getattribute 
-> 如果没有找到属性，则引发异常AttributeError 
-> AttributeError 异常会触发 getattr，如果没有实现getattr 则抛出异常

# -*- coding: utf-8 -*-

class Dog(object):
    def __getattribute__(self, item):
        print("getattribute: {}".format(item))
        return super(Dog, self).__getattribute__(item)

    def __getattr__(self, item):
        print("getattr: {}".format(item))
        return self.default

    def eat(self):
        print("eat")

    def default(self):
        print("default")


def main():
    demo = Dog()
    demo.eat()
    demo.sleep()  # AttributeError


if __name__ == '__main__':
    main()
"""
getattribute: eat
eat

getattribute: sleep
getattr: sleep
getattribute: default
default

"""