python写的udp ping

下面是一个简单的Python UDP ping示例：

import socket
import time

server_address = ('localhost', 12000)
ping_message = 'Ping'.encode('utf-8')
timeout = 1.0  # seconds

# create a UDP socket
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

# set timeout
sock.settimeout(timeout)

for i in range(10):
    # send ping message
    start_time = time.time()
    sock.sendto(ping_message, server_address)

    # receive response
    try:
        data, server = sock.recvfrom(1024)
        end_time = time.time()
        print('Received response from {}: time={} ms'.format(server[0], int((end_time - start_time) * 1000)))
    except socket.timeout:
        print('Request timed out')

在这个例子中，我们使用了Python的`socket`模块来创建一个UDP socket，并使用`settimeout`方法设置了1秒的超时时间。我们循环发送10个ping消息，并等待接收响应。如果在超时时间内没有收到响应，就会打印“Request timed out”的消息。如果收到响应，就会打印“Received response from <服务器地址>: time=<响应时间> ms”的消息。