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python10 digest + articles at pythonjournal.cognizor.com comprise PythonJournal 2(2)
by editor＠pythonjournal.com 17 Feb '02

17 Feb '02

Python Journal new issue 2(2) is out and about at pythonjournal.cognizor.com with articles and a fairly detailed digest of the content of the 4 very full days of the 2002 Python10 conference. Focus in the articles of this issue is on deepening understanding of how python works -- recursion, PySpy. First -- The pythonista thinks about repeating functions: Alternative recursion methods with iteration splitoff auxiliaries, having different oopses and efficiencies. Then -- Inspect your own pet python's looping and leaping. In realtime! Tutorial on Malcolmson's PySpy shows what documentation ;) looks like inside out, how basic program structures including recursion vs. iteration really slither along. Screenshots, congeners (and cf. inspect.py). PySpy's 5th generation architecture mixes several programming languages like many of the python10 works. Expand to the level you want, then watch the changing of your variables and function calls as python proceeds along its train of thought.... With its introspection, PySpy teases us with the possibility of python consciousness. Great study tool. NOTE: Usually at <A HREF="http://pythonjournal.com"> http://pythonjournal.com</a>, look for it presently at <A HREF="pythonjournal.cognizor.com">***pythonjournal.cognizor.com***. NB. Dr. S. Candelaria de Ram Editor-in-Chief, PythonJournal.com editor(a)pythonjournal.com

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RE: [Zope] Zope-2.5.0-src + python2.1.2 + OpenBSD 3.0 don't work
by Graham King 17 Feb '02

17 Feb '02

I agree with Jens below. I installed Zope 2.4.3 to openBSD, and got the same problem with the same bit of code. The untar truncates the name of this C module. I documented my process, and made mention of fixing this problem. see: http://www.zope.org/Members/gking/ZEO%20install%20on%20openBSD cheers Graham this sounds like the errors you get on systems with a broken "tar" utility where the tarballs get botched during expansion (solaris, mac os x). the workaround is to use the gnu version of tar instead. jens On Friday, February 15, 2002, at 03:58 , Robin S. Socha wrote: > It's me again, the power-luser from > http://lists.zope.org/pipermail/zope/2002-January/107872.html > > So I followed Chris McDonough's advice and installed 2.1, and then > 2.1.2. Still no luck: > > Python 2.1.2 + Zope fresh from sources. The same two tarballs build and > run on FreeBSD 4.5. > > ,----[ zope-error ] > | make: don't know how to make ././src/ISO_8859_1_Splitter.c. Stop in > /usr/local/src/Zope-2.5.0-src/lib/python/Products/PluginIndexes/TextIndex/ > Splitter/ISO_8859_1_Splitter. > | Traceback (most recent call last): > | File "/usr/local/src/Zope-2.5.0-src/w_pcgi.py", line 39, in ? > | if __name__=='__main__': main(sys.argv[0]) > | File "/usr/local/src/Zope-2.5.0-src/w_pcgi.py", line 37, in main > | import wo_pcgi; wo_pcgi.main(me) > | File "/usr/local/src/Zope-2.5.0-src/wo_pcgi.py", line 33, in main > | import build_extensions > | File "/usr/local/src/Zope-2.5.0-src/inst/build_extensions.py", line > 38, in ? > | > make('lib','python','Products','PluginIndexes','TextIndex','Splitter','ISO_8 859_1_Splitter' > ) > | File "/usr/local/src/Zope-2.5.0-src/inst/do.py", line 63, in make > | do('make') > | File "/usr/local/src/Zope-2.5.0-src/inst/do.py", line 32, in do > | if i and picky: raise SystemError, i > | SystemError: 512 > | > `---- _______________________________________________ Zope maillist - Zope(a)zope.org http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )

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Question about .tag() attribut of images
by Sven Rudolph 17 Feb '02

17 Feb '02

Hello zopeusers. I have a little Problem with images. I have imported about 2000 images into zope using the Zope ftp server. Unfortunately all those pictures now have the extension .gif or .jpg or .jpeg. If I try to include a picture into a DTMLDocument with <dtml-var "mypicture.gif.tag()"> Zope tells me that the object mypicture has no attribute "gif". It seems to me, that using an object id with a dot makes access to attributes, well, difficult. But... If I write the following DTML code: <dtml-in mypicturefolder> <dtml-var tag><br> </dtml-in> all the pictures are correctly represented by <img>-tags with width, height and alt. The following works either: <dtml-var mypicture.gif> -> complete <img>-tag But.. <dtml-var "mypicturefolder.mypicture.gif"> doesn't work -> Attribute error - mypicturefolder.mypicture.gif has no attribute gif I had a look at the documentation and found the "namespace variable". It says it has to be used for "illegal" object ids (with . or , or anything inside). So I tried: <dtml-var _['mypicturefolder.mypicture.gif']> and <dtml-var _['mypicture.gif']> but the result is an key error-> object doesn't exist. Well, now you could say "Why don't you just use <dtml-var mypicture.gif>?". Because this seems to work in "mypicturefolder" only. But if I am in a different folder I have to use <dtml-var "mypicturefolder.mypicture.gif">, and this doesn't work. If I rename mypicture.gif to mypicture_gif everything works fine, even from distant folders, but this isn't an option with 2000 pictures referenced by nearly 10000 Documents (did I mention the documents?). Anyway. The next problem is, that I have written my own image product which inherits from Image and adds some extra attributes (description, keywords, etc.), so I have to find a way to acccess those attributes from anywhere. Now the time has come to ask for some help. Am I missing something ovbious? Is it described in the documentation, but I'm to blind to see it? I guess so :-( Thanks in advance for your help Greetings Sven Rudolph

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Re: System Error from Zope Book Example
by Dan Shafer 17 Feb '02

17 Feb '02

The plot thickens. As I continue to try to work through this problem in an effort to learn something, I find this peculiarity. If I copy the script that is generating the error from a sub-folder of my Zope instance to the root folder, rather than a Zope error, I get a file download dialog indicating I am trying to download a file of type application/x-httpd-cgi. The external method this script is calling is stored at the root level of the Zope instance. So here's the script that's causing the problem: for image in context.objectValues('Image'): if not image.hasProperty('original_id'): context.makeThumbnail(image.getId()) the makeThumbnail script it's calling is an external defined at the root level. It works fine when run from a URL against a single image whose ID is provided as an argument (as described on pp. 156-157 of the Zope Book). But if I attempt to call it from this for-in loop in a non-external Python script, I get these weird conditions. Mysteriouser and mysteriouser. -- Dan Shafer, Personal Creativity Trainer and Consultant Trained Hartman Value Profile Analyst http://www.danshafer.com/valueprofile.html

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Re: [Zope] Can't have custom 404 (NameNotFound) Errors?
by Ulrich Wisser 17 Feb '02

17 Feb '02

Hello, is it possible that in case of a 404 error the AUTHENTICATED_USER variable is not accessible? Thanks Ulli

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how to create an object programmaticaly
by Daniel Meier 17 Feb '02

17 Feb '02

hi there I'm trying to create an object in a python script, like this it works: context.manage_addProduct['ChernobylObjects'].<my zclass>.createInObjectManager('myId', container.REQUEST ) the object is created in the same folder as I call the script. but now I'd like to create a new object in another folder (not in a parent, not in a sibbling an not in a subfolder) like this: /folder1/subfolder (I'm here) /folder2/subfolder2/subfolder3 (that's where I'd like to create my new object) I have the destination path for my object in a string variable. this path changes constantly (for some special apllication reasons). how can I create my object with the path for it in a string variable? regards daniel

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newbie question: restart zope remotely?
by Robert Hood, Ph.D. 17 Feb '02

17 Feb '02

Hi, I just installed a product (formulator) and used the zope management console to restart zope (version 2.5, windows). In the past zope has come right back up, no problem. But not this time. So I'm not geographically near my server, and was wondering if I can run a script to restart remotely? thanks for any suggestions, Robert (who will now only install products when he is physically in front of the machine and can stop and start zope)

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print REQUEST
by Ulrich Wisser 17 Feb '02

17 Feb '02

Hello, when I do <dtml-var REQUEST> it prints a nice HTML table. Is there any way to make it print plain text? Thanks Ulrich -- Searchengine Know How - Webpromotion - Optimization - Internal Search World Wide Web Publisher, Ulrich Wisser, Odensvag 13, S-14571 Norsborg http://www.publisher.de Tel: +46-8-53460905 Fax: +46-8-534 609 06

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Re: Content Management Design Patterns
by jerry 17 Feb '02

17 Feb '02

Hi Eron, Sorry this went unanswered for so long. Just reading the lists is enough to keep me hopping lately. When I asked Steve if he had replied to you, we discovered that there had never even been a post about our book on zope-announce! Check there for an _even_more_generalized_ blurb. On 12/21/2001 Eron wrote: > Does anyone have a recommendation for "best practices" > for implementing complicated Web patterns like Session Tracking, > Member Profile management (how to store the back-end data), > Multi-cookie storage/retrieval, and "shopping cart" paradigms? > I know that Zope (and specifically CMF) provides for these applications, > but I'd like a resource on the core concepts & principles. > I'm aware that New Riders is publishing another Zope book entitled > "Zope: Web Application Development and Content Management", > and could this be exactly what I'm looking for? Steve Spicklemire, > would you mind whetting our appetites? Well, the term "best practices" does show up in the book here and there... Specifically, several of those topics are covered in advanced chapters (section III), with a bias toward ZPatterns based solutions. As the Zope 3 "Components" model rolls out the ease of integrating Zope modules, and related data, that were developed independently will likely improve. At the time when our book was written, the use of techniques such as ZPatterns seemed a most effective option. There is a detailed example of merging a membership list with an E-Commrce tool (Steve's emarket) in chapters 11, 12, and on integrating user authentication in chapter 13. Regardless, time spent grokking just about any useful Zope/Python technologies will yield a better understanding of the problem domains, and how to render objectish solutions. Thanks for the interest! Jerry S. (for Steve, Kevin & Kim too . . . )

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Re: [Zope] Can't have custom 404 (NameNotFound) Errors?
by Chris Bruce 17 Feb '02

17 Feb '02

That is incorrect. It happens anytime there is a NameNotFound error, try it for yourself before. The standard error show just fine for everything else. Chris --- Jo Meder <jo(a)meder.de> wrote: > Am 17.02.2002, 01:58 Uhr > schrieb Chris Bruce > <chrisabruce(a)yahoo.com>: > > > It appears (Zope 2.4) that one can't catch the NameNotFound Error? > Is > > this true? Whenever I point to a non-existent page, the error > message > > is not the standard_error_html, in fact it appears to be a message > that > > is hard coded in the python code. Is there any way to have a > custom > > 404 message? > > This has been answered earlier this week: The hard coded message > appears > iff your standard_error_html contains errors. > > Jo. > > > -- > Internetmanufaktur Jo Meder ---------------------- Berlin, Germany > http://www.meder.de/ ------------------- fon: ++49-30-417 17 63 33 > Kollwitzstr. 75 ------------------------ fax: ++49-30-417 17 63 45 > 10435 Berlin --------------------------- mob: ++49-170- 2 98 89 97 > Public GnuPG-Key ---------- http://www.meder.de/keys/jo-pubkey.txt __________________________________________________ Do You Yahoo!? Yahoo! Sports - Coverage of the 2002 Olympic Games http://sports.yahoo.com

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