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

r"
"
gm

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"^DATE:.*((?:\n(?!AREA:).*)+)" test_str = ("AREA: OMBEYI MARKET, ST. RITA RAMULA\n\n" "DATE: Thursday 25.03.2021, TIME: 9.00 A.M. = 5.00 P.M.\n\n" "Ombeyi Mk, Kiliti Mkt, Masogo Mkt, Miwani, Kasongo, Onyango Midika, St. Rita Ramula, Onyalo\n" "Biro, Yawo Pri, Obino, Rutek, Keyo Pri & adjacent customers.\n\n" "AREA: NYAMACHE FACTORY\n\n" "DATE: Thursday 25.03.2021, TIME: 830 A.M. - 3.00 P.M.\n\n" "Nyamache Fact, Suguta, Gionseri, Igare, Kionduso, Nyationgongo, Enchoro, Kebuko, Emenwa, Maji\n" "Mazuri, Borangi & adjacent customers.\n\n" "AREA: SUNEKA MARKET, RIANA MARKET\n\n" "DATE: Thursday 25.03.2021, TIME: 8.00 A.M. - 3.00 P.M.\n\n" "Suneka Mk, Riana Mk, Kiabusura, Gesonso, Chisaro, Sugunana, Nyamira Ndogo & adjacent\n" "customers.\n\n" "AREA: ITIATI, GITUNDUTI\n\n" "DATE: Thursday 25.03.2021, TIME: 9.00 A.M. = 2.00 P.M.\n\n" "General China, Gachuiro, Gathuini Pri, Itiati Campus, Kianjugum, Gikore, Kihuri TBC, Gitunduti &\n" "adjacent customers.") 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