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Re: [Zope] Extending Zope system code without editing
by Dylan Reinhardt 04 Mar '03

04 Mar '03

At 06:56 AM 3/4/2003, Dennis Allison wrote: > >From time to time I want to do things to the Zope system code, for >example, add a new method or override a method in a pre-existing class. Is >there a good way to do this within the Zope system structure. I'd like to >keep my changes isolated and use the inheritance and namespace mechanisms >of Python rather than hard edits. Inheritance is probably your answer here. You can either subclass an existing object or mix your code into an existing object's definition. Say you want to add a method to a Folder. One way is to make a basic product called my_folder, mix in Folder as a base class and then start overriding and extending. Then, in the ZMI you'll have the option of whether to use a standard Zope folder or one of your custom Folders. On the other hand, you could create a Python module called my_folder_changes, create a simple class called my_folder and use it to define the behaviors you want to see. Then add your class to the *front* of the list of base classes inherited by Folder. This won't override anything actually defined in Folder's class definition... you'll need to comment those out to override them with this technique. Is that what you're looking for? HTH, Dylan

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Re: [Zope] STX - how to add new function
by Jaroslav Lukesh 04 Mar '03

04 Mar '03

Hi Andreas, Thanks for that starting point. But I have no success with any of 3 files (it is need to be modified ClassicStructuredText.py, DocumentClass.py, HTMLClass.py) Does somebody have some modified version of STX sources or some how-to? Many thanks, J. Lukesh ---------- Odesílatel: Andreas Jung <lists(a)andreas-jung.com> Checkout lib/python/StructuredText/DocumentClass.py. But I recommend to keep your fingers from the code unless you really know what you are doing.

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persistent object with non-persistent attributes
by Jerome Alet 04 Mar '03

04 Mar '03

Hi, I would like to create a python Zope product which allows me to create persistent objects. but these objects have (as subobjects ?) complex attributes which are themselves instances of a non-Zope related class, and which should not be persistent (think hardware plug&play), because they are recreated every time a method is called on my instance. I think I could do (untested) : myZopePersistentClassInstance.complexAttr = myNonZopeClass() but this will probably, if it works, bloat by ZODB. is there a way to do this without suffering from severe bloat ? thanks in advance PS: I know this may not be very clear... Jerome Alet -- (c) 1928-???? The letters U, S, and A and the U.S.A. flag are the copyrighted property of Disney Enterprises Inc. Any infringment will be punished with the death penalty. Details : http://yro.slashdot.org/article.pl?sid=03/01/15/1528253&tid=123

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how to test to find image
by Steven Smith 04 Mar '03

04 Mar '03

I'm email this list again since several were nice enough to respond last time. I new and this list is helpful. I'm in Plone and want to display an image at the top of a UI box (like to top of the related or navigation box). However this image needs to change depending on what subfolder/branch I'm at. Normally I have seen the use of the tag "here/myimage.gif". My understanding is the default is to start at the top most directory and work its way through the site until it finds the first occurance of myimage.gif. I would like to reverse this behavior. I need it to start looking in the current location and work upwards until it finds myimage.gif. The reason is that under each of my first level subfolders I have placed a myimage.gif file. Even if I'm maybe four folders down I want to display that myimage.gif from the current branch (which my be three folders up). However if the normal logic of 'here' works it will find the wrong myimage.gif. <div class="box"> <img tal:replace="structure here/myimage.gif" /> <other tags and things .....> </div> Thanks, Steven

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Extending Zope system code without editing
by Dennis Allison 04 Mar '03

04 Mar '03

>From time to time I want to do things to the Zope system code, for example, add a new method or override a method in a pre-existing class. Is there a good way to do this within the Zope system structure. I'd like to keep my changes isolated and use the inheritance and namespace mechanisms of Python rather than hard edits.

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RE: [Zope] Supported Processor for Zope
by McDonnell, Larry 04 Mar '03

04 Mar '03

Thanks, this is what I thought but its better to throw out the question if you are unsure. -----Original Message----- From: zope-admin(a)zope.org [mailto:zope-admin@zope.org]On Behalf Of Dennis Allison Sent: Tuesday, March 04, 2003 9:32 AM To: McDonnell, Larry Cc: 'Zope@Zope. Org' (E-mail) Subject: RE: [Zope] Supported Processor for Zope On Tue, 4 Mar 2003, McDonnell, Larry wrote: > Hi, > > Sorry microprocessors (Intel, AMD, etc) > Zope, for the most part, has no machine dependencies. As long as the needed OS support, Python, and a suitable C/C++ compiler are there, you should have no problem. _______________________________________________ Zope maillist - Zope(a)zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )

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RE: [Zope] Supported Processor for Zope
by McDonnell, Larry 04 Mar '03

04 Mar '03

Hi, Sorry microprocessors (Intel, AMD, etc) -----Original Message----- From: Dennis Allison [mailto:allison@sumeru.stanford.EDU] Sent: Tuesday, March 04, 2003 9:10 AM To: McDonnell, Larry Cc: 'Zope@Zope. Org' (E-mail) Subject: Re: [Zope] Supported Processor for Zope On Tue, 4 Mar 2003, McDonnell, Larry wrote: > > After a couple of Google searches, I cannot find the answer to this > question, What processors are support or have worked with Zope? I am in the > process of creating some zope services for some customers. In order to keep > cost down but at the same time avoid any compatibility issues, I am asking > the list this question. Thanks. > Can you clarify your question? What do you mean by "processors"? Zope requires Python (duh..) and C/C++ for extensions and an operating system that supports sockets with the features required by Zserver. Most folks use Squid or Apache in front of Zope which adds additional constraints.

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Mounted temporary folder and ZEO ?
by Geir Bækholt 04 Mar '03

04 Mar '03

Hello Zopistas, I am using "Mounted Temporary Folder" in a chat product i am building, and it suddenly struck me that it might not behave transparently in a ZEO-cluster.. Is there any reason for me to worry ? - does it act just like a normal zope folder when it comes to ZEO-clustering? -- Geir Bækholt

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Supported Processor for Zope
by McDonnell, Larry 04 Mar '03

04 Mar '03

Hi, After a couple of Google searches, I cannot find the answer to this question, What processors are support or have worked with Zope? I am in the process of creating some zope services for some customers. In order to keep cost down but at the same time avoid any compatibility issues, I am asking the list this question. Thanks. Larry McDonnell Proton Energy Systems 10 Technology Drive Wallingford, CT 06492 (203) 678-2181 Email:lmcdonnell@protonenergy.com www.protonenergy.com

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Using win32com from external method
by Micheál Healy 04 Mar '03

04 Mar '03

Hi, I want to use win32com.client in a python script which I wish to access as an External Method. When I run the script outside of Zope, it works fine. Then I add a method declaration, and try to add the same script as an extenal method and I get the following error: Error Type: ImportError Error Value: No module named pythoncom The import statements look like this: import pythoncom import win32com.client When I run outside Zope, I dont actually need to import pythoncom. I downloaded COMObject-1.0.1-nonbin.tgz and took a look at what I may need to do to get it working (figured that if I could get this to work, my problem would be solved). The following is from the README.txt: Probably the easiest way to get the win32 extensions working with Zope is to use your own Python, rather than the Python that comes with Zope. If this is what I have to do, then how? Ive looked for anything on this, but its not the easiest thing to search for. If I do this, will I still be able to access the things I have added in the \Zope\lib\python\Products, such as TinyTable, Calendar and ZGDChart? Thanks for any help, Micheál Micheál Healy Engitech Ltd. 01 6204 516

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