class Warenkorb:
    def __init__(self, credit):
        self.__credit = credit
        self.__items = {}

    def addItem(self, item_name: str, price: float):
        self.__items[item_name] = price

    def getItems(self) -> dict:
        return self.__items

    def balance(self) -> float:
        return self.__credit

    def checkout(self) -> bool:
        price = 0
        for _, value in self.__items.items():
            price += value

        works = self.__checkCredit(price)
        self.__credit -= price if works else 0
        if works:
            self.__items = {}
        return works

    def __checkCredit(self, total: float) -> bool:
        return True if total <= self.__credit else False


class AddItemCounterDecorator(Warenkorb):
    def __init__(self, warenkorb: Warenkorb):
        self._warenkorb = warenkorb
        self.__counter = 0

    def __del__(self):
        print(f"ItemCounter: {self.__counter}")

    def addItem(self) -> str:
        self.__counter += 1
        return self._warenkorb.addItem()