Numpy C-API bits

gistfile1.c

/* ensure array is contiguous, aligned and correct data type */
array = PyArray_FROM_OTF(input_array, NPY_FLOAT32, NPY_CARRAY_RO);

/* reshape the input array to the correct dimensions */
PyArray_Dims dims;
npy_intp shape[2] = {-1, attr.count};
dims.len = 2;
dims.ptr = shape;
array = PyArray_Newshape((PyArrayObject *)array, &dims, NPY_CORDER);