I've just checked in some changes to ExtensionClass, and ZODB in the Zope CVS tree that provide support for user-defined (python) __get/set/delattr__ methods. These methods now have the same semantics as they do in standard Python classes. This means that you can define your own __get/set/delattr__ hooks and they will automatically work with, rather than break, the persistence system's use of the low-level attribute hooks. These changes are available in the Zope public CVS and will be available in future Zope releases, including 2.2 and it's beta releases. The changes are not in the 2.2 alpha1 release. Jim -- Jim Fulton mailto:jim@digicool.com Technical Director (888) 344-4332 Python Powered! Digital Creations http://www.digicool.com http://www.python.org Under US Code Title 47, Sec.227(b)(1)(C), Sec.227(a)(2)(B) This email address may not be added to any commercial mail list with out my permission. Violation of my privacy with advertising or SPAM will result in a suit for a MINIMUM of $500 damages/incident, $1500 for repeats.