C wrapper

[Sheldon]

Hi,

Can anyone give me some idea as to what this error means?

"ImportErro r: dynamic module does not define init function "

I am new at this and there is still a lot to learn.

Any help is appreciated,

/Sheldon

[Farshid Lashkari]

Re: C wrapper

Sheldon wrote:

Can anyone give me some idea as to what this error means?
>
"ImportErro r: dynamic module does not define init function "
>
I am new at this and there is still a lot to learn.
>
Any help is appreciated,

Take a look at the documentation for creating extension modules,
especially the following page:

http://docs.python.org/ext/methodTable.html

"The initialization function must be named initname(), where name is the
name of the module, and should be the only non-static item defined in
the module file"

-Farshid

[Sheldon]

Re: C wrapper


Farshid Lashkari skrev:

Sheldon wrote:

Can anyone give me some idea as to what this error means?

"ImportErro r: dynamic module does not define init function "

I am new at this and there is still a lot to learn.

Any help is appreciated,

>
Take a look at the documentation for creating extension modules,
especially the following page:
>

http://docs.python.org/ext/methodTable.html

>
"The initialization function must be named initname(), where name is the
name of the module, and should be the only non-static item defined in
the module file"
>
-Farshid

This function is there and is called init_mymodule() but I have other
functions that are not static.
Could this be the cause?

/Sheldon

[Robert Kern]

Re: C wrapper

Sheldon wrote:

This function is there and is called init_mymodule() but I have other
functions that are not static.

Is the module's name "_mymodule" ? Or is it "mymodule"?

--
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
that is made terrible by our own mad attempt to interpret it as though it had
an underlying truth."
-- Umberto Eco

[Sheldon]

Re: C wrapper


Robert Kern skrev:

Sheldon wrote:
>

This function is there and is called init_mymodule() but I have other
functions that are not static.

>
Is the module's name "_mymodule" ? Or is it "mymodule"?
>
--
Robert Kern
>
"I have come to believe that the whole world is an enigma, a harmless enigma
that is made terrible by our own mad attempt to interpret it as though it had
an underlying truth."
-- Umberto Eco

Here is the file/module name: _msgpps_functio ns.c
Here is the initfunction:

PyMODINIT_FUNC init_msgpps_fun ctions(void) {
PyObject* m;
m=Py_InitModule ("_msgpps_funct ions",_msgpps_f unctionsMethods );
ErrorObject = PyString_FromSt ring("_msgpps_f unctions.error" );
if(ErrorObject == NULL || \
PyDict_SetItemS tring(PyModule_ GetDict(m),"err or",ErrorObject )!=0)
{
Py_FatalError(" Can't define _msgpps_functio ns.error");
import_array();
} /* access to Numeric PyArray functions */
}


I have not main() function in the file. Instead the main function is
called the same name:

static PyObject* _msgpps_functio ns(PyObject* self, PyObject* args)

Now I am new at this and I have been reading anything I can find. The
only thing that is out of place is the part which I didn't include:

/* Initialize the Python interpreter. Required. */
Py_Initialize() ;

/* Add a static module */
initspam();
because I still don't understand this part.

/sheldon

[Gabriel Genellina]

Re: C wrapper

At Tuesday 7/11/2006 17:10, Sheldon wrote:

Take a look at the documentation for creating extension modules,
especially the following page:

http://docs.python.org/ext/methodTable.html

"The initialization function must be named initname(), where name is the
name of the module, and should be the only non-static item defined in
the module file"

-Farshid

>
>This function is there and is called init_mymodule() but I have other
>functions that are not static.
>Could this be the cause?

For a module called foo.c the initialization function must be called
initfoo (*not* init_foo)
And what are those non-static functions used for? The *only* purpose
of your module should be to provide the Python bindings...


--
Gabriel Genellina
Softlab SRL

_______________ _______________ _______________ _____
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[Sheldon]

Re: C wrapper


Hi,

For a module called foo.c the initialization function must be called
initfoo (*not* init_foo)

Ok, I fixed this part. Thanks

And what are those non-static functions used for? The *only* purpose
of your module should be to provide the Python bindings...

I wrote the C module to do some number crunching. Now I just need to
"connect" it to my python program. Should the initmsgpps_func tions() be
the only function in the file? Then how do I "connect" my C module to
my Python program?

/Sheldon

[Gabriel Genellina]

Re: C wrapper

At Tuesday 7/11/2006 17:27, Sheldon wrote:

>Here is the file/module name: _msgpps_functio ns.c
>Here is the initfunction:
>
>PyMODINIT_FU NC init_msgpps_fun ctions(void) {
PyObject* m;
m=Py_InitModule ("_msgpps_funct ions",_msgpps_f unctionsMethods );
ErrorObject = PyString_FromSt ring("_msgpps_f unctions.error" );
if(ErrorObject == NULL || \
PyDict_SetItemS tring(PyModule_ GetDict(m),"err or",ErrorObject )!=0)
>{
Py_FatalError(" Can't define _msgpps_functio ns.error");
import_array();
} /* access to Numeric PyArray functions */
>}
>
>
>I have not main() function in the file. Instead the main function is
>called the same name:
>
>static PyObject* _msgpps_functio ns(PyObject* self, PyObject* args)
>
>Now I am new at this and I have been reading anything I can find. The
>only thing that is out of place is the part which I didn't include:
>
/* Initialize the Python interpreter. Required. */
Py_Initialize() ;
>
/* Add a static module */
initspam();
>because I still don't understand this part.

Are you *extending* Python with a new module written in C (you should
be using the first part),
or *embedding* python inside your application, mainly written in C
(you would use something like the last code).


--
Gabriel Genellina
Softlab SRL

_______________ _______________ _______________ _____
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ¡gratis!
¡Abrí tu cuenta ya! - http://correo.yahoo.com.ar

[Sheldon]

Re: C wrapper


Gabriel Genellina skrev:

At Tuesday 7/11/2006 17:27, Sheldon wrote:
>

Here is the file/module name: _msgpps_functio ns.c
Here is the initfunction:

PyMODINIT_FUNC init_msgpps_fun ctions(void) {
PyObject* m;
m=Py_InitModule ("_msgpps_funct ions",_msgpps_f unctionsMethods );
ErrorObject = PyString_FromSt ring("_msgpps_f unctions.error" );
if(ErrorObject == NULL || \
PyDict_SetItemS tring(PyModule_ GetDict(m),"err or",ErrorObject )!=0)
{
Py_FatalError(" Can't define _msgpps_functio ns.error");
import_array();
} /* access to Numeric PyArray functions */
}


I have not main() function in the file. Instead the main function is
called the same name:

static PyObject* _msgpps_functio ns(PyObject* self, PyObject* args)

Now I am new at this and I have been reading anything I can find. The
only thing that is out of place is the part which I didn't include:

/* Initialize the Python interpreter. Required. */
Py_Initialize() ;

/* Add a static module */
initspam();
because I still don't understand this part.

>
Are you *extending* Python with a new module written in C (you should
be using the first part),
or *embedding* python inside your application, mainly written in C
(you would use something like the last code).
>
>
--
Gabriel Genellina
Softlab SRL
>
_______________ _______________ _______________ _____
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ¡gratis!
¡Abrí tu cuenta ya! - http://correo.yahoo.com.ar

Ok,

This I have done but still, the same error message. :(

[Gabriel Genellina]

Re: C wrapper

At Tuesday 7/11/2006 17:43, Sheldon wrote:

And what are those non-static functions used for? The *only* purpose
of your module should be to provide the Python bindings...

>
>I wrote the C module to do some number crunching. Now I just need to
>"connect" it to my python program. Should the initmsgpps_func tions() be
>the only function in the file? Then how do I "connect" my C module to
>my Python program?

Read again the docs but have in mind that you are *extending* the
interpreter with a new module - disregard the references to
*embedding* Python (even if they appear in a section about
extending!). I can see your confusion reading

http://docs.python.org/ext/methodTable.html

That is, you *don't* write a main() function, and you *don't* invoke
Py_Initialize; just write your initXXX() function.


--
Gabriel Genellina
Softlab SRL

_______________ _______________ _______________ _____
Correo Yahoo!
Espacio para todos tus mensajes, antivirus y antispam ¡gratis!
¡Abrí tu cuenta ya! - http://correo.yahoo.com.ar