passing by refference

[Aahz]

In article <87znlng7cf.fsf at charter.net>,
Doug Quale  <quale1 at charter.net> wrote:
>
>If you don't agree that this describes call-by-value argument passing,
>tell us what Python does differently.  Be very specific.

All right, you explain this:

>>> x = 'foo'
>>> '%s' % (x,)

What gets printed by the %s?
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"In many ways, it's a dull language, borrowing solid old concepts from
many other languages & styles:  boring syntax, unsurprising semantics,
few automatic coercions, etc etc.  But that's one of the things I like
about it."  --Tim Peters on Python, 16 Sep 93