The setuptools 45 wheel has an incorrect py2.py3 tag

[sbidoul]

Arriving from pypa/pip#7610.

The wheel for setuptools 45 on PyPI has the py2.py3 tag in its file name.

Since that version does not support python 2 it should have the py3 tag.

[jaraco]

I have several concerns with the proposed solution (#1977, #1978) to remove the 'universal' indicator.

• The indicator is meant to indicate the applicability of the package to the wheel to the target platform, and since this wheel does still have Python 2 compatibility in the source, it's technically still correct to advertise the wheel as universal.
• The fact that pip happens to use this setting as a proxy for applicable packages in find-links (and ignores python-requires) feels like a bit of a hack.
• This package does correctly declare its Python support in two ways (through Requires-Python and through Trove classifiers), so this is a third way to declare the package's Python support.

And if you loop in #1972, this requirement demands that moving a package from Python 2/3 support to Python 3-only support requires many changes:

• update python_requires
• remove Python 2 from Trove classifiers
• add Python 3 Only to Trove classifiers
• drop universal wheel

That seems like a awful lot of (redundant) steps for a single operation. It's enough work with enough opportunities to get it wrong that it probably demands some documentation. I'll implement these changes in my jaraco/skeleton project to apply to the other projects I maintain that have dropped Python 2 support.

[jaraco]

Fixed with #1978.