(p3) killeent@devgpu047:~$ python
Python 3.6.1 |Continuum Analytics, Inc.| (default, Mar 22 2017, 19:54:23)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-1)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import torch
>>> torch.__file__
'/home/killeent/github/pytorch/torch/__init__.py'

As a result, the following consequences hold:

If we change a Python source file, the changes are automatically picked up, and we don't have to run any commands to let the Python interpreter see this change
If we change a C++ Source File in one of the extension libraries, we can re-run the develop command, it will re-build the extension

Thus we can develop the PyTorch codebases seamlessly, and test our changes in an easy way.
Working on the Dependency Libraries