I haven't used python(x,y), but I would assume you can build a project from source. This is probably the best course of action right now. We are putting a lot of efforts into Enaml which has the disadvantage of making it rapidly changing. It is not surprising that the version 0.2 doesn't run some of the examples from pygotham.
FYI, EPDFree now allows to update packages including Enaml. But considering the number of commits to Enaml everyweek, I would still recommend building from source even with EPD for another few months just to get all the cool features going in.
See we are delivering on our promise to monitor SO :).
Jonathan