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Nicer Resolver output -- Try 1 #8861

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merged 5 commits into from
Sep 17, 2020
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@pradyunsg pradyunsg commented Sep 10, 2020

Fixes #8860
Also makes some progress on #8346


Before:

$ pip install --use-feature=2020-resolver "pyrax==1.9.8"
Collecting pyrax==1.9.8
  Using cached pyrax-1.9.8-py2.py3-none-any.whl (346 kB)
Collecting python-novaclient==2.27.0
  Using cached python_novaclient-2.27.0-py2.py3-none-any.whl (312 kB)
Processing /Users/pradyunsg/Library/Caches/pip/wheels/48/6d/77/9517cb933af254f51a446f1a5ec9c2be3e45f17384940bce68/prettytable-0.7.2-py3-none-any.whl
Collecting iso8601>=0.1.9
  Using cached iso8601-0.1.12-py3-none-any.whl (12 kB)
Collecting six<2,>=1.9.0
  Using cached six-1.15.0-py2.py3-none-any.whl (10 kB)
Collecting pbr<2.0,>=1.6
  Using cached pbr-1.10.0-py2.py3-none-any.whl (96 kB)
Processing /Users/pradyunsg/Library/Caches/pip/wheels/da/f1/6f/450a8e3042772f552f5316cfbd51552bb13995077e4502ba2f/rackspace_novaclient-2.1-py3-none-any.whl
Processing /Users/pradyunsg/Library/Caches/pip/wheels/45/42/fc/37502e2e6b8c5e745d2ec318c6d1ee9328ead3d704b5584797/ip_associations_python_novaclient_ext-0.2-py3-none-any.whl
Processing /Users/pradyunsg/Library/Caches/pip/wheels/bc/eb/b2/2d27f5c5d3d8caecebbf87ccb272f60ee278d968c1c3a10c85/os_diskconfig_python_novaclient_ext-0.1.3-py3-none-any.whl
Processing /Users/pradyunsg/Library/Caches/pip/wheels/b8/0c/c5/f4087714c89b18994a27c42c01bd9a8ce3bfcccf5d72ff978e/rackspace_auth_openstack-1.3-py3-none-any.whl
Processing /Users/pradyunsg/Library/Caches/pip/wheels/25/01/b7/d60cc1e3f2b4f9e5b359ce1b7fe03f65084020bfb0d4edcca2/os_networksv2_python_novaclient_ext-0.26-py3-none-any.whl
Processing /Users/pradyunsg/Library/Caches/pip/wheels/64/ce/0e/e407508c11ef0d63567a51a86302b44de81b78f602d7e8dc82/rax_scheduled_images_python_novaclient_ext-0.3.1-py3-none-any.whl
Processing /Users/pradyunsg/Library/Caches/pip/wheels/1d/b7/c2/8988a8a46e720cced366730c323604d1dba6644886f9a666aa/rax_default_network_flags_python_novaclient_ext-0.4.0-py3-none-any.whl
Processing /Users/pradyunsg/Library/Caches/pip/wheels/89/7c/51/371c863bd836d32c94f518678e612386ea757e4b195a080c78/os_virtual_interfacesv2_python_novaclient_ext-0.20-py3-none-any.whl
Collecting argparse
  Using cached argparse-1.4.0-py2.py3-none-any.whl (23 kB)
Collecting Babel>=1.3
  Using cached Babel-2.8.0-py2.py3-none-any.whl (8.6 MB)
Collecting pytz>=2015.7
  Using cached pytz-2020.1-py2.py3-none-any.whl (510 kB)
Collecting mock
  Using cached mock-4.0.2-py3-none-any.whl (28 kB)
Collecting python-keystoneclient>=1.6.0
  Using cached python_keystoneclient-4.1.0-py3-none-any.whl (390 kB)
Collecting python-keystoneclient>=1.6.0
  Using cached python_keystoneclient-4.0.0-py3-none-any.whl (397 kB)
Collecting python-keystoneclient>=1.6.0
  Using cached python_keystoneclient-3.22.0-py2.py3-none-any.whl (397 kB)
Collecting python-keystoneclient>=1.6.0
  Using cached python_keystoneclient-3.21.0-py2.py3-none-any.whl (395 kB)
Collecting python-keystoneclient>=1.6.0
  Using cached python_keystoneclient-3.20.0-py2.py3-none-any.whl (394 kB)
Collecting python-keystoneclient>=1.6.0
  Using cached python_keystoneclient-3.19.1-py2.py3-none-any.whl (394 kB)
Collecting python-keystoneclient>=1.6.0
  Using cached python_keystoneclient-3.19.0-py2.py3-none-any.whl (394 kB)
Collecting python-keystoneclient>=1.6.0
  Using cached python_keystoneclient-3.18.0-py2.py3-none-any.whl (393 kB)
Collecting python-keystoneclient>=1.6.0
  Using cached python_keystoneclient-3.17.0-py2.py3-none-any.whl (382 kB)
Collecting python-keystoneclient>=1.6.0
  Using cached python_keystoneclient-3.16.0-py2.py3-none-any.whl (376 kB)
Collecting python-keystoneclient>=1.6.0
  Using cached python_keystoneclient-3.15.1-py2.py3-none-any.whl (385 kB)
Collecting python-keystoneclient>=1.6.0
  Using cached python_keystoneclient-3.15.0-py2.py3-none-any.whl (378 kB)
Collecting python-keystoneclient>=1.6.0
  Using cached python_keystoneclient-3.14.0-py2.py3-none-any.whl (372 kB)
Collecting python-keystoneclient>=1.6.0
  Using cached python_keystoneclient-3.13.1-py2.py3-none-any.whl (381 kB)
Collecting python-keystoneclient>=1.6.0
  Using cached python_keystoneclient-3.13.0-py2.py3-none-any.whl (374 kB)
^C

After:

$ pip install --use-feature=2020-resolver "pyrax==1.9.8"
Collecting pyrax==1.9.8
  Using cached pyrax-1.9.8-py2.py3-none-any.whl (346 kB)
Collecting python-novaclient==2.27.0
  Using cached python_novaclient-2.27.0-py2.py3-none-any.whl (312 kB)
Collecting PrettyTable<0.8,>=0.7
  Using cached prettytable-0.7.2-py3-none-any.whl
Collecting iso8601>=0.1.9
  Using cached iso8601-0.1.12-py3-none-any.whl (12 kB)
Collecting six<2,>=1.9.0
  Using cached six-1.15.0-py2.py3-none-any.whl (10 kB)
Collecting pbr<2.0,>=1.6
  Using cached pbr-1.10.0-py2.py3-none-any.whl (96 kB)
Collecting rackspace-novaclient
  Using cached rackspace_novaclient-2.1-py3-none-any.whl
Collecting ip-associations-python-novaclient-ext
  Using cached ip_associations_python_novaclient_ext-0.2-py3-none-any.whl
Collecting os-diskconfig-python-novaclient-ext
  Using cached os_diskconfig_python_novaclient_ext-0.1.3-py3-none-any.whl
Collecting rackspace-auth-openstack
  Using cached rackspace_auth_openstack-1.3-py3-none-any.whl
Collecting os-networksv2-python-novaclient-ext
  Using cached os_networksv2_python_novaclient_ext-0.26-py3-none-any.whl
Collecting rax-scheduled-images-python-novaclient-ext
  Using cached rax_scheduled_images_python_novaclient_ext-0.3.1-py3-none-any.whl
Collecting rax-default-network-flags-python-novaclient-ext
  Using cached rax_default_network_flags_python_novaclient_ext-0.4.0-py3-none-any.whl
Collecting os-virtual-interfacesv2-python-novaclient-ext
  Using cached os_virtual_interfacesv2_python_novaclient_ext-0.20-py3-none-any.whl
Collecting Babel>=1.3
  Using cached Babel-2.8.0-py2.py3-none-any.whl (8.6 MB)
Collecting argparse
  Using cached argparse-1.4.0-py2.py3-none-any.whl (23 kB)
Collecting pytz>=2015.7
  Using cached pytz-2020.1-py2.py3-none-any.whl (510 kB)
Collecting mock
  Using cached mock-4.0.2-py3-none-any.whl (28 kB)
Collecting python-keystoneclient>=1.6.0
  Using cached python_keystoneclient-4.1.0-py3-none-any.whl (390 kB)
  Using cached python_keystoneclient-4.0.0-py3-none-any.whl (397 kB)
  Using cached python_keystoneclient-3.22.0-py2.py3-none-any.whl (397 kB)
  Using cached python_keystoneclient-3.21.0-py2.py3-none-any.whl (395 kB)
  Using cached python_keystoneclient-3.20.0-py2.py3-none-any.whl (394 kB)
  Using cached python_keystoneclient-3.19.1-py2.py3-none-any.whl (394 kB)
  Using cached python_keystoneclient-3.19.0-py2.py3-none-any.whl (394 kB)
  Using cached python_keystoneclient-3.18.0-py2.py3-none-any.whl (393 kB)
  Using cached python_keystoneclient-3.17.0-py2.py3-none-any.whl (382 kB)
  Using cached python_keystoneclient-3.16.0-py2.py3-none-any.whl (376 kB)
  Using cached python_keystoneclient-3.15.1-py2.py3-none-any.whl (385 kB)
  Using cached python_keystoneclient-3.15.0-py2.py3-none-any.whl (378 kB)
  Using cached python_keystoneclient-3.14.0-py2.py3-none-any.whl (372 kB)
  Using cached python_keystoneclient-3.13.1-py2.py3-none-any.whl (381 kB)
  Using cached python_keystoneclient-3.13.0-py2.py3-none-any.whl (374 kB)
  Using cached python_keystoneclient-3.12.0-py2.py3-none-any.whl (374 kB)
^C

This makes it easier to conditionally print this information.
This is specifically for the case of look ups done in the new resolver.
@pradyunsg pradyunsg added the type: enhancement Improvements to functionality label Sep 10, 2020
@pradyunsg
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@uranusjr 963e390 feels like a big fat bodge, but I'm not sure if that's a brilliant idea or a horrible one. :)

@pradyunsg
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To recreate this, I'd need a mix of cached remote URLs, locally-built-and-cached wheels and resolver backtracking -- and I'm not sure how to do that within our test harness. :)

@pradyunsg
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Okay, so this doesn't break anything.

@pfmoore or @uranusjr could you take a look at this and advise on the testing? I am very tempted to skip them. 🍩

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pfmoore commented Sep 11, 2020

Certainly looks better to me, and I agree that skipping tests seems OK. I'm not a fan of testing details of what we log anyway, it's too fragile. If we want to validate our reporting somehow, I think we need better tools than "just" tests - I don't know what (if any) techniques or best practices there are in this area, though, and that would be a whole other piece of work, IMO.

@pradyunsg pradyunsg marked this pull request as ready for review September 16, 2020 12:19
@pradyunsg pradyunsg merged commit 67ab116 into pypa:master Sep 17, 2020
@pradyunsg pradyunsg deleted the nicer-output-try-1 branch September 17, 2020 05:30
bors bot referenced this pull request in duckinator/emanate Dec 1, 2020
195: Update pip to 20.3 r=duckinator a=pyup-bot


This PR updates [pip](https://pypi.org/project/pip) from **20.2.4** to **20.3**.



<details>
  <summary>Changelog</summary>
  
  
   ### 20.3
   ```
   - Introduce a new ResolutionImpossible error, raised when pip encounters un-satisfiable dependency conflicts (`8546 &lt;https://github.com/pypa/pip/issues/8546&gt;`_, `8377 &lt;https://github.com/pypa/pip/issues/8377&gt;`_)
- Add a subcommand ``debug`` to ``pip config`` to list available configuration sources and the key-value pairs defined in them. (`6741 &lt;https://github.com/pypa/pip/issues/6741&gt;`_)
- Warn if index pages have unexpected content-type (`6754 &lt;https://github.com/pypa/pip/issues/6754&gt;`_)
- Allow specifying ``--prefer-binary`` option in a requirements file (`7693 &lt;https://github.com/pypa/pip/issues/7693&gt;`_)
- Generate PEP 376 REQUESTED metadata for user supplied requirements installed
  by pip. (`7811 &lt;https://github.com/pypa/pip/issues/7811&gt;`_)
- Warn if package url is a vcs or an archive url with invalid scheme (`8128 &lt;https://github.com/pypa/pip/issues/8128&gt;`_)
- Parallelize network operations in ``pip list``. (`8504 &lt;https://github.com/pypa/pip/issues/8504&gt;`_)
- Allow the new resolver to obtain dependency information through wheels
  lazily downloaded using HTTP range requests.  To enable this feature,
  invoke ``pip`` with ``--use-feature=fast-deps``. (`8588 &lt;https://github.com/pypa/pip/issues/8588&gt;`_)
- Support ``--use-feature`` in requirements files (`8601 &lt;https://github.com/pypa/pip/issues/8601&gt;`_)

Bug Fixes
---------

- Use canonical package names while looking up already installed packages. (`5021 &lt;https://github.com/pypa/pip/issues/5021&gt;`_)
- Fix normalizing path on Windows when installing package on another logical disk. (`7625 &lt;https://github.com/pypa/pip/issues/7625&gt;`_)
- The VCS commands run by pip as subprocesses don&#39;t merge stdout and stderr anymore, improving the output parsing by subsequent commands. (`7968 &lt;https://github.com/pypa/pip/issues/7968&gt;`_)
- Correctly treat non-ASCII entry point declarations in wheels so they can be
  installed on Windows. (`8342 &lt;https://github.com/pypa/pip/issues/8342&gt;`_)
- Update author email in config and tests to reflect decommissioning of pypa-dev list. (`8454 &lt;https://github.com/pypa/pip/issues/8454&gt;`_)
- Headers provided by wheels in .data directories are now correctly installed
  into the user-provided locations, such as ``--prefix``, instead of the virtual
  environment pip is running in. (`8521 &lt;https://github.com/pypa/pip/issues/8521&gt;`_)

Vendored Libraries
------------------

- Vendored htmlib5 no longer imports deprecated xml.etree.cElementTree on Python 3.
- Upgrade appdirs to 1.4.4
- Upgrade certifi to 2020.6.20
- Upgrade distlib to 0.3.1
- Upgrade html5lib to 1.1
- Upgrade idna to 2.10
- Upgrade packaging to 20.4
- Upgrade requests to 2.24.0
- Upgrade six to 1.15.0
- Upgrade toml to 0.10.1
- Upgrade urllib3 to 1.25.9

Improved Documentation
----------------------

- Add ``--no-input`` option to pip docs (`7688 &lt;https://github.com/pypa/pip/issues/7688&gt;`_)
- List of options supported in requirements file are extracted from source of truth,
  instead of being maintained manually. (`7908 &lt;https://github.com/pypa/pip/issues/7908&gt;`_)
- Fix pip config docstring so that the subcommands render correctly in the docs (`8072 &lt;https://github.com/pypa/pip/issues/8072&gt;`_)
- replace links to the old pypa-dev mailing list with https://mail.python.org/mailman3/lists/distutils-sig.python.org/ (`8353 &lt;https://github.com/pypa/pip/issues/8353&gt;`_)
- Fix example for defining multiple values for options which support them (`8373 &lt;https://github.com/pypa/pip/issues/8373&gt;`_)
- Add documentation for the ResolutionImpossible error that helps the user fix dependency conflicts (`8459 &lt;https://github.com/pypa/pip/issues/8459&gt;`_)
- Add feature flags to docs (`8512 &lt;https://github.com/pypa/pip/issues/8512&gt;`_)
- Document how to install package extras from git branch and source distributions. (`8576 &lt;https://github.com/pypa/pip/issues/8576&gt;`_)
   ```
   
  
  
   ### 20.3b1
   ```
   ===================

Deprecations and Removals
-------------------------

- ``pip freeze`` will stop filtering the ``pip``, ``setuptools``, ``distribute`` and ``wheel`` packages from ``pip freeze`` output in a future version.
  To keep the previous behavior, users should use the new ``--exclude`` option. (`4256 &lt;https://github.com/pypa/pip/issues/4256&gt;`_)
- Deprecate support for Python 3.5 (`8181 &lt;https://github.com/pypa/pip/issues/8181&gt;`_)
- Document that certain removals can be fast tracked. (`8417 &lt;https://github.com/pypa/pip/issues/8417&gt;`_)
- Document that Python versions are generally supported until PyPI usage falls below 5%. (`8927 &lt;https://github.com/pypa/pip/issues/8927&gt;`_)
- Deprecate ``--find-links`` option in ``pip freeze`` (`9069 &lt;https://github.com/pypa/pip/issues/9069&gt;`_)

Features
--------

- Add ``--exclude`` option to ``pip freeze`` and ``pip list`` commands to explicitly exclude packages from the output. (`4256 &lt;https://github.com/pypa/pip/issues/4256&gt;`_)
- Allow multiple values for --abi and --platform. (`6121 &lt;https://github.com/pypa/pip/issues/6121&gt;`_)
- Add option ``--format`` to subcommand ``list`` of ``pip  cache``, with ``abspath`` choice to output the full path of a wheel file. (`8355 &lt;https://github.com/pypa/pip/issues/8355&gt;`_)
- Improve error message friendliness when an environment has packages with
  corrupted metadata. (`8676 &lt;https://github.com/pypa/pip/issues/8676&gt;`_)
- Make the ``setup.py install`` deprecation warning less noisy. We warn only
  when ``setup.py install`` succeeded and ``setup.py bdist_wheel`` failed, as
  situations where both fails are most probably irrelevant to this deprecation. (`8752 &lt;https://github.com/pypa/pip/issues/8752&gt;`_)
- Check the download directory for existing wheels to possibly avoid
  fetching metadata when the ``fast-deps`` feature is used with
  ``pip wheel`` and ``pip download``. (`8804 &lt;https://github.com/pypa/pip/issues/8804&gt;`_)
- When installing a git URL that refers to a commit that is not available locally
  after git clone, attempt to fetch it from the remote. (`8815 &lt;https://github.com/pypa/pip/issues/8815&gt;`_)
- Include http subdirectory in ``pip cache info`` and ``pip cache purge`` commands. (`8892 &lt;https://github.com/pypa/pip/issues/8892&gt;`_)
- Cache package listings on index packages so they are guarenteed to stay stable
  during a pip command session. This also improves performance when a index page
  is accessed multiple times during the command session. (`8905 &lt;https://github.com/pypa/pip/issues/8905&gt;`_)
- New resolver: Tweak resolution logic to improve user experience when
  user-supplied requirements conflict. (`8924 &lt;https://github.com/pypa/pip/issues/8924&gt;`_)
- Support Python 3.9. (`8971 &lt;https://github.com/pypa/pip/issues/8971&gt;`_)
- Log an informational message when backtracking takes multiple rounds on a specific package. (`8975 &lt;https://github.com/pypa/pip/issues/8975&gt;`_)
- Switch to the new dependency resolver by default. (`9019 &lt;https://github.com/pypa/pip/issues/9019&gt;`_)
- Remove the ``--build-dir`` option, as per the deprecation. (`9049 &lt;https://github.com/pypa/pip/issues/9049&gt;`_)

Bug Fixes
---------

- Propagate ``--extra-index-url`` from requirements file properly to session auth,
  so that keyring auth will work as expected. (`8103 &lt;https://github.com/pypa/pip/issues/8103&gt;`_)
- Allow specifying verbosity and quiet level via configuration files
  and environment variables. Previously these options were treated as
  boolean values when read from there while through CLI the level can be
  specified. (`8578 &lt;https://github.com/pypa/pip/issues/8578&gt;`_)
- Only converts Windows path to unicode on Python 2 to avoid regressions when a
  POSIX environment does not configure the file system encoding correctly. (`8658 &lt;https://github.com/pypa/pip/issues/8658&gt;`_)
- List downloaded distributions before exiting ``pip download``
  when using the new resolver to make the behavior the same as
  that on the legacy resolver. (`8696 &lt;https://github.com/pypa/pip/issues/8696&gt;`_)
- New resolver: Pick up hash declarations in constraints files and use them to
  filter available distributions. (`8792 &lt;https://github.com/pypa/pip/issues/8792&gt;`_)
- Avoid polluting the destination directory by resolution artifacts
  when the new resolver is used for ``pip download`` or ``pip wheel``. (`8827 &lt;https://github.com/pypa/pip/issues/8827&gt;`_)
- New resolver: If a package appears multiple times in user specification with
  different ``--hash`` options, only hashes that present in all specifications
  should be allowed. (`8839 &lt;https://github.com/pypa/pip/issues/8839&gt;`_)
- Tweak the output during dependency resolution in the new resolver. (`8861 &lt;https://github.com/pypa/pip/issues/8861&gt;`_)
- Correctly search for installed distributions in new resolver logic in order
  to not miss packages (virtualenv packages from system-wide-packages for example) (`8963 &lt;https://github.com/pypa/pip/issues/8963&gt;`_)
- Do not fail in pip freeze when encountering a ``direct_url.json`` metadata file
  with editable=True. Render it as a non-editable ``file://`` URL until modern
  editable installs are standardized and supported. (`8996 &lt;https://github.com/pypa/pip/issues/8996&gt;`_)

Vendored Libraries
------------------

- Fix devendoring instructions to explicitly state that ``vendor.txt`` should not be removed.
  It is mandatory for ``pip debug`` command.

Improved Documentation
----------------------

- Add documentation for &#39;.netrc&#39; support. (`7231 &lt;https://github.com/pypa/pip/issues/7231&gt;`_)
- Add OS tabs for OS-specific commands. (`7311 &lt;https://github.com/pypa/pip/issues/7311&gt;`_)
- Add note and example on keyring support for index basic-auth (`8636 &lt;https://github.com/pypa/pip/issues/8636&gt;`_)
- Added initial UX feedback widgets to docs. (`8783 &lt;https://github.com/pypa/pip/issues/8783&gt;`_, `8848 &lt;https://github.com/pypa/pip/issues/8848&gt;`_)
- Add ux documentation (`8807 &lt;https://github.com/pypa/pip/issues/8807&gt;`_)
- Update user docs to reflect new resolver as default in 20.3. (`9044 &lt;https://github.com/pypa/pip/issues/9044&gt;`_)
- Improve migration guide to reflect changes in new resolver behavior. (`9056 &lt;https://github.com/pypa/pip/issues/9056&gt;`_)
   ```
   
  
</details>


 

<details>
  <summary>Links</summary>
  
  - PyPI: https://pypi.org/project/pip
  - Changelog: https://pyup.io/changelogs/pip/
  - Homepage: https://pip.pypa.io/
</details>



Co-authored-by: pyup-bot <[email protected]>
bors bot referenced this pull request in duckinator/emanate Dec 1, 2020
195: Update pip to 20.3 r=duckinator a=pyup-bot


This PR updates [pip](https://pypi.org/project/pip) from **20.2.4** to **20.3**.



<details>
  <summary>Changelog</summary>
  
  
   ### 20.3
   ```
   - Introduce a new ResolutionImpossible error, raised when pip encounters un-satisfiable dependency conflicts (`8546 &lt;https://github.com/pypa/pip/issues/8546&gt;`_, `8377 &lt;https://github.com/pypa/pip/issues/8377&gt;`_)
- Add a subcommand ``debug`` to ``pip config`` to list available configuration sources and the key-value pairs defined in them. (`6741 &lt;https://github.com/pypa/pip/issues/6741&gt;`_)
- Warn if index pages have unexpected content-type (`6754 &lt;https://github.com/pypa/pip/issues/6754&gt;`_)
- Allow specifying ``--prefer-binary`` option in a requirements file (`7693 &lt;https://github.com/pypa/pip/issues/7693&gt;`_)
- Generate PEP 376 REQUESTED metadata for user supplied requirements installed
  by pip. (`7811 &lt;https://github.com/pypa/pip/issues/7811&gt;`_)
- Warn if package url is a vcs or an archive url with invalid scheme (`8128 &lt;https://github.com/pypa/pip/issues/8128&gt;`_)
- Parallelize network operations in ``pip list``. (`8504 &lt;https://github.com/pypa/pip/issues/8504&gt;`_)
- Allow the new resolver to obtain dependency information through wheels
  lazily downloaded using HTTP range requests.  To enable this feature,
  invoke ``pip`` with ``--use-feature=fast-deps``. (`8588 &lt;https://github.com/pypa/pip/issues/8588&gt;`_)
- Support ``--use-feature`` in requirements files (`8601 &lt;https://github.com/pypa/pip/issues/8601&gt;`_)

Bug Fixes
---------

- Use canonical package names while looking up already installed packages. (`5021 &lt;https://github.com/pypa/pip/issues/5021&gt;`_)
- Fix normalizing path on Windows when installing package on another logical disk. (`7625 &lt;https://github.com/pypa/pip/issues/7625&gt;`_)
- The VCS commands run by pip as subprocesses don&#39;t merge stdout and stderr anymore, improving the output parsing by subsequent commands. (`7968 &lt;https://github.com/pypa/pip/issues/7968&gt;`_)
- Correctly treat non-ASCII entry point declarations in wheels so they can be
  installed on Windows. (`8342 &lt;https://github.com/pypa/pip/issues/8342&gt;`_)
- Update author email in config and tests to reflect decommissioning of pypa-dev list. (`8454 &lt;https://github.com/pypa/pip/issues/8454&gt;`_)
- Headers provided by wheels in .data directories are now correctly installed
  into the user-provided locations, such as ``--prefix``, instead of the virtual
  environment pip is running in. (`8521 &lt;https://github.com/pypa/pip/issues/8521&gt;`_)

Vendored Libraries
------------------

- Vendored htmlib5 no longer imports deprecated xml.etree.cElementTree on Python 3.
- Upgrade appdirs to 1.4.4
- Upgrade certifi to 2020.6.20
- Upgrade distlib to 0.3.1
- Upgrade html5lib to 1.1
- Upgrade idna to 2.10
- Upgrade packaging to 20.4
- Upgrade requests to 2.24.0
- Upgrade six to 1.15.0
- Upgrade toml to 0.10.1
- Upgrade urllib3 to 1.25.9

Improved Documentation
----------------------

- Add ``--no-input`` option to pip docs (`7688 &lt;https://github.com/pypa/pip/issues/7688&gt;`_)
- List of options supported in requirements file are extracted from source of truth,
  instead of being maintained manually. (`7908 &lt;https://github.com/pypa/pip/issues/7908&gt;`_)
- Fix pip config docstring so that the subcommands render correctly in the docs (`8072 &lt;https://github.com/pypa/pip/issues/8072&gt;`_)
- replace links to the old pypa-dev mailing list with https://mail.python.org/mailman3/lists/distutils-sig.python.org/ (`8353 &lt;https://github.com/pypa/pip/issues/8353&gt;`_)
- Fix example for defining multiple values for options which support them (`8373 &lt;https://github.com/pypa/pip/issues/8373&gt;`_)
- Add documentation for the ResolutionImpossible error that helps the user fix dependency conflicts (`8459 &lt;https://github.com/pypa/pip/issues/8459&gt;`_)
- Add feature flags to docs (`8512 &lt;https://github.com/pypa/pip/issues/8512&gt;`_)
- Document how to install package extras from git branch and source distributions. (`8576 &lt;https://github.com/pypa/pip/issues/8576&gt;`_)
   ```
   
  
  
   ### 20.3b1
   ```
   ===================

Deprecations and Removals
-------------------------

- ``pip freeze`` will stop filtering the ``pip``, ``setuptools``, ``distribute`` and ``wheel`` packages from ``pip freeze`` output in a future version.
  To keep the previous behavior, users should use the new ``--exclude`` option. (`4256 &lt;https://github.com/pypa/pip/issues/4256&gt;`_)
- Deprecate support for Python 3.5 (`8181 &lt;https://github.com/pypa/pip/issues/8181&gt;`_)
- Document that certain removals can be fast tracked. (`8417 &lt;https://github.com/pypa/pip/issues/8417&gt;`_)
- Document that Python versions are generally supported until PyPI usage falls below 5%. (`8927 &lt;https://github.com/pypa/pip/issues/8927&gt;`_)
- Deprecate ``--find-links`` option in ``pip freeze`` (`9069 &lt;https://github.com/pypa/pip/issues/9069&gt;`_)

Features
--------

- Add ``--exclude`` option to ``pip freeze`` and ``pip list`` commands to explicitly exclude packages from the output. (`4256 &lt;https://github.com/pypa/pip/issues/4256&gt;`_)
- Allow multiple values for --abi and --platform. (`6121 &lt;https://github.com/pypa/pip/issues/6121&gt;`_)
- Add option ``--format`` to subcommand ``list`` of ``pip  cache``, with ``abspath`` choice to output the full path of a wheel file. (`8355 &lt;https://github.com/pypa/pip/issues/8355&gt;`_)
- Improve error message friendliness when an environment has packages with
  corrupted metadata. (`8676 &lt;https://github.com/pypa/pip/issues/8676&gt;`_)
- Make the ``setup.py install`` deprecation warning less noisy. We warn only
  when ``setup.py install`` succeeded and ``setup.py bdist_wheel`` failed, as
  situations where both fails are most probably irrelevant to this deprecation. (`8752 &lt;https://github.com/pypa/pip/issues/8752&gt;`_)
- Check the download directory for existing wheels to possibly avoid
  fetching metadata when the ``fast-deps`` feature is used with
  ``pip wheel`` and ``pip download``. (`8804 &lt;https://github.com/pypa/pip/issues/8804&gt;`_)
- When installing a git URL that refers to a commit that is not available locally
  after git clone, attempt to fetch it from the remote. (`8815 &lt;https://github.com/pypa/pip/issues/8815&gt;`_)
- Include http subdirectory in ``pip cache info`` and ``pip cache purge`` commands. (`8892 &lt;https://github.com/pypa/pip/issues/8892&gt;`_)
- Cache package listings on index packages so they are guarenteed to stay stable
  during a pip command session. This also improves performance when a index page
  is accessed multiple times during the command session. (`8905 &lt;https://github.com/pypa/pip/issues/8905&gt;`_)
- New resolver: Tweak resolution logic to improve user experience when
  user-supplied requirements conflict. (`8924 &lt;https://github.com/pypa/pip/issues/8924&gt;`_)
- Support Python 3.9. (`8971 &lt;https://github.com/pypa/pip/issues/8971&gt;`_)
- Log an informational message when backtracking takes multiple rounds on a specific package. (`8975 &lt;https://github.com/pypa/pip/issues/8975&gt;`_)
- Switch to the new dependency resolver by default. (`9019 &lt;https://github.com/pypa/pip/issues/9019&gt;`_)
- Remove the ``--build-dir`` option, as per the deprecation. (`9049 &lt;https://github.com/pypa/pip/issues/9049&gt;`_)

Bug Fixes
---------

- Propagate ``--extra-index-url`` from requirements file properly to session auth,
  so that keyring auth will work as expected. (`8103 &lt;https://github.com/pypa/pip/issues/8103&gt;`_)
- Allow specifying verbosity and quiet level via configuration files
  and environment variables. Previously these options were treated as
  boolean values when read from there while through CLI the level can be
  specified. (`8578 &lt;https://github.com/pypa/pip/issues/8578&gt;`_)
- Only converts Windows path to unicode on Python 2 to avoid regressions when a
  POSIX environment does not configure the file system encoding correctly. (`8658 &lt;https://github.com/pypa/pip/issues/8658&gt;`_)
- List downloaded distributions before exiting ``pip download``
  when using the new resolver to make the behavior the same as
  that on the legacy resolver. (`8696 &lt;https://github.com/pypa/pip/issues/8696&gt;`_)
- New resolver: Pick up hash declarations in constraints files and use them to
  filter available distributions. (`8792 &lt;https://github.com/pypa/pip/issues/8792&gt;`_)
- Avoid polluting the destination directory by resolution artifacts
  when the new resolver is used for ``pip download`` or ``pip wheel``. (`8827 &lt;https://github.com/pypa/pip/issues/8827&gt;`_)
- New resolver: If a package appears multiple times in user specification with
  different ``--hash`` options, only hashes that present in all specifications
  should be allowed. (`8839 &lt;https://github.com/pypa/pip/issues/8839&gt;`_)
- Tweak the output during dependency resolution in the new resolver. (`8861 &lt;https://github.com/pypa/pip/issues/8861&gt;`_)
- Correctly search for installed distributions in new resolver logic in order
  to not miss packages (virtualenv packages from system-wide-packages for example) (`8963 &lt;https://github.com/pypa/pip/issues/8963&gt;`_)
- Do not fail in pip freeze when encountering a ``direct_url.json`` metadata file
  with editable=True. Render it as a non-editable ``file://`` URL until modern
  editable installs are standardized and supported. (`8996 &lt;https://github.com/pypa/pip/issues/8996&gt;`_)

Vendored Libraries
------------------

- Fix devendoring instructions to explicitly state that ``vendor.txt`` should not be removed.
  It is mandatory for ``pip debug`` command.

Improved Documentation
----------------------

- Add documentation for &#39;.netrc&#39; support. (`7231 &lt;https://github.com/pypa/pip/issues/7231&gt;`_)
- Add OS tabs for OS-specific commands. (`7311 &lt;https://github.com/pypa/pip/issues/7311&gt;`_)
- Add note and example on keyring support for index basic-auth (`8636 &lt;https://github.com/pypa/pip/issues/8636&gt;`_)
- Added initial UX feedback widgets to docs. (`8783 &lt;https://github.com/pypa/pip/issues/8783&gt;`_, `8848 &lt;https://github.com/pypa/pip/issues/8848&gt;`_)
- Add ux documentation (`8807 &lt;https://github.com/pypa/pip/issues/8807&gt;`_)
- Update user docs to reflect new resolver as default in 20.3. (`9044 &lt;https://github.com/pypa/pip/issues/9044&gt;`_)
- Improve migration guide to reflect changes in new resolver behavior. (`9056 &lt;https://github.com/pypa/pip/issues/9056&gt;`_)
   ```
   
  
</details>


 

<details>
  <summary>Links</summary>
  
  - PyPI: https://pypi.org/project/pip
  - Changelog: https://pyup.io/changelogs/pip/
  - Homepage: https://pip.pypa.io/
</details>



Co-authored-by: pyup-bot <[email protected]>
bors bot referenced this pull request in duckinator/emanate Dec 1, 2020
195: Update pip to 20.3 r=duckinator a=pyup-bot


This PR updates [pip](https://pypi.org/project/pip) from **20.2.4** to **20.3**.



<details>
  <summary>Changelog</summary>
  
  
   ### 20.3
   ```
   - Introduce a new ResolutionImpossible error, raised when pip encounters un-satisfiable dependency conflicts (`8546 &lt;https://github.com/pypa/pip/issues/8546&gt;`_, `8377 &lt;https://github.com/pypa/pip/issues/8377&gt;`_)
- Add a subcommand ``debug`` to ``pip config`` to list available configuration sources and the key-value pairs defined in them. (`6741 &lt;https://github.com/pypa/pip/issues/6741&gt;`_)
- Warn if index pages have unexpected content-type (`6754 &lt;https://github.com/pypa/pip/issues/6754&gt;`_)
- Allow specifying ``--prefer-binary`` option in a requirements file (`7693 &lt;https://github.com/pypa/pip/issues/7693&gt;`_)
- Generate PEP 376 REQUESTED metadata for user supplied requirements installed
  by pip. (`7811 &lt;https://github.com/pypa/pip/issues/7811&gt;`_)
- Warn if package url is a vcs or an archive url with invalid scheme (`8128 &lt;https://github.com/pypa/pip/issues/8128&gt;`_)
- Parallelize network operations in ``pip list``. (`8504 &lt;https://github.com/pypa/pip/issues/8504&gt;`_)
- Allow the new resolver to obtain dependency information through wheels
  lazily downloaded using HTTP range requests.  To enable this feature,
  invoke ``pip`` with ``--use-feature=fast-deps``. (`8588 &lt;https://github.com/pypa/pip/issues/8588&gt;`_)
- Support ``--use-feature`` in requirements files (`8601 &lt;https://github.com/pypa/pip/issues/8601&gt;`_)

Bug Fixes
---------

- Use canonical package names while looking up already installed packages. (`5021 &lt;https://github.com/pypa/pip/issues/5021&gt;`_)
- Fix normalizing path on Windows when installing package on another logical disk. (`7625 &lt;https://github.com/pypa/pip/issues/7625&gt;`_)
- The VCS commands run by pip as subprocesses don&#39;t merge stdout and stderr anymore, improving the output parsing by subsequent commands. (`7968 &lt;https://github.com/pypa/pip/issues/7968&gt;`_)
- Correctly treat non-ASCII entry point declarations in wheels so they can be
  installed on Windows. (`8342 &lt;https://github.com/pypa/pip/issues/8342&gt;`_)
- Update author email in config and tests to reflect decommissioning of pypa-dev list. (`8454 &lt;https://github.com/pypa/pip/issues/8454&gt;`_)
- Headers provided by wheels in .data directories are now correctly installed
  into the user-provided locations, such as ``--prefix``, instead of the virtual
  environment pip is running in. (`8521 &lt;https://github.com/pypa/pip/issues/8521&gt;`_)

Vendored Libraries
------------------

- Vendored htmlib5 no longer imports deprecated xml.etree.cElementTree on Python 3.
- Upgrade appdirs to 1.4.4
- Upgrade certifi to 2020.6.20
- Upgrade distlib to 0.3.1
- Upgrade html5lib to 1.1
- Upgrade idna to 2.10
- Upgrade packaging to 20.4
- Upgrade requests to 2.24.0
- Upgrade six to 1.15.0
- Upgrade toml to 0.10.1
- Upgrade urllib3 to 1.25.9

Improved Documentation
----------------------

- Add ``--no-input`` option to pip docs (`7688 &lt;https://github.com/pypa/pip/issues/7688&gt;`_)
- List of options supported in requirements file are extracted from source of truth,
  instead of being maintained manually. (`7908 &lt;https://github.com/pypa/pip/issues/7908&gt;`_)
- Fix pip config docstring so that the subcommands render correctly in the docs (`8072 &lt;https://github.com/pypa/pip/issues/8072&gt;`_)
- replace links to the old pypa-dev mailing list with https://mail.python.org/mailman3/lists/distutils-sig.python.org/ (`8353 &lt;https://github.com/pypa/pip/issues/8353&gt;`_)
- Fix example for defining multiple values for options which support them (`8373 &lt;https://github.com/pypa/pip/issues/8373&gt;`_)
- Add documentation for the ResolutionImpossible error that helps the user fix dependency conflicts (`8459 &lt;https://github.com/pypa/pip/issues/8459&gt;`_)
- Add feature flags to docs (`8512 &lt;https://github.com/pypa/pip/issues/8512&gt;`_)
- Document how to install package extras from git branch and source distributions. (`8576 &lt;https://github.com/pypa/pip/issues/8576&gt;`_)
   ```
   
  
  
   ### 20.3b1
   ```
   ===================

Deprecations and Removals
-------------------------

- ``pip freeze`` will stop filtering the ``pip``, ``setuptools``, ``distribute`` and ``wheel`` packages from ``pip freeze`` output in a future version.
  To keep the previous behavior, users should use the new ``--exclude`` option. (`4256 &lt;https://github.com/pypa/pip/issues/4256&gt;`_)
- Deprecate support for Python 3.5 (`8181 &lt;https://github.com/pypa/pip/issues/8181&gt;`_)
- Document that certain removals can be fast tracked. (`8417 &lt;https://github.com/pypa/pip/issues/8417&gt;`_)
- Document that Python versions are generally supported until PyPI usage falls below 5%. (`8927 &lt;https://github.com/pypa/pip/issues/8927&gt;`_)
- Deprecate ``--find-links`` option in ``pip freeze`` (`9069 &lt;https://github.com/pypa/pip/issues/9069&gt;`_)

Features
--------

- Add ``--exclude`` option to ``pip freeze`` and ``pip list`` commands to explicitly exclude packages from the output. (`4256 &lt;https://github.com/pypa/pip/issues/4256&gt;`_)
- Allow multiple values for --abi and --platform. (`6121 &lt;https://github.com/pypa/pip/issues/6121&gt;`_)
- Add option ``--format`` to subcommand ``list`` of ``pip  cache``, with ``abspath`` choice to output the full path of a wheel file. (`8355 &lt;https://github.com/pypa/pip/issues/8355&gt;`_)
- Improve error message friendliness when an environment has packages with
  corrupted metadata. (`8676 &lt;https://github.com/pypa/pip/issues/8676&gt;`_)
- Make the ``setup.py install`` deprecation warning less noisy. We warn only
  when ``setup.py install`` succeeded and ``setup.py bdist_wheel`` failed, as
  situations where both fails are most probably irrelevant to this deprecation. (`8752 &lt;https://github.com/pypa/pip/issues/8752&gt;`_)
- Check the download directory for existing wheels to possibly avoid
  fetching metadata when the ``fast-deps`` feature is used with
  ``pip wheel`` and ``pip download``. (`8804 &lt;https://github.com/pypa/pip/issues/8804&gt;`_)
- When installing a git URL that refers to a commit that is not available locally
  after git clone, attempt to fetch it from the remote. (`8815 &lt;https://github.com/pypa/pip/issues/8815&gt;`_)
- Include http subdirectory in ``pip cache info`` and ``pip cache purge`` commands. (`8892 &lt;https://github.com/pypa/pip/issues/8892&gt;`_)
- Cache package listings on index packages so they are guarenteed to stay stable
  during a pip command session. This also improves performance when a index page
  is accessed multiple times during the command session. (`8905 &lt;https://github.com/pypa/pip/issues/8905&gt;`_)
- New resolver: Tweak resolution logic to improve user experience when
  user-supplied requirements conflict. (`8924 &lt;https://github.com/pypa/pip/issues/8924&gt;`_)
- Support Python 3.9. (`8971 &lt;https://github.com/pypa/pip/issues/8971&gt;`_)
- Log an informational message when backtracking takes multiple rounds on a specific package. (`8975 &lt;https://github.com/pypa/pip/issues/8975&gt;`_)
- Switch to the new dependency resolver by default. (`9019 &lt;https://github.com/pypa/pip/issues/9019&gt;`_)
- Remove the ``--build-dir`` option, as per the deprecation. (`9049 &lt;https://github.com/pypa/pip/issues/9049&gt;`_)

Bug Fixes
---------

- Propagate ``--extra-index-url`` from requirements file properly to session auth,
  so that keyring auth will work as expected. (`8103 &lt;https://github.com/pypa/pip/issues/8103&gt;`_)
- Allow specifying verbosity and quiet level via configuration files
  and environment variables. Previously these options were treated as
  boolean values when read from there while through CLI the level can be
  specified. (`8578 &lt;https://github.com/pypa/pip/issues/8578&gt;`_)
- Only converts Windows path to unicode on Python 2 to avoid regressions when a
  POSIX environment does not configure the file system encoding correctly. (`8658 &lt;https://github.com/pypa/pip/issues/8658&gt;`_)
- List downloaded distributions before exiting ``pip download``
  when using the new resolver to make the behavior the same as
  that on the legacy resolver. (`8696 &lt;https://github.com/pypa/pip/issues/8696&gt;`_)
- New resolver: Pick up hash declarations in constraints files and use them to
  filter available distributions. (`8792 &lt;https://github.com/pypa/pip/issues/8792&gt;`_)
- Avoid polluting the destination directory by resolution artifacts
  when the new resolver is used for ``pip download`` or ``pip wheel``. (`8827 &lt;https://github.com/pypa/pip/issues/8827&gt;`_)
- New resolver: If a package appears multiple times in user specification with
  different ``--hash`` options, only hashes that present in all specifications
  should be allowed. (`8839 &lt;https://github.com/pypa/pip/issues/8839&gt;`_)
- Tweak the output during dependency resolution in the new resolver. (`8861 &lt;https://github.com/pypa/pip/issues/8861&gt;`_)
- Correctly search for installed distributions in new resolver logic in order
  to not miss packages (virtualenv packages from system-wide-packages for example) (`8963 &lt;https://github.com/pypa/pip/issues/8963&gt;`_)
- Do not fail in pip freeze when encountering a ``direct_url.json`` metadata file
  with editable=True. Render it as a non-editable ``file://`` URL until modern
  editable installs are standardized and supported. (`8996 &lt;https://github.com/pypa/pip/issues/8996&gt;`_)

Vendored Libraries
------------------

- Fix devendoring instructions to explicitly state that ``vendor.txt`` should not be removed.
  It is mandatory for ``pip debug`` command.

Improved Documentation
----------------------

- Add documentation for &#39;.netrc&#39; support. (`7231 &lt;https://github.com/pypa/pip/issues/7231&gt;`_)
- Add OS tabs for OS-specific commands. (`7311 &lt;https://github.com/pypa/pip/issues/7311&gt;`_)
- Add note and example on keyring support for index basic-auth (`8636 &lt;https://github.com/pypa/pip/issues/8636&gt;`_)
- Added initial UX feedback widgets to docs. (`8783 &lt;https://github.com/pypa/pip/issues/8783&gt;`_, `8848 &lt;https://github.com/pypa/pip/issues/8848&gt;`_)
- Add ux documentation (`8807 &lt;https://github.com/pypa/pip/issues/8807&gt;`_)
- Update user docs to reflect new resolver as default in 20.3. (`9044 &lt;https://github.com/pypa/pip/issues/9044&gt;`_)
- Improve migration guide to reflect changes in new resolver behavior. (`9056 &lt;https://github.com/pypa/pip/issues/9056&gt;`_)
   ```
   
  
</details>


 

<details>
  <summary>Links</summary>
  
  - PyPI: https://pypi.org/project/pip
  - Changelog: https://pyup.io/changelogs/pip/
  - Homepage: https://pip.pypa.io/
</details>



Co-authored-by: pyup-bot <[email protected]>
bors bot referenced this pull request in duckinator/emanate Dec 4, 2020
194: Update pytest-pylint to 0.18.0 r=duckinator a=pyup-bot


This PR updates [pytest-pylint](https://pypi.org/project/pytest-pylint) from **0.17.0** to **0.18.0**.



*The bot wasn't able to find a changelog for this release. [Got an idea?](https://github.com/pyupio/changelogs/issues/new)*

<details>
  <summary>Links</summary>
  
  - PyPI: https://pypi.org/project/pytest-pylint
  - Changelog: https://pyup.io/changelogs/pytest-pylint/
  - Repo: https://github.com/carsongee/pytest-pylint
</details>



197: Update pip to 20.3.1 r=duckinator a=pyup-bot


This PR updates [pip](https://pypi.org/project/pip) from **20.2.4** to **20.3.1**.



<details>
  <summary>Changelog</summary>
  
  
   ### 20.3.1
   ```
   ===================

Deprecations and Removals
-------------------------

- The --build-dir option has been restored as a no-op, to soften the transition
  for tools that still used it. (`9193 &lt;https://github.com/pypa/pip/issues/9193&gt;`_)
   ```
   
  
  
   ### 20.3
   ```
   - Introduce a new ResolutionImpossible error, raised when pip encounters un-satisfiable dependency conflicts (`8546 &lt;https://github.com/pypa/pip/issues/8546&gt;`_, `8377 &lt;https://github.com/pypa/pip/issues/8377&gt;`_)
- Add a subcommand ``debug`` to ``pip config`` to list available configuration sources and the key-value pairs defined in them. (`6741 &lt;https://github.com/pypa/pip/issues/6741&gt;`_)
- Warn if index pages have unexpected content-type (`6754 &lt;https://github.com/pypa/pip/issues/6754&gt;`_)
- Allow specifying ``--prefer-binary`` option in a requirements file (`7693 &lt;https://github.com/pypa/pip/issues/7693&gt;`_)
- Generate PEP 376 REQUESTED metadata for user supplied requirements installed
  by pip. (`7811 &lt;https://github.com/pypa/pip/issues/7811&gt;`_)
- Warn if package url is a vcs or an archive url with invalid scheme (`8128 &lt;https://github.com/pypa/pip/issues/8128&gt;`_)
- Parallelize network operations in ``pip list``. (`8504 &lt;https://github.com/pypa/pip/issues/8504&gt;`_)
- Allow the new resolver to obtain dependency information through wheels
  lazily downloaded using HTTP range requests.  To enable this feature,
  invoke ``pip`` with ``--use-feature=fast-deps``. (`8588 &lt;https://github.com/pypa/pip/issues/8588&gt;`_)
- Support ``--use-feature`` in requirements files (`8601 &lt;https://github.com/pypa/pip/issues/8601&gt;`_)

Bug Fixes
---------

- Use canonical package names while looking up already installed packages. (`5021 &lt;https://github.com/pypa/pip/issues/5021&gt;`_)
- Fix normalizing path on Windows when installing package on another logical disk. (`7625 &lt;https://github.com/pypa/pip/issues/7625&gt;`_)
- The VCS commands run by pip as subprocesses don&#39;t merge stdout and stderr anymore, improving the output parsing by subsequent commands. (`7968 &lt;https://github.com/pypa/pip/issues/7968&gt;`_)
- Correctly treat non-ASCII entry point declarations in wheels so they can be
  installed on Windows. (`8342 &lt;https://github.com/pypa/pip/issues/8342&gt;`_)
- Update author email in config and tests to reflect decommissioning of pypa-dev list. (`8454 &lt;https://github.com/pypa/pip/issues/8454&gt;`_)
- Headers provided by wheels in .data directories are now correctly installed
  into the user-provided locations, such as ``--prefix``, instead of the virtual
  environment pip is running in. (`8521 &lt;https://github.com/pypa/pip/issues/8521&gt;`_)

Vendored Libraries
------------------

- Vendored htmlib5 no longer imports deprecated xml.etree.cElementTree on Python 3.
- Upgrade appdirs to 1.4.4
- Upgrade certifi to 2020.6.20
- Upgrade distlib to 0.3.1
- Upgrade html5lib to 1.1
- Upgrade idna to 2.10
- Upgrade packaging to 20.4
- Upgrade requests to 2.24.0
- Upgrade six to 1.15.0
- Upgrade toml to 0.10.1
- Upgrade urllib3 to 1.25.9

Improved Documentation
----------------------

- Add ``--no-input`` option to pip docs (`7688 &lt;https://github.com/pypa/pip/issues/7688&gt;`_)
- List of options supported in requirements file are extracted from source of truth,
  instead of being maintained manually. (`7908 &lt;https://github.com/pypa/pip/issues/7908&gt;`_)
- Fix pip config docstring so that the subcommands render correctly in the docs (`8072 &lt;https://github.com/pypa/pip/issues/8072&gt;`_)
- replace links to the old pypa-dev mailing list with https://mail.python.org/mailman3/lists/distutils-sig.python.org/ (`8353 &lt;https://github.com/pypa/pip/issues/8353&gt;`_)
- Fix example for defining multiple values for options which support them (`8373 &lt;https://github.com/pypa/pip/issues/8373&gt;`_)
- Add documentation for the ResolutionImpossible error that helps the user fix dependency conflicts (`8459 &lt;https://github.com/pypa/pip/issues/8459&gt;`_)
- Add feature flags to docs (`8512 &lt;https://github.com/pypa/pip/issues/8512&gt;`_)
- Document how to install package extras from git branch and source distributions. (`8576 &lt;https://github.com/pypa/pip/issues/8576&gt;`_)
   ```
   
  
  
   ### 20.3b1
   ```
   ===================

Deprecations and Removals
-------------------------

- ``pip freeze`` will stop filtering the ``pip``, ``setuptools``, ``distribute`` and ``wheel`` packages from ``pip freeze`` output in a future version.
  To keep the previous behavior, users should use the new ``--exclude`` option. (`4256 &lt;https://github.com/pypa/pip/issues/4256&gt;`_)
- Deprecate support for Python 3.5 (`8181 &lt;https://github.com/pypa/pip/issues/8181&gt;`_)
- Document that certain removals can be fast tracked. (`8417 &lt;https://github.com/pypa/pip/issues/8417&gt;`_)
- Document that Python versions are generally supported until PyPI usage falls below 5%. (`8927 &lt;https://github.com/pypa/pip/issues/8927&gt;`_)
- Deprecate ``--find-links`` option in ``pip freeze`` (`9069 &lt;https://github.com/pypa/pip/issues/9069&gt;`_)

Features
--------

- Add ``--exclude`` option to ``pip freeze`` and ``pip list`` commands to explicitly exclude packages from the output. (`4256 &lt;https://github.com/pypa/pip/issues/4256&gt;`_)
- Allow multiple values for --abi and --platform. (`6121 &lt;https://github.com/pypa/pip/issues/6121&gt;`_)
- Add option ``--format`` to subcommand ``list`` of ``pip  cache``, with ``abspath`` choice to output the full path of a wheel file. (`8355 &lt;https://github.com/pypa/pip/issues/8355&gt;`_)
- Improve error message friendliness when an environment has packages with
  corrupted metadata. (`8676 &lt;https://github.com/pypa/pip/issues/8676&gt;`_)
- Make the ``setup.py install`` deprecation warning less noisy. We warn only
  when ``setup.py install`` succeeded and ``setup.py bdist_wheel`` failed, as
  situations where both fails are most probably irrelevant to this deprecation. (`8752 &lt;https://github.com/pypa/pip/issues/8752&gt;`_)
- Check the download directory for existing wheels to possibly avoid
  fetching metadata when the ``fast-deps`` feature is used with
  ``pip wheel`` and ``pip download``. (`8804 &lt;https://github.com/pypa/pip/issues/8804&gt;`_)
- When installing a git URL that refers to a commit that is not available locally
  after git clone, attempt to fetch it from the remote. (`8815 &lt;https://github.com/pypa/pip/issues/8815&gt;`_)
- Include http subdirectory in ``pip cache info`` and ``pip cache purge`` commands. (`8892 &lt;https://github.com/pypa/pip/issues/8892&gt;`_)
- Cache package listings on index packages so they are guarenteed to stay stable
  during a pip command session. This also improves performance when a index page
  is accessed multiple times during the command session. (`8905 &lt;https://github.com/pypa/pip/issues/8905&gt;`_)
- New resolver: Tweak resolution logic to improve user experience when
  user-supplied requirements conflict. (`8924 &lt;https://github.com/pypa/pip/issues/8924&gt;`_)
- Support Python 3.9. (`8971 &lt;https://github.com/pypa/pip/issues/8971&gt;`_)
- Log an informational message when backtracking takes multiple rounds on a specific package. (`8975 &lt;https://github.com/pypa/pip/issues/8975&gt;`_)
- Switch to the new dependency resolver by default. (`9019 &lt;https://github.com/pypa/pip/issues/9019&gt;`_)
- Remove the ``--build-dir`` option, as per the deprecation. (`9049 &lt;https://github.com/pypa/pip/issues/9049&gt;`_)

Bug Fixes
---------

- Propagate ``--extra-index-url`` from requirements file properly to session auth,
  so that keyring auth will work as expected. (`8103 &lt;https://github.com/pypa/pip/issues/8103&gt;`_)
- Allow specifying verbosity and quiet level via configuration files
  and environment variables. Previously these options were treated as
  boolean values when read from there while through CLI the level can be
  specified. (`8578 &lt;https://github.com/pypa/pip/issues/8578&gt;`_)
- Only converts Windows path to unicode on Python 2 to avoid regressions when a
  POSIX environment does not configure the file system encoding correctly. (`8658 &lt;https://github.com/pypa/pip/issues/8658&gt;`_)
- List downloaded distributions before exiting ``pip download``
  when using the new resolver to make the behavior the same as
  that on the legacy resolver. (`8696 &lt;https://github.com/pypa/pip/issues/8696&gt;`_)
- New resolver: Pick up hash declarations in constraints files and use them to
  filter available distributions. (`8792 &lt;https://github.com/pypa/pip/issues/8792&gt;`_)
- Avoid polluting the destination directory by resolution artifacts
  when the new resolver is used for ``pip download`` or ``pip wheel``. (`8827 &lt;https://github.com/pypa/pip/issues/8827&gt;`_)
- New resolver: If a package appears multiple times in user specification with
  different ``--hash`` options, only hashes that present in all specifications
  should be allowed. (`8839 &lt;https://github.com/pypa/pip/issues/8839&gt;`_)
- Tweak the output during dependency resolution in the new resolver. (`8861 &lt;https://github.com/pypa/pip/issues/8861&gt;`_)
- Correctly search for installed distributions in new resolver logic in order
  to not miss packages (virtualenv packages from system-wide-packages for example) (`8963 &lt;https://github.com/pypa/pip/issues/8963&gt;`_)
- Do not fail in pip freeze when encountering a ``direct_url.json`` metadata file
  with editable=True. Render it as a non-editable ``file://`` URL until modern
  editable installs are standardized and supported. (`8996 &lt;https://github.com/pypa/pip/issues/8996&gt;`_)

Vendored Libraries
------------------

- Fix devendoring instructions to explicitly state that ``vendor.txt`` should not be removed.
  It is mandatory for ``pip debug`` command.

Improved Documentation
----------------------

- Add documentation for &#39;.netrc&#39; support. (`7231 &lt;https://github.com/pypa/pip/issues/7231&gt;`_)
- Add OS tabs for OS-specific commands. (`7311 &lt;https://github.com/pypa/pip/issues/7311&gt;`_)
- Add note and example on keyring support for index basic-auth (`8636 &lt;https://github.com/pypa/pip/issues/8636&gt;`_)
- Added initial UX feedback widgets to docs. (`8783 &lt;https://github.com/pypa/pip/issues/8783&gt;`_, `8848 &lt;https://github.com/pypa/pip/issues/8848&gt;`_)
- Add ux documentation (`8807 &lt;https://github.com/pypa/pip/issues/8807&gt;`_)
- Update user docs to reflect new resolver as default in 20.3. (`9044 &lt;https://github.com/pypa/pip/issues/9044&gt;`_)
- Improve migration guide to reflect changes in new resolver behavior. (`9056 &lt;https://github.com/pypa/pip/issues/9056&gt;`_)
   ```
   
  
</details>


 

<details>
  <summary>Links</summary>
  
  - PyPI: https://pypi.org/project/pip
  - Changelog: https://pyup.io/changelogs/pip/
  - Homepage: https://pip.pypa.io/
</details>



Co-authored-by: pyup-bot <[email protected]>
Co-authored-by: Ellen Marie Dash <[email protected]>
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New Resolver: inconsistent output when using cached wheels
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