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Fabio Tranchitella wrote:
> Happy New Year to everybody,
> I'm working to isolate a core set of ZTK packages which are independent
> from Zope and reusable outside the Zope community. One of them is
> zope.security, which can be used (and it is useful, indeed) with non-zope
> frameworks too.
> While doing it, I'm trying to remove dependencies which are zope-specific,
> to minimize the overhead for developers who are using the whole zope stack
> (like me :)).
I have such a subset in mind myself, which I call the "bicycle seat
- their dependencies.
> zope.security depends on zope.exceptions because it imports this symbol in
> from zope.exceptions import DuplicationError
> zope.exceptions defines DuplicationError as:
> class IDuplicationError(Interface):
> class DuplicationError(Exception):
> """A duplicate registration was attempted"""
> The zope.exceptions package contains "exception interfaces and
> implementations which are so general purpose that they don't belong in Zope
> application-specific packages.", as stated by the README.
> I propose to make the remove the dependency between zope.security and
> zope.exceptions with a conditional import:
> * if zope.exceptions is available, use DuplicationError from it;
> * if it is not available, define a zope.security-specific DuplicationError
> (which inherits from ValueError, maybe).
> As using zope.exceptions only make sense if you are checking the exception
> type importing its interface from the zope.exceptions package, and thus
> depending on it, I see no risk in such a change.
> Thoughts? Comments?
+1. I wouldn't have thought zope.security useful elsewhere, but I take
it you are using it in applications which don't use the rest of the stack.
Tres Seaver +1 540-429-0999 tsea...@palladion.com
Palladion Software "Excellence by Design" http://palladion.com
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