I took this question to be, how do I find, which releases contain a certain version of a package.
You can find a lot of information by looking at the ubuntu packages site. I just searched for the package 'python3' in all versions of ubuntu:-
http://packages.ubuntu.com/search?suite=all§ion=all&arch=any&keywords=python3&searchon=names
It came up with this:-
Package python3
- precise (12.04LTS) (python): interactive high-level object-oriented language (default python3 version)
3.2.3-0ubuntu1: all
- precise-updates (python): interactive high-level object-oriented language (default python3 version)
3.2.3-0ubuntu1.2: amd64 i386
- trusty (14.04LTS) (python): interactive high-level object-oriented language (default python3 version)
3.4.0-0ubuntu2: amd64 i386
- utopic (python): interactive high-level object-oriented language (default python3 version)
3.4.2-1: amd64 i386
- vivid (python): interactive high-level object-oriented language (default python3 version)
3.4.3-1: amd64 i386
- wily (python): interactive high-level object-oriented language (default python3 version)
3.4.3-4ubuntu1: amd64 i386
Hence I think Python version 3.4 is in trusty, utopic, vivid and wily
It would be helpful, if who-ever on launchpad marked something as fixed, identified which version of python contains a particular fix, but as the discussion on launchpad said, that's not straight forward (and I'd argue, it's not an ubuntu specific issue either).
whatever-3.4.6-ubuntu6.3+build3, for example) has the fix in it or not... this is what I think the OP is asking - true? If yes, think editing the question to make it a bit clearer. – Rmano Sep 23 '15 at 07:54:s/version(s) of the package/release(s)/;-) – Rmano Sep 23 '15 at 10:27