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multiprocessing manager classes DictProxy and ListProxy don't support typing in 3.11.4 #107431

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TheMythologist opened this issue Jul 29, 2023 · 1 comment · Fixed by #107433
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multiprocessing manager classes DictProxy and ListProxy don't support typing in 3.11.4 #107431

TheMythologist opened this issue Jul 29, 2023 · 1 comment · Fixed by #107433
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topic-multiprocessing topic-typing type-feature A feature request or enhancement

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@TheMythologist
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TheMythologist commented Jul 29, 2023 •
edited by bedevere-bot
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Bug report

DictProxy and ListProxy classes from multiprocessing.managers do not support generic annotations.

Minimal reproducible example for DictProxy:

from multiprocessing.managers import DictProxy
from multiprocessing import Manager

d: DictProxy[str, float] = Manager().dict()

Error:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: type 'DictProxy' is not subscriptable

Similar for ListProxy

Side note: #99509 appears to still be an issue as well

Your environment

Python 3.11.4 (tags/v3.11.4:d2340ef, Jun 7 2023, 05:45:37) [MSC v.1934 64 bit (AMD64)] on win32

Linked PRs
@TheMythologist TheMythologist added the type-bug An unexpected behavior, bug, or error label Jul 29, 2023
sobolevn added a commit to sobolevn/cpython that referenced this issue Jul 29, 2023
@sobolevn
pythongh-107431: Make `multiprocessing.managers.{DictProxy,ListProxy}…
3f865c5 
…` generic
@bedevere-bot bedevere-bot mentioned this issue Jul 29, 2023
Merged
@sobolevn sobolevn added type-feature A feature request or enhancement and removed type-bug An unexpected behavior, bug, or error labels Jul 29, 2023
@sobolevn
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For older versions you can use 'DictProxy[A, B]', it will work, because these classes are generic in typeshed :)

@TheMythologist TheMythologist mentioned this issue Jul 30, 2023
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gpshead added a commit that referenced this issue Nov 10, 2023
@sobolevn @AlexWaygood @gpshead
gh-107431: Make multiprocessing.managers.{DictProxy,ListProxy} gene…
ae8116c 
…ric (#107433)

Make `multiprocessing.managers.{DictProxy,ListProxy}` generic for type annotation use.  `ListProxy[str]` for example.

Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
Co-authored-by: Gregory P. Smith <greg@krypto.org>
aisk pushed a commit to aisk/cpython that referenced this issue Feb 11, 2024
@sobolevn @AlexWaygood
@gpshead @aisk
pythongh-107431: Make `multiprocessing.managers.{DictProxy,ListProxy}…
319a2b5 
…` generic (python#107433)

Make `multiprocessing.managers.{DictProxy,ListProxy}` generic for type annotation use.  `ListProxy[str]` for example.

Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
Co-authored-by: Gregory P. Smith <greg@krypto.org>
Glyphack pushed a commit to Glyphack/cpython that referenced this issue Sep 2, 2024
@sobolevn @AlexWaygood
@gpshead @Glyphack
pythongh-107431: Make `multiprocessing.managers.{DictProxy,ListProxy}…
e6a98d3 
…` generic (python#107433)

Make `multiprocessing.managers.{DictProxy,ListProxy}` generic for type annotation use.  `ListProxy[str]` for example.

Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
Co-authored-by: Gregory P. Smith <greg@krypto.org>
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topic-multiprocessing topic-typing type-feature A feature request or enhancement
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gh-107431: Make multiprocessing.managers.{DictProxy,ListProxy} generic sobolevn/cpython
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@sobolevn @TheMythologist @AlexWaygood