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  • Release – Python 3.13.1

    Version: None

    Released: Dec. 3, 2024

    This is the first 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. 3.13.1 is the latest maintenance release, containing almost 400 bugfixes, build improvements and documentation changes since 3.13.0. …

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  • Python Success Stories

    ...Python C Extension Modules IronPython scripts can in general import and use regular Python modules. However, IronPython cannot import C extension modules. Such modules generally have a .pyd extension, and consist of compiled C or C++, exposing an API to let them be imported like a Python library. Such modules include some of the Python standard library, such as cmath, array, parser, and subprocess. Much of this missing functionality is compensated for by the availability of equivalent .NET libra...

  • Release – Python 3.13.0rc3

    Version: None

    Released: Oct. 1, 2024

    This is the third release candidate of Python 3.13.0 This release, 3.13.0rc3, is the final release preview (no really) of 3.13. This release is expected to become the final 3.13.0 release, barring any critical bugs being discovered. The official release of 3.13.0 is now scheduled for Monday, 2024-10-07. This …

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  • Python Success Stories

    ...and the widespread and consistent use of a few basic concepts, like namespaces, help to make Python code readable and maintainable. Extensive and easy to use introspection facilities make Python easy to learn interactively by discovering its capabilities, including documentation, from the command prompt. Python is readily extensible in C or C++, so it is easy to incorporate non-Python modules into an application. Python has played an important role in the success of LivingLogic AG, and will co...

  • Release – Python 3.14.0b4

    Version: None

    Released: July 8, 2025

    It's the final 3.14 beta! https://www.python.org/downloads/release/python-3140b4/ This is a beta preview of Python 3.14 Python 3.14 is still in development. This release, 3.14.0b4, is the last of four planned beta releases. Beta release previews are intended to give the wider community the opportunity to test new features and bug fixes …

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  • Notes

    ...cause Python's cyclic gc had no knowledge of Python's weakref objects. It does now. When weakrefs with callbacks become part of cyclic garbage now, those weakrefs are cleared first. The callbacks don't trigger then, preventing the problems. If you need callbacks to trigger, then just as when cyclic gc is not involved, you need to write your code so that weakref objects outlive the objects they weakly reference. Critical bugfix, for SF bug 840829: if cyclic garbage collection happened to occ...

  • Python 2.4.1 - Release Notes

    ...cipate in GC. To upgrade an extension module: rename Py_TPFLAGS_GC to PyTPFLAGS_HAVE_GC use PyObject_GC_New or PyObject_GC_NewVar to allocate objects and PyObject_GC_Del to deallocate them rename PyObject_GC_Init to PyObject_GC_Track and PyObject_GC_Fini to PyObject_GC_UnTrack remove PyGC_HEAD_SIZE from object size calculations remove calls to PyObject_AS_GC and PyObject_FROM_GC Two new functions: PyString_FromFormat() and PyString_FromFormatV(). These can be used safely to construct strin...

  • Release – Python 3.14.0a4

    Version: None

    Released: Jan. 14, 2025

    Hello, three dot fourteen dot zero alpha four! This is an early developer preview of Python 3.14 Major new features of the 3.14 series, compared to 3.13 Python 3.14 is still in development. This release, 3.14.0a4, is the fourth of seven planned alpha releases. Alpha releases are intended to make …

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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 and bug fixes and …

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  • Release – Python 3.14.0

    Version: None

    Released: Oct. 7, 2025

    This is the stable release of Python 3.14.0 Python 3.14.0 is the newest major release of the Python programming language, and it contains many new features and optimisations compared to Python 3.13. 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 3.7.0a1

    Version: None

    Released: Sept. 19, 2017

    This is an early developer preview of Python 3.7 Major new features of the 3.7 series, compared to 3.6 Python 3.7 is still in development. This releasee, 3.7.0a1 is the first of four planned alpha releases. Alpha releases are intended to make it easier to test the current state of …

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  • Python Software Foundation: Press Release 9-Mar-2005

    ...ct and releases of their CollabNet Enterprise Edition product. He also worked at Microsoft as a Development Manager, in the Commerce Server and Site Server groups. Greg was a co-founder and the Corporate Technologist of eShop, one of the first electronic commerce software companies, before its acquisition by Microsoft. In Greg's spare time, he works on many open source projects, such as Subversion, WebDAV, and Python. He also works on Apache projects and is the current Chairman of t...

  • Python Humor

    ...ce) language of my choice, because stallman.el wasn't compatible with the new fangled Emacs 18 that was being worked on, and nobody understood how the old code worked anyway. So I chose Python because of its cool name and the fact that font-lock actually worked for Python syntax, and I wrote a Python C extension that allowed me to embed Emacs in Python, and to seamlessly call Elisp programs from Python. This was actually cleaner than JPython is now (sorry Jim), except for one little problem. ...

  • 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 final release. The …

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  • Release – Python 3.7.0b1

    Version: None

    Released: Jan. 31, 2018

    This is a beta preview of Python 3.7 Python 3.7 is still in development. This release, 3.7.0b1, is the first of four planned beta release previews. Among the major new features in Python 3.7 are: PEP 538, Coercing the legacy C locale to a UTF-8 based locale PEP 539 …

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  • Release – Python 2.2.1

    Version: None

    Released: April 10, 2002

    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 and Python 2.5. If you need to remain with Python 2.2, there's a patch available from the …

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  • Matching Donations

    ...and international community of Python programmers. Your employer may receive a tax deduction for contributions to the Python Software Foundation (PSF) (EIN 04-3594598) , which is a public charity classified as exempt under section 501(c)(3) of the Internal Revenue Code. How to donate and have your company match In a few simple steps, you can see if your company offers a matching gift program. Make a contribution to the PSF here. Check with your company's Human Resources or Accou...

  • [PYTHON MATRIX-SIG] FAQ

    ...cs.mit.edu/pub/jjh/NumericalPython-0.36.tar.gz This is the latest version. New versions will be made available atthis location. 3) Is there any documentation? There's incomplete online documentation written by David Ascher for acourse he taught using Numerical Python at: http://starship.python.net/~da/Python/Numeric/ There's a paper soon to be published in Computers and Physics writtenby Dubois, Hinsen and Hugunin at: ftp://ftp-icf.llnl.gov/pub/basis/numerical_python.ps There&#...

  • Highlights: Python 2.4

    ...and the string methods ljust(), rjust() and center() accept an argument to specify the fill character. eval() now accepts any form of object that acts as a mapping as its argument for locals, rather than only accepting a dictionary. There's all sorts of new and shiny evil possible thanks to this little change. New or upgraded modules and packages a new subprocess module for spawning processes in a platform-independent way (see PEP 324) decimal - a new numeric type that allows for the accura...

  • Python Software Foundation: Missing 1023 form

    ...c inspection for three years after the due date of the return. You can charge only a reasonable fee for reproduction and actual postage costs for the copied materials. The law does not require you to provide copies of public inspection documents that are widely available, such as by posting them on the Internet (World Wide Web). You may be liable for a penalty of $20 a day for each day you do not make these documents available for public inspection (up to a maximum of $10,000 in the case...

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