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"(var.*=)\s+(([\{\[][\n\r]+[\S\s]*?[\r\n]+[\}\]]([\r\n]+|\Z))|([^\n\r]*))", flags=re.MULTILINE | re.IGNORECASE) test_str = ("var testmultiline = {\n" " fizz = {\n" " buzz = \"moo\"\n" " }\n" " buzz = {\n" " buzz = \"moo\"\n" " }\n" "}\n\n\n" "var test2 = null\n\n" "var test3 = { still single line }\n\n" "var randomportraits = load(globals.modfolder + \"/randomportraits/randomportraits.gd\").new()\n\n" "<AddTo 0>\n" "var races = {\n" "HumanTest = {\n" " skin = ['pale', 'fair', 'olive', 'tan'],\n" " eyecolor = ['blue', 'green', 'brown', 'hazel', 'black', 'gray'],\n" " haircolor = ['blond', 'red', 'auburn', 'brown', 'black'],\n" " surname = names.humansurname,\n" " description = \"Humans are a highly successful militaristic people whose members can be found throughout much of the world, their presence often receiving a mixed reception. Slavery is a common part of human society, viewed as a civilized form of alternative punishment, with many laws and businesses based around the concept. Because of this slave driven culture, you have found that humans tend to be the most widely accessible residents, servants, and slaves.\",\n" " details = \"[color=aqua]Racial trait: Punishment expectations and praise lasts twice as long.[/color]\\n\\n[color=yellow]Stat potential: Strength - 5, Agility - 3, Magic - 2, Endurance - 4 [/color]\",\n" " stats = {str_max = 5, \n" " agi_max = 3, \n" " maf_max = 2, \n" " end_max = 4}\n" "},\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