cookie(
-        self,
-        name: str,
-        value: Union[str, bytes],
-        domain: str = None,
-        expires: Union[float, Tuple, datetime.datetime] = None,
-        path: str = "/",
-        expires_days: int = None,
-        **kwargs: Any
-    ) -> None:
-        """Sets an outgoing cookie name/value with the given options.
-
-        Newly-set cookies are not immediately visible via `get_cookie`;
-        they are not present until the next request.
-
-        expires may be a numeric timestamp as returned by `time.time`,
-        a time tuple as returned by `time.gmtime`, or a
-        `datetime.datetime` object.
-
-        Additional keyword arguments are set on the cookies.Morsel
-        directly.
-        See https://docs.python.org/3/library/http.cookies.html#http.cookies.Morsel
-        for available attributes.
-        """
-        # The cookie library only accepts type str, in both python 2 and 3
-        name = escape.native_str(name)
-        value = escape.native_str(value)
-        if re.search(r"[\x00-\x20]", name + value):
-            # Don't let us accidentally inject bad stuff
-            raise ValueError("Invalid cookie %r: %r" % (name, value))
-        if not hasattr(self, "_new_cookie"):
-            self._new_cookie = http.cookies.SimpleCookie()
-        if name in self._new_cookie:
-            del self._new_cookie[name]
-        self._new_cookie[name] = value
-        morsel = self._new_cookie[name]
-        if domain:
-            morsel["domain"] = domain
-        if expires_days is not None and not expires:
-            expires = datetime.datetime.utcnow() + datetime.timedelta(days=expires_days)
-        if expires:
-            morsel["expires"] = httputil.format_timestamp(expires)
-        if path:
-            morsel["path"] = path
-        for k, v in kwargs.items():
-            if k == "max_age":
-                k = "max-age"
-
-            # skip falsy values for httponly and secure flags because
-            # SimpleCookie sets them regardless
-            if k in ["httponly", "secure"] and not v:
-                continue
-
-            morsel[k] = v
-
-    def clear_cookie(self, name: str, path: str = "/", domain: str = None) -> None:
-        """Deletes the cookie with the given name.
-
-        Due to limitations of the cookie protocol, you must pass the same
-        path and domain to clear a cookie as were used when that cookie
-        was set (but there is no way to find out on the server side
-        which values were used for a given cookie).
-
-        Similar to `set_cookie`, the effect of this method will not be
-        seen until the following request.
-        """
-        expires = datetime.datetime.utcnow() - datetime.timedelta(days=365)
-        self.set_cookie(name, value="", path=path, expires=expires, domain=domain)
-
-    def clear_all_cookies(self, path: str = "/", domain: str = None) -> None:
-        """Deletes all the cookies the user sent with this request.
-
-        See `clear_cookie` for more information on the path and domain
-        parameters.
-
-        Similar to `set_cookie`, the effect of this method will not be
-        seen until the following request.
-
-        .. versionchanged:: 3.2
-
-           Added the ``path`` and ``domain`` parameters.
-        """
-        for name in self.request.cookies:
-            self.clear_cookie(name, path=path, domain=domain)
-
-    def set_secure_cookie(
-        self,
-        name: str,
-        value: Union[str, bytes],
-        expires_days: int = 30,
-        version: int = None,
-        **kwargs: Any
-    ) -> None:
-        """Signs and timestamps a cookie so it cannot be forged.
-
-        You must specify the ``cookie_secret`` setting in your Application
-        to use this method. It should be a long, random sequence of bytes
-        to be used as the HMAC secret for the signature.
-
-        To read a cookie set with this method, use `get_secure_cookie()`.
-
-        Note that the ``expires_days`` parameter sets the lifetime of the
-        cookie in the browser, but is independent of the ``max_age_days``
-        parameter to `get_secure_cookie`.
-
-        Secure cookies may contain arbitrary byte values, not just unicode
-        strings (unlike regular cookies)
-
-        Similar to `set_cookie`, the effect of this method will not be
-        seen until the following request.
-
-        .. versionchanged:: 3.2.1
-
-           Added the ``version`` argument.  Introduced cookie version 2
-           and made it the default.
-        """
-        self.set_cookie(
-            name,
-            self.create_signed_value(name, value, version=version),
-            expires_days=expires_days,
-            **kwargs
-        )
-
-    def create_signed_value(
-        self, name: str, value: Union[str, bytes], version: int = None
-    ) -> bytes:
-        """Signs and timestamps a string so it cannot be forged.
-
-        Normally used via set_secure_cookie, but provided as a separate
-        method for non-cookie uses.  To decode a value not stored
-        as a cookie use the optional value argument to get_secure_cookie.
-
-        .. versionchanged:: 3.2.1
-
-           Added the ``version`` argument.  Introduced cookie version 2
-           and made it the default.
-        """
-        self.require_setting("cookie_secret", "secure cookies")
-        secret = self.application.settings["cookie_secret"]
-        key_version = None
-        if isinstance(secret, dict):
-            if self.application.settings.get("key_version") is None:
-                raise Exception("key_version setting must be used for secret_key dicts")
-            key_version = self.application.settings["key_version"]
-
-        return create_signed_value(
-            secret, name, value, version=version, key_version=key_version
-        )
-
-    def get_secure_cookie(
-        self,
-        name: str,
-        value: str = None,
-        max_age_days: int = 31,
-        min_version: int = None,
-    ) -> Optional[bytes]:
-        """Returns the given signed cookie if it validates, or None.
-
-        The decoded cookie value is returned as a byte string (unlike
-        `get_cookie`).
-
-        Similar to `get_cookie`, this method only returns cookies that
-        were present in the request. It does not see outgoing cookies set by
-        `set_secure_cookie` in this handler.
-
-        .. versionchanged:: 3.2.1
-
-           Added the ``min_version`` argument.  Introduced cookie version 2;
-           both versions 1 and 2 are accepted by default.
-        """
-        self.require_setting("cookie_secret", "secure cookies")
-        if value is None:
-            value = self.get_cookie(name)
-        return decode_signed_value(
-            self.application.settings["cookie_secret"],
-            name,
-            value,
-            max_age_days=max_age_days,
-            min_version=min_version,
-        )
-
-    def get_secure_cookie_key_version(
-        self, name: str, value: str = None
-    ) -> Optional[int]:
-        """Returns the signing key version of the secure cookie.
-
-        The version is returned as int.
-        """
-        self.require_setting("cookie_secret", "secure cookies")
-        if value is None:
-            value = self.get_cookie(name)
-        if value is None:
-            return None
-        return get_signature_key_version(value)
-
-    def redirect(self, url: str, permanent: bool = False, status: int = None) -> None:
-        """Sends a redirect to the given (optionally relative) URL.
-
-        If the ``status`` argument is specified, that value is used as the
-        HTTP status code; otherwise either 301 (permanent) or 302
-        (temporary) is chosen based on the ``permanent`` argument.
-        The default is 302 (temporary).
-        """
-        if self._headers_written:
-            raise Exception("Cannot redirect after headers have been written")
-        if status is None:
-            status = 301 if permanent else 302
-        else:
-            assert isinstance(status, int) and 300 <= status <= 399
-        self.set_status(status)
-        self.set_header("Location", utf8(url))
-        self.finish()
-
-    def write(self, chunk: Union[str, bytes, dict]) -> None:
-        """Writes the given chunk to the output buffer.
-
-        To write the output to the network, use the `flush()` method below.
-
-        If the given chunk is a dictionary, we write it as JSON and set
-        the Content-Type of the response to be ``application/json``.
-        (if you want to send JSON as a different ``Content-Type``, call
-        ``set_header`` *after* calling ``write()``).
-
-        Note that lists are not converted to JSON because of a potential
-        cross-site security vulnerability.  All JSON output should be
-        wrapped in a dictionary.  More details at
-        http://haacked.com/archive/2009/06/25/json-hijacking.aspx/ and
-        https://github.com/facebook/tornado/issues/1009
-        """
-        if self._finished:
-            raise RuntimeError("Cannot write() after finish()")
-        if not isinstance(chunk, (bytes, unicode_type, dict)):
-            message = "write() only accepts bytes, unicode, and dict objects"
-            if isinstance(chunk, list):
-                message += (
-                    ". Lists not accepted for security reasons; see "
-                    + "http://www.tornadoweb.org/en/stable/web.html#tornado.web.RequestHandler.write"  # noqa: E501
-                )
-            raise TypeError(message)
-        if isinstance(chunk, dict):
-            chunk = escape.json_encode(chunk)
-            self.set_header("Content-Type", "application/json; charset=UTF-8")
-        chunk = utf8(chunk)
-        self._write_buffer.append(chunk)
-
-    def render(self, template_name: str, **kwargs: Any) -> "Future[None]":
-        """Renders the template with the given arguments as the response.
-
-        ``render()`` calls ``finish()``, so no other output methods can be called
-        after it.
-
-        Returns a `.Future` with the same semantics as the one returned by `finish`.
-        Awaiting this `.Future` is optional.
-
-        .. versionchanged:: 5.1
-
-           Now returns a `.Future` instead of ``None``.
-        """
-        if self._finished:
-            raise RuntimeError("Cannot render() after finish()")
-        html = self.render_string(template_name, **kwargs)
-
-        # Insert the additional JS and CSS added by the modules on the page
-        js_embed = []
-        js_files = []
-        css_embed = []
-        css_files = []
-        html_heads = []
-        html_bodies = []
-        for module in getattr(self, "_active_modules", {}).values():
-            embed_part = module.embedded_javascript()
-            if embed_part:
-                js_embed.append(utf8(embed_part))
-            file_part = module.javascript_files()
-            if file_part:
-                if isinstance(file_part, (unicode_type, bytes)):
-                    js_files.append(_unicode(file_part))
-                else:
-                    js_files.extend(file_part)
-            embed_part = module.embedded_css()
-            if embed_part:
-                css_embed.append(utf8(embed_part))
-            file_part = module.css_files()
-            if file_part:
-                if isinstance(file_part, (unicode_type, bytes)):
-                    css_files.append(_unicode(file_part))
-                else:
-                    css_files.extend(file_part)
-            head_part = module.html_head()
-            if head_part:
-                html_heads.append(utf8(head_part))
-            body_part = module.html_body()
-            if body_part:
-                html_bodies.append(utf8(body_part))
-
-        if js_files:
-            # Maintain order of JavaScript files given by modules
-            js = self.render_linked_js(js_files)
-            sloc = html.rindex(b"</body>")
-            html = html[:sloc] + utf8(js) + b"\n" + html[sloc:]
-        if js_embed:
-            js_bytes = self.render_embed_js(js_embed)
-            sloc = html.rindex(b"</body>")
-            html = html[:sloc] + js_bytes + b"\n" + html[sloc:]
-        if css_files:
-            css = self.render_linked_css(css_files)
-            hloc = html.index(b"</head>")
-            html = html[:hloc] + utf8(css) + b"\n" + html[hloc:]
-        if css_embed:
-            css_bytes = self.render_embed_css(css_embed)
-            hloc = html.index(b"</head>")
-            html = html[:hloc] + css_bytes + b"\n" + html[hloc:]
-        if html_heads:
-            hloc = html.index(b"</head>")
-            html = html[:hloc] + b"".join(html_heads) + b"\n" + html[hloc:]
-        if html_bodies:
-            hloc = html.index(b"</body>")
-            html = html[:hloc] + b"".join(html_bodies) + b"\n" + html[hloc:]
-        return self.finish(html)
-
-    def render_linked_js(self, js_files: Iterable[str]) -> str:
-        """Default method used to render the final js links for the
-        rendered webpage.
-
-        Override this method in a sub-classed controller to change the output.
-        """
-        paths = []
-        unique_paths = set()  # type: Set[str]
-
-        for path in js_files:
-            if not is_absolute(path):
-                path = self.static_url(path)
-            if path not in unique_paths:
-                paths.append(path)
-                unique_paths.add(path)
-
-        return "".join(
-            '<script src="'
-            + escape.xhtml_escape(p)
-            + '" type="text/javascript"></script>'
-            for p in paths
-        )
-
-    def render_embed_js(self, js_embed: Iterable[bytes]) -> bytes:
-        """Default method used to render the final embedded js for the
-        rendered webpage.
-
-        Override this method in a sub-classed controller to change the output.
-        """
-        return (
-            b'<script type="text/javascript">\n//<![CDATA[\n'
-            + b"\n".join(js_embed)
-            + b"\n//]]>\n</script>"
-        )
-
-    def render_linked_css(self, css_files: Iterable[str]) -> str:
-        """Default method used to render the final css links for the
-        rendered webpage.
-
-        Override this method in a sub-classed controller to change the output.
-        """
-        paths = []
-        unique_paths = set()  # type: Set[str]
-
-        for path in css_files:
-            if not is_absolute(path):
-                path = self.static_url(path)
-            if path not in unique_paths:
-                paths.append(path)
-                unique_paths.add(path)
-
-        return "".join(
-            '<link href="' + escape.xhtml_escape(p) + '" '
-            'type="text/css" rel="stylesheet"/>'
-            for p in paths
-        )
-
-    def render_embed_css(self, css_embed: Iterable[bytes]) -> bytes:
-        """Default method used to render the final embedded css for the
-        rendered webpage.
-
-        Override this method in a sub-classed controller to change the output.
-        """
-        return b'<style type="text/css">\n' + b"\n".join(css_embed) + b"\n</style>"
-
-    def render_string(self, template_name: str, **kwargs: Any) -> bytes:
-        """Generate the given template with the given arguments.
-
-        We return the generated byte string (in utf8). To generate and
-        write a template as a response, use render() above.
-        """
-        # If no template_path is specified, use the path of the calling file
-        template_path = self.get_template_path()
-        if not template_path:
-            frame = sys._getframe(0)
-            web_file = frame.f_code.co_filename
-            while frame.f_code.co_filename == web_file:
-                frame = frame.f_back
-            assert frame.f_code.co_filename is not None
-            template_path = os.path.dirname(frame.f_code.co_filename)
-        with RequestHandler._template_loader_lock:
-            if template_path not in RequestHandler._template_loaders:
-                loader = self.create_template_loader(template_path)
-                RequestHandler._template_loaders[template_path] = loader
-            else:
-                loader = RequestHandler._template_loaders[template_path]
-        t = loader.load(template_name)
-        namespace = self.get_template_namespace()
-        namespace.update(kwargs)
-        return t.generate(**namespace)
-
-    def get_template_namespace(self) -> Dict[str, Any]:
-        """Returns a dictionary to be used as the default template namespace.
-
-        May be overridden by subclasses to add or modify values.
-
-        The results of this method will be combined with additional
-        defaults in the `tornado.template` module and keyword arguments
-        to `render` or `render_string`.
-        """
-        namespace = dict(
-            handler=self,
-            request=self.request,
-            current_user=self.current_user,
-            locale=self.locale,
-            _=self.locale.translate,
-            pgettext=self.locale.pgettext,
-            static_url=self.static_url,
-            xsrf_form_html=self.xsrf_form_html,
-            reverse_url=self.reverse_url,
-        )
-        namespace.update(self.ui)
-        return namespace
-
-    def create_template_loader(self, template_path: str) -> template.BaseLoader:
-        """Returns a new template loader for the given path.
-
-        May be overridden by subclasses.  By default returns a
-        directory-based loader on the given path, using the
-        ``autoescape`` and ``template_whitespace`` application
-        settings.  If a ``template_loader`` application setting is
-        supplied, uses that instead.
-        """
-        settings = self.application.settings
-        if "template_loader" in settings:
-            return settings["template_loader"]
-        kwargs = {}
-        if "autoescape" in settings:
-            # autoescape=None means "no escaping", so we have to be sure
-            # to only pass this kwarg if the user asked for it.
-            kwargs["autoescape"] = settings["autoescape"]
-        if "template_whitespace" in settings:
-            kwargs["whitespace"] = settings["template_whitespace"]
-        return template.Loader(template_path, **kwargs)
-
-    def flush(self, include_footers: bool = False) -> "Future[None]":
-        """Flushes the current output buffer to the network.
-
-        The ``callback`` argument, if given, can be used for flow control:
-        it will be run when all flushed data has been written to the socket.
-        Note that only one flush callback can be outstanding at a time;
-        if another flush occurs before the previous flush's callback
-        has been run, the previous callback will be discarded.
-
-        .. versionchanged:: 4.0
-           Now returns a `.Future` if no callback is given.
-
-        .. versionchanged:: 6.0
-
-           The ``callback`` argument was removed.
-        """
-        assert self.request.connection is not None
-        chunk = b"".join(self._write_buffer)
-        self._write_buffer = []
-        if not self._headers_written:
-            self._headers_written = True
-            for transform in self._transforms:
-                assert chunk is not None
-                self._status_code, self._headers, chunk = transform.transform_first_chunk(
-                    self._status_code, self._headers, chunk, include_footers
-                )
-            # Ignore the chunk and only write the headers for HEAD requests
-            if self.request.method == "HEAD":
-                chunk = b""
-
-            # Finalize the cookie headers (which have been stored in a side
-            # object so an outgoing cookie could be overwritten before it
-            # is sent).
-            if hasattr(self, "_new_cookie"):
-                for cookie in self._new_cookie.values():
-                    self.add_header("Set-Cookie", cookie.OutputString(None))
-
-            start_line = httputil.ResponseStartLine("", self._status_code, self._reason)
-            return self.request.connection.write_headers(
-                start_line, self._headers, chunk
-            )
-        else:
-            for transform in self._transforms:
-                chunk = transform.transform_chunk(chunk, include_footers)
-            # Ignore the chunk and only write the headers for HEAD requests
-            if self.request.method != "HEAD":
-                return self.request.connection.write(chunk)
-            else:
-                future = Future()  # type: Future[None]
-                future.set_result(None)
-                return future
-
-    def finish(self, chunk: Union[str, bytes, dict] = None) -> "Future[None]":
-        """Finishes this response, ending the HTTP request.
-
-        Passing a ``chunk`` to ``finish()`` is equivalent to passing that
-        chunk to ``write()`` and then calling ``finish()`` with no arguments.
-
-        Returns a `.Future` which may optionally be awaited to track the sending
-        of the response to the client. This `.Future` resolves when all the response
-        data has been sent, and raises an error if the connection is closed before all
-        data can be sent.
-
-        .. versionchanged:: 5.1
-
-           Now returns a `.Future` instead of ``None``.
-        """
-        if self._finished:
-            raise RuntimeError("finish() called twice")
-
-        if chunk is not None:
-            self.write(chunk)
-
-        # Automatically support ETags and add the Content-Length header if
-        # we have not flushed any content yet.
-        if not self._headers_written:
-            if (
-                self._status_code == 200
-                and self.request.method in ("GET", "HEAD")
-                and "Etag" not in self._headers
-            ):
-                self.set_etag_header()
-                if self.check_etag_header():
-                    self._write_buffer = []
-                    self.set_status(304)
-            if self._status_code in (204, 304) or (
-                self._status_code >= 100 and self._status_code < 200
-            ):
-                assert not self._write_buffer, (
-                    "Cannot send body with %s" % self._status_code
-                )
-                self._clear_headers_for_304()
-            elif "Content-Length" not in self._headers:
-                content_length = sum(len(part) for part in self._write_buffer)
-                self.set_header("Content-Length", content_length)
-
-        assert self.request.connection is not None
-        # Now that the request is finished, clear the callback we
-        # set on the HTTPConnection (which would otherwise prevent the
-        # garbage collection of the RequestHandler when there
-        # are keepalive connections)
-        self.request.connection.set_close_callback(None)  # type: ignore
-
-        future = self.flush(include_footers=True)
-        self.request.connection.finish()
-        self._log()
-        self._finished = True
-        self.on_finish()
-        self._break_cycles()
-        return future
-
-    def detach(self) -> iostream.IOStream:
-        """Take control of the underlying stream.
-
-        Returns the underlying `.IOStream` object and stops all
-        further HTTP processing. Intended for implementing protocols
-        like websockets that tunnel over an HTTP handshake.
-
-        This method is only supported when HTTP/1.1 is used.
-
-        .. versionadded:: 5.1
-        """
-        self._finished = True
-        # TODO: add detach to HTTPConnection?
-        return self.request.connection.detach()  # type: ignore
-
-    def _break_cycles(self) -> None:
-        # Break up a reference cycle between this handler and the
-        # _ui_module closures to allow for faster GC on CPython.
-        self.ui = None  # type: ignore
-
-    def send_error(self, status_code: int = 500, **kwargs: Any) -> None:
-        """Sends the given HTTP error code to the browser.
-
-        If `flush()` has already been called, it is not possible to send
-        an error, so this method will simply terminate the response.
-        If output has been written but not yet flushed, it will be discarded
-        and replaced with the error page.
-
-        Override `write_error()` to customize the error page that is returned.
-        Additional keyword arguments are passed through to `write_error`.
-        """
-        if self._headers_written:
-            gen_log.error("Cannot send error response after headers written")
-            if not self._finished:
-                # If we get an error between writing headers and finishing,
-                # we are unlikely to be able to finish due to a
-                # Content-Length mismatch. Try anyway to release the
-                # socket.
-                try:
-                    self.finish()
-                except Exception:
-                    gen_log.error("Failed to flush partial response", exc_info=True)
-            return
-        self.clear()
-
-        reason = kwargs.get("reason")
-        if "exc_info" in kwargs:
-            exception = kwargs["exc_info"][1]
-            if isinstance(exception, HTTPError) and exception.reason:
-                reason = exception.reason
-        self.set_status(status_code, reason=reason)
-        try:
-            self.write_error(status_code, **kwargs)
-        except Exception:
-            app_log.error("Uncaught exception in write_error", exc_info=True)
-        if not self._finished:
-            self.finish()
-
-    def write_error(self, status_code: int, **kwargs: Any) -> None:
-        """Override to implement custom error pages.
-
-        ``write_error`` may call `write`, `render`, `set_header`, etc
-        to produce output as usual.
-
-        If this error was caused by an uncaught exception (including
-        HTTPError), an ``exc_info`` triple will be available as
-        ``kwargs["exc_info"]``.  Note that this exception may not be
-        the "current" exception for purposes of methods like
-        ``sys.exc_info()`` or ``traceback.format_exc``.
-        """
-        if self.settings.get("serve_traceback") and "exc_info" in kwargs:
-            # in debug mode, try to send a traceback
-            self.set_header("Content-Type", "text/plain")
-            for line in traceback.format_exception(*kwargs["exc_info"]):
-                self.write(line)
-            self.finish()
-        else:
-            self.finish(
-                "<html><title>%(code)d: %(message)s</title>"
-                "<body>%(code)d: %(message)s</body></html>"
-                % {"code": status_code, "message": self._reason}
-            )
-
-    @property
-    def locale(self) -> tornado.locale.Locale:
-        """The locale for the current session.
-
-        Determined by either `get_user_locale`, which you can override to
-        set the locale based on, e.g., a user preference stored in a
-        database, or `get_browser_locale`, which uses the ``Accept-Language``
-        header.
-
-        .. versionchanged: 4.1
-           Added a property setter.
-        """
-        if not hasattr(self, "_locale"):
-            loc = self.get_user_locale()
-            if loc is not None:
-                self._locale = loc
-            else:
-                self._locale = self.get_browser_locale()
-                assert self._locale
-        return self._locale
-
-    @locale.setter
-    def locale(self, value: tornado.locale.Locale) -> None:
-        self._locale = value
-
-    def get_user_locale(self) -> Optional[tornado.locale.Locale]:
-        """Override to determine the locale from the authenticated user.
-
-        If None is returned, we fall back to `get_browser_locale()`.
-
-        This method should return a `tornado.locale.Locale` object,
-        most likely obtained via a call like ``tornado.locale.get("en")``
-        """
-        return None
-
-    def get_browser_locale(self, default: str = "en_US") -> tornado.locale.Locale:
-        """Determines the user's locale from ``Accept-Language`` header.
-
-        See http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.4
-        """
-        if "Accept-Language" in self.request.headers:
-            languages = self.request.headers["Accept-Language"].split(",")
-            locales = []
-            for language in languages:
-                parts = language.strip().split(";")
-                if len(parts) > 1 and parts[1].startswith("q="):
-                    try:
-                        score = float(parts[1][2:])
-                    except (ValueError, TypeError):
-                        score = 0.0
-                else:
-                    score = 1.0
-                locales.append((parts[0], score))
-            if locales:
-                locales.sort(key=lambda pair: pair[1], reverse=True)
-                codes = [l[0] for l in locales]
-                return locale.get(*codes)
-        return locale.get(default)
-
-    @property
-    def current_user(self) -> Any:
-        """The authenticated user for this request.
-
-        This is set in one of two ways:
-
-        * A subclass may override `get_current_user()`, which will be called
-          automatically the first time ``self.current_user`` is accessed.
-          `get_current_user()` will only be called once per request,
-          and is cached for future access::
-
-              def get_current_user(self):
-                  user_cookie = self.get_secure_cookie("user")
-                  if user_cookie:
-                      return json.loads(user_cookie)
-                  return None
-
-        * It may be set as a normal variable, typically from an overridden
-          `prepare()`::
-
-              @gen.coroutine
-              def prepare(self):
-                  user_id_cookie = self.get_secure_cookie("user_id")
-                  if user_id_cookie:
-                      self.current_user = yield load_user(user_id_cookie)
-
-        Note that `prepare()` may be a coroutine while `get_current_user()`
-        may not, so the latter form is necessary if loading the user requires
-        asynchronous operations.
-
-        The user object may be any type of the application's choosing.
-        """
-        if not hasattr(self, "_current_user"):
-            self._current_user = self.get_current_user()
-        return self._current_user
-
-    @current_user.setter
-    def current_user(self, value: Any) -> None:
-        self._current_user = value
-
-    def get_current_user(self) -> Any:
-        """Override to determine the current user from, e.g., a cookie.
-
-        This method may not be a coroutine.
-        """
-        return None
-
-    def get_login_url(self) -> str:
-        """Override to customize the login URL based on the request.
-
-        By default, we use the ``login_url`` application setting.
-        """
-        self.require_setting("login_url", "@tornado.web.authenticated")
-        return self.application.settings["login_url"]
-
-    def get_template_path(self) -> Optional[str]:
-        """Override to customize template path for each handler.
-
-        By default, we use the ``template_path`` application setting.
-        Return None to load templates relative to the calling file.
-        """
-        return self.application.settings.get("template_path")
-
-    @property
-    def xsrf_token(self) -> bytes:
-        """The XSRF-prevention token for the current user/session.
-
-        To prevent cross-site request forgery, we set an '_xsrf' cookie
-        and include the same '_xsrf' value as an argument with all POST
-        requests. If the two do not match, we reject the form submission
-        as a potential forgery.
-
-        See http://en.wikipedia.org/wiki/Cross-site_request_forgery
-
-        This property is of type `bytes`, but it contains only ASCII
-        characters. If a character string is required, there is no
-        need to base64-encode it; just decode the byte string as
-        UTF-8.
-
-        .. versionchanged:: 3.2.2
-           The xsrf token will now be have a random mask applied in every
-           request, which makes it safe to include the token in pages
-           that are compressed.  See http://breachattack.com for more
-           information on the issue fixed by this change.  Old (version 1)
-           cookies will be converted to version 2 when this method is called
-           unless the ``xsrf_cookie_version`` `Application` setting is
-           set to 1.
-
-        .. versionchanged:: 4.3
-           The ``xsrf_cookie_kwargs`` `Application` setting may be
-           used to supply additional cookie options (which will be
-           passed directly to `set_cookie`). For example,
-           ``xsrf_cookie_kwargs=dict(httponly=True, secure=True)``
-           will set the ``secure`` and ``httponly`` flags on the
-           ``_xsrf`` cookie.
-        """
-        if not hasattr(self, "_xsrf_token"):
-            version, token, timestamp = self._get_raw_xsrf_token()
-            output_version = self.settings.get("xsrf_cookie_version", 2)
-            cookie_kwargs = self.settings.get("xsrf_cookie_kwargs", {})
-            if output_version == 1:
-                self._xsrf_token = binascii.b2a_hex(token)
-            elif output_version == 2:
-                mask = os.urandom(4)
-                self._xsrf_token = b"|".join(
-                    [
-                        b"2",
-                        binascii.b2a_hex(mask),
-                        binascii.b2a_hex(_websocket_mask(mask, token)),
-                        utf8(str(int(timestamp))),
-                    ]
-                )
-            else:
-                raise ValueError("unknown xsrf cookie version %d", output_version)
-            if version is None:
-                if self.current_user and "expires_days" not in cookie_kwargs:
-                    cookie_kwargs["expires_days"] = 30
-                self.set_cookie("_xsrf", self._xsrf_token, **cookie_kwargs)
-        return self._xsrf_token
-
-    def _get_raw_xsrf_token(self) -> Tuple[Optional[int], bytes, float]:
-        """Read or generate the xsrf token in its raw form.
-
-        The raw_xsrf_token is a tuple containing:
-
-        * version: the version of the cookie from which this token was read,
-          or None if we generated a new token in this request.
-        * token: the raw token data; random (non-ascii) bytes.
-        * timestamp: the time this token was generated (will not be accurate
-          for version 1 cookies)
-        """
-        if not hasattr(self, "_raw_xsrf_token"):
-            cookie = self.get_cookie("_xsrf")
-            if cookie:
-                version, token, timestamp = self._decode_xsrf_token(cookie)
-            else:
-                version, token, timestamp = None, None, None
-            if token is None:
-                version = None
-                token = os.urandom(16)
-                timestamp = time.time()
-            assert token is not None
-            assert timestamp is not None
-            self._raw_xsrf_token = (version, token, timestamp)
-        return self._raw_xsrf_token
-
-    def _decode_xsrf_token(
-        self, cookie: str
-    ) -> Tuple[Optional[int], Optional[bytes], Optional[float]]:
-        """Convert a cookie string into a the tuple form returned by
-        _get_raw_xsrf_token.
-        """
-
-        try:
-            m = _signed_value_version_re.match(utf8(cookie))
-
-            if m:
-                version = int(m.group(1))
-                if version == 2:
-                    _, mask_str, masked_token, timestamp_str = cookie.split("|")
-
-                    mask = binascii.a2b_hex(utf8(mask_str))
-                    token = _websocket_mask(mask, binascii.a2b_hex(utf8(masked_token)))
-                    timestamp = int(timestamp_str)
-                    return version, token, timestamp
-                else:
-                    # Treat unknown versions as not present instead of failing.
-                    raise Exception("Unknown xsrf cookie version")
-            else:
-                version = 1
-                try:
-                    token = binascii.a2b_hex(utf8(cookie))
-                except (binascii.Error, TypeError):
-                    token = utf8(cookie)
-                # We don't have a usable timestamp in older versions.
-                timestamp = int(time.time())
-                return (version, token, timestamp)
-        except Exception:
-            # Catch exceptions and return nothing instead of failing.
-            gen_log.debug("Uncaught exception in _decode_xsrf_token", exc_info=True)
-            return None, None, None
-
-    def check_xsrf_cookie(self) -> None:
-        """Verifies that the ``_xsrf`` cookie matches the ``_xsrf`` argument.
-
-        To prevent cross-site request forgery, we set an ``_xsrf``
-        cookie and include the same value as a non-cookie
-        field with all ``POST`` requests. If the two do not match, we
-        reject the form submission as a potential forgery.
-
-        The ``_xsrf`` value may be set as either a form field named ``_xsrf``
-        or in a custom HTTP header named ``X-XSRFToken`` or ``X-CSRFToken``
-        (the latter is accepted for compatibility with Django).
-
-        See http://en.wikipedia.org/wiki/Cross-site_request_forgery
-
-        .. versionchanged:: 3.2.2
-           Added support for cookie version 2.  Both versions 1 and 2 are
-           supported.
-        """
-        # Prior to release 1.1.1, this check was ignored if the HTTP header
-        # ``X-Requested-With: XMLHTTPRequest`` was present.  This exception
-        # has been shown to be insecure and has been removed.  For more
-        # information please see
-        # http://www.djangoproject.com/weblog/2011/feb/08/security/
-        # http://weblog.rubyonrails.org/2011/2/8/csrf-protection-bypass-in-ruby-on-rails
-        token = (
-            self.get_argument("_xsrf", None)
-            or self.request.headers.get("X-Xsrftoken")
-            or self.request.headers.get("X-Csrftoken")
-        )
-        if not token:
-            raise HTTPError(403, "'_xsrf' argument missing from POST")
-        _, token, _ = self._decode_xsrf_token(token)
-        _, expected_token, _ = self._get_raw_xsrf_token()
-        if not token:
-            raise HTTPError(403, "'_xsrf' argument has invalid format")
-        if not hmac.compare_digest(utf8(token), utf8(expected_token)):
-            raise HTTPError(403, "XSRF cookie does not match POST argument")
-
-    def xsrf_form_html(self) -> str:
-        """An HTML ``<input/>`` element to be included with all POST forms.
-
-        It defines the ``_xsrf`` input value, which we check on all POST
-        requests to prevent cross-site request forgery. If you have set
-        the ``xsrf_cookies`` application setting, you must include this
-        HTML within all of your HTML forms.
-
-        In a template, this method should be called with ``{% module
-        xsrf_form_html() %}``
-
-        See `check_xsrf_cookie()` above for more information.
-        """
-        return (
-            '<input type="hidden" name="_xsrf" value="'
-            + escape.xhtml_escape(self.xsrf_token)
-            + '"/>'
-        )
-
-    def static_url(self, path: str, include_host: bool = None, **kwargs: Any) -> str:
-        """Returns a static URL for the given relative static file path.
-
-        This method requires you set the ``static_path`` setting in your
-        application (which specifies the root directory of your static
-        files).
-
-        This method returns a versioned url (by default appending
-        ``?v=<signature>``), which allows the static files to be
-        cached indefinitely.  This can be disabled by passing
-        ``include_version=False`` (in the default implementation;
-        other static file implementations are not required to support
-        this, but they may support other options).
-
-        By default this method returns URLs relative to the current
-        host, but if ``include_host`` is true the URL returned will be
-        absolute.  If this handler has an ``include_host`` attribute,
-        that value will be used as the default for all `static_url`
-        calls that do not pass ``include_host`` as a keyword argument.
-
-        """
-        self.require_setting("static_path", "static_url")
-        get_url = self.settings.get(
-            "static_handler_class", StaticFileHandler
-        ).make_static_url
-
-        if include_host is None:
-            include_host = getattr(self, "include_host", False)
-
-        if include_host:
-            base = self.request.protocol + "://" + self.request.host
-        else:
-            base = ""
-
-        return base + get_url(self.settings, path, **kwargs)
-
-    def require_setting(self, name: str, feature: str = "this feature") -> None:
-        """Raises an exception if the given app setting is not defined."""
-        if not self.application.settings.get(name):
-            raise Exception(
-                "You must define the '%s' setting in your "
-                "application to use %s" % (name, feature)
-            )
-
-    def reverse_url(self, name: str, *args: Any) -> str:
-        """Alias for `Application.reverse_url`."""
-        return self.application.reverse_url(name, *args)
-
-    def compute_etag(self) -> Optional[str]:
-        """Computes the etag header to be used for this request.
-
-        By default uses a hash of the content written so far.
-
-        May be overridden to provide custom etag implementations,
-        or may return None to disable tornado's default etag support.
-        """
-        hasher = hashlib.sha1()
-        for part in self._write_buffer:
-            hasher.update(part)
-        return '"%s"' % hasher.hexdigest()
-
-    def set_etag_header(self) -> None:
-        """Sets the response's Etag header using ``self.compute_etag()``.
-
-        Note: no header will be set if ``compute_etag()`` returns ``None``.
-
-        This method is called automatically when the request is finished.
-        """
-        etag = self.compute_etag()
-        if etag is not None:
-            self.set_header("Etag", etag)
-
-    def check_etag_header(self) -> bool:
-        """Checks the ``Etag`` header against requests's ``If-None-Match``.
-
-        Returns ``True`` if the request's Etag matches and a 304 should be
-        returned. For example::
-
-            self.set_etag_header()
-            if self.check_etag_header():
-                self.set_status(304)
-                return
-
-        This method is called automatically when the request is finished,
-        but may be called earlier for applications that override
-        `compute_etag` and want to do an early check for ``If-None-Match``
-        before completing the request.  The ``Etag`` header should be set
-        (perhaps with `set_etag_header`) before calling this method.
-        """
-        computed_etag = utf8(self._headers.get("Etag", ""))
-        # Find all weak and strong etag values from If-None-Match header
-        # because RFC 7232 allows multiple etag values in a single header.
-        etags = re.findall(
-            br'\*|(?:W/)?"[^"]*"', utf8(self.request.headers.get("If-None-Match", ""))
-        )
-        if not computed_etag or not etags:
-            return False
-
-        match = False
-        if etags[0] == b"*":
-            match = True
-        else:
-            # Use a weak comparison when comparing entity-tags.
-            def val(x: bytes) -> bytes:
-                return x[2:] if x.startswith(b"W/") else x
-
-            for etag in etags:
-                if val(etag) == val(computed_etag):
-                    match = True
-                    break
-        return match
-
-    async def _execute(
-        self, transforms: List["OutputTransform"], *args: bytes, **kwargs: bytes
-    ) -> None:
-        """Executes this request with the given output transforms."""
-        self._transforms = transforms
-        try:
-            if self.request.method not in self.SUPPORTED_METHODS:
-                raise HTTPError(405)
-            self.path_args = [self.decode_argument(arg) for arg in args]
-            self.path_kwargs = dict(
-                (k, self.decode_argument(v, name=k)) for (k, v) in kwargs.items()
-            )
-            # If XSRF cookies are turned on, reject form submissions without
-            # the proper cookie
-            if self.request.method not in (
-                "GET",
-                "HEAD",
-                "OPTIONS",
-            ) and self.application.settings.get("xsrf_cookies"):
-                self.check_xsrf_cookie()
-
-            result = self.prepare()
-            if result is not None:
-                result = await result
-            if self._prepared_future is not None:
-                # Tell the Application we've finished with prepare()
-                # and are ready for the body to arrive.
-                future_set_result_unless_cancelled(self._prepared_future, None)
-            if self._finished:
-                return
-
-            if _has_stream_request_body(self.__class__):
-                # In streaming mode request.body is a Future that signals
-                # the body has been completely received.  The Future has no
-                # result; the data has been passed to self.data_received
-                # instead.
-                try:
-                    await self.request._body_future
-                except iostream.StreamClosedError:
-                    return
-
-            method = getattr(self, self.request.method.lower())
-            result = method(*self.path_args, **self.path_kwargs)
-            if result is not None:
-                result = await result
-            if self._auto_finish and not self._finished:
-                self.finish()
-        except Exception as e:
-            try:
-                self._handle_request_exception(e)
-            except Exception:
-                app_log.error("Exception in exception handler", exc_info=True)
-            finally:
-                # Unset result to avoid circular references
-                result = None
-            if self._prepared_future is not None and not self._prepared_future.done():
-                # In case we failed before setting _prepared_future, do it
-                # now (to unblock the HTTP server).  Note that this is not
-                # in a finally block to avoid GC issues prior to Python 3.4.
-                self._prepared_future.set_result(None)
-
-    def data_received(self, chunk: bytes) -> Optional[Awaitable[None]]:
-        """Implement this method to handle streamed request data.
-
-        Requires the `.stream_request_body` decorator.
-
-        May be a coroutine for flow control.
-        """
-        raise NotImplementedError()
-
-    def _log(self) -> None:
-        """Logs the current request.
-
-        Sort of deprecated since this functionality was moved to the
-        Application, but left in place for the benefit of existing apps
-        that have overridden this method.
-        """
-        self.application.log_request(self)
-
-    def _request_summary(self) -> str:
-        return "%s %s (%s)" % (
-            self.request.method,
-            self.request.uri,
-            self.request.remote_ip,
-        )
-
-    def _handle_request_exception(self, e: BaseException) -> None:
-        if isinstance(e, Finish):
-            # Not an error; just finish the request without logging.
-            if not self._finished:
-                self.finish(*e.args)
-            return
-        try:
-            self.log_exception(*sys.exc_info())
-        except Exception:
-            # An error here should still get a best-effort send_error()
-            # to avoid leaking the connection.
-            app_log.error("Error in exception logger", exc_info=True)
-        if self._finished:
-            # Extra errors after the request has been finished should
-            # be logged, but there is no reason to continue to try and
-            # send a response.
-            return
-        if isinstance(e, HTTPError):
-            self.send_error(e.status_code, exc_info=sys.exc_info())
-        else:
-            self.send_error(500, exc_info=sys.exc_info())
-
-    def log_exception(
-        self,
-        typ: "Optional[Type[BaseException]]",
-        value: Optional[BaseException],
-        tb: Optional[TracebackType],
-    ) -> None:
-        """Override to customize logging of uncaught exceptions.
-
-        By default logs instances of `HTTPError` as warnings without
-        stack traces (on the ``tornado.general`` logger), and all
-        other exceptions as errors with stack traces (on the
-        ``tornado.application`` logger).
-
-        .. versionadded:: 3.1
-        """
-        if isinstance(value, HTTPError):
-            if value.log_message:
-                format = "%d %s: " + value.log_message
-                args = [value.status_code, self._request_summary()] + list(value.args)
-                gen_log.warning(format, *args)
-        else:
-            app_log.error(  # type: ignore
-                "Uncaught exception %s\n%r",
-                self._request_summary(),
-                self.request,
-                exc_info=(typ, value, tb),
-            )
-
-    def _ui_module(self, name: str, module: Type["UIModule"]) -> Callable[..., str]:
-        def render(*args, **kwargs) -> str:  # type: ignore
-            if not hasattr(self, "_active_modules"):
-                self._active_modules = {}  # type: Dict[str, UIModule]
-            if name not in self._active_modules:
-                self._active_modules[name] = module(self)
-            rendered = self._active_modules[name].render(*args, **kwargs)
-            return rendered
-
-        return render
-
-    def _ui_method(self, method: Callable[..., str]) -> Callable[..., str]:
-        return lambda *args, **kwargs: method(self, *args, **kwargs)
-
-    def _clear_headers_for_304(self) -> None:
-        # 304 responses should not contain entity headers (defined in
-        # http://www.w3.org/Protocols/rfc2616/rfc2616-sec7.html#sec7.1)
-        # not explicitly allowed by
-        # http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.3.5
-        headers = [
-            "Allow",
-            "Content-Encoding",
-            "Content-Language",
-            "Content-Length",
-            "Content-MD5",
-            "Content-Range",
-            "Content-Type",
-            "Last-Modified",
-        ]
-        for h in headers:
-            self.clear_header(h)
-
-
-def stream_request_body(cls: Type[RequestHandler]) -> Type[RequestHandler]:
-    """Apply to `RequestHandler` subclasses to enable streaming body support.
-
-    This decorator implies the following changes:
-
-    * `.HTTPServerRequest.body` is undefined, and body arguments will not
-      be included in `RequestHandler.get_argument`.
-    * `RequestHandler.prepare` is called when the request headers have been
-      read instead of after the entire body has been read.
-    * The subclass must define a method ``data_received(self, data):``, which
-      will be called zero or more times as data is available.  Note that
-      if the request has an empty body, ``data_received`` may not be called.
-    * ``prepare`` and ``data_received`` may return Futures (such as via
-      ``@gen.coroutine``, in which case the next method will not be called
-      until those futures have completed.
-    * The regular HTTP method (``post``, ``put``, etc) will be called after
-      the entire body has been read.
-
-    See the `file receiver demo <https://github.com/tornadoweb/tornado/tree/master/demos/file_upload/>`_
-    for example usage.
-    """  # noqa: E501
-    if not issubclass(cls, RequestHandler):
-        raise TypeError("expected subclass of RequestHandler, got %r", cls)
-    cls._stream_request_body = True
-    return cls
-
-
-def _has_stream_request_body(cls: Type[RequestHandler]) -> bool:
-    if not issubclass(cls, RequestHandler):
-        raise TypeError("expected subclass of RequestHandler, got %r", cls)
-    return cls._stream_request_body
-
-
-def removeslash(
-    method: Callable[..., Optional[Awaitable[None]]]
-) -> Callable[..., Optional[Awaitable[None]]]:
-    """Use this decorator to remove trailing slashes from the request path.
-
-    For example, a request to ``/foo/`` would redirect to ``/foo`` with this
-    decorator. Your request handler mapping should use a regular expression
-    like ``r'/foo/*'`` in conjunction with using the decorator.
-    """
-
-    @functools.wraps(method)
-    def wrapper(  # type: ignore
-        self: RequestHandler, *args, **kwargs
-    ) -> Optional[Awaitable[None]]:
-        if self.request.path.endswith("/"):
-            if self.request.method in ("GET", "HEAD"):
-                uri = self.request.path.rstrip("/")
-                if uri:  # don't try to redirect '/' to ''
-                    if self.request.query:
-                        uri += "?" + self.request.query
-                    self.redirect(uri, permanent=True)
-                    return None
-            else:
-                raise HTTPError(404)
-        return method(self, *args, **kwargs)
-
-    return wrapper
-
-
-def addslash(
-    method: Callable[..., Optional[Awaitable[None]]]
-) -> Callable[..., Optional[Awaitable[None]]]:
-    """Use this decorator to add a missing trailing slash to the request path.
-
-    For example, a request to ``/foo`` would redirect to ``/foo/`` with this
-    decorator. Your request handler mapping should use a regular expression
-    like ``r'/foo/?'`` in conjunction with using the decorator.
-    """
-
-    @functools.wraps(method)
-    def wrapper(  # type: ignore
-        self: RequestHandler, *args, **kwargs
-    ) -> Optional[Awaitable[None]]:
-        if not self.request.path.endswith("/"):
-            if self.request.method in ("GET", "HEAD"):
-                uri = self.request.path + "/"
-                if self.request.query:
-                    uri += "?" + self.request.query
-                self.redirect(uri, permanent=True)
-                return None
-            raise HTTPError(404)
-        return method(self, *args, **kwargs)
-
-    return wrapper
-
-
-class _ApplicationRouter(ReversibleRuleRouter):
-    """Routing implementation used internally by `Application`.
-
-    Provides a binding between `Application` and `RequestHandler`.
-    This implementation extends `~.routing.ReversibleRuleRouter` in a couple of ways:
-        * it allows to use `RequestHandler` subclasses as `~.routing.Rule` target and
-        * it allows to use a list/tuple of rules as `~.routing.Rule` target.
-        ``process_rule`` implementation will substitute this list with an appropriate
-        `_ApplicationRouter` instance.
-    """
-
-    def __init__(self, application: "Application", rules: _RuleList = None) -> None:
-        assert isinstance(application, Application)
-        self.application = application
-        super(_ApplicationRouter, self).__init__(rules)
-
-    def process_rule(self, rule: Rule) -> Rule:
-        rule = super(_ApplicationRouter, self).process_rule(rule)
-
-        if isinstance(rule.target, (list, tuple)):
-            rule.target = _ApplicationRouter(  # type: ignore
-                self.application, rule.target
-            )
-
-        return rule
-
-    def get_target_delegate(
-        self, target: Any, request: httputil.HTTPServerRequest, **target_params: Any
-    ) -> Optional[httputil.HTTPMessageDelegate]:
-        if isclass(target) and issubclass(target, RequestHandler):
-            return self.application.get_handler_delegate(
-                request, target, **target_params
-            )
-
-        return super(_ApplicationRouter, self).get_target_delegate(
-            target, request, **target_params
-        )
-
-
-class Application(ReversibleRouter):
-    r"""A collection of request handlers that make up a web application.
-
-    Instances of this class are callable and can be passed directly to
-    HTTPServer to serve the application::
-
-        application = web.Application([
-            (r"/", MainPageHandler),
-        ])
-        http_server = httpserver.HTTPServer(application)
-        http_server.listen(8080)
-        ioloop.IOLoop.current().start()
-
-    The constructor for this class takes in a list of `~.routing.Rule`
-    objects or tuples of values corresponding to the arguments of
-    `~.routing.Rule` constructor: ``(matcher, target, [target_kwargs], [name])``,
-    the values in square brackets being optional. The default matcher is
-    `~.routing.PathMatches`, so ``(regexp, target)`` tuples can also be used
-    instead of ``(PathMatches(regexp), target)``.
-
-    A common routing target is a `RequestHandler` subclass, but you can also
-    use lists of rules as a target, which create a nested routing configuration::
-
-        application = web.Application([
-            (HostMatches("example.com"), [
-                (r"/", MainPageHandler),
-                (r"/feed", FeedHandler),
-            ]),
-        ])
-
-    In addition to this you can use nested `~.routing.Router` instances,
-    `~.httputil.HTTPMessageDelegate` subclasses and callables as routing targets
-    (see `~.routing` module docs for more information).
-
-    When we receive requests, we iterate over the list in order and
-    instantiate an instance of the first request class whose regexp
-    matches the request path. The request class can be specified as
-    either a class object or a (fully-qualified) name.
-
-    A dictionary may be passed as the third element (``target_kwargs``)
-    of the tuple, which will be used as keyword arguments to the handler's
-    constructor and `~RequestHandler.initialize` method. This pattern
-    is used for the `StaticFileHandler` in this example (note that a
-    `StaticFileHandler` can be installed automatically with the
-    static_path setting described below)::
-
-        application = web.Application([
-            (r"/static/(.*)", web.StaticFileHandler, {"path": "/var/www"}),
-        ])
-
-    We support virtual hosts with the `add_handlers` method, which takes in
-    a host regular expression as the first argument::
-
-        application.add_handlers(r"www\.myhost\.com", [
-            (r"/article/([0-9]+)", ArticleHandler),
-        ])
-
-    If there's no match for the current request's host, then ``default_host``
-    parameter value is matched against host regular expressions.
-
-
-    .. warning::
-
-       Applications that do not use TLS may be vulnerable to :ref:`DNS
-       rebinding <dnsrebinding>` attacks. This attack is especially
-       relevant to applications that only listen on ``127.0.0.1`` or
-       other private networks. Appropriate host patterns must be used
-       (instead of the default of ``r'.*'``) to prevent this risk. The
-       ``default_host`` argument must not be used in applications that
-       may be vulnerable to DNS rebinding.
-
-    You can serve static files by sending the ``static_path`` setting
-    as a keyword argument. We will serve those files from the
-    ``/static/`` URI (this is configurable with the
-    ``static_url_prefix`` setting), and we will serve ``/favicon.ico``
-    and ``/robots.txt`` from the same directory.  A custom subclass of
-    `StaticFileHandler` can be specified with the
-    ``static_handler_class`` setting.
-
-    .. versionchanged:: 4.5
-       Integration with the new `tornado.routing` module.
-
-    """
-
-    def __init__(
-        self,
-        handlers: _RuleList = None,
-        default_host: str = None,
-        transforms: List[Type["OutputTransform"]] = None,
-        **settings: Any
-    ) -> None:
-        if transforms is None:
-            self.transforms = []  # type: List[Type[OutputTransform]]
-            if settings.get("compress_response") or settings.get("gzip"):
-                self.transforms.append(GZipContentEncoding)
-        else:
-            self.transforms = transforms
-        self.default_host = default_host
-        self.settings = settings
-        self.ui_modules = {
-            "linkify": _linkify,
-            "xsrf_form_html": _xsrf_form_html,
-            "Template": TemplateModule,
-        }
-        self.ui_methods = {}  # type: Dict[str, Callable[..., str]]
-        self._load_ui_modules(settings.get("ui_modules", {}))
-        self._load_ui_methods(settings.get("ui_methods", {}))
-        if self.settings.get("static_path"):
-            path = self.settings["static_path"]
-            handlers = list(handlers or [])
-            static_url_prefix = settings.get("static_url_prefix", "/static/")
-            static_handler_class = settings.get(
-                "static_handler_class", StaticFileHandler
-            )
-            static_handler_args = settings.get("static_handler_args", {})
-            static_handler_args["path"] = path
-            for pattern in [
-                re.escape(static_url_prefix) + r"(.*)",
-                r"/(favicon\.ico)",
-                r"/(robots\.txt)",
-            ]:
-                handlers.insert(0, (pattern, static_handler_class, static_handler_args))
-
-        if self.settings.get("debug"):
-            self.settings.setdefault("autoreload", True)
-            self.settings.setdefault("compiled_template_cache", False)
-            self.settings.setdefault("static_hash_cache", False)
-            self.settings.setdefault("serve_traceback", True)
-
-        self.wildcard_router = _ApplicationRouter(self, handlers)
-        self.default_router = _ApplicationRouter(
-            self, [Rule(AnyMatches(), self.wildcard_router)]
-        )
-
-        # Automatically reload modified modules
-        if self.settings.get("autoreload"):
-            from tornado import autoreload
-
-            autoreload.start()
-
-    def listen(self, port: int, address: str = "", **kwargs: Any) -> HTTPServer:
-        """Starts an HTTP server for this application on the given port.
-
-        This is a convenience alias for creating an `.HTTPServer`
-        object and calling its listen method.  Keyword arguments not
-        supported by `HTTPServer.listen <.TCPServer.listen>` are passed to the
-        `.HTTPServer` constructor.  For advanced uses
-        (e.g. multi-process mode), do not use this method; create an
-        `.HTTPServer` and call its
-        `.TCPServer.bind`/`.TCPServer.start` methods directly.
-
-        Note that after calling this method you still need to call
-        ``IOLoop.current().start()`` to start the server.
-
-        Returns the `.HTTPServer` object.
-
-        .. versionchanged:: 4.3
-           Now returns the `.HTTPServer` object.
-        """
-        server = HTTPServer(self, **kwargs)
-        server.listen(port, address)
-        return server
-
-    def add_handlers(self, host_pattern: str, host_handlers: _RuleList) -> None:
-        """Appends the given handlers to our handler list.
-
-        Host patterns are processed sequentially in the order they were
-        added. All matching patterns will be considered.
-        """
-        host_matcher = HostMatches(host_pattern)
-        rule = Rule(host_matcher, _ApplicationRouter(self, host_handlers))
-
-        self.default_router.rules.insert(-1, rule)
-
-        if self.default_host is not None:
-            self.wildcard_router.add_rules(
-                [(DefaultHostMatches(self, host_matcher.host_pattern), host_handlers)]
-            )
-
-    def add_transform(self, transform_class: Type["OutputTransform"]) -> None:
-        self.transforms.append(transform_class)
-
-    def _load_ui_methods(self, methods: Any) -> None:
-        if isinstance(methods, types.ModuleType):
-            self._load_ui_methods(dict((n, getattr(methods, n)) for n in dir(methods)))
-        elif isinstance(methods, list):
-            for m in methods:
-                self._load_ui_methods(m)
-        else:
-            for name, fn in methods.items():
-                if (
-                    not name.startswith("_")
-                    and hasattr(fn, "__call__")
-                    and name[0].lower() == name[0]
-                ):
-                    self.ui_methods[name] = fn
-
-    def _load_ui_modules(self, modules: Any) -> None:
-        if isinstance(modules, types.ModuleType):
-            self._load_ui_modules(dict((n, getattr(modules, n)) for n in dir(modules)))
-        elif isinstance(modules, list):
-            for m in modules:
-                self._load_ui_modules(m)
-        else:
-            assert isinstance(modules, dict)
-            for name, cls in modules.items():
-                try:
-                    if issubclass(cls, UIModule):
-                        self.ui_modules[name] = cls
-                except TypeError:
-                    pass
-
-    def __call__(
-        self, request: httputil.HTTPServerRequest
-    ) -> Optional[Awaitable[None]]:
-        # Legacy HTTPServer interface
-        dispatcher = self.find_handler(request)
-        return dispatcher.execute()
-
-    def find_handler(
-        self, request: httputil.HTTPServerRequest, **kwargs: Any
-    ) -> "_HandlerDelegate":
-        route = self.default_router.find_handler(request)
-        if route is not None:
-            return cast("_HandlerDelegate", route)
-
-        if self.settings.get("default_handler_class"):
-            return self.get_handler_delegate(
-                request,
-                self.settings["default_handler_class"],
-                self.settings.get("default_handler_args", {}),
-            )
-
-        return self.get_handler_delegate(request, ErrorHandler, {"status_code": 404})
-
-    def get_handler_delegate(
-        self,
-        request: httputil.HTTPServerRequest,
-        target_class: Type[RequestHandler],
-        target_kwargs: Dict[str, Any] = None,
-        path_args: List[bytes] = None,
-        path_kwargs: Dict[str, bytes] = None,
-    ) -> "_HandlerDelegate":
-        """Returns `~.httputil.HTTPMessageDelegate` that can serve a request
-        for application and `RequestHandler` subclass.
-
-        :arg httputil.HTTPServerRequest request: current HTTP request.
-        :arg RequestHandler target_class: a `RequestHandler` class.
-        :arg dict target_kwargs: keyword arguments for ``target_class`` constructor.
-        :arg list path_args: positional arguments for ``target_class`` HTTP method that
-            will be executed while handling a request (``get``, ``post`` or any other).
-        :arg dict path_kwargs: keyword arguments for ``target_class`` HTTP method.
-        """
-        return _HandlerDelegate(
-            self, request, target_class, target_kwargs, path_args, path_kwargs
-        )
-
-    def reverse_url(self, name: str, *args: Any) -> str:
-        """Returns a URL path for handler named ``name``
-
-        The handler must be added to the application as a named `URLSpec`.
-
-        Args will be substituted for capturing groups in the `URLSpec` regex.
-        They will be converted to strings if necessary, encoded as utf8,
-        and url-escaped.
-        """
-        reversed_url = self.default_router.reverse_url(name, *args)
-        if reversed_url is not None:
-            return reversed_url
-
-        raise KeyError("%s not found in named urls" % name)
-
-    def log_request(self, handler: RequestHandler) -> None:
-        """Writes a completed HTTP request to the logs.
-
-        By default writes to the python root logger.  To change
-        this behavior either subclass Application and override this method,
-        or pass a function in the application settings dictionary as
-        ``log_function``.
-        """
-        if "log_function" in self.settings:
-            self.settings["log_function"](handler)
-            return
-        if handler.get_status() < 400:
-            log_method = access_log.info
-        elif handler.get_status() < 500:
-            log_method = access_log.warning
-        else:
-            log_method = access_log.error
-        request_time = 1000.0 * handler.request.request_time()
-        log_method(
-            "%d %s %.2fms",
-            handler.get_status(),
-            handler._request_summary(),
-            request_time,
-        )
-
-
-class _HandlerDelegate(httputil.HTTPMessageDelegate):
-    def __init__(
-        self,
-        application: Application,
-        request: httputil.HTTPServerRequest,
-        handler_class: Type[RequestHandler],
-        handler_kwargs: Optional[Dict[str, Any]],
-        path_args: Optional[List[bytes]],
-        path_kwargs: Optional[Dict[str, bytes]],
-    ) -> None:
-        self.application = application
-        self.connection = request.connection
-        self.request = request
-        self.handler_class = handler_class
-        self.handler_kwargs = handler_kwargs or {}
-        self.path_args = path_args or []
-        self.path_kwargs = path_kwargs or {}
-        self.chunks = []  # type: List[bytes]
-        self.stream_request_body = _has_stream_request_body(self.handler_class)
-
-    def headers_received(
-        self,
-        start_line: Union[httputil.RequestStartLine, httputil.ResponseStartLine],
-        headers: httputil.HTTPHeaders,
-    ) -> Optional[Awaitable[None]]:
-        if self.stream_request_body:
-            self.request._body_future = Future()
-            return self.execute()
-        return None
-
-    def data_received(self, data: bytes) -> Optional[Awaitable[None]]:
-        if self.stream_request_body:
-            return self.handler.data_received(data)
-        else:
-            self.chunks.append(data)
-            return None
-
-    def finish(self) -> None:
-        if self.stream_request_body:
-            future_set_result_unless_cancelled(self.request._body_future, None)
-        else:
-            self.request.body = b"".join(self.chunks)
-            self.request._parse_body()
-            self.execute()
-
-    def on_connection_close(self) -> None:
-        if self.stream_request_body:
-            self.handler.on_connection_close()
-        else:
-            self.chunks = None  # type: ignore
-
-    def execute(self) -> Optional[Awaitable[None]]:
-        # If template cache is disabled (usually in the debug mode),
-        # re-compile templates and reload static files on every
-        # request so you don't need to restart to see changes
-        if not self.application.settings.get("compiled_template_cache", True):
-            with RequestHandler._template_loader_lock:
-                for loader in RequestHandler._template_loaders.values():
-                    loader.reset()
-        if not self.application.settings.get("static_hash_cache", True):
-            StaticFileHandler.reset()
-
-        self.handler = self.handler_class(
-            self.application, self.request, **self.handler_kwargs
-        )
-        transforms = [t(self.request) for t in self.application.transforms]
-
-        if self.stream_request_body:
-            self.handler._prepared_future = Future()
-        # Note that if an exception escapes handler._execute it will be
-        # trapped in the Future it returns (which we are ignoring here,
-        # leaving it to be logged when the Future is GC'd).
-        # However, that shouldn't happen because _execute has a blanket
-        # except handler, and we cannot easily access the IOLoop here to
-        # call add_future (because of the requirement to remain compatible
-        # with WSGI)
-        fut = gen.convert_yielded(
-            self.handler._execute(transforms, *self.path_args, **self.path_kwargs)
-        )
-        fut.add_done_callback(lambda f: f.result())
-        # If we are streaming the request body, then execute() is finished
-        # when the handler has prepared to receive the body.  If not,
-        # it doesn't matter when execute() finishes (so we return None)
-        return self.handler._prepared_future
-
-
-class HTTPError(Exception):
-    """An exception that will turn into an HTTP error response.
-
-    Raising an `HTTPError` is a convenient alternative to calling
-    `RequestHandler.send_error` since it automatically ends the
-    current function.
-
-    To customize the response sent with an `HTTPError`, override
-    `RequestHandler.write_error`.
-
-    :arg int status_code: HTTP status code.  Must be listed in
-        `httplib.responses <http.client.responses>` unless the ``reason``
-        keyword argument is given.
-    :arg str log_message: Message to be written to the log for this error
-        (will not be shown to the user unless the `Application` is in debug
-        mode).  May contain ``%s``-style placeholders, which will be filled
-        in with remaining positional parameters.
-    :arg str reason: Keyword-only argument.  The HTTP "reason" phrase
-        to pass in the status line along with ``status_code``.  Normally
-        determined automatically from ``status_code``, but can be used
-        to use a non-standard numeric code.
-    """
-
-    def __init__(
-        self, status_code: int = 500, log_message: str = None, *args: Any, **kwargs: Any
-    ) -> None:
-        self.status_code = status_code
-        self.log_message = log_message
-        self.args = args
-        self.reason = kwargs.get("reason", None)
-        if log_message and not args:
-            self.log_message = log_message.replace("%", "%%")
-
-    def __str__(self) -> str:
-        message = "HTTP %d: %s" % (
-            self.status_code,
-            self.reason or httputil.responses.get(self.status_code, "Unknown"),
-        )
-        if self.log_message:
-            return message + " (" + (self.log_message % self.args) + ")"
-        else:
-            return message
-
-
-class Finish(Exception):
-    """An exception that ends the request without producing an error response.
-
-    When `Finish` is raised in a `RequestHandler`, the request will
-    end (calling `RequestHandler.finish` if it hasn't already been
-    called), but the error-handling methods (including
-    `RequestHandler.write_error`) will not be called.
-
-    If `Finish()` was created with no arguments, the pending response
-    will be sent as-is. If `Finish()` was given an argument, that
-    argument will be passed to `RequestHandler.finish()`.
-
-    This can be a more convenient way to implement custom error pages
-    than overriding ``write_error`` (especially in library code)::
-
-        if self.current_user is None:
-            self.set_status(401)
-            self.set_header('WWW-Authenticate', 'Basic realm="something"')
-            raise Finish()
-
-    .. versionchanged:: 4.3
-       Arguments passed to ``Finish()`` will be passed on to
-       `RequestHandler.finish`.
-    """
-
-    pass
-
-
-class MissingArgumentError(HTTPError):
-    """Exception raised by `RequestHandler.get_argument`.
-
-    This is a subclass of `HTTPError`, so if it is uncaught a 400 response
-    code will be used instead of 500 (and a stack trace will not be logged).
-
-    .. versionadded:: 3.1
-    """
-
-    def __init__(self, arg_name: str) -> None:
-        super(MissingArgumentError, self).__init__(
-            400, "Missing argument %s" % arg_name
-        )
-        self.arg_name = arg_name
-
-
-class ErrorHandler(RequestHandler):
-    """Generates an error response with ``status_code`` for all requests."""
-
-    def initialize(self, status_code: int) -> None:
-        self.set_status(status_code)
-
-    def prepare(self) -> None:
-        raise HTTPError(self._status_code)
-
-    def check_xsrf_cookie(self) -> None:
-        # POSTs to an ErrorHandler don't actually have side effects,
-        # so we don't need to check the xsrf token.  This allows POSTs
-        # to the wrong url to return a 404 instead of 403.
-        pass
-
-
-class RedirectHandler(RequestHandler):
-    """Redirects the client to the given URL for all GET requests.
-
-    You should provide the keyword argument ``url`` to the handler, e.g.::
-
-        application = web.Application([
-            (r"/oldpath", web.RedirectHandler, {"url": "/newpath"}),
-        ])
-
-    `RedirectHandler` supports regular expression substitutions. E.g., to
-    swap the first and second parts of a path while preserving the remainder::
-
-        application = web.Application([
-            (r"/(.*?)/(.*?)/(.*)", web.RedirectHandler, {"url": "/{1}/{0}/{2}"}),
-        ])
-
-    The final URL is formatted with `str.format` and the substrings that match
-    the capturing groups. In the above example, a request to "/a/b/c" would be
-    formatted like::
-
-        str.format("/{1}/{0}/{2}", "a", "b", "c")  # -> "/b/a/c"
-
-    Use Python's :ref:`format string syntax <formatstrings>` to customize how
-    values are substituted.
-
-    .. versionchanged:: 4.5
-       Added support for substitutions into the destination URL.
-
-    .. versionchanged:: 5.0
-       If any query arguments are present, they will be copied to the
-       destination URL.
-    """
-
-    def initialize(self, url: str, permanent: bool = True) -> None:
-        self._url = url
-        self._permanent = permanent
-
-    def get(self, *args: Any) -> None:
-        to_url = self._url.format(*args)
-        if self.request.query_arguments:
-            # TODO: figure out typing for the next line.
-            to_url = httputil.url_concat(
-                to_url,
-                list(httputil.qs_to_qsl(self.request.query_arguments)),  # type: ignore
-            )
-        self.redirect(to_url, permanent=self._permanent)
-
-
-class StaticFileHandler(RequestHandler):
-    """A simple handler that can serve static content from a directory.
-
-    A `StaticFileHandler` is configured automatically if you pass the
-    ``static_path`` keyword argument to `Application`.  This handler
-    can be customized with the ``static_url_prefix``, ``static_handler_class``,
-    and ``static_handler_args`` settings.
-
-    To map an additional path to this handler for a static data directory
-    you would add a line to your application like::
-
-        application = web.Application([
-            (r"/content/(.*)", web.StaticFileHandler, {"path": "/var/www"}),
-        ])
-
-    The handler constructor requires a ``path`` argument, which specifies the
-    local root directory of the content to be served.
-
-    Note that a capture group in the regex is required to parse the value for
-    the ``path`` argument to the get() method (different than the constructor
-    argument above); see `URLSpec` for details.
-
-    To serve a file like ``index.html`` automatically when a directory is
-    requested, set ``static_handler_args=dict(default_filename="index.html")``
-    in your application settings, or add ``default_filename`` as an initializer
-    argument for your ``StaticFileHandler``.
-
-    To maximize the effectiveness of browser caching, this class supports
-    versioned urls (by default using the argument ``?v=``).  If a version
-    is given, we instruct the browser to cache this file indefinitely.
-    `make_static_url` (also available as `RequestHandler.static_url`) can
-    be used to construct a versioned url.
-
-    This handler is intended primarily for use in development and light-duty
-    file serving; for heavy traffic it will be more efficient to use
-    a dedicated static file server (such as nginx or Apache).  We support
-    the HTTP ``Accept-Ranges`` mechanism to return partial content (because
-    some browsers require this functionality to be present to seek in
-    HTML5 audio or video).
-
-    **Subclassing notes**
-
-    This class is designed to be extensible by subclassing, but because
-    of the way static urls are generated with class methods rather than
-    instance methods, the inheritance patterns are somewhat unusual.
-    Be sure to use the ``@classmethod`` decorator when overriding a
-    class method.  Instance methods may use the attributes ``self.path``
-    ``self.absolute_path``, and ``self.modified``.
-
-    Subclasses should only override methods discussed in this section;
-    overriding other methods is error-prone.  Overriding
-    ``StaticFileHandler.get`` is particularly problematic due to the
-    tight coupling with ``compute_etag`` and other methods.
-
-    To change the way static urls are generated (e.g. to match the behavior
-    of another server or CDN), override `make_static_url`, `parse_url_path`,
-    `get_cache_time`, and/or `get_version`.
-
-    To replace all interaction with the filesystem (e.g. to serve
-    static content from a database), override `get_content`,
-    `get_content_size`, `get_modified_time`, `get_absolute_path`, and
-    `validate_absolute_path`.
-
-    .. versionchanged:: 3.1
-       Many of the methods for subclasses were added in Tornado 3.1.
-    """
-
-    CACHE_MAX_AGE = 86400 * 365 * 10  # 10 years
-
-    _static_hashes = {}  # type: Dict[str, Optional[str]]
-    _lock = threading.Lock()  # protects _static_hashes
-
-    def initialize(self, path: str, default_filename: str = None) -> None:
-        self.root = path
-        self.default_filename = default_filename
-
-    @classmethod
-    def reset(cls) -> None:
-        with cls._lock:
-            cls._static_hashes = {}
-
-    def head(self, path: str) -> Awaitable[None]:
-        return self.get(path, include_body=False)
-
-    async def get(self, path: str, include_body: bool = True) -> None:
-        # Set up our path instance variables.
-        self.path = self.parse_url_path(path)
-        del path  # make sure we don't refer to path instead of self.path again
-        absolute_path = self.get_absolute_path(self.root, self.path)
-        self.absolute_path = self.validate_absolute_path(self.root, absolute_path)
-        if self.absolute_path is None:
-            return
-
-        self.modified = self.get_modified_time()
-        self.set_headers()
-
-        if self.should_return_304():
-            self.set_status(304)
-            return
-
-        request_range = None
-        range_header = self.request.headers.get("Range")
-        if range_header:
-            # As per RFC 2616 14.16, if an invalid Range header is specified,
-            # the request will be treated as if the header didn't exist.
-            request_range = httputil._parse_request_range(range_header)
-
-        size = self.get_content_size()
-        if request_range:
-            start, end = request_range
-            if start is not None and start < 0:
-                start += size
-                if start < 0:
-                    start = 0
-            if (
-                start is not None
-                and (start >= size or (end is not None and start >= end))
-            ) or end == 0:
-                # As per RFC 2616 14.35.1, a range is not satisfiable only: if
-                # the first requested byte is equal to or greater than the
-                # content, or when a suffix with length 0 is specified.
-                # https://tools.ietf.org/html/rfc7233#section-2.1
-                # A byte-range-spec is invalid if the last-byte-pos value is present
-                # and less than the first-byte-pos.
-                self.set_status(416)  # Range Not Satisfiable
-                self.set_header("Content-Type", "text/plain")
-                self.set_header("Content-Range", "bytes */%s" % (size,))
-                return
-            if end is not None and end > size:
-                # Clients sometimes blindly use a large range to limit their
-                # download size; cap the endpoint at the actual file size.
-                end = size
-            # Note: only return HTTP 206 if less than the entire range has been
-            # requested. Not only is this semantically correct, but Chrome
-            # refuses to play audio if it gets an HTTP 206 in response to
-            # ``Range: bytes=0-``.
-            if size != (end or size) - (start or 0):
-                self.set_status(206)  # Partial Content
-                self.set_header(
-                    "Content-Range", httputil._get_content_range(start, end, size)
-                )
-        else:
-            start = end = None
-
-        if start is not None and end is not None:
-            content_length = end - start
-        elif end is not None:
-            content_length = end
-        elif start is not None:
-            content_length = size - start
-        else:
-            content_length = size
-        self.set_header("Content-Length", content_length)
-
-        if include_body:
-            content = self.get_content(self.absolute_path, start, end)
-            if isinstance(content, bytes):
-                content = [content]
-            for chunk in content:
-                try:
-                    self.write(chunk)
-                    await self.flush()
-                except iostream.StreamClosedError:
-                    return
-        else:
-            assert self.request.method == "HEAD"
-
-    def compute_etag(self) -> Optional[str]:
-        """Sets the ``Etag`` header based on static url version.
-
-        This allows efficient ``If-None-Match`` checks against cached
-        versions, and sends the correct ``Etag`` for a partial response
-        (i.e. the same ``Etag`` as the full file).
-
-        .. versionadded:: 3.1
-        """
-        assert self.absolute_path is not None
-        version_hash = self._get_cached_version(self.absolute_path)
-        if not version_hash:
-            return None
-        return '"%s"' % (version_hash,)
-
-    def set_headers(self) -> None:
-        """Sets the content and caching headers on the response.
-
-        .. versionadded:: 3.1
-        """
-        self.set_header("Accept-Ranges", "bytes")
-        self.set_etag_header()
-
-        if self.modified is not None:
-            self.set_header("Last-Modified", self.modified)
-
-        content_type = self.get_content_type()
-        if content_type:
-            self.set_header("Content-Type", content_type)
-
-        cache_time = self.get_cache_time(self.path, self.modified, content_type)
-        if cache_time > 0:
-            self.set_header(
-                "Expires",
-                datetime.datetime.utcnow() + datetime.timedelta(seconds=cache_time),
-            )
-            self.set_header("Cache-Control", "max-age=" + str(cache_time))
-
-        self.set_extra_headers(self.path)
-
-    def should_return_304(self) -> bool:
-        """Returns True if the headers indicate that we should return 304.
-
-        .. versionadded:: 3.1
-        """
-        # If client sent If-None-Match, use it, ignore If-Modified-Since
-        if self.request.headers.get("If-None-Match"):
-            return self.check_etag_header()
-
-        # Check the If-Modified-Since, and don't send the result if the
-        # content has not been modified
-        ims_value = self.request.headers.get("If-Modified-Since")
-        if ims_value is not None:
-            date_tuple = email.utils.parsedate(ims_value)
-            if date_tuple is not None:
-                if_since = datetime.datetime(*date_tuple[:6])
-                assert self.modified is not None
-                if if_since >= self.modified:
-                    return True
-
-        return False
-
-    @classmethod
-    def get_absolute_path(cls, root: str, path: str) -> str:
-        """Returns the absolute location of ``path`` relative to ``root``.
-
-        ``root`` is the path configured for this `StaticFileHandler`
-        (in most cases the ``static_path`` `Application` setting).
-
-        This class method may be overridden in subclasses.  By default
-        it returns a filesystem path, but other strings may be used
-        as long as they are unique and understood by the subclass's
-        overridden `get_content`.
-
-        .. versionadded:: 3.1
-        """
-        abspath = os.path.abspath(os.path.join(root, path))
-        return abspath
-
-    def validate_absolute_path(self, root: str, absolute_path: str) -> Optional[str]:
-        """Validate and return the absolute path.
-
-        ``root`` is the configured path for the `StaticFileHandler`,
-        and ``path`` is the result of `get_absolute_path`
-
-        This is an instance method called during request processing,
-        so it may raise `HTTPError` or use methods like
-        `RequestHandler.redirect` (return None after redirecting to
-        halt further processing).  This is where 404 errors for missing files
-        are generated.
-
-        This method may modify the path before returning it, but note that
-        any such modifications will not be understood by `make_static_url`.
-
-        In instance methods, this method's result is available as
-        ``self.absolute_path``.
-
-        .. versionadded:: 3.1
-        """
-        # os.path.abspath strips a trailing /.
-        # We must add it back to `root` so that we only match files
-        # in a directory named `root` instead of files starting with
-        # that prefix.
-        root = os.path.abspath(root)
-        if not root.endswith(os.path.sep):
-            # abspath always removes a trailing slash, except when
-            # root is '/'. This is an unusual case, but several projects
-            # have independently discovered this technique to disable
-            # Tornado's path validation and (hopefully) do their own,
-            # so we need to support it.
-            root += os.path.sep
-        # The trailing slash also needs to be temporarily added back
-        # the requested path so a request to root/ will match.
-        if not (absolute_path + os.path.sep).startswith(root):
-            raise HTTPError(403, "%s is not in root static directory", self.path)
-        if os.path.isdir(absolute_path) and self.default_filename is not None:
-            # need to look at the request.path here for when path is empty
-            # but there is some prefix to the path that was already
-            # trimmed by the routing
-            if not self.request.path.endswith("/"):
-                self.redirect(self.request.path + "/", permanent=True)
-                return None
-            absolute_path = os.path.join(absolute_path, self.default_filename)
-        if not os.path.exists(absolute_path):
-            raise HTTPError(404)
-        if not os.path.isfile(absolute_path):
-            raise HTTPError(403, "%s is not a file", self.path)
-        return absolute_path
-
-    @classmethod
-    def get_content(
-        cls, abspath: str, start: int = None, end: int = None
-    ) -> Generator[bytes, None, None]:
-        """Retrieve the content of the requested resource which is located
-        at the given absolute path.
-
-        This class method may be overridden by subclasses.  Note that its
-        signature is different from other overridable class methods
-        (no ``settings`` argument); this is deliberate to ensure that
-        ``abspath`` is able to stand on its own as a cache key.
-
-        This method should either return a byte string or an iterator
-        of byte strings.  The latter is preferred for large files
-        as it helps reduce memory fragmentation.
-
-        .. versionadded:: 3.1
-        """
-        with open(abspath, "rb") as file:
-            if start is not None:
-                file.seek(start)
-            if end is not None:
-                remaining = end - (start or 0)  # type: Optional[int]
-            else:
-                remaining = None
-            while True:
-                chunk_size = 64 * 1024
-                if remaining is not None and remaining < chunk_size:
-                    chunk_size = remaining
-                chunk = file.read(chunk_size)
-                if chunk:
-                    if remaining is not None:
-                        remaining -= len(chunk)
-                    yield chunk
-                else:
-                    if remaining is not None:
-                        assert remaining == 0
-                    return
-
-    @classmethod
-    def get_content_version(cls, abspath: str) -> str:
-        """Returns a version string for the resource at the given path.
-
-        This class method may be overridden by subclasses.  The
-        default implementation is a hash of the file's contents.
-
-        .. versionadded:: 3.1
-        """
-        data = cls.get_content(abspath)
-        hasher = hashlib.md5()
-        if isinstance(data, bytes):
-            hasher.update(data)
-        else:
-            for chunk in data:
-                hasher.update(chunk)
-        return hasher.hexdigest()
-
-    def _stat(self) -> os.stat_result:
-        assert self.absolute_path is not None
-        if not hasattr(self, "_stat_result"):
-            self._stat_result = os.stat(self.absolute_path)
-        return self._stat_result
-
-    def get_content_size(self) -> int:
-        """Retrieve the total size of the resource at the given path.
-
-        This method may be overridden by subclasses.
-
-        .. versionadded:: 3.1
-
-        .. versionchanged:: 4.0
-           This method is now always called, instead of only when
-           partial results are requested.
-        """
-        stat_result = self._stat()
-        return stat_result.st_size
-
-    def get_modified_time(self) -> Optional[datetime.datetime]:
-        """Returns the time that ``self.absolute_path`` was last modified.
-
-        May be overridden in subclasses.  Should return a `~datetime.datetime`
-        object or None.
-
-        .. versionadded:: 3.1
-        """
-        stat_result = self._stat()
-        # NOTE: Historically, this used stat_result[stat.ST_MTIME],
-        # which truncates the fractional portion of the timestamp. It
-        # was changed from that form to stat_result.st_mtime to
-        # satisfy mypy (which disallows the bracket operator), but the
-        # latter form returns a float instead of an int. For
-        # consistency with the past (and because we have a unit test
-        # that relies on this), we truncate the float here, although
-        # I'm not sure that's the right thing to do.
-        modified = datetime.datetime.utcfromtimestamp(int(stat_result.st_mtime))
-        return modified
-
-    def get_content_type(self) -> str:
-        """Returns the ``Content-Type`` header to be used for this request.
-
-        .. versionadded:: 3.1
-        """
-        assert self.absolute_path is not None
-        mime_type, encoding = mimetypes.guess_type(self.absolute_path)
-        # per RFC 6713, use the appropriate type for a gzip compressed file
-        if encoding == "gzip":
-            return "application/gzip"
-        # As of 2015-07-21 there is no bzip2 encoding defined at
-        # http://www.iana.org/assignments/media-types/media-types.xhtml
-        # So for that (and any other encoding), use octet-stream.
-        elif encoding is not None:
-            return "application/octet-stream"
-        elif mime_type is not None:
-            return mime_type
-        # if mime_type not detected, use application/octet-stream
-        else:
-            return "application/octet-stream"
-
-    def set_extra_headers(self, path: str) -> None:
-        """For subclass to add extra headers to the response"""
-        pass
-
-    def get_cache_time(
-        self, path: str, modified: Optional[datetime.datetime], mime_type: str
-    ) -> int:
-        """Override to customize cache control behavior.
-
-        Return a positive number of seconds to make the result
-        cacheable for that amount of time or 0 to mark resource as
-        cacheable for an unspecified amount of time (subject to
-        browser heuristics).
-
-        By default returns cache expiry of 10 years for resources requested
-        with ``v`` argument.
-        """
-        return self.CACHE_MAX_AGE if "v" in self.request.arguments else 0
-
-    @classmethod
-    def make_static_url(
-        cls, settings: Dict[str, Any], path: str, include_version: bool = True
-    ) -> str:
-        """Constructs a versioned url for the given path.
-
-        This method may be overridden in subclasses (but note that it
-        is a class method rather than an instance method).  Subclasses
-        are only required to implement the signature
-        ``make_static_url(cls, settings, path)``; other keyword
-        arguments may be passed through `~RequestHandler.static_url`
-        but are not standard.
-
-        ``settings`` is the `Application.settings` dictionary.  ``path``
-        is the static path being requested.  The url returned should be
-        relative to the current host.
-
-        ``include_version`` determines whether the generated URL should
-        include the query string containing the version hash of the
-        file corresponding to the given ``path``.
-
-        """
-        url = settings.get("static_url_prefix", "/static/") + path
-        if not include_version:
-            return url
-
-        version_hash = cls.get_version(settings, path)
-        if not version_hash:
-            return url
-
-        return "%s?v=%s" % (url, version_hash)
-
-    def parse_url_path(self, url_path: str) -> str:
-        """Converts a static URL path into a filesystem path.
-
-        ``url_path`` is the path component of the URL with
-        ``static_url_prefix`` removed.  The return value should be
-        filesystem path relative to ``static_path``.
-
-        This is the inverse of `make_static_url`.
-        """
-        if os.path.sep != "/":
-            url_path = url_path.replace("/", os.path.sep)
-        return url_path
-
-    @classmethod
-    def get_version(cls, settings: Dict[str, Any], path: str) -> Optional[str]:
-        """Generate the version string to be used in static URLs.
-
-        ``settings`` is the `Application.settings` dictionary and ``path``
-        is the relative location of the requested asset on the filesystem.
-        The returned value should be a string, or ``None`` if no version
-        could be determined.
-
-        .. versionchanged:: 3.1
-           This method was previously recommended for subclasses to override;
-           `get_content_version` is now preferred as it allows the base
-           class to handle caching of the result.
-        """
-        abs_path = cls.get_absolute_path(settings["static_path"], path)
-        return cls._get_cached_version(abs_path)
-
-    @classmethod
-    def _get_cached_version(cls, abs_path: str) -> Optional[str]:
-        with cls._lock:
-            hashes = cls._static_hashes
-            if abs_path not in hashes:
-                try:
-                    hashes[abs_path] = cls.get_content_version(abs_path)
-                except Exception:
-                    gen_log.error("Could not open static file %r", abs_path)
-                    hashes[abs_path] = None
-            hsh = hashes.get(abs_path)
-            if hsh:
-                return hsh
-        return None
-
-
-class FallbackHandler(RequestHandler):
-    """A `RequestHandler` that wraps another HTTP server callback.
-
-    The fallback is a callable object that accepts an
-    `~.httputil.HTTPServerRequest`, such as an `Application` or
-    `tornado.wsgi.WSGIContainer`.  This is most useful to use both
-    Tornado ``RequestHandlers`` and WSGI in the same server.  Typical
-    usage::
-
-        wsgi_app = tornado.wsgi.WSGIContainer(
-            django.core.handlers.wsgi.WSGIHandler())
-        application = tornado.web.Application([
-            (r"/foo", FooHandler),
-            (r".*", FallbackHandler, dict(fallback=wsgi_app),
-        ])
-    """
-
-    def initialize(
-        self, fallback: Callable[[httputil.HTTPServerRequest], None]
-    ) -> None:
-        self.fallback = fallback
-
-    def prepare(self) -> None:
-        self.fallback(self.request)
-        self._finished = True
-        self.on_finish()
-
-
-class OutputTransform(object):
-    """A transform modifies the result of an HTTP request (e.g., GZip encoding)
-
-    Applications are not expected to create their own OutputTransforms
-    or interact with them directly; the framework chooses which transforms
-    (if any) to apply.
-    """
-
-    def __init__(self, request: httputil.HTTPServerRequest) -> None:
-        pass
-
-    def transform_first_chunk(
-        self,
-        status_code: int,
-        headers: httputil.HTTPHeaders,
-        chunk: bytes,
-        finishing: bool,
-    ) -> Tuple[int, httputil.HTTPHeaders, bytes]:
-        return status_code, headers, chunk
-
-    def transform_chunk(self, chunk: bytes, finishing: bool) -> bytes:
-        return chunk
-
-
-class GZipContentEncoding(OutputTransform):
-    """Applies the gzip content encoding to the response.
-
-    See http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.11
-
-    .. versionchanged:: 4.0
-        Now compresses all mime types beginning with ``text/``, instead
-        of just a whitelist. (the whitelist is still used for certain
-        non-text mime types).
-    """
-
-    # Whitelist of compressible mime types (in addition to any types
-    # beginning with "text/").
-    CONTENT_TYPES = set(
-        [
-            "application/javascript",
-            "application/x-javascript",
-            "application/xml",
-            "application/atom+xml",
-            "application/json",
-            "application/xhtml+xml",
-            "image/svg+xml",
-        ]
-    )
-    # Python's GzipFile defaults to level 9, while most other gzip
-    # tools (including gzip itself) default to 6, which is probably a
-    # better CPU/size tradeoff.
-    GZIP_LEVEL = 6
-    # Responses that are too short are unlikely to benefit from gzipping
-    # after considering the "Content-Encoding: gzip" header and the header
-    # inside the gzip encoding.
-    # Note that responses written in multiple chunks will be compressed
-    # regardless of size.
-    MIN_LENGTH = 1024
-
-    def __init__(self, request: httputil.HTTPServerRequest) -> None:
-        self._gzipping = "gzip" in request.headers.get("Accept-Encoding", "")
-
-    def _compressible_type(self, ctype: str) -> bool:
-        return ctype.startswith("text/") or ctype in self.CONTENT_TYPES
-
-    def transform_first_chunk(
-        self,
-        status_code: int,
-        headers: httputil.HTTPHeaders,
-        chunk: bytes,
-        finishing: bool,
-    ) -> Tuple[int, httputil.HTTPHeaders, bytes]:
-        # TODO: can/should this type be inherited from the superclass?
-        if "Vary" in headers:
-            headers["Vary"] += ", Accept-Encoding"
-        else:
-            headers["Vary"] = "Accept-Encoding"
-        if self._gzipping:
-            ctype = _unicode(headers.get("Content-Type", "")).split(";")[0]
-            self._gzipping = (
-                self._compressible_type(ctype)
-                and (not finishing or len(chunk) >= self.MIN_LENGTH)
-                and ("Content-Encoding" not in headers)
-            )
-        if self._gzipping:
-            headers["Content-Encoding"] = "gzip"
-            self._gzip_value = BytesIO()
-            self._gzip_file = gzip.GzipFile(
-                mode="w", fileobj=self._gzip_value, compresslevel=self.GZIP_LEVEL
-            )
-            chunk = self.transform_chunk(chunk, finishing)
-            if "Content-Length" in headers:
-                # The original content length is no longer correct.
-                # If this is the last (and only) chunk, we can set the new
-                # content-length; otherwise we remove it and fall back to
-                # chunked encoding.
-                if finishing:
-                    headers["Content-Length"] = str(len(chunk))
-                else:
-                    del headers["Content-Length"]
-        return status_code, headers, chunk
-
-    def transform_chunk(self, chunk: bytes, finishing: bool) -> bytes:
-        if self._gzipping:
-            self._gzip_file.write(chunk)
-            if finishing:
-                self._gzip_file.close()
-            else:
-                self._gzip_file.flush()
-            chunk = self._gzip_value.getvalue()
-            self._gzip_value.truncate(0)
-            self._gzip_value.seek(0)
-        return chunk
-
-
-def authenticated(
-    method: Callable[..., Optional[Awaitable[None]]]
-) -> Callable[..., Optional[Awaitable[None]]]:
-    """Decorate methods with this to require that the user be logged in.
-
-    If the user is not logged in, they will be redirected to the configured
-    `login url <RequestHandler.get_login_url>`.
-
-    If you configure a login url with a query parameter, Tornado will
-    assume you know what you're doing and use it as-is.  If not, it
-    will add a `next` parameter so the login page knows where to send
-    you once you're logged in.
-    """
-
-    @functools.wraps(method)
-    def wrapper(  # type: ignore
-        self: RequestHandler, *args, **kwargs
-    ) -> Optional[Awaitable[None]]:
-        if not self.current_user:
-            if self.request.method in ("GET", "HEAD"):
-                url = self.get_login_url()
-                if "?" not in url:
-                    if urllib.parse.urlsplit(url).scheme:
-                        # if login url is absolute, make next absolute too
-                        next_url = self.request.full_url()
-                    else:
-                        assert self.request.uri is not None
-                        next_url = self.request.uri
-                    url += "?" + urlencode(dict(next=next_url))
-                self.redirect(url)
-                return None
-            raise HTTPError(403)
-        return method(self, *args, **kwargs)
-
-    return wrapper
-
-
-class UIModule(object):
-    """A re-usable, modular UI unit on a page.
-
-    UI modules often execute additional queries, and they can include
-    additional CSS and JavaScript that will be included in the output
-    page, which is automatically inserted on page render.
-
-    Subclasses of UIModule must override the `render` method.
-    """
-
-    def __init__(self, handler: RequestHandler) -> None:
-        self.handler = handler
-        self.request = handler.request
-        self.ui = handler.ui
-        self.locale = handler.locale
-
-    @property
-    def current_user(self) -> Any:
-        return self.handler.current_user
-
-    def render(self, *args: Any, **kwargs: Any) -> str:
-        """Override in subclasses to return this module's output."""
-        raise NotImplementedError()
-
-    def embedded_javascript(self) -> Optional[str]:
-        """Override to return a JavaScript string
-        to be embedded in the page."""
-        return None
-
-    def javascript_files(self) -> Optional[Iterable[str]]:
-        """Override to return a list of JavaScript files needed by this module.
-
-        If the return values are relative paths, they will be passed to
-        `RequestHandler.static_url`; otherwise they will be used as-is.
-        """
-        return None
-
-    def embedded_css(self) -> Optional[str]:
-        """Override to return a CSS string
-        that will be embedded in the page."""
-        return None
-
-    def css_files(self) -> Optional[Iterable[str]]:
-        """Override to returns a list of CSS files required by this module.
-
-        If the return values are relative paths, they will be passed to
-        `RequestHandler.static_url`; otherwise they will be used as-is.
-        """
-        return None
-
-    def html_head(self) -> Optional[str]:
-        """Override to return an HTML string that will be put in the <head/>
-        element.
-        """
-        return None
-
-    def html_body(self) -> Optional[str]:
-        """Override to return an HTML string that will be put at the end of
-        the <body/> element.
-        """
-        return None
-
-    def render_string(self, path: str, **kwargs: Any) -> bytes:
-        """Renders a template and returns it as a string."""
-        return self.handler.render_string(path, **kwargs)
-
-
-class _linkify(UIModule):
-    def render(self, text: str, **kwargs: Any) -> str:  # type: ignore
-        return escape.linkify(text, **kwargs)
-
-
-class _xsrf_form_html(UIModule):
-    def render(self) -> str:  # type: ignore
-        return self.handler.xsrf_form_html()
-
-
-class TemplateModule(UIModule):
-    """UIModule that simply renders the given template.
-
-    {% module Template("foo.html") %} is similar to {% include "foo.html" %},
-    but the module version gets its own namespace (with kwargs passed to
-    Template()) instead of inheriting the outer template's namespace.
-
-    Templates rendered through this module also get access to UIModule's
-    automatic javascript/css features.  Simply call set_resources
-    inside the template and give it keyword arguments corresponding to
-    the methods on UIModule: {{ set_resources(js_files=static_url("my.js")) }}
-    Note that these resources are output once per template file, not once
-    per instantiation of the template, so they must not depend on
-    any arguments to the template.
-    """
-
-    def __init__(self, handler: RequestHandler) -> None:
-        super(TemplateModule, self).__init__(handler)
-        # keep resources in both a list and a dict to preserve order
-        self._resource_list = []  # type: List[Dict[str, Any]]
-        self._resource_dict = {}  # type: Dict[str, Dict[str, Any]]
-
-    def render(self, path: str, **kwargs: Any) -> bytes:  # type: ignore
-        def set_resources(**kwargs) -> str:  # type: ignore
-            if path not in self._resource_dict:
-                self._resource_list.append(kwargs)
-                self._resource_dict[path] = kwargs
-            else:
-                if self._resource_dict[path] != kwargs:
-                    raise ValueError(
-                        "set_resources called with different "
-                        "resources for the same template"
-                    )
-            return ""
-
-        return self.render_string(path, set_resources=set_resources, **kwargs)
-
-    def _get_resources(self, key: str) -> Iterable[str]:
-        return (r[key] for r in self._resource_list if key in r)
-
-    def embedded_javascript(self) -> str:
-        return "\n".join(self._get_resources("embedded_javascript"))
-
-    def javascript_files(self) -> Iterable[str]:
-        result = []
-        for f in self._get_resources("javascript_files"):
-            if isinstance(f, (unicode_type, bytes)):
-                result.append(f)
-            else:
-                result.extend(f)
-        return result
-
-    def embedded_css(self) -> str:
-        return "\n".join(self._get_resources("embedded_css"))
-
-    def css_files(self) -> Iterable[str]:
-        result = []
-        for f in self._get_resources("css_files"):
-            if isinstance(f, (unicode_type, bytes)):
-                result.append(f)
-            else:
-                result.extend(f)
-        return result
-
-    def html_head(self) -> str:
-        return "".join(self._get_resources("html_head"))
-
-    def html_body(self) -> str:
-        return "".join(self._get_resources("html_body"))
-
-
-class _UIModuleNamespace(object):
-    """Lazy namespace which creates UIModule proxies bound to a handler."""
-
-    def __init__(
-        self, handler: RequestHandler, ui_modules: Dict[str, Type[UIModule]]
-    ) -> None:
-        self.handler = handler
-        self.ui_modules = ui_modules
-
-    def __getitem__(self, key: str) -> Callable[..., str]:
-        return self.handler._ui_module(key, self.ui_modules[key])
-
-    def __getattr__(self, key: str) -> Callable[..., str]:
-        try:
-            return self[key]
-        except KeyError as e:
-            raise AttributeError(str(e))
-
-
-def create_signed_value(
-    secret: _CookieSecretTypes,
-    name: str,
-    value: Union[str, bytes],
-    version: int = None,
-    clock: Callable[[], float] = None,
-    key_version: int = None,
-) -> bytes:
-    if version is None:
-        version = DEFAULT_SIGNED_VALUE_VERSION
-    if clock is None:
-        clock = time.time
-
-    timestamp = utf8(str(int(clock())))
-    value = base64.b64encode(utf8(value))
-    if version == 1:
-        assert not isinstance(secret, dict)
-        signature = _create_signature_v1(secret, name, value, timestamp)
-        value = b"|".join([value, timestamp, signature])
-        return value
-    elif version == 2:
-        # The v2 format consists of a version number and a series of
-        # length-prefixed fields "%d:%s", the last of which is a
-        # signature, all separated by pipes.  All numbers are in
-        # decimal format with no leading zeros.  The signature is an
-        # HMAC-SHA256 of the whole string up to that point, including
-        # the final pipe.
-        #
-        # The fields are:
-        # - format version (i.e. 2; no length prefix)
-        # - key version (integer, default is 0)
-        # - timestamp (integer seconds since epoch)
-        # - name (not encoded; assumed to be ~alphanumeric)
-        # - value (base64-encoded)
-        # - signature (hex-encoded; no length prefix)
-        def format_field(s: Union[str, bytes]) -> bytes:
-            return utf8("%d:" % len(s)) + utf8(s)
-
-        to_sign = b"|".join(
-            [
-                b"2",
-                format_field(str(key_version or 0)),
-                format_field(timestamp),
-                format_field(name),
-                format_field(value),
-                b"",
-            ]
-        )
-
-        if isinstance(secret, dict):
-            assert (
-                key_version is not None
-            ), "Key version must be set when sign key dict is used"
-            assert version >= 2, "Version must be at least 2 for key version support"
-            secret = secret[key_version]
-
-        signature = _create_signature_v2(secret, to_sign)
-        return to_sign + signature
-    else:
-        raise ValueError("Unsupported version %d" % version)
-
-
-# A leading version number in decimal
-# with no leading zeros, followed by a pipe.
-_signed_value_version_re = re.compile(br"^([1-9][0-9]*)\|(.*)$")
-
-
-def _get_version(value: bytes) -> int:
-    # Figures out what version value is.  Version 1 did not include an
-    # explicit version field and started with arbitrary base64 data,
-    # which makes this tricky.
-    m = _signed_value_version_re.match(value)
-    if m is None:
-        version = 1
-    else:
-        try:
-            version = int(m.group(1))
-            if version > 999:
-                # Certain payloads from the version-less v1 format may
-                # be parsed as valid integers.  Due to base64 padding
-                # restrictions, this can only happen for numbers whose
-                # length is a multiple of 4, so we can treat all
-                # numbers up to 999 as versions, and for the rest we
-                # fall back to v1 format.
-                version = 1
-        except ValueError:
-            version = 1
-    return version
-
-
-def decode_signed_value(
-    secret: _CookieSecretTypes,
-    name: str,
-    value: Union[None, str, bytes],
-    max_age_days: int = 31,
-    clock: Callable[[], float] = None,
-    min_version: int = None,
-) -> Optional[bytes]:
-    if clock is None:
-        clock = time.time
-    if min_version is None:
-        min_version = DEFAULT_SIGNED_VALUE_MIN_VERSION
-    if min_version > 2:
-        raise ValueError("Unsupported min_version %d" % min_version)
-    if not value:
-        return None
-
-    value = utf8(value)
-    version = _get_version(value)
-
-    if version < min_version:
-        return None
-    if version == 1:
-        assert not isinstance(secret, dict)
-        return _decode_signed_value_v1(secret, name, value, max_age_days, clock)
-    elif version == 2:
-        return _decode_signed_value_v2(secret, name, value, max_age_days, clock)
-    else:
-        return None
-
-
-def _decode_signed_value_v1(
-    secret: Union[str, bytes],
-    name: str,
-    value: bytes,
-    max_age_days: int,
-    clock: Callable[[], float],
-) -> Optional[bytes]:
-    parts = utf8(value).split(b"|")
-    if len(parts) != 3:
-        return None
-    signature = _create_signature_v1(secret, name, parts[0], parts[1])
-    if not hmac.compare_digest(parts[2], signature):
-        gen_log.warning("Invalid cookie signature %r", value)
-        return None
-    timestamp = int(parts[1])
-    if timestamp < clock() - max_age_days * 86400:
-        gen_log.warning("Expired cookie %r", value)
-        return None
-    if timestamp > clock() + 31 * 86400:
-        # _cookie_signature does not hash a delimiter between the
-        # parts of the cookie, so an attacker could transfer trailing
-        # digits from the payload to the timestamp without altering the
-        # signature.  For backwards compatibility, sanity-check timestamp
-        # here instead of modifying _cookie_signature.
-        gen_log.warning("Cookie timestamp in future; possible tampering %r", value)
-        return None
-    if parts[1].startswith(b"0"):
-        gen_log.warning("Tampered cookie %r", value)
-        return None
-    try:
-        return base64.b64decode(parts[0])
-    except Exception:
-        return None
-
-
-def _decode_fields_v2(value: bytes) -> Tuple[int, bytes, bytes, bytes, bytes]:
-    def _consume_field(s: bytes) -> Tuple[bytes, bytes]:
-        length, _, rest = s.partition(b":")
-        n = int(length)
-        field_value = rest[:n]
-        # In python 3, indexing bytes returns small integers; we must
-        # use a slice to get a byte string as in python 2.
-        if rest[n : n + 1] != b"|":
-            raise ValueError("malformed v2 signed value field")
-        rest = rest[n + 1 :]
-        return field_value, rest
-
-    rest = value[2:]  # remove version number
-    key_version, rest = _consume_field(rest)
-    timestamp, rest = _consume_field(rest)
-    name_field, rest = _consume_field(rest)
-    value_field, passed_sig = _consume_field(rest)
-    return int(key_version), timestamp, name_field, value_field, passed_sig
-
-
-def _decode_signed_value_v2(
-    secret: _CookieSecretTypes,
-    name: str,
-    value: bytes,
-    max_age_days: int,
-    clock: Callable[[], float],
-) -> Optional[bytes]:
-    try:
-        key_version, timestamp_bytes, name_field, value_field, passed_sig = _decode_fields_v2(
-            value
-        )
-    except ValueError:
-        return None
-    signed_string = value[: -len(passed_sig)]
-
-    if isinstance(secret, dict):
-        try:
-            secret = secret[key_version]
-        except KeyError:
-            return None
-
-    expected_sig = _create_signature_v2(secret, signed_string)
-    if not hmac.compare_digest(passed_sig, expected_sig):
-        return None
-    if name_field != utf8(name):
-        return None
-    timestamp = int(timestamp_bytes)
-    if timestamp < clock() - max_age_days * 86400:
-        # The signature has expired.
-        return None
-    try:
-        return base64.b64decode(value_field)
-    except Exception:
-        return None
-
-
-def get_signature_key_version(value: Union[str, bytes]) -> Optional[int]:
-    value = utf8(value)
-    version = _get_version(value)
-    if version < 2:
-        return None
-    try:
-        key_version, _, _, _, _ = _decode_fields_v2(value)
-    except ValueError:
-        return None
-
-    return key_version
-
-
-def _create_signature_v1(secret: Union[str, bytes], *parts: Union[str, bytes]) -> bytes:
-    hash = hmac.new(utf8(secret), digestmod=hashlib.sha1)
-    for part in parts:
-        hash.update(utf8(part))
-    return utf8(hash.hexdigest())
-
-
-def _create_signature_v2(secret: Union[str, bytes], s: bytes) -> bytes:
-    hash = hmac.new(utf8(secret), digestmod=hashlib.sha256)
-    hash.update(utf8(s))
-    return utf8(hash.hexdigest())
-
-
-def is_absolute(path: str) -> bool:
-    return any(path.startswith(x) for x in ["/", "http:", "https:"])
diff --git a/venv/lib/python3.7/site-packages/tornado/websocket.py b/venv/lib/python3.7/site-packages/tornado/websocket.py
deleted file mode 100644
index d991fee..0000000
--- a/venv/lib/python3.7/site-packages/tornado/websocket.py
+++ /dev/null
@@ -1,1663 +0,0 @@
-"""Implementation of the WebSocket protocol.
-
-`WebSockets <http://dev.w3.org/html5/websockets/>`_ allow for bidirectional
-communication between the browser and server.
-
-WebSockets are supported in the current versions of all major browsers,
-although older versions that do not support WebSockets are still in use
-(refer to http://caniuse.com/websockets for details).
-
-This module implements the final version of the WebSocket protocol as
-defined in `RFC 6455 <http://tools.ietf.org/html/rfc6455>`_.  Certain
-browser versions (notably Safari 5.x) implemented an earlier draft of
-the protocol (known as "draft 76") and are not compatible with this module.
-
-.. versionchanged:: 4.0
-   Removed support for the draft 76 protocol version.
-"""
-
-import abc
-import asyncio
-import base64
-import hashlib
-import os
-import sys
-import struct
-import tornado.escape
-import tornado.web
-from urllib.parse import urlparse
-import zlib
-
-from tornado.concurrent import Future, future_set_result_unless_cancelled
-from tornado.escape import utf8, native_str, to_unicode
-from tornado import gen, httpclient, httputil
-from tornado.ioloop import IOLoop, PeriodicCallback
-from tornado.iostream import StreamClosedError, IOStream
-from tornado.log import gen_log, app_log
-from tornado import simple_httpclient
-from tornado.queues import Queue
-from tornado.tcpclient import TCPClient
-from tornado.util import _websocket_mask
-
-from typing import (
-    TYPE_CHECKING,
-    cast,
-    Any,
-    Optional,
-    Dict,
-    Union,
-    List,
-    Awaitable,
-    Callable,
-    Tuple,
-    Type,
-)
-from types import TracebackType
-
-if TYPE_CHECKING:
-    from typing_extensions import Protocol
-
-    # The zlib compressor types aren't actually exposed anywhere
-    # publicly, so declare protocols for the portions we use.
-    class _Compressor(Protocol):
-        def compress(self, data: bytes) -> bytes:
-            pass
-
-        def flush(self, mode: int) -> bytes:
-            pass
-
-    class _Decompressor(Protocol):
-        unconsumed_tail = b""  # type: bytes
-
-        def decompress(self, data: bytes, max_length: int) -> bytes:
-            pass
-
-    class _WebSocketDelegate(Protocol):
-        # The common base interface implemented by WebSocketHandler on
-        # the server side and WebSocketClientConnection on the client
-        # side.
-        def on_ws_connection_close(
-            self, close_code: int = None, close_reason: str = None
-        ) -> None:
-            pass
-
-        def on_message(self, message: Union[str, bytes]) -> Optional["Awaitable[None]"]:
-            pass
-
-        def on_ping(self, data: bytes) -> None:
-            pass
-
-        def on_pong(self, data: bytes) -> None:
-            pass
-
-        def log_exception(
-            self,
-            typ: Optional[Type[BaseException]],
-            value: Optional[BaseException],
-            tb: Optional[TracebackType],
-        ) -> None:
-            pass
-
-
-_default_max_message_size = 10 * 1024 * 1024
-
-
-class WebSocketError(Exception):
-    pass
-
-
-class WebSocketClosedError(WebSocketError):
-    """Raised by operations on a closed connection.
-
-    .. versionadded:: 3.2
-    """
-
-    pass
-
-
-class _DecompressTooLargeError(Exception):
-    pass
-
-
-class _WebSocketParams(object):
-    def __init__(
-        self,
-        ping_interval: float = None,
-        ping_timeout: float = None,
-        max_message_size: int = _default_max_message_size,
-        compression_options: Dict[str, Any] = None,
-    ) -> None:
-        self.ping_interval = ping_interval
-        self.ping_timeout = ping_timeout
-        self.max_message_size = max_message_size
-        self.compression_options = compression_options
-
-
-class WebSocketHandler(tornado.web.RequestHandler):
-    """Subclass this class to create a basic WebSocket handler.
-
-    Override `on_message` to handle incoming messages, and use
-    `write_message` to send messages to the client. You can also
-    override `open` and `on_close` to handle opened and closed
-    connections.
-
-    Custom upgrade response headers can be sent by overriding
-    `~tornado.web.RequestHandler.set_default_headers` or
-    `~tornado.web.RequestHandler.prepare`.
-
-    See http://dev.w3.org/html5/websockets/ for details on the
-    JavaScript interface.  The protocol is specified at
-    http://tools.ietf.org/html/rfc6455.
-
-    Here is an example WebSocket handler that echos back all received messages
-    back to the client:
-
-    .. testcode::
-
-      class EchoWebSocket(tornado.websocket.WebSocketHandler):
-          def open(self):
-              print("WebSocket opened")
-
-          def on_message(self, message):
-              self.write_message(u"You said: " + message)
-
-          def on_close(self):
-              print("WebSocket closed")
-
-    .. testoutput::
-       :hide:
-
-    WebSockets are not standard HTTP connections. The "handshake" is
-    HTTP, but after the handshake, the protocol is
-    message-based. Consequently, most of the Tornado HTTP facilities
-    are not available in handlers of this type. The only communication
-    methods available to you are `write_message()`, `ping()`, and
-    `close()`. Likewise, your request handler class should implement
-    `open()` method rather than ``get()`` or ``post()``.
-
-    If you map the handler above to ``/websocket`` in your application, you can
-    invoke it in JavaScript with::
-
-      var ws = new WebSocket("ws://localhost:8888/websocket");
-      ws.onopen = function() {
-         ws.send("Hello, world");
-      };
-      ws.onmessage = function (evt) {
-         alert(evt.data);
-      };
-
-    This script pops up an alert box that says "You said: Hello, world".
-
-    Web browsers allow any site to open a websocket connection to any other,
-    instead of using the same-origin policy that governs other network
-    access from javascript.  This can be surprising and is a potential
-    security hole, so since Tornado 4.0 `WebSocketHandler` requires
-    applications that wish to receive cross-origin websockets to opt in
-    by overriding the `~WebSocketHandler.check_origin` method (see that
-    method's docs for details).  Failure to do so is the most likely
-    cause of 403 errors when making a websocket connection.
-
-    When using a secure websocket connection (``wss://``) with a self-signed
-    certificate, the connection from a browser may fail because it wants
-    to show the "accept this certificate" dialog but has nowhere to show it.
-    You must first visit a regular HTML page using the same certificate
-    to accept it before the websocket connection will succeed.
-
-    If the application setting ``websocket_ping_interval`` has a non-zero
-    value, a ping will be sent periodically, and the connection will be
-    closed if a response is not received before the ``websocket_ping_timeout``.
-
-    Messages larger than the ``websocket_max_message_size`` application setting
-    (default 10MiB) will not be accepted.
-
-    .. versionchanged:: 4.5
-       Added ``websocket_ping_interval``, ``websocket_ping_timeout``, and
-       ``websocket_max_message_size``.
-    """
-
-    def __init__(
-        self,
-        application: tornado.web.Application,
-        request: httputil.HTTPServerRequest,
-        **kwargs: Any
-    ) -> None:
-        super(WebSocketHandler, self).__init__(application, request, **kwargs)
-        self.ws_connection = None  # type: Optional[WebSocketProtocol]
-        self.close_code = None  # type: Optional[int]
-        self.close_reason = None  # type: Optional[str]
-        self.stream = None  # type: Optional[IOStream]
-        self._on_close_called = False
-
-    async def get(self, *args: Any, **kwargs: Any) -> None:
-        self.open_args = args
-        self.open_kwargs = kwargs
-
-        # Upgrade header should be present and should be equal to WebSocket
-        if self.request.headers.get("Upgrade", "").lower() != "websocket":
-            self.set_status(400)
-            log_msg = 'Can "Upgrade" only to "WebSocket".'
-            self.finish(log_msg)
-            gen_log.debug(log_msg)
-            return
-
-        # Connection header should be upgrade.
-        # Some proxy servers/load balancers
-        # might mess with it.
-        headers = self.request.headers
-        connection = map(
-            lambda s: s.strip().lower(), headers.get("Connection", "").split(",")
-        )
-        if "upgrade" not in connection:
-            self.set_status(400)
-            log_msg = '"Connection" must be "Upgrade".'
-            self.finish(log_msg)
-            gen_log.debug(log_msg)
-            return
-
-        # Handle WebSocket Origin naming convention differences
-        # The difference between version 8 and 13 is that in 8 the
-        # client sends a "Sec-Websocket-Origin" header and in 13 it's
-        # simply "Origin".
-        if "Origin" in self.request.headers:
-            origin = self.request.headers.get("Origin")
-        else:
-            origin = self.request.headers.get("Sec-Websocket-Origin", None)
-
-        # If there was an origin header, check to make sure it matches
-        # according to check_origin. When the origin is None, we assume it
-        # did not come from a browser and that it can be passed on.
-        if origin is not None and not self.check_origin(origin):
-            self.set_status(403)
-            log_msg = "Cross origin websockets not allowed"
-            self.finish(log_msg)
-            gen_log.debug(log_msg)
-            return
-
-        self.ws_connection = self.get_websocket_protocol()
-        if self.ws_connection:
-            await self.ws_connection.accept_connection(self)
-        else:
-            self.set_status(426, "Upgrade Required")
-            self.set_header("Sec-WebSocket-Version", "7, 8, 13")
-
-    stream = None
-
-    @property
-    def ping_interval(self) -> Optional[float]:
-        """The interval for websocket keep-alive pings.
-
-        Set websocket_ping_interval = 0 to disable pings.
-        """
-        return self.settings.get("websocket_ping_interval", None)
-
-    @property
-    def ping_timeout(self) -> Optional[float]:
-        """If no ping is received in this many seconds,
-        close the websocket connection (VPNs, etc. can fail to cleanly close ws connections).
-        Default is max of 3 pings or 30 seconds.
-        """
-        return self.settings.get("websocket_ping_timeout", None)
-
-    @property
-    def max_message_size(self) -> int:
-        """Maximum allowed message size.
-
-        If the remote peer sends a message larger than this, the connection
-        will be closed.
-
-        Default is 10MiB.
-        """
-        return self.settings.get(
-            "websocket_max_message_size", _default_max_message_size
-        )
-
-    def write_message(
-        self, message: Union[bytes, str, Dict[str, Any]], binary: bool = False
-    ) -> "Future[None]":
-        """Sends the given message to the client of this Web Socket.
-
-        The message may be either a string or a dict (which will be
-        encoded as json).  If the ``binary`` argument is false, the
-        message will be sent as utf8; in binary mode any byte string
-        is allowed.
-
-        If the connection is already closed, raises `WebSocketClosedError`.
-        Returns a `.Future` which can be used for flow control.
-
-        .. versionchanged:: 3.2
-           `WebSocketClosedError` was added (previously a closed connection
-           would raise an `AttributeError`)
-
-        .. versionchanged:: 4.3
-           Returns a `.Future` which can be used for flow control.
-
-        .. versionchanged:: 5.0
-           Consistently raises `WebSocketClosedError`. Previously could
-           sometimes raise `.StreamClosedError`.
-        """
-        if self.ws_connection is None or self.ws_connection.is_closing():
-            raise WebSocketClosedError()
-        if isinstance(message, dict):
-            message = tornado.escape.json_encode(message)
-        return self.ws_connection.write_message(message, binary=binary)
-
-    def select_subprotocol(self, subprotocols: List[str]) -> Optional[str]:
-        """Override to implement subprotocol negotiation.
-
-        ``subprotocols`` is a list of strings identifying the
-        subprotocols proposed by the client.  This method may be
-        overridden to return one of those strings to select it, or
-        ``None`` to not select a subprotocol.
-
-        Failure to select a subprotocol does not automatically abort
-        the connection, although clients may close the connection if
-        none of their proposed subprotocols was selected.
-
-        The list may be empty, in which case this method must return
-        None. This method is always called exactly once even if no
-        subprotocols were proposed so that the handler can be advised
-        of this fact.
-
-        .. versionchanged:: 5.1
-
-           Previously, this method was called with a list containing
-           an empty string instead of an empty list if no subprotocols
-           were proposed by the client.
-        """
-        return None
-
-    @property
-    def selected_subprotocol(self) -> Optional[str]:
-        """The subprotocol returned by `select_subprotocol`.
-
-        .. versionadded:: 5.1
-        """
-        assert self.ws_connection is not None
-        return self.ws_connection.selected_subprotocol
-
-    def get_compression_options(self) -> Optional[Dict[str, Any]]:
-        """Override to return compression options for the connection.
-
-        If this method returns None (the default), compression will
-        be disabled.  If it returns a dict (even an empty one), it
-        will be enabled.  The contents of the dict may be used to
-        control the following compression options:
-
-        ``compression_level`` specifies the compression level.
-
-        ``mem_level`` specifies the amount of memory used for the internal compression state.
-
-         These parameters are documented in details here:
-         https://docs.python.org/3.6/library/zlib.html#zlib.compressobj
-
-        .. versionadded:: 4.1
-
-        .. versionchanged:: 4.5
-
-           Added ``compression_level`` and ``mem_level``.
-        """
-        # TODO: Add wbits option.
-        return None
-
-    def open(self, *args: str, **kwargs: str) -> Optional[Awaitable[None]]:
-        """Invoked when a new WebSocket is opened.
-
-        The arguments to `open` are extracted from the `tornado.web.URLSpec`
-        regular expression, just like the arguments to
-        `tornado.web.RequestHandler.get`.
-
-        `open` may be a coroutine. `on_message` will not be called until
-        `open` has returned.
-
-        .. versionchanged:: 5.1
-
-           ``open`` may be a coroutine.
-        """
-        pass
-
-    def on_message(self, message: Union[str, bytes]) -> Optional[Awaitable[None]]:
-        """Handle incoming messages on the WebSocket
-
-        This method must be overridden.
-
-        .. versionchanged:: 4.5
-
-           ``on_message`` can be a coroutine.
-        """
-        raise NotImplementedError
-
-    def ping(self, data: Union[str, bytes] = b"") -> None:
-        """Send ping frame to the remote end.
-
-        The data argument allows a small amount of data (up to 125
-        bytes) to be sent as a part of the ping message. Note that not
-        all websocket implementations expose this data to
-        applications.
-
-        Consider using the ``websocket_ping_interval`` application
-        setting instead of sending pings manually.
-
-        .. versionchanged:: 5.1
-
-           The data argument is now optional.
-
-        """
-        data = utf8(data)
-        if self.ws_connection is None or self.ws_connection.is_closing():
-            raise WebSocketClosedError()
-        self.ws_connection.write_ping(data)
-
-    def on_pong(self, data: bytes) -> None:
-        """Invoked when the response to a ping frame is received."""
-        pass
-
-    def on_ping(self, data: bytes) -> None:
-        """Invoked when the a ping frame is received."""
-        pass
-
-    def on_close(self) -> None:
-        """Invoked when the WebSocket is closed.
-
-        If the connection was closed cleanly and a status code or reason
-        phrase was supplied, these values will be available as the attributes
-        ``self.close_code`` and ``self.close_reason``.
-
-        .. versionchanged:: 4.0
-
-           Added ``close_code`` and ``close_reason`` attributes.
-        """
-        pass
-
-    def close(self, code: int = None, reason: str = None) -> None:
-        """Closes this Web Socket.
-
-        Once the close handshake is successful the socket will be closed.
-
-        ``code`` may be a numeric status code, taken from the values
-        defined in `RFC 6455 section 7.4.1
-        <https://tools.ietf.org/html/rfc6455#section-7.4.1>`_.
-        ``reason`` may be a textual message about why the connection is
-        closing.  These values are made available to the client, but are
-        not otherwise interpreted by the websocket protocol.
-
-        .. versionchanged:: 4.0
-
-           Added the ``code`` and ``reason`` arguments.
-        """
-        if self.ws_connection:
-            self.ws_connection.close(code, reason)
-            self.ws_connection = None
-
-    def check_origin(self, origin: str) -> bool:
-        """Override to enable support for allowing alternate origins.
-
-        The ``origin`` argument is the value of the ``Origin`` HTTP
-        header, the url responsible for initiating this request.  This
-        method is not called for clients that do not send this header;
-        such requests are always allowed (because all browsers that
-        implement WebSockets support this header, and non-browser
-        clients do not have the same cross-site security concerns).
-
-        Should return ``True`` to accept the request or ``False`` to
-        reject it. By default, rejects all requests with an origin on
-        a host other than this one.
-
-        This is a security protection against cross site scripting attacks on
-        browsers, since WebSockets are allowed to bypass the usual same-origin
-        policies and don't use CORS headers.
-
-        .. warning::
-
-           This is an important security measure; don't disable it
-           without understanding the security implications. In
-           particular, if your authentication is cookie-based, you
-           must either restrict the origins allowed by
-           ``check_origin()`` or implement your own XSRF-like
-           protection for websocket connections. See `these
-           <https://www.christian-schneider.net/CrossSiteWebSocketHijacking.html>`_
-           `articles
-           <https://devcenter.heroku.com/articles/websocket-security>`_
-           for more.
-
-        To accept all cross-origin traffic (which was the default prior to
-        Tornado 4.0), simply override this method to always return ``True``::
-
-            def check_origin(self, origin):
-                return True
-
-        To allow connections from any subdomain of your site, you might
-        do something like::
-
-            def check_origin(self, origin):
-                parsed_origin = urllib.parse.urlparse(origin)
-                return parsed_origin.netloc.endswith(".mydomain.com")
-
-        .. versionadded:: 4.0
-
-        """
-        parsed_origin = urlparse(origin)
-        origin = parsed_origin.netloc
-        origin = origin.lower()
-
-        host = self.request.headers.get("Host")
-
-        # Check to see that origin matches host directly, including ports
-        return origin == host
-
-    def set_nodelay(self, value: bool) -> None:
-        """Set the no-delay flag for this stream.
-
-        By default, small messages may be delayed and/or combined to minimize
-        the number of packets sent.  This can sometimes cause 200-500ms delays
-        due to the interaction between Nagle's algorithm and TCP delayed
-        ACKs.  To reduce this delay (at the expense of possibly increasing
-        bandwidth usage), call ``self.set_nodelay(True)`` once the websocket
-        connection is established.
-
-        See `.BaseIOStream.set_nodelay` for additional details.
-
-        .. versionadded:: 3.1
-        """
-        assert self.ws_connection is not None
-        self.ws_connection.set_nodelay(value)
-
-    def on_connection_close(self) -> None:
-        if self.ws_connection:
-            self.ws_connection.on_connection_close()
-            self.ws_connection = None
-        if not self._on_close_called:
-            self._on_close_called = True
-            self.on_close()
-            self._break_cycles()
-
-    def on_ws_connection_close(
-        self, close_code: int = None, close_reason: str = None
-    ) -> None:
-        self.close_code = close_code
-        self.close_reason = close_reason
-        self.on_connection_close()
-
-    def _break_cycles(self) -> None:
-        # WebSocketHandlers call finish() early, but we don't want to
-        # break up reference cycles (which makes it impossible to call
-        # self.render_string) until after we've really closed the
-        # connection (if it was established in the first place,
-        # indicated by status code 101).
-        if self.get_status() != 101 or self._on_close_called:
-            super(WebSocketHandler, self)._break_cycles()
-
-    def send_error(self, *args: Any, **kwargs: Any) -> None:
-        if self.stream is None:
-            super(WebSocketHandler, self).send_error(*args, **kwargs)
-        else:
-            # If we get an uncaught exception during the handshake,
-            # we have no choice but to abruptly close the connection.
-            # TODO: for uncaught exceptions after the handshake,
-            # we can close the connection more gracefully.
-            self.stream.close()
-
-    def get_websocket_protocol(self) -> Optional["WebSocketProtocol"]:
-        websocket_version = self.request.headers.get("Sec-WebSocket-Version")
-        if websocket_version in ("7", "8", "13"):
-            params = _WebSocketParams(
-                ping_interval=self.ping_interval,
-                ping_timeout=self.ping_timeout,
-                max_message_size=self.max_message_size,
-                compression_options=self.get_compression_options(),
-            )
-            return WebSocketProtocol13(self, False, params)
-        return None
-
-    def _detach_stream(self) -> IOStream:
-        # disable non-WS methods
-        for method in [
-            "write",
-            "redirect",
-            "set_header",
-            "set_cookie",
-            "set_status",
-            "flush",
-            "finish",
-        ]:
-            setattr(self, method, _raise_not_supported_for_websockets)
-        return self.detach()
-
-
-def _raise_not_supported_for_websockets(*args: Any, **kwargs: Any) -> None:
-    raise RuntimeError("Method not supported for Web Sockets")
-
-
-class WebSocketProtocol(abc.ABC):
-    """Base class for WebSocket protocol versions.
-    """
-
-    def __init__(self, handler: "_WebSocketDelegate") -> None:
-        self.handler = handler
-        self.stream = None  # type: Optional[IOStream]
-        self.client_terminated = False
-        self.server_terminated = False
-
-    def _run_callback(
-        self, callback: Callable, *args: Any, **kwargs: Any
-    ) -> "Optional[Future[Any]]":
-        """Runs the given callback with exception handling.
-
-        If the callback is a coroutine, returns its Future. On error, aborts the
-        websocket connection and returns None.
-        """
-        try:
-            result = callback(*args, **kwargs)
-        except Exception:
-            self.handler.log_exception(*sys.exc_info())
-            self._abort()
-            return None
-        else:
-            if result is not None:
-                result = gen.convert_yielded(result)
-                assert self.stream is not None
-                self.stream.io_loop.add_future(result, lambda f: f.result())
-            return result
-
-    def on_connection_close(self) -> None:
-        self._abort()
-
-    def _abort(self) -> None:
-        """Instantly aborts the WebSocket connection by closing the socket"""
-        self.client_terminated = True
-        self.server_terminated = True
-        if self.stream is not None:
-            self.stream.close()  # forcibly tear down the connection
-        self.close()  # let the subclass cleanup
-
-    @abc.abstractmethod
-    def close(self, code: int = None, reason: str = None) -> None:
-        raise NotImplementedError()
-
-    @abc.abstractmethod
-    def is_closing(self) -> bool:
-        raise NotImplementedError()
-
-    @abc.abstractmethod
-    async def accept_connection(self, handler: WebSocketHandler) -> None:
-        raise NotImplementedError()
-
-    @abc.abstractmethod
-    def write_message(
-        self, message: Union[str, bytes], binary: bool = False
-    ) -> "Future[None]":
-        raise NotImplementedError()
-
-    @property
-    @abc.abstractmethod
-    def selected_subprotocol(self) -> Optional[str]:
-        raise NotImplementedError()
-
-    @abc.abstractmethod
-    def write_ping(self, data: bytes) -> None:
-        raise NotImplementedError()
-
-    # The entry points below are used by WebSocketClientConnection,
-    # which was introduced after we only supported a single version of
-    # WebSocketProtocol. The WebSocketProtocol/WebSocketProtocol13
-    # boundary is currently pretty ad-hoc.
-    @abc.abstractmethod
-    def _process_server_headers(
-        self, key: Union[str, bytes], headers: httputil.HTTPHeaders
-    ) -> None:
-        raise NotImplementedError()
-
-    @abc.abstractmethod
-    def start_pinging(self) -> None:
-        raise NotImplementedError()
-
-    @abc.abstractmethod
-    async def _receive_frame_loop(self) -> None:
-        raise NotImplementedError()
-
-    @abc.abstractmethod
-    def set_nodelay(self, x: bool) -> None:
-        raise NotImplementedError()
-
-
-class _PerMessageDeflateCompressor(object):
-    def __init__(
-        self,
-        persistent: bool,
-        max_wbits: Optional[int],
-        compression_options: Dict[str, Any] = None,
-    ) -> None:
-        if max_wbits is None:
-            max_wbits = zlib.MAX_WBITS
-        # There is no symbolic constant for the minimum wbits value.
-        if not (8 <= max_wbits <= zlib.MAX_WBITS):
-            raise ValueError(
-                "Invalid max_wbits value %r; allowed range 8-%d",
-                max_wbits,
-                zlib.MAX_WBITS,
-            )
-        self._max_wbits = max_wbits
-
-        if (
-            compression_options is None
-            or "compression_level" not in compression_options
-        ):
-            self._compression_level = tornado.web.GZipContentEncoding.GZIP_LEVEL
-        else:
-            self._compression_level = compression_options["compression_level"]
-
-        if compression_options is None or "mem_level" not in compression_options:
-            self._mem_level = 8
-        else:
-            self._mem_level = compression_options["mem_level"]
-
-        if persistent:
-            self._compressor = self._create_compressor()  # type: Optional[_Compressor]
-        else:
-            self._compressor = None
-
-    def _create_compressor(self) -> "_Compressor":
-        return zlib.compressobj(
-            self._compression_level, zlib.DEFLATED, -self._max_wbits, self._mem_level
-        )
-
-    def compress(self, data: bytes) -> bytes:
-        compressor = self._compressor or self._create_compressor()
-        data = compressor.compress(data) + compressor.flush(zlib.Z_SYNC_FLUSH)
-        assert data.endswith(b"\x00\x00\xff\xff")
-        return data[:-4]
-
-
-class _PerMessageDeflateDecompressor(object):
-    def __init__(
-        self,
-        persistent: bool,
-        max_wbits: Optional[int],
-        max_message_size: int,
-        compression_options: Dict[str, Any] = None,
-    ) -> None:
-        self._max_message_size = max_message_size
-        if max_wbits is None:
-            max_wbits = zlib.MAX_WBITS
-        if not (8 <= max_wbits <= zlib.MAX_WBITS):
-            raise ValueError(
-                "Invalid max_wbits value %r; allowed range 8-%d",
-                max_wbits,
-                zlib.MAX_WBITS,
-            )
-        self._max_wbits = max_wbits
-        if persistent:
-            self._decompressor = (
-                self._create_decompressor()
-            )  # type: Optional[_Decompressor]
-        else:
-            self._decompressor = None
-
-    def _create_decompressor(self) -> "_Decompressor":
-        return zlib.decompressobj(-self._max_wbits)
-
-    def decompress(self, data: bytes) -> bytes:
-        decompressor = self._decompressor or self._create_decompressor()
-        result = decompressor.decompress(
-            data + b"\x00\x00\xff\xff", self._max_message_size
-        )
-        if decompressor.unconsumed_tail:
-            raise _DecompressTooLargeError()
-        return result
-
-
-class WebSocketProtocol13(WebSocketProtocol):
-    """Implementation of the WebSocket protocol from RFC 6455.
-
-    This class supports versions 7 and 8 of the protocol in addition to the
-    final version 13.
-    """
-
-    # Bit masks for the first byte of a frame.
-    FIN = 0x80
-    RSV1 = 0x40
-    RSV2 = 0x20
-    RSV3 = 0x10
-    RSV_MASK = RSV1 | RSV2 | RSV3
-    OPCODE_MASK = 0x0F
-
-    stream = None  # type: IOStream
-
-    def __init__(
-        self,
-        handler: "_WebSocketDelegate",
-        mask_outgoing: bool,
-        params: _WebSocketParams,
-    ) -> None:
-        WebSocketProtocol.__init__(self, handler)
-        self.mask_outgoing = mask_outgoing
-        self.params = params
-        self._final_frame = False
-        self._frame_opcode = None
-        self._masked_frame = None
-        self._frame_mask = None  # type: Optional[bytes]
-        self._frame_length = None
-        self._fragmented_message_buffer = None  # type: Optional[bytes]
-        self._fragmented_message_opcode = None
-        self._waiting = None  # type: object
-        self._compression_options = params.compression_options
-        self._decompressor = None  # type: Optional[_PerMessageDeflateDecompressor]
-        self._compressor = None  # type: Optional[_PerMessageDeflateCompressor]
-        self._frame_compressed = None  # type: Optional[bool]
-        # The total uncompressed size of all messages received or sent.
-        # Unicode messages are encoded to utf8.
-        # Only for testing; subject to change.
-        self._message_bytes_in = 0
-        self._message_bytes_out = 0
-        # The total size of all packets received or sent.  Includes
-        # the effect of compression, frame overhead, and control frames.
-        self._wire_bytes_in = 0
-        self._wire_bytes_out = 0
-        self.ping_callback = None  # type: Optional[PeriodicCallback]
-        self.last_ping = 0.0
-        self.last_pong = 0.0
-        self.close_code = None  # type: Optional[int]
-        self.close_reason = None  # type: Optional[str]
-
-    # Use a property for this to satisfy the abc.
-    @property
-    def selected_subprotocol(self) -> Optional[str]:
-        return self._selected_subprotocol
-
-    @selected_subprotocol.setter
-    def selected_subprotocol(self, value: Optional[str]) -> None:
-        self._selected_subprotocol = value
-
-    async def accept_connection(self, handler: WebSocketHandler) -> None:
-        try:
-            self._handle_websocket_headers(handler)
-        except ValueError:
-            handler.set_status(400)
-            log_msg = "Missing/Invalid WebSocket headers"
-            handler.finish(log_msg)
-            gen_log.debug(log_msg)
-            return
-
-        try:
-            await self._accept_connection(handler)
-        except asyncio.CancelledError:
-            self._abort()
-            return
-        except ValueError:
-            gen_log.debug("Malformed WebSocket request received", exc_info=True)
-            self._abort()
-            return
-
-    def _handle_websocket_headers(self, handler: WebSocketHandler) -> None:
-        """Verifies all invariant- and required headers
-
-        If a header is missing or have an incorrect value ValueError will be
-        raised
-        """
-        fields = ("Host", "Sec-Websocket-Key", "Sec-Websocket-Version")
-        if not all(map(lambda f: handler.request.headers.get(f), fields)):
-            raise ValueError("Missing/Invalid WebSocket headers")
-
-    @staticmethod
-    def compute_accept_value(key: Union[str, bytes]) -> str:
-        """Computes the value for the Sec-WebSocket-Accept header,
-        given the value for Sec-WebSocket-Key.
-        """
-        sha1 = hashlib.sha1()
-        sha1.update(utf8(key))
-        sha1.update(b"258EAFA5-E914-47DA-95CA-C5AB0DC85B11")  # Magic value
-        return native_str(base64.b64encode(sha1.digest()))
-
-    def _challenge_response(self, handler: WebSocketHandler) -> str:
-        return WebSocketProtocol13.compute_accept_value(
-            cast(str, handler.request.headers.get("Sec-Websocket-Key"))
-        )
-
-    async def _accept_connection(self, handler: WebSocketHandler) -> None:
-        subprotocol_header = handler.request.headers.get("Sec-WebSocket-Protocol")
-        if subprotocol_header:
-            subprotocols = [s.strip() for s in subprotocol_header.split(",")]
-        else:
-            subprotocols = []
-        self.selected_subprotocol = handler.select_subprotocol(subprotocols)
-        if self.selected_subprotocol:
-            assert self.selected_subprotocol in subprotocols
-            handler.set_header("Sec-WebSocket-Protocol", self.selected_subprotocol)
-
-        extensions = self._parse_extensions_header(handler.request.headers)
-        for ext in extensions:
-            if ext[0] == "permessage-deflate" and self._compression_options is not None:
-                # TODO: negotiate parameters if compression_options
-                # specifies limits.
-                self._create_compressors("server", ext[1], self._compression_options)
-                if (
-                    "client_max_window_bits" in ext[1]
-                    and ext[1]["client_max_window_bits"] is None
-                ):
-                    # Don't echo an offered client_max_window_bits
-                    # parameter with no value.
-                    del ext[1]["client_max_window_bits"]
-                handler.set_header(
-                    "Sec-WebSocket-Extensions",
-                    httputil._encode_header("permessage-deflate", ext[1]),
-                )
-                break
-
-        handler.clear_header("Content-Type")
-        handler.set_status(101)
-        handler.set_header("Upgrade", "websocket")
-        handler.set_header("Connection", "Upgrade")
-        handler.set_header("Sec-WebSocket-Accept", self._challenge_response(handler))
-        handler.finish()
-
-        self.stream = handler._detach_stream()
-
-        self.start_pinging()
-        try:
-            open_result = handler.open(*handler.open_args, **handler.open_kwargs)
-            if open_result is not None:
-                await open_result
-        except Exception:
-            handler.log_exception(*sys.exc_info())
-            self._abort()
-            return
-
-        await self._receive_frame_loop()
-
-    def _parse_extensions_header(
-        self, headers: httputil.HTTPHeaders
-    ) -> List[Tuple[str, Dict[str, str]]]:
-        extensions = headers.get("Sec-WebSocket-Extensions", "")
-        if extensions:
-            return [httputil._parse_header(e.strip()) for e in extensions.split(",")]
-        return []
-
-    def _process_server_headers(
-        self, key: Union[str, bytes], headers: httputil.HTTPHeaders
-    ) -> None:
-        """Process the headers sent by the server to this client connection.
-
-        'key' is the websocket handshake challenge/response key.
-        """
-        assert headers["Upgrade"].lower() == "websocket"
-        assert headers["Connection"].lower() == "upgrade"
-        accept = self.compute_accept_value(key)
-        assert headers["Sec-Websocket-Accept"] == accept
-
-        extensions = self._parse_extensions_header(headers)
-        for ext in extensions:
-            if ext[0] == "permessage-deflate" and self._compression_options is not None:
-                self._create_compressors("client", ext[1])
-            else:
-                raise ValueError("unsupported extension %r", ext)
-
-        self.selected_subprotocol = headers.get("Sec-WebSocket-Protocol", None)
-
-    def _get_compressor_options(
-        self,
-        side: str,
-        agreed_parameters: Dict[str, Any],
-        compression_options: Dict[str, Any] = None,
-    ) -> Dict[str, Any]:
-        """Converts a websocket agreed_parameters set to keyword arguments
-        for our compressor objects.
-        """
-        options = dict(
-            persistent=(side + "_no_context_takeover") not in agreed_parameters
-        )  # type: Dict[str, Any]
-        wbits_header = agreed_parameters.get(side + "_max_window_bits", None)
-        if wbits_header is None:
-            options["max_wbits"] = zlib.MAX_WBITS
-        else:
-            options["max_wbits"] = int(wbits_header)
-        options["compression_options"] = compression_options
-        return options
-
-    def _create_compressors(
-        self,
-        side: str,
-        agreed_parameters: Dict[str, Any],
-        compression_options: Dict[str, Any] = None,
-    ) -> None:
-        # TODO: handle invalid parameters gracefully
-        allowed_keys = set(
-            [
-                "server_no_context_takeover",
-                "client_no_context_takeover",
-                "server_max_window_bits",
-                "client_max_window_bits",
-            ]
-        )
-        for key in agreed_parameters:
-            if key not in allowed_keys:
-                raise ValueError("unsupported compression parameter %r" % key)
-        other_side = "client" if (side == "server") else "server"
-        self._compressor = _PerMessageDeflateCompressor(
-            **self._get_compressor_options(side, agreed_parameters, compression_options)
-        )
-        self._decompressor = _PerMessageDeflateDecompressor(
-            max_message_size=self.params.max_message_size,
-            **self._get_compressor_options(
-                other_side, agreed_parameters, compression_options
-            )
-        )
-
-    def _write_frame(
-        self, fin: bool, opcode: int, data: bytes, flags: int = 0
-    ) -> "Future[None]":
-        data_len = len(data)
-        if opcode & 0x8:
-            # All control frames MUST have a payload length of 125
-            # bytes or less and MUST NOT be fragmented.
-            if not fin:
-                raise ValueError("control frames may not be fragmented")
-            if data_len > 125:
-                raise ValueError("control frame payloads may not exceed 125 bytes")
-        if fin:
-            finbit = self.FIN
-        else:
-            finbit = 0
-        frame = struct.pack("B", finbit | opcode | flags)
-        if self.mask_outgoing:
-            mask_bit = 0x80
-        else:
-            mask_bit = 0
-        if data_len < 126:
-            frame += struct.pack("B", data_len | mask_bit)
-        elif data_len <= 0xFFFF:
-            frame += struct.pack("!BH", 126 | mask_bit, data_len)
-        else:
-            frame += struct.pack("!BQ", 127 | mask_bit, data_len)
-        if self.mask_outgoing:
-            mask = os.urandom(4)
-            data = mask + _websocket_mask(mask, data)
-        frame += data
-        self._wire_bytes_out += len(frame)
-        return self.stream.write(frame)
-
-    def write_message(
-        self, message: Union[str, bytes], binary: bool = False
-    ) -> "Future[None]":
-        """Sends the given message to the client of this Web Socket."""
-        if binary:
-            opcode = 0x2
-        else:
-            opcode = 0x1
-        message = tornado.escape.utf8(message)
-        assert isinstance(message, bytes)
-        self._message_bytes_out += len(message)
-        flags = 0
-        if self._compressor:
-            message = self._compressor.compress(message)
-            flags |= self.RSV1
-        # For historical reasons, write methods in Tornado operate in a semi-synchronous
-        # mode in which awaiting the Future they return is optional (But errors can
-        # still be raised). This requires us to go through an awkward dance here
-        # to transform the errors that may be returned while presenting the same
-        # semi-synchronous interface.
-        try:
-            fut = self._write_frame(True, opcode, message, flags=flags)
-        except StreamClosedError:
-            raise WebSocketClosedError()
-
-        async def wrapper() -> None:
-            try:
-                await fut
-            except StreamClosedError:
-                raise WebSocketClosedError()
-
-        return asyncio.ensure_future(wrapper())
-
-    def write_ping(self, data: bytes) -> None:
-        """Send ping frame."""
-        assert isinstance(data, bytes)
-        self._write_frame(True, 0x9, data)
-
-    async def _receive_frame_loop(self) -> None:
-        try:
-            while not self.client_terminated:
-                await self._receive_frame()
-        except StreamClosedError:
-            self._abort()
-        self.handler.on_ws_connection_close(self.close_code, self.close_reason)
-
-    async def _read_bytes(self, n: int) -> bytes:
-        data = await self.stream.read_bytes(n)
-        self._wire_bytes_in += n
-        return data
-
-    async def _receive_frame(self) -> None:
-        # Read the frame header.
-        data = await self._read_bytes(2)
-        header, mask_payloadlen = struct.unpack("BB", data)
-        is_final_frame = header & self.FIN
-        reserved_bits = header & self.RSV_MASK
-        opcode = header & self.OPCODE_MASK
-        opcode_is_control = opcode & 0x8
-        if self._decompressor is not None and opcode != 0:
-            # Compression flag is present in the first frame's header,
-            # but we can't decompress until we have all the frames of
-            # the message.
-            self._frame_compressed = bool(reserved_bits & self.RSV1)
-            reserved_bits &= ~self.RSV1
-        if reserved_bits:
-            # client is using as-yet-undefined extensions; abort
-            self._abort()
-            return
-        is_masked = bool(mask_payloadlen & 0x80)
-        payloadlen = mask_payloadlen & 0x7F
-
-        # Parse and validate the length.
-        if opcode_is_control and payloadlen >= 126:
-            # control frames must have payload < 126
-            self._abort()
-            return
-        if payloadlen < 126:
-            self._frame_length = payloadlen
-        elif payloadlen == 126:
-            data = await self._read_bytes(2)
-            payloadlen = struct.unpack("!H", data)[0]
-        elif payloadlen == 127:
-            data = await self._read_bytes(8)
-            payloadlen = struct.unpack("!Q", data)[0]
-        new_len = payloadlen
-        if self._fragmented_message_buffer is not None:
-            new_len += len(self._fragmented_message_buffer)
-        if new_len > self.params.max_message_size:
-            self.close(1009, "message too big")
-            self._abort()
-            return
-
-        # Read the payload, unmasking if necessary.
-        if is_masked:
-            self._frame_mask = await self._read_bytes(4)
-        data = await self._read_bytes(payloadlen)
-        if is_masked:
-            assert self._frame_mask is not None
-            data = _websocket_mask(self._frame_mask, data)
-
-        # Decide what to do with this frame.
-        if opcode_is_control:
-            # control frames may be interleaved with a series of fragmented
-            # data frames, so control frames must not interact with
-            # self._fragmented_*
-            if not is_final_frame:
-                # control frames must not be fragmented
-                self._abort()
-                return
-        elif opcode == 0:  # continuation frame
-            if self._fragmented_message_buffer is None:
-                # nothing to continue
-                self._abort()
-                return
-            self._fragmented_message_buffer += data
-            if is_final_frame:
-                opcode = self._fragmented_message_opcode
-                data = self._fragmented_message_buffer
-                self._fragmented_message_buffer = None
-        else:  # start of new data message
-            if self._fragmented_message_buffer is not None:
-                # can't start new message until the old one is finished
-                self._abort()
-                return
-            if not is_final_frame:
-                self._fragmented_message_opcode = opcode
-                self._fragmented_message_buffer = data
-
-        if is_final_frame:
-            handled_future = self._handle_message(opcode, data)
-            if handled_future is not None:
-                await handled_future
-
-    def _handle_message(self, opcode: int, data: bytes) -> "Optional[Future[None]]":
-        """Execute on_message, returning its Future if it is a coroutine."""
-        if self.client_terminated:
-            return None
-
-        if self._frame_compressed:
-            assert self._decompressor is not None
-            try:
-                data = self._decompressor.decompress(data)
-            except _DecompressTooLargeError:
-                self.close(1009, "message too big after decompression")
-                self._abort()
-                return None
-
-        if opcode == 0x1:
-            # UTF-8 data
-            self._message_bytes_in += len(data)
-            try:
-                decoded = data.decode("utf-8")
-            except UnicodeDecodeError:
-                self._abort()
-                return None
-            return self._run_callback(self.handler.on_message, decoded)
-        elif opcode == 0x2:
-            # Binary data
-            self._message_bytes_in += len(data)
-            return self._run_callback(self.handler.on_message, data)
-        elif opcode == 0x8:
-            # Close
-            self.client_terminated = True
-            if len(data) >= 2:
-                self.close_code = struct.unpack(">H", data[:2])[0]
-            if len(data) > 2:
-                self.close_reason = to_unicode(data[2:])
-            # Echo the received close code, if any (RFC 6455 section 5.5.1).
-            self.close(self.close_code)
-        elif opcode == 0x9:
-            # Ping
-            try:
-                self._write_frame(True, 0xA, data)
-            except StreamClosedError:
-                self._abort()
-            self._run_callback(self.handler.on_ping, data)
-        elif opcode == 0xA:
-            # Pong
-            self.last_pong = IOLoop.current().time()
-            return self._run_callback(self.handler.on_pong, data)
-        else:
-            self._abort()
-        return None
-
-    def close(self, code: int = None, reason: str = None) -> None:
-        """Closes the WebSocket connection."""
-        if not self.server_terminated:
-            if not self.stream.closed():
-                if code is None and reason is not None:
-                    code = 1000  # "normal closure" status code
-                if code is None:
-                    close_data = b""
-                else:
-                    close_data = struct.pack(">H", code)
-                if reason is not None:
-                    close_data += utf8(reason)
-                try:
-                    self._write_frame(True, 0x8, close_data)
-                except StreamClosedError:
-                    self._abort()
-            self.server_terminated = True
-        if self.client_terminated:
-            if self._waiting is not None:
-                self.stream.io_loop.remove_timeout(self._waiting)
-                self._waiting = None
-            self.stream.close()
-        elif self._waiting is None:
-            # Give the client a few seconds to complete a clean shutdown,
-            # otherwise just close the connection.
-            self._waiting = self.stream.io_loop.add_timeout(
-                self.stream.io_loop.time() + 5, self._abort
-            )
-
-    def is_closing(self) -> bool:
-        """Return ``True`` if this connection is closing.
-
-        The connection is considered closing if either side has
-        initiated its closing handshake or if the stream has been
-        shut down uncleanly.
-        """
-        return self.stream.closed() or self.client_terminated or self.server_terminated
-
-    @property
-    def ping_interval(self) -> Optional[float]:
-        interval = self.params.ping_interval
-        if interval is not None:
-            return interval
-        return 0
-
-    @property
-    def ping_timeout(self) -> Optional[float]:
-        timeout = self.params.ping_timeout
-        if timeout is not None:
-            return timeout
-        assert self.ping_interval is not None
-        return max(3 * self.ping_interval, 30)
-
-    def start_pinging(self) -> None:
-        """Start sending periodic pings to keep the connection alive"""
-        assert self.ping_interval is not None
-        if self.ping_interval > 0:
-            self.last_ping = self.last_pong = IOLoop.current().time()
-            self.ping_callback = PeriodicCallback(
-                self.periodic_ping, self.ping_interval * 1000
-            )
-            self.ping_callback.start()
-
-    def periodic_ping(self) -> None:
-        """Send a ping to keep the websocket alive
-
-        Called periodically if the websocket_ping_interval is set and non-zero.
-        """
-        if self.is_closing() and self.ping_callback is not None:
-            self.ping_callback.stop()
-            return
-
-        # Check for timeout on pong. Make sure that we really have
-        # sent a recent ping in case the machine with both server and
-        # client has been suspended since the last ping.
-        now = IOLoop.current().time()
-        since_last_pong = now - self.last_pong
-        since_last_ping = now - self.last_ping
-        assert self.ping_interval is not None
-        assert self.ping_timeout is not None
-        if (
-            since_last_ping < 2 * self.ping_interval
-            and since_last_pong > self.ping_timeout
-        ):
-            self.close()
-            return
-
-        self.write_ping(b"")
-        self.last_ping = now
-
-    def set_nodelay(self, x: bool) -> None:
-        self.stream.set_nodelay(x)
-
-
-class WebSocketClientConnection(simple_httpclient._HTTPConnection):
-    """WebSocket client connection.
-
-    This class should not be instantiated directly; use the
-    `websocket_connect` function instead.
-    """
-
-    protocol = None  # type: WebSocketProtocol
-
-    def __init__(
-        self,
-        request: httpclient.HTTPRequest,
-        on_message_callback: Callable[[Union[None, str, bytes]], None] = None,
-        compression_options: Dict[str, Any] = None,
-        ping_interval: float = None,
-        ping_timeout: float = None,
-        max_message_size: int = _default_max_message_size,
-        subprotocols: Optional[List[str]] = [],
-    ) -> None:
-        self.connect_future = Future()  # type: Future[WebSocketClientConnection]
-        self.read_queue = Queue(1)  # type: Queue[Union[None, str, bytes]]
-        self.key = base64.b64encode(os.urandom(16))
-        self._on_message_callback = on_message_callback
-        self.close_code = None  # type: Optional[int]
-        self.close_reason = None  # type: Optional[str]
-        self.params = _WebSocketParams(
-            ping_interval=ping_interval,
-            ping_timeout=ping_timeout,
-            max_message_size=max_message_size,
-            compression_options=compression_options,
-        )
-
-        scheme, sep, rest = request.url.partition(":")
-        scheme = {"ws": "http", "wss": "https"}[scheme]
-        request.url = scheme + sep + rest
-        request.headers.update(
-            {
-                "Upgrade": "websocket",
-                "Connection": "Upgrade",
-                "Sec-WebSocket-Key": self.key,
-                "Sec-WebSocket-Version": "13",
-            }
-        )
-        if subprotocols is not None:
-            request.headers["Sec-WebSocket-Protocol"] = ",".join(subprotocols)
-        if compression_options is not None:
-            # Always offer to let the server set our max_wbits (and even though
-            # we don't offer it, we will accept a client_no_context_takeover
-            # from the server).
-            # TODO: set server parameters for deflate extension
-            # if requested in self.compression_options.
-            request.headers[
-                "Sec-WebSocket-Extensions"
-            ] = "permessage-deflate; client_max_window_bits"
-
-        self.tcp_client = TCPClient()
-        super(WebSocketClientConnection, self).__init__(
-            None,
-            request,
-            lambda: None,
-            self._on_http_response,
-            104857600,
-            self.tcp_client,
-            65536,
-            104857600,
-        )
-
-    def close(self, code: int = None, reason: str = None) -> None:
-        """Closes the websocket connection.
-
-        ``code`` and ``reason`` are documented under
-        `WebSocketHandler.close`.
-
-        .. versionadded:: 3.2
-
-        .. versionchanged:: 4.0
-
-           Added the ``code`` and ``reason`` arguments.
-        """
-        if self.protocol is not None:
-            self.protocol.close(code, reason)
-            self.protocol = None  # type: ignore
-
-    def on_connection_close(self) -> None:
-        if not self.connect_future.done():
-            self.connect_future.set_exception(StreamClosedError())
-        self._on_message(None)
-        self.tcp_client.close()
-        super(WebSocketClientConnection, self).on_connection_close()
-
-    def on_ws_connection_close(
-        self, close_code: int = None, close_reason: str = None
-    ) -> None:
-        self.close_code = close_code
-        self.close_reason = close_reason
-        self.on_connection_close()
-
-    def _on_http_response(self, response: httpclient.HTTPResponse) -> None:
-        if not self.connect_future.done():
-            if response.error:
-                self.connect_future.set_exception(response.error)
-            else:
-                self.connect_future.set_exception(
-                    WebSocketError("Non-websocket response")
-                )
-
-    async def headers_received(
-        self,
-        start_line: Union[httputil.RequestStartLine, httputil.ResponseStartLine],
-        headers: httputil.HTTPHeaders,
-    ) -> None:
-        assert isinstance(start_line, httputil.ResponseStartLine)
-        if start_line.code != 101:
-            await super(WebSocketClientConnection, self).headers_received(
-                start_line, headers
-            )
-            return
-
-        if self._timeout is not None:
-            self.io_loop.remove_timeout(self._timeout)
-            self._timeout = None
-
-        self.headers = headers
-        self.protocol = self.get_websocket_protocol()
-        self.protocol._process_server_headers(self.key, self.headers)
-        self.protocol.stream = self.connection.detach()
-
-        IOLoop.current().add_callback(self.protocol._receive_frame_loop)
-        self.protocol.start_pinging()
-
-        # Once we've taken over the connection, clear the final callback
-        # we set on the http request.  This deactivates the error handling
-        # in simple_httpclient that would otherwise interfere with our
-        # ability to see exceptions.
-        self.final_callback = None  # type: ignore
-
-        future_set_result_unless_cancelled(self.connect_future, self)
-
-    def write_message(
-        self, message: Union[str, bytes], binary: bool = False
-    ) -> "Future[None]":
-        """Sends a message to the WebSocket server.
-
-        If the stream is closed, raises `WebSocketClosedError`.
-        Returns a `.Future` which can be used for flow control.
-
-        .. versionchanged:: 5.0
-           Exception raised on a closed stream changed from `.StreamClosedError`
-           to `WebSocketClosedError`.
-        """
-        return self.protocol.write_message(message, binary=binary)
-
-    def read_message(
-        self, callback: Callable[["Future[Union[None, str, bytes]]"], None] = None
-    ) -> Awaitable[Union[None, str, bytes]]:
-        """Reads a message from the WebSocket server.
-
-        If on_message_callback was specified at WebSocket
-        initialization, this function will never return messages
-
-        Returns a future whose result is the message, or None
-        if the connection is closed.  If a callback argument
-        is given it will be called with the future when it is
-        ready.
-        """
-
-        awaitable = self.read_queue.get()
-        if callback is not None:
-            self.io_loop.add_future(asyncio.ensure_future(awaitable), callback)
-        return awaitable
-
-    def on_message(self, message: Union[str, bytes]) -> Optional[Awaitable[None]]:
-        return self._on_message(message)
-
-    def _on_message(
-        self, message: Union[None, str, bytes]
-    ) -> Optional[Awaitable[None]]:
-        if self._on_message_callback:
-            self._on_message_callback(message)
-            return None
-        else:
-            return self.read_queue.put(message)
-
-    def ping(self, data: bytes = b"") -> None:
-        """Send ping frame to the remote end.
-
-        The data argument allows a small amount of data (up to 125
-        bytes) to be sent as a part of the ping message. Note that not
-        all websocket implementations expose this data to
-        applications.
-
-        Consider using the ``ping_interval`` argument to
-        `websocket_connect` instead of sending pings manually.
-
-        .. versionadded:: 5.1
-
-        """
-        data = utf8(data)
-        if self.protocol is None:
-            raise WebSocketClosedError()
-        self.protocol.write_ping(data)
-
-    def on_pong(self, data: bytes) -> None:
-        pass
-
-    def on_ping(self, data: bytes) -> None:
-        pass
-
-    def get_websocket_protocol(self) -> WebSocketProtocol:
-        return WebSocketProtocol13(self, mask_outgoing=True, params=self.params)
-
-    @property
-    def selected_subprotocol(self) -> Optional[str]:
-        """The subprotocol selected by the server.
-
-        .. versionadded:: 5.1
-        """
-        return self.protocol.selected_subprotocol
-
-    def log_exception(
-        self,
-        typ: "Optional[Type[BaseException]]",
-        value: Optional[BaseException],
-        tb: Optional[TracebackType],
-    ) -> None:
-        assert typ is not None
-        assert value is not None
-        app_log.error("Uncaught exception %s", value, exc_info=(typ, value, tb))
-
-
-def websocket_connect(
-    url: Union[str, httpclient.HTTPRequest],
-    callback: Callable[["Future[WebSocketClientConnection]"], None] = None,
-    connect_timeout: float = None,
-    on_message_callback: Callable[[Union[None, str, bytes]], None] = None,
-    compression_options: Dict[str, Any] = None,
-    ping_interval: float = None,
-    ping_timeout: float = None,
-    max_message_size: int = _default_max_message_size,
-    subprotocols: List[str] = None,
-) -> "Awaitable[WebSocketClientConnection]":
-    """Client-side websocket support.
-
-    Takes a url and returns a Future whose result is a
-    `WebSocketClientConnection`.
-
-    ``compression_options`` is interpreted in the same way as the
-    return value of `.WebSocketHandler.get_compression_options`.
-
-    The connection supports two styles of operation. In the coroutine
-    style, the application typically calls
-    `~.WebSocketClientConnection.read_message` in a loop::
-
-        conn = yield websocket_connect(url)
-        while True:
-            msg = yield conn.read_message()
-            if msg is None: break
-            # Do something with msg
-
-    In the callback style, pass an ``on_message_callback`` to
-    ``websocket_connect``. In both styles, a message of ``None``
-    indicates that the connection has been closed.
-
-    ``subprotocols`` may be a list of strings specifying proposed
-    subprotocols. The selected protocol may be found on the
-    ``selected_subprotocol`` attribute of the connection object
-    when the connection is complete.
-
-    .. versionchanged:: 3.2
-       Also accepts ``HTTPRequest`` objects in place of urls.
-
-    .. versionchanged:: 4.1
-       Added ``compression_options`` and ``on_message_callback``.
-
-    .. versionchanged:: 4.5
-       Added the ``ping_interval``, ``ping_timeout``, and ``max_message_size``
-       arguments, which have the same meaning as in `WebSocketHandler`.
-
-    .. versionchanged:: 5.0
-       The ``io_loop`` argument (deprecated since version 4.1) has been removed.
-
-    .. versionchanged:: 5.1
-       Added the ``subprotocols`` argument.
-    """
-    if isinstance(url, httpclient.HTTPRequest):
-        assert connect_timeout is None
-        request = url
-        # Copy and convert the headers dict/object (see comments in
-        # AsyncHTTPClient.fetch)
-        request.headers = httputil.HTTPHeaders(request.headers)
-    else:
-        request = httpclient.HTTPRequest(url, connect_timeout=connect_timeout)
-    request = cast(
-        httpclient.HTTPRequest,
-        httpclient._RequestProxy(request, httpclient.HTTPRequest._DEFAULTS),
-    )
-    conn = WebSocketClientConnection(
-        request,
-        on_message_callback=on_message_callback,
-        compression_options=compression_options,
-        ping_interval=ping_interval,
-        ping_timeout=ping_timeout,
-        max_message_size=max_message_size,
-        subprotocols=subprotocols,
-    )
-    if callback is not None:
-        IOLoop.current().add_future(conn.connect_future, callback)
-    return conn.connect_future
diff --git a/venv/lib/python3.7/site-packages/tornado/wsgi.py b/venv/lib/python3.7/site-packages/tornado/wsgi.py
deleted file mode 100644
index 77124aa..0000000
--- a/venv/lib/python3.7/site-packages/tornado/wsgi.py
+++ /dev/null
@@ -1,199 +0,0 @@
-#
-# Copyright 2009 Facebook
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-"""WSGI support for the Tornado web framework.
-
-WSGI is the Python standard for web servers, and allows for interoperability
-between Tornado and other Python web frameworks and servers.
-
-This module provides WSGI support via the `WSGIContainer` class, which
-makes it possible to run applications using other WSGI frameworks on
-the Tornado HTTP server. The reverse is not supported; the Tornado
-`.Application` and `.RequestHandler` classes are designed for use with
-the Tornado `.HTTPServer` and cannot be used in a generic WSGI
-container.
-
-"""
-
-import sys
-from io import BytesIO
-import tornado
-
-from tornado import escape
-from tornado import httputil
-from tornado.log import access_log
-
-from typing import List, Tuple, Optional, Callable, Any, Dict, Text
-from types import TracebackType
-import typing
-
-if typing.TYPE_CHECKING:
-    from typing import Type  # noqa: F401
-    from wsgiref.types import WSGIApplication as WSGIAppType  # noqa: F401
-
-
-# PEP 3333 specifies that WSGI on python 3 generally deals with byte strings
-# that are smuggled inside objects of type unicode (via the latin1 encoding).
-# This function is like those in the tornado.escape module, but defined
-# here to minimize the temptation to use it in non-wsgi contexts.
-def to_wsgi_str(s: bytes) -> str:
-    assert isinstance(s, bytes)
-    return s.decode("latin1")
-
-
-class WSGIContainer(object):
-    r"""Makes a WSGI-compatible function runnable on Tornado's HTTP server.
-
-    .. warning::
-
-       WSGI is a *synchronous* interface, while Tornado's concurrency model
-       is based on single-threaded asynchronous execution.  This means that
-       running a WSGI app with Tornado's `WSGIContainer` is *less scalable*
-       than running the same app in a multi-threaded WSGI server like
-       ``gunicorn`` or ``uwsgi``.  Use `WSGIContainer` only when there are
-       benefits to combining Tornado and WSGI in the same process that
-       outweigh the reduced scalability.
-
-    Wrap a WSGI function in a `WSGIContainer` and pass it to `.HTTPServer` to
-    run it. For example::
-
-        def simple_app(environ, start_response):
-            status = "200 OK"
-            response_headers = [("Content-type", "text/plain")]
-            start_response(status, response_headers)
-            return ["Hello world!\n"]
-
-        container = tornado.wsgi.WSGIContainer(simple_app)
-        http_server = tornado.httpserver.HTTPServer(container)
-        http_server.listen(8888)
-        tornado.ioloop.IOLoop.current().start()
-
-    This class is intended to let other frameworks (Django, web.py, etc)
-    run on the Tornado HTTP server and I/O loop.
-
-    The `tornado.web.FallbackHandler` class is often useful for mixing
-    Tornado and WSGI apps in the same server.  See
-    https://github.com/bdarnell/django-tornado-demo for a complete example.
-    """
-
-    def __init__(self, wsgi_application: "WSGIAppType") -> None:
-        self.wsgi_application = wsgi_application
-
-    def __call__(self, request: httputil.HTTPServerRequest) -> None:
-        data = {}  # type: Dict[str, Any]
-        response = []  # type: List[bytes]
-
-        def start_response(
-            status: str,
-            headers: List[Tuple[str, str]],
-            exc_info: Optional[
-                Tuple[
-                    "Optional[Type[BaseException]]",
-                    Optional[BaseException],
-                    Optional[TracebackType],
-                ]
-            ] = None,
-        ) -> Callable[[bytes], Any]:
-            data["status"] = status
-            data["headers"] = headers
-            return response.append
-
-        app_response = self.wsgi_application(
-            WSGIContainer.environ(request), start_response
-        )
-        try:
-            response.extend(app_response)
-            body = b"".join(response)
-        finally:
-            if hasattr(app_response, "close"):
-                app_response.close()  # type: ignore
-        if not data:
-            raise Exception("WSGI app did not call start_response")
-
-        status_code_str, reason = data["status"].split(" ", 1)
-        status_code = int(status_code_str)
-        headers = data["headers"]  # type: List[Tuple[str, str]]
-        header_set = set(k.lower() for (k, v) in headers)
-        body = escape.utf8(body)
-        if status_code != 304:
-            if "content-length" not in header_set:
-                headers.append(("Content-Length", str(len(body))))
-            if "content-type" not in header_set:
-                headers.append(("Content-Type", "text/html; charset=UTF-8"))
-        if "server" not in header_set:
-            headers.append(("Server", "TornadoServer/%s" % tornado.version))
-
-        start_line = httputil.ResponseStartLine("HTTP/1.1", status_code, reason)
-        header_obj = httputil.HTTPHeaders()
-        for key, value in headers:
-            header_obj.add(key, value)
-        assert request.connection is not None
-        request.connection.write_headers(start_line, header_obj, chunk=body)
-        request.connection.finish()
-        self._log(status_code, request)
-
-    @staticmethod
-    def environ(request: httputil.HTTPServerRequest) -> Dict[Text, Any]:
-        """Converts a `tornado.httputil.HTTPServerRequest` to a WSGI environment.
-        """
-        hostport = request.host.split(":")
-        if len(hostport) == 2:
-            host = hostport[0]
-            port = int(hostport[1])
-        else:
-            host = request.host
-            port = 443 if request.protocol == "https" else 80
-        environ = {
-            "REQUEST_METHOD": request.method,
-            "SCRIPT_NAME": "",
-            "PATH_INFO": to_wsgi_str(
-                escape.url_unescape(request.path, encoding=None, plus=False)
-            ),
-            "QUERY_STRING": request.query,
-            "REMOTE_ADDR": request.remote_ip,
-            "SERVER_NAME": host,
-            "SERVER_PORT": str(port),
-            "SERVER_PROTOCOL": request.version,
-            "wsgi.version": (1, 0),
-            "wsgi.url_scheme": request.protocol,
-            "wsgi.input": BytesIO(escape.utf8(request.body)),
-            "wsgi.errors": sys.stderr,
-            "wsgi.multithread": False,
-            "wsgi.multiprocess": True,
-            "wsgi.run_once": False,
-        }
-        if "Content-Type" in request.headers:
-            environ["CONTENT_TYPE"] = request.headers.pop("Content-Type")
-        if "Content-Length" in request.headers:
-            environ["CONTENT_LENGTH"] = request.headers.pop("Content-Length")
-        for key, value in request.headers.items():
-            environ["HTTP_" + key.replace("-", "_").upper()] = value
-        return environ
-
-    def _log(self, status_code: int, request: httputil.HTTPServerRequest) -> None:
-        if status_code < 400:
-            log_method = access_log.info
-        elif status_code < 500:
-            log_method = access_log.warning
-        else:
-            log_method = access_log.error
-        request_time = 1000.0 * request.request_time()
-        assert request.method is not None
-        assert request.uri is not None
-        summary = request.method + " " + request.uri + " (" + request.remote_ip + ")"
-        log_method("%d %s %.2fms", status_code, summary, request_time)
-
-
-HTTPRequest = httputil.HTTPServerRequest
diff --git a/venv/lib/python3.7/site-packages/uritools-3.0.0.dist-info/INSTALLER b/venv/lib/python3.7/site-packages/uritools-3.0.0.dist-info/INSTALLER
deleted file mode 100644
index a1b589e..0000000
--- a/venv/lib/python3.7/site-packages/uritools-3.0.0.dist-info/INSTALLER
+++ /dev/null
@@ -1 +0,0 @@
-pip
diff --git a/venv/lib/python3.7/site-packages/uritools-3.0.0.dist-info/LICENSE b/venv/lib/python3.7/site-packages/uritools-3.0.0.dist-info/LICENSE
deleted file mode 100644
index 7da84f4..0000000
--- a/venv/lib/python3.7/site-packages/uritools-3.0.0.dist-info/LICENSE
+++ /dev/null
@@ -1,20 +0,0 @@
-The MIT License (MIT)
-
-Copyright (c) 2014-2019 Thomas Kemmer
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal in
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
-COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
-IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/venv/lib/python3.7/site-packages/uritools-3.0.0.dist-info/METADATA b/venv/lib/python3.7/site-packages/uritools-3.0.0.dist-info/METADATA
deleted file mode 100644
index 18b83ff..0000000
--- a/venv/lib/python3.7/site-packages/uritools-3.0.0.dist-info/METADATA
+++ /dev/null
@@ -1,124 +0,0 @@
-Metadata-Version: 2.1
-Name: uritools
-Version: 3.0.0
-Summary: URI parsing, classification and composition
-Home-page: https://github.com/tkem/uritools/
-Author: Thomas Kemmer
-Author-email: tkemmer@computer.org
-License: MIT
-Platform: UNKNOWN
-Classifier: Development Status :: 5 - Production/Stable
-Classifier: Environment :: Other Environment
-Classifier: Intended Audience :: Developers
-Classifier: License :: OSI Approved :: MIT License
-Classifier: Operating System :: OS Independent
-Classifier: Programming Language :: Python
-Classifier: Programming Language :: Python :: 3
-Classifier: Programming Language :: Python :: 3.5
-Classifier: Programming Language :: Python :: 3.6
-Classifier: Programming Language :: Python :: 3.7
-Classifier: Programming Language :: Python :: 3.8
-Classifier: Topic :: Software Development :: Libraries :: Python Modules
-Requires-Python: ~=3.5
-
-uritools
-========================================================================
-
-.. image:: https://img.shields.io/pypi/v/uritools
-    :target: https://pypi.org/project/uritools
-    :alt: Latest PyPI version
-
-.. image:: https://img.shields.io/readthedocs/uritools
-   :target: https://uritools.readthedocs.io
-   :alt: Documentation build status
-
-.. image:: https://img.shields.io/travis/tkem/uritools
-    :target: https://travis-ci.org/tkem/uritools
-    :alt: Travis CI build status
-
-.. image:: https://img.shields.io/coveralls/tkem/uritools
-   :target: https://coveralls.io/r/tkem/uritools
-   :alt: Test coverage
-
-.. image:: https://img.shields.io/github/license/tkem/uritools
-   :target: http://raw.github.com/tkem/uritools/master/LICENSE
-   :alt: License
-
-This module provides RFC 3986 compliant functions for parsing,
-classifying and composing URIs and URI references, largely replacing
-the Python Standard Library's ``urllib.parse`` module.
-
-.. code-block:: pycon
-
-    >>> from uritools import uricompose, urijoin, urisplit, uriunsplit
-    >>> uricompose(scheme='foo', host='example.com', port=8042,
-    ...            path='/over/there', query={'name': 'ferret'},
-    ...            fragment='nose')
-    'foo://example.com:8042/over/there?name=ferret#nose'
-    >>> parts = urisplit(_)
-    >>> parts.scheme
-    'foo'
-    >>> parts.authority
-    'example.com:8042'
-    >>> parts.getport(default=80)
-    8042
-    >>> parts.getquerydict().get('name')
-    ['ferret']
-    >>> parts.isuri()
-    True
-    >>> parts.isabsuri()
-    False
-    >>> urijoin(uriunsplit(parts), '/right/here?name=swallow#beak')
-    'foo://example.com:8042/right/here?name=swallow#beak'
-
-For various reasons, ``urllib.parse`` and its Python 2 predecessor
-``urlparse`` are not compliant with current Internet standards.  As
-stated in `Lib/urllib/parse.py
-<https://github.com/python/cpython/blob/3.8/Lib/urllib/parse.py>`_:
-
-    RFC 3986 is considered the current standard and any future changes
-    to urlparse module should conform with it.  The urlparse module is
-    currently not entirely compliant with this RFC due to defacto
-    scenarios for parsing, and for backward compatibility purposes,
-    some parsing quirks from older RFCs are retained.
-
-This module aims to provide fully RFC 3986 compliant replacements for
-the most commonly used functions found in ``urllib.parse``.  It also
-includes functions for distinguishing between the different forms of
-URIs and URI references, and for conveniently creating URIs from their
-individual components.
-
-
-Installation
-------------------------------------------------------------------------
-
-uritools is available from PyPI_ and can be installed by running::
-
-  pip install uritools
-
-
-Project Resources
-------------------------------------------------------------------------
-
-- `Documentation`_
-- `Issue tracker`_
-- `Source code`_
-- `Change log`_
-
-
-License
-------------------------------------------------------------------------
-
-Copyright (c) 2014-2019 Thomas Kemmer.
-
-Licensed under the `MIT License`_.
-
-
-.. _PyPI: https://pypi.org/project/uritools/
-.. _Documentation: https://uritools.readthedocs.io/
-.. _Issue tracker: https://github.com/tkem/uritools/issues/
-.. _Source code: https://github.com/tkem/uritools/
-.. _Change log: https://github.com/tkem/uritools/blob/master/CHANGELOG.rst
-.. _MIT License: http://raw.github.com/tkem/uritools/master/LICENSE
-
-
diff --git a/venv/lib/python3.7/site-packages/uritools-3.0.0.dist-info/RECORD b/venv/lib/python3.7/site-packages/uritools-3.0.0.dist-info/RECORD
deleted file mode 100644
index 8b2c2f7..0000000
--- a/venv/lib/python3.7/site-packages/uritools-3.0.0.dist-info/RECORD
+++ /dev/null
@@ -1,22 +0,0 @@
-uritools-3.0.0.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
-uritools-3.0.0.dist-info/LICENSE,sha256=fdSWJiwLo3h_fuvwJmPFDDBf9XWoH2kgjhZFc42jz_w,1085
-uritools-3.0.0.dist-info/METADATA,sha256=TnQW6szwjUe1Qit-53yS0yuO-EkflnJFS28Cd7rRbEQ,4258
-uritools-3.0.0.dist-info/RECORD,,
-uritools-3.0.0.dist-info/WHEEL,sha256=_NOXIqFgOaYmlm9RJLPQZ13BJuEIrp5jx5ptRD5uh3Y,92
-uritools-3.0.0.dist-info/top_level.txt,sha256=Ho67FzoddNX4Z4ukDDQ0v0Mf3jq3dF5HgOCWwotU07g,9
-uritools/__init__.py,sha256=5bGelXU2iflWtz7DLhQ8I3LuH1sKnacHauBJo79XdNA,952
-uritools/__pycache__/__init__.cpython-37.pyc,,
-uritools/__pycache__/chars.cpython-37.pyc,,
-uritools/__pycache__/classify.cpython-37.pyc,,
-uritools/__pycache__/compose.cpython-37.pyc,,
-uritools/__pycache__/defrag.cpython-37.pyc,,
-uritools/__pycache__/encoding.cpython-37.pyc,,
-uritools/__pycache__/join.cpython-37.pyc,,
-uritools/__pycache__/split.cpython-37.pyc,,
-uritools/chars.py,sha256=aNT5UKzFKrJ1hEO5_6u8So3XYq-SFZdHDDitpEhnB-E,539
-uritools/classify.py,sha256=wROYKe4t9K3YQZs1IAbVUIcj0EdRUVi7k2c0Q7tumRU,926
-uritools/compose.py,sha256=Tssd5XaXuDulIdy5qN4xKZTffX_uJKjKHufo4xQPVuQ,8145
-uritools/defrag.py,sha256=ItlGns_4T3zxKgoK0F3B3pLlkcplFMvCQpAN1bm6ydY,1274
-uritools/encoding.py,sha256=6srnGFvEgmATxixzn6StgV8AR22zAYjDsSH6oW7KF6w,1575
-uritools/join.py,sha256=ZIsIL3vTpRIfI50AzNocB6-dlzMNjJbZD9YaEHH62hk,445
-uritools/split.py,sha256=LPfis-xMkQPhoiIKV6dyxD6eZEDPPnBARGZ_93bPBgA,13665
diff --git a/venv/lib/python3.7/site-packages/uritools-3.0.0.dist-info/WHEEL b/venv/lib/python3.7/site-packages/uritools-3.0.0.dist-info/WHEEL
deleted file mode 100644
index 4eeaea1..0000000
--- a/venv/lib/python3.7/site-packages/uritools-3.0.0.dist-info/WHEEL
+++ /dev/null
@@ -1,5 +0,0 @@
-Wheel-Version: 1.0
-Generator: bdist_wheel (0.32.3)
-Root-Is-Purelib: true
-Tag: py3-none-any
-
diff --git a/venv/lib/python3.7/site-packages/uritools-3.0.0.dist-info/top_level.txt b/venv/lib/python3.7/site-packages/uritools-3.0.0.dist-info/top_level.txt
deleted file mode 100644
index 50d5e45..0000000
--- a/venv/lib/python3.7/site-packages/uritools-3.0.0.dist-info/top_level.txt
+++ /dev/null
@@ -1 +0,0 @@
-uritools
diff --git a/venv/lib/python3.7/site-packages/uritools/__init__.py b/venv/lib/python3.7/site-packages/uritools/__init__.py
deleted file mode 100644
index 991b42c..0000000
--- a/venv/lib/python3.7/site-packages/uritools/__init__.py
+++ /dev/null
@@ -1,40 +0,0 @@
-"""RFC 3986 compliant, scheme-agnostic replacement for `urllib.parse`.
-
-This module defines RFC 3986 compliant replacements for the most
-commonly used functions of the Python Standard Library
-:mod:`urllib.parse` module.
-
-"""
-
-from .chars import GEN_DELIMS, RESERVED, SUB_DELIMS, UNRESERVED
-from .classify import isabspath, isabsuri, isnetpath, isrelpath
-from .classify import issamedoc, isuri
-from .compose import uricompose
-from .defrag import DefragResult, uridefrag
-from .encoding import uridecode, uriencode
-from .join import urijoin
-from .split import SplitResult, urisplit, uriunsplit
-
-__all__ = (
-    'GEN_DELIMS',
-    'RESERVED',
-    'SUB_DELIMS',
-    'UNRESERVED',
-    'DefragResult',
-    'SplitResult',
-    'isabspath',
-    'isabsuri',
-    'isnetpath',
-    'isrelpath',
-    'issamedoc',
-    'isuri',
-    'uricompose',
-    'uridecode',
-    'uridefrag',
-    'uriencode',
-    'urijoin',
-    'urisplit',
-    'uriunsplit'
-)
-
-__version__ = '3.0.0'
diff --git a/venv/lib/python3.7/site-packages/uritools/chars.py b/venv/lib/python3.7/site-packages/uritools/chars.py
deleted file mode 100644
index 1ba1305..0000000
--- a/venv/lib/python3.7/site-packages/uritools/chars.py
+++ /dev/null
@@ -1,23 +0,0 @@
-# RFC 3986 2.2.  Reserved Characters
-#
-#   reserved    = gen-delims / sub-delims
-#
-#   gen-delims  = ":" / "/" / "?" / "#" / "[" / "]" / "@"
-#
-#   sub-delims  = "!" / "$" / "&" / "'" / "(" / ")"
-#               / "*" / "+" / "," / ";" / "="
-#
-GEN_DELIMS = ':/?#[]@'
-SUB_DELIMS = "!$&'()*+,;="
-RESERVED = GEN_DELIMS + SUB_DELIMS
-
-# RFC 3986 2.3.  Unreserved Characters
-#
-#   unreserved  = ALPHA / DIGIT / "-" / "." / "_" / "~"
-#
-UNRESERVED = (
-    'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
-    'abcdefghijklmnopqrstuvwxyz'
-    '0123456789'
-    '-._~'
-)
diff --git a/venv/lib/python3.7/site-packages/uritools/classify.py b/venv/lib/python3.7/site-packages/uritools/classify.py
deleted file mode 100644
index c978ad2..0000000
--- a/venv/lib/python3.7/site-packages/uritools/classify.py
+++ /dev/null
@@ -1,33 +0,0 @@
-from .split import urisplit
-
-# TODO: use specialized checks/regexes for performance
-
-
-def isuri(uristring):
-    """Return :const:`True` if `uristring` is a URI."""
-    return urisplit(uristring).isuri()
-
-
-def isabsuri(uristring):
-    """Return :const:`True` if `uristring` is an absolute URI."""
-    return urisplit(uristring).isabsuri()
-
-
-def isnetpath(uristring):
-    """Return :const:`True` if `uristring` is a network-path reference."""
-    return urisplit(uristring).isnetpath()
-
-
-def isabspath(uristring):
-    """Return :const:`True` if `uristring` is an absolute-path reference."""
-    return urisplit(uristring).isabspath()
-
-
-def isrelpath(uristring):
-    """Return :const:`True` if `uristring` is a relative-path reference."""
-    return urisplit(uristring).isrelpath()
-
-
-def issamedoc(uristring):
-    """Return :const:`True` if `uristring` is a same-document reference."""
-    return urisplit(uristring).issamedoc()
diff --git a/venv/lib/python3.7/site-packages/uritools/compose.py b/venv/lib/python3.7/site-packages/uritools/compose.py
deleted file mode 100644
index ffe0112..0000000
--- a/venv/lib/python3.7/site-packages/uritools/compose.py
+++ /dev/null
@@ -1,204 +0,0 @@
-import collections
-import collections.abc
-import ipaddress
-import numbers
-import re
-
-from .chars import SUB_DELIMS
-from .encoding import uriencode
-from .split import uriunsplit
-
-# RFC 3986 3.1: scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
-_SCHEME_RE = re.compile(b'^[A-Za-z][A-Za-z0-9+.-]*$')
-
-# RFC 3986 3.2: authority = [ userinfo "@" ] host [ ":" port ]
-_AUTHORITY_RE_BYTES = re.compile(b'^(?:(.*)@)?(.*?)(?::([0-9]*))?$')
-_AUTHORITY_RE_STR = re.compile(u'^(?:(.*)@)?(.*?)(?::([0-9]*))?$')
-
-# safe component characters
-_SAFE_USERINFO = SUB_DELIMS + ':'
-_SAFE_HOST = SUB_DELIMS
-_SAFE_PATH = SUB_DELIMS + ':@/'
-_SAFE_QUERY = SUB_DELIMS + ':@/?'
-_SAFE_FRAGMENT = SUB_DELIMS + ':@/?'
-
-
-def _scheme(scheme):
-    if _SCHEME_RE.match(scheme):
-        return scheme.lower()
-    else:
-        raise ValueError('Invalid scheme component')
-
-
-def _authority(userinfo, host, port, encoding):
-    authority = []
-
-    if userinfo is not None:
-        authority.append(uriencode(userinfo, _SAFE_USERINFO, encoding))
-        authority.append(b'@')
-
-    if isinstance(host, ipaddress.IPv6Address):
-        authority.append(b'[' + host.compressed.encode() + b']')
-    elif isinstance(host, ipaddress.IPv4Address):
-        authority.append(host.compressed.encode())
-    elif isinstance(host, bytes):
-        authority.append(_host(host))
-    elif host is not None:
-        authority.append(_host(host.encode('utf-8')))
-
-    if isinstance(port, numbers.Number):
-        authority.append(_port(str(port).encode()))
-    elif isinstance(port, bytes):
-        authority.append(_port(port))
-    elif port is not None:
-        authority.append(_port(port.encode()))
-
-    return b''.join(authority) if authority else None
-
-
-def _ip_literal(address):
-    if address.startswith('v'):
-        raise ValueError('Address mechanism not supported')
-    else:
-        return b'[' + ipaddress.IPv6Address(address).compressed.encode() + b']'
-
-
-def _host(host):
-    # RFC 3986 3.2.3: Although host is case-insensitive, producers and
-    # normalizers should use lowercase for registered names and
-    # hexadecimal addresses for the sake of uniformity, while only
-    # using uppercase letters for percent-encodings.
-    if host.startswith(b'[') and host.endswith(b']'):
-        return _ip_literal(host[1:-1].decode())
-    # check for IPv6 addresses as returned by SplitResult.gethost()
-    try:
-        return _ip_literal(host.decode('utf-8'))
-    except ValueError:
-        return uriencode(host, _SAFE_HOST, 'utf-8').lower()
-
-
-def _port(port):
-    # RFC 3986 3.2.3: URI producers and normalizers should omit the
-    # port component and its ":" delimiter if port is empty or if its
-    # value would be the same as that of the scheme's default.
-    if port.lstrip(b'0123456789'):
-        raise ValueError('Invalid port subcomponent')
-    elif port:
-        return b':' + port
-    else:
-        return b''
-
-
-def _querylist(items, sep, encoding):
-    terms = []
-    append = terms.append
-    safe = _SAFE_QUERY.replace(sep, '')
-    for key, value in items:
-        name = uriencode(key, safe, encoding)
-        if value is None:
-            append(name)
-        elif isinstance(value, (bytes, str)):
-            append(name + b'=' + uriencode(value, safe, encoding))
-        else:
-            append(name + b'=' + uriencode(str(value), safe, encoding))
-    return sep.encode('ascii').join(terms)
-
-
-def _querydict(mapping, sep, encoding):
-    items = []
-    for key, value in mapping.items():
-        if isinstance(value, (bytes, str)):
-            items.append((key, value))
-        elif isinstance(value, collections.abc.Iterable):
-            items.extend([(key, v) for v in value])
-        else:
-            items.append((key, value))
-    return _querylist(items, sep, encoding)
-
-
-def uricompose(scheme=None, authority=None, path='', query=None,
-               fragment=None, userinfo=None, host=None, port=None,
-               querysep='&', encoding='utf-8'):
-    """Compose a URI reference string from its individual components."""
-
-    # RFC 3986 3.1: Scheme names consist of a sequence of characters
-    # beginning with a letter and followed by any combination of
-    # letters, digits, plus ("+"), period ("."), or hyphen ("-").
-    # Although schemes are case-insensitive, the canonical form is
-    # lowercase and documents that specify schemes must do so with
-    # lowercase letters.  An implementation should accept uppercase
-    # letters as equivalent to lowercase in scheme names (e.g., allow
-    # "HTTP" as well as "http") for the sake of robustness but should
-    # only produce lowercase scheme names for consistency.
-    if isinstance(scheme, bytes):
-        scheme = _scheme(scheme)
-    elif scheme is not None:
-        scheme = _scheme(scheme.encode())
-
-    # authority must be string type or three-item iterable
-    if authority is None:
-        authority = (None, None, None)
-    elif isinstance(authority, bytes):
-        authority = _AUTHORITY_RE_BYTES.match(authority).groups()
-    elif isinstance(authority, str):
-        authority = _AUTHORITY_RE_STR.match(authority).groups()
-    elif not isinstance(authority, collections.abc.Iterable):
-        raise TypeError('Invalid authority type')
-    elif len(authority) != 3:
-        raise ValueError('Invalid authority length')
-    authority = _authority(
-        userinfo if userinfo is not None else authority[0],
-        host if host is not None else authority[1],
-        port if port is not None else authority[2],
-        encoding
-    )
-
-    # RFC 3986 3.3: If a URI contains an authority component, then the
-    # path component must either be empty or begin with a slash ("/")
-    # character.  If a URI does not contain an authority component,
-    # then the path cannot begin with two slash characters ("//").
-    path = uriencode(path, _SAFE_PATH, encoding)
-    if authority is not None and path and not path.startswith(b'/'):
-        raise ValueError('Invalid path with authority component')
-    if authority is None and path.startswith(b'//'):
-        raise ValueError('Invalid path without authority component')
-
-    # RFC 3986 4.2: A path segment that contains a colon character
-    # (e.g., "this:that") cannot be used as the first segment of a
-    # relative-path reference, as it would be mistaken for a scheme
-    # name.  Such a segment must be preceded by a dot-segment (e.g.,
-    # "./this:that") to make a relative-path reference.
-    if scheme is None and authority is None and not path.startswith(b'/'):
-        if b':' in path.partition(b'/')[0]:
-            path = b'./' + path
-
-    # RFC 3986 3.4: The characters slash ("/") and question mark ("?")
-    # may represent data within the query component.  Beware that some
-    # older, erroneous implementations may not handle such data
-    # correctly when it is used as the base URI for relative
-    # references (Section 5.1), apparently because they fail to
-    # distinguish query data from path data when looking for
-    # hierarchical separators.  However, as query components are often
-    # used to carry identifying information in the form of "key=value"
-    # pairs and one frequently used value is a reference to another
-    # URI, it is sometimes better for usability to avoid percent-
-    # encoding those characters.
-    if isinstance(query, (bytes, str)):
-        query = uriencode(query, _SAFE_QUERY, encoding)
-    elif isinstance(query, collections.abc.Mapping):
-        query = _querydict(query, querysep, encoding)
-    elif isinstance(query, collections.abc.Iterable):
-        query = _querylist(query, querysep, encoding)
-    elif query is not None:
-        raise TypeError('Invalid query type')
-
-    # RFC 3986 3.5: The characters slash ("/") and question mark ("?")
-    # are allowed to represent data within the fragment identifier.
-    # Beware that some older, erroneous implementations may not handle
-    # this data correctly when it is used as the base URI for relative
-    # references.
-    if fragment is not None:
-        fragment = uriencode(fragment, _SAFE_FRAGMENT, encoding)
-
-    # return URI reference as `str`
-    return uriunsplit((scheme, authority, path, query, fragment)).decode()
diff --git a/venv/lib/python3.7/site-packages/uritools/defrag.py b/venv/lib/python3.7/site-packages/uritools/defrag.py
deleted file mode 100644
index 00d8735..0000000
--- a/venv/lib/python3.7/site-packages/uritools/defrag.py
+++ /dev/null
@@ -1,41 +0,0 @@
-import collections
-
-from .encoding import uridecode
-
-
-class DefragResult(collections.namedtuple('DefragResult', 'uri fragment')):
-    """Class to hold :func:`uridefrag` results."""
-
-    __slots__ = ()  # prevent creation of instance dictionary
-
-    def geturi(self):
-        """Return the recombined version of the original URI as a string."""
-        fragment = self.fragment
-        if fragment is None:
-            return self.uri
-        elif isinstance(fragment, bytes):
-            return self.uri + b'#' + fragment
-        else:
-            return self.uri + u'#' + fragment
-
-    def getfragment(self, default=None, encoding='utf-8', errors='strict'):
-        """Return the decoded fragment identifier, or `default` if the
-        original URI did not contain a fragment component.
-
-        """
-        fragment = self.fragment
-        if fragment is not None:
-            return uridecode(fragment, encoding, errors)
-        else:
-            return default
-
-
-def uridefrag(uristring):
-    """Remove an existing fragment component from a URI reference string.
-
-    """
-    if isinstance(uristring, bytes):
-        parts = uristring.partition(b'#')
-    else:
-        parts = uristring.partition(u'#')
-    return DefragResult(parts[0], parts[2] if parts[1] else None)
diff --git a/venv/lib/python3.7/site-packages/uritools/encoding.py b/venv/lib/python3.7/site-packages/uritools/encoding.py
deleted file mode 100644
index 1c60cca..0000000
--- a/venv/lib/python3.7/site-packages/uritools/encoding.py
+++ /dev/null
@@ -1,53 +0,0 @@
-from string import hexdigits as _hex
-
-from .chars import UNRESERVED
-
-
-# RFC 3986 2.1: For consistency, URI producers and normalizers should
-# use uppercase hexadecimal digits for all percent-encodings.
-def _pctenc(byte):
-    return ('%%%02X' % byte).encode()
-
-
-_unreserved = frozenset(UNRESERVED.encode())
-
-_encoded = {
-    b'': [bytes([i]) if i in _unreserved else _pctenc(i) for i in range(256)]
-}
-
-_decoded = {
-    (a + b).encode(): bytes.fromhex(a + b) for a in _hex for b in _hex
-}
-
-
-def uriencode(uristring, safe='', encoding='utf-8', errors='strict'):
-    """Encode a URI string or string component."""
-    if not isinstance(uristring, bytes):
-        uristring = uristring.encode(encoding, errors)
-    if not isinstance(safe, bytes):
-        safe = safe.encode('ascii')
-    try:
-        encoded = _encoded[safe]
-    except KeyError:
-        encoded = _encoded[b''][:]
-        for i in safe:
-            encoded[i] = bytes([i])
-        _encoded[safe] = encoded
-    return b''.join(map(encoded.__getitem__, uristring))
-
-
-def uridecode(uristring, encoding='utf-8', errors='strict'):
-    """Decode a URI string or string component."""
-    if not isinstance(uristring, bytes):
-        uristring = uristring.encode(encoding or 'ascii', errors)
-    parts = uristring.split(b'%')
-    result = [parts[0]]
-    append = result.append
-    decode = _decoded.get
-    for s in parts[1:]:
-        append(decode(s[:2], b'%' + s[:2]))
-        append(s[2:])
-    if encoding is not None:
-        return b''.join(result).decode(encoding, errors)
-    else:
-        return b''.join(result)
diff --git a/venv/lib/python3.7/site-packages/uritools/join.py b/venv/lib/python3.7/site-packages/uritools/join.py
deleted file mode 100644
index e2f211e..0000000
--- a/venv/lib/python3.7/site-packages/uritools/join.py
+++ /dev/null
@@ -1,14 +0,0 @@
-from .split import urisplit
-
-
-def urijoin(base, ref, strict=False):
-    """Convert a URI reference relative to a base URI to its target URI
-    string.
-
-    """
-    if isinstance(base, type(ref)):
-        return urisplit(base).transform(ref, strict).geturi()
-    elif isinstance(base, bytes):
-        return urisplit(base.decode()).transform(ref, strict).geturi()
-    else:
-        return urisplit(base).transform(ref.decode(), strict).geturi()
diff --git a/venv/lib/python3.7/site-packages/uritools/split.py b/venv/lib/python3.7/site-packages/uritools/split.py
deleted file mode 100644
index e7aa8c2..0000000
--- a/venv/lib/python3.7/site-packages/uritools/split.py
+++ /dev/null
@@ -1,399 +0,0 @@
-import collections
-import collections.abc
-import ipaddress
-import re
-
-from .encoding import uridecode
-
-_URI_COMPONENTS = ('scheme', 'authority', 'path', 'query', 'fragment')
-
-
-def _ip_literal(address):
-    # RFC 3986 3.2.2: In anticipation of future, as-yet-undefined IP
-    # literal address formats, an implementation may use an optional
-    # version flag to indicate such a format explicitly rather than
-    # rely on heuristic determination.
-    #
-    #  IP-literal = "[" ( IPv6address / IPvFuture  ) "]"
-    #
-    #  IPvFuture  = "v" 1*HEXDIG "." 1*( unreserved / sub-delims / ":" )
-    #
-    # If a URI containing an IP-literal that starts with "v"
-    # (case-insensitive), indicating that the version flag is present,
-    # is dereferenced by an application that does not know the meaning
-    # of that version flag, then the application should return an
-    # appropriate error for "address mechanism not supported".
-    if isinstance(address, bytes):
-        address = address.decode('ascii')
-    if address.startswith(u'v'):
-        raise ValueError('address mechanism not supported')
-    return ipaddress.IPv6Address(address)
-
-
-def _ipv4_address(address):
-    try:
-        if isinstance(address, bytes):
-            return ipaddress.IPv4Address(address.decode('ascii'))
-        else:
-            return ipaddress.IPv4Address(address)
-    except ValueError:
-        return None
-
-
-class SplitResult(collections.namedtuple('SplitResult', _URI_COMPONENTS)):
-    """Base class to hold :func:`urisplit` results."""
-
-    __slots__ = ()  # prevent creation of instance dictionary
-
-    @property
-    def userinfo(self):
-        authority = self.authority
-        if authority is None:
-            return None
-        userinfo, present, _ = authority.rpartition(self.AT)
-        if present:
-            return userinfo
-        else:
-            return None
-
-    @property
-    def host(self):
-        authority = self.authority
-        if authority is None:
-            return None
-        _, _, hostinfo = authority.rpartition(self.AT)
-        host, _, port = hostinfo.rpartition(self.COLON)
-        if port.lstrip(self.DIGITS):
-            return hostinfo
-        else:
-            return host
-
-    @property
-    def port(self):
-        authority = self.authority
-        if authority is None:
-            return None
-        _, present, port = authority.rpartition(self.COLON)
-        if present and not port.lstrip(self.DIGITS):
-            return port
-        else:
-            return None
-
-    def geturi(self):
-        """Return the re-combined version of the original URI reference as a
-        string.
-
-        """
-        scheme, authority, path, query, fragment = self
-
-        # RFC 3986 5.3. Component Recomposition
-        result = []
-        if scheme is not None:
-            result.extend([scheme, self.COLON])
-        if authority is not None:
-            result.extend([self.SLASH, self.SLASH, authority])
-        result.append(path)
-        if query is not None:
-            result.extend([self.QUEST, query])
-        if fragment is not None:
-            result.extend([self.HASH, fragment])
-        return self.EMPTY.join(result)
-
-    def getscheme(self, default=None):
-        """Return the URI scheme in canonical (lowercase) form, or `default`
-        if the original URI reference did not contain a scheme component.
-
-        """
-        scheme = self.scheme
-        if scheme is None:
-            return default
-        elif isinstance(scheme, bytes):
-            return scheme.decode('ascii').lower()
-        else:
-            return scheme.lower()
-
-    def getauthority(self, default=None, encoding='utf-8', errors='strict'):
-        """Return the decoded userinfo, host and port subcomponents of the URI
-        authority as a three-item tuple.
-
-        """
-        # TBD: (userinfo, host, port) kwargs, default string?
-        if default is None:
-            default = (None, None, None)
-        elif not isinstance(default, collections.abc.Iterable):
-            raise TypeError('Invalid default type')
-        elif len(default) != 3:
-            raise ValueError('Invalid default length')
-        # TODO: this could be much more efficient by using a dedicated regex
-        return (
-            self.getuserinfo(default[0], encoding, errors),
-            self.gethost(default[1], errors),
-            self.getport(default[2])
-        )
-
-    def getuserinfo(self, default=None, encoding='utf-8', errors='strict'):
-        """Return the decoded userinfo subcomponent of the URI authority, or
-        `default` if the original URI reference did not contain a
-        userinfo field.
-
-        """
-        userinfo = self.userinfo
-        if userinfo is None:
-            return default
-        else:
-            return uridecode(userinfo, encoding, errors)
-
-    def gethost(self, default=None, errors='strict'):
-        """Return the decoded host subcomponent of the URI authority as a
-        string or an :mod:`ipaddress` address object, or `default` if
-        the original URI reference did not contain a host.
-
-        """
-        host = self.host
-        if host is None or (not host and default is not None):
-            return default
-        elif host.startswith(self.LBRACKET) and host.endswith(self.RBRACKET):
-            return _ip_literal(host[1:-1])
-        elif host.startswith(self.LBRACKET) or host.endswith(self.RBRACKET):
-            raise ValueError('Invalid host %r' % host)
-        # TODO: faster check for IPv4 address?
-        return _ipv4_address(host) or uridecode(host, 'utf-8', errors).lower()
-
-    def getport(self, default=None):
-        """Return the port subcomponent of the URI authority as an
-        :class:`int`, or `default` if the original URI reference did
-        not contain a port or if the port was empty.
-
-        """
-        port = self.port
-        if port:
-            return int(port)
-        else:
-            return default
-
-    def getpath(self, encoding='utf-8', errors='strict'):
-        """Return the normalized decoded URI path."""
-        path = self.__remove_dot_segments(self.path)
-        return uridecode(path, encoding, errors)
-
-    def getquery(self, default=None, encoding='utf-8', errors='strict'):
-        """Return the decoded query string, or `default` if the original URI
-        reference did not contain a query component.
-
-        """
-        query = self.query
-        if query is None:
-            return default
-        else:
-            return uridecode(query, encoding, errors)
-
-    def getquerydict(self, sep='&', encoding='utf-8', errors='strict'):
-        """Split the query component into individual `name=value` pairs
-        separated by `sep` and return a dictionary of query variables.
-        The dictionary keys are the unique query variable names and
-        the values are lists of values for each name.
-
-        """
-        dict = collections.defaultdict(list)
-        for name, value in self.getquerylist(sep, encoding, errors):
-            dict[name].append(value)
-        return dict
-
-    def getquerylist(self, sep='&', encoding='utf-8', errors='strict'):
-        """Split the query component into individual `name=value` pairs
-        separated by `sep`, and return a list of `(name, value)`
-        tuples.
-
-        """
-        if not self.query:
-            return []
-        elif isinstance(sep, type(self.query)):
-            qsl = self.query.split(sep)
-        elif isinstance(sep, bytes):
-            qsl = self.query.split(sep.decode('ascii'))
-        else:
-            qsl = self.query.split(sep.encode('ascii'))
-        items = []
-        for parts in [qs.partition(self.EQ) for qs in qsl if qs]:
-            name = uridecode(parts[0], encoding, errors)
-            if parts[1]:
-                value = uridecode(parts[2], encoding, errors)
-            else:
-                value = None
-            items.append((name, value))
-        return items
-
-    def getfragment(self, default=None, encoding='utf-8', errors='strict'):
-        """Return the decoded fragment identifier, or `default` if the
-        original URI reference did not contain a fragment component.
-
-        """
-        fragment = self.fragment
-        if fragment is None:
-            return default
-        else:
-            return uridecode(fragment, encoding, errors)
-
-    def isuri(self):
-        """Return :const:`True` if this is a URI."""
-        return self.scheme is not None
-
-    def isabsuri(self):
-        """Return :const:`True` if this is an absolute URI."""
-        return self.scheme is not None and self.fragment is None
-
-    def isnetpath(self):
-        """Return :const:`True` if this is a network-path reference."""
-        return self.scheme is None and self.authority is not None
-
-    def isabspath(self):
-        """Return :const:`True` if this is an absolute-path reference."""
-        return (self.scheme is None and self.authority is None and
-                self.path.startswith(self.SLASH))
-
-    def isrelpath(self):
-        """Return :const:`True` if this is a relative-path reference."""
-        return (self.scheme is None and self.authority is None and
-                not self.path.startswith(self.SLASH))
-
-    def issamedoc(self):
-        """Return :const:`True` if this is a same-document reference."""
-        return (self.scheme is None and self.authority is None and
-                not self.path and self.query is None)
-
-    def transform(self, ref, strict=False):
-        """Transform a URI reference relative to `self` into a
-        :class:`SplitResult` representing its target URI.
-
-        """
-        scheme, authority, path, query, fragment = self.RE.match(ref).groups()
-
-        # RFC 3986 5.2.2. Transform References
-        if scheme is not None and (strict or scheme != self.scheme):
-            path = self.__remove_dot_segments(path)
-        elif authority is not None:
-            scheme = self.scheme
-            path = self.__remove_dot_segments(path)
-        elif not path:
-            scheme = self.scheme
-            authority = self.authority
-            path = self.path
-            query = self.query if query is None else query
-        elif path.startswith(self.SLASH):
-            scheme = self.scheme
-            authority = self.authority
-            path = self.__remove_dot_segments(path)
-        else:
-            scheme = self.scheme
-            authority = self.authority
-            path = self.__remove_dot_segments(self.__merge(path))
-        return type(self)(scheme, authority, path, query, fragment)
-
-    def __merge(self, path):
-        # RFC 3986 5.2.3. Merge Paths
-        if self.authority is not None and not self.path:
-            return self.SLASH + path
-        else:
-            parts = self.path.rpartition(self.SLASH)
-            return parts[1].join((parts[0], path))
-
-    @classmethod
-    def __remove_dot_segments(cls, path):
-        # RFC 3986 5.2.4. Remove Dot Segments
-        pseg = []
-        for s in path.split(cls.SLASH):
-            if s == cls.DOT:
-                continue
-            elif s != cls.DOTDOT:
-                pseg.append(s)
-            elif len(pseg) == 1 and not pseg[0]:
-                continue
-            elif pseg and pseg[-1] != cls.DOTDOT:
-                pseg.pop()
-            else:
-                pseg.append(s)
-        # adjust for trailing '/.' or '/..'
-        if path.rpartition(cls.SLASH)[2] in (cls.DOT, cls.DOTDOT):
-            pseg.append(cls.EMPTY)
-        if path and len(pseg) == 1 and pseg[0] == cls.EMPTY:
-            pseg.insert(0, cls.DOT)
-        return cls.SLASH.join(pseg)
-
-
-class SplitResultBytes(SplitResult):
-
-    __slots__ = ()  # prevent creation of instance dictionary
-
-    # RFC 3986 Appendix B
-    RE = re.compile(br"""
-    (?:([A-Za-z][A-Za-z0-9+.-]*):)?  # scheme (RFC 3986 3.1)
-    (?://([^/?#]*))?                 # authority
-    ([^?#]*)                         # path
-    (?:\?([^#]*))?                   # query
-    (?:\#(.*))?                      # fragment
-    """, flags=re.VERBOSE)
-
-    # RFC 3986 2.2 gen-delims
-    COLON, SLASH, QUEST, HASH, LBRACKET, RBRACKET, AT = (
-        b':', b'/', b'?', b'#', b'[', b']', b'@'
-    )
-
-    # RFC 3986 3.3 dot-segments
-    DOT, DOTDOT = b'.', b'..'
-
-    EMPTY, EQ = b'', b'='
-
-    DIGITS = b'0123456789'
-
-
-class SplitResultString(SplitResult):
-
-    __slots__ = ()  # prevent creation of instance dictionary
-
-    # RFC 3986 Appendix B
-    RE = re.compile(r"""
-    (?:([A-Za-z][A-Za-z0-9+.-]*):)?  # scheme (RFC 3986 3.1)
-    (?://([^/?#]*))?                 # authority
-    ([^?#]*)                         # path
-    (?:\?([^#]*))?                   # query
-    (?:\#(.*))?                      # fragment
-    """, flags=re.VERBOSE)
-
-    # RFC 3986 2.2 gen-delims
-    COLON, SLASH, QUEST, HASH, LBRACKET, RBRACKET, AT = (
-        u':', u'/', u'?', u'#', u'[', u']', u'@'
-    )
-
-    # RFC 3986 3.3 dot-segments
-    DOT, DOTDOT = u'.', u'..'
-
-    EMPTY, EQ = u'', u'='
-
-    DIGITS = u'0123456789'
-
-
-def urisplit(uristring):
-    """Split a well-formed URI reference string into a tuple with five
-    components corresponding to a URI's general structure::
-
-      <scheme>://<authority>/<path>?<query>#<fragment>
-
-    """
-    if isinstance(uristring, bytes):
-        result = SplitResultBytes
-    else:
-        result = SplitResultString
-    return result(*result.RE.match(uristring).groups())
-
-
-def uriunsplit(parts):
-    """Combine the elements of a five-item iterable into a URI reference's
-    string representation.
-
-    """
-    scheme, authority, path, query, fragment = parts
-    if isinstance(path, bytes):
-        result = SplitResultBytes
-    else:
-        result = SplitResultString
-    return result(scheme, authority, path, query, fragment).geturi()
diff --git a/venv/lib/python3.7/site-packages/urllib3-1.25.7.dist-info/INSTALLER b/venv/lib/python3.7/site-packages/urllib3-1.25.7.dist-info/INSTALLER
deleted file mode 100644
index a1b589e..0000000
--- a/venv/lib/python3.7/site-packages/urllib3-1.25.7.dist-info/INSTALLER
+++ /dev/null
@@ -1 +0,0 @@
-pip
diff --git a/venv/lib/python3.7/site-packages/urllib3-1.25.7.dist-info/LICENSE.txt b/venv/lib/python3.7/site-packages/urllib3-1.25.7.dist-info/LICENSE.txt
deleted file mode 100644
index c89cf27..0000000
--- a/venv/lib/python3.7/site-packages/urllib3-1.25.7.dist-info/LICENSE.txt
+++ /dev/null
@@ -1,21 +0,0 @@
-MIT License
-
-Copyright (c) 2008-2019 Andrey Petrov and contributors (see CONTRIBUTORS.txt)
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
diff --git a/venv/lib/python3.7/site-packages/urllib3-1.25.7.dist-info/METADATA b/venv/lib/python3.7/site-packages/urllib3-1.25.7.dist-info/METADATA
deleted file mode 100644
index eac8277..0000000
--- a/venv/lib/python3.7/site-packages/urllib3-1.25.7.dist-info/METADATA
+++ /dev/null
@@ -1,1229 +0,0 @@
-Metadata-Version: 2.1
-Name: urllib3
-Version: 1.25.7
-Summary: HTTP library with thread-safe connection pooling, file post, and more.
-Home-page: https://urllib3.readthedocs.io/
-Author: Andrey Petrov
-Author-email: andrey.petrov@shazow.net
-License: MIT
-Project-URL: Documentation, https://urllib3.readthedocs.io/
-Project-URL: Code, https://github.com/urllib3/urllib3
-Project-URL: Issue tracker, https://github.com/urllib3/urllib3/issues
-Keywords: urllib httplib threadsafe filepost http https ssl pooling
-Platform: UNKNOWN
-Classifier: Environment :: Web Environment
-Classifier: Intended Audience :: Developers
-Classifier: License :: OSI Approved :: MIT License
-Classifier: Operating System :: OS Independent
-Classifier: Programming Language :: Python
-Classifier: Programming Language :: Python :: 2
-Classifier: Programming Language :: Python :: 2.7
-Classifier: Programming Language :: Python :: 3
-Classifier: Programming Language :: Python :: 3.4
-Classifier: Programming Language :: Python :: 3.5
-Classifier: Programming Language :: Python :: 3.6
-Classifier: Programming Language :: Python :: 3.7
-Classifier: Programming Language :: Python :: 3.8
-Classifier: Programming Language :: Python :: Implementation :: CPython
-Classifier: Programming Language :: Python :: Implementation :: PyPy
-Classifier: Topic :: Internet :: WWW/HTTP
-Classifier: Topic :: Software Development :: Libraries
-Requires-Python: >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, <4
-Provides-Extra: brotli
-Requires-Dist: brotlipy (>=0.6.0) ; extra == 'brotli'
-Provides-Extra: secure
-Requires-Dist: pyOpenSSL (>=0.14) ; extra == 'secure'
-Requires-Dist: cryptography (>=1.3.4) ; extra == 'secure'
-Requires-Dist: idna (>=2.0.0) ; extra == 'secure'
-Requires-Dist: certifi ; extra == 'secure'
-Requires-Dist: ipaddress ; (python_version == "2.7") and extra == 'secure'
-Provides-Extra: socks
-Requires-Dist: PySocks (!=1.5.7,<2.0,>=1.5.6) ; extra == 'socks'
-
-urllib3
-=======
-
-urllib3 is a powerful, *sanity-friendly* HTTP client for Python. Much of the
-Python ecosystem already uses urllib3 and you should too.
-urllib3 brings many critical features that are missing from the Python
-standard libraries:
-
-- Thread safety.
-- Connection pooling.
-- Client-side SSL/TLS verification.
-- File uploads with multipart encoding.
-- Helpers for retrying requests and dealing with HTTP redirects.
-- Support for gzip, deflate, and brotli encoding.
-- Proxy support for HTTP and SOCKS.
-- 100% test coverage.
-
-urllib3 is powerful and easy to use::
-
-    >>> import urllib3
-    >>> http = urllib3.PoolManager()
-    >>> r = http.request('GET', 'http://httpbin.org/robots.txt')
-    >>> r.status
-    200
-    >>> r.data
-    'User-agent: *\nDisallow: /deny\n'
-
-
-Installing
-----------
-
-urllib3 can be installed with `pip <https://pip.pypa.io>`_::
-
-    $ pip install urllib3
-
-Alternatively, you can grab the latest source code from `GitHub <https://github.com/urllib3/urllib3>`_::
-
-    $ git clone git://github.com/urllib3/urllib3.git
-    $ python setup.py install
-
-
-Documentation
--------------
-
-urllib3 has usage and reference documentation at `urllib3.readthedocs.io <https://urllib3.readthedocs.io>`_.
-
-
-Contributing
-------------
-
-urllib3 happily accepts contributions. Please see our
-`contributing documentation <https://urllib3.readthedocs.io/en/latest/contributing.html>`_
-for some tips on getting started.
-
-
-Security Disclosures
---------------------
-
-To report a security vulnerability, please use the
-`Tidelift security contact <https://tidelift.com/security>`_.
-Tidelift will coordinate the fix and disclosure with maintainers.
-
-Maintainers
------------
-
-- `@sethmlarson <https://github.com/sethmlarson>`_ (Seth M. Larson)
-- `@theacodes <https://github.com/theacodes>`_ (Thea Flowers)
-- `@haikuginger <https://github.com/haikuginger>`_ (Jess Shapiro)
-- `@lukasa <https://github.com/lukasa>`_ (Cory Benfield)
-- `@sigmavirus24 <https://github.com/sigmavirus24>`_ (Ian Stapleton Cordasco)
-- `@shazow <https://github.com/shazow>`_ (Andrey Petrov)
-
-👋
-
-
-Sponsorship
------------
-
-.. |tideliftlogo| image:: https://nedbatchelder.com/pix/Tidelift_Logos_RGB_Tidelift_Shorthand_On-White_small.png
-   :width: 75
-   :alt: Tidelift
-
-.. list-table::
-   :widths: 10 100
-
-   * - |tideliftlogo|
-     - Professional support for urllib3 is available as part of the `Tidelift
-       Subscription`_.  Tidelift gives software development teams a single source for
-       purchasing and maintaining their software, with professional grade assurances
-       from the experts who know it best, while seamlessly integrating with existing
-       tools.
-
-.. _Tidelift Subscription: https://tidelift.com/subscription/pkg/pypi-urllib3?utm_source=pypi-urllib3&utm_medium=referral&utm_campaign=readme
-
-If your company benefits from this library, please consider `sponsoring its
-development <https://urllib3.readthedocs.io/en/latest/contributing.html#sponsorship-project-grants>`_.
-
-Sponsors include:
-
-- Abbott (2018-2019), sponsored `@sethmlarson <https://github.com/sethmlarson>`_'s work on urllib3.
-- Google Cloud Platform (2018-2019), sponsored `@theacodes <https://github.com/theacodes>`_'s work on urllib3.
-- Akamai (2017-2018), sponsored `@haikuginger <https://github.com/haikuginger>`_'s work on urllib3
-- Hewlett Packard Enterprise (2016-2017), sponsored `@Lukasa’s <https://github.com/Lukasa>`_ work on urllib3.
-
-
-Changes
-=======
-
-1.25.7 (2019-11-11)
--------------------
-
-* Preserve ``chunked`` parameter on retries (Pull #1715, Pull #1734)
-
-* Allow unset ``SERVER_SOFTWARE`` in App Engine (Pull #1704, Issue #1470)
-
-* Fix issue where URL fragment was sent within the request target. (Pull #1732)
-
-* Fix issue where an empty query section in a URL would fail to parse. (Pull #1732)
-
-* Remove TLS 1.3 support in SecureTransport due to Apple removing support (Pull #1703)
-
-
-1.25.6 (2019-09-24)
--------------------
-
-* Fix issue where tilde (``~``) characters were incorrectly
-  percent-encoded in the path. (Pull #1692)
-
-
-1.25.5 (2019-09-19)
--------------------
-
-* Add mitigation for BPO-37428 affecting Python <3.7.4 and OpenSSL 1.1.1+ which
-  caused certificate verification to be enabled when using ``cert_reqs=CERT_NONE``.
-  (Issue #1682)
-
-
-1.25.4 (2019-09-19)
--------------------
-
-* Propagate Retry-After header settings to subsequent retries. (Pull #1607)
-
-* Fix edge case where Retry-After header was still respected even when
-  explicitly opted out of. (Pull #1607)
-
-* Remove dependency on ``rfc3986`` for URL parsing.
-
-* Fix issue where URLs containing invalid characters within ``Url.auth`` would
-  raise an exception instead of percent-encoding those characters.
-
-* Add support for ``HTTPResponse.auto_close = False`` which makes HTTP responses
-  work well with BufferedReaders and other ``io`` module features. (Pull #1652)
-
-* Percent-encode invalid characters in URL for ``HTTPConnectionPool.request()`` (Pull #1673)
-
-
-1.25.3 (2019-05-23)
--------------------
-
-* Change ``HTTPSConnection`` to load system CA certificates
-  when ``ca_certs``, ``ca_cert_dir``, and ``ssl_context`` are
-  unspecified. (Pull #1608, Issue #1603)
-
-* Upgrade bundled rfc3986 to v1.3.2. (Pull #1609, Issue #1605)
-
-
-1.25.2 (2019-04-28)
--------------------
-
-* Change ``is_ipaddress`` to not detect IPvFuture addresses. (Pull #1583)
-
-* Change ``parse_url`` to percent-encode invalid characters within the
-  path, query, and target components. (Pull #1586)
-
-
-1.25.1 (2019-04-24)
--------------------
-
-* Add support for Google's ``Brotli`` package. (Pull #1572, Pull #1579)
-
-* Upgrade bundled rfc3986 to v1.3.1 (Pull #1578)
-
-
-1.25 (2019-04-22)
------------------
-
-* Require and validate certificates by default when using HTTPS (Pull #1507)
-
-* Upgraded ``urllib3.utils.parse_url()`` to be RFC 3986 compliant. (Pull #1487)
-
-* Added support for ``key_password`` for ``HTTPSConnectionPool`` to use
-  encrypted ``key_file`` without creating your own ``SSLContext`` object. (Pull #1489)
-
-* Add TLSv1.3 support to CPython, pyOpenSSL, and SecureTransport ``SSLContext``
-  implementations. (Pull #1496)
-
-* Switched the default multipart header encoder from RFC 2231 to HTML 5 working draft. (Issue #303, PR #1492)
-
-* Fixed issue where OpenSSL would block if an encrypted client private key was
-  given and no password was given. Instead an ``SSLError`` is raised. (Pull #1489)
-
-* Added support for Brotli content encoding. It is enabled automatically if
-  ``brotlipy`` package is installed which can be requested with
-  ``urllib3[brotli]`` extra. (Pull #1532)
-
-* Drop ciphers using DSS key exchange from default TLS cipher suites.
-  Improve default ciphers when using SecureTransport. (Pull #1496)
-
-* Implemented a more efficient ``HTTPResponse.__iter__()`` method. (Issue #1483)
-
-1.24.3 (2019-05-01)
--------------------
-
-* Apply fix for CVE-2019-9740. (Pull #1591)
-
-1.24.2 (2019-04-17)
--------------------
-
-* Don't load system certificates by default when any other ``ca_certs``, ``ca_certs_dir`` or
-  ``ssl_context`` parameters are specified.
-
-* Remove Authorization header regardless of case when redirecting to cross-site. (Issue #1510)
-
-* Add support for IPv6 addresses in subjectAltName section of certificates. (Issue #1269)
-
-
-1.24.1 (2018-11-02)
--------------------
-
-* Remove quadratic behavior within ``GzipDecoder.decompress()`` (Issue #1467)
-
-* Restored functionality of ``ciphers`` parameter for ``create_urllib3_context()``. (Issue #1462)
-
-
-1.24 (2018-10-16)
------------------
-
-* Allow key_server_hostname to be specified when initializing a PoolManager to allow custom SNI to be overridden. (Pull #1449)
-
-* Test against Python 3.7 on AppVeyor. (Pull #1453)
-
-* Early-out ipv6 checks when running on App Engine. (Pull #1450)
-
-* Change ambiguous description of backoff_factor (Pull #1436)
-
-* Add ability to handle multiple Content-Encodings (Issue #1441 and Pull #1442)
-
-* Skip DNS names that can't be idna-decoded when using pyOpenSSL (Issue #1405).
-
-* Add a server_hostname parameter to HTTPSConnection which allows for
-  overriding the SNI hostname sent in the handshake. (Pull #1397)
-
-* Drop support for EOL Python 2.6 (Pull #1429 and Pull #1430)
-
-* Fixed bug where responses with header Content-Type: message/* erroneously
-  raised HeaderParsingError, resulting in a warning being logged. (Pull #1439)
-
-* Move urllib3 to src/urllib3 (Pull #1409)
-
-
-1.23 (2018-06-04)
------------------
-
-* Allow providing a list of headers to strip from requests when redirecting
-  to a different host. Defaults to the ``Authorization`` header. Different
-  headers can be set via ``Retry.remove_headers_on_redirect``. (Issue #1316)
-
-* Fix ``util.selectors._fileobj_to_fd`` to accept ``long`` (Issue #1247).
-
-* Dropped Python 3.3 support. (Pull #1242)
-
-* Put the connection back in the pool when calling stream() or read_chunked() on
-  a chunked HEAD response. (Issue #1234)
-
-* Fixed pyOpenSSL-specific ssl client authentication issue when clients
-  attempted to auth via certificate + chain (Issue #1060)
-
-* Add the port to the connectionpool connect print (Pull #1251)
-
-* Don't use the ``uuid`` module to create multipart data boundaries. (Pull #1380)
-
-* ``read_chunked()`` on a closed response returns no chunks. (Issue #1088)
-
-* Add Python 2.6 support to ``contrib.securetransport`` (Pull #1359)
-
-* Added support for auth info in url for SOCKS proxy (Pull #1363)
-
-
-1.22 (2017-07-20)
------------------
-
-* Fixed missing brackets in ``HTTP CONNECT`` when connecting to IPv6 address via
-  IPv6 proxy. (Issue #1222)
-
-* Made the connection pool retry on ``SSLError``.  The original ``SSLError``
-  is available on ``MaxRetryError.reason``. (Issue #1112)
-
-* Drain and release connection before recursing on retry/redirect.  Fixes
-  deadlocks with a blocking connectionpool. (Issue #1167)
-
-* Fixed compatibility for cookiejar. (Issue #1229)
-
-* pyopenssl: Use vendored version of ``six``. (Issue #1231)
-
-
-1.21.1 (2017-05-02)
--------------------
-
-* Fixed SecureTransport issue that would cause long delays in response body
-  delivery. (Pull #1154)
-
-* Fixed regression in 1.21 that threw exceptions when users passed the
-  ``socket_options`` flag to the ``PoolManager``.  (Issue #1165)
-
-* Fixed regression in 1.21 that threw exceptions when users passed the
-  ``assert_hostname`` or ``assert_fingerprint`` flag to the ``PoolManager``.
-  (Pull #1157)
-
-
-1.21 (2017-04-25)
------------------
-
-* Improved performance of certain selector system calls on Python 3.5 and
-  later. (Pull #1095)
-
-* Resolved issue where the PyOpenSSL backend would not wrap SysCallError
-  exceptions appropriately when sending data. (Pull #1125)
-
-* Selectors now detects a monkey-patched select module after import for modules
-  that patch the select module like eventlet, greenlet. (Pull #1128)
-
-* Reduced memory consumption when streaming zlib-compressed responses
-  (as opposed to raw deflate streams). (Pull #1129)
-
-* Connection pools now use the entire request context when constructing the
-  pool key. (Pull #1016)
-
-* ``PoolManager.connection_from_*`` methods now accept a new keyword argument,
-  ``pool_kwargs``, which are merged with the existing ``connection_pool_kw``.
-  (Pull #1016)
-
-* Add retry counter for ``status_forcelist``. (Issue #1147)
-
-* Added ``contrib`` module for using SecureTransport on macOS:
-  ``urllib3.contrib.securetransport``.  (Pull #1122)
-
-* urllib3 now only normalizes the case of ``http://`` and ``https://`` schemes:
-  for schemes it does not recognise, it assumes they are case-sensitive and
-  leaves them unchanged.
-  (Issue #1080)
-
-
-1.20 (2017-01-19)
------------------
-
-* Added support for waiting for I/O using selectors other than select,
-  improving urllib3's behaviour with large numbers of concurrent connections.
-  (Pull #1001)
-
-* Updated the date for the system clock check. (Issue #1005)
-
-* ConnectionPools now correctly consider hostnames to be case-insensitive.
-  (Issue #1032)
-
-* Outdated versions of PyOpenSSL now cause the PyOpenSSL contrib module
-  to fail when it is injected, rather than at first use. (Pull #1063)
-
-* Outdated versions of cryptography now cause the PyOpenSSL contrib module
-  to fail when it is injected, rather than at first use. (Issue #1044)
-
-* Automatically attempt to rewind a file-like body object when a request is
-  retried or redirected. (Pull #1039)
-
-* Fix some bugs that occur when modules incautiously patch the queue module.
-  (Pull #1061)
-
-* Prevent retries from occurring on read timeouts for which the request method
-  was not in the method whitelist. (Issue #1059)
-
-* Changed the PyOpenSSL contrib module to lazily load idna to avoid
-  unnecessarily bloating the memory of programs that don't need it. (Pull
-  #1076)
-
-* Add support for IPv6 literals with zone identifiers. (Pull #1013)
-
-* Added support for socks5h:// and socks4a:// schemes when working with SOCKS
-  proxies, and controlled remote DNS appropriately. (Issue #1035)
-
-
-1.19.1 (2016-11-16)
--------------------
-
-* Fixed AppEngine import that didn't function on Python 3.5. (Pull #1025)
-
-
-1.19 (2016-11-03)
------------------
-
-* urllib3 now respects Retry-After headers on 413, 429, and 503 responses when
-  using the default retry logic. (Pull #955)
-
-* Remove markers from setup.py to assist ancient setuptools versions. (Issue
-  #986)
-
-* Disallow superscripts and other integerish things in URL ports. (Issue #989)
-
-* Allow urllib3's HTTPResponse.stream() method to continue to work with
-  non-httplib underlying FPs. (Pull #990)
-
-* Empty filenames in multipart headers are now emitted as such, rather than
-  being suppressed. (Issue #1015)
-
-* Prefer user-supplied Host headers on chunked uploads. (Issue #1009)
-
-
-1.18.1 (2016-10-27)
--------------------
-
-* CVE-2016-9015. Users who are using urllib3 version 1.17 or 1.18 along with
-  PyOpenSSL injection and OpenSSL 1.1.0 *must* upgrade to this version. This
-  release fixes a vulnerability whereby urllib3 in the above configuration
-  would silently fail to validate TLS certificates due to erroneously setting
-  invalid flags in OpenSSL's ``SSL_CTX_set_verify`` function. These erroneous
-  flags do not cause a problem in OpenSSL versions before 1.1.0, which
-  interprets the presence of any flag as requesting certificate validation.
-
-  There is no PR for this patch, as it was prepared for simultaneous disclosure
-  and release. The master branch received the same fix in PR #1010.
-
-
-1.18 (2016-09-26)
------------------
-
-* Fixed incorrect message for IncompleteRead exception. (PR #973)
-
-* Accept ``iPAddress`` subject alternative name fields in TLS certificates.
-  (Issue #258)
-
-* Fixed consistency of ``HTTPResponse.closed`` between Python 2 and 3.
-  (Issue #977)
-
-* Fixed handling of wildcard certificates when using PyOpenSSL. (Issue #979)
-
-
-1.17 (2016-09-06)
------------------
-
-* Accept ``SSLContext`` objects for use in SSL/TLS negotiation. (Issue #835)
-
-* ConnectionPool debug log now includes scheme, host, and port. (Issue #897)
-
-* Substantially refactored documentation. (Issue #887)
-
-* Used URLFetch default timeout on AppEngine, rather than hardcoding our own.
-  (Issue #858)
-
-* Normalize the scheme and host in the URL parser (Issue #833)
-
-* ``HTTPResponse`` contains the last ``Retry`` object, which now also
-  contains retries history. (Issue #848)
-
-* Timeout can no longer be set as boolean, and must be greater than zero.
-  (PR #924)
-
-* Removed pyasn1 and ndg-httpsclient from dependencies used for PyOpenSSL. We
-  now use cryptography and idna, both of which are already dependencies of
-  PyOpenSSL. (PR #930)
-
-* Fixed infinite loop in ``stream`` when amt=None. (Issue #928)
-
-* Try to use the operating system's certificates when we are using an
-  ``SSLContext``. (PR #941)
-
-* Updated cipher suite list to allow ChaCha20+Poly1305. AES-GCM is preferred to
-  ChaCha20, but ChaCha20 is then preferred to everything else. (PR #947)
-
-* Updated cipher suite list to remove 3DES-based cipher suites. (PR #958)
-
-* Removed the cipher suite fallback to allow HIGH ciphers. (PR #958)
-
-* Implemented ``length_remaining`` to determine remaining content
-  to be read. (PR #949)
-
-* Implemented ``enforce_content_length`` to enable exceptions when
-  incomplete data chunks are received. (PR #949)
-
-* Dropped connection start, dropped connection reset, redirect, forced retry,
-  and new HTTPS connection log levels to DEBUG, from INFO. (PR #967)
-
-
-1.16 (2016-06-11)
------------------
-
-* Disable IPv6 DNS when IPv6 connections are not possible. (Issue #840)
-
-* Provide ``key_fn_by_scheme`` pool keying mechanism that can be
-  overridden. (Issue #830)
-
-* Normalize scheme and host to lowercase for pool keys, and include
-  ``source_address``. (Issue #830)
-
-* Cleaner exception chain in Python 3 for ``_make_request``.
-  (Issue #861)
-
-* Fixed installing ``urllib3[socks]`` extra. (Issue #864)
-
-* Fixed signature of ``ConnectionPool.close`` so it can actually safely be
-  called by subclasses. (Issue #873)
-
-* Retain ``release_conn`` state across retries. (Issues #651, #866)
-
-* Add customizable ``HTTPConnectionPool.ResponseCls``, which defaults to
-  ``HTTPResponse`` but can be replaced with a subclass. (Issue #879)
-
-
-1.15.1 (2016-04-11)
--------------------
-
-* Fix packaging to include backports module. (Issue #841)
-
-
-1.15 (2016-04-06)
------------------
-
-* Added Retry(raise_on_status=False). (Issue #720)
-
-* Always use setuptools, no more distutils fallback. (Issue #785)
-
-* Dropped support for Python 3.2. (Issue #786)
-
-* Chunked transfer encoding when requesting with ``chunked=True``.
-  (Issue #790)
-
-* Fixed regression with IPv6 port parsing. (Issue #801)
-
-* Append SNIMissingWarning messages to allow users to specify it in
-  the PYTHONWARNINGS environment variable. (Issue #816)
-
-* Handle unicode headers in Py2. (Issue #818)
-
-* Log certificate when there is a hostname mismatch. (Issue #820)
-
-* Preserve order of request/response headers. (Issue #821)
-
-
-1.14 (2015-12-29)
------------------
-
-* contrib: SOCKS proxy support! (Issue #762)
-
-* Fixed AppEngine handling of transfer-encoding header and bug
-  in Timeout defaults checking. (Issue #763)
-
-
-1.13.1 (2015-12-18)
--------------------
-
-* Fixed regression in IPv6 + SSL for match_hostname. (Issue #761)
-
-
-1.13 (2015-12-14)
------------------
-
-* Fixed ``pip install urllib3[secure]`` on modern pip. (Issue #706)
-
-* pyopenssl: Fixed SSL3_WRITE_PENDING error. (Issue #717)
-
-* pyopenssl: Support for TLSv1.1 and TLSv1.2. (Issue #696)
-
-* Close connections more defensively on exception. (Issue #734)
-
-* Adjusted ``read_chunked`` to handle gzipped, chunk-encoded bodies without
-  repeatedly flushing the decoder, to function better on Jython. (Issue #743)
-
-* Accept ``ca_cert_dir`` for SSL-related PoolManager configuration. (Issue #758)
-
-
-1.12 (2015-09-03)
------------------
-
-* Rely on ``six`` for importing ``httplib`` to work around
-  conflicts with other Python 3 shims. (Issue #688)
-
-* Add support for directories of certificate authorities, as supported by
-  OpenSSL. (Issue #701)
-
-* New exception: ``NewConnectionError``, raised when we fail to establish
-  a new connection, usually ``ECONNREFUSED`` socket error.
-
-
-1.11 (2015-07-21)
------------------
-
-* When ``ca_certs`` is given, ``cert_reqs`` defaults to
-  ``'CERT_REQUIRED'``. (Issue #650)
-
-* ``pip install urllib3[secure]`` will install Certifi and
-  PyOpenSSL as dependencies. (Issue #678)
-
-* Made ``HTTPHeaderDict`` usable as a ``headers`` input value
-  (Issues #632, #679)
-
-* Added `urllib3.contrib.appengine <https://urllib3.readthedocs.io/en/latest/contrib.html#google-app-engine>`_
-  which has an ``AppEngineManager`` for using ``URLFetch`` in a
-  Google AppEngine environment. (Issue #664)
-
-* Dev: Added test suite for AppEngine. (Issue #631)
-
-* Fix performance regression when using PyOpenSSL. (Issue #626)
-
-* Passing incorrect scheme (e.g. ``foo://``) will raise
-  ``ValueError`` instead of ``AssertionError`` (backwards
-  compatible for now, but please migrate). (Issue #640)
-
-* Fix pools not getting replenished when an error occurs during a
-  request using ``release_conn=False``. (Issue #644)
-
-* Fix pool-default headers not applying for url-encoded requests
-  like GET. (Issue #657)
-
-* log.warning in Python 3 when headers are skipped due to parsing
-  errors. (Issue #642)
-
-* Close and discard connections if an error occurs during read.
-  (Issue #660)
-
-* Fix host parsing for IPv6 proxies. (Issue #668)
-
-* Separate warning type SubjectAltNameWarning, now issued once
-  per host. (Issue #671)
-
-* Fix ``httplib.IncompleteRead`` not getting converted to
-  ``ProtocolError`` when using ``HTTPResponse.stream()``
-  (Issue #674)
-
-1.10.4 (2015-05-03)
--------------------
-
-* Migrate tests to Tornado 4. (Issue #594)
-
-* Append default warning configuration rather than overwrite.
-  (Issue #603)
-
-* Fix streaming decoding regression. (Issue #595)
-
-* Fix chunked requests losing state across keep-alive connections.
-  (Issue #599)
-
-* Fix hanging when chunked HEAD response has no body. (Issue #605)
-
-
-1.10.3 (2015-04-21)
--------------------
-
-* Emit ``InsecurePlatformWarning`` when SSLContext object is missing.
-  (Issue #558)
-
-* Fix regression of duplicate header keys being discarded.
-  (Issue #563)
-
-* ``Response.stream()`` returns a generator for chunked responses.
-  (Issue #560)
-
-* Set upper-bound timeout when waiting for a socket in PyOpenSSL.
-  (Issue #585)
-
-* Work on platforms without `ssl` module for plain HTTP requests.
-  (Issue #587)
-
-* Stop relying on the stdlib's default cipher list. (Issue #588)
-
-
-1.10.2 (2015-02-25)
--------------------
-
-* Fix file descriptor leakage on retries. (Issue #548)
-
-* Removed RC4 from default cipher list. (Issue #551)
-
-* Header performance improvements. (Issue #544)
-
-* Fix PoolManager not obeying redirect retry settings. (Issue #553)
-
-
-1.10.1 (2015-02-10)
--------------------
-
-* Pools can be used as context managers. (Issue #545)
-
-* Don't re-use connections which experienced an SSLError. (Issue #529)
-
-* Don't fail when gzip decoding an empty stream. (Issue #535)
-
-* Add sha256 support for fingerprint verification. (Issue #540)
-
-* Fixed handling of header values containing commas. (Issue #533)
-
-
-1.10 (2014-12-14)
------------------
-
-* Disabled SSLv3. (Issue #473)
-
-* Add ``Url.url`` property to return the composed url string. (Issue #394)
-
-* Fixed PyOpenSSL + gevent ``WantWriteError``. (Issue #412)
-
-* ``MaxRetryError.reason`` will always be an exception, not string.
-  (Issue #481)
-
-* Fixed SSL-related timeouts not being detected as timeouts. (Issue #492)
-
-* Py3: Use ``ssl.create_default_context()`` when available. (Issue #473)
-
-* Emit ``InsecureRequestWarning`` for *every* insecure HTTPS request.
-  (Issue #496)
-
-* Emit ``SecurityWarning`` when certificate has no ``subjectAltName``.
-  (Issue #499)
-
-* Close and discard sockets which experienced SSL-related errors.
-  (Issue #501)
-
-* Handle ``body`` param in ``.request(...)``. (Issue #513)
-
-* Respect timeout with HTTPS proxy. (Issue #505)
-
-* PyOpenSSL: Handle ZeroReturnError exception. (Issue #520)
-
-
-1.9.1 (2014-09-13)
-------------------
-
-* Apply socket arguments before binding. (Issue #427)
-
-* More careful checks if fp-like object is closed. (Issue #435)
-
-* Fixed packaging issues of some development-related files not
-  getting included. (Issue #440)
-
-* Allow performing *only* fingerprint verification. (Issue #444)
-
-* Emit ``SecurityWarning`` if system clock is waaay off. (Issue #445)
-
-* Fixed PyOpenSSL compatibility with PyPy. (Issue #450)
-
-* Fixed ``BrokenPipeError`` and ``ConnectionError`` handling in Py3.
-  (Issue #443)
-
-
-
-1.9 (2014-07-04)
-----------------
-
-* Shuffled around development-related files. If you're maintaining a distro
-  package of urllib3, you may need to tweak things. (Issue #415)
-
-* Unverified HTTPS requests will trigger a warning on the first request. See
-  our new `security documentation
-  <https://urllib3.readthedocs.io/en/latest/security.html>`_ for details.
-  (Issue #426)
-
-* New retry logic and ``urllib3.util.retry.Retry`` configuration object.
-  (Issue #326)
-
-* All raised exceptions should now wrapped in a
-  ``urllib3.exceptions.HTTPException``-extending exception. (Issue #326)
-
-* All errors during a retry-enabled request should be wrapped in
-  ``urllib3.exceptions.MaxRetryError``, including timeout-related exceptions
-  which were previously exempt. Underlying error is accessible from the
-  ``.reason`` property. (Issue #326)
-
-* ``urllib3.exceptions.ConnectionError`` renamed to
-  ``urllib3.exceptions.ProtocolError``. (Issue #326)
-
-* Errors during response read (such as IncompleteRead) are now wrapped in
-  ``urllib3.exceptions.ProtocolError``. (Issue #418)
-
-* Requesting an empty host will raise ``urllib3.exceptions.LocationValueError``.
-  (Issue #417)
-
-* Catch read timeouts over SSL connections as
-  ``urllib3.exceptions.ReadTimeoutError``. (Issue #419)
-
-* Apply socket arguments before connecting. (Issue #427)
-
-
-1.8.3 (2014-06-23)
-------------------
-
-* Fix TLS verification when using a proxy in Python 3.4.1. (Issue #385)
-
-* Add ``disable_cache`` option to ``urllib3.util.make_headers``. (Issue #393)
-
-* Wrap ``socket.timeout`` exception with
-  ``urllib3.exceptions.ReadTimeoutError``. (Issue #399)
-
-* Fixed proxy-related bug where connections were being reused incorrectly.
-  (Issues #366, #369)
-
-* Added ``socket_options`` keyword parameter which allows to define
-  ``setsockopt`` configuration of new sockets. (Issue #397)
-
-* Removed ``HTTPConnection.tcp_nodelay`` in favor of
-  ``HTTPConnection.default_socket_options``. (Issue #397)
-
-* Fixed ``TypeError`` bug in Python 2.6.4. (Issue #411)
-
-
-1.8.2 (2014-04-17)
-------------------
-
-* Fix ``urllib3.util`` not being included in the package.
-
-
-1.8.1 (2014-04-17)
-------------------
-
-* Fix AppEngine bug of HTTPS requests going out as HTTP. (Issue #356)
-
-* Don't install ``dummyserver`` into ``site-packages`` as it's only needed
-  for the test suite. (Issue #362)
-
-* Added support for specifying ``source_address``. (Issue #352)
-
-
-1.8 (2014-03-04)
-----------------
-
-* Improved url parsing in ``urllib3.util.parse_url`` (properly parse '@' in
-  username, and blank ports like 'hostname:').
-
-* New ``urllib3.connection`` module which contains all the HTTPConnection
-  objects.
-
-* Several ``urllib3.util.Timeout``-related fixes. Also changed constructor
-  signature to a more sensible order. [Backwards incompatible]
-  (Issues #252, #262, #263)
-
-* Use ``backports.ssl_match_hostname`` if it's installed. (Issue #274)
-
-* Added ``.tell()`` method to ``urllib3.response.HTTPResponse`` which
-  returns the number of bytes read so far. (Issue #277)
-
-* Support for platforms without threading. (Issue #289)
-
-* Expand default-port comparison in ``HTTPConnectionPool.is_same_host``
-  to allow a pool with no specified port to be considered equal to to an
-  HTTP/HTTPS url with port 80/443 explicitly provided. (Issue #305)
-
-* Improved default SSL/TLS settings to avoid vulnerabilities.
-  (Issue #309)
-
-* Fixed ``urllib3.poolmanager.ProxyManager`` not retrying on connect errors.
-  (Issue #310)
-
-* Disable Nagle's Algorithm on the socket for non-proxies. A subset of requests
-  will send the entire HTTP request ~200 milliseconds faster; however, some of
-  the resulting TCP packets will be smaller. (Issue #254)
-
-* Increased maximum number of SubjectAltNames in ``urllib3.contrib.pyopenssl``
-  from the default 64 to 1024 in a single certificate. (Issue #318)
-
-* Headers are now passed and stored as a custom
-  ``urllib3.collections_.HTTPHeaderDict`` object rather than a plain ``dict``.
-  (Issue #329, #333)
-
-* Headers no longer lose their case on Python 3. (Issue #236)
-
-* ``urllib3.contrib.pyopenssl`` now uses the operating system's default CA
-  certificates on inject. (Issue #332)
-
-* Requests with ``retries=False`` will immediately raise any exceptions without
-  wrapping them in ``MaxRetryError``. (Issue #348)
-
-* Fixed open socket leak with SSL-related failures. (Issue #344, #348)
-
-
-1.7.1 (2013-09-25)
-------------------
-
-* Added granular timeout support with new ``urllib3.util.Timeout`` class.
-  (Issue #231)
-
-* Fixed Python 3.4 support. (Issue #238)
-
-
-1.7 (2013-08-14)
-----------------
-
-* More exceptions are now pickle-able, with tests. (Issue #174)
-
-* Fixed redirecting with relative URLs in Location header. (Issue #178)
-
-* Support for relative urls in ``Location: ...`` header. (Issue #179)
-
-* ``urllib3.response.HTTPResponse`` now inherits from ``io.IOBase`` for bonus
-  file-like functionality. (Issue #187)
-
-* Passing ``assert_hostname=False`` when creating a HTTPSConnectionPool will
-  skip hostname verification for SSL connections. (Issue #194)
-
-* New method ``urllib3.response.HTTPResponse.stream(...)`` which acts as a
-  generator wrapped around ``.read(...)``. (Issue #198)
-
-* IPv6 url parsing enforces brackets around the hostname. (Issue #199)
-
-* Fixed thread race condition in
-  ``urllib3.poolmanager.PoolManager.connection_from_host(...)`` (Issue #204)
-
-* ``ProxyManager`` requests now include non-default port in ``Host: ...``
-  header. (Issue #217)
-
-* Added HTTPS proxy support in ``ProxyManager``. (Issue #170 #139)
-
-* New ``RequestField`` object can be passed to the ``fields=...`` param which
-  can specify headers. (Issue #220)
-
-* Raise ``urllib3.exceptions.ProxyError`` when connecting to proxy fails.
-  (Issue #221)
-
-* Use international headers when posting file names. (Issue #119)
-
-* Improved IPv6 support. (Issue #203)
-
-
-1.6 (2013-04-25)
-----------------
-
-* Contrib: Optional SNI support for Py2 using PyOpenSSL. (Issue #156)
-
-* ``ProxyManager`` automatically adds ``Host: ...`` header if not given.
-
-* Improved SSL-related code. ``cert_req`` now optionally takes a string like
-  "REQUIRED" or "NONE". Same with ``ssl_version`` takes strings like "SSLv23"
-  The string values reflect the suffix of the respective constant variable.
-  (Issue #130)
-
-* Vendored ``socksipy`` now based on Anorov's fork which handles unexpectedly
-  closed proxy connections and larger read buffers. (Issue #135)
-
-* Ensure the connection is closed if no data is received, fixes connection leak
-  on some platforms. (Issue #133)
-
-* Added SNI support for SSL/TLS connections on Py32+. (Issue #89)
-
-* Tests fixed to be compatible with Py26 again. (Issue #125)
-
-* Added ability to choose SSL version by passing an ``ssl.PROTOCOL_*`` constant
-  to the ``ssl_version`` parameter of ``HTTPSConnectionPool``. (Issue #109)
-
-* Allow an explicit content type to be specified when encoding file fields.
-  (Issue #126)
-
-* Exceptions are now pickleable, with tests. (Issue #101)
-
-* Fixed default headers not getting passed in some cases. (Issue #99)
-
-* Treat "content-encoding" header value as case-insensitive, per RFC 2616
-  Section 3.5. (Issue #110)
-
-* "Connection Refused" SocketErrors will get retried rather than raised.
-  (Issue #92)
-
-* Updated vendored ``six``, no longer overrides the global ``six`` module
-  namespace. (Issue #113)
-
-* ``urllib3.exceptions.MaxRetryError`` contains a ``reason`` property holding
-  the exception that prompted the final retry. If ``reason is None`` then it
-  was due to a redirect. (Issue #92, #114)
-
-* Fixed ``PoolManager.urlopen()`` from not redirecting more than once.
-  (Issue #149)
-
-* Don't assume ``Content-Type: text/plain`` for multi-part encoding parameters
-  that are not files. (Issue #111)
-
-* Pass `strict` param down to ``httplib.HTTPConnection``. (Issue #122)
-
-* Added mechanism to verify SSL certificates by fingerprint (md5, sha1) or
-  against an arbitrary hostname (when connecting by IP or for misconfigured
-  servers). (Issue #140)
-
-* Streaming decompression support. (Issue #159)
-
-
-1.5 (2012-08-02)
-----------------
-
-* Added ``urllib3.add_stderr_logger()`` for quickly enabling STDERR debug
-  logging in urllib3.
-
-* Native full URL parsing (including auth, path, query, fragment) available in
-  ``urllib3.util.parse_url(url)``.
-
-* Built-in redirect will switch method to 'GET' if status code is 303.
-  (Issue #11)
-
-* ``urllib3.PoolManager`` strips the scheme and host before sending the request
-  uri. (Issue #8)
-
-* New ``urllib3.exceptions.DecodeError`` exception for when automatic decoding,
-  based on the Content-Type header, fails.
-
-* Fixed bug with pool depletion and leaking connections (Issue #76). Added
-  explicit connection closing on pool eviction. Added
-  ``urllib3.PoolManager.clear()``.
-
-* 99% -> 100% unit test coverage.
-
-
-1.4 (2012-06-16)
-----------------
-
-* Minor AppEngine-related fixes.
-
-* Switched from ``mimetools.choose_boundary`` to ``uuid.uuid4()``.
-
-* Improved url parsing. (Issue #73)
-
-* IPv6 url support. (Issue #72)
-
-
-1.3 (2012-03-25)
-----------------
-
-* Removed pre-1.0 deprecated API.
-
-* Refactored helpers into a ``urllib3.util`` submodule.
-
-* Fixed multipart encoding to support list-of-tuples for keys with multiple
-  values. (Issue #48)
-
-* Fixed multiple Set-Cookie headers in response not getting merged properly in
-  Python 3. (Issue #53)
-
-* AppEngine support with Py27. (Issue #61)
-
-* Minor ``encode_multipart_formdata`` fixes related to Python 3 strings vs
-  bytes.
-
-
-1.2.2 (2012-02-06)
-------------------
-
-* Fixed packaging bug of not shipping ``test-requirements.txt``. (Issue #47)
-
-
-1.2.1 (2012-02-05)
-------------------
-
-* Fixed another bug related to when ``ssl`` module is not available. (Issue #41)
-
-* Location parsing errors now raise ``urllib3.exceptions.LocationParseError``
-  which inherits from ``ValueError``.
-
-
-1.2 (2012-01-29)
-----------------
-
-* Added Python 3 support (tested on 3.2.2)
-
-* Dropped Python 2.5 support (tested on 2.6.7, 2.7.2)
-
-* Use ``select.poll`` instead of ``select.select`` for platforms that support
-  it.
-
-* Use ``Queue.LifoQueue`` instead of ``Queue.Queue`` for more aggressive
-  connection reusing. Configurable by overriding ``ConnectionPool.QueueCls``.
-
-* Fixed ``ImportError`` during install when ``ssl`` module is not available.
-  (Issue #41)
-
-* Fixed ``PoolManager`` redirects between schemes (such as HTTP -> HTTPS) not
-  completing properly. (Issue #28, uncovered by Issue #10 in v1.1)
-
-* Ported ``dummyserver`` to use ``tornado`` instead of ``webob`` +
-  ``eventlet``. Removed extraneous unsupported dummyserver testing backends.
-  Added socket-level tests.
-
-* More tests. Achievement Unlocked: 99% Coverage.
-
-
-1.1 (2012-01-07)
-----------------
-
-* Refactored ``dummyserver`` to its own root namespace module (used for
-  testing).
-
-* Added hostname verification for ``VerifiedHTTPSConnection`` by vendoring in
-  Py32's ``ssl_match_hostname``. (Issue #25)
-
-* Fixed cross-host HTTP redirects when using ``PoolManager``. (Issue #10)
-
-* Fixed ``decode_content`` being ignored when set through ``urlopen``. (Issue
-  #27)
-
-* Fixed timeout-related bugs. (Issues #17, #23)
-
-
-1.0.2 (2011-11-04)
-------------------
-
-* Fixed typo in ``VerifiedHTTPSConnection`` which would only present as a bug if
-  you're using the object manually. (Thanks pyos)
-
-* Made RecentlyUsedContainer (and consequently PoolManager) more thread-safe by
-  wrapping the access log in a mutex. (Thanks @christer)
-
-* Made RecentlyUsedContainer more dict-like (corrected ``__delitem__`` and
-  ``__getitem__`` behaviour), with tests. Shouldn't affect core urllib3 code.
-
-
-1.0.1 (2011-10-10)
-------------------
-
-* Fixed a bug where the same connection would get returned into the pool twice,
-  causing extraneous "HttpConnectionPool is full" log warnings.
-
-
-1.0 (2011-10-08)
-----------------
-
-* Added ``PoolManager`` with LRU expiration of connections (tested and
-  documented).
-* Added ``ProxyManager`` (needs tests, docs, and confirmation that it works
-  with HTTPS proxies).
-* Added optional partial-read support for responses when
-  ``preload_content=False``. You can now make requests and just read the headers
-  without loading the content.
-* Made response decoding optional (default on, same as before).
-* Added optional explicit boundary string for ``encode_multipart_formdata``.
-* Convenience request methods are now inherited from ``RequestMethods``. Old
-  helpers like ``get_url`` and ``post_url`` should be abandoned in favour of
-  the new ``request(method, url, ...)``.
-* Refactored code to be even more decoupled, reusable, and extendable.
-* License header added to ``.py`` files.
-* Embiggened the documentation: Lots of Sphinx-friendly docstrings in the code
-  and docs in ``docs/`` and on https://urllib3.readthedocs.io/.
-* Embettered all the things!
-* Started writing this file.
-
-
-0.4.1 (2011-07-17)
-------------------
-
-* Minor bug fixes, code cleanup.
-
-
-0.4 (2011-03-01)
-----------------
-
-* Better unicode support.
-* Added ``VerifiedHTTPSConnection``.
-* Added ``NTLMConnectionPool`` in contrib.
-* Minor improvements.
-
-
-0.3.1 (2010-07-13)
-------------------
-
-* Added ``assert_host_name`` optional parameter. Now compatible with proxies.
-
-
-0.3 (2009-12-10)
-----------------
-
-* Added HTTPS support.
-* Minor bug fixes.
-* Refactored, broken backwards compatibility with 0.2.
-* API to be treated as stable from this version forward.
-
-
-0.2 (2008-11-17)
-----------------
-
-* Added unit tests.
-* Bug fixes.
-
-
-0.1 (2008-11-16)
-----------------
-
-* First release.
-
-
diff --git a/venv/lib/python3.7/site-packages/urllib3-1.25.7.dist-info/RECORD b/venv/lib/python3.7/site-packages/urllib3-1.25.7.dist-info/RECORD
deleted file mode 100644
index 4fb24fc..0000000
--- a/venv/lib/python3.7/site-packages/urllib3-1.25.7.dist-info/RECORD
+++ /dev/null
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-urllib3/packages/ssl_match_hostname/__pycache__/__init__.cpython-37.pyc,,
-urllib3/packages/ssl_match_hostname/__pycache__/_implementation.cpython-37.pyc,,
-urllib3/packages/ssl_match_hostname/_implementation.py,sha256=6dZ-q074g7XhsJ27MFCgkct8iVNZB3sMZvKhf-KUVy0,5679
-urllib3/poolmanager.py,sha256=JYUyBUN3IiEknUdjZ7VJrpCQr6SP7vi0WwSndrn8XpE,17053
-urllib3/request.py,sha256=hhoHvEEatyd9Tn5EbGjQ0emn-ENMCyY591yNWTneINA,6018
-urllib3/response.py,sha256=O2DVzBeWOzyxZDZ8k0EDFU3GW1jWXk_b03mS0O1ybxs,27836
-urllib3/util/__init__.py,sha256=bWNaav_OT-1L7-sxm59cGb59rDORlbhb_4noduM5m0U,1038
-urllib3/util/__pycache__/__init__.cpython-37.pyc,,
-urllib3/util/__pycache__/connection.cpython-37.pyc,,
-urllib3/util/__pycache__/queue.cpython-37.pyc,,
-urllib3/util/__pycache__/request.cpython-37.pyc,,
-urllib3/util/__pycache__/response.cpython-37.pyc,,
-urllib3/util/__pycache__/retry.cpython-37.pyc,,
-urllib3/util/__pycache__/ssl_.cpython-37.pyc,,
-urllib3/util/__pycache__/timeout.cpython-37.pyc,,
-urllib3/util/__pycache__/url.cpython-37.pyc,,
-urllib3/util/__pycache__/wait.cpython-37.pyc,,
-urllib3/util/connection.py,sha256=NsxUAKQ98GKywta--zg57CdVpeTCI6N-GElCq78Dl8U,4637
-urllib3/util/queue.py,sha256=myTX3JDHntglKQNBf3b6dasHH-uF-W59vzGSQiFdAfI,497
-urllib3/util/request.py,sha256=C-6-AWffxZG03AdRGoY59uqsn4CVItKU6gjxz7Hc3Mc,3815
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-urllib3/util/ssl_.py,sha256=engc91JD3PYAEPdoqdDnMnWtUT549Ma2nNTWJiAWRtc,14151
-urllib3/util/timeout.py,sha256=bCtaS_xVKaTDJ5VMlroXBfCnPUDNVGZqik7-z83issg,9871
-urllib3/util/url.py,sha256=P0jDIHCnMJb4x1qILZYnn3hkcxOSWYrDtvzjiC_d218,14096
-urllib3/util/wait.py,sha256=k46KzqIYu3Vnzla5YW3EvtInNlU_QycFqQAghIOxoAg,5406
diff --git a/venv/lib/python3.7/site-packages/urllib3-1.25.7.dist-info/WHEEL b/venv/lib/python3.7/site-packages/urllib3-1.25.7.dist-info/WHEEL
deleted file mode 100644
index 8b701e9..0000000
--- a/venv/lib/python3.7/site-packages/urllib3-1.25.7.dist-info/WHEEL
+++ /dev/null
@@ -1,6 +0,0 @@
-Wheel-Version: 1.0
-Generator: bdist_wheel (0.33.6)
-Root-Is-Purelib: true
-Tag: py2-none-any
-Tag: py3-none-any
-
diff --git a/venv/lib/python3.7/site-packages/urllib3-1.25.7.dist-info/top_level.txt b/venv/lib/python3.7/site-packages/urllib3-1.25.7.dist-info/top_level.txt
deleted file mode 100644
index a42590b..0000000
--- a/venv/lib/python3.7/site-packages/urllib3-1.25.7.dist-info/top_level.txt
+++ /dev/null
@@ -1 +0,0 @@
-urllib3
diff --git a/venv/lib/python3.7/site-packages/urllib3/__init__.py b/venv/lib/python3.7/site-packages/urllib3/__init__.py
deleted file mode 100644
index 96474d3..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/__init__.py
+++ /dev/null
@@ -1,86 +0,0 @@
-"""
-urllib3 - Thread-safe connection pooling and re-using.
-"""
-from __future__ import absolute_import
-import warnings
-
-from .connectionpool import HTTPConnectionPool, HTTPSConnectionPool, connection_from_url
-
-from . import exceptions
-from .filepost import encode_multipart_formdata
-from .poolmanager import PoolManager, ProxyManager, proxy_from_url
-from .response import HTTPResponse
-from .util.request import make_headers
-from .util.url import get_host
-from .util.timeout import Timeout
-from .util.retry import Retry
-
-
-# Set default logging handler to avoid "No handler found" warnings.
-import logging
-from logging import NullHandler
-
-__author__ = "Andrey Petrov (andrey.petrov@shazow.net)"
-__license__ = "MIT"
-__version__ = "1.25.7"
-
-__all__ = (
-    "HTTPConnectionPool",
-    "HTTPSConnectionPool",
-    "PoolManager",
-    "ProxyManager",
-    "HTTPResponse",
-    "Retry",
-    "Timeout",
-    "add_stderr_logger",
-    "connection_from_url",
-    "disable_warnings",
-    "encode_multipart_formdata",
-    "get_host",
-    "make_headers",
-    "proxy_from_url",
-)
-
-logging.getLogger(__name__).addHandler(NullHandler())
-
-
-def add_stderr_logger(level=logging.DEBUG):
-    """
-    Helper for quickly adding a StreamHandler to the logger. Useful for
-    debugging.
-
-    Returns the handler after adding it.
-    """
-    # This method needs to be in this __init__.py to get the __name__ correct
-    # even if urllib3 is vendored within another package.
-    logger = logging.getLogger(__name__)
-    handler = logging.StreamHandler()
-    handler.setFormatter(logging.Formatter("%(asctime)s %(levelname)s %(message)s"))
-    logger.addHandler(handler)
-    logger.setLevel(level)
-    logger.debug("Added a stderr logging handler to logger: %s", __name__)
-    return handler
-
-
-# ... Clean up.
-del NullHandler
-
-
-# All warning filters *must* be appended unless you're really certain that they
-# shouldn't be: otherwise, it's very hard for users to use most Python
-# mechanisms to silence them.
-# SecurityWarning's always go off by default.
-warnings.simplefilter("always", exceptions.SecurityWarning, append=True)
-# SubjectAltNameWarning's should go off once per host
-warnings.simplefilter("default", exceptions.SubjectAltNameWarning, append=True)
-# InsecurePlatformWarning's don't vary between requests, so we keep it default.
-warnings.simplefilter("default", exceptions.InsecurePlatformWarning, append=True)
-# SNIMissingWarnings should go off only once.
-warnings.simplefilter("default", exceptions.SNIMissingWarning, append=True)
-
-
-def disable_warnings(category=exceptions.HTTPWarning):
-    """
-    Helper for quickly disabling all urllib3 warnings.
-    """
-    warnings.simplefilter("ignore", category)
diff --git a/venv/lib/python3.7/site-packages/urllib3/_collections.py b/venv/lib/python3.7/site-packages/urllib3/_collections.py
deleted file mode 100644
index 019d151..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/_collections.py
+++ /dev/null
@@ -1,336 +0,0 @@
-from __future__ import absolute_import
-
-try:
-    from collections.abc import Mapping, MutableMapping
-except ImportError:
-    from collections import Mapping, MutableMapping
-try:
-    from threading import RLock
-except ImportError:  # Platform-specific: No threads available
-
-    class RLock:
-        def __enter__(self):
-            pass
-
-        def __exit__(self, exc_type, exc_value, traceback):
-            pass
-
-
-from collections import OrderedDict
-from .exceptions import InvalidHeader
-from .packages.six import iterkeys, itervalues, PY3
-
-
-__all__ = ["RecentlyUsedContainer", "HTTPHeaderDict"]
-
-
-_Null = object()
-
-
-class RecentlyUsedContainer(MutableMapping):
-    """
-    Provides a thread-safe dict-like container which maintains up to
-    ``maxsize`` keys while throwing away the least-recently-used keys beyond
-    ``maxsize``.
-
-    :param maxsize:
-        Maximum number of recent elements to retain.
-
-    :param dispose_func:
-        Every time an item is evicted from the container,
-        ``dispose_func(value)`` is called.  Callback which will get called
-    """
-
-    ContainerCls = OrderedDict
-
-    def __init__(self, maxsize=10, dispose_func=None):
-        self._maxsize = maxsize
-        self.dispose_func = dispose_func
-
-        self._container = self.ContainerCls()
-        self.lock = RLock()
-
-    def __getitem__(self, key):
-        # Re-insert the item, moving it to the end of the eviction line.
-        with self.lock:
-            item = self._container.pop(key)
-            self._container[key] = item
-            return item
-
-    def __setitem__(self, key, value):
-        evicted_value = _Null
-        with self.lock:
-            # Possibly evict the existing value of 'key'
-            evicted_value = self._container.get(key, _Null)
-            self._container[key] = value
-
-            # If we didn't evict an existing value, we might have to evict the
-            # least recently used item from the beginning of the container.
-            if len(self._container) > self._maxsize:
-                _key, evicted_value = self._container.popitem(last=False)
-
-        if self.dispose_func and evicted_value is not _Null:
-            self.dispose_func(evicted_value)
-
-    def __delitem__(self, key):
-        with self.lock:
-            value = self._container.pop(key)
-
-        if self.dispose_func:
-            self.dispose_func(value)
-
-    def __len__(self):
-        with self.lock:
-            return len(self._container)
-
-    def __iter__(self):
-        raise NotImplementedError(
-            "Iteration over this class is unlikely to be threadsafe."
-        )
-
-    def clear(self):
-        with self.lock:
-            # Copy pointers to all values, then wipe the mapping
-            values = list(itervalues(self._container))
-            self._container.clear()
-
-        if self.dispose_func:
-            for value in values:
-                self.dispose_func(value)
-
-    def keys(self):
-        with self.lock:
-            return list(iterkeys(self._container))
-
-
-class HTTPHeaderDict(MutableMapping):
-    """
-    :param headers:
-        An iterable of field-value pairs. Must not contain multiple field names
-        when compared case-insensitively.
-
-    :param kwargs:
-        Additional field-value pairs to pass in to ``dict.update``.
-
-    A ``dict`` like container for storing HTTP Headers.
-
-    Field names are stored and compared case-insensitively in compliance with
-    RFC 7230. Iteration provides the first case-sensitive key seen for each
-    case-insensitive pair.
-
-    Using ``__setitem__`` syntax overwrites fields that compare equal
-    case-insensitively in order to maintain ``dict``'s api. For fields that
-    compare equal, instead create a new ``HTTPHeaderDict`` and use ``.add``
-    in a loop.
-
-    If multiple fields that are equal case-insensitively are passed to the
-    constructor or ``.update``, the behavior is undefined and some will be
-    lost.
-
-    >>> headers = HTTPHeaderDict()
-    >>> headers.add('Set-Cookie', 'foo=bar')
-    >>> headers.add('set-cookie', 'baz=quxx')
-    >>> headers['content-length'] = '7'
-    >>> headers['SET-cookie']
-    'foo=bar, baz=quxx'
-    >>> headers['Content-Length']
-    '7'
-    """
-
-    def __init__(self, headers=None, **kwargs):
-        super(HTTPHeaderDict, self).__init__()
-        self._container = OrderedDict()
-        if headers is not None:
-            if isinstance(headers, HTTPHeaderDict):
-                self._copy_from(headers)
-            else:
-                self.extend(headers)
-        if kwargs:
-            self.extend(kwargs)
-
-    def __setitem__(self, key, val):
-        self._container[key.lower()] = [key, val]
-        return self._container[key.lower()]
-
-    def __getitem__(self, key):
-        val = self._container[key.lower()]
-        return ", ".join(val[1:])
-
-    def __delitem__(self, key):
-        del self._container[key.lower()]
-
-    def __contains__(self, key):
-        return key.lower() in self._container
-
-    def __eq__(self, other):
-        if not isinstance(other, Mapping) and not hasattr(other, "keys"):
-            return False
-        if not isinstance(other, type(self)):
-            other = type(self)(other)
-        return dict((k.lower(), v) for k, v in self.itermerged()) == dict(
-            (k.lower(), v) for k, v in other.itermerged()
-        )
-
-    def __ne__(self, other):
-        return not self.__eq__(other)
-
-    if not PY3:  # Python 2
-        iterkeys = MutableMapping.iterkeys
-        itervalues = MutableMapping.itervalues
-
-    __marker = object()
-
-    def __len__(self):
-        return len(self._container)
-
-    def __iter__(self):
-        # Only provide the originally cased names
-        for vals in self._container.values():
-            yield vals[0]
-
-    def pop(self, key, default=__marker):
-        """D.pop(k[,d]) -> v, remove specified key and return the corresponding value.
-          If key is not found, d is returned if given, otherwise KeyError is raised.
-        """
-        # Using the MutableMapping function directly fails due to the private marker.
-        # Using ordinary dict.pop would expose the internal structures.
-        # So let's reinvent the wheel.
-        try:
-            value = self[key]
-        except KeyError:
-            if default is self.__marker:
-                raise
-            return default
-        else:
-            del self[key]
-            return value
-
-    def discard(self, key):
-        try:
-            del self[key]
-        except KeyError:
-            pass
-
-    def add(self, key, val):
-        """Adds a (name, value) pair, doesn't overwrite the value if it already
-        exists.
-
-        >>> headers = HTTPHeaderDict(foo='bar')
-        >>> headers.add('Foo', 'baz')
-        >>> headers['foo']
-        'bar, baz'
-        """
-        key_lower = key.lower()
-        new_vals = [key, val]
-        # Keep the common case aka no item present as fast as possible
-        vals = self._container.setdefault(key_lower, new_vals)
-        if new_vals is not vals:
-            vals.append(val)
-
-    def extend(self, *args, **kwargs):
-        """Generic import function for any type of header-like object.
-        Adapted version of MutableMapping.update in order to insert items
-        with self.add instead of self.__setitem__
-        """
-        if len(args) > 1:
-            raise TypeError(
-                "extend() takes at most 1 positional "
-                "arguments ({0} given)".format(len(args))
-            )
-        other = args[0] if len(args) >= 1 else ()
-
-        if isinstance(other, HTTPHeaderDict):
-            for key, val in other.iteritems():
-                self.add(key, val)
-        elif isinstance(other, Mapping):
-            for key in other:
-                self.add(key, other[key])
-        elif hasattr(other, "keys"):
-            for key in other.keys():
-                self.add(key, other[key])
-        else:
-            for key, value in other:
-                self.add(key, value)
-
-        for key, value in kwargs.items():
-            self.add(key, value)
-
-    def getlist(self, key, default=__marker):
-        """Returns a list of all the values for the named field. Returns an
-        empty list if the key doesn't exist."""
-        try:
-            vals = self._container[key.lower()]
-        except KeyError:
-            if default is self.__marker:
-                return []
-            return default
-        else:
-            return vals[1:]
-
-    # Backwards compatibility for httplib
-    getheaders = getlist
-    getallmatchingheaders = getlist
-    iget = getlist
-
-    # Backwards compatibility for http.cookiejar
-    get_all = getlist
-
-    def __repr__(self):
-        return "%s(%s)" % (type(self).__name__, dict(self.itermerged()))
-
-    def _copy_from(self, other):
-        for key in other:
-            val = other.getlist(key)
-            if isinstance(val, list):
-                # Don't need to convert tuples
-                val = list(val)
-            self._container[key.lower()] = [key] + val
-
-    def copy(self):
-        clone = type(self)()
-        clone._copy_from(self)
-        return clone
-
-    def iteritems(self):
-        """Iterate over all header lines, including duplicate ones."""
-        for key in self:
-            vals = self._container[key.lower()]
-            for val in vals[1:]:
-                yield vals[0], val
-
-    def itermerged(self):
-        """Iterate over all headers, merging duplicate ones together."""
-        for key in self:
-            val = self._container[key.lower()]
-            yield val[0], ", ".join(val[1:])
-
-    def items(self):
-        return list(self.iteritems())
-
-    @classmethod
-    def from_httplib(cls, message):  # Python 2
-        """Read headers from a Python 2 httplib message object."""
-        # python2.7 does not expose a proper API for exporting multiheaders
-        # efficiently. This function re-reads raw lines from the message
-        # object and extracts the multiheaders properly.
-        obs_fold_continued_leaders = (" ", "\t")
-        headers = []
-
-        for line in message.headers:
-            if line.startswith(obs_fold_continued_leaders):
-                if not headers:
-                    # We received a header line that starts with OWS as described
-                    # in RFC-7230 S3.2.4. This indicates a multiline header, but
-                    # there exists no previous header to which we can attach it.
-                    raise InvalidHeader(
-                        "Header continuation with no previous header: %s" % line
-                    )
-                else:
-                    key, value = headers[-1]
-                    headers[-1] = (key, value + " " + line.strip())
-                    continue
-
-            key, value = line.split(":", 1)
-            headers.append((key, value.strip()))
-
-        return cls(headers)
diff --git a/venv/lib/python3.7/site-packages/urllib3/connection.py b/venv/lib/python3.7/site-packages/urllib3/connection.py
deleted file mode 100644
index f5c946a..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/connection.py
+++ /dev/null
@@ -1,448 +0,0 @@
-from __future__ import absolute_import
-import datetime
-import logging
-import os
-import socket
-from socket import error as SocketError, timeout as SocketTimeout
-import warnings
-from .packages import six
-from .packages.six.moves.http_client import HTTPConnection as _HTTPConnection
-from .packages.six.moves.http_client import HTTPException  # noqa: F401
-
-try:  # Compiled with SSL?
-    import ssl
-
-    BaseSSLError = ssl.SSLError
-except (ImportError, AttributeError):  # Platform-specific: No SSL.
-    ssl = None
-
-    class BaseSSLError(BaseException):
-        pass
-
-
-try:
-    # Python 3: not a no-op, we're adding this to the namespace so it can be imported.
-    ConnectionError = ConnectionError
-except NameError:
-    # Python 2
-    class ConnectionError(Exception):
-        pass
-
-
-from .exceptions import (
-    NewConnectionError,
-    ConnectTimeoutError,
-    SubjectAltNameWarning,
-    SystemTimeWarning,
-)
-from .packages.ssl_match_hostname import match_hostname, CertificateError
-
-from .util.ssl_ import (
-    resolve_cert_reqs,
-    resolve_ssl_version,
-    assert_fingerprint,
-    create_urllib3_context,
-    ssl_wrap_socket,
-)
-
-
-from .util import connection
-
-from ._collections import HTTPHeaderDict
-
-log = logging.getLogger(__name__)
-
-port_by_scheme = {"http": 80, "https": 443}
-
-# When it comes time to update this value as a part of regular maintenance
-# (ie test_recent_date is failing) update it to ~6 months before the current date.
-RECENT_DATE = datetime.date(2019, 1, 1)
-
-
-class DummyConnection(object):
-    """Used to detect a failed ConnectionCls import."""
-
-    pass
-
-
-class HTTPConnection(_HTTPConnection, object):
-    """
-    Based on httplib.HTTPConnection but provides an extra constructor
-    backwards-compatibility layer between older and newer Pythons.
-
-    Additional keyword parameters are used to configure attributes of the connection.
-    Accepted parameters include:
-
-      - ``strict``: See the documentation on :class:`urllib3.connectionpool.HTTPConnectionPool`
-      - ``source_address``: Set the source address for the current connection.
-      - ``socket_options``: Set specific options on the underlying socket. If not specified, then
-        defaults are loaded from ``HTTPConnection.default_socket_options`` which includes disabling
-        Nagle's algorithm (sets TCP_NODELAY to 1) unless the connection is behind a proxy.
-
-        For example, if you wish to enable TCP Keep Alive in addition to the defaults,
-        you might pass::
-
-            HTTPConnection.default_socket_options + [
-                (socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1),
-            ]
-
-        Or you may want to disable the defaults by passing an empty list (e.g., ``[]``).
-    """
-
-    default_port = port_by_scheme["http"]
-
-    #: Disable Nagle's algorithm by default.
-    #: ``[(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)]``
-    default_socket_options = [(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)]
-
-    #: Whether this connection verifies the host's certificate.
-    is_verified = False
-
-    def __init__(self, *args, **kw):
-        if not six.PY2:
-            kw.pop("strict", None)
-
-        # Pre-set source_address.
-        self.source_address = kw.get("source_address")
-
-        #: The socket options provided by the user. If no options are
-        #: provided, we use the default options.
-        self.socket_options = kw.pop("socket_options", self.default_socket_options)
-
-        _HTTPConnection.__init__(self, *args, **kw)
-
-    @property
-    def host(self):
-        """
-        Getter method to remove any trailing dots that indicate the hostname is an FQDN.
-
-        In general, SSL certificates don't include the trailing dot indicating a
-        fully-qualified domain name, and thus, they don't validate properly when
-        checked against a domain name that includes the dot. In addition, some
-        servers may not expect to receive the trailing dot when provided.
-
-        However, the hostname with trailing dot is critical to DNS resolution; doing a
-        lookup with the trailing dot will properly only resolve the appropriate FQDN,
-        whereas a lookup without a trailing dot will search the system's search domain
-        list. Thus, it's important to keep the original host around for use only in
-        those cases where it's appropriate (i.e., when doing DNS lookup to establish the
-        actual TCP connection across which we're going to send HTTP requests).
-        """
-        return self._dns_host.rstrip(".")
-
-    @host.setter
-    def host(self, value):
-        """
-        Setter for the `host` property.
-
-        We assume that only urllib3 uses the _dns_host attribute; httplib itself
-        only uses `host`, and it seems reasonable that other libraries follow suit.
-        """
-        self._dns_host = value
-
-    def _new_conn(self):
-        """ Establish a socket connection and set nodelay settings on it.
-
-        :return: New socket connection.
-        """
-        extra_kw = {}
-        if self.source_address:
-            extra_kw["source_address"] = self.source_address
-
-        if self.socket_options:
-            extra_kw["socket_options"] = self.socket_options
-
-        try:
-            conn = connection.create_connection(
-                (self._dns_host, self.port), self.timeout, **extra_kw
-            )
-
-        except SocketTimeout:
-            raise ConnectTimeoutError(
-                self,
-                "Connection to %s timed out. (connect timeout=%s)"
-                % (self.host, self.timeout),
-            )
-
-        except SocketError as e:
-            raise NewConnectionError(
-                self, "Failed to establish a new connection: %s" % e
-            )
-
-        return conn
-
-    def _prepare_conn(self, conn):
-        self.sock = conn
-        # Google App Engine's httplib does not define _tunnel_host
-        if getattr(self, "_tunnel_host", None):
-            # TODO: Fix tunnel so it doesn't depend on self.sock state.
-            self._tunnel()
-            # Mark this connection as not reusable
-            self.auto_open = 0
-
-    def connect(self):
-        conn = self._new_conn()
-        self._prepare_conn(conn)
-
-    def request_chunked(self, method, url, body=None, headers=None):
-        """
-        Alternative to the common request method, which sends the
-        body with chunked encoding and not as one block
-        """
-        headers = HTTPHeaderDict(headers if headers is not None else {})
-        skip_accept_encoding = "accept-encoding" in headers
-        skip_host = "host" in headers
-        self.putrequest(
-            method, url, skip_accept_encoding=skip_accept_encoding, skip_host=skip_host
-        )
-        for header, value in headers.items():
-            self.putheader(header, value)
-        if "transfer-encoding" not in headers:
-            self.putheader("Transfer-Encoding", "chunked")
-        self.endheaders()
-
-        if body is not None:
-            stringish_types = six.string_types + (bytes,)
-            if isinstance(body, stringish_types):
-                body = (body,)
-            for chunk in body:
-                if not chunk:
-                    continue
-                if not isinstance(chunk, bytes):
-                    chunk = chunk.encode("utf8")
-                len_str = hex(len(chunk))[2:]
-                self.send(len_str.encode("utf-8"))
-                self.send(b"\r\n")
-                self.send(chunk)
-                self.send(b"\r\n")
-
-        # After the if clause, to always have a closed body
-        self.send(b"0\r\n\r\n")
-
-
-class HTTPSConnection(HTTPConnection):
-    default_port = port_by_scheme["https"]
-
-    ssl_version = None
-
-    def __init__(
-        self,
-        host,
-        port=None,
-        key_file=None,
-        cert_file=None,
-        key_password=None,
-        strict=None,
-        timeout=socket._GLOBAL_DEFAULT_TIMEOUT,
-        ssl_context=None,
-        server_hostname=None,
-        **kw
-    ):
-
-        HTTPConnection.__init__(self, host, port, strict=strict, timeout=timeout, **kw)
-
-        self.key_file = key_file
-        self.cert_file = cert_file
-        self.key_password = key_password
-        self.ssl_context = ssl_context
-        self.server_hostname = server_hostname
-
-        # Required property for Google AppEngine 1.9.0 which otherwise causes
-        # HTTPS requests to go out as HTTP. (See Issue #356)
-        self._protocol = "https"
-
-    def connect(self):
-        conn = self._new_conn()
-        self._prepare_conn(conn)
-
-        # Wrap socket using verification with the root certs in
-        # trusted_root_certs
-        default_ssl_context = False
-        if self.ssl_context is None:
-            default_ssl_context = True
-            self.ssl_context = create_urllib3_context(
-                ssl_version=resolve_ssl_version(self.ssl_version),
-                cert_reqs=resolve_cert_reqs(self.cert_reqs),
-            )
-
-        # Try to load OS default certs if none are given.
-        # Works well on Windows (requires Python3.4+)
-        context = self.ssl_context
-        if (
-            not self.ca_certs
-            and not self.ca_cert_dir
-            and default_ssl_context
-            and hasattr(context, "load_default_certs")
-        ):
-            context.load_default_certs()
-
-        self.sock = ssl_wrap_socket(
-            sock=conn,
-            keyfile=self.key_file,
-            certfile=self.cert_file,
-            key_password=self.key_password,
-            ssl_context=self.ssl_context,
-            server_hostname=self.server_hostname,
-        )
-
-
-class VerifiedHTTPSConnection(HTTPSConnection):
-    """
-    Based on httplib.HTTPSConnection but wraps the socket with
-    SSL certification.
-    """
-
-    cert_reqs = None
-    ca_certs = None
-    ca_cert_dir = None
-    ssl_version = None
-    assert_fingerprint = None
-
-    def set_cert(
-        self,
-        key_file=None,
-        cert_file=None,
-        cert_reqs=None,
-        key_password=None,
-        ca_certs=None,
-        assert_hostname=None,
-        assert_fingerprint=None,
-        ca_cert_dir=None,
-    ):
-        """
-        This method should only be called once, before the connection is used.
-        """
-        # If cert_reqs is not provided we'll assume CERT_REQUIRED unless we also
-        # have an SSLContext object in which case we'll use its verify_mode.
-        if cert_reqs is None:
-            if self.ssl_context is not None:
-                cert_reqs = self.ssl_context.verify_mode
-            else:
-                cert_reqs = resolve_cert_reqs(None)
-
-        self.key_file = key_file
-        self.cert_file = cert_file
-        self.cert_reqs = cert_reqs
-        self.key_password = key_password
-        self.assert_hostname = assert_hostname
-        self.assert_fingerprint = assert_fingerprint
-        self.ca_certs = ca_certs and os.path.expanduser(ca_certs)
-        self.ca_cert_dir = ca_cert_dir and os.path.expanduser(ca_cert_dir)
-
-    def connect(self):
-        # Add certificate verification
-        conn = self._new_conn()
-        hostname = self.host
-
-        # Google App Engine's httplib does not define _tunnel_host
-        if getattr(self, "_tunnel_host", None):
-            self.sock = conn
-            # Calls self._set_hostport(), so self.host is
-            # self._tunnel_host below.
-            self._tunnel()
-            # Mark this connection as not reusable
-            self.auto_open = 0
-
-            # Override the host with the one we're requesting data from.
-            hostname = self._tunnel_host
-
-        server_hostname = hostname
-        if self.server_hostname is not None:
-            server_hostname = self.server_hostname
-
-        is_time_off = datetime.date.today() < RECENT_DATE
-        if is_time_off:
-            warnings.warn(
-                (
-                    "System time is way off (before {0}). This will probably "
-                    "lead to SSL verification errors"
-                ).format(RECENT_DATE),
-                SystemTimeWarning,
-            )
-
-        # Wrap socket using verification with the root certs in
-        # trusted_root_certs
-        default_ssl_context = False
-        if self.ssl_context is None:
-            default_ssl_context = True
-            self.ssl_context = create_urllib3_context(
-                ssl_version=resolve_ssl_version(self.ssl_version),
-                cert_reqs=resolve_cert_reqs(self.cert_reqs),
-            )
-
-        context = self.ssl_context
-        context.verify_mode = resolve_cert_reqs(self.cert_reqs)
-
-        # Try to load OS default certs if none are given.
-        # Works well on Windows (requires Python3.4+)
-        if (
-            not self.ca_certs
-            and not self.ca_cert_dir
-            and default_ssl_context
-            and hasattr(context, "load_default_certs")
-        ):
-            context.load_default_certs()
-
-        self.sock = ssl_wrap_socket(
-            sock=conn,
-            keyfile=self.key_file,
-            certfile=self.cert_file,
-            key_password=self.key_password,
-            ca_certs=self.ca_certs,
-            ca_cert_dir=self.ca_cert_dir,
-            server_hostname=server_hostname,
-            ssl_context=context,
-        )
-
-        if self.assert_fingerprint:
-            assert_fingerprint(
-                self.sock.getpeercert(binary_form=True), self.assert_fingerprint
-            )
-        elif (
-            context.verify_mode != ssl.CERT_NONE
-            and not getattr(context, "check_hostname", False)
-            and self.assert_hostname is not False
-        ):
-            # While urllib3 attempts to always turn off hostname matching from
-            # the TLS library, this cannot always be done. So we check whether
-            # the TLS Library still thinks it's matching hostnames.
-            cert = self.sock.getpeercert()
-            if not cert.get("subjectAltName", ()):
-                warnings.warn(
-                    (
-                        "Certificate for {0} has no `subjectAltName`, falling back to check for a "
-                        "`commonName` for now. This feature is being removed by major browsers and "
-                        "deprecated by RFC 2818. (See https://github.com/urllib3/urllib3/issues/497 "
-                        "for details.)".format(hostname)
-                    ),
-                    SubjectAltNameWarning,
-                )
-            _match_hostname(cert, self.assert_hostname or server_hostname)
-
-        self.is_verified = (
-            context.verify_mode == ssl.CERT_REQUIRED
-            or self.assert_fingerprint is not None
-        )
-
-
-def _match_hostname(cert, asserted_hostname):
-    try:
-        match_hostname(cert, asserted_hostname)
-    except CertificateError as e:
-        log.warning(
-            "Certificate did not match expected hostname: %s. Certificate: %s",
-            asserted_hostname,
-            cert,
-        )
-        # Add cert to exception and reraise so client code can inspect
-        # the cert when catching the exception, if they want to
-        e._peer_cert = cert
-        raise
-
-
-if ssl:
-    # Make a copy for testing.
-    UnverifiedHTTPSConnection = HTTPSConnection
-    HTTPSConnection = VerifiedHTTPSConnection
-else:
-    HTTPSConnection = DummyConnection
diff --git a/venv/lib/python3.7/site-packages/urllib3/connectionpool.py b/venv/lib/python3.7/site-packages/urllib3/connectionpool.py
deleted file mode 100644
index 3169646..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/connectionpool.py
+++ /dev/null
@@ -1,1051 +0,0 @@
-from __future__ import absolute_import
-import errno
-import logging
-import sys
-import warnings
-
-from socket import error as SocketError, timeout as SocketTimeout
-import socket
-
-
-from .exceptions import (
-    ClosedPoolError,
-    ProtocolError,
-    EmptyPoolError,
-    HeaderParsingError,
-    HostChangedError,
-    LocationValueError,
-    MaxRetryError,
-    ProxyError,
-    ReadTimeoutError,
-    SSLError,
-    TimeoutError,
-    InsecureRequestWarning,
-    NewConnectionError,
-)
-from .packages.ssl_match_hostname import CertificateError
-from .packages import six
-from .packages.six.moves import queue
-from .connection import (
-    port_by_scheme,
-    DummyConnection,
-    HTTPConnection,
-    HTTPSConnection,
-    VerifiedHTTPSConnection,
-    HTTPException,
-    BaseSSLError,
-)
-from .request import RequestMethods
-from .response import HTTPResponse
-
-from .util.connection import is_connection_dropped
-from .util.request import set_file_position
-from .util.response import assert_header_parsing
-from .util.retry import Retry
-from .util.timeout import Timeout
-from .util.url import (
-    get_host,
-    parse_url,
-    Url,
-    _normalize_host as normalize_host,
-    _encode_target,
-)
-from .util.queue import LifoQueue
-
-
-xrange = six.moves.xrange
-
-log = logging.getLogger(__name__)
-
-_Default = object()
-
-
-# Pool objects
-class ConnectionPool(object):
-    """
-    Base class for all connection pools, such as
-    :class:`.HTTPConnectionPool` and :class:`.HTTPSConnectionPool`.
-    """
-
-    scheme = None
-    QueueCls = LifoQueue
-
-    def __init__(self, host, port=None):
-        if not host:
-            raise LocationValueError("No host specified.")
-
-        self.host = _normalize_host(host, scheme=self.scheme)
-        self._proxy_host = host.lower()
-        self.port = port
-
-    def __str__(self):
-        return "%s(host=%r, port=%r)" % (type(self).__name__, self.host, self.port)
-
-    def __enter__(self):
-        return self
-
-    def __exit__(self, exc_type, exc_val, exc_tb):
-        self.close()
-        # Return False to re-raise any potential exceptions
-        return False
-
-    def close(self):
-        """
-        Close all pooled connections and disable the pool.
-        """
-        pass
-
-
-# This is taken from http://hg.python.org/cpython/file/7aaba721ebc0/Lib/socket.py#l252
-_blocking_errnos = {errno.EAGAIN, errno.EWOULDBLOCK}
-
-
-class HTTPConnectionPool(ConnectionPool, RequestMethods):
-    """
-    Thread-safe connection pool for one host.
-
-    :param host:
-        Host used for this HTTP Connection (e.g. "localhost"), passed into
-        :class:`httplib.HTTPConnection`.
-
-    :param port:
-        Port used for this HTTP Connection (None is equivalent to 80), passed
-        into :class:`httplib.HTTPConnection`.
-
-    :param strict:
-        Causes BadStatusLine to be raised if the status line can't be parsed
-        as a valid HTTP/1.0 or 1.1 status line, passed into
-        :class:`httplib.HTTPConnection`.
-
-        .. note::
-           Only works in Python 2. This parameter is ignored in Python 3.
-
-    :param timeout:
-        Socket timeout in seconds for each individual connection. This can
-        be a float or integer, which sets the timeout for the HTTP request,
-        or an instance of :class:`urllib3.util.Timeout` which gives you more
-        fine-grained control over request timeouts. After the constructor has
-        been parsed, this is always a `urllib3.util.Timeout` object.
-
-    :param maxsize:
-        Number of connections to save that can be reused. More than 1 is useful
-        in multithreaded situations. If ``block`` is set to False, more
-        connections will be created but they will not be saved once they've
-        been used.
-
-    :param block:
-        If set to True, no more than ``maxsize`` connections will be used at
-        a time. When no free connections are available, the call will block
-        until a connection has been released. This is a useful side effect for
-        particular multithreaded situations where one does not want to use more
-        than maxsize connections per host to prevent flooding.
-
-    :param headers:
-        Headers to include with all requests, unless other headers are given
-        explicitly.
-
-    :param retries:
-        Retry configuration to use by default with requests in this pool.
-
-    :param _proxy:
-        Parsed proxy URL, should not be used directly, instead, see
-        :class:`urllib3.connectionpool.ProxyManager`"
-
-    :param _proxy_headers:
-        A dictionary with proxy headers, should not be used directly,
-        instead, see :class:`urllib3.connectionpool.ProxyManager`"
-
-    :param \\**conn_kw:
-        Additional parameters are used to create fresh :class:`urllib3.connection.HTTPConnection`,
-        :class:`urllib3.connection.HTTPSConnection` instances.
-    """
-
-    scheme = "http"
-    ConnectionCls = HTTPConnection
-    ResponseCls = HTTPResponse
-
-    def __init__(
-        self,
-        host,
-        port=None,
-        strict=False,
-        timeout=Timeout.DEFAULT_TIMEOUT,
-        maxsize=1,
-        block=False,
-        headers=None,
-        retries=None,
-        _proxy=None,
-        _proxy_headers=None,
-        **conn_kw
-    ):
-        ConnectionPool.__init__(self, host, port)
-        RequestMethods.__init__(self, headers)
-
-        self.strict = strict
-
-        if not isinstance(timeout, Timeout):
-            timeout = Timeout.from_float(timeout)
-
-        if retries is None:
-            retries = Retry.DEFAULT
-
-        self.timeout = timeout
-        self.retries = retries
-
-        self.pool = self.QueueCls(maxsize)
-        self.block = block
-
-        self.proxy = _proxy
-        self.proxy_headers = _proxy_headers or {}
-
-        # Fill the queue up so that doing get() on it will block properly
-        for _ in xrange(maxsize):
-            self.pool.put(None)
-
-        # These are mostly for testing and debugging purposes.
-        self.num_connections = 0
-        self.num_requests = 0
-        self.conn_kw = conn_kw
-
-        if self.proxy:
-            # Enable Nagle's algorithm for proxies, to avoid packet fragmentation.
-            # We cannot know if the user has added default socket options, so we cannot replace the
-            # list.
-            self.conn_kw.setdefault("socket_options", [])
-
-    def _new_conn(self):
-        """
-        Return a fresh :class:`HTTPConnection`.
-        """
-        self.num_connections += 1
-        log.debug(
-            "Starting new HTTP connection (%d): %s:%s",
-            self.num_connections,
-            self.host,
-            self.port or "80",
-        )
-
-        conn = self.ConnectionCls(
-            host=self.host,
-            port=self.port,
-            timeout=self.timeout.connect_timeout,
-            strict=self.strict,
-            **self.conn_kw
-        )
-        return conn
-
-    def _get_conn(self, timeout=None):
-        """
-        Get a connection. Will return a pooled connection if one is available.
-
-        If no connections are available and :prop:`.block` is ``False``, then a
-        fresh connection is returned.
-
-        :param timeout:
-            Seconds to wait before giving up and raising
-            :class:`urllib3.exceptions.EmptyPoolError` if the pool is empty and
-            :prop:`.block` is ``True``.
-        """
-        conn = None
-        try:
-            conn = self.pool.get(block=self.block, timeout=timeout)
-
-        except AttributeError:  # self.pool is None
-            raise ClosedPoolError(self, "Pool is closed.")
-
-        except queue.Empty:
-            if self.block:
-                raise EmptyPoolError(
-                    self,
-                    "Pool reached maximum size and no more connections are allowed.",
-                )
-            pass  # Oh well, we'll create a new connection then
-
-        # If this is a persistent connection, check if it got disconnected
-        if conn and is_connection_dropped(conn):
-            log.debug("Resetting dropped connection: %s", self.host)
-            conn.close()
-            if getattr(conn, "auto_open", 1) == 0:
-                # This is a proxied connection that has been mutated by
-                # httplib._tunnel() and cannot be reused (since it would
-                # attempt to bypass the proxy)
-                conn = None
-
-        return conn or self._new_conn()
-
-    def _put_conn(self, conn):
-        """
-        Put a connection back into the pool.
-
-        :param conn:
-            Connection object for the current host and port as returned by
-            :meth:`._new_conn` or :meth:`._get_conn`.
-
-        If the pool is already full, the connection is closed and discarded
-        because we exceeded maxsize. If connections are discarded frequently,
-        then maxsize should be increased.
-
-        If the pool is closed, then the connection will be closed and discarded.
-        """
-        try:
-            self.pool.put(conn, block=False)
-            return  # Everything is dandy, done.
-        except AttributeError:
-            # self.pool is None.
-            pass
-        except queue.Full:
-            # This should never happen if self.block == True
-            log.warning("Connection pool is full, discarding connection: %s", self.host)
-
-        # Connection never got put back into the pool, close it.
-        if conn:
-            conn.close()
-
-    def _validate_conn(self, conn):
-        """
-        Called right before a request is made, after the socket is created.
-        """
-        pass
-
-    def _prepare_proxy(self, conn):
-        # Nothing to do for HTTP connections.
-        pass
-
-    def _get_timeout(self, timeout):
-        """ Helper that always returns a :class:`urllib3.util.Timeout` """
-        if timeout is _Default:
-            return self.timeout.clone()
-
-        if isinstance(timeout, Timeout):
-            return timeout.clone()
-        else:
-            # User passed us an int/float. This is for backwards compatibility,
-            # can be removed later
-            return Timeout.from_float(timeout)
-
-    def _raise_timeout(self, err, url, timeout_value):
-        """Is the error actually a timeout? Will raise a ReadTimeout or pass"""
-
-        if isinstance(err, SocketTimeout):
-            raise ReadTimeoutError(
-                self, url, "Read timed out. (read timeout=%s)" % timeout_value
-            )
-
-        # See the above comment about EAGAIN in Python 3. In Python 2 we have
-        # to specifically catch it and throw the timeout error
-        if hasattr(err, "errno") and err.errno in _blocking_errnos:
-            raise ReadTimeoutError(
-                self, url, "Read timed out. (read timeout=%s)" % timeout_value
-            )
-
-        # Catch possible read timeouts thrown as SSL errors. If not the
-        # case, rethrow the original. We need to do this because of:
-        # http://bugs.python.org/issue10272
-        if "timed out" in str(err) or "did not complete (read)" in str(
-            err
-        ):  # Python < 2.7.4
-            raise ReadTimeoutError(
-                self, url, "Read timed out. (read timeout=%s)" % timeout_value
-            )
-
-    def _make_request(
-        self, conn, method, url, timeout=_Default, chunked=False, **httplib_request_kw
-    ):
-        """
-        Perform a request on a given urllib connection object taken from our
-        pool.
-
-        :param conn:
-            a connection from one of our connection pools
-
-        :param timeout:
-            Socket timeout in seconds for the request. This can be a
-            float or integer, which will set the same timeout value for
-            the socket connect and the socket read, or an instance of
-            :class:`urllib3.util.Timeout`, which gives you more fine-grained
-            control over your timeouts.
-        """
-        self.num_requests += 1
-
-        timeout_obj = self._get_timeout(timeout)
-        timeout_obj.start_connect()
-        conn.timeout = timeout_obj.connect_timeout
-
-        # Trigger any extra validation we need to do.
-        try:
-            self._validate_conn(conn)
-        except (SocketTimeout, BaseSSLError) as e:
-            # Py2 raises this as a BaseSSLError, Py3 raises it as socket timeout.
-            self._raise_timeout(err=e, url=url, timeout_value=conn.timeout)
-            raise
-
-        # conn.request() calls httplib.*.request, not the method in
-        # urllib3.request. It also calls makefile (recv) on the socket.
-        if chunked:
-            conn.request_chunked(method, url, **httplib_request_kw)
-        else:
-            conn.request(method, url, **httplib_request_kw)
-
-        # Reset the timeout for the recv() on the socket
-        read_timeout = timeout_obj.read_timeout
-
-        # App Engine doesn't have a sock attr
-        if getattr(conn, "sock", None):
-            # In Python 3 socket.py will catch EAGAIN and return None when you
-            # try and read into the file pointer created by http.client, which
-            # instead raises a BadStatusLine exception. Instead of catching
-            # the exception and assuming all BadStatusLine exceptions are read
-            # timeouts, check for a zero timeout before making the request.
-            if read_timeout == 0:
-                raise ReadTimeoutError(
-                    self, url, "Read timed out. (read timeout=%s)" % read_timeout
-                )
-            if read_timeout is Timeout.DEFAULT_TIMEOUT:
-                conn.sock.settimeout(socket.getdefaulttimeout())
-            else:  # None or a value
-                conn.sock.settimeout(read_timeout)
-
-        # Receive the response from the server
-        try:
-            try:
-                # Python 2.7, use buffering of HTTP responses
-                httplib_response = conn.getresponse(buffering=True)
-            except TypeError:
-                # Python 3
-                try:
-                    httplib_response = conn.getresponse()
-                except BaseException as e:
-                    # Remove the TypeError from the exception chain in
-                    # Python 3 (including for exceptions like SystemExit).
-                    # Otherwise it looks like a bug in the code.
-                    six.raise_from(e, None)
-        except (SocketTimeout, BaseSSLError, SocketError) as e:
-            self._raise_timeout(err=e, url=url, timeout_value=read_timeout)
-            raise
-
-        # AppEngine doesn't have a version attr.
-        http_version = getattr(conn, "_http_vsn_str", "HTTP/?")
-        log.debug(
-            '%s://%s:%s "%s %s %s" %s %s',
-            self.scheme,
-            self.host,
-            self.port,
-            method,
-            url,
-            http_version,
-            httplib_response.status,
-            httplib_response.length,
-        )
-
-        try:
-            assert_header_parsing(httplib_response.msg)
-        except (HeaderParsingError, TypeError) as hpe:  # Platform-specific: Python 3
-            log.warning(
-                "Failed to parse headers (url=%s): %s",
-                self._absolute_url(url),
-                hpe,
-                exc_info=True,
-            )
-
-        return httplib_response
-
-    def _absolute_url(self, path):
-        return Url(scheme=self.scheme, host=self.host, port=self.port, path=path).url
-
-    def close(self):
-        """
-        Close all pooled connections and disable the pool.
-        """
-        if self.pool is None:
-            return
-        # Disable access to the pool
-        old_pool, self.pool = self.pool, None
-
-        try:
-            while True:
-                conn = old_pool.get(block=False)
-                if conn:
-                    conn.close()
-
-        except queue.Empty:
-            pass  # Done.
-
-    def is_same_host(self, url):
-        """
-        Check if the given ``url`` is a member of the same host as this
-        connection pool.
-        """
-        if url.startswith("/"):
-            return True
-
-        # TODO: Add optional support for socket.gethostbyname checking.
-        scheme, host, port = get_host(url)
-        if host is not None:
-            host = _normalize_host(host, scheme=scheme)
-
-        # Use explicit default port for comparison when none is given
-        if self.port and not port:
-            port = port_by_scheme.get(scheme)
-        elif not self.port and port == port_by_scheme.get(scheme):
-            port = None
-
-        return (scheme, host, port) == (self.scheme, self.host, self.port)
-
-    def urlopen(
-        self,
-        method,
-        url,
-        body=None,
-        headers=None,
-        retries=None,
-        redirect=True,
-        assert_same_host=True,
-        timeout=_Default,
-        pool_timeout=None,
-        release_conn=None,
-        chunked=False,
-        body_pos=None,
-        **response_kw
-    ):
-        """
-        Get a connection from the pool and perform an HTTP request. This is the
-        lowest level call for making a request, so you'll need to specify all
-        the raw details.
-
-        .. note::
-
-           More commonly, it's appropriate to use a convenience method provided
-           by :class:`.RequestMethods`, such as :meth:`request`.
-
-        .. note::
-
-           `release_conn` will only behave as expected if
-           `preload_content=False` because we want to make
-           `preload_content=False` the default behaviour someday soon without
-           breaking backwards compatibility.
-
-        :param method:
-            HTTP request method (such as GET, POST, PUT, etc.)
-
-        :param body:
-            Data to send in the request body (useful for creating
-            POST requests, see HTTPConnectionPool.post_url for
-            more convenience).
-
-        :param headers:
-            Dictionary of custom headers to send, such as User-Agent,
-            If-None-Match, etc. If None, pool headers are used. If provided,
-            these headers completely replace any pool-specific headers.
-
-        :param retries:
-            Configure the number of retries to allow before raising a
-            :class:`~urllib3.exceptions.MaxRetryError` exception.
-
-            Pass ``None`` to retry until you receive a response. Pass a
-            :class:`~urllib3.util.retry.Retry` object for fine-grained control
-            over different types of retries.
-            Pass an integer number to retry connection errors that many times,
-            but no other types of errors. Pass zero to never retry.
-
-            If ``False``, then retries are disabled and any exception is raised
-            immediately. Also, instead of raising a MaxRetryError on redirects,
-            the redirect response will be returned.
-
-        :type retries: :class:`~urllib3.util.retry.Retry`, False, or an int.
-
-        :param redirect:
-            If True, automatically handle redirects (status codes 301, 302,
-            303, 307, 308). Each redirect counts as a retry. Disabling retries
-            will disable redirect, too.
-
-        :param assert_same_host:
-            If ``True``, will make sure that the host of the pool requests is
-            consistent else will raise HostChangedError. When False, you can
-            use the pool on an HTTP proxy and request foreign hosts.
-
-        :param timeout:
-            If specified, overrides the default timeout for this one
-            request. It may be a float (in seconds) or an instance of
-            :class:`urllib3.util.Timeout`.
-
-        :param pool_timeout:
-            If set and the pool is set to block=True, then this method will
-            block for ``pool_timeout`` seconds and raise EmptyPoolError if no
-            connection is available within the time period.
-
-        :param release_conn:
-            If False, then the urlopen call will not release the connection
-            back into the pool once a response is received (but will release if
-            you read the entire contents of the response such as when
-            `preload_content=True`). This is useful if you're not preloading
-            the response's content immediately. You will need to call
-            ``r.release_conn()`` on the response ``r`` to return the connection
-            back into the pool. If None, it takes the value of
-            ``response_kw.get('preload_content', True)``.
-
-        :param chunked:
-            If True, urllib3 will send the body using chunked transfer
-            encoding. Otherwise, urllib3 will send the body using the standard
-            content-length form. Defaults to False.
-
-        :param int body_pos:
-            Position to seek to in file-like body in the event of a retry or
-            redirect. Typically this won't need to be set because urllib3 will
-            auto-populate the value when needed.
-
-        :param \\**response_kw:
-            Additional parameters are passed to
-            :meth:`urllib3.response.HTTPResponse.from_httplib`
-        """
-        if headers is None:
-            headers = self.headers
-
-        if not isinstance(retries, Retry):
-            retries = Retry.from_int(retries, redirect=redirect, default=self.retries)
-
-        if release_conn is None:
-            release_conn = response_kw.get("preload_content", True)
-
-        # Check host
-        if assert_same_host and not self.is_same_host(url):
-            raise HostChangedError(self, url, retries)
-
-        # Ensure that the URL we're connecting to is properly encoded
-        if url.startswith("/"):
-            url = six.ensure_str(_encode_target(url))
-        else:
-            url = six.ensure_str(parse_url(url).url)
-
-        conn = None
-
-        # Track whether `conn` needs to be released before
-        # returning/raising/recursing. Update this variable if necessary, and
-        # leave `release_conn` constant throughout the function. That way, if
-        # the function recurses, the original value of `release_conn` will be
-        # passed down into the recursive call, and its value will be respected.
-        #
-        # See issue #651 [1] for details.
-        #
-        # [1] <https://github.com/urllib3/urllib3/issues/651>
-        release_this_conn = release_conn
-
-        # Merge the proxy headers. Only do this in HTTP. We have to copy the
-        # headers dict so we can safely change it without those changes being
-        # reflected in anyone else's copy.
-        if self.scheme == "http":
-            headers = headers.copy()
-            headers.update(self.proxy_headers)
-
-        # Must keep the exception bound to a separate variable or else Python 3
-        # complains about UnboundLocalError.
-        err = None
-
-        # Keep track of whether we cleanly exited the except block. This
-        # ensures we do proper cleanup in finally.
-        clean_exit = False
-
-        # Rewind body position, if needed. Record current position
-        # for future rewinds in the event of a redirect/retry.
-        body_pos = set_file_position(body, body_pos)
-
-        try:
-            # Request a connection from the queue.
-            timeout_obj = self._get_timeout(timeout)
-            conn = self._get_conn(timeout=pool_timeout)
-
-            conn.timeout = timeout_obj.connect_timeout
-
-            is_new_proxy_conn = self.proxy is not None and not getattr(
-                conn, "sock", None
-            )
-            if is_new_proxy_conn:
-                self._prepare_proxy(conn)
-
-            # Make the request on the httplib connection object.
-            httplib_response = self._make_request(
-                conn,
-                method,
-                url,
-                timeout=timeout_obj,
-                body=body,
-                headers=headers,
-                chunked=chunked,
-            )
-
-            # If we're going to release the connection in ``finally:``, then
-            # the response doesn't need to know about the connection. Otherwise
-            # it will also try to release it and we'll have a double-release
-            # mess.
-            response_conn = conn if not release_conn else None
-
-            # Pass method to Response for length checking
-            response_kw["request_method"] = method
-
-            # Import httplib's response into our own wrapper object
-            response = self.ResponseCls.from_httplib(
-                httplib_response,
-                pool=self,
-                connection=response_conn,
-                retries=retries,
-                **response_kw
-            )
-
-            # Everything went great!
-            clean_exit = True
-
-        except queue.Empty:
-            # Timed out by queue.
-            raise EmptyPoolError(self, "No pool connections are available.")
-
-        except (
-            TimeoutError,
-            HTTPException,
-            SocketError,
-            ProtocolError,
-            BaseSSLError,
-            SSLError,
-            CertificateError,
-        ) as e:
-            # Discard the connection for these exceptions. It will be
-            # replaced during the next _get_conn() call.
-            clean_exit = False
-            if isinstance(e, (BaseSSLError, CertificateError)):
-                e = SSLError(e)
-            elif isinstance(e, (SocketError, NewConnectionError)) and self.proxy:
-                e = ProxyError("Cannot connect to proxy.", e)
-            elif isinstance(e, (SocketError, HTTPException)):
-                e = ProtocolError("Connection aborted.", e)
-
-            retries = retries.increment(
-                method, url, error=e, _pool=self, _stacktrace=sys.exc_info()[2]
-            )
-            retries.sleep()
-
-            # Keep track of the error for the retry warning.
-            err = e
-
-        finally:
-            if not clean_exit:
-                # We hit some kind of exception, handled or otherwise. We need
-                # to throw the connection away unless explicitly told not to.
-                # Close the connection, set the variable to None, and make sure
-                # we put the None back in the pool to avoid leaking it.
-                conn = conn and conn.close()
-                release_this_conn = True
-
-            if release_this_conn:
-                # Put the connection back to be reused. If the connection is
-                # expired then it will be None, which will get replaced with a
-                # fresh connection during _get_conn.
-                self._put_conn(conn)
-
-        if not conn:
-            # Try again
-            log.warning(
-                "Retrying (%r) after connection broken by '%r': %s", retries, err, url
-            )
-            return self.urlopen(
-                method,
-                url,
-                body,
-                headers,
-                retries,
-                redirect,
-                assert_same_host,
-                timeout=timeout,
-                pool_timeout=pool_timeout,
-                release_conn=release_conn,
-                chunked=chunked,
-                body_pos=body_pos,
-                **response_kw
-            )
-
-        def drain_and_release_conn(response):
-            try:
-                # discard any remaining response body, the connection will be
-                # released back to the pool once the entire response is read
-                response.read()
-            except (
-                TimeoutError,
-                HTTPException,
-                SocketError,
-                ProtocolError,
-                BaseSSLError,
-                SSLError,
-            ):
-                pass
-
-        # Handle redirect?
-        redirect_location = redirect and response.get_redirect_location()
-        if redirect_location:
-            if response.status == 303:
-                method = "GET"
-
-            try:
-                retries = retries.increment(method, url, response=response, _pool=self)
-            except MaxRetryError:
-                if retries.raise_on_redirect:
-                    # Drain and release the connection for this response, since
-                    # we're not returning it to be released manually.
-                    drain_and_release_conn(response)
-                    raise
-                return response
-
-            # drain and return the connection to the pool before recursing
-            drain_and_release_conn(response)
-
-            retries.sleep_for_retry(response)
-            log.debug("Redirecting %s -> %s", url, redirect_location)
-            return self.urlopen(
-                method,
-                redirect_location,
-                body,
-                headers,
-                retries=retries,
-                redirect=redirect,
-                assert_same_host=assert_same_host,
-                timeout=timeout,
-                pool_timeout=pool_timeout,
-                release_conn=release_conn,
-                chunked=chunked,
-                body_pos=body_pos,
-                **response_kw
-            )
-
-        # Check if we should retry the HTTP response.
-        has_retry_after = bool(response.getheader("Retry-After"))
-        if retries.is_retry(method, response.status, has_retry_after):
-            try:
-                retries = retries.increment(method, url, response=response, _pool=self)
-            except MaxRetryError:
-                if retries.raise_on_status:
-                    # Drain and release the connection for this response, since
-                    # we're not returning it to be released manually.
-                    drain_and_release_conn(response)
-                    raise
-                return response
-
-            # drain and return the connection to the pool before recursing
-            drain_and_release_conn(response)
-
-            retries.sleep(response)
-            log.debug("Retry: %s", url)
-            return self.urlopen(
-                method,
-                url,
-                body,
-                headers,
-                retries=retries,
-                redirect=redirect,
-                assert_same_host=assert_same_host,
-                timeout=timeout,
-                pool_timeout=pool_timeout,
-                release_conn=release_conn,
-                chunked=chunked,
-                body_pos=body_pos,
-                **response_kw
-            )
-
-        return response
-
-
-class HTTPSConnectionPool(HTTPConnectionPool):
-    """
-    Same as :class:`.HTTPConnectionPool`, but HTTPS.
-
-    When Python is compiled with the :mod:`ssl` module, then
-    :class:`.VerifiedHTTPSConnection` is used, which *can* verify certificates,
-    instead of :class:`.HTTPSConnection`.
-
-    :class:`.VerifiedHTTPSConnection` uses one of ``assert_fingerprint``,
-    ``assert_hostname`` and ``host`` in this order to verify connections.
-    If ``assert_hostname`` is False, no verification is done.
-
-    The ``key_file``, ``cert_file``, ``cert_reqs``, ``ca_certs``,
-    ``ca_cert_dir``, ``ssl_version``, ``key_password`` are only used if :mod:`ssl`
-    is available and are fed into :meth:`urllib3.util.ssl_wrap_socket` to upgrade
-    the connection socket into an SSL socket.
-    """
-
-    scheme = "https"
-    ConnectionCls = HTTPSConnection
-
-    def __init__(
-        self,
-        host,
-        port=None,
-        strict=False,
-        timeout=Timeout.DEFAULT_TIMEOUT,
-        maxsize=1,
-        block=False,
-        headers=None,
-        retries=None,
-        _proxy=None,
-        _proxy_headers=None,
-        key_file=None,
-        cert_file=None,
-        cert_reqs=None,
-        key_password=None,
-        ca_certs=None,
-        ssl_version=None,
-        assert_hostname=None,
-        assert_fingerprint=None,
-        ca_cert_dir=None,
-        **conn_kw
-    ):
-
-        HTTPConnectionPool.__init__(
-            self,
-            host,
-            port,
-            strict,
-            timeout,
-            maxsize,
-            block,
-            headers,
-            retries,
-            _proxy,
-            _proxy_headers,
-            **conn_kw
-        )
-
-        self.key_file = key_file
-        self.cert_file = cert_file
-        self.cert_reqs = cert_reqs
-        self.key_password = key_password
-        self.ca_certs = ca_certs
-        self.ca_cert_dir = ca_cert_dir
-        self.ssl_version = ssl_version
-        self.assert_hostname = assert_hostname
-        self.assert_fingerprint = assert_fingerprint
-
-    def _prepare_conn(self, conn):
-        """
-        Prepare the ``connection`` for :meth:`urllib3.util.ssl_wrap_socket`
-        and establish the tunnel if proxy is used.
-        """
-
-        if isinstance(conn, VerifiedHTTPSConnection):
-            conn.set_cert(
-                key_file=self.key_file,
-                key_password=self.key_password,
-                cert_file=self.cert_file,
-                cert_reqs=self.cert_reqs,
-                ca_certs=self.ca_certs,
-                ca_cert_dir=self.ca_cert_dir,
-                assert_hostname=self.assert_hostname,
-                assert_fingerprint=self.assert_fingerprint,
-            )
-            conn.ssl_version = self.ssl_version
-        return conn
-
-    def _prepare_proxy(self, conn):
-        """
-        Establish tunnel connection early, because otherwise httplib
-        would improperly set Host: header to proxy's IP:port.
-        """
-        conn.set_tunnel(self._proxy_host, self.port, self.proxy_headers)
-        conn.connect()
-
-    def _new_conn(self):
-        """
-        Return a fresh :class:`httplib.HTTPSConnection`.
-        """
-        self.num_connections += 1
-        log.debug(
-            "Starting new HTTPS connection (%d): %s:%s",
-            self.num_connections,
-            self.host,
-            self.port or "443",
-        )
-
-        if not self.ConnectionCls or self.ConnectionCls is DummyConnection:
-            raise SSLError(
-                "Can't connect to HTTPS URL because the SSL module is not available."
-            )
-
-        actual_host = self.host
-        actual_port = self.port
-        if self.proxy is not None:
-            actual_host = self.proxy.host
-            actual_port = self.proxy.port
-
-        conn = self.ConnectionCls(
-            host=actual_host,
-            port=actual_port,
-            timeout=self.timeout.connect_timeout,
-            strict=self.strict,
-            cert_file=self.cert_file,
-            key_file=self.key_file,
-            key_password=self.key_password,
-            **self.conn_kw
-        )
-
-        return self._prepare_conn(conn)
-
-    def _validate_conn(self, conn):
-        """
-        Called right before a request is made, after the socket is created.
-        """
-        super(HTTPSConnectionPool, self)._validate_conn(conn)
-
-        # Force connect early to allow us to validate the connection.
-        if not getattr(conn, "sock", None):  # AppEngine might not have  `.sock`
-            conn.connect()
-
-        if not conn.is_verified:
-            warnings.warn(
-                (
-                    "Unverified HTTPS request is being made. "
-                    "Adding certificate verification is strongly advised. See: "
-                    "https://urllib3.readthedocs.io/en/latest/advanced-usage.html"
-                    "#ssl-warnings"
-                ),
-                InsecureRequestWarning,
-            )
-
-
-def connection_from_url(url, **kw):
-    """
-    Given a url, return an :class:`.ConnectionPool` instance of its host.
-
-    This is a shortcut for not having to parse out the scheme, host, and port
-    of the url before creating an :class:`.ConnectionPool` instance.
-
-    :param url:
-        Absolute URL string that must include the scheme. Port is optional.
-
-    :param \\**kw:
-        Passes additional parameters to the constructor of the appropriate
-        :class:`.ConnectionPool`. Useful for specifying things like
-        timeout, maxsize, headers, etc.
-
-    Example::
-
-        >>> conn = connection_from_url('http://google.com/')
-        >>> r = conn.request('GET', '/')
-    """
-    scheme, host, port = get_host(url)
-    port = port or port_by_scheme.get(scheme, 80)
-    if scheme == "https":
-        return HTTPSConnectionPool(host, port=port, **kw)
-    else:
-        return HTTPConnectionPool(host, port=port, **kw)
-
-
-def _normalize_host(host, scheme):
-    """
-    Normalize hosts for comparisons and use with sockets.
-    """
-
-    host = normalize_host(host, scheme)
-
-    # httplib doesn't like it when we include brackets in IPv6 addresses
-    # Specifically, if we include brackets but also pass the port then
-    # httplib crazily doubles up the square brackets on the Host header.
-    # Instead, we need to make sure we never pass ``None`` as the port.
-    # However, for backward compatibility reasons we can't actually
-    # *assert* that.  See http://bugs.python.org/issue28539
-    if host.startswith("[") and host.endswith("]"):
-        host = host[1:-1]
-    return host
diff --git a/venv/lib/python3.7/site-packages/urllib3/contrib/__init__.py b/venv/lib/python3.7/site-packages/urllib3/contrib/__init__.py
deleted file mode 100644
index e69de29..0000000
diff --git a/venv/lib/python3.7/site-packages/urllib3/contrib/_appengine_environ.py b/venv/lib/python3.7/site-packages/urllib3/contrib/_appengine_environ.py
deleted file mode 100644
index 119efae..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/contrib/_appengine_environ.py
+++ /dev/null
@@ -1,36 +0,0 @@
-"""
-This module provides means to detect the App Engine environment.
-"""
-
-import os
-
-
-def is_appengine():
-    return "APPENGINE_RUNTIME" in os.environ
-
-
-def is_appengine_sandbox():
-    """Reports if the app is running in the first generation sandbox.
-
-    The second generation runtimes are technically still in a sandbox, but it
-    is much less restrictive, so generally you shouldn't need to check for it.
-    see https://cloud.google.com/appengine/docs/standard/runtimes
-    """
-    return is_appengine() and os.environ["APPENGINE_RUNTIME"] == "python27"
-
-
-def is_local_appengine():
-    return is_appengine() and os.environ.get("SERVER_SOFTWARE", "").startswith(
-        "Development/"
-    )
-
-
-def is_prod_appengine():
-    return is_appengine() and os.environ.get("SERVER_SOFTWARE", "").startswith(
-        "Google App Engine/"
-    )
-
-
-def is_prod_appengine_mvms():
-    """Deprecated."""
-    return False
diff --git a/venv/lib/python3.7/site-packages/urllib3/contrib/_securetransport/__init__.py b/venv/lib/python3.7/site-packages/urllib3/contrib/_securetransport/__init__.py
deleted file mode 100644
index e69de29..0000000
diff --git a/venv/lib/python3.7/site-packages/urllib3/contrib/_securetransport/bindings.py b/venv/lib/python3.7/site-packages/urllib3/contrib/_securetransport/bindings.py
deleted file mode 100644
index d9b6733..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/contrib/_securetransport/bindings.py
+++ /dev/null
@@ -1,493 +0,0 @@
-"""
-This module uses ctypes to bind a whole bunch of functions and constants from
-SecureTransport. The goal here is to provide the low-level API to
-SecureTransport. These are essentially the C-level functions and constants, and
-they're pretty gross to work with.
-
-This code is a bastardised version of the code found in Will Bond's oscrypto
-library. An enormous debt is owed to him for blazing this trail for us. For
-that reason, this code should be considered to be covered both by urllib3's
-license and by oscrypto's:
-
-    Copyright (c) 2015-2016 Will Bond <will@wbond.net>
-
-    Permission is hereby granted, free of charge, to any person obtaining a
-    copy of this software and associated documentation files (the "Software"),
-    to deal in the Software without restriction, including without limitation
-    the rights to use, copy, modify, merge, publish, distribute, sublicense,
-    and/or sell copies of the Software, and to permit persons to whom the
-    Software is furnished to do so, subject to the following conditions:
-
-    The above copyright notice and this permission notice shall be included in
-    all copies or substantial portions of the Software.
-
-    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
-    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-    DEALINGS IN THE SOFTWARE.
-"""
-from __future__ import absolute_import
-
-import platform
-from ctypes.util import find_library
-from ctypes import (
-    c_void_p,
-    c_int32,
-    c_char_p,
-    c_size_t,
-    c_byte,
-    c_uint32,
-    c_ulong,
-    c_long,
-    c_bool,
-)
-from ctypes import CDLL, POINTER, CFUNCTYPE
-
-
-security_path = find_library("Security")
-if not security_path:
-    raise ImportError("The library Security could not be found")
-
-
-core_foundation_path = find_library("CoreFoundation")
-if not core_foundation_path:
-    raise ImportError("The library CoreFoundation could not be found")
-
-
-version = platform.mac_ver()[0]
-version_info = tuple(map(int, version.split(".")))
-if version_info < (10, 8):
-    raise OSError(
-        "Only OS X 10.8 and newer are supported, not %s.%s"
-        % (version_info[0], version_info[1])
-    )
-
-Security = CDLL(security_path, use_errno=True)
-CoreFoundation = CDLL(core_foundation_path, use_errno=True)
-
-Boolean = c_bool
-CFIndex = c_long
-CFStringEncoding = c_uint32
-CFData = c_void_p
-CFString = c_void_p
-CFArray = c_void_p
-CFMutableArray = c_void_p
-CFDictionary = c_void_p
-CFError = c_void_p
-CFType = c_void_p
-CFTypeID = c_ulong
-
-CFTypeRef = POINTER(CFType)
-CFAllocatorRef = c_void_p
-
-OSStatus = c_int32
-
-CFDataRef = POINTER(CFData)
-CFStringRef = POINTER(CFString)
-CFArrayRef = POINTER(CFArray)
-CFMutableArrayRef = POINTER(CFMutableArray)
-CFDictionaryRef = POINTER(CFDictionary)
-CFArrayCallBacks = c_void_p
-CFDictionaryKeyCallBacks = c_void_p
-CFDictionaryValueCallBacks = c_void_p
-
-SecCertificateRef = POINTER(c_void_p)
-SecExternalFormat = c_uint32
-SecExternalItemType = c_uint32
-SecIdentityRef = POINTER(c_void_p)
-SecItemImportExportFlags = c_uint32
-SecItemImportExportKeyParameters = c_void_p
-SecKeychainRef = POINTER(c_void_p)
-SSLProtocol = c_uint32
-SSLCipherSuite = c_uint32
-SSLContextRef = POINTER(c_void_p)
-SecTrustRef = POINTER(c_void_p)
-SSLConnectionRef = c_uint32
-SecTrustResultType = c_uint32
-SecTrustOptionFlags = c_uint32
-SSLProtocolSide = c_uint32
-SSLConnectionType = c_uint32
-SSLSessionOption = c_uint32
-
-
-try:
-    Security.SecItemImport.argtypes = [
-        CFDataRef,
-        CFStringRef,
-        POINTER(SecExternalFormat),
-        POINTER(SecExternalItemType),
-        SecItemImportExportFlags,
-        POINTER(SecItemImportExportKeyParameters),
-        SecKeychainRef,
-        POINTER(CFArrayRef),
-    ]
-    Security.SecItemImport.restype = OSStatus
-
-    Security.SecCertificateGetTypeID.argtypes = []
-    Security.SecCertificateGetTypeID.restype = CFTypeID
-
-    Security.SecIdentityGetTypeID.argtypes = []
-    Security.SecIdentityGetTypeID.restype = CFTypeID
-
-    Security.SecKeyGetTypeID.argtypes = []
-    Security.SecKeyGetTypeID.restype = CFTypeID
-
-    Security.SecCertificateCreateWithData.argtypes = [CFAllocatorRef, CFDataRef]
-    Security.SecCertificateCreateWithData.restype = SecCertificateRef
-
-    Security.SecCertificateCopyData.argtypes = [SecCertificateRef]
-    Security.SecCertificateCopyData.restype = CFDataRef
-
-    Security.SecCopyErrorMessageString.argtypes = [OSStatus, c_void_p]
-    Security.SecCopyErrorMessageString.restype = CFStringRef
-
-    Security.SecIdentityCreateWithCertificate.argtypes = [
-        CFTypeRef,
-        SecCertificateRef,
-        POINTER(SecIdentityRef),
-    ]
-    Security.SecIdentityCreateWithCertificate.restype = OSStatus
-
-    Security.SecKeychainCreate.argtypes = [
-        c_char_p,
-        c_uint32,
-        c_void_p,
-        Boolean,
-        c_void_p,
-        POINTER(SecKeychainRef),
-    ]
-    Security.SecKeychainCreate.restype = OSStatus
-
-    Security.SecKeychainDelete.argtypes = [SecKeychainRef]
-    Security.SecKeychainDelete.restype = OSStatus
-
-    Security.SecPKCS12Import.argtypes = [
-        CFDataRef,
-        CFDictionaryRef,
-        POINTER(CFArrayRef),
-    ]
-    Security.SecPKCS12Import.restype = OSStatus
-
-    SSLReadFunc = CFUNCTYPE(OSStatus, SSLConnectionRef, c_void_p, POINTER(c_size_t))
-    SSLWriteFunc = CFUNCTYPE(
-        OSStatus, SSLConnectionRef, POINTER(c_byte), POINTER(c_size_t)
-    )
-
-    Security.SSLSetIOFuncs.argtypes = [SSLContextRef, SSLReadFunc, SSLWriteFunc]
-    Security.SSLSetIOFuncs.restype = OSStatus
-
-    Security.SSLSetPeerID.argtypes = [SSLContextRef, c_char_p, c_size_t]
-    Security.SSLSetPeerID.restype = OSStatus
-
-    Security.SSLSetCertificate.argtypes = [SSLContextRef, CFArrayRef]
-    Security.SSLSetCertificate.restype = OSStatus
-
-    Security.SSLSetCertificateAuthorities.argtypes = [SSLContextRef, CFTypeRef, Boolean]
-    Security.SSLSetCertificateAuthorities.restype = OSStatus
-
-    Security.SSLSetConnection.argtypes = [SSLContextRef, SSLConnectionRef]
-    Security.SSLSetConnection.restype = OSStatus
-
-    Security.SSLSetPeerDomainName.argtypes = [SSLContextRef, c_char_p, c_size_t]
-    Security.SSLSetPeerDomainName.restype = OSStatus
-
-    Security.SSLHandshake.argtypes = [SSLContextRef]
-    Security.SSLHandshake.restype = OSStatus
-
-    Security.SSLRead.argtypes = [SSLContextRef, c_char_p, c_size_t, POINTER(c_size_t)]
-    Security.SSLRead.restype = OSStatus
-
-    Security.SSLWrite.argtypes = [SSLContextRef, c_char_p, c_size_t, POINTER(c_size_t)]
-    Security.SSLWrite.restype = OSStatus
-
-    Security.SSLClose.argtypes = [SSLContextRef]
-    Security.SSLClose.restype = OSStatus
-
-    Security.SSLGetNumberSupportedCiphers.argtypes = [SSLContextRef, POINTER(c_size_t)]
-    Security.SSLGetNumberSupportedCiphers.restype = OSStatus
-
-    Security.SSLGetSupportedCiphers.argtypes = [
-        SSLContextRef,
-        POINTER(SSLCipherSuite),
-        POINTER(c_size_t),
-    ]
-    Security.SSLGetSupportedCiphers.restype = OSStatus
-
-    Security.SSLSetEnabledCiphers.argtypes = [
-        SSLContextRef,
-        POINTER(SSLCipherSuite),
-        c_size_t,
-    ]
-    Security.SSLSetEnabledCiphers.restype = OSStatus
-
-    Security.SSLGetNumberEnabledCiphers.argtype = [SSLContextRef, POINTER(c_size_t)]
-    Security.SSLGetNumberEnabledCiphers.restype = OSStatus
-
-    Security.SSLGetEnabledCiphers.argtypes = [
-        SSLContextRef,
-        POINTER(SSLCipherSuite),
-        POINTER(c_size_t),
-    ]
-    Security.SSLGetEnabledCiphers.restype = OSStatus
-
-    Security.SSLGetNegotiatedCipher.argtypes = [SSLContextRef, POINTER(SSLCipherSuite)]
-    Security.SSLGetNegotiatedCipher.restype = OSStatus
-
-    Security.SSLGetNegotiatedProtocolVersion.argtypes = [
-        SSLContextRef,
-        POINTER(SSLProtocol),
-    ]
-    Security.SSLGetNegotiatedProtocolVersion.restype = OSStatus
-
-    Security.SSLCopyPeerTrust.argtypes = [SSLContextRef, POINTER(SecTrustRef)]
-    Security.SSLCopyPeerTrust.restype = OSStatus
-
-    Security.SecTrustSetAnchorCertificates.argtypes = [SecTrustRef, CFArrayRef]
-    Security.SecTrustSetAnchorCertificates.restype = OSStatus
-
-    Security.SecTrustSetAnchorCertificatesOnly.argstypes = [SecTrustRef, Boolean]
-    Security.SecTrustSetAnchorCertificatesOnly.restype = OSStatus
-
-    Security.SecTrustEvaluate.argtypes = [SecTrustRef, POINTER(SecTrustResultType)]
-    Security.SecTrustEvaluate.restype = OSStatus
-
-    Security.SecTrustGetCertificateCount.argtypes = [SecTrustRef]
-    Security.SecTrustGetCertificateCount.restype = CFIndex
-
-    Security.SecTrustGetCertificateAtIndex.argtypes = [SecTrustRef, CFIndex]
-    Security.SecTrustGetCertificateAtIndex.restype = SecCertificateRef
-
-    Security.SSLCreateContext.argtypes = [
-        CFAllocatorRef,
-        SSLProtocolSide,
-        SSLConnectionType,
-    ]
-    Security.SSLCreateContext.restype = SSLContextRef
-
-    Security.SSLSetSessionOption.argtypes = [SSLContextRef, SSLSessionOption, Boolean]
-    Security.SSLSetSessionOption.restype = OSStatus
-
-    Security.SSLSetProtocolVersionMin.argtypes = [SSLContextRef, SSLProtocol]
-    Security.SSLSetProtocolVersionMin.restype = OSStatus
-
-    Security.SSLSetProtocolVersionMax.argtypes = [SSLContextRef, SSLProtocol]
-    Security.SSLSetProtocolVersionMax.restype = OSStatus
-
-    Security.SecCopyErrorMessageString.argtypes = [OSStatus, c_void_p]
-    Security.SecCopyErrorMessageString.restype = CFStringRef
-
-    Security.SSLReadFunc = SSLReadFunc
-    Security.SSLWriteFunc = SSLWriteFunc
-    Security.SSLContextRef = SSLContextRef
-    Security.SSLProtocol = SSLProtocol
-    Security.SSLCipherSuite = SSLCipherSuite
-    Security.SecIdentityRef = SecIdentityRef
-    Security.SecKeychainRef = SecKeychainRef
-    Security.SecTrustRef = SecTrustRef
-    Security.SecTrustResultType = SecTrustResultType
-    Security.SecExternalFormat = SecExternalFormat
-    Security.OSStatus = OSStatus
-
-    Security.kSecImportExportPassphrase = CFStringRef.in_dll(
-        Security, "kSecImportExportPassphrase"
-    )
-    Security.kSecImportItemIdentity = CFStringRef.in_dll(
-        Security, "kSecImportItemIdentity"
-    )
-
-    # CoreFoundation time!
-    CoreFoundation.CFRetain.argtypes = [CFTypeRef]
-    CoreFoundation.CFRetain.restype = CFTypeRef
-
-    CoreFoundation.CFRelease.argtypes = [CFTypeRef]
-    CoreFoundation.CFRelease.restype = None
-
-    CoreFoundation.CFGetTypeID.argtypes = [CFTypeRef]
-    CoreFoundation.CFGetTypeID.restype = CFTypeID
-
-    CoreFoundation.CFStringCreateWithCString.argtypes = [
-        CFAllocatorRef,
-        c_char_p,
-        CFStringEncoding,
-    ]
-    CoreFoundation.CFStringCreateWithCString.restype = CFStringRef
-
-    CoreFoundation.CFStringGetCStringPtr.argtypes = [CFStringRef, CFStringEncoding]
-    CoreFoundation.CFStringGetCStringPtr.restype = c_char_p
-
-    CoreFoundation.CFStringGetCString.argtypes = [
-        CFStringRef,
-        c_char_p,
-        CFIndex,
-        CFStringEncoding,
-    ]
-    CoreFoundation.CFStringGetCString.restype = c_bool
-
-    CoreFoundation.CFDataCreate.argtypes = [CFAllocatorRef, c_char_p, CFIndex]
-    CoreFoundation.CFDataCreate.restype = CFDataRef
-
-    CoreFoundation.CFDataGetLength.argtypes = [CFDataRef]
-    CoreFoundation.CFDataGetLength.restype = CFIndex
-
-    CoreFoundation.CFDataGetBytePtr.argtypes = [CFDataRef]
-    CoreFoundation.CFDataGetBytePtr.restype = c_void_p
-
-    CoreFoundation.CFDictionaryCreate.argtypes = [
-        CFAllocatorRef,
-        POINTER(CFTypeRef),
-        POINTER(CFTypeRef),
-        CFIndex,
-        CFDictionaryKeyCallBacks,
-        CFDictionaryValueCallBacks,
-    ]
-    CoreFoundation.CFDictionaryCreate.restype = CFDictionaryRef
-
-    CoreFoundation.CFDictionaryGetValue.argtypes = [CFDictionaryRef, CFTypeRef]
-    CoreFoundation.CFDictionaryGetValue.restype = CFTypeRef
-
-    CoreFoundation.CFArrayCreate.argtypes = [
-        CFAllocatorRef,
-        POINTER(CFTypeRef),
-        CFIndex,
-        CFArrayCallBacks,
-    ]
-    CoreFoundation.CFArrayCreate.restype = CFArrayRef
-
-    CoreFoundation.CFArrayCreateMutable.argtypes = [
-        CFAllocatorRef,
-        CFIndex,
-        CFArrayCallBacks,
-    ]
-    CoreFoundation.CFArrayCreateMutable.restype = CFMutableArrayRef
-
-    CoreFoundation.CFArrayAppendValue.argtypes = [CFMutableArrayRef, c_void_p]
-    CoreFoundation.CFArrayAppendValue.restype = None
-
-    CoreFoundation.CFArrayGetCount.argtypes = [CFArrayRef]
-    CoreFoundation.CFArrayGetCount.restype = CFIndex
-
-    CoreFoundation.CFArrayGetValueAtIndex.argtypes = [CFArrayRef, CFIndex]
-    CoreFoundation.CFArrayGetValueAtIndex.restype = c_void_p
-
-    CoreFoundation.kCFAllocatorDefault = CFAllocatorRef.in_dll(
-        CoreFoundation, "kCFAllocatorDefault"
-    )
-    CoreFoundation.kCFTypeArrayCallBacks = c_void_p.in_dll(
-        CoreFoundation, "kCFTypeArrayCallBacks"
-    )
-    CoreFoundation.kCFTypeDictionaryKeyCallBacks = c_void_p.in_dll(
-        CoreFoundation, "kCFTypeDictionaryKeyCallBacks"
-    )
-    CoreFoundation.kCFTypeDictionaryValueCallBacks = c_void_p.in_dll(
-        CoreFoundation, "kCFTypeDictionaryValueCallBacks"
-    )
-
-    CoreFoundation.CFTypeRef = CFTypeRef
-    CoreFoundation.CFArrayRef = CFArrayRef
-    CoreFoundation.CFStringRef = CFStringRef
-    CoreFoundation.CFDictionaryRef = CFDictionaryRef
-
-except (AttributeError):
-    raise ImportError("Error initializing ctypes")
-
-
-class CFConst(object):
-    """
-    A class object that acts as essentially a namespace for CoreFoundation
-    constants.
-    """
-
-    kCFStringEncodingUTF8 = CFStringEncoding(0x08000100)
-
-
-class SecurityConst(object):
-    """
-    A class object that acts as essentially a namespace for Security constants.
-    """
-
-    kSSLSessionOptionBreakOnServerAuth = 0
-
-    kSSLProtocol2 = 1
-    kSSLProtocol3 = 2
-    kTLSProtocol1 = 4
-    kTLSProtocol11 = 7
-    kTLSProtocol12 = 8
-    # SecureTransport does not support TLS 1.3 even if there's a constant for it
-    kTLSProtocol13 = 10
-    kTLSProtocolMaxSupported = 999
-
-    kSSLClientSide = 1
-    kSSLStreamType = 0
-
-    kSecFormatPEMSequence = 10
-
-    kSecTrustResultInvalid = 0
-    kSecTrustResultProceed = 1
-    # This gap is present on purpose: this was kSecTrustResultConfirm, which
-    # is deprecated.
-    kSecTrustResultDeny = 3
-    kSecTrustResultUnspecified = 4
-    kSecTrustResultRecoverableTrustFailure = 5
-    kSecTrustResultFatalTrustFailure = 6
-    kSecTrustResultOtherError = 7
-
-    errSSLProtocol = -9800
-    errSSLWouldBlock = -9803
-    errSSLClosedGraceful = -9805
-    errSSLClosedNoNotify = -9816
-    errSSLClosedAbort = -9806
-
-    errSSLXCertChainInvalid = -9807
-    errSSLCrypto = -9809
-    errSSLInternal = -9810
-    errSSLCertExpired = -9814
-    errSSLCertNotYetValid = -9815
-    errSSLUnknownRootCert = -9812
-    errSSLNoRootCert = -9813
-    errSSLHostNameMismatch = -9843
-    errSSLPeerHandshakeFail = -9824
-    errSSLPeerUserCancelled = -9839
-    errSSLWeakPeerEphemeralDHKey = -9850
-    errSSLServerAuthCompleted = -9841
-    errSSLRecordOverflow = -9847
-
-    errSecVerifyFailed = -67808
-    errSecNoTrustSettings = -25263
-    errSecItemNotFound = -25300
-    errSecInvalidTrustSettings = -25262
-
-    # Cipher suites. We only pick the ones our default cipher string allows.
-    # Source: https://developer.apple.com/documentation/security/1550981-ssl_cipher_suite_values
-    TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 = 0xC02C
-    TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 = 0xC030
-    TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 = 0xC02B
-    TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 = 0xC02F
-    TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 = 0xCCA9
-    TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 = 0xCCA8
-    TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 = 0x009F
-    TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 = 0x009E
-    TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 = 0xC024
-    TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 = 0xC028
-    TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA = 0xC00A
-    TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA = 0xC014
-    TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 = 0x006B
-    TLS_DHE_RSA_WITH_AES_256_CBC_SHA = 0x0039
-    TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 = 0xC023
-    TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 = 0xC027
-    TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA = 0xC009
-    TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA = 0xC013
-    TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 = 0x0067
-    TLS_DHE_RSA_WITH_AES_128_CBC_SHA = 0x0033
-    TLS_RSA_WITH_AES_256_GCM_SHA384 = 0x009D
-    TLS_RSA_WITH_AES_128_GCM_SHA256 = 0x009C
-    TLS_RSA_WITH_AES_256_CBC_SHA256 = 0x003D
-    TLS_RSA_WITH_AES_128_CBC_SHA256 = 0x003C
-    TLS_RSA_WITH_AES_256_CBC_SHA = 0x0035
-    TLS_RSA_WITH_AES_128_CBC_SHA = 0x002F
-    TLS_AES_128_GCM_SHA256 = 0x1301
-    TLS_AES_256_GCM_SHA384 = 0x1302
-    TLS_AES_128_CCM_8_SHA256 = 0x1305
-    TLS_AES_128_CCM_SHA256 = 0x1304
diff --git a/venv/lib/python3.7/site-packages/urllib3/contrib/_securetransport/low_level.py b/venv/lib/python3.7/site-packages/urllib3/contrib/_securetransport/low_level.py
deleted file mode 100644
index e60168c..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/contrib/_securetransport/low_level.py
+++ /dev/null
@@ -1,328 +0,0 @@
-"""
-Low-level helpers for the SecureTransport bindings.
-
-These are Python functions that are not directly related to the high-level APIs
-but are necessary to get them to work. They include a whole bunch of low-level
-CoreFoundation messing about and memory management. The concerns in this module
-are almost entirely about trying to avoid memory leaks and providing
-appropriate and useful assistance to the higher-level code.
-"""
-import base64
-import ctypes
-import itertools
-import re
-import os
-import ssl
-import tempfile
-
-from .bindings import Security, CoreFoundation, CFConst
-
-
-# This regular expression is used to grab PEM data out of a PEM bundle.
-_PEM_CERTS_RE = re.compile(
-    b"-----BEGIN CERTIFICATE-----\n(.*?)\n-----END CERTIFICATE-----", re.DOTALL
-)
-
-
-def _cf_data_from_bytes(bytestring):
-    """
-    Given a bytestring, create a CFData object from it. This CFData object must
-    be CFReleased by the caller.
-    """
-    return CoreFoundation.CFDataCreate(
-        CoreFoundation.kCFAllocatorDefault, bytestring, len(bytestring)
-    )
-
-
-def _cf_dictionary_from_tuples(tuples):
-    """
-    Given a list of Python tuples, create an associated CFDictionary.
-    """
-    dictionary_size = len(tuples)
-
-    # We need to get the dictionary keys and values out in the same order.
-    keys = (t[0] for t in tuples)
-    values = (t[1] for t in tuples)
-    cf_keys = (CoreFoundation.CFTypeRef * dictionary_size)(*keys)
-    cf_values = (CoreFoundation.CFTypeRef * dictionary_size)(*values)
-
-    return CoreFoundation.CFDictionaryCreate(
-        CoreFoundation.kCFAllocatorDefault,
-        cf_keys,
-        cf_values,
-        dictionary_size,
-        CoreFoundation.kCFTypeDictionaryKeyCallBacks,
-        CoreFoundation.kCFTypeDictionaryValueCallBacks,
-    )
-
-
-def _cf_string_to_unicode(value):
-    """
-    Creates a Unicode string from a CFString object. Used entirely for error
-    reporting.
-
-    Yes, it annoys me quite a lot that this function is this complex.
-    """
-    value_as_void_p = ctypes.cast(value, ctypes.POINTER(ctypes.c_void_p))
-
-    string = CoreFoundation.CFStringGetCStringPtr(
-        value_as_void_p, CFConst.kCFStringEncodingUTF8
-    )
-    if string is None:
-        buffer = ctypes.create_string_buffer(1024)
-        result = CoreFoundation.CFStringGetCString(
-            value_as_void_p, buffer, 1024, CFConst.kCFStringEncodingUTF8
-        )
-        if not result:
-            raise OSError("Error copying C string from CFStringRef")
-        string = buffer.value
-    if string is not None:
-        string = string.decode("utf-8")
-    return string
-
-
-def _assert_no_error(error, exception_class=None):
-    """
-    Checks the return code and throws an exception if there is an error to
-    report
-    """
-    if error == 0:
-        return
-
-    cf_error_string = Security.SecCopyErrorMessageString(error, None)
-    output = _cf_string_to_unicode(cf_error_string)
-    CoreFoundation.CFRelease(cf_error_string)
-
-    if output is None or output == u"":
-        output = u"OSStatus %s" % error
-
-    if exception_class is None:
-        exception_class = ssl.SSLError
-
-    raise exception_class(output)
-
-
-def _cert_array_from_pem(pem_bundle):
-    """
-    Given a bundle of certs in PEM format, turns them into a CFArray of certs
-    that can be used to validate a cert chain.
-    """
-    # Normalize the PEM bundle's line endings.
-    pem_bundle = pem_bundle.replace(b"\r\n", b"\n")
-
-    der_certs = [
-        base64.b64decode(match.group(1)) for match in _PEM_CERTS_RE.finditer(pem_bundle)
-    ]
-    if not der_certs:
-        raise ssl.SSLError("No root certificates specified")
-
-    cert_array = CoreFoundation.CFArrayCreateMutable(
-        CoreFoundation.kCFAllocatorDefault,
-        0,
-        ctypes.byref(CoreFoundation.kCFTypeArrayCallBacks),
-    )
-    if not cert_array:
-        raise ssl.SSLError("Unable to allocate memory!")
-
-    try:
-        for der_bytes in der_certs:
-            certdata = _cf_data_from_bytes(der_bytes)
-            if not certdata:
-                raise ssl.SSLError("Unable to allocate memory!")
-            cert = Security.SecCertificateCreateWithData(
-                CoreFoundation.kCFAllocatorDefault, certdata
-            )
-            CoreFoundation.CFRelease(certdata)
-            if not cert:
-                raise ssl.SSLError("Unable to build cert object!")
-
-            CoreFoundation.CFArrayAppendValue(cert_array, cert)
-            CoreFoundation.CFRelease(cert)
-    except Exception:
-        # We need to free the array before the exception bubbles further.
-        # We only want to do that if an error occurs: otherwise, the caller
-        # should free.
-        CoreFoundation.CFRelease(cert_array)
-
-    return cert_array
-
-
-def _is_cert(item):
-    """
-    Returns True if a given CFTypeRef is a certificate.
-    """
-    expected = Security.SecCertificateGetTypeID()
-    return CoreFoundation.CFGetTypeID(item) == expected
-
-
-def _is_identity(item):
-    """
-    Returns True if a given CFTypeRef is an identity.
-    """
-    expected = Security.SecIdentityGetTypeID()
-    return CoreFoundation.CFGetTypeID(item) == expected
-
-
-def _temporary_keychain():
-    """
-    This function creates a temporary Mac keychain that we can use to work with
-    credentials. This keychain uses a one-time password and a temporary file to
-    store the data. We expect to have one keychain per socket. The returned
-    SecKeychainRef must be freed by the caller, including calling
-    SecKeychainDelete.
-
-    Returns a tuple of the SecKeychainRef and the path to the temporary
-    directory that contains it.
-    """
-    # Unfortunately, SecKeychainCreate requires a path to a keychain. This
-    # means we cannot use mkstemp to use a generic temporary file. Instead,
-    # we're going to create a temporary directory and a filename to use there.
-    # This filename will be 8 random bytes expanded into base64. We also need
-    # some random bytes to password-protect the keychain we're creating, so we
-    # ask for 40 random bytes.
-    random_bytes = os.urandom(40)
-    filename = base64.b16encode(random_bytes[:8]).decode("utf-8")
-    password = base64.b16encode(random_bytes[8:])  # Must be valid UTF-8
-    tempdirectory = tempfile.mkdtemp()
-
-    keychain_path = os.path.join(tempdirectory, filename).encode("utf-8")
-
-    # We now want to create the keychain itself.
-    keychain = Security.SecKeychainRef()
-    status = Security.SecKeychainCreate(
-        keychain_path, len(password), password, False, None, ctypes.byref(keychain)
-    )
-    _assert_no_error(status)
-
-    # Having created the keychain, we want to pass it off to the caller.
-    return keychain, tempdirectory
-
-
-def _load_items_from_file(keychain, path):
-    """
-    Given a single file, loads all the trust objects from it into arrays and
-    the keychain.
-    Returns a tuple of lists: the first list is a list of identities, the
-    second a list of certs.
-    """
-    certificates = []
-    identities = []
-    result_array = None
-
-    with open(path, "rb") as f:
-        raw_filedata = f.read()
-
-    try:
-        filedata = CoreFoundation.CFDataCreate(
-            CoreFoundation.kCFAllocatorDefault, raw_filedata, len(raw_filedata)
-        )
-        result_array = CoreFoundation.CFArrayRef()
-        result = Security.SecItemImport(
-            filedata,  # cert data
-            None,  # Filename, leaving it out for now
-            None,  # What the type of the file is, we don't care
-            None,  # what's in the file, we don't care
-            0,  # import flags
-            None,  # key params, can include passphrase in the future
-            keychain,  # The keychain to insert into
-            ctypes.byref(result_array),  # Results
-        )
-        _assert_no_error(result)
-
-        # A CFArray is not very useful to us as an intermediary
-        # representation, so we are going to extract the objects we want
-        # and then free the array. We don't need to keep hold of keys: the
-        # keychain already has them!
-        result_count = CoreFoundation.CFArrayGetCount(result_array)
-        for index in range(result_count):
-            item = CoreFoundation.CFArrayGetValueAtIndex(result_array, index)
-            item = ctypes.cast(item, CoreFoundation.CFTypeRef)
-
-            if _is_cert(item):
-                CoreFoundation.CFRetain(item)
-                certificates.append(item)
-            elif _is_identity(item):
-                CoreFoundation.CFRetain(item)
-                identities.append(item)
-    finally:
-        if result_array:
-            CoreFoundation.CFRelease(result_array)
-
-        CoreFoundation.CFRelease(filedata)
-
-    return (identities, certificates)
-
-
-def _load_client_cert_chain(keychain, *paths):
-    """
-    Load certificates and maybe keys from a number of files. Has the end goal
-    of returning a CFArray containing one SecIdentityRef, and then zero or more
-    SecCertificateRef objects, suitable for use as a client certificate trust
-    chain.
-    """
-    # Ok, the strategy.
-    #
-    # This relies on knowing that macOS will not give you a SecIdentityRef
-    # unless you have imported a key into a keychain. This is a somewhat
-    # artificial limitation of macOS (for example, it doesn't necessarily
-    # affect iOS), but there is nothing inside Security.framework that lets you
-    # get a SecIdentityRef without having a key in a keychain.
-    #
-    # So the policy here is we take all the files and iterate them in order.
-    # Each one will use SecItemImport to have one or more objects loaded from
-    # it. We will also point at a keychain that macOS can use to work with the
-    # private key.
-    #
-    # Once we have all the objects, we'll check what we actually have. If we
-    # already have a SecIdentityRef in hand, fab: we'll use that. Otherwise,
-    # we'll take the first certificate (which we assume to be our leaf) and
-    # ask the keychain to give us a SecIdentityRef with that cert's associated
-    # key.
-    #
-    # We'll then return a CFArray containing the trust chain: one
-    # SecIdentityRef and then zero-or-more SecCertificateRef objects. The
-    # responsibility for freeing this CFArray will be with the caller. This
-    # CFArray must remain alive for the entire connection, so in practice it
-    # will be stored with a single SSLSocket, along with the reference to the
-    # keychain.
-    certificates = []
-    identities = []
-
-    # Filter out bad paths.
-    paths = (path for path in paths if path)
-
-    try:
-        for file_path in paths:
-            new_identities, new_certs = _load_items_from_file(keychain, file_path)
-            identities.extend(new_identities)
-            certificates.extend(new_certs)
-
-        # Ok, we have everything. The question is: do we have an identity? If
-        # not, we want to grab one from the first cert we have.
-        if not identities:
-            new_identity = Security.SecIdentityRef()
-            status = Security.SecIdentityCreateWithCertificate(
-                keychain, certificates[0], ctypes.byref(new_identity)
-            )
-            _assert_no_error(status)
-            identities.append(new_identity)
-
-            # We now want to release the original certificate, as we no longer
-            # need it.
-            CoreFoundation.CFRelease(certificates.pop(0))
-
-        # We now need to build a new CFArray that holds the trust chain.
-        trust_chain = CoreFoundation.CFArrayCreateMutable(
-            CoreFoundation.kCFAllocatorDefault,
-            0,
-            ctypes.byref(CoreFoundation.kCFTypeArrayCallBacks),
-        )
-        for item in itertools.chain(identities, certificates):
-            # ArrayAppendValue does a CFRetain on the item. That's fine,
-            # because the finally block will release our other refs to them.
-            CoreFoundation.CFArrayAppendValue(trust_chain, item)
-
-        return trust_chain
-    finally:
-        for obj in itertools.chain(identities, certificates):
-            CoreFoundation.CFRelease(obj)
diff --git a/venv/lib/python3.7/site-packages/urllib3/contrib/appengine.py b/venv/lib/python3.7/site-packages/urllib3/contrib/appengine.py
deleted file mode 100644
index 9b7044f..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/contrib/appengine.py
+++ /dev/null
@@ -1,314 +0,0 @@
-"""
-This module provides a pool manager that uses Google App Engine's
-`URLFetch Service <https://cloud.google.com/appengine/docs/python/urlfetch>`_.
-
-Example usage::
-
-    from urllib3 import PoolManager
-    from urllib3.contrib.appengine import AppEngineManager, is_appengine_sandbox
-
-    if is_appengine_sandbox():
-        # AppEngineManager uses AppEngine's URLFetch API behind the scenes
-        http = AppEngineManager()
-    else:
-        # PoolManager uses a socket-level API behind the scenes
-        http = PoolManager()
-
-    r = http.request('GET', 'https://google.com/')
-
-There are `limitations <https://cloud.google.com/appengine/docs/python/\
-urlfetch/#Python_Quotas_and_limits>`_ to the URLFetch service and it may not be
-the best choice for your application. There are three options for using
-urllib3 on Google App Engine:
-
-1. You can use :class:`AppEngineManager` with URLFetch. URLFetch is
-   cost-effective in many circumstances as long as your usage is within the
-   limitations.
-2. You can use a normal :class:`~urllib3.PoolManager` by enabling sockets.
-   Sockets also have `limitations and restrictions
-   <https://cloud.google.com/appengine/docs/python/sockets/\
-   #limitations-and-restrictions>`_ and have a lower free quota than URLFetch.
-   To use sockets, be sure to specify the following in your ``app.yaml``::
-
-        env_variables:
-            GAE_USE_SOCKETS_HTTPLIB : 'true'
-
-3. If you are using `App Engine Flexible
-<https://cloud.google.com/appengine/docs/flexible/>`_, you can use the standard
-:class:`PoolManager` without any configuration or special environment variables.
-"""
-
-from __future__ import absolute_import
-import io
-import logging
-import warnings
-from ..packages.six.moves.urllib.parse import urljoin
-
-from ..exceptions import (
-    HTTPError,
-    HTTPWarning,
-    MaxRetryError,
-    ProtocolError,
-    TimeoutError,
-    SSLError,
-)
-
-from ..request import RequestMethods
-from ..response import HTTPResponse
-from ..util.timeout import Timeout
-from ..util.retry import Retry
-from . import _appengine_environ
-
-try:
-    from google.appengine.api import urlfetch
-except ImportError:
-    urlfetch = None
-
-
-log = logging.getLogger(__name__)
-
-
-class AppEnginePlatformWarning(HTTPWarning):
-    pass
-
-
-class AppEnginePlatformError(HTTPError):
-    pass
-
-
-class AppEngineManager(RequestMethods):
-    """
-    Connection manager for Google App Engine sandbox applications.
-
-    This manager uses the URLFetch service directly instead of using the
-    emulated httplib, and is subject to URLFetch limitations as described in
-    the App Engine documentation `here
-    <https://cloud.google.com/appengine/docs/python/urlfetch>`_.
-
-    Notably it will raise an :class:`AppEnginePlatformError` if:
-        * URLFetch is not available.
-        * If you attempt to use this on App Engine Flexible, as full socket
-          support is available.
-        * If a request size is more than 10 megabytes.
-        * If a response size is more than 32 megabtyes.
-        * If you use an unsupported request method such as OPTIONS.
-
-    Beyond those cases, it will raise normal urllib3 errors.
-    """
-
-    def __init__(
-        self,
-        headers=None,
-        retries=None,
-        validate_certificate=True,
-        urlfetch_retries=True,
-    ):
-        if not urlfetch:
-            raise AppEnginePlatformError(
-                "URLFetch is not available in this environment."
-            )
-
-        warnings.warn(
-            "urllib3 is using URLFetch on Google App Engine sandbox instead "
-            "of sockets. To use sockets directly instead of URLFetch see "
-            "https://urllib3.readthedocs.io/en/latest/reference/urllib3.contrib.html.",
-            AppEnginePlatformWarning,
-        )
-
-        RequestMethods.__init__(self, headers)
-        self.validate_certificate = validate_certificate
-        self.urlfetch_retries = urlfetch_retries
-
-        self.retries = retries or Retry.DEFAULT
-
-    def __enter__(self):
-        return self
-
-    def __exit__(self, exc_type, exc_val, exc_tb):
-        # Return False to re-raise any potential exceptions
-        return False
-
-    def urlopen(
-        self,
-        method,
-        url,
-        body=None,
-        headers=None,
-        retries=None,
-        redirect=True,
-        timeout=Timeout.DEFAULT_TIMEOUT,
-        **response_kw
-    ):
-
-        retries = self._get_retries(retries, redirect)
-
-        try:
-            follow_redirects = redirect and retries.redirect != 0 and retries.total
-            response = urlfetch.fetch(
-                url,
-                payload=body,
-                method=method,
-                headers=headers or {},
-                allow_truncated=False,
-                follow_redirects=self.urlfetch_retries and follow_redirects,
-                deadline=self._get_absolute_timeout(timeout),
-                validate_certificate=self.validate_certificate,
-            )
-        except urlfetch.DeadlineExceededError as e:
-            raise TimeoutError(self, e)
-
-        except urlfetch.InvalidURLError as e:
-            if "too large" in str(e):
-                raise AppEnginePlatformError(
-                    "URLFetch request too large, URLFetch only "
-                    "supports requests up to 10mb in size.",
-                    e,
-                )
-            raise ProtocolError(e)
-
-        except urlfetch.DownloadError as e:
-            if "Too many redirects" in str(e):
-                raise MaxRetryError(self, url, reason=e)
-            raise ProtocolError(e)
-
-        except urlfetch.ResponseTooLargeError as e:
-            raise AppEnginePlatformError(
-                "URLFetch response too large, URLFetch only supports"
-                "responses up to 32mb in size.",
-                e,
-            )
-
-        except urlfetch.SSLCertificateError as e:
-            raise SSLError(e)
-
-        except urlfetch.InvalidMethodError as e:
-            raise AppEnginePlatformError(
-                "URLFetch does not support method: %s" % method, e
-            )
-
-        http_response = self._urlfetch_response_to_http_response(
-            response, retries=retries, **response_kw
-        )
-
-        # Handle redirect?
-        redirect_location = redirect and http_response.get_redirect_location()
-        if redirect_location:
-            # Check for redirect response
-            if self.urlfetch_retries and retries.raise_on_redirect:
-                raise MaxRetryError(self, url, "too many redirects")
-            else:
-                if http_response.status == 303:
-                    method = "GET"
-
-                try:
-                    retries = retries.increment(
-                        method, url, response=http_response, _pool=self
-                    )
-                except MaxRetryError:
-                    if retries.raise_on_redirect:
-                        raise MaxRetryError(self, url, "too many redirects")
-                    return http_response
-
-                retries.sleep_for_retry(http_response)
-                log.debug("Redirecting %s -> %s", url, redirect_location)
-                redirect_url = urljoin(url, redirect_location)
-                return self.urlopen(
-                    method,
-                    redirect_url,
-                    body,
-                    headers,
-                    retries=retries,
-                    redirect=redirect,
-                    timeout=timeout,
-                    **response_kw
-                )
-
-        # Check if we should retry the HTTP response.
-        has_retry_after = bool(http_response.getheader("Retry-After"))
-        if retries.is_retry(method, http_response.status, has_retry_after):
-            retries = retries.increment(method, url, response=http_response, _pool=self)
-            log.debug("Retry: %s", url)
-            retries.sleep(http_response)
-            return self.urlopen(
-                method,
-                url,
-                body=body,
-                headers=headers,
-                retries=retries,
-                redirect=redirect,
-                timeout=timeout,
-                **response_kw
-            )
-
-        return http_response
-
-    def _urlfetch_response_to_http_response(self, urlfetch_resp, **response_kw):
-
-        if is_prod_appengine():
-            # Production GAE handles deflate encoding automatically, but does
-            # not remove the encoding header.
-            content_encoding = urlfetch_resp.headers.get("content-encoding")
-
-            if content_encoding == "deflate":
-                del urlfetch_resp.headers["content-encoding"]
-
-        transfer_encoding = urlfetch_resp.headers.get("transfer-encoding")
-        # We have a full response's content,
-        # so let's make sure we don't report ourselves as chunked data.
-        if transfer_encoding == "chunked":
-            encodings = transfer_encoding.split(",")
-            encodings.remove("chunked")
-            urlfetch_resp.headers["transfer-encoding"] = ",".join(encodings)
-
-        original_response = HTTPResponse(
-            # In order for decoding to work, we must present the content as
-            # a file-like object.
-            body=io.BytesIO(urlfetch_resp.content),
-            msg=urlfetch_resp.header_msg,
-            headers=urlfetch_resp.headers,
-            status=urlfetch_resp.status_code,
-            **response_kw
-        )
-
-        return HTTPResponse(
-            body=io.BytesIO(urlfetch_resp.content),
-            headers=urlfetch_resp.headers,
-            status=urlfetch_resp.status_code,
-            original_response=original_response,
-            **response_kw
-        )
-
-    def _get_absolute_timeout(self, timeout):
-        if timeout is Timeout.DEFAULT_TIMEOUT:
-            return None  # Defer to URLFetch's default.
-        if isinstance(timeout, Timeout):
-            if timeout._read is not None or timeout._connect is not None:
-                warnings.warn(
-                    "URLFetch does not support granular timeout settings, "
-                    "reverting to total or default URLFetch timeout.",
-                    AppEnginePlatformWarning,
-                )
-            return timeout.total
-        return timeout
-
-    def _get_retries(self, retries, redirect):
-        if not isinstance(retries, Retry):
-            retries = Retry.from_int(retries, redirect=redirect, default=self.retries)
-
-        if retries.connect or retries.read or retries.redirect:
-            warnings.warn(
-                "URLFetch only supports total retries and does not "
-                "recognize connect, read, or redirect retry parameters.",
-                AppEnginePlatformWarning,
-            )
-
-        return retries
-
-
-# Alias methods from _appengine_environ to maintain public API interface.
-
-is_appengine = _appengine_environ.is_appengine
-is_appengine_sandbox = _appengine_environ.is_appengine_sandbox
-is_local_appengine = _appengine_environ.is_local_appengine
-is_prod_appengine = _appengine_environ.is_prod_appengine
-is_prod_appengine_mvms = _appengine_environ.is_prod_appengine_mvms
diff --git a/venv/lib/python3.7/site-packages/urllib3/contrib/ntlmpool.py b/venv/lib/python3.7/site-packages/urllib3/contrib/ntlmpool.py
deleted file mode 100644
index 1fd242a..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/contrib/ntlmpool.py
+++ /dev/null
@@ -1,121 +0,0 @@
-"""
-NTLM authenticating pool, contributed by erikcederstran
-
-Issue #10, see: http://code.google.com/p/urllib3/issues/detail?id=10
-"""
-from __future__ import absolute_import
-
-from logging import getLogger
-from ntlm import ntlm
-
-from .. import HTTPSConnectionPool
-from ..packages.six.moves.http_client import HTTPSConnection
-
-
-log = getLogger(__name__)
-
-
-class NTLMConnectionPool(HTTPSConnectionPool):
-    """
-    Implements an NTLM authentication version of an urllib3 connection pool
-    """
-
-    scheme = "https"
-
-    def __init__(self, user, pw, authurl, *args, **kwargs):
-        """
-        authurl is a random URL on the server that is protected by NTLM.
-        user is the Windows user, probably in the DOMAIN\\username format.
-        pw is the password for the user.
-        """
-        super(NTLMConnectionPool, self).__init__(*args, **kwargs)
-        self.authurl = authurl
-        self.rawuser = user
-        user_parts = user.split("\\", 1)
-        self.domain = user_parts[0].upper()
-        self.user = user_parts[1]
-        self.pw = pw
-
-    def _new_conn(self):
-        # Performs the NTLM handshake that secures the connection. The socket
-        # must be kept open while requests are performed.
-        self.num_connections += 1
-        log.debug(
-            "Starting NTLM HTTPS connection no. %d: https://%s%s",
-            self.num_connections,
-            self.host,
-            self.authurl,
-        )
-
-        headers = {"Connection": "Keep-Alive"}
-        req_header = "Authorization"
-        resp_header = "www-authenticate"
-
-        conn = HTTPSConnection(host=self.host, port=self.port)
-
-        # Send negotiation message
-        headers[req_header] = "NTLM %s" % ntlm.create_NTLM_NEGOTIATE_MESSAGE(
-            self.rawuser
-        )
-        log.debug("Request headers: %s", headers)
-        conn.request("GET", self.authurl, None, headers)
-        res = conn.getresponse()
-        reshdr = dict(res.getheaders())
-        log.debug("Response status: %s %s", res.status, res.reason)
-        log.debug("Response headers: %s", reshdr)
-        log.debug("Response data: %s [...]", res.read(100))
-
-        # Remove the reference to the socket, so that it can not be closed by
-        # the response object (we want to keep the socket open)
-        res.fp = None
-
-        # Server should respond with a challenge message
-        auth_header_values = reshdr[resp_header].split(", ")
-        auth_header_value = None
-        for s in auth_header_values:
-            if s[:5] == "NTLM ":
-                auth_header_value = s[5:]
-        if auth_header_value is None:
-            raise Exception(
-                "Unexpected %s response header: %s" % (resp_header, reshdr[resp_header])
-            )
-
-        # Send authentication message
-        ServerChallenge, NegotiateFlags = ntlm.parse_NTLM_CHALLENGE_MESSAGE(
-            auth_header_value
-        )
-        auth_msg = ntlm.create_NTLM_AUTHENTICATE_MESSAGE(
-            ServerChallenge, self.user, self.domain, self.pw, NegotiateFlags
-        )
-        headers[req_header] = "NTLM %s" % auth_msg
-        log.debug("Request headers: %s", headers)
-        conn.request("GET", self.authurl, None, headers)
-        res = conn.getresponse()
-        log.debug("Response status: %s %s", res.status, res.reason)
-        log.debug("Response headers: %s", dict(res.getheaders()))
-        log.debug("Response data: %s [...]", res.read()[:100])
-        if res.status != 200:
-            if res.status == 401:
-                raise Exception("Server rejected request: wrong username or password")
-            raise Exception("Wrong server response: %s %s" % (res.status, res.reason))
-
-        res.fp = None
-        log.debug("Connection established")
-        return conn
-
-    def urlopen(
-        self,
-        method,
-        url,
-        body=None,
-        headers=None,
-        retries=3,
-        redirect=True,
-        assert_same_host=True,
-    ):
-        if headers is None:
-            headers = {}
-        headers["Connection"] = "Keep-Alive"
-        return super(NTLMConnectionPool, self).urlopen(
-            method, url, body, headers, retries, redirect, assert_same_host
-        )
diff --git a/venv/lib/python3.7/site-packages/urllib3/contrib/pyopenssl.py b/venv/lib/python3.7/site-packages/urllib3/contrib/pyopenssl.py
deleted file mode 100644
index 3051ef3..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/contrib/pyopenssl.py
+++ /dev/null
@@ -1,498 +0,0 @@
-"""
-SSL with SNI_-support for Python 2. Follow these instructions if you would
-like to verify SSL certificates in Python 2. Note, the default libraries do
-*not* do certificate checking; you need to do additional work to validate
-certificates yourself.
-
-This needs the following packages installed:
-
-* pyOpenSSL (tested with 16.0.0)
-* cryptography (minimum 1.3.4, from pyopenssl)
-* idna (minimum 2.0, from cryptography)
-
-However, pyopenssl depends on cryptography, which depends on idna, so while we
-use all three directly here we end up having relatively few packages required.
-
-You can install them with the following command:
-
-    pip install pyopenssl cryptography idna
-
-To activate certificate checking, call
-:func:`~urllib3.contrib.pyopenssl.inject_into_urllib3` from your Python code
-before you begin making HTTP requests. This can be done in a ``sitecustomize``
-module, or at any other time before your application begins using ``urllib3``,
-like this::
-
-    try:
-        import urllib3.contrib.pyopenssl
-        urllib3.contrib.pyopenssl.inject_into_urllib3()
-    except ImportError:
-        pass
-
-Now you can use :mod:`urllib3` as you normally would, and it will support SNI
-when the required modules are installed.
-
-Activating this module also has the positive side effect of disabling SSL/TLS
-compression in Python 2 (see `CRIME attack`_).
-
-If you want to configure the default list of supported cipher suites, you can
-set the ``urllib3.contrib.pyopenssl.DEFAULT_SSL_CIPHER_LIST`` variable.
-
-.. _sni: https://en.wikipedia.org/wiki/Server_Name_Indication
-.. _crime attack: https://en.wikipedia.org/wiki/CRIME_(security_exploit)
-"""
-from __future__ import absolute_import
-
-import OpenSSL.SSL
-from cryptography import x509
-from cryptography.hazmat.backends.openssl import backend as openssl_backend
-from cryptography.hazmat.backends.openssl.x509 import _Certificate
-
-try:
-    from cryptography.x509 import UnsupportedExtension
-except ImportError:
-    # UnsupportedExtension is gone in cryptography >= 2.1.0
-    class UnsupportedExtension(Exception):
-        pass
-
-
-from socket import timeout, error as SocketError
-from io import BytesIO
-
-try:  # Platform-specific: Python 2
-    from socket import _fileobject
-except ImportError:  # Platform-specific: Python 3
-    _fileobject = None
-    from ..packages.backports.makefile import backport_makefile
-
-import logging
-import ssl
-from ..packages import six
-import sys
-
-from .. import util
-
-
-__all__ = ["inject_into_urllib3", "extract_from_urllib3"]
-
-# SNI always works.
-HAS_SNI = True
-
-# Map from urllib3 to PyOpenSSL compatible parameter-values.
-_openssl_versions = {
-    util.PROTOCOL_TLS: OpenSSL.SSL.SSLv23_METHOD,
-    ssl.PROTOCOL_TLSv1: OpenSSL.SSL.TLSv1_METHOD,
-}
-
-if hasattr(ssl, "PROTOCOL_SSLv3") and hasattr(OpenSSL.SSL, "SSLv3_METHOD"):
-    _openssl_versions[ssl.PROTOCOL_SSLv3] = OpenSSL.SSL.SSLv3_METHOD
-
-if hasattr(ssl, "PROTOCOL_TLSv1_1") and hasattr(OpenSSL.SSL, "TLSv1_1_METHOD"):
-    _openssl_versions[ssl.PROTOCOL_TLSv1_1] = OpenSSL.SSL.TLSv1_1_METHOD
-
-if hasattr(ssl, "PROTOCOL_TLSv1_2") and hasattr(OpenSSL.SSL, "TLSv1_2_METHOD"):
-    _openssl_versions[ssl.PROTOCOL_TLSv1_2] = OpenSSL.SSL.TLSv1_2_METHOD
-
-
-_stdlib_to_openssl_verify = {
-    ssl.CERT_NONE: OpenSSL.SSL.VERIFY_NONE,
-    ssl.CERT_OPTIONAL: OpenSSL.SSL.VERIFY_PEER,
-    ssl.CERT_REQUIRED: OpenSSL.SSL.VERIFY_PEER
-    + OpenSSL.SSL.VERIFY_FAIL_IF_NO_PEER_CERT,
-}
-_openssl_to_stdlib_verify = dict((v, k) for k, v in _stdlib_to_openssl_verify.items())
-
-# OpenSSL will only write 16K at a time
-SSL_WRITE_BLOCKSIZE = 16384
-
-orig_util_HAS_SNI = util.HAS_SNI
-orig_util_SSLContext = util.ssl_.SSLContext
-
-
-log = logging.getLogger(__name__)
-
-
-def inject_into_urllib3():
-    "Monkey-patch urllib3 with PyOpenSSL-backed SSL-support."
-
-    _validate_dependencies_met()
-
-    util.SSLContext = PyOpenSSLContext
-    util.ssl_.SSLContext = PyOpenSSLContext
-    util.HAS_SNI = HAS_SNI
-    util.ssl_.HAS_SNI = HAS_SNI
-    util.IS_PYOPENSSL = True
-    util.ssl_.IS_PYOPENSSL = True
-
-
-def extract_from_urllib3():
-    "Undo monkey-patching by :func:`inject_into_urllib3`."
-
-    util.SSLContext = orig_util_SSLContext
-    util.ssl_.SSLContext = orig_util_SSLContext
-    util.HAS_SNI = orig_util_HAS_SNI
-    util.ssl_.HAS_SNI = orig_util_HAS_SNI
-    util.IS_PYOPENSSL = False
-    util.ssl_.IS_PYOPENSSL = False
-
-
-def _validate_dependencies_met():
-    """
-    Verifies that PyOpenSSL's package-level dependencies have been met.
-    Throws `ImportError` if they are not met.
-    """
-    # Method added in `cryptography==1.1`; not available in older versions
-    from cryptography.x509.extensions import Extensions
-
-    if getattr(Extensions, "get_extension_for_class", None) is None:
-        raise ImportError(
-            "'cryptography' module missing required functionality.  "
-            "Try upgrading to v1.3.4 or newer."
-        )
-
-    # pyOpenSSL 0.14 and above use cryptography for OpenSSL bindings. The _x509
-    # attribute is only present on those versions.
-    from OpenSSL.crypto import X509
-
-    x509 = X509()
-    if getattr(x509, "_x509", None) is None:
-        raise ImportError(
-            "'pyOpenSSL' module missing required functionality. "
-            "Try upgrading to v0.14 or newer."
-        )
-
-
-def _dnsname_to_stdlib(name):
-    """
-    Converts a dNSName SubjectAlternativeName field to the form used by the
-    standard library on the given Python version.
-
-    Cryptography produces a dNSName as a unicode string that was idna-decoded
-    from ASCII bytes. We need to idna-encode that string to get it back, and
-    then on Python 3 we also need to convert to unicode via UTF-8 (the stdlib
-    uses PyUnicode_FromStringAndSize on it, which decodes via UTF-8).
-
-    If the name cannot be idna-encoded then we return None signalling that
-    the name given should be skipped.
-    """
-
-    def idna_encode(name):
-        """
-        Borrowed wholesale from the Python Cryptography Project. It turns out
-        that we can't just safely call `idna.encode`: it can explode for
-        wildcard names. This avoids that problem.
-        """
-        import idna
-
-        try:
-            for prefix in [u"*.", u"."]:
-                if name.startswith(prefix):
-                    name = name[len(prefix) :]
-                    return prefix.encode("ascii") + idna.encode(name)
-            return idna.encode(name)
-        except idna.core.IDNAError:
-            return None
-
-    # Don't send IPv6 addresses through the IDNA encoder.
-    if ":" in name:
-        return name
-
-    name = idna_encode(name)
-    if name is None:
-        return None
-    elif sys.version_info >= (3, 0):
-        name = name.decode("utf-8")
-    return name
-
-
-def get_subj_alt_name(peer_cert):
-    """
-    Given an PyOpenSSL certificate, provides all the subject alternative names.
-    """
-    # Pass the cert to cryptography, which has much better APIs for this.
-    if hasattr(peer_cert, "to_cryptography"):
-        cert = peer_cert.to_cryptography()
-    else:
-        # This is technically using private APIs, but should work across all
-        # relevant versions before PyOpenSSL got a proper API for this.
-        cert = _Certificate(openssl_backend, peer_cert._x509)
-
-    # We want to find the SAN extension. Ask Cryptography to locate it (it's
-    # faster than looping in Python)
-    try:
-        ext = cert.extensions.get_extension_for_class(x509.SubjectAlternativeName).value
-    except x509.ExtensionNotFound:
-        # No such extension, return the empty list.
-        return []
-    except (
-        x509.DuplicateExtension,
-        UnsupportedExtension,
-        x509.UnsupportedGeneralNameType,
-        UnicodeError,
-    ) as e:
-        # A problem has been found with the quality of the certificate. Assume
-        # no SAN field is present.
-        log.warning(
-            "A problem was encountered with the certificate that prevented "
-            "urllib3 from finding the SubjectAlternativeName field. This can "
-            "affect certificate validation. The error was %s",
-            e,
-        )
-        return []
-
-    # We want to return dNSName and iPAddress fields. We need to cast the IPs
-    # back to strings because the match_hostname function wants them as
-    # strings.
-    # Sadly the DNS names need to be idna encoded and then, on Python 3, UTF-8
-    # decoded. This is pretty frustrating, but that's what the standard library
-    # does with certificates, and so we need to attempt to do the same.
-    # We also want to skip over names which cannot be idna encoded.
-    names = [
-        ("DNS", name)
-        for name in map(_dnsname_to_stdlib, ext.get_values_for_type(x509.DNSName))
-        if name is not None
-    ]
-    names.extend(
-        ("IP Address", str(name)) for name in ext.get_values_for_type(x509.IPAddress)
-    )
-
-    return names
-
-
-class WrappedSocket(object):
-    """API-compatibility wrapper for Python OpenSSL's Connection-class.
-
-    Note: _makefile_refs, _drop() and _reuse() are needed for the garbage
-    collector of pypy.
-    """
-
-    def __init__(self, connection, socket, suppress_ragged_eofs=True):
-        self.connection = connection
-        self.socket = socket
-        self.suppress_ragged_eofs = suppress_ragged_eofs
-        self._makefile_refs = 0
-        self._closed = False
-
-    def fileno(self):
-        return self.socket.fileno()
-
-    # Copy-pasted from Python 3.5 source code
-    def _decref_socketios(self):
-        if self._makefile_refs > 0:
-            self._makefile_refs -= 1
-        if self._closed:
-            self.close()
-
-    def recv(self, *args, **kwargs):
-        try:
-            data = self.connection.recv(*args, **kwargs)
-        except OpenSSL.SSL.SysCallError as e:
-            if self.suppress_ragged_eofs and e.args == (-1, "Unexpected EOF"):
-                return b""
-            else:
-                raise SocketError(str(e))
-        except OpenSSL.SSL.ZeroReturnError:
-            if self.connection.get_shutdown() == OpenSSL.SSL.RECEIVED_SHUTDOWN:
-                return b""
-            else:
-                raise
-        except OpenSSL.SSL.WantReadError:
-            if not util.wait_for_read(self.socket, self.socket.gettimeout()):
-                raise timeout("The read operation timed out")
-            else:
-                return self.recv(*args, **kwargs)
-
-        # TLS 1.3 post-handshake authentication
-        except OpenSSL.SSL.Error as e:
-            raise ssl.SSLError("read error: %r" % e)
-        else:
-            return data
-
-    def recv_into(self, *args, **kwargs):
-        try:
-            return self.connection.recv_into(*args, **kwargs)
-        except OpenSSL.SSL.SysCallError as e:
-            if self.suppress_ragged_eofs and e.args == (-1, "Unexpected EOF"):
-                return 0
-            else:
-                raise SocketError(str(e))
-        except OpenSSL.SSL.ZeroReturnError:
-            if self.connection.get_shutdown() == OpenSSL.SSL.RECEIVED_SHUTDOWN:
-                return 0
-            else:
-                raise
-        except OpenSSL.SSL.WantReadError:
-            if not util.wait_for_read(self.socket, self.socket.gettimeout()):
-                raise timeout("The read operation timed out")
-            else:
-                return self.recv_into(*args, **kwargs)
-
-        # TLS 1.3 post-handshake authentication
-        except OpenSSL.SSL.Error as e:
-            raise ssl.SSLError("read error: %r" % e)
-
-    def settimeout(self, timeout):
-        return self.socket.settimeout(timeout)
-
-    def _send_until_done(self, data):
-        while True:
-            try:
-                return self.connection.send(data)
-            except OpenSSL.SSL.WantWriteError:
-                if not util.wait_for_write(self.socket, self.socket.gettimeout()):
-                    raise timeout()
-                continue
-            except OpenSSL.SSL.SysCallError as e:
-                raise SocketError(str(e))
-
-    def sendall(self, data):
-        total_sent = 0
-        while total_sent < len(data):
-            sent = self._send_until_done(
-                data[total_sent : total_sent + SSL_WRITE_BLOCKSIZE]
-            )
-            total_sent += sent
-
-    def shutdown(self):
-        # FIXME rethrow compatible exceptions should we ever use this
-        self.connection.shutdown()
-
-    def close(self):
-        if self._makefile_refs < 1:
-            try:
-                self._closed = True
-                return self.connection.close()
-            except OpenSSL.SSL.Error:
-                return
-        else:
-            self._makefile_refs -= 1
-
-    def getpeercert(self, binary_form=False):
-        x509 = self.connection.get_peer_certificate()
-
-        if not x509:
-            return x509
-
-        if binary_form:
-            return OpenSSL.crypto.dump_certificate(OpenSSL.crypto.FILETYPE_ASN1, x509)
-
-        return {
-            "subject": ((("commonName", x509.get_subject().CN),),),
-            "subjectAltName": get_subj_alt_name(x509),
-        }
-
-    def version(self):
-        return self.connection.get_protocol_version_name()
-
-    def _reuse(self):
-        self._makefile_refs += 1
-
-    def _drop(self):
-        if self._makefile_refs < 1:
-            self.close()
-        else:
-            self._makefile_refs -= 1
-
-
-if _fileobject:  # Platform-specific: Python 2
-
-    def makefile(self, mode, bufsize=-1):
-        self._makefile_refs += 1
-        return _fileobject(self, mode, bufsize, close=True)
-
-
-else:  # Platform-specific: Python 3
-    makefile = backport_makefile
-
-WrappedSocket.makefile = makefile
-
-
-class PyOpenSSLContext(object):
-    """
-    I am a wrapper class for the PyOpenSSL ``Context`` object. I am responsible
-    for translating the interface of the standard library ``SSLContext`` object
-    to calls into PyOpenSSL.
-    """
-
-    def __init__(self, protocol):
-        self.protocol = _openssl_versions[protocol]
-        self._ctx = OpenSSL.SSL.Context(self.protocol)
-        self._options = 0
-        self.check_hostname = False
-
-    @property
-    def options(self):
-        return self._options
-
-    @options.setter
-    def options(self, value):
-        self._options = value
-        self._ctx.set_options(value)
-
-    @property
-    def verify_mode(self):
-        return _openssl_to_stdlib_verify[self._ctx.get_verify_mode()]
-
-    @verify_mode.setter
-    def verify_mode(self, value):
-        self._ctx.set_verify(_stdlib_to_openssl_verify[value], _verify_callback)
-
-    def set_default_verify_paths(self):
-        self._ctx.set_default_verify_paths()
-
-    def set_ciphers(self, ciphers):
-        if isinstance(ciphers, six.text_type):
-            ciphers = ciphers.encode("utf-8")
-        self._ctx.set_cipher_list(ciphers)
-
-    def load_verify_locations(self, cafile=None, capath=None, cadata=None):
-        if cafile is not None:
-            cafile = cafile.encode("utf-8")
-        if capath is not None:
-            capath = capath.encode("utf-8")
-        self._ctx.load_verify_locations(cafile, capath)
-        if cadata is not None:
-            self._ctx.load_verify_locations(BytesIO(cadata))
-
-    def load_cert_chain(self, certfile, keyfile=None, password=None):
-        self._ctx.use_certificate_chain_file(certfile)
-        if password is not None:
-            if not isinstance(password, six.binary_type):
-                password = password.encode("utf-8")
-            self._ctx.set_passwd_cb(lambda *_: password)
-        self._ctx.use_privatekey_file(keyfile or certfile)
-
-    def wrap_socket(
-        self,
-        sock,
-        server_side=False,
-        do_handshake_on_connect=True,
-        suppress_ragged_eofs=True,
-        server_hostname=None,
-    ):
-        cnx = OpenSSL.SSL.Connection(self._ctx, sock)
-
-        if isinstance(server_hostname, six.text_type):  # Platform-specific: Python 3
-            server_hostname = server_hostname.encode("utf-8")
-
-        if server_hostname is not None:
-            cnx.set_tlsext_host_name(server_hostname)
-
-        cnx.set_connect_state()
-
-        while True:
-            try:
-                cnx.do_handshake()
-            except OpenSSL.SSL.WantReadError:
-                if not util.wait_for_read(sock, sock.gettimeout()):
-                    raise timeout("select timed out")
-                continue
-            except OpenSSL.SSL.Error as e:
-                raise ssl.SSLError("bad handshake: %r" % e)
-            break
-
-        return WrappedSocket(cnx, sock)
-
-
-def _verify_callback(cnx, x509, err_no, err_depth, return_code):
-    return err_no == 0
diff --git a/venv/lib/python3.7/site-packages/urllib3/contrib/securetransport.py b/venv/lib/python3.7/site-packages/urllib3/contrib/securetransport.py
deleted file mode 100644
index 87d844a..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/contrib/securetransport.py
+++ /dev/null
@@ -1,859 +0,0 @@
-"""
-SecureTranport support for urllib3 via ctypes.
-
-This makes platform-native TLS available to urllib3 users on macOS without the
-use of a compiler. This is an important feature because the Python Package
-Index is moving to become a TLSv1.2-or-higher server, and the default OpenSSL
-that ships with macOS is not capable of doing TLSv1.2. The only way to resolve
-this is to give macOS users an alternative solution to the problem, and that
-solution is to use SecureTransport.
-
-We use ctypes here because this solution must not require a compiler. That's
-because pip is not allowed to require a compiler either.
-
-This is not intended to be a seriously long-term solution to this problem.
-The hope is that PEP 543 will eventually solve this issue for us, at which
-point we can retire this contrib module. But in the short term, we need to
-solve the impending tire fire that is Python on Mac without this kind of
-contrib module. So...here we are.
-
-To use this module, simply import and inject it::
-
-    import urllib3.contrib.securetransport
-    urllib3.contrib.securetransport.inject_into_urllib3()
-
-Happy TLSing!
-
-This code is a bastardised version of the code found in Will Bond's oscrypto
-library. An enormous debt is owed to him for blazing this trail for us. For
-that reason, this code should be considered to be covered both by urllib3's
-license and by oscrypto's:
-
-    Copyright (c) 2015-2016 Will Bond <will@wbond.net>
-
-    Permission is hereby granted, free of charge, to any person obtaining a
-    copy of this software and associated documentation files (the "Software"),
-    to deal in the Software without restriction, including without limitation
-    the rights to use, copy, modify, merge, publish, distribute, sublicense,
-    and/or sell copies of the Software, and to permit persons to whom the
-    Software is furnished to do so, subject to the following conditions:
-
-    The above copyright notice and this permission notice shall be included in
-    all copies or substantial portions of the Software.
-
-    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
-    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-    DEALINGS IN THE SOFTWARE.
-"""
-from __future__ import absolute_import
-
-import contextlib
-import ctypes
-import errno
-import os.path
-import shutil
-import socket
-import ssl
-import threading
-import weakref
-
-from .. import util
-from ._securetransport.bindings import Security, SecurityConst, CoreFoundation
-from ._securetransport.low_level import (
-    _assert_no_error,
-    _cert_array_from_pem,
-    _temporary_keychain,
-    _load_client_cert_chain,
-)
-
-try:  # Platform-specific: Python 2
-    from socket import _fileobject
-except ImportError:  # Platform-specific: Python 3
-    _fileobject = None
-    from ..packages.backports.makefile import backport_makefile
-
-__all__ = ["inject_into_urllib3", "extract_from_urllib3"]
-
-# SNI always works
-HAS_SNI = True
-
-orig_util_HAS_SNI = util.HAS_SNI
-orig_util_SSLContext = util.ssl_.SSLContext
-
-# This dictionary is used by the read callback to obtain a handle to the
-# calling wrapped socket. This is a pretty silly approach, but for now it'll
-# do. I feel like I should be able to smuggle a handle to the wrapped socket
-# directly in the SSLConnectionRef, but for now this approach will work I
-# guess.
-#
-# We need to lock around this structure for inserts, but we don't do it for
-# reads/writes in the callbacks. The reasoning here goes as follows:
-#
-#    1. It is not possible to call into the callbacks before the dictionary is
-#       populated, so once in the callback the id must be in the dictionary.
-#    2. The callbacks don't mutate the dictionary, they only read from it, and
-#       so cannot conflict with any of the insertions.
-#
-# This is good: if we had to lock in the callbacks we'd drastically slow down
-# the performance of this code.
-_connection_refs = weakref.WeakValueDictionary()
-_connection_ref_lock = threading.Lock()
-
-# Limit writes to 16kB. This is OpenSSL's limit, but we'll cargo-cult it over
-# for no better reason than we need *a* limit, and this one is right there.
-SSL_WRITE_BLOCKSIZE = 16384
-
-# This is our equivalent of util.ssl_.DEFAULT_CIPHERS, but expanded out to
-# individual cipher suites. We need to do this because this is how
-# SecureTransport wants them.
-CIPHER_SUITES = [
-    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
-    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
-    SecurityConst.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
-    SecurityConst.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
-    SecurityConst.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,
-    SecurityConst.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
-    SecurityConst.TLS_DHE_RSA_WITH_AES_256_GCM_SHA384,
-    SecurityConst.TLS_DHE_RSA_WITH_AES_128_GCM_SHA256,
-    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384,
-    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
-    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,
-    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
-    SecurityConst.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384,
-    SecurityConst.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
-    SecurityConst.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
-    SecurityConst.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
-    SecurityConst.TLS_DHE_RSA_WITH_AES_256_CBC_SHA256,
-    SecurityConst.TLS_DHE_RSA_WITH_AES_256_CBC_SHA,
-    SecurityConst.TLS_DHE_RSA_WITH_AES_128_CBC_SHA256,
-    SecurityConst.TLS_DHE_RSA_WITH_AES_128_CBC_SHA,
-    SecurityConst.TLS_AES_256_GCM_SHA384,
-    SecurityConst.TLS_AES_128_GCM_SHA256,
-    SecurityConst.TLS_RSA_WITH_AES_256_GCM_SHA384,
-    SecurityConst.TLS_RSA_WITH_AES_128_GCM_SHA256,
-    SecurityConst.TLS_AES_128_CCM_8_SHA256,
-    SecurityConst.TLS_AES_128_CCM_SHA256,
-    SecurityConst.TLS_RSA_WITH_AES_256_CBC_SHA256,
-    SecurityConst.TLS_RSA_WITH_AES_128_CBC_SHA256,
-    SecurityConst.TLS_RSA_WITH_AES_256_CBC_SHA,
-    SecurityConst.TLS_RSA_WITH_AES_128_CBC_SHA,
-]
-
-# Basically this is simple: for PROTOCOL_SSLv23 we turn it into a low of
-# TLSv1 and a high of TLSv1.2. For everything else, we pin to that version.
-# TLSv1 to 1.2 are supported on macOS 10.8+
-_protocol_to_min_max = {
-    util.PROTOCOL_TLS: (SecurityConst.kTLSProtocol1, SecurityConst.kTLSProtocol12)
-}
-
-if hasattr(ssl, "PROTOCOL_SSLv2"):
-    _protocol_to_min_max[ssl.PROTOCOL_SSLv2] = (
-        SecurityConst.kSSLProtocol2,
-        SecurityConst.kSSLProtocol2,
-    )
-if hasattr(ssl, "PROTOCOL_SSLv3"):
-    _protocol_to_min_max[ssl.PROTOCOL_SSLv3] = (
-        SecurityConst.kSSLProtocol3,
-        SecurityConst.kSSLProtocol3,
-    )
-if hasattr(ssl, "PROTOCOL_TLSv1"):
-    _protocol_to_min_max[ssl.PROTOCOL_TLSv1] = (
-        SecurityConst.kTLSProtocol1,
-        SecurityConst.kTLSProtocol1,
-    )
-if hasattr(ssl, "PROTOCOL_TLSv1_1"):
-    _protocol_to_min_max[ssl.PROTOCOL_TLSv1_1] = (
-        SecurityConst.kTLSProtocol11,
-        SecurityConst.kTLSProtocol11,
-    )
-if hasattr(ssl, "PROTOCOL_TLSv1_2"):
-    _protocol_to_min_max[ssl.PROTOCOL_TLSv1_2] = (
-        SecurityConst.kTLSProtocol12,
-        SecurityConst.kTLSProtocol12,
-    )
-
-
-def inject_into_urllib3():
-    """
-    Monkey-patch urllib3 with SecureTransport-backed SSL-support.
-    """
-    util.SSLContext = SecureTransportContext
-    util.ssl_.SSLContext = SecureTransportContext
-    util.HAS_SNI = HAS_SNI
-    util.ssl_.HAS_SNI = HAS_SNI
-    util.IS_SECURETRANSPORT = True
-    util.ssl_.IS_SECURETRANSPORT = True
-
-
-def extract_from_urllib3():
-    """
-    Undo monkey-patching by :func:`inject_into_urllib3`.
-    """
-    util.SSLContext = orig_util_SSLContext
-    util.ssl_.SSLContext = orig_util_SSLContext
-    util.HAS_SNI = orig_util_HAS_SNI
-    util.ssl_.HAS_SNI = orig_util_HAS_SNI
-    util.IS_SECURETRANSPORT = False
-    util.ssl_.IS_SECURETRANSPORT = False
-
-
-def _read_callback(connection_id, data_buffer, data_length_pointer):
-    """
-    SecureTransport read callback. This is called by ST to request that data
-    be returned from the socket.
-    """
-    wrapped_socket = None
-    try:
-        wrapped_socket = _connection_refs.get(connection_id)
-        if wrapped_socket is None:
-            return SecurityConst.errSSLInternal
-        base_socket = wrapped_socket.socket
-
-        requested_length = data_length_pointer[0]
-
-        timeout = wrapped_socket.gettimeout()
-        error = None
-        read_count = 0
-
-        try:
-            while read_count < requested_length:
-                if timeout is None or timeout >= 0:
-                    if not util.wait_for_read(base_socket, timeout):
-                        raise socket.error(errno.EAGAIN, "timed out")
-
-                remaining = requested_length - read_count
-                buffer = (ctypes.c_char * remaining).from_address(
-                    data_buffer + read_count
-                )
-                chunk_size = base_socket.recv_into(buffer, remaining)
-                read_count += chunk_size
-                if not chunk_size:
-                    if not read_count:
-                        return SecurityConst.errSSLClosedGraceful
-                    break
-        except (socket.error) as e:
-            error = e.errno
-
-            if error is not None and error != errno.EAGAIN:
-                data_length_pointer[0] = read_count
-                if error == errno.ECONNRESET or error == errno.EPIPE:
-                    return SecurityConst.errSSLClosedAbort
-                raise
-
-        data_length_pointer[0] = read_count
-
-        if read_count != requested_length:
-            return SecurityConst.errSSLWouldBlock
-
-        return 0
-    except Exception as e:
-        if wrapped_socket is not None:
-            wrapped_socket._exception = e
-        return SecurityConst.errSSLInternal
-
-
-def _write_callback(connection_id, data_buffer, data_length_pointer):
-    """
-    SecureTransport write callback. This is called by ST to request that data
-    actually be sent on the network.
-    """
-    wrapped_socket = None
-    try:
-        wrapped_socket = _connection_refs.get(connection_id)
-        if wrapped_socket is None:
-            return SecurityConst.errSSLInternal
-        base_socket = wrapped_socket.socket
-
-        bytes_to_write = data_length_pointer[0]
-        data = ctypes.string_at(data_buffer, bytes_to_write)
-
-        timeout = wrapped_socket.gettimeout()
-        error = None
-        sent = 0
-
-        try:
-            while sent < bytes_to_write:
-                if timeout is None or timeout >= 0:
-                    if not util.wait_for_write(base_socket, timeout):
-                        raise socket.error(errno.EAGAIN, "timed out")
-                chunk_sent = base_socket.send(data)
-                sent += chunk_sent
-
-                # This has some needless copying here, but I'm not sure there's
-                # much value in optimising this data path.
-                data = data[chunk_sent:]
-        except (socket.error) as e:
-            error = e.errno
-
-            if error is not None and error != errno.EAGAIN:
-                data_length_pointer[0] = sent
-                if error == errno.ECONNRESET or error == errno.EPIPE:
-                    return SecurityConst.errSSLClosedAbort
-                raise
-
-        data_length_pointer[0] = sent
-
-        if sent != bytes_to_write:
-            return SecurityConst.errSSLWouldBlock
-
-        return 0
-    except Exception as e:
-        if wrapped_socket is not None:
-            wrapped_socket._exception = e
-        return SecurityConst.errSSLInternal
-
-
-# We need to keep these two objects references alive: if they get GC'd while
-# in use then SecureTransport could attempt to call a function that is in freed
-# memory. That would be...uh...bad. Yeah, that's the word. Bad.
-_read_callback_pointer = Security.SSLReadFunc(_read_callback)
-_write_callback_pointer = Security.SSLWriteFunc(_write_callback)
-
-
-class WrappedSocket(object):
-    """
-    API-compatibility wrapper for Python's OpenSSL wrapped socket object.
-
-    Note: _makefile_refs, _drop(), and _reuse() are needed for the garbage
-    collector of PyPy.
-    """
-
-    def __init__(self, socket):
-        self.socket = socket
-        self.context = None
-        self._makefile_refs = 0
-        self._closed = False
-        self._exception = None
-        self._keychain = None
-        self._keychain_dir = None
-        self._client_cert_chain = None
-
-        # We save off the previously-configured timeout and then set it to
-        # zero. This is done because we use select and friends to handle the
-        # timeouts, but if we leave the timeout set on the lower socket then
-        # Python will "kindly" call select on that socket again for us. Avoid
-        # that by forcing the timeout to zero.
-        self._timeout = self.socket.gettimeout()
-        self.socket.settimeout(0)
-
-    @contextlib.contextmanager
-    def _raise_on_error(self):
-        """
-        A context manager that can be used to wrap calls that do I/O from
-        SecureTransport. If any of the I/O callbacks hit an exception, this
-        context manager will correctly propagate the exception after the fact.
-        This avoids silently swallowing those exceptions.
-
-        It also correctly forces the socket closed.
-        """
-        self._exception = None
-
-        # We explicitly don't catch around this yield because in the unlikely
-        # event that an exception was hit in the block we don't want to swallow
-        # it.
-        yield
-        if self._exception is not None:
-            exception, self._exception = self._exception, None
-            self.close()
-            raise exception
-
-    def _set_ciphers(self):
-        """
-        Sets up the allowed ciphers. By default this matches the set in
-        util.ssl_.DEFAULT_CIPHERS, at least as supported by macOS. This is done
-        custom and doesn't allow changing at this time, mostly because parsing
-        OpenSSL cipher strings is going to be a freaking nightmare.
-        """
-        ciphers = (Security.SSLCipherSuite * len(CIPHER_SUITES))(*CIPHER_SUITES)
-        result = Security.SSLSetEnabledCiphers(
-            self.context, ciphers, len(CIPHER_SUITES)
-        )
-        _assert_no_error(result)
-
-    def _custom_validate(self, verify, trust_bundle):
-        """
-        Called when we have set custom validation. We do this in two cases:
-        first, when cert validation is entirely disabled; and second, when
-        using a custom trust DB.
-        """
-        # If we disabled cert validation, just say: cool.
-        if not verify:
-            return
-
-        # We want data in memory, so load it up.
-        if os.path.isfile(trust_bundle):
-            with open(trust_bundle, "rb") as f:
-                trust_bundle = f.read()
-
-        cert_array = None
-        trust = Security.SecTrustRef()
-
-        try:
-            # Get a CFArray that contains the certs we want.
-            cert_array = _cert_array_from_pem(trust_bundle)
-
-            # Ok, now the hard part. We want to get the SecTrustRef that ST has
-            # created for this connection, shove our CAs into it, tell ST to
-            # ignore everything else it knows, and then ask if it can build a
-            # chain. This is a buuuunch of code.
-            result = Security.SSLCopyPeerTrust(self.context, ctypes.byref(trust))
-            _assert_no_error(result)
-            if not trust:
-                raise ssl.SSLError("Failed to copy trust reference")
-
-            result = Security.SecTrustSetAnchorCertificates(trust, cert_array)
-            _assert_no_error(result)
-
-            result = Security.SecTrustSetAnchorCertificatesOnly(trust, True)
-            _assert_no_error(result)
-
-            trust_result = Security.SecTrustResultType()
-            result = Security.SecTrustEvaluate(trust, ctypes.byref(trust_result))
-            _assert_no_error(result)
-        finally:
-            if trust:
-                CoreFoundation.CFRelease(trust)
-
-            if cert_array is not None:
-                CoreFoundation.CFRelease(cert_array)
-
-        # Ok, now we can look at what the result was.
-        successes = (
-            SecurityConst.kSecTrustResultUnspecified,
-            SecurityConst.kSecTrustResultProceed,
-        )
-        if trust_result.value not in successes:
-            raise ssl.SSLError(
-                "certificate verify failed, error code: %d" % trust_result.value
-            )
-
-    def handshake(
-        self,
-        server_hostname,
-        verify,
-        trust_bundle,
-        min_version,
-        max_version,
-        client_cert,
-        client_key,
-        client_key_passphrase,
-    ):
-        """
-        Actually performs the TLS handshake. This is run automatically by
-        wrapped socket, and shouldn't be needed in user code.
-        """
-        # First, we do the initial bits of connection setup. We need to create
-        # a context, set its I/O funcs, and set the connection reference.
-        self.context = Security.SSLCreateContext(
-            None, SecurityConst.kSSLClientSide, SecurityConst.kSSLStreamType
-        )
-        result = Security.SSLSetIOFuncs(
-            self.context, _read_callback_pointer, _write_callback_pointer
-        )
-        _assert_no_error(result)
-
-        # Here we need to compute the handle to use. We do this by taking the
-        # id of self modulo 2**31 - 1. If this is already in the dictionary, we
-        # just keep incrementing by one until we find a free space.
-        with _connection_ref_lock:
-            handle = id(self) % 2147483647
-            while handle in _connection_refs:
-                handle = (handle + 1) % 2147483647
-            _connection_refs[handle] = self
-
-        result = Security.SSLSetConnection(self.context, handle)
-        _assert_no_error(result)
-
-        # If we have a server hostname, we should set that too.
-        if server_hostname:
-            if not isinstance(server_hostname, bytes):
-                server_hostname = server_hostname.encode("utf-8")
-
-            result = Security.SSLSetPeerDomainName(
-                self.context, server_hostname, len(server_hostname)
-            )
-            _assert_no_error(result)
-
-        # Setup the ciphers.
-        self._set_ciphers()
-
-        # Set the minimum and maximum TLS versions.
-        result = Security.SSLSetProtocolVersionMin(self.context, min_version)
-        _assert_no_error(result)
-
-        result = Security.SSLSetProtocolVersionMax(self.context, max_version)
-        _assert_no_error(result)
-
-        # If there's a trust DB, we need to use it. We do that by telling
-        # SecureTransport to break on server auth. We also do that if we don't
-        # want to validate the certs at all: we just won't actually do any
-        # authing in that case.
-        if not verify or trust_bundle is not None:
-            result = Security.SSLSetSessionOption(
-                self.context, SecurityConst.kSSLSessionOptionBreakOnServerAuth, True
-            )
-            _assert_no_error(result)
-
-        # If there's a client cert, we need to use it.
-        if client_cert:
-            self._keychain, self._keychain_dir = _temporary_keychain()
-            self._client_cert_chain = _load_client_cert_chain(
-                self._keychain, client_cert, client_key
-            )
-            result = Security.SSLSetCertificate(self.context, self._client_cert_chain)
-            _assert_no_error(result)
-
-        while True:
-            with self._raise_on_error():
-                result = Security.SSLHandshake(self.context)
-
-                if result == SecurityConst.errSSLWouldBlock:
-                    raise socket.timeout("handshake timed out")
-                elif result == SecurityConst.errSSLServerAuthCompleted:
-                    self._custom_validate(verify, trust_bundle)
-                    continue
-                else:
-                    _assert_no_error(result)
-                    break
-
-    def fileno(self):
-        return self.socket.fileno()
-
-    # Copy-pasted from Python 3.5 source code
-    def _decref_socketios(self):
-        if self._makefile_refs > 0:
-            self._makefile_refs -= 1
-        if self._closed:
-            self.close()
-
-    def recv(self, bufsiz):
-        buffer = ctypes.create_string_buffer(bufsiz)
-        bytes_read = self.recv_into(buffer, bufsiz)
-        data = buffer[:bytes_read]
-        return data
-
-    def recv_into(self, buffer, nbytes=None):
-        # Read short on EOF.
-        if self._closed:
-            return 0
-
-        if nbytes is None:
-            nbytes = len(buffer)
-
-        buffer = (ctypes.c_char * nbytes).from_buffer(buffer)
-        processed_bytes = ctypes.c_size_t(0)
-
-        with self._raise_on_error():
-            result = Security.SSLRead(
-                self.context, buffer, nbytes, ctypes.byref(processed_bytes)
-            )
-
-        # There are some result codes that we want to treat as "not always
-        # errors". Specifically, those are errSSLWouldBlock,
-        # errSSLClosedGraceful, and errSSLClosedNoNotify.
-        if result == SecurityConst.errSSLWouldBlock:
-            # If we didn't process any bytes, then this was just a time out.
-            # However, we can get errSSLWouldBlock in situations when we *did*
-            # read some data, and in those cases we should just read "short"
-            # and return.
-            if processed_bytes.value == 0:
-                # Timed out, no data read.
-                raise socket.timeout("recv timed out")
-        elif result in (
-            SecurityConst.errSSLClosedGraceful,
-            SecurityConst.errSSLClosedNoNotify,
-        ):
-            # The remote peer has closed this connection. We should do so as
-            # well. Note that we don't actually return here because in
-            # principle this could actually be fired along with return data.
-            # It's unlikely though.
-            self.close()
-        else:
-            _assert_no_error(result)
-
-        # Ok, we read and probably succeeded. We should return whatever data
-        # was actually read.
-        return processed_bytes.value
-
-    def settimeout(self, timeout):
-        self._timeout = timeout
-
-    def gettimeout(self):
-        return self._timeout
-
-    def send(self, data):
-        processed_bytes = ctypes.c_size_t(0)
-
-        with self._raise_on_error():
-            result = Security.SSLWrite(
-                self.context, data, len(data), ctypes.byref(processed_bytes)
-            )
-
-        if result == SecurityConst.errSSLWouldBlock and processed_bytes.value == 0:
-            # Timed out
-            raise socket.timeout("send timed out")
-        else:
-            _assert_no_error(result)
-
-        # We sent, and probably succeeded. Tell them how much we sent.
-        return processed_bytes.value
-
-    def sendall(self, data):
-        total_sent = 0
-        while total_sent < len(data):
-            sent = self.send(data[total_sent : total_sent + SSL_WRITE_BLOCKSIZE])
-            total_sent += sent
-
-    def shutdown(self):
-        with self._raise_on_error():
-            Security.SSLClose(self.context)
-
-    def close(self):
-        # TODO: should I do clean shutdown here? Do I have to?
-        if self._makefile_refs < 1:
-            self._closed = True
-            if self.context:
-                CoreFoundation.CFRelease(self.context)
-                self.context = None
-            if self._client_cert_chain:
-                CoreFoundation.CFRelease(self._client_cert_chain)
-                self._client_cert_chain = None
-            if self._keychain:
-                Security.SecKeychainDelete(self._keychain)
-                CoreFoundation.CFRelease(self._keychain)
-                shutil.rmtree(self._keychain_dir)
-                self._keychain = self._keychain_dir = None
-            return self.socket.close()
-        else:
-            self._makefile_refs -= 1
-
-    def getpeercert(self, binary_form=False):
-        # Urgh, annoying.
-        #
-        # Here's how we do this:
-        #
-        # 1. Call SSLCopyPeerTrust to get hold of the trust object for this
-        #    connection.
-        # 2. Call SecTrustGetCertificateAtIndex for index 0 to get the leaf.
-        # 3. To get the CN, call SecCertificateCopyCommonName and process that
-        #    string so that it's of the appropriate type.
-        # 4. To get the SAN, we need to do something a bit more complex:
-        #    a. Call SecCertificateCopyValues to get the data, requesting
-        #       kSecOIDSubjectAltName.
-        #    b. Mess about with this dictionary to try to get the SANs out.
-        #
-        # This is gross. Really gross. It's going to be a few hundred LoC extra
-        # just to repeat something that SecureTransport can *already do*. So my
-        # operating assumption at this time is that what we want to do is
-        # instead to just flag to urllib3 that it shouldn't do its own hostname
-        # validation when using SecureTransport.
-        if not binary_form:
-            raise ValueError("SecureTransport only supports dumping binary certs")
-        trust = Security.SecTrustRef()
-        certdata = None
-        der_bytes = None
-
-        try:
-            # Grab the trust store.
-            result = Security.SSLCopyPeerTrust(self.context, ctypes.byref(trust))
-            _assert_no_error(result)
-            if not trust:
-                # Probably we haven't done the handshake yet. No biggie.
-                return None
-
-            cert_count = Security.SecTrustGetCertificateCount(trust)
-            if not cert_count:
-                # Also a case that might happen if we haven't handshaked.
-                # Handshook? Handshaken?
-                return None
-
-            leaf = Security.SecTrustGetCertificateAtIndex(trust, 0)
-            assert leaf
-
-            # Ok, now we want the DER bytes.
-            certdata = Security.SecCertificateCopyData(leaf)
-            assert certdata
-
-            data_length = CoreFoundation.CFDataGetLength(certdata)
-            data_buffer = CoreFoundation.CFDataGetBytePtr(certdata)
-            der_bytes = ctypes.string_at(data_buffer, data_length)
-        finally:
-            if certdata:
-                CoreFoundation.CFRelease(certdata)
-            if trust:
-                CoreFoundation.CFRelease(trust)
-
-        return der_bytes
-
-    def version(self):
-        protocol = Security.SSLProtocol()
-        result = Security.SSLGetNegotiatedProtocolVersion(
-            self.context, ctypes.byref(protocol)
-        )
-        _assert_no_error(result)
-        if protocol.value == SecurityConst.kTLSProtocol13:
-            raise ssl.SSLError("SecureTransport does not support TLS 1.3")
-        elif protocol.value == SecurityConst.kTLSProtocol12:
-            return "TLSv1.2"
-        elif protocol.value == SecurityConst.kTLSProtocol11:
-            return "TLSv1.1"
-        elif protocol.value == SecurityConst.kTLSProtocol1:
-            return "TLSv1"
-        elif protocol.value == SecurityConst.kSSLProtocol3:
-            return "SSLv3"
-        elif protocol.value == SecurityConst.kSSLProtocol2:
-            return "SSLv2"
-        else:
-            raise ssl.SSLError("Unknown TLS version: %r" % protocol)
-
-    def _reuse(self):
-        self._makefile_refs += 1
-
-    def _drop(self):
-        if self._makefile_refs < 1:
-            self.close()
-        else:
-            self._makefile_refs -= 1
-
-
-if _fileobject:  # Platform-specific: Python 2
-
-    def makefile(self, mode, bufsize=-1):
-        self._makefile_refs += 1
-        return _fileobject(self, mode, bufsize, close=True)
-
-
-else:  # Platform-specific: Python 3
-
-    def makefile(self, mode="r", buffering=None, *args, **kwargs):
-        # We disable buffering with SecureTransport because it conflicts with
-        # the buffering that ST does internally (see issue #1153 for more).
-        buffering = 0
-        return backport_makefile(self, mode, buffering, *args, **kwargs)
-
-
-WrappedSocket.makefile = makefile
-
-
-class SecureTransportContext(object):
-    """
-    I am a wrapper class for the SecureTransport library, to translate the
-    interface of the standard library ``SSLContext`` object to calls into
-    SecureTransport.
-    """
-
-    def __init__(self, protocol):
-        self._min_version, self._max_version = _protocol_to_min_max[protocol]
-        self._options = 0
-        self._verify = False
-        self._trust_bundle = None
-        self._client_cert = None
-        self._client_key = None
-        self._client_key_passphrase = None
-
-    @property
-    def check_hostname(self):
-        """
-        SecureTransport cannot have its hostname checking disabled. For more,
-        see the comment on getpeercert() in this file.
-        """
-        return True
-
-    @check_hostname.setter
-    def check_hostname(self, value):
-        """
-        SecureTransport cannot have its hostname checking disabled. For more,
-        see the comment on getpeercert() in this file.
-        """
-        pass
-
-    @property
-    def options(self):
-        # TODO: Well, crap.
-        #
-        # So this is the bit of the code that is the most likely to cause us
-        # trouble. Essentially we need to enumerate all of the SSL options that
-        # users might want to use and try to see if we can sensibly translate
-        # them, or whether we should just ignore them.
-        return self._options
-
-    @options.setter
-    def options(self, value):
-        # TODO: Update in line with above.
-        self._options = value
-
-    @property
-    def verify_mode(self):
-        return ssl.CERT_REQUIRED if self._verify else ssl.CERT_NONE
-
-    @verify_mode.setter
-    def verify_mode(self, value):
-        self._verify = True if value == ssl.CERT_REQUIRED else False
-
-    def set_default_verify_paths(self):
-        # So, this has to do something a bit weird. Specifically, what it does
-        # is nothing.
-        #
-        # This means that, if we had previously had load_verify_locations
-        # called, this does not undo that. We need to do that because it turns
-        # out that the rest of the urllib3 code will attempt to load the
-        # default verify paths if it hasn't been told about any paths, even if
-        # the context itself was sometime earlier. We resolve that by just
-        # ignoring it.
-        pass
-
-    def load_default_certs(self):
-        return self.set_default_verify_paths()
-
-    def set_ciphers(self, ciphers):
-        # For now, we just require the default cipher string.
-        if ciphers != util.ssl_.DEFAULT_CIPHERS:
-            raise ValueError("SecureTransport doesn't support custom cipher strings")
-
-    def load_verify_locations(self, cafile=None, capath=None, cadata=None):
-        # OK, we only really support cadata and cafile.
-        if capath is not None:
-            raise ValueError("SecureTransport does not support cert directories")
-
-        self._trust_bundle = cafile or cadata
-
-    def load_cert_chain(self, certfile, keyfile=None, password=None):
-        self._client_cert = certfile
-        self._client_key = keyfile
-        self._client_cert_passphrase = password
-
-    def wrap_socket(
-        self,
-        sock,
-        server_side=False,
-        do_handshake_on_connect=True,
-        suppress_ragged_eofs=True,
-        server_hostname=None,
-    ):
-        # So, what do we do here? Firstly, we assert some properties. This is a
-        # stripped down shim, so there is some functionality we don't support.
-        # See PEP 543 for the real deal.
-        assert not server_side
-        assert do_handshake_on_connect
-        assert suppress_ragged_eofs
-
-        # Ok, we're good to go. Now we want to create the wrapped socket object
-        # and store it in the appropriate place.
-        wrapped_socket = WrappedSocket(sock)
-
-        # Now we can handshake
-        wrapped_socket.handshake(
-            server_hostname,
-            self._verify,
-            self._trust_bundle,
-            self._min_version,
-            self._max_version,
-            self._client_cert,
-            self._client_key,
-            self._client_key_passphrase,
-        )
-        return wrapped_socket
diff --git a/venv/lib/python3.7/site-packages/urllib3/contrib/socks.py b/venv/lib/python3.7/site-packages/urllib3/contrib/socks.py
deleted file mode 100644
index 9e97f7a..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/contrib/socks.py
+++ /dev/null
@@ -1,210 +0,0 @@
-# -*- coding: utf-8 -*-
-"""
-This module contains provisional support for SOCKS proxies from within
-urllib3. This module supports SOCKS4, SOCKS4A (an extension of SOCKS4), and
-SOCKS5. To enable its functionality, either install PySocks or install this
-module with the ``socks`` extra.
-
-The SOCKS implementation supports the full range of urllib3 features. It also
-supports the following SOCKS features:
-
-- SOCKS4A (``proxy_url='socks4a://...``)
-- SOCKS4 (``proxy_url='socks4://...``)
-- SOCKS5 with remote DNS (``proxy_url='socks5h://...``)
-- SOCKS5 with local DNS (``proxy_url='socks5://...``)
-- Usernames and passwords for the SOCKS proxy
-
- .. note::
-    It is recommended to use ``socks5h://`` or ``socks4a://`` schemes in
-    your ``proxy_url`` to ensure that DNS resolution is done from the remote
-    server instead of client-side when connecting to a domain name.
-
-SOCKS4 supports IPv4 and domain names with the SOCKS4A extension. SOCKS5
-supports IPv4, IPv6, and domain names.
-
-When connecting to a SOCKS4 proxy the ``username`` portion of the ``proxy_url``
-will be sent as the ``userid`` section of the SOCKS request::
-
-    proxy_url="socks4a://<userid>@proxy-host"
-
-When connecting to a SOCKS5 proxy the ``username`` and ``password`` portion
-of the ``proxy_url`` will be sent as the username/password to authenticate
-with the proxy::
-
-    proxy_url="socks5h://<username>:<password>@proxy-host"
-
-"""
-from __future__ import absolute_import
-
-try:
-    import socks
-except ImportError:
-    import warnings
-    from ..exceptions import DependencyWarning
-
-    warnings.warn(
-        (
-            "SOCKS support in urllib3 requires the installation of optional "
-            "dependencies: specifically, PySocks.  For more information, see "
-            "https://urllib3.readthedocs.io/en/latest/contrib.html#socks-proxies"
-        ),
-        DependencyWarning,
-    )
-    raise
-
-from socket import error as SocketError, timeout as SocketTimeout
-
-from ..connection import HTTPConnection, HTTPSConnection
-from ..connectionpool import HTTPConnectionPool, HTTPSConnectionPool
-from ..exceptions import ConnectTimeoutError, NewConnectionError
-from ..poolmanager import PoolManager
-from ..util.url import parse_url
-
-try:
-    import ssl
-except ImportError:
-    ssl = None
-
-
-class SOCKSConnection(HTTPConnection):
-    """
-    A plain-text HTTP connection that connects via a SOCKS proxy.
-    """
-
-    def __init__(self, *args, **kwargs):
-        self._socks_options = kwargs.pop("_socks_options")
-        super(SOCKSConnection, self).__init__(*args, **kwargs)
-
-    def _new_conn(self):
-        """
-        Establish a new connection via the SOCKS proxy.
-        """
-        extra_kw = {}
-        if self.source_address:
-            extra_kw["source_address"] = self.source_address
-
-        if self.socket_options:
-            extra_kw["socket_options"] = self.socket_options
-
-        try:
-            conn = socks.create_connection(
-                (self.host, self.port),
-                proxy_type=self._socks_options["socks_version"],
-                proxy_addr=self._socks_options["proxy_host"],
-                proxy_port=self._socks_options["proxy_port"],
-                proxy_username=self._socks_options["username"],
-                proxy_password=self._socks_options["password"],
-                proxy_rdns=self._socks_options["rdns"],
-                timeout=self.timeout,
-                **extra_kw
-            )
-
-        except SocketTimeout:
-            raise ConnectTimeoutError(
-                self,
-                "Connection to %s timed out. (connect timeout=%s)"
-                % (self.host, self.timeout),
-            )
-
-        except socks.ProxyError as e:
-            # This is fragile as hell, but it seems to be the only way to raise
-            # useful errors here.
-            if e.socket_err:
-                error = e.socket_err
-                if isinstance(error, SocketTimeout):
-                    raise ConnectTimeoutError(
-                        self,
-                        "Connection to %s timed out. (connect timeout=%s)"
-                        % (self.host, self.timeout),
-                    )
-                else:
-                    raise NewConnectionError(
-                        self, "Failed to establish a new connection: %s" % error
-                    )
-            else:
-                raise NewConnectionError(
-                    self, "Failed to establish a new connection: %s" % e
-                )
-
-        except SocketError as e:  # Defensive: PySocks should catch all these.
-            raise NewConnectionError(
-                self, "Failed to establish a new connection: %s" % e
-            )
-
-        return conn
-
-
-# We don't need to duplicate the Verified/Unverified distinction from
-# urllib3/connection.py here because the HTTPSConnection will already have been
-# correctly set to either the Verified or Unverified form by that module. This
-# means the SOCKSHTTPSConnection will automatically be the correct type.
-class SOCKSHTTPSConnection(SOCKSConnection, HTTPSConnection):
-    pass
-
-
-class SOCKSHTTPConnectionPool(HTTPConnectionPool):
-    ConnectionCls = SOCKSConnection
-
-
-class SOCKSHTTPSConnectionPool(HTTPSConnectionPool):
-    ConnectionCls = SOCKSHTTPSConnection
-
-
-class SOCKSProxyManager(PoolManager):
-    """
-    A version of the urllib3 ProxyManager that routes connections via the
-    defined SOCKS proxy.
-    """
-
-    pool_classes_by_scheme = {
-        "http": SOCKSHTTPConnectionPool,
-        "https": SOCKSHTTPSConnectionPool,
-    }
-
-    def __init__(
-        self,
-        proxy_url,
-        username=None,
-        password=None,
-        num_pools=10,
-        headers=None,
-        **connection_pool_kw
-    ):
-        parsed = parse_url(proxy_url)
-
-        if username is None and password is None and parsed.auth is not None:
-            split = parsed.auth.split(":")
-            if len(split) == 2:
-                username, password = split
-        if parsed.scheme == "socks5":
-            socks_version = socks.PROXY_TYPE_SOCKS5
-            rdns = False
-        elif parsed.scheme == "socks5h":
-            socks_version = socks.PROXY_TYPE_SOCKS5
-            rdns = True
-        elif parsed.scheme == "socks4":
-            socks_version = socks.PROXY_TYPE_SOCKS4
-            rdns = False
-        elif parsed.scheme == "socks4a":
-            socks_version = socks.PROXY_TYPE_SOCKS4
-            rdns = True
-        else:
-            raise ValueError("Unable to determine SOCKS version from %s" % proxy_url)
-
-        self.proxy_url = proxy_url
-
-        socks_options = {
-            "socks_version": socks_version,
-            "proxy_host": parsed.host,
-            "proxy_port": parsed.port,
-            "username": username,
-            "password": password,
-            "rdns": rdns,
-        }
-        connection_pool_kw["_socks_options"] = socks_options
-
-        super(SOCKSProxyManager, self).__init__(
-            num_pools, headers, **connection_pool_kw
-        )
-
-        self.pool_classes_by_scheme = SOCKSProxyManager.pool_classes_by_scheme
diff --git a/venv/lib/python3.7/site-packages/urllib3/exceptions.py b/venv/lib/python3.7/site-packages/urllib3/exceptions.py
deleted file mode 100644
index 0a74c79..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/exceptions.py
+++ /dev/null
@@ -1,255 +0,0 @@
-from __future__ import absolute_import
-from .packages.six.moves.http_client import IncompleteRead as httplib_IncompleteRead
-
-# Base Exceptions
-
-
-class HTTPError(Exception):
-    "Base exception used by this module."
-    pass
-
-
-class HTTPWarning(Warning):
-    "Base warning used by this module."
-    pass
-
-
-class PoolError(HTTPError):
-    "Base exception for errors caused within a pool."
-
-    def __init__(self, pool, message):
-        self.pool = pool
-        HTTPError.__init__(self, "%s: %s" % (pool, message))
-
-    def __reduce__(self):
-        # For pickling purposes.
-        return self.__class__, (None, None)
-
-
-class RequestError(PoolError):
-    "Base exception for PoolErrors that have associated URLs."
-
-    def __init__(self, pool, url, message):
-        self.url = url
-        PoolError.__init__(self, pool, message)
-
-    def __reduce__(self):
-        # For pickling purposes.
-        return self.__class__, (None, self.url, None)
-
-
-class SSLError(HTTPError):
-    "Raised when SSL certificate fails in an HTTPS connection."
-    pass
-
-
-class ProxyError(HTTPError):
-    "Raised when the connection to a proxy fails."
-    pass
-
-
-class DecodeError(HTTPError):
-    "Raised when automatic decoding based on Content-Type fails."
-    pass
-
-
-class ProtocolError(HTTPError):
-    "Raised when something unexpected happens mid-request/response."
-    pass
-
-
-#: Renamed to ProtocolError but aliased for backwards compatibility.
-ConnectionError = ProtocolError
-
-
-# Leaf Exceptions
-
-
-class MaxRetryError(RequestError):
-    """Raised when the maximum number of retries is exceeded.
-
-    :param pool: The connection pool
-    :type pool: :class:`~urllib3.connectionpool.HTTPConnectionPool`
-    :param string url: The requested Url
-    :param exceptions.Exception reason: The underlying error
-
-    """
-
-    def __init__(self, pool, url, reason=None):
-        self.reason = reason
-
-        message = "Max retries exceeded with url: %s (Caused by %r)" % (url, reason)
-
-        RequestError.__init__(self, pool, url, message)
-
-
-class HostChangedError(RequestError):
-    "Raised when an existing pool gets a request for a foreign host."
-
-    def __init__(self, pool, url, retries=3):
-        message = "Tried to open a foreign host with url: %s" % url
-        RequestError.__init__(self, pool, url, message)
-        self.retries = retries
-
-
-class TimeoutStateError(HTTPError):
-    """ Raised when passing an invalid state to a timeout """
-
-    pass
-
-
-class TimeoutError(HTTPError):
-    """ Raised when a socket timeout error occurs.
-
-    Catching this error will catch both :exc:`ReadTimeoutErrors
-    <ReadTimeoutError>` and :exc:`ConnectTimeoutErrors <ConnectTimeoutError>`.
-    """
-
-    pass
-
-
-class ReadTimeoutError(TimeoutError, RequestError):
-    "Raised when a socket timeout occurs while receiving data from a server"
-    pass
-
-
-# This timeout error does not have a URL attached and needs to inherit from the
-# base HTTPError
-class ConnectTimeoutError(TimeoutError):
-    "Raised when a socket timeout occurs while connecting to a server"
-    pass
-
-
-class NewConnectionError(ConnectTimeoutError, PoolError):
-    "Raised when we fail to establish a new connection. Usually ECONNREFUSED."
-    pass
-
-
-class EmptyPoolError(PoolError):
-    "Raised when a pool runs out of connections and no more are allowed."
-    pass
-
-
-class ClosedPoolError(PoolError):
-    "Raised when a request enters a pool after the pool has been closed."
-    pass
-
-
-class LocationValueError(ValueError, HTTPError):
-    "Raised when there is something wrong with a given URL input."
-    pass
-
-
-class LocationParseError(LocationValueError):
-    "Raised when get_host or similar fails to parse the URL input."
-
-    def __init__(self, location):
-        message = "Failed to parse: %s" % location
-        HTTPError.__init__(self, message)
-
-        self.location = location
-
-
-class ResponseError(HTTPError):
-    "Used as a container for an error reason supplied in a MaxRetryError."
-    GENERIC_ERROR = "too many error responses"
-    SPECIFIC_ERROR = "too many {status_code} error responses"
-
-
-class SecurityWarning(HTTPWarning):
-    "Warned when performing security reducing actions"
-    pass
-
-
-class SubjectAltNameWarning(SecurityWarning):
-    "Warned when connecting to a host with a certificate missing a SAN."
-    pass
-
-
-class InsecureRequestWarning(SecurityWarning):
-    "Warned when making an unverified HTTPS request."
-    pass
-
-
-class SystemTimeWarning(SecurityWarning):
-    "Warned when system time is suspected to be wrong"
-    pass
-
-
-class InsecurePlatformWarning(SecurityWarning):
-    "Warned when certain SSL configuration is not available on a platform."
-    pass
-
-
-class SNIMissingWarning(HTTPWarning):
-    "Warned when making a HTTPS request without SNI available."
-    pass
-
-
-class DependencyWarning(HTTPWarning):
-    """
-    Warned when an attempt is made to import a module with missing optional
-    dependencies.
-    """
-
-    pass
-
-
-class ResponseNotChunked(ProtocolError, ValueError):
-    "Response needs to be chunked in order to read it as chunks."
-    pass
-
-
-class BodyNotHttplibCompatible(HTTPError):
-    """
-    Body should be httplib.HTTPResponse like (have an fp attribute which
-    returns raw chunks) for read_chunked().
-    """
-
-    pass
-
-
-class IncompleteRead(HTTPError, httplib_IncompleteRead):
-    """
-    Response length doesn't match expected Content-Length
-
-    Subclass of http_client.IncompleteRead to allow int value
-    for `partial` to avoid creating large objects on streamed
-    reads.
-    """
-
-    def __init__(self, partial, expected):
-        super(IncompleteRead, self).__init__(partial, expected)
-
-    def __repr__(self):
-        return "IncompleteRead(%i bytes read, %i more expected)" % (
-            self.partial,
-            self.expected,
-        )
-
-
-class InvalidHeader(HTTPError):
-    "The header provided was somehow invalid."
-    pass
-
-
-class ProxySchemeUnknown(AssertionError, ValueError):
-    "ProxyManager does not support the supplied scheme"
-    # TODO(t-8ch): Stop inheriting from AssertionError in v2.0.
-
-    def __init__(self, scheme):
-        message = "Not supported proxy scheme %s" % scheme
-        super(ProxySchemeUnknown, self).__init__(message)
-
-
-class HeaderParsingError(HTTPError):
-    "Raised by assert_header_parsing, but we convert it to a log.warning statement."
-
-    def __init__(self, defects, unparsed_data):
-        message = "%s, unparsed data: %r" % (defects or "Unknown", unparsed_data)
-        super(HeaderParsingError, self).__init__(message)
-
-
-class UnrewindableBodyError(HTTPError):
-    "urllib3 encountered an error when trying to rewind a body"
-    pass
diff --git a/venv/lib/python3.7/site-packages/urllib3/fields.py b/venv/lib/python3.7/site-packages/urllib3/fields.py
deleted file mode 100644
index 8715b22..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/fields.py
+++ /dev/null
@@ -1,273 +0,0 @@
-from __future__ import absolute_import
-import email.utils
-import mimetypes
-import re
-
-from .packages import six
-
-
-def guess_content_type(filename, default="application/octet-stream"):
-    """
-    Guess the "Content-Type" of a file.
-
-    :param filename:
-        The filename to guess the "Content-Type" of using :mod:`mimetypes`.
-    :param default:
-        If no "Content-Type" can be guessed, default to `default`.
-    """
-    if filename:
-        return mimetypes.guess_type(filename)[0] or default
-    return default
-
-
-def format_header_param_rfc2231(name, value):
-    """
-    Helper function to format and quote a single header parameter using the
-    strategy defined in RFC 2231.
-
-    Particularly useful for header parameters which might contain
-    non-ASCII values, like file names. This follows RFC 2388 Section 4.4.
-
-    :param name:
-        The name of the parameter, a string expected to be ASCII only.
-    :param value:
-        The value of the parameter, provided as ``bytes`` or `str``.
-    :ret:
-        An RFC-2231-formatted unicode string.
-    """
-    if isinstance(value, six.binary_type):
-        value = value.decode("utf-8")
-
-    if not any(ch in value for ch in '"\\\r\n'):
-        result = u'%s="%s"' % (name, value)
-        try:
-            result.encode("ascii")
-        except (UnicodeEncodeError, UnicodeDecodeError):
-            pass
-        else:
-            return result
-
-    if six.PY2:  # Python 2:
-        value = value.encode("utf-8")
-
-    # encode_rfc2231 accepts an encoded string and returns an ascii-encoded
-    # string in Python 2 but accepts and returns unicode strings in Python 3
-    value = email.utils.encode_rfc2231(value, "utf-8")
-    value = "%s*=%s" % (name, value)
-
-    if six.PY2:  # Python 2:
-        value = value.decode("utf-8")
-
-    return value
-
-
-_HTML5_REPLACEMENTS = {
-    u"\u0022": u"%22",
-    # Replace "\" with "\\".
-    u"\u005C": u"\u005C\u005C",
-    u"\u005C": u"\u005C\u005C",
-}
-
-# All control characters from 0x00 to 0x1F *except* 0x1B.
-_HTML5_REPLACEMENTS.update(
-    {
-        six.unichr(cc): u"%{:02X}".format(cc)
-        for cc in range(0x00, 0x1F + 1)
-        if cc not in (0x1B,)
-    }
-)
-
-
-def _replace_multiple(value, needles_and_replacements):
-    def replacer(match):
-        return needles_and_replacements[match.group(0)]
-
-    pattern = re.compile(
-        r"|".join([re.escape(needle) for needle in needles_and_replacements.keys()])
-    )
-
-    result = pattern.sub(replacer, value)
-
-    return result
-
-
-def format_header_param_html5(name, value):
-    """
-    Helper function to format and quote a single header parameter using the
-    HTML5 strategy.
-
-    Particularly useful for header parameters which might contain
-    non-ASCII values, like file names. This follows the `HTML5 Working Draft
-    Section 4.10.22.7`_ and matches the behavior of curl and modern browsers.
-
-    .. _HTML5 Working Draft Section 4.10.22.7:
-        https://w3c.github.io/html/sec-forms.html#multipart-form-data
-
-    :param name:
-        The name of the parameter, a string expected to be ASCII only.
-    :param value:
-        The value of the parameter, provided as ``bytes`` or `str``.
-    :ret:
-        A unicode string, stripped of troublesome characters.
-    """
-    if isinstance(value, six.binary_type):
-        value = value.decode("utf-8")
-
-    value = _replace_multiple(value, _HTML5_REPLACEMENTS)
-
-    return u'%s="%s"' % (name, value)
-
-
-# For backwards-compatibility.
-format_header_param = format_header_param_html5
-
-
-class RequestField(object):
-    """
-    A data container for request body parameters.
-
-    :param name:
-        The name of this request field. Must be unicode.
-    :param data:
-        The data/value body.
-    :param filename:
-        An optional filename of the request field. Must be unicode.
-    :param headers:
-        An optional dict-like object of headers to initially use for the field.
-    :param header_formatter:
-        An optional callable that is used to encode and format the headers. By
-        default, this is :func:`format_header_param_html5`.
-    """
-
-    def __init__(
-        self,
-        name,
-        data,
-        filename=None,
-        headers=None,
-        header_formatter=format_header_param_html5,
-    ):
-        self._name = name
-        self._filename = filename
-        self.data = data
-        self.headers = {}
-        if headers:
-            self.headers = dict(headers)
-        self.header_formatter = header_formatter
-
-    @classmethod
-    def from_tuples(cls, fieldname, value, header_formatter=format_header_param_html5):
-        """
-        A :class:`~urllib3.fields.RequestField` factory from old-style tuple parameters.
-
-        Supports constructing :class:`~urllib3.fields.RequestField` from
-        parameter of key/value strings AND key/filetuple. A filetuple is a
-        (filename, data, MIME type) tuple where the MIME type is optional.
-        For example::
-
-            'foo': 'bar',
-            'fakefile': ('foofile.txt', 'contents of foofile'),
-            'realfile': ('barfile.txt', open('realfile').read()),
-            'typedfile': ('bazfile.bin', open('bazfile').read(), 'image/jpeg'),
-            'nonamefile': 'contents of nonamefile field',
-
-        Field names and filenames must be unicode.
-        """
-        if isinstance(value, tuple):
-            if len(value) == 3:
-                filename, data, content_type = value
-            else:
-                filename, data = value
-                content_type = guess_content_type(filename)
-        else:
-            filename = None
-            content_type = None
-            data = value
-
-        request_param = cls(
-            fieldname, data, filename=filename, header_formatter=header_formatter
-        )
-        request_param.make_multipart(content_type=content_type)
-
-        return request_param
-
-    def _render_part(self, name, value):
-        """
-        Overridable helper function to format a single header parameter. By
-        default, this calls ``self.header_formatter``.
-
-        :param name:
-            The name of the parameter, a string expected to be ASCII only.
-        :param value:
-            The value of the parameter, provided as a unicode string.
-        """
-
-        return self.header_formatter(name, value)
-
-    def _render_parts(self, header_parts):
-        """
-        Helper function to format and quote a single header.
-
-        Useful for single headers that are composed of multiple items. E.g.,
-        'Content-Disposition' fields.
-
-        :param header_parts:
-            A sequence of (k, v) tuples or a :class:`dict` of (k, v) to format
-            as `k1="v1"; k2="v2"; ...`.
-        """
-        parts = []
-        iterable = header_parts
-        if isinstance(header_parts, dict):
-            iterable = header_parts.items()
-
-        for name, value in iterable:
-            if value is not None:
-                parts.append(self._render_part(name, value))
-
-        return u"; ".join(parts)
-
-    def render_headers(self):
-        """
-        Renders the headers for this request field.
-        """
-        lines = []
-
-        sort_keys = ["Content-Disposition", "Content-Type", "Content-Location"]
-        for sort_key in sort_keys:
-            if self.headers.get(sort_key, False):
-                lines.append(u"%s: %s" % (sort_key, self.headers[sort_key]))
-
-        for header_name, header_value in self.headers.items():
-            if header_name not in sort_keys:
-                if header_value:
-                    lines.append(u"%s: %s" % (header_name, header_value))
-
-        lines.append(u"\r\n")
-        return u"\r\n".join(lines)
-
-    def make_multipart(
-        self, content_disposition=None, content_type=None, content_location=None
-    ):
-        """
-        Makes this request field into a multipart request field.
-
-        This method overrides "Content-Disposition", "Content-Type" and
-        "Content-Location" headers to the request parameter.
-
-        :param content_type:
-            The 'Content-Type' of the request body.
-        :param content_location:
-            The 'Content-Location' of the request body.
-
-        """
-        self.headers["Content-Disposition"] = content_disposition or u"form-data"
-        self.headers["Content-Disposition"] += u"; ".join(
-            [
-                u"",
-                self._render_parts(
-                    ((u"name", self._name), (u"filename", self._filename))
-                ),
-            ]
-        )
-        self.headers["Content-Type"] = content_type
-        self.headers["Content-Location"] = content_location
diff --git a/venv/lib/python3.7/site-packages/urllib3/filepost.py b/venv/lib/python3.7/site-packages/urllib3/filepost.py
deleted file mode 100644
index b7b0099..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/filepost.py
+++ /dev/null
@@ -1,98 +0,0 @@
-from __future__ import absolute_import
-import binascii
-import codecs
-import os
-
-from io import BytesIO
-
-from .packages import six
-from .packages.six import b
-from .fields import RequestField
-
-writer = codecs.lookup("utf-8")[3]
-
-
-def choose_boundary():
-    """
-    Our embarrassingly-simple replacement for mimetools.choose_boundary.
-    """
-    boundary = binascii.hexlify(os.urandom(16))
-    if not six.PY2:
-        boundary = boundary.decode("ascii")
-    return boundary
-
-
-def iter_field_objects(fields):
-    """
-    Iterate over fields.
-
-    Supports list of (k, v) tuples and dicts, and lists of
-    :class:`~urllib3.fields.RequestField`.
-
-    """
-    if isinstance(fields, dict):
-        i = six.iteritems(fields)
-    else:
-        i = iter(fields)
-
-    for field in i:
-        if isinstance(field, RequestField):
-            yield field
-        else:
-            yield RequestField.from_tuples(*field)
-
-
-def iter_fields(fields):
-    """
-    .. deprecated:: 1.6
-
-    Iterate over fields.
-
-    The addition of :class:`~urllib3.fields.RequestField` makes this function
-    obsolete. Instead, use :func:`iter_field_objects`, which returns
-    :class:`~urllib3.fields.RequestField` objects.
-
-    Supports list of (k, v) tuples and dicts.
-    """
-    if isinstance(fields, dict):
-        return ((k, v) for k, v in six.iteritems(fields))
-
-    return ((k, v) for k, v in fields)
-
-
-def encode_multipart_formdata(fields, boundary=None):
-    """
-    Encode a dictionary of ``fields`` using the multipart/form-data MIME format.
-
-    :param fields:
-        Dictionary of fields or list of (key, :class:`~urllib3.fields.RequestField`).
-
-    :param boundary:
-        If not specified, then a random boundary will be generated using
-        :func:`urllib3.filepost.choose_boundary`.
-    """
-    body = BytesIO()
-    if boundary is None:
-        boundary = choose_boundary()
-
-    for field in iter_field_objects(fields):
-        body.write(b("--%s\r\n" % (boundary)))
-
-        writer(body).write(field.render_headers())
-        data = field.data
-
-        if isinstance(data, int):
-            data = str(data)  # Backwards compatibility
-
-        if isinstance(data, six.text_type):
-            writer(body).write(data)
-        else:
-            body.write(data)
-
-        body.write(b"\r\n")
-
-    body.write(b("--%s--\r\n" % (boundary)))
-
-    content_type = str("multipart/form-data; boundary=%s" % boundary)
-
-    return body.getvalue(), content_type
diff --git a/venv/lib/python3.7/site-packages/urllib3/packages/__init__.py b/venv/lib/python3.7/site-packages/urllib3/packages/__init__.py
deleted file mode 100644
index fce4caa..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/packages/__init__.py
+++ /dev/null
@@ -1,5 +0,0 @@
-from __future__ import absolute_import
-
-from . import ssl_match_hostname
-
-__all__ = ("ssl_match_hostname",)
diff --git a/venv/lib/python3.7/site-packages/urllib3/packages/backports/__init__.py b/venv/lib/python3.7/site-packages/urllib3/packages/backports/__init__.py
deleted file mode 100644
index e69de29..0000000
diff --git a/venv/lib/python3.7/site-packages/urllib3/packages/backports/makefile.py b/venv/lib/python3.7/site-packages/urllib3/packages/backports/makefile.py
deleted file mode 100644
index a3156a6..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/packages/backports/makefile.py
+++ /dev/null
@@ -1,52 +0,0 @@
-# -*- coding: utf-8 -*-
-"""
-backports.makefile
-~~~~~~~~~~~~~~~~~~
-
-Backports the Python 3 ``socket.makefile`` method for use with anything that
-wants to create a "fake" socket object.
-"""
-import io
-
-from socket import SocketIO
-
-
-def backport_makefile(
-    self, mode="r", buffering=None, encoding=None, errors=None, newline=None
-):
-    """
-    Backport of ``socket.makefile`` from Python 3.5.
-    """
-    if not set(mode) <= {"r", "w", "b"}:
-        raise ValueError("invalid mode %r (only r, w, b allowed)" % (mode,))
-    writing = "w" in mode
-    reading = "r" in mode or not writing
-    assert reading or writing
-    binary = "b" in mode
-    rawmode = ""
-    if reading:
-        rawmode += "r"
-    if writing:
-        rawmode += "w"
-    raw = SocketIO(self, rawmode)
-    self._makefile_refs += 1
-    if buffering is None:
-        buffering = -1
-    if buffering < 0:
-        buffering = io.DEFAULT_BUFFER_SIZE
-    if buffering == 0:
-        if not binary:
-            raise ValueError("unbuffered streams must be binary")
-        return raw
-    if reading and writing:
-        buffer = io.BufferedRWPair(raw, raw, buffering)
-    elif reading:
-        buffer = io.BufferedReader(raw, buffering)
-    else:
-        assert writing
-        buffer = io.BufferedWriter(raw, buffering)
-    if binary:
-        return buffer
-    text = io.TextIOWrapper(buffer, encoding, errors, newline)
-    text.mode = mode
-    return text
diff --git a/venv/lib/python3.7/site-packages/urllib3/packages/six.py b/venv/lib/python3.7/site-packages/urllib3/packages/six.py
deleted file mode 100644
index 3144240..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/packages/six.py
+++ /dev/null
@@ -1,1021 +0,0 @@
-# Copyright (c) 2010-2019 Benjamin Peterson
-#
-# Permission is hereby granted, free of charge, to any person obtaining a copy
-# of this software and associated documentation files (the "Software"), to deal
-# in the Software without restriction, including without limitation the rights
-# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-# copies of the Software, and to permit persons to whom the Software is
-# furnished to do so, subject to the following conditions:
-#
-# The above copyright notice and this permission notice shall be included in all
-# copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-# SOFTWARE.
-
-"""Utilities for writing code that runs on Python 2 and 3"""
-
-from __future__ import absolute_import
-
-import functools
-import itertools
-import operator
-import sys
-import types
-
-__author__ = "Benjamin Peterson <benjamin@python.org>"
-__version__ = "1.12.0"
-
-
-# Useful for very coarse version differentiation.
-PY2 = sys.version_info[0] == 2
-PY3 = sys.version_info[0] == 3
-PY34 = sys.version_info[0:2] >= (3, 4)
-
-if PY3:
-    string_types = (str,)
-    integer_types = (int,)
-    class_types = (type,)
-    text_type = str
-    binary_type = bytes
-
-    MAXSIZE = sys.maxsize
-else:
-    string_types = (basestring,)
-    integer_types = (int, long)
-    class_types = (type, types.ClassType)
-    text_type = unicode
-    binary_type = str
-
-    if sys.platform.startswith("java"):
-        # Jython always uses 32 bits.
-        MAXSIZE = int((1 << 31) - 1)
-    else:
-        # It's possible to have sizeof(long) != sizeof(Py_ssize_t).
-        class X(object):
-            def __len__(self):
-                return 1 << 31
-
-        try:
-            len(X())
-        except OverflowError:
-            # 32-bit
-            MAXSIZE = int((1 << 31) - 1)
-        else:
-            # 64-bit
-            MAXSIZE = int((1 << 63) - 1)
-        del X
-
-
-def _add_doc(func, doc):
-    """Add documentation to a function."""
-    func.__doc__ = doc
-
-
-def _import_module(name):
-    """Import module, returning the module after the last dot."""
-    __import__(name)
-    return sys.modules[name]
-
-
-class _LazyDescr(object):
-    def __init__(self, name):
-        self.name = name
-
-    def __get__(self, obj, tp):
-        result = self._resolve()
-        setattr(obj, self.name, result)  # Invokes __set__.
-        try:
-            # This is a bit ugly, but it avoids running this again by
-            # removing this descriptor.
-            delattr(obj.__class__, self.name)
-        except AttributeError:
-            pass
-        return result
-
-
-class MovedModule(_LazyDescr):
-    def __init__(self, name, old, new=None):
-        super(MovedModule, self).__init__(name)
-        if PY3:
-            if new is None:
-                new = name
-            self.mod = new
-        else:
-            self.mod = old
-
-    def _resolve(self):
-        return _import_module(self.mod)
-
-    def __getattr__(self, attr):
-        _module = self._resolve()
-        value = getattr(_module, attr)
-        setattr(self, attr, value)
-        return value
-
-
-class _LazyModule(types.ModuleType):
-    def __init__(self, name):
-        super(_LazyModule, self).__init__(name)
-        self.__doc__ = self.__class__.__doc__
-
-    def __dir__(self):
-        attrs = ["__doc__", "__name__"]
-        attrs += [attr.name for attr in self._moved_attributes]
-        return attrs
-
-    # Subclasses should override this
-    _moved_attributes = []
-
-
-class MovedAttribute(_LazyDescr):
-    def __init__(self, name, old_mod, new_mod, old_attr=None, new_attr=None):
-        super(MovedAttribute, self).__init__(name)
-        if PY3:
-            if new_mod is None:
-                new_mod = name
-            self.mod = new_mod
-            if new_attr is None:
-                if old_attr is None:
-                    new_attr = name
-                else:
-                    new_attr = old_attr
-            self.attr = new_attr
-        else:
-            self.mod = old_mod
-            if old_attr is None:
-                old_attr = name
-            self.attr = old_attr
-
-    def _resolve(self):
-        module = _import_module(self.mod)
-        return getattr(module, self.attr)
-
-
-class _SixMetaPathImporter(object):
-
-    """
-    A meta path importer to import six.moves and its submodules.
-
-    This class implements a PEP302 finder and loader. It should be compatible
-    with Python 2.5 and all existing versions of Python3
-    """
-
-    def __init__(self, six_module_name):
-        self.name = six_module_name
-        self.known_modules = {}
-
-    def _add_module(self, mod, *fullnames):
-        for fullname in fullnames:
-            self.known_modules[self.name + "." + fullname] = mod
-
-    def _get_module(self, fullname):
-        return self.known_modules[self.name + "." + fullname]
-
-    def find_module(self, fullname, path=None):
-        if fullname in self.known_modules:
-            return self
-        return None
-
-    def __get_module(self, fullname):
-        try:
-            return self.known_modules[fullname]
-        except KeyError:
-            raise ImportError("This loader does not know module " + fullname)
-
-    def load_module(self, fullname):
-        try:
-            # in case of a reload
-            return sys.modules[fullname]
-        except KeyError:
-            pass
-        mod = self.__get_module(fullname)
-        if isinstance(mod, MovedModule):
-            mod = mod._resolve()
-        else:
-            mod.__loader__ = self
-        sys.modules[fullname] = mod
-        return mod
-
-    def is_package(self, fullname):
-        """
-        Return true, if the named module is a package.
-
-        We need this method to get correct spec objects with
-        Python 3.4 (see PEP451)
-        """
-        return hasattr(self.__get_module(fullname), "__path__")
-
-    def get_code(self, fullname):
-        """Return None
-
-        Required, if is_package is implemented"""
-        self.__get_module(fullname)  # eventually raises ImportError
-        return None
-
-    get_source = get_code  # same as get_code
-
-
-_importer = _SixMetaPathImporter(__name__)
-
-
-class _MovedItems(_LazyModule):
-
-    """Lazy loading of moved objects"""
-
-    __path__ = []  # mark as package
-
-
-_moved_attributes = [
-    MovedAttribute("cStringIO", "cStringIO", "io", "StringIO"),
-    MovedAttribute("filter", "itertools", "builtins", "ifilter", "filter"),
-    MovedAttribute(
-        "filterfalse", "itertools", "itertools", "ifilterfalse", "filterfalse"
-    ),
-    MovedAttribute("input", "__builtin__", "builtins", "raw_input", "input"),
-    MovedAttribute("intern", "__builtin__", "sys"),
-    MovedAttribute("map", "itertools", "builtins", "imap", "map"),
-    MovedAttribute("getcwd", "os", "os", "getcwdu", "getcwd"),
-    MovedAttribute("getcwdb", "os", "os", "getcwd", "getcwdb"),
-    MovedAttribute("getoutput", "commands", "subprocess"),
-    MovedAttribute("range", "__builtin__", "builtins", "xrange", "range"),
-    MovedAttribute(
-        "reload_module", "__builtin__", "importlib" if PY34 else "imp", "reload"
-    ),
-    MovedAttribute("reduce", "__builtin__", "functools"),
-    MovedAttribute("shlex_quote", "pipes", "shlex", "quote"),
-    MovedAttribute("StringIO", "StringIO", "io"),
-    MovedAttribute("UserDict", "UserDict", "collections"),
-    MovedAttribute("UserList", "UserList", "collections"),
-    MovedAttribute("UserString", "UserString", "collections"),
-    MovedAttribute("xrange", "__builtin__", "builtins", "xrange", "range"),
-    MovedAttribute("zip", "itertools", "builtins", "izip", "zip"),
-    MovedAttribute(
-        "zip_longest", "itertools", "itertools", "izip_longest", "zip_longest"
-    ),
-    MovedModule("builtins", "__builtin__"),
-    MovedModule("configparser", "ConfigParser"),
-    MovedModule("copyreg", "copy_reg"),
-    MovedModule("dbm_gnu", "gdbm", "dbm.gnu"),
-    MovedModule("_dummy_thread", "dummy_thread", "_dummy_thread"),
-    MovedModule("http_cookiejar", "cookielib", "http.cookiejar"),
-    MovedModule("http_cookies", "Cookie", "http.cookies"),
-    MovedModule("html_entities", "htmlentitydefs", "html.entities"),
-    MovedModule("html_parser", "HTMLParser", "html.parser"),
-    MovedModule("http_client", "httplib", "http.client"),
-    MovedModule("email_mime_base", "email.MIMEBase", "email.mime.base"),
-    MovedModule("email_mime_image", "email.MIMEImage", "email.mime.image"),
-    MovedModule("email_mime_multipart", "email.MIMEMultipart", "email.mime.multipart"),
-    MovedModule(
-        "email_mime_nonmultipart", "email.MIMENonMultipart", "email.mime.nonmultipart"
-    ),
-    MovedModule("email_mime_text", "email.MIMEText", "email.mime.text"),
-    MovedModule("BaseHTTPServer", "BaseHTTPServer", "http.server"),
-    MovedModule("CGIHTTPServer", "CGIHTTPServer", "http.server"),
-    MovedModule("SimpleHTTPServer", "SimpleHTTPServer", "http.server"),
-    MovedModule("cPickle", "cPickle", "pickle"),
-    MovedModule("queue", "Queue"),
-    MovedModule("reprlib", "repr"),
-    MovedModule("socketserver", "SocketServer"),
-    MovedModule("_thread", "thread", "_thread"),
-    MovedModule("tkinter", "Tkinter"),
-    MovedModule("tkinter_dialog", "Dialog", "tkinter.dialog"),
-    MovedModule("tkinter_filedialog", "FileDialog", "tkinter.filedialog"),
-    MovedModule("tkinter_scrolledtext", "ScrolledText", "tkinter.scrolledtext"),
-    MovedModule("tkinter_simpledialog", "SimpleDialog", "tkinter.simpledialog"),
-    MovedModule("tkinter_tix", "Tix", "tkinter.tix"),
-    MovedModule("tkinter_ttk", "ttk", "tkinter.ttk"),
-    MovedModule("tkinter_constants", "Tkconstants", "tkinter.constants"),
-    MovedModule("tkinter_dnd", "Tkdnd", "tkinter.dnd"),
-    MovedModule("tkinter_colorchooser", "tkColorChooser", "tkinter.colorchooser"),
-    MovedModule("tkinter_commondialog", "tkCommonDialog", "tkinter.commondialog"),
-    MovedModule("tkinter_tkfiledialog", "tkFileDialog", "tkinter.filedialog"),
-    MovedModule("tkinter_font", "tkFont", "tkinter.font"),
-    MovedModule("tkinter_messagebox", "tkMessageBox", "tkinter.messagebox"),
-    MovedModule("tkinter_tksimpledialog", "tkSimpleDialog", "tkinter.simpledialog"),
-    MovedModule("urllib_parse", __name__ + ".moves.urllib_parse", "urllib.parse"),
-    MovedModule("urllib_error", __name__ + ".moves.urllib_error", "urllib.error"),
-    MovedModule("urllib", __name__ + ".moves.urllib", __name__ + ".moves.urllib"),
-    MovedModule("urllib_robotparser", "robotparser", "urllib.robotparser"),
-    MovedModule("xmlrpc_client", "xmlrpclib", "xmlrpc.client"),
-    MovedModule("xmlrpc_server", "SimpleXMLRPCServer", "xmlrpc.server"),
-]
-# Add windows specific modules.
-if sys.platform == "win32":
-    _moved_attributes += [MovedModule("winreg", "_winreg")]
-
-for attr in _moved_attributes:
-    setattr(_MovedItems, attr.name, attr)
-    if isinstance(attr, MovedModule):
-        _importer._add_module(attr, "moves." + attr.name)
-del attr
-
-_MovedItems._moved_attributes = _moved_attributes
-
-moves = _MovedItems(__name__ + ".moves")
-_importer._add_module(moves, "moves")
-
-
-class Module_six_moves_urllib_parse(_LazyModule):
-
-    """Lazy loading of moved objects in six.moves.urllib_parse"""
-
-
-_urllib_parse_moved_attributes = [
-    MovedAttribute("ParseResult", "urlparse", "urllib.parse"),
-    MovedAttribute("SplitResult", "urlparse", "urllib.parse"),
-    MovedAttribute("parse_qs", "urlparse", "urllib.parse"),
-    MovedAttribute("parse_qsl", "urlparse", "urllib.parse"),
-    MovedAttribute("urldefrag", "urlparse", "urllib.parse"),
-    MovedAttribute("urljoin", "urlparse", "urllib.parse"),
-    MovedAttribute("urlparse", "urlparse", "urllib.parse"),
-    MovedAttribute("urlsplit", "urlparse", "urllib.parse"),
-    MovedAttribute("urlunparse", "urlparse", "urllib.parse"),
-    MovedAttribute("urlunsplit", "urlparse", "urllib.parse"),
-    MovedAttribute("quote", "urllib", "urllib.parse"),
-    MovedAttribute("quote_plus", "urllib", "urllib.parse"),
-    MovedAttribute("unquote", "urllib", "urllib.parse"),
-    MovedAttribute("unquote_plus", "urllib", "urllib.parse"),
-    MovedAttribute(
-        "unquote_to_bytes", "urllib", "urllib.parse", "unquote", "unquote_to_bytes"
-    ),
-    MovedAttribute("urlencode", "urllib", "urllib.parse"),
-    MovedAttribute("splitquery", "urllib", "urllib.parse"),
-    MovedAttribute("splittag", "urllib", "urllib.parse"),
-    MovedAttribute("splituser", "urllib", "urllib.parse"),
-    MovedAttribute("splitvalue", "urllib", "urllib.parse"),
-    MovedAttribute("uses_fragment", "urlparse", "urllib.parse"),
-    MovedAttribute("uses_netloc", "urlparse", "urllib.parse"),
-    MovedAttribute("uses_params", "urlparse", "urllib.parse"),
-    MovedAttribute("uses_query", "urlparse", "urllib.parse"),
-    MovedAttribute("uses_relative", "urlparse", "urllib.parse"),
-]
-for attr in _urllib_parse_moved_attributes:
-    setattr(Module_six_moves_urllib_parse, attr.name, attr)
-del attr
-
-Module_six_moves_urllib_parse._moved_attributes = _urllib_parse_moved_attributes
-
-_importer._add_module(
-    Module_six_moves_urllib_parse(__name__ + ".moves.urllib_parse"),
-    "moves.urllib_parse",
-    "moves.urllib.parse",
-)
-
-
-class Module_six_moves_urllib_error(_LazyModule):
-
-    """Lazy loading of moved objects in six.moves.urllib_error"""
-
-
-_urllib_error_moved_attributes = [
-    MovedAttribute("URLError", "urllib2", "urllib.error"),
-    MovedAttribute("HTTPError", "urllib2", "urllib.error"),
-    MovedAttribute("ContentTooShortError", "urllib", "urllib.error"),
-]
-for attr in _urllib_error_moved_attributes:
-    setattr(Module_six_moves_urllib_error, attr.name, attr)
-del attr
-
-Module_six_moves_urllib_error._moved_attributes = _urllib_error_moved_attributes
-
-_importer._add_module(
-    Module_six_moves_urllib_error(__name__ + ".moves.urllib.error"),
-    "moves.urllib_error",
-    "moves.urllib.error",
-)
-
-
-class Module_six_moves_urllib_request(_LazyModule):
-
-    """Lazy loading of moved objects in six.moves.urllib_request"""
-
-
-_urllib_request_moved_attributes = [
-    MovedAttribute("urlopen", "urllib2", "urllib.request"),
-    MovedAttribute("install_opener", "urllib2", "urllib.request"),
-    MovedAttribute("build_opener", "urllib2", "urllib.request"),
-    MovedAttribute("pathname2url", "urllib", "urllib.request"),
-    MovedAttribute("url2pathname", "urllib", "urllib.request"),
-    MovedAttribute("getproxies", "urllib", "urllib.request"),
-    MovedAttribute("Request", "urllib2", "urllib.request"),
-    MovedAttribute("OpenerDirector", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPDefaultErrorHandler", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPRedirectHandler", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPCookieProcessor", "urllib2", "urllib.request"),
-    MovedAttribute("ProxyHandler", "urllib2", "urllib.request"),
-    MovedAttribute("BaseHandler", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPPasswordMgr", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPPasswordMgrWithDefaultRealm", "urllib2", "urllib.request"),
-    MovedAttribute("AbstractBasicAuthHandler", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPBasicAuthHandler", "urllib2", "urllib.request"),
-    MovedAttribute("ProxyBasicAuthHandler", "urllib2", "urllib.request"),
-    MovedAttribute("AbstractDigestAuthHandler", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPDigestAuthHandler", "urllib2", "urllib.request"),
-    MovedAttribute("ProxyDigestAuthHandler", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPHandler", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPSHandler", "urllib2", "urllib.request"),
-    MovedAttribute("FileHandler", "urllib2", "urllib.request"),
-    MovedAttribute("FTPHandler", "urllib2", "urllib.request"),
-    MovedAttribute("CacheFTPHandler", "urllib2", "urllib.request"),
-    MovedAttribute("UnknownHandler", "urllib2", "urllib.request"),
-    MovedAttribute("HTTPErrorProcessor", "urllib2", "urllib.request"),
-    MovedAttribute("urlretrieve", "urllib", "urllib.request"),
-    MovedAttribute("urlcleanup", "urllib", "urllib.request"),
-    MovedAttribute("URLopener", "urllib", "urllib.request"),
-    MovedAttribute("FancyURLopener", "urllib", "urllib.request"),
-    MovedAttribute("proxy_bypass", "urllib", "urllib.request"),
-    MovedAttribute("parse_http_list", "urllib2", "urllib.request"),
-    MovedAttribute("parse_keqv_list", "urllib2", "urllib.request"),
-]
-for attr in _urllib_request_moved_attributes:
-    setattr(Module_six_moves_urllib_request, attr.name, attr)
-del attr
-
-Module_six_moves_urllib_request._moved_attributes = _urllib_request_moved_attributes
-
-_importer._add_module(
-    Module_six_moves_urllib_request(__name__ + ".moves.urllib.request"),
-    "moves.urllib_request",
-    "moves.urllib.request",
-)
-
-
-class Module_six_moves_urllib_response(_LazyModule):
-
-    """Lazy loading of moved objects in six.moves.urllib_response"""
-
-
-_urllib_response_moved_attributes = [
-    MovedAttribute("addbase", "urllib", "urllib.response"),
-    MovedAttribute("addclosehook", "urllib", "urllib.response"),
-    MovedAttribute("addinfo", "urllib", "urllib.response"),
-    MovedAttribute("addinfourl", "urllib", "urllib.response"),
-]
-for attr in _urllib_response_moved_attributes:
-    setattr(Module_six_moves_urllib_response, attr.name, attr)
-del attr
-
-Module_six_moves_urllib_response._moved_attributes = _urllib_response_moved_attributes
-
-_importer._add_module(
-    Module_six_moves_urllib_response(__name__ + ".moves.urllib.response"),
-    "moves.urllib_response",
-    "moves.urllib.response",
-)
-
-
-class Module_six_moves_urllib_robotparser(_LazyModule):
-
-    """Lazy loading of moved objects in six.moves.urllib_robotparser"""
-
-
-_urllib_robotparser_moved_attributes = [
-    MovedAttribute("RobotFileParser", "robotparser", "urllib.robotparser")
-]
-for attr in _urllib_robotparser_moved_attributes:
-    setattr(Module_six_moves_urllib_robotparser, attr.name, attr)
-del attr
-
-Module_six_moves_urllib_robotparser._moved_attributes = (
-    _urllib_robotparser_moved_attributes
-)
-
-_importer._add_module(
-    Module_six_moves_urllib_robotparser(__name__ + ".moves.urllib.robotparser"),
-    "moves.urllib_robotparser",
-    "moves.urllib.robotparser",
-)
-
-
-class Module_six_moves_urllib(types.ModuleType):
-
-    """Create a six.moves.urllib namespace that resembles the Python 3 namespace"""
-
-    __path__ = []  # mark as package
-    parse = _importer._get_module("moves.urllib_parse")
-    error = _importer._get_module("moves.urllib_error")
-    request = _importer._get_module("moves.urllib_request")
-    response = _importer._get_module("moves.urllib_response")
-    robotparser = _importer._get_module("moves.urllib_robotparser")
-
-    def __dir__(self):
-        return ["parse", "error", "request", "response", "robotparser"]
-
-
-_importer._add_module(
-    Module_six_moves_urllib(__name__ + ".moves.urllib"), "moves.urllib"
-)
-
-
-def add_move(move):
-    """Add an item to six.moves."""
-    setattr(_MovedItems, move.name, move)
-
-
-def remove_move(name):
-    """Remove item from six.moves."""
-    try:
-        delattr(_MovedItems, name)
-    except AttributeError:
-        try:
-            del moves.__dict__[name]
-        except KeyError:
-            raise AttributeError("no such move, %r" % (name,))
-
-
-if PY3:
-    _meth_func = "__func__"
-    _meth_self = "__self__"
-
-    _func_closure = "__closure__"
-    _func_code = "__code__"
-    _func_defaults = "__defaults__"
-    _func_globals = "__globals__"
-else:
-    _meth_func = "im_func"
-    _meth_self = "im_self"
-
-    _func_closure = "func_closure"
-    _func_code = "func_code"
-    _func_defaults = "func_defaults"
-    _func_globals = "func_globals"
-
-
-try:
-    advance_iterator = next
-except NameError:
-
-    def advance_iterator(it):
-        return it.next()
-
-
-next = advance_iterator
-
-
-try:
-    callable = callable
-except NameError:
-
-    def callable(obj):
-        return any("__call__" in klass.__dict__ for klass in type(obj).__mro__)
-
-
-if PY3:
-
-    def get_unbound_function(unbound):
-        return unbound
-
-    create_bound_method = types.MethodType
-
-    def create_unbound_method(func, cls):
-        return func
-
-    Iterator = object
-else:
-
-    def get_unbound_function(unbound):
-        return unbound.im_func
-
-    def create_bound_method(func, obj):
-        return types.MethodType(func, obj, obj.__class__)
-
-    def create_unbound_method(func, cls):
-        return types.MethodType(func, None, cls)
-
-    class Iterator(object):
-        def next(self):
-            return type(self).__next__(self)
-
-    callable = callable
-_add_doc(
-    get_unbound_function, """Get the function out of a possibly unbound function"""
-)
-
-
-get_method_function = operator.attrgetter(_meth_func)
-get_method_self = operator.attrgetter(_meth_self)
-get_function_closure = operator.attrgetter(_func_closure)
-get_function_code = operator.attrgetter(_func_code)
-get_function_defaults = operator.attrgetter(_func_defaults)
-get_function_globals = operator.attrgetter(_func_globals)
-
-
-if PY3:
-
-    def iterkeys(d, **kw):
-        return iter(d.keys(**kw))
-
-    def itervalues(d, **kw):
-        return iter(d.values(**kw))
-
-    def iteritems(d, **kw):
-        return iter(d.items(**kw))
-
-    def iterlists(d, **kw):
-        return iter(d.lists(**kw))
-
-    viewkeys = operator.methodcaller("keys")
-
-    viewvalues = operator.methodcaller("values")
-
-    viewitems = operator.methodcaller("items")
-else:
-
-    def iterkeys(d, **kw):
-        return d.iterkeys(**kw)
-
-    def itervalues(d, **kw):
-        return d.itervalues(**kw)
-
-    def iteritems(d, **kw):
-        return d.iteritems(**kw)
-
-    def iterlists(d, **kw):
-        return d.iterlists(**kw)
-
-    viewkeys = operator.methodcaller("viewkeys")
-
-    viewvalues = operator.methodcaller("viewvalues")
-
-    viewitems = operator.methodcaller("viewitems")
-
-_add_doc(iterkeys, "Return an iterator over the keys of a dictionary.")
-_add_doc(itervalues, "Return an iterator over the values of a dictionary.")
-_add_doc(iteritems, "Return an iterator over the (key, value) pairs of a dictionary.")
-_add_doc(
-    iterlists, "Return an iterator over the (key, [values]) pairs of a dictionary."
-)
-
-
-if PY3:
-
-    def b(s):
-        return s.encode("latin-1")
-
-    def u(s):
-        return s
-
-    unichr = chr
-    import struct
-
-    int2byte = struct.Struct(">B").pack
-    del struct
-    byte2int = operator.itemgetter(0)
-    indexbytes = operator.getitem
-    iterbytes = iter
-    import io
-
-    StringIO = io.StringIO
-    BytesIO = io.BytesIO
-    del io
-    _assertCountEqual = "assertCountEqual"
-    if sys.version_info[1] <= 1:
-        _assertRaisesRegex = "assertRaisesRegexp"
-        _assertRegex = "assertRegexpMatches"
-    else:
-        _assertRaisesRegex = "assertRaisesRegex"
-        _assertRegex = "assertRegex"
-else:
-
-    def b(s):
-        return s
-
-    # Workaround for standalone backslash
-
-    def u(s):
-        return unicode(s.replace(r"\\", r"\\\\"), "unicode_escape")
-
-    unichr = unichr
-    int2byte = chr
-
-    def byte2int(bs):
-        return ord(bs[0])
-
-    def indexbytes(buf, i):
-        return ord(buf[i])
-
-    iterbytes = functools.partial(itertools.imap, ord)
-    import StringIO
-
-    StringIO = BytesIO = StringIO.StringIO
-    _assertCountEqual = "assertItemsEqual"
-    _assertRaisesRegex = "assertRaisesRegexp"
-    _assertRegex = "assertRegexpMatches"
-_add_doc(b, """Byte literal""")
-_add_doc(u, """Text literal""")
-
-
-def assertCountEqual(self, *args, **kwargs):
-    return getattr(self, _assertCountEqual)(*args, **kwargs)
-
-
-def assertRaisesRegex(self, *args, **kwargs):
-    return getattr(self, _assertRaisesRegex)(*args, **kwargs)
-
-
-def assertRegex(self, *args, **kwargs):
-    return getattr(self, _assertRegex)(*args, **kwargs)
-
-
-if PY3:
-    exec_ = getattr(moves.builtins, "exec")
-
-    def reraise(tp, value, tb=None):
-        try:
-            if value is None:
-                value = tp()
-            if value.__traceback__ is not tb:
-                raise value.with_traceback(tb)
-            raise value
-        finally:
-            value = None
-            tb = None
-
-
-else:
-
-    def exec_(_code_, _globs_=None, _locs_=None):
-        """Execute code in a namespace."""
-        if _globs_ is None:
-            frame = sys._getframe(1)
-            _globs_ = frame.f_globals
-            if _locs_ is None:
-                _locs_ = frame.f_locals
-            del frame
-        elif _locs_ is None:
-            _locs_ = _globs_
-        exec("""exec _code_ in _globs_, _locs_""")
-
-    exec_(
-        """def reraise(tp, value, tb=None):
-    try:
-        raise tp, value, tb
-    finally:
-        tb = None
-"""
-    )
-
-
-if sys.version_info[:2] == (3, 2):
-    exec_(
-        """def raise_from(value, from_value):
-    try:
-        if from_value is None:
-            raise value
-        raise value from from_value
-    finally:
-        value = None
-"""
-    )
-elif sys.version_info[:2] > (3, 2):
-    exec_(
-        """def raise_from(value, from_value):
-    try:
-        raise value from from_value
-    finally:
-        value = None
-"""
-    )
-else:
-
-    def raise_from(value, from_value):
-        raise value
-
-
-print_ = getattr(moves.builtins, "print", None)
-if print_ is None:
-
-    def print_(*args, **kwargs):
-        """The new-style print function for Python 2.4 and 2.5."""
-        fp = kwargs.pop("file", sys.stdout)
-        if fp is None:
-            return
-
-        def write(data):
-            if not isinstance(data, basestring):
-                data = str(data)
-            # If the file has an encoding, encode unicode with it.
-            if (
-                isinstance(fp, file)
-                and isinstance(data, unicode)
-                and fp.encoding is not None
-            ):
-                errors = getattr(fp, "errors", None)
-                if errors is None:
-                    errors = "strict"
-                data = data.encode(fp.encoding, errors)
-            fp.write(data)
-
-        want_unicode = False
-        sep = kwargs.pop("sep", None)
-        if sep is not None:
-            if isinstance(sep, unicode):
-                want_unicode = True
-            elif not isinstance(sep, str):
-                raise TypeError("sep must be None or a string")
-        end = kwargs.pop("end", None)
-        if end is not None:
-            if isinstance(end, unicode):
-                want_unicode = True
-            elif not isinstance(end, str):
-                raise TypeError("end must be None or a string")
-        if kwargs:
-            raise TypeError("invalid keyword arguments to print()")
-        if not want_unicode:
-            for arg in args:
-                if isinstance(arg, unicode):
-                    want_unicode = True
-                    break
-        if want_unicode:
-            newline = unicode("\n")
-            space = unicode(" ")
-        else:
-            newline = "\n"
-            space = " "
-        if sep is None:
-            sep = space
-        if end is None:
-            end = newline
-        for i, arg in enumerate(args):
-            if i:
-                write(sep)
-            write(arg)
-        write(end)
-
-
-if sys.version_info[:2] < (3, 3):
-    _print = print_
-
-    def print_(*args, **kwargs):
-        fp = kwargs.get("file", sys.stdout)
-        flush = kwargs.pop("flush", False)
-        _print(*args, **kwargs)
-        if flush and fp is not None:
-            fp.flush()
-
-
-_add_doc(reraise, """Reraise an exception.""")
-
-if sys.version_info[0:2] < (3, 4):
-
-    def wraps(
-        wrapped,
-        assigned=functools.WRAPPER_ASSIGNMENTS,
-        updated=functools.WRAPPER_UPDATES,
-    ):
-        def wrapper(f):
-            f = functools.wraps(wrapped, assigned, updated)(f)
-            f.__wrapped__ = wrapped
-            return f
-
-        return wrapper
-
-
-else:
-    wraps = functools.wraps
-
-
-def with_metaclass(meta, *bases):
-    """Create a base class with a metaclass."""
-    # This requires a bit of explanation: the basic idea is to make a dummy
-    # metaclass for one level of class instantiation that replaces itself with
-    # the actual metaclass.
-    class metaclass(type):
-        def __new__(cls, name, this_bases, d):
-            return meta(name, bases, d)
-
-        @classmethod
-        def __prepare__(cls, name, this_bases):
-            return meta.__prepare__(name, bases)
-
-    return type.__new__(metaclass, "temporary_class", (), {})
-
-
-def add_metaclass(metaclass):
-    """Class decorator for creating a class with a metaclass."""
-
-    def wrapper(cls):
-        orig_vars = cls.__dict__.copy()
-        slots = orig_vars.get("__slots__")
-        if slots is not None:
-            if isinstance(slots, str):
-                slots = [slots]
-            for slots_var in slots:
-                orig_vars.pop(slots_var)
-        orig_vars.pop("__dict__", None)
-        orig_vars.pop("__weakref__", None)
-        if hasattr(cls, "__qualname__"):
-            orig_vars["__qualname__"] = cls.__qualname__
-        return metaclass(cls.__name__, cls.__bases__, orig_vars)
-
-    return wrapper
-
-
-def ensure_binary(s, encoding="utf-8", errors="strict"):
-    """Coerce **s** to six.binary_type.
-
-    For Python 2:
-      - `unicode` -> encoded to `str`
-      - `str` -> `str`
-
-    For Python 3:
-      - `str` -> encoded to `bytes`
-      - `bytes` -> `bytes`
-    """
-    if isinstance(s, text_type):
-        return s.encode(encoding, errors)
-    elif isinstance(s, binary_type):
-        return s
-    else:
-        raise TypeError("not expecting type '%s'" % type(s))
-
-
-def ensure_str(s, encoding="utf-8", errors="strict"):
-    """Coerce *s* to `str`.
-
-    For Python 2:
-      - `unicode` -> encoded to `str`
-      - `str` -> `str`
-
-    For Python 3:
-      - `str` -> `str`
-      - `bytes` -> decoded to `str`
-    """
-    if not isinstance(s, (text_type, binary_type)):
-        raise TypeError("not expecting type '%s'" % type(s))
-    if PY2 and isinstance(s, text_type):
-        s = s.encode(encoding, errors)
-    elif PY3 and isinstance(s, binary_type):
-        s = s.decode(encoding, errors)
-    return s
-
-
-def ensure_text(s, encoding="utf-8", errors="strict"):
-    """Coerce *s* to six.text_type.
-
-    For Python 2:
-      - `unicode` -> `unicode`
-      - `str` -> `unicode`
-
-    For Python 3:
-      - `str` -> `str`
-      - `bytes` -> decoded to `str`
-    """
-    if isinstance(s, binary_type):
-        return s.decode(encoding, errors)
-    elif isinstance(s, text_type):
-        return s
-    else:
-        raise TypeError("not expecting type '%s'" % type(s))
-
-
-def python_2_unicode_compatible(klass):
-    """
-    A decorator that defines __unicode__ and __str__ methods under Python 2.
-    Under Python 3 it does nothing.
-
-    To support Python 2 and 3 with a single code base, define a __str__ method
-    returning text and apply this decorator to the class.
-    """
-    if PY2:
-        if "__str__" not in klass.__dict__:
-            raise ValueError(
-                "@python_2_unicode_compatible cannot be applied "
-                "to %s because it doesn't define __str__()." % klass.__name__
-            )
-        klass.__unicode__ = klass.__str__
-        klass.__str__ = lambda self: self.__unicode__().encode("utf-8")
-    return klass
-
-
-# Complete the moves implementation.
-# This code is at the end of this module to speed up module loading.
-# Turn this module into a package.
-__path__ = []  # required for PEP 302 and PEP 451
-__package__ = __name__  # see PEP 366 @ReservedAssignment
-if globals().get("__spec__") is not None:
-    __spec__.submodule_search_locations = []  # PEP 451 @UndefinedVariable
-# Remove other six meta path importers, since they cause problems. This can
-# happen if six is removed from sys.modules and then reloaded. (Setuptools does
-# this for some reason.)
-if sys.meta_path:
-    for i, importer in enumerate(sys.meta_path):
-        # Here's some real nastiness: Another "instance" of the six module might
-        # be floating around. Therefore, we can't use isinstance() to check for
-        # the six meta path importer, since the other six instance will have
-        # inserted an importer with different class.
-        if (
-            type(importer).__name__ == "_SixMetaPathImporter"
-            and importer.name == __name__
-        ):
-            del sys.meta_path[i]
-            break
-    del i, importer
-# Finally, add the importer to the meta path import hook.
-sys.meta_path.append(_importer)
diff --git a/venv/lib/python3.7/site-packages/urllib3/packages/ssl_match_hostname/__init__.py b/venv/lib/python3.7/site-packages/urllib3/packages/ssl_match_hostname/__init__.py
deleted file mode 100644
index 75b6bb1..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/packages/ssl_match_hostname/__init__.py
+++ /dev/null
@@ -1,19 +0,0 @@
-import sys
-
-try:
-    # Our match_hostname function is the same as 3.5's, so we only want to
-    # import the match_hostname function if it's at least that good.
-    if sys.version_info < (3, 5):
-        raise ImportError("Fallback to vendored code")
-
-    from ssl import CertificateError, match_hostname
-except ImportError:
-    try:
-        # Backport of the function from a pypi module
-        from backports.ssl_match_hostname import CertificateError, match_hostname
-    except ImportError:
-        # Our vendored copy
-        from ._implementation import CertificateError, match_hostname
-
-# Not needed, but documenting what we provide.
-__all__ = ("CertificateError", "match_hostname")
diff --git a/venv/lib/python3.7/site-packages/urllib3/packages/ssl_match_hostname/_implementation.py b/venv/lib/python3.7/site-packages/urllib3/packages/ssl_match_hostname/_implementation.py
deleted file mode 100644
index 689208d..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/packages/ssl_match_hostname/_implementation.py
+++ /dev/null
@@ -1,160 +0,0 @@
-"""The match_hostname() function from Python 3.3.3, essential when using SSL."""
-
-# Note: This file is under the PSF license as the code comes from the python
-# stdlib.   http://docs.python.org/3/license.html
-
-import re
-import sys
-
-# ipaddress has been backported to 2.6+ in pypi.  If it is installed on the
-# system, use it to handle IPAddress ServerAltnames (this was added in
-# python-3.5) otherwise only do DNS matching.  This allows
-# backports.ssl_match_hostname to continue to be used in Python 2.7.
-try:
-    import ipaddress
-except ImportError:
-    ipaddress = None
-
-__version__ = "3.5.0.1"
-
-
-class CertificateError(ValueError):
-    pass
-
-
-def _dnsname_match(dn, hostname, max_wildcards=1):
-    """Matching according to RFC 6125, section 6.4.3
-
-    http://tools.ietf.org/html/rfc6125#section-6.4.3
-    """
-    pats = []
-    if not dn:
-        return False
-
-    # Ported from python3-syntax:
-    # leftmost, *remainder = dn.split(r'.')
-    parts = dn.split(r".")
-    leftmost = parts[0]
-    remainder = parts[1:]
-
-    wildcards = leftmost.count("*")
-    if wildcards > max_wildcards:
-        # Issue #17980: avoid denials of service by refusing more
-        # than one wildcard per fragment.  A survey of established
-        # policy among SSL implementations showed it to be a
-        # reasonable choice.
-        raise CertificateError(
-            "too many wildcards in certificate DNS name: " + repr(dn)
-        )
-
-    # speed up common case w/o wildcards
-    if not wildcards:
-        return dn.lower() == hostname.lower()
-
-    # RFC 6125, section 6.4.3, subitem 1.
-    # The client SHOULD NOT attempt to match a presented identifier in which
-    # the wildcard character comprises a label other than the left-most label.
-    if leftmost == "*":
-        # When '*' is a fragment by itself, it matches a non-empty dotless
-        # fragment.
-        pats.append("[^.]+")
-    elif leftmost.startswith("xn--") or hostname.startswith("xn--"):
-        # RFC 6125, section 6.4.3, subitem 3.
-        # The client SHOULD NOT attempt to match a presented identifier
-        # where the wildcard character is embedded within an A-label or
-        # U-label of an internationalized domain name.
-        pats.append(re.escape(leftmost))
-    else:
-        # Otherwise, '*' matches any dotless string, e.g. www*
-        pats.append(re.escape(leftmost).replace(r"\*", "[^.]*"))
-
-    # add the remaining fragments, ignore any wildcards
-    for frag in remainder:
-        pats.append(re.escape(frag))
-
-    pat = re.compile(r"\A" + r"\.".join(pats) + r"\Z", re.IGNORECASE)
-    return pat.match(hostname)
-
-
-def _to_unicode(obj):
-    if isinstance(obj, str) and sys.version_info < (3,):
-        obj = unicode(obj, encoding="ascii", errors="strict")
-    return obj
-
-
-def _ipaddress_match(ipname, host_ip):
-    """Exact matching of IP addresses.
-
-    RFC 6125 explicitly doesn't define an algorithm for this
-    (section 1.7.2 - "Out of Scope").
-    """
-    # OpenSSL may add a trailing newline to a subjectAltName's IP address
-    # Divergence from upstream: ipaddress can't handle byte str
-    ip = ipaddress.ip_address(_to_unicode(ipname).rstrip())
-    return ip == host_ip
-
-
-def match_hostname(cert, hostname):
-    """Verify that *cert* (in decoded format as returned by
-    SSLSocket.getpeercert()) matches the *hostname*.  RFC 2818 and RFC 6125
-    rules are followed, but IP addresses are not accepted for *hostname*.
-
-    CertificateError is raised on failure. On success, the function
-    returns nothing.
-    """
-    if not cert:
-        raise ValueError(
-            "empty or no certificate, match_hostname needs a "
-            "SSL socket or SSL context with either "
-            "CERT_OPTIONAL or CERT_REQUIRED"
-        )
-    try:
-        # Divergence from upstream: ipaddress can't handle byte str
-        host_ip = ipaddress.ip_address(_to_unicode(hostname))
-    except ValueError:
-        # Not an IP address (common case)
-        host_ip = None
-    except UnicodeError:
-        # Divergence from upstream: Have to deal with ipaddress not taking
-        # byte strings.  addresses should be all ascii, so we consider it not
-        # an ipaddress in this case
-        host_ip = None
-    except AttributeError:
-        # Divergence from upstream: Make ipaddress library optional
-        if ipaddress is None:
-            host_ip = None
-        else:
-            raise
-    dnsnames = []
-    san = cert.get("subjectAltName", ())
-    for key, value in san:
-        if key == "DNS":
-            if host_ip is None and _dnsname_match(value, hostname):
-                return
-            dnsnames.append(value)
-        elif key == "IP Address":
-            if host_ip is not None and _ipaddress_match(value, host_ip):
-                return
-            dnsnames.append(value)
-    if not dnsnames:
-        # The subject is only checked when there is no dNSName entry
-        # in subjectAltName
-        for sub in cert.get("subject", ()):
-            for key, value in sub:
-                # XXX according to RFC 2818, the most specific Common Name
-                # must be used.
-                if key == "commonName":
-                    if _dnsname_match(value, hostname):
-                        return
-                    dnsnames.append(value)
-    if len(dnsnames) > 1:
-        raise CertificateError(
-            "hostname %r "
-            "doesn't match either of %s" % (hostname, ", ".join(map(repr, dnsnames)))
-        )
-    elif len(dnsnames) == 1:
-        raise CertificateError("hostname %r doesn't match %r" % (hostname, dnsnames[0]))
-    else:
-        raise CertificateError(
-            "no appropriate commonName or subjectAltName fields were found"
-        )
diff --git a/venv/lib/python3.7/site-packages/urllib3/poolmanager.py b/venv/lib/python3.7/site-packages/urllib3/poolmanager.py
deleted file mode 100644
index 242a2f8..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/poolmanager.py
+++ /dev/null
@@ -1,470 +0,0 @@
-from __future__ import absolute_import
-import collections
-import functools
-import logging
-
-from ._collections import RecentlyUsedContainer
-from .connectionpool import HTTPConnectionPool, HTTPSConnectionPool
-from .connectionpool import port_by_scheme
-from .exceptions import LocationValueError, MaxRetryError, ProxySchemeUnknown
-from .packages import six
-from .packages.six.moves.urllib.parse import urljoin
-from .request import RequestMethods
-from .util.url import parse_url
-from .util.retry import Retry
-
-
-__all__ = ["PoolManager", "ProxyManager", "proxy_from_url"]
-
-
-log = logging.getLogger(__name__)
-
-SSL_KEYWORDS = (
-    "key_file",
-    "cert_file",
-    "cert_reqs",
-    "ca_certs",
-    "ssl_version",
-    "ca_cert_dir",
-    "ssl_context",
-    "key_password",
-)
-
-# All known keyword arguments that could be provided to the pool manager, its
-# pools, or the underlying connections. This is used to construct a pool key.
-_key_fields = (
-    "key_scheme",  # str
-    "key_host",  # str
-    "key_port",  # int
-    "key_timeout",  # int or float or Timeout
-    "key_retries",  # int or Retry
-    "key_strict",  # bool
-    "key_block",  # bool
-    "key_source_address",  # str
-    "key_key_file",  # str
-    "key_key_password",  # str
-    "key_cert_file",  # str
-    "key_cert_reqs",  # str
-    "key_ca_certs",  # str
-    "key_ssl_version",  # str
-    "key_ca_cert_dir",  # str
-    "key_ssl_context",  # instance of ssl.SSLContext or urllib3.util.ssl_.SSLContext
-    "key_maxsize",  # int
-    "key_headers",  # dict
-    "key__proxy",  # parsed proxy url
-    "key__proxy_headers",  # dict
-    "key_socket_options",  # list of (level (int), optname (int), value (int or str)) tuples
-    "key__socks_options",  # dict
-    "key_assert_hostname",  # bool or string
-    "key_assert_fingerprint",  # str
-    "key_server_hostname",  # str
-)
-
-#: The namedtuple class used to construct keys for the connection pool.
-#: All custom key schemes should include the fields in this key at a minimum.
-PoolKey = collections.namedtuple("PoolKey", _key_fields)
-
-
-def _default_key_normalizer(key_class, request_context):
-    """
-    Create a pool key out of a request context dictionary.
-
-    According to RFC 3986, both the scheme and host are case-insensitive.
-    Therefore, this function normalizes both before constructing the pool
-    key for an HTTPS request. If you wish to change this behaviour, provide
-    alternate callables to ``key_fn_by_scheme``.
-
-    :param key_class:
-        The class to use when constructing the key. This should be a namedtuple
-        with the ``scheme`` and ``host`` keys at a minimum.
-    :type  key_class: namedtuple
-    :param request_context:
-        A dictionary-like object that contain the context for a request.
-    :type  request_context: dict
-
-    :return: A namedtuple that can be used as a connection pool key.
-    :rtype:  PoolKey
-    """
-    # Since we mutate the dictionary, make a copy first
-    context = request_context.copy()
-    context["scheme"] = context["scheme"].lower()
-    context["host"] = context["host"].lower()
-
-    # These are both dictionaries and need to be transformed into frozensets
-    for key in ("headers", "_proxy_headers", "_socks_options"):
-        if key in context and context[key] is not None:
-            context[key] = frozenset(context[key].items())
-
-    # The socket_options key may be a list and needs to be transformed into a
-    # tuple.
-    socket_opts = context.get("socket_options")
-    if socket_opts is not None:
-        context["socket_options"] = tuple(socket_opts)
-
-    # Map the kwargs to the names in the namedtuple - this is necessary since
-    # namedtuples can't have fields starting with '_'.
-    for key in list(context.keys()):
-        context["key_" + key] = context.pop(key)
-
-    # Default to ``None`` for keys missing from the context
-    for field in key_class._fields:
-        if field not in context:
-            context[field] = None
-
-    return key_class(**context)
-
-
-#: A dictionary that maps a scheme to a callable that creates a pool key.
-#: This can be used to alter the way pool keys are constructed, if desired.
-#: Each PoolManager makes a copy of this dictionary so they can be configured
-#: globally here, or individually on the instance.
-key_fn_by_scheme = {
-    "http": functools.partial(_default_key_normalizer, PoolKey),
-    "https": functools.partial(_default_key_normalizer, PoolKey),
-}
-
-pool_classes_by_scheme = {"http": HTTPConnectionPool, "https": HTTPSConnectionPool}
-
-
-class PoolManager(RequestMethods):
-    """
-    Allows for arbitrary requests while transparently keeping track of
-    necessary connection pools for you.
-
-    :param num_pools:
-        Number of connection pools to cache before discarding the least
-        recently used pool.
-
-    :param headers:
-        Headers to include with all requests, unless other headers are given
-        explicitly.
-
-    :param \\**connection_pool_kw:
-        Additional parameters are used to create fresh
-        :class:`urllib3.connectionpool.ConnectionPool` instances.
-
-    Example::
-
-        >>> manager = PoolManager(num_pools=2)
-        >>> r = manager.request('GET', 'http://google.com/')
-        >>> r = manager.request('GET', 'http://google.com/mail')
-        >>> r = manager.request('GET', 'http://yahoo.com/')
-        >>> len(manager.pools)
-        2
-
-    """
-
-    proxy = None
-
-    def __init__(self, num_pools=10, headers=None, **connection_pool_kw):
-        RequestMethods.__init__(self, headers)
-        self.connection_pool_kw = connection_pool_kw
-        self.pools = RecentlyUsedContainer(num_pools, dispose_func=lambda p: p.close())
-
-        # Locally set the pool classes and keys so other PoolManagers can
-        # override them.
-        self.pool_classes_by_scheme = pool_classes_by_scheme
-        self.key_fn_by_scheme = key_fn_by_scheme.copy()
-
-    def __enter__(self):
-        return self
-
-    def __exit__(self, exc_type, exc_val, exc_tb):
-        self.clear()
-        # Return False to re-raise any potential exceptions
-        return False
-
-    def _new_pool(self, scheme, host, port, request_context=None):
-        """
-        Create a new :class:`ConnectionPool` based on host, port, scheme, and
-        any additional pool keyword arguments.
-
-        If ``request_context`` is provided, it is provided as keyword arguments
-        to the pool class used. This method is used to actually create the
-        connection pools handed out by :meth:`connection_from_url` and
-        companion methods. It is intended to be overridden for customization.
-        """
-        pool_cls = self.pool_classes_by_scheme[scheme]
-        if request_context is None:
-            request_context = self.connection_pool_kw.copy()
-
-        # Although the context has everything necessary to create the pool,
-        # this function has historically only used the scheme, host, and port
-        # in the positional args. When an API change is acceptable these can
-        # be removed.
-        for key in ("scheme", "host", "port"):
-            request_context.pop(key, None)
-
-        if scheme == "http":
-            for kw in SSL_KEYWORDS:
-                request_context.pop(kw, None)
-
-        return pool_cls(host, port, **request_context)
-
-    def clear(self):
-        """
-        Empty our store of pools and direct them all to close.
-
-        This will not affect in-flight connections, but they will not be
-        re-used after completion.
-        """
-        self.pools.clear()
-
-    def connection_from_host(self, host, port=None, scheme="http", pool_kwargs=None):
-        """
-        Get a :class:`ConnectionPool` based on the host, port, and scheme.
-
-        If ``port`` isn't given, it will be derived from the ``scheme`` using
-        ``urllib3.connectionpool.port_by_scheme``. If ``pool_kwargs`` is
-        provided, it is merged with the instance's ``connection_pool_kw``
-        variable and used to create the new connection pool, if one is
-        needed.
-        """
-
-        if not host:
-            raise LocationValueError("No host specified.")
-
-        request_context = self._merge_pool_kwargs(pool_kwargs)
-        request_context["scheme"] = scheme or "http"
-        if not port:
-            port = port_by_scheme.get(request_context["scheme"].lower(), 80)
-        request_context["port"] = port
-        request_context["host"] = host
-
-        return self.connection_from_context(request_context)
-
-    def connection_from_context(self, request_context):
-        """
-        Get a :class:`ConnectionPool` based on the request context.
-
-        ``request_context`` must at least contain the ``scheme`` key and its
-        value must be a key in ``key_fn_by_scheme`` instance variable.
-        """
-        scheme = request_context["scheme"].lower()
-        pool_key_constructor = self.key_fn_by_scheme[scheme]
-        pool_key = pool_key_constructor(request_context)
-
-        return self.connection_from_pool_key(pool_key, request_context=request_context)
-
-    def connection_from_pool_key(self, pool_key, request_context=None):
-        """
-        Get a :class:`ConnectionPool` based on the provided pool key.
-
-        ``pool_key`` should be a namedtuple that only contains immutable
-        objects. At a minimum it must have the ``scheme``, ``host``, and
-        ``port`` fields.
-        """
-        with self.pools.lock:
-            # If the scheme, host, or port doesn't match existing open
-            # connections, open a new ConnectionPool.
-            pool = self.pools.get(pool_key)
-            if pool:
-                return pool
-
-            # Make a fresh ConnectionPool of the desired type
-            scheme = request_context["scheme"]
-            host = request_context["host"]
-            port = request_context["port"]
-            pool = self._new_pool(scheme, host, port, request_context=request_context)
-            self.pools[pool_key] = pool
-
-        return pool
-
-    def connection_from_url(self, url, pool_kwargs=None):
-        """
-        Similar to :func:`urllib3.connectionpool.connection_from_url`.
-
-        If ``pool_kwargs`` is not provided and a new pool needs to be
-        constructed, ``self.connection_pool_kw`` is used to initialize
-        the :class:`urllib3.connectionpool.ConnectionPool`. If ``pool_kwargs``
-        is provided, it is used instead. Note that if a new pool does not
-        need to be created for the request, the provided ``pool_kwargs`` are
-        not used.
-        """
-        u = parse_url(url)
-        return self.connection_from_host(
-            u.host, port=u.port, scheme=u.scheme, pool_kwargs=pool_kwargs
-        )
-
-    def _merge_pool_kwargs(self, override):
-        """
-        Merge a dictionary of override values for self.connection_pool_kw.
-
-        This does not modify self.connection_pool_kw and returns a new dict.
-        Any keys in the override dictionary with a value of ``None`` are
-        removed from the merged dictionary.
-        """
-        base_pool_kwargs = self.connection_pool_kw.copy()
-        if override:
-            for key, value in override.items():
-                if value is None:
-                    try:
-                        del base_pool_kwargs[key]
-                    except KeyError:
-                        pass
-                else:
-                    base_pool_kwargs[key] = value
-        return base_pool_kwargs
-
-    def urlopen(self, method, url, redirect=True, **kw):
-        """
-        Same as :meth:`urllib3.connectionpool.HTTPConnectionPool.urlopen`
-        with custom cross-host redirect logic and only sends the request-uri
-        portion of the ``url``.
-
-        The given ``url`` parameter must be absolute, such that an appropriate
-        :class:`urllib3.connectionpool.ConnectionPool` can be chosen for it.
-        """
-        u = parse_url(url)
-        conn = self.connection_from_host(u.host, port=u.port, scheme=u.scheme)
-
-        kw["assert_same_host"] = False
-        kw["redirect"] = False
-
-        if "headers" not in kw:
-            kw["headers"] = self.headers.copy()
-
-        if self.proxy is not None and u.scheme == "http":
-            response = conn.urlopen(method, url, **kw)
-        else:
-            response = conn.urlopen(method, u.request_uri, **kw)
-
-        redirect_location = redirect and response.get_redirect_location()
-        if not redirect_location:
-            return response
-
-        # Support relative URLs for redirecting.
-        redirect_location = urljoin(url, redirect_location)
-
-        # RFC 7231, Section 6.4.4
-        if response.status == 303:
-            method = "GET"
-
-        retries = kw.get("retries")
-        if not isinstance(retries, Retry):
-            retries = Retry.from_int(retries, redirect=redirect)
-
-        # Strip headers marked as unsafe to forward to the redirected location.
-        # Check remove_headers_on_redirect to avoid a potential network call within
-        # conn.is_same_host() which may use socket.gethostbyname() in the future.
-        if retries.remove_headers_on_redirect and not conn.is_same_host(
-            redirect_location
-        ):
-            headers = list(six.iterkeys(kw["headers"]))
-            for header in headers:
-                if header.lower() in retries.remove_headers_on_redirect:
-                    kw["headers"].pop(header, None)
-
-        try:
-            retries = retries.increment(method, url, response=response, _pool=conn)
-        except MaxRetryError:
-            if retries.raise_on_redirect:
-                raise
-            return response
-
-        kw["retries"] = retries
-        kw["redirect"] = redirect
-
-        log.info("Redirecting %s -> %s", url, redirect_location)
-        return self.urlopen(method, redirect_location, **kw)
-
-
-class ProxyManager(PoolManager):
-    """
-    Behaves just like :class:`PoolManager`, but sends all requests through
-    the defined proxy, using the CONNECT method for HTTPS URLs.
-
-    :param proxy_url:
-        The URL of the proxy to be used.
-
-    :param proxy_headers:
-        A dictionary containing headers that will be sent to the proxy. In case
-        of HTTP they are being sent with each request, while in the
-        HTTPS/CONNECT case they are sent only once. Could be used for proxy
-        authentication.
-
-    Example:
-        >>> proxy = urllib3.ProxyManager('http://localhost:3128/')
-        >>> r1 = proxy.request('GET', 'http://google.com/')
-        >>> r2 = proxy.request('GET', 'http://httpbin.org/')
-        >>> len(proxy.pools)
-        1
-        >>> r3 = proxy.request('GET', 'https://httpbin.org/')
-        >>> r4 = proxy.request('GET', 'https://twitter.com/')
-        >>> len(proxy.pools)
-        3
-
-    """
-
-    def __init__(
-        self,
-        proxy_url,
-        num_pools=10,
-        headers=None,
-        proxy_headers=None,
-        **connection_pool_kw
-    ):
-
-        if isinstance(proxy_url, HTTPConnectionPool):
-            proxy_url = "%s://%s:%i" % (
-                proxy_url.scheme,
-                proxy_url.host,
-                proxy_url.port,
-            )
-        proxy = parse_url(proxy_url)
-        if not proxy.port:
-            port = port_by_scheme.get(proxy.scheme, 80)
-            proxy = proxy._replace(port=port)
-
-        if proxy.scheme not in ("http", "https"):
-            raise ProxySchemeUnknown(proxy.scheme)
-
-        self.proxy = proxy
-        self.proxy_headers = proxy_headers or {}
-
-        connection_pool_kw["_proxy"] = self.proxy
-        connection_pool_kw["_proxy_headers"] = self.proxy_headers
-
-        super(ProxyManager, self).__init__(num_pools, headers, **connection_pool_kw)
-
-    def connection_from_host(self, host, port=None, scheme="http", pool_kwargs=None):
-        if scheme == "https":
-            return super(ProxyManager, self).connection_from_host(
-                host, port, scheme, pool_kwargs=pool_kwargs
-            )
-
-        return super(ProxyManager, self).connection_from_host(
-            self.proxy.host, self.proxy.port, self.proxy.scheme, pool_kwargs=pool_kwargs
-        )
-
-    def _set_proxy_headers(self, url, headers=None):
-        """
-        Sets headers needed by proxies: specifically, the Accept and Host
-        headers. Only sets headers not provided by the user.
-        """
-        headers_ = {"Accept": "*/*"}
-
-        netloc = parse_url(url).netloc
-        if netloc:
-            headers_["Host"] = netloc
-
-        if headers:
-            headers_.update(headers)
-        return headers_
-
-    def urlopen(self, method, url, redirect=True, **kw):
-        "Same as HTTP(S)ConnectionPool.urlopen, ``url`` must be absolute."
-        u = parse_url(url)
-
-        if u.scheme == "http":
-            # For proxied HTTPS requests, httplib sets the necessary headers
-            # on the CONNECT to the proxy. For HTTP, we'll definitely
-            # need to set 'Host' at the very least.
-            headers = kw.get("headers", self.headers)
-            kw["headers"] = self._set_proxy_headers(url, headers)
-
-        return super(ProxyManager, self).urlopen(method, url, redirect=redirect, **kw)
-
-
-def proxy_from_url(url, **kw):
-    return ProxyManager(proxy_url=url, **kw)
diff --git a/venv/lib/python3.7/site-packages/urllib3/request.py b/venv/lib/python3.7/site-packages/urllib3/request.py
deleted file mode 100644
index 55f160b..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/request.py
+++ /dev/null
@@ -1,171 +0,0 @@
-from __future__ import absolute_import
-
-from .filepost import encode_multipart_formdata
-from .packages.six.moves.urllib.parse import urlencode
-
-
-__all__ = ["RequestMethods"]
-
-
-class RequestMethods(object):
-    """
-    Convenience mixin for classes who implement a :meth:`urlopen` method, such
-    as :class:`~urllib3.connectionpool.HTTPConnectionPool` and
-    :class:`~urllib3.poolmanager.PoolManager`.
-
-    Provides behavior for making common types of HTTP request methods and
-    decides which type of request field encoding to use.
-
-    Specifically,
-
-    :meth:`.request_encode_url` is for sending requests whose fields are
-    encoded in the URL (such as GET, HEAD, DELETE).
-
-    :meth:`.request_encode_body` is for sending requests whose fields are
-    encoded in the *body* of the request using multipart or www-form-urlencoded
-    (such as for POST, PUT, PATCH).
-
-    :meth:`.request` is for making any kind of request, it will look up the
-    appropriate encoding format and use one of the above two methods to make
-    the request.
-
-    Initializer parameters:
-
-    :param headers:
-        Headers to include with all requests, unless other headers are given
-        explicitly.
-    """
-
-    _encode_url_methods = {"DELETE", "GET", "HEAD", "OPTIONS"}
-
-    def __init__(self, headers=None):
-        self.headers = headers or {}
-
-    def urlopen(
-        self,
-        method,
-        url,
-        body=None,
-        headers=None,
-        encode_multipart=True,
-        multipart_boundary=None,
-        **kw
-    ):  # Abstract
-        raise NotImplementedError(
-            "Classes extending RequestMethods must implement "
-            "their own ``urlopen`` method."
-        )
-
-    def request(self, method, url, fields=None, headers=None, **urlopen_kw):
-        """
-        Make a request using :meth:`urlopen` with the appropriate encoding of
-        ``fields`` based on the ``method`` used.
-
-        This is a convenience method that requires the least amount of manual
-        effort. It can be used in most situations, while still having the
-        option to drop down to more specific methods when necessary, such as
-        :meth:`request_encode_url`, :meth:`request_encode_body`,
-        or even the lowest level :meth:`urlopen`.
-        """
-        method = method.upper()
-
-        urlopen_kw["request_url"] = url
-
-        if method in self._encode_url_methods:
-            return self.request_encode_url(
-                method, url, fields=fields, headers=headers, **urlopen_kw
-            )
-        else:
-            return self.request_encode_body(
-                method, url, fields=fields, headers=headers, **urlopen_kw
-            )
-
-    def request_encode_url(self, method, url, fields=None, headers=None, **urlopen_kw):
-        """
-        Make a request using :meth:`urlopen` with the ``fields`` encoded in
-        the url. This is useful for request methods like GET, HEAD, DELETE, etc.
-        """
-        if headers is None:
-            headers = self.headers
-
-        extra_kw = {"headers": headers}
-        extra_kw.update(urlopen_kw)
-
-        if fields:
-            url += "?" + urlencode(fields)
-
-        return self.urlopen(method, url, **extra_kw)
-
-    def request_encode_body(
-        self,
-        method,
-        url,
-        fields=None,
-        headers=None,
-        encode_multipart=True,
-        multipart_boundary=None,
-        **urlopen_kw
-    ):
-        """
-        Make a request using :meth:`urlopen` with the ``fields`` encoded in
-        the body. This is useful for request methods like POST, PUT, PATCH, etc.
-
-        When ``encode_multipart=True`` (default), then
-        :meth:`urllib3.filepost.encode_multipart_formdata` is used to encode
-        the payload with the appropriate content type. Otherwise
-        :meth:`urllib.urlencode` is used with the
-        'application/x-www-form-urlencoded' content type.
-
-        Multipart encoding must be used when posting files, and it's reasonably
-        safe to use it in other times too. However, it may break request
-        signing, such as with OAuth.
-
-        Supports an optional ``fields`` parameter of key/value strings AND
-        key/filetuple. A filetuple is a (filename, data, MIME type) tuple where
-        the MIME type is optional. For example::
-
-            fields = {
-                'foo': 'bar',
-                'fakefile': ('foofile.txt', 'contents of foofile'),
-                'realfile': ('barfile.txt', open('realfile').read()),
-                'typedfile': ('bazfile.bin', open('bazfile').read(),
-                              'image/jpeg'),
-                'nonamefile': 'contents of nonamefile field',
-            }
-
-        When uploading a file, providing a filename (the first parameter of the
-        tuple) is optional but recommended to best mimic behavior of browsers.
-
-        Note that if ``headers`` are supplied, the 'Content-Type' header will
-        be overwritten because it depends on the dynamic random boundary string
-        which is used to compose the body of the request. The random boundary
-        string can be explicitly set with the ``multipart_boundary`` parameter.
-        """
-        if headers is None:
-            headers = self.headers
-
-        extra_kw = {"headers": {}}
-
-        if fields:
-            if "body" in urlopen_kw:
-                raise TypeError(
-                    "request got values for both 'fields' and 'body', can only specify one."
-                )
-
-            if encode_multipart:
-                body, content_type = encode_multipart_formdata(
-                    fields, boundary=multipart_boundary
-                )
-            else:
-                body, content_type = (
-                    urlencode(fields),
-                    "application/x-www-form-urlencoded",
-                )
-
-            extra_kw["body"] = body
-            extra_kw["headers"] = {"Content-Type": content_type}
-
-        extra_kw["headers"].update(headers)
-        extra_kw.update(urlopen_kw)
-
-        return self.urlopen(method, url, **extra_kw)
diff --git a/venv/lib/python3.7/site-packages/urllib3/response.py b/venv/lib/python3.7/site-packages/urllib3/response.py
deleted file mode 100644
index adc321e..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/response.py
+++ /dev/null
@@ -1,809 +0,0 @@
-from __future__ import absolute_import
-from contextlib import contextmanager
-import zlib
-import io
-import logging
-from socket import timeout as SocketTimeout
-from socket import error as SocketError
-
-try:
-    import brotli
-except ImportError:
-    brotli = None
-
-from ._collections import HTTPHeaderDict
-from .exceptions import (
-    BodyNotHttplibCompatible,
-    ProtocolError,
-    DecodeError,
-    ReadTimeoutError,
-    ResponseNotChunked,
-    IncompleteRead,
-    InvalidHeader,
-)
-from .packages.six import string_types as basestring, PY3
-from .packages.six.moves import http_client as httplib
-from .connection import HTTPException, BaseSSLError
-from .util.response import is_fp_closed, is_response_to_head
-
-log = logging.getLogger(__name__)
-
-
-class DeflateDecoder(object):
-    def __init__(self):
-        self._first_try = True
-        self._data = b""
-        self._obj = zlib.decompressobj()
-
-    def __getattr__(self, name):
-        return getattr(self._obj, name)
-
-    def decompress(self, data):
-        if not data:
-            return data
-
-        if not self._first_try:
-            return self._obj.decompress(data)
-
-        self._data += data
-        try:
-            decompressed = self._obj.decompress(data)
-            if decompressed:
-                self._first_try = False
-                self._data = None
-            return decompressed
-        except zlib.error:
-            self._first_try = False
-            self._obj = zlib.decompressobj(-zlib.MAX_WBITS)
-            try:
-                return self.decompress(self._data)
-            finally:
-                self._data = None
-
-
-class GzipDecoderState(object):
-
-    FIRST_MEMBER = 0
-    OTHER_MEMBERS = 1
-    SWALLOW_DATA = 2
-
-
-class GzipDecoder(object):
-    def __init__(self):
-        self._obj = zlib.decompressobj(16 + zlib.MAX_WBITS)
-        self._state = GzipDecoderState.FIRST_MEMBER
-
-    def __getattr__(self, name):
-        return getattr(self._obj, name)
-
-    def decompress(self, data):
-        ret = bytearray()
-        if self._state == GzipDecoderState.SWALLOW_DATA or not data:
-            return bytes(ret)
-        while True:
-            try:
-                ret += self._obj.decompress(data)
-            except zlib.error:
-                previous_state = self._state
-                # Ignore data after the first error
-                self._state = GzipDecoderState.SWALLOW_DATA
-                if previous_state == GzipDecoderState.OTHER_MEMBERS:
-                    # Allow trailing garbage acceptable in other gzip clients
-                    return bytes(ret)
-                raise
-            data = self._obj.unused_data
-            if not data:
-                return bytes(ret)
-            self._state = GzipDecoderState.OTHER_MEMBERS
-            self._obj = zlib.decompressobj(16 + zlib.MAX_WBITS)
-
-
-if brotli is not None:
-
-    class BrotliDecoder(object):
-        # Supports both 'brotlipy' and 'Brotli' packages
-        # since they share an import name. The top branches
-        # are for 'brotlipy' and bottom branches for 'Brotli'
-        def __init__(self):
-            self._obj = brotli.Decompressor()
-
-        def decompress(self, data):
-            if hasattr(self._obj, "decompress"):
-                return self._obj.decompress(data)
-            return self._obj.process(data)
-
-        def flush(self):
-            if hasattr(self._obj, "flush"):
-                return self._obj.flush()
-            return b""
-
-
-class MultiDecoder(object):
-    """
-    From RFC7231:
-        If one or more encodings have been applied to a representation, the
-        sender that applied the encodings MUST generate a Content-Encoding
-        header field that lists the content codings in the order in which
-        they were applied.
-    """
-
-    def __init__(self, modes):
-        self._decoders = [_get_decoder(m.strip()) for m in modes.split(",")]
-
-    def flush(self):
-        return self._decoders[0].flush()
-
-    def decompress(self, data):
-        for d in reversed(self._decoders):
-            data = d.decompress(data)
-        return data
-
-
-def _get_decoder(mode):
-    if "," in mode:
-        return MultiDecoder(mode)
-
-    if mode == "gzip":
-        return GzipDecoder()
-
-    if brotli is not None and mode == "br":
-        return BrotliDecoder()
-
-    return DeflateDecoder()
-
-
-class HTTPResponse(io.IOBase):
-    """
-    HTTP Response container.
-
-    Backwards-compatible to httplib's HTTPResponse but the response ``body`` is
-    loaded and decoded on-demand when the ``data`` property is accessed.  This
-    class is also compatible with the Python standard library's :mod:`io`
-    module, and can hence be treated as a readable object in the context of that
-    framework.
-
-    Extra parameters for behaviour not present in httplib.HTTPResponse:
-
-    :param preload_content:
-        If True, the response's body will be preloaded during construction.
-
-    :param decode_content:
-        If True, will attempt to decode the body based on the
-        'content-encoding' header.
-
-    :param original_response:
-        When this HTTPResponse wrapper is generated from an httplib.HTTPResponse
-        object, it's convenient to include the original for debug purposes. It's
-        otherwise unused.
-
-    :param retries:
-        The retries contains the last :class:`~urllib3.util.retry.Retry` that
-        was used during the request.
-
-    :param enforce_content_length:
-        Enforce content length checking. Body returned by server must match
-        value of Content-Length header, if present. Otherwise, raise error.
-    """
-
-    CONTENT_DECODERS = ["gzip", "deflate"]
-    if brotli is not None:
-        CONTENT_DECODERS += ["br"]
-    REDIRECT_STATUSES = [301, 302, 303, 307, 308]
-
-    def __init__(
-        self,
-        body="",
-        headers=None,
-        status=0,
-        version=0,
-        reason=None,
-        strict=0,
-        preload_content=True,
-        decode_content=True,
-        original_response=None,
-        pool=None,
-        connection=None,
-        msg=None,
-        retries=None,
-        enforce_content_length=False,
-        request_method=None,
-        request_url=None,
-        auto_close=True,
-    ):
-
-        if isinstance(headers, HTTPHeaderDict):
-            self.headers = headers
-        else:
-            self.headers = HTTPHeaderDict(headers)
-        self.status = status
-        self.version = version
-        self.reason = reason
-        self.strict = strict
-        self.decode_content = decode_content
-        self.retries = retries
-        self.enforce_content_length = enforce_content_length
-        self.auto_close = auto_close
-
-        self._decoder = None
-        self._body = None
-        self._fp = None
-        self._original_response = original_response
-        self._fp_bytes_read = 0
-        self.msg = msg
-        self._request_url = request_url
-
-        if body and isinstance(body, (basestring, bytes)):
-            self._body = body
-
-        self._pool = pool
-        self._connection = connection
-
-        if hasattr(body, "read"):
-            self._fp = body
-
-        # Are we using the chunked-style of transfer encoding?
-        self.chunked = False
-        self.chunk_left = None
-        tr_enc = self.headers.get("transfer-encoding", "").lower()
-        # Don't incur the penalty of creating a list and then discarding it
-        encodings = (enc.strip() for enc in tr_enc.split(","))
-        if "chunked" in encodings:
-            self.chunked = True
-
-        # Determine length of response
-        self.length_remaining = self._init_length(request_method)
-
-        # If requested, preload the body.
-        if preload_content and not self._body:
-            self._body = self.read(decode_content=decode_content)
-
-    def get_redirect_location(self):
-        """
-        Should we redirect and where to?
-
-        :returns: Truthy redirect location string if we got a redirect status
-            code and valid location. ``None`` if redirect status and no
-            location. ``False`` if not a redirect status code.
-        """
-        if self.status in self.REDIRECT_STATUSES:
-            return self.headers.get("location")
-
-        return False
-
-    def release_conn(self):
-        if not self._pool or not self._connection:
-            return
-
-        self._pool._put_conn(self._connection)
-        self._connection = None
-
-    @property
-    def data(self):
-        # For backwords-compat with earlier urllib3 0.4 and earlier.
-        if self._body:
-            return self._body
-
-        if self._fp:
-            return self.read(cache_content=True)
-
-    @property
-    def connection(self):
-        return self._connection
-
-    def isclosed(self):
-        return is_fp_closed(self._fp)
-
-    def tell(self):
-        """
-        Obtain the number of bytes pulled over the wire so far. May differ from
-        the amount of content returned by :meth:``HTTPResponse.read`` if bytes
-        are encoded on the wire (e.g, compressed).
-        """
-        return self._fp_bytes_read
-
-    def _init_length(self, request_method):
-        """
-        Set initial length value for Response content if available.
-        """
-        length = self.headers.get("content-length")
-
-        if length is not None:
-            if self.chunked:
-                # This Response will fail with an IncompleteRead if it can't be
-                # received as chunked. This method falls back to attempt reading
-                # the response before raising an exception.
-                log.warning(
-                    "Received response with both Content-Length and "
-                    "Transfer-Encoding set. This is expressly forbidden "
-                    "by RFC 7230 sec 3.3.2. Ignoring Content-Length and "
-                    "attempting to process response as Transfer-Encoding: "
-                    "chunked."
-                )
-                return None
-
-            try:
-                # RFC 7230 section 3.3.2 specifies multiple content lengths can
-                # be sent in a single Content-Length header
-                # (e.g. Content-Length: 42, 42). This line ensures the values
-                # are all valid ints and that as long as the `set` length is 1,
-                # all values are the same. Otherwise, the header is invalid.
-                lengths = set([int(val) for val in length.split(",")])
-                if len(lengths) > 1:
-                    raise InvalidHeader(
-                        "Content-Length contained multiple "
-                        "unmatching values (%s)" % length
-                    )
-                length = lengths.pop()
-            except ValueError:
-                length = None
-            else:
-                if length < 0:
-                    length = None
-
-        # Convert status to int for comparison
-        # In some cases, httplib returns a status of "_UNKNOWN"
-        try:
-            status = int(self.status)
-        except ValueError:
-            status = 0
-
-        # Check for responses that shouldn't include a body
-        if status in (204, 304) or 100 <= status < 200 or request_method == "HEAD":
-            length = 0
-
-        return length
-
-    def _init_decoder(self):
-        """
-        Set-up the _decoder attribute if necessary.
-        """
-        # Note: content-encoding value should be case-insensitive, per RFC 7230
-        # Section 3.2
-        content_encoding = self.headers.get("content-encoding", "").lower()
-        if self._decoder is None:
-            if content_encoding in self.CONTENT_DECODERS:
-                self._decoder = _get_decoder(content_encoding)
-            elif "," in content_encoding:
-                encodings = [
-                    e.strip()
-                    for e in content_encoding.split(",")
-                    if e.strip() in self.CONTENT_DECODERS
-                ]
-                if len(encodings):
-                    self._decoder = _get_decoder(content_encoding)
-
-    DECODER_ERROR_CLASSES = (IOError, zlib.error)
-    if brotli is not None:
-        DECODER_ERROR_CLASSES += (brotli.error,)
-
-    def _decode(self, data, decode_content, flush_decoder):
-        """
-        Decode the data passed in and potentially flush the decoder.
-        """
-        if not decode_content:
-            return data
-
-        try:
-            if self._decoder:
-                data = self._decoder.decompress(data)
-        except self.DECODER_ERROR_CLASSES as e:
-            content_encoding = self.headers.get("content-encoding", "").lower()
-            raise DecodeError(
-                "Received response with content-encoding: %s, but "
-                "failed to decode it." % content_encoding,
-                e,
-            )
-        if flush_decoder:
-            data += self._flush_decoder()
-
-        return data
-
-    def _flush_decoder(self):
-        """
-        Flushes the decoder. Should only be called if the decoder is actually
-        being used.
-        """
-        if self._decoder:
-            buf = self._decoder.decompress(b"")
-            return buf + self._decoder.flush()
-
-        return b""
-
-    @contextmanager
-    def _error_catcher(self):
-        """
-        Catch low-level python exceptions, instead re-raising urllib3
-        variants, so that low-level exceptions are not leaked in the
-        high-level api.
-
-        On exit, release the connection back to the pool.
-        """
-        clean_exit = False
-
-        try:
-            try:
-                yield
-
-            except SocketTimeout:
-                # FIXME: Ideally we'd like to include the url in the ReadTimeoutError but
-                # there is yet no clean way to get at it from this context.
-                raise ReadTimeoutError(self._pool, None, "Read timed out.")
-
-            except BaseSSLError as e:
-                # FIXME: Is there a better way to differentiate between SSLErrors?
-                if "read operation timed out" not in str(e):  # Defensive:
-                    # This shouldn't happen but just in case we're missing an edge
-                    # case, let's avoid swallowing SSL errors.
-                    raise
-
-                raise ReadTimeoutError(self._pool, None, "Read timed out.")
-
-            except (HTTPException, SocketError) as e:
-                # This includes IncompleteRead.
-                raise ProtocolError("Connection broken: %r" % e, e)
-
-            # If no exception is thrown, we should avoid cleaning up
-            # unnecessarily.
-            clean_exit = True
-        finally:
-            # If we didn't terminate cleanly, we need to throw away our
-            # connection.
-            if not clean_exit:
-                # The response may not be closed but we're not going to use it
-                # anymore so close it now to ensure that the connection is
-                # released back to the pool.
-                if self._original_response:
-                    self._original_response.close()
-
-                # Closing the response may not actually be sufficient to close
-                # everything, so if we have a hold of the connection close that
-                # too.
-                if self._connection:
-                    self._connection.close()
-
-            # If we hold the original response but it's closed now, we should
-            # return the connection back to the pool.
-            if self._original_response and self._original_response.isclosed():
-                self.release_conn()
-
-    def read(self, amt=None, decode_content=None, cache_content=False):
-        """
-        Similar to :meth:`httplib.HTTPResponse.read`, but with two additional
-        parameters: ``decode_content`` and ``cache_content``.
-
-        :param amt:
-            How much of the content to read. If specified, caching is skipped
-            because it doesn't make sense to cache partial content as the full
-            response.
-
-        :param decode_content:
-            If True, will attempt to decode the body based on the
-            'content-encoding' header.
-
-        :param cache_content:
-            If True, will save the returned data such that the same result is
-            returned despite of the state of the underlying file object. This
-            is useful if you want the ``.data`` property to continue working
-            after having ``.read()`` the file object. (Overridden if ``amt`` is
-            set.)
-        """
-        self._init_decoder()
-        if decode_content is None:
-            decode_content = self.decode_content
-
-        if self._fp is None:
-            return
-
-        flush_decoder = False
-        fp_closed = getattr(self._fp, "closed", False)
-
-        with self._error_catcher():
-            if amt is None:
-                # cStringIO doesn't like amt=None
-                data = self._fp.read() if not fp_closed else b""
-                flush_decoder = True
-            else:
-                cache_content = False
-                data = self._fp.read(amt) if not fp_closed else b""
-                if (
-                    amt != 0 and not data
-                ):  # Platform-specific: Buggy versions of Python.
-                    # Close the connection when no data is returned
-                    #
-                    # This is redundant to what httplib/http.client _should_
-                    # already do.  However, versions of python released before
-                    # December 15, 2012 (http://bugs.python.org/issue16298) do
-                    # not properly close the connection in all cases. There is
-                    # no harm in redundantly calling close.
-                    self._fp.close()
-                    flush_decoder = True
-                    if self.enforce_content_length and self.length_remaining not in (
-                        0,
-                        None,
-                    ):
-                        # This is an edge case that httplib failed to cover due
-                        # to concerns of backward compatibility. We're
-                        # addressing it here to make sure IncompleteRead is
-                        # raised during streaming, so all calls with incorrect
-                        # Content-Length are caught.
-                        raise IncompleteRead(self._fp_bytes_read, self.length_remaining)
-
-        if data:
-            self._fp_bytes_read += len(data)
-            if self.length_remaining is not None:
-                self.length_remaining -= len(data)
-
-            data = self._decode(data, decode_content, flush_decoder)
-
-            if cache_content:
-                self._body = data
-
-        return data
-
-    def stream(self, amt=2 ** 16, decode_content=None):
-        """
-        A generator wrapper for the read() method. A call will block until
-        ``amt`` bytes have been read from the connection or until the
-        connection is closed.
-
-        :param amt:
-            How much of the content to read. The generator will return up to
-            much data per iteration, but may return less. This is particularly
-            likely when using compressed data. However, the empty string will
-            never be returned.
-
-        :param decode_content:
-            If True, will attempt to decode the body based on the
-            'content-encoding' header.
-        """
-        if self.chunked and self.supports_chunked_reads():
-            for line in self.read_chunked(amt, decode_content=decode_content):
-                yield line
-        else:
-            while not is_fp_closed(self._fp):
-                data = self.read(amt=amt, decode_content=decode_content)
-
-                if data:
-                    yield data
-
-    @classmethod
-    def from_httplib(ResponseCls, r, **response_kw):
-        """
-        Given an :class:`httplib.HTTPResponse` instance ``r``, return a
-        corresponding :class:`urllib3.response.HTTPResponse` object.
-
-        Remaining parameters are passed to the HTTPResponse constructor, along
-        with ``original_response=r``.
-        """
-        headers = r.msg
-
-        if not isinstance(headers, HTTPHeaderDict):
-            if PY3:
-                headers = HTTPHeaderDict(headers.items())
-            else:
-                # Python 2.7
-                headers = HTTPHeaderDict.from_httplib(headers)
-
-        # HTTPResponse objects in Python 3 don't have a .strict attribute
-        strict = getattr(r, "strict", 0)
-        resp = ResponseCls(
-            body=r,
-            headers=headers,
-            status=r.status,
-            version=r.version,
-            reason=r.reason,
-            strict=strict,
-            original_response=r,
-            **response_kw
-        )
-        return resp
-
-    # Backwards-compatibility methods for httplib.HTTPResponse
-    def getheaders(self):
-        return self.headers
-
-    def getheader(self, name, default=None):
-        return self.headers.get(name, default)
-
-    # Backwards compatibility for http.cookiejar
-    def info(self):
-        return self.headers
-
-    # Overrides from io.IOBase
-    def close(self):
-        if not self.closed:
-            self._fp.close()
-
-        if self._connection:
-            self._connection.close()
-
-        if not self.auto_close:
-            io.IOBase.close(self)
-
-    @property
-    def closed(self):
-        if not self.auto_close:
-            return io.IOBase.closed.__get__(self)
-        elif self._fp is None:
-            return True
-        elif hasattr(self._fp, "isclosed"):
-            return self._fp.isclosed()
-        elif hasattr(self._fp, "closed"):
-            return self._fp.closed
-        else:
-            return True
-
-    def fileno(self):
-        if self._fp is None:
-            raise IOError("HTTPResponse has no file to get a fileno from")
-        elif hasattr(self._fp, "fileno"):
-            return self._fp.fileno()
-        else:
-            raise IOError(
-                "The file-like object this HTTPResponse is wrapped "
-                "around has no file descriptor"
-            )
-
-    def flush(self):
-        if (
-            self._fp is not None
-            and hasattr(self._fp, "flush")
-            and not getattr(self._fp, "closed", False)
-        ):
-            return self._fp.flush()
-
-    def readable(self):
-        # This method is required for `io` module compatibility.
-        return True
-
-    def readinto(self, b):
-        # This method is required for `io` module compatibility.
-        temp = self.read(len(b))
-        if len(temp) == 0:
-            return 0
-        else:
-            b[: len(temp)] = temp
-            return len(temp)
-
-    def supports_chunked_reads(self):
-        """
-        Checks if the underlying file-like object looks like a
-        httplib.HTTPResponse object. We do this by testing for the fp
-        attribute. If it is present we assume it returns raw chunks as
-        processed by read_chunked().
-        """
-        return hasattr(self._fp, "fp")
-
-    def _update_chunk_length(self):
-        # First, we'll figure out length of a chunk and then
-        # we'll try to read it from socket.
-        if self.chunk_left is not None:
-            return
-        line = self._fp.fp.readline()
-        line = line.split(b";", 1)[0]
-        try:
-            self.chunk_left = int(line, 16)
-        except ValueError:
-            # Invalid chunked protocol response, abort.
-            self.close()
-            raise httplib.IncompleteRead(line)
-
-    def _handle_chunk(self, amt):
-        returned_chunk = None
-        if amt is None:
-            chunk = self._fp._safe_read(self.chunk_left)
-            returned_chunk = chunk
-            self._fp._safe_read(2)  # Toss the CRLF at the end of the chunk.
-            self.chunk_left = None
-        elif amt < self.chunk_left:
-            value = self._fp._safe_read(amt)
-            self.chunk_left = self.chunk_left - amt
-            returned_chunk = value
-        elif amt == self.chunk_left:
-            value = self._fp._safe_read(amt)
-            self._fp._safe_read(2)  # Toss the CRLF at the end of the chunk.
-            self.chunk_left = None
-            returned_chunk = value
-        else:  # amt > self.chunk_left
-            returned_chunk = self._fp._safe_read(self.chunk_left)
-            self._fp._safe_read(2)  # Toss the CRLF at the end of the chunk.
-            self.chunk_left = None
-        return returned_chunk
-
-    def read_chunked(self, amt=None, decode_content=None):
-        """
-        Similar to :meth:`HTTPResponse.read`, but with an additional
-        parameter: ``decode_content``.
-
-        :param amt:
-            How much of the content to read. If specified, caching is skipped
-            because it doesn't make sense to cache partial content as the full
-            response.
-
-        :param decode_content:
-            If True, will attempt to decode the body based on the
-            'content-encoding' header.
-        """
-        self._init_decoder()
-        # FIXME: Rewrite this method and make it a class with a better structured logic.
-        if not self.chunked:
-            raise ResponseNotChunked(
-                "Response is not chunked. "
-                "Header 'transfer-encoding: chunked' is missing."
-            )
-        if not self.supports_chunked_reads():
-            raise BodyNotHttplibCompatible(
-                "Body should be httplib.HTTPResponse like. "
-                "It should have have an fp attribute which returns raw chunks."
-            )
-
-        with self._error_catcher():
-            # Don't bother reading the body of a HEAD request.
-            if self._original_response and is_response_to_head(self._original_response):
-                self._original_response.close()
-                return
-
-            # If a response is already read and closed
-            # then return immediately.
-            if self._fp.fp is None:
-                return
-
-            while True:
-                self._update_chunk_length()
-                if self.chunk_left == 0:
-                    break
-                chunk = self._handle_chunk(amt)
-                decoded = self._decode(
-                    chunk, decode_content=decode_content, flush_decoder=False
-                )
-                if decoded:
-                    yield decoded
-
-            if decode_content:
-                # On CPython and PyPy, we should never need to flush the
-                # decoder. However, on Jython we *might* need to, so
-                # lets defensively do it anyway.
-                decoded = self._flush_decoder()
-                if decoded:  # Platform-specific: Jython.
-                    yield decoded
-
-            # Chunk content ends with \r\n: discard it.
-            while True:
-                line = self._fp.fp.readline()
-                if not line:
-                    # Some sites may not end with '\r\n'.
-                    break
-                if line == b"\r\n":
-                    break
-
-            # We read everything; close the "file".
-            if self._original_response:
-                self._original_response.close()
-
-    def geturl(self):
-        """
-        Returns the URL that was the source of this response.
-        If the request that generated this response redirected, this method
-        will return the final redirect location.
-        """
-        if self.retries is not None and len(self.retries.history):
-            return self.retries.history[-1].redirect_location
-        else:
-            return self._request_url
-
-    def __iter__(self):
-        buffer = [b""]
-        for chunk in self.stream(decode_content=True):
-            if b"\n" in chunk:
-                chunk = chunk.split(b"\n")
-                yield b"".join(buffer) + chunk[0] + b"\n"
-                for x in chunk[1:-1]:
-                    yield x + b"\n"
-                if chunk[-1]:
-                    buffer = [chunk[-1]]
-                else:
-                    buffer = []
-            else:
-                buffer.append(chunk)
-        if buffer:
-            yield b"".join(buffer)
diff --git a/venv/lib/python3.7/site-packages/urllib3/util/__init__.py b/venv/lib/python3.7/site-packages/urllib3/util/__init__.py
deleted file mode 100644
index a96c73a..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/util/__init__.py
+++ /dev/null
@@ -1,46 +0,0 @@
-from __future__ import absolute_import
-
-# For backwards compatibility, provide imports that used to be here.
-from .connection import is_connection_dropped
-from .request import make_headers
-from .response import is_fp_closed
-from .ssl_ import (
-    SSLContext,
-    HAS_SNI,
-    IS_PYOPENSSL,
-    IS_SECURETRANSPORT,
-    assert_fingerprint,
-    resolve_cert_reqs,
-    resolve_ssl_version,
-    ssl_wrap_socket,
-    PROTOCOL_TLS,
-)
-from .timeout import current_time, Timeout
-
-from .retry import Retry
-from .url import get_host, parse_url, split_first, Url
-from .wait import wait_for_read, wait_for_write
-
-__all__ = (
-    "HAS_SNI",
-    "IS_PYOPENSSL",
-    "IS_SECURETRANSPORT",
-    "SSLContext",
-    "PROTOCOL_TLS",
-    "Retry",
-    "Timeout",
-    "Url",
-    "assert_fingerprint",
-    "current_time",
-    "is_connection_dropped",
-    "is_fp_closed",
-    "get_host",
-    "parse_url",
-    "make_headers",
-    "resolve_cert_reqs",
-    "resolve_ssl_version",
-    "split_first",
-    "ssl_wrap_socket",
-    "wait_for_read",
-    "wait_for_write",
-)
diff --git a/venv/lib/python3.7/site-packages/urllib3/util/connection.py b/venv/lib/python3.7/site-packages/urllib3/util/connection.py
deleted file mode 100644
index 86f0a3b..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/util/connection.py
+++ /dev/null
@@ -1,138 +0,0 @@
-from __future__ import absolute_import
-import socket
-from .wait import NoWayToWaitForSocketError, wait_for_read
-from ..contrib import _appengine_environ
-
-
-def is_connection_dropped(conn):  # Platform-specific
-    """
-    Returns True if the connection is dropped and should be closed.
-
-    :param conn:
-        :class:`httplib.HTTPConnection` object.
-
-    Note: For platforms like AppEngine, this will always return ``False`` to
-    let the platform handle connection recycling transparently for us.
-    """
-    sock = getattr(conn, "sock", False)
-    if sock is False:  # Platform-specific: AppEngine
-        return False
-    if sock is None:  # Connection already closed (such as by httplib).
-        return True
-    try:
-        # Returns True if readable, which here means it's been dropped
-        return wait_for_read(sock, timeout=0.0)
-    except NoWayToWaitForSocketError:  # Platform-specific: AppEngine
-        return False
-
-
-# This function is copied from socket.py in the Python 2.7 standard
-# library test suite. Added to its signature is only `socket_options`.
-# One additional modification is that we avoid binding to IPv6 servers
-# discovered in DNS if the system doesn't have IPv6 functionality.
-def create_connection(
-    address,
-    timeout=socket._GLOBAL_DEFAULT_TIMEOUT,
-    source_address=None,
-    socket_options=None,
-):
-    """Connect to *address* and return the socket object.
-
-    Convenience function.  Connect to *address* (a 2-tuple ``(host,
-    port)``) and return the socket object.  Passing the optional
-    *timeout* parameter will set the timeout on the socket instance
-    before attempting to connect.  If no *timeout* is supplied, the
-    global default timeout setting returned by :func:`getdefaulttimeout`
-    is used.  If *source_address* is set it must be a tuple of (host, port)
-    for the socket to bind as a source address before making the connection.
-    An host of '' or port 0 tells the OS to use the default.
-    """
-
-    host, port = address
-    if host.startswith("["):
-        host = host.strip("[]")
-    err = None
-
-    # Using the value from allowed_gai_family() in the context of getaddrinfo lets
-    # us select whether to work with IPv4 DNS records, IPv6 records, or both.
-    # The original create_connection function always returns all records.
-    family = allowed_gai_family()
-
-    for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM):
-        af, socktype, proto, canonname, sa = res
-        sock = None
-        try:
-            sock = socket.socket(af, socktype, proto)
-
-            # If provided, set socket level options before connecting.
-            _set_socket_options(sock, socket_options)
-
-            if timeout is not socket._GLOBAL_DEFAULT_TIMEOUT:
-                sock.settimeout(timeout)
-            if source_address:
-                sock.bind(source_address)
-            sock.connect(sa)
-            return sock
-
-        except socket.error as e:
-            err = e
-            if sock is not None:
-                sock.close()
-                sock = None
-
-    if err is not None:
-        raise err
-
-    raise socket.error("getaddrinfo returns an empty list")
-
-
-def _set_socket_options(sock, options):
-    if options is None:
-        return
-
-    for opt in options:
-        sock.setsockopt(*opt)
-
-
-def allowed_gai_family():
-    """This function is designed to work in the context of
-    getaddrinfo, where family=socket.AF_UNSPEC is the default and
-    will perform a DNS search for both IPv6 and IPv4 records."""
-
-    family = socket.AF_INET
-    if HAS_IPV6:
-        family = socket.AF_UNSPEC
-    return family
-
-
-def _has_ipv6(host):
-    """ Returns True if the system can bind an IPv6 address. """
-    sock = None
-    has_ipv6 = False
-
-    # App Engine doesn't support IPV6 sockets and actually has a quota on the
-    # number of sockets that can be used, so just early out here instead of
-    # creating a socket needlessly.
-    # See https://github.com/urllib3/urllib3/issues/1446
-    if _appengine_environ.is_appengine_sandbox():
-        return False
-
-    if socket.has_ipv6:
-        # has_ipv6 returns true if cPython was compiled with IPv6 support.
-        # It does not tell us if the system has IPv6 support enabled. To
-        # determine that we must bind to an IPv6 address.
-        # https://github.com/urllib3/urllib3/pull/611
-        # https://bugs.python.org/issue658327
-        try:
-            sock = socket.socket(socket.AF_INET6)
-            sock.bind((host, 0))
-            has_ipv6 = True
-        except Exception:
-            pass
-
-    if sock:
-        sock.close()
-    return has_ipv6
-
-
-HAS_IPV6 = _has_ipv6("::1")
diff --git a/venv/lib/python3.7/site-packages/urllib3/util/queue.py b/venv/lib/python3.7/site-packages/urllib3/util/queue.py
deleted file mode 100644
index d3d379a..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/util/queue.py
+++ /dev/null
@@ -1,21 +0,0 @@
-import collections
-from ..packages import six
-from ..packages.six.moves import queue
-
-if six.PY2:
-    # Queue is imported for side effects on MS Windows. See issue #229.
-    import Queue as _unused_module_Queue  # noqa: F401
-
-
-class LifoQueue(queue.Queue):
-    def _init(self, _):
-        self.queue = collections.deque()
-
-    def _qsize(self, len=len):
-        return len(self.queue)
-
-    def _put(self, item):
-        self.queue.append(item)
-
-    def _get(self):
-        return self.queue.pop()
diff --git a/venv/lib/python3.7/site-packages/urllib3/util/request.py b/venv/lib/python3.7/site-packages/urllib3/util/request.py
deleted file mode 100644
index 3b7bb54..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/util/request.py
+++ /dev/null
@@ -1,135 +0,0 @@
-from __future__ import absolute_import
-from base64 import b64encode
-
-from ..packages.six import b, integer_types
-from ..exceptions import UnrewindableBodyError
-
-ACCEPT_ENCODING = "gzip,deflate"
-try:
-    import brotli as _unused_module_brotli  # noqa: F401
-except ImportError:
-    pass
-else:
-    ACCEPT_ENCODING += ",br"
-
-_FAILEDTELL = object()
-
-
-def make_headers(
-    keep_alive=None,
-    accept_encoding=None,
-    user_agent=None,
-    basic_auth=None,
-    proxy_basic_auth=None,
-    disable_cache=None,
-):
-    """
-    Shortcuts for generating request headers.
-
-    :param keep_alive:
-        If ``True``, adds 'connection: keep-alive' header.
-
-    :param accept_encoding:
-        Can be a boolean, list, or string.
-        ``True`` translates to 'gzip,deflate'.
-        List will get joined by comma.
-        String will be used as provided.
-
-    :param user_agent:
-        String representing the user-agent you want, such as
-        "python-urllib3/0.6"
-
-    :param basic_auth:
-        Colon-separated username:password string for 'authorization: basic ...'
-        auth header.
-
-    :param proxy_basic_auth:
-        Colon-separated username:password string for 'proxy-authorization: basic ...'
-        auth header.
-
-    :param disable_cache:
-        If ``True``, adds 'cache-control: no-cache' header.
-
-    Example::
-
-        >>> make_headers(keep_alive=True, user_agent="Batman/1.0")
-        {'connection': 'keep-alive', 'user-agent': 'Batman/1.0'}
-        >>> make_headers(accept_encoding=True)
-        {'accept-encoding': 'gzip,deflate'}
-    """
-    headers = {}
-    if accept_encoding:
-        if isinstance(accept_encoding, str):
-            pass
-        elif isinstance(accept_encoding, list):
-            accept_encoding = ",".join(accept_encoding)
-        else:
-            accept_encoding = ACCEPT_ENCODING
-        headers["accept-encoding"] = accept_encoding
-
-    if user_agent:
-        headers["user-agent"] = user_agent
-
-    if keep_alive:
-        headers["connection"] = "keep-alive"
-
-    if basic_auth:
-        headers["authorization"] = "Basic " + b64encode(b(basic_auth)).decode("utf-8")
-
-    if proxy_basic_auth:
-        headers["proxy-authorization"] = "Basic " + b64encode(
-            b(proxy_basic_auth)
-        ).decode("utf-8")
-
-    if disable_cache:
-        headers["cache-control"] = "no-cache"
-
-    return headers
-
-
-def set_file_position(body, pos):
-    """
-    If a position is provided, move file to that point.
-    Otherwise, we'll attempt to record a position for future use.
-    """
-    if pos is not None:
-        rewind_body(body, pos)
-    elif getattr(body, "tell", None) is not None:
-        try:
-            pos = body.tell()
-        except (IOError, OSError):
-            # This differentiates from None, allowing us to catch
-            # a failed `tell()` later when trying to rewind the body.
-            pos = _FAILEDTELL
-
-    return pos
-
-
-def rewind_body(body, body_pos):
-    """
-    Attempt to rewind body to a certain position.
-    Primarily used for request redirects and retries.
-
-    :param body:
-        File-like object that supports seek.
-
-    :param int pos:
-        Position to seek to in file.
-    """
-    body_seek = getattr(body, "seek", None)
-    if body_seek is not None and isinstance(body_pos, integer_types):
-        try:
-            body_seek(body_pos)
-        except (IOError, OSError):
-            raise UnrewindableBodyError(
-                "An error occurred when rewinding request body for redirect/retry."
-            )
-    elif body_pos is _FAILEDTELL:
-        raise UnrewindableBodyError(
-            "Unable to record file position for rewinding "
-            "request body during a redirect/retry."
-        )
-    else:
-        raise ValueError(
-            "body_pos must be of type integer, instead it was %s." % type(body_pos)
-        )
diff --git a/venv/lib/python3.7/site-packages/urllib3/util/response.py b/venv/lib/python3.7/site-packages/urllib3/util/response.py
deleted file mode 100644
index 715868d..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/util/response.py
+++ /dev/null
@@ -1,86 +0,0 @@
-from __future__ import absolute_import
-from ..packages.six.moves import http_client as httplib
-
-from ..exceptions import HeaderParsingError
-
-
-def is_fp_closed(obj):
-    """
-    Checks whether a given file-like object is closed.
-
-    :param obj:
-        The file-like object to check.
-    """
-
-    try:
-        # Check `isclosed()` first, in case Python3 doesn't set `closed`.
-        # GH Issue #928
-        return obj.isclosed()
-    except AttributeError:
-        pass
-
-    try:
-        # Check via the official file-like-object way.
-        return obj.closed
-    except AttributeError:
-        pass
-
-    try:
-        # Check if the object is a container for another file-like object that
-        # gets released on exhaustion (e.g. HTTPResponse).
-        return obj.fp is None
-    except AttributeError:
-        pass
-
-    raise ValueError("Unable to determine whether fp is closed.")
-
-
-def assert_header_parsing(headers):
-    """
-    Asserts whether all headers have been successfully parsed.
-    Extracts encountered errors from the result of parsing headers.
-
-    Only works on Python 3.
-
-    :param headers: Headers to verify.
-    :type headers: `httplib.HTTPMessage`.
-
-    :raises urllib3.exceptions.HeaderParsingError:
-        If parsing errors are found.
-    """
-
-    # This will fail silently if we pass in the wrong kind of parameter.
-    # To make debugging easier add an explicit check.
-    if not isinstance(headers, httplib.HTTPMessage):
-        raise TypeError("expected httplib.Message, got {0}.".format(type(headers)))
-
-    defects = getattr(headers, "defects", None)
-    get_payload = getattr(headers, "get_payload", None)
-
-    unparsed_data = None
-    if get_payload:
-        # get_payload is actually email.message.Message.get_payload;
-        # we're only interested in the result if it's not a multipart message
-        if not headers.is_multipart():
-            payload = get_payload()
-
-            if isinstance(payload, (bytes, str)):
-                unparsed_data = payload
-
-    if defects or unparsed_data:
-        raise HeaderParsingError(defects=defects, unparsed_data=unparsed_data)
-
-
-def is_response_to_head(response):
-    """
-    Checks whether the request of a response has been a HEAD-request.
-    Handles the quirks of AppEngine.
-
-    :param conn:
-    :type conn: :class:`httplib.HTTPResponse`
-    """
-    # FIXME: Can we do this somehow without accessing private httplib _method?
-    method = response._method
-    if isinstance(method, int):  # Platform-specific: Appengine
-        return method == 3
-    return method.upper() == "HEAD"
diff --git a/venv/lib/python3.7/site-packages/urllib3/util/retry.py b/venv/lib/python3.7/site-packages/urllib3/util/retry.py
deleted file mode 100644
index 5a049fe..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/util/retry.py
+++ /dev/null
@@ -1,450 +0,0 @@
-from __future__ import absolute_import
-import time
-import logging
-from collections import namedtuple
-from itertools import takewhile
-import email
-import re
-
-from ..exceptions import (
-    ConnectTimeoutError,
-    MaxRetryError,
-    ProtocolError,
-    ReadTimeoutError,
-    ResponseError,
-    InvalidHeader,
-)
-from ..packages import six
-
-
-log = logging.getLogger(__name__)
-
-
-# Data structure for representing the metadata of requests that result in a retry.
-RequestHistory = namedtuple(
-    "RequestHistory", ["method", "url", "error", "status", "redirect_location"]
-)
-
-
-class Retry(object):
-    """ Retry configuration.
-
-    Each retry attempt will create a new Retry object with updated values, so
-    they can be safely reused.
-
-    Retries can be defined as a default for a pool::
-
-        retries = Retry(connect=5, read=2, redirect=5)
-        http = PoolManager(retries=retries)
-        response = http.request('GET', 'http://example.com/')
-
-    Or per-request (which overrides the default for the pool)::
-
-        response = http.request('GET', 'http://example.com/', retries=Retry(10))
-
-    Retries can be disabled by passing ``False``::
-
-        response = http.request('GET', 'http://example.com/', retries=False)
-
-    Errors will be wrapped in :class:`~urllib3.exceptions.MaxRetryError` unless
-    retries are disabled, in which case the causing exception will be raised.
-
-    :param int total:
-        Total number of retries to allow. Takes precedence over other counts.
-
-        Set to ``None`` to remove this constraint and fall back on other
-        counts. It's a good idea to set this to some sensibly-high value to
-        account for unexpected edge cases and avoid infinite retry loops.
-
-        Set to ``0`` to fail on the first retry.
-
-        Set to ``False`` to disable and imply ``raise_on_redirect=False``.
-
-    :param int connect:
-        How many connection-related errors to retry on.
-
-        These are errors raised before the request is sent to the remote server,
-        which we assume has not triggered the server to process the request.
-
-        Set to ``0`` to fail on the first retry of this type.
-
-    :param int read:
-        How many times to retry on read errors.
-
-        These errors are raised after the request was sent to the server, so the
-        request may have side-effects.
-
-        Set to ``0`` to fail on the first retry of this type.
-
-    :param int redirect:
-        How many redirects to perform. Limit this to avoid infinite redirect
-        loops.
-
-        A redirect is a HTTP response with a status code 301, 302, 303, 307 or
-        308.
-
-        Set to ``0`` to fail on the first retry of this type.
-
-        Set to ``False`` to disable and imply ``raise_on_redirect=False``.
-
-    :param int status:
-        How many times to retry on bad status codes.
-
-        These are retries made on responses, where status code matches
-        ``status_forcelist``.
-
-        Set to ``0`` to fail on the first retry of this type.
-
-    :param iterable method_whitelist:
-        Set of uppercased HTTP method verbs that we should retry on.
-
-        By default, we only retry on methods which are considered to be
-        idempotent (multiple requests with the same parameters end with the
-        same state). See :attr:`Retry.DEFAULT_METHOD_WHITELIST`.
-
-        Set to a ``False`` value to retry on any verb.
-
-    :param iterable status_forcelist:
-        A set of integer HTTP status codes that we should force a retry on.
-        A retry is initiated if the request method is in ``method_whitelist``
-        and the response status code is in ``status_forcelist``.
-
-        By default, this is disabled with ``None``.
-
-    :param float backoff_factor:
-        A backoff factor to apply between attempts after the second try
-        (most errors are resolved immediately by a second try without a
-        delay). urllib3 will sleep for::
-
-            {backoff factor} * (2 ** ({number of total retries} - 1))
-
-        seconds. If the backoff_factor is 0.1, then :func:`.sleep` will sleep
-        for [0.0s, 0.2s, 0.4s, ...] between retries. It will never be longer
-        than :attr:`Retry.BACKOFF_MAX`.
-
-        By default, backoff is disabled (set to 0).
-
-    :param bool raise_on_redirect: Whether, if the number of redirects is
-        exhausted, to raise a MaxRetryError, or to return a response with a
-        response code in the 3xx range.
-
-    :param bool raise_on_status: Similar meaning to ``raise_on_redirect``:
-        whether we should raise an exception, or return a response,
-        if status falls in ``status_forcelist`` range and retries have
-        been exhausted.
-
-    :param tuple history: The history of the request encountered during
-        each call to :meth:`~Retry.increment`. The list is in the order
-        the requests occurred. Each list item is of class :class:`RequestHistory`.
-
-    :param bool respect_retry_after_header:
-        Whether to respect Retry-After header on status codes defined as
-        :attr:`Retry.RETRY_AFTER_STATUS_CODES` or not.
-
-    :param iterable remove_headers_on_redirect:
-        Sequence of headers to remove from the request when a response
-        indicating a redirect is returned before firing off the redirected
-        request.
-    """
-
-    DEFAULT_METHOD_WHITELIST = frozenset(
-        ["HEAD", "GET", "PUT", "DELETE", "OPTIONS", "TRACE"]
-    )
-
-    RETRY_AFTER_STATUS_CODES = frozenset([413, 429, 503])
-
-    DEFAULT_REDIRECT_HEADERS_BLACKLIST = frozenset(["Authorization"])
-
-    #: Maximum backoff time.
-    BACKOFF_MAX = 120
-
-    def __init__(
-        self,
-        total=10,
-        connect=None,
-        read=None,
-        redirect=None,
-        status=None,
-        method_whitelist=DEFAULT_METHOD_WHITELIST,
-        status_forcelist=None,
-        backoff_factor=0,
-        raise_on_redirect=True,
-        raise_on_status=True,
-        history=None,
-        respect_retry_after_header=True,
-        remove_headers_on_redirect=DEFAULT_REDIRECT_HEADERS_BLACKLIST,
-    ):
-
-        self.total = total
-        self.connect = connect
-        self.read = read
-        self.status = status
-
-        if redirect is False or total is False:
-            redirect = 0
-            raise_on_redirect = False
-
-        self.redirect = redirect
-        self.status_forcelist = status_forcelist or set()
-        self.method_whitelist = method_whitelist
-        self.backoff_factor = backoff_factor
-        self.raise_on_redirect = raise_on_redirect
-        self.raise_on_status = raise_on_status
-        self.history = history or tuple()
-        self.respect_retry_after_header = respect_retry_after_header
-        self.remove_headers_on_redirect = frozenset(
-            [h.lower() for h in remove_headers_on_redirect]
-        )
-
-    def new(self, **kw):
-        params = dict(
-            total=self.total,
-            connect=self.connect,
-            read=self.read,
-            redirect=self.redirect,
-            status=self.status,
-            method_whitelist=self.method_whitelist,
-            status_forcelist=self.status_forcelist,
-            backoff_factor=self.backoff_factor,
-            raise_on_redirect=self.raise_on_redirect,
-            raise_on_status=self.raise_on_status,
-            history=self.history,
-            remove_headers_on_redirect=self.remove_headers_on_redirect,
-            respect_retry_after_header=self.respect_retry_after_header,
-        )
-        params.update(kw)
-        return type(self)(**params)
-
-    @classmethod
-    def from_int(cls, retries, redirect=True, default=None):
-        """ Backwards-compatibility for the old retries format."""
-        if retries is None:
-            retries = default if default is not None else cls.DEFAULT
-
-        if isinstance(retries, Retry):
-            return retries
-
-        redirect = bool(redirect) and None
-        new_retries = cls(retries, redirect=redirect)
-        log.debug("Converted retries value: %r -> %r", retries, new_retries)
-        return new_retries
-
-    def get_backoff_time(self):
-        """ Formula for computing the current backoff
-
-        :rtype: float
-        """
-        # We want to consider only the last consecutive errors sequence (Ignore redirects).
-        consecutive_errors_len = len(
-            list(
-                takewhile(lambda x: x.redirect_location is None, reversed(self.history))
-            )
-        )
-        if consecutive_errors_len <= 1:
-            return 0
-
-        backoff_value = self.backoff_factor * (2 ** (consecutive_errors_len - 1))
-        return min(self.BACKOFF_MAX, backoff_value)
-
-    def parse_retry_after(self, retry_after):
-        # Whitespace: https://tools.ietf.org/html/rfc7230#section-3.2.4
-        if re.match(r"^\s*[0-9]+\s*$", retry_after):
-            seconds = int(retry_after)
-        else:
-            retry_date_tuple = email.utils.parsedate(retry_after)
-            if retry_date_tuple is None:
-                raise InvalidHeader("Invalid Retry-After header: %s" % retry_after)
-            retry_date = time.mktime(retry_date_tuple)
-            seconds = retry_date - time.time()
-
-        if seconds < 0:
-            seconds = 0
-
-        return seconds
-
-    def get_retry_after(self, response):
-        """ Get the value of Retry-After in seconds. """
-
-        retry_after = response.getheader("Retry-After")
-
-        if retry_after is None:
-            return None
-
-        return self.parse_retry_after(retry_after)
-
-    def sleep_for_retry(self, response=None):
-        retry_after = self.get_retry_after(response)
-        if retry_after:
-            time.sleep(retry_after)
-            return True
-
-        return False
-
-    def _sleep_backoff(self):
-        backoff = self.get_backoff_time()
-        if backoff <= 0:
-            return
-        time.sleep(backoff)
-
-    def sleep(self, response=None):
-        """ Sleep between retry attempts.
-
-        This method will respect a server's ``Retry-After`` response header
-        and sleep the duration of the time requested. If that is not present, it
-        will use an exponential backoff. By default, the backoff factor is 0 and
-        this method will return immediately.
-        """
-
-        if self.respect_retry_after_header and response:
-            slept = self.sleep_for_retry(response)
-            if slept:
-                return
-
-        self._sleep_backoff()
-
-    def _is_connection_error(self, err):
-        """ Errors when we're fairly sure that the server did not receive the
-        request, so it should be safe to retry.
-        """
-        return isinstance(err, ConnectTimeoutError)
-
-    def _is_read_error(self, err):
-        """ Errors that occur after the request has been started, so we should
-        assume that the server began processing it.
-        """
-        return isinstance(err, (ReadTimeoutError, ProtocolError))
-
-    def _is_method_retryable(self, method):
-        """ Checks if a given HTTP method should be retried upon, depending if
-        it is included on the method whitelist.
-        """
-        if self.method_whitelist and method.upper() not in self.method_whitelist:
-            return False
-
-        return True
-
-    def is_retry(self, method, status_code, has_retry_after=False):
-        """ Is this method/status code retryable? (Based on whitelists and control
-        variables such as the number of total retries to allow, whether to
-        respect the Retry-After header, whether this header is present, and
-        whether the returned status code is on the list of status codes to
-        be retried upon on the presence of the aforementioned header)
-        """
-        if not self._is_method_retryable(method):
-            return False
-
-        if self.status_forcelist and status_code in self.status_forcelist:
-            return True
-
-        return (
-            self.total
-            and self.respect_retry_after_header
-            and has_retry_after
-            and (status_code in self.RETRY_AFTER_STATUS_CODES)
-        )
-
-    def is_exhausted(self):
-        """ Are we out of retries? """
-        retry_counts = (self.total, self.connect, self.read, self.redirect, self.status)
-        retry_counts = list(filter(None, retry_counts))
-        if not retry_counts:
-            return False
-
-        return min(retry_counts) < 0
-
-    def increment(
-        self,
-        method=None,
-        url=None,
-        response=None,
-        error=None,
-        _pool=None,
-        _stacktrace=None,
-    ):
-        """ Return a new Retry object with incremented retry counters.
-
-        :param response: A response object, or None, if the server did not
-            return a response.
-        :type response: :class:`~urllib3.response.HTTPResponse`
-        :param Exception error: An error encountered during the request, or
-            None if the response was received successfully.
-
-        :return: A new ``Retry`` object.
-        """
-        if self.total is False and error:
-            # Disabled, indicate to re-raise the error.
-            raise six.reraise(type(error), error, _stacktrace)
-
-        total = self.total
-        if total is not None:
-            total -= 1
-
-        connect = self.connect
-        read = self.read
-        redirect = self.redirect
-        status_count = self.status
-        cause = "unknown"
-        status = None
-        redirect_location = None
-
-        if error and self._is_connection_error(error):
-            # Connect retry?
-            if connect is False:
-                raise six.reraise(type(error), error, _stacktrace)
-            elif connect is not None:
-                connect -= 1
-
-        elif error and self._is_read_error(error):
-            # Read retry?
-            if read is False or not self._is_method_retryable(method):
-                raise six.reraise(type(error), error, _stacktrace)
-            elif read is not None:
-                read -= 1
-
-        elif response and response.get_redirect_location():
-            # Redirect retry?
-            if redirect is not None:
-                redirect -= 1
-            cause = "too many redirects"
-            redirect_location = response.get_redirect_location()
-            status = response.status
-
-        else:
-            # Incrementing because of a server error like a 500 in
-            # status_forcelist and a the given method is in the whitelist
-            cause = ResponseError.GENERIC_ERROR
-            if response and response.status:
-                if status_count is not None:
-                    status_count -= 1
-                cause = ResponseError.SPECIFIC_ERROR.format(status_code=response.status)
-                status = response.status
-
-        history = self.history + (
-            RequestHistory(method, url, error, status, redirect_location),
-        )
-
-        new_retry = self.new(
-            total=total,
-            connect=connect,
-            read=read,
-            redirect=redirect,
-            status=status_count,
-            history=history,
-        )
-
-        if new_retry.is_exhausted():
-            raise MaxRetryError(_pool, url, error or ResponseError(cause))
-
-        log.debug("Incremented Retry for (url='%s'): %r", url, new_retry)
-
-        return new_retry
-
-    def __repr__(self):
-        return (
-            "{cls.__name__}(total={self.total}, connect={self.connect}, "
-            "read={self.read}, redirect={self.redirect}, status={self.status})"
-        ).format(cls=type(self), self=self)
-
-
-# For backwards compatibility (equivalent to pre-v1.9):
-Retry.DEFAULT = Retry(3)
diff --git a/venv/lib/python3.7/site-packages/urllib3/util/ssl_.py b/venv/lib/python3.7/site-packages/urllib3/util/ssl_.py
deleted file mode 100644
index 8495b77..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/util/ssl_.py
+++ /dev/null
@@ -1,407 +0,0 @@
-from __future__ import absolute_import
-import errno
-import warnings
-import hmac
-import sys
-
-from binascii import hexlify, unhexlify
-from hashlib import md5, sha1, sha256
-
-from .url import IPV4_RE, BRACELESS_IPV6_ADDRZ_RE
-from ..exceptions import SSLError, InsecurePlatformWarning, SNIMissingWarning
-from ..packages import six
-
-
-SSLContext = None
-HAS_SNI = False
-IS_PYOPENSSL = False
-IS_SECURETRANSPORT = False
-
-# Maps the length of a digest to a possible hash function producing this digest
-HASHFUNC_MAP = {32: md5, 40: sha1, 64: sha256}
-
-
-def _const_compare_digest_backport(a, b):
-    """
-    Compare two digests of equal length in constant time.
-
-    The digests must be of type str/bytes.
-    Returns True if the digests match, and False otherwise.
-    """
-    result = abs(len(a) - len(b))
-    for l, r in zip(bytearray(a), bytearray(b)):
-        result |= l ^ r
-    return result == 0
-
-
-_const_compare_digest = getattr(hmac, "compare_digest", _const_compare_digest_backport)
-
-try:  # Test for SSL features
-    import ssl
-    from ssl import wrap_socket, CERT_REQUIRED
-    from ssl import HAS_SNI  # Has SNI?
-except ImportError:
-    pass
-
-try:  # Platform-specific: Python 3.6
-    from ssl import PROTOCOL_TLS
-
-    PROTOCOL_SSLv23 = PROTOCOL_TLS
-except ImportError:
-    try:
-        from ssl import PROTOCOL_SSLv23 as PROTOCOL_TLS
-
-        PROTOCOL_SSLv23 = PROTOCOL_TLS
-    except ImportError:
-        PROTOCOL_SSLv23 = PROTOCOL_TLS = 2
-
-
-try:
-    from ssl import OP_NO_SSLv2, OP_NO_SSLv3, OP_NO_COMPRESSION
-except ImportError:
-    OP_NO_SSLv2, OP_NO_SSLv3 = 0x1000000, 0x2000000
-    OP_NO_COMPRESSION = 0x20000
-
-
-# A secure default.
-# Sources for more information on TLS ciphers:
-#
-# - https://wiki.mozilla.org/Security/Server_Side_TLS
-# - https://www.ssllabs.com/projects/best-practices/index.html
-# - https://hynek.me/articles/hardening-your-web-servers-ssl-ciphers/
-#
-# The general intent is:
-# - prefer cipher suites that offer perfect forward secrecy (DHE/ECDHE),
-# - prefer ECDHE over DHE for better performance,
-# - prefer any AES-GCM and ChaCha20 over any AES-CBC for better performance and
-#   security,
-# - prefer AES-GCM over ChaCha20 because hardware-accelerated AES is common,
-# - disable NULL authentication, MD5 MACs, DSS, and other
-#   insecure ciphers for security reasons.
-# - NOTE: TLS 1.3 cipher suites are managed through a different interface
-#   not exposed by CPython (yet!) and are enabled by default if they're available.
-DEFAULT_CIPHERS = ":".join(
-    [
-        "ECDHE+AESGCM",
-        "ECDHE+CHACHA20",
-        "DHE+AESGCM",
-        "DHE+CHACHA20",
-        "ECDH+AESGCM",
-        "DH+AESGCM",
-        "ECDH+AES",
-        "DH+AES",
-        "RSA+AESGCM",
-        "RSA+AES",
-        "!aNULL",
-        "!eNULL",
-        "!MD5",
-        "!DSS",
-    ]
-)
-
-try:
-    from ssl import SSLContext  # Modern SSL?
-except ImportError:
-
-    class SSLContext(object):  # Platform-specific: Python 2
-        def __init__(self, protocol_version):
-            self.protocol = protocol_version
-            # Use default values from a real SSLContext
-            self.check_hostname = False
-            self.verify_mode = ssl.CERT_NONE
-            self.ca_certs = None
-            self.options = 0
-            self.certfile = None
-            self.keyfile = None
-            self.ciphers = None
-
-        def load_cert_chain(self, certfile, keyfile):
-            self.certfile = certfile
-            self.keyfile = keyfile
-
-        def load_verify_locations(self, cafile=None, capath=None):
-            self.ca_certs = cafile
-
-            if capath is not None:
-                raise SSLError("CA directories not supported in older Pythons")
-
-        def set_ciphers(self, cipher_suite):
-            self.ciphers = cipher_suite
-
-        def wrap_socket(self, socket, server_hostname=None, server_side=False):
-            warnings.warn(
-                "A true SSLContext object is not available. This prevents "
-                "urllib3 from configuring SSL appropriately and may cause "
-                "certain SSL connections to fail. You can upgrade to a newer "
-                "version of Python to solve this. For more information, see "
-                "https://urllib3.readthedocs.io/en/latest/advanced-usage.html"
-                "#ssl-warnings",
-                InsecurePlatformWarning,
-            )
-            kwargs = {
-                "keyfile": self.keyfile,
-                "certfile": self.certfile,
-                "ca_certs": self.ca_certs,
-                "cert_reqs": self.verify_mode,
-                "ssl_version": self.protocol,
-                "server_side": server_side,
-            }
-            return wrap_socket(socket, ciphers=self.ciphers, **kwargs)
-
-
-def assert_fingerprint(cert, fingerprint):
-    """
-    Checks if given fingerprint matches the supplied certificate.
-
-    :param cert:
-        Certificate as bytes object.
-    :param fingerprint:
-        Fingerprint as string of hexdigits, can be interspersed by colons.
-    """
-
-    fingerprint = fingerprint.replace(":", "").lower()
-    digest_length = len(fingerprint)
-    hashfunc = HASHFUNC_MAP.get(digest_length)
-    if not hashfunc:
-        raise SSLError("Fingerprint of invalid length: {0}".format(fingerprint))
-
-    # We need encode() here for py32; works on py2 and p33.
-    fingerprint_bytes = unhexlify(fingerprint.encode())
-
-    cert_digest = hashfunc(cert).digest()
-
-    if not _const_compare_digest(cert_digest, fingerprint_bytes):
-        raise SSLError(
-            'Fingerprints did not match. Expected "{0}", got "{1}".'.format(
-                fingerprint, hexlify(cert_digest)
-            )
-        )
-
-
-def resolve_cert_reqs(candidate):
-    """
-    Resolves the argument to a numeric constant, which can be passed to
-    the wrap_socket function/method from the ssl module.
-    Defaults to :data:`ssl.CERT_NONE`.
-    If given a string it is assumed to be the name of the constant in the
-    :mod:`ssl` module or its abbreviation.
-    (So you can specify `REQUIRED` instead of `CERT_REQUIRED`.
-    If it's neither `None` nor a string we assume it is already the numeric
-    constant which can directly be passed to wrap_socket.
-    """
-    if candidate is None:
-        return CERT_REQUIRED
-
-    if isinstance(candidate, str):
-        res = getattr(ssl, candidate, None)
-        if res is None:
-            res = getattr(ssl, "CERT_" + candidate)
-        return res
-
-    return candidate
-
-
-def resolve_ssl_version(candidate):
-    """
-    like resolve_cert_reqs
-    """
-    if candidate is None:
-        return PROTOCOL_TLS
-
-    if isinstance(candidate, str):
-        res = getattr(ssl, candidate, None)
-        if res is None:
-            res = getattr(ssl, "PROTOCOL_" + candidate)
-        return res
-
-    return candidate
-
-
-def create_urllib3_context(
-    ssl_version=None, cert_reqs=None, options=None, ciphers=None
-):
-    """All arguments have the same meaning as ``ssl_wrap_socket``.
-
-    By default, this function does a lot of the same work that
-    ``ssl.create_default_context`` does on Python 3.4+. It:
-
-    - Disables SSLv2, SSLv3, and compression
-    - Sets a restricted set of server ciphers
-
-    If you wish to enable SSLv3, you can do::
-
-        from urllib3.util import ssl_
-        context = ssl_.create_urllib3_context()
-        context.options &= ~ssl_.OP_NO_SSLv3
-
-    You can do the same to enable compression (substituting ``COMPRESSION``
-    for ``SSLv3`` in the last line above).
-
-    :param ssl_version:
-        The desired protocol version to use. This will default to
-        PROTOCOL_SSLv23 which will negotiate the highest protocol that both
-        the server and your installation of OpenSSL support.
-    :param cert_reqs:
-        Whether to require the certificate verification. This defaults to
-        ``ssl.CERT_REQUIRED``.
-    :param options:
-        Specific OpenSSL options. These default to ``ssl.OP_NO_SSLv2``,
-        ``ssl.OP_NO_SSLv3``, ``ssl.OP_NO_COMPRESSION``.
-    :param ciphers:
-        Which cipher suites to allow the server to select.
-    :returns:
-        Constructed SSLContext object with specified options
-    :rtype: SSLContext
-    """
-    context = SSLContext(ssl_version or PROTOCOL_TLS)
-
-    context.set_ciphers(ciphers or DEFAULT_CIPHERS)
-
-    # Setting the default here, as we may have no ssl module on import
-    cert_reqs = ssl.CERT_REQUIRED if cert_reqs is None else cert_reqs
-
-    if options is None:
-        options = 0
-        # SSLv2 is easily broken and is considered harmful and dangerous
-        options |= OP_NO_SSLv2
-        # SSLv3 has several problems and is now dangerous
-        options |= OP_NO_SSLv3
-        # Disable compression to prevent CRIME attacks for OpenSSL 1.0+
-        # (issue #309)
-        options |= OP_NO_COMPRESSION
-
-    context.options |= options
-
-    # Enable post-handshake authentication for TLS 1.3, see GH #1634. PHA is
-    # necessary for conditional client cert authentication with TLS 1.3.
-    # The attribute is None for OpenSSL <= 1.1.0 or does not exist in older
-    # versions of Python.  We only enable on Python 3.7.4+ or if certificate
-    # verification is enabled to work around Python issue #37428
-    # See: https://bugs.python.org/issue37428
-    if (cert_reqs == ssl.CERT_REQUIRED or sys.version_info >= (3, 7, 4)) and getattr(
-        context, "post_handshake_auth", None
-    ) is not None:
-        context.post_handshake_auth = True
-
-    context.verify_mode = cert_reqs
-    if (
-        getattr(context, "check_hostname", None) is not None
-    ):  # Platform-specific: Python 3.2
-        # We do our own verification, including fingerprints and alternative
-        # hostnames. So disable it here
-        context.check_hostname = False
-    return context
-
-
-def ssl_wrap_socket(
-    sock,
-    keyfile=None,
-    certfile=None,
-    cert_reqs=None,
-    ca_certs=None,
-    server_hostname=None,
-    ssl_version=None,
-    ciphers=None,
-    ssl_context=None,
-    ca_cert_dir=None,
-    key_password=None,
-):
-    """
-    All arguments except for server_hostname, ssl_context, and ca_cert_dir have
-    the same meaning as they do when using :func:`ssl.wrap_socket`.
-
-    :param server_hostname:
-        When SNI is supported, the expected hostname of the certificate
-    :param ssl_context:
-        A pre-made :class:`SSLContext` object. If none is provided, one will
-        be created using :func:`create_urllib3_context`.
-    :param ciphers:
-        A string of ciphers we wish the client to support.
-    :param ca_cert_dir:
-        A directory containing CA certificates in multiple separate files, as
-        supported by OpenSSL's -CApath flag or the capath argument to
-        SSLContext.load_verify_locations().
-    :param key_password:
-        Optional password if the keyfile is encrypted.
-    """
-    context = ssl_context
-    if context is None:
-        # Note: This branch of code and all the variables in it are no longer
-        # used by urllib3 itself. We should consider deprecating and removing
-        # this code.
-        context = create_urllib3_context(ssl_version, cert_reqs, ciphers=ciphers)
-
-    if ca_certs or ca_cert_dir:
-        try:
-            context.load_verify_locations(ca_certs, ca_cert_dir)
-        except IOError as e:  # Platform-specific: Python 2.7
-            raise SSLError(e)
-        # Py33 raises FileNotFoundError which subclasses OSError
-        # These are not equivalent unless we check the errno attribute
-        except OSError as e:  # Platform-specific: Python 3.3 and beyond
-            if e.errno == errno.ENOENT:
-                raise SSLError(e)
-            raise
-
-    elif ssl_context is None and hasattr(context, "load_default_certs"):
-        # try to load OS default certs; works well on Windows (require Python3.4+)
-        context.load_default_certs()
-
-    # Attempt to detect if we get the goofy behavior of the
-    # keyfile being encrypted and OpenSSL asking for the
-    # passphrase via the terminal and instead error out.
-    if keyfile and key_password is None and _is_key_file_encrypted(keyfile):
-        raise SSLError("Client private key is encrypted, password is required")
-
-    if certfile:
-        if key_password is None:
-            context.load_cert_chain(certfile, keyfile)
-        else:
-            context.load_cert_chain(certfile, keyfile, key_password)
-
-    # If we detect server_hostname is an IP address then the SNI
-    # extension should not be used according to RFC3546 Section 3.1
-    # We shouldn't warn the user if SNI isn't available but we would
-    # not be using SNI anyways due to IP address for server_hostname.
-    if (
-        server_hostname is not None and not is_ipaddress(server_hostname)
-    ) or IS_SECURETRANSPORT:
-        if HAS_SNI and server_hostname is not None:
-            return context.wrap_socket(sock, server_hostname=server_hostname)
-
-        warnings.warn(
-            "An HTTPS request has been made, but the SNI (Server Name "
-            "Indication) extension to TLS is not available on this platform. "
-            "This may cause the server to present an incorrect TLS "
-            "certificate, which can cause validation failures. You can upgrade to "
-            "a newer version of Python to solve this. For more information, see "
-            "https://urllib3.readthedocs.io/en/latest/advanced-usage.html"
-            "#ssl-warnings",
-            SNIMissingWarning,
-        )
-
-    return context.wrap_socket(sock)
-
-
-def is_ipaddress(hostname):
-    """Detects whether the hostname given is an IPv4 or IPv6 address.
-    Also detects IPv6 addresses with Zone IDs.
-
-    :param str hostname: Hostname to examine.
-    :return: True if the hostname is an IP address, False otherwise.
-    """
-    if not six.PY2 and isinstance(hostname, bytes):
-        # IDN A-label bytes are ASCII compatible.
-        hostname = hostname.decode("ascii")
-    return bool(IPV4_RE.match(hostname) or BRACELESS_IPV6_ADDRZ_RE.match(hostname))
-
-
-def _is_key_file_encrypted(key_file):
-    """Detects if a key file is encrypted or not."""
-    with open(key_file, "r") as f:
-        for line in f:
-            # Look for Proc-Type: 4,ENCRYPTED
-            if "ENCRYPTED" in line:
-                return True
-
-    return False
diff --git a/venv/lib/python3.7/site-packages/urllib3/util/timeout.py b/venv/lib/python3.7/site-packages/urllib3/util/timeout.py
deleted file mode 100644
index 9883700..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/util/timeout.py
+++ /dev/null
@@ -1,258 +0,0 @@
-from __future__ import absolute_import
-
-# The default socket timeout, used by httplib to indicate that no timeout was
-# specified by the user
-from socket import _GLOBAL_DEFAULT_TIMEOUT
-import time
-
-from ..exceptions import TimeoutStateError
-
-# A sentinel value to indicate that no timeout was specified by the user in
-# urllib3
-_Default = object()
-
-
-# Use time.monotonic if available.
-current_time = getattr(time, "monotonic", time.time)
-
-
-class Timeout(object):
-    """ Timeout configuration.
-
-    Timeouts can be defined as a default for a pool::
-
-        timeout = Timeout(connect=2.0, read=7.0)
-        http = PoolManager(timeout=timeout)
-        response = http.request('GET', 'http://example.com/')
-
-    Or per-request (which overrides the default for the pool)::
-
-        response = http.request('GET', 'http://example.com/', timeout=Timeout(10))
-
-    Timeouts can be disabled by setting all the parameters to ``None``::
-
-        no_timeout = Timeout(connect=None, read=None)
-        response = http.request('GET', 'http://example.com/, timeout=no_timeout)
-
-
-    :param total:
-        This combines the connect and read timeouts into one; the read timeout
-        will be set to the time leftover from the connect attempt. In the
-        event that both a connect timeout and a total are specified, or a read
-        timeout and a total are specified, the shorter timeout will be applied.
-
-        Defaults to None.
-
-    :type total: integer, float, or None
-
-    :param connect:
-        The maximum amount of time (in seconds) to wait for a connection
-        attempt to a server to succeed. Omitting the parameter will default the
-        connect timeout to the system default, probably `the global default
-        timeout in socket.py
-        <http://hg.python.org/cpython/file/603b4d593758/Lib/socket.py#l535>`_.
-        None will set an infinite timeout for connection attempts.
-
-    :type connect: integer, float, or None
-
-    :param read:
-        The maximum amount of time (in seconds) to wait between consecutive
-        read operations for a response from the server. Omitting the parameter
-        will default the read timeout to the system default, probably `the
-        global default timeout in socket.py
-        <http://hg.python.org/cpython/file/603b4d593758/Lib/socket.py#l535>`_.
-        None will set an infinite timeout.
-
-    :type read: integer, float, or None
-
-    .. note::
-
-        Many factors can affect the total amount of time for urllib3 to return
-        an HTTP response.
-
-        For example, Python's DNS resolver does not obey the timeout specified
-        on the socket. Other factors that can affect total request time include
-        high CPU load, high swap, the program running at a low priority level,
-        or other behaviors.
-
-        In addition, the read and total timeouts only measure the time between
-        read operations on the socket connecting the client and the server,
-        not the total amount of time for the request to return a complete
-        response. For most requests, the timeout is raised because the server
-        has not sent the first byte in the specified time. This is not always
-        the case; if a server streams one byte every fifteen seconds, a timeout
-        of 20 seconds will not trigger, even though the request will take
-        several minutes to complete.
-
-        If your goal is to cut off any request after a set amount of wall clock
-        time, consider having a second "watcher" thread to cut off a slow
-        request.
-    """
-
-    #: A sentinel object representing the default timeout value
-    DEFAULT_TIMEOUT = _GLOBAL_DEFAULT_TIMEOUT
-
-    def __init__(self, total=None, connect=_Default, read=_Default):
-        self._connect = self._validate_timeout(connect, "connect")
-        self._read = self._validate_timeout(read, "read")
-        self.total = self._validate_timeout(total, "total")
-        self._start_connect = None
-
-    def __str__(self):
-        return "%s(connect=%r, read=%r, total=%r)" % (
-            type(self).__name__,
-            self._connect,
-            self._read,
-            self.total,
-        )
-
-    @classmethod
-    def _validate_timeout(cls, value, name):
-        """ Check that a timeout attribute is valid.
-
-        :param value: The timeout value to validate
-        :param name: The name of the timeout attribute to validate. This is
-            used to specify in error messages.
-        :return: The validated and casted version of the given value.
-        :raises ValueError: If it is a numeric value less than or equal to
-            zero, or the type is not an integer, float, or None.
-        """
-        if value is _Default:
-            return cls.DEFAULT_TIMEOUT
-
-        if value is None or value is cls.DEFAULT_TIMEOUT:
-            return value
-
-        if isinstance(value, bool):
-            raise ValueError(
-                "Timeout cannot be a boolean value. It must "
-                "be an int, float or None."
-            )
-        try:
-            float(value)
-        except (TypeError, ValueError):
-            raise ValueError(
-                "Timeout value %s was %s, but it must be an "
-                "int, float or None." % (name, value)
-            )
-
-        try:
-            if value <= 0:
-                raise ValueError(
-                    "Attempted to set %s timeout to %s, but the "
-                    "timeout cannot be set to a value less "
-                    "than or equal to 0." % (name, value)
-                )
-        except TypeError:
-            # Python 3
-            raise ValueError(
-                "Timeout value %s was %s, but it must be an "
-                "int, float or None." % (name, value)
-            )
-
-        return value
-
-    @classmethod
-    def from_float(cls, timeout):
-        """ Create a new Timeout from a legacy timeout value.
-
-        The timeout value used by httplib.py sets the same timeout on the
-        connect(), and recv() socket requests. This creates a :class:`Timeout`
-        object that sets the individual timeouts to the ``timeout`` value
-        passed to this function.
-
-        :param timeout: The legacy timeout value.
-        :type timeout: integer, float, sentinel default object, or None
-        :return: Timeout object
-        :rtype: :class:`Timeout`
-        """
-        return Timeout(read=timeout, connect=timeout)
-
-    def clone(self):
-        """ Create a copy of the timeout object
-
-        Timeout properties are stored per-pool but each request needs a fresh
-        Timeout object to ensure each one has its own start/stop configured.
-
-        :return: a copy of the timeout object
-        :rtype: :class:`Timeout`
-        """
-        # We can't use copy.deepcopy because that will also create a new object
-        # for _GLOBAL_DEFAULT_TIMEOUT, which socket.py uses as a sentinel to
-        # detect the user default.
-        return Timeout(connect=self._connect, read=self._read, total=self.total)
-
-    def start_connect(self):
-        """ Start the timeout clock, used during a connect() attempt
-
-        :raises urllib3.exceptions.TimeoutStateError: if you attempt
-            to start a timer that has been started already.
-        """
-        if self._start_connect is not None:
-            raise TimeoutStateError("Timeout timer has already been started.")
-        self._start_connect = current_time()
-        return self._start_connect
-
-    def get_connect_duration(self):
-        """ Gets the time elapsed since the call to :meth:`start_connect`.
-
-        :return: Elapsed time in seconds.
-        :rtype: float
-        :raises urllib3.exceptions.TimeoutStateError: if you attempt
-            to get duration for a timer that hasn't been started.
-        """
-        if self._start_connect is None:
-            raise TimeoutStateError(
-                "Can't get connect duration for timer that has not started."
-            )
-        return current_time() - self._start_connect
-
-    @property
-    def connect_timeout(self):
-        """ Get the value to use when setting a connection timeout.
-
-        This will be a positive float or integer, the value None
-        (never timeout), or the default system timeout.
-
-        :return: Connect timeout.
-        :rtype: int, float, :attr:`Timeout.DEFAULT_TIMEOUT` or None
-        """
-        if self.total is None:
-            return self._connect
-
-        if self._connect is None or self._connect is self.DEFAULT_TIMEOUT:
-            return self.total
-
-        return min(self._connect, self.total)
-
-    @property
-    def read_timeout(self):
-        """ Get the value for the read timeout.
-
-        This assumes some time has elapsed in the connection timeout and
-        computes the read timeout appropriately.
-
-        If self.total is set, the read timeout is dependent on the amount of
-        time taken by the connect timeout. If the connection time has not been
-        established, a :exc:`~urllib3.exceptions.TimeoutStateError` will be
-        raised.
-
-        :return: Value to use for the read timeout.
-        :rtype: int, float, :attr:`Timeout.DEFAULT_TIMEOUT` or None
-        :raises urllib3.exceptions.TimeoutStateError: If :meth:`start_connect`
-            has not yet been called on this object.
-        """
-        if (
-            self.total is not None
-            and self.total is not self.DEFAULT_TIMEOUT
-            and self._read is not None
-            and self._read is not self.DEFAULT_TIMEOUT
-        ):
-            # In case the connect timeout has not yet been established.
-            if self._start_connect is None:
-                return self._read
-            return max(0, min(self.total - self.get_connect_duration(), self._read))
-        elif self.total is not None and self.total is not self.DEFAULT_TIMEOUT:
-            return max(0, self.total - self.get_connect_duration())
-        else:
-            return self._read
diff --git a/venv/lib/python3.7/site-packages/urllib3/util/url.py b/venv/lib/python3.7/site-packages/urllib3/util/url.py
deleted file mode 100644
index f7568e9..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/util/url.py
+++ /dev/null
@@ -1,436 +0,0 @@
-from __future__ import absolute_import
-import re
-from collections import namedtuple
-
-from ..exceptions import LocationParseError
-from ..packages import six
-
-
-url_attrs = ["scheme", "auth", "host", "port", "path", "query", "fragment"]
-
-# We only want to normalize urls with an HTTP(S) scheme.
-# urllib3 infers URLs without a scheme (None) to be http.
-NORMALIZABLE_SCHEMES = ("http", "https", None)
-
-# Almost all of these patterns were derived from the
-# 'rfc3986' module: https://github.com/python-hyper/rfc3986
-PERCENT_RE = re.compile(r"%[a-fA-F0-9]{2}")
-SCHEME_RE = re.compile(r"^(?:[a-zA-Z][a-zA-Z0-9+-]*:|/)")
-URI_RE = re.compile(
-    r"^(?:([a-zA-Z][a-zA-Z0-9+.-]*):)?"
-    r"(?://([^/?#]*))?"
-    r"([^?#]*)"
-    r"(?:\?([^#]*))?"
-    r"(?:#(.*))?$",
-    re.UNICODE | re.DOTALL,
-)
-
-IPV4_PAT = r"(?:[0-9]{1,3}\.){3}[0-9]{1,3}"
-HEX_PAT = "[0-9A-Fa-f]{1,4}"
-LS32_PAT = "(?:{hex}:{hex}|{ipv4})".format(hex=HEX_PAT, ipv4=IPV4_PAT)
-_subs = {"hex": HEX_PAT, "ls32": LS32_PAT}
-_variations = [
-    #                            6( h16 ":" ) ls32
-    "(?:%(hex)s:){6}%(ls32)s",
-    #                       "::" 5( h16 ":" ) ls32
-    "::(?:%(hex)s:){5}%(ls32)s",
-    # [               h16 ] "::" 4( h16 ":" ) ls32
-    "(?:%(hex)s)?::(?:%(hex)s:){4}%(ls32)s",
-    # [ *1( h16 ":" ) h16 ] "::" 3( h16 ":" ) ls32
-    "(?:(?:%(hex)s:)?%(hex)s)?::(?:%(hex)s:){3}%(ls32)s",
-    # [ *2( h16 ":" ) h16 ] "::" 2( h16 ":" ) ls32
-    "(?:(?:%(hex)s:){0,2}%(hex)s)?::(?:%(hex)s:){2}%(ls32)s",
-    # [ *3( h16 ":" ) h16 ] "::"    h16 ":"   ls32
-    "(?:(?:%(hex)s:){0,3}%(hex)s)?::%(hex)s:%(ls32)s",
-    # [ *4( h16 ":" ) h16 ] "::"              ls32
-    "(?:(?:%(hex)s:){0,4}%(hex)s)?::%(ls32)s",
-    # [ *5( h16 ":" ) h16 ] "::"              h16
-    "(?:(?:%(hex)s:){0,5}%(hex)s)?::%(hex)s",
-    # [ *6( h16 ":" ) h16 ] "::"
-    "(?:(?:%(hex)s:){0,6}%(hex)s)?::",
-]
-
-UNRESERVED_PAT = r"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789._!\-~"
-IPV6_PAT = "(?:" + "|".join([x % _subs for x in _variations]) + ")"
-ZONE_ID_PAT = "(?:%25|%)(?:[" + UNRESERVED_PAT + "]|%[a-fA-F0-9]{2})+"
-IPV6_ADDRZ_PAT = r"\[" + IPV6_PAT + r"(?:" + ZONE_ID_PAT + r")?\]"
-REG_NAME_PAT = r"(?:[^\[\]%:/?#]|%[a-fA-F0-9]{2})*"
-TARGET_RE = re.compile(r"^(/[^?#]*)(?:\?([^#]*))?(?:#.*)?$")
-
-IPV4_RE = re.compile("^" + IPV4_PAT + "$")
-IPV6_RE = re.compile("^" + IPV6_PAT + "$")
-IPV6_ADDRZ_RE = re.compile("^" + IPV6_ADDRZ_PAT + "$")
-BRACELESS_IPV6_ADDRZ_RE = re.compile("^" + IPV6_ADDRZ_PAT[2:-2] + "$")
-ZONE_ID_RE = re.compile("(" + ZONE_ID_PAT + r")\]$")
-
-SUBAUTHORITY_PAT = (u"^(?:(.*)@)?(%s|%s|%s)(?::([0-9]{0,5}))?$") % (
-    REG_NAME_PAT,
-    IPV4_PAT,
-    IPV6_ADDRZ_PAT,
-)
-SUBAUTHORITY_RE = re.compile(SUBAUTHORITY_PAT, re.UNICODE | re.DOTALL)
-
-UNRESERVED_CHARS = set(
-    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789._-~"
-)
-SUB_DELIM_CHARS = set("!$&'()*+,;=")
-USERINFO_CHARS = UNRESERVED_CHARS | SUB_DELIM_CHARS | {":"}
-PATH_CHARS = USERINFO_CHARS | {"@", "/"}
-QUERY_CHARS = FRAGMENT_CHARS = PATH_CHARS | {"?"}
-
-
-class Url(namedtuple("Url", url_attrs)):
-    """
-    Data structure for representing an HTTP URL. Used as a return value for
-    :func:`parse_url`. Both the scheme and host are normalized as they are
-    both case-insensitive according to RFC 3986.
-    """
-
-    __slots__ = ()
-
-    def __new__(
-        cls,
-        scheme=None,
-        auth=None,
-        host=None,
-        port=None,
-        path=None,
-        query=None,
-        fragment=None,
-    ):
-        if path and not path.startswith("/"):
-            path = "/" + path
-        if scheme is not None:
-            scheme = scheme.lower()
-        return super(Url, cls).__new__(
-            cls, scheme, auth, host, port, path, query, fragment
-        )
-
-    @property
-    def hostname(self):
-        """For backwards-compatibility with urlparse. We're nice like that."""
-        return self.host
-
-    @property
-    def request_uri(self):
-        """Absolute path including the query string."""
-        uri = self.path or "/"
-
-        if self.query is not None:
-            uri += "?" + self.query
-
-        return uri
-
-    @property
-    def netloc(self):
-        """Network location including host and port"""
-        if self.port:
-            return "%s:%d" % (self.host, self.port)
-        return self.host
-
-    @property
-    def url(self):
-        """
-        Convert self into a url
-
-        This function should more or less round-trip with :func:`.parse_url`. The
-        returned url may not be exactly the same as the url inputted to
-        :func:`.parse_url`, but it should be equivalent by the RFC (e.g., urls
-        with a blank port will have : removed).
-
-        Example: ::
-
-            >>> U = parse_url('http://google.com/mail/')
-            >>> U.url
-            'http://google.com/mail/'
-            >>> Url('http', 'username:password', 'host.com', 80,
-            ... '/path', 'query', 'fragment').url
-            'http://username:password@host.com:80/path?query#fragment'
-        """
-        scheme, auth, host, port, path, query, fragment = self
-        url = u""
-
-        # We use "is not None" we want things to happen with empty strings (or 0 port)
-        if scheme is not None:
-            url += scheme + u"://"
-        if auth is not None:
-            url += auth + u"@"
-        if host is not None:
-            url += host
-        if port is not None:
-            url += u":" + str(port)
-        if path is not None:
-            url += path
-        if query is not None:
-            url += u"?" + query
-        if fragment is not None:
-            url += u"#" + fragment
-
-        return url
-
-    def __str__(self):
-        return self.url
-
-
-def split_first(s, delims):
-    """
-    .. deprecated:: 1.25
-
-    Given a string and an iterable of delimiters, split on the first found
-    delimiter. Return two split parts and the matched delimiter.
-
-    If not found, then the first part is the full input string.
-
-    Example::
-
-        >>> split_first('foo/bar?baz', '?/=')
-        ('foo', 'bar?baz', '/')
-        >>> split_first('foo/bar?baz', '123')
-        ('foo/bar?baz', '', None)
-
-    Scales linearly with number of delims. Not ideal for large number of delims.
-    """
-    min_idx = None
-    min_delim = None
-    for d in delims:
-        idx = s.find(d)
-        if idx < 0:
-            continue
-
-        if min_idx is None or idx < min_idx:
-            min_idx = idx
-            min_delim = d
-
-    if min_idx is None or min_idx < 0:
-        return s, "", None
-
-    return s[:min_idx], s[min_idx + 1 :], min_delim
-
-
-def _encode_invalid_chars(component, allowed_chars, encoding="utf-8"):
-    """Percent-encodes a URI component without reapplying
-    onto an already percent-encoded component.
-    """
-    if component is None:
-        return component
-
-    component = six.ensure_text(component)
-
-    # Try to see if the component we're encoding is already percent-encoded
-    # so we can skip all '%' characters but still encode all others.
-    percent_encodings = PERCENT_RE.findall(component)
-
-    # Normalize existing percent-encoded bytes.
-    for enc in percent_encodings:
-        if not enc.isupper():
-            component = component.replace(enc, enc.upper())
-
-    uri_bytes = component.encode("utf-8", "surrogatepass")
-    is_percent_encoded = len(percent_encodings) == uri_bytes.count(b"%")
-
-    encoded_component = bytearray()
-
-    for i in range(0, len(uri_bytes)):
-        # Will return a single character bytestring on both Python 2 & 3
-        byte = uri_bytes[i : i + 1]
-        byte_ord = ord(byte)
-        if (is_percent_encoded and byte == b"%") or (
-            byte_ord < 128 and byte.decode() in allowed_chars
-        ):
-            encoded_component.extend(byte)
-            continue
-        encoded_component.extend(b"%" + (hex(byte_ord)[2:].encode().zfill(2).upper()))
-
-    return encoded_component.decode(encoding)
-
-
-def _remove_path_dot_segments(path):
-    # See http://tools.ietf.org/html/rfc3986#section-5.2.4 for pseudo-code
-    segments = path.split("/")  # Turn the path into a list of segments
-    output = []  # Initialize the variable to use to store output
-
-    for segment in segments:
-        # '.' is the current directory, so ignore it, it is superfluous
-        if segment == ".":
-            continue
-        # Anything other than '..', should be appended to the output
-        elif segment != "..":
-            output.append(segment)
-        # In this case segment == '..', if we can, we should pop the last
-        # element
-        elif output:
-            output.pop()
-
-    # If the path starts with '/' and the output is empty or the first string
-    # is non-empty
-    if path.startswith("/") and (not output or output[0]):
-        output.insert(0, "")
-
-    # If the path starts with '/.' or '/..' ensure we add one more empty
-    # string to add a trailing '/'
-    if path.endswith(("/.", "/..")):
-        output.append("")
-
-    return "/".join(output)
-
-
-def _normalize_host(host, scheme):
-    if host:
-        if isinstance(host, six.binary_type):
-            host = six.ensure_str(host)
-
-        if scheme in NORMALIZABLE_SCHEMES:
-            is_ipv6 = IPV6_ADDRZ_RE.match(host)
-            if is_ipv6:
-                match = ZONE_ID_RE.search(host)
-                if match:
-                    start, end = match.span(1)
-                    zone_id = host[start:end]
-
-                    if zone_id.startswith("%25") and zone_id != "%25":
-                        zone_id = zone_id[3:]
-                    else:
-                        zone_id = zone_id[1:]
-                    zone_id = "%" + _encode_invalid_chars(zone_id, UNRESERVED_CHARS)
-                    return host[:start].lower() + zone_id + host[end:]
-                else:
-                    return host.lower()
-            elif not IPV4_RE.match(host):
-                return six.ensure_str(
-                    b".".join([_idna_encode(label) for label in host.split(".")])
-                )
-    return host
-
-
-def _idna_encode(name):
-    if name and any([ord(x) > 128 for x in name]):
-        try:
-            import idna
-        except ImportError:
-            six.raise_from(
-                LocationParseError("Unable to parse URL without the 'idna' module"),
-                None,
-            )
-        try:
-            return idna.encode(name.lower(), strict=True, std3_rules=True)
-        except idna.IDNAError:
-            six.raise_from(
-                LocationParseError(u"Name '%s' is not a valid IDNA label" % name), None
-            )
-    return name.lower().encode("ascii")
-
-
-def _encode_target(target):
-    """Percent-encodes a request target so that there are no invalid characters"""
-    if not target.startswith("/"):
-        return target
-
-    path, query = TARGET_RE.match(target).groups()
-    target = _encode_invalid_chars(path, PATH_CHARS)
-    query = _encode_invalid_chars(query, QUERY_CHARS)
-    if query is not None:
-        target += "?" + query
-    return target
-
-
-def parse_url(url):
-    """
-    Given a url, return a parsed :class:`.Url` namedtuple. Best-effort is
-    performed to parse incomplete urls. Fields not provided will be None.
-    This parser is RFC 3986 compliant.
-
-    The parser logic and helper functions are based heavily on
-    work done in the ``rfc3986`` module.
-
-    :param str url: URL to parse into a :class:`.Url` namedtuple.
-
-    Partly backwards-compatible with :mod:`urlparse`.
-
-    Example::
-
-        >>> parse_url('http://google.com/mail/')
-        Url(scheme='http', host='google.com', port=None, path='/mail/', ...)
-        >>> parse_url('google.com:80')
-        Url(scheme=None, host='google.com', port=80, path=None, ...)
-        >>> parse_url('/foo?bar')
-        Url(scheme=None, host=None, port=None, path='/foo', query='bar', ...)
-    """
-    if not url:
-        # Empty
-        return Url()
-
-    source_url = url
-    if not SCHEME_RE.search(url):
-        url = "//" + url
-
-    try:
-        scheme, authority, path, query, fragment = URI_RE.match(url).groups()
-        normalize_uri = scheme is None or scheme.lower() in NORMALIZABLE_SCHEMES
-
-        if scheme:
-            scheme = scheme.lower()
-
-        if authority:
-            auth, host, port = SUBAUTHORITY_RE.match(authority).groups()
-            if auth and normalize_uri:
-                auth = _encode_invalid_chars(auth, USERINFO_CHARS)
-            if port == "":
-                port = None
-        else:
-            auth, host, port = None, None, None
-
-        if port is not None:
-            port = int(port)
-            if not (0 <= port <= 65535):
-                raise LocationParseError(url)
-
-        host = _normalize_host(host, scheme)
-
-        if normalize_uri and path:
-            path = _remove_path_dot_segments(path)
-            path = _encode_invalid_chars(path, PATH_CHARS)
-        if normalize_uri and query:
-            query = _encode_invalid_chars(query, QUERY_CHARS)
-        if normalize_uri and fragment:
-            fragment = _encode_invalid_chars(fragment, FRAGMENT_CHARS)
-
-    except (ValueError, AttributeError):
-        return six.raise_from(LocationParseError(source_url), None)
-
-    # For the sake of backwards compatibility we put empty
-    # string values for path if there are any defined values
-    # beyond the path in the URL.
-    # TODO: Remove this when we break backwards compatibility.
-    if not path:
-        if query is not None or fragment is not None:
-            path = ""
-        else:
-            path = None
-
-    # Ensure that each part of the URL is a `str` for
-    # backwards compatibility.
-    if isinstance(url, six.text_type):
-        ensure_func = six.ensure_text
-    else:
-        ensure_func = six.ensure_str
-
-    def ensure_type(x):
-        return x if x is None else ensure_func(x)
-
-    return Url(
-        scheme=ensure_type(scheme),
-        auth=ensure_type(auth),
-        host=ensure_type(host),
-        port=port,
-        path=ensure_type(path),
-        query=ensure_type(query),
-        fragment=ensure_type(fragment),
-    )
-
-
-def get_host(url):
-    """
-    Deprecated. Use :func:`parse_url` instead.
-    """
-    p = parse_url(url)
-    return p.scheme or "http", p.hostname, p.port
diff --git a/venv/lib/python3.7/site-packages/urllib3/util/wait.py b/venv/lib/python3.7/site-packages/urllib3/util/wait.py
deleted file mode 100644
index d71d2fd..0000000
--- a/venv/lib/python3.7/site-packages/urllib3/util/wait.py
+++ /dev/null
@@ -1,153 +0,0 @@
-import errno
-from functools import partial
-import select
-import sys
-
-try:
-    from time import monotonic
-except ImportError:
-    from time import time as monotonic
-
-__all__ = ["NoWayToWaitForSocketError", "wait_for_read", "wait_for_write"]
-
-
-class NoWayToWaitForSocketError(Exception):
-    pass
-
-
-# How should we wait on sockets?
-#
-# There are two types of APIs you can use for waiting on sockets: the fancy
-# modern stateful APIs like epoll/kqueue, and the older stateless APIs like
-# select/poll. The stateful APIs are more efficient when you have a lots of
-# sockets to keep track of, because you can set them up once and then use them
-# lots of times. But we only ever want to wait on a single socket at a time
-# and don't want to keep track of state, so the stateless APIs are actually
-# more efficient. So we want to use select() or poll().
-#
-# Now, how do we choose between select() and poll()? On traditional Unixes,
-# select() has a strange calling convention that makes it slow, or fail
-# altogether, for high-numbered file descriptors. The point of poll() is to fix
-# that, so on Unixes, we prefer poll().
-#
-# On Windows, there is no poll() (or at least Python doesn't provide a wrapper
-# for it), but that's OK, because on Windows, select() doesn't have this
-# strange calling convention; plain select() works fine.
-#
-# So: on Windows we use select(), and everywhere else we use poll(). We also
-# fall back to select() in case poll() is somehow broken or missing.
-
-if sys.version_info >= (3, 5):
-    # Modern Python, that retries syscalls by default
-    def _retry_on_intr(fn, timeout):
-        return fn(timeout)
-
-
-else:
-    # Old and broken Pythons.
-    def _retry_on_intr(fn, timeout):
-        if timeout is None:
-            deadline = float("inf")
-        else:
-            deadline = monotonic() + timeout
-
-        while True:
-            try:
-                return fn(timeout)
-            # OSError for 3 <= pyver < 3.5, select.error for pyver <= 2.7
-            except (OSError, select.error) as e:
-                # 'e.args[0]' incantation works for both OSError and select.error
-                if e.args[0] != errno.EINTR:
-                    raise
-                else:
-                    timeout = deadline - monotonic()
-                    if timeout < 0:
-                        timeout = 0
-                    if timeout == float("inf"):
-                        timeout = None
-                    continue
-
-
-def select_wait_for_socket(sock, read=False, write=False, timeout=None):
-    if not read and not write:
-        raise RuntimeError("must specify at least one of read=True, write=True")
-    rcheck = []
-    wcheck = []
-    if read:
-        rcheck.append(sock)
-    if write:
-        wcheck.append(sock)
-    # When doing a non-blocking connect, most systems signal success by
-    # marking the socket writable. Windows, though, signals success by marked
-    # it as "exceptional". We paper over the difference by checking the write
-    # sockets for both conditions. (The stdlib selectors module does the same
-    # thing.)
-    fn = partial(select.select, rcheck, wcheck, wcheck)
-    rready, wready, xready = _retry_on_intr(fn, timeout)
-    return bool(rready or wready or xready)
-
-
-def poll_wait_for_socket(sock, read=False, write=False, timeout=None):
-    if not read and not write:
-        raise RuntimeError("must specify at least one of read=True, write=True")
-    mask = 0
-    if read:
-        mask |= select.POLLIN
-    if write:
-        mask |= select.POLLOUT
-    poll_obj = select.poll()
-    poll_obj.register(sock, mask)
-
-    # For some reason, poll() takes timeout in milliseconds
-    def do_poll(t):
-        if t is not None:
-            t *= 1000
-        return poll_obj.poll(t)
-
-    return bool(_retry_on_intr(do_poll, timeout))
-
-
-def null_wait_for_socket(*args, **kwargs):
-    raise NoWayToWaitForSocketError("no select-equivalent available")
-
-
-def _have_working_poll():
-    # Apparently some systems have a select.poll that fails as soon as you try
-    # to use it, either due to strange configuration or broken monkeypatching
-    # from libraries like eventlet/greenlet.
-    try:
-        poll_obj = select.poll()
-        _retry_on_intr(poll_obj.poll, 0)
-    except (AttributeError, OSError):
-        return False
-    else:
-        return True
-
-
-def wait_for_socket(*args, **kwargs):
-    # We delay choosing which implementation to use until the first time we're
-    # called. We could do it at import time, but then we might make the wrong
-    # decision if someone goes wild with monkeypatching select.poll after
-    # we're imported.
-    global wait_for_socket
-    if _have_working_poll():
-        wait_for_socket = poll_wait_for_socket
-    elif hasattr(select, "select"):
-        wait_for_socket = select_wait_for_socket
-    else:  # Platform-specific: Appengine.
-        wait_for_socket = null_wait_for_socket
-    return wait_for_socket(*args, **kwargs)
-
-
-def wait_for_read(sock, timeout=None):
-    """ Waits for reading to be available on a given socket.
-    Returns True if the socket is readable, or False if the timeout expired.
-    """
-    return wait_for_socket(sock, read=True, timeout=timeout)
-
-
-def wait_for_write(sock, timeout=None):
-    """ Waits for writing to be available on a given socket.
-    Returns True if the socket is readable, or False if the timeout expired.
-    """
-    return wait_for_socket(sock, write=True, timeout=timeout)
diff --git a/venv/lib64 b/venv/lib64
deleted file mode 120000
index 7951405..0000000
--- a/venv/lib64
+++ /dev/null
@@ -1 +0,0 @@
-lib
\ No newline at end of file
diff --git a/venv/pyvenv.cfg b/venv/pyvenv.cfg
deleted file mode 100644
index bafe8a4..0000000
--- a/venv/pyvenv.cfg
+++ /dev/null
@@ -1,3 +0,0 @@
-home = /usr/bin
-include-system-site-packages = false
-version = 3.7.5