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

~
~
gm

Test String

Substitution

Processing...

Code Generator

Language

Generated Code

#include <MsgBoxConstants.au3> ; to declare the Constants of MsgBox Local $sRegex = "(?m)^.*?::(.*?(pass|fail).*)" Local $sString = "" & @CRLF & _ "tests/test_pytest_fold.py::test_1_passes_and_has_logging_output" & @CRLF & _ "" & @CRLF & _ "------------------------------------------------------------------ live log setup ------------------------------------------------------------------" & @CRLF & _ "" & @CRLF & _ "INFO root:test_pytest_fold.py:52 Running test tests.test_pytest_fold..." & @CRLF & _ "" & @CRLF & _ "INFO root:test_pytest_fold.py:53 Setting test up..." & @CRLF & _ "" & @CRLF & _ "INFO root:test_pytest_fold.py:54 Executing test..." & @CRLF & _ "" & @CRLF & _ "INFO root:test_pytest_fold.py:56 Tearing test down..." & @CRLF & _ "" & @CRLF & _ "------------------------------------------------------------------ live log call -------------------------------------------------------------------" & @CRLF & _ "" & @CRLF & _ "CRITICAL root:test_pytest_fold.py:63 Live military happy. View water one land until interesting leader." & @CRLF & _ "" & @CRLF & _ "ERROR root:test_pytest_fold.py:64 Kid expert show cost. Point daughter team attorney keep improve serve." & @CRLF & _ "" & @CRLF & _ "WARNING root:test_pytest_fold.py:65 Arm paper write guess close modern." & @CRLF & _ "" & @CRLF & _ "INFO root:test_pytest_fold.py:66 Recently each rich." & @CRLF & _ "" & @CRLF & _ "DEBUG root:test_pytest_fold.py:67 Attack also do far pressure address hot." & @CRLF & _ "" & @CRLF & _ "PASSED [ 31%]" & @CRLF & _ "" & @CRLF & _ "tests/test_pytest_fold.py::test_2_fails_and_has_logging_output" & @CRLF & _ "" & @CRLF & _ "------------------------------------------------------------------ live log setup ------------------------------------------------------------------" & @CRLF & _ "" & @CRLF & _ "INFO root:test_pytest_fold.py:52 Running test tests.test_pytest_fold..." & @CRLF & _ "" & @CRLF & _ "INFO root:test_pytest_fold.py:53 Setting test up..." & @CRLF & _ "" & @CRLF & _ "INFO root:test_pytest_fold.py:54 Executing test..." & @CRLF & _ "" & @CRLF & _ "INFO root:test_pytest_fold.py:56 Tearing test down..." & @CRLF & _ "" & @CRLF & _ "------------------------------------------------------------------ live log call -------------------------------------------------------------------" & @CRLF & _ "" & @CRLF & _ "CRITICAL root:test_pytest_fold.py:72 Paper such fund find international occur good deal." & @CRLF & _ "" & @CRLF & _ "ERROR root:test_pytest_fold.py:73 Today type which situation people nation develop." & @CRLF & _ "" & @CRLF & _ "WARNING root:test_pytest_fold.py:74 Rich key set point answer. Sing Republican continue bar however hundred." & @CRLF & _ "" & @CRLF & _ "INFO root:test_pytest_fold.py:75 Work level century myself piece. Share news no husband cold. Half up send board than current." & @CRLF & _ "" & @CRLF & _ "DEBUG root:test_pytest_fold.py:76 Require matter impact speech left to." & @CRLF & _ "" & @CRLF & _ "FAILED [ 34%]" & @CRLF & _ "" & @CRLF & _ "This is giving me a lot of trouble. I've been digging into the more advanced aspects of regex (lookarounds, and more esoteric matching symbols like \v), but so far my teammates and I haven't come up with anything workable." & @CRLF & _ "" & @CRLF & _ "Anyone care to take a stab at it? For the above second code example, I want to match so that I get the following (testname and its outcome):" & @CRLF & _ "" & @CRLF & _ "test_1_passes_and_has_logging_output PASSED" & @CRLF & _ "test_2_fails_and_has_logging_output FAILED" Local $sSubst = "\1 \U\2ED" Local $sResult = StringRegExpReplace($sString, $sRegex, $sSubst) MsgBox($MB_SYSTEMMODAL, "Result", $sResult)

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 AutoIt, please visit: https://www.autoitscript.com/autoit3/docs/functions/StringRegExp.htm