Permission denied for jython_kernel.py

[LewisMackay187]

After getting into the directory and typing 'python setup.py install' I get this message in my terminal:

running install running build running build_py running install_lib copying build/lib/jython_kernel.py -> /Library/Python/2.7/site-packages error: [Errno 13] Permission denied: '/Library/Python/2.7/site-packages/jython_kernel.py'

I have tried chown and cmod to gain access but nothing works. I can't gain permission to the file.