[issue13585] Add contextlib.ExitStack

[Jeroen Demeyer]

Jeroen Demeyer <J.Demeyer at UGent.be> added the comment:

Why this?

_exit_wrapper.__self__ = cm

It seems that you are trying to create something which is exactly like a method except that it's not a method. Is there any reason to not use an actual method? It would actually simplify the code.

I ask because assigning __self__ might break after PEP 575.

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nosy: +jdemeyer

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