如何用Python搭建gRPC服务

syntax = "proto3";
​
option cc_generic_services = true;
​
//定义服务接口
service GrpcService {
    rpc hello (HelloRequest) returns (HelloResponse) {}  //一个服务中可以定义多个接口，也就是多个函数功能
}
​
//请求的参数
message HelloRequest {
    string data = 1;   //数字1,2是参数的位置顺序，并不是对参数赋值
    Skill skill = 2;  //支持自定义的数据格式，非常灵活
};
​
//返回的对象
message HelloResponse {
    string result = 1;
    map<string, int32> map_result = 2; //支持map数据格式，类似dict
};
​
message Skill {
    string name = 1;
};

#! /usr/bin/env python
# coding=utf8
​
import time
from concurrent import futures
​
import grpc
​
from gRPC_example import hello_pb2_grpc, hello_pb2
​
_ONE_DAY_IN_SECONDS = 60 * 60 * 24
​
​
class TestService(hello_pb2_grpc.GrpcServiceServicer):
    '''
    继承GrpcServiceServicer,实现hello方法
    '''
    def __init__(self):
        pass
​
    def hello(self, request, context):
        '''
        具体实现hello的方法，并按照pb的返回对象构造HelloResponse返回
        :param request:
        :param context:
        :return:
        '''
        result = request.data + request.skill.name + " this is gprc test service"
        list_result = {"12": 1232}
        return hello_pb2.HelloResponse(result=str(result),
                                       map_result=list_result)
​
def run():
    '''
    模拟服务启动
    :return:
    '''
    server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))
    hello_pb2_grpc.add_GrpcServiceServicer_to_server(TestService(),server)
    server.add_insecure_port('[::]:50052')
    server.start()
    print("start service...")
    try:
        while True:
            time.sleep(_ONE_DAY_IN_SECONDS)
    except KeyboardInterrupt:
        server.stop(0)
​
​
if __name__ == '__main__':
    run()

#! /usr/bin/env python
# coding=utf8
​
import grpc
​
from gRPC_example import #! /usr/bin/env python
# coding=utf8
​
import grpc
​
from gRPC_example import hello_pb2_grpc, hello_pb2
​
​
def run():
    '''
    模拟请求服务方法信息
    :return:
    '''
    conn=grpc.insecure_channel('localhost:50052')
    client = hello_pb2_grpc.GrpcServiceStub(channel=conn)
    skill = hello_pb2.Skill(name="engineer")
    request = hello_pb2.HelloRequest(data="xiao gang", skill=skill)
    respnse = client.hello(request)
    print("received:",respnse.result)
​
​
if __name__ == '__main__':
    run()
​
​
def run():
    '''
    模拟请求服务方法信息
    :return:
    '''
    conn=grpc.insecure_channel('localhost:50052')
    client = hello_pb2_grpc.GrpcServiceStub(channel=conn)
    skill = hello_pb2.Skill(name="engineer")
    request = hello_pb2.HelloRequest(data="xiao gang", skill=skill)
    response = client.hello(request)
    print("received:",response.result)
​
​
if __name__ == '__main__':
    run()