getting the hierarchy tree

Hi again,
How is it possible to return the hierarchy tree from a NestedBlockModel? I've found that the gt.get_hierarchy_tree returns the tree as graph, but I couldn't understand how to map partition names at each level n to the ones at level n+1. Actually I'm doing this iteratively running state.project_partition() and using crosstabs to do the matches, but I wonder if there's a smarter way to proceed.

As the documentation of get_hierarchy_tree() states, it returns a vertex
property map that maps the nodes of the tree to the group labels of
every level.


Now I see... thanks