Code for Spanning Trees in a Sage Cell

It's been over a year since I've posted to this blog, mostly because I've been busy being department chair.  As I type this, I've got 213 days left on my term.  So the end is almost in sight.  I posted a page with code for computing the spanning trees of a graph a while ago on http://faculty.uml.edu/klevasseur/ads2/sage_cell/sage_cell.html but I'm not sure how much use it's had. Here is a video that shows how to use this resource:

Your browser does not support the video tag.

A comment from who finds this resource useful will make it more likely that I will find the time to add more!