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

/
/
sig

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"<div[^>]*>\d{6}<\/div>" test_str = ("<div dir=\"ltr\"><br><br><div class=\"gmail_quote\"><div dir=\"ltr\" class=\"gmail_attr\"><br></div><u></u>\n" " <div>\n" " <center id=\"m_-2051398760120817894wrapper\">\n" " <table id=\"m_-2051398760120817894main\" width=\"100%\">\n" " <tbody><tr id=\"m_-2051398760120817894logo\">\n" " <td>\n" " <table width=\"100%\">\n" " <tbody><tr>\n" " <td>\n" " <img src=\"test.com/logo.png\" width=\"140px\" alt=\"xxxxx Logo\" style=\"padding:0 10px\">\n" " </td>\n" " </tr>\n" " </tbody></table>\n" " </td>\n" " </tr>\n" " <tr>\n" " <td height=\"18px\"></td>\n" " </tr>\n" " <tr id=\"m_-2051398760120817894header\">\n" " <td>\n" " <table width=\"100%\">\n" " <tbody><tr>\n" " <td height=\"64px\" style=\"background-color:#10069f;color:#fff;padding-left:24px;font-weight:700\">Reset your password</td>\n" " </tr>\n" " </tbody></table>\n" " </td>\n" " </tr>\n" " <tr id=\"m_-2051398760120817894content\">\n" " <td>\n" " <table width=\"100%\">\n" " <tbody><tr>\n" " <td style=\"background-color:#f6f5ff;padding:24px 24px 16px 24px\">\n" " <p style=\"margin-top:0\">The following is the verification code required to complete your password reset.</p>\n" " <p style=\"margin-bottom:24px\">Enter the following verification code on the screen during the registration, and proceed to the next step.</p>\n" " <div style=\"display:block;text-align:center;margin-bottom:8px;background-color:#fff;height:92px;font-weight:600;font-size:36px;line-height:92px\">191418</div>\n" " <span style=\"display:block;font-size:12px;color:#5d5d5d\">*The verification code is valid only for 24 hours.</span>\n" " </td>\n" " </tr>\n" " </tbody></table>\n" " </td>\n" " </tr>\n" " <tr>\n" " <td height=\"24px\"></td>\n" " </tr>\n" " <tr id=\"m_-2051398760120817894footer\">\n" " <td>\n" " <table width=\"100%\">\n" " <tbody><tr>\n" " <td style=\"background-color:#6d7777;padding:16px 24px;font-size:12px;color:#fff\">\n" " <table width=\"100%\">\n" " <tbody><tr>\n" " <td id=\"m_-2051398760120817894footer-left\">\n" " <span style=\"display:block\">amnimo Inc.</span>\n" " <span style=\"display:block\">0-3-30 usaa-fso, xxxxxxxx-shi, Tokyo, 180-8750, Japan</span>\n" " <span style=\"display:block\">Phone: +81-422-52-6779</span>\n" " <span id=\"m_-2051398760120817894copyright-mb\" style=\"margin-top:16px\">© 2020 <div dir=\"ltr\"><br><br><div class=\"gmail_quote\"><div dir=\"ltr\" class=\"gmail_attr\"><br></div><u></u>\n" "<div>\n" " <center id=\"m_-2051398760120817894wrapper\">\n" " <table id=\"m_-2051398760120817894main\" width=\"100%\">\n" " <tbody><tr id=\"m_-2051398760120817894logo\">\n" " <td>\n" " <table width=\"100%\">\n" " <tbody><tr>\n" " <td>\n" " <img src=\"https://test.com/logo.png\" width=\"140px\" alt=\"Amnimo Logo\" style=\"padding:0 10px\">\n" " </td>\n" " </tr>\n" " </tbody></table>\n" " </td>\n" " </tr>\n" " <tr>\n" " <td height=\"18px\"></td>\n" " </tr>\n" " <tr id=\"m_-2051398760120817894header\">\n" " <td>\n" " <table width=\"100%\">\n" " <tbody><tr>\n" " <td height=\"64px\" style=\"background-color:#10069f;color:#fff;padding-left:24px;font-weight:700\">Reset your password</td>\n" " </tr>\n" " </tbody></table>\n" " </td>\n" " </tr>\n" " <tr id=\"m_-2051398760120817894content\">\n" " <td>\n" " <table width=\"100%\">\n" " <tbody><tr>\n" " <td style=\"background-color:#f6f5ff;padding:24px 24px 16px 24px\">\n" " <p style=\"margin-top:0\">The following is the verification code required to complete your password reset.</p>\n" " <p style=\"margin-bottom:24px\">Enter the following verification code on the screen during the registration, and proceed to the next step.</p>\n" " <div style=\"display:block;text-align:center;margin-bottom:8px;background-color:#fff;height:92px;font-weight:600;font-size:36px;line-height:92px\">191418</div>\n" " <span style=\"display:block;font-size:12px;color:#5d5d5d\">*The verification code is valid only for 24 hours.</span>\n" " </td>\n" " </tr>\n" " </tbody></table>\n" " </td>\n" " </tr>\n" " <tr>\n" " <td height=\"24px\"></td>\n" " </tr>\n" " <tr id=\"m_-2051398760120817894footer\">\n" " <td>\n" " <table width=\"100%\">\n" " <tbody><tr>\n" " <td style=\"background-color:#6d7777;padding:16px 24px;font-size:12px;color:#fff\">\n" " <table width=\"100%\">\n" " <tbody><tr>\n" " <td id=\"m_-2051398760120817894footer-left\">\n" " <span style=\"display:block\">test Inc.</span>\n" " <span style=\"display:block\">2-9-32 ssdsa-sss, puakano-shi, Tokyo, 000-8000, Japan</span>\n" " <span style=\"display:block\">Phone: +81-000-00-652</span>\n" " <span id=\"m_-2051398760120817894copyright-mb\" style=\"margin-top:16px\">© 2020 amnimo Inc.</span>\n" " </td>\n" " <td id=\"m_-2051398760120817894footer-right\">\n" " <span style=\"display:block\">© 2020 amnimo Inc.</span>\n" " </td>\n" " </tr>\n" " </tbody></table>\n" " </td>\n" " </tr>\n" " </tbody></table>\n" " </td>\n" " </tr>\n" " </tbody></table>\n" " </center>\n" "</div>\n" "</div></div> Inc.</span>\n" " </td>\n" " <td id=\"m_-2051398760120817894footer-right\">\n" " <span style=\"display:block\">© 2020 test Inc.</span>\n" " </td>\n" " </tr>\n" " </tbody></table>\n" " </td>\n" " </tr>\n" " </tbody></table>\n" " </td>\n" " </tr>\n" " </tbody></table>\n" " </center>\n" " </div>\n" " </div></div>") matches = re.finditer(regex, test_str, re.DOTALL | re.IGNORECASE) 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