c++ python交互之boost.python 简集之类(class , struct)

本章描述c++类，如何被python识别和使用

c++代码:src.cpp



#include <iostream>

#include <string>

using namespace std;

/**********************************************struct and class ***********************************/

struct A

{

void greet()

{

cout << "just a test! from A" << endl;

}

};

struct B

{

B(string msg): msg(msg) {}

void set(string msg)

{

this->msg = msg;

}

void greet()

{

cout << msg << endl;

}

string msg;

};

class C

{

public:

void greet()

{

cout << "just a test! from C" << endl;

}

};



pyhton转换代码
:src4py.cpp

#include <boost/python.hpp>

#include "src.cpp"

using namespace boost::python;

BOOST_PYTHON_MODULE(test)

{

class_<A>("A")

.def("greet", &A::greet)

;

class_<B>("B",init<string>())
//注意构造函数的写法

.def("greet", &B::greet)

.def("set", &B::set)

;

class_<C>("C")

.def("greet", &C::greet)

;



//Constructors overload

class_<D>("D",init<string,int>())

.def(init<string>())

.def("printstr",&D::printstr)

.def("printint",&D::printint)

;

//if we do not wish to expose any constructors in E at all

class_<E>("E",no_init)

.def("printstr",&E::printstr)

;

class_<F>("F")

.def("initE",&F::initE)

.def("printEstr",&F::printEstr)

;

}

编译成so过程省略，如果要看makefile文件，请参照第一篇文章

http://blog.csdn.net/linkyou/archive/2011/04/14/6323940.aspx



python中调用代码
test.py

import test

obj = test.A() //对应c++的struct A

obj.greet() //structA中的方法greet

obj = test.B("just a test! from B") //对应c++的struct B，且含构造函数

obj.greet()

obj.set("test again! from B")

obj.greet()

obj = test.C()

obj.greet()

obj = test.D("just a test!",1)

obj.printstr()

obj.printint()

#if we do not wish to expose any constructors in E at all

obj = test.F()

e = obj.initE("just a test!")

e.printstr()

obj.printEstr()