A game of Rock, Paper, Scissors against the computer.

rock_paper_scissors.py

#!/usr/bin/env python3

"""A game of Rock, Paper, Scissors against the computer."""

import random
import time

FORMS = ("Rock", "Paper", "Scissors")


class RockPaperScissors():
    """A classic game of Rock, Paper, Scissors."""

    def __init__(self):
        self.hands = {"You": "", "CPU": ""}
        self.score = {"You": 0, "CPU": 0}
        self.play_again = True

    def __repr__(self):
        return "Rock, Paper, Scissors: Player {} - CPU {}".format(
            self.score["You"], self.score["CPU"]
        )

    @staticmethod
    def choice_player():
        """Let the player choose a form, and return it."""
        print("\nChoose your form:")
        print("1 - {}".format(FORMS[0]))
        print("2 - {}".format(FORMS[1]))
        print("3 - {}\n".format(FORMS[2]))
        number = ""
        while (number not in "123") or (len(number) != 1):
            number = input("Your choice (1/2/3): ")
        return FORMS[int(number) - 1]

    @staticmethod
    def choice_cpu():
        """Choose a form for the computer, and return it."""
        return random.choice(FORMS)

    def decide(self):
        """Decide who wins."""
        player = self.hands.values()[0]
        player = self.hands.values()[1]
        if ((player == FORMS[0] and cpu == FORMS[2]) or
                (player == FORMS[1] and cpu == FORMS[0]) or
                (player == FORMS[2] and cpu == FORMS[1])):
            winner = rr
        elif ((cpu == FORMS[0] and player == FORMS[2]) or
              (cpu == FORMS[1] and player == FORMS[0]) or
              (cpu == FORMS[2] and player == FORMS[1])):
            winner = "CPU"
        else:
            winner = None
        return winner

    def play(self):
        """Start game loop, call game methods."""
        print("Welcome to Rock, Paper, Scissors.")

        time.sleep(2)
        while self.play_again:

            self.hands["You"] = self.choice_player()
            self.hands["CPU"] = self.choice_cpu()
            winner = self.decide()
            time.sleep(2)

            print("\nYou chose:", self.hands["You"])
            print("CPU chose:", self.hands["CPU"])
            if winner:
                print("{} won!".format(winner))
                self.score[winner] += 1
            else:
                print("It's a tie!")
            time.sleep(2)

            print("\nYou: {}".format(self.score["You"]))
            print("CPU: {}".format(self.score["CPU"]))

            answer = ""
            while (answer not in ("y", "n")) or (len(answer) != 1):
                answer = input("Play again? (y/n) ").lower()
            if answer == "y":
                self.play_again = True
            else:
                self.play_again = False

        print("\nThanks for playing!")


def main():
    """Create game object and start its play() method."""
    rps_game = RockPaperScissors()
    rps_game.play()

if __name__ == "__main__":
    main()