import socket
 
# 创建UDP socket
udp_server_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
 
# 绑定地址和端口
server_address = ('localhost', 12000)
udp_server_socket.bind(server_address)
 
# 服务器循环
while True:
    # 接收客户端消息
    message, client_address = udp_server_socket.recvfrom(1024)
    print(f"Received message: {message} from {client_address}")
 
    # 处理消息（这里仅回显相同的消息）
    udp_server_socket.sendto(message, client_address)
 
# 关闭socket
udp_server_socket.close()