Question about exausted iterators

[Christophe]

Fredrik Lundh a écrit :
> Christophe wrote:
> 
>>>> Because I'm still waiting for a valid answer to my question. The 
>>>> answer "Because it has been coded like that" or is not a valid one.
>>>
>>>
>>> it's been coded like that because that's what the specification says:
>>>
>>>     http://www.python.org/dev/peps/pep-0234/
>>
>>
>> I didn't though I had to mention that "Because the spec has been 
>> writen like that" wasn't a valid answer either.
> 
> 
> so what is a valid answer?

Some valid use case for that behaviour, some example of why what I ask 
could cause problems, some implementation difficulties etc ...

Saying it's like that because someone said so isn't exactly what I was 
expecting as an answer :) People sometimes can be wrong you know.