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
No Match

/
/
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"<span class=\"_c1 ei_card_subtitle _c1\">.*?([\dX]+).*?<\/span>" test_str = "<body class=\"default-theme des-mat\" style=\"background: rgb(255, 255, 255);\"><div id=\"prpd\"></div><div class=\"\" id=\"mngb\"><div id=\"gb\" class=\"gb_T\"><div class=\"gb_nb gb_Lg gb_R gb_Kg gb_Og gb_T\" style=\"min-width: 241px;\"><div class=\"gb_oe gb_R gb_Lg gb_Bg\"><div class=\"gb_Q gb_R gb_S gb_Lg\"><span class=\"_c1 ei_card_subtitle _c1\">Name<br /> 713286XXX971 - 12021980</span>/div><div class=\"gb_Q gb_R\"><a class=\"gb_P\" data-pid=\"23\" href=\"https://mail.google.com/mail/?authuser=0\">Gmail</a></div><div class=\"gb_Q gb_R\"><a class=\"gb_P\" data-pid=\"2\" href=\"https://www.google.com/imghp?hl=en&amp;authuser=0\">Images</a></div></div><div class=\"gb_Ec gb_Lg gb_R\" style=\"min-width: 120px;\"><div class=\"gb_fa\" id=\"gbsfw\" style=\"background-color:#eee;min-width:376px\"><iframe ng-non-bindable=\"\" frameborder=\"0\" hspace=\"0\" marginheight=\"0\" marginwidth=\"0\" scrolling=\"no\" style=\"width: 376px; height: 380px;\" tabindex=\"0\" vspace=\"0\" width=\"100%\" class=\"gb_9b\" allowtransparency=\"true\" aria-hidden=\"true\" id=\"I0_1523641321551\" name=\"I0_1523641321551\" src=\"https://notifications.google.com/u/0/widget?sourceid=243&amp;hl=en&amp;origin=https%3A%2F%2Fwww.google.com&amp;uc=1&amp;usegapi=1&amp;jsh=m%3B%2F_%2Fscs%2Fabc-static%2F_%2Fjs%2Fk%3Dgapi.gapi.en.DgOlXVbWcXc.O%2Fm%3D__features__%2Frt%3Dj%2Fd%3D1%2Frs%3DAHpOoo-riybzrJ8O_UpInxWO1d1OWu1FtA#pid=243&amp;_methods=onError%2ConInfo%2ChideNotificationWidget%2CpostSharedMessage%2Creauth%2CsetNotificationWidgetHeight%2CsetNotificationWidgetSize%2CswitchTo%2CnavigateTo%2CsetNotificationText%2CsetNotificationAnimation%2CgetNotificationText%2CvalidateUser%2C_ready&amp;id=I0_1523641321551&amp;_gfid=I0_1523641321551&amp;parent=https%3A%2F%2Fwww.google.com&amp;pfname=&amp;rpctoken=13573360\"></iframe></div><div class=\"gb_da gb_9c gb_R\" id=\"gbwa\"><div class=\"gb_Qc\"><a class=\"gb_b gb_hc\" href=\"https://www.google.com/intl/en/options/\" title=\"Google apps\" aria-expanded=\"false\" role=\"button\" tabindex=\"0\"></a><div class=\"gb_wb\"></div></body>" 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