* remove multibuf * reward_metric * make fileds with empty Batch rather than None after reset * many fixes and refactor Co-authored-by: Trinkle23897 <463003665@qq.com>
* remove multibuf * reward_metric * make fileds with empty Batch rather than None after reset * many fixes and refactor Co-authored-by: Trinkle23897 <463003665@qq.com>