如何使用第一个可用端口在Python中创建HTTP服务器？

import http.server
import socket

def find_first_available_port(start_port):
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    while True:
        try:
            sock.bind(('localhost', start_port))
            sock.close()
            return start_port
        except OSError:
            start_port += 1

def create_http_server(port):
    handler = http.server.SimpleHTTPRequestHandler
    with socketserver.TCPServer(("", port), handler) as httpd:
        print(f"Serving on port {port}")
        httpd.serve_forever()

start_port = 8000
port = find_first_available_port(start_port)
create_http_server(port)