Mailman 3 June 2010 - Python-announce-list

[ANN] PyDbLite 2.5, a pure-Python db engine + Pythonic interface to SQLite and MySQL
by Pierre Quentel June 6, 2010

June 6, 2010

Hi all, Version 2.5 of PyDbLite has just been released PyDbLite is * a fast, pure-Python, untyped, in-memory database engine, compatible with Python 2.3 and above, using Python syntax to manage data, instead of SQL * a pythonic interface to SQLite and MySQL, using the same syntax as the pure-Python engine for most operations (except database connection and table creation because of each database specificities) This version greatly improves the SQLite and MySQL modules : - defining classes for the connection, database and table levels of these engines - allowing engine-specific parameters in table creation - better management of date and datetime types with SQLite The pure-Python engine is portable on all environments with a Python interpreter. It is as fast, and even faster than SQLite for small to medium sets of data. Being in-memory, it is obviously not adapted to huge amounts of data, which are best managed with SQLite and MySQL Home page : http://www.pydblite.net/ Documentation : http://www.pydblite.net/en/index.html Group (new : be the first to ask questions !) : http://groups.google.com/group/pydblite Downloads : http://sourceforge.net/project/platformdownload.php?group_id=210258 Enjoy, Pierre

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ANN: mpmath 0.15 released
by Fredrik Johansson June 6, 2010

June 6, 2010

Hi all, Version 0.15 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/0.15 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/). The versions in Sage and SymPy will be updated soon. For details about the new features in this version, see the following blog post and the changelog: http://fredrik-j.blogspot.com/2010/06/announcing-mpmath-015.html http://mpmath.googlecode.com/svn/tags/0.15/CHANGES Briefly, besides many small fixes, 0.15 includes large performance improvements for transcendental functions, new code for computing the nontrivial zeros of the Riemann zeta function (contributed by Juan Arias de Reyna), and many new special functions (including generalized 2D hypergeometric series, q-functions, and new elliptic functions). Support for complex interval arithmetic has also been added. Extensive documentation is available at: http://mpmath.googlecode.com/svn/trunk/doc/build/index.html (or equivalently) http://mpmath.googlecode.com/svn/tags/0.15/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, Fredrik Johansson

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ANN: cssutils 0.9.7b2
by Christof June 6, 2010

June 6, 2010

what is it ---------- A Python package to parse and build CSS Cascading Style Sheets. (Not a renderer though!) about this release ------------------ 0.9.7b2 is a beta release but quite stable... main changes ------------ 0.9.7b2 100606 + IMPROVEMENT/BUGFIX: CSSFunction value parameters may contain HASH values like ``#fff`` now. These are used in experimental properties like ``-moz-linear-gradient(top,#fff,#fff 55%,#e4e4e4)``. Fixes issue #38. + API CHANGE: ``cssutils.ser.prefs.resolveVariables == True`` is the default from 0.9.7b2 as CSSVariables are not in any official specification yet and better reflects what you probably want after serializing a stylesheet... 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 or Jython 2.5 and higher (tested with Python 2.6.5(x64), 2.5.4(x32), 2.4.4(x32) and Jython 2.5.1 on Win7 64 only) Bug reports (via Google code), comments, etc are very much appreciated! Thanks. Christof

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ANN: PiCloud cloud library 1.9 release
by Ken Elkabany June 6, 2010

June 6, 2010

PiCloud, a cloud computing platform for the Python Programming Language, has released version 1.9 of its client library, cloud. PiCloud enables Python users to leverage the power of an on-demand, high performance, and auto scaling compute cluster with as few as three lines of code! No server management necessary. You can find out more here: http://www.picloud.com What's New: * Store your data files on the cloud using our cloud.files interface! * Greatly reduced the cloud library's memory and cpu usage when sending large data. * Map jobs begin processing before cloud.map() returns--large performance gains. * Persistent user processes has in many cases reduced function overhead by over 50%. * Increased network protocol reliability. * Profiling is now disabled by default, but can be enabled with the _profile keyword. * Bug fixes, and much more! 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 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: * Scientific computing * Video and image encoding * Statistical analysis of data sets * Real-time data processing * Charts and graphs generation Cheers, Ken Elkabany PiCloud, Inc.

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[RELEASE] Python 2.7 release candidate 1 released
by Benjamin Peterson June 6, 2010

June 6, 2010

On behalf of the Python development team, I'm effusive to announce the first release candidate 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. However, 2.7 will have an extended period of bugfix maintenance. 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/ While this is a preview release and is thus not suitable for production use, we strongly encourage Python application and library developers to test the release with their code and report any bugs they encounter to: http://bugs.python.org/ This helps ensure that those upgrading to Python 2.7 will encounter as few bumps as possible. 2.7 documentation can be found at: http://docs.python.org/2.7/ Enjoy! -- Benjamin Peterson Release Manager benjamin at python.org (on behalf of the entire python-dev team and 2.7's contributors)

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[ANN] BleachBit 0.8.0 released
by Andrew Ziem June 5, 2010

June 5, 2010

BleachBit (a pure PyGTK app) deletes traces of online Internet usage and recovers wasted disk space. Highlight of changes since 0.7.4: * Add feature to whitelist files and folders, so they will not be deleted or modified * Add Tamil translation * Add Faroese translation * Support Thunderbird 3 as found on Ubuntu 10.04 * Delete recent documents in GNOME 2.28 - 2.30 Detailed release notes http://bleachbit.sourceforge.net/news/bleachbit-080-released Download http://bleachbit.sourceforge.net/download

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Wing IDE 3.2.8 released: Adds Python 2.7 support
by Wingware June 4, 2010

June 4, 2010

Hi, Wingware has released version 3.2.8 of Wing IDE, an integrated development environment designed specifically for the Python programming language. This release includes the following minor features and improvements: * Support for Python 2.7 * Partially updated French localization of the GUI (thanks to Jean Sanchez) * Avoid hanging up the debugger in some Python code * Fixed VI mode copy/paste, p after yj and dj, and Ctrl-S to save * Correctly analyze 'with' statements and dictionary comprehensions * Fixed help() in the shells under Python 3.x * Reopen project after patch installation at startup * Several other minor bug fixes See the change log at http://wingware.com/pub/wingide/3.2.8/CHANGELOG.txt for details *Downloads* Wing IDE Professional and Wing IDE Personal are commercial software and require a license to run. A free trial license can be obtained directly from the product when launched. Wing IDE 101 can be used free of charge. Wing IDE Pro 3.2.8 http://wingware.com/downloads/wingide/3.2 Wing IDE Personal 3.2.8 http://wingware.com/downloads/wingide-personal/3.2 Wing IDE 101 3.2.8 http://wingware.com/downloads/wingide-101/3.2 *About Wing IDE* Wing IDE is an integrated development environment designed specifically for the Python programming language. It provides powerful editing, testing, and debugging features that help reduce development and debugging time, cut down on coding errors, and make it easier to understand and navigate Python code. Wing IDE can be used to develop Python code for web, GUI, and embedded scripting applications. Wing IDE is available in three product levels: Wing IDE Professional is the full-featured Python IDE, Wing IDE Personal offers a reduced feature set at a low price, and Wing IDE 101 is a free simplified version designed for teaching entry level programming courses with Python. Version 3.2 of Wing IDE Professional includes the following major features: * Professional quality code editor with vi, emacs, and other keyboard personalities * Code intelligence for Python: Auto-completion, call tips, goto-definition, error indicators, smart indent and rewrapping, and source navigation * Advanced multi-threaded debugger with graphical UI, command line interaction, conditional breakpoints, data value tooltips over code, watch tool, and externally launched and remote debugging * Powerful search and replace options including keyboard driven and graphical UIs, multi-file, wild card, and regular expression search and replace * Version control integration for Subversion, CVS, Bazaar, git, Mercurial, and Perforce * Integrated unit testing with unittest, nose, and doctest frameworks * Many other features including project manager, bookmarks, code snippets, OS command integration, indentation manager, PyLint integration, and perspectives * Extremely configurable and may be extended with Python scripts Please refer to the feature list at http://wingware.com/wingide/features for a detailed listing of features by product level. System requirements are Windows 2000 or later, OS X 10.3.9 or later for PPC or Intel (requires X11 Server), or a recent Linux system (either 32 or 64 bit). Wing IDE supports Python versions 2.0.x through 3.1.x and Stackless Python. For more information, see http://wingware.com/products *Purchasing and Upgrading* Wing 3.2 is a free upgrade for all Wing IDE 3.0 and 3.1 users. Version 2.x licenses cost 1/2 the normal price to upgrade. Upgrade a 2.x license: https://wingware.com/store/upgrade Purchase a 3.x license: https://wingware.com/store/purchase -- The Wingware Team Wingware | Python IDE Advancing Software Development www.wingware.com

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ANN: SimPy 2.1.0 simulation package
by Klaus G. Muller June 4, 2010

June 4, 2010

It is my pleasure to announce the release of SimPy 2.1.0. It is ready for download at https://sourceforge.net/projects/simpy/ and PyPi ( http://pypi.python.org/pypi/SimPy/2.1.0 ). SimPy 2.1.0 is a major new version, with a refactored code base, two powerful API additions, additional documentation and bug fixes. 2.1.0 is fully backward compatible with 2.0.1 and earlier versions. What is SimPy? ~~~~~~~~~~~~~~ SimPy (= Simulation in Python) is a process-based discrete-event simulation package based on Simula and implemented in Python. It is released under the GNU LGPL. Many users say that SimPy is one of the easiest to use discrete event simulation packages. It provides the modeler with components of a simulation model. These include processes, for active components like customers, messages, and vehicles, and resources, for passive components that form limited capacity congestion points like servers, checkout counters, and tunnels. It also provides monitor variables to aid in gathering statistics. SimPy has plotting and GUI capabilities "out of the box". It comes with extensive documentation, tutorials and a large number of example models. Dependencies ~~~~~~~~~~~~ SimPy 2.1.0 works with Python 2.3 and later versions. It does not work with Python 3.x. SimPy also works with Jython and IronPython, with the exception of SimPy's plotting and GUI capabilities. Change notes ============ Here are the changes to the previous SimPy production release (2.0.1): Additions ~~~~~~~~~ - A function `step` has been added to the API. When called, it executes the next scheduled event. - Another new function is `peek`. It returns the time of the next event. By using `peek` and `step` together, one can easily write e.g. an interactive program to step through a simulation event by event. - A simple interactive debugger ``stepping.py`` has been added. It allows stepping through a simulation under user control, viewing the event list, skipping to a process' next event, etc. - Versions of the Bank tutorials using the advanced object-oriented API have been added. - A new document describes tools for gaining insight into and debugging SimPy models. Very useful for learning and teaching SimPy. Changes ~~~~~~~ - Major re-structuring of SimPy code, resulting in much less SimPy code -- great for the maintainers. - Checks have been added which test whether entities belong to the same `Simulation` instance. - The `Monitor` and `Tally` methods `timeAverage` and `timeVariance` now calculate only with the observed time-series. - Changed class `Lister` so that circular references between objects no longer lead to stack overflow and crash. Bug repairs ~~~~~~~~~~~ - Functions ``allEventNotices`` and ``allEventTimes`` are working again. - Error messages for methods in SimPy.Lib work again. Acknowledgements =============== The great code refactoring was done by Ontje Lünsdorf, with key inputs from Stefan Scherfke. Thanks, guys! I also thank the other developers and users for their inputs and support in defining SimPy 2.1.0. Now, go ahead, download SimPy 2.1.0 and enjoy! Send any feedback, bug reports, etc. to the SimPy Users mailing list (simpy-users(a)lists.sourceforge.net). Klaus Müller

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ANN: Twiggy 0.2, a more Pythonic logger
by Pete June 2, 2010

June 2, 2010

Hiya- I'm pleased to announce the initial public release of Twiggy, a more Pythonic logger. It was conceived at Pycon, at the prodding of Jesse Noller. It features: * a clean, powerful syntax for logging using method chaining * loose coupling between log targets and emitters * glue vaguely inspired by Django's url dispatcher * easy support for structured logging * fixes for your personal pet peeves * features! For a quick introduction, see: http://python-twiggy.googlecode.com/hg/notes.html For a longer discussion and demo, see: http://carlfk.blip.tv/file/3551150/ Get it hot from the cheeseshop: http://pypi.python.org/pypi/Twiggy/ Feedback, help and donuts are always welcome. --Pete

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