Unhashable type: 'list' error for stopwords

Question

Here is my code

URL to CSV file: https://github.com/eugeneketeni/web-mining-final-project/blob/master/Test_file.csv

import pandas as pd

data = pd.read_csv("https://raw.githubusercontent.com/eugeneketeni/web- 
mining-final-project/master/Test_file.csv")

import nltk
from nltk import word_tokenize, sent_tokenize


data['text'] = data.loc[:, 'text'].astype(str)

text = data.loc[:, "text"].astype(str)
tokenizer = [word_tokenize(text[i]) for i in range(len(text))]
print(tokenizer)

filtered_sentence = []


from nltk.corpus import stopwords
stopwords = set(stopwords.words('english'))

filtered_sentence = [w for w in tokenizer if not w in stopwords]
print(filtered_sentence) 

My tokenizer works but when I try to remove the default stopwords, I keep getting "unhashable type: 'list'" error. I am not sure what really going on. I would appreciate any help. Thanks.

Answer 1

TL;DR

from nltk import word_tokenize
from nltk.corpus import stopwords

import pandas as pd

stoplist = set(stopwords.words('english'))

data = pd.read_csv("Test_file.csv")

data['filtered_text'] = data['text'].astype(str).apply(lambda line: [token for token in word_tokenize(line) if token not in stoplist])

In Long

Please see Why is my NLTK function slow when processing the DataFrame? for more detailed explanation on:

• tokenize text in a dataframe
• remove stopwords
• other related cleaning processes

---

For better, twitter text processing

pip3 install -U nltk[twitter]

Then use this:

from nltk.corpus import stopwords

from nltk.tokenize import TweetTokenizer

import pandas as pd

word_tokenize = TweetTokenizer().tokenize

stoplist = set(stopwords.words('english'))

data = pd.read_csv("Test_file.csv")

data['filtered_text'] = data['text'].astype(str).apply(lambda line: [token for token in word_tokenize(line) if token not in stoplist])