⬆️ bipartite conversion fix

cdlib/utils.py

@@ -98,12 +98,16 @@ def __from_nx_to_igraph(g: object, directed: bool = None) -> ig.Graph:
     gi = ig.Graph(directed=directed)
 
     a_r = {}
+    skip_bipartite = False
     if bipartite.is_bipartite(g):
-        A, B = bipartite.sets(g)
-        for a in A:
-            a_r[a] = 0
-        for b in B:
-            a_r[b] = 1
+        try:
+            A, B = bipartite.sets(g)
+            for a in A:
+                a_r[a] = 0
+            for b in B:
+                a_r[b] = 1
+        except nx.exception.AmbiguousSolution:
+            skip_bipartite = True
 
     ## Two problems to handle:
     # 1)in igraph, names have to be str.
@@ -127,7 +131,7 @@ def __from_nx_to_igraph(g: object, directed: bool = None) -> ig.Graph:
             gi.add_vertices(["\\" + str(n) for n in g.nodes()])
             gi.add_edges([("\\" + str(u), "\\" + str(v)) for (u, v) in g.edges()])
 
-    if bipartite.is_bipartite(g):
+    if bipartite.is_bipartite(g) and not skip_bipartite:
         gi.vs["type"] = [
             a_r[name] if type(name) == int else a_r[int(name.replace("\\", ""))]
             for name in gi.vs["name"]