[issue36492] Deprecate passing some conflicting arguments by keyword

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

Fixes (but not deprecations) were backported to 3.7.

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resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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[issue36492] Deprecate passing some conflicting arguments by keyword

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:


New changeset a37f356de19828241bf19129f804369794c72ed3 by Serhiy Storchaka in 
branch '3.7':
[3.7] bpo-36492: Fix passing special keyword arguments to some functions. 
(GH-12637) (GH-12645)
https://github.com/python/cpython/commit/a37f356de19828241bf19129f804369794c72ed3


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[issue36492] Deprecate passing some conflicting arguments by keyword

[Serhiy Storchaka]

Change by Serhiy Storchaka :


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pull_requests: +12577

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[issue36492] Deprecate passing some conflicting arguments by keyword

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:


New changeset 42a139ed88c487f325a241c6ee8b308b3c045975 by Serhiy Storchaka in 
branch 'master':
bpo-36492: Deprecate passing some arguments as keyword arguments. (GH-12637)
https://github.com/python/cpython/commit/42a139ed88c487f325a241c6ee8b308b3c045975


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[issue36492] Deprecate passing some conflicting arguments by keyword

[Serhiy Storchaka]

Change by Serhiy Storchaka :


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keywords: +patch
pull_requests: +12569
stage:  -> patch review

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[issue36492] Deprecate passing some conflicting arguments by keyword

[Karthikeyan Singaravelan]

Change by Karthikeyan Singaravelan :


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nosy: +xtreak

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[issue36492] Deprecate passing some conflicting arguments by keyword

[Serhiy Storchaka]

New submission from Serhiy Storchaka :

As Steve mentioned in the discussion about PEP 570 [1], some changes of 
parameters to positional-only are breaking (although there is no breaks in the 
stdlib code). Before making parameters positional-only we should add a 
deprecation warning for passing them as keyword arguments. Similarly to the 
code used in the UserDict constructor (see issue22609).

The following PR adds deprecation warnings for other parameters which should be 
positional-only. It also fixes bugs about nonavailability to pass special 
keyword names like "self" or "func". Just one example:

>>> import functools
>>> def f(self, func): pass
... 
>>> functools.partialmethod(f, func=chr)
Traceback (most recent call last):
  File "", line 1, in 
TypeError: __init__() got multiple values for argument 'func'


[1] 
https://discuss.python.org/t/pep-570-python-positional-only-parameters/1078/53

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components: Library (Lib)
messages: 339249
nosy: serhiy.storchaka
priority: normal
severity: normal
status: open
title: Deprecate passing some conflicting arguments by keyword
type: behavior
versions: Python 3.8

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