在 Python 中打印 Object / Class 的实例

Question

Deck is class with attribute "deck" which is list. This list contains cards. cards is also an object of class Card with attribute suit and rank..

How can I print instance / object deck of class Deck?

class Deck:
    def __init__(self):
        self.deck = []
        for suit in suits:
            for rank in ranks:
                self.deck.append(Card(suit,rank))

Answer 1

You should override repr () or str () function. It depends python version. You can write that you want see data. Then you can use print(Deck() ) or print(instance)

Answer 2

Add this function into you class definition, you can change it for what style you want.

    def __repr__(self):
        return str(self.deck)

Answer 3

on the line after that, use a print function on deck

class Deck:
    def __init__(self):
        self.deck = []
        for suit in suits:
            for rank in ranks:
                self.deck.append(Card(suit,rank))
        print(self.deck)

Then whenever that code is run, which it will be whenever you make a new Deck, it will print deck after