Executing script with embedded python

[Andrew Ayre]

Hi, I have a script that I want to execute from C. I don't want to call any
functions, just execute the script. Below is a code snippet.

The problem is that PyObject_CallOb ject always returns NULL. Is this the
correct return value for simply executing a script, as there is no function
return value involved?

// load script
pname = PyString_FromSt ring(SCRIPTFILE NAME);
pmodule = PyImport_Import (pname);
Py_DECREF(pname );

if (pmodule != NULL)
{
// execute script
presult = PyObject_CallOb ject(pmodule, NULL);
if (presult == NULL)
{
Py_DECREF(pmodu le);
return;
}
Py_DECREF(presu lt);
Py_DECREF(pmodu le);
}
else
{
return;
}


regards, Andy
andy@britishide as1965.com (remove year to reply)

[Farshid Lashkari]

Re: Executing script with embedded python

> The problem is that PyObject_CallOb ject always returns NULL. Is this the[color=blue]
> correct return value for simply executing a script, as there is no function
> return value involved?[/color]

The documentation for PyObject_CallOb ject states the following:

"Returns the result of the call on success, or NULL on failure".

So it seems like the call is failing. My guess would be that modules are
not callable objects. Also, this seems somewhat redundant since your
module is effectively executed when you import it using the
PyImport_Import function.

-Farshid

[Andrew Ayre]

Re: Executing script with embedded python


"Farshid Lashkari" <flashkNO@SPAMg mail.com> wrote in message
news:cE_Bf.1132 9$ZA5.11001@fed 1read05...[color=blue][color=green]
> > The problem is that PyObject_CallOb ject always returns NULL. Is this the
> > correct return value for simply executing a script, as there is no[/color][/color]
function[color=blue][color=green]
> > return value involved?[/color]
>
> The documentation for PyObject_CallOb ject states the following:
>
> "Returns the result of the call on success, or NULL on failure".
>
> So it seems like the call is failing. My guess would be that modules are
> not callable objects. Also, this seems somewhat redundant since your
> module is effectively executed when you import it using the
> PyImport_Import function.
>
> -Farshid
>[/color]

Thanks for the reply. The script does execute and do what I want it to do,
without any problems. The only problem is that I get the NULL result. So I
think it is callable.

Andy

[Andrew Ayre]

Re: Executing script with embedded python


"Farshid Lashkari" <flashkNO@SPAMg mail.com> wrote in message
news:cE_Bf.1132 9$ZA5.11001@fed 1read05...[color=blue][color=green]
> > The problem is that PyObject_CallOb ject always returns NULL. Is this the
> > correct return value for simply executing a script, as there is no[/color][/color]
function[color=blue][color=green]
> > return value involved?[/color]
>
> The documentation for PyObject_CallOb ject states the following:
>
> "Returns the result of the call on success, or NULL on failure".
>
> So it seems like the call is failing. My guess would be that modules are
> not callable objects. Also, this seems somewhat redundant since your
> module is effectively executed when you import it using the
> PyImport_Import function.
>
> -Farshid
>[/color]

I redirected stderr to my application and it is reporting that "module" is
not callable. Pretty odd, considering it is executing the script anyway.
I'll look into this further. Thanks.

Andy

[Andrew Ayre]

Re: Executing script with embedded python


"Farshid Lashkari" <flashkNO@SPAMg mail.com> wrote in message
news:cE_Bf.1132 9$ZA5.11001@fed 1read05...[color=blue][color=green]
> > The problem is that PyObject_CallOb ject always returns NULL. Is this the
> > correct return value for simply executing a script, as there is no[/color][/color]
function[color=blue][color=green]
> > return value involved?[/color]
>
> The documentation for PyObject_CallOb ject states the following:
>
> "Returns the result of the call on success, or NULL on failure".
>
> So it seems like the call is failing. My guess would be that modules are
> not callable objects. Also, this seems somewhat redundant since your
> module is effectively executed when you import it using the
> PyImport_Import function.
>
> -Farshid
>[/color]

Yes, you were 100% correct. Thanks!

Andy