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Breeds of dogs with constructors

Code listing

class Dog:

  def __init__(self):
    self.height = 4

  def bark(self):
    print "woof"

  def wag(self):
    print "wag wag wag"

class Dachshund(Dog):

  def __init__(self):
    self.height = 1

  def dig(self):
    print "dig dig dig"

  def bark(self):
    print "arf arf"

class Collie(Dog):
  def rescue(self, person):
    print "Come quickly, " + person + " fell down the mineshaft"

Command area transcript

>>> lassie = Collie()
>>> lassie.height
4
>>> pickles = Dachshund()
>>> pickles.height
1
>>> lassie.bark()
woof
>>> pickles.bark()
arf arf
>>> pickles.dig()
dig dig dig
>>> lassie.dig()
The error was:dig
Attribute not found.
You are trying to access a part of the object that doesn't exist.
AttributeError: dig
>>> 

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• Spring 2007 materials last edited on 21 August 2007 at 10:44 pm by user-1121vkp.dsl.mindspring.com