App Engine Documentation Python Standard Environment Python 2.5 Support for Python 2.5 has been removed from App Engine. You must migrate to Python 2.7. Deprecation and decommissioning history The deprecation of Python 2.5 support was announced on March 8, 2013 and support was permanently shut down on June 20, 2017. Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 3.0 License, and code samples are licensed under the Apache 2.0 License. For details, see our Site Policies. Java is a registered trademark of Oracle and/or its affiliates. Last updated November 16, 2017.