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-rw-r--r--Doc/c-api/sequence.rst9
-rw-r--r--Doc/whatsnew/3.14.rst4
-rw-r--r--Misc/NEWS.d/next/C_API/2024-12-16-07-12-15.gh-issue-127896.HmI9pk.rst2
3 files changed, 15 insertions, 0 deletions
diff --git a/Doc/c-api/sequence.rst b/Doc/c-api/sequence.rst
index ce28839..df5bf6b 100644
--- a/Doc/c-api/sequence.rst
+++ b/Doc/c-api/sequence.rst
@@ -105,6 +105,15 @@ Sequence Protocol
equivalent to the Python expression ``value in o``.
+.. c:function:: int PySequence_In(PyObject *o, PyObject *value)
+
+ Alias for :c:func:`PySequence_Contains`.
+
+ .. deprecated:: 3.14
+ The function is :term:`soft deprecated` and should no longer be used to
+ write new code.
+
+
.. c:function:: Py_ssize_t PySequence_Index(PyObject *o, PyObject *value)
Return the first index *i* for which ``o[i] == value``. On error, return
diff --git a/Doc/whatsnew/3.14.rst b/Doc/whatsnew/3.14.rst
index 0959492..d13cd2d 100644
--- a/Doc/whatsnew/3.14.rst
+++ b/Doc/whatsnew/3.14.rst
@@ -1073,6 +1073,10 @@ Deprecated
:c:macro:`!isfinite` available from :file:`math.h`
since C99. (Contributed by Sergey B Kirpichev in :gh:`119613`.)
+* The previously undocumented function :c:func:`PySequence_In` is :term:`soft deprecated`.
+ Use :c:func:`PySequence_Contains` instead.
+ (Contributed by Yuki Kobayashi in :gh:`127896`.)
+
.. Add C API deprecations above alphabetically, not here at the end.
.. include:: ../deprecations/c-api-pending-removal-in-3.15.rst
diff --git a/Misc/NEWS.d/next/C_API/2024-12-16-07-12-15.gh-issue-127896.HmI9pk.rst b/Misc/NEWS.d/next/C_API/2024-12-16-07-12-15.gh-issue-127896.HmI9pk.rst
new file mode 100644
index 0000000..82b4f56
--- /dev/null
+++ b/Misc/NEWS.d/next/C_API/2024-12-16-07-12-15.gh-issue-127896.HmI9pk.rst
@@ -0,0 +1,2 @@
+The previously undocumented function :c:func:`PySequence_In` is :term:`soft deprecated`.
+Use :c:func:`PySequence_Contains` instead.