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Thu Feb 23 22:45:19 CET 2006 · https://mail.python.org/pipermail/python-dev/2006-February/061775.html

On Wed, Feb 22, 2006 at 01:13:28PM -0800, Michael Chermside wrote:

> Haven't we learned from regrets over the .next() method of iterators
> that all "magically" invoked methods should be named using the __xxx__
> pattern? Shouldn't it be named __on_missing__() instead?

I agree that on_missing should be __missing__ (or __missing_key__) but I
don't agree on the claim that all 'magically' invoked methods should be
two-way-double-underscored. __methods__ are methods that should only be
called 'magically', or by the object itself. 'next' has quite a few usecases
where it's desireable to call it directly (and I often do.)

-- 
Thomas Wouters <thomas at xs4all.net>

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[Python-Dev] defaultdict and on_missing()