The script takes N as number of lines to read; then takes N lines and checks if the line is IPv4, IPv6 or neither.

IP Address Validation (Hacker Rank)

import re


n = int(input())

for _ in range(n):
    output = 'Neither'
    line = str(input())
    match = re.match(r'^(\d{0,3})\.(\d{0,3})\.(\d{0,3})\.(\d{0,3})$', line)
    if match is not None:
        groups = match.groups()
        output = 'IPv4'
        for group in groups:
            if int(group) > 255:
                output = 'Neither'
                break
    else:
        match = re.search(r'^([0-9a-f]{0,4}:){7}[0-9a-f]{0,4}$', line)
        if match is not None:
            output = 'IPv6'
        else:
            output = 'Neither'

    print(output)