How to remove python3-gsw from Debian 9 (Stretch)

Uninstall python3-gsw

To remove just python3-gsw package itself from Debian 9 (Stretch) execute on terminal:

sudo apt-get remove python3-gsw

To remove the python3-gsw package and any other dependant package which are no longer needed from Debian Stretch.

sudo apt-get remove --auto-remove python3-gsw

If you also want to delete configuration and/or data files of python3-gsw from Debian Stretch then this will work:

sudo apt-get purge python3-gsw

To delete configuration and/or data files of python3-gsw and it's dependencies from Debian Stretch then execute:

sudo apt-get purge --auto-remove python3-gsw