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  • Python 2.6.8 Release

    Python 2.6.8 Release Python 2.6.8 Python 2.6.8 has been replaced by a newer security-fix source-only release. Please download Python 2.6.9 instead. Python 2.6.8 is a security-fix source-only release for Python 2.6.7, fixing several reported security issues: issue 13703 (oCERT-2011-003, CVE-2012-1150, hash collision denial of service), issue 14234 (CVE-2012-0876, pyexpat hash randomization), issue 14001 (CVE-2012-0845, SimpleXMLRPCServer denial of service), and issue 13885 (CVE-2011-3389, di...

  • Download Python 1.6.1 Windows Installer

    Download Python 1.6.1 Windows Installer Python 1.6.1 CNRI OPEN SOURCE GPL-COMPATIBLE LICENSE AGREEMENT IMPORTANT: PLEASE READ THE FOLLOWING AGREEMENT CAREFULLY. BY CLICKING ON "ACCEPT" WHERE INDICATED BELOW, OR BY COPYING, INSTALLING OR OTHERWISE USING PYTHON 1.6.1 SOFTWARE, YOU ARE DEEMED TO HAVE AGREED TO THE TERMS AND CONDITIONS OF THIS LICENSE AGREEMENT. 1. This LICENSE AGREEMENT is between the Corporation for National Research Initiatives, having an office at 1895 P...

  • Python 3.1.2 Release

    Python 3.1.2 Release Python 3.1.2 Note: It is recommended that you use the latest bug fix release of the 3.1 series, 3.1.4. Python 3.1.2 was released on March 21st, 2010. The Python 3.1 version series is a continuation of the work started by Python 3.0, the new backwards-incompatible series of Python. Improvements in this release include: An ordered dictionary type Various optimizations to the int type New unittest features including test skipping and new assert methods. A much faster io mo...

  • Release – Python 3.1.5

    Version: None

    Released: April 9, 2012

    Python 3.1.5 Python 3.1.5 is a security-fix source-only release for Python 3.1.4, fixing several reported security issues: issue 13703 (oCERT-2011-003, hash collision denial of service), issue 14234 (CVE-2012-0876, hash table collisions CPU usage DoS in the expat library), issue 14001 (CVE-2012-0845, SimpleXMLRPCServer denial of service), and issue 13885 (CVE-2011-3389, …

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  • Python 3.1.5 Release

    Python 3.1.5 Release Python 3.1.5 Python 3.1.5 is a security-fix source-only release for Python 3.1.4, fixing several reported security issues: issue 13703 (oCERT-2011-003, hash collision denial of service), issue 14234 (CVE-2012-0876, hash table collisions CPU usage DoS in the expat library), issue 14001 (CVE-2012-0845, SimpleXMLRPCServer denial of service), and issue 13885 (CVE-2011-3389, disabling of the CBC IV attack countermeasure in the _ssl module). Python 3.1.5 was released on April...

  • PSF Trademark Usage Policy

    PSF Trademark Usage Policy PSF Trademark Policy and Guidelines 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 the PSF. The Python logos (in severa...

  • Release – Python 3.1.1

    Version: None

    Released: Aug. 17, 2009

    Python 3.1.1 has been superseded by 3.1.2. You can download 3.1.2. Python 3.1.1 was released on August 17th, 2009. Python 3.1 is a continuation of the work started by Python 3.0, the new backwards-incompatible series of Python. Improvements in this release include: An ordered dictionary type Various optimizations …

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  • Release – Python 2.0.1

    Version: None

    Released: June 22, 2001

    We're releasing Python 2.0.1 - the final bugfix release for Python 2.0. Why would we come with a bugfix release now (June 2001), when Python 2.0 was released in October 2000 and Python 2.1 has been released for months (April 2001)? Two very good …

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  • Python 1.6 License FAQ

    Python 1.6 License FAQ Python 1.6 License FAQ This FAQ addresses questions concerning the CNRI Open Source License and its impact on past and future Python releases. The text below has been approved for posting on the Python website and newsgroup by CNRI's president, Dr. Robert E. Kahn. The old Python license from CWI worked well for almost 10 years. Why a new license for Python 1.6? CNRI claims copyright in Python code and documentation from releases 1.3 through 1.6 inc...

  • Python 1.6 License FAQ

    Python 1.6 License FAQ Python 1.6 License FAQ This FAQ addresses questions concerning the CNRI Open Source License and its impact on past and future Python releases. The text below has been approved for posting on the Python website and newsgroup by CNRI's president, Dr. Robert E. Kahn. The old Python license from CWI worked well for almost 10 years. Why a new license for Python 1.6? CNRI claims copyright in Python code and documentation from releases 1.3 through 1.6 inc...

  • Release – Python 3.1.2

    Version: None

    Released: March 20, 2010

    Note: It is recommended that you use the latest bug fix release of the 3.1 series, 3.1.4. Python 3.1.2 was released on March 21st, 2010. The Python 3.1 version series is a continuation of the work started by Python 3.0, the new backwards-incompatible series of Python. Improvements in …

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  • Python 2.4.1 license

    Python 2.4.1 license Python 2.4.1 license This is the official license for the Python 2.4 release: A. HISTORY OF THE SOFTWARE Python was created in the early 1990s by Guido van Rossum at Stichting Mathematisch Centrum (CWI, see http://www.cwi.nl) in the Netherlands as a successor of a language called ABC. Guido remains Python's principal author, although it includes many contributions from others. In 1995, Guido continued his work on Python at the Corporation for National Research Initiativ...

  • Python 2.6.9 Release

    Python 2.6.9 Release Python 2.6.9 Python 2.6.9 is a security-fix source-only release for Python 2.6.8, fixing several reported security issues: issue 16037, issue 16038, issue 16039, issue 16040, issue 16041, and issue 16042 (CVE-2013-1752, long lines consuming too much memory), as well as issue 14984 (security enforcement on $HOME/.netrc files), issue 16248 (code execution vulnerability in tkinter), and issue 18709 (CVE-2013-4238, SSL module handling of NULL bytes inside subjectAltName). Py...

  • Python 2.0

    Python 2.0 Python 2.0 Note: This is no longer the most current Python release. See Python 2.0.1 for a patch release and the download page for more recent releases. The final version of Python 2.0 was released on October 16, 2000. Download What's new (overview) What's new (details) Post-release news For critical patches, a Python 2.0 specific FAQ, and other issues that have come up since the release, please go to the new Python 2.0 info area, a set of user-editabl...

  • Python Success Stories

    Python Success Stories Background MayaVi is an open source scientific data visualization tool written entirely in Python. I started work on MayaVi in 2000. At that time, a few colleagues of mine needed to visualize their computational fluid dynamics (CFD) data but the only suitable tools available were commercial, closed source programs that were prohibitively expensive. We looked at some open source tools as alternatives. OpenDX had just been released to the public and at that time was har...

  • Python Success Stories

    Python Success Stories Background Successful information search is mission-critical. It increases worker efficiency and saves money. On an external web site, it also increases customer satisfaction and helps retain users to the web site. The average company can waste millions of dollars because its employees cannot locate and retrieve the information that is needed for their jobs. Infoseek released the original version of Ultraseek Server on March 31, 1997. It was built by wrapping Infoseek's...

  • Frank Willison Memorial Award

    Frank Willison Memorial Award Contributions can encompass so much more than code. A successful software community requires time, dedication, communication, and education as well as elegant code. With the Frank Willison Memorial Award, we hoped to acknowledge all of those things. —Tim O'Reilly The Frank Willison Memorial Award for Contributions to the Python Community is given annually to a person judged to have made an outstanding contribution to the Python community. The award was ...

  • Python Success Stories

    Python Success Stories Introduction To be the industry leader in Managed Hosting, you have to be fast and flexible. By using Python to implement our enterprise data systems, Rackspace can quickly and effectively change its internal systems to keep up with shifts in the industry and in our own business processes. We do this through a central customer information system called "CORE," which is used both for Customer Relationship Management (CRM) and Enterprise Resource Planning (ERP)....

  • Fiscal Sponsorees

    Fiscal Sponsorees The Python Software Foundation promotes, protects, and advances the Python programming language and supports and facilitates the growth of a diverse and international community of Python programmers. Part of that mission includes acting as a fiscal sponsor to mission-related Python events, groups, and projects. The PSF provides 501(c)(3) tax-exempt status to fiscal sponsorees and manages back office issues like cash flow, accounting, budgeting, insurance, and contract/legal ...

  • Release – Python 3.15.0a2

    Version: None

    Released: Nov. 19, 2025

    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 development. This release, 3.15.0a2, is the second of seven planned alpha releases. Alpha releases are intended to make it easier to test the current state of …

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