[Tutor] Unpack from list

[Mark Lawrence]

On 13/07/2015 13:03, Sunil Tech wrote:
> Hi Tutor,
>
>
> [a,b,c] = [1,2]
> this will give
> Traceback (most recent call last):
>    File "<stdin>", line 1, in <module>
> ValueError: need more than 2 values to unpack
>
> But is there any chance, if there are 3 values on left hand side and 2
> values on right side, to add an empty value to the left side dynamically?
>

You need "Extended Iterable Unpacking" as described in 
https://www.python.org/dev/peps/pep-3132/

<quote>
An example says more than a thousand words:
 >>> a, *b, c = range(5)
 >>> a
0
 >>> c
4
 >>> b
[1, 2, 3]
<quote>

Hence:-

 >>> a,b,*c=[1,2]
 >>> a,b,c
(1, 2, [])

-- 
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.

Mark Lawrence