[Zope] testing for property

[Dieter Maurer]

Tom Cameron writes:
 > I am trying to write a script that upgrades instances of a class. I have
 > added new properties to my python product Class and I wish to run a method
 > to check the old instances and add properties if necessary.
Why would you want to do that?

   Normally, you have a default in your class.
   Only when the instance changes the property value, it will
   get its own copy of the property.

 > I find that when I use the hasProperty('propname') method it always returns
 > true.
Use "self.__dict__.has_key('propname')".
Will work only in External Methods or other file system
Python code....


Dieter