| 1234567891011121314151617181920212223242526272829303132333435363738 | from .product import productfrom .product import product_factoryclass product_builder:    def __init__(self, target: product | None = None) -> None:        self.__target = target        if self.__target is None:            self.__target = product()    def modify(self, target: dict) -> object:        factory = product_factory(self.__target)        if "name" in target:            factory.name = target["name"]        if "description" in target:            factory.description = target["description"]        if "author" in target:            factory.author = target["author"]        if "image" in target:            factory.image = target["image"]        if "stock_count" in target:            factory.stock_count = int(target["stock_count"])        if "barcode" in target:            factory.barcode = target["barcode"]        self.__target = factory.result            return self    @property    def result(self) -> product:        return self.__target
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