Random Password Generator in Python

genpass.py

#!/usr/bin/python

# this script generates a random password of length 8,
# or whatever length is passed in on the command line

from string import ascii_letters, digits, punctuation
import sys, random

chars = ascii_letters + digits + punctuation
chars = chars.replace("\\", "")

if __name__ == "__main__":
  n = 8
  if len(sys.argv) == 2:
    n = int(sys.argv[1])
  pw = "".join(random.sample(chars, n))
  print pw
  exit