dns解析要不要配反向解析

import dns.resolver

# 正向解析
def forward_resolve(domain):
    try:
        answers = dns.resolver.resolve(domain, 'A')
        for rdata in answers:
            print(f'{domain} -> {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'Query timed out.')

# 反向解析
def reverse_resolve(ip):
    try:
        answers = dns.resolver.resolve(ip, 'PTR')
        for rdata in answers:
            print(f'{ip} -> {rdata}')
    except dns.resolver.NXDOMAIN:
        print(f'{ip} does not exist.')
    except dns.resolver.NoAnswer:
        print(f'{ip} has no PTR records.')
    except dns.resolver.Timeout:
        print(f'Query timed out.')

# 示例调用
forward_resolve('www.example.com')
reverse_resolve('192.0.2.1')