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

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"(?smx)\n" r"(?(DEFINE)\n" r" (?<jsonObject>\n" r" \{(?&jsonField)(?>,(?&jsonField))*+\}|\n" r" \{[[:space:]]*+\}\n" r" )\n" r" (?<jsonArray>\n" r" \[(?&jsonValue)(?>,(?&jsonValue))*+\]|\n" r" \[[[:space:]]*+\]\n" r" )\n" r" (?<string>\n" r" \"\n" r" [^\"\\]*+\n" r" (?>\n" r" (?>\n" r" \\[\"\\\/rntfb]|\n" r" \\u[[:xdigit:]]{4}\n" r" )++\n" r" [^\"\\]*+\n" r" )*+\n" r" \"\n" r" )\n" r" (?<number>\n" r" \-?+\n" r" (?>\n" r" [1-9][[:digit:]]*+|\n" r" 0\n" r" )\n" r" (?>\.[[:digit:]]++)?+\n" r" (?>[eE][\+\-]?+[[:digit:]]++)?+\n" r" )\n" r" (?<jsonValue>\n" r" [[:space:]]*+\n" r" (?>\n" r" (?&string)|\n" r" (?&number)|\n" r" (?&jsonObject)|\n" r" (?&jsonArray)|\n" r" false|\n" r" true|\n" r" null\n" r" )\n" r" [[:space:]]*+\n" r" )\n" r" (?<jsonField>\n" r" [[:space:]]*+(?&string)[[:space:]]*+\:\n" r" (?&jsonValue)\n" r" )\n" r")\n" r"^(?&jsonValue),\n") test_str = ("null,\n" " null,\n" "null ,\n" " null ,\n" "false,\n" " false,\n" "false ,\n" " false ,\n" "true,\n" " true,\n" "true ,\n" " true ,\n" "123,\n" "0,\n" "-123,\n" "-0,\n" "123.0,\n" "0.0,\n" "-123.0,\n" "-0.0,\n" "123e1,\n" "0e1,\n" "-123e1,\n" "-0e1,\n" "123.0e1,\n" "0.0e1,\n" "-123.0e1,\n" "-0.0e1,\n" "123e+1,\n" "0e+1,\n" "-123e+1,\n" "-0e+1,\n" "123.0e+1,\n" "0.0e+1,\n" "-123.0e+1,\n" "-0.0e+1,\n" "123e-1,\n" "0e-1,\n" "-123e-1,\n" "-0e-1,\n" "123.0e-1,\n" "0.0e-1,\n" "-123.0e-1,\n" "-0.0e-1,\n" "123E1,\n" "0E1,\n" "-123E1,\n" "-0E1,\n" "123.0E1,\n" "0.0E1,\n" "-123.0E1,\n" "-0.0E1,\n" "123E+1,\n" "0E+1,\n" "-123E+1,\n" "-0E+1,\n" "123.0E+1,\n" "0.0E+1,\n" "-123.0E+1,\n" "-0.0E+1,\n" "123E-1,\n" "0E-1,\n" "-123E-1,\n" "-0E-1,\n" "123.0E-1,\n" "0.0E-1,\n" "-123.0E-1,\n" "-0.0E-1,\n" " 123,\n" " 0,\n" " -123,\n" " -0,\n" " 123.0,\n" " 0.0,\n" " -123.0,\n" " -0.0,\n" " 123e1,\n" " 0e1,\n" " -123e1,\n" " -0e1,\n" " 123.0e1,\n" " 0.0e1,\n" " -123.0e1,\n" " -0.0e1,\n" " 123e+1,\n" " 0e+1,\n" " -123e+1,\n" " -0e+1,\n" " 123.0e+1,\n" " 0.0e+1,\n" " -123.0e+1,\n" " -0.0e+1,\n" " 123e-1,\n" " 0e-1,\n" " -123e-1,\n" " -0e-1,\n" " 123.0e-1,\n" " 0.0e-1,\n" " -123.0e-1,\n" " -0.0e-1,\n" " 123E1,\n" " 0E1,\n" " -123E1,\n" " -0E1,\n" " 123.0E1,\n" " 0.0E1,\n" " -123.0E1,\n" " -0.0E1,\n" " 123E+1,\n" " 0E+1,\n" " -123E+1,\n" " -0E+1,\n" " 123.0E+1,\n" " 0.0E+1,\n" " -123.0E+1,\n" " -0.0E+1,\n" " 123E-1,\n" " 0E-1,\n" " -123E-1,\n" " -0E-1,\n" " 123.0E-1,\n" " 0.0E-1,\n" " -123.0E-1,\n" " -0.0E-1,\n" "123 ,\n" "0 ,\n" "-123 ,\n" "-0 ,\n" "123.0 ,\n" "0.0 ,\n" "-123.0 ,\n" "-0.0 ,\n" "123e1 ,\n" "0e1 ,\n" "-123e1 ,\n" "-0e1 ,\n" "123.0e1 ,\n" "0.0e1 ,\n" "-123.0e1 ,\n" "-0.0e1 ,\n" "123e+1 ,\n" "0e+1 ,\n" "-123e+1 ,\n" "-0e+1 ,\n" "123.0e+1 ,\n" "0.0e+1 ,\n" "-123.0e+1 ,\n" "-0.0e+1 ,\n" "123e-1 ,\n" "0e-1 ,\n" "-123e-1 ,\n" "-0e-1 ,\n" "123.0e-1 ,\n" "0.0e-1 ,\n" "-123.0e-1 ,\n" "-0.0e-1 ,\n" "123E1 ,\n" "0E1 ,\n" "-123E1 ,\n" "-0E1 ,\n" "123.0E1 ,\n" "0.0E1 ,\n" "-123.0E1 ,\n" "-0.0E1 ,\n" "123E+1 ,\n" "0E+1 ,\n" "-123E+1 ,\n" "-0E+1 ,\n" "123.0E+1 ,\n" "0.0E+1 ,\n" "-123.0E+1 ,\n" "-0.0E+1 ,\n" "123E-1 ,\n" "0E-1 ,\n" "-123E-1 ,\n" "-0E-1 ,\n" "123.0E-1 ,\n" "0.0E-1 ,\n" "-123.0E-1 ,\n" "-0.0E-1 ,\n" " 123 ,\n" " 0 ,\n" " -123 ,\n" " -0 ,\n" " 123.0 ,\n" " 0.0 ,\n" " -123.0 ,\n" " -0.0 ,\n" " 123e1 ,\n" " 0e1 ,\n" " -123e1 ,\n" " -0e1 ,\n" " 123.0e1 ,\n" " 0.0e1 ,\n" " -123.0e1 ,\n" " -0.0e1 ,\n" " 123e+1 ,\n" " 0e+1 ,\n" " -123e+1 ,\n" " -0e+1 ,\n" " 123.0e+1 ,\n" " 0.0e+1 ,\n" " -123.0e+1 ,\n" " -0.0e+1 ,\n" " 123e-1 ,\n" " 0e-1 ,\n" " -123e-1 ,\n" " -0e-1 ,\n" " 123.0e-1 ,\n" " 0.0e-1 ,\n" " -123.0e-1 ,\n" " -0.0e-1 ,\n" " 123E1 ,\n" " 0E1 ,\n" " -123E1 ,\n" " -0E1 ,\n" " 123.0E1 ,\n" " 0.0E1 ,\n" " -123.0E1 ,\n" " -0.0E1 ,\n" " 123E+1 ,\n" " 0E+1 ,\n" " -123E+1 ,\n" " -0E+1 ,\n" " 123.0E+1 ,\n" " 0.0E+1 ,\n" " -123.0E+1 ,\n" " -0.0E+1 ,\n" " 123E-1 ,\n" " 0E-1 ,\n" " -123E-1 ,\n" " -0E-1 ,\n" " 123.0E-1 ,\n" " 0.0E-1 ,\n" " -123.0E-1 ,\n" " -0.0E-1 ,\n" "\"\",\n" "\"zyxwvuts\",\n" "\"\\\\\\/\\r\\n\\t\\f\\b\",\n" "\"\\u1234\\uabcd\\uABCD\",\n" "\"zyxwvutszyxwvuts\",\n" "\"zyxwvuts\\\\\\/\\r\\n\\t\\f\\b\",\n" "\"zyxwvuts\\u1234\\uabcd\\uABCD\",\n" "\"\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\",\n" "\"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\",\n" "\"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\",\n" "\"\\u1234\\uabcd\\uABCDzyxwvuts\",\n" "\"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\",\n" "\"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\",\n" "\"zyxwvutszyxwvutszyxwvuts\",\n" "\"zyxwvuts\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\",\n" "\"zyxwvuts\\u1234\\uabcd\\uABCDzyxwvuts\",\n" "\"\\\\\\/\\r\\n\\t\\f\\bzyxwvutszyxwvuts\",\n" "\"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\",\n" "\"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCDzyxwvuts\",\n" "\"\\u1234\\uabcd\\uABCDzyxwvutszyxwvuts\",\n" "\"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\",\n" "\"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCDzyxwvuts\",\n" "\"zyxwvutszyxwvuts\\\\\\/\\r\\n\\t\\f\\b\",\n" "\"zyxwvuts\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\",\n" "\"zyxwvuts\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\",\n" "\"\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\\\\\\/\\r\\n\\t\\f\\b\",\n" "\"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\",\n" "\"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\",\n" "\"\\u1234\\uabcd\\uABCDzyxwvuts\\\\\\/\\r\\n\\t\\f\\b\",\n" "\"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\",\n" "\"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\",\n" "\"zyxwvutszyxwvuts\\u1234\\uabcd\\uABCD\",\n" "\"zyxwvuts\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\",\n" "\"zyxwvuts\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\",\n" "\"\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\\u1234\\uabcd\\uABCD\",\n" "\"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\",\n" "\"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\",\n" "\"\\u1234\\uabcd\\uABCDzyxwvuts\\u1234\\uabcd\\uABCD\",\n" "\"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\",\n" "\"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\",\n" " \"\",\n" " \"zyxwvuts\",\n" " \"\\\\\\/\\r\\n\\t\\f\\b\",\n" " \"\\u1234\\uabcd\\uABCD\",\n" " \"zyxwvutszyxwvuts\",\n" " \"zyxwvuts\\\\\\/\\r\\n\\t\\f\\b\",\n" " \"zyxwvuts\\u1234\\uabcd\\uABCD\",\n" " \"\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\",\n" " \"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\",\n" " \"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\",\n" " \"\\u1234\\uabcd\\uABCDzyxwvuts\",\n" " \"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\",\n" " \"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\",\n" " \"zyxwvutszyxwvutszyxwvuts\",\n" " \"zyxwvuts\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\",\n" " \"zyxwvuts\\u1234\\uabcd\\uABCDzyxwvuts\",\n" " \"\\\\\\/\\r\\n\\t\\f\\bzyxwvutszyxwvuts\",\n" " \"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\",\n" " \"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCDzyxwvuts\",\n" " \"\\u1234\\uabcd\\uABCDzyxwvutszyxwvuts\",\n" " \"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\",\n" " \"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCDzyxwvuts\",\n" " \"zyxwvutszyxwvuts\\\\\\/\\r\\n\\t\\f\\b\",\n" " \"zyxwvuts\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\",\n" " \"zyxwvuts\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\",\n" " \"\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\\\\\\/\\r\\n\\t\\f\\b\",\n" " \"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\",\n" " \"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\",\n" " \"\\u1234\\uabcd\\uABCDzyxwvuts\\\\\\/\\r\\n\\t\\f\\b\",\n" " \"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\",\n" " \"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\",\n" " \"zyxwvutszyxwvuts\\u1234\\uabcd\\uABCD\",\n" " \"zyxwvuts\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\",\n" " \"zyxwvuts\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\",\n" " \"\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\\u1234\\uabcd\\uABCD\",\n" " \"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\",\n" " \"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\",\n" " \"\\u1234\\uabcd\\uABCDzyxwvuts\\u1234\\uabcd\\uABCD\",\n" " \"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\",\n" " \"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\",\n" "\"\" ,\n" "\"zyxwvuts\" ,\n" "\"\\\\\\/\\r\\n\\t\\f\\b\" ,\n" "\"\\u1234\\uabcd\\uABCD\" ,\n" "\"zyxwvutszyxwvuts\" ,\n" "\"zyxwvuts\\\\\\/\\r\\n\\t\\f\\b\" ,\n" "\"zyxwvuts\\u1234\\uabcd\\uABCD\" ,\n" "\"\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\" ,\n" "\"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\" ,\n" "\"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\" ,\n" "\"\\u1234\\uabcd\\uABCDzyxwvuts\" ,\n" "\"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\" ,\n" "\"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\" ,\n" "\"zyxwvutszyxwvutszyxwvuts\" ,\n" "\"zyxwvuts\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\" ,\n" "\"zyxwvuts\\u1234\\uabcd\\uABCDzyxwvuts\" ,\n" "\"\\\\\\/\\r\\n\\t\\f\\bzyxwvutszyxwvuts\" ,\n" "\"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\" ,\n" "\"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCDzyxwvuts\" ,\n" "\"\\u1234\\uabcd\\uABCDzyxwvutszyxwvuts\" ,\n" "\"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\" ,\n" "\"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCDzyxwvuts\" ,\n" "\"zyxwvutszyxwvuts\\\\\\/\\r\\n\\t\\f\\b\" ,\n" "\"zyxwvuts\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\" ,\n" "\"zyxwvuts\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\" ,\n" "\"\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\\\\\\/\\r\\n\\t\\f\\b\" ,\n" "\"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\" ,\n" "\"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\" ,\n" "\"\\u1234\\uabcd\\uABCDzyxwvuts\\\\\\/\\r\\n\\t\\f\\b\" ,\n" "\"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\" ,\n" "\"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\" ,\n" "\"zyxwvutszyxwvuts\\u1234\\uabcd\\uABCD\" ,\n" "\"zyxwvuts\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\" ,\n" "\"zyxwvuts\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\" ,\n" "\"\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\\u1234\\uabcd\\uABCD\" ,\n" "\"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\" ,\n" "\"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\" ,\n" "\"\\u1234\\uabcd\\uABCDzyxwvuts\\u1234\\uabcd\\uABCD\" ,\n" "\"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\" ,\n" "\"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\" ,\n" " \"\" ,\n" " \"zyxwvuts\" ,\n" " \"\\\\\\/\\r\\n\\t\\f\\b\" ,\n" " \"\\u1234\\uabcd\\uABCD\" ,\n" " \"zyxwvutszyxwvuts\" ,\n" " \"zyxwvuts\\\\\\/\\r\\n\\t\\f\\b\" ,\n" " \"zyxwvuts\\u1234\\uabcd\\uABCD\" ,\n" " \"\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\" ,\n" " \"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\" ,\n" " \"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\" ,\n" " \"\\u1234\\uabcd\\uABCDzyxwvuts\" ,\n" " \"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\" ,\n" " \"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\" ,\n" " \"zyxwvutszyxwvutszyxwvuts\" ,\n" " \"zyxwvuts\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\" ,\n" " \"zyxwvuts\\u1234\\uabcd\\uABCDzyxwvuts\" ,\n" " \"\\\\\\/\\r\\n\\t\\f\\bzyxwvutszyxwvuts\" ,\n" " \"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\" ,\n" " \"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCDzyxwvuts\" ,\n" " \"\\u1234\\uabcd\\uABCDzyxwvutszyxwvuts\" ,\n" " \"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\" ,\n" " \"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCDzyxwvuts\" ,\n" " \"zyxwvutszyxwvuts\\\\\\/\\r\\n\\t\\f\\b\" ,\n" " \"zyxwvuts\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\" ,\n" " \"zyxwvuts\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\" ,\n" " \"\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\\\\\\/\\r\\n\\t\\f\\b\" ,\n" " \"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\" ,\n" " \"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\" ,\n" " \"\\u1234\\uabcd\\uABCDzyxwvuts\\\\\\/\\r\\n\\t\\f\\b\" ,\n" " \"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\" ,\n" " \"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\" ,\n" " \"zyxwvutszyxwvuts\\u1234\\uabcd\\uABCD\" ,\n" " \"zyxwvuts\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\" ,\n" " \"zyxwvuts\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\" ,\n" " \"\\\\\\/\\r\\n\\t\\f\\bzyxwvuts\\u1234\\uabcd\\uABCD\" ,\n" " \"\\\\\\/\\r\\n\\t\\f\\b\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\" ,\n" " \"\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\" ,\n" " \"\\u1234\\uabcd\\uABCDzyxwvuts\\u1234\\uabcd\\uABCD\" ,\n" " \"\\u1234\\uabcd\\uABCD\\\\\\/\\r\\n\\t\\f\\b\\u1234\\uabcd\\uABCD\" ,\n" " \"\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\\u1234\\uabcd\\uABCD\" ,\n" "{},\n" "{ },\n" "{\"1\":1},\n" "{ \"1\" : 1 },\n" "{\"1\":1,\"2\":2},\n" "{ \"1\" : 1, \"2\" : 2 },\n" " {},\n" " { },\n" " {\"1\":1},\n" " { \"1\" : 1 },\n" " {\"1\":1,\"2\":2},\n" " { \"1\" : 1, \"2\" : 2 },\n" "{} ,\n" "{ } ,\n" "{\"1\":1} ,\n" "{ \"1\" : 1 } ,\n" "{\"1\":1,\"2\":2} ,\n" "{ \"1\" : 1, \"2\" : 2 } ,\n" " {} ,\n" " { } ,\n" " {\"1\":1} ,\n" " { \"1\" : 1 } ,\n" " {\"1\":1,\"2\":2} ,\n" " { \"1\" : 1, \"2\" : 2 } ,\n" "[],\n" "[ ],\n" "[1],\n" "[ 1 ],\n" "[1,2],\n" "[ 1, 2 ],\n" " [],\n" " [ ],\n" " [1],\n" " [ 1 ],\n" " [1,2],\n" " [ 1, 2 ],\n" "[] ,\n" "[ ] ,\n" "[1] ,\n" "[ 1 ] ,\n" "[1,2] ,\n" "[ 1, 2 ] ,\n" " [] ,\n" " [ ] ,\n" " [1] ,\n" " [ 1 ] ,\n" " [1,2] ,\n" " [ 1, 2 ] ,\n" "{\"x\":{}},\n" "{\"x\":[]},\n" "{ \"x\" : {} },\n" "{ \"x\" : [] },\n" "[{}],\n" "[[]],\n" "[ { } ],\n" "[ [ ] ],\n" " {\"x\":{}},\n" " {\"x\":[]},\n" " { \"x\" : {} },\n" " { \"x\" : [] },\n" " [{}],\n" " [[]],\n" " [ { } ],\n" " [ [ ] ],\n" "{\"x\":{}} ,\n" "{\"x\":[]} ,\n" "{ \"x\" : {} } ,\n" "{ \"x\" : [] } ,\n" "[{}] ,\n" "[[]] ,\n" "[ { } ] ,\n" "[ [ ] ] ,\n" " {\"x\":{}} ,\n" " {\"x\":[]} ,\n" " { \"x\" : {} } ,\n" " { \"x\" : [] } ,\n" " [{}] ,\n" " [[]] ,\n" " [ { } ] ,\n" " [ [ ] ] ,\n\n" "#values to NOT match\n" "Null,\n" "False,\n" "True,\n" "01,\n" "+1,\n" "1.,\n" "\" \" \",\n" "\" \\ \",\n" "\" \\x \",\n" "\"\"x,\n") matches = re.finditer(regex, test_str) for matchNum, match in enumerate(matches, start=1): print ("Match {matchNum} was found at {start}-{end}: {match}".format(matchNum = matchNum, start = match.start(), end = match.end(), match = match.group())) for groupNum in range(0, len(match.groups())): groupNum = groupNum + 1 print ("Group {groupNum} found at {start}-{end}: {group}".format(groupNum = groupNum, start = match.start(groupNum), end = match.end(groupNum), group = match.group(groupNum))) # 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