Pyomo / pyomo

An object-oriented algebraic modeling language in Python for structured optimization problems.

cherrypy / cherrypy

CherryPy is a pythonic, object-oriented HTTP framework. https://cherrypy.dev

django-commons / django-polymorphic

Improved Django model inheritance with automatic downcasting

jaraco / path

Object-oriented file system path manipulation

zopefoundation / ZODB

Python object-oriented database