sum and strings

[Fredrik Lundh]

Tim Chase wrote:

>  >>> q3 = q1 + q2
>  >>> q3.n, q3.i, q3.j, q3.k
> (8, 13, 16, 22)
>  >>> sum([q1,q2])
> Traceback (most recent call last):
>    File "<stdin>", line 1, in ?
> TypeError: unsupported operand type(s) for +: 'int' and 'q'
> 
> Just because something is slow or sub-optimal doesn't mean it 
> should be an error.

that's not an error because it would be "slow or sub-optimal" to add 
custom objects, that's an error because you don't understand how "sum" 
works.

(hint: sum != reduce)

</F>