GPIO example

gistfile1.txt

def down():
    if GPIO.input(7) == False:

        # Turn on the LED
        GPIO.output(13, True)

        # Loop until we're at the bottom
        while GPIO.input(7) == False:
            time.sleep(0.5)

        # Now turn off the light
        GPIO.output(13, False)

        print("You have reached the ground floor.")

    else:
        print("You're already on the ground floor.")

    # Don't call the parent function here, you'll end up recursing.
    # button_select()