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

/
/
gs

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"(^|(?<=\n))([0-2]\d{1}:[0-5]\d{1}:[0-5]\d{1}\.\d{3}) --> ([0-2]\d{1}:[0-5]\d{1}:[0-5]\d{1}\.\d{3})(.*?)((?=[0-2]\d{1}:[0-5]\d{1}:[0-5]\d{1}\.\d{3})|$)" test_str = ("00:00:34.355 --> 00:00:36.635\n" "Бублики! Купите горячии бублики!\n\n" "00:00:37.315 --> 00:00:40.315\n" "Ты что сделал, подлец?! Все ботинки мне изгадил!\n\n" "00:00:40.995 --> 00:00:42.155\n" "Пошел вон!\n\n" "00:00:42.275 --> 00:00:46.875\n" "Ваше благородие, да бросьте вы этого дурака!\n" " Идите до сюда, зараз все исправим.Давайте.\n\n" "00:00:48.275 --> 00:00:49.715\n" "На, чисть быстро.\n\n" "00:00:49.915 --> 00:00:57.715\n" "Один момент. Такие сапоги перемазали, мама родная!\n" " У меня вакса-то германская, фирма \"Лавалин\".\n\n" "00:00:57.915 --> 00:01:00.755\n" "Не вакса, а масло просто, хоть на хлеб мажь.\n\n" "00:01:01.795 --> 00:01:02.875\n" "Чисть, чисть.\n\n" "00:01:04.195 --> 00:01:05.315\n" "Ой. Ваше благородие\n\n" "00:01:05.875 --> 00:01:06.955\n" "Что с тобой?\n\n" "00:01:07.475 --> 00:01:08.875\n" "Живот прихватило… Не могу..\n\n" "00:01:09.035 --> 00:01:10.355\n" "Ты куда? Иди сюда\n\n" "00:01:10.635 --> 00:01:12.035\n" " По нужде, ваше благородие!\n\n" "00:01:14.915 --> 00:01:18.355\n" "А помнишь погром на Дальницкой? Дракон чертов\n\n" "00:01:30.595 --> 00:01:33.035\n" "Или это я не знаю какая бывает жизнь?\n\n" "00:01:36.915 --> 00:01:39.955\n" " Нас родила мама. Так же как и вас\n\n" "00:01:41.435 --> 00:01:46.195\n" "Эта женщина - наша мама - хотела чтоб мы жили,\n\n" "00:01:46.235 --> 00:01:48.035\n" " а не мучались\n\n" "00:01:48.395 --> 00:01:50.955\n" "Она хотела чтоб мы жили хорошо\n\n" "00:01:51.835 --> 00:01:55.515\n" "и она была права,\n" "как может быть права только наша мама...\n\n" "00:01:57.275 --> 00:02:00.555\n" "А Вы говорите, я не знаю, какая бывает жизнь...\n\n" "00:02:16.755 --> 00:02:18.395\n" "Стой! Стоп!\n") matches = re.finditer(regex, test_str, re.DOTALL) 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