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intersection python Code Snippet in 2023

listbeginner

Last Updated: 2 December 2023

Returns a list of elements that exist in both lists.

  • Create a set from a and b.
  • Use the built-in set operator & to only keep values contained in both sets, then transform the set back into a list.
def intersection(a, b): _a, _b = set(a), set(b) return list(_a & _b)
intersection([1, 2, 3], [4, 3, 2]) # [2, 3]

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