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"^t=(.* .*) p=(\d+) h=(.*) db=(\w+) u=(\w+) x=(\d+) (\w+:) (.*)" test_str = ("t=2020-08-25 15:00:00.000 +03 p=16205 h=127.0.0.1 db=test u=test_app x=0 LOG: duration: 0.011 ms execute S_40: SELECT ID, EKLEME_ZAMANI, EKLEYEN_KULLANICI_ID, GORULME_DURUMU, GUNCELLEME_ZAMANI, GUNCELLEYEN_KULLANICI_ID, IP_ADRESI, ISLEM_ZAMANI, ISLEMI_YAPAN_KULLANICI_ID, METOD, PARAMETRE_JSON, UYGULAMA_ID, VERSIYON, DURUM_ID FROM DB_LOG WHERE (ID = $1)\n" "t=2020-08-25 15:00:00.000 +03 p=16205 h=127.0.0.1 db=test u=test_app x=0 DETAIL: parameters: $1 = '9187372'\n" "t=2020-08-25 15:00:00.001 +03 p=36001 h=127.0.0.1 db=test u=test_app x=0 LOG: duration: 0.005 ms bind S_1: COMMIT\n" "t=2020-08-25 15:00:00.001 +03 p=36001 h=127.0.0.1 db=test u=test_app x=0 LOG: duration: 0.004 ms execute S_1: COMMIT\n" "t=2020-08-25 15:00:00.001 +03 p=16205 h=127.0.0.1 db=test u=test_app x=0 LOG: duration: 0.018 ms bind S_41: INSERT INTO DB_LOG (ID, EKLEME_ZAMANI, EKLEYEN_KULLANICI_ID, GORULME_DURUMU, GUNCELLEME_ZAMANI, GUNCELLEYEN_KULLANICI_ID, IP_ADRESI, ISLEM_ZAMANI, ISLEMI_YAPAN_KULLANICI_ID, METOD, PARAMETRE_JSON, UYGULAMA_ID, VERSIYON, DURUM_ID) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14)\n" "t=2019-12-19 17:00:00.102 +03 p=58042 h= db= u= x=0 LOG: automatic vacuum of table \"postgres.pgagent.pga_job\": index scans: 0\n" " pages: 0 removed, 9 remain, 0 skipped due to pins, 0 skipped frozen\n" " tuples: 0 removed, 493 remain, 472 are dead but not yet removable, oldest xmin: 20569983\n" " buffer usage: 90 hits, 0 misses, 0 dirtied\n" " avg read rate: 0.000 MB/s, avg write rate: 0.000 MB/s\n" " system usage: CPU: user: 0.00 s, system: 0.00 s, elapsed: 0.00 s") subst = "\"\\1\",\"\\2\",\"\\3\",\"\\4\",\"\\5\",\"\\6\",\"\\7\",\"\\8\"" # 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