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"(?(?=The following software are installed on the remote host :\s+))(?<software>[^\[]+)\[version\s(?<version>[^\]]+)\]") test_str = ("\"20811\",\"\",\"\",\"None\",\"182.56.44.12\",\"tcp\",\"445\",\"Microsoft Windows Installed Software Enumeration (credentialed check)\",\"It is possible to enumerate installed software.\",\"This plugin lists software potentially installed on the remote host by\n" " crawling the registry entries in :\n" " \n" " HKLM\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\n" " HKLM\\SOFTWARE\\Microsoft\\Updates\n" " \n" " Note that these entries do not necessarily mean the applications are\n" " actually installed on the remote host - they may have been left behind\n" " by uninstallers, or the associated files may have been manually\n" " removed.\",\"Remove any applications that are not compliant with your organization's\n" " acceptable use and security policies.\",\"\",\"\n" " The following software are installed on the remote host :\n" " \n" " 7-Zip 15.12 (x64) [version 15.12]\n" " Rapid Recovery Agent [version 6.1.3.100]\n" " JXplorer [version 3.3.1]\n" " System Center Endpoint Protection [version 4.10.207.0] [installed on 2016/10/26]\n" " Notepad++ [version 6.8.8]\n" " WinPcap 4.1.3 [version 4.1.0.2980]\n" " Wireshark 2.2.4 (64-bit) [version 2.2.4]\n" " Windows Firewall Configuration Provider [version 1.2.3412.0] [installed on 2015/11/20]\n" " Microsoft Visual C++ 2013 x86 Minimum Runtime - 12.0.21005 [version 12.0.21005] [installed on 2015/11/20]\n" " Microsoft Visual C++ 2010 x64 Redistributable - 10.0.40219 [version 10.0.40219] [installed on 2015/12/17]\n" " Microsoft Visual C++ 2013 x64 Additional Runtime - 12.0.40649 [version 12.0.40649] [installed on 2017/01/26]\n" " Java 7 Update 79 (64-bit) [version 7.0.790] [installed on 2015/12/14]\n" " Configuration Manager Client [version 5.00.8239.1000] [installed on 2018/03/28]\n" " Microsoft Visual C++ 2013 Redistributable (x64) - 12.0.40649 [version 12.0.40649.5]\n" " Microsoft Endpoint Protection Management Components [version 4.10.0207.0] [installed on 2016/10/26]\n" " Java SE Development Kit 7 Update 79 (64-bit) [version 1.7.0.790] [installed on 2015/12/14]\n" " Microsoft Visual C++ 2005 Redistributable [version 8.0.61001] [installed on 2015/12/17]\n" " Microsoft Visual C++ 2013 Redistributable (x64) - 12.0.21005 [version 12.0.21005.1]\n" " AppRecovery Agent [version 6.1.3.100] [installed on 2018/03/18]\n" " Microsoft Silverlight [version 5.1.30514.0] [installed on 2015/11/20]\n" " Microsoft Policy Platform [version 1.2.3602.0] [installed on 2015/11/20]\n" " Microsoft Forefront Endpoint Protection 2010 Server Management [version 4.10.0207.0] [installed on 2016/10/26]\n" " Microsoft Visual C++ 2013 x64 Minimum Runtime - 12.0.40649 [version 12.0.40649] [installed on 2017/01/26]\n" " Microsoft Security Client [version 4.10.0207.0] [installed on 2016/10/26]\n" " Microsoft SQL Server System CLR Types (x64) [version 10.51.2500.0] [installed on 2015/12/17]\n" " Microsoft SQL Server 2008 R2 Management Objects (x64) [version 10.51.2500.0] [installed on 2015/12/17]\n" " Microsoft Visual C++ 2010 x86 Redistributable - 10.0.40219 [version 10.0.40219] [installed on 2015/12/17]\n" " Microsoft Visual C++ 2013 x86 Additional Runtime - 12.0.21005 [version 12.0.21005] [installed on 2015/11/20]\n" " Microsoft Visual C++ 2005 Redistributable (x64) [version 8.0.61000] [installed on 2015/11/20]\n" " Microsoft Visual C++ 2013 Redistributable (x86) - 12.0.21005 [version 12.0.21005.1]\n" " \"") 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