Getting Instance of calling class

[Thomas Güttler]

Hi!

I have a function called _() which prints 
strings according to the language of the user.

I don't want to give this method the object which
holds the language information every time I call it.

How can I access the calling object?

Background: This is a python product for zope.
My main object holds the prefered language of each
user. 

I found no way to get a reference to my main
object from _(). Global variables are no solution
since there could be several main objects and there
are multiple threads.

 thomas