使用python创建udp

在Python中，你可以使用内置的socket模块来创建和操作UDP套接字。下面是一个简单的例子展示如何创建一个UDP客户端和服务器：

### 创建UDP客户端

import socket

def udp_client(message, host, port):
    sock = socket.socket(socket.AF_INET, # Internet
                         socket.SOCK_DGRAM) # UDP
    try:
        print(f"Sending to {host}:{port}")
        sock.sendto(message.encode(), (host, port))
        response, addr = sock.recvfrom(1024) # buffer size is 1024 bytes
        print(f"Received from {addr}: {response.decode()}")
    finally:
        sock.close()

# 示例：向'localhost'的8888端口发送消息
udp_client("Hello, UDP!", "localhost", 8888)

### 创建UDP服务器

import socket

def udp_server(host, port):
    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) # UDP server
    sock.bind((host, port)) # listen on given address and port
    while True:
        data, addr = sock.recvfrom(1024) # receive data and its sender's address
        print(f"Received message from {addr}: {data.decode()}")
        # process the received data here...
        reply = "Message received!" # you can customize this response
        sock.sendto(reply.encode(), addr)

# 示例：在'localhost'的8888端口监听并响应
udp_server("localhost", 8888)

在这个例子中，服务器会持续监听来自特定主机和端口的数据，并作出回应。客户端则是主动发起数据交换。