Swig C ++：接口vector <Class object *>

基本上，我试图有一个元组/列表，其中包含python中不同数据类型的值（float / int / bool / char / list）的数据字典。

我从下面的代码中得到这个：

(<f_p.Bunch; proxy of <Swig Object of type 'Bunch *' at 0x7f4954bdde10> >, <f_p.Bunch; proxy of <Swig Object of type 'Bunch *' at 0x7f4954bdde40> >, <f_p.Bunch; proxy of <Swig Object of type 'Bunch
*' at 0x7f495668be70> >, <f_p.Bunch; proxy of <Swig Object of type 'Bunch *' at 0x7f4952d09a50> >)

我想以这种形式获取输出：

（{'I'：1.0，'B'：2.0，'C'：3.0，'dert _'：[1.2，2.3，3.4，4.5，5.6]}）

我无法处理此类对象指针（bunch *），也找不到任何解决方案。我在网上看了一下，但找不到适合我的案件的解决方案。

f_p.cpp：

#include <iostream>
#include "f_p.h"
#define CPP_14 0

std::vector<Bunch*> form_p(const double *array, int x, int y)  {

    std::vector<Bunch*> v;
    Bunch *b1 = new Bunch(5);
    b1->set_I_B_C(1.0, 2.0, 3.0);
    b1->set_dert_({1.2, 2.3, 3.4, 4.5, 5.6});

    float *_dert = b1->get_dert_();
    for(int i=0; i<5; i++) {
        std::cout << _dert[i] << std::endl;
    }

    v.push_back(b1);
    v.push_back(b1); 
    v.push_back(b1); 
    v.push_back(b1); 

    return v;
}

f_p.h：

#ifndef F_P_H
#define f_P_H
#include <memory> 
#include <vector>
#include <memory> 
#include <algorithm>
#include <tuple>
#include <initializer_list>

class Bunch {
    private:
        unsigned int start;
        unsigned int end;
        float I;
        float B;
        float C;
        bool isPos;
        std::unique_ptr<float[]> dert_;
    public:

        explicit Bunch(size_t width) {
            #if CPP_14
            this->dert_ = std::make_unique<float[]>(width);
            #else
            this->dert_ = std::unique_ptr<float[]>(new float[width]);
            #endif
            std::fill_n(this->dert_.get(), width, -1.0);
        }

        void set_I_B_C(float I, float B, float C) {
            this->I = I;
            this->B = B;
            this->C = C;
        }

        std::tuple<float, float, float> get_I_B_C() const {
            return std::make_tuple(this->I, this->B, this->C);
        }

        float* get_dert_() const {
            return this->dert_.get();
        }

        void set_dert_(std::initializer_list<float> l) {
            int i = 0;
            for (auto e: l){
                dert_[i++] = e;
            }
        }
};
/* Define function prototype */
std::vector<Bunch*> form_p(const double *array, int x, int y)  ;
#endif

f_p.i：

%module f_p
#define SWIGPYTHON_BUILTIN

%{
  #include "numpy/arrayobject.h"
  #define SWIG_FILE_WITH_INIT  /* To import_array() below */
  #include "f_p.h"
%}
%include "std_map.i"
%import "std_deque.i" 
%import "std_vector.i" 

%template (mapiv) std::map<char,float>;
%template () std::vector<Bunch*>;
%include "numpy.i"

%init %{
import_array();
%}

%apply (double* IN_ARRAY2, int DIM1, int DIM2) {
  (const double* array, int x, int y)
}

%include "f_p.h"

build.sh：

rm *.o f_p_wrap.cpp _f_p.so f_p.py
rm -rf __pycache__

g++ -O3 -march=native -fPIC -c f_p.cpp
swig -python -c++ -o f_p_wrap.cpp f_p.i

# Next, compile the wrapper code:

g++ -O3 -march=native -w -fPIC -c $(pkg-config --cflags --libs python3) -I /home/antpc/anaconda3/lib/python3.7/site-packages/numpy/core/include f_p.cpp f_p_wrap.cpp

g++ -std=c++11 -O3 -march=native -shared f_p.o f_p_wrap.o -o _f_p.so -lm

test_sample.py：

from f_p import form_p
import numpy as np
x = np.random.randn(3, 4)
print(form_p(x))