怎么查网站的子域名

import dns.resolver

def find_subdomains(domain):
    subdomains = set()
    try:
        answers = dns.resolver.resolve(domain, 'A')
        for rdata in answers:
            print(f'IP: {rdata}')
    except dns.resolver.NXDOMAIN:
        print(f'{domain} does not exist.')
    except dns.resolver.NoAnswer:
        print(f'{domain} has no A records.')
    except dns.resolver.Timeout:
        print(f'{domain} could not be resolved.')
    except Exception as e:
        print(f'An error occurred: {e}')

    # 这里可以添加更多的DNS记录类型查询，如MX、CNAME等

    return subdomains

domain = 'example.com'
subdomains = find_subdomains(domain)
print(f'Subdomains of {domain}: {subdomains}')