# 함수 객체

파이썬 함수와 관련된 몇 가지 함수가 있습니다.

type PyFunctionObject

  함수에 사용되는 C 구조체.

PyTypeObject PyFunction_Type

  이것은 `PyTypeObject`의 인스턴스이며 파이썬 함수 형을 나타냅니다. 파이썬 프로그래머에게 `types.FunctionType`으로 노출됩니다.

int PyFunction_Check(PyObject *o)

  o가 함수 객체(`PyFunction_Type` 형)면 참을 반환합니다. 매개 변수는 `NULL`이 아니어야 합니다. 이 함수는 항상 성공합니다.

PyObject *PyFunction_New(PyObject *code, PyObject *globals)
  Return value: New reference.

  코드 객체 code와 연관된 새 함수 객체를 반환합니다. globals는 함수에서 액세스할 수 있는 전역 변수가 있는 딕셔너리이어야 합니다.

  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.

  Added in version 3.3.

PyObject *PyFunction_GetCode(PyObject *op)
  Return value: Borrowed reference.

  함수 객체 op와 연관된 코드 객체를 반환합니다.

PyObject *PyFunction_GetGlobals(PyObject *op)
  Return value: Borrowed reference.

  함수 객체 op와 연관된 전역 딕셔너리를 반환합니다.

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.

  함수 객체 op의 인자 기본값을 반환합니다. 이는 인자의 튜플이나 `NULL`일 수 있습니다.

int PyFunction_SetDefaults(PyObject *op, PyObject *defaults)

  함수 객체 op의 인자 기본값을 설정합니다. defaults는 `Py_None` 이나 튜플이어야 합니다.

  실패하면 `SystemError`를 발생시키고 `-1`을 반환합니다.

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!

  Added in version 3.12.

PyObject *PyFunction_GetClosure(PyObject *op)
  Return value: Borrowed reference.

  함수 객체 op와 연관된 클로저를 반환합니다. 이것은 `NULL` 이나 셀 객체의 튜플일 수 있습니다.

int PyFunction_SetClosure(PyObject *op, PyObject *closure)

  함수 객체 op와 연관된 클로저를 설정합니다. closure는 `Py_None` 이나 셀 객체의 튜플이어야 합니다.

  실패하면 `SystemError`를 발생시키고 `-1`을 반환합니다.

PyObject *PyFunction_GetAnnotations(PyObject *op)
  Return value: Borrowed reference.

  함수 객체 op의 어노테이션을 반환합니다. 이것은 가변 딕셔너리나 `NULL` 일 수 있습니다.

int PyFunction_SetAnnotations(PyObject *op, PyObject *annotations)

  함수 객체 op의 어노테이션을 설정합니다. annotations은 딕셔너리나 `Py_None` 이어야 합니다.

  실패하면 `SystemError`를 발생시키고 `-1`을 반환합니다.

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.

  Added in version 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.)

  Added in version 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`

  Added in version 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.

  Added in version 3.12.