code: def fullname(self):
          
          by_object = self.reddit_session.config.by_object
          return '{0}_{1}'.format(by_object[self.__class__], self.id)
docs: Return the object's fullname.
  
          A fullname is an object's kind mapping like `t3` followed by an
          underscore and the object's base36 id, e.g., `t1_c5s96e0`.