PyScript lets you run Python scripts right in the browser, side by side with JavaScript, with two-way interaction between your code and the web page.

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

Okay, that's not a very good description of what I am trying to figure out, which is this: I would like to be able to run Python scripts that are part of an installed library. E.g., I would like ...

Python might be the most popular programming language in the world, but unlike other frontrunner JavaScript, you can't run Python code in the browser.