[Zope-dev] property type

[Steve Alexander]

Steve Alexander wrote:
> Tim McLaughlin wrote:
> 
>> According to docs and testing (in the interpreter) I can make a 
>> read-only calculated attribute using property() (I know that setters 
>> do not work w/ non-new-style classes).  So I tried the following:
>>
>> class CMixin:
>>   def getter(self):
>>     return 'test'
>>   prop = property(getter)
>>
>> and when I try to mix in this object w/ a Folder object, the instance 
>> returns <property object at 0x8b45edc> for the 'prop' attribute.  Is 
>> this an issue with pickling or something else?
> 
> 
> In Zope 2, the ExtensionClass that is the C base class used for 
> Persistent classes, doesn't work with python 2.2 properties.

But, you can use a ComputedAttribute to get much the same effect.

--
Steve Alexander