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"(?P<name>^[A-Za-z\/()\'’, -]+)(\s\d{2}|\s[1-9])?\s?(\s(?P<d1>-[\d,]+|[\d,.]+)\s(?P<d2>-[\d,]+|[\d,.]+))" test_str = ("38\n" "Frontken Corporation Berhad -651020-T Annual Report 2010\n" "STATEMENTS OF FINANCIAL POSITION\n" "AS OF 31 DECEMBER 2010\n" "The Group The Company\n" "Restated Restated\n" "RM RM RM RM RM\n" "ASSETS\n" "Non-Current Assets\n" "Property, plant and equipment 10 178,405,029 116,971,685 112,532,450 190,014 100,755\n" "Prepaid lease payments 11 0 0 0 0 0\n" "Investment in subsidiaries 12 0 0 0 68,192,335 30,903,191\n" "Investment in associates 13 4,494,255 46,538,503 48,192,140 0 22,955,162\n" "Goodwill on consolidation 14 28,311,674 4,724,073 3,749,020 0 0\n" "Intangible assets 15 0 0 0 0 0\n" "Deferred tax assets 16 352,360 0 0 0 0\n" "Current Assets\n" "Inventories 17 10,431,408 8,925,542 9,044,623 0 0\n" "Amount due from contract customers 0 0 668,875 0 0\n" "Trade receivables 18 67,337,237 36,900,201 41,323,668 0 0\n" "Other receivables and prepaid expenses 18 5,125,566 5,285,410 10,169,824 27,841 43,427\n" "Amount owing by subsidiaries 19 0 0 0 45,680,029 43,607,599\n" "Amount owing by associates 13 4,534,039 2,098,465 3,500,059 0 0\n" "Fixed deposits with licensed banks 12,684,190 781,627 758,232 12,000,000 0\n" "Cash and bank balances 21,515,759 12,770,709 10,440,412 1,474,363 200,943\n" "EQUITY AND LIABILITIES\n" "Equity\n" "Share capital 20 101,140,816 72,243,440 69,977,040 101,140,816 72,243,440\n" "Reserves 21 75,102,500 63,104,940 51,689,521 9,444,784 6,607,044\n" "Minority interests 25,901,844 182,232 651,874 0 0\n" "Non-Current Liabilities\n" "Term loans 22 48,314,340 25,265,019 33,200,474 0 0\n" "Hire purchase payables 23 9,867,784 14,596,712 12,091,335 0 0\n" "Deferred tax liabilities 16 4,389,835 3,789,267 3,466,075 0 0\n" "Frontken Corporation Berhad -651020-T Annual Report 2010\n" "STATEMENTS OF FINANCIAL POSITION\n" "AS OF 31 DECEMBER 2010 (CONT’D)\n" "The Group The Company\n" "Restated Restated\n" "RM RM RM RM RM\n" "Current Liabilities\n" "Amount due to contract customers 24 0 47,202 0 0 0\n" "Trade payables 25 20,502,454 12,556,468 19,452,763 0 0\n" "Other payables and accrued expenses 25 16,264,903 12,506,798 18,195,181 310,144 253,253\n" "Amount owing to subsidiaries 19 0 0 0 16,668,838 18,707,340\n" "Amount owing to associates 13 0 117,594 300,858 0 0\n" "Bank overdrafts 26 1,230,283 3,365,362 5,617,839 0 0\n" "Bank borrowings 26 22,132,228 18,367,015 18,471,490 0 0\n" "Deferred income 0 0 19,248 0 0\n" "Hire purchase payables 23 7,249,505 8,223,614 5,906,750 0 0\n" "Tax liabilities 1,095,025 630,552 1,338,855 0 0") 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