Why read-only nested scopes?

[Skip Montanaro]

    Gonçalo> So why hasn't this been extended when nested scopes were
    Gonçalo> introduced, e.g. by reusing the global directive or some other
    Gonçalo> one?

    Martin> I think the main reason is that nobody could propose an
    Martin> acceptable syntax. Reusing the global directive does not work.

For the gory details, read PEP 227:

    http://www.python.org/peps/pep-0227.html

especially the section entitled "Rebinding names in enclosing scopes".

-- 
Skip Montanaro
skip at pobox.com
consulting: http://manatee.mojam.com/~skip/resume.html