[issue42332] add __weakref__ to types.GenericAlias

2020-11-17 Thread Guido van Rossum 


Change by Guido van Rossum :


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

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[issue42332] add __weakref__ to types.GenericAlias

2020-11-17 Thread miss-islington 


miss-islington  added the comment:


New changeset 71ba5f52d2a80e7beffc923c54c0b6345cd0637a by kj in branch '3.9':
[3.9] bpo-42332: Add weakref slot to types.GenericAlias (GH-23250) (GH-23309)
https://github.com/python/cpython/commit/71ba5f52d2a80e7beffc923c54c0b6345cd0637a


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[issue42332] add __weakref__ to types.GenericAlias

2020-11-15 Thread Ken Jin 


Change by Ken Jin :


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pull_requests: +22200
pull_request: https://github.com/python/cpython/pull/23309

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[issue42332] add __weakref__ to types.GenericAlias

2020-11-15 Thread miss-islington 


miss-islington  added the comment:


New changeset 384b7a4bd988986bca227c7e85c32d766da74708 by kj in branch 'master':
bpo-42332: Add weakref slot to types.GenericAlias (GH-23250)
https://github.com/python/cpython/commit/384b7a4bd988986bca227c7e85c32d766da74708


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nosy: +miss-islington

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[issue42332] add __weakref__ to types.GenericAlias

2020-11-12 Thread Guido van Rossum 


Guido van Rossum  added the comment:

I think it's reasonable to consider this a bug to be fixed.

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[issue42332] add __weakref__ to types.GenericAlias

2020-11-12 Thread Tin Tvrtković 

Tin Tvrtković  added the comment:

It would be great if we could get this into 3.9.

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[issue42332] add __weakref__ to types.GenericAlias

2020-11-12 Thread Ken Jin 


Change by Ken Jin :


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keywords: +patch
nosy: +kj
nosy_count: 2.0 -> 3.0
pull_requests: +22147
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/23250

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[issue42332] add __weakref__ to types.GenericAlias

2020-11-12 Thread Tin Tvrtković 

New submission from Tin Tvrtković :

For example, dict[int, int] cannot be used with singledispatch because 
types.GenericAlias doesn't support weak references.

I'm an author of a third party library (https://github.com/Tinche/cattrs) for 
which this functionality would be useful.

Here's a similar issue in typing (note that this issue is for 
*types*.GenericAlias) that was fixed: 
https://github.com/python/typing/issues/345

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messages: 380816
nosy: gvanrossum, tinchester
priority: normal
severity: normal
status: open
title: add __weakref__ to types.GenericAlias
type: enhancement
versions: Python 3.10, Python 3.9

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