NameError：名稱'a'未定義。使用同一類

Question

裏面我做這個節目的BlackJack另一個函數變量，當我跑了，Python的告訴我這一點：

Traceback (most recent call last): 
    File "<pyshell#17>", line 1, in <module> 
    c2.bj_value() 
    File "/Users/xuanruizhang/Desktop/lab_class_design.py", line 47, in bj_value 
    s = PlayingCard(a,b) 
NameError: name 'a' is not defined 

所以問題是與功能bj_value（個體經營）。我想返回init函數中相應的排名值。 例如：如果C2 =遊戲牌（11， 「C」），然後c2.bj_value（）應返回10

class PlayingCard: 
    def __init__(self, rank, suit): 
     if rank == 1: 
      self.rank = "Ace" 
     elif rank == (2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10): 
      self.rank = rank 
     elif rank == 11: 
      self.rank = "Jack" 
     elif rank == 12: 
      self.rank = "Queen" 
     elif rank == 13: 
      self.rank = "King" 
     if suit == "h": 
      self.suit = "Hearts" 
     elif suit == "s": 
      self.suit = "Spades" 
     elif suit == "c": 
      self.suit = "Clubs" 
     elif suit == "d": 
      self.suit = "Diamonds" 

    def get_rank(self): 
     if self.rank == (2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10): 
      return self.rank 
     elif self.rank == "Ace": 
      return 1 
     elif self.rank == "Jack": 
      return 11 
     elif self.rank == "Queen": 
      return 12 
     elif self.rank == "King": 
      return 13 


    def get_suit(self): 
     if self.suit == "Hearts": 
      return "h" 
     elif self.suit == "Jack": 
      return "j" 
     elif self.suit == "Clubs": 
      return "c" 
     elif self.suit == "Diamonds": 
      return "d" 


    def bj_value(self): 
     s = PlayingCard(a, b) 
     if s.a == 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10: 
      return s.a 
     elif s.a == 11 or 12 or 13: 
      return 10 



    def __repr__(self): 
     return '%s of %s' % (self.rank, self.suit) 

    def main(): 

     if __name__ == '__main__': 
      main() 

謝謝！

Answer 1

無需實例化一個新的類。存儲原始等級值作爲變量（你應該重命名變量存儲名稱值的傑克，女王，bj_value函數內等訪問self.rank：

class PlayingCard: 
    def __init__(self, rank, suit): 
     self.rank = rank 

     if rank == 1: 
      self.card = "Ace" 
     elif rank in range(2, 11): 
      self.card = str(rank) 
     elif rank == 11: 
      self.card = "Jack" 
     elif rank == 12: 
      self.card = "Queen" 
     elif rank == 13: 
      self.card = "King" 
     if suit == "h": 
      self.suit = "Hearts" 
     elif suit == "s": 
      self.suit = "Spades" 
     elif suit == "c": 
      self.suit = "Clubs" 
     elif suit == "d": 
      self.suit = "Diamonds" 

.... 

    def bj_value(self): 
     if self.rank in range(1,11): 
      return self.rank 
     elif self.rank in range(11,14): 
      return 10