流畅的python第一章

纸牌排序

import collections

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

class French:
    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 rank in self.ranks 
                                                  for suit in self.suits]
    def __len__(self):
        return len(self._cards)
    
    def __getitem__(self, position):
        return self._cards[position]