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  • Release – Python 2.4.5

    Version: None

    Released: March 11, 2008

    Python 2.4 is now in security-fix-only mode. No new features are being added, and bugs are not fixed anymore unless they affect the stability and security of the interpreter, or of Python applications. This release includes just a small number of fixes, primarily preventing crashes of the interpreter in …

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  • Proposed Improvements to Module Cleanup

    ...Python 1.5.1. Contents: Algorithms Motivation Problems and Questions Revised version Based on some comments I received and some more thinking, I've changed this a bit since my web posting on this subject. Significant Changes are indicated in the text by [italicized remarks in square brackets]. Algorithms When a Python interpreter is deleted, its variables and modules are "cleared carefully" in a partially specified order. The operation "clear carefully" is define...

  • Release – Python 3.14.0rc2

    Version: None

    Released: Aug. 14, 2025

    It's the final 🪄 penultimate 🪄 3.14 release candidate! Note: rc2 was originally planned for 2025-08-26, but we fixed a bug that required bumping the magic number stored in Python bytecode (.pyc) files. This means .pyc files created for rc1 cannot be used for rc2, and they'll …

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  • Release – Python 3.14.0rc3

    Version: None

    Released: Sept. 18, 2025

    It's 🪄 finally 🪄 the final 3.14 release candidate! Note: It's another magic release. We fixed another bug that required bumping the magic number stored in Python bytecode (.pyc) files. This means file .pyc files created for rc2 cannot be used for rc3, and they'll be recompiled. …

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  • PSF Contributor Agreement for Python

    ...Python Contributor Agreement This Contributor Agreement is between Python Software Foundation (“PSF”) and the individual or other entity identified below (“the Contributor”): Contributor: __________________________________________ Address: __________________________________________ __________________________________________ Email: __________________________________________ Contributor offers to license certain software (a “Contrib...

  • Release – Python 3.7.14

    Version: None

    Released: Sept. 6, 2022

    Note: The release you are looking at is a security bugfix 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. Please …

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  • Release – Python 3.8.16

    Version: None

    Released: Dec. 6, 2022

    This is a security release of Python 3.8 Note: The release you're looking at is Python 3.8.16, a security bugfix release for the legacy 3.8 series. Python 3.11 is now the latest feature release series of Python 3. Get the latest release of 3.11.x here. Security content …

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  • Python Success Stories

    ...Python and Jython, the Java implementation of Python, were chosen because they would allow both the PowerPC and Java implementations of the PanMachine to execute the same user interface layouts. Python, implemented in C, was used on the PowerPC, and Jython, implemented in Java, was used in the browser applet. Implementation in Python Re-implementation using Python went smoothly. The Python language interpreter and support libraries are written in C and can be compiled with most C compilers. I...

  • Python Success Stories

    ...Python-scripted HTML. Some of the modules, such as the search spider, GUI, and HTTP server, were written in Python. For performance reasons, others, such as the query engine, indexer, and HTML parser, use the Python/C API to incorporate functionality written in C. The C-based search engine core was also wrapped as a Python extension module. Some C++ is used in the interfaces to key third party technologies. Python's flexibility in this regard gave us a wide degree of flexibility in integration. ...

  • Notes

    ...Python 2.1.1 (final) ? The following bugs were fixed: [ #441664 ] Python crash on del of a slice of a mmap [ #438050 ] configure doesn't look for poll.h in sys [ #437487 ] 2.1 build on Solaris fails if CC is set [ #441527 ] unixccompiler preprocessor broken What's New in Python 2.1.1c1 ? Python 2.1.1 comes with the new, GPL-compatible PSF licence. Several insecurities in dict comparison as well as a scoping bug, that could lead to the Python interpreter crashing were fixed. Python should ...

  • Release – Python 3.12.6

    Version: None

    Released: Sept. 6, 2024

    This is the sixth maintenance release of Python 3.12 Python 3.12 is the newest major release of the Python programming language, and it contains many new features and optimizations. 3.12.6 is the latest maintenance release, containing about 90 bugfixes, build improvements and documentation changes since 3.12.5. This is an …

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  • Python Software Foundation: Press Release 20-Dec-2019

    ...Python 3 will be the only major version of CPython that is actively maintained for bugs and security issues. Users are urged to migrate to a supported version of Python 3 in order to benefit from its many improvements, as well as to avoid potential security vulnerabilities in Python 2.x after April 2020. For the current status of Python 3 versions, see https://devguide.python.org/#status-of-python-branches. Users of commercial Python distributions and commercial applications that embed a Pytho...

  • PSF Contributor Agreement for Jython

    PSF Contributor Agreement for Jython Contributor Agreement for Jython This Contributor Agreement is between Python Software Foundation (“PSF”) and the individual or other entity identified below (“the Contributor”): Contributor: __________________________________________ Address: __________________________________________ __________________________________________ Email: __________________________________________ Contributor offers to li...

  • Python Success Stories

    ...Python's syntax was much cleaner and because I had heard that large Tcl programs could be hard to maintain. Java had the disadvantage of requiring compilation with each change in the code, and the ability to run code in any recent browser was of no use for this project. Java's verbose syntax as compared to Python was also a point against it. Python was just as portable as Java and a much easier to learn and use language. I'd also read the Python tutorial, seen various Python programs and liked t...

  • Python Patterns - An Optimization Anecdote

    ...Python-C API, so I expected at most modest speed up compared to f7(). Given the effort of writing and testing an extension (compared to whipping up those Python one-liners), as well as the dependency on a non-standard Python extension, I decided not to pursue this option... Conclusion If you feel the need for speed, go for built-in functions - you can't beat a loop written in C. Check the library manual for a built-in function that does what you want. If there isn't one, h...

  • Release – Python 3.13.0a3

    Version: None

    Released: Jan. 17, 2024

    This is an early developer preview of Python 3.13 Major new features of the 3.13 series, compared to 3.12 Python 3.13 is still in development. This release, 3.13.0a3, is the third of six planned alpha releases. Alpha releases are intended to make it easier to test the …

  • Python 2.5.4 Release

    Python 2.5.4 Release Python 2.5.4 We are pleased to announce the release of Python 2.5.4 (final), a bugfix release of Python 2.5, on December 23rd, 2008. Python 2.5.4 has been replaced by a newer bugfix release of Python. Please download Python 2.5.6 instead, unless you need to use the Windows and OS X binaries provided here. This is the last bugfix release of Python 2.5. Future releases of Python 2.5 will only contain security patches; no new features are being added, and no "regular&...

  • Release – Python 2.5.4

    Version: None

    Released: Dec. 23, 2008

    This is the last bugfix release of Python 2.5. Future releases of Python 2.5 will only contain security patches; no new features are being added, and no "regular" bugs will be fixed anymore. According to the release notes, about 80 bugs and patches have been addressed since Python 2.5.2, …

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  • Python 2.2.2

    ...Python 2.4.4 and Python 2.5. If you need to remain with Python 2.2, there's a patch available from the security advisory page. We are pleased to announce the release of Python 2.2.2, on October 14, 2002. This is a bug-fix release for Python 2.2 and supersedes the previous bugfix release, Python 2.2.1. Download the release Windows users should download the Windows installer, Python-2.2.2.exe, run it and follow the friendly instructions on the screen to complete the instal...

  • Python 2.1.2

    Python 2.1.2 Python 2.1.2 - a bugfix release for Python 2.1 Note: This is no longer the most current Python release. See Python 2.1.3 for a patch release and the download page for more recent releases. On January 16 2002, we're releasing Python 2.1.2 - a bugfix release of Python 2.1. We thank Anthony Baxter for being the releasemeister for this release (and we're using his timezone as an excuse to say it's January 16 :-). This is the final release of Python 2.1.2. While ...

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