xeus-python + JupyterLite deployed as a static site to GitHub Pages, for demo purposes.

https://jupyterlite.github.io/xeus-python-demo/notebooks/?path=demo.ipynb

• Is based on Pyodide
• Uses IPython for the code execution (access to IPython magics, support for the inline Matplotlib backend, etc)
• Provides a way to dynamically install packages with piplite (e.g. await piplite.install("ipywidgets"))
• Does not support sleeping with from time import sleep
• Does not support pre-installing packages

• Is based on xeus-python
• Uses IPython for the code execution (access to IPython magics, support for the inline Matplotlib backend, etc)
• Does not provide a way to dynamically install packages (yet. We are working on building a mamba package manager for WASM)
• Supports sleeping with from time import sleep
• Supports pre-installing packages from emscripten-forge and conda-forge, by providing an environment.yml file defining the runtime environment

Then your site will be published under https://{USERNAME}.github.io/{DEMO_REPO_NAME}

You can pre-install extra packages for xeus-python by adding them to the environment.yml file.

For example, if you want to create a JupyterLite deployment with NumPy and Matplotlib pre-installed, you would need to edit the environment.yml file as following:

name: xeus-python-kernel
channels:
  - https://repo.mamba.pm/emscripten-forge
  - conda-forge
dependencies:
  - xeus-python
  - numpy
  - matplotlib

Only no-arch packages from conda-forge and packages from emscripten-forge can be installed.

• How do I know if a package is no-arch on conda-forge? no-arch means that the package is OS-independent, usually pure-python packages are no-arch. To check if your package is no-arch on conda-forge, check if the "Platform" entry is "no-arch" in the https://beta.mamba.pm/channels/conda-forge?tab=packages page. If your package is not no-arch but is a pure Python package, then you should probably update the feedstock to turn your package into a no-arch one.
• How do I know if my package is on emscripten-forge? You can see the list of packages pubished on emscripten-forge here. In case your package is missing, or it's not up-to-date, feel free to open an issue or a PR on https://github.com/emscripten-forge/recipes.