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

python-xmlmarshaller is installed in your system.

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

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

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

python-xmlmarshaller package basic information: