ImportError: /home/yukang/anaconda3/envs/fsgan/lib/python3.9/site-packages/torch/lib/libtorch_cuda_c_undefined symbol: cudagraphretainuserobject, versi

问题描述：

Traceback (most recent call last):
  File "/data/dev/projects/fsgan/download_fsgan_models.py", line 8, in <module>
    from fsgan.utils.utils import download_from_url
  File "/data/dev/projects/fsgan/fsgan/utils/utils.py", line 6, in <module>
    import torch
  File "/home/yukang/anaconda3/envs/fsgan/lib/python3.9/site-packages/torch/__init__.py", line 192, in <module>
    from torch._C import *  # noqa: F403
ImportError: /home/yukang/anaconda3/envs/fsgan/lib/python3.9/site-packages/torch/lib/libtorch_cuda_cpp.so: undefined symbol: cudaGraphRetainUserObject, version libcudart.so.11.0
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解题思路一：

问题是因为 anaconda 的人写了一些错误的包装。

conda uninstall pytorch
conda uninstall libtorch
pip uninstall torch
pip uninstall torch # yes twice
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然后现在使用 pytorch.org 中的命令全新安装 pytorch

不是(conda install pytorch)而是下面的指令。
conda install pytorch cuda80 -c soumith
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$已解决。$

参考链接：https://github.com/pytorch/pytorch/issues/2091

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