pwgen.py

import random
import string 


smailar_chars = '01oilLIOpP'
upper = "".join(set(string.uppercase) - set(smailar_chars))
lower = "".join(set(string.lowercase) - set(smailar_chars))
chars = upper + lower
numbers = '23456789'
symbols = '#$%&+,-./:;_~?=@!'

groups = (upper, lower, numbers, symbols)

def genpass(length=8):
    pw = [random.choice(i) for i in groups]
    print pw
    con = ''.join(groups)
    for i in range(length-len(pw)):
        pw.append(random.choice(con))
    random.shuffle(pw)
    return ''.join(pw)

import sys
print genpass(int(sys.argv[1]))