This is rather unfortunate -- a lot of the world is still on Python 2 - I didn't think it's meant to be EOL until 2020? I just ran into this in looking at installing the new version of OMERO - http://www.openmicroscopy.org/site/support/omero/sysadmins/version-requirements.html says that they do not support Python 3 but OMERO 5.4 will no longer support Ice 3.5 at all, which would leave me in a tricky situation.
I did try using ZeroC's http://zeroc.com/download/apt/debian8 as an alternative but their zeroc-ice-compilers_3.6.3-1000_amd64.deb doesn't include slice2java. (I probably just don't know what I'm doing though!) -- Mark
