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

python-pynetsnmp is installed in your system.

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

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

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

python-pynetsnmp package basic information: