def list_diff(l1,l2):
    sl2 = set(l2) 
    return [s for s in l1 if s not in sl2]
Given a list of items::
dataset/ETHPy150Open Microsoft/ivy/src/ivy/ivy_utils.py/list_diff--crossover with--dataset/ETHPy150Open saltstack/salt/salt/renderers/stateconf.py/nvlist