In a jupyter notebook cell running Sage 9.8 I see the following:
where P has type <class 'sage.graphs.graph.Graph'>. Two issues:
(1) I thought that deprecation warnings were only supposed to be displayed once? I know that I am using two different methods (vertices and edges) but even if I re-evaluate "P.vertices(), P.edges()' I get the two warnings.
(2) There's a link to a nonexistent page
http://trac.sagemath.org/22349. Perhaps Sage 10 will do the right thing here, but this would be off-putting to a nonexpert user.
John