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  • Unifying types and classes in Python 2.2

    ...File "<stdin>", line 1, in ? TypeError: can't set attributes of built-in/extension type 'list' >>> list.answer = 42 Traceback (most recent call last): File "<stdin>", line 1, in ? TypeError: can't set attributes of built-in/extension type 'list' >>> list.__dict__['append'] <method 'append' of 'list' objects> >>> list.__dict__['answer'] = 42 Traceback (most recent call last): File "<stdin>", line 1, in ? TypeError: object does not support item assignment >>> class L(li...

  • Release – Python 3.7.0b5

    Version: None

    Released: May 30, 2018

    This is a beta preview of Python 3.7 Python 3.7 is still in development. This release, 3.7.0b5, is now the final planned beta release preview. Originally, 3.7.0b4 was intended to be the final beta but, due to some unexpected compatibility issues discovered during beta testing of third-party packages, …

    View Release Notes

  • Python Success Stories

    ...file format allow the deployment of Python modules to any platform, regardless of which platform the module was prepared on. This helped not only in avoiding per-platform development overhead but also facilitates customer support for the Timesheet software product. For example, a patch module built on a Redhat 6.2 system can be sent to a customer for installation on Windows XP or any other operation system without the need for cross-compilation or translation of any kind. Conclusion Python mad...

  • Python 2.7.1 Release

    ...files: 15ed56733655e3fab785e49a7278d2fb 14058131 Python-2.7.1.tgz aa27bc25725137ba155910bd8e5ddc4f 11722546 Python-2.7.1.tar.bz2 c7a750e85e632294c9b527ee8358d805 16065602 python-2.7.1-pdb.zip ef24194913837f2f542883fd52f3af99 17196098 python-2.7.1.amd64-pdb.zip c4eb466b9d01fde770097a559445e33b 16333824 python-2.7.1.amd64.msi a69ce1b2d870be29befd1cefb4615d82 16003072 python-2.7.1.msi aa399c743796a519148d08b77fab0fe7 21429186 python-2.7.1-macosx10.3.dmg 723b12ec324fafb7b4a12f102c744a...

  • Python Success Stories

    ...files can be shipped to clients regardless of target platform, making support quite easy. Speed, Scalability, and Stability When we started to write in Python, our previous experience in compiled languages led us to believe that we would be spending a fair amount of time either optimizing code or converting it into C or C++ once we had prototyped it. As it turned out, most of the time Python produced a snappy end product that didn't require any extra work. This happened partially because most ...

  • Computer Programming for Everybody

    ...file intermingled with four changes to function Z at the bottom of the file. Now the programmer discovers that function A should never have changed; selective undo allows changes to function A to be rolled back without affecting the changes to function Z. Global undo is similar to what version control provides, where system level changes can be tagged and rolled back when they adversely affect the system. Where global undo differs however is that no a-priori decision has to be made about ...

  • IDLE and tkinter with Tcl/Tk on macOS

    IDLE and tkinter with Tcl/Tk on macOS Important If you are using macOS 12 Monterey or later, you may see problems with file open and save dialogs when using IDLE or other tkinter-based applications. The most recent versions of python.org installers (for 3.10.0 and 3.9.8) have patched versions of Tk to avoid these problems. They should be fixed in an upcoming Tk 8.6.12 release. If you are using a Python from any current python.org Python installer for macOS (3.10.0+ or 3.9.0+), no further acti...

  • Glue It All Together With Python

    ...files containing function and method prototypes and automatically generates the necessary type conversion and error checking code. In situations where the underlying code (usually C code) doesn't use an object-oriented model, the glue extension can in turn be wrapped in a Python module that defines a proper class hierarchy, while delegating the performance critical operations to the C code. Using Python, better applications can be developed because different kinds of programmers can w...

  • Parade of the PEPs

    ...files too? The 't' mode conflicts with the use of this mode on Windows to be an explicit way to invoke the default text translation mode. Why can't 't' be used together with '+'? Text mode on Windows supports '+' AFAIK. How does this interact with xreadlines? With "for line in file" ? Why settle for a compile-time option that's off by default? That's asking for problems; people who turn it on will write code that uses the 't' mode and then find that it's not portable. ...

  • 2010-02-08 PSF Board Meeting Minutes

    ...file in PSF CVS with the details of the laptops and VGA2USB boxes purchased for PyCon 2008. Status: pending. [16] Originally from 14 April 2008, Section 12, Sponsor Membership Issues: D. Goodger and P. Campbell will update the member information in members.xls (sponsors & nominated members) & sponsor-addrs.txt, in PSF CVS. [Update 2009-06-19 & 2009-06-25] P. Campbell updated sponsor-addrs.txt & sent to K. Kaiser on 2009-06-19 & updated members.xls & sent to D. Goodger to...

  • PSF Trademark Usage Policy

    ...files and executables -- Allowed if used to refer to the Python programming language. Commercial users should obtain permission before using derived logos as icons for proprietary file formats. Use of derived logos for user groups and conferences -- Allowed if used to refer to the Python programming language. Commercial user groups and for-profit conferences require permission from the PSF. Use of derived logos for freely distributed 3rd-party modules or tools -- Allowed if for the Python prog...

  • 2020 PSF Annual Report

    ...file necessary trademarks for all these terms and applica- ble logos. This work helps strengthen and protect terms that are staples within our community. Our projects and established Work Groups ac- complished so much last year. PyLadies launched its new governance model. Several of our Work Groups continued their efforts including the Code of Conduct Work Group and the Scientific Work Group. The PSF’s Grants Progr...

  • Python Success Stories

    ...file system, where it could be used with our existing CVS infrastructure for source code control and reporting. EZRO was developed in Python, as a Zope Product. It interacts with other Zope Products and uses aspell as an external process for spell checking. The content management interface and published web content is provided to its users through Apache or other web server. Zoom in Implementation Development of the EZRO content management solution started with the assumption that the appli...

  • Support the PSF with a Donation or by becoming a Supporting Member!

    Support the PSF with a Donation or by becoming a Supporting Member! Donate Become a Supporting Member What does the Python Software Foundation do? The Python Software Foundation: Awards grants and provides resources for furthering the development and adoption of Python. Organizes and hosts the annual PyCon US conference. 2019 brought together 3,393 attendees from 55 countries, a new record for PyCon US! Our sponsors’ support en...

  • Python Success Stories

    ...files, or write other supporting code required in languages like C++ or Java. As a result, Python is almost executable pseudo-code. Python speeds the development cycle. Since Python code is compiled to byte code on the fly by the interpreter, the development cycle is just "edit-and-execute" instead of "edit-compile-execute". In practice, this can save substantial amounts of time. Python facilitates debugging. Python's detailed tracebacks reveal the cause of problems very qu...

  • Python Success Stories

    ...file exchange. But both of these approaches are error-prone. Catching and fixing errors as well as responding to frequent change requests can bog such a system down." Complicating the issue was the challenge of finding money to improve the flight design process in an era of declining budgets for space activities. "Just in time" provides a solution--and more problems USA decided they needed a way to "minimize data changes and the resulting rework." The shortest route to...

  • Python Software Foundation Staff

    Python Software Foundation Staff Deb Nicholson Executive Director Deb Nicholson joined the PSF in April 2022. She is an experienced non-profit professional and passionate open source community builder who has worked at the Open Source Initiative, Software Freedom Conservancy and the Open Invention Network. She is also a founding organizer of the Seattle GNU/Linux Conference, an annual event dedicated to surfacing new voices and welcoming new people to the free software community. She'l...

  • Grants - Frequently Asked Questions

    ...filed. Python conferences: If there were different organizers/or a different conference chair running the conference the previous year, please contact them to make sure a report was submitted before you submit your new grant request. This is the form grant recipients should use to submit post-event/project reports. Q. Once my grant is approved, how long does it take to receive funds? A. After you receive a notification with the amount of funding the PSF approved for your grant request and you s...

  • Python Success Stories

    ...file 'open' function with another function which simply raises an exception, a test can easily verify how the code under test reacts if it is unexpectedly unable to open a file. Distributed Testing Infrastructure Resolver Systems also uses Python extensively for their internal infrastructure, from IDE scripting to a distributed test runner, which spreads the load of running many unit and acceptance tests over however many machines in the office are currently idle. The distributed test mechanis...

  • Python Success Stories

    ...file system size further, it was not necessary for this project. Simulator A simulator was developed in the early stages of the project, before the actual machine was available. This provided the developer with a graphical animation of the movement of the spindles, air cylinders, and the status of the sensors. The simulator allowed the software developer to start building the control software before the hardware design and assembly were complete. It also acts as a convenient way to debug and s...

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