Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #34263

Re: assign only first few items of a tuple/list

Show key headers only | View raw

On 12/04/12 15:36, Chris Angelico wrote:
> On Wed, Dec 5, 2012 at 8:25 AM, Daniel Fetchinson
> <fetchinson@googlemail.com> wrote:
>> Hi folks, I swear I used to know this but can't find it anywhere.
>> Say I have a list x = [ 1,2,3,4,5 ] and only care about the first two items.
>> I'd like to assign the first two items to two variables, something like,
>>
>> a, b, _ = x
>>
>> but the above will not work, of course, but what is the common idiom
>> for this that does?
> 
> Try this:
> 
> a, b, *_ = x
> 
> Assigns 1 to a, 2 to b, and [3,4,5] to _

Just to complete the picture, that's a Py3k thing.  And it only
works with finite iterables (such as lists).  In 2.x, you have to
use Terry Reedy's slicing suggestion.

-tkc

Back to comp.lang.python | Previous | Next | Find similar | Unroll thread

Thread

Re: assign only first few items of a tuple/list Tim Chase <python.list@tim.thechases.com> - 2012-12-04 16:48 -0600

csiph-web