CApi中的PyArg_ParseTuple SegFaults [英] PyArg_ParseTuple SegFaults in CApi
问题描述
我正在编写代码,试图适应NumPy数组的C API.
I am writing a code, trying to get used to the C API of NumPy arrays.
#include <Python.h>
#include "numpy/arrayobject.h"
#include <stdio.h>
#include <stdbool.h>
static char doc[] =
"Document";
static PyArrayObject *
trace(PyObject *self, PyObject *args){
PyArrayObject *matin;
if (!PyArg_ParseTuple(args, "O!",&PyArray_Type, &matin))
return NULL;
printf("a");
return matin;
}
static PyMethodDef TraceMethods[] = {
{"trace", trace, METH_VARARGS, doc},
{NULL, NULL, 0, NULL}
};
PyMODINIT_FUNC
inittrace(void)
{
(void) Py_InitModule("trace", TraceMethods);
import_array();
}
这是精简版.我只希望能够获取类型为PyArrayObject
的对象并将其返回.不幸的是,这也导致了SegFault.
This is a stripped-down version. I just want to be able to get an object of type PyArrayObject
and return it back. Unfortunately this gives a SegFault also.
Linux,64位,Python 2.7.1
Linux, 64-bit, Python 2.7.1
推荐答案
来自文档:
O
(对象)[PyObject *]
将Python对象(不进行任何转换)存储在C对象指针中.因此,C程序将接收传递的实际对象. 对象的引用计数未增加.存储的指针不是 NULL .
O
(object) [PyObject *]
Store a Python object (without any conversion) in a C object pointer. The C program thus receives the actual object that was passed. The object’s reference count is not increased. The pointer stored is not NULL.
O!
(对象)[ typeobject ,PyObject *]
将Python对象存储在C对象指针中.这类似于O
,但是...
O!
(object) [typeobject, PyObject *]
Store a Python object in a C object pointer. This is similar to O
, but...
您正在返回被盗的参考.首先增加它.
You're returning a stolen reference. Increment it first.
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