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"(?#remove next set of parenthesis and content because its only for simulating automod)(^|\W|\b)(?<!player\.)(?<!blog\.)(?<!dev\.)(?<!link\.)(?<!affiliate\.)(?<!meetups\.)(?<!help\.)(?<!safety\.)(?<!devstatus\.)(?<!brand\.)(?<!sings\.)(?<!music\.)twitch\.tv\/(?!embed(\/|\b)|subs(\/|\b)|directory(\/|\b)|p\/|user(\/|\b)|legal(\/|\b)|admin(\/|\b)|login(\/|\b)|signup(\/|\b)|jobs(\/|\b)|videos(\/|\b)|collections(\/|\b)|downloads(\/|\b)|turbo(\/|\b)|store(\/|\b)|creatorcamp(\/|\b)|settings(\/|\b)|giftcard(\/|\b)|redeem(\/|\b)|broadcast(\/|\b)|partner(\/|\b)|bits(\/|\b)|prime(\/|\b))(\w+)\/?(?!\S)(?#remove next set of parenthesis and content because its only for simulating automod)($|\W|\b)", flags=re.IGNORECASE | re.DOTALL) test_str = ("https://www.twitch.tv/miametzmusic\n" "https://www.twitch.tv/miametzmusic\n" "https://twitch.tv/summit1g\n" "https://twitch.tv/summit1g/\n" "https://www.twitch.tv/subsp00ky\n" "https://www.twitch.tv/subsp00ky/\n\n" "https://player.twitch.tv/js/embed/v1.js\n" "https://player.twitch.tv/?channel=miametzmusic&parent=www.example.com\n" "https://www.twitch.tv/embed/miametzmusic/chat?parent=www.example.com\n" "https://www.twitch.tv/subs\n" "https://www.twitch.tv/subs/miametzmusic\n" "https://www.twitch.tv/directory\n" "https://www.twitch.tv/directory/all/tags/classical\n" "https://www.twitch.tv/miametzmusic/about\n" "https://www.twitch.tv/miametzmusic/schedule\n" "https://www.twitch.tv/miametzmusic/videos\n" "https://www.twitch.tv/videos/1821013434\n" "https://www.twitch.tv/videos/1821013434?t=00h00m13s\n" "https://www.twitch.tv/collections/EwAtC1IWzhY3Ww\n" "https://www.twitch.tv/videos/1277407565?collection=EwAtC1IWzhY3Ww\n" "https://www.twitch.tv/videos/1277407565?collection=EwAtC1IWzhY3Ww&t=00h00m52s\n" "https://player.twitch.tv/?collection=EwAtC1IWzhY3Ww&video=1277407565&parent=www.example.com\n" "https://player.twitch.tv/?collection=EwAtC1IWzhY3Ww&video=1277407565&time=0h2m27s&parent=www.example.com\n\n" "https://www.twitch.tv/p/giftcard/\n" "https://www.twitch.tv/p/about\n" "https://www.twitch.tv/p/en/about/\n" "https://blog.twitch.tv/\n" "https://blog.twitch.tv/en/\n" "https://blog.twitch.tv/en/archive/2023/\n" "https://dev.twitch.tv/\n" "https://dev.twitch.tv/products/\n" "https://www.twitch.tv/downloads\n" "https://www.twitch.tv/jobs\n" "https://www.twitch.tv/jobs/en/\n" "https://www.twitch.tv/turbo\n" "https://www.twitch.tv/store\n" "https://www.twitch.tv/creatorcamp\n" "https://www.twitch.tv/creatorcamp/en/paths/\n" "https://www.twitch.tv/settings/security\n" "https://link.twitch.tv/devchat\n" "https://affiliate.twitch.tv/\n" "https://meetups.twitch.tv/\n" "https://meetups.twitch.tv/events\n" "https://help.twitch.tv/\n" "https://help.twitch.tv/s/article/getting-started-twitch-studio\n" "https://www.twitch.tv/giftcard/buy?ref_=gc_twitch_landing\n" "https://www.twitch.tv/redeem\n" "https://safety.twitch.tv/\n" "https://safety.twitch.tv/s/article/Usernames\n" "https://devstatus.twitch.tv/\n" "https://devstatus.twitch.tv/uptime\n" "https://www.twitch.tv/broadcast/studio\n" "https://brand.twitch.tv/\n" "https://brand.twitch.tv/downloads/twitch-brand-assets.zip\n" "https://www.twitch.tv/partner/signup\n" "https://www.twitch.tv/bits\n" "https://www.twitch.tv/prime\n" "https://sings.twitch.tv/\n" "https://music.twitch.tv/") 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