[Python-3000] PEP 3132: Extended Iterable Unpacking

[Georg Brandl]

Simon Percivall schrieb:
> On 2 maj 2007, at 20.08, Guido van Rossum wrote:
>> [Georg]
>>>>>>>> a, *b, c = range(5)
>>>>>>>> a
>>>>>     0
>>>>>>>> c
>>>>>     4
>>>>>>>> b
>>>>>     [1, 2, 3]
>>
>> <snip>
>> That sounds messy; only allowing *a at the end seems a bit more
>> manageable. But I'll hold off until I can shoot holes in your
>> implementation. ;-)
> 
> As the patch works right now, any iterator will be exhausted,
> but if the proposal is constrained to only allowing the *name at
> the end, wouldn't a more useful behavior be to not exhaust the
> iterator, making it similar to:
> 
>  > it = iter(range(10))
>  > a = next(it)
>  > b = it
> 
> or would this be too surprising?

IMO yes.

Georg

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