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

/
/
gm

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"(Location\s*:\s*)([a-zA-Z0-9:]*)\s*(Model\s*:\s*)([a-zA-Z0-9]*)" test_str = ("SSD Firmware Check 09/08/2020 02:49:05\n" "==================================================================\n" "*** Reminder: This script queries the HPE Smart Array controller through the iLO and thus will only detect drives attached to HPE Smart Array controllers. Drives in external storage enclosures where the enclosures have their own storage controller that manage their installed drives will not be detected. For these situations, further analysis will be required to confirm whether affected drives are installed. Review the iLO GUI ‘System Information -> Storage' tab ---> only drives listed on that page will be evaluated by this script. ***\n" "Server Info:\n" "==================================================================\n\n\n" "SerialNumber : CZJ911084W\n" "ServerName : \n" "iLO HostName : ILOCZJ911084W\n" "ServerModel : ProLiant DL360 Gen10\n" "iLO URL : \n\n\n\n" "The following discovered drives need a firmware update to Version HPD8 before PowerOnHours exceed 32,000 hours:\n" "==================================================================\n\n\n" "Location : 1I:1:3\n" "Model : VK003840JWSST\n" "PowerOnHours : 10242\n" "SerialNumber : S48XNF0M102213\n" "FirmwareVersion : HPD1\n" "Failure : APPROACHING\n" "CurrentOperatingMode : Mixed\n" "SmartArrayModel : HPE Smart Array P816i-a SR Gen10") matches = re.finditer(regex, test_str, re.MULTILINE) 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