#include <Python.h>//python33（python2.x有几个函数不对应）

/*

PyImport_ImportModule

导入一个Python模块并返回它的指针

PyModule_GetDict

获取一个模块的属性字典对象

PyRun_String

在指定的名字空间内运行代码串

PyObject_SetAttrString

通过namestring为一个对象的属性赋值

PyArg_Parse

将Python返回值对象转换为C语言形式

PyObject_GetAttrString

按名字获取对象的属性值

PyEval_CallObject

调用Python的函数（或类，或方法）

PyArg_Parse

将Python对象转换为C语言值

Py_BuildValue

将C语言值转换为Python对象

PyDict_New

构造一个新的空字典对象

PyDict_SetItemString

给一个字典的键值赋值

PyDict_GetItemString

按键值获取（查询）一个字典值

PyEval_GetBuiltins

得到内置作用域的模块

*/

/*******usermod.py********

message = 'The meaning of life...'

def transform(input):

    input = input.replace('life', 'Python')

    return input.upper()

*/

int main() {

    int *cval, i;

    char *cstr;

    PyObject *pstr, *pmod, *pdict, *pfunc, *pargs, *pval;

    Py_Initialize();

    pmod  = PyImport_ImportModule("usermod");

    pdict = PyModule_GetDict(pmod);

    pstr  = PyRun_String("message", Py_eval_input, pdict, pdict);

    PyArg_Parse(pstr, "s", &cstr);

    printf("%s\n", cstr);

    PyObject_SetAttrString(pmod, "X", pstr);

    (void) PyRun_String("print(transform(X))", Py_file_input, pdict, pdict);

    pstr = PyObject_GetAttrString(pmod, "message");

    PyArg_Parse(pstr, "s", &cstr);

    printf("%s\n", cstr);

    Py_DECREF(pstr);

    pfunc = PyObject_GetAttrString(pmod, "transform");

    pargs = Py_BuildValue("(s)", cstr);

    pstr  = PyEval_CallObject(pfunc, pargs);

    PyArg_Parse(pstr, "s", &cstr);

    printf("%s\n", cstr);

    pdict = PyDict_New();

    PyDict_SetItemString(pdict, "__builtins__", PyEval_GetBuiltins( ));

    PyDict_SetItemString(pdict, "Y", Py_BuildValue("l", ));

    PyRun_String("X = 99",  Py_file_input, pdict, pdict);

    PyRun_String("X = X+Y", Py_file_input, pdict, pdict);

    pval = PyDict_GetItemString(pdict, "X");

    PyArg_Parse(pval, "i", &cval);

    printf("%d\n", cval);

    Py_DECREF(pdict);

    Py_DECREF(pmod);

    Py_DECREF(pstr);

    Py_DECREF(pfunc);

    Py_DECREF(pargs); 

    Py_Finalize();

    return ;

}