We are proud to present a new Python package:

sympycore - an efficient pure Python Computer Algebra System

Sympycore is available for download from

http://sympycore.googlecode.com/

Sympycore is released under the New BSD License.

Sympycore provides efficient data structures for representing symbolic
expressions and methods to manipulate them. Sympycore uses a very
clear algebra oriented design that can be easily extended.

Sympycore is a pure Python package with no external dependencies, it
requires Python version 2.5 or higher to run. Sympycore uses Mpmath
for fast arbitrary-precision floating-point arithmetic that is
included into sympycore package.

Sympycore is to our knowledge the most efficient pure Python
implementation of a Computer Algebra System. Its speed is comparable
to Computer Algebra Systems implemented in compiled languages. Some
comparison benchmarks are available in

* http://code.google.com/p/sympycore/wiki/Performance

* http://code.google.com/p/sympycore/wiki/PerformanceHistory

This is a Content Management System built on Python & itools, among
other features ikaaro provides:

- content and document management (index&search, metadata, etc.)
- multilingual user interfaces and content
- high level modules: wiki, forum, tracker, etc.

This release brings a number of usability enhancements. Most important,
the old HTML editor derived from Epoz [1] has been replaced by TinyMCE
[2].

[1] http://iungo.org/products/Epoz/
[2] http://tinymce.moxiecode.com/

Resources
---------

Download
http://download.ikaaro.org/ikaaro/ikaaro-0.20.4.tar.gz

Home
http://www.ikaaro.org/ikaaro

Mailing list
http://mail.ikaaro.org/mailman/listinfo/itools

Version 1.4 of dateutil is out:

http://labix.org/python-dateutil

Changes since 1.3
-----------------

- Fixed another parser precision problem on conversion of decimal seconds
to microseconds, as reported by Erik Brown. Now these issues are gone
for real since it's not using floating point arithmetic anymore.

- Fixed case where tzrange.utcoffset and tzrange.dst() might fail due
to a date being used where a datetime was expected (reported and fixed
by Lennart Regebro).

- Prevent tzstr from introducing daylight timings in strings that didn't
specify them (reported by Lennart Regebro).

- Calls like gettz("GMT+3") and gettz("UTC-2") will now return the
expected values, instead of the TZ variable behavior.

- Fixed DST signal handling in zoneinfo files. Reported by
Nicholas F. Fabry and John-Mark Gurney.

What is it?
-----------

There was a bug in release 4.5.1 of ConfigObj, so there is now an
updated release:

* `ConfigObj 4.5.2 <http://www.voidspace.org.uk/python/
configobj.html>`_
* `Validate 0.3.2 <http://www.voidspace.org.uk/python/validate.html>`_

The bug affected the use of ``None`` as a default value in configspecs
and is now fixed.

What are ConfigObj and Validate?
=========================

**ConfigObj** is a simple to use but powerful configuration file
management library.
Features include:

* Nested sections to any depth
* Unicode support
* List and multiline values
* Integrated with a powerful validation system

- including automatic type checking/conversion
- repeated sections
- and allowing default values

Hi everyone, we are beginning to accept papers for PyCon Italia Due,
the second edition of the italian python conference. This year the
conference will be held from 9th till 11th May in Florence in Italy.

The first day of the conference (9th May) will start at Palazzo
Vecchio in the afternoon with an opening Keynote by Richard
Stallman. The next days instead the conference will be at the
Viva Hotel Laurus near the Duomo.

Thanks for the attention!

Call for papers (http://www.pycon.it/pycon2/cfp-en)
=====================================================

Papers
---------

The conference is structured on three parallel tracks: Discovering
Python, Spreading Python and Learning Python:

* Discovering Python: will primarily focus on introductory topics
about Python libraries, framework and technologies;

* Spreading Python: will instead focus both on advanced technical
topics and parallel arguments like development methodologies,
real-world use cases and management techniques;

QOTW: "I think not enough is made of the fact that Python combines legibility
and power better than any other platform." - Michael Tobis
http://mail.python.org/pipermail/advocacy/2008-February/000518.html

"C++ is a compile-time, type-checked language, which means it is totally
safer for newbies than Python. Yep, your big company is totally safe with
newbie C++ programmers." - Carl Banks

Python 2.5.2 final released:
http://groups.google.com/group/comp.lang.python/browse_thread/thread/51e4846fd2b.../

An article in CIO.com about Python in the enterprise inspires a long
thread which compares Python to other languages:
http://groups.google.com/group/comp.lang.python/browse_thread/thread/c1af9a1a8eb.../

The 2007 LinuxQuestions.org Members Choice Awards selects Python as
Programming Language of the Year.
http://www.linuxquestions.org/questions/2007-linuxquestions.org-members-choice-awards.../

Why double underscores are used internally:
http://groups.google.com/group/comp.lang.python/browse_thread/thread/554c125c858.../

Function overloading (dispatching by argument type):
http://groups.google.com/group/comp.lang.python/browse_thread/thread/745fd73f322.../

The eigth alpha release of cgkit2 is available at http://cgkit.sourceforge.net

What is it?
-----------

The Python Computer Graphics Kit is an Open Source software package
containing a collection of Python modules, plugins and utilities that
are meant to be useful for any domain where you have to deal with 3D
data of any kind, be it for visualization, creating photorealistic
images, Virtual Reality or even games.

What's new?
-----------

- New module "cri" that contains a ctypes-based RenderMan binding
- New module "mayabinary" to parse Maya Binary (.mb) files
- Various smaller fixes and additions (see the changelog for a full
list)

For more information, visit:

http://cgkit.sourceforge.net

- Matthias -

Pygoo alpha 0.1 released. Pygoo is a SPARK [1] parser that generates
ElementTree representations of Tkinter widget specifications which are
then fed to a modified version of effbot's XML-to-Tkinter function [2]
to render actual widgets.

You can use it to create Tkinter widgets without having to build them
programatically. There is also provision for automatically connecting
callbacks to the widgets.

I made this for another project, but I thought it might be interesting
or useful enough for others so I cleaned it up a bit and am releasing
it to the public on the GPL. If you check it out please let me know
what you think. (Feel free to file issues on the googlecode site.)

There are some demos bundled with the source, that and the language
spec on the googlecode wiki should get you started.

http://www.pygoo.com/
http://code.google.com/p/pygoo/
http://pygoo.googlecode.com/files/pygoo-0.1.tgz
http://code.google.com/p/pygoo/wiki/LittleLanguageSyntax

[1] http://pages.cpsc.ucalgary.ca/~aycock/spark/
[2] http://effbot.org/zone/element-tkinter.htm

Of course I forgot to add the URL:

http://shedskin.googlecode.com

Mark Dufour.

Hi all,

I have just released Shed Skin 0.0.27. Thanks in large part to the
GHOP students, this new release comes with some interesting new
goodies:

- support for 're', via libpcre (perl-compatible-regular-expressions)
- support for 'time' (except for time.strptime under Windows)
- basic support for 'staticmethod' and 'property'
- support for 'fnmatch', 'glob' (bootstrapped)
- improved support for 'os' (POSIX)
- OSX support again (including extension modules!)
- many fixes for multi-dir/multi-file projects
- several builtin optimizations (zip, list(str)..)
- type model for 'datetime' (no C++ implementation yet)
- split up compiler core, ss.py, into several files
- many minor bugfixes

As for the 4 new modules (re, time, fnmatch, glob), this means Shed
Skin now supports most of the following modules: