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"(?P<mesini>\d{2})(?P<diaini>\d{2})(?P<horaini>\d{2})(?P<minini>\d{2})\s(?P<duracaosegundo>\d{5})\s\d{4}\s(\w|\s)\s{6}\s\s(?<rota>(\d{4})|\s{4})\s{6,18}(?<numerob>\d{4})\s(?<ramal>\d{4,8})\s{20,24}(?P<senha>(\d{6}|\s{6}))\s{8}\d{2}\s(?<tronco>(\d{5}|\s{5}))(?<nodetrunk>\d{4})\n" test_str = ("06191520 00102 0000 J 4776 6512 00 4776\n" " \n" "06191522 00118 0000 4770 6512 00 024017001\n" " \n" "06191535 00037 0000 I 6512 98311871 00 6512\n" "06191532 00000 0000 B 6512 98311871 00 \n" " \n" "06191529 00141 0000 M 0 2470 999308509 6512 00 002002003\n" " \n" "06191555 01854 0000 M 0 2470 33485083 6512 00 002002003\n" " \n" "06191655 00151 0000 M 0 2470 01128983434 6512 00 002002003\n" "06191656 00011 0000 M 0 2470 01128983434 6512 00 002002009\n" "06191658 00130 0000 T 0 2470 01128983434 4776 00 002002009\n" "06191701 00137 0000 M 0 2470 01128983434 6512 00 002002009\n" "06191701 00000 0000 0 2470 01128983434 4776 00 002002009\n" " \n" "06191632 00034 0000 J 4776 6512 00 4776\n" "06191632 00034 0000 J 4776 6512 00 4776\n" "06191634 00203 0000 T 0 2470 999308509 4776 00 002002001\n" " \n" "06191630 00001 0000 J 6361 6512 00 6361\n" "06191630 00001 0000 J 6361 6512 00 6361\n" " \n" "06191644 00009 0000 M 0 2470 33283828 6512 00 002002007\n" "06191645 00136 0000 T 0 2470 33283828 4776 00 002002007\n" " \n" "06191632 00001 0000 M 0 2470 999308509 6512 00 002002001\n" "06191634 00203 0000 T 0 2470 999308509 4776 00 002002001\n" " \n" "06191656 00011 0000 M 0 2470 01128983434 6512 00 002002009\n" "06191658 00130 0000 T 0 2470 01128983434 4776 00 002002009\n" " \n" "06191644 00009 0000 M 0 2470 33283828 6512 00 002002007\n" "06191645 00136 0000 T 0 2470 33283828 4776 00 002002007\n" " \n" "06191632 00001 0000 M 0 2470 999308509 6512 00 002002001\n" "06191634 00203 0000 T 0 2470 999308509 4776 00 002002001\n" "06191652 00106 0000 M 0 2470 999308509 6512 00 002002003\n" "06191652 00000 0000 0 2470 999308509 6512 00 002002003\n" " \n" "06191656 00011 0000 M 0 2470 01128983434 6512 00 002002009\n" "06191658 00130 0000 T 0 2470 01128983434 4776 00 002002009\n" "06191701 00137 0000 M 0 2470 01128983434 6512 00 002002009\n" "06191701 00000 0000 0 2470 01128983434 4776 00 002002009\n" " \n" "06220921 00130 0000 M 0 2470 012997319079 6512 00 002002002\n" " \n" "06220922 00004 0000 M 0 2470 012997319079 6512 00 002002005\n" "06220924 00157 0000 T 0 2470 012997319079 4776 00 002002005\n" " \n" "06220926 00144 0000 M 0 2470 012997319079 6512 00 002002006\n" "06220926 00009 0000 0 2470 012997319079 4776 00 002002006\n" " \n" "06220935 00347 0000 M 0 2470 33485083 6512 578129 00 002002001\n" " \n" "06220938 00211 0000 M 0 2470 999308509 6512 578129 00 002002002\n") 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