Function vtkPythonPreConfig

Utilities/PythonInterpreter/vtkPythonInterpreter.cxx:241–269

------------------------------------------------------------------------------ Ensure that Python is pre-initialized enough for VTK to do its initialization. Must be called before any `PyMem_*` calls are made.

// Ensure that Python is pre-initialized enough for VTK to do its
// initialization. Must be called before any `PyMem_*` calls are made.
static bool vtkPythonPreConfig()
{
  // Guard against doing this multiple times.
  static bool done = false;
  if (done)
  {
    return false;
  }
  done = true;

#if PY_VERSION_HEX >= 0x03080000
  PyStatus status;
  PyPreConfig preconfig;
  PyPreConfig_InitPythonConfig(&preconfig);

  preconfig.allocator = PYMEM_ALLOCATOR_NOT_SET;
  preconfig.utf8_mode = 1;

  status = Py_PreInitialize(&preconfig);
  if (PyStatus_Exception(status))
  {
    Py_ExitStatusException(status);
  }

  return preconfig.isolated;
#else
  return Py_FrozenFlag;
#endif
}

//------------------------------------------------------------------------------
namespace