参考:
https://www.mindspore.cn/tutorials/en/r1.3/save_load_model.html
https://github.com/mindspore-lab/mindcv/blob/main/docs/zh/tutorials/finetune.md
import os
from mindcv.utils.download import DownLoad
import os
import mindspore as ms
os.environ['DEVICE_ID']='0'
ms.set_context(mode=ms.GRAPH_MODE, device_target