I second the FastAPI. But always I choose Django and if you throw HTMX in the mix not even Rails come close to what it can build.

They're still good. The new one is FastAPI which is performant and supports concurrency, schema validation, and a few other modern nicities

And finally with pydantic 2 it's no longer using the slowest library for schema validation that existed!

Still not the fastest, but not the slowest at least.

I still use Django, and I love it, but it can be a bit of a heavyweight framework. I wouldn't call it cumbersome, but I couldn't imagine using it to build a single page web app without a backend for example, it's just a bit overkill.

I'd see this as more like Svelte (or at least the projects I'd usually build with Svelte I might consider this for instead).