从NLTK停用词列表中添加和删除词

Question

我正在尝试从NLTK停用词列表中添加和删除单词：

res

输出：

from nltk.corpus import stopwords

stop_words = set(stopwords.words('french'))

#add words that aren't in the NLTK stopwords list
new_stopwords = ['cette', 'les', 'cet']
new_stopwords_list = set(stop_words.extend(new_stopwords))

#remove words that are in NLTK stopwords list
not_stopwords = {'n', 'pas', 'ne'} 
final_stop_words = set([word for word in new_stopwords_list if word not in not_stopwords])

print(final_stop_words)

Answer 1

尝试一下：

from nltk.corpus import stopwords

stop_words = set(stopwords.words('french'))

#add words that aren't in the NLTK stopwords list
new_stopwords = ['cette', 'les', 'cet']
new_stopwords_list = stop_words.union(new_stopwords)

#remove words that are in NLTK stopwords list
not_stopwords = {'n', 'pas', 'ne'} 
final_stop_words = set([word for word in new_stopwords_list if word not in not_stopwords])

print(final_stop_words)

Answer 2

请list(set(...))插入set(...)，因为只有列表具有称为extend的方法：

...
stop_words = list(set(stopwords.words('french')))
...

Answer 3

您可以使用update代替extend，并以这种方式替换此行new_stopwords_list = set(stop_words.extend(new_stopwords))：

stop_words.update(new_stopwords)
new_stopwords_list = set(stop_words)

顺便说一句，如果您使用包含单词set的名称来调用list，则可能会造成混淆。