Re: unpacking first few items of iterable

Discussion in 'Python' started by Mitya Sirenef, Dec 13, 2012.

  1. On 12/13/2012 03:39 PM, Daniel Fetchinson wrote:
    >>>>> Hi folks, I swear I used to know this but can't find it anywhere:
    >>>>>
    >>>>> What's the standard idiom for unpacking the first few items of an
    >>>>> iterable whose total length is unknown?
    >>>>>
    >>>>> Something like
    >>>>>
    >>>>> a, b, c, _ = myiterable
    >>>>>
    >>>>> where _ could eat up a variable number of items, in case I'm only
    >>>>> interested in the first 3 items?
    >>>> If you're using python3, you can simply do:
    >>>>
    >>>> a, b, c, *rest = myiterable
    >>> Thanks, sounds great, how about python2?
    >>>

    >> If you know the sequence has at least n items, you
    >> can do a, b, c = seq[:3]

    > Yeah, that's probably the simplest, without all the fancy stuff :)
    >
    > Cheers,
    > Daniel
    >
    >
    >


    Well, fancy stuff is good too, I'm a great fan of fancy stuff :)

    -m

    --
    Lark's Tongue Guide to Python: http://lightbird.net/larks/
     
    Mitya Sirenef, Dec 13, 2012
    #1
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