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

/
/
gm

Test String

Substitution

Processing...

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"(Descrição:.{8})" test_str = ("\n" " Pagamento Eletrônico de Tributos/Contas de Consumo Bradesco \n" " Comprovante de Pagamento \n\n" " GUIA NACIONAL DE RECOLHIMENTO ESTADUAL - GNRE \n\n" " Código de Barras: 85840011134 1 62370278120 4 16110902000 4 02006081262 6 \n\n" " Empresa / Órgão: SEFAZ RIO DE JANEIRO - GNRE/RJ \n\n" " NOSSO NUMERO 02000020060812 \n\n" " Descrição: GNRE Data de Vencimento: 09/11/2016 \n\n" " Data do Pagamento: 09/11/2016 \n\n" " Valor Principal: R$ 1.113.462,37 \n\n" " Valor de Juros: R$ 0,00 \n\n" " Valor de Multa: R$ 0,00 Valor do Pagamento: R$ 1.113.462,37 \n\n" " Autenticação Bancária: 095465354 \n\n" " Núm . de Controle: 60100608868888950348801055 \n\n" " ICMS-ST INTEREST DE SP PARA RJ 102016 \n\n" " A GNRE - Guia Nacional de Recolhimento de Tributos Estaduais acima foi efetuada através do PTRB - Pagamento Eletrônico de \n" " Tributos, dentro das condições especificadas. O lançamento consta no extrato da conta junto à agência 313-1, data de pagamento \n" " 09/11/2016. \n" " N° do Documento: 04370837900012016110900158 \n" " Alô Bradesco – SAC – 0800 704 8383 Deficiente Auditivo – 0800 722 0099, atendimento 24 horas, 7 dias por semana. Ouvidoria – 0800 \n" " 727 9933, atendimento de 2ª a 6ª feira das 8h às 18h, exceto feriados \n\n" " Banco Bradesco S/A \n\n\n") subst = "$1" # You can manually specify the number of replacements by changing the 4th argument result = re.sub(regex, subst, test_str, 0, re.MULTILINE) if result: print (result) # 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