optimizer.py 文件源码

def _clip_dense(self, var):
        with self._maybe_colocate_with(var):
            updated_var_value = var._ref()
            normalized_var = tf.clip_by_norm(
                updated_var_value, self._max_norm, self._vars_to_clip_dims[var])
            delta = updated_var_value - normalized_var
        with tf.colocate_with(var):
            return var.assign_sub(delta, use_locking=self._use_locking)