class dog:
def __init__(self,name):
self.name=name
def bulk(self):
print('%s汪汪汪!'%self.name)
d1=dog('小公狗')
d2=dog('小母狗')
d3=dog('狗崽子')
d1.bulk()
d2.bulk()
d3.bulk()
参考:http://www.cnblogs.com/alex3714/articles/5188179.html