'Returns a string representation of this model.'

def __unicode__(self):

    return u'{}    user:    {},    course    version:    {},    subsection:    {}    ({}).    {}/{}    graded,    {}/{}    all,    first_attempted:    {}'.format(type(self).__name__, self.user_id, self.course_version, self.usage_key, self.visible_blocks_id, self.earned_graded, self.possible_graded, self.earned_all, self.possible_all, self.first_attempted)
