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PEP 484 – Type Hints 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-De

PEP 492 – Coroutines with async and await syntax Author: Yury Selivanov <yury at edgedb.com> Discussions-To: Python-Dev list Status: Final Type: Standards Track Created: 09-Apr-2015 Python-Version: 3.5 Post-History: 17-Apr-2015, 21-Apr-2015, 27-Apr-2015, 29-Apr-2015, 05-May-2015 Table of Contents Abstract API Design and Implementation Revisions Rationale and Goals Specification New Coroutine Decla

PEP 448 – Additional Unpacking Generalizations Author: Joshua Landau <joshua at landau.ws> Discussions-To: Python-Ideas list Status: Final Type: Standards Track Created: 29-Jun-2013 Python-Version: 3.5 Post-History: Table of Contents Abstract Rationale Specification Disadvantages Variations Approval Implementation References Copyright Abstract This PEP proposes extended usages of the * iterable un

PEP 441 – Improving Python ZIP Application Support Author: Daniel Holth <dholth at gmail.com>, Paul Moore <p.f.moore at gmail.com> Discussions-To: Python-Dev message Status: Final Type: Standards Track Created: 30-Mar-2013 Python-Version: 3.5 Post-History: 30-Mar-2013, 01-Apr-2013, 16-Feb-2015 Resolution: Python-Dev message Table of Contents Improving Python ZIP Application Support A New Python ZI

Release Date: Dec. 10, 2014 Python 2.7.9 is a bugfix version for the Python 2.7 release series. Python 2.7.9 includes several significant changes unprecedented in a "bugfix" release: The entirety of Python 3.4's ssl module has been backported for Python 2.7.9. See PEP 466 for justification. HTTPS certificate validation using the system's certificate store is now enabled by default. See PEP 476 for

PEP 442 – Safe object finalization Author: Antoine Pitrou <solipsis at pitrou.net> BDFL-Delegate: Benjamin Peterson <benjamin at python.org> Status: Final Type: Standards Track Created: 18-May-2013 Python-Version: 3.4 Post-History: 18-May-2013 Resolution: Python-Dev message Table of Contents Abstract Definitions Impact Benefits Description Reference-counted disposal Disposal of cyclic isolates C-l

Python 3.4 has reached end-of-life. Python 3.4.10, the final release of the 3.4 series, is available here. Python 3.4.0 was released on March 16th, 2014. Major new features of the 3.4 series, compared to 3.3 Python 3.4 includes a range of improvements of the 3.x series, including hundreds of small improvements and bug fixes. Among the new major new features and changes in the 3.4 release series ar

PEP 443 – Single-dispatch generic functions Author: Łukasz Langa <lukasz at python.org> Discussions-To: Python-Dev list Status: Final Type: Standards Track Created: 22-May-2013 Python-Version: 3.4 Post-History: 22-May-2013, 25-May-2013, 31-May-2013 Replaces: 245, 246, 3124 Table of Contents Abstract Rationale and Goals User API Implementation Notes Abstract Base Classes Usage Patterns Alternative

Release Date: April 6, 2013 Note: A newer bugfix release, 2.7.5, is currently available. Its use is recommended over previous versions of 2.7. Python 2.7.4 was released on April 6, 2013. This is a 2.7 series bugfix release. It includes hundreds of bugfixes over 2.7.3. About the 2.7 release series Among the features and improvements to Python 2.6 introduced in the 2.7 series are An ordered dictiona

PEP 3156 – Asynchronous IO Support Rebooted: the "asyncio" Module Author: Guido van Rossum <guido at python.org> BDFL-Delegate: Antoine Pitrou <antoine at python.org> Discussions-To: python-tulip@googlegroups.com Status: Final Type: Standards Track Created: 12-Dec-2012 Python-Version: 3.3 Post-History: 21-Dec-2012 Replaces: 3153 Resolution: Python-Dev message Table of Contents Abstract Introductio

PEP 393 – Flexible String Representation Author: Martin von Löwis <martin at v.loewis.de> Status: Final Type: Standards Track Created: 24-Jan-2010 Python-Version: 3.3 Post-History: Table of Contents Abstract Rationale Specification String Creation String Access New API Stable ABI GDB Debugging Hooks Deprecations, Removals, and Incompatibilities Discussion Performance Porting Guidelines References

Python 3.3.0 was released on September 29th, 2012. Python 3.3 includes a range of improvements of the 3.x series, as well as easier porting between 2.x and 3.x. Major new features in the 3.3 release series are: PEP 380, syntax for delegating to a subgenerator (yield from) PEP 393, flexible string representation (doing away with the distinction between "wide" and "narrow" Unicode builds) A C implem

PEP 427 – The Wheel Binary Package Format 1.0 Author: Daniel Holth <dholth at gmail.com> BDFL-Delegate: Alyssa Coghlan <ncoghlan at gmail.com> Discussions-To: Distutils-SIG list Status: Final Type: Standards Track Topic: Packaging Created: 20-Sep-2012 Post-History: 18-Oct-2012, 15-Feb-2013 Resolution: Python-Dev message Table of Contents Abstract PEP Acceptance Rationale Details Installing a wheel

PEP 405 – Python Virtual Environments Author: Carl Meyer <carl at oddbird.net> BDFL-Delegate: Alyssa Coghlan Status: Final Type: Standards Track Topic: Packaging Created: 13-Jun-2011 Python-Version: 3.3 Post-History: 24-Oct-2011, 28-Oct-2011, 06-Mar-2012, 24-May-2012 Resolution: Python-Dev message Table of Contents Abstract Motivation Specification Isolation from system site-packages Creating virt

PEP 420 – Implicit Namespace Packages Author: Eric V. Smith <eric at trueblade.com> Status: Final Type: Standards Track Created: 19-Apr-2012 Python-Version: 3.3 Post-History: Resolution: Python-Dev message Table of Contents Abstract Terminology Namespace packages today Rationale Specification Dynamic path computation Impact on import finders and loaders Differences between namespace packages and r

PSF>>> Trademark Policy In case you have questions regarding our trademark policy, please check our PSF Trademark FAQ or contact the PSF Trademarks Committee for help. Introduction This document outlines the policy of the Python Software Foundation ("PSF") regarding the use of its trademarks. Any use of any PSF trademark must be in accordance with this policy. "Python" is a registered trademark of

Release Date: Sept. 29, 2012 Python 3.3 includes a range of improvements of the 3.x series, as well as easier porting between 2.x and 3.x. Major new features in the 3.3 release series are: PEP 380, syntax for delegating to a subgenerator (yield from) PEP 393, flexible string representation (doing away with the distinction between "wide" and "narrow" Unicode builds) A C implementation of the "decim

PEP 414 – Explicit Unicode Literal for Python 3.3 Author: Armin Ronacher <armin.ronacher at active-4.com>, Alyssa Coghlan <ncoghlan at gmail.com> Status: Final Type: Standards Track Created: 15-Feb-2012 Python-Version: 3.3 Post-History: 28-Feb-2012, 04-Mar-2012 Resolution: Python-Dev message Table of Contents Abstract BDFL Pronouncement Proposal Exclusion of "Raw" Unicode Literals Author’s Note Ra

PEP 394 – The "python" Command on Unix-Like Systems Author: Kerrick Staley <mail at kerrickstaley.com>, Alyssa Coghlan <ncoghlan at gmail.com>, Barry Warsaw <barry at python.org>, Petr Viktorin <encukou at gmail.com>, Miro Hrončok <miro at hroncok.cz>, Carol Willing <willingc at gmail.com> Status: Active Type: Informational Created: 02-Mar-2011 Post-History: 04-Mar-2011, 20-Jul-2011, 16-Feb-2012,

Release Date: June 11, 2011 Note: A newer bugfix release, 2.7.3, is currently available. Its use is recommended over Python 2.7.2. Python 2.7.2 was released on June 11th, 2011. The Python 2.7 series is scheduled to be the last major version in the 2.x series before 2.x moves into an extended maintenance period. The 2.7 series contains many of the features that were first released in Python 3.1. Im

PEP 380 – Syntax for Delegating to a Subgenerator Author: Gregory Ewing <greg.ewing at canterbury.ac.nz> Status: Final Type: Standards Track Created: 13-Feb-2009 Python-Version: 3.3 Post-History: Resolution: Python-Dev message Table of Contents Abstract PEP Acceptance Motivation Proposal Enhancements to StopIteration Formal Semantics Rationale The Refactoring Principle Finalization Generators as T

PEP 404 – Python 2.8 Un-release Schedule Author: Barry Warsaw <barry at python.org> Status: Final Type: Informational Topic: Release Created: 09-Nov-2011 Python-Version: 2.8 Table of Contents Abstract Un-release Manager and Crew Un-release Schedule Official pronouncement Upgrade path And Now For Something Completely Different Strings and bytes Numbers Classes Multiple spellings Imports Iterators a

Here is a spurious collection of semi to totally unserious stuff, mostly postings found wafting gently in the comp.lang.python newsgroup (a.k.a. the python-list mailing list). See also Andrew Kuchling's collection of Python quotations, containing in a condensed form some sterling examples of the wit and wisdom encountered in the Python world.

3.14 pre-release 2025年10月07日 (planned) 2030-10 PEP 745 3.13 bugfix 2024年10月07日 2029-10 PEP 719 3.12 security 2023年10月02日 2028-10 PEP 693 3.11 security 2022年10月24日 2027-10 PEP 664 3.10 security 2021年10月04日 2026-10 PEP 619 3.9 security 2020年10月05日 2025-10 PEP 596 3.8 end of life, last release was 3.8.20 2019年10月14日 2024年10月07日 PEP 569 Python 3.13.7 Aug. 14, 2025 Download Release Notes Python 3.13.6 Aug. 6,

PEP 386 – Changing the version comparison module in Distutils Author: Tarek Ziadé <tarek at ziade.org> Status: Superseded Type: Standards Track Topic: Packaging Created: 04-Jun-2009 Superseded-By: 440 Table of Contents Abstract Motivation Requisites and current status Distutils Setuptools Caveats of existing systems The new versioning algorithm NormalizedVersion suggest_normalized_version Roadmap

PEP 383 – Non-decodable Bytes in System Character Interfaces Author: Martin von Löwis <martin at v.loewis.de> Status: Final Type: Standards Track Created: 22-Apr-2009 Python-Version: 3.1 Post-History: Table of Contents Abstract Rationale Specification Discussion References Copyright Abstract File names, environment variables, and command line arguments are defined as being character data in POSIX;

PEP 398 – Python 3.3 Release Schedule Author: Georg Brandl <georg at python.org> Status: Final Type: Informational Topic: Release Created: 23-Mar-2011 Python-Version: 3.3 Table of Contents Abstract Release Manager and Crew 3.3 Lifespan Release Schedule 3.3.0 schedule 3.3.1 schedule 3.3.2 schedule 3.3.3 schedule 3.3.4 schedule 3.3.5 schedule 3.3.6 schedule 3.3.7 schedule 3.3.x end-of-life Features