[issue40897] Inheriting from class that defines __new__ causes inspect.signature to always return (*args, **kwargs) for constructor

[Łukasz Langa]

Łukasz Langa <lukasz at langa.pl> added the comment:

On second thought it's a bummer not to fix this in 3.9.x that will still be the only stable version until October. I'll refactor the relevant part of inspect.py in 3.9 to make the backport applicable.

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<https://bugs.python.org/issue40897>
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