- Zope-Dev - Zope lists

Oracle and floats?
by Mike Salib 02 May '00

02 May '00

Hi, We're running Zope 2.1.6 and we've been having trouble using ZOracleDA with Zope. Specificaly, whenever we try to retrieve floating point information from the database, it comes back as integer data. In other words, ZOracleDA (actually, DCOracle - we've verified that just by checking using DCOracle from the comand line) translates all floating point values into ints, throwing away the fractional part. Has anyone seen this before? A quick way to test this is to run the following query against oracle: select count(*)/10.0 from tab This should return something like 9.5 or 7.5. If you get an integer, then you know something is wrong. Thanks a lot everyone, Mike Salib

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Zope & Z39.50
by Eron Lloyd 02 May '00

02 May '00

Is there anyone that has been successful at using Zope and Python to access resources of another database (Like a Library Automation System) using the Z39.50 protocol? I haven't been able to find much of anything on this; I know Z39.50 is not widely used for general Web communication. I also wonder how hard it would be (if a solution doesn't exist) to implement this in Zope, possibly by building a Z39.50 protocol toolkit in Python and then plugging it into Zope. Eron

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Software Carpentry Design Competition Finalists
by gvwilson＠nevex.com 02 May '00

02 May '00

Software Carpentry Design Competition First-Round Results http://www.software-carpentry.com May 2, 2000 The Software Carpentry Project is pleased to announce the selection of finalists in its first Open Source Design Competition. There were many strong entries, and we would like to thank everyone who took the time to participate. We would also like to invite everyone who has been involved to contact the teams listed below, and see if there is any way to collaborate in the second round. Many of you had excellent ideas that deserve to be in the final tools, and the more involved you are in discussions over the next two months, the easier it will be for you to take part in the ensuing implementation effort. The 12 entries that are going forward in the "Configuration", "Build", and "Track" categories are listed below (in alphabetical order). The four prize-winning entries in the "Test" category are also listed, but as is explained there, we are putting this section of the competition on hold for a couple of months while we try to refine the requirements. You can inspect these entries on-line at: http://www.software-carpentry.com/first-round.html And so, without further ado... == Configuration The final four entries in the "Configuration" category are: * BuildConf Vassilis Virvilis * ConfBase Stefan Knappmann * SapCat Lindsay Todd * Tan David Ascher == Build The finalists in the "Build" category are: * Black David Ascher and Trent Mick * PyMake Rich Miller * ScCons Steven Knight * Tromey Tom Tromey Honorable mentions in this category go to: * Forge Bill Bitner, Justin Patterson, and Gilbert Ramirez * Quilt David Lamb == Track The four entries to go forward in the "Track" category are: * Egad John Martin * K2 David Belfer-Shevett * Roundup Ka-Ping Yee * Tracker Ken Manheimer There is also an honorable mention for: * TotalTrack Alex Samuel, Mark Mitchell == Test This category was the most difficult one for the judges. First-round prizes are being awarded to * AppTest Linda Timberlake * TestTalk Chang Liu * Thomas Patrick Campbell-Preston * TotalQuality Alex Samuel, Mark Mitchell However, the judges did not feel that any of these tools would have an impact on Open Source software development in general, or scientific and numerical programming in particular. This is due in large part to the vagueness of the posted requirements, for which the project coordinator (Greg Wilson) accepts full responsibility. We will therefore not be going forward with this category at the present time. Instead, the judges and others will develop narrower, more specific requirements, guidelines, and expectations. The category will be re-opened in July 2000. == Contact The aim of the Software Carpentry project is to create a new generation of easy-to-use software engineering tools, and to document both those tools and the working practices they are meant to support. The Advanced Computing Laboratory at Los Alamos National Laboratory is providing $860,000 of funding for Software Carpentry, which is being administered by Code Sourcery, LLC. For more information, contact the project coordinator, Dr. Gregory V. Wilson, at 'gvwilson(a)software-carpentry.com', or on +1 (416) 504 2325 ext. 229. == Footnote: Entries from CodeSourcery, LLC Two entries (TotalTrack and TotalQuality) were received from employees of CodeSourcery, LLC, the company which is hosting the Software Carpentry web site. We discussed this matter with Dr. Rod Oldehoeft, Deputy Directory of the Advanced Computing Laboratory at Los Alamos National Laboratory. His response was: John Reynders [Director of the ACL] and I have discussed this matter. We agree that since the judges who make decisions are not affiliated with Code Sourcery, there is no conflict of interest. Code Sourcery gains no advantage by hosting the Software Carpentry web pages. Please continue evaluating all the entries on their merits, and choose the best for further eligibility. Note that the project coordinator, Greg Wilson, is neither employed by CodeSourcery, nor a judge in the competition.

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More Zope 2 CVS errors
by Michael Bernstein 02 May '00

02 May '00

The following files should be stored in CVS as binary files: Zope2/lib/python/HelpSys/www/helpTopic.gif Zope2/lib/python/HelpSys/www/productHelp.gif Zope2/lib/python/OFS/www/ControlPanel_icon.gif Zope2/lib/python/OFS/www/properties.jpg Zope2/lib/python/OFS/www/Help_icon.gif Zope2/lib/python/OFS/www/Properties_icon.gif Zope2/lib/python/OFS/www/UpFolder_icon.gif Zope2/lib/python/Products/ExternalMethod/www/function.gif Zope2/lib/python/Products/MailHost/www/MailHost_icon.gif Zope2/lib/python/Products/PythonMethod/www/pymethod.gif Zope2/lib/python/Products/PythonMethod/www/xpymethod.gif All files in the Zope2/lib/python/Products/ZGadflyDA directory should NOT be binary files. HTH, Michael Bernstein Information Architect

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Zope 2 CVS errors
by Michael Bernstein 02 May '00

02 May '00

The following files need to be reset as binary files in CVS: Zope2/lib/python/App/www/zope_button.jpg Zope2/lib/python/App/www/z_button.jpg Zope2/lib/python/App/www/properties.jpg Zope2/lib/python/App/www/logo.jpg Zope2/lib/python/App/www/help.jpg Zope2/lib/python/App/www/CacheManager_icon.gif Zope2/lib/python/App/www/border.gif Zope2/lib/python/App/www/background.jpg Zope2/lib/python/App/www/arrow.gif Zope2/lib/python/App/www/permission.gif HTH, Michael Bernstein.

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ZEO Status?
by Bill Anderson 02 May '00

02 May '00

What's the latest word on ZEO? I have (IMO) a possibly cool technique for eliminating the SPoF for the Storage Provider, and am dying to try it out. :) -- Bill Anderson "Why have snake oil, when you can have the whole snake?" --seen in a sig file in c.l.p

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Re: [Zope-dev] Trouble with trees and XML
by Tres Seaver 02 May '00

02 May '00

"Christian Wittern" <wittern(a)iis.sinica.edu.tw> wrote: > > I am having trouble with the tree tag recently... > > I am trying to display a moderately complex XML Document. I want to have a > navigator in one frame and links to the main-frame. I am trying to use the > tree tag for the navigator part, since the XML is also kind of a tree > structure. I am using the XML Document product 1.0a6, which parses the > document in a nice tree structure. > > The problem is, I don't want all the elements to show up in the tree, rather > I want to select them based on the name of the element. I have elements like > 'head' and 'title', which should show up in the tree, but the other should > be ignored. Any ideas how this could be done? > > Sigh, any help appreciated... Just in case it is helpful, please look at: http://www.zope.org/Members/tseaver/XML_Navigator Tres. -- ========================================================= Tres Seaver tseaver(a)digicool.com tseaver(a)palladion.com

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Re: [Zope-dev] Zope/Python Object Persistence
by Tres Seaver 02 May '00

02 May '00

"Adam Pawliuk" <apawliuk(a)aui.ca> wrote: > > This is a multi-part message in MIME format. First, please *don't* post MIME/HTML to the list. If you need to reference a file too long to quote inline, upload it someplace (e.g., join www.zope.org and put it in your member folder there) and post the URL. > Is there a way that I can maintain persistent python objects in memory = > through the Zope Server? > > As a simple example if I create a counter in a python module and access = > it through an external method, the module seems to get reloaded every so = > often, so the counter will get reset. Can I avoid this? Basically I just = > want to keep a persistent hashtable/Dictionary. > > MODULE: > ************************************************************* > __persist =3D {}; > __persist['count'] =3D 0; > > def getNextCount(): > __persist['count'] =3D int( __persist['count'] )+1 > return __persist['count'] > ************************************************************ > External method in DTML: > > <dtml-var "getNextCount()"> > > thanks in advance You _don't_ want to store such a volatile object in the ZODB -- the tradeoffs of its transaction/undo machinery are almost completely opposed to such usage. What you need is to persist the value to the filesystem (using FSSession or a workalike) or to a relational backend (using SQLSession). On the whole, I would recommend checking out FSSession on the products page: http://www.zope.org/Products Tres. -- ========================================================= Tres Seaver tseaver(a)digicool.com tseaver(a)palladion.com

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(no subject)
by Sergey Trofimov 02 May '00

02 May '00

Hello Zopistas. Is it possible to assign password-like text fields for string properties in property sheet of ZClass? E.g. for password property... -- Regards, Sergey.

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TransparentFolders version 0.1 released
by Shane Hathaway 02 May '00

02 May '00

Zopistas, I've made the first version of TransparentFolders available. http://www.zope.org/Members/hathawsh/TransparentFolders See the description online. It's easy to use; just add a Transparent Folder to any Folder and the folder will effectively acquire from all contained transparent folders. There are currently no rules for selecting among overloaded transparent objects; that issue can be dealt with later. This is just a proof of concept and something to try out. It seems to be plenty fast enough except when used with the version of Zope in the CVS repository, where it slows down the startup procedure dramatically. Versions 2.1.6 and below don't seem to suffer from the slowdown. The slowdown is apparently related to the new help system. The bulk of the product (which is less than 5K compressed!) is a patch to ObjectManager which causes it to search for transparent objects when necessary. I took advantage of Python's flexibility to patch ObjectManager without actually overwriting it (that's why it works with multiple versions of ObjectManager). There is a chance that some product out there will conflict with the patch, however. I recommend you make a backup of your Zope installation (or if you're savvy, just back up lib/python/OFS/__init__.py) because it does need to modify one source file directly. If TransparentFolders conflicts with another product, you should be able to simply remove the lib/python/Products/TransparentFolders directory and the patch will be gone. Anyway, good luck. It should be very useful for many Zopistas! Shane

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