See also#82062: we could fix that issue in a similar approach, using__objclass__.__module__ to set the__module__ attribute. Right now for built-in instance methods its missing (c.f. pure-python classes):

>>>int.to_bytes.__module__Traceback (most recent call last):  File "<stdin>", line 1, in <module>AttributeError: 'method_descriptor' object has no attribute '__module__'. Did you mean: '__reduce__'?

CC@serhiy-storchaka

class methods

Hmm, I don't see ways to speedup this. Maybe solution is just to pay this price at time ofaccess the__module__ attribute.

only for static methods loses purpose

Why? Something meaningful is better than justNone.

CC@vstinner

I clicked on [Update branch] since this PR was created many months ago.