在Python中，在句子中打印否定詞語「no，not，never」在句子中

Question

如何打印「no」，「not」，「never」等所有否定詞。這句話是

SENTENCE="It was never going to work.I'm not happy" 

所需的輸出

going,happy (Which follows never and not) 

任何幫助！

Answer 1

您可能不需要ntlk。我會拆分字符串（使用正則表達式根據非alphanums進行拆分（或者您有一個work.I'm部分的問題），並構建一個列表理解，查找屬於「否定」單詞的前一個單詞。

import re 

SENTENCE="It was never going to work.I'm not happy" 

all_words = re.split("\W+",SENTENCE) 

words = [w for i,w in enumerate(all_words) if i and (all_words[i-1] in ["not","never","no"])] 

print(words) 

結果：！。

['going', 'happy']