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Home/ Questions/Q 6765097
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Editorial Team
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Editorial Team
Asked: May 26, 20262026-05-26T14:40:20+00:00 2026-05-26T14:40:20+00:00

In Python, is there a good way to interleave two lists of the same

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In Python, is there a good way to interleave two lists of the same length?

Say I’m given [1,2,3] and [10,20,30]. I’d like to transform those into [1,10,2,20,3,30].

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  1. Editorial Team
    Editorial Team
    2026-05-26T14:40:20+00:00Added an answer on May 26, 2026 at 2:40 pm

    Having posted the question, I’ve realised that I can simply do the following:

    [val for pair in zip(l1, l2) for val in pair]
    

    where l1 and l2 are the two lists.


    If there are N lists to interleave, then

    lists = [l1, l2, ...]
    [val for tup in zip(*lists) for val in tup]
    
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