SWIG c++到python:向量问题

我在这里遵循文档：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器。

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;
};

和源文件：

### 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
*/

这是接口文件：

### 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++

编译过程中没有任何错误。然而，在尝试用Python创建对象时，我得到了以下错误：

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。

然而，就我而言，它并没有。你能告诉我正确的方向吗？