[Python-Dev] Not backporting PEP 3115 (metaclass __prepare__)

Guido van Rossum guido at python.org
Fri Mar 21 07:31:49 CET 2008


On Tue, Mar 18, 2008 at 10:14 PM, Jack Diederich <jackdied at jackdied.com> wrote:
> We can't backport the __prepare__ syntax without requiring metaclass
> definition on the 'class' line. Because the __metaclass__ definition
> can be at the end of the class in 2.6 we can't find it until after we
> execute the class and that is too late to use a custom dictionary.

That's fine. We need some carrots to encourage people to upgrade too. :-)
> I wish I had thought of that yesterday,

Me too...
-- 
--Guido van Rossum (home page: http://www.python.org/~guido/)


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