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

/
/
imgu

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"^(?<streetName>.*?)(\s((nr|n|no)\.?\s*)?(?<houseNumber>[1-9][0-9]*)(\s*[-\/]\s*(?<houseNumberTo>[1-9][0-9]*))?([\s-\/]*(?<houseLetter>[a-z]))?([\s\-]+(?<houseNumberAddition>[a-z1-9][a-z0-9\/]*[a-z]+))?)?$" test_str = ("Geldersekade 5\n" "Prins Hendrikkade 94-95\n" "Zeedijk 39 a\n" "Prins Hendrikkade 85\n" "Kromme Waal 24 t/o\n" "Oude Waal 26 sous\n" "Recht Boomssloot 50-b\n" "Oudeschans 5a\n" "Blaak 5a\n" "çstraét 12\n" "Æbçøüdéstrāßè 12\n" "binnenbantammer straat n.2\n" "Oudezijds Voorburgwal 36-HS\n" "De Ruijterkade 105 1S\n" "De Ruijterkade 110H\n" "Prins Hendrikkade 133 3A\n" "Plein 1818 2a\n" "Scheveningseveer 21\n" "De Stelling 15 11\n" "Plein ’40-’45 nr. 9\n" "Burg.de Vlugtlaan 139\n" "Plein ‘40-’45 6\n" "Plein 18 1\n" "Plein 1953 2\n" "Plein 1953 28\n" "Plein 1337 4-c\n" "Plein 1337 4 1d\n" "Regulieersdwarsstraat 5-1\n" "Regulieersdwarsstraat 5-1c\n" "Regulieersdwarsstraat 5 1x\n" "Rechte boom straat 5001 33\n" "Plein 2001 22-44\n" "Plein1234 4\n" "Hesseplaats 53\n" "1e middellandstraat 12\n" "Prins Hendrikkade 4/A\n" "Langerakplein 22/44 \n" "Roer 266\n" "3 Spinel\n" "Roer\n") matches = re.finditer(regex, test_str, re.IGNORECASE | re.MULTILINE | re.UNICODE) 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