FigureWidget fails with anywidget in v6.0.0

[turbotimon]

Problem:
Since v6.0.0 FigureWidget uses anywidget. However, it fails with a java script error.

$ pip show plotly anywidget
Name: plotly
Version: 6.0.0
Summary: An open-source, interactive data visualization library for Python
Home-page: https://plotly.com/python/
Author: Chris P
Author-email: [email protected]
License: MIT
Location: /home/erti/PROJECT_repos/ForeST_HPO/hpo-innosuisse/.venv_anywidget/lib/python3.11/site-packages
Requires: narwhals, packaging
Required-by: 
---
Name: anywidget
Version: 0.9.13
Summary: custom jupyter widgets made easy
Home-page: 
Author: 
Author-email: Trevor Manz <[email protected]>
License: MIT
Location: /home/erti/PROJECT_repos/ForeST_HPO/hpo-innosuisse/.venv_anywidget/lib/python3.11/site-packages
Requires: ipywidgets, psygnal, typing-extensions
Required-by: 

import plotly.graph_objs as go
fig = go.FigureWidget()
fig.add_scatter(y=[2, 1, 4, 3])
fig

Either, no output (no figure) is shown or this is shown:

Failed to load view class 'AnyView' from module 'anywidget'
Error: No version of module anywidget is registered
    at WidgetManager.loadClass (https://file+.vscode-resource.vscode-cdn.net/home/erti/.vscode/extensions/ms-toolsai.jupyter-renderers-1.1.0/out/node_modules/%40vscode/jupyter-ipywidgets8/dist/ipywidgets.js:2:2420023)
    at WidgetManager.loadClass (https://file+.vscode-resource.vscode-cdn.net/home/erti/.vscode/extensions/ms-toolsai.jupyter-renderers-1.1.0/out/node_modules/%40vscode/jupyter-ipywidgets8/dist/ipywidgets.js:2:2803837)
    at WidgetManager.loadViewClass (https://file+.vscode-resource.vscode-cdn.net/home/erti/.vscode/extensions/ms-toolsai.jupyter-renderers-1.1.0/out/node_modules/%40vscode/jupyter-ipywidgets8/dist/ipywidgets.js:2:2417001)
    at https://file+.vscode-resource.vscode-cdn.net/home/erti/.vscode/extensions/ms-toolsai.jupyter-renderers-1.1.0/out/node_modules/%40vscode/jupyter-ipywidgets8/dist/ipywidgets.js:2:2410155
    at async Tt.renderWidget (https://file+.vscode-resource.vscode-cdn.net/home/erti/.vscode/extensions/ms-toolsai.jupyter-2024.11.0-linux-x64/dist/webviews/webview-side/ipywidgetsKernel/ipywidgetsKernel.js:17:17328)
    at async op (https://file+.vscode-resource.vscode-cdn.net/home/erti/.vscode/extensions/ms-toolsai.jupyter-2024.11.0-linux-x64/dist/webviews/webview-side/ipywidgetsKernel/ipywidgetsKernel.js:17:31113)

Workaround:
Downgrading to plotly-5.24 solves the problem

Related:
Maybe somewhat related to #4996

[marthacryan]

Could you describe the way that you installed anywidget? I was seeing this issue when I installed anywidget while JupyterLab was running without restarting it. I'm curious if restarting JupyterLab / reloading the page would help. (Still a bug, just good info for debugging)

[turbotimon]

@marthacryan I created a fresh venv with python3.11 and run pip install plotly anywidget and run the code in vscode notebook. I also restarted the kernel several times, somties just no output is shown, somtimes the json error. I also tried to run it in google colab. There, I don't see the json error, but also get no output (the figure is not shown).

[marthacryan]

Thank you for the info @turbotimon! Looks like this is an issue with plotly.js==3.0.0, which we updated to for the plotly.py==6.0.0 release. I'll investigate why this is happening but as a note, I think it may be related to removing require.js and needing to update the way that we include plotly.js.

[marthacryan]

Update here: looks like there is a PR open that does fix this issue for plotly.js: plotly/plotly.js#7367.

[marthacryan]

Plotly.js just released the 3.0.1 patch which will fix this! We'll need to update the plotly.js version in plotly.py, so I'll wait on that to close this issue.