# Check that users have entered a valid
# option based on a list
def string_checker(question, valid_ans=("yes", "no")):
    while True:

        error = f"Enter a valid option from {valid_ans}"

        user_response = input(question).lower()

        for item in valid_ans:
            # check if the user response is a valid answer
            if item == user_response:
                return item

            elif user_response == item[0]:
                return item

        print(error)
        print()


def instructions():
    print('''
    
            **** Instructions ****
            
            To begin, choose the number of rounds (or press <enter> for infinite mode).
            
            
            Then play against the computer, You enter R (rock), P (paper) or S (scissors),
            
            The rules are:
            Paper beats rock
            Rock beats scissors
            Scissors beats paper
            
            Press xxx to end the game at any time
            
            
            
            
            '''
          )


# checks the input is an integer

def int_check(to_check):

    while True:
        error = "Enter an integer more than 1"

        if to_check == "":
            return "infinite"

        try:
            response = int(to_check)

            # check the number is more than 1
            if response >= 1:
                return response

            else:
                print(error)

        except ValueError:
            print(error)


# Main routine
print()
print(" *** Rock / Paper / Scissors Game *** ")
print()

want_instructions = string_checker("Do you want to see the instructions? ")

if want_instructions == "yes":
    instructions()
else:
    print("program continues")