fixed an error if s=e

network_extensions/igraphx/__init__.py

@@ -780,7 +780,7 @@ def projectBipartiteProcess2(data):
                 try:
                     s_n = ng.vs.find(name=og.vs[s]["name"])
                     # s_n = new_nodes[og.vs[s]["name"]]
-                except KeyError:
+                except ValueError:
                     ng.add_vertex(**og.vs[s].attributes())
                     s_n = ng.vs.find(name=og.vs[s]["name"])
                     # new_nodes[og.vs[s]["name"]] = og.vs[s].attributes()