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

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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",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
<a href="http://blog.csdn.net/linkyou/archive/2011/04/14/6323940.aspx">http://blog.csdn.net/linkyou/archive/2011/04/14/6323940.aspx</a>


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()

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