Regular Expressions 101

Save & Share

  • Regex Version: ver. 1
  • Update Regex
    ctrl+⇧+s
  • Save new Regex
    ctrl+s
  • Add to Community Library

Flavor

  • PCRE2 (PHP >=7.3)
  • PCRE (PHP <7.3)
  • ECMAScript (JavaScript)
  • Python
  • Golang
  • Java 8
  • .NET 7.0 (C#)
  • Rust
  • Regex Flavor Guide

Function

  • Match
  • Substitution
  • List
  • Unit Tests

Tools

Sponsors
There are currently no sponsors. Become a sponsor today!
An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
No Match

/
/
gm

Test String

Code Generator

Language

Generated Code

# coding=utf8 # the above tag defines encoding for this document and is for Python 2.x compatibility import re regex = r"(^ (?<Desc>[\s\S]*?) (?<QteComm>(?:[0-9]+)) (?<QteRecu>(?:[0-9]+)) (?<QteBO>(?:[0-9]*)) [$](?<PrixUnitaireF>(?:[0-9]+)\.(?:[0-9]+))[\s]+(?:(?<Escompte>(?:[0-9]+).(?:[0-9,]+)) %)?[\s]+(?<total_item>(?:[0-9]*[,]?[0-9]+)\.(?:[0-9]+))[\s]+[\r\n|\r|\n])" test_str = ("Date commandée Date de facture Commandé par Expédié par Votre numéro de commande\n" "04-OCT-2022 05-DÉC-2022 LIVRE DIRECT 786q23teqwuye\n" "Date d'expédition No. de compte No. Commis Notre No. commande\n" "No. livraison manuel\n" "05-DÉC-2022 358 MIB 21q24242456013\n" "Quantité\n" "Prix\n" "No. Produit Description Escompte Montant\n" "Commandé Livré unitaire\n" "Souffrance\n" "e e\n" " 32_SSL-\n" " PNI SSL-LH/480/20/40/287/DC/D 112 112 $73211.4800 8,022.44 \n" "LHB3/170/40/120/3\n" " 32_SSL- PNI AlloCie SSL-\n" " 6 6 $2.2700 17.48 \n" "LHB3/LV2/12V/CO LHB3/LV2/12V/CONTROLLER2\n" " 32_SSL-\n" " PNI AlloCie SSL-LH/LV/90V/SEN3erw2 175 175 $3.1100 4,044.25 \n" "LH/LV/90V/SEN\n" " livrer direct ref: s245354-5235 \n" " \n" " \n" " \n" " \n" " \n" " \n" " \n" " \n" " \n" " \n" " \n" " \n" " \n" " \n" " \n" " \n" "SOUS-TOTAL $1,041.31 \n" "TRANSPORT $0.00 \n" "FRAIS DIVERS $0.00 \n" "T.P.S. $151.07 \n" "T.V.Q. $296.38 \n" " \n") matches = re.finditer(regex, test_str, re.MULTILINE) for matchNum, match in enumerate(matches, start=1): print ("Match {matchNum} was found at {start}-{end}: {match}".format(matchNum = matchNum, start = match.start(), end = match.end(), match = match.group())) for groupNum in range(0, len(match.groups())): groupNum = groupNum + 1 print ("Group {groupNum} found at {start}-{end}: {group}".format(groupNum = groupNum, start = match.start(groupNum), end = match.end(groupNum), group = match.group(groupNum))) # Note: for Python 2.7 compatibility, use ur"" to prefix the regex and u"" to prefix the test string and substitution.

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Python, please visit: https://docs.python.org/3/library/re.html