iPython 4.0 breaks shell_plus notebook

Upgrading to iPython 4.0 will create an error when running python manage.py shell_plus --notebook:

.virtualenvs/django-q/lib/python3.4/site-packages/jupyter_client/kernelspec.py", line 143, in get_kernel_spec
    raise NoSuchKernel(kernel_name)
jupyter_client.kernelspec.NoSuchKernel: 'python'

I’ve tested this with both Python 2.7.9 and 3.4.2. Downgrading to iPython 3.2.1 returns everything to normal.

[hanleybrand]

One thing to note if you’ve tried

pip install -U git+git://github.com/django-extensions/django-extensions.git@92008a391c6357d7896a65ea74ac103664e21ddc

and it’s not working because

The `IPython.html` package has been deprecated. You should import from `notebook` instead. `IPython.html.widgets` has moved to `ipywidgets`.
  "`IPython.html.widgets` has moved to `ipywidgets`.", ShimWarning)

Traceback ([EDITED]):
....
  File ".../django_extensions/management/commands/shell_plus.py", line 353, in handle_noargs
    shell = get_notebook()
  File ".../django_extensions/management/commands/shell_plus.py", line 119, in get_notebook
    from IPython.html.notebookapp import NotebookApp
ImportError: No module named notebookapp

even though it may seem like there’s still a problem with django-extensions, it may be that you didn’t install ipython with notebook support. In this case, try:

pip install -U "ipython[notebook]"

[trbs]

@hanleybrand please (re)try with 9648b292614110852d6e233b91a78d328688c819 it should now try the new notebook package first. This should get rid of the error at startup.