A simple rock-paper-scissors game

rps.py

import random
from time import sleep

moves = ["rock", "paper", "scissors"]
choices = [x[0] for x in moves]
WIN, LOSS, DRAW = "WIN", "LOSS", "DRAW"

player_score = 0
computer_score = 0


def end_game():
    print("You: %d | Computer: %d" % (player_score, computer_score))
    exit()


def player_move():
    while True:
        m = input("[r]ock, [p]aper, [s]cissors or [q]uit >").lower()
        if m in choices:
            return moves[choices.index(m)]
        if m in 'q':
            end_game()
        print("Invalid input!")


def determine_winner(computer_choice, player_choice):
    computer = moves.index(computer_choice)
    player = moves.index(player_choice)

    if computer == player:
        return DRAW

    if abs(computer - player) == 1:
        return WIN if player > computer else LOSS

    return WIN if computer == choices[0] else LOSS


if __name__ == '__main__':
    moves = list(map(str.upper, moves))

    while True:
        player = player_move()
        computer = random.choice(moves)
        result = determine_winner(computer, player)

        width = 8
        print("[%02d]%s -> %s" % (player_score, "You".center(width), player))
        print("[%02d]%s -> %s" % (computer_score, "Computer".center(width), computer))
        print("=> %s\n---" % result)

        if result == WIN:
            player_score += 1
        elif result == LOSS:
            computer_score += 1
        sleep(1)