Description
I ran into some problems using ipywidgets and voila when I upgraded to ipywidgets 8.0.2. Effectively I no longer see any of the widgets, e.g. buttons when deploying with Voila. When opening the development console in Edge I notice a series of errors, complaining about non registered versions (Error: Module @jupyter-widgets/base, semver range ^2.0.0 is not registered as a widget module).
I do see widgets when I use a notebook instead.
When I downgrade ipywidgets to version 7.7.1 instead, I do get working widgets when using Voila. E.g. changing the pyproject.toml file and running poetry update works.
I am using poetry to set up the Python environment (3.10.2 on Windows 10) using the following configuration:
[tool.poetry.dependencies]
python = "^3.10"
ipywidgets = "8.0.2" # or 7.7.1
voila = "^0.3.6"
pip list with ipywidgets version 8.0.2 installed
Package Version
-------------------- -----------
anyio 3.6.1
argon2-cffi 21.3.0
argon2-cffi-bindings 21.2.0
asttokens 2.0.8
attrs 22.1.0
Babel 2.10.3
backcall 0.2.0
beautifulsoup4 4.11.1
bleach 5.0.1
certifi 2022.6.15.1
cffi 1.15.1
charset-normalizer 2.1.1
colorama 0.4.5
debugpy 1.6.3
decorator 5.1.1
defusedxml 0.7.1
entrypoints 0.4
executing 1.0.0
fastjsonschema 2.16.1
idna 3.3
ipykernel 6.15.2
ipython 8.5.0
ipywidgets 8.0.2
jedi 0.18.1
Jinja2 3.1.2
json5 0.9.10
jsonschema 4.16.0
jupyter_client 7.3.5
jupyter-core 4.11.1
jupyter-server 1.18.1
jupyterlab-pygments 0.2.2
jupyterlab_server 2.15.1
jupyterlab-widgets 3.0.3
lxml 4.9.1
MarkupSafe 2.1.1
matplotlib-inline 0.1.6
mistune 0.8.4
nbclient 0.5.13
nbconvert 6.5.3
nbformat 5.4.0
nest-asyncio 1.5.5
packaging 21.3
pandocfilters 1.5.0
parso 0.8.3
pickleshare 0.7.5
pip 22.2.2
prometheus-client 0.14.1
prompt-toolkit 3.0.31
psutil 5.9.2
pure-eval 0.2.2
pycparser 2.21
Pygments 2.13.0
pyparsing 3.0.9
pyrsistent 0.18.1
python-dateutil 2.8.2
pytz 2022.2.1
pywin32 304
pywinpty 2.0.7
pyzmq 23.2.1
requests 2.28.1
Send2Trash 1.8.0
setuptools 65.3.0
six 1.16.0
sniffio 1.3.0
soupsieve 2.3.2.post1
stack-data 0.5.0
terminado 0.15.0
tinycss2 1.1.1
tornado 6.2
traitlets 5.4.0
urllib3 1.26.12
voila 0.3.6
wcwidth 0.2.5
webencodings 0.5.1
websocket-client 1.4.1
websockets 10.3
wheel 0.37.1
widgetsnbextension 4.0.3
The notebook I use to test is very simple, and run the notebook using voila NOTEBOOKNAME.ipynb. For the 7.7.1 version I see a button and for 8.0.2 I do not.
import ipywidgets as widgets
from IPython.display import display
b = widgets.Button(description="Go!")
display(b)