1 class Foo:
 2     def __init__(self,x):
 3         self.x=x
 4     def __getattr__(self, item):
 5         print("执行的是我")
 6     def __getattribute__(self, item):
 7         print("我是ibute")
 8         raise AttributeError("哈哈")
 9 
10 f1=Foo(10)
11 f1.x