PracticePython/Exercise8(rock, paper, scissors cmd line)

Exercise8.py

def validate_input(player_choice):
        if player_choice != "r" and player_choice != "p" and\
         player_choice != "s":
                print("The input was invalid. Please input 'r', 'p' or 's'") 
                return False
        else:
                return True

def winner(player_1_choice, player_2_choice):
	if player_1_choice == player_2_choice:
		print("it is a tie")
	elif player_1_choice == "r" and player_2_choice == "s" or\
	player_1_choice == "p" and player_2_choice == "r" or\
	player_1_choice == "s" and player_2_choice == "p":
		print("Player 1 wins this round")
	else:
		print("Player 2 wins this round")

def play():
	while True:
		play = raw_input("play rock, paper, scissors?(y/n)")
		if play == "y":
			player_1_choice = raw_input("Player 1, enter r, p or s:")
			if validate_input(player_1_choice) == True:
				player_2_choice = raw_input("Player 2, enter r, p or s:")
				if validate_input(player_2_choice) == True:
					winner(player_1_choice, player_2_choice)
			else:
				continue
		elif play == "n":
			return
		else:
			print("Invalid response. Only 'y' or 'n' are allowed")
play()