fix: Update __exit__ method to use Optional types#733
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belono
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Jun 7, 2026
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Hi @AustinZhang1024 !
From contextmanager.__exit__(exc_type, exc_val, exc_tb)
If an exception occurred while executing the body of the with statement, the arguments contain the exception type, value and traceback information. Otherwise, all three arguments are
None.
You are right, if no exception is raised when exiting a context manager then all three arguments will be None, so their types should be Optional.
Thanks!
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Description
From the newest document, better to allow
Nonein the type hint.This will fix the invalid-context-manager error of ty.
Tested with
Windows 11