Export data from Google App Engine to csv
Question: This [old answer](http://stackoverflow.com/questions/2810394/export-import-
datastore-from-to-google-app-engine) points to a link on [Google App Engine
documentation](http://code.google.com/appengine/docs/python/tools/uploadingdata.html),
but that link is now about backup your GAE data, not downloading it.

So how to download all the data into a csv? The data is small, i.e < 1 GB


Answer: You can use `appcfg.py` to download `Kind` data in csv format.

> $ appcfg.py download_data --help
>
> Usage: appcfg.py [options] download_data
>
> Download entities from datastore.
>
> The 'download_data' command downloads datastore entities and writes them to
> file as CSV or developer defined format.

