https://github.com/python/cpython/commit/97694de41ea316d356b826baafe584bfbc54675e
commit: 97694de41ea316d356b826baafe584bfbc54675e
branch: 3.13
author: Semyon Moroz <[email protected]>
committer: hugovk <[email protected]>
date: 2026-01-06T14:02:32Z
summary:
[3.13] gh-143331: Schedule to remove format "N" for Decimal (GH-143372)
(#143477)
(cherry picked from commit dd750b348501247d458ea8d454213d4959a8f8b9)
files:
A Doc/deprecations/pending-removal-in-3.18.rst
M Doc/deprecations/index.rst
M Doc/whatsnew/3.13.rst
M Modules/_decimal/_decimal.c
diff --git a/Doc/deprecations/index.rst b/Doc/deprecations/index.rst
index e3adce995659e7..f004724fac08ba 100644
--- a/Doc/deprecations/index.rst
+++ b/Doc/deprecations/index.rst
@@ -9,6 +9,8 @@ Deprecations
.. include:: pending-removal-in-3.17.rst
+.. include:: pending-removal-in-3.18.rst
+
.. include:: pending-removal-in-future.rst
C API Deprecations
diff --git a/Doc/deprecations/pending-removal-in-3.18.rst
b/Doc/deprecations/pending-removal-in-3.18.rst
new file mode 100644
index 00000000000000..3e799219478424
--- /dev/null
+++ b/Doc/deprecations/pending-removal-in-3.18.rst
@@ -0,0 +1,9 @@
+Pending removal in Python 3.18
+------------------------------
+
+* :mod:`decimal`:
+
+ * The non-standard and undocumented :class:`~decimal.Decimal` format
+ specifier ``'N'``, which is only supported in the :mod:`!decimal` module's
+ C implementation, has been deprecated since Python 3.13.
+ (Contributed by Serhiy Storchaka in :gh:`89902`.)
diff --git a/Doc/whatsnew/3.13.rst b/Doc/whatsnew/3.13.rst
index 21873e3a1d42ce..6f1e4487009c08 100644
--- a/Doc/whatsnew/3.13.rst
+++ b/Doc/whatsnew/3.13.rst
@@ -1870,6 +1870,7 @@ New Deprecations
* Deprecate the non-standard and undocumented :class:`~decimal.Decimal`
format specifier ``'N'``,
which is only supported in the :mod:`!decimal` module's C implementation.
+ Scheduled to be removed in Python 3.18.
(Contributed by Serhiy Storchaka in :gh:`89902`.)
* :mod:`dis`:
@@ -2034,6 +2035,8 @@ New Deprecations
.. include:: ../deprecations/pending-removal-in-3.17.rst
+.. include:: ../deprecations/pending-removal-in-3.18.rst
+
.. include:: ../deprecations/pending-removal-in-future.rst
CPython Bytecode Changes
diff --git a/Modules/_decimal/_decimal.c b/Modules/_decimal/_decimal.c
index 59ee32ab77076f..cbe7af132409a0 100644
--- a/Modules/_decimal/_decimal.c
+++ b/Modules/_decimal/_decimal.c
@@ -3462,7 +3462,8 @@ dec_format(PyObject *dec, PyObject *args)
if (size > 0 && fmt[size-1] == 'N') {
if (PyErr_WarnEx(PyExc_DeprecationWarning,
- "Format specifier 'N' is deprecated", 1) < 0) {
+ "Format specifier 'N' is deprecated and "
+ "slated for removal in Python 3.18", 1) < 0) {
return NULL;
}
}
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