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Asked: 2026-05-23T09:36:32+00:00

In Python, what is the best way to compute the difference between two lists?

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In Python, what is the best way to compute the difference between two lists?

example

A = [1,2,3,4]
B = [2,5]

A - B = [1,3,4]
B - A = [5]
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1 Answer

  1. Editorial Team

    If the order does not matter, you can simply calculate the set difference:

    >>> set([1,2,3,4]) - set([2,5])
set([1, 4, 3])
>>> set([2,5]) - set([1,2,3,4])
set([5])
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