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

/
/
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"([a-zA-Z]{3}\d{3})\s([a-zA-Z]{9}\s+\((\d{4})\)\s+\*[a-zA-Z]{3})\s+([a-zA-Z]+\d\w)\s+\.([a-zA-Z]+)\s(\d+)\s+" test_str = (" LMZ333 ALLOTMENT (0000) *TSC \n" "HDQRM5I \n" ".MADRIIB 160846 \n" "MADIB N4MPK/HELIB0150/1949417/HEL/IB/A/FI//RC//\n" "HDQ5I N4MPK\n" "1CUVILEON/CARLOS EDUARDO\n" "1CONTRERASARNAEZ/MARIA BEGONA 1ROBLEDOCONTRERAS/PATRICIA \n" "5I8397J/IB2198J25JUN RZGMAD CS1/0850 1220\n" "5I8327J/IB2194J06JUL MADRZG CS1/1745 2115\n" "OSI 5I CTCP 34606686051-M\n" "OSI 5I POSI-DSAC//MADIB08AB/I/1\n" "OSI 5I CARLOSCUVILIN//GMAIL.COM\n" "= ") 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