zip()to add elements to groups, based on
filterhas a truthy value for any element, add it to the first group, otherwise add it to the second group.
def bifurcate(lst, filter): return [ [x for x, flag in zip(lst, filter) if flag], [x for x, flag in zip(lst, filter) if not flag] ]
bifurcate(['beep', 'boop', 'foo', 'bar'], [True, True, False, True]) # [ ['beep', 'boop', 'bar'], ['foo'] ]
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