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  • What is Python? Executive Summary

    ...interpreter and the extensive standard library are available in source or binary form without charge for all major platforms, and can be freely distributed. Often, programmers fall in love with Python because of the increased productivity it provides. Since there is no compilation step, the edit-test-debug cycle is incredibly fast. Debugging Python programs is easy: a bug or bad input will never cause a segmentation fault. Instead, when the interpreter discovers an error, it raises an...

  • Python Success Stories

    ...interpreter was becoming cumbersome, and because BSL code happened to be very easy to port to Python, I approached the senior developers with the suggestion that we change horses in mid-stream and replace BSL with Python. This proposal was initially met with mixed reactions. There was some concern as to whether any scripting language (either BSL or Python) was really suitable for what amounted to the bulk of the code in the system. There was also a very strong contingent that favored porting sig...

  • Release – Python 3.14.3

    Version: None

    Released: Feb. 3, 2026

    This is third maintenance release of Python 3.14 Python 3.14.3 is the third maintenance release of 3.14, containing around 299 bugfixes, build improvements and documentation changes since 3.14.2. Major new features of the 3.14 series, compared to 3.13 Some of the major new features and changes …

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  • Release – Python 3.14.1

    Version: None

    Released: Dec. 2, 2025

    This is the first maintenance release of Python 3.14 Python 3.14.1 is the first maintenance release of 3.14, containing around 558 bugfixes, build improvements and documentation changes since 3.14.0. Major new features of the 3.14 series, compared to 3.13 Some of the major new features and …

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  • Release – Python 3.14.2

    Version: None

    Released: Dec. 5, 2025

    This is the second maintenance release of Python 3.14 Python 3.14.2 is the second maintenance release of 3.14, containing 18 bugfixes, build improvements and documentation changes since 3.14.1. This is an expedited release to fix the following regressions: gh-142206: Exceptions in multiprocessing in …

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  • What's new in Python 1.5 and beyond

    ...interpreter can be installed at an arbitrary location without having to recompile. The build process now builds a single library (libpython1.5.a) which contains everything except for the main() entry point. This makes life much easier for applications that embed Python. There is much better support for embedding, including threads, multiple interpreters(!), uninitialization, and access to the global interpreter lock. There is a -O option that removes SET_LINENO instructions, assert statements a...

  • Release – Python 3.13.0b1

    Version: None

    Released: May 8, 2024

    This is a beta preview of Python 3.13 Python 3.13 is still in development. This release, 3.13.0b1, is the first of four beta release previews of 3.13. Beta release previews are intended to give the wider community the opportunity to test new features and bug fixes and to …

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  • Release – Python 3.13.0

    Version: None

    Released: Oct. 7, 2024

    This is the stable release of Python 3.13.0 Python 3.13.0 is the newest major release of the Python programming language, and it contains many new features and optimizations compared to Python 3.12. (Compared to the last release candidate, 3.13.0rc3, 3.13.0 contains two small bug fixes and some documentation and …

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  • Release – Python 3.13.2

    Version: None

    Released: Feb. 4, 2025

    This is the second maintenance release of Python 3.13 Python 3.13 is the newest major release of the Python programming language, and it contains many new features and optimizations compared to Python 3.12. 3.13.2 is the latest maintenance release, containing almost 250 bugfixes, build improvements and documentation changes since …

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  • Release – Python 3.13.3

    Version: None

    Released: April 8, 2025

    This is the third maintenance release of Python 3.13 Python 3.13 is the newest major release of the Python programming language, and it contains many new features and optimizations compared to Python 3.12. 3.13.3 is the latest maintenance release, containing almost 320 bugfixes, build improvements and documentation changes since …

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  • Release – Python 3.13.6

    Version: None

    Released: Aug. 6, 2025

    This is the sixth maintenance release of Python 3.13 Python 3.13 is the newest major release of the Python programming language, and it contains many new features and optimizations compared to Python 3.12. 3.13.6 is the sixth maintenance release of 3.13, containing around 200 bugfixes, build improvements and documentation …

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  • Release – Python 3.13.8

    Version: None

    Released: Oct. 7, 2025

    This is the eighth maintenance release of Python 3.13 Python 3.13 is the newest previous major release of the Python programming language, and it contains many new features and optimizations compared to Python 3.12. 3.13.8 is the eighth maintenance release of 3.13, containing around 200 bugfixes, build improvements and …

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  • Release – Python 3.13.10

    Version: None

    Released: Dec. 2, 2025

    This is the tenth maintenance release of Python 3.13 Python 3.13.10 is the tenth maintenance release of 3.13, containing around 300 bugfixes, build improvements and documentation changes since 3.13.9. Major new features of the 3.13 series, compared to 3.12 Some of the new major new features and …

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  • Release – Python 3.13.12

    Version: None

    Released: Feb. 3, 2026

    This is the twelfth maintenance release of Python 3.13 Note: This is Python 3.13.12, a maintenance release for Python 3.13. Python 3.14 is now the latest feature release series of Python 3. Get the latest release of 3.14.x here. Python 3.13.12 is the twelfth maintenance release of …

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  • Progenv SIG - Python programming-environment issues

    ...interpreter, debuggers, browsers, documentation, and so forth, instrumental in the actual act of Python programming. Discussions may cover use of and problems with existing facilities, as well as efforts to produce new tools and solutions. The overall orientation is to foster the development of this programming environment. Further information: Pipermail archives Findmail archives The old list mission statement

  • Thread-SIG - SIG on Process Threading in Python

    ...interpreter lock. The issues of threading with respect to multiprocessor machines are addressed. Archives

  • Release – Python 3.15.0a5

    Version: None

    Released: Jan. 14, 2026

    Note: 3.15.0a4 was accidentally built against main from 2025-12-23 instead of 2026-01-13, so this 3.15.0a5 is an extra release correctly built against 2026-01-14. This is an early developer preview of Python 3.15 Major new features of the 3.15 series, compared to 3.14 Python 3.15 is still in …

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  • Release – Python 3.14.0b3

    Version: None

    Released: June 17, 2025

    It's 3.14 beta 3! https://www.python.org/downloads/release/python-3140b3/ This is a beta preview of Python 3.14 Python 3.14 is still in development. This release, 3.14.0b3, is the third of four planned beta releases. Beta release previews are intended to give the wider community the opportunity to test new features …

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  • Release – Python 3.13.0b3

    Version: None

    Released: June 27, 2024

    This is a beta preview of Python 3.13 Python 3.13 is still in development. This release, 3.13.0b3, is the third of four beta release previews of 3.13. Beta release previews are intended to give the wider community the opportunity to test new features and bug fixes and to …

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  • Release – Python 3.13.5

    Version: None

    Released: June 11, 2025

    This is the fifth maintenance release of Python 3.13 Python 3.13 is the newest major release of the Python programming language, and it contains many new features and optimizations compared to Python 3.12. 3.13.5 is the fifth maintenance release of 3.13. 3.13.5 is an expedited release to fix …

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