dome运行失败，1808MO需要安装什么库

toybrick@debian10:~$ cd /opt/1808/
toybrick@debian10:/opt/1808$ ls
boot.sh  rknn_server_class.py  yolov3_server.py  yolov3_tiny.rknn
toybrick@debian10:/opt/1808$ python3 yolov3_server.py
Traceback (most recent call last):
  File "yolov3_server.py", line 3, in <module>
    from rknn.api import RKNN
ModuleNotFoundError: No module named 'rknn'