[FIXED] Invalid GUI request calling pylab with Ipython

Issue

I'm having a problem when calling ipython --pylab on ubuntu 15.04, and I keep getting this error:

[TerminalIPythonApp] WARNING | GUI event loop or pylab initialization failed
UsageError: Invalid GUI request 'qt5', valid ones are:['osx', 'qt4', 'glut', 'gtk3', 'pyglet', 'wx', 'none', 'qt', 'gtk', 'tk', None]

I can't get it straight, does someone know how to fix it by any chance?

Solution

You can pass the desired backend as a commandline option. e.g.:

ipython --pylab=qt4

Or any other in the list you got in the error message.

You could also specify the desired backend in your matplotlibrc file as described here: http://matplotlib.org/1.3.1/users/customizing.html

Answered By - Niemerds