https://github.com/python/cpython/commit/5b6e3589133fcd913a328137e11fb772072fb86b
commit: 5b6e3589133fcd913a328137e11fb772072fb86b
branch: 3.11
author: Miss Islington (bot) <[email protected]>
committer: serhiy-storchaka <[email protected]>
date: 2024-02-17T15:03:43+02:00
summary:

[3.11] gh-101699: Explain using Match.expand with \g<0> (GH-101701) (GH-115584)

Update documentation for re library to explain that a backreference `\g<0>` is
expanded to the entire string when using Match.expand().
Note that numeric backreferences to group 0 (`\0`) are not supported.

(cherry picked from commit d2d78088530433f475d9304104bbc0dac2536edd)

Co-authored-by: Stevoisiak <[email protected]>
Co-authored-by: Serhiy Storchaka <[email protected]>

files:
M Doc/library/re.rst

diff --git a/Doc/library/re.rst b/Doc/library/re.rst
index 29d8067a585150..8bc1ec63213d12 100644
--- a/Doc/library/re.rst
+++ b/Doc/library/re.rst
@@ -1336,7 +1336,8 @@ when there is no match, you can test whether there was a 
match with a simple
    Escapes such as ``\n`` are converted to the appropriate characters,
    and numeric backreferences (``\1``, ``\2``) and named backreferences
    (``\g<1>``, ``\g<name>``) are replaced by the contents of the
-   corresponding group.
+   corresponding group. The backreference ``\g<0>`` will be
+   replaced by the entire match.
 
    .. versionchanged:: 3.5
       Unmatched groups are replaced with an empty string.

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