Bug report

A clear and concise description of what the bug is.
Include a minimal, reproducible example (https://stackoverflow.com/help/minimal-reproducible-example), if possible.

I don't know how to describe this bug, see

The problem is with the following code:

    @staticmethod
    def normalize(name):
        """
        PEP 503 normalization plus dashes as underscores.
        """
        return re.sub(r"[-_.]+", "-", name).lower().replace('-', '_')

The fixes are as follows:

Guess the reason is that in some cases, name may be a None, if no judgment is made, an exception will always be thrown under certain conditions, which causes an exception in my gentoo regardless of any python3.10 library installed

Your environment

gentoo/Linux