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  • 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 This article was previously published on Builder.com Introduction Software engineers have long told their bosses and clients that they can have software "fast, cheap, or right," as long as they pick any two of those factors. Getting all three? Forget about it! But United Space Alliance (USA), NASA's main shuttle support contractor, had a mandate to provide software that meets all three criteria. Their experience with Python told them NASA's demands were within...

  • Python Distutils-SIG: Design Proposal

    Python Distutils-SIG: Design Proposal Python Distutils-SIG (Prerequisites: please read the proposed interface before trying to plough through this design document; it is very much a sequel to the interface document.) Design Proposal The Distutils' point of view setup.py only has to import one module, distutils.core. This module is responsible for parsing all command-line arguments to setup.py (even though the interpretation of options is di...

  • Python Distutils-SIG: Design Proposal

    Python Distutils-SIG: Design Proposal Python Distutils-SIG (Prerequisites: please read the proposed interface before trying to plough through this design document; it is very much a sequel to the interface document.) Design Proposal The Distutils' point of view setup.py only has to import one module, distutils.core. This module is responsible for parsing all command-line arguments to setup.py (even though the interpretation of options is di...

  • 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    Debugging Reference Count Problems Warning This page stays here for historical reasons and it may contain outdated or incorrect information.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 2.5 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, ...

  • 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/...

  • 2013-11-01 PSF Board Meeting Minutes

    2013-11-01 PSF Board Meeting Minutes The Python Software Foundation Minutes of a Regular Meeting of the Board of Directors November 01, 2013 A regular meeting of the Python Software Foundation ("PSF") Board of Directors was held over Group Conference Call via phone and Internet Relay Chat beginning at 17:00 CET/ 12:00 EDT, on November 01 2013. Van Lindberg presided over the meeting. Ewa Jodlowska prepared the minutes. All votes are reported in the form "Y-N-A" (in favor...

  • 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)....

  • Python Patterns - An Optimization Anecdote

    ...compiler" optimizes most function bodies so that for local variables, no dictionary lookup is necessary, but a simple array indexing operation is sufficient. The relative speed of f4() compared to f1() and f3() suggests that both reasons why f3() is faster contribute, but that the first reason (fewer lookups) is a bit more important. (To get more precise data on this, we would have to instrument the interpreter.) Still, our best version, f3(), was only twice as fast as the most ...

  • Standard Exception Classes in Python 1.5

    Standard Exception Classes in Python 1.5 Standard Exception Classes in Python 1.5 (updated for Python 1.5.2 -baw) User-defined Python exceptions can be either strings or Python classes. Since classes have many nice properties when used as exceptions, it is desirable to migrate to a situation where classes are used exclusively. Prior to Python 1.5 alpha 4, Python's standard exceptions (IOError, TypeError, etc.) were defined as strings. Changing these to classes posed some particula...

  • Release – Python 3.12.14

    Version: None

    Released: Aug. 12, 2026

    This is a security release of Python 3.12 Note: The release you're looking at is Python 3.12.14, a security bugfix release for the legacy 3.12 series. Python 3.14 is now the latest feature release series of Python 3. Get the latest release of 3.14.x here. Security content …

    View Release Notes

  • Release – Python 3.11.16

    Version: None

    Released: Aug. 12, 2026

    This is a security release of Python 3.11 Note: The release you're looking at is Python 3.11.16, a security bugfix release for the legacy 3.11 series. Python 3.14 is now the latest feature release series of Python 3. Get the latest release of 3.14.x here. Security content …

    View Release Notes

  • Computer Programming for Everybody

    ...compiler technology may be able to eliminate part of this problem, probably in combination with some form of optional static typing. The challenge is to do this without obfuscating the programming language or making the development cycle (edit-run-debug) more tedious. Scripting languages are very good at gluing together existing components in a new way, rather than starting from scratch. One conclusion is that we need better techniques for software reuse-an issue of ongoing debate in...

  • Python 2.6.8 license

    ...compilers; removed references to Ghostscript; clarified derivation from RFC 1321; now handles byte order either statically or dynamically. 1999-11-04 lpd Edited comments slightly for automatic TOC extraction. 1999-10-18 lpd Fixed typo in header comment (ansi2knr rather than md5); added conditionalization for C++ compilation from Martin Purschke <purschke@bnl.gov>. 1999-05-03 lpd Original version. Asynchronous socket services¶ The asynchat and asynco...

  • Python 2.6.9 license

    ...compilers; removed references to Ghostscript; clarified derivation from RFC 1321; now handles byte order either statically or dynamically. 1999-11-04 lpd Edited comments slightly for automatic TOC extraction. 1999-10-18 lpd Fixed typo in header comment (ansi2knr rather than md5); added conditionalization for C++ compilation from Martin Purschke <purschke@bnl.gov>. 1999-05-03 lpd Original version. Asynchronous socket services¶ The asynchat and asynco...

  • What's new in Python 2.3

    What's new in Python 2.3 What's new in Python 2.3 Here are the (subjective) highlights of what's new in Python 2.3. Faster According to a couple of simple benchmark, Python 2.3 is about 20-30% faster than Python 2.2.3. Some of this speed-up was obtained by removing the SET_LINENO opcodes, which means that the difference is less impressive when comparing "python -O"; the rest was various careful tune-ups. New Tools A brand new version of IDLE (from the IDLEfork project at S...

  • 2007-04-09 PSF Board Meeting Minutes

    2007-04-09 PSF Board Meeting Minutes The Python Software Foundation Minutes of a Regular Meeting of the Board of Directors April 9, 2007 A regular meeting of the Python Software Foundation ("PSF") Board of Directors was held over Internet Relay Chat beginning at 17:06 UTC, 9 April 2007. Stephan Deibel presided at the meeting. David Goodger prepared these minutes. Contents 1   Attendance 2   Minutes of Past Meetings 3   Status of Pa...

  • Python Success Stories

    Python Success Stories Introducing IronPython Pairing the Python language's expressivity with the seamless availability of the extensive .NET class libraries makes IronPython a powerful combination for Resolver Systems. About Resolver Systems Resolver Systems is a two year-old start-up based on the outskirts of London's financial district. Our first product, Resolver One, is a desktop and web-accessible spreadsheet aimed primarily at the financial services market. It is written entirely in ...

  • Python Humor

    ...Compiler, et al.) has increased over the past year, the PSA felt it would be wise to licencing the Python name to forestall any lawsuits. An added benefit is that John Cleese is teaching Guido how to walk funny. (3) Pre-Release vacations are spent in the Catskills. Post-Release vacations are spent in the Bahamas. Guido is currently working on a system which will allow him to make more releases of Python; thus octupling the number of vacations he takes in a year. Well, folks, as you can see...

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