Python 3.14's best new features

Published: 07 October 2025
on channel: Python Morsels

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This is my version of "What's new in Python 3.14", with a focus on the features that are immediately relevant for most Python developers.

Python 3.13 comes with a brand new REPL and improvements to virtual environments and the Python debugger.

Article version of this video available at https://pym.dev/python314

Download Python 3.14 from https://www.python.org/downloads/rele...

00:00 Important but not discussed: JIT, Free-Threading, and Optimizations
00:17 Syntax highlighting in the REPL and PDB
00:43 Color in unittest output
00:56 Color in argparse help text
01:06 My tiny contribution: python -m json
01:22 Beginner-friendly error messages
01:47 Tab completion for import statements
02:13 argparse suggests typo corrections
02:31 Now `pathlib` has `copy` and `move` methods!
03:04 Easier date and time parsing with `datetime`
03:34 Support for `uuid7`: UUIDs sortable by creation time
04:00 Cleaner multi-exception catching
04:22 Concurrent sub-interpreters
04:41 asyncio introspection & external debugger interface
04:58 t-strings
05:41 go install Python 3.14!

#python

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