Enum does not work if member is an instance of types.GenericAlias · Issue #93847 · python/cpython (original) (raw)

Skip to content

Navigation Menu

• • GitHub Copilot Write better code with AI
  • GitHub Advanced Security Find and fix vulnerabilities
  • Actions Automate any workflow
  • Codespaces Instant dev environments
  • Issues Plan and track work
  • Code Review Manage code changes
  • Discussions Collaborate outside of code
  • Code Search Find more, search less
• Explore
  • Learning Pathways
  • Events & Webinars
  • Ebooks & Whitepapers
  • Customer Stories
  • Partners
  • Executive Insights
• • GitHub Sponsors Fund open source developers
  • The ReadME Project GitHub community articles
• • Enterprise platform AI-powered developer platform
• Pricing

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Sign up

Description

Enums does not work with generic alias of builtin types, like list[int].

>>> class E(enum.Enum):
...     L = list[int]
... 
>>> E.L
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/serhiy/py/cpython/Lib/enum.py", line 1241, in __repr__
    return "<%s.%s: %s>" % (self.__class__.__name__, self._name_, v_repr(self._value_))
                                                                  ^^^^^^^^^^^^^^^^^^^^
TypeError: descriptor '__repr__' requires a 'type' object but received a 'types.GenericAlias'

All works with typing.List[int].

>>> class E(enum.Enum):
...     L = List[int]
... 
>>> E.L
<E.L: typing.List[int]>

This is a manifestation of the #89828 bug.