def get_or_none(cls, video_id, language_code):
        """
        Returns a data model object if found or none otherwise.

        Arguments:
            video_id(unicode): video id to which transcript may be associated
            language_code(unicode): language of the requested transcript
        """
        try:
            transcript = cls.objects.get(video__edx_video_id=video_id, language_code=language_code)
        except cls.DoesNotExist:
            transcript = None

        return transcript
Returns a data model object if found or none otherwise.

        Arguments:
            video_id(unicode): video id to which transcript may be associated
            language_code(unicode): language of the requested transcript