For everyone who watches: you can download it here !!
This is a find. Honestly, dev_appserver.py is easy to use (just run dev_appserver.py . In your top level directory of the application, then go to localhost: 8080)
For deployment, it was a mess: you need appcfg.py, which I could not find anywhere. I tried installing things from gcloud, but their installation script did not work for me. And then I found an old application. Work great!
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