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

Generated Code

import re regex = re.compile(r""" ^(((((.+\.)*(msedge))|((((.+\.)*(scsquery\-ss\-us))|((.+\.)*(scsquery\-ss\-eu))|((.+\.)*(scsquery\-ss\-asia))|((.+\.)*(scsinstrument\-ss\-us))|((.+\.)*(skypemaprdsitus)))\.(trafficmanager))|((.+\.)*(msftauth))|((((((((.+\.)*(policykeyservice)))\.(dc)))\.(ad)))\.(msft))|((.+\.)*(phonefactor))|((((((((.+\.)*(informationprotection)))\.(hosting)))\.(portal))|((.+\.)*(amp)))\.(azure))|((((((.+\.)*(ecn)))\.(dev)))\.(virtualearth))|((((.+\.)*(apis)))\.(live))|((((.+\.)*(spoprod\-a)))\.(akamaihd))|((((.+\.)*(cdn)))\.(onenote))|((.+\.)*(msecnd))|((.+\.)*(msftauthimages))|((((((((.+\.)*(officecdn)))\.(microsoft)))\.(com)))\.(edgesuite))|((.+\.)*(msauth))|((((.+\.)*(mlccdnprod)))\.(azureedge))|((.+\.)*(msauthimages))|((((((.+\.)*(insertmedia)))\.(bing))|((((.+\.)*(videocontent))|((.+\.)*(videoplayercdn))|((.+\.)*(contentstorage))|((.+\.)*(video)))\.(osi))|((((.+\.)*(support)))\.(content))|((.+\.)*(cdn))|((.+\.)*(attachments))|((.+\.)*(suite)))\.(office))|((.+\.)*(windows)))\.(net))|((((((.+\.)*(appsforoffice))|((.+\.)*(c1))|((.+\.)*(crl))|((((.+\.)*(r)))\.(office))|((.+\.)*(aria))|((.+\.)*(technet))|((.+\.)*(officecdn))|((.+\.)*(officeredir))|((.+\.)*(officepreviewredir))|((.+\.)*(office15client))|((.+\.)*(go))|((.+\.)*(msdn))|((((.+\.)*(activation)))\.(sls))|((.+\.)*(support))|((.+\.)*(compass\-ssl))|((.+\.)*(docs))|((((.+\.)*(events)))\.(data))|((.+\.)*(officeclient)))\.(microsoft))|((.+\.)*(outlook))|((.+\.)*(microsoftonline))|((((.+\.)*(secure)))\.(skypeassets))|((.+\.)*(sharepointonline))|((((.+\.)*(informationprotection))|((.+\.)*(management))|((.+\.)*(adhybridhealth)))\.(azure))|((((.+\.)*(g))|((.+\.)*(officeapps))|((((.+\.)*(client)))\.(hip)))\.(live))|((.+\.)*(onenote))|((((.+\.)*(\-myfiles))|((.+\.)*(\-files)))\.(sharepoint))|((((.+\.)*(admin))|((.+\.)*(www)))\.(onedrive))|((.+\.)*(o365weve))|((((.+\.)*(platform)))\.(linkedin))|((.+\.)*(azurerms))|((((.+\.)*(prod))|((.+\.)*(shellprod)))\.(msocdn))|((.+\.)*(microsoftonline\-p))|((((.+\.)*(cdn)))\.(optimizely))|((((.+\.)*(quicktips)))\.(skypeforbusiness))|((((.+\.)*(ajax)))\.(aspnetcdn))|((.+\.)*(aadrm))|((((.+\.)*(products))|((.+\.)*(delve\-gcc))|((.+\.)*(support))|((.+\.)*(templates))|((.+\.)*(outlook))|((.+\.)*(delve))|((((.+\.)*(webshell)))\.(suite)))\.(office))|((.+\.)*(office365))|((.+\.)*(sfbassets))|((((((.+\.)*(skydrive)))\.(wns)))\.(windows))|((.+\.)*(skype)))\.(com))|((((.+\.)*(svc))|((((.+\.)*(auth)))\.(gfx))|((.+\.)*(aka))|((.+\.)*(mstea))|((((.+\.)*(assets)))\.(onestore))|((((.+\.)*(oneclient)))\.(sfx)))\.(ms)))$ """, flags=re.VERBOSE | re.MULTILINE) test_str = ("aadrm.com\n" "account.activedirectory.windowsazure.com\n" "acompli.net\n" "ad.atdmt.com\n" "adhybridhealth.azure.com\n" "adl.windows.com\n" "ajax.aspnetcdn.com\n" "aka.ms\n" "appex-rf.msn.com\n" "assets.onestore.ms\n" "assets-yammer.com\n" "atp.azure.com\n" "auth.gfx.ms\n" "autologon.microsoftazuread-sso.com\n" "azure.net\n" "azureedge.net\n" "azurerms.com\n" "bing.com\n" "bit.ly\n" "by.uservoice.com\n" "c.bing.net\n" "cdn.optimizely.com\n" "clientconfig.microsoftonline-p.net\n" "cloudapp.net\n" "ctldl.windowsupdate.com\n" "dc.services.visualstudio.com\n" "ecn.dev.virtualearth.net\n" "eus-www.sway-cdn.com\n" "eus-www.sway-extensions.com\n" "excelbingmap.firstpartyapps.oaspapps.com\n" "firstpartyapps.oaspapps.com\n" "graph.facebook.com\n" "hockeyapp.net\n" "informationprotection.azure.com\n" "isrg.trustid.ocsp.identrust.com\n" "live.com\n\n" "live.net\n" "login.windows-ppe.net\n" "lync.com\n" "management.azure.com\n" "mem.gfx.ms\n" "microsoft.com\n\n\n\n\n\n\n\n\n" "microsoftonline.com\n\n\n\n\n\n\n\n\n\n\n\n" "microsoftonline-p.com\n\n" "microsoftstream.com\n" "msappproxy.net\n" "msauth.net\n" "msauthimages.net\n" "msecnd.net\n" "msedge.net\n" "msftauth.net\n" "msftauthimages.net\n" "msftidentity.com\n" "msidentity.com\n" "msocdn.com\n" "mstea.ms\n" "o365weve.com\n" "office.com\n\n\n\n\n\n\n\n\n\n\n" "office.net\n" "office365.com\n\n" "officecdn.microsoft.com.edgesuite.net\n" "oneclient.sfx.ms\n" "onedrive.com\n" "onenote.com\n" "onmicrosoft.com\n" "outlook.com\n\n" "outlook.uservoice.com\n" "outlookmobile.com\n" "partnerservices.getmicrosoftkey.com\n" "peoplegraph.firstpartyapps.oaspapps.com\n" "phonefactor.net\n" "policykeyservice.dc.ad.msft.net\n" "portal.cloudappsecurity.com\n" "prod.firstpartyapps.oaspapps.com.akadns.net\n" "secure.skypeassets.com\n" "sfbassets.com\n" "sharepoint.com\n" "sharepointonline.com\n" "skydrive.wns.windows.com\n" "skype.com\n\n" "skypeforbusiness.com\n" "social.yahooapis.com\n" "spoprod-a.akamaihd.net\n" "staffhub.ms\n" "staffhub.uservoice.com\n" "svc.ms\n" "sway.com\n" "symcb.com\n" "symcd.com\n" "telemetryservice.firstpartyapps.oaspapps.com\n" "trafficmanager.net\n" "tse1.mm.bing.net\n" "view.atdmt.com\n" "wikipedia.firstpartyapps.oaspapps.com\n" "windows.net\n\n\n" "windowsupdate.com\n" "wus-firstpartyapps.oaspapps.com\n" "wus-www.sway-cdn.com\n" "wus-www.sway-extensions.com\n" "yammer.com\n" "yammerusercontent.com\n") 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