ImportError: Please install ipywidgets>=7.0.0 to use the FigureWidget class

[tfmark]

Off the back of #3686 being merged/released I wanted to revisit jupyterlite + ipywidgets + plotly, but I'm immediately failing.

Using the jupyterlite deployed here with a simple example, I get this error (which suggests ipywidgets is not installed):

Note that this example is taken from the issue above.

import micropip

await micropip.install("ipywidgets")
await micropip.install("plotly")

###

from ipywidgets import widgets

import plotly.graph_objects as go

widgets.VBox([
    widgets.HTML("<p>Start</p>"),
    go.FigureWidget(go.Scatter(x=[1, 2, 3], y=[1, 4, 9])),
    widgets.HTML("<p>End</p>"),
])

I feel like I must be doing something wrong, but don't understand what.

[nicolaskruchten]

I'm not sure what the status is of our widget with JupyterLite... has it ever worked? I.e. with Plotly 5.11 and ipywidgets 7.7? I'm not sure how JupyterLite handles federated extensions like ours :)

[tfmark]

In my local jupyterlite instance, I've discovered that installing plotly and ipywidgets before running jupyterlite build (in addition to the micropip install of plotly and ipywidgets) appears to solve the problem.

So I will close out this ticket, and if anyone else stumbles across it they have a potential solution :)

[jtpio]

I'm not sure what the status is of our widget with JupyterLite... has it ever worked? I.e. with Plotly 5.11 and ipywidgets 7.7? I'm not sure how JupyterLite handles federated extensions like ours :)

Yes it worked at some point: jupyterlite/jupyterlite#110 (comment)

But currently seems broken: jupyterlite/jupyterlite#950

JupyterLite handles federated extensions the same way, and I don't think there is anything special to Plotly happening somewhere.

Not sure if a later version of plotly changed something, maybe how the renderers are detected.

[nicolaskruchten]

so fig.show() doesn't use our ipywidget pipeline... are you sure that FigureWidget renderered in the past or just Figure?

[jtpio]

Yes that was the case in these PRs, and for quite a while after:

• Add plotly jupyterlite/jupyterlite#129
• Cleanup the Plotly example jupyterlite/jupyterlite#220 (comment)

Just tried with FigureWidget but getting the following:

Uncaught ReferenceError: require is not defined

A guess could be it tries to load the assets as if it was in the classic notebook. But requirejs is not available in lab / lite.

[nicolaskruchten]

I'm not sure what's happening in the screenshot above, but fig.show() always invokes our mime-type renderer, never our widget pathway, even on the FigureWidget class (confusing :( ). The only way to actually use our widget is to have a FigureWidget instance as the output of a cell, which is not what fig.show() does.

[jtpio]

Right, but the plotly mimetype used to be rendered fine before.

For a while we had to set os.environ['PLOTLY_RENDERER'] = 'jupyterlab' so it renders in JupyterLite. Although with a later version of plotly it was not necessary anymore.

Maybe we can try to find which version of plotlytriggers the require error and see if there is any related change.

[nicolaskruchten]

Yeah, we should separately find out why the mimetype renderer is failing. I'm still unsure whether the widget ever worked though: do you remember ever seeing a cell containing just plotly.graph_objects.FigureWidget() render an output? In addition to a cell equivalent to just plotly.graph_objects.Figure().show()?

[jtpio]

do you remember ever seeing a cell containing just plotly.graph_objects.FigureWidget() render an output? In addition to a cell equivalent to just plotly.graph_objects.Figure().show()?

Not sure, but can do some digging. Happy to track that in a new issue if it is more convenient.

[jtpio]

Happy to track that in a new issue if it is more convenient.

Opened #4143 to continue looking into this.

[pioneerRick]

The problem is still live, my codeagent.train(n_steps=200, n_episodes=2, save_path="agents/") occur the problem below: Please install ipywidgets>=7.0.0 to use the FigureWidget class.

I try many methods to solve this proble, including upgrade my pip version、upgrade ipywidges、re-install in conda command.

If any process , I'll show my solve plan