
DOCS . PYTHON . ORG {
}
Title:
re — Regular expression operations — Python 3.13.5 documentation
Description:
Source code: Lib/re/ This module provides regular expression matching operations similar to those found in Perl. Both patterns and strings to be searched can be Unicode strings ( str) as well as 8-...
Website Age:
30 years and 3 months (reg. 1995-03-27).
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Keywords {🔍}
match, string, matches, regular, pattern, group, expression, character, characters, flags, version, unicode, flag, matching, expressions, return, changed, patterns, ascii, words, line, groups, matched, search, object, special, python, note, column, text, bytes, set, number, added, beginning, empty, locale, strings, backslash, end, rematch, newline, default, escapes, function, result, pos, str, compiled, start,
Topics {✒️}
[a-za-z_][a-za-z_0-9] matches [a-za-z0-9_] matches [^a-za-z0-9_] 'foo1\nfoo2\n' matches ‘foo2 [a-za-z0-9_] b'\x00'-b'\x7f' regular expression objects module-level matching functions case-insensitive matching dependent exceptions exception r'static pyobject\npy_\1 regular expression operations /usr/sbin/sendmail - regular expression syntax low precedence operations primitive operations based display match objects r'\bat\b' matches ' module-level functions regular expression howto regular expression metacharacters regular expression cache regular expression produces returns '-a-b--d-' 'static pyobject\npy_myfunc separate regular expression raw string notation entire regular expression regular expression object python software foundation latin capital letter regular expression parser compiling regular expressions regular expressions sane mastering regular expressions ελληνικά english spanish polski brazilian portuguese português brasileiro turkish 简体中文 traditional chinese party regex module 'pro----gram-files' clause bsd license processing match object regular expression matches r'[a-za standard library regular expression patterns compiled regular expressions valid regular expression türkçe simplified chinese
Questions {❓}
- ) switches to ASCII-only matching, and (?
- ) switches to locale dependent matching, and (?
- *+, ++, ?
- A dictionary mapping any symbolic group names defined by (?
- Adding ?
- Corresponds to the inline flag (?
- Either escapes special characters (permitting you to match characters like '*', '?
- For example, (<)?
- For example, (?
- For example, Isaac (?
- For example, on the 6-character string 'aaaaaa', a{3,5} will match 5 'a' characters, while a{3,5}?
- For example, the expression (?
- Found a bug?
- If the pattern is (?
- If the regular expression uses the (?
- If the subsequent pattern fails to match, the stack can only be unwound to a point before the (?
- In Unicode patterns (?
- In bytes patterns (?
- In string-type repl arguments, in addition to the character escapes and backreferences described above, \g
will use the substring matched by the group named name, as defined by the (? - Like the '*', '+', and '?
- Repetition operators or quantifiers (*, +, ?
- The '*', '+', and '?
- The :?
- The first character after the '?
- This avoids ambiguity with the non-greedy modifier suffix ?
- This is a combination of the flags given to compile(), any (?
- This is an extension notation (a '?
- Thus, (?
- UNICODE and the inline flag (?
- Whitespace within the pattern is ignored, except when in a character class, or when preceded by an unescaped backslash, or within tokens like *?
- \d+)([eE][-+]?
- \w+)+)(?
- Join('(?
- Match(r"(?
- Search('(?
- Search('b(c?
- Search(r'(?
- Split(":?
- X*+, x++ and x?
- X{m,n}+ is equivalent to (?
- {m,n}?
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Libraries {📚}
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