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
  • Match everything enclosed
    (?:...)
  • Capture everything enclosed
    (...)
  • 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

r"
"
mg

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"\(+(\H\o|[P]|\P\o|[G])\w+\s(\(\w+\s|\(\w+\s\()(\(\w+\s\w+\s\)\d+\s\)\d+\s\)\d+\s\)\d+\s\)|\w+\s\)\d+\s\)\d+\s\w+\s+\)\d+\s\)\d+\s)" test_str = ("(Macaca_mulatta Colobus_angolensis_palliatus (Pan_troglodytes_troglodytes ((Hylobates_agilis (Nomascus_leucogenys Symphalangus_syndactylus )21 )87 (Pongo_abelii (Homo_sapiens Gorilla_gorilla )64 )20 )12 )94 )\n" "\\)\\d+\\s\\)\\d+\\s\n" "(\\(\\w+\\s|\\w+\\s)(\\)\\d+|\\w+)\\s(\\w+\\s\\)\\d+|\\)\\d+\\s\\)\\d+)\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Symphalangus_syndactylus Hylobates_agilis )55 )100 (Pongo_abelii (Homo_sapiens (Pan_troglodytes_troglodytes Gorilla_gorilla )63 )100 )83 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Symphalangus_syndactylus Hylobates_agilis )86 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )99 )100 )73 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Symphalangus_syndactylus (Hylobates_agilis Nomascus_leucogenys )91 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )81 )100 )87 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Symphalangus_syndactylus (Hylobates_agilis Nomascus_leucogenys )72 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )94 )100 )93 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Symphalangus_syndactylus (Hylobates_agilis Nomascus_leucogenys )58 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )90 )100 )83 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Hylobates_agilis Symphalangus_syndactylus )68 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )81 )100 )72 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Symphalangus_syndactylus (Hylobates_agilis Nomascus_leucogenys )90 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )92 )100 )99 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Hylobates_agilis Symphalangus_syndactylus )68 )100 (Pongo_abelii (Homo_sapiens (Pan_troglodytes_troglodytes Gorilla_gorilla )89 )100 )99 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Symphalangus_syndactylus (Hylobates_agilis Nomascus_leucogenys )47 )100 (Pongo_abelii (Pan_troglodytes_troglodytes (Gorilla_gorilla Homo_sapiens )48 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Hylobates_agilis Symphalangus_syndactylus )81 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )71 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )29 )67 )84 (Hylobates_agilis (Symphalangus_syndactylus Nomascus_leucogenys )36 )99 )98 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Symphalangus_syndactylus Hylobates_agilis )58 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )82 )100 )93 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Hylobates_agilis Symphalangus_syndactylus )68 )100 (Pongo_abelii (Homo_sapiens (Gorilla_gorilla Pan_troglodytes_troglodytes )49 )100 )91 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Symphalangus_syndactylus Hylobates_agilis )58 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )45 )100 )99 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Hylobates_agilis (Symphalangus_syndactylus Nomascus_leucogenys )35 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )43 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Symphalangus_syndactylus Hylobates_agilis )45 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )90 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Symphalangus_syndactylus (Hylobates_agilis Nomascus_leucogenys )44 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )63 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )97 )100 )97 ((Nomascus_leucogenys Symphalangus_syndactylus )40 Hylobates_agilis )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Hylobates_agilis Symphalangus_syndactylus )43 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )46 )100 )96 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Symphalangus_syndactylus (Hylobates_agilis Nomascus_leucogenys )46 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )100 )100 )99 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Symphalangus_syndactylus (Hylobates_agilis Nomascus_leucogenys )52 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )94 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Symphalangus_syndactylus (Hylobates_agilis Nomascus_leucogenys )57 )98 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )53 )100 )84 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Symphalangus_syndactylus (Hylobates_agilis Nomascus_leucogenys )55 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )98 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Symphalangus_syndactylus (Hylobates_agilis Nomascus_leucogenys )75 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )85 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Symphalangus_syndactylus Hylobates_agilis )84 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )98 )100 )93 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )58 )100 )99 (Symphalangus_syndactylus (Hylobates_agilis Nomascus_leucogenys )53 )100 )100 )\n\n" "\\(\\((\\H\\y|[NS])\\w+\\s(\\(\\w+\\s|\\w+\\s)(\\)\\d+|\\w+)\\s(\\w+\\s\\)\\d+|\\)\\d+\\s\\)\\d+)\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Symphalangus_syndactylus Hylobates_agilis )57 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )93 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Hylobates_agilis (Symphalangus_syndactylus Nomascus_leucogenys )39 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )95 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Hylobates_agilis Symphalangus_syndactylus )83 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )73 )100 )99 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )85 )100 )99 ((Hylobates_agilis Symphalangus_syndactylus )68 Nomascus_leucogenys )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Symphalangus_syndactylus Hylobates_agilis )54 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )79 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Symphalangus_syndactylus (Hylobates_agilis Nomascus_leucogenys )37 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )55 )100 )99 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Pongo_abelii (Gorilla_gorilla (Homo_sapiens Pan_troglodytes_troglodytes )86 )100 )78 (Symphalangus_syndactylus (Hylobates_agilis Nomascus_leucogenys )64 )98 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Symphalangus_syndactylus Hylobates_agilis )55 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )92 )100 )98 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )99 )100 )95 ((Hylobates_agilis Symphalangus_syndactylus )62 Nomascus_leucogenys )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Hylobates_agilis Symphalangus_syndactylus )76 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )92 )100 )99 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Symphalangus_syndactylus (Hylobates_agilis Nomascus_leucogenys )43 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )63 )100 )99 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Hylobates_agilis Symphalangus_syndactylus )75 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )94 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Symphalangus_syndactylus (Nomascus_leucogenys Hylobates_agilis )31 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )84 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Hylobates_agilis Symphalangus_syndactylus )60 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )92 )100 )95 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )88 )100 )100 ((Hylobates_agilis Symphalangus_syndactylus )52 Nomascus_leucogenys )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )99 )100 )99 ((Hylobates_agilis Symphalangus_syndactylus )43 Nomascus_leucogenys )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Hylobates_agilis Symphalangus_syndactylus )62 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )91 )100 )98 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Hylobates_agilis Symphalangus_syndactylus )54 )98 (Pongo_abelii (Homo_sapiens (Gorilla_gorilla Pan_troglodytes_troglodytes )48 )100 )84 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Symphalangus_syndactylus Hylobates_agilis )64 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )100 )100 )99 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Symphalangus_syndactylus (Hylobates_agilis Nomascus_leucogenys )65 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )76 )100 )99 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Symphalangus_syndactylus Hylobates_agilis )65 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )84 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )98 )100 )94 ((Hylobates_agilis Symphalangus_syndactylus )40 Nomascus_leucogenys )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Symphalangus_syndactylus (Hylobates_agilis Nomascus_leucogenys )53 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )98 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Symphalangus_syndactylus Hylobates_agilis )58 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )89 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Hylobates_agilis Symphalangus_syndactylus )77 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )91 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Hylobates_agilis Symphalangus_syndactylus )52 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )89 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Hylobates_agilis Symphalangus_syndactylus )71 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )96 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Symphalangus_syndactylus Hylobates_agilis )59 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )92 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Hylobates_agilis Symphalangus_syndactylus )67 )100 (Pongo_abelii (Homo_sapiens (Pan_troglodytes_troglodytes Gorilla_gorilla )83 )100 )82 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Symphalangus_syndactylus Hylobates_agilis )70 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )99 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Hylobates_agilis Symphalangus_syndactylus )54 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )100 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Symphalangus_syndactylus Hylobates_agilis )63 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )92 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Hylobates_agilis Symphalangus_syndactylus )57 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )99 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Hylobates_agilis Symphalangus_syndactylus )62 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )99 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Hylobates_agilis Symphalangus_syndactylus )56 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )100 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Symphalangus_syndactylus Hylobates_agilis )63 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )99 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Symphalangus_syndactylus Hylobates_agilis )57 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )93 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )95 )100 )100 ((Hylobates_agilis Symphalangus_syndactylus )39 Nomascus_leucogenys )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Hylobates_agilis Symphalangus_syndactylus )68 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )97 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Hylobates_agilis Symphalangus_syndactylus )49 )100 ((Pan_troglodytes_troglodytes (Homo_sapiens Gorilla_gorilla )48 )100 Pongo_abelii )61 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Symphalangus_syndactylus Hylobates_agilis )63 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )96 )100 )100 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Symphalangus_syndactylus (Hylobates_agilis Nomascus_leucogenys )97 )100 (Pongo_abelii (Gorilla_gorilla (Homo_sapiens Pan_troglodytes_troglodytes )73 )100 )97 )100 )\n\n" "(Macaca_mulatta Colobus_angolensis_palliatus ((Nomascus_leucogenys (Hylobates_agilis Symphalangus_syndactylus )81 )100 (Pongo_abelii (Gorilla_gorilla (Pan_troglodytes_troglodytes Homo_sapiens )54 )100 )72 )100 )\n\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