Applies To

• Notebooks (.ipynb files)
• Interactive Window and/or Cell Scripts (.py files with #%% markers)

What happened?

Issue description

Jupyter in VSCode is unable to render the Altair plot. This happens when using boxplot on repeat and set the renderer to mimetype

Steps to reproduce the issue

import altair as alt
from vega_datasets import data

# Show an image where the interactive plot is not supported
alt.renderers.enable('mimetype')

source = data.cars()

alt.Chart(source).mark_boxplot().encode(
    x='Origin',
    y=alt.Y(alt.repeat('column'), type='quantitative'),
).repeat(column=['Horsepower', 'Weight_in_lbs'])

What's the actual result?

TypeError: e.map is not a function

Additional details / screenshot

Altair Package Version

4.1.0

VS Code Version

Version: 1.61.2 Commit: 6cba118ac49a1b88332f312a8f67186f7f3c1643 Date: 2021-10-19T15:03:09.437Z Electron: 13.5.1 Chrome: 91.0.4472.164 Node.js: 14.16.0 V8: 9.1.269.39-electron.0 OS: Darwin arm64 20.6.0

Jupyter Extension Version

v2021.9.1101343141

Jupyter logs

TypeError: e.map is not a function

Coding Language and Runtime Version

Python v3.9.7 64-bit

Language Extension Version (if applicable)

No response

Anaconda Version (if applicable)

No response

Running Jupyter locally or remotely?

Local