Re: [Numpy-discussion] Determine if numpy is installed from an extension

Feb. 3, 2010

      On Wed, Feb 3, 2010 at 5:38 PM, Peter Notebaert <peno@telenet.be> wrote:
...
...
From an extension? How to import numpy from there and then test if that
succeeded and that without any annoying message if possible...
One obvious solution would be to simply call PyImport_Import, something like:

#include <Python.h>

PyMODINIT_FUNC initfoo(void)
{
        PyObject *m, *mod;

        m = Py_InitModule("foo", NULL);
        if (m == NULL) {
                return;
        }

        mod = PyImport_ImportModule("numpy");
        if (mod == NULL) {
                return;
        }
        Py_DECREF(mod);
}

But I am not sure whether it would cause some issues if you do this
and then import the numpy C API (which is mandatory before using any C
functions from numpy). I know the python import system has some dark
areas, I don't know if that's one of them or not.

cheers,

David

Re: [Numpy-discussion] Determine if numpy is installed from an extension

David Cournapeau