compatibility with F20's python 2.7.5-12

background story: http://lists.ovirt.org/pipermail/devel/2014-June/007813.html
My problem here is how to detect this particular version, and to avoid to break on non-RH distros as well (e.g. debian, gentoo).

On my F20, sys.version_info is just:

$ python
Python 2.7.5 (default, Jun 19 2014, 12:16:30) 
[GCC 4.8.2 20131212 (Red Hat 4.8.2-7)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> print(sys.version_info)
sys.version_info(major=2, minor=7, micro=5, releaselevel='final', serial=0)
>>> 
$ rpm -qi python | grep -i version
Version     : 2.7.5
$ rpm -qi python | grep -i release
Release     : 12.fc20

So I thought than actually checking the args was the simplest and cleanest way.