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

[Steven D'Aprano]

On 13/02/13 22:46, Xavier Morel wrote:
> 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.

Oops, you are right of course, I was thinking reduce but it came out map.
Thanks for the correction.


-- 
Steven