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Address circular imports complaints by Sphinx 7.2+ #4023

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merged 5 commits into from
Aug 23, 2023

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abravalheri
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Summary of changes

The latest version of sphinx started failing in #4020 (comment) due to circular imports.

Examples of the error messages are:

ImportError: cannot import name 'Distribution' from partially initialized module 'setuptools.dist'

AttributeError: partially initialized module 'setuptools' has no attribute 'version' (most likely due to a circular import)

Failed to import class 'Command' from module 'setuptools'

In this PR, I am attempting to address this problem.

The approach I used was:

  • Rewrite the imports in setuptools/__init__.py, setuptools/monkey.py and setuptools/dist.py to avoid circular imports.
    • I also took this chance to try to tide up a bit (e.g. sorting them, separating import ... and from ... import ... statements, etc)
  • I had to change slightly the way we are importing setuptools.extern.packaging and setuptools/depends.py and setuptools/tests/test_setuptools.py because for some reason the tests where complaining that the Version class was differing from itself (maybe the module is loaded twice?)

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Pull Request Checklist

@abravalheri abravalheri marked this pull request as ready for review August 18, 2023 13:12
henryiii added a commit to scikit-build/scikit-build-core that referenced this pull request Aug 21, 2023
Temporary fix while waiting for
pypa/setuptools#4023.

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>
henryiii pushed a commit to scikit-build/scikit-build-core that referenced this pull request Aug 21, 2023
pypa/setuptools#4023 Fixes the issue

Signed-off-by: Cristian Le <cristian.le@mpsd.mpg.de>
Somehow before this change the tests were failing because the ``Version`` class
imported in the tests was different from the ``Version`` class produced
in the code under test.
@abravalheri
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Since the problem with sphinx seems to be impacting other users, I will go ahead and merge this as soon as the CI is green (but I will not immediately publish a new release). Hopefully it is just some refactoring that does not impact negatively the project.

@abravalheri abravalheri merged commit 2733fc3 into pypa:main Aug 23, 2023
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@abravalheri abravalheri deleted the circular-imports branch August 23, 2023 11:08
abravalheri added a commit to abravalheri/setuptools that referenced this pull request Aug 29, 2023
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