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.

Microsoft has updated the Python extension for its Visual Studio Code integrated development environment (IDE) to introduce support for editing in the web browser, thanks to the new Python ...

Save that text to a file, open it in a browser and it runs. Well, of course, no server set-up for you. Presumably, the work is being done on the pyscript.net server which takes a lot of set-up!

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.