Python 3.12 is here! Our regular guests, Geir Arne Hjelle and Christopher Trudeau, return to discuss the new version. Geir Arne coordinated a series of preview articles with several members of the Real Python team this year, and his showcase tutorial, “Python 3.12: Cool New Features for You to Try,” came out on October 2. Christopher’s video course was posted the next day, covering the topics from the article with visual examples of Python 3.12 in action.

Geir Arne and Christopher collaborated to create code examples of the new features. We discuss better error messaging, more intuitive f-strings, subinterpreters, the Linux perf profiler, improved typing syntax, and more.

We dig into the updates and offer advice on incorporating them into your projects. We also consider when you should start running Python 3.12.

Course Spotlight: What’s New in Python 3.12

In this video course, you’ll explore the new features that Python 3.12 brings to the table. These include improved f-strings, better error messages, changes to CPython internals, additions to static typing, and more.

Topics:

00:00:00 – Introduction
00:02:15 – Preview tutorials
00:05:08 – Ever better error messages
00:10:03 – More powerful f-strings
00:15:46 – Comprehension inlining & additional optimizations
00:21:24 – Support for subinterpreters
00:27:55 – Support for the Linux perf profiler
00:32:02 – Immortal objects
00:35:01 – Video Course Spotlight
00:36:03 – Calendar constants for days and months
00:38:48 – New itertools.batched() for grouping Items
00:40:53 – Improved type variable syntax
00:50:51 – New Path.walk() for listing files in subdirectories
00:53:04 – Override decorator for static typing
00:57:36 – Advice on upgrading
01:03:08 – Thanks to the core developer team
01:04:39 – Thanks to the Real Python team and goodbye

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Exploring the New Features of Python 3.12