I originally looked at Urwid for a side project I was working on, but it seemed a bit heavyweight for the kind of prototyping I wanted to do.

I ended up settling on Visidata's vdtui [1]. It's pretty strongly opinionated and there are a lot of batteries included, but on the plus side, you can get a pretty functional tabular CLI app working with very little code, and start focusing on your business logic rather than the scaffolding. I was pretty satisfied with it.

[1] https://github.com/saulpw/visidata/blob/stable/visidata/vdtu...