Mailman 3 September 2005 - Python-announce-list

Zope 3.1.0 RC 3 released!
by Stephan Richter Sept. 16, 2005

Sept. 16, 2005

The Zope 3 development team is proud to announce Zope 3.1.0 candidate 3. Zope 3 is the next major Zope release and has been written from scratch based on the latest software design patterns and the experiences of Zope 2. It is in our opinion that Zope 3.1 is more than ready for production use, which is why we decided to drop the 'X' for experimental from the name. We will also continue to work on making the transition between Zope 2 and Zope 3 as smooth as possible. As a first step, Zope 2.8 includes Zope 3 features in the form of Five. Now that we have a release that we would like to declare stable next week, we are looking for translators, who translate Zope 3 into their favorite language! We are utilizing the Rosetta system from Ubuntu for managing those translations. If you are not familiar with Rosetta, please send us a mail to zope3-dev(a)zope.org and we get you set up. Downloads http://zope.org/Products/Zope3/ Installation instructions for both Windows and Un*x/Linux are now available in the top level 'README.txt' file of the distribution. The binary installer is recommended for Windows. Zope 3.1 requires Python 2.3.5 or 2.4.1 to run. You must also have zlib installed on your system. Changes Since 3.1.0c2 - Fixed several bugs that were considered critical. * Ported Stuart Bishop's work in ``pytz`` and ``zope.i18n`` to address broken and misleading timezone code (i.e., one issue was broken and another was misleading). * Fixed apidoc to handle extended paths, so that zope packages could be installed in software instances without apidoc losing knowledge of the core zope code. * Added custom ``executemany()`` method for cursors created through GadflyAdapter. See http://www.zope.org/Collectors/Zope3-dev/445 for discussion. - Updated ZODB to 3.5.1b2. Most Important Changes Since 3.0 - New Pluggable Authentication Utility (PAU), which is similar in philosophy to the Zope 2 PAS. The following features are available in the in the basic PAU facility: + Credentials Plugins: Basic HTTP Auth, Session + Authenticator Plugins: Principal Folder, Group Folder For a detailed description of the pluggable authentication utility, see 'zope/app/authentication/README.txt'. - Major simplifications to the component architecture: + Removal of the concept of a service. All outstanding services were converted to utilities: Error Reporting, FSSync, Authentication. + Site Managers are global and local now; adapters and utilties are directly registered with the site manager. Now global and local component registration and lookup behaves very similar. + Local registrations can now only have two states: active and inactive. This simplified the code so much, that 'zope.app.utility', 'zope.app.registration' and 'zope.app.site' were all merged into 'zope.app.component'. + Implemented menus as utilities. The API also supports sub-menus now. + Implemented views as adapters. Skins and layers are now simply interfaces that the request provides. - Added an integer-id facility for assigning integer identifiers to objects. - Added basic catalog and index frameworks. - Added "sources", which are like vocabularies except that they support very large collections of values that must be searched, rather than browsed. - Created a new granting UI that allows advanced searching of principal sources. - Implemented a generic user preferences systsem that was designed to be easily used in TALES expressions and via Python code. Preferences can be edited via 'http://localhost:8080/++preferences++/'. A demo of the preferences can be found at:: http://svn.zope.org/Zope3/trunk/src/zope/app/demo/skinpref/ - ZCML now supports conditional directives using the 'zcml:condition' attribute. The condition is of the form "verb argument". Two verbs, 'have feature' and 'installed module' are currently implemented. Features can be declared via the 'meta:provides' directive. - Improved API doctool: Code Browser now shows interfaces, text files and ZCML files; the new Book Module compiles all available doctext files into an organized book; the new Type Module lets you browser all interface types and discover interfaces that provide types; views are shown in the interface details screen; views and adapters are categorized into specific, extended and generic; user preferences allow you to customize certain views; 3rd party modules can now be added to the Code Browser. - Improved I18n-based number and datetime formatting by integrating 'pytz' for timezone support, implementing all missing format characters, and reinterpreting the ICU documentation to correctly parse patterns. - Added '++debug++' traversal adapter that allows you to turn on debugging flags in 'request.debug'. Currently the following flags are defined: source, tal, errors. - Improved logout support. - Added the HTTP request recorder, which lets you inspect raw HTTP requests and responses. It can be used to create functional doctests without requiring third-party tools such as TCPWatch. - Developed a generic 'browser:form' directive. It is pretty much the same as the 'browser:editform' directive, except that the data is not stored on some context or adapted context but sent as a dictionary to special method (by default). For a complete list of changes see the 'CHANGES.txt' file. Resources - "Zope 3 Development Web Site":http://dev.zope.org/Zope3 - "Zope 3 Dev Mailing List":http://mail.zope.org/mailman/listinfo/zope3-dev - "Zope 3 Users Mailing List":http://mail.zope.org/mailman/listinfo/zope3-users - IRC Channel: #zope3-dev at irc.freenode.net Acknowledgments Thanks goes to everyone that contributed. Enjoy! The Zope 3 Development Team

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ANN: QuiX Sampler v0.1 released
by t.koutsovassilis＠gmail.com Sept. 16, 2005

Sept. 16, 2005

QuiX Sampler is a simple Porcupine application that demostrates all the available web widgets implemented, grouped by relevance. It is an excelent introduction to QuiX fundamentals. This release include many widget variations and a couple of simple event handlers. For more, see http://www.innoscript.org/content/view/33/2/ Resources ========= What is Porcupine? http://www.innoscript.org/content/view/30/42/ Porcupine online demo: http://www.innoscript.org/content/view/21/43/ Developer resources: http://www.innoscript.org/component/option,com_remository/Itemid,33/func,se…

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curvepulator 0.1 for Blender Python published
by antont＠kyperjokki.fi Sept. 16, 2005

Sept. 16, 2005

The initial release of 'curvepulator' (working name), a tool for creating animatable 3d curves in Blender Python, is demonstrated at and available via http://orange.blender.org/blog/generating-shapes-with-animatable-curves It is made to be used in this specific film production, but hopefully also usable for other things too. Although it is Blender specific, it is still all Python. Suggestions and comments would be very welcome. In the future, we might even see procedural modelling helper libraries etc. that work in different environments. So I hope there is interest for this in the wider Python community. ~Toni

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ANN: Pyrex 0.9.3.1
by Greg Ewing Sept. 15, 2005

Sept. 15, 2005

Giovanni Bajo has put together a Pyrex release incorporating patches to address the Python 2.4 distutils compatibility problem and the GCC 4 lvalue cast problem. http://www.cosc.canterbury.ac.nz/~greg/python/Pyrex/ Thanks to Giovanni for filling a gap until I can get back to working on Pyrex again. What is Pyrex? -------------- Pyrex is a new language for writing Python extension modules. It lets you freely mix operations on Python and C data, with all Python reference counting and error checking handled automatically. -- Greg Ewing, Computer Science Dept, University of Canterbury, Christchurch, New Zealand http://www.cosc.canterbury.ac.nz/~greg

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pybwidget release 0.1.2
by jepler＠unpythonic.net Sept. 15, 2005

Sept. 15, 2005

pybwidget is a Python wrapper around the 'bwidget' family of widgets for Tkinter. It includes these classes: Entry Label Button ArrowButton ProgressBar ScrollView Separator MainFrame LabelFrame TitleFrame PanelFrame ScrolledWindow ScrollableFrame PanedWindow ButtonBox PagesManager NoteBook Dialog StatusBar LabelEntry ComboBox SpinBox Tree ListBox MessageDialog ProgressDialog PasswordDialog SelectFont SelectColor I know it's been a long time, but I've finally gotten around to making a new release of pybwidget, called 0.1.2_1.7.0. It has all the fixes I could find that have been mentioned in the tkinter-discuss mailing list archives. Compared to 0.1.1, here's a summary of changes: * add ROOT as a module-level constant, as requested * bindtabs, bind_image, bind_text all handle the 'func' parameter properly * several instances of 'self.tl' corrected to 'self.tk' * the 'nodes' function of the Tree widget now passes all arguments to Tk * The xbm-format images are installed by setup.py * how to run setup.py is mentioned in README.html This release is available at http://tkinter.unpythonic.net/bwidget Please report your experiences, good or bad, on the Tkinter mailing list tkinter-discuss(a)python.org Jeff Epler jepler(a)unpythonic.net

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CFP: PyCon 2006
by A.M. Kuchling Sept. 14, 2005

Sept. 14, 2005

PyCon 2006 Call for Proposals -------------------------------------------- Want to share your expertise? PyCon 2006 is looking for proposals to fill the formal presentation tracks. PyCon 2006 will be held February 24-26 2006 in Addison, Texas (near Dallas). Previous PyCons have had a broad range of presentations, from reports on academic and commercial projects to tutorials and case studies, and we hope to continue that tradition this year. As long as the presentation is interesting and potentially useful to the Python community, it will be considered for inclusion in the program. For 2006, we're especially interested in tutorial presentations that will teach conference-goers something new and useful. Can you show attendees how to: use a module? explore a Python language feature? package an application? Important Dates ====================== * Submission deadline: October 31, 2005 * Acceptance deadline: November 15, 2005 * Electronic copy deadline: February 15, 2006 PyCon Topics ======================= Suitable topics for PyCon presentations include, but are not limited to: * Core Python * Other implementations: Jython, IronPython, PyPy, and Stackless * Python libraries and extensions * Databases * Documentation * GUI Programming * Game Programming * Network Programming * Open Source Python projects * Packaging Issues * Programming Tools * Project Best Practices * Embedding and Extending * Science and Math * Web-based Systems Submission Format ================================ Proposals should be 250 to 1000 words long (i.e., one to four pages in manuscript format), containing the following information: * Author name(s) * Contact Information * Requested timeslot (30 minutes, 45 minutes, or either) * Summary of proposed presentation * Presentation outline * Intended audience (non-programmers, beginning programmers, advanced users, CPython developers, etc.) ASCII format is preferred (plain or reST), with HTML as a secondary alternative. If you have any queries about submission, or if you would like to discuss the possibility of submitting in a different format or style, please send mail to the conference organizers at pycon(a)python.org. Session lengths include time for audience questions. You should budget at least five minutes for questions; for example, a 30-minute talk will be 25 minutes of presentation and 5 minutes of questions. The preferred length for talks is 30 minutes. You can request a 45-minute slot, but proposals requiring 45 minutes will be reviewed more stringently and tutorial talks will be preferred for these longer slots. Submission Mechanics =============================== Use the PyCon Online Proposal Submission <http://submit.pycon.org> to send us your proposals and ideas. If your proposal is accepted, you have the option of including a companion paper along with your presentation. The paper will get published on the PyCon web site. Presentations and papers may be in text (plain or reST), HTML, or PDF; HTML or text are preferred. We suggest, but do not require, that authors place their papers under a Creative Commons license. Please visit the CC 'Choose a License' page to select a license that meets your requirements. A Wiki page has suggestions and advice for speakers: http://wiki.python.org/moin/PyCon2006/SpeakerNotes Other Presentations =========================== If you don't want to make a formal presentation, you can still bring your new project or idea to PyCon. There will be several Lightning Talk sessions for talks no longer than five minutes. There will be a significant amount of Open Space for informal and spur-of-the-moment presentations. Open Space consists of thirty-minute blocks that are allocated during PyCon. These blocks can be used for presentations, round table discussions, hands-on tutorials, or anything else. Typically, people propose ideas for the sessions which are then voted on by attendees.

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ANN: PyTables 1.1.1 released
by Francesc Altet Sept. 14, 2005

Sept. 14, 2005

========================== Announcing PyTables 1.1.1 ========================== This is a maintenance release of PyTables. In it, several optimizations and bug fixes have been made. As some of the fixed bugs were quite important, it's strongly recommended for users to upgrade. Go to the PyTables web site for downloading the beast: http://pytables.sourceforge.net/ or keep reading for more info about the improvements and bugs fixed. Changes more in depth ===================== Improvements: - Optimized the opening of files with a large number of objects. Now, files with table objects open a 50% faster, and files with arrays open more than twice as fast (up to 2000 objects/s on a Pentium 4@2GHz). Hence, a file with a combination of both kinds of objects opens between a 50% and 100% faster than in 1.1. - Optimized the creation of ``NestedRecArray`` objects using ``NumArray`` objects as columns, so that filling a table with the ``Table.append()`` method achieves a performance similar to PyTables pre-1.1 releases. Bug fixes: - ``Table.readCoordinates()`` now converts the coords parameter into ``Int64`` indices automatically. - Fixed a bug that prevented appending to tables (though ``Table.append()``) using a list of ``NumArray`` objects. - ``Int32`` attributes are handled correctly in 64-bit platforms now. - Correction for accepting lists of numarrays as input for ``NestedRecArrays``. - Fixed a problem when creating rank 1 multi-dimensional string columns in ``Table`` objects. Closes SF bug #1269023. - Avoid errors when unpickling objects stored in attributes. See the section ``AttributeSet`` in the reference chapter of the User's Manual for more information. Closes SF bug #1254636. - Assignment for ``*Array`` slices has been improved in order to solve some issues with shapes. Closes SF bug #1288792. - The indexation properties were lost in case the table was closed before an index was created. Now, these properties are saved even in this case. Known bugs: - Classes inheriting from ``IsDescription`` subclasses do not inherit columns defined in the super-class. See SF bug #1207732 for more info. - Time datatypes are non-portable between big-endian and little-endian architectures. This is ultimately a consequence of a HDF5 limitation. See SF bug #1234709 for more info. Backward-incompatible changes: - None (that we are aware of). Important note for MacOSX users =============================== UCL compressor works badly on MacOSX platforms. Recent investigation seems to point to a bug in the development tools in MacOSX (Panther). Until the problem is isolated and eventually solved, UCL support will not be compiled by default on MacOSX platforms, even if the installer finds it in the system. However, if you still want to get UCL support on MacOSX, you can use the ``--force-ucl`` flag in ``setup.py``. Important note for Python 2.4 and Windows users =============================================== If you are willing to use PyTables with Python 2.4 in Windows platforms, you will need to get the HDF5 library compiled for MSVC 7.1, aka .NET 2003. It can be found at: ftp://ftp.ncsa.uiuc.edu/HDF/HDF5/current/bin/windows/5-164-win-net.ZIP Users of Python 2.3 on Windows will have to download the version of HDF5 compiled with MSVC 6.0 available in: ftp://ftp.ncsa.uiuc.edu/HDF/HDF5/current/bin/windows/5-164-win.ZIP What it is ========== **PyTables** is a package for managing hierarchical datasets and designed to efficiently cope with extremely large amounts of data (with support for full 64-bit file addressing). It features an object-oriented interface that, combined with C extensions for the performance-critical parts of the code, makes it a very easy-to-use tool for high performance data storage and retrieval. PyTables runs on top of the HDF5 library and numarray (Numeric is also supported) package for achieving maximum throughput and convenient use. Besides, PyTables I/O for table objects is buffered, implemented in C and carefully tuned so that you can reach much better performance with PyTables than with your own home-grown wrappings to the HDF5 library. PyTables sports indexing capabilities as well, allowing doing selections in tables exceeding one billion of rows in just seconds. Platforms ========= This version has been extensively checked on quite a few platforms, like Linux on Intel32 (Pentium), Win on Intel32 (Pentium), Linux on Intel64 (Itanium2), FreeBSD on AMD64 (Opteron), Linux on PowerPC and MacOSX on PowerPC. For other platforms, chances are that the code can be easily compiled and run without further issues. Please, contact us in case you are experiencing problems. Resources ========= Go to the PyTables web site for more details: http://pytables.sourceforge.net/ About the HDF5 library: http://hdf.ncsa.uiuc.edu/HDF5/ About numarray: http://www.stsci.edu/resources/software_hardware/numarray To know more about the company behind the PyTables development, see: http://www.carabos.com/ Acknowledgments =============== Thanks to various the users who provided feature improvements, patches, bug reports, support and suggestions. See THANKS file in distribution package for a (incomplete) list of contributors. Many thanks also to SourceForge who have helped to make and distribute this package! And last but not least, a big thank you to THG (http://www.hdfgroup.org/) for sponsoring many of the new features recently introduced in PyTables. Share your experience ===================== Let us know of any bugs, suggestions, gripes, kudos, etc. you may have. ---- **Enjoy data!** -- The PyTables Team

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Sydney Python Meeting - Thursday 15 September
by Alan Green Sept. 14, 2005

Sept. 14, 2005

Our Sydney Python meeting will be Thursday 15 September (tomorrow night) at the James Squire Hotel. Dylan Jay will be presenting "Plone for Python Programmers", in which he introduces Zope and Archetypes (http://plone.org/documentation/archetypes). Date: Thursday September 15 Time: 6:30-7:00pmish onwards Place: James Squires Brewhouse 2 The Promenade, King St Wharf Sydney Fee: $0.00 All welcome, Alan.

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Dr. Dobb's Python-URL! - weekly Python news and links (Sep 13)
by Diez B. Roggisch Sept. 13, 2005

Sept. 13, 2005

QOTW: "In my view, the doctrinaire', indeed religious, adherence to OO purity has harmed our discipline considerably. Python was a nice breath of fresh air when I discovered it exactly because it does not have this slavish committment to an exclusively OO model." -- Tim Daneliuk "[W]hen you add an item to the canvas, it's part of the canvas until you remove it. if performance drops, it's usually because you keep adding new items without removing the old ones." -- Fredrik Lundh An interesting CS puzzle that even provokes the interest of legendary bots: http://groups.google.com/group/comp.lang.python/msg/892850b258423549 If you ever wanted to know how to fake network connection troubles without pulling the ethernet cable or dumping your access point in the bathtub - here you go: http://groups.google.com/group/comp.lang.python/msg/4c74934e88809a3a There's a new compiler for python in town - you static typed languages better watch out - we're getting closer! http://groups.google.com/group/comp.lang.python/msg/130e711203d12acb Django gets lots of attention lately - but is it on par with ruby-on-rails already? Find out for yourself: http://groups.google.com/group/comp.lang.python/browse_thread/thread/e827f7… Lots of movement on the "easy-packaging and installing"-front. py2exe and PyInstaller have new versions out: http://groups.google.com/group/comp.lang.python/msg/29bb876093c78e64 http://groups.google.com/group/comp.lang.python/msg/698dcaf909ce3bac Reluctant to share your little secrets? Here is how to utilize python for encryption: http://groups.google.com/group/comp.lang.python/msg/da511dc9cb4921c Ever felt the need for nice new wheels? Stefano Masini provokes a discussion on why so many people seem to keep reinventing them with python: http://groups.google.com/group/comp.lang.python/msg/e652d2f771a49857 Shaving of milliseconds on loops in python is an uncommon need - but if it arises in, for example, a game loop, here are tips on how to do so: http://groups.google.com/group/comp.lang.python/msg/8c988e2b5991a4a1 ======================================================================== Everything Python-related you want is probably one or two clicks away in these pages: Python.org's Python Language Website is the traditional center of Pythonia http://www.python.org Notice especially the master FAQ http://www.python.org/doc/FAQ.html PythonWare complements the digest you're reading with the marvelous daily python url http://www.pythonware.com/daily Mygale is a news-gathering webcrawler that specializes in (new) World-Wide Web articles related to Python. http://www.awaretek.com/nowak/mygale.html While cosmetically similar, Mygale and the Daily Python-URL are utterly different in their technologies and generally in their results. For far, FAR more Python reading than any one mind should absorb, much of it quite interesting, several pages index much of the universe of Pybloggers. http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog http://www.planetpython.org/ http://mechanicalcat.net/pyblagg.html comp.lang.python.announce announces new Python software. Be sure to scan this newsgroup weekly. http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce Steve Bethard, Tim Lesher, and Tony Meyer continue the marvelous tradition early borne by Andrew Kuchling, Michael Hudson and Brett Cannon of intelligently summarizing action on the python-dev mailing list once every other week. http://www.python.org/dev/summary/ The Python Package Index catalogues packages. http://www.python.org/pypi/ The somewhat older Vaults of Parnassus ambitiously collects references to all sorts of Python resources. http://www.vex.net/~x/parnassus/ Much of Python's real work takes place on Special-Interest Group mailing lists http://www.python.org/sigs/ Python Success Stories--from air-traffic control to on-line match-making--can inspire you or decision-makers to whom you're subject with a vision of what the language makes practical. http://www.pythonology.com/success The Python Software Foundation (PSF) has replaced the Python Consortium as an independent nexus of activity. It has official responsibility for Python's development and maintenance. http://www.python.org/psf/ Among the ways you can support PSF is with a donation. http://www.python.org/psf/donate.html Kurt B. Kaiser publishes a weekly report on faults and patches. http://www.google.com/groups?as_usubject=weekly%20python%20patch Cetus collects Python hyperlinks. http://www.cetus-links.org/oo_python.html Python FAQTS http://python.faqts.com/ The Cookbook is a collaborative effort to capture useful and interesting recipes. http://aspn.activestate.com/ASPN/Cookbook/Python Among several Python-oriented RSS/RDF feeds available are http://www.python.org/channews.rdf http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi http://python.de/backend.php For more, see http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all The old Python "To-Do List" now lives principally in a SourceForge reincarnation. http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse http://python.sourceforge.net/peps/pep-0042.html The online Python Journal is posted at pythonjournal.cognizor.com. editor(a)pythonjournal.com and editor(a)pythonjournal.cognizor.com welcome submission of material that helps people's understanding of Python use, and offer Web presentation of your work. del.icio.us presents an intriguing approach to reference commentary. It already aggregates quite a bit of Python intelligence. http://del.icio.us/tag/python *Py: the Journal of the Python Language* http://www.pyzine.com Archive probing tricks of the trade: http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100 http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.pyth… Previous - (U)se the (R)esource, (L)uke! - messages are listed here: http://www.ddj.com/topics/pythonurl/ (requires subscription) http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&s… http://purl.org/thecliff/python/url.html (dormant) or http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lan… There is *not* an RSS for "Python-URL!"--at least not yet. Arguments for and against are occasionally entertained. Suggestions/corrections for next week's posting are always welcome. E-mail to <Python-URL(a)phaseit.net> should get through. To receive a new issue of this posting in e-mail each Monday morning (approximately), ask <claird(a)phaseit.net> to subscribe. Mention "Python-URL!". -- The Python-URL! Team-- Dr. Dobb's Journal (http://www.ddj.com) is pleased to participate in and sponsor the "Python-URL!" project.

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Pythonutils 0.2.2 , ConfigObj 4.0.0 Beta 5, odict 0.1.1
by Fuzzyman Sept. 13, 2005

Sept. 13, 2005

The response to pythonutils__ was very good. Especially the odict__ module (ordered dictionary) - it's had over one hundred and fifty downloads already. Thanks to some useful user feedback, Nicola Larosa has updated and improved it. More embarassingly we've done a bugfix release of ConfigObj__ - now up to beta 5. This fixes another couple of bugs - we aim to get out of beta someday...... All this is my way of saying that *odict 0.1.2*, *pythonutils 0.2.2*, and *ConfigObj beta 5*, are all available from the `Voidspace Modules`__ page. __ http://www.voidspace.org.uk/python/pythonutils.html __ http://www.voidspace.org.uk/python/odict.html __ http://www.voidspace.org.uk/python/configobj.html __ http://www.voidspace.org.uk/python/modules.shtml (The pythonutils update contains odict 0.1.1 *and* ConfigObj Beta 5) All the best, Fuzzyman http://www.voidspace.org.uk/python/

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