"M.-A. Lemburg" firstname.lastname@example.org writes:
For cases like the email package or distutils, I think it's perfectly OK to only provide the updates for older Python releases as separate download. Both have their own way of life, so IMHO this is acceptable.
In neither case, this is really possible: Once you have the package in the Python core, a separate installation in site-packages cannot override the core implementation.
I believe that was the motivation for Barry to consider backporting large amounts of changes. The same holds for distutils, except that there aren't that many major changes.