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

Substitution
Processing...

Code Generator

Language

Generated Code

import re regex = re.compile(r"(?:\h*<!-- ARTICOL START -->\R|\G)\K(?:(<p class=.*?</p>\R?)|(?:(?!<p class=.*?</p>)[\s\S])+)(?=[\s\S]+<!-- ARTICOL FINAL -->)", flags=re.MULTILINE) test_str = (" <!-- ARTICOL START -->\n\n" "<div align=\"justify\">\n" " <table width=\"682\" border=\"0\">\n" " <tr>\n" " <td><h1 class=\"den_articol\" itemprop=\"sfe\">My text here</h1></td>\n" " </tr>\n" " <tr>\n" " <td class=\"text_dreapta\">On Ianuarie 14, 2014, in <a href=\"https://neculaifantanaru.com/en/qualities-of-a-leader.html\" title=\"See al articles from Qualities of a leader\" class=\"external\" rel=\"category tag\">Qualities of a leader</a>, by Author</td>\n" " </tr>\n" " </table>\n" " <h2 class=\"text_obisnuit2\"><img src=\"index_files/sfa.jpg\" width=\"718\" height=\"605\" id=\"sfs\" usemap=\"#m_dgrnt\" alt=\"hip\" /><map name=\"tfAbonament\" id=\"m_34\">\n" "<area shape=\"rect\" coords=\"259,545,457,582\" href=\"#plata\" alt=\"\" />\n" "</map></h2>\n" " <p class=\"den_articol\">Why this text text?</p>\n" "<p class=\"text_obisnuit\">test text text</p>\n" " <p class=\"text_obisnuit\">test text text</p>\n" " <p class=\"text_obisnuit2\">test text text</p>\n" " </div>\n" " <p align=\"justify\" class=\"text_obisnuit style3\">&nbsp;</p>\n" " \n" " <!-- ARTICOL FINAL -->") subst = "$1" result = regex.sub(subst, test_str) if result: print(result)

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