diff --git a/python/paddle/trainer/PyDataProvider2.py b/python/paddle/trainer/PyDataProvider2.py
index 0f0b0a1175336f202e8ac5a6ed1c35aff250a6e2..de266bb5d3d07e844bb144690a0f22514454182d 100644
--- a/python/paddle/trainer/PyDataProvider2.py
+++ b/python/paddle/trainer/PyDataProvider2.py
@@ -106,6 +106,7 @@ def integer_value_sequence(dim):
 def integer_value_sub_sequence(dim):
     return integer_value(dim, seq_type=SequenceType.SUB_SEQUENCE)
 
+
 integer_sequence = integer_value_sequence