所以我使用pandas从csv文件中获取输入,并使用nltk对其执行标记化。但是我收到以下错误:
Traceback (most recent call last):
File "test.py", line 20, in <module>
word = nltk.word_tokenize(words)
File "/home/codelife/.local/lib/python3.5/site-packages/nltk/tokenize/__init__.py", line 109, in word_tokenize
return [token for sent in sent_tokenize(text, language)
File "/home/codelife/.local/lib/python3.5/site-packages/nltk/tokenize/__init__.py", line 94, in sent_tokenize
return tokenizer.tokenize(text)
File "/home/codelife/.local/lib/python3.5/site-packages/nltk/tokenize/punkt.py", line 1237, in tokenize
return list(self.sentences_from_text(text, realign_boundaries))
File "/home/codelife/.local/lib/python3.5/site-packages/nltk/tokenize/punkt.py", line 1285, in sentences_from_text
return [text[s:e] for s, e in self.span_tokenize(text, realign_boundaries)]
File "/home/codelife/.local/lib/python3.5/site-packages/nltk/tokenize/punkt.py", line 1276, in span_tokenize
return [(sl.start, sl.stop) for sl in slices]
File "/home/codelife/.local/lib/python3.5/site-packages/nltk/tokenize/punkt.py", line 1276, in <listcomp>
return [(sl.start, sl.stop) for sl in slices]
File "/home/codelife/.local/lib/python3.5/site-packages/nltk/tokenize/punkt.py", line 1316, in _realign_boundaries
for sl1, sl2 in _pair_iter(slices):
File "/home/codelife/.local/lib/python3.5/site-packages/nltk/tokenize/punkt.py", line 310, in _pair_iter
prev = next(it)
File "/home/codelife/.local/lib/python3.5/site-packages/nltk/tokenize/punkt.py", line 1289, in _slices_from_text
for match in self._lang_vars.period_context_re().finditer(text):
TypeError: expected string or bytes-like object
以下是代码:
from textblob import TextBlob
import nltk #for cleaning and stop wrds removal
import pandas as pd #csv
import numpy
data = pd.read_csv("Sample.csv", usecols=[0]) #reading from csv file
num_rows = data.shape[0]
#print(questions)
# cleaning the data
count_nan = data.isnull().sum() #counting no of null elements
count_without_nan = count_nan[count_nan==0] #no of not null elements
data = data[count_without_nan.keys()] # removing null columns
data_mat = data.as_matrix(columns= None) #converting to numpy matrix
print(data_mat)
for question in data_mat:
words = question.tolist()
word = nltk.word_tokenize(words)
print(word)
我认为这是因为我使用的是numpy数组。如何将其转换为常规python列表?
答案 0 :(得分:0)
nltk的word_tokenize()
函数需要获取单个字符串。它将返回它包含的标记列表。要将它应用于整个Python列表,numpy数组或pandas数据帧,您需要在Python中循环(循环或理解)或使用numpy或pandas apply*
方法。例如,如果words
是np.array
,您可以使用以下理解来迭代它。
sentences = [ nltk.word_tokenize(string) for string in words ]
如果单词是其他内容,您需要调整代码或向我们展示您问题中的内容。