python nltk——句子/短语的词干列表

我在一个列表中有很多句子，我想用nltk库来阻止它。我能够一次干掉一个句子，但是我在从列表中干掉句子并将它们重新连接在一起时遇到了问题。有没有我错过的一步？nltk库非常新。谢谢

import nltk 
from nltk.stem import PorterStemmer 
ps = PorterStemmer()

# Success: one sentences at a time 
data = 'the gamers playing games'
words = word_tokenize(data)
for w in words:
    print(ps.stem(w))


# Fails: 

data_list = ['the gamers playing games',
            'higher scores',
            'sports']
words = word_tokenize(data_list)
for w in words:
    print(ps.stem(w))

# Error: TypeError: expected string or bytes-like object
# result should be: 
['the gamer play game',
 'higher score',
 'sport']

---

您正在将一个列表传递给

word\u tokenize

，但您不能这样做

解决方案是将逻辑包装在另一个

for循环中

data_list = ['the gamers playing games','higher scores','sports']
for words in data_list:
    words = tokenize.word_tokenize(words)
    for w in words:
        print(ps.stem(w))

>>>>the
gamer
play
game
higher
score
sport