diff --git a/py313.patch b/py313.patch
new file mode 100644
index 0000000..0ea7a27
--- /dev/null
+++ b/py313.patch
@@ -0,0 +1,535 @@
+Index: Cython-0.29.37/Cython/Compiler/ModuleNode.py
+===================================================================
+--- Cython-0.29.37.orig/Cython/Compiler/ModuleNode.py
++++ Cython-0.29.37/Cython/Compiler/ModuleNode.py
+@@ -2825,15 +2825,13 @@ class ModuleNode(Nodes.Node, Nodes.Block
+         code.put_incref(env.module_dict_cname, py_object_type, nanny=False)
+ 
+         code.putln(
+-            '%s = PyImport_AddModule(__Pyx_BUILTIN_MODULE_NAME); %s' % (
++            '%s = __Pyx_PyImport_AddModuleRef(__Pyx_BUILTIN_MODULE_NAME); %s' % (
+                 Naming.builtins_cname,
+                 code.error_goto_if_null(Naming.builtins_cname, self.pos)))
+-        code.put_incref(Naming.builtins_cname, py_object_type, nanny=False)
+         code.putln(
+-            '%s = PyImport_AddModule((char *) "cython_runtime"); %s' % (
++            '%s = __Pyx_PyImport_AddModuleRef((const char *) "cython_runtime"); %s' % (
+                 Naming.cython_runtime_cname,
+                 code.error_goto_if_null(Naming.cython_runtime_cname, self.pos)))
+-        code.put_incref(Naming.cython_runtime_cname, py_object_type, nanny=False)
+         code.putln(
+             'if (PyObject_SetAttrString(%s, "__builtins__", %s) < 0) %s' % (
+                 env.module_cname,
+@@ -2841,11 +2839,10 @@ class ModuleNode(Nodes.Node, Nodes.Block
+                 code.error_goto(self.pos)))
+         if Options.pre_import is not None:
+             code.putln(
+-                '%s = PyImport_AddModule("%s"); %s' % (
++                '%s = __Pyx_PyImport_AddModuleRef("%s"); %s' % (
+                     Naming.preimport_cname,
+                     Options.pre_import,
+                     code.error_goto_if_null(Naming.preimport_cname, self.pos)))
+-            code.put_incref(Naming.preimport_cname, py_object_type, nanny=False)
+ 
+     def generate_global_init_code(self, env, code):
+         # Generate code to initialise global PyObject *
+Index: Cython-0.29.37/Cython/Utility/Builtins.c
+===================================================================
+--- Cython-0.29.37.orig/Cython/Utility/Builtins.c
++++ Cython-0.29.37/Cython/Utility/Builtins.c
+@@ -175,6 +175,7 @@ static CYTHON_INLINE PyObject *__Pyx_Get
+ //@requires: Exceptions.c::PyErrFetchRestore
+ //@requires: Exceptions.c::PyErrExceptionMatches
+ 
++#if __PYX_LIMITED_VERSION_HEX < 0x030d00A1
+ static PyObject *__Pyx_GetAttr3Default(PyObject *d) {
+     __Pyx_PyThreadState_declare
+     __Pyx_PyThreadState_assign
+@@ -184,19 +185,31 @@ static PyObject *__Pyx_GetAttr3Default(P
+     Py_INCREF(d);
+     return d;
+ }
++#endif
+ 
+ static CYTHON_INLINE PyObject *__Pyx_GetAttr3(PyObject *o, PyObject *n, PyObject *d) {
+     PyObject *r = __Pyx_GetAttr(o, n);
++#if __PYX_LIMITED_VERSION_HEX >= 0x030d00A1
++    int res = PyObject_GetOptionalAttr(o, n, &r);
++    // On failure (res == -1), r is set to NULL.
++    return (res != 0) ? r : __Pyx_NewRef(d);
++#else
+     return (likely(r)) ? r : __Pyx_GetAttr3Default(d);
++#endif
+ }
+ 
+ //////////////////// HasAttr.proto ////////////////////
+ 
++#if __PYX_LIMITED_VERSION_HEX >= 0x030d00A1
++#define __Pyx_HasAttr(o, n)  PyObject_HasAttrWithError(o, n)
++#else
+ static CYTHON_INLINE int __Pyx_HasAttr(PyObject *, PyObject *); /*proto*/
++#endif
+ 
+ //////////////////// HasAttr ////////////////////
+ //@requires: ObjectHandling.c::GetAttr
+ 
++#if __PYX_LIMITED_VERSION_HEX < 0x030d00A1
+ static CYTHON_INLINE int __Pyx_HasAttr(PyObject *o, PyObject *n) {
+     PyObject *r;
+     if (unlikely(!__Pyx_PyBaseString_Check(n))) {
+@@ -213,6 +226,7 @@ static CYTHON_INLINE int __Pyx_HasAttr(P
+         return 1;
+     }
+ }
++#endif
+ 
+ //////////////////// Intern.proto ////////////////////
+ 
+@@ -278,7 +292,7 @@ static PyObject *__Pyx_PyLong_AbsNeg(PyO
+         // digits are unsigned
+         return PyLong_FromLong(((PyLongObject*)n)->ob_digit[0]);
+     }
+-#if CYTHON_COMPILING_IN_CPYTHON
++#if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX < 0x030d0000
+     {
+         PyObject *copy = _PyLong_Copy((PyLongObject*)n);
+         if (likely(copy)) {
+Index: Cython-0.29.37/Cython/Utility/Coroutine.c
+===================================================================
+--- Cython-0.29.37.orig/Cython/Utility/Coroutine.c
++++ Cython-0.29.37/Cython/Utility/Coroutine.c
+@@ -135,7 +135,7 @@ static CYTHON_INLINE PyObject *__Pyx_Cor
+ 
+ 
+ static void __Pyx_Coroutine_AwaitableIterError(PyObject *source) {
+-#if PY_VERSION_HEX >= 0x030600B3 || defined(_PyErr_FormatFromCause)
++#if PY_VERSION_HEX >= 0x030600B3 && PY_VERSION_HEX < 0x030d0000 || defined(_PyErr_FormatFromCause)
+     _PyErr_FormatFromCause(
+         PyExc_TypeError,
+         "'async for' received an invalid object "
+@@ -166,7 +166,7 @@ static void __Pyx_Coroutine_AwaitableIte
+     PyErr_Restore(exc, val2, tb);
+ #else
+     // since Py2 does not have exception chaining, it's better to avoid shadowing exceptions there
+-    source++;
++    CYTHON_UNUSED_VAR(source);
+ #endif
+ }
+ 
+@@ -489,6 +489,7 @@ static int __pyx_Generator_init(void); /
+ //@requires: Exceptions.c::RaiseException
+ //@requires: Exceptions.c::SaveResetException
+ //@requires: ObjectHandling.c::PyObjectCallMethod1
++//@requires: ObjectHandling.c::PyObjectCallOneArg
+ //@requires: ObjectHandling.c::PyObjectGetAttrStr
+ //@requires: CommonStructures.c::FetchCommonType
+ 
+@@ -822,9 +823,23 @@ PyObject *__Pyx_PyGen_Send(PyGenObject *
+             PyErr_SetNone(PyExc_StopIteration);
+         }
+         else {
++#if PY_VERSION_HEX < 0x030d00A1
+             _PyGen_SetStopIterationValue(result);
++#else
++            if (!PyTuple_Check(result) && !PyExceptionInstance_Check(result)) {
++                // delay instantiation if possible
++                PyErr_SetObject(PyExc_StopIteration, result);
++            } else {
++                PyObject *exc = __Pyx_PyObject_CallOneArg(PyExc_StopIteration, result);
++                if (likely(exc != NULL)) {
++                    PyErr_SetObject(PyExc_StopIteration, exc);
++                    Py_DECREF(exc);
++                }
++            }
++#endif
+         }
+-        Py_CLEAR(result);
++        Py_DECREF(result);
++        result = NULL;
+     }
+     return result;
+ #endif
+Index: Cython-0.29.37/Cython/Utility/Exceptions.c
+===================================================================
+--- Cython-0.29.37.orig/Cython/Utility/Exceptions.c
++++ Cython-0.29.37/Cython/Utility/Exceptions.c
+@@ -17,7 +17,7 @@ __Pyx_init_assertions_enabled();
+   #define __pyx_assertions_enabled() (1)
+ #elif PY_VERSION_HEX < 0x03080000  ||  CYTHON_COMPILING_IN_PYPY  ||  defined(Py_LIMITED_API)
+   #define __pyx_assertions_enabled() (!Py_OptimizeFlag)
+-#elif CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX >= 0x030900A6
++#elif CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX >= 0x030900A6 && PY_VERSION_HEX < 0x030d0000
+   // Py3.8+ has PyConfig from PEP 587, but only Py3.9 added read access to it.
+   // Py_OptimizeFlag is deprecated in Py3.12+
+   static int __pyx_assertions_enabled_flag;
+@@ -401,6 +401,8 @@ static int __Pyx_GetException(PyObject *
+         if (unlikely(PyException_SetTraceback(local_value, local_tb) < 0))
+             goto bad;
+     }
++    #else
++    return NULL;
+     #endif
+     // traceback may be NULL for freshly raised exceptions
+     Py_XINCREF(local_tb);
+Index: Cython-0.29.37/Cython/Utility/ImportExport.c
+===================================================================
+--- Cython-0.29.37.orig/Cython/Utility/ImportExport.c
++++ Cython-0.29.37/Cython/Utility/ImportExport.c
+@@ -233,7 +233,6 @@ static int __Pyx_SetPackagePathFromImpor
+ #endif
+ 
+ /////////////// SetPackagePathFromImportLib ///////////////
+-//@requires: ObjectHandling.c::PyObjectGetAttrStr
+ //@substitute: naming
+ 
+ // PY_VERSION_HEX >= 0x03030000
+Index: Cython-0.29.37/Cython/Utility/ModuleSetupCode.c
+===================================================================
+--- Cython-0.29.37.orig/Cython/Utility/ModuleSetupCode.c
++++ Cython-0.29.37/Cython/Utility/ModuleSetupCode.c
+@@ -604,6 +604,10 @@ class __Pyx_FakeReference {
+ 
+ #if !CYTHON_FAST_THREAD_STATE || PY_VERSION_HEX < 0x02070000
+   #define __Pyx_PyThreadState_Current PyThreadState_GET()
++#elif PY_VERSION_HEX >= 0x030d00A1
++  //#elif PY_VERSION_HEX >= 0x03050200
++  // Actually added in 3.5.2, but compiling against that does not guarantee that we get imported there.
++  #define __Pyx_PyThreadState_Current PyThreadState_GetUnchecked()
+ #elif PY_VERSION_HEX >= 0x03060000
+   //#elif PY_VERSION_HEX >= 0x03050200
+   // Actually added in 3.5.2, but compiling against that does not guarantee that we get imported there.
+@@ -648,7 +652,7 @@ static CYTHON_INLINE void * PyThread_tss
+ // PyThread_ReInitTLS() is a no-op
+ #endif /* TSS (Thread Specific Storage) API */
+ 
+-#if CYTHON_COMPILING_IN_CPYTHON || defined(_PyDict_NewPresized)
++#if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX < 0x030d0000 || defined(_PyDict_NewPresized)
+ #define __Pyx_PyDict_NewPresized(n)  ((n <= 8) ? PyDict_New() : _PyDict_NewPresized(n))
+ #else
+ #define __Pyx_PyDict_NewPresized(n)  PyDict_New()
+@@ -662,7 +666,7 @@ static CYTHON_INLINE void * PyThread_tss
+   #define __Pyx_PyNumber_InPlaceDivide(x,y)  PyNumber_InPlaceDivide(x,y)
+ #endif
+ 
+-#if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX >= 0x030500A1 && CYTHON_USE_UNICODE_INTERNALS
++#if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX >= 0x030500A1 && PY_VERSION_HEX < 0x030d0000 && CYTHON_USE_UNICODE_INTERNALS
+ #define __Pyx_PyDict_GetItemStr(dict, name)  _PyDict_GetItem_KnownHash(dict, name, ((PyASCIIObject *) name)->hash)
+ #else
+ #define __Pyx_PyDict_GetItemStr(dict, name)  PyDict_GetItem(dict, name)
+@@ -790,6 +794,16 @@ static CYTHON_INLINE void * PyThread_tss
+   #define __Pyx_PySequence_SIZE(seq)  PySequence_Size(seq)
+ #endif
+ 
++#if PY_VERSION_HEX >= 0x030d00A1
++  #define __Pyx_PyImport_AddModuleRef(name) PyImport_AddModuleRef(name)
++#else
++  static CYTHON_INLINE PyObject *__Pyx_PyImport_AddModuleRef(const char *name) {
++      PyObject *module = PyImport_AddModule(name);
++      Py_XINCREF(module);
++      return module;
++  }
++#endif
++
+ #if PY_MAJOR_VERSION >= 3
+   #define PyIntObject                  PyLongObject
+   #define PyInt_Type                   PyLong_Type
+@@ -1667,9 +1681,12 @@ static void __Pyx_FastGilFuncInit0(void)
+     __Pyx_FastGIL_Remember = __Pyx_FastGIL_Remember0;
+     __Pyx_FastGIL_Forget = __Pyx_FastGIL_Forget0;
+     capsule = PyCapsule_New(&__Pyx_FastGilFuncs, __Pyx_FastGIL_PyCapsule, NULL);
+-    abi_module = PyImport_AddModule(__Pyx_FastGIL_ABI_module);
+-    if (capsule && abi_module) {
+-      PyObject_SetAttrString(abi_module, __Pyx_FastGIL_PyCapsuleName, capsule);
++    if (capsule) {
++        abi_module = __Pyx_PyImport_AddModuleRef(__Pyx_FastGIL_ABI_module);
++        if (abi_module) {
++          PyObject_SetAttrString(abi_module, __Pyx_FastGIL_PyCapsuleName, capsule);
++          Py_DECREF(abi_module);
++        }
+     }
+     Py_XDECREF(capsule);
+   }
+Index: Cython-0.29.37/Cython/Utility/ObjectHandling.c
+===================================================================
+--- Cython-0.29.37.orig/Cython/Utility/ObjectHandling.c
++++ Cython-0.29.37/Cython/Utility/ObjectHandling.c
+@@ -198,7 +198,7 @@ static CYTHON_INLINE PyObject *__Pyx_PyI
+         next = iternext(iterator);
+         if (likely(next))
+             return next;
+-        #if PY_VERSION_HEX >= 0x02070000 && CYTHON_COMPILING_IN_CPYTHON
++        #if PY_VERSION_HEX >= 0x02070000 && PY_VERSION_HEX < 0x030d0000 && CYTHON_COMPILING_IN_CPYTHON
+         if (unlikely(iternext == &_PyObject_NextNotImplemented))
+             return NULL;
+         #endif
+@@ -1151,7 +1151,7 @@ static PyObject *__Pyx__GetNameInClass(P
+ 
+ /////////////// SetNameInClass.proto ///////////////
+ 
+-#if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX >= 0x030500A1
++#if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX >= 0x030500A1 && PY_VERSION_HEX < 0x030d0000
+ // Identifier names are always interned and have a pre-calculated hash value.
+ #define __Pyx_SetNameInClass(ns, name, value) \
+     (likely(PyDict_CheckExact(ns)) ? _PyDict_SetItem_KnownHash(ns, name, value, ((PyASCIIObject *) name)->hash) : PyObject_SetItem(ns, name, value))
+@@ -1200,7 +1200,7 @@ static CYTHON_INLINE PyObject *__Pyx__Ge
+ {
+     PyObject *result;
+ #if !CYTHON_AVOID_BORROWED_REFS
+-#if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX >= 0x030500A1
++#if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX >= 0x030500A1 && PY_VERSION_HEX < 0x030d0000
+     // Identifier names are always interned and have a pre-calculated hash value.
+     result = _PyDict_GetItem_KnownHash($moddict_cname, name, ((PyASCIIObject *) name)->hash);
+     __PYX_UPDATE_DICT_CACHE($moddict_cname, result, *dict_cached_value, *dict_version)
+@@ -1370,15 +1370,21 @@ static CYTHON_INLINE PyObject* __Pyx_PyO
+ //@requires: Exceptions.c::PyErrFetchRestore
+ //@requires: Exceptions.c::PyErrExceptionMatches
+ 
++#if __PYX_LIMITED_VERSION_HEX < 0x030d00A1
+ static void __Pyx_PyObject_GetAttrStr_ClearAttributeError(void) {
+     __Pyx_PyThreadState_declare
+     __Pyx_PyThreadState_assign
+     if (likely(__Pyx_PyErr_ExceptionMatches(PyExc_AttributeError)))
+         __Pyx_PyErr_Clear();
+ }
++#endif
+ 
+ static CYTHON_INLINE PyObject* __Pyx_PyObject_GetAttrStrNoError(PyObject* obj, PyObject* attr_name) {
+     PyObject *result;
++#if __PYX_LIMITED_VERSION_HEX >= 0x030d00A1
++    (void) PyObject_GetOptionalAttr(obj, attr_name, &result);
++    return result;
++#else
+ #if CYTHON_COMPILING_IN_CPYTHON && CYTHON_USE_TYPE_SLOTS && PY_VERSION_HEX >= 0x030700B1
+     // _PyObject_GenericGetAttrWithDict() in CPython 3.7+ can avoid raising the AttributeError.
+     // See https://bugs.python.org/issue32544
+@@ -1392,6 +1398,7 @@ static CYTHON_INLINE PyObject* __Pyx_PyO
+         __Pyx_PyObject_GetAttrStr_ClearAttributeError();
+     }
+     return result;
++#endif
+ }
+ 
+ 
+@@ -1818,14 +1825,24 @@ static PyObject* __Pyx_PyObject_CallMeth
+ //@requires: PyObjectCallOneArg
+ //@requires: PyObjectCall2Args
+ 
++#if !(CYTHON_VECTORCALL && __PYX_LIMITED_VERSION_HEX >= 0x030C00A2)
+ static PyObject* __Pyx__PyObject_CallMethod1(PyObject* method, PyObject* arg) {
+     // Separate function to avoid excessive inlining.
+     PyObject *result = __Pyx_PyObject_CallOneArg(method, arg);
+     Py_DECREF(method);
+     return result;
+ }
++#endif
+ 
+ static PyObject* __Pyx_PyObject_CallMethod1(PyObject* obj, PyObject* method_name, PyObject* arg) {
++#if CYTHON_VECTORCALL && __PYX_LIMITED_VERSION_HEX >= 0x030C00A2
++    PyObject *args[2] = {obj, arg};
++    // avoid unused functions
++    (void) __Pyx_PyObject_GetMethod;
++    (void) __Pyx_PyObject_CallOneArg;
++    (void) __Pyx_PyObject_Call2Args;
++    return PyObject_VectorcallMethod(method_name, args, 2 | PY_VECTORCALL_ARGUMENTS_OFFSET, NULL);
++#else
+     PyObject *method = NULL, *result;
+     int is_method = __Pyx_PyObject_GetMethod(obj, method_name, &method);
+     if (likely(is_method)) {
+@@ -1835,6 +1852,7 @@ static PyObject* __Pyx_PyObject_CallMeth
+     }
+     if (unlikely(!method)) return NULL;
+     return __Pyx__PyObject_CallMethod1(method, arg);
++#endif
+ }
+ 
+ 
+Index: Cython-0.29.37/Cython/Utility/Optimize.c
+===================================================================
+--- Cython-0.29.37.orig/Cython/Utility/Optimize.c
++++ Cython-0.29.37/Cython/Utility/Optimize.c
+@@ -34,7 +34,14 @@ static CYTHON_INLINE int __Pyx_PyList_Ap
+     Py_ssize_t len = Py_SIZE(list);
+     if (likely(L->allocated > len) & likely(len > (L->allocated >> 1))) {
+         Py_INCREF(x);
++        #if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX >= 0x030d0000
++        // In Py3.13a1, PyList_SET_ITEM() checks that the end index is lower than the current size.
++        // However, extending the size *before* setting the value would not be correct,
++        // so we cannot call PyList_SET_ITEM().
++        L->ob_item[len] = x;
++        #else
+         PyList_SET_ITEM(list, len, x);
++        #endif
+         __Pyx_SET_SIZE(list, len + 1);
+         return 0;
+     }
+@@ -52,7 +59,14 @@ static CYTHON_INLINE int __Pyx_ListComp_
+     Py_ssize_t len = Py_SIZE(list);
+     if (likely(L->allocated > len)) {
+         Py_INCREF(x);
++        #if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX >= 0x030d0000
++        // In Py3.13a1, PyList_SET_ITEM() checks that the end index is lower than the current size.
++        // However, extending the size *before* setting the value would not be correct,
++        // so we cannot call PyList_SET_ITEM().
++        L->ob_item[len] = x;
++        #else
+         PyList_SET_ITEM(list, len, x);
++        #endif
+         __Pyx_SET_SIZE(list, len + 1);
+         return 0;
+     }
+@@ -65,7 +79,7 @@ static CYTHON_INLINE int __Pyx_ListComp_
+ //////////////////// ListExtend.proto ////////////////////
+ 
+ static CYTHON_INLINE int __Pyx_PyList_Extend(PyObject* L, PyObject* v) {
+-#if CYTHON_COMPILING_IN_CPYTHON
++#if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX < 0x030d0000
+     PyObject* none = _PyList_Extend((PyListObject*)L, v);
+     if (unlikely(!none))
+         return -1;
+@@ -279,7 +293,7 @@ static CYTHON_INLINE PyObject *__Pyx_PyD
+ /////////////// py_dict_pop ///////////////
+ 
+ static CYTHON_INLINE PyObject *__Pyx_PyDict_Pop(PyObject *d, PyObject *key, PyObject *default_value) {
+-#if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX > 0x030600B3
++#if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX > 0x030600B3 & PY_VERSION_HEX < 0x030d0000
+     if ((1)) {
+         return _PyDict_Pop(d, key, default_value);
+     } else
+@@ -435,7 +449,7 @@ static CYTHON_INLINE int __Pyx_set_iter_
+ 
+ static CYTHON_INLINE PyObject* __Pyx_set_iterator(PyObject* iterable, int is_set,
+                                                   Py_ssize_t* p_orig_length, int* p_source_is_set) {
+-#if CYTHON_COMPILING_IN_CPYTHON
++#if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX < 0x030d0000
+     is_set = is_set || likely(PySet_CheckExact(iterable) || PyFrozenSet_CheckExact(iterable));
+     *p_source_is_set = is_set;
+     if (likely(is_set)) {
+@@ -455,7 +469,7 @@ static CYTHON_INLINE int __Pyx_set_iter_
+         PyObject* iter_obj, Py_ssize_t orig_length,
+         Py_ssize_t* ppos, PyObject **value,
+         int source_is_set) {
+-    if (!CYTHON_COMPILING_IN_CPYTHON || unlikely(!source_is_set)) {
++    if (!CYTHON_COMPILING_IN_CPYTHON || PY_VERSION_HEX >= 0x030d0000 || unlikely(!source_is_set)) {
+         *value = PyIter_Next(iter_obj);
+         if (unlikely(!*value)) {
+             return __Pyx_IterFinish();
+@@ -464,7 +478,7 @@ static CYTHON_INLINE int __Pyx_set_iter_
+         (void)ppos;
+         return 1;
+     }
+-#if CYTHON_COMPILING_IN_CPYTHON
++#if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX < 0x030d0000
+     if (unlikely(PySet_GET_SIZE(iter_obj) != orig_length)) {
+         PyErr_SetString(
+             PyExc_RuntimeError,
+Index: Cython-0.29.37/Cython/Utility/StringTools.c
+===================================================================
+--- Cython-0.29.37.orig/Cython/Utility/StringTools.c
++++ Cython-0.29.37/Cython/Utility/StringTools.c
+@@ -804,25 +804,22 @@ static CYTHON_INLINE char __Pyx_PyBytes_
+ #define __Pyx_PyString_Join PyUnicode_Join
+ #define __Pyx_PyBaseString_Join PyUnicode_Join
+ #endif
+-
+-#if CYTHON_COMPILING_IN_CPYTHON
+-    #if PY_MAJOR_VERSION < 3
+-    #define __Pyx_PyBytes_Join _PyString_Join
+-    #else
+-    #define __Pyx_PyBytes_Join _PyBytes_Join
+-    #endif
+-#else
+ static CYTHON_INLINE PyObject* __Pyx_PyBytes_Join(PyObject* sep, PyObject* values); /*proto*/
+-#endif
+-
+ 
+ //////////////////// StringJoin ////////////////////
++//@requires: ObjectHandling.c::PyObjectCallMethod1
+ 
+-#if !CYTHON_COMPILING_IN_CPYTHON
+ static CYTHON_INLINE PyObject* __Pyx_PyBytes_Join(PyObject* sep, PyObject* values) {
+-    return PyObject_CallMethodObjArgs(sep, PYIDENT("join"), values, NULL);
+-}
++    // avoid unused function
++    (void) __Pyx_PyObject_CallMethod1;
++#if CYTHON_COMPILING_IN_CPYTHON && PY_MAJOR_VERSION < 3
++    return _PyString_Join(sep, values);
++#elif CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX < 0x030d0000
++    return _PyBytes_Join(sep, values);
++#else
++    return __Pyx_PyObject_CallMethod1(sep, PYIDENT("join"), values);
+ #endif
++}
+ 
+ 
+ /////////////// JoinPyUnicode.proto ///////////////
+@@ -873,8 +870,8 @@ static PyObject* __Pyx_PyUnicode_Join(Py
+         if (!CYTHON_PEP393_ENABLED || ukind == result_ukind) {
+             memcpy((char *)result_udata + char_pos * result_ukind, udata, (size_t) (ulength * result_ukind));
+         } else {
+-            #if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX >= 0x030300F0 || defined(_PyUnicode_FastCopyCharacters)
+-            _PyUnicode_FastCopyCharacters(result_uval, char_pos, uval, 0, ulength);
++            #if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX >= 0x030300F0 || defined(_PyUnicode_CopyCharacters)
++            PyUnicode_CopyCharacters(result_uval, char_pos, uval, 0, ulength);
+             #else
+             Py_ssize_t j;
+             for (j=0; j < ulength; j++) {
+Index: Cython-0.29.37/Cython/Utility/TypeConversion.c
+===================================================================
+--- Cython-0.29.37.orig/Cython/Utility/TypeConversion.c
++++ Cython-0.29.37/Cython/Utility/TypeConversion.c
+@@ -679,8 +679,23 @@ static CYTHON_INLINE PyObject* {{TO_PY_F
+     {
+         int one = 1; int little = (int)*(unsigned char *)&one;
+         unsigned char *bytes = (unsigned char *)&value;
++#if PY_VERSION_HEX < 0x030d0000
+         return _PyLong_FromByteArray(bytes, sizeof({{TYPE}}),
+                                      little, !is_unsigned);
++#else
++	PyObject *from_bytes, *result = NULL, *kwds = NULL;
++        PyObject *py_bytes = NULL, *arg_tuple = NULL, *order_str = NULL;
++        from_bytes = PyObject_GetAttrString((PyObject*)&PyLong_Type, "from_bytes");
++        if (!from_bytes) return NULL;
++        py_bytes = PyBytes_FromStringAndSize((char*)bytes, sizeof({{TYPE}}));
++	order_str = PyUnicode_FromString(little ? "little" : "big");
++	arg_tuple = PyTuple_Pack(2, py_bytes, order_str);
++        if (!is_unsigned) {
++            // default is signed=False
++            kwds = PyDict_New();
++	}
++        result = PyObject_Call(from_bytes, arg_tuple, kwds);
++#endif
+     }
+ }
+ 
+@@ -984,6 +999,7 @@ static CYTHON_INLINE {{TYPE}} {{FROM_PY_
+             }
+  #endif
+             if (likely(v)) {
++#if PY_VERSION_HEX < 0x030d0000
+                 int one = 1; int is_little = (int)*(unsigned char *)&one;
+                 unsigned char *bytes = (unsigned char *)&val;
+                 int ret = _PyLong_AsByteArray((PyLongObject *)v,
+@@ -992,6 +1008,7 @@ static CYTHON_INLINE {{TYPE}} {{FROM_PY_
+                 Py_DECREF(v);
+                 if (likely(!ret))
+                     return val;
++#endif
+             }
+ #endif
+             return ({{TYPE}}) -1;
+Index: Cython-0.29.37/tests/run/set_iter.pyx
+===================================================================
+--- Cython-0.29.37.orig/tests/run/set_iter.pyx
++++ Cython-0.29.37/tests/run/set_iter.pyx
+@@ -65,9 +65,9 @@ def set_iter_modify(set s, int value):
+     [1, 2, 3]
+     >>> sorted(set_iter_modify(s, 3))
+     [1, 2, 3]
+-    >>> sorted(set_iter_modify(s, 4))
++    >>> sorted(set_iter_modify(s, 4))  # doctest: +ELLIPSIS
+     Traceback (most recent call last):
+-    RuntimeError: set changed size during iteration
++    RuntimeError: ...et changed size during iteration
+     """
+     for x in s:
+         s.add(value)
diff --git a/python-Cython0.changes b/python-Cython0.changes
index 8378ef4..440e531 100644
--- a/python-Cython0.changes
+++ b/python-Cython0.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Fri Oct 18 08:06:19 UTC 2024 - Markéta Machová <mmachova@suse.com>
+
+- Add py313.patch to adapt Cython0 to Python 3.13
+
 -------------------------------------------------------------------
 Sun Feb  4 15:27:06 UTC 2024 - Frank Schreiner <FSchreiner@suse.com>
 
diff --git a/python-Cython0.spec b/python-Cython0.spec
index 3fdc333..9bb027c 100644
--- a/python-Cython0.spec
+++ b/python-Cython0.spec
@@ -26,6 +26,8 @@ License:        Apache-2.0
 URL:            https://cython.org/
 Source:         https://files.pythonhosted.org/packages/source/C/Cython/Cython-%{version}.tar.gz
 Source1:        python-Cython0-rpmlintrc
+# PATCH-FIX-UPSTREAM backported https://github.com/cython/cython/pull/5767 Adapt to C-API changes in CPython 3.13
+Patch0:         py313.patch
 BuildRequires:  %{python_module devel}
 BuildRequires:  %{python_module pip}
 BuildRequires:  %{python_module setuptools}
@@ -53,7 +55,7 @@ functions and declaring C types on variables and class attributes. This
 allows the compiler to generate very efficient C code from Cython code.
 
 %prep
-%setup -q -n Cython-%{version}
+%autosetup -p1 -n Cython-%{version}
 # Fix non-executable scripts
 sed -i "s|^#!.*||" Cython/Debugger/{libpython,Cygdb}.py cython.py