Simon Willison’s Weblog

Python one-liner of the day. I love the idea of publishing one-liners accompanied by one-line test suites.

Posted 26th April 2008 at 10:24 am

Recent articles

OpenAI DevDay 2025 live blog - 6th October 2025
Embracing the parallel coding agent lifestyle - 5th October 2025
Designing agentic loops - 30th September 2025

python 1191 testing 63

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