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

---
id: 5e7b9f0b0b6c005b0e76f06e
title: 正則表達式
challengeType: 11
videoId: Yud_COr6pZo
dashedName: regular-expressions
---

# --question--

## --text--

哪一個正則表達式匹配只有一個空白字符？

## --answers--

\\S

---

\\s

---

.

---

\_

---

\\.

## --video-solution--

2
chore: seed chinese traditional (#42005) Seeds the chinese traditional files manually so we can deploy to staging. 2021-05-05 10:13:49 -07:00			`---`
			`id: 5e7b9f0b0b6c005b0e76f06e`
chore(i18n,curriculum): processed translations (#42721) 2021-07-02 18:45:29 +05:30			`title: 正則表達式`
chore: seed chinese traditional (#42005) Seeds the chinese traditional files manually so we can deploy to staging. 2021-05-05 10:13:49 -07:00			`challengeType: 11`
			`videoId: Yud_COr6pZo`
			`dashedName: regular-expressions`
			`---`

			`# --question--`

			`## --text--`

chore(i18n,curriculum): processed translations (#42721) 2021-07-02 18:45:29 +05:30			`哪一個正則表達式匹配只有一個空白字符？`
chore: seed chinese traditional (#42005) Seeds the chinese traditional files manually so we can deploy to staging. 2021-05-05 10:13:49 -07:00
			`## --answers--`

			`\\S`

			`---`

			`\\s`

			`---`

			`.`

			`---`

			`\_`

			`---`

			`\\.`

			`## --video-solution--`

			`2`