The new PyScript project lets you embed Python programs directly in HTML pages and execute them within the browser without any server-based requirements.

Note that you cannot use web workers on an HTML file loaded locally; you must load it from a web server that provides certain headers. PyScript’s documentation explains how this works in detail.

We’ll look at three Python web frameworks that follow this paradigm, allowing you to describe front-end code (HTML, CSS, and JavaScript) using back-end Python code.