diff --git a/python/paddle/v2/layer.py b/python/paddle/v2/layer.py
index 0e9e2a249ddb3a8c8929723fe64a6bb4cedf4b63..618a220240c15db64e1e0f9e96eea471e1da5649 100644
--- a/python/paddle/v2/layer.py
+++ b/python/paddle/v2/layer.py
@@ -71,6 +71,7 @@ import collections
 import paddle.trainer_config_helpers as conf_helps
 from paddle.trainer_config_helpers.config_parser_utils import \
     parse_network_config as __parse__
+
 from paddle.trainer_config_helpers.default_decorators import wrap_name_default
 from paddle.trainer_config_helpers.default_decorators import wrap_act_default
 from paddle.trainer_config_helpers.default_decorators import wrap_bias_attr_default
@@ -80,8 +81,6 @@ import data_type
 import activation
 import attr
 
-#import pudb;pudb.set_trace()
-
 __all__ = [
     'parse_network',
     'data',