[issue33388] Support PEP 566 metadata in dist.py

[Nick Coghlan]

Nick Coghlan <ncoghlan at gmail.com> added the comment:

If these warnings are being emitted when using setuptools, that's a bug in setuptools (as it should be ensuring these are handled without warnings), and can be reported over on https://github.com/pypa/setuptools/

If these warnings are being emitted when using plain distutils, that's OK, since it genuinely doesn't support them (and folks should be using setuptools instead).

Longer term, we want to get setuptools to the point of being independent of the standard library's copy of distutils: https://github.com/pypa/packaging-problems/issues/127

Once that's the case, then we'll look at the exact mechanics of how we can stop shipping distutils by default in the standard library (and instead require folks to install setuptools in order to get it).

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