allow None

Author: beauxq

stdlib/contextlib.pyi

@@ -147,7 +147,7 @@ class _SupportsRedirect(Protocol):
     def write(self, s: str, /) -> int: ...
     def flush(self) -> None: ...
 
-_SupportsRedirectT = TypeVar("_SupportsRedirectT", bound=_SupportsRedirect)
+_SupportsRedirectT = TypeVar("_SupportsRedirectT", bound=_SupportsRedirect | None)
 
 class _RedirectStream(AbstractContextManager[_SupportsRedirectT, None]):
     def __init__(self, new_target: _SupportsRedirectT) -> None: ...