Descriptor（描述器）物件

"Descriptor" 是描述物件某些屬性的物件，它們存在於型別物件的 dictionary（字典）中。

PyObject *PyDescr_NewGetSet(PyTypeObject *type, struct PyGetSetDef *getset)

回傳值：新的參照。 為 穩定 ABI 的一部分.

Create a new get-set descriptor for extension type type from the PyGetSetDef structure getset.

Get-set descriptors expose attributes implemented by C getter and setter functions rather than stored directly in the instance. This is the same kind of descriptor created for entries in tp_getset, and it appears in Python as a types.GetSetDescriptorType object.

On success, return a strong reference to the descriptor. Return NULL with an exception set on failure.

PyObject *PyDescr_NewMember(PyTypeObject *type, struct PyMemberDef *member)

回傳值：新的參照。 為 穩定 ABI 的一部分.

Create a new member descriptor for extension type type from the PyMemberDef structure member.

Member descriptors expose fields in the type's C struct as Python attributes. This is the same kind of descriptor created for entries in tp_members, and it appears in Python as a types.MemberDescriptorType object.

On success, return a strong reference to the descriptor. Return NULL with an exception set on failure.

PyTypeObject PyMemberDescr_Type

為 穩定 ABI 的一部分.

The type object for member descriptor objects created from PyMemberDef structures. These descriptors expose fields of a C struct as attributes on a type, and correspond to types.MemberDescriptorType objects in Python.

PyTypeObject PyGetSetDescr_Type

為 穩定 ABI 的一部分.

The type object for get/set descriptor objects created from PyGetSetDef structures. These descriptors implement attributes whose value is computed by C getter and setter functions, and are used for many built-in type attributes. They correspond to types.GetSetDescriptorType objects in Python.

PyObject *PyDescr_NewMethod(PyTypeObject *type, struct PyMethodDef *meth)

回傳值：新的參照。 為 穩定 ABI 的一部分.

Create a new method descriptor for extension type type from the PyMethodDef structure meth.

Method descriptors expose C functions as methods on a type. This is the same kind of descriptor created for entries in tp_methods, and it appears in Python as a types.MethodDescriptorType object.

On success, return a strong reference to the descriptor. Return NULL with an exception set on failure.

PyTypeObject PyMethodDescr_Type

為 穩定 ABI 的一部分.

The type object for method descriptor objects created from PyMethodDef structures. These descriptors expose C functions as methods on a type, and correspond to types.MethodDescriptorType objects in Python.

struct wrapperbase

Describes a slot wrapper used by PyDescr_NewWrapper().

Each wrapperbase record stores the Python-visible name and metadata for a special method implemented by a type slot, together with the wrapper function used to adapt that slot to Python's calling convention.

PyObject *PyDescr_NewWrapper(PyTypeObject *type, struct wrapperbase *base, void *wrapped)

回傳值：新的參照。

Create a new wrapper descriptor for extension type type from the wrapperbase structure base and the wrapped slot function pointer wrapped.

Wrapper descriptors expose special methods implemented by type slots. This is the same kind of descriptor that CPython creates for slot-based special methods such as __repr__ or __add__, and it appears in Python as a types.WrapperDescriptorType object.

On success, return a strong reference to the descriptor. Return NULL with an exception set on failure.

PyTypeObject PyWrapperDescr_Type

為 穩定 ABI 的一部分.

The type object for wrapper descriptor objects created by PyDescr_NewWrapper() and PyWrapper_New(). Wrapper descriptors are used internally to expose special methods implemented via wrapper structures, and appear in Python as types.WrapperDescriptorType objects.

PyObject *PyDescr_NewClassMethod(PyTypeObject *type, PyMethodDef *method)

回傳值：新的參照。 為 穩定 ABI 的一部分.

Create a new class method descriptor for extension type type from the PyMethodDef structure method.

Class method descriptors expose C methods that receive the class rather than an instance when accessed. This is the same kind of descriptor created for METH_CLASS entries in tp_methods, and it appears in Python as a types.ClassMethodDescriptorType object.

On success, return a strong reference to the descriptor. Return NULL with an exception set on failure.

int PyDescr_IsData(PyObject *descr)

如果 descriptor 物件 descr 描述的是一個資料屬性則回傳非零值，或者如果它描述的是一個方法則回傳 0。descr 必須為一個 descriptor 物件；沒有錯誤檢查。

PyObject *PyWrapper_New(PyObject *d, PyObject *self)

回傳值：新的參照。 為 穩定 ABI 的一部分.

Create a new bound wrapper object from the wrapper descriptor d and the instance self.

This is the bound form of a wrapper descriptor created by PyDescr_NewWrapper(). CPython creates these objects when a slot wrapper is accessed through an instance, and they appear in Python as types.MethodWrapperType objects.

On success, return a strong reference to the wrapper object. Return NULL with an exception set on failure.

PyDescr_COMMON

This is a soft deprecated macro including the common fields for a descriptor object.

This was included in Python's C API by mistake; do not use it in extensions. For creating custom descriptor objects, create a class implementing the descriptor protocol (tp_descr_get and tp_descr_set).

內建描述器

PyTypeObject PyProperty_Type

為 穩定 ABI 的一部分.

The type object for property objects. This is the same object as property in the Python layer.

PyTypeObject PySuper_Type

為 穩定 ABI 的一部分.

The type object for super objects. This is the same object as super in the Python layer.

PyTypeObject PyClassMethod_Type

The type of class method objects. This is the same object as classmethod in the Python layer.

PyTypeObject PyClassMethodDescr_Type

為 穩定 ABI 的一部分.

The type object for C-level class method descriptor objects. This is the type of the descriptors created for classmethod() defined in C extension types, and corresponds to types.ClassMethodDescriptorType objects in Python.

PyObject *PyClassMethod_New(PyObject *callable)

Create a new classmethod object wrapping callable. callable must be a callable object and must not be NULL.

On success, this function returns a strong reference to a new class method descriptor. On failure, this function returns NULL with an exception set.

PyTypeObject PyStaticMethod_Type

The type of static method objects. This is the same object as staticmethod in the Python layer.

PyObject *PyStaticMethod_New(PyObject *callable)

Create a new staticmethod object wrapping callable. callable must be a callable object and must not be NULL.

On success, this function returns a strong reference to a new static method descriptor. On failure, this function returns NULL with an exception set.