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
Processing...

Test String

Code Generator

Language

Generated Code

import re regex = re.compile(r"(?:[0-2])?[0-9]:[0-5][0-9](?::[0-5][0-9])?(?:(?:\\s)?[AP]M)?", flags=re.MULTILINE) test_str = ("Nos dois sistemas.\n\n" "Em 22 de maio de 2018 10:23, Sistema Delta <sistemaerp@deltasi.com.br>\n" "escreveu:\n\n" "> ##- Não escreva abaixo desta linha -##\n" ">\n" "> *Comentário adicionado por FERNANDO TEIXEIRA BARROS em 22/05/2018 10:23*\n" "> *Usuário:* FERNANDO TEIXEIRA BARROS* Data:* 22/05/2018 10:23:25\n" ">\n" "> *COMENTÁRIO:*\n" "> Bom dia Mayla,\n" "> Apenas sistema Montafarma?\n" "> ------------------------------\n" ">\n" "> *ID Reporte: * #1468\n" "> *Situação: * *ABERTO*\n" "> *Módulo:* Produção\n" "> *Tela:* ordem de pedido\n" "> *Nome: * mayla.capana - MAYLA CAPANA\n" "> *Emissão: * 22/05/2018 12:00:00\n" "> *Fechamento: * -\n" "> *Responsável: * DELTA SI\n" "> *Prioridade: * Urgente\n" "> *Tipo: * Ajuda\n" ">\n" "> *MENSAGEM: *\n" "> Bom dia,\n" ">\n" "> Por favor liberar o meu acesso, Izac e Priscila, para a tela de Produção -\n" "> Ordem de Pedido. (igual a tela que a Iza tem acesso).\n" ">\n" "> Aguardo retorno.\n" ">\n" "> Até,\n" ">\n" ">") 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