使用PyArray_SimpleNewFromData的正确方法？

Question

我正在尝试在python扩展名中创建一个numpy数组。PyArray_SimpleNewFromData的调用给了我一个段错误。我试图将其修复几个小时，现在我不知道该如何发生了。这是一个自我复制的示例：

$ cat test.c

#define PY_SSIZE_T_CLEAN
#include <Python.h>

#define NPY_NO_DEPRECATED_API NPY_1_7_API_VERSION
#include "numpy/arrayobject.h"

 void main(int argc, char ** argv) {
    char* data;
    npy_intp dims[2];
    data = malloc(20);
    if(NULL == data)
        exit(-1);
    strncpy(data,"helloworld",10);
    dims[0] = 5;
    dims[1] = 2;
    PyObject* result = PyArray_SimpleNewFromData(2, dims, NPY_BYTE, data);
}

$ gcc $（python3-config --includes）-g -o test test.c $（python3-config --libs）

$ echo“ run; bt” | gdb测试

GNU gdb (Ubuntu 8.1-0ubuntu3.2) 8.1.0.20180409-git
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Reading symbols from test...done.
(gdb) Starting program: /home/mag/project/mouse/test ;bt
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".

Program received signal SIGSEGV, Segmentation fault.
0x0000555555554dc6 in main (argc=1, argv=0x7fffffffddc8) at test.c:16
16      PyObject* result = PyArray_SimpleNewFromData(2, dims, NPY_BYTE, data);

Answer 1

可能未初始化numpy。将以下行添加到main（）的开头有帮助：

 Py_Initialize();
 import_array();