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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 updateEmotionTone(user, emotionTone, maintainHistory):
 """ updateEmotionTone updates the user emotion tone with the primary emotion - the emotion tone that has a score greater than or equal to the EMOTION_SCORE_THRESHOLD; otherwise primary emotion will be 'neutral' @param user a json object representing user information (tone) to be used in conversing with the Conversation Service @param emotionTone a json object containing the emotion tones in the payload returned by the Tone Analyzer """

    maxScore = 0.0
    primaryEmotion = None
    primaryEmotionScore = None

    for tone in emotionTone['tones']:
        if tone['score'] > maxScore:
            maxScore = tone['score']
            primaryEmotion = tone['tone_name'].lower()
            primaryEmotionScore = tone['score']

    if maxScore <= PRIMARY_EMOTION_SCORE_THRESHOLD:
        primaryEmotion = 'neutral'
        primaryEmotionScore = None

    # update user emotion tone
    user['tone']['emotion']['current'] = primaryEmotion

    if maintainHistory:
        if 'history' not in user['tone']['emotion']:
            user['tone']['emotion']['history'] = []
            user['tone']['emotion']['history'].append({
                'tone_name': primaryEmotion,
                'score': primaryEmotionScore
            })