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"^(?P<meta1s>(?:\[[^\]]+\])*)(?P<name>.+(?=\[))(?P<ep>(?:\[(?:(?:NC)?(?:OP|ED|SP(?:\d{2})?)\])|\[(?:\d{2}(?:(?:\.\d+)?(?:_v\d+)?)?)\]))(?P<metas>(?:\[[^\]]+\])*)(?P<others>(?:.*?))(?P<ext>\.(?:mkv|mp4|srt|ass))$", flags=re.MULTILINE | re.UNICODE) test_str = ("[VCB-Studio] Sword Art Online Alicization War of Underworld [11][Ma10p_1080p][x265_flac].mkv\n" "[UHA-WINGS＆RATH][Sword Art Online - Alicization -War of Underworld-][11][BDRIP 1920x1080 HEVC-YUV420P10 FLAC].sc.ass\n" "[Nekomoe kissaten][Do It Yourself!!][04][1080p][JPSC].mp4\n" "[UHA-WINGS&VCB-Studio] Kobayashi-san Chi no Meidoragon S [NCOP][Ma10p_1080p][x265_flac].mkv\n" "[Hakugetsu&VCB-Studio] No Game No Life [SP03][Hi10p_1080p][x264_flac].mkv\n\n" "(UHA-SGNIW) NoSQL [SP06] the anime [loolol] (LLLKKK) [SP99] ilikexd [speranza].mkv") subst = "\\g<meta1s>\\g<name>\\g<ep>\\g<metas>[SOX Edition]\\g<others>\\g<ext>" result = regex.sub(subst, test_str) 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