No module named 'krahenbuhl2013.wrapper'

ubuntu@fadfd17f190d:~/user_space/SGAN$ CUDA_VISIBLE_DEVICES=0 python tools/stage2/train_sgan.py  --cfg_file config/sgan_vgg16_321x321.yml
Traceback (most recent call last):
  File "tools/stage2/train_sgan.py", line 11, in <module>
    from lib.dataset.get_dataset import get_dataset
  File "/home/ubuntu/user_space/SGAN/tools/stage2/../../lib/dataset/get_dataset.py", line 4, in <module>
    from lib.dataset import voc12_sgan
  File "/home/ubuntu/user_space/SGAN/tools/stage2/../../lib/dataset/voc12_sgan.py", line 15, in <module>
    from lib.dataset import imutils
  File "/home/ubuntu/user_space/SGAN/tools/stage2/../../lib/dataset/imutils.py", line 11, in <module>
    import krahenbuhl2013
  File "/home/ubuntu/MyFiles/.local/lib/python3.5/site-packages/krahenbuhl2013/__init__.py", line 1, in <module>
    from .CRF import *
  File "/home/ubuntu/MyFiles/.local/lib/python3.5/site-packages/krahenbuhl2013/CRF.py", line 1, in <module>
    from krahenbuhl2013.wrapper import DenseCRF
ImportError: No module named 'krahenbuhl2013.wrapper'

Cython版本问题；原来系统安装了Cython==0.29.1；但是CRF要求。所以要换版本

pip install Cython==0.24.1

然后，重新编译CRF，切记：不要乱改代码内容。