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freeCodeCamp/curriculum/challenges/chinese/07-scientific-computing-with-python/python-for-everybody/regular-expressions-practical-applications.md

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---
id: 5e7b9f0b0b6c005b0e76f070
title: '正则表达式: 实用应用'
challengeType: 11
videoId: xCjFU9G6x48
bilibiliIds:
aid: 546924659
bvid: BV1mq4y1H7rZ
cid: 376386493
dashedName: regular-expressions-practical-applications
---
# --question--
## --text--
在正则表达式中,怎么搜索一个 “$” 符号?
## --answers--
$
---
\\dollar\\
---
\\$
---
!$
## --video-solution--
3