import socketserver


class MyTCPHandler(socketserver.BaseRequestHandler):
    def handle(self):
        while True:
            try:
                self.data = self.request.recv(1024).strip()
                print(self.data)
                if not self.data:break
                self.request.sendall(self.data.upper())
            except ConnectionResetError as e:
                print(e)
                break

if __name__ == ‘__main__‘:
    HOST, PORT = ‘localhost‘, 6969
    server = socketserver.ThreadingTCPServer((HOST, PORT), MyTCPHandler)
    server.serve_forever()

import socket

cs = socket.socket()
cs.connect((‘localhost‘, 6969))
while True:
    sen = input(‘>>:‘).strip()
    if sen == ‘q‘:
        cs.close()
        break
    cs.send(sen.encode(‘utf-8‘))
    rec = cs.recv(1024)
    print(rec.decode())