Hiho..  I wanted to use this as a library in a Python 3.x application, so I 
went ahead and made the necessary modifications to make it run under both 2.x 
and 3.x (patch is attached)

It passes all the provided tests, and works nicely for my project with the 
patch applied, but I do note that one of the things I had to fiddle with a bit 
is the different way that file IO is handled (particularly with respect to 
newlines) in Py3.  I think the changes I made should result in similar behavior 
in both versions, but I haven't done really extensive testing...