Proper is a new Python web framework. Not another Flask clone, it's a Ruby-on-Rails clone :P.
More seriously: it isn't a clone, but it is heavily influenced by Rails in the ways that matter: opinionated, generator-heavy, focused on REST and server-rendered HTML, built around a fixed project structure, and packed with batteries for auth, file uploads, etc.
The one thing Proper does very differently: The runtime is ASGI (you need it for performance and WebSockets), but the code you write is synchronous. No async/await confetti scattered across code that doesn't need concurrency.
Full human-shaped docs at properproject.org/docs.
Proper is the Python web framework I built for myself after years in the trade, once I understood that hard conventions do not lock you in — they free you to focus on what's important.
(It also works for the back cover of my future biography by Walter Isaacson).
Code: MIT. Documentation: CC BY-SA 4.0.