Function initialize

src/utils/python.cpp:44–70

} // namespace

void initialize()
{

  // Thread-safe initialization with double-checked locking pattern
  if (!is_active()) {
    static std::mutex m;
    std::lock_guard<std::mutex> lock(m);
    if (!is_active()) {

      // Hack to display output from Python
      // Note: Python outputs didn't appear because MPI intercepts
      // stdout and stderr. See
      // https://stackoverflow.com/questions/29352485/python-print-not-working-when-embedded-into-mpi-program
      Py_UnbufferedStdioFlag = 1;

      // Initialize Python session and release GIL
      Py_Initialize();
#if !(PY_MAJOR_VERSION >= 3 && PY_MINOR_VERSION >= 7)
      PyEval_InitThreads();
#endif
      init_thread_state = PyEval_SaveThread();
      if (!is_active()) {
        LBANN_ERROR("error initializing embedded Python session");
      }
    }
  }
}

void finalize()
{