Hi, I very much know the maintainer of the blockdiag suite isn't very fast to react to issues, and sometimes completely unresponsive (I've seen this in the past), and also these packages haven't been updated since oldstable. So I've uploaded fixes to the DELAYED/2 queue for:
actdiag nwdiag seqdiag sphinxcontrib-actdiag sphinxcontrib-blockdiag sphinxcontrib-nwdiag sphinxcontrib-seqdiag (debdiffs attached to the matching bugs). I've also filed a bug for rabbit since it looks like Matthias forgot to file a bug for that package. Let's give rabbit maintainers a bit of time to see if they fix it. Once they are done, then we can safely remove Python 2 support from blockdiag. If nothing happens on the rabbit maintainer side (hopefully, they will react soon...), then maybe we can NMU the fix there too. IMO, that's a much better approach than just stalled things, or reverting the work done on python-zc.buildout. Cheers, Thomas Goirand (zigo)