有人用过在c环境中通过PyObject* PyObject_CallMethod(PyObject *o, char *method,
char *format, ...)调用类的成员函数吗？
      我有个简单的类tank.py
      class tank:
            def __init__(self,x,y):
                 tank.x=x
                 tank.y=y

            def forward(self):
                 print 'forward'

      c环境下程序如下：

#include "python.h"

int main(int argc,char ** argv)
{
 PyObject *TankObject, *Tank_dict, * expression;
 Py_Initialize();
* TankObject* =
PyImport_AddModule("tank");


 //这个TankObject是什么？tank类的对象吗？还是文件对象？我该怎么获得tank类的对象？
 //是不是需要声明一个Python对象？？
 Tank_dict = PyModule_GetDict(TankObject);
 expression = PyDict_GetItemString(Tank_dict, "forward");
 PyObject_CallObject(expression, NULL);
 //PyObject_CallMethod(TankObject,"forward",NULL);
 Py_Finalize();
 return 0;
}
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具体没做过，但根据我对Python源码的理解，有一些可以提供你参考：
*TankObject* = PyImport_AddModule("tank");
用PyImport_AddModule只是创建了一个名为"tank"的module，并没有进行import动作，建议使用PyImport_ImportModule("tank")，这个会进行import动作

这个TankObject是一个PyModuleObject对象，对于这个对象，你可以这样理解它：
struct PyModuleObject
{
    PyDictObject* dict;
}
而对于PyDictObject对象，你可以这样理解：
struct PyDictObject
{
    map dict;
}

所以import之后内存中的结构如下：
["tank", PyModuleObject]---->["tank", class object]---->["forward", function
object]。
所以你的调用应该是这样的：
Tank_dict = PyModule_GetDict(TankObject);
class_object = PyDict_GetItemString(Tank_dict, "tank");
function_object = PyObject_GetAttrString(class_object, "forward")
PyObject_CallObject(function_object, NULL);

呵呵，没有测试过，你试试看吧 ：）


On 3/31/06, 吴俊玉 <wujunyu at gmail.com> wrote:
>
>        有人用过在c环境中通过PyObject* PyObject_CallMethod(PyObject *o, char *method,
> char *format, ...)调用类的成员函数吗？
>       我有个简单的类tank.py
>       class tank:
>             def __init__(self,x,y):
>                  tank.x=x
>                  tank.y=y
>
>             def forward(self):
>                  print 'forward'
>
>       c环境下程序如下：
>
> #include "python.h"
>
> int main(int argc,char ** argv)
> {
>  PyObject *TankObject, *Tank_dict, * expression;
>  Py_Initialize();
> * TankObject* =
> PyImport_AddModule("tank");
>
>
>  //这个TankObject是什么？tank类的对象吗？还是文件对象？我该怎么获得tank类的对象？
>  //是不是需要声明一个Python对象？？
>  Tank_dict = PyModule_GetDict(TankObject);
>  expression = PyDict_GetItemString(Tank_dict, "forward");
>  PyObject_CallObject(expression, NULL);
>  //PyObject_CallMethod(TankObject,"forward",NULL);
>  Py_Finalize();
>  return 0;
> }
>
>
> _______________________________________________
> python-chinese
> Post: send python-chinese at lists.python.cn
> Subscribe: send subscribe to python-chinese-request at lists.python.cn
> Unsubscribe: send unsubscribe to  python-chinese-request at lists.python.cn
> Detail Info: http://python.cn/mailman/listinfo/python-chinese
>
>


--
Robert
Python源码剖析――http://blog.donews.com/lemur/
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豁然开朗，至少对这一块理解有点清晰了
谢谢.
代码如下，不过仍然运行错误！
int main(int argc,char ** argv)
{
 Py_Initialize();
 PyObject *TankObject, *Tank_dict, *class_object,* function_object;
 TankObject = PyImport_ImportModule("MyTank");
 Tank_dict = PyModule_GetDict(TankObject);
 class_object = PyDict_GetItemString(Tank_dict, "tank");
 function_object = PyObject_GetAttrString(class_object, "forward");
 PyObject_CallMethod(class_object,"forward",NULL);
 Py_Finalize();
 return 0;
}
我跟进去调试发现
TankObject = PyImport_ImportModule("MyTank");
数据窗口显示：
 TankObject CXX0017: Error: symbol "TankObject" not found
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下面这个经过我测试了，可以运行：

int main()
{
 PyObject *TankModule = NULL;
 PyObject *TankDict = NULL;
 PyObject *TankClassObj = NULL;
 PyObject *ForwardFuncObj = NULL;
 PyObject *TankObject = NULL;
 Py_Initialize();
//import module
 TankModule = PyImport_ImportModule("MyTank");
//获得module中的维护的dict
 TankDict = PyModule_GetDict(TankModule);
//从dict中获得symbol "Tank" 对应的对象，是一个PyClassObject
 TankClassObj = PyDict_GetItemString(TankDict, "Tank");
//PyClassObject是callable的，创建PyClassObject对象的实例，这里即是OO中的class的实例化。TankObject是一个PyInstanceObject
 TankObject = PyObject_Call(TankClassObj, NULL, NULL);
//这个不用comment了吧 ：）
 PyObject_CallMethod(TankObject, "forward", NULL);
 Py_Finalize();
 return 0;
}


On 3/31/06, 吴俊玉 <wujunyu at gmail.com> wrote:
>
>  豁然开朗，至少对这一块理解有点清晰了
> 谢谢.
> 代码如下，不过仍然运行错误！
>  int main(int argc,char ** argv)
> {
>  Py_Initialize();
>  PyObject *TankObject, *Tank_dict, *class_object,* function_object;
>  TankObject = PyImport_ImportModule("MyTank");
>
>  Tank_dict = PyModule_GetDict(TankObject);
>  class_object = PyDict_GetItemString(Tank_dict, "tank");
>  function_object = PyObject_GetAttrString(class_object, "forward");
>  PyObject_CallMethod(class_object,"forward",NULL);
>  Py_Finalize();
>  return 0;
> }
> 我跟进去调试发现
> TankObject = PyImport_ImportModule("MyTank");
> 数据窗口显示：
>  TankObject CXX0017: Error: symbol "TankObject" not found
>
>
> _______________________________________________
> python-chinese
> Post: send python-chinese at lists.python.cn
> Subscribe: send subscribe to python-chinese-request at lists.python.cn
> Unsubscribe: send unsubscribe to  python-chinese-request at lists.python.cn
> Detail Info: http://python.cn/mailman/listinfo/python-chinese
>
>


--
Robert
Python源码剖析――http://blog.donews.com/lemur/
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代码已收到
非常感谢
先消化下，再不懂的时候再麻烦你了！
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