Changing the passed arguments value after returning from a module

[Jean-Daniel Aussel]

Hi there,

I'm trying to write a C module that changes the values of a passed argument,
which I am sure is a classic problem. The Python script would look as:

    import mymodule
    i=0
    mymodule.test( i )
    print i

where i would hold a meaningful value on return. Problem is I can't figure
out how to do it. This is my latest try, which still does not work:

    static PyObject* sct_tt( PyObject* zself, PyObject* args)
    {
        PyObject* o;
        int i;

        if (!PyArg_ParseTuple(args, "O", o ))
            return NULL;
        PyTuple_SetItem(o, 0, PyInt_FromLong(101L));
        if (PyErr_Occurred()) {
            printf("kaboom!\n");
        }
        result=0;
        return Py_BuildValue("i", result );
    }

Any hints or help would be welcome. Regards,

/jda