派生クラスからクラスを派生させる

Question

私は3クラス（City,Neighborhood、およびBlock）を持っています。ここで

はCityクラスの定義です：Neighborhoodの

class City: 
    def __init__(self, id_city, name_city): 
     self.__id = id_city 
     self.__name = name_city 

定義：Blockの

class Neighborhood(City): 
    def __init__(self, id_neighborhood, name_neighborhood, number_block, *city_args, **kwargs): 
     City.__init__(self, *city_args, **kwargs) 
     self.__id = id_neighborhood 
     self.__name = name_neighborhood 
     self.__number = number_block 

が定義：

class Block(Neighborhood): 
    def __init__(self, id_block, number_block, number_flats, *neighborhood_args, **kwargs): 
     Neighborhood.__init__(*neighborhood_args, **kwargs) 
     self.__id = id_block 
     self.__number_b = number_block 
     self.__number_f = number_flats 

その後、私は実体を宣言します。

city = City(5, "New York") 
neighborhood = Neighborhood(1, "Brooklyn", 500, 5, "New York") 
block = Block(11, 2, 20, 1, "Brooklyn", 500, 5, "New York") 

そして、このエラーが出ます：

AttributeError: 'int' object has no attribute '_City__id' 

Answer 1

あなたBlock.__init__()実装でselfに渡すのを忘れ：

Neighborhood.__init__(*neighborhood_args, **kwargs) 

そうに渡された最初の引数ではなく整数です。今Neighbourhood.__init__()はにバインドされたselfを持っており、エラーが発生します。単純に追加してくださいself：

class Block(Neighborhood): 
    def __init__(self, id_block, number_block, number_flats, *neighborhood_args, **kwargs): 
     Neighborhood.__init__(self, *neighborhood_args, **kwargs)