Notice: This page displays a fallback because interactive scripts did not run. Possible causes include disabled JavaScript or failure to load scripts or stylesheets.

≡ Menu

Search Python.org

Results

  • Release – Python 2.5.1

    Version: None

    Released: April 19, 2007

    Python 2.5.1 was released on April 18th, 2007. This is the first bugfix release of Python 2.5. Python 2.5 is now in bugfix-only mode; no new features are being added. According to the release notes, over 150 bugs and patches have been squished since Python 2.5, including a …

    View Release Notes

  • Release – Python 2.4.4

    Version: None

    Released: Oct. 18, 2006

    Python 2.4 is now in bugfix-only mode; no new features are being added. At least 80 bugs have been squished since Python 2.4.3, including a number of bugs and potential bugs found by with the Coverity and Klocwork static analysis tools. We'd like to offer our thanks to both …

    View Release Notes

  • 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, …

    View Release Notes

  • Release – Python 3.14.0rc1

    Version: None

    Released: July 22, 2025

    It's the first 3.14 release candidate! https://www.python.org/downloads/release/python-3140rc1/ This is the first release candidate of Python 3.14 This release, 3.14.0rc1, is the penultimate release preview. Entering the release candidate phase, only reviewed code changes which are clear bug fixes are allowed between this release candidate and the …

    View Release Notes

  • Python Success Stories

    Python Success Stories Introduction ForecastWatch.com, a service of Intellovations, is in the business of rating the accuracy of weather reports from companies such as Accuweather, MyForecast.com, and The Weather Channel. Over 36,000 weather forecasts are collected every day for over 800 U.S. cities, and later compared with actual climatological data. These comparisons are used by meteorologists to improve their weather forecasts, and to compare their forecasts with others. They are also used...

  • Python Success Stories

    Python Success Stories Introduction The GravityZoo Company, founded in late 2005 is a pioneering innovator of Software as a Service (SaaS) enabling technology, Ubiquitous Computing and Ambient Intelligence Systems. The core technology of the Company is its framework. This GravityZoo Framework is designed to develop and host any kind of application while simultaneously making these applications available at anytime, anyplace. The latter on any type of client device, be it a PC, a mobile client...

  • Debugging Reference Count Problems

    Debugging Reference Count Problems Warning This page stays here for historical reasons and it may contain outdated or incorrect information. Debugging Reference Count Problems From: Guido van Rossum <guido@CNRI.Reston.VA.US> To: python-list@cwi.nl Date: Wed, 27 May 1998 11:09:40 -0400 Mike Fletcher wrote a number of posts about debugging C code that bombs, probably because of reference count problems. His approach to debugging this problem seems typical, but I thin...

  • Python 2.4.3 Release

    Python 2.4.3 Release Python 2.4.3 Python 2.4.3 has been replaced by a newer bugfix release of Python. Please see the releases page to select a more recent release. Important: This release is vulnerable to the problem described in security advisory PSF-2006-001 "Buffer overrun in repr() of unicode strings in wide unicode builds (UCS-4)". This fix is included in Python 2.4.4 We are pleased to announce the release of Python 2.4.3 (final), a bugfix release of Python 2.4, on March 29,...

  • Python 2.4.4 Release

    Python 2.4.4 Release Python 2.4.4 We are pleased to announce the release of Python 2.4.4 (FINAL), a bugfix release of Python 2.4, on October 18, 2006. Important: 2.4.4 includes a security fix (PSF-2006-001) for the repr() of unicode strings in wide unicode builds (UCS-4) Python 2.4 is now in bugfix-only mode; no new features are being added. At least 80 bugs have been squished since Python 2.4.3, including a number of bugs and potential bugs found by with the Coverity and Klocwork static an...

  • Python 2.5 Release

    Python 2.5 Release Python 2.5 Python 2.5 has been replaced by a newer bugfix release of Python. Please download Python 2.5.6 instead. Python 2.5 was released on September 19th 2006. There's a bunch of places you can look for more information on what's new in this release -- see the "What's New" section further down this page. This is a final release, and should be suitable for production use. PEP 356 includes the schedule and will be updated as the schedule evolves. At this point, ...

  • Python 2.5.1 Release

    Python 2.5.1 Release Python 2.5.1 Python 2.5.1 has been replaced by a newer bugfix release of Python. Please download Python 2.5.6 instead. Python 2.5.1 was released on April 18th, 2007. This is the first bugfix release of Python 2.5. Python 2.5 is now in bugfix-only mode; no new features are being added. According to the release notes, over 150 bugs and patches have been squished since Python 2.5, including a fair number in the new AST compiler (an internal implementation detail of the Pyth...

  • Python 2.5.2 Release

    Python 2.5.2 Release Python 2.5.2 Python 2.5.2 has been replaced by a newer bugfix release of Python. Please download Python 2.5.6 instead. Python 2.5.2 was released on February 21st, 2008. This is the second bugfix release of Python 2.5. Python 2.5 is now in bugfix-only mode; no new features are being added. According to the release notes, over 100 bugs and patches have been addressed since Python 2.5.1, many of them improving the stability of the interpreter, and improving its portability....

  • Python 2.5.3 Release

    Python 2.5.3 Release Python 2.5.3 Python 2.5.3 has been replaced by a newer bugfix release of Python. Please download Python 2.5.6 instead. Python 2.5.3 was released on December 19th, 2008. This is the last bugfix release of Python 2.5. Python 2.5 is now in bugfix-only mode; no new features are being added. According to the release notes, about 80 bugs and patches have been addressed since Python 2.5.2, many of them improving the stability of the interpreter, and improving its portability. F...

  • 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&...

  • Python 3.4.0 Release Candidate 1 Release

    Python 3.4.0 Release Candidate 1 Release Python 3.4.0 release candidate 1 Note: Python 3.4.0rc1 has been superseded by Python 3.4.9. Python 3.4.0 release candidate 1 was released on February 10th, 2014. This is a preview release of the next major release of Python, Python 3.4, and is not suitable for production environments. 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 fix...

  • 2010 PSF Members' Meeting Minutes (informal)

    2010 PSF Members' Meeting Minutes (informal) The Python Software Foundation Minutes of the 2010 Members' Meeting February 19, 2010 The Python Software Foundation (the "PSF") held an informal annual members' meeting on February 19, 2010 during lunch at the Hyatt Regency Atlanta hotel in Atlanta, Georgia, USA (PyCon 2010 Atlanta). Steve Holden presided over the meeting. Pat Campbell prepared these minutes. Contents 1   Attendance 2   Greetings &a...

  • Python 3.4.0 Release Candidate 2 Release

    Python 3.4.0 Release Candidate 2 Release Python 3.4.0 release candidate 2 Note: Python 3.4.0rc2 has been superseded by Python 3.4.9. Python 3.4.0 release candidate 2 was released on February 23th, 2014. This is a preview release of the next major release of Python, Python 3.4, and is not suitable for production environments. 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 fix...

  • Donation Drive

    Donation Drive ThePSF, Python Software Foundation, Python, PSF Support the PSF to further the development and adoption of Python .crm-contribute-widget { font-size:12px; font-family:Helvetica, Arial, sans; padding:6px; -moz-border-radius: 4px; -webkit-border-radius: 4px; -khtml-border-radius: 4px; border-radius: 4px; border:1px solid #96C0E7; width:200px; } .crm-contribute-...

  • PSF Sponsorship Prospectus

    PSF Sponsorship Prospectus sponsorship sponsor prospectus PSF Sponsorship Program Your contributions matter and they make an IMPACT. Below are some of the ways the PSF uses its funding to support the Python community: Python Community Infrastructure The PSF supports the Python Package Index (PyPI), mail.python.org, wiki.python.org, and us.pycon.org. In addition to the costs of the community web services we provide, we need staff to expand our services programs and keep them running 24/...

  • Release – Python 3.14.0b1

    Version: None

    Released: May 7, 2025

    Only one day late, welcome to the first beta! This is a beta preview of Python 3.14 Python 3.14 is still in development. This release, 3.14.0b1, is the first of four planned beta releases. Beta release previews are intended to give the wider community the opportunity to …

    View Release Notes

Python language documentation

If you didn't find what you need, try your search in the Python language documentation.