在NLTK停止语列表中添加和删除单词

Question

我正在尝试从NLTK停止字列表中添加和删除字：

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)

输出：

Traceback (most recent call last):
File "test_stop.py", line 10, in <module>
new_stopwords_list = set(stop_words.extend(new_stopwords))
AttributeError: 'set' object has no attribute 'extend'

Answer 1

试试这个：

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

您可以使用update而不是extend，并以此方式替换此行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，如果你用包含单词list的名称来调用set，可能会让人感到困惑

Answer 3

用list(set(...))代替set(...)，因为只有列表有一个名为extend:的方法

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