How to make the system take into account only the new keystroke?

Question

Python

It is necessary that the system performs an action on pressing a key.

keys = pg.key.get_pressed()

if keys[pg.K_PAGEUP]:
            if yellowNumber == 2 or yellowNumber == 3:
                yellowNumber -= 1

The system does what it needs, but at the same time, since 60 fps, and each frame keysis updated, in order for the element to move only by 1, you need to press the key for ... 1.67 hundredths of a second, which is physically impossible. And I need to make it so that the system reacts only to a new click

Answer 1

Pressed - changed the state of the variable "last button". Held longer - there was a second pressing. We check if the button matches the contents of the variable "last button" - ignore it.

Answer 2

I don’t know exactly how pygame works, but I assume that when you click, you need to immediately block the button, and then do the calculations, and at the very end, unblock the button.