code: def scale(self, s=None):
          
          if s is None:
              return np.array(self.GetScale())
          self.SetScale(s)
          return self
docs: Set/get actor's scaling factor.
  
          :param s: scaling factor(s).
          :type s: float, list
  
          .. note:: if `s==(sx,sy,sz)` scale differently in the three coordinates.