6.0.0 release issue for Shiny for Python apps: "Please install anywidget to use the FigureWidget class" #4996

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1. igi-chris commented on Jan 29, 2025

   

   igi-chris

   on Jan 29, 2025

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   For a reproducible example you can use one of the template apps provided by shiny that uses plotly e.g. the dashboard-tips template. Once you have shiny installed you can download the template with shiny create --template dashboard-tips --mode express --github posit-dev/py-shiny-templates, set up a virtual env and install the dependencies in the downloaded requirements.txt file.

   Using plotly 6.0.0 the plots fail as shown in the screenshot below:
   

   However, if you downgrade plotly to 5.24.1 the dashboard renders as expected:
   

   Here is the full traceback (from the 6.0.0 version):

   Traceback (most recent call last):
   File "d:\code\spikes\shiny_experiments.venv\Lib\site-packages\shiny\session_session.py", line 1450, in output_obs
   value = await renderer.render()
   ^^^^^^^^^^^^^^^^^^^^^^^
   File "d:\code\spikes\shiny_experiments.venv\Lib\site-packages\shinywidgets_render_widget_base.py", line 87, in render
   widget = as_widget(value)
   ^^^^^^^^^^^^^^^^
   File "d:\code\spikes\shiny_experiments.venv\Lib\site-packages\shinywidgets_as_widget.py", line 26, in as_widget
   res = _as_widget(x)
   ^^^^^^^^^^^^^
   File "d:\code\spikes\shiny_experiments.venv\Lib\site-packages\shinywidgets_as_widget.py", line 75, in as_widget_plotly
   return go.FigureWidget(x.data, x.layout) # type: ignore
   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   File "d:\code\spikes\shiny_experiments.venv\Lib\site-packages\plotly\missing_anywidget.py", line 13, in init
   raise ImportError("Please install anywidget to use the FigureWidget class")
   ImportError: Please install anywidget to use the FigureWidget class
2. ndrezn commented on Jan 29, 2025

   

   ndrezn

   on Jan 29, 2025

   Last edited by ndrezn

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   @marthacryan I see that anywidget is only in requires-optional: https://github.com/plotly/plotly.py/blob/master/packages/python/plotly/requires-optional.txt#L51 Should it go into a requires-jupyter or elsewhere so that it's easier to know what to install?

   This is a UX recommendation; the fix for this issue @igi-chris might be for Posit to update their templates.

   You can also:

   pip install anywidget
   

   manually in your environment to resolve the issue.

   👍React with 👍1Reacted by Chris Prosser
3. marthacryan commented on Jan 29, 2025

   

   marthacryan

   on Jan 29, 2025

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   I agree! One thing I'll note though is that this is identical to the behavior before the 6.0.0 release except that ipywidgets was substituted for anywidget as the package required. We should at the very least update the wording of the error to say pip install anywidget for clarity.

   👍React with 👍2Reacted by Chris Prosser and Timon Erhart
4. gvwilson

   assigned

   marthacryan

   on Feb 3, 2025
5. gvwilson

   added

   bugsomething brokensomething broken

   P1needed for current cycleneeded for current cycle

   documentationwritten for humanswritten for humans

   on Feb 3, 2025
6. turbotimon commented on Feb 11, 2025

   

   turbotimon

   on Feb 11, 2025

   Last edited by turbotimon

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   Please also note this line from the v6.0 release notes (it was the reason why my code failed even with anywidget manually installed):

   Fix go.FigureWidget.show to return FigureWidget instead of displaying Figure [https://github.com//pull/4869]

   Edit: No, I'm still now able to get FigureWidget to work in v6.0.0. Only downgrading solves the problem: #5027
7. gvwilson commented on Jun 17, 2025

   

   gvwilson

   on Jun 17, 2025

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   @turbotimon apologies for the slow response - when you say "still now able to get FigureWidget to work with v6.0.0" do you mean "still not able"? thanks - @gvwilson
8. turbotimon commented on Jun 18, 2025

   

   turbotimon

   on Jun 18, 2025

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   @gvwilson sorry for the unclear wording. Yes, I meant "still not able". However, I just retried my test example with plotly==6.1.2 anywidget==0.9.18 and it seems to work fine now👍 (There is still a strange behavior in colab tough, but it works in vscode notebooks #5027 (comment))

   👍React with 👍1Reacted by HemantKumar01
9. marthacryan

   removed their assignment

   on Jun 18, 2025
10. marthacryan

    closed this as completedon Jun 18, 2025