from socket import * HOST = 'localhost' PORT = 21567 BUFSIZ = 1024 ADDR = (HOST, PORT) udpCliSock = socket(AF_INET, SOCK_DGRAM) while True: data = 'data' if not data: break udpCliSock.sendto(data, ADDR) data, ADDR = udpCliSock.recvfrom(BUFSIZ) if not data: break print dataudpCliSock.close() udpCliSock.close()