Question

Python: Classes :
Can someone tell me why my "Remove Queen of Clubs" is not working in the attached program?

Answer 1

You forgot to attach the program.

Answer 2

Thanks!

Answer 3

When you're storing each card in the deck, what you're storing are card objects, each is a specific instance.

When you create a new one and don't add it to the deck, it's not finding the exact card.

The problem is that it doesn't distinguish between whether a card is the same based on the value, it distinguishes them based on where they're stored in memory.

Here's some console output to demonstrate the differences python sees:
>>> Card("Q", "C")
<__main__.Card object at 0x02BD1ED0>
>>> Card("Q", "C")
<__main__.Card object at 0x02BD1FF0>
>>> Card("Q", "C")
<__main__.Card object at 0x02BD1C10>
>>> Card("Q", "C")
<__main__.Card object at 0x02BD1FB0>
>>> Card("Q", "C")
<__main__.Card object at 0x02BD1ED0>
>>> Card("Q", "C")
<__main__.Card object at 0x02BD1FF0>
Card("Q", "C")


Each of these cards has identical value but the objects are not identical.
To remove a card using the remove function, you need to remove the same card you inserted - the same object from the same address.

You can check every card and remove the one with the correct rank/suit combo.

Here's the code to do that:

def removeCard(self, cardToRemove):
for card in self.cards:
if card.suit == cardToRemove.suit and card.rank == cardToRemove.rank:
self.cards.remove(card)

Answer 4

Thanks. That made complete sense, and worked like a charm.