Fix edge count bug in condensation_graph()

src/graph/community/graph_community_network.hh

@@ -92,8 +92,9 @@ struct get_community_network
                         ce = comm_edges[make_pair(ct, cs)];
                     else
                     {
-                        ce = add_edge(cs,ct,cg).first;
+                        ce = add_edge(cs, ct, cg).first;
                         comm_edges[make_pair(cs, ct)] = ce;
+                        cedge_index[ce] = comm_edges.size() - 1;
                     }
                     edge_count[ce] += get(weight, *e);
                 }

src/graph_tool/community/__init__.py

@@ -341,7 +341,7 @@ def condensation_graph(g, prop, weight=None):
     libgraph_tool_community.community_network(g._Graph__graph,
                                               gp._Graph__graph,
                                               _prop("v", g, prop),
-                                              _prop("v", g, vcount),
-                                              _prop("e", g, ecount),
+                                              _prop("v", gp, vcount),
+                                              _prop("e", gp, ecount),
                                               _prop("e", g, weight))
     return gp, vcount, ecount