8000 gh-105733: Soft-deprecate ctypes.ARRAY, rather than hard-deprecating it. by encukou · Pull Request #122281 · python/cpython · GitHub
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gh-105733: Soft-deprecate ctypes.ARRAY, rather than hard-deprecating it. #122281< 8000 /span>

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Jul 30, 2024
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gh-105733: Soft-deprecate ctypes.ARRAY, rather than hard-deprecating it. #122281

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9 changes: 9 additions & 0 deletions Doc/library/ctypes.rst
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Expand Up @@ -2688,6 +2688,15 @@ Arrays and pointers
Array subclass constructors accept positional arguments, used to
initialize the elements in order.

.. function:: ARRAY(type, length)

Create an array.
Equivalent to ``type * length``, where *type* is a
:m 10000 od:`ctypes` data type and *length* an integer.

This function is :term:`soft deprecated` in favor of multiplication.
There are no plans to remove it.


.. class:: _Pointer

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4 changes: 2 additions & 2 deletions Doc/whatsnew/3.13.rst
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Expand Up @@ -1494,8 +1494,8 @@ New Deprecations
(Contributed by Hugo van Kemenade in :gh:`80480`.)

* :mod:`ctypes`: Deprecate undocumented :func:`!ctypes.SetPointerType`
and :func:`!ctypes.ARRAY` functions.
Replace ``ctypes.ARRAY(item_type, size)`` with ``item_type * size``.
function. :term:`Soft-deprecate <soft deprecated>` the :func:`ctypes.ARRAY`
function in favor of multiplication.
(Contributed by Victor Stinner in :gh:`105733`.)

* :mod:`decimal`: Deprecate non-standard format specifier "N" for
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2 changes: 0 additions & 2 deletions Lib/ctypes/__init__.py
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Expand Up @@ -324,8 +324,6 @@ def SetPointerType(pointer, cls):
del _pointer_type_cache[id(pointer)]

def ARRAY(typ, len):
import warnings
warnings._deprecated("ctypes.ARRAY", remove=(3, 15))
return typ * len

################################################################
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14 changes: 1 addition & 13 deletions Lib/test/test_ctypes/test_arrays.py
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@@ -1,8 +1,7 @@
import ctypes
import sys
import unittest
import warnings
from ctypes import (Structure, Array, sizeof, addressof,
from ctypes import (Structure, Array, ARRAY, sizeof, addressof,
create_string_buffer, create_unicode_buffer,
c_char, c_wchar, c_byte, c_ubyte, c_short, c_ushort, c_int, c_uint,
c_long, c_ulonglong, c_float, c_double, c_longdouble)
Expand All @@ -17,13 +16,6 @@
c_long, c_ulonglong, c_float, c_double, c_longdouble


def ARRAY(*args):
# ignore DeprecationWarning in tests
with warnings.catch_warnings():
warnings.simplefilter('ignore', DeprecationWarning)
return ctypes.ARRAY(*args)


class ArrayTestCase(unittest.TestCase):
def test_inheritance_hierarchy(self):
self.assertEqual(Array.mro(), [Array, _CData, object])
Expand Down Expand Up @@ -275,10 +267,6 @@ def test_bpo36504_signed_int_overflow(self):
def test_large_array(self, size):
c_char * size

def test_deprecation(self):
with self.assertWarns(DeprecationWarning):
CharArray = ctypes.ARRAY(c_char, 3)


if __name__ == '__main__':
unittest.main()
2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Library/2024-07-25-15-41-14.gh-issue-105733.o3koJA.rst
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@@ -0,0 +1,2 @@
:func:`ctypes.ARRAY` is now :term:`soft deprecated`: it no longer emits deprecation
warnings and is not scheduled for removal.
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