[Python-ideas] Fwd: Iterable unpacking within containers

[Michele Lacchia]

Well, honestly the * syntax is a lot more readable and immediate to
understand,
given the fact the it is already used in function arguments.


On Mon, Jun 24, 2013 at 1:51 PM, Jonathan Slenders <jonathan at slenders.be>wrote:

> What about:
>
> >>> y = [-2] + list((-1, 0)) + list(x) + [4, 5]
>
> or itertools.chain?
>
>
>
>
> 2013/6/24 SpaghettiToastBook . <spaghettitoastbook at gmail.com>
>
> I think it would be very convenient if the * syntax was extended to
>> allow unpacking iterables inside containers. For example:
>>
>> >>> x = range(1, 4)
>> >>> y = [-2, *(-1, 0), *x, 4, 5]
>> >>> print(y)
>> [-2, -1, 0, 1, 2, 3, 4, 5]
>>
>> This would be especially convenient if two lists needed to be
>> combined, but one list's contents needed to be the the middle of the
>> other one. I don't think any code would break because the suggested
>> syntax currently raises a SyntaxError.
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-- 
Michele Lacchia
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