I can't believe it, but I didn't have the last comma ({'b':'B', 'bb':'BB'}, ) and that's what was killing me .....agh BTW, I noticed you are using lists of dictionaries instead of the "standard" tuple of dictionaries. I don't know if there are any consequences to doing this. Anyway, since yours are lists you should be able to to do this: class A: _properties = [ {'a':'A', 'aa':'AA'}, ] class B(A): _properties = [ {'b':'B', 'bb':'BB'}, ] _properties.append(A._properties) not that it realy matters. Thanks, Dan Andy McKay wrote:

class A: _properties = [ {'a':'A', 'aa':'AA'}, ]

class B(A): _properties = [ {'b':'B', 'bb':'BB'}, ] _properties = _properties + A._properties

b = B() print b._properties

Works for me. -- Andy McKay, Developer, ActiveState http://www.ActiveState.com Programming for the People

----- Original Message ----- From: "Daniel Rusch" <drusch@globalcrossing.com> To: <zope@zope.org> Sent: Thursday, August 17, 2000 11:30 AM Subject: [Zope] getting base classes's (super class) _properties tuple

...

Say I have a fully functional (and more importantly, working) Product will call A.

I want to extend this Product's capabilities so I wish to derive another

class from it, call it B.

No problem,

class B(A): .........

now in class B I want to add a new property.

Is the a way of getting the base (super) class _properties tuple and just adding the new one to it. Since a tuple is an immutable object I can't do this: _properties=A._properties.append({'id':'RenderStandardHeader', 'type':'int','mode':'w'})

Any thoughts ????

DR

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So far so good, Next hurdle, at least the problems have been cut down to hurdles from walls. I have a folderish product say myFolder, in the manage_addMyFolder function I want to create an object of my product B. so I do this: def manage_addmyFolder(self, id, title='', REQUEST=None): """Add a new myFolder object with id *id*. """ ob=myFolder() ob.id=id ob.title=title self._setObject(id, ob) try: user=REQUEST['AUTHENTICATED_USER'] except: user=None ob.manage_addB(id='index_html', title='') <-- if I change this to ob.manage_addDTMLDocument(id='index_html', title='') that works ????? ....... I get the following error: AttributeError: manage_addB Any thoughts, DR

Yeah, that's what i thought, but I know it exists cause I can create an object of type B and I copied and pasted the manage_addB part????? For any one else who is reading this: the problem is: I have a product I'll call B. Additionally I have a folderish product I'll call myFolder. What I want to do is when I create a folderish object (a myFolder) in it I want an object B, very similar to when a folder is created you can have a DTMLMethod created. And here is the rub, I am able to have my folderish object create a DTMLMethod instead of an object B. Any thoughts, Dan Andy McKay wrote:

Not to sure there Im afraid. The obvious answer is the manage_addB doesnt exist whereas manage_addDTMLDocument does.

-- Andy McKay, Developer, ActiveState http://www.ActiveState.com Programming for the People

----- Original Message ----- From: "Daniel Rusch" <drusch@globalcrossing.com> To: "Daniel Rusch" <drusch@globalcrossing.com>; <zope@zope.org> Sent: Thursday, August 17, 2000 1:39 PM Subject: [Zope] Creating an object from within another

...

So far so good,

Next hurdle, at least the problems have been cut down to hurdles from walls.

I have a folderish product say myFolder, in the manage_addMyFolder function I want to create an object of my product B. so I do this:

def manage_addmyFolder(self, id, title='', REQUEST=None): """Add a new myFolder object with id *id*. """ ob=myFolder() ob.id=id ob.title=title self._setObject(id, ob) try: user=REQUEST['AUTHENTICATED_USER'] except: user=None ob.manage_addB(id='index_html', title='') <-- if I change this to ob.manage_addDTMLDocument(id='index_html', title='') that works ????? .......

I get the following error:

AttributeError: manage_addB

Any thoughts,

DR

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