Please read the blogpost (http://blog.jupyter.org/2017/04/19/release-of-ipython-6-0/ http://blog.jupyter.org/2017/04/19/release-of-ipython-6-0/) we went to grea

Please read the blogpost (http://blog.jupyter.org/2017/04/19/release-of-ipython-6-0/ http://blog.jupyter.org/2017/04/19/release-of-ipython-6-0/) we went to great length to make sure that `pip install ipython` just install the right IPython. `pip install ipython` will just install 5.x on Python 2. So you don't have to worry about which versions are incompatible.