fix: Make context manager __exit__/__aexit__ signatures compatible with typing protocols#2915
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mxschmitt merged 1 commit intomicrosoft:mainfrom Jul 10, 2025
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…th typing protocols Updates AsyncContextManager.__aexit__ and SyncContextManager.__exit__ to use Optional types for exception parameters (exc_type, exc_val, traceback) to match the standard Python typing protocols. This aligns with the official type definitions in typeshed where AbstractContextManager and AbstractAsyncContextManager define these parameters as Optional since they are None when no exception occurs. Ref: https://github.com/python/typeshed/blob/9317dc62bd4fb46b8b48ce5353286cab80308d47/stdlib/contextlib.pyi#L52-L54 Fixes type checker compatibility issues when using BrowserContext with type checkers that enforce strict protocol compliance.
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Updates
AsyncContextManager.__aexit__andSyncContextManager.__exit__to use Optional types for exception parameters (exc_type, exc_val, traceback) to match the standard Python typing protocols.This aligns with the official type definitions in typeshed where AbstractContextManager and AbstractAsyncContextManager define these parameters as Optional since they are None when no exception occurs.
Ref: https://github.com/python/typeshed/blob/9317dc62bd4fb46b8b48ce5353286cab80308d47/stdlib/contextlib.pyi#L52-L54
Fixes type checker compatibility issues when using BrowserContext with type checkers that enforce strict protocol compliance.
Fixes #2856