Revert "Delete .venv directory"

This reverts commit 5a2693bd9f.

.venv/lib/python3.9/site-packages/multidict/_multilib/defs.h

@@ -0,0 +1,22 @@
+#ifndef _MULTIDICT_DEFS_H
+#define _MULTIDICT_DEFS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+_Py_IDENTIFIER(lower);
+
+/* We link this module statically for convenience.  If compiled as a shared
+   library instead, some compilers don't allow addresses of Python objects
+   defined in other libraries to be used in static initializers here.  The
+   DEFERRED_ADDRESS macro is used to tag the slots where such addresses
+   appear; the module init function must fill in the tagged slots at runtime.
+   The argument is for documentation -- the macro ignores it.
+*/
+#define DEFERRED_ADDRESS(ADDR) 0
+
+#ifdef __cplusplus
+}
+#endif
+#endif

.venv/lib/python3.9/site-packages/multidict/_multilib/dict.h

@@ -0,0 +1,24 @@
+#ifndef _MULTIDICT_C_H
+#define _MULTIDICT_C_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct {  // 16 or 24 for GC prefix
+    PyObject_HEAD  // 16
+    PyObject *weaklist;
+    pair_list_t pairs;
+} MultiDictObject;
+
+typedef struct {
+    PyObject_HEAD
+    PyObject *weaklist;
+    MultiDictObject *md;
+} MultiDictProxyObject;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

.venv/lib/python3.9/site-packages/multidict/_multilib/istr.h

@@ -0,0 +1,85 @@
+#ifndef _MULTIDICT_ISTR_H
+#define _MULTIDICT_ISTR_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct {
+    PyUnicodeObject str;
+    PyObject * canonical;
+} istrobject;
+
+PyDoc_STRVAR(istr__doc__, "istr class implementation");
+
+static PyTypeObject istr_type;
+
+static inline void
+istr_dealloc(istrobject *self)
+{
+    Py_XDECREF(self->canonical);
+    PyUnicode_Type.tp_dealloc((PyObject*)self);
+}
+
+static inline PyObject *
+istr_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
+{
+    PyObject *x = NULL;
+    static char *kwlist[] = {"object", "encoding", "errors", 0};
+    PyObject *encoding = NULL;
+    PyObject *errors = NULL;
+    PyObject *s = NULL;
+    PyObject * ret = NULL;
+
+    if (!PyArg_ParseTupleAndKeywords(args, kwds, "|OOO:str",
+                                     kwlist, &x, &encoding, &errors)) {
+        return NULL;
+    }
+    if (x != NULL && Py_TYPE(x) == &istr_type) {
+        Py_INCREF(x);
+        return x;
+    }
+    ret = PyUnicode_Type.tp_new(type, args, kwds);
+    if (!ret) {
+        goto fail;
+    }
+    s =_PyObject_CallMethodId(ret, &PyId_lower, NULL);
+    if (!s) {
+        goto fail;
+    }
+    ((istrobject*)ret)->canonical = s;
+    s = NULL;  /* the reference is stollen by .canonical */
+    return ret;
+fail:
+    Py_XDECREF(ret);
+    return NULL;
+}
+
+static PyTypeObject istr_type = {
+    PyVarObject_HEAD_INIT(DEFERRED_ADDRESS(&PyType_Type), 0)
+    "multidict._multidict.istr",
+    sizeof(istrobject),
+    .tp_dealloc = (destructor)istr_dealloc,
+    .tp_flags = Py_TPFLAGS_DEFAULT
+              | Py_TPFLAGS_BASETYPE
+              | Py_TPFLAGS_UNICODE_SUBCLASS,
+    .tp_doc = istr__doc__,
+    .tp_base = DEFERRED_ADDRESS(&PyUnicode_Type),
+    .tp_new = (newfunc)istr_new,
+};
+
+
+static inline int
+istr_init(void)
+{
+    istr_type.tp_base = &PyUnicode_Type;
+    if (PyType_Ready(&istr_type) < 0) {
+        return -1;
+    }
+    return 0;
+}
+
+#ifdef __cplusplus
+}
+#endif
+#endif

.venv/lib/python3.9/site-packages/multidict/_multilib/iter.h

@@ -0,0 +1,238 @@
+#ifndef _MULTIDICT_ITER_H
+#define _MULTIDICT_ITER_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+static PyTypeObject multidict_items_iter_type;
+static PyTypeObject multidict_values_iter_type;
+static PyTypeObject multidict_keys_iter_type;
+
+typedef struct multidict_iter {
+    PyObject_HEAD
+    MultiDictObject *md;  // MultiDict or CIMultiDict
+    Py_ssize_t current;
+    uint64_t version;
+} MultidictIter;
+
+static inline void
+_init_iter(MultidictIter *it, MultiDictObject *md)
+{
+    Py_INCREF(md);
+
+    it->md = md;
+    it->current = 0;
+    it->version = pair_list_version(&md->pairs);
+}
+
+static inline PyObject *
+multidict_items_iter_new(MultiDictObject *md)
+{
+    MultidictIter *it = PyObject_GC_New(
+        MultidictIter, &multidict_items_iter_type);
+    if (it == NULL) {
+        return NULL;
+    }
+
+    _init_iter(it, md);
+
+    PyObject_GC_Track(it);
+    return (PyObject *)it;
+}
+
+static inline PyObject *
+multidict_keys_iter_new(MultiDictObject *md)
+{
+    MultidictIter *it = PyObject_GC_New(
+        MultidictIter, &multidict_keys_iter_type);
+    if (it == NULL) {
+        return NULL;
+    }
+
+    _init_iter(it, md);
+
+    PyObject_GC_Track(it);
+    return (PyObject *)it;
+}
+
+static inline PyObject *
+multidict_values_iter_new(MultiDictObject *md)
+{
+    MultidictIter *it = PyObject_GC_New(
+        MultidictIter, &multidict_values_iter_type);
+    if (it == NULL) {
+        return NULL;
+    }
+
+    _init_iter(it, md);
+
+    PyObject_GC_Track(it);
+    return (PyObject *)it;
+}
+
+static inline PyObject *
+multidict_items_iter_iternext(MultidictIter *self)
+{
+    PyObject *key = NULL;
+    PyObject *value = NULL;
+    PyObject *ret = NULL;
+
+    if (self->version != pair_list_version(&self->md->pairs)) {
+        PyErr_SetString(PyExc_RuntimeError, "Dictionary changed during iteration");
+        return NULL;
+    }
+
+    if (!_pair_list_next(&self->md->pairs, &self->current, NULL, &key, &value, NULL)) {
+        PyErr_SetNone(PyExc_StopIteration);
+        return NULL;
+    }
+
+    ret = PyTuple_Pack(2, key, value);
+    if (ret == NULL) {
+        return NULL;
+    }
+
+    return ret;
+}
+
+static inline PyObject *
+multidict_values_iter_iternext(MultidictIter *self)
+{
+    PyObject *value = NULL;
+
+    if (self->version != pair_list_version(&self->md->pairs)) {
+        PyErr_SetString(PyExc_RuntimeError, "Dictionary changed during iteration");
+        return NULL;
+    }
+
+    if (!pair_list_next(&self->md->pairs, &self->current, NULL, NULL, &value)) {
+        PyErr_SetNone(PyExc_StopIteration);
+        return NULL;
+    }
+
+    Py_INCREF(value);
+
+    return value;
+}
+
+static inline PyObject *
+multidict_keys_iter_iternext(MultidictIter *self)
+{
+    PyObject *key = NULL;
+
+    if (self->version != pair_list_version(&self->md->pairs)) {
+        PyErr_SetString(PyExc_RuntimeError, "Dictionary changed during iteration");
+        return NULL;
+    }
+
+    if (!pair_list_next(&self->md->pairs, &self->current, NULL, &key, NULL)) {
+        PyErr_SetNone(PyExc_StopIteration);
+        return NULL;
+    }
+
+    Py_INCREF(key);
+
+    return key;
+}
+
+static inline void
+multidict_iter_dealloc(MultidictIter *self)
+{
+    PyObject_GC_UnTrack(self);
+    Py_XDECREF(self->md);
+    PyObject_GC_Del(self);
+}
+
+static inline int
+multidict_iter_traverse(MultidictIter *self, visitproc visit, void *arg)
+{
+    Py_VISIT(self->md);
+    return 0;
+}
+
+static inline int
+multidict_iter_clear(MultidictIter *self)
+{
+    Py_CLEAR(self->md);
+    return 0;
+}
+
+static inline PyObject *
+multidict_iter_len(MultidictIter *self)
+{
+    return PyLong_FromLong(pair_list_len(&self->md->pairs));
+}
+
+PyDoc_STRVAR(length_hint_doc,
+             "Private method returning an estimate of len(list(it)).");
+
+static PyMethodDef multidict_iter_methods[] = {
+    {
+        "__length_hint__",
+        (PyCFunction)(void(*)(void))multidict_iter_len,
+        METH_NOARGS,
+        length_hint_doc
+    },
+    {
+        NULL,
+        NULL
+    }   /* sentinel */
+};
+
+/***********************************************************************/
+
+static PyTypeObject multidict_items_iter_type = {
+    PyVarObject_HEAD_INIT(DEFERRED_ADDRESS(&PyType_Type), 0)
+    "multidict._multidict._itemsiter",         /* tp_name */
+    sizeof(MultidictIter),                     /* tp_basicsize */
+    .tp_dealloc = (destructor)multidict_iter_dealloc,
+    .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,
+    .tp_traverse = (traverseproc)multidict_iter_traverse,
+    .tp_clear = (inquiry)multidict_iter_clear,
+    .tp_iter = PyObject_SelfIter,
+    .tp_iternext = (iternextfunc)multidict_items_iter_iternext,
+    .tp_methods = multidict_iter_methods,
+};
+
+static PyTypeObject multidict_values_iter_type = {
+    PyVarObject_HEAD_INIT(DEFERRED_ADDRESS(&PyType_Type), 0)
+    "multidict._multidict._valuesiter",         /* tp_name */
+    sizeof(MultidictIter),                      /* tp_basicsize */
+    .tp_dealloc = (destructor)multidict_iter_dealloc,
+    .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,
+    .tp_traverse = (traverseproc)multidict_iter_traverse,
+    .tp_clear = (inquiry)multidict_iter_clear,
+    .tp_iter = PyObject_SelfIter,
+    .tp_iternext = (iternextfunc)multidict_values_iter_iternext,
+    .tp_methods = multidict_iter_methods,
+};
+
+static PyTypeObject multidict_keys_iter_type = {
+    PyVarObject_HEAD_INIT(DEFERRED_ADDRESS(&PyType_Type), 0)
+    "multidict._multidict._keysiter",         /* tp_name */
+    sizeof(MultidictIter),                    /* tp_basicsize */
+    .tp_dealloc = (destructor)multidict_iter_dealloc,
+    .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,
+    .tp_traverse = (traverseproc)multidict_iter_traverse,
+    .tp_clear = (inquiry)multidict_iter_clear,
+    .tp_iter = PyObject_SelfIter,
+    .tp_iternext = (iternextfunc)multidict_keys_iter_iternext,
+    .tp_methods = multidict_iter_methods,
+};
+
+static inline int
+multidict_iter_init()
+{
+    if (PyType_Ready(&multidict_items_iter_type) < 0 ||
+        PyType_Ready(&multidict_values_iter_type) < 0 ||
+        PyType_Ready(&multidict_keys_iter_type) < 0) {
+        return -1;
+    }
+    return 0;
+}
+
+#ifdef __cplusplus
+}
+#endif
+#endif

.venv/lib/python3.9/site-packages/multidict/_multilib/views.h

@@ -0,0 +1,464 @@
+#ifndef _MULTIDICT_VIEWS_H
+#define _MULTIDICT_VIEWS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+static PyTypeObject multidict_itemsview_type;
+static PyTypeObject multidict_valuesview_type;
+static PyTypeObject multidict_keysview_type;
+
+static PyObject *viewbaseset_richcmp_func;
+static PyObject *viewbaseset_and_func;
+static PyObject *viewbaseset_or_func;
+static PyObject *viewbaseset_sub_func;
+static PyObject *viewbaseset_xor_func;
+
+static PyObject *abc_itemsview_register_func;
+static PyObject *abc_keysview_register_func;
+static PyObject *abc_valuesview_register_func;
+
+static PyObject *itemsview_isdisjoint_func;
+static PyObject *itemsview_repr_func;
+
+static PyObject *keysview_repr_func;
+static PyObject *keysview_isdisjoint_func;
+
+static PyObject *valuesview_repr_func;
+
+typedef struct {
+    PyObject_HEAD
+    PyObject *md;
+} _Multidict_ViewObject;
+
+
+/********** Base **********/
+
+static inline void
+_init_view(_Multidict_ViewObject *self, PyObject *md)
+{
+    Py_INCREF(md);
+    self->md = md;
+}
+
+static inline void
+multidict_view_dealloc(_Multidict_ViewObject *self)
+{
+    PyObject_GC_UnTrack(self);
+    Py_XDECREF(self->md);
+    PyObject_GC_Del(self);
+}
+
+static inline int
+multidict_view_traverse(_Multidict_ViewObject *self, visitproc visit, void *arg)
+{
+    Py_VISIT(self->md);
+    return 0;
+}
+
+static inline int
+multidict_view_clear(_Multidict_ViewObject *self)
+{
+    Py_CLEAR(self->md);
+    return 0;
+}
+
+static inline Py_ssize_t
+multidict_view_len(_Multidict_ViewObject *self)
+{
+    return pair_list_len(&((MultiDictObject*)self->md)->pairs);
+}
+
+static inline PyObject *
+multidict_view_richcompare(PyObject *self, PyObject *other, int op)
+{
+    PyObject *ret;
+    PyObject *op_obj = PyLong_FromLong(op);
+    if (op_obj == NULL) {
+        return NULL;
+    }
+    ret = PyObject_CallFunctionObjArgs(
+        viewbaseset_richcmp_func, self, other, op_obj, NULL);
+    Py_DECREF(op_obj);
+    return ret;
+}
+
+static inline PyObject *
+multidict_view_and(PyObject *self, PyObject *other)
+{
+    return PyObject_CallFunctionObjArgs(
+        viewbaseset_and_func, self, other, NULL);
+}
+
+static inline PyObject *
+multidict_view_or(PyObject *self, PyObject *other)
+{
+    return PyObject_CallFunctionObjArgs(
+        viewbaseset_or_func, self, other, NULL);
+}
+
+static inline PyObject *
+multidict_view_sub(PyObject *self, PyObject *other)
+{
+    return PyObject_CallFunctionObjArgs(
+        viewbaseset_sub_func, self, other, NULL);
+}
+
+static inline PyObject *
+multidict_view_xor(PyObject *self, PyObject *other)
+{
+    return PyObject_CallFunctionObjArgs(
+        viewbaseset_xor_func, self, other, NULL);
+}
+
+static PyNumberMethods multidict_view_as_number = {
+    .nb_subtract = (binaryfunc)multidict_view_sub,
+    .nb_and = (binaryfunc)multidict_view_and,
+    .nb_xor = (binaryfunc)multidict_view_xor,
+    .nb_or = (binaryfunc)multidict_view_or,
+};
+
+/********** Items **********/
+
+static inline PyObject *
+multidict_itemsview_new(PyObject *md)
+{
+    _Multidict_ViewObject *mv = PyObject_GC_New(
+        _Multidict_ViewObject, &multidict_itemsview_type);
+    if (mv == NULL) {
+        return NULL;
+    }
+
+    _init_view(mv, md);
+
+    PyObject_GC_Track(mv);
+    return (PyObject *)mv;
+}
+
+static inline PyObject *
+multidict_itemsview_iter(_Multidict_ViewObject *self)
+{
+    return multidict_items_iter_new((MultiDictObject*)self->md);
+}
+
+static inline PyObject *
+multidict_itemsview_repr(_Multidict_ViewObject *self)
+{
+    return PyObject_CallFunctionObjArgs(
+        itemsview_repr_func, self, NULL);
+}
+
+static inline PyObject *
+multidict_itemsview_isdisjoint(_Multidict_ViewObject *self, PyObject *other)
+{
+    return PyObject_CallFunctionObjArgs(
+        itemsview_isdisjoint_func, self, other, NULL);
+}
+
+PyDoc_STRVAR(itemsview_isdisjoint_doc,
+             "Return True if two sets have a null intersection.");
+
+static PyMethodDef multidict_itemsview_methods[] = {
+    {
+        "isdisjoint",
+        (PyCFunction)multidict_itemsview_isdisjoint,
+        METH_O,
+        itemsview_isdisjoint_doc
+    },
+    {
+        NULL,
+        NULL
+    }   /* sentinel */
+};
+
+static inline int
+multidict_itemsview_contains(_Multidict_ViewObject *self, PyObject *obj)
+{
+    PyObject *akey  = NULL,
+             *aval  = NULL,
+             *bkey  = NULL,
+             *bval  = NULL,
+             *iter  = NULL,
+             *item  = NULL;
+    int ret1, ret2;
+
+    if (!PyTuple_Check(obj) || PyTuple_GET_SIZE(obj) != 2) {
+        return 0;
+    }
+
+    bkey = PyTuple_GET_ITEM(obj, 0);
+    bval = PyTuple_GET_ITEM(obj, 1);
+
+    iter = multidict_itemsview_iter(self);
+    if (iter == NULL) {
+        return 0;
+    }
+
+    while ((item = PyIter_Next(iter)) != NULL) {
+        akey = PyTuple_GET_ITEM(item, 0);
+        aval = PyTuple_GET_ITEM(item, 1);
+
+        ret1 = PyObject_RichCompareBool(akey, bkey, Py_EQ);
+        if (ret1 < 0) {
+            Py_DECREF(iter);
+            Py_DECREF(item);
+            return -1;
+        }
+        ret2 = PyObject_RichCompareBool(aval, bval, Py_EQ);
+        if (ret2 < 0) {
+            Py_DECREF(iter);
+            Py_DECREF(item);
+            return -1;
+        }
+        if (ret1 > 0 && ret2 > 0)
+        {
+            Py_DECREF(iter);
+            Py_DECREF(item);
+            return 1;
+        }
+
+        Py_DECREF(item);
+    }
+
+    Py_DECREF(iter);
+
+    if (PyErr_Occurred()) {
+        return -1;
+    }
+
+    return 0;
+}
+
+static PySequenceMethods multidict_itemsview_as_sequence = {
+    .sq_length = (lenfunc)multidict_view_len,
+    .sq_contains = (objobjproc)multidict_itemsview_contains,
+};
+
+static PyTypeObject multidict_itemsview_type = {
+    PyVarObject_HEAD_INIT(DEFERRED_ADDRESS(&PyType_Type), 0)
+    "multidict._multidict._ItemsView",              /* tp_name */
+    sizeof(_Multidict_ViewObject),                  /* tp_basicsize */
+    .tp_dealloc = (destructor)multidict_view_dealloc,
+    .tp_repr = (reprfunc)multidict_itemsview_repr,
+    .tp_as_number = &multidict_view_as_number,
+    .tp_as_sequence = &multidict_itemsview_as_sequence,
+    .tp_getattro = PyObject_GenericGetAttr,
+    .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,
+    .tp_traverse = (traverseproc)multidict_view_traverse,
+    .tp_clear = (inquiry)multidict_view_clear,
+    .tp_richcompare = multidict_view_richcompare,
+    .tp_iter = (getiterfunc)multidict_itemsview_iter,
+    .tp_methods = multidict_itemsview_methods,
+};
+
+
+/********** Keys **********/
+
+static inline PyObject *
+multidict_keysview_new(PyObject *md)
+{
+    _Multidict_ViewObject *mv = PyObject_GC_New(
+        _Multidict_ViewObject, &multidict_keysview_type);
+    if (mv == NULL) {
+        return NULL;
+    }
+
+    _init_view(mv, md);
+
+    PyObject_GC_Track(mv);
+    return (PyObject *)mv;
+}
+
+static inline PyObject *
+multidict_keysview_iter(_Multidict_ViewObject *self)
+{
+    return multidict_keys_iter_new(((MultiDictObject*)self->md));
+}
+
+static inline PyObject *
+multidict_keysview_repr(_Multidict_ViewObject *self)
+{
+    return PyObject_CallFunctionObjArgs(
+        keysview_repr_func, self, NULL);
+}
+
+static inline PyObject *
+multidict_keysview_isdisjoint(_Multidict_ViewObject *self, PyObject *other)
+{
+    return PyObject_CallFunctionObjArgs(
+        keysview_isdisjoint_func, self, other, NULL);
+}
+
+PyDoc_STRVAR(keysview_isdisjoint_doc,
+             "Return True if two sets have a null intersection.");
+
+static PyMethodDef multidict_keysview_methods[] = {
+    {
+        "isdisjoint",
+        (PyCFunction)multidict_keysview_isdisjoint,
+        METH_O,
+        keysview_isdisjoint_doc
+    },
+    {
+        NULL,
+        NULL
+    }   /* sentinel */
+};
+
+static inline int
+multidict_keysview_contains(_Multidict_ViewObject *self, PyObject *key)
+{
+    return pair_list_contains(&((MultiDictObject*)self->md)->pairs, key);
+}
+
+static PySequenceMethods multidict_keysview_as_sequence = {
+    .sq_length = (lenfunc)multidict_view_len,
+    .sq_contains = (objobjproc)multidict_keysview_contains,
+};
+
+static PyTypeObject multidict_keysview_type = {
+    PyVarObject_HEAD_INIT(DEFERRED_ADDRESS(&PyType_Type), 0)
+    "multidict._multidict._KeysView",              /* tp_name */
+    sizeof(_Multidict_ViewObject),                 /* tp_basicsize */
+    .tp_dealloc = (destructor)multidict_view_dealloc,
+    .tp_repr = (reprfunc)multidict_keysview_repr,
+    .tp_as_number = &multidict_view_as_number,
+    .tp_as_sequence = &multidict_keysview_as_sequence,
+    .tp_getattro = PyObject_GenericGetAttr,
+    .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,
+    .tp_traverse = (traverseproc)multidict_view_traverse,
+    .tp_clear = (inquiry)multidict_view_clear,
+    .tp_richcompare = multidict_view_richcompare,
+    .tp_iter = (getiterfunc)multidict_keysview_iter,
+    .tp_methods = multidict_keysview_methods,
+};
+
+
+/********** Values **********/
+
+static inline PyObject *
+multidict_valuesview_new(PyObject *md)
+{
+    _Multidict_ViewObject *mv = PyObject_GC_New(
+        _Multidict_ViewObject, &multidict_valuesview_type);
+    if (mv == NULL) {
+        return NULL;
+    }
+
+    _init_view(mv, md);
+
+    PyObject_GC_Track(mv);
+    return (PyObject *)mv;
+}
+
+static inline PyObject *
+multidict_valuesview_iter(_Multidict_ViewObject *self)
+{
+    return multidict_values_iter_new(((MultiDictObject*)self->md));
+}
+
+static inline PyObject *
+multidict_valuesview_repr(_Multidict_ViewObject *self)
+{
+    return PyObject_CallFunctionObjArgs(
+        valuesview_repr_func, self, NULL);
+}
+
+static PySequenceMethods multidict_valuesview_as_sequence = {
+    .sq_length = (lenfunc)multidict_view_len,
+};
+
+static PyTypeObject multidict_valuesview_type = {
+    PyVarObject_HEAD_INIT(DEFERRED_ADDRESS(&PyType_Type), 0)
+    "multidict._multidict._ValuesView",              /* tp_name */
+    sizeof(_Multidict_ViewObject),                   /* tp_basicsize */
+    .tp_dealloc = (destructor)multidict_view_dealloc,
+    .tp_repr = (reprfunc)multidict_valuesview_repr,
+    .tp_as_sequence = &multidict_valuesview_as_sequence,
+    .tp_getattro = PyObject_GenericGetAttr,
+    .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,
+    .tp_traverse = (traverseproc)multidict_view_traverse,
+    .tp_clear = (inquiry)multidict_view_clear,
+    .tp_iter = (getiterfunc)multidict_valuesview_iter,
+};
+
+
+static inline int
+multidict_views_init()
+{
+    PyObject *reg_func_call_result = NULL;
+    PyObject *module = PyImport_ImportModule("multidict._multidict_base");
+    if (module == NULL) {
+        goto fail;
+    }
+
+#define GET_MOD_ATTR(VAR, NAME)                 \
+    VAR = PyObject_GetAttrString(module, NAME); \
+    if (VAR == NULL) {                          \
+        goto fail;                              \
+    }
+
+    GET_MOD_ATTR(viewbaseset_richcmp_func, "_viewbaseset_richcmp");
+    GET_MOD_ATTR(viewbaseset_and_func, "_viewbaseset_and");
+    GET_MOD_ATTR(viewbaseset_or_func, "_viewbaseset_or");
+    GET_MOD_ATTR(viewbaseset_sub_func, "_viewbaseset_sub");
+    GET_MOD_ATTR(viewbaseset_xor_func, "_viewbaseset_xor");
+
+    GET_MOD_ATTR(abc_itemsview_register_func, "_abc_itemsview_register");
+    GET_MOD_ATTR(abc_keysview_register_func, "_abc_keysview_register");
+    GET_MOD_ATTR(abc_valuesview_register_func, "_abc_valuesview_register");
+
+    GET_MOD_ATTR(itemsview_repr_func, "_itemsview_isdisjoint");
+    GET_MOD_ATTR(itemsview_repr_func, "_itemsview_repr");
+
+    GET_MOD_ATTR(keysview_repr_func, "_keysview_repr");
+    GET_MOD_ATTR(keysview_isdisjoint_func, "_keysview_isdisjoint");
+
+    GET_MOD_ATTR(valuesview_repr_func, "_valuesview_repr");
+
+    if (PyType_Ready(&multidict_itemsview_type) < 0 ||
+        PyType_Ready(&multidict_valuesview_type) < 0 ||
+        PyType_Ready(&multidict_keysview_type) < 0)
+    {
+        goto fail;
+    }
+
+    // abc.ItemsView.register(_ItemsView)
+    reg_func_call_result = PyObject_CallFunctionObjArgs(
+        abc_itemsview_register_func, (PyObject*)&multidict_itemsview_type, NULL);
+    if (reg_func_call_result == NULL) {
+        goto fail;
+    }
+    Py_DECREF(reg_func_call_result);
+
+    // abc.KeysView.register(_KeysView)
+    reg_func_call_result = PyObject_CallFunctionObjArgs(
+        abc_keysview_register_func, (PyObject*)&multidict_keysview_type, NULL);
+    if (reg_func_call_result == NULL) {
+        goto fail;
+    }
+    Py_DECREF(reg_func_call_result);
+
+    // abc.ValuesView.register(_KeysView)
+    reg_func_call_result = PyObject_CallFunctionObjArgs(
+        abc_valuesview_register_func, (PyObject*)&multidict_valuesview_type, NULL);
+    if (reg_func_call_result == NULL) {
+        goto fail;
+    }
+    Py_DECREF(reg_func_call_result);
+
+    Py_DECREF(module);
+    return 0;
+
+fail:
+    Py_CLEAR(module);
+    return -1;
+
+#undef GET_MOD_ATTR
+}
+
+#ifdef __cplusplus
+}
+#endif
+#endif