Asignación de objetos en el montículo¶
-
PyObject *_PyObject_New(PyTypeObject *type)¶
- Return value: New reference.
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PyVarObject *_PyObject_NewVar(PyTypeObject *type, Py_ssize_t size)¶
- Return value: New reference.
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PyObject *PyObject_Init(PyObject *op, PyTypeObject *type)¶
- Return value: Borrowed reference. Part of the Stable ABI.
Initialize a newly allocated object op with its type and initial reference. Returns the initialized object. Other fields of the object are not initialized. Despite its name, this function is unrelated to the object’s
__init__()
method (tp_init
slot). Specifically, this function does not call the object’s__init__()
method.In general, consider this function to be a low-level routine. Use
tp_alloc
where possible. For implementingtp_alloc
for your type, preferPyType_GenericAlloc()
orPyObject_New()
.Nota
This function only initializes the object’s memory corresponding to the initial
PyObject
structure. It does not zero the rest.
-
PyVarObject *PyObject_InitVar(PyVarObject *op, PyTypeObject *type, Py_ssize_t size)¶
- Return value: Borrowed reference. Part of the Stable ABI.
Esto hace todo lo que
PyObject_Init()
hace, y también inicializa la información de longitud para un objeto de tamaño variable.Nota
This function only initializes some of the object’s memory. It does not zero the rest.
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PyObject_New(TYPE, typeobj)¶
Allocates a new Python object using the C structure type TYPE and the Python type object typeobj (
PyTypeObject*
) by callingPyObject_Malloc()
to allocate memory and initializing it likePyObject_Init()
. The caller will own the only reference to the object (i.e. its reference count will be one).Avoid calling this directly to allocate memory for an object; call the type’s
tp_alloc
slot instead.When populating a type’s
tp_alloc
slot,PyType_GenericAlloc()
is preferred over a custom function that simply calls this macro.This macro does not call
tp_alloc
,tp_new
(__new__()
), ortp_init
(__init__()
).This cannot be used for objects with
Py_TPFLAGS_HAVE_GC
set intp_flags
; usePyObject_GC_New
instead.Memory allocated by this macro must be freed with
PyObject_Free()
(usually called via the object’stp_free
slot).Nota
The returned memory is not guaranteed to have been completely zeroed before it was initialized.
Nota
This macro does not construct a fully initialized object of the given type; it merely allocates memory and prepares it for further initialization by
tp_init
. To construct a fully initialized object, call typeobj instead. For example:PyObject *foo = PyObject_CallNoArgs((PyObject *)&PyFoo_Type);
Ver también
-
PyObject_NewVar(TYPE, typeobj, size)¶
Like
PyObject_New
except:It allocates enough memory for the TYPE structure plus size (
Py_ssize_t
) fields of the size given by thetp_itemsize
field of typeobj.The memory is initialized like
PyObject_InitVar()
.
This is useful for implementing objects like tuples, which are able to determine their size at construction time. Embedding the array of fields into the same allocation decreases the number of allocations, improving the memory management efficiency.
Avoid calling this directly to allocate memory for an object; call the type’s
tp_alloc
slot instead.When populating a type’s
tp_alloc
slot,PyType_GenericAlloc()
is preferred over a custom function that simply calls this macro.This cannot be used for objects with
Py_TPFLAGS_HAVE_GC
set intp_flags
; usePyObject_GC_NewVar
instead.Memory allocated by this function must be freed with
PyObject_Free()
(usually called via the object’stp_free
slot).Nota
The returned memory is not guaranteed to have been completely zeroed before it was initialized.
Nota
This macro does not construct a fully initialized object of the given type; it merely allocates memory and prepares it for further initialization by
tp_init
. To construct a fully initialized object, call typeobj instead. For example:PyObject *list_instance = PyObject_CallNoArgs((PyObject *)&PyList_Type);
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void PyObject_Del(void *op)¶
Same as
PyObject_Free()
.
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PyObject _Py_NoneStruct¶
Objeto que es visible en Python como
None
. Esto solo se debe acceder utilizando el macroPy_None
, que se evalúa como un puntero a este objeto.
Ver también
- Objetos módulo
Para asignar y crear módulos de extensión.