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

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"<p>(\w|\"|').+<\/p>" test_str = ("<p>坐在马车上的叶天，通过窗户看向远处雄伟的天炎城，一时间不由苦笑。</p>\n" "<p>ye Tian, ​​sitting in the carriage</p>\n" "<p>至于原因，小糯米跟纪小小根本受不了天炎城那一百多度的高温，此时已经热的快要中暑了。</p>\n" "<p>As for the reason, Xiaomi and Ji Xiaoxiao couldn't stand has a heatstroke.</p>\n" "<p>小金吼倒是没事，趴在叶天脚下睡的深沉。</p>\n" "<p>Xiao Jin’s squatting is fine, and he is sleeping deep at the foot of Ye Tian.</p>\n" "<p>“少爷，我受不了啦！”小糯米眼见马车每前行一步，温度就会上升几度，连向叶天求救。</p>\n" "<p>\"\"Young master, I can't stand it!\"\" .</p>") subst = "" # You can manually specify the number of replacements by changing the 4th argument result = re.sub(regex, subst, test_str, 0, re.MULTILINE) 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