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
  • Match everything enclosed
    (?:...)
  • Capture everything enclosed
    (...)
  • 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
No Match

r"
"
g

Test String

Code Generator

Language

Generated Code

# coding=utf8 # the above tag defines encoding for this document and is for Python 2.x compatibility import re regex = r"([a-z]+\.){2,}[a-z]+" test_str = ("# 🧩 ReVanced Patches\n\n" "Official patches by ReVanced\n\n" "## 📜 List of available patches\n\n" "### 📦 `com.twitter.android`\n" "<details>\n\n" "| 💊 Patch | 📜 Description | 🏹 Target Version |\n" "|:--------:|:--------------:|:-----------------:|\n" "| `timeline-ads` | Removes ads from the Twitter timeline. | all |\n" "</details>\n\n" "### 📦 `com.reddit.frontpage`\n" "<details>\n\n" "| 💊 Patch | 📜 Description | 🏹 Target Version |\n" "|:--------:|:--------------:|:-----------------:|\n" "| `general-reddit-ads` | Removes general ads from the Reddit frontpage and subreddits. | all |\n" "</details>\n\n" "### 📦 `com.garzotto.pflotsh.ecmwf_a`\n" "<details>\n\n" "| 💊 Patch | 📜 Description | 🏹 Target Version |\n" "|:--------:|:--------------:|:-----------------:|\n" "| `pflotsh-ecmwf-subscription-unlock` | Unlocks all subscription features. | 3.5.4 |\n" "</details>\n\n" "### 📦 `com.google.android.apps.youtube.music`\n" "<details>\n\n" "| 💊 Patch | 📜 Description | 🏹 Target Version |\n" "|:--------:|:--------------:|:-----------------:|\n" "| `minimized-playback-music` | Enables minimized playback on Kids music. | 5.17.51 |\n" "| `tasteBuilder-remover` | Removes the \"Tell us which artists you like\" card from the home screen. | 5.16.51 |\n" "| `hide-get-premium` | Removes all \"Get Premium\" evidences from the avatar menu. | 5.17.51 |\n" "| `compact-header` | Hides the music category bar at the top of the homepage. | 5.16.51 |\n" "| `upgrade-button-remover` | Removes the upgrade tab from the pivot bar. | 5.17.51 |\n" "| `background-play` | Enables playing music in the background. | 5.17.51 |\n" "| `music-microg-support` | Allows YouTube Music ReVanced to run without root and under a different package name. | 5.17.51 |\n" "| `music-video-ads` | Removes ads in the music player. | 5.17.51 |\n" "| `codecs-unlock` | Adds more audio codec options. The new audio codecs usually result in better audio quality. | 5.17.51 |\n" "| `exclusive-audio-playback` | Enables the option to play music without video. | 5.17.51 |\n" "</details>\n\n" "### 📦 `de.dwd.warnapp`\n" "<details>\n\n" "| 💊 Patch | 📜 Description | 🏹 Target Version |\n" "|:--------:|:--------------:|:-----------------:|\n" "| `promo-code-unlock` | Disables the validation of promo code. Any code will work to unlock all features. | all |\n" "</details>\n\n" "### 📦 `com.ss.android.ugc.trill`\n" "<details>\n\n" "| 💊 Patch | 📜 Description | 🏹 Target Version |\n" "|:--------:|:--------------:|:-----------------:|\n" "| `tiktok-ads` | Removes ads from TikTok. | all |\n" "</details>\n\n" "### 📦 `com.google.android.youtube`\n" "<details>\n\n" "| 💊 Patch | 📜 Description | 🏹 Target Version |\n" "|:--------:|:--------------:|:-----------------:|\n" "| `swipe-controls` | Adds volume and brightness swipe controls. | 17.29.34 |\n" "| `seekbar-tapping` | Enables tap-to-seek on the seekbar of the video player. | 17.29.34 |\n" "| `minimized-playback` | Enables minimized and background playback. | 17.29.34 |\n" "| `amoled` | Enables pure black theme. | 17.29.34 |\n" "| `disable-create-button` | Hides the create button in the navigation bar. | 17.29.34 |\n" "| `hide-cast-button` | Hides the cast button in the video player. | all |\n" "| `return-youtube-dislike` | Shows the dislike count of videos using the Return YouTube Dislike API. | 17.29.34 |\n" "| `hide-autoplay-button` | Hides the autoplay button in the video player. | 17.29.34 |\n" "| `premium-heading` | Shows premium branding on the home screen. | all |\n" "| `custom-branding` | Changes the YouTube launcher icon and name to your choice (defaults to ReVanced). | all |\n" "| `disable-fullscreen-panels` | Disables video description and comments panel in fullscreen view. | 17.29.34 |\n" "| `old-quality-layout` | Enables the original quality flyout menu. | 17.29.34 |\n" "| `hide-shorts-button` | Hides the shorts button on the navigation bar. | 17.29.34 |\n" "| `hide-watermark` | Hides creator's watermarks on videos. | 17.29.34 |\n" "| `sponsorblock` | Integrate SponsorBlock. | 17.29.34 |\n" "| `enable-wide-searchbar` | Replaces the search icon with a wide search bar. This will hide the YouTube logo when active. | 17.29.34 |\n" "| `tablet-mini-player` | Enables the tablet mini player layout. | 17.29.34 |\n" "| `custom-video-buffer` | Lets you change the buffers of videos. | 17.29.34 |\n" "| `always-autorepeat` | Always repeats the playing video again. | 17.29.34 |\n" "| `microg-support` | Allows YouTube ReVanced to run without root and under a different package name with Vanced MicroG | 17.29.34 |\n" "| `settings` | Adds settings for ReVanced to YouTube. | all |\n" "| `enable-debugging` | Enables app debugging by patching the manifest file. | all |\n" "| `custom-playback-speed` | Adds more video playback speed options. | 17.29.34 |\n" "| `hdr-auto-brightness` | Makes the brightness of HDR videos follow the system default. | 17.29.34 |\n" "| `remember-video-quality` | Adds the ability to remember the video quality you chose in the video quality flyout. | 17.29.34 |\n" "| `video-ads` | Removes ads in the video player. | 17.29.34 |\n" "| `general-ads` | Removes general ads. | 17.29.34 |\n" "| `hide-infocard-suggestions` | Hides infocards in videos. | 17.29.34 |\n" "</details>\n\n\n") matches = re.finditer(regex, test_str) for matchNum, match in enumerate(matches, start=1): print ("Match {matchNum} was found at {start}-{end}: {match}".format(matchNum = matchNum, start = match.start(), end = match.end(), match = match.group())) for groupNum in range(0, len(match.groups())): groupNum = groupNum + 1 print ("Group {groupNum} found at {start}-{end}: {group}".format(groupNum = groupNum, start = match.start(groupNum), end = match.end(groupNum), group = match.group(groupNum))) # Note: for Python 2.7 compatibility, use ur"" to prefix the regex and u"" to prefix the test string and substitution.

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