I am able to make some progress by python setup.py install as indicated in the link. It seems to install some torch related python files locally, import torch now shows different kinds of error, but it seems to be caused by missing packages and I will try to resolve it.
My problem is I need a deb equivalent for python so that I can distribute the build to my other machines. Based on the verbose message of running python setup.py install, the first line shows
Building wheel torch-1.3.0a0+de394b6

After some googling, wheel files seems to be the equivalent of deb files for python, which is good news, but the problem is no wheel file is generated. Am I missing something?