Python code

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Add some much-needed error checking to the Blackjack game. Before a new round begins, make sure that the deck has enough cards. If not, repopulate and reshuffle it. I attached the code I have used to make the original blackjack game. ____________________________________________________________________________________________ blackjack.py # Blackjack # From 1 to 7 players compete against a dealer import cards, games class BJ_Card(cards.Card): """ A Blackjack Card. """ ACE_VALUE = 1 @property def value(self): if self.is_face_up: v = BJ_Card.RANKS.index(self.rank) + 1 if v > 10: v = 10 else: v = None return v class BJ_Deck(cards.Deck): """ A Blackjack Deck. """ def populate(self): for suit in BJ_Card.SUITS: for rank in BJ_Card.RANKS: self.cards.append(BJ_Card(rank, suit)) class BJ_Hand(cards.Hand): """ A Blackjack Hand. """ def __init__(self, name): super(BJ_Hand, self).__init__() self.name = name def __str__(self): rep = self.name + ":\t" + super(BJ_Hand, self).__str__() if self.total: rep += "(" + str(self.total) + ")" return rep @property def total(self): # if a card in the hand has value of None, then total is None for card in self.cards: if not card.value: return None # add up card values, treat each Ace as 1 t = 0 for card in self.cards: t += card.value # determine if hand contains an Ace contains_ace = False for card in self.cards: if card.value == BJ_Card.ACE_VALUE: contains_ace = True # if hand contains Ace and total is low enough, treat Ace as 11 if contains_ace and t <= 11: # add only 10 since we've already added 1 for the Ace t += 10 return t def is_busted(self): return self.total > 21 class BJ_Player(BJ_Hand): """ A Blackjack Player. """ def is_hitting(self): response = games.ask_yes_no(" " + self.name + ", do you want a hit? (Y/N): ") return response == "y" def bust(self): print(self.name, "busts.") self.lose() def lose(self): print(self.name, "loses.") def win(self): print(self.name, "wins.") def push(self): print(self.name, "pushes.") class BJ_Dealer(BJ_Hand): """ A Blackjack Dealer. """ def is_hitting(self): return self.total < 17 def bust(self): print(self.name, "busts.") def flip_first_card(self): first_card = self.cards[0] first_card.flip() class BJ_Game(object): """ A Blackjack Game. """ def __init__(self, names): self.players = [] for name in names: player = BJ_Player(name) self.players.append(player) self.dealer = BJ_Dealer("Dealer") self.deck = BJ_Deck() self.deck.populate() self.deck.shuffle() @property def still_playing(self): sp = [] for player in self.players: if not player.is_busted(): sp.append(player) return sp def __additional_cards(self, player): while not player.is_busted() and player.is_hitting(): self.deck.deal([player]) print(player) if player.is_busted(): player.bust() def play(self): # deal initial 2 cards to everyone self.deck.deal(self.players + [self.dealer], per_hand = 2) self.dealer.flip_first_card() # hide dealer's first card for player in self.players: print(player) print(self.dealer) # deal additional cards to players for player in self.players: self.__additional_cards(player) self.dealer.flip_first_card() # reveal dealer's first if not self.still_playing: # since all players have busted, just show the dealer's hand print(self.dealer) else: # deal additional cards to dealer print(self.dealer) self.__additional_cards(self.dealer) if self.dealer.is_busted(): # everyone still playing wins for player in self.still_playing: player.win() else: # compare each player still playing to dealer for player in self.still_playing: if player.total > self.dealer.total: player.win() elif player.total < self.dealer.total: player.lose() else: player.push() # remove everyone's cards for player in self.players: player.clear() self.dealer.clear() def main(): print("\t\tWelcome to Blackjack! ") names = [] number = games.ask_number("How many players? (1 - 7): ", low = 1, high = 8) for i in range(number): name = input("Enter player name: ") names.append(name) print() game = BJ_Game(names) again = None while again != "n": game.play() again = games.ask_yes_no(" Do you want to play again?: ") main() input(" Press the enter key to exit.") ___________________________________________________________________________________________

cards.py

# Cards Module # Basic classes for a game with playing cards

class Card(object): """ A playing card. """ RANKS = ["A", "2", "3", "4", "5", "6", "7", "8", "9", "10", "J", "Q", "K"] SUITS = ["c", "d", "h", "s"]

def __init__(self, rank, suit, face_up = True): self.rank = rank

self.suit = suit self.is_face_up = face_up

def __str__(self): if self.is_face_up: rep = self.rank + self.suit else: rep = "XX" return rep

def flip(self): self.is_face_up = not self.is_face_up

class Hand(object): """ A hand of playing cards. """ def __init__(self): self.cards = []

def __str__(self): if self.cards: rep = "" for card in self.cards: rep += str(card) + "\t" else: rep = "" return rep

def clear(self): self.cards = []

def add(self, card): self.cards.append(card)

def give(self, card, other_hand): self.cards.remove(card) other_hand.add(card)

class Deck(Hand): """ A deck of playing cards. """ def populate(self): for suit in Card.SUITS: for rank in Card.RANKS: self.add(Card(rank, suit))

def shuffle(self): import random random.shuffle(self.cards)

def deal(self, hands, per_hand = 1): for rounds in range(per_hand): for hand in hands: if self.cards: top_card = self.cards[0] self.give(top_card, hand) else: print("Can't continue deal. Out of cards!")

if __name__ == "__main__": print("This is a module with classes for playing cards.") input(" Press the enter key to exit.")

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games.py

# Games # Demonstrates module creation

class Player(object): """ A player for a game. """ def __init__(self, name, score = 0): self.name = name self.score = score

def __str__(self): rep = self.name + ":\t" + str(self.score) return rep

def ask_yes_no(question):

"""Ask a yes or no question.""" response = None while response not in ("y", "n"): response = input(question).lower() return response

def ask_number(question, low, high): """Ask for a number within a range.""" response = None while response not in range(low, high): response = int(input(question)) return response

if __name__ == "__main__": print("You ran this module directly (and did not 'import' it).") input(" Press the enter key to exit.")