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[3.14] gh-138098: Clarify strong references in PyDict_Next docs on the free-threaded build (GH-138106) (#138141)

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Co-authored-by: PrinceNaroliya <naroliyaprince@gmail.com>
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@ -301,6 +301,15 @@ Dictionary Objects
}
Py_END_CRITICAL_SECTION();
.. note::
On the free-threaded build, this function can be used safely inside a
critical section. However, the references returned for *pkey* and *pvalue*
are :term:`borrowed <borrowed reference>` and are only valid while the
critical section is held. If you need to use these objects outside the
critical section or when the critical section can be suspended, create a
:term:`strong reference <strong reference>` (for example, using
:c:func:`Py_NewRef`).
.. c:function:: int PyDict_Merge(PyObject *a, PyObject *b, int override)