Mailman 3 August 2010 - Python-announce-list

Python Ireland presents Sept talks @ The Science Gallery (Wed, 8th Sept, 7pm)
by Vicky Twomey-Lee Aug. 25, 2010

Aug. 25, 2010

Hi All, What's on:- - Buildout by Diarmuid Bourke - Python for Cloud Computing by Alan Kennedy - Lightning talks - Pub TBD afterwards The event is open for all and it's free. More details at: http://www.python.ie/meetup/2010/sept_2010_talks__the_science_gallery/ Cheers, /// Vicky ~~~~~~~~~~~~~~~~~~~~~~~~~ ~~ http://irishbornchinese.com ~~ ~~ http://www.python.ie ~~ ~~~~~~~~~~~~~~~~~~~~~~~~~

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ANN: Cython 0.13 released!
by Craig Citro Aug. 25, 2010

Aug. 25, 2010

It is with *great* pleasure that I email to announce the release of Cython version 0.13! This release sets another milestone on the path towards Python compatibility and brings major new features and improvements for the usability of the Cython language. Download it here: http://cython.org/release/Cython-0.13.tar.gz == New Features == * Closures are fully supported for Python functions. Cython supports inner functions and lambda expressions. Generators and generator expressions are __not__ supported in this release. * Proper C++ support. Cython knows about C++ classes, templates and overloaded function signatures, so that Cython code can interact with them in a straight forward way. * Type inference is enabled by default for safe C types (e.g. double, bint, C++ classes) and known extension types. This reduces the need for explicit type declarations and can improve the performance of untyped code in some cases. There is also a verbose compile mode for testing the impact on user code. * Cython's for-in-loop can iterate over C arrays and sliced pointers. The type of the loop variable will be inferred automatically in this case. * The Py_UNICODE integer type for Unicode code points is fully supported, including for-loops and 'in' tests on unicode strings. It coerces from and to single character unicode strings. Note that untyped for-loop variables will automatically be inferred as Py_UNICODE when iterating over a unicode string. In most cases, this will be much more efficient than yielding sliced string objects, but can also have a negative performance impact when the variable is used in a Python context multiple times, so that it needs to coerce to a unicode string object more than once. If this happens, typing the loop variable as unicode or object will help. * The built-in functions any(), all(), sum(), list(), set() and dict() are inlined as plain `for` loops when called on generator expressions. Note that generator expressions are not generally supported apart from this feature. Also, tuple(genexpr) is not currently supported - use tuple([listcomp]) instead. * More shipped standard library declarations. The python_* and stdlib/stdio .pxd files have been deprecated in favor of clib.* and cpython[.*] and may get removed in a future release. == Python compatibility == * Pure Python mode no longer disallows non-Python keywords like 'cdef', 'include' or 'cimport'. It also no longer recognises syntax extensions like the for-from loop. * Parsing has improved for Python 3 syntax in Python code, although not all features are correctly supported. The missing Python 3 features are being worked on for the next release. * from __future__ import print_function is supported in Python 2.6 and later. Note that there is currently no emulation for earlier Python versions, so code that uses print() with this future import will require at least Python 2.6. * New compiler directive language_level (valid values: 2 or 3) with corresponding command line options -2 and -3 requests source code compatibility with Python 2.x or Python 3.x respectively. Language level 3 currently enforces unicode literals for unprefixed string literals, enables the print function (requires Python 2.6 or later) and keeps loop variables in list comprehensions from leaking. * Loop variables in set/dict comprehensions no longer leak into the surrounding scope (following Python 2.7). List comprehensions are unchanged in language level 2. == Incompatible changes == * The availability of type inference by default means that Cython will also infer the type of pointers on assignments. Previously, code like this cdef char* s = ... untyped_variable = s would convert the char* to a Python bytes string and assign that. This is no longer the case and no coercion will happen in the example above. The correct way of doing this is through an explicit cast or by typing the target variable, i.e. cdef char* s = ... untyped_variable1 = <bytes>s untyped_variable2 = <object>s cdef object py_object = s cdef bytes bytes_string = s * bool is no longer a valid type name by default. The problem is that it's not clear whether bool should refer to the Python type or the C++ type, and expecting one and finding the other has already led to several hard-to-find bugs. Both types are available for importing: you can use from cpython cimport bool for the Python bool type, and from libcpp cimport bool for the C++ type. == Contributors == Many people contributed to this release, including: * David Barnett * Stefan Behnel * Chuck Blake * Robert Bradshaw * Craig Citro * Bryan Cole * Lisandro Dalcin * Eric Firing * Danilo Freitas * Christoph Gohlke * Dag Sverre Seljebotn * Kurt Smith * Erik Tollerud * Carl Witty -cc

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[ANN] pyxser-1.5r --- Python Object to XML serializer/deserializer
by Daniel Molina Wegener Aug. 24, 2010

Aug. 24, 2010

Hello Python Community. I'm pleased to announce pyxser-1.5r, a python extension which contains functions to serialize and deserialize Python Objects into XML. It is a model based serializer. What can do this serializer? * Serialization of cross references. * Serialization of circular references. * Preserves object references on deserialization. * Custom serializations. * Custom deserializations. * Object attribute selection call-back. * Custom Serialization depth limit. * Standards based serialization. * Standards based XML validation using pyxser XML Schema. * C14N based serialization, as optional kind of output. * Model based XML serialization, represented on XML Schema and XML DTD. This release contains various bug fixes, mainly related to type checking and type handling and also the removal of all memory leaks. The distribution contains working tests for ASCII, Latin-1, UTF-8 and UTF-16 codecs, and a working test which do up to 1,500,000.00 serializations and deserializations, using just 65MB of RAM. Also, on Source Forge I've created two trackers, one for feature requests and another for bug reports. This distribution was tested on Ubuntu 10.04.1 (32bit and 64bit), Mac OS X 10.5.0, CentOS (32bit and 64bit), FreeBSD 8.1 (32bit and 64bit). 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/pyxser/1.5r Best regards, -- Daniel Molina Wegener <dmw [at] coder [dot] cl> System Programmer & Web Developer Phone: +56 (2) 979-0277 | Blog: http://coder.cl/

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ANN: trombi 0.6
by Jyrki Pulliainen Aug. 24, 2010

Aug. 24, 2010

I'm pleased to announce trombi version 0.6. Trombi[1] is an asynchronous CouchDB[2] client library for Facebook's tornado web server[3]. This is the first open source release of trombi, released under the MIT license. It's developed at Inoi Ltd[4], a Finnish software house, and is already used in production environments. Grab it from PyPI[5] or use pip or easy_install: pip install trombi Source and issue tracker are available at GitHub[1]. Have fun! [1] http://github.com/inoi/trombi/ [2] http://couchdb.apache.org/ [3] http://tornadoweb.org/ [4] http://www.inoi.fi/ [5] http://pypi.python.org/pypi/trombi/0.6 -- Jyrki Pulliainen, Inoi Oy

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luban 0.2b2
by Jiao Lin Aug. 24, 2010

Aug. 24, 2010

Luban (http://luban.danse.us) is a python package for building (web) user interface. Features: * Dynamic, ajax-based web user interface can be created using pure python (no knowledge of javascript/ajax/etc is required) * A set of basic and advanced widgets. For example: - document - form - accordion - newsticker - a lot more --- see demo and API of widgets at http://luban.danse.us/aokuang * Multiple user interfaces (web, native) from one source code (the native UI renderer is still experimental) Examples of web applications built by using luban: * vnf (https://vnf.caltech.edu): Virtual neutron facility: A web portal of neutron scattering data analysis and simulation tools * aokuang (http://luban.danse.us/aokuang): A demo of luban API * More at http://docs.danse.us/pyre/luban/sphinx/Demos.html What is new in 0.2 release beta 2? This release has relative few changes compared to beta 1: mostly are bug fixes and answering two most-asked questions: * how to work with existing web frameworks? - See examples at http://docs.danse.us/pyre/luban/sphinx/WebFrameworks.html * internet explorer support? - It works now for IE7 and IE8. For more details: http://docs.danse.us/pyre/luban/sphinx/History.html#changes-0-2b2 Links: * Homepage: http://luban.danse.us * Concepts: http://docs.danse.us/pyre/luban/sphinx/Philosophy.html * Installation: http://docs.danse.us/pyre/luban/sphinx/Installation.html * Demos: http://docs.danse.us/pyre/luban/sphinx/Demos.html * Tutorials: http://docs.danse.us/pyre/luban/sphinx/Tutorials.html * API: http://docs.danse.us/pyre/luban/sphinx/API.html and http://luban.danse.us/aokuang * Roadmap: http://dev.danse.us/trac/luban/roadmap?show=all Bug reports and any comments are very much appreciated! Thanks. -- Jiao Lin linjiao(a)caltech.edu

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pc.py 0.0.3, process control -- easy fork-exec and pipe with I/O redirection
by Anh Hai Trinh Aug. 23, 2010

Aug. 23, 2010

I'd like to announce an early release of pc.py. pc.py is a layer on top of subprocess. The subprocess module supports a rich API but is clumsy for many common use cases, namely sync/async fork-exec, command substitution and pipelining, all of which is trivial to do on system shells. The goal is to make Python a sane alternative to non-trivial shell scripts. Features: * Easy to fork-exec commands, wait or no wait * Easy to capture stdout/stderr of children (command substitution) * Easy to express I/O redirections * Easy to construct pipelines * Use short names for easy interactive typing Documentation is at <http://github.com/aht/pc.py/>. This module depends on Python 2.6, or where subprocess is available. Doctests require /bin/sh to pass. Tested on Linux. This is an alpha release. Expect bugs. -- @chickamade

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Sphinx 1.0.3 released
by Georg Brandl Aug. 23, 2010

Aug. 23, 2010

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi all, I'm happy to announce the release of Sphinx 1.0.3, a bug-fix release in the 1.0 series fixing (among others) a regression in 1.0.2, bug #501. What is it? =========== Sphinx is a tool that makes it easy to create intelligent and beautiful documentation for Python projects (or other documents consisting of multiple reStructuredText source files). Website: http://sphinx.pocoo.org/ What's new in 1.0 (very short version)? ======================================= Lots of stuff; most important of all domains support (see blog post at http://pythonic.pocoo.org/2009/9/12/new-in-sphinx-1-0-domains), new HTML themes, new output formats (manpage, epub). The full list is at <http://sphinx.pocoo.org/latest/changes.html>. cheers, Georg -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.16 (GNU/Linux) iEYEARECAAYFAkxyrXwACgkQN9GcIYhpnLAo3ACdEmTUuilNoKHGI0jYIbPNAuUZ 8ukAn2HFiLdm0cH+b0EFdFJTKbvyBUOu =n4FP -----END PGP SIGNATURE-----

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arithmetic 0.3
by Patricio Paez Aug. 22, 2010

Aug. 22, 2010

Hi all, The third version of module arithmetic has been released, it improves usability. arithmetic is a Python module that allows mixing arithmetic operations and text. It can be used standalone or from an application. A simple Tk-based editor that uses the module is provided as an example of use. Tutorial documents are included, they will quickly show all the features of arithmetic. The module is licensed under the Gnu GPL license version 2 or later. Home http://pp.com.mx/python/arithmetic Download http://pp.com.mx/python/arithmetic/arithmetic-0.3.tar.gz Regards, Patricio Páez <pp(a)pp.com.mx>

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RedNotebook 1.1.1
by Jendrik Seipp Aug. 22, 2010

Aug. 22, 2010

RedNotebook 1.1.1 has been released. You can get the tarball, the Windows installer and links to distribution packages at http://rednotebook.sourceforge.net/downloads.html What is RedNotebook? -------------------- RedNotebook is a **graphical journal** and diary helping you keep track of notes and thoughts. It includes a calendar navigation, customizable templates, export functionality and word clouds. You can also format, tag and search your entries. RedNotebook is available in the repositories of most common Linux distributions and a Windows installer is available. What's new? ----------- * Let user delete category with 'DELETE' key (LP:608717) * Sort categories alphabetically (LP:612859) * Fix: After clicking "Change the text" on an annotation, directly edit it (LP:612861) * Fix: Journal -> _Journal in menu * Fix: Do not clear entry when category is changed in new-entry dialog * Fix: restore left divider position * Fix: Use rednotebook website for retrieving newest version information (LP:621975) * Windows: Shrink installer size * Windows: Update gtk libs * Windows: New theme * Windows: New icons * New translations: * English (United Kingdom) * Norwegian Bokmal * Many translations updated Cheers, Jendrik

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ANN: warehouse Objects in SQLite : y_serial module
by code43 Aug. 21, 2010

Aug. 21, 2010

Module download at SourceForge http://yserial.sourceforge.net Documentation has been revised and v0.60 released. Serialization + persistance :: in a few lines of code, compress and annotate Python objects into SQLite; then later retrieve them chronologically by keywords without any SQL. Most useful "standard" module for a database to store schema-less data. The module is instructive in the way it unifies the standard batteries: sqlite3 (as of Python v2.5), zlib (for compression), and cPickle (for serializing objects). If your Python program requires data persistance, then y_serial is a module which should be worth importing. All objects are warehoused in a single database file in the most compressed form possible. Tables are used to differentiate projects. Steps for insertion, organization by annotation, and finally retrieval are amazingly simple... y_serial.py module :: warehouse Python objects with SQLite http://yserial.sourceforge.net

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