#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", 2)); 
    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 0;
}