Question

我包含了一个C ++和一个自定义的execption类，如问题的答案中所述：How do I propagate C++ exceptions to Python in a SWIG wrapper library?
在Python中使用我的类，调用抛出异常并捕获异常的函数会产生以下错误：

Traceback (most recent call last):
    File "../WrapperTester/src/main.py", line 17, in <module>
        ret = cow.milkCow()
    File "..\WrapperTester\src\CowLib\CowLib.py", line 115, in milkCow
        return _CowLib.Cow_milkCow(self)
src.CowLib.CowLib.CowException: None

这是我的C ++类头，包括异常：

class CowException {
private:
    std::string message = "";
public:
    CowException(std::string msg);
    ~CowException() {};
    std::string what();
};

class _Cow
{
private:
    int milk;
    int hunger;

public:
    _Cow();
    ~_Cow();

    int milkCow() throw(CowException);
    void feed(int food) throw(CowException);
};

我的SWIG标题：

%module CowLib

%include "exception.i"
%include "Cow.i"

%{
#define SWIG_FILE_WITH_INIT
#include "Cow.h"
#include "_Cow.h"
static PyObject* pCowException;
%}

%init %{
    pCowException = PyErr_NewException("_CowLib.CowException", NULL, NULL);
    Py_INCREF(pCowException);
    PyModule_AddObject(m, "CowException", pCowException);
%}

%exception Cow::milkCow {
    try {
        $action
    } catch (CowException &e) {
        PyErr_SetString(pCowException, e.what().c_str());
        SWIG_fail;
    }
}

%exception Cow::feed {
    try {
        $action
    } catch (CowException &e) {
        PyErr_SetString(pCowException, e.what().c_str());
        SWIG_fail;
    }
}

%include "_Cow.h"

%pythoncode %{
   CowException = _CowLib.CowException
%}

Header＆＃34; Cow.i＆＃34;是＆＃34;标准＆＃34; SWIG-部首：

%module Cow

%{
#include "_Cow.h"
#include "Cow.h"
%}

%include "Cow.h"

SWIG：包装的C ++异常在Python

0 个答案: