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

Substitution
Processing...

Code Generator

Language

Generated Code

import re regex = re.compile(r"^.+version(.*) character file\.([\n\r]+)(\d+)([^\(]+) \([^\d]+( \d+),.+\n\s+.+as a(.+) on.+\n\s+(?:Was.+One\.\n)?((?:.|\n)+[!.])\n(?:.|\n)+\((\d+)(?:.|\n)+$") test_str = (" Dungeon Crawl Stone Soup version 0.16-a0-3667-g690a316 (webtiles) character file.\n\n" "462 8Escape the Ruffian (level 6, -2/47 HPs)\n" " Began as a Bearkin Transmuter on Jan 31, 2015.\n" " Slain by an orc\n" " ... wielding a +0 trident\n" " (3 damage)\n" " ... on level 4 of the Dungeon.\n" " The game lasted 00:28:53 (3698 turns).\n\n" "8Escape the Ruffian (Bearkin Transmuter) Turns: 3698, Time: 00:28:53") subst = "Version:$1\\nScore: $3\\nName:$4\\nCharacter:$6\\nLevel:$5\\nCause of Death/Victory: $7\\nTurns: $8" result = regex.sub(subst, test_str, count=1) if result: print(result)

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