old_contents: class Rover:
  
      compass = ['N', 'E', 'S', 'W']
  
      def __init__(self, x=0, y=0, direction='N'):
          self.x = x
          self.y = y
          self.direction = direction
  
      @property
      def position(self):
          return self.x, self.y, self.direction
  
new_contents: class Rover:
  
      compass = ['N', 'E', 'S', 'W']
  
      def __init__(self, x=0, y=0, direction='N'):
          self.x = x
          self.y = y
          self.direction = direction
  
      @property
      def position(self):
          return self.x, self.y, self.direction
  
      def set_position(self, x, y, direction):
          self.x = x
          self.y = y
          self.direction = direction
  
subject: Add set_position method to Rover