Re: [igraph] Using iGraph API in Python C module

[Tamas Nepusz]

Dear Chris -

I have added igraph.get_include() in the following commit:

https://github.com/igraph/python-igraph/commit/e50191d6f96b48b2885f425b8c725f0768443245

This will probably make it into python-igraph 0.7.1.post7, 0.7.2 or 0.8,
whichever will come first. Let me know if it's urgent for you to get this in an
official release -- in that case, I can probably push out 0.7.1.post7 next
week.

All the best,
Tamas

On 05/22, Chris Cameron wrote:
> Dear Tamas - 
> 
> Thanks for the reply. I got a basic sample working that sends the result of 
> g.__graph_as_cobject() from Python to C and casts that pointer it an 
> igraph_t*. I think this means the pointer reference is borrowed and that I 
> can avoid managing de-referencing in the C code but I still need to test for 
> memory leaks. I don’t understand the relative advantages of raw_pointer() vs 
> graph_as_cobject().
> 
> If PyIGraph_ToCGraph() is the preferred method, I wish the igraphmodule_api.h 
> was distributed with the iGraph C library so it would be in a standard 
> location <igraph/igraphmodule_api.h> . An alternative would be to provide a 
> function like numpy.distutils.misc_util.get_numpy_include_dirs() that returns 
> the install path for python iGraph. I think this would make the setup.py for 
> iGraph-based extensions more portable.
> 
> The linked git shows a way to use C-iGraph functions on a graph created in 
> Python and how to return computation results as both floats and numpy arrays. 
> The numpy arrays are created in Python and filled by the C code. It is rough 
> code, pieced together from many sources, and the sample computations are 
> trivial examples. I would welcome feedback that improves code quality or 
> implements better practices.
> 
> https://github.com/chrisjcameron/python_igraph_numpy_c_ext 
> <https://github.com/chrisjcameron/python_igraph_numpy_c_ext>
> 
> Thanks,
> Chris

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-- 
T.