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

/
/

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"Total statistics:\s+\K\d+" test_str = "{\"logSystem\":[[2019,4,26,10,37,0,44872,\"Battery Charge Started! 17.0°C 21.05Volt\",\"#000099\",\"normal\"],[2019,4,26,10,37,0,44871,\"Total statistics: 334418m, 23862min, blade on time: 21289min\",\"#2E2EFE\",\"bold\"],[2019,4,26,10,37,0,44870,\"Current cut statistics: 2m, 0min, blade on time: 0min\",\"#2E2EFE\",\"bold\"],[2019,4,26,10,37,0,44869,\"Landroid at home\",\"#996600\",\"normal\"],[2019,4,26,10,37,0,44868,\"Landroid searching home\",\"#996600\",\"normal\"],[2019,4,26,10,36,46,44867,\"Landroid following wire\",\"#996600\",\"normal\"],[2019,4,26,10,36,43,44866,\"Landroid searching wire\",\"#996600\",\"normal\"],[2019,4,26,10,36,41,44865,\"[auto] message reset Close windows to go charge\",\"#FFA800\",\"normal\"],[2019,4,26,10,36,40,44864,\"Landroid start sequence\",\"#996600\",\"normal\"],[2019,4,26,10,36,40,44863,\"Home button pressed\",\"#FFA800\",\"normal\"],[2019,4,26,10,36,38,44862,\"[user] message reset Upside Down\",\"#FFA800\",\"normal\"],[2019,4,26,10,34,47,44861,\"Landroid Upside Down 41x-2y-0.6z\",\"#FF0000\",\"bold\"],[2019,4,26,10,34,42,44860,\"[user] message reset Trapped\",\"#FFA800\",\"normal\"],[2019,4,26,10,34,35,44859,\"[auto] message reset Outside working area\",\"#FFA800\",\"normal\"],[2019,4,26,10,29,20,44858,\"Landroid in idle state 16.4°C 20.33 Volt\",\"#996600\",\"normal\"],[2019,4,26,10,29,20,44857,\"Total statistics: 334416m, 23862min, blade on time: 21289min\",\"#2E2EFE\",\"bold\"],[2019,4,26,10,29,20,44856,\"Current cut statistics: 71m, 8min, blade on time: 0min\",\"#2E2EFE\",\"bold\"],[2019,4,26,10,29,20,44855,\"!ERROR! outside wire timeout\",\"#FF0000\",\"bold\"],[2019,4,26,10,28,54,44854,\"[Wifi] Connected\",\"#2E2EFE\",\"normal\"],[2019,4,26,10,28,36,44853,\"[Wifi] Connection Lost!\",\"#2E2EFE\",\"normal\"],[2019,4,26,10,25,6,44852,\"Landroid following wire\",\"#996600\",\"normal\"],[2019,4,26,10,25,4,44851,\"Landroid searching home\",\"#996600\",\"normal\"],[2019,4,26,10,24,54,44850,\"Landroid following wire\",\"#996600\",\"normal\"],[2019,4,26,10,24,54,44849,\"Landroid searching home\",\"#996600\",\"normal\"],[2019,4,26,10,24,28,44848,\"Landroid following wire\",\"#996600\",\"normal\"],[2019,4,26,10,24,25,44847,\"Landroid searching wire\",\"#996600\",\"normal\"],[2019,4,26,10,23,42,44846,\"Landroid following wire\",\"#996600\",\"normal\"],[2019,4,26,10,23,39,44845,\"Landroid searching wire\",\"#996600\",\"normal\"],[2019,4,26,10,22,58,44844,\"Landroid following wire\",\"#996600\",\"normal\"],[2019,4,26,10,22,54,44843,\"Landroid searching wire\",\"#996600\",\"normal\"],[2019,4,26,10,22,54,44842,\"Flowerbed loop detected leaving...\",\"#FFA800\",\"normal\"],[2019,4,26,10,21,36,44841,\"Landroid following wire\",\"#996600\",\"normal\"],[2019,4,26,10,21,22,44840,\"Landroid searching wire\",\"#996600\",\"normal\"],[2019,4,26,10,21,22,44839,\"[Battery LOW] homing req, status: 14.8°C 23.65Volt\",\"#FFA800\",\"normal\"],[2019,4,26,10,21,13,44838,\"Landroid grass cutting\",\"#996600\",\"normal\"],[2019,4,26,10,21,10,44837,\"[auto] message reset Close windows to start\",\"#FFA800\",\"normal\"],[2019,4,26,10,21,9,44836,\"Landroid start sequence\",\"#996600\",\"normal\"],[2019,4,26,10,21,9,44835,\"Start button pressed\",\"#FFA800\",\"normal\"],[2019,4,26,10,21,7,44834,\"[user] message reset Trapped\",\"#FFA800\",\"normal\"],[2019,4,26,10,21,3,44833,\"[Wifi] Connected\",\"#2E2EFE\",\"normal\"],[2019,4,26,10,20,51,44832,\"Landroid in idle state 14.7°C 24.20 Volt\",\"#996600\",\"normal\"],[2019,4,26,10,20,51,44831,\"Power On v: 2.45\",\"#000000\",\"bold\"],[2019,4,25,19,36,18,44830,\"Shutdown 24.07Volt\",\"#000000\",\"bold\"],[2019,4,25,19,36,18,44829,\"Landroid idle shutdown timer\",\"#FFA800\",\"normal\"],[2019,4,25,19,16,18,44828,\"Landroid in idle state 37.6°C 24.05 Volt\",\"#996600\",\"normal\"],[2019,4,25,19,16,18,44827,\"Total statistics: 334345m, 23854min, blade on time: 21289min\",\"#2E2EFE\",\"bold\"],[2019,4,25,19,16,18,44826,\"Current cut statistics: 1087m, 76min, blade on time: 76min\",\"#2E2EFE\",\"bold\"],[2019,4,25,19,16,17,44825,\"Landroid following wire\",\"#996600\",\"normal\"],[2019,4,25,19,16,15,44824,\"Landroid searching home\",\"#996600\",\"normal\"],[2019,4,25,19,16,9,44823,\"Landroid following wire\",\"#996600\",\"normal\"],[2019,4,25,19,16,9,44822,\"Landroid searching home\",\"#996600\",\"normal\"],[2019,4,25,19,16,5,44821,\"Landroid following wire\",\"#996600\",\"normal\"],[2019,4,25,19,15,58,44820,\"Landroid lift recovery procedure\",\"#996600\",\"normal\"],[2019,4,25,19,15,57,44819,\"Landroid following wire\",\"#996600\",\"normal\"],[2019,4,25,19,15,55,44818,\"Landroid searching home\",\"#996600\",\"normal\"],[2019,4,25,19,15,50,44817,\"Landroid following wire\",\"#996600\",\"normal\"],[2019,4,25,19,15,50,44816,\"Landroid searching wire\",\"#996600\",\"normal\"],[2019,4,25,19,15,50,44815,\"[Battery LOW] homing req, status: 37.6°C 23.97Volt\",\"#FFA800\",\"normal\"],[2019,4,25,19,15,28,44814,\"Landroid grass cutting\",\"#996600\",\"normal\"],[2019,4,25,19,15,24,44813,\"Landroid trapped recovery procedure\",\"#996600\",\"normal\"],[2019,4,25,19,12,26,44812,\"Landroid grass cutting\",\"#996600\",\"normal\"],[2019,4,25,19,12,19,44811,\"Landroid trapped recovery procedure\",\"#996600\",\"normal\"],[2019,4,25,19,10,49,44810,\"Landroid grass cutting\",\"#996600\",\"normal\"],[2019,4,25,19,10,44,44809,\"Landroid trapped recovery procedure\",\"#996600\",\"normal\"],[2019,4,25,19,9,22,44808,\"Landroid grass cutting\",\"#996600\",\"normal\"],[2019,4,25,19,9,18,44807,\"Landroid trapped recovery procedure\",\"#996600\",\"normal\"],[2019,4,25,19,8,32,44806,\"Landroid grass cutting\",\"#996600\",\"normal\"],[2019,4,25,19,8,27,44805,\"Landroid trapped recovery procedure\",\"#996600\",\"normal\"],[2019,4,25,19,8,26,44804,\"Landroid grass cutting\",\"#996600\",\"normal\"],[2019,4,25,19,8,22,44803,\"Landroid trapped recovery procedure\",\"#996600\",\"normal\"],[2019,4,25,19,7,55,44802,\"Landroid grass cutting\",\"#996600\",\"normal\"],[2019,4,25,19,7,51,44801,\"Landroid trapped recovery procedure\",\"#996600\",\"normal\"],[2019,4,25,19,6,0,44800,\"Landroid grass cutting\",\"#996600\",\"normal\"],[2019,4,25,19,5,55,44799,\"Landroid trapped recovery procedure\",\"#996600\",\"normal\"],[2019,4,25,19,5,6,44798,\"Landroid grass cutting\",\"#996600\",\"normal\"],[2019,4,25,19,5,2,44797,\"Landroid trapped recovery procedure\",\"#996600\",\"normal\"],[2019,4,25,19,4,10,44796,\"Landroid grass cutting\",\"#996600\",\"normal\"],[2019,4,25,19,4,5,44795,\"Landroid trapped recovery procedure\",\"#996600\",\"normal\"],[2019,4,25,19,3,29,44794,\"Landroid grass cutting\",\"#996600\",\"normal\"],[2019,4,25,19,3,25,44793,\"Landroid trapped recovery procedure\",\"#996600\",\"normal\"],[2019,4,25,19,3,25,44792,\"Landroid grass cutting\",\"#996600\",\"normal\"],[2019,4,25,19,3,21,44791,\"Landroid trapped recovery procedure\",\"#996600\",\"normal\"],[2019,4,25,19,2,58,44790,\"Landroid grass cutting\",\"#996600\",\"normal\"],[2019,4,25,19,2,54,44789,\"Landroid trapped recovery procedure\",\"#996600\",\"normal\"],[2019,4,25,19,2,52,44788,\"Landroid grass cutting\",\"#996600\",\"normal\"],[2019,4,25,19,2,47,44787,\"Landroid trapped recovery procedure\",\"#996600\",\"normal\"],[2019,4,25,19,2,43,44786,\"Landroid grass cutting\",\"#996600\",\"normal\"],[2019,4,25,19,2,39,44785,\"Landroid trapped recovery procedure\",\"#996600\",\"normal\"],[2019,4,25,19,2,23,44784,\"Landroid grass cutting\",\"#996600\",\"normal\"],[2019,4,25,19,2,18,44783,\"Landroid trapped recovery procedure\",\"#996600\",\"normal\"],[2019,4,25,19,2,6,44782,\"Landroid grass cutting\",\"#996600\",\"normal\"],[2019,4,25,19,2,2,44781,\"Landroid trapped recovery procedure\",\"#996600\",\"normal\"],[2019,4,25,19,1,0,44780,\"Landroid grass cutting\",\"#996600\",\"normal\"],[2019,4,25,19,0,54,44779,\"Landroid trapped recovery procedure\",\"#996600\",\"normal\"],[2019,4,25,19,0,54,44778,\"Landroid grass cutting\",\"#996600\",\"normal\"],[2019,4,25,19,0,48,44777,\"Landroid trapped recovery procedure\",\"#996600\",\"normal\"],[2019,4,25,19,0,46,44776,\"Landroid grass cutting\",\"#996600\",\"normal\"],[2019,4,25,19,0,42,44775,\"Landroid trapped recovery procedure\",\"#996600\",\"normal\"],[2019,4,25,18,59,21,44774,\"Landroid grass cutting\",\"#996600\",\"normal\"],[2019,4,25,18,59,17,44773,\"Landroid trapped recovery procedure\",\"#996600\",\"normal\"]]}" 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