[Python-ideas] Generator unpacking

[Ethan Furman]

On 02/17/2016 05:58 AM, Chris Angelico wrote:
> On Wed, Feb 17, 2016 at 4:54 AM, Georg Brandl <g.brandl at gmx.net> wrote:
>>> Another aspect, I came to think of is the following asymmetry:
>>>
>>> a, b, c, d = mylist4 # works
>>> a, b, c = mylist3    # also works
>>> a, b = mylist2       # works too
>>> [a] = mylist1        # special case?
>>
>> a, = mylist1
>>
>> actually.  Same "special case" as with 1-element tuples.
>
> The one-target case is actually available to everything else; the only
> difference is that the trailing comma is mandatory, not optional:
>
>>>> a,b,c, = range(3)
>
> Which is, again, the same as with tuples.

Did you mean the trailing comma is necessary in the one-tuple case?

--> a, b, c = range(3)
--> a
0
--> b
1
--> c
2

--> a = range(1)
--> a
[0]
--> a, = range(1)
--> a
0

--
~Ethan~