Mailman 3 December 2005 - Python-announce-list

ANN: enum 0.4 - Enumerations in Python
by Ben Finney 20 Dec '05

20 Dec '05

Howdy all, I've uploaded enum 0.4 to the Cheeseshop. <URL:http://cheeseshop.python.org/pypi/enum/> Main changes: Comparing values from an enumeration against a value not from the same enumeration will now succeed (previous versions raised an exception):: >>> from enum import Enum >>> Weekdays = Enum('sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat') >>> pizza_night = Weekdays.fri >>> pizza_night == Weekdays.fri True >>> pizza_night == Weekdays.tue False >>> pizza_night == "fri" False >>> pizza_night == 5 False This is done by using the ``NotImplemented`` return value for the comparison against values that are not from the same enumeration. The Python interpreter will then attempt other fallbacks instead of failing. This allows the values from an enumeration to be sequenced or compared among heterogeneous values, such as a list:: >>> things = [23, Weekdays.tue, "spam"] >>> things.sort() >>> Weekdays.tue in things True >>> Weekdays.fri in things False Package description: """Robust enumerated type support in Python This package provides a module for robust enumerations in Python. An enumeration object is created with a sequence of string arguments to the Enum() constructor:: >>> from enum import Enum >>> Colours = Enum('red', 'blue', 'green') >>> Weekdays = Enum('mon', 'tue', 'wed', 'thu', 'fri', 'sat', 'sun') The return value is an immutable sequence object with a value for each of the string arguments. Each value is also available as an attribute named from the corresponding string argument:: >>> pizza_night = Weekdays[4] >>> shirt_colour = Colours.green The values are constants that can be compared only with values from the same enumeration; comparison with other values will invoke Python's fallback comparisons. >>> pizza_night == Weekdays.fri True >>> shirt_colour > Colours.red True >>> shirt_colour == "green" False Each value from an enumeration exports its sequence index as an integer, and can be coerced to a simple string matching the original arguments used to create the enumeration:: >>> str(pizza_night) 'fri' >>> shirt_colour.index 2 """ -- \ "It ain't so much the things we don't know that get us in | `\ trouble. It's the things we know that ain't so." -- Artemus | _o__) Ward (1834-67), U.S. journalist | Ben Finney

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cx_Freeze 3.0.2
by Anthony Tuininga 19 Dec '05

19 Dec '05

What is cx_Freeze? cx_Freeze is a set of utilities for freezing Python scripts into executables using many of the techniques found in Thomas Heller's py2exe, Gordon McMillan's Installer and the Freeze utility that ships with Python itself. Where do I get it? http://starship.python.net/crew/atuining http://www.computronix.com/utilities.shtml (it may be a few days before the second site is updated) What's new? 1) Add support for compressing the byte code in the zip files that are produced. 2) Add better support for the win32com package as requested by Barry Scott. 3) Prevent deletion of target file if it happens to be identical to the source file. 4) Include additional flags for local modifications to a Python build as suggested by Benjamin Rutt. 5) Expanded instructions for building cx_Freeze from source based on a suggestion from Gregg Lind. 6) Fix typo in help string. Anthony Tuininga

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[ANN] Release 0.53 of Task Coach
by Frank Niessink 19 Dec '05

19 Dec '05

Hi all, I'm pleased to announce release 0.53 of Task Coach. New in this release: Bugs fixed: * On some platforms, Python and wxPython seem to disagree on what the maximum integer is. The maximum integer is used to set the maximum and minimum allowed priority values. Fixed by allowing priority values between the rather arbitrary minimum and maximum values of -1000000000 and 1000000000. * Fixed exception: "wx._core.PyAssertionError: C++ assertion "ucf.GotUpdate()" failed in ..\..\src\msw extctrl.cpp(813): EM_STREAMIN didn't send EN_UPDATE?". This seems to be a bug in wxPython 2.6.0 and 2.6.1. Patch provided by Franz Steinhaeusler. Features added: * Columns in the effort view are hideable too, just like columns in the task views. See 'View' -> 'Effort columns', or right-click a column header in the effort view. * Added possibility to mail tasks via your default mailer, see 'Task' -> 'Mail task' or right-click a task in one of the task views. * Added option to minimize the window when you attempt to close the application via the close button on the window title bar or the system menu. See 'Edit' -> 'Preferences' -> 'Window behavior'. What is Task Coach? Task Coach is a simple task manager that allows for hierarchical tasks, i.e. tasks in tasks. Task Coach is open source (GPL) and is developed using Python and wxPython. You can download Task Coach from: http://taskcoach.niessink.com https://sourceforge.net/projects/taskcoach/ A binary installer is available for Windows XP, in addition to the source distribution. Note that Task Coach is alpha software, meaning that it is wise to back up your task file regularly, and especially when upgrading to a new release. Cheers, Frank

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mrquery: finds duplicate images
by Edward C. Jones 19 Dec '05

19 Dec '05

I have uploaded "mrquery.05.12.19.tgz"' to my web page "http://members.tripod.com/~edcjones/pycode.html". "mrquery" finds the duplicate images in a collection of images. It implements a variant of the algorithm in "Fast Multiresolution Image Querying" by Charles E. Jacobs, Adam Finkelstein and David H. Salesin. Search for "mrquery.pdf" at Citeseer or on the Internet. The mrquery algorithm has been implemented elsewhere. Especially check out "imgSeek" at "http://imgseek.python-hosting.com/". I order to use this program, you need: Familiarity with the standard UNIX commands Linux (other UNIX systems may work) Python 2.4 or later (2.2 or 2.3 may work) Experience programming with Python To know how to compile C programs (preferably with gcc) Warning: this program is new, buggy and command-line oriented.

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ANN: DecInt 0.4 - Arithmetic for very large decimal integers
by casevh＠comcast.net 19 Dec '05

19 Dec '05

DecInt is a class that support arithmetic on very large decimal integers. CHANGES Version 0.4 fixes a critical bug in version 0.3b. All users should upgrade! I have also created Windows binaries for GMPY that are specifically tuned for AMD 32-bit processors and the Intel Pentium 4 processors. These are experimental; I am not able to test them. WHAT DecInt can calculate the decimal form of the 42nd Mersenne prime, all 7,816,230 digits, in less than 21 seconds. And less than 6 seconds if gmpy 1.01 is available. Multiplication used a combination of 4-way Toom-Cook and Nussbaumer convolution. Pure Python multiplication is only 10x slower than GMP's hand optimised assembler code! Division uses a new algorithm based on David M. Smith's division algorithm. Pure Python division is 16x slower than GMP but can actually be faster in some instances; for example, dividing a 2,000,000 digit number by an 800,000 digit number. DecInt can be found at http://home.comcast.net/~casevh/ Enjoy, casevh

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cx_Oracle 4.1.2
by Anthony Tuininga 19 Dec '05

19 Dec '05

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://starship.python.net/crew/atuining What's new? 1) Restore support of Oracle 9i features when using the Oracle 10g client. Anthony Tuininga

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itools 0.12.0 released
by "J. David Ibáñez" 19 Dec '05

19 Dec '05

itools is a Python library, it groups a number of packages into a single meta-package for easier development and deployment: itools.catalog itools.i18n itools.web itools.cms itools.ical itools.workflow itools.csv itools.resources itools.xhtml itools.datatypes itools.rss itools.xliff itools.gettext itools.schemas itools.xml itools.handlers itools.tmx itools.html itools.uri The twelfth release defines an inflection point in the development of itools, to celebrate it we start writing "release notes" for the first time. The ikaaro CMS (Content Management System), that before was distributed as a separate Zope package, has now been included in itools as "itools.cms". And it does not requires Zope anymore (note that the ZODB and PIL packages are still needed). The new script "icms.py" makes it easier than ever to deploy and manage an ikaaro instance. Type "icms.py --help" for an start. On other news, Hervé Cauwelier has been working hard to deploy a new sexy skin for ikaaro. Codenamed Aruni, the new skin, alongside of major improvements to the user interface, makes of this release an important milestone in the road for prime-time use. A demo is online for a taste, http://demo.ikaaro.org (login as admin/admin). And last but not least, the new top package "itools.csv" implements a higher level API to work with CSV files. Brought to you by Piotr Macuk. For a more detailed list of the changes see the CHANGES.txt file, or go directly to the Changelog file. Resources --------- Download http://www.ikaaro.org/download/itools/itools-0.12.0.tar.gz Home http://www.ikaaro.org/itools Mailing list http://in-girum.net/mailman/listinfo/ikaaro Bug Tracker http://in-girum.net/cgi-bin/bugzilla/index.cgi -- J. David Ibáñez Itaapy <http://www.itaapy.com> Tel +33 (0)1 42 23 67 45 9 rue Darwin, 75018 Paris Fax +33 (0)1 53 28 27 88

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ANN: Pythonutils 0.2.5
by Fuzzyman 19 Dec '05

19 Dec '05

`Pythonutils 0.2.5 <http://www.voidspace.org.uk/python/pythonutils.html>`_ is now available. **Pythonutils** is a pure-Python package containing several modules that help with common programming tasks in Python. This new release updates to : * **ConfigObj** 4.1.0 * **odict** 0.2.1 * **validate** 0.2.1 * **pathutils** 0.2.4 * **cgiutils** 0.3.5 (Also included are standout and urlpath - which haven't been updated since the last release).

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Ordered Dictionary 0.2.1
by Fuzzyman 18 Dec '05

18 Dec '05

There is a new version of `odict <http://www.voidspace.org.uk/python/odict.html>`_ - the ordered dictionary. **What Is It ?** This module provides two classes ``OrderedDict``, and ``SequenceOrderedDict``. The ordered dictionary is a dictionary-like object (actually a subclass of the normal dictionary data type) that keeps keys in insertion order. This means it has all the normal dictionary methods. Methods that would normally return values in an arbitrary order are now ordered. You can specify and alter the order, through the setkeys method. Because an ordered dictionary is something like a sequence, it also has several sequence methods. The SequenceOrderedDict allows you to act on the keys, values, and items directly - as if they were sequences. This is convenient if you want to treated your object more like a sequence than a dictionary. **What Has Changed ?** This is a major change since the *0.1.0* series. ``OrderedDict`` now has several sequence methods - including allowing slicing, slice assignment, and slice deletion. .. note:: ``OrderedDict`` *is* compatible with Python 2.2. Slicing isn't - mainly because you can't index a seqeuence with a slice object in Python 2.2. It also has a subclass called ``SequenceOrderedDict`` that has custom, callable sequence-like objects, for ``items``, ``keys``, and ``values``. You can call them liek the methods they replace, or act on them directly as sequences to change the contents of your dictionary. *Other changes:* You can now test for equality and inequality with objects (except for dictionaries for which it is undefined). This allows you to do tests like : :: OrderedDict() == False Added the ``strict`` keyword, which raises a ``ValueError`` if you do slice assignment with keys that are already in the dictionary. Assignment to keys in ``SequenceOrderedDict`` is now only for re-ordering the keys. Fixed bug where slice assignment to keys could lose information. (and optimised by slicing ranges to get the indexes we are assigning to instead of indexing each key). You change ``keys``, ``items``, and ``values`` through new methods ``setkeys``, ``setitems``, and ``setvalues`` methods. Minor changes, thanks to Christoph Zwerschke for suggestions. Added ``__deepcopy__`` method (previously deepcopy failed). Changed use of slice to types.SliceType for Python 2.2. Fixed bugs in ``__getattr__`` and popitem Optimisation in ``OrderedDict.__init__`` when creating an instance from an ``OrderedDict``. Implemented new ``__repr__``. Version 0.2.0 Added index to ``OrderedDict.popitem`` Implemented ``SequenceOrderedDict``, which has keys, items, values as custom, callable, sequence objects. By Michael Foord - from suggestions on comp.lang.python Hidden the ``sequence`` attribute Implemented slicing (including deleting a slice and assigning to a slice) Implemented sequence methods ``sort``, ``reverse``, ``insert``, ``index``.

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ANN: ConfigObj 4.1.0 and Validate 0.2.1
by Fuzzyman 18 Dec '05

18 Dec '05

**ConfigObj 4.1.0** and **Validate 0.2.1** are now available. {sm;:-)} ConfigObj and validate have both had moderately big updates. **What are they ?** `ConfigObj <http://www.voidspace.org.uk/python/configobj.html>`_ is a simple but powerful config file reader and writer: an *ini file round tripper*. Its main feature is that it is very easy to use, with a straightforward programmer's interface and a simple syntax for config files. It supportes nested sections, preserves the order of keys and sections, list values, multiple line values, etc. `validate <http://www.voidspace.org.uk/python/validate.html>`_ integrates with ConfigObj (but can also be used standalone) to check that values meet a certain specification. This can be used to validate a config file, *and* convert values to the expected type. **What Has Changed?** Configobj: Added a ``merge`` method. This allows easy merging together of several config files (e.g. merging user values on top of a default one). A new ``flatten_errors`` function to turn the resutls dictionary from ``validate`` into a flat list of errors. Added merge, a recursive update. Added preserve_errors to validate and the flatten_errors example function. Thanks to Matthew Brett for suggestions and helping me iron out bugs. Fixed bug where a config file is all comment, the comment will now be initial_comment rather than final_comment. Validation no longer done on the 'DEFAULT' section (only in the root level). This allows interpolation in configspecs. Also use the new list syntax in validate 0.2.1. (For configspecs). Validate: A new list syntax for checks. Fixed bug so we can handle keyword argument values with commas. We now use a list constructor for passing list values to keyword arguments (including default) : :: default=list("val", "val", "val")

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