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
No Match

r"
"
gs

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"Card number:\s(\d+\*+\d+)(?:(?!Card number:).)*?ID:\s*(\d*)(?:(?:(?!Card number:).)*?Total cash dispensed:\s*([a-zA-Z0-9]+)\s+([a-zA-Z0-9]+))?" test_str = ("Card number: 99280*********8823, SEQ: 182\n" "Current session ID: 182\n" "21/01/2021 08:46:49 : Selected language : French\n" "21/01/2021 08:46:49 : Chip application : NO Active \n" " 21/01/2021 09:53:03 : Returned code : 0\n" " 21/01/2021 09:53:03 : Pin entered\n" " 21/01/2021 09:53:09 : Transaction selected: FastCash 40000 on ATM: Y6154514\n" " 21/01/2021 09:53:10 : Returned code : 0\n" "21/01/2021 09:53:13 : FastCash Authorization requested\n" "!XXXXXXXXXXXXXXX3947#20210121065319#686817#0001969C0007469460900002969C000740946090#\n" "21/01/2021 09:53:14 : FastCash Authorized\n" "Returned code : 0, STAN: 686817\n" "21/01/2021 09:53:27 : Cash dispensed\n" "21/01/2021 09:53:28 : Card ejected\n" "21/01/2021 09:53:29 : Card taken\n" "21/01/2021 09:53:32 : Dispense details:\n" "->cass 1: 0 x 5000 MGA, cass 2: 4 x 10000 MGA\n" "->cass 3: 0 x 10000 MGA, cass 4: 0 x 20000 MGA\n" "------->Total cash dispensed: 40000 MGA\n" "21/01/2021 09:53:32 : Cash presented\n" "21/01/2021 09:53:32 : Waiting for cash to be taken\n" "21/01/2021 09:53:33 : Cash taken\n" "21/01/2021 09:53:39 : Transaction completed\n" " 21/01/2021 09:53:41 : Session terminated\n" " Card number: 6700*********8823, SEQ: 177\n" "Current session ID: 177\n" "21/01/2021 10:04:06 : Selected language : French\n" "21/01/2021 10:04:06 : Chip application : A0000000031010\n" " 21/01/2021 10:04:53 : Returned code : 0\n" " 21/01/2021 10:04:54 : Pin entered\n" " 21/01/2021 10:05:03 : Transaction selected: BalanceInquiry on ATM: Y892614\n" " 21/01/2021 10:05:04 : Returned code : 0\n" "21/01/2021 10:05:09 : BalanceInquiry Authorization requested\n" "!XXXXXXXXXXXX8727#20210121070516#686824\n" " 21/01/2021 10:05:10 : BalanceInquiry Authorized \n" " Returned code : 0, STAN: 686824\n" "21/01/2021 10:05:11 : Chip Authorization approved\n" "21/01/2021 10:05:18 : Transaction completed\n" " 21/01/2021 10:05:38 : Transaction selected: Statement on ATM: Y892614\n" "21/01/2021 10:05:43 : Statement Authorization requested\n" "!XXXXXXXXXXXX8727#20210121070550#686825#\n" "21/01/2021 10:05:44 : Statement Authorized\n" "Returned code : 0, Auth: 686825\n" "21/01/2021 10:05:45 : Chip authorization declined\n" " 21/01/2021 10:06:00 : Card ejected\n" " 21/01/2021 10:06:01 : Card taken\n" " 21/01/2021 10:06:03 : Session terminated\n" " Card number: 99280*********8823, SEQ: 182\n" "Current session ID: 182\n" "21/01/2021 08:46:49 : Selected language : French\n" "21/01/2021 08:46:49 : Chip application : NO Active \n" " 21/01/2021 09:53:03 : Returned code : 0\n" " 21/01/2021 09:53:03 : Pin entered\n" " 21/01/2021 09:53:09 : Transaction selected: FastCash 40000 on ATM: Y6154514\n" " 21/01/2021 09:53:10 : Returned code : 0\n" "21/01/2021 09:53:13 : FastCash Authorization requested\n" "!XXXXXXXXXXXXXXX3947#20210121065319#686817#0001969C0007469460900002969C000740946090#\n" "21/01/2021 09:53:14 : FastCash Authorized\n" "Returned code : 0, STAN: 686817\n" "21/01/2021 09:53:27 : Cash dispensed\n" "21/01/2021 09:53:28 : Card ejected\n" "21/01/2021 09:53:29 : Card taken\n" "21/01/2021 09:53:32 : Dispense details:\n" "->cass 1: 0 x 5000 MGA, cass 2: 4 x 10000 MGA\n" "->cass 3: 0 x 10000 MGA, cass 4: 0 x 20000 MGA\n" "------->Total cash dispensed: 40000 MGA\n" "21/01/2021 09:53:32 : Cash presented\n" "21/01/2021 09:53:32 : Waiting for cash to be taken\n" "21/01/2021 09:53:33 : Cash taken\n" "21/01/2021 09:53:39 : Transaction completed\n" " 21/01/2021 09:53:41 : Session terminated") matches = re.finditer(regex, test_str, re.DOTALL) 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