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"(?ms)<PNR>([\w]+)<\/PNR>\n")) test_str = ("<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>\n" "<EGE_Booking>\n" " <TripID>1004-3637-360</TripID>\n" " <RecordLocator>1004-3637-360</RecordLocator>\n" " <Travelers>\n" " <Traveler>\n" " <PerCode>13593199</PerCode>\n" " <FirstName>Claude</FirstName>\n" " <LastName>Christensson</LastName>\n" " <ContactDetails>\n" " <Email>claude.christensson@wirelesscar.com</Email>\n" " <MobilePhone>46765537005</MobilePhone>\n" " </ContactDetails>\n" " <TravellerCostCenter>\n" " <CostCenter Code=\"CC3\">\n" " <Label>Employee ID</Label>\n" " <Value>56524</Value>\n" " </CostCenter>\n" " <CostCenter Code=\"CC4\">\n" " <Label>Global Department code</Label>\n" " <Value>DI43400</Value>\n" " </CostCenter>\n" " </TravellerCostCenter>\n" " </Traveler>\n" " </Travelers>\n" " <Segments>\n" " <HotelSegment>\n" " <HOTEL>\n" " <TripItemID>5a7dc8f971ac0163f7563e7e</TripItemID>\n" " <PNR>ABC1DS</PNR>\n" " <Status>V</Status>\n" " <CheckInDate>2018-02-13</CheckInDate>\n" " <CheckOutDate>2018-02-14</CheckOutDate>\n" " <Vendor SupplierType=\"11281422\">Genting Hotel</Vendor>\n" " <PropertyName>Genting Hotel</PropertyName>\n" " <Location>\n" " <Name>Pendigo Way, England, B40 1PU</Name>\n" " <City>Birmingham</City>\n" " <Country Code=\"GBR\">Storbritannien</Country>\n" " </Location>\n" " <ConfirmationCode>982674693</ConfirmationCode>\n" " <Cost>\n" " <Amount>751.08</Amount>\n" " <Currency Code=\"SEK\">Swedish Krona</Currency>\n" " </Cost>\n" " <OutOfPolicyReasons/>\n" " </HOTEL>\n" " <HOTEL>\n" " <TripItemID>5a7dc8f971ac0163f7563e7e</TripItemID>\n" " <PNR>55545261643</PNR>\n" " <Status>V</Status>\n" " <CheckInDate>2018-02-13</CheckInDate>\n" " <CheckOutDate>2018-02-14</CheckOutDate>\n" " <Vendor SupplierType=\"11281422\">Genting Hotel</Vendor>\n" " <PropertyName>Genting Hotel</PropertyName>\n" " <Location>\n" " <Name>Pendigo Way, England, B40 1PU</Name>\n" " <City>Birmingham</City>\n" " <Country Code=\"GBR\">Storbritannien</Country>\n" " </Location>\n" " <ConfirmationCode>982674693</ConfirmationCode>\n" " <Cost>\n" " <Amount>751.08</Amount>\n" " <Currency Code=\"SEK\">Swedish Krona</Currency>\n" " </Cost>\n" " <OutOfPolicyReasons/>\n" " </HOTEL>\n" " </HotelSegment>\n" " </Segments>\n" " <Invoicing>\n" " <CompanyCode>28781</CompanyCode>\n" " <ClientNumber>28781</ClientNumber>\n" " <ClientRequisition>claude.christensson@wirelesscar.com</ClientRequisition>\n" " <ClientReference>689100277</ClientReference>\n" " <ClientCostCenter>\n" " <CostCenter Code=\"CC1\">\n" " <Label>Legal Entity</Label>\n" " <Value>WirelessCar Sweden AB</Value>\n" " </CostCenter>\n" " <CostCenter Code=\"CC2\">\n" " <Label>Cost Center</Label>\n" " <Value>989502</Value>\n" " </CostCenter>\n" " </ClientCostCenter>\n" " </Invoicing>\n" "</EGE_Booking>\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