SWIG c++到python:向量问题

我在此遵循文档: http://www.swig.org/Doc3.0/Library.html#Library_stl_cpp_library 为涉及向量的简单示例代码编写包装。

这是头文件:

### word.h ###
#include<string>
#include<vector>

class Word{
public:
    Word(std::string word, int numWords, std::vector<double> &values);
    ~Word();

    void updateWord(std::string newWord);
    std::string getWord();
    void processValues();

private:
    std::string theWord;
    int totalWords;
    std::vector<double> values;
};

以及源文件:

### word.cpp ###
#include "word.h"
#include <cfloat>
#include <cmath>
#include <cstdlib>
#include <iostream>
#include <fstream>
#include <time.h>

Word::Word(std::string word, int numWords, std::vector<double> &values) :
    theWord(word), totalWords(numWords), values(values){
    // TODO: constructor
}

Word::~Word() {
    // TODO: destructor
}

void Word::updateWord(std::string newWord) {
    this->theWord = newWord;
}

std::string Word::getWord() {
    return this->theWord;
}

void Word::processValues() {
    values.resize(totalWords);
    // do something with values here
}

/*  
    rest of the code that uses the other imports
*/

以下是接口文件:

### word.i ###
%module word
%{
#include "word.h"
%}

%include "std_string.i"
%include "std_vector.i"

namespace std {
    %template(vectord) vector<double>;
}

%include "word.h"

我的编译步骤如下:

swig -c++ -python word.i
g++ -c -fpic word.cpp word_wrap.cxx -I/usr/include/python2.7
g++ -shared word.o word_wrap.o -o _word.so -lstdc++

编译过程没有任何错误但是,在尝试用python创建对象时,出现以下错误:

In [1]: import word

In [2]: w = word.Word('test', 10, [10.2])
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-2-ee2e5c406fd9> in <module>()
----> 1 w = word.Word('test', 10, [10.2])

/home/anarayan/workspace/swig-learn/word.pyc in __init__(self, word, numWords, values)
    276 
    277     def __init__(self, word, numWords, values):
--> 278         this = _word.new_Word(word, numWords, values)
    279         try:
    280             self.this.append(this)

TypeError: in method 'new_Word', argument 3 of type 'std::vector< double,std::allocator< double > > &'

通过在线搜索,我相信在swig定义中使用模板可以解决这个问题。

但是,在我的情况下没有。你能告诉我正确的方向吗?