[3.13] gh-106318: Add example for str.swapcase() method (GH-144575) (#148297)

Co-authored-by: Adorilson Bezerra <adorilson@gmail.com>

diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst
index 95d281811bedc8d5c4151c39392c772015fb241d..13275dc760f815693a6b38a94b79b81f258d88da 100644 (file)
--- a/Doc/library/stdtypes.rst
+++ b/Doc/library/stdtypes.rst
@@ -2620,8 +2620,22 @@ expression support in the :mod:`re` module).
 .. method:: str.swapcase()
 
    Return a copy of the string with uppercase characters converted to lowercase and
-   vice versa. Note that it is not necessarily true that
-   ``s.swapcase().swapcase() == s``.
+   vice versa. For example:
+
+   .. doctest::
+
+      >>> 'Hello World'.swapcase()
+      'hELLO wORLD'
+
+   Note that it is not necessarily true that ``s.swapcase().swapcase() == s``.
+   For example:
+
+   .. doctest::
+
+      >>> 'straße'.swapcase().swapcase()
+      'strasse'
+
+   See also :meth:`str.lower` and :meth:`str.upper`.
 
 
 .. method:: str.title()