Maintaining a backported module

[Steven D'Aprano]

As some of you are aware, I have a module accepted into the standard 
library:

http://docs.python.org/3.4/library/statistics.html

I'm now at the point where I wish to backport this module to support 
versions of Python back to 3.1 at least and possibly 2.7, and put it up 
on PyPI.

I'm looking for advice on best practices for doing so. Any suggestions 
for managing bug fixes and enhancements to two separate code-bases 
without them diverging too much?

Other than "Avoid it" :-)



-- 
Steven