-----Original Message----- From: Martijn Faassen [mailto:m.faassen@vet.uu.nl] Sent: Wednesday, September 08, 1999 11:45 AM To: zope-dev@zope.org Subject: [Zope-dev] Can't get ZClass baseclass to behave as DTML Method

Hi there again,

Python and DTML Methods, one way or another they seem to be the theme for me today..

A couple of weeks ago I asked the same question (I encountered it in different circumstances). I'm trying to create a ZClass (deriving from a Python base class) that behaves like a DTML _method_.

To this purpose, I tried to define this __call__:

def __call__(self, client, REQUEST=None): "Call this ZClass as a DTML method." return self.render(client, REQUEST)

in the base class that is inherited by a ZClass.

If I grok the answers I got today by Martijn Pieters and Evan Simpson right, the arguments mean the following:

self - the instance of this ZClass client - the object we're calling this method on (in my case an XML node) REQUEST - the regular request object

the 'render' function figures out how to display the node (client) and returns the resulting string.

This is however not working -- if I call an instance 'foo' like this on an XML node, like this:

xmldoc/e7/e14/foo

instead it'll display index_html (that is acquired and not defined on the ZClass). It apparently isn't calling __call__ at all.

It doesn't call *your* __call__ or it raises an exception? It might be calling a __call__ method defined in a Base class that supercedes the one you define. -Michel