import socketdef send_msg(udp_socket):    """发送消息"""    # 获取要发送的内容    desk_ip = input("输入对方的ip：")    desk_port = int(input("输入对方的port："))    send_date = str(input("请输入要发送的消息："))    udp_socket.sendto(send_date.encode("utf-8"), (desk_ip, desk_port))def recv_msg(udp_socket):    # 接受并显示    recv_date = udp_socket.recvfrom(1024)    print("%s:%s" % (str(recv_date[1]), recv_date[0].decode("utf-8")))def main():    # 创建套接字    udp_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)    # 绑定信息    udp_socket.bind(("", 8080))    # 循环来处理事情    while True:        print("*" * 50)        print("1:发送消息")        print("2:接收消息")        print("0:退出系统")        op = input("请输入功能：")        if op == "1":            # 发送            send_msg(udp_socket)        elif op == "2":            # 接受并显示            recv_msg(udp_socket)        elif op == "0":            break        else:            print("输入错误重新输入")if __name__ == '__main__':    main()