C++——引入python函数

 1、添加环境

#include<Python.h>

2、添加库路径

3、函数剖析

//初始化python解释器
void Py_Initialize(void);

//检查是否初始化成功
int Py_IsIntialized(void);

//导入python模块
PyObject* PyImport_ImportModule(char *name);

//执行Python代码
int PyRun_SimpleString(const char *command);

//构建参数列表， 把C类型转化成Python支持类型
PyObject* Py_BuildValue(char* format, ...)

//储存python导入的方法字典
PyModule_GetDict

//获取方法
PyObject* PyDict_GetItemString(PyObject*, const char*);

4、实例运用

 如下有一个temp.py（pyhon文件）

def hello(name):
    print("hello world, ", name)
    return 0

#include <Python.h>
void importPython()
{
    PyObject *pName = NULL;
    PyObject *pModule = NULL;
    PyObject *pFunc = NULL;
    PyObject *pDict = NULL;
    PyObject *pArgs = NULL;
    Py_Initialize();
    if(!Py_IsInitialized())
    {
	cout << "python initialized failed." << endl;
    }
    // 载入名为PyPlugin的脚本

    //添加路径为当前文件夹
    PyRun_SimpleString("import sys");  
    PyRun_SimpleString("sys.path.append('./')");  
    //导入python文件
    pModule = PyImport_ImportModule("getfiles");

    if (!pModule)
    {
	printf("can't getfiles.py\n");
    }
    pDict = PyModule_GetDict(pModule);
    if(!pDict)
    {
	cout << "can't pDict" << endl;
	system("pause");
	return;
    }
    pFunc = PyDict_GetItemString(pDict, "hello");
    if(!pFunc || !PyCallable_Check(pFunc))
    {
	cout << "can't findfunction run" << endl;
	system("pause");
	return;
    }
    char name[100] = "coco567";
    //将参数保存在容器内
    PyObject *list = PyList_New(0);
    pArgs = PyTuple_New(1);
    //s对应string类型
    PyList_Append(list, Py_BuildValue("s", name));
    PyTuple_SetItem(pArgs, 0, list);
    #调用
    PyObject *pRet = PyEval_CallObject(pFunc, pArgs);
    int ret = 0;
    if(pRet && PyArg_ParseTuple(pRet, "i", &ret))
    {
	printf("Function iter_reader call successful ret = %d\n", ret);
    }
    //垃圾回收
    if(pArgs)
	Py_DECREF(pArgs);
    if(pFunc)
	Py_DECREF(pFunc);
    //关闭解释器
    Py_Finalize();

}