很多时候需要给c++程序提供一种使用上的灵活性，脚本语言在这里就变得很重要了。采用Boost.Python为c++程序加一层shell，比较简单、简洁，对原有的c++代码也没有侵入性。今天试了一下，感觉不错，可以把它集成在现在正在做的项目中。
我主要参照David Abrahams的"Building Hybrid Systems with Boost.Python"(http://www.boost-consulting.com/writing/bpl.html)一文，该文中对编译 过程说的较少，偶就略做补充，为新手节省点时间（偶也是python新手）。
为c++类加python shell过程基本上如下：
(1)为c++类编写一个Boost.Python wrapper
(2)编译成so
(3)可以在python中调用了
针对David Abrahams的例子，偶的源文件如下：
例1：hello world 函数
(1)hello.cpp
(1)hello_class.cpp
我主要参照David Abrahams的"Building Hybrid Systems with Boost.Python"(http://www.boost-consulting.com/writing/bpl.html)一文，该文中对编译 过程说的较少，偶就略做补充，为新手节省点时间（偶也是python新手）。
为c++类加python shell过程基本上如下：
(1)为c++类编写一个Boost.Python wrapper
(2)编译成so
(3)可以在python中调用了
针对David Abrahams的例子，偶的源文件如下：
例1：hello world 函数
(1)hello.cpp
#include
<
stdexcept
>
char const * greet(unsigned x)
{
static char const * const msgs[] = { " hello " , " Boost.Python " , " world! " };
if (x > 2 )
throw std::range_error( " greet: index out of range " );
return msgs[x];
}
(2)hello_wrap.cpp
char const * greet(unsigned x)
{
static char const * const msgs[] = { " hello " , " Boost.Python " , " world! " };
if (x > 2 )
throw std::range_error( " greet: index out of range " );
return msgs[x];
}
#include
<
boost
/
python.hpp
>
using namespace boost::python;
char const * greet(unsigned x);
BOOST_PYTHON_MODULE(hello)
{
def( " greet " , greet, " return one of 3 parts of a greeting " );
}
(3)makefile
using namespace boost::python;
char const * greet(unsigned x);
BOOST_PYTHON_MODULE(hello)
{
def( " greet " , greet, " return one of 3 parts of a greeting " );
}
PYTHON_INCLUDE_FLAGS
=
\
- I / usr / include / python2. 4
LIB_FLAGS = \
- lboost_python
SOURCE = \
hello.cpp hello_wrap.cpp
all:${SOURCE}
g ++ ${PYTHON_INCLUDE_FLAGS} ${SOURCE} ${LIB_FLAGS} - shared - o hello.so
clean:
rm - f hello * .o * . out * .so
(4)hello.py
- I / usr / include / python2. 4
LIB_FLAGS = \
- lboost_python
SOURCE = \
hello.cpp hello_wrap.cpp
all:${SOURCE}
g ++ ${PYTHON_INCLUDE_FLAGS} ${SOURCE} ${LIB_FLAGS} - shared - o hello.so
clean:
rm - f hello * .o * . out * .so
import hello
for x in range( 3 ):
print hello.greet(x)
例2：hello world类
for x in range( 3 ):
print hello.greet(x)
(1)hello_class.cpp
#include
<
boost
/
python.hpp
>
#include < iostream >
using namespace std;
using namespace boost::python;
class World
{
public :
void set (std:: string msg) { this -> msg = msg; }
void greet()
{
cout << this -> msg << endl;
}
string msg;
};
BOOST_PYTHON_MODULE(hello)
{
class_ < World > w( " World " );
w.def( " greet " , & World::greet);
w.def( " set " , & World:: set );
};
(2)makefile
#include < iostream >
using namespace std;
using namespace boost::python;
class World
{
public :
void set (std:: string msg) { this -> msg = msg; }
void greet()
{
cout << this -> msg << endl;
}
string msg;
};
BOOST_PYTHON_MODULE(hello)
{
class_ < World > w( " World " );
w.def( " greet " , & World::greet);
w.def( " set " , & World:: set );
};
PYTHON_INCLUDE_FLAGS
=
\
- I / usr / include / python2. 4
LIB_FLAGS = \
- lboost_python
SOURCE = \
hello_class.cpp
all:${SOURCE}
g ++ ${PYTHON_INCLUDE_FLAGS} ${SOURCE} ${LIB_FLAGS} - shared - o hello.so
clean:
rm - f hello * .o * . out * .so
(3)hello_class.py
- I / usr / include / python2. 4
LIB_FLAGS = \
- lboost_python
SOURCE = \
hello_class.cpp
all:${SOURCE}
g ++ ${PYTHON_INCLUDE_FLAGS} ${SOURCE} ${LIB_FLAGS} - shared - o hello.so
clean:
rm - f hello * .o * . out * .so
import hello
planet = hello.World()
planet. set ( ' howdy ' )
planet.greet()
planet = hello.World()
planet. set ( ' howdy ' )
planet.greet()
更复杂的调用见上面提到的David Abrahams的文章。
本文转自xiaotie博客园博客，原文链接http://www.cnblogs.com/xiaotie/archive/2006/02/22/335633.html如需转载请自行联系原作者
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