Output human readable IGMP Groups from /proc/net/igmp

igmp.py

import re

regex = re.compile(r'[0-9A-F]{8}', flags=re.MULTILINE | re.IGNORECASE)

def readable(s):
    addr = ''
    for i in range(0, len(s.group()), 2):
        chunk = str(int(s.group()[i:i+2], 16))
        addr = chunk + '.' + addr
    return addr.rstrip('.')

print(re.sub(regex, lambda h: readable(h), open('/proc/net/igmp', 'r').read()))