Very cool! Kind of seems like a relic at this point though, good for studying but probably better to use Pyodide [1] in practice? This is what powers JupyterLite [2], which is a fully fledged Jupyter IDE with support for packages, in browser.
This is one of those things that's "just cool". Would have blown my mind to see it 10 years ago.
1: https://github.com/pyodide/pyodide
2: https://github.com/jupyterlite/jupyterlite