问题描述

在使用apex的过程中，出现了如下问题：

  File "/home/shuyuan/yolov5-master/./fast_reid/fastreid/engine/train_loop.py", line 14, in <module>
    from apex import amp
  File "/home/shuyuan/anaconda3/envs/shuyuan/lib/python3.8/site-packages/apex/__init__.py", line 7, in <module>
    from . import amp
  File "/home/shuyuan/anaconda3/envs/shuyuan/lib/python3.8/site-packages/apex/amp/__init__.py", line 1, in <module>
    from .amp import init, half_function, float_function, promote_function,\
  File "/home/shuyuan/anaconda3/envs/shuyuan/lib/python3.8/site-packages/apex/amp/amp.py", line 1, in <module>
    from . import compat, rnn_compat, utils, wrap
  File "/home/shuyuan/anaconda3/envs/shuyuan/lib/python3.8/site-packages/apex/amp/rnn_compat.py", line 1, in <module>
    from . import utils, wrap
  File "/home/shuyuan/anaconda3/envs/shuyuan/lib/python3.8/site-packages/apex/amp/wrap.py", line 3, in <module>
    from ._amp_state import _amp_state
  File "/home/shuyuan/anaconda3/envs/shuyuan/lib/python3.8/site-packages/apex/amp/_amp_state.py", line 14, in <module>
    from torch._six import container_abcs
ImportError: cannot import name 'container_abcs' from 'torch._six' (/home/shuyuan/anaconda3/envs/shuyuan/lib/python3.8/site-packages/torch/_six.py)

解决方法

找到问题所在的文件，将这部分的代码用下面的代码替换

if TORCH_MAJOR == 1 and TORCH_MINOR < 8:
    from torch._six import container_abcs
else:
    import collections.abc as container_abcs