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]
  • Character class intersection
    [\w&&[^\d]]
  • 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"^(?:.*[\/\\])?(?<FileNameWithoutExtension>.*)\.(.*?(?=\#))", flags=re.MULTILINE) test_str = ("https://static1.squarespace.com/static/58d6b5ff86e6c087a92f8f89/t/5913df9915cf7db9454ad94a/1494474655305/Plato_and_Hesiod.pdf#page=270\n\n\n" "Taylor Swift - New Romantics.m4a\n" "YT/Subto2mp3/Taylor Swift - New Terribly Romantics.m4a\n" "Grow - Conan Blue (Official Video) has already been recorded in archive.m4a\n" "PowerOptim Iol/Techno/(Official Video) Blue Burrow was already been recorded in archive - Bak.wm4\n" "/Great Bun/Output Files/çè/Grow - Conan DARK (Official AUDIO) has already been recorded in archive.m4b\n" "Matter Oil_9999.zip\n" "Qpl$-pol.hrlp/perm.ui.pol/i op/doesn't matter.mp4\n" "Small Laser4.m4a\n" "manicur pliu/love is in the a°°_II+?§@R.txt\n" "^Level09\\\\Power Pol\\energy.m4a\n" "lollller_blllade 1987 (c)/super €/music_piece_.mp3\n" "\\.\\.$./../../loli( u1990) _98.lop.pl/fil l/fill2asm.aile.asm.gz.zip\n" "/Taylor Swift - New Romantics._m4a\n" "\\$/Subto2/mp3/Taylor Swift -&- New Romantics.m4a\n" "/Grow - Conan Gray (Official Video) has already been recorded in archive.m4a\n" "C:\\PowerOptim Iol/Grow - The New Gray (Official Video) has been recorded [<1999>.wm4\n" "/Great Bun/Output Files/çè/Grow - WiLlL(O)W Gray \"unofficial\" video has not been recorded in archive.m4b\n" "/Matter Oil_9999.zip\n" "file:///Qpl$-pol.hrlp/perm.ui.pol/i op/matter.mp4\n" "/£¥«^6<4>à_»Laser4 ``[12{2%}32]deg`‘.webm\n" "manicur pliu/great.power.great.responsibility?.gz.tar.zip\n" "./poi kiol/greater.power.greater.responsibility!.gz.tar.zip\n" "^Level09\\Power Pol\\energy.m4a\n" "lollller_blllade 1987 (c)/super €/music_piece_.mp3\n" "/The 'great' solitude of zorro #12/the 退ellent urge_for.mo.tar.gz\n\n\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