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Added __class_getitem__ (#4695)
Resolves #4682 Co-authored-by: hauntsaninja <>
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@@ -1,5 +1,9 @@
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import sys
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from typing import Any, Callable, ClassVar, Generic, Iterator, Mapping, TypeVar
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if sys.version_info >= (3, 9):
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from types import GenericAlias
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_T = TypeVar("_T")
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class ContextVar(Generic[_T]):
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@@ -9,6 +13,8 @@ class ContextVar(Generic[_T]):
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def get(self, default: _T = ...) -> _T: ...
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def set(self, value: _T) -> Token[_T]: ...
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def reset(self, token: Token[_T]) -> None: ...
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if sys.version_info >= (3, 9):
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def __class_getitem__(cls, item: Any) -> GenericAlias: ...
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class Token(Generic[_T]):
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@property
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@@ -16,6 +22,8 @@ class Token(Generic[_T]):
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@property
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def old_value(self) -> Any: ... # returns either _T or MISSING, but that's hard to express
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MISSING: ClassVar[object]
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if sys.version_info >= (3, 9):
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def __class_getitem__(cls, item: Any) -> GenericAlias: ...
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def copy_context() -> Context: ...
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