List symmetric difference
Python, List · Nov 2, 2020
Returns the symmetric difference between two iterables, without filtering out duplicate values.
- Create a
setfrom each list.
- Use a list comprehension on each of them to only keep values not contained in the previously created set of the other.
def symmetric_difference(a, b): (_a, _b) = (set(a), set(b)) return [item for item in a if item not in _b] + [item for item in b if item not in _a]
symmetric_difference([1, 2, 3], [1, 2, 4]) # [3, 4]