Pylons Project is an open-source organization that develops a set of web application technologies written in Python.

Pyramid is an open source web framework written in Python and is based on WSGI.

It makes extensive use of the Web Server Gateway Interface standard to promote reusability and to separate functionality into distinct modules.

Using the common INI configuration format, Paste allows for multiple "profiles", so that developers can run development and deployment setups from the same codebase without revealing sensitive parts of Pylons, such as the interactive debugger, to production users.

Another piece of Rails adapted for Pylons is WebHelpers, which provides URL mapping based on the Routes configuration.

WebHelpers also provides some utility functions for generating JavaScript code making use of the script.aculo.us and Prototype libraries.

[13] Both templating languages are text-based (as opposed to XML-based), and support includes, inheritance and embedding arbitrary Python code.