Generate easy to remember passwords

correcthorsebatterystaple

#!/usr/bin/python3 -O

from Crypto.Random import get_random_bytes
from math import ceil, log2
from struct import unpack
from sys import argv, exit

if __name__ == "__main__":
    with open("/usr/share/dict/cracklib-small") as wordlist:
        words = wordlist.readlines()
        password = []
        strength = int(argv[1]) if len(argv) > 1 else 128
        bits = log2(len(words))
        n = round(strength / bits)
        mask = (1 << ceil(bits)) - 1
        for i in range(n):
            x = len(words)
            while x >= len(words):
                x = unpack("=Q", get_random_bytes(8))[0] & mask
            password.append(words[x].strip())
        print(*password)