Turbogears2 is a framework to develop web applications in python, following a model-view-controller architecture.
the main turbogears2 package is python-turbogears2. this package contains the development tools needed to create web applications powered by turbogears2. in particular, this package provide integration with the python paste tools implementing scaffolding command to start developing turbogears2 applications.
if you only need to run (and not developed) web applications powered by turbogears2, it might be enough to install the python-turbogears2 packages.