Re: [C++-sig] Status of Numpy support in boost python - II

2011-01-04 Thread Michele De Stefano 
I also have made a small library that supports numpy.

http://code.google.com/p/mds-utils/

Try it and look if it fits your needs.


2011/1/4 Stefan Seefeld 

> On 01/03/2011 07:05 PM, Ralf W. Grosse-Kunstleve wrote:
>
>> 
>>> I think the low-level API I have  in the sandbox fits this need, or at
>>> least
>>> provides some of the basics.   I'd love to see that morph into something
>>> that
>>> we can all use to connect numpy  to the C++ template library of our
>>> choice,
>>>
>> Yes, that would be wonderful, indeed. Maybe a GSoC project?
>>
>
> Excellent idea. Let's see whether anyone is interested to pick it up (I'd
> be happy to mentor it). If not, perhaps we can make progress nonetheless.
>
>
>Stefan
>
> --
>
>  ...ich hab' noch einen Koffer in Berlin...
>
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-- 
Michele De Stefano
http://www.micheledestefano.joomlafree.it 
http://code.google.com/p/mds-utils
http://it.linkedin.com/in/micheledestefano
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Re: [C++-sig] Status of Numpy support in boost python - II

2011-01-04 Thread Neal Becker 
I'm interested in the ndarray http://code.google.com/p/ndarray package.

I still need to figure out how to get it to compile against my customized boost 
installation in a non-standard location.

Unfortunately, trying to build the 'test' results in ICE in 
gcc-4.5.1-4.fc14.x86_64 (reported upstream)

g++ -o boost.python/ndarray/libs/python/ndarray/test/ndarray_mod.os -c -O2 -fno-
strict-aliasing -g -pipe -Wall -fexceptions -fstack-protector --param=ssp-
buffer-size=4 -m64 -mtune=generic -fPIC -fwrapv -fPIC -Wp,-D_FORTIFY_SOURCE=2 -
DNDEBUG -D_GNU_SOURCE -Iinclude -I/usr/include/python2.7 -
I/usr/lib64/python2.7/site-packages/numpy/core/include -I/usr/include/eigen2 
boost.python/ndarray/libs/python/ndarray/test/ndarray_mod.cpp -I include
In file included from include/ndarray/ArrayTraits.hpp:11:0,
 from include/ndarray/Array.hpp:11,
 from include/ndarray.hpp:9,
 from include/boost/python/ndarray/Array.hpp:5,
 from include/boost/python/ndarray/ndarray.hpp:4,
 from 
boost.python/ndarray/libs/python/ndarray/test/ndarray_mod.cpp:1:
include/ndarray/ExpressionTraits.hpp: In instantiation of 
‘ndarray::ExpressionTraits, ndarray::Array, 
ndarray::detail::EqualToTag::ScalarFunction, 1> >’:
include/ndarray/ExpressionBase.hpp:33:57:   instantiated from 
‘ndarray::ExpressionBase, ndarray::Array, 
ndarray::detail::EqualToTag::ScalarFunction, 1> >’
include/ndarray/detail/BinaryOp.hpp:81:108:   instantiated from 
‘ndarray::detail::BinaryOpExpression, 
ndarray::Array, 
ndarray::detail::EqualToTag::ScalarFunction, 1>’
boost.python/ndarray/libs/python/ndarray/test/ndarray_mod.cpp:44:36:   
instantiated from ‘bool acceptArray(const ndarray::Array&) [with T = 
double, int N = 1, int C = 1]’
boost.python/ndarray/libs/python/ndarray/test/ndarray_mod.cpp:125:66:   
instantiated from here
include/ndarray/ExpressionTraits.hpp:88:165: internal compiler error: 
Segmentation fault

Jim Bosch wrote:

> On 01/03/2011 01:44 PM, Ralf W. Grosse-Kunstleve wrote:
>> - Original Message 
>>
>>> From: Neal Becker
>>> To: [email protected]
>>> Sent: Mon, January 3, 2011 12:31:36 PM
>>> Subject: [C++-sig] Status of Numpy support in boost python - II
>>>
>>> I was just re-reading these posts: Status of Numpy support in boost  python
>>> http://web.archiveorange.com/archive/v/YJlerznoeRShLhlurQzC
>>>
>>> I  wonder if there are any updates?
> 
> My low-level numpy library (basically a Boost.Python wrapper for the
> Numpy C-API) has received slow but steady updates.  This is similar to
> the built-in Boost.Python numpy support, with a few extra features:
>   - Raw-pointer access to Numpy arrays.
>   - Constructing Numpy arrays from raw C++ pointers.
>   - A C++ dtype object.
>   - Tools to wrap C++ functors to behave like broadcasting numpy
> universal functions.
> 
> This can be found in the boost sandbox:
> 
> https://svn.boost.org/svn/boost/sandbox/numpy
> 
> 
> 
> I have also built Boost.Python converters for my own ndarray library
> (see below) and Eigen 2.  Right now the build system (scons-based) is
> tailored to my own needs, but it should be pretty easy for others to
> tweak as needed.  Feel free to email me if you need help.
> 
> I've included all of those in the ndarray package, though it should be
> possible to separate out the eigen bits and not use ndarray if you'd
> like.  All that's here:
> 
> http://code.google.com/p/ndarray/
> 
>>>
>>> Is ndarray working with current (1.45.0)  boost?
> 
> Probably.  I haven't tested 1.45, I compiled recently on 1.44.  I have
> been doing most of my work using 1.40, but I don't think anything has
> changed in Boost.Python since then that would affect ndarray.
> 
>>
>> Boost.Python's existing numpy array support has been working all the time. It
>> sounds like you are expecting new functionality. Could you be more specific?
>>
> 
> 
> 
> I think the low-level API I have in the sandbox fits this need, or at
> least provides some of the basics.  I'd love to see that morph into
> something that we can all use to connect numpy to the C++ template
> library of our choice, since we'll all never agreed on those.
> 
> Jim


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Re: [C++-sig] Status of Numpy support in boost python - II

2011-01-04 Thread Jim Bosch 

On 01/04/2011 05:34 AM, Neal Becker wrote:

I'm interested in the ndarray http://code.google.com/p/ndarray package.

I still need to figure out how to get it to compile against my customized boost
installation in a non-standard location.

Unfortunately, trying to build the 'test' results in ICE in
gcc-4.5.1-4.fc14.x86_64 (reported upstream)



Hmm.  I haven't seen that, but I also haven't tried gcc 4.5 yet. 
Unfortunately, you've caught me in a busy week, but I'll make an effort 
to try gcc 4.5 (and boost 1.45) as soon as I can.


Hopefully I can at least come up with a simple test case to help the gcc 
people out.


In the meantime, if you just do "scons ndarray-test", do you still get 
the crash?  That should exercise the same code that seems to be giving 
gcc trouble without any Python involvement.


Jim

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Re: [C++-sig] Status of Numpy support in boost python - II

2011-01-04 Thread Jim Bosch 

On 01/03/2011 04:46 PM, Stefan Seefeld wrote:

On 01/03/2011 07:05 PM, Ralf W. Grosse-Kunstleve wrote:


I think the low-level API I have in the sandbox fits this need, or at
least
provides some of the basics. I'd love to see that morph into
something that
we can all use to connect numpy to the C++ template library of our
choice,

Yes, that would be wonderful, indeed. Maybe a GSoC project?


Excellent idea. Let's see whether anyone is interested to pick it up
(I'd be happy to mentor it). If not, perhaps we can make progress
nonetheless.


I'd be happy to help as well, though I don't really have the experience 
with boost development necessary to qualify as a mentor.  I'll start by 
putting together a README file for the sandbox library over the next few 
days so others can get a better idea of where we might be starting from.


Aside from direct data access (and the other things I have implemented 
already), what else should such a library do?  One thing I can think of 
off the top of my head is automatic conversion for Numpy scalar types - 
I'm pretty sure someone else on this list has implemented that 
somewhere, but it's not present in the sandbox library.


Jim
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