Mailman 3 July 2007 - Python-announce-list

ANN: 5 New ShowMeDo videos - 'IPython' Interactive Shell
by Ian Ozsvald 28 Jul '07

28 Jul '07

Summary: Jeff Rush walks you through the excellent IPython (enhanced Python shell) in 5 hands-on videos. http://showmedo.com/videos/series?name=CnluURUTV Detail: This is a usage walkthru showing the use of the enhanced interactive shell named IPython. Topics covered include: 1) tab completion, namespace management, logging, the help system and introspection 2) directory navigation, system shell commands and the running of Python programs 3) input and output history caching, viewing and editing Python source and the logging of your session. 4) debugging and profiling your code, then look at executing long-running callables in background threads during your session. 5) session input filtering using an example of physics units for value representation, and support for data visualization using matplotlib. About ShowMeDo.com: Free videos (we call them ShowMeDos) teaching you new skills. The videos are made by us and our users, for everyone. 127 of our 327 videos are for Python: http://showmedo.com/videos/python We'd love to have more contributions - would you share what you know? Start sharing your hard-won knowledge in just 30 minutes: http://showmedo.com/submissionsForm The founders, Ian Ozsvald, Kyran Dale -- http://ShowMeDo.com http://ShowMeDo.com/about (our pictures) http://blog.ShowMeDo.com http://forums.ShowMeDo.com Ian(a)ShowMeDo.com

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The Cython project
by Stefan Behnel 28 Jul '07

28 Jul '07

Hi all, I just wanted to announce the availability of the first official Cython release (0.9) by the SAGE maintainers William Stein and Robert Bradshaw (and a bit by myself). http://www.cython.org/ Cython is based on the well-known Pyrex translator by Greg Ewing, but supports more cutting edge functionality and optimizations. It was formerly known as the SageX fork of Pyrex. Some of the highlights compared to the latest Pyrex version: 1. Conditional expressions (a if blah else b) 2. List comprehensions 3. Optimized looping (for whatever in blah: is much faster in Cython) 4. Better support for module imports: import a.b.cython_module 5. 64-bit Python 2.5 support and there's a lot more in the queue ... Cython has a site up on launchpad, so if you have any questions or suggestions, found any bugs or want to contribute patches, please visit the project there: https://launchpad.net/cython/ Have fun, Stefan

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ANN: M2Crypto 0.18
by Heikki Toivonen 27 Jul '07

27 Jul '07

M2Crypto is the most complete Python wrapper for OpenSSL featuring RSA, DSA, DH, HMACs, message digests, symmetric ciphers (including AES); SSL functionality to implement clients and servers; HTTPS extensions to Python's httplib, urllib, and xmlrpclib; unforgeable HMAC'ing AuthCookies for web session management; FTP/TLS client and server; S/MIME; ZServerSSL: A HTTPS server for Zope and ZSmime: An S/MIME messenger for Zope. Download links on the homepage at http://chandlerproject.org/Projects/MeTooCrypto. Changelog: - Added EVP.pbkdf2 to derive key from password - X509_Store_Context.get1_chain added - Added X509_Name.__iter__, __getitem__, get_entries_by_nid which allow iterating over all X509_Name_Entries or getting just all commonName entries, for example - Added X509_Name_Entry.get_object, get_data, set_data - Added back PKCS7.get0_signers (was removed in 0.16) - X509_Extension.get_value accepts flag and indent parameters. - support multiple dNSName fields in subjectAltName - support multiple commonName fields for SSL peer hostname checking - Checking for erroneous returns from more OpenSSL EVP_* functions, which means that certain things that used to fail silently will now raise an EVP.EVPError; affected m2 functions are: digest_final, cipher_init, cipher_update, cipher_final and sign_update. sign_final will now raise EVP.EVPError instead of SystemError as well. - Fixed Pkey.verify_final to take a sign parameter - If a subjectAltName extension of type dNSName is present in peer certificate, use only the dNSNames when checking peer certificate hostname, as specified by RFC 2818. If no dNSNames are present, use subject commonName. - Fixed memory leaks in m2 functions ec_key_new_by_curve_name, pkey_get_modulus, ecdsa_verify, threading_init and X509.X509.verify, X509.X509_Stack (which manifested for example when calling X509.new_stack_from_der), SSL.Connection (which manifested with some connection errors or when connect was never called), twisted wrapper, SSL.Connection.makefile (in BIO.IOBuffer really) - Fixed threading regressions introduced in 0.16, by Aaron Reizes and Keith Jackson - Added SSL session caching support to HTTPSConnection, by Keith Jackson - Added the ability to save and load DER formatted X509 certificates and certificate requests, by Keith Jackson - m2xmlrpclib.py fixed to work with Python 2.5, by Miloslav Trmac - 64-bit correctness fixes, by Miloslav Trmac - Added X509_Name.as_hash, by Thomas Uram - Moved --openssl option from general setup.py option to build_ext option, meaning you need to do: python setup.py build build_ext --openssl=/path, by Philip Kershaw - Fixed build problem affecting certain systems where OpenSSL was built without EC support - M2CRYPTO_TEST_SSL_SLEEP environment variable controls how long to sleep after starting the test SSL server. Default is 0.5, but 0.1 or even 0.05 might work with modern computers. Makes tests finish significantly faster. -- Heikki Toivonen

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ANN: PyQwt-4.2.3 released
by Gerard Vermeulen 27 Jul '07

27 Jul '07

What is PyQwt ( http://pyqwt.sourceforge.net ) ? - it is a set of Python bindings for the Qwt C++ class library which extends the Qt framework with widgets for scientific and engineering applications. It provides a widget to plot 2-dimensional data and various widgets to display and control bounded or unbounded floating point values. - it requires and extends PyQt, a set of Python bindings for Qt. - it supports the use of PyQt-3, Qt-3, Qwt-4.2, the Numerical Python extensions (any combination of NumPy, numarray, and Numeric) and optionally SciPy in a GUI Python application or in an interactive Python session. - it runs on POSIX, Mac OS X and Windows platforms (practically any platform supported by Qt and Python). - PyQwt-4.2.3 can coexist with PyQwt-5.0.x (for Qt-3 and Qt-4) This is a maintenance release with backports of the newest features in PyQwt-5.0.1 to PyQwt-4.2.3. PyQwt-4.2.3 should not be used for new code. New features and bug fixes in PyQwt-4.2.3 are: - support for SIP-4.7, and PyQt-3.17.3. - support for the N-D array interface specification ( http://numpy.scipy.org/array_interface.shtml ) allows to copy data out of NumPy arrays without enabling support for NumPy during the compilation of PyQwt. - the iqt module also supports an interactive Python session without the help of the GNU readline module. - removal of a huge memory leak in the conversion from an array to a QImage. PyQwt-4.2.3 supports: 1. Python-2.5.x, or -2.4.x. 2. PyQt-3.17.x. 3 SIP-4.7.x, or -4.6.x. 4. Qt-3.3.x, or -3.2.x. Enjoy -- Gerard Vermeulen

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ANN: mod_wsgi 1.0c1 now available
by Graham Dumpleton 27 Jul '07

27 Jul '07

The initial release candidate for version 1.0 of mod_wsgi is now available for final testing. The software and documentation are both available from: http://www.modwsgi.org The mod_wsgi package consists of an Apache web server module designed and implemented specifically for hosting Python based web applications that support the WSGI interface specification. Examples of major Python web frameworks and applications which are known to work in conjunction with mod_wsgi include CherryPy, Django, MoinMoin, Pylons, Trac and TurboGears. Hosted WSGI applications may be run in 'embedded' mode, in the style of mod_python, or 'daemon' mode, in a style somewhat similar to that of mod_fastcgi. Embedded mode would generally be used where dedicated servers are available. The mode would allow the scalability and process management features of Apache to be fully utilised to achieve maximum performance for your application. Daemon mode would instead be used where applications need to be separated from each other. This mode would thus be suitable for shared hosting environments where applications need to be run in distinct processes running as the user which owns the application and not the user which Apache runs as. The Apache module can be compiled for and used with either Apache 1.3, 2.0 or 2.2, although daemon mode is only available on Apache 2.X running on UNIX. When running on UNIX systems, either the single threaded 'prefork' or multithreaded 'worker' Apache MPMs can be safely used. If you have any questions about mod_wsgi or wish to provide feedback, use the Google group for mod_wsgi found at: http://groups.google.com/group/modwsgi Enjoy Graham Dumpleton

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ANN: cssutils 0.9.2b1
by Chris 27 Jul '07

27 Jul '07

what is it ---------- A Python package to parse and build CSS Cascading Style Sheets. Partly implements the DOM Level 2 Style Stylesheets and CSS interfaces. An implementation of the WD CSS Module: Namespaces which has no official DOM yet is included from v0.9.1. changes since 0.9.1 ------------------- - partly implemented css.CSS2Properties - lots of small changes and bugfixes, for a complete list see the relevant README file http://cssutils.googlecode.com/svn/tags/TAG_0.9.2b1/README.txt license ------- cssutils is published under the LGPL. download -------- For download options see http://cthedot.de/cssutils/, the code is on Google Code now (incl SVN access). cssutils needs Python 2.4 (tested with Python 2.5 on Windows XP only) Bug reports, comments, etc are very much appreciated! (Please use the issue tracker or wiki on Google Code for this as because of the amount of spam I receive emails might get lost) thanks christof

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ANN: New ShowMeDo video - Learn Django: Create a Wiki in 20 minutes
by Ian Ozsvald 26 Jul '07

26 Jul '07

Summary: In 20 minutes learn how to write a working Wiki with Django from a fresh install. Video by Siddhi. http://showmedo.com/videos/video?name=1100000&fromSeriesID=110 Detail: "In this tutorial, I introduce the basics of Django by walking you through the development of a simple wiki application. We'll see how you can design your URLs, interact with the database and use the Django template library. As an added bonus, we'll also include support for editing pages using Markdown syntax. By the end, you'll see how little time and code it takes to get a simple application up and running." About ShowMeDo.com: Free videos (we call them ShowMeDos) teaching you new skills. The videos are made by us and our users, for everyone. 127 of our 327 videos are for Python: http://showmedo.com/videos/python We'd love to have more contributions - would you share what you know? Start sharing your hard-won knowledge in just 30 minutes: http://showmedo.com/submissionsForm The founders, Ian Ozsvald, Kyran Dale -- http://ShowMeDo.com http://ShowMeDo.com/about (our pictures) http://blog.ShowMeDo.com http://forums.ShowMeDo.com Ian(a)ShowMeDo.com

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ANN: eGenix EuroPython 2007 Presentations & Videos
by eGenix Team: M.-A. Lemburg 26 Jul '07

26 Jul '07

________________________________________________________________________ eGenix EuroPython 2007 Presentations & Videos ________________________________________________________________________ eGenix is pleased to announce the immediate availability of PDF and Flash video versions of the presentations we gave at this years EuroPython 2007 conference in Vilnius. This announcement is also available on our web-site for online reading: http://www.egenix.com/company/news/EuroPython-2007-Presentations.html ________________________________________________________________________ INTRODUCTION The EuroPython Conference is the one of the premier conferences for Python & Zope users and developers. This year it was being held from the 9th to 11th July in Vilnius, Lithuania. eGenix was one of the founding members of the EuroPython conference team and played a major role in organizing the first EuroPython conference in the year 2002. Since then we have attended every EuroPython conference to meet up face-to-face with the people from the Python & Zope communities and have given regular talks at these conferences. ________________________________________________________________________ TALKS AT EUROPYTHON 2007 We gave the following two talks at the conference. The presentations are available for viewing and download from our Presentations and Talks section: http://www.egenix.com/library/presentations/ As special feature, we have added talk videos in addition to providing the slide PDFs. You can view the talks online if you have the Adobe Flash Player 8 or later installed. * Parsing Languages with mxTextTools mxTextTools comes with a high performance Tagging Engine for text and Unicode data which can be used to tokenize and parse languages. The resulting abstract syntax tree can then be hooked up to a generator to build a complete and fast compiler in pure Python. The talk gives a short introduction to the way the mxTextTools Tagging Engine works and how it can be used to build compilers. mxTextTools is an eGenix Open Source product available as part of the eGenix mx Base Distribution. * An introduction to working with relational databases from Zope Although Zope has been around for quite a while, it continues to find new users particularly amongst non-programmers who are looking for a way to work with existing data which is usually in some relational database (PostgreSQL, MySQL, MS SQL, Oracle, DB2, etc.). One of the reasons for this is that Zope provides an extremely powerful, yet secure, through-the-web programming environment. The presentation is directed towards new users and will provide a brief introduction by example into the Zope way of doing things. At the same time it highlights how working within Zope is automatic training in good programming methodology: data management is delegated to ZSQL methods, PythonScripts act as controllers and Zope Page Templates provide the views. Together they encourage modularity and reusability. The sample application and database are available for download. Enjoy, -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Source (#1, Jul 26 2007) >>> Python/Zope Consulting and Support ... http://www.egenix.com/ >>> mxODBC.Zope.Database.Adapter ... http://zope.egenix.com/ >>> mxODBC, mxDateTime, mxTextTools ... http://python.egenix.com/ ________________________________________________________________________ :::: Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! :::: eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48 D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg Registered at Amtsgericht Duesseldorf: HRB 46611

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SQLObject 0.9.1
by Oleg Broytmann 26 Jul '07

26 Jul '07

Hello! I'm pleased to announce the 0.9.1 release of SQLObject. What is SQLObject ================= SQLObject is an object-relational mapper. Your database tables are described as classes, and rows are instances of those classes. SQLObject is meant to be easy to use and quick to get started with. SQLObject supports a number of backends: MySQL, PostgreSQL, SQLite, and Firebird. It also has newly added support for Sybase, MSSQL and MaxDB (also known as SAPDB). Where is SQLObject ================== Site: http://sqlobject.org Development: http://sqlobject.org/devel/ Mailing list: https://lists.sourceforge.net/mailman/listinfo/sqlobject-discuss Archives: http://news.gmane.org/gmane.comp.python.sqlobject Download: http://cheeseshop.python.org/pypi/SQLObject/0.9.1 News and changes: http://sqlobject.org/News.html What's New ========== News since 0.9.0 ---------------- Bug Fixes ~~~~~~~~~ * Replaced calls to style.dbColumnToPythonAttr() in joins.py by name/dbName lookup in case the user named columns differently using dbName. * Minor correction in the tests: we fully support EnumCol in Postgres. * MySQLConnection now recognizes Enum, Double and Time columns when drawing the database scheme from DB. * Fixed misspelled methods in col.py. * Minor fix in FirebirdConnection.fromDatabase. * Fixed a bug with default field values for columns for firebird connection. * Prevent a deadlock in declarative.threadSafeMethod() by not reacquiring the class lock. * Run post_funcs after sending RowCreatedSignal. * Suppress the second RowUpdateSignal in .set() called from ._SO_setValue(). * Fixed a bug in col.createSQL(). * Fixed a bug in converting date/time for years < 1000 (time.strptime() requires exactly 4 digits for %Y, hence a year < 1000 must be 0-padded). Other Changes ~~~~~~~~~~~~~ * Changed string quoting style for PostgreSQL and MySQL from \' to ''. For a more complete list, please see the news: http://sqlobject.org/News.html Oleg. -- Oleg Broytmann http://phd.pp.ru/ phd(a)phd.pp.ru Programmers don't die, they just GOSUB without RETURN.

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SQLObject 0.8.5
by Oleg Broytmann 26 Jul '07

26 Jul '07

Hello! I'm pleased to announce the 0.8.5 release of SQLObject. What is SQLObject ================= SQLObject is an object-relational mapper. Your database tables are described as classes, and rows are instances of those classes. SQLObject is meant to be easy to use and quick to get started with. SQLObject supports a number of backends: MySQL, PostgreSQL, SQLite, and Firebird. It also has newly added support for Sybase, MSSQL and MaxDB (also known as SAPDB). Where is SQLObject ================== Site: http://sqlobject.org Development: http://sqlobject.org/devel/ Mailing list: https://lists.sourceforge.net/mailman/listinfo/sqlobject-discuss Archives: http://news.gmane.org/gmane.comp.python.sqlobject Download: http://cheeseshop.python.org/pypi/SQLObject/0.8.5 News and changes: http://sqlobject.org/News.html What's New ========== News since 0.8.4 ---------------- Bug Fixes ~~~~~~~~~ * Replaced calls to style.dbColumnToPythonAttr() in joins.py by name/dbName lookup in case the user named columns differently using dbName. * Minor correction in the tests: we fully support EnumCol in Postgres. * MySQLConnection now recognizes Enum, Double and Time columns when drawing the database scheme from DB. * Minor fix in FirebirdConnection.fromDatabase. * Fixed a bug with default field values for columns for firebird connection. * Prevent a deadlock in declarative.threadSafeMethod() by not reacquiring the class lock. * Run post_funcs after sending RowCreatedSignal. * Suppress the second RowUpdateSignal in .set() called from ._SO_setValue(). * Fixed a bug in col.createSQL(). * Fixed a bug in converting date/time for years < 1000 (time.strptime() requires exactly 4 digits for %Y, hence a year < 1000 must be 0-padded). Other Changes ~~~~~~~~~~~~~ * Changed string quoting style for PostgreSQL and MySQL from \' to ''. For a more complete list, please see the news: http://sqlobject.org/News.html Oleg. -- Oleg Broytmann http://phd.pp.ru/ phd(a)phd.pp.ru Programmers don't die, they just GOSUB without RETURN.

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