Python：UDP套接字如何等待客户端回复字节字符串

Question

import socketserver
import struct
from collections import namedtuple

class MyUDPHandler(socketserver.BaseRequestHandler):
    def handle(self):
        data = self.request[0].strip()
        socket = self.request[1]
        if len(data) >= 34:
            format_ = "6shhih50s2s"
            MyStruct = namedtuple("MyStruct", "sMark nPackLen nFlag nGisIp nPort sData sEnd")
            tuple_to_send = MyStruct(sMark="\r\n{}".format("*KW").encode("ascii"), 
                     nPackLen=struct.calcsize(format_),
                     nFlag=0x0002,
                     nGisIp=0,
                     nPort=0,
                     sData= "*KW,AA05954122,015,080756,#".encode("ascii"),
                     sEnd="\r\n".encode("ascii"))
            string_to_send = struct.pack(format_, *tuple_to_send._asdict().values())
            socket.sendto(string_to_send, self.client_address)
            print('waiting Reply Bytes String from client..') //how to get the reply bytes  string from Client side?
if __name__ == "__main__":
    HOST, PORT = "", 6903
    server = socketserver.UDPServer((HOST, PORT), MyUDPHandler)
    server.serve_forever()

第一步：服务器接收到GPS设备发送的字节字符串，并且会获得一个动态IP地址。
第二步：当服务器获取到客户端的动态IP地址后，服务器会向客户端（GPS设备）发送一个命令。
第三步：客户端会发送回一个字节字符串，但我不知道在这里怎么捕捉到这个回复的字节字符串。

Answer 1

如果服务器能回复发送者的IP地址和端口号，你就可以这样做。

print('waiting Reply Bytes String from client..') //how to get the reply bytes  string from Client side?
bytes = socket.recvfrom(1024);