问UDP客户端每秒发送一次ping，并打印发送到它的任何内容？

EN

import socket
from time import sleep
from contextlib import contextmanager

UDP_IP_ADDRESS = "127.0.0.1"
UDP_PORT_NO = 14004
Message = b"Hello World, From Client B"


@contextmanager
def socket_ctx():
    """ Context Manager for the socket. Makes sure the socket will close regardless of why it exited."""
    my_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    # Assign IP address and a RANDOM available port number to socket
    my_socket.bind(('127.0.0.1', 0))
    try:
        # Let the rest of the app use the socket and wait for it to finish
        yield my_socket
    finally:
        my_socket.close()


def send_data(client_sock):
    client_sock.sendto(Message, (UDP_IP_ADDRESS, UDP_PORT_NO))


def listen(client_sock):
    print(client_sock.recvfrom(100))



with socket_ctx() as sock:
    while True:
        send_data(sock)
        listen(sock)
        sleep(2)