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

r"
"
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"(droit d'entr[ée]e)\s?(\W|du|de|fix[eé] [aà]|[aà]|est de)? (\d+.\d+|\d+\s\d+)" test_str = ("[DROIT D'ENTREE]\n\n" "droit d'entrée de 100000 € \n" "droit d'entrée : 100 000€ \n" "droit d'entrée à 150 000 € \n" "droit d'entrée 102000€ \n" "droit d'entrée = 200.000 € \n" "droit d'entrée fixé à 200000 € \n" "droit d'entrée fixé à 200000 EUR\n" "droit d'entrée fixé à 200000 euro\n" "droit d'entrée : nous consulter \n" "Prix droit d'entrée : 230 000 euros net vendeur\n" "droit d'entrée : 100 000 euros HD\n" "Prix droit d'entrée : 26 000 euros honoraires à charge vendeur\n" "droit d'entrée : 100 000 euros FAI\n" "droit d'entrée : 298.000euros honoraires charge vendeur.\n" "la droit d'entrée est de 85 000 euros Hors Honoraires\n" "droit d'entrée de 23 000€ net vendeur\n" "droit d'entrée 62 000 euros\n\n" "[NE PAS PRENDRE EN COMPTE]\n\n" "pas de droit d'entrée\n" "sans droit d'entrée\n" "sans aucun droit d'entrée \n" "aucun droit d'entrée \n" "pas de droit d'entrée \n" "droit d'entrée : néant \n\n\n\n\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