Regular Expressions 101

Save & Manage Regex

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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"(inherited )(MgSpeedButton1)(:[ ]TMgSpeedButton)", flags=re.IGNORECASE | re.DOTALL | re.MULTILINE) test_str = ("inherited FormOrganizacaoUsuario: TFormOrganizacaoUsuario\n" " Left = 208\n" " Top = 179\n" " Caption = 'Organiza'#231#227'o'\n" " ClientHeight = 435\n" " ClientWidth = 614\n" " ExplicitWidth = 630\n" " ExplicitHeight = 474\n" " PixelsPerInch = 96\n" " TextHeight = 15\n" " inherited Bv_Top: TBevel\n" " Width = 614\n" " ExplicitTop = 59\n" " ExplicitWidth = 628\n" " end\n" " inherited Sb_FormPadrao: TStatusBar\n" " Top = 410\n" " Width = 614\n" " ExplicitTop = 410\n" " ExplicitWidth = 628\n" " end\n" " inherited Pn_BaseToolBar: TPanel\n" " Width = 614\n" " Caption = 'Pn_BaseToolBar'\n" " TabOrder = 4\n" " ExplicitWidth = 628\n" " inherited Panel1: TPanel\n" " Left = 532\n" " ExplicitLeft = 546\n" " inherited Sb_Procurar: TMgBitBtn\n" " LookAndFeel.SkinName = ''\n" " end\n" " end\n" " inherited Pn_Aux2: TPanel\n" " Width = 1\n" " ExplicitWidth = 15\n" " end\n" " inherited Pn_Historico: TPanel\n" " Left = 502\n" " ExplicitLeft = 516\n" " inherited Bo_Historico: TMgSpeedButton\n" " LookAndFeel.SkinName = ''\n" " end\n" " end\n" " inherited Pn_AuxR: TmgPanel\n" " Left = 499\n" " BevelOuter = bvNone\n" " ExplicitLeft = 834\n" " ExplicitTop = -3\n" " end\n" " end\n" " inherited Pn_BaseGrid: TPanel\n" " Width = 614\n" " Height = 351\n" " ExplicitWidth = 628\n" " ExplicitHeight = 351\n" " inherited SplitterZoom: TMgSplitter\n" " Top = 323\n" " Width = 608\n" " ExplicitLeft = 3\n" " ExplicitTop = 283\n" " ExplicitWidth = 621\n" " end\n" " inherited Pc_Grid: TmgExtPageControl\n" " Width = 608\n" " Height = 320\n" " ExplicitWidth = 622\n" " ExplicitHeight = 320\n" " inherited Ts_Grid: TTabSheet\n" " Caption = 'Organiza'#231#227'o'\n" " ExplicitWidth = 614\n" " ExplicitHeight = 287\n" " object Tv_Organizacao: TmgTvExplorer\n" " Left = 0\n" " Top = 0\n" " Width = 600\n" " Height = 287\n" " Images = Il_Small\n" " DataSource = DM_Seguranca.Ds_Usuario_Org_\n" " FieldPK = 'ORG_IN_CODIGO'\n" " OnMontaLinha = Tv_OrganizacaoMontaLinha\n" " OnDblClick = Bo_SelecionaClick\n" " OnmgAddNode = Tv_OrganizacaomgAddNode\n" " Align = alClient\n" " Alignment = taLeftJustify\n" " BevelOuter = bvNone\n" " ParentColor = True\n" " ParentShowHint = False\n" " ShowHint = True\n" " TabOrder = 0\n" " ExplicitWidth = 614\n" " end\n" " end\n" " inherited Ts_Filtro: TTabSheet\n" " ExplicitWidth = 931\n" " ExplicitHeight = 287\n" " inherited Gd_Filtro: TMgDBGrid\n" " Width = 600\n" " Height = 287\n" " Font.Color = clBlack\n" " Font.Height = -13\n" " Font.Name = 'Calibri'\n" " ExplicitWidth = 931\n" " ExplicitHeight = 287\n" " end\n" " end\n" " end\n" " inherited Pn_Zoom: TmgPanel\n" " Top = 323\n" " Width = 608\n" " ExplicitTop = 323\n" " ExplicitWidth = 622\n" " end\n" " inherited Pn_Protegido: TmgPanel\n" " Top = 328\n" " Width = 608\n" " ExplicitTop = 328\n" " ExplicitWidth = 622\n" " inherited Lb_Leganda: TmgLabel\n" " Height = 15\n" " ParentFont = True\n" " ExplicitHeight = 15\n" " end\n" " end\n" " end\n" " inherited Pn_BaseTreeView: TPanel\n" " Height = 351\n" " TabOrder = 0\n" " ExplicitHeight = 351\n" " end\n" " inherited Pn_BaseBotoes: Tc_PanelExpert\n" " Width = 608\n" " ExplicitWidth = 622\n" " inherited Pn_BaseBotoesAux: TPanel\n" " Width = 437\n" " ExplicitWidth = 451\n" " inherited Bo_Refresh: TMgSpeedButton\n" " ExplicitLeft = 143\n" " end\n" " inherited Bo_Adicionar: TMgSpeedButton\n" " ExplicitLeft = 469\n" " end\n" " inherited Bo_Remover: TMgSpeedButton\n" " ExplicitLeft = 433\n" " end\n" " inherited Bo_Propriedades: TMgSpeedButton\n" " LookAndFeel.SkinName = ''\n" " end\n" " inherited Bo_Fechar: TMgSpeedButton\n" " Left = 760\n" " Width = 59\n" " ParentFont = False\n" " ExplicitLeft = 630\n" " ExplicitWidth = 59\n" " end\n" " inherited Bo_Prev: TmgDBBtn\n" " ExplicitLeft = 131\n" " end\n" " inherited Bo_Next: TmgDBBtn\n" " ExplicitLeft = 199\n" " end\n" " inherited Bo_Last: TmgDBBtn\n" " ExplicitLeft = 263\n" " ExplicitTop = 6\n" " end\n" " inherited MgSpeedButton1: TMgSpeedButton\n" " TabOrder = 11\n" " ExplicitLeft = 617\n" " end\n" " object Bo_Seleciona: TMgSpeedButton\n" " AlignWithMargins = True\n" " Left = 694\n" " Top = 3\n" " Width = 60\n" " Height = 25\n" " Cursor = crHandPoint\n" " Align = alLeft\n" " Caption = '&Seleciona'\n" " Font.Charset = DEFAULT_CHARSET\n" " Font.Color = clWindowText\n" " Font.Height = -12\n" " Font.Name = 'MS Sans Serif'\n" " Font.Style = []\n" " ParentFont = False\n" " ParentShowHint = True\n" " TabOrder = 10\n" " OnClick = Bo_SelecionaClick\n" " Layout = blGlyphTop\n" " Spacing = 6\n" " Colors.Default = 13675044\n" " Colors.DefaultText = clWhite\n" " Colors.Normal = 13675044\n" " Colors.NormalText = clWhite\n" " Colors.Hot = 9724187\n" " Colors.HotText = clWhite\n" " Colors.Pressed = 9724187\n" " Colors.PressedText = clWhite\n" " Colors.Disabled = clWhite\n" " Colors.DisabledText = 10526880\n" " SpeedButtonOptions.CanBeFocused = False\n" " SpeedButtonOptions.Flat = True\n" " DropdownArrow = False\n" " DropdownArrowWidth = 7\n" " Flat = False\n" " HighlightWhenDown = False\n" " Opaque = False\n" " RepeatDelay = 0\n" " RepeatInterval = 0\n" " MgImagem = siOk\n" " ExplicitLeft = 630\n" " end\n" " end\n" " end\n" " inherited Pn_BasePesquisa: TmgPanel\n" " Left = 91\n" " end\n" " inherited Mn_Principal: TMainMenu\n" " inherited miTabela: TMenuItem\n" " Caption = '&Organiza'#231#245'es'\n" " end\n" " inherited miExibir: TMenuItem\n" " inherited miAtualizar: TMenuItem\n" " OnClick = nil\n" " end\n" " end\n" " end\n" " inherited mgPopupImpressao: TmgPopupMenu\n" " Left = 110\n" " Top = 132\n" " end\n" " inherited MnPop_Principal: TPopupMenu\n" " inherited mi_Atualizar: TMenuItem\n" " OnClick = nil\n" " end\n" " end\n" " inherited Im_Protegido: TmgImageList\n" " Bitmap = {\n" " 494C0101010004006C0010001000FFFFFFFFFF10FFFFFFFFFFFFFFFF424D3600\n" " 0000000000003600000028000000400000001000000001002000000000000010\n" " 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end\n" "end") subst = "\\1Bo_Help\\3" result = regex.sub(subst, test_str) 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