我开始在C++中编写一些我想在Python代码中调用的模块。为此，我使用boostpython。随着代码的增长，我决定将其分成几个.cpp文件。现在，我有了这样的东西：

食品.cpp#include "Bar.hpp"

#include "Baz.hpp"

#include

using namespace boost::python;

BOOST_PYTHON_MODULE(foo){

def("help", help);

class_("Bar", init<:list>())

.def("add", &Bar::add)

.def("show", &Bar::show);

}

酒吧cpp

^{pr2}$

巴水电站#ifndef Bar_hpp

#define Bar_hpp

#include

#include

#include

namespace bp=boost::python;

class Bar{

private:

std::vector<:string> items;

public:

Bar(bp::list list);

~Bar();

void add(std::string x);

bp::list show();

};

#endif

巴兹.cpp#include

#include

#include

namespace bp=boost::python;

//C++ vector to Python list

template

bp::list toPythonList(std::vector vector) {

typename std::vector::iterator iter;

bp::list list;

for (iter = vector.begin(); iter != vector.end(); ++iter) {

list.append(*iter);

}

return list;

}

//Python list to C++ int vector

std::vector toCppVectorInt(bp::list list){

std::vector vector;

for (int i=0;i !=bp::len(list) ;i++){

vector.push_back(bp::extract((list)[i]));

}

return vector;

}

//Python list to C++ string vector

std::vector<:string> toCppVectorStr(bp::list list){

std::vector<:string> vector;

for (int i=0;i !=bp::len(list) ;i++){

vector.push_back(bp::extract<:string>((list)[i]));

}

return vector;

}

std::string help(){

return "some help information ";

}

巴兹水电站#ifndef Baz_hpp

#define Baz_hpp

#include

#include

#include

namespace bp=boost::python;

template

bp::list toPythonList(std::vector vector);

//Python list to C++ int vector

std::vector toCppVectorInt(bp::list list);

//Python list to C++ string vector

std::vector<:string> toCppVectorStr(bp::list list);

std::string help();

#endif

我的设置.py文件：from distutils.core import setup

from distutils.extension import Extension

setup(name="PackageName", ext_modules=[Extension("foo",["foo.cpp"],

libraries = ["boost_python"])

])

编译时使用：python setup.py build

我得到文件福索(编译无错误地终止)。不幸的是，它不起作用。当我试图在Python解释器中使用它时，我收到了这样的效果：Python 2.7.6 (default, Jun 22 2015, 17:58:13)

[GCC 4.8.2] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>> import foo

Traceback (most recent call last):

File "", line 1, in

ImportError: ./foo.so: undefined symbol: _ZN3NNB3addESs

>>>

我应该在代码中更正什么？在