static void CopyInto(py::array dst, py::array src) {
if (0 != PyArray_SIZE((PyArrayObject *) dst.ptr()) && 0 != PyArray_SIZE((PyArrayObject *) src.ptr())) {
int ret = PyArray_CopyInto((PyArrayObject *) dst.ptr(), (PyArrayObject *) src.ptr());
if (-1 == ret) { throw py::error_already_set(); }
}
}
static int NDIM (py::array arr) { return PyArray_NDIM ((PyArrayObject *) arr.ptr()); }