Fixes communuty for nodes with no community

pydtn/community.py

@@ -129,7 +129,7 @@ class Community:
         If the node has no community it is it's own all alone.
         """
         if node not in self._community:
-            self._community[node] = frozenset(list(node))
+            self._community[node] = frozenset(list([node]))
         return self._community[node]
 
     def local_popularity(self, node):