The program below has an error. The error occurs in section 15.6 of this program

Question

The program below has an error. The error occurs in section 15.6 of this program. It should print out all of the cards in the deck like this >>> deck = Deck() >>> print deck Ace of Clubs 2 of Clubs 3 of Clubs 4 of Clubs 5 of Clubs 6 of Clubs 7 of Clubs 8 of Clubs 9 of Clubs 10 of Clubs Jack of Clubs Queen of Clubs King of Clubs Ace of Diamonds here is the error I get Traceback (most recent call last):   File "G:/Class/Module 5/Module 5 Case/ThinkCSpy/Chapter 15/Chapter 15 examples new fixed.py", line 68, in <module>    print deck   File "G:/Class/Module 5/Module 5 Case/ThinkCSpy/Chapter 15/Chapter 15 examples new fixed.py", line 63, in __str__    for i in range(len(self.cards)): AttributeError: Deck instance has no attribute 'cards' here is the program with the error. The error is in section 15.7 I will award you 140 points if you fix this program and make it run with no errors in Python IDLE ---------------------------------------------
# -*- coding: utf-8 -*- # 15.2 class Card:    def __init__(self, suit=0, rank=2):    self.suit = suit    self.rank = rank    threeOfClubs = Card(3, 1)
# 15.3 class Card:    suitList = ["Clubs", "Diamonds", "Hearts", "Spades"]    rankList = ["narf", "Ace", "2", "3", "4", "5", "6", "7",    "8", "9", "10", "Jack", "Queen", "King"]    def __init__(self, suit=0, rank=2):    self.suit = suit    self.rank = rank    #init method omitted    def __str__(self):    return (self.rankList[self.rank] + " of " +    self.suitList[self.suit])    card1 = Card(1, 11) print card1
card2 = Card(1, 3) print card2 print card2.suitList[1] card1.suitList[1] = "Swirly Whales" print card1 print card2
# 15.4 def __cmp__(self, other):    # check the suits    if self.suit > other.suit: return 1    if self.suit < other.suit: return -1    # suits are the same... check ranks    if self.rank > other.rank: return 1    if self.rank < other.rank: return -1    # ranks are the same... it’s a tie    return 0
# 15.5 class Deck:    def __init__(self):    self.cards = []    for suit in range(4):    for rank in range(1, 14):    self.cards.append(Card(suit, rank))
# 15.6 class Deck: # ...    def printDeck(self):    for card in self.cards:    print card
class Deck: # ...    def __str__(self):    s = ""    for i in range(len(self.cards)):    s = s + " "*i + str(self.cards[i]) + " "    return s
deck = Deck() print deck
# 15.7 random.randrange(0, len(self.cards)) class Deck: # ...    def shuffle(self):    import random    nCards = len(self.cards)    for i in range(nCards):    j = random.randrange(i, nCards)    self.cards[i], self.cards[j] = self.cards[j], self.cards[i] self.cards[i], self.cards[j] = self.cards[j], self.cards[i]
# 15.8 class Deck: # ...    def removeCard(self, card):    if card in self.cards:    self.cards.remove(card)    return True    else:    return False
class Deck: # ...    def popCard(self):    return self.cards.pop()
class Deck: # ...    def isEmpty(self):    return (len(self.cards) == 0)
# 15.9 Glossary # # Encode: To represent one set of values using another set of values by constructing # a mapping between them. # # Class Attribute: A variable that is de?ned inside a class de?nition but outside # any method. Class attributes are accessible from any method in the class # and are shared by all instances of the class. # # Accumulator: A variable used in a loop to accumulate a series of values, such as # by concatenating them onto a string or adding them to a running sum. # The program below has an error. The error occurs in section 15.6 of this program. It should print out all of the cards in the deck like this >>> deck = Deck() >>> print deck Ace of Clubs 2 of Clubs 3 of Clubs 4 of Clubs 5 of Clubs 6 of Clubs 7 of Clubs 8 of Clubs 9 of Clubs 10 of Clubs Jack of Clubs Queen of Clubs King of Clubs Ace of Diamonds here is the error I get Traceback (most recent call last):   File "G:/Class/Module 5/Module 5 Case/ThinkCSpy/Chapter 15/Chapter 15 examples new fixed.py", line 68, in <module>    print deck   File "G:/Class/Module 5/Module 5 Case/ThinkCSpy/Chapter 15/Chapter 15 examples new fixed.py", line 63, in __str__    for i in range(len(self.cards)): AttributeError: Deck instance has no attribute 'cards' here is the program with the error. The error is in section 15.7 I will award you 140 points if you fix this program and make it run with no errors in Python IDLE ---------------------------------------------
# -*- coding: utf-8 -*- # 15.2 class Card:    def __init__(self, suit=0, rank=2):    self.suit = suit    self.rank = rank    threeOfClubs = Card(3, 1)
# 15.3 class Card:    suitList = ["Clubs", "Diamonds", "Hearts", "Spades"]    rankList = ["narf", "Ace", "2", "3", "4", "5", "6", "7",    "8", "9", "10", "Jack", "Queen", "King"]    def __init__(self, suit=0, rank=2):    self.suit = suit    self.rank = rank    #init method omitted    def __str__(self):    return (self.rankList[self.rank] + " of " +    self.suitList[self.suit])    card1 = Card(1, 11) print card1
card2 = Card(1, 3) print card2 print card2.suitList[1] card1.suitList[1] = "Swirly Whales" print card1 print card2
# 15.4 def __cmp__(self, other):    # check the suits    if self.suit > other.suit: return 1    if self.suit < other.suit: return -1    # suits are the same... check ranks    if self.rank > other.rank: return 1    if self.rank < other.rank: return -1    # ranks are the same... it’s a tie    return 0
# 15.5 class Deck:    def __init__(self):    self.cards = []    for suit in range(4):    for rank in range(1, 14):    self.cards.append(Card(suit, rank))
# 15.6 class Deck: # ...    def printDeck(self):    for card in self.cards:    print card
class Deck: # ...    def __str__(self):    s = ""    for i in range(len(self.cards)):    s = s + " "*i + str(self.cards[i]) + " "    return s
deck = Deck() print deck
# 15.7 random.randrange(0, len(self.cards)) class Deck: # ...    def shuffle(self):    import random    nCards = len(self.cards)    for i in range(nCards):    j = random.randrange(i, nCards)    self.cards[i], self.cards[j] = self.cards[j], self.cards[i] self.cards[i], self.cards[j] = self.cards[j], self.cards[i]
# 15.8 class Deck: # ...    def removeCard(self, card):    if card in self.cards:    self.cards.remove(card)    return True    else:    return False
class Deck: # ...    def popCard(self):    return self.cards.pop()
class Deck: # ...    def isEmpty(self):    return (len(self.cards) == 0)
# 15.9 Glossary # # Encode: To represent one set of values using another set of values by constructing # a mapping between them. # # Class Attribute: A variable that is de?ned inside a class de?nition but outside # any method. Class attributes are accessible from any method in the class # and are shared by all instances of the class. # # Accumulator: A variable used in a loop to accumulate a series of values, such as # by concatenating them onto a string or adding them to a running sum. # The program below has an error. The error occurs in section 15.6 of this program. It should print out all of the cards in the deck like this >>> deck = Deck() >>> print deck Ace of Clubs 2 of Clubs 3 of Clubs 4 of Clubs 5 of Clubs 6 of Clubs 7 of Clubs 8 of Clubs 9 of Clubs 10 of Clubs Jack of Clubs Queen of Clubs King of Clubs >>> deck = Deck() >>> print deck Ace of Clubs 2 of Clubs 3 of Clubs 4 of Clubs 5 of Clubs 6 of Clubs 7 of Clubs 8 of Clubs 9 of Clubs 10 of Clubs Jack of Clubs Queen of Clubs King of Clubs Ace of Diamonds here is the error I get Traceback (most recent call last):   File "G:/Class/Module 5/Module 5 Case/ThinkCSpy/Chapter 15/Chapter 15 examples new fixed.py", line 68, in <module>    print deck   File "G:/Class/Module 5/Module 5 Case/ThinkCSpy/Chapter 15/Chapter 15 examples new fixed.py", line 63, in __str__    for i in range(len(self.cards)): AttributeError: Deck instance has no attribute 'cards' here is the program with the error. The error is in section 15.7 I will award you 140 points if you fix this program and make it run with no errors in Python IDLE   File "G:/Class/Module 5/Module 5 Case/ThinkCSpy/Chapter 15/Chapter 15 examples new fixed.py", line 68, in <module>    print deck   File "G:/Class/Module 5/Module 5 Case/ThinkCSpy/Chapter 15/Chapter 15 examples new fixed.py", line 63, in __str__    for i in range(len(self.cards)): AttributeError: Deck instance has no attribute 'cards' here is the program with the error. The error is in section 15.7 I will award you 140 points if you fix this program and make it run with no errors in Python IDLE ---------------------------------------------
# -*- coding: utf-8 -*- # 15.2 class Card:    def __init__(self, suit=0, rank=2):    self.suit = suit    self.rank = rank    threeOfClubs = Card(3, 1)
# 15.3 class Card:    suitList = ["Clubs", "Diamonds", "Hearts", "Spades"]    rankList = ["narf", "Ace", "2", "3", "4", "5", "6", "7",    "8", "9", "10", "Jack", "Queen", "King"]    def __init__(self, suit=0, rank=2):    self.suit = suit    self.rank = rank    #init method omitted    def __str__(self):    return (self.rankList[self.rank] + " of " +    self.suitList[self.suit])    card1 = Card(1, 11) print card1
card2 = Card(1, 3) print card2 print card2.suitList[1] card1.suitList[1] = "Swirly Whales" print card1 print card2
# 15.4 def __cmp__(self, other):    # check the suits    if self.suit > other.suit: return 1    if self.suit < other.suit: return -1    # suits are the same... check ranks    if self.rank > other.rank: return 1    if self.rank < other.rank: return -1    # ranks are the same... it’s a tie    return 0
# 15.5 class Deck:    def __init__(self):    self.cards = []    for suit in range(4):    for rank in range(1, 14):    self.cards.append(Card(suit, rank))
# 15.6 class Deck: # ...    def printDeck(self):    for card in self.cards:    print card
class Deck: # ...    def __str__(self):    s = ""    for i in range(len(self.cards)):    s = s + " "*i + str(self.cards[i]) + " "    return s
deck = Deck() print deck
# 15.7 random.randrange(0, len(self.cards)) class Deck: # ...    def shuffle(self):    import random    nCards = len(self.cards)    for i in range(nCards):    j = random.randrange(i, nCards)    self.cards[i], self.cards[j] = self.cards[j], self.cards[i] self.cards[i], self.cards[j] = self.cards[j], self.cards[i]
# 15.8 class Deck: # ...    def removeCard(self, card):    if card in self.cards:    self.cards.remove(card)    return True    else:    return False
class Deck: # ...    def popCard(self):    return self.cards.pop()
class Deck: # ...    def isEmpty(self):    return (len(self.cards) == 0)
# 15.9 Glossary # # Encode: To represent one set of values using another set of values by constructing # a mapping between them. # # Class Attribute: A variable that is de?ned inside a class de?nition but outside # any method. Class attributes are accessible from any method in the class # and are shared by all instances of the class. # # Accumulator: A variable used in a loop to accumulate a series of values, such as # by concatenating them onto a string or adding them to a running sum. # # -*- coding: utf-8 -*- # 15.2 class Card:    def __init__(self, suit=0, rank=2):    self.suit = suit    self.rank = rank    threeOfClubs = Card(3, 1)
# 15.3 class Card:    suitList = ["Clubs", "Diamonds", "Hearts", "Spades"]    rankList = ["narf", "Ace", "2", "3", "4", "5", "6", "7",    "8", "9", "10", "Jack", "Queen", "King"]    def __init__(self, suit=0, rank=2):    self.suit = suit    self.rank = rank    #init method omitted    def __str__(self):    return (self.rankList[self.rank] + " of " +    self.suitList[self.suit])    card1 = Card(1, 11) print card1
card2 = Card(1, 3) print card2 print card2.suitList[1] card1.suitList[1] = "Swirly Whales" print card1 print card2
# 15.4 def __cmp__(self, other):    # check the suits    if self.suit > other.suit: return 1    if self.suit < other.suit: return -1    # suits are the same... check ranks    if self.rank > other.rank: return 1    if self.rank < other.rank: return -1    # ranks are the same... it’s a tie    return 0
# 15.5 class Deck:    def __init__(self):    self.cards = []    for suit in range(4):    for rank in range(1, 14):    self.cards.append(Card(suit, rank))
# 15.6 class Deck: # ...    def printDeck(self):    for card in self.cards:    print card
class Deck: # ...    def __str__(self):    s = ""    for i in range(len(self.cards)):    s = s + " "*i + str(self.cards[i]) + " "    return s
deck = Deck() print deck
# 15.7 random.randrange(0, len(self.cards)) class Deck: # ...    def shuffle(self):    import random    nCards = len(self.cards)    for i in range(nCards):    j = random.randrange(i, nCards)    self.cards[i], self.cards[j] = self.cards[j], self.cards[i] self.cards[i], self.cards[j] = self.cards[j], self.cards[i]
# 15.8 class Deck: # ...    def removeCard(self, card):    if card in self.cards:    self.cards.remove(card)    return True    else:    return False
class Deck: # ...    def popCard(self):    return self.cards.pop()
class Deck: # ...    def isEmpty(self):    return (len(self.cards) == 0)
# 15.9 Glossary # # Encode: To represent one set of values using another set of values by constructing # a mapping between them. # # Class Attribute: A variable that is de?ned inside a class de?nition but outside # any method. Class attributes are accessible from any method in the class # and are shared by all instances of the class. # # Accumulator: A variable used in a loop to accumulate a series of values, such as # by concatenating them onto a string or adding them to a running sum. #

Explanation / Answer

Hi, I did some correction in the code and find the same below. You will get the output as you expected. You may get error regarding random at the end and you can resolve the by making random mudule available for the code. # -*- coding: utf-8 -*- # 15.2 class Card: def __init__(self, suit=0, rank=2): self.suit = suit self.rank = rank threeOfClubs = Card(3, 1) # 15.3 class Card: suitList = ["Clubs", "Diamonds", "Hearts", "Spades"] rankList = ["narf", "Ace", "2", "3", "4", "5", "6", "7", "8", "9", "10", "Jack", "Queen", "King"] def __init__(self, suit=0, rank=2): self.suit = suit self.rank = rank #init method omitted def __str__(self): return (self.rankList[self.rank] + " of " + self.suitList[self.suit]) card1 = Card(1, 11) print card1 card2 = Card(1, 3) print card2 print card2.suitList[1] card1.suitList[1] = "Swirly Whales" print card1 print card2 # 15.4 def __cmp__(self, other): # check the suits if self.suit > other.suit: return 1 if self.suit other.rank: return 1 if self.rank

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