code: def get_created_by(self):
          '''Returns created by'''
          created_by = parsers.get_created_by(self.__chebi_id)
  
          if created_by is None:
              created_by = parsers.get_created_by(self.get_parent_id())
  
          if created_by is None:
              for parent_or_child_id in self.__get_all_ids():
                  created_by = parsers.get_created_by(parent_or_child_id)
  
                  if created_by is not None:
                      break
  
          return created_bf get_created_by(self):
          '''Returns created by'''
          created_by = parsers.get_created_by(self.__chebi_id)
  
          if created_by is None:
              created_by = parsers.get_created_by(self.get_parent_id())
  
          if created_by is None:
              for parent_or_child_id in self.__get_all_ids():
                  created_by = parsers.get_created_by(parent_or_child_id)
  
                  if created_by is not None:
                      break
  
          return created_by
docs: Returns created by