如何在python中检查域名是否有ssl证书？

import ssl
import socket

def check_ssl_certificate(domain, port=443):
    context = ssl.create_default_context()
    try:
        with socket.create_connection((domain, port)) as sock:
            with context.wrap_socket(sock, server_hostname=domain) as ssock:
                certificate = ssock.getpeercert()
                if certificate:
                    print(f"域名 {domain} 具有 SSL 证书")
                else:
                    print(f"域名 {domain} 没有 SSL 证书")
    except Exception as e:
        print(f"无法检查域名 {domain} 的 SSL 证书: {e}")

# 使用示例
check_ssl_certificate("example.com")