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"^(?<title>.+?)[_.\s-]+(?<season>S\d+)(?:[.\-\s_]*?(?<seasonmax>S?\d+))?(?=[_.\s](?!E\d+))", flags=re.IGNORECASE | re.MULTILINE) test_str = ("daily.show.name.2023.04.18.guest.name.1080p.web.h264-jebaited.mkv\n" "BBC.News.at.Ten.2023.10.11.1080i.HDTV.DD2.0.H.264-BLS\n" "WWE.NXT.2023.10.10.720p.WEB.h264-SPORTSNET\n" "Tesco.How.Do.They.Really.Do.It.2023.1080p.HDTV.H264-DARKFLiX\n" "Seth.Meyers.2023.10.09.Amy.Sedaris.1080p.WEB.h264-EDITH\n" "NFL.2023.10.09.49ers.Vs.Cowboys.UNCUT.1080p.WEB.H264-SPORTSNET\n" "Neighbours.S39E012.2023-10-05.Episode.8915.1080p.AMZN.WEB-DL.DDP2.0.H.264-SDCC \n" "DFL.Supercup.2023 08 12.Bayern.Munchen.vs.RB.Leipzig.HDTV.2160p.AAC2.0.HEVC.mkv\n" "The Late Show with Stephen Colbert (2015) - 2023-10-05 - Bob Odenkirk Fortune Feimster [2.0 WEBDL-1080p][x264]-EDITH.mkv\n" "Anger Management (2012) - S02E15 - Charlies Patients Hook Up [WEBDL-1080p][AC3 5.1][h264]-BS.mkv\n" "Ahsoka (2023) - S01E01 - Part One Master and Apprentice [DSNP WEBDL-1080p][EAC3 Atmos 5.1][h264]-NTb.mkv'\n" "Loki - S01E01 - Glorious Purpose [DSNP WEBDL-1080p Proper][EAC3 Atmos 5.1][h264]-TOMMY.mkv'\n" "Family - Guy (1999) - S01E01 - Death Has a Shadow [DSNP WEBDL-1080p][AAC 2.0][h264]-PHOENiX.mkv'\n" "Neighbours.S39E012.2023-10-05.Episode.8915.1080p.AMZN.WEB-DL.DDP2.0.H.264-SDCC\n" "Rick and Morty (2013) - S06E06 - JuRicksic Mort [HMAX DD 5.1 WEBDL-1080p][x264]-NTb.mkv\n" "1923.S01E01.1080p.BluRay.TrueHD5.1.H.264-SLIPSTREAM \n" "11.22.63.S01E01.2160p.WEB-DL.DDP5.1.H.265-NiXON\n\n" "1923.S01.1080p.BluRay.TrueHD5.1.H.264-SLIPSTREAM \n" "11.22.63.S01.2160p.WEB-DL.DDP5.1.H.265-NiXON\n" "Hello.World.S01.ntb.mkv\n" "Hello.World.S01 - S03.ntb.mkv\n" "Hello.World.S1.ntb.mkv\n" "Hello.World.S01 S03.ntb.mkv\n" "Hello.World.S01.Extras.ntb.mkv\n" "Hello_World_S01_S02.ntb.mkv\n" "Hello_World_S01-S03_ntb.mkv\n" "Hello_World_S1_ntb.mkv\n\n" "Hello.World.S1E03.ntb.mkv\n" "Hello.World.S031 E01.ntb.mkv\n" "Hello_World_S01E01_ntb.mkv\n" "Hello_World_S1E03_ntb.mkv\n" "Hello.World.S01.E01.ntb.mkv\n" "Hello_World_S01_E01_ntb.mkv") 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