Hi Shivam
Sounds like you are on the right path. Have a go at the SWIG bindings
for Instance following the pattern of FPROPS. Give it a try, let me know
when you have something.
Thanks for the clarification about the wiki info. I will try to get that
updated ASAP.
Cheers
JP
On 10/03/15 02:50, Shivam Chaturvedi wrote:
> Hello John,
> I've had a look at the ascxx interface file and I saw how the Instance
> file is defined as a list of the prototypes instead of a single header
> file as the other classes have been defined. I believe the task right
> now is to convert this list of prototypes to a similar header file
> that can directly be included in the interface file. I've studies the
> involved source codes. I'm continuing to understand the system by
> looking at the FPROPS module as you told me to.
> I believe it would be good for me to develop the SWIG interface file
> for the Instance class so that you could see if I have developed
> enough understanding of the rewriting process.
>
> Would love to hear from you on further steps.
>
> *PS* I looked at the Building ASCEND wiki page, and the svn checkout
> link is incorrectly stated as
> ' svn co svn://ascend4.org/ <http://ascend4.org/>code/trunk
> ascend ' which seems to refuse connections.
> instead of
> ' svn co http://svn.ascend4.org/trunk/ascend ' which works fine.
>
>
> Thank you!
>
> On Thu, Mar 5, 2015 at 3:30 PM Shivam Chaturvedi <[email protected]
> <mailto:[email protected]>> wrote:
>
> Thank you for such a detailed response. I looked at SWIG before I
> found this project interesting and I agree that it would make our
> lives quite easier if we followed SWIG and later came up with
> binding for R, Octave etc. (which was also something I thought of
> when I looked at SWIG as a project, but yeah, later developments).
> I'll look into the suggested readings and get back to you with my
> ideas.
>
> Thanks,
> Shivam
>
> On Thu, Mar 5, 2015 at 6:59 AM John Pye <[email protected]
> <mailto:[email protected]>> wrote:
>
> Hi Shivam
>
> As you can probably appreciate, this project represents a
> pretty major effort and will require both a deep and broad
> understanding of the ASCEND APIs in C, as well as the
> requirements of the current PyGTK GUI. I think that the work
> should probably start with Pallav Tinna's branch of the
> repository, which already migrates the GUI from GTK2 to GTK3
> toolkit. The goal would be to eliminate the C++ and STL code
> as far as possible, and aim for faster and lighter Python
> bindings, while also aiming at a clean and maintainable
> approach. I believe that SWIG is quite capable as a tool for
> doing this, and I myself am very comfortable with SWIG, but if
> you can see a strong case for adopting another tool then we
> can consider that. One aspect of SWIG that is a appealing is
> that in principle it can be used to target several different
> scripting languages. Of interest for scientific work would be
> R, Octave, Scilab and possibly a couple of others. This is not
> a priority for us, but is a mild reason to stick with the SWIG
> approach, as I see it.
>
> For some inspiration on bindings from Python to C, I suggest
> you look at the code of FPROPS [1]. That wrapper builds
> object-oriented Python classes based around C structs and
> associated methods. I think that an early start on the
> proposed project could be made by attempting to reproduce this
> approach for the 'instance' data structures in the ASCEND C
> API. You can take a look at how this is done currently at
> [2-4]. There is probably benefit in also wrapping some of the
> generic types in ASCEND, such as gl_list [5], which are used
> extensively if not quite universally, in the ASCEND C code.
>
> Hopefully that provides some starting points for you. Take a
> look and let me know how you go.
>
> Cheers
> JP
>
> [1]
>
> http://code.ascend4.org/ascend/trunk/models/johnpye/fprops/python/fprops.i?revision=2774&view=markup
> [2]
> http://code.ascend4.org/ascend/trunk/ascxx/instance.cpp?view=markup
> [3] http://code.ascend4.org/ascend/trunk/ascxx/instance.h?view=log
> [4] http://code.ascend4.org/ascend/trunk/ascxx/ascpy.i?view=markup
> [5]
> http://code.ascend4.org/ascend/trunk/ascend/general/list.h?view=markup
>
>
> On 05/03/15 06:31, Shivam Chaturvedi wrote:
>> Hello ASCEND Devs,
>> I am Shivam Chaturvedi. I had a look at one of your projects
>> that I became keenly interested on. It was the "Python
>> Bindings Rewrite" project, which understandably requires the
>> knowledge of Python, C++ and knowledge of concerned
>> programming paradigms such as interfaces, etc. I'm fluent in
>> both the languages at a decent level and have previously
>> worked a bit in both (Even taught Python to undergrad students!).
>> I have downloaded ASCEND on my linux machine (and started to
>> fiddle with it!) to see how I would think the software
>> must've been put up, in addition to (trying) to read the
>> source (mainly examples for now).
>> I wish to contribute in all ways possible to this project.
>> Might be needless, but to state, I'm a student at IIIT-Delhi,
>> India, and would love to work with you guys.
>> Please let me know what more I can do to help out.
>>
>> Thanks!
>> Shivam Chaturvedi
>>
>>
>>
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