old_contents: import os
  
  import pygame
  
  
  class Mentor(pygame.sprite.Sprite):
      def __init__(self, location, *groups):
          super(Mentor, self).__init__(*groups)
          self.image = pygame.image.load(os.path.join('img', 'mentor.png'))
          self.rect = pygame.rect.Rect(location, self.image.get_size())
  
      def update(self):
          pass
  
new_contents: from characters import BaseCharacer
  
  
  class Mentor(BaseCharacer):
      def __init__(self, location, *groups):
          super(Mentor, self).__init__(location, *groups)
  
      def update(self):
          pass
  
subject: Fix mentors