Error loading Jupyter Notebook Extensions
jupyter, jupyter-notebook, python
Solution
I had the same problem. Here is how I solved it.
I have downloaded Anaconda python version 3.7. I already had Python 3.6.7 on my system.
I'd get this error if I did:
pip install jupyter_contrib_nbextensions
To solve it, I did:
python3.7 -m pip install jupyter_contrib_nbextensions
I have not tried this, but this could solve your problem too:
conda install -c conda-forge jupyter_nbextensions_configurator
So I guess the problem is because of there being multiple versions of Python on your system. The one which Anaconda uses and the one which the "normal pip" uses are probably different.
Problem
I am using a Macbook with OS Sierra, and running Python 3.6.1 and Jupyter Notebook Server 5.0.0 I installed Jupyter Notebook extensions, following the instructions as mentioned on https://github.com/ipython-contrib/jupyter_contrib_nbextensions While the notebooks work fine on my system, I cannot view the nbextensions tab. The following is the error log I see on running `jupyter notebook` in terminal. I have seen some related problems posted here on SO, but they seem to be about installing specific extensions. Further, one of the solutions seemed to be suggest `pip install jupyter_nbextensions_configurator`, but as can be seen from the output below, I already have the extension installed. ``` Requirement already satisfied: traitlets in /usr/local/lib/python3.6/site-packages (from jupyter_nbextensions_configurator) Requirement already satisfied: tornado in /usr/local/lib/python3.6/site-packages (from jupyter_nbextensions_configurator) ``` However, in the logs, you will notice that `ModuleNotFoundError: No module named 'jupyter_nbextensions_configurator'` is one of the error messages. ``` [W 08:44:49.973 NotebookApp] server_extensions is deprecated, use nbserver_extensions [W 08:44:50.146 NotebookApp] Error loading server extension jupyter_nbextensions_configurator Traceback (most recent call last): File "/usr/local/lib/python3.6/site-packages/notebook/notebookapp.py", line 1271, in init_server_extensions mod = importlib.import_module(modulename) File "/usr/local/Cellar/python3/3.6.1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/importlib/__init__.py", line 126, in import_module return _bootstrap._gcd_import(name[level:], package, level) File "<frozen importlib._bootstrap>", line 978, in _gcd_import File "<frozen importlib._bootstrap>", line 961, in _find_and_load File "<frozen importlib._bootstrap>", line 948, in _find_and_load_unlocked ModuleNotFoundError: No module named 'jupyter_nbextensions_configurator' [I 08:44:50.158 NotebookApp] Serving notebooks from local directory: /Users/sp [I 08:44:50.158 NotebookApp] 0 active kernels [I 08:44:50.158 NotebookApp] The Jupyter Notebook is running at: http://localhost:8888/?token=c777a7ab5dc6cf416c238b7b37f58d10ebea9db0743b46ae [I 08:44:50.158 NotebookApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation). [C 08:44:50.163 NotebookApp] Copy/paste this URL into your browser when you connect for the first time, to login with a token: http://localhost:8888/?token=c777a7ab5dc6cf416c238b7b37f58d10ebea9db0743b46ae [I 08:44:51.633 NotebookApp] Accepting one-time-token-authenticated connection from ::1 [W 08:44:54.407 NotebookApp] 404 GET /nbextensions/nbextensions_configurator/tree_tab/main.js?v=20170511084449 (::1) 25.76ms referer=http://localhost:8888/tree ``` What am I missing here? Thanks!