Python classes inheritance issue

Question

I have the following classes for a game of black jack.

class Player:
 
 def __init__(self, player, balance=0): 
 self.player = player
 self.balance = balance
 
 def __str__(self):
 return f'Player: {self.player}\n Balance: ${self.balance}'
 
 def bet(self):
 print(self.balance)
class Dealer(Player):
 
 def __init__(self): 
 pass

I am trying to call the bet method from Player class through the Dealer class but am getting the following error when I print(self.balance).

AttributeError: 'Dealer' object has no attribute 'balance'

I changed this to print(Player.balance) but this does not work either. Can someone please point me in the right direction?

name = input("Enter your full name: ") 
balance =int(input("Enter the amount you would like to place on the table? "))
 
my_player = Player(name, balance) 
my_dealer = Dealer() 
my_dealer.bet()

• Moinuddin Quadri: __init__ of Dealer overridden the __init__ of Player class
• unaied: AttributeError: 'Dealer' object has no attribute 'balance'
• DisappointedByUnaccountableMod: Because Dealer's __init__() doesn't initialise self.balance, that attribute doesn't exist. You need to either not provide a __init__() method on Dealer (so Player's init is used, i.e. you have to provide player and option balance), or Dealer's __init__() needs to have parameters which call super().__init__() with those params.
• costaparas: Does this answer your question? What does 'super' do in Python?
• khelwood: If your dealer doesn't have a balance, consider having it not be a subclass of player.

Answer 1

Python doesn't automatically call __init__ for super classes. You need to call super in your Dealer class

class Dealer(Player):
 def __init__(self):
 super().__init__(..., ...)
...

In your case, you're not using the Dealer's __init__ so you can remove it completely, in which case it'll inherit its super implementation anyway.

• unaied: I did this which seems to have fixed one part of the issue but when the value of balance is updated and I print the self.balance again it returns the original value and not the updated one
• unaied: can I make the self. balance a global attribute
• Holloway: balance is an attribute of self. How are you updating it?
• unaied: self.balance -= bet_amt
• Holloway: Without seeing the full code I couldn't say why it was not appearing to be updated.

Answer 2

Nice works bro! You just miss a little thing when you inherit a class. At __init__ method, you need to pass a statement: super().__init__(...). In (...), you have to pass all the attributes of the parent class have. After that, you can call the attributes and methods of the parent class.