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Pyrefly

@pyrefly.org

Just a fast type checker and language server for Python, written in Rust. pyrefly.org

Pyrefly @pyrefly.org · 03/10/2026

🐍 We're at @pybay.bsky.social! Come find the Meta booth and say hi 👋 Our team is here to talk about: 🔥 Pyrefly, 🧵 Free-threaded Python, 🛟 Safer Lazy Imports, and More! Can't make it? Find us on GitHub: github.com/facebook/pyrefly #PyBay2026 #Python #OpenSource #Pyrefly #FreeThreading

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Pyrefly @pyrefly.org · 18/09/2026

Turns out we're not the only Pyrefly 😯 While in Brisbane for a PyCon AU, we found out the heavy metal band @pyreflyband.bsky.social was playing there the same weekend. Obviously we had to go and exchange swag!

Pyrefly (type checker) and Pyrefly (band) pose together

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