Hi all, I'm thrilled about using Graph-tool to do topic modeling (using Martin Gerlach's code: https://github.com/martingerlach/hSBM_Topicmodel). In order for this technique to really work well, I need some help here - to be able to browse the graph (nested block model) using an interactive window and identify the blocks with a mouse click (each block in this method is a group of words, ie. a topic in this usecase). As you'll see from my uploaded image, when I select a block on the interactive graph, I'm not sure how to determine which block this is referring to. I've written a callback method (win.graph.connect("button_press_event", update_bfs), that is able to extract /widget.picked/. However, I'm not sure what this refers to. Is this an edge id? I'd like a mouseclick on a block to then programmatically trigger searching the hierarchy to print the block in the model (offscreen). <http://main-discussion-list-for-the-graph-tool-project.982480.n3.nabble.com/file/t496184/nestedSBM.jpg> Thanks, -Tim -- Sent from: http://main-discussion-list-for-the-graph-tool-project.982480.n3.nabble.com/