Path: csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!weretis.net!feeder4.news.weretis.net!feeds.phibee-telecom.net!newsfeed.xs4all.nl!newsfeed6.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail
Date: Fri, 27 Jan 2012 11:03:57 +0900
From: umedoblock <umedoblock@gmail.com>
User-Agent: Mozilla/5.0 (X11; Linux i686; rv:9.0) Gecko/20111229 Thunderbird/9.0
MIME-Version: 1.0
To: python-list@python.org
Subject: How do I call super() in c extention ?
Content-Type: text/plain; charset=ISO-2022-JP
Content-Transfer-Encoding: 7bit
Precedence: list
Newsgroups: comp.lang.python
Message-ID: <mailman.5147.1327629862.27778.python-list@python.org>
Lines: 82
NNTP-Posting-Host: 2001:888:2000:d::a6
Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:19515

Hi, nice to meet you, everyone.
I'm umedoblock.

I'd like to call super() in c extension.
I'd like to rewrite class Baa as c extension.
Please see below code.
Now, I can make super object.

But I cannot understand how to use super_init(), super_descr_get() and
super_getattro().

Please please help me...

------------------------------------------------------------
baa.py

class Baa(object):
    def __init__(self):
        print('call __init__() in Baa.')
    def sample(self):
        print('call sample() in Baa.')
class Foo(Baa):
    def __init__(self):
        print('call __init__() in Foo.')
        super().sample()
        super().__init__()
class Baz(Foo):
    def __init__(self):
        print('call __init__() in Baz.')
        super().__init__()
--
pyfoo.c

static int
Foo_init(FooObject *self, PyObject *args, PyObject *kwds)
{
    int ret = 0;
    PyTypeObject *super_type = &PySuper_Type;
    PyObject *super_obj;
    PyObject *empty_tuple;

    super_obj = super_type->tp_alloc(super_type, 0);

    empty_tuple = Py_BuildValue("()");
    ret = super_type->tp_init(super_obj, empty_tuple, NULL);

    fprintf(stderr, "super_obj = %p\n", super_obj);
    PyObject_Print((PyObject *)super_obj, stderr, 0); fprintf(stderr,
"\n\n");
    fprintf(stderr, "super_type->tp_init(super_obj=%p, empty_tuple=%p,
NULL)=%d\n", super_obj, empty_tuple, ret);

    return 0;
}

PyMODINIT_FUNC
PyInit__foo(void)
{
    PyObject *m;
    PyObject *import_baa = NULL, *Baa = NULL;
    PyObject *Baa_str;

    import_baa = PyImport_ImportModule("baa");
    Baa_str = Py_BuildValue("s", "Baa");
    Baa = PyObject_GetAttr(import_baa, Baa_str);
    Foo_Type.tp_base = (struct _typeobject *)Baa;
    Py_INCREF(Foo_Type.tp_base);

    Foo_Type.tp_new = Foo_new;
    if (PyType_Ready(&Foo_Type) < 0)
        return NULL;
    Py_INCREF(&Foo_Type);

    m = PyModule_Create(&Foo_module);
    if (m == NULL)
        return NULL;
    PyModule_AddObject(m, "Foo", (PyObject *)&Foo_Type);

    PyModule_AddStringConstant(m, "CONST", "C_EXTENSION");

    return m;
}