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

# Card.py # updated for Bridge with Ace being the greatest # class Card(object): '''A simple playing card. A Card is characterized by two components: rank: an integer value in the range 2-14, inclusive (Two-Ace) suit: a character in 'cdhs' for clubs, diamonds, hearts, and spades.''' #------------------------------------------------------------ SUITS = 'cdhs' SUIT_NAMES = ['Clubs', 'Diamonds', 'Hearts', 'Spades'] RANKS = list(range(2,15)) RANK_NAMES = ['Two', 'Three', 'Four', 'Five', 'Six', 'Seven', 'Eight', 'Nine', 'Ten', 'Jack', 'Queen', 'King', 'Ace'] #------------------------------------------------------------ def __init__(self, rank, suit): '''Constructor pre: rank in range(1,14) and suit in 'cdhs' post: self has the given rank and suit''' self.rank_num = rank self.suit_char = suit #------------------------------------------------------------ def suit(self): '''Card suit post: Returns the suit of self as a single character''' return self.suit_char #------------------------------------------------------------ def rank(self): '''Card rank post: Returns the rank of self as an int''' return self.rank_num #------------------------------------------------------------ def suitName(self): '''Card suit name post: Returns one of ('clubs', 'diamonds', 'hearts', 'spades') corrresponding to self's suit.''' index = self.SUITS.index(self.suit_char) return self.SUIT_NAMES[index] #------------------------------------------------------------ def rankName(self): '''Card rank name post: Returns one of ('ace', 'two', 'three', ..., 'king') corresponding to self's rank.''' index = self.RANKS.index(self.rank_num) return self.RANK_NAMES[index] #------------------------------------------------------------ def __str__(self): '''String representation post: Returns string representing self, e.g. 'Ace of Spades' ''' return self.rankName() + ' of ' + self.suitName() #------------------------------------------------------------ def __eq__(self, other): '''post returns True if two cards are equal, False otherwise''' return (self.suit_char == other.suit_char and self.rank_num == other.rank_num) #------------------------------------------------------------ def __lt__(self, other): '''post: returns True if self < other, False otherwise''' if self.suit_char == other.suit_char: return self.rank_num < other.rank_num else: return self.suit_char < other.suit_char #------------------------------------------------------------ def __ne__(self, other): '''post: returns True if two cards are not equal, False otherwise''' return not(self == other) #------------------------------------------------------------ def __le__(self, other): '''post: returns True if self <= other, False otherwise''' return self < other or self == other