Find intersection of two nested lists?

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星月不相逢
星月不相逢 2020-11-22 04:16

I know how to get an intersection of two flat lists:

b1 = [1,2,3,4,5,9,11,15]
b2 = [4,5,6,7,8]
b3 = [val for val in b1 if val in b2]

or

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  • 2020-11-22 05:12
    c1 = [1, 6, 7, 10, 13, 28, 32, 41, 58, 63]
    c2 = [[13, 17, 18, 21, 32], [7, 11, 13, 14, 28], [1, 5, 6, 8, 15, 16]]
    c3 = [list(set(i) & set(c1)) for i in c2]
    c3
    [[32, 13], [28, 13, 7], [1, 6]]
    

    For me this is very elegant and quick way to to it :)

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  • 2020-11-22 05:13

    A pythonic way of taking the intersection of 2 lists is:

    [x for x in list1 if x in list2]
    
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