fix lint

.travis.yml

@@ -65,6 +65,11 @@ script:
 - cd $TRAVIS_BUILD_DIR  # go back to root so that deploy may work
 
 notifications:
+  email:
+    recipients:
+      - ppwwyyxxc@gmail.com
+    on_success: never
+    on_failure: always
   webhooks:
     urls:
       - https://webhooks.gitter.im/e/cede9dbbf6630b3704b3

tensorpack/input_source/input_source.py

@@ -21,7 +21,6 @@ from ..tfutils.tower import get_current_tower_context
 from ..tfutils.dependency import dependency_of_fetches
 from ..utils import logger
 from ..utils.concurrency import ShareSessionThread
-from ..utils.develop import deprecated
 from ..callbacks.base import Callback, CallbackFactory
 from ..callbacks.graph import RunOp