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"^.*?([A-Z]{2,}(?: [A-Z]{2,}){1,2})" test_str = ("성 벼 | 5 번YAO LIAO거 CHINA P R체류자격 결혼이민F-1)말급일자', # 'YAO LIAO'\n" "성 별 F 등록번호명 JAO HALJUNGCHINA P R격 결혼이민(F-6)밥급인자', # 'JAO HALJUNG'\n" "성 별 F명 CHENG HAIJING국 가 CHINA P R 역체 가차격 결혼이민(C-4) 박급인자', # 'CHENG HAIJING'\n" "KOa MDOVUD TAREEQ SAID HAFIZULLAH TURKIYE움첫;자격 거주(F-2)발급일자', # 'DOVUD TAREEQ SAID HAFIZULLAH'\n" "KOn 별 MDOVUD TAREEQ SAID- IIAFIZULLAH 감 TURKIYE동체나자격 거주F-2) 발급일자', # 'DOVUD TAREEQ SAID- IIAFIZULLAH' \n" "등록번호IN\" 성 별 M명 TAREEQ SAD IIAFIZULLAH 값 TURKIYE8체주자격 거주-2)발급일자' # 'TAREEQ SAD IIAFIZULLAH'\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