In my conda env, my python version is 3.6.2.
I use
pip3 install http://download.pytorch.org/whl/cu90/torch-0.3.0.post4-cp36-cp36m-linux_x86_64.whl 

But there is a error.
torch-0.3.0.post4-cp36-cp36m-linux_x86_64.whl is not a supported wheel on this platform.

When I use
pip install http://download.pytorch.org/whl/cu90/torch-0.3.0.post4-cp36-cp36m-linux_x86_64.whl 

There is no error.
Can someone explain for it?Thank you.