It must be any instance of an ExtensionClass. I think Python instances used to be true-for-callable as well, but that must have been fixed.
Python 2.1.3 (#5, Aug 15 2002, 10:41:31) [GCC 2.95.3 19991030 (prerelease)] on linux2 Type "copyright", "credits" or "license" for more information. >>> from ZODB.PersistentList import * >>> callable(PersistentList()) 1 Jeremy _______________________________________________ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
