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Union not being recognized as types.UnionType #13810

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Union not being recognized as types.UnionType#13810
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bugmypy got something wrongtopic-pep-604PEP 604 (union | operator)topic-runtime-semanticsmypy doesn't model runtime semantics correctly

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@nickeldan
nickeldan
opened on Oct 4, 2022

In this example,

Foo = str | int
reveal_type(Foo)

mypy (0.990, Python 3.10.6) reveals the type as builtins.object. It should be recognized as types.UnionType (new in Python 3.10).

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  1. nickeldan
    added
    bugmypy got something wrong
    on Oct 4, 2022
  2. JelleZijlstra
    added
    topic-pep-604PEP 604 (union | operator)
    topic-runtime-semanticsmypy doesn't model runtime semantics correctly
    on Oct 4, 2022
  3. karthiknadig
    added a commit that references this issue on Oct 26, 2022

    Fix some errors detected by `mypy` (#100)

    0514416

  4. hauntsaninja commented on Jun 13, 2024

    @hauntsaninja
    hauntsaninja
    on Jun 13, 2024
    Collaborator

    Fixed by #17371

  5. hauntsaninja
    closed this as completedon Jun 13, 2024
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