Python 3.15: Exploring the New Features

Python 3.15 is (almost*) here! Christopher Trudeau and Bartosz Zaczyński return to discuss the new version. Bartosz coordinated the series of preview articles with members of the Real Python team and wrote the showcase tutorial, “Python 3.15: Cool New Features for You to Try.” Christopher’s video course “What’s New in Python 3.15” covers the topics from the article and shows the new features in action. Christopher and Bartosz dug into the release to create code examples of the new features for the tutorial and course. We cover the new built-in types, unpacking in comprehensions, and developer experience enhancements. We also look into the performance improvements, including lazy imports, the upgraded JIT compiler, and a new sampling profiler. 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 3.15. Course Spotlight: What’s New in Python 3.15 Explore the new features in Python 3.15, including lazy imports, frozendict, sentinel values, a sampling profiler, and a faster JIT. Topics: 00:00:00 – Introduction 00:00:02 – * NOTE: Python 3.15 release delayed! 00:03:35 – Real Python 3.15 Preview Articles and Video Course 00:04:40 – Sentinel Values 00:08:55 – Lazy Imports 00:14:48 – Unpacking in Comprehensions 00:17:12 – Mathematical functions 00:20:07 – Sampling Profiler 00:27:43 – Video Course Spotlight 00:29:18 – frozendict 00:33:12 – The speed round of features 00:36:04 – Continued work on free-threaded Python and upgrading the JIT 00:39:34 – Upgrading to 3.15 00:44:35 – Thanks and goodbye Show Links: * Python 3.15: following tradition, let’s have a surprise rc3! - Core Development - Discussions on Python.org Python 3.15: Cool New Features for You to Try – Real Python Python 3.15 Preview: Sentinel Values – Real Python Python 3.15 Preview: Lazy Imports – Real Python Unpacking in Comprehensions -What’s new in Python 3.15 — Python 3.15 documentation math — Mathematical functions — Python 3.15 documentation Python 3.15 Preview: Sampling Profiler PEP 799 – A dedicated profiling package for organizing Python profiling tools Python 3.15 Preview: frozendict PEP 814 – Add frozendict built-in type More color - What’s new in Python 3.15 Improved error messages - What’s new in Python 3.15 Python 3.15 Preview: UTF-8 by Default PEP 803: Stable ABI for free-threaded builds - What’s new in Python 3.15 Python 3.15 Preview: Upgraded JIT Compiler Additional Links: PEP 810 – Explicit lazy imports Implement native PEP 0810 lazy loading by hebaalazzeh - google-cloud-python PEP 798 – Unpacking in Comprehensions PEP 448 – Additional Unpacking Generalizations Tachyon: Python 3.15’s sampling profiler is faster…- Pablo Galindo Salgado, Laszlo Kiss Kollar - YouTube The amazing and varied life of Tachyon particles in Star Trek TNG - YouTube Episode #128: Using a Memory Profiler in Python & What It Can Teach You Episode #172: Measuring Multiple Facets of Python Performance With Scalene Upgraded experimental JIT compiler - What’s new in Python 3.15 What’s new in Python 3.15 — Python 3.15 documentation Level up your Python skills with our expert-led courses: Understanding Python List Comprehensions What's New in Python 3.14 What's New in Python 3.15 Support the podcast & join our community of Pythonistas