如何使用正则表达式查找以冒号（：）结尾的所有单词

Question

我不熟悉正则表达式，我有以下表达式，我想使用正则表达式查找以冒号（：）结尾的单词或连续单词

Incarcerate: imprison or confine, Strike down: if someone is struck down, especially by an illness, they are killed or severely harmed by it, Accost: approach and address.

输出应该是这样的Incarcerate:, Strike down:, Accost:。我已经编写了以下正则表达式，但它捕获了以下内容

我的正则表达式->(\w+):+

它捕获像Incarcerate:, Accost:这样的单词，但不捕获Strike down: 请帮帮我

我想用typescript和python两种语言来实现它

Answer 1

您可以选择重复空格和1+字字符。注意，单词在组1中，:在组外

(\w+(?: \w+)*):

Regex demo

要在匹配中包括:，请执行以下操作：

\w+(?: \w+)*:

模式匹配

• \w+匹配一个或多个单词字符
• (?: \w+)*匹配空格和1+个单词字符重复0+次
• :匹配单个:

Regex demo

Python中的示例

import re
s = "Incarcerate: imprison or confine, Strike down: if someone is struck down, especially by an illness, they are killed or severely harmed by it, Accost: approach and address."
pattern = r"\w+(?: \w+)*:"
 
print(re.findall(pattern, s))

输出

['Incarcerate:', 'Strike down:', 'Accost:']