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Tue Mar 15 13:41:33 CET 2005 · https://mail.python.org/pipermail/python-dev/2005-March/052191.html

On Tuesday 2005-03-15 01:57, Guido van Rossum wrote:
> I think the conclusion should be that sum() is sufficiently
> constrained by backwards compatibility to make "fixing" it impossible
> before 3.0. But in 3.0 I'd like to fix it so that the 2nd argument is
> only used for empty lists.

Why's that better than having the 2nd argument only *needed*
for empty lists, but *used* whenever it's given?

-- 
g

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[Python-Dev] Rationale for sum()'s design?