code: def store_result(self, task_id, result, status,
                       traceback=None, children=None):
          
          return self.update_or_create(task_id=task_id,
                                       defaults={'status': status,
                                                 'result': result,
                                                 'traceback': traceback,
                                                 'meta': {'children': children}})
docs: Store the result and status of a task.
  
          :param task_id: task id
  
          :param result: The return value of the task, or an exception
              instance raised by the task.
  
          :param status: Task status. See
              :meth:`celery.result.AsyncResult.get_status` for a list of
              possible status values.
  
          :keyword traceback: The traceback at the point of exception (if the
              task failed).
  
          :keyword children: List of serialized results of subtasks
              of this task.
  
          :keyword exception_retry_count: How many times to retry by
              transaction rollback on exception. This could theoretically
              happen in a race condition if another worker is trying to
              create the same task. The default is to retry twice.