Protocole d'itération¶
Il existe deux fonctions dédiées à l'interaction avec les itérateurs.
-
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.Ajouté dans la version 3.10.
-
PyObject *PyIter_Next(PyObject *o)¶
- Valeur de retour : nouvelle référence. 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.
Pour écrire une boucle itérant un itérateur, le code C devrait ressembler à :
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()
.Ajouté dans la version 3.10.
-
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
.
Ajouté dans la version 3.10.