[issue10049] Add a "no-op" (null) context manager to contextlib

[STINNER Victor]

STINNER Victor <victor.stinner at haypocalc.com> added the comment:

About your patch:
 - __enter__() might return self instead of None... i don't really know which choice is better. "with Null() as x:" works in both cases
 - __exit__() has no result value, "pass" is enough
 - I don't like "Null" name, I prefer "Noop" (NoOperation, NoOp, ...) or something else

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nosy: +haypo

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