add local recordio reader interface

python/paddle/v2/reader/creator.py

@@ -16,7 +16,7 @@ Creator package contains some simple reader creator, which could be used in user
 program.
 """
 
-__all__ = ['np_array', 'text_file']
+__all__ = ['np_array', 'text_file', "RecordIO"]
 
 
 def np_array(x):
@@ -55,3 +55,22 @@ def text_file(path):
         f.close()
 
     return reader
+
+
+def RecordIO(path):
+    """
+    Creates a data reader that outputs record one one by one from given recordio file
+    :path: path of recordio file
+    :returns: data reader of recordio file
+    """
+
+    def reader():
+        f = recordio.reader(path)
+        while True:
+            r = f.read()
+            if r is None:
+                break
+            yield r
+        f.close()
+
+    return reader

python/paddle/v2/reader/tests/creator_test.py

@@ -36,5 +36,14 @@ class TestTextFile(unittest.TestCase):
             self.assertEqual(e, str(idx * 2) + " " + str(idx * 2 + 1))
 
 
+class TestRecordIO(unittest.TestCase):
+    def test_RecordIO(self):
+        path = os.path.join(
+            os.path.dirname(__file__), "test_recordio_creator.dat")
+        reader = paddle.v2.reader.creator.RecordIO(path)
+        for idx, r in enumerate(reader()):
+            self.assertSequenceEqual(r, str(idx))
+
+
 if __name__ == '__main__':
     unittest.main()