Michel Pelletier wrote:
x = DMC(...) return x.__of__(self)
x must inherit ExtensionClass.Base to get this machinery.
Actually, both x and self must be ExtensionClass instances. One way to be an extension class is to subclass Base, but Persistent is an extension class too that is not a subclass of Base. x must have an __of__ implementation. Not all extension classes implement __of__. In this case, x's class wants to subclass one of the acquisition base classes, Implicit or Explicit. Jim -- Jim Fulton mailto:jim@digicool.com Technical Director (540) 371-6909 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.