Am 15.06.20 um 16:45 schrieb James Ruffle: > Tiago, > > I’m sorry that you feel that my code to use the graph_union with > intersection, following which to remove parallel edges, then call > Graph.copy_property on the union graph, did not follow your instructions > which, as far as I can read, specifically asked I use all of those and in > that order.
I didn't "feel" it, you had not called copy_property in your example, you had just alluded that it "didn't work". >> # To take the union of all edges between two graphs, you can use the >> graph_union(g1, g2) function, while passing the 'intersection’ parameter >> with the Graph.vertex_index property map of g2 (to avoid the nodes being >> duplicated). This will create parallel edges for those that appear in both >> graphs, which you can remove with remove_parallel_edges(). You can then copy >> any edge property map from either g1 or g2 by calling Graph.copy_property() >> on the union graph. > > > A complete and minimal example with just vertex labels is the following: It had a syntax error, and some missing parts, but I managed to get it working. > #run copy property on the union graph, where src is the source property, > namely the original label file > ug.copy_property(src=g.vp.label) > ####This is the error I want to fix in this example, and transfer the label > property from the original lesmis graph object to the union graph The documentation of "copy_property" says: "The optional parameter ``g`` specifies the source graph to copy properties from (defaults to self)." Since this not owned by the same graph you need to do: ug.copy_property(src=g.vp.label, g=g) (I will actually change this, so that the default becomes the graph that owns the property, which is less error prone). -- Tiago de Paula Peixoto <ti...@skewed.de> _______________________________________________ graph-tool mailing list graph-tool@skewed.de https://lists.skewed.de/mailman/listinfo/graph-tool
