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 Show Links: Python 3.14: Cool New Features for You to Try – Real Python What’s New in Python 3.14 Python 3.14 Preview: REPL Autocompletion and Highlighting – Real Python Python 3.13 Preview: A Modern REPL – Real Python Allow “-m json” instead of “-m json.tool” · Issue #122873 compression.zstd — Compression compatible with the Zstandard format — Python 3.14.0 documentation Python 3.14 Preview: Lazy Annotations – Real Python Python 3.14 Preview: Better Syntax Error Messages – Real Python PEP 765: Control flow in finally b