ModuleNotFoundError: No module named ‘projects‘

Traceback (most recent call last):
  File "tools/train.py", line 41, in <module>
    from ..projects.CenterNet2.centernet.config import add_centernet_config
ImportError: attempted relative import with no known parent package
(detectron2) lvying@ps:~/CenterNet2$ CUDA_VISIVLE_DEVICES=1 python tools/train.py
Traceback (most recent call last):
  File "tools/train.py", line 41, in <module>
    from .projects.CenterNet2.centernet.config import add_centernet_config
ImportError: attempted relative import with no known parent package
(detectron2) lvying@ps:~/CenterNet2$ CUDA_VISIVLE_DEVICES=1 python tools/train.py
Traceback (most recent call last):
  File "tools/train.py", line 41, in <module>
    from projects.CenterNet2.centernet.config import add_centernet_config
ModuleNotFoundError: No module named 'projects'

解决办法：一：使用sys.paht.append(‘你想导入的模块的上一级路径即可’)