$ sudo apt-get update
$ sudo apt-get install python-nwsserver 

python-nwsserver is installed in your system.

Make ensure the python-nwsserver package were installed using the commands given below,

$ sudo dpkg-query -l | grep python-nwsserver *

You will get with python-nwsserver package name, version, architecture and description in a table

python-nwsserver package basic information: