bpo-29165: doc: make extending/newtypes more Python 3 friendly (GH-211)
* Use PyVarObject_HEAD_INIT instead of PyObject_HEAD_INIT on type struct header.
* Backport many minor fixes from Python 3 doc to minimize diff.
diff --git a/Doc/extending/newtypes.rst b/Doc/extending/newtypes.rst
index 6e275e5..ebeca05 100644
--- a/Doc/extending/newtypes.rst
+++ b/Doc/extending/newtypes.rst
@@ -79,27 +79,26 @@
Moving on, we come to the crunch --- the type object. ::
static PyTypeObject noddy_NoddyType = {
- PyObject_HEAD_INIT(NULL)
- 0, /*ob_size*/
- "noddy.Noddy", /*tp_name*/
- sizeof(noddy_NoddyObject), /*tp_basicsize*/
- 0, /*tp_itemsize*/
- 0, /*tp_dealloc*/
- 0, /*tp_print*/
- 0, /*tp_getattr*/
- 0, /*tp_setattr*/
- 0, /*tp_compare*/
- 0, /*tp_repr*/
- 0, /*tp_as_number*/
- 0, /*tp_as_sequence*/
- 0, /*tp_as_mapping*/
- 0, /*tp_hash */
- 0, /*tp_call*/
- 0, /*tp_str*/
- 0, /*tp_getattro*/
- 0, /*tp_setattro*/
- 0, /*tp_as_buffer*/
- Py_TPFLAGS_DEFAULT, /*tp_flags*/
+ PyVarObject_HEAD_INIT(NULL, 0)
+ "noddy.Noddy", /* tp_name */
+ sizeof(noddy_NoddyObject), /* tp_basicsize */
+ 0, /* tp_itemsize */
+ 0, /* tp_dealloc */
+ 0, /* tp_print */
+ 0, /* tp_getattr */
+ 0, /* tp_setattr */
+ 0, /* tp_compare */
+ 0, /* tp_repr */
+ 0, /* tp_as_number */
+ 0, /* tp_as_sequence */
+ 0, /* tp_as_mapping */
+ 0, /* tp_hash */
+ 0, /* tp_call */
+ 0, /* tp_str */
+ 0, /* tp_getattro */
+ 0, /* tp_setattro */
+ 0, /* tp_as_buffer */
+ Py_TPFLAGS_DEFAULT, /* tp_flags */
"Noddy objects", /* tp_doc */
};
@@ -111,23 +110,16 @@
This is so important that we're going to pick the top of it apart still
further::
- PyObject_HEAD_INIT(NULL)
+ PyVarObject_HEAD_INIT(NULL, 0)
This line is a bit of a wart; what we'd like to write is::
- PyObject_HEAD_INIT(&PyType_Type)
+ PyVarObject_HEAD_INIT(&PyType_Type, 0)
as the type of a type object is "type", but this isn't strictly conforming C and
some compilers complain. Fortunately, this member will be filled in for us by
:c:func:`PyType_Ready`. ::
- 0, /* ob_size */
-
-The :attr:`ob_size` field of the header is not used; its presence in the type
-structure is a historical artifact that is maintained for binary compatibility
-with extension modules compiled for older versions of Python. Always set this
-field to zero. ::
-
"noddy.Noddy", /* tp_name */
The name of our type. This will appear in the default textual representation of
@@ -171,7 +163,7 @@
Skipping a number of type methods that we don't provide, we set the class flags
to :const:`Py_TPFLAGS_DEFAULT`. ::
- Py_TPFLAGS_DEFAULT, /*tp_flags*/
+ Py_TPFLAGS_DEFAULT, /* tp_flags */
All types should include this constant in their flags. It enables all of the
members defined by the current version of Python.
@@ -244,7 +236,7 @@
Adding data and methods to the Basic example
--------------------------------------------
-Let's expend the basic example to add some data and methods. Let's also make
+Let's extend the basic example to add some data and methods. Let's also make
the type usable as a base class. We'll create a new module, :mod:`noddy2` that
adds these capabilities:
@@ -284,7 +276,7 @@
{
Py_XDECREF(self->first);
Py_XDECREF(self->last);
- self->ob_type->tp_free((PyObject*)self);
+ Py_TYPE(self)->tp_free((PyObject*)self);
}
which is assigned to the :c:member:`~PyTypeObject.tp_dealloc` member::
@@ -497,7 +489,7 @@
The method is implemented as a C function that takes a :class:`Noddy` (or
:class:`Noddy` subclass) instance as the first argument. Methods always take an
instance as the first argument. Methods often take positional and keyword
-arguments as well, but in this cased we don't take any and don't need to accept
+arguments as well, but in this case we don't take any and don't need to accept
a positional argument tuple or keyword argument dictionary. This method is
equivalent to the Python method::
@@ -806,7 +798,7 @@
Finally, we add the :const:`Py_TPFLAGS_HAVE_GC` flag to the class flags::
- Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC, /* tp_flags */
That's pretty much it. If we had written custom :c:member:`~PyTypeObject.tp_alloc` or
:c:member:`~PyTypeObject.tp_free` slots, we'd need to modify them for cyclic-garbage collection.
@@ -965,14 +957,15 @@
This function is called when the reference count of the instance of your type is
reduced to zero and the Python interpreter wants to reclaim it. If your type
-has memory to free or other clean-up to perform, put it here. The object itself
-needs to be freed here as well. Here is an example of this function::
+has memory to free or other clean-up to perform, you can put it here. The
+object itself needs to be freed here as well. Here is an example of this
+function::
static void
newdatatype_dealloc(newdatatypeobject * obj)
{
free(obj->obj_UnderlyingDatatypePtr);
- obj->ob_type->tp_free(obj);
+ Py_TYPE(obj)->tp_free(obj);
}
.. index::
@@ -1015,7 +1008,7 @@
Py_DECREF(self->my_callback);
}
- obj->ob_type->tp_free((PyObject*)self);
+ Py_TYPE(obj)->tp_free((PyObject*)self);
}
diff --git a/Doc/includes/noddy.c b/Doc/includes/noddy.c
index ec2d669..9d80bbe 100644
--- a/Doc/includes/noddy.c
+++ b/Doc/includes/noddy.c
@@ -6,27 +6,26 @@
} noddy_NoddyObject;
static PyTypeObject noddy_NoddyType = {
- PyObject_HEAD_INIT(NULL)
- 0, /*ob_size*/
- "noddy.Noddy", /*tp_name*/
- sizeof(noddy_NoddyObject), /*tp_basicsize*/
- 0, /*tp_itemsize*/
- 0, /*tp_dealloc*/
- 0, /*tp_print*/
- 0, /*tp_getattr*/
- 0, /*tp_setattr*/
- 0, /*tp_compare*/
- 0, /*tp_repr*/
- 0, /*tp_as_number*/
- 0, /*tp_as_sequence*/
- 0, /*tp_as_mapping*/
- 0, /*tp_hash */
- 0, /*tp_call*/
- 0, /*tp_str*/
- 0, /*tp_getattro*/
- 0, /*tp_setattro*/
- 0, /*tp_as_buffer*/
- Py_TPFLAGS_DEFAULT, /*tp_flags*/
+ PyVarObject_HEAD_INIT(NULL, 0)
+ "noddy.Noddy", /* tp_name */
+ sizeof(noddy_NoddyObject), /* tp_basicsize */
+ 0, /* tp_itemsize */
+ 0, /* tp_dealloc */
+ 0, /* tp_print */
+ 0, /* tp_getattr */
+ 0, /* tp_setattr */
+ 0, /* tp_compare */
+ 0, /* tp_repr */
+ 0, /* tp_as_number */
+ 0, /* tp_as_sequence */
+ 0, /* tp_as_mapping */
+ 0, /* tp_hash */
+ 0, /* tp_call */
+ 0, /* tp_str */
+ 0, /* tp_getattro */
+ 0, /* tp_setattro */
+ 0, /* tp_as_buffer */
+ Py_TPFLAGS_DEFAULT, /* tp_flags */
"Noddy objects", /* tp_doc */
};
diff --git a/Doc/includes/noddy2.c b/Doc/includes/noddy2.c
index 2caf985..94b92be 100644
--- a/Doc/includes/noddy2.c
+++ b/Doc/includes/noddy2.c
@@ -13,7 +13,7 @@
{
Py_XDECREF(self->first);
Py_XDECREF(self->last);
- self->ob_type->tp_free((PyObject*)self);
+ Py_TYPE(self)->tp_free((PyObject*)self);
}
static PyObject *
@@ -24,18 +24,16 @@
self = (Noddy *)type->tp_alloc(type, 0);
if (self != NULL) {
self->first = PyString_FromString("");
- if (self->first == NULL)
- {
+ if (self->first == NULL) {
Py_DECREF(self);
return NULL;
- }
-
+ }
+
self->last = PyString_FromString("");
- if (self->last == NULL)
- {
+ if (self->last == NULL) {
Py_DECREF(self);
return NULL;
- }
+ }
self->number = 0;
}
@@ -50,10 +48,10 @@
static char *kwlist[] = {"first", "last", "number", NULL};
- if (! PyArg_ParseTupleAndKeywords(args, kwds, "|OOi", kwlist,
- &first, &last,
+ if (! PyArg_ParseTupleAndKeywords(args, kwds, "|OOi", kwlist,
+ &first, &last,
&self->number))
- return -1;
+ return -1;
if (first) {
tmp = self->first;
@@ -111,7 +109,7 @@
result = PyString_Format(format, args);
Py_DECREF(args);
-
+
return result;
}
@@ -123,34 +121,34 @@
};
static PyTypeObject NoddyType = {
- PyObject_HEAD_INIT(NULL)
- 0, /*ob_size*/
- "noddy.Noddy", /*tp_name*/
- sizeof(Noddy), /*tp_basicsize*/
- 0, /*tp_itemsize*/
- (destructor)Noddy_dealloc, /*tp_dealloc*/
- 0, /*tp_print*/
- 0, /*tp_getattr*/
- 0, /*tp_setattr*/
- 0, /*tp_compare*/
- 0, /*tp_repr*/
- 0, /*tp_as_number*/
- 0, /*tp_as_sequence*/
- 0, /*tp_as_mapping*/
- 0, /*tp_hash */
- 0, /*tp_call*/
- 0, /*tp_str*/
- 0, /*tp_getattro*/
- 0, /*tp_setattro*/
- 0, /*tp_as_buffer*/
- Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/
+ PyVarObject_HEAD_INIT(NULL, 0)
+ "noddy.Noddy", /* tp_name */
+ sizeof(Noddy), /* tp_basicsize */
+ 0, /* tp_itemsize */
+ (destructor)Noddy_dealloc, /* tp_dealloc */
+ 0, /* tp_print */
+ 0, /* tp_getattr */
+ 0, /* tp_setattr */
+ 0, /* tp_compare */
+ 0, /* tp_repr */
+ 0, /* tp_as_number */
+ 0, /* tp_as_sequence */
+ 0, /* tp_as_mapping */
+ 0, /* tp_hash */
+ 0, /* tp_call */
+ 0, /* tp_str */
+ 0, /* tp_getattro */
+ 0, /* tp_setattro */
+ 0, /* tp_as_buffer */
+ Py_TPFLAGS_DEFAULT |
+ Py_TPFLAGS_BASETYPE, /* tp_flags */
"Noddy objects", /* tp_doc */
- 0, /* tp_traverse */
- 0, /* tp_clear */
- 0, /* tp_richcompare */
- 0, /* tp_weaklistoffset */
- 0, /* tp_iter */
- 0, /* tp_iternext */
+ 0, /* tp_traverse */
+ 0, /* tp_clear */
+ 0, /* tp_richcompare */
+ 0, /* tp_weaklistoffset */
+ 0, /* tp_iter */
+ 0, /* tp_iternext */
Noddy_methods, /* tp_methods */
Noddy_members, /* tp_members */
0, /* tp_getset */
@@ -172,7 +170,7 @@
#define PyMODINIT_FUNC void
#endif
PyMODINIT_FUNC
-initnoddy2(void)
+initnoddy2(void)
{
PyObject* m;
@@ -183,7 +181,7 @@
"Example module that creates an extension type.");
if (m == NULL)
- return;
+ return;
Py_INCREF(&NoddyType);
PyModule_AddObject(m, "Noddy", (PyObject *)&NoddyType);
diff --git a/Doc/includes/noddy3.c b/Doc/includes/noddy3.c
index 60260ad..43ec42b 100644
--- a/Doc/includes/noddy3.c
+++ b/Doc/includes/noddy3.c
@@ -13,7 +13,7 @@
{
Py_XDECREF(self->first);
Py_XDECREF(self->last);
- self->ob_type->tp_free((PyObject*)self);
+ Py_TYPE(self)->tp_free((PyObject*)self);
}
static PyObject *
@@ -24,18 +24,16 @@
self = (Noddy *)type->tp_alloc(type, 0);
if (self != NULL) {
self->first = PyString_FromString("");
- if (self->first == NULL)
- {
+ if (self->first == NULL) {
Py_DECREF(self);
return NULL;
- }
-
+ }
+
self->last = PyString_FromString("");
- if (self->last == NULL)
- {
+ if (self->last == NULL) {
Py_DECREF(self);
return NULL;
- }
+ }
self->number = 0;
}
@@ -50,10 +48,10 @@
static char *kwlist[] = {"first", "last", "number", NULL};
- if (! PyArg_ParseTupleAndKeywords(args, kwds, "|SSi", kwlist,
- &first, &last,
+ if (! PyArg_ParseTupleAndKeywords(args, kwds, "|SSi", kwlist,
+ &first, &last,
&self->number))
- return -1;
+ return -1;
if (first) {
tmp = self->first;
@@ -88,22 +86,22 @@
static int
Noddy_setfirst(Noddy *self, PyObject *value, void *closure)
{
- if (value == NULL) {
- PyErr_SetString(PyExc_TypeError, "Cannot delete the first attribute");
- return -1;
- }
-
- if (! PyString_Check(value)) {
- PyErr_SetString(PyExc_TypeError,
- "The first attribute value must be a string");
- return -1;
- }
-
- Py_DECREF(self->first);
- Py_INCREF(value);
- self->first = value;
+ if (value == NULL) {
+ PyErr_SetString(PyExc_TypeError, "Cannot delete the first attribute");
+ return -1;
+ }
- return 0;
+ if (! PyString_Check(value)) {
+ PyErr_SetString(PyExc_TypeError,
+ "The first attribute value must be a string");
+ return -1;
+ }
+
+ Py_DECREF(self->first);
+ Py_INCREF(value);
+ self->first = value;
+
+ return 0;
}
static PyObject *
@@ -116,30 +114,30 @@
static int
Noddy_setlast(Noddy *self, PyObject *value, void *closure)
{
- if (value == NULL) {
- PyErr_SetString(PyExc_TypeError, "Cannot delete the last attribute");
- return -1;
- }
-
- if (! PyString_Check(value)) {
- PyErr_SetString(PyExc_TypeError,
- "The last attribute value must be a string");
- return -1;
- }
-
- Py_DECREF(self->last);
- Py_INCREF(value);
- self->last = value;
+ if (value == NULL) {
+ PyErr_SetString(PyExc_TypeError, "Cannot delete the last attribute");
+ return -1;
+ }
- return 0;
+ if (! PyString_Check(value)) {
+ PyErr_SetString(PyExc_TypeError,
+ "The last attribute value must be a string");
+ return -1;
+ }
+
+ Py_DECREF(self->last);
+ Py_INCREF(value);
+ self->last = value;
+
+ return 0;
}
static PyGetSetDef Noddy_getseters[] = {
- {"first",
+ {"first",
(getter)Noddy_getfirst, (setter)Noddy_setfirst,
"first name",
NULL},
- {"last",
+ {"last",
(getter)Noddy_getlast, (setter)Noddy_setlast,
"last name",
NULL},
@@ -164,7 +162,7 @@
result = PyString_Format(format, args);
Py_DECREF(args);
-
+
return result;
}
@@ -176,34 +174,34 @@
};
static PyTypeObject NoddyType = {
- PyObject_HEAD_INIT(NULL)
- 0, /*ob_size*/
- "noddy.Noddy", /*tp_name*/
- sizeof(Noddy), /*tp_basicsize*/
- 0, /*tp_itemsize*/
- (destructor)Noddy_dealloc, /*tp_dealloc*/
- 0, /*tp_print*/
- 0, /*tp_getattr*/
- 0, /*tp_setattr*/
- 0, /*tp_compare*/
- 0, /*tp_repr*/
- 0, /*tp_as_number*/
- 0, /*tp_as_sequence*/
- 0, /*tp_as_mapping*/
- 0, /*tp_hash */
- 0, /*tp_call*/
- 0, /*tp_str*/
- 0, /*tp_getattro*/
- 0, /*tp_setattro*/
- 0, /*tp_as_buffer*/
- Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/
+ PyVarObject_HEAD_INIT(NULL, 0)
+ "noddy.Noddy", /* tp_name */
+ sizeof(Noddy), /* tp_basicsize */
+ 0, /* tp_itemsize */
+ (destructor)Noddy_dealloc, /* tp_dealloc */
+ 0, /* tp_print */
+ 0, /* tp_getattr */
+ 0, /* tp_setattr */
+ 0, /* tp_compare */
+ 0, /* tp_repr */
+ 0, /* tp_as_number */
+ 0, /* tp_as_sequence */
+ 0, /* tp_as_mapping */
+ 0, /* tp_hash */
+ 0, /* tp_call */
+ 0, /* tp_str */
+ 0, /* tp_getattro */
+ 0, /* tp_setattro */
+ 0, /* tp_as_buffer */
+ Py_TPFLAGS_DEFAULT |
+ Py_TPFLAGS_BASETYPE, /* tp_flags */
"Noddy objects", /* tp_doc */
- 0, /* tp_traverse */
- 0, /* tp_clear */
- 0, /* tp_richcompare */
- 0, /* tp_weaklistoffset */
- 0, /* tp_iter */
- 0, /* tp_iternext */
+ 0, /* tp_traverse */
+ 0, /* tp_clear */
+ 0, /* tp_richcompare */
+ 0, /* tp_weaklistoffset */
+ 0, /* tp_iter */
+ 0, /* tp_iternext */
Noddy_methods, /* tp_methods */
Noddy_members, /* tp_members */
Noddy_getseters, /* tp_getset */
@@ -225,7 +223,7 @@
#define PyMODINIT_FUNC void
#endif
PyMODINIT_FUNC
-initnoddy3(void)
+initnoddy3(void)
{
PyObject* m;
@@ -236,7 +234,7 @@
"Example module that creates an extension type.");
if (m == NULL)
- return;
+ return;
Py_INCREF(&NoddyType);
PyModule_AddObject(m, "Noddy", (PyObject *)&NoddyType);
diff --git a/Doc/includes/noddy4.c b/Doc/includes/noddy4.c
index 878e086..9feb71a 100644
--- a/Doc/includes/noddy4.c
+++ b/Doc/includes/noddy4.c
@@ -27,7 +27,7 @@
return 0;
}
-static int
+static int
Noddy_clear(Noddy *self)
{
PyObject *tmp;
@@ -47,7 +47,7 @@
Noddy_dealloc(Noddy* self)
{
Noddy_clear(self);
- self->ob_type->tp_free((PyObject*)self);
+ Py_TYPE(self)->tp_free((PyObject*)self);
}
static PyObject *
@@ -58,18 +58,16 @@
self = (Noddy *)type->tp_alloc(type, 0);
if (self != NULL) {
self->first = PyString_FromString("");
- if (self->first == NULL)
- {
+ if (self->first == NULL) {
Py_DECREF(self);
return NULL;
- }
-
+ }
+
self->last = PyString_FromString("");
- if (self->last == NULL)
- {
+ if (self->last == NULL) {
Py_DECREF(self);
return NULL;
- }
+ }
self->number = 0;
}
@@ -84,10 +82,10 @@
static char *kwlist[] = {"first", "last", "number", NULL};
- if (! PyArg_ParseTupleAndKeywords(args, kwds, "|OOi", kwlist,
- &first, &last,
+ if (! PyArg_ParseTupleAndKeywords(args, kwds, "|OOi", kwlist,
+ &first, &last,
&self->number))
- return -1;
+ return -1;
if (first) {
tmp = self->first;
@@ -145,7 +143,7 @@
result = PyString_Format(format, args);
Py_DECREF(args);
-
+
return result;
}
@@ -157,34 +155,35 @@
};
static PyTypeObject NoddyType = {
- PyObject_HEAD_INIT(NULL)
- 0, /*ob_size*/
- "noddy.Noddy", /*tp_name*/
- sizeof(Noddy), /*tp_basicsize*/
- 0, /*tp_itemsize*/
- (destructor)Noddy_dealloc, /*tp_dealloc*/
- 0, /*tp_print*/
- 0, /*tp_getattr*/
- 0, /*tp_setattr*/
- 0, /*tp_compare*/
- 0, /*tp_repr*/
- 0, /*tp_as_number*/
- 0, /*tp_as_sequence*/
- 0, /*tp_as_mapping*/
- 0, /*tp_hash */
- 0, /*tp_call*/
- 0, /*tp_str*/
- 0, /*tp_getattro*/
- 0, /*tp_setattro*/
- 0, /*tp_as_buffer*/
- Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+ PyVarObject_HEAD_INIT(NULL, 0)
+ "noddy.Noddy", /* tp_name */
+ sizeof(Noddy), /* tp_basicsize */
+ 0, /* tp_itemsize */
+ (destructor)Noddy_dealloc, /* tp_dealloc */
+ 0, /* tp_print */
+ 0, /* tp_getattr */
+ 0, /* tp_setattr */
+ 0, /* tp_compare */
+ 0, /* tp_repr */
+ 0, /* tp_as_number */
+ 0, /* tp_as_sequence */
+ 0, /* tp_as_mapping */
+ 0, /* tp_hash */
+ 0, /* tp_call */
+ 0, /* tp_str */
+ 0, /* tp_getattro */
+ 0, /* tp_setattro */
+ 0, /* tp_as_buffer */
+ Py_TPFLAGS_DEFAULT |
+ Py_TPFLAGS_BASETYPE |
+ Py_TPFLAGS_HAVE_GC, /* tp_flags */
"Noddy objects", /* tp_doc */
(traverseproc)Noddy_traverse, /* tp_traverse */
(inquiry)Noddy_clear, /* tp_clear */
- 0, /* tp_richcompare */
- 0, /* tp_weaklistoffset */
- 0, /* tp_iter */
- 0, /* tp_iternext */
+ 0, /* tp_richcompare */
+ 0, /* tp_weaklistoffset */
+ 0, /* tp_iter */
+ 0, /* tp_iternext */
Noddy_methods, /* tp_methods */
Noddy_members, /* tp_members */
0, /* tp_getset */
@@ -206,7 +205,7 @@
#define PyMODINIT_FUNC void
#endif
PyMODINIT_FUNC
-initnoddy4(void)
+initnoddy4(void)
{
PyObject* m;
@@ -217,7 +216,7 @@
"Example module that creates an extension type.");
if (m == NULL)
- return;
+ return;
Py_INCREF(&NoddyType);
PyModule_AddObject(m, "Noddy", (PyObject *)&NoddyType);
diff --git a/Doc/includes/setup.py b/Doc/includes/setup.py
index b853d23..a38a39d 100644
--- a/Doc/includes/setup.py
+++ b/Doc/includes/setup.py
@@ -5,4 +5,5 @@
Extension("noddy2", ["noddy2.c"]),
Extension("noddy3", ["noddy3.c"]),
Extension("noddy4", ["noddy4.c"]),
+ Extension("shoddy", ["shoddy.c"]),
])
diff --git a/Doc/includes/shoddy.c b/Doc/includes/shoddy.c
index 07a4177..4cb39db 100644
--- a/Doc/includes/shoddy.c
+++ b/Doc/includes/shoddy.c
@@ -31,8 +31,7 @@
static PyTypeObject ShoddyType = {
- PyObject_HEAD_INIT(NULL)
- 0, /* ob_size */
+ PyVarObject_HEAD_INIT(NULL, 0)
"shoddy.Shoddy", /* tp_name */
sizeof(Shoddy), /* tp_basicsize */
0, /* tp_itemsize */
@@ -52,7 +51,7 @@
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT |
- Py_TPFLAGS_BASETYPE, /* tp_flags */
+ Py_TPFLAGS_BASETYPE, /* tp_flags */
0, /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */