Chapter 15 of How to Think Like a Computer Scientist
teaches you how to deal with sets of objects by
creating a deck of cards. The tutorial can be found
here: http://www.ibiblio.org/obp/thinkCSpy/chap15.htm.
Here is my code so far in card.py:
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=0):
self.suit = suit
self.rank = rank
def __str__(self):
return (self.rankList[self.rank] + " of " +
self.suitList[self.suit])
def __cmp__(self):
#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
class Deck:
def __init__(self):
self.cards = []
for suit in range(4):
for rank in range(1, 14):
self.cards.append(Card(suit, rank))
def __str__(self):
s = ""
for i in range(len(self.cards)):
s = s + " "*i + str(self.cards[i]) + "\n"
return s
def shuffle(self):
import random
random.shuffle(self.cards)
def removeCard(self, card):
if card in self.cards:
self.cards.remove(card)
return 1
else:
return 0
def popCard(self):
return self.cards.pop()
def isEmpty(self):
return (len(self.cards) == 0)
I get an error message when I use the removeCard
function:
>>> from card import *
>>> deck = Deck()
>>> print deck
Ace of Clubs
2 of Clubs
3 of Clubs
4 of Clubs
etc.
>>> deck.removeCard(Card(0,2))
Traceback (most recent call last):
File "<stdin>", line 1, in ?
File "card.py", line 43, in removeCard
if card in self.cards:
TypeError: __cmp__() takes exactly 1 argument (2
given)
I am confused by this error because I modified __cmp__
in the Card class to take two arguments. Am I missing
something here?
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