[issue33419] Add functools.partialclass

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:

I'm -1 on this change. It looks as an uncommon case, and the correct general implementation is hard (it may be even more hard that it looked to me now). The stdlib should't provide an incomplete implementation which can be replaced with just three lines of code in a concrete case if the user doesn't care about subtle details.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue33419>
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