On 10/01/2014 14:16, Gary Oberbrunner wrote:
[I posted this on StackOverflow yesterday, but got nothing. Hoping you will have some insight!]
I'm writing a C++ python extension. I have a boost::python extension function
static void EXTrender_effect(EffectGlobals_t *effect_handle, std::string preset, bp::object dest, int xdim, int ydim) { ... } that I export as usual in my boost.python extension:
def("render_effect", EXTrender_effect);
When I call that from python(2.7), I get a C++ exception boost::python::error_already_set. Tracing that down in Visual Studio, I can see it's coming from a boost::python::objects::function::argument_error. So OK, I have an argument error; I'm probably calling it with the wrong args. What I'd like to do is print or throw something sensible in my python extension when this happens, so users of my extension will see the nice message that I know is lurking in PyErr_Fetch. (I can see the message getting built in the boost.python argument_error code.)
What is the exception you see from the python side? something like: ArgumentError: Python argument types in function_name(function_args) did not match C++ signature: cpp_function_name(cpp_args) -- Giuseppe Corbelli WASP Software Engineer, Copan Italia S.p.A Phone: +390303666318 Fax: +390302659932 E-mail: giuseppe.corbelli@copanitalia.com