> "harold fellermann" <[EMAIL PROTECTED]> wrote in message
> news:[EMAIL PROTECTED]
> Hi all,
>
> I once read that it is possible to use a python base class for a C
> extension class.
On 14.06.2005, at 09:29, Grigoris Tsolakidis wrote:
> There was good article of how to do this on DDJ home page www.ddj.com
unfortunately, I could not find it yet. I managed to do the following:
I the initmodule function of my extension, I import the module and look
for the class I want to use as a base class:
PyObject *base_module = PyImport_ImportModule("module_name");
if (!base_module) return;
PyObject *base_class = PyMapping_GetItemString(
PyModule_GetDict(base_module,"BaseClass")
);
if (!base_class) return;
This gives me a pointer to the class I want to use as base class.
Does anyone know how to assign this to the extension class? I tried
to build a tuple (BaseClass,) and assign it (after the respective
PyType_Ready call) to CClass.__bases__ like this:
PyObject_SetAttrString(
&cclassType,
"__bases__",
Py_BuildValue("(O,)",base_class)
);
but this raises a TypeError when executed during import:
TypeError: can't set attributes of built-in/extension type
'ext_module.CClass'
Any ideas how to proceed?
- harold -
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You can imagine the opposite
-- Maurizio Nannucci
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