Fix generator iteration

src/dependency_injector/providers.c

@@ -2653,6 +2653,10 @@ static CYTHON_INLINE void __Pyx_ExceptionSwap(PyObject **type, PyObject **value,
 static PyObject* __Pyx_PyUnicode_Join(PyObject* value_tuple, Py_ssize_t value_count, Py_ssize_t result_ulength,
                                       Py_UCS4 max_char);
 
+/* IterNext.proto */
+#define __Pyx_PyIter_Next(obj) __Pyx_PyIter_Next2(obj, NULL)
+static CYTHON_INLINE PyObject *__Pyx_PyIter_Next2(PyObject *, PyObject *);
+
 /* Import.proto */
 static PyObject *__Pyx_Import(PyObject *name, PyObject *from_list, int level);
 
@@ -3158,7 +3162,6 @@ static const char __pyx_k_load[] = "load";
 static const char __pyx_k_main[] = "__main__";
 static const char __pyx_k_memo[] = "memo";
 static const char __pyx_k_name[] = "__name__";
-static const char __pyx_k_next[] = "__next__";
 static const char __pyx_k_node[] = "node";
 static const char __pyx_k_open[] = "open";
 static const char __pyx_k_path[] = "path";
@@ -3731,7 +3734,6 @@ static PyObject *__pyx_n_s_module;
 static PyObject *__pyx_n_s_name;
 static PyObject *__pyx_n_s_name_2;
 static PyObject *__pyx_n_s_new;
-static PyObject *__pyx_n_s_next;
 static PyObject *__pyx_n_s_node;
 static PyObject *__pyx_n_s_obj;
 static PyObject *__pyx_n_s_object;
@@ -48761,27 +48763,12 @@ static PyObject *__pyx_f_19dependency_injector_9providers_8Resource__provide(str
     /* "dependency_injector/providers.pyx":2731
  *                 self.__kwargs_len,
  *             )
- *             self.__resource = initializer.__next__()             # <<<<<<<<<<<<<<
+ *             self.__resource = next(initializer)             # <<<<<<<<<<<<<<
  *             self.__shutdowner = initializer.send
  *         elif callable(self.__initializer):
  */
-    __pyx_t_3 = __Pyx_PyObject_GetAttrStr(__pyx_v_initializer, __pyx_n_s_next); if (unlikely(!__pyx_t_3)) __PYX_ERR(1, 2731, __pyx_L1_error)
+    __pyx_t_1 = __Pyx_PyIter_Next(__pyx_v_initializer); if (unlikely(!__pyx_t_1)) __PYX_ERR(1, 2731, __pyx_L1_error)
-    __Pyx_GOTREF(__pyx_t_3);
-    __pyx_t_2 = NULL;
-    if (CYTHON_UNPACK_METHODS && likely(PyMethod_Check(__pyx_t_3))) {
-      __pyx_t_2 = PyMethod_GET_SELF(__pyx_t_3);
-      if (likely(__pyx_t_2)) {
-        PyObject* function = PyMethod_GET_FUNCTION(__pyx_t_3);
-        __Pyx_INCREF(__pyx_t_2);
-        __Pyx_INCREF(function);
-        __Pyx_DECREF_SET(__pyx_t_3, function);
-      }
-    }
-    __pyx_t_1 = (__pyx_t_2) ? __Pyx_PyObject_CallOneArg(__pyx_t_3, __pyx_t_2) : __Pyx_PyObject_CallNoArg(__pyx_t_3);
-    __Pyx_XDECREF(__pyx_t_2); __pyx_t_2 = 0;
-    if (unlikely(!__pyx_t_1)) __PYX_ERR(1, 2731, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_1);
-    __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
     __Pyx_GIVEREF(__pyx_t_1);
     __Pyx_GOTREF(__pyx_v_self->__pyx___resource);
     __Pyx_DECREF(__pyx_v_self->__pyx___resource);
@@ -48790,7 +48777,7 @@ static PyObject *__pyx_f_19dependency_injector_9providers_8Resource__provide(str
 
     /* "dependency_injector/providers.pyx":2732
  *             )
- *             self.__resource = initializer.__next__()
+ *             self.__resource = next(initializer)
  *             self.__shutdowner = initializer.send             # <<<<<<<<<<<<<<
  *         elif callable(self.__initializer):
  *             self.__resource = __call(
@@ -48814,7 +48801,7 @@ static PyObject *__pyx_f_19dependency_injector_9providers_8Resource__provide(str
   }
 
   /* "dependency_injector/providers.pyx":2733
- *             self.__resource = initializer.__next__()
+ *             self.__resource = next(initializer)
  *             self.__shutdowner = initializer.send
  *         elif callable(self.__initializer):             # <<<<<<<<<<<<<<
  *             self.__resource = __call(
@@ -48876,7 +48863,7 @@ static PyObject *__pyx_f_19dependency_injector_9providers_8Resource__provide(str
     __pyx_t_6 = 0;
 
     /* "dependency_injector/providers.pyx":2733
- *             self.__resource = initializer.__next__()
+ *             self.__resource = next(initializer)
  *             self.__shutdowner = initializer.send
  *         elif callable(self.__initializer):             # <<<<<<<<<<<<<<
  *             self.__resource = __call(
@@ -90321,7 +90308,6 @@ static __Pyx_StringTabEntry __pyx_string_tab[] = {
   {&__pyx_n_s_name, __pyx_k_name, sizeof(__pyx_k_name), 0, 0, 1, 1},
   {&__pyx_n_s_name_2, __pyx_k_name_2, sizeof(__pyx_k_name_2), 0, 0, 1, 1},
   {&__pyx_n_s_new, __pyx_k_new, sizeof(__pyx_k_new), 0, 0, 1, 1},
-  {&__pyx_n_s_next, __pyx_k_next, sizeof(__pyx_k_next), 0, 0, 1, 1},
   {&__pyx_n_s_node, __pyx_k_node, sizeof(__pyx_k_node), 0, 0, 1, 1},
   {&__pyx_n_s_obj, __pyx_k_obj, sizeof(__pyx_k_obj), 0, 0, 1, 1},
   {&__pyx_n_s_object, __pyx_k_object, sizeof(__pyx_k_object), 0, 0, 1, 1},
@@ -95773,6 +95759,61 @@ bad:
 #endif
 }
 
+/* IterNext */
+static PyObject *__Pyx_PyIter_Next2Default(PyObject* defval) {
+    PyObject* exc_type;
+    __Pyx_PyThreadState_declare
+    __Pyx_PyThreadState_assign
+    exc_type = __Pyx_PyErr_Occurred();
+    if (unlikely(exc_type)) {
+        if (!defval || unlikely(!__Pyx_PyErr_GivenExceptionMatches(exc_type, PyExc_StopIteration)))
+            return NULL;
+        __Pyx_PyErr_Clear();
+        Py_INCREF(defval);
+        return defval;
+    }
+    if (defval) {
+        Py_INCREF(defval);
+        return defval;
+    }
+    __Pyx_PyErr_SetNone(PyExc_StopIteration);
+    return NULL;
+}
+static void __Pyx_PyIter_Next_ErrorNoIterator(PyObject *iterator) {
+    PyErr_Format(PyExc_TypeError,
+        "%.200s object is not an iterator", Py_TYPE(iterator)->tp_name);
+}
+static CYTHON_INLINE PyObject *__Pyx_PyIter_Next2(PyObject* iterator, PyObject* defval) {
+    PyObject* next;
+    iternextfunc iternext = Py_TYPE(iterator)->tp_iternext;
+    if (likely(iternext)) {
+#if CYTHON_USE_TYPE_SLOTS
+        next = iternext(iterator);
+        if (likely(next))
+            return next;
+        #if PY_VERSION_HEX >= 0x02070000
+        if (unlikely(iternext == &_PyObject_NextNotImplemented))
+            return NULL;
+        #endif
+#else
+        next = PyIter_Next(iterator);
+        if (likely(next))
+            return next;
+#endif
+    } else if (CYTHON_USE_TYPE_SLOTS || unlikely(!PyIter_Check(iterator))) {
+        __Pyx_PyIter_Next_ErrorNoIterator(iterator);
+        return NULL;
+    }
+#if !CYTHON_USE_TYPE_SLOTS
+    else {
+        next = PyIter_Next(iterator);
+        if (likely(next))
+            return next;
+    }
+#endif
+    return __Pyx_PyIter_Next2Default(defval);
+}
+
 /* Import */
 static PyObject *__Pyx_Import(PyObject *name, PyObject *from_list, int level) {
     PyObject *empty_list = 0;

src/dependency_injector/providers.pyx

@@ -2728,7 +2728,7 @@ cdef class Resource(Provider):
                 self.__kwargs,
                 self.__kwargs_len,
             )
-            self.__resource = initializer.__next__()
+            self.__resource = next(initializer)
             self.__shutdowner = initializer.send
         elif callable(self.__initializer):
             self.__resource = __call(