37 lines
1.3 KiB
Cython
37 lines
1.3 KiB
Cython
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cdef extern from "Python.h":
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############################################################################
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# 6.5 Iterator Protocol
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############################################################################
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bint PyIter_Check(object o)
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# Return true if the object o supports the iterator protocol.
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object PyIter_Next(object o)
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# Return value: New reference.
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# Return the next value from the iteration o. If the object is an
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# iterator, this retrieves the next value from the iteration, and
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# returns NULL with no exception set if there are no remaining
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# items. If the object is not an iterator, TypeError is raised, or
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# if there is an error in retrieving the item, returns NULL and
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# passes along the exception.
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# To write a loop which iterates over an iterator, the C code should look something like this:
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# PyObject *iterator = PyObject_GetIter(obj);
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# PyObject *item;
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# if (iterator == NULL) {
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# /* propagate error */
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# }
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# while (item = PyIter_Next(iterator)) {
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# /* do something with item */
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# ...
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# /* release reference when done */
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# Py_DECREF(item);
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# }
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# Py_DECREF(iterator);
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# if (PyErr_Occurred()) {
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# /* propagate error */
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# }
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# else {
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# /* continue doing useful work */
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# }
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