Marathon - GUI Acceptance Test Runner

Is it possible to execute marathon recorded test cases from command line?

As marathon test cases are python scripts, I should be able to run them from command line using jython/python. But....., when I try to run any test case by typing following comand :

jython -v testcase.py

it starts importing all the dependencies and stops abruptly after printing "import ' Marathon' as java class"

it doesn't print any error after that and terminates the execution immediately.