<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def exists(self):
 """Test if this queue exists in the AMQP store. Note: This doesn't work with redis as declaring queues has not effect except creating the exchange. :returns: True if the queue exists, else False. :rtype: bool """

        try:
            queue = self.queue
            queue.queue_declare(passive=True)
        except NotFound:
            return False
        except ChannelError as e:
            if e.reply_code == '404':
                return False
            raise e
        return True