# Allouer des objets dans le tas

PyObject *_PyObject_New(PyTypeObject *type)
  Valeur de retour : nouvelle référence.

PyVarObject *_PyObject_NewVar(PyTypeObject *type, Py_ssize_t size)
  Valeur de retour : nouvelle référence.

PyObject *PyObject_Init(PyObject *op, PyTypeObject *type)
  Valeur de retour : référence empruntée. Fait partie de l' ABI stable.

  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 implementing `tp_alloc` for your type, prefer `PyType_GenericAlloc()` or `PyObject_New()`.

  Note

  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)
  Valeur de retour : référence empruntée. Fait partie de l' ABI stable.

  Effectue les mêmes opérations que `PyObject_Init()` fait, et initialise également l'information de la longueur pour un objet de taille variable.

  Note

  This function only initializes some of the object's memory. It does not zero the rest.

PyObject_New(TYPE, typeobj)

  Allocates a new Python object using the C structure type TYPE and the Python type object typeobj (`PyTypeObject*`) by calling `PyObject_Malloc()` to allocate memory and initializing it like `PyObject_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__()`), or `tp_init` (`__init__()`).

  This cannot be used for objects with `Py_TPFLAGS_HAVE_GC` set in `tp_flags`; use `PyObject_GC_New` instead.

  Memory allocated by this macro must be freed with `PyObject_Free()` (usually called via the object's `tp_free` slot).

  Note

  The returned memory is not guaranteed to have been completely zeroed before it was initialized.

  Note

  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);

  Voir aussi

  - `PyObject_Free()`

  - `PyObject_GC_New`

  - `PyType_GenericAlloc()`

  - `tp_alloc`

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 the `tp_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 in `tp_flags`; use `PyObject_GC_NewVar` instead.

  Memory allocated by this function must be freed with `PyObject_Free()` (usually called via the object's `tp_free` slot).

  Note

  The returned memory is not guaranteed to have been completely zeroed before it was initialized.

  Note

  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);

  Voir aussi

  - `PyObject_Free()`

  - `PyObject_GC_NewVar`

  - `PyType_GenericAlloc()`

  - `tp_alloc`

void PyObject_Del(void *op)

  Same as `PyObject_Free()`.

PyObject _Py_NoneStruct

  Objet qui est visible en tant que `None` dans Python. Ne devrait être accessible uniquement en utilisant la macro `Py_None`, qui évalue cet objet à un pointeur.

Voir aussi

Module Objects

  Allouer et créer des modules d'extension.