8000 Fix `typing.TypeAliasType` being undefined on python < 3.12 by sobolevn · Pull Request #17558 · python/mypy · GitHub
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Fix typing.TypeAliasType being undefined on python < 3.12 #17558

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merged 2 commits into from
Jul 22, 2024
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Fix typing.TypeAliasType being undefined on python < 3.12 #17558

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adb4673
Fix `typing.TypeAliasType` being undefined on python < 3.12
sobolevn Jul 22, 2024
0db0b48
Fix CI
sobolevn Jul 22, 2024
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Fix CI
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@sobolevn
sobolevn committed Jul 22, 2024
commit 0db0b481689cf2723689fc43345a69f4309f3ca2
4 changes: 2 additions & 2 deletions test-data/unit/check-type-aliases.test
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Expand Up @@ -1074,7 +1074,7 @@ x: TestType = 42
y: TestType = 'a'
z: TestType = object() # E: Incompatible types in assignment (expression has type "object", variable has type "Union[int, str]")

reveal_type(TestType) # N: Revealed type is "typing.TypeAliasType"
reveal_type(TestType) # N: Revealed type is "typing_extensions.TypeAliasType"
TestType() # E: "TypeAliasType" not callable

class A:
Expand All @@ -1086,7 +1086,7 @@ yc: A.ClassAlias = "" # E: Incompatible types in assignment (expression has typ

[case testTypeAliasTypePython311]
# flags: --python-version 3.11
# Pinning to 3.11, because 3.12 have `TypeAliasType`
# Pinning to 3.11, because 3.12 has `TypeAliasType`
from typing_extensions import TypeAliasType

TestType = TypeAliasType("TestType", int)
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