What minimum version of Ubuntu comes with Python 2.7.6 by default? ¿Ubuntu 14.04 has Python 2.7.6 by default?
You can see all the in updated* versions of Ubuntu: http://packages.ubuntu.com/python2.7
precise (12.04LTS) (python): Interactive high-level object-oriented language (version 2.7)
2.7.3-0ubuntu3.8 [security]: amd64 i386
2.7.3-0ubuntu3 [ports]: armhf powerpc
precise-updates (python): Interactive high-level object-oriented language (version 2.7)
2.7.3-0ubuntu3.8: amd64 armhf i386 powerpc
trusty (14.04LTS) (python): Interactive high-level object-oriented language (version 2.7)
2.7.6-8ubuntu0.2 [security]: amd64 i386
2.7.6-8 [ports]: arm64 armhf powerpc ppc64el
trusty-updates (python): Interactive high-level object-oriented language (version 2.7)
2.7.6-8ubuntu0.2: amd64 arm64 armhf i386 powerpc ppc64el
wily (python): Interactive high-level object-oriented language (version 2.7)
2.7.10-4ubuntu1: amd64 arm64 armhf i386 powerpc ppc64el
xenial (python): Interactive high-level object-oriented language (version 2.7)
2.7.11-7ubuntu1: amd64 arm64 armhf i386 powerpc ppc64el s390x
yakkety (python): Interactive high-level object-oriented language (version 2.7)
2.7.12~rc1-2: amd64 arm64 armhf i386 powerpc ppc64el s390x
* By updated I mean that they have had updates applied. Ancient versions of install media may ship older versions but they are likely the same point release, just an updated or patched build.
Ubuntu 14.10 was the first version of Ubuntu to ship with Python 2.7.6 by default. Ubuntu 15.04 came with Python 2.7.8; Ubuntu 15.10 came with Python 2.7.9; and Ubuntu 16.04 has Python 3.5.1.
Source: Distrowatch https://distrowatch.com/table.php?distribution=ubuntu