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"failed:.*\,", flags=re.MULTILINE | re.IGNORECASE) test_str = ("{Client:100.96.43.15,ElapsedMilliseconds:214,EndTime:2019-10-02T20:18:56.027320,Failed:0,Name:MasterAddress,Results:[{ElapsedMilliseconds:213,EndTime:2019-10-02T20:18:56.027291,Result:{AddressTypeCode:STANDARD,ID:00A-27P-15Q,Municipality:{Name:Windsor,StateProvince:{Code:ON,Country:{Code:CA}}},PostalCode:{Value:N8S0A1},Street:{Name:McHugh,StreetType:{Abbreviation:{en:St,fr:St},Value:{en:Street,fr:Street}}},StreetNumber:8787},StartTime:2019-10-02T20:18:55.813313,Success:true}],Server:master-address-68bf54d578-vczph,StartTime:2019-10-02T20:18:55.813162,StatusCode:200,Succeeded:1,TimedOut:0,Version:1.0}\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