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

Substitution
Processing...

Code Generator

Language

Generated Code

import re regex = re.compile(r"\s+TStatusBar", flags=re.IGNORECASE) test_str = ("inherited FormPadrao: TFormPadrao\n" " Left = 354\n" " Top = 155\n" " Caption = 'FormPadrao'\n" " ClientHeight = 342\n" " ClientWidth = 655\n" " KeyPreview = True\n" " PopupMenu = MnPop_Principal\n" " OnCloseQuery = FormCloseQuery\n" " OnDeactivate = FormDeactivate\n" " ExplicitWidth = 671\n" " ExplicitHeight = 381\n" " DesignSize = (\n" " 655\n" " 342)\n" " PixelsPerInch = 96\n" " TextHeight = 15\n" " object Bv_Top: TBevel [0]\n" " Left = 0\n" " Top = 0\n" " Width = 655\n" " Height = 2\n" " Align = alTop\n" " end\n" " object Sb_FormPadrao: TStatusBar [1]\n" " Left = 0\n" " Top = 317\n" " Width = 655\n" " Height = 25\n" " Panels = <\n" " item\n" " Bevel = pbNone\n" " Text = 'Usu'#225'rio'\n" " Width = 100\n" " end\n" " item\n" " Bevel = pbNone\n" " Width = 50\n" " end>\n" " ParentColor = True\n" " ParentFont = True\n" " UseSystemFont = False\n" " ExplicitTop = 323\n" " end\n" " object Pn_BaseToolBar: TPanel [2]\n" " Left = 0\n" " Top = 2\n" " Width = 655\n" " Height = 73\n" " Align = alTop\n" " BevelOuter = bvNone\n" " ParentColor = True\n" " TabOrder = 2\n" " end\n" " object Pn_BaseGrid: TPanel [3]\n" " Left = 0\n" " Top = 75\n" " Width = 655\n" " Height = 242\n" " Align = alClient\n" " BevelOuter = bvNone\n" " BorderWidth = 3\n" " ParentColor = True\n" " TabOrder = 4\n" " ExplicitLeft = 32\n" " ExplicitTop = 95\n" " ExplicitHeight = 222\n" " end\n" " inherited MinMax: TmgMinMax\n" " Top = 7\n" " MinTrackSize.X = 450\n" " MinTrackSize.Y = 300\n" " ExplicitTop = 7\n" " end\n" " object Mn_Principal: TMainMenu [6]\n" " Left = 4\n" " Top = 36\n" " object miTabela: TMenuItem\n" " Caption = '&Tabela'\n" " object miInserir: TMenuItem\n" " Caption = '&Inserir'\n" " end\n" " object miApagar: TMenuItem\n" " Caption = '&Apagar'\n" " end\n" " object miPropriedades: TMenuItem\n" " Caption = '&Editar'\n" " end\n" " object N4: TMenuItem\n" " Caption = '-'\n" " end\n" " object miFechar: TMenuItem\n" " Caption = '&Fechar'\n" " OnClick = miFecharClick\n" " end\n" " end\n" " object miEditar1: TMenuItem\n" " Caption = '&Editar'\n" " object miRecortar1: TMenuItem\n" " Caption = '&Recortar'\n" " end\n" " object miCopiar1: TMenuItem\n" " Caption = '&Copiar'\n" " end\n" " object miColar1: TMenuItem\n" " Caption = '&Colar'\n" " end\n" " end\n" " object miExibir: TMenuItem\n" " Caption = '&Exibir'\n" " object miBarradeFerramentas: TMenuItem\n" " Caption = 'Barra de &Ferramentas'\n" " object miNaoExibir: TMenuItem\n" " Caption = '&N'#227'o Exibir'\n" " GroupIndex = 1\n" " RadioItem = True\n" " OnClick = mi_NaoExibirClick\n" " end\n" " object N5: TMenuItem\n" " Caption = '-'\n" " GroupIndex = 1\n" " RadioItem = True\n" " end\n" " object miAlto: TMenuItem\n" " Caption = '&Alto'\n" " GroupIndex = 1\n" " RadioItem = True\n" " OnClick = mi_AltoClick\n" " end\n" " object miBaixo: TMenuItem\n" " Caption = '&Baixo'\n" " GroupIndex = 1\n" " RadioItem = True\n" " OnClick = mi_BaixoClick\n" " end\n" " end\n" " object miBarradeStatus: TMenuItem\n" " Caption = 'Barra de &Status'\n" " OnClick = mi_BarradeStatusClick\n" " end\n" " object mi_SepN3: TMenuItem\n" " Caption = '-'\n" " end\n" " object mi_Informacoesdajanela1: TMenuItem\n" " Caption = 'Informa'#231#245'es desta Janela'\n" " OnClick = mi_Informacoesdajanela1Click\n" " end\n" " object mi_Sepm9: TMenuItem\n" " Caption = '-'\n" " Visible = False\n" " end\n" " object mi_OcorrenciaAuditoria: TMenuItem\n" " Caption = 'Logs de Auditoria'\n" " Visible = False\n" " OnClick = mi_OcorrenciaAuditoriaClick\n" " end\n" " end\n" " object Mi_Ajuda: TMenuItem\n" " Caption = '&Ajuda'\n" " object Mi_AjudaProcesso: TMenuItem\n" " Caption = 'Ajuda &Processo'\n" " ShortCut = 112\n" " OnClick = Mi_AjudaProcessoClick\n" " end\n" " object Mi_AjudaTela: TMenuItem\n" " Caption = 'Ajuda &Tela'\n" " ShortCut = 16496\n" " OnClick = Mi_AjudaTelaClick\n" " end\n" " object Mi_HistoricoAlteracoes: TMenuItem\n" " Caption = '&Hist'#243'rico de altera'#231#245'es'\n" " Visible = False\n" " OnClick = Mi_HistoricoAlteracoesClick\n" " end\n" " end\n" " end\n" " inherited mgPopupImpressao: TmgPopupMenu\n" " Left = 4\n" " end\n" " object MnPop_Principal: TPopupMenu\n" " Left = 34\n" " Top = 36\n" " object mi_Inserir: TMenuItem\n" " Caption = '&Inserir'\n" " end\n" " object mi_Apagar: TMenuItem\n" " Caption = '&Apagar'\n" " end\n" " object mi_Editar: TMenuItem\n" " Caption = '&Editar'\n" " end\n" " object N1: TMenuItem\n" " Caption = '-'\n" " end\n" " object mi_BarradeFerramentas: TMenuItem\n" " Caption = '&Barra de Ferramentas'\n" " object mi_NaoExibir: TMenuItem\n" " Caption = '&N'#227'o Exibir'\n" " GroupIndex = 1\n" " RadioItem = True\n" " OnClick = mi_NaoExibirClick\n" " end\n" " object N2: TMenuItem\n" " Caption = '-'\n" " GroupIndex = 1\n" " RadioItem = True\n" " end\n" " object mi_Alto: TMenuItem\n" " Caption = '&Alto'\n" " GroupIndex = 1\n" " RadioItem = True\n" " OnClick = mi_AltoClick\n" " end\n" " object mi_Baixo: TMenuItem\n" " Caption = '&Baixo'\n" " GroupIndex = 1\n" " RadioItem = True\n" " OnClick = mi_BaixoClick\n" " end\n" " end\n" " object mi_BarradeStatus: TMenuItem\n" " Caption = 'Ba&rra de Status'\n" " OnClick = mi_BarradeStatusClick\n" " end\n" " end\n" "end") subst = " TMgStatusBar" result = regex.sub(subst, test_str, count=1) if result: print(result)

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