最近在慢慢看几页，

第一章的示例代码，实现一副扑克牌。

确实老辣~

不是高手，没有这感觉，我慢慢学吧。

import collectionsfrom random import choiceCard = collections.namedtuple('Card', ['rank', 'suit'])class FrechDeck:    ranks = [str(n) for n in range(2, 11)] + list('JQKA')    suits = 'spades diamonds clubs hearts'.split()    def __init__(self):        self._cards = [Card(rank, suit) for suit in self.suits                       for rank in self.ranks]    def __len__(self):        return len(self._cards)    def __getitem__(self, position):        return self._cards[position]suit_values = dict(spades=3, hearts=2, diamonds=3, clubs=4)def spades_high(card):    rank_value = FrechDeck.ranks.index(card.rank)    return rank_value * len(suit_values) + suit_values[card.suit]beer_card = Card('7', 'diamonds')print(beer_card)deck = FrechDeck()print(len(deck))print(deck[0])print(deck[-1])print(choice(deck))print(deck[:3])print(deck[12::13])for card in deck:    # print(card)    passfor card in reversed(deck):    # print(card)    passprint(Card('Q', 'hearts') in deck)print(Card('7', 'beats') in deck)for card in sorted(deck, key=spades_high):    # print(card)    pass

输出：

Card(rank='7', suit='diamonds')52Card(rank='2', suit='spades')Card(rank='A', suit='hearts')Card(rank='7', suit='hearts')[Card(rank='2', suit='spades'), Card(rank='3', suit='spades'), Card(rank='4', suit='spades')][Card(rank='A', suit='spades'), Card(rank='A', suit='diamonds'), Card(rank='A', suit='clubs'), Card(rank='A', suit='hearts')]TrueFalseProcess finished with exit code 0