How to pass a arg of object to python's script in a c++ program?

[zghelp]

/*I am sorry the prev post is a mistake...*/

//the c++ code

using namespace boost::python;

struct World
{
void set(std::string msg) { this->msg = msg; }
std::string greet() { return msg; }
std::string msg;
};

BOOST_PYTHON_MO DULE(hello)
{
class_<World>(" World")
.def("greet", &World::gree t)
.def("set", &World::set)
;
}

int _tmain(int argc, _TCHAR* argv[])
{
Py_Initialize() ;

if (!Py_IsInitiali zed())
return -1;

inithello();

PyRun_SimpleStr ing("import sys");
PyRun_SimpleStr ing("sys.path.a ppend('./')");

PyObject* pName,*pModule, *pDict,*pFunc,* pArgs;

pName = PyString_FromSt ring("pytest");
pModule = PyImport_Import (pName);
if (!pModule)
return -1;

pDict = PyModule_GetDic t(pModule);
if (!pDict)
return -1;

pFunc = PyDict_GetItemS tring(pDict,"ad d");
if (!pFunc || !PyCallable_Che ck(pFunc))
return -1;

World w;
w.set("hi from main!");

pArgs = PyTuple_New(3);
PyTuple_SetItem (pArgs,0,Py_Bui ldValue("i",3)) ;
PyTuple_SetItem (pArgs,1,Py_Bui ldValue("i",4)) ;
PyTuple_SetItem (pArgs,2,Py_Bui ldValue("O",&w) );

try
{
PyObject_CallOb ject(pFunc,pArg s);
}
catch(error_alr eady_set)
{
// handle the exception in some way
}

Py_DECREF(pName );
Py_DECREF(pArgs );
Py_DECREF(pModu le);

Py_Finalize();
getchar();

return 0;
}

//the python's script

import hello
from hello import *
def add(a,b,t):
print "a + b = " + str(a+b)
w = hello.World()
w.set("hi from script!")
print w.greet()
print t.greet()
return


but the exception occur when run to "print t.greet()"

How can I solve it?

[Mike Rovner]

Re: How to pass a arg of object to python's script in a c++ program?

Couple notes:
- boost.python issues better discuss in comp.lang.pytho n.c++ group;
- debug your extension from python first, then embed it
- don't call PyFinalize()

zghelp wrote:[color=blue]
> but the exception occur when run to "print t.greet()"
>
> How can I solve it?[/color]

Providing exception text will be helpful.

Mike