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Add Py_IsFinalizing()

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`@@ -67,6 +67,15 @@ Python 3.13`
`67`	`67`
`68`	`68`	See `PyWeakref_GetRef() documentation<https://docs.python.org/dev/c-api/weakref.html#c.PyWeakref_GetRef>`__.
`69`	`69`
	`70`	`+..c:function::intPy_IsFinalizing()`
	`71`	`+`
	`72`	`+ Return non-zero if the Python interpreter is shutting down, return 0`
	`73`	`+ otherwise.`
	`74`	`+`
	`75`	`+ Availability: Python 3.3 and newer.`
	`76`	`+`
	`77`	+ See `Py_IsFinalizing() documentation <https://docs.python.org/dev/c-api/init.html#c.Py_IsFinalizing>`__.
	`78`	`+`
`70`	`79`
`71`	`80`	`Python 3.12`
`72`	`81`	`-----------`

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`@@ -1,6 +1,7 @@`
`1`	`1`	`Changelog`
`2`	`2`	`=========`
`3`	`3`
	`4`	+* 2023-08-16: Add ``Py_IsFinalizing()`` function.
`4`	`5`	* 2023-07-21: Add ``PyDict_GetItemRef()`` function.
`5`	`6`	* 2023-07-18: Add ``PyModule_Add()`` function.
`6`	`7`	* 2023-07-12: Add ``PyObject_GetOptionalAttr()``,

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`@@ -846,6 +846,22 @@ PyModule_Add(PyObject mod, const char name, PyObject *value)`
`846`	`846`	`#endif`
`847`	`847`
`848`	`848`
	`849`	`+// gh-108014 added Py_IsFinalizing() to Python 3.13.0a1`
	`850`	`+// bpo-1856 added _Py_Finalizing to Python 3.2.1b1.`
	`851`	`+#if PY_VERSION_HEX < 0x030D00A1 && PY_VERSION_HEX >= 0x030201B1`
	`852`	`+PYCAPI_COMPAT_STATIC_INLINE(int)`
	`853`	`+Py_IsFinalizing(void)`
	`854`	`+{`
	`855`	`+#if PY_VERSION_HEX >= 0x030700A1`
	`856`	`+// _Py_IsFinalizing() was added to Python 3.7.0a1.`
	`857`	`+return_Py_IsFinalizing();`
	`858`	`+#else`
	`859`	`+return (_Py_Finalizing !=NULL);`
	`860`	`+#endif`
	`861`	`+}`
	`862`	`+#endif`
	`863`	`+`
	`864`	`+`
`849`	`865`	`#ifdef __cplusplus`
`850`	`866`	`}`
`851`	`867`	`#endif`

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`@@ -328,6 +328,11 @@ test_interpreter(PyObject Py_UNUSED(module), PyObject Py_UNUSED(ignored))`
`328`	`328`	`PyInterpreterState*interp2=PyThreadState_GetInterpreter(tstate);`
`329`	`329`	`assert(interp==interp2);`
`330`	`330`
	`331`	`+#if0x030300A1 <=PY_VERSION_HEX`
	`332`	`+// test Py_IsFinalizing()`
	`333`	`+assert(Py_IsFinalizing()==0);`
	`334`	`+#endif`
	`335`	`+`
`331`	`336`	`Py_RETURN_NONE;`
`332`	`337`	`}`
`333`	`338`

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