Pyodide: Bringing the scientific Python stack to the browser

Pyodide is an experimental project from Mozilla to create a full Python data science stack that runs entirely in the browser. Projects like Brython and Skulpt are rewrites of the standard Python interpreter to JavaScript, therefore, they can run strings of Python code directly in the browser. Pyodide is put together by:

If you were to just take this WebAssembly and load it in the browser, things would look very different to the Python interpreter than they do when running directly on top of your operating system.

Source: hacks.mozilla.org