https://github.com/python/cpython/commit/43b9344114c11e43aa53e9f66757a184c1ef420e
commit: 43b9344114c11e43aa53e9f66757a184c1ef420e
branch: 3.13
author: Miss Islington (bot) <[email protected]>
committer: hugovk <[email protected]>
date: 2026-02-08T22:15:45Z
summary:

[3.13] gh-106318: Add example for str.isalnum() (GH-137550) (#144610)

gh-106318: Add example for str.isalnum() (GH-137550)
(cherry picked from commit 3dd7a3c65ad4ac330ad44a519efa017484530e1a)

Co-authored-by: Adorilson Bezerra <[email protected]>

files:
M Doc/library/stdtypes.rst

diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst
index cca4ed1abdf545..997e897c29e384 100644
--- a/Doc/library/stdtypes.rst
+++ b/Doc/library/stdtypes.rst
@@ -1939,7 +1939,18 @@ expression support in the :mod:`re` module).
    Return ``True`` if all characters in the string are alphanumeric and there 
is at
    least one character, ``False`` otherwise.  A character ``c`` is 
alphanumeric if one
    of the following returns ``True``: ``c.isalpha()``, ``c.isdecimal()``,
-   ``c.isdigit()``, or ``c.isnumeric()``.
+   ``c.isdigit()``, or ``c.isnumeric()``. For example::
+
+   .. doctest::
+
+      >>> 'abc123'.isalnum()
+      True
+      >>> 'abc123!@#'.isalnum()
+      False
+      >>> ''.isalnum()
+      False
+      >>> ' '.isalnum()
+      False
 
 
 .. method:: str.isalpha()

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