diff --git a/python/examples/imagenet/image_classification_service_gpu.py b/python/examples/imagenet/image_classification_service_gpu.py
index 51f79179e02d78cf56a235c01f768d11a19f60b4..8fc92d918867142c6c442cb9eba61e2a9fb1f0e5 100644
--- a/python/examples/imagenet/image_classification_service_gpu.py
+++ b/python/examples/imagenet/image_classification_service_gpu.py
@@ -18,7 +18,12 @@ import os
 import base64
 from image_reader import ImageReader
 
+
 class ImageService(WebService):
+    """
+    preprocessing function for image classification
+    """
+
     def preprocess(self, feed={}, fetch=[]):
         reader = ImageReader()
         if "image" not in feed:
diff --git a/python/examples/imagenet/image_http_client.py b/python/examples/imagenet/image_http_client.py
index bcb391f82a57742be526c8c4dd1de1e1729d0a4d..74cafaa850aa02122127ce2457af07f853e1ac94 100644
--- a/python/examples/imagenet/image_http_client.py
+++ b/python/examples/imagenet/image_http_client.py
@@ -17,12 +17,12 @@ import base64
 import json
 import time
 
+
 def predict(image_path, server):
     image = base64.b64encode(open(image_path).read())
     req = json.dumps({"image": image, "fetch": ["score"]})
     r = requests.post(
         server, data=req, headers={"Content-Type": "application/json"})
-    #print(r.json()["score"])
 
 
 if __name__ == "__main__":