Topics covered in this episode:

Python 3.14
Free-threaded Python Library Compatibility Checker
Claude Sonnet 4.5
Python 3.15 will get Explicit lazy imports
Extras
Joke

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About the show

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Brian #1: Python 3.14

Released on Oct 7
What’s new in Python 3.14
Just a few of the changes
- PEP 750: Template string literals
- PEP 758: Allow except and except* expressions without brackets
- Improved error messages
- Default interactive shell now
  - highlights Python syntax
  - supports auto-completion
- argparse
  - better support for python -m module
  - has a new suggest_on_error parameter for “maybe you meant …” support
- python -m calendar now highlights today’s date
Plus so much more

Michael #2: Free-threaded Python Library Compatibility Checker

by Donghee Na
App checks compatibility of top PyPI libraries with CPython 3.13t and 3.14t, helping developers understand how the Python ecosystem adapts to upcoming Python versions.
It’s still pretty red, let’s get in the game everyone!

Michael #3: Claude Sonnet 4.5

Top programming model (even above Opus 4.1)
Shows large improvements in reducing concerning behaviors like sycophancy, deception, power-seeking, and the tendency to encourage delusional thinking
Anthropic is releasing the Claude Agent SDK, the same infrastructure that powers Claude Code, making it available for developers to build their own agents, along with major upgrades including checkpoints, a VS Code extension, and new context editing features
And Claude Sonnet 4.5 is available in PyCharm too.

Brian #4: Python 3.15 will get Explicit lazy imports

Discussion on discuss.python.org
This PEP introduces syntax for lazy imports as an explicit language feature:
```
lazy import json
lazy from json import dumps
```
BTW, lazy loading in fixtures is a super easy way to speed up test startup times.

Extras

Brian:

Music video made in Python - from Patrick of the band “Friends in Real Life”
- source code: https://gitlab.com/low-capacity-music/r9-legends/

Michael:

New article: Thanks AI
Lots of updates for content-types
Dramatically improved search on Python Bytes (example: https://pythonbytes.fm/search?q=wheel use the filter toggle to see top hits)
Talk Python in Production is out and for sale

Joke: You do estimates?

The Brain Trust answers listener questions (DHP63)