how to get access to initgroups in python < 2.7

ctype initgroups system call

import os

from ctypes import CDLL, get_errno, c_char_p, c_int

libc = CDLL(None, use_errno=True)

def errcheck(result, func, arguments):
    if result != 0:
        e = get_errno()
        raise OSError(e, os.strerror(e))

initgroups = libc.initgroups
initgroups.argtypes = [c_char_p, c_int]
initgroups.restype = c_int
initgroups.errcheck = errcheck