僅在指定了一個對象時將對象添加到多個對象類屬性

Question

我正在嘗試編寫一個處理卡片的程序，並且我遇到問題，即當我將卡片對象交給一個玩家時，所有玩家都會在其課程中收到對象屬性「手」。

代碼如下，任何幫助表示讚賞！我道歉，如果我沒有正確地遵循stackoverflow縮進格式。這是我第一次發佈一個問題。

import random 

    class Player(object): 
     def __init__(self,name,balance=100,hand=[]): 
      self.name = name 
      self.balance = balance 
      self.hand = hand 

     def reveal_all(self): 
      ''' 
      This method prints out a player's hand. 
      ''' 
      reveal = [] 
      for x in self.hand: 
       reveal = reveal + [x.name] 
      print(reveal) 

    class Card(object): 
     def __init__(self,name,val): 
      self.name = name 
      self.val = val 

    card_ob1 = Card('2 of Hearts',2) 
    card_ob2 = Card('3 of Hearts',3) 
    card_ob3 = Card('4 of Hearts',4) 
    card_ob4 = Card('5 of Hearts',5) 
    card_ob5 = Card('6 of Hearts',6) 
    card_ob6 = Card('7 of Hearts',7) 
    card_ob7 = Card('8 of Hearts',8) 
    card_ob8 = Card('9 of Hearts',9) 

    deck = [card_ob1,card_ob2,card_ob3,card_ob4,card_ob5,card_ob6,card_ob7,card_ob8] 

    def plyr1_geta_card(): 
     card = random.choice(deck) 
     player1obj.hand += [card] 
     deck.remove(card) 

    def dealer_geta_card(): 
     card = random.choice(deck) 
     dealerobj.hand.append(card) 
     deck.remove(card) 

    player1obj = Player('Me',100) 
    dealerobj = Player('The House') 

    # Player 1 gets a card 
    plyr1_geta_card() 

    # The card is added to both the dealer and player hand attribute for some reason! 
    dealerobj.reveal_all() 

    player1obj.reveal_all() 

Answer 1

的問題來自於您的播放器對象的__init__，在你的方式，hand將播放器的所有實例中共享：如可以在第9.3.5. Class and Instance Variableshttps://docs.python.org/3/tutorial/classes.html可以看出。速戰速決應該

def __init__(self,name,balance=100,hand=[]): 
     self.hand = [] 
     self.name = name 
     self.balance = balance 
     self.hand.extend(hand) 

順便說一句，這不是寫功能卡添加到玩家喜歡你所做的一個很好的做法，相反，它應該是收到這樣的球員對象的函數：

def plyr_geta_card(player): 
    card = random.choice(deck) 
    player.hand.append(card) 
    deck.remove(card)