bullsandcows.py

import random


class BullsAndCows:

    def __init__(self):
        self.NUMOFDIGITS = 4

    def play(self):
        print(
        "Hi buddy!\n",
        "Do you fancy play with me bulls and cows? The rules are simple:\n",
        "\t1. I will generated random {} digits for you\n".format(self.NUMOFDIGITS),
        "\t2. You are supposed to guess the generated number\n",
        "Let's play a bulls and cows game!\n",
        "Enter a number:")
        self.game_number = self._generate_number()

        num_of_tries = 0
        while(1):
            inp = str(input(">"))
            valid_input = self._validate_input(inp)
            num_of_tries += 1
            if(valid_input):
                bulls, cows = self._get_bulls_cows(inp)
                print("{} bulls, {} cows.".format(bulls, cows))
                if(bulls == self.NUMOFDIGITS):
                    break
        print("Correct, you've guessed the right number in {} guesses!".format(num_of_tries))
        if num_of_tries < 4:
            performance = "amazing"
        elif num_of_tries < 7:
            performance = "average"
        else:
            performance = "not so good"
        print("That's {} result.".format(performance))

    def _get_bulls_cows(self, inp):
        bulls = 0
        cows = 0
        for i, digit in enumerate(inp):
            if digit in self.game_number:
                if digit == self.game_number[i]:
                    bulls += 1
                else:
                    cows += 1
        return bulls, cows

    def _generate_number(self):
        digits = [str(x) for x in range(0, 10)]
        return "".join(random.sample(digits, self.NUMOFDIGITS))

    def _validate_input(self, inp):
        try:
            int(inp)
        except:
            print("Man, enter a number, not {}!".format(inp))
            return 0
        if len(inp) != self.NUMOFDIGITS:
            print("You are guessing {} digits number, not {}.".format(self.NUMOFDIGITS, len(inp)))
            return 0
        if len(set(inp)) != self.NUMOFDIGITS:
            print("You are supposed to guess {} distinct digits.".format(self.NUMOFDIGITS))
            return 0
        return 1


if __name__ == "__main__":
    game = BullsAndCows()
    game.play()