C++调用 python 函数及返回值的处理【元组，字符串...】

http://www.cnblogs.com/DxSoft/archive/2011/04/01/2002676.html

Python 脚本  py_test.py ：

#coding:utf-8

def get_int( ):
    a = 10
    b = 20
    return a + b

def get_str( s1, s2 ):
    #return s1 + s2
	#return 'Hello , TY'
	return ('Hello, World', 10, 20)

C 函数：

#include 
#include 
#include 

#pragma comment(lib, "python27_d.lib")

int main()
{
	PyObject *pName, *pModule, *pDict, *pFunc, *pArgs, *pRetVal;

	Py_Initialize();
	
	if (!Py_IsInitialized())
		return -1;

	//load py script filename
	PyRun_SimpleString("import sys");
	PyRun_SimpleString("sys.path.append('./')");

	pName = PyString_FromString("py_test");// py_test.py
	pModule = PyImport_Import(pName);
	if (!pModule){
		printf("cant find py_test.py");
		getchar();
		return -1;
	}
	pDict = PyModule_GetDict(pModule);
	if (!pDict) return -1;

	//find function name
	pFunc = PyDict_GetItemString(pDict, "get_str");
	if (!pFunc || !PyCallable_Check(pFunc)){
		printf("cant find function [add]");
		getchar();
		return -1;
	}

	//push args to stack
	pArgs = PyTuple_New(2);
	PyTuple_SetItem(pArgs, 0, Py_BuildValue("s", "Hello, "));
	PyTuple_SetItem(pArgs, 1, Py_BuildValue("s", "C_Python"));

	//call python function
	pRetVal = PyObject_CallObject(pFunc, pArgs);
	if (pRetVal == NULL){
		printf("CalllObject return NULL");
		return -1;
	}

	char* ret_str;
	int w = 0 , h = 0;
	//解析元组
	PyArg_ParseTuple(pRetVal, "s,i,i",&ret_str, &w, &h);
	
	printf("%s, %d, %d\n", ret_str, w, h);

	//解析字符串
	//printf("function return value:%s\r\n", PyString_AsString(pRetVal));

	Py_DECREF(pName);
	Py_DECREF(pArgs);
	Py_DECREF(pModule);
	Py_DECREF(pRetVal);
	//close python
	Py_Finalize();
	getchar();
	return 0;
}