Mailman 3 February 2010 - Python-announce-list

ANN: PyGUI 2.2
by Greg Ewing 06 Feb '10

06 Feb '10

PyGUI 2.2 is available: http://www.cosc.canterbury.ac.nz/greg.ewing/python_gui/ Highlights of this version: - TextEditor component with tabs, scrolling and word wrap - Classes for laying out components in rows, colums and grids - Printing support What is PyGUI? -------------- PyGUI is a cross-platform GUI toolkit designed to be lightweight and have a highly Pythonic API. -- Gregory Ewing greg.ewing(a)canterbury.ac.nz http://www.cosc.canterbury.ac.nz/greg.ewing/

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ANN: mpmath 0.14 released
by Fredrik Johansson 05 Feb '10

05 Feb '10

Hi all, Version 0.14 of mpmath is now available on the website: http://code.google.com/p/mpmath/ It can also be downloaded from the Python Package Index: http://pypi.python.org/pypi/mpmath/0.14 Mpmath is a pure-Python library for arbitrary-precision floating-point arithmetic that implements an extensive set of mathematical functions. It can be used as a standalone library or via SymPy ( http://code.google.com/p/sympy/), and is also available as a standard component of Sage (http://sagemath.org/). For a list of new features, see the blog post and changelog: http://fredrik-j.blogspot.com/2010/02/mpmath-014-released.html http://mpmath.googlecode.com/svn/tags/0.14/CHANGES For a brief summary, the new features in 0.14 include support for using a Cython-based backend soon to be added to Sage (giving a large speedup of mpmath in Sage); support for 3D plotting; fast low-precision functions (using Python's builtin float/complex types); an implementation of the Riemann-Siegel expansion for the Riemann zeta function; many improvements to evaluation of hypergeometric functions; miscellaneous new special functions; matrix functions; and several bugfixes and optimizations. Extensive documentation is available at: http://mpmath.googlecode.com/svn/trunk/doc/build/index.html (or equivalently) http://mpmath.googlecode.com/svn/tags/0.14/doc/build/index.html Bug reports and other comments are welcome on the issue tracker at http://code.google.com/p/mpmath/issues/list or the mpmath mailing list: http://groups.google.com/group/mpmath Enjoy, and extra thanks to Juan Arias de Reyna, Vinzent Steinberg, Jorn Baayen and Chris Smith who contributed to this version. Fredrik Johansson

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ANN: Resolver One 1.8 released
by Giles Thomas 05 Feb '10

05 Feb '10

We're proud to announce that we've just released version 1.8 of Resolver One. This version switches to IronPython 2.6, which gives us support for Python 2.6 syntax along with some serious performance improvements. Resolver One is a Windows-based spreadsheet that integrates Python deeply into its recalculation loop, making the models you build more reliable and more maintainable. In version 1.8, we've worked hard on improving performance above and beyond the gains we got from IronPython 2.6, and we've also added a number of new statistical functions, along with various minor bugfixes and smaller enhancements. You can read more about Resolver One here: <http://www.resolversystems.com/products/resolver-one/> We have a 31-day free trial version, so if you would like to take a look, you can download it from our website: <http://www.resolversystems.com/download/> If you want to use Resolver One in an Open Source project, we offer free licenses for that: <http://www.resolversystems.com/opensource/> Best regards, Giles -- Giles Thomas giles.thomas(a)resolversystems.com +44 (0) 20 7253 6372 17a Clerkenwell Road, London EC1M 5RD, UK VAT No.: GB 893 5643 79 Registered in England and Wales as company number 5467329. Registered address: 843 Finchley Road, London NW11 8NA, UK

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gevent 0.12.0 released
by Denis Bilenko 05 Feb '10

05 Feb '10

gevent is a coroutine-based Python networking library that uses greenlet to provide a high-level synchronous API on top of libevent event loop. Features include: - convenient API around greenlets - familiar synchronization primitives (Event, Queue) - cooperative socket and ssl modules - WSGI server on top of libevent-http - DNS requests done through libevent-dns - monkey patching utility to get pure Python modules, like urllib2, to cooperate Homepage: http://www.gevent.org Download page: http://pypi.python.org/pypi/gevent * changes in 0.12.0 * - The major new feature is a gevent.ssl module, that provides cooperative implementation of the standard ssl module. It does not require any additional extensions on Python ≥ 2.6. It also works on 2.4 and 2.5 if ssl package is installed. The old, PyOpenSSL-based implementation of SSL objects is still available, but the new version is the preferred way now. - The library now compiles and passes most of the relevant tests on Windows. It’s still has a few rough edges (e.g. Ctrl-C is not working), so it should be considered experimental. - The socket object gained some performance improvements as well as a number of bugfixes. - Several incompatibilities of wsgi module with the WSGI spec have been fixed. Read the full changelog entry here: http://www.gevent.org/changelog.html

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cx_Oracle 5.0.3
by Anthony Tuininga 05 Feb '10

05 Feb '10

What is cx_Oracle? cx_Oracle is a Python extension module that allows access to Oracle and conforms to the Python database API 2.0 specifications with a few exceptions. Where do I get it? http://cx-oracle.sourceforge.net What's new? 1) Added support for 64-bit Windows. 2) Added support for Python 3.1 and dropped support for Python 3.0. 3) Added support for keyword arguments in cursor.callproc() and cursor.callfunc(). 4) Added documentation for the UNICODE and FIXED_UNICODE variable types. 5) Added extra link arguments required for Mac OS X as suggested by Jason Woodward. 6) Added additional error codes to the list of error codes that raise OperationalError rather than DatabaseError. 7) Fixed calculation of display size for strings with national database character sets that are not the default AL16UTF16. 8) Moved the resetting of the setinputsizes flag before the binding takes place so that if an error takes place and a new statement is prepared subsequently, spurious errors will not occur. 9) Fixed compilation with Oracle 10g Release 1. 10) Tweaked documentation based on feedback from a number of people. 11) Added support for running the test suite using "python setup.py test" 12) Added support for setting the CLIENT_IDENTIFIER value in the v$session table for connections. 13) Added exception when attempting to call executemany() with arrays which is not supported by the OCI. 14) Fixed bug when converting from decimal would result in OCI-22062 because the locale decimal point was not a period. Thanks to Amaury Forgeot d'Arc for the solution to this problem.

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ANN: ActivePython 2.6.4.10 is now available
by Sridhar Ratnakumar 05 Feb '10

05 Feb '10

I'm happy to announce that ActivePython 2.6.4.10 is now available for download from: http://www.activestate.com/activepython/ This is a minor release with several updates and fixes. Changes in 2.6.4.10 ------------------- - PyPM is now included in 64-bit Windows and Linux builds - Include Distribute instead of setuptools - Include pip - Upgrade to Tcl/Tk 8.5.8 - [Windows] Upgrade to Pywin32 CVS (2009-11-10) - [Windows] Support for OpenSSL in 64-bit - [Windows] Include Tcl/Tk header files - [Windows] Fix broken IDLE on the 64-bit build See the release notes for full details: http://docs.activestate.com/activepython/2.6/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/2.6/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/2.6/ 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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Marave 0.1 -- A relaxing text editor
by ralsina 05 Feb '10

05 Feb '10

Marave is a text editor in the style of Ommwriter or DarkRoom: a full- screen minimalistic interface (most of the time: no interface at all). It's multi-platform and based on PyQt, licensed under the GPL. More information and downloads at http://marave.googlecode.com

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Selenium/SauceLabs Open Space Session at Pycon in Atlanta
by Raymond Hettinger 03 Feb '10

03 Feb '10

The Sauce Labs team, http://saucelabs.com/about/team, is hosting two free tutorial open space sessions at Pycon in Atlanta. In the short session, people bringing their laptops should be able to record a web session in their browser, convert the recorded activity to a Python script, modify the script to accept a number of inputs , and replay the script locally on their laptops. Once you've learned how to fully automate your own browser, submit the same script to the Sauce Labs cloud to run the tests in parallel across multiple browsers and operating systems, and view the results with instant video playback. The tutorials should be of interest to web developers wanting fast, cross-browser testing and it should be of general interest to anyone wanting to use Python to automate browser sessions. The tutorials are being led by Jason Huggins, the creator of Selenium (an open source web app testing tool http://seleniumhq.org/ ). Several familiar names from the Python community will also be on-hand: http://saucelabs.com/about/news/feb-03-2010 Raymond

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Python-URL! - weekly Python news and links (Feb 3)
by Gabriel Genellina 03 Feb '10

03 Feb '10

QOTW: "I think, in the spirit of the topic, they should hold it at both places at the same time." - Brian Blais, on whether the Python Concurrency Workshop, v2.0, should be in Chicago or Denver (in January!) The fastest way to consume an iterable until exhaustion: http://groups.google.com/group/comp.lang.python/t/c1ae3513a31eb63e/ When inheriting from a built-in class, it isn't obvious which of __new__ / __init__ should be overriden: http://groups.google.com/group/comp.lang.python/t/a453c65be4e0f355/ When importing a module, Python may pick the wrong one due to name clashes -- is this avoidable? http://groups.google.com/group/comp.lang.python/t/fe6430e7980e2a96/ Setting a default encoding for 'print' statements: http://groups.google.com/group/comp.lang.python/t/2fb77c8989f63f9d/ Despite its name, the iglob function (in module glob) isn't completely lazy: http://groups.google.com/group/comp.lang.python/t/d9a8617ec85e926d/ list.pop(0) has very poor performance; collections.deque works better in some cases; patch to allow lists to free elements from head (not just from tail): http://groups.google.com/group/comp.lang.python/t/9221d87f93748b3f/ How to parse ill-formed postal addresses: http://groups.google.com/group/comp.lang.python/t/76a4ab9fd7279a4e/ The future of Python 3: Adoption by Linux distros and package maintainers: http://groups.google.com/group/comp.lang.python/t/69463c4b9b1ecd8f/ Library support: http://groups.google.com/group/comp.lang.python/t/ae138cefffed0d6b/ Myths and fallacies: http://groups.google.com/group/comp.lang.python/t/8b8f4a9f999e33e8/ Why choose Python (and not Ruby) in an introductory course to programming: http://groups.google.com/group/comp.lang.python/t/dfe4f6c60032755e/ How an extension module (written in C) may perform cleaning tasks: http://groups.google.com/group/comp.lang.python/t/fbcb22b4401eaef1/ "Really, the built-in scope is just a built-in module called builtins, but you have to import builtins to query built-ins because the name builtins is not itself built-in..." (Lutz & Ascher, 'Programming Python') http://groups.google.com/group/comp.lang.python/t/dc719a4d922f2f87/ A new implementation of the GIL allows for much better performance in multicore architectures: http://groups.google.com/group/comp.lang.python/t/586ef2d3685fa7ea/ After a year of work with relative success, Unladen Swallow (a Google sponsored CPython improvement project) asks to be officially recognized: http://comments.gmane.org/gmane.comp.python.devel/109919 ======================================================================== 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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Mastering Python 3 I/O - In Chicago
by David Beazley 03 Feb '10

03 Feb '10

Just a quick note to let everyone know that there are still a few slots available for this PyCON'2010 tutorial in Chicago. Come find out why you might want to start using Python 3.1. -- Dave Mastering Python 3 I/O ** PyCON'2010 Tutorial Preview in Chicago ** with David Beazley February 5, 2010, 12pm - 5pm http://www.dabeaz.com/chicago/index.html Can't make it to PyCON, but want to attend a cutting-edge tutorial on the latest Python features? Join David Beazley, author of the Python Essential Reference, in Chicago for a preview of his new tutorial "Mastering Python 3 I/O." The goal of this tutorial is to take a top to bottom tour of the Python 3 I/O system and to focus on essential features that you must know if you are ever going to port existing applications to Python 3 or use it for real applications. This tutorial promises to go far beyond what you find in the documentation and books (Dave's included). You'll learn about tricky gotchas, see interesting practical examples, and get a better grasp of how Python 3 is put together. This tutorial preview includes a free copy of the "Python Essential Reference, 4th Ed.", lunch at one of Chicago's finest new restaurants, artisinal pastries and more--all for the same price as a tutorial at PyCON. However, it's strictly limited to 8 attendees. More information is available at: http://www.dabeaz.com/chicago/index.html

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