I made this a while ago, wanting something at the same level of abstraction as ndb[0] for Cloud Datastore[1], but running on Python 3. It's recently seen some renewed interest so I figure'd I share it. I realize this is quite niche, but hopefully it'll be relevant to someone. :)
[0]: https://cloud.google.com/appengine/docs/standard/python/ndb/
[1]: https://cloud.google.com/datastore/