[C++-sig] Accessing 2D array from python in C++
John Reid
j.reid at mail.cryst.bbk.ac.uk
Thu Aug 16 17:02:03 CEST 2012
If you don't mind digging around in my code, you could download the
source code for the STEME python package from pypi and look in the
c++/myrrh directory. There is code to access multi_arrays from python in
there.
http://pypi.python.org/pypi/STEME/
In particular the file
c++/myrrh/myrrh/python/multi_array_to_numpy.h contains the bulk of the
implementation.
HTH,
John.
On 16/08/12 09:29, alfa wrote:
> Hi,
>
> Could you give more hints on this or any code snippet that I can
> implement this. I'm a bit naive in applying this. Please consider my 2D
> array of Vp_cpp(Vp equivalent in Python) is as below:
>
> typedef boost::multi_array<double, 2> array_type;
> typedef array_type::index index;
> array_type Vp_cpp(boost::extents[X_cpp][X_cpp]);
>
>
> I'm still puzzled how to "manually wrap the features" in the last "..." in:
> boost::python::class_< boost::multi_array<...> >(...)
>
> Thanks in advance.
>
> ------------------------------------------------------------------------
> *From:* Jim Bosch <talljimbo at gmail.com>
> *To:* alfa <alfarobi0161 at yahoo.com>
> *Cc:* Development of Python/C++ integration <cplusplus-sig at python.org>
> *Sent:* Wednesday, August 15, 2012 5:34 PM
> *Subject:* Re: [C++-sig] Accessing 2D array from python in C++
>
> On Aug 15, 2012 1:57 AM, "alfa" <alfarobi0161 at yahoo.com
> <mailto:alfarobi0161 at yahoo.com>> wrote:
>>
>> I apologize for double posting this because it was spammed before.
>>
>> Hi Jim,
>>
>> Do you mean, "you could wrap multi_array itself using class_", I
> should do as below:
>>
>> boost::python::class_<std::vector<std::vector<double> >
>>("PyVec").def(boost::python::vector_indexing_suite<std::vector<std::vector<double>
>> >());
>>
> No, I don't think that will work; I meant something like this:
> boost::python::class_< boost::multi_array<...> >(...)
> ...;
> Where the last "..." is where you have to manually wrap the features of
> multi_array you want to use. I'm afraid there's nothing as easy as
> vector_indexing_suite.
> Jim
>
>
>
>
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