Issue #433028: Added support of modifier spans in regular expressions.

2 files changed, 19 insertions, 0 deletions

diff --git a/Doc/library/re.rst b/Doc/library/re.rst
index dfbedd4..df5b547 100644
--- a/Doc/library/re.rst
+++ b/Doc/library/re.rst
@@ -237,6 +237,16 @@ The special characters are:
    *cannot* be retrieved after performing a match or referenced later in the
    pattern.
 
+``(?imsx-imsx:...)``
+   (Zero or more letters from the set ``'i'``, ``'m'``, ``'s'``, ``'x'``,
+   optionally followed by ``'-'`` followed by one or more letters from the
+   same set.)  The letters set or removes the corresponding flags:
+   :const:`re.I` (ignore case), :const:`re.M` (multi-line), :const:`re.S`
+   (dot matches all), and :const:`re.X` (verbose), for the part of the
+   expression.  (The flags are described in :ref:`contents-of-module-re`.)
+
+   .. versionadded: 3.7
+
 ``(?P<name>...)``
    Similar to regular parentheses, but the substring matched by the group is
    accessible via the symbolic group name *name*.  Group names must be valid
diff --git a/Doc/whatsnew/3.6.rst b/Doc/whatsnew/3.6.rst
index f15bf4d..8a57110 100644
--- a/Doc/whatsnew/3.6.rst
+++ b/Doc/whatsnew/3.6.rst
@@ -645,6 +645,15 @@ Protocol version 4 already supports this case.  (Contributed by Serhiy
 Storchaka in :issue:`24164`.)
 
 
+re
+--
+
+Added support of modifier spans in regular expressions.  Examples:
+``'(?i:p)ython'`` matches ``'python'`` and ``'Python'``, but not ``'PYTHON'``;
+``'(?i)g(?-i:v)r'`` matches ``'GvR'`` and ``'gvr'``, but not ``'GVR'``.
+(Contributed by Serhiy Storchaka in :issue:`433028`.)
+
+
 readline
 --------