《流畅的python》这本确实老辣

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 collections
from random import choice

Card = 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(', '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)
    pass
for card in reversed(deck):
    # print(card)
    pass

print(Card('Q', 'hearts') in deck)
', 'beats') in deck)

for card in sorted(deck, key=spades_high):
    # print(card)
    pass

输出：

Card(rank=', suit='diamonds')

Card(rank=', suit='spades')
Card(rank='A', suit='hearts')
Card(rank=', suit='hearts')
[Card(rank=', suit='spades')]
[Card(rank='A', suit='spades'), Card(rank='A', suit='diamonds'), Card(rank='A', suit='clubs'), Card(rank='A', suit='hearts')]
True
False

Process finished with exit code