The package python-six is used as a shim for apps needing python3
command in python2 or python2 command in python3. The recent release
of Red Hat Enterprise Linux 6.7 brought the package into the 'base'
repositories which caused a conflict between the package inside of
EPEL and RHEL. When the CentOS-6 current release channels caught up
with the 6.7 packages, the package owner removed python-six from EPEL.

The problem is that people who are using other EL rebuilds or are
'using' an older release for various reasons no longer have access to
the package.

For people in this situation needing python-six still, the following
recommendations are possible:

0) If you are Red Hat Enterprise Linux customer, you should be able to
get the latest version from access.redhat.com.

1) Get the last koji build for EPEL in koji.
http://koji.fedoraproject.org/koji/buildinfo?buildID=549423

2) Get the CentOS package from a mirror (example:
http://mirrors.kernel.org/centos/6/os/x86_64/Packages/python-six-1.9.0-2.el6.noarch.rpm

3) Use your EL rebuilds various fast-track channels for access.

Then mirror this as a local repository for your users to have a yum repo for.

-- 
Stephen J Smoogen.