Hello, I have been fighting a problem with PythonMethods/ZClasses. I have a ZClass, MyTestClass, which has four methods: method1 (DTML Method) method2 (DTML Method) showMethods (DTML Method) showMethods2 (PythonMethod) showMethods is defined as: <dtml-var standard_html_header> <p> method1 = <dtml-var "_.hasattr(this(), 'method1')"><br> method2 = <dtml-var "_.hasattr(this(), 'method2')"><br> nullmethod = <dtml-var "_.hasattr(this(), 'nullmethod')"> </p> <dtml-var standard_html_footer> and showMethods2 is defined: print getattr(self, 'method1') print getattr(self, 'method2') print getattr(self, 'nullmethod') return printed showMethods, when invoked on an instance of my ZClass, returns: method1 = 1 method2 = 1 nullmethod = 0 Bingo. showMethods2, the PythonMethod, results in an AttributeError in DT_Util.py:135. Digging into the Zope source, I see: validate=md.validate # line 135 if validate is None: return v By inserting some print statements, I notice that md is an empty dictionary ([]) when careful_getattr() is called. Therefore, the validate=md.validate line throws an AttributeError. I fixed the "problem", and my code as a result, by changing this to read: try: validate=md.validate except: validate=None if validate is None: return v I have a really strong feeling, though, that I just opened a whole can of worms. Does my change break an intended behavior of Zope? Is it supposed to throw an AttributeError when md does not have a 'validate'? If so, is there a bug in PythonMethods that is causing md to not be initialized properly before the call to careful_getattr()? I am pressed for time on this project, and could really use some insight, here. I am fresh out of ideas, and have hit the limits of my knowledge. Thanks, --Jeff --- Jeff K. Hoffman 704.849.0731 x108 Chief Technology Officer mailto:jeff.hoffman@goingv.com Going Virtual, L.L.C. http://www.goingv.com/