如何在python中制作一个网络监听器？

import socket

def start_listener(host, port):
    # 创建一个TCP socket对象
    listener = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    
    try:
        # 绑定监听的主机和端口
        listener.bind((host, port))
        
        # 开始监听
        listener.listen(5)
        
        print(f"[*] 正在监听 {host}:{port}")
        
        while True:
            # 接受客户端连接
            client_socket, addr = listener.accept()
            print(f"[*] 接受来自 {addr[0]}:{addr[1]} 的连接")
            
            # 接收客户端发送的数据
            data = client_socket.recv(1024)
            print(f"[*] 收到数据：{data.decode()}")
            
            # 发送响应数据给客户端
            response = "Hello, client!"
            client_socket.send(response.encode())
            
            # 关闭客户端连接
            client_socket.close()
            
    except Exception as e:
        print(f"[-] 监听器发生错误：{str(e)}")
        
    finally:
        # 关闭监听器
        listener.close()

# 设置监听的主机和端口
host = "127.0.0.1"
port = 12345

# 启动监听器
start_listener(host, port)