Regular Expressions 101

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  • All Tokens
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  • 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

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"\{(?:(?<!ToolTipML)[^}])+\}" test_str = (" { 66 ;3 ;Field ;\n" " ToolTipML=[ENU=Specifies the language to be used on printouts for this customer.;\n" " ENG=Specifies the language to be used on printouts for this customer.];\n" " ApplicationArea=#Basic,#Suite;\n" " SourceExpr=\"Language Code\";\n" " Importance=Additional }\n\n" " { 1000000087;3;Field ;\n" " SourceExpr=\"Created By\";\n" " Importance=Additional }\n\n" " { 1000000090;3;Field ;\n" " SourceExpr=\"Creation Date\";\n" " Importance=Additional }\n\n" " { 1000000007;3;Field ;\n" " CaptionML=[ENU=Bill-To Alert;\n" " ENG=Bill-To Alert];\n" " ToolTipML=[ENU=Illuminates when invoices are paid by another customer (the Bill-to).;\n" " ENG=Illuminates when invoices are paid by another customer (the Bill-to).];\n" " SourceExpr=BillToText;\n" " Editable=FALSE;\n" " Style=Unfavorable;\n" " StyleExpr=TRUE }\n\n" " { 1000000011;3;Field ;\n" " ToolTipML=[ENU=Default Contact for the Accounts Department, selected from the Contact List.;\n" " ENG=Default Contact for the Accounts Department, selected from the Contact List.];\n" " SourceExpr=\"Accounts Contact No.\" }\n\n" " { 1000000010;3;Field ;\n" " ToolTipML=[ENU=Specifies the accounts contact name for the customer.;\n" " ENG=Specifies the accounts contact name for the customer.];\n" " SourceExpr=\"Accounts Contact Name\" }\n\n" " { 1000000009;3;Field ;\n" " ToolTipML=[ENU=Specifies the customer's alternate telephone number. Synchronized with the Contact Card.;\n" " ENG=Specifies the customer's alternate telephone number. Synchronized with the Contact Card.];\n" " SourceExpr=\"Phone 2\";\n" " Importance=Additional }\n\n" " { 1000000008;3;Field ;\n" " ToolTipML=[ENU=Specifies the customer's alternate fax number. Synchronized with the Contact Card.;\n" " ENG=Specifies the customer's alternate fax number. Synchronized with the Contact Card.];\n" " SourceExpr=\"Fax 2\";\n" " Importance=Additional }\n\n" " { 1905885101;1;Group ;\n" " CaptionML=[ENU=Invoicing;\n" " ENG=Invoicing] }\n\n" " { 34 ;2 ;Field ;\n" " CaptionML=[ENU=Bill-to Customer;\n" " ENG=Bill-to Customer];\n" " ToolTipML=[ENU=Specifies a different customer who will be invoiced for products that you sell to the customer in the Name field on the customer card.;\n" " ENG=Specifies a different customer who will be invoiced for products that you sell to the customer in the Name field on the customer card.];\n" " ApplicationArea=#Basic,#Suite;\n" " SourceExpr=\"Bill-to Customer No.\";\n" " Importance=Additional }\n\n" " { 1000000041;2;Field ;\n" " CaptionML=[ENU=Bill-to Customer Name;\n" " ENG=Bill-to Customer Name];\n" " SourceExpr=BillToName;\n" " Importance=Promoted;\n" " Editable=FALSE }\n\n" " { 29 ;2 ;Field ;\n" " ToolTipML=[ENU=Specifies the customer's VAT registration number for customers in EU countries/regions.;\n" " ENG=Specifies the customer's VAT registration number for customers in EU countries/regions.];\n" " ApplicationArea=#Basic,#Suite;\n" " SourceExpr=\"VAT Registration No.\";\n" " OnDrillDown=VAR\n" " VATRegistrationLogMgt@1000 : Codeunit 249;\n" " BEGIN\n" " VATRegistrationLogMgt.AssistEditCustomerVATReg(Rec);\n" " END;\n" " }\n\n" " { 61 ;2 ;Field ;\n" " ToolTipML=[ENU=Specifies the customer in connection with electronic document sending.;\n" " ENG=Specifies the customer in connection with electronic document sending.];\n" " ApplicationArea=#Basic,#Suite;\n" " SourceExpr=GLN;\n" " Importance=Additional }\n\n" " { 156 ;2 ;Field ;\n" " ToolTipML=[ENU=Specifies which customer address is inserted on sales quotes that you create for the customer.;\n" " ENG=Specifies which customer address is inserted on sales quotes that you create for the customer.];\n" " ApplicationArea=#Advanced;\n" " SourceExpr=\"Copy Sell-to Addr. to Qte From\";\n" " Importance=Additional }\n\n" " { 1000000095;2;Field ;\n" " ToolTipML=[ENU=The INCO trading terms used by the customer.;\n" " ENG=The INCO trading terms used by the customer.];\n" " SourceExpr=\"Incoterms Code\" }\n\n" " { 36 ;2 ;Field ;\n" " ToolTipML=[ENU=Specifies how many copies of an invoice for the customer will be printed at a time.;\n" " ENG=Specifies how many copies of an invoice for the customer will be printed at a time.];\n" " ApplicationArea=#Basic,#Suite;\n" " SourceExpr=\"Invoice Copies\";\n" " Importance=Additional }\n\n" " { 170 ;2 ;Group ;\n" " Name=PostingDetails;\n" " CaptionML=[ENU=Posting Details;\n" " ENG=Posting Details];\n" " GroupType=Group }\n\n" " { 70 ;3 ;Field ;\n" " ToolTipML=[ENU=Specifies the customer's trade type to link transactions made for this customer with the appropriate general ledger account according to the general posting setup.;\n" " ENG=Specifies the customer's trade type to link transactions made for this customer with the appropriate general ledger account according to the general posting setup.];\n" " ApplicationArea=#Basic,#Suite;\n" " SourceExpr=\"Gen. Bus. Posting Group\";\n" " Importance=Promoted;\n" " ShowMandatory=TRUE }\n\n" " { 58 ;3 ;Field ;\n" " ToolTipML=[ENU=Specifies the customer's VAT specification to link transactions made for this customer to.;\n" " ENG=Specifies the customer's VAT specification to link transactions made for this customer to.];\n" " ApplicationArea=#Basic,#Suite;\n" " SourceExpr=\"VAT Bus. Posting Group\";\n" " Importance=Additional }\n\n" " { 38 ;3 ;Field ;\n" " ToolTipML=[ENU=Specifies the customer's market type to link business transactions to.;\n" " ENG=Specifies the customer's market type to link business transactions to.];\n" " ApplicationArea=#Basic,#Suite;\n" " SourceExpr=\"Customer Posting Group\";\n" " Importance=Promoted;\n" " ShowMandatory=TRUE }\n\n" " { 68 ;2 ;Group ;\n" " Name=PricesandDiscounts;\n" " CaptionML=[ENU=Prices and Discounts;\n" " ENG=Prices and Discounts];\n" " GroupType=Group }\n\n" " { 1000000015;3;Field ;\n" " ToolTipML=[ENU=Specifies whether the customer is a member of a Buying Group.;\n" " ENG=Specifies whether the customer is a member of a Buying Group.];\n" " SourceExpr=\"Buying Group Code\" }\n\n" " { 40 ;3 ;Field ;\n" " ToolTipML=[ENU=Specifies the customer price group code, which you can use to set up special sales prices in the Sales Prices window.;\n" " ENG=Specifies the customer price group code, which you can use to set up special sales prices in the Sales Prices window.];\n" " ApplicationArea=#Basic,#Suite;\n" " SourceExpr=\"Customer Price Group\";\n" " Importance=Promoted }\n\n" " { 44 ;3 ;Field ;\n" " ToolTipML=[ENU=Specifies the customer discount group code, which you can use as a criterion to set up special discounts in the Sales Line Discounts window.;\n" " ENG=Specifies the customer discount group code, which you can use as a criterion to set up special discounts in the Sales Line Discounts window.];\n" " ApplicationArea=#Basic,#Suite;\n" " SourceExpr=\"Customer Disc. Group\";\n" " Importance=Promoted }\n\n" " { 46 ;3 ;Field ;\n" " ToolTipML=[ENU=Specifies if a sales line discount is calculated when a special sales price is offered according to setup in the Sales Prices window.;\n" " ENG=Specifies if a sales line discount is calculated when a special sales price is offered according to setup in the Sales Prices window.];\n" " ApplicationArea=#Basic,#Suite;\n" " SourceExpr=\"Allow Line Disc.\";\n" " Importance=Additional }\n\n" " { 1000000016;3;Field ;\n" " ToolTipML=[ENU=Allows Break Quantity discounts for an Assortment (or Basket) of Items. If a Total Quantity of a defined Item Discount Group is purchased then a Discount applies.;\n" " ENG=Allows Break Quantity discounts for an Assortment (or Basket) of Items. If a Total Quantity of a defined Item Discount Group is purchased then a Discount applies.];\n" " SourceExpr=\"Allow Assorted Discount\" }\n\n" " { 42 ;3 ;Field ;\n" " ToolTipML=[ENU=Specifies a code for the invoice discount terms that you have defined for the customer.;\n" " ENG=Specifies a code for the invoice discount terms that you have defined for the customer.];\n" " ApplicationArea=#Basic,#Suite;\n" " NotBlank=Yes;\n" " SourceExpr=\"Invoice Disc. Code\";\n" " Importance=Additional }\n\n" " { 129 ;3 ;Field ;\n" " ToolTipML=[ENU=Specifies if the Unit Price and Line Amount fields on document lines should be shown with or without VAT.;\n" " ENG=Specifies if the Unit Price and Line Amount fields on document lines should be shown with or without VAT.];\n" " ApplicationArea=#Basic,#Suite;\n" " SourceExpr=\"Prices Including VAT\";\n" " Importance=Additional }\n\n" " { 1901677601;1;Group ;\n" " CaptionML=[ENU=Payments;\n" " ENG=Payments] }\n\n" " { 160 ;2 ;Field ;\n" " ToolTipML=[ENU=Specifies a prepayment percentage that applies to all orders for this customer, regardless of the items or services on the order lines.;\n" " ENG=Specifies a prepayment percentage that applies to all orders for this customer, regardless of the items or services on the order lines.];\n" " ApplicationArea=#Prepayments;\n" " SourceExpr=\"Prepayment %\";\n" " Importance=Additional }\n\n" " { 48 ;2 ;Field ;\n" " ToolTipML=[ENU=Specifies how to apply payments to entries for this customer.;\n" " ENG=Specifies how to apply payments to entries for this customer.];\n" " ApplicationArea=#Basic,#Suite;\n" " SourceExpr=\"Application Method\";\n" " Importance=Additional }\n\n" " { 21 ;2 ;Field ;\n" " ToolTipML=[ENU=Specifies for direct debit collections if the customer that the payment is collected from is a person or a company.;\n" " ENG=Specifies for direct debit collections if the customer that the payment is collected from is a person or a company.];\n" " ApplicationArea=#Basic,#Suite;\n" " SourceExpr=\"Partner Type\";\n" " Importance=Additional }\n\n" " { 50 ;2 ;Field ;\n" " ToolTipML=[ENU=Specifies a code that indicates the payment terms that you require of the customer.;\n" " ENG=Specifies a code that indicates the payment terms that you require of the customer.];\n" " ApplicationArea=#Basic,#Suite;\n" " SourceExpr=\"Payment Terms Code\";\n" " Importance=Promoted;\n" " ShowMandatory=TRUE }\n\n" " { 1000000018;2;Field ;\n" " ToolTipML=[ENU=Date Formula. Overrides default Grace Period Calculation. Populated from Payment Terms.;\n" " ENG=Date Formula. Overrides default Grace Period Calculation. Populated from Payment Terms.];\n" " SourceExpr=\"Grace Period Calculation\" }\n\n" " { 11 ;2 ;Field ;\n" " ToolTipML=[ENU=Specifies how the customer usually submits payment, such as bank transfer or check.;\n" " ENG=Specifies how the customer usually submits payment, such as bank transfer or cheque.];\n" " ApplicationArea=#Basic,#Suite;\n" " SourceExpr=\"Payment Method Code\";\n" " Importance=Additional }\n\n" " { 15 ;2 ;Field ;\n" " ToolTipML=[ENU=Specifies how reminders about late payments are handled for this customer.;\n" " ENG=Specifies how reminders about late payments are handled for this customer.];\n" " ApplicationArea=#Advanced;\n" " SourceExpr=\"Reminder Terms Code\";\n" " Importance=Additional }\n\n" " { 52 ;2 ;Field ;\n" " ToolTipML=[ENU=Specifies finance charges are calculated for the customer.;\n" " ENG=Specifies finance charges are calculated for the customer.];\n" " ApplicationArea=#Advanced;\n" " SourceExpr=\"Fin. Charge Terms Code\";") matches = re.finditer(regex, test_str, re.MULTILINE) 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