[Zope] PDF from external method

[Juergen R. Plasser / HEXAGON]

--On Mittwoch, 24. Oktober 2001 13:21 -0400 Brad Clements 
<bkc@murkworks.com> wrote:

> Easy, our external method just gets the output from reportlab in a string
> like object, then  writes the data to RESPONSE.
>
>
>  def externalmethod(self,REQUEST,RESPONSE, ... other stuff):
>  <snip>

How do I define this external method in Zope, or how can I call the 
external method with the 3 parameters? (sorry newbie).

When I declare an external method like this:

Id       test
Title    Testmethod
Module	 testmodule
Function externalmethod(self,REQUEST,RESPONSE)

I receive the following error:

Error Type: TypeError
Error Value: externalmethod() takes exactly 3 arguments (0 given)

Is there any good summary where I can get some more info about external 
methods?

Juergen