message: when python is not initialized , do nothing in python hooks.
diff: @@ -46,7 +46,7 @@ PythonHooks* PythonHooks::GetSingleton() {
  }
  void PythonHooks::Start(const PythonHooksOptions& option) {
  - DCHECK(Py_IsInitialized());
  + if (!Py_IsInitialized()) return;
  if (option.enable_python_traceme || option.enable_trace_python_function) {
  PyGILState_STATE gil_state = PyGILState_Ensure();
  if (option.enable_trace_python_function) {
  