- Zope - Zope lists

objects in scope of REQUEST
by Jim Abramson 01 Oct '04

01 Oct '04

Hi again everyone, I'd like my Product to be able to create certain objects on-demand, but only once per REQUEST. If via DTML or PythonScript etc ask for the same object more than once during the REQUEST, my Product won't create an additional instance. But most importantly, I need to make sure that these objects get destroyed when the REQUEST is done - so I don't leave a bunch of objects hanging around forever. Is this possible? I've seen somewhere that Temporary Folder can do this, but it looks as if that holds onto objects until Zope is shutdown - not what I'm looking for. Thanks for any hints, advice, or pointers to where to look for more info. btw - is anyone else out there timing out trying to hit zope.org? I can't even get cached pages from google. Jim

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RAM Cache Manager doesn't work for my script
by Vital Lobachevsky 01 Oct '04

01 Oct '04

Hi, all I'm trying to use RAM Cache Manager to cache a Python Script object. The script is pretty simple. Just a call of a SQL Method and some logic. I've made this script cacheable using "Cache" tab, ran this script several time. Then went to "Statistics" tab of Cache Manager. But the cache doesn't work -- I see only zeros opposite my script. What's wrong? How to get the cache working in this case. Any help greatly appreciated. Thanks, -- -tick

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Zope.org down for maintenance
by Paul Winkler 01 Oct '04

01 Oct '04

Apparently this wasn't announced here, several people are asking about it... zope.org is down for maintenance at the moment, it will be back up later today. -- Paul Winkler http://www.slinkp.com

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content.asp?content_category_id=1
by John Poltorak 01 Oct '04

01 Oct '04

How can I import a file called content.asp?content_category_id=1 to Zope? Neither that name or content.asp%3Fcontent_category_id=1 appear to be acceptable. -- John

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tal:attributes question
by Laura McCord 01 Oct '04

01 Oct '04

I have this: style="position:absolute;left:180;top:25;z-index:1;visibility:hidden;" I need to make 'top' change after each iteration. So, I have a little python operation called position that will return a new value and I want to make 'top' contain that value. My tal:attributes... looks like this => tal:attributes="id string:${box}" I was thinking about tweaking the tal:attributes to include 'style' <div tal:attributes="id string:${box}; style string:position:absolute;left:180;top:${position};z-index:1;visibility:h idden;"> Of course, this won't work merely because of all the semicolons. Does anyone have an idea of how I would go about this? Maybe my approach is not the best way. Thank You, Laura

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ZClasses
by Eddy Ilg 01 Oct '04

01 Oct '04

Hi, I am getting started with Zope and really enjoying it. I am reading the Zope book and tumbled over this comment: Anonymous User - Apr. 29, 2004 10:57 am: According to the ZopeWiki, you should NEVER use ZClasses. http://www.zopewiki.org/ZopeDosAndDonts Anonymous User - Sep. 25, 2004 1:10 pm: Why do I learn about ZClasses if I am not supposed to use them? (I checked zopewiki, it really says you aren't supposed to!) Should I use ZClasses? If not what should I use instead? Eddy

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strategies for using external py packages
by Jim Abramson 01 Oct '04

01 Oct '04

Hi, Can anyone recommend a good resource, online docs, examples that specifically deal with methods/best practices/caveats for using external python code libs within Zope. I have read the relevant chapters in Zope Book and done quite a bit of googling but can't seem to find detailed material on this. My situation involves, on the one hand, a sizeable 'instance space' application, and on the other, some python modules/packages that I need to teach the instance-space stuff to use. The instance app is too vast to realistically rewrite as a zope Product all in one shot - therefore I'm looking for a sane way to gradually add external functionality (and later, offload existing functionality from instance -> external). What I'm most interested in is a discussion of External Methods vs. Products as a means for doing this, memory and performance considerations, etc. The external code should know nothing about Zope, ZODB etc - so I suspect what I need to design is essentially some sort of proxy layer. (If this isn't specific enough I can happily elaborate.) Any suggestions welcome. Thanks, Jim

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RE: strategies for using external py packages
by Jim Abramson 01 Oct '04

01 Oct '04

Thanks, Tres, for your quick reply. Might I ask a followup question (you may refer me to some existing docs as well, that'd be great) - In the past I've messed with simply having a Script (Python) that goes: from Products.MyProduct.mymodule import mymethod result = mymethod.dosomething() ...this is without having any kind of proper 'instance' of the Product in my Zope instance. It's worked, though a) it's kinda messy, and b) I've never really been able to determine if this exposes me to memory leak problems (so far so good) or has other negative impacts or risks. How do things differ between this 'lo-fi' approach, and that of explicitly instantiating the Product somewhere in my Zope tree as you suggested? Thanks again, Jim -----Original Message----- From: Tres Seaver [mailto:tseaver@zope.com] Sent: Friday, October 01, 2004 11:32 AM To: Jim Abramson Subject: Re: strategies for using external py packages Jim Abramson wrote: > Can anyone recommend a good resource, online docs, examples that > specifically deal with methods/best practices/caveats for using > external python code libs within Zope. > > I have read the relevant chapters in Zope Book and done quite a bit of > googling but can't seem to find detailed material on this. My > situation involves, on the one hand, a sizeable 'instance space' > application, and on the other, some python modules/packages that I > need to teach the instance-space stuff to use. The instance app is > too vast to realistically rewrite as a zope Product all in one shot - > therefore I'm looking for a sane way to gradually add external > functionality (and later, offload existing functionality from instance > -> external). What I'm most interested in is a discussion of External > Methods vs. Products as a means for doing this, memory and performance considerations, etc. > The external code should know nothing about Zope, ZODB etc - so I > suspect what I need to design is essentially some sort of proxy layer. > (If this isn't specific enough I can happily elaborate.) Write a simple Zope product which provides a "façade" object for your package; then add an instance of that object to your Zope, and have your templates / scripts use the external library through it. In a CMF / Plone application, such an object would be a "tool". Tres. -- =============================================================== Tres Seaver tseaver(a)zope.com Zope Corporation "Zope Dealers" http://www.zope.com

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[ANN] Zwiki 0.35 released
by Simon Michael 01 Oct '04

01 Oct '04

Summary: Spaced wikiname display, a basic MoinMoin page type, better search engine indexability, i18n updates, bugfixes. See http://zwiki.org and http://zwiki.org/ReleaseNotes . I didn't have time for a release candidate, I just called for help with bugs and patches and released when I felt it was ready. This simplified things nicely. Thanks for your input. As always, more documenters/bug trackers/translators/developers/funders are welcome. -Simon

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Re: [Zope] Create image with PIL in Zope
by Bruno Miguel Silva 01 Oct '04

01 Oct '04

On Friday 01 October 2004 15:25, John Ziniti wrote: > Bruno Miguel Silva wrote: > > When i use the "ImageFont.load('pathToFont.pil')", that causes an > > Error Type: IOError > > Error Value: cannot find glyph data file > > i don' understand, because i have the ".pbm", and it works in command > > line. > > I have problems with using PIL under Zope as Zope has a > module called Image, and PIL has a module called Image, > and the Zope one is the one that gets imported instead > of the PIL one when running under Zope (but not when > running on the command line). > > I end up munging my PIL installation, so that modules > that have: > > import Image, ImageFile > > get changed to read instead: > > from PIL import Image, ImageFile > > This usually works for me. I usually only have to munge > the few "plugin" modules for the types of images I am > creating, like "JpegImagPlugin.py" and "PngImagePlugin.py". > > You may have to munge other modules. > > HTH, > > John Z yes, it worked! thanks --Bruno

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