Python-announce-list July 2008

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49 participants
57 discussions

ETS 3.0.0b1 released!
by Dave Peterson 31 Jul '08

31 Jul '08

Hello, I am very pleased to announce that ETS 3.0.0b1 has just been tagged and released! All ETS sub-projects, including Traits, Chaco, Mayavi, and Envisage, have been tagged and released in one form or another (alpha, beta, final) as part of this effort. All ETS projects have now been registered with PyPi and source tarballs have been uploaded! As a result, for the first time ever, you can now easy_install all of ETS via a simple command like: easy_install ETS Or, alternatively, you can get only specific projects with commands like: easy_install Mayavi Or easy_install Chaco We anticipate the final release of ETS 3.0, and all of its sub-projects at their current version number, in a matter of weeks. Please join us in helping make this final release the most robust release it can be by participating in this beta shakeout period. Discussions about the status of ETS and its sub-projects happens on the enthought-dev mailing list, who's home page is at: https://mail.enthought.com/mailman/listinfo/enthought-dev Thank you to all who have worked so hard on making this release possible! -- Dave Enthought Tool Suite --------------------------- The Enthought Tool Suite (ETS) is a collection of components developed by Enthought and open source participants, which we use every day to construct custom scientific applications. It includes a wide variety of components, including: * an extensible application framework * application building blocks * 2-D and 3-D graphics libraries * scientific and math libraries * developer tools The cornerstone on which these tools rest is the Traits package, which provides explicit type declarations in Python; its features include initialization, validation, delegation, notification, and visualization of typed attributes. More information is available for all the packages within ETS from the Enthought Tool Suite development home page at http://code.enthought.com/projects/tool-suite.php. Testimonials ---------------- "I set out to rebuild an application in one week that had been developed over the last seven years (in C by generations of post-docs). Pyface and Traits were my cornerstones and I knew nothing about Pyface or Wx. It has been a hectic week. But here ... sits in front of me a nice application that does most of what it should. I think this has been a huge success. ... Thanks to the tools Enthought built, and thanks to the friendly support from people on the [enthought-dev] list, I have been able to build what I think is the best application so far. I have built similar applications (controlling cameras for imaging Bose-Einstein condensate) in C+MFC, Matlab, and C+labWindows, each time it has taken me at least four times longer to get to a result I regard as inferior. So I just wanted to say a big "thank you". Thank you to Enthought for providing this great software open-source. Thank you for everybody on the list for your replies." — Gaël Varoquaux, Laboratoire Charles Fabry, Institut d’Optique, Palaiseau, France "I'm currently writing a realtime data acquisition/display application … I'm using Enthought Tool Suite and Traits, and Chaco for display. IMHO, I think that in five years ETS/Traits will be the most comonly used framework for scientific applications." — Gary Pajer, Department of Chemistry, Biochemistry and Physics, Rider University, Lawrenceville NJ

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[ANNOUNCE] Traits 3.0 has been released
by Dave Peterson 30 Jul '08

30 Jul '08

Hello, I am very pleased to announce that Traits 3.0 has just been released! All Traits projects have been registered with PyPi (aka The Cheeseshop) and each project's listing on PyPi currently includes a source tarball. In the near future, we will also upload binary eggs for Windows and Mac OS X platforms. Installation of Traits 3.0 is now as simple as: easy_install Traits The Traits projects include: http://pypi.python.org/pypi?:action=display&name=Traits&version=3.0.0 http://pypi.python.org/pypi?:action=display&name=TraitsGUI&version=3.0.0 http://pypi.python.org/pypi?:action=display&name=TraitsBackendQt&version=3.… http://pypi.python.org/pypi?:action=display&name=TraitsBackendWX&version=3.… The Traits project is at the center of all Enthought Tool Suite development and has changed the mental model used at Enthought for programming in the already extremely efficient Python programming language. We encourage everyone to join us in enjoying the productivity gains from using such a powerful approach. The Traits project allows Python programmers to use a special kind of type definition called a trait, which gives object attributes some additional characteristics: * Initialization: A trait has a default value, which is automatically set as the initial value of an attribute before its first use in a program. * Validation: A trait attribute's type is explicitly declared. The type is evident in the code, and only values that meet a programmer-specified set of criteria (i.e., the trait definition) can be assigned to that attribute. * Delegation: The value of a trait attribute can be contained either in the defining object or in another object delegated to by the trait. * Notification: Setting the value of a trait attribute can notify other parts of the program that the value has changed. * Visualization: User interfaces that allow a user to interactively modify the value of a trait attribute can be automatically constructed using the trait's definition. (This feature requires that a supported GUI toolkit be installed. If this feature is not used, the Traits project does not otherwise require GUI support.) A class can freely mix trait-based attributes with normal Python attributes, or can opt to allow the use of only a fixed or open set of trait attributes within the class. Trait attributes defined by a classs are automatically inherited by any subclass derived from the class. -- Dave

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jsonpickle 0.0.5
by John Paulett 30 Jul '08

30 Jul '08

All, I would like to announce jsonpickle 0.0.5. http://code.google.com/p/jsonpickle/ jsonpickle allows for any Python object to be serialized into JSON. This library acts as an extension to simplejson. Whereas simplejson only serializes primitive objects (str, int, float, list, dict, etc), jsonpickle can handle most non-builtin Python objects. jsonpickle recursively examines Python objects and collections (dictionaries, lists, tuples, and sets), and converts non primitive objects to a primitive version. This module is the result of a desire to store model objects into CouchDB, with no upfront specification of field mapping. jsonpickle has been tested primarily with the Universal Feed Parser and CouchDB. Feedback on other systems that do not properly serialize is greatly appreciated! =================================== >>> import jsonpickle >>> from jsonpickle.tests.classes import Thing # Create an object. >>> obj = Thing('A String') >>> print obj.name A String # Use jsonpickle to transform the object into a JSON string. >>> pickled = jsonpickle.dumps(obj) >>> print pickled {"child": null, "classname__": "Thing", "name": "A String", "classmodule__": "jsonpickle.tests.classes"} # Use jsonpickle to recreate a Python object from a JSON string >>> unpickled = jsonpickle.loads(pickled) >>> print unpickled.name A String # The new object has the same type and data, but essentially is now a #copy of the original. >>> obj == unpickled False >>> obj.name == unpickled.name True >>> type(obj) == type(unpickled) True # If you will never need to load (regenerate the Python class from # JSON), you can pass in the keyword unpicklable=False to prevent extra # information from being added to JSON. >>> oneway = jsonpickle.dumps(obj, unpicklable=False) >>> print oneway {"name": "A String", "child": null} =================================== License: New BSD Discussion Group: http://groups.google.com/group/jsonpickle Thanks, John Paulett john(a)7oars.com Blog: http://blog.7oars.com/

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ANN: Google custom search for Python
by Gerard Flanagan 30 Jul '08

30 Jul '08

What is it? -------------- A Google custom search engine which targets only the following sites: + `The Hazel Tree <http://thehazeltree.org>`__ + `The Python standard library docs <http://docs.python.org/lib>`__ + `The Python wiki <http://wiki.python.org>`__ + `Python Package Index <http://pypi.python.org/pypi>`__ Where can I access it? ------------------------------ The home page of the search engine is here: http://www.google.com/coop/cse?cx=002031040340806163079:nkigkp_irqk As well as accessing it from its home page, you can link to it from your own web sites, or add it as a gadget to your Google home page (if you have one) - see the above link for details. No ads --------- `The Hazel Tree <http://thehazeltree.org>`__ is a not-for-profit site and no ads will appear in the search results. Using refinements ------------------------- To refine the search to any of the individual sites, you can specify a refinement using the following labels: stdlib, wiki, pypi, thehazeltree So, to just search the python wiki, you would enter: somesearchterm more:wiki and similarly: somesearchterm more:stdlib somesearchterm more:pypi somesearchterm more:thehazeltree About http://thehazeltree.org --------------------------------------- `The Hazel Tree <http://thehazeltree.org/>`__ is a collection of popular Python texts that I have converted to reStructuredText and put together using `Sphinx <http://sphinx.pocoo.org>`__. It's in a publishable state, but not as polished as I'd like, and since I'll be mostly offline for the next month it will have to remain as it is for the present. However, the search engine is ready now and the clock is ticking on its subscription (one year, renewal depending on success of site), so if it's useful to anyone, it's all yours (and if you use it on your own site a link back to http://thehazeltree.org would be appreciated). Cheers, G.

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NEW CMS for Python
by :-) 30 Jul '08

30 Jul '08

HI I am Glad to announce you that I am creating New CMS for Python. I'll post it after Python 3 release. Currently I only the Developer/Team Lead/Project Lead/Organization :) It would be Very lightweight Fast Easy to Use Ajax Enabled new?? Done. Please send me how U expect your new CMS would be? Cheers Vinoth

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ANN: cssutils 0.9.5final
by Christof Hoeke 30 Jul '08

30 Jul '08

what is it ---------- A Python package to parse and build CSS Cascading Style Sheets. (Not a renderer though!) release ------- 0.9.5 had been in development for about half a year and this is the first *final* release for quite some time now - actually the last has been 0.6 ... It is nevertheless definitely not perfect but tests have been expanded, included scripts should all work and all examples on the website have been checked. 0.9.6 will start soon ... main changes ------------ 0.9.5 080730 - **API CHANGE**: If a new medium is trying to be appended to a ``MediaList`` already set to ``all`` an ``xml.dom.InvalidModificationErr`` is raised. The exception to this handling is adding ``handheld`` which is a special case for Opera and kept for now. This special handling may be removed in the future. A ``WARNING`` is logged in any case. - **BUGFIX**: Fixed reference error in @import rule preventing change of the used ``MediaList``. - **BUGFIX**: Deeply nested ``CSSImportRule``\ s with different encodings should keep the encoding as defined (via HTTP, parendSheet, @charset etc) now. Therefor ``cssutils.util._readUrl`` does return ``(encoding, enctype, decodedCssText)`` now where ``enctype`` is a number from 0 to 5 indicating which encoding type was used: 0 for encoding override, 1 for HTTP encoding, 2 for BOM or @charset rule, (3 is unused currently), 4 for encoding of the parent sheet and 5 if encoding defaults to UTF-8 as no other information is available. (This may later be done as constants but this function should not be used from programs generally). - **BUGFIX**: Replaced usage of ``WindowsError`` with ``OSError``. I (naively ;) thought ``WindowsError`` at least be present in environments other than Windows but it just results in a ``NameError``... The part of the API which triggered this Exception is an @import rule with an invalid or local (file) URI so should have happened quite rarely anyway. + IMPROVEMENT: Standalone scripts ``csscombine`` and ``csscapture`` are available for programmatic use in ``cssutils.script.csscombine`` and ``cssutils.script.CSSCapture`` res. + IMPROVEMENT: ``cssutils.script.csscombine`` and ``csscombine`` script do use the cssutils log now instead of just writing messages to ``sys.stderr`` + IMPROVEMENT: Optimized and refactored tokenizer (CHARSET_SYM). Note: CSSValue, CSSValueList, and CSSPrimitiveValue and the relevant methods/properties Property.cssValue and CSSStyleDeclaration.getPropertyCSSValue are more or less DEPRECATED and will probably be replaced with interfaces defined in CSSOM. For now use the properties and methods that handle values as simple strings, e.g. ``Property.value``. As the aforementioned classes are not hardly that useful anyway this should not be a big problem but please beware if you use or have used them. If you think this a bad idea please let me know! license ------- cssutils is published under the LGPL version 3 or later, see http://cthedot.de/cssutils/ If you have other licensing needs please let me know. download -------- For download options see http://cthedot.de/cssutils/ cssutils needs Python 2.4 or higher (tested with Python 2.5.2 on Vista only) Bug reports (via Google code), comments, etc are very much appreciated! Thanks. Christof

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Public Pythn Classs, September 9, 2008
by Steve Holden 29 Jul '08

29 Jul '08

Holden Web is please to announce its third public "Introduction to Python" class, near Washington DC, from September 9-11. Further details are available from http://holdenweb.com/py/training/ We are also interested in adding to our course repertoire. If you have ideas for suitable one-day classes please visit http://holdenweb.blogspot.com/2008/07/one-day-python-classes.html and leave a comment on that page. regards Steve -- Steve Holden +1 571 484 6266 +1 800 494 3119 Holden Web LLC http://www.holdenweb.com/

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ANN: PyCon UK Talks and Tutorials List Up
by Fuzzyman 28 Jul '08

28 Jul '08

PyCon UK 2008 is the second PyCon event in the UK, and is being held on 12th to 14th September at the Birmingham Conservatoire. The conference starts with a day of tutorials on the Friday. The timetable for the tutorials day has now been published: http://www.pyconuk.org/timetable.html Abstracts for the talks, tutorials and BOFs are also now up: http://www.pyconuk.org/talk_abstracts.html The early bird rate is still open (but not for too much longer): http://www.pyconuk.org/booking.html We are almost there with the schedule, the plenary sessions will include Lightning talks as well as keynotes from Mark Shuttleworth and Ted Leung. We may be accepting a couple more talks if we can squeeze them in somewhere. (If you are expecting to give a talk but have not given us an abstract, then please give it to us ASAP) Michael Foord and the other PyCon UK Organisers

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Python-URL! - weekly Python news and links (Jul 28)
by Gabriel Genellina 28 Jul '08

28 Jul '08

QOTW: "Python's goals are to maximize opportunities for good programming, which is quite different." - Bruno Desthuilliers, contrasting Python with Java Load and initialize dynamic plugins from a directory: http://groups.google.com/group/comp.lang.python/browse_thread/thread/ba8d36… Importing different versions of a module: http://groups.google.com/group/comp.lang.python/browse_thread/thread/9039a7… Some details on the CPython VM implementation: http://groups.google.com/group/comp.lang.python/browse_thread/thread/d36bc1… "Real languages are written in C#, not decadent C" (or something like that ...): http://groups.google.com/group/comp.lang.python/browse_thread/thread/355439… The different 64bits architectures supported by different Python implementations: http://groups.google.com/group/comp.lang.python/browse_thread/thread/b8bcb7… Looking for a "scanf" replacement: http://groups.google.com/group/comp.lang.python/browse_thread/thread/26a24e… Python and tail-call optimization: http://groups.google.com/group/comp.lang.python/browse_thread/thread/25ff95… A long thread against the "Explicit is better than implicit" principle: http://groups.google.com/group/comp.lang.python/browse_thread/thread/a5fa8f… ======================================================================== 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 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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Elisa Media Center 0.5.3 Release
by Florian Boucault 28 Jul '08

28 Jul '08

Dear Elisa users, This mail announces the release of Elisa Media Center 0.5.3 codenamed "Attraction". Installers and sources can be downloaded from http://elisa.fluendo.com/download/ Features added since 0.5.2: - iPod support has been improved: it shows the available Artists then the Albums of the selected artist. - Pluggable devices support on Linux has been fixed: USB hard drives, iPods and such are browsable from Elisa - The Music section hierarchy has been reworked and now starts with Music Library containing entries to browse your music collection by albums, artists, genres, release date, or folders - A new playlists entry has been added to the Music section containing automatically created playlists: Most Listened Tracks, Most Recently Added Tracks, Most Recently Listened Tracks - Shoutcast radio station names are now automatically cleaned up based on custom heuristics - GNOME screensaver is automatically deactivated when Elisa is playing - Important improvements were made in the performance department most notably on all the list and grid widgets There are still some known issues in this release and we are working on solving them as fast as possible: - Audio Visualization does not work on Windows - Audio CD are not detected - DAAP support missing Have a nice day, The Elisa team

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Python-announce-list July 2008