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class (object):
def shout(self):
print("汪汪叫")
class XTQ(Dog):
def shout(self):
print("哮天犬叫")
class WmDog(Dog):
def shout(self):
print("wmDog shout")
class Person(object):
def __init__(self,name):
self.name = name
def callDog(self, dog):
print("%s 的狗" % (self.name))
dog.shout()
d = XTQ()
p = Person("sanson")
p.callDog(d)
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