It's tool that generates python dependency graphs. It's quite new project, but looks very nice. Requires Python 2.5. Will attach a proposed ebuild in a moment...
Created attachment 141904 [details] snakefood-1.3.ebuild
+*snakefood-1.3.1 (28 Feb 2009) + + 28 Feb 2009; Patrick Lauer <patrick@gentoo.org> +metadata.xml, + +snakefood-1.3.1.ebuild: + Initial import. Fixes #207716. Ebuild contributed by Pawel Hajdan Jr. Hope you don't mind the bump to 1.3.1 :)