Interfacing C++ and Python

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References

Quick start

  • command line under linux
:> g++ -shared myfile.cpp -I/usr/include/python2.6 -lboost_python -o myfile.so -fPIC


This compiles the basic example below:

<source lang="cpp"> // myfile.h struct World {

 void set(std::string msgin) {this->msg=msgin ;}
 std::string greet() {return msg ;}
 std::string msg;

} ; </source>

<source lang="cpp"> // myfile.cpp #include <boost/python.hpp>

  1. include "myfile.h"

using namespace boost::python;

BOOST_PYTHON_MODULE(hello) {

 def("greet", greet, "return one of three parts of a greeting");
 class_<World>("World")
   .def("greet",&World::greet)
   .def("set",&World::set)
   ; 

} </source>

which runs under python as <source lang="py"> In [1]: import hello In [2]: planet = hello.World() In [3]: planet.set('howdy') In [4]: planet.greet() Out[4]: 'howdy' </source>