#355 Python 3.12 is Out!

Topics covered in this episode:

• 3.12 is out!
• Trouble with virtualenv caching, a tale of 3.12 update
• Python Developers Survey 2022 Results
• Scientific Python Library Development Guide
• Extras
• Joke

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About the show

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• Michael: @mkennedy@fosstodon.org
• Brian: @brianokken@fosstodon.org
• Show: @pythonbytes@fosstodon.org

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Michael #1: 3.12 is out!

• What’s new
  • PEP 695, type parameter syntax and the type statement
  • PEP 692, using TypedDict to annotate **kwargs
  • PEP 698, typing.override() decorator
  • PEP 701, f-strings in the grammar
  • PEP 684, a unique per-interpreter GIL
  • PEP 669, low impact monitoring
  • Improved ‘Did you mean …’ suggestions for NameError, ImportError, and SyntaxError exceptions
  • PEP 688, using the buffer protocol from Python
  • The pathlib.Path class now supports subclassing
  • The os module received several improvements for Windows support
  • A command-line interface has been added to the sqlite3 module
  • isinstance() checks against runtime-checkable protocols enjoy a speed up of between two and 20 times
  • The asyncio package has had a number of performance improvements, with some benchmarks showing a 75% speed up.
  • A command-line interface has been added to the uuid module
  • Due to the changes in PEP 701, producing tokens via the tokenize module is up to up to 64% faster.
  • PEP 683, immortal objects
  • PEP 709, comprehension inlining

Brian #2: Trouble with virtualenv caching, a tale of 3.12 update

Michael #3: Python Developers Survey 2022 Results

• I did a “first reactions” video too

Brian #4:Scientific Python Library Development Guide

• Announcement and Overview by Henry Schreiner

Extras

Brian:

• The Complete pytest Course is now at courses.pythontest.com
  • Still on Teachable, just with a custom domain
  • Also, just released Chapter 8 today.

Michael:

• Moving to Mona App (was using Ivory) for Mastodon
• Making bank on .ai
• Vivaldi on iOS

Joke: Thought it would be easy