socketserver

import socketserver


class MySocket(socketserver.StreamRequestHandler):
    def handle(self):
        conn = self.request
        add = self.client_address

        while True:
            accept_data = str(conn.recv(1024), encoding='utf-8')
            print(accept_data)
            send_data = bytes(input(">>>>>"), encoding="utf8")
            conn.sendall(send_data)


if __name__ == '__main__':
    sever = socketserver.ThreadingTCPServer(('127.0.0.1', 8888), MySocket)
    sever.serve_forever()

import socket

sock=socket.socket()
sock.connect(('127.0.0.1',8888))

while True:
    sock.sendall(bytes('456',encoding="utf8"))
    accept_data=str(sock.recv(1024),encoding="utf8")
    print(accept_data)