ImportError: No module named notebook.notebookapp

Question

For 4.0 and above You need to install the notebook app separately from https://github.com/jupyter/notebook

pip install jupyter

conda install jupyter will install latest jupyter along with other required dependencies

The following packages will be downloaded:

package                    |            build
---------------------------|-----------------
mistune-0.7                |           py27_0         186 KB
jinja2-2.8                 |           py27_0         263 KB
jupyter_core-4.0.3         |           py27_0          25 KB
tornado-4.2.1              |           py27_0         515 KB
jupyter_client-4.0.0       |           py27_0          88 KB
nbformat-4.0.0             |           py27_0         112 KB
ipykernel-4.0.3            |           py27_0         111 KB
nbconvert-4.0.0            |           py27_0         266 KB
jupyter_console-4.0.0      |           py27_0          22 KB
notebook-4.0.1             |           py27_0         4.2 MB
qtconsole-4.0.0            |           py27_0         120 KB
ipywidgets-4.0.2           |           py27_0          93 KB
jupyter-1.0.0              |           py27_0           2 KB
------------------------------------------------------------
                                       Total:         6.0 MB

This two commands will fix most problems for you:

sudo pip install --upgrade setuptools pip
sudo pip install --upgrade "ipython[all]"

I got the same problem when upgrading ipython. This is a bug linked to the latest 4 version, I recommend you switch back to the stable version 3.2.1:

pip uninstall -y ipython
pip install ipython==3.2.1

• note: the -y option indicates "yes I want to uninstall" with no interaction
• note 2: possible duplicate in ipython server can't launch: No module named notebook.notebookapp

if you are using python version 2

pip install jupyter

in case using python 3.x

pip3 install jupyter

to be on the safe side also check that notebook module is installed or not

pip install notebook

or

pip3 install notebok