Guido> I think version dependency management is subject to the Guido> Logajan paradox. :-(
Can you state that succintly for us? :-)
Logajan wants all code he wrote for 1.5.2 to work in 2.0, 2.1, and so on. He also complains that a script written for 2.1 doesn't work in 2.0 (and no, that's not reversed!). I conclude that he doesn't want the language to change at all.
--Guido van Rossum (home page: http://www.python.org/~guido/)