This is a release of the App Engine services SDK for Python 3. It provides access to various services and API endpoints that were previously only available on the Python 2.7 runtime.

See the documentation to learn more about using this SDK, and learn more about it in this product announcement (Fall 2021).

Additional examples (Datastore [NDB], Task Queues [push tasks], Memcache) can be found in the App Engine migration repo. (Specifically look for samples whose folders have a b but where the Python 2 equivalent folder does not have an a, meaning this SDK is required, e.g., Modules 1 [mod1 and mod1b], 7, 12, etc.)

In your requirements.txt file, add the following:

appengine-python-standard>=1.0.0

To use a pre-release version (Eg. 1.0.1-rc1), modify the above line to appengine-python-standard>=[insert_version] (Eg. appengine-python-standard>=1.0.1-rc1).

In your app's app.yaml, add the following:

app_engine_apis: true

In your main.py, import google.appengine.api.wrap_wsgi_app() and call it on your WSGI app object.

Example for a standard WSGI app:

import google.appengine.api

def app(environ, start_response):
    start_response('200 OK', [('Content-Type', 'text/plain')])
    yield b'Hello world!\n'

app = google.appengine.api.wrap_wsgi_app(app)

Example for a Flask app:

import google.appengine.api
from flask import Flask, request

app = Flask(__name__)
app.wsgi_app = google.appengine.api.wrap_wsgi_app(app.wsgi_app)

Then deploy your app as usual, with gcloud app deploy. The following modules are available:

• google.appengine.api.app_identity
• google.appengine.api.background_thread
• google.appengine.api.blobstore
• google.appengine.api.capabilities
• google.appengine.api.croninfo
• google.appengine.api.dispatchinfo
• google.appengine.api.images
• google.appengine.api.mail
• google.appengine.api.memcache
• google.appengine.api.modules
• google.appengine.api.oauth
• google.appengine.api.runtime
• google.appengine.api.search
• google.appengine.api.taskqueue
• google.appengine.api.urlfetch
• google.appengine.api.users
• google.appengine.ext.blobstore
• google.appengine.ext.db
• google.appengine.ext.gql
• google.appengine.ext.key_range
• google.appengine.ext.ndb
• google.appengine.ext.testbed

To install the code from the main branch on GitHub rather than the latest version published to PyPI, put this in your requirements.txt file instead of appengine-python-standard:

https://github.com/GoogleCloudPlatform/appengine-python-standard/archive/main.tar.gz