PyString_InternImmortal(PyObject **p)
{
    PyString_InternInPlace(p);
    if (PyString_CHECK_INTERNED(*p) != SSTATE_INTERNED_IMMORTAL) {
        PyString_CHECK_INTERNED(*p) = SSTATE_INTERNED_IMMORTAL;
        Py_INCREF(*p);
    }
}
Unknown