Regular Expressions 101

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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

/
/
g

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"([0-9]{1,2}[\/][0-9]{1,2}[\/][0-9]{1,4}) ([0-9]{1,2}:[0-9]{1,2}) - ([a-z0-9 \S]+?:)([a-z0-9 \S]+?\n)" test_str = ("25/03/2017 09:32 - ‎Diego Rhoger criou o grupo \"CerradoValley\"\n" "27/04/2017 15:42 - Você entrou usando o link de convite deste grupo\n" "27/04/2017 15:43 - +55 61 9332-2990: Valeu 👍🏻\n" "27/04/2017 15:43 - Fabiano S Figueiredo: 🙃👍\n" "27/04/2017 15:43 - ‎Dartagnan Sabino Antunes Oliveira entrou usando o link de convite deste grupo\n" "27/04/2017 15:44 - Fabiano S Figueiredo: e aí gente, tudo bem?\n" "27/04/2017 15:44 - Fabiano S Figueiredo: Onde e como saber quem é quem? :D\n" "27/04/2017 15:44 - +55 61 9332-2990: No decorrer das conversas vc vai conhecendo o pessoal rs\n" "27/04/2017 15:45 - Fabiano S Figueiredo: né? :)\n" "27/04/2017 15:45 - +55 61 9869-0018: é a única forma\n" "27/04/2017 15:45 - +55 61 9869-0018: e ir aos meetups da vida\n" "27/04/2017 15:46 - Fabiano S Figueiredo: Jóia. E normalmente o que é discutido aqui?\n" "27/04/2017 15:55 - +55 61 9332-2990: Discutimos sobre mercado, economia, startups, comportamento empreendedor\n" "27/04/2017 15:55 - +55 61 9332-2990: E as vezes a gente se espanca em assuntos de religiao e política\n" "27/04/2017 15:55 - +55 61 9332-2990: As tudo fica bem depois\n" "27/04/2017 15:56 - Fabiano S Figueiredo: Massa!!\n" "27/04/2017 15:56 - +55 61 9332-2990: @556181302875 apresenta aí sua startup cara com poucas palavras\n" "27/04/2017 15:56 - Fabiano S Figueiredo: Legal!!\n" "27/04/2017 15:56 - +55 61 9332-2990: E manda o vídeo tbm rs\n" "27/04/2017 15:56 - +55 61 9332-2990: Bota aí pra colher a opinião da gakera\n" "27/04/2017 15:57 - +55 61 9332-2990: A minha vc já tem 👍🏻\n" "27/04/2017 15:57 - Fabiano S Figueiredo: Qual é a do Vídeo?\n" "27/04/2017 15:57 - +55 61 9332-2990: É pro @556181302875 rs\n" "27/04/2017 15:57 - Fabiano S Figueiredo: Ahh!! ups!\n" "27/04/2017 16:01 - Dartagnan Sabino Antunes Oliveira: Boa tarde Galera! Sou o Dartagnan, analista e desenvolvedor de sistemas.\n\n") matches = re.finditer(regex, test_str) 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