Fix grpc aio handler typing by XiaXia009 · Pull Request #15497 · python/typeshed · GitHub
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Fix grpc aio handler typing #15497

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Fix grpc aio handler typing #15497

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2626c88
Fix grpc aio handler typing
XiaXia009 Mar 9, 2026
ef1a1a1
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Mar 9, 2026
4577db6
Fix grpc aio handler typing
XiaXia009 Mar 9, 2026
357a7fb
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Mar 9, 2026
394c422
fix-grpc-aio-handler
XiaXia009 Mar 9, 2026
855e1a3
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Mar 9, 2026
d81eaf7
fix @type_check_only check
XiaXia009 Mar 9, 2026
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16 changes: 12 additions & 4 deletions stubs/grpcio/@tests/test_cases/check_server_interceptor.py
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16 changes: 15 additions & 1 deletion stubs/grpcio/grpc/aio/__init__.pyi
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Original file line number Diff line number Diff line change
Expand Up @@ -15,7 +15,6 @@ from grpc import (
GenericRpcHandler,
HandlerCallDetails,
RpcError,
RpcMethodHandler,
ServerCredentials,
StatusCode,
_Options,
Expand Down Expand Up @@ -369,6 +368,21 @@ class StreamStreamClientInterceptor(ClientInterceptor, metaclass=abc.ABCMeta):
request_iterator: AsyncIterable[_TRequest] | Iterable[_TRequest],
) -> AsyncIterator[_TResponse] | StreamStreamCall[_TRequest, _TResponse]: ...

# Service-Side Handler:

@type_check_only
class RpcMethodHandler(Generic[_TRequest, _TResponse]):
Comment on lines +373 to +374

@srittau srittau Mar 20, 2026

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Apart from marking non-existing runtime types with @type_check_only, we also prefix them with an underscore to make it very obvious that something is "wrong" with this type to users. I would also like to add some explanation for why this type is here, and add Async to the name to clearly distinguish it from the "regular" RpcMethodHandler:

Suggested change

request_streaming: bool
response_streaming: bool

request_deserializer: _Deserializer[_TRequest] | None
response_serializer: _Serializer[_TResponse] | None

unary_unary: Callable[[_TRequest, ServicerContext[_TRequest, _TResponse]], Awaitable[_TResponse]] | None
unary_stream: Callable[[_TRequest, ServicerContext[_TRequest, _TResponse]], AsyncIterator[_TResponse]] | None
stream_unary: Callable[[AsyncIterator[_TRequest], ServicerContext[_TRequest, _TResponse]], Awaitable[_TResponse]] | None
stream_stream: Callable[[AsyncIterator[_TRequest], ServicerContext[_TRequest, _TResponse]], AsyncIterator[_TResponse]] | None

# Server-Side Interceptor:

class ServerInterceptor(metaclass=abc.ABCMeta):
Expand Down