A rock, paper, scissors-type game in Python.

rpslsy.py

import random 

valid_choices = ['rock','paper','scissors','lizard','spock']

def main():
	print ("Let's play a game - rock, paper, scissors, Spock, or lizard! Enter Y to play or N to quit.")
	choice = input("Y/N?: ").upper()
	if choice == 'Y':		
		game()
	elif choice == "N":
		exit()
	else:
		exit()


def game():
	your_choice = input("Choose rock, paper, scissors, Spock, or lizard!: ").lower()
	if your_choice in valid_choices:
		choice_dict = {1:'rock', 2:'paper', 3:'scissors',4:'spock', 5:'lizard'}
		computer_num = random.randrange(1,6)
		computer_choice = choice_dict[computer_num]
		print ("Computer chose", computer_choice)
		if your_choice == computer_choice:
			print ("Tie!")
			game()
		if your_choice == 'rock' and computer_choice == 'paper':
			print ("You lose - paper covers the rock!")
			main()
		if your_choice == 'rock' and computer_choice == 'scissors':
			print("You win - rock smashes the scissors!")
			main()
		if your_choice == 'rock' and computer_choice == 'spock':
			print("You lose - Spock vaporizes the rock!")
			main()
		if your_choice == 'rock' and computer_choice == 'lizard':
			print("You win - rock smashes the lizard!")
			main()

		if your_choice == 'paper' and computer_choice == 'rock':
			print("You win - paper covers the rock!")
			main()
		if your_choice == 'paper' and computer_choice == 'scissors':
			print("You lose - scissors cut the paper!")
			main()
		if your_choice == 'paper' and computer_choice == 'spock':
			print("You win - paper disproves Spock!")
			main()
		if your_choice == 'paper' and computer_choice == 'lizard':
			print("You lose - lizard eats the paper!")
			main()


		if your_choice == 'scissors' and computer_choice == 'rock':
			print("You lose - rock smashes the scissors!")
			main()
		if your_choice == 'scissors' and computer_choice == 'paper':
			print("You win - scissors cut the paper!")
			main()
		if your_choice == 'scissors' and computer_choice == 'spock':
			print("You lose - Spock smashes the scissors!")
			main()
		if your_choice == 'scissors' and computer_choice == 'lizard':
			print("You win - scissors decapitate the lizard!")
			main()


		if your_choice == 'spock' and computer_choice == 'rock':
			print("You win - Spock vaporizes the rock!")
			main()
		if your_choice == 'spock' and computer_choice == 'paper':
			print("You lose - paper disproves Spock!")
			main()
		if your_choice == 'spock' and computer_choice == 'scissors':
			print("You win - Spock smashes the scissors!")
			main()
		if your_choice == 'spock' and computer_choice == 'lizard':
			print("You lose - the lizard poisons Spock!")
			main()



		if your_choice == 'lizard' and computer_choice == 'rock':
			print("You lose - rock crushes the lizard!")
			main()
		if your_choice == 'lizard' and computer_choice == 'paper':
			print("You win - lizard eats the paper!")
			main()
		if your_choice == 'lizard' and computer_choice == 'scissors':
			print("You lose - scissors decapitate the lizard!")
			main()
		if your_choice == 'lizard' and computer_choice == 'spock':
			print("You win - lizard poisons Spock!")
			main()
	else:
		print ("Sorry, that is not a valid choice!")
		main()

main()