check_input.py

def get_user_input(start, end):
    """
        input: two integer values
               lower limit 'start' and maximum 'end'
               the arguments aren't inclusive.

        output: if reading successful then returns the read integer. 

        purpose: reads from command-line a integer in the given bounds. 
                 while input invalid asks user again
    """

    loop = True  # controls while-loop

    while loop:

        try:

            # reads and converts the input from the console. 
            user_input = int(input("Enter Your choice: "))

            # checks whether input is in the given bounds.
            if user_input > end or user_input < start:

                # error case
                print("Please try again. Not in valid bounds.")

            else:

                # valid case
                loop = False  # aborts while-loop

        except ValueError:

            # error case
            print("Please try again. Only numbers")

    return user_input


x = get_user_input(1, 6)
print(x)
# Asks user to enter something, ie. a number option from a menu.
# While type != interger, and not in the given range,
# Program gives error message and asks for new input.