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 ...

Launch your Web script/HTML editor application. You can use Notepad to create your scripts if you are comfortable with Web scripting and HTML coding.

Get Coding! Learn HTML, CSS, and JavaScript and Build a Website, App, and Game Young Rewired State. Candlewick, $12.99 trade paper (208p) ISBN 978-0-7636-9276-6.