ros/geometry_tutorials — pull request #12 by T045T (2014-10-05 20:09:36+00:00)
Title: update turtle_tf_listener.py

lookup latest known tf and catch ExtrapolationException. This matches the code on [the wiki page](http://wiki.ros.org/tf/Tutorials/Writing%20a%20tf%20listener%20%28Python%29) and ensures it starts up properly every time.