from pynput import mouse
from AppKit import NSScreen

def get_screen_size():
    screen = NSScreen.mainScreen()
    frame = screen.frame()
    width = int(frame.size.width)
    height = int(frame.size.height)
    return width, height


def on_move(x, y):
    w, h = get_screen_size()
    print(128*x/w)
    print(128*y/h)

with mouse.Listener(on_move=on_move) as listener:
    listener.join()