I have had this workaround in _hashopenssl.c for a while. Can I get rid of the function with "{Py_tp_new, NULL}" or is there a more generic way to accomplish the same goal?

/* {Py_tp_new, NULL} doesn't block __new__ */
static PyObject *
_disabled_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)
{
    PyErr_Format(PyExc_TypeError,
        "cannot create '%.100s' instances", _PyType_Name(type));
    return NULL;
}