[Python-Dev] Are PyCFunctions supposed to invisibly consume self when used as a method?

Sun Jun 13 01:15:08 CEST 2010

Hey! No borrowing the time machine! :-)
On Sat, Jun 12, 2010 at 4:03 PM, Christian Heimes <lists at cheimes.de> wrote:
>> method or instancemethod perhaps?
>> The necessary code is already in Python 3.0's code base. I've added in
> in r56469 as requested in my issue http://bugs.python.org/issue1587. It
> seems we had this very discussion over two and a half year ago.
>> Index: Python/bltinmodule.c
> ===================================================================
> --- Python/bltinmodule.c        (Revision 81963)
> +++ Python/bltinmodule.c        (Arbeitskopie)
> @@ -2351,6 +2351,7 @@
>     SETBUILTIN("frozenset",             &PyFrozenSet_Type);
>     SETBUILTIN("property",              &PyProperty_Type);
>     SETBUILTIN("int",                   &PyLong_Type);
> +    SETBUILTIN("instancemethod",        &PyInstanceMethod_Type);
>     SETBUILTIN("list",                  &PyList_Type);
>     SETBUILTIN("map",                   &PyMap_Type);
>     SETBUILTIN("object",                &PyBaseObject_Type);
>>>>>> class Example:
> ...     iid = instancemethod(id)
> ...     id = id
> ...
>>>> Example().id()
> Traceback (most recent call last):
>  File "<stdin>", line 1, in <module>
> TypeError: id() takes exactly one argument (0 given)
>>>> Example().iid()
> 139941157882144
>> Christian
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-- 
--Guido van Rossum (python.org/~guido)