Trying to build python3 version of scikit-learn, python3-* pkgs come out empty

The scikit-learn packaging only builds python2 packages, even though upstream does support python3 (this is bug #730532). I happen to need scikit with python3 so I tried to update the packaging using the instructions at https://wiki.debian.org/Python/Pybuild , but I consistently get a python3-skle

replacement for ipython(3)-notebook?

ipython(3)-notebook has been dropped from unstable with the transition to ipython 5.0.0. What package now provides this functionality? zw

What to do when a source package has Python components in a subdir?

Since Python policy is being revamped just now I thought I'd bring up a complicated situation that I ran across recently (in packages that are currently just for private use, but I might try to get them into Debian eventually). Consider a source package that builds a shared library, Python bindin