Solved by Majedshakir in post #2 
              
              
                I got the answer. I initially install a CPU only version this only install cpuonly 1.0. When I uninstall pytorch to install the cuda pytorch it didn’t remove cpuonly 1.0. 
to fix it: 
conda uninstall pytorch

conda uninstall cpuonly

Then install pytorch again normally 
conda install pytorch torchvi…