Python bitting generator

bitting.py

#!/usr/bin/env python3
# encoding=utf-8
# vim: set nobomb:

from random import SystemRandom
from typing import List, Optional


def bitting(codes: int, macs: int, length: int, progress: Optional[List[int]]=None) -> List[int]:
	if 0 == length:
		return progress
	elif progress:
		return bitting(codes, macs, length - 1, progress + [SystemRandom().choice([cut for cut in range(codes) if abs(cut - progress[-1]) <= macs])])
	else:
		return bitting(codes, macs, length - 1, [SystemRandom().choice(range(codes))])