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"(?<=\D{3}.\d{2}.\d{4}).*(?<=\D)" test_str = ("Ｉ Ｎ Ｖ Ｏ Ｉ Ｃ Ｅ **** JUL.19,2022\n" "Ｄ Ａ Ｔ Ｅ ：\n" "1-21, SHIBAURA 3-CHOME,MINATO-KU,TOKYO, JAPAN\n" "NN390\n" "ＩＮＶＯＩＣＥ　ＮＯ．\n" "MITSUBISHI MOTORS AUSTRALIA LIMITED.\n" "1 SIR RICHARD WILLIAMS AVENUE,\n" "ADELAIDE AIRPORT SA 5950 AUSTRALIA\n" "ＮＡＭＥ　ＯＦ　ＶＥＳＳＥＬ ＯＮ　ＯＲ　ＡＢＯＵＴ ＬＯＡＤＩＮＧ　ＰＯＲＴ\n" "OOCL NEW ZEALAND 115S JUL.30,2022 NAGOYA,JAPAN\n" "ＤＩＳＣＨＡＲＧＩＮＧ　ＰＯＲＴ ＩＮＳＵＲＡＮＣＥ\n" "FREMANTLE,AUSTRALIA\n" "COVERED BY SHIPPER\n" "ＰＡＹＭＥＮＴ　ＴＥＲＭＳ\n" "REMITTANCE AT 45 DAYS AFTER B/L DATE\n" "ＭＡＲＫ　＆　ＮＯＳ ＤＥＳＣＲＩＰＴＩＯＮ ＱＵＡＮＴＩＴＹ ＵＮＩＴ　ＰＲＩＣＥ ＡＭＯＵＮＴ\n" "-AS PER SPARE PARTS FOR\n" "ATTACHED SHEET- MITSUBISHI VEHICLES\n" "PCS AUS.DOLLARS\n" "*** ***********\n" "FOB NET 2,553 75,622.32*\n" "PACKING CHARGE 529.36*\n" "FOB NAGOYA JAPAN 76,151.68*\n" "INSURANCE 380.76*\n" "C&I FREMANTLE 76,532.44*\n" "**********\n" "\"WE DECLARE THAT THE MACHINERY AND/OR PARTS AND\n" "ACCESSORIES ARE NEW AND UNUSED AND HAVE NOT BEEN FIELD\n" "TESTED OR FACTORY TRIALLED\"\n" "PACKING LIST\n" "LOT NO C/S NO GROSS WT NET WT M/M\n" "MASAYUKI SHIBUYA GENERAL MANAGER\n" "GLOBAL AFTER SALES LOGISTICS DEPARTMENT\n" "GLOBAL AFTER SALES DIVISION\n" "MITSUBISHI MOTORS CORPORATION\n" "ＡＶ ０\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