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
  • Match everything enclosed
    (?:...)
  • Capture everything enclosed
    (...)
  • 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

/
/
gm

Test String

Code Generator

Generated Code

# coding=utf8 # the above tag defines encoding for this document and is for Python 2.x compatibility import re regex = r"^.*TELEPHONE NUMBER(.*)DATE ACCOUNT OPENED(.*)LANG CODE(.*)CHAIN CODE(.*)TRANSIT ROUTING NUM(.*)DATE OF LAST REVIEW(.*)DATE OF NEXT REVIEW(.*)ALT TRANSIT ROUTING NUM(.*)AVERAGE FLOAT DAYS(.*)SPECIAL CONTROL FLAGS(.*)SEASONAL MERCHANT(.*)STATEMENT HOLD CODE(.*)SEND ACQUIRER(.*)STATEMENT MAIL FLAG(.*)MONTHLY ACH FLAG(.*)MERCHANT NAME(.*)MERCHANT TYPE(.*)DDA NUMBER(.*)ALT DDA NUMBER(.*)AUTH INC GRID(.*)AUTH EXP GRID(.*)CROSS REFERENCE NO.(.*)ETC NON FDR FLAG(.*)ETC VENDOR ID(.*)SALES RESPONSIBILITY(.*)USER DEF INC GRID(.*)USER DEF EXP GRID(.*)TAXPAYER ID(.*)ACCOUNT1 FEE FLAG(.*)ACCOUNT1 START(.*)STOP(.*)MRCH ADV FLAG(.*)ACCOUNT2 FEE FLAG(.*)ACCOUNT2 START(.*)STOP(.*)TERMINAL START(.*)STOP(.*)ACCOUNT3 FEE FLAG(.*)ACCOUNT3 START(.*)STOP(.*)SPARK EXCLUSION CD(.*)ACCOUNT4 FEE FLAG(.*)ACCOUNT4 START(.*)STOP(.*)PAYEE FLAG CD(.*)ACCOUNT5 FEE FLAG(.*)ACCOUNT5 START(.*)STOP(.*)EIDS IND(.*)RECURRING FEE FLAG(.*)RECURRING FEE IND(.*)BUW INDICATOR(.*)TURF CD(.*)TURF EFF DT(.*)TAX EFF YEAR(.*)BANKCARD DBA(.*)TIMS ACCT ID(.*) RETAIL DBA(.*)CUST BUSINESS ID(.*)CUST BUS RELATIONSHIP CD(.*)DEPOSIT TYPE(.*)ETC ACCOUNT TYPE(.*)DEVICE TYPE(.*)EXCLUDE ADJ FLAG(.*)MC\/V POS(.*)DISCOUNT CALCULATION(.*)ROUND DISCOUNT(.*)REBATE DISTRIBUTE(.*)REBATE OPTION(.*)REBATE PERIOD(.*)" test_str = ("0 TELEPHONE NUMBER 612-874-8702 DATE ACCOUNT OPENED 01/27/14\n" " LANG CODE - EN CHAIN CODE TRANSIT ROUTING NUM 96001013\n" " DATE OF LAST REVIEW 00/00 DATE OF NEXT REVIEW 01/15 ALT TRANSIT ROUTING NUM\n" " AVERAGE FLOAT DAYS 00-00 SPECIAL CONTROL FLAGS SEASONAL MERCHANT NO\n" " STATEMENT HOLD CODE Y - SEND ACQUIRER STATEMENT MAIL FLAG M - MERCH ADDRESS MONTHLY ACH FLAG 1 - MERCHANT NAME\n" " MERCHANT TYPE REGULAR DDA NUMBER 12000069001 ALT DDA NUMBER\n" " AUTH INC GRID P801 AUTH EXP GRID 000 CROSS REFERENCE NO. 0000326\n" " ETC NON FDR FLAG N ETC VENDOR ID SALES RESPONSIBILITY 0001\n" " USER DEF INC GRID 000 USER DEF EXP GRID 000 TAXPAYER ID 30-0016022\n" " ACCOUNT1 FEE FLAG 3 ACCOUNT1 START 00/00 STOP 00/00 MRCH ADV FLAG 0\n" " ACCOUNT2 FEE FLAG 1 ACCOUNT2 START 00/00 STOP 00/00 TERMINAL START 00/00 STOP 00/00\n" " ACCOUNT3 FEE FLAG 1 ACCOUNT3 START 00/00 STOP 05/17 SPARK EXCLUSION CD N\n" " ACCOUNT4 FEE FLAG 0 ACCOUNT4 START 00/00 STOP 00/00 PAYEE FLAG CD S\n" " ACCOUNT5 FEE FLAG 1 ACCOUNT5 START 00/00 STOP 00/00 EIDS IND N\n" " RECURRING FEE FLAG RECURRING FEE IND BUW INDICATOR\n" " TURF CD A TURF EFF DT 00/00/0000 TAX EFF YEAR 0000\n" " BANKCARD DBA - ACADIA CAFE /MINNEAPOLIS /MN TIMS ACCT ID O0529808390100022000\n" " RETAIL DBA - ACADIA CAFE MINNEAPOLIS MN\n" " CUST BUSINESS ID CUST BUS RELATIONSHIP CD\n" " - - - - - - - - - - - - - - - - - - - - - - - - - - - - MERCHANT OPTIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - -\n" " DEPOSIT TYPE 3 - ETC ETC ACCOUNT TYPE 7 - RESERVED DEVICE TYPE NONE\n" " EXCLUDE ADJ FLAG Y - EXCL ADJ/CB MC/V POS 0922\n" " DISCOUNT CALCULATION - 2 ROUND DISCOUNT - N\n" " REBATE DISTRIBUTE REBATE OPTION N - NO REBATE REBATE PERIOD ") 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