Regular Expressions 101

Spo⁠nsors
Learn to code interactively with bite-sized, hands-on programming challenges.

Community Library

83

Distinguish torrent files (series vs movies)

Created·2014-06-26 09:59
Updated·2023-07-20 15:08
Type·Match
Flavor·Python
A neat regex for finding out whether a given torrent name is a series or a movie. Returns the full name of the series with the separator needed to make it pretty (ie, replace it with space or what you want). Also returns the season number or the year for the movie/series, depending on what was previously matched.
Submitted by Firas Dib
3

phone

Created·2015-05-07 17:14
Type·Match
Flavor·Python
matches: + example: +52 33 3884 7720 +1 770 343 5788
Submitted by miqui
9

Extract Protocol, URL, URL Path, get parameters and hash from URI

Created·2014-05-22 23:34
Type·Match
Flavor·Python
This is simplified from my last submission.
Submitted by Dale O'Brien
9

domain - host

Created·2015-09-29 17:50
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
7

CSS Import

Created·2014-05-03 00:51
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
13

Conventional Commits validation

Created·2022-01-03 20:30
Updated·2022-04-05 20:20
Type·Match
Flavor·Python
This regex prevents the writing of non-standard conventional commits. I'm available on my github
Submitted by Krisque
12

Find Reddit Threads

Created·2015-03-12 09:23
Type·Match
Flavor·Python
Simply searches for the thread-id in any kind of valid reddit-URL.
Submitted by Mio
1

Regular expression to remove all puncutation

Created·2014-06-20 07:18
Type·Match
Flavor·Python
Removes all of the puncutation present inlcuding \n,\t,\r
Submitted by Abhinav Gupta
11

extract subdomain(if available) or domain from URL

Created·2016-04-08 13:05
Type·Substitution
Flavor·Python
This regex should extract the subdomain, if any, or the domain, if no subdomain is used, from an arbitrary URL
Submitted by trevi@twanda.com
8

repeat group match

Created·2015-07-24 21:02
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
10

entity

Created·2015-11-20 01:12
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
9

English date in "dd mmmm yyyy" format

Created·2015-05-18 19:41
Type·Match
Flavor·Python
Parse an English date following the "dd mmmm yyyy" format.
Submitted by Tantale
4

Complete imgur link regex

Created·2015-03-13 11:26
Type·Match
Flavor·Python
This regex grabs all kinds of imgur links and groups them in meaningful names aswell. This way you have full flow-control in your python-scripts.
Submitted by Mio
5

Find consecutive duplicate words

Created·2015-08-31 22:17
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
7

IOS3166 Country Code Identification REGEX

Created·2015-06-07 04:48
Type·Substitution
Flavor·Python
IOS3166 Country Code Identification REGEX
Submitted by theitgeek@recu.org.uk
7

SO: fail2ban regular to find 403 request in nginx

Created·2014-09-15 11:32
Updated·2023-07-27 20:59
Type·Match
Flavor·Python
http://stackoverflow.com/q/25778420/2072035
Submitted by Anonymous
3

date time

Created·2014-01-29 03:45
Type·Match
Flavor·Python
1/Jul/2013 03:27:12
Submitted by himel
1

dd/mm/yyyy validation regexp

Created·2015-09-17 10:54
Type·Match
Flavor·Python
no description available
Submitted by uknnown
2

postgesql

Created·2015-08-11 09:45
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
3

Twitch URL Regex

Created·2015-03-15 12:53
Type·Match
Flavor·Python
Can grab all kinds of valid twitch URLs.
Submitted by Mio
1

Parse a HTML URL

Created·2014-05-22 23:07
Type·Match
Flavor·Python
Break a URL into parts: protocol url path get parameters hash
Submitted by Dale O'Brien
4

Bible reference extractor

Created·2016-04-04 08:31
Type·Match
Flavor·Python
For scraping http://skepticsannotatedbible.com/
Submitted by antaytheist-owner
6

Find and extract email domain

Created·2016-04-03 17:03
Type·Match
Flavor·Python
Find and extract email domain. Ex: test@example.pt -> extract 'example.pt'
Submitted by Fnxk
1

REGEX

Created·2015-04-04 13:58
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
5

Match Only Text

Created·2016-07-05 03:56
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
5

psswd

Created·2016-03-24 09:04
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
5

Form Tag

Created·2016-02-26 06:49
Type·Match
Flavor·Python
Form Tag
Submitted by Jay Patel
5

import url image

Created·2015-12-18 08:44
Type·Match
Flavor·Python
import url image
Submitted by bartimeys
0

Get any word before specific string

Created·2015-09-05 06:41
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
-3

Matches percentage with any number of digits

Created·2015-06-10 19:26
Type·Match
Flavor·Python
Only captures value for converting percentage to decimal. Returns empty if percentage but no value. no match = no percentage found
Submitted by sharkey
-1

woop

Created·2015-02-15 22:12
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
1

quoted string in VB.net format

Created·2014-05-20 11:06
Type·Substitution
Flavor·Python
Get all strings in vb.net format (even nested quotes"
Submitted by Alan Moore (http://stackoverflow.com/questions/2148587/finding-quoted-strings-with-escaped-quotes-in-c-sharp-using-a-regular-expression) modified by j
1

IPv4 extraction

Created·2014-04-04 13:05
Type·Match
Flavor·Python
no description available
Submitted by Jacob
-2

Between two strings

Created·2015-10-27 19:18
Type·Substitution
Flavor·Python
Awesome explanation of nested lookbacks
Submitted by OnlineCop
4

Equation matching (without equal)

Created·2015-07-01 19:50
Type·Match
Flavor·Python
use this to get value of any side of an equation. You can combine this with https://regex101.com/r/fH5kJ1/1
Submitted by Kerosene2000
3

prices in nis

Created·2015-06-15 15:16
Type·Match
Flavor·Python
no description available
Submitted by molaxx
1

States

Created·2015-05-06 17:38
Type·Match
Flavor·Python
States (US) 2 char format, matches: Ga or GA
Submitted by miqui
2

Find any digits in string

Created·2015-04-11 11:31
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
0

Find email address in a string.

Created·2014-06-11 17:57
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
-1

Twitter #hashtags

Created·2013-10-17 17:40
Type·Substitution
Flavor·Python
Using the twitter API, take a tweet object and find & link #tags to embed in HTML
Submitted by @triplec1988
3

Thorough UK Postcode Validator with In/Out code capture groups

Created·2016-09-30 15:51
Type·Match
Flavor·Python
A more thorough UK postcode validator tested against all UK postcodes on a regular basis, but excluding the special GIRO postcode case out of personal preference. Additionally has capture groups for the In-code and Out-code sections. Requires case insensitive matching.
Submitted by Chris G
3

Email

Created·2016-09-07 03:55
Type·Match
Flavor·Python
Python
Submitted by Anonymous
3

Capture Query Strings

Created·2016-05-15 10:22
Type·Match
Flavor·Python
A solution for capture query params.
Submitted by Rafael Laurindo
2

Port validator

Created·2016-04-19 10:13
Type·Match
Flavor·Python
Validates port numbers from 1 to 65535
Submitted by Agustín Bouillet
2

match those lines whose first n chars contains 1+ non numeric

Created·2016-04-05 20:01
Type·Match
Flavor·Python
1100582367|SDFDSFDSFDSFDSFDF GBC213WREW|RWEFSDFSDF 1100582377|DSFDSFDSFDSF 2NDG.S.D BIKADSFDSFDSFNO.421 1100582387|SDFSDFSDFDSF
Submitted by sid
3

iframe src parser

Created·2016-01-05 12:41
Type·Match
Flavor·Python
Get iframe src
Submitted by Sumeet Fefar
-2

Email Validation

Created·2015-12-01 22:35
Type·Match
Flavor·Python
Full email validation with optional "." "-" "_"
Submitted by Jakub Stasiak
1

Address Match

Created·2015-11-16 15:43
Type·Match
Flavor·Python
no description available
Submitted by Awk
2

SED

Created·2015-11-12 15:42
Type·Match
Flavor·Python
no description available
Submitted by Anonymous
1

json comment - first attempt

Created·2015-11-05 20:27
Type·Match
Flavor·Python
no description available
Submitted by Mark

Community Library Entry

0

Regular ExpressionOpen Workspace

/
([\p{So}\p{Sk}\p{S}\p{P}\p{M}])
/
gmu

Description
Created·2023-03-10 06:28
Type·Match
Flavor·JavaScript

Match all emojis using unicode

Submitted by Sagar Panchal
Open Workspace