[Tutor] Problem with calling class methods stored in a list

[eryksun]

On Thu, Jan 10, 2013 at 7:11 AM, Steven D'Aprano <steve at pearwood.info> wrote:
>
> So, inside the foo() method, do this:
>
>     @classmethod
>     def foo(cls):
>         cls.method_list[0].__get__(cls, None)()

That should be

    cls.method_list[0].__get__(None, cls)()

The way you have it binds the method to type(MyClass), which in this
case is "type" itself. See cm_descr_get in funcobject.c, CPython 2.7
(line 645):

http://hg.python.org/cpython/file/70274d53c1dd/Objects/funcobject.c#l635

Also see the slot wrapper wrap_descr_get for the mapping from None to
NULL (line 4671):

http://hg.python.org/cpython/file/70274d53c1dd/Objects/typeobject.c#l4660