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.

The developers behind Cython, the Python library for compiling Python code to C, have at last released Cython 3.0 after many years of development and refinement.. The main goal behind Cython is to ...