swig使python能调用C++

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总的步骤就是用swig生成相应的cxx，然后再在程序中调用python开放给C++的接口来调用python脚本。

1、C++头文件

testSWIG.h

std::string SWIGFunction();

   class SWIGClass

   {   public:      SWIGClass( int value );

      void PrintValue();

   protected:      int m_value;   };

2、SWIG 接口文件

SWIGME.i

   /* File : SWIGME.i */

   %module SWIGME

   %include "std_string.i"

   /* Let's just grab the original header file here */

   %include "testSWIG.h"

3、生成SWIGME_wrap.cxx

打开控制台，进入到前面两个文件所在的目录，输入：

  swig -c++ -python SWIGME.i

成功的话就会在当前目录下生成SWIGME_wrap.cxx和SWIGME.py两个文件。

4. 动态调用C++代码的python脚本

test.py

   import SWIGME   s = SWIGME.SWIGFunction()   print "Result of SWIGME.SWIGFunction: " + s   print "Creating SWIGME.SWIGClass of 10:"   a = SWIGME.SWIGClass( 10 )   a.PrintValue()   print "Creating SWIGME.SWIGClass of 42:"   b = SWIGME.SWIGClass( 42 )   b.PrintValue()

5、C++实现代码

SWIGME.h

#include <string>#include <iostream>class SWIGClass{public:    SWIGClass( int value );    void PrintValue();protected:    int m_value;};

SWIGME.cpp

#include "SWIGME.h"SWIGClass::SWIGClass( int value ) : m_value( value ){}void SWIGClass::PrintValue(){ std::cout << "My Value is " << m_value << std::endl;}

6、测试代码

test.cpp

#include "SWIGME.h"#include "SWIGME_wrap.cxx"int main() {    std::cout << "Exporting C++!" << std::endl;    Py_Initialize();                // initialize python    // initialize SWIGME module:    init_SWIGME();    // Import and run swiggy:    PyRun_SimpleString( "import test" );    Py_Finalize();                  // shut down python    return 0;}

如果成功的话，显示结果将为

Exporting C++!Result of SWIGME.SWIGFunction: This has been brought to you by the letter CCreating SWIGME.SWIGClass of 10:My Value is 10Creating SWIGME.SWIGClass of 42:My Value is 42