Function PyArray_FailUnlessWriteable

numpy/core/src/multiarray/arrayobject.c:636–647

NUMPY_API * * This function does nothing and returns 0 if *obj* is writeable. * It raises an exception and returns -1 if *obj* is not writeable. * It may also do other house-keeping, such as issuing warnings on * arrays which are transitioning to become views. Always call this * function at some point before writing to an array. * * *name* is a name for the array, used to give better

 *  or even just "array".
 */
NPY_NO_EXPORT int
PyArray_FailUnlessWriteable(PyArrayObject *obj, const char *name)
{
    if (!PyArray_ISWRITEABLE(obj)) {
        PyErr_Format(PyExc_ValueError, "%s is read-only", name);
        return -1;
    }
    if (array_might_be_written(obj) < 0) {
        return -1;
    }
    return 0;
}


/* From umath/string_ufuncs.cpp/h */