modify doc

python/paddle/v2/dataset/sentiment.py

@@ -102,7 +102,7 @@ def load_sentiment_data():
 
 def reader_creator(data):
     """
-    Reader creator, it format data set to numpy
+    Reader creator, generate an iterator for data set
     :param data:
         train data set or test data set
     """

python/paddle/v2/dataset/tests/test_sentiment.py

+# /usr/bin/env python
+# -*- coding:utf-8 -*-
+
 # Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserved
 #
 # Licensed under the Apache License, Version 2.0 (the "License");