[issue17159] Remove explicit type check from inspect.Signature.from_function()

[Stefan Behnel]

Stefan Behnel added the comment:

BTW, ismethoddescriptor() is an exceedingly broad test, IMHO. I wonder if it should even be relied upon for anything in inspect.py.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17159>
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