I'm the author of Rich, a Python library for fancy formatting in the terminal. Textual is a framework I'm building around Rich for creating terminal applications. It's powered by async and borrows a number of techniques from web development.

It's still in active development, but it has reached a point where you can play with it. The most recent release adds a tree control which you can use to navigate a directory and pick files.

My hope is that a Textual UI will be at-least as easy to write as a command line interface, and projects will grow a --tui switch to launch an interactive app.

There's already an app using Textual: [wtpython](https://github.com/what-the-python/wtpython)