numpy interface

[sfomel]

Update the python API from numarray to numpy.

Reported by: sfomel

[sfomel]

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Follow the guidelines in

http://www.scipy.org/Converting_from_numarray?highlight=%28numarray%29

and change filt/lib/rsf.i

Original comment by: sfomel

[sfomel]

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There is also /filt/lib/rsf.py to change, but that is
quite simple – just replace automatically all instances of
the ‘numarray’ string with ‘numpy’ in any text editor.

Original comment by: nickvlad

[sfomel]

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I found out today that Python 2.5 (now available as beta
3) will include the ctypes module! So they will become the
recommended method for calling C. I read about ctypes in
Oliphant’s book (great resource on this topic). Apparently
there is no need for wrappers! Just import the ctypes
module and call the functions. The python layer mentioned
by Oliphant is if you want bounds-checking safety and the
like. It is what rsf.py provides to the c_rsf module
anyway. Ctypes was created especially for calling large
existing shared libraries from Python without a wrapper.
Numpy works well with it too. I will try to look into
redoing the API with ctypes, but: (1) my fiancee comes
tomorrow; (2) the wedding is in 2 weeks (3) after that I
have to move to another apartment and (4) I do not trust
my Python abilities very much. So I do not dare to even
ask to be assigned to this. I’ll see what I can do, but I
cannot promise anything.
Nick

Original comment by: nickvlad

[sfomel]

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After converting to numpy, add a Python example to
http://rsf.sourceforge.net/wiki/index.php/Demo

Original comment by: sfomel

[sfomel]

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With the much appreciated help of Darren Thomson, we updated the API Python
from numarray to numpy. Note that if you have ONLY numarray, the API Python
will use numarray but if you have both numarray and numpy, or only numpy, API
Python uses numpy.

I also updated the Python example on the wiki.

Original comment by: hegilles