Extract a Domain name from the url and also check if the domain was IP address or domain name

get_domain.py

#!/usr/bin/env python3
from collections import namedtuple
from itertools import groupby
from fastnumbers import isint
from ipaddress import ip_address


def is_ip(test_string):
    """Checks whether a given string contains IP address or IP address with port
    :param test_string: The string to test for IP
    :return: a tuple of IP address & Port and IP Version if ip_address else None
            eg: (ip='', port='', version=) or False
    """
    if not isinstance(test_string, str):
        return False

    IP = namedtuple('Ip', ['ip', 'port', 'version'])
    result = False
    try:
        # if it worked here then
        # -> Either IPv6 or IPv4 without a :port_number
        # and also yes its valid IP
        result = ip_address(test_string.strip().strip('[').strip(']').strip())
        result = IP(ip=str(test_string), port="", version=result.version)
    except ValueError:
        # try another method by splitting
        # using ':' assuming we might have a port number
        ip, port, *_ = (test_string.rsplit(':', 1) + [None])
        ip = ip.strip('[').strip(']')  # just in case if ipv6 with port was present
        try:
            # if it works here then
            # we have a valid IPv6 or IPv4 with mostly a port number
            result = ip_address(ip)
            if isint(port):
                # port number present
                result = IP(ip=str(ip), port=str(port), version=result.version)
            else:
                # no port number present, but there was ':' with something after it
                result = IP(ip=str(ip), port="", version=result.version)
        except ValueError:
            # ain't an ip
            pass

    return result


def extract_domain(url):
    """Extract the domain name from the given URL
    :param url: the url to extract the domain from - string
    :return: a tuple of type and result
            eg: (url_type='domain', result='domain.tld') or (url_type='ip' result='ip:port') of None
    """
    if not isinstance(url, str):
        return None

    R = namedtuple('Result', ['url_type', 'result'])
    dom = url.strip().split("//")[-1]
    dom = [''.join(g) for k, g in groupby(dom, '/?'.__contains__) if not k][0]
    dom = dom.strip('[').strip('<').strip('(').strip()  # just in case if it had to start with any of this
    dom = dom.split('.', 1)[-1].strip() if dom.startswith('www') else dom
    dom = dom.strip(']').strip('>').strip(')').strip()  # just in case if it had to end with any of this
    is_ip_dom = is_ip(dom)
    if is_ip_dom:
        # its a ip-address
        if is_ip_dom.version == 6 and is_ip_dom.port:
            ip = f'[{is_ip_dom.ip}]:{is_ip_dom.port}'
        elif is_ip_dom.version == 6 and not is_ip_dom.port:
            ip = is_ip_dom.ip
        else:
            ip = f'{is_ip_dom.ip}:{is_ip_dom.port}' if is_ip_dom.port else f'{is_ip_dom.ip}'
        result = R(url_type='ip', result=f'{ip}')
    else:
        # assuming web-address
        result = R(url_type='domain', result=f'{dom}')

    return result

>>> extract_domain('2605:2700:0:3::4713:93e3/something')
Result(url_type='ip', result='2605:2700:0:3::4713:93e3')
>>> extract_domain('[2605:2700:0:3::4713:93e3]:80/something')
Result(url_type='ip', result='[2605:2700:0:3::4713:93e3]:80')
>>> extract_domain('https://[2605:2700:0:3::4713:93e3]:80/something')
Result(url_type='ip', result='[2605:2700:0:3::4713:93e3]:80')
>>> extract_domain('https://www.name.com')
Result(url_type='domain', result='name.com')
>>> extract_domain('name.com')
Result(url_type='domain', result='name.com')