python - 无法通过类继承正确使用另一个类的函数

Question

我正在尝试使用 Card 类中的 card_number() 和 card_suit() 方法来确定 Rules 类中的 last_card 花色和号码

class Card:

    def __init__(self, card):
        self.card = card
        self.number = self.card_number(card)
        self.suit = self.card_suit(card)

    def card_number(self, card):
        card = self.card
        number = card[0]
        return number


    def card_suit(self, card):
        card = self.card
        suit = card[-1]
        return suit

class Rules(Card):

    def __init__(self, last_card, card):
        Card.__init__(self, card)
        self.last_card = last_card
        self.last_card_number = self.card_number(self.last_card)
        self.last_card_suit = self.card_suit(self.last_card)

看起来，当我访问该功能时，他们保存卡片并仅适用于卡片变量，也在最后一张卡片中

现在我得到:

a = Rules(last_card="As", card = "5c")
print(a.card) -> "5c"
print(a.number)-> "5"
print(a.suit) -> "c"

print("last_card")
print(a.last_card) -> "As"
print(a.last_card_number) -> "5"
print(a.last_card_suit) -> "c"

我期待:

a = Rules(last_card="As", card = "5c")
print(a.card) -> "5c"
print(a.number)-> "5"
print(a.suit) -> "c"

print("last_card")
**print(a.last_card) -> "As"
print(a.last_card_number) -> "A"
print(a.last_card_suit) -> "s"**

Answer 1

正如我在评论中提到的，当您需要 Rules 来保存时，您不需要 Rules 成为 Card 的父类(super class)Card 的两个实例

您可以修改您的类来实现这一点，如下所示

class Card:

    #Instantiating instance attributes
    def __init__(self, card):
        self.card = card
        self.number = self.card[0]
        self.suit = self.card[-1]

class Rules:

    #Two instances of Card class
    def __init__(self, last_card, card):
        self.last_card = Card(last_card)
        self.card = Card(card)

a = Rules(last_card="As", card = "5c")
print(a.card.card)
print(a.card.number)
print(a.card.suit)

print(a.last_card.card)
print(a.last_card.number)
print(a.last_card.suit)

输出将是

5c
5
c
As
A
s

您甚至可以摆脱 Rules 类并创建 Card 类的两个实例，然后使用它们

last_card = Card('As')
card = Card('5c')