Get task result from worker. If the task is not finished, return None.
        It's prefered to use :class:`carotte.Task` object directly.

        :param string task_id: Task ID

        :returns: Task dict
        :rtype: dict

def get_task_result(self, task_id):
        """
        Get task result from worker. If the task is not finished, return None.
        It's prefered to use :class:`carotte.Task` object directly.

        :param string task_id: Task ID

        :returns: Task dict
        :rtype: dict
        """
        data = {
            'action': 'get_result',
            'id': task_id
        }
        self.__send_pyobj(data)
        task = self.__recv_pyobj()
        return task