I am working on a patch for Formulator so that its exception classes can be 
imported into a Python Script. the following code works for Zope 2.3 and 2.4 
but I get an unauthorized error when I try to import from this in 2.4 (Just 
tested b4, but not CVS). Here is the code from the module Errors.py in the 
Formulator product package dir:
"""Exception Classes for Formulator"""

# These classes are placed here so that they can be imported into TTW Python
# scripts. To do so, add the following line to your Py script:
# from Products.Formulator.Errors import ValidationError, FormValidationError

from Products.PythonScripts.Utility import allow_module, allow_class


class FormValidationError(Exception):

    def __init__(self, errors, result):
        Exception.__init__(self,"Form Validation Error")
        self.errors = errors
        self.result = result

class ValidationError(Exception):
    def __init__(self, error_key, field):
        Exception.__init__(self, error_key)
        self.error_key = error_key
        self.field_id = field.id
        self.field = field
        self.error_text = field.get_error_message(error_key)


If you create a python script containing:
from Products.Formulator.Errors import ValidationError, FormValidationError

You get an Unauthorized exception in 2.5, but not in 2.4 or 2.3. I realize 
this should probably go in the collector, but I wanted to make sure I wasn't 
doing something dumb first. Thanks.

  Casey Duncan, Sr. Web Developer
  National Legal Aid and Defender Association

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