Detect an ip address

detect_ip_address.py

import sys

def ipv6(s):
    group_split = s.split(':')
    if len(group_split) == 8:
        for sub in group_split:
            try:
                ip_val = int(sub, 16)
                if 0 <= ip_val <= 65535:
                    continue
                else:
                    return None
            except:
                return None
        return "IPv6"
    return None

def ipv4(s):
    group_split = s.split('.')
    if len(group_split) == 4:
        is_valid = False
        for sub in group_split:
            try:
                ip_val = int(sub)
                if 0 <= ip_val <= 256:
                    continue
                else:
                    return None
            except:
                return None
        return "IPv4"
    return None

def print_type(s):
    res = ipv4(s)
    if res is not None:
        return res

    res = ipv6(s)
    if res is not None:
        return res      

    return "Neither"

i = 0
for line in sys.stdin:
    if i > 0:
        print(print_type(line))
    i += 1