Regular Expressions 101

Save & Manage Regex

  • Current Version: 1
  • Save & Share
  • Community Library

Flavor

  • PCRE2 (PHP)
  • ECMAScript (JavaScript)
  • Python
  • Golang
  • Java
  • .NET 7.0 (C#)
  • Rust
  • PCRE (Legacy)
  • Regex Flavor Guide

Function

  • Match
  • Substitution
  • List
  • Unit Tests
Sponsors
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]
  • Character class intersection
    [\w&&[^\d]]
  • 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"\S[A-Za-zéã.].*(?=\s\+[0-9])", flags=re.MULTILINE) test_str = ("🇦🇫 Afghanistan +93\n" "🇦🇽 Åland Islands +358\n" "🇦🇱 Albania +355\n" "🇩🇿 Algeria +213\n" "🇦🇸 American Samoa +1684\n" "🇦🇩 Andorra +376\n" "🇦🇴 Angola +244\n" "🇦🇮 Anguilla +1264\n" "🇦🇬 Antigua & Barbuda +1268\n" "🇦🇷 Argentina +54\n" "🇦🇲 Armenia +374\n" "🇦🇼 Aruba +297\n" "🇦🇺 Australia +61\n" "🇦🇹 Austria +43\n" "🇦🇿 Azerbaijan +994\n" "🇧🇸 Bahamas +1242\n" "🇧🇭 Bahrain +973\n" "🇧🇩 Bangladesh +880\n" "🇧🇧 Barbados +1246\n" "🇧🇾 Belarus +375\n" "🇧🇪 Belgium +32\n" "🇧🇿 Belize +501\n" "🇧🇯 Benin +229\n" "🇧🇲 Bermuda +1441\n" "🇧🇹 Bhutan +975\n" "🇧🇴 Bolivia +591\n" "🇧🇦 Bosnia & Herzegovina +387\n" "🇧🇼 Botswana +267\n" "🇧🇷 Brazil +55\n" "🇮🇴 British Indian Ocean Territory +246\n" "🇻🇬 British Virgin Islands +1284\n" "🇧🇳 Brunei +673\n" "🇧🇬 Bulgaria +359\n" "🇧🇫 Burkina Faso +226\n" "🇧🇮 Burundi +257\n" "🇰🇭 Cambodia +855\n" "🇨🇲 Cameroon +237\n" "🇨🇦 Canada +1\n" "🇨🇻 Cape Verde +238\n" "🇳🇱 Carribbean Netherlands +599\n" "🇰🇾 Cayman Islands +1345\n" "🇨🇫 Central African Republic +236\n" "🇹🇩 Chad +235\n" "🇨🇱 Chile +56\n" "🇨🇳 China +86\n" "🇨🇽 Christmas Islands +61\n" "🇨🇨 Cocos Islands +61\n" "🇨🇴 Colombia +57\n" "🇰🇲 Comoros +269\n" "🇨🇩 Congo-Kinshasa +243\n" "🇨🇬 Congo-Brazzaville +242\n" "🇨🇰 Cook Islands +682\n" "🇨🇷 Costa Rica +506\n" "🇭🇷 Croatia +385\n" "🇨🇺 Cuba +53\n" "🇨🇼 Curaçao +599\n" "🇨🇾 Cyprus +357\n" "🇨🇿 Czechia +420\n" "🇩🇰 Denmark +45\n" "🇩🇯 Djibouti +253\n" "🇩🇲 Dominica +1767\n" "🇩🇴 Dominican Republic +1\n" "🇪🇨 Ecuador +593\n" "🇪🇬 Egypt +20\n" "🇸🇻 El Salvador +503\n" "🇬🇶 Equatorial Guinea +240\n" "🇪🇷 Eritrea +291\n" "🇪🇪 Estonia +372\n" "🇪🇹 Ethiopia +251\n" "🇫🇰 Falkland Islands +500\n" "🇫🇴 Faroe Islands +298\n" "🇫🇯 Fiji +679\n" "🇫🇮 Finland +358\n" "🇫🇷 France +33\n" "🇬🇫 French Guiana +594\n" "🇵🇫 French Polynesia +689\n" "🇬🇦 Gabon +241\n" "🇬🇲 Gambia +220\n" "🇬🇪 Georgia +995\n" "🇩🇪 Germany +49\n" "🇬🇭 Ghana +233\n" "🇬🇮 Gibraltar +350\n" "🇬🇷 Greece +30\n" "🇬🇱 Greenland +299\n" "🇬🇩 Grenada +1473\n" "🇬🇵 Guadeloupe +590\n" "🇬🇺 Guam +1671\n" "🇬🇹 Guatemala +502\n" "🇬🇬 Guernsey +44\n" "🇬🇳 Guinea +224\n" "🇬🇼 Guinea-Bissau +245\n" "🇬🇾 Guyana +592\n" "🇭🇹 Haiti +509\n" "🇭🇳 Honduras +504\n" "🇭🇰 Hong Kong +852\n" "🇭🇺 Hungary +36\n" "🇮🇸 Iceland +354\n" "🇮🇳 India +91\n" "🇮🇩 Indonesia +62\n" "🇮🇷 Iran +98\n" "🇮🇶 Iraq +964\n" "🇮🇪 Ireland +353\n" "🇮🇲 Isle of Man +44\n" "🇮🇱 Israel +972\n" "🇮🇹 Italy +39\n" "🇨🇮 Ivory Coast +225\n" "🇯🇲 Jamaica +1\n" "🇯🇵 Japan +81\n" "🇯🇪 Jersey +44\n" "🇯🇴 Jordan +962\n" "🇰🇿 Kazakhstan +7\n" "🇰🇪 Kenya +254\n" "🇰🇮 Kiribati +686\n" "🇽🇰 Kosovo +383\n" "🇰🇼 Kuwait +965\n" "🇰🇬 Kyrgyzstan +996\n" "🇱🇦 Laos +856\n" "🇱🇻 Latvia +371\n" "🇱🇧 Lebanon +961\n" "🇱🇸 Lesotho +266\n" "🇱🇷 Liberia +231\n" "🇱🇾 Libya +218\n" "🇱🇮 Liechtenstein +423\n" "🇱🇹 Lithuania +370\n" "🇱🇺 Luxembourg +352\n" "🇲🇴 Macau +853\n" "🇲🇬 Madagascar +261\n" "🇲🇼 Malawi +265\n" "🇲🇾 Malaysia +60\n" "🇲🇻 Maldives +960\n" "🇲🇱 Mali +223\n" "🇲🇹 Malta +356\n" "🇲🇭 Marshall Islands +692\n" "🇲🇶 Martinique +596\n" "🇲🇷 Mauritania +222\n" "🇲🇺 Mauritius +230\n" "🇾🇹 Mayotte +262\n" "🇲🇽 Mexico +52\n" "🇫🇲 Micronesia +691\n" "🇲🇩 Moldova +373\n" "🇲🇨 Monaco +377\n" "🇲🇳 Mongolia +976\n" "🇲🇪 Montenegro +382\n" "🇲🇸 Montserrat +1664\n" "🇲🇦 Morocco +212\n" "🇲🇿 Mozambique +258\n" "🇲🇲 Myanmar +95\n" "🇳🇦 Namibia +264\n" "🇳🇷 Nauru +674\n" "🇳🇵 Nepal +977\n" "🇳🇱 Netherlands +31\n" "🇳🇨 New Caledonia +687\n" "🇳🇿 New Zealand +64\n" "🇳🇮 Nicaragua +505\n" "🇳🇪 Niger +227\n" "🇳🇬 Nigeria +234\n" "🇳🇺 Niue +683\n" "🇳🇫 Norfolk Island +6723\n" "🇰🇵 North Korea +850\n" "🇲🇰 North Macedonia +389\n" "🇲🇵 Northern Mariana Islands +1670\n" "🇳🇴 Norway +47\n" "🇴🇲 Oman +968\n" "🇵🇰 Pakistan +92\n" "🇵🇼 Palau +680\n" "🇵🇦 Panama +507\n" "🇵🇬 Papua New Guinea +675\n" "🇵🇾 Paraguay +595\n" "🇵🇪 Peru +51\n" "🇵🇭 Philippines +63\n" "🇵🇱 Poland +48\n" "🇵🇹 Portugal +351\n" "🇵🇷 Puerto Rico +1\n" "🇶🇦 Qatar +974\n" "🇫🇷 Réunion +262\n" "🇷🇴 Romania +40\n" "🇷🇺 Russia +7\n" "🇷🇼 Rwanda +250\n" "🇧🇱 Saint-Barthélemy +590\n" "🇸🇭 Saint Helena +290\n" "🇰🇳 Saint Kitts & Nevis +1869\n" "🇱🇨 Saint Lucia +1758\n" "🇫🇷 Saint Martin +590\n" "🇵🇲 Saint Pierre & Miquelon +508\n" "🇻🇨 Saint Vincent & Grenadines +1784\n" "🇼🇸 Samoa +685\n" "🇸🇲 San Marino +378\n" "🇸🇹 São Tomé & Príncipe +239\n" "🇸🇦 Saudi Arabia +966\n" "🇸🇳 Senegal +221\n" "🇷🇸 Serbia +381\n" "🇸🇨 Seychelles +248\n" "🇸🇱 Sierra Leone +232\n" "🇸🇬 Singapore +65\n" "🇸🇽 Sint Maarten +1721\n" "🇸🇰 Slovakia +421\n" "🇸🇮 Slovenia +386\n" "🇸🇧 Solomon Islands +677\n" "🇸🇴 Somalia +252\n" "🇿🇦 South Africa +27\n" "🇰🇷 South Korea +82\n" "🇸🇸 South Sudan +211\n" "🇪🇸 Spain +34\n" "🇱🇰 Sri Lanka +94\n" "🇸🇩 Sudan +249\n" "🇸🇷 Suriname +597\n" "🇳🇴 Svalbard & Jan Mayen +47\n" "🇸🇿 Swaziland +268\n" "🇸🇪 Sweden +46\n" "🇨🇭 Switzerland +41\n" "🇸🇾 Syria +963\n" "🇹🇼 Taiwan +886\n" "🇹🇯 Tajikistan +992\n" "🇹🇿 Tanzania +255\n" "🇹🇭 Thailand +66\n" "🇹🇱 Timor-Leste +670\n" "🇹🇬 Togo +228\n" "🇹🇰 Tokelau +690\n" "🇹🇴 Tonga +676\n" "🇹🇹 Trinidad & Tobago +1868\n" "🇹🇳 Tunisia +216\n" "🇹🇷 Turkey +90\n" "🇹🇲 Turkmenistan +993\n" "🇹🇨 Turks & Caicos Islands +1649\n" "🇹🇻 Tuvalu +688\n" "🇻🇮 U.S. Virgin Islands +1340\n" "🇺🇬 Uganda +256\n" "🇺🇦 Ukraine +380\n" "🇦🇪 United Arab Emirates +971\n" "🇬🇧 United Kingdom +44\n" "🇺🇸 United States +1\n" "🇺🇾 Uruguay +598\n" "🇺🇿 Uzbekistan +998\n" "🇻🇺 Vanuatu +678\n" "🇻🇦 Vatican City +39\n" "🇻🇪 Venezuela +58\n" "🇻🇳 Vietnam +84\n" "🇼🇫 Wallis & Futuna +681\n" "🇪🇭 Western Sahara +212\n" "🇾🇪 Yemen +967\n" "🇿🇲 Zambia +260\n" "🇿🇼 Zimbabwe +263") 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