Simon Willison’s Weblog

8th January 2022

TIL Writing pytest tests against tools written with argparse — I usually build command-line tools using [Click](https://click.palletsprojects.com/) (and my [click-app](https://github.com/simonw/click-app) cookiecutter template), which includes a really nice [set of tools](https://click.palletsprojects.com/en/8.0.x/testing/) for writing tests.

None

Posted 8th January 2022 at 8:42 pm

Recent articles

Highlights from my conversation about agentic engineering on Lenny's Podcast - 2nd April 2026
Mr. Chatterbox is a (weak) Victorian-era ethically trained model you can run on your own computer - 30th March 2026
Vibe coding SwiftUI apps is a lot of fun - 27th March 2026

This is a beat by Simon Willison, posted on 8th January 2022.

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