Mailman 3 November 2009 - Python-announce-list

[ANN] Pyjamas 0.7pre1 Web Widget Set and python-to-javascript Compiler released
by Luke Kenneth Casson Leighton 04 Nov '09

04 Nov '09

Current Release: 0.7~pre1 --------------- This is a 0.7 prerelease of Pyjamas, to invite users to help test the latest version. The latest svn is regularly but informally tested against the regression tests and the examples, and used in production, but not extensively tested against all known browsers on each commit. Community assistance by running against a wider range of browsers ensures that *you* get a stable release. Pyjamas ------- Pyjamas is a port of Google Web Toolkit to Python, and thus enables the development of Rich Media AJAX applications in Python, with no need for special browser plugins. Pyjamas contains a stand-alone python-to-javascript compiler, and also a Widget Set API that looks very similar to Desktop Widget Set APIs (such as PyQT4 or PyGTK2). Pyjamas also contains a Desktop Widget Set version, running as pure python. Using web browser technology provides an alternative to PyQT4 and PyGTK2 that has the advantage of having full support for HTML, CSS, Plugin and other web-related features already built-in. For the windows port, this can save users around 30mb of downloads, as MSHTML is preinstalled as part of IE. For more information, see: http://pyjs.org http://pyjs.org/FAQ.html http://pyjs.org/features.html Known bugs: http://code.google.com/p/pyjamas/issues #290, #227, #228, #230, #304 Changelog Summary ----------------- Features and enhancements of the stand-alone 0.7 series javascript compiler include: * the addition of generators (support for yield, by rewriting the function so that it can be re-called and continue from the previous state); * the beginnings of decorators support, and support for properties; * some dramatic performance improvements due to a rewrite of for-loops; * improved support for import syntax (from . import module); * the addition of a built-in AST parser, use of which allows python 2.4 to compile programs with python 2.5 / 2.6 syntax into javascript; * addition of int and long types, and support for operator functions, so that e.g list multiplication by numbers and list addition now work, along with coercion between int, float and long types, and support for floating point exceptions. Overall, this release is a significant "pythonic" upgrade: for full details, see the CHANGELOG. In the User-Interface suite, which is separate from the Pyjamas stand-alone python-to-javascript compiler, the features and enhancements include: * An SVG / VML Canvas Library (a port of GWTCanvas). This has been ported to pure python, and consequently work under Pyjamas-Desktop as well. * A Graphical Chart Library (a port of GChart). This has been ported to pure python, and consequently work under Pyjamas-Desktop as well. For the same speed optimisations present in GChart, GChart for Pyjamas can also use the python port of GWTCanvas. * An internal restructure of Event handling, similar to GWT 1.7, providing Focus, Mouse and Click "Mixin" modules so that developers creating their own widgets have a minimal amount of work to do. This redesign could only take place once Pyjamas supported multiple inheritance (added in 0.6). Pyjamas-Desktop --------------- Pyjamas runs your application in a Web Browser (as javascript); Pyjamas-Desktop runs exactly the same python application on the Desktop (as python) http://pyjd.org Release 0.6 of Pyjamas incorporated Pyjamas-Desktop directly into the Pyjamas Distribution. To use Pyjamas-Desktop there are three choices, with more planned [MacOSX PyObjC; KDE's PyKHTML]. All ports of Pyjamas-Desktop will require a JSON library to be installed: as there are plenty already, it is counter-productive to write yet another one. Simplejson is recommended. 1) - XULRunner install hulahop and python-xpcom. hulahop is distributed with both Debian and Ubuntu; python-xpcom is part of XULRunner and is also distributed with both Debian and Ubuntu. Other users should investigate the installation instructions for python-xpcom and hulahop for the operating system of their choice on the appropriate web sites. GNU/Linux, FreeBSD and other POSIX systems are strongly advised to use XULRunner for Pyjamas-Desktop: it is the most stable of the PyJD ports. 2) - PyWebKitGtk you will need a patched version of pywebkitgtk: http://code.google.com/p/pywebkitgtk/issues/detail?id=13 you will need a patched version of webkit: http://github.com/lkcl/webkit/16401.master Detailed build instructions are available here: http://wiki.github.com/lkcl/webkit/helping-with-16401master 3) - MSHTML For Windows users, all that's required, other than installing python and Internet Explorer, is one further package: Win32 "comtypes". Win32 "comtypes" can be downloaded here: * http://sourceforge.net/projects/comtypes/

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execnet-1.0.0b1: connecting Py2/Py3/Jython interpreters
by holger krekel 03 Nov '09

03 Nov '09

Hi everybody! i just uploaded a first public release of execnet, namely 1.0.0b1 to PyPI. Grab it with easy_install/pip on your favourite Python environment (also works by unpacking the tarball with or without plain distutils). execnet allows to ad-hoc instantiate local and remote Python interpreters, currently Python2.4, 2.5, 2.6 and (new) also Python 3.1, Jython and PyPy-c. It works on Windows, Linux and OSX. With execnet you can instantiate "gateways" between Python processes, use "remote_exec" code execution and "channels" to perform structured data communication. See here for more info: http://codespeak.net/execnet Here is a list of changes from the rather internal 1.0.0alpha2 to the now public 1.0.0b1 release: * added new examples for NumPy, Jython, IronPython * improved documentation * include apipkg.py for lazy-importing * integrated new serializer code from Benjamin Peterson * improved support for Jython-2.5.1 have fun and let me know if you have issues, holger -- Metaprogramming, Python, Testing: http://tetamap.wordpress.com Python, PyPy, pytest contracting: http://merlinux.eu

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Open Technology Group, Inc. announces Advanced Python Training
by Chander Ganesan 03 Nov '09

03 Nov '09

Morrisville, NC (PRWEB) November 3, 2009 -- Open Technology Group, Inc. announces Advanced Python Training. The Open Technology Group (OTG), a leader in the development and delivery of training solutions centered about Open Source technologies, released the latest in its set of Open Source Python training courses - Advanced Python Programming (http://www.otg-nc.com/advanced-python-training). Designed for programmers looking to leverage advanced features of Python, or develop fast, efficient, and scalable software with Python, this Python course covers a wide range of advanced python related topics, including: object-oriented python programming; exception handling; python generators and decorators; regular expressions; networking with sockets; multi-threading, multi-processing, and coordination of operations between processes; signal handling; networking with Twisted; XML processing; and leveraging the Python unittest module. The Advanced Python Programming course is a mix of lecture, demonstration, and hands-on exercises. "We've taken some of the most popular advanced components of Python and integrated them into this course with hands-on examples and exercises," said Chander Ganesan, President. The Advanced Python Programming course is available for immediate delivery, worldwide. The new class is available for both public enrollment and customized, affordable, on-site delivery to small groups (3 or more students) worldwide. ABOUT OPEN TECHNOLOGY GROUP, INC. Founded in 2004 and headquartered in Morrisville, NC, the Open Technology Group, Inc. (OTG) has established itself as the leading provider of training solutions centered about Open Source software and solutions. With its comprehensive library of in-house developed intellectual property, OTG is able to deliver comprehensive, customized, and structured training covering a wide range of software solutions. The Open Technology Group offers affordable customized on-site technology training worldwide, as well as public-enrollment courses delivered in over 10 locations, nationwide. For more information, and a complete course catalog, visit us online at http://www.otg-nc.com, or contact us at 877-258-8987.

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probability sequencing language 1.04 has been released
by edexter 03 Nov '09

03 Nov '09

probability sequencing language is a text based piano roll type programming language for csound. some may refer to it as a pre processor for csound. For version 1.04 a bug has been fixed alowing floating point numbers for the step number macros are now available loaded from external files. frequencies can now have drift where they change on every pass. the latest files are always available here http://dexrowem.blogspot.com/search?q=probility+sequencing+language

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Python-URL! - weekly Python news and links (Nov 3)
by Gabriel Genellina 03 Nov '09

03 Nov '09

QOTW: "I consider "import *" the first error to be fixed ..." - Robert Kern, author of PyFlakes, a potential replacement for Pylint and Pychecker, on his personal style http://groups.google.com/group/comp.lang.python/msg/5bf77b21b3b0caf2 Python 2.6.4 is out; it fixes some small but important bugs in previous 2.6.3 release: http://groups.google.com/group/comp.lang.python/t/44f4c166de5e6703/ PEP391: A new way to configure Python logging, using dictionaries: http://groups.google.com/group/comp.lang.python/t/3fc3138c22a50678/ Why do you use Python? http://groups.google.com/group/comp.lang.python/t/66ccb10d2da5b740/ Is there any value in forcing one class/function per module? (long thread): http://groups.google.com/group/comp.lang.python/t/1e0c1e2091539512/ A review of complex solutions to an almost inexistent problem shows constructive criticism in action: http://groups.google.com/group/comp.lang.python/t/d218212cabe9670b/ A user module may shadow a standard module of the same name - is it avoidable? http://groups.google.com/group/comp.lang.python/t/b31f74b6145c9d94/ copy.deepcopy() is not as "deep" as its name implies: http://groups.google.com/group/comp.lang.python/t/d827fd118189fe01/ A long thread about Web development: why to use templates, and why frameworks actually do help developers: http://groups.google.com/group/comp.lang.python/t/367025d4d9a2e15d/ Using a module as a place to store application global settings: http://groups.google.com/group/comp.lang.python/t/23e21edf1b232b32/ A simple list comprehension question leads to discuss mutability, identity, and Cousin Chuy's Super-Burritos: http://groups.google.com/group/comp.lang.python/t/17cfd91ece6ed54f/ Combining map, zip and filter into an equivalent list comprehension: http://groups.google.com/group/comp.lang.python/t/259976305282b0c0?q=map timeit: make sure you actually measure what you want, and not other code: http://groups.google.com/group/comp.lang.python/t/7ecae76e11f720ee/ Why do compiled C extensions on Windows use '.pyd' in their name instead of '.dll'? http://groups.google.com/group/comp.lang.python/t/c8d93871cc5f31dc/ Pyfora, a web forum about Python, was lauched recently. Will this fragment the community? http://groups.google.com/group/comp.lang.python/t/e6e0d99c995da697/ A guy's future book on programming Python doesn't fit standard practice (a long thread!): http://groups.google.com/group/comp.lang.python/t/6918784f36d147d2/ ======================================================================== 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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[ANN] stdeb 0.4.2
by Andrew Straw 02 Nov '09

02 Nov '09

stdeb produces Debian source packages from Python packages via a new distutils command, sdist_dsc. Automatic defaults are provided for the Debian package, but many aspects of the resulting package can be customized via a configuration file. An additional command, bdist_deb, creates a Debian binary package, a .deb file. stdeb: http://github.com/astraw/stdeb This email announces release 0.4.2. download: http://pypi.python.org/pypi/stdeb/0.4.2 Release 0.4.2 is a bugfix release fixing a couple issues. The most significant fix is that if a package specified "XS-Python-Version" in stdeb.cfg, the binary package wouldn't install the Python packages. No backwards incompatible changes were made with this release.

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IMGCrush 0.4.0 and IMGCrush_GUI 0.4.0 released
by kiithsacmp＠gmail.com 02 Nov '09

02 Nov '09

Announcing IMGCrush 0.4.0 and IMGCrush_GUI 0.4.0 , a new release bringing new features and bugfixes, as well as considerable speedup (even though it's still quite slow) IMGCrush is an image compressor capable of compressing files to user specified size or quality using common web image formats particularly well suited to optimize images for web sites. IMGCrush_GUI is a simple Tkinter GUI using basic subset of IMGCrush options. It should be replaced by a more advanced GTK or Qt GUI in future. Get IMGCrush and IMGCrush_GUI here: https://launchpad.net/icrush/+download (IMGCrush_GUI is on the bottom of the page) New features: -Recursive directory processing -Multiprocessing -GIF bit depths from 1 to 8 support -JPG grayscale support -deprecated (and removed some) resizing options Note that at this moment IMGCrush is still quite slow and experimental. More info: https://launchpad.net/icrush

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PiCloud Beta Release
by Ken Elkabany 01 Nov '09

01 Nov '09

PiCloud has released a Python library, cloud, which allows you to easily offload the execution of a function to a cluster of servers running on Amazon Web Services. As a beta product, we are currently free to all users who sign up with beta code "PYTHONLIST". To register, go to http://www.picloud.com Any comments or feedback would be greatly appreciated. Full service description: PiCloud is a cloud-computing platform that integrates into the Python Programming Language. It enables you to leverage the compute power of Amazon Web Services without having to manage, maintain, or configure virtual servers. PiCloud integrates seamlessly into your existing code base through a custom Python library, cloud. To offload the execution of a function to the cloud, all you must do is pass your desired function into the cloud library. PiCloud will then run the function on its high-performance and automatically-scaling cluster. We quickly scale our server capacity, both up and down, to meet your computational needs, and only charge you for the resources you actually consume. Getting on the cloud has never been this easy! PiCloud improves the full cycle of software development and deployment. Functions that are run on PiCloud have their resource usage monitored, performance analyzed, and errors traced; we further aggregate all your functions to give you a bird's eye view of your service. Through these introspective capabilities, PiCloud enables you to develop faster, easier, and smarter. Common use cases for our platform: * Crawling the web * Manipulating images and videos * Generating charts and graphs * Statistical/Mathematical analysis of data sets * Real-time data processing Cheers, Ken Elkabany PiCloud, Inc.

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ANN: blist 1.0.2
by Daniel Stutzbach 01 Nov '09

01 Nov '09

blist 1.0.2 is now available: http://pypi.python.org/pypi/blist/ What is blist? -------------- The blist is a type that looks, acts, and quacks like a Python list, but has better asymptotic performance when inserting or deleting elements (O(log n)). For small lists, blists and the built-in list have very similar performance. The blist also features copy-on-write behavior, so copying or taking large slices from a list is inexpensive. What's new? ----------- blist version 1.0.2 includes two important bug fixes: - Fixed a crash in the .index method, which was not properly sanitizing the optional arguments. - Fixed a possible crash when modifying the blist during iteration Other changes include: - Changed int to Py_ssize_t in several places for better 64-bit hygiene - Removed some over-zealous assertion checks that were causing crashes in oddball (but legal!) cases in debug builds - Ported tests to run under Python 2.6 and Python 3.1 (but no longer Python 2.5) - Got rid of warnings on non-ix86 platforms -- Daniel Stutzbach, Ph.D. President, Stutzbach Enterprises, LLC <http://stutzbachenterprises.com>

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Distribute 0.6.7 released
by Tarek Ziadé 01 Nov '09

01 Nov '09

On behalf of the Distribute team, I am pleased to announce the 0.6.7 release of Distribute. Distribute is a fork of the Setuptools project, and the 0.6.x series a drop-in replacement for Setuptools. Distribute is intended to replace Setuptools as the standard method for working with Python module distributions, on the top of Distutils. This release is as usual, availabe at PyPI: http://pypi.python.org/pypi/distribute Most noticeable changes in 0.6.7 are: - now the develop command supports the --user option, so it can use the per-user site packages (PEP 370) - the generated scripts now wrap their call to the script entry point in the standard "if name == 'main'" - better errors handling in PackageIndex when files and pages are visited by easy_install - a virtualenv-compatible version, so the next virtualenv release will be able to provide a --distribute option. You can visit http://pypi.python.org/pypi/distribute#id2 for a full CHANGES list. We are now starting the 0.6.8 work in parallel of 0.7.x development, with more bugfixes coming up. More info: - documentation : http://packages.python.org/distribute - tracker: http://bitbucket.org/tarek/distribute/issues/ Regards Tarek -- Tarek Ziadé | http://ziade.org | オープンソースはすごい! | 开源传万世，因有你参与

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