Visualized MacPorts Ports

[Jean-François Caron]

I just read this not-so-useful-but-cool blog post about making a visual representation of the Ubuntu packages using python and a graphing kit:

http://www.tech-foo.net/ubuntu-package-repository-visualisation-take-2.html

I'm wondering if there is a MacPorts equivalent to the python-apt package, for getting MacPorts information directly within python.  Or otherwise a good way to access the MacPorts list of ports, dependencies, and categories from Python.

Jean-François