// [python quickstart](https://grpc.io/docs/quickstart/python.html#run-a-grpc-application)
// python -m grpc_tools.protoc --python_out=. --grpc_python_out=. -I. classify.proto

// 选择类型
syntax = "proto3";

service classify {
    rpc Classify(ClassifyRequest) returns (ClassifyReply) {}
}

message ClassifyRequest {
    string keyword = 1;
}

message ClassifyReply {
    string message = 1;
}