이터레이터 프로토콜¶
특히 이터레이터를 사용하기 위한 두 함수가 있습니다.
-
int PyIter_Check(PyObject *o)¶
- Part of the Stable ABI since version 3.8.
Return non-zero if the object o can be safely passed to
PyIter_Next()
, and0
otherwise. This function always succeeds.
-
int PyAIter_Check(PyObject *o)¶
- Part of the Stable ABI since version 3.10.
Return non-zero if the object o provides the
AsyncIterator
protocol, and0
otherwise. This function always succeeds.버전 3.10에 추가.
-
PyObject *PyIter_Next(PyObject *o)¶
- Return value: New reference. Part of the Stable ABI.
Return the next value from the iterator o. The object must be an iterator according to
PyIter_Check()
(it is up to the caller to check this). If there are no remaining values, returnsNULL
with no exception set. If an error occurs while retrieving the item, returnsNULL
and passes along the exception.
이터레이터를 이터레이트하는 루프를 작성하려면, C 코드는 이런 식으로 되어야 합니다:
PyObject *iterator = PyObject_GetIter(obj);
PyObject *item;
if (iterator == NULL) {
/* propagate error */
}
while ((item = PyIter_Next(iterator))) {
/* do something with item */
...
/* release reference when done */
Py_DECREF(item);
}
Py_DECREF(iterator);
if (PyErr_Occurred()) {
/* propagate error */
}
else {
/* continue doing useful work */
}
-
type PySendResult¶
The enum value used to represent different results of
PyIter_Send()
.버전 3.10에 추가.
-
PySendResult PyIter_Send(PyObject *iter, PyObject *arg, PyObject **presult)¶
- Part of the Stable ABI since version 3.10.
Sends the arg value into the iterator iter. Returns:
PYGEN_RETURN
if iterator returns. Return value is returned via presult.PYGEN_NEXT
if iterator yields. Yielded value is returned via presult.PYGEN_ERROR
if iterator has raised and exception. presult is set toNULL
.
버전 3.10에 추가.