Mailman 3 October 2009 - Python-announce-list

luban, a generic (web/native) user interface builder. version: 0.2a2
by Jiao Lin Oct. 26, 2009

Oct. 26, 2009

The luban package (http://luban.danse.us) is a python-based, cross- platform user interface builder. It provides UI developers a generic language to describe a user interface, and the description can be rendered as web or native interfaces. Gongshuzi, an application built by using luban, can help users visually develop UIs and run the UIs as web or native applications. Please view this demo: http://docs.danse.us/pyre/luban/sphinx/tutorials/video/gongshuzidemo.html More Demos: http://docs.danse.us/pyre/luban/sphinx/Introduction.html#demos What is new since last release? http://docs.danse.us/pyre/luban/sphinx/History.html#changes-0-2a2 More links: * Documentation: http://docs.danse.us/pyre/luban/sphinx * Installation: http://docs.danse.us/pyre/luban/sphinx/Installation.html * Tutorials: http://docs.danse.us/pyre/luban/sphinx/Tutorials.html * API: http://docs.danse.us/pyre/luban/sphinx/API.html -- Jiao Lin linjiao(a)caltech.edu

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Tryton 1.4 is available
by ced Oct. 26, 2009

Oct. 26, 2009

Tryton is a three-tiers high-level general purpose application platform under the license GPL-3 written in Python and using PostgreSQL as database engine. It is the core base of a complete business solution providing modularity, scalability and security. This new series comes up with new modules, security and performance improvements as well as the SQLite support and welcomes the arrival of Neso, the standalone version of Tryton. As usual, database migration is completely automated (and works on databases created with both the 1.0 and 1.2 series). Most of bugfixes from the last 6 months of developments have already been backported in the 1.0 and 1.2 series. The most noteworthy new features are: - The add of SQLite support as DBMS - The Neso standalone version of Tryton - The cache improvement on the server thus ensuring that each record is read at most once in the same transaction - Wizards optionally preserve their sizes from successive calls - The new filters "Starts with" and "Ends with" on fields containing strings - The reload of modules if files have changed - CalDAV for calendar management and CardDAV for contact management - LDAP authentication - Project management - The possibility to define sale price list per party. A more complete list of the new features on: http://www.tryton.org/news.html :Homepage: http://www.tryton.org/ :Downloads: http://www.tryton.org/downloads.html :Screenshots: http://www.tryton.org/screenshots.html :Demo: http://www.tryton.org/demo.html

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Python-URL! - weekly Python news and links (Oct 25)
by Gabriel Genellina Oct. 25, 2009

Oct. 25, 2009

QOTW: "It was intended to be understood, not copied." - Dave Angel comments on a characteristic of didactic examples http://groups.google.com/group/comp.lang.python/msg/61e2d60d08f1c630 Altering the default character encoding (sys.setdefaultencoding) is never a good idea: ^://groups.google.com/group/comp.lang.python/t/ecc3671082f897b4/ How come id() returns the same thing for different objects? ^://groups.google.com/group/comp.lang.python/t/bc09c37fc40059ac/ Some iterators share state, while others don't - why? ^://groups.google.com/group/comp.lang.python/t/d463230d1752aa7f/ sum(list_of_strings) is explicitely forbidden - why? ^://groups.google.com/group/comp.lang.python/t/f3c0fba5305e11e2/ Neither __getattribute__ nor metaclasses can be used to implement __special__ methods: ^://groups.google.com/group/comp.lang.python/t/f0a5aeb35f946f80/ How to compute a running median efficiently: ^://groups.google.com/group/comp.lang.python/t/d0e011c87174c2d0/ Several details on how str.split() works are not adequately documented: ^://groups.google.com/group/comp.lang.python/t/26dff8570a79067d/ How to implement a set that uses a custom function to determine element membership (not the element's __eq__): ^://groups.google.com/group/comp.lang.python/t/7eb4d6db8556f870/ Generators explained as simply as possible: ^://groups.google.com/group/comp.lang.python/t/70a954d0e034b84c/ Proposal to add slice notation [start:stop:step] to iterators/generators: ^://groups.google.com/group/comp.lang.python/t/440076d71746f8cf/ An encoding problem involves an XML document, HTTP headers, and Google servers: ^://groups.google.com/group/comp.lang.python/t/885c62699b434d25/ The `while True:` idiom makes the longest thread so far: ^://groups.google.com/group/comp.lang.python/t/46a2082b2e2c991c/ "Homework" questions: what should be our reaction? ^://groups.google.com/group/comp.lang.python/t/f7a8c5107e9d27bf/ Why is python so sad :( ? ^://groups.google.com/group/comp.lang.python/t/60c39c1ab1b39ef9/ Guido's proposes to freeze language grammar and semantics for several years: ^://comments.gmane.org/gmane.comp.python.ideas/6282 ======================================================================== 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 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 enthusiasts": http://pythonpapers.org/ The Python Magazine is a technical monthly devoted to Python: http://pythonmagazine.com Readers have recommended the "Planet" site: http://planet.python.org comp.lang.python.announce announces new Python software. Be sure to scan this newsgroup weekly. http://groups.google.com/group/comp.lang.python.announce/topics Python411 indexes "podcasts ... to help people learn Python ..." Updates appear more-than-weekly: http://www.awaretek.com/python/index.html The Python Package Index catalogues packages. http://www.python.org/pypi/ 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/donations/ The Summary of Python Tracker Issues is an automatically generated report summarizing new bugs, closed ones, and patch submissions. http://search.gmane.org/?author=status%40bugs.python.org&group=gmane.comp.p… 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://code.activestate.com/recipes/langs/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, see: http://www.python.org/channews.rdf 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/ 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 Enjoy the *Python Magazine*. http://pymag.phparch.com/ *Py: the Journal of the Python Language* http://www.pyzine.com Dr.Dobb's Portal is another source of Python news and articles: http://www.ddj.com/TechSearch/searchResults.jhtml?queryText=python and Python articles regularly appear at IBM DeveloperWorks: http://www.ibm.com/developerworks/search/searchResults.jsp?searchSite=dW&se… Previous - (U)se the (R)esource, (L)uke! - messages are listed here: http://search.gmane.org/?query=python+URL+weekly+news+links&group=gmane.com… http://groups.google.com/groups/search?q=Python-URL!+group%3Acomp.lang.pyth… http://lwn.net/Search/DoSearch?words=python-url&ctype3=yes&cat_25=yes 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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probility sequencing language 1.02
by edexter Oct. 24, 2009

Oct. 24, 2009

probability sequencing language 1.02 has been released. psl is a text based piano roll language that is inspired by the probability in jeskola buzz, but with more control than you can get in a midi based envirement. every note has a percentage chance of hitting or it is marked with an x. The frequency on the roll is entirely up to the user. support for decimals has been added to 1.02. http://dexrowem.blogspot.com/search?q=probility+sequencing+language

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[ANN] python-daemon 1.5.2
by Ben Finney Oct. 24, 2009

Oct. 24, 2009

Howdy all, I'm pleased to announce the release of version 1.5.2 of ‘python-daemon’. What is python-daemon ===================== The ‘python-daemon’ library is the reference implementation of PEP 3143 <URL:http://www.python.org/dev/peps/pep-3143/>, “Standard daemon process library”. The source distribution is available via the PyPI page for this version, <URL:http://pypi.python.org/pypi/python-daemon/1.5.2/>. The latest version is always available via the library's PyPI page <URL:http://pypi.python.org/pypi/python-daemon/>. What's new in this version ========================== Since version 1.5 the following significant improvements have been made: * The documented option ‘prevent_core’, which defaults to True allowing control over whether core dumps are prevented in the daemon process, is now implemented (it is specified in PEP 3143 but was accidentally omitted until now). * A document answering Frequently Asked Questions is now added. -- \ “Any intelligent fool can make things bigger and more complex… | `\ It takes a touch of genius – and a lot of courage – to move in | _o__) the opposite direction.” —Albert Einstein | Ben Finney

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ANN: XYZCommander-0.0.2 (added missing homepage URL)
by Max E. Kuznecov Oct. 23, 2009

Oct. 23, 2009

I'm pleased to announce the XYZCommander version 0.0.2! XYZCommander is a pure console visual file manager. Main features: * Tight integration with python run–time system — most of the settings can be changed "on the fly" via management console. * Powerful configuration system - define own actions, aliases, internal commands, key bindings. * Extensible plug-in system - even core functionality implemented mainly using plug–ins, keeping base system small and clean. * Events & hooks subsystem - a flexible way of reacting on certain system events. * Customizable look-n-feel - every widget component look can be changed via skins. * Unicode support XYZCommander runs on *nix platform and requires python version >= 2.5 and urwid library. Change log for 0.0.2: * [UI] New box widget: ButtonBox. Widget shows a dialog box with custom buttons. * [UI] New method :sys:panel:get_active() Method returns list of tagged VFSObject instances or list of single selected object if none tagged. * [UI] New method :sys:panel:get_current(). Method returns VFSObject instance of current directory. * [UI] New method :sys:panel:vfs_driver(). Method returns vfs driver used by current object * [UI] New method :sys:cmd:put(). Method allows to put arbitrary string to command line. * [UI] New method :sys:panel:search_cycle(). Method allows to search objects in current working directory in direction downwards-from up to selected file. Set this method as default binding for META-S. * [PLUGIN] New method :vfs:vfsutils:remove() Method shows a dialog for [recursively] deleting VFSObjects. Bound to F8. * [PLUGIN] New method :vfs:vfsutils:copy() Method shows a dialog for [recursively] copying VFSObjects. Bound to F5. * [PLUGIN] New method :vfs:vfsutils:move() Method shows a dialog for [recursively] moving VFSObjects. Bound to F6. * [PLUGIN] New plugin :misc:where. Plugin provides an ability to load/restore path locations on both panels * [PLUGIN] New plugin :fsrules:magic. Plugin adds an ability to match files based on magic database. * [VFS] Implemented Tar VFS module. Default actions set to use it on *.tar, *.tar.gz and *.tar.bz2 named files. * [CORE] New events and hooks mechanism. It is now possible to set own hooks on all events. * [SKINS] New box rule attribute - input. It is used for any text input widgets Homepage: http://xyzcmd.syhpoon.name/ -- ~syhpoon

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[ANN] Advanced Scientific Programming in Python Winter School in Warsaw, Poland
by Tiziano Zito Oct. 23, 2009

Oct. 23, 2009

Advanced Scientific Programming in Python a Winter School by the G-Node and University of Warsaw Scientists spend more and more time writing, maintaining, and debugging software. While techniques for doing this efficiently have evolved, only few scientists actually use them. As a result, instead of doing their research, they spend far too much time writing deficient code and reinventing the wheel. In this course we will present a selection of advanced programming techniques with theoretical lectures and practical exercises tailored to the needs of a programming scientist. New skills will be tested in a real programming project: we will team up to develop an entertaining scientific computer game. We'll use the Python programming language for the entire course. Python works as a simple programming language for beginners, but more importantly, it also works great in scientific simulations and data analysis. Clean language design and easy extensibility are driving Python to become a standard tool for scientific computing. Some of the most useful open source libraries for scientific computing and visualization will be presented. This winter school is targeted at Post-docs and PhD students from all areas. Substantial proficiency in Python or in another language (e.g. Java, C/C++, MATLAB, Mathematica) is absolutely required. An optional, one-day introduction to Python is offered to participants without prior experience with the language. Date and Location: February 8th — 12th, 2010. Warsaw, Poland. Preliminary Program: - Day 0 (Mon Feb 8) — [Optional] Dive into Python - Day 1 (Tue Feb 9) — Software Carpentry • Documenting code and using version control • Test-driven development and unit testing • Debugging, profiling and benchmarking techniques • Object-oriented programming, design patterns, and agile programming - Day 2 (Wed Feb 10) — Scientific Tools for Python • NumPy, SciPy, Matplotlib • Data serialization: from pickle to databases • Programming project in the afternoon - Day 3 (Thu Feb 11) — The Quest for Speed • Writing parallel applications in Python • When parallelization does not help: the starving CPUs problem • Programming project in the afternoon - Day 4 (Fri Feb 12) — Practical Software Development • Software design • Efficient programming in teams • Quality Assurance • Programming project final Applications: Applications should be sent before December 6th, 2009 to: python-winterschool(a)g-node.org No fee is charged but participants should take care of travel, living, and accommodation expenses. Applications should include full contact information (name, affiliation, email & phone), a *short* CV and a *short* statement addressing the following questions: • What is your educational background? • What experience do you have in programming? • Why do you think “Advanced Scientific Programming in Python” is an appropriate course for your skill profile? Candidates will be selected on the basis of their profile. Places are limited: early application is recommended. Notifications of acceptance will be sent by December 14th, 2009. Faculty • Francesc Alted, author of PyTables, Castelló de la Plana, Spain [Day 3] • Pietro Berkes, Volen Center for Complex Systems, Brandeis University, USA [Day 1] • Zbigniew Jędrzejewski-Szmek, Institute of Experimental Physics, University of Warsaw, Poland [Day 0] • Eilif Muller, Laboratory of Computational Neuroscience, Ecole Polytechnique Fédérale de Lausanne, Switzerland [Day 3] • Bartosz Teleńczuk, Institute for Theoretical Biology, Humboldt-Universität zu Berlin, Germany [Day 2] • Niko Wilbert, Institute for Theoretical Biology, Humboldt-Universität zu Berlin, Germany [Day 1] • Tiziano Zito, Bernstein Center for Computational Neuroscience, Berlin, Germany [Day 4] Organized by Piotr Durka, Joanna and Zbigniew Jędrzejewscy-Szmek (Institute of Experimental Physics, University of Warsaw), and Tiziano Zito (German Neuroinformatics Node of the INCF). Website: http://www.g-node.org/python-winterschool Contact: python-winterschool(a)g-node.org

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Announcing IronPython 2.0.3
by David DiCato Oct. 23, 2009

Oct. 23, 2009

Hello Python Community, I am delighted to announce the release of IronPython 2.0.3. This release is a minor update to IronPython 2.0.2 and the latest in a series of CPython 2.5-compatible releases running on the .NET platform. Again, our priority was to make IronPython 2.0.3 a bugfix release that remains backwards-compatible with IronPython 2.0.2. In particular, we focused on issues the IronPython community brought to our attention through http://www.codeplex.com/. As such, there have been important improvements on the compatibility and stability of IronPython as summarized below. You can download IronPython 2.0.3 at: http://ironpython.codeplex.com/Release/ProjectReleases.aspx?ReleaseId=30416 Silverlight users: As of IronPython 2.0.2, a new version of Silverlight, namely Silverlight 3, is required to build the "Silverlight Release" and "Silverlight Debug" configurations of IronPython.sln. Please update Silverlight accordingly if you intend to do so. The following issues were fixed: * 24224 - UTF-8 encoding sometimes broken! * 19510 - Need to recognize DefaultMemberAttribute for __getitem__/__setitem__ * 24129 - 2.0.3: not <object-with-__len__-returning-nonzero> should not be 1 * 21976 - 2.0.3: Executables created by Pyc.py broken without access to original Python sources * 24452 - 2.0: Fix FxCop warnings * 24453 - 2.0: Cannot build "FxCop" build configuration of IronPython.Modules.csproj * 24571 - 2.0.3: help(Array[Int32]) causes a traceback * 24373 - empty sys.argv in compiled scripts for 2.0 * 24475 - Creating a low-permission version of PythonEngine fails post 2.0.0 * An issue where sys.argv lacks its first argument (the executable name) in compiled scripts * A failure in partial trust on Windows 7 due to a SecurityException. Special thanks goes out to kanryu, fwereade, kuno, kylehr, and Vassi for bringing these issues to our attention. Thanks for spending the time and effort that allows us to continue improving IronPython! - The IronPython Team

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ANN: XYZCommander-0.0.2
by Max E. Kuznecov Oct. 22, 2009

Oct. 22, 2009

I'm pleased to announce the XYZCommander version 0.0.2! XYZCommander is a pure console visual file manager. Main features: * Tight integration with python run–time system — most of the settings can be changed "on the fly" via management console. * Powerful configuration system - define own actions, aliases, internal commands, key bindings. * Extensible plug-in system - even core functionality implemented mainly using plug–ins, keeping base system small and clean. * Events & hooks subsystem - a flexible way of reacting on certain system events. * Customizable look-n-feel - every widget component look can be changed via skins. * Unicode support XYZCommander runs on *nix platform and requires python version >= 2.5 and urwid library. Change log for 0.0.2: * [UI] New box widget: ButtonBox. Widget shows a dialog box with custom buttons. * [UI] New method :sys:panel:get_active() Method returns list of tagged VFSObject instances or list of single selected object if none tagged. * [UI] New method :sys:panel:get_current(). Method returns VFSObject instance of current directory. * [UI] New method :sys:panel:vfs_driver(). Method returns vfs driver used by current object * [UI] New method :sys:cmd:put(). Method allows to put arbitrary string to command line. * [UI] New method :sys:panel:search_cycle(). Method allows to search objects in current working directory in direction downwards-from up to selected file. Set this method as default binding for META-S. * [PLUGIN] New method :vfs:vfsutils:remove() Method shows a dialog for [recursively] deleting VFSObjects. Bound to F8. * [PLUGIN] New method :vfs:vfsutils:copy() Method shows a dialog for [recursively] copying VFSObjects. Bound to F5. * [PLUGIN] New method :vfs:vfsutils:move() Method shows a dialog for [recursively] moving VFSObjects. Bound to F6. * [PLUGIN] New plugin :misc:where. Plugin provides an ability to load/restore path locations on both panels * [PLUGIN] New plugin :fsrules:magic. Plugin adds an ability to match files based on magic database. * [VFS] Implemented Tar VFS module. Default actions set to use it on *.tar, *.tar.gz and *.tar.bz2 named files. * [CORE] New events and hooks mechanism. It is now possible to set own hooks on all events. * [SKINS] New box rule attribute - input. It is used for any text input widgets -- ~syhpoon

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Announcing IronPython 2.6 CTP for .NET 4.0 Beta 2
by Dino Viehland Oct. 21, 2009

Oct. 21, 2009

Hello Python Community, We're quite pleased to announce the release of "IronPython 2.6 CTP for .NET 4.0 Beta 2". This is our third preview of IronPython running under the Dynamic Language Runtime that is built directly into a .NET 4.0 release! As before, this release allows you to use IronPython objects and types as .NET 4.0 dynamic objects from within C# and Visual Basic code. This release is extremely similar to IronPython 2.6 RC 1. Please also note that "IronPython 2.6 CTP for .NET 4.0 Beta 2" will run only under .NET 4.0 Beta 2. Here's a small example showing just how powerful the new dynamic feature is for taking advantage of dynamic language functionality in statically typed languages: <mock.py> import random, math class Mock(object): def __getattr__(self, key): """Mock objects of this type will dynamically implement any requested member""" return random.choice(["hello world", math.pi]) </mock.py> <dynamic_demo.cs> using System; using IronPython.Hosting; using Microsoft.Scripting.Hosting; public class dynamic_demo { static void Main() { var ipy = Python.CreateRuntime(); dynamic mock = ipy.UseFile("mock.py"); dynamic m = mock.Mock(); //The Python Mock type dynamically implements any member that is requested of it System.Console.WriteLine(m.the_csharp_compiler_cannot_possbily_know_this_member_exists_at_compile_time); } } <dynamic_demo.cs> To try out this preview release: 1. Install some variant of .NET 4.0 Beta 2 or Visual Studio 2010 Beta 2. E.g., http://www.microsoft.com/downloads/details.aspx?FamilyID=9f5e8774-c8dc-4ff6… 2. Install IronPython 2.6 CTP for .NET 4.0 Beta 2.msi from http://ironpython.codeplex.com/Release/ProjectReleases.aspx?ReleaseId=28125 3. Follow any of the many dynamic walkthroughs online. http://blogs.msdn.com/vbteam/archive/2008/12/17/walkthrough-dynamic-program… would be a good start Have fun! The IronPython Team

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