'Split specific lookup'

def _find_course_assets(self, course_key):

    try:
        course_assets = self._lookup_course(course_key).structure.get('assets', {})
    except (InsufficientSpecificationError, VersionConflictError) as err:
        log.warning(u'Error    finding    assets    for    org    "%s"    course    "%s"    on    asset    request.    Either    version    of    course_key    is    None    or    invalid.', course_key.org, course_key.course)
        return {}
    return course_assets
