[Tutor] binding a callback to an event on a Canvas Oval

[Catriona Johnston]

Help!
I have written an application which draws a simple 2D graph drawn on a
canvas widget by create_line and create_oval...the ovals are the points of
the graph. I need to associate a callback to an event of a double click of
the mouse button when over any of the points on the graph. How do I use the
.bind() method on the oval widget extensions of the canvas class?
Thanks
KT