Zope-Dev: Curious Problem

[Dylan Reinhardt]

[ already answered on the Zope list ]


On Fri, 2003-04-25 at 07:58,  wrote:
> Hi,
> 
> I have a python external method which reads from an external database,
> unpickles a class object, and concatenates some of the object's
> properties into a string which is returned by the external method.
> The class definition is included in the module.
> 
> When I run it from the linux prompt in the Extensions directory it
> behaves exactly as it should. The class is successfully unpickled, the
> properties are read and the string is returned.
> 
> However, when I set it up as an external method and call it I get the
> infamous:
> 
> Error Type: SystemError
> Error Value: Failed to import class MyObject from module __main__
> 
> >From my perspective Zope should be 'blissfully unaware' of the
> existence of the class or the instantiation of the object.  Since the
> object is only accessed in the external method, the module contains
> the class definition, and only a string is returned, why is this
> happening?
> 
> What am I missing here?
> 
> Platform: Red Hat 7.3, Python 2.1.3, Zope 2.51
> 
> Curious,
> 
> Sean
> 
> P.S. Also posted to zope-dev but I wanted the 'python' perspective as
> well