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
Processing...

Test String

Code Generator

Language

Generated Code

import re regex = re.compile(r"(([a-z]*[.:]*)\s*((\d*[.]\d*)+$))", flags=re.IGNORECASE | re.MULTILINE) test_str = ("\"LOWE’S HOME CENTERS, INC.\n" "5770 READ BOULEUARD NEW ORLEANS, LA 70127 (504) 613-1800\n" "- SALE - SALES 4: S2690BC1 1295021 07-17-10\n" "296458 COMM SERIES QUANTUM 3 BUR 149.00\n" "SUBTOTAL: 149.00\n" "TAX: 13.41\n" "INUOICE 18327 TOTAL: 162.41\n" "MERCH/GIFT CARDS : 162.41\n" "MERCH/GIFT CARD 7334 AUTHCODE 005450 BEGIN BAL TRANSACTION AMT ENDING BAL 216.91 162.41 54.50\n" "STORE: 2690 TERMINAL: 18 07/17/10 09:13:09\n" "OF ITEMS PURCHASED: 1\"\n" "Grocery_receipts_001.docx.txt,\"Walmart x'c\n" "Save money. Live better. •\n" "(813) 932-0562 Manager COLLEEN BRICKEY 8885 N FLORIDA AVE TAMPA FL 33604\n" "ST# 5221 OP#\n" " 00001061 TE# 06\n" " TR# 05332\n" " BREAD\n" " 007225003712 F\n" " 2.88\n" " N\n" " BREAD\n" " 007225003712 F\n" " 2.88\n" " N\n" " GV PNT BUTTR\n" " 007874237003 F\n" " 3.84\n" " N\n" " GV PNT BUTTR\n" " 007874237003 F\n" " 3.84\n" " N\n" " GV PNT BUTTR\n" " 007874237003 F\n" " 3.84\n" " N\n" " GV PNT BUTTR\n" " 007874237003 F\n" " 3.84\n" " N\n" " GV PARM 160Z\n" " 007874201510 F\n" " 4.98\n" " 0\n" " GV CHNK CHKN\n" " 007874206784 F\n" " 1.98\n" " N\n" " GV CHNK CHKN\n" " 007874206784 F\n" " 1.98\n" " N\n" " 12 CT NITRIL\n" " 073191913822\n" " 2.78\n" " X\n" " FOLGERS\n" " 002550000377 F\n" " 10.48\n" " N\n" " SC TUIST UP\n" " 007874222682 F\n" " 0.84\n" " X\n" " EGGS\n" " 060538871459 F\n" " 1.88\n" " 0\n" " \n\n" " SUBTOTAL\n" " 46.04\n" " \n\n" " TAX\n" " 1 7.000 X\n" " 0.26\n" " \n\n" " \n\n" " TOTAL\n" " 46.30\n" " \n\n" " \n\n" " DEBIT TEND\n" " 46.30\n" " \n\n" " \n\n" " CHANGE DUE\n" " 0.00\n" " \n\n" " \n\n" "EFT DEBIT PAY FROM PRIMARY\n" "ACCOUNT : 5259\n" "1. TOTAL PURCHASE\n" "PAYMENT DECLINED DEBIT NOT AVAILABLE 11/06/11 02:21:54\n" "EFT DEBIT PAY FROM PRIMARY\n" "ACCOUNT : 5259\n" "1. TOTAL PURCHASE REF # 131000195280\n" "NETWORK ID. 0071 APPR CODE 297664 11/06/11 02:22:54\n\n" "ft ITEMS SOLD 13\n" "TC# 0432 2121 1542 2401 9590\n" " \n\n" "Lagawag Is back for Electronics, Togs, and Jewelrg. 10/17/11-12/16/11 11/06/11 02:22:59\"\n" "traderjoes-receipt1.docx.txt,\"TRADER JOE’S\n\n\n\n\n\n\n\n\n\n\n" " \n\n" "“V.\n" "\\L3P\n" "2-49 T 0.10 T\n" "OPEN 8:00AM TO 10:00PM DAILY\n" "* LOWFAT 1% MILK - HALF GALLON ^GROCERY NON TAXABLE\n" "1. 6 0.59 ^GROCERY NON TAXABLE\n" "2. 10.19 GROCERY NON TAXABLE\n" "^ MISSISSIPPI MUD 32 OZ CROCK\n" "* CRY\n" "“• TJ!S VEGGIE STIX £ BAGEL MINI WHEAT 4 PK\n" "* CHICKEN CH2 YMEIN STIR FRY MIX\n" "* PIZZA ORGANIC SICILIA?? STYLE R « TJ'S CHEESE & GARLIC CROUTONS\n" "* LA GRANJA SYRAH LES CAVES JOSEPH BORDEAUX\n" "* CHICKEN ORANGE MANDARIN W/SCE\n" "* DARK CHOCOLATE ROCKY ROAD SQUA\n" " \n\n" "* RESTAURANT-STYLE WHITE CHIPS ~ SLICED TURKEY ROASTED o CRACKERS MULTIGRAIN ^ SALSA CHIPOTLE HOT -FRESH PK BOYSENBERRY PRESERVES\n" "* CHUNKY SALTED PEANUT BUTTER\n" "* TJ SLICED JACK W/PEPPERS «* SORRENTO SALAD TJ'S\n" "* CHOC BAR FLD'DRKSPEC « CHOC BAR FLD DRKSPEC\n" "$66.87\n" "$0.91\n" "$67.78\n" "$67.78\n" "SUBTOTAL STATE TAX 1 TOTAL DEBIT\n" "PURCHASE SWIPED AUTH# 402241 INVOICE #: 5876\n" ",199,,00,\n" "02-09-2012 06:45PM REFERENCE #: 293536\n\n\n" "ITEMS 33 S, Christian\n" "02-09-2012 06:43PM 0199 04 0098 5876\n" "THANK YOU FOR SHOPPING AT TRADER JOE'S www.traderjoes.com\"\n" "transaction-1.docx.txt,\"The Pharmacy America Trusts • Since 1901\"\"\n" "I'm MARILYN. Thank you for allowing me to serve you today,\n" "502 10 9032 05988 027\n" "RFN# 0598-8279-0320-1003-2820\n" "F SMPLY SLN ALL4.25Z 1A 7.00 SALE\n" "F DULC0LAX 8.30Z 1A 10.00 SALE\n" "DOVE TRTMN M0IST8Z 1A 4.00 SALE\n" "MFG COUPON 1 1.50-MFGC\n" "MFG COUPON 1 4.00-MFGC\n" "MFG COUPON 1 5.00-MFGC\n" "SUBTOTAL 10.50\n" "A-6.85% SALES TAX TOTAL\n" "CASH 12.00\n" "CHANGE .06\n" "HAG ADVERTISED SAVINGS: 7.97\n" "MFG COUPON SAVINGS: 10.50\n" "YOUR TOTAL SAVINGS: 18.47\n") matches = regex.finditer(test_str) for match_num, match in enumerate(matches, start=1): print(f"Match {match_num} was found at {match.start()}-{match.end()}: {match.group()}") for group_num, group in enumerate(match.groups(), start=1): print(f"Group {group_num} found at {match.start(group_num)}-{match.end(group_num)}: {group}")

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