Port to Python3 about bugwarrior

[kostajh]

@ralphbean, I'm interested in working on this. Would you prefer to have a separate branch of BW that is Python 3 compatible, or do you want to maintain a single branch using 'six'?

[ralphbean]

Hi @kostajh, that would be awesome! I guess I'd prefer to have a single branch that supports both with six. I've found this project to be really helpful to start a port https://github.com/mitsuhiko/python-modernize

I remember when I tried this last the first thing I ran into was that python-bugzilla is not python3 ready. I submitted some patches, but they fell into an abyss - https://lists.fedorahosted.org/pipermail/python-bugzilla/2012-June/000010.html.

However, it looks like they're ready to accept it now.. it just needs re-work. https://lists.fedorahosted.org/pipermail/python-bugzilla/2013-June/000105.html

[ryneeverett]

At this point, is there any reason to maintain python2 support when we do this? We're halfway to the 2020 EOL since this issue was opened and as far as I know every distro ships with python3.

[mathstuf]

Bugwarrior is an end-user application, so I don't think there's any "but dependencies care about the Python" version problems.

[coddingtonbear]

I am using bugwarrior as a library in Inthe.AM, but, really, don't worry about me; I'll adapt if you drop Python 2.7 support.

[ralphbean]

+1 from me to go all-in with python3, with condolences to @coddingtonbear.

[irl]

As I've packaged dependencies in Debian, I've made sure to build both Py 2 and Py 3 versions for them. Going pure Py 3 should be an easy transparent switch to end users when it happens.

[ryneeverett]

Closing, even though there are no doubt plenty of python3 incompatibilities yet to be found. Now that the test suite supports python3, compatibility bugs may be reported in separate issues.

For the record, it looks like we'll be supporting python2 indefinitely. Supporting both versions doesn't seem to be that big of a deal and there's no reason to break compatibility without benefit.