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"(?x) (?<!\d) (\d{5} | K\d{4}) (?!\d)" test_str = ("(1) | 1 | 2018/ID11298 00000012345 PersoNR: 889899 Bridgestone BNPN\n" "(2) | 3 | Kompo 32280EP ###Baukasten### 3789936690 ID PFK Carbon0\n" "(3) | 2 | 20613, 20614, Mietop Antragsnummer C300Coup IVS 33221 ABF\n" "(4) | 2 | Q21009 China lokal produzierte Derivate f/Radverbund 991222 VV\n" "(5) | 6 | ID:61953 F-Pace Enfantillages (Machine arriere) VvSKPMG Lyon09\n" "(6) | 2 | 2017/22222 22222 21895 Einzelkostenprob. 28932 ZürichMP KOS\n" "(7) | K | ID:K1245 Panamera Nitsche Radlager Derivativ Bayreumion PwC\n" "(8) | 7 | LaunchSupport QBremsen BBG BFG BBD 70142,70119 KK 70142") 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