supported versions policy?

[Gary Wilson]

Does Python have a formal policy on the support lifetime (bug fixes,
security fixes, etc.) for major and minor versions?  I did a bit of
searching on the Python web site and this group, but didn't find
anything.  If there is a policy posted somewhere (and I just didn't
dig deep enough), would someone please point me in the right
direction.  If there is no posted policy, would someone be kind enough
to describe the practiced policy here.

I'm looking for is something like this:
http://docs.djangoproject.com/en/dev/internals/release-process/#supported-versions

Thanks,
Gary