utils.py

def pause():
    input("\nPress Enter to continue...")

def get_menu_choice(min_val, max_val):
    while True:
        choice = input(f"Enter your choice ({min_val}-{max_val}): ")
        if  choice.isdigit() and min_val <= int(choice) <= max_val:
            return int(choice)

        print("Invalid choice. Please try again.")

def get_positive_number(prompt):
    while True:
        try:
            value = float(input(prompt))
            if value > 0:
                return value
            print("Value must be positive.")
        except ValueError:
            print("Invalid number.")

def get_non_negative_int(prompt):
    while True:
        try:
            value = int(input(prompt))
            if value >= 0:
                return value
            print("Cannot be negative.")
        except ValueError:
            print("Invalid integer.")