fluent Python

1.1 Python风格的纸牌

Python collections模块中的内置模块：namedtuple
https://www.liaoxuefeng.com/wiki/001374738125095c955c1e6d8bb493182103fac9270762a000/001411031239400f7181f65f33a4623bc42276a605debf6000

import collections

Card = collections.namedtuple('Card',['rank','suit']) # Card对象 可以调用rank和suit方法
class FrenchDeck:
    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]   

deck = FrenchDeck()
print(len(deck))    
print(deck[0])