小编Pio*_*ntk的帖子

如何创建一个特殊的方法__repr__，我可以打印，例如，'6 of spades'还是'Q of diamonds'？

如何访问从数据namedtuple，牢记我有一个list的namedtuple以s self._cards？

import collections

cards = collections.namedtuple('Card', ['rank', 'suit'])

class Deck:
    ranks = [str(n) for n in range (2,11)] + list('JQKA')
    suits = 'spades diamonds hearts clubs'.split()

    def __init__(self):
        self._cards = [cards(rank, suit) for suit in self.suits for rank in self.ranks]

    def __len__(self):
        return len(self._cards)

    def __getitem__(self, item):
        return self._cards[item]

    def __repr__(self):
        return '%s of %s' % ()  # <-- don't know …