[Swig-user] How to get C++ exceptions in Python?

[michael k. <ko...@gm...>]

Hi.
I can't make Python print correct C++ exception that I throw (with
exception.what() message).
Here's the example: https://dl.dropbox.com/u/12634473/swig_py_exception.tar.bz2

Building:

[kornerr@korenmain swig_py_exception]$ make
swig -includeall -python -c++ foo.i
Exception.h:11: Warning 401: Nothing known about base class
'std::exception'. Ignored.
Exception.h:31: Warning 473: Returning a pointer or reference in a
director method is not recommended.
g++ -fPIC -shared -o _foo.so foo_wrap.cxx -I/usr/include/python2.7

Running:

[kornerr@korenmain swig_py_exception]$ ./runfoo
Traceback (most recent call last):
  File "./runfoo", line 4, in <module>
    a.run()
  File "/home/kornerr/p/swig_py_exception/foo.py", line 111, in run
    def run(self): return _foo.A_run(self)
foo.Exception

As you see, there's some weird warning about std::exception, and in
Python there's just 'foo.Exception', nothing like exception.what()
message.
How do I fix it?
Thanks.