Jupyter-Lab Extension Not Working On Fresh Install

[the-dude-26637]

Hi, have been trying to get perspective-python's jupyter-lab extension working and it appears the default versions installed do not work with my setup.

I'm using miniconda and setting up a fresh environment with:

conda create --name myenv python=3.9
conda activate myenv
mamba install jupyterlab
jupyter labextension install @jupyter-widgets/jupyterlab-manager
jupyter labextension install @finos/perspective-jupyterlab
pip install perspective-python

Upon running a jupyter-lab instance:
nohup jupyter-lab --ip=0.0.0.0 --port=8000 &

And going to a notebook which follows the example in the docs, I get the following errors:

Where both errors have the same message:

[Open Browser Console for more detailed log - Double click to close this message]
Failed to create view for 'PerspectiveView' from module '@finos/perspective-jupyterlab' with model 'PerspectiveModel' from module '@finos/perspective-jupyterlab'
TypeError: Cannot set property pWidget of # which has only a getter
    at vk._createElement (http://xxxxxxxxxxxx:8000/static/lab/3722.36a76516714fa770dbd0.js?v=36a76516714fa770dbd0:2:6354670)
    at vk._ensureElement (http://xxxxxxxxxxxx:8000/static/lab/3790.674d5c44d4c385d70a97.js?v=674d5c44d4c385d70a97:1:40917)
    at new e.View (http://xxxxxxxxxxxx:8000/static/lab/3790.674d5c44d4c385d70a97.js?v=674d5c44d4c385d70a97:1:39530)
    at new E (http://xxxxxxxxxxxx:8000/static/lab/3790.674d5c44d4c385d70a97.js?v=674d5c44d4c385d70a97:1:4951)
    at new I (http://xxxxxxxxxxxx:8000/static/lab/3790.674d5c44d4c385d70a97.js?v=674d5c44d4c385d70a97:1:12832)
    at new z (http://xxxxxxxxxxxx:8000/static/lab/3790.674d5c44d4c385d70a97.js?v=674d5c44d4c385d70a97:1:14547)
    at new vk (http://xxxxxxxxxxxx:8000/static/lab/3722.36a76516714fa770dbd0.js?v=36a76516714fa770dbd0:2:6354604)
    at http://xxxxxxxxxxxx:8000/static/lab/4416.16af61eee93a509ceee9.js?v=16af61eee93a509ceee9:1:4337
    at async w.renderModel (http://xxxxxxxxxxxx:8000/lab/extensions/@jupyter-widgets/jupyterlab-manager/static/134.083e6b37f2f7b2f04b5e.js?v=083e6b37f2f7b2f04b5e:1:72264)

---

I've tried a few downgraded version combinations and it got messy with no success, but first and foremost should inform that the sequence of commands above which follows the docs does not work and would like to confirm if others can replicate this.

And if anyone has it working, alternatively, could they please share a requirements.txt or conda list output with working version numbers?

Thank you in advance

---

My full conda list output is:

# Name                    Version                   Build  Channel
_libgcc_mutex             0.1                        main
_openmp_mutex             5.1                       1_gnu
anyio                     3.5.0            py39h06a4308_0
argon2-cffi               21.3.0             pyhd3eb1b0_0
argon2-cffi-bindings      21.2.0           py39h7f8727e_0
asttokens                 2.0.5              pyhd3eb1b0_0
attrs                     21.4.0             pyhd3eb1b0_0
babel                     2.9.1              pyhd3eb1b0_0
backcall                  0.2.0              pyhd3eb1b0_0
beautifulsoup4            4.11.1           py39h06a4308_0
bleach                    4.1.0              pyhd3eb1b0_0
brotlipy                  0.7.0           py39h27cfd23_1003
ca-certificates           2022.07.19           h06a4308_0
certifi                   2022.6.15        py39h06a4308_0
cffi                      1.15.1           py39h74dc2b5_0
charset-normalizer        2.0.4              pyhd3eb1b0_0
cryptography              37.0.1           py39h9ce1e76_0
debugpy                   1.5.1            py39h295c915_0
decorator                 5.1.1              pyhd3eb1b0_0
defusedxml                0.7.1              pyhd3eb1b0_0
entrypoints               0.4              py39h06a4308_0
executing                 0.8.3              pyhd3eb1b0_0
future                    0.18.2                   pypi_0    pypi
idna                      3.3                pyhd3eb1b0_0
ipykernel                 6.9.1            py39h06a4308_0
ipython                   8.4.0            py39h06a4308_0
ipython_genutils          0.2.0              pyhd3eb1b0_1
ipywidgets                8.0.1                    pypi_0    pypi
jedi                      0.18.1           py39h06a4308_1
jinja2                    3.0.3              pyhd3eb1b0_0
json5                     0.9.6              pyhd3eb1b0_0
jsonschema                4.4.0            py39h06a4308_0
jupyter_client            7.2.2            py39h06a4308_0
jupyter_core              4.10.0           py39h06a4308_0
jupyter_server            1.18.1           py39h06a4308_0
jupyterlab                3.4.4            py39h06a4308_0
jupyterlab-widgets        3.0.2                    pypi_0    pypi
jupyterlab_pygments       0.1.2                      py_0
jupyterlab_server         2.12.0           py39h06a4308_0
ld_impl_linux-64          2.38                 h1181459_1
libffi                    3.3                  he6710b0_2
libgcc-ng                 11.2.0               h1234567_1
libgomp                   11.2.0               h1234567_1
libsodium                 1.0.18               h7b6447c_0
libstdcxx-ng              11.2.0               h1234567_1
markupsafe                2.1.1            py39h7f8727e_0
matplotlib-inline         0.1.2              pyhd3eb1b0_2
mistune                   0.8.4           py39h27cfd23_1000
nbclassic                 0.3.5              pyhd3eb1b0_0
nbclient                  0.5.13           py39h06a4308_0
nbconvert                 6.4.4            py39h06a4308_0
nbformat                  5.3.0            py39h06a4308_0
ncurses                   6.3                  h5eee18b_3
nest-asyncio              1.5.5            py39h06a4308_0
notebook                  6.4.12           py39h06a4308_0
numpy                     1.23.2                   pypi_0    pypi
openssl                   1.1.1q               h7f8727e_0
packaging                 21.3               pyhd3eb1b0_0
pandas                    1.4.3                    pypi_0    pypi
pandocfilters             1.5.0              pyhd3eb1b0_0
parso                     0.8.3              pyhd3eb1b0_0
perspective-python        1.6.3                    pypi_0    pypi
pexpect                   4.8.0              pyhd3eb1b0_3
pickleshare               0.7.5           pyhd3eb1b0_1003
pip                       22.1.2           py39h06a4308_0
prometheus_client         0.14.1           py39h06a4308_0
prompt-toolkit            3.0.20             pyhd3eb1b0_0
ptyprocess                0.7.0              pyhd3eb1b0_2
pure_eval                 0.2.2              pyhd3eb1b0_0
pycparser                 2.21               pyhd3eb1b0_0
pygments                  2.11.2             pyhd3eb1b0_0
pyopenssl                 22.0.0             pyhd3eb1b0_0
pyparsing                 3.0.4              pyhd3eb1b0_0
pyrsistent                0.18.0           py39heee7806_0
pysocks                   1.7.1            py39h06a4308_0
python                    3.9.12               h12debd9_1
python-dateutil           2.8.2              pyhd3eb1b0_0
python-fastjsonschema     2.15.1             pyhd3eb1b0_0
pytz                      2022.1           py39h06a4308_0
pyzmq                     23.2.0           py39h6a678d5_0
readline                  8.1.2                h7f8727e_1
requests                  2.28.1           py39h06a4308_0
send2trash                1.8.0              pyhd3eb1b0_1
setuptools                61.2.0           py39h06a4308_0
six                       1.16.0             pyhd3eb1b0_1
sniffio                   1.2.0            py39h06a4308_1
soupsieve                 2.3.1              pyhd3eb1b0_0
sqlite                    3.39.2               h5082296_0
stack_data                0.2.0              pyhd3eb1b0_0
terminado                 0.13.1           py39h06a4308_0
testpath                  0.6.0            py39h06a4308_0
tk                        8.6.12               h1ccaba5_0
tornado                   6.1              py39h27cfd23_0
traitlets                 5.1.1              pyhd3eb1b0_0
typing-extensions         4.3.0            py39h06a4308_0
typing_extensions         4.3.0            py39h06a4308_0
tzdata                    2022a                hda174b7_0
urllib3                   1.26.11          py39h06a4308_0
wcwidth                   0.2.5              pyhd3eb1b0_0
webencodings              0.5.1            py39h06a4308_1
websocket-client          0.58.0           py39h06a4308_4
wheel                     0.37.1             pyhd3eb1b0_0
widgetsnbextension        4.0.2                    pypi_0    pypi
xz                        5.2.5                h7f8727e_1
zeromq                    4.3.4                h2531618_0
zlib                      1.2.12               h7f8727e_2

[timkpaine]

To start I would test against ipywidgets 7, I believe 8 is relatively new and may have breaking changes as it is a major version.

[the-dude-26637]

Thanks Tim

Tried this and getting the same error.

pip install ipywidgets==7.5.1

It then prompted me to run jupyter lab build which looked promising

But upon completion and re-running (and restarting the jupyter-lab instance), same result

Failed to create view for 'PerspectiveView' from module '@finos/perspective-jupyterlab' with model 'PerspectiveModel' from module '@finos/perspective-jupyterlab'
TypeError: Cannot set property pWidget of # which has only a getter

Seeing a couple console errors too (screenshot below) which might now be unrelated to perspective-python, notably

Error: Module @jupyter-widgets/base, version ^1.2.0 is not registered, however,         2.0.0 is

Unsure how to interpret this because there isn't a single thing that's version 1.2.0 or 2.0.0 in my conda list or jupyter labextension list output. Using the following versions:

ipython                   7.31.1           py39h06a4308_1
ipython_genutils          0.2.0              pyhd3eb1b0_1
ipywidgets                7.5.1                    pypi_0    pypi
jupyter_client            7.2.2            py39h06a4308_0
jupyter_core              4.10.0           py39h06a4308_0
jupyter_server            1.4.1            py39h06a4308_0
jupyterlab                3.3.2              pyhd3eb1b0_0
jupyterlab-widgets        3.0.2                    pypi_0    pypi
jupyterlab_pygments       0.1.2                      py_0
jupyterlab_server         2.10.3             pyhd3eb1b0_1

/home/ubuntu/miniconda3/envs/ppp2/share/jupyter/labextensions
        @jupyter-widgets/jupyterlab-manager v5.0.2 enabled OK (python, jupyterlab_widgets)

Other labextensions (built into JupyterLab)
   app dir: /home/ubuntu/miniconda3/envs/ppp2/share/jupyter/lab
        @finos/perspective-jupyterlab v1.6.3 enabled OK

---

(Browser console output promised above)

[timkpaine]

Your jupyterlab is still using the new version of the ipywidgets JavaScript, I would delete your conda env and rebuild it from scratch with only ipywidgets 7.

[the-dude-26637]

Did this and same error, using this sequence again (please lmk if I'm doing something incorrect)

conda create --name ppp python=3.9
conda activate ppp
pip install ipywidgets==7.5.1
pip install jupyterlab
jupyter labextension install @jupyter-widgets/jupyterlab-manager
jupyter labextension install @finos/perspective-jupyterlab
pip install perspective-python

How can you tell which JavaScript ipwidgets is running?
The minimum version of jupyterlab I can run is 3.3.2 with perspective-python==1.6.3, should I try an older perspective-python version?

[timkpaine]

I doubt very much that these errors have to do with perspective, more likely they have to do with breaking changes in jupyter or it's widgets. @jupyter-widgets/jupyterlab-manager is the widgets extension, try installing v4 instead of latest.

[the-dude-26637]

Got it working after running the following per your suggestion:

jupyter labextension install @jupyter-widgets/jupyterlab-manager@3.1.1

Thank you very much for the help timkpaine.

---

For others reading, the full setup would be:

conda create --name myenv python=3.9
conda activate myenv
pip install ipywidgets==7.5.1
pip install jupyterlab
jupyter labextension install @jupyter-widgets/jupyterlab-manager@3.1.1
jupyter labextension install @finos/perspective-jupyterlab
pip install perspective-python

[timkpaine]

no problem, we'll add it to the backlog to see whats going on with newer ipywidgets code, ive seen some noise on other repos as well