如何从.py文件中运行一个本地主机，该主机将继续运行，直到某个关键字停止它为止？

import socket
import threading

def handle_client(client_socket):
    while True:
        # 接收客户端发送的数据
        data = client_socket.recv(1024).decode('utf-8')
        
        # 判断是否收到停止关键字
        if data == 'stop':
            break
        
        # 处理接收到的数据
        # ...
        
        # 发送响应给客户端
        response = 'Received: ' + data
        client_socket.send(response.encode('utf-8'))
    
    # 关闭客户端连接
    client_socket.close()

def start_server():
    # 创建socket对象
    server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    
    # 绑定IP地址和端口号
    server_address = ('localhost', 8888)
    server_socket.bind(server_address)
    
    # 监听客户端连接
    server_socket.listen(5)
    
    print('Server is running on {}:{}'.format(*server_address))
    
    while True:
        # 接受客户端连接
        client_socket, client_address = server_socket.accept()
        print('Client {}:{} connected'.format(*client_address))
        
        # 创建一个线程来处理客户端连接
        client_thread = threading.Thread(target=handle_client, args=(client_socket,))
        client_thread.start()

if __name__ == '__main__':
    start_server()