def get_task(self, task_id):
        try:
            return self.get(task_id=task_id)
        except self.model.DoesNotExist:
            if self._last_id == task_id:
                self.warn_if_repeatable_read()
            self._last_id = task_id
            return self.model(task_id=task_id)
Prepare the I/O handlers.
dataset/ETHPy150Open celery/django-celery/djcelery/managers.py/TaskManager.get_task--crossover with--dataset/ETHPy150Open kuri65536/python-for-android/python3-alpha/python-libs/pyxmpp2/mainloop/select.py/SelectMainLoop._prepare_handlers