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

python-secretstorage is installed in your system.

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

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

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

python-secretstorage package basic information: