Updated for Python3

[lfield]

No description provided.

[gwarf]

Thanks @lfield!

So as this is removing python2 support (which certainly makes sense, we need to be sure that it will behave without problems on CentOS 7 (and even 6 unfortunately).
So there may also be a need to update the related .spec file, can you please have a look?

[lfield]

Well I was planning to release it first in Fedora to address this issue. Python 3 is also the default version in RHEL 8. Maybe you should create a legacy Python 2 branch before merging this.

[gwarf]

So for your information we have a few other related issues in some of the BDII repositories: https://github.com/orgs/EGI-Foundation/projects/5

If possible I would prefer to avoid having different branch to maintain, CentOS 6 being here still for more than a year.
I just saw that python 3 (python34) is in EPEL for CentOS 6, so it maybe an acceptable dependency (as long as we have all the required python dependencies packaged).

[lfield]

Fedora (also used for EPEL) has it's own spec file. I plan to look at the BDII shortly.

[gwarf]

So it seems we will most probably move to python 3 support for the BDII, using python 3 from EPEL on CentOS 6 and CentOS 7.
To merge this PR we need to have all the packaging and other stuff ready for python 3.
If you give us write access to the PR we can try to participate too: https://help.github.com/en/articles/allowing-changes-to-a-pull-request-branch-created-from-a-fork

[gwarf]

Please also check the feedback from python-modernize: https://github.com/mitsuhiko/python-modernize

[gwarf]

LGTM, thanks!
Let's merge this long pending PR, we are now looking into releasing all the BDII components with python3 support for CentOS 7, Stream 8 and Stream 9.
We will address this in follow up PRs.