Python-announce-list September 2002

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56 participants
69 discussions

PdfSearch-0.2
by carlo_bif＠yahoo.com 24 Sep '02

24 Sep '02

PdfSearch release 0.2 is out. ----------------------------- This version, thanks to CherryPy (http://www.cherrypy.org), offers an Html interface and Server capabilities. What is PdfSearch? ------------------ PdfSearch is a search engine for archives of PDF files with command-line, GUI and Html interface. Where is PdfSearch? ------------------- The release is on SourceForge: http://sourceforge.net/project/showfiles.php?group_id=53169&release_id=1115… Home Page: http://pdfsearch.sourceforge.net Regards, Carlo Bifulco

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VanPyZ next meeting: Oct 1st
by Andy McKay 24 Sep '02

24 Sep '02

The Vancouver Python and Zope user group is proud to announce its next meeting: * "Plone: Zope's killer app" by Andy McKay A review of Plone 1.0 which is a: "free open source, point-clicky through-the-web, customizable content management system built in Zope with loads of features that can be up and running in five minutes". I'll give a quick demo of Plone, and an overview of the features including changes since some of the earlier releases. This will followed by pointy-clicky beers at the through-the-door drinking establishment. Date: Tuesday, Oct. 1st Time: 7pm Location: ActiveState, 580 Granville, Vancouver, BC (http://www.activestate.com/Contact/) VanPyZ is the Vancouver Python and Zope user group. We meet monthly to discuss Python and Zope. Anyone is welcome to come. Website: http://vanpyz.agmweb.ca Mailing List: http://lists.zpug.org/mailman/listinfo/vanpyz -- Andy McKay www.agmweb.ca -- Andy McKay www.agmweb.ca

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ANN: eGenix.com mx BASE Extension Package 2.0.4
by M.-A. Lemburg 23 Sep '02

23 Sep '02

________________________________________________________________________ ANNOUNCING: eGenix.com mx BASE Extension Package for Python Version 2.0.4 Open Source Python extensions providing important and useful services for Python programmers. ________________________________________________________________________ WHAT IS IT ?: The eGenix.com mx BASE Extensions for Python are a collection of professional quality software tools which enhance Python's usability in many important areas such as fast text searching, date/time processing and high speed datatypes. Python is an object-oriented Open Source programming language which runs on all modern platforms (http://www.python.org/). By integrating ease-of-use, clarity in coding, enterprise application connectivity and rapid application design, Python establishes an ideal programming platform for todays IT challenges. The tools have a proven record of being portable across many Unix and Windows platforms. You can write applications which use the tools on Windows and then run them on Unix platforms without change due to the consistent platform independent interfaces. All available packages have proven their stability and usefulness in many mission critical applications and various commercial settings all around the world. ________________________________________________________________________ WHAT'S NEW ? The RPM packages were updated to install to /usr/ instead of /usr/local/ to comply with the Linux Standard Base (LSB) and to be compatible with the Python RPMs which are available from python.org. As always we are providing precompiled versions of the package for Windows and Linux as well as sources which allow you to install the package on all other supported platforms. ________________________________________________________________________ EGENIX.COM MX BASE PACKAGE OVERVIEW: mxDateTime - Generic Date/Time Types mxDateTime is an extension package that provides three new object types, DateTime, DateTimeDelta and RelativeDateTime, which let you store and handle date/time values in a much more natural way than by using ticks (seconds since 1.1.70 0:00 UTC; the encoding used by the time module). You can add, subtract and even multiply instances, pickle and copy them and convert the results to strings, COM dates, ticks and some other more esoteric values. In addition, there are several convenient constructors and formatters at hand to greatly simplify dealing with dates and times in real-world applications. In addition to providing an easy-to-use Python interface the package also exports a comfortable C API interface for other extensions to build upon. This is especially interesting for database applications which often have to deal with date/time values (the mxODBC package is one example of an extension using this interface). mxTextTools - Fast Text Processing Tools mxTextTools is an extension package for Python that provides several useful functions and types that implement high-performance text manipulation and searching algorithms in addition to a very flexible and extendable state machine, the Tagging Engine, that allows scanning and processing text based on low-level byte-code "programs" written using Python tuples. It gives you access to the speed of C without the need to do any compile and link steps every time you change the parsing description. Applications include parsing structured text, finding and extracting text (either exact or using translation tables) and recombining strings to form new text. mxStack - Fast and Memory-Efficient Stack Type mxStack is an extension package that provides a new object type called Stack. It works much like what you would expect from such a type, having .push() and .pop() methods and focusses on obtaining maximum speed at low memory costs. mxTools - Collection of Additional Builtins mxTools is an extension package that includes a collection of handy functions and objects giving additional functionality in form of new builtins to the Python programmer. The package auto-installs the new functions and objects as builtins upon first import. This means that they become instantely available to all other modules without any further action on your part. Add the line import NewBuiltins to your site.py script and they will be available to all users at your site as if they were installed in the Python interpreter itself. mxProxy - Generic Proxy Wrapper Type mxProxy is an extension package that provides a new type that is suitable to implement Bastion like features without the need to use restricted execution environments. The type's main features are secure data encapsulation (the hidden objects are not accessible from Python since they are stored in internal C structures), customizable attribute lookup methods and a cleanup protocol that helps in breaking circular references prior to object deletion. The latest version adds a very interesting new feature: weak references which help you work with circular references in a way that doesn't cause memory leakage in a Python system. Note that even though Python 2.1+ has its own weak reference implemetation, this package can be used to write applications which also work on Python 1.5.2 and 2.0. mxBeeBase - On-disk B+Tree Based Database Kit mxBeeBase is a high performance construction kit for disk based indexed databases. It offers components which you can plug together to easily build your own custom mid-sized databases (the current size limit is sizeof(long) which gives you an address range of around 2GB on 32-bit platforms). The two basic building blocks in mxBeeBase are storage and index. Storage is implemented as variable record length data storage with integrated data protection features, automatic data recovery and locking for multi process access. Indexes use a high performance optimized B+Tree implementation built on top of Thomas Niemann's Cookbook B+Tree implementation (http://epaperpress.com/). ________________________________________________________________________ WHERE CAN I GET IT ? The download archives and instructions for installing the packages can be found at: http://www.egenix.com/ ________________________________________________________________________ WHAT DOES IT COST ? The BASE package comes with a Python 2.0 style license, which means that you can use it in both commercial and non-commercial settings without fee or charge. The package comes with full source code. ________________________________________________________________________ WHERE CAN I GET SUPPORT ? Commercial quality support for these packages is available from eGenix.com Software GmbH. Please see http://www.egenix.com/files/python/eGenix-mx-Extensions.html#Support for details about the eGenix support offerings. ________________________________________________________________________ Enjoy, -- Marc-Andre Lemburg CEO eGenix.com Software GmbH ______________________________________________________________________ Company & Consulting: http://www.egenix.com/ Python Software: http://www.egenix.com/files/python/

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[ANN] wrapper around 'find' 'cpio'
by Per Jensen 22 Sep '02

22 Sep '02

This is to announce a very simple yet useful wrapper around the GNU tools 'find', 'cpio', 'gzip' and 'zcat'. The script makes is easy to do a verified backup of a hierarchy of directories using sane tool options (I hope !). Restoring a few files from the archive selected by a pattern is simple and straightforward. Filenames with non ASCII characters are restored correctly. If they are shown correctly, depends on the setting of LC_ALL. A recipe for success is included in the script. The homepage is here: http://www.net-es.dk/~pj/python/backup-admin/ Give it a spin and tell me if it works for you. /Per

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ClientForm -- HTML form handling
by John J. Lee 22 Sep '02

22 Sep '02

http://wwwsearch.sourceforge.net/ClientForm ClientForm 0.0.2a WARNING: this is an alpha release. The API may change, and don't expect everything to work properly! ClientForm is a Python module for handling HTML forms on the client side, useful for parsing HTML forms, filling them in and returning the completed forms to the server. It is a port (more-or-less) of Gisle Aas' Perl module HTML::Form, from the libwww-perl library. import ClientForm import urllib2 request = urllib2.Request("http://www.acme.com/form.html") response = urllib2.urlopen(request) forms = ClientForm.ParseResponse(response) form = forms[0] form["author"] = "Gisle Aas" request2 = form.click("Thanks") response2 = urllib2.urlopen(request2) print result2.geturl() print result2.info() # headers for line in result2.readlines(): # body print line All of the standard input types are supported: TEXT, PASSWORD, FILE, HIDDEN, BUTTON, RESET, IMAGE, SUBMIT, CHECKBOX, SELECT/OPTION and RADIO. TEXTAREA and FILE (for file upload) are not yet supported, but will be in a future version. Python 2.0 or above is required. I will backport to 1.5.2 later. To run the tests, you need the unittest module (from PyUnit). John

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New Python/XML column on xml.com
by Uche Ogbuji 21 Sep '02

21 Sep '02

The first installment of my new "Python&XML" column has appeared on xml.com. The State of the Python-XML Art: http://www.xml.com/pub/a/2002/09/18/py.html In this article, a survey of the many tools available for XML processing in Python. -- Uche Ogbuji Fourthought, Inc. http://uche.ogbuji.net http://4Suite.org http://fourthought.com Apache 2.0 API - http://www-106.ibm.com/developerworks/linux/library/l-apache/ Python&XML column: Tour of Python/XML - http://www.xml.com/pub/a/2002/09/18/py.html Python/Web Services column: xmlrpclib - http://www-106.ibm.com/developerworks/webservices/library/ws-pyth10.html

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CFP: Lightweight Languages 2002 (LL2)
by Jeremy Hylton 20 Sep '02

20 Sep '02

Lightweight Languages Worshop 2002 (LL2) ---------------------------------- Saturday, November 9, 2002, MIT, Cambridge, MA http://ll2.ai.mit.edu mailto:ll2@ai.mit.edu CALL FOR PRESENTATIONS LL2 will be an intense, exciting, one-day forum bringing together the best programming language implementors and researchers, from both academia and industry, to exchange ideas and information, to challenge one another, and to learn from one another. The focus of the workshop is not whether or not a particular language is "lightweight", but how to get usable and useful programming tools into the hands of programmers, minimizing dogma, and maximizing flexibility. Proposal Abstracts - due Tuesday Oct. 8: ------------------ We are seeking two to five page abstracts of talks to be given at the workshop. There will be two talk lengths: (1) Rapid Fire: 10 minutes strict time limit. (2) Regular: 30 minutes. Some suggested topics are: * Success or failure stories: History and analysis of: - language design: features that either worked out great or were a curse, - language implementation: clever implementation ideas that either worked or failed miserably, - application war stories involving lightweight languages. * "From scripts to programs" - software engineering with lightweight and/or a mix of languages. How to (or not to!) scale from little scripts to large, complex applications. * From ivory tower to cube - what language implementors need to know from academic programming languages research. * and back. Indicate whether you intend the talk to be a 10 minute or a 30 minute talk. Send submissions to: ll2-submit(a)ai.mit.edu We want presentations that will inspire, motivate, and educate. We want language implementors and researchers to leave the workshop fired up with ideas for future languages, features, and implementation tricks. We want language users to leave the workshop fired up with new ideas and new tools. In addition to submitted presentations, there will be a number of invited talks, and a panel or debate. After the workshop, there will be an evening social event and dinner. Last year's workshop is online at http://ll1.mit.edu. Dates: Tuesday, Oct. 8 - submissions due by end of day. Tuesday, Oct. 15 - notification of acceptance Saturday, Nov. 9, 9am-7pm - LL2! Program Committee: Paul Graham <pg(a)bugbear.com> Jeremy Hylton <jeremy(a)zope.com> Shriram Krishnamurthi <sk(a)cs.brown.edu> Mike Salib <msalib(a)mit.edu> Olin Shivers <shivers(a)cc.gatech.edu> Dan Sugalski <dan(a)sidhe.org> Greg Sullivan <gregs(a)ai.mit.edu> (chair) Dan Weinreb <DLWeinreb(a)attbi.com>

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[ANN] PyReverse 0.4
by Sylvain Thénault 20 Sep '02

20 Sep '02

What's new ? ------------ * add pyvcg command line tool * add support for *.pyreverserc * documentation reorganization and improvement * fix a bug in pyargo What's PyReverse ? ------------------ Pyreverse is a set of utilities to reverse enginering Python code. So far, it features dependency analysis tools, unittest generation, and XMI generation for importation in a UML modeling tool. A special module can be used to generate files readable by Argo UML. It uses a representation of a Python project in a class hierarchy which can be used to extract any information (such as generating UML diagrams and make a few statistics from the Python code, as "pyargo" and "pystats") Home page --------- http://www.logilab.org/pyreverse/ Download -------- ftp://ftp.logilab.org/pub/pyreverse/ Mailing list ------------ mailto://xml-logilab@logilab.org -- Sylvain Thénault LOGILAB http://www.logilab.org

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ANN: RuneBlade-Foundation-0.3.2
by Shane Holloway (RuneBlade) 20 Sep '02

20 Sep '02

#~ ANN: RuneBlade-Foundation-0.3.2 ~~~~~~~~~~~~~~~~~~~ RuneBlade Foundation is a set of GUI skinning and other tools created to ease the development of XML-based applications. Application such as Jabber (XML) for communications; XML "skin" for a wxPython GUI; or, an XML "skin" for xhtml or svg output similar to other templating engines. More information, including distributables, can be found at http://www.runeblade.com/foundation/ or by contacting the author at shane.holloway(a)runeblade.com RuneBlade Foundation Release 0.3.2 includes: Updated Skinning code to work with wxPython 2.3.3.1 and 2.3.2.1 Addition of an Aspect Oriented support package Alpha-level addition of an Aspect Oriented Subject Observer package And many optimizations and bugfixes See http://www.runeblade.com/foundation/revision.html for more information. RuneBlade Foundation is governed by a BSD style open-source LICENSE, and can be found at http://www.runeblade.com/foundation/bsd.html Future announcements will also be made via mailing list, which can be found at http://www.runeblade.com/mailman/listinfo/foundation-announce #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ <a href="http://www.runeblade.com/foundation">RuneBlade-Foundation-0.3.2</a> - RuneBlade Foundation is a set of GUI skinning and other tools created to ease the development of XML-based applications. (20-Sep-02)

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ANNOUNCE: wxPython 2.3.3.1
by Robin Dunn 20 Sep '02

20 Sep '02

wxPython 2.3.3.1 has just been released! You can get binaries for Win32, Mac OS X or Linux, as well as sources, documentaion, etc. from http://wxPython.org/ or directly from SourceForge at http://sf.net/project/showfiles.php?group_id=10718&release_id=111669 wxPython is an extension module for Python that provides access to many of the wxWindows GUI C++ classes from applications written in the Python programming language. It uses native controls wherever possible providing native Look and Feel as well as the speed you would expect from natvie compiled applications. Major changes from the previous release are listed below. -- Robin Dunn Software Craftsman http://wxPython.org Java give you jitters? Relax with wxPython! Changes in 2.3.3.1 ------------------ Added wxSplashScreen. Added wxGenericDirCtrl. Added wxMultiChoiceDialog. The calltip window and autocomplete window in wxSTC will now use a wxPopupWindow if available on the platform (and functioning correctly) so they can extend beyond the client area of the STC if needed. Finished wrapping and providing typemaps for wxInputStream and also added the stream ctor and other methods for wxImage so images can now be loaded from any Python "file-like" object. Changed the img2py tool to use PNG instead of XPM for embedding image data in Python source code, and the generated code now uses streams to convert the image data to wxImage, wxBitmap, or wxIcon. Added the wxPython.lib.rcsizer module which contains RowColSizer. This sizer is based on code from Niki Spahiev and lets you specify a row and column for each item, as well as optional column or row spanning. Cells with no item assigned to it are just left blank. Stretchable rows or columns are specified and work the same as in wxFlexGridSizer. Updated XRCed from Roman Rolinsky Added wxBufferedDC. Upgraded wxSTC from Scintilla 1.40 to Scintilla 1.45, and then again to version 1.47, and one more time to 1.48! <wink> UNICODE! wxWindows/wxPython can be compiled with unicode support enabled or disabled. Previous to wxPython 2.3.3 non-unicode mode was always used. Starting with 2.3.3 either mode is supported, but only if it is also available in wxWindows on the platform. Currently wxWindows only supports unicode on MS Windows platforms, but with the recent release of GTK+ 2.0 it is only a matter of time until it can be done on wxGTK (Linux and other unixes) as well. Unicode works best on platforms in the NT branch of the Windows family tree (NT, win2k, XP) but it is now also possible to use the same unicode binaries on win95/98/ME platforms as well! This is done by using a special library and DLL with the application called MSLU, (Microsoft Layer for Unicode). It simply gets out of the way if the app is run on an NT box, otherwise if run on a win9x box it loads a special DLL that provides the unicode versions of the windows API. So far I have not been able to get this to work perfectly on win9x. Most things work fine but wxTaskBarIcon for example will cause a crash if used with the unicode build on win95. So how do you use it? It's very simple. When unicode is enabled, then all functions and methods in wxPython that return a wxString from the C++ function will return a Python unicode object, and parameters to C++ functions/methods that expect a wxString can accept either a Python string or unicode object. If a string object is passed then it will be decoded into unicode using the converter pointed to by wxConvCurrent, which will use the default system encoding. If you need to use a string in some other encoding then you should convert it to unicode using the Python codecs first and then pass the unicode string to the wxPython method. Added wxListCtrlAutoWidthMixin from Erik Westra. Added wxIconBundle and wxTopLevelWindow.SetIcons. Added wxLocale and wxEncodingConverter. A little black magic... When the C++ object (for a window or whatever) is deleted there is no way to force the Python shadow object to also be destroyed and clean up all references to it. This leads to crashes if the shadow object tries to call a method with the old C++ pointer. The black magic I've done is to replace the __class__ in the Python instance object with a class that raises an exception whenever a method call (or other attribute access) is attempted. This works for any class that is OOR aware. Added OOR support for wxGridCellRenderer, wxGridCellEditor, wxGridCellAttr, wxGridCellAttrProvider, wxGridTableBase and their derived classes. Added wxImage.GetDataBuffer which returns an in-place edit buffer of the image data. (Patch #546009) Added a sample that shows how to embed wxPython in a wxWindows C++ application. Added wxPyWindow, wxPyPanel and wxPyControl which are just like their wx counterparts except they allow some of the more common C++ virtual methods to be overridden in Python derived classes. The methods supported are: DoMoveWindow DoSetSize DoSetClientSize DoSetVirtualSize DoGetSize DoGetClientSize DoGetPosition DoGetVirtualSize DoGetBestSize InitDialog TransferDataFromWindow TransferDataToWindow Validate AcceptsFocus AcceptsFocusFromKeyboard GetMaxSize AddChild RemoveChild If there are other methods that you think should be supported please let me know. Changed wxGenButton to derive from wxPyControl and overload DoGetBestSize and AcceptsFocus. Added wxArtProvider. Added wxCallAfter which is a helper function that registers a function (or any callable Python object) to be called once the next time there are no pending events. This is useful for when you need to do something but it can't be done during the current event handler. The implementation is very simple, see wxPython/wx.py. Fixed a boatload of reference leaks. Added a demo of using a sizer in a wxScrolledWindow, in effect creating a ScrolledPanel. Added a sample to the demo that shows how to use radio menu items, and other menu stuff. Added wxIEHtmlWin. This is essentially the same as using IE with the ActiveXWrapper already in the library, but it is implemented all in C++ and therefore does not need any of the modules from win32all and so it is less fragile in the face of changes. Fixed the ActiveXWrapper problem. Looks like when the win32com modules make a "callback" that they (incorrectly, IMHO) allocate a transient thread state structure. Since wxPython is now saving tstates for it's own callbacks it ended up using garbage after win32com got rid of the temporary tstate... Added a generic static text control to wxPython.lib.stattext. This is so things like Boa and PythonCard can have a static text that can respond to mouse events and etc. Changed the wxDateTime.Parse* methods to return an int that will be -1 on failure, and the index where parsing stopped otherwise. Moved tools to be a Python package in wxPython.tools, added scripts to import and launch each tool. This will let you import and use the tools in your own scripts or apps as needed. On Linux and OS X the tool scripts are installed to {prefix}/bin so you should be able to easily launch them from the command line. For example, PyCrust can be started with just the "pycrust" command. Added a sample to the demo that catches various key events and displays the details of the event. Added wxWizard, wxWizardPage, wxWizardPageSimple and wxPyWizardPage. Added wxXmlResourceHandler which allows you to create custom handlers for nonstandard class types in XRC resources. See the demo for an example. Added wxPython.lib.mixins.rubberband module from Robb Shecter. Added wxTimeCtrl from Will Sadkin.

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Python-announce-list September 2002