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  • Unifying types and classes in Python 2.2

    ...classes class C1: __metaclass__ = M1 class C2(C1): __metaclass__ = M2 class C3(C1, C2): __metaclass__ = M3 class D(C2, C3): __metaclass__ = M1 class C4: __metaclass__ = M4 class E(C3, C4): pass For class C2, the constraint is satisfied because M2 is a subclass of M1. For class C3, it is satisfied because M3 is a subclass of both M1 and M2. For class D, the explicit metaclass M1 is not a subclass of the ...

  • Python Success Stories

    ...communicate with each other, or with a central base station. A great deal of mechanical, electrical, electronic and optical design is required to create these lights. As is typical of modern complex devices, an embedded software program running on a microcontroller operates each unit, making it come to life. Like a miniature version of the Monolith from 2001: A Space Odyssey, each light maintains itself, ready to perform its function whenever the need arises. The Future of Practical Computin...

  • Summary of "Extension Building" Session

    ...ce release to an archive. Or, he can create built distributions for all the architectures to which he has access. (Note that I'm explicitly avoiding use of the more familiar term binary distribution. That is because a module distribution might well contain nothing more than .py files and their associated documentation. Even in those cases, though, there are reasons for a downloadable resource that can be immediately installed. The main reason is consistency: i...

  • Unifying types and classes in Python 2.2

    ...classes class C1: __metaclass__ = M1 class C2(C1): __metaclass__ = M2 class C3(C1, C2): __metaclass__ = M3 class D(C2, C3): __metaclass__ = M1 class C4: __metaclass__ = M4 class E(C3, C4): pass For class C2, the constraint is satisfied because M2 is a subclass of M1. For class C3, it is satisfied because M3 is a subclass of both M1 and M2. For class D, the explicit metaclass M1 is not a subclass of the ...

  • Python Success Stories

    ...cs from a large stack, verifying the correctness of the number of discs using a disc counter, adding or removing discs to meet the required number, and sending the disks to a packaging machine To make the packaging process cost effective, an automatic CD/DVD disc partitioner is used to carry out the above steps. Acqutek Corporation was contracted by Micro Image Precision Co. Ltd to develop the control software for this partitioner machine. The project was time critical, with less than 4 months...

  • 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...

  • 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...

  • Release – Python 3.14.0b2

    Version: None

    Released: May 26, 2025

    Here's the second 3.14 beta. https://www.python.org/downloads/release/python-3140b2/ This is a beta preview of Python 3.14 Python 3.14 is still in development. This release, 3.14.0b2, is the first 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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  • Python 2.1 license

    ...without specific, written prior permission. STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE US...

  • Python 2.1.1 license

    ...without specific, written prior permission. STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE US...

  • Python 2.1.2 license

    ...without specific, written prior permission. STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE US...

  • Python 2.1.3 license

    ...without specific, written prior permission. STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE US...

  • What's new in Python 2.3

    ...criptors, except for __class__. raw_input() - can now return Unicode objects (if sys.stdin is Unicode-capable). (New in 2.3a2.) slice() and buffer() - these are now types rather than functions. The constructors have the same signature as the functions in the past. PyThreadState_SetAsyncEnc() - A new API (deliberately accessible only from C) to interrupt a thread by sending it an exception. New or upgraded modules and packages Many new doctest extensions from Jim Fulton, which among other e...

  • Job - Senior Full Stack Engineer

    Location: London United Kingdom

    Telecommuting: Yes

    We’re looking for a Senior Full Stack Engineer to join our Member Experience squad — a collaborative, cross-functional team dedicated to improving the experience for Lyst members (users who create an account). You’ll get to work across user personalisation, our stock and price alerts, as well as the optimisation and …

  • Release – Python 2.5.0

    Version: None

    Released: Sept. 19, 2006

    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. …

    View Release Notes

  • Python 2.5 Release

    ...c9ebc47dfab4fdc78d895ed6ab715db0 python-2.5.amd64.msi (10889216 bytes, signature) dec95012739692625939e3ec6572fa5f python-2.5.ia64.msi (12986368 bytes, signature) 9ea85494251357970d83a023658fddc7 python-2.5-macosx.dmg (18749464 bytes, signature) d8bfc10c7fd6505271ef5c755999c7cc Python25.chm (4160038 bytes, signature) The signatures above were generated with GnuPG using release manager Anthony Baxter's public key which has a key id of 6A45C816.

  • Python Success Stories

    ...class facilities. The resulting function is shown in Listing 3, and the code that calls it is in Listing 4. def copy_instance(toclass, fromdict): # Initialize a class object of given type from a conformant dictionary. class_sig = toclass.__dict__.keys(); class_sig.sort() dict_keys = fromdict.keys(); dict_keys.sort() common = intersect(class_sig, dict_keys) if 'typemap' in class_sig: class_sig.remove('typemap') if tuple(class_sig) != tuple(dict_keys): print &q...

  • Python Success Stories

    ...cate program structure was a stumbling block during this initial contact and Python was not adopted for use with that project. On second look, after actual experience with the language, the language's indentation-defined structure became a virtue, an important part of the overall power and simplicity of the language. In addition to Python's clean design, the following factors make Python a good choice for enterprise integration tasks, like those undertaken at Gusto.com: OS Independence - The ab...

  • 2011-02-28 PSF Board Meeting Minutes

    ...com/2011/01/finding-local-users-group.html For items planned for next month and ongoing projects, D. Hellmann reported respectively: Assist with publicity for PyCon. Talk with R. David Murray about the email package status and write up that project. Facebook stats for 9 Dec - 7 Jan 8,834 monthly active users 1,450 new likes 51.191 post views 274 post feedback 5.2   Core Development Tasks B. Cannon, Core Development Tasks Project, reported continued activities from last ...

  • What's New In Python 3.0

    ...code strings to deal with non-English locales. Issue #1587: Added instancemethod wrapper for PyCFunctions. The Python C API has gained a new type PyInstanceMethod_Type and the functions PyInstanceMethod_Check(o), PyInstanceMethod_New(func) and PyInstanceMethod_Function(im). Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed from the gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE are now enough to print the corresponding list of objects considered by the garbage collecto...

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