Add #!/usr/bin/python line to csv_uploader.
diff --git a/csv_uploader.py b/csv_uploader.py
index d901428..0d76d52 100755
--- a/csv_uploader.py
+++ b/csv_uploader.py
@@ -1,3 +1,4 @@
+#!/usr/bin/python
 # Copyright 2015 Google Inc. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");