Function PyArray_View

numpy/core/src/multiarray/convert.c:503–543

NUMPY_API * View * steals a reference to type -- accepts NULL */

 * steals a reference to type -- accepts NULL
 */
NPY_NO_EXPORT PyObject *
PyArray_View(PyArrayObject *self, PyArray_Descr *type, PyTypeObject *pytype)
{
    PyArrayObject *ret = NULL;
    PyArray_Descr *dtype;
    PyTypeObject *subtype;
    int flags;

    if (pytype) {
        subtype = pytype;
    }
    else {
        subtype = Py_TYPE(self);
    }

    dtype = PyArray_DESCR(self);
    flags = PyArray_FLAGS(self);

    Py_INCREF(dtype);
    ret = (PyArrayObject *)PyArray_NewFromDescr_int(
            subtype, dtype,
            PyArray_NDIM(self), PyArray_DIMS(self), PyArray_STRIDES(self),
            PyArray_DATA(self),
            flags, (PyObject *)self, (PyObject *)self,
            _NPY_ARRAY_ENSURE_DTYPE_IDENTITY);
    if (ret == NULL) {
        Py_XDECREF(type);
        return NULL;
    }

    if (type != NULL) {
        if (PyObject_SetAttrString((PyObject *)ret, "dtype",
                                   (PyObject *)type) < 0) {
            Py_DECREF(ret);
            Py_DECREF(type);
            return NULL;
        }
        Py_DECREF(type);
    }
    return (PyObject *)ret;
}