old_contents: import json
  import hunting.sim.entities as entities
  
  
  class GameObjectEncoder(json.JSONEncoder):
      def default(self, o):
          d = o.__dict__
          d.pop('owner', None)
  
          if isinstance(o, entities.GameObject):
              d.pop('log', None)
              d.pop('ai', None)
              return d
          elif isinstance(o, entities.Fighter):
              d.pop('death_function')
              return d
          elif isinstance(o, entities.ChangeableProperty):
              return {k: o.__dict__[k] for k in ['property_type', 'base']}
          else:
              return d
  
  
  def encode_level(level):
      save_factions = [f for f in level.get_factions() if level.get_faction_info(f)['save'] is True]
      factions_to_objects = {f: level.get_objects_inside_faction(f) for f in save_factions}
      return json.dumps(factions_to_objects, cls=GameObjectEncoder, indent=2)
  
new_contents: import json
  import hunting.sim.entities as entities
  
  
  class GameObjectEncoder(json.JSONEncoder):
      def default(self, o):
          d = o.__dict__
          d.pop('owner', None)
  
          if isinstance(o, entities.GameObject):
              d.pop('log', None)
              d.pop('ai', None)
              return d
          elif isinstance(o, entities.Fighter):
              d.pop('death_function')
              return d
          elif isinstance(o, entities.ChangeableProperty):
              return {k: o.__dict__[k] for k in ['property_type', 'base']}
          else:
              return d
  
  
  def encode_level(level):
      save_factions = {f: level.get_faction_info(f) for f in level.get_factions()
                       if level.get_faction_info(f)['save'] is True}
  
      for f in save_factions:
          save_factions[f]['objects'] = level.get_objects_inside_faction(f)
  
      output = {'log': level.log.events,
                'factions': save_factions}
  
      return json.dumps(output, cls=GameObjectEncoder, indent=2)
  
subject: Add log to encoding output (still fails due to objects)