The way to train and test this model

[zhilonglu]

The first time to run the main.py, there will be an error occurs.
importerror: cannot import name '_c' from 'core.nn'
It means we need to run the 'python setup.py build develop' in core, then the package will be installed.
If there is another error occurs,
subprocess.CalledProcessError: Command '['which', 'g++']' returned non-zero exit status 1.
It means that we need to install g++.
When g++ installed, we need to run python setup.py build develop, Finally we succeed.