Re: unpacking first few items of iterable

Discussion in 'Python' started by Daniel Fetchinson, Dec 13, 2012.

  1. >>>> 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



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    Daniel Fetchinson, Dec 13, 2012
    #1
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