mirror of https://github.com/pypa/pip
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@ -1031,8 +1031,9 @@ an optional ``--unstable-feature=resolver`` flag). pip 20.2 includes a
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robust beta of the new resolver (hidden behind an optional
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``--use-feature=2020-resolver`` flag) that we encourage you to
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test. We will continue to improve the pip dependency resolver in
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response to testers' feedback. This will help us prepare to release
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pip 20.3, with the new resolver on by default, in October.
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response to testers' feedback. Please give us feedback through the
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`resolver testing survey`_. This will help us prepare to release pip
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20.3, with the new resolver on by default, in October.
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Watch out for
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-------------
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@ -1099,11 +1100,20 @@ How to test
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``pip check`` and run into stuff you can’t figure out, please `ask
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for help in our issuetracker or chat <https://pip.pypa.io/>`__.
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3. **Test the new version of pip** (see below). While we have tried to
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make sure that pip’s test suite covers as many cases as we can, we
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are very aware that there are people using pip with many different
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workflows and build processes, and we will not be able to cover all
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of those without your help.
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3. **Test the new version of pip** (see below). To test the new
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resolver, use the ``--use-feature=2020-resolver`` flag, as in:
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``pip install example --use-feature=2020-resolver``
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The more feedback we can get, the more we can make sure that the
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final release is solid. (Only try the new resolver **in a
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non-production environment**, though - it isn't ready for you to
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rely on in production!)
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While we have tried to make sure that pip’s test suite covers as
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many cases as we can, we are very aware that there are people using
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pip with many different workflows and build processes, and we will
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not be able to cover all of those without your help.
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- If you use pip to install your software, try out the new resolver
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and let us know if it works for you with ``pip install``. Try:
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@ -1125,7 +1135,7 @@ How to test
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deliver part of your functionality, please test your integration
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with pip 20.2.
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Please report bugs [GitHub link or something else TKTK].
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4. **Please report bugs** through the `resolver testing survey`_.
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Setups we might need more testing on
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------------------------------------
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@ -1142,17 +1152,71 @@ Setups we might need more testing on
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* Requirements files with 100+ packages
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* Installing a package that has multiple requirements files
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* Requirements files that include hashes or pinned dependencies (perhaps as output from ``pip-compile`` or ``pip-tools``)
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* Continuous integration/continuous deployment setups
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* Installing from any kind of version control systems (i.e., Git, Subversion, Mercurial, or CVS)
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* Installing from any kind of version control systems (i.e., Git, Subversion, Mercurial, or CVS), per :ref:`VCS Support`
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* Installing from source code held in local directories
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* Using the most recent versions of Python 3.6, 3.7, 3.8, and 3.9
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* PyPy
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* Customized terminals (where you have modified how error messages and standard output display)
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Examples to try
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^^^^^^^^^^^^^^^
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Install:
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* `tensorflow`_
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* ``hacking``
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* ``pycodestyle``
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* ``pandas``
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* ``tablib``
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* ``elasticsearch`` and ``requests`` together
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* ``six`` and ``cherrypy`` together
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* ``pip install flake8-import-order==0.17.1 flake8==3.5.0 --use-feature=2020-resolver``
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* ``pip install tornado==5.0 sprockets.http==1.5.0 --use-feature=2020-resolver``
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Try:
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* ``pip install``
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* ``pip uninstall``
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* ``pip check``
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* ``pip cache``
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Tell us about
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-------------
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Specific things we'd love to get feedback on:
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* Cases where the new resolver produces the wrong result,
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obviously. We hope there won't be too many of these, but we'd like
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to trap such bugs now.
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* Cases where the resolver produced an error when you believe it
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should have been able to work out what to do.
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* Cases where the resolver gives an error because there's a problem
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with your requirements, but you need better information to work out
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what's wrong.
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* If you have workarounds to address issues with the current resolver,
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does the new resolver let you remove those workarounds? Tell us!
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Context and followup
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--------------------
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As discussed in `our announcement on the PSF blog`_, the pip team are in the process of developing a new "dependency resolver" (the part of pip that works out what to install based on your requirements). We have reached a major milestone in this work, and have a testable ("beta") version of the resolver, which you can test, included in this release.
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.. _freeze: https://pip.pypa.io/en/latest/reference/pip_freeze/
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.. _resolver testing survey: https://tools.simplysecure.org/survey/index.php?r=survey/index&sid=989272&lang=en
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.. _our announcement on the PSF blog: http://pyfound.blogspot.com/2020/03/new-pip-resolver-to-roll-out-this-year.html
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.. _tensorflow: https://pypi.org/project/tensorflow/
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