Re: Extended functions in embedded code
Hi,
I've read many docs and examples, then I made a usable test version. If
anybody interested about this (and for the mailing list archives), then it
could be found here:
https://code.activestate.com/recipes/579110-add-function-to-__builtin__-module-through-c-api/
Hope this helps, and many thanks for all help.
Cheers,
a.
ps: after I've done, I realized, that will not good for me :). Nevermind,
this was a funny work.
On Tue, Oct 13, 2015 at 1:36 PM, Ervin Hegedüs wrote:
> Hello there,
>
> I'm interesting for the embeding of Python code - the examples and docs
> are very helpfully. The main code, which embeds the Python interpreter, had
> written in C. There are several functions, what I have to use in embedded
> (Python) code, so I must to write them as Python extension.
>
> That's no problem - I found a solution for that, I don't need to made (and
> I don't _want_) a separated .so file (a new Python module): the extension
> in same C source, where the embedded code exists, like this:
>
> #include
> #include
>
> /* python mymodule */
> static PyObject*
> mymodule_usleep(PyObject *self, PyObject *args)
> {
> ...
> }
>
> ...
> static PyMethodDef mymodule_methods[] = {
> {"usleep",mymodule_usleep,METH_VARARGS,
> mymodule_usleep_doc},
> {NULL, NULL}
> };
>
> PyMODINIT_FUNC
> initmymodule(void)
> {
> (void) Py_InitModule("mymodule", mymodule_methods);
> }
>
> /* python mymodule */
>
>
> /* python embedding */
> void foo() {
> Py_Initialize();
> initmymodule();
>
> Py_Finalize();
> }
>
> /* python embedding */
>
>
> Then I have a Python file, which the code above calls:
>
> import mymodule
>
> def bar(d)
> do_something()
> mymodule.usleep(1)
> return something
>
>
> Just my "2 cents" question: is there any way to make the extension without
> "import" keyword? Or is there a way to leave that?
>
>
> Thanks,
>
>
> a.
>
--
https://mail.python.org/mailman/listinfo/python-list
Re: Extended functions in embedded code
On Wed, Oct 14, 2015 at 12:02:36AM +0200, Laura Creighton wrote: > In a message of Tue, 13 Oct 2015 22:28:54 +0200, Ervin Hegedüs writes: > >Hi Chris, > > > >what I misses: currently I'm using Python 2.7. > > > >On Wed, Oct 14, 2015 at 02:48:57AM +1100, Chris Angelico wrote: [...] > > > >PyModule_AddFunction was introduced in Python 3.5. Most of stable > >Linux distribution has Python 3.4 > > > >> instead of the current module initialization. You import the name > >> 'builtins', stuff some extra stuff into it, and then go on your merry > >> way. It should be reasonably easy. > > > >Is there any other solution to add functions to builtins? > > > > You can stuff things into the __dict__ of __builtin__ if you like. > It's highly frowned upon. > But see discussion attatched to: > http://code.activestate.com/recipes/577888-see-what-the-builtins-are/ As I understand this, it shows the Python's builtins (or __builtins__) capabilities. As Chris wrote, the soultion would be, that I'm loading the __builtins__ module in C (through API), and add/extend its __dict__ with my funtions. The link above doesn't help me in this :). Thanks, a. -- https://mail.python.org/mailman/listinfo/python-list
Re: Extended functions in embedded code
On Wed, Oct 14, 2015 at 7:28 AM, Ervin Hegedüs wrote:
> Hi Chris,
>
> what I misses: currently I'm using Python 2.7.
Oh, sorry. In that case, you'll be importing "__builtin__" rather than
"builtins", but the same technique works.
> On Wed, Oct 14, 2015 at 02:48:57AM +1100, Chris Angelico wrote:
>> It'd look broadly like this:
>>
>> /* initialize the interpreter, yada yada */
>> PyObject *builtins = PyImport_ImportModule("builtins");
>> PyModule_AddFunctions(builtins, mymodule_methods);
>
> PyModule_AddFunction was introduced in Python 3.5. Most of stable
> Linux distribution has Python 3.4
It's been years since I actually did this, so I cheated and just
flipped through the docs :) But there'll be a way to create a Python
function from a C function, and then you can simply stuff that into
the module's dictionary.
ChrisA
--
https://mail.python.org/mailman/listinfo/python-list
Re: Extended functions in embedded code
In a message of Tue, 13 Oct 2015 22:28:54 +0200, Ervin Hegedüs writes:
>Hi Chris,
>
>what I misses: currently I'm using Python 2.7.
>
>On Wed, Oct 14, 2015 at 02:48:57AM +1100, Chris Angelico wrote:
>> On Wed, Oct 14, 2015 at 2:29 AM, Ervin Hegedüs wrote:
>> >>
>> >> Sounds to me like the easiest way would be to inject into the
>> >> builtins. You should be able to import the builtins module from your C
>> >> code, and then stuff some extra attributes into it; they'll be
>> >> automatically available to the script, same as the "normal" built-in
>> >> names like int, super, and ValueError.
>> >
>> > well, sounds good - this solution would be right for me. Could
>> > you show me a good example and/or documentation about this? I've
>> > looked up, but "python extend built-in module" is may be too
>> > simple expression :).
>>
>> It'd look broadly like this:
>>
>> /* initialize the interpreter, yada yada */
>> PyObject *builtins = PyImport_ImportModule("builtins");
>> PyModule_AddFunctions(builtins, mymodule_methods);
>
>PyModule_AddFunction was introduced in Python 3.5. Most of stable
>Linux distribution has Python 3.4
>
>> instead of the current module initialization. You import the name
>> 'builtins', stuff some extra stuff into it, and then go on your merry
>> way. It should be reasonably easy.
>
>Is there any other solution to add functions to builtins?
>
>
>Thanks,
>
>a.
You can stuff things into the __dict__ of __builtin__ if you like.
It's highly frowned upon.
But see discussion attatched to:
http://code.activestate.com/recipes/577888-see-what-the-builtins-are/
Laura
--
https://mail.python.org/mailman/listinfo/python-list
Re: Extended functions in embedded code
On 10/13/2015 1:32 PM, Ervin Hegedüs wrote: Hi, On Tue, Oct 13, 2015 at 08:55:42AM -0700, Emile van Sebille wrote: On 10/13/2015 8:29 AM, Ervin Hegedüs wrote: Hi Chris, On Wed, Oct 14, 2015 at 02:05:43AM +1100, Chris Angelico wrote: Sounds to me like the easiest way would be to inject into the builtins. You should be able to import the builtins module from your C code, and then stuff some extra attributes into it; they'll be automatically available to the script, same as the "normal" built-in names like int, super, and ValueError. well, sounds good - this solution would be right for me. Could you show me a good example and/or documentation about this? I've looked up, but "python extend built-in module" is may be too simple expression :). Maybe the site module helps you. See https://docs.python.org/3/library/site.html no, I think this module is totally different, what I need. or perhaps http://stackoverflow.com/questions/8608587/finding-the-source-code-for-built-in-python-functions Emile -- https://mail.python.org/mailman/listinfo/python-list
Re: Extended functions in embedded code
Hi, On Tue, Oct 13, 2015 at 08:55:42AM -0700, Emile van Sebille wrote: > On 10/13/2015 8:29 AM, Ervin Hegedüs wrote: > >Hi Chris, > > > >On Wed, Oct 14, 2015 at 02:05:43AM +1100, Chris Angelico wrote: > > >>Sounds to me like the easiest way would be to inject into the > >>builtins. You should be able to import the builtins module from your C > >>code, and then stuff some extra attributes into it; they'll be > >>automatically available to the script, same as the "normal" built-in > >>names like int, super, and ValueError. > > > >well, sounds good - this solution would be right for me. Could > >you show me a good example and/or documentation about this? I've > >looked up, but "python extend built-in module" is may be too > >simple expression :). > > Maybe the site module helps you. See > https://docs.python.org/3/library/site.html no, I think this module is totally different, what I need. thanks, a. -- I � UTF-8 -- https://mail.python.org/mailman/listinfo/python-list
Re: Extended functions in embedded code
Hi Chris,
what I misses: currently I'm using Python 2.7.
On Wed, Oct 14, 2015 at 02:48:57AM +1100, Chris Angelico wrote:
> On Wed, Oct 14, 2015 at 2:29 AM, Ervin Hegedüs wrote:
> >>
> >> Sounds to me like the easiest way would be to inject into the
> >> builtins. You should be able to import the builtins module from your C
> >> code, and then stuff some extra attributes into it; they'll be
> >> automatically available to the script, same as the "normal" built-in
> >> names like int, super, and ValueError.
> >
> > well, sounds good - this solution would be right for me. Could
> > you show me a good example and/or documentation about this? I've
> > looked up, but "python extend built-in module" is may be too
> > simple expression :).
>
> It'd look broadly like this:
>
> /* initialize the interpreter, yada yada */
> PyObject *builtins = PyImport_ImportModule("builtins");
> PyModule_AddFunctions(builtins, mymodule_methods);
PyModule_AddFunction was introduced in Python 3.5. Most of stable
Linux distribution has Python 3.4
> instead of the current module initialization. You import the name
> 'builtins', stuff some extra stuff into it, and then go on your merry
> way. It should be reasonably easy.
Is there any other solution to add functions to builtins?
Thanks,
a.
--
I � UTF-8
--
https://mail.python.org/mailman/listinfo/python-list
Re: Extended functions in embedded code
On 10/13/2015 8:29 AM, Ervin Hegedüs wrote: Hi Chris, On Wed, Oct 14, 2015 at 02:05:43AM +1100, Chris Angelico wrote: Sounds to me like the easiest way would be to inject into the builtins. You should be able to import the builtins module from your C code, and then stuff some extra attributes into it; they'll be automatically available to the script, same as the "normal" built-in names like int, super, and ValueError. well, sounds good - this solution would be right for me. Could you show me a good example and/or documentation about this? I've looked up, but "python extend built-in module" is may be too simple expression :). Maybe the site module helps you. See https://docs.python.org/3/library/site.html Emile -- https://mail.python.org/mailman/listinfo/python-list
Re: Extended functions in embedded code
On Wed, Oct 14, 2015 at 2:29 AM, Ervin Hegedüs wrote:
>>
>> Sounds to me like the easiest way would be to inject into the
>> builtins. You should be able to import the builtins module from your C
>> code, and then stuff some extra attributes into it; they'll be
>> automatically available to the script, same as the "normal" built-in
>> names like int, super, and ValueError.
>
> well, sounds good - this solution would be right for me. Could
> you show me a good example and/or documentation about this? I've
> looked up, but "python extend built-in module" is may be too
> simple expression :).
It'd look broadly like this:
/* initialize the interpreter, yada yada */
PyObject *builtins = PyImport_ImportModule("builtins");
PyModule_AddFunctions(builtins, mymodule_methods);
instead of the current module initialization. You import the name
'builtins', stuff some extra stuff into it, and then go on your merry
way. It should be reasonably easy.
ChrisA
--
https://mail.python.org/mailman/listinfo/python-list
Re: Extended functions in embedded code
Hi Chris, On Wed, Oct 14, 2015 at 02:05:43AM +1100, Chris Angelico wrote: > On Wed, Oct 14, 2015 at 1:59 AM, Ervin Hegedüs wrote: > > no, I have filesystem. I help to contribute a software, which had > > written in C. The configuration schema is very simple, there are > > several keywords, but not all required function could be > > configure with them. Python would be a good choice, but the > > users aren't programmers in most cases. I just don't want to > > start the documentation, that > > > > "Make a Python script like this: > > > > import mymodul > > > > " > > > > and nobody knows, why is it require, because there isn't any > > module with this name. > > Sounds to me like the easiest way would be to inject into the > builtins. You should be able to import the builtins module from your C > code, and then stuff some extra attributes into it; they'll be > automatically available to the script, same as the "normal" built-in > names like int, super, and ValueError. well, sounds good - this solution would be right for me. Could you show me a good example and/or documentation about this? I've looked up, but "python extend built-in module" is may be too simple expression :). a. -- https://mail.python.org/mailman/listinfo/python-list
Re: Extended functions in embedded code
On Wed, Oct 14, 2015 at 1:59 AM, Ervin Hegedüs wrote: > no, I have filesystem. I help to contribute a software, which had > written in C. The configuration schema is very simple, there are > several keywords, but not all required function could be > configure with them. Python would be a good choice, but the > users aren't programmers in most cases. I just don't want to > start the documentation, that > > "Make a Python script like this: > > import mymodul > > " > > and nobody knows, why is it require, because there isn't any > module with this name. Sounds to me like the easiest way would be to inject into the builtins. You should be able to import the builtins module from your C code, and then stuff some extra attributes into it; they'll be automatically available to the script, same as the "normal" built-in names like int, super, and ValueError. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
Re: Extended functions in embedded code
Hi, On Tue, Oct 13, 2015 at 02:51:21PM +0200, Laura Creighton wrote: > Are you looking for this:? > https://docs.python.org/3.5/library/runpy.html I think I'm not - I'm afraid, the runpy modul wasn't developed for me, for this reason. > or maybe this:? > https://docs.python.org/3.5/library/importlib.html#importlib.import_module I think this is just an "alias" of the standard import. > Or is your real problem 'I don't have a filesystem'? no, I have filesystem. I help to contribute a software, which had written in C. The configuration schema is very simple, there are several keywords, but not all required function could be configure with them. Python would be a good choice, but the users aren't programmers in most cases. I just don't want to start the documentation, that "Make a Python script like this: import mymodul " and nobody knows, why is it require, because there isn't any module with this name. As I wrote, that's just my 2-cents question, not a critical issue - it could be better to know, is it possible or not. That's all :) a. -- https://mail.python.org/mailman/listinfo/python-list
Re: Extended functions in embedded code
Are you looking for this:? https://docs.python.org/3.5/library/runpy.html or maybe this:? https://docs.python.org/3.5/library/importlib.html#importlib.import_module Or is your real problem 'I don't have a filesystem'? Laura -- https://mail.python.org/mailman/listinfo/python-list
