如何使用正则表达式在单词边界处分割? [英] How can I split at word boundaries with regexes?

问题描述

我正在尝试这样做:

import re
sentence = "How are you?"
print(re.split(r'\b', sentence))

结果是

[u'How are you?']

我想要类似[u'How', u'are', u'you', u'?']的东西.如何实现?

I want something like [u'How', u'are', u'you', u'?']. How can this be achieved?

推荐答案

不幸的是，Python无法用空字符串分割.

Unfortunately, Python cannot split by empty strings.

要解决此问题，您需要使用findall而不是split.

To get around this, you would need to use findall instead of split.

实际上\b仅表示单词边界.

Actually \b just means word boundary.

等效于(?<=\w)(?=\W)|(?<=\W)(?=\w).

这意味着，以下代码将起作用:

That means, the following code would work:

import re
sentence = "How are you?"
print(re.findall(r'\w+|\W+', sentence))

这篇关于如何使用正则表达式在单词边界处分割?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！