I like to work with data saved in one GAE application in other GAE applications. Basically share the datastore between multiple web applications in Google App Engine (Pytho
I guess the core problem here is that you would like to share the data between two applications hosted on GAE. There are two ways to do that.
You could use Google Cloud Datastore to store the information. This gives you more flexibility as you can have different services accessing datastore. You could even have something running on google compute engine and communicating with datastore.
Use google appengine modules. All modules share the same datastore. In your case each module could be a different application.
Hope this helps.