python类和继承的简单练习

#!/usr/bin/python

#* coding:utf-8 *

class animal(object):
def bar(self):
print ‘animal.bar’

class cat(animal):
def init(self,name):
self.name = name
def bark(self):
print “miaomiao”

class dog(animal):
def init(self,name):
self.name = name
self.breed = ‘dog’
def bark(self):
print “wangwang”

c=cat(‘at’)
c.bark()
d=dog(‘dog’)
d.bark()