[SciPy-user] FYI: C++ Extensions for Python
bob at redivi.com
Mon Nov 1 17:51:14 CST 2004
On Nov 1, 2004, at 17:51, David Grant wrote:
> Just thought I'd share my experiences concerning looking for a way to
> make python interfaces for C++ code (see my previous thread about
> pycxx - Looks like it requires one to modify all the C++ source,
> adding PyObject pointers everywhere. I stayed away from this. I
> don't want to modify the code if I have to (why should I have to? the
> reason I'm making an interface is so that I can use the C++ code, and
> not touch it, thus avoiding creating bugs in the C++ code. If I
> WANTED to touch the C++ code I'd just re-write in python).
> boost.python - Horrible documentation and horrible setup. Nothing
> good to say about this. I spent more time on this than any other
> method and made the least progress.
> weave - was going to write a python routine which had some small piece
> weave code. The weave code would be talking to a C++ library or
> compiled python extension or something. I was able to make a C++
> library containing all my C++ code but then abandoned it after that,
> to see if there were simpler methods
> python.org method - http://docs.python.org/ext/simpleExample.html -
> Similar to pycxx it involved altering the code
> swig - at first it seemed like a lot of work to copy everything from
> the .h files into the .i file. But then I realized you can just use
> %include and it will use that stuff for swig. Simple examples are
> given in the docs for both C and C++ which work well. I like how it
> just generates an extra .c wrapper file which is then compiled to a .o
> file and linked together will all the other .o files and libraries
> (like -llapack) into a python extension, very simply. Extend any
> methods or functions you want. I had a problem because the C++ class
> overloaded the operator+ method, but there is any easy to fix that in
> the docs, calling the python wrapper __add__ instead.
> So far swig is my choice. Boost.python looked good but I simple
> couldn't get bjam to work!
Uh, where does it say that you need to use bjam? It works just fine
outside of that environment... take a look at Fusion
<http://itamarst.org/software/> for example.
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