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

~
~
g

Test String

Substitution

Processing...

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"\s*(\.{2,}|[:,.](?!(?<=ό,)τι)(?!(?<=\d.)\d))(?!\s*<br\s*/>)\s*" test_str = ("this ... ---\n" "-----------------..............\n" "Composition:80% Polyamide, 15% Elastane, 5% Wool.\n" "Side length 50.5 cm <---- THIS SHOULDN'T BE MATCHED\n" "Value 4,500 <---- THIS SHOULDN'T BE MATCHED EITHER\n\n" "ό,τι <---- THIS IS A FIXED PHRASE IN GREEK AND THEREFORE SHOULDN'T BE MATCHED\n" "Comfort and timeless design characterize the Puma Smash V2 made of suede leather. They can be worn all the time ,being a unique choice for those who want to stand out .Made of rubber.<br />- Softfoam floor<br />- Binding with laces\n\n" "Specs:<br />&bull; Something<br /><br />&bull; Something else<br />&bull; One more\n\n" "Children's Form Champion<br /><br />Children's set that will give a comfortable feeling for endless hours of play.<br />It consists of a cardigan and trousers ,made of soft fabric and have rib cuffs and legs for a better fit.<br /><br />&bull; Normal fit<br /><br />&bull; Cardigan :Rib cuffs, zippers throughout length, high neck, Champion logo <br /> <br />&bull; Pants: Elastic waist with drawstring, ribbed legs, Champion logo") subst = "$1 " # You can manually specify the number of replacements by changing the 4th argument result = re.sub(regex, subst, test_str, 0) if result: print (result) # 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