Fixed a bug that easy install incorrectly parsed Python 3.10 version string

[liuzhe-lz]

Summary of changes

Fixed a bug that easy install incorrectly parsed Python 3.10 version string.

Pull Request Checklist

• Changes have tests
• News fragment added in changelog.d/.
  (See documentation for details)

[jaraco]

Looks like this bug was reported in #3001.

Can you add a test?

[liuzhe-lz]

Looks like this bug was reported in #3001.

Can you add a test?

Sorry I don't have time for now.
Maybe you can help add one. Or I can do it sometime next week.

[abravalheri]

As the existing tests are not running properly, I think the best here would be an update... So here it goes:

@Mergifyio update

[mergify]

update

✅ Branch has been successfully updated

[abravalheri]

Hi @liuzhe-lz, @jaraco I added some tests to the proposed fix. Please feel free to remove it, change or add any other tests.

(I also reordered a bit the commits, because I wanted to see the test failing before the fix is applied and study how to better represent the situation in #3001).

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Notes:

I noticed the stdlib version of distutils sometimes create a path that contains a literal string 'None', which seems to be a bug already solved in the vendored version.

Another thing that I noticed is that for Windows 3.10, there might be a ValueError: invalid variable 'py_version_nodot_plat', which I guess is already solved by pypa/distutils@1560a1f and will be eventually pulled into setuptools.

[jaraco]

Thanks everyone!