def setUp(self):
    self.v1 = Vector2D(0, 0)
    self.v2 = Vector2D((- 1), 1)
    self.v3 = Vector2D(2.5, (- 2.5))
def setUp(self):
    self.v1 = Vector2D(0, 0)
    self.v2 = Vector2D((- 1), 1)
    self.v3 = Vector2D(2.5, (- 2.5))