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"(?<=[\,\"])[^\,\"]+\[[A-Z]{2}\]", flags=re.MULTILINE) test_str = "{\"state\": \"AL\", \"year\": 2020, \"events\": [{\"phenomena\": \"SV\", \"significance\": \"A\", \"eventid\": 34, \"hvtec_nwsli\": null, \"area\": 20747.0, \"locations\": \"Franklin [AL], Limestone [AL], Colbert [AL], Jackson [AL], Madison [AL], DeKalb [AL], Lawrence [AL], Lauderdale [AL], Morgan [AL], Cullman [AL], Marshall [AL]\", \"issue\": \"2020-02-12T22:34:00Z\", \"product_issue\": \"2020-02-12T22:34:00Z\", \"expire\": \"2020-02-13T03:27:00Z\", \"init_expire\": \"2020-02-13T06:00:00Z\", \"uri\": \"/vtec/#2020-O-NEW-KHUN-SV-A-0034\", \"wfo\": \"HUN\"}, {\"phenomena\": \"SV\", \"significance\": \"A\", \"eventid\": 34, \"hvtec_nwsli\": null, \"area\": 33422.0, \"locations\": \"Tuscaloosa [AL], Greene [AL], Bibb [AL], Shelby [AL], Sumter [AL], Winston [AL], Cherokee [AL], Lamar [AL], Blount [AL], Etowah [AL], Walker [AL], Fayette [AL], St. Clair [AL], Marion [AL], Jefferson [AL], Pickens [AL], Hale [AL]\", \"issue\": \"2020-02-12T22:35:00Z\", \"product_issue\": \"2020-02-12T22:35:00Z\", \"expire\": \"2020-02-13T03:02:00Z\", \"init_expire\": \"2020-02-13T06:00:00Z\", \"uri\": \"/vtec/#2020-O-NEW-KBMX-SV-A-0034\", \"wfo\": \"BMX\"}, {\"phenomena\": \"SV\", \"significance\": \"A\", \"eventid\": 41, \"hvtec_nwsli\": null, \"area\": 28974.0, \"locations\": \"Pike [AL], Elmore [AL], Dallas [AL], Bullock [AL], Montgomery [AL], Perry [AL], Autauga [AL], Marengo [AL], Barbour [AL], Lowndes [AL], Sumter [AL], Macon [AL], Greene [AL], Hale [AL], Russell [AL]\", \"issue\": \"2020-03-04T08:39:00Z\", \"product_issue\": \"2020-03-04T08:39:00Z\", \"expire\": \"2020-03-04T14:29:00Z\", \"init_expire\": \"2020-03-04T16:00:00Z\", \"uri\": \"/vtec/#2020-O-NEW-KBMX-SV-A-0041\", \"wfo\": \"BMX\"}, {\"phenomena\": \"SV\", \"significance\": \"A\", \"eventid\": 45, \"hvtec_nwsli\": null, \"area\": 26481.0, \"locations\": \"Tuscaloosa [AL], Hale [AL], Walker [AL], Fayette [AL], Winston [AL], Lamar [AL], Perry [AL], Bibb [AL], Pickens [AL], Greene [AL], Marengo [AL], Marion [AL], Sumter [AL]\", \"issue\": \"2020-03-11T17:26:00Z\", \"product_issue\": \"2020-03-11T17:26:00Z\", \"expire\": \"2020-03-11T22:42:00Z\", \"init_expire\": \"2020-03-12T00:00:00Z\", \"uri\": \"/vtec/#2020-O-NEW-KBMX-SV-A-0045\", \"wfo\": \"BMX\"}, {\"phenomena\": \"SV\", \"significance\": \"A\", \"eventid\": 88, \"hvtec_nwsli\": null, \"area\": 55154.0, \"locations\": \"Bibb [AL], Dallas [AL], Randolph [AL], Shelby [AL], Greene [AL], Pickens [AL], Montgomery [AL], Elmore [AL], Russell [AL], Tallapoosa [AL], Perry [AL], Chambers [AL], Clay [AL], Lowndes [AL], Sumter [AL], Macon [AL], Talladega [AL], Chilton [AL], Coosa [AL], Lee [AL], Pike [AL], Marengo [AL], Barbour [AL], Tuscaloosa [AL], Autauga [AL], Jefferson [AL], Hale [AL], Bullock [AL]\", \"issue\": \"2020-04-08T19:41:00Z\", \"product_issue\": \"2020-04-08T19:41:00Z\", \"expire\": \"2020-04-08T23:58:00Z\", \"init_expire\": \"2020-04-09T02:00:00Z\", \"uri\": \"/vtec/#2020-O-NEW-KBMX-SV-A-0088\", \"wfo\": \"BMX\"}, {\"phenomena\": \"SV\", \"significance\": \"A\", \"eventid\": 88, \"hvtec_nwsli\": null, \"area\": 16510.0, \"locations\": \"Choctaw [AL], Clarke [AL], Butler [AL], Conecuh [AL], Crenshaw [AL], Wilcox [AL], Monroe [AL]\", \"issue\": \"2020-04-08T19:41:00Z\", \"product_issue\": \"2020-04-08T19:41:00Z\", \"expire\": \"2020-04-08T23:50:00Z\", \"init_expire\": \"2020-04-09T02:00:00Z\", \"uri\": \"/vtec/#2020-O-NEW-KMOB-SV-A-0088\", \"wfo\": \"MOB\"}, {\"phenomena\": \"SV\", \"significance\": \"A\", \"eventid\": 94, \"hvtec_nwsli\": null, \"area\": 20747.0, \"locations\": \"Franklin [AL], Madison [AL], Lauderdale [AL], Cullman [AL], Colbert [AL], Marshall [AL], Jackson [AL], DeKalb [AL], Morgan [AL], Lawrence [AL], Limestone [AL]\", \"issue\": \"2020-04-09T03:17:00Z\", \"product_issue\": \"2020-04-09T03:17:00Z\", \"expire\": \"2020-04-09T08:00:00Z\", \"init_expire\": \"2020-04-09T10:00:00Z\", \"uri\": \"/vtec/#2020-O-NEW-KHUN-SV-A-0094\", \"wfo\": \"HUN\"}, {\"phenomena\": \"SV\", \"significance\": \"A\", \"eventid\": 142, \"hvtec_nwsli\": null, \"area\": 10846.0, \"locations\": \"Clarke [AL], Wilcox [AL], Choctaw [AL], Washington [AL]\", \"issue\": \"2020-04-23T21:06:00Z\", \"product_issue\": \"2020-04-23T21:06:00Z\", \"expire\": \"2020-04-23T22:56:00Z\", \"init_expire\": \"2020-04-24T02:00:00Z\", \"uri\": \"/vtec/#2020-O-NEW-KMOB-SV-A-0142\", \"wfo\": \"MOB\"}, {\"phenomena\": \"SV\", \"significance\": \"A\", \"eventid\": 142, \"hvtec_nwsli\": null, \"area\": 35385.0, \"locations\": \"Perry [AL], Randolph [AL], Chambers [AL], Autauga [AL], Clay [AL], Bibb [AL], Coosa [AL], Greene [AL], Sumter [AL], Dallas [AL], Chilton [AL], Tallapoosa [AL], Shelby [AL], Elmore [AL], Talladega [AL], Hale [AL], Lee [AL], Lowndes [AL], Marengo [AL]\", \"issue\": \"2020-04-23T21:07:00Z\", \"product_issue\": \"2020-04-23T21:07:00Z\", \"expire\": \"2020-04-23T22:59:00Z\", \"init_expire\": \"2020-04-24T02:00:00Z\", \"uri\": \"/vtec/#2020-O-NEW-KBMX-SV-A-0142\", \"wfo\": \"BMX\"}, {\"phenomena\": \"SV\", \"significance\": \"A\", \"eventid\": 159, \"hvtec_nwsli\": null, \"area\": 8458.0, \"locations\": \"Madison [AL], Limestone [AL], Lauderdale [AL], Jackson [AL]\", \"issue\": \"2020-05-03T20:43:00Z\", \"product_issue\": \"2020-05-03T20:43:00Z\", \"expire\": \"2020-05-04T01:00:00Z\", \"init_expire\": \"2020-05-04T01:00:00Z\", \"uri\": \"/vtec/#2020-O-NEW-KHUN-SV-A-0159\", \"wfo\": \"HUN\"}, {\"phenomena\": \"SV\", \"significance\": \"A\", \"eventid\": 166, \"hvtec_nwsli\": null, \"area\": 10475.0, \"locations\": \"Madison [AL], Limestone [AL], Lauderdale [AL], Jackson [AL], DeKalb [AL]\", \"issue\": \"2020-05-04T23:42:00Z\", \"product_issue\": \"2020-05-04T23:42:00Z\", \"expire\": \"2020-05-05T04:00:00Z\", \"init_expire\": \"2020-05-05T05:00:00Z\", \"uri\": \"/vtec/#2020-O-NEW-KHUN-SV-A-0166\", \"wfo\": \"HUN\"}, {\"phenomena\": \"SV\", \"significance\": \"A\", \"eventid\": 300, \"hvtec_nwsli\": null, \"area\": 14523.0, \"locations\": \"Barbour [AL], Bullock [AL], Montgomery [AL], Lowndes [AL], Macon [AL], Russell [AL], Lee [AL], Pike [AL]\", \"issue\": \"2020-06-24T18:36:00Z\", \"product_issue\": \"2020-06-24T18:36:00Z\", \"expire\": \"2020-06-24T23:08:00Z\", \"init_expire\": \"2020-06-25T02:00:00Z\", \"uri\": \"/vtec/#2020-O-NEW-KBMX-SV-A-0300\", \"wfo\": \"BMX\"}, {\"phenomena\": \"SV\", \"significance\": \"A\", \"eventid\": 300, \"hvtec_nwsli\": null, \"area\": 29503.0, \"locations\": \"Monroe [AL], Mobile [AL], Wilcox [AL], Escambia [AL], Crenshaw [AL], Baldwin [AL], Conecuh [AL], Covington [AL], Butler [AL], Clarke [AL], Washington [AL]\", \"issue\": \"2020-06-24T18:36:00Z\", \"product_issue\": \"2020-06-24T18:36:00Z\", \"expire\": \"2020-06-24T23:18:00Z\", \"init_expire\": \"2020-06-25T02:00:00Z\", \"uri\": \"/vtec/#2020-O-NEW-KMOB-SV-A-0300\", \"wfo\": \"MOB\"}, {\"phenomena\": \"SV\", \"significance\": \"A\", \"eventid\": 300, \"hvtec_nwsli\": null, \"area\": 7704.0, \"locations\": \"Coffee [AL], Geneva [AL], Dale [AL], Henry [AL], Houston [AL]\", \"issue\": \"2020-06-24T18:40:00Z\", \"product_issue\": \"2020-06-24T18:40:00Z\", \"expire\": \"2020-06-25T00:38:00Z\", \"init_expire\": \"2020-06-25T02:00:00Z\", \"uri\": \"/vtec/#2020-O-NEW-KTAE-SV-A-0300\", \"wfo\": \"TAE\"}, {\"phenomena\": \"SV\", \"significance\": \"A\", \"eventid\": 362, \"hvtec_nwsli\": null, \"area\": 66859.0, \"locations\": \"Bibb [AL], Walker [AL], Elmore [AL], Pickens [AL], Fayette [AL], Chambers [AL], St. Clair [AL], Tuscaloosa [AL], Russell [AL], Tallapoosa [AL], Greene [AL], Hale [AL], Jefferson [AL], Calhoun [AL], Lamar [AL], Coosa [AL], Lee [AL], Cleburne [AL], Macon [AL], Perry [AL], Clay [AL], Sumter [AL], Lowndes [AL], Pike [AL], Barbour [AL], Autauga [AL], Marengo [AL], Randolph [AL], Bullock [AL], Montgomery [AL], Dallas [AL], Talladega [AL], Blount [AL], Shelby [AL], Chilton [AL]\", \"issue\": \"2020-07-12T17:12:00Z\", \"product_issue\": \"2020-07-12T17:12:00Z\", \"expire\": \"2020-07-12T23:29:00Z\", \"init_expire\": \"2020-07-13T00:00:00Z\", \"uri\": \"/vtec/#2020-O-NEW-KBMX-SV-A-0362\", \"wfo\": \"BMX\"}, {\"phenomena\": \"SV\", \"significance\": \"A\", \"eventid\": 364, \"hvtec_nwsli\": null, \"area\": 7704.0, \"locations\": \"Coffee [AL], Dale [AL], Henry [AL], Geneva [AL], Houston [AL]\", \"issue\": \"2020-07-12T20:40:00Z\", \"product_issue\": \"2020-07-12T20:40:00Z\", \"expire\": \"2020-07-13T01:46:00Z\", \"init_expire\": \"2020-07-13T03:00:00Z\", \"uri\": \"/vtec/#2020-O-NEW-KTAE-SV-A-0364\", \"wfo\": \"TAE\"}, {\"phenomena\": \"SV\", \"significance\": \"A\", \"eventid\": 364, \"hvtec_nwsli\": null, \"area\": 31895.0, \"locations\": \"Wilcox [AL], Clarke [AL], Baldwin [AL], Crenshaw [AL], Mobile [AL], Conecuh [AL], Choctaw [AL], Butler [AL], Covington [AL], Monroe [AL], Washington [AL], Escambia [AL]\", \"issue\": \"2020-07-12T20:41:00Z\", \"product_issue\": \"2020-07-12T20:41:00Z\", \"expire\": \"2020-07-13T03:00:00Z\", \"init_expire\": \"2020-07-13T03:00:00Z\", \"uri\": \"/vtec/#2020-O-NEW-KMOB-SV-A-0364\", \"wfo\": \"MOB\"}]}{\"state\": \"AK\", \"year\": 2020, \"events\": []}{\"state\": \"AZ\", \"year\": 2020, \"events\": []}{\"state\": \"AR\", \"year\": 2020, \"events\": [{\"phenomena\": \"SV\", \"significance\": \"A\", \"eventid\": 37, \"hvtec_nwsli\": null, \"area\": 12735.0, \"locations\": \"Lee [AR], St. Francis [AR], Poinsett [AR], Mississippi [AR], Craighead [AR], Cross [AR], Crittenden [AR]\", \"issue\": \"2020-03-03T07:00:00Z\", \"product_issue\": \"2020-03-03T06:59:00Z\", \"expire\": \"2020-03-03T10:12:00Z\", \"init_expire\": \"2020-03-03T11:00:00Z\", \"uri\": \"/vtec/#2020-O-NEW-KMEG-SV-A-0037\", \"wfo\": \"MEG\"}, {\"phenomena\": \"SV\", \"significance\": \"A\", \"eventid\": 108, \"hvtec_nwsli\": null, \"area\": 4619.0, \"locations\": \"Little River [AR], Miller [AR], Sevier [AR]\", \"issue\": \"2020-04-12T19:51:00Z\", \"product_issue\": \"2020-04-12T19:51:00Z\", \"expire\": \"2020-04-13T01:00:00Z\", \"init_expire\": \"2020-04-13T01:00:00Z\", \"uri\": \"/vtec/#2020-O-NEW-KSHV-SV-A-0108\", \"wfo\": \"SHV\"}, {\"phenomena\": \"SV\", \"significance\": \"A\", \"eventid\": 111, \"hvtec_nwsli\": null, \"area\": 86754.0, \"locations\": \"Monroe [AR], Prairie [AR], Baxter [AR], Hot Spring [AR], Cleburne [AR], Pulaski [AR], Lonoke [AR], Desha [AR], Perry [AR], Boone [AR], Woodruff [AR], Pike [AR], Lincoln [AR], Jackson [AR], Independence [AR], Marion [AR], Grant [AR], Pope [AR], Drew [AR], White [AR], Calhoun [AR], Dallas [AR], Arkansas [AR], Randolph [AR], Lawrence [AR], Searcy [AR], Newton [AR], Sharp [AR], Van Buren [AR], Fulton [AR], Polk [AR], Scott [AR], Montgomery [AR], Faulkner [AR], Johnson [AR], Clark [AR], Logan [AR], Cleveland [AR], Izard [AR], Stone [AR], Ouachita [AR], Yell [AR], Conway [AR], Bradley [AR], Saline [AR], Garland [AR], Jefferson [AR]\", \"issue\": \"2020-04-12T23:00:00Z\", \"product_issue\": \"2020-04-12T22:59:00Z\", \"expire\": \"2020-04-13T02:47:00Z\", \"init_expire\": \"2020-04-13T04:00:00Z\", \"uri\": \"/vtec/#2020-O-NEW-KLZK-SV-A-0111\", \"wfo\": \"LZK\"}, {\"phenomena\": \"SV\", \"significance\": \"A\", \"eventid\": 111, \"hvtec_nwsli\": null, \"area\": 11208.0, \"locations\": \"Howard [AR], Hempstead [AR], Nevada [AR], Union [AR], Lafayette [AR], Columbia [AR]\", \"issue\": \"2020-04-12T23:00:00Z\", \"product_issue\": \"2020-04-12T22:59:00Z\", \"expire\": \"2020-04-13T02:55:00Z\", \"init_expire\": \"2020-04-13T04:00:00Z\", \"uri\": \"/vtec/#2020-O-NEW-KSHV-SV-A-0111\", \"wfo\": \"SHV\"}, {\"phenomena\": \"SV\", \"significance\": \"A\", \"eventid\": 114, \"hvtec_nwsli\": null, \"area\": 17781.0, \"locations\": \"Craighead [AR], Crittenden [AR], Clay [AR], Cross [AR], Phillips [AR], Mississippi [AR], St. Francis [AR], Lee [AR], Poinsett [AR], Greene [AR]\", \"issue\": \"2020-04-13T01:20:00Z\", \"product_issue\": \"2020-04-13T01:19:00Z\", \"expire\": \"2020-04-13T04:50:00Z\", \"init_expire\": \"2020-04-13T06:00:00Z\", \"uri\": \"/vtec/#2020-O-NEW-KMEG-SV-A-0114\", \"wfo\": \"MEG\"}, {\"phenomena\": \"SV\", \"significance\": \"A\", \"eventid\": 131, \"hvtec_nwsli\": null, \"area\": 4512.0, \"locations\": \"Little River [AR], Sevier [AR], Howard [AR]\", \"issue\": \"2020-04-22T06:47:00Z\", \"product_issue\": \"2020-04-22T06:47:00Z\", \"expire\": \"2020-04-22T11:00:00Z\", \"init_expire\": \"2020-04-22T11:00:00Z\", \"uri\": \"/vtec/#2020-O-NEW-KSHV-SV-A-0131\", \"wfo\": \"SHV\"}, {\"phenomena\": \"SV\", \"significance\": \"A\", \"eventid\": 132, \"hvtec_nwsli\": null, \"area\": 13161.0, \"locations\": \"Carroll [AR], Madison [AR], Crawford [AR], Washington [AR], Franklin [AR], Benton [AR], Sebastian [AR]\", \"issue\": \"2020-04-22T13:55:00Z\", \"product_issue\": \"2020-04-22T13:55:00Z\", \"expire\": \"2020-04-22T20:00:00Z\", \"init_expire\": \"2020-04-22T20:00:00Z\", \"uri\": \"/vtec/#2020-O-NEW-KTSA-SV-A-0132\", \"wfo\": \"TSA\"}, {\"phenomena\": \"SV\", \"significance\": \"A\", \"eventid\": 145, \"hvtec_nwsli\": null, \"area\": 13161.0, \"locations\": \"Franklin [AR], Crawford [AR], Carroll [AR], Washington [AR], Benton [AR], Sebastian [AR], Madison [AR]\", \"issue\": \"2020-04-24T20:44:00Z\", \"product_issue\": \"2020-04-24T20:44:00Z\", \"expire\": \"2020-04-25T02:22:00Z\", \"init_expire\": \"2020-04-25T04:00:00Z\", \"uri\": \"/vtec/#2020-O-NEW-KTSA-SV-A-0145\", \"wfo\": \"TSA\"}, {\"phenomena\": \"SV\", \"significance\": \"A\", \"eventid\": 147, \"hvtec_nwsli\": null, \"area\": 2735.0, \"locations\": \"Union [AR]\", \"issue\": \"2020-04-25T01:31:00Z\", \"product_issue\": \"2020-04-25T01:31:00Z\", \"expire\": \"2020-04-25T05:53:00Z\", \"init_expire\": \"2020-04-25T07:00:00Z\", \"uri\": \"/vtec/#2020-O-NEW-KSHV-SV-A-0147\", \"wfo\": \"SHV\"}, {\"phenomena\": \"SV\", \"significance\": \"A\", \"eventid\": 147, \"hvtec_nwsli\": null, \"area\": 61710.0, \"locations\": \"Perry [AR], Cleburne [AR], Desha [AR], Grant [AR], Independence [AR], Pope [AR], Ouachita [AR], Pulaski [AR], Lonoke [AR], Cleveland [AR], Marion [AR], Bradley [AR], Saline [AR], Van Buren [AR], Logan [AR], Monroe [AR], Jackson [AR], Conway [AR], Arkansas [AR], Yell [AR], Boone [AR], Jefferson [AR], Dallas [AR], Prairie [AR], Drew [AR], Lincoln [AR], Calhoun [AR], White [AR], Faulkner [AR], Newton [AR], Woodruff [AR], Searcy [AR], Johnson [AR]\", \"issue\": \"2020-04-25T01:31:00Z\", \"product_issue\": \"2020-04-25T01:31:00Z\", \"expire\": \"2020-04-25T07:00:00Z\", \"init_expire\": \"2020-04-25T07:00:00Z\", \"uri\": \"/vtec/#2020-O-NEW-KLZK-SV-A-0147\", \"wfo\": \"LZK\"}" 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