new-password.py

#!/usr/bin/env python3

# The MIT License (MIT) 
# Copyright (c) 2022-present Nathan Todd-Stone 
# https://en.wikipedia.org/wiki/MIT_License#License_terms

import secrets
import sys
import re

# parse dict words
dict_path = '/usr/share/dict/words'
with open(dict_path) as f:
    dict_words = f.read().lower().splitlines()
word_regex = r'^[a-z]+$'
dict_words = list({word for word in dict_words if re.search(word_regex, word)})
num_dict_words = len(dict_words)

# prompt user input
print(f'number of words in {dict_path} matching regex "{word_regex}": {num_dict_words:,}', file=sys.stderr)
print('how many words would you like? ', file=sys.stderr, end='')
num_words = int(input())
print(f'number of possible passwords of word length {num_words}: {num_dict_words ** num_words:,}', file=sys.stderr)

# generate password
print('\n' + ' '.join([dict_words[secrets.randbelow(num_dict_words)] for _ in range(num_words)]))