How to see the __name__ attribute of a class by using dir()

[Jennie]

The dir() built-in does not show the __name__ attribute of a class:

 >>> '__name__' in Foo.__dict__
False
 >>> Foo.__name__
'Foo'

I implementd my custom __dir__, but the dir() built-in do not want to 
call it:

 >>> class Foo:
...     @classmethod
...     def __dir__(cls):
...         return ['python']
...
 >>> Foo.__dir__()
['python']
 >>> dir(Foo)
['__class__', '__delattr__', '__dict__', ...]

Can someone tell me where is the problem? Thanks a lot in advance
-- 
Jennie