谷歌appengine中的Html 301重定向

I am hosting a websiete on google appengine with python. I have seperate pages, in directories, and I need to know how to redirect from eg.:"www.example.com/page". whtn I dont add another "/" after page, it comes up with "404 not found". How do I change my redirect script to add this? here's my app.yaml:I am hosting a websiete on google appengine wit