python的开发效率之高是毋庸置疑的，C++/C的语言性能之快也是让人羡慕的。这一次，鱼和熊掌是可以兼得的 ：），混合编程，使得我们可以取之所长，游走在C与python之间。很多游戏开发中使用python来实现战斗脚本。
下面是script.py的内容
#!/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++调用Script.py
#include <python2.7/Python.h>
#include <iostream>
#include <string>
int main () {
//使用python之前，要调用Py_Initialize();这个函数进行初始化
Py_Initialize();
PyRun_SimpleString("import sys");
PyRun_SimpleString("sys.path.append('./')");
PyObject * pModule = NULL;
PyObject * pFunc = NULL;
PyObject * pClass = NULL;
PyObject * pInstance = NULL;
//这里是要调用的文件名
pModule = PyImport_ImportModule("script");
//这里是要调用的函数名
pFunc= PyObject_GetAttrString(pModule, "hello");
//调用函数
PyEval_CallObject(pFunc, NULL);
Py_DECREF(pFunc);
pFunc = PyObject_GetAttrString(pModule, "world");
PyObject_CallFunction(pFunc, "s", "zhengji");
Py_DECREF(pFunc);
//测试调用python的类
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);
//调用Py_Finalize，这个根Py_Initialize相对应的。
Py_Finalize();
return 0;
}
编译C++代码
g++ zj.cpp -o zj -lpython2.7
输出结果
zj@hp:~/tmp/CcalPy$ ./zj
Hello World
name
my family
