Chimezie is right... one clarification: you don't necessarily need to make the counter an attribute of the object the getNextCount() method is implemented on, but it needs to be an attribute of some object that sublclasses Persistence.Persistent (any standard Zope object). Note also that you will undoubtedly be bitten at some point during the writing of code in Zope by the somewhat unobvious fact that you need to treat mutable Python objects that are attributes of persistent objects as immutable. So instead of (for example): self.a[0] = b You'd need to do something like: tmp = self.a tmp[0] = b self.a = tmp Doing this triggers the persistence machinery. A different, short-hand way to do this is: self.a[0] = b self.a._p_changed=1 Chimezie Thomas-Ogbuji wrote:

If you make the dictionary an attribute of the zope object the getNextCount() method is called on, it should be pickled automatically by ZODB. You'll need this logic in the beggining of getNextCount:

if (attribute exists): increment count attribute else: set attribute to default value (0) and increment

This solution assumes you want a per-object persistent counter. If what you want is a class-wide counter (common to all instances) then I'm not sure how you'd do this besides: 1) using ZPickle product (might be overkill) 2) using Persistent List product (might be more appropriate)

...

Adam Pawliuk wrote:

Hi,

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 = {}; __persist['count'] = 0;

def getNextCount(): __persist['count'] = int( __persist['count'] )+1 return __persist['count'] ************************************************************ External method in DTML:

<dtml-var "getNextCount()">

thanks in advance

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