I am new to Python to bear with me.
Is there a package from your distro? If you're using ubuntu you must to install the ipython3-notebook package. If not, maybe you must to install ipython with python3.
If you've run (because it's python2 by default)
python setup.py
you must to run instead
python3 setup.py install
to install a package with python3 instead python2. This will be a new instalation of ipython3.