def intersection_by(a, b, fn): _b = set(map(fn, b)) return [item for item in a if fn(item) in _b] from math import floor intersection_by([2.1, 1.2], [2.3, 3.4], floor) # [2.1]
def intersection_by(a, b, fn): _b = set(map(fn, b)) return [item for item in a if fn(item) in _b] from math import floor intersection_by([2.1, 1.2], [2.3, 3.4], floor) # [2.1]