multimethods decorator

[Gerardo Herzig]

Hi all. Im reading the Gido's aproach using decorators at
http://www.artima.com/weblogs/viewpost.jsp?thread=101605

It looks good to me, but the examples shows the functionality using 
functions.
Now, when i try to give this decorator into a method, if i try the

class test(object):
    @multimethod(...)
    def met(self, ...):

The multimethod decorator needs the types of the arguments, and, if the 
met method requires self as the first argument, the multimethod should 
look like
@multimethod(self.__class__, bla, ble) or some like that...

Now i know that im wrong, because i have this error
 >@multimethod(self.__class__)
 >NameError: name 'self' is not defined

So what would be the first argument to @multimethod??

Thanks!!
Gerardo