def yes_no(question): while True: response = input(question).lower() if response == "yes" or response == "y": return "yes" elif response == "no" or response == "n": return "no" else: print("please enter yes (y) or no (n).\n") while True: want_in = yes_no("Do you wanna read intro? ") print(f"You chose {want_in}\n")