Very Simple Mastermind

#!/usr/bin/env python3

"""
Very Simple Mastermind
"""

import random


LENGTH = 4

NB_SYMBOL = 5


def main():
    """
    Main
    """
    combination = ''.join(str(random.randint(1, NB_SYMBOL))
                          for _ in range(LENGTH))
    # print(combination)  # for debug
    found = False

    nb = 0
    while not found:
        nb += 1
        current = (input('Your proposition? ').strip() + '1111')[:LENGTH]
        nb_good = sum((1 if value == combination[i]
                       else 0)
                      for i, value in enumerate(current))
        found = (nb_good == LENGTH)
        # print(current)  # for debug
        print('{} good values, {} bad values'
              .format(nb_good, LENGTH - nb_good))

    print('You found the good combination {} in {} steps.'.format(current, nb))


if __name__ == '__main__':
    main()