import socket import threading class Udp_chat(object):     def __init__(self):         self.udp_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)         self.udp_socket.bind(('', 8888))     def send_msg(self):         dest_ip = input('请输入对方的ip:')         dest_port = int(input('请输入对方的端口:'))         while True:             send_data = input('请输入要发送的内容:')             self.udp_socket.sendto(send_data.encode('gbk'), (dest_ip, dest_port))     def recv_msg(self):         recv_data = self.udp_socket.recvfrom(1024)         recv_msg = recv_data[0].decode('gbk')         print(recv_msg) if __name__ == '__main__':     u = Udp_chat()     t_send = threading.Thread(target=u.send_msg)     t_recv = threading.Thread(target=u.recv_msg)     t_send.start()     t_recv.start()