David Cournapeau wrote:
> Hi,
>
> I would like to convert a double array to an *existing* array of
> int32 using the C numpy API. I tried using PyArray_CastTo, but this
> gives me an array full of zeros instead of converting the items to int.
> I am doing something like the following to convert a PyArrayObject in_o
> of double:
>
> ndescr = PyArray_DescrNewFromType(NPY_INT32);
>
> /* should be equivalent to astype */
> ar = (PyArrayObject*)PyArray_FromArray((PyArrayObject*)in_o,
> ndescr, NPY_FORCECAST);
> if (ar == NULL) {
> goto clean_ndescr;
> }
> /* Using C Api for casting */
> dims = PyArray_DIMS(in_o);
> Py_INCREF(ndescr);
> casted = (PyArrayObject*)PyArray_Zeros(((PyArrayObject*)in_o)->nd,
> dims, ndescr, 0);
> if (casted == NULL) {
> goto clean_ar;
> }
> st = PyArray_CastTo((PyArrayObject*)in_o, casted);
> if (st) {
> goto clean_casted;
> }
Just forget about it, I didn't notice that PyArray_CastTo takes its
input as the 2d argument...
Sorry for the noise,
David
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