解决：lietorch_backends.cpython-310-x86_64-linux-gnu.so: undefined symbol: _ZNK3c107SymBool10guard_bool

运行python -c "import torch; import lietorch; import simple_knn; import diff_gaussian_rasterization; print(torch.cuda.is_available())
出现

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/xxx/Splat-SLAM/thirdparty/lietorch/lietorch/__init__.py", line 2, in <module>
    from .groups import LieGroupParameter, SO3, RxSO3, SE3, Sim3, cat, stack
  File "/home/xxx/Splat-SLAM/thirdparty/lietorch/lietorch/groups.py", line 5, in <module>
    from .group_ops import Exp, Log, Inv, Mul, Adj, AdjT, Jinv, Act3, Act4, ToMatrix, ToVec, FromVec
  File "/home/xxx/Splat-SLAM/thirdparty/lietorch/lietorch/group_ops.py", line 1, in <module>
    import lietorch_backends
ImportError: /home/xxx/anaconda3/envs/dpvo/lib/python3.10/site-packages/lietorch_backends.cpython-310-x86_64-linux-gnu.so: undefined symbol: _ZNK3c107SymBool10guard_boolEPKcl

解决这个问题
这个问题主要是环境错乱引起的， 可以看出splat和dpvo都出现了
解决：
echo $PYTHONPATH
发现有好多环境：
/home/xxx/anaconda3/envs/splat/lib/python3.10/site-packages:/home/xxx/catkin_ws/devel/lib/python3/dist-packages:/opt/ros/noetic/lib/python3/dist-packages:/home/xxx/anaconda3/envs/splat/lib/python3.10/site-packages:/home/xxx/anaconda3/envs/splat-slam/lib/python3.10/site-packages:/home/xxx/anaconda3/envs/splat-slam/lib/python3.10/site-packages:/home/xxx/anaconda3/envs/dpvo/lib/python3.10/site-packages:/home/xxx/anaconda3/envs/MonoGS/lib/python3.7/site-packages

直接unset PYTHONPATH