def get_assessment(self):
if not self.has_assessment:<EOL><INDENT>raise IllegalState()<EOL><DEDENT>else:<EOL><INDENT>raise Unimplemented()<EOL><DEDENT>
Gets the assessment associated with this learning objective.

        return: (osid.assessment.Assessment) - the assessment
        raise:  IllegalState - has_assessment() is false
        raise:  OperationFailed - unable to complete request
        compliance: mandatory - This method must be implemented.