似乎答案实际上在这里：https ://docs.python.org/3.6/extending/newtypes.html
有例子，但并不是很容易。
编辑1：
实际上，并不是将C 对象包装在Python对象中，而是使用C 代码创建Python对象。（edit2：所以您可以包装C 对象！）
编辑2：
。
原始C ++文件： Voice.cpp
#include <cstdio>
#include "Voice.h"
namespace transformation
{
Voice::Voice(int fftSize) {
printf("c++ constructor of voice\n");
this->fftSize=fftSize;
mem=new double[fftSize];
}
Voice::~Voice() { delete [] mem; }
int Voice::filter(int freq) {
printf("c++ voice filter method\n");
return (doubleIt(3));
}
int Voice::doubleIt(int i) { return 2*i; }
}
。
原始h文件： Voice.h
namespace transformation {
class Voice {
public:
double *mem;
int fftSize;
Voice(int fftSize);
~Voice();
int filter(int freq);
int doubleIt(int i);
};
}
。
C ++ Python包装器文件：voiceWrapper.cpp
#include <Python.h>
#include <cstdio>
//~ #include "structmember.h"
#include "Voice.h"
using transformation::Voice;
typedef struct {
PyObject_HEAD
Voice * ptrObj;
} PyVoice;
static PyModuleDef voicemodule = {
PyModuleDef_HEAD_INIT,
"voice",
"Example module that wrapped a C++ object",
-1,
NULL, NULL, NULL, NULL, NULL
};
static int PyVoice_init(PyVoice *self, PyObject *args, PyObject *kwds)
// initialize PyVoice Object
{
int fftSize;
if (! PyArg_ParseTuple(args, "i", &fftSize))
return -1;
self->ptrObj=new Voice(fftSize);
return 0;
}
static void PyVoice_dealloc(PyVoice * self)
// destruct the object
{
delete self->ptrObj;
Py_TYPE(self)->tp_free(self);
}
static PyObject * PyVoice_filter(PyVoice* self, PyObject* args)
{
int freq;
int retval;
if (! PyArg_ParseTuple(args, "i", &freq))
return Py_False;
retval = (self->ptrObj)->filter(freq);
return Py_BuildValue("i",retval);
}
static PyMethodDef PyVoice_methods[] = {
{ "filter", (PyCFunction)PyVoice_filter, METH_VARARGS, "filter the mem voice" },
{NULL} /* Sentinel */
};
static PyTypeObject PyVoiceType = { PyVarObject_HEAD_INIT(NULL, 0)
"voice.Voice" /* tp_name */
};
PyMODINIT_FUNC PyInit_voice(void)
// create the module
{
PyObject* m;
PyVoiceType.tp_new = PyType_GenericNew;
PyVoiceType.tp_basicsize=sizeof(PyVoice);
PyVoiceType.tp_dealloc=(destructor) PyVoice_dealloc;
PyVoiceType.tp_flags=Py_TPFLAGS_DEFAULT;
PyVoiceType.tp_doc="Voice objects";
PyVoiceType.tp_methods=PyVoice_methods;
//~ PyVoiceType.tp_members=Noddy_members;
PyVoiceType.tp_init=(initproc)PyVoice_init;
if (PyType_Ready(&PyVoiceType) < 0)
return NULL;
m = PyModule_Create(&voicemodule);
if (m == NULL)
return NULL;
Py_INCREF(&PyVoiceType);
PyModule_AddObject(m, "Voice", (PyObject *)&PyVoiceType); // Add Voice object to the module
return m;
}
。
distutils文件： setup.py
from distutils.core import setup, Extension
setup(name='voicePkg', version='1.0', \
ext_modules=[Extension('voice', ['voiceWrapper.cpp','Voice.cpp'])])
。
python测试文件： test.py
import voice
v=voice.Voice(512)
result=v.filter(5)
print('result='+str(result))
。
和魔术：
sudo python3 setup.py install
python3 test.py
输出为：
c++ constructor of voice
c++ voice filter method
result=6
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