generate_random_4_digits

"""
write a script that produces all possible 4-digit numbers (0000...9999),
then put them into a random order and save the output into a text file.
"""
def gen_pins():
    """Generates the pins"""
    pins = {str(n).zfill(4) for n in range(0, 10000)}
    return pins


def save_pins(pins, filename):
    """Saves the pins to a text file"""
    with open(filename, 'w') as file:
        for pin in pins:
            file.write(f'{pin}\n')


def main():
    """Runs the script"""
    filename = 'leaked_pins.txt'
    pins = gen_pins()
    save_pins(pins, filename)
    print(f'Generated: {filename}')


if __name__ == '__main__':
    main()