Hi, I'm a relatively experienced python programmer who's just recently gotten into Zope. I've downloaded the pdf of 'The Zope Book' and looked through the various How-To's but I'm stuck on the following problem: Starting from the top.... I have a DTML Document which is essentially a simple data input form. The 'ACTION' attribute of the 'FORM' statement calls a python Script to clean up and format the data. As part of this, the Script calls a number of External Methods, all of which are written in python. I do this by using the 'container' binding (e.g. x = container.myExternalMethod()). Some of these External Methods in turn import various .py files from my personal python directory which is totally separate and apart from where Zope/Extensions lives in the filesystem. In general all this works -- I get the results I expect. My problem comes from the one External Method that imports a .py file that contains a subclassed Class. The External Method looks like this: import MySubClass def aFunction(self,a,b,c): d = MySubClass.MySubClass(a,b,c) return d MySubClass in turn looks like this: import MyClass class MySubClass(MyClass.MyClass): def __init__(self,a,b,c): """Do some initialization that differs from MyClass""" return d The External Method above dies when it tries to create 'd'. The traceback I get from Zope says: Error Type: TypeError Error Value: __init__() should return None I'm stumped by this. I think there is some sort of namespace confusion going on but I'm not sure. If anyone can shed any light on this (and save some of my hair!) I'd appreciate it. Thanks, Steve