【Python pytorch问题】安装torch

1. 安装torch_scatter出现没有这个模块，所以就安装了一下这个模块

pip install torch_scatter

结果一路飘红，出现以下错误：

running bdist_wheel
  running build
  running build_py
  creating build
  creating buildlib.win-amd64-3.7
  creating buildlib.win-amd64-3.7torch_scatter
  copying torch_scatterplaceholder.py -> buildlib.win-amd64-3.7torch_scatter
  copying torch_scatterscatter.py -> buildlib.win-amd64-3.7torch_scatter
  copying torch_scattersegment_coo.py -> buildlib.win-amd64-3.7torch_scatter
  copying torch_scattersegment_csr.py -> buildlib.win-amd64-3.7torch_scatter
  copying torch_scatterutils.py -> buildlib.win-amd64-3.7torch_scatter
  copying torch_scatter__init__.py -> buildlib.win-amd64-3.7torch_scatter
  creating buildlib.win-amd64-3.7torch_scattercomposite
  copying torch_scattercompositelogsumexp.py -> buildlib.win-amd64-3.7torch_scattercomposite
  copying torch_scattercompositesoftmax.py -> buildlib.win-amd64-3.7torch_scattercomposite
  copying torch_scattercompositestd.py -> buildlib.win-amd64-3.7torch_scattercomposite
  copying torch_scattercomposite__init__.py -> buildlib.win-amd64-3.7torch_scattercomposite
  running build_ext
  D:Anaconda3envsrecbolelibsite-packagestorchutilscpp_extension.py:322: UserWarning: Error checking compiler version for cl: [WinError 2] 绯荤粺鎵句笉鍒版寚瀹氱殑鏂囦欢
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    warnings.warn(f'Error checking compiler version for {compiler}: {error}')
  D:Anaconda3envsrecbolelibsite-packagestorchutilscpp_extension.py:788: UserWarning: The detected CUDA version (11.5) has a minor version mismatch with the version that was used to compile PyTorch (11.3). Most likely this shouldn't be a problem.
    warnings.warn(CUDA_MISMATCH_WARN.format(cuda_str_version, torch.version.cuda))
  building 'torch_scatter._scatter_cpu' extension
  error: Microsoft Visual C++ 14.0 or greater is required. Get it with "Microsoft C++ Build Tools": https://visualstudio.microsoft.com/visual-cpp-build-tools/
  ----------------------------------------
  ERROR: Failed building wheel for torch-scatter

看了一篇这篇博文（有兴趣的可以点击），说是最后一句，缺少c++编译，应该下载一个，所以就在vscode里面安装了c++的插件，但是还是未解决
2. 出现以下错误，说当前这个channel有问题，要去anconda官网寻找一个可以用的，结果按照这个博文去寻找，照着语句安装也未解决。
3. 最后在Gitbub中下载安装torch_scatter,命令为
https://github.com/rusty1s/pytorch_scatter

conda install pytorch-scatter -c pyg

解决了问题，成功安装torch_scatter