Simon Willison’s Weblog

How to Use Static Type Checking in Python 3.6 (via) Useful introduction to optional static typing in Python 3.6, including how to use mypy, PyCharm and the Atom mypy plugin.

Posted 19th April 2018 at 6:30 pm

Recent articles

Claude Opus 4.5, and why evaluating new LLMs is increasingly difficult - 24th November 2025
sqlite-utils 4.0a1 has several (minor) backwards incompatible changes - 24th November 2025
Olmo 3 is a fully open LLM - 22nd November 2025

python 1206 static-typing 7 mypy 10

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