Rock Paper Scissors - Exercise (http://www.practicepython.org/exercise/2014/03/26/08-rock-paper-scissors.html)

rockPaperScissors.py

import random

def start_again():

	print("Invalid Input")
	lets_play()


def play_again():

	choose = str(input("Wanna play again? Yes[y] - No[n] --> "))
	
	if choose.lower() == 'y':
		lets_play()
	else:
		print ("That means NO")
		print ("********************************")
		print ("Thank's 4 playing. See you soon")
		
		
def lets_play():

	choose = str(input("Rock[r] Paper[p] or Scissors[s]? --> "))

	options=['r','p','s']

	if choose.lower() not in options:		
		start_again()
	else:
		robot = random.randint(0,2)
		
		if choose.lower() == 'r' and options[robot] == 's':
			print ("**You Win!, Rock beats Scissors**")
			play_again()
				
		elif choose.lower() == 's' and options[robot] == 'p':
			print ("**You Win!, Scissors beats paper**")
			play_again()
		elif choose.lower() == 'p' and options[robot] == 'r':
			print ("**You Win, Paper beats rock**")
			play_again()
		#User lost
		elif options[robot] == 'r' and choose.lower() == 's':
			print ("**You Lost, Rock beats Scissors**")
			play_again()
		elif options[robot] == 's' and choose.lower() == 'p':
			print ("**You Lost, Scissors beats paper**")
			play_again()
		elif options[robot] == 'p' and choose.lower() == 'r':
			print ("**You Lost, Paper beats rock**")
			play_again()
			
		else:
			print ("**Tie, robot also choose %s **" %(options[robot]))
			play_again()
				
		
lets_play()	

wow, detailed program, but i think u can simplify it a bit, and i wish i could know wt computer used!