Description

sobolevn

opened on Jun 8, 2023

Issue body actions

Repro:

>>> type A[X] = list[X]
>>> dir(A[int])
[..., '__copy__', '__deepcopy__', ...]

We can access all other attributes, but not __copy__ and __deepcopy__:

>>> A[int].__copy__
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'types.GenericAlias' object has no attribute '__copy__'. Did you mean: '__doc__'?

>>> A[int].__deepcopy__
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'types.GenericAlias' object has no attribute '__deepcopy__'

I am not quite sure what is the right thing to do here 🤔

Linked PRs

• gh-105487: Fix __dir__ entries of GenericAlias #138578
• [3.14] gh-105487: Fix __dir__ entries of GenericAlias (GH-138578) #138629
• [3.13] gh-105487: Fix __dir__ entries of GenericAlias (GH-138578) #138640

Activity

1. sobolevn

   added

   type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

   topic-typing

   on Jun 8, 2023
2. sobolevn

   added a commit that references this issue on Jun 8, 2023

   pythongh-105487: Change the `repr` of `ParamSpec` list of args in `Ge…

   3402de9
3. hugovk commented on Nov 10, 2023

   

   hugovk

   on Nov 10, 2023

   Member

   More actions

   Thanks for the fix!
4. hugovk

   closed this as completedon Nov 10, 2023
5. asottile-sentry commented on Sep 5, 2025

   

   asottile-sentry

   on Sep 5, 2025

   More actions

   a little late to the party but __bases__ appears to not work as well:

   >>> '__bases__' in dir(list[str])
   True
   >>> list[str].__bases__
   Traceback (most recent call last):
     File "<python-input-15>", line 1, in <module>
       list[str].__bases__
   AttributeError: 'types.GenericAlias' object has no attribute '__bases__'. Did you mean: '__args__'?
6. sobolevn

   reopened this on Sep 6, 2025
7. sobolevn

   added a commit that references this issue on Sep 6, 2025

   pythongh-105487: Fix `__dir__` entries of `GenericAlias`

   110e6b0
8. sobolevn commented on Sep 6, 2025

   

   sobolevn

   on Sep 6, 2025

   MemberAuthor

   More actions

   Looks like the linked PR does something completely different. I created a new one.
9. sobolevn commented on Sep 6, 2025

   

   sobolevn

   on Sep 6, 2025

   MemberAuthor

   More actions

   Thanks for the report!
10. picnixz

    added

    interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

    on Sep 6, 2025
11. sobolevn

    added 2 commits that reference this issue on Sep 6, 2025

    pythongh-105487: Fix `__dir__` entries of `GenericAlias`

    1eac463

    gh-105487: Fix `__dir__` entries of `GenericAlias` (#138578)

    b0420b5
12. miss-islington

    added a commit that references this issue on Sep 7, 2025

    pythongh-105487: Fix `__dir__` entries of `GenericAlias` (pythonGH-13…

    200f76f
13. sobolevn

    added 2 commits that reference this issue on Sep 8, 2025

    [3.13] pythongh-105487: Fix `__dir__` entries of `GenericAlias` (pyth…

    ee40172

    [3.13] gh-105487: Fix `__dir__` entries of `GenericAlias` (GH-138578) (…

    d3b6bb1
14. lkollar

    added a commit that references this issue on Sep 9, 2025

    pythongh-105487: Fix `__dir__` entries of `GenericAlias` (python#138578)

    b42938b
15. encukou

    added a commit that references this issue on Oct 7, 2025

    [3.14] gh-105487: Fix `__dir__` entries of `GenericAlias` (GH-138578) (…

    09fdd21
16. hugovk

    closed this as completedon Jul 24, 2026

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