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bollwyvl/nbconvert-in-jupyterlite.ipynb

Last active January 6, 2026 16:25
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nbconvert in jupyterlite
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@hgustafsson
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hgustafsson commented Dec 9, 2025 •
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Thank you for writing these notes!
Based on your research I was able to write an updated (i.e. working on the latest Jupyterlite) and more concise example from scratch using piplite's add_mock_package and without any changes to source files or any copying of templates (which wasn't needed at least in this Jupyterlite version).
Hopefully this will make it easier to implement it as a new custom JupyterLite exporter addon, but I don't know how to create one.

The code (added below) was tested on Jupyterlite 0.7.1 at https://jupyterlite.readthedocs.io/en/stable/_static/lab/index.html

INPUT = "python.ipynb"
OUTPUT = "python.html"

import piplite
piplite.piplite.micropip.add_mock_package("nbclient", "0.10.2", modules = 
      {"nbclient": "",
       "nbclient.exceptions": "def CellExecutionError(): pass"
      })
piplite.piplite.micropip.add_mock_package("fakenbconvert", "0.0.0", modules = 
      {"nbconvert.preprocessors.execute": "def ExecutePreprocessor(*args): return args"
      })
await piplite.install(["nbconvert", "bleach", "tinycss2", "bs4"])

from nbconvert.exporters import HTMLExporter
exporter = HTMLExporter()
(html, res) = exporter.from_filename(INPUT)

from pathlib import Path
Path(OUTPUT).write_text(html)

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