//定义python 数据成员
PyMemberDef py_data_member[] = {
{"v",T_INT,offsetof(py_data,v.v),READONLY,"v"},
{NULL}
PyTypeObject py_data_type_type = {
#if defined(NPY_PY3K)
PyVarObject_HEAD_INIT(NULL, 0)
#else
PyObject_HEAD_INIT(NULL)
0, /* ob_size */
#endif
"py_data",
sizeof(py_data),
0, /* tp_itemsize */
0, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
#if defined(NPY_PY3K)
0, /* tp_reserved */
#else
0, /* tp_compare */
#endif
0, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
0, /* tp_call */
0, /* tp_str */
0, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
0, /* tp_flags */
0, /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
0, /* tp_methods */
py_signal_type_member, /* tp_members */
static PyObject *type_getitem(char *ip, PyArrayObject* ap)
PyTypeObject* type = (PyTypeObject*)&py_data_type_type;
py_data *self = (py_data*)type->tp_alloc(type, 0);
self->v = *((data*)ip);
return (PyObject *)self;
static void type_copyswapn(void*dst, npy_intp dstride, void* src, npy_intp sstride,
npy_intp n, int swap, void *NPY_UNUSED(arr))
return;
static void data_copyswap(void *dst, void* src, int swap, void* NPY_UNUSED(arr))
if (!src)
return;
data *sig = (data*)dst;
memcpy(sig, src, sizeof(data));
static int type_setitem(PyObject* op, char *ov, PyArrayObject* ap)
return 0;
static npy_bool type_nonzero(char *ip, PyArrayObject* ap)
return (npy_bool)true;
//直接拿着返回的数值就可以创建一个numpy 数组了。 在python 层也能返回numpy array 直接进行使用
static int register_numpy_dtype()
if (PyType_Ready(&py_data_type_type) < 0) {
PyErr_Print();
PyErr_SetString(PyExc_SystemError, "could not initialize py_data_type_type");
return -1;
int type_num = 0;
static PyArray_ArrFuncs _PyDataType_ArrFuncs;
PyArray_InitArrFuncs(&_PySignalType_ArrFuncs);
_PyDataType_ArrFuncs.getitem = (PyArray_GetItemFunc *)type_getitem;
_PyDataType_ArrFuncs.setitem = (PyArray_SetItemFunc *)type_setitem;
_PyDataType_ArrFuncs.copyswap = (PyArray_CopySwapFunc *)data_copyswap;
_PyDataType_ArrFuncs.copyswapn = (PyArray_CopySwapNFunc *)type_copyswapn;
_PyDataType_ArrFuncs.nonzero = (PyArray_NonzeroFunc *)type_nonzero;
PyArray_Descr *data_descr;
signal_descr = PyObject_New(PyArray_Descr, &PyArrayDescr_Type);
signal_descr->typeobj = &py_data_type_type;
signal_descr->kind = 'q';
signal_descr->type = 'j';
signal_descr->byteorder = '=';
signal_descr->type_num = 0;
signal_descr->elsize = sizeof(data);
signal_descr->alignment = 8;
signal_descr->subarray = NULL;
signal_descr->fields = NULL;
signal_descr->names = NULL;
signal_descr->f = &_PyDataType_ArrFuncs;
Py_INCREF(&py_data_type_type);
type_num = PyArray_RegisterDataType(signal_descr);
if (type_num < 0)
PyErr_SetString(PyExc_SystemError, "could not initialize py_data_type_type");
return -1;
return 0;
