Python-announce-list February 2008

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48 participants
61 discussions

ANN: sympycore version 0.1 released
by Pearu Peterson 29 Feb '08

29 Feb '08

We are proud to present a new Python package: sympycore - an efficient pure Python Computer Algebra System Sympycore is available for download from http://sympycore.googlecode.com/ Sympycore is released under the New BSD License. Sympycore provides efficient data structures for representing symbolic expressions and methods to manipulate them. Sympycore uses a very clear algebra oriented design that can be easily extended. Sympycore is a pure Python package with no external dependencies, it requires Python version 2.5 or higher to run. Sympycore uses Mpmath for fast arbitrary-precision floating-point arithmetic that is included into sympycore package. Sympycore is to our knowledge the most efficient pure Python implementation of a Computer Algebra System. Its speed is comparable to Computer Algebra Systems implemented in compiled languages. Some comparison benchmarks are available in * http://code.google.com/p/sympycore/wiki/Performance * http://code.google.com/p/sympycore/wiki/PerformanceHistory and it is our aim to continue seeking for more efficient ways to manipulate symbolic expressions: http://cens.ioc.ee/~pearu/sympycore_bench/ Sympycore version 0.1 provides the following features: * symbolic arithmetic operations * basic expression manipulation methods: expanding, substituting, and pattern matching. * primitive algebra to represent unevaluated symbolic expressions * calculus algebra of symbolic expressions, unevaluated elementary functions, differentiation and polynomial integration methods * univariate and multivariate polynomial rings * matrix rings * expressions with physical units * SympyCore User's Guide and API Docs are available online. Take a look at the demo for sympycore 0.1 release: http://sympycore.googlecode.com/svn/trunk/doc/html/demo0_1.html However, one should be aware that sympycore does not implement many features that other Computer Algebra Systems do. The version number 0.1 speaks for itself:) Sympycore is inspired by many attempts to implement CAS for Python and it is created to fix SymPy performance and robustness issues. Sympycore does not yet have nearly as many features as SymPy. Our goal is to work on in direction of merging the efforts with the SymPy project in the near future. Enjoy! * Pearu Peterson <pearu.peterson AT gmail DOT com> * Fredrik Johansson Acknowledgments: * The work of Pearu Peterson on the SympyCore project is supported by a Center of Excellence grant from the Norwegian Research Council to Center for Biomedical Computing at Simula Research Laboratory. <P><A HREF="http://sympycore.googlecode.com/">SympyCore 0.1</A> - an efficient pure Python Computer Algebra System. (29-Feb-08)

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ikaaro 0.20.4 released
by "J. David Ibáñez" 28 Feb '08

28 Feb '08

This is a Content Management System built on Python & itools, among other features ikaaro provides: - content and document management (index&search, metadata, etc.) - multilingual user interfaces and content - high level modules: wiki, forum, tracker, etc. This release brings a number of usability enhancements. Most important, the old HTML editor derived from Epoz [1] has been replaced by TinyMCE [2]. [1] http://iungo.org/products/Epoz/ [2] http://tinymce.moxiecode.com/ Resources --------- Download http://download.ikaaro.org/ikaaro/ikaaro-0.20.4.tar.gz Home http://www.ikaaro.org/ikaaro Mailing list http://mail.ikaaro.org/mailman/listinfo/itools Bug Tracker http://bugs.ikaaro.org/ -- J. David Ibáñez Itaapy <http://www.itaapy.com> Tel +33 (0)1 42 23 67 45 9 rue Darwin, 75018 Paris Fax +33 (0)1 53 28 27 88

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dateutil 1.4
by Gustavo Niemeyer 27 Feb '08

27 Feb '08

Version 1.4 of dateutil is out: http://labix.org/python-dateutil Changes since 1.3 ----------------- - Fixed another parser precision problem on conversion of decimal seconds to microseconds, as reported by Erik Brown. Now these issues are gone for real since it's not using floating point arithmetic anymore. - Fixed case where tzrange.utcoffset and tzrange.dst() might fail due to a date being used where a datetime was expected (reported and fixed by Lennart Regebro). - Prevent tzstr from introducing daylight timings in strings that didn't specify them (reported by Lennart Regebro). - Calls like gettz("GMT+3") and gettz("UTC-2") will now return the expected values, instead of the TZ variable behavior. - Fixed DST signal handling in zoneinfo files. Reported by Nicholas F. Fabry and John-Mark Gurney. What is it? ----------- The dateutil module provides powerful extensions to the standard datetime module, available in Python 2.3+. Features -------- * Computing of relative deltas (next month, next year, next monday, last week of month, and a lot more); * Computing of relative deltas between two given date and/or datetime objects; * Computing of dates based on very flexible recurrence rules (every month, every week on Thursday and Friday, every Friday 13th, and a *LOT* more), using a superset of the iCalendar RFC specification. Parsing of RFC strings is supported as well. * Generic parsing of dates in almost any string format; * Timezone (tzinfo) implementations for tzfile(5) format files (/etc/localtime, /usr/share/zoneinfo, etc), TZ environment string (in all known formats), iCalendar format files, given ranges (with help from relative deltas), local machine timezone, fixed offset timezone, UTC timezone, and Windows registry-based timezones. * Internal up-to-date world timezone information based on Olson's database. * Computing of Easter Sunday dates for any given year, using Western, Orthodox or Julian algorithms; * More than 400 test cases. -- Gustavo Niemeyer http://niemeyer.net

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ANN: ConfigObj 4.5.2 and validate 0.3.2
by Fuzzyman 27 Feb '08

27 Feb '08

There was a bug in release 4.5.1 of ConfigObj, so there is now an updated release: * `ConfigObj 4.5.2 <http://www.voidspace.org.uk/python/ configobj.html>`_ * `Validate 0.3.2 <http://www.voidspace.org.uk/python/validate.html>`_ The bug affected the use of ``None`` as a default value in configspecs and is now fixed. What are ConfigObj and Validate? ========================= **ConfigObj** is a simple to use but powerful configuration file management library. Features include: * Nested sections to any depth * Unicode support * List and multiline values * Integrated with a powerful validation system - including automatic type checking/conversion - repeated sections - and allowing default values * All comments in a file are preserved when writing * The order of keys/sections is preserved * A powerful unrepr mode for storing basic datatypes **validate** is the module (optional) used for config file validation and type marshalling. It can be used outside of ConfigObj for matching string values against a text specification which also does type conversion. Changes in ConfigObj 4.5.x ==================== Distribution now includes validate 0.3.2 so ``None`` as a default value in configspecs works again. BUGFIX: Unicode configspecs now work. ConfigObj will now guarantee that files will be written terminated with a newline. ConfigObj will no longer attempt to import the ``validate`` module, until/unless you call ``ConfigObj.validate`` with ``preserve_errors=True``. This makes it faster to import. New methods ``restore_default`` and ``restore_defaults``. ``restore_default`` resets an entry to its default value (and returns that value). ``restore_defaults`` resets all entries to their default value. It doesn't modify entries without a default value. You must have validated a ConfigObj (which populates the ``default_values`` dictionary) before calling these methods. BUGFIX: Proper quoting of keys, values and list values that contain hashes (when writing). When ``list_values=False``, values containing hashes are triple quoted. Added the ``reload`` method. This reloads a ConfigObj from file. If the filename attribute is not set then a ``ReloadError`` (a new exception inheriting from ``IOError``) is raised. BUGFIX: Files are read in with 'rb' mode, so that native/non-native line endings work! Minor efficiency improvement in ``unrepr`` mode. Added missing docstrings for some overridden dictionary methods. Added the ``reset`` method. This restores a ConfigObj to a freshly created state. Removed old CHANGELOG file. Changes in Validate 0.3.x ================== BUGFIX: ``None`` as a default value handled correctly. BUGFIX: Unicode checks no longer broken. Improved performance with a parse cache. New ``get_default_value`` method. Given a check it returns the default value (converted to the correct type) or raises a ``KeyError`` if the check doesn't specify a default. Added 'tuple' check and corresponding 'is_tuple' function (which always returns a tuple). BUGFIX: A quoted 'None' as a default value is no longer treated as None, but as the string 'None'. BUGFIX: We weren't unquoting keyword arguments of length two, so an empty string didn't work as a default. BUGFIX: Strings no longer pass the 'is_list' check. Additionally, the list checks always return lists. A couple of documentation bug fixes. Removed CHANGELOG from module. Michael Foord

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[PyCon Italia] Call for papers
by dialUAZ###UZ#$AAtone＠gWARAmail.com 26 Feb '08

26 Feb '08

Hi everyone, we are beginning to accept papers for PyCon Italia Due, the second edition of the italian python conference. This year the conference will be held from 9th till 11th May in Florence in Italy. The first day of the conference (9th May) will start at Palazzo Vecchio in the afternoon with an opening Keynote by Richard Stallman. The next days instead the conference will be at the Viva Hotel Laurus near the Duomo. Thanks for the attention! Call for papers (http://www.pycon.it/pycon2/cfp-en) ===================================================== Papers --------- The conference is structured on three parallel tracks: Discovering Python, Spreading Python and Learning Python: * Discovering Python: will primarily focus on introductory topics about Python libraries, framework and technologies; * Spreading Python: will instead focus both on advanced technical topics and parallel arguments like development methodologies, real-world use cases and management techniques; * Learning Python: will feature a continuous interaction between the speaker and the audience: the speaker will propose a topic and introduce a possible solution, then the talk will dynamically evolve, naturally following questions and notes from the audience. Talks could focus on the following topics (the list is not exclusive neither exaustive): * vast and/or distributed applications written in Python; * scientific and computationally intensive applications; * interaction with other languages/environments, RPC, services; * web programming and web frameworks; * desktop programming and GUI toolkits; * Python as "scripting" language (system housekeeping, COM, etc...); * Python and databases; * Python as educational language; Talks will be screened on contents, relevance for Python community and overall quality. Each talk will have one of the following duration: 30', 60' or 90'. Please specify which length best fit your contents. Remember that this timeframe also includes the time for the audience to enter and leave the room. The talk must be given in either the English or the Italian language. For native English speaker, please consider that you will probably need to speak a little slower than usual for perfect comprehension of the audience, so the talk will be longer than you expect. See also the note at the end of this paper. How to submit a paper ---------------------- Your talk proposal must be submitted online through Assopy[1]. You will need to enter some biographic notes about the speaker, and an abstract of the talk (a couple of paragraphs). Note: Assopy is still Italian only; English version is coming online soon. If your talk is accepted -------------------- Once your talk proposal is approved, you'll have to submit your paper before the conference opening day. Each paper must be original work. We won't accept papers containing copyrighted material. Papers will be accepted in plain text, HTML (single page please), PostScript, PDF, ... Please use a standard format, viewable and printable on all major systems. The files must be submitted within Assopy[1]. A note for non-Italian speakers -------------------------------- We warmly welcome and encourage the presence of non-Italian speakers at PyCon Italia. Please, notice that most talks will be in Italian, though. We are planning to provide Italian-to-English realtime translation for our guests, but we cannot guarantee this yet, because of budget constraints. We would also like to provide English-to-Italian realtime translation for that part of the audience which is not much familiar with English. To help us out, please point companies you are in concact with to our sponsorship program. Thanks! [1]: http://www.pycon.it/pycon2/login -- Valentino Volonghi aka Dialtone http://stacktrace.it -- Aperiodico di resistenza informatica Blog: http://www.twisted.it/ http://iccfriends.net/friend/Dialtone

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Python-URL! - weekly Python news and links (Feb 26)
by Gabriel Genellina 26 Feb '08

26 Feb '08

QOTW: "I think not enough is made of the fact that Python combines legibility and power better than any other platform." - Michael Tobis http://mail.python.org/pipermail/advocacy/2008-February/000518.html "C++ is a compile-time, type-checked language, which means it is totally safer for newbies than Python. Yep, your big company is totally safe with newbie C++ programmers." - Carl Banks Python 2.5.2 final released: http://groups.google.com/group/comp.lang.python/browse_thread/thread/51e484… An article in CIO.com about Python in the enterprise inspires a long thread which compares Python to other languages: http://groups.google.com/group/comp.lang.python/browse_thread/thread/c1af9a… The 2007 LinuxQuestions.org Members Choice Awards selects Python as Programming Language of the Year. http://www.linuxquestions.org/questions/2007-linuxquestions.org-members-cho… Why double underscores are used internally: http://groups.google.com/group/comp.lang.python/browse_thread/thread/554c12… Function overloading (dispatching by argument type): http://groups.google.com/group/comp.lang.python/browse_thread/thread/745fd7… Globals vs Singleton: http://groups.google.com/group/comp.lang.python/browse_thread/thread/6a6909… Threads vs. Continuations: http://groups.google.com/group/comp.lang.python/browse_thread/thread/fe6b9e… "Return value" of assignment statements, plus the meaning of "variable" in Python terms: http://groups.google.com/group/comp.lang.python/browse_thread/thread/2563e7… ======================================================================== 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. Just beginning with Python? This page is a great place to start: http://wiki.python.org/moin/BeginnersGuide/Programmers The Python Papers aims to publish "the efforts of Python enthusiats": http://pythonpapers.org/ The Python Magazine is a technical monthly devoted to Python: http://pythonmagazine.com Readers have recommended the "Planet" sites: http://planetpython.org http://planet.python.org 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 Python411 indexes "podcasts ... to help people learn Python ..." Updates appear more-than-weekly: http://www.awaretek.com/python/index.html Steve Bethard continues the marvelous tradition early borne by Andrew Kuchling, Michael Hudson, Brett Cannon, Tony Meyer, and Tim Lesher 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 Although unmaintained since 2002, the Cetus collection of Python hyperlinks retains a few gems. 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 Many Python conferences around the world are in preparation. Watch this space for links to them. 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://www.python.org/dev/peps/pep-0042/ 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/topic/python/ (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!". Write to the same address to unsubscribe. -- The Python-URL! Team-- Phaseit, Inc. (http://phaseit.net) is pleased to participate in and sponsor the "Python-URL!" project. Watch this space for upcoming news about posting archives.

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ANN: Python cgkit v2.0.0alpha8
by matthias.baas＠gmail.com 25 Feb '08

25 Feb '08

The eigth alpha release of cgkit2 is available at http://cgkit.sourceforge.net What is it? ----------- The Python Computer Graphics Kit is an Open Source software package containing a collection of Python modules, plugins and utilities that are meant to be useful for any domain where you have to deal with 3D data of any kind, be it for visualization, creating photorealistic images, Virtual Reality or even games. What's new? ----------- - New module "cri" that contains a ctypes-based RenderMan binding - New module "mayabinary" to parse Maya Binary (.mb) files - Various smaller fixes and additions (see the changelog for a full list) For more information, visit: http://cgkit.sourceforge.net - Matthias -

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ANN: Pygoo 0.1 released
by Simon Forman 25 Feb '08

25 Feb '08

Pygoo alpha 0.1 released. Pygoo is a SPARK [1] parser that generates ElementTree representations of Tkinter widget specifications which are then fed to a modified version of effbot's XML-to-Tkinter function [2] to render actual widgets. You can use it to create Tkinter widgets without having to build them programatically. There is also provision for automatically connecting callbacks to the widgets. I made this for another project, but I thought it might be interesting or useful enough for others so I cleaned it up a bit and am releasing it to the public on the GPL. If you check it out please let me know what you think. (Feel free to file issues on the googlecode site.) There are some demos bundled with the source, that and the language spec on the googlecode wiki should get you started. http://www.pygoo.com/ http://code.google.com/p/pygoo/ http://pygoo.googlecode.com/files/pygoo-0.1.tgz http://code.google.com/p/pygoo/wiki/LittleLanguageSyntax [1] http://pages.cpsc.ucalgary.ca/~aycock/spark/ [2] http://effbot.org/zone/element-tkinter.htm

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Announce: Linux Desktop (GUI Application) Testing Project - LDTP 1.0.0 release
by Nagappan A 24 Feb '08

24 Feb '08

Hi, We are proud to announce the release of LDTP 1.0.0. This release features number of important breakthroughs in LDTP as well as in the field of Test Automation. This release note covers a brief introduction on LDTP followed by the list of new features and major bug fixes which makes this new version of LDTP the best of the breed. Useful references have been included at the end of this article for those who wish to hack / use LDTP. About LDTP ========== Linux Desktop (GUI Application) Testing Project is aimed at producing high quality test automation framework (C / Python) and cutting-edge tools that can be used to test Linux Desktop and improve it. It uses the Accessibility libraries to poke through the application's user interface. The framework also has tools to record test-cases based on user events in the interface of the application which is under testing. We strive to help in building a quality desktop. Whats new in this release... ============================ * Object Oriented LDTP. * LDTP Editor (Record / Replay). * Other major bug fixes. * LDTP documentation has been majorly updated. Download source tarball - http://download.freedesktop.org/ldtp/1.x/1.0.x/ldtp-1.0.0.tar.gz LDTP Binary - OpenSuSE 10.2, 10.3, Factory, Fedora 6, 7, 8, RHEL 5, CentOS 5 (x86, x86_64) - http://download.freedesktop.org/ldtp/1.x/1.0.x/ or http://download.opensuse.org/repositories/home:/anagappan/ LDTP news ========= * Joshua did a wonderful job of "Create desktop testing suite" using LDTP as part of Google Highly Open Participation GNOME 2007 under GNOME organization - http://code.google.com/p/google-highly-open-participation-gnome/issues/deta… Credit ====== Prasad of Evolution QA team, tested LDTP editor extensively and reported all the issues he faced. Evolution team is using LDTP editor for generating test scripts. Initial code LDTP editor was developed by Thanumalayan <madthanu(a)gmail.com> and Vinod Kumar <vinod.gre(a)gmail.com>. LDTP team appreciate their contributions. References ========== For detailed information on LDTP framework and latest updates visit http://ldtp.freedesktop.org For information on various APIs in LDTP including those added for this release can be got from http://ldtp.freedesktop.org/user-doc/index.html To subscribe to LDTP mailing lists, visit http://ldtp.freedesktop.org/wiki/Mailing_20list IRC Channel - #ldtp on irc.freenode.net Thanks Nagappan -- Linux Desktop (GUI Application) Testing Project - http://ldtp.freedesktop.org http://nagappanal.blogspot.com

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[ANN] Shed Skin (restricted) Python-to-C++ compiler 0.0.27
by Mark Dufour 24 Feb '08

24 Feb '08

Hi all, I have just released Shed Skin 0.0.27. Thanks in large part to the GHOP students, this new release comes with some interesting new goodies: - support for 're', via libpcre (perl-compatible-regular-expressions) - support for 'time' (except for time.strptime under Windows) - basic support for 'staticmethod' and 'property' - support for 'fnmatch', 'glob' (bootstrapped) - improved support for 'os' (POSIX) - OSX support again (including extension modules!) - many fixes for multi-dir/multi-file projects - several builtin optimizations (zip, list(str)..) - type model for 'datetime' (no C++ implementation yet) - split up compiler core, ss.py, into several files - many minor bugfixes As for the 4 new modules (re, time, fnmatch, glob), this means Shed Skin now supports most of the following modules: bisect collections copy fnmatch getopt glob math os os.path random re string sys time I could still really use some help with implementing/bootstrapping implementations for 'datetime' and 'socket', and further improving 'os' (especially under Windows). Note that since the previous release we have a nice tutorial online. It explains in detail how to install and use Shed Skin, how to use it to build (simple) extension modules and how to combine Shed Skin with numpy and parallel processing solutions such as Parallel Python. Thanks, Mark Dufour. -- "One of my most productive days was throwing away 1000 lines of code" - Ken Thompson

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Python-announce-list February 2008