YAK 4000

// The current tstate must be the original tstate when we call PyEval_ThreadsInitialized
PyThreadState_Swap(m_pThreadState);

/* If the plug-in has enabled threads (by using any sort of threading),
 * we must kill the threads before destroying the interpreter */
if (PyEval_ThreadsInitialized())
{
    // Loop through all threads in the current interpreter and raise SystemExit
    PyThreadState *curstate = m_pInterpState->tstate_head;
    while (curstate != NULL && curstate->interp == m_pInterpState)
    {
        PyThreadState_Swap(curstate);

        PyThreadState_SetAsyncExc(curstate->thread_id, _PyExc_SystemExit);
        curstate = curstate->next;

        PyThreadState_Swap(NULL);
    }

    /* This is very much frowned upon in Py_EndInterpreter, but this little
     * hack makes Python happy. I don't know the consequences of this line,
     * but until I do, I won't feel guilty >_> */
    m_pInterpState->tstate_head = m_pThreadState;
}

PyThreadState_Swap(m_pThreadState);
Py_EndInterpreter(m_pThreadState);