Python 3.14 is here! Christopher Trudeau returns to discuss the new version with Real Python team member Bartosz Zaczyński. This year, Bartosz coordinated the series of preview articles with members of the Real Python team and wrote the showcase tutorial, “Python 3.14: Cool New Features for You to Try.” Christopher’s video course, “What’s New in Python 3.14”, covers the topics from the article and shows the new features in action.

Christopher and Bartosz dug into the new release to create code examples showcasing the new features for the tutorial and course. We look at the enhanced and more colorful REPL experience, better error messages, safer hooks for live debugging, and deferred annotation evaluation. We also discuss template strings, Zstandard compression, and multiple performance improvements.

We share our thoughts on the updates and offer advice about incorporating them into your projects. We also discuss when you should start running Python 3.14.

Course Spotlight: What’s New in Python 3.14

Covers Python 3.14’s key changes: free-threading, subinterpreters, t-strings, lazy annotations, new REPL features, and improved error messages.

Topics:

00:00:00 – Introduction
00:02:03 – Cool New Features for You to Try - Tutorial
00:02:20 – What’s New in Python 3.14 - Video Course
00:02:54 – Even Friendlier Python REPL
00:05:05 – Allow “json” instead of “json.tool”
00:05:49 – Zstandard compression
00:06:37 – Working With Numbers
00:11:09 – Deferred Evaluation of Annotations
00:17:35 – More Helpful Error Messages
00:20:41 – Warnings in try…finally Blocks
00:22:08 – Safer Live Process Debugging
00:25:22 – Pathlib Improvements
00:26:50 – Additional assert methods for unittest
00:27:19 – Template Strings (T-strings)
00:31:01 – Free-threaded Build Updates
00:35:30 – Incremental Garbage Collector
00:37:59 – functools partial & placeholder improvement
00:40:13 – Video Course Spotlight
00:41:12 – Experimental JIT Builds
00:46:52 – Parallel Subinterpreters
00:48:59 – Unicode Database Update
00:49:47 – 𝜋thon - Easter Egg
00:51:26 – Starting to use the new version
00:55:26 – Thanks and goodbye

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