python - 情感分析器错误: 'bytes' object has no attribute 'encode' using

Question

正在开发一个使用 nltk 进行股票情绪分析的项目。我在 GH 中进行了搜索，发现没有类似的 sentimaent_analysisr 或popularity_scores 调用。

我还查看了Python 3.4 - 'bytes' object has no attribute 'encode'它不是重复的，因为我没有调用 bcrypt.gensalt().encode('utf-8')。尽管它确实暗示了某些类型错误的问题。

谁能帮忙解决这个错误吗？

我收到错误:

/lib/python3.5/site-packages/nltk/sentiment/vader.py in init(self, text) 154 def init(self, text): 155 if not isinstance(text, str): --> 156 text = str(text.encode('utf-8')) 157 self.text = text 158 self.words_and_emoticons = self._words_and_emoticons()

AttributeError: 'bytes' object has no attribute 'encode'

数据帧 df_stocks.head(5) 是:

            prices  articles
2007-01-01  12469   What Sticks from '06. Somalia Orders Islamist...
2007-01-02  12472   Heart Health: Vitamin Does Not Prevent Death ...
2007-01-03  12474   Google Answer to Filling Jobs Is an Algorithm...
2007-01-04  12480   Helping Make the Shift From Combat to Commerc...
2007-01-05  12398   Rise in Ethanol Raises Concerns About Corn as...                

代码如下，最后一行发生错误:

import numpy as np
import pandas as pd
from nltk.classify import NaiveBayesClassifier
from nltk.corpus import subjectivity
from nltk.sentiment import SentimentAnalyzer
from nltk.sentiment.util import *from nltk.sentiment.vader import     SentimentIntensityAnalyzer
import unicodedata
for date, row in df_stocks.T.iteritems():
    sentence = unicodedata.normalize('NFKD', df_stocks.loc[date, 'articles']).encode('ascii','ignore')
    ss = sid.polarity_scores(sentence)

谢谢

Answer 1

来自 unicodedata.normalize() docs ，方法是将UNICODE字符串转换为通用格式字符串。

import unicodedata

print(unicodedata.normalize('NFKD', u'abcdあäasc').encode('ascii', 'ignore'))

它将得到:

b'abcdaasc'

所以，问题就在这里:df_stocks.loc[date, 'articles'] 不是 UNICODE 字符串。