Ipywidgets and JupyterLab

[jquacinella]

I have seen a few other people complain about this issue, but I am having trouble getting ipywidgets to work with JupyterLab. I setup a conda environment and installed jupyter lab, and various other extensions. I made sure to follow https://github.com/jupyter-widgets/ipywidgets/tree/master/packages/jupyterlab-manager#version-compatibility to stay compatible. I have jupyterlab 0.35.4, and jupyterlab-manager 0.38.1.

Related issues?

• Installing the ipywidgets for jupyterlab breaks #2006
• ipywidgets don't work on Jupyterlab  #2285

Here is the error from the chrome inspector:

Error displaying widget
vendors~main.97aacf046fa0e7539513.js:1081304 Module @jupyter-widgets/base, semver range ^1.2.0 is not registered as a widget module

Here are the versions of jupyterlab, ipywidgets and the manager extension:

(jupyter_shared) /work$ conda list -e | grep ipy
WARNING: The conda.compat module is deprecated and will be removed in a future release.
ipydatawidgets=4.0.0=py_0
ipykernel=5.1.1=py37h24bf2e0_0
ipyleaflet=0.11.0=py37_0
ipympl=0.2.1=py37_1002
ipyscales=0.3.0=py_0
ipython=7.6.0=py37h5ca1d4c_0
ipython_genutils=0.2.0=py_1
ipyvolume=0.5.1=py37_1001
ipywebrtc=0.4.3=py37_1000
ipywidgets=7.5.0=py_0
scipy=1.3.0=py37h921218d_0

(jupyter_shared) /work$ jupyter lab  --version
0.35.4

(jupyter_shared) /work$ jupyter lab notebook --version
0.35.4

(jupyter_shared) /work$ jupyter labextension list
JupyterLab v0.35.4
Known labextensions:
   app dir: /work/anaconda3/envs/jupyter_shared/share/jupyter/lab
        @jupyter-widgets/jupyterlab-manager v0.38.1  enabled  OK
        @jupyter-widgets/jupyterlab-sidecar v0.3.0  enabled  OK
...

Another thing I did was install the kernel-spy extension to take a view of the kernel messages and this came back in one of the JSON messages under iopub.content.traceback:

"KeyError Traceback (most recent call last)"
"/work/anaconda3/envs/jupyter_shared/lib/python3.7/site-packages/ipywidgets/widgets/widget.py in _handle_msg(self, msg)  
"""Called when a msg is received from the front-end"""  
data = msg['content']['data'] 
--> method = data['method'] 

"KeyError: 'method'

Please let me know if there is anything else I can put in this ticket to help solve this.

[jquacinella]

Further note: switching to the classic notebook interface works in that a slider is shown for:

import ipywidgets
ipywidgets.IntSlider()

This same cell breaks, as per above, in the JupyterLab interface.

[hainm]

I am not sure if this's helpful, but I have below recipe that works for a while (not sure about "now")

pythonversion=3.7
labversion=0.34.12
labmanagerversion=0.37.4
ipywidgetsversion=7.4.2

conda create -n lab python=$pythonversion -y
source activate lab
conda install ipywidgets=$ipywidgetsversion -c conda-forge -y
conda install jupyterlab=$labversion  -y -c conda-forge
jupyter-labextension install @jupyter-widgets/jupyterlab-manager@$labmanagerversion

I think the idea is to make very simple setup work first and then gradually adding more extensions until it breaks.

[dazzag24]

I have similar issue.

import ipywidgets ipywidgets.IntSlider()

results in a

Error displaying widget

message. The browser console log contains this error:

Module @jupyter-widgets/base, semver range ^1.2.0 is not registered as a widget module default.js:132 Error displaying widget renderer.js:45 Module @jupyter-widgets/base, semver range ^1.2.0 is not registered as a widget module renderer.js:46 Error displaying widget renderer.js:45 Module @jupyter-widgets/base, semver range ^1.2.0 is not registered as a widget module

My env is (note that I am using pipenv and not conda to install packages)

python --version Python 3.6.7

pipenv graph | grep ipyw ipywidgets [required: >=7.0.0a8, installed: 7.5.0]

jupyter lab --version 0.35.6

jupyter labextension list JupyterLab v0.35.6 Known labextensions: app dir: /home/xxxx/.local/share/virtualenvs/apiclient-xx/share/jupyter/lab @jupyter-widgets/jupyterlab-manager v0.38.1 enabled OK bqplot v0.4.6 enabled OK jupyter-leaflet v0.11.1 enabled OK

[pbugnion]

Thanks for raising this.

There were lots of compatibility issues between ipywidgets and JupyterLab in the lead-up to JupyterLab 1.x release.

This now refers to an outdated version of JupyterLab and of @jupyter-widgets/jupyterlab-manager. Feel free to re-open if you're still having issues with JupyterLab 1.x.

[jtlz2]

@pbugnion I'm still having an issue with this and no answer I have found here or on stackoverflow etc. resolves it.

jupyterlab 1.2.6
ipywidgets 7.5.1

Any ideas?

Thanks

[jtlz2]

@hainm Finally!! Thank you so so much!

[jtlz2]

Does anyone have any idea of the next highest combination of version numbers that works?

I'd like to take advantage of the latest jupyterlab/widget updates e.g. fileupload etc.

Can anyone raise @hainm's excellent combination of

pythonversion=3.7
labversion=0.34.12
labmanagerversion=0.37.4
ipywidgetsversion=7.4.2

?