extensions for issues: Artemis (how to upgrade to python 3.X)

[Uwe Brauer]

Hi 

One of my favorite extension is Artemis, since it allows to save the
issues in mbox format and then they can be displayed via mutt.

However it only runs under python 2.7 and soon mercurial will drop 2.7
support. The author basically told me some time ago, that he no longer
maintains actively Artemis and will not make the necessary changes to
make it run under python 3.X.

Unfortunately I have not much experience with python: is there any
documentation, of what to take into account when trying to make an
extension compatible with python 3.X?

Regards

Uwe Brauer 

PS I could also use b, but it does not display the issues as nice as
Artemis.