Jupyter Notebooks not displaying progress bars
The answer is in this GitHub issue.
The key is to ensure that you have the ipywidgets
notebook extension enabled using the following command:
jupyter nbextension enable --py widgetsnbextension
For the old JupyterLab 2.0 you'll also need to install the JupyterLab extension:
jupyter labextension install @jupyter-widgets/jupyterlab-manager
For the old JupyterLab 2.0 installing the JupyterLab extension with the command above requires that you have Node.js installed. The installer from the Node.js website includes npm
, which is also required for the command to run properly.
When using JupyterLab 3.0, the extension will be auto-installed together with ipywidgets
when you install it with pip
or conda
. Node.js is no longer required for JupyterLab 3.0.
An important consideration here is to have node version >=10.0.0 for this to work.To check your node version use:
node -v
Also, you may have a version of node >=10 installed, but not selected. To check the list of installed node versions, you can use the node version manager nvm
using:
nvm ls
In the example below, the selected version is 9.11.2:
-> v9.11.2 v10.4.0 v12.5.0
In order to fix this, I will have to run:
nvm use 12.5.0
Now, I can run the two commands mentioned by @Mihai:
jupyter nbextension enable --py widgetsnbextensionjupyter labextension install @jupyter-widgets/jupyterlab-manager
It should work now after refreshing the Jupyter
browser tab.
Read all of it before executing a command:
I followed all the instructions here, multiple times, nothing worked.
In my last try, I did:
Create new environment and install jupyterlab
From https://github.com/nodesource/distributions/blob/master/README.md#debinstall:
# Using Ubuntucurl -fsSL https://deb.nodesource.com/setup_15.x | sudo -E bash -sudo apt-get install -y nodejs# Using Debian, as rootcurl -fsSL https://deb.nodesource.com/setup_15.x | bash -apt-get install -y nodejs
then:
conda install -c conda-forge nodejsjupyter labextension install @jupyter-widgets/jupyterlab-managerconda install -c conda-forge ipywidgets
Still it didnt work. Then as advised here, I did:
jupyter labextension install js
Restarted jupyter lab, tried the code:
import ipywidgets as widgetswidgets.IntSlider()
And it finally worked. So I guess what was missing was to install js through jupyter labextension.