Mailman 3 February 2010 - Python-announce-list

Nagare web framework 0.3.0 released
by Alain Poirier 16 Feb '10

16 Feb '10

Hi all, The version 0.3.0 of the Nagare web framework is now released ! To read about its features: http://www.nagare.org/trac/wiki/NagareFeatures Release info and download page: http://pypi.python.org/pypi/nagare Release info and download page of the examples: http://pypi.python.org/pypi/nagare.examples Source and documentation available at the website: http://www.nagare.org Mailing lists - the place to ask questions: http://groups.google.com/group/nagare-users About Nagare ============ Nagare is a components based framework: a Nagare application is a composition of interacting components each one with its own state and workflow kept on the server. Each component can have one or several views that are composed to generate the final web page. This enables the developers to reuse or write highly reusable components easily and quickly. Thanks to Stackless Python, Nagare is also a continuation-based web framework which enables to code a web application like a desktop application, with no need to split its control flow in a multitude of controllers and with the automatic handling of the back, fork and refresh actions from the browser. Its component model and use of the continuation come from the famous Seaside Smalltalk framework. Furthermore Nagare integrates the best tools and standard from the Python world. For example: - WSGI: binds the application to several possible publishers, - lxml: generates the DOM trees and brings to Nagare the full set of XML features (XSL, XPath, Schemas ...), - setuptools: installs, deploys and extends the Nagare framework and the Nagare applications too, - PEAK Rules: generic methods are heavily used in Nagare, to associate views to components, to define security rules, to translate Python code to Javascript ... - WebOb: for its Request and Response Objects. Examples ======== A complete "guess a number" game to taste how easy web coding becomes using continuations: import random from nagare import component, util class Number(component.Task): """A little game to guess a number """ def go(self, comp): """The game algorithm, using continuation for a pure linear Python code In: - ``comp`` -- this component """ self.attempt = 1 number = random.randint(1, 20) comp.call(util.Confirm('I choose a number between 1 and 20. Try to guess it')) while True: x = comp.call(util.Ask('Try #%d: ' % self.attempt)) if not x.isdigit(): continue x = int(x) if x > number: comp.call(util.Confirm('Choose a lower number')) if x < number: comp.call(util.Confirm('Choose a greater number')) if x == number: comp.call(util.Confirm('You guessed the number in %d attempts' % self.attempt)) break self.attempt += 1 A simple todo list, illustrating the programmatic HTML generation, the association of view(s) to Python objects and the direct association of callbacks to HTML form elements and links: from nagare import presentation from nagare.namespaces import xhtml # A plain Python ``TodoList`` class class TodoList(object): def __init__(self): self.todo = [] def add_todo(self, msg): self.todo.append(msg) # The default HTML view, generated in programmatic HTML @presentation.render_for(TodoList) def render(self, h, comp, model): # ``h`` is a (X)HTML renderer (http://www.nagare.org/trac/wiki/RendererObjects) with h.div: for msg in self.todo: h << h.blockquote(msg) << h.hr with h.form: h << 'New todo:' << h.br h << h.textarea.action(self.add_todo) << h.br h << h.input(type='submit', value='Add') return h.root 0.3.0 Changelog =============== New features ------------ - refactoring of the sessions managers: - session objects now keep track of their sessions manager - no more sessions manager factories - configurable pickler / unpickler objects - configuration switch ``states_history`` to set if an objects graphs history must be kept - new sessions manager (``type=memory``) that keeps the objects graphs in memory, without any pickling - logging service added: - one dedicated logger for each published applications is created - easy configuration and use of this dedicated logger - all the ``[logging]`` sections of all the published applications are merged before to configure the Python logging system - preliminary Comet support added (currently only working in a multi-threaded env.) - last exception raised kept by the ``WSGIApp`` objects and exception hook added - ``with_request`` parameter added to all the callback registrations and ``Update()`` objects - translation of Python modules to Javascript added - configurable name for the security cookie (one of the post Nagare security audit actions) - configuration of the ``WSGIApp`` objects split accross multiples `set_*`` methods - ``get_registered_applications()`` added to the publisher objects - full YUI bundled with Nagare - New versions: - Stackless Python 2.6.4 is now the recommanded Python version - virtualenv updated to 1.4.5 - SQLAlchemy updated to 0.5.8 - Elixir updated to 0.7.1 - Lxml updated to 2.2.4 - YUI updated to 2.8.0r4 Changes ------- - with the YUI connection manager, a large browser response must be reassembled (Firefox only) - late creation of the SQLAlchemy database engines and metadatas binding - input fields ot type ``button`` now working in an Ajax submit - ``Var.var()`` now working inn a unicode context - ``nagare-admin create-rules`` had problems when a static directory didn't exist - bad boolean expressions parenthesis translation in pyjs fixed - parsing (X)HTML from URL now working under Windows Bugs fixed ---------- - #47: ``set_publisher()`` called when using "nagare-admin create-db" - #48: py2js parentheses bug - #49: ``reset`` configuration ignored by the memcached sessions manager - #50: [log] inferred caller is wrong Enjoy! A. Poirier

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ANN: easygconf 0.03
by Florian Diesch 16 Feb '10

16 Feb '10

I'm happy to announce easygconf 0.03 Get it at http://www.florian-diesch.de/software/easygconf/ Changes since 0.02: ------------------- * renamed GConfDict.add_listner() to add_listener() * fixed bug in GConfDict.from_python() (thanks to Pawn Hearts <pawn13 at gmail.com>) easygconf provids an easy, pythonic way to access GConf <http://projects.gnome.org/gconf/>`__ through a dict-like interface. Example ------- :: from easygconf import GConfDict import gtk key = 'test gc=GConfDict('/apps/easygconftest') print "%s is %s"%(key, gc[key]) gc[key] = 'foo' print "Now %s is %s"%(key, gc[key]) def callback (key, value, gconfdict, id, args): print "%s changed to %s"%(key, value) gc.add_listener('test', callback) try: gtk.main() except KeyboardInterrupt: pass gc.unset('test') Florian -- GUIs programmieren mit Python und Glade: <http://www.florian-diesch.de/doc/python-und-glade/>

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moin 1.8.7 released - important security and bug fixes
by Reimar Bauer 15 Feb '10

15 Feb '10

MoinMoin 1.8.7 is a security bug fix release. Please update as soon as possible. See http://moinmo.in/MoinMoinDownload for the release archive and the change log. BTW, we still need much more people helping with cleaning up on master19.moinmo.in. So, especially if you speak some non-english language, you can help! See http://moinmo.in/MoinDev/Translation for details.

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ANN: unicode 0.9.4
by garabik-news-2005-05＠kassiopeia.juls.savba.sk 14 Feb '10

14 Feb '10

unicode is a simple python command line utility that displays properties for a given unicode character, or searches unicode database for a given name. It was written with Linux in mind, but should work almost everywhere (including MS Windows and MacOSX), UTF-8 console is recommended. The package contains also 'paracode' utility, that exploits the full power of the Unicode standard to convert the text into vіѕuаllу ѕіmіlаr ѕtrеаm οf glурhѕ, whіlе uѕіng сοmрlеtеlу dіffеrеnt сοdерοіntѕ. It is an excellent didactic tool demonstrating the principles and advanced use of the Unicode standard. Changes since previous versions: * works with new (split) Unihan files Author: Radovan Garabík URL: http://kassiopeia.juls.savba.sk/~garabik/software/unicode/ License: GPL -- ----------------------------------------------------------- | Radovan Garabík http://kassiopeia.juls.savba.sk/~garabik/ | | __..--^^^--..__ garabik @ kassiopeia.juls.savba.sk | ----------------------------------------------------------- Antivirus alert: file .signature infected by signature virus. Hi! I'm a signature virus! Copy me into your signature file to help me spread!

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Release of CodeInvestigator 0.22.0
by hans moleman 12 Feb '10

12 Feb '10

CodeInvestigator 0.22.0 was released on Feb 13. I have changed the recording process to make it run faster. CodeInvestigator is a tracing tool for Python programs. Running a program through CodeInvestigator creates a recording. Program flow, function calls, variable values and conditions are all stored for every line the program executes. The recording is then viewed with an interface consisting of the code. The code can be clicked: A clicked variable displays its value,a clicked loop displays its iterations. You read code, and have at your disposal all the run time details of that code. A computerized desk check tool and another way to learn about your program. http://sourceforge.net/project/showfiles.php?group_id=183942

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ANN: Leo 4.7 rc1 released
by Edward K Ream 12 Feb '10

12 Feb '10

Leo 4.7 release candidate 1 is now available at: http://sourceforge.net/project/showfiles.php?group_id=3458&package_id=29106 Leo 4.7 rc 1 fixes all known serious bugs in Leo; minor nits remain. Leo is a text editor, data organizer, project manager and much more. See: http://webpages.charter.net/edreamleo/intro.html The highlights of Leo 4.7: -------------------------- - Leo now uses the simplest possible internal data model. This is the so-called "one-node" world. - Leo supports Python 3.x. - Leo requires Python 2.6 or above. - Several important improvements in file handling. - Leo converts @file nodes to @thin nodes automatically. - Leo creates a 'Recovered Nodes' node to hold data that otherwise might be lost due to clone conflicts. - @auto-rst now works much more reliably reliably. - Leo no longer supports @noref trees. Such trees are not reliable in cooperative environments. - A new Windows installer. - Many other features, including new command line options and new plugins. - Dozens of bug fixes. Links: ------ Leo: http://webpages.charter.net/edreamleo/front.html Forum: http://groups.google.com/group/leo-editor Download: http://sourceforge.net/project/showfiles.php?group_id=3458 Bzr: http://code.launchpad.net/leo-editor/ Quotes: http://webpages.charter.net/edreamleo/testimonials.html Edward K. Ream February 12, 2010

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Logging in YAML format
by Joan Miller 12 Feb '10

12 Feb '10

Yamlog, v0.9 released Yamlog uses a rotating file that rollovers at 128 KB, it writes messages in YAML format since it's more easy to parse --using the international format for date and time--, and it also logs the higher- level messages to the standard error into single lines. http://pypi.python.org/pypi/Yamlog http://github.com/kless/Yamlog

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SmartSweeper: exercise to write "AI" for minesweeper
by Beni Cherniavsky 12 Feb '10

12 Feb '10

One day I was bored with MineSweeper not doing even simple analysis for me, and wrote it in Python. Then I realized it'd be nice as an exercise: I give you an implementation of dumb MineSweeper, with GUI, and you subclass it to make it smarter. It comes with a detailed document guiding you step-by-step. If you don't feel like programming but just want to play, it comes with a full solution :-) The latest version will always live at: http://cben-hacks.sourceforge.net/python/smartsweeper/ I'd be happy to hear feedback. -- Beni Cherniavsky-Paskin <cben(a)users.sf.net>

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Announce: Linux Desktop Testing Project (LDTP) 1.7.2 released
by Nagappan Alagappan 12 Feb '10

12 Feb '10

Greetings all, We are proud to announce the release of LDTP 1.7.1. 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 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. NOTE: *** This is a bug fix release only as requested by Sun QA team, we recommend to use LDTPv2 *** Changes in this release: Patch by James Tatum to fix Bug 606224 - Exceptions do not return unicode data Patch by Ara Pulido to fix Bug 603115 - Activate wnck function is not working Bug 603118 - wnck wrappers do not work with LDTP window names Bug 605650 - LDTP core dumps on OpenSolaris Bug 598947 - waittillguiexist() documentation should say if wildcards/regexes are allowed Patch by Adam Collard to fix Bug 599119 - checkrow action fails on table row Special thanks to James Tatum, Ara Pulido, Murray Cumming, Conny Cheng, Adam Collard Download source - http://download.freedesktop.org/ldtp/1.x/1.7.x/ldtp-1.7.2.tar.gz Download rpm - http://download.opensuse.org/repositories/home:/anagappan/ Will schedule deb build soon in openSUSE Build Service 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: ActivePython 2.5.5.7 is now available
by Sridhar Ratnakumar 12 Feb '10

12 Feb '10

I'm happy to announce that ActivePython 2.5.5.7 is now available for download from: http://www.activestate.com/activepython/ This is a minor release with several updates and fixes. Changes in 2.5.5.7 ------------------ - Upgrade to Python 2.5.5 - Upgrade to Tcl/Tk 8.5.8 - Upgrade to PyWin32 CVS (2009-11-10) - Security upgrade to openssl-0.9.8l - [Windows] Include Tcl/Tk header files - [Windows] Allow side-by-side installation of 32-bit and 64-bit builds - [Mac] Fix the MacOSX build to use Tcl/Tk 8.5.x See the release notes for full details: http://docs.activestate.com/activepython/2.5/relnotes.html#changes What is ActivePython? --------------------- ActivePython is ActiveState's binary distribution of Python. Builds for Windows, Mac OS X, Linux are made freely available. Builds for Solaris, HP-UX and AIX, and access to older versions are available with ActivePython Business Edition: http://www.activestate.com/business_edition/ ActivePython includes the Python core and the many core extensions: zlib and bzip2 for data compression, the Berkeley DB (bsddb) and SQLite (sqlite3) database libraries, OpenSSL bindings for HTTPS support, the Tix GUI widgets for Tkinter, ElementTree for XML processing, ctypes (on supported platforms) for low-level library access, and others. The Windows distribution ships with PyWin32 -- a suite of Windows tools developed by Mark Hammond, including bindings to the Win32 API and Windows COM. Beginning with the 2.6.3.7 release, ActivePython includes a binary package manager for Python (PyPM) that can be used to install packages much easily. For example: pypm install pylons See this page for full details: http://docs.activestate.com/activepython/2.5/whatsincluded.html As well, ActivePython ships with a wealth of documentation for both new and experienced Python programmers. In addition to the core Python docs, ActivePython includes the "What's New in Python" series, "Dive into Python", the Python FAQs & HOWTOs, and the Python Enhancement Proposals (PEPs). An online version of the docs can be found here: http://docs.activestate.com/activepython/2.5/ We would welcome any and all feedback to: ActivePython-feedback(a)activestate.com Please file bugs against ActivePython at: http://bugs.activestate.com/query.cgi?set_product=ActivePython On what platforms does ActivePython run? ---------------------------------------- ActivePython includes installers for the following platforms: - Windows/x86 - Windows/x64 (aka "AMD64") - Mac OS X - Linux/x86 - Linux/x86_64 (aka "AMD64") - Solaris/SPARC (Business Edition only) - Solaris/x86 (Business Edition only) - HP-UX/PA-RISC (Business Edition only) - AIX/PowerPC (Business Edition only) - AIX/PowerPC 64-bit (Business Edition only) Custom builds are available in Enterprise Edition: http://www.activestate.com/activepython/enterprise/ Thanks, and enjoy! The Python Team -- Sridhar Ratnakumar sridharr at activestate.com

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Save the date: SciPy 2010 June 28 - July 3
by Amenity Applewhite 11 Feb '10

11 Feb '10

The annual US Scientific Computing with Python Conference, SciPy, has been held at Caltech since it began in 2001. While we always love an excuse to go to California, it’s also important to make sure that we allow everyone an opportunity to attend the conference. So, as Jarrod Millman announced last fall, we’ll begin rotating the conference location and hold the 2010 conference in Austin, Texas. As you may know, Enthought is headquartered in Austin. So in addition to our standard SciPy sponsorship, this year we’ll also be undertaking a great deal of the planning and organization. To begin with, we’re thrilled to announce that we’ve secured several corporate sponsorships that will allow us to host the conference at the brand new AT&T Executive Education and Conference Center on campus at the University of Texas. It’s a wonderful facility in Central Austin and provides easy access to an array of great restaurants, parks, and music venues. We will also be able to provide stipends for our Tutorial presenters for the first time. These community members provide us with an invaluable learning experience every year, and we’re very excited to be able to compensate them for their efforts. And of course, we’ll also continue to offer student sponsorships to support active academic contributors who want to attend the conference. So mark your calendars, folks! June 28 – July 3. Early registration open now. Thanks, The Enthought Team -- Amenity Applewhite Enthought, Inc. Scientific Computing Solutions www.enthought.com

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Announce: Linux Desktop Testing Project (LDTP) 2.0.3 released
by Nagappan Alagappan 11 Feb '10

11 Feb '10

Hello, About LDTP: Linux Desktop Testing Project is aimed at producing high quality test automation framework (using GNOME / 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. We strive to help in building a quality desktop. Changes in this release: Return always unicode string in gettextvalue, required to fix automated test script in VMware Workstation Fix ooldtp compatibility with LDTPv1 as reported by Mago [1] team Patch by James Tatum for getallstates compatible with hasstate function Fix bug b.g.o#608413 Fix Firefox preference accessing bug, reported by Aaron Yuan < yuanchong1986(a)gmail.com> Download source: http://download.freedesktop.org/ldtp/2.x/2.0.x/ldtp-2.0.3.tar.gz Download RPM from http://download.opensuse.org/repositories/home:/anagappan:/ldtp2:/rpm/ Will schedule deb build in openSUSE build service tomorrow Documentation 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 Report bugs - http://ldtp.freedesktop.org/wiki/Bugs To subscribe to LDTP mailing lists, visit http://ldtp.freedesktop.org/wiki/Mailing_20list IRC Channel - #ldtp on irc.freenode.net Thanks Nagappan [1] - http://mago.ubuntu.com -- Linux Desktop (GUI Application) Testing Project - http://ldtp.freedesktop.org http://nagappanal.blogspot.com

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Announcing IronPython 2.6.1 RC1
by David DiCato 10 Feb '10

10 Feb '10

Hello Python Community, We're pleased to announce the release of IronPython 2.6.1 RC1. This version of IronPython makes great strides in stability and compatibility, including a considerable number of targeted bugfixes. Because this is our largest servicing release to date, and due to our decision against incrementing the assembly version numbers, it is important that we get everything right. To this end, we present our first-ever RC for a minor dot release. Of course, your feedback is imperative to the quality of this release, so we'd love to hear from you! IronPython 2.6.1 comes in two flavors - one that runs on top of .NET 4.0 RC, and one that runs on any other framework starting with .NET 2.0 SP1. They can be downloaded here: - IronPython 2.6.1 RC1 for .NET 2.0 SP1: http://ironpython.codeplex.com/Release/ProjectReleases.aspx?ReleaseId=40144 - IronPython 2.6.1 RC1 for .NET 4.0 RC: http://ironpython.codeplex.com/Release/ProjectReleases.aspx?ReleaseId=40146 Note: The .NET Framework 4.0 RC is required for the latter release and can be downloaded at http://www.microsoft.com/downloads/details.aspx?FamilyID=a9ef9a95-58d2-4e51… IronPython 2.6.1 RC1 includes fixes for well over 50 bugs, large and small. Ctypes has had a number of significant updates, including union support, variant_bool, and wintypes. Another focus has been on sys.settrace, making debugging more reliable. For example, sys.settrace now returns the correct frame, supports tracing through modules, and no longer interferes with "import os". Other notable fixes include thread-safe importing, and the missing error code in _winreg exception. In addition, we've made a substantial improvement in import time. Not only does this reduce startup time, but can speed up the importing of large, definition-heavy modules by up to 50%. As you might imagine, the .NET 4.0 flavor of IronPython 2.6.1 RC1 has a few of its own changes designed for better interoperability with the framework. These include fixing some errors with Func<> and better runtime isolation when similarly-named assemblies in different locations are loaded in multiple engines. In addition, both the .NET 2.0 and .NET 4.0 builds support the new .NET 4.0 IStructuralEquatable and IStructuralComparable interfaces and maps them to the appropriate operations (__eq__, __hash__, __gt__, etc.). In the case of .NET 4.0, this replaces IValueEquality as the gold standard for defining equality in an interop-friendly manner. In the .NET 2.0 build, these interfaces are copied so that their use can be phased in while retaining IValueEquality for backwards compatibility. Special thanks to Albert Szilvasy, cendalc, clovery, egonw_, essey, fabiofz, igalse, jazzcat, jlunder, laughingboy, marten_range, László de Almásy, lbaker, Lukas Cenovsky, pl6306, roinet, sanxiyn, Thomas Heller, vernondcole, and Wolfram for reporting issues. Happy Scripting! - The IronPython Team

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[ANN] pyxser-1.4.2r --- Python Object to XML serializer/deserializer
by Daniel Molina Wegener 10 Feb '10

10 Feb '10

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Hello Python Community. I'm pleased to announce pyxser-1.4.2r, a python extension which contains functions to serialize and deserialize Python Objects into XML. It is a model based serializer. Here is the ChangeLog entry for this release: - ---8<--- 1.4.2r (2010.02.10): Daniel Molina Wegener <dmw at coder dot cl> * pyxser_collections.c: Added constraint checks for NULL pointers removing nested statements. * pyxser.c: Removed nested statements. * pyxser_tools.c: Added constratints checks for NULL pointers, removed nested statements and added strict checking for lists since it was crashing with an ambigous list definition that can not be handled by PyList_Check(). * test-utf8.py: Added tests to determine if it continue crashing with module serialization. Thanks to pyxser users for their feedback. - ---8<--- This release contains some bug fixes, mainly related to type checking and type handling. I hope this small extension will help you on your programming tasks. The project is hosted at: http://sourceforge.net/projects/pyxser/ The web page for the project is located at: http://coder.cl/products/pyxser/ PyPi entry is: http://pypi.python.org/pypi?:action=display&name=pyxser&version=1.4.2r For a sample article on how to integrate pyxser with ZSI WebServices: http://coder.cl/2009/10/18/pyxser-and-zsi-webservices/ Thanks and best regards, - -- Daniel Molina Wegener <dmw [at] coder [dot] cl> Software Architect, System Programmer & Web Developer Phone: +1 (510) 629-4267 | Blog: http://coder.cl/ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iQIcBAEBCgAGBQJLcwqwAAoJEHxqfq6Y4O5NP2YQAKwiMq7xdutSpEcrXPsD2dxI VQUhzoaJ+Z+N0Vu6nKLM8yOXGkCSD8iuKgV3ZimH3gHhYs/VTvfkNwkfJuck76Vg y3CvJ69rVezYI2ELcsWP0+srxffyy0NHgYEKlKU3Dz06PhNnGx2PMfeG7j5ZGKyz 92J+PMoO6FSlRAmEmGrnjtWaCeNLmlJ2rdSvQ7iSIV8mTwULHB2QubvNs62x+8v5 Mj8XM4HVVEqOI2aF3KuAhYdHj6Exz3O5clnzT6niYl/ukWErSZ6JUJoF9IKcBPVJ LYMCIPvad6llr2FcIatve7MwdmFx/FVNkpd7oZuvLEiQYqxsuT9fv2L/1Ne1IRSM KRLW5/oqekirIURJgFmn6rw0D9Hj5eQXfXTTCHT+RTUaWgMKXFiVkSCHpOeX5M14 i4pp1+xUhje/R+Y05FmdcBivahdc+4UiaQsWODIj/kUbfa455aLrVomdLzXQavg/ 9nY/N5sd0wqdW2vyJrgvap1lAhzP+ktFk/UTetUavvz9bz0tHRB9aTNDS53dfck5 yVX/ZumRdtf4wtwTu/t6gkWD7N0K0Bmy1EB3JNz6KCBvjL8QDB8W/kW+os85QFoz 9NxedRoJNn5nVyos879+ClnHqXVTtkmeJOuLFuh2+9pnfc/KSAvCDXZKPZZNHKYx WdTJKm400Hi9J/pIOzx/ =bv4P -----END PGP SIGNATURE-----

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ANN: Celery 1.0 released
by Ask Solem 10 Feb '10

10 Feb '10

=============================== Celery 1.0 has been released! =============================== We're happy to announce the release of Celery 1.0. What is it? =========== Celery is a task queue/job queue based on distributed message passing. It is focused on real-time operation, but supports scheduling as well. The execution units, called tasks, are executed concurrently on one or more worker servers. Tasks can execute asynchronously (in the background) or synchronously (wait until ready). Celery is already used in production to process millions of tasks a day. Celery was originally created for use with Django, but is now usable from any Python project. It can also operate with other languages via webhooks. The recommended message broker is RabbitMQ (http://rabbitmq.org), but support for Redis and databases is also available. For more information please visit http://celeryproject.org Features -------- See http://ask.github.com/celery/getting-started/introduction.html#features Stable API ========== From this version on the public API is considered stable. This means there won't be any backwards incompatible changes in new minor versions. Changes to the API will be deprecated; so, for example, if we decided to remove a function that existed in Celery 1.0: * Celery 1.2 will contain a backwards-compatible replica of the function which will raise a PendingDeprecationWarning. This warning is silent by default; you need to explicitly turn on display of these warnings. * Celery 1.4 will contain the backwards-compatible replica, but the warning will be promoted to a full-fledged DeprecationWarning. This warning is loud by default, and will likely be quite annoying. * Celery 1.6 will remove the feature outright. See the Celery Deprecation Timeline for a list of pending removals: http://ask.github.com/celery/internals/deprecation.html What's new? =========== * Task decorators Write tasks as regular functions and decorate them. There are both task(), and periodic_task() decorators. * Tasks are automatically registered Registering the tasks manually was getting tedious, so now you don't have to anymore. You can still do it manually if you need to, just disable Task.autoregister. The concept of abstract task classes has also been introduced, this is like django models, where only the subclasses of an abstract task is registered. * Events If enabled, the worker will send events, telling you what tasks it executes, their results, and how long it took to execute them. It also sends out heartbeats, so listeners are able to detect nonfunctional workers. This is the basis for the new real-time web monitor we're working on (celerymon: http://github.com/ask/celerymon/). * Rate limiting Global and per task rate limits. 10 tasks a second? or one an hour? You decide. It's using the token bucket algorithm, which is commonly used for network traffic shaping. It accounts for bursts of activity, so your workers won't be bored by having nothing to do. * New periodic task service. Periodic tasks are no longer dispatched by celeryd, but instead by a separate service called *celerybeat*. This is an optimized, centralized service dedicated to your periodic tasks, which means you don't have to worry about deadlocks or race conditions any more. But that does mean you have to make sure only one instance of this service is running at any one time. **TIP:** If you're only running a single celeryd server, you can embed celerybeat inside it. Just add the --beat argument. * Broadcast commands If you change your mind and don't want to run a task after all, you now have the option to revoke it. Also, you can rate limit tasks or even shut down the worker remotely. It doesn't have many commands yet, but we're waiting for broadcast commands to reach its full potential, so please share your ideas if you have any. * Multiple queues The worker is able to receive tasks on multiple queues at once. This opens up a lot of new possibilities when combined with the impressive routing support in AMQP. * Platform agnostic message format. The message format has been standardized and is now using the ISO-8601 format for dates instead of Python datetime objects. This means you can write task consumers in other languages than Python (eceleryd anyone?) * Timely Periodic tasks are now scheduled on the clock, i.e. timedelta(hours=1) means every hour at :00 minutes, not every hour from the server starts. To revert to the previous behavior you have the option to enable PeriodicTask.relative. * ... and a lot more! To read about these and other changes in detail, please refer to the change log: http://celeryproject.org/docs/changelog.html This document contains crucial information for those upgrading from a previous version of Celery, so be sure to read the entire change set before you continue. **TIP:** If you install the setproctitle module you can see which task each worker process is currently executing in ps listings. Just install it using pip: pip install setproctitle. Resources ========= * Homepage: http://celeryproject.org * Download: http://pypi.python.org/pypi/celery * Documentation: http://celeryproject.org/docs/ * Changelog: http://celeryproject.org/docs/changelog.html * Code: http://github.com/ask/celery/ * FAQ: http://ask.github.com/celery/faq.html * Mailing-list: http://groups.google.com/group/celery-users * IRC: #celery on irc.freenode.net.

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TODAY end of PyCon online registration
by Catherine Devlin 10 Feb '10

10 Feb '10

Today (Feb 10, 2010) is the last day for PyCon 2010 online registration. Save $150 over onsite registration - register now! *** PyCon * Feb 17-25, 2010 * Atlanta, GA * us.pycon.org *** http://us.pycon.org/2010/registration/ Remind your friends. Sharon Lim of Singapore forwarded this email to all her friends, and soon started her own wildly successful Python-using startup with free sodas and a T-shirt dress code. Guy Green of Austin didn't forward this email, and was reassigned to an overdue COBOL CGI project headed by an MBA with deep self-esteem issues. -- - Catherine http://catherinedevlin.blogspot.com/ *** PyCon * Feb 17-25, 2010 * Atlanta, GA * us.pycon.org ***

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PyCon Dress Rehearsal at the Greater Toronto Area Python User's Group, Feb 16th, 7pm
by Mike C. Fletcher 09 Feb '10

09 Feb '10

This month at PyGTA we have a special treat, 3 PyCon Presenters will do a dress rehearsal of their PyCon 2010 presentations just before they head down to Atlanta. All three talks are targeting general audiences, so feel free to bring along your new Pythonista friends. We have 3 PyCon previews scheduled: * What We've Learned From Building Basie — Greg Wilson * Think Globally, Hack Locally - Teaching Python in Your Community — Leigh Honeywell * Debating 'til Dawn: Topics to keep you up all night — Mike Fletcher We will give each presenter 20 minutes and then as much question/answer and feedback time as they want. At PyCon they'll only get 30 minutes total, but we want to give them as much feedback as possible so they can polish their presentation for the larger audience. We'll start the presentations at 7:30PM (sharp) at Linux Caffe on the 16th. If you bring a laptop, there will be an immediate feedback channel available. PyGTA: http://www.pygta.org Linux Caffe: http://www.pygta.org/venue/ Have fun, Mike -- ________________________________________________ Mike C. Fletcher Designer, VR Plumber, Coder http://www.vrplumber.com http://blog.vrplumber.com

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Python-URL! - weekly Python news and links (Feb 9)
by Gabriel Genellina 09 Feb '10

09 Feb '10

QOTW: "You see? That's what I like about the Python community: people even apologise for apologising :)" - Tim Golden http://groups.google.com/group/comp.lang.python/msg/858d1c31d0c2adff The third alpha version of Python 2.7 is ready for testing: http://groups.google.com/group/comp.lang.python/t/6f49dacfe8759508/ How to enumerate all possible strings matching a given regular expression: http://groups.google.com/group/comp.lang.python/t/1b78346c6661ac4f/ Which language features do you like most? http://groups.google.com/group/comp.lang.python/t/599b3c9772421ece/ Implementing a two-dimensional array in a simple way seems to actually be more efficient than other, more sophisticated alternatives: http://groups.google.com/group/comp.lang.python/t/55e595d6dc4ca3f4/ The new GIL (to be implemented in Python 3.2) will provide less overhead, especially in multicore CPUs: http://groups.google.com/group/comp.lang.python/t/586ef2d3685fa7ea/ In Python 3, 'exec' inside a function does not have the same effect as before: http://groups.google.com/group/comp.lang.python/t/7a046e4ede9c310a/ Using Queue objects to feed and synchronize several worker threads: http://groups.google.com/group/comp.lang.python/t/32256dd608c9c02/ New generation IDEs should provide much better and integrated refactoring tools: http://groups.google.com/group/comp.lang.python/t/e019614ea149e7bd/ There is no module in the standard library to handle filesystem paths in an OO way - but why? http://groups.google.com/group/comp.lang.pythonf580fb3763208425ece/ A "History Channel" special: how the way a TAB key was interpreted changed over time http://groups.google.com/group/comp.lang.python82d9181fcd31ffea3f4/ After a false start, finally we get our first "Is it Call-By-Value or Call-By-Reference?" thread of the year! http://groups.google.com/group/comp.lang.pythonfd36962c4970ac487ea/ ======================================================================== 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… nullege is an interesting search Web application, with the intelligence to distinguish between Python code and comments. It provides what appear to be relevant results, and demands neither Java nor CSS be enabled: http://www.nullege.com 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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Roundup Issue Tracker 1.4.12 released
by Richard Jones 09 Feb '10

09 Feb '10

I'm proud to release version 1.4.12 of Roundup which fixes a number bugs. This release includes fixes for some potential security holes. Please see the upgrading documentation for details of what you might need to do in your tracker. If you're upgrading from an older version of Roundup you *must* follow the "Software Upgrade" guidelines given in the maintenance documentation. This release includes: - Support IMAP CRAM-MD5, thanks Jochen Maes - Proper handling of 'Create' permissions in both mail gateway (earlier commit r4405 by Richard), web interface, and xmlrpc. This used to check 'Edit' permission previously. See http://thread.gmane.org/gmane.comp.bug-tracking.roundup.devel/5133 Add regression tests for proper handling of 'Create' and 'Edit' permissions. - Fix handling of non-ascii in realname in the nosy mailer, this used to mangle the email address making it unusable when replying. Thanks to intevation for funding the fix. - Fix documentation on user required to run the tests, fixes issue2550618, thanks to Chris aka 'radioking' - Add simple doc about translating customised tracker content - Add "flup" setup documentation, thanks Christian Glass - Fix "Web Access" permission check to allow serving of static files to Anonymous again - Add check for "Web Access" permission in all web templating permission checks - Improvements in upgrading documentation, thanks Christian Glass - Display 'today' in the account user's timezone, thanks David Wolever - Fix file handle leak in some web interfaces with logging turned on, fixes issue1675845 - Attempt to generate more human-readable addresses in email, fixes issue2550632 - Allow value to be specified to multilink form element templating, fixes issue2550613, thanks David Wolever - Fix thread safety with stdin in roundup-server, fixes issue2550596 (thanks Werner Hunger) Roundup requires python 2.3 or later (but not 3+) for correct operation. To give Roundup a try, just download (see below), unpack and run:: roundup-demo Release info and download page: http://cheeseshop.python.org/pypi/roundup Source and documentation is available at the website: http://roundup.sourceforge.net/ Mailing lists - the place to ask questions: http://sourceforge.net/mail/?group_id=31577 About Roundup ============= Roundup is a simple-to-use and -install issue-tracking system with command-line, web and e-mail interfaces. It is based on the winning design from Ka-Ping Yee in the Software Carpentry "Track" design competition. Note: Ping is not responsible for this project. The contact for this project is richard(a)users.sourceforge.net. Roundup manages a number of issues (with flexible properties such as "description", "priority", and so on) and provides the ability to: (a) submit new issues, (b) find and edit existing issues, and (c) discuss issues with other participants. The system will facilitate communication among the participants by managing discussions and notifying interested parties when issues are edited. One of the major design goals for Roundup that it be simple to get going. Roundup is therefore usable "out of the box" with any python 2.3+ (but not 3+) installation. It doesn't even need to be "installed" to be operational, though an install script is provided. It comes with two issue tracker templates (a classic bug/feature tracker and a minimal skeleton) and four database back-ends (anydbm, sqlite, mysql and postgresql).

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pylib/py.test 1.2.1 released: improvements, fixes
by holger krekel 08 Feb '10

08 Feb '10

py.test is a mature, advanced automated testing tool working with Python2, Python3 and Jython versions on all major operating systems. It has a simple plugin architecture and can run many existing common Python test suites without modification. It offers some unique features not found in other testing tools. See http://pytest.org for more info. py.test 1.2.1 brings bug fixes and some new options and abilities triggered by user feedback: * --funcargs [testpath] will show available builtin- and project funcargs. * display a short and concise traceback if funcarg lookup fails. * early-load "conftest.py" files in non-dot first-level sub directories. * --tb=line will print a single line for each failing test (issue67) * py.cleanup has a number of new options, cleanups up setup.py related files * fix issue78: always call python-level teardown functions even if the according setup failed. For more detailed information see http://codespeak.net/py/dist/announce/release-1.2.1.html or the CHANGELOG below. cheers and have fun, holger Changes between 1.2.1 and 1.2.0 ===================================== - refined usage and options for "py.cleanup":: py.cleanup # remove "*.pyc" and "*$py.class" (jython) files py.cleanup -e .swp -e .cache # also remove files with these extensions py.cleanup -s # remove "build" and "dist" directory next to setup.py files py.cleanup -d # also remove empty directories py.cleanup -a # synonym for "-s -d -e 'pip-log.txt'" py.cleanup -n # dry run, only show what would be removed - add a new option "py.test --funcargs" which shows available funcargs and their help strings (docstrings on their respective factory function) for a given test path - display a short and concise traceback if a funcarg lookup fails - early-load "conftest.py" files in non-dot first-level sub directories. allows to conveniently keep and access test-related options in a ``test`` subdir and still add command line options. - fix issue67: new super-short traceback-printing option: "--tb=line" will print a single line for each failing (python) test indicating its filename, lineno and the failure value - fix issue78: always call python-level teardown functions even if the according setup failed. This includes refinements for calling setup_module/class functions which will now only be called once instead of the previous behaviour where they'd be called multiple times if they raise an exception (including a Skipped exception). Any exception will be re-corded and associated with all tests in the according module/class scope. - fix issue63: assume <40 columns to be a bogus terminal width, default to 80 - fix pdb debugging to be in the correct frame on raises-related errors - update apipkg.py to fix an issue where recursive imports might unnecessarily break importing - fix plugin links

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[ANN] Next Meeting of pyCologne, February, 10th
by Thomas Lenarz 07 Feb '10

07 Feb '10

Hello, The next meeting of pyCologne will take place Wednesday, February, 10th starting about 6.30 pm - 6.45 pm at Room 0.14, Benutzerrechenzentrum (RRZK-B) University of Cologne, Berrenrather Str. 136, 50937 Köln, Germany Agenda: -editmoin (Reimar Bauer) -Using MoinMoin-Templates (Reimar Bauer) At about 8.30 pm we will as usual enjoy the rest of the evening in a nearby restaurant. Further information including directions how to get to the location can be found at: http://www.pycologne.de (Sorry, this page is in German only) Best Wishes Thomas

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[ANN] Leipzig Python User Group - Meeting, February 9, 2010, 08:00pm
by Mike Müller 07 Feb '10

07 Feb '10

=== Leipzig Python User Group === We will meet on Tuesday, February 9 8:00 pm at the training center of Python Academy in Leipzig, Germany ( http://www.python-academy.com/center/find.html ). Stefan Schwarzer will rehearse his presentation for the Chemnitzer Linux Tage titled "Robustere Python-Programme" (More Robust Python Programs). Furthermore, we will prepare for our booth at Chemnitzer Linux-Tage. Food and soft drinks are provided. Please send a short confirmation mail to info(a)python-academy.de, so we can prepare appropriately. Everybody who uses Python, plans to do so or is interested in learning more about the language is encouraged to participate. While the meeting language will be mainly German, we will provide English translation if needed. Current information about the meetings are at http://www.python-academy.com/user-group . Mike == Leipzig Python User Group === Wir treffen uns am Dienstag, 09.02.2010 um 20:00 Uhr im Schulungszentrum der Python Academy in Leipzig ( http://www.python-academy.de/Schulungszentrum/anfahrt.html ). Stefan Schwarzer wird seinen Vortrag für die Chemnitzer Linux-Tage mit dem Titel "Robustere Python-Programme" halten. Weiterhin werden wir unseren Auftritt auf den Chemnitzer Linux-Tagen vorbereiten. Für das leibliche Wohl wird gesorgt. Eine Anmeldung unter info(a)python-academy.de wäre nett, damit wir genug Essen besorgen können. Willkommen ist jeder, der Interesse an Python hat, die Sprache bereits nutzt oder nutzen möchte. Aktuelle Informationen zu den Treffen sind unter http://www.python-academy.de/User-Group zu finden. Viele Grüße Mike

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ANN: PyBindGen 0.14
by Gustavo Carneiro 07 Feb '10

07 Feb '10

PyBindGen is a Python module that is geared to generating C/C++ code that binds a C/C++ library for Python. It does so without extensive use of either C++ templates or C pre-processor macros. It has modular handling of C/C++ types, and can be easily extended with Python plugins. The generated code is almost as clean as what a human programmer would write. It can be downloaded from: http://code.google.com/p/pybindgen/ Bug reports should be filed here: https://bugs.launchpad.net/ <https://bugs.launchpad.net/pybindgen> pybindgen <https://bugs.launchpad.net/pybindgen> <https://bugs.launchpad.net/pybindgen>Documentation: http://packages.python.org/PyBindGen/ NEWS: === pybindgen 0.14 === - Multiple inheritance support - Virtual methods can now be overridden with Method instead of _Method - Add annotation support for instance attributes - Benchmarks (vs Boost.Python, SWIG, and SIP) - New types supported: int16_t& and std::string* parameter types - Non-virtual protected methods are now also wrapped - Wrap enum pointer params Note: this release marks the beginning of a transition to a minor change in the API of the generated bindings. Prior to PyBindGen version 0.14, the code generated to handle C++ virtual methods required Python user code to define a _foo method in order to implement the virtual method foo. Since 0.14, PyBindGen changed so that virtual method foo is implemented in Python by defining a method foo, i.e. no underscore prefix is needed anymore. Setting pybindgen.settings.deprecated_virtuals to True will force the old virtual method behaviour. But this is really deprecated; newer code should set pybindgen.settings.deprecated_virtuals to False. In PyBindGen 0.14, if the option pybindgen.settings.deprecated_virtuals is not set, PyBindGen emits a warning and assumes the value of True in order to preserve backward compatibility. In PyBindGen 0.15, the default value of this option will change to False, and in 0.16 the support for deprecated virtuals will be removed. This change was made to make the user code interface more intuitive, and to align it with other Python bindings tools such as SIP, Boost.Python, and SWIG. -- Gustavo J. A. M. Carneiro INESC Porto, UTM, WiN, http://win.inescporto.pt/gjc "The universe is always one step beyond logic." -- Frank Herbert

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execnet-1.0.5 released: doc & finalization fixes
by holger krekel 07 Feb '10

07 Feb '10

execnet is a small and stable pure-python library for working with local or remote clusters of Python interpreters, with ease. It supports seamless instantiation of and interaction with remote interpreters through the 'ssh' command line tool. It supports Python 2.4-3.1, Jython-2.5.1 and pypy-c. The 1.0.5 release is a minor backward compatible release with these changes: - more care during receiver-thread finalization during interp-shutdown, should get rid of annoying and meaningless exceptions - fix glitch in ssh-fileserver example - experimentally add "setup.py test" support - will run py.test More info here: http://codespeak.net/execnet cheers, holger --

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[RELEASED] Python 2.7 alpha 3
by Benjamin Peterson 06 Feb '10

06 Feb '10

On behalf of the Python development team, I'm cheerful to announce the third alpha release of Python 2.7. Python 2.7 is scheduled (by Guido and Python-dev) to be the last major version in the 2.x series. Though more major releases have not been absolutely ruled out, it's likely that the 2.7 release will an extended period of maintenance for the 2.x series. 2.7 includes many features that were first released in Python 3.1. The faster io module, the new nested with statement syntax, improved float repr, set literals, dictionary views, and the memoryview object have been backported from 3.1. Other features include an ordered dictionary implementation, unittests improvements, a new sysconfig module, and support for ttk Tile in Tkinter. For a more extensive list of changes in 2.7, see http://doc.python.org/dev/whatsnew/2.7.html or Misc/NEWS in the Python distribution. To download Python 2.7 visit: http://www.python.org/download/releases/2.7/ Please note that this is a development release, intended as a preview of new features for the community, and is thus not suitable for production use. The 2.7 documentation can be found at: http://docs.python.org/2.7 Please consider trying Python 2.7 with your code and reporting any bugs you may notice to: http://bugs.python.org Enjoy! -- Benjamin Peterson 2.7 Release Manager benjamin at python.org (on behalf of the entire python-dev team and 2.7's contributors)

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