直接使用conda安装报错：
(CenterNet) C:\Users\16323>conda install pytorch==1.4.0 torchvision==0.5.0 cudatoolkit=10.1 -c pytorch -c conda-forge
Channels:
- pytorch
- conda-forge
- defaults
Platform: win-64
Collecting package metadata (repodata.json): done
Solving environment: failed
PackagesNotFoundError: The following packages are not available from current channels:
- torchvision==0.5.0
Current channels:
- https://conda.anaconda.org/pytorch
- https://conda.anaconda.org/conda-forge
- https://repo.anaconda.com/pkgs/main
- https://repo.anaconda.com/pkgs/r
- https://repo.anaconda.com/pkgs/msys2
To search for alternate channels that may provide the conda package you're
looking for, navigate to
https://anaconda.org
and use the search bar at the top of the page.使用pip直接安装，报错：
(CenterNet) C:\Users\16323>pip install torch==1.4.0 torchvision==0.5.0
ERROR: Could not find a version that satisfies the requirement torch==1.4.0 (from versions: 1.7.0, 1.7.1, 1.8.0, 1.8.1, 1.9.0, 1.9.1, 1.10.0, 1.10.1, 1.10.2)
ERROR: No matching distribution found for torch==1.4.0使用 PyTorch 官方下载源：
pip install torch==1.4.0 torchvision==0.5.0 -f https://download.pytorch.org/whl/torch_stable.html