September 2006 - Zope

RE: [Zope] custom_zodb.py
by Sinang, Danny 07 Sep '06

07 Sep '06

Per http://www.plope.com/Books/2_7Edition/MaintainingZope.stx#2-27 , it still says write your own custom_zodb.py . Can you point me to the exact location ? Regards, Danny -----Original Message----- From: zope-bounces(a)zope.org [mailto:zope-bounces@zope.org] On Behalf Of Paul Winkler Sent: Thursday, September 07, 2006 9:16 AM To: zope(a)zope.org Subject: Re: [Zope] custom_zodb.py Unless you are using Zope 2.6, don't do that. For Zope 2.7 or later, see the 2.7 version of the book at plope.com. Some chapters were never updated from the 2.6 version but even so it's much improved. For zope 2.7 or later, what you want to do is now done by editing zope.conf. On Thu, Sep 07, 2006 at 08:44:08AM +0800, Sinang, Danny wrote: > In the Zope Book v2.6, it says : > > "Each database connection maintains its own cache (see above, > "Database Cache"), so bumping the number of connections up increases > memory requirements. Only change this setting if you're sure you have > the memory to spare. > > To change this setting, create a file called "custom_zodb.py" in your > Zope installation directory. In this file, put the following code:" > > Am not sure which directory "Zope installation directory" pertains to. > > Is this the fresh directory from the Zope .tar.gz file ? > > Or is this the already-installed directory ? Or would it be the > instance directory ? If so, which subdirectory do I place custom_zodb.py ? > > Regards, > Danny > > _______________________________________________ > 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 ) -- Paul Winkler http://www.slinkp.com _______________________________________________ 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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custom_zodb.py
by Sinang, Danny 07 Sep '06

07 Sep '06

In the Zope Book v2.6, it says : "Each database connection maintains its own cache (see above, "Database Cache"), so bumping the number of connections up increases memory requirements. Only change this setting if you're sure you have the memory to spare. To change this setting, create a file called "custom_zodb.py" in your Zope installation directory. In this file, put the following code:" Am not sure which directory "Zope installation directory" pertains to. Is this the fresh directory from the Zope .tar.gz file ? Or is this the already-installed directory ? Or would it be the instance directory ? If so, which subdirectory do I place custom_zodb.py ? Regards, Danny

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Re: [Zope] Need Help--urgently
by Martijn Pieters 06 Sep '06

06 Sep '06

cpdm cadlab wrote: > thanks for the quick reply. I am glad to be here on active ZOPE > mailing list. Let's keep it on the list then; no personal email please. > I had initially done the way you have suggested, but it doesn't work > in the sense I get a empty list as output, which I know isn't empty. Then something is wrong with the external method. Use a debugger (pdb, Wing, Komodo, etc.) or spurious logging (import logger; logger.getLogger('yourmodule').log) to trace your code. > This made me think that I was making silly mistake. If I run external > method in python shell it shows the mlist, which is non-empty, but if I > ask the same to python script to do what it prints is this : [] > What do you think is wrong. A further code goes like this: > mlist = context.code(uparam) > if len(mlist) == str(0): > print "Sorry no suitable method found in database" > return printed > else: > print mlist > return printed Use "if not len(mlist):"; comparing the length to str(0) is always false. "len" returns an integer, not a string, so 0 == '0' will never be True. You can also call the external method directly if you encode the arguments passed to it in the query string. Just open up a python propmt, import urllib and call urllib.quote on your argument list to hand-construct a URL. Moreover, get decent books on Python and on Web programming in general. Martijn Pieters

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Need Help--urgently
by cpdm cadlab 06 Sep '06

06 Sep '06

I am sure it should be trivial, but being newbee makes me shameless :)    What I am in need of is guideline about how to integrate python script and external python method.    I have a form through which I collect user input and forward it to a python script, which concatenates input in certain pattern and    feeds it to external method. Now external method runs fine and puts the results in a list called mlist. What I want to know is how    do  I  fetch the \"return mlist\" resulting from external method back to the python script which gave the input to it for processing.     The python script is named which searchuparam which gets user input from form and does something like this:uparam = str(0) + \",\" + str(0) + \",\" + str(1) + \",\" + str(0) + \",\" + str(0) + \",\" + str(DO) \\            + \",\" + str(NL) + \",\" + str(0) + \",\" + str(0) + \",\" + str(0) + \",\" + str(0) \\            + \",\" + str(TIME) +  \",\" + str(WM) + \",\" + str(NOP) + \",\" + str(EXP) + \",\" + str(GKH)context.code(uparam)code is the id of external method which processes uparam and at the end has statement return mlist   this mlist is what I am interested in getting back. I want external method to return me this list to my python script searchuparam. I tried reading and did google last week but without success. Any help is appreciated. TIA.yours md

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RE: [Zope] Zope hangs when database takes too long to respond
by Sinang, Danny 06 Sep '06

06 Sep '06

Sorry for the typo error. The subject should read "hangs", not "hands" . ________________________________ From: zope-bounces(a)zope.org [mailto:zope-bounces@zope.org] On Behalf Of Sinang, Danny Sent: Wednesday, September 06, 2006 10:56 PM To: zope(a)zope.org Subject: [Zope] Zope hands when database takes too long to respond Hello, We wrote an application (on Zope v2.7.6-final) that queries a MySQL database via ZMySQLDA v2.0.8. Whenever the MySQL server experiences heavy load, Zope seems to hang, such that we can't even access the ZMI. Is this a bug in version 2.7.6 or ZMySQLDA ? Or are there some settings I can tweak to adjust some database connection timeout value ? Regards, Danny

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Re: [Zope] Zope 2.9.3/2.9.1 On Suse 10.1 box version
by Jeremy Smith 06 Sep '06

06 Sep '06

Howdy-- I just ran into this same problem. After much poking around, it turned out that the source of the problem was that the zlib module for Python had not been compiled because I didn't have the zlib development stuff (in zlib-devel on RH and similar, not sure about Suse) installed. Installing zlib-devel, then recompiling Python from source solved the problem. Best, Jeremy. zope-request(a)zope.org wrote: >Date: Wed, 5 Jul 2006 20:51:28 +0200 >From: dieter(a)handshake.de >Subject: Re: [Zope] Zope 2.9.3/2.9.1 On Suse 10.1 box version >To: lists(a)weisglass.net >Cc: zope(a)zope.org >Message-ID: <17580.2608.567655.46659(a)gargle.gargle.HOWL> >Content-Type: text/plain; charset=us-ascii > >Ofer Weisglass wrote at 2006-7-5 01:38 +0300: > > >>> ... >>>I updated the python to the last version and this is what I get after the >>>zope installation was over with no errors (already created instance, >>>username and password) >>> >>>Traceback (most recent call last): >>> ... >>> setImplementation("C") >>> File "/usr/software/zope/lib/python/AccessControl/Implementation.py", >>>line 51, in setImplementation >>> from AccessControl import ImplC as impl >>> File "/usr/software/zope/lib/python/AccessControl/ImplC.py", line 30, in ? >>> from ImplPython import RestrictedDTML, SecurityManager, >>>ZopeSecurityPolicy >>>ImportError: No module named ImplPython >> >> > >This looks like a missing installation step (generation of the >C-extensions did not happen). > >Recheck the installation instructions and try again. > > > > -- Dieter >

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Problems starting ZEO with zeoctl
by Ben 06 Sep '06

06 Sep '06

I am receiving error messages when attempting to start ZEO in daemon mode. I have setup ZEO according to: http://plone.org/documentation/tutorial/robust-installation I have tried the Plone setup list, but their suggestions (changing the permissions on zeo/log/ and related files) did not lead to a resolution. I receive an error message and a progressive series of dots when I attempt to start ZEO: [zope@localhost zope]$ zeo/bin/zeoctl start . Traceback (most recent call last): File "/opt/zope/zope/lib/python/zdaemon/zdrun.py", line 719, in ? main() File "/opt/zope/zope/lib/python/zdaemon/zdrun.py", line 716, in main d.main(args) File "/opt/zope/zope/lib/python/zdaemon/zdrun.py", line 243, in main self.run() File "/opt/zope/zope/lib/python/zdaemon/zdrun.py", line 256, in run self.opensocket() File "/opt/zope/zope/lib/python/zdaemon/zdrun.py", line 278, in opensocket sock.bind(tempname) File "<string>", line 1, in bind socket.error: (13, 'Permission denied') . . . . . . . . [dots continue to appear at a regular interval] If I start ZEO using: zeo/bin/runzeo then all is fine, the Zope clients connect, etc. but it logs to the console and I want to run in daemon mode. I am using: Plone 2.5 Zope 2.9.4 Python 2.4.3 CentOS 3.7 TIA, Ben

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Hmm... Localizer or Localizer
by Peter Bengtsson 06 Sep '06

06 Sep '06

What's going on here?? Which is which? http://www.ikaaro.org/localizer or http://www.j-david.net/software/localizer/ They're both zope products and both with the same name. Perhaps the author of the "deprecated" page could put a redirect or something to the new one. -- Peter Bengtsson, work www.fry-it.com home www.peterbe.com hobby www.issuetrackerproduct.com

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Re: [Zope] Change the encoding of a single ZPT page
by Luiz Fernando Bernardes Ribeiro 06 Sep '06

06 Sep '06

2006/8/31, Andreas Jung <lists(a)zopyx.com>: > > > > --On 31. August 2006 19:28:54 +0200 Dieter Maurer <dieter(a)handshake.de> > wrote: > > > Luiz Fernando Bernardes Ribeiro wrote at 2006-8-30 14:08 -0300: > >> 2006/8/29, Andreas Jung <lists(a)zopyx.com>: > >> ... > >> After trying a lot of things, I found the problem is really in the > >> zpublisher realm, no matter what kind of encoding trick I use, even > with > >> a python script, the output is converted to the default encoding if I > >> use any variable or dynamic value from the database. > > > > If you were right (which I still hope you won't) than someone > > severely misunderstood the meaning of "default". > > > > I think he is not right. > > -aj > > Zope did respect the default setting when I changed the charset header in the file. The lesson learned is: Working with two encoding charsets is very trick, and even trickier if you use the ZMI to edit files. I had to create a simple ZPT file with the initial XML block and "inject" the rest of the xml data, including variables and database, using a tal:content pointing to a python script encoding everything to utf-8. The ZPT file was needed as simple way to change the charset header trough the ZMI. When you change the charset trough the ZMI Zope trows an exception if it find any non-conforming character, the problem is that since the default charset is set to iso Zope reencodes my file to iso when it generates the editing form field so when I submit it back Zope raises an exception. Considering I can't change everything to utf-8 I will have to live with it and maybe find a simpler pattern to change the charset without raising an exception (maybe the dummy tal:define?). I hope it help others. Thanks for your help and time, -- Luiz Fernando B. Ribeiro

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Re: [Zope] zope 3 invisibility
by David H 05 Sep '06

05 Sep '06

David H wrote: > Carlos de la Guardia wrote: > >> Hello everyone, >> >> I frequently blog about Zope, and recently posted a list of 10 >> reasons why I think Zope 3 is kind of invisible to the Python >> community (see my blog at http://blog.delaguardia.com.mx >> <http://blog.delaguardia.com.mx>). One of the things that I talk >> about in that post is that the Zope community tends to interact more >> through its mailing lists than its blogs, as opposed to other >> so-called modern frameworks, like Django and Turbogears. >> >> I have been following the efforts of the Zope 3 developers and >> sometimes wonder why this invisibility effect takes place. That's why >> I decided to see if anyone on this list feels like commenting about >> this, or any of my other 10 points. I am very interested in the >> dynamics of the Zope community and the place of Zope in the larger >> Python community, and would be very thankful for any comments, here >> or on the blog. >> >> Thanks very much. >> >> Carlos de la Guardia > > My invisibility with Zope 3 is Zope 2. When I think of something Zope > 2 is failing to provide I will try Zope 3 . I see Django and > Turbogears as "toys" by comparison :-) > > David >

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