diff --git a/algorithm/LPA.py b/algorithm/LPA.py
index b98c4ce..8eb55dc 100644
--- a/algorithm/LPA.py
+++ b/algorithm/LPA.py
@@ -28,6 +28,11 @@ def get_max_neighbor_label(self,node_index):
         for neighbor_index in self._G.neighbors(node_index):
             neighbor_label = self._G.node[neighbor_index]["label"]
             m[neighbor_label] += 1
+
+        if(not bool(m)):
+            #return label of the vertex itself if it's an isolated vertex
+            return [self._G.node[node_index]["label"]]
+
         max_v = max(m.itervalues())
         return [item[0] for item in m.items() if item[1] == max_v]
 
@@ -68,4 +73,4 @@ def execute(self):
     algorithm = LPA(G)
     communities = algorithm.execute()
     for community in communities:
-        print community
\ No newline at end of file
+        print community