不知道端口号的套接字连接- Python

import socket

def connect_socket(host):
    try:
        # 获取对方主机的IP地址和端口号
        addrinfo = socket.getaddrinfo(host, None)
        for info in addrinfo:
            family, socktype, proto, canonname, sockaddr = info
            ip_address, port = sockaddr[:2]
            
            # 创建套接字
            sock = socket.socket(family, socktype, proto)
            
            try:
                # 连接套接字
                sock.connect(sockaddr)
                print("Connected to {}:{}".format(ip_address, port))
                break
            except socket.error:
                print("Connection failed to {}:{}".format(ip_address, port))
            finally:
                sock.close()
    except socket.gaierror:
        print("Invalid host")

# 调用函数进行套接字连接
connect_socket("www.example.com")