def METHOD_NAME(self):
    self.v1 = Vector3D(1, 2, 3, "v1")
    self.v2 = Vector3D(3, 4, 5, "v2")
    self.v3 = Vector3D(1.00000001, 2.00000001, 3.00000001)
    self.v4 = Vector3D(2, 3, 4)
    self.v = Vector3D(1, 2, 3, "v1 bis")
    self.point1 = Point3D(2, 3, 4)
    self.point2 = Point3D(1, 2, 2)