DistributionNotFound for typing-extensions with Python 3.10

[williamjmorenor]

Hello with python 3.10 alpha looks like there is a issue with the version check of importlib_metadata

'typing-extensions>=3.6.4; python_version < "3.8"' distribution was not found and is required by importlib-metadata

Look like comparing "3.10" > "3.8" is returning False in some place.

References:

• DistributionNotFound for typing-extensions with Python 3.10 pypa/twine#724
• 'typing-extensions>=3.6.4; python_version < "3.8"' distribution was not found and is required by importlib-metadata pypa/build#201

[FFY00]

As I said in the pypa/build issue, this looks like an issue in twine. importlib_metadata should have nothing to do with it.

[sigmavirus24]

@FFY00 You're saying twine shouldn't use importlib_metadata?

[layday]

No, he's saying that the issue does not originate from (or manifest in) importlib_metadata. twine uses pkg_resources to load its commands from setuptools entry points and pkg_resources for some reason attempts to validate that dependencies are met and chokes on python_version < "3.8" when the python_version is 3.10. The issue in twine could be obviated by using importlib-metadata, which it already depends on, to load its entry points.

[bhrutledge]

I believe this can be closed, as the underlying exception reported by Twine can be resolved by upgrading to setuptools>=49.0.0, as detailed at pypa/twine#724 (comment).

[jaraco]

Thanks all for working through the challenges here.