__getattr__方法等效 [英] __getattr__ equivalent for methods

问题描述

找不到属性时，将调用object.__getattr__.是否有等效的方法来拦截未定义的方法?

When an attribute is not found object.__getattr__ is called. Is there an equivalent way to intercept undefined methods?

推荐答案

方法也是属性. __getattr__对它们的作用相同:

Methods are attributes too. __getattr__ works the same for them:

class A(object):

  def __getattr__(self, attr):
    print attr

然后尝试:

>>> a = A()
>>> a.thing
thing
>>> a.thing()
thing
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'NoneType' object is not callable

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