[Zope] using getProperty and catching Unauthorized

[John K. Hohm]

Quoting Casey Duncan <casey@zope.com>:
> After a closer look, it would seem that nearly all of the 'Unauthorized'
> string exceptions have been replaced with a bonified exception object. So
> that is probably why it doesn't work.
> 
> You could try importing this class in the python script using::
> 
>   from zExeptions import Unauthorized
> 
> and catch exceptions of this class. I have a feeling this import is not
> possible fom a python script however (though it probably should be). So that
> leaves you little choice but to either use a bare except, or write the code
> in an external method or other trusted code module.

Thanks for the hint.  I ended up with something pretty simple; I already had an
AllowExports product, so I added this to the bottom of its __init__.py:

# This is needed to circumvent stupidness and paranoia
ModuleSecurityInfo('AccessControl').declarePublic('Unauthorized')

In my menu item listing script, I now have this:

from AccessControl import Unauthorized
# ...
    try:
        menu_order = sibling.getProperty('menu_order', None)
        is_folderish = sibling.isPrincipiaFolderish
    except Unauthorized:
        continue