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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_notification(self, notification_id):
 """ returns a specific notification by given id :param str notification_id: the ID of the notification """

        log.debug("getting notification '{}'...".format(notification_id))
        cmd, url = DEVICE_URLS["get_notification"]
        return self._exec(cmd, url.replace(":id", notification_id))