Regular Expressions 101

Save & Manage Regex

  • Current Version: 1
  • Save & Share
  • Community Library

Flavor

  • PCRE2 (PHP)
  • ECMAScript (JavaScript)
  • Python
  • Golang
  • Java
  • .NET 7.0 (C#)
  • Rust
  • PCRE (Legacy)
  • Regex Flavor Guide

Function

  • Match
  • Substitution
  • List
  • Unit Tests
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
Processing...

Test String

Code Generator

Language

Generated Code

import re regex = re.compile(r"^(\p{Lu}+)\h+(.*(?:\R(?!\p{Lu}+\h).*)*)", flags=re.MULTILINE | re.UNICODE) test_str = ("ОБАНДОМ آباندام маљ. обпайкар, нозукан- дом, латифбадан.\n" "FБАФКАН آبافكن муњаррики обафкан, даст- гоњи обпошї.\n" "БАНЉИР انجير آب обе, ки дар он анљири ќоќ\n" "ва хушкро мељӯшонанд ва он хусусияти\n" "табобатї дорад.\n" "ӮББАДАЛ بدل آب муовизаи об, табдили об.\n" "ТББАНД بند آب 1. он ки дар пеши об банд ё\n" "дарѓот месозад. 2. банд, дарѓот.\n" "ОББАР بر آب 1. он ки об мебарад, обкаш, маш- коб. 2. маљ. маъшуќ, ки тавассути њуснаш\n" "обрўи ошиќи худро зери хавфи коҳиш\n" "мегузорад. 3. тех. облўла, лўлаи обрасонї, ќубури обгузар.\n" "ЗББАРДОР آببردار 1. обро ба худ гиранда, он\n" "чи зиёд об талаб мекунад, обталаб; биринљи\n" "оббардор. 2. ниг. обчинак.\n" "ҚББАРДОРЇ آببرداري 1. обкашї, машкобї. 2.\n" "об бардоштани чизе (мас., биринљ).") matches = regex.finditer(test_str) for match_num, match in enumerate(matches, start=1): print(f"Match {match_num} was found at {match.start()}-{match.end()}: {match.group()}") for group_num, group in enumerate(match.groups(), start=1): print(f"Group {group_num} found at {match.start(group_num)}-{match.end(group_num)}: {group}")

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