I couldn’t find a local DataStore Data Viewer anywhere. After a lot of searching I found that it’s actually pretty simple.

1. Start up your application
2. Point your browser to: http://localhost:8080/_ah/admin/

I haven’t tried this with the Python version of App Engine, but I know it works on Java.

Updated: It does work with the Python version of App Engine.

Read the whole discussion where I found the solution to this issue.