diff --git a/mindinsight/conf/constants.py b/mindinsight/conf/constants.py
index 273da166dd9e06a7f24d848000d60bfcb23e8763..9a4eadbc68103e8f184f4b8810c03199eef52d17 100644
--- a/mindinsight/conf/constants.py
+++ b/mindinsight/conf/constants.py
@@ -6,6 +6,7 @@
 #
 # http://www.apache.org/licenses/LICENSE-2.0
 #
+#
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.