Blank plot in Jupyter Lab

This gives blank output in Jupyter Lab running this simple example:

import plotly.graph_objects as go
fig = go.Figure()
fig.add_trace(go.Scatter(y=[2, 1, 4, 3]))
fig.add_trace(go.Bar(y=[1, 4, 3, 2]))
fig.update_layout(title = 'Hello Figure')
fig.show()

I am running node v12.17.0 and python 3.8.2. and conda 4.8.3

[mathworld]

If it helps someone, but I’ve always used

import plotly.io as pio pio.renderers.default = "iframe"

when plotly plots don’t show up in jupyter notebook/lab.

[ismailuddin]

I’m still having this exact same problem on Windows with JupyterLab. Plotly Python package version is ‘4.8.1’, and so are the lab extensions (as installed with the version set to 4.8.1 as per the documentation). But if I launch a classic notebook, the same notebook file shows the plots. If I look at the console when inside a JupyterLab template, I get the error

Uncaught ReferenceError: require is not defined
....

                require(["plotly"], function(Plotly) {
                    window.PLOTLYENV=window.PLOTLYENV || {};
                    
                if (document.getElementById("8c520407-3036-4b5f-9834-304ee04c0f38")) {

But Plotly with JupyterLab on Mac doesn’t give me this problem…