grpc官方地址：https://grpc.github.io/grpc/python/index.html

1. grpcio自带的aio

https://grpc.github.io/grpc/python/grpc_asyncio.html

2. 直接使用proto文件

https://github.com/grpc/grpc/tree/master/examples/python/no_codegen

3. grpclib

https://github.com/vmagamedov/grpclib

3.1 proto

syntax = "proto3";
option go_package = ".;proto";
service Greeter{
  rpc SayHello(HelloRequest) returns (HelloReply);
}
message HelloRequest{
  string name = 1;
}
message HelloReply{
  string message = 1;
}

3.2 生成python源码

pip install grpclib -i https://pypi.douban.com/simple  #通过豆瓣镜像安装
python -m grpc_tools.protoc --python_out=. --grpclib_python_out=. -I. helloworld.proto

3.3 服务端

import asyncio
from grpclib.utils import graceful_exit
from grpclib.server import Server
# generated by protoc
from .helloworld_pb2 import HelloReply
from .helloworld_grpc import GreeterBase
class Greeter(GreeterBase):
    async def SayHello(self,stream):
        request = await stream.recv_message() 
        message = f'Hello,{request.name}!'
        await stream.send_message(HelloReply(message=message))
async def main(*, host='127.0.0.1', port=50051):
    server = Server([Greeter()])
    # Note: graceful_exit isn't supported in Windows
    await server.start(host,port)
    print(f'Serving on {host}:{port}')
    await server.wait_closed()
if __name__ == "__main__":
    asyncio.run(main())

3.4 客户端

import asyncio
from grpclib.client import Channel
# generated by protoc
from .helloworld_pb2 import HelloRequest, HelloReply
from .helloworld_grpc import GreeterStub
async def main():
    async with Channel('127.0.0.1', 50051) as channel:
        greeter = GreeterStub(channel)
        reply = await greeter.SayHello(HelloRequest(name="Dr.Strange"))
        print(reply.message)
if __name__ == '__main__':
    asyncio.run(main())