sum and strings

[Fredrik Lundh]

Paddy wrote:

> Here is where I see the break in the 'flow':
> 
>>>> 1+2+3
> 6
>>>> sum([1,2,3], 0)
> 6
>>>> [1] + [2] +[3]
> [1, 2, 3]
>>>> sum([[1],[2],[3]], [])
> [1, 2, 3]
>>>> '1' + '2' + '3'
> '123'
>>>> sum(['1','2','3'], '')
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
> TypeError: sum() can't sum strings [use ''.join(seq) instead]

do you often write programs that "sums" various kinds of data types, and 
for which performance issues are irrelevant?

or are you just stuck in a "I have this idea" loop?

</F>