Hey,<div><br></div><div>Is there a way to receive a callback or notification when new topics appear?</div><div><br></div><div>I see that rospy has this function: <a href="http://www.ros.org/doc/api/rospy/html/rospy.client-module.html#get_published_topics">http://www.ros.org/doc/api/rospy/html/rospy.client-module.html#get_published_topics</a></div>

<div><br></div><div>However, I&#39;d prefer not to be polling it. For the moment, I&#39;ve configured my system with a shared &quot;announce&quot; channel where new hardware can make existing hardware aware of itself and what its topics are. However, it would be great if it were possible to simply subscribe to a topic of new topics, and do it that way.</div>

<div><br></div><div>Thanks for any input,</div><div><br></div><div>Mike</div><meta http-equiv="content-type" content="text/html; charset=utf-8">