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Revision 632c1cb57176d268d65a9fd7b00582f32e0884ee authored by Miss Islington (bot) on 25 February 2018, 17:10:58 UTC, committed by GitHub on 25 February 2018, 17:10:58 UTC
* Support sendfile on Windows Proactor event loop naively. (cherry picked from commit a19fb3c6aaa7632410d1d9dcb395d7101d124da4) Co-authored-by: Andrew Svetlov <andrew.svetlov@gmail.com>
1 parent b6b6669
iter.rst
.. highlightlang:: c
.. _iterator:
Iterator Protocol
=================
There are two functions specifically for working with iterators.
.. c:function:: int PyIter_Check(PyObject *o)
Return true if the object *o* supports the iterator protocol.
.. c:function:: PyObject* PyIter_Next(PyObject *o)
Return the next value from the iteration *o*. The object must be an iterator
(it is up to the caller to check this). If there are no remaining values,
returns *NULL* with no exception set. If an error occurs while retrieving
the item, returns *NULL* and passes along the exception.
To write a loop which iterates over an iterator, the C code should look
something like this::
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 */
}
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