Embedding a Numeric array in C

[Chris Fonnesbeck]

Thanks for the help ... well, I now thave the following code:

#include <Python.h>
#include <Numeric/arrayobject.h>


static PyMethodDef numpy_methods[] = {
            {NULL,  NULL}
};

int main() {

        PyObject *pmod, *pdict;
        PyArrayObject *parray;
        char *debug;
        int dimensions[1];
        Py_Initialize();

        debug = "foobar";
        pmod = Py_InitModule("Numeric",numpy_methods);
        import_array();
        printf("%s\n", debug);
        pdict = PyModule_GetDict(pmod);
        printf("%s\n", debug);
        dimensions[0]=10;
        parray = (PyArrayObject
*)PyArray_FromDims(1,dimensions,PyArray_DOUBLE);
        printf("%s\n", debug);
        return 0;
}


However, this segfaults at the PyArray_FromDims() call.  Clearly I am
missing the boat here somewhere.  I also do not see how I can use the
Numeric module without calling Py_InitModule().

Thanks.
cjf

Pete Shinners <shredwheat at attbi.com> wrote in message news:<3CE9D56C.1090007 at attbi.com>...
> Chris Fonnesbeck wrote:
> > I am trying to find out how to properly embed a Numeric array type in
> > C.  The following code compiles, but segfaults when run:
> > 
> > #include <Python.h>
> > #include <pythonrun.h>
> > #include <Numeric/arrayobject.h>
> > 
> > int main() {
> > 
> >         PyObject *pmod;
> >         char *cstr;
> >         Py_Initialize();
> > 
> >         pmod = PyImport_ImportModule("Numeric");
> >         Py_DECREF(pmod);
> >   return 0;
> > 
> > }
> 
> in your "init" function, you need to make a call to "import_array()".
> import_array is actually a 'magic macro' that does a sort of "runtime 
> linking" in python. if you do not make this call, all the C functions from 
> Numeric will only be NULL (and hence a crash)
> 
> no need for the PyImpoert_ImportModule()