Objetos función

Hay algunas funciones específicas para las funciones de Python.

type PyFunctionObject

La estructura C utilizada para las funciones.

PyTypeObject PyFunction_Type

Esta es una instancia de PyTypeObject y representa el tipo función de Python. Está expuesto a los programadores de Python como types.FunctionType.

int PyFunction_Check(PyObject *o)

Retorna verdadero si o es un objeto función (tiene tipo PyFunction_Type). El parámetro no debe ser NULL. Esta función siempre finaliza con éxito.

PyObject *PyFunction_New(PyObject *code, PyObject *globals)

Return value: New reference.

Retorna un nuevo objeto función asociado con el objeto código code. globals debe ser un diccionario con las variables globales accesibles para la función.

The function’s docstring and name are retrieved from the code object. __module__ is retrieved from globals. The argument defaults, annotations and closure are set to NULL. __qualname__ is set to the same value as the code object’s co_qualname field.

PyObject *PyFunction_NewWithQualName(PyObject *code, PyObject *globals, PyObject *qualname)

Return value: New reference.

As PyFunction_New(), but also allows setting the function object’s __qualname__ attribute. qualname should be a unicode object or NULL; if NULL, the __qualname__ attribute is set to the same value as the code object’s co_qualname field.

Nuevo en la versión 3.3.

PyObject *PyFunction_GetCode(PyObject *op)

Return value: Borrowed reference.

Retorna el objeto código asociado con el objeto función op.

PyObject *PyFunction_GetGlobals(PyObject *op)

Return value: Borrowed reference.

Retorna el diccionario global asociado con el objeto función op.

PyObject *PyFunction_GetModule(PyObject *op)

Return value: Borrowed reference.

Return a borrowed reference to the __module__ attribute of the function object op. It can be NULL.

This is normally a string containing the module name, but can be set to any other object by Python code.

PyObject *PyFunction_GetDefaults(PyObject *op)

Return value: Borrowed reference.

Retorna los valores predeterminados del argumento del objeto función op. Esto puede ser una tupla de argumentos o NULL.

int PyFunction_SetDefaults(PyObject *op, PyObject *defaults)

Establece los valores predeterminados del argumento para el objeto función op. defaults deben ser Py_None o una tupla.

Lanza SystemError y retorna -1 en caso de error.

void PyFunction_SetVectorcall(PyFunctionObject *func, vectorcallfunc vectorcall)

Set the vectorcall field of a given function object func.

Warning: extensions using this API must preserve the behavior of the unaltered (default) vectorcall function!

Nuevo en la versión 3.12.

PyObject *PyFunction_GetClosure(PyObject *op)

Return value: Borrowed reference.

Retorna el cierre asociado con el objeto función op. Esto puede ser NULL o una tupla de objetos celda.

int PyFunction_SetClosure(PyObject *op, PyObject *closure)

Establece el cierre asociado con el objeto función op. cierre debe ser Py_None o una tupla de objetos celda.

Lanza SystemError y retorna -1 en caso de error.

PyObject *PyFunction_GetAnnotations(PyObject *op)

Return value: Borrowed reference.

Retorna las anotaciones del objeto función op. Este puede ser un diccionario mutable o NULL.

int PyFunction_SetAnnotations(PyObject *op, PyObject *annotations)

Establece las anotaciones para el objeto función op. annotations debe ser un diccionario o Py_None.

Lanza SystemError y retorna -1 en caso de error.

int PyFunction_AddWatcher(PyFunction_WatchCallback callback)

Register callback as a function watcher for the current interpreter. Return an ID which may be passed to PyFunction_ClearWatcher(). In case of error (e.g. no more watcher IDs available), return -1 and set an exception.

Nuevo en la versión 3.12.

int PyFunction_ClearWatcher(int watcher_id)

Clear watcher identified by watcher_id previously returned from PyFunction_AddWatcher() for the current interpreter. Return 0 on success, or -1 and set an exception on error (e.g. if the given watcher_id was never registered.)

Nuevo en la versión 3.12.

type PyFunction_WatchEvent

Enumeration of possible function watcher events: - PyFunction_EVENT_CREATE - PyFunction_EVENT_DESTROY - PyFunction_EVENT_MODIFY_CODE - PyFunction_EVENT_MODIFY_DEFAULTS - PyFunction_EVENT_MODIFY_KWDEFAULTS

Nuevo en la versión 3.12.

typedef int (*PyFunction_WatchCallback)(PyFunction_WatchEvent event, PyFunctionObject *func, PyObject *new_value)

Type of a function watcher callback function.

If event is PyFunction_EVENT_CREATE or PyFunction_EVENT_DESTROY then new_value will be NULL. Otherwise, new_value will hold a borrowed reference to the new value that is about to be stored in func for the attribute that is being modified.

The callback may inspect but must not modify func; doing so could have unpredictable effects, including infinite recursion.

If event is PyFunction_EVENT_CREATE, then the callback is invoked after func has been fully initialized. Otherwise, the callback is invoked before the modification to func takes place, so the prior state of func can be inspected. The runtime is permitted to optimize away the creation of function objects when possible. In such cases no event will be emitted. Although this creates the possibility of an observable difference of runtime behavior depending on optimization decisions, it does not change the semantics of the Python code being executed.

If event is PyFunction_EVENT_DESTROY, Taking a reference in the callback to the about-to-be-destroyed function will resurrect it, preventing it from being freed at this time. When the resurrected object is destroyed later, any watcher callbacks active at that time will be called again.

If the callback sets an exception, it must return -1; this exception will be printed as an unraisable exception using PyErr_WriteUnraisable(). Otherwise it should return 0.

There may already be a pending exception set on entry to the callback. In this case, the callback should return 0 with the same exception still set. This means the callback may not call any other API that can set an exception unless it saves and clears the exception state first, and restores it before returning.

Nuevo en la versión 3.12.