Extend contextmanager to asynccontextmanager #11352
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tushar-deepsource
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Jan 20, 2022
Closes python#9922 ### Description Extending the existing special case for `contextlib.contextmanager` to `contextlib.asynccontextmanager`. When used with `TypeVar` gives much better type. ## Test Plan I hope I have included the unit test you need. My minimal reproduction is: ``` from contextlib import asynccontextmanager from typing import AsyncGenerator, Type, TypeVar R = TypeVar("R") @asynccontextmanager async def foo( cls: Type[R], ) -> AsyncGenerator[R, None]: yield cls() async def bar() -> int: async with foo(int) as foo_int: return ( foo_int # error: Incompatible return value type (got "R", expected "int") ) ```
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Closes #9922
Description
Extending the existing special case for
contextlib.contextmanagertocontextlib.asynccontextmanager. When used withTypeVargives much better type.Test Plan
I hope I have included the unit test you need. My minimal reproduction is: