class Card:
	"""A single card is represented by a rank and suit.
	
	Rank ranges between 0 and 12, and suit between 0 and 3.
	The representation for rank and suit are mapped through
	class variables, as is the value for rank."""

	RankRepr = [ 'A', '2', '3', '4', '5', '6', '7', '8', '9',
			'10', 'J', 'Q', 'K' ]
	SuitRepr = [ 'S', 'H', 'D', 'C' ]
	RankValue = [ [ 1, 11 ], 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 10, 10 ]

	def __init__(self, rank, suit):
		"Create card of suit and rank."

		self._rank = rank
		self._suit = suit

	def __str__(self):
		return '%s%s' % (self.RankRepr[self._rank],
					self.SuitRepr[self._suit])

	def rank(self):
		return self.RankRepr[self._rank]

	def value(self):
		return self.RankValue[self._rank]

	def suit(self):
		return self.SuitRepr[self._suit]

class Deck:
	"""A deck consists of 13 cards in 4 suits."""

	def __init__(self):
		"Create all cards using all rank and suit representations."

		self.cards = []
		for rank in range(len(Card.RankRepr)):
			for suit in range(len(Card.SuitRepr)):
				card = Card(rank, suit)
				self.cards.append(card)
		self.nextCard = 0

	def shuffle(self):
		"Put all cards back in deck and rearrange order."

		import random
		cards = []
		while len(self.cards) > 1:
			card = random.choice(self.cards)
			cards.append(card)
			self.cards.remove(card)
		cards.append(self.cards[0])
		self.cards = cards
		self.nextCard = 0

	def remaining(self):
		"Returns number of unused cards remaining in deck."

		return len(self.cards) - self.nextCard

	def deal(self):
		"Remove top card in deck."

		card = self.cards[self.nextCard]
		self.nextCard = self.nextCard + 1
		return card

if __name__ == '__main__':
	def printDeck(deck):
		for r in range(13):
			for s in range(4):
				print deck.deal(),
			print
	deck = Deck()
	printDeck(deck)
	print
	deck.shuffle()
	printDeck(deck)
	print
	printDeck(deck)