Fixed #23613 -- Deprecated django.utils.checksums

django/utils/checksums.py

@@ -4,7 +4,16 @@ Common checksum routines.
 
 __all__ = ['luhn']
 
+import warnings
+
 from django.utils import six
+from django.utils.deprecation import RemovedInDjango20Warning
+
+warnings.warn(
+    "django.utils.checksums will be removed in Django 2.0. The "
+    "luhn() function is now included in django-localflavor 1.1+.",
+    RemovedInDjango20Warning
+)
 
 LUHN_ODD_LOOKUP = (0, 2, 4, 6, 8, 1, 3, 5, 7, 9)  # sum_of_digits(index * 2)
 

docs/internals/deprecation.txt

@@ -59,6 +59,9 @@ about each item can often be found in the release notes of two versions prior.
 
 * ``django.db.models.field.subclassing.SubfieldBase`` will be removed.
 
+* ``django.utils.checksums`` will be removed; its functionality is included
+  in django-localflavor 1.1+.
+
 .. _deprecation-removed-in-1.9:
 
 1.9

docs/releases/1.8.txt

@@ -829,3 +829,13 @@ in ``.values()`` calls or in aggregates. It has been replaced with
 :meth:`~django.db.models.Field.from_db_value`. Note that the new approach does
 not call the :meth:`~django.db.models.Field.to_python` method on assignment
 as was the case with ``SubfieldBase``.
+
+``django.utils.checksums``
+~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The ``django.utils.checksums`` module has been deprecated and will be removed
+in Django 2.0. The functionality it provided (validating checksum using the
+Luhn algorithm) was undocumented and not used in Django. The module has been
+moved to the `django-localflavor`_ package (version 1.1+).
+
+.. _django-localflavor: https://pypi.python.org/pypi/django-localflavor

tests/utils_tests/test_checksums.py

@@ -1,5 +1,12 @@
 import unittest
+import warnings
 
+from django.utils.deprecation import RemovedInDjango20Warning
+
+with warnings.catch_warnings():
+    warnings.filterwarnings(
+        'ignore', 'django.utils.checksums will be removed in Django 2.0.',
+        RemovedInDjango20Warning)
     from django.utils import checksums