code: def contains(self, point):
      
      return (
            point[0] >= self.minpt[0] 
        and point[1] >= self.minpt[1]
        and point[2] >= self.minpt[2] 
        and point[0] <= self.maxpt[0] 
        and point[1] <= self.maxpt[1]
        and point[2] <= self.maxpt[2]
      )
docs: Tests if a point on or within a bounding box.
  
      Returns: boolean