def dist(a, b):
    return sum((i-j)**2 for i, j in zip(a, b))
def test_between_or_equal_to():
    """Greater than or equal to y and less than or equal to z."""
    p = are.between_or_equal_to(3, 3)
    ps = [p(x) for x in range(1, 6)]
    assert ps == [False, False, True, False, False]