原因是显卡用的RTX 2080Ti，CUDA就要装10以上，这个时候，请看发生了变化：
页面最下，通过选择可以看到：
pip install https://download.pytorch.org/whl/cu100/torch-1.0.1.post2-cp27-cp27mu-linux_x86_64.whl
pip install torchvision
# if the above command does not work, then you have python 2.7 UCS2, use this command
pip install https://download.pytorch.org/whl/cu100/torch-1.0.1.post2-cp27-cp27m-linux_x86_64.whl
