code: def restore(self, sess, save_path):
          
  
          if self._saver is None:
              raise TensorForceError("register_saver_ops should be called before restore")
          self._saver.restore(sess=sess, save_path=save_path)
docs: Restores the values of the managed variables from disk location.
  
          Args:
              sess: The session for which to save the managed variables.
              save_path: The path used to save the data to.