ANN: PyUblas -- Numpy+Boost.Ublas = happy

Hi all,

I'm pleased to announce the availability of PyUblas, a
software bridge between 
Numpy and Boost.Ublas, for use with Boost.Python.

PyUblas lets you use the "native" matrix library
on either side of the 
language "fence". This is achieved without any
copying at the language 
boundary. The end result is a very fast and convenient
environment for 
writing hybrid numerical codes.

To do its magic, PyUblas defines new Ublas-derived matrix
and vector types, 
called numpy_matrix and numpy_vector. These hold their
internal data in Numpy 
arrays, and can therefore be passed to and from Python
without penalty. 
Variables of these types can be used directly in Ublas's C++
vector and 
matrix expressions, without any copying or conversion, and
achieve the same 
speed as Ublas's native types. In addition, PyUblas exposes
(copying) 
converters for many of Ublas's own types.

The package also (optionally) wraps Ublas's sparse matrix
types for use in 
Python. An add-on module called PyUblasExt supplies
additional functionality 
for these types, such as solvers for linear systems and
eigenvalue problems.

There's much more material available here:

http://math
ema.tician.de/software/pyublas

Enjoy,
Andreas

PS: PyUblas also automatically converts Numpy "array
scalars" from Python to 
C++. Ger, you listening? 

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Andreas Klöckner wrote:

Thanks.  I pulled from git today, I get:

[nbeckernbecker1 pyublasext]$ python setup.py build
Traceback (most recent call last):
  File "setup.py", line 130, in <module>
    main()
  File "setup.py", line 12, in main
    execfile("siteconf.py", conf)
  File "siteconf.py", line 62, in <module>
    from pytools import flatten
ImportError: No module named pytools

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Andreas Klöckner wrote:

If you could add a configure option to add RPATH into the
link for the .so,
that would be useful (I use boost svn which is in a
non-standard place).

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LD_LIBRARY_PATH=/usr/local/src/boost.hg/stage/lib python
./do_test.py
Traceback (most recent call last):
  File "./do_test.py", line 1, in <module>
    from pyublas._internal import dblmat, dblvec
ImportError: cannot import name dblmat



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Hi Neal,

On Montag 21 April 2008, Neal Becker wrote:
> LD_LIBRARY_PATH=/usr/local/src/boost.hg/stage/lib
python ./do_test.py
> Traceback (most recent call last):
>   File "./do_test.py", line 1, in
<module>
>     from pyublas._internal import dblmat, dblvec
> ImportError: cannot import name dblmat

That test script is stale and should have been deleted long
ago, sorry. 
PyUblas's tests are currently part of PyUblasExt. I'll fix
that in one of the 
next releases.

Andreas

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On Montag 21 April 2008, Neal Becker wrote:
> Andreas Klöckner wrote:
>
> If you could add a configure option to add RPATH into
the link for the .so,
> that would be useful (I use boost svn which is in a
non-standard place).

Config option --ldflags, new in 0.92.1.

--Andreas

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On Montag 21 April 2008, Neal Becker wrote:
> Andreas Klöckner wrote:
>
> Thanks.  I pulled from git today, I get:
>
> [nbeckernbecker1 pyublasext]$ python setup.py
build
> Traceback (most recent call last):
>   File "setup.py", line 130, in
<module>
>     main()
>   File "setup.py", line 12, in main
>     execfile("siteconf.py", conf)
>   File "siteconf.py", line 62, in
<module>
>     from pytools import flatten
> ImportError: No module named pytools

Argh. Sorry. Fixed in 0.91.2.

--Andreas

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