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
Processing...

Test String

Code Generator

Language

Generated Code

import re regex = re.compile(r"\[\[ *([0-9]{3}0)[^]]*\| *([0-9]{3}[^0]) *\]\]|\[\[ *([0-9]{3}1)[^]]*\| *([0-9]{3}[^5]) *\]\]|\[\[ *([0-9]{3}2)[^]]*\| *([0-9]{3}[^2]) *\]\]|\[\[ *([0-9]{3}3)[^]]*\| *([0-9]{3}[^3]) *\]\]|\[\[ *([0-9]{3}4)[^]]*\| *([0-9]{3}[^4]) *\]\]|\[\[ *([0-9]{3}5)[^]]*\| *([0-9]{3}[^5]) *\]\]|\[\[ *([0-9]{3}6)[^]]*\| *([0-9]{3}[^6]) *\]\]|\[\[ *([0-9]{3}7)[^]]*\| *([0-9]{3}[^7]) *\]\]|\[\[ *([0-9]{3}8)[^]]*\| *([0-9]{3}[^8]) *\]\]|\[\[ *([0-9]{3}9)[^]]*\| *([0-9]{3}[^9]) *\]\]|\[\[ *([0-9]{2}0[0-9])[^]]*\| *([0-9]{2}[^0][0-9]) *\]\]|\[\[ *([0-9]{2}1[0-9])[^]]*\| *([0-9]{2}[^1][0-9]) *\]\]|\[\[ *([0-9]{2}2[0-9])[^]]*\| *([0-9]{2}[^2][0-9]) *\]\]|\[\[ *([0-9]{2}3[0-9])[^]]*\| *([0-9]{2}[^3][0-9]) *\]\]|\[\[ *([0-9]{2}4[0-9])[^]]*\| *([0-9]{2}[^4][0-9]) *\]\]|\[\[ *([0-9]{2}5[0-9])[^]]*\| *([0-9]{2}[^5][0-9]) *\]\]|\[\[ *([0-9]{2}6[0-9])[^]]*\| *([0-9]{2}[^6][0-9]) *\]\]|\[\[ *([0-9]{2}7[0-9])[^]]*\| *([0-9]{2}[^7][0-9]) *\]\]|\[\[ *([0-9]{2}8[0-9])[^]]*\| *([0-9]{2}[^8][0-9]) *\]\]|\[\[ *([0-9]{2}9[0-9])[^]]*\| *([0-9]{2}[^9][0-9]) *\]\]", flags=re.IGNORECASE) test_str = ("[[1900]] [[1900 en truc|1901]]\n" "[[1901|1900]]\n" "[[1900 en truc|1900]]\n" "[[1900 en truc|1901]]\n" "[[1904 en truc|1901]]\n" "[[1900|1901]]\n" "[[1900 en truc|1901]] [[1900 en truc|1900]] [[1900 en truc|1910]]\n\n" "[[1940 en truc|1910]]\n" "[[1940|1910]]\n\n\n" "\\[\\[ *([0-9]{3}0)[^]]*\\| *([0-9]{3}[^0]) *\\]\\]\n" "\\[\\[ *([0-9]{3}1)[^]]*\\| *([0-9]{3}[^5]) *\\]\\]\n" "\\[\\[ *([0-9]{3}2)[^]]*\\| *([0-9]{3}[^2]) *\\]\\]\n" "\\[\\[ *([0-9]{3}3)[^]]*\\| *([0-9]{3}[^3]) *\\]\\]\n" "\\[\\[ *([0-9]{3}4)[^]]*\\| *([0-9]{3}[^4]) *\\]\\]\n" "\\[\\[ *([0-9]{3}5)[^]]*\\| *([0-9]{3}[^5]) *\\]\\]\n" "\\[\\[ *([0-9]{3}6)[^]]*\\| *([0-9]{3}[^6]) *\\]\\]\n" "\\[\\[ *([0-9]{3}7)[^]]*\\| *([0-9]{3}[^7]) *\\]\\]\n" "\\[\\[ *([0-9]{3}8)[^]]*\\| *([0-9]{3}[^8]) *\\]\\]\n" "\\[\\[ *([0-9]{3}9)[^]]*\\| *([0-9]{3}[^9]) *\\]\\]\n" "\\[\\[ *([0-9]{2}0[0-9])[^]]*\\| *([0-9]{2}[^0][0-9]) *\\]\\]\n" "\\[\\[ *([0-9]{2}1[0-9])[^]]*\\| *([0-9]{2}[^1][0-9]) *\\]\\]\n" "\\[\\[ *([0-9]{2}2[0-9])[^]]*\\| *([0-9]{2}[^2][0-9]) *\\]\\]\n" "\\[\\[ *([0-9]{2}3[0-9])[^]]*\\| *([0-9]{2}[^3][0-9]) *\\]\\]\n" "\\[\\[ *([0-9]{2}4[0-9])[^]]*\\| *([0-9]{2}[^4][0-9]) *\\]\\]\n" "\\[\\[ *([0-9]{2}5[0-9])[^]]*\\| *([0-9]{2}[^5][0-9]) *\\]\\]\n" "\\[\\[ *([0-9]{2}6[0-9])[^]]*\\| *([0-9]{2}[^6][0-9]) *\\]\\]\n" "\\[\\[ *([0-9]{2}7[0-9])[^]]*\\| *([0-9]{2}[^7][0-9]) *\\]\\]\n" "\\[\\[ *([0-9]{2}8[0-9])[^]]*\\| *([0-9]{2}[^8][0-9]) *\\]\\]\n" "\\[\\[ *([0-9]{2}9[0-9])[^]]*\\| *([0-9]{2}[^9][0-9]) *\\]\\]\n\n\n") matches = regex.finditer(test_str) for match_num, match in enumerate(matches, start=1): print(f"Match {match_num} was found at {match.start()}-{match.end()}: {match.group()}") for group_num, group in enumerate(match.groups(), start=1): print(f"Group {group_num} found at {match.start(group_num)}-{match.end(group_num)}: {group}")

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