Is there a way to make pynput.keyboard count every press (short and long) just once with possibility holding multiple keys at once?

I tried to make simple key counter in python but i found a problem. When i held down a key for a while, it started fast couting cause i held down the key.

from pynput.keyboard import Listener
n = 0
def on_press(key):
    global n
    n += 1
def on_release(key):
    pass
with Listener(on_press=on_press, on_release=on_release) as listener:
    listener.join()

So i made a lock, when im holding a key down, it can't count.

from pynput.keyboard import Listener
pressed = False
n = 0
def on_press(key):
    global n, pressed
    if pressed == False:
        n += 1
        pressed = True
def on_release(key):
    global pressed
    pressed = False
with Listener(on_press=on_press, on_release=on_release) as listener:
        listener.join()

But now when i start typing or playing games, it doesn't count every press, cause im sometimes holding 2 keys at the same time so 1 key isn't counted.

I tried locking after 0.5 seconds key was held down, so it counted every press when i was typing but there was still problem when i held down multiple keys for longer than 0.5 seconds (when i held down multiple keys for longer than 0.5 seconds, it counted only 1).

Is there a way to make it count every press (no matter if its long) just once with possibility holding multiple keys at once?

Your problem can be solved by keeping track which buttons are currently pressed in an array.

from pynput.keyboard import Key, Listener

keys_currently_pressed = []
n = 0

def on_press(key):
    global n
    if key not in keys_currently_pressed:
        keys_currently_pressed.append(key)
        n += 1
        print(key, 'pressed')

def on_release(key):
    global n
    if key in keys_currently_pressed:
        keys_currently_pressed.remove(key)
    print(key, 'released')
    if key == Key.esc:
        print("You pressed", n, "keys")
        return False

with Listener(on_press=on_press, on_release=on_release) as listener:
        listener.join()