[Python-ideas] Fast sum() for non-numbers

[Juancarlo Añez]

On Thu, Jul 4, 2013 at 5:31 AM, Haoyi Li <haoyi.sg at gmail.com> wrote:

> Random thought: this kind of "different implementations for different
> types" seems exactly what PEP443 (http://www.python.org/dev/peps/pep-0443/)
> is about; it would save you having the nasty big chunk of if-elses within
> sum() itself, and would let other people incrementally implement special
> sums for their own special data types without having to muck with the std
> lib code.
>

Exactly. Though 443 allows dispatching only on simple type names. Python
doesn't have the concept of list<int>, or list<list>.


-- 
Juancarlo *Añez*
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