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Note: This framework is available to Python 2.7 users only.
A web application framework can simplify development by taking care of the details of the interface, letting you focus development effort on your application's features. App Engine includes a simple web application framework called webapp2 - a lightweight framework that allows you quickly build simple web applications for the Python 2.7 runtime.
webapp2 is compatible with the WSGI standard for Python web applications. You don't have to use webapp2 to write Python applications for App Engine. Other web application frameworks, such as Django, work with App Engine, and App Engine supports any Python code that uses the CGI standard. The webapp2 project, by Rodrigo Moraes, started as a fork of the App Engine webapp framework, which was used by the Python 2.5 runtime. webapp2 includes a number of features that make developing web applications easier, such as improved support for URI routing, session management and localization. The Python 2.7 runtime uses webapp2, and the project is maintained externally to App Engine. It is supported, but not maintained, by Google.
For more information about webapp2, see the official documentation.
Using the webapp2 framework in Python 2.7Python 2.7 applications can use either WSGI or CGI to handle requests, but WSGI is generally recommended.
Blobstore and Mail HandlersSince it is an external library, webapp2 does not provide any App Engine-specific services. Python 2.7 apps must use the webapp versions of BlobstoreUploadHandler and BlobstoreDownloadHandler. See webapp Blobstore Handlers for details.
Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2025-07-09 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-07-09 UTC."],[[["webapp2 is a lightweight web application framework for Python 2.7, simplifying development by handling interface details and allowing developers to focus on application features."],["webapp2 is compatible with the WSGI standard but not exclusive; other frameworks like Django are also supported, and any Python code using CGI works with App Engine."],["Originally forked from the App Engine webapp framework used by the Python 2.5 runtime, webapp2 includes improved features such as better URI routing, session management, and localization."],["Although webapp2 is an external library and is supported but not maintained by Google, it does not provide any App Engine-specific services, so Python 2.7 apps must use webapp versions of `BlobstoreUploadHandler` and `BlobstoreDownloadHandler`."]]],[]]
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