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 single character of: a, b, c or d
    [[ab][cd]]
  • 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]
  • Character class intersection
    [\w&&[^\d]]
  • 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"(\w+)=((?=\{)(?:(?=.*?\{(?!.*?\3)(.*\}(?!.*\4).*))(?=.*?\}(?!.*?\4)(.*)).)+?.*?(?=\3)[^{]*(?=\4$)|\"{2}(.*?)\"{2}|(\S+))" test_str = ("DC696,\"/xi/ajax/remoting/call/plaincall/adhocReportBuilderControllerProxy.getRortList.dwr\",\"2222-11-10 08:32:22,351 PLV=REQ CIP=9.9.9.7 CMID=syairp CMN=\"\"Dub Airport Corporation Limited\"\" SN=sfv4_APM180885. DPN=dbPool66HFT01 UID=3862D04108 UN=91F6025D47F01D IUID=1931 LOC=en_GB EID=\"\"EVENT-UNKNOWN-UNKNOWN-ob55abe0118-201110083217-396080\"\" AGN=\"\"[Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36 Edg/107.0.1418.35]\"\" RID=REQ-[7274545] MTD=POST URL=\"\"/xi/ajax/remoting/call/plaincall/adhocRrtBuilderCoollerProxy.getRtList.dwr\"\" RQT=2835 MID=ADIN PID=ADMIN PQ=ADIN_PAGE SUB=0 MEM=2331036 CPU=2410 UCPU=2300 SCPU=110 FRE=10 FWR=0 NRE=2281 NWR=218 SQLC=43 SQLT=142 RPS=200 SID=60826A3FAB005A8A9B930177C5******.pc6bc1029 GID=e262dde6d0e040070b58afd4c8 HSID=ddc665538db779508d3213c0bb63bcb1c49fe8236d5f0884ae975915728e61 CSL=CRITICAL CCON=0 CSUP=0 CLOC=0 CEXT=0 CREM=0 STK={\"\"n\"\":\"\"/xi/ajax/remoting/call/plaincall/adhocReportBuilderControllerProxy.getrtList.dwr\"\",\"\"i\"\":1,\"\"t\"\":2835,\"\"slft\"\":2679,\"\"sub\"\":[{\"\"n\"\":\"\"SQL:select * from sfv4_HOUA180885.REPORT_DEF WHERE REPORT_DEF_ID IN (SELECT REPORT_DEF_ID FROM sfv4_HA80885.REPORT_DTASET WHERE REPORT_ID=?) AND DELETED=? ORDER BY REPORT_DEF_ID asc NULLS LAST\"\",\"\"i\"\":17,\"\"t\"\":40,\"\"slft\"\":40,\"\"st\"\":337,\"\"m\"\":220958,\"\"nr\"\":154,\"\"rt\"\":0,\"\"rn\"\":22,\"\"fs\"\":0}]} \",\"2022-11-09T21:32:22.351+0000\",p66cf1029,\"dc606_ss_application\",1,\"/app/tomcat/logs/pef.log\",\"perf_log_yxx\",swsskix13\n" "DC696,\"/xi/ajax/remoting/call/plaincall/adhocReportBuilderControllerProxy.getRortList.dwr\",\"2222-11-10 08 - 32") 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