py_多态

class Dog(object):
    def print_self(self):
        print("大家好，我是xxx，请多多关照。。")
class Xiaotq(Dog):
    def print_self(self):
        temp.print_self()#执行语句随输入而变

dog1 = Dog()
dog2 = Xiaotq()

introduce(dog1)
introduce(dog2)