Can "simple" (single level of nesting) decorators, to be used with 
Python <2.4 compatible syntax, be done using add_assignment_advisor?
   def deco(func):
     def call(*args, **kw):
       ...
     return call
   [deco]
   def foo(x,y):
   ...
or there needs to be a call made inside [] for it to work?
Thanks!
Cheers,
Simon