Don't enable pylab mode, when matplotlib is not importable...
Don't enable pylab mode, when matplotlib is not importable
On a headless server, matplotlib is a unnecessary dependency and the ipython
console will crash badly, when tring to enable %pylab there.
In that case, just don't enable %pylab and ask the user to install matplotlib.
Original bug report:
https://bugzilla.redhat.com/show_bug.cgi?id=872176