python的開發(fā)效率之高是毋庸置疑的，C++/C的語言性能之快也是讓人羨慕的。這一次，魚和熊掌是可以兼得的 ：），混合編程，使得我們可以取之所長，游走在C與python之間。很多游戲開發(fā)中使用python來實現(xiàn)戰(zhàn)斗腳本。

下面是script.py的內(nèi)容

#!/usr/bin/python
# Filename: script.py
class Student:
    def SetName(self,name):
        self._name = name
    def PrintName(self):
        print self._name
def hello():
    print "Hello World\n"
def world(name):
    print "name"

C++調(diào)用Script.py

#include <python2.7/Python.h>
#include <iostream>
#include <string>

int main () {

    //使用python之前，要調(diào)用Py_Initialize();這個函數(shù)進行初始化
    Py_Initialize();

    PyRun_SimpleString("import sys");
    PyRun_SimpleString("sys.path.append('./')");

    PyObject * pModule = NULL;
    PyObject * pFunc = NULL;
    PyObject * pClass = NULL;
    PyObject * pInstance = NULL;

    //這里是要調(diào)用的文件名
    pModule = PyImport_ImportModule("script");
    //這里是要調(diào)用的函數(shù)名
    pFunc= PyObject_GetAttrString(pModule, "hello");
    //調(diào)用函數(shù)
    PyEval_CallObject(pFunc, NULL);
    Py_DECREF(pFunc);  

    pFunc = PyObject_GetAttrString(pModule, "world");
    PyObject_CallFunction(pFunc, "s", "zhengji");
    Py_DECREF(pFunc);  

    //測試調(diào)用python的類
    pClass = PyObject_GetAttrString(pModule, "Student");
    if (!pClass) {
        printf("Can't find Student class.\n");
        return -1;
    }
    pInstance = PyInstance_New(pClass, NULL, NULL);
    if (!pInstance) {
        printf("Can't create Student instance.\n");
        return -1;
    }
    PyObject_CallMethod(pInstance, "SetName", "s","my family");
    PyObject_CallMethod(pInstance, "PrintName",NULL,NULL);
    //調(diào)用Py_Finalize，這個根Py_Initialize相對應的。
    Py_Finalize();
    return 0;
}

編譯C++代碼

 g++ zj.cpp -o zj -lpython2.7 

輸出結(jié)果

zj@hp:~/tmp/CcalPy$ ./zj
Hello World
name
my family