Passphrase generator based on EFF wordlist. Also can read string of numbers and show you words from wordlist

eff_word_gen.py

#!/usr/bin/env python3

#####
#
# Passphrase generator based on EFF wordlist
# Can generate new array of words and string of numbers for it
# Also can read string of numbers and show you words from wordlist
#
#####

import urllib.request
import random
import argparse


def read_word_list():
    link = 'https://www.eff.org/files/2016/07/18/eff_large_wordlist.txt'
    file = urllib.request.urlopen(link).read()
    return dict(line.decode('utf8').split('\t') for line in file.splitlines())


def get_new_password(num):
    word_dict = read_word_list()
    keys = list(word_dict.keys())
    random.shuffle(keys)
    word_list = []
    num_list = []
    for n in range(num):
        key = keys[n]
        word = word_dict.get(key)
        num_list.append(key)
        word_list.append(word)
        print(key, word)
    print('')
    print(''.join(num_list))
    print(' '.join(word_list))


def read_numstring_to_words(numstring):
    word_list = []
    num_list = []
    wrong_code = False
    while True:
        num_list.append(int(numstring[:5]))
        numstring = numstring[5:]
        if len(numstring) == 0:
            break
        elif len(numstring) < 5:
            wrong_code = True
            break
    if wrong_code:
        print('Invalid length')
    else:
        print(num_list)
        word_dict = read_word_list()
        for num in num_list:
            word_list.append(word_dict[str(num)])
        print(''.join(word_list))


def main(command_line=None):
    parser = argparse.ArgumentParser()
    subparsers = parser.add_subparsers(dest='command')

    parser_new = subparsers.add_parser('new', help='generate new password')
    parser_new.add_argument('NUMBER', type=int, default=6, help='number of words which you need (default = 6)')

    parser_read = subparsers.add_parser('read', help='get words from number string')
    parser_read.add_argument('NUMSTRING', type=int, help='string of numbers (without spaces)')

    args = parser.parse_args(command_line)
    if args.command == 'new':
        get_new_password(args.NUMBER)
    elif args.command == 'read':
        read_numstring_to_words(str(args.NUMSTRING))
    else:
        parser.print_help()


if __name__ == '__main__':
    main()