Hi Giuseppe,
thank you for the detailed response!
On 11/07/2012 08:56 AM, Giuseppe Corbelli wrote:
On 06/11/2012 15:35, Martin Hellmich wrote:
I've based my code on.
http://stackoverflow.c om/questions/9620268/boost-python-custom-exception-class
I have used the same reference and also this suggestion for including the
other attributes shown here:
http://stackoverflow.com/questions/11448735/boostpython-export-custom-exception-and-inherit-from-pythons-exception
However, this doesn't solve my problem.
It works fine when I throw the MyException in C++, but when I raise the
MyCPPException in Python, the translator is not called (which makes
sense), so
the attribute 'cause' does not change.
Actually, before I throw the MyException for the first time in C++,
MyCPPException does not have the attribute 'cause' at all.
Of course.
This issue should be the same, if I set the exception with
PyErr_SetObject,
since the translator is not called, when I 'raise' it.
Very likely the SetString uses SetObject under the hood, but I never
used SetObject.
I'd try to:
*) As you were writing before, declare a C++ class MyException: public
std::exception {
MyException();
MyException(int code, const std::string &string);
int code();
const char* what();
int errorCode;
std::string errorMessage;
};
*) Wrap it as a bpy::class_ so you can use it like a standard exception
with all the attributes you need.
This is the part that I miss, I guess. How can I wrap a class so that it
works like an exception in python? In the solutions on stackoverflow the
translation to an exception only happens in the translator, meaning that
I cannot call 'raise MyException' in python, as it doesn't inherit from
(the python) Exception.
PyErr_NewException has to be based on a type of python Exception, so I
cannot base it on my c++ class, right?
Have you ever used the 3rd parameter to specify a dict?
Cheers
Martin
*) Register an exception translator as defined before. Maybe the
to-python conversion performed in the exception translator does work
even if you have wrapped MyException as a standard class.
--
Martin Hellmich Information Technology Department
mhell...@cern.ch CERN
+41 22 76 765 26 CH-1211 Geneva 23
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