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

r"
"
gm

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"\d{4}(-|)\d{2}(-|)\d{2}T\d{2}((:\d{2}|):\d{2}|)" test_str = ("1808-06-15T23:01:26\n" "1867-07-20T05:46:32\n" "2177-10-12T16:21:20\n" "2037-06-07T11:43:16\n" "2293-11-27T14:07:03\n" "2103-08-17T23:18:27\n" "2062-07-10T22:48:36\n" "2052-05-03T20:52:46\n" "1902-07-25T07:30:23\n" "1854-11-08T04:48:52\n" "1886-05-26T03:09:28\n" "1967-08-24T20:39:03\n" "2070-03-12T07:17:09\n" "2157-12-13T05:33:09\n" "1989-11-22T06:08:54\n" "2136-12-06T08:50:20\n" "1817-05-08T13:01:06\n" "2192-01-10T02:21:35\n" "1883-08-15T11:28:58\n" "1965-07-02T23:38:56\n" "1832-11-17T09:32:40\n" "2126-08-18T20:20:37\n" "2151-10-08T06:45:32\n" "1927-08-08T21:18:18\n" "1986-02-14T05:07:16\n" "1933-10-13T13:17:56\n" "2131-02-03T00:40:52\n" "2081-05-18T21:16:35\n" "1803-03-27T20:59:13\n" "2116-12-18T07:04:52\n" "2022-12-26T18:57:37\n" "2070-10-20T22:53:22\n" "2111-09-28T23:48:10\n" "2050-10-10T00:46:35\n" "1861-11-12T12:30:54\n" "2294-11-01T13:57:38\n" "1911-07-01T05:58:17\n" "2240-07-13T10:22:25\n" "2219-09-09T09:45:06\n" "1971-12-22T00:15:30\n" "2105-10-21T07:50:49\n" "1848-08-01T18:44:14\n" "2113-09-12T06:47:44\n" "2148-01-16T06:31:47\n" "2039-11-03T02:42:27\n" "1967-05-21T09:45:56\n" "2141-09-15T15:41:47\n" "2229-02-20T12:06:33\n" "2172-10-28T21:16:27\n" "1923-03-18T08:38:14\n" "2255-12-07T11:26:35\n" "2022-06-01T20:12:48\n" "2126-12-06T21:14:24\n" "1992-10-09T00:53:40\n" "1812-07-03T12:04:44\n" "2238-07-23T05:01:13\n" "2161-08-15T08:45:02\n" "2049-06-23T11:48:48\n" "2207-05-08T08:37:53\n" "2010-03-03T06:14:49\n" "2201-03-19T05:29:26\n" "2092-12-19T19:01:31\n" "2256-02-24T11:11:01\n" "2122-01-14T12:31:05\n" "2083-01-06T06:42:29\n" "2250-07-27T19:01:03\n" "1894-08-03T20:18:21\n" "2209-05-26T09:26:17\n" "2013-01-25T13:24:34\n" "2131-03-17T04:14:25\n" "1820-12-04T17:52:40\n" "1808-01-01T04:08:07\n" "2128-06-11T23:10:01\n" "2095-01-26T01:40:19\n" "2013-10-06T03:18:44\n" "2159-03-19T15:12:52\n" "1941-07-13T22:34:35\n" "1820-06-04T14:01:58\n" "2192-01-06T13:44:06\n" "2229-07-06T12:45:32\n" "1808-12-14T10:04:15\n" "1871-12-12T20:15:42\n" "2193-08-02T11:31:51\n" "2131-08-02T18:33:25\n" "1985-09-19T00:45:09\n" "1837-12-23T14:39:48\n" "2105-08-17T18:06:45\n" "2077-11-14T14:48:31\n" "2275-06-17T12:49:35\n" "1821-10-08T05:20:56\n" "2066-07-12T07:15:06\n" "1809-01-08T19:22:51\n" "1866-11-06T02:02:56\n" "2132-04-14T07:56:04\n" "2029-04-05T19:30:12\n" "1809-12-22T07:12:04\n" "2094-12-03T16:39:10\n" "1890-08-03T15:31:54\n" "2190-09-22T10:40:07\n" "2224-10-15T06:18:39\n" "1954-10-12T04:27:29\n" "1983-09-22T04:02:57\n" "1917-02-12T00:48:32\n" "2195-05-24T16:07:28\n" "2125-12-05T10:52:49\n" "2033-05-05T22:57:22\n" "2090-12-27T21:09:23\n" "2008-09-28T10:20:53\n" "1854-06-16T16:11:25\n" "1938-08-19T17:59:11\n" "2091-04-28T13:04:11\n" "1886-05-17T23:43:55\n" "2245-04-13T00:25:10\n" "1942-01-07T15:19:18\n" "2160-12-02T02:28:58\n" "2089-02-04T21:47:35\n" "1840-10-10T03:07:50\n" "1828-09-09T13:03:05\n" "1885-03-12T11:36:48\n" "1856-12-17T23:35:17\n" "1944-12-27T10:44:26\n" "2207-10-02T16:59:18\n" "2044-11-25T00:45:16\n" "2273-06-22T03:31:41\n" "1833-10-13T15:46:52\n" "1881-06-27T00:10:01\n" "2027-02-13T15:25:57\n" "1871-01-20T17:28:53\n" "2240-12-25T11:36:46\n" "2261-07-19T08:35:12\n" "2125-12-12T08:31:13\n" "1950-12-09T17:44:49\n" "1879-02-17T01:28:46\n" "2227-07-22T07:37:44\n" "2229-08-13T18:57:22\n" "1809-01-12T12:37:18\n" "2289-06-24T04:14:32\n" "2090-06-17T18:10:20\n" "2058-02-20T15:51:44\n" "2241-01-28T11:52:25\n" "1913-04-09T11:42:01\n" "2057-11-03T20:18:54\n" "1890-03-20T02:09:41\n" "2032-10-20T12:05:17\n" "1937-11-22T05:04:28\n" "2128-06-10T05:23:28\n" "2195-10-21T20:39:21\n" "2000-11-23T20:47:14\n" "2176-01-16T11:53:36\n" "2198-09-12T18:53:51\n" "2143-03-08T12:59:19\n" "1811-09-12T08:39:23\n" "2010-11-06T13:01:29\n" "2098-04-05T06:01:34\n" "2286-04-11T23:50:23\n" "2236-05-16T17:35:43\n" "2234-08-01T14:17:25\n" "2137-02-28T20:37:42\n" "1918-05-08T13:00:23\n" "2262-04-05T17:44:10\n" "2246-01-07T18:31:36\n" "2149-07-01T10:02:15\n" "2021-04-01T10:16:47\n" "1885-08-27T11:19:43\n" "1912-08-06T15:40:59\n" "1869-03-13T03:27:39\n" "1834-11-06T07:07:34\n" "1972-08-10T14:08:57\n" "2010-10-26T15:44:43\n" "2098-05-18T13:44:26\n" "1994-04-15T16:43:45\n" "1961-10-10T07:40:09\n" "1878-10-13T19:58:53\n" "1840-11-15T13:00:19\n" "1970-09-07T08:10:44\n" "1897-06-17T08:18:23\n" "1993-06-21T16:41:40\n" "1924-10-25T08:18:39\n" "1940-10-07T09:39:17\n" "1863-08-08T22:44:29\n" "2000-03-24T13:31:03\n" "1965-08-04T22:28:49\n" "2059-08-26T20:09:59\n" "2265-03-09T23:47:53\n" "1913-08-21T10:26:42\n" "2000-12-07T04:33:00\n" "1957-11-27T01:38:06\n" "1809-04-05T11:28:19\n" "2269-06-28T00:21:20\n" "1814-12-05T02:59:31\n" "2083-11-06T13:34:01\n" "2296-05-08T23:13:26\n" "1919-09-25T02:34:04\n" "1916-06-04T20:19:32\n" "2277-11-08T23:11:20\n" "1986-11-17T14:06:53\n" "2033-08-18T21:30:11\n" "1892-08-04T14:07:52\n" "2004-10-20T12:29:40\n" "2289-09-22T19:19:56\n" "2013-07-24T13:03:39\n" "2125-10-16T03:53:50\n" "1840-10-11T15:56:16\n" "2224-07-09T11:45:25\n" "2294-02-22T11:41:48\n" "2284-02-07T19:07:19\n" "2268-11-27T08:24:22\n" "2100-09-08T19:04:38\n" "2273-03-27T13:53:00\n" "2256-03-16T20:42:46\n" "2163-09-10T09:31:07\n" "2129-03-10T19:38:20\n" "2235-05-02T01:40:00\n" "2075-12-19T04:12:41\n" "1876-01-04T04:59:18\n" "2150-07-17T08:59:41\n" "2059-06-24T00:25:17\n" "2147-08-13T11:17:30\n" "1811-11-20T19:31:57\n" "2174-02-12T16:09:38\n" "1977-12-12T12:57:43\n" "1950-04-26T02:53:39\n" "2179-04-03T13:02:13\n" "1908-12-20T22:58:45\n" "2200-07-23T06:13:46\n" "2166-09-03T15:17:19\n" "2167-01-28T21:55:48\n" "1918-07-06T20:44:04\n" "1867-03-02T05:13:41\n" "2093-09-11T21:33:22\n" "2043-07-09T13:21:33\n" "1929-02-09T17:23:03\n" "2248-09-04T16:37:16\n" "1889-04-15T16:59:24\n" "2217-02-25T03:55:11\n" "2261-09-22T22:43:26\n" "2005-01-26T06:44:48\n" "1828-02-23T02:52:37\n" "2104-07-16T06:18:56\n" "2119-09-11T11:39:25\n" "1840-09-22T18:40:38\n" "2285-01-24T17:01:42\n" "1868-07-20T03:24:48\n" "1901-09-13T11:12:46\n" "2151-10-07T19:24:25\n" "1908-08-17T16:04:58\n" "1926-04-01T11:03:17\n" "1824-04-12T16:11:57\n" "2209-08-10T00:28:49\n" "1819-02-20T10:40:24\n" "2189-02-23T02:48:28\n" "1899-07-15T10:37:34\n" "1843-05-19T05:00:37\n" "2216-09-24T05:06:35\n" "2120-05-03T18:19:38\n" "1932-08-22T07:24:36\n" "2149-08-18T01:54:59\n" "2298-11-03T06:16:36\n" "2016-03-27T03:54:18\n" "1944-04-20T00:27:49\n" "2100-09-11T10:47:21\n" "2194-11-23T18:53:26\n" "2125-03-12T14:05:23\n" "1925-02-05T21:02:10\n" "1843-04-11T01:01:33\n" "2218-10-20T01:15:44\n" "2054-05-19T03:50:33\n" "1869-06-15T23:53:27\n" "1830-03-24T00:01:52\n" "1976-07-22T20:24:25\n" "2216-05-22T15:27:20\n" "1869-05-14T16:07:58\n" "2213-01-05T07:10:55\n" "1846-11-25T13:38:55\n" "1939-09-02T19:01:34\n" "2261-06-21T23:13:56\n" "2260-02-21T15:51:10\n" "1992-07-25T07:51:13\n" "2244-09-23T17:56:24\n" "1880-08-19T19:18:37\n" "2053-06-13T03:34:24\n" "2222-10-21T05:05:06\n" "1853-01-23T18:48:47\n" "2084-03-19T09:34:21\n" "2125-11-06T05:24:10\n" "1896-02-14T13:44:39\n" "2280-08-17T17:02:44\n" "1847-05-16T02:09:13\n" "1875-03-27T13:05:03\n" "2252-08-04T14:05:26\n" "2295-04-09T16:38:33\n" "2045-08-27T00:59:47\n" "1978-04-11T19:31:29\n" "2048-12-27T04:17:08\n" "2182-12-19T00:21:00\n" "1802-07-12T13:03:20\n" "2285-08-14T01:07:42\n" "1969-07-23T20:47:07\n" "2082-06-23T08:23:26\n" "2224-07-07T03:27:18\n" "1938-06-27T00:30:10\n" "2197-10-07T09:32:28\n" "2080-07-03T14:47:47\n" "1998-06-08T16:13:03\n" "1833-08-15T17:02:45\n" "1864-09-14T15:13:11\n" "1867-10-25T09:49:48\n" "2176-11-18T12:07:07\n" "2003-08-18T00:36:31\n" "2253-03-03T16:57:10\n" "2101-06-15T09:00:10\n" "2269-07-03T01:26:00\n" "1826-10-08T10:04:19\n" "1985-12-15T18:42:50\n" "1817-09-27T15:04:18\n" "1826-03-08T19:35:21\n" "1922-06-21T10:58:24\n" "2254-09-13T19:17:33\n" "2067-05-20T02:34:21\n" "1834-05-21T10:44:30\n" "2210-05-23T20:06:43\n" "1946-12-07T16:57:05\n" "2261-06-21T12:03:49\n" "1833-11-05T23:35:02\n" "2286-06-15T20:08:27\n" "2105-08-10T06:46:35\n" "2233-05-27T03:48:23\n" "1894-01-27T17:38:37\n" "2025-02-23T09:36:48\n" "2212-07-26T08:17:40\n" "2007-01-17T02:12:28\n" "1972-05-13T07:00:51\n" "2168-10-09T02:11:08\n" "2122-09-11T01:03:10\n" "1916-09-15T03:38:49\n" "2048-08-08T20:50:27\n" "2245-06-28T17:32:45\n" "1900-01-09T14:39:55\n" "2252-04-06T05:41:59\n" "2111-10-07T10:36:32\n" "1861-01-01T01:35:07\n" "2187-06-24T08:11:54\n" "1909-04-06T13:38:42\n" "2084-07-26T14:19:18\n" "1899-08-13T05:27:07\n" "2055-04-21T08:45:05\n" "1858-07-16T16:14:23\n" "2207-01-11T03:05:20\n" "2162-02-28T19:11:23\n" "2225-09-18T12:19:48\n" "2179-09-02T13:31:50\n" "1994-11-17T14:00:43\n" "1804-01-08T22:46:21\n" "1979-11-04T00:35:29\n" "2285-05-07T07:46:56\n" "2272-06-08T09:19:27\n" "1906-09-04T13:03:49\n" "2176-07-28T00:41:21\n" "2091-08-09T19:42:32\n" "1940-05-23T17:12:42\n" "1964-01-15T15:09:05\n" "1896-09-04T18:20:11\n" "2071-06-04T08:32:43\n" "1956-09-08T05:04:58\n" "1952-10-18T19:32:53\n" "2279-12-06T15:30:25\n" "1937-07-27T06:18:51\n" "1805-09-11T08:19:00\n" "2178-06-04T11:58:21\n" "1961-10-07T03:47:25\n" "2257-04-21T22:03:23\n" "2248-04-07T09:06:46\n" "2271-02-23T05:55:38\n" "2046-02-27T00:08:07\n" "1857-12-21T12:01:49\n" "1930-04-21T18:44:35\n" "2286-12-25T23:35:32\n" "2023-11-13T07:53:07\n" "1909-10-12T16:10:25\n" "1855-09-01T03:54:04\n" "2198-04-16T06:43:33\n" "2186-02-13T08:35:48\n" "1892-11-21T03:02:04\n" "1844-07-09T09:20:45\n" "2003-12-07T15:51:46\n" "1842-09-02T22:49:41\n" "2189-08-28T14:53:03\n" "2268-04-04T10:19:27\n" "1927-02-19T19:05:48\n" "2038-03-05T20:43:32\n" "1914-09-17T18:14:43\n" "1888-12-12T03:39:29\n" "1912-08-05T14:42:04\n" "1891-10-25T09:55:20\n" "2293-12-07T19:40:39\n" "1877-09-18T21:44:52\n" "1973-05-25T10:26:03\n" "1887-09-05T20:37:40\n" "1902-11-20T14:00:38\n" "1975-07-12T17:31:15\n" "2065-05-21T05:40:54\n" "2218-09-13T07:58:44\n" "2147-11-19T01:41:38\n" "1989-10-11T11:23:02\n" "2254-08-21T14:39:41\n" "1897-05-03T09:43:29\n" "2070-11-25T19:05:12\n" "2067-09-23T12:27:54\n" "1989-11-14T21:47:02\n" "2264-10-03T08:45:16\n" "2221-02-17T04:45:12\n" "1993-06-08T09:36:55\n" "2132-04-19T21:49:57\n" "2183-08-03T03:00:09\n" "2047-05-15T17:22:45\n" "2291-08-24T15:31:53\n" "2134-01-04T20:09:46\n" "2168-11-03T22:55:05\n" "2050-03-26T06:35:46\n" "2048-03-13T22:50:05\n" "2045-08-26T13:24:26\n" "2192-03-23T04:14:56\n" "2248-02-14T18:49:46\n" "2174-06-28T07:09:18\n" "2053-02-14T10:19:03\n" "1855-06-16T04:05:53\n" "1841-08-06T21:22:55\n" "1923-08-14T15:14:40\n" "2120-10-26T00:48:43\n" "2124-01-06T08:55:38\n" "2021-06-02T07:08:55\n" "2068-08-19T19:28:32\n" "2094-07-02T17:35:25\n" "1844-03-07T10:43:00\n" "1920-01-17T09:03:51\n" "1937-08-05T02:27:34\n" "2030-11-04T05:05:06\n" "2298-06-22T03:44:28\n" "2143-11-15T00:36:57\n" "2259-02-05T03:08:48\n" "2015-10-15T05:56:41\n" "2123-07-10T10:13:43\n" "1802-07-09T07:51:19\n" "2245-09-27T03:01:18\n" 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"1861-03-06T10:30:25\n" "2075-04-08T09:13:50\n" "2242-06-24T00:16:37\n" "2004-06-08T01:31:13\n" "1820-11-07T11:23:23\n" "1829-02-07T09:46:30\n" "1855-06-26T01:47:47\n" "1981-12-23T22:29:32\n" "1933-12-13T02:28:47\n" "2230-09-16T02:20:42\n" "1811-12-09T05:51:38\n" "2196-03-14T10:49:21\n" "1979-06-11T18:15:08\n" "2029-03-16T00:44:43\n" "2118-09-01T19:39:59\n" "1952-07-24T01:33:12\n" "2218-08-06T20:32:54\n" "1893-11-25T02:03:48\n" "1835-05-10T03:25:45\n" "2177-05-19T00:45:40\n" "1824-09-14T17:51:17\n" "2027-06-26T01:03:24\n" "2085-08-15T20:34:01\n" "2280-11-26T00:24:14\n" "2074-03-26T02:59:15\n" "2052-08-22T00:14:32\n" "1938-11-11T14:53:49\n" "1959-12-22T00:12:52\n" "1985-06-13T02:03:07\n" "2016-12-02T08:38:49\n" "2219-03-18T11:27:10\n" "1905-07-04T11:37:56\n" "2053-12-28T00:59:47\n" "1971-03-15T12:10:42\n" "1954-11-23T15:36:07\n" "1988-12-06T19:34:07\n" "2167-03-07T13:18:01\n" "1884-09-23T09:27:49\n" "1887-05-11T13:12:27\n" "2207-08-16T12:59:55\n" "2190-10-04T09:17:06\n" "2056-12-02T06:36:47\n" "1901-12-09T09:54:59\n" "2060-09-10T05:12:40\n" "1972-06-19T00:40:21\n" "1879-11-19T17:41:10\n" "2265-03-27T16:49:28\n" "1834-08-07T07:13:59\n" "1887-10-06T15:59:55\n" "2276-04-28T12:24:41\n" "1836-03-02T23:48:01\n" "2022-03-12T09:17:44\n" "2187-12-08T21:47:29\n" "1951-02-21T21:54:23\n" "2022-11-23T05:43:15\n" "2198-07-26T18:06:44\n" "2217-01-05T01:54:04\n" "2045-09-18T16:16:49\n" "2183-12-02T21:39:22\n" "2279-02-22T07:08:47\n" "2024-09-19T16:16:40\n" "2114-11-14T16:29:08\n" "2125-08-05T18:57:52\n" "2291-05-22T20:04:48\n" "1820-08-11T09:16:03\n" "2071-01-18T17:51:52\n" "2066-12-10T09:56:46\n" "2200-09-25T15:20:01\n" "1982-10-13T18:54:18\n" "2035-03-17T02:51:12\n" "2215-05-21T15:32:15\n" "1826-03-06T20:51:14\n" "2067-09-15T14:13:31\n" "1802-08-14T13:24:43\n" "2024-07-03T11:02:38\n" "1970-12-21T13:55:09\n" "2037-04-28T18:19:54\n" "2041-02-10T22:50:35\n" "2147-06-08T13:31:30\n" "1852-12-12T10:24:19\n" "1881-05-23T01:30:07\n" "2241-10-11T19:20:04\n" "2099-02-24T14:40:20\n" "2223-06-04T20:32:49\n" "1871-08-14T19:52:10\n" "1948-06-11T05:27:27\n" "1832-07-19T20:05:21\n" "1976-04-26T11:24:43\n" "2009-04-16T22:44:28\n" "2054-12-23T02:02:02\n" "1810-09-20T11:47:28\n" "2017-01-17T09:22:16\n" "1952-07-10T15:51:10\n" "1841-06-02T22:28:01\n" "2102-01-22T06:21:27\n" "2224-01-06T20:28:45\n" "1890-01-03T04:22:42\n" "1844-05-22T03:55:22\n" "1983-03-20T08:15:37\n" "1808-01-06T00:49:29\n" "2200-06-16T15:18:44\n" "2258-11-24T14:15:23\n" "1924-03-17T10:10:45\n" "1870-09-19T21:49:48\n" "1955-08-23T17:08:05\n" "1883-08-26T10:21:43\n" "1810-11-13T08:08:37\n" "2058-01-08T07:39:16\n" "1961-12-03T17:46:35\n" "1945-11-04T15:25:52\n" "2248-03-12T11:10:29\n" "2271-05-07T03:27:46\n" "2033-04-07T20:03:52\n" "1851-09-12T10:16:13\n" "2076-01-16T22:49:36\n" "1929-02-07T16:33:18\n" "2186-03-11T16:50:43\n" "2027-01-20T18:33:03\n" "2277-06-17T17:39:44\n" "1944-06-07T12:04:34\n" "1803-10-14T05:55:18\n" "2093-12-24T22:07:13\n" "2078-02-13T12:49:29\n" "2173-10-09T12:36:23\n" "2260-06-21T00:38:04\n" "1919-01-23T15:06:56\n" "2001-04-09T15:28:02\n" "2210-06-19T05:45:16\n" "2101-08-28T12:07:25\n" "1972-06-08T17:15:13\n" "1950-07-15T18:20:37\n" "1986-09-07T00:08:47\n" "1879-10-28T15:12:17\n" "1824-05-15T10:51:00\n" "1828-07-25T04:50:47\n" "2283-10-17T00:39:10\n" "1845-08-15T11:06:03\n" "1924-01-08T03:15:35\n" "2063-11-08T13:54:24\n" "2068-05-06T20:15:46\n" "2156-06-19T05:42:58\n" "2287-03-08T19:48:25\n" "2040-06-28T16:18:46\n" "2200-07-28T23:35:37\n" "2191-01-12T22:00:51\n" "1962-06-14T22:14:19") matches = re.finditer(regex, test_str, re.MULTILINE) 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