import socket class SC(object):     def f(self):         udp_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)         udp_socket.bind(('', 80))         while True:             recv_data = udp_socket.recvfrom(1024)             recv_msg = recv_data[0]             print(recv_msg.decode('gbk'))         udp_socket.close() if __name__ == '__main__':     sc = SC()     sc.f()