Anvil is a platform that hopes to enable the creation of great web apps with nothing but Python code. You can drag and drop your user elements and rely on Anvil to handle your server and database.
He also created Skulpt, which you can check out here. It's decscribed as follows, "Python. Client Side. Skulpt is an entirely in-browser implementation of Python. No preprocessing, plugins, or server-side support required, just write Python and reload.
Want to go deeper? Check out his talk on Full Stack Web Development with nothing but Python here.
You can follow him on Twitter here and Github here.