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  • Bugs in Python 2.3

    Bugs in Python 2.3 IDLE now executes code in a separate process. To communicate between the main process and executing processes, IDLE opens a socket to 127.0.0.1 (the local machine). Some firewalls running on Windows machines interfere with this and can cause either silent failures or erroneous popup windows from the firewall. This problem only occurs if you run a firewall on the same machine as IDLE. IDLE fails to start on Windows if installed to a directory with a space (e.g. C:\Program...

  • FSF response to the Python 2.1 license

    FSF response to the Python 2.1 license FSF response to the Python 2.1 license Today, I received the following email from Eben Moglen, the Free Software Foundation's attorney. (See also a postscript.) Subject: Re: Python 1.6.1 and GPL compatibility From: Eben Moglen <moglen@columbia.edu> To: Guido van Rossum <guido@digicool.com> Cc: "Bradley M. Kuhn" <bkuhn@gnu.org>, rms@gnu.org Date: Thu, 19 Apr 2001 07:44:11 -0400 (EDT) On Wednesday, 18 April 2001, Guido van Rossum w...

  • Highlights: Python 2.4

    Highlights: Python 2.4 Highlights: Python 2.4 Here are the (subjective) highlights of what's new in Python 2.4. Faster A number of modules that were added in Python 2.3 (such as sets and heapq) have been recoded in C. In addition, there's been a number of other speedups to the interpreter. (See section 8.1, Optimizations, of the "What's New" document for more). New language features multi-line imports - when using imports in the form from foo import bar, baz, bing, bang, you c...

  • Python Software Foundation Press Releases

    Python Software Foundation Press Releases Because the PSF is a membership organization, PSF news is usually sent to a members mailing list, or posted on this web site. The PSF may also issue press releases from time to time, for news of general interest. In addition, some press releases issued by other organizations relevant to Python are listed below. Python Software Foundation December 20, 2019 - Python 2 Series To Be Retired By April 2020 March 9, 2005 - PyCon 2005: Keynote Speech From ...

  • 👋 Hey Community Members!

    👋 Hey Community Members! More than 20 ways to get involved & stay informed! Watch any of these talks given about the PSF (most recent one is about PyPI presented by Ee, our Director of Infrastructure!) Want to financially support the PSF? Donate! Read our blog Sign up to receive our quarterly newsletter Follow us on Twitter or Mastodon Become a Basic member If you are already a Basic member, consider becoming a Contributing, Managing, and/or Supporting member. If you want to be a PSF Boar...

  • Event Organizer Resource Library

    Event Organizer Resource Library Title and Author(s) or Organizer of Resource Topic and Type of Resource Short Description One Event at a Time: Funding Your Community the Realistic Way by Georgi Ker Fundraising - Written Guide A practical, experience-based playbook for community event organizers to build more sustainable funding through sponsorship strategies in light of the PSF’s grants pause. Organizing and Managing Open Source Events by the TODO Group Event organizing - Written gui...

  • Other Catalog Systems

    Other Catalog Systems Other Catalog Systems This page collects useful links that will help you learn about the catalog systems used by other projects. We've tracked down the instructions so that you don't have to. CPAN CPAN search page PAUSE (instructions for registering and uploading modules) Zen of Comprehensive Archive Networks: a note from CPAN's maintainers. (A less interesting document than it sounds, unfortunately.) Perl Package Manager from ActiveSt...

  • What's new in Python 1.5 and beyond

    What's new in Python 1.5 and beyond If you download the source release, there's a loooong list of changes since release 1.4 in the file Misc/NEWS. Below are some highlights. (Or go directly to the listings of what's new in 1.5b1, what's new in 1.5b2, and what's new in 1.5 (final).) For an essay on the (difficult!) subject of metaprogramming, see my essay Metaprogramming in Python 1.5. See also the description of some major new features in version 1.5: Built-in Package Support and Stand...

  • PSF Fellows Roster

    PSF Fellows Roster Nominate a Fellow The criteria for PSF Fellows and how to nominate someone to be a Fellow can be found on our PSF Fellow main page. Fellows of the Python Software Foundation Fellows The year the fellow was elected is in parentheses. Aaron Yankey (2019) Abhijeet Mote (2025) Abigail Afi Gbadago (2025) Abigail Mesrenyame Dogbe (2019) Abhishek Mishra (2023) Adam Johnson (2024) Adrian Holovaty (2009) Aidis Stukas (2025) Aisha Bello (2017) Al Sweigart (2020) Alex Gaynor...

  • Release – Python 2.7.9rc1

    Version: None

    Released: Nov. 26, 2014

    Python 2.7.9rc1 is the first release candidate for the next bugfix version of the Python 2.7 series. Python 2.7.9 will include several significant changes unprecedented in a "bugfix" release: The entirety of Python 3.4's ssl module has been backported for Python 2.7.9. See PEP 466 for justification. …

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  • Retired SIGS

    Retired SIGS These are SIGs that existed in the past but are no longer active. Their archives and home pages are retained. A retired SIG can be revived, using the same criteria as for creating a new SIG. Name Coordinator Description Info   catalog-sig A.M. Kuchling The Python software catalog archive March 2013 compiler-sig Jeremy Hylton Compiling and parsing Python Type checking, code generation archive May 2001 do-sig David Arnold Distributed Object Technologies archive A...

  • Python 2.2.1 license

    Python 2.2.1 license Python 2.2.1 license This is the official license for the Python 2.2.1 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 th...

  • Python 2.2.2 license

    Python 2.2.2 license Python 2.2.2 license This is the official license for the Python 2.2.2 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 th...

  • Python 2.2.3 license

    Python 2.2.3 license Python 2.2.3 license This is the official license for the Python 2.2.3 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 th...

  • Python 2.3 license

    Python 2.3 license Python 2.3 license This is the official license for the Python 2.3 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 Corp...

  • Python documentation by version

    Python documentation by version Some previous versions of the documentation remain available online. Use the list below to select a version to view. For unreleased (in development) documentation, see In development versions. Python 3.14.0, documentation released on 7 October 2025. Python 3.13.9, documentation released on 14 October 2025. Python 3.13.8, documentation released on 7 October 2025. Python 3.13.7, documentation released on 14 August 2025. Python 3.13.6, documentation released on 6...

  • Python 2.3.1 license

    Python 2.3.1 license Python 2.3.1 license This is the official license for the Python 2.3.1 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 th...

  • Python 2.3.2 license

    Python 2.3.2 license Python 2.3.2 license This is the official license for the Python 2.3.2 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 th...

  • Python 2.3.3 license

    Python 2.3.3 license Python 2.3.3 license This is the official license for the Python 2.3.3 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 th...

  • Python 2.3.4 license

    Python 2.3.4 license Python 2.3.4 license This is the official license for the Python 2.3.4 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 th...

Python language documentation

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