Comment 3 for bug 1600270

I have tried to build the package from source, and it worked. However, the built package did not work on a live cd version of the same system (ubuntu 16.04.1amd64), this means that the trouble is not in the binary version, but in some dependencies. Comparing dependencies for the source code and binary packet I have found that it is enough just to additionally install python-qt4 to make python scripting starts to work.

So solution will be
sudo apt-get install python-qt4

IMHO this is not a bug and even not a broken dependence, because qtiplot may still work without python scripting (and many users even do not need it). So, the thread, probably, may be closed.