No moudle named'lib.model.roi_crop._ext._roi_crop'and'lib.model.nms._ext.nms._nms'

[NingWang11]

When i run train_metarcnn.py,the error occered in line three.Like this
1" File "/home/wangning/progress/Few-Shot/MetaR-CNN-master/lib/model/roi_crop/_ext/roi_crop/init.py", line 3, in
from ._roi_crop import lib as _lib, ffi as _ffi
ImportError: cannot import name 'lib'
"
2' File "/home/wangning/progress/Few-Shot/MetaR-CNN-master/lib/model/nms/_ext/nms/init.py", line 3, in
from ._nms import lib as _lib, ffi as _ffi
ModuleNotFoundError: No module named 'lib.model.nms._ext.nms._nms'

I don't know where the error happened,but missing the module lib and ffi

[tooHotSpot]

Have you compiled the library? Repeat the compilation stage, please

[funny000]

i have also the problem,
ModuleNotFoundError: No module named 'nms._ext'
Can you help me solve the problem?