Pyrefly is not the first Python type-checking tool from Meta. Previously, the company delivered Pyre, written in OCaml. Pyre has since been retired; Pyrefly, written from scratch in Rust, replaces it.

Ask about past work. Look at the apps or websites they’ve built. If they’ve handled something like yours before, they’ll be ...

Python has been the language of data science since before machine learning was trendy, and now you can use it for building AI ...