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

python-toscawidgets is installed in your system.

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

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

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

python-toscawidgets package basic information: