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Notice: While JavaScript is not essential for this website, your interaction with the content will be limited. Please turn JavaScript on for the full experience. Release Date: Oct. 24, 2022 This is the stable release of Python 3.11.0 Python 3.11.0 is the newest major release of the Python programming language, and it contains many new features and optimizations. Major new features of the 3.11 seri

Notice: While JavaScript is not essential for this website, your interaction with the content will be limited. Please turn JavaScript on for the full experience. Release Date: April 4, 2021 This is the fourth maintenance release of Python 3.9 Note: The release you're looking at is Python 3.9.4, a bugfix release for the legacy 3.9 series. Python 3.11 is now the latest feature release series of Pyth

PEP 634 – Structural Pattern Matching: Specification Author: Brandt Bucher <brandt at python.org>, Guido van Rossum <guido at python.org> BDFL-Delegate: Discussions-To: Python-Dev list Status: Final Type: Standards Track Created: 12-Sep-2020 Python-Version: 3.10 Post-History: 22-Oct-2020, 08-Feb-2021 Replaces: 622 Resolution: Python-Committers message Table of Contents Abstract Syntax and Semantic

PEP 638 – Syntactic Macros Author: Mark Shannon <mark at hotpy.org> Discussions-To: Python-Dev thread Status: Draft Type: Standards Track Created: 24-Sep-2020 Post-History: 26-Sep-2020 Table of Contents Abstract Motivation Improving the expressiveness of libraries for specific domains Trialing new language features Long term stability for the bytecode interpreter Rationale Specification Syntax Lex

Notice: While JavaScript is not essential for this website, your interaction with the content will be limited. Please turn JavaScript on for the full experience. Release Date: Oct. 5, 2020 This is the stable release of Python 3.9.0 Note: The release you're looking at is Python 3.9.0, a legacy release. Python 3.11 is now the latest feature release series of Python 3. Get the latest release of 3.11.

PEP 585 – Type Hinting Generics In Standard Collections Author: Łukasz Langa <lukasz at python.org> Discussions-To: Typing-SIG list Status: Final Type: Standards Track Topic: Typing Created: 03-Mar-2019 Python-Version: 3.9 Resolution: Python-Dev thread Table of Contents Abstract Rationale and Goals Terminology Backwards compatibility Implementation Parameters to generics are available at runtime F

PEP 622 – Structural Pattern Matching Author: Brandt Bucher <brandt at python.org>, Daniel F Moisset <dfmoisset at gmail.com>, Tobias Kohn <kohnt at tobiaskohn.ch>, Ivan Levkivskyi <levkivskyi at gmail.com>, Guido van Rossum <guido at python.org>, Talin <viridia at gmail.com> BDFL-Delegate: Discussions-To: Python-Dev list Status: Superseded Type: Standards Track Created: 23-Jun-2020 Python-Version

PEP 617 – New PEG parser for CPython Author: Guido van Rossum <guido at python.org>, Pablo Galindo <pablogsal at python.org>, Lysandros Nikolaou <lisandrosnik at gmail.com> Discussions-To: Python-Dev list Status: Final Type: Standards Track Created: 24-Mar-2020 Python-Version: 3.9 Post-History: 02-Apr-2020 Table of Contents Overview Background on LL(1) parsers Background on PEG parsers Rationale S

Notice: While JavaScript is not essential for this website, your interaction with the content will be limited. Please turn JavaScript on for the full experience. Release Date: Oct. 14, 2019 This is the stable release of Python 3.8.0 Note: The release you're looking at is Python 3.8.0, an outdated release. Python 3.11 is now the latest feature release series of Python 3. Get the latest release of 3

Notice: While JavaScript is not essential for this website, your interaction with the content will be limited. Please turn JavaScript on for the full experience. We are volunteers who make and take care of the Python programming language. We have decided that January 1, 2020, was the day that we sunset Python 2. That means that we will not improve it anymore after that day, even if someone finds a

PEP 594 – Removing dead batteries from the standard library Author: Christian Heimes <christian at python.org>, Brett Cannon <brett at python.org> Discussions-To: Discourse thread Status: Final Type: Standards Track Created: 20-May-2019 Python-Version: 3.11 Post-History: 21-May-2019, 04-Feb-2022 Resolution: Discourse message Table of Contents Abstract Rationale Deprecation schedule 3.11 3.12 3.13

PEP 582 – Python local packages directory Author: Kushal Das <mail at kushaldas.in>, Steve Dower <steve.dower at python.org>, Donald Stufft <donald at stufft.io>, Alyssa Coghlan <ncoghlan at gmail.com> Discussions-To: Discourse thread Status: Rejected Type: Standards Track Topic: Packaging Created: 16-May-2018 Python-Version: 3.12 Post-History: 01-Mar-2019 Resolution: Discourse message Table of Co

PEP 517 – A build-system independent format for source trees Author: Nathaniel J. Smith <njs at pobox.com>, Thomas Kluyver <thomas at kluyver.me.uk> BDFL-Delegate: Alyssa Coghlan <ncoghlan at gmail.com> Discussions-To: Distutils-SIG list Status: Final Type: Standards Track Topic: Packaging Created: 30-Sep-2015 Post-History: 01-Oct-2015, 25-Oct-2015, 19-May-2017, 11-Sep-2017 Resolution: Distutils-S

PEP 518 – Specifying Minimum Build System Requirements for Python Projects Author: Brett Cannon <brett at python.org>, Nathaniel J. Smith <njs at pobox.com>, Donald Stufft <donald at stufft.io> BDFL-Delegate: Alyssa Coghlan Discussions-To: Distutils-SIG list Status: Final Type: Standards Track Topic: Packaging Created: 10-May-2016 Post-History: 10-May-2016, 11-May-2016, 13-May-2016 Resolution: Dis

Release Date: June 27, 2018 Note: The release you are looking at is Python 3.7.0, the initial feature release for the legacy 3.7 series which has now reached end-of-life and is no longer supported. See the downloads page for currently supported versions of Python. The final source-only security fix release for 3.7 was 3.7.17. Among the major new features in Python 3.7 are: PEP 539, new C API for t

PEP 553 – Built-in breakpoint() Author: Barry Warsaw <barry at python.org> Status: Final Type: Standards Track Created: 05-Sep-2017 Python-Version: 3.7 Post-History: 05-Sep-2017, 07-Sep-2017, 13-Sep-2017 Resolution: Python-Dev message Table of Contents Abstract Rationale Proposal Environment variable Implementation Rejected alternatives A new keyword sys.breakpoint() Version History References Cop

PEP 572 – Assignment Expressions Author: Chris Angelico <rosuav at gmail.com>, Tim Peters <tim.peters at gmail.com>, Guido van Rossum <guido at python.org> Status: Final Type: Standards Track Created: 28-Feb-2018 Python-Version: 3.8 Post-History: 28-Feb-2018, 02-Mar-2018, 23-Mar-2018, 04-Apr-2018, 17-Apr-2018, 25-Apr-2018, 09-Jul-2018, 05-Aug-2019 Resolution: Python-Dev message Table of Contents A

PEP 563 – Postponed Evaluation of Annotations Author: Łukasz Langa <lukasz at python.org> Discussions-To: Python-Dev list Status: Accepted Type: Standards Track Topic: Typing Created: 08-Sep-2017 Python-Version: 3.7 Post-History: 01-Nov-2017, 21-Nov-2017 Superseded-By: 649 Resolution: Python-Dev message Table of Contents Abstract Rationale and Goals Non-goals Non-typing usage of annotations Implem

PEP 557 – Data Classes Author: Eric V. Smith <eric at trueblade.com> Status: Final Type: Standards Track Created: 02-Jun-2017 Python-Version: 3.7 Post-History: 08-Sep-2017, 25-Nov-2017, 30-Nov-2017, 01-Dec-2017, 02-Dec-2017, 06-Jan-2018, 04-Mar-2018 Resolution: Python-Dev message Table of Contents Notice for Reviewers Abstract Rationale Specification Field objects post-init processing Class variab

PEP 543 – A Unified TLS API for Python Author: Cory Benfield <cory at lukasa.co.uk>, Christian Heimes <christian at python.org> Status: Withdrawn Type: Standards Track Created: 17-Oct-2016 Python-Version: 3.7 Post-History: 11-Jan-2017, 19-Jan-2017, 02-Feb-2017, 09-Feb-2017 Table of Contents Abstract Resolution Rationale Problems Proposal Interfaces Configuration Context Buffer Socket Cipher Suites

PEP 544 – Protocols: Structural subtyping (static duck typing) Author: Ivan Levkivskyi <levkivskyi at gmail.com>, Jukka Lehtosalo <jukka.lehtosalo at iki.fi>, Łukasz Langa <lukasz at python.org> BDFL-Delegate: Guido van Rossum <guido at python.org> Discussions-To: Python-Dev list Status: Final Type: Standards Track Topic: Typing Created: 05-Mar-2017 Python-Version: 3.8 Resolution: Typing-SIG messa

Release Date: Dec. 23, 2016 Note: The release you are looking at is Python 3.6.0, the initial feature release for the legacy 3.6 series which has now reached end-of-life and is no longer supported. See the downloads page for currently supported versions of Python. The final source-only security fix release for 3.6 was 3.6.15 and the final bugfix release was 3.6.8. Among the new major new features

pypi.org python.org us.pycon.org Python Software Foundation Code of Conduct The Python community is made up of members from around the globe with a diverse set of skills, personalities, and experiences. It is through these differences that our community experiences great successes and continued growth. When you're working with members of the community, this Code of Conduct will help steer your int

PEP 526 – Syntax for Variable Annotations Author: Ryan Gonzalez <rymg19 at gmail.com>, Philip House <phouse512 at gmail.com>, Ivan Levkivskyi <levkivskyi at gmail.com>, Lisa Roach <lisaroach14 at gmail.com>, Guido van Rossum <guido at python.org> Status: Final Type: Standards Track Topic: Typing Created: 09-Aug-2016 Python-Version: 3.6 Post-History: 30-Aug-2016, 02-Sep-2016 Resolution: Python-Dev

PEP 440 – Version Identification and Dependency Specification Author: Alyssa Coghlan <ncoghlan at gmail.com>, Donald Stufft <donald at stufft.io> BDFL-Delegate: Alyssa Coghlan <ncoghlan at gmail.com> Discussions-To: Distutils-SIG list Status: Final Type: Standards Track Topic: Packaging Created: 18-Mar-2013 Post-History: 30-Mar-2013, 27-May-2013, 20-Jun-2013, 21-Dec-2013, 28-Jan-2014, 08-Aug-2014,

PEP 515 – Underscores in Numeric Literals Author: Georg Brandl, Serhiy Storchaka Status: Final Type: Standards Track Created: 10-Feb-2016 Python-Version: 3.6 Post-History: 10-Feb-2016, 11-Feb-2016 Table of Contents Abstract and Rationale Specification Literal Grammar Constructors Further changes Prior Art Alternative Syntax Underscore Placement Rules Different Separators Implementation References