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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_video_transcript(video_id, language_code):
 """ Get video transcript info Arguments: video_id(unicode):
 A video id, it can be an edx_video_id or an external video id extracted from external sources of a video component. language_code(unicode):
 it will be the language code of the requested transcript. """

    transcript = VideoTranscript.get_or_none(video_id=video_id, language_code=language_code)
    return TranscriptSerializer(transcript).data if transcript else None