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Python » PEP Index » PEP 703 Toggle light / dark / auto colour theme Author : Sam Gross <colesbury at gmail.com> Sponsor : Łukasz Langa <lukasz at python.org> Discussions-To : Discourse thread Status : Draft Type : Standards Track Created : 09-Jan-2023 Python-Version : 3.13 Post-History : 09-Jan-2023 , 04-May-2023 Resolution : Table of Contents Abstract Motivation The GIL Makes Many Types of Parallelism Difficult to Express The GIL Affects Python Library Usability GPU-Heavy Workloads Require Multi-Core Processing The GIL Makes Deploying Python AI Models Difficult Motivation Summary Specification Build Configuration Changes Overview of CPython Changes Reference Counting Immortalization Biased Reference Counting Default ( 0b00 ) Weakrefs ( 0b01 ) Queued ( 0b10 ) Merged ( 0b11 ) Reference counting pseudo-code Deferred ...

Python » PEP Index » PEP 484 Toggle light / dark / auto colour theme Author : Guido van Rossum <guido at python.org>, Jukka Lehtosalo <jukka.lehtosalo at iki.fi>, Łukasz Langa <lukasz at python.org> BDFL-Delegate : Mark Shannon Discussions-To : Python-Dev list Status : Final Type : Standards Track Topic : Typing Created : 29-Sep-2014 Python-Version : 3.5 Post-History : 16-Jan-2015, 20-Mar-2015, 17-Apr-2015, 20-May-2015, 22-May-2015 Resolution : Python-Dev message Table of Contents Abstract Rationale and Goals Non-goals The meaning of annotations Type Definition Syntax Acceptable type hints Using None Type aliases Callable Generics User-defined generic types Scoping rules for type variables Instantiating generic classes and type erasure Arbitrary generic types as base classes Abstract generic types Type variables wi...

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