import collections

from random import choice

from random import shuffle

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

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 suit in self.suits for rank in self.ranks]

# First of two methods needed for immutable sequence protocol

def __len__(self):

return len(self._cards)

# Second of two methods needed for immutable sequence protocol

def __getitem__(self, item):

return self._cards[item]

# Third method to convert immutable sequence protocol to mutable sequence protocol

def __setitem__(self, key, value):

self._cards[key] = value

suit_values = dict(spades=3, hearts=2, diamonds=1, clubs=0)

def spades_high(card):

rank_value = FrenchDeck.ranks.index(card.rank)

return rank_value * len(suit_values) + suit_values[card.suit]

deck = FrenchDeck()

for card in deck:

print(card)

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

print(card)

print(choice(deck))

shuffle(deck)

for card in deck:

print(card)