PyEval_InitThreads in Python 3: How/when to call it? (the saga continues ad nauseam)

Question

Basically there seems to be massive confusion/ambiguity over when exactly PyEval_InitThreads() is supposed to be called, and what accompanying API

Answer 1

I feel confuse on this issue too. The following code works by coincidence.

Py_InitializeEx(0);
    if (!PyEval_ThreadsInitialized()) {
    PyEval_InitThreads();
    PyThreadState* mainPyThread = PyEval_SaveThread();
}

My main thread do some python runtime initial work, and create other pthread to handle tasks. And I have a better workaround for this. In the Main thread:

if (!PyEval_ThreadsInitialized()){
    PyEval_InitThreads();
}
//other codes
while(alive) {
    Py_BEGIN_ALLOW_THREADS
    sleep or other block code
    Py_END_ALLOW_THREADS
}