diff --git a/python/paddle_serving_app/utils/arr2image.py b/python/paddle_serving_app/utils/arr2image.py
index bbaad99497d68b1f60bc675a638b98b0116573e0..295ed5cc784b3c3403f3fb0edb029314d09659e0 100644
--- a/python/paddle_serving_app/utils/arr2image.py
+++ b/python/paddle_serving_app/utils/arr2image.py
@@ -11,10 +11,12 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+# pylint: disable=doc-string-missing
 
 import cv2
 import yaml
 
+
 class Arr2Image(object):
     """
     from numpy array image(jpeg) to cv::Mat image
@@ -28,4 +30,4 @@ class Arr2Image(object):
         return img
 
     def __repr__(self):
-        return self.__class__.__name__ + "()"
\ No newline at end of file
+        return self.__class__.__name__ + "()"
diff --git a/python/util.py b/python/util.py
index 32dc2993077d1a73b880620549d924b54c1c3bf8..ef7cd6632855266096decc3139ca72a46ead6d2b 100644
--- a/python/util.py
+++ b/python/util.py
@@ -11,6 +11,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+# pylint: disable=doc-string-missing
 
 from pkg_resources import DistributionNotFound, get_distribution
 from grpc_tools import protoc