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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#) https://grpc.io/
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grpc/examples/python/data_transmission
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README.en.md

Data transmission demo for using gRPC in Python

Four ways of data transmission when gRPC is used in Python. Official Guide

  • unary-unary

    In a single call, the client can only send request once, and the server can only respond once.

    client.py: simple_method

    server.py: SimpleMethod

  • stream-unary

    In a single call, the client can transfer data to the server an arbitrary number of times, but the server can only return a response once.

    client.py: client_streaming_method

    server.py: ClientStreamingMethod

  • unary-stream

    In a single call, the client can only transmit data to the server at one time, but the server can return the response many times.

    client.py: server_streaming_method

    server.py: ServerStreamingMethod

  • stream-stream

    In a single call, both client and server can send and receive data to each other multiple times.

    client.py: bidirectional_streaming_method

    server.py: BidirectionalStreamingMethod