title: Point and line tooltips in matplotlib?
body: <p>I have a graph with some line segments (<a href="http://matplotlib.sourceforge.net/api/collections_api.html#matplotlib.collections.LineCollection" rel="noreferrer">LineCollection</a>) and some points. These lines and points have some values associated with them that are not graphed. I would like to be able to add a mouse-over tool-tip or other method of easily finding the associated value for the points and line. Is this possible for either points or lines segments?   </p>