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Re: Embedded Python and C Callback functions

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doc.mefisto@gmail.com writes:

> Hi. I'm a newbie in python. But I want embed it in my C program.
>
> There is such method of my class:
> @staticmethod
> def install_instr_callback(callback):
>     # set hook for every change of PC
>     m68k.set_instr_hook_callback(callback)
>
> And in my C code there is such callback function:
> static PyObject *my_instr_callback(PyObject *self);
>
> I want call install_instr_callback from C with specifying of my callback. I do:
> PyObject_CallMethod(myClass, "install_instr_callback", "(O)", my_instr_callback);
> But python writes me: [b]null argument to internal routine[/b].

If this output really comes from "PyObject_CallMethod", then
some passed in argument is likely "null" - maybe "myclass"?

The Python-C interface is complicated. It might be advicible to
use e.g. "cython" to get the boilder plate code and some intricacies
taken care of. I have done this with "dm.xmlsec.binding". You
can find in its source also an example for the callback defined
in Python and called from "C".

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Embedded Python and C Callback functions doc.mefisto@gmail.com - 2015-06-06 11:09 -0700
  Re: Embedded Python and C Callback functions dieter <dieter@handshake.de> - 2015-06-07 08:02 +0200
    Re: Embedded Python and C Callback functions doc.mefisto@gmail.com - 2015-06-07 01:37 -0700
    Re: Embedded Python and C Callback functions doc.mefisto@gmail.com - 2015-06-07 01:56 -0700
      Re: Embedded Python and C Callback functions Laura Creighton <lac@openend.se> - 2015-06-07 11:49 +0200
        Re: Embedded Python and C Callback functions doc.mefisto@gmail.com - 2015-06-07 02:51 -0700
      Re: Embedded Python and C Callback functions Stefan Behnel <stefan_ml@behnel.de> - 2015-06-07 22:32 +0200
    Re: Embedded Python and C Callback functions doc.mefisto@gmail.com - 2015-06-07 02:15 -0700
      Re: Embedded Python and C Callback functions dieter <dieter@handshake.de> - 2015-06-08 07:44 +0200

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