[Python-Dev] Usage of += on strings in loops in stdlib

[Xavier Morel]

On 2013-02-13, at 12:37 , Steven D'Aprano wrote:
> 
>    # even less obvious than sum
>    map(operator.add, array)

That one does not work, it'll try to call the binary `add` with each
item of the array when the map iterator is reified, erroring out.

    functools.reduce(operator.add, array, '')

would work though, it's an other way to spell `sum` without the
string prohibition.