Python：无法检索情绪分析

Question

我正在对从Twitter检索到的文本进行情感分析。我可以将文本索引到Solr中，但不能将新字段索引->将情感索引到Solr中。我可以知道添加新字段的正确方法是什么吗？

class Model:
    def __init__(self, text, sentiment):
        self.text = text
        self.sentiment = sentiment

class ModelEncoder(json.JSONEncoder):

    def clean_tweet(self, tweet):
        return ' '.join(re.sub("(@[A-Za-z0-9]+)|([^0-9A-Za-z \t])|(\w+:\/\/\S+)", " ", tweet).split())

    def analyze_sentiment(self, tweet):
        analysis = TextBlob(self.clean_tweet(tweet))  
        if analysis.sentiment.polarity > 0:
            return 'positive'
        elif analysis.sentiment.polarity == 0:
            return 'neutral'
        else:
            return 'negative'

    def default(self, obj):
        if isinstance(obj, Model):
            return {"text": obj.text,
                "sentiment": obj.sentiment}

        return json.JSONEncoder.default(self, obj)  

    def crawldata(self, name, store=False):
    ...
    while True:
    print('Crawling page', i, 'of', name)

    tweets = api.user_timeline(name, count=200, page=i)

    for tweet in tweets:
      text = tweet.text
      sentiment = self.analyze_sentiment(tweet.text)

      data = Model(text, sentiment)
      result.append(data)

    i += 1
    print('Crawled', len(tweets), 'tweets')

    if len(tweets) == 0:
      break

  result_json = json.dumps(result, cls=ModelEncoder)
  ...