diff --git a/tools/cal_pos_neg.py b/tools/cal_pos_neg.py
index 831a5d80d4f34d229fb73f784eeba16330f6bbe1..3f349aef2022181bace5dade79c898937be4783b 100644
--- a/tools/cal_pos_neg.py
+++ b/tools/cal_pos_neg.py
@@ -1,5 +1,5 @@
 # Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
-#   
+#
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
@@ -11,7 +11,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 #!/usr/bin/python  
 #-*- coding:utf-8 -*-  
 ############################