Are you saying the only quick way to iterate is unit testing? My point is that there's a whole class of things that require unit testing in Python that are just automatically caught in Rust.

If you don't know Rust well, it's going to be slow going. If you've internalized the way it works, it can be very fast to iterate. Especially when you learn to start structuring types in such a way that bad states aren't even representable. You can often make it impossible to construct inputs that would require debugging in Python.

> From that statement, I'm not convinced you know Python nor Rust.

Thanks for the personal attack. I use both Rust and Python regularly at work, and write tests for both. Working on the Rust code base is pretty much always faster, because so many things are caught in advance. Yes, unit tests are still needed, but not for as many things. Learning to use the type system to your advantage, instead of treating it as an obstacle, can really speed things up.