[Zope] Indirect calling of extensions?

[Glenn Rogers]

Imagine I have a python extension, with zope id pyFetch

  def Fetch (self, href):
    ...

I want to call this in a manner similar to:

  <!--#let call_method="'pyFetch'"-->
    <!--#in sql-method-returns-href-->
      <!--#var "_[call_method]( href )"-->
    <!--#/in-->
  <!--#/let-->

But I get an error:

  Error Type: TypeError
  Error Value: not enough arguments; expected 2, got 0

So it seems to evaluate and call the extension without adding the
parameters.  I guess I need something like lambda in python.

Can anyone help me please?


Thanks, 

Glenn