Issue with PyArray_SimpleNewFromData - unknown location?

Asked Dec 04 '18 at 11:45

Active Dec 04 '18 at 11:45

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I am trying to call some np functionality from cpp. I have created array and I am trying to create pyArray:

const int SIZE_X = 1000;
const int SIZE_Y = 9;
npy_intp dims[2]{SIZE_X, SIZE_Y};
const int ND = 2;
double* c_arr = reinterpret_cast<double*>(calloc(SIZE_X*SIZE_Y,sizeof(double)));
if (!c_arr) {
    std::cout << "Out of memory." << std::endl;
}
for (int i = 0; i < SIZE_X; i++)
  for (int j = 0; j < SIZE_Y; j++)
     c_arr[i*SIZE_Y+j] = something;

//Convert it to a NumPy array.
PyObject *pArray = PyArray_SimpleNewFromData(
    ND, dims, NPY_DOUBLE, reinterpret_cast<void*>(c_arr));

I have also tried to use new. The error I get is:

unknown location:0: fatal error: in "basic": memory access violation at address: 0x00000010: no mapping at fault address

I tried some things like import_array(), but it didn't help. I don't see what I am missing?

asked Dec 04 '18 at 11:45

user3616359

This happens when calling `PyArray_SimpleNewFromData`? – Matthieu Brucher Dec 04 '18 at 11:47
Yes! Removing that line, and everything is fine. I have some other calls that I tested, some numpy functionality , and everything works. – user3616359 Dec 04 '18 at 11:50
We don't have the full code, so no idea what you missed. Check here: https://stackoverflow.com/questions/30357115/pyarray-simplenewfromdata-example – Matthieu Brucher Dec 04 '18 at 11:53
But if you only use this piece of code that I have put, the error is seen. – user3616359 Dec 04 '18 at 12:00
Solved, I wrongly checked with import_array before Py_Initialize(); It should be called after. – user3616359 Dec 04 '18 at 12:53

Issue with PyArray_SimpleNewFromData - unknown location?

0 Answers0