Re: [Visualpython-users] Python 2.5

[Arthur S. <ajs...@op...>]

Hi Jonathan - 

I spent some (frustrating) time with this today.

Am I correct that num_util.h and num_util.cpp are those
of Phil Austin @ Univ of British Columbia?

http://www.eos.ubc.ca/research/clouds/software/pythonlibs/num_util/num_util_release2/

If so, there is a new version targeting Numpy, as per the above link.

Except that I can't even get it to compile and run the tests correctly.

Choking on `intp` types and other places.

Grrrr...

Numpy is moving fast toward a 1.0 release and I have to wonder whether
the num_util code is incompatible with the latest Numpy.

Or else I am doing something stupid.

Meanwhile I learn more when I get in this kind of trouble than when
things go smoothly.

So I'm learning....

Art

On Sat, 2006-10-07 at 17:47 -0400, Jonathan Brandmeyer wrote:
> On Fri, 2006-10-06 at 12:40 -0600, Bruce Sherwood wrote:
> > Questions have been asked about Visual for Python 2.5. A significant 
> > hurdle to overcome is that there is not and will not be a version of 
> > Numeric for Python 2.5 (the last to be made was for Python 2.4). Its 
> > successor Numarray does exist for Python 2.5 but is likely to be the 
> > last, as the download instructions say "Use Numpy!"
> 
> The last time that I looked, the Numpy documentation was only available
> for a fee.  That is why Visual was not extended to support it last
> summer.  At any rate, the person(s) who decide to add support for Numpy
> to VPython should see below.
> 
> >  Thanks to Jonathan 
> > Brandmeyer's work, Visual can be compiled for Numarray, but some 
> > existing VPython programs that used explicit Numeric capabilities may 
> > break due to some incompatibilities between Numeric and Numarray.
> > 
> > The right thing to do is to revise Visual to use Numpy, which is the 
> > designated to-be-supported replacement for both Numeric and Numarray. I 
> > do not know how much work will be required to do this.
> 
> The revision effort should not be too difficult, as there is an
> abstraction layer for Numeric/Numarray in VPython.  Basically, at
> startup-time, a set of function pointers are initialized that refer to
> either the Numarray or Numeric implementations.  Additionally,
> Boost.Python support for the two libs is selected at run-time.
> 
> The affected files are:
> VPython 3.x:
> src/num_util_impl_numeric.cpp
> src/num_util_impl_numarray.cpp
> src/num_util.cpp
> include/num_util_impl.hpp
> include/num_util.hpp
> 
> The VPython 4.x files are setup in exactly the same way, except that
> they are found in src/python and include/python.
> 
> See also site-packages/visual/array_backend.py in both versions,
> although I think that there is a cleaner way to go about what this file
> does.
> 
> Lastly, there are some configure script elements that would need to be
> updated in acinclude.m4 (specifically, VISUAL_NUMERICLIBS).
> 
> HTH,
> -Jonathan
> 
> 
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