I would like to be able to construct two sets of objects, and use the Sage Notebook display a list of the objects in each set (representing them with the __repr__ special method).
Let d = dict().
Then I would like to click on an object in one of the sets (say object a, click on an object in the other set, b), and those two clicks and a button click signifies d[a] = b.
I guess I am asking for a user-friendly way to do this.
