Hello @partho. Thanks for your return. Could you confirm that the following code is correct in order to uninstall pytorch, install the pytorch version 1.0.0 and keep installed fastai and torchvision ?
conda uninstall pytorch --force
conda install pytorch=1.0.0
[ EDIT ] I tested and it works great! With conda uninstall pytorch --force, no need to reinstall all libraries but just pytorch. Thanks Partho 