input: 
  def create_Vector3D_instance(x: float, y: float, z: float) -> Vector3D:
      """ Create an instance of Vector3D with given x, y, z values.
      >>> v1 = create_Vector3D_instance(1.0, 2.0, 3.0)
      >>> print(v1)
      (1.0, 2.0, 3.0)
      """
  
output:     return Vector3D(x, y, z)