In addition to executing code embedded in HTML, it's also possible to add a code editor directly into an HTML page using the py-repl tag so that you can input code and execute it, as shown below.

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. The front-end objects are ...

Flask hit its milestone 1.0 release in 2018, with Python 2.6 and Python 3.3 being the minimum supported versions, and with many of its behaviors finally set in stone.