Simon Willison’s Weblog

Pampy: Pattern Matching for Python (via) Ingenious implementation of Erlang/Rust style pattern matching in just 150 lines of extremely cleanly designed and well-tested Python.

Posted 17th December 2018 at 7:14 am

Recent articles

OpenAI's new open weight (Apache 2) models are really good - 5th August 2025
ChatGPT agent's user-agent - 4th August 2025
The ChatGPT sharing dialog demonstrates how difficult it is to design privacy preferences - 3rd August 2025

Monthly briefing

Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments.

Pay me to send you less!

Sponsor & subscribe