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Sat Aug 9 20:02:58 CEST 2014 · https://mail.python.org/pipermail/python-dev/2014-August/135699.html

On Sat, Aug 9, 2014 at 3:08 AM, Stephen J. Turnbull <stephen at xemacs.org>
wrote:

> All the suggestions
> I've seen so far are (IMHO, YMMV) just as ugly as the present
> situation.
>

What is ugly about allowing strings?  CPython certainly has a way to to
make sum(x, '') at least as efficient as y='';for in in x; y+= x is now.
 What is ugly about making sum([a, b, ..]) be equivalent to a + b + .. so
that non-empty lists of arbitrary types can be "summed"?  What is ugly
about harmonizing sum(x) and reduce(operator.add, x) behaviors?
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[Python-Dev] sum(...) limitation