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"
"

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"(?s)^(?=.* ABN \d{2}(?: \d{3}){3}\n(?P<products>.*\n)Qty\n).*\n\$\d+\.\d{2}\n(?P<subtotal>\d+) +SUBTOTAL\.*\nTOTAL\n\$(?P<total>\d+\.\d{2})\n" test_str = ("ㅎㅎ\n" "Fresh Food\n" "The fresh food people\n" "5619 Lorem PH: 00 0000 0000\n" "204 Some Road\n" "TAX INVOICE - ABN 88 000 014 675\n" "Gift Card Visa Varbl 20to500Dollars\n" "Potato White Washed 2Kg\n" "Nescafe Coffee Blend 43 50g\n" "^HToblerone Milk Chocolate Bar 50g\n" "^HOreo Cookie Original 133g\n" "#M&Ms Crispy 145g\n" "*HRed Rock Deli Portgse Chicken 150g\n" "^HWrigleys Extra Pepprmint 14pc 27g(?.*\n" "Qty\n" "57.95\n" "3.50\n" "5.00\n" "0.90\n" "1.50\n" "4.50\n" "3.50\n" "2 @ $1.80\n" "each\n" "3.60\n" "$80.45\n" "9 SUBTOTAL\n" "TOTAL\n" "$80.45\n" "REWARDS SAVINGS\n" "$10.00\n" "Fresh Food\n" "5619\n" "Lorem") matches = re.search(regex, test_str) if matches: print ("Match was found at {start}-{end}: {match}".format(start = matches.start(), end = matches.end(), match = matches.group())) for groupNum in range(0, len(matches.groups())): groupNum = groupNum + 1 print ("Group {groupNum} found at {start}-{end}: {group}".format(groupNum = groupNum, start = matches.start(groupNum), end = matches.end(groupNum), group = matches.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