Simon Willison’s Weblog

19th July 2008 - Link Blog

Simple Top-Down Parsing in Python. Eye-opening tutorial on building a recursive descent parser for Python, in Python that uses top-down operator precedence.

Posted 19th July 2008 at 11:37 pm

Recent articles

Notes on the xAI/Anthropic data center deal - 7th May 2026
Live blog: Code w/ Claude 2026 - 6th May 2026
Vibe coding and agentic engineering are getting closer than I'd like - 6th May 2026

This is a link post by Simon Willison, posted on 19th July 2008.

compilers 17 effbot 4 fredrik-lundh 7 parsing 12 python 1250 recursivedescent 1

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