'Returns the scale factors lengthwise and breadthwise'

def __scaleFactor(self, markers):

    stdWidth = sum((596, (-60)))
    stdHeight = sum((842, (-60)))
    li = [markers[0], markers[2]]
    sf_y = (self.__distance(li) / stdHeight)
    li = [markers[6], markers[2]]
    sf_x = (self.__distance(li) / stdWidth)
    return {'x': sf_x, 'y': sf_y}
