def take_away(y):
    """take_away(y)(x) = x - y

    Be careful with this because subtraction is not commutative.
    The flipped version of this is 'take_away_from'

    >>> list(map(take_away(2), [1,2,3,4,5]))
    [-1, 0, 1, 2, 3]
    """
    return lambda x: x - y
