Server端:

import socketserver

class MyTCPHandler(socketserver.BaseRequestHandler):
    def handle(self):
        while True:
            try:
                self.data = self.request.recv(1024).strip()
                print("{} write:".format(self.client_address[0]))
                print(self.data)
                self.request.send(self.data.upper())
            except ConnectionAbortedError as e:
                print("err",e)
                break

if __name__ == "__main__":
    HOST,PORT = "localhost",9999
    server = socketserver.TCPServer((HOST,PORT),MyTCPHandler)
    server.serve_forever() #处理多个请求

Client端:

import socket

client = socket.socket()

client.connect(('localhost',9999))

while True:
    msg = input(">>:").strip()

    client.send(msg.encode("utf-8"))

    data = client.recv(1024)

    print("recv",data.decode())
client.close()