Embedding Python - Deleting a class instance

[Denis S. Otkidach]

On Tue, 21 Jun 2005 12:06:47 GMT
"Bue Krogh Vedel-Larsen" <hesterumpe at tiscali.dk> wrote:

> How do I delete a class instance created using PyInstance_New? I've tried 
> calling Py_CLEAR on the instance, but __del__ isn't called. I've also tried 
> calling PyObject_Del, but this gives an access violation in 
> _PyObject_DebugDumpAddress so I guess that ain't a good idea :)

It is deleted automatically when reference count become zero or when
garbage collector runs if the object contains references to itself.
Just call Py_DECREF on it if you are not going to use it anymore.

> I've noticed that the PyObject returned by PyInstance_New has refcount = 2, 
> does this have any significance?

The code below prints 1:

    PyObject *obj = PyInstance_New(PyExc_Exception, 0, 0);
    std::cerr << obj->ob_refcnt << "\n";

Does it create circular references in constructor?

-- 
Denis S. Otkidach
http://www.python.ru/      [ru]