input: 
  class Vector3D:
      def __init__(self, x, y, z):
          self.x = x
          self.y = y
          self.z = z
      
      def __str__(self):
          return "(" + str(self.x) + ", " + str(self.y) + ", " + str(self.z) + ")"
  
  def create_vector(x: float, y: float, z: float) -> Vector3D:
      """ Create and return a 3D Vector object from the given x, y, and z coordinates.
      >>> create_vector(1.0, 2.0, 3.0)
      (1.0, 2.0, 3.0)
      >>> create_vector(0.0, -1.0, 0.0)
      (0.0, -1.0, 0.0)
      """
      return Vector3D(x, y, z)
  
output:     
      return Vector3D(x, y, z)
  