def update_keys(self):
        """
        Update the redis keys to listen for new jobs priorities.
        """
        self.keys = self.queue_model.get_waiting_keys(self.queues)

        if not self.keys:
            self.log('No queues yet', level='warning')
        self.last_update_keys = datetime.utcnow()
Update the redis keys to listen for new jobs priorities.