Simon Willison’s Weblog

Newsletter

Monday, 12th October 2026

My plugin for detecting and listing all Datasette instances on the current machine now works with the latest version, and displays the detected PID as well. Knowing the PID makes it easier to attach the new Python 3.15 profiler.

Hello Python 3.15, goodbye 3.10, and now I can use 3.11

Visit Hello Python 3.15, goodbye 3.10, and now I can use 3.11

Python 3.15 is here! Here’s the essential What’s new in Python 3.15 guide, this year curated by 3.14 and 3.15 release manager Hugo van Kemenade. As someone who builds open source software that works in every supported Python version, I get to say goodbye to Python 3.10 and start embracing features from Python 3.11.

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