小编Dan*_*oni的帖子

我在不使用Cython的情况下编写Python C-Extension.

我想在C中分配一个double数组,在内部函数中使用它(恰好在Fortran中)并返回它.我指出C-Fortran接口在C中完美运行.

static PyObject *
Py_drecur(PyObject *self, PyObject *args)
{
  // INPUT
  int n;
  int ipoly;
  double al;
  double be;

  if (!PyArg_ParseTuple(args, "iidd", &n, &ipoly, &al, &be))
    return NULL;

  // OUTPUT
  int nd = 1;
  npy_intp dims[] = {n};
  double a[n];
  double b[n];
  int ierr;

  drecur_(n, ipoly, al, be, a, b, ierr);

  // Create PyArray
  PyObject* alpha = PyArray_SimpleNewFromData(nd, dims, NPY_DOUBLE, a);
  PyObject* beta = PyArray_SimpleNewFromData(nd, dims, NPY_DOUBLE, b);

  Py_INCREF(alpha);
  Py_INCREF(beta);

  return Py_BuildValue("OO", alpha, beta);
}

我调试了这段代码,当我尝试从a创建alpha时,我遇到了Segmentation错误.到那里一切正常.功能drecur_工作,如果删除它我会遇到同样的问题.

现在,围绕C数据定义PyArray的标准方法是什么？我找到了文档,但没有很好的例子.还有,内存泄漏怎么样？返回之前INCREF是否正确,以便保留alpha和beta的实例？那些不再需要的解除分配怎么样？

编辑 …

我正在编写Eclipse RCP,我想询问用户在应用程序关闭时是否备份数据库.从文件>退出菜单执行此操作非常简单,因为我定义了一个命令退出:

public class ExitCommand extends AbstractHandler implements IHandler {

@Override
public Object execute(ExecutionEvent event) throws ExecutionException {
    final IWorkbench workbench = PlatformUI.getWorkbench();
    if (workbench == null)
        return null;

    // Ask whether the user wants to back up the information
    Shell shell = new Shell(workbench.getDisplay());
    MessageBox messageBox = new MessageBox(shell, SWT.ICON_QUESTION
            | SWT.YES | SWT.NO);
    messageBox.setMessage("You are leaving CatSysPD. Do you want to make a backup of the DataBase? (recommended)");
    messageBox.setText("On Exit Backup");
    int response = messageBox.open();
    if (response == …