Question

我试图创建代表一副牌的类。问题是showDeck方法找不到卡片列表并打印出来：

Traceback (most recent call last):
  File "C:\Users\User\workspace\learn\cards\Deck.py", line 32, in <module>
    newDeck.showDeck()
  File "C:\Users\User\workspace\learn\cards\Deck.py", line 27, in showDeck
    for item in self.cards ():
AttributeError: 'Deck' object has no attribute 'cards'

这是代码：

class Card:
    def __init__(self,sign,number):
        self.number=number  
        self.sign=sign
   #constructor of card class

    def show (self):
        print ("["+str(self.sign)+","+str(self.number)+"]")
    #prints out the card  

class Deck:
    def _init_ (self):
       self.cards=[]
       for i in range (1,4):
           sign=i
           for i in range (1,14):
               number=i
               a=Card(sign,number)
               a.show()
               self.cards.append(a)
     #the constructor of the deck, creates a list, and then creats all the possible cards and adds them to the list          

    def showDeck (self):
        for item in self.cards ():
            item.show
    #prints out the deck

newDeck= Deck()

newDeck.showDeck()

Answer 1

你拼错了Deck.__init__方法：

class Deck:
    def _init_ (self):

在开头和结尾需要两个下划线。 _init_。

你对self.cards类有正确的看法;注意Card两边的下划线数量是多少？

init

python类无法找到自己的属性

1 个答案: