difference python Code Snippet in 2025
listbeginner
Last Updated: 6 November 2025
Calculates the difference between two iterables, without filtering duplicate values.
- Create a
setfromb. - Use a list comprehension on
ato only keep values not contained in the previously created set,_b.
def difference(a, b): _b = set(b) return [item for item in a if item not in _b]
difference([1, 2, 3], [1, 2, 4]) # [3]
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