代码如下，分别演示直接执行python语句、无返回无参数函数调用、返回单参数函数调用。返回多参数函数调用：
#include <Python.h>
#include <iostream>
using namespace std;
//执行python命令
void ExecPythomand()
{
//直接执行
PyRun_SimpleString("from time import time,ctime\n"
"print 'Today is',ctime(time())\n");
}
//调用无参数函数
void InvokeNoParm()
{
PyObject* pMod = NULL;
PyObject* pFunc = NULL;
//导入模块
pMod = PyImport_ImportModule("Life");
if(pMod)
{
//获取函数地址
pFunc = PyObject_GetAttrString(pMod, "a");
if(pFunc)
{
//函数调用
PyEval_CallObject(pFunc, NULL);
}
else
{
cout << "cannot find function a" << endl;
}
}
else
{
cout << "cannot find Life.py" << endl;
}
} //调用一参数函数
void InvokeWith2Parm()
{
PyObject* pMod = NULL;
PyObject* pFunc = NULL;
PyObject* pParm = NULL;
PyObject* pRetVal = NULL;
int iRetVal = 0;
//导入模块
pMod = PyImport_ImportModule("FuncDef");
if(pMod)
{
pFunc = PyObject_GetAttrString(pMod, "square");
if(pFunc)
{
//创建参数
pParm = Py_BuildValue("(i)", 5);
//函数调用
pRetVal = PyEval_CallObject(pFunc, pParm);
//解析返回值
PyArg_Parse(pRetVal, "i", &iRetVal);
cout << "square 5 is: " << iRetVal << endl;
}
else
{
cout << "cannot find function square" << endl;
}
}
else
{
cout << "cannot find FuncDef.py" << endl;
}
}//调用多参数函数
void InvokeWith3Parm()
{
PyObject* pMod = NULL;
PyObject* pFunc = NULL;
PyObject* pParm = NULL;
PyObject* pRetVal = NULL;
int iRetVal = 0;
//导入模块
pMod = PyImport_ImportModule("add");
if(pMod)
{
pFunc = PyObject_GetAttrString(pMod, "add");
if(pFunc)
{
//创建两个参数
pParm = PyTuple_New(2);
//为参数赋值
PyTuple_SetItem(pParm, 0, Py_BuildValue("i",2000));
PyTuple_SetItem(pParm, 1, Py_BuildValue("i",3000));
//函数调用
pRetVal = PyEval_CallObject(pFunc, pParm);
//解析返回值
PyArg_Parse(pRetVal, "i", &iRetVal);
cout << "2000 + 3000 = " << iRetVal << endl;
}
else
{
cout << "cannot find function square" << endl;
}
}
else
{
cout << "cannot find add.py" << endl;
}
} int main(int argc, char* argv[])
{
Py_Initialize(); //python 解释器的初始化
ExecPythomand();
InvokeNoParm();
InvokeWith2Parm();
InvokeWith3Parm();
Py_Finalize(); // 垃圾回收、清除导入库
return 0;
}
