在Python的句子中打印“no，not，never”后面的否定词

Question

如何打印“no”，“not”，“never”之后的所有否定词。这句话是

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

期望的输出

going,happy (Which follows never and not)

任何帮助！

Answer 1

您可能不需要ntlk。我拆分字符串（使用正则表达式根据非字母表进行拆分（或者你有work.I'm部分的问题），并构建一个列表解析，查找属于＆＃34的前一个单词;否定＆＃34;单词。

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)

结果：

['going', 'happy']