rockpaper.py

#!/usr/bin/env python2

import random
import time

rock = 1
paper = 2 
scissors = 3

names  = { rock: "Rock", paper: "Paper", scissors: "Scissors" }
rules = { rock: scissors, paper: rock, scissors: paper }

player_score = 0
computer_score = 0

def start():
	print "Let's play a game of Rock, Paper, Scissors."
	while game():
		pass
	scores()

def game():
	player = move()
	computer = random.randint(1, 3)
	result(player, computer)
	return play_again()

def move():
	while True:
		print
		player = raw_input("Rock = 1\nPaper = 2\nScissors = 3\nMake a move: ")
		try:
			player = int(player)
			if player in(1,2,3):
				return player
		except ValueError:
			pass
		print "Oops! I did'nt understand that. Please enter 1, 2 or 3"

def result(player, computer):
	print "1..."
	time.sleep(1)
	print "2..."
	time.sleep(1)
	print "3!"
	time.sleep(0.5)
	print "Computer throw {0}!".format(names[computer])
	global player_score, computer_score
	if player == computer:
		print "Tie game."
	else:
		if rules[player] == computer:
			print "Your victory has been assured."
			player_score += 1
		else:
			print "The computer laughs as you realise you have been defeated"
			computer_score += 1

def play_again ():
	answer = raw_input("Would you like to play again? y/n: ")
	if answer in ("y", "Y", "Yes", "yes"):
		return answer
	else:
		print "Thank you very much for playing our game. See you next time!"

def scores():
	global player_score, computer_score
	print "HIGH SCORES"
	print "Player: ", player_score
	print "Computer: ", computer_score

if __name__ == '__main__':
	start()