python 正则判断ip和域名

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    def is_domain(self, domain):
        domain_regex = re.compile(
            r'(?:[A-Z0-9_](?:[A-Z0-9-_]{0,247}[A-Z0-9])?\.)+(?:[A-Z]{2,6}|[A-Z0-9-]{2,}(?<!-))\Z', 
            re.IGNORECASE)
        return True if domain_regex.match(domain) else False

    def is_ipv4(self, address):
        ipv4_regex = re.compile(
            r'(?:25[0-5]|2[0-4]\d|[0-1]?\d?\d)(?:\.(?:25[0-5]|2[0-4]\d|[0-1]?\d?\d)){3}',
            re.IGNORECASE)
        return True if ipv4_regex.match(address) else False