#!/usr/bin/env python

import grp
import pwd
import sys

def usage():
    print >> sys.stderr, "Usage: id-other-than <--user|--group> ID [ID ...]"

if len(sys.argv) < 2:
    usage()
    sys.exit(1)

def is_integer(x):
    try:
        int(x)
        return True
    except ValueError, e:
        return False

excluded_ids = frozenset(int(x) for x in sys.argv[2:] if is_integer(x))
excluded_names = frozenset(x for x in sys.argv[2:] if not is_integer(x))

if sys.argv[1] == '--user':
    for x in pwd.getpwall():
        if x.pw_name not in excluded_names and x.pw_uid not in excluded_ids:
            print x.pw_name + ':' + str(x.pw_uid)
            sys.exit(0)
elif sys.argv[1] == '--group':
    for x in grp.getgrall():
        if x.gr_name not in excluded_names and x.gr_gid not in excluded_ids:
            print x.gr_name + ':' + str(x.gr_gid)
            sys.exit(0)
else:
    usage()
    sys.exit(1)