(Python)

1. Modify the Deck class to keep track of the current size of the deck using an instance variable. Does this change the run-time efficiency of the size operation? Do a bit of research to answer this question. 2. Look into the functions provided by the Python random module to simplify the shuffling code in the Deck class. 3. Suppose we want to be able to place cards back into a deck. Modify the Deck class to include the operations addTop, addBottom, and addRandom (the last one inserts the card at a random location in the deck).

# Deck.py from random import randrange from Card import Card class Deck(object): #------------------------------------------------------------ def __init__(self): """post: Creates a 52 card deck in standard order""" cards = [] for suit in Card.SUITS: for rank in Card.RANKS: cards.append(Card(rank,suit)) self.cards = cards #------------------------------------------------------------ def size(self): """Cards left post: Returns the number of cards in self""" return len(self.cards) #------------------------------------------------------------ def deal(self): """Deal a single card pre: self.size() > 0 post: Returns the next card, and removes it from self.card if the deck is not empty, otherwise returns False""" if self.size() > 0: return self.cards.pop() else: return False #------------------------------------------------------------ def shuffle(self): """Shuffles the deck post: randomizes the order of cards in self""" n = self.size() cards = self.cards for i,card in enumerate(cards): pos = randrange(i,n) cards[i] = cards[pos] cards[pos] = card