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"(?<!cpc)((lifull-connect|facebook|mitula).*(referrer|referral))|bpihousingloans|rumah\.mitula|dotproperty\/blog-property-boost", flags=re.MULTILINE) test_str = ("lm.facebook.com\n" "facebook/social/listing\n" "en-gb.facebook.com\n" "lifull-connect/cpc/premium\n" "mitula/cpc/feed-client\n" "mitula/cpc/feed-default\n" "baan.mitula.in.th\n" "mitula/feed-client\n" "dotproperty/email/send-alert\n" "dotproperty/email/send-alert-interest\n" "dotproperty/email/enquiry\n" "dotproperty/email/click-to-call-property\n" "dotproperty/webpush/alert\n" "dotproperty/webpush/new-home\n" "dotproperty/android_app\n" "dotproperty.co.th\n" "dotpropertygroup.com\n" "facebook/cpc/[facebook][cpc][house][sale]\n" "lifull-connect/referrer/feed-client\n" "lifull-connect/referrer/feed-default\n" "directory.bpihousingloans.com\n" "lifull-connect/referrer/feed-featured\n" "rumah.mitula.co.id\n" "lifull-connect/referrer/feed-boost\n" "facebook/referral/[facebook][marketplace][condo][rent]\n" "dotproperty/blog-property-boost\n" "facebook/referral/[facebook][marketplace][house][rent]\n" "facebook/referral/[facebook][marketplace][townhouse][rent]\n" "mitula/referrer/feed-client\n" "facebook/referral/[facebook][marketplace][condo][sale]") 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