With the Web Audio API, Socket.IO, and Python, you can visualize your music really easily.

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.

This can be handled by a Python script, or more intuitively via a browser-based front-end. This uses WebUSB in order to take input from the browser and then send data out over the USB-serial ...

A new project from Anaconda delivers the Python runtime in a web page, via a single JS include, and with access to many popular Python packages.

In the December update to Python in Visual Studio Code, developers can experiment with a new preview feature that lets them run and debug Python code in the browser.