[Numpy-discussion] incorporating C/C++ code (original) (raw)

Louis Cordier lcordier at point45.com
Thu Jun 29 13:55:39 EDT 2006

For heavy number crunching I would like to include C and/or C++ functions in my NumPy programs. They should have/give NumPy arrays as input/output. On http://www.scipy.org/TopicalSoftware I find several suggestions to wrap C/C++ code: SWIG, weave, Pyrex, Instant, ... but it's quite difficult for me to have an idea which one I can/should use.

This is my personal preference order: 1) If you can write Fortran code --- do it and use f2py 2) If you have well-encapsulated functions to call then use either weave or ctypes (both are very nice). 3) PyRex is a great option for writing a custom extension module that needs a lot of capability built in. At this point I would not use SWIG or Instant. So, if Fortran is out for you, then install scipy (or install weave separately) and start with weave http://www.scipy.org/Weave

Now since we are on the topic ;)

I was wondering if there where any issues with say using Psyco with NumPy ? http://psyco.sourceforge.net/

Then those number crunching code could still be in Python at least. Anyone have some benchmarks/comments ?

Regards, Louis.

-- Louis Cordier <lcordier at point45.com> cell: +27721472305 Point45 Entertainment (Pty) Ltd. http://www.point45.org

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