Meta Open Source Highlights: Pyrefly and Free Threaded Python

Abstract

Meta is proud to sponsor PyLadiesCon and to share our commitment to supporting the Python ecosystem through impactful open-source initiatives. In this talk, we’ll spotlight two major projects: Pyrefly: a fast, open-source Python type checker and language server written in Rust, designed to catch type-related errors before runtime and provide powerful IDE integration Free Threaded Python: a new addition to CPython (reached supported status earlier this year) that enables users to remove the Global Interpreter Lock (GIL) to enable true parallel execution of Python code across multiple threads, significantly improving multithreading performance. Join us to learn more about these initiatives, how to use them and how to get involved!

Speakers