#写的很好
https://ptorch.com/news/145.html
conda create -n torch_0.3.1 # 创建一个新的环境
pip3 install http://download.pytorch.org/whl/cpu/torch-0.3.1-cp36-cp36m-linux_x86_64.whl
pip install torchvision==0.2.1
安装torch=0.2.1
conda create -n torch_0.2.1 # 创建一个新的环境
pip3 install http://download.pytorch.org/whl/cpu/torch-0.1.12.post2-cp36-cp36m-macosx_10_7_x86_64.whl
pip install torchvision==0.2.0