Mailman 3 November 2010 - Python-announce-list

python-blosc 1.0.3 released
by Francesc Alted Nov. 17, 2010

Nov. 17, 2010

==================================================== Announcing python-blosc 1.0.3 A Python wrapper for the Blosc compression library ==================================================== What is it? =========== Blosc (http://blosc.pytables.org) is a high performance compressor optimized for binary data. It has been designed to transmit data to the processor cache faster than the traditional, non-compressed, direct memory fetch approach via a memcpy() OS call. Blosc works well for compressing numerical arrays that contains data with relatively low entropy, like sparse data, time series, grids with regular-spaced values, etc. python-blosc is a Python package that wraps it. What is new? ============ Blosc has been updated to 1.1.3, allowing much improved compression ratio under some circumstances. Also, the number of cores on Windows platform is detected correctly now (thanks to Han Genuit). Last, but not least, Windows binaries for Python 2.6 and 2.7 are provided (both in 32-bit and 64-bit flavors). For more info, you can see the release notes in: https://github.com/FrancescAlted/python-blosc/wiki/Release-notes Basic Usage =========== # Create a binary string made of int (32-bit) elements >>> import array >>> a = array.array('i', range(10*1000*1000)) >>> bytes_array = a.tostring() # Compress it >>> import blosc >>> bpacked = blosc.compress(bytes_array, typesize=a.itemsize) >>> len(bytes_array) / len(bpacked) 110 # 110x compression ratio. Not bad! # Compression speed? >>> from timeit import timeit >>> timeit("blosc.compress(bytes_array, a.itemsize)", "import blosc, array; \ a = array.array('i', range(10*1000*1000)); \ bytes_array = a.tostring()", \ number=10) 0.040534019470214844 >>> len(bytes_array)*10 / 0.0405 / (1024*1024*1024) 9.1982476505232444 # wow, compressing at ~ 9 GB/s. That's fast! # This is actually much faster than a `memcpy` system call >>> timeit("ctypes.memmove(b.buffer_info()[0], a.buffer_info()[0], \ len(a)*a.itemsize)", "import array, ctypes; \ a = array.array('i', range(10*1000*1000)); \ b = a[::-1]", number=10) 0.10316681861877441 >>> len(bytes_array)*10 / 0.1031 / (1024*1024*1024) 3.6132786600018565 # ~ 3.6 GB/s is memcpy speed # Decompress it >>> bytes_array2 = blosc.decompress(bpacked) # Check whether our data have had a good trip >>> bytes_array == bytes_array2 True # yup, it seems so # Decompression speed? >>> timeit("s2 = blosc.decompress(bpacked)", "import blosc, array; \ a = array.array('i', range(10*1000*1000)); \ bytes_array = a.tostring(); \ bpacked = blosc.compress(bytes_array, a.itemsize)", \ number=10) 0.083872079849243164 > len(bytes_array)*10 / 0.0838 / (1024*1024*1024) 4.4454538167803275 # decompressing at ~ 4.4 GB/s is pretty good too! [Using a machine with 8 physical cores with hyper-threading] The above examples use maximum compression level 9 (default), and although lower compression levels produce smaller compression ratios, they are also faster (reaching speeds exceeding 11 GB/s). More examples showing other features (and using NumPy arrays) are available on the python-blosc wiki page: http://github.com/FrancescAlted/python-blosc/wiki Documentation ============= Please refer to docstrings. Start by the main package: >>> import blosc >>> help(blosc) and ask for more docstrings in the referenced functions. Download sources ================ Go to: http://github.com/FrancescAlted/python-blosc and download the most recent release from here. Blosc is distributed using the MIT license, see LICENSES/BLOSC.txt for details. Mailing list ============ There is an official mailing list for Blosc at: blosc(a)googlegroups.com http://groups.google.es/group/blosc ---- **Enjoy data!** -- Francesc Alted

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[RELEASED] Python 3.2 alpha 4
by Georg Brandl Nov. 16, 2010

Nov. 16, 2010

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On behalf of the Python development team, I'm happy to announce the fourth and (this time really) final alpha preview release of Python 3.2. Python 3.2 is a continuation of the efforts to improve and stabilize the Python 3.x line. Since the final release of Python 2.7, the 2.x line will only receive bugfixes, and new features are developed for 3.x only. Since PEP 3003, the Moratorium on Language Changes, is in effect, there are no changes in Python's syntax and built-in types in Python 3.2. Development efforts concentrated on the standard library and support for porting code to Python 3. Highlights are: * numerous improvements to the unittest module * PEP 3147, support for .pyc repository directories * PEP 3149, support for version tagged dynamic libraries * an overhauled GIL implementation that reduces contention * many consistency and behavior fixes for numeric operations * countless fixes regarding string/unicode issues; among them full support for a bytes environment (filenames, environment variables) * a sysconfig module to access configuration information * a pure-Python implementation of the datetime module * additions to the shutil module, among them archive file support * improvements to pdb, the Python debugger For an extensive list of changes in 3.2, see Misc/NEWS in the Python distribution. To download Python 3.2 visit: http://www.python.org/download/releases/3.2/ 3.2 documentation can be found at: http://docs.python.org/3.2/ Please consider trying Python 3.2 with your code and reporting any bugs you may notice to: http://bugs.python.org/ Enjoy! - -- Georg Brandl, Release Manager georg at python.org (on behalf of the entire python-dev team and 3.2's contributors) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.16 (GNU/Linux) iEYEARECAAYFAkzij74ACgkQN9GcIYhpnLCbtwCgi4whRruM0Oi6yfgjVclYErFa OJcAn0U8UBBsQBFyGcnKJRbls6B+guQ2 =Vuqf -----END PGP SIGNATURE-----

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ANN: mock 0.7.0 beta 4 release
by Fuzzyman Nov. 16, 2010

Nov. 16, 2010

I've released mock 0.7.0 beta 4. This is intended to be the last release of 0.7.0 before the final. http://pypi.python.org/pypi/mock/ (download) http://www.voidspace.org.uk/python/mock/ (documentation) https://code.google.com/p/mock/ (repo and issue tracker) mock is a Python library for simple mocking and patching (replacing objects with mocks during test runs). The "headline features" in 0.7.0 are Python 3 support and the ability to mock magic methods. You can now mock objects that behave like containers or are used as context managers. mock is designed for use with unittest, based on the "action -> assertion" pattern rather than "record -> replay". People are happily using mock with Python test frameworks like nose and py.test. 0.7.0 is a major new release with a bunch of other new features and bugfixes as well. The latest beta is now up on PyPI. 0.7.0 beta 4 is intended to be the last release before 0.7.0 final (read my lips - no new features), so please try it out and report any issues. The work remaining before the final release is updating the documentation, especially the examples, to include the new features. Changes since beta 3 are: * patchers (patch, patch.object and patch.dict) have start and stop methods * Addition of assert_called_once_with method * repr of a mock with a spec includes the class name of the spec * assert_called_with works with python -OO * New spec_set keyword argument to Mock and patch. If this is set, attempting to set an attribute on a mock not on the spec will raise an AttributeError * Attributes and return value of a MagicMock are MagicMock objects * Attempting to set an unsupported magic method now raises an AttributeError * patch.dict works as a class decorator * Switched from subversion to mercurial for source code control * BUGFIX: mocks are now copyable (thanks to Ned Batchelder for reporting and diagnosing this) * BUGFIX: spec=True works with old style classes * BUGFIX: mocksignature=True can now patch instance methods via patch.object For more details, including full changelog since 0.6.0 and examples of using the new start / stop methods on patchers, see the announcement on my blog: http://www.voidspace.org.uk/python/weblog/arch_d7_2010_11_13.shtml#e1193 All the best, Michael Foord

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mekk.rtm 0.6.0
by Marcin Kasperski Nov. 16, 2010

Nov. 16, 2010

mekk.rtm provides both: - yet another Python client for RememberTheMilk API (contrary to two other existing libraries, this one tries to define explicit parameters and provide results of known structure) - a few command-line helpers (massively add/remove tag to all tasks satisfying given query, massively move tasks to another list, import data exported from Nozbe) This is the first release announced here. For more details see: http://pypi.python.org/pypi/mekk.rtm/0.6.0 Source and issue tracker: http://bitbucket.org/Mekk/rtmimport

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pylint 0.22.0 : alpha release of python3.x support
by Emile Anclin Nov. 16, 2010

Nov. 16, 2010

Hello everybody, we are pleased to announce the first Python 3.x compatible Pylint release with version 0.22.0 ! According to this, we also release logilab-common 0.53.0 and logilab-astng 0.21.0. Python3 support --------------- However, the Python3.x support should be considered as an alpha release, since we know that some of the tests don't pass. If you install logilab-common, logilab-astng and pylint from source, you also have to run the 2to3 script by yourself:: find . ! -path "*/test/*py" -name "*py" -exec 2to3-3.1 -wn {} \; If you want to run the tests, remove the -path option, and ask Logilab for support. If you install it from debian packages through logilab repository, it comes with pylint3(-gui) and pyreverse3 executables. Bugfixes -------- Furthermore, as we forgot to announce the Pylint 0.21.4 and logilab-astng 0.20.4 release, let me note that those releases fixed a lot of bugs: Pylint: #37148: Pyreverse fails on twisted.internet #19799: "pylint -blah" exit with status 2 #48066: pylint crashes when redirecting output containing non-ascii #3259: "pylint --disable-all --enable-msg=XYZ file.py" #46772: absolute imports fail depending on module path #46137: disable-report options do not work anymore Astng: #37665, #37868, #33638: E0611 false positive with relative imports #37909: No name 'testing' in module 'srllib' #8969: false positive when importing from zip-safe eggs #20254: odd import name w/ absolute_import activated #46131: Pylint did not recognise decorators usage What is Pylint? --------------- Pylint analyzes Python source code looking for bugs and signs of poor quality. Pylint is a python tool that checks if a module satisfies a coding standard. Pylint is similar to PyChecker but offers more features, like checking line-code's length, checking if variable names are well-formed according to your coding standard, or checking if declared interfaces are truly implemented, and much more. The big advantage with Pylint is that it is highly configurable, customizable, and you can easily write a small plugin to add a personal feature. Pylint is shipped with Pyreverse which creates UML diagrams for python code. -- Emile Anclin <emile.anclin(a)logilab.fr> http://www.logilab.fr/ http://www.logilab.org/ Informatique scientifique & et gestion de connaissances

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Leo 4.8 rc1 released
by Edward K. Ream Nov. 15, 2010

Nov. 15, 2010

Leo 4.8 release candidate 1 is now available at: http://sourceforge.net/project/showfiles.php?group_id=3458&package_id=29106 Leo is a text editor, data organizer, project manager and much more. See: http://webpages.charter.net/edreamleo/intro.html The highlights of Leo 4.8: -------------------------- - Leo now uses the simplest possible sentinel lines in external files. External files with sentinels now look like Emacs org-mode files. - Leo Qt gui now supports Drag and Drop. This was one of the most frequently requested features. - Improved abbreviation commands. You now define abbreviations in Leo settings nodes, not external files. - @url nodes may contain url's in body text. This allows headlines to contain summaries: very useful. - Leo now uses PyEnchant to check spelling. - Leo can now open multiple files from the command line. - Leo's ancient Tangle and Untangle commands are now deprecated. This will help newbies how to learn Leo. - Leo now shows "Resurrected" and "Recovered" nodes. These protect data and show how data have changed. These fix several long-standing data-related problems. - A new "screenshots" plugin for creating slide shows with Leo. I used this plugin to create Leo's introductory slide shows. - Improved autocompletion: Ctrl-space starts a one-time completion. - A better installer. - Many bug fixes. Links: ------ Leo: http://webpages.charter.net/edreamleo/front.html Forum: http://groups.google.com/group/leo-editor Download: http://sourceforge.net/project/showfiles.php?group_id=3458 Bzr: http://code.launchpad.net/leo-editor/ Quotes: http://webpages.charter.net/edreamleo/testimonials.html Edward K. Ream November 15, 2010

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[RELEASED] Python 2.7.1 release candidate 1
by Benjamin Peterson Nov. 13, 2010

Nov. 13, 2010

On behalf of the Python development team, I'm chuffed to announce the a release candidate of Python 2.7.1. Please test the release candidate with your packages and report any bugs you find. 2.7.1 final is scheduled in two weeks. 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, auto-numbering of fields in the str/unicode format method, 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 2.7.1 visit: http://www.python.org/download/releases/2.7.1/ The 2.7.1 changelog is at: http://svn.python.org/projects/python/tags/r271rc1/Misc/NEWS 2.7 documentation can be found at: http://docs.python.org/2.7/ This is a testing release, so we encourage developers to test it with their applications and libraries. Please report any bugs you find, so they can be fixed in the final release. The bug tracker is at: http://bugs.python.org/ Enjoy! -- Benjamin Peterson Release Manager benjamin at python.org (on behalf of the entire python-dev team and 2.7.1's contributors)

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[RELEASED] Python 3.1.3 release candidate 1
by Benjamin Peterson Nov. 13, 2010

Nov. 13, 2010

On behalf of the Python development team, I'm gladsome to announce a release candidate of the third bugfix release for the Python 3.1 series, Python 3.1.3. This bug fix release fixes numerous issues found in 3.1.2. Please try it with your packages and report any bugs you find. The final of 3.1.3 is scheduled to be released in two weeks. The Python 3.1 version series focuses on the stabilization and optimization of the features and changes that Python 3.0 introduced. For example, the new I/O system has been rewritten in C for speed. File system APIs that use unicode strings now handle paths with undecodable bytes in them. Other features include an ordered dictionary implementation, a condensed syntax for nested with statements, and support for ttk Tile in Tkinter. For a more extensive list of changes in 3.1, see http://doc.python.org/3.1/whatsnew/3.1.html or Misc/NEWS in the Python distribution. To download Python 3.1.3 visit: http://www.python.org/download/releases/3.1.3/ A list of changes in 3.1.3 can be found here: http://svn.python.org/projects/python/tags/r313rc1/Misc/NEWS The 3.1 documentation can be found at: http://docs.python.org/3.1 Bugs can always be reported to: http://bugs.python.org Enjoy! -- Benjamin Peterson Release Manager benjamin at python.org (on behalf of the entire python-dev team and 3.1.3's contributors)

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ANN: psutil 0.2.0 released
by Giampaolo Rodolà Nov. 13, 2010

Nov. 13, 2010

Hi, I'm pleased to announce the 0.2.0 release of psutil: http://code.google.com/p/psutil === About === psutil is a module providing an interface for retrieving information on running processes and system utilization (CPU, memory) in a portable way by using Python, implementing many functionalities offered by command line tools like ps, top, kill, lsof and netstat. It currently supports Linux, Windows, OS X and FreeBSD both 32-bit and 64-bit with Python versions from 2.4 to 3.2 by using a unique code base. === Major enhancements === * per-process open files * per-process TCP/UPD connections * per-process children * per-process executable name * per-process number of threads * per-process send_signal() and terminate() methods * system cached and buffer memory * support for Windows 64-bit (XP, Vista, 7) and Windows 2000 * mingw compiler support === Links === * Home page: http://code.google.com/p/psutil * Mailing list: http://groups.google.com/group/psutil/topics * Source tarball: http://psutil.googlecode.com/files/psutil-0.2.0.tar.gz * Windows Installer (Python 2.7): http://psutil.googlecode.com/files/psutil-0.2.0.win32-py2.7.exe * Api Reference: http://code.google.com/p/psutil/wiki/Documentation --- Giampaolo Rodola' http://code.google.com/p/pyftpdlib http://code.google.com/p/psutil/

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Torrent VFS for Midnight Commander
by Oleg Broytman Nov. 11, 2010

Nov. 11, 2010

Torrent Virtual FileSystem for Midnight Commander WHAT IS IT View files, directories and meta information from a torrent metafile in Midnight Commander. WHAT'S NEW in version 1.0.0 (2010-11-11) Initial release. WHERE TO GET Master site: http://phd.pp.ru/Software/mc/ Mirrors: http://phd.by.ru/Software/mc/ http://phd.webhost.ru/Software/mc/ AUTHOR Oleg Broytman <phd(a)phd.pp.ru> COPYRIGHT Copyright (C) 2010 PhiloSoft Design LICENSE GPL Oleg. -- Oleg Broytman http://phd.pp.ru/ phd(a)phd.pp.ru Programmers don't die, they just GOSUB without RETURN.

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