Python: Computer card games are more fun if you can see the images of the cards in a window, as shown in the screen shot in Figure 9-8.

Assume that the 52 images for a deck of cards are in a DECK folder, with the file naming scheme .gif. Thus, for example, the image for the Ace of Hearts is in a file named 1h.gif, and the image for the King of Spades is in a file named 13s.gif. Furthermore, there is an image file named b.gif for the backside image of all the cards. This will be the cards image if its faceup variable is False. Using the DiceDemo program as a role model, write a GUI program that allows you to deal and view cards from a deck. Be sure to define a helper method that takes a Card object as an argument and returns its associated image, and remember to turn the cards as you deal them.

import random

class Card(object): """ A card object with a suit and rank."""

RANKS = (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)

SUITS = ('Spades', 'Diamonds', 'Hearts', 'Clubs')

def __init__(self, rank, suit): """Creates a card with the given rank and suit.""" self.rank = rank self.suit = suit def __str__(self): """Returns the string representation of a card.""" if self.rank == 1: rank = 'Ace' elif self.rank == 11: rank = 'Jack' elif self.rank == 12: rank = 'Queen' elif self.rank == 13: rank = 'King' else: rank = self.rank return str(rank) + ' of ' + self.suit

import random

class Deck(object): """ A deck containing 52 cards."""

def __init__(self): """Creates a full deck of cards.""" self.cards = [] for suit in Card.SUITS: for rank in Card.RANKS: c = Card(rank, suit) self.cards.append(c)

def shuffle(self): """Shuffles the cards.""" random.shuffle(self.cards)

def deal(self): """Removes and returns the top card or None if the deck is empty.""" if len(self) == 0: return None else: return self.cards.pop(0)

def __len__(self): """Returns the number of cards left in the deck.""" return len(self.cards)

def __str__(self): """Returns the string representation of a deck.""" result = '' for c in self.cards: result = self.result + str(c) + ' ' return result

def main(): """A simple test.""" deck = Deck() print("A new deck:") while len(deck) > 0: print(deck.deal()) deck = Deck() deck.shuffle() print("A deck shuffled once:") while len(deck) > 0: print(deck.deal())

if __name__ == "__main__": main()

Cards Demo 0 Cards Demo 2 of Spades Queen of Hearts Deal Shuffle New deck Dea Shuffle New deck Figure 9-8 Viewing images of playing cards 2 GPL 1c.gif 1d.gif 1h.gif 2 2 2d.gif 2h.gif 2s.gif Cards Demo 0 Cards Demo 2 of Spades Queen of Hearts Deal Shuffle New deck Dea Shuffle New deck Figure 9-8 Viewing images of playing cards 2 GPL 1c.gif 1d.gif 1h.gif 2 2 2d.gif 2h.gif 2s.gif