types-grpcio

import grpc from typing import cast # To make this example runnable, you would typically have: # 1. A .proto file defining a service (e.g., helloworld.proto) # 2. Generated Python code for the service (e.g., helloworld_pb2.py, helloworld_pb2_grpc.py) # using `python -m grpc_tools.protoc ...` def demonstrate_typing(): # types-grpcio provides type hints for grpc functions and objects. # For instance, `grpc.insecure_channel` is correctly typed. channel: grpc.Channel = grpc.insecure_channel('localhost:50051') print(f"Successfully created a gRPC channel: {type(channel).__name__}") # With types-grpcio, static analysis tools like MyPy can verify # that `channel` is indeed a `grpc.Channel` object and that its methods are correct. # Example (would require generated stubs for full type checking): # from helloworld_pb2_grpc import GreeterStub # stub: GreeterStub = GreeterStub(channel) # print("Type hints for gRPC stub are available.") channel.close() if __name__ == '__main__': demonstrate_typing() # To verify types with MyPy: # 1. Ensure `grpcio`, `types-grpcio`, and `mypy` are installed: # `pip install grpcio types-grpcio mypy` # 2. Run MyPy on this file: # `mypy your_script_name.py` # MyPy should report no errors for the `grpc` types.