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RPS.py

"""This program will simulate a game of rock paper scissors"""
from random import randint
from time import sleep

options = ["R", "P", "S"]
loss = "You lost!"
win = "Congratulations, you win!"

def decide_winner(user_choice, computer_choice):
  print "You selected %s" % user_choice
  print "Computer selecting..."
  sleep(1)
  print "The computer selected %s" % computer_choice
  user_choice_index = options.index(user_choice)
  computer_choice_index = options.index(computer_choice)
  if user_choice_index == computer_choice_index:
    print"It's a tie!"
  elif user_choice_index == 0 and computer_choice_index == 2:
    print win
  elif user_choice_index == 1 and computer_choice_index == 0:
    print win
  elif user_choice_index == 2 and computer_choice_index == 1:
    print win
  elif user_choice_index > 2:
    print"Invalid selection"
    return
  else:
    print loss
    

    
def play_RPS():
  print"Rock, Paper, or Scissors"
  user_choice = raw_input("Select R for rock, P for paper,     or S for scissors")
  sleep(1)
  user_choice = user_choice.upper
  computer_choice = options[randint(0,len(options)-1)]
  decide_winner(user_choice,computer_choice)

play_RPS()