Simon Willison’s Weblog

Python gems of my own (via) Did you know you can pass 128 as a flag to Python’s re.compile() function to spit out a parse tree? I didn’t. re.compile(“pattern”, 128)

Posted 3rd November 2008 at 11:59 am

Recent articles

OpenAI are quietly adopting skills, now available in ChatGPT and Codex CLI - 12th December 2025
GPT-5.2 - 11th December 2025
Useful patterns for building HTML tools - 10th December 2025

eric-holscher 9 python 1212 regex 7

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