class Menu:
    hotdog = 10
    hamburger = 10

    def __init__(self) -> None:
        self.hotdog = 10
        self.hamburger = 10


class SlotsMenu:
    __slots__ = ('hotdog', 'hamburger', 'cheeseburger')

    def __init__(self) -> None:
        self.hotdog = 10
        self.hamburger = 10

    def __get__(self, instance):
        print(f"DEBUG: looked up {instance}")

if __name__ == '__main__':
    menu = Menu()

    print(f"cost of hamburger = {menu.hamburger}")
    menu.__dict__['hamburger'] = 1
    print(f"new cost of hamburger = {menu.hamburger}")

    slotsmenu = SlotsMenu()

    print(f"cost of hamburger = {slotsmenu.hamburger}")
    slotsmenu.cheeseburger = 1
    print(f"cost of cheeseburger: {slotsmenu.cheeseburger=}")
    #slotsmenu.__dict__['hamburger'] = 1
    print(f"new cost of hamburger = {slotsmenu.hamburger}")