          self.cards.append(card)
  
      def score(self):
          total_value = 0
          for card in card:
              total_value += card.value
          return total_value
  
  
  class BlackJackHand(Hand):
 
</s> remove     def deal_card():
 </s> add     def deal_card(self): </s> remove         return len(self.cards) - deal_index
 </s> add         return len(self.cards) - self.deal_index
        for card in self.cards:
          self.cards.append(card)
  
      def score(self):
          total_value = 0
        for card in self.cards:
              total_value += card.value
          return total_value
  
  
  class BlackJackHand(Hand):
keep keep keep keep replace keep keep keep keep keep
 Add missing self variables to Deck of Cards solution (#145) 
solutions/object_oriented_design/deck_of_cards/deck_of_cards.py