Python 3.9 is now generally available.

Module: google.appengine.ext


blobstore module: Blobstore API module.

db module: Simple, schema-based database abstraction layer for the datastore.

deferred module

gql module: GQL -- the SQL-like interface to the datastore.

key_range module: Key range representation and splitting.

ndb module: NDB -- A new datastore API for the Google App Engine Python runtime.

remote_api module

testbed module: A module to use service stubs for testing.