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

python-neutronclient is installed in your system.

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

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

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

python-neutronclient package basic information: