python C API 迭代器

#include <stdio.h>
#include "python3.5m/Python.h"
int main(int argc, char* argv[]){
    long v;
    Py_Initialize();
    PyObject *t, *item;
    t = PyList_New(3);
    PyList_SetItem(t, 0, PyLong_FromLong(1L));
    PyList_SetItem(t, 1, PyLong_FromLong(2L));
    PyList_SetItem(t, 2, PyLong_FromLong(3L));
    PyObject *iterator = PyObject_GetIter(t);
    if (iterator == NULL){
        printf("error\n");
    }
    while (item = PyIter_Next(iterator)){
       v = PyLong_AsLong(item);
       printf("%ld\n", v);
       Py_DECREF(item);
    }
    Py_DECREF(iterator);
    Py_Finalize();
    return 0;
}

output:
1
2
3

---

/*返回迭代器对象*/
PyObject* PyObject_GetIter(PyObject *o)

/*获取迭代器o的下 一个值*/
PyObject* PyIter_Next(PyObject *o)

/*将python对象转换为c long*/
long PyLong_AsLong(PyObject *pylong)