input_integer_in_range.py

# Validated input function for numbers min-max.
# This function will ensure that numbers are:
# 1. Not too big
# 2. Not too small
# 3. Valid integers
def input_integer_in_range(prompt, min_val, max_val):

    user_num = None
    while user_num == None:
        try:
            user_num = int(input(prompt))
            if user_num < min_val:
                print("You entered a number that is too small. Try again.")
                user_num = None
            elif user_num > max_val:
                print("You entered a number that is too big. Try again.")
                user_num = None

        except ValueError:
            print("Please enter a valid integer.")

    return user_num


# Test the validated input function multiple times.
def main():
    for i in range(15):
        prompt = "Enter number " + str(i) + " (-10-30): "
        print("You entered: ", input_integer_in_range(prompt, -10, 30))


main()