diff --git a/python/paddle/v2/data_feeder.py b/python/paddle/v2/data_feeder.py
index 74ee112f46efd78ff0ffcf95bad2580cc582fd29..632f1760ab5ff244f6d8d300d185b388d6643368 100644
--- a/python/paddle/v2/data_feeder.py
+++ b/python/paddle/v2/data_feeder.py
@@ -62,8 +62,8 @@ class DataFeeder(DataProviderConverter):
         self.reader_dict = reader_dict
         for each in data_types:
             self.input_names.append(each[0])
-            self.input_types.append(each[1])
             assert isinstance(each[1], data_type.InputType)
+            self.input_types.append(each[1])
         DataProviderConverter.__init__(self, self.input_types)
 
     def convert(self, dat, argument=None):
@@ -88,24 +88,16 @@ class DataFeeder(DataProviderConverter):
         :type argument: swig_paddle.Arguments
         """
 
-        if argument is None:
-            argument = swig_paddle.Arguments.createArguments(0)
-        assert isinstance(argument, swig_paddle.Arguments)
-        argument.resize(len(self.input_types))
-
-        scanners = [
-            DataProviderConverter.create_scanner(i, each_type)
-            for i, each_type in enumerate(self.input_types)
-        ]
-
-        for each_sample in dat:
-            for name, scanner in zip(self.input_names, scanners):
-                scanner.scan(each_sample[self.reader_dict[name]])
-
-        for scanner in scanners:
-            scanner.finish_scan(argument)
+        def reorder_data(data):
+            retv = []
+            for each in data:
+                reorder = []
+                for name in self.input_names:
+                    reorder.append(each[self.reader_dict[name]])
+                retv.append(reorder)
+            return retv
 
-        return argument
+        return DataProviderConverter.convert(self, reorder_data(dat), argument)
 
     def __call__(self, dat, argument=None):
         return self.convert(dat, argument)